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Merge tag 'gcc-plugins-v4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/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");
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
187 if (adapter->fw_done_rc) {
188 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
189 adapter->fw_done_rc);
190 return -1;
191 }
192 return 0;
193 }
194
195 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
196 struct ibmvnic_long_term_buff *ltb)
197 {
198 struct device *dev = &adapter->vdev->dev;
199
200 if (!ltb->buff)
201 return;
202
203 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
204 adapter->reset_reason != VNIC_RESET_MOBILITY)
205 send_request_unmap(adapter, ltb->map_id);
206 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
207 }
208
209 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
210 struct ibmvnic_long_term_buff *ltb)
211 {
212 memset(ltb->buff, 0, ltb->size);
213
214 init_completion(&adapter->fw_done);
215 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
216 wait_for_completion(&adapter->fw_done);
217
218 if (adapter->fw_done_rc) {
219 dev_info(&adapter->vdev->dev,
220 "Reset failed, attempting to free and reallocate buffer\n");
221 free_long_term_buff(adapter, ltb);
222 return alloc_long_term_buff(adapter, ltb, ltb->size);
223 }
224 return 0;
225 }
226
227 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
228 {
229 int i;
230
231 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
232 i++)
233 adapter->rx_pool[i].active = 0;
234 }
235
236 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
237 struct ibmvnic_rx_pool *pool)
238 {
239 int count = pool->size - atomic_read(&pool->available);
240 struct device *dev = &adapter->vdev->dev;
241 int buffers_added = 0;
242 unsigned long lpar_rc;
243 union sub_crq sub_crq;
244 struct sk_buff *skb;
245 unsigned int offset;
246 dma_addr_t dma_addr;
247 unsigned char *dst;
248 u64 *handle_array;
249 int shift = 0;
250 int index;
251 int i;
252
253 if (!pool->active)
254 return;
255
256 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
257 be32_to_cpu(adapter->login_rsp_buf->
258 off_rxadd_subcrqs));
259
260 for (i = 0; i < count; ++i) {
261 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
262 if (!skb) {
263 dev_err(dev, "Couldn't replenish rx buff\n");
264 adapter->replenish_no_mem++;
265 break;
266 }
267
268 index = pool->free_map[pool->next_free];
269
270 if (pool->rx_buff[index].skb)
271 dev_err(dev, "Inconsistent free_map!\n");
272
273 /* Copy the skb to the long term mapped DMA buffer */
274 offset = index * pool->buff_size;
275 dst = pool->long_term_buff.buff + offset;
276 memset(dst, 0, pool->buff_size);
277 dma_addr = pool->long_term_buff.addr + offset;
278 pool->rx_buff[index].data = dst;
279
280 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
281 pool->rx_buff[index].dma = dma_addr;
282 pool->rx_buff[index].skb = skb;
283 pool->rx_buff[index].pool_index = pool->index;
284 pool->rx_buff[index].size = pool->buff_size;
285
286 memset(&sub_crq, 0, sizeof(sub_crq));
287 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
288 sub_crq.rx_add.correlator =
289 cpu_to_be64((u64)&pool->rx_buff[index]);
290 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
291 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
292
293 /* The length field of the sCRQ is defined to be 24 bits so the
294 * buffer size needs to be left shifted by a byte before it is
295 * converted to big endian to prevent the last byte from being
296 * truncated.
297 */
298 #ifdef __LITTLE_ENDIAN__
299 shift = 8;
300 #endif
301 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
302
303 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
304 &sub_crq);
305 if (lpar_rc != H_SUCCESS)
306 goto failure;
307
308 buffers_added++;
309 adapter->replenish_add_buff_success++;
310 pool->next_free = (pool->next_free + 1) % pool->size;
311 }
312 atomic_add(buffers_added, &pool->available);
313 return;
314
315 failure:
316 dev_info(dev, "replenish pools failure\n");
317 pool->free_map[pool->next_free] = index;
318 pool->rx_buff[index].skb = NULL;
319 if (!dma_mapping_error(dev, dma_addr))
320 dma_unmap_single(dev, dma_addr, pool->buff_size,
321 DMA_FROM_DEVICE);
322
323 dev_kfree_skb_any(skb);
324 adapter->replenish_add_buff_failure++;
325 atomic_add(buffers_added, &pool->available);
326
327 if (lpar_rc == H_CLOSED) {
328 /* Disable buffer pool replenishment and report carrier off if
329 * queue is closed. Firmware guarantees that a signal will
330 * be sent to the driver, triggering a reset.
331 */
332 deactivate_rx_pools(adapter);
333 netif_carrier_off(adapter->netdev);
334 }
335 }
336
337 static void replenish_pools(struct ibmvnic_adapter *adapter)
338 {
339 int i;
340
341 adapter->replenish_task_cycles++;
342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
343 i++) {
344 if (adapter->rx_pool[i].active)
345 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
346 }
347 }
348
349 static void release_stats_token(struct ibmvnic_adapter *adapter)
350 {
351 struct device *dev = &adapter->vdev->dev;
352
353 if (!adapter->stats_token)
354 return;
355
356 dma_unmap_single(dev, adapter->stats_token,
357 sizeof(struct ibmvnic_statistics),
358 DMA_FROM_DEVICE);
359 adapter->stats_token = 0;
360 }
361
362 static int init_stats_token(struct ibmvnic_adapter *adapter)
363 {
364 struct device *dev = &adapter->vdev->dev;
365 dma_addr_t stok;
366
367 stok = dma_map_single(dev, &adapter->stats,
368 sizeof(struct ibmvnic_statistics),
369 DMA_FROM_DEVICE);
370 if (dma_mapping_error(dev, stok)) {
371 dev_err(dev, "Couldn't map stats buffer\n");
372 return -1;
373 }
374
375 adapter->stats_token = stok;
376 return 0;
377 }
378
379 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
380 {
381 struct ibmvnic_rx_pool *rx_pool;
382 int rx_scrqs;
383 int i, j, rc;
384
385 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
386 for (i = 0; i < rx_scrqs; i++) {
387 rx_pool = &adapter->rx_pool[i];
388
389 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
390 if (rc)
391 return rc;
392
393 for (j = 0; j < rx_pool->size; j++)
394 rx_pool->free_map[j] = j;
395
396 memset(rx_pool->rx_buff, 0,
397 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
398
399 atomic_set(&rx_pool->available, 0);
400 rx_pool->next_alloc = 0;
401 rx_pool->next_free = 0;
402 rx_pool->active = 1;
403 }
404
405 return 0;
406 }
407
408 static void release_rx_pools(struct ibmvnic_adapter *adapter)
409 {
410 struct ibmvnic_rx_pool *rx_pool;
411 int rx_scrqs;
412 int i, j;
413
414 if (!adapter->rx_pool)
415 return;
416
417 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
418 for (i = 0; i < rx_scrqs; i++) {
419 rx_pool = &adapter->rx_pool[i];
420
421 kfree(rx_pool->free_map);
422 free_long_term_buff(adapter, &rx_pool->long_term_buff);
423
424 if (!rx_pool->rx_buff)
425 continue;
426
427 for (j = 0; j < rx_pool->size; j++) {
428 if (rx_pool->rx_buff[j].skb) {
429 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
430 rx_pool->rx_buff[i].skb = NULL;
431 }
432 }
433
434 kfree(rx_pool->rx_buff);
435 }
436
437 kfree(adapter->rx_pool);
438 adapter->rx_pool = NULL;
439 }
440
441 static int init_rx_pools(struct net_device *netdev)
442 {
443 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
444 struct device *dev = &adapter->vdev->dev;
445 struct ibmvnic_rx_pool *rx_pool;
446 int rxadd_subcrqs;
447 u64 *size_array;
448 int i, j;
449
450 rxadd_subcrqs =
451 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
452 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
453 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
454
455 adapter->rx_pool = kcalloc(rxadd_subcrqs,
456 sizeof(struct ibmvnic_rx_pool),
457 GFP_KERNEL);
458 if (!adapter->rx_pool) {
459 dev_err(dev, "Failed to allocate rx pools\n");
460 return -1;
461 }
462
463 for (i = 0; i < rxadd_subcrqs; i++) {
464 rx_pool = &adapter->rx_pool[i];
465
466 netdev_dbg(adapter->netdev,
467 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
468 i, adapter->req_rx_add_entries_per_subcrq,
469 be64_to_cpu(size_array[i]));
470
471 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
472 rx_pool->index = i;
473 rx_pool->buff_size = be64_to_cpu(size_array[i]);
474 rx_pool->active = 1;
475
476 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
477 GFP_KERNEL);
478 if (!rx_pool->free_map) {
479 release_rx_pools(adapter);
480 return -1;
481 }
482
483 rx_pool->rx_buff = kcalloc(rx_pool->size,
484 sizeof(struct ibmvnic_rx_buff),
485 GFP_KERNEL);
486 if (!rx_pool->rx_buff) {
487 dev_err(dev, "Couldn't alloc rx buffers\n");
488 release_rx_pools(adapter);
489 return -1;
490 }
491
492 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
493 rx_pool->size * rx_pool->buff_size)) {
494 release_rx_pools(adapter);
495 return -1;
496 }
497
498 for (j = 0; j < rx_pool->size; ++j)
499 rx_pool->free_map[j] = j;
500
501 atomic_set(&rx_pool->available, 0);
502 rx_pool->next_alloc = 0;
503 rx_pool->next_free = 0;
504 }
505
506 return 0;
507 }
508
509 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
510 {
511 struct ibmvnic_tx_pool *tx_pool;
512 int tx_scrqs;
513 int i, j, rc;
514
515 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
516 for (i = 0; i < tx_scrqs; i++) {
517 tx_pool = &adapter->tx_pool[i];
518
519 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
520 if (rc)
521 return rc;
522
523 memset(tx_pool->tx_buff, 0,
524 adapter->req_tx_entries_per_subcrq *
525 sizeof(struct ibmvnic_tx_buff));
526
527 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
528 tx_pool->free_map[j] = j;
529
530 tx_pool->consumer_index = 0;
531 tx_pool->producer_index = 0;
532 }
533
534 return 0;
535 }
536
537 static void release_tx_pools(struct ibmvnic_adapter *adapter)
538 {
539 struct ibmvnic_tx_pool *tx_pool;
540 int i, tx_scrqs;
541
542 if (!adapter->tx_pool)
543 return;
544
545 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
546 for (i = 0; i < tx_scrqs; i++) {
547 tx_pool = &adapter->tx_pool[i];
548 kfree(tx_pool->tx_buff);
549 free_long_term_buff(adapter, &tx_pool->long_term_buff);
550 kfree(tx_pool->free_map);
551 }
552
553 kfree(adapter->tx_pool);
554 adapter->tx_pool = NULL;
555 }
556
557 static int init_tx_pools(struct net_device *netdev)
558 {
559 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
560 struct device *dev = &adapter->vdev->dev;
561 struct ibmvnic_tx_pool *tx_pool;
562 int tx_subcrqs;
563 int i, j;
564
565 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
566 adapter->tx_pool = kcalloc(tx_subcrqs,
567 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
568 if (!adapter->tx_pool)
569 return -1;
570
571 for (i = 0; i < tx_subcrqs; i++) {
572 tx_pool = &adapter->tx_pool[i];
573 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
574 sizeof(struct ibmvnic_tx_buff),
575 GFP_KERNEL);
576 if (!tx_pool->tx_buff) {
577 dev_err(dev, "tx pool buffer allocation failed\n");
578 release_tx_pools(adapter);
579 return -1;
580 }
581
582 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
583 adapter->req_tx_entries_per_subcrq *
584 adapter->req_mtu)) {
585 release_tx_pools(adapter);
586 return -1;
587 }
588
589 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
590 sizeof(int), GFP_KERNEL);
591 if (!tx_pool->free_map) {
592 release_tx_pools(adapter);
593 return -1;
594 }
595
596 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
597 tx_pool->free_map[j] = j;
598
599 tx_pool->consumer_index = 0;
600 tx_pool->producer_index = 0;
601 }
602
603 return 0;
604 }
605
606 static void release_error_buffers(struct ibmvnic_adapter *adapter)
607 {
608 struct device *dev = &adapter->vdev->dev;
609 struct ibmvnic_error_buff *error_buff, *tmp;
610 unsigned long flags;
611
612 spin_lock_irqsave(&adapter->error_list_lock, flags);
613 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
614 list_del(&error_buff->list);
615 dma_unmap_single(dev, error_buff->dma, error_buff->len,
616 DMA_FROM_DEVICE);
617 kfree(error_buff->buff);
618 kfree(error_buff);
619 }
620 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
621 }
622
623 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
624 {
625 int i;
626
627 if (adapter->napi_enabled)
628 return;
629
630 for (i = 0; i < adapter->req_rx_queues; i++)
631 napi_enable(&adapter->napi[i]);
632
633 adapter->napi_enabled = true;
634 }
635
636 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
637 {
638 int i;
639
640 if (!adapter->napi_enabled)
641 return;
642
643 for (i = 0; i < adapter->req_rx_queues; i++)
644 napi_disable(&adapter->napi[i]);
645
646 adapter->napi_enabled = false;
647 }
648
649 static int ibmvnic_login(struct net_device *netdev)
650 {
651 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
652 unsigned long timeout = msecs_to_jiffies(30000);
653 struct device *dev = &adapter->vdev->dev;
654
655 do {
656 if (adapter->renegotiate) {
657 adapter->renegotiate = false;
658 release_sub_crqs(adapter);
659
660 reinit_completion(&adapter->init_done);
661 send_cap_queries(adapter);
662 if (!wait_for_completion_timeout(&adapter->init_done,
663 timeout)) {
664 dev_err(dev, "Capabilities query timeout\n");
665 return -1;
666 }
667 }
668
669 reinit_completion(&adapter->init_done);
670 send_login(adapter);
671 if (!wait_for_completion_timeout(&adapter->init_done,
672 timeout)) {
673 dev_err(dev, "Login timeout\n");
674 return -1;
675 }
676 } while (adapter->renegotiate);
677
678 return 0;
679 }
680
681 static void release_resources(struct ibmvnic_adapter *adapter)
682 {
683 int i;
684
685 release_tx_pools(adapter);
686 release_rx_pools(adapter);
687
688 release_stats_token(adapter);
689 release_error_buffers(adapter);
690
691 if (adapter->napi) {
692 for (i = 0; i < adapter->req_rx_queues; i++) {
693 if (&adapter->napi[i])
694 netif_napi_del(&adapter->napi[i]);
695 }
696 }
697 }
698
699 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
700 {
701 struct net_device *netdev = adapter->netdev;
702 unsigned long timeout = msecs_to_jiffies(30000);
703 union ibmvnic_crq crq;
704 bool resend;
705 int rc;
706
707 netdev_err(netdev, "setting link state %d\n", link_state);
708 memset(&crq, 0, sizeof(crq));
709 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
710 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
711 crq.logical_link_state.link_state = link_state;
712
713 do {
714 resend = false;
715
716 reinit_completion(&adapter->init_done);
717 rc = ibmvnic_send_crq(adapter, &crq);
718 if (rc) {
719 netdev_err(netdev, "Failed to set link state\n");
720 return rc;
721 }
722
723 if (!wait_for_completion_timeout(&adapter->init_done,
724 timeout)) {
725 netdev_err(netdev, "timeout setting link state\n");
726 return -1;
727 }
728
729 if (adapter->init_done_rc == 1) {
730 /* Partuial success, delay and re-send */
731 mdelay(1000);
732 resend = true;
733 }
734 } while (resend);
735
736 return 0;
737 }
738
739 static int set_real_num_queues(struct net_device *netdev)
740 {
741 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
742 int rc;
743
744 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
745 if (rc) {
746 netdev_err(netdev, "failed to set the number of tx queues\n");
747 return rc;
748 }
749
750 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
751 if (rc)
752 netdev_err(netdev, "failed to set the number of rx queues\n");
753
754 return rc;
755 }
756
757 static int init_resources(struct ibmvnic_adapter *adapter)
758 {
759 struct net_device *netdev = adapter->netdev;
760 int i, rc;
761
762 rc = set_real_num_queues(netdev);
763 if (rc)
764 return rc;
765
766 rc = init_stats_token(adapter);
767 if (rc)
768 return rc;
769
770 adapter->map_id = 1;
771 adapter->napi = kcalloc(adapter->req_rx_queues,
772 sizeof(struct napi_struct), GFP_KERNEL);
773 if (!adapter->napi)
774 return -ENOMEM;
775
776 for (i = 0; i < adapter->req_rx_queues; i++) {
777 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
778 NAPI_POLL_WEIGHT);
779 }
780
781 send_map_query(adapter);
782
783 rc = init_rx_pools(netdev);
784 if (rc)
785 return rc;
786
787 rc = init_tx_pools(netdev);
788 return rc;
789 }
790
791 static int __ibmvnic_open(struct net_device *netdev)
792 {
793 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
794 enum vnic_state prev_state = adapter->state;
795 int i, rc;
796
797 adapter->state = VNIC_OPENING;
798 replenish_pools(adapter);
799 ibmvnic_napi_enable(adapter);
800
801 /* We're ready to receive frames, enable the sub-crq interrupts and
802 * set the logical link state to up
803 */
804 for (i = 0; i < adapter->req_rx_queues; i++) {
805 if (prev_state == VNIC_CLOSED)
806 enable_irq(adapter->rx_scrq[i]->irq);
807 else
808 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
809 }
810
811 for (i = 0; i < adapter->req_tx_queues; i++) {
812 if (prev_state == VNIC_CLOSED)
813 enable_irq(adapter->tx_scrq[i]->irq);
814 else
815 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
816 }
817
818 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
819 if (rc) {
820 for (i = 0; i < adapter->req_rx_queues; i++)
821 napi_disable(&adapter->napi[i]);
822 release_resources(adapter);
823 return rc;
824 }
825
826 netif_tx_start_all_queues(netdev);
827
828 if (prev_state == VNIC_CLOSED) {
829 for (i = 0; i < adapter->req_rx_queues; i++)
830 napi_schedule(&adapter->napi[i]);
831 }
832
833 adapter->state = VNIC_OPEN;
834 return rc;
835 }
836
837 static int ibmvnic_open(struct net_device *netdev)
838 {
839 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
840 int rc;
841
842 mutex_lock(&adapter->reset_lock);
843
844 if (adapter->state != VNIC_CLOSED) {
845 rc = ibmvnic_login(netdev);
846 if (rc) {
847 mutex_unlock(&adapter->reset_lock);
848 return rc;
849 }
850
851 rc = init_resources(adapter);
852 if (rc) {
853 netdev_err(netdev, "failed to initialize resources\n");
854 release_resources(adapter);
855 mutex_unlock(&adapter->reset_lock);
856 return rc;
857 }
858 }
859
860 rc = __ibmvnic_open(netdev);
861 mutex_unlock(&adapter->reset_lock);
862
863 return rc;
864 }
865
866 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
867 {
868 struct ibmvnic_tx_pool *tx_pool;
869 u64 tx_entries;
870 int tx_scrqs;
871 int i, j;
872
873 if (!adapter->tx_pool)
874 return;
875
876 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
877 tx_entries = adapter->req_tx_entries_per_subcrq;
878
879 /* Free any remaining skbs in the tx buffer pools */
880 for (i = 0; i < tx_scrqs; i++) {
881 tx_pool = &adapter->tx_pool[i];
882 if (!tx_pool)
883 continue;
884
885 for (j = 0; j < tx_entries; j++) {
886 if (tx_pool->tx_buff[j].skb) {
887 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
888 tx_pool->tx_buff[j].skb = NULL;
889 }
890 }
891 }
892 }
893
894 static int __ibmvnic_close(struct net_device *netdev)
895 {
896 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
897 int rc = 0;
898 int i;
899
900 adapter->state = VNIC_CLOSING;
901
902 /* ensure that transmissions are stopped if called by do_reset */
903 if (adapter->resetting)
904 netif_tx_disable(netdev);
905 else
906 netif_tx_stop_all_queues(netdev);
907
908 ibmvnic_napi_disable(adapter);
909
910 if (adapter->tx_scrq) {
911 for (i = 0; i < adapter->req_tx_queues; i++)
912 if (adapter->tx_scrq[i]->irq)
913 disable_irq(adapter->tx_scrq[i]->irq);
914 }
915
916 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
917 if (rc)
918 return rc;
919
920 if (adapter->rx_scrq) {
921 for (i = 0; i < adapter->req_rx_queues; i++) {
922 int retries = 10;
923
924 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
925 retries--;
926 mdelay(100);
927
928 if (retries == 0)
929 break;
930 }
931
932 if (adapter->rx_scrq[i]->irq)
933 disable_irq(adapter->rx_scrq[i]->irq);
934 }
935 }
936
937 clean_tx_pools(adapter);
938 adapter->state = VNIC_CLOSED;
939 return rc;
940 }
941
942 static int ibmvnic_close(struct net_device *netdev)
943 {
944 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
945 int rc;
946
947 mutex_lock(&adapter->reset_lock);
948 rc = __ibmvnic_close(netdev);
949 mutex_unlock(&adapter->reset_lock);
950
951 return rc;
952 }
953
954 /**
955 * build_hdr_data - creates L2/L3/L4 header data buffer
956 * @hdr_field - bitfield determining needed headers
957 * @skb - socket buffer
958 * @hdr_len - array of header lengths
959 * @tot_len - total length of data
960 *
961 * Reads hdr_field to determine which headers are needed by firmware.
962 * Builds a buffer containing these headers. Saves individual header
963 * lengths and total buffer length to be used to build descriptors.
964 */
965 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
966 int *hdr_len, u8 *hdr_data)
967 {
968 int len = 0;
969 u8 *hdr;
970
971 hdr_len[0] = sizeof(struct ethhdr);
972
973 if (skb->protocol == htons(ETH_P_IP)) {
974 hdr_len[1] = ip_hdr(skb)->ihl * 4;
975 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
976 hdr_len[2] = tcp_hdrlen(skb);
977 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
978 hdr_len[2] = sizeof(struct udphdr);
979 } else if (skb->protocol == htons(ETH_P_IPV6)) {
980 hdr_len[1] = sizeof(struct ipv6hdr);
981 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
982 hdr_len[2] = tcp_hdrlen(skb);
983 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
984 hdr_len[2] = sizeof(struct udphdr);
985 }
986
987 memset(hdr_data, 0, 120);
988 if ((hdr_field >> 6) & 1) {
989 hdr = skb_mac_header(skb);
990 memcpy(hdr_data, hdr, hdr_len[0]);
991 len += hdr_len[0];
992 }
993
994 if ((hdr_field >> 5) & 1) {
995 hdr = skb_network_header(skb);
996 memcpy(hdr_data + len, hdr, hdr_len[1]);
997 len += hdr_len[1];
998 }
999
1000 if ((hdr_field >> 4) & 1) {
1001 hdr = skb_transport_header(skb);
1002 memcpy(hdr_data + len, hdr, hdr_len[2]);
1003 len += hdr_len[2];
1004 }
1005 return len;
1006 }
1007
1008 /**
1009 * create_hdr_descs - create header and header extension descriptors
1010 * @hdr_field - bitfield determining needed headers
1011 * @data - buffer containing header data
1012 * @len - length of data buffer
1013 * @hdr_len - array of individual header lengths
1014 * @scrq_arr - descriptor array
1015 *
1016 * Creates header and, if needed, header extension descriptors and
1017 * places them in a descriptor array, scrq_arr
1018 */
1019
1020 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1021 union sub_crq *scrq_arr)
1022 {
1023 union sub_crq hdr_desc;
1024 int tmp_len = len;
1025 u8 *data, *cur;
1026 int tmp;
1027
1028 while (tmp_len > 0) {
1029 cur = hdr_data + len - tmp_len;
1030
1031 memset(&hdr_desc, 0, sizeof(hdr_desc));
1032 if (cur != hdr_data) {
1033 data = hdr_desc.hdr_ext.data;
1034 tmp = tmp_len > 29 ? 29 : tmp_len;
1035 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1036 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1037 hdr_desc.hdr_ext.len = tmp;
1038 } else {
1039 data = hdr_desc.hdr.data;
1040 tmp = tmp_len > 24 ? 24 : tmp_len;
1041 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1042 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1043 hdr_desc.hdr.len = tmp;
1044 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1045 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1046 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1047 hdr_desc.hdr.flag = hdr_field << 1;
1048 }
1049 memcpy(data, cur, tmp);
1050 tmp_len -= tmp;
1051 *scrq_arr = hdr_desc;
1052 scrq_arr++;
1053 }
1054 }
1055
1056 /**
1057 * build_hdr_descs_arr - build a header descriptor array
1058 * @skb - socket buffer
1059 * @num_entries - number of descriptors to be sent
1060 * @subcrq - first TX descriptor
1061 * @hdr_field - bit field determining which headers will be sent
1062 *
1063 * This function will build a TX descriptor array with applicable
1064 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1065 */
1066
1067 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1068 int *num_entries, u8 hdr_field)
1069 {
1070 int hdr_len[3] = {0, 0, 0};
1071 int tot_len, len;
1072 u8 *hdr_data = txbuff->hdr_data;
1073
1074 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1075 txbuff->hdr_data);
1076 len = tot_len;
1077 len -= 24;
1078 if (len > 0)
1079 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1080 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1081 txbuff->indir_arr + 1);
1082 }
1083
1084 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1085 {
1086 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1087 int queue_num = skb_get_queue_mapping(skb);
1088 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1089 struct device *dev = &adapter->vdev->dev;
1090 struct ibmvnic_tx_buff *tx_buff = NULL;
1091 struct ibmvnic_sub_crq_queue *tx_scrq;
1092 struct ibmvnic_tx_pool *tx_pool;
1093 unsigned int tx_send_failed = 0;
1094 unsigned int tx_map_failed = 0;
1095 unsigned int tx_dropped = 0;
1096 unsigned int tx_packets = 0;
1097 unsigned int tx_bytes = 0;
1098 dma_addr_t data_dma_addr;
1099 struct netdev_queue *txq;
1100 unsigned long lpar_rc;
1101 union sub_crq tx_crq;
1102 unsigned int offset;
1103 int num_entries = 1;
1104 unsigned char *dst;
1105 u64 *handle_array;
1106 int index = 0;
1107 int ret = 0;
1108
1109 if (adapter->resetting) {
1110 if (!netif_subqueue_stopped(netdev, skb))
1111 netif_stop_subqueue(netdev, queue_num);
1112 dev_kfree_skb_any(skb);
1113
1114 tx_send_failed++;
1115 tx_dropped++;
1116 ret = NETDEV_TX_OK;
1117 goto out;
1118 }
1119
1120 tx_pool = &adapter->tx_pool[queue_num];
1121 tx_scrq = adapter->tx_scrq[queue_num];
1122 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1123 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1124 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1125
1126 index = tx_pool->free_map[tx_pool->consumer_index];
1127 offset = index * adapter->req_mtu;
1128 dst = tx_pool->long_term_buff.buff + offset;
1129 memset(dst, 0, adapter->req_mtu);
1130 skb_copy_from_linear_data(skb, dst, skb->len);
1131 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1132
1133 tx_pool->consumer_index =
1134 (tx_pool->consumer_index + 1) %
1135 adapter->req_tx_entries_per_subcrq;
1136
1137 tx_buff = &tx_pool->tx_buff[index];
1138 tx_buff->skb = skb;
1139 tx_buff->data_dma[0] = data_dma_addr;
1140 tx_buff->data_len[0] = skb->len;
1141 tx_buff->index = index;
1142 tx_buff->pool_index = queue_num;
1143 tx_buff->last_frag = true;
1144
1145 memset(&tx_crq, 0, sizeof(tx_crq));
1146 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1147 tx_crq.v1.type = IBMVNIC_TX_DESC;
1148 tx_crq.v1.n_crq_elem = 1;
1149 tx_crq.v1.n_sge = 1;
1150 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1151 tx_crq.v1.correlator = cpu_to_be32(index);
1152 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1153 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1154 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1155
1156 if (adapter->vlan_header_insertion) {
1157 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1158 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1159 }
1160
1161 if (skb->protocol == htons(ETH_P_IP)) {
1162 if (ip_hdr(skb)->version == 4)
1163 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1164 else if (ip_hdr(skb)->version == 6)
1165 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1166
1167 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1168 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1169 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1170 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1171 }
1172
1173 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1174 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1175 hdrs += 2;
1176 }
1177 /* determine if l2/3/4 headers are sent to firmware */
1178 if ((*hdrs >> 7) & 1 &&
1179 (skb->protocol == htons(ETH_P_IP) ||
1180 skb->protocol == htons(ETH_P_IPV6))) {
1181 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1182 tx_crq.v1.n_crq_elem = num_entries;
1183 tx_buff->indir_arr[0] = tx_crq;
1184 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1185 sizeof(tx_buff->indir_arr),
1186 DMA_TO_DEVICE);
1187 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1188 dev_kfree_skb_any(skb);
1189 tx_buff->skb = NULL;
1190 if (!firmware_has_feature(FW_FEATURE_CMO))
1191 dev_err(dev, "tx: unable to map descriptor array\n");
1192 tx_map_failed++;
1193 tx_dropped++;
1194 ret = NETDEV_TX_OK;
1195 goto out;
1196 }
1197 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1198 (u64)tx_buff->indir_dma,
1199 (u64)num_entries);
1200 } else {
1201 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1202 &tx_crq);
1203 }
1204 if (lpar_rc != H_SUCCESS) {
1205 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1206
1207 if (tx_pool->consumer_index == 0)
1208 tx_pool->consumer_index =
1209 adapter->req_tx_entries_per_subcrq - 1;
1210 else
1211 tx_pool->consumer_index--;
1212
1213 dev_kfree_skb_any(skb);
1214 tx_buff->skb = NULL;
1215
1216 if (lpar_rc == H_CLOSED) {
1217 /* Disable TX and report carrier off if queue is closed.
1218 * Firmware guarantees that a signal will be sent to the
1219 * driver, triggering a reset or some other action.
1220 */
1221 netif_tx_stop_all_queues(netdev);
1222 netif_carrier_off(netdev);
1223 }
1224
1225 tx_send_failed++;
1226 tx_dropped++;
1227 ret = NETDEV_TX_OK;
1228 goto out;
1229 }
1230
1231 if (atomic_inc_return(&tx_scrq->used)
1232 >= adapter->req_tx_entries_per_subcrq) {
1233 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1234 netif_stop_subqueue(netdev, queue_num);
1235 }
1236
1237 tx_packets++;
1238 tx_bytes += skb->len;
1239 txq->trans_start = jiffies;
1240 ret = NETDEV_TX_OK;
1241
1242 out:
1243 netdev->stats.tx_dropped += tx_dropped;
1244 netdev->stats.tx_bytes += tx_bytes;
1245 netdev->stats.tx_packets += tx_packets;
1246 adapter->tx_send_failed += tx_send_failed;
1247 adapter->tx_map_failed += tx_map_failed;
1248
1249 return ret;
1250 }
1251
1252 static void ibmvnic_set_multi(struct net_device *netdev)
1253 {
1254 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1255 struct netdev_hw_addr *ha;
1256 union ibmvnic_crq crq;
1257
1258 memset(&crq, 0, sizeof(crq));
1259 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1260 crq.request_capability.cmd = REQUEST_CAPABILITY;
1261
1262 if (netdev->flags & IFF_PROMISC) {
1263 if (!adapter->promisc_supported)
1264 return;
1265 } else {
1266 if (netdev->flags & IFF_ALLMULTI) {
1267 /* Accept all multicast */
1268 memset(&crq, 0, sizeof(crq));
1269 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1270 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1271 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1272 ibmvnic_send_crq(adapter, &crq);
1273 } else if (netdev_mc_empty(netdev)) {
1274 /* Reject all multicast */
1275 memset(&crq, 0, sizeof(crq));
1276 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1277 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1278 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1279 ibmvnic_send_crq(adapter, &crq);
1280 } else {
1281 /* Accept one or more multicast(s) */
1282 netdev_for_each_mc_addr(ha, netdev) {
1283 memset(&crq, 0, sizeof(crq));
1284 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1285 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1286 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1287 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1288 ha->addr);
1289 ibmvnic_send_crq(adapter, &crq);
1290 }
1291 }
1292 }
1293 }
1294
1295 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1296 {
1297 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1298 struct sockaddr *addr = p;
1299 union ibmvnic_crq crq;
1300
1301 if (!is_valid_ether_addr(addr->sa_data))
1302 return -EADDRNOTAVAIL;
1303
1304 memset(&crq, 0, sizeof(crq));
1305 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1306 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1307 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1308 ibmvnic_send_crq(adapter, &crq);
1309 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1310 return 0;
1311 }
1312
1313 /**
1314 * do_reset returns zero if we are able to keep processing reset events, or
1315 * non-zero if we hit a fatal error and must halt.
1316 */
1317 static int do_reset(struct ibmvnic_adapter *adapter,
1318 struct ibmvnic_rwi *rwi, u32 reset_state)
1319 {
1320 struct net_device *netdev = adapter->netdev;
1321 int i, rc;
1322
1323 netif_carrier_off(netdev);
1324 adapter->reset_reason = rwi->reset_reason;
1325
1326 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1327 rc = ibmvnic_reenable_crq_queue(adapter);
1328 if (rc)
1329 return 0;
1330 }
1331
1332 rc = __ibmvnic_close(netdev);
1333 if (rc)
1334 return rc;
1335
1336 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1337 /* remove the closed state so when we call open it appears
1338 * we are coming from the probed state.
1339 */
1340 adapter->state = VNIC_PROBED;
1341
1342 rc = ibmvnic_init(adapter);
1343 if (rc)
1344 return 0;
1345
1346 /* If the adapter was in PROBE state prior to the reset,
1347 * exit here.
1348 */
1349 if (reset_state == VNIC_PROBED)
1350 return 0;
1351
1352 rc = ibmvnic_login(netdev);
1353 if (rc) {
1354 adapter->state = VNIC_PROBED;
1355 return 0;
1356 }
1357
1358 rc = reset_tx_pools(adapter);
1359 if (rc)
1360 return rc;
1361
1362 rc = reset_rx_pools(adapter);
1363 if (rc)
1364 return rc;
1365
1366 if (reset_state == VNIC_CLOSED)
1367 return 0;
1368 }
1369
1370 rc = __ibmvnic_open(netdev);
1371 if (rc) {
1372 if (list_empty(&adapter->rwi_list))
1373 adapter->state = VNIC_CLOSED;
1374 else
1375 adapter->state = reset_state;
1376
1377 return 0;
1378 }
1379
1380 netif_carrier_on(netdev);
1381
1382 /* kick napi */
1383 for (i = 0; i < adapter->req_rx_queues; i++)
1384 napi_schedule(&adapter->napi[i]);
1385
1386 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1387 netdev_notify_peers(netdev);
1388
1389 return 0;
1390 }
1391
1392 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1393 {
1394 struct ibmvnic_rwi *rwi;
1395
1396 mutex_lock(&adapter->rwi_lock);
1397
1398 if (!list_empty(&adapter->rwi_list)) {
1399 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1400 list);
1401 list_del(&rwi->list);
1402 } else {
1403 rwi = NULL;
1404 }
1405
1406 mutex_unlock(&adapter->rwi_lock);
1407 return rwi;
1408 }
1409
1410 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1411 {
1412 struct ibmvnic_rwi *rwi;
1413
1414 rwi = get_next_rwi(adapter);
1415 while (rwi) {
1416 kfree(rwi);
1417 rwi = get_next_rwi(adapter);
1418 }
1419 }
1420
1421 static void __ibmvnic_reset(struct work_struct *work)
1422 {
1423 struct ibmvnic_rwi *rwi;
1424 struct ibmvnic_adapter *adapter;
1425 struct net_device *netdev;
1426 u32 reset_state;
1427 int rc;
1428
1429 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1430 netdev = adapter->netdev;
1431
1432 mutex_lock(&adapter->reset_lock);
1433 adapter->resetting = true;
1434 reset_state = adapter->state;
1435
1436 rwi = get_next_rwi(adapter);
1437 while (rwi) {
1438 rc = do_reset(adapter, rwi, reset_state);
1439 kfree(rwi);
1440 if (rc)
1441 break;
1442
1443 rwi = get_next_rwi(adapter);
1444 }
1445
1446 if (rc) {
1447 free_all_rwi(adapter);
1448 mutex_unlock(&adapter->reset_lock);
1449 return;
1450 }
1451
1452 adapter->resetting = false;
1453 mutex_unlock(&adapter->reset_lock);
1454 }
1455
1456 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1457 enum ibmvnic_reset_reason reason)
1458 {
1459 struct ibmvnic_rwi *rwi, *tmp;
1460 struct net_device *netdev = adapter->netdev;
1461 struct list_head *entry;
1462
1463 if (adapter->state == VNIC_REMOVING ||
1464 adapter->state == VNIC_REMOVED) {
1465 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1466 return;
1467 }
1468
1469 if (adapter->state == VNIC_PROBING) {
1470 netdev_warn(netdev, "Adapter reset during probe\n");
1471 adapter->init_done_rc = EAGAIN;
1472 return;
1473 }
1474
1475 mutex_lock(&adapter->rwi_lock);
1476
1477 list_for_each(entry, &adapter->rwi_list) {
1478 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1479 if (tmp->reset_reason == reason) {
1480 netdev_err(netdev, "Matching reset found, skipping\n");
1481 mutex_unlock(&adapter->rwi_lock);
1482 return;
1483 }
1484 }
1485
1486 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1487 if (!rwi) {
1488 mutex_unlock(&adapter->rwi_lock);
1489 ibmvnic_close(netdev);
1490 return;
1491 }
1492
1493 rwi->reset_reason = reason;
1494 list_add_tail(&rwi->list, &adapter->rwi_list);
1495 mutex_unlock(&adapter->rwi_lock);
1496 schedule_work(&adapter->ibmvnic_reset);
1497 }
1498
1499 static void ibmvnic_tx_timeout(struct net_device *dev)
1500 {
1501 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1502
1503 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1504 }
1505
1506 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1507 struct ibmvnic_rx_buff *rx_buff)
1508 {
1509 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1510
1511 rx_buff->skb = NULL;
1512
1513 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1514 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1515
1516 atomic_dec(&pool->available);
1517 }
1518
1519 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1520 {
1521 struct net_device *netdev = napi->dev;
1522 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1523 int scrq_num = (int)(napi - adapter->napi);
1524 int frames_processed = 0;
1525
1526 restart_poll:
1527 while (frames_processed < budget) {
1528 struct sk_buff *skb;
1529 struct ibmvnic_rx_buff *rx_buff;
1530 union sub_crq *next;
1531 u32 length;
1532 u16 offset;
1533 u8 flags = 0;
1534
1535 if (unlikely(adapter->resetting)) {
1536 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1537 napi_complete_done(napi, frames_processed);
1538 return frames_processed;
1539 }
1540
1541 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1542 break;
1543 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1544 rx_buff =
1545 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1546 rx_comp.correlator);
1547 /* do error checking */
1548 if (next->rx_comp.rc) {
1549 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1550 /* free the entry */
1551 next->rx_comp.first = 0;
1552 remove_buff_from_pool(adapter, rx_buff);
1553 continue;
1554 }
1555
1556 length = be32_to_cpu(next->rx_comp.len);
1557 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1558 flags = next->rx_comp.flags;
1559 skb = rx_buff->skb;
1560 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1561 length);
1562
1563 /* VLAN Header has been stripped by the system firmware and
1564 * needs to be inserted by the driver
1565 */
1566 if (adapter->rx_vlan_header_insertion &&
1567 (flags & IBMVNIC_VLAN_STRIPPED))
1568 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1569 ntohs(next->rx_comp.vlan_tci));
1570
1571 /* free the entry */
1572 next->rx_comp.first = 0;
1573 remove_buff_from_pool(adapter, rx_buff);
1574
1575 skb_put(skb, length);
1576 skb->protocol = eth_type_trans(skb, netdev);
1577 skb_record_rx_queue(skb, scrq_num);
1578
1579 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1580 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1581 skb->ip_summed = CHECKSUM_UNNECESSARY;
1582 }
1583
1584 length = skb->len;
1585 napi_gro_receive(napi, skb); /* send it up */
1586 netdev->stats.rx_packets++;
1587 netdev->stats.rx_bytes += length;
1588 frames_processed++;
1589 }
1590
1591 if (adapter->state != VNIC_CLOSING)
1592 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1593
1594 if (frames_processed < budget) {
1595 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1596 napi_complete_done(napi, frames_processed);
1597 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1598 napi_reschedule(napi)) {
1599 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1600 goto restart_poll;
1601 }
1602 }
1603 return frames_processed;
1604 }
1605
1606 #ifdef CONFIG_NET_POLL_CONTROLLER
1607 static void ibmvnic_netpoll_controller(struct net_device *dev)
1608 {
1609 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1610 int i;
1611
1612 replenish_pools(netdev_priv(dev));
1613 for (i = 0; i < adapter->req_rx_queues; i++)
1614 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1615 adapter->rx_scrq[i]);
1616 }
1617 #endif
1618
1619 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1620 {
1621 return -EOPNOTSUPP;
1622 }
1623
1624 static const struct net_device_ops ibmvnic_netdev_ops = {
1625 .ndo_open = ibmvnic_open,
1626 .ndo_stop = ibmvnic_close,
1627 .ndo_start_xmit = ibmvnic_xmit,
1628 .ndo_set_rx_mode = ibmvnic_set_multi,
1629 .ndo_set_mac_address = ibmvnic_set_mac,
1630 .ndo_validate_addr = eth_validate_addr,
1631 .ndo_tx_timeout = ibmvnic_tx_timeout,
1632 #ifdef CONFIG_NET_POLL_CONTROLLER
1633 .ndo_poll_controller = ibmvnic_netpoll_controller,
1634 #endif
1635 .ndo_change_mtu = ibmvnic_change_mtu,
1636 };
1637
1638 /* ethtool functions */
1639
1640 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1641 struct ethtool_link_ksettings *cmd)
1642 {
1643 u32 supported, advertising;
1644
1645 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1646 SUPPORTED_FIBRE);
1647 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1648 ADVERTISED_FIBRE);
1649 cmd->base.speed = SPEED_1000;
1650 cmd->base.duplex = DUPLEX_FULL;
1651 cmd->base.port = PORT_FIBRE;
1652 cmd->base.phy_address = 0;
1653 cmd->base.autoneg = AUTONEG_ENABLE;
1654
1655 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1656 supported);
1657 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1658 advertising);
1659
1660 return 0;
1661 }
1662
1663 static void ibmvnic_get_drvinfo(struct net_device *dev,
1664 struct ethtool_drvinfo *info)
1665 {
1666 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1667 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1668 }
1669
1670 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1671 {
1672 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1673
1674 return adapter->msg_enable;
1675 }
1676
1677 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1678 {
1679 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1680
1681 adapter->msg_enable = data;
1682 }
1683
1684 static u32 ibmvnic_get_link(struct net_device *netdev)
1685 {
1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1687
1688 /* Don't need to send a query because we request a logical link up at
1689 * init and then we wait for link state indications
1690 */
1691 return adapter->logical_link_state;
1692 }
1693
1694 static void ibmvnic_get_ringparam(struct net_device *netdev,
1695 struct ethtool_ringparam *ring)
1696 {
1697 ring->rx_max_pending = 0;
1698 ring->tx_max_pending = 0;
1699 ring->rx_mini_max_pending = 0;
1700 ring->rx_jumbo_max_pending = 0;
1701 ring->rx_pending = 0;
1702 ring->tx_pending = 0;
1703 ring->rx_mini_pending = 0;
1704 ring->rx_jumbo_pending = 0;
1705 }
1706
1707 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1708 {
1709 int i;
1710
1711 if (stringset != ETH_SS_STATS)
1712 return;
1713
1714 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1715 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1716 }
1717
1718 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1719 {
1720 switch (sset) {
1721 case ETH_SS_STATS:
1722 return ARRAY_SIZE(ibmvnic_stats);
1723 default:
1724 return -EOPNOTSUPP;
1725 }
1726 }
1727
1728 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1729 struct ethtool_stats *stats, u64 *data)
1730 {
1731 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1732 union ibmvnic_crq crq;
1733 int i;
1734
1735 memset(&crq, 0, sizeof(crq));
1736 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1737 crq.request_statistics.cmd = REQUEST_STATISTICS;
1738 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1739 crq.request_statistics.len =
1740 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1741
1742 /* Wait for data to be written */
1743 init_completion(&adapter->stats_done);
1744 ibmvnic_send_crq(adapter, &crq);
1745 wait_for_completion(&adapter->stats_done);
1746
1747 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1748 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1749 }
1750
1751 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1752 .get_drvinfo = ibmvnic_get_drvinfo,
1753 .get_msglevel = ibmvnic_get_msglevel,
1754 .set_msglevel = ibmvnic_set_msglevel,
1755 .get_link = ibmvnic_get_link,
1756 .get_ringparam = ibmvnic_get_ringparam,
1757 .get_strings = ibmvnic_get_strings,
1758 .get_sset_count = ibmvnic_get_sset_count,
1759 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1760 .get_link_ksettings = ibmvnic_get_link_ksettings,
1761 };
1762
1763 /* Routines for managing CRQs/sCRQs */
1764
1765 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1766 struct ibmvnic_sub_crq_queue *scrq)
1767 {
1768 int rc;
1769
1770 if (scrq->irq) {
1771 free_irq(scrq->irq, scrq);
1772 irq_dispose_mapping(scrq->irq);
1773 scrq->irq = 0;
1774 }
1775
1776 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1777 scrq->cur = 0;
1778
1779 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1780 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1781 return rc;
1782 }
1783
1784 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1785 {
1786 int i, rc;
1787
1788 for (i = 0; i < adapter->req_tx_queues; i++) {
1789 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1790 if (rc)
1791 return rc;
1792 }
1793
1794 for (i = 0; i < adapter->req_rx_queues; i++) {
1795 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1796 if (rc)
1797 return rc;
1798 }
1799
1800 return rc;
1801 }
1802
1803 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1804 struct ibmvnic_sub_crq_queue *scrq)
1805 {
1806 struct device *dev = &adapter->vdev->dev;
1807 long rc;
1808
1809 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1810
1811 /* Close the sub-crqs */
1812 do {
1813 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1814 adapter->vdev->unit_address,
1815 scrq->crq_num);
1816 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1817
1818 if (rc) {
1819 netdev_err(adapter->netdev,
1820 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1821 scrq->crq_num, rc);
1822 }
1823
1824 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1825 DMA_BIDIRECTIONAL);
1826 free_pages((unsigned long)scrq->msgs, 2);
1827 kfree(scrq);
1828 }
1829
1830 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1831 *adapter)
1832 {
1833 struct device *dev = &adapter->vdev->dev;
1834 struct ibmvnic_sub_crq_queue *scrq;
1835 int rc;
1836
1837 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1838 if (!scrq)
1839 return NULL;
1840
1841 scrq->msgs =
1842 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1843 if (!scrq->msgs) {
1844 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1845 goto zero_page_failed;
1846 }
1847
1848 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1849 DMA_BIDIRECTIONAL);
1850 if (dma_mapping_error(dev, scrq->msg_token)) {
1851 dev_warn(dev, "Couldn't map crq queue messages page\n");
1852 goto map_failed;
1853 }
1854
1855 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1856 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1857
1858 if (rc == H_RESOURCE)
1859 rc = ibmvnic_reset_crq(adapter);
1860
1861 if (rc == H_CLOSED) {
1862 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1863 } else if (rc) {
1864 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1865 goto reg_failed;
1866 }
1867
1868 scrq->adapter = adapter;
1869 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1870 spin_lock_init(&scrq->lock);
1871
1872 netdev_dbg(adapter->netdev,
1873 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1874 scrq->crq_num, scrq->hw_irq, scrq->irq);
1875
1876 return scrq;
1877
1878 reg_failed:
1879 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1880 DMA_BIDIRECTIONAL);
1881 map_failed:
1882 free_pages((unsigned long)scrq->msgs, 2);
1883 zero_page_failed:
1884 kfree(scrq);
1885
1886 return NULL;
1887 }
1888
1889 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1890 {
1891 int i;
1892
1893 if (adapter->tx_scrq) {
1894 for (i = 0; i < adapter->req_tx_queues; i++) {
1895 if (!adapter->tx_scrq[i])
1896 continue;
1897
1898 if (adapter->tx_scrq[i]->irq) {
1899 free_irq(adapter->tx_scrq[i]->irq,
1900 adapter->tx_scrq[i]);
1901 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1902 adapter->tx_scrq[i]->irq = 0;
1903 }
1904
1905 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1906 }
1907
1908 kfree(adapter->tx_scrq);
1909 adapter->tx_scrq = NULL;
1910 }
1911
1912 if (adapter->rx_scrq) {
1913 for (i = 0; i < adapter->req_rx_queues; i++) {
1914 if (!adapter->rx_scrq[i])
1915 continue;
1916
1917 if (adapter->rx_scrq[i]->irq) {
1918 free_irq(adapter->rx_scrq[i]->irq,
1919 adapter->rx_scrq[i]);
1920 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1921 adapter->rx_scrq[i]->irq = 0;
1922 }
1923
1924 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1925 }
1926
1927 kfree(adapter->rx_scrq);
1928 adapter->rx_scrq = NULL;
1929 }
1930 }
1931
1932 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1933 struct ibmvnic_sub_crq_queue *scrq)
1934 {
1935 struct device *dev = &adapter->vdev->dev;
1936 unsigned long rc;
1937
1938 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1939 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1940 if (rc)
1941 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1942 scrq->hw_irq, rc);
1943 return rc;
1944 }
1945
1946 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1947 struct ibmvnic_sub_crq_queue *scrq)
1948 {
1949 struct device *dev = &adapter->vdev->dev;
1950 unsigned long rc;
1951
1952 if (scrq->hw_irq > 0x100000000ULL) {
1953 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1954 return 1;
1955 }
1956
1957 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1958 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1959 if (rc)
1960 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1961 scrq->hw_irq, rc);
1962 return rc;
1963 }
1964
1965 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1966 struct ibmvnic_sub_crq_queue *scrq)
1967 {
1968 struct device *dev = &adapter->vdev->dev;
1969 struct ibmvnic_tx_buff *txbuff;
1970 union sub_crq *next;
1971 int index;
1972 int i, j;
1973 u8 first;
1974
1975 restart_loop:
1976 while (pending_scrq(adapter, scrq)) {
1977 unsigned int pool = scrq->pool_index;
1978
1979 next = ibmvnic_next_scrq(adapter, scrq);
1980 for (i = 0; i < next->tx_comp.num_comps; i++) {
1981 if (next->tx_comp.rcs[i]) {
1982 dev_err(dev, "tx error %x\n",
1983 next->tx_comp.rcs[i]);
1984 continue;
1985 }
1986 index = be32_to_cpu(next->tx_comp.correlators[i]);
1987 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1988
1989 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1990 if (!txbuff->data_dma[j])
1991 continue;
1992
1993 txbuff->data_dma[j] = 0;
1994 }
1995 /* if sub_crq was sent indirectly */
1996 first = txbuff->indir_arr[0].generic.first;
1997 if (first == IBMVNIC_CRQ_CMD) {
1998 dma_unmap_single(dev, txbuff->indir_dma,
1999 sizeof(txbuff->indir_arr),
2000 DMA_TO_DEVICE);
2001 }
2002
2003 if (txbuff->last_frag) {
2004 dev_kfree_skb_any(txbuff->skb);
2005 txbuff->skb = NULL;
2006 }
2007
2008 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2009 producer_index] = index;
2010 adapter->tx_pool[pool].producer_index =
2011 (adapter->tx_pool[pool].producer_index + 1) %
2012 adapter->req_tx_entries_per_subcrq;
2013 }
2014 /* remove tx_comp scrq*/
2015 next->tx_comp.first = 0;
2016
2017 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2018 (adapter->req_tx_entries_per_subcrq / 2) &&
2019 __netif_subqueue_stopped(adapter->netdev,
2020 scrq->pool_index)) {
2021 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2022 netdev_info(adapter->netdev, "Started queue %d\n",
2023 scrq->pool_index);
2024 }
2025 }
2026
2027 enable_scrq_irq(adapter, scrq);
2028
2029 if (pending_scrq(adapter, scrq)) {
2030 disable_scrq_irq(adapter, scrq);
2031 goto restart_loop;
2032 }
2033
2034 return 0;
2035 }
2036
2037 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2038 {
2039 struct ibmvnic_sub_crq_queue *scrq = instance;
2040 struct ibmvnic_adapter *adapter = scrq->adapter;
2041
2042 disable_scrq_irq(adapter, scrq);
2043 ibmvnic_complete_tx(adapter, scrq);
2044
2045 return IRQ_HANDLED;
2046 }
2047
2048 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2049 {
2050 struct ibmvnic_sub_crq_queue *scrq = instance;
2051 struct ibmvnic_adapter *adapter = scrq->adapter;
2052
2053 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2054 disable_scrq_irq(adapter, scrq);
2055 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2056 }
2057
2058 return IRQ_HANDLED;
2059 }
2060
2061 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2062 {
2063 struct device *dev = &adapter->vdev->dev;
2064 struct ibmvnic_sub_crq_queue *scrq;
2065 int i = 0, j = 0;
2066 int rc = 0;
2067
2068 for (i = 0; i < adapter->req_tx_queues; i++) {
2069 scrq = adapter->tx_scrq[i];
2070 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2071
2072 if (!scrq->irq) {
2073 rc = -EINVAL;
2074 dev_err(dev, "Error mapping irq\n");
2075 goto req_tx_irq_failed;
2076 }
2077
2078 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2079 0, "ibmvnic_tx", scrq);
2080
2081 if (rc) {
2082 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2083 scrq->irq, rc);
2084 irq_dispose_mapping(scrq->irq);
2085 goto req_rx_irq_failed;
2086 }
2087 }
2088
2089 for (i = 0; i < adapter->req_rx_queues; i++) {
2090 scrq = adapter->rx_scrq[i];
2091 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2092 if (!scrq->irq) {
2093 rc = -EINVAL;
2094 dev_err(dev, "Error mapping irq\n");
2095 goto req_rx_irq_failed;
2096 }
2097 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2098 0, "ibmvnic_rx", scrq);
2099 if (rc) {
2100 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2101 scrq->irq, rc);
2102 irq_dispose_mapping(scrq->irq);
2103 goto req_rx_irq_failed;
2104 }
2105 }
2106 return rc;
2107
2108 req_rx_irq_failed:
2109 for (j = 0; j < i; j++) {
2110 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2111 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2112 }
2113 i = adapter->req_tx_queues;
2114 req_tx_irq_failed:
2115 for (j = 0; j < i; j++) {
2116 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2117 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2118 }
2119 release_sub_crqs(adapter);
2120 return rc;
2121 }
2122
2123 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2124 {
2125 struct device *dev = &adapter->vdev->dev;
2126 struct ibmvnic_sub_crq_queue **allqueues;
2127 int registered_queues = 0;
2128 int total_queues;
2129 int more = 0;
2130 int i;
2131
2132 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2133
2134 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2135 if (!allqueues)
2136 return -1;
2137
2138 for (i = 0; i < total_queues; i++) {
2139 allqueues[i] = init_sub_crq_queue(adapter);
2140 if (!allqueues[i]) {
2141 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2142 break;
2143 }
2144 registered_queues++;
2145 }
2146
2147 /* Make sure we were able to register the minimum number of queues */
2148 if (registered_queues <
2149 adapter->min_tx_queues + adapter->min_rx_queues) {
2150 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2151 goto tx_failed;
2152 }
2153
2154 /* Distribute the failed allocated queues*/
2155 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2156 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2157 switch (i % 3) {
2158 case 0:
2159 if (adapter->req_rx_queues > adapter->min_rx_queues)
2160 adapter->req_rx_queues--;
2161 else
2162 more++;
2163 break;
2164 case 1:
2165 if (adapter->req_tx_queues > adapter->min_tx_queues)
2166 adapter->req_tx_queues--;
2167 else
2168 more++;
2169 break;
2170 }
2171 }
2172
2173 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2174 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2175 if (!adapter->tx_scrq)
2176 goto tx_failed;
2177
2178 for (i = 0; i < adapter->req_tx_queues; i++) {
2179 adapter->tx_scrq[i] = allqueues[i];
2180 adapter->tx_scrq[i]->pool_index = i;
2181 }
2182
2183 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2184 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2185 if (!adapter->rx_scrq)
2186 goto rx_failed;
2187
2188 for (i = 0; i < adapter->req_rx_queues; i++) {
2189 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2190 adapter->rx_scrq[i]->scrq_num = i;
2191 }
2192
2193 kfree(allqueues);
2194 return 0;
2195
2196 rx_failed:
2197 kfree(adapter->tx_scrq);
2198 adapter->tx_scrq = NULL;
2199 tx_failed:
2200 for (i = 0; i < registered_queues; i++)
2201 release_sub_crq_queue(adapter, allqueues[i]);
2202 kfree(allqueues);
2203 return -1;
2204 }
2205
2206 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2207 {
2208 struct device *dev = &adapter->vdev->dev;
2209 union ibmvnic_crq crq;
2210
2211 if (!retry) {
2212 /* Sub-CRQ entries are 32 byte long */
2213 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2214
2215 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2216 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2217 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2218 return;
2219 }
2220
2221 /* Get the minimum between the queried max and the entries
2222 * that fit in our PAGE_SIZE
2223 */
2224 adapter->req_tx_entries_per_subcrq =
2225 adapter->max_tx_entries_per_subcrq > entries_page ?
2226 entries_page : adapter->max_tx_entries_per_subcrq;
2227 adapter->req_rx_add_entries_per_subcrq =
2228 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2229 entries_page : adapter->max_rx_add_entries_per_subcrq;
2230
2231 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2232 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2233 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2234
2235 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2236 }
2237
2238 memset(&crq, 0, sizeof(crq));
2239 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2240 crq.request_capability.cmd = REQUEST_CAPABILITY;
2241
2242 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2243 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2244 atomic_inc(&adapter->running_cap_crqs);
2245 ibmvnic_send_crq(adapter, &crq);
2246
2247 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2248 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2249 atomic_inc(&adapter->running_cap_crqs);
2250 ibmvnic_send_crq(adapter, &crq);
2251
2252 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2253 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2254 atomic_inc(&adapter->running_cap_crqs);
2255 ibmvnic_send_crq(adapter, &crq);
2256
2257 crq.request_capability.capability =
2258 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2259 crq.request_capability.number =
2260 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2261 atomic_inc(&adapter->running_cap_crqs);
2262 ibmvnic_send_crq(adapter, &crq);
2263
2264 crq.request_capability.capability =
2265 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2266 crq.request_capability.number =
2267 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2268 atomic_inc(&adapter->running_cap_crqs);
2269 ibmvnic_send_crq(adapter, &crq);
2270
2271 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2272 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2273 atomic_inc(&adapter->running_cap_crqs);
2274 ibmvnic_send_crq(adapter, &crq);
2275
2276 if (adapter->netdev->flags & IFF_PROMISC) {
2277 if (adapter->promisc_supported) {
2278 crq.request_capability.capability =
2279 cpu_to_be16(PROMISC_REQUESTED);
2280 crq.request_capability.number = cpu_to_be64(1);
2281 atomic_inc(&adapter->running_cap_crqs);
2282 ibmvnic_send_crq(adapter, &crq);
2283 }
2284 } else {
2285 crq.request_capability.capability =
2286 cpu_to_be16(PROMISC_REQUESTED);
2287 crq.request_capability.number = cpu_to_be64(0);
2288 atomic_inc(&adapter->running_cap_crqs);
2289 ibmvnic_send_crq(adapter, &crq);
2290 }
2291 }
2292
2293 static int pending_scrq(struct ibmvnic_adapter *adapter,
2294 struct ibmvnic_sub_crq_queue *scrq)
2295 {
2296 union sub_crq *entry = &scrq->msgs[scrq->cur];
2297
2298 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2299 return 1;
2300 else
2301 return 0;
2302 }
2303
2304 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2305 struct ibmvnic_sub_crq_queue *scrq)
2306 {
2307 union sub_crq *entry;
2308 unsigned long flags;
2309
2310 spin_lock_irqsave(&scrq->lock, flags);
2311 entry = &scrq->msgs[scrq->cur];
2312 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2313 if (++scrq->cur == scrq->size)
2314 scrq->cur = 0;
2315 } else {
2316 entry = NULL;
2317 }
2318 spin_unlock_irqrestore(&scrq->lock, flags);
2319
2320 return entry;
2321 }
2322
2323 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2324 {
2325 struct ibmvnic_crq_queue *queue = &adapter->crq;
2326 union ibmvnic_crq *crq;
2327
2328 crq = &queue->msgs[queue->cur];
2329 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2330 if (++queue->cur == queue->size)
2331 queue->cur = 0;
2332 } else {
2333 crq = NULL;
2334 }
2335
2336 return crq;
2337 }
2338
2339 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2340 union sub_crq *sub_crq)
2341 {
2342 unsigned int ua = adapter->vdev->unit_address;
2343 struct device *dev = &adapter->vdev->dev;
2344 u64 *u64_crq = (u64 *)sub_crq;
2345 int rc;
2346
2347 netdev_dbg(adapter->netdev,
2348 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2349 (unsigned long int)cpu_to_be64(remote_handle),
2350 (unsigned long int)cpu_to_be64(u64_crq[0]),
2351 (unsigned long int)cpu_to_be64(u64_crq[1]),
2352 (unsigned long int)cpu_to_be64(u64_crq[2]),
2353 (unsigned long int)cpu_to_be64(u64_crq[3]));
2354
2355 /* Make sure the hypervisor sees the complete request */
2356 mb();
2357
2358 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2359 cpu_to_be64(remote_handle),
2360 cpu_to_be64(u64_crq[0]),
2361 cpu_to_be64(u64_crq[1]),
2362 cpu_to_be64(u64_crq[2]),
2363 cpu_to_be64(u64_crq[3]));
2364
2365 if (rc) {
2366 if (rc == H_CLOSED)
2367 dev_warn(dev, "CRQ Queue closed\n");
2368 dev_err(dev, "Send error (rc=%d)\n", rc);
2369 }
2370
2371 return rc;
2372 }
2373
2374 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2375 u64 remote_handle, u64 ioba, u64 num_entries)
2376 {
2377 unsigned int ua = adapter->vdev->unit_address;
2378 struct device *dev = &adapter->vdev->dev;
2379 int rc;
2380
2381 /* Make sure the hypervisor sees the complete request */
2382 mb();
2383 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2384 cpu_to_be64(remote_handle),
2385 ioba, num_entries);
2386
2387 if (rc) {
2388 if (rc == H_CLOSED)
2389 dev_warn(dev, "CRQ Queue closed\n");
2390 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2391 }
2392
2393 return rc;
2394 }
2395
2396 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2397 union ibmvnic_crq *crq)
2398 {
2399 unsigned int ua = adapter->vdev->unit_address;
2400 struct device *dev = &adapter->vdev->dev;
2401 u64 *u64_crq = (u64 *)crq;
2402 int rc;
2403
2404 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2405 (unsigned long int)cpu_to_be64(u64_crq[0]),
2406 (unsigned long int)cpu_to_be64(u64_crq[1]));
2407
2408 /* Make sure the hypervisor sees the complete request */
2409 mb();
2410
2411 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2412 cpu_to_be64(u64_crq[0]),
2413 cpu_to_be64(u64_crq[1]));
2414
2415 if (rc) {
2416 if (rc == H_CLOSED)
2417 dev_warn(dev, "CRQ Queue closed\n");
2418 dev_warn(dev, "Send error (rc=%d)\n", rc);
2419 }
2420
2421 return rc;
2422 }
2423
2424 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2425 {
2426 union ibmvnic_crq crq;
2427
2428 memset(&crq, 0, sizeof(crq));
2429 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2430 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2431 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2432
2433 return ibmvnic_send_crq(adapter, &crq);
2434 }
2435
2436 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2437 {
2438 union ibmvnic_crq crq;
2439
2440 memset(&crq, 0, sizeof(crq));
2441 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2442 crq.version_exchange.cmd = VERSION_EXCHANGE;
2443 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2444
2445 return ibmvnic_send_crq(adapter, &crq);
2446 }
2447
2448 static void send_login(struct ibmvnic_adapter *adapter)
2449 {
2450 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2451 struct ibmvnic_login_buffer *login_buffer;
2452 struct device *dev = &adapter->vdev->dev;
2453 dma_addr_t rsp_buffer_token;
2454 dma_addr_t buffer_token;
2455 size_t rsp_buffer_size;
2456 union ibmvnic_crq crq;
2457 size_t buffer_size;
2458 __be64 *tx_list_p;
2459 __be64 *rx_list_p;
2460 int i;
2461
2462 buffer_size =
2463 sizeof(struct ibmvnic_login_buffer) +
2464 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2465
2466 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2467 if (!login_buffer)
2468 goto buf_alloc_failed;
2469
2470 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2471 DMA_TO_DEVICE);
2472 if (dma_mapping_error(dev, buffer_token)) {
2473 dev_err(dev, "Couldn't map login buffer\n");
2474 goto buf_map_failed;
2475 }
2476
2477 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2478 sizeof(u64) * adapter->req_tx_queues +
2479 sizeof(u64) * adapter->req_rx_queues +
2480 sizeof(u64) * adapter->req_rx_queues +
2481 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2482
2483 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2484 if (!login_rsp_buffer)
2485 goto buf_rsp_alloc_failed;
2486
2487 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2488 rsp_buffer_size, DMA_FROM_DEVICE);
2489 if (dma_mapping_error(dev, rsp_buffer_token)) {
2490 dev_err(dev, "Couldn't map login rsp buffer\n");
2491 goto buf_rsp_map_failed;
2492 }
2493
2494 adapter->login_buf = login_buffer;
2495 adapter->login_buf_token = buffer_token;
2496 adapter->login_buf_sz = buffer_size;
2497 adapter->login_rsp_buf = login_rsp_buffer;
2498 adapter->login_rsp_buf_token = rsp_buffer_token;
2499 adapter->login_rsp_buf_sz = rsp_buffer_size;
2500
2501 login_buffer->len = cpu_to_be32(buffer_size);
2502 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2503 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2504 login_buffer->off_txcomp_subcrqs =
2505 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2506 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2507 login_buffer->off_rxcomp_subcrqs =
2508 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2509 sizeof(u64) * adapter->req_tx_queues);
2510 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2511 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2512
2513 tx_list_p = (__be64 *)((char *)login_buffer +
2514 sizeof(struct ibmvnic_login_buffer));
2515 rx_list_p = (__be64 *)((char *)login_buffer +
2516 sizeof(struct ibmvnic_login_buffer) +
2517 sizeof(u64) * adapter->req_tx_queues);
2518
2519 for (i = 0; i < adapter->req_tx_queues; i++) {
2520 if (adapter->tx_scrq[i]) {
2521 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2522 crq_num);
2523 }
2524 }
2525
2526 for (i = 0; i < adapter->req_rx_queues; i++) {
2527 if (adapter->rx_scrq[i]) {
2528 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2529 crq_num);
2530 }
2531 }
2532
2533 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2534 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2535 netdev_dbg(adapter->netdev, "%016lx\n",
2536 ((unsigned long int *)(adapter->login_buf))[i]);
2537 }
2538
2539 memset(&crq, 0, sizeof(crq));
2540 crq.login.first = IBMVNIC_CRQ_CMD;
2541 crq.login.cmd = LOGIN;
2542 crq.login.ioba = cpu_to_be32(buffer_token);
2543 crq.login.len = cpu_to_be32(buffer_size);
2544 ibmvnic_send_crq(adapter, &crq);
2545
2546 return;
2547
2548 buf_rsp_map_failed:
2549 kfree(login_rsp_buffer);
2550 buf_rsp_alloc_failed:
2551 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2552 buf_map_failed:
2553 kfree(login_buffer);
2554 buf_alloc_failed:
2555 return;
2556 }
2557
2558 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2559 u32 len, u8 map_id)
2560 {
2561 union ibmvnic_crq crq;
2562
2563 memset(&crq, 0, sizeof(crq));
2564 crq.request_map.first = IBMVNIC_CRQ_CMD;
2565 crq.request_map.cmd = REQUEST_MAP;
2566 crq.request_map.map_id = map_id;
2567 crq.request_map.ioba = cpu_to_be32(addr);
2568 crq.request_map.len = cpu_to_be32(len);
2569 ibmvnic_send_crq(adapter, &crq);
2570 }
2571
2572 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2573 {
2574 union ibmvnic_crq crq;
2575
2576 memset(&crq, 0, sizeof(crq));
2577 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2578 crq.request_unmap.cmd = REQUEST_UNMAP;
2579 crq.request_unmap.map_id = map_id;
2580 ibmvnic_send_crq(adapter, &crq);
2581 }
2582
2583 static void send_map_query(struct ibmvnic_adapter *adapter)
2584 {
2585 union ibmvnic_crq crq;
2586
2587 memset(&crq, 0, sizeof(crq));
2588 crq.query_map.first = IBMVNIC_CRQ_CMD;
2589 crq.query_map.cmd = QUERY_MAP;
2590 ibmvnic_send_crq(adapter, &crq);
2591 }
2592
2593 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2594 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2595 {
2596 union ibmvnic_crq crq;
2597
2598 atomic_set(&adapter->running_cap_crqs, 0);
2599 memset(&crq, 0, sizeof(crq));
2600 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2601 crq.query_capability.cmd = QUERY_CAPABILITY;
2602
2603 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2604 atomic_inc(&adapter->running_cap_crqs);
2605 ibmvnic_send_crq(adapter, &crq);
2606
2607 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2608 atomic_inc(&adapter->running_cap_crqs);
2609 ibmvnic_send_crq(adapter, &crq);
2610
2611 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2612 atomic_inc(&adapter->running_cap_crqs);
2613 ibmvnic_send_crq(adapter, &crq);
2614
2615 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2616 atomic_inc(&adapter->running_cap_crqs);
2617 ibmvnic_send_crq(adapter, &crq);
2618
2619 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2620 atomic_inc(&adapter->running_cap_crqs);
2621 ibmvnic_send_crq(adapter, &crq);
2622
2623 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2624 atomic_inc(&adapter->running_cap_crqs);
2625 ibmvnic_send_crq(adapter, &crq);
2626
2627 crq.query_capability.capability =
2628 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2629 atomic_inc(&adapter->running_cap_crqs);
2630 ibmvnic_send_crq(adapter, &crq);
2631
2632 crq.query_capability.capability =
2633 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2634 atomic_inc(&adapter->running_cap_crqs);
2635 ibmvnic_send_crq(adapter, &crq);
2636
2637 crq.query_capability.capability =
2638 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2639 atomic_inc(&adapter->running_cap_crqs);
2640 ibmvnic_send_crq(adapter, &crq);
2641
2642 crq.query_capability.capability =
2643 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2644 atomic_inc(&adapter->running_cap_crqs);
2645 ibmvnic_send_crq(adapter, &crq);
2646
2647 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2648 atomic_inc(&adapter->running_cap_crqs);
2649 ibmvnic_send_crq(adapter, &crq);
2650
2651 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2652 atomic_inc(&adapter->running_cap_crqs);
2653 ibmvnic_send_crq(adapter, &crq);
2654
2655 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2656 atomic_inc(&adapter->running_cap_crqs);
2657 ibmvnic_send_crq(adapter, &crq);
2658
2659 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2660 atomic_inc(&adapter->running_cap_crqs);
2661 ibmvnic_send_crq(adapter, &crq);
2662
2663 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2664 atomic_inc(&adapter->running_cap_crqs);
2665 ibmvnic_send_crq(adapter, &crq);
2666
2667 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2668 atomic_inc(&adapter->running_cap_crqs);
2669 ibmvnic_send_crq(adapter, &crq);
2670
2671 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2672 atomic_inc(&adapter->running_cap_crqs);
2673 ibmvnic_send_crq(adapter, &crq);
2674
2675 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2676 atomic_inc(&adapter->running_cap_crqs);
2677 ibmvnic_send_crq(adapter, &crq);
2678
2679 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2680 atomic_inc(&adapter->running_cap_crqs);
2681 ibmvnic_send_crq(adapter, &crq);
2682
2683 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2684 atomic_inc(&adapter->running_cap_crqs);
2685 ibmvnic_send_crq(adapter, &crq);
2686
2687 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2688 atomic_inc(&adapter->running_cap_crqs);
2689 ibmvnic_send_crq(adapter, &crq);
2690
2691 crq.query_capability.capability =
2692 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2693 atomic_inc(&adapter->running_cap_crqs);
2694 ibmvnic_send_crq(adapter, &crq);
2695
2696 crq.query_capability.capability =
2697 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2698 atomic_inc(&adapter->running_cap_crqs);
2699 ibmvnic_send_crq(adapter, &crq);
2700
2701 crq.query_capability.capability =
2702 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2703 atomic_inc(&adapter->running_cap_crqs);
2704 ibmvnic_send_crq(adapter, &crq);
2705
2706 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2707 atomic_inc(&adapter->running_cap_crqs);
2708 ibmvnic_send_crq(adapter, &crq);
2709 }
2710
2711 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2712 {
2713 struct device *dev = &adapter->vdev->dev;
2714 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2715 union ibmvnic_crq crq;
2716 int i;
2717
2718 dma_unmap_single(dev, adapter->ip_offload_tok,
2719 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2720
2721 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2722 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2723 netdev_dbg(adapter->netdev, "%016lx\n",
2724 ((unsigned long int *)(buf))[i]);
2725
2726 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2727 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2728 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2729 buf->tcp_ipv4_chksum);
2730 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2731 buf->tcp_ipv6_chksum);
2732 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2733 buf->udp_ipv4_chksum);
2734 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2735 buf->udp_ipv6_chksum);
2736 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2737 buf->large_tx_ipv4);
2738 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2739 buf->large_tx_ipv6);
2740 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2741 buf->large_rx_ipv4);
2742 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2743 buf->large_rx_ipv6);
2744 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2745 buf->max_ipv4_header_size);
2746 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2747 buf->max_ipv6_header_size);
2748 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2749 buf->max_tcp_header_size);
2750 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2751 buf->max_udp_header_size);
2752 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2753 buf->max_large_tx_size);
2754 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2755 buf->max_large_rx_size);
2756 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2757 buf->ipv6_extension_header);
2758 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2759 buf->tcp_pseudosum_req);
2760 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2761 buf->num_ipv6_ext_headers);
2762 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2763 buf->off_ipv6_ext_headers);
2764
2765 adapter->ip_offload_ctrl_tok =
2766 dma_map_single(dev, &adapter->ip_offload_ctrl,
2767 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2768
2769 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2770 dev_err(dev, "Couldn't map ip offload control buffer\n");
2771 return;
2772 }
2773
2774 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2775 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2776 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2777 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2778 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2779
2780 /* large_tx/rx disabled for now, additional features needed */
2781 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2782 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2783 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2784 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2785
2786 adapter->netdev->features = NETIF_F_GSO;
2787
2788 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2789 adapter->netdev->features |= NETIF_F_IP_CSUM;
2790
2791 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2792 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2793
2794 if ((adapter->netdev->features &
2795 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2796 adapter->netdev->features |= NETIF_F_RXCSUM;
2797
2798 memset(&crq, 0, sizeof(crq));
2799 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2800 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2801 crq.control_ip_offload.len =
2802 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2803 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2804 ibmvnic_send_crq(adapter, &crq);
2805 }
2806
2807 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2808 struct ibmvnic_adapter *adapter)
2809 {
2810 struct device *dev = &adapter->vdev->dev;
2811 struct ibmvnic_error_buff *error_buff, *tmp;
2812 unsigned long flags;
2813 bool found = false;
2814 int i;
2815
2816 if (!crq->request_error_rsp.rc.code) {
2817 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2818 crq->request_error_rsp.rc.code);
2819 return;
2820 }
2821
2822 spin_lock_irqsave(&adapter->error_list_lock, flags);
2823 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2824 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2825 found = true;
2826 list_del(&error_buff->list);
2827 break;
2828 }
2829 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2830
2831 if (!found) {
2832 dev_err(dev, "Couldn't find error id %x\n",
2833 be32_to_cpu(crq->request_error_rsp.error_id));
2834 return;
2835 }
2836
2837 dev_err(dev, "Detailed info for error id %x:",
2838 be32_to_cpu(crq->request_error_rsp.error_id));
2839
2840 for (i = 0; i < error_buff->len; i++) {
2841 pr_cont("%02x", (int)error_buff->buff[i]);
2842 if (i % 8 == 7)
2843 pr_cont(" ");
2844 }
2845 pr_cont("\n");
2846
2847 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2848 DMA_FROM_DEVICE);
2849 kfree(error_buff->buff);
2850 kfree(error_buff);
2851 }
2852
2853 static void request_error_information(struct ibmvnic_adapter *adapter,
2854 union ibmvnic_crq *err_crq)
2855 {
2856 struct device *dev = &adapter->vdev->dev;
2857 struct net_device *netdev = adapter->netdev;
2858 struct ibmvnic_error_buff *error_buff;
2859 unsigned long timeout = msecs_to_jiffies(30000);
2860 union ibmvnic_crq crq;
2861 unsigned long flags;
2862 int rc, detail_len;
2863
2864 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2865 if (!error_buff)
2866 return;
2867
2868 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2869 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2870 if (!error_buff->buff) {
2871 kfree(error_buff);
2872 return;
2873 }
2874
2875 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2876 DMA_FROM_DEVICE);
2877 if (dma_mapping_error(dev, error_buff->dma)) {
2878 netdev_err(netdev, "Couldn't map error buffer\n");
2879 kfree(error_buff->buff);
2880 kfree(error_buff);
2881 return;
2882 }
2883
2884 error_buff->len = detail_len;
2885 error_buff->error_id = err_crq->error_indication.error_id;
2886
2887 spin_lock_irqsave(&adapter->error_list_lock, flags);
2888 list_add_tail(&error_buff->list, &adapter->errors);
2889 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2890
2891 memset(&crq, 0, sizeof(crq));
2892 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2893 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2894 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2895 crq.request_error_info.len = cpu_to_be32(detail_len);
2896 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2897
2898 rc = ibmvnic_send_crq(adapter, &crq);
2899 if (rc) {
2900 netdev_err(netdev, "failed to request error information\n");
2901 goto err_info_fail;
2902 }
2903
2904 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2905 netdev_err(netdev, "timeout waiting for error information\n");
2906 goto err_info_fail;
2907 }
2908
2909 return;
2910
2911 err_info_fail:
2912 spin_lock_irqsave(&adapter->error_list_lock, flags);
2913 list_del(&error_buff->list);
2914 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2915
2916 kfree(error_buff->buff);
2917 kfree(error_buff);
2918 }
2919
2920 static void handle_error_indication(union ibmvnic_crq *crq,
2921 struct ibmvnic_adapter *adapter)
2922 {
2923 struct device *dev = &adapter->vdev->dev;
2924
2925 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2926 crq->error_indication.flags
2927 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2928 be32_to_cpu(crq->error_indication.error_id),
2929 be16_to_cpu(crq->error_indication.error_cause));
2930
2931 if (be32_to_cpu(crq->error_indication.error_id))
2932 request_error_information(adapter, crq);
2933
2934 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2935 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2936 else
2937 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
2938 }
2939
2940 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2941 struct ibmvnic_adapter *adapter)
2942 {
2943 struct net_device *netdev = adapter->netdev;
2944 struct device *dev = &adapter->vdev->dev;
2945 long rc;
2946
2947 rc = crq->change_mac_addr_rsp.rc.code;
2948 if (rc) {
2949 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2950 return;
2951 }
2952 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2953 ETH_ALEN);
2954 }
2955
2956 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2957 struct ibmvnic_adapter *adapter)
2958 {
2959 struct device *dev = &adapter->vdev->dev;
2960 u64 *req_value;
2961 char *name;
2962
2963 atomic_dec(&adapter->running_cap_crqs);
2964 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2965 case REQ_TX_QUEUES:
2966 req_value = &adapter->req_tx_queues;
2967 name = "tx";
2968 break;
2969 case REQ_RX_QUEUES:
2970 req_value = &adapter->req_rx_queues;
2971 name = "rx";
2972 break;
2973 case REQ_RX_ADD_QUEUES:
2974 req_value = &adapter->req_rx_add_queues;
2975 name = "rx_add";
2976 break;
2977 case REQ_TX_ENTRIES_PER_SUBCRQ:
2978 req_value = &adapter->req_tx_entries_per_subcrq;
2979 name = "tx_entries_per_subcrq";
2980 break;
2981 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2982 req_value = &adapter->req_rx_add_entries_per_subcrq;
2983 name = "rx_add_entries_per_subcrq";
2984 break;
2985 case REQ_MTU:
2986 req_value = &adapter->req_mtu;
2987 name = "mtu";
2988 break;
2989 case PROMISC_REQUESTED:
2990 req_value = &adapter->promisc;
2991 name = "promisc";
2992 break;
2993 default:
2994 dev_err(dev, "Got invalid cap request rsp %d\n",
2995 crq->request_capability.capability);
2996 return;
2997 }
2998
2999 switch (crq->request_capability_rsp.rc.code) {
3000 case SUCCESS:
3001 break;
3002 case PARTIALSUCCESS:
3003 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3004 *req_value,
3005 (long int)be64_to_cpu(crq->request_capability_rsp.
3006 number), name);
3007 release_sub_crqs(adapter);
3008 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3009 ibmvnic_send_req_caps(adapter, 1);
3010 return;
3011 default:
3012 dev_err(dev, "Error %d in request cap rsp\n",
3013 crq->request_capability_rsp.rc.code);
3014 return;
3015 }
3016
3017 /* Done receiving requested capabilities, query IP offload support */
3018 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3019 union ibmvnic_crq newcrq;
3020 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3021 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3022 &adapter->ip_offload_buf;
3023
3024 adapter->wait_capability = false;
3025 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3026 buf_sz,
3027 DMA_FROM_DEVICE);
3028
3029 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3030 if (!firmware_has_feature(FW_FEATURE_CMO))
3031 dev_err(dev, "Couldn't map offload buffer\n");
3032 return;
3033 }
3034
3035 memset(&newcrq, 0, sizeof(newcrq));
3036 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3037 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3038 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3039 newcrq.query_ip_offload.ioba =
3040 cpu_to_be32(adapter->ip_offload_tok);
3041
3042 ibmvnic_send_crq(adapter, &newcrq);
3043 }
3044 }
3045
3046 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3047 struct ibmvnic_adapter *adapter)
3048 {
3049 struct device *dev = &adapter->vdev->dev;
3050 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3051 struct ibmvnic_login_buffer *login = adapter->login_buf;
3052 int i;
3053
3054 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3055 DMA_BIDIRECTIONAL);
3056 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3057 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3058
3059 /* If the number of queues requested can't be allocated by the
3060 * server, the login response will return with code 1. We will need
3061 * to resend the login buffer with fewer queues requested.
3062 */
3063 if (login_rsp_crq->generic.rc.code) {
3064 adapter->renegotiate = true;
3065 complete(&adapter->init_done);
3066 return 0;
3067 }
3068
3069 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3070 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3071 netdev_dbg(adapter->netdev, "%016lx\n",
3072 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3073 }
3074
3075 /* Sanity checks */
3076 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3077 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3078 adapter->req_rx_add_queues !=
3079 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3080 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3081 ibmvnic_remove(adapter->vdev);
3082 return -EIO;
3083 }
3084 complete(&adapter->init_done);
3085
3086 return 0;
3087 }
3088
3089 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3090 struct ibmvnic_adapter *adapter)
3091 {
3092 struct device *dev = &adapter->vdev->dev;
3093 long rc;
3094
3095 rc = crq->request_unmap_rsp.rc.code;
3096 if (rc)
3097 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3098 }
3099
3100 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3101 struct ibmvnic_adapter *adapter)
3102 {
3103 struct net_device *netdev = adapter->netdev;
3104 struct device *dev = &adapter->vdev->dev;
3105 long rc;
3106
3107 rc = crq->query_map_rsp.rc.code;
3108 if (rc) {
3109 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3110 return;
3111 }
3112 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3113 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3114 crq->query_map_rsp.free_pages);
3115 }
3116
3117 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3118 struct ibmvnic_adapter *adapter)
3119 {
3120 struct net_device *netdev = adapter->netdev;
3121 struct device *dev = &adapter->vdev->dev;
3122 long rc;
3123
3124 atomic_dec(&adapter->running_cap_crqs);
3125 netdev_dbg(netdev, "Outstanding queries: %d\n",
3126 atomic_read(&adapter->running_cap_crqs));
3127 rc = crq->query_capability.rc.code;
3128 if (rc) {
3129 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3130 goto out;
3131 }
3132
3133 switch (be16_to_cpu(crq->query_capability.capability)) {
3134 case MIN_TX_QUEUES:
3135 adapter->min_tx_queues =
3136 be64_to_cpu(crq->query_capability.number);
3137 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3138 adapter->min_tx_queues);
3139 break;
3140 case MIN_RX_QUEUES:
3141 adapter->min_rx_queues =
3142 be64_to_cpu(crq->query_capability.number);
3143 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3144 adapter->min_rx_queues);
3145 break;
3146 case MIN_RX_ADD_QUEUES:
3147 adapter->min_rx_add_queues =
3148 be64_to_cpu(crq->query_capability.number);
3149 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3150 adapter->min_rx_add_queues);
3151 break;
3152 case MAX_TX_QUEUES:
3153 adapter->max_tx_queues =
3154 be64_to_cpu(crq->query_capability.number);
3155 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3156 adapter->max_tx_queues);
3157 break;
3158 case MAX_RX_QUEUES:
3159 adapter->max_rx_queues =
3160 be64_to_cpu(crq->query_capability.number);
3161 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3162 adapter->max_rx_queues);
3163 break;
3164 case MAX_RX_ADD_QUEUES:
3165 adapter->max_rx_add_queues =
3166 be64_to_cpu(crq->query_capability.number);
3167 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3168 adapter->max_rx_add_queues);
3169 break;
3170 case MIN_TX_ENTRIES_PER_SUBCRQ:
3171 adapter->min_tx_entries_per_subcrq =
3172 be64_to_cpu(crq->query_capability.number);
3173 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3174 adapter->min_tx_entries_per_subcrq);
3175 break;
3176 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3177 adapter->min_rx_add_entries_per_subcrq =
3178 be64_to_cpu(crq->query_capability.number);
3179 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3180 adapter->min_rx_add_entries_per_subcrq);
3181 break;
3182 case MAX_TX_ENTRIES_PER_SUBCRQ:
3183 adapter->max_tx_entries_per_subcrq =
3184 be64_to_cpu(crq->query_capability.number);
3185 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3186 adapter->max_tx_entries_per_subcrq);
3187 break;
3188 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3189 adapter->max_rx_add_entries_per_subcrq =
3190 be64_to_cpu(crq->query_capability.number);
3191 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3192 adapter->max_rx_add_entries_per_subcrq);
3193 break;
3194 case TCP_IP_OFFLOAD:
3195 adapter->tcp_ip_offload =
3196 be64_to_cpu(crq->query_capability.number);
3197 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3198 adapter->tcp_ip_offload);
3199 break;
3200 case PROMISC_SUPPORTED:
3201 adapter->promisc_supported =
3202 be64_to_cpu(crq->query_capability.number);
3203 netdev_dbg(netdev, "promisc_supported = %lld\n",
3204 adapter->promisc_supported);
3205 break;
3206 case MIN_MTU:
3207 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3208 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3209 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3210 break;
3211 case MAX_MTU:
3212 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3213 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3214 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3215 break;
3216 case MAX_MULTICAST_FILTERS:
3217 adapter->max_multicast_filters =
3218 be64_to_cpu(crq->query_capability.number);
3219 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3220 adapter->max_multicast_filters);
3221 break;
3222 case VLAN_HEADER_INSERTION:
3223 adapter->vlan_header_insertion =
3224 be64_to_cpu(crq->query_capability.number);
3225 if (adapter->vlan_header_insertion)
3226 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3227 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3228 adapter->vlan_header_insertion);
3229 break;
3230 case RX_VLAN_HEADER_INSERTION:
3231 adapter->rx_vlan_header_insertion =
3232 be64_to_cpu(crq->query_capability.number);
3233 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3234 adapter->rx_vlan_header_insertion);
3235 break;
3236 case MAX_TX_SG_ENTRIES:
3237 adapter->max_tx_sg_entries =
3238 be64_to_cpu(crq->query_capability.number);
3239 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3240 adapter->max_tx_sg_entries);
3241 break;
3242 case RX_SG_SUPPORTED:
3243 adapter->rx_sg_supported =
3244 be64_to_cpu(crq->query_capability.number);
3245 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3246 adapter->rx_sg_supported);
3247 break;
3248 case OPT_TX_COMP_SUB_QUEUES:
3249 adapter->opt_tx_comp_sub_queues =
3250 be64_to_cpu(crq->query_capability.number);
3251 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3252 adapter->opt_tx_comp_sub_queues);
3253 break;
3254 case OPT_RX_COMP_QUEUES:
3255 adapter->opt_rx_comp_queues =
3256 be64_to_cpu(crq->query_capability.number);
3257 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3258 adapter->opt_rx_comp_queues);
3259 break;
3260 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3261 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3262 be64_to_cpu(crq->query_capability.number);
3263 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3264 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3265 break;
3266 case OPT_TX_ENTRIES_PER_SUBCRQ:
3267 adapter->opt_tx_entries_per_subcrq =
3268 be64_to_cpu(crq->query_capability.number);
3269 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3270 adapter->opt_tx_entries_per_subcrq);
3271 break;
3272 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3273 adapter->opt_rxba_entries_per_subcrq =
3274 be64_to_cpu(crq->query_capability.number);
3275 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3276 adapter->opt_rxba_entries_per_subcrq);
3277 break;
3278 case TX_RX_DESC_REQ:
3279 adapter->tx_rx_desc_req = crq->query_capability.number;
3280 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3281 adapter->tx_rx_desc_req);
3282 break;
3283
3284 default:
3285 netdev_err(netdev, "Got invalid cap rsp %d\n",
3286 crq->query_capability.capability);
3287 }
3288
3289 out:
3290 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3291 adapter->wait_capability = false;
3292 ibmvnic_send_req_caps(adapter, 0);
3293 }
3294 }
3295
3296 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3297 struct ibmvnic_adapter *adapter)
3298 {
3299 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3300 struct net_device *netdev = adapter->netdev;
3301 struct device *dev = &adapter->vdev->dev;
3302 u64 *u64_crq = (u64 *)crq;
3303 long rc;
3304
3305 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3306 (unsigned long int)cpu_to_be64(u64_crq[0]),
3307 (unsigned long int)cpu_to_be64(u64_crq[1]));
3308 switch (gen_crq->first) {
3309 case IBMVNIC_CRQ_INIT_RSP:
3310 switch (gen_crq->cmd) {
3311 case IBMVNIC_CRQ_INIT:
3312 dev_info(dev, "Partner initialized\n");
3313 adapter->from_passive_init = true;
3314 complete(&adapter->init_done);
3315 break;
3316 case IBMVNIC_CRQ_INIT_COMPLETE:
3317 dev_info(dev, "Partner initialization complete\n");
3318 send_version_xchg(adapter);
3319 break;
3320 default:
3321 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3322 }
3323 return;
3324 case IBMVNIC_CRQ_XPORT_EVENT:
3325 netif_carrier_off(netdev);
3326 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3327 dev_info(dev, "Migrated, re-enabling adapter\n");
3328 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3329 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3330 dev_info(dev, "Backing device failover detected\n");
3331 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3332 } else {
3333 /* The adapter lost the connection */
3334 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3335 gen_crq->cmd);
3336 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3337 }
3338 return;
3339 case IBMVNIC_CRQ_CMD_RSP:
3340 break;
3341 default:
3342 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3343 gen_crq->first);
3344 return;
3345 }
3346
3347 switch (gen_crq->cmd) {
3348 case VERSION_EXCHANGE_RSP:
3349 rc = crq->version_exchange_rsp.rc.code;
3350 if (rc) {
3351 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3352 break;
3353 }
3354 dev_info(dev, "Partner protocol version is %d\n",
3355 crq->version_exchange_rsp.version);
3356 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3357 ibmvnic_version)
3358 ibmvnic_version =
3359 be16_to_cpu(crq->version_exchange_rsp.version);
3360 send_cap_queries(adapter);
3361 break;
3362 case QUERY_CAPABILITY_RSP:
3363 handle_query_cap_rsp(crq, adapter);
3364 break;
3365 case QUERY_MAP_RSP:
3366 handle_query_map_rsp(crq, adapter);
3367 break;
3368 case REQUEST_MAP_RSP:
3369 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3370 complete(&adapter->fw_done);
3371 break;
3372 case REQUEST_UNMAP_RSP:
3373 handle_request_unmap_rsp(crq, adapter);
3374 break;
3375 case REQUEST_CAPABILITY_RSP:
3376 handle_request_cap_rsp(crq, adapter);
3377 break;
3378 case LOGIN_RSP:
3379 netdev_dbg(netdev, "Got Login Response\n");
3380 handle_login_rsp(crq, adapter);
3381 break;
3382 case LOGICAL_LINK_STATE_RSP:
3383 netdev_dbg(netdev,
3384 "Got Logical Link State Response, state: %d rc: %d\n",
3385 crq->logical_link_state_rsp.link_state,
3386 crq->logical_link_state_rsp.rc.code);
3387 adapter->logical_link_state =
3388 crq->logical_link_state_rsp.link_state;
3389 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3390 complete(&adapter->init_done);
3391 break;
3392 case LINK_STATE_INDICATION:
3393 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3394 adapter->phys_link_state =
3395 crq->link_state_indication.phys_link_state;
3396 adapter->logical_link_state =
3397 crq->link_state_indication.logical_link_state;
3398 break;
3399 case CHANGE_MAC_ADDR_RSP:
3400 netdev_dbg(netdev, "Got MAC address change Response\n");
3401 handle_change_mac_rsp(crq, adapter);
3402 break;
3403 case ERROR_INDICATION:
3404 netdev_dbg(netdev, "Got Error Indication\n");
3405 handle_error_indication(crq, adapter);
3406 break;
3407 case REQUEST_ERROR_RSP:
3408 netdev_dbg(netdev, "Got Error Detail Response\n");
3409 handle_error_info_rsp(crq, adapter);
3410 break;
3411 case REQUEST_STATISTICS_RSP:
3412 netdev_dbg(netdev, "Got Statistics Response\n");
3413 complete(&adapter->stats_done);
3414 break;
3415 case QUERY_IP_OFFLOAD_RSP:
3416 netdev_dbg(netdev, "Got Query IP offload Response\n");
3417 handle_query_ip_offload_rsp(adapter);
3418 break;
3419 case MULTICAST_CTRL_RSP:
3420 netdev_dbg(netdev, "Got multicast control Response\n");
3421 break;
3422 case CONTROL_IP_OFFLOAD_RSP:
3423 netdev_dbg(netdev, "Got Control IP offload Response\n");
3424 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3425 sizeof(adapter->ip_offload_ctrl),
3426 DMA_TO_DEVICE);
3427 complete(&adapter->init_done);
3428 break;
3429 case COLLECT_FW_TRACE_RSP:
3430 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3431 complete(&adapter->fw_done);
3432 break;
3433 default:
3434 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3435 gen_crq->cmd);
3436 }
3437 }
3438
3439 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3440 {
3441 struct ibmvnic_adapter *adapter = instance;
3442
3443 tasklet_schedule(&adapter->tasklet);
3444 return IRQ_HANDLED;
3445 }
3446
3447 static void ibmvnic_tasklet(void *data)
3448 {
3449 struct ibmvnic_adapter *adapter = data;
3450 struct ibmvnic_crq_queue *queue = &adapter->crq;
3451 union ibmvnic_crq *crq;
3452 unsigned long flags;
3453 bool done = false;
3454
3455 spin_lock_irqsave(&queue->lock, flags);
3456 while (!done) {
3457 /* Pull all the valid messages off the CRQ */
3458 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3459 ibmvnic_handle_crq(crq, adapter);
3460 crq->generic.first = 0;
3461 }
3462
3463 /* remain in tasklet until all
3464 * capabilities responses are received
3465 */
3466 if (!adapter->wait_capability)
3467 done = true;
3468 }
3469 /* if capabilities CRQ's were sent in this tasklet, the following
3470 * tasklet must wait until all responses are received
3471 */
3472 if (atomic_read(&adapter->running_cap_crqs) != 0)
3473 adapter->wait_capability = true;
3474 spin_unlock_irqrestore(&queue->lock, flags);
3475 }
3476
3477 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3478 {
3479 struct vio_dev *vdev = adapter->vdev;
3480 int rc;
3481
3482 do {
3483 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3484 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3485
3486 if (rc)
3487 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3488
3489 return rc;
3490 }
3491
3492 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3493 {
3494 struct ibmvnic_crq_queue *crq = &adapter->crq;
3495 struct device *dev = &adapter->vdev->dev;
3496 struct vio_dev *vdev = adapter->vdev;
3497 int rc;
3498
3499 /* Close the CRQ */
3500 do {
3501 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3502 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3503
3504 /* Clean out the queue */
3505 memset(crq->msgs, 0, PAGE_SIZE);
3506 crq->cur = 0;
3507
3508 /* And re-open it again */
3509 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3510 crq->msg_token, PAGE_SIZE);
3511
3512 if (rc == H_CLOSED)
3513 /* Adapter is good, but other end is not ready */
3514 dev_warn(dev, "Partner adapter not ready\n");
3515 else if (rc != 0)
3516 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3517
3518 return rc;
3519 }
3520
3521 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3522 {
3523 struct ibmvnic_crq_queue *crq = &adapter->crq;
3524 struct vio_dev *vdev = adapter->vdev;
3525 long rc;
3526
3527 if (!crq->msgs)
3528 return;
3529
3530 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3531 free_irq(vdev->irq, adapter);
3532 tasklet_kill(&adapter->tasklet);
3533 do {
3534 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3535 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3536
3537 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3538 DMA_BIDIRECTIONAL);
3539 free_page((unsigned long)crq->msgs);
3540 crq->msgs = NULL;
3541 }
3542
3543 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3544 {
3545 struct ibmvnic_crq_queue *crq = &adapter->crq;
3546 struct device *dev = &adapter->vdev->dev;
3547 struct vio_dev *vdev = adapter->vdev;
3548 int rc, retrc = -ENOMEM;
3549
3550 if (crq->msgs)
3551 return 0;
3552
3553 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3554 /* Should we allocate more than one page? */
3555
3556 if (!crq->msgs)
3557 return -ENOMEM;
3558
3559 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3560 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3561 DMA_BIDIRECTIONAL);
3562 if (dma_mapping_error(dev, crq->msg_token))
3563 goto map_failed;
3564
3565 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3566 crq->msg_token, PAGE_SIZE);
3567
3568 if (rc == H_RESOURCE)
3569 /* maybe kexecing and resource is busy. try a reset */
3570 rc = ibmvnic_reset_crq(adapter);
3571 retrc = rc;
3572
3573 if (rc == H_CLOSED) {
3574 dev_warn(dev, "Partner adapter not ready\n");
3575 } else if (rc) {
3576 dev_warn(dev, "Error %d opening adapter\n", rc);
3577 goto reg_crq_failed;
3578 }
3579
3580 retrc = 0;
3581
3582 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3583 (unsigned long)adapter);
3584
3585 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3586 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3587 adapter);
3588 if (rc) {
3589 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3590 vdev->irq, rc);
3591 goto req_irq_failed;
3592 }
3593
3594 rc = vio_enable_interrupts(vdev);
3595 if (rc) {
3596 dev_err(dev, "Error %d enabling interrupts\n", rc);
3597 goto req_irq_failed;
3598 }
3599
3600 crq->cur = 0;
3601 spin_lock_init(&crq->lock);
3602
3603 return retrc;
3604
3605 req_irq_failed:
3606 tasklet_kill(&adapter->tasklet);
3607 do {
3608 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3609 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3610 reg_crq_failed:
3611 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3612 map_failed:
3613 free_page((unsigned long)crq->msgs);
3614 crq->msgs = NULL;
3615 return retrc;
3616 }
3617
3618 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3619 {
3620 struct device *dev = &adapter->vdev->dev;
3621 unsigned long timeout = msecs_to_jiffies(30000);
3622 int rc;
3623
3624 if (adapter->resetting) {
3625 rc = ibmvnic_reset_crq(adapter);
3626 if (!rc)
3627 rc = vio_enable_interrupts(adapter->vdev);
3628 } else {
3629 rc = init_crq_queue(adapter);
3630 }
3631
3632 if (rc) {
3633 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3634 return rc;
3635 }
3636
3637 adapter->from_passive_init = false;
3638
3639 init_completion(&adapter->init_done);
3640 adapter->init_done_rc = 0;
3641 ibmvnic_send_crq_init(adapter);
3642 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3643 dev_err(dev, "Initialization sequence timed out\n");
3644 return -1;
3645 }
3646
3647 if (adapter->init_done_rc) {
3648 release_crq_queue(adapter);
3649 return adapter->init_done_rc;
3650 }
3651
3652 if (adapter->from_passive_init) {
3653 adapter->state = VNIC_OPEN;
3654 adapter->from_passive_init = false;
3655 return -1;
3656 }
3657
3658 if (adapter->resetting)
3659 rc = reset_sub_crq_queues(adapter);
3660 else
3661 rc = init_sub_crqs(adapter);
3662 if (rc) {
3663 dev_err(dev, "Initialization of sub crqs failed\n");
3664 release_crq_queue(adapter);
3665 return rc;
3666 }
3667
3668 rc = init_sub_crq_irqs(adapter);
3669 if (rc) {
3670 dev_err(dev, "Failed to initialize sub crq irqs\n");
3671 release_crq_queue(adapter);
3672 }
3673
3674 return rc;
3675 }
3676
3677 static struct device_attribute dev_attr_failover;
3678
3679 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3680 {
3681 struct ibmvnic_adapter *adapter;
3682 struct net_device *netdev;
3683 unsigned char *mac_addr_p;
3684 int rc;
3685
3686 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3687 dev->unit_address);
3688
3689 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3690 VETH_MAC_ADDR, NULL);
3691 if (!mac_addr_p) {
3692 dev_err(&dev->dev,
3693 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3694 __FILE__, __LINE__);
3695 return 0;
3696 }
3697
3698 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3699 IBMVNIC_MAX_TX_QUEUES);
3700 if (!netdev)
3701 return -ENOMEM;
3702
3703 adapter = netdev_priv(netdev);
3704 adapter->state = VNIC_PROBING;
3705 dev_set_drvdata(&dev->dev, netdev);
3706 adapter->vdev = dev;
3707 adapter->netdev = netdev;
3708
3709 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3710 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3711 netdev->irq = dev->irq;
3712 netdev->netdev_ops = &ibmvnic_netdev_ops;
3713 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3714 SET_NETDEV_DEV(netdev, &dev->dev);
3715
3716 spin_lock_init(&adapter->stats_lock);
3717
3718 INIT_LIST_HEAD(&adapter->errors);
3719 spin_lock_init(&adapter->error_list_lock);
3720
3721 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3722 INIT_LIST_HEAD(&adapter->rwi_list);
3723 mutex_init(&adapter->reset_lock);
3724 mutex_init(&adapter->rwi_lock);
3725 adapter->resetting = false;
3726
3727 do {
3728 rc = ibmvnic_init(adapter);
3729 if (rc && rc != EAGAIN) {
3730 free_netdev(netdev);
3731 return rc;
3732 }
3733 } while (rc == EAGAIN);
3734
3735 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3736
3737 rc = device_create_file(&dev->dev, &dev_attr_failover);
3738 if (rc) {
3739 free_netdev(netdev);
3740 return rc;
3741 }
3742
3743 rc = register_netdev(netdev);
3744 if (rc) {
3745 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3746 device_remove_file(&dev->dev, &dev_attr_failover);
3747 free_netdev(netdev);
3748 return rc;
3749 }
3750 dev_info(&dev->dev, "ibmvnic registered\n");
3751
3752 adapter->state = VNIC_PROBED;
3753 return 0;
3754 }
3755
3756 static int ibmvnic_remove(struct vio_dev *dev)
3757 {
3758 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3759 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3760
3761 adapter->state = VNIC_REMOVING;
3762 unregister_netdev(netdev);
3763 mutex_lock(&adapter->reset_lock);
3764
3765 release_resources(adapter);
3766 release_sub_crqs(adapter);
3767 release_crq_queue(adapter);
3768
3769 adapter->state = VNIC_REMOVED;
3770
3771 mutex_unlock(&adapter->reset_lock);
3772 device_remove_file(&dev->dev, &dev_attr_failover);
3773 free_netdev(netdev);
3774 dev_set_drvdata(&dev->dev, NULL);
3775
3776 return 0;
3777 }
3778
3779 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3780 const char *buf, size_t count)
3781 {
3782 struct net_device *netdev = dev_get_drvdata(dev);
3783 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3784 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3785 __be64 session_token;
3786 long rc;
3787
3788 if (!sysfs_streq(buf, "1"))
3789 return -EINVAL;
3790
3791 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3792 H_GET_SESSION_TOKEN, 0, 0, 0);
3793 if (rc) {
3794 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3795 rc);
3796 return -EINVAL;
3797 }
3798
3799 session_token = (__be64)retbuf[0];
3800 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3801 be64_to_cpu(session_token));
3802 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3803 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3804 if (rc) {
3805 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3806 rc);
3807 return -EINVAL;
3808 }
3809
3810 return count;
3811 }
3812
3813 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3814
3815 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3816 {
3817 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3818 struct ibmvnic_adapter *adapter;
3819 struct iommu_table *tbl;
3820 unsigned long ret = 0;
3821 int i;
3822
3823 tbl = get_iommu_table_base(&vdev->dev);
3824
3825 /* netdev inits at probe time along with the structures we need below*/
3826 if (!netdev)
3827 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3828
3829 adapter = netdev_priv(netdev);
3830
3831 ret += PAGE_SIZE; /* the crq message queue */
3832 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3833
3834 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3835 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3836
3837 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3838 i++)
3839 ret += adapter->rx_pool[i].size *
3840 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3841
3842 return ret;
3843 }
3844
3845 static int ibmvnic_resume(struct device *dev)
3846 {
3847 struct net_device *netdev = dev_get_drvdata(dev);
3848 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3849 int i;
3850
3851 if (adapter->state != VNIC_OPEN)
3852 return 0;
3853
3854 /* kick the interrupt handlers just in case we lost an interrupt */
3855 for (i = 0; i < adapter->req_rx_queues; i++)
3856 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3857 adapter->rx_scrq[i]);
3858
3859 return 0;
3860 }
3861
3862 static struct vio_device_id ibmvnic_device_table[] = {
3863 {"network", "IBM,vnic"},
3864 {"", "" }
3865 };
3866 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3867
3868 static const struct dev_pm_ops ibmvnic_pm_ops = {
3869 .resume = ibmvnic_resume
3870 };
3871
3872 static struct vio_driver ibmvnic_driver = {
3873 .id_table = ibmvnic_device_table,
3874 .probe = ibmvnic_probe,
3875 .remove = ibmvnic_remove,
3876 .get_desired_dma = ibmvnic_get_desired_dma,
3877 .name = ibmvnic_driver_name,
3878 .pm = &ibmvnic_pm_ops,
3879 };
3880
3881 /* module functions */
3882 static int __init ibmvnic_module_init(void)
3883 {
3884 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3885 IBMVNIC_DRIVER_VERSION);
3886
3887 return vio_register_driver(&ibmvnic_driver);
3888 }
3889
3890 static void __exit ibmvnic_module_exit(void)
3891 {
3892 vio_unregister_driver(&ibmvnic_driver);
3893 }
3894
3895 module_init(ibmvnic_module_init);
3896 module_exit(ibmvnic_module_exit);
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