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1/**************************************************************************/
2/* */
3/* IBM System i and System p Virtual NIC Device Driver */
4/* Copyright (C) 2014 IBM Corp. */
5/* Santiago Leon (santi_leon@yahoo.com) */
6/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7/* John Allen (jallen@linux.vnet.ibm.com) */
8/* */
9/* This program is free software; you can redistribute it and/or modify */
10/* it under the terms of the GNU General Public License as published by */
11/* the Free Software Foundation; either version 2 of the License, or */
12/* (at your option) any later version. */
13/* */
14/* This program is distributed in the hope that it will be useful, */
15/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17/* GNU General Public License for more details. */
18/* */
19/* You should have received a copy of the GNU General Public License */
20/* along with this program. */
21/* */
22/* This module contains the implementation of a virtual ethernet device */
23/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24/* option of the RS/6000 Platform Architecture to interface with virtual */
25/* ethernet NICs that are presented to the partition by the hypervisor. */
26/* */
27/* Messages are passed between the VNIC driver and the VNIC server using */
28/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29/* issue and receive commands that initiate communication with the server */
30/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31/* are used by the driver to notify the server that a packet is */
32/* ready for transmission or that a buffer has been added to receive a */
33/* packet. Subsequently, sCRQs are used by the server to notify the */
34/* driver that a packet transmission has been completed or that a packet */
35/* has been received and placed in a waiting buffer. */
36/* */
37/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38/* which skbs are DMA mapped and immediately unmapped when the transmit */
39/* or receive has been completed, the VNIC driver is required to use */
40/* "long term mapping". This entails that large, continuous DMA mapped */
41/* buffers are allocated on driver initialization and these buffers are */
42/* then continuously reused to pass skbs to and from the VNIC server. */
43/* */
44/**************************************************************************/
45
46#include <linux/module.h>
47#include <linux/moduleparam.h>
48#include <linux/types.h>
49#include <linux/errno.h>
50#include <linux/completion.h>
51#include <linux/ioport.h>
52#include <linux/dma-mapping.h>
53#include <linux/kernel.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/init.h>
58#include <linux/delay.h>
59#include <linux/mm.h>
60#include <linux/ethtool.h>
61#include <linux/proc_fs.h>
62#include <linux/in.h>
63#include <linux/ip.h>
64#include <linux/irq.h>
65#include <linux/kthread.h>
66#include <linux/seq_file.h>
67#include <linux/debugfs.h>
68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
76#include <linux/seq_file.h>
77
78#include "ibmvnic.h"
79
80static const char ibmvnic_driver_name[] = "ibmvnic";
81static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
82
83MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
84MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
85MODULE_LICENSE("GPL");
86MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
87
88static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
89static int ibmvnic_remove(struct vio_dev *);
90static void release_sub_crqs(struct ibmvnic_adapter *);
91static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
92static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
93static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
94static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
95static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
96 union sub_crq *sub_crq);
97static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
98static int enable_scrq_irq(struct ibmvnic_adapter *,
99 struct ibmvnic_sub_crq_queue *);
100static int disable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int pending_scrq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static int ibmvnic_poll(struct napi_struct *napi, int data);
107static void send_map_query(struct ibmvnic_adapter *adapter);
108static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
109static void send_request_unmap(struct ibmvnic_adapter *, u8);
110
111struct ibmvnic_stat {
112 char name[ETH_GSTRING_LEN];
113 int offset;
114};
115
116#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
117 offsetof(struct ibmvnic_statistics, stat))
118#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
119
120static const struct ibmvnic_stat ibmvnic_stats[] = {
121 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
122 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
123 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
124 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
125 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
126 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
127 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
128 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
129 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
130 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
131 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
132 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
133 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
134 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
135 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
136 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
137 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
138 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
139 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
140 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
141 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
142 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
143};
144
145static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
146 unsigned long length, unsigned long *number,
147 unsigned long *irq)
148{
149 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
150 long rc;
151
152 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
153 *number = retbuf[0];
154 *irq = retbuf[1];
155
156 return rc;
157}
158
159/* net_device_ops functions */
160
161static void init_rx_pool(struct ibmvnic_adapter *adapter,
162 struct ibmvnic_rx_pool *rx_pool, int num, int index,
163 int buff_size, int active)
164{
165 netdev_dbg(adapter->netdev,
166 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
167 index, num, buff_size);
168 rx_pool->size = num;
169 rx_pool->index = index;
170 rx_pool->buff_size = buff_size;
171 rx_pool->active = active;
172}
173
174static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
175 struct ibmvnic_long_term_buff *ltb, int size)
176{
177 struct device *dev = &adapter->vdev->dev;
178
179 ltb->size = size;
180 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
181 GFP_KERNEL);
182
183 if (!ltb->buff) {
184 dev_err(dev, "Couldn't alloc long term buffer\n");
185 return -ENOMEM;
186 }
187 ltb->map_id = adapter->map_id;
188 adapter->map_id++;
189 send_request_map(adapter, ltb->addr,
190 ltb->size, ltb->map_id);
191 init_completion(&adapter->fw_done);
192 wait_for_completion(&adapter->fw_done);
193 return 0;
194}
195
196static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
198{
199 struct device *dev = &adapter->vdev->dev;
200
201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
202 send_request_unmap(adapter, ltb->map_id);
203}
204
205static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
206 struct ibmvnic_rx_pool *pool)
207{
208 struct device *dev = &adapter->vdev->dev;
209 int i;
210
211 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
212 if (!pool->free_map)
213 return -ENOMEM;
214
215 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
216 GFP_KERNEL);
217
218 if (!pool->rx_buff) {
219 dev_err(dev, "Couldn't alloc rx buffers\n");
220 kfree(pool->free_map);
221 return -ENOMEM;
222 }
223
224 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
225 pool->size * pool->buff_size)) {
226 kfree(pool->free_map);
227 kfree(pool->rx_buff);
228 return -ENOMEM;
229 }
230
231 for (i = 0; i < pool->size; ++i)
232 pool->free_map[i] = i;
233
234 atomic_set(&pool->available, 0);
235 pool->next_alloc = 0;
236 pool->next_free = 0;
237
238 return 0;
239}
240
241static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
242 struct ibmvnic_rx_pool *pool)
243{
244 int count = pool->size - atomic_read(&pool->available);
245 struct device *dev = &adapter->vdev->dev;
246 int buffers_added = 0;
247 unsigned long lpar_rc;
248 union sub_crq sub_crq;
249 struct sk_buff *skb;
250 unsigned int offset;
251 dma_addr_t dma_addr;
252 unsigned char *dst;
253 u64 *handle_array;
254 int shift = 0;
255 int index;
256 int i;
257
258 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
259 be32_to_cpu(adapter->login_rsp_buf->
260 off_rxadd_subcrqs));
261
262 for (i = 0; i < count; ++i) {
263 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
264 if (!skb) {
265 dev_err(dev, "Couldn't replenish rx buff\n");
266 adapter->replenish_no_mem++;
267 break;
268 }
269
270 index = pool->free_map[pool->next_free];
271
272 if (pool->rx_buff[index].skb)
273 dev_err(dev, "Inconsistent free_map!\n");
274
275 /* Copy the skb to the long term mapped DMA buffer */
276 offset = index * pool->buff_size;
277 dst = pool->long_term_buff.buff + offset;
278 memset(dst, 0, pool->buff_size);
279 dma_addr = pool->long_term_buff.addr + offset;
280 pool->rx_buff[index].data = dst;
281
282 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
283 pool->rx_buff[index].dma = dma_addr;
284 pool->rx_buff[index].skb = skb;
285 pool->rx_buff[index].pool_index = pool->index;
286 pool->rx_buff[index].size = pool->buff_size;
287
288 memset(&sub_crq, 0, sizeof(sub_crq));
289 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
290 sub_crq.rx_add.correlator =
291 cpu_to_be64((u64)&pool->rx_buff[index]);
292 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
293 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
294
295 /* The length field of the sCRQ is defined to be 24 bits so the
296 * buffer size needs to be left shifted by a byte before it is
297 * converted to big endian to prevent the last byte from being
298 * truncated.
299 */
300#ifdef __LITTLE_ENDIAN__
301 shift = 8;
302#endif
303 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
304
305 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
306 &sub_crq);
307 if (lpar_rc != H_SUCCESS)
308 goto failure;
309
310 buffers_added++;
311 adapter->replenish_add_buff_success++;
312 pool->next_free = (pool->next_free + 1) % pool->size;
313 }
314 atomic_add(buffers_added, &pool->available);
315 return;
316
317failure:
318 dev_info(dev, "replenish pools failure\n");
319 pool->free_map[pool->next_free] = index;
320 pool->rx_buff[index].skb = NULL;
321 if (!dma_mapping_error(dev, dma_addr))
322 dma_unmap_single(dev, dma_addr, pool->buff_size,
323 DMA_FROM_DEVICE);
324
325 dev_kfree_skb_any(skb);
326 adapter->replenish_add_buff_failure++;
327 atomic_add(buffers_added, &pool->available);
328}
329
330static void replenish_pools(struct ibmvnic_adapter *adapter)
331{
332 int i;
333
334 if (adapter->migrated)
335 return;
336
337 adapter->replenish_task_cycles++;
338 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
339 i++) {
340 if (adapter->rx_pool[i].active)
341 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
342 }
343}
344
345static void free_rx_pool(struct ibmvnic_adapter *adapter,
346 struct ibmvnic_rx_pool *pool)
347{
348 int i;
349
350 kfree(pool->free_map);
351 pool->free_map = NULL;
352
353 if (!pool->rx_buff)
354 return;
355
356 for (i = 0; i < pool->size; i++) {
357 if (pool->rx_buff[i].skb) {
358 dev_kfree_skb_any(pool->rx_buff[i].skb);
359 pool->rx_buff[i].skb = NULL;
360 }
361 }
362 kfree(pool->rx_buff);
363 pool->rx_buff = NULL;
364}
365
366static int ibmvnic_open(struct net_device *netdev)
367{
368 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
369 struct device *dev = &adapter->vdev->dev;
370 struct ibmvnic_tx_pool *tx_pool;
371 union ibmvnic_crq crq;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int tx_subcrqs;
375 int i, j;
376
377 rxadd_subcrqs =
378 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
379 tx_subcrqs =
380 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
381 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
382 be32_to_cpu(adapter->login_rsp_buf->
383 off_rxadd_buff_size));
384 adapter->map_id = 1;
385 adapter->napi = kcalloc(adapter->req_rx_queues,
386 sizeof(struct napi_struct), GFP_KERNEL);
387 if (!adapter->napi)
388 goto alloc_napi_failed;
389 for (i = 0; i < adapter->req_rx_queues; i++) {
390 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
391 NAPI_POLL_WEIGHT);
392 napi_enable(&adapter->napi[i]);
393 }
394 adapter->rx_pool =
395 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
396
397 if (!adapter->rx_pool)
398 goto rx_pool_arr_alloc_failed;
399 send_map_query(adapter);
400 for (i = 0; i < rxadd_subcrqs; i++) {
401 init_rx_pool(adapter, &adapter->rx_pool[i],
402 IBMVNIC_BUFFS_PER_POOL, i,
403 be64_to_cpu(size_array[i]), 1);
404 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
405 dev_err(dev, "Couldn't alloc rx pool\n");
406 goto rx_pool_alloc_failed;
407 }
408 }
409 adapter->tx_pool =
410 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
411
412 if (!adapter->tx_pool)
413 goto tx_pool_arr_alloc_failed;
414 for (i = 0; i < tx_subcrqs; i++) {
415 tx_pool = &adapter->tx_pool[i];
416 tx_pool->tx_buff =
417 kcalloc(adapter->max_tx_entries_per_subcrq,
418 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
419 if (!tx_pool->tx_buff)
420 goto tx_pool_alloc_failed;
421
422 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
423 adapter->max_tx_entries_per_subcrq *
424 adapter->req_mtu))
425 goto tx_ltb_alloc_failed;
426
427 tx_pool->free_map =
428 kcalloc(adapter->max_tx_entries_per_subcrq,
429 sizeof(int), GFP_KERNEL);
430 if (!tx_pool->free_map)
431 goto tx_fm_alloc_failed;
432
433 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
434 tx_pool->free_map[j] = j;
435
436 tx_pool->consumer_index = 0;
437 tx_pool->producer_index = 0;
438 }
439 adapter->bounce_buffer_size =
440 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
441 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
442 GFP_KERNEL);
443 if (!adapter->bounce_buffer)
444 goto bounce_alloc_failed;
445
446 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
447 adapter->bounce_buffer_size,
448 DMA_TO_DEVICE);
449 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
450 dev_err(dev, "Couldn't map tx bounce buffer\n");
451 goto bounce_map_failed;
452 }
453 replenish_pools(adapter);
454
455 /* We're ready to receive frames, enable the sub-crq interrupts and
456 * set the logical link state to up
457 */
458 for (i = 0; i < adapter->req_rx_queues; i++)
459 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
460
461 for (i = 0; i < adapter->req_tx_queues; i++)
462 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
463
464 memset(&crq, 0, sizeof(crq));
465 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
466 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
467 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
468 ibmvnic_send_crq(adapter, &crq);
469
470 netif_start_queue(netdev);
471 return 0;
472
473bounce_map_failed:
474 kfree(adapter->bounce_buffer);
475bounce_alloc_failed:
476 i = tx_subcrqs - 1;
477 kfree(adapter->tx_pool[i].free_map);
478tx_fm_alloc_failed:
479 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
480tx_ltb_alloc_failed:
481 kfree(adapter->tx_pool[i].tx_buff);
482tx_pool_alloc_failed:
483 for (j = 0; j < i; j++) {
484 kfree(adapter->tx_pool[j].tx_buff);
485 free_long_term_buff(adapter,
486 &adapter->tx_pool[j].long_term_buff);
487 kfree(adapter->tx_pool[j].free_map);
488 }
489 kfree(adapter->tx_pool);
490 adapter->tx_pool = NULL;
491tx_pool_arr_alloc_failed:
492 i = rxadd_subcrqs;
493rx_pool_alloc_failed:
494 for (j = 0; j < i; j++) {
495 free_rx_pool(adapter, &adapter->rx_pool[j]);
496 free_long_term_buff(adapter,
497 &adapter->rx_pool[j].long_term_buff);
498 }
499 kfree(adapter->rx_pool);
500 adapter->rx_pool = NULL;
501rx_pool_arr_alloc_failed:
502 for (i = 0; i < adapter->req_rx_queues; i++)
503 napi_enable(&adapter->napi[i]);
504alloc_napi_failed:
505 return -ENOMEM;
506}
507
508static int ibmvnic_close(struct net_device *netdev)
509{
510 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
511 struct device *dev = &adapter->vdev->dev;
512 union ibmvnic_crq crq;
513 int i;
514
515 adapter->closing = true;
516
517 for (i = 0; i < adapter->req_rx_queues; i++)
518 napi_disable(&adapter->napi[i]);
519
520 netif_stop_queue(netdev);
521
522 if (adapter->bounce_buffer) {
523 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
524 dma_unmap_single(&adapter->vdev->dev,
525 adapter->bounce_buffer_dma,
526 adapter->bounce_buffer_size,
527 DMA_BIDIRECTIONAL);
528 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
529 }
530 kfree(adapter->bounce_buffer);
531 adapter->bounce_buffer = NULL;
532 }
533
534 memset(&crq, 0, sizeof(crq));
535 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
536 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
537 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
538 ibmvnic_send_crq(adapter, &crq);
539
540 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
541 i++) {
542 kfree(adapter->tx_pool[i].tx_buff);
543 free_long_term_buff(adapter,
544 &adapter->tx_pool[i].long_term_buff);
545 kfree(adapter->tx_pool[i].free_map);
546 }
547 kfree(adapter->tx_pool);
548 adapter->tx_pool = NULL;
549
550 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
551 i++) {
552 free_rx_pool(adapter, &adapter->rx_pool[i]);
553 free_long_term_buff(adapter,
554 &adapter->rx_pool[i].long_term_buff);
555 }
556 kfree(adapter->rx_pool);
557 adapter->rx_pool = NULL;
558
559 adapter->closing = false;
560
561 return 0;
562}
563
564static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
565{
566 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
567 int queue_num = skb_get_queue_mapping(skb);
568 struct device *dev = &adapter->vdev->dev;
569 struct ibmvnic_tx_buff *tx_buff = NULL;
570 struct ibmvnic_tx_pool *tx_pool;
571 unsigned int tx_send_failed = 0;
572 unsigned int tx_map_failed = 0;
573 unsigned int tx_dropped = 0;
574 unsigned int tx_packets = 0;
575 unsigned int tx_bytes = 0;
576 dma_addr_t data_dma_addr;
577 struct netdev_queue *txq;
578 bool used_bounce = false;
579 unsigned long lpar_rc;
580 union sub_crq tx_crq;
581 unsigned int offset;
582 unsigned char *dst;
583 u64 *handle_array;
584 int index = 0;
585 int ret = 0;
586
587 tx_pool = &adapter->tx_pool[queue_num];
588 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
589 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
590 be32_to_cpu(adapter->login_rsp_buf->
591 off_txsubm_subcrqs));
592 if (adapter->migrated) {
593 tx_send_failed++;
594 tx_dropped++;
595 ret = NETDEV_TX_BUSY;
596 goto out;
597 }
598
599 index = tx_pool->free_map[tx_pool->consumer_index];
600 offset = index * adapter->req_mtu;
601 dst = tx_pool->long_term_buff.buff + offset;
602 memset(dst, 0, adapter->req_mtu);
603 skb_copy_from_linear_data(skb, dst, skb->len);
604 data_dma_addr = tx_pool->long_term_buff.addr + offset;
605
606 tx_pool->consumer_index =
607 (tx_pool->consumer_index + 1) %
608 adapter->max_tx_entries_per_subcrq;
609
610 tx_buff = &tx_pool->tx_buff[index];
611 tx_buff->skb = skb;
612 tx_buff->data_dma[0] = data_dma_addr;
613 tx_buff->data_len[0] = skb->len;
614 tx_buff->index = index;
615 tx_buff->pool_index = queue_num;
616 tx_buff->last_frag = true;
617 tx_buff->used_bounce = used_bounce;
618
619 memset(&tx_crq, 0, sizeof(tx_crq));
620 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
621 tx_crq.v1.type = IBMVNIC_TX_DESC;
622 tx_crq.v1.n_crq_elem = 1;
623 tx_crq.v1.n_sge = 1;
624 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
625 tx_crq.v1.correlator = cpu_to_be32(index);
626 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
627 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
628 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
629
630 if (adapter->vlan_header_insertion) {
631 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
632 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
633 }
634
635 if (skb->protocol == htons(ETH_P_IP)) {
636 if (ip_hdr(skb)->version == 4)
637 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
638 else if (ip_hdr(skb)->version == 6)
639 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
640
641 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
642 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
643 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
644 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
645 }
646
647 if (skb->ip_summed == CHECKSUM_PARTIAL)
648 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
649
650 lpar_rc = send_subcrq(adapter, handle_array[0], &tx_crq);
651
652 if (lpar_rc != H_SUCCESS) {
653 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
654
655 if (tx_pool->consumer_index == 0)
656 tx_pool->consumer_index =
657 adapter->max_tx_entries_per_subcrq - 1;
658 else
659 tx_pool->consumer_index--;
660
661 tx_send_failed++;
662 tx_dropped++;
663 ret = NETDEV_TX_BUSY;
664 goto out;
665 }
666 tx_packets++;
667 tx_bytes += skb->len;
668 txq->trans_start = jiffies;
669 ret = NETDEV_TX_OK;
670
671out:
672 netdev->stats.tx_dropped += tx_dropped;
673 netdev->stats.tx_bytes += tx_bytes;
674 netdev->stats.tx_packets += tx_packets;
675 adapter->tx_send_failed += tx_send_failed;
676 adapter->tx_map_failed += tx_map_failed;
677
678 return ret;
679}
680
681static void ibmvnic_set_multi(struct net_device *netdev)
682{
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
684 struct netdev_hw_addr *ha;
685 union ibmvnic_crq crq;
686
687 memset(&crq, 0, sizeof(crq));
688 crq.request_capability.first = IBMVNIC_CRQ_CMD;
689 crq.request_capability.cmd = REQUEST_CAPABILITY;
690
691 if (netdev->flags & IFF_PROMISC) {
692 if (!adapter->promisc_supported)
693 return;
694 } else {
695 if (netdev->flags & IFF_ALLMULTI) {
696 /* Accept all multicast */
697 memset(&crq, 0, sizeof(crq));
698 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
699 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
700 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
701 ibmvnic_send_crq(adapter, &crq);
702 } else if (netdev_mc_empty(netdev)) {
703 /* Reject all multicast */
704 memset(&crq, 0, sizeof(crq));
705 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
706 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
707 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
708 ibmvnic_send_crq(adapter, &crq);
709 } else {
710 /* Accept one or more multicast(s) */
711 netdev_for_each_mc_addr(ha, netdev) {
712 memset(&crq, 0, sizeof(crq));
713 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
714 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
715 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
716 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
717 ha->addr);
718 ibmvnic_send_crq(adapter, &crq);
719 }
720 }
721 }
722}
723
724static int ibmvnic_set_mac(struct net_device *netdev, void *p)
725{
726 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
727 struct sockaddr *addr = p;
728 union ibmvnic_crq crq;
729
730 if (!is_valid_ether_addr(addr->sa_data))
731 return -EADDRNOTAVAIL;
732
733 memset(&crq, 0, sizeof(crq));
734 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
735 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
736 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
737 ibmvnic_send_crq(adapter, &crq);
738 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
739 return 0;
740}
741
742static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
743{
744 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
745
746 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
747 return -EINVAL;
748
749 netdev->mtu = new_mtu;
750 return 0;
751}
752
753static void ibmvnic_tx_timeout(struct net_device *dev)
754{
755 struct ibmvnic_adapter *adapter = netdev_priv(dev);
756 int rc;
757
758 /* Adapter timed out, resetting it */
759 release_sub_crqs(adapter);
760 rc = ibmvnic_reset_crq(adapter);
761 if (rc)
762 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
763 else
764 ibmvnic_send_crq_init(adapter);
765}
766
767static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
768 struct ibmvnic_rx_buff *rx_buff)
769{
770 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
771
772 rx_buff->skb = NULL;
773
774 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
775 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
776
777 atomic_dec(&pool->available);
778}
779
780static int ibmvnic_poll(struct napi_struct *napi, int budget)
781{
782 struct net_device *netdev = napi->dev;
783 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
784 int scrq_num = (int)(napi - adapter->napi);
785 int frames_processed = 0;
786restart_poll:
787 while (frames_processed < budget) {
788 struct sk_buff *skb;
789 struct ibmvnic_rx_buff *rx_buff;
790 union sub_crq *next;
791 u32 length;
792 u16 offset;
793 u8 flags = 0;
794
795 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
796 break;
797 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
798 rx_buff =
799 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
800 rx_comp.correlator);
801 /* do error checking */
802 if (next->rx_comp.rc) {
803 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
804 /* free the entry */
805 next->rx_comp.first = 0;
806 remove_buff_from_pool(adapter, rx_buff);
807 break;
808 }
809
810 length = be32_to_cpu(next->rx_comp.len);
811 offset = be16_to_cpu(next->rx_comp.off_frame_data);
812 flags = next->rx_comp.flags;
813 skb = rx_buff->skb;
814 skb_copy_to_linear_data(skb, rx_buff->data + offset,
815 length);
816 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
817 /* free the entry */
818 next->rx_comp.first = 0;
819 remove_buff_from_pool(adapter, rx_buff);
820
821 skb_put(skb, length);
822 skb->protocol = eth_type_trans(skb, netdev);
823
824 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
825 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
826 skb->ip_summed = CHECKSUM_UNNECESSARY;
827 }
828
829 length = skb->len;
830 napi_gro_receive(napi, skb); /* send it up */
831 netdev->stats.rx_packets++;
832 netdev->stats.rx_bytes += length;
833 frames_processed++;
834 }
835 replenish_pools(adapter);
836
837 if (frames_processed < budget) {
838 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
839 napi_complete(napi);
840 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
841 napi_reschedule(napi)) {
842 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
843 goto restart_poll;
844 }
845 }
846 return frames_processed;
847}
848
849#ifdef CONFIG_NET_POLL_CONTROLLER
850static void ibmvnic_netpoll_controller(struct net_device *dev)
851{
852 struct ibmvnic_adapter *adapter = netdev_priv(dev);
853 int i;
854
855 replenish_pools(netdev_priv(dev));
856 for (i = 0; i < adapter->req_rx_queues; i++)
857 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
858 adapter->rx_scrq[i]);
859}
860#endif
861
862static const struct net_device_ops ibmvnic_netdev_ops = {
863 .ndo_open = ibmvnic_open,
864 .ndo_stop = ibmvnic_close,
865 .ndo_start_xmit = ibmvnic_xmit,
866 .ndo_set_rx_mode = ibmvnic_set_multi,
867 .ndo_set_mac_address = ibmvnic_set_mac,
868 .ndo_validate_addr = eth_validate_addr,
869 .ndo_change_mtu = ibmvnic_change_mtu,
870 .ndo_tx_timeout = ibmvnic_tx_timeout,
871#ifdef CONFIG_NET_POLL_CONTROLLER
872 .ndo_poll_controller = ibmvnic_netpoll_controller,
873#endif
874};
875
876/* ethtool functions */
877
878static int ibmvnic_get_settings(struct net_device *netdev,
879 struct ethtool_cmd *cmd)
880{
881 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
882 SUPPORTED_FIBRE);
883 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
884 ADVERTISED_FIBRE);
885 ethtool_cmd_speed_set(cmd, SPEED_1000);
886 cmd->duplex = DUPLEX_FULL;
887 cmd->port = PORT_FIBRE;
888 cmd->phy_address = 0;
889 cmd->transceiver = XCVR_INTERNAL;
890 cmd->autoneg = AUTONEG_ENABLE;
891 cmd->maxtxpkt = 0;
892 cmd->maxrxpkt = 1;
893 return 0;
894}
895
896static void ibmvnic_get_drvinfo(struct net_device *dev,
897 struct ethtool_drvinfo *info)
898{
899 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
900 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
901}
902
903static u32 ibmvnic_get_msglevel(struct net_device *netdev)
904{
905 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
906
907 return adapter->msg_enable;
908}
909
910static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
911{
912 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
913
914 adapter->msg_enable = data;
915}
916
917static u32 ibmvnic_get_link(struct net_device *netdev)
918{
919 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
920
921 /* Don't need to send a query because we request a logical link up at
922 * init and then we wait for link state indications
923 */
924 return adapter->logical_link_state;
925}
926
927static void ibmvnic_get_ringparam(struct net_device *netdev,
928 struct ethtool_ringparam *ring)
929{
930 ring->rx_max_pending = 0;
931 ring->tx_max_pending = 0;
932 ring->rx_mini_max_pending = 0;
933 ring->rx_jumbo_max_pending = 0;
934 ring->rx_pending = 0;
935 ring->tx_pending = 0;
936 ring->rx_mini_pending = 0;
937 ring->rx_jumbo_pending = 0;
938}
939
940static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
941{
942 int i;
943
944 if (stringset != ETH_SS_STATS)
945 return;
946
947 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
948 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
949}
950
951static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
952{
953 switch (sset) {
954 case ETH_SS_STATS:
955 return ARRAY_SIZE(ibmvnic_stats);
956 default:
957 return -EOPNOTSUPP;
958 }
959}
960
961static void ibmvnic_get_ethtool_stats(struct net_device *dev,
962 struct ethtool_stats *stats, u64 *data)
963{
964 struct ibmvnic_adapter *adapter = netdev_priv(dev);
965 union ibmvnic_crq crq;
966 int i;
967
968 memset(&crq, 0, sizeof(crq));
969 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
970 crq.request_statistics.cmd = REQUEST_STATISTICS;
971 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
972 crq.request_statistics.len =
973 cpu_to_be32(sizeof(struct ibmvnic_statistics));
974 ibmvnic_send_crq(adapter, &crq);
975
976 /* Wait for data to be written */
977 init_completion(&adapter->stats_done);
978 wait_for_completion(&adapter->stats_done);
979
980 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
981 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
982}
983
984static const struct ethtool_ops ibmvnic_ethtool_ops = {
985 .get_settings = ibmvnic_get_settings,
986 .get_drvinfo = ibmvnic_get_drvinfo,
987 .get_msglevel = ibmvnic_get_msglevel,
988 .set_msglevel = ibmvnic_set_msglevel,
989 .get_link = ibmvnic_get_link,
990 .get_ringparam = ibmvnic_get_ringparam,
991 .get_strings = ibmvnic_get_strings,
992 .get_sset_count = ibmvnic_get_sset_count,
993 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
994};
995
996/* Routines for managing CRQs/sCRQs */
997
998static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
999 struct ibmvnic_sub_crq_queue *scrq)
1000{
1001 struct device *dev = &adapter->vdev->dev;
1002 long rc;
1003
1004 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1005
1006 /* Close the sub-crqs */
1007 do {
1008 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1009 adapter->vdev->unit_address,
1010 scrq->crq_num);
1011 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1012
1013 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1014 DMA_BIDIRECTIONAL);
1015 free_pages((unsigned long)scrq->msgs, 2);
1016 kfree(scrq);
1017}
1018
1019static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1020 *adapter)
1021{
1022 struct device *dev = &adapter->vdev->dev;
1023 struct ibmvnic_sub_crq_queue *scrq;
1024 int rc;
1025
1026 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1027 if (!scrq)
1028 return NULL;
1029
1030 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1031 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1032 if (!scrq->msgs) {
1033 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1034 goto zero_page_failed;
1035 }
1036
1037 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1038 DMA_BIDIRECTIONAL);
1039 if (dma_mapping_error(dev, scrq->msg_token)) {
1040 dev_warn(dev, "Couldn't map crq queue messages page\n");
1041 goto map_failed;
1042 }
1043
1044 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1045 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1046
1047 if (rc == H_RESOURCE)
1048 rc = ibmvnic_reset_crq(adapter);
1049
1050 if (rc == H_CLOSED) {
1051 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1052 } else if (rc) {
1053 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1054 goto reg_failed;
1055 }
1056
1057 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1058 if (scrq->irq == NO_IRQ) {
1059 dev_err(dev, "Error mapping irq\n");
1060 goto map_irq_failed;
1061 }
1062
1063 scrq->adapter = adapter;
1064 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1065 scrq->cur = 0;
1066 scrq->rx_skb_top = NULL;
1067 spin_lock_init(&scrq->lock);
1068
1069 netdev_dbg(adapter->netdev,
1070 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1071 scrq->crq_num, scrq->hw_irq, scrq->irq);
1072
1073 return scrq;
1074
1075map_irq_failed:
1076 do {
1077 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1078 adapter->vdev->unit_address,
1079 scrq->crq_num);
1080 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1081reg_failed:
1082 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1083 DMA_BIDIRECTIONAL);
1084map_failed:
1085 free_pages((unsigned long)scrq->msgs, 2);
1086zero_page_failed:
1087 kfree(scrq);
1088
1089 return NULL;
1090}
1091
1092static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1093{
1094 int i;
1095
1096 if (adapter->tx_scrq) {
1097 for (i = 0; i < adapter->req_tx_queues; i++)
1098 if (adapter->tx_scrq[i]) {
1099 free_irq(adapter->tx_scrq[i]->irq,
1100 adapter->tx_scrq[i]);
1101 release_sub_crq_queue(adapter,
1102 adapter->tx_scrq[i]);
1103 }
1104 adapter->tx_scrq = NULL;
1105 }
1106
1107 if (adapter->rx_scrq) {
1108 for (i = 0; i < adapter->req_rx_queues; i++)
1109 if (adapter->rx_scrq[i]) {
1110 free_irq(adapter->rx_scrq[i]->irq,
1111 adapter->rx_scrq[i]);
1112 release_sub_crq_queue(adapter,
1113 adapter->rx_scrq[i]);
1114 }
1115 adapter->rx_scrq = NULL;
1116 }
1117
1118 adapter->requested_caps = 0;
1119}
1120
1121static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1122 struct ibmvnic_sub_crq_queue *scrq)
1123{
1124 struct device *dev = &adapter->vdev->dev;
1125 unsigned long rc;
1126
1127 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1128 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1129 if (rc)
1130 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1131 scrq->hw_irq, rc);
1132 return rc;
1133}
1134
1135static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1136 struct ibmvnic_sub_crq_queue *scrq)
1137{
1138 struct device *dev = &adapter->vdev->dev;
1139 unsigned long rc;
1140
1141 if (scrq->hw_irq > 0x100000000ULL) {
1142 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1143 return 1;
1144 }
1145
1146 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1147 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1148 if (rc)
1149 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1150 scrq->hw_irq, rc);
1151 return rc;
1152}
1153
1154static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1155 struct ibmvnic_sub_crq_queue *scrq)
1156{
1157 struct device *dev = &adapter->vdev->dev;
1158 struct ibmvnic_tx_buff *txbuff;
1159 union sub_crq *next;
1160 int index;
1161 int i, j;
1162
1163restart_loop:
1164 while (pending_scrq(adapter, scrq)) {
1165 unsigned int pool = scrq->pool_index;
1166
1167 next = ibmvnic_next_scrq(adapter, scrq);
1168 for (i = 0; i < next->tx_comp.num_comps; i++) {
1169 if (next->tx_comp.rcs[i]) {
1170 dev_err(dev, "tx error %x\n",
1171 next->tx_comp.rcs[i]);
1172 continue;
1173 }
1174 index = be32_to_cpu(next->tx_comp.correlators[i]);
1175 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1176
1177 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1178 if (!txbuff->data_dma[j])
1179 continue;
1180
1181 txbuff->data_dma[j] = 0;
1182 txbuff->used_bounce = false;
1183 }
1184
1185 if (txbuff->last_frag)
1186 dev_kfree_skb_any(txbuff->skb);
1187
1188 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1189 producer_index] = index;
1190 adapter->tx_pool[pool].producer_index =
1191 (adapter->tx_pool[pool].producer_index + 1) %
1192 adapter->max_tx_entries_per_subcrq;
1193 }
1194 /* remove tx_comp scrq*/
1195 next->tx_comp.first = 0;
1196 }
1197
1198 enable_scrq_irq(adapter, scrq);
1199
1200 if (pending_scrq(adapter, scrq)) {
1201 disable_scrq_irq(adapter, scrq);
1202 goto restart_loop;
1203 }
1204
1205 return 0;
1206}
1207
1208static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1209{
1210 struct ibmvnic_sub_crq_queue *scrq = instance;
1211 struct ibmvnic_adapter *adapter = scrq->adapter;
1212
1213 disable_scrq_irq(adapter, scrq);
1214 ibmvnic_complete_tx(adapter, scrq);
1215
1216 return IRQ_HANDLED;
1217}
1218
1219static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1220{
1221 struct ibmvnic_sub_crq_queue *scrq = instance;
1222 struct ibmvnic_adapter *adapter = scrq->adapter;
1223
1224 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1225 disable_scrq_irq(adapter, scrq);
1226 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1227 }
1228
1229 return IRQ_HANDLED;
1230}
1231
1232static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1233{
1234 struct device *dev = &adapter->vdev->dev;
1235 struct ibmvnic_sub_crq_queue **allqueues;
1236 int registered_queues = 0;
1237 union ibmvnic_crq crq;
1238 int total_queues;
1239 int more = 0;
1240 int i, j;
1241 int rc;
1242
1243 if (!retry) {
1244 /* Sub-CRQ entries are 32 byte long */
1245 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1246
1247 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1248 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1249 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1250 goto allqueues_failed;
1251 }
1252
1253 /* Get the minimum between the queried max and the entries
1254 * that fit in our PAGE_SIZE
1255 */
1256 adapter->req_tx_entries_per_subcrq =
1257 adapter->max_tx_entries_per_subcrq > entries_page ?
1258 entries_page : adapter->max_tx_entries_per_subcrq;
1259 adapter->req_rx_add_entries_per_subcrq =
1260 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1261 entries_page : adapter->max_rx_add_entries_per_subcrq;
1262
1263 /* Choosing the maximum number of queues supported by firmware*/
1264 adapter->req_tx_queues = adapter->min_tx_queues;
1265 adapter->req_rx_queues = adapter->min_rx_queues;
1266 adapter->req_rx_add_queues = adapter->min_rx_add_queues;
1267
1268 adapter->req_mtu = adapter->max_mtu;
1269 }
1270
1271 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1272
1273 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1274 if (!allqueues)
1275 goto allqueues_failed;
1276
1277 for (i = 0; i < total_queues; i++) {
1278 allqueues[i] = init_sub_crq_queue(adapter);
1279 if (!allqueues[i]) {
1280 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1281 break;
1282 }
1283 registered_queues++;
1284 }
1285
1286 /* Make sure we were able to register the minimum number of queues */
1287 if (registered_queues <
1288 adapter->min_tx_queues + adapter->min_rx_queues) {
1289 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1290 goto tx_failed;
1291 }
1292
1293 /* Distribute the failed allocated queues*/
1294 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1295 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1296 switch (i % 3) {
1297 case 0:
1298 if (adapter->req_rx_queues > adapter->min_rx_queues)
1299 adapter->req_rx_queues--;
1300 else
1301 more++;
1302 break;
1303 case 1:
1304 if (adapter->req_tx_queues > adapter->min_tx_queues)
1305 adapter->req_tx_queues--;
1306 else
1307 more++;
1308 break;
1309 }
1310 }
1311
1312 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1313 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1314 if (!adapter->tx_scrq)
1315 goto tx_failed;
1316
1317 for (i = 0; i < adapter->req_tx_queues; i++) {
1318 adapter->tx_scrq[i] = allqueues[i];
1319 adapter->tx_scrq[i]->pool_index = i;
1320 rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx,
1321 0, "ibmvnic_tx", adapter->tx_scrq[i]);
1322 if (rc) {
1323 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1324 adapter->tx_scrq[i]->irq, rc);
1325 goto req_tx_irq_failed;
1326 }
1327 }
1328
1329 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1330 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1331 if (!adapter->rx_scrq)
1332 goto rx_failed;
1333
1334 for (i = 0; i < adapter->req_rx_queues; i++) {
1335 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1336 adapter->rx_scrq[i]->scrq_num = i;
1337 rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx,
1338 0, "ibmvnic_rx", adapter->rx_scrq[i]);
1339 if (rc) {
1340 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1341 adapter->rx_scrq[i]->irq, rc);
1342 goto req_rx_irq_failed;
1343 }
1344 }
1345
1346 memset(&crq, 0, sizeof(crq));
1347 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1348 crq.request_capability.cmd = REQUEST_CAPABILITY;
1349
1350 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1351 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1352 ibmvnic_send_crq(adapter, &crq);
1353
1354 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1355 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1356 ibmvnic_send_crq(adapter, &crq);
1357
1358 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1359 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1360 ibmvnic_send_crq(adapter, &crq);
1361
1362 crq.request_capability.capability =
1363 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1364 crq.request_capability.number =
1365 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1366 ibmvnic_send_crq(adapter, &crq);
1367
1368 crq.request_capability.capability =
1369 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1370 crq.request_capability.number =
1371 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1372 ibmvnic_send_crq(adapter, &crq);
1373
1374 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1375 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1376 ibmvnic_send_crq(adapter, &crq);
1377
1378 if (adapter->netdev->flags & IFF_PROMISC) {
1379 if (adapter->promisc_supported) {
1380 crq.request_capability.capability =
1381 cpu_to_be16(PROMISC_REQUESTED);
1382 crq.request_capability.number = cpu_to_be64(1);
1383 ibmvnic_send_crq(adapter, &crq);
1384 }
1385 } else {
1386 crq.request_capability.capability =
1387 cpu_to_be16(PROMISC_REQUESTED);
1388 crq.request_capability.number = cpu_to_be64(0);
1389 ibmvnic_send_crq(adapter, &crq);
1390 }
1391
1392 kfree(allqueues);
1393
1394 return;
1395
1396req_rx_irq_failed:
1397 for (j = 0; j < i; j++)
1398 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1399 i = adapter->req_tx_queues;
1400req_tx_irq_failed:
1401 for (j = 0; j < i; j++)
1402 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1403 kfree(adapter->rx_scrq);
1404 adapter->rx_scrq = NULL;
1405rx_failed:
1406 kfree(adapter->tx_scrq);
1407 adapter->tx_scrq = NULL;
1408tx_failed:
1409 for (i = 0; i < registered_queues; i++)
1410 release_sub_crq_queue(adapter, allqueues[i]);
1411 kfree(allqueues);
1412allqueues_failed:
1413 ibmvnic_remove(adapter->vdev);
1414}
1415
1416static int pending_scrq(struct ibmvnic_adapter *adapter,
1417 struct ibmvnic_sub_crq_queue *scrq)
1418{
1419 union sub_crq *entry = &scrq->msgs[scrq->cur];
1420
1421 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1422 return 1;
1423 else
1424 return 0;
1425}
1426
1427static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1428 struct ibmvnic_sub_crq_queue *scrq)
1429{
1430 union sub_crq *entry;
1431 unsigned long flags;
1432
1433 spin_lock_irqsave(&scrq->lock, flags);
1434 entry = &scrq->msgs[scrq->cur];
1435 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1436 if (++scrq->cur == scrq->size)
1437 scrq->cur = 0;
1438 } else {
1439 entry = NULL;
1440 }
1441 spin_unlock_irqrestore(&scrq->lock, flags);
1442
1443 return entry;
1444}
1445
1446static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1447{
1448 struct ibmvnic_crq_queue *queue = &adapter->crq;
1449 union ibmvnic_crq *crq;
1450
1451 crq = &queue->msgs[queue->cur];
1452 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1453 if (++queue->cur == queue->size)
1454 queue->cur = 0;
1455 } else {
1456 crq = NULL;
1457 }
1458
1459 return crq;
1460}
1461
1462static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1463 union sub_crq *sub_crq)
1464{
1465 unsigned int ua = adapter->vdev->unit_address;
1466 struct device *dev = &adapter->vdev->dev;
1467 u64 *u64_crq = (u64 *)sub_crq;
1468 int rc;
1469
1470 netdev_dbg(adapter->netdev,
1471 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1472 (unsigned long int)cpu_to_be64(remote_handle),
1473 (unsigned long int)cpu_to_be64(u64_crq[0]),
1474 (unsigned long int)cpu_to_be64(u64_crq[1]),
1475 (unsigned long int)cpu_to_be64(u64_crq[2]),
1476 (unsigned long int)cpu_to_be64(u64_crq[3]));
1477
1478 /* Make sure the hypervisor sees the complete request */
1479 mb();
1480
1481 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1482 cpu_to_be64(remote_handle),
1483 cpu_to_be64(u64_crq[0]),
1484 cpu_to_be64(u64_crq[1]),
1485 cpu_to_be64(u64_crq[2]),
1486 cpu_to_be64(u64_crq[3]));
1487
1488 if (rc) {
1489 if (rc == H_CLOSED)
1490 dev_warn(dev, "CRQ Queue closed\n");
1491 dev_err(dev, "Send error (rc=%d)\n", rc);
1492 }
1493
1494 return rc;
1495}
1496
1497static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1498 union ibmvnic_crq *crq)
1499{
1500 unsigned int ua = adapter->vdev->unit_address;
1501 struct device *dev = &adapter->vdev->dev;
1502 u64 *u64_crq = (u64 *)crq;
1503 int rc;
1504
1505 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1506 (unsigned long int)cpu_to_be64(u64_crq[0]),
1507 (unsigned long int)cpu_to_be64(u64_crq[1]));
1508
1509 /* Make sure the hypervisor sees the complete request */
1510 mb();
1511
1512 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1513 cpu_to_be64(u64_crq[0]),
1514 cpu_to_be64(u64_crq[1]));
1515
1516 if (rc) {
1517 if (rc == H_CLOSED)
1518 dev_warn(dev, "CRQ Queue closed\n");
1519 dev_warn(dev, "Send error (rc=%d)\n", rc);
1520 }
1521
1522 return rc;
1523}
1524
1525static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1526{
1527 union ibmvnic_crq crq;
1528
1529 memset(&crq, 0, sizeof(crq));
1530 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1531 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1532 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1533
1534 return ibmvnic_send_crq(adapter, &crq);
1535}
1536
1537static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1538{
1539 union ibmvnic_crq crq;
1540
1541 memset(&crq, 0, sizeof(crq));
1542 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1543 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1544 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1545
1546 return ibmvnic_send_crq(adapter, &crq);
1547}
1548
1549static int send_version_xchg(struct ibmvnic_adapter *adapter)
1550{
1551 union ibmvnic_crq crq;
1552
1553 memset(&crq, 0, sizeof(crq));
1554 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1555 crq.version_exchange.cmd = VERSION_EXCHANGE;
1556 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1557
1558 return ibmvnic_send_crq(adapter, &crq);
1559}
1560
1561static void send_login(struct ibmvnic_adapter *adapter)
1562{
1563 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1564 struct ibmvnic_login_buffer *login_buffer;
1565 struct ibmvnic_inflight_cmd *inflight_cmd;
1566 struct device *dev = &adapter->vdev->dev;
1567 dma_addr_t rsp_buffer_token;
1568 dma_addr_t buffer_token;
1569 size_t rsp_buffer_size;
1570 union ibmvnic_crq crq;
1571 unsigned long flags;
1572 size_t buffer_size;
1573 __be64 *tx_list_p;
1574 __be64 *rx_list_p;
1575 int i;
1576
1577 buffer_size =
1578 sizeof(struct ibmvnic_login_buffer) +
1579 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1580
1581 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1582 if (!login_buffer)
1583 goto buf_alloc_failed;
1584
1585 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1586 DMA_TO_DEVICE);
1587 if (dma_mapping_error(dev, buffer_token)) {
1588 dev_err(dev, "Couldn't map login buffer\n");
1589 goto buf_map_failed;
1590 }
1591
1592 rsp_buffer_size =
1593 sizeof(struct ibmvnic_login_rsp_buffer) +
1594 sizeof(u64) * (adapter->req_tx_queues +
1595 adapter->req_rx_queues *
1596 adapter->req_rx_add_queues + adapter->
1597 req_rx_add_queues) +
1598 sizeof(u8) * (IBMVNIC_TX_DESC_VERSIONS);
1599
1600 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1601 if (!login_rsp_buffer)
1602 goto buf_rsp_alloc_failed;
1603
1604 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1605 rsp_buffer_size, DMA_FROM_DEVICE);
1606 if (dma_mapping_error(dev, rsp_buffer_token)) {
1607 dev_err(dev, "Couldn't map login rsp buffer\n");
1608 goto buf_rsp_map_failed;
1609 }
1610 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1611 if (!inflight_cmd) {
1612 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1613 goto inflight_alloc_failed;
1614 }
1615 adapter->login_buf = login_buffer;
1616 adapter->login_buf_token = buffer_token;
1617 adapter->login_buf_sz = buffer_size;
1618 adapter->login_rsp_buf = login_rsp_buffer;
1619 adapter->login_rsp_buf_token = rsp_buffer_token;
1620 adapter->login_rsp_buf_sz = rsp_buffer_size;
1621
1622 login_buffer->len = cpu_to_be32(buffer_size);
1623 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1624 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1625 login_buffer->off_txcomp_subcrqs =
1626 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1627 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1628 login_buffer->off_rxcomp_subcrqs =
1629 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1630 sizeof(u64) * adapter->req_tx_queues);
1631 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1632 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1633
1634 tx_list_p = (__be64 *)((char *)login_buffer +
1635 sizeof(struct ibmvnic_login_buffer));
1636 rx_list_p = (__be64 *)((char *)login_buffer +
1637 sizeof(struct ibmvnic_login_buffer) +
1638 sizeof(u64) * adapter->req_tx_queues);
1639
1640 for (i = 0; i < adapter->req_tx_queues; i++) {
1641 if (adapter->tx_scrq[i]) {
1642 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1643 crq_num);
1644 }
1645 }
1646
1647 for (i = 0; i < adapter->req_rx_queues; i++) {
1648 if (adapter->rx_scrq[i]) {
1649 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1650 crq_num);
1651 }
1652 }
1653
1654 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1655 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1656 netdev_dbg(adapter->netdev, "%016lx\n",
1657 ((unsigned long int *)(adapter->login_buf))[i]);
1658 }
1659
1660 memset(&crq, 0, sizeof(crq));
1661 crq.login.first = IBMVNIC_CRQ_CMD;
1662 crq.login.cmd = LOGIN;
1663 crq.login.ioba = cpu_to_be32(buffer_token);
1664 crq.login.len = cpu_to_be32(buffer_size);
1665
1666 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1667
1668 spin_lock_irqsave(&adapter->inflight_lock, flags);
1669 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1670 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1671
1672 ibmvnic_send_crq(adapter, &crq);
1673
1674 return;
1675
1676inflight_alloc_failed:
1677 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1678 DMA_FROM_DEVICE);
1679buf_rsp_map_failed:
1680 kfree(login_rsp_buffer);
1681buf_rsp_alloc_failed:
1682 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1683buf_map_failed:
1684 kfree(login_buffer);
1685buf_alloc_failed:
1686 return;
1687}
1688
1689static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1690 u32 len, u8 map_id)
1691{
1692 union ibmvnic_crq crq;
1693
1694 memset(&crq, 0, sizeof(crq));
1695 crq.request_map.first = IBMVNIC_CRQ_CMD;
1696 crq.request_map.cmd = REQUEST_MAP;
1697 crq.request_map.map_id = map_id;
1698 crq.request_map.ioba = cpu_to_be32(addr);
1699 crq.request_map.len = cpu_to_be32(len);
1700 ibmvnic_send_crq(adapter, &crq);
1701}
1702
1703static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1704{
1705 union ibmvnic_crq crq;
1706
1707 memset(&crq, 0, sizeof(crq));
1708 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1709 crq.request_unmap.cmd = REQUEST_UNMAP;
1710 crq.request_unmap.map_id = map_id;
1711 ibmvnic_send_crq(adapter, &crq);
1712}
1713
1714static void send_map_query(struct ibmvnic_adapter *adapter)
1715{
1716 union ibmvnic_crq crq;
1717
1718 memset(&crq, 0, sizeof(crq));
1719 crq.query_map.first = IBMVNIC_CRQ_CMD;
1720 crq.query_map.cmd = QUERY_MAP;
1721 ibmvnic_send_crq(adapter, &crq);
1722}
1723
1724/* Send a series of CRQs requesting various capabilities of the VNIC server */
1725static void send_cap_queries(struct ibmvnic_adapter *adapter)
1726{
1727 union ibmvnic_crq crq;
1728
1729 atomic_set(&adapter->running_cap_queries, 0);
1730 memset(&crq, 0, sizeof(crq));
1731 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1732 crq.query_capability.cmd = QUERY_CAPABILITY;
1733
1734 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1735 atomic_inc(&adapter->running_cap_queries);
1736 ibmvnic_send_crq(adapter, &crq);
1737
1738 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1739 atomic_inc(&adapter->running_cap_queries);
1740 ibmvnic_send_crq(adapter, &crq);
1741
1742 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1743 atomic_inc(&adapter->running_cap_queries);
1744 ibmvnic_send_crq(adapter, &crq);
1745
1746 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1747 atomic_inc(&adapter->running_cap_queries);
1748 ibmvnic_send_crq(adapter, &crq);
1749
1750 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1751 atomic_inc(&adapter->running_cap_queries);
1752 ibmvnic_send_crq(adapter, &crq);
1753
1754 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1755 atomic_inc(&adapter->running_cap_queries);
1756 ibmvnic_send_crq(adapter, &crq);
1757
1758 crq.query_capability.capability =
1759 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1760 atomic_inc(&adapter->running_cap_queries);
1761 ibmvnic_send_crq(adapter, &crq);
1762
1763 crq.query_capability.capability =
1764 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1765 atomic_inc(&adapter->running_cap_queries);
1766 ibmvnic_send_crq(adapter, &crq);
1767
1768 crq.query_capability.capability =
1769 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1770 atomic_inc(&adapter->running_cap_queries);
1771 ibmvnic_send_crq(adapter, &crq);
1772
1773 crq.query_capability.capability =
1774 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
1775 atomic_inc(&adapter->running_cap_queries);
1776 ibmvnic_send_crq(adapter, &crq);
1777
1778 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
1779 atomic_inc(&adapter->running_cap_queries);
1780 ibmvnic_send_crq(adapter, &crq);
1781
1782 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
1783 atomic_inc(&adapter->running_cap_queries);
1784 ibmvnic_send_crq(adapter, &crq);
1785
1786 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
1787 atomic_inc(&adapter->running_cap_queries);
1788 ibmvnic_send_crq(adapter, &crq);
1789
1790 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
1791 atomic_inc(&adapter->running_cap_queries);
1792 ibmvnic_send_crq(adapter, &crq);
1793
1794 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
1795 atomic_inc(&adapter->running_cap_queries);
1796 ibmvnic_send_crq(adapter, &crq);
1797
1798 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
1799 atomic_inc(&adapter->running_cap_queries);
1800 ibmvnic_send_crq(adapter, &crq);
1801
1802 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
1803 atomic_inc(&adapter->running_cap_queries);
1804 ibmvnic_send_crq(adapter, &crq);
1805
1806 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
1807 atomic_inc(&adapter->running_cap_queries);
1808 ibmvnic_send_crq(adapter, &crq);
1809
1810 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
1811 atomic_inc(&adapter->running_cap_queries);
1812 ibmvnic_send_crq(adapter, &crq);
1813
1814 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
1815 atomic_inc(&adapter->running_cap_queries);
1816 ibmvnic_send_crq(adapter, &crq);
1817
1818 crq.query_capability.capability =
1819 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
1820 atomic_inc(&adapter->running_cap_queries);
1821 ibmvnic_send_crq(adapter, &crq);
1822
1823 crq.query_capability.capability =
1824 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
1825 atomic_inc(&adapter->running_cap_queries);
1826 ibmvnic_send_crq(adapter, &crq);
1827
1828 crq.query_capability.capability =
1829 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
1830 atomic_inc(&adapter->running_cap_queries);
1831 ibmvnic_send_crq(adapter, &crq);
1832
1833 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
1834 atomic_inc(&adapter->running_cap_queries);
1835 ibmvnic_send_crq(adapter, &crq);
1836}
1837
1838static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
1839{
1840 struct device *dev = &adapter->vdev->dev;
1841 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
1842 union ibmvnic_crq crq;
1843 int i;
1844
1845 dma_unmap_single(dev, adapter->ip_offload_tok,
1846 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
1847
1848 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
1849 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
1850 netdev_dbg(adapter->netdev, "%016lx\n",
1851 ((unsigned long int *)(buf))[i]);
1852
1853 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
1854 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
1855 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
1856 buf->tcp_ipv4_chksum);
1857 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
1858 buf->tcp_ipv6_chksum);
1859 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
1860 buf->udp_ipv4_chksum);
1861 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
1862 buf->udp_ipv6_chksum);
1863 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
1864 buf->large_tx_ipv4);
1865 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
1866 buf->large_tx_ipv6);
1867 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
1868 buf->large_rx_ipv4);
1869 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
1870 buf->large_rx_ipv6);
1871 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
1872 buf->max_ipv4_header_size);
1873 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
1874 buf->max_ipv6_header_size);
1875 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
1876 buf->max_tcp_header_size);
1877 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
1878 buf->max_udp_header_size);
1879 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
1880 buf->max_large_tx_size);
1881 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
1882 buf->max_large_rx_size);
1883 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
1884 buf->ipv6_extension_header);
1885 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
1886 buf->tcp_pseudosum_req);
1887 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
1888 buf->num_ipv6_ext_headers);
1889 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
1890 buf->off_ipv6_ext_headers);
1891
1892 adapter->ip_offload_ctrl_tok =
1893 dma_map_single(dev, &adapter->ip_offload_ctrl,
1894 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
1895
1896 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
1897 dev_err(dev, "Couldn't map ip offload control buffer\n");
1898 return;
1899 }
1900
1901 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
1902 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
1903 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
1904 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
1905 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
1906
1907 /* large_tx/rx disabled for now, additional features needed */
1908 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
1909 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
1910 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
1911 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
1912
1913 adapter->netdev->features = NETIF_F_GSO;
1914
1915 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
1916 adapter->netdev->features |= NETIF_F_IP_CSUM;
1917
1918 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
1919 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
1920
1921 memset(&crq, 0, sizeof(crq));
1922 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
1923 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
1924 crq.control_ip_offload.len =
1925 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
1926 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
1927 ibmvnic_send_crq(adapter, &crq);
1928}
1929
1930static void handle_error_info_rsp(union ibmvnic_crq *crq,
1931 struct ibmvnic_adapter *adapter)
1932{
1933 struct device *dev = &adapter->vdev->dev;
1934 struct ibmvnic_error_buff *error_buff;
1935 unsigned long flags;
1936 bool found = false;
1937 int i;
1938
1939 if (!crq->request_error_rsp.rc.code) {
1940 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
1941 crq->request_error_rsp.rc.code);
1942 return;
1943 }
1944
1945 spin_lock_irqsave(&adapter->error_list_lock, flags);
1946 list_for_each_entry(error_buff, &adapter->errors, list)
1947 if (error_buff->error_id == crq->request_error_rsp.error_id) {
1948 found = true;
1949 list_del(&error_buff->list);
1950 break;
1951 }
1952 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
1953
1954 if (!found) {
1955 dev_err(dev, "Couldn't find error id %x\n",
1956 crq->request_error_rsp.error_id);
1957 return;
1958 }
1959
1960 dev_err(dev, "Detailed info for error id %x:",
1961 crq->request_error_rsp.error_id);
1962
1963 for (i = 0; i < error_buff->len; i++) {
1964 pr_cont("%02x", (int)error_buff->buff[i]);
1965 if (i % 8 == 7)
1966 pr_cont(" ");
1967 }
1968 pr_cont("\n");
1969
1970 dma_unmap_single(dev, error_buff->dma, error_buff->len,
1971 DMA_FROM_DEVICE);
1972 kfree(error_buff->buff);
1973 kfree(error_buff);
1974}
1975
1976static void handle_dump_size_rsp(union ibmvnic_crq *crq,
1977 struct ibmvnic_adapter *adapter)
1978{
1979 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
1980 struct ibmvnic_inflight_cmd *inflight_cmd;
1981 struct device *dev = &adapter->vdev->dev;
1982 union ibmvnic_crq newcrq;
1983 unsigned long flags;
1984
1985 /* allocate and map buffer */
1986 adapter->dump_data = kmalloc(len, GFP_KERNEL);
1987 if (!adapter->dump_data) {
1988 complete(&adapter->fw_done);
1989 return;
1990 }
1991
1992 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
1993 DMA_FROM_DEVICE);
1994
1995 if (dma_mapping_error(dev, adapter->dump_data_token)) {
1996 if (!firmware_has_feature(FW_FEATURE_CMO))
1997 dev_err(dev, "Couldn't map dump data\n");
1998 kfree(adapter->dump_data);
1999 complete(&adapter->fw_done);
2000 return;
2001 }
2002
2003 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2004 if (!inflight_cmd) {
2005 dma_unmap_single(dev, adapter->dump_data_token, len,
2006 DMA_FROM_DEVICE);
2007 kfree(adapter->dump_data);
2008 complete(&adapter->fw_done);
2009 return;
2010 }
2011
2012 memset(&newcrq, 0, sizeof(newcrq));
2013 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2014 newcrq.request_dump.cmd = REQUEST_DUMP;
2015 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2016 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2017
2018 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2019
2020 spin_lock_irqsave(&adapter->inflight_lock, flags);
2021 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2022 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2023
2024 ibmvnic_send_crq(adapter, &newcrq);
2025}
2026
2027static void handle_error_indication(union ibmvnic_crq *crq,
2028 struct ibmvnic_adapter *adapter)
2029{
2030 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2031 struct ibmvnic_inflight_cmd *inflight_cmd;
2032 struct device *dev = &adapter->vdev->dev;
2033 struct ibmvnic_error_buff *error_buff;
2034 union ibmvnic_crq new_crq;
2035 unsigned long flags;
2036
2037 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2038 crq->error_indication.
2039 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2040 crq->error_indication.error_id,
2041 crq->error_indication.error_cause);
2042
2043 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2044 if (!error_buff)
2045 return;
2046
2047 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2048 if (!error_buff->buff) {
2049 kfree(error_buff);
2050 return;
2051 }
2052
2053 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2054 DMA_FROM_DEVICE);
2055 if (dma_mapping_error(dev, error_buff->dma)) {
2056 if (!firmware_has_feature(FW_FEATURE_CMO))
2057 dev_err(dev, "Couldn't map error buffer\n");
2058 kfree(error_buff->buff);
2059 kfree(error_buff);
2060 return;
2061 }
2062
2063 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2064 if (!inflight_cmd) {
2065 dma_unmap_single(dev, error_buff->dma, detail_len,
2066 DMA_FROM_DEVICE);
2067 kfree(error_buff->buff);
2068 kfree(error_buff);
2069 return;
2070 }
2071
2072 error_buff->len = detail_len;
2073 error_buff->error_id = crq->error_indication.error_id;
2074
2075 spin_lock_irqsave(&adapter->error_list_lock, flags);
2076 list_add_tail(&error_buff->list, &adapter->errors);
2077 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2078
2079 memset(&new_crq, 0, sizeof(new_crq));
2080 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2081 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2082 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2083 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2084 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2085
2086 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2087
2088 spin_lock_irqsave(&adapter->inflight_lock, flags);
2089 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2090 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2091
2092 ibmvnic_send_crq(adapter, &new_crq);
2093}
2094
2095static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2096 struct ibmvnic_adapter *adapter)
2097{
2098 struct net_device *netdev = adapter->netdev;
2099 struct device *dev = &adapter->vdev->dev;
2100 long rc;
2101
2102 rc = crq->change_mac_addr_rsp.rc.code;
2103 if (rc) {
2104 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2105 return;
2106 }
2107 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2108 ETH_ALEN);
2109}
2110
2111static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2112 struct ibmvnic_adapter *adapter)
2113{
2114 struct device *dev = &adapter->vdev->dev;
2115 u64 *req_value;
2116 char *name;
2117
2118 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2119 case REQ_TX_QUEUES:
2120 req_value = &adapter->req_tx_queues;
2121 name = "tx";
2122 break;
2123 case REQ_RX_QUEUES:
2124 req_value = &adapter->req_rx_queues;
2125 name = "rx";
2126 break;
2127 case REQ_RX_ADD_QUEUES:
2128 req_value = &adapter->req_rx_add_queues;
2129 name = "rx_add";
2130 break;
2131 case REQ_TX_ENTRIES_PER_SUBCRQ:
2132 req_value = &adapter->req_tx_entries_per_subcrq;
2133 name = "tx_entries_per_subcrq";
2134 break;
2135 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2136 req_value = &adapter->req_rx_add_entries_per_subcrq;
2137 name = "rx_add_entries_per_subcrq";
2138 break;
2139 case REQ_MTU:
2140 req_value = &adapter->req_mtu;
2141 name = "mtu";
2142 break;
2143 case PROMISC_REQUESTED:
2144 req_value = &adapter->promisc;
2145 name = "promisc";
2146 break;
2147 default:
2148 dev_err(dev, "Got invalid cap request rsp %d\n",
2149 crq->request_capability.capability);
2150 return;
2151 }
2152
2153 switch (crq->request_capability_rsp.rc.code) {
2154 case SUCCESS:
2155 break;
2156 case PARTIALSUCCESS:
2157 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2158 *req_value,
2159 (long int)be32_to_cpu(crq->request_capability_rsp.
2160 number), name);
2161 release_sub_crqs(adapter);
2162 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2163 complete(&adapter->init_done);
2164 return;
2165 default:
2166 dev_err(dev, "Error %d in request cap rsp\n",
2167 crq->request_capability_rsp.rc.code);
2168 return;
2169 }
2170
2171 /* Done receiving requested capabilities, query IP offload support */
2172 if (++adapter->requested_caps == 7) {
2173 union ibmvnic_crq newcrq;
2174 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2175 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2176 &adapter->ip_offload_buf;
2177
2178 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2179 buf_sz,
2180 DMA_FROM_DEVICE);
2181
2182 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2183 if (!firmware_has_feature(FW_FEATURE_CMO))
2184 dev_err(dev, "Couldn't map offload buffer\n");
2185 return;
2186 }
2187
2188 memset(&newcrq, 0, sizeof(newcrq));
2189 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2190 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2191 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2192 newcrq.query_ip_offload.ioba =
2193 cpu_to_be32(adapter->ip_offload_tok);
2194
2195 ibmvnic_send_crq(adapter, &newcrq);
2196 }
2197}
2198
2199static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2200 struct ibmvnic_adapter *adapter)
2201{
2202 struct device *dev = &adapter->vdev->dev;
2203 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2204 struct ibmvnic_login_buffer *login = adapter->login_buf;
2205 union ibmvnic_crq crq;
2206 int i;
2207
2208 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2209 DMA_BIDIRECTIONAL);
2210 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2211 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2212
2213 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2214 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2215 netdev_dbg(adapter->netdev, "%016lx\n",
2216 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2217 }
2218
2219 /* Sanity checks */
2220 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2221 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2222 adapter->req_rx_add_queues !=
2223 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2224 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2225 ibmvnic_remove(adapter->vdev);
2226 return -EIO;
2227 }
2228 complete(&adapter->init_done);
2229
2230 memset(&crq, 0, sizeof(crq));
2231 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2232 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2233 ibmvnic_send_crq(adapter, &crq);
2234
2235 return 0;
2236}
2237
2238static void handle_request_map_rsp(union ibmvnic_crq *crq,
2239 struct ibmvnic_adapter *adapter)
2240{
2241 struct device *dev = &adapter->vdev->dev;
2242 u8 map_id = crq->request_map_rsp.map_id;
2243 int tx_subcrqs;
2244 int rx_subcrqs;
2245 long rc;
2246 int i;
2247
2248 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2249 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2250
2251 rc = crq->request_map_rsp.rc.code;
2252 if (rc) {
2253 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2254 adapter->map_id--;
2255 /* need to find and zero tx/rx_pool map_id */
2256 for (i = 0; i < tx_subcrqs; i++) {
2257 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2258 adapter->tx_pool[i].long_term_buff.map_id = 0;
2259 }
2260 for (i = 0; i < rx_subcrqs; i++) {
2261 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2262 adapter->rx_pool[i].long_term_buff.map_id = 0;
2263 }
2264 }
2265 complete(&adapter->fw_done);
2266}
2267
2268static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2269 struct ibmvnic_adapter *adapter)
2270{
2271 struct device *dev = &adapter->vdev->dev;
2272 long rc;
2273
2274 rc = crq->request_unmap_rsp.rc.code;
2275 if (rc)
2276 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2277}
2278
2279static void handle_query_map_rsp(union ibmvnic_crq *crq,
2280 struct ibmvnic_adapter *adapter)
2281{
2282 struct net_device *netdev = adapter->netdev;
2283 struct device *dev = &adapter->vdev->dev;
2284 long rc;
2285
2286 rc = crq->query_map_rsp.rc.code;
2287 if (rc) {
2288 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2289 return;
2290 }
2291 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2292 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2293 crq->query_map_rsp.free_pages);
2294}
2295
2296static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2297 struct ibmvnic_adapter *adapter)
2298{
2299 struct net_device *netdev = adapter->netdev;
2300 struct device *dev = &adapter->vdev->dev;
2301 long rc;
2302
2303 atomic_dec(&adapter->running_cap_queries);
2304 netdev_dbg(netdev, "Outstanding queries: %d\n",
2305 atomic_read(&adapter->running_cap_queries));
2306 rc = crq->query_capability.rc.code;
2307 if (rc) {
2308 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2309 goto out;
2310 }
2311
2312 switch (be16_to_cpu(crq->query_capability.capability)) {
2313 case MIN_TX_QUEUES:
2314 adapter->min_tx_queues =
2315 be64_to_cpu(crq->query_capability.number);
2316 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2317 adapter->min_tx_queues);
2318 break;
2319 case MIN_RX_QUEUES:
2320 adapter->min_rx_queues =
2321 be64_to_cpu(crq->query_capability.number);
2322 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2323 adapter->min_rx_queues);
2324 break;
2325 case MIN_RX_ADD_QUEUES:
2326 adapter->min_rx_add_queues =
2327 be64_to_cpu(crq->query_capability.number);
2328 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2329 adapter->min_rx_add_queues);
2330 break;
2331 case MAX_TX_QUEUES:
2332 adapter->max_tx_queues =
2333 be64_to_cpu(crq->query_capability.number);
2334 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2335 adapter->max_tx_queues);
2336 break;
2337 case MAX_RX_QUEUES:
2338 adapter->max_rx_queues =
2339 be64_to_cpu(crq->query_capability.number);
2340 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2341 adapter->max_rx_queues);
2342 break;
2343 case MAX_RX_ADD_QUEUES:
2344 adapter->max_rx_add_queues =
2345 be64_to_cpu(crq->query_capability.number);
2346 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2347 adapter->max_rx_add_queues);
2348 break;
2349 case MIN_TX_ENTRIES_PER_SUBCRQ:
2350 adapter->min_tx_entries_per_subcrq =
2351 be64_to_cpu(crq->query_capability.number);
2352 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2353 adapter->min_tx_entries_per_subcrq);
2354 break;
2355 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2356 adapter->min_rx_add_entries_per_subcrq =
2357 be64_to_cpu(crq->query_capability.number);
2358 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2359 adapter->min_rx_add_entries_per_subcrq);
2360 break;
2361 case MAX_TX_ENTRIES_PER_SUBCRQ:
2362 adapter->max_tx_entries_per_subcrq =
2363 be64_to_cpu(crq->query_capability.number);
2364 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2365 adapter->max_tx_entries_per_subcrq);
2366 break;
2367 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2368 adapter->max_rx_add_entries_per_subcrq =
2369 be64_to_cpu(crq->query_capability.number);
2370 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2371 adapter->max_rx_add_entries_per_subcrq);
2372 break;
2373 case TCP_IP_OFFLOAD:
2374 adapter->tcp_ip_offload =
2375 be64_to_cpu(crq->query_capability.number);
2376 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2377 adapter->tcp_ip_offload);
2378 break;
2379 case PROMISC_SUPPORTED:
2380 adapter->promisc_supported =
2381 be64_to_cpu(crq->query_capability.number);
2382 netdev_dbg(netdev, "promisc_supported = %lld\n",
2383 adapter->promisc_supported);
2384 break;
2385 case MIN_MTU:
2386 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2387 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2388 break;
2389 case MAX_MTU:
2390 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2391 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2392 break;
2393 case MAX_MULTICAST_FILTERS:
2394 adapter->max_multicast_filters =
2395 be64_to_cpu(crq->query_capability.number);
2396 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2397 adapter->max_multicast_filters);
2398 break;
2399 case VLAN_HEADER_INSERTION:
2400 adapter->vlan_header_insertion =
2401 be64_to_cpu(crq->query_capability.number);
2402 if (adapter->vlan_header_insertion)
2403 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2404 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2405 adapter->vlan_header_insertion);
2406 break;
2407 case MAX_TX_SG_ENTRIES:
2408 adapter->max_tx_sg_entries =
2409 be64_to_cpu(crq->query_capability.number);
2410 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2411 adapter->max_tx_sg_entries);
2412 break;
2413 case RX_SG_SUPPORTED:
2414 adapter->rx_sg_supported =
2415 be64_to_cpu(crq->query_capability.number);
2416 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2417 adapter->rx_sg_supported);
2418 break;
2419 case OPT_TX_COMP_SUB_QUEUES:
2420 adapter->opt_tx_comp_sub_queues =
2421 be64_to_cpu(crq->query_capability.number);
2422 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2423 adapter->opt_tx_comp_sub_queues);
2424 break;
2425 case OPT_RX_COMP_QUEUES:
2426 adapter->opt_rx_comp_queues =
2427 be64_to_cpu(crq->query_capability.number);
2428 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2429 adapter->opt_rx_comp_queues);
2430 break;
2431 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2432 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2433 be64_to_cpu(crq->query_capability.number);
2434 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2435 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2436 break;
2437 case OPT_TX_ENTRIES_PER_SUBCRQ:
2438 adapter->opt_tx_entries_per_subcrq =
2439 be64_to_cpu(crq->query_capability.number);
2440 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2441 adapter->opt_tx_entries_per_subcrq);
2442 break;
2443 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2444 adapter->opt_rxba_entries_per_subcrq =
2445 be64_to_cpu(crq->query_capability.number);
2446 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2447 adapter->opt_rxba_entries_per_subcrq);
2448 break;
2449 case TX_RX_DESC_REQ:
2450 adapter->tx_rx_desc_req = crq->query_capability.number;
2451 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2452 adapter->tx_rx_desc_req);
2453 break;
2454
2455 default:
2456 netdev_err(netdev, "Got invalid cap rsp %d\n",
2457 crq->query_capability.capability);
2458 }
2459
2460out:
2461 if (atomic_read(&adapter->running_cap_queries) == 0)
2462 complete(&adapter->init_done);
2463 /* We're done querying the capabilities, initialize sub-crqs */
2464}
2465
2466static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2467 struct ibmvnic_adapter *adapter)
2468{
2469 u8 correlator = crq->control_ras_rsp.correlator;
2470 struct device *dev = &adapter->vdev->dev;
2471 bool found = false;
2472 int i;
2473
2474 if (crq->control_ras_rsp.rc.code) {
2475 dev_warn(dev, "Control ras failed rc=%d\n",
2476 crq->control_ras_rsp.rc.code);
2477 return;
2478 }
2479
2480 for (i = 0; i < adapter->ras_comp_num; i++) {
2481 if (adapter->ras_comps[i].correlator == correlator) {
2482 found = true;
2483 break;
2484 }
2485 }
2486
2487 if (!found) {
2488 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2489 return;
2490 }
2491
2492 switch (crq->control_ras_rsp.op) {
2493 case IBMVNIC_TRACE_LEVEL:
2494 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2495 break;
2496 case IBMVNIC_ERROR_LEVEL:
2497 adapter->ras_comps[i].error_check_level =
2498 crq->control_ras.level;
2499 break;
2500 case IBMVNIC_TRACE_PAUSE:
2501 adapter->ras_comp_int[i].paused = 1;
2502 break;
2503 case IBMVNIC_TRACE_RESUME:
2504 adapter->ras_comp_int[i].paused = 0;
2505 break;
2506 case IBMVNIC_TRACE_ON:
2507 adapter->ras_comps[i].trace_on = 1;
2508 break;
2509 case IBMVNIC_TRACE_OFF:
2510 adapter->ras_comps[i].trace_on = 0;
2511 break;
2512 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2513 /* trace_buff_sz is 3 bytes, stuff it into an int */
2514 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2515 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2516 crq->control_ras_rsp.trace_buff_sz[0];
2517 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2518 crq->control_ras_rsp.trace_buff_sz[1];
2519 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2520 crq->control_ras_rsp.trace_buff_sz[2];
2521 break;
2522 default:
2523 dev_err(dev, "invalid op %d on control_ras_rsp",
2524 crq->control_ras_rsp.op);
2525 }
2526}
2527
2528static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2529{
2530 file->private_data = inode->i_private;
2531 return 0;
2532}
2533
2534static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2535 loff_t *ppos)
2536{
2537 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2538 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2539 struct device *dev = &adapter->vdev->dev;
2540 struct ibmvnic_fw_trace_entry *trace;
2541 int num = ras_comp_int->num;
2542 union ibmvnic_crq crq;
2543 dma_addr_t trace_tok;
2544
2545 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2546 return 0;
2547
2548 trace =
2549 dma_alloc_coherent(dev,
2550 be32_to_cpu(adapter->ras_comps[num].
2551 trace_buff_size), &trace_tok,
2552 GFP_KERNEL);
2553 if (!trace) {
2554 dev_err(dev, "Couldn't alloc trace buffer\n");
2555 return 0;
2556 }
2557
2558 memset(&crq, 0, sizeof(crq));
2559 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2560 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2561 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2562 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2563 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2564 ibmvnic_send_crq(adapter, &crq);
2565
2566 init_completion(&adapter->fw_done);
2567 wait_for_completion(&adapter->fw_done);
2568
2569 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2570 len =
2571 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2572 *ppos;
2573
2574 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2575
2576 dma_free_coherent(dev,
2577 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2578 trace, trace_tok);
2579 *ppos += len;
2580 return len;
2581}
2582
2583static const struct file_operations trace_ops = {
2584 .owner = THIS_MODULE,
2585 .open = ibmvnic_fw_comp_open,
2586 .read = trace_read,
2587};
2588
2589static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2590 loff_t *ppos)
2591{
2592 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2593 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2594 int num = ras_comp_int->num;
2595 char buff[5]; /* 1 or 0 plus \n and \0 */
2596 int size;
2597
2598 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2599
2600 if (*ppos >= size)
2601 return 0;
2602
2603 copy_to_user(user_buf, buff, size);
2604 *ppos += size;
2605 return size;
2606}
2607
2608static ssize_t paused_write(struct file *file, const char __user *user_buf,
2609 size_t len, loff_t *ppos)
2610{
2611 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2612 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2613 int num = ras_comp_int->num;
2614 union ibmvnic_crq crq;
2615 unsigned long val;
2616 char buff[9]; /* decimal max int plus \n and \0 */
2617
2618 copy_from_user(buff, user_buf, sizeof(buff));
2619 val = kstrtoul(buff, 10, NULL);
2620
2621 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2622
2623 memset(&crq, 0, sizeof(crq));
2624 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2625 crq.control_ras.cmd = CONTROL_RAS;
2626 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2627 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2628 ibmvnic_send_crq(adapter, &crq);
2629
2630 return len;
2631}
2632
2633static const struct file_operations paused_ops = {
2634 .owner = THIS_MODULE,
2635 .open = ibmvnic_fw_comp_open,
2636 .read = paused_read,
2637 .write = paused_write,
2638};
2639
2640static ssize_t tracing_read(struct file *file, char __user *user_buf,
2641 size_t len, loff_t *ppos)
2642{
2643 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2644 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2645 int num = ras_comp_int->num;
2646 char buff[5]; /* 1 or 0 plus \n and \0 */
2647 int size;
2648
2649 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2650
2651 if (*ppos >= size)
2652 return 0;
2653
2654 copy_to_user(user_buf, buff, size);
2655 *ppos += size;
2656 return size;
2657}
2658
2659static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2660 size_t len, loff_t *ppos)
2661{
2662 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2663 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2664 int num = ras_comp_int->num;
2665 union ibmvnic_crq crq;
2666 unsigned long val;
2667 char buff[9]; /* decimal max int plus \n and \0 */
2668
2669 copy_from_user(buff, user_buf, sizeof(buff));
2670 val = kstrtoul(buff, 10, NULL);
2671
2672 memset(&crq, 0, sizeof(crq));
2673 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2674 crq.control_ras.cmd = CONTROL_RAS;
2675 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2676 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2677
2678 return len;
2679}
2680
2681static const struct file_operations tracing_ops = {
2682 .owner = THIS_MODULE,
2683 .open = ibmvnic_fw_comp_open,
2684 .read = tracing_read,
2685 .write = tracing_write,
2686};
2687
2688static ssize_t error_level_read(struct file *file, char __user *user_buf,
2689 size_t len, loff_t *ppos)
2690{
2691 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2692 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2693 int num = ras_comp_int->num;
2694 char buff[5]; /* decimal max char plus \n and \0 */
2695 int size;
2696
2697 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2698
2699 if (*ppos >= size)
2700 return 0;
2701
2702 copy_to_user(user_buf, buff, size);
2703 *ppos += size;
2704 return size;
2705}
2706
2707static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2708 size_t len, loff_t *ppos)
2709{
2710 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2711 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2712 int num = ras_comp_int->num;
2713 union ibmvnic_crq crq;
2714 unsigned long val;
2715 char buff[9]; /* decimal max int plus \n and \0 */
2716
2717 copy_from_user(buff, user_buf, sizeof(buff));
2718 val = kstrtoul(buff, 10, NULL);
2719
2720 if (val > 9)
2721 val = 9;
2722
2723 memset(&crq, 0, sizeof(crq));
2724 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2725 crq.control_ras.cmd = CONTROL_RAS;
2726 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2727 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2728 crq.control_ras.level = val;
2729 ibmvnic_send_crq(adapter, &crq);
2730
2731 return len;
2732}
2733
2734static const struct file_operations error_level_ops = {
2735 .owner = THIS_MODULE,
2736 .open = ibmvnic_fw_comp_open,
2737 .read = error_level_read,
2738 .write = error_level_write,
2739};
2740
2741static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2742 size_t len, loff_t *ppos)
2743{
2744 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2745 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2746 int num = ras_comp_int->num;
2747 char buff[5]; /* decimal max char plus \n and \0 */
2748 int size;
2749
2750 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2751 if (*ppos >= size)
2752 return 0;
2753
2754 copy_to_user(user_buf, buff, size);
2755 *ppos += size;
2756 return size;
2757}
2758
2759static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2760 size_t len, loff_t *ppos)
2761{
2762 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2763 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2764 union ibmvnic_crq crq;
2765 unsigned long val;
2766 char buff[9]; /* decimal max int plus \n and \0 */
2767
2768 copy_from_user(buff, user_buf, sizeof(buff));
2769 val = kstrtoul(buff, 10, NULL);
2770 if (val > 9)
2771 val = 9;
2772
2773 memset(&crq, 0, sizeof(crq));
2774 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2775 crq.control_ras.cmd = CONTROL_RAS;
2776 crq.control_ras.correlator =
2777 adapter->ras_comps[ras_comp_int->num].correlator;
2778 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
2779 crq.control_ras.level = val;
2780 ibmvnic_send_crq(adapter, &crq);
2781
2782 return len;
2783}
2784
2785static const struct file_operations trace_level_ops = {
2786 .owner = THIS_MODULE,
2787 .open = ibmvnic_fw_comp_open,
2788 .read = trace_level_read,
2789 .write = trace_level_write,
2790};
2791
2792static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
2793 size_t len, loff_t *ppos)
2794{
2795 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2796 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2797 int num = ras_comp_int->num;
2798 char buff[9]; /* decimal max int plus \n and \0 */
2799 int size;
2800
2801 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
2802 if (*ppos >= size)
2803 return 0;
2804
2805 copy_to_user(user_buf, buff, size);
2806 *ppos += size;
2807 return size;
2808}
2809
2810static ssize_t trace_buff_size_write(struct file *file,
2811 const char __user *user_buf, size_t len,
2812 loff_t *ppos)
2813{
2814 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2815 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2816 union ibmvnic_crq crq;
2817 unsigned long val;
2818 char buff[9]; /* decimal max int plus \n and \0 */
2819
2820 copy_from_user(buff, user_buf, sizeof(buff));
2821 val = kstrtoul(buff, 10, NULL);
2822
2823 memset(&crq, 0, sizeof(crq));
2824 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2825 crq.control_ras.cmd = CONTROL_RAS;
2826 crq.control_ras.correlator =
2827 adapter->ras_comps[ras_comp_int->num].correlator;
2828 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
2829 /* trace_buff_sz is 3 bytes, stuff an int into it */
2830 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
2831 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
2832 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
2833 ibmvnic_send_crq(adapter, &crq);
2834
2835 return len;
2836}
2837
2838static const struct file_operations trace_size_ops = {
2839 .owner = THIS_MODULE,
2840 .open = ibmvnic_fw_comp_open,
2841 .read = trace_buff_size_read,
2842 .write = trace_buff_size_write,
2843};
2844
2845static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
2846 struct ibmvnic_adapter *adapter)
2847{
2848 struct device *dev = &adapter->vdev->dev;
2849 struct dentry *dir_ent;
2850 struct dentry *ent;
2851 int i;
2852
2853 debugfs_remove_recursive(adapter->ras_comps_ent);
2854
2855 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
2856 adapter->debugfs_dir);
2857 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
2858 dev_info(dev, "debugfs create ras_comps dir failed\n");
2859 return;
2860 }
2861
2862 for (i = 0; i < adapter->ras_comp_num; i++) {
2863 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
2864 adapter->ras_comps_ent);
2865 if (!dir_ent || IS_ERR(dir_ent)) {
2866 dev_info(dev, "debugfs create %s dir failed\n",
2867 adapter->ras_comps[i].name);
2868 continue;
2869 }
2870
2871 adapter->ras_comp_int[i].adapter = adapter;
2872 adapter->ras_comp_int[i].num = i;
2873 adapter->ras_comp_int[i].desc_blob.data =
2874 &adapter->ras_comps[i].description;
2875 adapter->ras_comp_int[i].desc_blob.size =
2876 sizeof(adapter->ras_comps[i].description);
2877
2878 /* Don't need to remember the dentry's because the debugfs dir
2879 * gets removed recursively
2880 */
2881 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
2882 &adapter->ras_comp_int[i].desc_blob);
2883 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
2884 dir_ent, &adapter->ras_comp_int[i],
2885 &trace_size_ops);
2886 ent = debugfs_create_file("trace_level",
2887 S_IRUGO |
2888 (adapter->ras_comps[i].trace_level !=
2889 0xFF ? S_IWUSR : 0),
2890 dir_ent, &adapter->ras_comp_int[i],
2891 &trace_level_ops);
2892 ent = debugfs_create_file("error_level",
2893 S_IRUGO |
2894 (adapter->
2895 ras_comps[i].error_check_level !=
2896 0xFF ? S_IWUSR : 0),
2897 dir_ent, &adapter->ras_comp_int[i],
2898 &trace_level_ops);
2899 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
2900 dir_ent, &adapter->ras_comp_int[i],
2901 &tracing_ops);
2902 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
2903 dir_ent, &adapter->ras_comp_int[i],
2904 &paused_ops);
2905 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
2906 &adapter->ras_comp_int[i],
2907 &trace_ops);
2908 }
2909}
2910
2911static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
2912 struct ibmvnic_adapter *adapter)
2913{
2914 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
2915 struct device *dev = &adapter->vdev->dev;
2916 union ibmvnic_crq newcrq;
2917
2918 adapter->ras_comps = dma_alloc_coherent(dev, len,
2919 &adapter->ras_comps_tok,
2920 GFP_KERNEL);
2921 if (!adapter->ras_comps) {
2922 if (!firmware_has_feature(FW_FEATURE_CMO))
2923 dev_err(dev, "Couldn't alloc fw comps buffer\n");
2924 return;
2925 }
2926
2927 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
2928 sizeof(struct ibmvnic_fw_comp_internal),
2929 GFP_KERNEL);
2930 if (!adapter->ras_comp_int)
2931 dma_free_coherent(dev, len, adapter->ras_comps,
2932 adapter->ras_comps_tok);
2933
2934 memset(&newcrq, 0, sizeof(newcrq));
2935 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
2936 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
2937 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
2938 newcrq.request_ras_comps.len = cpu_to_be32(len);
2939 ibmvnic_send_crq(adapter, &newcrq);
2940}
2941
2942static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
2943{
2944 struct ibmvnic_inflight_cmd *inflight_cmd;
2945 struct device *dev = &adapter->vdev->dev;
2946 struct ibmvnic_error_buff *error_buff;
2947 unsigned long flags;
2948 unsigned long flags2;
2949
2950 spin_lock_irqsave(&adapter->inflight_lock, flags);
2951 list_for_each_entry(inflight_cmd, &adapter->inflight, list) {
2952 switch (inflight_cmd->crq.generic.cmd) {
2953 case LOGIN:
2954 dma_unmap_single(dev, adapter->login_buf_token,
2955 adapter->login_buf_sz,
2956 DMA_BIDIRECTIONAL);
2957 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2958 adapter->login_rsp_buf_sz,
2959 DMA_BIDIRECTIONAL);
2960 kfree(adapter->login_rsp_buf);
2961 kfree(adapter->login_buf);
2962 break;
2963 case REQUEST_DUMP:
2964 complete(&adapter->fw_done);
2965 break;
2966 case REQUEST_ERROR_INFO:
2967 spin_lock_irqsave(&adapter->error_list_lock, flags2);
2968 list_for_each_entry(error_buff, &adapter->errors,
2969 list) {
2970 dma_unmap_single(dev, error_buff->dma,
2971 error_buff->len,
2972 DMA_FROM_DEVICE);
2973 kfree(error_buff->buff);
2974 list_del(&error_buff->list);
2975 kfree(error_buff);
2976 }
2977 spin_unlock_irqrestore(&adapter->error_list_lock,
2978 flags2);
2979 break;
2980 }
2981 list_del(&inflight_cmd->list);
2982 kfree(inflight_cmd);
2983 }
2984 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2985}
2986
2987static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2988 struct ibmvnic_adapter *adapter)
2989{
2990 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2991 struct net_device *netdev = adapter->netdev;
2992 struct device *dev = &adapter->vdev->dev;
2993 long rc;
2994
2995 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
2996 ((unsigned long int *)crq)[0],
2997 ((unsigned long int *)crq)[1]);
2998 switch (gen_crq->first) {
2999 case IBMVNIC_CRQ_INIT_RSP:
3000 switch (gen_crq->cmd) {
3001 case IBMVNIC_CRQ_INIT:
3002 dev_info(dev, "Partner initialized\n");
3003 /* Send back a response */
3004 rc = ibmvnic_send_crq_init_complete(adapter);
3005 if (rc == 0)
3006 send_version_xchg(adapter);
3007 else
3008 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3009 break;
3010 case IBMVNIC_CRQ_INIT_COMPLETE:
3011 dev_info(dev, "Partner initialization complete\n");
3012 send_version_xchg(adapter);
3013 break;
3014 default:
3015 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3016 }
3017 return;
3018 case IBMVNIC_CRQ_XPORT_EVENT:
3019 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3020 dev_info(dev, "Re-enabling adapter\n");
3021 adapter->migrated = true;
3022 ibmvnic_free_inflight(adapter);
3023 release_sub_crqs(adapter);
3024 rc = ibmvnic_reenable_crq_queue(adapter);
3025 if (rc)
3026 dev_err(dev, "Error after enable rc=%ld\n", rc);
3027 adapter->migrated = false;
3028 rc = ibmvnic_send_crq_init(adapter);
3029 if (rc)
3030 dev_err(dev, "Error sending init rc=%ld\n", rc);
3031 } else {
3032 /* The adapter lost the connection */
3033 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3034 gen_crq->cmd);
3035 ibmvnic_free_inflight(adapter);
3036 release_sub_crqs(adapter);
3037 }
3038 return;
3039 case IBMVNIC_CRQ_CMD_RSP:
3040 break;
3041 default:
3042 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3043 gen_crq->first);
3044 return;
3045 }
3046
3047 switch (gen_crq->cmd) {
3048 case VERSION_EXCHANGE_RSP:
3049 rc = crq->version_exchange_rsp.rc.code;
3050 if (rc) {
3051 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3052 break;
3053 }
3054 dev_info(dev, "Partner protocol version is %d\n",
3055 crq->version_exchange_rsp.version);
3056 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3057 ibmvnic_version)
3058 ibmvnic_version =
3059 be16_to_cpu(crq->version_exchange_rsp.version);
3060 send_cap_queries(adapter);
3061 break;
3062 case QUERY_CAPABILITY_RSP:
3063 handle_query_cap_rsp(crq, adapter);
3064 break;
3065 case QUERY_MAP_RSP:
3066 handle_query_map_rsp(crq, adapter);
3067 break;
3068 case REQUEST_MAP_RSP:
3069 handle_request_map_rsp(crq, adapter);
3070 break;
3071 case REQUEST_UNMAP_RSP:
3072 handle_request_unmap_rsp(crq, adapter);
3073 break;
3074 case REQUEST_CAPABILITY_RSP:
3075 handle_request_cap_rsp(crq, adapter);
3076 break;
3077 case LOGIN_RSP:
3078 netdev_dbg(netdev, "Got Login Response\n");
3079 handle_login_rsp(crq, adapter);
3080 break;
3081 case LOGICAL_LINK_STATE_RSP:
3082 netdev_dbg(netdev, "Got Logical Link State Response\n");
3083 adapter->logical_link_state =
3084 crq->logical_link_state_rsp.link_state;
3085 break;
3086 case LINK_STATE_INDICATION:
3087 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3088 adapter->phys_link_state =
3089 crq->link_state_indication.phys_link_state;
3090 adapter->logical_link_state =
3091 crq->link_state_indication.logical_link_state;
3092 break;
3093 case CHANGE_MAC_ADDR_RSP:
3094 netdev_dbg(netdev, "Got MAC address change Response\n");
3095 handle_change_mac_rsp(crq, adapter);
3096 break;
3097 case ERROR_INDICATION:
3098 netdev_dbg(netdev, "Got Error Indication\n");
3099 handle_error_indication(crq, adapter);
3100 break;
3101 case REQUEST_ERROR_RSP:
3102 netdev_dbg(netdev, "Got Error Detail Response\n");
3103 handle_error_info_rsp(crq, adapter);
3104 break;
3105 case REQUEST_STATISTICS_RSP:
3106 netdev_dbg(netdev, "Got Statistics Response\n");
3107 complete(&adapter->stats_done);
3108 break;
3109 case REQUEST_DUMP_SIZE_RSP:
3110 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3111 handle_dump_size_rsp(crq, adapter);
3112 break;
3113 case REQUEST_DUMP_RSP:
3114 netdev_dbg(netdev, "Got Request Dump Response\n");
3115 complete(&adapter->fw_done);
3116 break;
3117 case QUERY_IP_OFFLOAD_RSP:
3118 netdev_dbg(netdev, "Got Query IP offload Response\n");
3119 handle_query_ip_offload_rsp(adapter);
3120 break;
3121 case MULTICAST_CTRL_RSP:
3122 netdev_dbg(netdev, "Got multicast control Response\n");
3123 break;
3124 case CONTROL_IP_OFFLOAD_RSP:
3125 netdev_dbg(netdev, "Got Control IP offload Response\n");
3126 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3127 sizeof(adapter->ip_offload_ctrl),
3128 DMA_TO_DEVICE);
3129 /* We're done with the queries, perform the login */
3130 send_login(adapter);
3131 break;
3132 case REQUEST_RAS_COMP_NUM_RSP:
3133 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3134 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3135 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3136 break;
3137 }
3138 adapter->ras_comp_num =
3139 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3140 handle_request_ras_comp_num_rsp(crq, adapter);
3141 break;
3142 case REQUEST_RAS_COMPS_RSP:
3143 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3144 handle_request_ras_comps_rsp(crq, adapter);
3145 break;
3146 case CONTROL_RAS_RSP:
3147 netdev_dbg(netdev, "Got Control RAS Response\n");
3148 handle_control_ras_rsp(crq, adapter);
3149 break;
3150 case COLLECT_FW_TRACE_RSP:
3151 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3152 complete(&adapter->fw_done);
3153 break;
3154 default:
3155 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3156 gen_crq->cmd);
3157 }
3158}
3159
3160static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3161{
3162 struct ibmvnic_adapter *adapter = instance;
3163 struct ibmvnic_crq_queue *queue = &adapter->crq;
3164 struct vio_dev *vdev = adapter->vdev;
3165 union ibmvnic_crq *crq;
3166 unsigned long flags;
3167 bool done = false;
3168
3169 spin_lock_irqsave(&queue->lock, flags);
3170 vio_disable_interrupts(vdev);
3171 while (!done) {
3172 /* Pull all the valid messages off the CRQ */
3173 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3174 ibmvnic_handle_crq(crq, adapter);
3175 crq->generic.first = 0;
3176 }
3177 vio_enable_interrupts(vdev);
3178 crq = ibmvnic_next_crq(adapter);
3179 if (crq) {
3180 vio_disable_interrupts(vdev);
3181 ibmvnic_handle_crq(crq, adapter);
3182 crq->generic.first = 0;
3183 } else {
3184 done = true;
3185 }
3186 }
3187 spin_unlock_irqrestore(&queue->lock, flags);
3188 return IRQ_HANDLED;
3189}
3190
3191static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3192{
3193 struct vio_dev *vdev = adapter->vdev;
3194 int rc;
3195
3196 do {
3197 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3198 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3199
3200 if (rc)
3201 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3202
3203 return rc;
3204}
3205
3206static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3207{
3208 struct ibmvnic_crq_queue *crq = &adapter->crq;
3209 struct device *dev = &adapter->vdev->dev;
3210 struct vio_dev *vdev = adapter->vdev;
3211 int rc;
3212
3213 /* Close the CRQ */
3214 do {
3215 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3216 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3217
3218 /* Clean out the queue */
3219 memset(crq->msgs, 0, PAGE_SIZE);
3220 crq->cur = 0;
3221
3222 /* And re-open it again */
3223 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3224 crq->msg_token, PAGE_SIZE);
3225
3226 if (rc == H_CLOSED)
3227 /* Adapter is good, but other end is not ready */
3228 dev_warn(dev, "Partner adapter not ready\n");
3229 else if (rc != 0)
3230 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3231
3232 return rc;
3233}
3234
3235static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3236{
3237 struct ibmvnic_crq_queue *crq = &adapter->crq;
3238 struct vio_dev *vdev = adapter->vdev;
3239 long rc;
3240
3241 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3242 free_irq(vdev->irq, adapter);
3243 do {
3244 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3245 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3246
3247 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3248 DMA_BIDIRECTIONAL);
3249 free_page((unsigned long)crq->msgs);
3250}
3251
3252static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3253{
3254 struct ibmvnic_crq_queue *crq = &adapter->crq;
3255 struct device *dev = &adapter->vdev->dev;
3256 struct vio_dev *vdev = adapter->vdev;
3257 int rc, retrc = -ENOMEM;
3258
3259 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3260 /* Should we allocate more than one page? */
3261
3262 if (!crq->msgs)
3263 return -ENOMEM;
3264
3265 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3266 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3267 DMA_BIDIRECTIONAL);
3268 if (dma_mapping_error(dev, crq->msg_token))
3269 goto map_failed;
3270
3271 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3272 crq->msg_token, PAGE_SIZE);
3273
3274 if (rc == H_RESOURCE)
3275 /* maybe kexecing and resource is busy. try a reset */
3276 rc = ibmvnic_reset_crq(adapter);
3277 retrc = rc;
3278
3279 if (rc == H_CLOSED) {
3280 dev_warn(dev, "Partner adapter not ready\n");
3281 } else if (rc) {
3282 dev_warn(dev, "Error %d opening adapter\n", rc);
3283 goto reg_crq_failed;
3284 }
3285
3286 retrc = 0;
3287
3288 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3289 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3290 adapter);
3291 if (rc) {
3292 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3293 vdev->irq, rc);
3294 goto req_irq_failed;
3295 }
3296
3297 rc = vio_enable_interrupts(vdev);
3298 if (rc) {
3299 dev_err(dev, "Error %d enabling interrupts\n", rc);
3300 goto req_irq_failed;
3301 }
3302
3303 crq->cur = 0;
3304 spin_lock_init(&crq->lock);
3305
3306 return retrc;
3307
3308req_irq_failed:
3309 do {
3310 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3311 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3312reg_crq_failed:
3313 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3314map_failed:
3315 free_page((unsigned long)crq->msgs);
3316 return retrc;
3317}
3318
3319/* debugfs for dump */
3320static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3321{
3322 struct net_device *netdev = seq->private;
3323 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3324 struct device *dev = &adapter->vdev->dev;
3325 union ibmvnic_crq crq;
3326
3327 memset(&crq, 0, sizeof(crq));
3328 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3329 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3330 ibmvnic_send_crq(adapter, &crq);
3331
3332 init_completion(&adapter->fw_done);
3333 wait_for_completion(&adapter->fw_done);
3334
3335 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3336
3337 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3338 DMA_BIDIRECTIONAL);
3339
3340 kfree(adapter->dump_data);
3341
3342 return 0;
3343}
3344
3345static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3346{
3347 return single_open(file, ibmvnic_dump_show, inode->i_private);
3348}
3349
3350static const struct file_operations ibmvnic_dump_ops = {
3351 .owner = THIS_MODULE,
3352 .open = ibmvnic_dump_open,
3353 .read = seq_read,
3354 .llseek = seq_lseek,
3355 .release = single_release,
3356};
3357
3358static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3359{
3360 struct ibmvnic_adapter *adapter;
3361 struct net_device *netdev;
3362 unsigned char *mac_addr_p;
3363 struct dentry *ent;
3364 char buf[16]; /* debugfs name buf */
3365 int rc;
3366
3367 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3368 dev->unit_address);
3369
3370 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3371 VETH_MAC_ADDR, NULL);
3372 if (!mac_addr_p) {
3373 dev_err(&dev->dev,
3374 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3375 __FILE__, __LINE__);
3376 return 0;
3377 }
3378
3379 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3380 IBMVNIC_MAX_TX_QUEUES);
3381 if (!netdev)
3382 return -ENOMEM;
3383
3384 adapter = netdev_priv(netdev);
3385 dev_set_drvdata(&dev->dev, netdev);
3386 adapter->vdev = dev;
3387 adapter->netdev = netdev;
3388
3389 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3390 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3391 netdev->irq = dev->irq;
3392 netdev->netdev_ops = &ibmvnic_netdev_ops;
3393 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3394 SET_NETDEV_DEV(netdev, &dev->dev);
3395
3396 spin_lock_init(&adapter->stats_lock);
3397
3398 rc = ibmvnic_init_crq_queue(adapter);
3399 if (rc) {
3400 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3401 goto free_netdev;
3402 }
3403
3404 INIT_LIST_HEAD(&adapter->errors);
3405 INIT_LIST_HEAD(&adapter->inflight);
3406 spin_lock_init(&adapter->error_list_lock);
3407 spin_lock_init(&adapter->inflight_lock);
3408
3409 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3410 sizeof(struct ibmvnic_statistics),
3411 DMA_FROM_DEVICE);
3412 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3413 if (!firmware_has_feature(FW_FEATURE_CMO))
3414 dev_err(&dev->dev, "Couldn't map stats buffer\n");
3415 goto free_crq;
3416 }
3417
3418 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3419 ent = debugfs_create_dir(buf, NULL);
3420 if (!ent || IS_ERR(ent)) {
3421 dev_info(&dev->dev, "debugfs create directory failed\n");
3422 adapter->debugfs_dir = NULL;
3423 } else {
3424 adapter->debugfs_dir = ent;
3425 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3426 netdev, &ibmvnic_dump_ops);
3427 if (!ent || IS_ERR(ent)) {
3428 dev_info(&dev->dev,
3429 "debugfs create dump file failed\n");
3430 adapter->debugfs_dump = NULL;
3431 } else {
3432 adapter->debugfs_dump = ent;
3433 }
3434 }
3435 ibmvnic_send_crq_init(adapter);
3436
3437 init_completion(&adapter->init_done);
3438 wait_for_completion(&adapter->init_done);
3439
3440 /* needed to pull init_sub_crqs outside of an interrupt context
3441 * because it creates IRQ mappings for the subCRQ queues, causing
3442 * a kernel warning
3443 */
3444 init_sub_crqs(adapter, 0);
3445
3446 reinit_completion(&adapter->init_done);
3447 wait_for_completion(&adapter->init_done);
3448
3449 /* if init_sub_crqs is partially successful, retry */
3450 while (!adapter->tx_scrq || !adapter->rx_scrq) {
3451 init_sub_crqs(adapter, 1);
3452
3453 reinit_completion(&adapter->init_done);
3454 wait_for_completion(&adapter->init_done);
3455 }
3456
3457 netdev->real_num_tx_queues = adapter->req_tx_queues;
3458
3459 rc = register_netdev(netdev);
3460 if (rc) {
3461 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3462 goto free_debugfs;
3463 }
3464 dev_info(&dev->dev, "ibmvnic registered\n");
3465
3466 return 0;
3467
3468free_debugfs:
3469 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3470 debugfs_remove_recursive(adapter->debugfs_dir);
3471free_crq:
3472 ibmvnic_release_crq_queue(adapter);
3473free_netdev:
3474 free_netdev(netdev);
3475 return rc;
3476}
3477
3478static int ibmvnic_remove(struct vio_dev *dev)
3479{
3480 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3481 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3482
3483 unregister_netdev(netdev);
3484
3485 release_sub_crqs(adapter);
3486
3487 ibmvnic_release_crq_queue(adapter);
3488
3489 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3490 debugfs_remove_recursive(adapter->debugfs_dir);
3491
3492 if (adapter->ras_comps)
3493 dma_free_coherent(&dev->dev,
3494 adapter->ras_comp_num *
3495 sizeof(struct ibmvnic_fw_component),
3496 adapter->ras_comps, adapter->ras_comps_tok);
3497
3498 kfree(adapter->ras_comp_int);
3499
3500 free_netdev(netdev);
3501 dev_set_drvdata(&dev->dev, NULL);
3502
3503 return 0;
3504}
3505
3506static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3507{
3508 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3509 struct ibmvnic_adapter *adapter;
3510 struct iommu_table *tbl;
3511 unsigned long ret = 0;
3512 int i;
3513
3514 tbl = get_iommu_table_base(&vdev->dev);
3515
3516 /* netdev inits at probe time along with the structures we need below*/
3517 if (!netdev)
3518 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3519
3520 adapter = netdev_priv(netdev);
3521
3522 ret += PAGE_SIZE; /* the crq message queue */
3523 ret += adapter->bounce_buffer_size;
3524 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3525
3526 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3527 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3528
3529 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3530 i++)
3531 ret += adapter->rx_pool[i].size *
3532 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3533
3534 return ret;
3535}
3536
3537static int ibmvnic_resume(struct device *dev)
3538{
3539 struct net_device *netdev = dev_get_drvdata(dev);
3540 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3541 int i;
3542
3543 /* kick the interrupt handlers just in case we lost an interrupt */
3544 for (i = 0; i < adapter->req_rx_queues; i++)
3545 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3546 adapter->rx_scrq[i]);
3547
3548 return 0;
3549}
3550
3551static struct vio_device_id ibmvnic_device_table[] = {
3552 {"network", "IBM,vnic"},
3553 {"", "" }
3554};
3555MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3556
3557static const struct dev_pm_ops ibmvnic_pm_ops = {
3558 .resume = ibmvnic_resume
3559};
3560
3561static struct vio_driver ibmvnic_driver = {
3562 .id_table = ibmvnic_device_table,
3563 .probe = ibmvnic_probe,
3564 .remove = ibmvnic_remove,
3565 .get_desired_dma = ibmvnic_get_desired_dma,
3566 .name = ibmvnic_driver_name,
3567 .pm = &ibmvnic_pm_ops,
3568};
3569
3570/* module functions */
3571static int __init ibmvnic_module_init(void)
3572{
3573 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3574 IBMVNIC_DRIVER_VERSION);
3575
3576 return vio_register_driver(&ibmvnic_driver);
3577}
3578
3579static void __exit ibmvnic_module_exit(void)
3580{
3581 vio_unregister_driver(&ibmvnic_driver);
3582}
3583
3584module_init(ibmvnic_module_init);
3585module_exit(ibmvnic_module_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/**************************************************************************/
3/* */
4/* IBM System i and System p Virtual NIC Device Driver */
5/* Copyright (C) 2014 IBM Corp. */
6/* Santiago Leon (santi_leon@yahoo.com) */
7/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8/* John Allen (jallen@linux.vnet.ibm.com) */
9/* */
10/* */
11/* This module contains the implementation of a virtual ethernet device */
12/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13/* option of the RS/6000 Platform Architecture to interface with virtual */
14/* ethernet NICs that are presented to the partition by the hypervisor. */
15/* */
16/* Messages are passed between the VNIC driver and the VNIC server using */
17/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18/* issue and receive commands that initiate communication with the server */
19/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20/* are used by the driver to notify the server that a packet is */
21/* ready for transmission or that a buffer has been added to receive a */
22/* packet. Subsequently, sCRQs are used by the server to notify the */
23/* driver that a packet transmission has been completed or that a packet */
24/* has been received and placed in a waiting buffer. */
25/* */
26/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27/* which skbs are DMA mapped and immediately unmapped when the transmit */
28/* or receive has been completed, the VNIC driver is required to use */
29/* "long term mapping". This entails that large, continuous DMA mapped */
30/* buffers are allocated on driver initialization and these buffers are */
31/* then continuously reused to pass skbs to and from the VNIC server. */
32/* */
33/**************************************************************************/
34
35#include <linux/module.h>
36#include <linux/moduleparam.h>
37#include <linux/types.h>
38#include <linux/errno.h>
39#include <linux/completion.h>
40#include <linux/ioport.h>
41#include <linux/dma-mapping.h>
42#include <linux/kernel.h>
43#include <linux/netdevice.h>
44#include <linux/etherdevice.h>
45#include <linux/skbuff.h>
46#include <linux/init.h>
47#include <linux/delay.h>
48#include <linux/mm.h>
49#include <linux/ethtool.h>
50#include <linux/proc_fs.h>
51#include <linux/if_arp.h>
52#include <linux/in.h>
53#include <linux/ip.h>
54#include <linux/ipv6.h>
55#include <linux/irq.h>
56#include <linux/kthread.h>
57#include <linux/seq_file.h>
58#include <linux/interrupt.h>
59#include <net/net_namespace.h>
60#include <asm/hvcall.h>
61#include <linux/atomic.h>
62#include <asm/vio.h>
63#include <asm/iommu.h>
64#include <linux/uaccess.h>
65#include <asm/firmware.h>
66#include <linux/workqueue.h>
67#include <linux/if_vlan.h>
68#include <linux/utsname.h>
69
70#include "ibmvnic.h"
71
72static const char ibmvnic_driver_name[] = "ibmvnic";
73static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
74
75MODULE_AUTHOR("Santiago Leon");
76MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77MODULE_LICENSE("GPL");
78MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
79
80static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81static int ibmvnic_remove(struct vio_dev *);
82static void release_sub_crqs(struct ibmvnic_adapter *, bool);
83static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
84static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
85static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
86static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
87static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
88 union sub_crq *sub_crq);
89static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
90static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
91static int enable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93static int disable_scrq_irq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95static int pending_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
98 struct ibmvnic_sub_crq_queue *);
99static int ibmvnic_poll(struct napi_struct *napi, int data);
100static void send_map_query(struct ibmvnic_adapter *adapter);
101static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
102static int send_request_unmap(struct ibmvnic_adapter *, u8);
103static int send_login(struct ibmvnic_adapter *adapter);
104static void send_cap_queries(struct ibmvnic_adapter *adapter);
105static int init_sub_crqs(struct ibmvnic_adapter *);
106static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
107static int ibmvnic_init(struct ibmvnic_adapter *);
108static int ibmvnic_reset_init(struct ibmvnic_adapter *);
109static void release_crq_queue(struct ibmvnic_adapter *);
110static int __ibmvnic_set_mac(struct net_device *, u8 *);
111static int init_crq_queue(struct ibmvnic_adapter *adapter);
112static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
113
114struct ibmvnic_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117};
118
119#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
120 offsetof(struct ibmvnic_statistics, stat))
121#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
122
123static const struct ibmvnic_stat ibmvnic_stats[] = {
124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
146};
147
148static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
149 unsigned long length, unsigned long *number,
150 unsigned long *irq)
151{
152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
153 long rc;
154
155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
156 *number = retbuf[0];
157 *irq = retbuf[1];
158
159 return rc;
160}
161
162/**
163 * ibmvnic_wait_for_completion - Check device state and wait for completion
164 * @adapter: private device data
165 * @comp_done: completion structure to wait for
166 * @timeout: time to wait in milliseconds
167 *
168 * Wait for a completion signal or until the timeout limit is reached
169 * while checking that the device is still active.
170 */
171static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
172 struct completion *comp_done,
173 unsigned long timeout)
174{
175 struct net_device *netdev;
176 unsigned long div_timeout;
177 u8 retry;
178
179 netdev = adapter->netdev;
180 retry = 5;
181 div_timeout = msecs_to_jiffies(timeout / retry);
182 while (true) {
183 if (!adapter->crq.active) {
184 netdev_err(netdev, "Device down!\n");
185 return -ENODEV;
186 }
187 if (!retry--)
188 break;
189 if (wait_for_completion_timeout(comp_done, div_timeout))
190 return 0;
191 }
192 netdev_err(netdev, "Operation timed out.\n");
193 return -ETIMEDOUT;
194}
195
196static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb, int size)
198{
199 struct device *dev = &adapter->vdev->dev;
200 int rc;
201
202 ltb->size = size;
203 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
204 GFP_KERNEL);
205
206 if (!ltb->buff) {
207 dev_err(dev, "Couldn't alloc long term buffer\n");
208 return -ENOMEM;
209 }
210 ltb->map_id = adapter->map_id;
211 adapter->map_id++;
212
213 mutex_lock(&adapter->fw_lock);
214 adapter->fw_done_rc = 0;
215 reinit_completion(&adapter->fw_done);
216 rc = send_request_map(adapter, ltb->addr,
217 ltb->size, ltb->map_id);
218 if (rc) {
219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
220 mutex_unlock(&adapter->fw_lock);
221 return rc;
222 }
223
224 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
225 if (rc) {
226 dev_err(dev,
227 "Long term map request aborted or timed out,rc = %d\n",
228 rc);
229 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
230 mutex_unlock(&adapter->fw_lock);
231 return rc;
232 }
233
234 if (adapter->fw_done_rc) {
235 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
236 adapter->fw_done_rc);
237 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
238 mutex_unlock(&adapter->fw_lock);
239 return -1;
240 }
241 mutex_unlock(&adapter->fw_lock);
242 return 0;
243}
244
245static void free_long_term_buff(struct ibmvnic_adapter *adapter,
246 struct ibmvnic_long_term_buff *ltb)
247{
248 struct device *dev = &adapter->vdev->dev;
249
250 if (!ltb->buff)
251 return;
252
253 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
254 adapter->reset_reason != VNIC_RESET_MOBILITY)
255 send_request_unmap(adapter, ltb->map_id);
256 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
257}
258
259static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
260 struct ibmvnic_long_term_buff *ltb)
261{
262 struct device *dev = &adapter->vdev->dev;
263 int rc;
264
265 memset(ltb->buff, 0, ltb->size);
266
267 mutex_lock(&adapter->fw_lock);
268 adapter->fw_done_rc = 0;
269
270 reinit_completion(&adapter->fw_done);
271 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
272 if (rc) {
273 mutex_unlock(&adapter->fw_lock);
274 return rc;
275 }
276
277 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
278 if (rc) {
279 dev_info(dev,
280 "Reset failed, long term map request timed out or aborted\n");
281 mutex_unlock(&adapter->fw_lock);
282 return rc;
283 }
284
285 if (adapter->fw_done_rc) {
286 dev_info(dev,
287 "Reset failed, attempting to free and reallocate buffer\n");
288 free_long_term_buff(adapter, ltb);
289 mutex_unlock(&adapter->fw_lock);
290 return alloc_long_term_buff(adapter, ltb, ltb->size);
291 }
292 mutex_unlock(&adapter->fw_lock);
293 return 0;
294}
295
296static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
297{
298 int i;
299
300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
301 i++)
302 adapter->rx_pool[i].active = 0;
303}
304
305static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
306 struct ibmvnic_rx_pool *pool)
307{
308 int count = pool->size - atomic_read(&pool->available);
309 struct device *dev = &adapter->vdev->dev;
310 int buffers_added = 0;
311 unsigned long lpar_rc;
312 union sub_crq sub_crq;
313 struct sk_buff *skb;
314 unsigned int offset;
315 dma_addr_t dma_addr;
316 unsigned char *dst;
317 u64 *handle_array;
318 int shift = 0;
319 int index;
320 int i;
321
322 if (!pool->active)
323 return;
324
325 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
326 be32_to_cpu(adapter->login_rsp_buf->
327 off_rxadd_subcrqs));
328
329 for (i = 0; i < count; ++i) {
330 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
331 if (!skb) {
332 dev_err(dev, "Couldn't replenish rx buff\n");
333 adapter->replenish_no_mem++;
334 break;
335 }
336
337 index = pool->free_map[pool->next_free];
338
339 if (pool->rx_buff[index].skb)
340 dev_err(dev, "Inconsistent free_map!\n");
341
342 /* Copy the skb to the long term mapped DMA buffer */
343 offset = index * pool->buff_size;
344 dst = pool->long_term_buff.buff + offset;
345 memset(dst, 0, pool->buff_size);
346 dma_addr = pool->long_term_buff.addr + offset;
347 pool->rx_buff[index].data = dst;
348
349 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
350 pool->rx_buff[index].dma = dma_addr;
351 pool->rx_buff[index].skb = skb;
352 pool->rx_buff[index].pool_index = pool->index;
353 pool->rx_buff[index].size = pool->buff_size;
354
355 memset(&sub_crq, 0, sizeof(sub_crq));
356 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
357 sub_crq.rx_add.correlator =
358 cpu_to_be64((u64)&pool->rx_buff[index]);
359 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
360 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
361
362 /* The length field of the sCRQ is defined to be 24 bits so the
363 * buffer size needs to be left shifted by a byte before it is
364 * converted to big endian to prevent the last byte from being
365 * truncated.
366 */
367#ifdef __LITTLE_ENDIAN__
368 shift = 8;
369#endif
370 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
371
372 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
373 &sub_crq);
374 if (lpar_rc != H_SUCCESS)
375 goto failure;
376
377 buffers_added++;
378 adapter->replenish_add_buff_success++;
379 pool->next_free = (pool->next_free + 1) % pool->size;
380 }
381 atomic_add(buffers_added, &pool->available);
382 return;
383
384failure:
385 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
386 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
387 pool->free_map[pool->next_free] = index;
388 pool->rx_buff[index].skb = NULL;
389
390 dev_kfree_skb_any(skb);
391 adapter->replenish_add_buff_failure++;
392 atomic_add(buffers_added, &pool->available);
393
394 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
395 /* Disable buffer pool replenishment and report carrier off if
396 * queue is closed or pending failover.
397 * Firmware guarantees that a signal will be sent to the
398 * driver, triggering a reset.
399 */
400 deactivate_rx_pools(adapter);
401 netif_carrier_off(adapter->netdev);
402 }
403}
404
405static void replenish_pools(struct ibmvnic_adapter *adapter)
406{
407 int i;
408
409 adapter->replenish_task_cycles++;
410 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
411 i++) {
412 if (adapter->rx_pool[i].active)
413 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
414 }
415}
416
417static void release_stats_buffers(struct ibmvnic_adapter *adapter)
418{
419 kfree(adapter->tx_stats_buffers);
420 kfree(adapter->rx_stats_buffers);
421 adapter->tx_stats_buffers = NULL;
422 adapter->rx_stats_buffers = NULL;
423}
424
425static int init_stats_buffers(struct ibmvnic_adapter *adapter)
426{
427 adapter->tx_stats_buffers =
428 kcalloc(IBMVNIC_MAX_QUEUES,
429 sizeof(struct ibmvnic_tx_queue_stats),
430 GFP_KERNEL);
431 if (!adapter->tx_stats_buffers)
432 return -ENOMEM;
433
434 adapter->rx_stats_buffers =
435 kcalloc(IBMVNIC_MAX_QUEUES,
436 sizeof(struct ibmvnic_rx_queue_stats),
437 GFP_KERNEL);
438 if (!adapter->rx_stats_buffers)
439 return -ENOMEM;
440
441 return 0;
442}
443
444static void release_stats_token(struct ibmvnic_adapter *adapter)
445{
446 struct device *dev = &adapter->vdev->dev;
447
448 if (!adapter->stats_token)
449 return;
450
451 dma_unmap_single(dev, adapter->stats_token,
452 sizeof(struct ibmvnic_statistics),
453 DMA_FROM_DEVICE);
454 adapter->stats_token = 0;
455}
456
457static int init_stats_token(struct ibmvnic_adapter *adapter)
458{
459 struct device *dev = &adapter->vdev->dev;
460 dma_addr_t stok;
461
462 stok = dma_map_single(dev, &adapter->stats,
463 sizeof(struct ibmvnic_statistics),
464 DMA_FROM_DEVICE);
465 if (dma_mapping_error(dev, stok)) {
466 dev_err(dev, "Couldn't map stats buffer\n");
467 return -1;
468 }
469
470 adapter->stats_token = stok;
471 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
472 return 0;
473}
474
475static int reset_rx_pools(struct ibmvnic_adapter *adapter)
476{
477 struct ibmvnic_rx_pool *rx_pool;
478 int rx_scrqs;
479 int i, j, rc;
480 u64 *size_array;
481
482 if (!adapter->rx_pool)
483 return -1;
484
485 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
486 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
487
488 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
489 for (i = 0; i < rx_scrqs; i++) {
490 rx_pool = &adapter->rx_pool[i];
491
492 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
493
494 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
495 free_long_term_buff(adapter, &rx_pool->long_term_buff);
496 rx_pool->buff_size = be64_to_cpu(size_array[i]);
497 rc = alloc_long_term_buff(adapter,
498 &rx_pool->long_term_buff,
499 rx_pool->size *
500 rx_pool->buff_size);
501 } else {
502 rc = reset_long_term_buff(adapter,
503 &rx_pool->long_term_buff);
504 }
505
506 if (rc)
507 return rc;
508
509 for (j = 0; j < rx_pool->size; j++)
510 rx_pool->free_map[j] = j;
511
512 memset(rx_pool->rx_buff, 0,
513 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
514
515 atomic_set(&rx_pool->available, 0);
516 rx_pool->next_alloc = 0;
517 rx_pool->next_free = 0;
518 rx_pool->active = 1;
519 }
520
521 return 0;
522}
523
524static void release_rx_pools(struct ibmvnic_adapter *adapter)
525{
526 struct ibmvnic_rx_pool *rx_pool;
527 int i, j;
528
529 if (!adapter->rx_pool)
530 return;
531
532 for (i = 0; i < adapter->num_active_rx_pools; i++) {
533 rx_pool = &adapter->rx_pool[i];
534
535 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
536
537 kfree(rx_pool->free_map);
538 free_long_term_buff(adapter, &rx_pool->long_term_buff);
539
540 if (!rx_pool->rx_buff)
541 continue;
542
543 for (j = 0; j < rx_pool->size; j++) {
544 if (rx_pool->rx_buff[j].skb) {
545 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
546 rx_pool->rx_buff[j].skb = NULL;
547 }
548 }
549
550 kfree(rx_pool->rx_buff);
551 }
552
553 kfree(adapter->rx_pool);
554 adapter->rx_pool = NULL;
555 adapter->num_active_rx_pools = 0;
556}
557
558static int init_rx_pools(struct net_device *netdev)
559{
560 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
561 struct device *dev = &adapter->vdev->dev;
562 struct ibmvnic_rx_pool *rx_pool;
563 int rxadd_subcrqs;
564 u64 *size_array;
565 int i, j;
566
567 rxadd_subcrqs =
568 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
569 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
570 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
571
572 adapter->rx_pool = kcalloc(rxadd_subcrqs,
573 sizeof(struct ibmvnic_rx_pool),
574 GFP_KERNEL);
575 if (!adapter->rx_pool) {
576 dev_err(dev, "Failed to allocate rx pools\n");
577 return -1;
578 }
579
580 adapter->num_active_rx_pools = rxadd_subcrqs;
581
582 for (i = 0; i < rxadd_subcrqs; i++) {
583 rx_pool = &adapter->rx_pool[i];
584
585 netdev_dbg(adapter->netdev,
586 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
587 i, adapter->req_rx_add_entries_per_subcrq,
588 be64_to_cpu(size_array[i]));
589
590 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
591 rx_pool->index = i;
592 rx_pool->buff_size = be64_to_cpu(size_array[i]);
593 rx_pool->active = 1;
594
595 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
596 GFP_KERNEL);
597 if (!rx_pool->free_map) {
598 release_rx_pools(adapter);
599 return -1;
600 }
601
602 rx_pool->rx_buff = kcalloc(rx_pool->size,
603 sizeof(struct ibmvnic_rx_buff),
604 GFP_KERNEL);
605 if (!rx_pool->rx_buff) {
606 dev_err(dev, "Couldn't alloc rx buffers\n");
607 release_rx_pools(adapter);
608 return -1;
609 }
610
611 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
612 rx_pool->size * rx_pool->buff_size)) {
613 release_rx_pools(adapter);
614 return -1;
615 }
616
617 for (j = 0; j < rx_pool->size; ++j)
618 rx_pool->free_map[j] = j;
619
620 atomic_set(&rx_pool->available, 0);
621 rx_pool->next_alloc = 0;
622 rx_pool->next_free = 0;
623 }
624
625 return 0;
626}
627
628static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
629 struct ibmvnic_tx_pool *tx_pool)
630{
631 int rc, i;
632
633 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
634 if (rc)
635 return rc;
636
637 memset(tx_pool->tx_buff, 0,
638 tx_pool->num_buffers *
639 sizeof(struct ibmvnic_tx_buff));
640
641 for (i = 0; i < tx_pool->num_buffers; i++)
642 tx_pool->free_map[i] = i;
643
644 tx_pool->consumer_index = 0;
645 tx_pool->producer_index = 0;
646
647 return 0;
648}
649
650static int reset_tx_pools(struct ibmvnic_adapter *adapter)
651{
652 int tx_scrqs;
653 int i, rc;
654
655 if (!adapter->tx_pool)
656 return -1;
657
658 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
659 for (i = 0; i < tx_scrqs; i++) {
660 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
661 if (rc)
662 return rc;
663 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
664 if (rc)
665 return rc;
666 }
667
668 return 0;
669}
670
671static void release_vpd_data(struct ibmvnic_adapter *adapter)
672{
673 if (!adapter->vpd)
674 return;
675
676 kfree(adapter->vpd->buff);
677 kfree(adapter->vpd);
678
679 adapter->vpd = NULL;
680}
681
682static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
683 struct ibmvnic_tx_pool *tx_pool)
684{
685 kfree(tx_pool->tx_buff);
686 kfree(tx_pool->free_map);
687 free_long_term_buff(adapter, &tx_pool->long_term_buff);
688}
689
690static void release_tx_pools(struct ibmvnic_adapter *adapter)
691{
692 int i;
693
694 if (!adapter->tx_pool)
695 return;
696
697 for (i = 0; i < adapter->num_active_tx_pools; i++) {
698 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
699 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
700 }
701
702 kfree(adapter->tx_pool);
703 adapter->tx_pool = NULL;
704 kfree(adapter->tso_pool);
705 adapter->tso_pool = NULL;
706 adapter->num_active_tx_pools = 0;
707}
708
709static int init_one_tx_pool(struct net_device *netdev,
710 struct ibmvnic_tx_pool *tx_pool,
711 int num_entries, int buf_size)
712{
713 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
714 int i;
715
716 tx_pool->tx_buff = kcalloc(num_entries,
717 sizeof(struct ibmvnic_tx_buff),
718 GFP_KERNEL);
719 if (!tx_pool->tx_buff)
720 return -1;
721
722 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
723 num_entries * buf_size))
724 return -1;
725
726 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
727 if (!tx_pool->free_map)
728 return -1;
729
730 for (i = 0; i < num_entries; i++)
731 tx_pool->free_map[i] = i;
732
733 tx_pool->consumer_index = 0;
734 tx_pool->producer_index = 0;
735 tx_pool->num_buffers = num_entries;
736 tx_pool->buf_size = buf_size;
737
738 return 0;
739}
740
741static int init_tx_pools(struct net_device *netdev)
742{
743 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
744 int tx_subcrqs;
745 int i, rc;
746
747 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
748 adapter->tx_pool = kcalloc(tx_subcrqs,
749 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
750 if (!adapter->tx_pool)
751 return -1;
752
753 adapter->tso_pool = kcalloc(tx_subcrqs,
754 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
755 if (!adapter->tso_pool)
756 return -1;
757
758 adapter->num_active_tx_pools = tx_subcrqs;
759
760 for (i = 0; i < tx_subcrqs; i++) {
761 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
762 adapter->req_tx_entries_per_subcrq,
763 adapter->req_mtu + VLAN_HLEN);
764 if (rc) {
765 release_tx_pools(adapter);
766 return rc;
767 }
768
769 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
770 IBMVNIC_TSO_BUFS,
771 IBMVNIC_TSO_BUF_SZ);
772 if (rc) {
773 release_tx_pools(adapter);
774 return rc;
775 }
776 }
777
778 return 0;
779}
780
781static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
782{
783 int i;
784
785 if (adapter->napi_enabled)
786 return;
787
788 for (i = 0; i < adapter->req_rx_queues; i++)
789 napi_enable(&adapter->napi[i]);
790
791 adapter->napi_enabled = true;
792}
793
794static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
795{
796 int i;
797
798 if (!adapter->napi_enabled)
799 return;
800
801 for (i = 0; i < adapter->req_rx_queues; i++) {
802 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
803 napi_disable(&adapter->napi[i]);
804 }
805
806 adapter->napi_enabled = false;
807}
808
809static int init_napi(struct ibmvnic_adapter *adapter)
810{
811 int i;
812
813 adapter->napi = kcalloc(adapter->req_rx_queues,
814 sizeof(struct napi_struct), GFP_KERNEL);
815 if (!adapter->napi)
816 return -ENOMEM;
817
818 for (i = 0; i < adapter->req_rx_queues; i++) {
819 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
820 netif_napi_add(adapter->netdev, &adapter->napi[i],
821 ibmvnic_poll, NAPI_POLL_WEIGHT);
822 }
823
824 adapter->num_active_rx_napi = adapter->req_rx_queues;
825 return 0;
826}
827
828static void release_napi(struct ibmvnic_adapter *adapter)
829{
830 int i;
831
832 if (!adapter->napi)
833 return;
834
835 for (i = 0; i < adapter->num_active_rx_napi; i++) {
836 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
837 netif_napi_del(&adapter->napi[i]);
838 }
839
840 kfree(adapter->napi);
841 adapter->napi = NULL;
842 adapter->num_active_rx_napi = 0;
843 adapter->napi_enabled = false;
844}
845
846static int ibmvnic_login(struct net_device *netdev)
847{
848 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
849 unsigned long timeout = msecs_to_jiffies(30000);
850 int retry_count = 0;
851 int retries = 10;
852 bool retry;
853 int rc;
854
855 do {
856 retry = false;
857 if (retry_count > retries) {
858 netdev_warn(netdev, "Login attempts exceeded\n");
859 return -1;
860 }
861
862 adapter->init_done_rc = 0;
863 reinit_completion(&adapter->init_done);
864 rc = send_login(adapter);
865 if (rc) {
866 netdev_warn(netdev, "Unable to login\n");
867 return rc;
868 }
869
870 if (!wait_for_completion_timeout(&adapter->init_done,
871 timeout)) {
872 netdev_warn(netdev, "Login timed out, retrying...\n");
873 retry = true;
874 adapter->init_done_rc = 0;
875 retry_count++;
876 continue;
877 }
878
879 if (adapter->init_done_rc == ABORTED) {
880 netdev_warn(netdev, "Login aborted, retrying...\n");
881 retry = true;
882 adapter->init_done_rc = 0;
883 retry_count++;
884 /* FW or device may be busy, so
885 * wait a bit before retrying login
886 */
887 msleep(500);
888 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
889 retry_count++;
890 release_sub_crqs(adapter, 1);
891
892 retry = true;
893 netdev_dbg(netdev,
894 "Received partial success, retrying...\n");
895 adapter->init_done_rc = 0;
896 reinit_completion(&adapter->init_done);
897 send_cap_queries(adapter);
898 if (!wait_for_completion_timeout(&adapter->init_done,
899 timeout)) {
900 netdev_warn(netdev,
901 "Capabilities query timed out\n");
902 return -1;
903 }
904
905 rc = init_sub_crqs(adapter);
906 if (rc) {
907 netdev_warn(netdev,
908 "SCRQ initialization failed\n");
909 return -1;
910 }
911
912 rc = init_sub_crq_irqs(adapter);
913 if (rc) {
914 netdev_warn(netdev,
915 "SCRQ irq initialization failed\n");
916 return -1;
917 }
918 } else if (adapter->init_done_rc) {
919 netdev_warn(netdev, "Adapter login failed\n");
920 return -1;
921 }
922 } while (retry);
923
924 __ibmvnic_set_mac(netdev, adapter->mac_addr);
925
926 return 0;
927}
928
929static void release_login_buffer(struct ibmvnic_adapter *adapter)
930{
931 kfree(adapter->login_buf);
932 adapter->login_buf = NULL;
933}
934
935static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
936{
937 kfree(adapter->login_rsp_buf);
938 adapter->login_rsp_buf = NULL;
939}
940
941static void release_resources(struct ibmvnic_adapter *adapter)
942{
943 release_vpd_data(adapter);
944
945 release_tx_pools(adapter);
946 release_rx_pools(adapter);
947
948 release_napi(adapter);
949 release_login_rsp_buffer(adapter);
950}
951
952static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
953{
954 struct net_device *netdev = adapter->netdev;
955 unsigned long timeout = msecs_to_jiffies(30000);
956 union ibmvnic_crq crq;
957 bool resend;
958 int rc;
959
960 netdev_dbg(netdev, "setting link state %d\n", link_state);
961
962 memset(&crq, 0, sizeof(crq));
963 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
964 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
965 crq.logical_link_state.link_state = link_state;
966
967 do {
968 resend = false;
969
970 reinit_completion(&adapter->init_done);
971 rc = ibmvnic_send_crq(adapter, &crq);
972 if (rc) {
973 netdev_err(netdev, "Failed to set link state\n");
974 return rc;
975 }
976
977 if (!wait_for_completion_timeout(&adapter->init_done,
978 timeout)) {
979 netdev_err(netdev, "timeout setting link state\n");
980 return -1;
981 }
982
983 if (adapter->init_done_rc == 1) {
984 /* Partuial success, delay and re-send */
985 mdelay(1000);
986 resend = true;
987 } else if (adapter->init_done_rc) {
988 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
989 adapter->init_done_rc);
990 return adapter->init_done_rc;
991 }
992 } while (resend);
993
994 return 0;
995}
996
997static int set_real_num_queues(struct net_device *netdev)
998{
999 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1000 int rc;
1001
1002 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1003 adapter->req_tx_queues, adapter->req_rx_queues);
1004
1005 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1006 if (rc) {
1007 netdev_err(netdev, "failed to set the number of tx queues\n");
1008 return rc;
1009 }
1010
1011 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1012 if (rc)
1013 netdev_err(netdev, "failed to set the number of rx queues\n");
1014
1015 return rc;
1016}
1017
1018static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1019{
1020 struct device *dev = &adapter->vdev->dev;
1021 union ibmvnic_crq crq;
1022 int len = 0;
1023 int rc;
1024
1025 if (adapter->vpd->buff)
1026 len = adapter->vpd->len;
1027
1028 mutex_lock(&adapter->fw_lock);
1029 adapter->fw_done_rc = 0;
1030 reinit_completion(&adapter->fw_done);
1031
1032 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1033 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1034 rc = ibmvnic_send_crq(adapter, &crq);
1035 if (rc) {
1036 mutex_unlock(&adapter->fw_lock);
1037 return rc;
1038 }
1039
1040 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1041 if (rc) {
1042 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1043 mutex_unlock(&adapter->fw_lock);
1044 return rc;
1045 }
1046 mutex_unlock(&adapter->fw_lock);
1047
1048 if (!adapter->vpd->len)
1049 return -ENODATA;
1050
1051 if (!adapter->vpd->buff)
1052 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1053 else if (adapter->vpd->len != len)
1054 adapter->vpd->buff =
1055 krealloc(adapter->vpd->buff,
1056 adapter->vpd->len, GFP_KERNEL);
1057
1058 if (!adapter->vpd->buff) {
1059 dev_err(dev, "Could allocate VPD buffer\n");
1060 return -ENOMEM;
1061 }
1062
1063 adapter->vpd->dma_addr =
1064 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1065 DMA_FROM_DEVICE);
1066 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1067 dev_err(dev, "Could not map VPD buffer\n");
1068 kfree(adapter->vpd->buff);
1069 adapter->vpd->buff = NULL;
1070 return -ENOMEM;
1071 }
1072
1073 mutex_lock(&adapter->fw_lock);
1074 adapter->fw_done_rc = 0;
1075 reinit_completion(&adapter->fw_done);
1076
1077 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1078 crq.get_vpd.cmd = GET_VPD;
1079 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1080 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1081 rc = ibmvnic_send_crq(adapter, &crq);
1082 if (rc) {
1083 kfree(adapter->vpd->buff);
1084 adapter->vpd->buff = NULL;
1085 mutex_unlock(&adapter->fw_lock);
1086 return rc;
1087 }
1088
1089 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1090 if (rc) {
1091 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1092 kfree(adapter->vpd->buff);
1093 adapter->vpd->buff = NULL;
1094 mutex_unlock(&adapter->fw_lock);
1095 return rc;
1096 }
1097
1098 mutex_unlock(&adapter->fw_lock);
1099 return 0;
1100}
1101
1102static int init_resources(struct ibmvnic_adapter *adapter)
1103{
1104 struct net_device *netdev = adapter->netdev;
1105 int rc;
1106
1107 rc = set_real_num_queues(netdev);
1108 if (rc)
1109 return rc;
1110
1111 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1112 if (!adapter->vpd)
1113 return -ENOMEM;
1114
1115 /* Vital Product Data (VPD) */
1116 rc = ibmvnic_get_vpd(adapter);
1117 if (rc) {
1118 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1119 return rc;
1120 }
1121
1122 adapter->map_id = 1;
1123
1124 rc = init_napi(adapter);
1125 if (rc)
1126 return rc;
1127
1128 send_map_query(adapter);
1129
1130 rc = init_rx_pools(netdev);
1131 if (rc)
1132 return rc;
1133
1134 rc = init_tx_pools(netdev);
1135 return rc;
1136}
1137
1138static int __ibmvnic_open(struct net_device *netdev)
1139{
1140 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1141 enum vnic_state prev_state = adapter->state;
1142 int i, rc;
1143
1144 adapter->state = VNIC_OPENING;
1145 replenish_pools(adapter);
1146 ibmvnic_napi_enable(adapter);
1147
1148 /* We're ready to receive frames, enable the sub-crq interrupts and
1149 * set the logical link state to up
1150 */
1151 for (i = 0; i < adapter->req_rx_queues; i++) {
1152 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1153 if (prev_state == VNIC_CLOSED)
1154 enable_irq(adapter->rx_scrq[i]->irq);
1155 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1156 }
1157
1158 for (i = 0; i < adapter->req_tx_queues; i++) {
1159 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1160 if (prev_state == VNIC_CLOSED)
1161 enable_irq(adapter->tx_scrq[i]->irq);
1162 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1163 }
1164
1165 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1166 if (rc) {
1167 for (i = 0; i < adapter->req_rx_queues; i++)
1168 napi_disable(&adapter->napi[i]);
1169 release_resources(adapter);
1170 return rc;
1171 }
1172
1173 netif_tx_start_all_queues(netdev);
1174
1175 if (prev_state == VNIC_CLOSED) {
1176 for (i = 0; i < adapter->req_rx_queues; i++)
1177 napi_schedule(&adapter->napi[i]);
1178 }
1179
1180 adapter->state = VNIC_OPEN;
1181 return rc;
1182}
1183
1184static int ibmvnic_open(struct net_device *netdev)
1185{
1186 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1187 int rc;
1188
1189 /* If device failover is pending, just set device state and return.
1190 * Device operation will be handled by reset routine.
1191 */
1192 if (adapter->failover_pending) {
1193 adapter->state = VNIC_OPEN;
1194 return 0;
1195 }
1196
1197 if (adapter->state != VNIC_CLOSED) {
1198 rc = ibmvnic_login(netdev);
1199 if (rc)
1200 return rc;
1201
1202 rc = init_resources(adapter);
1203 if (rc) {
1204 netdev_err(netdev, "failed to initialize resources\n");
1205 release_resources(adapter);
1206 return rc;
1207 }
1208 }
1209
1210 rc = __ibmvnic_open(netdev);
1211
1212 return rc;
1213}
1214
1215static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1216{
1217 struct ibmvnic_rx_pool *rx_pool;
1218 struct ibmvnic_rx_buff *rx_buff;
1219 u64 rx_entries;
1220 int rx_scrqs;
1221 int i, j;
1222
1223 if (!adapter->rx_pool)
1224 return;
1225
1226 rx_scrqs = adapter->num_active_rx_pools;
1227 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1228
1229 /* Free any remaining skbs in the rx buffer pools */
1230 for (i = 0; i < rx_scrqs; i++) {
1231 rx_pool = &adapter->rx_pool[i];
1232 if (!rx_pool || !rx_pool->rx_buff)
1233 continue;
1234
1235 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1236 for (j = 0; j < rx_entries; j++) {
1237 rx_buff = &rx_pool->rx_buff[j];
1238 if (rx_buff && rx_buff->skb) {
1239 dev_kfree_skb_any(rx_buff->skb);
1240 rx_buff->skb = NULL;
1241 }
1242 }
1243 }
1244}
1245
1246static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1247 struct ibmvnic_tx_pool *tx_pool)
1248{
1249 struct ibmvnic_tx_buff *tx_buff;
1250 u64 tx_entries;
1251 int i;
1252
1253 if (!tx_pool || !tx_pool->tx_buff)
1254 return;
1255
1256 tx_entries = tx_pool->num_buffers;
1257
1258 for (i = 0; i < tx_entries; i++) {
1259 tx_buff = &tx_pool->tx_buff[i];
1260 if (tx_buff && tx_buff->skb) {
1261 dev_kfree_skb_any(tx_buff->skb);
1262 tx_buff->skb = NULL;
1263 }
1264 }
1265}
1266
1267static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1268{
1269 int tx_scrqs;
1270 int i;
1271
1272 if (!adapter->tx_pool || !adapter->tso_pool)
1273 return;
1274
1275 tx_scrqs = adapter->num_active_tx_pools;
1276
1277 /* Free any remaining skbs in the tx buffer pools */
1278 for (i = 0; i < tx_scrqs; i++) {
1279 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1280 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1281 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1282 }
1283}
1284
1285static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1286{
1287 struct net_device *netdev = adapter->netdev;
1288 int i;
1289
1290 if (adapter->tx_scrq) {
1291 for (i = 0; i < adapter->req_tx_queues; i++)
1292 if (adapter->tx_scrq[i]->irq) {
1293 netdev_dbg(netdev,
1294 "Disabling tx_scrq[%d] irq\n", i);
1295 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1296 disable_irq(adapter->tx_scrq[i]->irq);
1297 }
1298 }
1299
1300 if (adapter->rx_scrq) {
1301 for (i = 0; i < adapter->req_rx_queues; i++) {
1302 if (adapter->rx_scrq[i]->irq) {
1303 netdev_dbg(netdev,
1304 "Disabling rx_scrq[%d] irq\n", i);
1305 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1306 disable_irq(adapter->rx_scrq[i]->irq);
1307 }
1308 }
1309 }
1310}
1311
1312static void ibmvnic_cleanup(struct net_device *netdev)
1313{
1314 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1315
1316 /* ensure that transmissions are stopped if called by do_reset */
1317 if (test_bit(0, &adapter->resetting))
1318 netif_tx_disable(netdev);
1319 else
1320 netif_tx_stop_all_queues(netdev);
1321
1322 ibmvnic_napi_disable(adapter);
1323 ibmvnic_disable_irqs(adapter);
1324
1325 clean_rx_pools(adapter);
1326 clean_tx_pools(adapter);
1327}
1328
1329static int __ibmvnic_close(struct net_device *netdev)
1330{
1331 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1332 int rc = 0;
1333
1334 adapter->state = VNIC_CLOSING;
1335 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1336 if (rc)
1337 return rc;
1338 adapter->state = VNIC_CLOSED;
1339 return 0;
1340}
1341
1342static int ibmvnic_close(struct net_device *netdev)
1343{
1344 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1345 int rc;
1346
1347 /* If device failover is pending, just set device state and return.
1348 * Device operation will be handled by reset routine.
1349 */
1350 if (adapter->failover_pending) {
1351 adapter->state = VNIC_CLOSED;
1352 return 0;
1353 }
1354
1355 rc = __ibmvnic_close(netdev);
1356 ibmvnic_cleanup(netdev);
1357
1358 return rc;
1359}
1360
1361/**
1362 * build_hdr_data - creates L2/L3/L4 header data buffer
1363 * @hdr_field - bitfield determining needed headers
1364 * @skb - socket buffer
1365 * @hdr_len - array of header lengths
1366 * @tot_len - total length of data
1367 *
1368 * Reads hdr_field to determine which headers are needed by firmware.
1369 * Builds a buffer containing these headers. Saves individual header
1370 * lengths and total buffer length to be used to build descriptors.
1371 */
1372static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1373 int *hdr_len, u8 *hdr_data)
1374{
1375 int len = 0;
1376 u8 *hdr;
1377
1378 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1379 hdr_len[0] = sizeof(struct vlan_ethhdr);
1380 else
1381 hdr_len[0] = sizeof(struct ethhdr);
1382
1383 if (skb->protocol == htons(ETH_P_IP)) {
1384 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1385 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1386 hdr_len[2] = tcp_hdrlen(skb);
1387 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1388 hdr_len[2] = sizeof(struct udphdr);
1389 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1390 hdr_len[1] = sizeof(struct ipv6hdr);
1391 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1392 hdr_len[2] = tcp_hdrlen(skb);
1393 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1394 hdr_len[2] = sizeof(struct udphdr);
1395 } else if (skb->protocol == htons(ETH_P_ARP)) {
1396 hdr_len[1] = arp_hdr_len(skb->dev);
1397 hdr_len[2] = 0;
1398 }
1399
1400 memset(hdr_data, 0, 120);
1401 if ((hdr_field >> 6) & 1) {
1402 hdr = skb_mac_header(skb);
1403 memcpy(hdr_data, hdr, hdr_len[0]);
1404 len += hdr_len[0];
1405 }
1406
1407 if ((hdr_field >> 5) & 1) {
1408 hdr = skb_network_header(skb);
1409 memcpy(hdr_data + len, hdr, hdr_len[1]);
1410 len += hdr_len[1];
1411 }
1412
1413 if ((hdr_field >> 4) & 1) {
1414 hdr = skb_transport_header(skb);
1415 memcpy(hdr_data + len, hdr, hdr_len[2]);
1416 len += hdr_len[2];
1417 }
1418 return len;
1419}
1420
1421/**
1422 * create_hdr_descs - create header and header extension descriptors
1423 * @hdr_field - bitfield determining needed headers
1424 * @data - buffer containing header data
1425 * @len - length of data buffer
1426 * @hdr_len - array of individual header lengths
1427 * @scrq_arr - descriptor array
1428 *
1429 * Creates header and, if needed, header extension descriptors and
1430 * places them in a descriptor array, scrq_arr
1431 */
1432
1433static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1434 union sub_crq *scrq_arr)
1435{
1436 union sub_crq hdr_desc;
1437 int tmp_len = len;
1438 int num_descs = 0;
1439 u8 *data, *cur;
1440 int tmp;
1441
1442 while (tmp_len > 0) {
1443 cur = hdr_data + len - tmp_len;
1444
1445 memset(&hdr_desc, 0, sizeof(hdr_desc));
1446 if (cur != hdr_data) {
1447 data = hdr_desc.hdr_ext.data;
1448 tmp = tmp_len > 29 ? 29 : tmp_len;
1449 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1450 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1451 hdr_desc.hdr_ext.len = tmp;
1452 } else {
1453 data = hdr_desc.hdr.data;
1454 tmp = tmp_len > 24 ? 24 : tmp_len;
1455 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1456 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1457 hdr_desc.hdr.len = tmp;
1458 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1459 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1460 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1461 hdr_desc.hdr.flag = hdr_field << 1;
1462 }
1463 memcpy(data, cur, tmp);
1464 tmp_len -= tmp;
1465 *scrq_arr = hdr_desc;
1466 scrq_arr++;
1467 num_descs++;
1468 }
1469
1470 return num_descs;
1471}
1472
1473/**
1474 * build_hdr_descs_arr - build a header descriptor array
1475 * @skb - socket buffer
1476 * @num_entries - number of descriptors to be sent
1477 * @subcrq - first TX descriptor
1478 * @hdr_field - bit field determining which headers will be sent
1479 *
1480 * This function will build a TX descriptor array with applicable
1481 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1482 */
1483
1484static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1485 int *num_entries, u8 hdr_field)
1486{
1487 int hdr_len[3] = {0, 0, 0};
1488 int tot_len;
1489 u8 *hdr_data = txbuff->hdr_data;
1490
1491 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1492 txbuff->hdr_data);
1493 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1494 txbuff->indir_arr + 1);
1495}
1496
1497static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1498 struct net_device *netdev)
1499{
1500 /* For some backing devices, mishandling of small packets
1501 * can result in a loss of connection or TX stall. Device
1502 * architects recommend that no packet should be smaller
1503 * than the minimum MTU value provided to the driver, so
1504 * pad any packets to that length
1505 */
1506 if (skb->len < netdev->min_mtu)
1507 return skb_put_padto(skb, netdev->min_mtu);
1508
1509 return 0;
1510}
1511
1512static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1513{
1514 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1515 int queue_num = skb_get_queue_mapping(skb);
1516 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1517 struct device *dev = &adapter->vdev->dev;
1518 struct ibmvnic_tx_buff *tx_buff = NULL;
1519 struct ibmvnic_sub_crq_queue *tx_scrq;
1520 struct ibmvnic_tx_pool *tx_pool;
1521 unsigned int tx_send_failed = 0;
1522 unsigned int tx_map_failed = 0;
1523 unsigned int tx_dropped = 0;
1524 unsigned int tx_packets = 0;
1525 unsigned int tx_bytes = 0;
1526 dma_addr_t data_dma_addr;
1527 struct netdev_queue *txq;
1528 unsigned long lpar_rc;
1529 union sub_crq tx_crq;
1530 unsigned int offset;
1531 int num_entries = 1;
1532 unsigned char *dst;
1533 u64 *handle_array;
1534 int index = 0;
1535 u8 proto = 0;
1536 netdev_tx_t ret = NETDEV_TX_OK;
1537
1538 if (test_bit(0, &adapter->resetting)) {
1539 if (!netif_subqueue_stopped(netdev, skb))
1540 netif_stop_subqueue(netdev, queue_num);
1541 dev_kfree_skb_any(skb);
1542
1543 tx_send_failed++;
1544 tx_dropped++;
1545 ret = NETDEV_TX_OK;
1546 goto out;
1547 }
1548
1549 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1550 tx_dropped++;
1551 tx_send_failed++;
1552 ret = NETDEV_TX_OK;
1553 goto out;
1554 }
1555 if (skb_is_gso(skb))
1556 tx_pool = &adapter->tso_pool[queue_num];
1557 else
1558 tx_pool = &adapter->tx_pool[queue_num];
1559
1560 tx_scrq = adapter->tx_scrq[queue_num];
1561 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1562 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1563 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1564
1565 index = tx_pool->free_map[tx_pool->consumer_index];
1566
1567 if (index == IBMVNIC_INVALID_MAP) {
1568 dev_kfree_skb_any(skb);
1569 tx_send_failed++;
1570 tx_dropped++;
1571 ret = NETDEV_TX_OK;
1572 goto out;
1573 }
1574
1575 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1576
1577 offset = index * tx_pool->buf_size;
1578 dst = tx_pool->long_term_buff.buff + offset;
1579 memset(dst, 0, tx_pool->buf_size);
1580 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1581
1582 if (skb_shinfo(skb)->nr_frags) {
1583 int cur, i;
1584
1585 /* Copy the head */
1586 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1587 cur = skb_headlen(skb);
1588
1589 /* Copy the frags */
1590 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1591 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1592
1593 memcpy(dst + cur,
1594 page_address(skb_frag_page(frag)) +
1595 skb_frag_off(frag), skb_frag_size(frag));
1596 cur += skb_frag_size(frag);
1597 }
1598 } else {
1599 skb_copy_from_linear_data(skb, dst, skb->len);
1600 }
1601
1602 tx_pool->consumer_index =
1603 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1604
1605 tx_buff = &tx_pool->tx_buff[index];
1606 tx_buff->skb = skb;
1607 tx_buff->data_dma[0] = data_dma_addr;
1608 tx_buff->data_len[0] = skb->len;
1609 tx_buff->index = index;
1610 tx_buff->pool_index = queue_num;
1611 tx_buff->last_frag = true;
1612
1613 memset(&tx_crq, 0, sizeof(tx_crq));
1614 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1615 tx_crq.v1.type = IBMVNIC_TX_DESC;
1616 tx_crq.v1.n_crq_elem = 1;
1617 tx_crq.v1.n_sge = 1;
1618 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1619
1620 if (skb_is_gso(skb))
1621 tx_crq.v1.correlator =
1622 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1623 else
1624 tx_crq.v1.correlator = cpu_to_be32(index);
1625 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1626 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1627 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1628
1629 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1630 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1631 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1632 }
1633
1634 if (skb->protocol == htons(ETH_P_IP)) {
1635 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1636 proto = ip_hdr(skb)->protocol;
1637 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1638 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1639 proto = ipv6_hdr(skb)->nexthdr;
1640 }
1641
1642 if (proto == IPPROTO_TCP)
1643 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1644 else if (proto == IPPROTO_UDP)
1645 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1646
1647 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1648 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1649 hdrs += 2;
1650 }
1651 if (skb_is_gso(skb)) {
1652 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1653 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1654 hdrs += 2;
1655 }
1656 /* determine if l2/3/4 headers are sent to firmware */
1657 if ((*hdrs >> 7) & 1) {
1658 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1659 tx_crq.v1.n_crq_elem = num_entries;
1660 tx_buff->num_entries = num_entries;
1661 tx_buff->indir_arr[0] = tx_crq;
1662 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1663 sizeof(tx_buff->indir_arr),
1664 DMA_TO_DEVICE);
1665 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1666 dev_kfree_skb_any(skb);
1667 tx_buff->skb = NULL;
1668 if (!firmware_has_feature(FW_FEATURE_CMO))
1669 dev_err(dev, "tx: unable to map descriptor array\n");
1670 tx_map_failed++;
1671 tx_dropped++;
1672 ret = NETDEV_TX_OK;
1673 goto tx_err_out;
1674 }
1675 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1676 (u64)tx_buff->indir_dma,
1677 (u64)num_entries);
1678 dma_unmap_single(dev, tx_buff->indir_dma,
1679 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1680 } else {
1681 tx_buff->num_entries = num_entries;
1682 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1683 &tx_crq);
1684 }
1685 if (lpar_rc != H_SUCCESS) {
1686 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1687 dev_err_ratelimited(dev, "tx: send failed\n");
1688 dev_kfree_skb_any(skb);
1689 tx_buff->skb = NULL;
1690
1691 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1692 /* Disable TX and report carrier off if queue is closed
1693 * or pending failover.
1694 * Firmware guarantees that a signal will be sent to the
1695 * driver, triggering a reset or some other action.
1696 */
1697 netif_tx_stop_all_queues(netdev);
1698 netif_carrier_off(netdev);
1699 }
1700
1701 tx_send_failed++;
1702 tx_dropped++;
1703 ret = NETDEV_TX_OK;
1704 goto tx_err_out;
1705 }
1706
1707 if (atomic_add_return(num_entries, &tx_scrq->used)
1708 >= adapter->req_tx_entries_per_subcrq) {
1709 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1710 netif_stop_subqueue(netdev, queue_num);
1711 }
1712
1713 tx_packets++;
1714 tx_bytes += skb->len;
1715 txq->trans_start = jiffies;
1716 ret = NETDEV_TX_OK;
1717 goto out;
1718
1719tx_err_out:
1720 /* roll back consumer index and map array*/
1721 if (tx_pool->consumer_index == 0)
1722 tx_pool->consumer_index =
1723 tx_pool->num_buffers - 1;
1724 else
1725 tx_pool->consumer_index--;
1726 tx_pool->free_map[tx_pool->consumer_index] = index;
1727out:
1728 netdev->stats.tx_dropped += tx_dropped;
1729 netdev->stats.tx_bytes += tx_bytes;
1730 netdev->stats.tx_packets += tx_packets;
1731 adapter->tx_send_failed += tx_send_failed;
1732 adapter->tx_map_failed += tx_map_failed;
1733 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1734 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1735 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1736
1737 return ret;
1738}
1739
1740static void ibmvnic_set_multi(struct net_device *netdev)
1741{
1742 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1743 struct netdev_hw_addr *ha;
1744 union ibmvnic_crq crq;
1745
1746 memset(&crq, 0, sizeof(crq));
1747 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1748 crq.request_capability.cmd = REQUEST_CAPABILITY;
1749
1750 if (netdev->flags & IFF_PROMISC) {
1751 if (!adapter->promisc_supported)
1752 return;
1753 } else {
1754 if (netdev->flags & IFF_ALLMULTI) {
1755 /* Accept all multicast */
1756 memset(&crq, 0, sizeof(crq));
1757 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1758 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1759 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1760 ibmvnic_send_crq(adapter, &crq);
1761 } else if (netdev_mc_empty(netdev)) {
1762 /* Reject all multicast */
1763 memset(&crq, 0, sizeof(crq));
1764 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1765 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1766 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1767 ibmvnic_send_crq(adapter, &crq);
1768 } else {
1769 /* Accept one or more multicast(s) */
1770 netdev_for_each_mc_addr(ha, netdev) {
1771 memset(&crq, 0, sizeof(crq));
1772 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1773 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1774 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1775 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1776 ha->addr);
1777 ibmvnic_send_crq(adapter, &crq);
1778 }
1779 }
1780 }
1781}
1782
1783static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1784{
1785 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1786 union ibmvnic_crq crq;
1787 int rc;
1788
1789 if (!is_valid_ether_addr(dev_addr)) {
1790 rc = -EADDRNOTAVAIL;
1791 goto err;
1792 }
1793
1794 memset(&crq, 0, sizeof(crq));
1795 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1796 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1797 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1798
1799 mutex_lock(&adapter->fw_lock);
1800 adapter->fw_done_rc = 0;
1801 reinit_completion(&adapter->fw_done);
1802
1803 rc = ibmvnic_send_crq(adapter, &crq);
1804 if (rc) {
1805 rc = -EIO;
1806 mutex_unlock(&adapter->fw_lock);
1807 goto err;
1808 }
1809
1810 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1811 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1812 if (rc || adapter->fw_done_rc) {
1813 rc = -EIO;
1814 mutex_unlock(&adapter->fw_lock);
1815 goto err;
1816 }
1817 mutex_unlock(&adapter->fw_lock);
1818 return 0;
1819err:
1820 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1821 return rc;
1822}
1823
1824static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1825{
1826 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1827 struct sockaddr *addr = p;
1828 int rc;
1829
1830 rc = 0;
1831 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1832 if (adapter->state != VNIC_PROBED)
1833 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1834
1835 return rc;
1836}
1837
1838/**
1839 * do_change_param_reset returns zero if we are able to keep processing reset
1840 * events, or non-zero if we hit a fatal error and must halt.
1841 */
1842static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1843 struct ibmvnic_rwi *rwi,
1844 u32 reset_state)
1845{
1846 struct net_device *netdev = adapter->netdev;
1847 int i, rc;
1848
1849 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1850 rwi->reset_reason);
1851
1852 netif_carrier_off(netdev);
1853 adapter->reset_reason = rwi->reset_reason;
1854
1855 ibmvnic_cleanup(netdev);
1856
1857 if (reset_state == VNIC_OPEN) {
1858 rc = __ibmvnic_close(netdev);
1859 if (rc)
1860 return rc;
1861 }
1862
1863 release_resources(adapter);
1864 release_sub_crqs(adapter, 1);
1865 release_crq_queue(adapter);
1866
1867 adapter->state = VNIC_PROBED;
1868
1869 rc = init_crq_queue(adapter);
1870
1871 if (rc) {
1872 netdev_err(adapter->netdev,
1873 "Couldn't initialize crq. rc=%d\n", rc);
1874 return rc;
1875 }
1876
1877 rc = ibmvnic_reset_init(adapter);
1878 if (rc)
1879 return IBMVNIC_INIT_FAILED;
1880
1881 /* If the adapter was in PROBE state prior to the reset,
1882 * exit here.
1883 */
1884 if (reset_state == VNIC_PROBED)
1885 return 0;
1886
1887 rc = ibmvnic_login(netdev);
1888 if (rc) {
1889 adapter->state = reset_state;
1890 return rc;
1891 }
1892
1893 rc = init_resources(adapter);
1894 if (rc)
1895 return rc;
1896
1897 ibmvnic_disable_irqs(adapter);
1898
1899 adapter->state = VNIC_CLOSED;
1900
1901 if (reset_state == VNIC_CLOSED)
1902 return 0;
1903
1904 rc = __ibmvnic_open(netdev);
1905 if (rc)
1906 return IBMVNIC_OPEN_FAILED;
1907
1908 /* refresh device's multicast list */
1909 ibmvnic_set_multi(netdev);
1910
1911 /* kick napi */
1912 for (i = 0; i < adapter->req_rx_queues; i++)
1913 napi_schedule(&adapter->napi[i]);
1914
1915 return 0;
1916}
1917
1918/**
1919 * do_reset returns zero if we are able to keep processing reset events, or
1920 * non-zero if we hit a fatal error and must halt.
1921 */
1922static int do_reset(struct ibmvnic_adapter *adapter,
1923 struct ibmvnic_rwi *rwi, u32 reset_state)
1924{
1925 u64 old_num_rx_queues, old_num_tx_queues;
1926 u64 old_num_rx_slots, old_num_tx_slots;
1927 struct net_device *netdev = adapter->netdev;
1928 int i, rc;
1929
1930 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1931 rwi->reset_reason);
1932
1933 rtnl_lock();
1934
1935 netif_carrier_off(netdev);
1936 adapter->reset_reason = rwi->reset_reason;
1937
1938 old_num_rx_queues = adapter->req_rx_queues;
1939 old_num_tx_queues = adapter->req_tx_queues;
1940 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1941 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1942
1943 ibmvnic_cleanup(netdev);
1944
1945 if (reset_state == VNIC_OPEN &&
1946 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1947 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1948 adapter->state = VNIC_CLOSING;
1949
1950 /* Release the RTNL lock before link state change and
1951 * re-acquire after the link state change to allow
1952 * linkwatch_event to grab the RTNL lock and run during
1953 * a reset.
1954 */
1955 rtnl_unlock();
1956 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1957 rtnl_lock();
1958 if (rc)
1959 goto out;
1960
1961 if (adapter->state != VNIC_CLOSING) {
1962 rc = -1;
1963 goto out;
1964 }
1965
1966 adapter->state = VNIC_CLOSED;
1967 }
1968
1969 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1970 /* remove the closed state so when we call open it appears
1971 * we are coming from the probed state.
1972 */
1973 adapter->state = VNIC_PROBED;
1974
1975 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1976 rc = ibmvnic_reenable_crq_queue(adapter);
1977 release_sub_crqs(adapter, 1);
1978 } else {
1979 rc = ibmvnic_reset_crq(adapter);
1980 if (rc == H_CLOSED || rc == H_SUCCESS) {
1981 rc = vio_enable_interrupts(adapter->vdev);
1982 if (rc)
1983 netdev_err(adapter->netdev,
1984 "Reset failed to enable interrupts. rc=%d\n",
1985 rc);
1986 }
1987 }
1988
1989 if (rc) {
1990 netdev_err(adapter->netdev,
1991 "Reset couldn't initialize crq. rc=%d\n", rc);
1992 goto out;
1993 }
1994
1995 rc = ibmvnic_reset_init(adapter);
1996 if (rc) {
1997 rc = IBMVNIC_INIT_FAILED;
1998 goto out;
1999 }
2000
2001 /* If the adapter was in PROBE state prior to the reset,
2002 * exit here.
2003 */
2004 if (reset_state == VNIC_PROBED) {
2005 rc = 0;
2006 goto out;
2007 }
2008
2009 rc = ibmvnic_login(netdev);
2010 if (rc) {
2011 adapter->state = reset_state;
2012 goto out;
2013 }
2014
2015 if (adapter->req_rx_queues != old_num_rx_queues ||
2016 adapter->req_tx_queues != old_num_tx_queues ||
2017 adapter->req_rx_add_entries_per_subcrq !=
2018 old_num_rx_slots ||
2019 adapter->req_tx_entries_per_subcrq !=
2020 old_num_tx_slots ||
2021 !adapter->rx_pool ||
2022 !adapter->tso_pool ||
2023 !adapter->tx_pool) {
2024 release_rx_pools(adapter);
2025 release_tx_pools(adapter);
2026 release_napi(adapter);
2027 release_vpd_data(adapter);
2028
2029 rc = init_resources(adapter);
2030 if (rc)
2031 goto out;
2032
2033 } else {
2034 rc = reset_tx_pools(adapter);
2035 if (rc) {
2036 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2037 rc);
2038 goto out;
2039 }
2040
2041 rc = reset_rx_pools(adapter);
2042 if (rc) {
2043 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2044 rc);
2045 goto out;
2046 }
2047 }
2048 ibmvnic_disable_irqs(adapter);
2049 }
2050 adapter->state = VNIC_CLOSED;
2051
2052 if (reset_state == VNIC_CLOSED) {
2053 rc = 0;
2054 goto out;
2055 }
2056
2057 rc = __ibmvnic_open(netdev);
2058 if (rc) {
2059 rc = IBMVNIC_OPEN_FAILED;
2060 goto out;
2061 }
2062
2063 /* refresh device's multicast list */
2064 ibmvnic_set_multi(netdev);
2065
2066 /* kick napi */
2067 for (i = 0; i < adapter->req_rx_queues; i++)
2068 napi_schedule(&adapter->napi[i]);
2069
2070 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
2071 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2072
2073 rc = 0;
2074
2075out:
2076 rtnl_unlock();
2077
2078 return rc;
2079}
2080
2081static int do_hard_reset(struct ibmvnic_adapter *adapter,
2082 struct ibmvnic_rwi *rwi, u32 reset_state)
2083{
2084 struct net_device *netdev = adapter->netdev;
2085 int rc;
2086
2087 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2088 rwi->reset_reason);
2089
2090 netif_carrier_off(netdev);
2091 adapter->reset_reason = rwi->reset_reason;
2092
2093 ibmvnic_cleanup(netdev);
2094 release_resources(adapter);
2095 release_sub_crqs(adapter, 0);
2096 release_crq_queue(adapter);
2097
2098 /* remove the closed state so when we call open it appears
2099 * we are coming from the probed state.
2100 */
2101 adapter->state = VNIC_PROBED;
2102
2103 reinit_completion(&adapter->init_done);
2104 rc = init_crq_queue(adapter);
2105 if (rc) {
2106 netdev_err(adapter->netdev,
2107 "Couldn't initialize crq. rc=%d\n", rc);
2108 return rc;
2109 }
2110
2111 rc = ibmvnic_init(adapter);
2112 if (rc)
2113 return rc;
2114
2115 /* If the adapter was in PROBE state prior to the reset,
2116 * exit here.
2117 */
2118 if (reset_state == VNIC_PROBED)
2119 return 0;
2120
2121 rc = ibmvnic_login(netdev);
2122 if (rc) {
2123 adapter->state = VNIC_PROBED;
2124 return 0;
2125 }
2126
2127 rc = init_resources(adapter);
2128 if (rc)
2129 return rc;
2130
2131 ibmvnic_disable_irqs(adapter);
2132 adapter->state = VNIC_CLOSED;
2133
2134 if (reset_state == VNIC_CLOSED)
2135 return 0;
2136
2137 rc = __ibmvnic_open(netdev);
2138 if (rc)
2139 return IBMVNIC_OPEN_FAILED;
2140
2141 return 0;
2142}
2143
2144static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2145{
2146 struct ibmvnic_rwi *rwi;
2147 unsigned long flags;
2148
2149 spin_lock_irqsave(&adapter->rwi_lock, flags);
2150
2151 if (!list_empty(&adapter->rwi_list)) {
2152 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2153 list);
2154 list_del(&rwi->list);
2155 } else {
2156 rwi = NULL;
2157 }
2158
2159 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2160 return rwi;
2161}
2162
2163static void free_all_rwi(struct ibmvnic_adapter *adapter)
2164{
2165 struct ibmvnic_rwi *rwi;
2166
2167 rwi = get_next_rwi(adapter);
2168 while (rwi) {
2169 kfree(rwi);
2170 rwi = get_next_rwi(adapter);
2171 }
2172}
2173
2174static void __ibmvnic_reset(struct work_struct *work)
2175{
2176 struct ibmvnic_rwi *rwi;
2177 struct ibmvnic_adapter *adapter;
2178 bool saved_state = false;
2179 unsigned long flags;
2180 u32 reset_state;
2181 int rc = 0;
2182
2183 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2184
2185 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2186 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2187 IBMVNIC_RESET_DELAY);
2188 return;
2189 }
2190
2191 rwi = get_next_rwi(adapter);
2192 while (rwi) {
2193 spin_lock_irqsave(&adapter->state_lock, flags);
2194
2195 if (adapter->state == VNIC_REMOVING ||
2196 adapter->state == VNIC_REMOVED) {
2197 spin_unlock_irqrestore(&adapter->state_lock, flags);
2198 kfree(rwi);
2199 rc = EBUSY;
2200 break;
2201 }
2202
2203 if (!saved_state) {
2204 reset_state = adapter->state;
2205 adapter->state = VNIC_RESETTING;
2206 saved_state = true;
2207 }
2208 spin_unlock_irqrestore(&adapter->state_lock, flags);
2209
2210 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2211 /* CHANGE_PARAM requestor holds rtnl_lock */
2212 rc = do_change_param_reset(adapter, rwi, reset_state);
2213 } else if (adapter->force_reset_recovery) {
2214 /* Transport event occurred during previous reset */
2215 if (adapter->wait_for_reset) {
2216 /* Previous was CHANGE_PARAM; caller locked */
2217 adapter->force_reset_recovery = false;
2218 rc = do_hard_reset(adapter, rwi, reset_state);
2219 } else {
2220 rtnl_lock();
2221 adapter->force_reset_recovery = false;
2222 rc = do_hard_reset(adapter, rwi, reset_state);
2223 rtnl_unlock();
2224 }
2225 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
2226 adapter->from_passive_init)) {
2227 rc = do_reset(adapter, rwi, reset_state);
2228 }
2229 kfree(rwi);
2230 if (rc == IBMVNIC_OPEN_FAILED) {
2231 if (list_empty(&adapter->rwi_list))
2232 adapter->state = VNIC_CLOSED;
2233 else
2234 adapter->state = reset_state;
2235 rc = 0;
2236 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2237 !adapter->force_reset_recovery)
2238 break;
2239
2240 rwi = get_next_rwi(adapter);
2241
2242 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2243 rwi->reset_reason == VNIC_RESET_MOBILITY))
2244 adapter->force_reset_recovery = true;
2245 }
2246
2247 if (adapter->wait_for_reset) {
2248 adapter->reset_done_rc = rc;
2249 complete(&adapter->reset_done);
2250 }
2251
2252 if (rc) {
2253 netdev_dbg(adapter->netdev, "Reset failed\n");
2254 free_all_rwi(adapter);
2255 }
2256
2257 clear_bit_unlock(0, &adapter->resetting);
2258}
2259
2260static void __ibmvnic_delayed_reset(struct work_struct *work)
2261{
2262 struct ibmvnic_adapter *adapter;
2263
2264 adapter = container_of(work, struct ibmvnic_adapter,
2265 ibmvnic_delayed_reset.work);
2266 __ibmvnic_reset(&adapter->ibmvnic_reset);
2267}
2268
2269static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2270 enum ibmvnic_reset_reason reason)
2271{
2272 struct list_head *entry, *tmp_entry;
2273 struct ibmvnic_rwi *rwi, *tmp;
2274 struct net_device *netdev = adapter->netdev;
2275 unsigned long flags;
2276 int ret;
2277
2278 if (adapter->state == VNIC_REMOVING ||
2279 adapter->state == VNIC_REMOVED ||
2280 adapter->failover_pending) {
2281 ret = EBUSY;
2282 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2283 goto err;
2284 }
2285
2286 if (adapter->state == VNIC_PROBING) {
2287 netdev_warn(netdev, "Adapter reset during probe\n");
2288 ret = adapter->init_done_rc = EAGAIN;
2289 goto err;
2290 }
2291
2292 spin_lock_irqsave(&adapter->rwi_lock, flags);
2293
2294 list_for_each(entry, &adapter->rwi_list) {
2295 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2296 if (tmp->reset_reason == reason) {
2297 netdev_dbg(netdev, "Skipping matching reset\n");
2298 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2299 ret = EBUSY;
2300 goto err;
2301 }
2302 }
2303
2304 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2305 if (!rwi) {
2306 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2307 ibmvnic_close(netdev);
2308 ret = ENOMEM;
2309 goto err;
2310 }
2311 /* if we just received a transport event,
2312 * flush reset queue and process this reset
2313 */
2314 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2315 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2316 list_del(entry);
2317 }
2318 rwi->reset_reason = reason;
2319 list_add_tail(&rwi->list, &adapter->rwi_list);
2320 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2321 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2322 schedule_work(&adapter->ibmvnic_reset);
2323
2324 return 0;
2325err:
2326 return -ret;
2327}
2328
2329static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2330{
2331 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2332
2333 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2334}
2335
2336static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2337 struct ibmvnic_rx_buff *rx_buff)
2338{
2339 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2340
2341 rx_buff->skb = NULL;
2342
2343 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2344 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2345
2346 atomic_dec(&pool->available);
2347}
2348
2349static int ibmvnic_poll(struct napi_struct *napi, int budget)
2350{
2351 struct net_device *netdev = napi->dev;
2352 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2353 int scrq_num = (int)(napi - adapter->napi);
2354 int frames_processed = 0;
2355
2356restart_poll:
2357 while (frames_processed < budget) {
2358 struct sk_buff *skb;
2359 struct ibmvnic_rx_buff *rx_buff;
2360 union sub_crq *next;
2361 u32 length;
2362 u16 offset;
2363 u8 flags = 0;
2364
2365 if (unlikely(test_bit(0, &adapter->resetting) &&
2366 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2367 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2368 napi_complete_done(napi, frames_processed);
2369 return frames_processed;
2370 }
2371
2372 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2373 break;
2374 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2375 rx_buff =
2376 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2377 rx_comp.correlator);
2378 /* do error checking */
2379 if (next->rx_comp.rc) {
2380 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2381 be16_to_cpu(next->rx_comp.rc));
2382 /* free the entry */
2383 next->rx_comp.first = 0;
2384 dev_kfree_skb_any(rx_buff->skb);
2385 remove_buff_from_pool(adapter, rx_buff);
2386 continue;
2387 } else if (!rx_buff->skb) {
2388 /* free the entry */
2389 next->rx_comp.first = 0;
2390 remove_buff_from_pool(adapter, rx_buff);
2391 continue;
2392 }
2393
2394 length = be32_to_cpu(next->rx_comp.len);
2395 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2396 flags = next->rx_comp.flags;
2397 skb = rx_buff->skb;
2398 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2399 length);
2400
2401 /* VLAN Header has been stripped by the system firmware and
2402 * needs to be inserted by the driver
2403 */
2404 if (adapter->rx_vlan_header_insertion &&
2405 (flags & IBMVNIC_VLAN_STRIPPED))
2406 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2407 ntohs(next->rx_comp.vlan_tci));
2408
2409 /* free the entry */
2410 next->rx_comp.first = 0;
2411 remove_buff_from_pool(adapter, rx_buff);
2412
2413 skb_put(skb, length);
2414 skb->protocol = eth_type_trans(skb, netdev);
2415 skb_record_rx_queue(skb, scrq_num);
2416
2417 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2418 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2419 skb->ip_summed = CHECKSUM_UNNECESSARY;
2420 }
2421
2422 length = skb->len;
2423 napi_gro_receive(napi, skb); /* send it up */
2424 netdev->stats.rx_packets++;
2425 netdev->stats.rx_bytes += length;
2426 adapter->rx_stats_buffers[scrq_num].packets++;
2427 adapter->rx_stats_buffers[scrq_num].bytes += length;
2428 frames_processed++;
2429 }
2430
2431 if (adapter->state != VNIC_CLOSING)
2432 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2433
2434 if (frames_processed < budget) {
2435 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2436 napi_complete_done(napi, frames_processed);
2437 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2438 napi_reschedule(napi)) {
2439 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2440 goto restart_poll;
2441 }
2442 }
2443 return frames_processed;
2444}
2445
2446static int wait_for_reset(struct ibmvnic_adapter *adapter)
2447{
2448 int rc, ret;
2449
2450 adapter->fallback.mtu = adapter->req_mtu;
2451 adapter->fallback.rx_queues = adapter->req_rx_queues;
2452 adapter->fallback.tx_queues = adapter->req_tx_queues;
2453 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2454 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2455
2456 reinit_completion(&adapter->reset_done);
2457 adapter->wait_for_reset = true;
2458 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2459
2460 if (rc) {
2461 ret = rc;
2462 goto out;
2463 }
2464 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2465 if (rc) {
2466 ret = -ENODEV;
2467 goto out;
2468 }
2469
2470 ret = 0;
2471 if (adapter->reset_done_rc) {
2472 ret = -EIO;
2473 adapter->desired.mtu = adapter->fallback.mtu;
2474 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2475 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2476 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2477 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2478
2479 reinit_completion(&adapter->reset_done);
2480 adapter->wait_for_reset = true;
2481 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2482 if (rc) {
2483 ret = rc;
2484 goto out;
2485 }
2486 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2487 60000);
2488 if (rc) {
2489 ret = -ENODEV;
2490 goto out;
2491 }
2492 }
2493out:
2494 adapter->wait_for_reset = false;
2495
2496 return ret;
2497}
2498
2499static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2500{
2501 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2502
2503 adapter->desired.mtu = new_mtu + ETH_HLEN;
2504
2505 return wait_for_reset(adapter);
2506}
2507
2508static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2509 struct net_device *dev,
2510 netdev_features_t features)
2511{
2512 /* Some backing hardware adapters can not
2513 * handle packets with a MSS less than 224
2514 * or with only one segment.
2515 */
2516 if (skb_is_gso(skb)) {
2517 if (skb_shinfo(skb)->gso_size < 224 ||
2518 skb_shinfo(skb)->gso_segs == 1)
2519 features &= ~NETIF_F_GSO_MASK;
2520 }
2521
2522 return features;
2523}
2524
2525static const struct net_device_ops ibmvnic_netdev_ops = {
2526 .ndo_open = ibmvnic_open,
2527 .ndo_stop = ibmvnic_close,
2528 .ndo_start_xmit = ibmvnic_xmit,
2529 .ndo_set_rx_mode = ibmvnic_set_multi,
2530 .ndo_set_mac_address = ibmvnic_set_mac,
2531 .ndo_validate_addr = eth_validate_addr,
2532 .ndo_tx_timeout = ibmvnic_tx_timeout,
2533 .ndo_change_mtu = ibmvnic_change_mtu,
2534 .ndo_features_check = ibmvnic_features_check,
2535};
2536
2537/* ethtool functions */
2538
2539static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2540 struct ethtool_link_ksettings *cmd)
2541{
2542 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2543 int rc;
2544
2545 rc = send_query_phys_parms(adapter);
2546 if (rc) {
2547 adapter->speed = SPEED_UNKNOWN;
2548 adapter->duplex = DUPLEX_UNKNOWN;
2549 }
2550 cmd->base.speed = adapter->speed;
2551 cmd->base.duplex = adapter->duplex;
2552 cmd->base.port = PORT_FIBRE;
2553 cmd->base.phy_address = 0;
2554 cmd->base.autoneg = AUTONEG_ENABLE;
2555
2556 return 0;
2557}
2558
2559static void ibmvnic_get_drvinfo(struct net_device *netdev,
2560 struct ethtool_drvinfo *info)
2561{
2562 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2563
2564 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2565 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2566 strlcpy(info->fw_version, adapter->fw_version,
2567 sizeof(info->fw_version));
2568}
2569
2570static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2571{
2572 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2573
2574 return adapter->msg_enable;
2575}
2576
2577static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2578{
2579 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2580
2581 adapter->msg_enable = data;
2582}
2583
2584static u32 ibmvnic_get_link(struct net_device *netdev)
2585{
2586 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2587
2588 /* Don't need to send a query because we request a logical link up at
2589 * init and then we wait for link state indications
2590 */
2591 return adapter->logical_link_state;
2592}
2593
2594static void ibmvnic_get_ringparam(struct net_device *netdev,
2595 struct ethtool_ringparam *ring)
2596{
2597 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2598
2599 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2600 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2601 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2602 } else {
2603 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2604 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2605 }
2606 ring->rx_mini_max_pending = 0;
2607 ring->rx_jumbo_max_pending = 0;
2608 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2609 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2610 ring->rx_mini_pending = 0;
2611 ring->rx_jumbo_pending = 0;
2612}
2613
2614static int ibmvnic_set_ringparam(struct net_device *netdev,
2615 struct ethtool_ringparam *ring)
2616{
2617 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2618 int ret;
2619
2620 ret = 0;
2621 adapter->desired.rx_entries = ring->rx_pending;
2622 adapter->desired.tx_entries = ring->tx_pending;
2623
2624 ret = wait_for_reset(adapter);
2625
2626 if (!ret &&
2627 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2628 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2629 netdev_info(netdev,
2630 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2631 ring->rx_pending, ring->tx_pending,
2632 adapter->req_rx_add_entries_per_subcrq,
2633 adapter->req_tx_entries_per_subcrq);
2634 return ret;
2635}
2636
2637static void ibmvnic_get_channels(struct net_device *netdev,
2638 struct ethtool_channels *channels)
2639{
2640 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2641
2642 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2643 channels->max_rx = adapter->max_rx_queues;
2644 channels->max_tx = adapter->max_tx_queues;
2645 } else {
2646 channels->max_rx = IBMVNIC_MAX_QUEUES;
2647 channels->max_tx = IBMVNIC_MAX_QUEUES;
2648 }
2649
2650 channels->max_other = 0;
2651 channels->max_combined = 0;
2652 channels->rx_count = adapter->req_rx_queues;
2653 channels->tx_count = adapter->req_tx_queues;
2654 channels->other_count = 0;
2655 channels->combined_count = 0;
2656}
2657
2658static int ibmvnic_set_channels(struct net_device *netdev,
2659 struct ethtool_channels *channels)
2660{
2661 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2662 int ret;
2663
2664 ret = 0;
2665 adapter->desired.rx_queues = channels->rx_count;
2666 adapter->desired.tx_queues = channels->tx_count;
2667
2668 ret = wait_for_reset(adapter);
2669
2670 if (!ret &&
2671 (adapter->req_rx_queues != channels->rx_count ||
2672 adapter->req_tx_queues != channels->tx_count))
2673 netdev_info(netdev,
2674 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2675 channels->rx_count, channels->tx_count,
2676 adapter->req_rx_queues, adapter->req_tx_queues);
2677 return ret;
2678
2679}
2680
2681static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2682{
2683 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2684 int i;
2685
2686 switch (stringset) {
2687 case ETH_SS_STATS:
2688 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2689 i++, data += ETH_GSTRING_LEN)
2690 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2691
2692 for (i = 0; i < adapter->req_tx_queues; i++) {
2693 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2694 data += ETH_GSTRING_LEN;
2695
2696 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2697 data += ETH_GSTRING_LEN;
2698
2699 snprintf(data, ETH_GSTRING_LEN,
2700 "tx%d_dropped_packets", i);
2701 data += ETH_GSTRING_LEN;
2702 }
2703
2704 for (i = 0; i < adapter->req_rx_queues; i++) {
2705 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2706 data += ETH_GSTRING_LEN;
2707
2708 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2709 data += ETH_GSTRING_LEN;
2710
2711 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2712 data += ETH_GSTRING_LEN;
2713 }
2714 break;
2715
2716 case ETH_SS_PRIV_FLAGS:
2717 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2718 strcpy(data + i * ETH_GSTRING_LEN,
2719 ibmvnic_priv_flags[i]);
2720 break;
2721 default:
2722 return;
2723 }
2724}
2725
2726static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2727{
2728 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2729
2730 switch (sset) {
2731 case ETH_SS_STATS:
2732 return ARRAY_SIZE(ibmvnic_stats) +
2733 adapter->req_tx_queues * NUM_TX_STATS +
2734 adapter->req_rx_queues * NUM_RX_STATS;
2735 case ETH_SS_PRIV_FLAGS:
2736 return ARRAY_SIZE(ibmvnic_priv_flags);
2737 default:
2738 return -EOPNOTSUPP;
2739 }
2740}
2741
2742static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2743 struct ethtool_stats *stats, u64 *data)
2744{
2745 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2746 union ibmvnic_crq crq;
2747 int i, j;
2748 int rc;
2749
2750 memset(&crq, 0, sizeof(crq));
2751 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2752 crq.request_statistics.cmd = REQUEST_STATISTICS;
2753 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2754 crq.request_statistics.len =
2755 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2756
2757 /* Wait for data to be written */
2758 reinit_completion(&adapter->stats_done);
2759 rc = ibmvnic_send_crq(adapter, &crq);
2760 if (rc)
2761 return;
2762 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2763 if (rc)
2764 return;
2765
2766 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2767 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2768 ibmvnic_stats[i].offset));
2769
2770 for (j = 0; j < adapter->req_tx_queues; j++) {
2771 data[i] = adapter->tx_stats_buffers[j].packets;
2772 i++;
2773 data[i] = adapter->tx_stats_buffers[j].bytes;
2774 i++;
2775 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2776 i++;
2777 }
2778
2779 for (j = 0; j < adapter->req_rx_queues; j++) {
2780 data[i] = adapter->rx_stats_buffers[j].packets;
2781 i++;
2782 data[i] = adapter->rx_stats_buffers[j].bytes;
2783 i++;
2784 data[i] = adapter->rx_stats_buffers[j].interrupts;
2785 i++;
2786 }
2787}
2788
2789static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2790{
2791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2792
2793 return adapter->priv_flags;
2794}
2795
2796static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2797{
2798 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2799 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2800
2801 if (which_maxes)
2802 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2803 else
2804 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2805
2806 return 0;
2807}
2808static const struct ethtool_ops ibmvnic_ethtool_ops = {
2809 .get_drvinfo = ibmvnic_get_drvinfo,
2810 .get_msglevel = ibmvnic_get_msglevel,
2811 .set_msglevel = ibmvnic_set_msglevel,
2812 .get_link = ibmvnic_get_link,
2813 .get_ringparam = ibmvnic_get_ringparam,
2814 .set_ringparam = ibmvnic_set_ringparam,
2815 .get_channels = ibmvnic_get_channels,
2816 .set_channels = ibmvnic_set_channels,
2817 .get_strings = ibmvnic_get_strings,
2818 .get_sset_count = ibmvnic_get_sset_count,
2819 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2820 .get_link_ksettings = ibmvnic_get_link_ksettings,
2821 .get_priv_flags = ibmvnic_get_priv_flags,
2822 .set_priv_flags = ibmvnic_set_priv_flags,
2823};
2824
2825/* Routines for managing CRQs/sCRQs */
2826
2827static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2828 struct ibmvnic_sub_crq_queue *scrq)
2829{
2830 int rc;
2831
2832 if (scrq->irq) {
2833 free_irq(scrq->irq, scrq);
2834 irq_dispose_mapping(scrq->irq);
2835 scrq->irq = 0;
2836 }
2837
2838 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2839 atomic_set(&scrq->used, 0);
2840 scrq->cur = 0;
2841
2842 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2843 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2844 return rc;
2845}
2846
2847static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2848{
2849 int i, rc;
2850
2851 for (i = 0; i < adapter->req_tx_queues; i++) {
2852 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2853 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2854 if (rc)
2855 return rc;
2856 }
2857
2858 for (i = 0; i < adapter->req_rx_queues; i++) {
2859 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2860 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2861 if (rc)
2862 return rc;
2863 }
2864
2865 return rc;
2866}
2867
2868static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2869 struct ibmvnic_sub_crq_queue *scrq,
2870 bool do_h_free)
2871{
2872 struct device *dev = &adapter->vdev->dev;
2873 long rc;
2874
2875 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2876
2877 if (do_h_free) {
2878 /* Close the sub-crqs */
2879 do {
2880 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2881 adapter->vdev->unit_address,
2882 scrq->crq_num);
2883 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2884
2885 if (rc) {
2886 netdev_err(adapter->netdev,
2887 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2888 scrq->crq_num, rc);
2889 }
2890 }
2891
2892 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2893 DMA_BIDIRECTIONAL);
2894 free_pages((unsigned long)scrq->msgs, 2);
2895 kfree(scrq);
2896}
2897
2898static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2899 *adapter)
2900{
2901 struct device *dev = &adapter->vdev->dev;
2902 struct ibmvnic_sub_crq_queue *scrq;
2903 int rc;
2904
2905 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2906 if (!scrq)
2907 return NULL;
2908
2909 scrq->msgs =
2910 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2911 if (!scrq->msgs) {
2912 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2913 goto zero_page_failed;
2914 }
2915
2916 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2917 DMA_BIDIRECTIONAL);
2918 if (dma_mapping_error(dev, scrq->msg_token)) {
2919 dev_warn(dev, "Couldn't map crq queue messages page\n");
2920 goto map_failed;
2921 }
2922
2923 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2924 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2925
2926 if (rc == H_RESOURCE)
2927 rc = ibmvnic_reset_crq(adapter);
2928
2929 if (rc == H_CLOSED) {
2930 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2931 } else if (rc) {
2932 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2933 goto reg_failed;
2934 }
2935
2936 scrq->adapter = adapter;
2937 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2938 spin_lock_init(&scrq->lock);
2939
2940 netdev_dbg(adapter->netdev,
2941 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2942 scrq->crq_num, scrq->hw_irq, scrq->irq);
2943
2944 return scrq;
2945
2946reg_failed:
2947 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2948 DMA_BIDIRECTIONAL);
2949map_failed:
2950 free_pages((unsigned long)scrq->msgs, 2);
2951zero_page_failed:
2952 kfree(scrq);
2953
2954 return NULL;
2955}
2956
2957static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2958{
2959 int i;
2960
2961 if (adapter->tx_scrq) {
2962 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2963 if (!adapter->tx_scrq[i])
2964 continue;
2965
2966 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2967 i);
2968 if (adapter->tx_scrq[i]->irq) {
2969 free_irq(adapter->tx_scrq[i]->irq,
2970 adapter->tx_scrq[i]);
2971 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2972 adapter->tx_scrq[i]->irq = 0;
2973 }
2974
2975 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2976 do_h_free);
2977 }
2978
2979 kfree(adapter->tx_scrq);
2980 adapter->tx_scrq = NULL;
2981 adapter->num_active_tx_scrqs = 0;
2982 }
2983
2984 if (adapter->rx_scrq) {
2985 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2986 if (!adapter->rx_scrq[i])
2987 continue;
2988
2989 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2990 i);
2991 if (adapter->rx_scrq[i]->irq) {
2992 free_irq(adapter->rx_scrq[i]->irq,
2993 adapter->rx_scrq[i]);
2994 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2995 adapter->rx_scrq[i]->irq = 0;
2996 }
2997
2998 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2999 do_h_free);
3000 }
3001
3002 kfree(adapter->rx_scrq);
3003 adapter->rx_scrq = NULL;
3004 adapter->num_active_rx_scrqs = 0;
3005 }
3006}
3007
3008static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3009 struct ibmvnic_sub_crq_queue *scrq)
3010{
3011 struct device *dev = &adapter->vdev->dev;
3012 unsigned long rc;
3013
3014 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3015 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3016 if (rc)
3017 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3018 scrq->hw_irq, rc);
3019 return rc;
3020}
3021
3022static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3023 struct ibmvnic_sub_crq_queue *scrq)
3024{
3025 struct device *dev = &adapter->vdev->dev;
3026 unsigned long rc;
3027
3028 if (scrq->hw_irq > 0x100000000ULL) {
3029 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3030 return 1;
3031 }
3032
3033 if (test_bit(0, &adapter->resetting) &&
3034 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3035 u64 val = (0xff000000) | scrq->hw_irq;
3036
3037 rc = plpar_hcall_norets(H_EOI, val);
3038 /* H_EOI would fail with rc = H_FUNCTION when running
3039 * in XIVE mode which is expected, but not an error.
3040 */
3041 if (rc && (rc != H_FUNCTION))
3042 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3043 val, rc);
3044 }
3045
3046 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3047 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3048 if (rc)
3049 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3050 scrq->hw_irq, rc);
3051 return rc;
3052}
3053
3054static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3055 struct ibmvnic_sub_crq_queue *scrq)
3056{
3057 struct device *dev = &adapter->vdev->dev;
3058 struct ibmvnic_tx_pool *tx_pool;
3059 struct ibmvnic_tx_buff *txbuff;
3060 union sub_crq *next;
3061 int index;
3062 int i, j;
3063
3064restart_loop:
3065 while (pending_scrq(adapter, scrq)) {
3066 unsigned int pool = scrq->pool_index;
3067 int num_entries = 0;
3068
3069 next = ibmvnic_next_scrq(adapter, scrq);
3070 for (i = 0; i < next->tx_comp.num_comps; i++) {
3071 if (next->tx_comp.rcs[i]) {
3072 dev_err(dev, "tx error %x\n",
3073 next->tx_comp.rcs[i]);
3074 continue;
3075 }
3076 index = be32_to_cpu(next->tx_comp.correlators[i]);
3077 if (index & IBMVNIC_TSO_POOL_MASK) {
3078 tx_pool = &adapter->tso_pool[pool];
3079 index &= ~IBMVNIC_TSO_POOL_MASK;
3080 } else {
3081 tx_pool = &adapter->tx_pool[pool];
3082 }
3083
3084 txbuff = &tx_pool->tx_buff[index];
3085
3086 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3087 if (!txbuff->data_dma[j])
3088 continue;
3089
3090 txbuff->data_dma[j] = 0;
3091 }
3092
3093 if (txbuff->last_frag) {
3094 dev_kfree_skb_any(txbuff->skb);
3095 txbuff->skb = NULL;
3096 }
3097
3098 num_entries += txbuff->num_entries;
3099
3100 tx_pool->free_map[tx_pool->producer_index] = index;
3101 tx_pool->producer_index =
3102 (tx_pool->producer_index + 1) %
3103 tx_pool->num_buffers;
3104 }
3105 /* remove tx_comp scrq*/
3106 next->tx_comp.first = 0;
3107
3108 if (atomic_sub_return(num_entries, &scrq->used) <=
3109 (adapter->req_tx_entries_per_subcrq / 2) &&
3110 __netif_subqueue_stopped(adapter->netdev,
3111 scrq->pool_index)) {
3112 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3113 netdev_dbg(adapter->netdev, "Started queue %d\n",
3114 scrq->pool_index);
3115 }
3116 }
3117
3118 enable_scrq_irq(adapter, scrq);
3119
3120 if (pending_scrq(adapter, scrq)) {
3121 disable_scrq_irq(adapter, scrq);
3122 goto restart_loop;
3123 }
3124
3125 return 0;
3126}
3127
3128static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3129{
3130 struct ibmvnic_sub_crq_queue *scrq = instance;
3131 struct ibmvnic_adapter *adapter = scrq->adapter;
3132
3133 disable_scrq_irq(adapter, scrq);
3134 ibmvnic_complete_tx(adapter, scrq);
3135
3136 return IRQ_HANDLED;
3137}
3138
3139static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3140{
3141 struct ibmvnic_sub_crq_queue *scrq = instance;
3142 struct ibmvnic_adapter *adapter = scrq->adapter;
3143
3144 /* When booting a kdump kernel we can hit pending interrupts
3145 * prior to completing driver initialization.
3146 */
3147 if (unlikely(adapter->state != VNIC_OPEN))
3148 return IRQ_NONE;
3149
3150 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3151
3152 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3153 disable_scrq_irq(adapter, scrq);
3154 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3155 }
3156
3157 return IRQ_HANDLED;
3158}
3159
3160static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3161{
3162 struct device *dev = &adapter->vdev->dev;
3163 struct ibmvnic_sub_crq_queue *scrq;
3164 int i = 0, j = 0;
3165 int rc = 0;
3166
3167 for (i = 0; i < adapter->req_tx_queues; i++) {
3168 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3169 i);
3170 scrq = adapter->tx_scrq[i];
3171 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3172
3173 if (!scrq->irq) {
3174 rc = -EINVAL;
3175 dev_err(dev, "Error mapping irq\n");
3176 goto req_tx_irq_failed;
3177 }
3178
3179 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3180 adapter->vdev->unit_address, i);
3181 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3182 0, scrq->name, scrq);
3183
3184 if (rc) {
3185 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3186 scrq->irq, rc);
3187 irq_dispose_mapping(scrq->irq);
3188 goto req_tx_irq_failed;
3189 }
3190 }
3191
3192 for (i = 0; i < adapter->req_rx_queues; i++) {
3193 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3194 i);
3195 scrq = adapter->rx_scrq[i];
3196 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3197 if (!scrq->irq) {
3198 rc = -EINVAL;
3199 dev_err(dev, "Error mapping irq\n");
3200 goto req_rx_irq_failed;
3201 }
3202 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3203 adapter->vdev->unit_address, i);
3204 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3205 0, scrq->name, scrq);
3206 if (rc) {
3207 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3208 scrq->irq, rc);
3209 irq_dispose_mapping(scrq->irq);
3210 goto req_rx_irq_failed;
3211 }
3212 }
3213 return rc;
3214
3215req_rx_irq_failed:
3216 for (j = 0; j < i; j++) {
3217 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3218 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3219 }
3220 i = adapter->req_tx_queues;
3221req_tx_irq_failed:
3222 for (j = 0; j < i; j++) {
3223 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3224 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3225 }
3226 release_sub_crqs(adapter, 1);
3227 return rc;
3228}
3229
3230static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3231{
3232 struct device *dev = &adapter->vdev->dev;
3233 struct ibmvnic_sub_crq_queue **allqueues;
3234 int registered_queues = 0;
3235 int total_queues;
3236 int more = 0;
3237 int i;
3238
3239 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3240
3241 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3242 if (!allqueues)
3243 return -1;
3244
3245 for (i = 0; i < total_queues; i++) {
3246 allqueues[i] = init_sub_crq_queue(adapter);
3247 if (!allqueues[i]) {
3248 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3249 break;
3250 }
3251 registered_queues++;
3252 }
3253
3254 /* Make sure we were able to register the minimum number of queues */
3255 if (registered_queues <
3256 adapter->min_tx_queues + adapter->min_rx_queues) {
3257 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3258 goto tx_failed;
3259 }
3260
3261 /* Distribute the failed allocated queues*/
3262 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3263 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3264 switch (i % 3) {
3265 case 0:
3266 if (adapter->req_rx_queues > adapter->min_rx_queues)
3267 adapter->req_rx_queues--;
3268 else
3269 more++;
3270 break;
3271 case 1:
3272 if (adapter->req_tx_queues > adapter->min_tx_queues)
3273 adapter->req_tx_queues--;
3274 else
3275 more++;
3276 break;
3277 }
3278 }
3279
3280 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3281 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3282 if (!adapter->tx_scrq)
3283 goto tx_failed;
3284
3285 for (i = 0; i < adapter->req_tx_queues; i++) {
3286 adapter->tx_scrq[i] = allqueues[i];
3287 adapter->tx_scrq[i]->pool_index = i;
3288 adapter->num_active_tx_scrqs++;
3289 }
3290
3291 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3292 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3293 if (!adapter->rx_scrq)
3294 goto rx_failed;
3295
3296 for (i = 0; i < adapter->req_rx_queues; i++) {
3297 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3298 adapter->rx_scrq[i]->scrq_num = i;
3299 adapter->num_active_rx_scrqs++;
3300 }
3301
3302 kfree(allqueues);
3303 return 0;
3304
3305rx_failed:
3306 kfree(adapter->tx_scrq);
3307 adapter->tx_scrq = NULL;
3308tx_failed:
3309 for (i = 0; i < registered_queues; i++)
3310 release_sub_crq_queue(adapter, allqueues[i], 1);
3311 kfree(allqueues);
3312 return -1;
3313}
3314
3315static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3316{
3317 struct device *dev = &adapter->vdev->dev;
3318 union ibmvnic_crq crq;
3319 int max_entries;
3320
3321 if (!retry) {
3322 /* Sub-CRQ entries are 32 byte long */
3323 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3324
3325 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3326 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3327 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3328 return;
3329 }
3330
3331 if (adapter->desired.mtu)
3332 adapter->req_mtu = adapter->desired.mtu;
3333 else
3334 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3335
3336 if (!adapter->desired.tx_entries)
3337 adapter->desired.tx_entries =
3338 adapter->max_tx_entries_per_subcrq;
3339 if (!adapter->desired.rx_entries)
3340 adapter->desired.rx_entries =
3341 adapter->max_rx_add_entries_per_subcrq;
3342
3343 max_entries = IBMVNIC_MAX_LTB_SIZE /
3344 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3345
3346 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3347 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3348 adapter->desired.tx_entries = max_entries;
3349 }
3350
3351 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3352 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3353 adapter->desired.rx_entries = max_entries;
3354 }
3355
3356 if (adapter->desired.tx_entries)
3357 adapter->req_tx_entries_per_subcrq =
3358 adapter->desired.tx_entries;
3359 else
3360 adapter->req_tx_entries_per_subcrq =
3361 adapter->max_tx_entries_per_subcrq;
3362
3363 if (adapter->desired.rx_entries)
3364 adapter->req_rx_add_entries_per_subcrq =
3365 adapter->desired.rx_entries;
3366 else
3367 adapter->req_rx_add_entries_per_subcrq =
3368 adapter->max_rx_add_entries_per_subcrq;
3369
3370 if (adapter->desired.tx_queues)
3371 adapter->req_tx_queues =
3372 adapter->desired.tx_queues;
3373 else
3374 adapter->req_tx_queues =
3375 adapter->opt_tx_comp_sub_queues;
3376
3377 if (adapter->desired.rx_queues)
3378 adapter->req_rx_queues =
3379 adapter->desired.rx_queues;
3380 else
3381 adapter->req_rx_queues =
3382 adapter->opt_rx_comp_queues;
3383
3384 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3385 }
3386
3387 memset(&crq, 0, sizeof(crq));
3388 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3389 crq.request_capability.cmd = REQUEST_CAPABILITY;
3390
3391 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3392 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3393 atomic_inc(&adapter->running_cap_crqs);
3394 ibmvnic_send_crq(adapter, &crq);
3395
3396 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3397 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3398 atomic_inc(&adapter->running_cap_crqs);
3399 ibmvnic_send_crq(adapter, &crq);
3400
3401 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3402 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3403 atomic_inc(&adapter->running_cap_crqs);
3404 ibmvnic_send_crq(adapter, &crq);
3405
3406 crq.request_capability.capability =
3407 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3408 crq.request_capability.number =
3409 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3410 atomic_inc(&adapter->running_cap_crqs);
3411 ibmvnic_send_crq(adapter, &crq);
3412
3413 crq.request_capability.capability =
3414 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3415 crq.request_capability.number =
3416 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3417 atomic_inc(&adapter->running_cap_crqs);
3418 ibmvnic_send_crq(adapter, &crq);
3419
3420 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3421 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3422 atomic_inc(&adapter->running_cap_crqs);
3423 ibmvnic_send_crq(adapter, &crq);
3424
3425 if (adapter->netdev->flags & IFF_PROMISC) {
3426 if (adapter->promisc_supported) {
3427 crq.request_capability.capability =
3428 cpu_to_be16(PROMISC_REQUESTED);
3429 crq.request_capability.number = cpu_to_be64(1);
3430 atomic_inc(&adapter->running_cap_crqs);
3431 ibmvnic_send_crq(adapter, &crq);
3432 }
3433 } else {
3434 crq.request_capability.capability =
3435 cpu_to_be16(PROMISC_REQUESTED);
3436 crq.request_capability.number = cpu_to_be64(0);
3437 atomic_inc(&adapter->running_cap_crqs);
3438 ibmvnic_send_crq(adapter, &crq);
3439 }
3440}
3441
3442static int pending_scrq(struct ibmvnic_adapter *adapter,
3443 struct ibmvnic_sub_crq_queue *scrq)
3444{
3445 union sub_crq *entry = &scrq->msgs[scrq->cur];
3446
3447 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3448 return 1;
3449 else
3450 return 0;
3451}
3452
3453static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3454 struct ibmvnic_sub_crq_queue *scrq)
3455{
3456 union sub_crq *entry;
3457 unsigned long flags;
3458
3459 spin_lock_irqsave(&scrq->lock, flags);
3460 entry = &scrq->msgs[scrq->cur];
3461 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3462 if (++scrq->cur == scrq->size)
3463 scrq->cur = 0;
3464 } else {
3465 entry = NULL;
3466 }
3467 spin_unlock_irqrestore(&scrq->lock, flags);
3468
3469 return entry;
3470}
3471
3472static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3473{
3474 struct ibmvnic_crq_queue *queue = &adapter->crq;
3475 union ibmvnic_crq *crq;
3476
3477 crq = &queue->msgs[queue->cur];
3478 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3479 if (++queue->cur == queue->size)
3480 queue->cur = 0;
3481 } else {
3482 crq = NULL;
3483 }
3484
3485 return crq;
3486}
3487
3488static void print_subcrq_error(struct device *dev, int rc, const char *func)
3489{
3490 switch (rc) {
3491 case H_PARAMETER:
3492 dev_warn_ratelimited(dev,
3493 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3494 func, rc);
3495 break;
3496 case H_CLOSED:
3497 dev_warn_ratelimited(dev,
3498 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3499 func, rc);
3500 break;
3501 default:
3502 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3503 break;
3504 }
3505}
3506
3507static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3508 union sub_crq *sub_crq)
3509{
3510 unsigned int ua = adapter->vdev->unit_address;
3511 struct device *dev = &adapter->vdev->dev;
3512 u64 *u64_crq = (u64 *)sub_crq;
3513 int rc;
3514
3515 netdev_dbg(adapter->netdev,
3516 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3517 (unsigned long int)cpu_to_be64(remote_handle),
3518 (unsigned long int)cpu_to_be64(u64_crq[0]),
3519 (unsigned long int)cpu_to_be64(u64_crq[1]),
3520 (unsigned long int)cpu_to_be64(u64_crq[2]),
3521 (unsigned long int)cpu_to_be64(u64_crq[3]));
3522
3523 /* Make sure the hypervisor sees the complete request */
3524 mb();
3525
3526 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3527 cpu_to_be64(remote_handle),
3528 cpu_to_be64(u64_crq[0]),
3529 cpu_to_be64(u64_crq[1]),
3530 cpu_to_be64(u64_crq[2]),
3531 cpu_to_be64(u64_crq[3]));
3532
3533 if (rc)
3534 print_subcrq_error(dev, rc, __func__);
3535
3536 return rc;
3537}
3538
3539static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3540 u64 remote_handle, u64 ioba, u64 num_entries)
3541{
3542 unsigned int ua = adapter->vdev->unit_address;
3543 struct device *dev = &adapter->vdev->dev;
3544 int rc;
3545
3546 /* Make sure the hypervisor sees the complete request */
3547 mb();
3548 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3549 cpu_to_be64(remote_handle),
3550 ioba, num_entries);
3551
3552 if (rc)
3553 print_subcrq_error(dev, rc, __func__);
3554
3555 return rc;
3556}
3557
3558static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3559 union ibmvnic_crq *crq)
3560{
3561 unsigned int ua = adapter->vdev->unit_address;
3562 struct device *dev = &adapter->vdev->dev;
3563 u64 *u64_crq = (u64 *)crq;
3564 int rc;
3565
3566 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3567 (unsigned long int)cpu_to_be64(u64_crq[0]),
3568 (unsigned long int)cpu_to_be64(u64_crq[1]));
3569
3570 if (!adapter->crq.active &&
3571 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3572 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3573 return -EINVAL;
3574 }
3575
3576 /* Make sure the hypervisor sees the complete request */
3577 mb();
3578
3579 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3580 cpu_to_be64(u64_crq[0]),
3581 cpu_to_be64(u64_crq[1]));
3582
3583 if (rc) {
3584 if (rc == H_CLOSED) {
3585 dev_warn(dev, "CRQ Queue closed\n");
3586 if (test_bit(0, &adapter->resetting))
3587 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3588 }
3589
3590 dev_warn(dev, "Send error (rc=%d)\n", rc);
3591 }
3592
3593 return rc;
3594}
3595
3596static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3597{
3598 union ibmvnic_crq crq;
3599
3600 memset(&crq, 0, sizeof(crq));
3601 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3602 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3603 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3604
3605 return ibmvnic_send_crq(adapter, &crq);
3606}
3607
3608static int send_version_xchg(struct ibmvnic_adapter *adapter)
3609{
3610 union ibmvnic_crq crq;
3611
3612 memset(&crq, 0, sizeof(crq));
3613 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3614 crq.version_exchange.cmd = VERSION_EXCHANGE;
3615 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3616
3617 return ibmvnic_send_crq(adapter, &crq);
3618}
3619
3620struct vnic_login_client_data {
3621 u8 type;
3622 __be16 len;
3623 char name[];
3624} __packed;
3625
3626static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3627{
3628 int len;
3629
3630 /* Calculate the amount of buffer space needed for the
3631 * vnic client data in the login buffer. There are four entries,
3632 * OS name, LPAR name, device name, and a null last entry.
3633 */
3634 len = 4 * sizeof(struct vnic_login_client_data);
3635 len += 6; /* "Linux" plus NULL */
3636 len += strlen(utsname()->nodename) + 1;
3637 len += strlen(adapter->netdev->name) + 1;
3638
3639 return len;
3640}
3641
3642static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3643 struct vnic_login_client_data *vlcd)
3644{
3645 const char *os_name = "Linux";
3646 int len;
3647
3648 /* Type 1 - LPAR OS */
3649 vlcd->type = 1;
3650 len = strlen(os_name) + 1;
3651 vlcd->len = cpu_to_be16(len);
3652 strncpy(vlcd->name, os_name, len);
3653 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3654
3655 /* Type 2 - LPAR name */
3656 vlcd->type = 2;
3657 len = strlen(utsname()->nodename) + 1;
3658 vlcd->len = cpu_to_be16(len);
3659 strncpy(vlcd->name, utsname()->nodename, len);
3660 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3661
3662 /* Type 3 - device name */
3663 vlcd->type = 3;
3664 len = strlen(adapter->netdev->name) + 1;
3665 vlcd->len = cpu_to_be16(len);
3666 strncpy(vlcd->name, adapter->netdev->name, len);
3667}
3668
3669static int send_login(struct ibmvnic_adapter *adapter)
3670{
3671 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3672 struct ibmvnic_login_buffer *login_buffer;
3673 struct device *dev = &adapter->vdev->dev;
3674 dma_addr_t rsp_buffer_token;
3675 dma_addr_t buffer_token;
3676 size_t rsp_buffer_size;
3677 union ibmvnic_crq crq;
3678 size_t buffer_size;
3679 __be64 *tx_list_p;
3680 __be64 *rx_list_p;
3681 int client_data_len;
3682 struct vnic_login_client_data *vlcd;
3683 int i;
3684
3685 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3686 netdev_err(adapter->netdev,
3687 "RX or TX queues are not allocated, device login failed\n");
3688 return -1;
3689 }
3690
3691 release_login_rsp_buffer(adapter);
3692 client_data_len = vnic_client_data_len(adapter);
3693
3694 buffer_size =
3695 sizeof(struct ibmvnic_login_buffer) +
3696 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3697 client_data_len;
3698
3699 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3700 if (!login_buffer)
3701 goto buf_alloc_failed;
3702
3703 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3704 DMA_TO_DEVICE);
3705 if (dma_mapping_error(dev, buffer_token)) {
3706 dev_err(dev, "Couldn't map login buffer\n");
3707 goto buf_map_failed;
3708 }
3709
3710 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3711 sizeof(u64) * adapter->req_tx_queues +
3712 sizeof(u64) * adapter->req_rx_queues +
3713 sizeof(u64) * adapter->req_rx_queues +
3714 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3715
3716 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3717 if (!login_rsp_buffer)
3718 goto buf_rsp_alloc_failed;
3719
3720 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3721 rsp_buffer_size, DMA_FROM_DEVICE);
3722 if (dma_mapping_error(dev, rsp_buffer_token)) {
3723 dev_err(dev, "Couldn't map login rsp buffer\n");
3724 goto buf_rsp_map_failed;
3725 }
3726
3727 adapter->login_buf = login_buffer;
3728 adapter->login_buf_token = buffer_token;
3729 adapter->login_buf_sz = buffer_size;
3730 adapter->login_rsp_buf = login_rsp_buffer;
3731 adapter->login_rsp_buf_token = rsp_buffer_token;
3732 adapter->login_rsp_buf_sz = rsp_buffer_size;
3733
3734 login_buffer->len = cpu_to_be32(buffer_size);
3735 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3736 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3737 login_buffer->off_txcomp_subcrqs =
3738 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3739 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3740 login_buffer->off_rxcomp_subcrqs =
3741 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3742 sizeof(u64) * adapter->req_tx_queues);
3743 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3744 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3745
3746 tx_list_p = (__be64 *)((char *)login_buffer +
3747 sizeof(struct ibmvnic_login_buffer));
3748 rx_list_p = (__be64 *)((char *)login_buffer +
3749 sizeof(struct ibmvnic_login_buffer) +
3750 sizeof(u64) * adapter->req_tx_queues);
3751
3752 for (i = 0; i < adapter->req_tx_queues; i++) {
3753 if (adapter->tx_scrq[i]) {
3754 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3755 crq_num);
3756 }
3757 }
3758
3759 for (i = 0; i < adapter->req_rx_queues; i++) {
3760 if (adapter->rx_scrq[i]) {
3761 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3762 crq_num);
3763 }
3764 }
3765
3766 /* Insert vNIC login client data */
3767 vlcd = (struct vnic_login_client_data *)
3768 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3769 login_buffer->client_data_offset =
3770 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3771 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3772
3773 vnic_add_client_data(adapter, vlcd);
3774
3775 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3776 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3777 netdev_dbg(adapter->netdev, "%016lx\n",
3778 ((unsigned long int *)(adapter->login_buf))[i]);
3779 }
3780
3781 memset(&crq, 0, sizeof(crq));
3782 crq.login.first = IBMVNIC_CRQ_CMD;
3783 crq.login.cmd = LOGIN;
3784 crq.login.ioba = cpu_to_be32(buffer_token);
3785 crq.login.len = cpu_to_be32(buffer_size);
3786 ibmvnic_send_crq(adapter, &crq);
3787
3788 return 0;
3789
3790buf_rsp_map_failed:
3791 kfree(login_rsp_buffer);
3792buf_rsp_alloc_failed:
3793 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3794buf_map_failed:
3795 kfree(login_buffer);
3796buf_alloc_failed:
3797 return -1;
3798}
3799
3800static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3801 u32 len, u8 map_id)
3802{
3803 union ibmvnic_crq crq;
3804
3805 memset(&crq, 0, sizeof(crq));
3806 crq.request_map.first = IBMVNIC_CRQ_CMD;
3807 crq.request_map.cmd = REQUEST_MAP;
3808 crq.request_map.map_id = map_id;
3809 crq.request_map.ioba = cpu_to_be32(addr);
3810 crq.request_map.len = cpu_to_be32(len);
3811 return ibmvnic_send_crq(adapter, &crq);
3812}
3813
3814static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3815{
3816 union ibmvnic_crq crq;
3817
3818 memset(&crq, 0, sizeof(crq));
3819 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3820 crq.request_unmap.cmd = REQUEST_UNMAP;
3821 crq.request_unmap.map_id = map_id;
3822 return ibmvnic_send_crq(adapter, &crq);
3823}
3824
3825static void send_map_query(struct ibmvnic_adapter *adapter)
3826{
3827 union ibmvnic_crq crq;
3828
3829 memset(&crq, 0, sizeof(crq));
3830 crq.query_map.first = IBMVNIC_CRQ_CMD;
3831 crq.query_map.cmd = QUERY_MAP;
3832 ibmvnic_send_crq(adapter, &crq);
3833}
3834
3835/* Send a series of CRQs requesting various capabilities of the VNIC server */
3836static void send_cap_queries(struct ibmvnic_adapter *adapter)
3837{
3838 union ibmvnic_crq crq;
3839
3840 atomic_set(&adapter->running_cap_crqs, 0);
3841 memset(&crq, 0, sizeof(crq));
3842 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3843 crq.query_capability.cmd = QUERY_CAPABILITY;
3844
3845 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3846 atomic_inc(&adapter->running_cap_crqs);
3847 ibmvnic_send_crq(adapter, &crq);
3848
3849 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3850 atomic_inc(&adapter->running_cap_crqs);
3851 ibmvnic_send_crq(adapter, &crq);
3852
3853 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3854 atomic_inc(&adapter->running_cap_crqs);
3855 ibmvnic_send_crq(adapter, &crq);
3856
3857 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3858 atomic_inc(&adapter->running_cap_crqs);
3859 ibmvnic_send_crq(adapter, &crq);
3860
3861 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3862 atomic_inc(&adapter->running_cap_crqs);
3863 ibmvnic_send_crq(adapter, &crq);
3864
3865 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3866 atomic_inc(&adapter->running_cap_crqs);
3867 ibmvnic_send_crq(adapter, &crq);
3868
3869 crq.query_capability.capability =
3870 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3871 atomic_inc(&adapter->running_cap_crqs);
3872 ibmvnic_send_crq(adapter, &crq);
3873
3874 crq.query_capability.capability =
3875 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3876 atomic_inc(&adapter->running_cap_crqs);
3877 ibmvnic_send_crq(adapter, &crq);
3878
3879 crq.query_capability.capability =
3880 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3881 atomic_inc(&adapter->running_cap_crqs);
3882 ibmvnic_send_crq(adapter, &crq);
3883
3884 crq.query_capability.capability =
3885 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3886 atomic_inc(&adapter->running_cap_crqs);
3887 ibmvnic_send_crq(adapter, &crq);
3888
3889 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3890 atomic_inc(&adapter->running_cap_crqs);
3891 ibmvnic_send_crq(adapter, &crq);
3892
3893 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3894 atomic_inc(&adapter->running_cap_crqs);
3895 ibmvnic_send_crq(adapter, &crq);
3896
3897 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3898 atomic_inc(&adapter->running_cap_crqs);
3899 ibmvnic_send_crq(adapter, &crq);
3900
3901 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3902 atomic_inc(&adapter->running_cap_crqs);
3903 ibmvnic_send_crq(adapter, &crq);
3904
3905 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3906 atomic_inc(&adapter->running_cap_crqs);
3907 ibmvnic_send_crq(adapter, &crq);
3908
3909 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3910 atomic_inc(&adapter->running_cap_crqs);
3911 ibmvnic_send_crq(adapter, &crq);
3912
3913 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3914 atomic_inc(&adapter->running_cap_crqs);
3915 ibmvnic_send_crq(adapter, &crq);
3916
3917 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3918 atomic_inc(&adapter->running_cap_crqs);
3919 ibmvnic_send_crq(adapter, &crq);
3920
3921 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3922 atomic_inc(&adapter->running_cap_crqs);
3923 ibmvnic_send_crq(adapter, &crq);
3924
3925 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3926 atomic_inc(&adapter->running_cap_crqs);
3927 ibmvnic_send_crq(adapter, &crq);
3928
3929 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3930 atomic_inc(&adapter->running_cap_crqs);
3931 ibmvnic_send_crq(adapter, &crq);
3932
3933 crq.query_capability.capability =
3934 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3935 atomic_inc(&adapter->running_cap_crqs);
3936 ibmvnic_send_crq(adapter, &crq);
3937
3938 crq.query_capability.capability =
3939 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3940 atomic_inc(&adapter->running_cap_crqs);
3941 ibmvnic_send_crq(adapter, &crq);
3942
3943 crq.query_capability.capability =
3944 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3945 atomic_inc(&adapter->running_cap_crqs);
3946 ibmvnic_send_crq(adapter, &crq);
3947
3948 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3949 atomic_inc(&adapter->running_cap_crqs);
3950 ibmvnic_send_crq(adapter, &crq);
3951}
3952
3953static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3954 struct ibmvnic_adapter *adapter)
3955{
3956 struct device *dev = &adapter->vdev->dev;
3957
3958 if (crq->get_vpd_size_rsp.rc.code) {
3959 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3960 crq->get_vpd_size_rsp.rc.code);
3961 complete(&adapter->fw_done);
3962 return;
3963 }
3964
3965 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3966 complete(&adapter->fw_done);
3967}
3968
3969static void handle_vpd_rsp(union ibmvnic_crq *crq,
3970 struct ibmvnic_adapter *adapter)
3971{
3972 struct device *dev = &adapter->vdev->dev;
3973 unsigned char *substr = NULL;
3974 u8 fw_level_len = 0;
3975
3976 memset(adapter->fw_version, 0, 32);
3977
3978 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3979 DMA_FROM_DEVICE);
3980
3981 if (crq->get_vpd_rsp.rc.code) {
3982 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3983 crq->get_vpd_rsp.rc.code);
3984 goto complete;
3985 }
3986
3987 /* get the position of the firmware version info
3988 * located after the ASCII 'RM' substring in the buffer
3989 */
3990 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3991 if (!substr) {
3992 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3993 goto complete;
3994 }
3995
3996 /* get length of firmware level ASCII substring */
3997 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3998 fw_level_len = *(substr + 2);
3999 } else {
4000 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4001 goto complete;
4002 }
4003
4004 /* copy firmware version string from vpd into adapter */
4005 if ((substr + 3 + fw_level_len) <
4006 (adapter->vpd->buff + adapter->vpd->len)) {
4007 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4008 } else {
4009 dev_info(dev, "FW substr extrapolated VPD buff\n");
4010 }
4011
4012complete:
4013 if (adapter->fw_version[0] == '\0')
4014 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4015 complete(&adapter->fw_done);
4016}
4017
4018static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4019{
4020 struct device *dev = &adapter->vdev->dev;
4021 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4022 netdev_features_t old_hw_features = 0;
4023 union ibmvnic_crq crq;
4024 int i;
4025
4026 dma_unmap_single(dev, adapter->ip_offload_tok,
4027 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4028
4029 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4030 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4031 netdev_dbg(adapter->netdev, "%016lx\n",
4032 ((unsigned long int *)(buf))[i]);
4033
4034 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4035 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4036 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4037 buf->tcp_ipv4_chksum);
4038 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4039 buf->tcp_ipv6_chksum);
4040 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4041 buf->udp_ipv4_chksum);
4042 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4043 buf->udp_ipv6_chksum);
4044 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4045 buf->large_tx_ipv4);
4046 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4047 buf->large_tx_ipv6);
4048 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4049 buf->large_rx_ipv4);
4050 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4051 buf->large_rx_ipv6);
4052 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4053 buf->max_ipv4_header_size);
4054 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4055 buf->max_ipv6_header_size);
4056 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4057 buf->max_tcp_header_size);
4058 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4059 buf->max_udp_header_size);
4060 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4061 buf->max_large_tx_size);
4062 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4063 buf->max_large_rx_size);
4064 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4065 buf->ipv6_extension_header);
4066 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4067 buf->tcp_pseudosum_req);
4068 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4069 buf->num_ipv6_ext_headers);
4070 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4071 buf->off_ipv6_ext_headers);
4072
4073 adapter->ip_offload_ctrl_tok =
4074 dma_map_single(dev, &adapter->ip_offload_ctrl,
4075 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
4076
4077 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4078 dev_err(dev, "Couldn't map ip offload control buffer\n");
4079 return;
4080 }
4081
4082 adapter->ip_offload_ctrl.len =
4083 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4084 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
4085 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
4086 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
4087 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4088 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
4089 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4090 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
4091 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
4092 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
4093
4094 /* large_rx disabled for now, additional features needed */
4095 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
4096 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
4097
4098 if (adapter->state != VNIC_PROBING) {
4099 old_hw_features = adapter->netdev->hw_features;
4100 adapter->netdev->hw_features = 0;
4101 }
4102
4103 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4104
4105 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4106 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4107
4108 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4109 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4110
4111 if ((adapter->netdev->features &
4112 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4113 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4114
4115 if (buf->large_tx_ipv4)
4116 adapter->netdev->hw_features |= NETIF_F_TSO;
4117 if (buf->large_tx_ipv6)
4118 adapter->netdev->hw_features |= NETIF_F_TSO6;
4119
4120 if (adapter->state == VNIC_PROBING) {
4121 adapter->netdev->features |= adapter->netdev->hw_features;
4122 } else if (old_hw_features != adapter->netdev->hw_features) {
4123 netdev_features_t tmp = 0;
4124
4125 /* disable features no longer supported */
4126 adapter->netdev->features &= adapter->netdev->hw_features;
4127 /* turn on features now supported if previously enabled */
4128 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4129 adapter->netdev->hw_features;
4130 adapter->netdev->features |=
4131 tmp & adapter->netdev->wanted_features;
4132 }
4133
4134 memset(&crq, 0, sizeof(crq));
4135 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4136 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4137 crq.control_ip_offload.len =
4138 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4139 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4140 ibmvnic_send_crq(adapter, &crq);
4141}
4142
4143static const char *ibmvnic_fw_err_cause(u16 cause)
4144{
4145 switch (cause) {
4146 case ADAPTER_PROBLEM:
4147 return "adapter problem";
4148 case BUS_PROBLEM:
4149 return "bus problem";
4150 case FW_PROBLEM:
4151 return "firmware problem";
4152 case DD_PROBLEM:
4153 return "device driver problem";
4154 case EEH_RECOVERY:
4155 return "EEH recovery";
4156 case FW_UPDATED:
4157 return "firmware updated";
4158 case LOW_MEMORY:
4159 return "low Memory";
4160 default:
4161 return "unknown";
4162 }
4163}
4164
4165static void handle_error_indication(union ibmvnic_crq *crq,
4166 struct ibmvnic_adapter *adapter)
4167{
4168 struct device *dev = &adapter->vdev->dev;
4169 u16 cause;
4170
4171 cause = be16_to_cpu(crq->error_indication.error_cause);
4172
4173 dev_warn_ratelimited(dev,
4174 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4175 crq->error_indication.flags
4176 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4177 ibmvnic_fw_err_cause(cause));
4178
4179 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4180 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4181 else
4182 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4183}
4184
4185static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4186 struct ibmvnic_adapter *adapter)
4187{
4188 struct net_device *netdev = adapter->netdev;
4189 struct device *dev = &adapter->vdev->dev;
4190 long rc;
4191
4192 rc = crq->change_mac_addr_rsp.rc.code;
4193 if (rc) {
4194 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4195 goto out;
4196 }
4197 ether_addr_copy(netdev->dev_addr,
4198 &crq->change_mac_addr_rsp.mac_addr[0]);
4199out:
4200 complete(&adapter->fw_done);
4201 return rc;
4202}
4203
4204static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4205 struct ibmvnic_adapter *adapter)
4206{
4207 struct device *dev = &adapter->vdev->dev;
4208 u64 *req_value;
4209 char *name;
4210
4211 atomic_dec(&adapter->running_cap_crqs);
4212 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4213 case REQ_TX_QUEUES:
4214 req_value = &adapter->req_tx_queues;
4215 name = "tx";
4216 break;
4217 case REQ_RX_QUEUES:
4218 req_value = &adapter->req_rx_queues;
4219 name = "rx";
4220 break;
4221 case REQ_RX_ADD_QUEUES:
4222 req_value = &adapter->req_rx_add_queues;
4223 name = "rx_add";
4224 break;
4225 case REQ_TX_ENTRIES_PER_SUBCRQ:
4226 req_value = &adapter->req_tx_entries_per_subcrq;
4227 name = "tx_entries_per_subcrq";
4228 break;
4229 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4230 req_value = &adapter->req_rx_add_entries_per_subcrq;
4231 name = "rx_add_entries_per_subcrq";
4232 break;
4233 case REQ_MTU:
4234 req_value = &adapter->req_mtu;
4235 name = "mtu";
4236 break;
4237 case PROMISC_REQUESTED:
4238 req_value = &adapter->promisc;
4239 name = "promisc";
4240 break;
4241 default:
4242 dev_err(dev, "Got invalid cap request rsp %d\n",
4243 crq->request_capability.capability);
4244 return;
4245 }
4246
4247 switch (crq->request_capability_rsp.rc.code) {
4248 case SUCCESS:
4249 break;
4250 case PARTIALSUCCESS:
4251 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4252 *req_value,
4253 (long int)be64_to_cpu(crq->request_capability_rsp.
4254 number), name);
4255
4256 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4257 REQ_MTU) {
4258 pr_err("mtu of %llu is not supported. Reverting.\n",
4259 *req_value);
4260 *req_value = adapter->fallback.mtu;
4261 } else {
4262 *req_value =
4263 be64_to_cpu(crq->request_capability_rsp.number);
4264 }
4265
4266 ibmvnic_send_req_caps(adapter, 1);
4267 return;
4268 default:
4269 dev_err(dev, "Error %d in request cap rsp\n",
4270 crq->request_capability_rsp.rc.code);
4271 return;
4272 }
4273
4274 /* Done receiving requested capabilities, query IP offload support */
4275 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4276 union ibmvnic_crq newcrq;
4277 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4278 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4279 &adapter->ip_offload_buf;
4280
4281 adapter->wait_capability = false;
4282 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4283 buf_sz,
4284 DMA_FROM_DEVICE);
4285
4286 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4287 if (!firmware_has_feature(FW_FEATURE_CMO))
4288 dev_err(dev, "Couldn't map offload buffer\n");
4289 return;
4290 }
4291
4292 memset(&newcrq, 0, sizeof(newcrq));
4293 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4294 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4295 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4296 newcrq.query_ip_offload.ioba =
4297 cpu_to_be32(adapter->ip_offload_tok);
4298
4299 ibmvnic_send_crq(adapter, &newcrq);
4300 }
4301}
4302
4303static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4304 struct ibmvnic_adapter *adapter)
4305{
4306 struct device *dev = &adapter->vdev->dev;
4307 struct net_device *netdev = adapter->netdev;
4308 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4309 struct ibmvnic_login_buffer *login = adapter->login_buf;
4310 int i;
4311
4312 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4313 DMA_TO_DEVICE);
4314 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4315 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4316
4317 /* If the number of queues requested can't be allocated by the
4318 * server, the login response will return with code 1. We will need
4319 * to resend the login buffer with fewer queues requested.
4320 */
4321 if (login_rsp_crq->generic.rc.code) {
4322 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4323 complete(&adapter->init_done);
4324 return 0;
4325 }
4326
4327 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4328
4329 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4330 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4331 netdev_dbg(adapter->netdev, "%016lx\n",
4332 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4333 }
4334
4335 /* Sanity checks */
4336 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4337 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4338 adapter->req_rx_add_queues !=
4339 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4340 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4341 ibmvnic_remove(adapter->vdev);
4342 return -EIO;
4343 }
4344 release_login_buffer(adapter);
4345 complete(&adapter->init_done);
4346
4347 return 0;
4348}
4349
4350static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4351 struct ibmvnic_adapter *adapter)
4352{
4353 struct device *dev = &adapter->vdev->dev;
4354 long rc;
4355
4356 rc = crq->request_unmap_rsp.rc.code;
4357 if (rc)
4358 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4359}
4360
4361static void handle_query_map_rsp(union ibmvnic_crq *crq,
4362 struct ibmvnic_adapter *adapter)
4363{
4364 struct net_device *netdev = adapter->netdev;
4365 struct device *dev = &adapter->vdev->dev;
4366 long rc;
4367
4368 rc = crq->query_map_rsp.rc.code;
4369 if (rc) {
4370 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4371 return;
4372 }
4373 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4374 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4375 crq->query_map_rsp.free_pages);
4376}
4377
4378static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4379 struct ibmvnic_adapter *adapter)
4380{
4381 struct net_device *netdev = adapter->netdev;
4382 struct device *dev = &adapter->vdev->dev;
4383 long rc;
4384
4385 atomic_dec(&adapter->running_cap_crqs);
4386 netdev_dbg(netdev, "Outstanding queries: %d\n",
4387 atomic_read(&adapter->running_cap_crqs));
4388 rc = crq->query_capability.rc.code;
4389 if (rc) {
4390 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4391 goto out;
4392 }
4393
4394 switch (be16_to_cpu(crq->query_capability.capability)) {
4395 case MIN_TX_QUEUES:
4396 adapter->min_tx_queues =
4397 be64_to_cpu(crq->query_capability.number);
4398 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4399 adapter->min_tx_queues);
4400 break;
4401 case MIN_RX_QUEUES:
4402 adapter->min_rx_queues =
4403 be64_to_cpu(crq->query_capability.number);
4404 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4405 adapter->min_rx_queues);
4406 break;
4407 case MIN_RX_ADD_QUEUES:
4408 adapter->min_rx_add_queues =
4409 be64_to_cpu(crq->query_capability.number);
4410 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4411 adapter->min_rx_add_queues);
4412 break;
4413 case MAX_TX_QUEUES:
4414 adapter->max_tx_queues =
4415 be64_to_cpu(crq->query_capability.number);
4416 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4417 adapter->max_tx_queues);
4418 break;
4419 case MAX_RX_QUEUES:
4420 adapter->max_rx_queues =
4421 be64_to_cpu(crq->query_capability.number);
4422 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4423 adapter->max_rx_queues);
4424 break;
4425 case MAX_RX_ADD_QUEUES:
4426 adapter->max_rx_add_queues =
4427 be64_to_cpu(crq->query_capability.number);
4428 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4429 adapter->max_rx_add_queues);
4430 break;
4431 case MIN_TX_ENTRIES_PER_SUBCRQ:
4432 adapter->min_tx_entries_per_subcrq =
4433 be64_to_cpu(crq->query_capability.number);
4434 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4435 adapter->min_tx_entries_per_subcrq);
4436 break;
4437 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4438 adapter->min_rx_add_entries_per_subcrq =
4439 be64_to_cpu(crq->query_capability.number);
4440 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4441 adapter->min_rx_add_entries_per_subcrq);
4442 break;
4443 case MAX_TX_ENTRIES_PER_SUBCRQ:
4444 adapter->max_tx_entries_per_subcrq =
4445 be64_to_cpu(crq->query_capability.number);
4446 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4447 adapter->max_tx_entries_per_subcrq);
4448 break;
4449 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4450 adapter->max_rx_add_entries_per_subcrq =
4451 be64_to_cpu(crq->query_capability.number);
4452 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4453 adapter->max_rx_add_entries_per_subcrq);
4454 break;
4455 case TCP_IP_OFFLOAD:
4456 adapter->tcp_ip_offload =
4457 be64_to_cpu(crq->query_capability.number);
4458 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4459 adapter->tcp_ip_offload);
4460 break;
4461 case PROMISC_SUPPORTED:
4462 adapter->promisc_supported =
4463 be64_to_cpu(crq->query_capability.number);
4464 netdev_dbg(netdev, "promisc_supported = %lld\n",
4465 adapter->promisc_supported);
4466 break;
4467 case MIN_MTU:
4468 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4469 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4470 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4471 break;
4472 case MAX_MTU:
4473 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4474 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4475 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4476 break;
4477 case MAX_MULTICAST_FILTERS:
4478 adapter->max_multicast_filters =
4479 be64_to_cpu(crq->query_capability.number);
4480 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4481 adapter->max_multicast_filters);
4482 break;
4483 case VLAN_HEADER_INSERTION:
4484 adapter->vlan_header_insertion =
4485 be64_to_cpu(crq->query_capability.number);
4486 if (adapter->vlan_header_insertion)
4487 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4488 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4489 adapter->vlan_header_insertion);
4490 break;
4491 case RX_VLAN_HEADER_INSERTION:
4492 adapter->rx_vlan_header_insertion =
4493 be64_to_cpu(crq->query_capability.number);
4494 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4495 adapter->rx_vlan_header_insertion);
4496 break;
4497 case MAX_TX_SG_ENTRIES:
4498 adapter->max_tx_sg_entries =
4499 be64_to_cpu(crq->query_capability.number);
4500 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4501 adapter->max_tx_sg_entries);
4502 break;
4503 case RX_SG_SUPPORTED:
4504 adapter->rx_sg_supported =
4505 be64_to_cpu(crq->query_capability.number);
4506 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4507 adapter->rx_sg_supported);
4508 break;
4509 case OPT_TX_COMP_SUB_QUEUES:
4510 adapter->opt_tx_comp_sub_queues =
4511 be64_to_cpu(crq->query_capability.number);
4512 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4513 adapter->opt_tx_comp_sub_queues);
4514 break;
4515 case OPT_RX_COMP_QUEUES:
4516 adapter->opt_rx_comp_queues =
4517 be64_to_cpu(crq->query_capability.number);
4518 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4519 adapter->opt_rx_comp_queues);
4520 break;
4521 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4522 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4523 be64_to_cpu(crq->query_capability.number);
4524 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4525 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4526 break;
4527 case OPT_TX_ENTRIES_PER_SUBCRQ:
4528 adapter->opt_tx_entries_per_subcrq =
4529 be64_to_cpu(crq->query_capability.number);
4530 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4531 adapter->opt_tx_entries_per_subcrq);
4532 break;
4533 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4534 adapter->opt_rxba_entries_per_subcrq =
4535 be64_to_cpu(crq->query_capability.number);
4536 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4537 adapter->opt_rxba_entries_per_subcrq);
4538 break;
4539 case TX_RX_DESC_REQ:
4540 adapter->tx_rx_desc_req = crq->query_capability.number;
4541 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4542 adapter->tx_rx_desc_req);
4543 break;
4544
4545 default:
4546 netdev_err(netdev, "Got invalid cap rsp %d\n",
4547 crq->query_capability.capability);
4548 }
4549
4550out:
4551 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4552 adapter->wait_capability = false;
4553 ibmvnic_send_req_caps(adapter, 0);
4554 }
4555}
4556
4557static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4558{
4559 union ibmvnic_crq crq;
4560 int rc;
4561
4562 memset(&crq, 0, sizeof(crq));
4563 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4564 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4565
4566 mutex_lock(&adapter->fw_lock);
4567 adapter->fw_done_rc = 0;
4568 reinit_completion(&adapter->fw_done);
4569
4570 rc = ibmvnic_send_crq(adapter, &crq);
4571 if (rc) {
4572 mutex_unlock(&adapter->fw_lock);
4573 return rc;
4574 }
4575
4576 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4577 if (rc) {
4578 mutex_unlock(&adapter->fw_lock);
4579 return rc;
4580 }
4581
4582 mutex_unlock(&adapter->fw_lock);
4583 return adapter->fw_done_rc ? -EIO : 0;
4584}
4585
4586static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4587 struct ibmvnic_adapter *adapter)
4588{
4589 struct net_device *netdev = adapter->netdev;
4590 int rc;
4591 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4592
4593 rc = crq->query_phys_parms_rsp.rc.code;
4594 if (rc) {
4595 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4596 return rc;
4597 }
4598 switch (rspeed) {
4599 case IBMVNIC_10MBPS:
4600 adapter->speed = SPEED_10;
4601 break;
4602 case IBMVNIC_100MBPS:
4603 adapter->speed = SPEED_100;
4604 break;
4605 case IBMVNIC_1GBPS:
4606 adapter->speed = SPEED_1000;
4607 break;
4608 case IBMVNIC_10GBP:
4609 adapter->speed = SPEED_10000;
4610 break;
4611 case IBMVNIC_25GBPS:
4612 adapter->speed = SPEED_25000;
4613 break;
4614 case IBMVNIC_40GBPS:
4615 adapter->speed = SPEED_40000;
4616 break;
4617 case IBMVNIC_50GBPS:
4618 adapter->speed = SPEED_50000;
4619 break;
4620 case IBMVNIC_100GBPS:
4621 adapter->speed = SPEED_100000;
4622 break;
4623 default:
4624 if (netif_carrier_ok(netdev))
4625 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4626 adapter->speed = SPEED_UNKNOWN;
4627 }
4628 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4629 adapter->duplex = DUPLEX_FULL;
4630 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4631 adapter->duplex = DUPLEX_HALF;
4632 else
4633 adapter->duplex = DUPLEX_UNKNOWN;
4634
4635 return rc;
4636}
4637
4638static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4639 struct ibmvnic_adapter *adapter)
4640{
4641 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4642 struct net_device *netdev = adapter->netdev;
4643 struct device *dev = &adapter->vdev->dev;
4644 u64 *u64_crq = (u64 *)crq;
4645 long rc;
4646
4647 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4648 (unsigned long int)cpu_to_be64(u64_crq[0]),
4649 (unsigned long int)cpu_to_be64(u64_crq[1]));
4650 switch (gen_crq->first) {
4651 case IBMVNIC_CRQ_INIT_RSP:
4652 switch (gen_crq->cmd) {
4653 case IBMVNIC_CRQ_INIT:
4654 dev_info(dev, "Partner initialized\n");
4655 adapter->from_passive_init = true;
4656 adapter->failover_pending = false;
4657 if (!completion_done(&adapter->init_done)) {
4658 complete(&adapter->init_done);
4659 adapter->init_done_rc = -EIO;
4660 }
4661 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4662 break;
4663 case IBMVNIC_CRQ_INIT_COMPLETE:
4664 dev_info(dev, "Partner initialization complete\n");
4665 adapter->crq.active = true;
4666 send_version_xchg(adapter);
4667 break;
4668 default:
4669 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4670 }
4671 return;
4672 case IBMVNIC_CRQ_XPORT_EVENT:
4673 netif_carrier_off(netdev);
4674 adapter->crq.active = false;
4675 /* terminate any thread waiting for a response
4676 * from the device
4677 */
4678 if (!completion_done(&adapter->fw_done)) {
4679 adapter->fw_done_rc = -EIO;
4680 complete(&adapter->fw_done);
4681 }
4682 if (!completion_done(&adapter->stats_done))
4683 complete(&adapter->stats_done);
4684 if (test_bit(0, &adapter->resetting))
4685 adapter->force_reset_recovery = true;
4686 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4687 dev_info(dev, "Migrated, re-enabling adapter\n");
4688 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4689 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4690 dev_info(dev, "Backing device failover detected\n");
4691 adapter->failover_pending = true;
4692 } else {
4693 /* The adapter lost the connection */
4694 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4695 gen_crq->cmd);
4696 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4697 }
4698 return;
4699 case IBMVNIC_CRQ_CMD_RSP:
4700 break;
4701 default:
4702 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4703 gen_crq->first);
4704 return;
4705 }
4706
4707 switch (gen_crq->cmd) {
4708 case VERSION_EXCHANGE_RSP:
4709 rc = crq->version_exchange_rsp.rc.code;
4710 if (rc) {
4711 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4712 break;
4713 }
4714 ibmvnic_version =
4715 be16_to_cpu(crq->version_exchange_rsp.version);
4716 dev_info(dev, "Partner protocol version is %d\n",
4717 ibmvnic_version);
4718 send_cap_queries(adapter);
4719 break;
4720 case QUERY_CAPABILITY_RSP:
4721 handle_query_cap_rsp(crq, adapter);
4722 break;
4723 case QUERY_MAP_RSP:
4724 handle_query_map_rsp(crq, adapter);
4725 break;
4726 case REQUEST_MAP_RSP:
4727 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4728 complete(&adapter->fw_done);
4729 break;
4730 case REQUEST_UNMAP_RSP:
4731 handle_request_unmap_rsp(crq, adapter);
4732 break;
4733 case REQUEST_CAPABILITY_RSP:
4734 handle_request_cap_rsp(crq, adapter);
4735 break;
4736 case LOGIN_RSP:
4737 netdev_dbg(netdev, "Got Login Response\n");
4738 handle_login_rsp(crq, adapter);
4739 break;
4740 case LOGICAL_LINK_STATE_RSP:
4741 netdev_dbg(netdev,
4742 "Got Logical Link State Response, state: %d rc: %d\n",
4743 crq->logical_link_state_rsp.link_state,
4744 crq->logical_link_state_rsp.rc.code);
4745 adapter->logical_link_state =
4746 crq->logical_link_state_rsp.link_state;
4747 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4748 complete(&adapter->init_done);
4749 break;
4750 case LINK_STATE_INDICATION:
4751 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4752 adapter->phys_link_state =
4753 crq->link_state_indication.phys_link_state;
4754 adapter->logical_link_state =
4755 crq->link_state_indication.logical_link_state;
4756 if (adapter->phys_link_state && adapter->logical_link_state)
4757 netif_carrier_on(netdev);
4758 else
4759 netif_carrier_off(netdev);
4760 break;
4761 case CHANGE_MAC_ADDR_RSP:
4762 netdev_dbg(netdev, "Got MAC address change Response\n");
4763 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4764 break;
4765 case ERROR_INDICATION:
4766 netdev_dbg(netdev, "Got Error Indication\n");
4767 handle_error_indication(crq, adapter);
4768 break;
4769 case REQUEST_STATISTICS_RSP:
4770 netdev_dbg(netdev, "Got Statistics Response\n");
4771 complete(&adapter->stats_done);
4772 break;
4773 case QUERY_IP_OFFLOAD_RSP:
4774 netdev_dbg(netdev, "Got Query IP offload Response\n");
4775 handle_query_ip_offload_rsp(adapter);
4776 break;
4777 case MULTICAST_CTRL_RSP:
4778 netdev_dbg(netdev, "Got multicast control Response\n");
4779 break;
4780 case CONTROL_IP_OFFLOAD_RSP:
4781 netdev_dbg(netdev, "Got Control IP offload Response\n");
4782 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4783 sizeof(adapter->ip_offload_ctrl),
4784 DMA_TO_DEVICE);
4785 complete(&adapter->init_done);
4786 break;
4787 case COLLECT_FW_TRACE_RSP:
4788 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4789 complete(&adapter->fw_done);
4790 break;
4791 case GET_VPD_SIZE_RSP:
4792 handle_vpd_size_rsp(crq, adapter);
4793 break;
4794 case GET_VPD_RSP:
4795 handle_vpd_rsp(crq, adapter);
4796 break;
4797 case QUERY_PHYS_PARMS_RSP:
4798 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4799 complete(&adapter->fw_done);
4800 break;
4801 default:
4802 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4803 gen_crq->cmd);
4804 }
4805}
4806
4807static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4808{
4809 struct ibmvnic_adapter *adapter = instance;
4810
4811 tasklet_schedule(&adapter->tasklet);
4812 return IRQ_HANDLED;
4813}
4814
4815static void ibmvnic_tasklet(void *data)
4816{
4817 struct ibmvnic_adapter *adapter = data;
4818 struct ibmvnic_crq_queue *queue = &adapter->crq;
4819 union ibmvnic_crq *crq;
4820 unsigned long flags;
4821 bool done = false;
4822
4823 spin_lock_irqsave(&queue->lock, flags);
4824 while (!done) {
4825 /* Pull all the valid messages off the CRQ */
4826 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4827 ibmvnic_handle_crq(crq, adapter);
4828 crq->generic.first = 0;
4829 }
4830
4831 /* remain in tasklet until all
4832 * capabilities responses are received
4833 */
4834 if (!adapter->wait_capability)
4835 done = true;
4836 }
4837 /* if capabilities CRQ's were sent in this tasklet, the following
4838 * tasklet must wait until all responses are received
4839 */
4840 if (atomic_read(&adapter->running_cap_crqs) != 0)
4841 adapter->wait_capability = true;
4842 spin_unlock_irqrestore(&queue->lock, flags);
4843}
4844
4845static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4846{
4847 struct vio_dev *vdev = adapter->vdev;
4848 int rc;
4849
4850 do {
4851 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4852 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4853
4854 if (rc)
4855 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4856
4857 return rc;
4858}
4859
4860static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4861{
4862 struct ibmvnic_crq_queue *crq = &adapter->crq;
4863 struct device *dev = &adapter->vdev->dev;
4864 struct vio_dev *vdev = adapter->vdev;
4865 int rc;
4866
4867 /* Close the CRQ */
4868 do {
4869 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4870 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4871
4872 /* Clean out the queue */
4873 memset(crq->msgs, 0, PAGE_SIZE);
4874 crq->cur = 0;
4875 crq->active = false;
4876
4877 /* And re-open it again */
4878 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4879 crq->msg_token, PAGE_SIZE);
4880
4881 if (rc == H_CLOSED)
4882 /* Adapter is good, but other end is not ready */
4883 dev_warn(dev, "Partner adapter not ready\n");
4884 else if (rc != 0)
4885 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4886
4887 return rc;
4888}
4889
4890static void release_crq_queue(struct ibmvnic_adapter *adapter)
4891{
4892 struct ibmvnic_crq_queue *crq = &adapter->crq;
4893 struct vio_dev *vdev = adapter->vdev;
4894 long rc;
4895
4896 if (!crq->msgs)
4897 return;
4898
4899 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4900 free_irq(vdev->irq, adapter);
4901 tasklet_kill(&adapter->tasklet);
4902 do {
4903 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4904 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4905
4906 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4907 DMA_BIDIRECTIONAL);
4908 free_page((unsigned long)crq->msgs);
4909 crq->msgs = NULL;
4910 crq->active = false;
4911}
4912
4913static int init_crq_queue(struct ibmvnic_adapter *adapter)
4914{
4915 struct ibmvnic_crq_queue *crq = &adapter->crq;
4916 struct device *dev = &adapter->vdev->dev;
4917 struct vio_dev *vdev = adapter->vdev;
4918 int rc, retrc = -ENOMEM;
4919
4920 if (crq->msgs)
4921 return 0;
4922
4923 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4924 /* Should we allocate more than one page? */
4925
4926 if (!crq->msgs)
4927 return -ENOMEM;
4928
4929 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4930 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4931 DMA_BIDIRECTIONAL);
4932 if (dma_mapping_error(dev, crq->msg_token))
4933 goto map_failed;
4934
4935 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4936 crq->msg_token, PAGE_SIZE);
4937
4938 if (rc == H_RESOURCE)
4939 /* maybe kexecing and resource is busy. try a reset */
4940 rc = ibmvnic_reset_crq(adapter);
4941 retrc = rc;
4942
4943 if (rc == H_CLOSED) {
4944 dev_warn(dev, "Partner adapter not ready\n");
4945 } else if (rc) {
4946 dev_warn(dev, "Error %d opening adapter\n", rc);
4947 goto reg_crq_failed;
4948 }
4949
4950 retrc = 0;
4951
4952 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4953 (unsigned long)adapter);
4954
4955 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4956 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4957 adapter->vdev->unit_address);
4958 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4959 if (rc) {
4960 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4961 vdev->irq, rc);
4962 goto req_irq_failed;
4963 }
4964
4965 rc = vio_enable_interrupts(vdev);
4966 if (rc) {
4967 dev_err(dev, "Error %d enabling interrupts\n", rc);
4968 goto req_irq_failed;
4969 }
4970
4971 crq->cur = 0;
4972 spin_lock_init(&crq->lock);
4973
4974 return retrc;
4975
4976req_irq_failed:
4977 tasklet_kill(&adapter->tasklet);
4978 do {
4979 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4980 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4981reg_crq_failed:
4982 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4983map_failed:
4984 free_page((unsigned long)crq->msgs);
4985 crq->msgs = NULL;
4986 return retrc;
4987}
4988
4989static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4990{
4991 struct device *dev = &adapter->vdev->dev;
4992 unsigned long timeout = msecs_to_jiffies(30000);
4993 u64 old_num_rx_queues, old_num_tx_queues;
4994 int rc;
4995
4996 adapter->from_passive_init = false;
4997
4998 old_num_rx_queues = adapter->req_rx_queues;
4999 old_num_tx_queues = adapter->req_tx_queues;
5000
5001 reinit_completion(&adapter->init_done);
5002 adapter->init_done_rc = 0;
5003 ibmvnic_send_crq_init(adapter);
5004 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5005 dev_err(dev, "Initialization sequence timed out\n");
5006 return -1;
5007 }
5008
5009 if (adapter->init_done_rc) {
5010 release_crq_queue(adapter);
5011 return adapter->init_done_rc;
5012 }
5013
5014 if (adapter->from_passive_init) {
5015 adapter->state = VNIC_OPEN;
5016 adapter->from_passive_init = false;
5017 return -1;
5018 }
5019
5020 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5021 adapter->reset_reason != VNIC_RESET_MOBILITY) {
5022 if (adapter->req_rx_queues != old_num_rx_queues ||
5023 adapter->req_tx_queues != old_num_tx_queues) {
5024 release_sub_crqs(adapter, 0);
5025 rc = init_sub_crqs(adapter);
5026 } else {
5027 rc = reset_sub_crq_queues(adapter);
5028 }
5029 } else {
5030 rc = init_sub_crqs(adapter);
5031 }
5032
5033 if (rc) {
5034 dev_err(dev, "Initialization of sub crqs failed\n");
5035 release_crq_queue(adapter);
5036 return rc;
5037 }
5038
5039 rc = init_sub_crq_irqs(adapter);
5040 if (rc) {
5041 dev_err(dev, "Failed to initialize sub crq irqs\n");
5042 release_crq_queue(adapter);
5043 }
5044
5045 return rc;
5046}
5047
5048static int ibmvnic_init(struct ibmvnic_adapter *adapter)
5049{
5050 struct device *dev = &adapter->vdev->dev;
5051 unsigned long timeout = msecs_to_jiffies(30000);
5052 int rc;
5053
5054 adapter->from_passive_init = false;
5055
5056 adapter->init_done_rc = 0;
5057 ibmvnic_send_crq_init(adapter);
5058 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5059 dev_err(dev, "Initialization sequence timed out\n");
5060 return -1;
5061 }
5062
5063 if (adapter->init_done_rc) {
5064 release_crq_queue(adapter);
5065 return adapter->init_done_rc;
5066 }
5067
5068 if (adapter->from_passive_init) {
5069 adapter->state = VNIC_OPEN;
5070 adapter->from_passive_init = false;
5071 return -1;
5072 }
5073
5074 rc = init_sub_crqs(adapter);
5075 if (rc) {
5076 dev_err(dev, "Initialization of sub crqs failed\n");
5077 release_crq_queue(adapter);
5078 return rc;
5079 }
5080
5081 rc = init_sub_crq_irqs(adapter);
5082 if (rc) {
5083 dev_err(dev, "Failed to initialize sub crq irqs\n");
5084 release_crq_queue(adapter);
5085 }
5086
5087 return rc;
5088}
5089
5090static struct device_attribute dev_attr_failover;
5091
5092static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5093{
5094 struct ibmvnic_adapter *adapter;
5095 struct net_device *netdev;
5096 unsigned char *mac_addr_p;
5097 int rc;
5098
5099 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5100 dev->unit_address);
5101
5102 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5103 VETH_MAC_ADDR, NULL);
5104 if (!mac_addr_p) {
5105 dev_err(&dev->dev,
5106 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5107 __FILE__, __LINE__);
5108 return 0;
5109 }
5110
5111 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5112 IBMVNIC_MAX_QUEUES);
5113 if (!netdev)
5114 return -ENOMEM;
5115
5116 adapter = netdev_priv(netdev);
5117 adapter->state = VNIC_PROBING;
5118 dev_set_drvdata(&dev->dev, netdev);
5119 adapter->vdev = dev;
5120 adapter->netdev = netdev;
5121
5122 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5123 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5124 netdev->irq = dev->irq;
5125 netdev->netdev_ops = &ibmvnic_netdev_ops;
5126 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5127 SET_NETDEV_DEV(netdev, &dev->dev);
5128
5129 spin_lock_init(&adapter->stats_lock);
5130
5131 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5132 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5133 __ibmvnic_delayed_reset);
5134 INIT_LIST_HEAD(&adapter->rwi_list);
5135 spin_lock_init(&adapter->rwi_lock);
5136 spin_lock_init(&adapter->state_lock);
5137 mutex_init(&adapter->fw_lock);
5138 init_completion(&adapter->init_done);
5139 init_completion(&adapter->fw_done);
5140 init_completion(&adapter->reset_done);
5141 init_completion(&adapter->stats_done);
5142 clear_bit(0, &adapter->resetting);
5143
5144 do {
5145 rc = init_crq_queue(adapter);
5146 if (rc) {
5147 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5148 rc);
5149 goto ibmvnic_init_fail;
5150 }
5151
5152 rc = ibmvnic_init(adapter);
5153 if (rc && rc != EAGAIN)
5154 goto ibmvnic_init_fail;
5155 } while (rc == EAGAIN);
5156
5157 rc = init_stats_buffers(adapter);
5158 if (rc)
5159 goto ibmvnic_init_fail;
5160
5161 rc = init_stats_token(adapter);
5162 if (rc)
5163 goto ibmvnic_stats_fail;
5164
5165 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5166 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5167 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5168
5169 rc = device_create_file(&dev->dev, &dev_attr_failover);
5170 if (rc)
5171 goto ibmvnic_dev_file_err;
5172
5173 netif_carrier_off(netdev);
5174 rc = register_netdev(netdev);
5175 if (rc) {
5176 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5177 goto ibmvnic_register_fail;
5178 }
5179 dev_info(&dev->dev, "ibmvnic registered\n");
5180
5181 adapter->state = VNIC_PROBED;
5182
5183 adapter->wait_for_reset = false;
5184
5185 return 0;
5186
5187ibmvnic_register_fail:
5188 device_remove_file(&dev->dev, &dev_attr_failover);
5189
5190ibmvnic_dev_file_err:
5191 release_stats_token(adapter);
5192
5193ibmvnic_stats_fail:
5194 release_stats_buffers(adapter);
5195
5196ibmvnic_init_fail:
5197 release_sub_crqs(adapter, 1);
5198 release_crq_queue(adapter);
5199 mutex_destroy(&adapter->fw_lock);
5200 free_netdev(netdev);
5201
5202 return rc;
5203}
5204
5205static int ibmvnic_remove(struct vio_dev *dev)
5206{
5207 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5208 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5209 unsigned long flags;
5210
5211 spin_lock_irqsave(&adapter->state_lock, flags);
5212 if (adapter->state == VNIC_RESETTING) {
5213 spin_unlock_irqrestore(&adapter->state_lock, flags);
5214 return -EBUSY;
5215 }
5216
5217 adapter->state = VNIC_REMOVING;
5218 spin_unlock_irqrestore(&adapter->state_lock, flags);
5219
5220 flush_work(&adapter->ibmvnic_reset);
5221 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5222
5223 rtnl_lock();
5224 unregister_netdevice(netdev);
5225
5226 release_resources(adapter);
5227 release_sub_crqs(adapter, 1);
5228 release_crq_queue(adapter);
5229
5230 release_stats_token(adapter);
5231 release_stats_buffers(adapter);
5232
5233 adapter->state = VNIC_REMOVED;
5234
5235 rtnl_unlock();
5236 mutex_destroy(&adapter->fw_lock);
5237 device_remove_file(&dev->dev, &dev_attr_failover);
5238 free_netdev(netdev);
5239 dev_set_drvdata(&dev->dev, NULL);
5240
5241 return 0;
5242}
5243
5244static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5245 const char *buf, size_t count)
5246{
5247 struct net_device *netdev = dev_get_drvdata(dev);
5248 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5249 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5250 __be64 session_token;
5251 long rc;
5252
5253 if (!sysfs_streq(buf, "1"))
5254 return -EINVAL;
5255
5256 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5257 H_GET_SESSION_TOKEN, 0, 0, 0);
5258 if (rc) {
5259 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5260 rc);
5261 return -EINVAL;
5262 }
5263
5264 session_token = (__be64)retbuf[0];
5265 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5266 be64_to_cpu(session_token));
5267 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5268 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5269 if (rc) {
5270 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5271 rc);
5272 return -EINVAL;
5273 }
5274
5275 return count;
5276}
5277
5278static DEVICE_ATTR_WO(failover);
5279
5280static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5281{
5282 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5283 struct ibmvnic_adapter *adapter;
5284 struct iommu_table *tbl;
5285 unsigned long ret = 0;
5286 int i;
5287
5288 tbl = get_iommu_table_base(&vdev->dev);
5289
5290 /* netdev inits at probe time along with the structures we need below*/
5291 if (!netdev)
5292 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5293
5294 adapter = netdev_priv(netdev);
5295
5296 ret += PAGE_SIZE; /* the crq message queue */
5297 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5298
5299 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5300 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5301
5302 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5303 i++)
5304 ret += adapter->rx_pool[i].size *
5305 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5306
5307 return ret;
5308}
5309
5310static int ibmvnic_resume(struct device *dev)
5311{
5312 struct net_device *netdev = dev_get_drvdata(dev);
5313 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5314
5315 if (adapter->state != VNIC_OPEN)
5316 return 0;
5317
5318 tasklet_schedule(&adapter->tasklet);
5319
5320 return 0;
5321}
5322
5323static const struct vio_device_id ibmvnic_device_table[] = {
5324 {"network", "IBM,vnic"},
5325 {"", "" }
5326};
5327MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5328
5329static const struct dev_pm_ops ibmvnic_pm_ops = {
5330 .resume = ibmvnic_resume
5331};
5332
5333static struct vio_driver ibmvnic_driver = {
5334 .id_table = ibmvnic_device_table,
5335 .probe = ibmvnic_probe,
5336 .remove = ibmvnic_remove,
5337 .get_desired_dma = ibmvnic_get_desired_dma,
5338 .name = ibmvnic_driver_name,
5339 .pm = &ibmvnic_pm_ops,
5340};
5341
5342/* module functions */
5343static int __init ibmvnic_module_init(void)
5344{
5345 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5346 IBMVNIC_DRIVER_VERSION);
5347
5348 return vio_register_driver(&ibmvnic_driver);
5349}
5350
5351static void __exit ibmvnic_module_exit(void)
5352{
5353 vio_unregister_driver(&ibmvnic_driver);
5354}
5355
5356module_init(ibmvnic_module_init);
5357module_exit(ibmvnic_module_exit);