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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/if_arp.h>
63#include <linux/in.h>
64#include <linux/ip.h>
65#include <linux/ipv6.h>
66#include <linux/irq.h>
67#include <linux/kthread.h>
68#include <linux/seq_file.h>
69#include <linux/interrupt.h>
70#include <net/net_namespace.h>
71#include <asm/hvcall.h>
72#include <linux/atomic.h>
73#include <asm/vio.h>
74#include <asm/iommu.h>
75#include <linux/uaccess.h>
76#include <asm/firmware.h>
77#include <linux/workqueue.h>
78#include <linux/if_vlan.h>
79#include <linux/utsname.h>
80
81#include "ibmvnic.h"
82
83static const char ibmvnic_driver_name[] = "ibmvnic";
84static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
86MODULE_AUTHOR("Santiago Leon");
87MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88MODULE_LICENSE("GPL");
89MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92static int ibmvnic_remove(struct vio_dev *);
93static void release_sub_crqs(struct ibmvnic_adapter *, bool);
94static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110static int ibmvnic_poll(struct napi_struct *napi, int data);
111static void send_map_query(struct ibmvnic_adapter *adapter);
112static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113static void send_request_unmap(struct ibmvnic_adapter *, u8);
114static int send_login(struct ibmvnic_adapter *adapter);
115static void send_cap_queries(struct ibmvnic_adapter *adapter);
116static int init_sub_crqs(struct ibmvnic_adapter *);
117static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118static int ibmvnic_init(struct ibmvnic_adapter *);
119static void release_crq_queue(struct ibmvnic_adapter *);
120static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
121static int init_crq_queue(struct ibmvnic_adapter *adapter);
122
123struct ibmvnic_stat {
124 char name[ETH_GSTRING_LEN];
125 int offset;
126};
127
128#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
129 offsetof(struct ibmvnic_statistics, stat))
130#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
131
132static const struct ibmvnic_stat ibmvnic_stats[] = {
133 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
134 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
135 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
136 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
137 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
138 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
139 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
140 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
141 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
142 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
143 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
144 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
145 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
146 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
147 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
148 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
149 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
150 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
151 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
152 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
153 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
154 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
155};
156
157static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
158 unsigned long length, unsigned long *number,
159 unsigned long *irq)
160{
161 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
162 long rc;
163
164 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
165 *number = retbuf[0];
166 *irq = retbuf[1];
167
168 return rc;
169}
170
171static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
172 struct ibmvnic_long_term_buff *ltb, int size)
173{
174 struct device *dev = &adapter->vdev->dev;
175
176 ltb->size = size;
177 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
178 GFP_KERNEL);
179
180 if (!ltb->buff) {
181 dev_err(dev, "Couldn't alloc long term buffer\n");
182 return -ENOMEM;
183 }
184 ltb->map_id = adapter->map_id;
185 adapter->map_id++;
186
187 init_completion(&adapter->fw_done);
188 send_request_map(adapter, ltb->addr,
189 ltb->size, ltb->map_id);
190 wait_for_completion(&adapter->fw_done);
191
192 if (adapter->fw_done_rc) {
193 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
194 adapter->fw_done_rc);
195 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
196 return -1;
197 }
198 return 0;
199}
200
201static void free_long_term_buff(struct ibmvnic_adapter *adapter,
202 struct ibmvnic_long_term_buff *ltb)
203{
204 struct device *dev = &adapter->vdev->dev;
205
206 if (!ltb->buff)
207 return;
208
209 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
210 adapter->reset_reason != VNIC_RESET_MOBILITY)
211 send_request_unmap(adapter, ltb->map_id);
212 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
213}
214
215static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
216 struct ibmvnic_long_term_buff *ltb)
217{
218 memset(ltb->buff, 0, ltb->size);
219
220 init_completion(&adapter->fw_done);
221 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
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 dev_info(dev, "replenish pools failure\n");
323 pool->free_map[pool->next_free] = index;
324 pool->rx_buff[index].skb = NULL;
325
326 dev_kfree_skb_any(skb);
327 adapter->replenish_add_buff_failure++;
328 atomic_add(buffers_added, &pool->available);
329
330 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
331 /* Disable buffer pool replenishment and report carrier off if
332 * queue is closed or pending failover.
333 * Firmware guarantees that a signal will be sent to the
334 * driver, triggering a reset.
335 */
336 deactivate_rx_pools(adapter);
337 netif_carrier_off(adapter->netdev);
338 }
339}
340
341static void replenish_pools(struct ibmvnic_adapter *adapter)
342{
343 int i;
344
345 adapter->replenish_task_cycles++;
346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
347 i++) {
348 if (adapter->rx_pool[i].active)
349 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 }
351}
352
353static void release_stats_buffers(struct ibmvnic_adapter *adapter)
354{
355 kfree(adapter->tx_stats_buffers);
356 kfree(adapter->rx_stats_buffers);
357 adapter->tx_stats_buffers = NULL;
358 adapter->rx_stats_buffers = NULL;
359}
360
361static int init_stats_buffers(struct ibmvnic_adapter *adapter)
362{
363 adapter->tx_stats_buffers =
364 kcalloc(IBMVNIC_MAX_QUEUES,
365 sizeof(struct ibmvnic_tx_queue_stats),
366 GFP_KERNEL);
367 if (!adapter->tx_stats_buffers)
368 return -ENOMEM;
369
370 adapter->rx_stats_buffers =
371 kcalloc(IBMVNIC_MAX_QUEUES,
372 sizeof(struct ibmvnic_rx_queue_stats),
373 GFP_KERNEL);
374 if (!adapter->rx_stats_buffers)
375 return -ENOMEM;
376
377 return 0;
378}
379
380static void release_stats_token(struct ibmvnic_adapter *adapter)
381{
382 struct device *dev = &adapter->vdev->dev;
383
384 if (!adapter->stats_token)
385 return;
386
387 dma_unmap_single(dev, adapter->stats_token,
388 sizeof(struct ibmvnic_statistics),
389 DMA_FROM_DEVICE);
390 adapter->stats_token = 0;
391}
392
393static int init_stats_token(struct ibmvnic_adapter *adapter)
394{
395 struct device *dev = &adapter->vdev->dev;
396 dma_addr_t stok;
397
398 stok = dma_map_single(dev, &adapter->stats,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 if (dma_mapping_error(dev, stok)) {
402 dev_err(dev, "Couldn't map stats buffer\n");
403 return -1;
404 }
405
406 adapter->stats_token = stok;
407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
408 return 0;
409}
410
411static int reset_rx_pools(struct ibmvnic_adapter *adapter)
412{
413 struct ibmvnic_rx_pool *rx_pool;
414 int rx_scrqs;
415 int i, j, rc;
416 u64 *size_array;
417
418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
420
421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
422 for (i = 0; i < rx_scrqs; i++) {
423 rx_pool = &adapter->rx_pool[i];
424
425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
426
427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
428 free_long_term_buff(adapter, &rx_pool->long_term_buff);
429 rx_pool->buff_size = be64_to_cpu(size_array[i]);
430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
431 rx_pool->size *
432 rx_pool->buff_size);
433 } else {
434 rc = reset_long_term_buff(adapter,
435 &rx_pool->long_term_buff);
436 }
437
438 if (rc)
439 return rc;
440
441 for (j = 0; j < rx_pool->size; j++)
442 rx_pool->free_map[j] = j;
443
444 memset(rx_pool->rx_buff, 0,
445 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
446
447 atomic_set(&rx_pool->available, 0);
448 rx_pool->next_alloc = 0;
449 rx_pool->next_free = 0;
450 rx_pool->active = 1;
451 }
452
453 return 0;
454}
455
456static void release_rx_pools(struct ibmvnic_adapter *adapter)
457{
458 struct ibmvnic_rx_pool *rx_pool;
459 int i, j;
460
461 if (!adapter->rx_pool)
462 return;
463
464 for (i = 0; i < adapter->num_active_rx_pools; i++) {
465 rx_pool = &adapter->rx_pool[i];
466
467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
468
469 kfree(rx_pool->free_map);
470 free_long_term_buff(adapter, &rx_pool->long_term_buff);
471
472 if (!rx_pool->rx_buff)
473 continue;
474
475 for (j = 0; j < rx_pool->size; j++) {
476 if (rx_pool->rx_buff[j].skb) {
477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
478 rx_pool->rx_buff[i].skb = NULL;
479 }
480 }
481
482 kfree(rx_pool->rx_buff);
483 }
484
485 kfree(adapter->rx_pool);
486 adapter->rx_pool = NULL;
487 adapter->num_active_rx_pools = 0;
488}
489
490static int init_rx_pools(struct net_device *netdev)
491{
492 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
493 struct device *dev = &adapter->vdev->dev;
494 struct ibmvnic_rx_pool *rx_pool;
495 int rxadd_subcrqs;
496 u64 *size_array;
497 int i, j;
498
499 rxadd_subcrqs =
500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
503
504 adapter->rx_pool = kcalloc(rxadd_subcrqs,
505 sizeof(struct ibmvnic_rx_pool),
506 GFP_KERNEL);
507 if (!adapter->rx_pool) {
508 dev_err(dev, "Failed to allocate rx pools\n");
509 return -1;
510 }
511
512 adapter->num_active_rx_pools = rxadd_subcrqs;
513
514 for (i = 0; i < rxadd_subcrqs; i++) {
515 rx_pool = &adapter->rx_pool[i];
516
517 netdev_dbg(adapter->netdev,
518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
519 i, adapter->req_rx_add_entries_per_subcrq,
520 be64_to_cpu(size_array[i]));
521
522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
523 rx_pool->index = i;
524 rx_pool->buff_size = be64_to_cpu(size_array[i]);
525 rx_pool->active = 1;
526
527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
528 GFP_KERNEL);
529 if (!rx_pool->free_map) {
530 release_rx_pools(adapter);
531 return -1;
532 }
533
534 rx_pool->rx_buff = kcalloc(rx_pool->size,
535 sizeof(struct ibmvnic_rx_buff),
536 GFP_KERNEL);
537 if (!rx_pool->rx_buff) {
538 dev_err(dev, "Couldn't alloc rx buffers\n");
539 release_rx_pools(adapter);
540 return -1;
541 }
542
543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
544 rx_pool->size * rx_pool->buff_size)) {
545 release_rx_pools(adapter);
546 return -1;
547 }
548
549 for (j = 0; j < rx_pool->size; ++j)
550 rx_pool->free_map[j] = j;
551
552 atomic_set(&rx_pool->available, 0);
553 rx_pool->next_alloc = 0;
554 rx_pool->next_free = 0;
555 }
556
557 return 0;
558}
559
560static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
561 struct ibmvnic_tx_pool *tx_pool)
562{
563 int rc, i;
564
565 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
566 if (rc)
567 return rc;
568
569 memset(tx_pool->tx_buff, 0,
570 tx_pool->num_buffers *
571 sizeof(struct ibmvnic_tx_buff));
572
573 for (i = 0; i < tx_pool->num_buffers; i++)
574 tx_pool->free_map[i] = i;
575
576 tx_pool->consumer_index = 0;
577 tx_pool->producer_index = 0;
578
579 return 0;
580}
581
582static int reset_tx_pools(struct ibmvnic_adapter *adapter)
583{
584 int tx_scrqs;
585 int i, rc;
586
587 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
588 for (i = 0; i < tx_scrqs; i++) {
589 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
590 if (rc)
591 return rc;
592 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
593 if (rc)
594 return rc;
595 }
596
597 return 0;
598}
599
600static void release_vpd_data(struct ibmvnic_adapter *adapter)
601{
602 if (!adapter->vpd)
603 return;
604
605 kfree(adapter->vpd->buff);
606 kfree(adapter->vpd);
607
608 adapter->vpd = NULL;
609}
610
611static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
612 struct ibmvnic_tx_pool *tx_pool)
613{
614 kfree(tx_pool->tx_buff);
615 kfree(tx_pool->free_map);
616 free_long_term_buff(adapter, &tx_pool->long_term_buff);
617}
618
619static void release_tx_pools(struct ibmvnic_adapter *adapter)
620{
621 int i;
622
623 if (!adapter->tx_pool)
624 return;
625
626 for (i = 0; i < adapter->num_active_tx_pools; i++) {
627 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
628 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
629 }
630
631 kfree(adapter->tx_pool);
632 adapter->tx_pool = NULL;
633 kfree(adapter->tso_pool);
634 adapter->tso_pool = NULL;
635 adapter->num_active_tx_pools = 0;
636}
637
638static int init_one_tx_pool(struct net_device *netdev,
639 struct ibmvnic_tx_pool *tx_pool,
640 int num_entries, int buf_size)
641{
642 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
643 int i;
644
645 tx_pool->tx_buff = kcalloc(num_entries,
646 sizeof(struct ibmvnic_tx_buff),
647 GFP_KERNEL);
648 if (!tx_pool->tx_buff)
649 return -1;
650
651 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
652 num_entries * buf_size))
653 return -1;
654
655 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
656 if (!tx_pool->free_map)
657 return -1;
658
659 for (i = 0; i < num_entries; i++)
660 tx_pool->free_map[i] = i;
661
662 tx_pool->consumer_index = 0;
663 tx_pool->producer_index = 0;
664 tx_pool->num_buffers = num_entries;
665 tx_pool->buf_size = buf_size;
666
667 return 0;
668}
669
670static int init_tx_pools(struct net_device *netdev)
671{
672 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
673 int tx_subcrqs;
674 int i, rc;
675
676 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
677 adapter->tx_pool = kcalloc(tx_subcrqs,
678 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
679 if (!adapter->tx_pool)
680 return -1;
681
682 adapter->tso_pool = kcalloc(tx_subcrqs,
683 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
684 if (!adapter->tso_pool)
685 return -1;
686
687 adapter->num_active_tx_pools = tx_subcrqs;
688
689 for (i = 0; i < tx_subcrqs; i++) {
690 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
691 adapter->req_tx_entries_per_subcrq,
692 adapter->req_mtu + VLAN_HLEN);
693 if (rc) {
694 release_tx_pools(adapter);
695 return rc;
696 }
697
698 init_one_tx_pool(netdev, &adapter->tso_pool[i],
699 IBMVNIC_TSO_BUFS,
700 IBMVNIC_TSO_BUF_SZ);
701 if (rc) {
702 release_tx_pools(adapter);
703 return rc;
704 }
705 }
706
707 return 0;
708}
709
710static void release_error_buffers(struct ibmvnic_adapter *adapter)
711{
712 struct device *dev = &adapter->vdev->dev;
713 struct ibmvnic_error_buff *error_buff, *tmp;
714 unsigned long flags;
715
716 spin_lock_irqsave(&adapter->error_list_lock, flags);
717 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
718 list_del(&error_buff->list);
719 dma_unmap_single(dev, error_buff->dma, error_buff->len,
720 DMA_FROM_DEVICE);
721 kfree(error_buff->buff);
722 kfree(error_buff);
723 }
724 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
725}
726
727static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
728{
729 int i;
730
731 if (adapter->napi_enabled)
732 return;
733
734 for (i = 0; i < adapter->req_rx_queues; i++)
735 napi_enable(&adapter->napi[i]);
736
737 adapter->napi_enabled = true;
738}
739
740static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
741{
742 int i;
743
744 if (!adapter->napi_enabled)
745 return;
746
747 for (i = 0; i < adapter->req_rx_queues; i++) {
748 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
749 napi_disable(&adapter->napi[i]);
750 }
751
752 adapter->napi_enabled = false;
753}
754
755static int init_napi(struct ibmvnic_adapter *adapter)
756{
757 int i;
758
759 adapter->napi = kcalloc(adapter->req_rx_queues,
760 sizeof(struct napi_struct), GFP_KERNEL);
761 if (!adapter->napi)
762 return -ENOMEM;
763
764 for (i = 0; i < adapter->req_rx_queues; i++) {
765 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
766 netif_napi_add(adapter->netdev, &adapter->napi[i],
767 ibmvnic_poll, NAPI_POLL_WEIGHT);
768 }
769
770 adapter->num_active_rx_napi = adapter->req_rx_queues;
771 return 0;
772}
773
774static void release_napi(struct ibmvnic_adapter *adapter)
775{
776 int i;
777
778 if (!adapter->napi)
779 return;
780
781 for (i = 0; i < adapter->num_active_rx_napi; i++) {
782 if (&adapter->napi[i]) {
783 netdev_dbg(adapter->netdev,
784 "Releasing napi[%d]\n", i);
785 netif_napi_del(&adapter->napi[i]);
786 }
787 }
788
789 kfree(adapter->napi);
790 adapter->napi = NULL;
791 adapter->num_active_rx_napi = 0;
792}
793
794static int ibmvnic_login(struct net_device *netdev)
795{
796 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
797 unsigned long timeout = msecs_to_jiffies(30000);
798 int retry_count = 0;
799 bool retry;
800 int rc;
801
802 do {
803 retry = false;
804 if (retry_count > IBMVNIC_MAX_QUEUES) {
805 netdev_warn(netdev, "Login attempts exceeded\n");
806 return -1;
807 }
808
809 adapter->init_done_rc = 0;
810 reinit_completion(&adapter->init_done);
811 rc = send_login(adapter);
812 if (rc) {
813 netdev_warn(netdev, "Unable to login\n");
814 return rc;
815 }
816
817 if (!wait_for_completion_timeout(&adapter->init_done,
818 timeout)) {
819 netdev_warn(netdev, "Login timed out\n");
820 return -1;
821 }
822
823 if (adapter->init_done_rc == PARTIALSUCCESS) {
824 retry_count++;
825 release_sub_crqs(adapter, 1);
826
827 retry = true;
828 netdev_dbg(netdev,
829 "Received partial success, retrying...\n");
830 adapter->init_done_rc = 0;
831 reinit_completion(&adapter->init_done);
832 send_cap_queries(adapter);
833 if (!wait_for_completion_timeout(&adapter->init_done,
834 timeout)) {
835 netdev_warn(netdev,
836 "Capabilities query timed out\n");
837 return -1;
838 }
839
840 rc = init_sub_crqs(adapter);
841 if (rc) {
842 netdev_warn(netdev,
843 "SCRQ initialization failed\n");
844 return -1;
845 }
846
847 rc = init_sub_crq_irqs(adapter);
848 if (rc) {
849 netdev_warn(netdev,
850 "SCRQ irq initialization failed\n");
851 return -1;
852 }
853 } else if (adapter->init_done_rc) {
854 netdev_warn(netdev, "Adapter login failed\n");
855 return -1;
856 }
857 } while (retry);
858
859 /* handle pending MAC address changes after successful login */
860 if (adapter->mac_change_pending) {
861 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
862 adapter->mac_change_pending = false;
863 }
864
865 return 0;
866}
867
868static void release_login_buffer(struct ibmvnic_adapter *adapter)
869{
870 kfree(adapter->login_buf);
871 adapter->login_buf = NULL;
872}
873
874static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
875{
876 kfree(adapter->login_rsp_buf);
877 adapter->login_rsp_buf = NULL;
878}
879
880static void release_resources(struct ibmvnic_adapter *adapter)
881{
882 release_vpd_data(adapter);
883
884 release_tx_pools(adapter);
885 release_rx_pools(adapter);
886
887 release_error_buffers(adapter);
888 release_napi(adapter);
889 release_login_rsp_buffer(adapter);
890}
891
892static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
893{
894 struct net_device *netdev = adapter->netdev;
895 unsigned long timeout = msecs_to_jiffies(30000);
896 union ibmvnic_crq crq;
897 bool resend;
898 int rc;
899
900 netdev_dbg(netdev, "setting link state %d\n", link_state);
901
902 memset(&crq, 0, sizeof(crq));
903 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
904 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
905 crq.logical_link_state.link_state = link_state;
906
907 do {
908 resend = false;
909
910 reinit_completion(&adapter->init_done);
911 rc = ibmvnic_send_crq(adapter, &crq);
912 if (rc) {
913 netdev_err(netdev, "Failed to set link state\n");
914 return rc;
915 }
916
917 if (!wait_for_completion_timeout(&adapter->init_done,
918 timeout)) {
919 netdev_err(netdev, "timeout setting link state\n");
920 return -1;
921 }
922
923 if (adapter->init_done_rc == 1) {
924 /* Partuial success, delay and re-send */
925 mdelay(1000);
926 resend = true;
927 }
928 } while (resend);
929
930 return 0;
931}
932
933static int set_real_num_queues(struct net_device *netdev)
934{
935 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
936 int rc;
937
938 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
939 adapter->req_tx_queues, adapter->req_rx_queues);
940
941 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
942 if (rc) {
943 netdev_err(netdev, "failed to set the number of tx queues\n");
944 return rc;
945 }
946
947 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
948 if (rc)
949 netdev_err(netdev, "failed to set the number of rx queues\n");
950
951 return rc;
952}
953
954static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
955{
956 struct device *dev = &adapter->vdev->dev;
957 union ibmvnic_crq crq;
958 int len = 0;
959
960 if (adapter->vpd->buff)
961 len = adapter->vpd->len;
962
963 init_completion(&adapter->fw_done);
964 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
965 crq.get_vpd_size.cmd = GET_VPD_SIZE;
966 ibmvnic_send_crq(adapter, &crq);
967 wait_for_completion(&adapter->fw_done);
968
969 if (!adapter->vpd->len)
970 return -ENODATA;
971
972 if (!adapter->vpd->buff)
973 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
974 else if (adapter->vpd->len != len)
975 adapter->vpd->buff =
976 krealloc(adapter->vpd->buff,
977 adapter->vpd->len, GFP_KERNEL);
978
979 if (!adapter->vpd->buff) {
980 dev_err(dev, "Could allocate VPD buffer\n");
981 return -ENOMEM;
982 }
983
984 adapter->vpd->dma_addr =
985 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
986 DMA_FROM_DEVICE);
987 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
988 dev_err(dev, "Could not map VPD buffer\n");
989 kfree(adapter->vpd->buff);
990 adapter->vpd->buff = NULL;
991 return -ENOMEM;
992 }
993
994 reinit_completion(&adapter->fw_done);
995 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
996 crq.get_vpd.cmd = GET_VPD;
997 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
998 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
999 ibmvnic_send_crq(adapter, &crq);
1000 wait_for_completion(&adapter->fw_done);
1001
1002 return 0;
1003}
1004
1005static int init_resources(struct ibmvnic_adapter *adapter)
1006{
1007 struct net_device *netdev = adapter->netdev;
1008 int rc;
1009
1010 rc = set_real_num_queues(netdev);
1011 if (rc)
1012 return rc;
1013
1014 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1015 if (!adapter->vpd)
1016 return -ENOMEM;
1017
1018 /* Vital Product Data (VPD) */
1019 rc = ibmvnic_get_vpd(adapter);
1020 if (rc) {
1021 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1022 return rc;
1023 }
1024
1025 adapter->map_id = 1;
1026
1027 rc = init_napi(adapter);
1028 if (rc)
1029 return rc;
1030
1031 send_map_query(adapter);
1032
1033 rc = init_rx_pools(netdev);
1034 if (rc)
1035 return rc;
1036
1037 rc = init_tx_pools(netdev);
1038 return rc;
1039}
1040
1041static int __ibmvnic_open(struct net_device *netdev)
1042{
1043 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1044 enum vnic_state prev_state = adapter->state;
1045 int i, rc;
1046
1047 adapter->state = VNIC_OPENING;
1048 replenish_pools(adapter);
1049 ibmvnic_napi_enable(adapter);
1050
1051 /* We're ready to receive frames, enable the sub-crq interrupts and
1052 * set the logical link state to up
1053 */
1054 for (i = 0; i < adapter->req_rx_queues; i++) {
1055 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1056 if (prev_state == VNIC_CLOSED)
1057 enable_irq(adapter->rx_scrq[i]->irq);
1058 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1059 }
1060
1061 for (i = 0; i < adapter->req_tx_queues; i++) {
1062 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1063 if (prev_state == VNIC_CLOSED)
1064 enable_irq(adapter->tx_scrq[i]->irq);
1065 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1066 }
1067
1068 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1069 if (rc) {
1070 for (i = 0; i < adapter->req_rx_queues; i++)
1071 napi_disable(&adapter->napi[i]);
1072 release_resources(adapter);
1073 return rc;
1074 }
1075
1076 netif_tx_start_all_queues(netdev);
1077
1078 if (prev_state == VNIC_CLOSED) {
1079 for (i = 0; i < adapter->req_rx_queues; i++)
1080 napi_schedule(&adapter->napi[i]);
1081 }
1082
1083 adapter->state = VNIC_OPEN;
1084 return rc;
1085}
1086
1087static int ibmvnic_open(struct net_device *netdev)
1088{
1089 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1090 int rc;
1091
1092 /* If device failover is pending, just set device state and return.
1093 * Device operation will be handled by reset routine.
1094 */
1095 if (adapter->failover_pending) {
1096 adapter->state = VNIC_OPEN;
1097 return 0;
1098 }
1099
1100 mutex_lock(&adapter->reset_lock);
1101
1102 if (adapter->state != VNIC_CLOSED) {
1103 rc = ibmvnic_login(netdev);
1104 if (rc) {
1105 mutex_unlock(&adapter->reset_lock);
1106 return rc;
1107 }
1108
1109 rc = init_resources(adapter);
1110 if (rc) {
1111 netdev_err(netdev, "failed to initialize resources\n");
1112 release_resources(adapter);
1113 mutex_unlock(&adapter->reset_lock);
1114 return rc;
1115 }
1116 }
1117
1118 rc = __ibmvnic_open(netdev);
1119 netif_carrier_on(netdev);
1120
1121 mutex_unlock(&adapter->reset_lock);
1122
1123 return rc;
1124}
1125
1126static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1127{
1128 struct ibmvnic_rx_pool *rx_pool;
1129 struct ibmvnic_rx_buff *rx_buff;
1130 u64 rx_entries;
1131 int rx_scrqs;
1132 int i, j;
1133
1134 if (!adapter->rx_pool)
1135 return;
1136
1137 rx_scrqs = adapter->num_active_rx_pools;
1138 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1139
1140 /* Free any remaining skbs in the rx buffer pools */
1141 for (i = 0; i < rx_scrqs; i++) {
1142 rx_pool = &adapter->rx_pool[i];
1143 if (!rx_pool || !rx_pool->rx_buff)
1144 continue;
1145
1146 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1147 for (j = 0; j < rx_entries; j++) {
1148 rx_buff = &rx_pool->rx_buff[j];
1149 if (rx_buff && rx_buff->skb) {
1150 dev_kfree_skb_any(rx_buff->skb);
1151 rx_buff->skb = NULL;
1152 }
1153 }
1154 }
1155}
1156
1157static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1158 struct ibmvnic_tx_pool *tx_pool)
1159{
1160 struct ibmvnic_tx_buff *tx_buff;
1161 u64 tx_entries;
1162 int i;
1163
1164 if (!tx_pool || !tx_pool->tx_buff)
1165 return;
1166
1167 tx_entries = tx_pool->num_buffers;
1168
1169 for (i = 0; i < tx_entries; i++) {
1170 tx_buff = &tx_pool->tx_buff[i];
1171 if (tx_buff && tx_buff->skb) {
1172 dev_kfree_skb_any(tx_buff->skb);
1173 tx_buff->skb = NULL;
1174 }
1175 }
1176}
1177
1178static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1179{
1180 int tx_scrqs;
1181 int i;
1182
1183 if (!adapter->tx_pool || !adapter->tso_pool)
1184 return;
1185
1186 tx_scrqs = adapter->num_active_tx_pools;
1187
1188 /* Free any remaining skbs in the tx buffer pools */
1189 for (i = 0; i < tx_scrqs; i++) {
1190 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1191 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1192 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1193 }
1194}
1195
1196static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1197{
1198 struct net_device *netdev = adapter->netdev;
1199 int i;
1200
1201 if (adapter->tx_scrq) {
1202 for (i = 0; i < adapter->req_tx_queues; i++)
1203 if (adapter->tx_scrq[i]->irq) {
1204 netdev_dbg(netdev,
1205 "Disabling tx_scrq[%d] irq\n", i);
1206 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1207 disable_irq(adapter->tx_scrq[i]->irq);
1208 }
1209 }
1210
1211 if (adapter->rx_scrq) {
1212 for (i = 0; i < adapter->req_rx_queues; i++) {
1213 if (adapter->rx_scrq[i]->irq) {
1214 netdev_dbg(netdev,
1215 "Disabling rx_scrq[%d] irq\n", i);
1216 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1217 disable_irq(adapter->rx_scrq[i]->irq);
1218 }
1219 }
1220 }
1221}
1222
1223static void ibmvnic_cleanup(struct net_device *netdev)
1224{
1225 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1226
1227 /* ensure that transmissions are stopped if called by do_reset */
1228 if (adapter->resetting)
1229 netif_tx_disable(netdev);
1230 else
1231 netif_tx_stop_all_queues(netdev);
1232
1233 ibmvnic_napi_disable(adapter);
1234 ibmvnic_disable_irqs(adapter);
1235
1236 clean_rx_pools(adapter);
1237 clean_tx_pools(adapter);
1238}
1239
1240static int __ibmvnic_close(struct net_device *netdev)
1241{
1242 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1243 int rc = 0;
1244
1245 adapter->state = VNIC_CLOSING;
1246 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1247 if (rc)
1248 return rc;
1249 adapter->state = VNIC_CLOSED;
1250 return 0;
1251}
1252
1253static int ibmvnic_close(struct net_device *netdev)
1254{
1255 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1256 int rc;
1257
1258 /* If device failover is pending, just set device state and return.
1259 * Device operation will be handled by reset routine.
1260 */
1261 if (adapter->failover_pending) {
1262 adapter->state = VNIC_CLOSED;
1263 return 0;
1264 }
1265
1266 mutex_lock(&adapter->reset_lock);
1267 rc = __ibmvnic_close(netdev);
1268 ibmvnic_cleanup(netdev);
1269 mutex_unlock(&adapter->reset_lock);
1270
1271 return rc;
1272}
1273
1274/**
1275 * build_hdr_data - creates L2/L3/L4 header data buffer
1276 * @hdr_field - bitfield determining needed headers
1277 * @skb - socket buffer
1278 * @hdr_len - array of header lengths
1279 * @tot_len - total length of data
1280 *
1281 * Reads hdr_field to determine which headers are needed by firmware.
1282 * Builds a buffer containing these headers. Saves individual header
1283 * lengths and total buffer length to be used to build descriptors.
1284 */
1285static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1286 int *hdr_len, u8 *hdr_data)
1287{
1288 int len = 0;
1289 u8 *hdr;
1290
1291 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1292 hdr_len[0] = sizeof(struct vlan_ethhdr);
1293 else
1294 hdr_len[0] = sizeof(struct ethhdr);
1295
1296 if (skb->protocol == htons(ETH_P_IP)) {
1297 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1298 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1299 hdr_len[2] = tcp_hdrlen(skb);
1300 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1301 hdr_len[2] = sizeof(struct udphdr);
1302 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1303 hdr_len[1] = sizeof(struct ipv6hdr);
1304 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1305 hdr_len[2] = tcp_hdrlen(skb);
1306 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1307 hdr_len[2] = sizeof(struct udphdr);
1308 } else if (skb->protocol == htons(ETH_P_ARP)) {
1309 hdr_len[1] = arp_hdr_len(skb->dev);
1310 hdr_len[2] = 0;
1311 }
1312
1313 memset(hdr_data, 0, 120);
1314 if ((hdr_field >> 6) & 1) {
1315 hdr = skb_mac_header(skb);
1316 memcpy(hdr_data, hdr, hdr_len[0]);
1317 len += hdr_len[0];
1318 }
1319
1320 if ((hdr_field >> 5) & 1) {
1321 hdr = skb_network_header(skb);
1322 memcpy(hdr_data + len, hdr, hdr_len[1]);
1323 len += hdr_len[1];
1324 }
1325
1326 if ((hdr_field >> 4) & 1) {
1327 hdr = skb_transport_header(skb);
1328 memcpy(hdr_data + len, hdr, hdr_len[2]);
1329 len += hdr_len[2];
1330 }
1331 return len;
1332}
1333
1334/**
1335 * create_hdr_descs - create header and header extension descriptors
1336 * @hdr_field - bitfield determining needed headers
1337 * @data - buffer containing header data
1338 * @len - length of data buffer
1339 * @hdr_len - array of individual header lengths
1340 * @scrq_arr - descriptor array
1341 *
1342 * Creates header and, if needed, header extension descriptors and
1343 * places them in a descriptor array, scrq_arr
1344 */
1345
1346static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1347 union sub_crq *scrq_arr)
1348{
1349 union sub_crq hdr_desc;
1350 int tmp_len = len;
1351 int num_descs = 0;
1352 u8 *data, *cur;
1353 int tmp;
1354
1355 while (tmp_len > 0) {
1356 cur = hdr_data + len - tmp_len;
1357
1358 memset(&hdr_desc, 0, sizeof(hdr_desc));
1359 if (cur != hdr_data) {
1360 data = hdr_desc.hdr_ext.data;
1361 tmp = tmp_len > 29 ? 29 : tmp_len;
1362 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1363 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1364 hdr_desc.hdr_ext.len = tmp;
1365 } else {
1366 data = hdr_desc.hdr.data;
1367 tmp = tmp_len > 24 ? 24 : tmp_len;
1368 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1369 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1370 hdr_desc.hdr.len = tmp;
1371 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1372 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1373 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1374 hdr_desc.hdr.flag = hdr_field << 1;
1375 }
1376 memcpy(data, cur, tmp);
1377 tmp_len -= tmp;
1378 *scrq_arr = hdr_desc;
1379 scrq_arr++;
1380 num_descs++;
1381 }
1382
1383 return num_descs;
1384}
1385
1386/**
1387 * build_hdr_descs_arr - build a header descriptor array
1388 * @skb - socket buffer
1389 * @num_entries - number of descriptors to be sent
1390 * @subcrq - first TX descriptor
1391 * @hdr_field - bit field determining which headers will be sent
1392 *
1393 * This function will build a TX descriptor array with applicable
1394 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1395 */
1396
1397static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1398 int *num_entries, u8 hdr_field)
1399{
1400 int hdr_len[3] = {0, 0, 0};
1401 int tot_len;
1402 u8 *hdr_data = txbuff->hdr_data;
1403
1404 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1405 txbuff->hdr_data);
1406 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1407 txbuff->indir_arr + 1);
1408}
1409
1410static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1411 struct net_device *netdev)
1412{
1413 /* For some backing devices, mishandling of small packets
1414 * can result in a loss of connection or TX stall. Device
1415 * architects recommend that no packet should be smaller
1416 * than the minimum MTU value provided to the driver, so
1417 * pad any packets to that length
1418 */
1419 if (skb->len < netdev->min_mtu)
1420 return skb_put_padto(skb, netdev->min_mtu);
1421
1422 return 0;
1423}
1424
1425static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1426{
1427 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1428 int queue_num = skb_get_queue_mapping(skb);
1429 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1430 struct device *dev = &adapter->vdev->dev;
1431 struct ibmvnic_tx_buff *tx_buff = NULL;
1432 struct ibmvnic_sub_crq_queue *tx_scrq;
1433 struct ibmvnic_tx_pool *tx_pool;
1434 unsigned int tx_send_failed = 0;
1435 unsigned int tx_map_failed = 0;
1436 unsigned int tx_dropped = 0;
1437 unsigned int tx_packets = 0;
1438 unsigned int tx_bytes = 0;
1439 dma_addr_t data_dma_addr;
1440 struct netdev_queue *txq;
1441 unsigned long lpar_rc;
1442 union sub_crq tx_crq;
1443 unsigned int offset;
1444 int num_entries = 1;
1445 unsigned char *dst;
1446 u64 *handle_array;
1447 int index = 0;
1448 u8 proto = 0;
1449 int ret = 0;
1450
1451 if (adapter->resetting) {
1452 if (!netif_subqueue_stopped(netdev, skb))
1453 netif_stop_subqueue(netdev, queue_num);
1454 dev_kfree_skb_any(skb);
1455
1456 tx_send_failed++;
1457 tx_dropped++;
1458 ret = NETDEV_TX_OK;
1459 goto out;
1460 }
1461
1462 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1463 tx_dropped++;
1464 tx_send_failed++;
1465 ret = NETDEV_TX_OK;
1466 goto out;
1467 }
1468 if (skb_is_gso(skb))
1469 tx_pool = &adapter->tso_pool[queue_num];
1470 else
1471 tx_pool = &adapter->tx_pool[queue_num];
1472
1473 tx_scrq = adapter->tx_scrq[queue_num];
1474 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1475 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1476 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1477
1478 index = tx_pool->free_map[tx_pool->consumer_index];
1479
1480 if (index == IBMVNIC_INVALID_MAP) {
1481 dev_kfree_skb_any(skb);
1482 tx_send_failed++;
1483 tx_dropped++;
1484 ret = NETDEV_TX_OK;
1485 goto out;
1486 }
1487
1488 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1489
1490 offset = index * tx_pool->buf_size;
1491 dst = tx_pool->long_term_buff.buff + offset;
1492 memset(dst, 0, tx_pool->buf_size);
1493 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1494
1495 if (skb_shinfo(skb)->nr_frags) {
1496 int cur, i;
1497
1498 /* Copy the head */
1499 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1500 cur = skb_headlen(skb);
1501
1502 /* Copy the frags */
1503 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1504 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1505
1506 memcpy(dst + cur,
1507 page_address(skb_frag_page(frag)) +
1508 frag->page_offset, skb_frag_size(frag));
1509 cur += skb_frag_size(frag);
1510 }
1511 } else {
1512 skb_copy_from_linear_data(skb, dst, skb->len);
1513 }
1514
1515 tx_pool->consumer_index =
1516 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1517
1518 tx_buff = &tx_pool->tx_buff[index];
1519 tx_buff->skb = skb;
1520 tx_buff->data_dma[0] = data_dma_addr;
1521 tx_buff->data_len[0] = skb->len;
1522 tx_buff->index = index;
1523 tx_buff->pool_index = queue_num;
1524 tx_buff->last_frag = true;
1525
1526 memset(&tx_crq, 0, sizeof(tx_crq));
1527 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1528 tx_crq.v1.type = IBMVNIC_TX_DESC;
1529 tx_crq.v1.n_crq_elem = 1;
1530 tx_crq.v1.n_sge = 1;
1531 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1532
1533 if (skb_is_gso(skb))
1534 tx_crq.v1.correlator =
1535 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1536 else
1537 tx_crq.v1.correlator = cpu_to_be32(index);
1538 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1539 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1540 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1541
1542 if (adapter->vlan_header_insertion) {
1543 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1544 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1545 }
1546
1547 if (skb->protocol == htons(ETH_P_IP)) {
1548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1549 proto = ip_hdr(skb)->protocol;
1550 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1551 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1552 proto = ipv6_hdr(skb)->nexthdr;
1553 }
1554
1555 if (proto == IPPROTO_TCP)
1556 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1557 else if (proto == IPPROTO_UDP)
1558 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1559
1560 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1561 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1562 hdrs += 2;
1563 }
1564 if (skb_is_gso(skb)) {
1565 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1566 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1567 hdrs += 2;
1568 }
1569 /* determine if l2/3/4 headers are sent to firmware */
1570 if ((*hdrs >> 7) & 1) {
1571 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1572 tx_crq.v1.n_crq_elem = num_entries;
1573 tx_buff->num_entries = num_entries;
1574 tx_buff->indir_arr[0] = tx_crq;
1575 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1576 sizeof(tx_buff->indir_arr),
1577 DMA_TO_DEVICE);
1578 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1579 dev_kfree_skb_any(skb);
1580 tx_buff->skb = NULL;
1581 if (!firmware_has_feature(FW_FEATURE_CMO))
1582 dev_err(dev, "tx: unable to map descriptor array\n");
1583 tx_map_failed++;
1584 tx_dropped++;
1585 ret = NETDEV_TX_OK;
1586 goto tx_err_out;
1587 }
1588 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1589 (u64)tx_buff->indir_dma,
1590 (u64)num_entries);
1591 } else {
1592 tx_buff->num_entries = num_entries;
1593 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1594 &tx_crq);
1595 }
1596 if (lpar_rc != H_SUCCESS) {
1597 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1598 dev_kfree_skb_any(skb);
1599 tx_buff->skb = NULL;
1600
1601 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1602 /* Disable TX and report carrier off if queue is closed
1603 * or pending failover.
1604 * Firmware guarantees that a signal will be sent to the
1605 * driver, triggering a reset or some other action.
1606 */
1607 netif_tx_stop_all_queues(netdev);
1608 netif_carrier_off(netdev);
1609 }
1610
1611 tx_send_failed++;
1612 tx_dropped++;
1613 ret = NETDEV_TX_OK;
1614 goto tx_err_out;
1615 }
1616
1617 if (atomic_add_return(num_entries, &tx_scrq->used)
1618 >= adapter->req_tx_entries_per_subcrq) {
1619 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1620 netif_stop_subqueue(netdev, queue_num);
1621 }
1622
1623 tx_packets++;
1624 tx_bytes += skb->len;
1625 txq->trans_start = jiffies;
1626 ret = NETDEV_TX_OK;
1627 goto out;
1628
1629tx_err_out:
1630 /* roll back consumer index and map array*/
1631 if (tx_pool->consumer_index == 0)
1632 tx_pool->consumer_index =
1633 tx_pool->num_buffers - 1;
1634 else
1635 tx_pool->consumer_index--;
1636 tx_pool->free_map[tx_pool->consumer_index] = index;
1637out:
1638 netdev->stats.tx_dropped += tx_dropped;
1639 netdev->stats.tx_bytes += tx_bytes;
1640 netdev->stats.tx_packets += tx_packets;
1641 adapter->tx_send_failed += tx_send_failed;
1642 adapter->tx_map_failed += tx_map_failed;
1643 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1644 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1645 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1646
1647 return ret;
1648}
1649
1650static void ibmvnic_set_multi(struct net_device *netdev)
1651{
1652 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1653 struct netdev_hw_addr *ha;
1654 union ibmvnic_crq crq;
1655
1656 memset(&crq, 0, sizeof(crq));
1657 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1658 crq.request_capability.cmd = REQUEST_CAPABILITY;
1659
1660 if (netdev->flags & IFF_PROMISC) {
1661 if (!adapter->promisc_supported)
1662 return;
1663 } else {
1664 if (netdev->flags & IFF_ALLMULTI) {
1665 /* Accept all multicast */
1666 memset(&crq, 0, sizeof(crq));
1667 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1668 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1669 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1670 ibmvnic_send_crq(adapter, &crq);
1671 } else if (netdev_mc_empty(netdev)) {
1672 /* Reject all multicast */
1673 memset(&crq, 0, sizeof(crq));
1674 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1675 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1676 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1677 ibmvnic_send_crq(adapter, &crq);
1678 } else {
1679 /* Accept one or more multicast(s) */
1680 netdev_for_each_mc_addr(ha, netdev) {
1681 memset(&crq, 0, sizeof(crq));
1682 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1683 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1684 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1685 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1686 ha->addr);
1687 ibmvnic_send_crq(adapter, &crq);
1688 }
1689 }
1690 }
1691}
1692
1693static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1694{
1695 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1696 struct sockaddr *addr = p;
1697 union ibmvnic_crq crq;
1698
1699 if (!is_valid_ether_addr(addr->sa_data))
1700 return -EADDRNOTAVAIL;
1701
1702 memset(&crq, 0, sizeof(crq));
1703 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1704 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1705 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1706
1707 init_completion(&adapter->fw_done);
1708 ibmvnic_send_crq(adapter, &crq);
1709 wait_for_completion(&adapter->fw_done);
1710 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1711 return adapter->fw_done_rc ? -EIO : 0;
1712}
1713
1714static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1715{
1716 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1717 struct sockaddr *addr = p;
1718 int rc;
1719
1720 if (adapter->state == VNIC_PROBED) {
1721 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1722 adapter->mac_change_pending = true;
1723 return 0;
1724 }
1725
1726 rc = __ibmvnic_set_mac(netdev, addr);
1727
1728 return rc;
1729}
1730
1731/**
1732 * do_reset returns zero if we are able to keep processing reset events, or
1733 * non-zero if we hit a fatal error and must halt.
1734 */
1735static int do_reset(struct ibmvnic_adapter *adapter,
1736 struct ibmvnic_rwi *rwi, u32 reset_state)
1737{
1738 u64 old_num_rx_queues, old_num_tx_queues;
1739 struct net_device *netdev = adapter->netdev;
1740 int i, rc;
1741
1742 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1743 rwi->reset_reason);
1744
1745 netif_carrier_off(netdev);
1746 adapter->reset_reason = rwi->reset_reason;
1747
1748 old_num_rx_queues = adapter->req_rx_queues;
1749 old_num_tx_queues = adapter->req_tx_queues;
1750
1751 ibmvnic_cleanup(netdev);
1752
1753 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1754 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1755 rc = __ibmvnic_close(netdev);
1756 if (rc)
1757 return rc;
1758 }
1759
1760 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1761 adapter->wait_for_reset) {
1762 release_resources(adapter);
1763 release_sub_crqs(adapter, 1);
1764 release_crq_queue(adapter);
1765 }
1766
1767 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1768 /* remove the closed state so when we call open it appears
1769 * we are coming from the probed state.
1770 */
1771 adapter->state = VNIC_PROBED;
1772
1773 if (adapter->wait_for_reset) {
1774 rc = init_crq_queue(adapter);
1775 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1776 rc = ibmvnic_reenable_crq_queue(adapter);
1777 release_sub_crqs(adapter, 1);
1778 } else {
1779 rc = ibmvnic_reset_crq(adapter);
1780 if (!rc)
1781 rc = vio_enable_interrupts(adapter->vdev);
1782 }
1783
1784 if (rc) {
1785 netdev_err(adapter->netdev,
1786 "Couldn't initialize crq. rc=%d\n", rc);
1787 return rc;
1788 }
1789
1790 rc = ibmvnic_init(adapter);
1791 if (rc)
1792 return IBMVNIC_INIT_FAILED;
1793
1794 /* If the adapter was in PROBE state prior to the reset,
1795 * exit here.
1796 */
1797 if (reset_state == VNIC_PROBED)
1798 return 0;
1799
1800 rc = ibmvnic_login(netdev);
1801 if (rc) {
1802 adapter->state = VNIC_PROBED;
1803 return 0;
1804 }
1805
1806 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1807 adapter->wait_for_reset) {
1808 rc = init_resources(adapter);
1809 if (rc)
1810 return rc;
1811 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1812 adapter->req_tx_queues != old_num_tx_queues) {
1813 adapter->map_id = 1;
1814 release_rx_pools(adapter);
1815 release_tx_pools(adapter);
1816 init_rx_pools(netdev);
1817 init_tx_pools(netdev);
1818
1819 release_napi(adapter);
1820 init_napi(adapter);
1821 } else {
1822 rc = reset_tx_pools(adapter);
1823 if (rc)
1824 return rc;
1825
1826 rc = reset_rx_pools(adapter);
1827 if (rc)
1828 return rc;
1829 }
1830 ibmvnic_disable_irqs(adapter);
1831 }
1832 adapter->state = VNIC_CLOSED;
1833
1834 if (reset_state == VNIC_CLOSED)
1835 return 0;
1836
1837 rc = __ibmvnic_open(netdev);
1838 if (rc) {
1839 if (list_empty(&adapter->rwi_list))
1840 adapter->state = VNIC_CLOSED;
1841 else
1842 adapter->state = reset_state;
1843
1844 return 0;
1845 }
1846
1847 /* kick napi */
1848 for (i = 0; i < adapter->req_rx_queues; i++)
1849 napi_schedule(&adapter->napi[i]);
1850
1851 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1852 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1853 netdev_notify_peers(netdev);
1854
1855 netif_carrier_on(netdev);
1856
1857 return 0;
1858}
1859
1860static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1861{
1862 struct ibmvnic_rwi *rwi;
1863
1864 mutex_lock(&adapter->rwi_lock);
1865
1866 if (!list_empty(&adapter->rwi_list)) {
1867 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1868 list);
1869 list_del(&rwi->list);
1870 } else {
1871 rwi = NULL;
1872 }
1873
1874 mutex_unlock(&adapter->rwi_lock);
1875 return rwi;
1876}
1877
1878static void free_all_rwi(struct ibmvnic_adapter *adapter)
1879{
1880 struct ibmvnic_rwi *rwi;
1881
1882 rwi = get_next_rwi(adapter);
1883 while (rwi) {
1884 kfree(rwi);
1885 rwi = get_next_rwi(adapter);
1886 }
1887}
1888
1889static void __ibmvnic_reset(struct work_struct *work)
1890{
1891 struct ibmvnic_rwi *rwi;
1892 struct ibmvnic_adapter *adapter;
1893 struct net_device *netdev;
1894 u32 reset_state;
1895 int rc = 0;
1896
1897 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1898 netdev = adapter->netdev;
1899
1900 mutex_lock(&adapter->reset_lock);
1901 adapter->resetting = true;
1902 reset_state = adapter->state;
1903
1904 rwi = get_next_rwi(adapter);
1905 while (rwi) {
1906 rc = do_reset(adapter, rwi, reset_state);
1907 kfree(rwi);
1908 if (rc && rc != IBMVNIC_INIT_FAILED)
1909 break;
1910
1911 rwi = get_next_rwi(adapter);
1912 }
1913
1914 if (adapter->wait_for_reset) {
1915 adapter->wait_for_reset = false;
1916 adapter->reset_done_rc = rc;
1917 complete(&adapter->reset_done);
1918 }
1919
1920 if (rc) {
1921 netdev_dbg(adapter->netdev, "Reset failed\n");
1922 free_all_rwi(adapter);
1923 mutex_unlock(&adapter->reset_lock);
1924 return;
1925 }
1926
1927 adapter->resetting = false;
1928 mutex_unlock(&adapter->reset_lock);
1929}
1930
1931static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
1932 enum ibmvnic_reset_reason reason)
1933{
1934 struct ibmvnic_rwi *rwi, *tmp;
1935 struct net_device *netdev = adapter->netdev;
1936 struct list_head *entry;
1937 int ret;
1938
1939 if (adapter->state == VNIC_REMOVING ||
1940 adapter->state == VNIC_REMOVED ||
1941 adapter->failover_pending) {
1942 ret = EBUSY;
1943 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
1944 goto err;
1945 }
1946
1947 if (adapter->state == VNIC_PROBING) {
1948 netdev_warn(netdev, "Adapter reset during probe\n");
1949 ret = adapter->init_done_rc = EAGAIN;
1950 goto err;
1951 }
1952
1953 mutex_lock(&adapter->rwi_lock);
1954
1955 list_for_each(entry, &adapter->rwi_list) {
1956 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1957 if (tmp->reset_reason == reason) {
1958 netdev_dbg(netdev, "Skipping matching reset\n");
1959 mutex_unlock(&adapter->rwi_lock);
1960 ret = EBUSY;
1961 goto err;
1962 }
1963 }
1964
1965 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1966 if (!rwi) {
1967 mutex_unlock(&adapter->rwi_lock);
1968 ibmvnic_close(netdev);
1969 ret = ENOMEM;
1970 goto err;
1971 }
1972
1973 rwi->reset_reason = reason;
1974 list_add_tail(&rwi->list, &adapter->rwi_list);
1975 mutex_unlock(&adapter->rwi_lock);
1976
1977 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1978 schedule_work(&adapter->ibmvnic_reset);
1979
1980 return 0;
1981err:
1982 if (adapter->wait_for_reset)
1983 adapter->wait_for_reset = false;
1984 return -ret;
1985}
1986
1987static void ibmvnic_tx_timeout(struct net_device *dev)
1988{
1989 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1990
1991 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1992}
1993
1994static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1995 struct ibmvnic_rx_buff *rx_buff)
1996{
1997 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1998
1999 rx_buff->skb = NULL;
2000
2001 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2002 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2003
2004 atomic_dec(&pool->available);
2005}
2006
2007static int ibmvnic_poll(struct napi_struct *napi, int budget)
2008{
2009 struct net_device *netdev = napi->dev;
2010 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2011 int scrq_num = (int)(napi - adapter->napi);
2012 int frames_processed = 0;
2013
2014restart_poll:
2015 while (frames_processed < budget) {
2016 struct sk_buff *skb;
2017 struct ibmvnic_rx_buff *rx_buff;
2018 union sub_crq *next;
2019 u32 length;
2020 u16 offset;
2021 u8 flags = 0;
2022
2023 if (unlikely(adapter->resetting &&
2024 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2025 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2026 napi_complete_done(napi, frames_processed);
2027 return frames_processed;
2028 }
2029
2030 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2031 break;
2032 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2033 rx_buff =
2034 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2035 rx_comp.correlator);
2036 /* do error checking */
2037 if (next->rx_comp.rc) {
2038 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2039 be16_to_cpu(next->rx_comp.rc));
2040 /* free the entry */
2041 next->rx_comp.first = 0;
2042 dev_kfree_skb_any(rx_buff->skb);
2043 remove_buff_from_pool(adapter, rx_buff);
2044 continue;
2045 } else if (!rx_buff->skb) {
2046 /* free the entry */
2047 next->rx_comp.first = 0;
2048 remove_buff_from_pool(adapter, rx_buff);
2049 continue;
2050 }
2051
2052 length = be32_to_cpu(next->rx_comp.len);
2053 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2054 flags = next->rx_comp.flags;
2055 skb = rx_buff->skb;
2056 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2057 length);
2058
2059 /* VLAN Header has been stripped by the system firmware and
2060 * needs to be inserted by the driver
2061 */
2062 if (adapter->rx_vlan_header_insertion &&
2063 (flags & IBMVNIC_VLAN_STRIPPED))
2064 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2065 ntohs(next->rx_comp.vlan_tci));
2066
2067 /* free the entry */
2068 next->rx_comp.first = 0;
2069 remove_buff_from_pool(adapter, rx_buff);
2070
2071 skb_put(skb, length);
2072 skb->protocol = eth_type_trans(skb, netdev);
2073 skb_record_rx_queue(skb, scrq_num);
2074
2075 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2076 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2077 skb->ip_summed = CHECKSUM_UNNECESSARY;
2078 }
2079
2080 length = skb->len;
2081 napi_gro_receive(napi, skb); /* send it up */
2082 netdev->stats.rx_packets++;
2083 netdev->stats.rx_bytes += length;
2084 adapter->rx_stats_buffers[scrq_num].packets++;
2085 adapter->rx_stats_buffers[scrq_num].bytes += length;
2086 frames_processed++;
2087 }
2088
2089 if (adapter->state != VNIC_CLOSING)
2090 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2091
2092 if (frames_processed < budget) {
2093 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2094 napi_complete_done(napi, frames_processed);
2095 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2096 napi_reschedule(napi)) {
2097 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2098 goto restart_poll;
2099 }
2100 }
2101 return frames_processed;
2102}
2103
2104#ifdef CONFIG_NET_POLL_CONTROLLER
2105static void ibmvnic_netpoll_controller(struct net_device *dev)
2106{
2107 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2108 int i;
2109
2110 replenish_pools(netdev_priv(dev));
2111 for (i = 0; i < adapter->req_rx_queues; i++)
2112 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
2113 adapter->rx_scrq[i]);
2114}
2115#endif
2116
2117static int wait_for_reset(struct ibmvnic_adapter *adapter)
2118{
2119 int rc, ret;
2120
2121 adapter->fallback.mtu = adapter->req_mtu;
2122 adapter->fallback.rx_queues = adapter->req_rx_queues;
2123 adapter->fallback.tx_queues = adapter->req_tx_queues;
2124 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2125 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2126
2127 init_completion(&adapter->reset_done);
2128 adapter->wait_for_reset = true;
2129 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2130 if (rc)
2131 return rc;
2132 wait_for_completion(&adapter->reset_done);
2133
2134 ret = 0;
2135 if (adapter->reset_done_rc) {
2136 ret = -EIO;
2137 adapter->desired.mtu = adapter->fallback.mtu;
2138 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2139 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2140 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2141 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2142
2143 init_completion(&adapter->reset_done);
2144 adapter->wait_for_reset = true;
2145 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2146 if (rc)
2147 return ret;
2148 wait_for_completion(&adapter->reset_done);
2149 }
2150 adapter->wait_for_reset = false;
2151
2152 return ret;
2153}
2154
2155static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2156{
2157 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2158
2159 adapter->desired.mtu = new_mtu + ETH_HLEN;
2160
2161 return wait_for_reset(adapter);
2162}
2163
2164static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2165 struct net_device *dev,
2166 netdev_features_t features)
2167{
2168 /* Some backing hardware adapters can not
2169 * handle packets with a MSS less than 224
2170 * or with only one segment.
2171 */
2172 if (skb_is_gso(skb)) {
2173 if (skb_shinfo(skb)->gso_size < 224 ||
2174 skb_shinfo(skb)->gso_segs == 1)
2175 features &= ~NETIF_F_GSO_MASK;
2176 }
2177
2178 return features;
2179}
2180
2181static const struct net_device_ops ibmvnic_netdev_ops = {
2182 .ndo_open = ibmvnic_open,
2183 .ndo_stop = ibmvnic_close,
2184 .ndo_start_xmit = ibmvnic_xmit,
2185 .ndo_set_rx_mode = ibmvnic_set_multi,
2186 .ndo_set_mac_address = ibmvnic_set_mac,
2187 .ndo_validate_addr = eth_validate_addr,
2188 .ndo_tx_timeout = ibmvnic_tx_timeout,
2189#ifdef CONFIG_NET_POLL_CONTROLLER
2190 .ndo_poll_controller = ibmvnic_netpoll_controller,
2191#endif
2192 .ndo_change_mtu = ibmvnic_change_mtu,
2193 .ndo_features_check = ibmvnic_features_check,
2194};
2195
2196/* ethtool functions */
2197
2198static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2199 struct ethtool_link_ksettings *cmd)
2200{
2201 u32 supported, advertising;
2202
2203 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2204 SUPPORTED_FIBRE);
2205 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2206 ADVERTISED_FIBRE);
2207 cmd->base.speed = SPEED_1000;
2208 cmd->base.duplex = DUPLEX_FULL;
2209 cmd->base.port = PORT_FIBRE;
2210 cmd->base.phy_address = 0;
2211 cmd->base.autoneg = AUTONEG_ENABLE;
2212
2213 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2214 supported);
2215 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2216 advertising);
2217
2218 return 0;
2219}
2220
2221static void ibmvnic_get_drvinfo(struct net_device *netdev,
2222 struct ethtool_drvinfo *info)
2223{
2224 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2225
2226 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2227 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2228 strlcpy(info->fw_version, adapter->fw_version,
2229 sizeof(info->fw_version));
2230}
2231
2232static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2233{
2234 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2235
2236 return adapter->msg_enable;
2237}
2238
2239static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2240{
2241 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2242
2243 adapter->msg_enable = data;
2244}
2245
2246static u32 ibmvnic_get_link(struct net_device *netdev)
2247{
2248 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2249
2250 /* Don't need to send a query because we request a logical link up at
2251 * init and then we wait for link state indications
2252 */
2253 return adapter->logical_link_state;
2254}
2255
2256static void ibmvnic_get_ringparam(struct net_device *netdev,
2257 struct ethtool_ringparam *ring)
2258{
2259 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2260
2261 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2262 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2263 ring->rx_mini_max_pending = 0;
2264 ring->rx_jumbo_max_pending = 0;
2265 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2266 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2267 ring->rx_mini_pending = 0;
2268 ring->rx_jumbo_pending = 0;
2269}
2270
2271static int ibmvnic_set_ringparam(struct net_device *netdev,
2272 struct ethtool_ringparam *ring)
2273{
2274 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2275
2276 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2277 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2278 netdev_err(netdev, "Invalid request.\n");
2279 netdev_err(netdev, "Max tx buffers = %llu\n",
2280 adapter->max_rx_add_entries_per_subcrq);
2281 netdev_err(netdev, "Max rx buffers = %llu\n",
2282 adapter->max_tx_entries_per_subcrq);
2283 return -EINVAL;
2284 }
2285
2286 adapter->desired.rx_entries = ring->rx_pending;
2287 adapter->desired.tx_entries = ring->tx_pending;
2288
2289 return wait_for_reset(adapter);
2290}
2291
2292static void ibmvnic_get_channels(struct net_device *netdev,
2293 struct ethtool_channels *channels)
2294{
2295 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2296
2297 channels->max_rx = adapter->max_rx_queues;
2298 channels->max_tx = adapter->max_tx_queues;
2299 channels->max_other = 0;
2300 channels->max_combined = 0;
2301 channels->rx_count = adapter->req_rx_queues;
2302 channels->tx_count = adapter->req_tx_queues;
2303 channels->other_count = 0;
2304 channels->combined_count = 0;
2305}
2306
2307static int ibmvnic_set_channels(struct net_device *netdev,
2308 struct ethtool_channels *channels)
2309{
2310 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2311
2312 adapter->desired.rx_queues = channels->rx_count;
2313 adapter->desired.tx_queues = channels->tx_count;
2314
2315 return wait_for_reset(adapter);
2316}
2317
2318static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2319{
2320 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2321 int i;
2322
2323 if (stringset != ETH_SS_STATS)
2324 return;
2325
2326 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2327 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2328
2329 for (i = 0; i < adapter->req_tx_queues; i++) {
2330 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2331 data += ETH_GSTRING_LEN;
2332
2333 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2334 data += ETH_GSTRING_LEN;
2335
2336 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2337 data += ETH_GSTRING_LEN;
2338 }
2339
2340 for (i = 0; i < adapter->req_rx_queues; i++) {
2341 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2342 data += ETH_GSTRING_LEN;
2343
2344 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2345 data += ETH_GSTRING_LEN;
2346
2347 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2348 data += ETH_GSTRING_LEN;
2349 }
2350}
2351
2352static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2353{
2354 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2355
2356 switch (sset) {
2357 case ETH_SS_STATS:
2358 return ARRAY_SIZE(ibmvnic_stats) +
2359 adapter->req_tx_queues * NUM_TX_STATS +
2360 adapter->req_rx_queues * NUM_RX_STATS;
2361 default:
2362 return -EOPNOTSUPP;
2363 }
2364}
2365
2366static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2367 struct ethtool_stats *stats, u64 *data)
2368{
2369 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2370 union ibmvnic_crq crq;
2371 int i, j;
2372
2373 memset(&crq, 0, sizeof(crq));
2374 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2375 crq.request_statistics.cmd = REQUEST_STATISTICS;
2376 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2377 crq.request_statistics.len =
2378 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2379
2380 /* Wait for data to be written */
2381 init_completion(&adapter->stats_done);
2382 ibmvnic_send_crq(adapter, &crq);
2383 wait_for_completion(&adapter->stats_done);
2384
2385 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2386 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2387 ibmvnic_stats[i].offset));
2388
2389 for (j = 0; j < adapter->req_tx_queues; j++) {
2390 data[i] = adapter->tx_stats_buffers[j].packets;
2391 i++;
2392 data[i] = adapter->tx_stats_buffers[j].bytes;
2393 i++;
2394 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2395 i++;
2396 }
2397
2398 for (j = 0; j < adapter->req_rx_queues; j++) {
2399 data[i] = adapter->rx_stats_buffers[j].packets;
2400 i++;
2401 data[i] = adapter->rx_stats_buffers[j].bytes;
2402 i++;
2403 data[i] = adapter->rx_stats_buffers[j].interrupts;
2404 i++;
2405 }
2406}
2407
2408static const struct ethtool_ops ibmvnic_ethtool_ops = {
2409 .get_drvinfo = ibmvnic_get_drvinfo,
2410 .get_msglevel = ibmvnic_get_msglevel,
2411 .set_msglevel = ibmvnic_set_msglevel,
2412 .get_link = ibmvnic_get_link,
2413 .get_ringparam = ibmvnic_get_ringparam,
2414 .set_ringparam = ibmvnic_set_ringparam,
2415 .get_channels = ibmvnic_get_channels,
2416 .set_channels = ibmvnic_set_channels,
2417 .get_strings = ibmvnic_get_strings,
2418 .get_sset_count = ibmvnic_get_sset_count,
2419 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2420 .get_link_ksettings = ibmvnic_get_link_ksettings,
2421};
2422
2423/* Routines for managing CRQs/sCRQs */
2424
2425static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2426 struct ibmvnic_sub_crq_queue *scrq)
2427{
2428 int rc;
2429
2430 if (scrq->irq) {
2431 free_irq(scrq->irq, scrq);
2432 irq_dispose_mapping(scrq->irq);
2433 scrq->irq = 0;
2434 }
2435
2436 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2437 atomic_set(&scrq->used, 0);
2438 scrq->cur = 0;
2439
2440 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2441 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2442 return rc;
2443}
2444
2445static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2446{
2447 int i, rc;
2448
2449 for (i = 0; i < adapter->req_tx_queues; i++) {
2450 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2451 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2452 if (rc)
2453 return rc;
2454 }
2455
2456 for (i = 0; i < adapter->req_rx_queues; i++) {
2457 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2458 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2459 if (rc)
2460 return rc;
2461 }
2462
2463 return rc;
2464}
2465
2466static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2467 struct ibmvnic_sub_crq_queue *scrq,
2468 bool do_h_free)
2469{
2470 struct device *dev = &adapter->vdev->dev;
2471 long rc;
2472
2473 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2474
2475 if (do_h_free) {
2476 /* Close the sub-crqs */
2477 do {
2478 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2479 adapter->vdev->unit_address,
2480 scrq->crq_num);
2481 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2482
2483 if (rc) {
2484 netdev_err(adapter->netdev,
2485 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2486 scrq->crq_num, rc);
2487 }
2488 }
2489
2490 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2491 DMA_BIDIRECTIONAL);
2492 free_pages((unsigned long)scrq->msgs, 2);
2493 kfree(scrq);
2494}
2495
2496static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2497 *adapter)
2498{
2499 struct device *dev = &adapter->vdev->dev;
2500 struct ibmvnic_sub_crq_queue *scrq;
2501 int rc;
2502
2503 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2504 if (!scrq)
2505 return NULL;
2506
2507 scrq->msgs =
2508 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2509 if (!scrq->msgs) {
2510 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2511 goto zero_page_failed;
2512 }
2513
2514 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2515 DMA_BIDIRECTIONAL);
2516 if (dma_mapping_error(dev, scrq->msg_token)) {
2517 dev_warn(dev, "Couldn't map crq queue messages page\n");
2518 goto map_failed;
2519 }
2520
2521 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2522 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2523
2524 if (rc == H_RESOURCE)
2525 rc = ibmvnic_reset_crq(adapter);
2526
2527 if (rc == H_CLOSED) {
2528 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2529 } else if (rc) {
2530 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2531 goto reg_failed;
2532 }
2533
2534 scrq->adapter = adapter;
2535 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2536 spin_lock_init(&scrq->lock);
2537
2538 netdev_dbg(adapter->netdev,
2539 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2540 scrq->crq_num, scrq->hw_irq, scrq->irq);
2541
2542 return scrq;
2543
2544reg_failed:
2545 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2546 DMA_BIDIRECTIONAL);
2547map_failed:
2548 free_pages((unsigned long)scrq->msgs, 2);
2549zero_page_failed:
2550 kfree(scrq);
2551
2552 return NULL;
2553}
2554
2555static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2556{
2557 int i;
2558
2559 if (adapter->tx_scrq) {
2560 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2561 if (!adapter->tx_scrq[i])
2562 continue;
2563
2564 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2565 i);
2566 if (adapter->tx_scrq[i]->irq) {
2567 free_irq(adapter->tx_scrq[i]->irq,
2568 adapter->tx_scrq[i]);
2569 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2570 adapter->tx_scrq[i]->irq = 0;
2571 }
2572
2573 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2574 do_h_free);
2575 }
2576
2577 kfree(adapter->tx_scrq);
2578 adapter->tx_scrq = NULL;
2579 adapter->num_active_tx_scrqs = 0;
2580 }
2581
2582 if (adapter->rx_scrq) {
2583 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2584 if (!adapter->rx_scrq[i])
2585 continue;
2586
2587 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2588 i);
2589 if (adapter->rx_scrq[i]->irq) {
2590 free_irq(adapter->rx_scrq[i]->irq,
2591 adapter->rx_scrq[i]);
2592 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2593 adapter->rx_scrq[i]->irq = 0;
2594 }
2595
2596 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2597 do_h_free);
2598 }
2599
2600 kfree(adapter->rx_scrq);
2601 adapter->rx_scrq = NULL;
2602 adapter->num_active_rx_scrqs = 0;
2603 }
2604}
2605
2606static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2607 struct ibmvnic_sub_crq_queue *scrq)
2608{
2609 struct device *dev = &adapter->vdev->dev;
2610 unsigned long rc;
2611
2612 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2613 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2614 if (rc)
2615 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2616 scrq->hw_irq, rc);
2617 return rc;
2618}
2619
2620static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2621 struct ibmvnic_sub_crq_queue *scrq)
2622{
2623 struct device *dev = &adapter->vdev->dev;
2624 unsigned long rc;
2625
2626 if (scrq->hw_irq > 0x100000000ULL) {
2627 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2628 return 1;
2629 }
2630
2631 if (adapter->resetting &&
2632 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2633 u64 val = (0xff000000) | scrq->hw_irq;
2634
2635 rc = plpar_hcall_norets(H_EOI, val);
2636 if (rc)
2637 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2638 val, rc);
2639 }
2640
2641 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2642 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2643 if (rc)
2644 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2645 scrq->hw_irq, rc);
2646 return rc;
2647}
2648
2649static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2650 struct ibmvnic_sub_crq_queue *scrq)
2651{
2652 struct device *dev = &adapter->vdev->dev;
2653 struct ibmvnic_tx_pool *tx_pool;
2654 struct ibmvnic_tx_buff *txbuff;
2655 union sub_crq *next;
2656 int index;
2657 int i, j;
2658 u8 *first;
2659
2660restart_loop:
2661 while (pending_scrq(adapter, scrq)) {
2662 unsigned int pool = scrq->pool_index;
2663 int num_entries = 0;
2664
2665 next = ibmvnic_next_scrq(adapter, scrq);
2666 for (i = 0; i < next->tx_comp.num_comps; i++) {
2667 if (next->tx_comp.rcs[i]) {
2668 dev_err(dev, "tx error %x\n",
2669 next->tx_comp.rcs[i]);
2670 continue;
2671 }
2672 index = be32_to_cpu(next->tx_comp.correlators[i]);
2673 if (index & IBMVNIC_TSO_POOL_MASK) {
2674 tx_pool = &adapter->tso_pool[pool];
2675 index &= ~IBMVNIC_TSO_POOL_MASK;
2676 } else {
2677 tx_pool = &adapter->tx_pool[pool];
2678 }
2679
2680 txbuff = &tx_pool->tx_buff[index];
2681
2682 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2683 if (!txbuff->data_dma[j])
2684 continue;
2685
2686 txbuff->data_dma[j] = 0;
2687 }
2688 /* if sub_crq was sent indirectly */
2689 first = &txbuff->indir_arr[0].generic.first;
2690 if (*first == IBMVNIC_CRQ_CMD) {
2691 dma_unmap_single(dev, txbuff->indir_dma,
2692 sizeof(txbuff->indir_arr),
2693 DMA_TO_DEVICE);
2694 *first = 0;
2695 }
2696
2697 if (txbuff->last_frag) {
2698 dev_kfree_skb_any(txbuff->skb);
2699 txbuff->skb = NULL;
2700 }
2701
2702 num_entries += txbuff->num_entries;
2703
2704 tx_pool->free_map[tx_pool->producer_index] = index;
2705 tx_pool->producer_index =
2706 (tx_pool->producer_index + 1) %
2707 tx_pool->num_buffers;
2708 }
2709 /* remove tx_comp scrq*/
2710 next->tx_comp.first = 0;
2711
2712 if (atomic_sub_return(num_entries, &scrq->used) <=
2713 (adapter->req_tx_entries_per_subcrq / 2) &&
2714 __netif_subqueue_stopped(adapter->netdev,
2715 scrq->pool_index)) {
2716 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2717 netdev_dbg(adapter->netdev, "Started queue %d\n",
2718 scrq->pool_index);
2719 }
2720 }
2721
2722 enable_scrq_irq(adapter, scrq);
2723
2724 if (pending_scrq(adapter, scrq)) {
2725 disable_scrq_irq(adapter, scrq);
2726 goto restart_loop;
2727 }
2728
2729 return 0;
2730}
2731
2732static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2733{
2734 struct ibmvnic_sub_crq_queue *scrq = instance;
2735 struct ibmvnic_adapter *adapter = scrq->adapter;
2736
2737 disable_scrq_irq(adapter, scrq);
2738 ibmvnic_complete_tx(adapter, scrq);
2739
2740 return IRQ_HANDLED;
2741}
2742
2743static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2744{
2745 struct ibmvnic_sub_crq_queue *scrq = instance;
2746 struct ibmvnic_adapter *adapter = scrq->adapter;
2747
2748 /* When booting a kdump kernel we can hit pending interrupts
2749 * prior to completing driver initialization.
2750 */
2751 if (unlikely(adapter->state != VNIC_OPEN))
2752 return IRQ_NONE;
2753
2754 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2755
2756 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2757 disable_scrq_irq(adapter, scrq);
2758 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2759 }
2760
2761 return IRQ_HANDLED;
2762}
2763
2764static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2765{
2766 struct device *dev = &adapter->vdev->dev;
2767 struct ibmvnic_sub_crq_queue *scrq;
2768 int i = 0, j = 0;
2769 int rc = 0;
2770
2771 for (i = 0; i < adapter->req_tx_queues; i++) {
2772 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2773 i);
2774 scrq = adapter->tx_scrq[i];
2775 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2776
2777 if (!scrq->irq) {
2778 rc = -EINVAL;
2779 dev_err(dev, "Error mapping irq\n");
2780 goto req_tx_irq_failed;
2781 }
2782
2783 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2784 0, "ibmvnic_tx", scrq);
2785
2786 if (rc) {
2787 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2788 scrq->irq, rc);
2789 irq_dispose_mapping(scrq->irq);
2790 goto req_tx_irq_failed;
2791 }
2792 }
2793
2794 for (i = 0; i < adapter->req_rx_queues; i++) {
2795 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2796 i);
2797 scrq = adapter->rx_scrq[i];
2798 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2799 if (!scrq->irq) {
2800 rc = -EINVAL;
2801 dev_err(dev, "Error mapping irq\n");
2802 goto req_rx_irq_failed;
2803 }
2804 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2805 0, "ibmvnic_rx", scrq);
2806 if (rc) {
2807 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2808 scrq->irq, rc);
2809 irq_dispose_mapping(scrq->irq);
2810 goto req_rx_irq_failed;
2811 }
2812 }
2813 return rc;
2814
2815req_rx_irq_failed:
2816 for (j = 0; j < i; j++) {
2817 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2818 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2819 }
2820 i = adapter->req_tx_queues;
2821req_tx_irq_failed:
2822 for (j = 0; j < i; j++) {
2823 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2824 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2825 }
2826 release_sub_crqs(adapter, 1);
2827 return rc;
2828}
2829
2830static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2831{
2832 struct device *dev = &adapter->vdev->dev;
2833 struct ibmvnic_sub_crq_queue **allqueues;
2834 int registered_queues = 0;
2835 int total_queues;
2836 int more = 0;
2837 int i;
2838
2839 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2840
2841 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2842 if (!allqueues)
2843 return -1;
2844
2845 for (i = 0; i < total_queues; i++) {
2846 allqueues[i] = init_sub_crq_queue(adapter);
2847 if (!allqueues[i]) {
2848 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2849 break;
2850 }
2851 registered_queues++;
2852 }
2853
2854 /* Make sure we were able to register the minimum number of queues */
2855 if (registered_queues <
2856 adapter->min_tx_queues + adapter->min_rx_queues) {
2857 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2858 goto tx_failed;
2859 }
2860
2861 /* Distribute the failed allocated queues*/
2862 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2863 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2864 switch (i % 3) {
2865 case 0:
2866 if (adapter->req_rx_queues > adapter->min_rx_queues)
2867 adapter->req_rx_queues--;
2868 else
2869 more++;
2870 break;
2871 case 1:
2872 if (adapter->req_tx_queues > adapter->min_tx_queues)
2873 adapter->req_tx_queues--;
2874 else
2875 more++;
2876 break;
2877 }
2878 }
2879
2880 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2881 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2882 if (!adapter->tx_scrq)
2883 goto tx_failed;
2884
2885 for (i = 0; i < adapter->req_tx_queues; i++) {
2886 adapter->tx_scrq[i] = allqueues[i];
2887 adapter->tx_scrq[i]->pool_index = i;
2888 adapter->num_active_tx_scrqs++;
2889 }
2890
2891 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2892 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2893 if (!adapter->rx_scrq)
2894 goto rx_failed;
2895
2896 for (i = 0; i < adapter->req_rx_queues; i++) {
2897 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2898 adapter->rx_scrq[i]->scrq_num = i;
2899 adapter->num_active_rx_scrqs++;
2900 }
2901
2902 kfree(allqueues);
2903 return 0;
2904
2905rx_failed:
2906 kfree(adapter->tx_scrq);
2907 adapter->tx_scrq = NULL;
2908tx_failed:
2909 for (i = 0; i < registered_queues; i++)
2910 release_sub_crq_queue(adapter, allqueues[i], 1);
2911 kfree(allqueues);
2912 return -1;
2913}
2914
2915static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2916{
2917 struct device *dev = &adapter->vdev->dev;
2918 union ibmvnic_crq crq;
2919 int max_entries;
2920
2921 if (!retry) {
2922 /* Sub-CRQ entries are 32 byte long */
2923 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2924
2925 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2926 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2927 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2928 return;
2929 }
2930
2931 if (adapter->desired.mtu)
2932 adapter->req_mtu = adapter->desired.mtu;
2933 else
2934 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2935
2936 if (!adapter->desired.tx_entries)
2937 adapter->desired.tx_entries =
2938 adapter->max_tx_entries_per_subcrq;
2939 if (!adapter->desired.rx_entries)
2940 adapter->desired.rx_entries =
2941 adapter->max_rx_add_entries_per_subcrq;
2942
2943 max_entries = IBMVNIC_MAX_LTB_SIZE /
2944 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2945
2946 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2947 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2948 adapter->desired.tx_entries = max_entries;
2949 }
2950
2951 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2952 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2953 adapter->desired.rx_entries = max_entries;
2954 }
2955
2956 if (adapter->desired.tx_entries)
2957 adapter->req_tx_entries_per_subcrq =
2958 adapter->desired.tx_entries;
2959 else
2960 adapter->req_tx_entries_per_subcrq =
2961 adapter->max_tx_entries_per_subcrq;
2962
2963 if (adapter->desired.rx_entries)
2964 adapter->req_rx_add_entries_per_subcrq =
2965 adapter->desired.rx_entries;
2966 else
2967 adapter->req_rx_add_entries_per_subcrq =
2968 adapter->max_rx_add_entries_per_subcrq;
2969
2970 if (adapter->desired.tx_queues)
2971 adapter->req_tx_queues =
2972 adapter->desired.tx_queues;
2973 else
2974 adapter->req_tx_queues =
2975 adapter->opt_tx_comp_sub_queues;
2976
2977 if (adapter->desired.rx_queues)
2978 adapter->req_rx_queues =
2979 adapter->desired.rx_queues;
2980 else
2981 adapter->req_rx_queues =
2982 adapter->opt_rx_comp_queues;
2983
2984 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2985 }
2986
2987 memset(&crq, 0, sizeof(crq));
2988 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2989 crq.request_capability.cmd = REQUEST_CAPABILITY;
2990
2991 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2992 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2993 atomic_inc(&adapter->running_cap_crqs);
2994 ibmvnic_send_crq(adapter, &crq);
2995
2996 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2997 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2998 atomic_inc(&adapter->running_cap_crqs);
2999 ibmvnic_send_crq(adapter, &crq);
3000
3001 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3002 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3003 atomic_inc(&adapter->running_cap_crqs);
3004 ibmvnic_send_crq(adapter, &crq);
3005
3006 crq.request_capability.capability =
3007 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3008 crq.request_capability.number =
3009 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3010 atomic_inc(&adapter->running_cap_crqs);
3011 ibmvnic_send_crq(adapter, &crq);
3012
3013 crq.request_capability.capability =
3014 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3015 crq.request_capability.number =
3016 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3017 atomic_inc(&adapter->running_cap_crqs);
3018 ibmvnic_send_crq(adapter, &crq);
3019
3020 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3021 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3022 atomic_inc(&adapter->running_cap_crqs);
3023 ibmvnic_send_crq(adapter, &crq);
3024
3025 if (adapter->netdev->flags & IFF_PROMISC) {
3026 if (adapter->promisc_supported) {
3027 crq.request_capability.capability =
3028 cpu_to_be16(PROMISC_REQUESTED);
3029 crq.request_capability.number = cpu_to_be64(1);
3030 atomic_inc(&adapter->running_cap_crqs);
3031 ibmvnic_send_crq(adapter, &crq);
3032 }
3033 } else {
3034 crq.request_capability.capability =
3035 cpu_to_be16(PROMISC_REQUESTED);
3036 crq.request_capability.number = cpu_to_be64(0);
3037 atomic_inc(&adapter->running_cap_crqs);
3038 ibmvnic_send_crq(adapter, &crq);
3039 }
3040}
3041
3042static int pending_scrq(struct ibmvnic_adapter *adapter,
3043 struct ibmvnic_sub_crq_queue *scrq)
3044{
3045 union sub_crq *entry = &scrq->msgs[scrq->cur];
3046
3047 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3048 return 1;
3049 else
3050 return 0;
3051}
3052
3053static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3054 struct ibmvnic_sub_crq_queue *scrq)
3055{
3056 union sub_crq *entry;
3057 unsigned long flags;
3058
3059 spin_lock_irqsave(&scrq->lock, flags);
3060 entry = &scrq->msgs[scrq->cur];
3061 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3062 if (++scrq->cur == scrq->size)
3063 scrq->cur = 0;
3064 } else {
3065 entry = NULL;
3066 }
3067 spin_unlock_irqrestore(&scrq->lock, flags);
3068
3069 return entry;
3070}
3071
3072static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3073{
3074 struct ibmvnic_crq_queue *queue = &adapter->crq;
3075 union ibmvnic_crq *crq;
3076
3077 crq = &queue->msgs[queue->cur];
3078 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3079 if (++queue->cur == queue->size)
3080 queue->cur = 0;
3081 } else {
3082 crq = NULL;
3083 }
3084
3085 return crq;
3086}
3087
3088static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3089 union sub_crq *sub_crq)
3090{
3091 unsigned int ua = adapter->vdev->unit_address;
3092 struct device *dev = &adapter->vdev->dev;
3093 u64 *u64_crq = (u64 *)sub_crq;
3094 int rc;
3095
3096 netdev_dbg(adapter->netdev,
3097 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3098 (unsigned long int)cpu_to_be64(remote_handle),
3099 (unsigned long int)cpu_to_be64(u64_crq[0]),
3100 (unsigned long int)cpu_to_be64(u64_crq[1]),
3101 (unsigned long int)cpu_to_be64(u64_crq[2]),
3102 (unsigned long int)cpu_to_be64(u64_crq[3]));
3103
3104 /* Make sure the hypervisor sees the complete request */
3105 mb();
3106
3107 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3108 cpu_to_be64(remote_handle),
3109 cpu_to_be64(u64_crq[0]),
3110 cpu_to_be64(u64_crq[1]),
3111 cpu_to_be64(u64_crq[2]),
3112 cpu_to_be64(u64_crq[3]));
3113
3114 if (rc) {
3115 if (rc == H_CLOSED)
3116 dev_warn(dev, "CRQ Queue closed\n");
3117 dev_err(dev, "Send error (rc=%d)\n", rc);
3118 }
3119
3120 return rc;
3121}
3122
3123static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3124 u64 remote_handle, u64 ioba, u64 num_entries)
3125{
3126 unsigned int ua = adapter->vdev->unit_address;
3127 struct device *dev = &adapter->vdev->dev;
3128 int rc;
3129
3130 /* Make sure the hypervisor sees the complete request */
3131 mb();
3132 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3133 cpu_to_be64(remote_handle),
3134 ioba, num_entries);
3135
3136 if (rc) {
3137 if (rc == H_CLOSED)
3138 dev_warn(dev, "CRQ Queue closed\n");
3139 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
3140 }
3141
3142 return rc;
3143}
3144
3145static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3146 union ibmvnic_crq *crq)
3147{
3148 unsigned int ua = adapter->vdev->unit_address;
3149 struct device *dev = &adapter->vdev->dev;
3150 u64 *u64_crq = (u64 *)crq;
3151 int rc;
3152
3153 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3154 (unsigned long int)cpu_to_be64(u64_crq[0]),
3155 (unsigned long int)cpu_to_be64(u64_crq[1]));
3156
3157 /* Make sure the hypervisor sees the complete request */
3158 mb();
3159
3160 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3161 cpu_to_be64(u64_crq[0]),
3162 cpu_to_be64(u64_crq[1]));
3163
3164 if (rc) {
3165 if (rc == H_CLOSED) {
3166 dev_warn(dev, "CRQ Queue closed\n");
3167 if (adapter->resetting)
3168 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3169 }
3170
3171 dev_warn(dev, "Send error (rc=%d)\n", rc);
3172 }
3173
3174 return rc;
3175}
3176
3177static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3178{
3179 union ibmvnic_crq crq;
3180
3181 memset(&crq, 0, sizeof(crq));
3182 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3183 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3184 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3185
3186 return ibmvnic_send_crq(adapter, &crq);
3187}
3188
3189static int send_version_xchg(struct ibmvnic_adapter *adapter)
3190{
3191 union ibmvnic_crq crq;
3192
3193 memset(&crq, 0, sizeof(crq));
3194 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3195 crq.version_exchange.cmd = VERSION_EXCHANGE;
3196 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3197
3198 return ibmvnic_send_crq(adapter, &crq);
3199}
3200
3201struct vnic_login_client_data {
3202 u8 type;
3203 __be16 len;
3204 char name[];
3205} __packed;
3206
3207static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3208{
3209 int len;
3210
3211 /* Calculate the amount of buffer space needed for the
3212 * vnic client data in the login buffer. There are four entries,
3213 * OS name, LPAR name, device name, and a null last entry.
3214 */
3215 len = 4 * sizeof(struct vnic_login_client_data);
3216 len += 6; /* "Linux" plus NULL */
3217 len += strlen(utsname()->nodename) + 1;
3218 len += strlen(adapter->netdev->name) + 1;
3219
3220 return len;
3221}
3222
3223static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3224 struct vnic_login_client_data *vlcd)
3225{
3226 const char *os_name = "Linux";
3227 int len;
3228
3229 /* Type 1 - LPAR OS */
3230 vlcd->type = 1;
3231 len = strlen(os_name) + 1;
3232 vlcd->len = cpu_to_be16(len);
3233 strncpy(vlcd->name, os_name, len);
3234 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3235
3236 /* Type 2 - LPAR name */
3237 vlcd->type = 2;
3238 len = strlen(utsname()->nodename) + 1;
3239 vlcd->len = cpu_to_be16(len);
3240 strncpy(vlcd->name, utsname()->nodename, len);
3241 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3242
3243 /* Type 3 - device name */
3244 vlcd->type = 3;
3245 len = strlen(adapter->netdev->name) + 1;
3246 vlcd->len = cpu_to_be16(len);
3247 strncpy(vlcd->name, adapter->netdev->name, len);
3248}
3249
3250static int send_login(struct ibmvnic_adapter *adapter)
3251{
3252 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3253 struct ibmvnic_login_buffer *login_buffer;
3254 struct device *dev = &adapter->vdev->dev;
3255 dma_addr_t rsp_buffer_token;
3256 dma_addr_t buffer_token;
3257 size_t rsp_buffer_size;
3258 union ibmvnic_crq crq;
3259 size_t buffer_size;
3260 __be64 *tx_list_p;
3261 __be64 *rx_list_p;
3262 int client_data_len;
3263 struct vnic_login_client_data *vlcd;
3264 int i;
3265
3266 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3267 netdev_err(adapter->netdev,
3268 "RX or TX queues are not allocated, device login failed\n");
3269 return -1;
3270 }
3271
3272 release_login_rsp_buffer(adapter);
3273 client_data_len = vnic_client_data_len(adapter);
3274
3275 buffer_size =
3276 sizeof(struct ibmvnic_login_buffer) +
3277 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3278 client_data_len;
3279
3280 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3281 if (!login_buffer)
3282 goto buf_alloc_failed;
3283
3284 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3285 DMA_TO_DEVICE);
3286 if (dma_mapping_error(dev, buffer_token)) {
3287 dev_err(dev, "Couldn't map login buffer\n");
3288 goto buf_map_failed;
3289 }
3290
3291 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3292 sizeof(u64) * adapter->req_tx_queues +
3293 sizeof(u64) * adapter->req_rx_queues +
3294 sizeof(u64) * adapter->req_rx_queues +
3295 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3296
3297 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3298 if (!login_rsp_buffer)
3299 goto buf_rsp_alloc_failed;
3300
3301 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3302 rsp_buffer_size, DMA_FROM_DEVICE);
3303 if (dma_mapping_error(dev, rsp_buffer_token)) {
3304 dev_err(dev, "Couldn't map login rsp buffer\n");
3305 goto buf_rsp_map_failed;
3306 }
3307
3308 adapter->login_buf = login_buffer;
3309 adapter->login_buf_token = buffer_token;
3310 adapter->login_buf_sz = buffer_size;
3311 adapter->login_rsp_buf = login_rsp_buffer;
3312 adapter->login_rsp_buf_token = rsp_buffer_token;
3313 adapter->login_rsp_buf_sz = rsp_buffer_size;
3314
3315 login_buffer->len = cpu_to_be32(buffer_size);
3316 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3317 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3318 login_buffer->off_txcomp_subcrqs =
3319 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3320 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3321 login_buffer->off_rxcomp_subcrqs =
3322 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3323 sizeof(u64) * adapter->req_tx_queues);
3324 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3325 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3326
3327 tx_list_p = (__be64 *)((char *)login_buffer +
3328 sizeof(struct ibmvnic_login_buffer));
3329 rx_list_p = (__be64 *)((char *)login_buffer +
3330 sizeof(struct ibmvnic_login_buffer) +
3331 sizeof(u64) * adapter->req_tx_queues);
3332
3333 for (i = 0; i < adapter->req_tx_queues; i++) {
3334 if (adapter->tx_scrq[i]) {
3335 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3336 crq_num);
3337 }
3338 }
3339
3340 for (i = 0; i < adapter->req_rx_queues; i++) {
3341 if (adapter->rx_scrq[i]) {
3342 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3343 crq_num);
3344 }
3345 }
3346
3347 /* Insert vNIC login client data */
3348 vlcd = (struct vnic_login_client_data *)
3349 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3350 login_buffer->client_data_offset =
3351 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3352 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3353
3354 vnic_add_client_data(adapter, vlcd);
3355
3356 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3357 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3358 netdev_dbg(adapter->netdev, "%016lx\n",
3359 ((unsigned long int *)(adapter->login_buf))[i]);
3360 }
3361
3362 memset(&crq, 0, sizeof(crq));
3363 crq.login.first = IBMVNIC_CRQ_CMD;
3364 crq.login.cmd = LOGIN;
3365 crq.login.ioba = cpu_to_be32(buffer_token);
3366 crq.login.len = cpu_to_be32(buffer_size);
3367 ibmvnic_send_crq(adapter, &crq);
3368
3369 return 0;
3370
3371buf_rsp_map_failed:
3372 kfree(login_rsp_buffer);
3373buf_rsp_alloc_failed:
3374 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3375buf_map_failed:
3376 kfree(login_buffer);
3377buf_alloc_failed:
3378 return -1;
3379}
3380
3381static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3382 u32 len, u8 map_id)
3383{
3384 union ibmvnic_crq crq;
3385
3386 memset(&crq, 0, sizeof(crq));
3387 crq.request_map.first = IBMVNIC_CRQ_CMD;
3388 crq.request_map.cmd = REQUEST_MAP;
3389 crq.request_map.map_id = map_id;
3390 crq.request_map.ioba = cpu_to_be32(addr);
3391 crq.request_map.len = cpu_to_be32(len);
3392 ibmvnic_send_crq(adapter, &crq);
3393}
3394
3395static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3396{
3397 union ibmvnic_crq crq;
3398
3399 memset(&crq, 0, sizeof(crq));
3400 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3401 crq.request_unmap.cmd = REQUEST_UNMAP;
3402 crq.request_unmap.map_id = map_id;
3403 ibmvnic_send_crq(adapter, &crq);
3404}
3405
3406static void send_map_query(struct ibmvnic_adapter *adapter)
3407{
3408 union ibmvnic_crq crq;
3409
3410 memset(&crq, 0, sizeof(crq));
3411 crq.query_map.first = IBMVNIC_CRQ_CMD;
3412 crq.query_map.cmd = QUERY_MAP;
3413 ibmvnic_send_crq(adapter, &crq);
3414}
3415
3416/* Send a series of CRQs requesting various capabilities of the VNIC server */
3417static void send_cap_queries(struct ibmvnic_adapter *adapter)
3418{
3419 union ibmvnic_crq crq;
3420
3421 atomic_set(&adapter->running_cap_crqs, 0);
3422 memset(&crq, 0, sizeof(crq));
3423 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3424 crq.query_capability.cmd = QUERY_CAPABILITY;
3425
3426 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3427 atomic_inc(&adapter->running_cap_crqs);
3428 ibmvnic_send_crq(adapter, &crq);
3429
3430 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3431 atomic_inc(&adapter->running_cap_crqs);
3432 ibmvnic_send_crq(adapter, &crq);
3433
3434 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3435 atomic_inc(&adapter->running_cap_crqs);
3436 ibmvnic_send_crq(adapter, &crq);
3437
3438 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3439 atomic_inc(&adapter->running_cap_crqs);
3440 ibmvnic_send_crq(adapter, &crq);
3441
3442 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3443 atomic_inc(&adapter->running_cap_crqs);
3444 ibmvnic_send_crq(adapter, &crq);
3445
3446 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3447 atomic_inc(&adapter->running_cap_crqs);
3448 ibmvnic_send_crq(adapter, &crq);
3449
3450 crq.query_capability.capability =
3451 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3452 atomic_inc(&adapter->running_cap_crqs);
3453 ibmvnic_send_crq(adapter, &crq);
3454
3455 crq.query_capability.capability =
3456 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3457 atomic_inc(&adapter->running_cap_crqs);
3458 ibmvnic_send_crq(adapter, &crq);
3459
3460 crq.query_capability.capability =
3461 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3462 atomic_inc(&adapter->running_cap_crqs);
3463 ibmvnic_send_crq(adapter, &crq);
3464
3465 crq.query_capability.capability =
3466 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3467 atomic_inc(&adapter->running_cap_crqs);
3468 ibmvnic_send_crq(adapter, &crq);
3469
3470 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3471 atomic_inc(&adapter->running_cap_crqs);
3472 ibmvnic_send_crq(adapter, &crq);
3473
3474 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3475 atomic_inc(&adapter->running_cap_crqs);
3476 ibmvnic_send_crq(adapter, &crq);
3477
3478 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3479 atomic_inc(&adapter->running_cap_crqs);
3480 ibmvnic_send_crq(adapter, &crq);
3481
3482 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3483 atomic_inc(&adapter->running_cap_crqs);
3484 ibmvnic_send_crq(adapter, &crq);
3485
3486 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3487 atomic_inc(&adapter->running_cap_crqs);
3488 ibmvnic_send_crq(adapter, &crq);
3489
3490 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3491 atomic_inc(&adapter->running_cap_crqs);
3492 ibmvnic_send_crq(adapter, &crq);
3493
3494 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3495 atomic_inc(&adapter->running_cap_crqs);
3496 ibmvnic_send_crq(adapter, &crq);
3497
3498 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3499 atomic_inc(&adapter->running_cap_crqs);
3500 ibmvnic_send_crq(adapter, &crq);
3501
3502 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3503 atomic_inc(&adapter->running_cap_crqs);
3504 ibmvnic_send_crq(adapter, &crq);
3505
3506 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3507 atomic_inc(&adapter->running_cap_crqs);
3508 ibmvnic_send_crq(adapter, &crq);
3509
3510 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3511 atomic_inc(&adapter->running_cap_crqs);
3512 ibmvnic_send_crq(adapter, &crq);
3513
3514 crq.query_capability.capability =
3515 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3516 atomic_inc(&adapter->running_cap_crqs);
3517 ibmvnic_send_crq(adapter, &crq);
3518
3519 crq.query_capability.capability =
3520 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3521 atomic_inc(&adapter->running_cap_crqs);
3522 ibmvnic_send_crq(adapter, &crq);
3523
3524 crq.query_capability.capability =
3525 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3526 atomic_inc(&adapter->running_cap_crqs);
3527 ibmvnic_send_crq(adapter, &crq);
3528
3529 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3530 atomic_inc(&adapter->running_cap_crqs);
3531 ibmvnic_send_crq(adapter, &crq);
3532}
3533
3534static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3535 struct ibmvnic_adapter *adapter)
3536{
3537 struct device *dev = &adapter->vdev->dev;
3538
3539 if (crq->get_vpd_size_rsp.rc.code) {
3540 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3541 crq->get_vpd_size_rsp.rc.code);
3542 complete(&adapter->fw_done);
3543 return;
3544 }
3545
3546 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3547 complete(&adapter->fw_done);
3548}
3549
3550static void handle_vpd_rsp(union ibmvnic_crq *crq,
3551 struct ibmvnic_adapter *adapter)
3552{
3553 struct device *dev = &adapter->vdev->dev;
3554 unsigned char *substr = NULL;
3555 u8 fw_level_len = 0;
3556
3557 memset(adapter->fw_version, 0, 32);
3558
3559 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3560 DMA_FROM_DEVICE);
3561
3562 if (crq->get_vpd_rsp.rc.code) {
3563 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3564 crq->get_vpd_rsp.rc.code);
3565 goto complete;
3566 }
3567
3568 /* get the position of the firmware version info
3569 * located after the ASCII 'RM' substring in the buffer
3570 */
3571 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3572 if (!substr) {
3573 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3574 goto complete;
3575 }
3576
3577 /* get length of firmware level ASCII substring */
3578 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3579 fw_level_len = *(substr + 2);
3580 } else {
3581 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3582 goto complete;
3583 }
3584
3585 /* copy firmware version string from vpd into adapter */
3586 if ((substr + 3 + fw_level_len) <
3587 (adapter->vpd->buff + adapter->vpd->len)) {
3588 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3589 } else {
3590 dev_info(dev, "FW substr extrapolated VPD buff\n");
3591 }
3592
3593complete:
3594 if (adapter->fw_version[0] == '\0')
3595 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3596 complete(&adapter->fw_done);
3597}
3598
3599static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3600{
3601 struct device *dev = &adapter->vdev->dev;
3602 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3603 union ibmvnic_crq crq;
3604 int i;
3605
3606 dma_unmap_single(dev, adapter->ip_offload_tok,
3607 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3608
3609 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3610 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3611 netdev_dbg(adapter->netdev, "%016lx\n",
3612 ((unsigned long int *)(buf))[i]);
3613
3614 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3615 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3616 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3617 buf->tcp_ipv4_chksum);
3618 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3619 buf->tcp_ipv6_chksum);
3620 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3621 buf->udp_ipv4_chksum);
3622 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3623 buf->udp_ipv6_chksum);
3624 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3625 buf->large_tx_ipv4);
3626 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3627 buf->large_tx_ipv6);
3628 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3629 buf->large_rx_ipv4);
3630 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3631 buf->large_rx_ipv6);
3632 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3633 buf->max_ipv4_header_size);
3634 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3635 buf->max_ipv6_header_size);
3636 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3637 buf->max_tcp_header_size);
3638 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3639 buf->max_udp_header_size);
3640 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3641 buf->max_large_tx_size);
3642 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3643 buf->max_large_rx_size);
3644 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3645 buf->ipv6_extension_header);
3646 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3647 buf->tcp_pseudosum_req);
3648 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3649 buf->num_ipv6_ext_headers);
3650 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3651 buf->off_ipv6_ext_headers);
3652
3653 adapter->ip_offload_ctrl_tok =
3654 dma_map_single(dev, &adapter->ip_offload_ctrl,
3655 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3656
3657 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3658 dev_err(dev, "Couldn't map ip offload control buffer\n");
3659 return;
3660 }
3661
3662 adapter->ip_offload_ctrl.len =
3663 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3664 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3665 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3666 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3667 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3668 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3669 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3670 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3671 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3672 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3673
3674 /* large_rx disabled for now, additional features needed */
3675 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3676 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3677
3678 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3679
3680 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3681 adapter->netdev->features |= NETIF_F_IP_CSUM;
3682
3683 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3684 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3685
3686 if ((adapter->netdev->features &
3687 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3688 adapter->netdev->features |= NETIF_F_RXCSUM;
3689
3690 if (buf->large_tx_ipv4)
3691 adapter->netdev->features |= NETIF_F_TSO;
3692 if (buf->large_tx_ipv6)
3693 adapter->netdev->features |= NETIF_F_TSO6;
3694
3695 adapter->netdev->hw_features |= adapter->netdev->features;
3696
3697 memset(&crq, 0, sizeof(crq));
3698 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3699 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3700 crq.control_ip_offload.len =
3701 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3702 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3703 ibmvnic_send_crq(adapter, &crq);
3704}
3705
3706static void handle_error_info_rsp(union ibmvnic_crq *crq,
3707 struct ibmvnic_adapter *adapter)
3708{
3709 struct device *dev = &adapter->vdev->dev;
3710 struct ibmvnic_error_buff *error_buff, *tmp;
3711 unsigned long flags;
3712 bool found = false;
3713 int i;
3714
3715 if (!crq->request_error_rsp.rc.code) {
3716 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3717 crq->request_error_rsp.rc.code);
3718 return;
3719 }
3720
3721 spin_lock_irqsave(&adapter->error_list_lock, flags);
3722 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3723 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3724 found = true;
3725 list_del(&error_buff->list);
3726 break;
3727 }
3728 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3729
3730 if (!found) {
3731 dev_err(dev, "Couldn't find error id %x\n",
3732 be32_to_cpu(crq->request_error_rsp.error_id));
3733 return;
3734 }
3735
3736 dev_err(dev, "Detailed info for error id %x:",
3737 be32_to_cpu(crq->request_error_rsp.error_id));
3738
3739 for (i = 0; i < error_buff->len; i++) {
3740 pr_cont("%02x", (int)error_buff->buff[i]);
3741 if (i % 8 == 7)
3742 pr_cont(" ");
3743 }
3744 pr_cont("\n");
3745
3746 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3747 DMA_FROM_DEVICE);
3748 kfree(error_buff->buff);
3749 kfree(error_buff);
3750}
3751
3752static void request_error_information(struct ibmvnic_adapter *adapter,
3753 union ibmvnic_crq *err_crq)
3754{
3755 struct device *dev = &adapter->vdev->dev;
3756 struct net_device *netdev = adapter->netdev;
3757 struct ibmvnic_error_buff *error_buff;
3758 unsigned long timeout = msecs_to_jiffies(30000);
3759 union ibmvnic_crq crq;
3760 unsigned long flags;
3761 int rc, detail_len;
3762
3763 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3764 if (!error_buff)
3765 return;
3766
3767 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3768 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3769 if (!error_buff->buff) {
3770 kfree(error_buff);
3771 return;
3772 }
3773
3774 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3775 DMA_FROM_DEVICE);
3776 if (dma_mapping_error(dev, error_buff->dma)) {
3777 netdev_err(netdev, "Couldn't map error buffer\n");
3778 kfree(error_buff->buff);
3779 kfree(error_buff);
3780 return;
3781 }
3782
3783 error_buff->len = detail_len;
3784 error_buff->error_id = err_crq->error_indication.error_id;
3785
3786 spin_lock_irqsave(&adapter->error_list_lock, flags);
3787 list_add_tail(&error_buff->list, &adapter->errors);
3788 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3789
3790 memset(&crq, 0, sizeof(crq));
3791 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3792 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3793 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3794 crq.request_error_info.len = cpu_to_be32(detail_len);
3795 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3796
3797 rc = ibmvnic_send_crq(adapter, &crq);
3798 if (rc) {
3799 netdev_err(netdev, "failed to request error information\n");
3800 goto err_info_fail;
3801 }
3802
3803 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3804 netdev_err(netdev, "timeout waiting for error information\n");
3805 goto err_info_fail;
3806 }
3807
3808 return;
3809
3810err_info_fail:
3811 spin_lock_irqsave(&adapter->error_list_lock, flags);
3812 list_del(&error_buff->list);
3813 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3814
3815 kfree(error_buff->buff);
3816 kfree(error_buff);
3817}
3818
3819static void handle_error_indication(union ibmvnic_crq *crq,
3820 struct ibmvnic_adapter *adapter)
3821{
3822 struct device *dev = &adapter->vdev->dev;
3823
3824 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3825 crq->error_indication.flags
3826 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3827 be32_to_cpu(crq->error_indication.error_id),
3828 be16_to_cpu(crq->error_indication.error_cause));
3829
3830 if (be32_to_cpu(crq->error_indication.error_id))
3831 request_error_information(adapter, crq);
3832
3833 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3834 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3835 else
3836 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3837}
3838
3839static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3840 struct ibmvnic_adapter *adapter)
3841{
3842 struct net_device *netdev = adapter->netdev;
3843 struct device *dev = &adapter->vdev->dev;
3844 long rc;
3845
3846 rc = crq->change_mac_addr_rsp.rc.code;
3847 if (rc) {
3848 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3849 goto out;
3850 }
3851 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3852 ETH_ALEN);
3853out:
3854 complete(&adapter->fw_done);
3855 return rc;
3856}
3857
3858static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3859 struct ibmvnic_adapter *adapter)
3860{
3861 struct device *dev = &adapter->vdev->dev;
3862 u64 *req_value;
3863 char *name;
3864
3865 atomic_dec(&adapter->running_cap_crqs);
3866 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3867 case REQ_TX_QUEUES:
3868 req_value = &adapter->req_tx_queues;
3869 name = "tx";
3870 break;
3871 case REQ_RX_QUEUES:
3872 req_value = &adapter->req_rx_queues;
3873 name = "rx";
3874 break;
3875 case REQ_RX_ADD_QUEUES:
3876 req_value = &adapter->req_rx_add_queues;
3877 name = "rx_add";
3878 break;
3879 case REQ_TX_ENTRIES_PER_SUBCRQ:
3880 req_value = &adapter->req_tx_entries_per_subcrq;
3881 name = "tx_entries_per_subcrq";
3882 break;
3883 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3884 req_value = &adapter->req_rx_add_entries_per_subcrq;
3885 name = "rx_add_entries_per_subcrq";
3886 break;
3887 case REQ_MTU:
3888 req_value = &adapter->req_mtu;
3889 name = "mtu";
3890 break;
3891 case PROMISC_REQUESTED:
3892 req_value = &adapter->promisc;
3893 name = "promisc";
3894 break;
3895 default:
3896 dev_err(dev, "Got invalid cap request rsp %d\n",
3897 crq->request_capability.capability);
3898 return;
3899 }
3900
3901 switch (crq->request_capability_rsp.rc.code) {
3902 case SUCCESS:
3903 break;
3904 case PARTIALSUCCESS:
3905 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3906 *req_value,
3907 (long int)be64_to_cpu(crq->request_capability_rsp.
3908 number), name);
3909
3910 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3911 REQ_MTU) {
3912 pr_err("mtu of %llu is not supported. Reverting.\n",
3913 *req_value);
3914 *req_value = adapter->fallback.mtu;
3915 } else {
3916 *req_value =
3917 be64_to_cpu(crq->request_capability_rsp.number);
3918 }
3919
3920 ibmvnic_send_req_caps(adapter, 1);
3921 return;
3922 default:
3923 dev_err(dev, "Error %d in request cap rsp\n",
3924 crq->request_capability_rsp.rc.code);
3925 return;
3926 }
3927
3928 /* Done receiving requested capabilities, query IP offload support */
3929 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3930 union ibmvnic_crq newcrq;
3931 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3932 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3933 &adapter->ip_offload_buf;
3934
3935 adapter->wait_capability = false;
3936 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3937 buf_sz,
3938 DMA_FROM_DEVICE);
3939
3940 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3941 if (!firmware_has_feature(FW_FEATURE_CMO))
3942 dev_err(dev, "Couldn't map offload buffer\n");
3943 return;
3944 }
3945
3946 memset(&newcrq, 0, sizeof(newcrq));
3947 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3948 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3949 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3950 newcrq.query_ip_offload.ioba =
3951 cpu_to_be32(adapter->ip_offload_tok);
3952
3953 ibmvnic_send_crq(adapter, &newcrq);
3954 }
3955}
3956
3957static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3958 struct ibmvnic_adapter *adapter)
3959{
3960 struct device *dev = &adapter->vdev->dev;
3961 struct net_device *netdev = adapter->netdev;
3962 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3963 struct ibmvnic_login_buffer *login = adapter->login_buf;
3964 int i;
3965
3966 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3967 DMA_TO_DEVICE);
3968 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3969 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
3970
3971 /* If the number of queues requested can't be allocated by the
3972 * server, the login response will return with code 1. We will need
3973 * to resend the login buffer with fewer queues requested.
3974 */
3975 if (login_rsp_crq->generic.rc.code) {
3976 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
3977 complete(&adapter->init_done);
3978 return 0;
3979 }
3980
3981 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3982
3983 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3984 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3985 netdev_dbg(adapter->netdev, "%016lx\n",
3986 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3987 }
3988
3989 /* Sanity checks */
3990 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3991 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3992 adapter->req_rx_add_queues !=
3993 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3994 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3995 ibmvnic_remove(adapter->vdev);
3996 return -EIO;
3997 }
3998 release_login_buffer(adapter);
3999 complete(&adapter->init_done);
4000
4001 return 0;
4002}
4003
4004static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4005 struct ibmvnic_adapter *adapter)
4006{
4007 struct device *dev = &adapter->vdev->dev;
4008 long rc;
4009
4010 rc = crq->request_unmap_rsp.rc.code;
4011 if (rc)
4012 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4013}
4014
4015static void handle_query_map_rsp(union ibmvnic_crq *crq,
4016 struct ibmvnic_adapter *adapter)
4017{
4018 struct net_device *netdev = adapter->netdev;
4019 struct device *dev = &adapter->vdev->dev;
4020 long rc;
4021
4022 rc = crq->query_map_rsp.rc.code;
4023 if (rc) {
4024 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4025 return;
4026 }
4027 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4028 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4029 crq->query_map_rsp.free_pages);
4030}
4031
4032static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4033 struct ibmvnic_adapter *adapter)
4034{
4035 struct net_device *netdev = adapter->netdev;
4036 struct device *dev = &adapter->vdev->dev;
4037 long rc;
4038
4039 atomic_dec(&adapter->running_cap_crqs);
4040 netdev_dbg(netdev, "Outstanding queries: %d\n",
4041 atomic_read(&adapter->running_cap_crqs));
4042 rc = crq->query_capability.rc.code;
4043 if (rc) {
4044 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4045 goto out;
4046 }
4047
4048 switch (be16_to_cpu(crq->query_capability.capability)) {
4049 case MIN_TX_QUEUES:
4050 adapter->min_tx_queues =
4051 be64_to_cpu(crq->query_capability.number);
4052 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4053 adapter->min_tx_queues);
4054 break;
4055 case MIN_RX_QUEUES:
4056 adapter->min_rx_queues =
4057 be64_to_cpu(crq->query_capability.number);
4058 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4059 adapter->min_rx_queues);
4060 break;
4061 case MIN_RX_ADD_QUEUES:
4062 adapter->min_rx_add_queues =
4063 be64_to_cpu(crq->query_capability.number);
4064 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4065 adapter->min_rx_add_queues);
4066 break;
4067 case MAX_TX_QUEUES:
4068 adapter->max_tx_queues =
4069 be64_to_cpu(crq->query_capability.number);
4070 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4071 adapter->max_tx_queues);
4072 break;
4073 case MAX_RX_QUEUES:
4074 adapter->max_rx_queues =
4075 be64_to_cpu(crq->query_capability.number);
4076 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4077 adapter->max_rx_queues);
4078 break;
4079 case MAX_RX_ADD_QUEUES:
4080 adapter->max_rx_add_queues =
4081 be64_to_cpu(crq->query_capability.number);
4082 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4083 adapter->max_rx_add_queues);
4084 break;
4085 case MIN_TX_ENTRIES_PER_SUBCRQ:
4086 adapter->min_tx_entries_per_subcrq =
4087 be64_to_cpu(crq->query_capability.number);
4088 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4089 adapter->min_tx_entries_per_subcrq);
4090 break;
4091 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4092 adapter->min_rx_add_entries_per_subcrq =
4093 be64_to_cpu(crq->query_capability.number);
4094 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4095 adapter->min_rx_add_entries_per_subcrq);
4096 break;
4097 case MAX_TX_ENTRIES_PER_SUBCRQ:
4098 adapter->max_tx_entries_per_subcrq =
4099 be64_to_cpu(crq->query_capability.number);
4100 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4101 adapter->max_tx_entries_per_subcrq);
4102 break;
4103 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4104 adapter->max_rx_add_entries_per_subcrq =
4105 be64_to_cpu(crq->query_capability.number);
4106 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4107 adapter->max_rx_add_entries_per_subcrq);
4108 break;
4109 case TCP_IP_OFFLOAD:
4110 adapter->tcp_ip_offload =
4111 be64_to_cpu(crq->query_capability.number);
4112 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4113 adapter->tcp_ip_offload);
4114 break;
4115 case PROMISC_SUPPORTED:
4116 adapter->promisc_supported =
4117 be64_to_cpu(crq->query_capability.number);
4118 netdev_dbg(netdev, "promisc_supported = %lld\n",
4119 adapter->promisc_supported);
4120 break;
4121 case MIN_MTU:
4122 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4123 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4124 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4125 break;
4126 case MAX_MTU:
4127 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4128 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4129 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4130 break;
4131 case MAX_MULTICAST_FILTERS:
4132 adapter->max_multicast_filters =
4133 be64_to_cpu(crq->query_capability.number);
4134 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4135 adapter->max_multicast_filters);
4136 break;
4137 case VLAN_HEADER_INSERTION:
4138 adapter->vlan_header_insertion =
4139 be64_to_cpu(crq->query_capability.number);
4140 if (adapter->vlan_header_insertion)
4141 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4142 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4143 adapter->vlan_header_insertion);
4144 break;
4145 case RX_VLAN_HEADER_INSERTION:
4146 adapter->rx_vlan_header_insertion =
4147 be64_to_cpu(crq->query_capability.number);
4148 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4149 adapter->rx_vlan_header_insertion);
4150 break;
4151 case MAX_TX_SG_ENTRIES:
4152 adapter->max_tx_sg_entries =
4153 be64_to_cpu(crq->query_capability.number);
4154 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4155 adapter->max_tx_sg_entries);
4156 break;
4157 case RX_SG_SUPPORTED:
4158 adapter->rx_sg_supported =
4159 be64_to_cpu(crq->query_capability.number);
4160 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4161 adapter->rx_sg_supported);
4162 break;
4163 case OPT_TX_COMP_SUB_QUEUES:
4164 adapter->opt_tx_comp_sub_queues =
4165 be64_to_cpu(crq->query_capability.number);
4166 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4167 adapter->opt_tx_comp_sub_queues);
4168 break;
4169 case OPT_RX_COMP_QUEUES:
4170 adapter->opt_rx_comp_queues =
4171 be64_to_cpu(crq->query_capability.number);
4172 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4173 adapter->opt_rx_comp_queues);
4174 break;
4175 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4176 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4177 be64_to_cpu(crq->query_capability.number);
4178 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4179 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4180 break;
4181 case OPT_TX_ENTRIES_PER_SUBCRQ:
4182 adapter->opt_tx_entries_per_subcrq =
4183 be64_to_cpu(crq->query_capability.number);
4184 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4185 adapter->opt_tx_entries_per_subcrq);
4186 break;
4187 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4188 adapter->opt_rxba_entries_per_subcrq =
4189 be64_to_cpu(crq->query_capability.number);
4190 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4191 adapter->opt_rxba_entries_per_subcrq);
4192 break;
4193 case TX_RX_DESC_REQ:
4194 adapter->tx_rx_desc_req = crq->query_capability.number;
4195 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4196 adapter->tx_rx_desc_req);
4197 break;
4198
4199 default:
4200 netdev_err(netdev, "Got invalid cap rsp %d\n",
4201 crq->query_capability.capability);
4202 }
4203
4204out:
4205 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4206 adapter->wait_capability = false;
4207 ibmvnic_send_req_caps(adapter, 0);
4208 }
4209}
4210
4211static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4212 struct ibmvnic_adapter *adapter)
4213{
4214 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4215 struct net_device *netdev = adapter->netdev;
4216 struct device *dev = &adapter->vdev->dev;
4217 u64 *u64_crq = (u64 *)crq;
4218 long rc;
4219
4220 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4221 (unsigned long int)cpu_to_be64(u64_crq[0]),
4222 (unsigned long int)cpu_to_be64(u64_crq[1]));
4223 switch (gen_crq->first) {
4224 case IBMVNIC_CRQ_INIT_RSP:
4225 switch (gen_crq->cmd) {
4226 case IBMVNIC_CRQ_INIT:
4227 dev_info(dev, "Partner initialized\n");
4228 adapter->from_passive_init = true;
4229 adapter->failover_pending = false;
4230 complete(&adapter->init_done);
4231 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4232 break;
4233 case IBMVNIC_CRQ_INIT_COMPLETE:
4234 dev_info(dev, "Partner initialization complete\n");
4235 send_version_xchg(adapter);
4236 break;
4237 default:
4238 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4239 }
4240 return;
4241 case IBMVNIC_CRQ_XPORT_EVENT:
4242 netif_carrier_off(netdev);
4243 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4244 dev_info(dev, "Migrated, re-enabling adapter\n");
4245 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4246 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4247 dev_info(dev, "Backing device failover detected\n");
4248 adapter->failover_pending = true;
4249 } else {
4250 /* The adapter lost the connection */
4251 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4252 gen_crq->cmd);
4253 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4254 }
4255 return;
4256 case IBMVNIC_CRQ_CMD_RSP:
4257 break;
4258 default:
4259 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4260 gen_crq->first);
4261 return;
4262 }
4263
4264 switch (gen_crq->cmd) {
4265 case VERSION_EXCHANGE_RSP:
4266 rc = crq->version_exchange_rsp.rc.code;
4267 if (rc) {
4268 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4269 break;
4270 }
4271 dev_info(dev, "Partner protocol version is %d\n",
4272 crq->version_exchange_rsp.version);
4273 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4274 ibmvnic_version)
4275 ibmvnic_version =
4276 be16_to_cpu(crq->version_exchange_rsp.version);
4277 send_cap_queries(adapter);
4278 break;
4279 case QUERY_CAPABILITY_RSP:
4280 handle_query_cap_rsp(crq, adapter);
4281 break;
4282 case QUERY_MAP_RSP:
4283 handle_query_map_rsp(crq, adapter);
4284 break;
4285 case REQUEST_MAP_RSP:
4286 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4287 complete(&adapter->fw_done);
4288 break;
4289 case REQUEST_UNMAP_RSP:
4290 handle_request_unmap_rsp(crq, adapter);
4291 break;
4292 case REQUEST_CAPABILITY_RSP:
4293 handle_request_cap_rsp(crq, adapter);
4294 break;
4295 case LOGIN_RSP:
4296 netdev_dbg(netdev, "Got Login Response\n");
4297 handle_login_rsp(crq, adapter);
4298 break;
4299 case LOGICAL_LINK_STATE_RSP:
4300 netdev_dbg(netdev,
4301 "Got Logical Link State Response, state: %d rc: %d\n",
4302 crq->logical_link_state_rsp.link_state,
4303 crq->logical_link_state_rsp.rc.code);
4304 adapter->logical_link_state =
4305 crq->logical_link_state_rsp.link_state;
4306 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4307 complete(&adapter->init_done);
4308 break;
4309 case LINK_STATE_INDICATION:
4310 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4311 adapter->phys_link_state =
4312 crq->link_state_indication.phys_link_state;
4313 adapter->logical_link_state =
4314 crq->link_state_indication.logical_link_state;
4315 break;
4316 case CHANGE_MAC_ADDR_RSP:
4317 netdev_dbg(netdev, "Got MAC address change Response\n");
4318 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4319 break;
4320 case ERROR_INDICATION:
4321 netdev_dbg(netdev, "Got Error Indication\n");
4322 handle_error_indication(crq, adapter);
4323 break;
4324 case REQUEST_ERROR_RSP:
4325 netdev_dbg(netdev, "Got Error Detail Response\n");
4326 handle_error_info_rsp(crq, adapter);
4327 break;
4328 case REQUEST_STATISTICS_RSP:
4329 netdev_dbg(netdev, "Got Statistics Response\n");
4330 complete(&adapter->stats_done);
4331 break;
4332 case QUERY_IP_OFFLOAD_RSP:
4333 netdev_dbg(netdev, "Got Query IP offload Response\n");
4334 handle_query_ip_offload_rsp(adapter);
4335 break;
4336 case MULTICAST_CTRL_RSP:
4337 netdev_dbg(netdev, "Got multicast control Response\n");
4338 break;
4339 case CONTROL_IP_OFFLOAD_RSP:
4340 netdev_dbg(netdev, "Got Control IP offload Response\n");
4341 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4342 sizeof(adapter->ip_offload_ctrl),
4343 DMA_TO_DEVICE);
4344 complete(&adapter->init_done);
4345 break;
4346 case COLLECT_FW_TRACE_RSP:
4347 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4348 complete(&adapter->fw_done);
4349 break;
4350 case GET_VPD_SIZE_RSP:
4351 handle_vpd_size_rsp(crq, adapter);
4352 break;
4353 case GET_VPD_RSP:
4354 handle_vpd_rsp(crq, adapter);
4355 break;
4356 default:
4357 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4358 gen_crq->cmd);
4359 }
4360}
4361
4362static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4363{
4364 struct ibmvnic_adapter *adapter = instance;
4365
4366 tasklet_schedule(&adapter->tasklet);
4367 return IRQ_HANDLED;
4368}
4369
4370static void ibmvnic_tasklet(void *data)
4371{
4372 struct ibmvnic_adapter *adapter = data;
4373 struct ibmvnic_crq_queue *queue = &adapter->crq;
4374 union ibmvnic_crq *crq;
4375 unsigned long flags;
4376 bool done = false;
4377
4378 spin_lock_irqsave(&queue->lock, flags);
4379 while (!done) {
4380 /* Pull all the valid messages off the CRQ */
4381 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4382 ibmvnic_handle_crq(crq, adapter);
4383 crq->generic.first = 0;
4384 }
4385
4386 /* remain in tasklet until all
4387 * capabilities responses are received
4388 */
4389 if (!adapter->wait_capability)
4390 done = true;
4391 }
4392 /* if capabilities CRQ's were sent in this tasklet, the following
4393 * tasklet must wait until all responses are received
4394 */
4395 if (atomic_read(&adapter->running_cap_crqs) != 0)
4396 adapter->wait_capability = true;
4397 spin_unlock_irqrestore(&queue->lock, flags);
4398}
4399
4400static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4401{
4402 struct vio_dev *vdev = adapter->vdev;
4403 int rc;
4404
4405 do {
4406 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4407 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4408
4409 if (rc)
4410 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4411
4412 return rc;
4413}
4414
4415static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4416{
4417 struct ibmvnic_crq_queue *crq = &adapter->crq;
4418 struct device *dev = &adapter->vdev->dev;
4419 struct vio_dev *vdev = adapter->vdev;
4420 int rc;
4421
4422 /* Close the CRQ */
4423 do {
4424 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4425 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4426
4427 /* Clean out the queue */
4428 memset(crq->msgs, 0, PAGE_SIZE);
4429 crq->cur = 0;
4430
4431 /* And re-open it again */
4432 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4433 crq->msg_token, PAGE_SIZE);
4434
4435 if (rc == H_CLOSED)
4436 /* Adapter is good, but other end is not ready */
4437 dev_warn(dev, "Partner adapter not ready\n");
4438 else if (rc != 0)
4439 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4440
4441 return rc;
4442}
4443
4444static void release_crq_queue(struct ibmvnic_adapter *adapter)
4445{
4446 struct ibmvnic_crq_queue *crq = &adapter->crq;
4447 struct vio_dev *vdev = adapter->vdev;
4448 long rc;
4449
4450 if (!crq->msgs)
4451 return;
4452
4453 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4454 free_irq(vdev->irq, adapter);
4455 tasklet_kill(&adapter->tasklet);
4456 do {
4457 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4458 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4459
4460 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4461 DMA_BIDIRECTIONAL);
4462 free_page((unsigned long)crq->msgs);
4463 crq->msgs = NULL;
4464}
4465
4466static int init_crq_queue(struct ibmvnic_adapter *adapter)
4467{
4468 struct ibmvnic_crq_queue *crq = &adapter->crq;
4469 struct device *dev = &adapter->vdev->dev;
4470 struct vio_dev *vdev = adapter->vdev;
4471 int rc, retrc = -ENOMEM;
4472
4473 if (crq->msgs)
4474 return 0;
4475
4476 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4477 /* Should we allocate more than one page? */
4478
4479 if (!crq->msgs)
4480 return -ENOMEM;
4481
4482 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4483 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4484 DMA_BIDIRECTIONAL);
4485 if (dma_mapping_error(dev, crq->msg_token))
4486 goto map_failed;
4487
4488 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4489 crq->msg_token, PAGE_SIZE);
4490
4491 if (rc == H_RESOURCE)
4492 /* maybe kexecing and resource is busy. try a reset */
4493 rc = ibmvnic_reset_crq(adapter);
4494 retrc = rc;
4495
4496 if (rc == H_CLOSED) {
4497 dev_warn(dev, "Partner adapter not ready\n");
4498 } else if (rc) {
4499 dev_warn(dev, "Error %d opening adapter\n", rc);
4500 goto reg_crq_failed;
4501 }
4502
4503 retrc = 0;
4504
4505 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4506 (unsigned long)adapter);
4507
4508 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4509 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4510 adapter);
4511 if (rc) {
4512 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4513 vdev->irq, rc);
4514 goto req_irq_failed;
4515 }
4516
4517 rc = vio_enable_interrupts(vdev);
4518 if (rc) {
4519 dev_err(dev, "Error %d enabling interrupts\n", rc);
4520 goto req_irq_failed;
4521 }
4522
4523 crq->cur = 0;
4524 spin_lock_init(&crq->lock);
4525
4526 return retrc;
4527
4528req_irq_failed:
4529 tasklet_kill(&adapter->tasklet);
4530 do {
4531 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4532 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4533reg_crq_failed:
4534 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4535map_failed:
4536 free_page((unsigned long)crq->msgs);
4537 crq->msgs = NULL;
4538 return retrc;
4539}
4540
4541static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4542{
4543 struct device *dev = &adapter->vdev->dev;
4544 unsigned long timeout = msecs_to_jiffies(30000);
4545 u64 old_num_rx_queues, old_num_tx_queues;
4546 int rc;
4547
4548 adapter->from_passive_init = false;
4549
4550 old_num_rx_queues = adapter->req_rx_queues;
4551 old_num_tx_queues = adapter->req_tx_queues;
4552
4553 init_completion(&adapter->init_done);
4554 adapter->init_done_rc = 0;
4555 ibmvnic_send_crq_init(adapter);
4556 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4557 dev_err(dev, "Initialization sequence timed out\n");
4558 return -1;
4559 }
4560
4561 if (adapter->init_done_rc) {
4562 release_crq_queue(adapter);
4563 return adapter->init_done_rc;
4564 }
4565
4566 if (adapter->from_passive_init) {
4567 adapter->state = VNIC_OPEN;
4568 adapter->from_passive_init = false;
4569 return -1;
4570 }
4571
4572 if (adapter->resetting && !adapter->wait_for_reset &&
4573 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4574 if (adapter->req_rx_queues != old_num_rx_queues ||
4575 adapter->req_tx_queues != old_num_tx_queues) {
4576 release_sub_crqs(adapter, 0);
4577 rc = init_sub_crqs(adapter);
4578 } else {
4579 rc = reset_sub_crq_queues(adapter);
4580 }
4581 } else {
4582 rc = init_sub_crqs(adapter);
4583 }
4584
4585 if (rc) {
4586 dev_err(dev, "Initialization of sub crqs failed\n");
4587 release_crq_queue(adapter);
4588 return rc;
4589 }
4590
4591 rc = init_sub_crq_irqs(adapter);
4592 if (rc) {
4593 dev_err(dev, "Failed to initialize sub crq irqs\n");
4594 release_crq_queue(adapter);
4595 }
4596
4597 return rc;
4598}
4599
4600static struct device_attribute dev_attr_failover;
4601
4602static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4603{
4604 struct ibmvnic_adapter *adapter;
4605 struct net_device *netdev;
4606 unsigned char *mac_addr_p;
4607 int rc;
4608
4609 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4610 dev->unit_address);
4611
4612 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4613 VETH_MAC_ADDR, NULL);
4614 if (!mac_addr_p) {
4615 dev_err(&dev->dev,
4616 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4617 __FILE__, __LINE__);
4618 return 0;
4619 }
4620
4621 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4622 IBMVNIC_MAX_QUEUES);
4623 if (!netdev)
4624 return -ENOMEM;
4625
4626 adapter = netdev_priv(netdev);
4627 adapter->state = VNIC_PROBING;
4628 dev_set_drvdata(&dev->dev, netdev);
4629 adapter->vdev = dev;
4630 adapter->netdev = netdev;
4631
4632 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4633 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4634 netdev->irq = dev->irq;
4635 netdev->netdev_ops = &ibmvnic_netdev_ops;
4636 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4637 SET_NETDEV_DEV(netdev, &dev->dev);
4638
4639 spin_lock_init(&adapter->stats_lock);
4640
4641 INIT_LIST_HEAD(&adapter->errors);
4642 spin_lock_init(&adapter->error_list_lock);
4643
4644 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4645 INIT_LIST_HEAD(&adapter->rwi_list);
4646 mutex_init(&adapter->reset_lock);
4647 mutex_init(&adapter->rwi_lock);
4648 adapter->resetting = false;
4649
4650 adapter->mac_change_pending = false;
4651
4652 do {
4653 rc = init_crq_queue(adapter);
4654 if (rc) {
4655 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4656 rc);
4657 goto ibmvnic_init_fail;
4658 }
4659
4660 rc = ibmvnic_init(adapter);
4661 if (rc && rc != EAGAIN)
4662 goto ibmvnic_init_fail;
4663 } while (rc == EAGAIN);
4664
4665 rc = init_stats_buffers(adapter);
4666 if (rc)
4667 goto ibmvnic_init_fail;
4668
4669 rc = init_stats_token(adapter);
4670 if (rc)
4671 goto ibmvnic_stats_fail;
4672
4673 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4674 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4675 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4676
4677 rc = device_create_file(&dev->dev, &dev_attr_failover);
4678 if (rc)
4679 goto ibmvnic_dev_file_err;
4680
4681 netif_carrier_off(netdev);
4682 rc = register_netdev(netdev);
4683 if (rc) {
4684 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4685 goto ibmvnic_register_fail;
4686 }
4687 dev_info(&dev->dev, "ibmvnic registered\n");
4688
4689 adapter->state = VNIC_PROBED;
4690
4691 adapter->wait_for_reset = false;
4692
4693 return 0;
4694
4695ibmvnic_register_fail:
4696 device_remove_file(&dev->dev, &dev_attr_failover);
4697
4698ibmvnic_dev_file_err:
4699 release_stats_token(adapter);
4700
4701ibmvnic_stats_fail:
4702 release_stats_buffers(adapter);
4703
4704ibmvnic_init_fail:
4705 release_sub_crqs(adapter, 1);
4706 release_crq_queue(adapter);
4707 free_netdev(netdev);
4708
4709 return rc;
4710}
4711
4712static int ibmvnic_remove(struct vio_dev *dev)
4713{
4714 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4715 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4716
4717 adapter->state = VNIC_REMOVING;
4718 unregister_netdev(netdev);
4719 mutex_lock(&adapter->reset_lock);
4720
4721 release_resources(adapter);
4722 release_sub_crqs(adapter, 1);
4723 release_crq_queue(adapter);
4724
4725 release_stats_token(adapter);
4726 release_stats_buffers(adapter);
4727
4728 adapter->state = VNIC_REMOVED;
4729
4730 mutex_unlock(&adapter->reset_lock);
4731 device_remove_file(&dev->dev, &dev_attr_failover);
4732 free_netdev(netdev);
4733 dev_set_drvdata(&dev->dev, NULL);
4734
4735 return 0;
4736}
4737
4738static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4739 const char *buf, size_t count)
4740{
4741 struct net_device *netdev = dev_get_drvdata(dev);
4742 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4743 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4744 __be64 session_token;
4745 long rc;
4746
4747 if (!sysfs_streq(buf, "1"))
4748 return -EINVAL;
4749
4750 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4751 H_GET_SESSION_TOKEN, 0, 0, 0);
4752 if (rc) {
4753 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4754 rc);
4755 return -EINVAL;
4756 }
4757
4758 session_token = (__be64)retbuf[0];
4759 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4760 be64_to_cpu(session_token));
4761 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4762 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4763 if (rc) {
4764 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4765 rc);
4766 return -EINVAL;
4767 }
4768
4769 return count;
4770}
4771
4772static DEVICE_ATTR_WO(failover);
4773
4774static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4775{
4776 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4777 struct ibmvnic_adapter *adapter;
4778 struct iommu_table *tbl;
4779 unsigned long ret = 0;
4780 int i;
4781
4782 tbl = get_iommu_table_base(&vdev->dev);
4783
4784 /* netdev inits at probe time along with the structures we need below*/
4785 if (!netdev)
4786 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4787
4788 adapter = netdev_priv(netdev);
4789
4790 ret += PAGE_SIZE; /* the crq message queue */
4791 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4792
4793 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4794 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4795
4796 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4797 i++)
4798 ret += adapter->rx_pool[i].size *
4799 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4800
4801 return ret;
4802}
4803
4804static int ibmvnic_resume(struct device *dev)
4805{
4806 struct net_device *netdev = dev_get_drvdata(dev);
4807 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4808
4809 if (adapter->state != VNIC_OPEN)
4810 return 0;
4811
4812 tasklet_schedule(&adapter->tasklet);
4813
4814 return 0;
4815}
4816
4817static const struct vio_device_id ibmvnic_device_table[] = {
4818 {"network", "IBM,vnic"},
4819 {"", "" }
4820};
4821MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4822
4823static const struct dev_pm_ops ibmvnic_pm_ops = {
4824 .resume = ibmvnic_resume
4825};
4826
4827static struct vio_driver ibmvnic_driver = {
4828 .id_table = ibmvnic_device_table,
4829 .probe = ibmvnic_probe,
4830 .remove = ibmvnic_remove,
4831 .get_desired_dma = ibmvnic_get_desired_dma,
4832 .name = ibmvnic_driver_name,
4833 .pm = &ibmvnic_pm_ops,
4834};
4835
4836/* module functions */
4837static int __init ibmvnic_module_init(void)
4838{
4839 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4840 IBMVNIC_DRIVER_VERSION);
4841
4842 return vio_register_driver(&ibmvnic_driver);
4843}
4844
4845static void __exit ibmvnic_module_exit(void)
4846{
4847 vio_unregister_driver(&ibmvnic_driver);
4848}
4849
4850module_init(ibmvnic_module_init);
4851module_exit(ibmvnic_module_exit);