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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / net / ethernet / ibm / ibmvnic.c
blob7893beffcc714215a5ed47fc8658b9db66ee9d3a
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[i].skb);
489 rx_pool->rx_buff[i].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 if (&adapter->napi[i]) {
777 netdev_dbg(adapter->netdev,
778 "Releasing napi[%d]\n", i);
779 netif_napi_del(&adapter->napi[i]);
780 }
781 }
782
783 kfree(adapter->napi);
784 adapter->napi = NULL;
785 adapter->num_active_rx_napi = 0;
786 adapter->napi_enabled = false;
787 }
788
789 static int ibmvnic_login(struct net_device *netdev)
790 {
791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
792 unsigned long timeout = msecs_to_jiffies(30000);
793 int retry_count = 0;
794 bool retry;
795 int rc;
796
797 do {
798 retry = false;
799 if (retry_count > IBMVNIC_MAX_QUEUES) {
800 netdev_warn(netdev, "Login attempts exceeded\n");
801 return -1;
802 }
803
804 adapter->init_done_rc = 0;
805 reinit_completion(&adapter->init_done);
806 rc = send_login(adapter);
807 if (rc) {
808 netdev_warn(netdev, "Unable to login\n");
809 return rc;
810 }
811
812 if (!wait_for_completion_timeout(&adapter->init_done,
813 timeout)) {
814 netdev_warn(netdev, "Login timed out\n");
815 return -1;
816 }
817
818 if (adapter->init_done_rc == PARTIALSUCCESS) {
819 retry_count++;
820 release_sub_crqs(adapter, 1);
821
822 retry = true;
823 netdev_dbg(netdev,
824 "Received partial success, retrying...\n");
825 adapter->init_done_rc = 0;
826 reinit_completion(&adapter->init_done);
827 send_cap_queries(adapter);
828 if (!wait_for_completion_timeout(&adapter->init_done,
829 timeout)) {
830 netdev_warn(netdev,
831 "Capabilities query timed out\n");
832 return -1;
833 }
834
835 rc = init_sub_crqs(adapter);
836 if (rc) {
837 netdev_warn(netdev,
838 "SCRQ initialization failed\n");
839 return -1;
840 }
841
842 rc = init_sub_crq_irqs(adapter);
843 if (rc) {
844 netdev_warn(netdev,
845 "SCRQ irq initialization failed\n");
846 return -1;
847 }
848 } else if (adapter->init_done_rc) {
849 netdev_warn(netdev, "Adapter login failed\n");
850 return -1;
851 }
852 } while (retry);
853
854 /* handle pending MAC address changes after successful login */
855 if (adapter->mac_change_pending) {
856 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
857 adapter->mac_change_pending = false;
858 }
859
860 return 0;
861 }
862
863 static void release_login_buffer(struct ibmvnic_adapter *adapter)
864 {
865 kfree(adapter->login_buf);
866 adapter->login_buf = NULL;
867 }
868
869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
870 {
871 kfree(adapter->login_rsp_buf);
872 adapter->login_rsp_buf = NULL;
873 }
874
875 static void release_resources(struct ibmvnic_adapter *adapter)
876 {
877 release_vpd_data(adapter);
878
879 release_tx_pools(adapter);
880 release_rx_pools(adapter);
881
882 release_napi(adapter);
883 release_login_rsp_buffer(adapter);
884 }
885
886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
887 {
888 struct net_device *netdev = adapter->netdev;
889 unsigned long timeout = msecs_to_jiffies(30000);
890 union ibmvnic_crq crq;
891 bool resend;
892 int rc;
893
894 netdev_dbg(netdev, "setting link state %d\n", link_state);
895
896 memset(&crq, 0, sizeof(crq));
897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
899 crq.logical_link_state.link_state = link_state;
900
901 do {
902 resend = false;
903
904 reinit_completion(&adapter->init_done);
905 rc = ibmvnic_send_crq(adapter, &crq);
906 if (rc) {
907 netdev_err(netdev, "Failed to set link state\n");
908 return rc;
909 }
910
911 if (!wait_for_completion_timeout(&adapter->init_done,
912 timeout)) {
913 netdev_err(netdev, "timeout setting link state\n");
914 return -1;
915 }
916
917 if (adapter->init_done_rc == 1) {
918 /* Partuial success, delay and re-send */
919 mdelay(1000);
920 resend = true;
921 } else if (adapter->init_done_rc) {
922 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
923 adapter->init_done_rc);
924 return adapter->init_done_rc;
925 }
926 } while (resend);
927
928 return 0;
929 }
930
931 static int set_real_num_queues(struct net_device *netdev)
932 {
933 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
934 int rc;
935
936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
937 adapter->req_tx_queues, adapter->req_rx_queues);
938
939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
940 if (rc) {
941 netdev_err(netdev, "failed to set the number of tx queues\n");
942 return rc;
943 }
944
945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
946 if (rc)
947 netdev_err(netdev, "failed to set the number of rx queues\n");
948
949 return rc;
950 }
951
952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
953 {
954 struct device *dev = &adapter->vdev->dev;
955 union ibmvnic_crq crq;
956 int len = 0;
957 int rc;
958
959 if (adapter->vpd->buff)
960 len = adapter->vpd->len;
961
962 init_completion(&adapter->fw_done);
963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
964 crq.get_vpd_size.cmd = GET_VPD_SIZE;
965 rc = ibmvnic_send_crq(adapter, &crq);
966 if (rc)
967 return rc;
968 wait_for_completion(&adapter->fw_done);
969
970 if (!adapter->vpd->len)
971 return -ENODATA;
972
973 if (!adapter->vpd->buff)
974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
975 else if (adapter->vpd->len != len)
976 adapter->vpd->buff =
977 krealloc(adapter->vpd->buff,
978 adapter->vpd->len, GFP_KERNEL);
979
980 if (!adapter->vpd->buff) {
981 dev_err(dev, "Could allocate VPD buffer\n");
982 return -ENOMEM;
983 }
984
985 adapter->vpd->dma_addr =
986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
987 DMA_FROM_DEVICE);
988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
989 dev_err(dev, "Could not map VPD buffer\n");
990 kfree(adapter->vpd->buff);
991 adapter->vpd->buff = NULL;
992 return -ENOMEM;
993 }
994
995 reinit_completion(&adapter->fw_done);
996 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
997 crq.get_vpd.cmd = GET_VPD;
998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1000 rc = ibmvnic_send_crq(adapter, &crq);
1001 if (rc) {
1002 kfree(adapter->vpd->buff);
1003 adapter->vpd->buff = NULL;
1004 return rc;
1005 }
1006 wait_for_completion(&adapter->fw_done);
1007
1008 return 0;
1009 }
1010
1011 static int init_resources(struct ibmvnic_adapter *adapter)
1012 {
1013 struct net_device *netdev = adapter->netdev;
1014 int rc;
1015
1016 rc = set_real_num_queues(netdev);
1017 if (rc)
1018 return rc;
1019
1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1021 if (!adapter->vpd)
1022 return -ENOMEM;
1023
1024 /* Vital Product Data (VPD) */
1025 rc = ibmvnic_get_vpd(adapter);
1026 if (rc) {
1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1028 return rc;
1029 }
1030
1031 adapter->map_id = 1;
1032
1033 rc = init_napi(adapter);
1034 if (rc)
1035 return rc;
1036
1037 send_map_query(adapter);
1038
1039 rc = init_rx_pools(netdev);
1040 if (rc)
1041 return rc;
1042
1043 rc = init_tx_pools(netdev);
1044 return rc;
1045 }
1046
1047 static int __ibmvnic_open(struct net_device *netdev)
1048 {
1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1050 enum vnic_state prev_state = adapter->state;
1051 int i, rc;
1052
1053 adapter->state = VNIC_OPENING;
1054 replenish_pools(adapter);
1055 ibmvnic_napi_enable(adapter);
1056
1057 /* We're ready to receive frames, enable the sub-crq interrupts and
1058 * set the logical link state to up
1059 */
1060 for (i = 0; i < adapter->req_rx_queues; i++) {
1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1062 if (prev_state == VNIC_CLOSED)
1063 enable_irq(adapter->rx_scrq[i]->irq);
1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1065 }
1066
1067 for (i = 0; i < adapter->req_tx_queues; i++) {
1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1069 if (prev_state == VNIC_CLOSED)
1070 enable_irq(adapter->tx_scrq[i]->irq);
1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1072 }
1073
1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1075 if (rc) {
1076 for (i = 0; i < adapter->req_rx_queues; i++)
1077 napi_disable(&adapter->napi[i]);
1078 release_resources(adapter);
1079 return rc;
1080 }
1081
1082 netif_tx_start_all_queues(netdev);
1083
1084 if (prev_state == VNIC_CLOSED) {
1085 for (i = 0; i < adapter->req_rx_queues; i++)
1086 napi_schedule(&adapter->napi[i]);
1087 }
1088
1089 adapter->state = VNIC_OPEN;
1090 return rc;
1091 }
1092
1093 static int ibmvnic_open(struct net_device *netdev)
1094 {
1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1096 int rc;
1097
1098 /* If device failover is pending, just set device state and return.
1099 * Device operation will be handled by reset routine.
1100 */
1101 if (adapter->failover_pending) {
1102 adapter->state = VNIC_OPEN;
1103 return 0;
1104 }
1105
1106 mutex_lock(&adapter->reset_lock);
1107
1108 if (adapter->state != VNIC_CLOSED) {
1109 rc = ibmvnic_login(netdev);
1110 if (rc) {
1111 mutex_unlock(&adapter->reset_lock);
1112 return rc;
1113 }
1114
1115 rc = init_resources(adapter);
1116 if (rc) {
1117 netdev_err(netdev, "failed to initialize resources\n");
1118 release_resources(adapter);
1119 mutex_unlock(&adapter->reset_lock);
1120 return rc;
1121 }
1122 }
1123
1124 rc = __ibmvnic_open(netdev);
1125 netif_carrier_on(netdev);
1126
1127 mutex_unlock(&adapter->reset_lock);
1128
1129 return rc;
1130 }
1131
1132 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1133 {
1134 struct ibmvnic_rx_pool *rx_pool;
1135 struct ibmvnic_rx_buff *rx_buff;
1136 u64 rx_entries;
1137 int rx_scrqs;
1138 int i, j;
1139
1140 if (!adapter->rx_pool)
1141 return;
1142
1143 rx_scrqs = adapter->num_active_rx_pools;
1144 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1145
1146 /* Free any remaining skbs in the rx buffer pools */
1147 for (i = 0; i < rx_scrqs; i++) {
1148 rx_pool = &adapter->rx_pool[i];
1149 if (!rx_pool || !rx_pool->rx_buff)
1150 continue;
1151
1152 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1153 for (j = 0; j < rx_entries; j++) {
1154 rx_buff = &rx_pool->rx_buff[j];
1155 if (rx_buff && rx_buff->skb) {
1156 dev_kfree_skb_any(rx_buff->skb);
1157 rx_buff->skb = NULL;
1158 }
1159 }
1160 }
1161 }
1162
1163 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1164 struct ibmvnic_tx_pool *tx_pool)
1165 {
1166 struct ibmvnic_tx_buff *tx_buff;
1167 u64 tx_entries;
1168 int i;
1169
1170 if (!tx_pool || !tx_pool->tx_buff)
1171 return;
1172
1173 tx_entries = tx_pool->num_buffers;
1174
1175 for (i = 0; i < tx_entries; i++) {
1176 tx_buff = &tx_pool->tx_buff[i];
1177 if (tx_buff && tx_buff->skb) {
1178 dev_kfree_skb_any(tx_buff->skb);
1179 tx_buff->skb = NULL;
1180 }
1181 }
1182 }
1183
1184 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1185 {
1186 int tx_scrqs;
1187 int i;
1188
1189 if (!adapter->tx_pool || !adapter->tso_pool)
1190 return;
1191
1192 tx_scrqs = adapter->num_active_tx_pools;
1193
1194 /* Free any remaining skbs in the tx buffer pools */
1195 for (i = 0; i < tx_scrqs; i++) {
1196 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1197 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1198 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1199 }
1200 }
1201
1202 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1203 {
1204 struct net_device *netdev = adapter->netdev;
1205 int i;
1206
1207 if (adapter->tx_scrq) {
1208 for (i = 0; i < adapter->req_tx_queues; i++)
1209 if (adapter->tx_scrq[i]->irq) {
1210 netdev_dbg(netdev,
1211 "Disabling tx_scrq[%d] irq\n", i);
1212 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1213 disable_irq(adapter->tx_scrq[i]->irq);
1214 }
1215 }
1216
1217 if (adapter->rx_scrq) {
1218 for (i = 0; i < adapter->req_rx_queues; i++) {
1219 if (adapter->rx_scrq[i]->irq) {
1220 netdev_dbg(netdev,
1221 "Disabling rx_scrq[%d] irq\n", i);
1222 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1223 disable_irq(adapter->rx_scrq[i]->irq);
1224 }
1225 }
1226 }
1227 }
1228
1229 static void ibmvnic_cleanup(struct net_device *netdev)
1230 {
1231 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1232
1233 /* ensure that transmissions are stopped if called by do_reset */
1234 if (adapter->resetting)
1235 netif_tx_disable(netdev);
1236 else
1237 netif_tx_stop_all_queues(netdev);
1238
1239 ibmvnic_napi_disable(adapter);
1240 ibmvnic_disable_irqs(adapter);
1241
1242 clean_rx_pools(adapter);
1243 clean_tx_pools(adapter);
1244 }
1245
1246 static int __ibmvnic_close(struct net_device *netdev)
1247 {
1248 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1249 int rc = 0;
1250
1251 adapter->state = VNIC_CLOSING;
1252 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1253 if (rc)
1254 return rc;
1255 adapter->state = VNIC_CLOSED;
1256 return 0;
1257 }
1258
1259 static int ibmvnic_close(struct net_device *netdev)
1260 {
1261 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1262 int rc;
1263
1264 /* If device failover is pending, just set device state and return.
1265 * Device operation will be handled by reset routine.
1266 */
1267 if (adapter->failover_pending) {
1268 adapter->state = VNIC_CLOSED;
1269 return 0;
1270 }
1271
1272 mutex_lock(&adapter->reset_lock);
1273 rc = __ibmvnic_close(netdev);
1274 ibmvnic_cleanup(netdev);
1275 mutex_unlock(&adapter->reset_lock);
1276
1277 return rc;
1278 }
1279
1280 /**
1281 * build_hdr_data - creates L2/L3/L4 header data buffer
1282 * @hdr_field - bitfield determining needed headers
1283 * @skb - socket buffer
1284 * @hdr_len - array of header lengths
1285 * @tot_len - total length of data
1286 *
1287 * Reads hdr_field to determine which headers are needed by firmware.
1288 * Builds a buffer containing these headers. Saves individual header
1289 * lengths and total buffer length to be used to build descriptors.
1290 */
1291 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1292 int *hdr_len, u8 *hdr_data)
1293 {
1294 int len = 0;
1295 u8 *hdr;
1296
1297 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1298 hdr_len[0] = sizeof(struct vlan_ethhdr);
1299 else
1300 hdr_len[0] = sizeof(struct ethhdr);
1301
1302 if (skb->protocol == htons(ETH_P_IP)) {
1303 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1304 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1305 hdr_len[2] = tcp_hdrlen(skb);
1306 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1307 hdr_len[2] = sizeof(struct udphdr);
1308 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1309 hdr_len[1] = sizeof(struct ipv6hdr);
1310 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1311 hdr_len[2] = tcp_hdrlen(skb);
1312 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1313 hdr_len[2] = sizeof(struct udphdr);
1314 } else if (skb->protocol == htons(ETH_P_ARP)) {
1315 hdr_len[1] = arp_hdr_len(skb->dev);
1316 hdr_len[2] = 0;
1317 }
1318
1319 memset(hdr_data, 0, 120);
1320 if ((hdr_field >> 6) & 1) {
1321 hdr = skb_mac_header(skb);
1322 memcpy(hdr_data, hdr, hdr_len[0]);
1323 len += hdr_len[0];
1324 }
1325
1326 if ((hdr_field >> 5) & 1) {
1327 hdr = skb_network_header(skb);
1328 memcpy(hdr_data + len, hdr, hdr_len[1]);
1329 len += hdr_len[1];
1330 }
1331
1332 if ((hdr_field >> 4) & 1) {
1333 hdr = skb_transport_header(skb);
1334 memcpy(hdr_data + len, hdr, hdr_len[2]);
1335 len += hdr_len[2];
1336 }
1337 return len;
1338 }
1339
1340 /**
1341 * create_hdr_descs - create header and header extension descriptors
1342 * @hdr_field - bitfield determining needed headers
1343 * @data - buffer containing header data
1344 * @len - length of data buffer
1345 * @hdr_len - array of individual header lengths
1346 * @scrq_arr - descriptor array
1347 *
1348 * Creates header and, if needed, header extension descriptors and
1349 * places them in a descriptor array, scrq_arr
1350 */
1351
1352 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1353 union sub_crq *scrq_arr)
1354 {
1355 union sub_crq hdr_desc;
1356 int tmp_len = len;
1357 int num_descs = 0;
1358 u8 *data, *cur;
1359 int tmp;
1360
1361 while (tmp_len > 0) {
1362 cur = hdr_data + len - tmp_len;
1363
1364 memset(&hdr_desc, 0, sizeof(hdr_desc));
1365 if (cur != hdr_data) {
1366 data = hdr_desc.hdr_ext.data;
1367 tmp = tmp_len > 29 ? 29 : tmp_len;
1368 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1369 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1370 hdr_desc.hdr_ext.len = tmp;
1371 } else {
1372 data = hdr_desc.hdr.data;
1373 tmp = tmp_len > 24 ? 24 : tmp_len;
1374 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1375 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1376 hdr_desc.hdr.len = tmp;
1377 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1378 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1379 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1380 hdr_desc.hdr.flag = hdr_field << 1;
1381 }
1382 memcpy(data, cur, tmp);
1383 tmp_len -= tmp;
1384 *scrq_arr = hdr_desc;
1385 scrq_arr++;
1386 num_descs++;
1387 }
1388
1389 return num_descs;
1390 }
1391
1392 /**
1393 * build_hdr_descs_arr - build a header descriptor array
1394 * @skb - socket buffer
1395 * @num_entries - number of descriptors to be sent
1396 * @subcrq - first TX descriptor
1397 * @hdr_field - bit field determining which headers will be sent
1398 *
1399 * This function will build a TX descriptor array with applicable
1400 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1401 */
1402
1403 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1404 int *num_entries, u8 hdr_field)
1405 {
1406 int hdr_len[3] = {0, 0, 0};
1407 int tot_len;
1408 u8 *hdr_data = txbuff->hdr_data;
1409
1410 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1411 txbuff->hdr_data);
1412 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1413 txbuff->indir_arr + 1);
1414 }
1415
1416 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1417 struct net_device *netdev)
1418 {
1419 /* For some backing devices, mishandling of small packets
1420 * can result in a loss of connection or TX stall. Device
1421 * architects recommend that no packet should be smaller
1422 * than the minimum MTU value provided to the driver, so
1423 * pad any packets to that length
1424 */
1425 if (skb->len < netdev->min_mtu)
1426 return skb_put_padto(skb, netdev->min_mtu);
1427
1428 return 0;
1429 }
1430
1431 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1432 {
1433 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1434 int queue_num = skb_get_queue_mapping(skb);
1435 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1436 struct device *dev = &adapter->vdev->dev;
1437 struct ibmvnic_tx_buff *tx_buff = NULL;
1438 struct ibmvnic_sub_crq_queue *tx_scrq;
1439 struct ibmvnic_tx_pool *tx_pool;
1440 unsigned int tx_send_failed = 0;
1441 unsigned int tx_map_failed = 0;
1442 unsigned int tx_dropped = 0;
1443 unsigned int tx_packets = 0;
1444 unsigned int tx_bytes = 0;
1445 dma_addr_t data_dma_addr;
1446 struct netdev_queue *txq;
1447 unsigned long lpar_rc;
1448 union sub_crq tx_crq;
1449 unsigned int offset;
1450 int num_entries = 1;
1451 unsigned char *dst;
1452 u64 *handle_array;
1453 int index = 0;
1454 u8 proto = 0;
1455 netdev_tx_t ret = NETDEV_TX_OK;
1456
1457 if (adapter->resetting) {
1458 if (!netif_subqueue_stopped(netdev, skb))
1459 netif_stop_subqueue(netdev, queue_num);
1460 dev_kfree_skb_any(skb);
1461
1462 tx_send_failed++;
1463 tx_dropped++;
1464 ret = NETDEV_TX_OK;
1465 goto out;
1466 }
1467
1468 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1469 tx_dropped++;
1470 tx_send_failed++;
1471 ret = NETDEV_TX_OK;
1472 goto out;
1473 }
1474 if (skb_is_gso(skb))
1475 tx_pool = &adapter->tso_pool[queue_num];
1476 else
1477 tx_pool = &adapter->tx_pool[queue_num];
1478
1479 tx_scrq = adapter->tx_scrq[queue_num];
1480 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1481 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1482 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1483
1484 index = tx_pool->free_map[tx_pool->consumer_index];
1485
1486 if (index == IBMVNIC_INVALID_MAP) {
1487 dev_kfree_skb_any(skb);
1488 tx_send_failed++;
1489 tx_dropped++;
1490 ret = NETDEV_TX_OK;
1491 goto out;
1492 }
1493
1494 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1495
1496 offset = index * tx_pool->buf_size;
1497 dst = tx_pool->long_term_buff.buff + offset;
1498 memset(dst, 0, tx_pool->buf_size);
1499 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1500
1501 if (skb_shinfo(skb)->nr_frags) {
1502 int cur, i;
1503
1504 /* Copy the head */
1505 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1506 cur = skb_headlen(skb);
1507
1508 /* Copy the frags */
1509 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1510 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1511
1512 memcpy(dst + cur,
1513 page_address(skb_frag_page(frag)) +
1514 frag->page_offset, skb_frag_size(frag));
1515 cur += skb_frag_size(frag);
1516 }
1517 } else {
1518 skb_copy_from_linear_data(skb, dst, skb->len);
1519 }
1520
1521 tx_pool->consumer_index =
1522 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1523
1524 tx_buff = &tx_pool->tx_buff[index];
1525 tx_buff->skb = skb;
1526 tx_buff->data_dma[0] = data_dma_addr;
1527 tx_buff->data_len[0] = skb->len;
1528 tx_buff->index = index;
1529 tx_buff->pool_index = queue_num;
1530 tx_buff->last_frag = true;
1531
1532 memset(&tx_crq, 0, sizeof(tx_crq));
1533 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1534 tx_crq.v1.type = IBMVNIC_TX_DESC;
1535 tx_crq.v1.n_crq_elem = 1;
1536 tx_crq.v1.n_sge = 1;
1537 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1538
1539 if (skb_is_gso(skb))
1540 tx_crq.v1.correlator =
1541 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1542 else
1543 tx_crq.v1.correlator = cpu_to_be32(index);
1544 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1545 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1546 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1547
1548 if (adapter->vlan_header_insertion) {
1549 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1550 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1551 }
1552
1553 if (skb->protocol == htons(ETH_P_IP)) {
1554 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1555 proto = ip_hdr(skb)->protocol;
1556 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1557 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1558 proto = ipv6_hdr(skb)->nexthdr;
1559 }
1560
1561 if (proto == IPPROTO_TCP)
1562 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1563 else if (proto == IPPROTO_UDP)
1564 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1565
1566 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1567 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1568 hdrs += 2;
1569 }
1570 if (skb_is_gso(skb)) {
1571 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1572 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1573 hdrs += 2;
1574 }
1575 /* determine if l2/3/4 headers are sent to firmware */
1576 if ((*hdrs >> 7) & 1) {
1577 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1578 tx_crq.v1.n_crq_elem = num_entries;
1579 tx_buff->num_entries = num_entries;
1580 tx_buff->indir_arr[0] = tx_crq;
1581 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1582 sizeof(tx_buff->indir_arr),
1583 DMA_TO_DEVICE);
1584 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1585 dev_kfree_skb_any(skb);
1586 tx_buff->skb = NULL;
1587 if (!firmware_has_feature(FW_FEATURE_CMO))
1588 dev_err(dev, "tx: unable to map descriptor array\n");
1589 tx_map_failed++;
1590 tx_dropped++;
1591 ret = NETDEV_TX_OK;
1592 goto tx_err_out;
1593 }
1594 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1595 (u64)tx_buff->indir_dma,
1596 (u64)num_entries);
1597 } else {
1598 tx_buff->num_entries = num_entries;
1599 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1600 &tx_crq);
1601 }
1602 if (lpar_rc != H_SUCCESS) {
1603 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1604 dev_err_ratelimited(dev, "tx: send failed\n");
1605 dev_kfree_skb_any(skb);
1606 tx_buff->skb = NULL;
1607
1608 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1609 /* Disable TX and report carrier off if queue is closed
1610 * or pending failover.
1611 * Firmware guarantees that a signal will be sent to the
1612 * driver, triggering a reset or some other action.
1613 */
1614 netif_tx_stop_all_queues(netdev);
1615 netif_carrier_off(netdev);
1616 }
1617
1618 tx_send_failed++;
1619 tx_dropped++;
1620 ret = NETDEV_TX_OK;
1621 goto tx_err_out;
1622 }
1623
1624 if (atomic_add_return(num_entries, &tx_scrq->used)
1625 >= adapter->req_tx_entries_per_subcrq) {
1626 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1627 netif_stop_subqueue(netdev, queue_num);
1628 }
1629
1630 tx_packets++;
1631 tx_bytes += skb->len;
1632 txq->trans_start = jiffies;
1633 ret = NETDEV_TX_OK;
1634 goto out;
1635
1636 tx_err_out:
1637 /* roll back consumer index and map array*/
1638 if (tx_pool->consumer_index == 0)
1639 tx_pool->consumer_index =
1640 tx_pool->num_buffers - 1;
1641 else
1642 tx_pool->consumer_index--;
1643 tx_pool->free_map[tx_pool->consumer_index] = index;
1644 out:
1645 netdev->stats.tx_dropped += tx_dropped;
1646 netdev->stats.tx_bytes += tx_bytes;
1647 netdev->stats.tx_packets += tx_packets;
1648 adapter->tx_send_failed += tx_send_failed;
1649 adapter->tx_map_failed += tx_map_failed;
1650 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1651 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1652 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1653
1654 return ret;
1655 }
1656
1657 static void ibmvnic_set_multi(struct net_device *netdev)
1658 {
1659 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1660 struct netdev_hw_addr *ha;
1661 union ibmvnic_crq crq;
1662
1663 memset(&crq, 0, sizeof(crq));
1664 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1665 crq.request_capability.cmd = REQUEST_CAPABILITY;
1666
1667 if (netdev->flags & IFF_PROMISC) {
1668 if (!adapter->promisc_supported)
1669 return;
1670 } else {
1671 if (netdev->flags & IFF_ALLMULTI) {
1672 /* Accept all multicast */
1673 memset(&crq, 0, sizeof(crq));
1674 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1675 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1676 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1677 ibmvnic_send_crq(adapter, &crq);
1678 } else if (netdev_mc_empty(netdev)) {
1679 /* Reject all multicast */
1680 memset(&crq, 0, sizeof(crq));
1681 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1682 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1683 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1684 ibmvnic_send_crq(adapter, &crq);
1685 } else {
1686 /* Accept one or more multicast(s) */
1687 netdev_for_each_mc_addr(ha, netdev) {
1688 memset(&crq, 0, sizeof(crq));
1689 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1690 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1691 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1692 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1693 ha->addr);
1694 ibmvnic_send_crq(adapter, &crq);
1695 }
1696 }
1697 }
1698 }
1699
1700 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1701 {
1702 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1703 struct sockaddr *addr = p;
1704 union ibmvnic_crq crq;
1705 int rc;
1706
1707 if (!is_valid_ether_addr(addr->sa_data))
1708 return -EADDRNOTAVAIL;
1709
1710 memset(&crq, 0, sizeof(crq));
1711 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1712 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1713 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1714
1715 init_completion(&adapter->fw_done);
1716 rc = ibmvnic_send_crq(adapter, &crq);
1717 if (rc)
1718 return rc;
1719 wait_for_completion(&adapter->fw_done);
1720 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1721 return adapter->fw_done_rc ? -EIO : 0;
1722 }
1723
1724 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1725 {
1726 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1727 struct sockaddr *addr = p;
1728 int rc;
1729
1730 if (adapter->state == VNIC_PROBED) {
1731 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1732 adapter->mac_change_pending = true;
1733 return 0;
1734 }
1735
1736 rc = __ibmvnic_set_mac(netdev, addr);
1737
1738 return rc;
1739 }
1740
1741 /**
1742 * do_reset returns zero if we are able to keep processing reset events, or
1743 * non-zero if we hit a fatal error and must halt.
1744 */
1745 static int do_reset(struct ibmvnic_adapter *adapter,
1746 struct ibmvnic_rwi *rwi, u32 reset_state)
1747 {
1748 u64 old_num_rx_queues, old_num_tx_queues;
1749 struct net_device *netdev = adapter->netdev;
1750 int i, rc;
1751
1752 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1753 rwi->reset_reason);
1754
1755 netif_carrier_off(netdev);
1756 adapter->reset_reason = rwi->reset_reason;
1757
1758 old_num_rx_queues = adapter->req_rx_queues;
1759 old_num_tx_queues = adapter->req_tx_queues;
1760
1761 ibmvnic_cleanup(netdev);
1762
1763 if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1764 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1765 rc = __ibmvnic_close(netdev);
1766 if (rc)
1767 return rc;
1768 }
1769
1770 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1771 adapter->wait_for_reset) {
1772 release_resources(adapter);
1773 release_sub_crqs(adapter, 1);
1774 release_crq_queue(adapter);
1775 }
1776
1777 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1778 /* remove the closed state so when we call open it appears
1779 * we are coming from the probed state.
1780 */
1781 adapter->state = VNIC_PROBED;
1782
1783 if (adapter->wait_for_reset) {
1784 rc = init_crq_queue(adapter);
1785 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1786 rc = ibmvnic_reenable_crq_queue(adapter);
1787 release_sub_crqs(adapter, 1);
1788 } else {
1789 rc = ibmvnic_reset_crq(adapter);
1790 if (!rc)
1791 rc = vio_enable_interrupts(adapter->vdev);
1792 }
1793
1794 if (rc) {
1795 netdev_err(adapter->netdev,
1796 "Couldn't initialize crq. rc=%d\n", rc);
1797 return rc;
1798 }
1799
1800 rc = ibmvnic_reset_init(adapter);
1801 if (rc)
1802 return IBMVNIC_INIT_FAILED;
1803
1804 /* If the adapter was in PROBE state prior to the reset,
1805 * exit here.
1806 */
1807 if (reset_state == VNIC_PROBED)
1808 return 0;
1809
1810 rc = ibmvnic_login(netdev);
1811 if (rc) {
1812 adapter->state = reset_state;
1813 return rc;
1814 }
1815
1816 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1817 adapter->wait_for_reset) {
1818 rc = init_resources(adapter);
1819 if (rc)
1820 return rc;
1821 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1822 adapter->req_tx_queues != old_num_tx_queues) {
1823 adapter->map_id = 1;
1824 release_rx_pools(adapter);
1825 release_tx_pools(adapter);
1826 rc = init_rx_pools(netdev);
1827 if (rc)
1828 return rc;
1829 rc = init_tx_pools(netdev);
1830 if (rc)
1831 return rc;
1832
1833 release_napi(adapter);
1834 rc = init_napi(adapter);
1835 if (rc)
1836 return rc;
1837 } else {
1838 rc = reset_tx_pools(adapter);
1839 if (rc)
1840 return rc;
1841
1842 rc = reset_rx_pools(adapter);
1843 if (rc)
1844 return rc;
1845 }
1846 ibmvnic_disable_irqs(adapter);
1847 }
1848 adapter->state = VNIC_CLOSED;
1849
1850 if (reset_state == VNIC_CLOSED)
1851 return 0;
1852
1853 rc = __ibmvnic_open(netdev);
1854 if (rc) {
1855 if (list_empty(&adapter->rwi_list))
1856 adapter->state = VNIC_CLOSED;
1857 else
1858 adapter->state = reset_state;
1859
1860 return 0;
1861 }
1862
1863 /* kick napi */
1864 for (i = 0; i < adapter->req_rx_queues; i++)
1865 napi_schedule(&adapter->napi[i]);
1866
1867 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1868 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1869 netdev_notify_peers(netdev);
1870
1871 netif_carrier_on(netdev);
1872
1873 return 0;
1874 }
1875
1876 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1877 struct ibmvnic_rwi *rwi, u32 reset_state)
1878 {
1879 struct net_device *netdev = adapter->netdev;
1880 int rc;
1881
1882 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1883 rwi->reset_reason);
1884
1885 netif_carrier_off(netdev);
1886 adapter->reset_reason = rwi->reset_reason;
1887
1888 ibmvnic_cleanup(netdev);
1889 release_resources(adapter);
1890 release_sub_crqs(adapter, 0);
1891 release_crq_queue(adapter);
1892
1893 /* remove the closed state so when we call open it appears
1894 * we are coming from the probed state.
1895 */
1896 adapter->state = VNIC_PROBED;
1897
1898 rc = init_crq_queue(adapter);
1899 if (rc) {
1900 netdev_err(adapter->netdev,
1901 "Couldn't initialize crq. rc=%d\n", rc);
1902 return rc;
1903 }
1904
1905 rc = ibmvnic_init(adapter);
1906 if (rc)
1907 return rc;
1908
1909 /* If the adapter was in PROBE state prior to the reset,
1910 * exit here.
1911 */
1912 if (reset_state == VNIC_PROBED)
1913 return 0;
1914
1915 rc = ibmvnic_login(netdev);
1916 if (rc) {
1917 adapter->state = VNIC_PROBED;
1918 return 0;
1919 }
1920 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1921 * unless wait_for_reset is set, in which case the rtnl lock
1922 * has already been taken before initializing the reset
1923 */
1924 if (!adapter->wait_for_reset) {
1925 rtnl_lock();
1926 rc = init_resources(adapter);
1927 rtnl_unlock();
1928 } else {
1929 rc = init_resources(adapter);
1930 }
1931 if (rc)
1932 return rc;
1933
1934 ibmvnic_disable_irqs(adapter);
1935 adapter->state = VNIC_CLOSED;
1936
1937 if (reset_state == VNIC_CLOSED)
1938 return 0;
1939
1940 rc = __ibmvnic_open(netdev);
1941 if (rc) {
1942 if (list_empty(&adapter->rwi_list))
1943 adapter->state = VNIC_CLOSED;
1944 else
1945 adapter->state = reset_state;
1946
1947 return 0;
1948 }
1949
1950 netif_carrier_on(netdev);
1951
1952 return 0;
1953 }
1954
1955 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1956 {
1957 struct ibmvnic_rwi *rwi;
1958
1959 mutex_lock(&adapter->rwi_lock);
1960
1961 if (!list_empty(&adapter->rwi_list)) {
1962 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1963 list);
1964 list_del(&rwi->list);
1965 } else {
1966 rwi = NULL;
1967 }
1968
1969 mutex_unlock(&adapter->rwi_lock);
1970 return rwi;
1971 }
1972
1973 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1974 {
1975 struct ibmvnic_rwi *rwi;
1976
1977 rwi = get_next_rwi(adapter);
1978 while (rwi) {
1979 kfree(rwi);
1980 rwi = get_next_rwi(adapter);
1981 }
1982 }
1983
1984 static void __ibmvnic_reset(struct work_struct *work)
1985 {
1986 struct ibmvnic_rwi *rwi;
1987 struct ibmvnic_adapter *adapter;
1988 struct net_device *netdev;
1989 u32 reset_state;
1990 int rc = 0;
1991
1992 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1993 netdev = adapter->netdev;
1994
1995 mutex_lock(&adapter->reset_lock);
1996 reset_state = adapter->state;
1997
1998 rwi = get_next_rwi(adapter);
1999 while (rwi) {
2000 if (adapter->force_reset_recovery) {
2001 adapter->force_reset_recovery = false;
2002 rc = do_hard_reset(adapter, rwi, reset_state);
2003 } else {
2004 rc = do_reset(adapter, rwi, reset_state);
2005 }
2006 kfree(rwi);
2007 if (rc && rc != IBMVNIC_INIT_FAILED &&
2008 !adapter->force_reset_recovery)
2009 break;
2010
2011 rwi = get_next_rwi(adapter);
2012 }
2013
2014 if (adapter->wait_for_reset) {
2015 adapter->wait_for_reset = false;
2016 adapter->reset_done_rc = rc;
2017 complete(&adapter->reset_done);
2018 }
2019
2020 if (rc) {
2021 netdev_dbg(adapter->netdev, "Reset failed\n");
2022 free_all_rwi(adapter);
2023 mutex_unlock(&adapter->reset_lock);
2024 return;
2025 }
2026
2027 adapter->resetting = false;
2028 mutex_unlock(&adapter->reset_lock);
2029 }
2030
2031 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2032 enum ibmvnic_reset_reason reason)
2033 {
2034 struct list_head *entry, *tmp_entry;
2035 struct ibmvnic_rwi *rwi, *tmp;
2036 struct net_device *netdev = adapter->netdev;
2037 int ret;
2038
2039 if (adapter->state == VNIC_REMOVING ||
2040 adapter->state == VNIC_REMOVED ||
2041 adapter->failover_pending) {
2042 ret = EBUSY;
2043 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2044 goto err;
2045 }
2046
2047 if (adapter->state == VNIC_PROBING) {
2048 netdev_warn(netdev, "Adapter reset during probe\n");
2049 ret = adapter->init_done_rc = EAGAIN;
2050 goto err;
2051 }
2052
2053 mutex_lock(&adapter->rwi_lock);
2054
2055 list_for_each(entry, &adapter->rwi_list) {
2056 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2057 if (tmp->reset_reason == reason) {
2058 netdev_dbg(netdev, "Skipping matching reset\n");
2059 mutex_unlock(&adapter->rwi_lock);
2060 ret = EBUSY;
2061 goto err;
2062 }
2063 }
2064
2065 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
2066 if (!rwi) {
2067 mutex_unlock(&adapter->rwi_lock);
2068 ibmvnic_close(netdev);
2069 ret = ENOMEM;
2070 goto err;
2071 }
2072 /* if we just received a transport event,
2073 * flush reset queue and process this reset
2074 */
2075 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2076 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2077 list_del(entry);
2078 }
2079 rwi->reset_reason = reason;
2080 list_add_tail(&rwi->list, &adapter->rwi_list);
2081 mutex_unlock(&adapter->rwi_lock);
2082 adapter->resetting = true;
2083 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2084 schedule_work(&adapter->ibmvnic_reset);
2085
2086 return 0;
2087 err:
2088 if (adapter->wait_for_reset)
2089 adapter->wait_for_reset = false;
2090 return -ret;
2091 }
2092
2093 static void ibmvnic_tx_timeout(struct net_device *dev)
2094 {
2095 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2096
2097 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2098 }
2099
2100 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2101 struct ibmvnic_rx_buff *rx_buff)
2102 {
2103 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2104
2105 rx_buff->skb = NULL;
2106
2107 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2108 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2109
2110 atomic_dec(&pool->available);
2111 }
2112
2113 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2114 {
2115 struct net_device *netdev = napi->dev;
2116 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2117 int scrq_num = (int)(napi - adapter->napi);
2118 int frames_processed = 0;
2119
2120 restart_poll:
2121 while (frames_processed < budget) {
2122 struct sk_buff *skb;
2123 struct ibmvnic_rx_buff *rx_buff;
2124 union sub_crq *next;
2125 u32 length;
2126 u16 offset;
2127 u8 flags = 0;
2128
2129 if (unlikely(adapter->resetting &&
2130 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2131 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2132 napi_complete_done(napi, frames_processed);
2133 return frames_processed;
2134 }
2135
2136 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2137 break;
2138 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2139 rx_buff =
2140 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2141 rx_comp.correlator);
2142 /* do error checking */
2143 if (next->rx_comp.rc) {
2144 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2145 be16_to_cpu(next->rx_comp.rc));
2146 /* free the entry */
2147 next->rx_comp.first = 0;
2148 dev_kfree_skb_any(rx_buff->skb);
2149 remove_buff_from_pool(adapter, rx_buff);
2150 continue;
2151 } else if (!rx_buff->skb) {
2152 /* free the entry */
2153 next->rx_comp.first = 0;
2154 remove_buff_from_pool(adapter, rx_buff);
2155 continue;
2156 }
2157
2158 length = be32_to_cpu(next->rx_comp.len);
2159 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2160 flags = next->rx_comp.flags;
2161 skb = rx_buff->skb;
2162 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2163 length);
2164
2165 /* VLAN Header has been stripped by the system firmware and
2166 * needs to be inserted by the driver
2167 */
2168 if (adapter->rx_vlan_header_insertion &&
2169 (flags & IBMVNIC_VLAN_STRIPPED))
2170 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2171 ntohs(next->rx_comp.vlan_tci));
2172
2173 /* free the entry */
2174 next->rx_comp.first = 0;
2175 remove_buff_from_pool(adapter, rx_buff);
2176
2177 skb_put(skb, length);
2178 skb->protocol = eth_type_trans(skb, netdev);
2179 skb_record_rx_queue(skb, scrq_num);
2180
2181 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2182 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2183 skb->ip_summed = CHECKSUM_UNNECESSARY;
2184 }
2185
2186 length = skb->len;
2187 napi_gro_receive(napi, skb); /* send it up */
2188 netdev->stats.rx_packets++;
2189 netdev->stats.rx_bytes += length;
2190 adapter->rx_stats_buffers[scrq_num].packets++;
2191 adapter->rx_stats_buffers[scrq_num].bytes += length;
2192 frames_processed++;
2193 }
2194
2195 if (adapter->state != VNIC_CLOSING)
2196 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2197
2198 if (frames_processed < budget) {
2199 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2200 napi_complete_done(napi, frames_processed);
2201 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2202 napi_reschedule(napi)) {
2203 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2204 goto restart_poll;
2205 }
2206 }
2207 return frames_processed;
2208 }
2209
2210 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2211 {
2212 int rc, ret;
2213
2214 adapter->fallback.mtu = adapter->req_mtu;
2215 adapter->fallback.rx_queues = adapter->req_rx_queues;
2216 adapter->fallback.tx_queues = adapter->req_tx_queues;
2217 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2218 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2219
2220 init_completion(&adapter->reset_done);
2221 adapter->wait_for_reset = true;
2222 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2223 if (rc)
2224 return rc;
2225 wait_for_completion(&adapter->reset_done);
2226
2227 ret = 0;
2228 if (adapter->reset_done_rc) {
2229 ret = -EIO;
2230 adapter->desired.mtu = adapter->fallback.mtu;
2231 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2232 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2233 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2234 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2235
2236 init_completion(&adapter->reset_done);
2237 adapter->wait_for_reset = true;
2238 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2239 if (rc)
2240 return ret;
2241 wait_for_completion(&adapter->reset_done);
2242 }
2243 adapter->wait_for_reset = false;
2244
2245 return ret;
2246 }
2247
2248 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2249 {
2250 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2251
2252 adapter->desired.mtu = new_mtu + ETH_HLEN;
2253
2254 return wait_for_reset(adapter);
2255 }
2256
2257 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2258 struct net_device *dev,
2259 netdev_features_t features)
2260 {
2261 /* Some backing hardware adapters can not
2262 * handle packets with a MSS less than 224
2263 * or with only one segment.
2264 */
2265 if (skb_is_gso(skb)) {
2266 if (skb_shinfo(skb)->gso_size < 224 ||
2267 skb_shinfo(skb)->gso_segs == 1)
2268 features &= ~NETIF_F_GSO_MASK;
2269 }
2270
2271 return features;
2272 }
2273
2274 static const struct net_device_ops ibmvnic_netdev_ops = {
2275 .ndo_open = ibmvnic_open,
2276 .ndo_stop = ibmvnic_close,
2277 .ndo_start_xmit = ibmvnic_xmit,
2278 .ndo_set_rx_mode = ibmvnic_set_multi,
2279 .ndo_set_mac_address = ibmvnic_set_mac,
2280 .ndo_validate_addr = eth_validate_addr,
2281 .ndo_tx_timeout = ibmvnic_tx_timeout,
2282 .ndo_change_mtu = ibmvnic_change_mtu,
2283 .ndo_features_check = ibmvnic_features_check,
2284 };
2285
2286 /* ethtool functions */
2287
2288 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2289 struct ethtool_link_ksettings *cmd)
2290 {
2291 u32 supported, advertising;
2292
2293 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2294 SUPPORTED_FIBRE);
2295 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2296 ADVERTISED_FIBRE);
2297 cmd->base.speed = SPEED_1000;
2298 cmd->base.duplex = DUPLEX_FULL;
2299 cmd->base.port = PORT_FIBRE;
2300 cmd->base.phy_address = 0;
2301 cmd->base.autoneg = AUTONEG_ENABLE;
2302
2303 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2304 supported);
2305 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2306 advertising);
2307
2308 return 0;
2309 }
2310
2311 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2312 struct ethtool_drvinfo *info)
2313 {
2314 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2315
2316 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2317 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2318 strlcpy(info->fw_version, adapter->fw_version,
2319 sizeof(info->fw_version));
2320 }
2321
2322 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2323 {
2324 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2325
2326 return adapter->msg_enable;
2327 }
2328
2329 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2330 {
2331 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2332
2333 adapter->msg_enable = data;
2334 }
2335
2336 static u32 ibmvnic_get_link(struct net_device *netdev)
2337 {
2338 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2339
2340 /* Don't need to send a query because we request a logical link up at
2341 * init and then we wait for link state indications
2342 */
2343 return adapter->logical_link_state;
2344 }
2345
2346 static void ibmvnic_get_ringparam(struct net_device *netdev,
2347 struct ethtool_ringparam *ring)
2348 {
2349 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2350
2351 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2352 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2353 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2354 } else {
2355 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2356 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2357 }
2358 ring->rx_mini_max_pending = 0;
2359 ring->rx_jumbo_max_pending = 0;
2360 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2361 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2362 ring->rx_mini_pending = 0;
2363 ring->rx_jumbo_pending = 0;
2364 }
2365
2366 static int ibmvnic_set_ringparam(struct net_device *netdev,
2367 struct ethtool_ringparam *ring)
2368 {
2369 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2370 int ret;
2371
2372 ret = 0;
2373 adapter->desired.rx_entries = ring->rx_pending;
2374 adapter->desired.tx_entries = ring->tx_pending;
2375
2376 ret = wait_for_reset(adapter);
2377
2378 if (!ret &&
2379 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2380 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2381 netdev_info(netdev,
2382 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2383 ring->rx_pending, ring->tx_pending,
2384 adapter->req_rx_add_entries_per_subcrq,
2385 adapter->req_tx_entries_per_subcrq);
2386 return ret;
2387 }
2388
2389 static void ibmvnic_get_channels(struct net_device *netdev,
2390 struct ethtool_channels *channels)
2391 {
2392 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2393
2394 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2395 channels->max_rx = adapter->max_rx_queues;
2396 channels->max_tx = adapter->max_tx_queues;
2397 } else {
2398 channels->max_rx = IBMVNIC_MAX_QUEUES;
2399 channels->max_tx = IBMVNIC_MAX_QUEUES;
2400 }
2401
2402 channels->max_other = 0;
2403 channels->max_combined = 0;
2404 channels->rx_count = adapter->req_rx_queues;
2405 channels->tx_count = adapter->req_tx_queues;
2406 channels->other_count = 0;
2407 channels->combined_count = 0;
2408 }
2409
2410 static int ibmvnic_set_channels(struct net_device *netdev,
2411 struct ethtool_channels *channels)
2412 {
2413 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2414 int ret;
2415
2416 ret = 0;
2417 adapter->desired.rx_queues = channels->rx_count;
2418 adapter->desired.tx_queues = channels->tx_count;
2419
2420 ret = wait_for_reset(adapter);
2421
2422 if (!ret &&
2423 (adapter->req_rx_queues != channels->rx_count ||
2424 adapter->req_tx_queues != channels->tx_count))
2425 netdev_info(netdev,
2426 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2427 channels->rx_count, channels->tx_count,
2428 adapter->req_rx_queues, adapter->req_tx_queues);
2429 return ret;
2430
2431 }
2432
2433 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2434 {
2435 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2436 int i;
2437
2438 switch (stringset) {
2439 case ETH_SS_STATS:
2440 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2441 i++, data += ETH_GSTRING_LEN)
2442 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2443
2444 for (i = 0; i < adapter->req_tx_queues; i++) {
2445 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2446 data += ETH_GSTRING_LEN;
2447
2448 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2449 data += ETH_GSTRING_LEN;
2450
2451 snprintf(data, ETH_GSTRING_LEN,
2452 "tx%d_dropped_packets", i);
2453 data += ETH_GSTRING_LEN;
2454 }
2455
2456 for (i = 0; i < adapter->req_rx_queues; i++) {
2457 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2458 data += ETH_GSTRING_LEN;
2459
2460 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2461 data += ETH_GSTRING_LEN;
2462
2463 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2464 data += ETH_GSTRING_LEN;
2465 }
2466 break;
2467
2468 case ETH_SS_PRIV_FLAGS:
2469 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2470 strcpy(data + i * ETH_GSTRING_LEN,
2471 ibmvnic_priv_flags[i]);
2472 break;
2473 default:
2474 return;
2475 }
2476 }
2477
2478 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2479 {
2480 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2481
2482 switch (sset) {
2483 case ETH_SS_STATS:
2484 return ARRAY_SIZE(ibmvnic_stats) +
2485 adapter->req_tx_queues * NUM_TX_STATS +
2486 adapter->req_rx_queues * NUM_RX_STATS;
2487 case ETH_SS_PRIV_FLAGS:
2488 return ARRAY_SIZE(ibmvnic_priv_flags);
2489 default:
2490 return -EOPNOTSUPP;
2491 }
2492 }
2493
2494 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2495 struct ethtool_stats *stats, u64 *data)
2496 {
2497 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2498 union ibmvnic_crq crq;
2499 int i, j;
2500 int rc;
2501
2502 memset(&crq, 0, sizeof(crq));
2503 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2504 crq.request_statistics.cmd = REQUEST_STATISTICS;
2505 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2506 crq.request_statistics.len =
2507 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2508
2509 /* Wait for data to be written */
2510 init_completion(&adapter->stats_done);
2511 rc = ibmvnic_send_crq(adapter, &crq);
2512 if (rc)
2513 return;
2514 wait_for_completion(&adapter->stats_done);
2515
2516 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2517 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2518 ibmvnic_stats[i].offset));
2519
2520 for (j = 0; j < adapter->req_tx_queues; j++) {
2521 data[i] = adapter->tx_stats_buffers[j].packets;
2522 i++;
2523 data[i] = adapter->tx_stats_buffers[j].bytes;
2524 i++;
2525 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2526 i++;
2527 }
2528
2529 for (j = 0; j < adapter->req_rx_queues; j++) {
2530 data[i] = adapter->rx_stats_buffers[j].packets;
2531 i++;
2532 data[i] = adapter->rx_stats_buffers[j].bytes;
2533 i++;
2534 data[i] = adapter->rx_stats_buffers[j].interrupts;
2535 i++;
2536 }
2537 }
2538
2539 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2540 {
2541 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2542
2543 return adapter->priv_flags;
2544 }
2545
2546 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2547 {
2548 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2549 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2550
2551 if (which_maxes)
2552 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2553 else
2554 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2555
2556 return 0;
2557 }
2558 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2559 .get_drvinfo = ibmvnic_get_drvinfo,
2560 .get_msglevel = ibmvnic_get_msglevel,
2561 .set_msglevel = ibmvnic_set_msglevel,
2562 .get_link = ibmvnic_get_link,
2563 .get_ringparam = ibmvnic_get_ringparam,
2564 .set_ringparam = ibmvnic_set_ringparam,
2565 .get_channels = ibmvnic_get_channels,
2566 .set_channels = ibmvnic_set_channels,
2567 .get_strings = ibmvnic_get_strings,
2568 .get_sset_count = ibmvnic_get_sset_count,
2569 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2570 .get_link_ksettings = ibmvnic_get_link_ksettings,
2571 .get_priv_flags = ibmvnic_get_priv_flags,
2572 .set_priv_flags = ibmvnic_set_priv_flags,
2573 };
2574
2575 /* Routines for managing CRQs/sCRQs */
2576
2577 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2578 struct ibmvnic_sub_crq_queue *scrq)
2579 {
2580 int rc;
2581
2582 if (scrq->irq) {
2583 free_irq(scrq->irq, scrq);
2584 irq_dispose_mapping(scrq->irq);
2585 scrq->irq = 0;
2586 }
2587
2588 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2589 atomic_set(&scrq->used, 0);
2590 scrq->cur = 0;
2591
2592 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2593 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2594 return rc;
2595 }
2596
2597 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2598 {
2599 int i, rc;
2600
2601 for (i = 0; i < adapter->req_tx_queues; i++) {
2602 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2603 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2604 if (rc)
2605 return rc;
2606 }
2607
2608 for (i = 0; i < adapter->req_rx_queues; i++) {
2609 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2610 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2611 if (rc)
2612 return rc;
2613 }
2614
2615 return rc;
2616 }
2617
2618 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2619 struct ibmvnic_sub_crq_queue *scrq,
2620 bool do_h_free)
2621 {
2622 struct device *dev = &adapter->vdev->dev;
2623 long rc;
2624
2625 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2626
2627 if (do_h_free) {
2628 /* Close the sub-crqs */
2629 do {
2630 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2631 adapter->vdev->unit_address,
2632 scrq->crq_num);
2633 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2634
2635 if (rc) {
2636 netdev_err(adapter->netdev,
2637 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2638 scrq->crq_num, rc);
2639 }
2640 }
2641
2642 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2643 DMA_BIDIRECTIONAL);
2644 free_pages((unsigned long)scrq->msgs, 2);
2645 kfree(scrq);
2646 }
2647
2648 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2649 *adapter)
2650 {
2651 struct device *dev = &adapter->vdev->dev;
2652 struct ibmvnic_sub_crq_queue *scrq;
2653 int rc;
2654
2655 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2656 if (!scrq)
2657 return NULL;
2658
2659 scrq->msgs =
2660 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2661 if (!scrq->msgs) {
2662 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2663 goto zero_page_failed;
2664 }
2665
2666 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2667 DMA_BIDIRECTIONAL);
2668 if (dma_mapping_error(dev, scrq->msg_token)) {
2669 dev_warn(dev, "Couldn't map crq queue messages page\n");
2670 goto map_failed;
2671 }
2672
2673 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2674 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2675
2676 if (rc == H_RESOURCE)
2677 rc = ibmvnic_reset_crq(adapter);
2678
2679 if (rc == H_CLOSED) {
2680 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2681 } else if (rc) {
2682 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2683 goto reg_failed;
2684 }
2685
2686 scrq->adapter = adapter;
2687 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2688 spin_lock_init(&scrq->lock);
2689
2690 netdev_dbg(adapter->netdev,
2691 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2692 scrq->crq_num, scrq->hw_irq, scrq->irq);
2693
2694 return scrq;
2695
2696 reg_failed:
2697 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2698 DMA_BIDIRECTIONAL);
2699 map_failed:
2700 free_pages((unsigned long)scrq->msgs, 2);
2701 zero_page_failed:
2702 kfree(scrq);
2703
2704 return NULL;
2705 }
2706
2707 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2708 {
2709 int i;
2710
2711 if (adapter->tx_scrq) {
2712 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2713 if (!adapter->tx_scrq[i])
2714 continue;
2715
2716 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2717 i);
2718 if (adapter->tx_scrq[i]->irq) {
2719 free_irq(adapter->tx_scrq[i]->irq,
2720 adapter->tx_scrq[i]);
2721 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2722 adapter->tx_scrq[i]->irq = 0;
2723 }
2724
2725 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2726 do_h_free);
2727 }
2728
2729 kfree(adapter->tx_scrq);
2730 adapter->tx_scrq = NULL;
2731 adapter->num_active_tx_scrqs = 0;
2732 }
2733
2734 if (adapter->rx_scrq) {
2735 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2736 if (!adapter->rx_scrq[i])
2737 continue;
2738
2739 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2740 i);
2741 if (adapter->rx_scrq[i]->irq) {
2742 free_irq(adapter->rx_scrq[i]->irq,
2743 adapter->rx_scrq[i]);
2744 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2745 adapter->rx_scrq[i]->irq = 0;
2746 }
2747
2748 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2749 do_h_free);
2750 }
2751
2752 kfree(adapter->rx_scrq);
2753 adapter->rx_scrq = NULL;
2754 adapter->num_active_rx_scrqs = 0;
2755 }
2756 }
2757
2758 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2759 struct ibmvnic_sub_crq_queue *scrq)
2760 {
2761 struct device *dev = &adapter->vdev->dev;
2762 unsigned long rc;
2763
2764 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2765 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2766 if (rc)
2767 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2768 scrq->hw_irq, rc);
2769 return rc;
2770 }
2771
2772 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2773 struct ibmvnic_sub_crq_queue *scrq)
2774 {
2775 struct device *dev = &adapter->vdev->dev;
2776 unsigned long rc;
2777
2778 if (scrq->hw_irq > 0x100000000ULL) {
2779 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2780 return 1;
2781 }
2782
2783 if (adapter->resetting &&
2784 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2785 u64 val = (0xff000000) | scrq->hw_irq;
2786
2787 rc = plpar_hcall_norets(H_EOI, val);
2788 if (rc)
2789 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2790 val, rc);
2791 }
2792
2793 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2794 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2795 if (rc)
2796 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2797 scrq->hw_irq, rc);
2798 return rc;
2799 }
2800
2801 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2802 struct ibmvnic_sub_crq_queue *scrq)
2803 {
2804 struct device *dev = &adapter->vdev->dev;
2805 struct ibmvnic_tx_pool *tx_pool;
2806 struct ibmvnic_tx_buff *txbuff;
2807 union sub_crq *next;
2808 int index;
2809 int i, j;
2810 u8 *first;
2811
2812 restart_loop:
2813 while (pending_scrq(adapter, scrq)) {
2814 unsigned int pool = scrq->pool_index;
2815 int num_entries = 0;
2816
2817 next = ibmvnic_next_scrq(adapter, scrq);
2818 for (i = 0; i < next->tx_comp.num_comps; i++) {
2819 if (next->tx_comp.rcs[i]) {
2820 dev_err(dev, "tx error %x\n",
2821 next->tx_comp.rcs[i]);
2822 continue;
2823 }
2824 index = be32_to_cpu(next->tx_comp.correlators[i]);
2825 if (index & IBMVNIC_TSO_POOL_MASK) {
2826 tx_pool = &adapter->tso_pool[pool];
2827 index &= ~IBMVNIC_TSO_POOL_MASK;
2828 } else {
2829 tx_pool = &adapter->tx_pool[pool];
2830 }
2831
2832 txbuff = &tx_pool->tx_buff[index];
2833
2834 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2835 if (!txbuff->data_dma[j])
2836 continue;
2837
2838 txbuff->data_dma[j] = 0;
2839 }
2840 /* if sub_crq was sent indirectly */
2841 first = &txbuff->indir_arr[0].generic.first;
2842 if (*first == IBMVNIC_CRQ_CMD) {
2843 dma_unmap_single(dev, txbuff->indir_dma,
2844 sizeof(txbuff->indir_arr),
2845 DMA_TO_DEVICE);
2846 *first = 0;
2847 }
2848
2849 if (txbuff->last_frag) {
2850 dev_kfree_skb_any(txbuff->skb);
2851 txbuff->skb = NULL;
2852 }
2853
2854 num_entries += txbuff->num_entries;
2855
2856 tx_pool->free_map[tx_pool->producer_index] = index;
2857 tx_pool->producer_index =
2858 (tx_pool->producer_index + 1) %
2859 tx_pool->num_buffers;
2860 }
2861 /* remove tx_comp scrq*/
2862 next->tx_comp.first = 0;
2863
2864 if (atomic_sub_return(num_entries, &scrq->used) <=
2865 (adapter->req_tx_entries_per_subcrq / 2) &&
2866 __netif_subqueue_stopped(adapter->netdev,
2867 scrq->pool_index)) {
2868 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2869 netdev_dbg(adapter->netdev, "Started queue %d\n",
2870 scrq->pool_index);
2871 }
2872 }
2873
2874 enable_scrq_irq(adapter, scrq);
2875
2876 if (pending_scrq(adapter, scrq)) {
2877 disable_scrq_irq(adapter, scrq);
2878 goto restart_loop;
2879 }
2880
2881 return 0;
2882 }
2883
2884 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2885 {
2886 struct ibmvnic_sub_crq_queue *scrq = instance;
2887 struct ibmvnic_adapter *adapter = scrq->adapter;
2888
2889 disable_scrq_irq(adapter, scrq);
2890 ibmvnic_complete_tx(adapter, scrq);
2891
2892 return IRQ_HANDLED;
2893 }
2894
2895 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2896 {
2897 struct ibmvnic_sub_crq_queue *scrq = instance;
2898 struct ibmvnic_adapter *adapter = scrq->adapter;
2899
2900 /* When booting a kdump kernel we can hit pending interrupts
2901 * prior to completing driver initialization.
2902 */
2903 if (unlikely(adapter->state != VNIC_OPEN))
2904 return IRQ_NONE;
2905
2906 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2907
2908 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2909 disable_scrq_irq(adapter, scrq);
2910 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2911 }
2912
2913 return IRQ_HANDLED;
2914 }
2915
2916 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2917 {
2918 struct device *dev = &adapter->vdev->dev;
2919 struct ibmvnic_sub_crq_queue *scrq;
2920 int i = 0, j = 0;
2921 int rc = 0;
2922
2923 for (i = 0; i < adapter->req_tx_queues; i++) {
2924 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2925 i);
2926 scrq = adapter->tx_scrq[i];
2927 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2928
2929 if (!scrq->irq) {
2930 rc = -EINVAL;
2931 dev_err(dev, "Error mapping irq\n");
2932 goto req_tx_irq_failed;
2933 }
2934
2935 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2936 0, "ibmvnic_tx", scrq);
2937
2938 if (rc) {
2939 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2940 scrq->irq, rc);
2941 irq_dispose_mapping(scrq->irq);
2942 goto req_tx_irq_failed;
2943 }
2944 }
2945
2946 for (i = 0; i < adapter->req_rx_queues; i++) {
2947 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2948 i);
2949 scrq = adapter->rx_scrq[i];
2950 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2951 if (!scrq->irq) {
2952 rc = -EINVAL;
2953 dev_err(dev, "Error mapping irq\n");
2954 goto req_rx_irq_failed;
2955 }
2956 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2957 0, "ibmvnic_rx", scrq);
2958 if (rc) {
2959 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2960 scrq->irq, rc);
2961 irq_dispose_mapping(scrq->irq);
2962 goto req_rx_irq_failed;
2963 }
2964 }
2965 return rc;
2966
2967 req_rx_irq_failed:
2968 for (j = 0; j < i; j++) {
2969 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2970 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2971 }
2972 i = adapter->req_tx_queues;
2973 req_tx_irq_failed:
2974 for (j = 0; j < i; j++) {
2975 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2976 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2977 }
2978 release_sub_crqs(adapter, 1);
2979 return rc;
2980 }
2981
2982 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2983 {
2984 struct device *dev = &adapter->vdev->dev;
2985 struct ibmvnic_sub_crq_queue **allqueues;
2986 int registered_queues = 0;
2987 int total_queues;
2988 int more = 0;
2989 int i;
2990
2991 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2992
2993 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2994 if (!allqueues)
2995 return -1;
2996
2997 for (i = 0; i < total_queues; i++) {
2998 allqueues[i] = init_sub_crq_queue(adapter);
2999 if (!allqueues[i]) {
3000 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3001 break;
3002 }
3003 registered_queues++;
3004 }
3005
3006 /* Make sure we were able to register the minimum number of queues */
3007 if (registered_queues <
3008 adapter->min_tx_queues + adapter->min_rx_queues) {
3009 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3010 goto tx_failed;
3011 }
3012
3013 /* Distribute the failed allocated queues*/
3014 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3015 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3016 switch (i % 3) {
3017 case 0:
3018 if (adapter->req_rx_queues > adapter->min_rx_queues)
3019 adapter->req_rx_queues--;
3020 else
3021 more++;
3022 break;
3023 case 1:
3024 if (adapter->req_tx_queues > adapter->min_tx_queues)
3025 adapter->req_tx_queues--;
3026 else
3027 more++;
3028 break;
3029 }
3030 }
3031
3032 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3033 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3034 if (!adapter->tx_scrq)
3035 goto tx_failed;
3036
3037 for (i = 0; i < adapter->req_tx_queues; i++) {
3038 adapter->tx_scrq[i] = allqueues[i];
3039 adapter->tx_scrq[i]->pool_index = i;
3040 adapter->num_active_tx_scrqs++;
3041 }
3042
3043 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3044 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3045 if (!adapter->rx_scrq)
3046 goto rx_failed;
3047
3048 for (i = 0; i < adapter->req_rx_queues; i++) {
3049 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3050 adapter->rx_scrq[i]->scrq_num = i;
3051 adapter->num_active_rx_scrqs++;
3052 }
3053
3054 kfree(allqueues);
3055 return 0;
3056
3057 rx_failed:
3058 kfree(adapter->tx_scrq);
3059 adapter->tx_scrq = NULL;
3060 tx_failed:
3061 for (i = 0; i < registered_queues; i++)
3062 release_sub_crq_queue(adapter, allqueues[i], 1);
3063 kfree(allqueues);
3064 return -1;
3065 }
3066
3067 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3068 {
3069 struct device *dev = &adapter->vdev->dev;
3070 union ibmvnic_crq crq;
3071 int max_entries;
3072
3073 if (!retry) {
3074 /* Sub-CRQ entries are 32 byte long */
3075 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3076
3077 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3078 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3079 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3080 return;
3081 }
3082
3083 if (adapter->desired.mtu)
3084 adapter->req_mtu = adapter->desired.mtu;
3085 else
3086 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3087
3088 if (!adapter->desired.tx_entries)
3089 adapter->desired.tx_entries =
3090 adapter->max_tx_entries_per_subcrq;
3091 if (!adapter->desired.rx_entries)
3092 adapter->desired.rx_entries =
3093 adapter->max_rx_add_entries_per_subcrq;
3094
3095 max_entries = IBMVNIC_MAX_LTB_SIZE /
3096 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3097
3098 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3099 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3100 adapter->desired.tx_entries = max_entries;
3101 }
3102
3103 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3104 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3105 adapter->desired.rx_entries = max_entries;
3106 }
3107
3108 if (adapter->desired.tx_entries)
3109 adapter->req_tx_entries_per_subcrq =
3110 adapter->desired.tx_entries;
3111 else
3112 adapter->req_tx_entries_per_subcrq =
3113 adapter->max_tx_entries_per_subcrq;
3114
3115 if (adapter->desired.rx_entries)
3116 adapter->req_rx_add_entries_per_subcrq =
3117 adapter->desired.rx_entries;
3118 else
3119 adapter->req_rx_add_entries_per_subcrq =
3120 adapter->max_rx_add_entries_per_subcrq;
3121
3122 if (adapter->desired.tx_queues)
3123 adapter->req_tx_queues =
3124 adapter->desired.tx_queues;
3125 else
3126 adapter->req_tx_queues =
3127 adapter->opt_tx_comp_sub_queues;
3128
3129 if (adapter->desired.rx_queues)
3130 adapter->req_rx_queues =
3131 adapter->desired.rx_queues;
3132 else
3133 adapter->req_rx_queues =
3134 adapter->opt_rx_comp_queues;
3135
3136 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3137 }
3138
3139 memset(&crq, 0, sizeof(crq));
3140 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3141 crq.request_capability.cmd = REQUEST_CAPABILITY;
3142
3143 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3144 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3145 atomic_inc(&adapter->running_cap_crqs);
3146 ibmvnic_send_crq(adapter, &crq);
3147
3148 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3149 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3150 atomic_inc(&adapter->running_cap_crqs);
3151 ibmvnic_send_crq(adapter, &crq);
3152
3153 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3154 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3155 atomic_inc(&adapter->running_cap_crqs);
3156 ibmvnic_send_crq(adapter, &crq);
3157
3158 crq.request_capability.capability =
3159 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3160 crq.request_capability.number =
3161 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3162 atomic_inc(&adapter->running_cap_crqs);
3163 ibmvnic_send_crq(adapter, &crq);
3164
3165 crq.request_capability.capability =
3166 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3167 crq.request_capability.number =
3168 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3169 atomic_inc(&adapter->running_cap_crqs);
3170 ibmvnic_send_crq(adapter, &crq);
3171
3172 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3173 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3174 atomic_inc(&adapter->running_cap_crqs);
3175 ibmvnic_send_crq(adapter, &crq);
3176
3177 if (adapter->netdev->flags & IFF_PROMISC) {
3178 if (adapter->promisc_supported) {
3179 crq.request_capability.capability =
3180 cpu_to_be16(PROMISC_REQUESTED);
3181 crq.request_capability.number = cpu_to_be64(1);
3182 atomic_inc(&adapter->running_cap_crqs);
3183 ibmvnic_send_crq(adapter, &crq);
3184 }
3185 } else {
3186 crq.request_capability.capability =
3187 cpu_to_be16(PROMISC_REQUESTED);
3188 crq.request_capability.number = cpu_to_be64(0);
3189 atomic_inc(&adapter->running_cap_crqs);
3190 ibmvnic_send_crq(adapter, &crq);
3191 }
3192 }
3193
3194 static int pending_scrq(struct ibmvnic_adapter *adapter,
3195 struct ibmvnic_sub_crq_queue *scrq)
3196 {
3197 union sub_crq *entry = &scrq->msgs[scrq->cur];
3198
3199 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3200 return 1;
3201 else
3202 return 0;
3203 }
3204
3205 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3206 struct ibmvnic_sub_crq_queue *scrq)
3207 {
3208 union sub_crq *entry;
3209 unsigned long flags;
3210
3211 spin_lock_irqsave(&scrq->lock, flags);
3212 entry = &scrq->msgs[scrq->cur];
3213 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3214 if (++scrq->cur == scrq->size)
3215 scrq->cur = 0;
3216 } else {
3217 entry = NULL;
3218 }
3219 spin_unlock_irqrestore(&scrq->lock, flags);
3220
3221 return entry;
3222 }
3223
3224 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3225 {
3226 struct ibmvnic_crq_queue *queue = &adapter->crq;
3227 union ibmvnic_crq *crq;
3228
3229 crq = &queue->msgs[queue->cur];
3230 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3231 if (++queue->cur == queue->size)
3232 queue->cur = 0;
3233 } else {
3234 crq = NULL;
3235 }
3236
3237 return crq;
3238 }
3239
3240 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3241 {
3242 switch (rc) {
3243 case H_PARAMETER:
3244 dev_warn_ratelimited(dev,
3245 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3246 func, rc);
3247 break;
3248 case H_CLOSED:
3249 dev_warn_ratelimited(dev,
3250 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3251 func, rc);
3252 break;
3253 default:
3254 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3255 break;
3256 }
3257 }
3258
3259 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3260 union sub_crq *sub_crq)
3261 {
3262 unsigned int ua = adapter->vdev->unit_address;
3263 struct device *dev = &adapter->vdev->dev;
3264 u64 *u64_crq = (u64 *)sub_crq;
3265 int rc;
3266
3267 netdev_dbg(adapter->netdev,
3268 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3269 (unsigned long int)cpu_to_be64(remote_handle),
3270 (unsigned long int)cpu_to_be64(u64_crq[0]),
3271 (unsigned long int)cpu_to_be64(u64_crq[1]),
3272 (unsigned long int)cpu_to_be64(u64_crq[2]),
3273 (unsigned long int)cpu_to_be64(u64_crq[3]));
3274
3275 /* Make sure the hypervisor sees the complete request */
3276 mb();
3277
3278 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3279 cpu_to_be64(remote_handle),
3280 cpu_to_be64(u64_crq[0]),
3281 cpu_to_be64(u64_crq[1]),
3282 cpu_to_be64(u64_crq[2]),
3283 cpu_to_be64(u64_crq[3]));
3284
3285 if (rc)
3286 print_subcrq_error(dev, rc, __func__);
3287
3288 return rc;
3289 }
3290
3291 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3292 u64 remote_handle, u64 ioba, u64 num_entries)
3293 {
3294 unsigned int ua = adapter->vdev->unit_address;
3295 struct device *dev = &adapter->vdev->dev;
3296 int rc;
3297
3298 /* Make sure the hypervisor sees the complete request */
3299 mb();
3300 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3301 cpu_to_be64(remote_handle),
3302 ioba, num_entries);
3303
3304 if (rc)
3305 print_subcrq_error(dev, rc, __func__);
3306
3307 return rc;
3308 }
3309
3310 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3311 union ibmvnic_crq *crq)
3312 {
3313 unsigned int ua = adapter->vdev->unit_address;
3314 struct device *dev = &adapter->vdev->dev;
3315 u64 *u64_crq = (u64 *)crq;
3316 int rc;
3317
3318 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3319 (unsigned long int)cpu_to_be64(u64_crq[0]),
3320 (unsigned long int)cpu_to_be64(u64_crq[1]));
3321
3322 if (!adapter->crq.active &&
3323 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3324 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3325 return -EINVAL;
3326 }
3327
3328 /* Make sure the hypervisor sees the complete request */
3329 mb();
3330
3331 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3332 cpu_to_be64(u64_crq[0]),
3333 cpu_to_be64(u64_crq[1]));
3334
3335 if (rc) {
3336 if (rc == H_CLOSED) {
3337 dev_warn(dev, "CRQ Queue closed\n");
3338 if (adapter->resetting)
3339 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3340 }
3341
3342 dev_warn(dev, "Send error (rc=%d)\n", rc);
3343 }
3344
3345 return rc;
3346 }
3347
3348 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3349 {
3350 union ibmvnic_crq crq;
3351
3352 memset(&crq, 0, sizeof(crq));
3353 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3354 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3355 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3356
3357 return ibmvnic_send_crq(adapter, &crq);
3358 }
3359
3360 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3361 {
3362 union ibmvnic_crq crq;
3363
3364 memset(&crq, 0, sizeof(crq));
3365 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3366 crq.version_exchange.cmd = VERSION_EXCHANGE;
3367 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3368
3369 return ibmvnic_send_crq(adapter, &crq);
3370 }
3371
3372 struct vnic_login_client_data {
3373 u8 type;
3374 __be16 len;
3375 char name[];
3376 } __packed;
3377
3378 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3379 {
3380 int len;
3381
3382 /* Calculate the amount of buffer space needed for the
3383 * vnic client data in the login buffer. There are four entries,
3384 * OS name, LPAR name, device name, and a null last entry.
3385 */
3386 len = 4 * sizeof(struct vnic_login_client_data);
3387 len += 6; /* "Linux" plus NULL */
3388 len += strlen(utsname()->nodename) + 1;
3389 len += strlen(adapter->netdev->name) + 1;
3390
3391 return len;
3392 }
3393
3394 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3395 struct vnic_login_client_data *vlcd)
3396 {
3397 const char *os_name = "Linux";
3398 int len;
3399
3400 /* Type 1 - LPAR OS */
3401 vlcd->type = 1;
3402 len = strlen(os_name) + 1;
3403 vlcd->len = cpu_to_be16(len);
3404 strncpy(vlcd->name, os_name, len);
3405 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3406
3407 /* Type 2 - LPAR name */
3408 vlcd->type = 2;
3409 len = strlen(utsname()->nodename) + 1;
3410 vlcd->len = cpu_to_be16(len);
3411 strncpy(vlcd->name, utsname()->nodename, len);
3412 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3413
3414 /* Type 3 - device name */
3415 vlcd->type = 3;
3416 len = strlen(adapter->netdev->name) + 1;
3417 vlcd->len = cpu_to_be16(len);
3418 strncpy(vlcd->name, adapter->netdev->name, len);
3419 }
3420
3421 static int send_login(struct ibmvnic_adapter *adapter)
3422 {
3423 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3424 struct ibmvnic_login_buffer *login_buffer;
3425 struct device *dev = &adapter->vdev->dev;
3426 dma_addr_t rsp_buffer_token;
3427 dma_addr_t buffer_token;
3428 size_t rsp_buffer_size;
3429 union ibmvnic_crq crq;
3430 size_t buffer_size;
3431 __be64 *tx_list_p;
3432 __be64 *rx_list_p;
3433 int client_data_len;
3434 struct vnic_login_client_data *vlcd;
3435 int i;
3436
3437 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3438 netdev_err(adapter->netdev,
3439 "RX or TX queues are not allocated, device login failed\n");
3440 return -1;
3441 }
3442
3443 release_login_rsp_buffer(adapter);
3444 client_data_len = vnic_client_data_len(adapter);
3445
3446 buffer_size =
3447 sizeof(struct ibmvnic_login_buffer) +
3448 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3449 client_data_len;
3450
3451 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3452 if (!login_buffer)
3453 goto buf_alloc_failed;
3454
3455 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3456 DMA_TO_DEVICE);
3457 if (dma_mapping_error(dev, buffer_token)) {
3458 dev_err(dev, "Couldn't map login buffer\n");
3459 goto buf_map_failed;
3460 }
3461
3462 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3463 sizeof(u64) * adapter->req_tx_queues +
3464 sizeof(u64) * adapter->req_rx_queues +
3465 sizeof(u64) * adapter->req_rx_queues +
3466 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3467
3468 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3469 if (!login_rsp_buffer)
3470 goto buf_rsp_alloc_failed;
3471
3472 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3473 rsp_buffer_size, DMA_FROM_DEVICE);
3474 if (dma_mapping_error(dev, rsp_buffer_token)) {
3475 dev_err(dev, "Couldn't map login rsp buffer\n");
3476 goto buf_rsp_map_failed;
3477 }
3478
3479 adapter->login_buf = login_buffer;
3480 adapter->login_buf_token = buffer_token;
3481 adapter->login_buf_sz = buffer_size;
3482 adapter->login_rsp_buf = login_rsp_buffer;
3483 adapter->login_rsp_buf_token = rsp_buffer_token;
3484 adapter->login_rsp_buf_sz = rsp_buffer_size;
3485
3486 login_buffer->len = cpu_to_be32(buffer_size);
3487 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3488 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3489 login_buffer->off_txcomp_subcrqs =
3490 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3491 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3492 login_buffer->off_rxcomp_subcrqs =
3493 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3494 sizeof(u64) * adapter->req_tx_queues);
3495 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3496 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3497
3498 tx_list_p = (__be64 *)((char *)login_buffer +
3499 sizeof(struct ibmvnic_login_buffer));
3500 rx_list_p = (__be64 *)((char *)login_buffer +
3501 sizeof(struct ibmvnic_login_buffer) +
3502 sizeof(u64) * adapter->req_tx_queues);
3503
3504 for (i = 0; i < adapter->req_tx_queues; i++) {
3505 if (adapter->tx_scrq[i]) {
3506 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3507 crq_num);
3508 }
3509 }
3510
3511 for (i = 0; i < adapter->req_rx_queues; i++) {
3512 if (adapter->rx_scrq[i]) {
3513 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3514 crq_num);
3515 }
3516 }
3517
3518 /* Insert vNIC login client data */
3519 vlcd = (struct vnic_login_client_data *)
3520 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3521 login_buffer->client_data_offset =
3522 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3523 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3524
3525 vnic_add_client_data(adapter, vlcd);
3526
3527 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3528 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3529 netdev_dbg(adapter->netdev, "%016lx\n",
3530 ((unsigned long int *)(adapter->login_buf))[i]);
3531 }
3532
3533 memset(&crq, 0, sizeof(crq));
3534 crq.login.first = IBMVNIC_CRQ_CMD;
3535 crq.login.cmd = LOGIN;
3536 crq.login.ioba = cpu_to_be32(buffer_token);
3537 crq.login.len = cpu_to_be32(buffer_size);
3538 ibmvnic_send_crq(adapter, &crq);
3539
3540 return 0;
3541
3542 buf_rsp_map_failed:
3543 kfree(login_rsp_buffer);
3544 buf_rsp_alloc_failed:
3545 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3546 buf_map_failed:
3547 kfree(login_buffer);
3548 buf_alloc_failed:
3549 return -1;
3550 }
3551
3552 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3553 u32 len, u8 map_id)
3554 {
3555 union ibmvnic_crq crq;
3556
3557 memset(&crq, 0, sizeof(crq));
3558 crq.request_map.first = IBMVNIC_CRQ_CMD;
3559 crq.request_map.cmd = REQUEST_MAP;
3560 crq.request_map.map_id = map_id;
3561 crq.request_map.ioba = cpu_to_be32(addr);
3562 crq.request_map.len = cpu_to_be32(len);
3563 return ibmvnic_send_crq(adapter, &crq);
3564 }
3565
3566 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3567 {
3568 union ibmvnic_crq crq;
3569
3570 memset(&crq, 0, sizeof(crq));
3571 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3572 crq.request_unmap.cmd = REQUEST_UNMAP;
3573 crq.request_unmap.map_id = map_id;
3574 return ibmvnic_send_crq(adapter, &crq);
3575 }
3576
3577 static void send_map_query(struct ibmvnic_adapter *adapter)
3578 {
3579 union ibmvnic_crq crq;
3580
3581 memset(&crq, 0, sizeof(crq));
3582 crq.query_map.first = IBMVNIC_CRQ_CMD;
3583 crq.query_map.cmd = QUERY_MAP;
3584 ibmvnic_send_crq(adapter, &crq);
3585 }
3586
3587 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3588 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3589 {
3590 union ibmvnic_crq crq;
3591
3592 atomic_set(&adapter->running_cap_crqs, 0);
3593 memset(&crq, 0, sizeof(crq));
3594 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3595 crq.query_capability.cmd = QUERY_CAPABILITY;
3596
3597 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3598 atomic_inc(&adapter->running_cap_crqs);
3599 ibmvnic_send_crq(adapter, &crq);
3600
3601 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3602 atomic_inc(&adapter->running_cap_crqs);
3603 ibmvnic_send_crq(adapter, &crq);
3604
3605 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3606 atomic_inc(&adapter->running_cap_crqs);
3607 ibmvnic_send_crq(adapter, &crq);
3608
3609 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3610 atomic_inc(&adapter->running_cap_crqs);
3611 ibmvnic_send_crq(adapter, &crq);
3612
3613 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3614 atomic_inc(&adapter->running_cap_crqs);
3615 ibmvnic_send_crq(adapter, &crq);
3616
3617 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3618 atomic_inc(&adapter->running_cap_crqs);
3619 ibmvnic_send_crq(adapter, &crq);
3620
3621 crq.query_capability.capability =
3622 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3623 atomic_inc(&adapter->running_cap_crqs);
3624 ibmvnic_send_crq(adapter, &crq);
3625
3626 crq.query_capability.capability =
3627 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3628 atomic_inc(&adapter->running_cap_crqs);
3629 ibmvnic_send_crq(adapter, &crq);
3630
3631 crq.query_capability.capability =
3632 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3633 atomic_inc(&adapter->running_cap_crqs);
3634 ibmvnic_send_crq(adapter, &crq);
3635
3636 crq.query_capability.capability =
3637 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3638 atomic_inc(&adapter->running_cap_crqs);
3639 ibmvnic_send_crq(adapter, &crq);
3640
3641 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3642 atomic_inc(&adapter->running_cap_crqs);
3643 ibmvnic_send_crq(adapter, &crq);
3644
3645 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3646 atomic_inc(&adapter->running_cap_crqs);
3647 ibmvnic_send_crq(adapter, &crq);
3648
3649 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3650 atomic_inc(&adapter->running_cap_crqs);
3651 ibmvnic_send_crq(adapter, &crq);
3652
3653 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3654 atomic_inc(&adapter->running_cap_crqs);
3655 ibmvnic_send_crq(adapter, &crq);
3656
3657 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3658 atomic_inc(&adapter->running_cap_crqs);
3659 ibmvnic_send_crq(adapter, &crq);
3660
3661 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3662 atomic_inc(&adapter->running_cap_crqs);
3663 ibmvnic_send_crq(adapter, &crq);
3664
3665 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3666 atomic_inc(&adapter->running_cap_crqs);
3667 ibmvnic_send_crq(adapter, &crq);
3668
3669 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3670 atomic_inc(&adapter->running_cap_crqs);
3671 ibmvnic_send_crq(adapter, &crq);
3672
3673 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3674 atomic_inc(&adapter->running_cap_crqs);
3675 ibmvnic_send_crq(adapter, &crq);
3676
3677 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3678 atomic_inc(&adapter->running_cap_crqs);
3679 ibmvnic_send_crq(adapter, &crq);
3680
3681 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3682 atomic_inc(&adapter->running_cap_crqs);
3683 ibmvnic_send_crq(adapter, &crq);
3684
3685 crq.query_capability.capability =
3686 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3687 atomic_inc(&adapter->running_cap_crqs);
3688 ibmvnic_send_crq(adapter, &crq);
3689
3690 crq.query_capability.capability =
3691 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3692 atomic_inc(&adapter->running_cap_crqs);
3693 ibmvnic_send_crq(adapter, &crq);
3694
3695 crq.query_capability.capability =
3696 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3697 atomic_inc(&adapter->running_cap_crqs);
3698 ibmvnic_send_crq(adapter, &crq);
3699
3700 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3701 atomic_inc(&adapter->running_cap_crqs);
3702 ibmvnic_send_crq(adapter, &crq);
3703 }
3704
3705 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3706 struct ibmvnic_adapter *adapter)
3707 {
3708 struct device *dev = &adapter->vdev->dev;
3709
3710 if (crq->get_vpd_size_rsp.rc.code) {
3711 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3712 crq->get_vpd_size_rsp.rc.code);
3713 complete(&adapter->fw_done);
3714 return;
3715 }
3716
3717 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3718 complete(&adapter->fw_done);
3719 }
3720
3721 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3722 struct ibmvnic_adapter *adapter)
3723 {
3724 struct device *dev = &adapter->vdev->dev;
3725 unsigned char *substr = NULL;
3726 u8 fw_level_len = 0;
3727
3728 memset(adapter->fw_version, 0, 32);
3729
3730 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3731 DMA_FROM_DEVICE);
3732
3733 if (crq->get_vpd_rsp.rc.code) {
3734 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3735 crq->get_vpd_rsp.rc.code);
3736 goto complete;
3737 }
3738
3739 /* get the position of the firmware version info
3740 * located after the ASCII 'RM' substring in the buffer
3741 */
3742 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3743 if (!substr) {
3744 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3745 goto complete;
3746 }
3747
3748 /* get length of firmware level ASCII substring */
3749 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3750 fw_level_len = *(substr + 2);
3751 } else {
3752 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3753 goto complete;
3754 }
3755
3756 /* copy firmware version string from vpd into adapter */
3757 if ((substr + 3 + fw_level_len) <
3758 (adapter->vpd->buff + adapter->vpd->len)) {
3759 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3760 } else {
3761 dev_info(dev, "FW substr extrapolated VPD buff\n");
3762 }
3763
3764 complete:
3765 if (adapter->fw_version[0] == '\0')
3766 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3767 complete(&adapter->fw_done);
3768 }
3769
3770 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3771 {
3772 struct device *dev = &adapter->vdev->dev;
3773 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3774 union ibmvnic_crq crq;
3775 int i;
3776
3777 dma_unmap_single(dev, adapter->ip_offload_tok,
3778 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3779
3780 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3781 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3782 netdev_dbg(adapter->netdev, "%016lx\n",
3783 ((unsigned long int *)(buf))[i]);
3784
3785 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3786 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3787 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3788 buf->tcp_ipv4_chksum);
3789 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3790 buf->tcp_ipv6_chksum);
3791 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3792 buf->udp_ipv4_chksum);
3793 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3794 buf->udp_ipv6_chksum);
3795 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3796 buf->large_tx_ipv4);
3797 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3798 buf->large_tx_ipv6);
3799 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3800 buf->large_rx_ipv4);
3801 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3802 buf->large_rx_ipv6);
3803 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3804 buf->max_ipv4_header_size);
3805 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3806 buf->max_ipv6_header_size);
3807 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3808 buf->max_tcp_header_size);
3809 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3810 buf->max_udp_header_size);
3811 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3812 buf->max_large_tx_size);
3813 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3814 buf->max_large_rx_size);
3815 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3816 buf->ipv6_extension_header);
3817 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3818 buf->tcp_pseudosum_req);
3819 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3820 buf->num_ipv6_ext_headers);
3821 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3822 buf->off_ipv6_ext_headers);
3823
3824 adapter->ip_offload_ctrl_tok =
3825 dma_map_single(dev, &adapter->ip_offload_ctrl,
3826 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3827
3828 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3829 dev_err(dev, "Couldn't map ip offload control buffer\n");
3830 return;
3831 }
3832
3833 adapter->ip_offload_ctrl.len =
3834 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3835 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3836 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3837 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3838 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3839 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3840 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3841 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3842 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3843 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3844
3845 /* large_rx disabled for now, additional features needed */
3846 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3847 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3848
3849 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3850
3851 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3852 adapter->netdev->features |= NETIF_F_IP_CSUM;
3853
3854 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3855 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3856
3857 if ((adapter->netdev->features &
3858 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3859 adapter->netdev->features |= NETIF_F_RXCSUM;
3860
3861 if (buf->large_tx_ipv4)
3862 adapter->netdev->features |= NETIF_F_TSO;
3863 if (buf->large_tx_ipv6)
3864 adapter->netdev->features |= NETIF_F_TSO6;
3865
3866 adapter->netdev->hw_features |= adapter->netdev->features;
3867
3868 memset(&crq, 0, sizeof(crq));
3869 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3870 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3871 crq.control_ip_offload.len =
3872 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3873 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3874 ibmvnic_send_crq(adapter, &crq);
3875 }
3876
3877 static const char *ibmvnic_fw_err_cause(u16 cause)
3878 {
3879 switch (cause) {
3880 case ADAPTER_PROBLEM:
3881 return "adapter problem";
3882 case BUS_PROBLEM:
3883 return "bus problem";
3884 case FW_PROBLEM:
3885 return "firmware problem";
3886 case DD_PROBLEM:
3887 return "device driver problem";
3888 case EEH_RECOVERY:
3889 return "EEH recovery";
3890 case FW_UPDATED:
3891 return "firmware updated";
3892 case LOW_MEMORY:
3893 return "low Memory";
3894 default:
3895 return "unknown";
3896 }
3897 }
3898
3899 static void handle_error_indication(union ibmvnic_crq *crq,
3900 struct ibmvnic_adapter *adapter)
3901 {
3902 struct device *dev = &adapter->vdev->dev;
3903 u16 cause;
3904
3905 cause = be16_to_cpu(crq->error_indication.error_cause);
3906
3907 dev_warn_ratelimited(dev,
3908 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3909 crq->error_indication.flags
3910 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3911 ibmvnic_fw_err_cause(cause));
3912
3913 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3914 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3915 else
3916 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3917 }
3918
3919 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3920 struct ibmvnic_adapter *adapter)
3921 {
3922 struct net_device *netdev = adapter->netdev;
3923 struct device *dev = &adapter->vdev->dev;
3924 long rc;
3925
3926 rc = crq->change_mac_addr_rsp.rc.code;
3927 if (rc) {
3928 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3929 goto out;
3930 }
3931 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3932 ETH_ALEN);
3933 out:
3934 complete(&adapter->fw_done);
3935 return rc;
3936 }
3937
3938 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3939 struct ibmvnic_adapter *adapter)
3940 {
3941 struct device *dev = &adapter->vdev->dev;
3942 u64 *req_value;
3943 char *name;
3944
3945 atomic_dec(&adapter->running_cap_crqs);
3946 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3947 case REQ_TX_QUEUES:
3948 req_value = &adapter->req_tx_queues;
3949 name = "tx";
3950 break;
3951 case REQ_RX_QUEUES:
3952 req_value = &adapter->req_rx_queues;
3953 name = "rx";
3954 break;
3955 case REQ_RX_ADD_QUEUES:
3956 req_value = &adapter->req_rx_add_queues;
3957 name = "rx_add";
3958 break;
3959 case REQ_TX_ENTRIES_PER_SUBCRQ:
3960 req_value = &adapter->req_tx_entries_per_subcrq;
3961 name = "tx_entries_per_subcrq";
3962 break;
3963 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3964 req_value = &adapter->req_rx_add_entries_per_subcrq;
3965 name = "rx_add_entries_per_subcrq";
3966 break;
3967 case REQ_MTU:
3968 req_value = &adapter->req_mtu;
3969 name = "mtu";
3970 break;
3971 case PROMISC_REQUESTED:
3972 req_value = &adapter->promisc;
3973 name = "promisc";
3974 break;
3975 default:
3976 dev_err(dev, "Got invalid cap request rsp %d\n",
3977 crq->request_capability.capability);
3978 return;
3979 }
3980
3981 switch (crq->request_capability_rsp.rc.code) {
3982 case SUCCESS:
3983 break;
3984 case PARTIALSUCCESS:
3985 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3986 *req_value,
3987 (long int)be64_to_cpu(crq->request_capability_rsp.
3988 number), name);
3989
3990 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3991 REQ_MTU) {
3992 pr_err("mtu of %llu is not supported. Reverting.\n",
3993 *req_value);
3994 *req_value = adapter->fallback.mtu;
3995 } else {
3996 *req_value =
3997 be64_to_cpu(crq->request_capability_rsp.number);
3998 }
3999
4000 ibmvnic_send_req_caps(adapter, 1);
4001 return;
4002 default:
4003 dev_err(dev, "Error %d in request cap rsp\n",
4004 crq->request_capability_rsp.rc.code);
4005 return;
4006 }
4007
4008 /* Done receiving requested capabilities, query IP offload support */
4009 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4010 union ibmvnic_crq newcrq;
4011 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4012 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4013 &adapter->ip_offload_buf;
4014
4015 adapter->wait_capability = false;
4016 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4017 buf_sz,
4018 DMA_FROM_DEVICE);
4019
4020 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4021 if (!firmware_has_feature(FW_FEATURE_CMO))
4022 dev_err(dev, "Couldn't map offload buffer\n");
4023 return;
4024 }
4025
4026 memset(&newcrq, 0, sizeof(newcrq));
4027 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4028 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4029 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4030 newcrq.query_ip_offload.ioba =
4031 cpu_to_be32(adapter->ip_offload_tok);
4032
4033 ibmvnic_send_crq(adapter, &newcrq);
4034 }
4035 }
4036
4037 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4038 struct ibmvnic_adapter *adapter)
4039 {
4040 struct device *dev = &adapter->vdev->dev;
4041 struct net_device *netdev = adapter->netdev;
4042 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4043 struct ibmvnic_login_buffer *login = adapter->login_buf;
4044 int i;
4045
4046 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4047 DMA_TO_DEVICE);
4048 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4049 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4050
4051 /* If the number of queues requested can't be allocated by the
4052 * server, the login response will return with code 1. We will need
4053 * to resend the login buffer with fewer queues requested.
4054 */
4055 if (login_rsp_crq->generic.rc.code) {
4056 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4057 complete(&adapter->init_done);
4058 return 0;
4059 }
4060
4061 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4062
4063 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4064 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4065 netdev_dbg(adapter->netdev, "%016lx\n",
4066 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4067 }
4068
4069 /* Sanity checks */
4070 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4071 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4072 adapter->req_rx_add_queues !=
4073 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4074 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4075 ibmvnic_remove(adapter->vdev);
4076 return -EIO;
4077 }
4078 release_login_buffer(adapter);
4079 complete(&adapter->init_done);
4080
4081 return 0;
4082 }
4083
4084 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4085 struct ibmvnic_adapter *adapter)
4086 {
4087 struct device *dev = &adapter->vdev->dev;
4088 long rc;
4089
4090 rc = crq->request_unmap_rsp.rc.code;
4091 if (rc)
4092 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4093 }
4094
4095 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4096 struct ibmvnic_adapter *adapter)
4097 {
4098 struct net_device *netdev = adapter->netdev;
4099 struct device *dev = &adapter->vdev->dev;
4100 long rc;
4101
4102 rc = crq->query_map_rsp.rc.code;
4103 if (rc) {
4104 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4105 return;
4106 }
4107 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4108 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4109 crq->query_map_rsp.free_pages);
4110 }
4111
4112 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4113 struct ibmvnic_adapter *adapter)
4114 {
4115 struct net_device *netdev = adapter->netdev;
4116 struct device *dev = &adapter->vdev->dev;
4117 long rc;
4118
4119 atomic_dec(&adapter->running_cap_crqs);
4120 netdev_dbg(netdev, "Outstanding queries: %d\n",
4121 atomic_read(&adapter->running_cap_crqs));
4122 rc = crq->query_capability.rc.code;
4123 if (rc) {
4124 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4125 goto out;
4126 }
4127
4128 switch (be16_to_cpu(crq->query_capability.capability)) {
4129 case MIN_TX_QUEUES:
4130 adapter->min_tx_queues =
4131 be64_to_cpu(crq->query_capability.number);
4132 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4133 adapter->min_tx_queues);
4134 break;
4135 case MIN_RX_QUEUES:
4136 adapter->min_rx_queues =
4137 be64_to_cpu(crq->query_capability.number);
4138 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4139 adapter->min_rx_queues);
4140 break;
4141 case MIN_RX_ADD_QUEUES:
4142 adapter->min_rx_add_queues =
4143 be64_to_cpu(crq->query_capability.number);
4144 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4145 adapter->min_rx_add_queues);
4146 break;
4147 case MAX_TX_QUEUES:
4148 adapter->max_tx_queues =
4149 be64_to_cpu(crq->query_capability.number);
4150 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4151 adapter->max_tx_queues);
4152 break;
4153 case MAX_RX_QUEUES:
4154 adapter->max_rx_queues =
4155 be64_to_cpu(crq->query_capability.number);
4156 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4157 adapter->max_rx_queues);
4158 break;
4159 case MAX_RX_ADD_QUEUES:
4160 adapter->max_rx_add_queues =
4161 be64_to_cpu(crq->query_capability.number);
4162 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4163 adapter->max_rx_add_queues);
4164 break;
4165 case MIN_TX_ENTRIES_PER_SUBCRQ:
4166 adapter->min_tx_entries_per_subcrq =
4167 be64_to_cpu(crq->query_capability.number);
4168 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4169 adapter->min_tx_entries_per_subcrq);
4170 break;
4171 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4172 adapter->min_rx_add_entries_per_subcrq =
4173 be64_to_cpu(crq->query_capability.number);
4174 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4175 adapter->min_rx_add_entries_per_subcrq);
4176 break;
4177 case MAX_TX_ENTRIES_PER_SUBCRQ:
4178 adapter->max_tx_entries_per_subcrq =
4179 be64_to_cpu(crq->query_capability.number);
4180 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4181 adapter->max_tx_entries_per_subcrq);
4182 break;
4183 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4184 adapter->max_rx_add_entries_per_subcrq =
4185 be64_to_cpu(crq->query_capability.number);
4186 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4187 adapter->max_rx_add_entries_per_subcrq);
4188 break;
4189 case TCP_IP_OFFLOAD:
4190 adapter->tcp_ip_offload =
4191 be64_to_cpu(crq->query_capability.number);
4192 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4193 adapter->tcp_ip_offload);
4194 break;
4195 case PROMISC_SUPPORTED:
4196 adapter->promisc_supported =
4197 be64_to_cpu(crq->query_capability.number);
4198 netdev_dbg(netdev, "promisc_supported = %lld\n",
4199 adapter->promisc_supported);
4200 break;
4201 case MIN_MTU:
4202 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4203 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4204 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4205 break;
4206 case MAX_MTU:
4207 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4208 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4209 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4210 break;
4211 case MAX_MULTICAST_FILTERS:
4212 adapter->max_multicast_filters =
4213 be64_to_cpu(crq->query_capability.number);
4214 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4215 adapter->max_multicast_filters);
4216 break;
4217 case VLAN_HEADER_INSERTION:
4218 adapter->vlan_header_insertion =
4219 be64_to_cpu(crq->query_capability.number);
4220 if (adapter->vlan_header_insertion)
4221 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4222 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4223 adapter->vlan_header_insertion);
4224 break;
4225 case RX_VLAN_HEADER_INSERTION:
4226 adapter->rx_vlan_header_insertion =
4227 be64_to_cpu(crq->query_capability.number);
4228 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4229 adapter->rx_vlan_header_insertion);
4230 break;
4231 case MAX_TX_SG_ENTRIES:
4232 adapter->max_tx_sg_entries =
4233 be64_to_cpu(crq->query_capability.number);
4234 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4235 adapter->max_tx_sg_entries);
4236 break;
4237 case RX_SG_SUPPORTED:
4238 adapter->rx_sg_supported =
4239 be64_to_cpu(crq->query_capability.number);
4240 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4241 adapter->rx_sg_supported);
4242 break;
4243 case OPT_TX_COMP_SUB_QUEUES:
4244 adapter->opt_tx_comp_sub_queues =
4245 be64_to_cpu(crq->query_capability.number);
4246 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4247 adapter->opt_tx_comp_sub_queues);
4248 break;
4249 case OPT_RX_COMP_QUEUES:
4250 adapter->opt_rx_comp_queues =
4251 be64_to_cpu(crq->query_capability.number);
4252 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4253 adapter->opt_rx_comp_queues);
4254 break;
4255 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4256 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4257 be64_to_cpu(crq->query_capability.number);
4258 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4259 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4260 break;
4261 case OPT_TX_ENTRIES_PER_SUBCRQ:
4262 adapter->opt_tx_entries_per_subcrq =
4263 be64_to_cpu(crq->query_capability.number);
4264 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4265 adapter->opt_tx_entries_per_subcrq);
4266 break;
4267 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4268 adapter->opt_rxba_entries_per_subcrq =
4269 be64_to_cpu(crq->query_capability.number);
4270 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4271 adapter->opt_rxba_entries_per_subcrq);
4272 break;
4273 case TX_RX_DESC_REQ:
4274 adapter->tx_rx_desc_req = crq->query_capability.number;
4275 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4276 adapter->tx_rx_desc_req);
4277 break;
4278
4279 default:
4280 netdev_err(netdev, "Got invalid cap rsp %d\n",
4281 crq->query_capability.capability);
4282 }
4283
4284 out:
4285 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4286 adapter->wait_capability = false;
4287 ibmvnic_send_req_caps(adapter, 0);
4288 }
4289 }
4290
4291 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4292 struct ibmvnic_adapter *adapter)
4293 {
4294 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4295 struct net_device *netdev = adapter->netdev;
4296 struct device *dev = &adapter->vdev->dev;
4297 u64 *u64_crq = (u64 *)crq;
4298 long rc;
4299
4300 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4301 (unsigned long int)cpu_to_be64(u64_crq[0]),
4302 (unsigned long int)cpu_to_be64(u64_crq[1]));
4303 switch (gen_crq->first) {
4304 case IBMVNIC_CRQ_INIT_RSP:
4305 switch (gen_crq->cmd) {
4306 case IBMVNIC_CRQ_INIT:
4307 dev_info(dev, "Partner initialized\n");
4308 adapter->from_passive_init = true;
4309 adapter->failover_pending = false;
4310 if (!completion_done(&adapter->init_done)) {
4311 complete(&adapter->init_done);
4312 adapter->init_done_rc = -EIO;
4313 }
4314 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4315 break;
4316 case IBMVNIC_CRQ_INIT_COMPLETE:
4317 dev_info(dev, "Partner initialization complete\n");
4318 adapter->crq.active = true;
4319 send_version_xchg(adapter);
4320 break;
4321 default:
4322 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4323 }
4324 return;
4325 case IBMVNIC_CRQ_XPORT_EVENT:
4326 netif_carrier_off(netdev);
4327 adapter->crq.active = false;
4328 if (adapter->resetting)
4329 adapter->force_reset_recovery = true;
4330 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4331 dev_info(dev, "Migrated, re-enabling adapter\n");
4332 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4333 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4334 dev_info(dev, "Backing device failover detected\n");
4335 adapter->failover_pending = true;
4336 } else {
4337 /* The adapter lost the connection */
4338 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4339 gen_crq->cmd);
4340 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4341 }
4342 return;
4343 case IBMVNIC_CRQ_CMD_RSP:
4344 break;
4345 default:
4346 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4347 gen_crq->first);
4348 return;
4349 }
4350
4351 switch (gen_crq->cmd) {
4352 case VERSION_EXCHANGE_RSP:
4353 rc = crq->version_exchange_rsp.rc.code;
4354 if (rc) {
4355 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4356 break;
4357 }
4358 dev_info(dev, "Partner protocol version is %d\n",
4359 crq->version_exchange_rsp.version);
4360 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4361 ibmvnic_version)
4362 ibmvnic_version =
4363 be16_to_cpu(crq->version_exchange_rsp.version);
4364 send_cap_queries(adapter);
4365 break;
4366 case QUERY_CAPABILITY_RSP:
4367 handle_query_cap_rsp(crq, adapter);
4368 break;
4369 case QUERY_MAP_RSP:
4370 handle_query_map_rsp(crq, adapter);
4371 break;
4372 case REQUEST_MAP_RSP:
4373 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4374 complete(&adapter->fw_done);
4375 break;
4376 case REQUEST_UNMAP_RSP:
4377 handle_request_unmap_rsp(crq, adapter);
4378 break;
4379 case REQUEST_CAPABILITY_RSP:
4380 handle_request_cap_rsp(crq, adapter);
4381 break;
4382 case LOGIN_RSP:
4383 netdev_dbg(netdev, "Got Login Response\n");
4384 handle_login_rsp(crq, adapter);
4385 break;
4386 case LOGICAL_LINK_STATE_RSP:
4387 netdev_dbg(netdev,
4388 "Got Logical Link State Response, state: %d rc: %d\n",
4389 crq->logical_link_state_rsp.link_state,
4390 crq->logical_link_state_rsp.rc.code);
4391 adapter->logical_link_state =
4392 crq->logical_link_state_rsp.link_state;
4393 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4394 complete(&adapter->init_done);
4395 break;
4396 case LINK_STATE_INDICATION:
4397 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4398 adapter->phys_link_state =
4399 crq->link_state_indication.phys_link_state;
4400 adapter->logical_link_state =
4401 crq->link_state_indication.logical_link_state;
4402 break;
4403 case CHANGE_MAC_ADDR_RSP:
4404 netdev_dbg(netdev, "Got MAC address change Response\n");
4405 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4406 break;
4407 case ERROR_INDICATION:
4408 netdev_dbg(netdev, "Got Error Indication\n");
4409 handle_error_indication(crq, adapter);
4410 break;
4411 case REQUEST_STATISTICS_RSP:
4412 netdev_dbg(netdev, "Got Statistics Response\n");
4413 complete(&adapter->stats_done);
4414 break;
4415 case QUERY_IP_OFFLOAD_RSP:
4416 netdev_dbg(netdev, "Got Query IP offload Response\n");
4417 handle_query_ip_offload_rsp(adapter);
4418 break;
4419 case MULTICAST_CTRL_RSP:
4420 netdev_dbg(netdev, "Got multicast control Response\n");
4421 break;
4422 case CONTROL_IP_OFFLOAD_RSP:
4423 netdev_dbg(netdev, "Got Control IP offload Response\n");
4424 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4425 sizeof(adapter->ip_offload_ctrl),
4426 DMA_TO_DEVICE);
4427 complete(&adapter->init_done);
4428 break;
4429 case COLLECT_FW_TRACE_RSP:
4430 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4431 complete(&adapter->fw_done);
4432 break;
4433 case GET_VPD_SIZE_RSP:
4434 handle_vpd_size_rsp(crq, adapter);
4435 break;
4436 case GET_VPD_RSP:
4437 handle_vpd_rsp(crq, adapter);
4438 break;
4439 default:
4440 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4441 gen_crq->cmd);
4442 }
4443 }
4444
4445 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4446 {
4447 struct ibmvnic_adapter *adapter = instance;
4448
4449 tasklet_schedule(&adapter->tasklet);
4450 return IRQ_HANDLED;
4451 }
4452
4453 static void ibmvnic_tasklet(void *data)
4454 {
4455 struct ibmvnic_adapter *adapter = data;
4456 struct ibmvnic_crq_queue *queue = &adapter->crq;
4457 union ibmvnic_crq *crq;
4458 unsigned long flags;
4459 bool done = false;
4460
4461 spin_lock_irqsave(&queue->lock, flags);
4462 while (!done) {
4463 /* Pull all the valid messages off the CRQ */
4464 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4465 ibmvnic_handle_crq(crq, adapter);
4466 crq->generic.first = 0;
4467 }
4468
4469 /* remain in tasklet until all
4470 * capabilities responses are received
4471 */
4472 if (!adapter->wait_capability)
4473 done = true;
4474 }
4475 /* if capabilities CRQ's were sent in this tasklet, the following
4476 * tasklet must wait until all responses are received
4477 */
4478 if (atomic_read(&adapter->running_cap_crqs) != 0)
4479 adapter->wait_capability = true;
4480 spin_unlock_irqrestore(&queue->lock, flags);
4481 }
4482
4483 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4484 {
4485 struct vio_dev *vdev = adapter->vdev;
4486 int rc;
4487
4488 do {
4489 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4490 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4491
4492 if (rc)
4493 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4494
4495 return rc;
4496 }
4497
4498 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4499 {
4500 struct ibmvnic_crq_queue *crq = &adapter->crq;
4501 struct device *dev = &adapter->vdev->dev;
4502 struct vio_dev *vdev = adapter->vdev;
4503 int rc;
4504
4505 /* Close the CRQ */
4506 do {
4507 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4508 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4509
4510 /* Clean out the queue */
4511 memset(crq->msgs, 0, PAGE_SIZE);
4512 crq->cur = 0;
4513 crq->active = false;
4514
4515 /* And re-open it again */
4516 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4517 crq->msg_token, PAGE_SIZE);
4518
4519 if (rc == H_CLOSED)
4520 /* Adapter is good, but other end is not ready */
4521 dev_warn(dev, "Partner adapter not ready\n");
4522 else if (rc != 0)
4523 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4524
4525 return rc;
4526 }
4527
4528 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4529 {
4530 struct ibmvnic_crq_queue *crq = &adapter->crq;
4531 struct vio_dev *vdev = adapter->vdev;
4532 long rc;
4533
4534 if (!crq->msgs)
4535 return;
4536
4537 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4538 free_irq(vdev->irq, adapter);
4539 tasklet_kill(&adapter->tasklet);
4540 do {
4541 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4542 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4543
4544 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4545 DMA_BIDIRECTIONAL);
4546 free_page((unsigned long)crq->msgs);
4547 crq->msgs = NULL;
4548 crq->active = false;
4549 }
4550
4551 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4552 {
4553 struct ibmvnic_crq_queue *crq = &adapter->crq;
4554 struct device *dev = &adapter->vdev->dev;
4555 struct vio_dev *vdev = adapter->vdev;
4556 int rc, retrc = -ENOMEM;
4557
4558 if (crq->msgs)
4559 return 0;
4560
4561 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4562 /* Should we allocate more than one page? */
4563
4564 if (!crq->msgs)
4565 return -ENOMEM;
4566
4567 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4568 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4569 DMA_BIDIRECTIONAL);
4570 if (dma_mapping_error(dev, crq->msg_token))
4571 goto map_failed;
4572
4573 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4574 crq->msg_token, PAGE_SIZE);
4575
4576 if (rc == H_RESOURCE)
4577 /* maybe kexecing and resource is busy. try a reset */
4578 rc = ibmvnic_reset_crq(adapter);
4579 retrc = rc;
4580
4581 if (rc == H_CLOSED) {
4582 dev_warn(dev, "Partner adapter not ready\n");
4583 } else if (rc) {
4584 dev_warn(dev, "Error %d opening adapter\n", rc);
4585 goto reg_crq_failed;
4586 }
4587
4588 retrc = 0;
4589
4590 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4591 (unsigned long)adapter);
4592
4593 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4594 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4595 adapter);
4596 if (rc) {
4597 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4598 vdev->irq, rc);
4599 goto req_irq_failed;
4600 }
4601
4602 rc = vio_enable_interrupts(vdev);
4603 if (rc) {
4604 dev_err(dev, "Error %d enabling interrupts\n", rc);
4605 goto req_irq_failed;
4606 }
4607
4608 crq->cur = 0;
4609 spin_lock_init(&crq->lock);
4610
4611 return retrc;
4612
4613 req_irq_failed:
4614 tasklet_kill(&adapter->tasklet);
4615 do {
4616 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4617 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4618 reg_crq_failed:
4619 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4620 map_failed:
4621 free_page((unsigned long)crq->msgs);
4622 crq->msgs = NULL;
4623 return retrc;
4624 }
4625
4626 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4627 {
4628 struct device *dev = &adapter->vdev->dev;
4629 unsigned long timeout = msecs_to_jiffies(30000);
4630 u64 old_num_rx_queues, old_num_tx_queues;
4631 int rc;
4632
4633 adapter->from_passive_init = false;
4634
4635 old_num_rx_queues = adapter->req_rx_queues;
4636 old_num_tx_queues = adapter->req_tx_queues;
4637
4638 init_completion(&adapter->init_done);
4639 adapter->init_done_rc = 0;
4640 ibmvnic_send_crq_init(adapter);
4641 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4642 dev_err(dev, "Initialization sequence timed out\n");
4643 return -1;
4644 }
4645
4646 if (adapter->init_done_rc) {
4647 release_crq_queue(adapter);
4648 return adapter->init_done_rc;
4649 }
4650
4651 if (adapter->from_passive_init) {
4652 adapter->state = VNIC_OPEN;
4653 adapter->from_passive_init = false;
4654 return -1;
4655 }
4656
4657 if (adapter->resetting && !adapter->wait_for_reset &&
4658 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4659 if (adapter->req_rx_queues != old_num_rx_queues ||
4660 adapter->req_tx_queues != old_num_tx_queues) {
4661 release_sub_crqs(adapter, 0);
4662 rc = init_sub_crqs(adapter);
4663 } else {
4664 rc = reset_sub_crq_queues(adapter);
4665 }
4666 } else {
4667 rc = init_sub_crqs(adapter);
4668 }
4669
4670 if (rc) {
4671 dev_err(dev, "Initialization of sub crqs failed\n");
4672 release_crq_queue(adapter);
4673 return rc;
4674 }
4675
4676 rc = init_sub_crq_irqs(adapter);
4677 if (rc) {
4678 dev_err(dev, "Failed to initialize sub crq irqs\n");
4679 release_crq_queue(adapter);
4680 }
4681
4682 return rc;
4683 }
4684
4685 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4686 {
4687 struct device *dev = &adapter->vdev->dev;
4688 unsigned long timeout = msecs_to_jiffies(30000);
4689 int rc;
4690
4691 adapter->from_passive_init = false;
4692
4693 init_completion(&adapter->init_done);
4694 adapter->init_done_rc = 0;
4695 ibmvnic_send_crq_init(adapter);
4696 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4697 dev_err(dev, "Initialization sequence timed out\n");
4698 return -1;
4699 }
4700
4701 if (adapter->init_done_rc) {
4702 release_crq_queue(adapter);
4703 return adapter->init_done_rc;
4704 }
4705
4706 if (adapter->from_passive_init) {
4707 adapter->state = VNIC_OPEN;
4708 adapter->from_passive_init = false;
4709 return -1;
4710 }
4711
4712 rc = init_sub_crqs(adapter);
4713 if (rc) {
4714 dev_err(dev, "Initialization of sub crqs failed\n");
4715 release_crq_queue(adapter);
4716 return rc;
4717 }
4718
4719 rc = init_sub_crq_irqs(adapter);
4720 if (rc) {
4721 dev_err(dev, "Failed to initialize sub crq irqs\n");
4722 release_crq_queue(adapter);
4723 }
4724
4725 return rc;
4726 }
4727
4728 static struct device_attribute dev_attr_failover;
4729
4730 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4731 {
4732 struct ibmvnic_adapter *adapter;
4733 struct net_device *netdev;
4734 unsigned char *mac_addr_p;
4735 int rc;
4736
4737 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4738 dev->unit_address);
4739
4740 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4741 VETH_MAC_ADDR, NULL);
4742 if (!mac_addr_p) {
4743 dev_err(&dev->dev,
4744 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4745 __FILE__, __LINE__);
4746 return 0;
4747 }
4748
4749 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4750 IBMVNIC_MAX_QUEUES);
4751 if (!netdev)
4752 return -ENOMEM;
4753
4754 adapter = netdev_priv(netdev);
4755 adapter->state = VNIC_PROBING;
4756 dev_set_drvdata(&dev->dev, netdev);
4757 adapter->vdev = dev;
4758 adapter->netdev = netdev;
4759
4760 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4761 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4762 netdev->irq = dev->irq;
4763 netdev->netdev_ops = &ibmvnic_netdev_ops;
4764 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4765 SET_NETDEV_DEV(netdev, &dev->dev);
4766
4767 spin_lock_init(&adapter->stats_lock);
4768
4769 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4770 INIT_LIST_HEAD(&adapter->rwi_list);
4771 mutex_init(&adapter->reset_lock);
4772 mutex_init(&adapter->rwi_lock);
4773 adapter->resetting = false;
4774
4775 adapter->mac_change_pending = false;
4776
4777 do {
4778 rc = init_crq_queue(adapter);
4779 if (rc) {
4780 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4781 rc);
4782 goto ibmvnic_init_fail;
4783 }
4784
4785 rc = ibmvnic_init(adapter);
4786 if (rc && rc != EAGAIN)
4787 goto ibmvnic_init_fail;
4788 } while (rc == EAGAIN);
4789
4790 rc = init_stats_buffers(adapter);
4791 if (rc)
4792 goto ibmvnic_init_fail;
4793
4794 rc = init_stats_token(adapter);
4795 if (rc)
4796 goto ibmvnic_stats_fail;
4797
4798 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4799 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4800 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4801
4802 rc = device_create_file(&dev->dev, &dev_attr_failover);
4803 if (rc)
4804 goto ibmvnic_dev_file_err;
4805
4806 netif_carrier_off(netdev);
4807 rc = register_netdev(netdev);
4808 if (rc) {
4809 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4810 goto ibmvnic_register_fail;
4811 }
4812 dev_info(&dev->dev, "ibmvnic registered\n");
4813
4814 adapter->state = VNIC_PROBED;
4815
4816 adapter->wait_for_reset = false;
4817
4818 return 0;
4819
4820 ibmvnic_register_fail:
4821 device_remove_file(&dev->dev, &dev_attr_failover);
4822
4823 ibmvnic_dev_file_err:
4824 release_stats_token(adapter);
4825
4826 ibmvnic_stats_fail:
4827 release_stats_buffers(adapter);
4828
4829 ibmvnic_init_fail:
4830 release_sub_crqs(adapter, 1);
4831 release_crq_queue(adapter);
4832 free_netdev(netdev);
4833
4834 return rc;
4835 }
4836
4837 static int ibmvnic_remove(struct vio_dev *dev)
4838 {
4839 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4840 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4841
4842 adapter->state = VNIC_REMOVING;
4843 unregister_netdev(netdev);
4844 mutex_lock(&adapter->reset_lock);
4845
4846 release_resources(adapter);
4847 release_sub_crqs(adapter, 1);
4848 release_crq_queue(adapter);
4849
4850 release_stats_token(adapter);
4851 release_stats_buffers(adapter);
4852
4853 adapter->state = VNIC_REMOVED;
4854
4855 mutex_unlock(&adapter->reset_lock);
4856 device_remove_file(&dev->dev, &dev_attr_failover);
4857 free_netdev(netdev);
4858 dev_set_drvdata(&dev->dev, NULL);
4859
4860 return 0;
4861 }
4862
4863 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4864 const char *buf, size_t count)
4865 {
4866 struct net_device *netdev = dev_get_drvdata(dev);
4867 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4868 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4869 __be64 session_token;
4870 long rc;
4871
4872 if (!sysfs_streq(buf, "1"))
4873 return -EINVAL;
4874
4875 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4876 H_GET_SESSION_TOKEN, 0, 0, 0);
4877 if (rc) {
4878 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4879 rc);
4880 return -EINVAL;
4881 }
4882
4883 session_token = (__be64)retbuf[0];
4884 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4885 be64_to_cpu(session_token));
4886 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4887 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4888 if (rc) {
4889 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4890 rc);
4891 return -EINVAL;
4892 }
4893
4894 return count;
4895 }
4896
4897 static DEVICE_ATTR_WO(failover);
4898
4899 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4900 {
4901 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4902 struct ibmvnic_adapter *adapter;
4903 struct iommu_table *tbl;
4904 unsigned long ret = 0;
4905 int i;
4906
4907 tbl = get_iommu_table_base(&vdev->dev);
4908
4909 /* netdev inits at probe time along with the structures we need below*/
4910 if (!netdev)
4911 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4912
4913 adapter = netdev_priv(netdev);
4914
4915 ret += PAGE_SIZE; /* the crq message queue */
4916 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4917
4918 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4919 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4920
4921 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4922 i++)
4923 ret += adapter->rx_pool[i].size *
4924 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4925
4926 return ret;
4927 }
4928
4929 static int ibmvnic_resume(struct device *dev)
4930 {
4931 struct net_device *netdev = dev_get_drvdata(dev);
4932 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4933
4934 if (adapter->state != VNIC_OPEN)
4935 return 0;
4936
4937 tasklet_schedule(&adapter->tasklet);
4938
4939 return 0;
4940 }
4941
4942 static const struct vio_device_id ibmvnic_device_table[] = {
4943 {"network", "IBM,vnic"},
4944 {"", "" }
4945 };
4946 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4947
4948 static const struct dev_pm_ops ibmvnic_pm_ops = {
4949 .resume = ibmvnic_resume
4950 };
4951
4952 static struct vio_driver ibmvnic_driver = {
4953 .id_table = ibmvnic_device_table,
4954 .probe = ibmvnic_probe,
4955 .remove = ibmvnic_remove,
4956 .get_desired_dma = ibmvnic_get_desired_dma,
4957 .name = ibmvnic_driver_name,
4958 .pm = &ibmvnic_pm_ops,
4959 };
4960
4961 /* module functions */
4962 static int __init ibmvnic_module_init(void)
4963 {
4964 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4965 IBMVNIC_DRIVER_VERSION);
4966
4967 return vio_register_driver(&ibmvnic_driver);
4968 }
4969
4970 static void __exit ibmvnic_module_exit(void)
4971 {
4972 vio_unregister_driver(&ibmvnic_driver);
4973 }
4974
4975 module_init(ibmvnic_module_init);
4976 module_exit(ibmvnic_module_exit);
Linux with added FPC-III support