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Merge branch 'for-5.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis...
[thirdparty/linux.git] / drivers / net / ethernet / ibm / ibmvnic.c
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
83 static const char ibmvnic_driver_name[] = "ibmvnic";
84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
86 MODULE_AUTHOR("Santiago Leon");
87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92 static int ibmvnic_remove(struct vio_dev *);
93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static int send_request_unmap(struct ibmvnic_adapter *, u8);
114 static int send_login(struct ibmvnic_adapter *adapter);
115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
116 static int init_sub_crqs(struct ibmvnic_adapter *);
117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118 static int ibmvnic_init(struct ibmvnic_adapter *);
119 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
120 static void release_crq_queue(struct ibmvnic_adapter *);
121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
122 static int init_crq_queue(struct ibmvnic_adapter *adapter);
123
124 struct ibmvnic_stat {
125 char name[ETH_GSTRING_LEN];
126 int offset;
127 };
128
129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
130 offsetof(struct ibmvnic_statistics, stat))
131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
132
133 static const struct ibmvnic_stat ibmvnic_stats[] = {
134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
156 };
157
158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
159 unsigned long length, unsigned long *number,
160 unsigned long *irq)
161 {
162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
163 long rc;
164
165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
166 *number = retbuf[0];
167 *irq = retbuf[1];
168
169 return rc;
170 }
171
172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
173 struct ibmvnic_long_term_buff *ltb, int size)
174 {
175 struct device *dev = &adapter->vdev->dev;
176 int rc;
177
178 ltb->size = size;
179 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
180 GFP_KERNEL);
181
182 if (!ltb->buff) {
183 dev_err(dev, "Couldn't alloc long term buffer\n");
184 return -ENOMEM;
185 }
186 ltb->map_id = adapter->map_id;
187 adapter->map_id++;
188
189 init_completion(&adapter->fw_done);
190 rc = send_request_map(adapter, ltb->addr,
191 ltb->size, ltb->map_id);
192 if (rc) {
193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
194 return rc;
195 }
196 wait_for_completion(&adapter->fw_done);
197
198 if (adapter->fw_done_rc) {
199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
200 adapter->fw_done_rc);
201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
202 return -1;
203 }
204 return 0;
205 }
206
207 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
208 struct ibmvnic_long_term_buff *ltb)
209 {
210 struct device *dev = &adapter->vdev->dev;
211
212 if (!ltb->buff)
213 return;
214
215 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
216 adapter->reset_reason != VNIC_RESET_MOBILITY)
217 send_request_unmap(adapter, ltb->map_id);
218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
219 }
220
221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
222 struct ibmvnic_long_term_buff *ltb)
223 {
224 int rc;
225
226 memset(ltb->buff, 0, ltb->size);
227
228 init_completion(&adapter->fw_done);
229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
230 if (rc)
231 return rc;
232 wait_for_completion(&adapter->fw_done);
233
234 if (adapter->fw_done_rc) {
235 dev_info(&adapter->vdev->dev,
236 "Reset failed, attempting to free and reallocate buffer\n");
237 free_long_term_buff(adapter, ltb);
238 return alloc_long_term_buff(adapter, ltb, ltb->size);
239 }
240 return 0;
241 }
242
243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
244 {
245 int i;
246
247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
248 i++)
249 adapter->rx_pool[i].active = 0;
250 }
251
252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
253 struct ibmvnic_rx_pool *pool)
254 {
255 int count = pool->size - atomic_read(&pool->available);
256 struct device *dev = &adapter->vdev->dev;
257 int buffers_added = 0;
258 unsigned long lpar_rc;
259 union sub_crq sub_crq;
260 struct sk_buff *skb;
261 unsigned int offset;
262 dma_addr_t dma_addr;
263 unsigned char *dst;
264 u64 *handle_array;
265 int shift = 0;
266 int index;
267 int i;
268
269 if (!pool->active)
270 return;
271
272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
273 be32_to_cpu(adapter->login_rsp_buf->
274 off_rxadd_subcrqs));
275
276 for (i = 0; i < count; ++i) {
277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
278 if (!skb) {
279 dev_err(dev, "Couldn't replenish rx buff\n");
280 adapter->replenish_no_mem++;
281 break;
282 }
283
284 index = pool->free_map[pool->next_free];
285
286 if (pool->rx_buff[index].skb)
287 dev_err(dev, "Inconsistent free_map!\n");
288
289 /* Copy the skb to the long term mapped DMA buffer */
290 offset = index * pool->buff_size;
291 dst = pool->long_term_buff.buff + offset;
292 memset(dst, 0, pool->buff_size);
293 dma_addr = pool->long_term_buff.addr + offset;
294 pool->rx_buff[index].data = dst;
295
296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
297 pool->rx_buff[index].dma = dma_addr;
298 pool->rx_buff[index].skb = skb;
299 pool->rx_buff[index].pool_index = pool->index;
300 pool->rx_buff[index].size = pool->buff_size;
301
302 memset(&sub_crq, 0, sizeof(sub_crq));
303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
304 sub_crq.rx_add.correlator =
305 cpu_to_be64((u64)&pool->rx_buff[index]);
306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
308
309 /* The length field of the sCRQ is defined to be 24 bits so the
310 * buffer size needs to be left shifted by a byte before it is
311 * converted to big endian to prevent the last byte from being
312 * truncated.
313 */
314 #ifdef __LITTLE_ENDIAN__
315 shift = 8;
316 #endif
317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
318
319 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
320 &sub_crq);
321 if (lpar_rc != H_SUCCESS)
322 goto failure;
323
324 buffers_added++;
325 adapter->replenish_add_buff_success++;
326 pool->next_free = (pool->next_free + 1) % pool->size;
327 }
328 atomic_add(buffers_added, &pool->available);
329 return;
330
331 failure:
332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
334 pool->free_map[pool->next_free] = index;
335 pool->rx_buff[index].skb = NULL;
336
337 dev_kfree_skb_any(skb);
338 adapter->replenish_add_buff_failure++;
339 atomic_add(buffers_added, &pool->available);
340
341 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
342 /* Disable buffer pool replenishment and report carrier off if
343 * queue is closed or pending failover.
344 * Firmware guarantees that a signal will be sent to the
345 * driver, triggering a reset.
346 */
347 deactivate_rx_pools(adapter);
348 netif_carrier_off(adapter->netdev);
349 }
350 }
351
352 static void replenish_pools(struct ibmvnic_adapter *adapter)
353 {
354 int i;
355
356 adapter->replenish_task_cycles++;
357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
358 i++) {
359 if (adapter->rx_pool[i].active)
360 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
361 }
362 }
363
364 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
365 {
366 kfree(adapter->tx_stats_buffers);
367 kfree(adapter->rx_stats_buffers);
368 adapter->tx_stats_buffers = NULL;
369 adapter->rx_stats_buffers = NULL;
370 }
371
372 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
373 {
374 adapter->tx_stats_buffers =
375 kcalloc(IBMVNIC_MAX_QUEUES,
376 sizeof(struct ibmvnic_tx_queue_stats),
377 GFP_KERNEL);
378 if (!adapter->tx_stats_buffers)
379 return -ENOMEM;
380
381 adapter->rx_stats_buffers =
382 kcalloc(IBMVNIC_MAX_QUEUES,
383 sizeof(struct ibmvnic_rx_queue_stats),
384 GFP_KERNEL);
385 if (!adapter->rx_stats_buffers)
386 return -ENOMEM;
387
388 return 0;
389 }
390
391 static void release_stats_token(struct ibmvnic_adapter *adapter)
392 {
393 struct device *dev = &adapter->vdev->dev;
394
395 if (!adapter->stats_token)
396 return;
397
398 dma_unmap_single(dev, adapter->stats_token,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 adapter->stats_token = 0;
402 }
403
404 static int init_stats_token(struct ibmvnic_adapter *adapter)
405 {
406 struct device *dev = &adapter->vdev->dev;
407 dma_addr_t stok;
408
409 stok = dma_map_single(dev, &adapter->stats,
410 sizeof(struct ibmvnic_statistics),
411 DMA_FROM_DEVICE);
412 if (dma_mapping_error(dev, stok)) {
413 dev_err(dev, "Couldn't map stats buffer\n");
414 return -1;
415 }
416
417 adapter->stats_token = stok;
418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
419 return 0;
420 }
421
422 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
423 {
424 struct ibmvnic_rx_pool *rx_pool;
425 int rx_scrqs;
426 int i, j, rc;
427 u64 *size_array;
428
429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
431
432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
433 for (i = 0; i < rx_scrqs; i++) {
434 rx_pool = &adapter->rx_pool[i];
435
436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
437
438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
439 free_long_term_buff(adapter, &rx_pool->long_term_buff);
440 rx_pool->buff_size = be64_to_cpu(size_array[i]);
441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
442 rx_pool->size *
443 rx_pool->buff_size);
444 } else {
445 rc = reset_long_term_buff(adapter,
446 &rx_pool->long_term_buff);
447 }
448
449 if (rc)
450 return rc;
451
452 for (j = 0; j < rx_pool->size; j++)
453 rx_pool->free_map[j] = j;
454
455 memset(rx_pool->rx_buff, 0,
456 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
457
458 atomic_set(&rx_pool->available, 0);
459 rx_pool->next_alloc = 0;
460 rx_pool->next_free = 0;
461 rx_pool->active = 1;
462 }
463
464 return 0;
465 }
466
467 static void release_rx_pools(struct ibmvnic_adapter *adapter)
468 {
469 struct ibmvnic_rx_pool *rx_pool;
470 int i, j;
471
472 if (!adapter->rx_pool)
473 return;
474
475 for (i = 0; i < adapter->num_active_rx_pools; i++) {
476 rx_pool = &adapter->rx_pool[i];
477
478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
479
480 kfree(rx_pool->free_map);
481 free_long_term_buff(adapter, &rx_pool->long_term_buff);
482
483 if (!rx_pool->rx_buff)
484 continue;
485
486 for (j = 0; j < rx_pool->size; j++) {
487 if (rx_pool->rx_buff[j].skb) {
488 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
489 rx_pool->rx_buff[j].skb = NULL;
490 }
491 }
492
493 kfree(rx_pool->rx_buff);
494 }
495
496 kfree(adapter->rx_pool);
497 adapter->rx_pool = NULL;
498 adapter->num_active_rx_pools = 0;
499 }
500
501 static int init_rx_pools(struct net_device *netdev)
502 {
503 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
504 struct device *dev = &adapter->vdev->dev;
505 struct ibmvnic_rx_pool *rx_pool;
506 int rxadd_subcrqs;
507 u64 *size_array;
508 int i, j;
509
510 rxadd_subcrqs =
511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
514
515 adapter->rx_pool = kcalloc(rxadd_subcrqs,
516 sizeof(struct ibmvnic_rx_pool),
517 GFP_KERNEL);
518 if (!adapter->rx_pool) {
519 dev_err(dev, "Failed to allocate rx pools\n");
520 return -1;
521 }
522
523 adapter->num_active_rx_pools = rxadd_subcrqs;
524
525 for (i = 0; i < rxadd_subcrqs; i++) {
526 rx_pool = &adapter->rx_pool[i];
527
528 netdev_dbg(adapter->netdev,
529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
530 i, adapter->req_rx_add_entries_per_subcrq,
531 be64_to_cpu(size_array[i]));
532
533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
534 rx_pool->index = i;
535 rx_pool->buff_size = be64_to_cpu(size_array[i]);
536 rx_pool->active = 1;
537
538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
539 GFP_KERNEL);
540 if (!rx_pool->free_map) {
541 release_rx_pools(adapter);
542 return -1;
543 }
544
545 rx_pool->rx_buff = kcalloc(rx_pool->size,
546 sizeof(struct ibmvnic_rx_buff),
547 GFP_KERNEL);
548 if (!rx_pool->rx_buff) {
549 dev_err(dev, "Couldn't alloc rx buffers\n");
550 release_rx_pools(adapter);
551 return -1;
552 }
553
554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
555 rx_pool->size * rx_pool->buff_size)) {
556 release_rx_pools(adapter);
557 return -1;
558 }
559
560 for (j = 0; j < rx_pool->size; ++j)
561 rx_pool->free_map[j] = j;
562
563 atomic_set(&rx_pool->available, 0);
564 rx_pool->next_alloc = 0;
565 rx_pool->next_free = 0;
566 }
567
568 return 0;
569 }
570
571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
572 struct ibmvnic_tx_pool *tx_pool)
573 {
574 int rc, i;
575
576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
577 if (rc)
578 return rc;
579
580 memset(tx_pool->tx_buff, 0,
581 tx_pool->num_buffers *
582 sizeof(struct ibmvnic_tx_buff));
583
584 for (i = 0; i < tx_pool->num_buffers; i++)
585 tx_pool->free_map[i] = i;
586
587 tx_pool->consumer_index = 0;
588 tx_pool->producer_index = 0;
589
590 return 0;
591 }
592
593 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
594 {
595 int tx_scrqs;
596 int i, rc;
597
598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
599 for (i = 0; i < tx_scrqs; i++) {
600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
601 if (rc)
602 return rc;
603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
604 if (rc)
605 return rc;
606 }
607
608 return 0;
609 }
610
611 static void release_vpd_data(struct ibmvnic_adapter *adapter)
612 {
613 if (!adapter->vpd)
614 return;
615
616 kfree(adapter->vpd->buff);
617 kfree(adapter->vpd);
618
619 adapter->vpd = NULL;
620 }
621
622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
623 struct ibmvnic_tx_pool *tx_pool)
624 {
625 kfree(tx_pool->tx_buff);
626 kfree(tx_pool->free_map);
627 free_long_term_buff(adapter, &tx_pool->long_term_buff);
628 }
629
630 static void release_tx_pools(struct ibmvnic_adapter *adapter)
631 {
632 int i;
633
634 if (!adapter->tx_pool)
635 return;
636
637 for (i = 0; i < adapter->num_active_tx_pools; i++) {
638 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
639 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
640 }
641
642 kfree(adapter->tx_pool);
643 adapter->tx_pool = NULL;
644 kfree(adapter->tso_pool);
645 adapter->tso_pool = NULL;
646 adapter->num_active_tx_pools = 0;
647 }
648
649 static int init_one_tx_pool(struct net_device *netdev,
650 struct ibmvnic_tx_pool *tx_pool,
651 int num_entries, int buf_size)
652 {
653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
654 int i;
655
656 tx_pool->tx_buff = kcalloc(num_entries,
657 sizeof(struct ibmvnic_tx_buff),
658 GFP_KERNEL);
659 if (!tx_pool->tx_buff)
660 return -1;
661
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 num_entries * buf_size))
664 return -1;
665
666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
667 if (!tx_pool->free_map)
668 return -1;
669
670 for (i = 0; i < num_entries; i++)
671 tx_pool->free_map[i] = i;
672
673 tx_pool->consumer_index = 0;
674 tx_pool->producer_index = 0;
675 tx_pool->num_buffers = num_entries;
676 tx_pool->buf_size = buf_size;
677
678 return 0;
679 }
680
681 static int init_tx_pools(struct net_device *netdev)
682 {
683 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
684 int tx_subcrqs;
685 int i, rc;
686
687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
688 adapter->tx_pool = kcalloc(tx_subcrqs,
689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
690 if (!adapter->tx_pool)
691 return -1;
692
693 adapter->tso_pool = kcalloc(tx_subcrqs,
694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
695 if (!adapter->tso_pool)
696 return -1;
697
698 adapter->num_active_tx_pools = tx_subcrqs;
699
700 for (i = 0; i < tx_subcrqs; i++) {
701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
702 adapter->req_tx_entries_per_subcrq,
703 adapter->req_mtu + VLAN_HLEN);
704 if (rc) {
705 release_tx_pools(adapter);
706 return rc;
707 }
708
709 init_one_tx_pool(netdev, &adapter->tso_pool[i],
710 IBMVNIC_TSO_BUFS,
711 IBMVNIC_TSO_BUF_SZ);
712 if (rc) {
713 release_tx_pools(adapter);
714 return rc;
715 }
716 }
717
718 return 0;
719 }
720
721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
722 {
723 int i;
724
725 if (adapter->napi_enabled)
726 return;
727
728 for (i = 0; i < adapter->req_rx_queues; i++)
729 napi_enable(&adapter->napi[i]);
730
731 adapter->napi_enabled = true;
732 }
733
734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
735 {
736 int i;
737
738 if (!adapter->napi_enabled)
739 return;
740
741 for (i = 0; i < adapter->req_rx_queues; i++) {
742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
743 napi_disable(&adapter->napi[i]);
744 }
745
746 adapter->napi_enabled = false;
747 }
748
749 static int init_napi(struct ibmvnic_adapter *adapter)
750 {
751 int i;
752
753 adapter->napi = kcalloc(adapter->req_rx_queues,
754 sizeof(struct napi_struct), GFP_KERNEL);
755 if (!adapter->napi)
756 return -ENOMEM;
757
758 for (i = 0; i < adapter->req_rx_queues; i++) {
759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
760 netif_napi_add(adapter->netdev, &adapter->napi[i],
761 ibmvnic_poll, NAPI_POLL_WEIGHT);
762 }
763
764 adapter->num_active_rx_napi = adapter->req_rx_queues;
765 return 0;
766 }
767
768 static void release_napi(struct ibmvnic_adapter *adapter)
769 {
770 int i;
771
772 if (!adapter->napi)
773 return;
774
775 for (i = 0; i < adapter->num_active_rx_napi; i++) {
776 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
777 netif_napi_del(&adapter->napi[i]);
778 }
779
780 kfree(adapter->napi);
781 adapter->napi = NULL;
782 adapter->num_active_rx_napi = 0;
783 adapter->napi_enabled = false;
784 }
785
786 static int ibmvnic_login(struct net_device *netdev)
787 {
788 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
789 unsigned long timeout = msecs_to_jiffies(30000);
790 int retry_count = 0;
791 bool retry;
792 int rc;
793
794 do {
795 retry = false;
796 if (retry_count > IBMVNIC_MAX_QUEUES) {
797 netdev_warn(netdev, "Login attempts exceeded\n");
798 return -1;
799 }
800
801 adapter->init_done_rc = 0;
802 reinit_completion(&adapter->init_done);
803 rc = send_login(adapter);
804 if (rc) {
805 netdev_warn(netdev, "Unable to login\n");
806 return rc;
807 }
808
809 if (!wait_for_completion_timeout(&adapter->init_done,
810 timeout)) {
811 netdev_warn(netdev, "Login timed out\n");
812 return -1;
813 }
814
815 if (adapter->init_done_rc == PARTIALSUCCESS) {
816 retry_count++;
817 release_sub_crqs(adapter, 1);
818
819 retry = true;
820 netdev_dbg(netdev,
821 "Received partial success, retrying...\n");
822 adapter->init_done_rc = 0;
823 reinit_completion(&adapter->init_done);
824 send_cap_queries(adapter);
825 if (!wait_for_completion_timeout(&adapter->init_done,
826 timeout)) {
827 netdev_warn(netdev,
828 "Capabilities query timed out\n");
829 return -1;
830 }
831
832 rc = init_sub_crqs(adapter);
833 if (rc) {
834 netdev_warn(netdev,
835 "SCRQ initialization failed\n");
836 return -1;
837 }
838
839 rc = init_sub_crq_irqs(adapter);
840 if (rc) {
841 netdev_warn(netdev,
842 "SCRQ irq initialization failed\n");
843 return -1;
844 }
845 } else if (adapter->init_done_rc) {
846 netdev_warn(netdev, "Adapter login failed\n");
847 return -1;
848 }
849 } while (retry);
850
851 /* handle pending MAC address changes after successful login */
852 if (adapter->mac_change_pending) {
853 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
854 adapter->mac_change_pending = false;
855 }
856
857 return 0;
858 }
859
860 static void release_login_buffer(struct ibmvnic_adapter *adapter)
861 {
862 kfree(adapter->login_buf);
863 adapter->login_buf = NULL;
864 }
865
866 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
867 {
868 kfree(adapter->login_rsp_buf);
869 adapter->login_rsp_buf = NULL;
870 }
871
872 static void release_resources(struct ibmvnic_adapter *adapter)
873 {
874 release_vpd_data(adapter);
875
876 release_tx_pools(adapter);
877 release_rx_pools(adapter);
878
879 release_napi(adapter);
880 release_login_rsp_buffer(adapter);
881 }
882
883 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
884 {
885 struct net_device *netdev = adapter->netdev;
886 unsigned long timeout = msecs_to_jiffies(30000);
887 union ibmvnic_crq crq;
888 bool resend;
889 int rc;
890
891 netdev_dbg(netdev, "setting link state %d\n", link_state);
892
893 memset(&crq, 0, sizeof(crq));
894 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
895 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
896 crq.logical_link_state.link_state = link_state;
897
898 do {
899 resend = false;
900
901 reinit_completion(&adapter->init_done);
902 rc = ibmvnic_send_crq(adapter, &crq);
903 if (rc) {
904 netdev_err(netdev, "Failed to set link state\n");
905 return rc;
906 }
907
908 if (!wait_for_completion_timeout(&adapter->init_done,
909 timeout)) {
910 netdev_err(netdev, "timeout setting link state\n");
911 return -1;
912 }
913
914 if (adapter->init_done_rc == 1) {
915 /* Partuial success, delay and re-send */
916 mdelay(1000);
917 resend = true;
918 } else if (adapter->init_done_rc) {
919 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
920 adapter->init_done_rc);
921 return adapter->init_done_rc;
922 }
923 } while (resend);
924
925 return 0;
926 }
927
928 static int set_real_num_queues(struct net_device *netdev)
929 {
930 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
931 int rc;
932
933 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
934 adapter->req_tx_queues, adapter->req_rx_queues);
935
936 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
937 if (rc) {
938 netdev_err(netdev, "failed to set the number of tx queues\n");
939 return rc;
940 }
941
942 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
943 if (rc)
944 netdev_err(netdev, "failed to set the number of rx queues\n");
945
946 return rc;
947 }
948
949 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
950 {
951 struct device *dev = &adapter->vdev->dev;
952 union ibmvnic_crq crq;
953 int len = 0;
954 int rc;
955
956 if (adapter->vpd->buff)
957 len = adapter->vpd->len;
958
959 init_completion(&adapter->fw_done);
960 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
961 crq.get_vpd_size.cmd = GET_VPD_SIZE;
962 rc = ibmvnic_send_crq(adapter, &crq);
963 if (rc)
964 return rc;
965 wait_for_completion(&adapter->fw_done);
966
967 if (!adapter->vpd->len)
968 return -ENODATA;
969
970 if (!adapter->vpd->buff)
971 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
972 else if (adapter->vpd->len != len)
973 adapter->vpd->buff =
974 krealloc(adapter->vpd->buff,
975 adapter->vpd->len, GFP_KERNEL);
976
977 if (!adapter->vpd->buff) {
978 dev_err(dev, "Could allocate VPD buffer\n");
979 return -ENOMEM;
980 }
981
982 adapter->vpd->dma_addr =
983 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
984 DMA_FROM_DEVICE);
985 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
986 dev_err(dev, "Could not map VPD buffer\n");
987 kfree(adapter->vpd->buff);
988 adapter->vpd->buff = NULL;
989 return -ENOMEM;
990 }
991
992 reinit_completion(&adapter->fw_done);
993 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
994 crq.get_vpd.cmd = GET_VPD;
995 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
996 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
997 rc = ibmvnic_send_crq(adapter, &crq);
998 if (rc) {
999 kfree(adapter->vpd->buff);
1000 adapter->vpd->buff = NULL;
1001 return rc;
1002 }
1003 wait_for_completion(&adapter->fw_done);
1004
1005 return 0;
1006 }
1007
1008 static int init_resources(struct ibmvnic_adapter *adapter)
1009 {
1010 struct net_device *netdev = adapter->netdev;
1011 int rc;
1012
1013 rc = set_real_num_queues(netdev);
1014 if (rc)
1015 return rc;
1016
1017 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1018 if (!adapter->vpd)
1019 return -ENOMEM;
1020
1021 /* Vital Product Data (VPD) */
1022 rc = ibmvnic_get_vpd(adapter);
1023 if (rc) {
1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1025 return rc;
1026 }
1027
1028 adapter->map_id = 1;
1029
1030 rc = init_napi(adapter);
1031 if (rc)
1032 return rc;
1033
1034 send_map_query(adapter);
1035
1036 rc = init_rx_pools(netdev);
1037 if (rc)
1038 return rc;
1039
1040 rc = init_tx_pools(netdev);
1041 return rc;
1042 }
1043
1044 static int __ibmvnic_open(struct net_device *netdev)
1045 {
1046 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1047 enum vnic_state prev_state = adapter->state;
1048 int i, rc;
1049
1050 adapter->state = VNIC_OPENING;
1051 replenish_pools(adapter);
1052 ibmvnic_napi_enable(adapter);
1053
1054 /* We're ready to receive frames, enable the sub-crq interrupts and
1055 * set the logical link state to up
1056 */
1057 for (i = 0; i < adapter->req_rx_queues; i++) {
1058 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1059 if (prev_state == VNIC_CLOSED)
1060 enable_irq(adapter->rx_scrq[i]->irq);
1061 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1062 }
1063
1064 for (i = 0; i < adapter->req_tx_queues; i++) {
1065 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1066 if (prev_state == VNIC_CLOSED)
1067 enable_irq(adapter->tx_scrq[i]->irq);
1068 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1069 }
1070
1071 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1072 if (rc) {
1073 for (i = 0; i < adapter->req_rx_queues; i++)
1074 napi_disable(&adapter->napi[i]);
1075 release_resources(adapter);
1076 return rc;
1077 }
1078
1079 netif_tx_start_all_queues(netdev);
1080
1081 if (prev_state == VNIC_CLOSED) {
1082 for (i = 0; i < adapter->req_rx_queues; i++)
1083 napi_schedule(&adapter->napi[i]);
1084 }
1085
1086 adapter->state = VNIC_OPEN;
1087 return rc;
1088 }
1089
1090 static int ibmvnic_open(struct net_device *netdev)
1091 {
1092 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1093 int rc;
1094
1095 /* If device failover is pending, just set device state and return.
1096 * Device operation will be handled by reset routine.
1097 */
1098 if (adapter->failover_pending) {
1099 adapter->state = VNIC_OPEN;
1100 return 0;
1101 }
1102
1103 if (adapter->state != VNIC_CLOSED) {
1104 rc = ibmvnic_login(netdev);
1105 if (rc)
1106 return rc;
1107
1108 rc = init_resources(adapter);
1109 if (rc) {
1110 netdev_err(netdev, "failed to initialize resources\n");
1111 release_resources(adapter);
1112 return rc;
1113 }
1114 }
1115
1116 rc = __ibmvnic_open(netdev);
1117 netif_carrier_on(netdev);
1118
1119 return rc;
1120 }
1121
1122 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1123 {
1124 struct ibmvnic_rx_pool *rx_pool;
1125 struct ibmvnic_rx_buff *rx_buff;
1126 u64 rx_entries;
1127 int rx_scrqs;
1128 int i, j;
1129
1130 if (!adapter->rx_pool)
1131 return;
1132
1133 rx_scrqs = adapter->num_active_rx_pools;
1134 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1135
1136 /* Free any remaining skbs in the rx buffer pools */
1137 for (i = 0; i < rx_scrqs; i++) {
1138 rx_pool = &adapter->rx_pool[i];
1139 if (!rx_pool || !rx_pool->rx_buff)
1140 continue;
1141
1142 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1143 for (j = 0; j < rx_entries; j++) {
1144 rx_buff = &rx_pool->rx_buff[j];
1145 if (rx_buff && rx_buff->skb) {
1146 dev_kfree_skb_any(rx_buff->skb);
1147 rx_buff->skb = NULL;
1148 }
1149 }
1150 }
1151 }
1152
1153 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1154 struct ibmvnic_tx_pool *tx_pool)
1155 {
1156 struct ibmvnic_tx_buff *tx_buff;
1157 u64 tx_entries;
1158 int i;
1159
1160 if (!tx_pool || !tx_pool->tx_buff)
1161 return;
1162
1163 tx_entries = tx_pool->num_buffers;
1164
1165 for (i = 0; i < tx_entries; i++) {
1166 tx_buff = &tx_pool->tx_buff[i];
1167 if (tx_buff && tx_buff->skb) {
1168 dev_kfree_skb_any(tx_buff->skb);
1169 tx_buff->skb = NULL;
1170 }
1171 }
1172 }
1173
1174 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1175 {
1176 int tx_scrqs;
1177 int i;
1178
1179 if (!adapter->tx_pool || !adapter->tso_pool)
1180 return;
1181
1182 tx_scrqs = adapter->num_active_tx_pools;
1183
1184 /* Free any remaining skbs in the tx buffer pools */
1185 for (i = 0; i < tx_scrqs; i++) {
1186 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1187 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1188 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1189 }
1190 }
1191
1192 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1193 {
1194 struct net_device *netdev = adapter->netdev;
1195 int i;
1196
1197 if (adapter->tx_scrq) {
1198 for (i = 0; i < adapter->req_tx_queues; i++)
1199 if (adapter->tx_scrq[i]->irq) {
1200 netdev_dbg(netdev,
1201 "Disabling tx_scrq[%d] irq\n", i);
1202 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1203 disable_irq(adapter->tx_scrq[i]->irq);
1204 }
1205 }
1206
1207 if (adapter->rx_scrq) {
1208 for (i = 0; i < adapter->req_rx_queues; i++) {
1209 if (adapter->rx_scrq[i]->irq) {
1210 netdev_dbg(netdev,
1211 "Disabling rx_scrq[%d] irq\n", i);
1212 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1213 disable_irq(adapter->rx_scrq[i]->irq);
1214 }
1215 }
1216 }
1217 }
1218
1219 static void ibmvnic_cleanup(struct net_device *netdev)
1220 {
1221 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1222
1223 /* ensure that transmissions are stopped if called by do_reset */
1224 if (adapter->resetting)
1225 netif_tx_disable(netdev);
1226 else
1227 netif_tx_stop_all_queues(netdev);
1228
1229 ibmvnic_napi_disable(adapter);
1230 ibmvnic_disable_irqs(adapter);
1231
1232 clean_rx_pools(adapter);
1233 clean_tx_pools(adapter);
1234 }
1235
1236 static int __ibmvnic_close(struct net_device *netdev)
1237 {
1238 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1239 int rc = 0;
1240
1241 adapter->state = VNIC_CLOSING;
1242 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1243 if (rc)
1244 return rc;
1245 adapter->state = VNIC_CLOSED;
1246 return 0;
1247 }
1248
1249 static int ibmvnic_close(struct net_device *netdev)
1250 {
1251 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1252 int rc;
1253
1254 /* If device failover is pending, just set device state and return.
1255 * Device operation will be handled by reset routine.
1256 */
1257 if (adapter->failover_pending) {
1258 adapter->state = VNIC_CLOSED;
1259 return 0;
1260 }
1261
1262 rc = __ibmvnic_close(netdev);
1263 ibmvnic_cleanup(netdev);
1264
1265 return rc;
1266 }
1267
1268 /**
1269 * build_hdr_data - creates L2/L3/L4 header data buffer
1270 * @hdr_field - bitfield determining needed headers
1271 * @skb - socket buffer
1272 * @hdr_len - array of header lengths
1273 * @tot_len - total length of data
1274 *
1275 * Reads hdr_field to determine which headers are needed by firmware.
1276 * Builds a buffer containing these headers. Saves individual header
1277 * lengths and total buffer length to be used to build descriptors.
1278 */
1279 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1280 int *hdr_len, u8 *hdr_data)
1281 {
1282 int len = 0;
1283 u8 *hdr;
1284
1285 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1286 hdr_len[0] = sizeof(struct vlan_ethhdr);
1287 else
1288 hdr_len[0] = sizeof(struct ethhdr);
1289
1290 if (skb->protocol == htons(ETH_P_IP)) {
1291 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1292 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1293 hdr_len[2] = tcp_hdrlen(skb);
1294 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1295 hdr_len[2] = sizeof(struct udphdr);
1296 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1297 hdr_len[1] = sizeof(struct ipv6hdr);
1298 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1299 hdr_len[2] = tcp_hdrlen(skb);
1300 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1301 hdr_len[2] = sizeof(struct udphdr);
1302 } else if (skb->protocol == htons(ETH_P_ARP)) {
1303 hdr_len[1] = arp_hdr_len(skb->dev);
1304 hdr_len[2] = 0;
1305 }
1306
1307 memset(hdr_data, 0, 120);
1308 if ((hdr_field >> 6) & 1) {
1309 hdr = skb_mac_header(skb);
1310 memcpy(hdr_data, hdr, hdr_len[0]);
1311 len += hdr_len[0];
1312 }
1313
1314 if ((hdr_field >> 5) & 1) {
1315 hdr = skb_network_header(skb);
1316 memcpy(hdr_data + len, hdr, hdr_len[1]);
1317 len += hdr_len[1];
1318 }
1319
1320 if ((hdr_field >> 4) & 1) {
1321 hdr = skb_transport_header(skb);
1322 memcpy(hdr_data + len, hdr, hdr_len[2]);
1323 len += hdr_len[2];
1324 }
1325 return len;
1326 }
1327
1328 /**
1329 * create_hdr_descs - create header and header extension descriptors
1330 * @hdr_field - bitfield determining needed headers
1331 * @data - buffer containing header data
1332 * @len - length of data buffer
1333 * @hdr_len - array of individual header lengths
1334 * @scrq_arr - descriptor array
1335 *
1336 * Creates header and, if needed, header extension descriptors and
1337 * places them in a descriptor array, scrq_arr
1338 */
1339
1340 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1341 union sub_crq *scrq_arr)
1342 {
1343 union sub_crq hdr_desc;
1344 int tmp_len = len;
1345 int num_descs = 0;
1346 u8 *data, *cur;
1347 int tmp;
1348
1349 while (tmp_len > 0) {
1350 cur = hdr_data + len - tmp_len;
1351
1352 memset(&hdr_desc, 0, sizeof(hdr_desc));
1353 if (cur != hdr_data) {
1354 data = hdr_desc.hdr_ext.data;
1355 tmp = tmp_len > 29 ? 29 : tmp_len;
1356 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1357 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1358 hdr_desc.hdr_ext.len = tmp;
1359 } else {
1360 data = hdr_desc.hdr.data;
1361 tmp = tmp_len > 24 ? 24 : tmp_len;
1362 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1363 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1364 hdr_desc.hdr.len = tmp;
1365 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1366 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1367 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1368 hdr_desc.hdr.flag = hdr_field << 1;
1369 }
1370 memcpy(data, cur, tmp);
1371 tmp_len -= tmp;
1372 *scrq_arr = hdr_desc;
1373 scrq_arr++;
1374 num_descs++;
1375 }
1376
1377 return num_descs;
1378 }
1379
1380 /**
1381 * build_hdr_descs_arr - build a header descriptor array
1382 * @skb - socket buffer
1383 * @num_entries - number of descriptors to be sent
1384 * @subcrq - first TX descriptor
1385 * @hdr_field - bit field determining which headers will be sent
1386 *
1387 * This function will build a TX descriptor array with applicable
1388 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1389 */
1390
1391 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1392 int *num_entries, u8 hdr_field)
1393 {
1394 int hdr_len[3] = {0, 0, 0};
1395 int tot_len;
1396 u8 *hdr_data = txbuff->hdr_data;
1397
1398 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1399 txbuff->hdr_data);
1400 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1401 txbuff->indir_arr + 1);
1402 }
1403
1404 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1405 struct net_device *netdev)
1406 {
1407 /* For some backing devices, mishandling of small packets
1408 * can result in a loss of connection or TX stall. Device
1409 * architects recommend that no packet should be smaller
1410 * than the minimum MTU value provided to the driver, so
1411 * pad any packets to that length
1412 */
1413 if (skb->len < netdev->min_mtu)
1414 return skb_put_padto(skb, netdev->min_mtu);
1415
1416 return 0;
1417 }
1418
1419 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1420 {
1421 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1422 int queue_num = skb_get_queue_mapping(skb);
1423 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1424 struct device *dev = &adapter->vdev->dev;
1425 struct ibmvnic_tx_buff *tx_buff = NULL;
1426 struct ibmvnic_sub_crq_queue *tx_scrq;
1427 struct ibmvnic_tx_pool *tx_pool;
1428 unsigned int tx_send_failed = 0;
1429 unsigned int tx_map_failed = 0;
1430 unsigned int tx_dropped = 0;
1431 unsigned int tx_packets = 0;
1432 unsigned int tx_bytes = 0;
1433 dma_addr_t data_dma_addr;
1434 struct netdev_queue *txq;
1435 unsigned long lpar_rc;
1436 union sub_crq tx_crq;
1437 unsigned int offset;
1438 int num_entries = 1;
1439 unsigned char *dst;
1440 u64 *handle_array;
1441 int index = 0;
1442 u8 proto = 0;
1443 netdev_tx_t ret = NETDEV_TX_OK;
1444
1445 if (adapter->resetting) {
1446 if (!netif_subqueue_stopped(netdev, skb))
1447 netif_stop_subqueue(netdev, queue_num);
1448 dev_kfree_skb_any(skb);
1449
1450 tx_send_failed++;
1451 tx_dropped++;
1452 ret = NETDEV_TX_OK;
1453 goto out;
1454 }
1455
1456 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1457 tx_dropped++;
1458 tx_send_failed++;
1459 ret = NETDEV_TX_OK;
1460 goto out;
1461 }
1462 if (skb_is_gso(skb))
1463 tx_pool = &adapter->tso_pool[queue_num];
1464 else
1465 tx_pool = &adapter->tx_pool[queue_num];
1466
1467 tx_scrq = adapter->tx_scrq[queue_num];
1468 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1469 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1470 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1471
1472 index = tx_pool->free_map[tx_pool->consumer_index];
1473
1474 if (index == IBMVNIC_INVALID_MAP) {
1475 dev_kfree_skb_any(skb);
1476 tx_send_failed++;
1477 tx_dropped++;
1478 ret = NETDEV_TX_OK;
1479 goto out;
1480 }
1481
1482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1483
1484 offset = index * tx_pool->buf_size;
1485 dst = tx_pool->long_term_buff.buff + offset;
1486 memset(dst, 0, tx_pool->buf_size);
1487 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1488
1489 if (skb_shinfo(skb)->nr_frags) {
1490 int cur, i;
1491
1492 /* Copy the head */
1493 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1494 cur = skb_headlen(skb);
1495
1496 /* Copy the frags */
1497 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1498 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1499
1500 memcpy(dst + cur,
1501 page_address(skb_frag_page(frag)) +
1502 frag->page_offset, skb_frag_size(frag));
1503 cur += skb_frag_size(frag);
1504 }
1505 } else {
1506 skb_copy_from_linear_data(skb, dst, skb->len);
1507 }
1508
1509 tx_pool->consumer_index =
1510 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1511
1512 tx_buff = &tx_pool->tx_buff[index];
1513 tx_buff->skb = skb;
1514 tx_buff->data_dma[0] = data_dma_addr;
1515 tx_buff->data_len[0] = skb->len;
1516 tx_buff->index = index;
1517 tx_buff->pool_index = queue_num;
1518 tx_buff->last_frag = true;
1519
1520 memset(&tx_crq, 0, sizeof(tx_crq));
1521 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1522 tx_crq.v1.type = IBMVNIC_TX_DESC;
1523 tx_crq.v1.n_crq_elem = 1;
1524 tx_crq.v1.n_sge = 1;
1525 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1526
1527 if (skb_is_gso(skb))
1528 tx_crq.v1.correlator =
1529 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1530 else
1531 tx_crq.v1.correlator = cpu_to_be32(index);
1532 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1533 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1534 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1535
1536 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1537 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1538 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1539 }
1540
1541 if (skb->protocol == htons(ETH_P_IP)) {
1542 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1543 proto = ip_hdr(skb)->protocol;
1544 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1546 proto = ipv6_hdr(skb)->nexthdr;
1547 }
1548
1549 if (proto == IPPROTO_TCP)
1550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1551 else if (proto == IPPROTO_UDP)
1552 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1553
1554 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1555 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1556 hdrs += 2;
1557 }
1558 if (skb_is_gso(skb)) {
1559 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1560 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1561 hdrs += 2;
1562 }
1563 /* determine if l2/3/4 headers are sent to firmware */
1564 if ((*hdrs >> 7) & 1) {
1565 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1566 tx_crq.v1.n_crq_elem = num_entries;
1567 tx_buff->num_entries = num_entries;
1568 tx_buff->indir_arr[0] = tx_crq;
1569 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1570 sizeof(tx_buff->indir_arr),
1571 DMA_TO_DEVICE);
1572 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1573 dev_kfree_skb_any(skb);
1574 tx_buff->skb = NULL;
1575 if (!firmware_has_feature(FW_FEATURE_CMO))
1576 dev_err(dev, "tx: unable to map descriptor array\n");
1577 tx_map_failed++;
1578 tx_dropped++;
1579 ret = NETDEV_TX_OK;
1580 goto tx_err_out;
1581 }
1582 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1583 (u64)tx_buff->indir_dma,
1584 (u64)num_entries);
1585 } else {
1586 tx_buff->num_entries = num_entries;
1587 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1588 &tx_crq);
1589 }
1590 if (lpar_rc != H_SUCCESS) {
1591 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1592 dev_err_ratelimited(dev, "tx: send failed\n");
1593 dev_kfree_skb_any(skb);
1594 tx_buff->skb = NULL;
1595
1596 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1597 /* Disable TX and report carrier off if queue is closed
1598 * or pending failover.
1599 * Firmware guarantees that a signal will be sent to the
1600 * driver, triggering a reset or some other action.
1601 */
1602 netif_tx_stop_all_queues(netdev);
1603 netif_carrier_off(netdev);
1604 }
1605
1606 tx_send_failed++;
1607 tx_dropped++;
1608 ret = NETDEV_TX_OK;
1609 goto tx_err_out;
1610 }
1611
1612 if (atomic_add_return(num_entries, &tx_scrq->used)
1613 >= adapter->req_tx_entries_per_subcrq) {
1614 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1615 netif_stop_subqueue(netdev, queue_num);
1616 }
1617
1618 tx_packets++;
1619 tx_bytes += skb->len;
1620 txq->trans_start = jiffies;
1621 ret = NETDEV_TX_OK;
1622 goto out;
1623
1624 tx_err_out:
1625 /* roll back consumer index and map array*/
1626 if (tx_pool->consumer_index == 0)
1627 tx_pool->consumer_index =
1628 tx_pool->num_buffers - 1;
1629 else
1630 tx_pool->consumer_index--;
1631 tx_pool->free_map[tx_pool->consumer_index] = index;
1632 out:
1633 netdev->stats.tx_dropped += tx_dropped;
1634 netdev->stats.tx_bytes += tx_bytes;
1635 netdev->stats.tx_packets += tx_packets;
1636 adapter->tx_send_failed += tx_send_failed;
1637 adapter->tx_map_failed += tx_map_failed;
1638 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1639 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1640 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1641
1642 return ret;
1643 }
1644
1645 static void ibmvnic_set_multi(struct net_device *netdev)
1646 {
1647 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1648 struct netdev_hw_addr *ha;
1649 union ibmvnic_crq crq;
1650
1651 memset(&crq, 0, sizeof(crq));
1652 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1653 crq.request_capability.cmd = REQUEST_CAPABILITY;
1654
1655 if (netdev->flags & IFF_PROMISC) {
1656 if (!adapter->promisc_supported)
1657 return;
1658 } else {
1659 if (netdev->flags & IFF_ALLMULTI) {
1660 /* Accept all multicast */
1661 memset(&crq, 0, sizeof(crq));
1662 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1663 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1664 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1665 ibmvnic_send_crq(adapter, &crq);
1666 } else if (netdev_mc_empty(netdev)) {
1667 /* Reject all multicast */
1668 memset(&crq, 0, sizeof(crq));
1669 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1670 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1671 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1672 ibmvnic_send_crq(adapter, &crq);
1673 } else {
1674 /* Accept one or more multicast(s) */
1675 netdev_for_each_mc_addr(ha, netdev) {
1676 memset(&crq, 0, sizeof(crq));
1677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1678 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1679 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1680 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1681 ha->addr);
1682 ibmvnic_send_crq(adapter, &crq);
1683 }
1684 }
1685 }
1686 }
1687
1688 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1689 {
1690 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1691 struct sockaddr *addr = p;
1692 union ibmvnic_crq crq;
1693 int rc;
1694
1695 if (!is_valid_ether_addr(addr->sa_data))
1696 return -EADDRNOTAVAIL;
1697
1698 memset(&crq, 0, sizeof(crq));
1699 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1700 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1701 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1702
1703 init_completion(&adapter->fw_done);
1704 rc = ibmvnic_send_crq(adapter, &crq);
1705 if (rc)
1706 return rc;
1707 wait_for_completion(&adapter->fw_done);
1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1709 return adapter->fw_done_rc ? -EIO : 0;
1710 }
1711
1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1713 {
1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1715 struct sockaddr *addr = p;
1716 int rc;
1717
1718 if (adapter->state == VNIC_PROBED) {
1719 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1720 adapter->mac_change_pending = true;
1721 return 0;
1722 }
1723
1724 rc = __ibmvnic_set_mac(netdev, addr);
1725
1726 return rc;
1727 }
1728
1729 /**
1730 * do_reset returns zero if we are able to keep processing reset events, or
1731 * non-zero if we hit a fatal error and must halt.
1732 */
1733 static int do_reset(struct ibmvnic_adapter *adapter,
1734 struct ibmvnic_rwi *rwi, u32 reset_state)
1735 {
1736 u64 old_num_rx_queues, old_num_tx_queues;
1737 u64 old_num_rx_slots, old_num_tx_slots;
1738 struct net_device *netdev = adapter->netdev;
1739 int i, rc;
1740
1741 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1742 rwi->reset_reason);
1743
1744 netif_carrier_off(netdev);
1745 adapter->reset_reason = rwi->reset_reason;
1746
1747 old_num_rx_queues = adapter->req_rx_queues;
1748 old_num_tx_queues = adapter->req_tx_queues;
1749 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1750 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1751
1752 ibmvnic_cleanup(netdev);
1753
1754 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1755 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1756 rc = __ibmvnic_close(netdev);
1757 if (rc)
1758 return rc;
1759 }
1760
1761 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1762 adapter->wait_for_reset) {
1763 release_resources(adapter);
1764 release_sub_crqs(adapter, 1);
1765 release_crq_queue(adapter);
1766 }
1767
1768 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1769 /* remove the closed state so when we call open it appears
1770 * we are coming from the probed state.
1771 */
1772 adapter->state = VNIC_PROBED;
1773
1774 if (adapter->wait_for_reset) {
1775 rc = init_crq_queue(adapter);
1776 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1777 rc = ibmvnic_reenable_crq_queue(adapter);
1778 release_sub_crqs(adapter, 1);
1779 } else {
1780 rc = ibmvnic_reset_crq(adapter);
1781 if (!rc)
1782 rc = vio_enable_interrupts(adapter->vdev);
1783 }
1784
1785 if (rc) {
1786 netdev_err(adapter->netdev,
1787 "Couldn't initialize crq. rc=%d\n", rc);
1788 return rc;
1789 }
1790
1791 rc = ibmvnic_reset_init(adapter);
1792 if (rc)
1793 return IBMVNIC_INIT_FAILED;
1794
1795 /* If the adapter was in PROBE state prior to the reset,
1796 * exit here.
1797 */
1798 if (reset_state == VNIC_PROBED)
1799 return 0;
1800
1801 rc = ibmvnic_login(netdev);
1802 if (rc) {
1803 adapter->state = reset_state;
1804 return rc;
1805 }
1806
1807 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1808 adapter->wait_for_reset) {
1809 rc = init_resources(adapter);
1810 if (rc)
1811 return rc;
1812 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1813 adapter->req_tx_queues != old_num_tx_queues ||
1814 adapter->req_rx_add_entries_per_subcrq !=
1815 old_num_rx_slots ||
1816 adapter->req_tx_entries_per_subcrq !=
1817 old_num_tx_slots) {
1818 release_rx_pools(adapter);
1819 release_tx_pools(adapter);
1820 release_napi(adapter);
1821 release_vpd_data(adapter);
1822
1823 rc = init_resources(adapter);
1824 if (rc)
1825 return rc;
1826
1827 } else {
1828 rc = reset_tx_pools(adapter);
1829 if (rc)
1830 return rc;
1831
1832 rc = reset_rx_pools(adapter);
1833 if (rc)
1834 return rc;
1835 }
1836 ibmvnic_disable_irqs(adapter);
1837 }
1838 adapter->state = VNIC_CLOSED;
1839
1840 if (reset_state == VNIC_CLOSED)
1841 return 0;
1842
1843 rc = __ibmvnic_open(netdev);
1844 if (rc) {
1845 if (list_empty(&adapter->rwi_list))
1846 adapter->state = VNIC_CLOSED;
1847 else
1848 adapter->state = reset_state;
1849
1850 return 0;
1851 }
1852
1853 /* kick napi */
1854 for (i = 0; i < adapter->req_rx_queues; i++)
1855 napi_schedule(&adapter->napi[i]);
1856
1857 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1858 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1859 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1860
1861 netif_carrier_on(netdev);
1862
1863 return 0;
1864 }
1865
1866 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1867 struct ibmvnic_rwi *rwi, u32 reset_state)
1868 {
1869 struct net_device *netdev = adapter->netdev;
1870 int rc;
1871
1872 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1873 rwi->reset_reason);
1874
1875 netif_carrier_off(netdev);
1876 adapter->reset_reason = rwi->reset_reason;
1877
1878 ibmvnic_cleanup(netdev);
1879 release_resources(adapter);
1880 release_sub_crqs(adapter, 0);
1881 release_crq_queue(adapter);
1882
1883 /* remove the closed state so when we call open it appears
1884 * we are coming from the probed state.
1885 */
1886 adapter->state = VNIC_PROBED;
1887
1888 reinit_completion(&adapter->init_done);
1889 rc = init_crq_queue(adapter);
1890 if (rc) {
1891 netdev_err(adapter->netdev,
1892 "Couldn't initialize crq. rc=%d\n", rc);
1893 return rc;
1894 }
1895
1896 rc = ibmvnic_init(adapter);
1897 if (rc)
1898 return rc;
1899
1900 /* If the adapter was in PROBE state prior to the reset,
1901 * exit here.
1902 */
1903 if (reset_state == VNIC_PROBED)
1904 return 0;
1905
1906 rc = ibmvnic_login(netdev);
1907 if (rc) {
1908 adapter->state = VNIC_PROBED;
1909 return 0;
1910 }
1911
1912 rc = init_resources(adapter);
1913 if (rc)
1914 return rc;
1915
1916 ibmvnic_disable_irqs(adapter);
1917 adapter->state = VNIC_CLOSED;
1918
1919 if (reset_state == VNIC_CLOSED)
1920 return 0;
1921
1922 rc = __ibmvnic_open(netdev);
1923 if (rc) {
1924 if (list_empty(&adapter->rwi_list))
1925 adapter->state = VNIC_CLOSED;
1926 else
1927 adapter->state = reset_state;
1928
1929 return 0;
1930 }
1931
1932 netif_carrier_on(netdev);
1933
1934 return 0;
1935 }
1936
1937 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1938 {
1939 struct ibmvnic_rwi *rwi;
1940 unsigned long flags;
1941
1942 spin_lock_irqsave(&adapter->rwi_lock, flags);
1943
1944 if (!list_empty(&adapter->rwi_list)) {
1945 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1946 list);
1947 list_del(&rwi->list);
1948 } else {
1949 rwi = NULL;
1950 }
1951
1952 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1953 return rwi;
1954 }
1955
1956 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1957 {
1958 struct ibmvnic_rwi *rwi;
1959
1960 rwi = get_next_rwi(adapter);
1961 while (rwi) {
1962 kfree(rwi);
1963 rwi = get_next_rwi(adapter);
1964 }
1965 }
1966
1967 static void __ibmvnic_reset(struct work_struct *work)
1968 {
1969 struct ibmvnic_rwi *rwi;
1970 struct ibmvnic_adapter *adapter;
1971 struct net_device *netdev;
1972 bool we_lock_rtnl = false;
1973 u32 reset_state;
1974 int rc = 0;
1975
1976 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1977 netdev = adapter->netdev;
1978
1979 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1980 * unless wait_for_reset is set, in which case the rtnl lock
1981 * has already been taken before initializing the reset
1982 */
1983 if (!adapter->wait_for_reset) {
1984 rtnl_lock();
1985 we_lock_rtnl = true;
1986 }
1987 reset_state = adapter->state;
1988
1989 rwi = get_next_rwi(adapter);
1990 while (rwi) {
1991 if (adapter->force_reset_recovery) {
1992 adapter->force_reset_recovery = false;
1993 rc = do_hard_reset(adapter, rwi, reset_state);
1994 } else {
1995 rc = do_reset(adapter, rwi, reset_state);
1996 }
1997 kfree(rwi);
1998 if (rc && rc != IBMVNIC_INIT_FAILED &&
1999 !adapter->force_reset_recovery)
2000 break;
2001
2002 rwi = get_next_rwi(adapter);
2003 }
2004
2005 if (adapter->wait_for_reset) {
2006 adapter->wait_for_reset = false;
2007 adapter->reset_done_rc = rc;
2008 complete(&adapter->reset_done);
2009 }
2010
2011 if (rc) {
2012 netdev_dbg(adapter->netdev, "Reset failed\n");
2013 free_all_rwi(adapter);
2014 }
2015
2016 adapter->resetting = false;
2017 if (we_lock_rtnl)
2018 rtnl_unlock();
2019 }
2020
2021 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2022 enum ibmvnic_reset_reason reason)
2023 {
2024 struct list_head *entry, *tmp_entry;
2025 struct ibmvnic_rwi *rwi, *tmp;
2026 struct net_device *netdev = adapter->netdev;
2027 unsigned long flags;
2028 int ret;
2029
2030 if (adapter->state == VNIC_REMOVING ||
2031 adapter->state == VNIC_REMOVED ||
2032 adapter->failover_pending) {
2033 ret = EBUSY;
2034 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2035 goto err;
2036 }
2037
2038 if (adapter->state == VNIC_PROBING) {
2039 netdev_warn(netdev, "Adapter reset during probe\n");
2040 ret = adapter->init_done_rc = EAGAIN;
2041 goto err;
2042 }
2043
2044 spin_lock_irqsave(&adapter->rwi_lock, flags);
2045
2046 list_for_each(entry, &adapter->rwi_list) {
2047 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2048 if (tmp->reset_reason == reason) {
2049 netdev_dbg(netdev, "Skipping matching reset\n");
2050 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2051 ret = EBUSY;
2052 goto err;
2053 }
2054 }
2055
2056 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2057 if (!rwi) {
2058 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2059 ibmvnic_close(netdev);
2060 ret = ENOMEM;
2061 goto err;
2062 }
2063 /* if we just received a transport event,
2064 * flush reset queue and process this reset
2065 */
2066 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2067 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2068 list_del(entry);
2069 }
2070 rwi->reset_reason = reason;
2071 list_add_tail(&rwi->list, &adapter->rwi_list);
2072 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2073 adapter->resetting = true;
2074 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2075 schedule_work(&adapter->ibmvnic_reset);
2076
2077 return 0;
2078 err:
2079 if (adapter->wait_for_reset)
2080 adapter->wait_for_reset = false;
2081 return -ret;
2082 }
2083
2084 static void ibmvnic_tx_timeout(struct net_device *dev)
2085 {
2086 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087
2088 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2089 }
2090
2091 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2092 struct ibmvnic_rx_buff *rx_buff)
2093 {
2094 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2095
2096 rx_buff->skb = NULL;
2097
2098 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2099 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2100
2101 atomic_dec(&pool->available);
2102 }
2103
2104 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2105 {
2106 struct net_device *netdev = napi->dev;
2107 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2108 int scrq_num = (int)(napi - adapter->napi);
2109 int frames_processed = 0;
2110
2111 restart_poll:
2112 while (frames_processed < budget) {
2113 struct sk_buff *skb;
2114 struct ibmvnic_rx_buff *rx_buff;
2115 union sub_crq *next;
2116 u32 length;
2117 u16 offset;
2118 u8 flags = 0;
2119
2120 if (unlikely(adapter->resetting &&
2121 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2122 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2123 napi_complete_done(napi, frames_processed);
2124 return frames_processed;
2125 }
2126
2127 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2128 break;
2129 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2130 rx_buff =
2131 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2132 rx_comp.correlator);
2133 /* do error checking */
2134 if (next->rx_comp.rc) {
2135 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2136 be16_to_cpu(next->rx_comp.rc));
2137 /* free the entry */
2138 next->rx_comp.first = 0;
2139 dev_kfree_skb_any(rx_buff->skb);
2140 remove_buff_from_pool(adapter, rx_buff);
2141 continue;
2142 } else if (!rx_buff->skb) {
2143 /* free the entry */
2144 next->rx_comp.first = 0;
2145 remove_buff_from_pool(adapter, rx_buff);
2146 continue;
2147 }
2148
2149 length = be32_to_cpu(next->rx_comp.len);
2150 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2151 flags = next->rx_comp.flags;
2152 skb = rx_buff->skb;
2153 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2154 length);
2155
2156 /* VLAN Header has been stripped by the system firmware and
2157 * needs to be inserted by the driver
2158 */
2159 if (adapter->rx_vlan_header_insertion &&
2160 (flags & IBMVNIC_VLAN_STRIPPED))
2161 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2162 ntohs(next->rx_comp.vlan_tci));
2163
2164 /* free the entry */
2165 next->rx_comp.first = 0;
2166 remove_buff_from_pool(adapter, rx_buff);
2167
2168 skb_put(skb, length);
2169 skb->protocol = eth_type_trans(skb, netdev);
2170 skb_record_rx_queue(skb, scrq_num);
2171
2172 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2173 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2174 skb->ip_summed = CHECKSUM_UNNECESSARY;
2175 }
2176
2177 length = skb->len;
2178 napi_gro_receive(napi, skb); /* send it up */
2179 netdev->stats.rx_packets++;
2180 netdev->stats.rx_bytes += length;
2181 adapter->rx_stats_buffers[scrq_num].packets++;
2182 adapter->rx_stats_buffers[scrq_num].bytes += length;
2183 frames_processed++;
2184 }
2185
2186 if (adapter->state != VNIC_CLOSING)
2187 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2188
2189 if (frames_processed < budget) {
2190 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2191 napi_complete_done(napi, frames_processed);
2192 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2193 napi_reschedule(napi)) {
2194 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2195 goto restart_poll;
2196 }
2197 }
2198 return frames_processed;
2199 }
2200
2201 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2202 {
2203 int rc, ret;
2204
2205 adapter->fallback.mtu = adapter->req_mtu;
2206 adapter->fallback.rx_queues = adapter->req_rx_queues;
2207 adapter->fallback.tx_queues = adapter->req_tx_queues;
2208 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2209 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2210
2211 init_completion(&adapter->reset_done);
2212 adapter->wait_for_reset = true;
2213 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2214 if (rc)
2215 return rc;
2216 wait_for_completion(&adapter->reset_done);
2217
2218 ret = 0;
2219 if (adapter->reset_done_rc) {
2220 ret = -EIO;
2221 adapter->desired.mtu = adapter->fallback.mtu;
2222 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2223 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2224 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2225 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2226
2227 init_completion(&adapter->reset_done);
2228 adapter->wait_for_reset = true;
2229 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2230 if (rc)
2231 return ret;
2232 wait_for_completion(&adapter->reset_done);
2233 }
2234 adapter->wait_for_reset = false;
2235
2236 return ret;
2237 }
2238
2239 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2240 {
2241 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2242
2243 adapter->desired.mtu = new_mtu + ETH_HLEN;
2244
2245 return wait_for_reset(adapter);
2246 }
2247
2248 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2249 struct net_device *dev,
2250 netdev_features_t features)
2251 {
2252 /* Some backing hardware adapters can not
2253 * handle packets with a MSS less than 224
2254 * or with only one segment.
2255 */
2256 if (skb_is_gso(skb)) {
2257 if (skb_shinfo(skb)->gso_size < 224 ||
2258 skb_shinfo(skb)->gso_segs == 1)
2259 features &= ~NETIF_F_GSO_MASK;
2260 }
2261
2262 return features;
2263 }
2264
2265 static const struct net_device_ops ibmvnic_netdev_ops = {
2266 .ndo_open = ibmvnic_open,
2267 .ndo_stop = ibmvnic_close,
2268 .ndo_start_xmit = ibmvnic_xmit,
2269 .ndo_set_rx_mode = ibmvnic_set_multi,
2270 .ndo_set_mac_address = ibmvnic_set_mac,
2271 .ndo_validate_addr = eth_validate_addr,
2272 .ndo_tx_timeout = ibmvnic_tx_timeout,
2273 .ndo_change_mtu = ibmvnic_change_mtu,
2274 .ndo_features_check = ibmvnic_features_check,
2275 };
2276
2277 /* ethtool functions */
2278
2279 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2280 struct ethtool_link_ksettings *cmd)
2281 {
2282 u32 supported, advertising;
2283
2284 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2285 SUPPORTED_FIBRE);
2286 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2287 ADVERTISED_FIBRE);
2288 cmd->base.speed = SPEED_1000;
2289 cmd->base.duplex = DUPLEX_FULL;
2290 cmd->base.port = PORT_FIBRE;
2291 cmd->base.phy_address = 0;
2292 cmd->base.autoneg = AUTONEG_ENABLE;
2293
2294 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2295 supported);
2296 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2297 advertising);
2298
2299 return 0;
2300 }
2301
2302 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2303 struct ethtool_drvinfo *info)
2304 {
2305 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2306
2307 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2308 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2309 strlcpy(info->fw_version, adapter->fw_version,
2310 sizeof(info->fw_version));
2311 }
2312
2313 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2314 {
2315 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2316
2317 return adapter->msg_enable;
2318 }
2319
2320 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2321 {
2322 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2323
2324 adapter->msg_enable = data;
2325 }
2326
2327 static u32 ibmvnic_get_link(struct net_device *netdev)
2328 {
2329 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2330
2331 /* Don't need to send a query because we request a logical link up at
2332 * init and then we wait for link state indications
2333 */
2334 return adapter->logical_link_state;
2335 }
2336
2337 static void ibmvnic_get_ringparam(struct net_device *netdev,
2338 struct ethtool_ringparam *ring)
2339 {
2340 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2341
2342 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2343 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2344 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2345 } else {
2346 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2347 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2348 }
2349 ring->rx_mini_max_pending = 0;
2350 ring->rx_jumbo_max_pending = 0;
2351 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2352 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2353 ring->rx_mini_pending = 0;
2354 ring->rx_jumbo_pending = 0;
2355 }
2356
2357 static int ibmvnic_set_ringparam(struct net_device *netdev,
2358 struct ethtool_ringparam *ring)
2359 {
2360 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2361 int ret;
2362
2363 ret = 0;
2364 adapter->desired.rx_entries = ring->rx_pending;
2365 adapter->desired.tx_entries = ring->tx_pending;
2366
2367 ret = wait_for_reset(adapter);
2368
2369 if (!ret &&
2370 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2371 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2372 netdev_info(netdev,
2373 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2374 ring->rx_pending, ring->tx_pending,
2375 adapter->req_rx_add_entries_per_subcrq,
2376 adapter->req_tx_entries_per_subcrq);
2377 return ret;
2378 }
2379
2380 static void ibmvnic_get_channels(struct net_device *netdev,
2381 struct ethtool_channels *channels)
2382 {
2383 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2384
2385 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2386 channels->max_rx = adapter->max_rx_queues;
2387 channels->max_tx = adapter->max_tx_queues;
2388 } else {
2389 channels->max_rx = IBMVNIC_MAX_QUEUES;
2390 channels->max_tx = IBMVNIC_MAX_QUEUES;
2391 }
2392
2393 channels->max_other = 0;
2394 channels->max_combined = 0;
2395 channels->rx_count = adapter->req_rx_queues;
2396 channels->tx_count = adapter->req_tx_queues;
2397 channels->other_count = 0;
2398 channels->combined_count = 0;
2399 }
2400
2401 static int ibmvnic_set_channels(struct net_device *netdev,
2402 struct ethtool_channels *channels)
2403 {
2404 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2405 int ret;
2406
2407 ret = 0;
2408 adapter->desired.rx_queues = channels->rx_count;
2409 adapter->desired.tx_queues = channels->tx_count;
2410
2411 ret = wait_for_reset(adapter);
2412
2413 if (!ret &&
2414 (adapter->req_rx_queues != channels->rx_count ||
2415 adapter->req_tx_queues != channels->tx_count))
2416 netdev_info(netdev,
2417 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2418 channels->rx_count, channels->tx_count,
2419 adapter->req_rx_queues, adapter->req_tx_queues);
2420 return ret;
2421
2422 }
2423
2424 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2425 {
2426 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2427 int i;
2428
2429 switch (stringset) {
2430 case ETH_SS_STATS:
2431 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2432 i++, data += ETH_GSTRING_LEN)
2433 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2434
2435 for (i = 0; i < adapter->req_tx_queues; i++) {
2436 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2437 data += ETH_GSTRING_LEN;
2438
2439 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2440 data += ETH_GSTRING_LEN;
2441
2442 snprintf(data, ETH_GSTRING_LEN,
2443 "tx%d_dropped_packets", i);
2444 data += ETH_GSTRING_LEN;
2445 }
2446
2447 for (i = 0; i < adapter->req_rx_queues; i++) {
2448 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2449 data += ETH_GSTRING_LEN;
2450
2451 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2452 data += ETH_GSTRING_LEN;
2453
2454 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2455 data += ETH_GSTRING_LEN;
2456 }
2457 break;
2458
2459 case ETH_SS_PRIV_FLAGS:
2460 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2461 strcpy(data + i * ETH_GSTRING_LEN,
2462 ibmvnic_priv_flags[i]);
2463 break;
2464 default:
2465 return;
2466 }
2467 }
2468
2469 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2470 {
2471 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2472
2473 switch (sset) {
2474 case ETH_SS_STATS:
2475 return ARRAY_SIZE(ibmvnic_stats) +
2476 adapter->req_tx_queues * NUM_TX_STATS +
2477 adapter->req_rx_queues * NUM_RX_STATS;
2478 case ETH_SS_PRIV_FLAGS:
2479 return ARRAY_SIZE(ibmvnic_priv_flags);
2480 default:
2481 return -EOPNOTSUPP;
2482 }
2483 }
2484
2485 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2486 struct ethtool_stats *stats, u64 *data)
2487 {
2488 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2489 union ibmvnic_crq crq;
2490 int i, j;
2491 int rc;
2492
2493 memset(&crq, 0, sizeof(crq));
2494 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2495 crq.request_statistics.cmd = REQUEST_STATISTICS;
2496 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2497 crq.request_statistics.len =
2498 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2499
2500 /* Wait for data to be written */
2501 init_completion(&adapter->stats_done);
2502 rc = ibmvnic_send_crq(adapter, &crq);
2503 if (rc)
2504 return;
2505 wait_for_completion(&adapter->stats_done);
2506
2507 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2508 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2509 ibmvnic_stats[i].offset));
2510
2511 for (j = 0; j < adapter->req_tx_queues; j++) {
2512 data[i] = adapter->tx_stats_buffers[j].packets;
2513 i++;
2514 data[i] = adapter->tx_stats_buffers[j].bytes;
2515 i++;
2516 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2517 i++;
2518 }
2519
2520 for (j = 0; j < adapter->req_rx_queues; j++) {
2521 data[i] = adapter->rx_stats_buffers[j].packets;
2522 i++;
2523 data[i] = adapter->rx_stats_buffers[j].bytes;
2524 i++;
2525 data[i] = adapter->rx_stats_buffers[j].interrupts;
2526 i++;
2527 }
2528 }
2529
2530 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2531 {
2532 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2533
2534 return adapter->priv_flags;
2535 }
2536
2537 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2538 {
2539 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2540 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2541
2542 if (which_maxes)
2543 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2544 else
2545 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2546
2547 return 0;
2548 }
2549 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2550 .get_drvinfo = ibmvnic_get_drvinfo,
2551 .get_msglevel = ibmvnic_get_msglevel,
2552 .set_msglevel = ibmvnic_set_msglevel,
2553 .get_link = ibmvnic_get_link,
2554 .get_ringparam = ibmvnic_get_ringparam,
2555 .set_ringparam = ibmvnic_set_ringparam,
2556 .get_channels = ibmvnic_get_channels,
2557 .set_channels = ibmvnic_set_channels,
2558 .get_strings = ibmvnic_get_strings,
2559 .get_sset_count = ibmvnic_get_sset_count,
2560 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2561 .get_link_ksettings = ibmvnic_get_link_ksettings,
2562 .get_priv_flags = ibmvnic_get_priv_flags,
2563 .set_priv_flags = ibmvnic_set_priv_flags,
2564 };
2565
2566 /* Routines for managing CRQs/sCRQs */
2567
2568 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2569 struct ibmvnic_sub_crq_queue *scrq)
2570 {
2571 int rc;
2572
2573 if (scrq->irq) {
2574 free_irq(scrq->irq, scrq);
2575 irq_dispose_mapping(scrq->irq);
2576 scrq->irq = 0;
2577 }
2578
2579 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2580 atomic_set(&scrq->used, 0);
2581 scrq->cur = 0;
2582
2583 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2584 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2585 return rc;
2586 }
2587
2588 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2589 {
2590 int i, rc;
2591
2592 for (i = 0; i < adapter->req_tx_queues; i++) {
2593 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2594 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2595 if (rc)
2596 return rc;
2597 }
2598
2599 for (i = 0; i < adapter->req_rx_queues; i++) {
2600 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2601 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2602 if (rc)
2603 return rc;
2604 }
2605
2606 return rc;
2607 }
2608
2609 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2610 struct ibmvnic_sub_crq_queue *scrq,
2611 bool do_h_free)
2612 {
2613 struct device *dev = &adapter->vdev->dev;
2614 long rc;
2615
2616 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2617
2618 if (do_h_free) {
2619 /* Close the sub-crqs */
2620 do {
2621 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2622 adapter->vdev->unit_address,
2623 scrq->crq_num);
2624 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2625
2626 if (rc) {
2627 netdev_err(adapter->netdev,
2628 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2629 scrq->crq_num, rc);
2630 }
2631 }
2632
2633 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2634 DMA_BIDIRECTIONAL);
2635 free_pages((unsigned long)scrq->msgs, 2);
2636 kfree(scrq);
2637 }
2638
2639 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2640 *adapter)
2641 {
2642 struct device *dev = &adapter->vdev->dev;
2643 struct ibmvnic_sub_crq_queue *scrq;
2644 int rc;
2645
2646 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2647 if (!scrq)
2648 return NULL;
2649
2650 scrq->msgs =
2651 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2652 if (!scrq->msgs) {
2653 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2654 goto zero_page_failed;
2655 }
2656
2657 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2658 DMA_BIDIRECTIONAL);
2659 if (dma_mapping_error(dev, scrq->msg_token)) {
2660 dev_warn(dev, "Couldn't map crq queue messages page\n");
2661 goto map_failed;
2662 }
2663
2664 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2665 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2666
2667 if (rc == H_RESOURCE)
2668 rc = ibmvnic_reset_crq(adapter);
2669
2670 if (rc == H_CLOSED) {
2671 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2672 } else if (rc) {
2673 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2674 goto reg_failed;
2675 }
2676
2677 scrq->adapter = adapter;
2678 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2679 spin_lock_init(&scrq->lock);
2680
2681 netdev_dbg(adapter->netdev,
2682 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2683 scrq->crq_num, scrq->hw_irq, scrq->irq);
2684
2685 return scrq;
2686
2687 reg_failed:
2688 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2689 DMA_BIDIRECTIONAL);
2690 map_failed:
2691 free_pages((unsigned long)scrq->msgs, 2);
2692 zero_page_failed:
2693 kfree(scrq);
2694
2695 return NULL;
2696 }
2697
2698 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2699 {
2700 int i;
2701
2702 if (adapter->tx_scrq) {
2703 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2704 if (!adapter->tx_scrq[i])
2705 continue;
2706
2707 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2708 i);
2709 if (adapter->tx_scrq[i]->irq) {
2710 free_irq(adapter->tx_scrq[i]->irq,
2711 adapter->tx_scrq[i]);
2712 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2713 adapter->tx_scrq[i]->irq = 0;
2714 }
2715
2716 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2717 do_h_free);
2718 }
2719
2720 kfree(adapter->tx_scrq);
2721 adapter->tx_scrq = NULL;
2722 adapter->num_active_tx_scrqs = 0;
2723 }
2724
2725 if (adapter->rx_scrq) {
2726 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2727 if (!adapter->rx_scrq[i])
2728 continue;
2729
2730 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2731 i);
2732 if (adapter->rx_scrq[i]->irq) {
2733 free_irq(adapter->rx_scrq[i]->irq,
2734 adapter->rx_scrq[i]);
2735 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2736 adapter->rx_scrq[i]->irq = 0;
2737 }
2738
2739 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2740 do_h_free);
2741 }
2742
2743 kfree(adapter->rx_scrq);
2744 adapter->rx_scrq = NULL;
2745 adapter->num_active_rx_scrqs = 0;
2746 }
2747 }
2748
2749 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2750 struct ibmvnic_sub_crq_queue *scrq)
2751 {
2752 struct device *dev = &adapter->vdev->dev;
2753 unsigned long rc;
2754
2755 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2756 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2757 if (rc)
2758 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2759 scrq->hw_irq, rc);
2760 return rc;
2761 }
2762
2763 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2764 struct ibmvnic_sub_crq_queue *scrq)
2765 {
2766 struct device *dev = &adapter->vdev->dev;
2767 unsigned long rc;
2768
2769 if (scrq->hw_irq > 0x100000000ULL) {
2770 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2771 return 1;
2772 }
2773
2774 if (adapter->resetting &&
2775 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2776 u64 val = (0xff000000) | scrq->hw_irq;
2777
2778 rc = plpar_hcall_norets(H_EOI, val);
2779 if (rc)
2780 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2781 val, rc);
2782 }
2783
2784 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2785 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2786 if (rc)
2787 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2788 scrq->hw_irq, rc);
2789 return rc;
2790 }
2791
2792 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2793 struct ibmvnic_sub_crq_queue *scrq)
2794 {
2795 struct device *dev = &adapter->vdev->dev;
2796 struct ibmvnic_tx_pool *tx_pool;
2797 struct ibmvnic_tx_buff *txbuff;
2798 union sub_crq *next;
2799 int index;
2800 int i, j;
2801 u8 *first;
2802
2803 restart_loop:
2804 while (pending_scrq(adapter, scrq)) {
2805 unsigned int pool = scrq->pool_index;
2806 int num_entries = 0;
2807
2808 next = ibmvnic_next_scrq(adapter, scrq);
2809 for (i = 0; i < next->tx_comp.num_comps; i++) {
2810 if (next->tx_comp.rcs[i]) {
2811 dev_err(dev, "tx error %x\n",
2812 next->tx_comp.rcs[i]);
2813 continue;
2814 }
2815 index = be32_to_cpu(next->tx_comp.correlators[i]);
2816 if (index & IBMVNIC_TSO_POOL_MASK) {
2817 tx_pool = &adapter->tso_pool[pool];
2818 index &= ~IBMVNIC_TSO_POOL_MASK;
2819 } else {
2820 tx_pool = &adapter->tx_pool[pool];
2821 }
2822
2823 txbuff = &tx_pool->tx_buff[index];
2824
2825 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2826 if (!txbuff->data_dma[j])
2827 continue;
2828
2829 txbuff->data_dma[j] = 0;
2830 }
2831 /* if sub_crq was sent indirectly */
2832 first = &txbuff->indir_arr[0].generic.first;
2833 if (*first == IBMVNIC_CRQ_CMD) {
2834 dma_unmap_single(dev, txbuff->indir_dma,
2835 sizeof(txbuff->indir_arr),
2836 DMA_TO_DEVICE);
2837 *first = 0;
2838 }
2839
2840 if (txbuff->last_frag) {
2841 dev_kfree_skb_any(txbuff->skb);
2842 txbuff->skb = NULL;
2843 }
2844
2845 num_entries += txbuff->num_entries;
2846
2847 tx_pool->free_map[tx_pool->producer_index] = index;
2848 tx_pool->producer_index =
2849 (tx_pool->producer_index + 1) %
2850 tx_pool->num_buffers;
2851 }
2852 /* remove tx_comp scrq*/
2853 next->tx_comp.first = 0;
2854
2855 if (atomic_sub_return(num_entries, &scrq->used) <=
2856 (adapter->req_tx_entries_per_subcrq / 2) &&
2857 __netif_subqueue_stopped(adapter->netdev,
2858 scrq->pool_index)) {
2859 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2860 netdev_dbg(adapter->netdev, "Started queue %d\n",
2861 scrq->pool_index);
2862 }
2863 }
2864
2865 enable_scrq_irq(adapter, scrq);
2866
2867 if (pending_scrq(adapter, scrq)) {
2868 disable_scrq_irq(adapter, scrq);
2869 goto restart_loop;
2870 }
2871
2872 return 0;
2873 }
2874
2875 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2876 {
2877 struct ibmvnic_sub_crq_queue *scrq = instance;
2878 struct ibmvnic_adapter *adapter = scrq->adapter;
2879
2880 disable_scrq_irq(adapter, scrq);
2881 ibmvnic_complete_tx(adapter, scrq);
2882
2883 return IRQ_HANDLED;
2884 }
2885
2886 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2887 {
2888 struct ibmvnic_sub_crq_queue *scrq = instance;
2889 struct ibmvnic_adapter *adapter = scrq->adapter;
2890
2891 /* When booting a kdump kernel we can hit pending interrupts
2892 * prior to completing driver initialization.
2893 */
2894 if (unlikely(adapter->state != VNIC_OPEN))
2895 return IRQ_NONE;
2896
2897 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2898
2899 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2900 disable_scrq_irq(adapter, scrq);
2901 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2902 }
2903
2904 return IRQ_HANDLED;
2905 }
2906
2907 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2908 {
2909 struct device *dev = &adapter->vdev->dev;
2910 struct ibmvnic_sub_crq_queue *scrq;
2911 int i = 0, j = 0;
2912 int rc = 0;
2913
2914 for (i = 0; i < adapter->req_tx_queues; i++) {
2915 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2916 i);
2917 scrq = adapter->tx_scrq[i];
2918 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2919
2920 if (!scrq->irq) {
2921 rc = -EINVAL;
2922 dev_err(dev, "Error mapping irq\n");
2923 goto req_tx_irq_failed;
2924 }
2925
2926 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2927 0, "ibmvnic_tx", scrq);
2928
2929 if (rc) {
2930 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2931 scrq->irq, rc);
2932 irq_dispose_mapping(scrq->irq);
2933 goto req_tx_irq_failed;
2934 }
2935 }
2936
2937 for (i = 0; i < adapter->req_rx_queues; i++) {
2938 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2939 i);
2940 scrq = adapter->rx_scrq[i];
2941 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2942 if (!scrq->irq) {
2943 rc = -EINVAL;
2944 dev_err(dev, "Error mapping irq\n");
2945 goto req_rx_irq_failed;
2946 }
2947 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2948 0, "ibmvnic_rx", scrq);
2949 if (rc) {
2950 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2951 scrq->irq, rc);
2952 irq_dispose_mapping(scrq->irq);
2953 goto req_rx_irq_failed;
2954 }
2955 }
2956 return rc;
2957
2958 req_rx_irq_failed:
2959 for (j = 0; j < i; j++) {
2960 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2961 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2962 }
2963 i = adapter->req_tx_queues;
2964 req_tx_irq_failed:
2965 for (j = 0; j < i; j++) {
2966 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2967 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2968 }
2969 release_sub_crqs(adapter, 1);
2970 return rc;
2971 }
2972
2973 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2974 {
2975 struct device *dev = &adapter->vdev->dev;
2976 struct ibmvnic_sub_crq_queue **allqueues;
2977 int registered_queues = 0;
2978 int total_queues;
2979 int more = 0;
2980 int i;
2981
2982 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2983
2984 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2985 if (!allqueues)
2986 return -1;
2987
2988 for (i = 0; i < total_queues; i++) {
2989 allqueues[i] = init_sub_crq_queue(adapter);
2990 if (!allqueues[i]) {
2991 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2992 break;
2993 }
2994 registered_queues++;
2995 }
2996
2997 /* Make sure we were able to register the minimum number of queues */
2998 if (registered_queues <
2999 adapter->min_tx_queues + adapter->min_rx_queues) {
3000 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3001 goto tx_failed;
3002 }
3003
3004 /* Distribute the failed allocated queues*/
3005 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3006 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3007 switch (i % 3) {
3008 case 0:
3009 if (adapter->req_rx_queues > adapter->min_rx_queues)
3010 adapter->req_rx_queues--;
3011 else
3012 more++;
3013 break;
3014 case 1:
3015 if (adapter->req_tx_queues > adapter->min_tx_queues)
3016 adapter->req_tx_queues--;
3017 else
3018 more++;
3019 break;
3020 }
3021 }
3022
3023 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3024 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3025 if (!adapter->tx_scrq)
3026 goto tx_failed;
3027
3028 for (i = 0; i < adapter->req_tx_queues; i++) {
3029 adapter->tx_scrq[i] = allqueues[i];
3030 adapter->tx_scrq[i]->pool_index = i;
3031 adapter->num_active_tx_scrqs++;
3032 }
3033
3034 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3035 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3036 if (!adapter->rx_scrq)
3037 goto rx_failed;
3038
3039 for (i = 0; i < adapter->req_rx_queues; i++) {
3040 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3041 adapter->rx_scrq[i]->scrq_num = i;
3042 adapter->num_active_rx_scrqs++;
3043 }
3044
3045 kfree(allqueues);
3046 return 0;
3047
3048 rx_failed:
3049 kfree(adapter->tx_scrq);
3050 adapter->tx_scrq = NULL;
3051 tx_failed:
3052 for (i = 0; i < registered_queues; i++)
3053 release_sub_crq_queue(adapter, allqueues[i], 1);
3054 kfree(allqueues);
3055 return -1;
3056 }
3057
3058 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3059 {
3060 struct device *dev = &adapter->vdev->dev;
3061 union ibmvnic_crq crq;
3062 int max_entries;
3063
3064 if (!retry) {
3065 /* Sub-CRQ entries are 32 byte long */
3066 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3067
3068 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3069 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3070 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3071 return;
3072 }
3073
3074 if (adapter->desired.mtu)
3075 adapter->req_mtu = adapter->desired.mtu;
3076 else
3077 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3078
3079 if (!adapter->desired.tx_entries)
3080 adapter->desired.tx_entries =
3081 adapter->max_tx_entries_per_subcrq;
3082 if (!adapter->desired.rx_entries)
3083 adapter->desired.rx_entries =
3084 adapter->max_rx_add_entries_per_subcrq;
3085
3086 max_entries = IBMVNIC_MAX_LTB_SIZE /
3087 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3088
3089 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3090 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3091 adapter->desired.tx_entries = max_entries;
3092 }
3093
3094 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3095 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3096 adapter->desired.rx_entries = max_entries;
3097 }
3098
3099 if (adapter->desired.tx_entries)
3100 adapter->req_tx_entries_per_subcrq =
3101 adapter->desired.tx_entries;
3102 else
3103 adapter->req_tx_entries_per_subcrq =
3104 adapter->max_tx_entries_per_subcrq;
3105
3106 if (adapter->desired.rx_entries)
3107 adapter->req_rx_add_entries_per_subcrq =
3108 adapter->desired.rx_entries;
3109 else
3110 adapter->req_rx_add_entries_per_subcrq =
3111 adapter->max_rx_add_entries_per_subcrq;
3112
3113 if (adapter->desired.tx_queues)
3114 adapter->req_tx_queues =
3115 adapter->desired.tx_queues;
3116 else
3117 adapter->req_tx_queues =
3118 adapter->opt_tx_comp_sub_queues;
3119
3120 if (adapter->desired.rx_queues)
3121 adapter->req_rx_queues =
3122 adapter->desired.rx_queues;
3123 else
3124 adapter->req_rx_queues =
3125 adapter->opt_rx_comp_queues;
3126
3127 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3128 }
3129
3130 memset(&crq, 0, sizeof(crq));
3131 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3132 crq.request_capability.cmd = REQUEST_CAPABILITY;
3133
3134 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3135 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3136 atomic_inc(&adapter->running_cap_crqs);
3137 ibmvnic_send_crq(adapter, &crq);
3138
3139 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3140 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3141 atomic_inc(&adapter->running_cap_crqs);
3142 ibmvnic_send_crq(adapter, &crq);
3143
3144 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3145 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3146 atomic_inc(&adapter->running_cap_crqs);
3147 ibmvnic_send_crq(adapter, &crq);
3148
3149 crq.request_capability.capability =
3150 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3151 crq.request_capability.number =
3152 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3153 atomic_inc(&adapter->running_cap_crqs);
3154 ibmvnic_send_crq(adapter, &crq);
3155
3156 crq.request_capability.capability =
3157 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3158 crq.request_capability.number =
3159 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3160 atomic_inc(&adapter->running_cap_crqs);
3161 ibmvnic_send_crq(adapter, &crq);
3162
3163 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3164 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3165 atomic_inc(&adapter->running_cap_crqs);
3166 ibmvnic_send_crq(adapter, &crq);
3167
3168 if (adapter->netdev->flags & IFF_PROMISC) {
3169 if (adapter->promisc_supported) {
3170 crq.request_capability.capability =
3171 cpu_to_be16(PROMISC_REQUESTED);
3172 crq.request_capability.number = cpu_to_be64(1);
3173 atomic_inc(&adapter->running_cap_crqs);
3174 ibmvnic_send_crq(adapter, &crq);
3175 }
3176 } else {
3177 crq.request_capability.capability =
3178 cpu_to_be16(PROMISC_REQUESTED);
3179 crq.request_capability.number = cpu_to_be64(0);
3180 atomic_inc(&adapter->running_cap_crqs);
3181 ibmvnic_send_crq(adapter, &crq);
3182 }
3183 }
3184
3185 static int pending_scrq(struct ibmvnic_adapter *adapter,
3186 struct ibmvnic_sub_crq_queue *scrq)
3187 {
3188 union sub_crq *entry = &scrq->msgs[scrq->cur];
3189
3190 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3191 return 1;
3192 else
3193 return 0;
3194 }
3195
3196 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3197 struct ibmvnic_sub_crq_queue *scrq)
3198 {
3199 union sub_crq *entry;
3200 unsigned long flags;
3201
3202 spin_lock_irqsave(&scrq->lock, flags);
3203 entry = &scrq->msgs[scrq->cur];
3204 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3205 if (++scrq->cur == scrq->size)
3206 scrq->cur = 0;
3207 } else {
3208 entry = NULL;
3209 }
3210 spin_unlock_irqrestore(&scrq->lock, flags);
3211
3212 return entry;
3213 }
3214
3215 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3216 {
3217 struct ibmvnic_crq_queue *queue = &adapter->crq;
3218 union ibmvnic_crq *crq;
3219
3220 crq = &queue->msgs[queue->cur];
3221 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3222 if (++queue->cur == queue->size)
3223 queue->cur = 0;
3224 } else {
3225 crq = NULL;
3226 }
3227
3228 return crq;
3229 }
3230
3231 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3232 {
3233 switch (rc) {
3234 case H_PARAMETER:
3235 dev_warn_ratelimited(dev,
3236 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3237 func, rc);
3238 break;
3239 case H_CLOSED:
3240 dev_warn_ratelimited(dev,
3241 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3242 func, rc);
3243 break;
3244 default:
3245 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3246 break;
3247 }
3248 }
3249
3250 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3251 union sub_crq *sub_crq)
3252 {
3253 unsigned int ua = adapter->vdev->unit_address;
3254 struct device *dev = &adapter->vdev->dev;
3255 u64 *u64_crq = (u64 *)sub_crq;
3256 int rc;
3257
3258 netdev_dbg(adapter->netdev,
3259 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3260 (unsigned long int)cpu_to_be64(remote_handle),
3261 (unsigned long int)cpu_to_be64(u64_crq[0]),
3262 (unsigned long int)cpu_to_be64(u64_crq[1]),
3263 (unsigned long int)cpu_to_be64(u64_crq[2]),
3264 (unsigned long int)cpu_to_be64(u64_crq[3]));
3265
3266 /* Make sure the hypervisor sees the complete request */
3267 mb();
3268
3269 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3270 cpu_to_be64(remote_handle),
3271 cpu_to_be64(u64_crq[0]),
3272 cpu_to_be64(u64_crq[1]),
3273 cpu_to_be64(u64_crq[2]),
3274 cpu_to_be64(u64_crq[3]));
3275
3276 if (rc)
3277 print_subcrq_error(dev, rc, __func__);
3278
3279 return rc;
3280 }
3281
3282 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3283 u64 remote_handle, u64 ioba, u64 num_entries)
3284 {
3285 unsigned int ua = adapter->vdev->unit_address;
3286 struct device *dev = &adapter->vdev->dev;
3287 int rc;
3288
3289 /* Make sure the hypervisor sees the complete request */
3290 mb();
3291 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3292 cpu_to_be64(remote_handle),
3293 ioba, num_entries);
3294
3295 if (rc)
3296 print_subcrq_error(dev, rc, __func__);
3297
3298 return rc;
3299 }
3300
3301 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3302 union ibmvnic_crq *crq)
3303 {
3304 unsigned int ua = adapter->vdev->unit_address;
3305 struct device *dev = &adapter->vdev->dev;
3306 u64 *u64_crq = (u64 *)crq;
3307 int rc;
3308
3309 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3310 (unsigned long int)cpu_to_be64(u64_crq[0]),
3311 (unsigned long int)cpu_to_be64(u64_crq[1]));
3312
3313 if (!adapter->crq.active &&
3314 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3315 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3316 return -EINVAL;
3317 }
3318
3319 /* Make sure the hypervisor sees the complete request */
3320 mb();
3321
3322 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3323 cpu_to_be64(u64_crq[0]),
3324 cpu_to_be64(u64_crq[1]));
3325
3326 if (rc) {
3327 if (rc == H_CLOSED) {
3328 dev_warn(dev, "CRQ Queue closed\n");
3329 if (adapter->resetting)
3330 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3331 }
3332
3333 dev_warn(dev, "Send error (rc=%d)\n", rc);
3334 }
3335
3336 return rc;
3337 }
3338
3339 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3340 {
3341 union ibmvnic_crq crq;
3342
3343 memset(&crq, 0, sizeof(crq));
3344 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3345 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3346 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3347
3348 return ibmvnic_send_crq(adapter, &crq);
3349 }
3350
3351 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3352 {
3353 union ibmvnic_crq crq;
3354
3355 memset(&crq, 0, sizeof(crq));
3356 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3357 crq.version_exchange.cmd = VERSION_EXCHANGE;
3358 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3359
3360 return ibmvnic_send_crq(adapter, &crq);
3361 }
3362
3363 struct vnic_login_client_data {
3364 u8 type;
3365 __be16 len;
3366 char name[];
3367 } __packed;
3368
3369 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3370 {
3371 int len;
3372
3373 /* Calculate the amount of buffer space needed for the
3374 * vnic client data in the login buffer. There are four entries,
3375 * OS name, LPAR name, device name, and a null last entry.
3376 */
3377 len = 4 * sizeof(struct vnic_login_client_data);
3378 len += 6; /* "Linux" plus NULL */
3379 len += strlen(utsname()->nodename) + 1;
3380 len += strlen(adapter->netdev->name) + 1;
3381
3382 return len;
3383 }
3384
3385 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3386 struct vnic_login_client_data *vlcd)
3387 {
3388 const char *os_name = "Linux";
3389 int len;
3390
3391 /* Type 1 - LPAR OS */
3392 vlcd->type = 1;
3393 len = strlen(os_name) + 1;
3394 vlcd->len = cpu_to_be16(len);
3395 strncpy(vlcd->name, os_name, len);
3396 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3397
3398 /* Type 2 - LPAR name */
3399 vlcd->type = 2;
3400 len = strlen(utsname()->nodename) + 1;
3401 vlcd->len = cpu_to_be16(len);
3402 strncpy(vlcd->name, utsname()->nodename, len);
3403 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3404
3405 /* Type 3 - device name */
3406 vlcd->type = 3;
3407 len = strlen(adapter->netdev->name) + 1;
3408 vlcd->len = cpu_to_be16(len);
3409 strncpy(vlcd->name, adapter->netdev->name, len);
3410 }
3411
3412 static int send_login(struct ibmvnic_adapter *adapter)
3413 {
3414 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3415 struct ibmvnic_login_buffer *login_buffer;
3416 struct device *dev = &adapter->vdev->dev;
3417 dma_addr_t rsp_buffer_token;
3418 dma_addr_t buffer_token;
3419 size_t rsp_buffer_size;
3420 union ibmvnic_crq crq;
3421 size_t buffer_size;
3422 __be64 *tx_list_p;
3423 __be64 *rx_list_p;
3424 int client_data_len;
3425 struct vnic_login_client_data *vlcd;
3426 int i;
3427
3428 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3429 netdev_err(adapter->netdev,
3430 "RX or TX queues are not allocated, device login failed\n");
3431 return -1;
3432 }
3433
3434 release_login_rsp_buffer(adapter);
3435 client_data_len = vnic_client_data_len(adapter);
3436
3437 buffer_size =
3438 sizeof(struct ibmvnic_login_buffer) +
3439 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3440 client_data_len;
3441
3442 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3443 if (!login_buffer)
3444 goto buf_alloc_failed;
3445
3446 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3447 DMA_TO_DEVICE);
3448 if (dma_mapping_error(dev, buffer_token)) {
3449 dev_err(dev, "Couldn't map login buffer\n");
3450 goto buf_map_failed;
3451 }
3452
3453 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3454 sizeof(u64) * adapter->req_tx_queues +
3455 sizeof(u64) * adapter->req_rx_queues +
3456 sizeof(u64) * adapter->req_rx_queues +
3457 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3458
3459 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3460 if (!login_rsp_buffer)
3461 goto buf_rsp_alloc_failed;
3462
3463 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3464 rsp_buffer_size, DMA_FROM_DEVICE);
3465 if (dma_mapping_error(dev, rsp_buffer_token)) {
3466 dev_err(dev, "Couldn't map login rsp buffer\n");
3467 goto buf_rsp_map_failed;
3468 }
3469
3470 adapter->login_buf = login_buffer;
3471 adapter->login_buf_token = buffer_token;
3472 adapter->login_buf_sz = buffer_size;
3473 adapter->login_rsp_buf = login_rsp_buffer;
3474 adapter->login_rsp_buf_token = rsp_buffer_token;
3475 adapter->login_rsp_buf_sz = rsp_buffer_size;
3476
3477 login_buffer->len = cpu_to_be32(buffer_size);
3478 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3479 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3480 login_buffer->off_txcomp_subcrqs =
3481 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3482 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3483 login_buffer->off_rxcomp_subcrqs =
3484 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3485 sizeof(u64) * adapter->req_tx_queues);
3486 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3487 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3488
3489 tx_list_p = (__be64 *)((char *)login_buffer +
3490 sizeof(struct ibmvnic_login_buffer));
3491 rx_list_p = (__be64 *)((char *)login_buffer +
3492 sizeof(struct ibmvnic_login_buffer) +
3493 sizeof(u64) * adapter->req_tx_queues);
3494
3495 for (i = 0; i < adapter->req_tx_queues; i++) {
3496 if (adapter->tx_scrq[i]) {
3497 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3498 crq_num);
3499 }
3500 }
3501
3502 for (i = 0; i < adapter->req_rx_queues; i++) {
3503 if (adapter->rx_scrq[i]) {
3504 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3505 crq_num);
3506 }
3507 }
3508
3509 /* Insert vNIC login client data */
3510 vlcd = (struct vnic_login_client_data *)
3511 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3512 login_buffer->client_data_offset =
3513 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3514 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3515
3516 vnic_add_client_data(adapter, vlcd);
3517
3518 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3519 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3520 netdev_dbg(adapter->netdev, "%016lx\n",
3521 ((unsigned long int *)(adapter->login_buf))[i]);
3522 }
3523
3524 memset(&crq, 0, sizeof(crq));
3525 crq.login.first = IBMVNIC_CRQ_CMD;
3526 crq.login.cmd = LOGIN;
3527 crq.login.ioba = cpu_to_be32(buffer_token);
3528 crq.login.len = cpu_to_be32(buffer_size);
3529 ibmvnic_send_crq(adapter, &crq);
3530
3531 return 0;
3532
3533 buf_rsp_map_failed:
3534 kfree(login_rsp_buffer);
3535 buf_rsp_alloc_failed:
3536 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3537 buf_map_failed:
3538 kfree(login_buffer);
3539 buf_alloc_failed:
3540 return -1;
3541 }
3542
3543 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3544 u32 len, u8 map_id)
3545 {
3546 union ibmvnic_crq crq;
3547
3548 memset(&crq, 0, sizeof(crq));
3549 crq.request_map.first = IBMVNIC_CRQ_CMD;
3550 crq.request_map.cmd = REQUEST_MAP;
3551 crq.request_map.map_id = map_id;
3552 crq.request_map.ioba = cpu_to_be32(addr);
3553 crq.request_map.len = cpu_to_be32(len);
3554 return ibmvnic_send_crq(adapter, &crq);
3555 }
3556
3557 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3558 {
3559 union ibmvnic_crq crq;
3560
3561 memset(&crq, 0, sizeof(crq));
3562 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3563 crq.request_unmap.cmd = REQUEST_UNMAP;
3564 crq.request_unmap.map_id = map_id;
3565 return ibmvnic_send_crq(adapter, &crq);
3566 }
3567
3568 static void send_map_query(struct ibmvnic_adapter *adapter)
3569 {
3570 union ibmvnic_crq crq;
3571
3572 memset(&crq, 0, sizeof(crq));
3573 crq.query_map.first = IBMVNIC_CRQ_CMD;
3574 crq.query_map.cmd = QUERY_MAP;
3575 ibmvnic_send_crq(adapter, &crq);
3576 }
3577
3578 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3579 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3580 {
3581 union ibmvnic_crq crq;
3582
3583 atomic_set(&adapter->running_cap_crqs, 0);
3584 memset(&crq, 0, sizeof(crq));
3585 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3586 crq.query_capability.cmd = QUERY_CAPABILITY;
3587
3588 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3589 atomic_inc(&adapter->running_cap_crqs);
3590 ibmvnic_send_crq(adapter, &crq);
3591
3592 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3593 atomic_inc(&adapter->running_cap_crqs);
3594 ibmvnic_send_crq(adapter, &crq);
3595
3596 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3597 atomic_inc(&adapter->running_cap_crqs);
3598 ibmvnic_send_crq(adapter, &crq);
3599
3600 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3601 atomic_inc(&adapter->running_cap_crqs);
3602 ibmvnic_send_crq(adapter, &crq);
3603
3604 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3605 atomic_inc(&adapter->running_cap_crqs);
3606 ibmvnic_send_crq(adapter, &crq);
3607
3608 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3609 atomic_inc(&adapter->running_cap_crqs);
3610 ibmvnic_send_crq(adapter, &crq);
3611
3612 crq.query_capability.capability =
3613 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3614 atomic_inc(&adapter->running_cap_crqs);
3615 ibmvnic_send_crq(adapter, &crq);
3616
3617 crq.query_capability.capability =
3618 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3619 atomic_inc(&adapter->running_cap_crqs);
3620 ibmvnic_send_crq(adapter, &crq);
3621
3622 crq.query_capability.capability =
3623 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3624 atomic_inc(&adapter->running_cap_crqs);
3625 ibmvnic_send_crq(adapter, &crq);
3626
3627 crq.query_capability.capability =
3628 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3629 atomic_inc(&adapter->running_cap_crqs);
3630 ibmvnic_send_crq(adapter, &crq);
3631
3632 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3633 atomic_inc(&adapter->running_cap_crqs);
3634 ibmvnic_send_crq(adapter, &crq);
3635
3636 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3637 atomic_inc(&adapter->running_cap_crqs);
3638 ibmvnic_send_crq(adapter, &crq);
3639
3640 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3641 atomic_inc(&adapter->running_cap_crqs);
3642 ibmvnic_send_crq(adapter, &crq);
3643
3644 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3645 atomic_inc(&adapter->running_cap_crqs);
3646 ibmvnic_send_crq(adapter, &crq);
3647
3648 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3649 atomic_inc(&adapter->running_cap_crqs);
3650 ibmvnic_send_crq(adapter, &crq);
3651
3652 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3653 atomic_inc(&adapter->running_cap_crqs);
3654 ibmvnic_send_crq(adapter, &crq);
3655
3656 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3657 atomic_inc(&adapter->running_cap_crqs);
3658 ibmvnic_send_crq(adapter, &crq);
3659
3660 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3661 atomic_inc(&adapter->running_cap_crqs);
3662 ibmvnic_send_crq(adapter, &crq);
3663
3664 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3665 atomic_inc(&adapter->running_cap_crqs);
3666 ibmvnic_send_crq(adapter, &crq);
3667
3668 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3669 atomic_inc(&adapter->running_cap_crqs);
3670 ibmvnic_send_crq(adapter, &crq);
3671
3672 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3673 atomic_inc(&adapter->running_cap_crqs);
3674 ibmvnic_send_crq(adapter, &crq);
3675
3676 crq.query_capability.capability =
3677 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3678 atomic_inc(&adapter->running_cap_crqs);
3679 ibmvnic_send_crq(adapter, &crq);
3680
3681 crq.query_capability.capability =
3682 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3683 atomic_inc(&adapter->running_cap_crqs);
3684 ibmvnic_send_crq(adapter, &crq);
3685
3686 crq.query_capability.capability =
3687 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3688 atomic_inc(&adapter->running_cap_crqs);
3689 ibmvnic_send_crq(adapter, &crq);
3690
3691 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3692 atomic_inc(&adapter->running_cap_crqs);
3693 ibmvnic_send_crq(adapter, &crq);
3694 }
3695
3696 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3697 struct ibmvnic_adapter *adapter)
3698 {
3699 struct device *dev = &adapter->vdev->dev;
3700
3701 if (crq->get_vpd_size_rsp.rc.code) {
3702 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3703 crq->get_vpd_size_rsp.rc.code);
3704 complete(&adapter->fw_done);
3705 return;
3706 }
3707
3708 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3709 complete(&adapter->fw_done);
3710 }
3711
3712 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3713 struct ibmvnic_adapter *adapter)
3714 {
3715 struct device *dev = &adapter->vdev->dev;
3716 unsigned char *substr = NULL;
3717 u8 fw_level_len = 0;
3718
3719 memset(adapter->fw_version, 0, 32);
3720
3721 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3722 DMA_FROM_DEVICE);
3723
3724 if (crq->get_vpd_rsp.rc.code) {
3725 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3726 crq->get_vpd_rsp.rc.code);
3727 goto complete;
3728 }
3729
3730 /* get the position of the firmware version info
3731 * located after the ASCII 'RM' substring in the buffer
3732 */
3733 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3734 if (!substr) {
3735 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3736 goto complete;
3737 }
3738
3739 /* get length of firmware level ASCII substring */
3740 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3741 fw_level_len = *(substr + 2);
3742 } else {
3743 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3744 goto complete;
3745 }
3746
3747 /* copy firmware version string from vpd into adapter */
3748 if ((substr + 3 + fw_level_len) <
3749 (adapter->vpd->buff + adapter->vpd->len)) {
3750 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3751 } else {
3752 dev_info(dev, "FW substr extrapolated VPD buff\n");
3753 }
3754
3755 complete:
3756 if (adapter->fw_version[0] == '\0')
3757 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3758 complete(&adapter->fw_done);
3759 }
3760
3761 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3762 {
3763 struct device *dev = &adapter->vdev->dev;
3764 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3765 netdev_features_t old_hw_features = 0;
3766 union ibmvnic_crq crq;
3767 int i;
3768
3769 dma_unmap_single(dev, adapter->ip_offload_tok,
3770 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3771
3772 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3773 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3774 netdev_dbg(adapter->netdev, "%016lx\n",
3775 ((unsigned long int *)(buf))[i]);
3776
3777 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3778 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3779 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3780 buf->tcp_ipv4_chksum);
3781 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3782 buf->tcp_ipv6_chksum);
3783 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3784 buf->udp_ipv4_chksum);
3785 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3786 buf->udp_ipv6_chksum);
3787 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3788 buf->large_tx_ipv4);
3789 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3790 buf->large_tx_ipv6);
3791 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3792 buf->large_rx_ipv4);
3793 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3794 buf->large_rx_ipv6);
3795 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3796 buf->max_ipv4_header_size);
3797 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3798 buf->max_ipv6_header_size);
3799 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3800 buf->max_tcp_header_size);
3801 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3802 buf->max_udp_header_size);
3803 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3804 buf->max_large_tx_size);
3805 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3806 buf->max_large_rx_size);
3807 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3808 buf->ipv6_extension_header);
3809 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3810 buf->tcp_pseudosum_req);
3811 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3812 buf->num_ipv6_ext_headers);
3813 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3814 buf->off_ipv6_ext_headers);
3815
3816 adapter->ip_offload_ctrl_tok =
3817 dma_map_single(dev, &adapter->ip_offload_ctrl,
3818 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3819
3820 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3821 dev_err(dev, "Couldn't map ip offload control buffer\n");
3822 return;
3823 }
3824
3825 adapter->ip_offload_ctrl.len =
3826 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3827 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3828 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3829 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3830 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3831 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3832 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3833 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3834 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3835 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3836
3837 /* large_rx disabled for now, additional features needed */
3838 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3839 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3840
3841 if (adapter->state != VNIC_PROBING) {
3842 old_hw_features = adapter->netdev->hw_features;
3843 adapter->netdev->hw_features = 0;
3844 }
3845
3846 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
3847
3848 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3849 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
3850
3851 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3852 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
3853
3854 if ((adapter->netdev->features &
3855 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3856 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
3857
3858 if (buf->large_tx_ipv4)
3859 adapter->netdev->hw_features |= NETIF_F_TSO;
3860 if (buf->large_tx_ipv6)
3861 adapter->netdev->hw_features |= NETIF_F_TSO6;
3862
3863 if (adapter->state == VNIC_PROBING) {
3864 adapter->netdev->features |= adapter->netdev->hw_features;
3865 } else if (old_hw_features != adapter->netdev->hw_features) {
3866 netdev_features_t tmp = 0;
3867
3868 /* disable features no longer supported */
3869 adapter->netdev->features &= adapter->netdev->hw_features;
3870 /* turn on features now supported if previously enabled */
3871 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
3872 adapter->netdev->hw_features;
3873 adapter->netdev->features |=
3874 tmp & adapter->netdev->wanted_features;
3875 }
3876
3877 memset(&crq, 0, sizeof(crq));
3878 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3879 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3880 crq.control_ip_offload.len =
3881 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3882 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3883 ibmvnic_send_crq(adapter, &crq);
3884 }
3885
3886 static const char *ibmvnic_fw_err_cause(u16 cause)
3887 {
3888 switch (cause) {
3889 case ADAPTER_PROBLEM:
3890 return "adapter problem";
3891 case BUS_PROBLEM:
3892 return "bus problem";
3893 case FW_PROBLEM:
3894 return "firmware problem";
3895 case DD_PROBLEM:
3896 return "device driver problem";
3897 case EEH_RECOVERY:
3898 return "EEH recovery";
3899 case FW_UPDATED:
3900 return "firmware updated";
3901 case LOW_MEMORY:
3902 return "low Memory";
3903 default:
3904 return "unknown";
3905 }
3906 }
3907
3908 static void handle_error_indication(union ibmvnic_crq *crq,
3909 struct ibmvnic_adapter *adapter)
3910 {
3911 struct device *dev = &adapter->vdev->dev;
3912 u16 cause;
3913
3914 cause = be16_to_cpu(crq->error_indication.error_cause);
3915
3916 dev_warn_ratelimited(dev,
3917 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3918 crq->error_indication.flags
3919 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3920 ibmvnic_fw_err_cause(cause));
3921
3922 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3923 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3924 else
3925 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3926 }
3927
3928 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3929 struct ibmvnic_adapter *adapter)
3930 {
3931 struct net_device *netdev = adapter->netdev;
3932 struct device *dev = &adapter->vdev->dev;
3933 long rc;
3934
3935 rc = crq->change_mac_addr_rsp.rc.code;
3936 if (rc) {
3937 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3938 goto out;
3939 }
3940 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3941 ETH_ALEN);
3942 out:
3943 complete(&adapter->fw_done);
3944 return rc;
3945 }
3946
3947 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3948 struct ibmvnic_adapter *adapter)
3949 {
3950 struct device *dev = &adapter->vdev->dev;
3951 u64 *req_value;
3952 char *name;
3953
3954 atomic_dec(&adapter->running_cap_crqs);
3955 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3956 case REQ_TX_QUEUES:
3957 req_value = &adapter->req_tx_queues;
3958 name = "tx";
3959 break;
3960 case REQ_RX_QUEUES:
3961 req_value = &adapter->req_rx_queues;
3962 name = "rx";
3963 break;
3964 case REQ_RX_ADD_QUEUES:
3965 req_value = &adapter->req_rx_add_queues;
3966 name = "rx_add";
3967 break;
3968 case REQ_TX_ENTRIES_PER_SUBCRQ:
3969 req_value = &adapter->req_tx_entries_per_subcrq;
3970 name = "tx_entries_per_subcrq";
3971 break;
3972 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3973 req_value = &adapter->req_rx_add_entries_per_subcrq;
3974 name = "rx_add_entries_per_subcrq";
3975 break;
3976 case REQ_MTU:
3977 req_value = &adapter->req_mtu;
3978 name = "mtu";
3979 break;
3980 case PROMISC_REQUESTED:
3981 req_value = &adapter->promisc;
3982 name = "promisc";
3983 break;
3984 default:
3985 dev_err(dev, "Got invalid cap request rsp %d\n",
3986 crq->request_capability.capability);
3987 return;
3988 }
3989
3990 switch (crq->request_capability_rsp.rc.code) {
3991 case SUCCESS:
3992 break;
3993 case PARTIALSUCCESS:
3994 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3995 *req_value,
3996 (long int)be64_to_cpu(crq->request_capability_rsp.
3997 number), name);
3998
3999 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4000 REQ_MTU) {
4001 pr_err("mtu of %llu is not supported. Reverting.\n",
4002 *req_value);
4003 *req_value = adapter->fallback.mtu;
4004 } else {
4005 *req_value =
4006 be64_to_cpu(crq->request_capability_rsp.number);
4007 }
4008
4009 ibmvnic_send_req_caps(adapter, 1);
4010 return;
4011 default:
4012 dev_err(dev, "Error %d in request cap rsp\n",
4013 crq->request_capability_rsp.rc.code);
4014 return;
4015 }
4016
4017 /* Done receiving requested capabilities, query IP offload support */
4018 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4019 union ibmvnic_crq newcrq;
4020 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4021 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4022 &adapter->ip_offload_buf;
4023
4024 adapter->wait_capability = false;
4025 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4026 buf_sz,
4027 DMA_FROM_DEVICE);
4028
4029 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4030 if (!firmware_has_feature(FW_FEATURE_CMO))
4031 dev_err(dev, "Couldn't map offload buffer\n");
4032 return;
4033 }
4034
4035 memset(&newcrq, 0, sizeof(newcrq));
4036 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4037 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4038 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4039 newcrq.query_ip_offload.ioba =
4040 cpu_to_be32(adapter->ip_offload_tok);
4041
4042 ibmvnic_send_crq(adapter, &newcrq);
4043 }
4044 }
4045
4046 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4047 struct ibmvnic_adapter *adapter)
4048 {
4049 struct device *dev = &adapter->vdev->dev;
4050 struct net_device *netdev = adapter->netdev;
4051 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4052 struct ibmvnic_login_buffer *login = adapter->login_buf;
4053 int i;
4054
4055 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4056 DMA_TO_DEVICE);
4057 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4058 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4059
4060 /* If the number of queues requested can't be allocated by the
4061 * server, the login response will return with code 1. We will need
4062 * to resend the login buffer with fewer queues requested.
4063 */
4064 if (login_rsp_crq->generic.rc.code) {
4065 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4066 complete(&adapter->init_done);
4067 return 0;
4068 }
4069
4070 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4071
4072 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4073 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4074 netdev_dbg(adapter->netdev, "%016lx\n",
4075 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4076 }
4077
4078 /* Sanity checks */
4079 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4080 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4081 adapter->req_rx_add_queues !=
4082 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4083 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4084 ibmvnic_remove(adapter->vdev);
4085 return -EIO;
4086 }
4087 release_login_buffer(adapter);
4088 complete(&adapter->init_done);
4089
4090 return 0;
4091 }
4092
4093 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4094 struct ibmvnic_adapter *adapter)
4095 {
4096 struct device *dev = &adapter->vdev->dev;
4097 long rc;
4098
4099 rc = crq->request_unmap_rsp.rc.code;
4100 if (rc)
4101 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4102 }
4103
4104 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4105 struct ibmvnic_adapter *adapter)
4106 {
4107 struct net_device *netdev = adapter->netdev;
4108 struct device *dev = &adapter->vdev->dev;
4109 long rc;
4110
4111 rc = crq->query_map_rsp.rc.code;
4112 if (rc) {
4113 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4114 return;
4115 }
4116 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4117 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4118 crq->query_map_rsp.free_pages);
4119 }
4120
4121 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4122 struct ibmvnic_adapter *adapter)
4123 {
4124 struct net_device *netdev = adapter->netdev;
4125 struct device *dev = &adapter->vdev->dev;
4126 long rc;
4127
4128 atomic_dec(&adapter->running_cap_crqs);
4129 netdev_dbg(netdev, "Outstanding queries: %d\n",
4130 atomic_read(&adapter->running_cap_crqs));
4131 rc = crq->query_capability.rc.code;
4132 if (rc) {
4133 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4134 goto out;
4135 }
4136
4137 switch (be16_to_cpu(crq->query_capability.capability)) {
4138 case MIN_TX_QUEUES:
4139 adapter->min_tx_queues =
4140 be64_to_cpu(crq->query_capability.number);
4141 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4142 adapter->min_tx_queues);
4143 break;
4144 case MIN_RX_QUEUES:
4145 adapter->min_rx_queues =
4146 be64_to_cpu(crq->query_capability.number);
4147 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4148 adapter->min_rx_queues);
4149 break;
4150 case MIN_RX_ADD_QUEUES:
4151 adapter->min_rx_add_queues =
4152 be64_to_cpu(crq->query_capability.number);
4153 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4154 adapter->min_rx_add_queues);
4155 break;
4156 case MAX_TX_QUEUES:
4157 adapter->max_tx_queues =
4158 be64_to_cpu(crq->query_capability.number);
4159 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4160 adapter->max_tx_queues);
4161 break;
4162 case MAX_RX_QUEUES:
4163 adapter->max_rx_queues =
4164 be64_to_cpu(crq->query_capability.number);
4165 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4166 adapter->max_rx_queues);
4167 break;
4168 case MAX_RX_ADD_QUEUES:
4169 adapter->max_rx_add_queues =
4170 be64_to_cpu(crq->query_capability.number);
4171 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4172 adapter->max_rx_add_queues);
4173 break;
4174 case MIN_TX_ENTRIES_PER_SUBCRQ:
4175 adapter->min_tx_entries_per_subcrq =
4176 be64_to_cpu(crq->query_capability.number);
4177 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4178 adapter->min_tx_entries_per_subcrq);
4179 break;
4180 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4181 adapter->min_rx_add_entries_per_subcrq =
4182 be64_to_cpu(crq->query_capability.number);
4183 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4184 adapter->min_rx_add_entries_per_subcrq);
4185 break;
4186 case MAX_TX_ENTRIES_PER_SUBCRQ:
4187 adapter->max_tx_entries_per_subcrq =
4188 be64_to_cpu(crq->query_capability.number);
4189 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4190 adapter->max_tx_entries_per_subcrq);
4191 break;
4192 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4193 adapter->max_rx_add_entries_per_subcrq =
4194 be64_to_cpu(crq->query_capability.number);
4195 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4196 adapter->max_rx_add_entries_per_subcrq);
4197 break;
4198 case TCP_IP_OFFLOAD:
4199 adapter->tcp_ip_offload =
4200 be64_to_cpu(crq->query_capability.number);
4201 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4202 adapter->tcp_ip_offload);
4203 break;
4204 case PROMISC_SUPPORTED:
4205 adapter->promisc_supported =
4206 be64_to_cpu(crq->query_capability.number);
4207 netdev_dbg(netdev, "promisc_supported = %lld\n",
4208 adapter->promisc_supported);
4209 break;
4210 case MIN_MTU:
4211 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4212 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4213 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4214 break;
4215 case MAX_MTU:
4216 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4217 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4218 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4219 break;
4220 case MAX_MULTICAST_FILTERS:
4221 adapter->max_multicast_filters =
4222 be64_to_cpu(crq->query_capability.number);
4223 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4224 adapter->max_multicast_filters);
4225 break;
4226 case VLAN_HEADER_INSERTION:
4227 adapter->vlan_header_insertion =
4228 be64_to_cpu(crq->query_capability.number);
4229 if (adapter->vlan_header_insertion)
4230 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4231 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4232 adapter->vlan_header_insertion);
4233 break;
4234 case RX_VLAN_HEADER_INSERTION:
4235 adapter->rx_vlan_header_insertion =
4236 be64_to_cpu(crq->query_capability.number);
4237 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4238 adapter->rx_vlan_header_insertion);
4239 break;
4240 case MAX_TX_SG_ENTRIES:
4241 adapter->max_tx_sg_entries =
4242 be64_to_cpu(crq->query_capability.number);
4243 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4244 adapter->max_tx_sg_entries);
4245 break;
4246 case RX_SG_SUPPORTED:
4247 adapter->rx_sg_supported =
4248 be64_to_cpu(crq->query_capability.number);
4249 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4250 adapter->rx_sg_supported);
4251 break;
4252 case OPT_TX_COMP_SUB_QUEUES:
4253 adapter->opt_tx_comp_sub_queues =
4254 be64_to_cpu(crq->query_capability.number);
4255 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4256 adapter->opt_tx_comp_sub_queues);
4257 break;
4258 case OPT_RX_COMP_QUEUES:
4259 adapter->opt_rx_comp_queues =
4260 be64_to_cpu(crq->query_capability.number);
4261 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4262 adapter->opt_rx_comp_queues);
4263 break;
4264 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4265 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4266 be64_to_cpu(crq->query_capability.number);
4267 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4268 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4269 break;
4270 case OPT_TX_ENTRIES_PER_SUBCRQ:
4271 adapter->opt_tx_entries_per_subcrq =
4272 be64_to_cpu(crq->query_capability.number);
4273 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4274 adapter->opt_tx_entries_per_subcrq);
4275 break;
4276 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4277 adapter->opt_rxba_entries_per_subcrq =
4278 be64_to_cpu(crq->query_capability.number);
4279 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4280 adapter->opt_rxba_entries_per_subcrq);
4281 break;
4282 case TX_RX_DESC_REQ:
4283 adapter->tx_rx_desc_req = crq->query_capability.number;
4284 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4285 adapter->tx_rx_desc_req);
4286 break;
4287
4288 default:
4289 netdev_err(netdev, "Got invalid cap rsp %d\n",
4290 crq->query_capability.capability);
4291 }
4292
4293 out:
4294 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4295 adapter->wait_capability = false;
4296 ibmvnic_send_req_caps(adapter, 0);
4297 }
4298 }
4299
4300 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4301 struct ibmvnic_adapter *adapter)
4302 {
4303 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4304 struct net_device *netdev = adapter->netdev;
4305 struct device *dev = &adapter->vdev->dev;
4306 u64 *u64_crq = (u64 *)crq;
4307 long rc;
4308
4309 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4310 (unsigned long int)cpu_to_be64(u64_crq[0]),
4311 (unsigned long int)cpu_to_be64(u64_crq[1]));
4312 switch (gen_crq->first) {
4313 case IBMVNIC_CRQ_INIT_RSP:
4314 switch (gen_crq->cmd) {
4315 case IBMVNIC_CRQ_INIT:
4316 dev_info(dev, "Partner initialized\n");
4317 adapter->from_passive_init = true;
4318 adapter->failover_pending = false;
4319 if (!completion_done(&adapter->init_done)) {
4320 complete(&adapter->init_done);
4321 adapter->init_done_rc = -EIO;
4322 }
4323 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4324 break;
4325 case IBMVNIC_CRQ_INIT_COMPLETE:
4326 dev_info(dev, "Partner initialization complete\n");
4327 adapter->crq.active = true;
4328 send_version_xchg(adapter);
4329 break;
4330 default:
4331 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4332 }
4333 return;
4334 case IBMVNIC_CRQ_XPORT_EVENT:
4335 netif_carrier_off(netdev);
4336 adapter->crq.active = false;
4337 if (adapter->resetting)
4338 adapter->force_reset_recovery = true;
4339 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4340 dev_info(dev, "Migrated, re-enabling adapter\n");
4341 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4342 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4343 dev_info(dev, "Backing device failover detected\n");
4344 adapter->failover_pending = true;
4345 } else {
4346 /* The adapter lost the connection */
4347 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4348 gen_crq->cmd);
4349 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4350 }
4351 return;
4352 case IBMVNIC_CRQ_CMD_RSP:
4353 break;
4354 default:
4355 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4356 gen_crq->first);
4357 return;
4358 }
4359
4360 switch (gen_crq->cmd) {
4361 case VERSION_EXCHANGE_RSP:
4362 rc = crq->version_exchange_rsp.rc.code;
4363 if (rc) {
4364 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4365 break;
4366 }
4367 dev_info(dev, "Partner protocol version is %d\n",
4368 crq->version_exchange_rsp.version);
4369 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4370 ibmvnic_version)
4371 ibmvnic_version =
4372 be16_to_cpu(crq->version_exchange_rsp.version);
4373 send_cap_queries(adapter);
4374 break;
4375 case QUERY_CAPABILITY_RSP:
4376 handle_query_cap_rsp(crq, adapter);
4377 break;
4378 case QUERY_MAP_RSP:
4379 handle_query_map_rsp(crq, adapter);
4380 break;
4381 case REQUEST_MAP_RSP:
4382 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4383 complete(&adapter->fw_done);
4384 break;
4385 case REQUEST_UNMAP_RSP:
4386 handle_request_unmap_rsp(crq, adapter);
4387 break;
4388 case REQUEST_CAPABILITY_RSP:
4389 handle_request_cap_rsp(crq, adapter);
4390 break;
4391 case LOGIN_RSP:
4392 netdev_dbg(netdev, "Got Login Response\n");
4393 handle_login_rsp(crq, adapter);
4394 break;
4395 case LOGICAL_LINK_STATE_RSP:
4396 netdev_dbg(netdev,
4397 "Got Logical Link State Response, state: %d rc: %d\n",
4398 crq->logical_link_state_rsp.link_state,
4399 crq->logical_link_state_rsp.rc.code);
4400 adapter->logical_link_state =
4401 crq->logical_link_state_rsp.link_state;
4402 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4403 complete(&adapter->init_done);
4404 break;
4405 case LINK_STATE_INDICATION:
4406 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4407 adapter->phys_link_state =
4408 crq->link_state_indication.phys_link_state;
4409 adapter->logical_link_state =
4410 crq->link_state_indication.logical_link_state;
4411 break;
4412 case CHANGE_MAC_ADDR_RSP:
4413 netdev_dbg(netdev, "Got MAC address change Response\n");
4414 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4415 break;
4416 case ERROR_INDICATION:
4417 netdev_dbg(netdev, "Got Error Indication\n");
4418 handle_error_indication(crq, adapter);
4419 break;
4420 case REQUEST_STATISTICS_RSP:
4421 netdev_dbg(netdev, "Got Statistics Response\n");
4422 complete(&adapter->stats_done);
4423 break;
4424 case QUERY_IP_OFFLOAD_RSP:
4425 netdev_dbg(netdev, "Got Query IP offload Response\n");
4426 handle_query_ip_offload_rsp(adapter);
4427 break;
4428 case MULTICAST_CTRL_RSP:
4429 netdev_dbg(netdev, "Got multicast control Response\n");
4430 break;
4431 case CONTROL_IP_OFFLOAD_RSP:
4432 netdev_dbg(netdev, "Got Control IP offload Response\n");
4433 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4434 sizeof(adapter->ip_offload_ctrl),
4435 DMA_TO_DEVICE);
4436 complete(&adapter->init_done);
4437 break;
4438 case COLLECT_FW_TRACE_RSP:
4439 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4440 complete(&adapter->fw_done);
4441 break;
4442 case GET_VPD_SIZE_RSP:
4443 handle_vpd_size_rsp(crq, adapter);
4444 break;
4445 case GET_VPD_RSP:
4446 handle_vpd_rsp(crq, adapter);
4447 break;
4448 default:
4449 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4450 gen_crq->cmd);
4451 }
4452 }
4453
4454 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4455 {
4456 struct ibmvnic_adapter *adapter = instance;
4457
4458 tasklet_schedule(&adapter->tasklet);
4459 return IRQ_HANDLED;
4460 }
4461
4462 static void ibmvnic_tasklet(void *data)
4463 {
4464 struct ibmvnic_adapter *adapter = data;
4465 struct ibmvnic_crq_queue *queue = &adapter->crq;
4466 union ibmvnic_crq *crq;
4467 unsigned long flags;
4468 bool done = false;
4469
4470 spin_lock_irqsave(&queue->lock, flags);
4471 while (!done) {
4472 /* Pull all the valid messages off the CRQ */
4473 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4474 ibmvnic_handle_crq(crq, adapter);
4475 crq->generic.first = 0;
4476 }
4477
4478 /* remain in tasklet until all
4479 * capabilities responses are received
4480 */
4481 if (!adapter->wait_capability)
4482 done = true;
4483 }
4484 /* if capabilities CRQ's were sent in this tasklet, the following
4485 * tasklet must wait until all responses are received
4486 */
4487 if (atomic_read(&adapter->running_cap_crqs) != 0)
4488 adapter->wait_capability = true;
4489 spin_unlock_irqrestore(&queue->lock, flags);
4490 }
4491
4492 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4493 {
4494 struct vio_dev *vdev = adapter->vdev;
4495 int rc;
4496
4497 do {
4498 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4499 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4500
4501 if (rc)
4502 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4503
4504 return rc;
4505 }
4506
4507 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4508 {
4509 struct ibmvnic_crq_queue *crq = &adapter->crq;
4510 struct device *dev = &adapter->vdev->dev;
4511 struct vio_dev *vdev = adapter->vdev;
4512 int rc;
4513
4514 /* Close the CRQ */
4515 do {
4516 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4517 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4518
4519 /* Clean out the queue */
4520 memset(crq->msgs, 0, PAGE_SIZE);
4521 crq->cur = 0;
4522 crq->active = false;
4523
4524 /* And re-open it again */
4525 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4526 crq->msg_token, PAGE_SIZE);
4527
4528 if (rc == H_CLOSED)
4529 /* Adapter is good, but other end is not ready */
4530 dev_warn(dev, "Partner adapter not ready\n");
4531 else if (rc != 0)
4532 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4533
4534 return rc;
4535 }
4536
4537 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4538 {
4539 struct ibmvnic_crq_queue *crq = &adapter->crq;
4540 struct vio_dev *vdev = adapter->vdev;
4541 long rc;
4542
4543 if (!crq->msgs)
4544 return;
4545
4546 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4547 free_irq(vdev->irq, adapter);
4548 tasklet_kill(&adapter->tasklet);
4549 do {
4550 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4551 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4552
4553 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4554 DMA_BIDIRECTIONAL);
4555 free_page((unsigned long)crq->msgs);
4556 crq->msgs = NULL;
4557 crq->active = false;
4558 }
4559
4560 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4561 {
4562 struct ibmvnic_crq_queue *crq = &adapter->crq;
4563 struct device *dev = &adapter->vdev->dev;
4564 struct vio_dev *vdev = adapter->vdev;
4565 int rc, retrc = -ENOMEM;
4566
4567 if (crq->msgs)
4568 return 0;
4569
4570 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4571 /* Should we allocate more than one page? */
4572
4573 if (!crq->msgs)
4574 return -ENOMEM;
4575
4576 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4577 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4578 DMA_BIDIRECTIONAL);
4579 if (dma_mapping_error(dev, crq->msg_token))
4580 goto map_failed;
4581
4582 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4583 crq->msg_token, PAGE_SIZE);
4584
4585 if (rc == H_RESOURCE)
4586 /* maybe kexecing and resource is busy. try a reset */
4587 rc = ibmvnic_reset_crq(adapter);
4588 retrc = rc;
4589
4590 if (rc == H_CLOSED) {
4591 dev_warn(dev, "Partner adapter not ready\n");
4592 } else if (rc) {
4593 dev_warn(dev, "Error %d opening adapter\n", rc);
4594 goto reg_crq_failed;
4595 }
4596
4597 retrc = 0;
4598
4599 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4600 (unsigned long)adapter);
4601
4602 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4603 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4604 adapter);
4605 if (rc) {
4606 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4607 vdev->irq, rc);
4608 goto req_irq_failed;
4609 }
4610
4611 rc = vio_enable_interrupts(vdev);
4612 if (rc) {
4613 dev_err(dev, "Error %d enabling interrupts\n", rc);
4614 goto req_irq_failed;
4615 }
4616
4617 crq->cur = 0;
4618 spin_lock_init(&crq->lock);
4619
4620 return retrc;
4621
4622 req_irq_failed:
4623 tasklet_kill(&adapter->tasklet);
4624 do {
4625 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4626 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4627 reg_crq_failed:
4628 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4629 map_failed:
4630 free_page((unsigned long)crq->msgs);
4631 crq->msgs = NULL;
4632 return retrc;
4633 }
4634
4635 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4636 {
4637 struct device *dev = &adapter->vdev->dev;
4638 unsigned long timeout = msecs_to_jiffies(30000);
4639 u64 old_num_rx_queues, old_num_tx_queues;
4640 int rc;
4641
4642 adapter->from_passive_init = false;
4643
4644 old_num_rx_queues = adapter->req_rx_queues;
4645 old_num_tx_queues = adapter->req_tx_queues;
4646
4647 reinit_completion(&adapter->init_done);
4648 adapter->init_done_rc = 0;
4649 ibmvnic_send_crq_init(adapter);
4650 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4651 dev_err(dev, "Initialization sequence timed out\n");
4652 return -1;
4653 }
4654
4655 if (adapter->init_done_rc) {
4656 release_crq_queue(adapter);
4657 return adapter->init_done_rc;
4658 }
4659
4660 if (adapter->from_passive_init) {
4661 adapter->state = VNIC_OPEN;
4662 adapter->from_passive_init = false;
4663 return -1;
4664 }
4665
4666 if (adapter->resetting && !adapter->wait_for_reset &&
4667 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4668 if (adapter->req_rx_queues != old_num_rx_queues ||
4669 adapter->req_tx_queues != old_num_tx_queues) {
4670 release_sub_crqs(adapter, 0);
4671 rc = init_sub_crqs(adapter);
4672 } else {
4673 rc = reset_sub_crq_queues(adapter);
4674 }
4675 } else {
4676 rc = init_sub_crqs(adapter);
4677 }
4678
4679 if (rc) {
4680 dev_err(dev, "Initialization of sub crqs failed\n");
4681 release_crq_queue(adapter);
4682 return rc;
4683 }
4684
4685 rc = init_sub_crq_irqs(adapter);
4686 if (rc) {
4687 dev_err(dev, "Failed to initialize sub crq irqs\n");
4688 release_crq_queue(adapter);
4689 }
4690
4691 return rc;
4692 }
4693
4694 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4695 {
4696 struct device *dev = &adapter->vdev->dev;
4697 unsigned long timeout = msecs_to_jiffies(30000);
4698 int rc;
4699
4700 adapter->from_passive_init = false;
4701
4702 adapter->init_done_rc = 0;
4703 ibmvnic_send_crq_init(adapter);
4704 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4705 dev_err(dev, "Initialization sequence timed out\n");
4706 return -1;
4707 }
4708
4709 if (adapter->init_done_rc) {
4710 release_crq_queue(adapter);
4711 return adapter->init_done_rc;
4712 }
4713
4714 if (adapter->from_passive_init) {
4715 adapter->state = VNIC_OPEN;
4716 adapter->from_passive_init = false;
4717 return -1;
4718 }
4719
4720 rc = init_sub_crqs(adapter);
4721 if (rc) {
4722 dev_err(dev, "Initialization of sub crqs failed\n");
4723 release_crq_queue(adapter);
4724 return rc;
4725 }
4726
4727 rc = init_sub_crq_irqs(adapter);
4728 if (rc) {
4729 dev_err(dev, "Failed to initialize sub crq irqs\n");
4730 release_crq_queue(adapter);
4731 }
4732
4733 return rc;
4734 }
4735
4736 static struct device_attribute dev_attr_failover;
4737
4738 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4739 {
4740 struct ibmvnic_adapter *adapter;
4741 struct net_device *netdev;
4742 unsigned char *mac_addr_p;
4743 int rc;
4744
4745 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4746 dev->unit_address);
4747
4748 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4749 VETH_MAC_ADDR, NULL);
4750 if (!mac_addr_p) {
4751 dev_err(&dev->dev,
4752 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4753 __FILE__, __LINE__);
4754 return 0;
4755 }
4756
4757 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4758 IBMVNIC_MAX_QUEUES);
4759 if (!netdev)
4760 return -ENOMEM;
4761
4762 adapter = netdev_priv(netdev);
4763 adapter->state = VNIC_PROBING;
4764 dev_set_drvdata(&dev->dev, netdev);
4765 adapter->vdev = dev;
4766 adapter->netdev = netdev;
4767
4768 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4769 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4770 netdev->irq = dev->irq;
4771 netdev->netdev_ops = &ibmvnic_netdev_ops;
4772 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4773 SET_NETDEV_DEV(netdev, &dev->dev);
4774
4775 spin_lock_init(&adapter->stats_lock);
4776
4777 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4778 INIT_LIST_HEAD(&adapter->rwi_list);
4779 spin_lock_init(&adapter->rwi_lock);
4780 init_completion(&adapter->init_done);
4781 adapter->resetting = false;
4782
4783 adapter->mac_change_pending = false;
4784
4785 do {
4786 rc = init_crq_queue(adapter);
4787 if (rc) {
4788 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4789 rc);
4790 goto ibmvnic_init_fail;
4791 }
4792
4793 rc = ibmvnic_init(adapter);
4794 if (rc && rc != EAGAIN)
4795 goto ibmvnic_init_fail;
4796 } while (rc == EAGAIN);
4797
4798 rc = init_stats_buffers(adapter);
4799 if (rc)
4800 goto ibmvnic_init_fail;
4801
4802 rc = init_stats_token(adapter);
4803 if (rc)
4804 goto ibmvnic_stats_fail;
4805
4806 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4807 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4808 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4809
4810 rc = device_create_file(&dev->dev, &dev_attr_failover);
4811 if (rc)
4812 goto ibmvnic_dev_file_err;
4813
4814 netif_carrier_off(netdev);
4815 rc = register_netdev(netdev);
4816 if (rc) {
4817 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4818 goto ibmvnic_register_fail;
4819 }
4820 dev_info(&dev->dev, "ibmvnic registered\n");
4821
4822 adapter->state = VNIC_PROBED;
4823
4824 adapter->wait_for_reset = false;
4825
4826 return 0;
4827
4828 ibmvnic_register_fail:
4829 device_remove_file(&dev->dev, &dev_attr_failover);
4830
4831 ibmvnic_dev_file_err:
4832 release_stats_token(adapter);
4833
4834 ibmvnic_stats_fail:
4835 release_stats_buffers(adapter);
4836
4837 ibmvnic_init_fail:
4838 release_sub_crqs(adapter, 1);
4839 release_crq_queue(adapter);
4840 free_netdev(netdev);
4841
4842 return rc;
4843 }
4844
4845 static int ibmvnic_remove(struct vio_dev *dev)
4846 {
4847 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4848 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4849
4850 adapter->state = VNIC_REMOVING;
4851 rtnl_lock();
4852 unregister_netdevice(netdev);
4853
4854 release_resources(adapter);
4855 release_sub_crqs(adapter, 1);
4856 release_crq_queue(adapter);
4857
4858 release_stats_token(adapter);
4859 release_stats_buffers(adapter);
4860
4861 adapter->state = VNIC_REMOVED;
4862
4863 rtnl_unlock();
4864 device_remove_file(&dev->dev, &dev_attr_failover);
4865 free_netdev(netdev);
4866 dev_set_drvdata(&dev->dev, NULL);
4867
4868 return 0;
4869 }
4870
4871 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4872 const char *buf, size_t count)
4873 {
4874 struct net_device *netdev = dev_get_drvdata(dev);
4875 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4876 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4877 __be64 session_token;
4878 long rc;
4879
4880 if (!sysfs_streq(buf, "1"))
4881 return -EINVAL;
4882
4883 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4884 H_GET_SESSION_TOKEN, 0, 0, 0);
4885 if (rc) {
4886 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4887 rc);
4888 return -EINVAL;
4889 }
4890
4891 session_token = (__be64)retbuf[0];
4892 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4893 be64_to_cpu(session_token));
4894 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4895 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4896 if (rc) {
4897 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4898 rc);
4899 return -EINVAL;
4900 }
4901
4902 return count;
4903 }
4904
4905 static DEVICE_ATTR_WO(failover);
4906
4907 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4908 {
4909 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4910 struct ibmvnic_adapter *adapter;
4911 struct iommu_table *tbl;
4912 unsigned long ret = 0;
4913 int i;
4914
4915 tbl = get_iommu_table_base(&vdev->dev);
4916
4917 /* netdev inits at probe time along with the structures we need below*/
4918 if (!netdev)
4919 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4920
4921 adapter = netdev_priv(netdev);
4922
4923 ret += PAGE_SIZE; /* the crq message queue */
4924 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4925
4926 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4927 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4928
4929 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4930 i++)
4931 ret += adapter->rx_pool[i].size *
4932 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4933
4934 return ret;
4935 }
4936
4937 static int ibmvnic_resume(struct device *dev)
4938 {
4939 struct net_device *netdev = dev_get_drvdata(dev);
4940 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4941
4942 if (adapter->state != VNIC_OPEN)
4943 return 0;
4944
4945 tasklet_schedule(&adapter->tasklet);
4946
4947 return 0;
4948 }
4949
4950 static const struct vio_device_id ibmvnic_device_table[] = {
4951 {"network", "IBM,vnic"},
4952 {"", "" }
4953 };
4954 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4955
4956 static const struct dev_pm_ops ibmvnic_pm_ops = {
4957 .resume = ibmvnic_resume
4958 };
4959
4960 static struct vio_driver ibmvnic_driver = {
4961 .id_table = ibmvnic_device_table,
4962 .probe = ibmvnic_probe,
4963 .remove = ibmvnic_remove,
4964 .get_desired_dma = ibmvnic_get_desired_dma,
4965 .name = ibmvnic_driver_name,
4966 .pm = &ibmvnic_pm_ops,
4967 };
4968
4969 /* module functions */
4970 static int __init ibmvnic_module_init(void)
4971 {
4972 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4973 IBMVNIC_DRIVER_VERSION);
4974
4975 return vio_register_driver(&ibmvnic_driver);
4976 }
4977
4978 static void __exit ibmvnic_module_exit(void)
4979 {
4980 vio_unregister_driver(&ibmvnic_driver);
4981 }
4982
4983 module_init(ibmvnic_module_init);
4984 module_exit(ibmvnic_module_exit);
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