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1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
72 #include <asm/vio.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
78
79 #include "ibmvnic.h"
80
81 static const char ibmvnic_driver_name[] = "ibmvnic";
82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90 static int ibmvnic_remove(struct vio_dev *);
91 static void release_sub_crqs(struct ibmvnic_adapter *);
92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100 static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102 static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static int ibmvnic_poll(struct napi_struct *napi, int data);
109 static void send_map_query(struct ibmvnic_adapter *adapter);
110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
112 static void send_login(struct ibmvnic_adapter *adapter);
113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
115 static int ibmvnic_init(struct ibmvnic_adapter *);
116 static void release_crq_queue(struct ibmvnic_adapter *);
117
118 struct ibmvnic_stat {
119 char name[ETH_GSTRING_LEN];
120 int offset;
121 };
122
123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
124 offsetof(struct ibmvnic_statistics, stat))
125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
126
127 static const struct ibmvnic_stat ibmvnic_stats[] = {
128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
150 };
151
152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
153 unsigned long length, unsigned long *number,
154 unsigned long *irq)
155 {
156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
157 long rc;
158
159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
160 *number = retbuf[0];
161 *irq = retbuf[1];
162
163 return rc;
164 }
165
166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb, int size)
168 {
169 struct device *dev = &adapter->vdev->dev;
170
171 ltb->size = size;
172 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
173 GFP_KERNEL);
174
175 if (!ltb->buff) {
176 dev_err(dev, "Couldn't alloc long term buffer\n");
177 return -ENOMEM;
178 }
179 ltb->map_id = adapter->map_id;
180 adapter->map_id++;
181
182 init_completion(&adapter->fw_done);
183 send_request_map(adapter, ltb->addr,
184 ltb->size, ltb->map_id);
185 wait_for_completion(&adapter->fw_done);
186 return 0;
187 }
188
189 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
190 struct ibmvnic_long_term_buff *ltb)
191 {
192 struct device *dev = &adapter->vdev->dev;
193
194 if (!ltb->buff)
195 return;
196
197 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
198 adapter->reset_reason != VNIC_RESET_MOBILITY)
199 send_request_unmap(adapter, ltb->map_id);
200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
201 }
202
203 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
204 struct ibmvnic_rx_pool *pool)
205 {
206 int count = pool->size - atomic_read(&pool->available);
207 struct device *dev = &adapter->vdev->dev;
208 int buffers_added = 0;
209 unsigned long lpar_rc;
210 union sub_crq sub_crq;
211 struct sk_buff *skb;
212 unsigned int offset;
213 dma_addr_t dma_addr;
214 unsigned char *dst;
215 u64 *handle_array;
216 int shift = 0;
217 int index;
218 int i;
219
220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
221 be32_to_cpu(adapter->login_rsp_buf->
222 off_rxadd_subcrqs));
223
224 for (i = 0; i < count; ++i) {
225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
226 if (!skb) {
227 dev_err(dev, "Couldn't replenish rx buff\n");
228 adapter->replenish_no_mem++;
229 break;
230 }
231
232 index = pool->free_map[pool->next_free];
233
234 if (pool->rx_buff[index].skb)
235 dev_err(dev, "Inconsistent free_map!\n");
236
237 /* Copy the skb to the long term mapped DMA buffer */
238 offset = index * pool->buff_size;
239 dst = pool->long_term_buff.buff + offset;
240 memset(dst, 0, pool->buff_size);
241 dma_addr = pool->long_term_buff.addr + offset;
242 pool->rx_buff[index].data = dst;
243
244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
245 pool->rx_buff[index].dma = dma_addr;
246 pool->rx_buff[index].skb = skb;
247 pool->rx_buff[index].pool_index = pool->index;
248 pool->rx_buff[index].size = pool->buff_size;
249
250 memset(&sub_crq, 0, sizeof(sub_crq));
251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
252 sub_crq.rx_add.correlator =
253 cpu_to_be64((u64)&pool->rx_buff[index]);
254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
256
257 /* The length field of the sCRQ is defined to be 24 bits so the
258 * buffer size needs to be left shifted by a byte before it is
259 * converted to big endian to prevent the last byte from being
260 * truncated.
261 */
262 #ifdef __LITTLE_ENDIAN__
263 shift = 8;
264 #endif
265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
266
267 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
268 &sub_crq);
269 if (lpar_rc != H_SUCCESS)
270 goto failure;
271
272 buffers_added++;
273 adapter->replenish_add_buff_success++;
274 pool->next_free = (pool->next_free + 1) % pool->size;
275 }
276 atomic_add(buffers_added, &pool->available);
277 return;
278
279 failure:
280 dev_info(dev, "replenish pools failure\n");
281 pool->free_map[pool->next_free] = index;
282 pool->rx_buff[index].skb = NULL;
283 if (!dma_mapping_error(dev, dma_addr))
284 dma_unmap_single(dev, dma_addr, pool->buff_size,
285 DMA_FROM_DEVICE);
286
287 dev_kfree_skb_any(skb);
288 adapter->replenish_add_buff_failure++;
289 atomic_add(buffers_added, &pool->available);
290 }
291
292 static void replenish_pools(struct ibmvnic_adapter *adapter)
293 {
294 int i;
295
296 adapter->replenish_task_cycles++;
297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
298 i++) {
299 if (adapter->rx_pool[i].active)
300 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
301 }
302 }
303
304 static void release_stats_token(struct ibmvnic_adapter *adapter)
305 {
306 struct device *dev = &adapter->vdev->dev;
307
308 if (!adapter->stats_token)
309 return;
310
311 dma_unmap_single(dev, adapter->stats_token,
312 sizeof(struct ibmvnic_statistics),
313 DMA_FROM_DEVICE);
314 adapter->stats_token = 0;
315 }
316
317 static int init_stats_token(struct ibmvnic_adapter *adapter)
318 {
319 struct device *dev = &adapter->vdev->dev;
320 dma_addr_t stok;
321
322 stok = dma_map_single(dev, &adapter->stats,
323 sizeof(struct ibmvnic_statistics),
324 DMA_FROM_DEVICE);
325 if (dma_mapping_error(dev, stok)) {
326 dev_err(dev, "Couldn't map stats buffer\n");
327 return -1;
328 }
329
330 adapter->stats_token = stok;
331 return 0;
332 }
333
334 static void release_rx_pools(struct ibmvnic_adapter *adapter)
335 {
336 struct ibmvnic_rx_pool *rx_pool;
337 int rx_scrqs;
338 int i, j;
339
340 if (!adapter->rx_pool)
341 return;
342
343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 for (i = 0; i < rx_scrqs; i++) {
345 rx_pool = &adapter->rx_pool[i];
346
347 kfree(rx_pool->free_map);
348 free_long_term_buff(adapter, &rx_pool->long_term_buff);
349
350 if (!rx_pool->rx_buff)
351 continue;
352
353 for (j = 0; j < rx_pool->size; j++) {
354 if (rx_pool->rx_buff[j].skb) {
355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
356 rx_pool->rx_buff[i].skb = NULL;
357 }
358 }
359
360 kfree(rx_pool->rx_buff);
361 }
362
363 kfree(adapter->rx_pool);
364 adapter->rx_pool = NULL;
365 }
366
367 static int init_rx_pools(struct net_device *netdev)
368 {
369 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
370 struct device *dev = &adapter->vdev->dev;
371 struct ibmvnic_rx_pool *rx_pool;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int i, j;
375
376 rxadd_subcrqs =
377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
380
381 adapter->rx_pool = kcalloc(rxadd_subcrqs,
382 sizeof(struct ibmvnic_rx_pool),
383 GFP_KERNEL);
384 if (!adapter->rx_pool) {
385 dev_err(dev, "Failed to allocate rx pools\n");
386 return -1;
387 }
388
389 for (i = 0; i < rxadd_subcrqs; i++) {
390 rx_pool = &adapter->rx_pool[i];
391
392 netdev_dbg(adapter->netdev,
393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
394 i, adapter->req_rx_add_entries_per_subcrq,
395 be64_to_cpu(size_array[i]));
396
397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
398 rx_pool->index = i;
399 rx_pool->buff_size = be64_to_cpu(size_array[i]);
400 rx_pool->active = 1;
401
402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
403 GFP_KERNEL);
404 if (!rx_pool->free_map) {
405 release_rx_pools(adapter);
406 return -1;
407 }
408
409 rx_pool->rx_buff = kcalloc(rx_pool->size,
410 sizeof(struct ibmvnic_rx_buff),
411 GFP_KERNEL);
412 if (!rx_pool->rx_buff) {
413 dev_err(dev, "Couldn't alloc rx buffers\n");
414 release_rx_pools(adapter);
415 return -1;
416 }
417
418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
419 rx_pool->size * rx_pool->buff_size)) {
420 release_rx_pools(adapter);
421 return -1;
422 }
423
424 for (j = 0; j < rx_pool->size; ++j)
425 rx_pool->free_map[j] = j;
426
427 atomic_set(&rx_pool->available, 0);
428 rx_pool->next_alloc = 0;
429 rx_pool->next_free = 0;
430 }
431
432 return 0;
433 }
434
435 static void release_tx_pools(struct ibmvnic_adapter *adapter)
436 {
437 struct ibmvnic_tx_pool *tx_pool;
438 int i, tx_scrqs;
439
440 if (!adapter->tx_pool)
441 return;
442
443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
444 for (i = 0; i < tx_scrqs; i++) {
445 tx_pool = &adapter->tx_pool[i];
446 kfree(tx_pool->tx_buff);
447 free_long_term_buff(adapter, &tx_pool->long_term_buff);
448 kfree(tx_pool->free_map);
449 }
450
451 kfree(adapter->tx_pool);
452 adapter->tx_pool = NULL;
453 }
454
455 static int init_tx_pools(struct net_device *netdev)
456 {
457 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
458 struct device *dev = &adapter->vdev->dev;
459 struct ibmvnic_tx_pool *tx_pool;
460 int tx_subcrqs;
461 int i, j;
462
463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
464 adapter->tx_pool = kcalloc(tx_subcrqs,
465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
466 if (!adapter->tx_pool)
467 return -1;
468
469 for (i = 0; i < tx_subcrqs; i++) {
470 tx_pool = &adapter->tx_pool[i];
471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
472 sizeof(struct ibmvnic_tx_buff),
473 GFP_KERNEL);
474 if (!tx_pool->tx_buff) {
475 dev_err(dev, "tx pool buffer allocation failed\n");
476 release_tx_pools(adapter);
477 return -1;
478 }
479
480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
481 adapter->req_tx_entries_per_subcrq *
482 adapter->req_mtu)) {
483 release_tx_pools(adapter);
484 return -1;
485 }
486
487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
488 sizeof(int), GFP_KERNEL);
489 if (!tx_pool->free_map) {
490 release_tx_pools(adapter);
491 return -1;
492 }
493
494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
495 tx_pool->free_map[j] = j;
496
497 tx_pool->consumer_index = 0;
498 tx_pool->producer_index = 0;
499 }
500
501 return 0;
502 }
503
504 static void release_error_buffers(struct ibmvnic_adapter *adapter)
505 {
506 struct device *dev = &adapter->vdev->dev;
507 struct ibmvnic_error_buff *error_buff, *tmp;
508 unsigned long flags;
509
510 spin_lock_irqsave(&adapter->error_list_lock, flags);
511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
512 list_del(&error_buff->list);
513 dma_unmap_single(dev, error_buff->dma, error_buff->len,
514 DMA_FROM_DEVICE);
515 kfree(error_buff->buff);
516 kfree(error_buff);
517 }
518 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
519 }
520
521 static int ibmvnic_login(struct net_device *netdev)
522 {
523 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
524 unsigned long timeout = msecs_to_jiffies(30000);
525 struct device *dev = &adapter->vdev->dev;
526
527 do {
528 if (adapter->renegotiate) {
529 adapter->renegotiate = false;
530 release_sub_crqs(adapter);
531
532 reinit_completion(&adapter->init_done);
533 send_cap_queries(adapter);
534 if (!wait_for_completion_timeout(&adapter->init_done,
535 timeout)) {
536 dev_err(dev, "Capabilities query timeout\n");
537 return -1;
538 }
539 }
540
541 reinit_completion(&adapter->init_done);
542 send_login(adapter);
543 if (!wait_for_completion_timeout(&adapter->init_done,
544 timeout)) {
545 dev_err(dev, "Login timeout\n");
546 return -1;
547 }
548 } while (adapter->renegotiate);
549
550 return 0;
551 }
552
553 static void release_resources(struct ibmvnic_adapter *adapter)
554 {
555 int i;
556
557 release_tx_pools(adapter);
558 release_rx_pools(adapter);
559
560 release_stats_token(adapter);
561 release_error_buffers(adapter);
562
563 if (adapter->napi) {
564 for (i = 0; i < adapter->req_rx_queues; i++) {
565 if (&adapter->napi[i])
566 netif_napi_del(&adapter->napi[i]);
567 }
568 }
569 }
570
571 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
572 {
573 struct net_device *netdev = adapter->netdev;
574 unsigned long timeout = msecs_to_jiffies(30000);
575 union ibmvnic_crq crq;
576 bool resend;
577 int rc;
578
579 netdev_err(netdev, "setting link state %d\n", link_state);
580 memset(&crq, 0, sizeof(crq));
581 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
582 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
583 crq.logical_link_state.link_state = link_state;
584
585 do {
586 resend = false;
587
588 reinit_completion(&adapter->init_done);
589 rc = ibmvnic_send_crq(adapter, &crq);
590 if (rc) {
591 netdev_err(netdev, "Failed to set link state\n");
592 return rc;
593 }
594
595 if (!wait_for_completion_timeout(&adapter->init_done,
596 timeout)) {
597 netdev_err(netdev, "timeout setting link state\n");
598 return -1;
599 }
600
601 if (adapter->init_done_rc == 1) {
602 /* Partuial success, delay and re-send */
603 mdelay(1000);
604 resend = true;
605 }
606 } while (resend);
607
608 return 0;
609 }
610
611 static int set_real_num_queues(struct net_device *netdev)
612 {
613 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
614 int rc;
615
616 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
617 if (rc) {
618 netdev_err(netdev, "failed to set the number of tx queues\n");
619 return rc;
620 }
621
622 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
623 if (rc)
624 netdev_err(netdev, "failed to set the number of rx queues\n");
625
626 return rc;
627 }
628
629 static int init_resources(struct ibmvnic_adapter *adapter)
630 {
631 struct net_device *netdev = adapter->netdev;
632 int i, rc;
633
634 rc = set_real_num_queues(netdev);
635 if (rc)
636 return rc;
637
638 rc = init_sub_crq_irqs(adapter);
639 if (rc) {
640 netdev_err(netdev, "failed to initialize sub crq irqs\n");
641 return -1;
642 }
643
644 rc = init_stats_token(adapter);
645 if (rc)
646 return rc;
647
648 adapter->map_id = 1;
649 adapter->napi = kcalloc(adapter->req_rx_queues,
650 sizeof(struct napi_struct), GFP_KERNEL);
651 if (!adapter->napi)
652 return -ENOMEM;
653
654 for (i = 0; i < adapter->req_rx_queues; i++) {
655 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
656 NAPI_POLL_WEIGHT);
657 }
658
659 send_map_query(adapter);
660
661 rc = init_rx_pools(netdev);
662 if (rc)
663 return rc;
664
665 rc = init_tx_pools(netdev);
666 return rc;
667 }
668
669 static int __ibmvnic_open(struct net_device *netdev)
670 {
671 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
672 enum vnic_state prev_state = adapter->state;
673 int i, rc;
674
675 adapter->state = VNIC_OPENING;
676 replenish_pools(adapter);
677
678 for (i = 0; i < adapter->req_rx_queues; i++)
679 napi_enable(&adapter->napi[i]);
680
681 /* We're ready to receive frames, enable the sub-crq interrupts and
682 * set the logical link state to up
683 */
684 for (i = 0; i < adapter->req_rx_queues; i++) {
685 if (prev_state == VNIC_CLOSED)
686 enable_irq(adapter->rx_scrq[i]->irq);
687 else
688 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
689 }
690
691 for (i = 0; i < adapter->req_tx_queues; i++) {
692 if (prev_state == VNIC_CLOSED)
693 enable_irq(adapter->tx_scrq[i]->irq);
694 else
695 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
696 }
697
698 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
699 if (rc) {
700 for (i = 0; i < adapter->req_rx_queues; i++)
701 napi_disable(&adapter->napi[i]);
702 release_resources(adapter);
703 return rc;
704 }
705
706 netif_tx_start_all_queues(netdev);
707
708 if (prev_state == VNIC_CLOSED) {
709 for (i = 0; i < adapter->req_rx_queues; i++)
710 napi_schedule(&adapter->napi[i]);
711 }
712
713 adapter->state = VNIC_OPEN;
714 return rc;
715 }
716
717 static int ibmvnic_open(struct net_device *netdev)
718 {
719 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
720 int rc;
721
722 mutex_lock(&adapter->reset_lock);
723
724 if (adapter->state != VNIC_CLOSED) {
725 rc = ibmvnic_login(netdev);
726 if (rc) {
727 mutex_unlock(&adapter->reset_lock);
728 return rc;
729 }
730
731 rc = init_resources(adapter);
732 if (rc) {
733 netdev_err(netdev, "failed to initialize resources\n");
734 release_resources(adapter);
735 mutex_unlock(&adapter->reset_lock);
736 return rc;
737 }
738 }
739
740 rc = __ibmvnic_open(netdev);
741 mutex_unlock(&adapter->reset_lock);
742
743 return rc;
744 }
745
746 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
747 {
748 struct ibmvnic_tx_pool *tx_pool;
749 u64 tx_entries;
750 int tx_scrqs;
751 int i, j;
752
753 if (!adapter->tx_pool)
754 return;
755
756 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
757 tx_entries = adapter->req_tx_entries_per_subcrq;
758
759 /* Free any remaining skbs in the tx buffer pools */
760 for (i = 0; i < tx_scrqs; i++) {
761 tx_pool = &adapter->tx_pool[i];
762 if (!tx_pool)
763 continue;
764
765 for (j = 0; j < tx_entries; j++) {
766 if (tx_pool->tx_buff[j].skb) {
767 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
768 tx_pool->tx_buff[j].skb = NULL;
769 }
770 }
771 }
772 }
773
774 static int __ibmvnic_close(struct net_device *netdev)
775 {
776 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
777 int rc = 0;
778 int i;
779
780 adapter->state = VNIC_CLOSING;
781 netif_tx_stop_all_queues(netdev);
782
783 if (adapter->napi) {
784 for (i = 0; i < adapter->req_rx_queues; i++)
785 napi_disable(&adapter->napi[i]);
786 }
787
788 clean_tx_pools(adapter);
789
790 if (adapter->tx_scrq) {
791 for (i = 0; i < adapter->req_tx_queues; i++)
792 if (adapter->tx_scrq[i]->irq)
793 disable_irq(adapter->tx_scrq[i]->irq);
794 }
795
796 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
797 if (rc)
798 return rc;
799
800 if (adapter->rx_scrq) {
801 for (i = 0; i < adapter->req_rx_queues; i++) {
802 int retries = 10;
803
804 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
805 retries--;
806 mdelay(100);
807
808 if (retries == 0)
809 break;
810 }
811
812 if (adapter->rx_scrq[i]->irq)
813 disable_irq(adapter->rx_scrq[i]->irq);
814 }
815 }
816
817 adapter->state = VNIC_CLOSED;
818 return rc;
819 }
820
821 static int ibmvnic_close(struct net_device *netdev)
822 {
823 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
824 int rc;
825
826 mutex_lock(&adapter->reset_lock);
827 rc = __ibmvnic_close(netdev);
828 mutex_unlock(&adapter->reset_lock);
829
830 return rc;
831 }
832
833 /**
834 * build_hdr_data - creates L2/L3/L4 header data buffer
835 * @hdr_field - bitfield determining needed headers
836 * @skb - socket buffer
837 * @hdr_len - array of header lengths
838 * @tot_len - total length of data
839 *
840 * Reads hdr_field to determine which headers are needed by firmware.
841 * Builds a buffer containing these headers. Saves individual header
842 * lengths and total buffer length to be used to build descriptors.
843 */
844 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
845 int *hdr_len, u8 *hdr_data)
846 {
847 int len = 0;
848 u8 *hdr;
849
850 hdr_len[0] = sizeof(struct ethhdr);
851
852 if (skb->protocol == htons(ETH_P_IP)) {
853 hdr_len[1] = ip_hdr(skb)->ihl * 4;
854 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
855 hdr_len[2] = tcp_hdrlen(skb);
856 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
857 hdr_len[2] = sizeof(struct udphdr);
858 } else if (skb->protocol == htons(ETH_P_IPV6)) {
859 hdr_len[1] = sizeof(struct ipv6hdr);
860 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
861 hdr_len[2] = tcp_hdrlen(skb);
862 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
863 hdr_len[2] = sizeof(struct udphdr);
864 }
865
866 memset(hdr_data, 0, 120);
867 if ((hdr_field >> 6) & 1) {
868 hdr = skb_mac_header(skb);
869 memcpy(hdr_data, hdr, hdr_len[0]);
870 len += hdr_len[0];
871 }
872
873 if ((hdr_field >> 5) & 1) {
874 hdr = skb_network_header(skb);
875 memcpy(hdr_data + len, hdr, hdr_len[1]);
876 len += hdr_len[1];
877 }
878
879 if ((hdr_field >> 4) & 1) {
880 hdr = skb_transport_header(skb);
881 memcpy(hdr_data + len, hdr, hdr_len[2]);
882 len += hdr_len[2];
883 }
884 return len;
885 }
886
887 /**
888 * create_hdr_descs - create header and header extension descriptors
889 * @hdr_field - bitfield determining needed headers
890 * @data - buffer containing header data
891 * @len - length of data buffer
892 * @hdr_len - array of individual header lengths
893 * @scrq_arr - descriptor array
894 *
895 * Creates header and, if needed, header extension descriptors and
896 * places them in a descriptor array, scrq_arr
897 */
898
899 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
900 union sub_crq *scrq_arr)
901 {
902 union sub_crq hdr_desc;
903 int tmp_len = len;
904 u8 *data, *cur;
905 int tmp;
906
907 while (tmp_len > 0) {
908 cur = hdr_data + len - tmp_len;
909
910 memset(&hdr_desc, 0, sizeof(hdr_desc));
911 if (cur != hdr_data) {
912 data = hdr_desc.hdr_ext.data;
913 tmp = tmp_len > 29 ? 29 : tmp_len;
914 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
915 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
916 hdr_desc.hdr_ext.len = tmp;
917 } else {
918 data = hdr_desc.hdr.data;
919 tmp = tmp_len > 24 ? 24 : tmp_len;
920 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
921 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
922 hdr_desc.hdr.len = tmp;
923 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
924 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
925 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
926 hdr_desc.hdr.flag = hdr_field << 1;
927 }
928 memcpy(data, cur, tmp);
929 tmp_len -= tmp;
930 *scrq_arr = hdr_desc;
931 scrq_arr++;
932 }
933 }
934
935 /**
936 * build_hdr_descs_arr - build a header descriptor array
937 * @skb - socket buffer
938 * @num_entries - number of descriptors to be sent
939 * @subcrq - first TX descriptor
940 * @hdr_field - bit field determining which headers will be sent
941 *
942 * This function will build a TX descriptor array with applicable
943 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
944 */
945
946 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
947 int *num_entries, u8 hdr_field)
948 {
949 int hdr_len[3] = {0, 0, 0};
950 int tot_len, len;
951 u8 *hdr_data = txbuff->hdr_data;
952
953 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
954 txbuff->hdr_data);
955 len = tot_len;
956 len -= 24;
957 if (len > 0)
958 num_entries += len % 29 ? len / 29 + 1 : len / 29;
959 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
960 txbuff->indir_arr + 1);
961 }
962
963 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
964 {
965 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
966 int queue_num = skb_get_queue_mapping(skb);
967 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
968 struct device *dev = &adapter->vdev->dev;
969 struct ibmvnic_tx_buff *tx_buff = NULL;
970 struct ibmvnic_sub_crq_queue *tx_scrq;
971 struct ibmvnic_tx_pool *tx_pool;
972 unsigned int tx_send_failed = 0;
973 unsigned int tx_map_failed = 0;
974 unsigned int tx_dropped = 0;
975 unsigned int tx_packets = 0;
976 unsigned int tx_bytes = 0;
977 dma_addr_t data_dma_addr;
978 struct netdev_queue *txq;
979 unsigned long lpar_rc;
980 union sub_crq tx_crq;
981 unsigned int offset;
982 int num_entries = 1;
983 unsigned char *dst;
984 u64 *handle_array;
985 int index = 0;
986 int ret = 0;
987
988 if (adapter->resetting) {
989 if (!netif_subqueue_stopped(netdev, skb))
990 netif_stop_subqueue(netdev, queue_num);
991 dev_kfree_skb_any(skb);
992
993 tx_send_failed++;
994 tx_dropped++;
995 ret = NETDEV_TX_OK;
996 goto out;
997 }
998
999 tx_pool = &adapter->tx_pool[queue_num];
1000 tx_scrq = adapter->tx_scrq[queue_num];
1001 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1002 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1003 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1004
1005 index = tx_pool->free_map[tx_pool->consumer_index];
1006 offset = index * adapter->req_mtu;
1007 dst = tx_pool->long_term_buff.buff + offset;
1008 memset(dst, 0, adapter->req_mtu);
1009 skb_copy_from_linear_data(skb, dst, skb->len);
1010 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1011
1012 tx_pool->consumer_index =
1013 (tx_pool->consumer_index + 1) %
1014 adapter->req_tx_entries_per_subcrq;
1015
1016 tx_buff = &tx_pool->tx_buff[index];
1017 tx_buff->skb = skb;
1018 tx_buff->data_dma[0] = data_dma_addr;
1019 tx_buff->data_len[0] = skb->len;
1020 tx_buff->index = index;
1021 tx_buff->pool_index = queue_num;
1022 tx_buff->last_frag = true;
1023
1024 memset(&tx_crq, 0, sizeof(tx_crq));
1025 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1026 tx_crq.v1.type = IBMVNIC_TX_DESC;
1027 tx_crq.v1.n_crq_elem = 1;
1028 tx_crq.v1.n_sge = 1;
1029 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1030 tx_crq.v1.correlator = cpu_to_be32(index);
1031 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1032 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1033 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1034
1035 if (adapter->vlan_header_insertion) {
1036 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1037 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1038 }
1039
1040 if (skb->protocol == htons(ETH_P_IP)) {
1041 if (ip_hdr(skb)->version == 4)
1042 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1043 else if (ip_hdr(skb)->version == 6)
1044 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1045
1046 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1047 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1048 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1049 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1050 }
1051
1052 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1053 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1054 hdrs += 2;
1055 }
1056 /* determine if l2/3/4 headers are sent to firmware */
1057 if ((*hdrs >> 7) & 1 &&
1058 (skb->protocol == htons(ETH_P_IP) ||
1059 skb->protocol == htons(ETH_P_IPV6))) {
1060 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1061 tx_crq.v1.n_crq_elem = num_entries;
1062 tx_buff->indir_arr[0] = tx_crq;
1063 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1064 sizeof(tx_buff->indir_arr),
1065 DMA_TO_DEVICE);
1066 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1067 dev_kfree_skb_any(skb);
1068 tx_buff->skb = NULL;
1069 if (!firmware_has_feature(FW_FEATURE_CMO))
1070 dev_err(dev, "tx: unable to map descriptor array\n");
1071 tx_map_failed++;
1072 tx_dropped++;
1073 ret = NETDEV_TX_OK;
1074 goto out;
1075 }
1076 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1077 (u64)tx_buff->indir_dma,
1078 (u64)num_entries);
1079 } else {
1080 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1081 &tx_crq);
1082 }
1083 if (lpar_rc != H_SUCCESS) {
1084 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1085
1086 if (tx_pool->consumer_index == 0)
1087 tx_pool->consumer_index =
1088 adapter->req_tx_entries_per_subcrq - 1;
1089 else
1090 tx_pool->consumer_index--;
1091
1092 dev_kfree_skb_any(skb);
1093 tx_buff->skb = NULL;
1094
1095 if (lpar_rc == H_CLOSED)
1096 netif_stop_subqueue(netdev, queue_num);
1097
1098 tx_send_failed++;
1099 tx_dropped++;
1100 ret = NETDEV_TX_OK;
1101 goto out;
1102 }
1103
1104 if (atomic_inc_return(&tx_scrq->used)
1105 >= adapter->req_tx_entries_per_subcrq) {
1106 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1107 netif_stop_subqueue(netdev, queue_num);
1108 }
1109
1110 tx_packets++;
1111 tx_bytes += skb->len;
1112 txq->trans_start = jiffies;
1113 ret = NETDEV_TX_OK;
1114
1115 out:
1116 netdev->stats.tx_dropped += tx_dropped;
1117 netdev->stats.tx_bytes += tx_bytes;
1118 netdev->stats.tx_packets += tx_packets;
1119 adapter->tx_send_failed += tx_send_failed;
1120 adapter->tx_map_failed += tx_map_failed;
1121
1122 return ret;
1123 }
1124
1125 static void ibmvnic_set_multi(struct net_device *netdev)
1126 {
1127 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1128 struct netdev_hw_addr *ha;
1129 union ibmvnic_crq crq;
1130
1131 memset(&crq, 0, sizeof(crq));
1132 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1133 crq.request_capability.cmd = REQUEST_CAPABILITY;
1134
1135 if (netdev->flags & IFF_PROMISC) {
1136 if (!adapter->promisc_supported)
1137 return;
1138 } else {
1139 if (netdev->flags & IFF_ALLMULTI) {
1140 /* Accept all multicast */
1141 memset(&crq, 0, sizeof(crq));
1142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1143 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1144 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1145 ibmvnic_send_crq(adapter, &crq);
1146 } else if (netdev_mc_empty(netdev)) {
1147 /* Reject all multicast */
1148 memset(&crq, 0, sizeof(crq));
1149 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1150 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1151 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1152 ibmvnic_send_crq(adapter, &crq);
1153 } else {
1154 /* Accept one or more multicast(s) */
1155 netdev_for_each_mc_addr(ha, netdev) {
1156 memset(&crq, 0, sizeof(crq));
1157 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1158 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1159 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1160 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1161 ha->addr);
1162 ibmvnic_send_crq(adapter, &crq);
1163 }
1164 }
1165 }
1166 }
1167
1168 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1169 {
1170 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1171 struct sockaddr *addr = p;
1172 union ibmvnic_crq crq;
1173
1174 if (!is_valid_ether_addr(addr->sa_data))
1175 return -EADDRNOTAVAIL;
1176
1177 memset(&crq, 0, sizeof(crq));
1178 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1179 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1180 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1181 ibmvnic_send_crq(adapter, &crq);
1182 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1183 return 0;
1184 }
1185
1186 /**
1187 * do_reset returns zero if we are able to keep processing reset events, or
1188 * non-zero if we hit a fatal error and must halt.
1189 */
1190 static int do_reset(struct ibmvnic_adapter *adapter,
1191 struct ibmvnic_rwi *rwi, u32 reset_state)
1192 {
1193 struct net_device *netdev = adapter->netdev;
1194 int i, rc;
1195
1196 netif_carrier_off(netdev);
1197 adapter->reset_reason = rwi->reset_reason;
1198
1199 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1200 rc = ibmvnic_reenable_crq_queue(adapter);
1201 if (rc)
1202 return 0;
1203 }
1204
1205 rc = __ibmvnic_close(netdev);
1206 if (rc)
1207 return rc;
1208
1209 /* remove the closed state so when we call open it appears
1210 * we are coming from the probed state.
1211 */
1212 adapter->state = VNIC_PROBED;
1213
1214 release_resources(adapter);
1215 release_sub_crqs(adapter);
1216 release_crq_queue(adapter);
1217
1218 rc = ibmvnic_init(adapter);
1219 if (rc)
1220 return 0;
1221
1222 /* If the adapter was in PROBE state prior to the reset, exit here. */
1223 if (reset_state == VNIC_PROBED)
1224 return 0;
1225
1226 rc = ibmvnic_login(netdev);
1227 if (rc) {
1228 adapter->state = VNIC_PROBED;
1229 return 0;
1230 }
1231
1232 rtnl_lock();
1233 rc = init_resources(adapter);
1234 rtnl_unlock();
1235 if (rc)
1236 return rc;
1237
1238 if (reset_state == VNIC_CLOSED)
1239 return 0;
1240
1241 rc = __ibmvnic_open(netdev);
1242 if (rc) {
1243 if (list_empty(&adapter->rwi_list))
1244 adapter->state = VNIC_CLOSED;
1245 else
1246 adapter->state = reset_state;
1247
1248 return 0;
1249 }
1250
1251 netif_carrier_on(netdev);
1252
1253 /* kick napi */
1254 for (i = 0; i < adapter->req_rx_queues; i++)
1255 napi_schedule(&adapter->napi[i]);
1256
1257 return 0;
1258 }
1259
1260 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1261 {
1262 struct ibmvnic_rwi *rwi;
1263
1264 mutex_lock(&adapter->rwi_lock);
1265
1266 if (!list_empty(&adapter->rwi_list)) {
1267 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1268 list);
1269 list_del(&rwi->list);
1270 } else {
1271 rwi = NULL;
1272 }
1273
1274 mutex_unlock(&adapter->rwi_lock);
1275 return rwi;
1276 }
1277
1278 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1279 {
1280 struct ibmvnic_rwi *rwi;
1281
1282 rwi = get_next_rwi(adapter);
1283 while (rwi) {
1284 kfree(rwi);
1285 rwi = get_next_rwi(adapter);
1286 }
1287 }
1288
1289 static void __ibmvnic_reset(struct work_struct *work)
1290 {
1291 struct ibmvnic_rwi *rwi;
1292 struct ibmvnic_adapter *adapter;
1293 struct net_device *netdev;
1294 u32 reset_state;
1295 int rc;
1296
1297 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1298 netdev = adapter->netdev;
1299
1300 mutex_lock(&adapter->reset_lock);
1301 adapter->resetting = true;
1302 reset_state = adapter->state;
1303
1304 rwi = get_next_rwi(adapter);
1305 while (rwi) {
1306 rc = do_reset(adapter, rwi, reset_state);
1307 kfree(rwi);
1308 if (rc)
1309 break;
1310
1311 rwi = get_next_rwi(adapter);
1312 }
1313
1314 if (rc) {
1315 free_all_rwi(adapter);
1316 return;
1317 }
1318
1319 adapter->resetting = false;
1320 mutex_unlock(&adapter->reset_lock);
1321 }
1322
1323 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1324 enum ibmvnic_reset_reason reason)
1325 {
1326 struct ibmvnic_rwi *rwi, *tmp;
1327 struct net_device *netdev = adapter->netdev;
1328 struct list_head *entry;
1329
1330 if (adapter->state == VNIC_REMOVING ||
1331 adapter->state == VNIC_REMOVED) {
1332 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1333 return;
1334 }
1335
1336 mutex_lock(&adapter->rwi_lock);
1337
1338 list_for_each(entry, &adapter->rwi_list) {
1339 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1340 if (tmp->reset_reason == reason) {
1341 netdev_err(netdev, "Matching reset found, skipping\n");
1342 mutex_unlock(&adapter->rwi_lock);
1343 return;
1344 }
1345 }
1346
1347 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1348 if (!rwi) {
1349 mutex_unlock(&adapter->rwi_lock);
1350 ibmvnic_close(netdev);
1351 return;
1352 }
1353
1354 rwi->reset_reason = reason;
1355 list_add_tail(&rwi->list, &adapter->rwi_list);
1356 mutex_unlock(&adapter->rwi_lock);
1357 schedule_work(&adapter->ibmvnic_reset);
1358 }
1359
1360 static void ibmvnic_tx_timeout(struct net_device *dev)
1361 {
1362 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1363
1364 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1365 }
1366
1367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1368 struct ibmvnic_rx_buff *rx_buff)
1369 {
1370 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1371
1372 rx_buff->skb = NULL;
1373
1374 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1375 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1376
1377 atomic_dec(&pool->available);
1378 }
1379
1380 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1381 {
1382 struct net_device *netdev = napi->dev;
1383 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1384 int scrq_num = (int)(napi - adapter->napi);
1385 int frames_processed = 0;
1386 restart_poll:
1387 while (frames_processed < budget) {
1388 struct sk_buff *skb;
1389 struct ibmvnic_rx_buff *rx_buff;
1390 union sub_crq *next;
1391 u32 length;
1392 u16 offset;
1393 u8 flags = 0;
1394
1395 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1396 break;
1397 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1398 rx_buff =
1399 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1400 rx_comp.correlator);
1401 /* do error checking */
1402 if (next->rx_comp.rc) {
1403 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1404 /* free the entry */
1405 next->rx_comp.first = 0;
1406 remove_buff_from_pool(adapter, rx_buff);
1407 continue;
1408 }
1409
1410 length = be32_to_cpu(next->rx_comp.len);
1411 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1412 flags = next->rx_comp.flags;
1413 skb = rx_buff->skb;
1414 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1415 length);
1416
1417 /* VLAN Header has been stripped by the system firmware and
1418 * needs to be inserted by the driver
1419 */
1420 if (adapter->rx_vlan_header_insertion &&
1421 (flags & IBMVNIC_VLAN_STRIPPED))
1422 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1423 ntohs(next->rx_comp.vlan_tci));
1424
1425 /* free the entry */
1426 next->rx_comp.first = 0;
1427 remove_buff_from_pool(adapter, rx_buff);
1428
1429 skb_put(skb, length);
1430 skb->protocol = eth_type_trans(skb, netdev);
1431 skb_record_rx_queue(skb, scrq_num);
1432
1433 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1434 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1435 skb->ip_summed = CHECKSUM_UNNECESSARY;
1436 }
1437
1438 length = skb->len;
1439 napi_gro_receive(napi, skb); /* send it up */
1440 netdev->stats.rx_packets++;
1441 netdev->stats.rx_bytes += length;
1442 frames_processed++;
1443 }
1444 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1445
1446 if (frames_processed < budget) {
1447 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1448 napi_complete_done(napi, frames_processed);
1449 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1450 napi_reschedule(napi)) {
1451 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1452 goto restart_poll;
1453 }
1454 }
1455 return frames_processed;
1456 }
1457
1458 #ifdef CONFIG_NET_POLL_CONTROLLER
1459 static void ibmvnic_netpoll_controller(struct net_device *dev)
1460 {
1461 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1462 int i;
1463
1464 replenish_pools(netdev_priv(dev));
1465 for (i = 0; i < adapter->req_rx_queues; i++)
1466 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1467 adapter->rx_scrq[i]);
1468 }
1469 #endif
1470
1471 static const struct net_device_ops ibmvnic_netdev_ops = {
1472 .ndo_open = ibmvnic_open,
1473 .ndo_stop = ibmvnic_close,
1474 .ndo_start_xmit = ibmvnic_xmit,
1475 .ndo_set_rx_mode = ibmvnic_set_multi,
1476 .ndo_set_mac_address = ibmvnic_set_mac,
1477 .ndo_validate_addr = eth_validate_addr,
1478 .ndo_tx_timeout = ibmvnic_tx_timeout,
1479 #ifdef CONFIG_NET_POLL_CONTROLLER
1480 .ndo_poll_controller = ibmvnic_netpoll_controller,
1481 #endif
1482 };
1483
1484 /* ethtool functions */
1485
1486 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1487 struct ethtool_link_ksettings *cmd)
1488 {
1489 u32 supported, advertising;
1490
1491 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1492 SUPPORTED_FIBRE);
1493 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1494 ADVERTISED_FIBRE);
1495 cmd->base.speed = SPEED_1000;
1496 cmd->base.duplex = DUPLEX_FULL;
1497 cmd->base.port = PORT_FIBRE;
1498 cmd->base.phy_address = 0;
1499 cmd->base.autoneg = AUTONEG_ENABLE;
1500
1501 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1502 supported);
1503 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1504 advertising);
1505
1506 return 0;
1507 }
1508
1509 static void ibmvnic_get_drvinfo(struct net_device *dev,
1510 struct ethtool_drvinfo *info)
1511 {
1512 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1513 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1514 }
1515
1516 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1517 {
1518 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1519
1520 return adapter->msg_enable;
1521 }
1522
1523 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1524 {
1525 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1526
1527 adapter->msg_enable = data;
1528 }
1529
1530 static u32 ibmvnic_get_link(struct net_device *netdev)
1531 {
1532 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1533
1534 /* Don't need to send a query because we request a logical link up at
1535 * init and then we wait for link state indications
1536 */
1537 return adapter->logical_link_state;
1538 }
1539
1540 static void ibmvnic_get_ringparam(struct net_device *netdev,
1541 struct ethtool_ringparam *ring)
1542 {
1543 ring->rx_max_pending = 0;
1544 ring->tx_max_pending = 0;
1545 ring->rx_mini_max_pending = 0;
1546 ring->rx_jumbo_max_pending = 0;
1547 ring->rx_pending = 0;
1548 ring->tx_pending = 0;
1549 ring->rx_mini_pending = 0;
1550 ring->rx_jumbo_pending = 0;
1551 }
1552
1553 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1554 {
1555 int i;
1556
1557 if (stringset != ETH_SS_STATS)
1558 return;
1559
1560 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1561 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1562 }
1563
1564 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1565 {
1566 switch (sset) {
1567 case ETH_SS_STATS:
1568 return ARRAY_SIZE(ibmvnic_stats);
1569 default:
1570 return -EOPNOTSUPP;
1571 }
1572 }
1573
1574 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1575 struct ethtool_stats *stats, u64 *data)
1576 {
1577 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1578 union ibmvnic_crq crq;
1579 int i;
1580
1581 memset(&crq, 0, sizeof(crq));
1582 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1583 crq.request_statistics.cmd = REQUEST_STATISTICS;
1584 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1585 crq.request_statistics.len =
1586 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1587
1588 /* Wait for data to be written */
1589 init_completion(&adapter->stats_done);
1590 ibmvnic_send_crq(adapter, &crq);
1591 wait_for_completion(&adapter->stats_done);
1592
1593 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1594 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1595 }
1596
1597 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1598 .get_drvinfo = ibmvnic_get_drvinfo,
1599 .get_msglevel = ibmvnic_get_msglevel,
1600 .set_msglevel = ibmvnic_set_msglevel,
1601 .get_link = ibmvnic_get_link,
1602 .get_ringparam = ibmvnic_get_ringparam,
1603 .get_strings = ibmvnic_get_strings,
1604 .get_sset_count = ibmvnic_get_sset_count,
1605 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1606 .get_link_ksettings = ibmvnic_get_link_ksettings,
1607 };
1608
1609 /* Routines for managing CRQs/sCRQs */
1610
1611 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1612 struct ibmvnic_sub_crq_queue *scrq)
1613 {
1614 struct device *dev = &adapter->vdev->dev;
1615 long rc;
1616
1617 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1618
1619 /* Close the sub-crqs */
1620 do {
1621 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1622 adapter->vdev->unit_address,
1623 scrq->crq_num);
1624 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1625
1626 if (rc) {
1627 netdev_err(adapter->netdev,
1628 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1629 scrq->crq_num, rc);
1630 }
1631
1632 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1633 DMA_BIDIRECTIONAL);
1634 free_pages((unsigned long)scrq->msgs, 2);
1635 kfree(scrq);
1636 }
1637
1638 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1639 *adapter)
1640 {
1641 struct device *dev = &adapter->vdev->dev;
1642 struct ibmvnic_sub_crq_queue *scrq;
1643 int rc;
1644
1645 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1646 if (!scrq)
1647 return NULL;
1648
1649 scrq->msgs =
1650 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1651 if (!scrq->msgs) {
1652 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1653 goto zero_page_failed;
1654 }
1655
1656 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1657 DMA_BIDIRECTIONAL);
1658 if (dma_mapping_error(dev, scrq->msg_token)) {
1659 dev_warn(dev, "Couldn't map crq queue messages page\n");
1660 goto map_failed;
1661 }
1662
1663 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1664 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1665
1666 if (rc == H_RESOURCE)
1667 rc = ibmvnic_reset_crq(adapter);
1668
1669 if (rc == H_CLOSED) {
1670 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1671 } else if (rc) {
1672 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1673 goto reg_failed;
1674 }
1675
1676 scrq->adapter = adapter;
1677 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1678 spin_lock_init(&scrq->lock);
1679
1680 netdev_dbg(adapter->netdev,
1681 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1682 scrq->crq_num, scrq->hw_irq, scrq->irq);
1683
1684 return scrq;
1685
1686 reg_failed:
1687 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1688 DMA_BIDIRECTIONAL);
1689 map_failed:
1690 free_pages((unsigned long)scrq->msgs, 2);
1691 zero_page_failed:
1692 kfree(scrq);
1693
1694 return NULL;
1695 }
1696
1697 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1698 {
1699 int i;
1700
1701 if (adapter->tx_scrq) {
1702 for (i = 0; i < adapter->req_tx_queues; i++) {
1703 if (!adapter->tx_scrq[i])
1704 continue;
1705
1706 if (adapter->tx_scrq[i]->irq) {
1707 free_irq(adapter->tx_scrq[i]->irq,
1708 adapter->tx_scrq[i]);
1709 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1710 adapter->tx_scrq[i]->irq = 0;
1711 }
1712
1713 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1714 }
1715
1716 kfree(adapter->tx_scrq);
1717 adapter->tx_scrq = NULL;
1718 }
1719
1720 if (adapter->rx_scrq) {
1721 for (i = 0; i < adapter->req_rx_queues; i++) {
1722 if (!adapter->rx_scrq[i])
1723 continue;
1724
1725 if (adapter->rx_scrq[i]->irq) {
1726 free_irq(adapter->rx_scrq[i]->irq,
1727 adapter->rx_scrq[i]);
1728 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1729 adapter->rx_scrq[i]->irq = 0;
1730 }
1731
1732 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1733 }
1734
1735 kfree(adapter->rx_scrq);
1736 adapter->rx_scrq = NULL;
1737 }
1738 }
1739
1740 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1741 struct ibmvnic_sub_crq_queue *scrq)
1742 {
1743 struct device *dev = &adapter->vdev->dev;
1744 unsigned long rc;
1745
1746 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1747 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1748 if (rc)
1749 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1750 scrq->hw_irq, rc);
1751 return rc;
1752 }
1753
1754 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1755 struct ibmvnic_sub_crq_queue *scrq)
1756 {
1757 struct device *dev = &adapter->vdev->dev;
1758 unsigned long rc;
1759
1760 if (scrq->hw_irq > 0x100000000ULL) {
1761 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1762 return 1;
1763 }
1764
1765 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1766 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1767 if (rc)
1768 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1769 scrq->hw_irq, rc);
1770 return rc;
1771 }
1772
1773 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1774 struct ibmvnic_sub_crq_queue *scrq)
1775 {
1776 struct device *dev = &adapter->vdev->dev;
1777 struct ibmvnic_tx_buff *txbuff;
1778 union sub_crq *next;
1779 int index;
1780 int i, j;
1781 u8 first;
1782
1783 restart_loop:
1784 while (pending_scrq(adapter, scrq)) {
1785 unsigned int pool = scrq->pool_index;
1786
1787 next = ibmvnic_next_scrq(adapter, scrq);
1788 for (i = 0; i < next->tx_comp.num_comps; i++) {
1789 if (next->tx_comp.rcs[i]) {
1790 dev_err(dev, "tx error %x\n",
1791 next->tx_comp.rcs[i]);
1792 continue;
1793 }
1794 index = be32_to_cpu(next->tx_comp.correlators[i]);
1795 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1796
1797 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1798 if (!txbuff->data_dma[j])
1799 continue;
1800
1801 txbuff->data_dma[j] = 0;
1802 }
1803 /* if sub_crq was sent indirectly */
1804 first = txbuff->indir_arr[0].generic.first;
1805 if (first == IBMVNIC_CRQ_CMD) {
1806 dma_unmap_single(dev, txbuff->indir_dma,
1807 sizeof(txbuff->indir_arr),
1808 DMA_TO_DEVICE);
1809 }
1810
1811 if (txbuff->last_frag) {
1812 dev_kfree_skb_any(txbuff->skb);
1813 txbuff->skb = NULL;
1814 }
1815
1816 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1817 producer_index] = index;
1818 adapter->tx_pool[pool].producer_index =
1819 (adapter->tx_pool[pool].producer_index + 1) %
1820 adapter->req_tx_entries_per_subcrq;
1821 }
1822 /* remove tx_comp scrq*/
1823 next->tx_comp.first = 0;
1824
1825 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1826 (adapter->req_tx_entries_per_subcrq / 2) &&
1827 __netif_subqueue_stopped(adapter->netdev,
1828 scrq->pool_index)) {
1829 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1830 netdev_info(adapter->netdev, "Started queue %d\n",
1831 scrq->pool_index);
1832 }
1833 }
1834
1835 enable_scrq_irq(adapter, scrq);
1836
1837 if (pending_scrq(adapter, scrq)) {
1838 disable_scrq_irq(adapter, scrq);
1839 goto restart_loop;
1840 }
1841
1842 return 0;
1843 }
1844
1845 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1846 {
1847 struct ibmvnic_sub_crq_queue *scrq = instance;
1848 struct ibmvnic_adapter *adapter = scrq->adapter;
1849
1850 disable_scrq_irq(adapter, scrq);
1851 ibmvnic_complete_tx(adapter, scrq);
1852
1853 return IRQ_HANDLED;
1854 }
1855
1856 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1857 {
1858 struct ibmvnic_sub_crq_queue *scrq = instance;
1859 struct ibmvnic_adapter *adapter = scrq->adapter;
1860
1861 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1862 disable_scrq_irq(adapter, scrq);
1863 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1864 }
1865
1866 return IRQ_HANDLED;
1867 }
1868
1869 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1870 {
1871 struct device *dev = &adapter->vdev->dev;
1872 struct ibmvnic_sub_crq_queue *scrq;
1873 int i = 0, j = 0;
1874 int rc = 0;
1875
1876 for (i = 0; i < adapter->req_tx_queues; i++) {
1877 scrq = adapter->tx_scrq[i];
1878 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1879
1880 if (!scrq->irq) {
1881 rc = -EINVAL;
1882 dev_err(dev, "Error mapping irq\n");
1883 goto req_tx_irq_failed;
1884 }
1885
1886 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1887 0, "ibmvnic_tx", scrq);
1888
1889 if (rc) {
1890 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1891 scrq->irq, rc);
1892 irq_dispose_mapping(scrq->irq);
1893 goto req_rx_irq_failed;
1894 }
1895 }
1896
1897 for (i = 0; i < adapter->req_rx_queues; i++) {
1898 scrq = adapter->rx_scrq[i];
1899 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1900 if (!scrq->irq) {
1901 rc = -EINVAL;
1902 dev_err(dev, "Error mapping irq\n");
1903 goto req_rx_irq_failed;
1904 }
1905 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1906 0, "ibmvnic_rx", scrq);
1907 if (rc) {
1908 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1909 scrq->irq, rc);
1910 irq_dispose_mapping(scrq->irq);
1911 goto req_rx_irq_failed;
1912 }
1913 }
1914 return rc;
1915
1916 req_rx_irq_failed:
1917 for (j = 0; j < i; j++) {
1918 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1919 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1920 }
1921 i = adapter->req_tx_queues;
1922 req_tx_irq_failed:
1923 for (j = 0; j < i; j++) {
1924 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1925 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1926 }
1927 release_sub_crqs(adapter);
1928 return rc;
1929 }
1930
1931 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
1932 {
1933 struct device *dev = &adapter->vdev->dev;
1934 struct ibmvnic_sub_crq_queue **allqueues;
1935 int registered_queues = 0;
1936 int total_queues;
1937 int more = 0;
1938 int i;
1939
1940 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1941
1942 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
1943 if (!allqueues)
1944 return -1;
1945
1946 for (i = 0; i < total_queues; i++) {
1947 allqueues[i] = init_sub_crq_queue(adapter);
1948 if (!allqueues[i]) {
1949 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1950 break;
1951 }
1952 registered_queues++;
1953 }
1954
1955 /* Make sure we were able to register the minimum number of queues */
1956 if (registered_queues <
1957 adapter->min_tx_queues + adapter->min_rx_queues) {
1958 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1959 goto tx_failed;
1960 }
1961
1962 /* Distribute the failed allocated queues*/
1963 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1964 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1965 switch (i % 3) {
1966 case 0:
1967 if (adapter->req_rx_queues > adapter->min_rx_queues)
1968 adapter->req_rx_queues--;
1969 else
1970 more++;
1971 break;
1972 case 1:
1973 if (adapter->req_tx_queues > adapter->min_tx_queues)
1974 adapter->req_tx_queues--;
1975 else
1976 more++;
1977 break;
1978 }
1979 }
1980
1981 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1982 sizeof(*adapter->tx_scrq), GFP_KERNEL);
1983 if (!adapter->tx_scrq)
1984 goto tx_failed;
1985
1986 for (i = 0; i < adapter->req_tx_queues; i++) {
1987 adapter->tx_scrq[i] = allqueues[i];
1988 adapter->tx_scrq[i]->pool_index = i;
1989 }
1990
1991 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1992 sizeof(*adapter->rx_scrq), GFP_KERNEL);
1993 if (!adapter->rx_scrq)
1994 goto rx_failed;
1995
1996 for (i = 0; i < adapter->req_rx_queues; i++) {
1997 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1998 adapter->rx_scrq[i]->scrq_num = i;
1999 }
2000
2001 kfree(allqueues);
2002 return 0;
2003
2004 rx_failed:
2005 kfree(adapter->tx_scrq);
2006 adapter->tx_scrq = NULL;
2007 tx_failed:
2008 for (i = 0; i < registered_queues; i++)
2009 release_sub_crq_queue(adapter, allqueues[i]);
2010 kfree(allqueues);
2011 return -1;
2012 }
2013
2014 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2015 {
2016 struct device *dev = &adapter->vdev->dev;
2017 union ibmvnic_crq crq;
2018
2019 if (!retry) {
2020 /* Sub-CRQ entries are 32 byte long */
2021 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2022
2023 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2024 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2025 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2026 return;
2027 }
2028
2029 /* Get the minimum between the queried max and the entries
2030 * that fit in our PAGE_SIZE
2031 */
2032 adapter->req_tx_entries_per_subcrq =
2033 adapter->max_tx_entries_per_subcrq > entries_page ?
2034 entries_page : adapter->max_tx_entries_per_subcrq;
2035 adapter->req_rx_add_entries_per_subcrq =
2036 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2037 entries_page : adapter->max_rx_add_entries_per_subcrq;
2038
2039 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2040 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2041 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2042
2043 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2044 }
2045
2046 memset(&crq, 0, sizeof(crq));
2047 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2048 crq.request_capability.cmd = REQUEST_CAPABILITY;
2049
2050 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2051 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2052 atomic_inc(&adapter->running_cap_crqs);
2053 ibmvnic_send_crq(adapter, &crq);
2054
2055 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2056 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2057 atomic_inc(&adapter->running_cap_crqs);
2058 ibmvnic_send_crq(adapter, &crq);
2059
2060 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2061 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2062 atomic_inc(&adapter->running_cap_crqs);
2063 ibmvnic_send_crq(adapter, &crq);
2064
2065 crq.request_capability.capability =
2066 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2067 crq.request_capability.number =
2068 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2069 atomic_inc(&adapter->running_cap_crqs);
2070 ibmvnic_send_crq(adapter, &crq);
2071
2072 crq.request_capability.capability =
2073 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2074 crq.request_capability.number =
2075 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2076 atomic_inc(&adapter->running_cap_crqs);
2077 ibmvnic_send_crq(adapter, &crq);
2078
2079 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2080 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2081 atomic_inc(&adapter->running_cap_crqs);
2082 ibmvnic_send_crq(adapter, &crq);
2083
2084 if (adapter->netdev->flags & IFF_PROMISC) {
2085 if (adapter->promisc_supported) {
2086 crq.request_capability.capability =
2087 cpu_to_be16(PROMISC_REQUESTED);
2088 crq.request_capability.number = cpu_to_be64(1);
2089 atomic_inc(&adapter->running_cap_crqs);
2090 ibmvnic_send_crq(adapter, &crq);
2091 }
2092 } else {
2093 crq.request_capability.capability =
2094 cpu_to_be16(PROMISC_REQUESTED);
2095 crq.request_capability.number = cpu_to_be64(0);
2096 atomic_inc(&adapter->running_cap_crqs);
2097 ibmvnic_send_crq(adapter, &crq);
2098 }
2099 }
2100
2101 static int pending_scrq(struct ibmvnic_adapter *adapter,
2102 struct ibmvnic_sub_crq_queue *scrq)
2103 {
2104 union sub_crq *entry = &scrq->msgs[scrq->cur];
2105
2106 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2107 adapter->state == VNIC_CLOSING)
2108 return 1;
2109 else
2110 return 0;
2111 }
2112
2113 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2114 struct ibmvnic_sub_crq_queue *scrq)
2115 {
2116 union sub_crq *entry;
2117 unsigned long flags;
2118
2119 spin_lock_irqsave(&scrq->lock, flags);
2120 entry = &scrq->msgs[scrq->cur];
2121 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2122 if (++scrq->cur == scrq->size)
2123 scrq->cur = 0;
2124 } else {
2125 entry = NULL;
2126 }
2127 spin_unlock_irqrestore(&scrq->lock, flags);
2128
2129 return entry;
2130 }
2131
2132 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2133 {
2134 struct ibmvnic_crq_queue *queue = &adapter->crq;
2135 union ibmvnic_crq *crq;
2136
2137 crq = &queue->msgs[queue->cur];
2138 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2139 if (++queue->cur == queue->size)
2140 queue->cur = 0;
2141 } else {
2142 crq = NULL;
2143 }
2144
2145 return crq;
2146 }
2147
2148 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2149 union sub_crq *sub_crq)
2150 {
2151 unsigned int ua = adapter->vdev->unit_address;
2152 struct device *dev = &adapter->vdev->dev;
2153 u64 *u64_crq = (u64 *)sub_crq;
2154 int rc;
2155
2156 netdev_dbg(adapter->netdev,
2157 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2158 (unsigned long int)cpu_to_be64(remote_handle),
2159 (unsigned long int)cpu_to_be64(u64_crq[0]),
2160 (unsigned long int)cpu_to_be64(u64_crq[1]),
2161 (unsigned long int)cpu_to_be64(u64_crq[2]),
2162 (unsigned long int)cpu_to_be64(u64_crq[3]));
2163
2164 /* Make sure the hypervisor sees the complete request */
2165 mb();
2166
2167 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2168 cpu_to_be64(remote_handle),
2169 cpu_to_be64(u64_crq[0]),
2170 cpu_to_be64(u64_crq[1]),
2171 cpu_to_be64(u64_crq[2]),
2172 cpu_to_be64(u64_crq[3]));
2173
2174 if (rc) {
2175 if (rc == H_CLOSED)
2176 dev_warn(dev, "CRQ Queue closed\n");
2177 dev_err(dev, "Send error (rc=%d)\n", rc);
2178 }
2179
2180 return rc;
2181 }
2182
2183 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2184 u64 remote_handle, u64 ioba, u64 num_entries)
2185 {
2186 unsigned int ua = adapter->vdev->unit_address;
2187 struct device *dev = &adapter->vdev->dev;
2188 int rc;
2189
2190 /* Make sure the hypervisor sees the complete request */
2191 mb();
2192 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2193 cpu_to_be64(remote_handle),
2194 ioba, num_entries);
2195
2196 if (rc) {
2197 if (rc == H_CLOSED)
2198 dev_warn(dev, "CRQ Queue closed\n");
2199 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2200 }
2201
2202 return rc;
2203 }
2204
2205 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2206 union ibmvnic_crq *crq)
2207 {
2208 unsigned int ua = adapter->vdev->unit_address;
2209 struct device *dev = &adapter->vdev->dev;
2210 u64 *u64_crq = (u64 *)crq;
2211 int rc;
2212
2213 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2214 (unsigned long int)cpu_to_be64(u64_crq[0]),
2215 (unsigned long int)cpu_to_be64(u64_crq[1]));
2216
2217 /* Make sure the hypervisor sees the complete request */
2218 mb();
2219
2220 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2221 cpu_to_be64(u64_crq[0]),
2222 cpu_to_be64(u64_crq[1]));
2223
2224 if (rc) {
2225 if (rc == H_CLOSED)
2226 dev_warn(dev, "CRQ Queue closed\n");
2227 dev_warn(dev, "Send error (rc=%d)\n", rc);
2228 }
2229
2230 return rc;
2231 }
2232
2233 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2234 {
2235 union ibmvnic_crq crq;
2236
2237 memset(&crq, 0, sizeof(crq));
2238 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2239 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2240 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2241
2242 return ibmvnic_send_crq(adapter, &crq);
2243 }
2244
2245 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2246 {
2247 union ibmvnic_crq crq;
2248
2249 memset(&crq, 0, sizeof(crq));
2250 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2251 crq.version_exchange.cmd = VERSION_EXCHANGE;
2252 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2253
2254 return ibmvnic_send_crq(adapter, &crq);
2255 }
2256
2257 static void send_login(struct ibmvnic_adapter *adapter)
2258 {
2259 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2260 struct ibmvnic_login_buffer *login_buffer;
2261 struct device *dev = &adapter->vdev->dev;
2262 dma_addr_t rsp_buffer_token;
2263 dma_addr_t buffer_token;
2264 size_t rsp_buffer_size;
2265 union ibmvnic_crq crq;
2266 size_t buffer_size;
2267 __be64 *tx_list_p;
2268 __be64 *rx_list_p;
2269 int i;
2270
2271 buffer_size =
2272 sizeof(struct ibmvnic_login_buffer) +
2273 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2274
2275 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2276 if (!login_buffer)
2277 goto buf_alloc_failed;
2278
2279 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2280 DMA_TO_DEVICE);
2281 if (dma_mapping_error(dev, buffer_token)) {
2282 dev_err(dev, "Couldn't map login buffer\n");
2283 goto buf_map_failed;
2284 }
2285
2286 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2287 sizeof(u64) * adapter->req_tx_queues +
2288 sizeof(u64) * adapter->req_rx_queues +
2289 sizeof(u64) * adapter->req_rx_queues +
2290 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2291
2292 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2293 if (!login_rsp_buffer)
2294 goto buf_rsp_alloc_failed;
2295
2296 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2297 rsp_buffer_size, DMA_FROM_DEVICE);
2298 if (dma_mapping_error(dev, rsp_buffer_token)) {
2299 dev_err(dev, "Couldn't map login rsp buffer\n");
2300 goto buf_rsp_map_failed;
2301 }
2302
2303 adapter->login_buf = login_buffer;
2304 adapter->login_buf_token = buffer_token;
2305 adapter->login_buf_sz = buffer_size;
2306 adapter->login_rsp_buf = login_rsp_buffer;
2307 adapter->login_rsp_buf_token = rsp_buffer_token;
2308 adapter->login_rsp_buf_sz = rsp_buffer_size;
2309
2310 login_buffer->len = cpu_to_be32(buffer_size);
2311 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2312 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2313 login_buffer->off_txcomp_subcrqs =
2314 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2315 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2316 login_buffer->off_rxcomp_subcrqs =
2317 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2318 sizeof(u64) * adapter->req_tx_queues);
2319 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2320 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2321
2322 tx_list_p = (__be64 *)((char *)login_buffer +
2323 sizeof(struct ibmvnic_login_buffer));
2324 rx_list_p = (__be64 *)((char *)login_buffer +
2325 sizeof(struct ibmvnic_login_buffer) +
2326 sizeof(u64) * adapter->req_tx_queues);
2327
2328 for (i = 0; i < adapter->req_tx_queues; i++) {
2329 if (adapter->tx_scrq[i]) {
2330 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2331 crq_num);
2332 }
2333 }
2334
2335 for (i = 0; i < adapter->req_rx_queues; i++) {
2336 if (adapter->rx_scrq[i]) {
2337 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2338 crq_num);
2339 }
2340 }
2341
2342 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2343 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2344 netdev_dbg(adapter->netdev, "%016lx\n",
2345 ((unsigned long int *)(adapter->login_buf))[i]);
2346 }
2347
2348 memset(&crq, 0, sizeof(crq));
2349 crq.login.first = IBMVNIC_CRQ_CMD;
2350 crq.login.cmd = LOGIN;
2351 crq.login.ioba = cpu_to_be32(buffer_token);
2352 crq.login.len = cpu_to_be32(buffer_size);
2353 ibmvnic_send_crq(adapter, &crq);
2354
2355 return;
2356
2357 buf_rsp_map_failed:
2358 kfree(login_rsp_buffer);
2359 buf_rsp_alloc_failed:
2360 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2361 buf_map_failed:
2362 kfree(login_buffer);
2363 buf_alloc_failed:
2364 return;
2365 }
2366
2367 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2368 u32 len, u8 map_id)
2369 {
2370 union ibmvnic_crq crq;
2371
2372 memset(&crq, 0, sizeof(crq));
2373 crq.request_map.first = IBMVNIC_CRQ_CMD;
2374 crq.request_map.cmd = REQUEST_MAP;
2375 crq.request_map.map_id = map_id;
2376 crq.request_map.ioba = cpu_to_be32(addr);
2377 crq.request_map.len = cpu_to_be32(len);
2378 ibmvnic_send_crq(adapter, &crq);
2379 }
2380
2381 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2382 {
2383 union ibmvnic_crq crq;
2384
2385 memset(&crq, 0, sizeof(crq));
2386 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2387 crq.request_unmap.cmd = REQUEST_UNMAP;
2388 crq.request_unmap.map_id = map_id;
2389 ibmvnic_send_crq(adapter, &crq);
2390 }
2391
2392 static void send_map_query(struct ibmvnic_adapter *adapter)
2393 {
2394 union ibmvnic_crq crq;
2395
2396 memset(&crq, 0, sizeof(crq));
2397 crq.query_map.first = IBMVNIC_CRQ_CMD;
2398 crq.query_map.cmd = QUERY_MAP;
2399 ibmvnic_send_crq(adapter, &crq);
2400 }
2401
2402 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2403 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2404 {
2405 union ibmvnic_crq crq;
2406
2407 atomic_set(&adapter->running_cap_crqs, 0);
2408 memset(&crq, 0, sizeof(crq));
2409 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2410 crq.query_capability.cmd = QUERY_CAPABILITY;
2411
2412 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2413 atomic_inc(&adapter->running_cap_crqs);
2414 ibmvnic_send_crq(adapter, &crq);
2415
2416 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2417 atomic_inc(&adapter->running_cap_crqs);
2418 ibmvnic_send_crq(adapter, &crq);
2419
2420 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2421 atomic_inc(&adapter->running_cap_crqs);
2422 ibmvnic_send_crq(adapter, &crq);
2423
2424 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2425 atomic_inc(&adapter->running_cap_crqs);
2426 ibmvnic_send_crq(adapter, &crq);
2427
2428 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2429 atomic_inc(&adapter->running_cap_crqs);
2430 ibmvnic_send_crq(adapter, &crq);
2431
2432 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2433 atomic_inc(&adapter->running_cap_crqs);
2434 ibmvnic_send_crq(adapter, &crq);
2435
2436 crq.query_capability.capability =
2437 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2438 atomic_inc(&adapter->running_cap_crqs);
2439 ibmvnic_send_crq(adapter, &crq);
2440
2441 crq.query_capability.capability =
2442 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2443 atomic_inc(&adapter->running_cap_crqs);
2444 ibmvnic_send_crq(adapter, &crq);
2445
2446 crq.query_capability.capability =
2447 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2448 atomic_inc(&adapter->running_cap_crqs);
2449 ibmvnic_send_crq(adapter, &crq);
2450
2451 crq.query_capability.capability =
2452 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2453 atomic_inc(&adapter->running_cap_crqs);
2454 ibmvnic_send_crq(adapter, &crq);
2455
2456 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2457 atomic_inc(&adapter->running_cap_crqs);
2458 ibmvnic_send_crq(adapter, &crq);
2459
2460 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2461 atomic_inc(&adapter->running_cap_crqs);
2462 ibmvnic_send_crq(adapter, &crq);
2463
2464 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2465 atomic_inc(&adapter->running_cap_crqs);
2466 ibmvnic_send_crq(adapter, &crq);
2467
2468 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2469 atomic_inc(&adapter->running_cap_crqs);
2470 ibmvnic_send_crq(adapter, &crq);
2471
2472 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2473 atomic_inc(&adapter->running_cap_crqs);
2474 ibmvnic_send_crq(adapter, &crq);
2475
2476 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2477 atomic_inc(&adapter->running_cap_crqs);
2478 ibmvnic_send_crq(adapter, &crq);
2479
2480 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2481 atomic_inc(&adapter->running_cap_crqs);
2482 ibmvnic_send_crq(adapter, &crq);
2483
2484 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2485 atomic_inc(&adapter->running_cap_crqs);
2486 ibmvnic_send_crq(adapter, &crq);
2487
2488 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2489 atomic_inc(&adapter->running_cap_crqs);
2490 ibmvnic_send_crq(adapter, &crq);
2491
2492 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2493 atomic_inc(&adapter->running_cap_crqs);
2494 ibmvnic_send_crq(adapter, &crq);
2495
2496 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2497 atomic_inc(&adapter->running_cap_crqs);
2498 ibmvnic_send_crq(adapter, &crq);
2499
2500 crq.query_capability.capability =
2501 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2502 atomic_inc(&adapter->running_cap_crqs);
2503 ibmvnic_send_crq(adapter, &crq);
2504
2505 crq.query_capability.capability =
2506 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2507 atomic_inc(&adapter->running_cap_crqs);
2508 ibmvnic_send_crq(adapter, &crq);
2509
2510 crq.query_capability.capability =
2511 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2512 atomic_inc(&adapter->running_cap_crqs);
2513 ibmvnic_send_crq(adapter, &crq);
2514
2515 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2516 atomic_inc(&adapter->running_cap_crqs);
2517 ibmvnic_send_crq(adapter, &crq);
2518 }
2519
2520 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2521 {
2522 struct device *dev = &adapter->vdev->dev;
2523 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2524 union ibmvnic_crq crq;
2525 int i;
2526
2527 dma_unmap_single(dev, adapter->ip_offload_tok,
2528 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2529
2530 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2531 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2532 netdev_dbg(adapter->netdev, "%016lx\n",
2533 ((unsigned long int *)(buf))[i]);
2534
2535 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2536 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2537 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2538 buf->tcp_ipv4_chksum);
2539 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2540 buf->tcp_ipv6_chksum);
2541 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2542 buf->udp_ipv4_chksum);
2543 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2544 buf->udp_ipv6_chksum);
2545 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2546 buf->large_tx_ipv4);
2547 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2548 buf->large_tx_ipv6);
2549 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2550 buf->large_rx_ipv4);
2551 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2552 buf->large_rx_ipv6);
2553 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2554 buf->max_ipv4_header_size);
2555 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2556 buf->max_ipv6_header_size);
2557 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2558 buf->max_tcp_header_size);
2559 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2560 buf->max_udp_header_size);
2561 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2562 buf->max_large_tx_size);
2563 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2564 buf->max_large_rx_size);
2565 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2566 buf->ipv6_extension_header);
2567 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2568 buf->tcp_pseudosum_req);
2569 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2570 buf->num_ipv6_ext_headers);
2571 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2572 buf->off_ipv6_ext_headers);
2573
2574 adapter->ip_offload_ctrl_tok =
2575 dma_map_single(dev, &adapter->ip_offload_ctrl,
2576 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2577
2578 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2579 dev_err(dev, "Couldn't map ip offload control buffer\n");
2580 return;
2581 }
2582
2583 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2584 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2585 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2586 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2587 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2588
2589 /* large_tx/rx disabled for now, additional features needed */
2590 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2591 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2592 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2593 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2594
2595 adapter->netdev->features = NETIF_F_GSO;
2596
2597 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2598 adapter->netdev->features |= NETIF_F_IP_CSUM;
2599
2600 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2601 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2602
2603 if ((adapter->netdev->features &
2604 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2605 adapter->netdev->features |= NETIF_F_RXCSUM;
2606
2607 memset(&crq, 0, sizeof(crq));
2608 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2609 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2610 crq.control_ip_offload.len =
2611 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2612 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2613 ibmvnic_send_crq(adapter, &crq);
2614 }
2615
2616 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2617 struct ibmvnic_adapter *adapter)
2618 {
2619 struct device *dev = &adapter->vdev->dev;
2620 struct ibmvnic_error_buff *error_buff, *tmp;
2621 unsigned long flags;
2622 bool found = false;
2623 int i;
2624
2625 if (!crq->request_error_rsp.rc.code) {
2626 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2627 crq->request_error_rsp.rc.code);
2628 return;
2629 }
2630
2631 spin_lock_irqsave(&adapter->error_list_lock, flags);
2632 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2633 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2634 found = true;
2635 list_del(&error_buff->list);
2636 break;
2637 }
2638 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2639
2640 if (!found) {
2641 dev_err(dev, "Couldn't find error id %x\n",
2642 be32_to_cpu(crq->request_error_rsp.error_id));
2643 return;
2644 }
2645
2646 dev_err(dev, "Detailed info for error id %x:",
2647 be32_to_cpu(crq->request_error_rsp.error_id));
2648
2649 for (i = 0; i < error_buff->len; i++) {
2650 pr_cont("%02x", (int)error_buff->buff[i]);
2651 if (i % 8 == 7)
2652 pr_cont(" ");
2653 }
2654 pr_cont("\n");
2655
2656 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2657 DMA_FROM_DEVICE);
2658 kfree(error_buff->buff);
2659 kfree(error_buff);
2660 }
2661
2662 static void request_error_information(struct ibmvnic_adapter *adapter,
2663 union ibmvnic_crq *err_crq)
2664 {
2665 struct device *dev = &adapter->vdev->dev;
2666 struct net_device *netdev = adapter->netdev;
2667 struct ibmvnic_error_buff *error_buff;
2668 unsigned long timeout = msecs_to_jiffies(30000);
2669 union ibmvnic_crq crq;
2670 unsigned long flags;
2671 int rc, detail_len;
2672
2673 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2674 if (!error_buff)
2675 return;
2676
2677 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2678 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2679 if (!error_buff->buff) {
2680 kfree(error_buff);
2681 return;
2682 }
2683
2684 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2685 DMA_FROM_DEVICE);
2686 if (dma_mapping_error(dev, error_buff->dma)) {
2687 netdev_err(netdev, "Couldn't map error buffer\n");
2688 kfree(error_buff->buff);
2689 kfree(error_buff);
2690 return;
2691 }
2692
2693 error_buff->len = detail_len;
2694 error_buff->error_id = err_crq->error_indication.error_id;
2695
2696 spin_lock_irqsave(&adapter->error_list_lock, flags);
2697 list_add_tail(&error_buff->list, &adapter->errors);
2698 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2699
2700 memset(&crq, 0, sizeof(crq));
2701 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2702 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2703 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2704 crq.request_error_info.len = cpu_to_be32(detail_len);
2705 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2706
2707 rc = ibmvnic_send_crq(adapter, &crq);
2708 if (rc) {
2709 netdev_err(netdev, "failed to request error information\n");
2710 goto err_info_fail;
2711 }
2712
2713 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2714 netdev_err(netdev, "timeout waiting for error information\n");
2715 goto err_info_fail;
2716 }
2717
2718 return;
2719
2720 err_info_fail:
2721 spin_lock_irqsave(&adapter->error_list_lock, flags);
2722 list_del(&error_buff->list);
2723 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2724
2725 kfree(error_buff->buff);
2726 kfree(error_buff);
2727 }
2728
2729 static void handle_error_indication(union ibmvnic_crq *crq,
2730 struct ibmvnic_adapter *adapter)
2731 {
2732 struct device *dev = &adapter->vdev->dev;
2733
2734 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2735 crq->error_indication.flags
2736 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2737 be32_to_cpu(crq->error_indication.error_id),
2738 be16_to_cpu(crq->error_indication.error_cause));
2739
2740 if (be32_to_cpu(crq->error_indication.error_id))
2741 request_error_information(adapter, crq);
2742
2743 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2744 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2745 }
2746
2747 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2748 struct ibmvnic_adapter *adapter)
2749 {
2750 struct net_device *netdev = adapter->netdev;
2751 struct device *dev = &adapter->vdev->dev;
2752 long rc;
2753
2754 rc = crq->change_mac_addr_rsp.rc.code;
2755 if (rc) {
2756 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2757 return;
2758 }
2759 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2760 ETH_ALEN);
2761 }
2762
2763 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2764 struct ibmvnic_adapter *adapter)
2765 {
2766 struct device *dev = &adapter->vdev->dev;
2767 u64 *req_value;
2768 char *name;
2769
2770 atomic_dec(&adapter->running_cap_crqs);
2771 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2772 case REQ_TX_QUEUES:
2773 req_value = &adapter->req_tx_queues;
2774 name = "tx";
2775 break;
2776 case REQ_RX_QUEUES:
2777 req_value = &adapter->req_rx_queues;
2778 name = "rx";
2779 break;
2780 case REQ_RX_ADD_QUEUES:
2781 req_value = &adapter->req_rx_add_queues;
2782 name = "rx_add";
2783 break;
2784 case REQ_TX_ENTRIES_PER_SUBCRQ:
2785 req_value = &adapter->req_tx_entries_per_subcrq;
2786 name = "tx_entries_per_subcrq";
2787 break;
2788 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2789 req_value = &adapter->req_rx_add_entries_per_subcrq;
2790 name = "rx_add_entries_per_subcrq";
2791 break;
2792 case REQ_MTU:
2793 req_value = &adapter->req_mtu;
2794 name = "mtu";
2795 break;
2796 case PROMISC_REQUESTED:
2797 req_value = &adapter->promisc;
2798 name = "promisc";
2799 break;
2800 default:
2801 dev_err(dev, "Got invalid cap request rsp %d\n",
2802 crq->request_capability.capability);
2803 return;
2804 }
2805
2806 switch (crq->request_capability_rsp.rc.code) {
2807 case SUCCESS:
2808 break;
2809 case PARTIALSUCCESS:
2810 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2811 *req_value,
2812 (long int)be64_to_cpu(crq->request_capability_rsp.
2813 number), name);
2814 release_sub_crqs(adapter);
2815 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2816 ibmvnic_send_req_caps(adapter, 1);
2817 return;
2818 default:
2819 dev_err(dev, "Error %d in request cap rsp\n",
2820 crq->request_capability_rsp.rc.code);
2821 return;
2822 }
2823
2824 /* Done receiving requested capabilities, query IP offload support */
2825 if (atomic_read(&adapter->running_cap_crqs) == 0) {
2826 union ibmvnic_crq newcrq;
2827 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2828 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2829 &adapter->ip_offload_buf;
2830
2831 adapter->wait_capability = false;
2832 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2833 buf_sz,
2834 DMA_FROM_DEVICE);
2835
2836 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2837 if (!firmware_has_feature(FW_FEATURE_CMO))
2838 dev_err(dev, "Couldn't map offload buffer\n");
2839 return;
2840 }
2841
2842 memset(&newcrq, 0, sizeof(newcrq));
2843 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2844 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2845 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2846 newcrq.query_ip_offload.ioba =
2847 cpu_to_be32(adapter->ip_offload_tok);
2848
2849 ibmvnic_send_crq(adapter, &newcrq);
2850 }
2851 }
2852
2853 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2854 struct ibmvnic_adapter *adapter)
2855 {
2856 struct device *dev = &adapter->vdev->dev;
2857 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2858 struct ibmvnic_login_buffer *login = adapter->login_buf;
2859 int i;
2860
2861 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2862 DMA_BIDIRECTIONAL);
2863 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2864 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2865
2866 /* If the number of queues requested can't be allocated by the
2867 * server, the login response will return with code 1. We will need
2868 * to resend the login buffer with fewer queues requested.
2869 */
2870 if (login_rsp_crq->generic.rc.code) {
2871 adapter->renegotiate = true;
2872 complete(&adapter->init_done);
2873 return 0;
2874 }
2875
2876 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2877 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2878 netdev_dbg(adapter->netdev, "%016lx\n",
2879 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2880 }
2881
2882 /* Sanity checks */
2883 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2884 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2885 adapter->req_rx_add_queues !=
2886 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2887 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2888 ibmvnic_remove(adapter->vdev);
2889 return -EIO;
2890 }
2891 complete(&adapter->init_done);
2892
2893 return 0;
2894 }
2895
2896 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2897 struct ibmvnic_adapter *adapter)
2898 {
2899 struct device *dev = &adapter->vdev->dev;
2900 u8 map_id = crq->request_map_rsp.map_id;
2901 int tx_subcrqs;
2902 int rx_subcrqs;
2903 long rc;
2904 int i;
2905
2906 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2907 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2908
2909 rc = crq->request_map_rsp.rc.code;
2910 if (rc) {
2911 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2912 adapter->map_id--;
2913 /* need to find and zero tx/rx_pool map_id */
2914 for (i = 0; i < tx_subcrqs; i++) {
2915 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2916 adapter->tx_pool[i].long_term_buff.map_id = 0;
2917 }
2918 for (i = 0; i < rx_subcrqs; i++) {
2919 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2920 adapter->rx_pool[i].long_term_buff.map_id = 0;
2921 }
2922 }
2923 complete(&adapter->fw_done);
2924 }
2925
2926 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2927 struct ibmvnic_adapter *adapter)
2928 {
2929 struct device *dev = &adapter->vdev->dev;
2930 long rc;
2931
2932 rc = crq->request_unmap_rsp.rc.code;
2933 if (rc)
2934 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2935 }
2936
2937 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2938 struct ibmvnic_adapter *adapter)
2939 {
2940 struct net_device *netdev = adapter->netdev;
2941 struct device *dev = &adapter->vdev->dev;
2942 long rc;
2943
2944 rc = crq->query_map_rsp.rc.code;
2945 if (rc) {
2946 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2947 return;
2948 }
2949 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2950 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2951 crq->query_map_rsp.free_pages);
2952 }
2953
2954 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2955 struct ibmvnic_adapter *adapter)
2956 {
2957 struct net_device *netdev = adapter->netdev;
2958 struct device *dev = &adapter->vdev->dev;
2959 long rc;
2960
2961 atomic_dec(&adapter->running_cap_crqs);
2962 netdev_dbg(netdev, "Outstanding queries: %d\n",
2963 atomic_read(&adapter->running_cap_crqs));
2964 rc = crq->query_capability.rc.code;
2965 if (rc) {
2966 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2967 goto out;
2968 }
2969
2970 switch (be16_to_cpu(crq->query_capability.capability)) {
2971 case MIN_TX_QUEUES:
2972 adapter->min_tx_queues =
2973 be64_to_cpu(crq->query_capability.number);
2974 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2975 adapter->min_tx_queues);
2976 break;
2977 case MIN_RX_QUEUES:
2978 adapter->min_rx_queues =
2979 be64_to_cpu(crq->query_capability.number);
2980 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2981 adapter->min_rx_queues);
2982 break;
2983 case MIN_RX_ADD_QUEUES:
2984 adapter->min_rx_add_queues =
2985 be64_to_cpu(crq->query_capability.number);
2986 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2987 adapter->min_rx_add_queues);
2988 break;
2989 case MAX_TX_QUEUES:
2990 adapter->max_tx_queues =
2991 be64_to_cpu(crq->query_capability.number);
2992 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2993 adapter->max_tx_queues);
2994 break;
2995 case MAX_RX_QUEUES:
2996 adapter->max_rx_queues =
2997 be64_to_cpu(crq->query_capability.number);
2998 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2999 adapter->max_rx_queues);
3000 break;
3001 case MAX_RX_ADD_QUEUES:
3002 adapter->max_rx_add_queues =
3003 be64_to_cpu(crq->query_capability.number);
3004 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3005 adapter->max_rx_add_queues);
3006 break;
3007 case MIN_TX_ENTRIES_PER_SUBCRQ:
3008 adapter->min_tx_entries_per_subcrq =
3009 be64_to_cpu(crq->query_capability.number);
3010 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3011 adapter->min_tx_entries_per_subcrq);
3012 break;
3013 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3014 adapter->min_rx_add_entries_per_subcrq =
3015 be64_to_cpu(crq->query_capability.number);
3016 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3017 adapter->min_rx_add_entries_per_subcrq);
3018 break;
3019 case MAX_TX_ENTRIES_PER_SUBCRQ:
3020 adapter->max_tx_entries_per_subcrq =
3021 be64_to_cpu(crq->query_capability.number);
3022 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3023 adapter->max_tx_entries_per_subcrq);
3024 break;
3025 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3026 adapter->max_rx_add_entries_per_subcrq =
3027 be64_to_cpu(crq->query_capability.number);
3028 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3029 adapter->max_rx_add_entries_per_subcrq);
3030 break;
3031 case TCP_IP_OFFLOAD:
3032 adapter->tcp_ip_offload =
3033 be64_to_cpu(crq->query_capability.number);
3034 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3035 adapter->tcp_ip_offload);
3036 break;
3037 case PROMISC_SUPPORTED:
3038 adapter->promisc_supported =
3039 be64_to_cpu(crq->query_capability.number);
3040 netdev_dbg(netdev, "promisc_supported = %lld\n",
3041 adapter->promisc_supported);
3042 break;
3043 case MIN_MTU:
3044 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3045 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3046 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3047 break;
3048 case MAX_MTU:
3049 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3050 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3051 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3052 break;
3053 case MAX_MULTICAST_FILTERS:
3054 adapter->max_multicast_filters =
3055 be64_to_cpu(crq->query_capability.number);
3056 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3057 adapter->max_multicast_filters);
3058 break;
3059 case VLAN_HEADER_INSERTION:
3060 adapter->vlan_header_insertion =
3061 be64_to_cpu(crq->query_capability.number);
3062 if (adapter->vlan_header_insertion)
3063 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3064 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3065 adapter->vlan_header_insertion);
3066 break;
3067 case RX_VLAN_HEADER_INSERTION:
3068 adapter->rx_vlan_header_insertion =
3069 be64_to_cpu(crq->query_capability.number);
3070 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3071 adapter->rx_vlan_header_insertion);
3072 break;
3073 case MAX_TX_SG_ENTRIES:
3074 adapter->max_tx_sg_entries =
3075 be64_to_cpu(crq->query_capability.number);
3076 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3077 adapter->max_tx_sg_entries);
3078 break;
3079 case RX_SG_SUPPORTED:
3080 adapter->rx_sg_supported =
3081 be64_to_cpu(crq->query_capability.number);
3082 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3083 adapter->rx_sg_supported);
3084 break;
3085 case OPT_TX_COMP_SUB_QUEUES:
3086 adapter->opt_tx_comp_sub_queues =
3087 be64_to_cpu(crq->query_capability.number);
3088 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3089 adapter->opt_tx_comp_sub_queues);
3090 break;
3091 case OPT_RX_COMP_QUEUES:
3092 adapter->opt_rx_comp_queues =
3093 be64_to_cpu(crq->query_capability.number);
3094 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3095 adapter->opt_rx_comp_queues);
3096 break;
3097 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3098 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3099 be64_to_cpu(crq->query_capability.number);
3100 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3101 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3102 break;
3103 case OPT_TX_ENTRIES_PER_SUBCRQ:
3104 adapter->opt_tx_entries_per_subcrq =
3105 be64_to_cpu(crq->query_capability.number);
3106 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3107 adapter->opt_tx_entries_per_subcrq);
3108 break;
3109 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3110 adapter->opt_rxba_entries_per_subcrq =
3111 be64_to_cpu(crq->query_capability.number);
3112 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3113 adapter->opt_rxba_entries_per_subcrq);
3114 break;
3115 case TX_RX_DESC_REQ:
3116 adapter->tx_rx_desc_req = crq->query_capability.number;
3117 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3118 adapter->tx_rx_desc_req);
3119 break;
3120
3121 default:
3122 netdev_err(netdev, "Got invalid cap rsp %d\n",
3123 crq->query_capability.capability);
3124 }
3125
3126 out:
3127 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3128 adapter->wait_capability = false;
3129 ibmvnic_send_req_caps(adapter, 0);
3130 }
3131 }
3132
3133 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3134 struct ibmvnic_adapter *adapter)
3135 {
3136 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3137 struct net_device *netdev = adapter->netdev;
3138 struct device *dev = &adapter->vdev->dev;
3139 u64 *u64_crq = (u64 *)crq;
3140 long rc;
3141
3142 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3143 (unsigned long int)cpu_to_be64(u64_crq[0]),
3144 (unsigned long int)cpu_to_be64(u64_crq[1]));
3145 switch (gen_crq->first) {
3146 case IBMVNIC_CRQ_INIT_RSP:
3147 switch (gen_crq->cmd) {
3148 case IBMVNIC_CRQ_INIT:
3149 dev_info(dev, "Partner initialized\n");
3150 break;
3151 case IBMVNIC_CRQ_INIT_COMPLETE:
3152 dev_info(dev, "Partner initialization complete\n");
3153 send_version_xchg(adapter);
3154 break;
3155 default:
3156 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3157 }
3158 return;
3159 case IBMVNIC_CRQ_XPORT_EVENT:
3160 netif_carrier_off(netdev);
3161 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3162 dev_info(dev, "Migrated, re-enabling adapter\n");
3163 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3164 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3165 dev_info(dev, "Backing device failover detected\n");
3166 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3167 } else {
3168 /* The adapter lost the connection */
3169 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3170 gen_crq->cmd);
3171 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3172 }
3173 return;
3174 case IBMVNIC_CRQ_CMD_RSP:
3175 break;
3176 default:
3177 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3178 gen_crq->first);
3179 return;
3180 }
3181
3182 switch (gen_crq->cmd) {
3183 case VERSION_EXCHANGE_RSP:
3184 rc = crq->version_exchange_rsp.rc.code;
3185 if (rc) {
3186 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3187 break;
3188 }
3189 dev_info(dev, "Partner protocol version is %d\n",
3190 crq->version_exchange_rsp.version);
3191 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3192 ibmvnic_version)
3193 ibmvnic_version =
3194 be16_to_cpu(crq->version_exchange_rsp.version);
3195 send_cap_queries(adapter);
3196 break;
3197 case QUERY_CAPABILITY_RSP:
3198 handle_query_cap_rsp(crq, adapter);
3199 break;
3200 case QUERY_MAP_RSP:
3201 handle_query_map_rsp(crq, adapter);
3202 break;
3203 case REQUEST_MAP_RSP:
3204 handle_request_map_rsp(crq, adapter);
3205 break;
3206 case REQUEST_UNMAP_RSP:
3207 handle_request_unmap_rsp(crq, adapter);
3208 break;
3209 case REQUEST_CAPABILITY_RSP:
3210 handle_request_cap_rsp(crq, adapter);
3211 break;
3212 case LOGIN_RSP:
3213 netdev_dbg(netdev, "Got Login Response\n");
3214 handle_login_rsp(crq, adapter);
3215 break;
3216 case LOGICAL_LINK_STATE_RSP:
3217 netdev_dbg(netdev,
3218 "Got Logical Link State Response, state: %d rc: %d\n",
3219 crq->logical_link_state_rsp.link_state,
3220 crq->logical_link_state_rsp.rc.code);
3221 adapter->logical_link_state =
3222 crq->logical_link_state_rsp.link_state;
3223 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3224 complete(&adapter->init_done);
3225 break;
3226 case LINK_STATE_INDICATION:
3227 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3228 adapter->phys_link_state =
3229 crq->link_state_indication.phys_link_state;
3230 adapter->logical_link_state =
3231 crq->link_state_indication.logical_link_state;
3232 break;
3233 case CHANGE_MAC_ADDR_RSP:
3234 netdev_dbg(netdev, "Got MAC address change Response\n");
3235 handle_change_mac_rsp(crq, adapter);
3236 break;
3237 case ERROR_INDICATION:
3238 netdev_dbg(netdev, "Got Error Indication\n");
3239 handle_error_indication(crq, adapter);
3240 break;
3241 case REQUEST_ERROR_RSP:
3242 netdev_dbg(netdev, "Got Error Detail Response\n");
3243 handle_error_info_rsp(crq, adapter);
3244 break;
3245 case REQUEST_STATISTICS_RSP:
3246 netdev_dbg(netdev, "Got Statistics Response\n");
3247 complete(&adapter->stats_done);
3248 break;
3249 case QUERY_IP_OFFLOAD_RSP:
3250 netdev_dbg(netdev, "Got Query IP offload Response\n");
3251 handle_query_ip_offload_rsp(adapter);
3252 break;
3253 case MULTICAST_CTRL_RSP:
3254 netdev_dbg(netdev, "Got multicast control Response\n");
3255 break;
3256 case CONTROL_IP_OFFLOAD_RSP:
3257 netdev_dbg(netdev, "Got Control IP offload Response\n");
3258 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3259 sizeof(adapter->ip_offload_ctrl),
3260 DMA_TO_DEVICE);
3261 complete(&adapter->init_done);
3262 break;
3263 case COLLECT_FW_TRACE_RSP:
3264 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3265 complete(&adapter->fw_done);
3266 break;
3267 default:
3268 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3269 gen_crq->cmd);
3270 }
3271 }
3272
3273 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3274 {
3275 struct ibmvnic_adapter *adapter = instance;
3276
3277 tasklet_schedule(&adapter->tasklet);
3278 return IRQ_HANDLED;
3279 }
3280
3281 static void ibmvnic_tasklet(void *data)
3282 {
3283 struct ibmvnic_adapter *adapter = data;
3284 struct ibmvnic_crq_queue *queue = &adapter->crq;
3285 union ibmvnic_crq *crq;
3286 unsigned long flags;
3287 bool done = false;
3288
3289 spin_lock_irqsave(&queue->lock, flags);
3290 while (!done) {
3291 /* Pull all the valid messages off the CRQ */
3292 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3293 ibmvnic_handle_crq(crq, adapter);
3294 crq->generic.first = 0;
3295 }
3296
3297 /* remain in tasklet until all
3298 * capabilities responses are received
3299 */
3300 if (!adapter->wait_capability)
3301 done = true;
3302 }
3303 /* if capabilities CRQ's were sent in this tasklet, the following
3304 * tasklet must wait until all responses are received
3305 */
3306 if (atomic_read(&adapter->running_cap_crqs) != 0)
3307 adapter->wait_capability = true;
3308 spin_unlock_irqrestore(&queue->lock, flags);
3309 }
3310
3311 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3312 {
3313 struct vio_dev *vdev = adapter->vdev;
3314 int rc;
3315
3316 do {
3317 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3318 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3319
3320 if (rc)
3321 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3322
3323 return rc;
3324 }
3325
3326 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3327 {
3328 struct ibmvnic_crq_queue *crq = &adapter->crq;
3329 struct device *dev = &adapter->vdev->dev;
3330 struct vio_dev *vdev = adapter->vdev;
3331 int rc;
3332
3333 /* Close the CRQ */
3334 do {
3335 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3336 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3337
3338 /* Clean out the queue */
3339 memset(crq->msgs, 0, PAGE_SIZE);
3340 crq->cur = 0;
3341
3342 /* And re-open it again */
3343 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3344 crq->msg_token, PAGE_SIZE);
3345
3346 if (rc == H_CLOSED)
3347 /* Adapter is good, but other end is not ready */
3348 dev_warn(dev, "Partner adapter not ready\n");
3349 else if (rc != 0)
3350 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3351
3352 return rc;
3353 }
3354
3355 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3356 {
3357 struct ibmvnic_crq_queue *crq = &adapter->crq;
3358 struct vio_dev *vdev = adapter->vdev;
3359 long rc;
3360
3361 if (!crq->msgs)
3362 return;
3363
3364 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3365 free_irq(vdev->irq, adapter);
3366 tasklet_kill(&adapter->tasklet);
3367 do {
3368 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3369 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3370
3371 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3372 DMA_BIDIRECTIONAL);
3373 free_page((unsigned long)crq->msgs);
3374 crq->msgs = NULL;
3375 }
3376
3377 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3378 {
3379 struct ibmvnic_crq_queue *crq = &adapter->crq;
3380 struct device *dev = &adapter->vdev->dev;
3381 struct vio_dev *vdev = adapter->vdev;
3382 int rc, retrc = -ENOMEM;
3383
3384 if (crq->msgs)
3385 return 0;
3386
3387 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3388 /* Should we allocate more than one page? */
3389
3390 if (!crq->msgs)
3391 return -ENOMEM;
3392
3393 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3394 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3395 DMA_BIDIRECTIONAL);
3396 if (dma_mapping_error(dev, crq->msg_token))
3397 goto map_failed;
3398
3399 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3400 crq->msg_token, PAGE_SIZE);
3401
3402 if (rc == H_RESOURCE)
3403 /* maybe kexecing and resource is busy. try a reset */
3404 rc = ibmvnic_reset_crq(adapter);
3405 retrc = rc;
3406
3407 if (rc == H_CLOSED) {
3408 dev_warn(dev, "Partner adapter not ready\n");
3409 } else if (rc) {
3410 dev_warn(dev, "Error %d opening adapter\n", rc);
3411 goto reg_crq_failed;
3412 }
3413
3414 retrc = 0;
3415
3416 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3417 (unsigned long)adapter);
3418
3419 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3420 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3421 adapter);
3422 if (rc) {
3423 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3424 vdev->irq, rc);
3425 goto req_irq_failed;
3426 }
3427
3428 rc = vio_enable_interrupts(vdev);
3429 if (rc) {
3430 dev_err(dev, "Error %d enabling interrupts\n", rc);
3431 goto req_irq_failed;
3432 }
3433
3434 crq->cur = 0;
3435 spin_lock_init(&crq->lock);
3436
3437 return retrc;
3438
3439 req_irq_failed:
3440 tasklet_kill(&adapter->tasklet);
3441 do {
3442 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3443 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3444 reg_crq_failed:
3445 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3446 map_failed:
3447 free_page((unsigned long)crq->msgs);
3448 crq->msgs = NULL;
3449 return retrc;
3450 }
3451
3452 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3453 {
3454 struct device *dev = &adapter->vdev->dev;
3455 unsigned long timeout = msecs_to_jiffies(30000);
3456 int rc;
3457
3458 rc = init_crq_queue(adapter);
3459 if (rc) {
3460 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3461 return rc;
3462 }
3463
3464 init_completion(&adapter->init_done);
3465 ibmvnic_send_crq_init(adapter);
3466 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3467 dev_err(dev, "Initialization sequence timed out\n");
3468 release_crq_queue(adapter);
3469 return -1;
3470 }
3471
3472 rc = init_sub_crqs(adapter);
3473 if (rc) {
3474 dev_err(dev, "Initialization of sub crqs failed\n");
3475 release_crq_queue(adapter);
3476 }
3477
3478 return rc;
3479 }
3480
3481 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3482 {
3483 struct ibmvnic_adapter *adapter;
3484 struct net_device *netdev;
3485 unsigned char *mac_addr_p;
3486 int rc;
3487
3488 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3489 dev->unit_address);
3490
3491 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3492 VETH_MAC_ADDR, NULL);
3493 if (!mac_addr_p) {
3494 dev_err(&dev->dev,
3495 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3496 __FILE__, __LINE__);
3497 return 0;
3498 }
3499
3500 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3501 IBMVNIC_MAX_TX_QUEUES);
3502 if (!netdev)
3503 return -ENOMEM;
3504
3505 adapter = netdev_priv(netdev);
3506 adapter->state = VNIC_PROBING;
3507 dev_set_drvdata(&dev->dev, netdev);
3508 adapter->vdev = dev;
3509 adapter->netdev = netdev;
3510
3511 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3512 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3513 netdev->irq = dev->irq;
3514 netdev->netdev_ops = &ibmvnic_netdev_ops;
3515 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3516 SET_NETDEV_DEV(netdev, &dev->dev);
3517
3518 spin_lock_init(&adapter->stats_lock);
3519
3520 INIT_LIST_HEAD(&adapter->errors);
3521 spin_lock_init(&adapter->error_list_lock);
3522
3523 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3524 INIT_LIST_HEAD(&adapter->rwi_list);
3525 mutex_init(&adapter->reset_lock);
3526 mutex_init(&adapter->rwi_lock);
3527 adapter->resetting = false;
3528
3529 rc = ibmvnic_init(adapter);
3530 if (rc) {
3531 free_netdev(netdev);
3532 return rc;
3533 }
3534
3535 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3536
3537 rc = register_netdev(netdev);
3538 if (rc) {
3539 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3540 free_netdev(netdev);
3541 return rc;
3542 }
3543 dev_info(&dev->dev, "ibmvnic registered\n");
3544
3545 adapter->state = VNIC_PROBED;
3546 return 0;
3547 }
3548
3549 static int ibmvnic_remove(struct vio_dev *dev)
3550 {
3551 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3552 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3553
3554 adapter->state = VNIC_REMOVING;
3555 unregister_netdev(netdev);
3556 mutex_lock(&adapter->reset_lock);
3557
3558 release_resources(adapter);
3559 release_sub_crqs(adapter);
3560 release_crq_queue(adapter);
3561
3562 adapter->state = VNIC_REMOVED;
3563
3564 mutex_unlock(&adapter->reset_lock);
3565 free_netdev(netdev);
3566 dev_set_drvdata(&dev->dev, NULL);
3567
3568 return 0;
3569 }
3570
3571 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3572 {
3573 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3574 struct ibmvnic_adapter *adapter;
3575 struct iommu_table *tbl;
3576 unsigned long ret = 0;
3577 int i;
3578
3579 tbl = get_iommu_table_base(&vdev->dev);
3580
3581 /* netdev inits at probe time along with the structures we need below*/
3582 if (!netdev)
3583 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3584
3585 adapter = netdev_priv(netdev);
3586
3587 ret += PAGE_SIZE; /* the crq message queue */
3588 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3589
3590 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3591 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3592
3593 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3594 i++)
3595 ret += adapter->rx_pool[i].size *
3596 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3597
3598 return ret;
3599 }
3600
3601 static int ibmvnic_resume(struct device *dev)
3602 {
3603 struct net_device *netdev = dev_get_drvdata(dev);
3604 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3605 int i;
3606
3607 /* kick the interrupt handlers just in case we lost an interrupt */
3608 for (i = 0; i < adapter->req_rx_queues; i++)
3609 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3610 adapter->rx_scrq[i]);
3611
3612 return 0;
3613 }
3614
3615 static struct vio_device_id ibmvnic_device_table[] = {
3616 {"network", "IBM,vnic"},
3617 {"", "" }
3618 };
3619 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3620
3621 static const struct dev_pm_ops ibmvnic_pm_ops = {
3622 .resume = ibmvnic_resume
3623 };
3624
3625 static struct vio_driver ibmvnic_driver = {
3626 .id_table = ibmvnic_device_table,
3627 .probe = ibmvnic_probe,
3628 .remove = ibmvnic_remove,
3629 .get_desired_dma = ibmvnic_get_desired_dma,
3630 .name = ibmvnic_driver_name,
3631 .pm = &ibmvnic_pm_ops,
3632 };
3633
3634 /* module functions */
3635 static int __init ibmvnic_module_init(void)
3636 {
3637 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3638 IBMVNIC_DRIVER_VERSION);
3639
3640 return vio_register_driver(&ibmvnic_driver);
3641 }
3642
3643 static void __exit ibmvnic_module_exit(void)
3644 {
3645 vio_unregister_driver(&ibmvnic_driver);
3646 }
3647
3648 module_init(ibmvnic_module_init);
3649 module_exit(ibmvnic_module_exit);
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