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