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staging: rtl8188eu: Replace function name in string with __func__
[linux/fpc-iii.git] / drivers / net / ethernet / ibm / ibmvnic.c
blob27447260215d1bb36a9d0cd5540efadf52514cb6
1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/if_arp.h>
63 #include <linux/in.h>
64 #include <linux/ip.h>
65 #include <linux/ipv6.h>
66 #include <linux/irq.h>
67 #include <linux/kthread.h>
68 #include <linux/seq_file.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
73 #include <asm/vio.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/workqueue.h>
78 #include <linux/if_vlan.h>
79 #include <linux/utsname.h>
80
81 #include "ibmvnic.h"
82
83 static const char ibmvnic_driver_name[] = "ibmvnic";
84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
85
86 MODULE_AUTHOR("Santiago Leon");
87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
90
91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92 static int ibmvnic_remove(struct vio_dev *);
93 static void release_sub_crqs(struct ibmvnic_adapter *);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
114 static void send_login(struct ibmvnic_adapter *adapter);
115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
116 static int init_sub_crqs(struct ibmvnic_adapter *);
117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118 static int ibmvnic_init(struct ibmvnic_adapter *);
119 static void release_crq_queue(struct ibmvnic_adapter *);
120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
121
122 struct ibmvnic_stat {
123 char name[ETH_GSTRING_LEN];
124 int offset;
125 };
126
127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
128 offsetof(struct ibmvnic_statistics, stat))
129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
130
131 static const struct ibmvnic_stat ibmvnic_stats[] = {
132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
154 };
155
156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
157 unsigned long length, unsigned long *number,
158 unsigned long *irq)
159 {
160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
161 long rc;
162
163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
164 *number = retbuf[0];
165 *irq = retbuf[1];
166
167 return rc;
168 }
169
170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
171 struct ibmvnic_long_term_buff *ltb, int size)
172 {
173 struct device *dev = &adapter->vdev->dev;
174
175 ltb->size = size;
176 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
177 GFP_KERNEL);
178
179 if (!ltb->buff) {
180 dev_err(dev, "Couldn't alloc long term buffer\n");
181 return -ENOMEM;
182 }
183 ltb->map_id = adapter->map_id;
184 adapter->map_id++;
185
186 init_completion(&adapter->fw_done);
187 send_request_map(adapter, ltb->addr,
188 ltb->size, ltb->map_id);
189 wait_for_completion(&adapter->fw_done);
190
191 if (adapter->fw_done_rc) {
192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
193 adapter->fw_done_rc);
194 return -1;
195 }
196 return 0;
197 }
198
199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
201 {
202 struct device *dev = &adapter->vdev->dev;
203
204 if (!ltb->buff)
205 return;
206
207 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
208 adapter->reset_reason != VNIC_RESET_MOBILITY)
209 send_request_unmap(adapter, ltb->map_id);
210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
211 }
212
213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
214 struct ibmvnic_long_term_buff *ltb)
215 {
216 memset(ltb->buff, 0, ltb->size);
217
218 init_completion(&adapter->fw_done);
219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
220 wait_for_completion(&adapter->fw_done);
221
222 if (adapter->fw_done_rc) {
223 dev_info(&adapter->vdev->dev,
224 "Reset failed, attempting to free and reallocate buffer\n");
225 free_long_term_buff(adapter, ltb);
226 return alloc_long_term_buff(adapter, ltb, ltb->size);
227 }
228 return 0;
229 }
230
231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
232 {
233 int i;
234
235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
236 i++)
237 adapter->rx_pool[i].active = 0;
238 }
239
240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
241 struct ibmvnic_rx_pool *pool)
242 {
243 int count = pool->size - atomic_read(&pool->available);
244 struct device *dev = &adapter->vdev->dev;
245 int buffers_added = 0;
246 unsigned long lpar_rc;
247 union sub_crq sub_crq;
248 struct sk_buff *skb;
249 unsigned int offset;
250 dma_addr_t dma_addr;
251 unsigned char *dst;
252 u64 *handle_array;
253 int shift = 0;
254 int index;
255 int i;
256
257 if (!pool->active)
258 return;
259
260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
261 be32_to_cpu(adapter->login_rsp_buf->
262 off_rxadd_subcrqs));
263
264 for (i = 0; i < count; ++i) {
265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
266 if (!skb) {
267 dev_err(dev, "Couldn't replenish rx buff\n");
268 adapter->replenish_no_mem++;
269 break;
270 }
271
272 index = pool->free_map[pool->next_free];
273
274 if (pool->rx_buff[index].skb)
275 dev_err(dev, "Inconsistent free_map!\n");
276
277 /* Copy the skb to the long term mapped DMA buffer */
278 offset = index * pool->buff_size;
279 dst = pool->long_term_buff.buff + offset;
280 memset(dst, 0, pool->buff_size);
281 dma_addr = pool->long_term_buff.addr + offset;
282 pool->rx_buff[index].data = dst;
283
284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
285 pool->rx_buff[index].dma = dma_addr;
286 pool->rx_buff[index].skb = skb;
287 pool->rx_buff[index].pool_index = pool->index;
288 pool->rx_buff[index].size = pool->buff_size;
289
290 memset(&sub_crq, 0, sizeof(sub_crq));
291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
292 sub_crq.rx_add.correlator =
293 cpu_to_be64((u64)&pool->rx_buff[index]);
294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
296
297 /* The length field of the sCRQ is defined to be 24 bits so the
298 * buffer size needs to be left shifted by a byte before it is
299 * converted to big endian to prevent the last byte from being
300 * truncated.
301 */
302 #ifdef __LITTLE_ENDIAN__
303 shift = 8;
304 #endif
305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
306
307 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
308 &sub_crq);
309 if (lpar_rc != H_SUCCESS)
310 goto failure;
311
312 buffers_added++;
313 adapter->replenish_add_buff_success++;
314 pool->next_free = (pool->next_free + 1) % pool->size;
315 }
316 atomic_add(buffers_added, &pool->available);
317 return;
318
319 failure:
320 dev_info(dev, "replenish pools failure\n");
321 pool->free_map[pool->next_free] = index;
322 pool->rx_buff[index].skb = NULL;
323 if (!dma_mapping_error(dev, dma_addr))
324 dma_unmap_single(dev, dma_addr, pool->buff_size,
325 DMA_FROM_DEVICE);
326
327 dev_kfree_skb_any(skb);
328 adapter->replenish_add_buff_failure++;
329 atomic_add(buffers_added, &pool->available);
330
331 if (lpar_rc == H_CLOSED) {
332 /* Disable buffer pool replenishment and report carrier off if
333 * queue is closed. Firmware guarantees that a signal will
334 * be sent to the driver, triggering a reset.
335 */
336 deactivate_rx_pools(adapter);
337 netif_carrier_off(adapter->netdev);
338 }
339 }
340
341 static void replenish_pools(struct ibmvnic_adapter *adapter)
342 {
343 int i;
344
345 adapter->replenish_task_cycles++;
346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
347 i++) {
348 if (adapter->rx_pool[i].active)
349 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 }
351 }
352
353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
354 {
355 kfree(adapter->tx_stats_buffers);
356 kfree(adapter->rx_stats_buffers);
357 adapter->tx_stats_buffers = NULL;
358 adapter->rx_stats_buffers = NULL;
359 }
360
361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
362 {
363 adapter->tx_stats_buffers =
364 kcalloc(adapter->req_tx_queues,
365 sizeof(struct ibmvnic_tx_queue_stats),
366 GFP_KERNEL);
367 if (!adapter->tx_stats_buffers)
368 return -ENOMEM;
369
370 adapter->rx_stats_buffers =
371 kcalloc(adapter->req_rx_queues,
372 sizeof(struct ibmvnic_rx_queue_stats),
373 GFP_KERNEL);
374 if (!adapter->rx_stats_buffers)
375 return -ENOMEM;
376
377 return 0;
378 }
379
380 static void release_stats_token(struct ibmvnic_adapter *adapter)
381 {
382 struct device *dev = &adapter->vdev->dev;
383
384 if (!adapter->stats_token)
385 return;
386
387 dma_unmap_single(dev, adapter->stats_token,
388 sizeof(struct ibmvnic_statistics),
389 DMA_FROM_DEVICE);
390 adapter->stats_token = 0;
391 }
392
393 static int init_stats_token(struct ibmvnic_adapter *adapter)
394 {
395 struct device *dev = &adapter->vdev->dev;
396 dma_addr_t stok;
397
398 stok = dma_map_single(dev, &adapter->stats,
399 sizeof(struct ibmvnic_statistics),
400 DMA_FROM_DEVICE);
401 if (dma_mapping_error(dev, stok)) {
402 dev_err(dev, "Couldn't map stats buffer\n");
403 return -1;
404 }
405
406 adapter->stats_token = stok;
407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
408 return 0;
409 }
410
411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
412 {
413 struct ibmvnic_rx_pool *rx_pool;
414 int rx_scrqs;
415 int i, j, rc;
416 u64 *size_array;
417
418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
420
421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
422 for (i = 0; i < rx_scrqs; i++) {
423 rx_pool = &adapter->rx_pool[i];
424
425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
426
427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
428 free_long_term_buff(adapter, &rx_pool->long_term_buff);
429 rx_pool->buff_size = be64_to_cpu(size_array[i]);
430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
431 rx_pool->size *
432 rx_pool->buff_size);
433 } else {
434 rc = reset_long_term_buff(adapter,
435 &rx_pool->long_term_buff);
436 }
437
438 if (rc)
439 return rc;
440
441 for (j = 0; j < rx_pool->size; j++)
442 rx_pool->free_map[j] = j;
443
444 memset(rx_pool->rx_buff, 0,
445 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
446
447 atomic_set(&rx_pool->available, 0);
448 rx_pool->next_alloc = 0;
449 rx_pool->next_free = 0;
450 rx_pool->active = 1;
451 }
452
453 return 0;
454 }
455
456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
457 {
458 struct ibmvnic_rx_pool *rx_pool;
459 int i, j;
460
461 if (!adapter->rx_pool)
462 return;
463
464 for (i = 0; i < adapter->num_active_rx_pools; i++) {
465 rx_pool = &adapter->rx_pool[i];
466
467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
468
469 kfree(rx_pool->free_map);
470 free_long_term_buff(adapter, &rx_pool->long_term_buff);
471
472 if (!rx_pool->rx_buff)
473 continue;
474
475 for (j = 0; j < rx_pool->size; j++) {
476 if (rx_pool->rx_buff[j].skb) {
477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
478 rx_pool->rx_buff[i].skb = NULL;
479 }
480 }
481
482 kfree(rx_pool->rx_buff);
483 }
484
485 kfree(adapter->rx_pool);
486 adapter->rx_pool = NULL;
487 adapter->num_active_rx_pools = 0;
488 }
489
490 static int init_rx_pools(struct net_device *netdev)
491 {
492 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
493 struct device *dev = &adapter->vdev->dev;
494 struct ibmvnic_rx_pool *rx_pool;
495 int rxadd_subcrqs;
496 u64 *size_array;
497 int i, j;
498
499 rxadd_subcrqs =
500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
503
504 adapter->rx_pool = kcalloc(rxadd_subcrqs,
505 sizeof(struct ibmvnic_rx_pool),
506 GFP_KERNEL);
507 if (!adapter->rx_pool) {
508 dev_err(dev, "Failed to allocate rx pools\n");
509 return -1;
510 }
511
512 adapter->num_active_rx_pools = 0;
513
514 for (i = 0; i < rxadd_subcrqs; i++) {
515 rx_pool = &adapter->rx_pool[i];
516
517 netdev_dbg(adapter->netdev,
518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
519 i, adapter->req_rx_add_entries_per_subcrq,
520 be64_to_cpu(size_array[i]));
521
522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
523 rx_pool->index = i;
524 rx_pool->buff_size = be64_to_cpu(size_array[i]);
525 rx_pool->active = 1;
526
527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
528 GFP_KERNEL);
529 if (!rx_pool->free_map) {
530 release_rx_pools(adapter);
531 return -1;
532 }
533
534 rx_pool->rx_buff = kcalloc(rx_pool->size,
535 sizeof(struct ibmvnic_rx_buff),
536 GFP_KERNEL);
537 if (!rx_pool->rx_buff) {
538 dev_err(dev, "Couldn't alloc rx buffers\n");
539 release_rx_pools(adapter);
540 return -1;
541 }
542
543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
544 rx_pool->size * rx_pool->buff_size)) {
545 release_rx_pools(adapter);
546 return -1;
547 }
548
549 for (j = 0; j < rx_pool->size; ++j)
550 rx_pool->free_map[j] = j;
551
552 atomic_set(&rx_pool->available, 0);
553 rx_pool->next_alloc = 0;
554 rx_pool->next_free = 0;
555 }
556
557 adapter->num_active_rx_pools = rxadd_subcrqs;
558
559 return 0;
560 }
561
562 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
563 {
564 struct ibmvnic_tx_pool *tx_pool;
565 int tx_scrqs;
566 int i, j, rc;
567
568 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
569 for (i = 0; i < tx_scrqs; i++) {
570 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
571
572 tx_pool = &adapter->tx_pool[i];
573
574 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
575 if (rc)
576 return rc;
577
578 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
579 if (rc)
580 return rc;
581
582 memset(tx_pool->tx_buff, 0,
583 adapter->req_tx_entries_per_subcrq *
584 sizeof(struct ibmvnic_tx_buff));
585
586 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
587 tx_pool->free_map[j] = j;
588
589 tx_pool->consumer_index = 0;
590 tx_pool->producer_index = 0;
591 tx_pool->tso_index = 0;
592 }
593
594 return 0;
595 }
596
597 static void release_vpd_data(struct ibmvnic_adapter *adapter)
598 {
599 if (!adapter->vpd)
600 return;
601
602 kfree(adapter->vpd->buff);
603 kfree(adapter->vpd);
604
605 adapter->vpd = NULL;
606 }
607
608 static void release_tx_pools(struct ibmvnic_adapter *adapter)
609 {
610 struct ibmvnic_tx_pool *tx_pool;
611 int i;
612
613 if (!adapter->tx_pool)
614 return;
615
616 for (i = 0; i < adapter->num_active_tx_pools; i++) {
617 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
618 tx_pool = &adapter->tx_pool[i];
619 kfree(tx_pool->tx_buff);
620 free_long_term_buff(adapter, &tx_pool->long_term_buff);
621 free_long_term_buff(adapter, &tx_pool->tso_ltb);
622 kfree(tx_pool->free_map);
623 }
624
625 kfree(adapter->tx_pool);
626 adapter->tx_pool = NULL;
627 adapter->num_active_tx_pools = 0;
628 }
629
630 static int init_tx_pools(struct net_device *netdev)
631 {
632 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
633 struct device *dev = &adapter->vdev->dev;
634 struct ibmvnic_tx_pool *tx_pool;
635 int tx_subcrqs;
636 int i, j;
637
638 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
639 adapter->tx_pool = kcalloc(tx_subcrqs,
640 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
641 if (!adapter->tx_pool)
642 return -1;
643
644 adapter->num_active_tx_pools = 0;
645
646 for (i = 0; i < tx_subcrqs; i++) {
647 tx_pool = &adapter->tx_pool[i];
648
649 netdev_dbg(adapter->netdev,
650 "Initializing tx_pool[%d], %lld buffs\n",
651 i, adapter->req_tx_entries_per_subcrq);
652
653 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
654 sizeof(struct ibmvnic_tx_buff),
655 GFP_KERNEL);
656 if (!tx_pool->tx_buff) {
657 dev_err(dev, "tx pool buffer allocation failed\n");
658 release_tx_pools(adapter);
659 return -1;
660 }
661
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 adapter->req_tx_entries_per_subcrq *
664 adapter->req_mtu)) {
665 release_tx_pools(adapter);
666 return -1;
667 }
668
669 /* alloc TSO ltb */
670 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
671 IBMVNIC_TSO_BUFS *
672 IBMVNIC_TSO_BUF_SZ)) {
673 release_tx_pools(adapter);
674 return -1;
675 }
676
677 tx_pool->tso_index = 0;
678
679 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
680 sizeof(int), GFP_KERNEL);
681 if (!tx_pool->free_map) {
682 release_tx_pools(adapter);
683 return -1;
684 }
685
686 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
687 tx_pool->free_map[j] = j;
688
689 tx_pool->consumer_index = 0;
690 tx_pool->producer_index = 0;
691 }
692
693 adapter->num_active_tx_pools = tx_subcrqs;
694
695 return 0;
696 }
697
698 static void release_error_buffers(struct ibmvnic_adapter *adapter)
699 {
700 struct device *dev = &adapter->vdev->dev;
701 struct ibmvnic_error_buff *error_buff, *tmp;
702 unsigned long flags;
703
704 spin_lock_irqsave(&adapter->error_list_lock, flags);
705 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
706 list_del(&error_buff->list);
707 dma_unmap_single(dev, error_buff->dma, error_buff->len,
708 DMA_FROM_DEVICE);
709 kfree(error_buff->buff);
710 kfree(error_buff);
711 }
712 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
713 }
714
715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
716 {
717 int i;
718
719 if (adapter->napi_enabled)
720 return;
721
722 for (i = 0; i < adapter->req_rx_queues; i++)
723 napi_enable(&adapter->napi[i]);
724
725 adapter->napi_enabled = true;
726 }
727
728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
729 {
730 int i;
731
732 if (!adapter->napi_enabled)
733 return;
734
735 for (i = 0; i < adapter->req_rx_queues; i++) {
736 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
737 napi_disable(&adapter->napi[i]);
738 }
739
740 adapter->napi_enabled = false;
741 }
742
743 static int ibmvnic_login(struct net_device *netdev)
744 {
745 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
746 unsigned long timeout = msecs_to_jiffies(30000);
747 struct device *dev = &adapter->vdev->dev;
748 int rc;
749
750 do {
751 if (adapter->renegotiate) {
752 adapter->renegotiate = false;
753 release_sub_crqs(adapter);
754
755 reinit_completion(&adapter->init_done);
756 send_cap_queries(adapter);
757 if (!wait_for_completion_timeout(&adapter->init_done,
758 timeout)) {
759 dev_err(dev, "Capabilities query timeout\n");
760 return -1;
761 }
762 rc = init_sub_crqs(adapter);
763 if (rc) {
764 dev_err(dev,
765 "Initialization of SCRQ's failed\n");
766 return -1;
767 }
768 rc = init_sub_crq_irqs(adapter);
769 if (rc) {
770 dev_err(dev,
771 "Initialization of SCRQ's irqs failed\n");
772 return -1;
773 }
774 }
775
776 reinit_completion(&adapter->init_done);
777 send_login(adapter);
778 if (!wait_for_completion_timeout(&adapter->init_done,
779 timeout)) {
780 dev_err(dev, "Login timeout\n");
781 return -1;
782 }
783 } while (adapter->renegotiate);
784
785 /* handle pending MAC address changes after successful login */
786 if (adapter->mac_change_pending) {
787 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
788 adapter->mac_change_pending = false;
789 }
790
791 return 0;
792 }
793
794 static void release_resources(struct ibmvnic_adapter *adapter)
795 {
796 int i;
797
798 release_vpd_data(adapter);
799
800 release_tx_pools(adapter);
801 release_rx_pools(adapter);
802
803 release_stats_token(adapter);
804 release_stats_buffers(adapter);
805 release_error_buffers(adapter);
806
807 if (adapter->napi) {
808 for (i = 0; i < adapter->req_rx_queues; i++) {
809 if (&adapter->napi[i]) {
810 netdev_dbg(adapter->netdev,
811 "Releasing napi[%d]\n", i);
812 netif_napi_del(&adapter->napi[i]);
813 }
814 }
815 }
816 }
817
818 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
819 {
820 struct net_device *netdev = adapter->netdev;
821 unsigned long timeout = msecs_to_jiffies(30000);
822 union ibmvnic_crq crq;
823 bool resend;
824 int rc;
825
826 netdev_dbg(netdev, "setting link state %d\n", link_state);
827
828 memset(&crq, 0, sizeof(crq));
829 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
830 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
831 crq.logical_link_state.link_state = link_state;
832
833 do {
834 resend = false;
835
836 reinit_completion(&adapter->init_done);
837 rc = ibmvnic_send_crq(adapter, &crq);
838 if (rc) {
839 netdev_err(netdev, "Failed to set link state\n");
840 return rc;
841 }
842
843 if (!wait_for_completion_timeout(&adapter->init_done,
844 timeout)) {
845 netdev_err(netdev, "timeout setting link state\n");
846 return -1;
847 }
848
849 if (adapter->init_done_rc == 1) {
850 /* Partuial success, delay and re-send */
851 mdelay(1000);
852 resend = true;
853 }
854 } while (resend);
855
856 return 0;
857 }
858
859 static int set_real_num_queues(struct net_device *netdev)
860 {
861 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
862 int rc;
863
864 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
865 adapter->req_tx_queues, adapter->req_rx_queues);
866
867 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
868 if (rc) {
869 netdev_err(netdev, "failed to set the number of tx queues\n");
870 return rc;
871 }
872
873 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
874 if (rc)
875 netdev_err(netdev, "failed to set the number of rx queues\n");
876
877 return rc;
878 }
879
880 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
881 {
882 struct device *dev = &adapter->vdev->dev;
883 union ibmvnic_crq crq;
884 int len = 0;
885
886 if (adapter->vpd->buff)
887 len = adapter->vpd->len;
888
889 init_completion(&adapter->fw_done);
890 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
891 crq.get_vpd_size.cmd = GET_VPD_SIZE;
892 ibmvnic_send_crq(adapter, &crq);
893 wait_for_completion(&adapter->fw_done);
894
895 if (!adapter->vpd->len)
896 return -ENODATA;
897
898 if (!adapter->vpd->buff)
899 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
900 else if (adapter->vpd->len != len)
901 adapter->vpd->buff =
902 krealloc(adapter->vpd->buff,
903 adapter->vpd->len, GFP_KERNEL);
904
905 if (!adapter->vpd->buff) {
906 dev_err(dev, "Could allocate VPD buffer\n");
907 return -ENOMEM;
908 }
909
910 adapter->vpd->dma_addr =
911 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
912 DMA_FROM_DEVICE);
913 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
914 dev_err(dev, "Could not map VPD buffer\n");
915 kfree(adapter->vpd->buff);
916 adapter->vpd->buff = NULL;
917 return -ENOMEM;
918 }
919
920 reinit_completion(&adapter->fw_done);
921 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
922 crq.get_vpd.cmd = GET_VPD;
923 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
924 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
925 ibmvnic_send_crq(adapter, &crq);
926 wait_for_completion(&adapter->fw_done);
927
928 return 0;
929 }
930
931 static int init_resources(struct ibmvnic_adapter *adapter)
932 {
933 struct net_device *netdev = adapter->netdev;
934 int i, rc;
935
936 rc = set_real_num_queues(netdev);
937 if (rc)
938 return rc;
939
940 rc = init_stats_buffers(adapter);
941 if (rc)
942 return rc;
943
944 rc = init_stats_token(adapter);
945 if (rc)
946 return rc;
947
948 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
949 if (!adapter->vpd)
950 return -ENOMEM;
951
952 /* Vital Product Data (VPD) */
953 rc = ibmvnic_get_vpd(adapter);
954 if (rc) {
955 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
956 return rc;
957 }
958
959 adapter->map_id = 1;
960 adapter->napi = kcalloc(adapter->req_rx_queues,
961 sizeof(struct napi_struct), GFP_KERNEL);
962 if (!adapter->napi)
963 return -ENOMEM;
964
965 for (i = 0; i < adapter->req_rx_queues; i++) {
966 netdev_dbg(netdev, "Adding napi[%d]\n", i);
967 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
968 NAPI_POLL_WEIGHT);
969 }
970
971 send_map_query(adapter);
972
973 rc = init_rx_pools(netdev);
974 if (rc)
975 return rc;
976
977 rc = init_tx_pools(netdev);
978 return rc;
979 }
980
981 static int __ibmvnic_open(struct net_device *netdev)
982 {
983 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
984 enum vnic_state prev_state = adapter->state;
985 int i, rc;
986
987 adapter->state = VNIC_OPENING;
988 replenish_pools(adapter);
989 ibmvnic_napi_enable(adapter);
990
991 /* We're ready to receive frames, enable the sub-crq interrupts and
992 * set the logical link state to up
993 */
994 for (i = 0; i < adapter->req_rx_queues; i++) {
995 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
996 if (prev_state == VNIC_CLOSED)
997 enable_irq(adapter->rx_scrq[i]->irq);
998 else
999 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1000 }
1001
1002 for (i = 0; i < adapter->req_tx_queues; i++) {
1003 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1004 if (prev_state == VNIC_CLOSED)
1005 enable_irq(adapter->tx_scrq[i]->irq);
1006 else
1007 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1008 }
1009
1010 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1011 if (rc) {
1012 for (i = 0; i < adapter->req_rx_queues; i++)
1013 napi_disable(&adapter->napi[i]);
1014 release_resources(adapter);
1015 return rc;
1016 }
1017
1018 netif_tx_start_all_queues(netdev);
1019
1020 if (prev_state == VNIC_CLOSED) {
1021 for (i = 0; i < adapter->req_rx_queues; i++)
1022 napi_schedule(&adapter->napi[i]);
1023 }
1024
1025 adapter->state = VNIC_OPEN;
1026 return rc;
1027 }
1028
1029 static int ibmvnic_open(struct net_device *netdev)
1030 {
1031 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1032 int rc;
1033
1034 mutex_lock(&adapter->reset_lock);
1035
1036 if (adapter->state != VNIC_CLOSED) {
1037 rc = ibmvnic_login(netdev);
1038 if (rc) {
1039 mutex_unlock(&adapter->reset_lock);
1040 return rc;
1041 }
1042
1043 rc = init_resources(adapter);
1044 if (rc) {
1045 netdev_err(netdev, "failed to initialize resources\n");
1046 release_resources(adapter);
1047 mutex_unlock(&adapter->reset_lock);
1048 return rc;
1049 }
1050 }
1051
1052 rc = __ibmvnic_open(netdev);
1053 netif_carrier_on(netdev);
1054
1055 mutex_unlock(&adapter->reset_lock);
1056
1057 return rc;
1058 }
1059
1060 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1061 {
1062 struct ibmvnic_tx_pool *tx_pool;
1063 u64 tx_entries;
1064 int tx_scrqs;
1065 int i, j;
1066
1067 if (!adapter->tx_pool)
1068 return;
1069
1070 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1071 tx_entries = adapter->req_tx_entries_per_subcrq;
1072
1073 /* Free any remaining skbs in the tx buffer pools */
1074 for (i = 0; i < tx_scrqs; i++) {
1075 tx_pool = &adapter->tx_pool[i];
1076 if (!tx_pool)
1077 continue;
1078
1079 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1080 for (j = 0; j < tx_entries; j++) {
1081 if (tx_pool->tx_buff[j].skb) {
1082 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1083 tx_pool->tx_buff[j].skb = NULL;
1084 }
1085 }
1086 }
1087 }
1088
1089 static int __ibmvnic_close(struct net_device *netdev)
1090 {
1091 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1092 int rc = 0;
1093 int i;
1094
1095 adapter->state = VNIC_CLOSING;
1096
1097 /* ensure that transmissions are stopped if called by do_reset */
1098 if (adapter->resetting)
1099 netif_tx_disable(netdev);
1100 else
1101 netif_tx_stop_all_queues(netdev);
1102
1103 ibmvnic_napi_disable(adapter);
1104
1105 if (adapter->tx_scrq) {
1106 for (i = 0; i < adapter->req_tx_queues; i++)
1107 if (adapter->tx_scrq[i]->irq) {
1108 netdev_dbg(adapter->netdev,
1109 "Disabling tx_scrq[%d] irq\n", i);
1110 disable_irq(adapter->tx_scrq[i]->irq);
1111 }
1112 }
1113
1114 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1115 if (rc)
1116 return rc;
1117
1118 if (adapter->rx_scrq) {
1119 for (i = 0; i < adapter->req_rx_queues; i++) {
1120 int retries = 10;
1121
1122 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1123 retries--;
1124 mdelay(100);
1125
1126 if (retries == 0)
1127 break;
1128 }
1129
1130 if (adapter->rx_scrq[i]->irq) {
1131 netdev_dbg(adapter->netdev,
1132 "Disabling rx_scrq[%d] irq\n", i);
1133 disable_irq(adapter->rx_scrq[i]->irq);
1134 }
1135 }
1136 }
1137
1138 clean_tx_pools(adapter);
1139 adapter->state = VNIC_CLOSED;
1140 return rc;
1141 }
1142
1143 static int ibmvnic_close(struct net_device *netdev)
1144 {
1145 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1146 int rc;
1147
1148 mutex_lock(&adapter->reset_lock);
1149 rc = __ibmvnic_close(netdev);
1150 mutex_unlock(&adapter->reset_lock);
1151
1152 return rc;
1153 }
1154
1155 /**
1156 * build_hdr_data - creates L2/L3/L4 header data buffer
1157 * @hdr_field - bitfield determining needed headers
1158 * @skb - socket buffer
1159 * @hdr_len - array of header lengths
1160 * @tot_len - total length of data
1161 *
1162 * Reads hdr_field to determine which headers are needed by firmware.
1163 * Builds a buffer containing these headers. Saves individual header
1164 * lengths and total buffer length to be used to build descriptors.
1165 */
1166 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1167 int *hdr_len, u8 *hdr_data)
1168 {
1169 int len = 0;
1170 u8 *hdr;
1171
1172 hdr_len[0] = sizeof(struct ethhdr);
1173
1174 if (skb->protocol == htons(ETH_P_IP)) {
1175 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1176 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1177 hdr_len[2] = tcp_hdrlen(skb);
1178 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1179 hdr_len[2] = sizeof(struct udphdr);
1180 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1181 hdr_len[1] = sizeof(struct ipv6hdr);
1182 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1183 hdr_len[2] = tcp_hdrlen(skb);
1184 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1185 hdr_len[2] = sizeof(struct udphdr);
1186 } else if (skb->protocol == htons(ETH_P_ARP)) {
1187 hdr_len[1] = arp_hdr_len(skb->dev);
1188 hdr_len[2] = 0;
1189 }
1190
1191 memset(hdr_data, 0, 120);
1192 if ((hdr_field >> 6) & 1) {
1193 hdr = skb_mac_header(skb);
1194 memcpy(hdr_data, hdr, hdr_len[0]);
1195 len += hdr_len[0];
1196 }
1197
1198 if ((hdr_field >> 5) & 1) {
1199 hdr = skb_network_header(skb);
1200 memcpy(hdr_data + len, hdr, hdr_len[1]);
1201 len += hdr_len[1];
1202 }
1203
1204 if ((hdr_field >> 4) & 1) {
1205 hdr = skb_transport_header(skb);
1206 memcpy(hdr_data + len, hdr, hdr_len[2]);
1207 len += hdr_len[2];
1208 }
1209 return len;
1210 }
1211
1212 /**
1213 * create_hdr_descs - create header and header extension descriptors
1214 * @hdr_field - bitfield determining needed headers
1215 * @data - buffer containing header data
1216 * @len - length of data buffer
1217 * @hdr_len - array of individual header lengths
1218 * @scrq_arr - descriptor array
1219 *
1220 * Creates header and, if needed, header extension descriptors and
1221 * places them in a descriptor array, scrq_arr
1222 */
1223
1224 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1225 union sub_crq *scrq_arr)
1226 {
1227 union sub_crq hdr_desc;
1228 int tmp_len = len;
1229 int num_descs = 0;
1230 u8 *data, *cur;
1231 int tmp;
1232
1233 while (tmp_len > 0) {
1234 cur = hdr_data + len - tmp_len;
1235
1236 memset(&hdr_desc, 0, sizeof(hdr_desc));
1237 if (cur != hdr_data) {
1238 data = hdr_desc.hdr_ext.data;
1239 tmp = tmp_len > 29 ? 29 : tmp_len;
1240 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1241 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1242 hdr_desc.hdr_ext.len = tmp;
1243 } else {
1244 data = hdr_desc.hdr.data;
1245 tmp = tmp_len > 24 ? 24 : tmp_len;
1246 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1247 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1248 hdr_desc.hdr.len = tmp;
1249 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1250 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1251 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1252 hdr_desc.hdr.flag = hdr_field << 1;
1253 }
1254 memcpy(data, cur, tmp);
1255 tmp_len -= tmp;
1256 *scrq_arr = hdr_desc;
1257 scrq_arr++;
1258 num_descs++;
1259 }
1260
1261 return num_descs;
1262 }
1263
1264 /**
1265 * build_hdr_descs_arr - build a header descriptor array
1266 * @skb - socket buffer
1267 * @num_entries - number of descriptors to be sent
1268 * @subcrq - first TX descriptor
1269 * @hdr_field - bit field determining which headers will be sent
1270 *
1271 * This function will build a TX descriptor array with applicable
1272 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1273 */
1274
1275 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1276 int *num_entries, u8 hdr_field)
1277 {
1278 int hdr_len[3] = {0, 0, 0};
1279 int tot_len;
1280 u8 *hdr_data = txbuff->hdr_data;
1281
1282 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1283 txbuff->hdr_data);
1284 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1285 txbuff->indir_arr + 1);
1286 }
1287
1288 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1289 {
1290 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1291 int queue_num = skb_get_queue_mapping(skb);
1292 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1293 struct device *dev = &adapter->vdev->dev;
1294 struct ibmvnic_tx_buff *tx_buff = NULL;
1295 struct ibmvnic_sub_crq_queue *tx_scrq;
1296 struct ibmvnic_tx_pool *tx_pool;
1297 unsigned int tx_send_failed = 0;
1298 unsigned int tx_map_failed = 0;
1299 unsigned int tx_dropped = 0;
1300 unsigned int tx_packets = 0;
1301 unsigned int tx_bytes = 0;
1302 dma_addr_t data_dma_addr;
1303 struct netdev_queue *txq;
1304 unsigned long lpar_rc;
1305 union sub_crq tx_crq;
1306 unsigned int offset;
1307 int num_entries = 1;
1308 unsigned char *dst;
1309 u64 *handle_array;
1310 int index = 0;
1311 u8 proto = 0;
1312 int ret = 0;
1313
1314 if (adapter->resetting) {
1315 if (!netif_subqueue_stopped(netdev, skb))
1316 netif_stop_subqueue(netdev, queue_num);
1317 dev_kfree_skb_any(skb);
1318
1319 tx_send_failed++;
1320 tx_dropped++;
1321 ret = NETDEV_TX_OK;
1322 goto out;
1323 }
1324
1325 tx_pool = &adapter->tx_pool[queue_num];
1326 tx_scrq = adapter->tx_scrq[queue_num];
1327 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1328 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1329 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1330
1331 index = tx_pool->free_map[tx_pool->consumer_index];
1332
1333 if (skb_is_gso(skb)) {
1334 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1335 dst = tx_pool->tso_ltb.buff + offset;
1336 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1337 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1338 tx_pool->tso_index++;
1339 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1340 tx_pool->tso_index = 0;
1341 } else {
1342 offset = index * adapter->req_mtu;
1343 dst = tx_pool->long_term_buff.buff + offset;
1344 memset(dst, 0, adapter->req_mtu);
1345 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1346 }
1347
1348 if (skb_shinfo(skb)->nr_frags) {
1349 int cur, i;
1350
1351 /* Copy the head */
1352 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1353 cur = skb_headlen(skb);
1354
1355 /* Copy the frags */
1356 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1357 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1358
1359 memcpy(dst + cur,
1360 page_address(skb_frag_page(frag)) +
1361 frag->page_offset, skb_frag_size(frag));
1362 cur += skb_frag_size(frag);
1363 }
1364 } else {
1365 skb_copy_from_linear_data(skb, dst, skb->len);
1366 }
1367
1368 tx_pool->consumer_index =
1369 (tx_pool->consumer_index + 1) %
1370 adapter->req_tx_entries_per_subcrq;
1371
1372 tx_buff = &tx_pool->tx_buff[index];
1373 tx_buff->skb = skb;
1374 tx_buff->data_dma[0] = data_dma_addr;
1375 tx_buff->data_len[0] = skb->len;
1376 tx_buff->index = index;
1377 tx_buff->pool_index = queue_num;
1378 tx_buff->last_frag = true;
1379
1380 memset(&tx_crq, 0, sizeof(tx_crq));
1381 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1382 tx_crq.v1.type = IBMVNIC_TX_DESC;
1383 tx_crq.v1.n_crq_elem = 1;
1384 tx_crq.v1.n_sge = 1;
1385 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1386 tx_crq.v1.correlator = cpu_to_be32(index);
1387 if (skb_is_gso(skb))
1388 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1389 else
1390 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1391 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1392 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1393
1394 if (adapter->vlan_header_insertion) {
1395 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1396 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1397 }
1398
1399 if (skb->protocol == htons(ETH_P_IP)) {
1400 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1401 proto = ip_hdr(skb)->protocol;
1402 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1403 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1404 proto = ipv6_hdr(skb)->nexthdr;
1405 }
1406
1407 if (proto == IPPROTO_TCP)
1408 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1409 else if (proto == IPPROTO_UDP)
1410 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1411
1412 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1413 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1414 hdrs += 2;
1415 }
1416 if (skb_is_gso(skb)) {
1417 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1418 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1419 hdrs += 2;
1420 }
1421 /* determine if l2/3/4 headers are sent to firmware */
1422 if ((*hdrs >> 7) & 1) {
1423 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1424 tx_crq.v1.n_crq_elem = num_entries;
1425 tx_buff->indir_arr[0] = tx_crq;
1426 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1427 sizeof(tx_buff->indir_arr),
1428 DMA_TO_DEVICE);
1429 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1430 dev_kfree_skb_any(skb);
1431 tx_buff->skb = NULL;
1432 if (!firmware_has_feature(FW_FEATURE_CMO))
1433 dev_err(dev, "tx: unable to map descriptor array\n");
1434 tx_map_failed++;
1435 tx_dropped++;
1436 ret = NETDEV_TX_OK;
1437 goto out;
1438 }
1439 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1440 (u64)tx_buff->indir_dma,
1441 (u64)num_entries);
1442 } else {
1443 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1444 &tx_crq);
1445 }
1446 if (lpar_rc != H_SUCCESS) {
1447 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1448
1449 if (tx_pool->consumer_index == 0)
1450 tx_pool->consumer_index =
1451 adapter->req_tx_entries_per_subcrq - 1;
1452 else
1453 tx_pool->consumer_index--;
1454
1455 dev_kfree_skb_any(skb);
1456 tx_buff->skb = NULL;
1457
1458 if (lpar_rc == H_CLOSED) {
1459 /* Disable TX and report carrier off if queue is closed.
1460 * Firmware guarantees that a signal will be sent to the
1461 * driver, triggering a reset or some other action.
1462 */
1463 netif_tx_stop_all_queues(netdev);
1464 netif_carrier_off(netdev);
1465 }
1466
1467 tx_send_failed++;
1468 tx_dropped++;
1469 ret = NETDEV_TX_OK;
1470 goto out;
1471 }
1472
1473 if (atomic_inc_return(&tx_scrq->used)
1474 >= adapter->req_tx_entries_per_subcrq) {
1475 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1476 netif_stop_subqueue(netdev, queue_num);
1477 }
1478
1479 tx_packets++;
1480 tx_bytes += skb->len;
1481 txq->trans_start = jiffies;
1482 ret = NETDEV_TX_OK;
1483
1484 out:
1485 netdev->stats.tx_dropped += tx_dropped;
1486 netdev->stats.tx_bytes += tx_bytes;
1487 netdev->stats.tx_packets += tx_packets;
1488 adapter->tx_send_failed += tx_send_failed;
1489 adapter->tx_map_failed += tx_map_failed;
1490 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1491 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1492 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1493
1494 return ret;
1495 }
1496
1497 static void ibmvnic_set_multi(struct net_device *netdev)
1498 {
1499 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1500 struct netdev_hw_addr *ha;
1501 union ibmvnic_crq crq;
1502
1503 memset(&crq, 0, sizeof(crq));
1504 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1505 crq.request_capability.cmd = REQUEST_CAPABILITY;
1506
1507 if (netdev->flags & IFF_PROMISC) {
1508 if (!adapter->promisc_supported)
1509 return;
1510 } else {
1511 if (netdev->flags & IFF_ALLMULTI) {
1512 /* Accept all multicast */
1513 memset(&crq, 0, sizeof(crq));
1514 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1515 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1516 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1517 ibmvnic_send_crq(adapter, &crq);
1518 } else if (netdev_mc_empty(netdev)) {
1519 /* Reject all multicast */
1520 memset(&crq, 0, sizeof(crq));
1521 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1522 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1523 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1524 ibmvnic_send_crq(adapter, &crq);
1525 } else {
1526 /* Accept one or more multicast(s) */
1527 netdev_for_each_mc_addr(ha, netdev) {
1528 memset(&crq, 0, sizeof(crq));
1529 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1530 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1531 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1532 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1533 ha->addr);
1534 ibmvnic_send_crq(adapter, &crq);
1535 }
1536 }
1537 }
1538 }
1539
1540 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1541 {
1542 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1543 struct sockaddr *addr = p;
1544 union ibmvnic_crq crq;
1545
1546 if (!is_valid_ether_addr(addr->sa_data))
1547 return -EADDRNOTAVAIL;
1548
1549 memset(&crq, 0, sizeof(crq));
1550 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1551 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1552 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1553
1554 init_completion(&adapter->fw_done);
1555 ibmvnic_send_crq(adapter, &crq);
1556 wait_for_completion(&adapter->fw_done);
1557 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1558 return adapter->fw_done_rc ? -EIO : 0;
1559 }
1560
1561 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1562 {
1563 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1564 struct sockaddr *addr = p;
1565 int rc;
1566
1567 if (adapter->state == VNIC_PROBED) {
1568 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1569 adapter->mac_change_pending = true;
1570 return 0;
1571 }
1572
1573 rc = __ibmvnic_set_mac(netdev, addr);
1574
1575 return rc;
1576 }
1577
1578 /**
1579 * do_reset returns zero if we are able to keep processing reset events, or
1580 * non-zero if we hit a fatal error and must halt.
1581 */
1582 static int do_reset(struct ibmvnic_adapter *adapter,
1583 struct ibmvnic_rwi *rwi, u32 reset_state)
1584 {
1585 u64 old_num_rx_queues, old_num_tx_queues;
1586 struct net_device *netdev = adapter->netdev;
1587 int i, rc;
1588
1589 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1590 rwi->reset_reason);
1591
1592 netif_carrier_off(netdev);
1593 adapter->reset_reason = rwi->reset_reason;
1594
1595 old_num_rx_queues = adapter->req_rx_queues;
1596 old_num_tx_queues = adapter->req_tx_queues;
1597
1598 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1599 rc = ibmvnic_reenable_crq_queue(adapter);
1600 if (rc)
1601 return 0;
1602 }
1603
1604 rc = __ibmvnic_close(netdev);
1605 if (rc)
1606 return rc;
1607
1608 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1609 adapter->wait_for_reset) {
1610 release_resources(adapter);
1611 release_sub_crqs(adapter);
1612 release_crq_queue(adapter);
1613 }
1614
1615 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1616 /* remove the closed state so when we call open it appears
1617 * we are coming from the probed state.
1618 */
1619 adapter->state = VNIC_PROBED;
1620
1621 rc = ibmvnic_init(adapter);
1622 if (rc)
1623 return IBMVNIC_INIT_FAILED;
1624
1625 /* If the adapter was in PROBE state prior to the reset,
1626 * exit here.
1627 */
1628 if (reset_state == VNIC_PROBED)
1629 return 0;
1630
1631 rc = ibmvnic_login(netdev);
1632 if (rc) {
1633 adapter->state = VNIC_PROBED;
1634 return 0;
1635 }
1636
1637 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1638 adapter->wait_for_reset) {
1639 rc = init_resources(adapter);
1640 if (rc)
1641 return rc;
1642 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1643 adapter->req_tx_queues != old_num_tx_queues) {
1644 adapter->map_id = 1;
1645 release_rx_pools(adapter);
1646 release_tx_pools(adapter);
1647 init_rx_pools(netdev);
1648 init_tx_pools(netdev);
1649 } else {
1650 rc = reset_tx_pools(adapter);
1651 if (rc)
1652 return rc;
1653
1654 rc = reset_rx_pools(adapter);
1655 if (rc)
1656 return rc;
1657
1658 if (reset_state == VNIC_CLOSED)
1659 return 0;
1660 }
1661 }
1662
1663 rc = __ibmvnic_open(netdev);
1664 if (rc) {
1665 if (list_empty(&adapter->rwi_list))
1666 adapter->state = VNIC_CLOSED;
1667 else
1668 adapter->state = reset_state;
1669
1670 return 0;
1671 }
1672
1673 netif_carrier_on(netdev);
1674
1675 /* kick napi */
1676 for (i = 0; i < adapter->req_rx_queues; i++)
1677 napi_schedule(&adapter->napi[i]);
1678
1679 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1680 netdev_notify_peers(netdev);
1681
1682 return 0;
1683 }
1684
1685 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1686 {
1687 struct ibmvnic_rwi *rwi;
1688
1689 mutex_lock(&adapter->rwi_lock);
1690
1691 if (!list_empty(&adapter->rwi_list)) {
1692 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1693 list);
1694 list_del(&rwi->list);
1695 } else {
1696 rwi = NULL;
1697 }
1698
1699 mutex_unlock(&adapter->rwi_lock);
1700 return rwi;
1701 }
1702
1703 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1704 {
1705 struct ibmvnic_rwi *rwi;
1706
1707 rwi = get_next_rwi(adapter);
1708 while (rwi) {
1709 kfree(rwi);
1710 rwi = get_next_rwi(adapter);
1711 }
1712 }
1713
1714 static void __ibmvnic_reset(struct work_struct *work)
1715 {
1716 struct ibmvnic_rwi *rwi;
1717 struct ibmvnic_adapter *adapter;
1718 struct net_device *netdev;
1719 u32 reset_state;
1720 int rc = 0;
1721
1722 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1723 netdev = adapter->netdev;
1724
1725 mutex_lock(&adapter->reset_lock);
1726 adapter->resetting = true;
1727 reset_state = adapter->state;
1728
1729 rwi = get_next_rwi(adapter);
1730 while (rwi) {
1731 rc = do_reset(adapter, rwi, reset_state);
1732 kfree(rwi);
1733 if (rc && rc != IBMVNIC_INIT_FAILED)
1734 break;
1735
1736 rwi = get_next_rwi(adapter);
1737 }
1738
1739 if (adapter->wait_for_reset) {
1740 adapter->wait_for_reset = false;
1741 adapter->reset_done_rc = rc;
1742 complete(&adapter->reset_done);
1743 }
1744
1745 if (rc) {
1746 netdev_dbg(adapter->netdev, "Reset failed\n");
1747 free_all_rwi(adapter);
1748 mutex_unlock(&adapter->reset_lock);
1749 return;
1750 }
1751
1752 adapter->resetting = false;
1753 mutex_unlock(&adapter->reset_lock);
1754 }
1755
1756 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1757 enum ibmvnic_reset_reason reason)
1758 {
1759 struct ibmvnic_rwi *rwi, *tmp;
1760 struct net_device *netdev = adapter->netdev;
1761 struct list_head *entry;
1762
1763 if (adapter->state == VNIC_REMOVING ||
1764 adapter->state == VNIC_REMOVED) {
1765 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1766 return;
1767 }
1768
1769 if (adapter->state == VNIC_PROBING) {
1770 netdev_warn(netdev, "Adapter reset during probe\n");
1771 adapter->init_done_rc = EAGAIN;
1772 return;
1773 }
1774
1775 mutex_lock(&adapter->rwi_lock);
1776
1777 list_for_each(entry, &adapter->rwi_list) {
1778 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1779 if (tmp->reset_reason == reason) {
1780 netdev_dbg(netdev, "Skipping matching reset\n");
1781 mutex_unlock(&adapter->rwi_lock);
1782 return;
1783 }
1784 }
1785
1786 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1787 if (!rwi) {
1788 mutex_unlock(&adapter->rwi_lock);
1789 ibmvnic_close(netdev);
1790 return;
1791 }
1792
1793 rwi->reset_reason = reason;
1794 list_add_tail(&rwi->list, &adapter->rwi_list);
1795 mutex_unlock(&adapter->rwi_lock);
1796
1797 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1798 schedule_work(&adapter->ibmvnic_reset);
1799 }
1800
1801 static void ibmvnic_tx_timeout(struct net_device *dev)
1802 {
1803 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1804
1805 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1806 }
1807
1808 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1809 struct ibmvnic_rx_buff *rx_buff)
1810 {
1811 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1812
1813 rx_buff->skb = NULL;
1814
1815 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1816 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1817
1818 atomic_dec(&pool->available);
1819 }
1820
1821 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1822 {
1823 struct net_device *netdev = napi->dev;
1824 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1825 int scrq_num = (int)(napi - adapter->napi);
1826 int frames_processed = 0;
1827
1828 restart_poll:
1829 while (frames_processed < budget) {
1830 struct sk_buff *skb;
1831 struct ibmvnic_rx_buff *rx_buff;
1832 union sub_crq *next;
1833 u32 length;
1834 u16 offset;
1835 u8 flags = 0;
1836
1837 if (unlikely(adapter->resetting &&
1838 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1839 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1840 napi_complete_done(napi, frames_processed);
1841 return frames_processed;
1842 }
1843
1844 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1845 break;
1846 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1847 rx_buff =
1848 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1849 rx_comp.correlator);
1850 /* do error checking */
1851 if (next->rx_comp.rc) {
1852 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1853 be16_to_cpu(next->rx_comp.rc));
1854 /* free the entry */
1855 next->rx_comp.first = 0;
1856 remove_buff_from_pool(adapter, rx_buff);
1857 continue;
1858 }
1859
1860 length = be32_to_cpu(next->rx_comp.len);
1861 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1862 flags = next->rx_comp.flags;
1863 skb = rx_buff->skb;
1864 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1865 length);
1866
1867 /* VLAN Header has been stripped by the system firmware and
1868 * needs to be inserted by the driver
1869 */
1870 if (adapter->rx_vlan_header_insertion &&
1871 (flags & IBMVNIC_VLAN_STRIPPED))
1872 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1873 ntohs(next->rx_comp.vlan_tci));
1874
1875 /* free the entry */
1876 next->rx_comp.first = 0;
1877 remove_buff_from_pool(adapter, rx_buff);
1878
1879 skb_put(skb, length);
1880 skb->protocol = eth_type_trans(skb, netdev);
1881 skb_record_rx_queue(skb, scrq_num);
1882
1883 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1884 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1885 skb->ip_summed = CHECKSUM_UNNECESSARY;
1886 }
1887
1888 length = skb->len;
1889 napi_gro_receive(napi, skb); /* send it up */
1890 netdev->stats.rx_packets++;
1891 netdev->stats.rx_bytes += length;
1892 adapter->rx_stats_buffers[scrq_num].packets++;
1893 adapter->rx_stats_buffers[scrq_num].bytes += length;
1894 frames_processed++;
1895 }
1896
1897 if (adapter->state != VNIC_CLOSING)
1898 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1899
1900 if (frames_processed < budget) {
1901 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1902 napi_complete_done(napi, frames_processed);
1903 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1904 napi_reschedule(napi)) {
1905 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1906 goto restart_poll;
1907 }
1908 }
1909 return frames_processed;
1910 }
1911
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 static void ibmvnic_netpoll_controller(struct net_device *dev)
1914 {
1915 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1916 int i;
1917
1918 replenish_pools(netdev_priv(dev));
1919 for (i = 0; i < adapter->req_rx_queues; i++)
1920 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1921 adapter->rx_scrq[i]);
1922 }
1923 #endif
1924
1925 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1926 {
1927 adapter->fallback.mtu = adapter->req_mtu;
1928 adapter->fallback.rx_queues = adapter->req_rx_queues;
1929 adapter->fallback.tx_queues = adapter->req_tx_queues;
1930 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1931 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1932
1933 init_completion(&adapter->reset_done);
1934 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1935 adapter->wait_for_reset = true;
1936 wait_for_completion(&adapter->reset_done);
1937
1938 if (adapter->reset_done_rc) {
1939 adapter->desired.mtu = adapter->fallback.mtu;
1940 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1941 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1942 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1943 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1944
1945 init_completion(&adapter->reset_done);
1946 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1947 wait_for_completion(&adapter->reset_done);
1948 }
1949 adapter->wait_for_reset = false;
1950
1951 return adapter->reset_done_rc;
1952 }
1953
1954 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1955 {
1956 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1957
1958 adapter->desired.mtu = new_mtu + ETH_HLEN;
1959
1960 return wait_for_reset(adapter);
1961 }
1962
1963 static const struct net_device_ops ibmvnic_netdev_ops = {
1964 .ndo_open = ibmvnic_open,
1965 .ndo_stop = ibmvnic_close,
1966 .ndo_start_xmit = ibmvnic_xmit,
1967 .ndo_set_rx_mode = ibmvnic_set_multi,
1968 .ndo_set_mac_address = ibmvnic_set_mac,
1969 .ndo_validate_addr = eth_validate_addr,
1970 .ndo_tx_timeout = ibmvnic_tx_timeout,
1971 #ifdef CONFIG_NET_POLL_CONTROLLER
1972 .ndo_poll_controller = ibmvnic_netpoll_controller,
1973 #endif
1974 .ndo_change_mtu = ibmvnic_change_mtu,
1975 };
1976
1977 /* ethtool functions */
1978
1979 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1980 struct ethtool_link_ksettings *cmd)
1981 {
1982 u32 supported, advertising;
1983
1984 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1985 SUPPORTED_FIBRE);
1986 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1987 ADVERTISED_FIBRE);
1988 cmd->base.speed = SPEED_1000;
1989 cmd->base.duplex = DUPLEX_FULL;
1990 cmd->base.port = PORT_FIBRE;
1991 cmd->base.phy_address = 0;
1992 cmd->base.autoneg = AUTONEG_ENABLE;
1993
1994 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1995 supported);
1996 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1997 advertising);
1998
1999 return 0;
2000 }
2001
2002 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2003 struct ethtool_drvinfo *info)
2004 {
2005 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2006
2007 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2008 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2009 strlcpy(info->fw_version, adapter->fw_version,
2010 sizeof(info->fw_version));
2011 }
2012
2013 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2014 {
2015 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2016
2017 return adapter->msg_enable;
2018 }
2019
2020 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2021 {
2022 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2023
2024 adapter->msg_enable = data;
2025 }
2026
2027 static u32 ibmvnic_get_link(struct net_device *netdev)
2028 {
2029 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2030
2031 /* Don't need to send a query because we request a logical link up at
2032 * init and then we wait for link state indications
2033 */
2034 return adapter->logical_link_state;
2035 }
2036
2037 static void ibmvnic_get_ringparam(struct net_device *netdev,
2038 struct ethtool_ringparam *ring)
2039 {
2040 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2041
2042 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2043 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2044 ring->rx_mini_max_pending = 0;
2045 ring->rx_jumbo_max_pending = 0;
2046 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2047 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2048 ring->rx_mini_pending = 0;
2049 ring->rx_jumbo_pending = 0;
2050 }
2051
2052 static int ibmvnic_set_ringparam(struct net_device *netdev,
2053 struct ethtool_ringparam *ring)
2054 {
2055 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2056
2057 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2058 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2059 netdev_err(netdev, "Invalid request.\n");
2060 netdev_err(netdev, "Max tx buffers = %llu\n",
2061 adapter->max_rx_add_entries_per_subcrq);
2062 netdev_err(netdev, "Max rx buffers = %llu\n",
2063 adapter->max_tx_entries_per_subcrq);
2064 return -EINVAL;
2065 }
2066
2067 adapter->desired.rx_entries = ring->rx_pending;
2068 adapter->desired.tx_entries = ring->tx_pending;
2069
2070 return wait_for_reset(adapter);
2071 }
2072
2073 static void ibmvnic_get_channels(struct net_device *netdev,
2074 struct ethtool_channels *channels)
2075 {
2076 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2077
2078 channels->max_rx = adapter->max_rx_queues;
2079 channels->max_tx = adapter->max_tx_queues;
2080 channels->max_other = 0;
2081 channels->max_combined = 0;
2082 channels->rx_count = adapter->req_rx_queues;
2083 channels->tx_count = adapter->req_tx_queues;
2084 channels->other_count = 0;
2085 channels->combined_count = 0;
2086 }
2087
2088 static int ibmvnic_set_channels(struct net_device *netdev,
2089 struct ethtool_channels *channels)
2090 {
2091 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2092
2093 adapter->desired.rx_queues = channels->rx_count;
2094 adapter->desired.tx_queues = channels->tx_count;
2095
2096 return wait_for_reset(adapter);
2097 }
2098
2099 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2100 {
2101 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2102 int i;
2103
2104 if (stringset != ETH_SS_STATS)
2105 return;
2106
2107 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2108 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2109
2110 for (i = 0; i < adapter->req_tx_queues; i++) {
2111 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2112 data += ETH_GSTRING_LEN;
2113
2114 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2115 data += ETH_GSTRING_LEN;
2116
2117 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2118 data += ETH_GSTRING_LEN;
2119 }
2120
2121 for (i = 0; i < adapter->req_rx_queues; i++) {
2122 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2123 data += ETH_GSTRING_LEN;
2124
2125 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2126 data += ETH_GSTRING_LEN;
2127
2128 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2129 data += ETH_GSTRING_LEN;
2130 }
2131 }
2132
2133 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2134 {
2135 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2136
2137 switch (sset) {
2138 case ETH_SS_STATS:
2139 return ARRAY_SIZE(ibmvnic_stats) +
2140 adapter->req_tx_queues * NUM_TX_STATS +
2141 adapter->req_rx_queues * NUM_RX_STATS;
2142 default:
2143 return -EOPNOTSUPP;
2144 }
2145 }
2146
2147 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2148 struct ethtool_stats *stats, u64 *data)
2149 {
2150 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2151 union ibmvnic_crq crq;
2152 int i, j;
2153
2154 memset(&crq, 0, sizeof(crq));
2155 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2156 crq.request_statistics.cmd = REQUEST_STATISTICS;
2157 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2158 crq.request_statistics.len =
2159 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2160
2161 /* Wait for data to be written */
2162 init_completion(&adapter->stats_done);
2163 ibmvnic_send_crq(adapter, &crq);
2164 wait_for_completion(&adapter->stats_done);
2165
2166 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2167 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2168 ibmvnic_stats[i].offset));
2169
2170 for (j = 0; j < adapter->req_tx_queues; j++) {
2171 data[i] = adapter->tx_stats_buffers[j].packets;
2172 i++;
2173 data[i] = adapter->tx_stats_buffers[j].bytes;
2174 i++;
2175 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2176 i++;
2177 }
2178
2179 for (j = 0; j < adapter->req_rx_queues; j++) {
2180 data[i] = adapter->rx_stats_buffers[j].packets;
2181 i++;
2182 data[i] = adapter->rx_stats_buffers[j].bytes;
2183 i++;
2184 data[i] = adapter->rx_stats_buffers[j].interrupts;
2185 i++;
2186 }
2187 }
2188
2189 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2190 .get_drvinfo = ibmvnic_get_drvinfo,
2191 .get_msglevel = ibmvnic_get_msglevel,
2192 .set_msglevel = ibmvnic_set_msglevel,
2193 .get_link = ibmvnic_get_link,
2194 .get_ringparam = ibmvnic_get_ringparam,
2195 .set_ringparam = ibmvnic_set_ringparam,
2196 .get_channels = ibmvnic_get_channels,
2197 .set_channels = ibmvnic_set_channels,
2198 .get_strings = ibmvnic_get_strings,
2199 .get_sset_count = ibmvnic_get_sset_count,
2200 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2201 .get_link_ksettings = ibmvnic_get_link_ksettings,
2202 };
2203
2204 /* Routines for managing CRQs/sCRQs */
2205
2206 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2207 struct ibmvnic_sub_crq_queue *scrq)
2208 {
2209 int rc;
2210
2211 if (scrq->irq) {
2212 free_irq(scrq->irq, scrq);
2213 irq_dispose_mapping(scrq->irq);
2214 scrq->irq = 0;
2215 }
2216
2217 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2218 scrq->cur = 0;
2219
2220 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2221 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2222 return rc;
2223 }
2224
2225 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2226 {
2227 int i, rc;
2228
2229 for (i = 0; i < adapter->req_tx_queues; i++) {
2230 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2231 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2232 if (rc)
2233 return rc;
2234 }
2235
2236 for (i = 0; i < adapter->req_rx_queues; i++) {
2237 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2238 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2239 if (rc)
2240 return rc;
2241 }
2242
2243 return rc;
2244 }
2245
2246 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2247 struct ibmvnic_sub_crq_queue *scrq)
2248 {
2249 struct device *dev = &adapter->vdev->dev;
2250 long rc;
2251
2252 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2253
2254 /* Close the sub-crqs */
2255 do {
2256 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2257 adapter->vdev->unit_address,
2258 scrq->crq_num);
2259 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2260
2261 if (rc) {
2262 netdev_err(adapter->netdev,
2263 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2264 scrq->crq_num, rc);
2265 }
2266
2267 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2268 DMA_BIDIRECTIONAL);
2269 free_pages((unsigned long)scrq->msgs, 2);
2270 kfree(scrq);
2271 }
2272
2273 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2274 *adapter)
2275 {
2276 struct device *dev = &adapter->vdev->dev;
2277 struct ibmvnic_sub_crq_queue *scrq;
2278 int rc;
2279
2280 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2281 if (!scrq)
2282 return NULL;
2283
2284 scrq->msgs =
2285 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2286 if (!scrq->msgs) {
2287 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2288 goto zero_page_failed;
2289 }
2290
2291 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2292 DMA_BIDIRECTIONAL);
2293 if (dma_mapping_error(dev, scrq->msg_token)) {
2294 dev_warn(dev, "Couldn't map crq queue messages page\n");
2295 goto map_failed;
2296 }
2297
2298 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2299 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2300
2301 if (rc == H_RESOURCE)
2302 rc = ibmvnic_reset_crq(adapter);
2303
2304 if (rc == H_CLOSED) {
2305 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2306 } else if (rc) {
2307 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2308 goto reg_failed;
2309 }
2310
2311 scrq->adapter = adapter;
2312 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2313 spin_lock_init(&scrq->lock);
2314
2315 netdev_dbg(adapter->netdev,
2316 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2317 scrq->crq_num, scrq->hw_irq, scrq->irq);
2318
2319 return scrq;
2320
2321 reg_failed:
2322 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2323 DMA_BIDIRECTIONAL);
2324 map_failed:
2325 free_pages((unsigned long)scrq->msgs, 2);
2326 zero_page_failed:
2327 kfree(scrq);
2328
2329 return NULL;
2330 }
2331
2332 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2333 {
2334 int i;
2335
2336 if (adapter->tx_scrq) {
2337 for (i = 0; i < adapter->req_tx_queues; i++) {
2338 if (!adapter->tx_scrq[i])
2339 continue;
2340
2341 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2342 i);
2343 if (adapter->tx_scrq[i]->irq) {
2344 free_irq(adapter->tx_scrq[i]->irq,
2345 adapter->tx_scrq[i]);
2346 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2347 adapter->tx_scrq[i]->irq = 0;
2348 }
2349
2350 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2351 }
2352
2353 kfree(adapter->tx_scrq);
2354 adapter->tx_scrq = NULL;
2355 }
2356
2357 if (adapter->rx_scrq) {
2358 for (i = 0; i < adapter->req_rx_queues; i++) {
2359 if (!adapter->rx_scrq[i])
2360 continue;
2361
2362 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2363 i);
2364 if (adapter->rx_scrq[i]->irq) {
2365 free_irq(adapter->rx_scrq[i]->irq,
2366 adapter->rx_scrq[i]);
2367 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2368 adapter->rx_scrq[i]->irq = 0;
2369 }
2370
2371 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2372 }
2373
2374 kfree(adapter->rx_scrq);
2375 adapter->rx_scrq = NULL;
2376 }
2377 }
2378
2379 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2380 struct ibmvnic_sub_crq_queue *scrq)
2381 {
2382 struct device *dev = &adapter->vdev->dev;
2383 unsigned long rc;
2384
2385 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2386 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2387 if (rc)
2388 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2389 scrq->hw_irq, rc);
2390 return rc;
2391 }
2392
2393 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2394 struct ibmvnic_sub_crq_queue *scrq)
2395 {
2396 struct device *dev = &adapter->vdev->dev;
2397 unsigned long rc;
2398
2399 if (scrq->hw_irq > 0x100000000ULL) {
2400 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2401 return 1;
2402 }
2403
2404 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2405 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2406 if (rc)
2407 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2408 scrq->hw_irq, rc);
2409 return rc;
2410 }
2411
2412 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2413 struct ibmvnic_sub_crq_queue *scrq)
2414 {
2415 struct device *dev = &adapter->vdev->dev;
2416 struct ibmvnic_tx_buff *txbuff;
2417 union sub_crq *next;
2418 int index;
2419 int i, j;
2420 u8 first;
2421
2422 restart_loop:
2423 while (pending_scrq(adapter, scrq)) {
2424 unsigned int pool = scrq->pool_index;
2425
2426 next = ibmvnic_next_scrq(adapter, scrq);
2427 for (i = 0; i < next->tx_comp.num_comps; i++) {
2428 if (next->tx_comp.rcs[i]) {
2429 dev_err(dev, "tx error %x\n",
2430 next->tx_comp.rcs[i]);
2431 continue;
2432 }
2433 index = be32_to_cpu(next->tx_comp.correlators[i]);
2434 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2435
2436 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2437 if (!txbuff->data_dma[j])
2438 continue;
2439
2440 txbuff->data_dma[j] = 0;
2441 }
2442 /* if sub_crq was sent indirectly */
2443 first = txbuff->indir_arr[0].generic.first;
2444 if (first == IBMVNIC_CRQ_CMD) {
2445 dma_unmap_single(dev, txbuff->indir_dma,
2446 sizeof(txbuff->indir_arr),
2447 DMA_TO_DEVICE);
2448 }
2449
2450 if (txbuff->last_frag) {
2451 dev_kfree_skb_any(txbuff->skb);
2452 txbuff->skb = NULL;
2453 }
2454
2455 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2456 producer_index] = index;
2457 adapter->tx_pool[pool].producer_index =
2458 (adapter->tx_pool[pool].producer_index + 1) %
2459 adapter->req_tx_entries_per_subcrq;
2460 }
2461 /* remove tx_comp scrq*/
2462 next->tx_comp.first = 0;
2463
2464 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2465 (adapter->req_tx_entries_per_subcrq / 2) &&
2466 __netif_subqueue_stopped(adapter->netdev,
2467 scrq->pool_index)) {
2468 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2469 netdev_info(adapter->netdev, "Started queue %d\n",
2470 scrq->pool_index);
2471 }
2472 }
2473
2474 enable_scrq_irq(adapter, scrq);
2475
2476 if (pending_scrq(adapter, scrq)) {
2477 disable_scrq_irq(adapter, scrq);
2478 goto restart_loop;
2479 }
2480
2481 return 0;
2482 }
2483
2484 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2485 {
2486 struct ibmvnic_sub_crq_queue *scrq = instance;
2487 struct ibmvnic_adapter *adapter = scrq->adapter;
2488
2489 disable_scrq_irq(adapter, scrq);
2490 ibmvnic_complete_tx(adapter, scrq);
2491
2492 return IRQ_HANDLED;
2493 }
2494
2495 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2496 {
2497 struct ibmvnic_sub_crq_queue *scrq = instance;
2498 struct ibmvnic_adapter *adapter = scrq->adapter;
2499
2500 /* When booting a kdump kernel we can hit pending interrupts
2501 * prior to completing driver initialization.
2502 */
2503 if (unlikely(adapter->state != VNIC_OPEN))
2504 return IRQ_NONE;
2505
2506 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2507
2508 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2509 disable_scrq_irq(adapter, scrq);
2510 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2511 }
2512
2513 return IRQ_HANDLED;
2514 }
2515
2516 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2517 {
2518 struct device *dev = &adapter->vdev->dev;
2519 struct ibmvnic_sub_crq_queue *scrq;
2520 int i = 0, j = 0;
2521 int rc = 0;
2522
2523 for (i = 0; i < adapter->req_tx_queues; i++) {
2524 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2525 i);
2526 scrq = adapter->tx_scrq[i];
2527 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2528
2529 if (!scrq->irq) {
2530 rc = -EINVAL;
2531 dev_err(dev, "Error mapping irq\n");
2532 goto req_tx_irq_failed;
2533 }
2534
2535 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2536 0, "ibmvnic_tx", scrq);
2537
2538 if (rc) {
2539 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2540 scrq->irq, rc);
2541 irq_dispose_mapping(scrq->irq);
2542 goto req_rx_irq_failed;
2543 }
2544 }
2545
2546 for (i = 0; i < adapter->req_rx_queues; i++) {
2547 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2548 i);
2549 scrq = adapter->rx_scrq[i];
2550 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2551 if (!scrq->irq) {
2552 rc = -EINVAL;
2553 dev_err(dev, "Error mapping irq\n");
2554 goto req_rx_irq_failed;
2555 }
2556 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2557 0, "ibmvnic_rx", scrq);
2558 if (rc) {
2559 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2560 scrq->irq, rc);
2561 irq_dispose_mapping(scrq->irq);
2562 goto req_rx_irq_failed;
2563 }
2564 }
2565 return rc;
2566
2567 req_rx_irq_failed:
2568 for (j = 0; j < i; j++) {
2569 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2570 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2571 }
2572 i = adapter->req_tx_queues;
2573 req_tx_irq_failed:
2574 for (j = 0; j < i; j++) {
2575 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2576 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2577 }
2578 release_sub_crqs(adapter);
2579 return rc;
2580 }
2581
2582 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2583 {
2584 struct device *dev = &adapter->vdev->dev;
2585 struct ibmvnic_sub_crq_queue **allqueues;
2586 int registered_queues = 0;
2587 int total_queues;
2588 int more = 0;
2589 int i;
2590
2591 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2592
2593 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2594 if (!allqueues)
2595 return -1;
2596
2597 for (i = 0; i < total_queues; i++) {
2598 allqueues[i] = init_sub_crq_queue(adapter);
2599 if (!allqueues[i]) {
2600 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2601 break;
2602 }
2603 registered_queues++;
2604 }
2605
2606 /* Make sure we were able to register the minimum number of queues */
2607 if (registered_queues <
2608 adapter->min_tx_queues + adapter->min_rx_queues) {
2609 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2610 goto tx_failed;
2611 }
2612
2613 /* Distribute the failed allocated queues*/
2614 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2615 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2616 switch (i % 3) {
2617 case 0:
2618 if (adapter->req_rx_queues > adapter->min_rx_queues)
2619 adapter->req_rx_queues--;
2620 else
2621 more++;
2622 break;
2623 case 1:
2624 if (adapter->req_tx_queues > adapter->min_tx_queues)
2625 adapter->req_tx_queues--;
2626 else
2627 more++;
2628 break;
2629 }
2630 }
2631
2632 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2633 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2634 if (!adapter->tx_scrq)
2635 goto tx_failed;
2636
2637 for (i = 0; i < adapter->req_tx_queues; i++) {
2638 adapter->tx_scrq[i] = allqueues[i];
2639 adapter->tx_scrq[i]->pool_index = i;
2640 }
2641
2642 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2643 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2644 if (!adapter->rx_scrq)
2645 goto rx_failed;
2646
2647 for (i = 0; i < adapter->req_rx_queues; i++) {
2648 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2649 adapter->rx_scrq[i]->scrq_num = i;
2650 }
2651
2652 kfree(allqueues);
2653 return 0;
2654
2655 rx_failed:
2656 kfree(adapter->tx_scrq);
2657 adapter->tx_scrq = NULL;
2658 tx_failed:
2659 for (i = 0; i < registered_queues; i++)
2660 release_sub_crq_queue(adapter, allqueues[i]);
2661 kfree(allqueues);
2662 return -1;
2663 }
2664
2665 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2666 {
2667 struct device *dev = &adapter->vdev->dev;
2668 union ibmvnic_crq crq;
2669 int max_entries;
2670
2671 if (!retry) {
2672 /* Sub-CRQ entries are 32 byte long */
2673 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2674
2675 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2676 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2677 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2678 return;
2679 }
2680
2681 if (adapter->desired.mtu)
2682 adapter->req_mtu = adapter->desired.mtu;
2683 else
2684 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2685
2686 if (!adapter->desired.tx_entries)
2687 adapter->desired.tx_entries =
2688 adapter->max_tx_entries_per_subcrq;
2689 if (!adapter->desired.rx_entries)
2690 adapter->desired.rx_entries =
2691 adapter->max_rx_add_entries_per_subcrq;
2692
2693 max_entries = IBMVNIC_MAX_LTB_SIZE /
2694 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2695
2696 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2697 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2698 adapter->desired.tx_entries = max_entries;
2699 }
2700
2701 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2702 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2703 adapter->desired.rx_entries = max_entries;
2704 }
2705
2706 if (adapter->desired.tx_entries)
2707 adapter->req_tx_entries_per_subcrq =
2708 adapter->desired.tx_entries;
2709 else
2710 adapter->req_tx_entries_per_subcrq =
2711 adapter->max_tx_entries_per_subcrq;
2712
2713 if (adapter->desired.rx_entries)
2714 adapter->req_rx_add_entries_per_subcrq =
2715 adapter->desired.rx_entries;
2716 else
2717 adapter->req_rx_add_entries_per_subcrq =
2718 adapter->max_rx_add_entries_per_subcrq;
2719
2720 if (adapter->desired.tx_queues)
2721 adapter->req_tx_queues =
2722 adapter->desired.tx_queues;
2723 else
2724 adapter->req_tx_queues =
2725 adapter->opt_tx_comp_sub_queues;
2726
2727 if (adapter->desired.rx_queues)
2728 adapter->req_rx_queues =
2729 adapter->desired.rx_queues;
2730 else
2731 adapter->req_rx_queues =
2732 adapter->opt_rx_comp_queues;
2733
2734 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2735 }
2736
2737 memset(&crq, 0, sizeof(crq));
2738 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2739 crq.request_capability.cmd = REQUEST_CAPABILITY;
2740
2741 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2742 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2743 atomic_inc(&adapter->running_cap_crqs);
2744 ibmvnic_send_crq(adapter, &crq);
2745
2746 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2747 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2748 atomic_inc(&adapter->running_cap_crqs);
2749 ibmvnic_send_crq(adapter, &crq);
2750
2751 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2752 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2753 atomic_inc(&adapter->running_cap_crqs);
2754 ibmvnic_send_crq(adapter, &crq);
2755
2756 crq.request_capability.capability =
2757 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2758 crq.request_capability.number =
2759 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2760 atomic_inc(&adapter->running_cap_crqs);
2761 ibmvnic_send_crq(adapter, &crq);
2762
2763 crq.request_capability.capability =
2764 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2765 crq.request_capability.number =
2766 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2767 atomic_inc(&adapter->running_cap_crqs);
2768 ibmvnic_send_crq(adapter, &crq);
2769
2770 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2771 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2772 atomic_inc(&adapter->running_cap_crqs);
2773 ibmvnic_send_crq(adapter, &crq);
2774
2775 if (adapter->netdev->flags & IFF_PROMISC) {
2776 if (adapter->promisc_supported) {
2777 crq.request_capability.capability =
2778 cpu_to_be16(PROMISC_REQUESTED);
2779 crq.request_capability.number = cpu_to_be64(1);
2780 atomic_inc(&adapter->running_cap_crqs);
2781 ibmvnic_send_crq(adapter, &crq);
2782 }
2783 } else {
2784 crq.request_capability.capability =
2785 cpu_to_be16(PROMISC_REQUESTED);
2786 crq.request_capability.number = cpu_to_be64(0);
2787 atomic_inc(&adapter->running_cap_crqs);
2788 ibmvnic_send_crq(adapter, &crq);
2789 }
2790 }
2791
2792 static int pending_scrq(struct ibmvnic_adapter *adapter,
2793 struct ibmvnic_sub_crq_queue *scrq)
2794 {
2795 union sub_crq *entry = &scrq->msgs[scrq->cur];
2796
2797 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2798 return 1;
2799 else
2800 return 0;
2801 }
2802
2803 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2804 struct ibmvnic_sub_crq_queue *scrq)
2805 {
2806 union sub_crq *entry;
2807 unsigned long flags;
2808
2809 spin_lock_irqsave(&scrq->lock, flags);
2810 entry = &scrq->msgs[scrq->cur];
2811 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2812 if (++scrq->cur == scrq->size)
2813 scrq->cur = 0;
2814 } else {
2815 entry = NULL;
2816 }
2817 spin_unlock_irqrestore(&scrq->lock, flags);
2818
2819 return entry;
2820 }
2821
2822 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2823 {
2824 struct ibmvnic_crq_queue *queue = &adapter->crq;
2825 union ibmvnic_crq *crq;
2826
2827 crq = &queue->msgs[queue->cur];
2828 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2829 if (++queue->cur == queue->size)
2830 queue->cur = 0;
2831 } else {
2832 crq = NULL;
2833 }
2834
2835 return crq;
2836 }
2837
2838 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2839 union sub_crq *sub_crq)
2840 {
2841 unsigned int ua = adapter->vdev->unit_address;
2842 struct device *dev = &adapter->vdev->dev;
2843 u64 *u64_crq = (u64 *)sub_crq;
2844 int rc;
2845
2846 netdev_dbg(adapter->netdev,
2847 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2848 (unsigned long int)cpu_to_be64(remote_handle),
2849 (unsigned long int)cpu_to_be64(u64_crq[0]),
2850 (unsigned long int)cpu_to_be64(u64_crq[1]),
2851 (unsigned long int)cpu_to_be64(u64_crq[2]),
2852 (unsigned long int)cpu_to_be64(u64_crq[3]));
2853
2854 /* Make sure the hypervisor sees the complete request */
2855 mb();
2856
2857 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2858 cpu_to_be64(remote_handle),
2859 cpu_to_be64(u64_crq[0]),
2860 cpu_to_be64(u64_crq[1]),
2861 cpu_to_be64(u64_crq[2]),
2862 cpu_to_be64(u64_crq[3]));
2863
2864 if (rc) {
2865 if (rc == H_CLOSED)
2866 dev_warn(dev, "CRQ Queue closed\n");
2867 dev_err(dev, "Send error (rc=%d)\n", rc);
2868 }
2869
2870 return rc;
2871 }
2872
2873 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2874 u64 remote_handle, u64 ioba, u64 num_entries)
2875 {
2876 unsigned int ua = adapter->vdev->unit_address;
2877 struct device *dev = &adapter->vdev->dev;
2878 int rc;
2879
2880 /* Make sure the hypervisor sees the complete request */
2881 mb();
2882 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2883 cpu_to_be64(remote_handle),
2884 ioba, num_entries);
2885
2886 if (rc) {
2887 if (rc == H_CLOSED)
2888 dev_warn(dev, "CRQ Queue closed\n");
2889 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2890 }
2891
2892 return rc;
2893 }
2894
2895 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2896 union ibmvnic_crq *crq)
2897 {
2898 unsigned int ua = adapter->vdev->unit_address;
2899 struct device *dev = &adapter->vdev->dev;
2900 u64 *u64_crq = (u64 *)crq;
2901 int rc;
2902
2903 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2904 (unsigned long int)cpu_to_be64(u64_crq[0]),
2905 (unsigned long int)cpu_to_be64(u64_crq[1]));
2906
2907 /* Make sure the hypervisor sees the complete request */
2908 mb();
2909
2910 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2911 cpu_to_be64(u64_crq[0]),
2912 cpu_to_be64(u64_crq[1]));
2913
2914 if (rc) {
2915 if (rc == H_CLOSED) {
2916 dev_warn(dev, "CRQ Queue closed\n");
2917 if (adapter->resetting)
2918 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2919 }
2920
2921 dev_warn(dev, "Send error (rc=%d)\n", rc);
2922 }
2923
2924 return rc;
2925 }
2926
2927 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2928 {
2929 union ibmvnic_crq crq;
2930
2931 memset(&crq, 0, sizeof(crq));
2932 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2933 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2934 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2935
2936 return ibmvnic_send_crq(adapter, &crq);
2937 }
2938
2939 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2940 {
2941 union ibmvnic_crq crq;
2942
2943 memset(&crq, 0, sizeof(crq));
2944 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2945 crq.version_exchange.cmd = VERSION_EXCHANGE;
2946 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2947
2948 return ibmvnic_send_crq(adapter, &crq);
2949 }
2950
2951 struct vnic_login_client_data {
2952 u8 type;
2953 __be16 len;
2954 char name;
2955 } __packed;
2956
2957 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2958 {
2959 int len;
2960
2961 /* Calculate the amount of buffer space needed for the
2962 * vnic client data in the login buffer. There are four entries,
2963 * OS name, LPAR name, device name, and a null last entry.
2964 */
2965 len = 4 * sizeof(struct vnic_login_client_data);
2966 len += 6; /* "Linux" plus NULL */
2967 len += strlen(utsname()->nodename) + 1;
2968 len += strlen(adapter->netdev->name) + 1;
2969
2970 return len;
2971 }
2972
2973 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2974 struct vnic_login_client_data *vlcd)
2975 {
2976 const char *os_name = "Linux";
2977 int len;
2978
2979 /* Type 1 - LPAR OS */
2980 vlcd->type = 1;
2981 len = strlen(os_name) + 1;
2982 vlcd->len = cpu_to_be16(len);
2983 strncpy(&vlcd->name, os_name, len);
2984 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2985
2986 /* Type 2 - LPAR name */
2987 vlcd->type = 2;
2988 len = strlen(utsname()->nodename) + 1;
2989 vlcd->len = cpu_to_be16(len);
2990 strncpy(&vlcd->name, utsname()->nodename, len);
2991 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2992
2993 /* Type 3 - device name */
2994 vlcd->type = 3;
2995 len = strlen(adapter->netdev->name) + 1;
2996 vlcd->len = cpu_to_be16(len);
2997 strncpy(&vlcd->name, adapter->netdev->name, len);
2998 }
2999
3000 static void send_login(struct ibmvnic_adapter *adapter)
3001 {
3002 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3003 struct ibmvnic_login_buffer *login_buffer;
3004 struct device *dev = &adapter->vdev->dev;
3005 dma_addr_t rsp_buffer_token;
3006 dma_addr_t buffer_token;
3007 size_t rsp_buffer_size;
3008 union ibmvnic_crq crq;
3009 size_t buffer_size;
3010 __be64 *tx_list_p;
3011 __be64 *rx_list_p;
3012 int client_data_len;
3013 struct vnic_login_client_data *vlcd;
3014 int i;
3015
3016 client_data_len = vnic_client_data_len(adapter);
3017
3018 buffer_size =
3019 sizeof(struct ibmvnic_login_buffer) +
3020 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3021 client_data_len;
3022
3023 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3024 if (!login_buffer)
3025 goto buf_alloc_failed;
3026
3027 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3028 DMA_TO_DEVICE);
3029 if (dma_mapping_error(dev, buffer_token)) {
3030 dev_err(dev, "Couldn't map login buffer\n");
3031 goto buf_map_failed;
3032 }
3033
3034 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3035 sizeof(u64) * adapter->req_tx_queues +
3036 sizeof(u64) * adapter->req_rx_queues +
3037 sizeof(u64) * adapter->req_rx_queues +
3038 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3039
3040 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3041 if (!login_rsp_buffer)
3042 goto buf_rsp_alloc_failed;
3043
3044 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3045 rsp_buffer_size, DMA_FROM_DEVICE);
3046 if (dma_mapping_error(dev, rsp_buffer_token)) {
3047 dev_err(dev, "Couldn't map login rsp buffer\n");
3048 goto buf_rsp_map_failed;
3049 }
3050
3051 adapter->login_buf = login_buffer;
3052 adapter->login_buf_token = buffer_token;
3053 adapter->login_buf_sz = buffer_size;
3054 adapter->login_rsp_buf = login_rsp_buffer;
3055 adapter->login_rsp_buf_token = rsp_buffer_token;
3056 adapter->login_rsp_buf_sz = rsp_buffer_size;
3057
3058 login_buffer->len = cpu_to_be32(buffer_size);
3059 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3060 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3061 login_buffer->off_txcomp_subcrqs =
3062 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3063 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3064 login_buffer->off_rxcomp_subcrqs =
3065 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3066 sizeof(u64) * adapter->req_tx_queues);
3067 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3068 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3069
3070 tx_list_p = (__be64 *)((char *)login_buffer +
3071 sizeof(struct ibmvnic_login_buffer));
3072 rx_list_p = (__be64 *)((char *)login_buffer +
3073 sizeof(struct ibmvnic_login_buffer) +
3074 sizeof(u64) * adapter->req_tx_queues);
3075
3076 for (i = 0; i < adapter->req_tx_queues; i++) {
3077 if (adapter->tx_scrq[i]) {
3078 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3079 crq_num);
3080 }
3081 }
3082
3083 for (i = 0; i < adapter->req_rx_queues; i++) {
3084 if (adapter->rx_scrq[i]) {
3085 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3086 crq_num);
3087 }
3088 }
3089
3090 /* Insert vNIC login client data */
3091 vlcd = (struct vnic_login_client_data *)
3092 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3093 login_buffer->client_data_offset =
3094 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3095 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3096
3097 vnic_add_client_data(adapter, vlcd);
3098
3099 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3100 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3101 netdev_dbg(adapter->netdev, "%016lx\n",
3102 ((unsigned long int *)(adapter->login_buf))[i]);
3103 }
3104
3105 memset(&crq, 0, sizeof(crq));
3106 crq.login.first = IBMVNIC_CRQ_CMD;
3107 crq.login.cmd = LOGIN;
3108 crq.login.ioba = cpu_to_be32(buffer_token);
3109 crq.login.len = cpu_to_be32(buffer_size);
3110 ibmvnic_send_crq(adapter, &crq);
3111
3112 return;
3113
3114 buf_rsp_map_failed:
3115 kfree(login_rsp_buffer);
3116 buf_rsp_alloc_failed:
3117 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3118 buf_map_failed:
3119 kfree(login_buffer);
3120 buf_alloc_failed:
3121 return;
3122 }
3123
3124 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3125 u32 len, u8 map_id)
3126 {
3127 union ibmvnic_crq crq;
3128
3129 memset(&crq, 0, sizeof(crq));
3130 crq.request_map.first = IBMVNIC_CRQ_CMD;
3131 crq.request_map.cmd = REQUEST_MAP;
3132 crq.request_map.map_id = map_id;
3133 crq.request_map.ioba = cpu_to_be32(addr);
3134 crq.request_map.len = cpu_to_be32(len);
3135 ibmvnic_send_crq(adapter, &crq);
3136 }
3137
3138 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3139 {
3140 union ibmvnic_crq crq;
3141
3142 memset(&crq, 0, sizeof(crq));
3143 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3144 crq.request_unmap.cmd = REQUEST_UNMAP;
3145 crq.request_unmap.map_id = map_id;
3146 ibmvnic_send_crq(adapter, &crq);
3147 }
3148
3149 static void send_map_query(struct ibmvnic_adapter *adapter)
3150 {
3151 union ibmvnic_crq crq;
3152
3153 memset(&crq, 0, sizeof(crq));
3154 crq.query_map.first = IBMVNIC_CRQ_CMD;
3155 crq.query_map.cmd = QUERY_MAP;
3156 ibmvnic_send_crq(adapter, &crq);
3157 }
3158
3159 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3160 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3161 {
3162 union ibmvnic_crq crq;
3163
3164 atomic_set(&adapter->running_cap_crqs, 0);
3165 memset(&crq, 0, sizeof(crq));
3166 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3167 crq.query_capability.cmd = QUERY_CAPABILITY;
3168
3169 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3170 atomic_inc(&adapter->running_cap_crqs);
3171 ibmvnic_send_crq(adapter, &crq);
3172
3173 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3174 atomic_inc(&adapter->running_cap_crqs);
3175 ibmvnic_send_crq(adapter, &crq);
3176
3177 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3178 atomic_inc(&adapter->running_cap_crqs);
3179 ibmvnic_send_crq(adapter, &crq);
3180
3181 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3182 atomic_inc(&adapter->running_cap_crqs);
3183 ibmvnic_send_crq(adapter, &crq);
3184
3185 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3186 atomic_inc(&adapter->running_cap_crqs);
3187 ibmvnic_send_crq(adapter, &crq);
3188
3189 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3190 atomic_inc(&adapter->running_cap_crqs);
3191 ibmvnic_send_crq(adapter, &crq);
3192
3193 crq.query_capability.capability =
3194 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3195 atomic_inc(&adapter->running_cap_crqs);
3196 ibmvnic_send_crq(adapter, &crq);
3197
3198 crq.query_capability.capability =
3199 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3200 atomic_inc(&adapter->running_cap_crqs);
3201 ibmvnic_send_crq(adapter, &crq);
3202
3203 crq.query_capability.capability =
3204 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3205 atomic_inc(&adapter->running_cap_crqs);
3206 ibmvnic_send_crq(adapter, &crq);
3207
3208 crq.query_capability.capability =
3209 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3210 atomic_inc(&adapter->running_cap_crqs);
3211 ibmvnic_send_crq(adapter, &crq);
3212
3213 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3214 atomic_inc(&adapter->running_cap_crqs);
3215 ibmvnic_send_crq(adapter, &crq);
3216
3217 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3218 atomic_inc(&adapter->running_cap_crqs);
3219 ibmvnic_send_crq(adapter, &crq);
3220
3221 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3222 atomic_inc(&adapter->running_cap_crqs);
3223 ibmvnic_send_crq(adapter, &crq);
3224
3225 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3226 atomic_inc(&adapter->running_cap_crqs);
3227 ibmvnic_send_crq(adapter, &crq);
3228
3229 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3230 atomic_inc(&adapter->running_cap_crqs);
3231 ibmvnic_send_crq(adapter, &crq);
3232
3233 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3234 atomic_inc(&adapter->running_cap_crqs);
3235 ibmvnic_send_crq(adapter, &crq);
3236
3237 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3238 atomic_inc(&adapter->running_cap_crqs);
3239 ibmvnic_send_crq(adapter, &crq);
3240
3241 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3242 atomic_inc(&adapter->running_cap_crqs);
3243 ibmvnic_send_crq(adapter, &crq);
3244
3245 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3246 atomic_inc(&adapter->running_cap_crqs);
3247 ibmvnic_send_crq(adapter, &crq);
3248
3249 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3250 atomic_inc(&adapter->running_cap_crqs);
3251 ibmvnic_send_crq(adapter, &crq);
3252
3253 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3254 atomic_inc(&adapter->running_cap_crqs);
3255 ibmvnic_send_crq(adapter, &crq);
3256
3257 crq.query_capability.capability =
3258 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3259 atomic_inc(&adapter->running_cap_crqs);
3260 ibmvnic_send_crq(adapter, &crq);
3261
3262 crq.query_capability.capability =
3263 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3264 atomic_inc(&adapter->running_cap_crqs);
3265 ibmvnic_send_crq(adapter, &crq);
3266
3267 crq.query_capability.capability =
3268 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3269 atomic_inc(&adapter->running_cap_crqs);
3270 ibmvnic_send_crq(adapter, &crq);
3271
3272 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3273 atomic_inc(&adapter->running_cap_crqs);
3274 ibmvnic_send_crq(adapter, &crq);
3275 }
3276
3277 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3278 struct ibmvnic_adapter *adapter)
3279 {
3280 struct device *dev = &adapter->vdev->dev;
3281
3282 if (crq->get_vpd_size_rsp.rc.code) {
3283 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3284 crq->get_vpd_size_rsp.rc.code);
3285 complete(&adapter->fw_done);
3286 return;
3287 }
3288
3289 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3290 complete(&adapter->fw_done);
3291 }
3292
3293 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3294 struct ibmvnic_adapter *adapter)
3295 {
3296 struct device *dev = &adapter->vdev->dev;
3297 unsigned char *substr = NULL;
3298 u8 fw_level_len = 0;
3299
3300 memset(adapter->fw_version, 0, 32);
3301
3302 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3303 DMA_FROM_DEVICE);
3304
3305 if (crq->get_vpd_rsp.rc.code) {
3306 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3307 crq->get_vpd_rsp.rc.code);
3308 goto complete;
3309 }
3310
3311 /* get the position of the firmware version info
3312 * located after the ASCII 'RM' substring in the buffer
3313 */
3314 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3315 if (!substr) {
3316 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3317 goto complete;
3318 }
3319
3320 /* get length of firmware level ASCII substring */
3321 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3322 fw_level_len = *(substr + 2);
3323 } else {
3324 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3325 goto complete;
3326 }
3327
3328 /* copy firmware version string from vpd into adapter */
3329 if ((substr + 3 + fw_level_len) <
3330 (adapter->vpd->buff + adapter->vpd->len)) {
3331 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3332 } else {
3333 dev_info(dev, "FW substr extrapolated VPD buff\n");
3334 }
3335
3336 complete:
3337 if (adapter->fw_version[0] == '\0')
3338 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3339 complete(&adapter->fw_done);
3340 }
3341
3342 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3343 {
3344 struct device *dev = &adapter->vdev->dev;
3345 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3346 union ibmvnic_crq crq;
3347 int i;
3348
3349 dma_unmap_single(dev, adapter->ip_offload_tok,
3350 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3351
3352 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3353 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3354 netdev_dbg(adapter->netdev, "%016lx\n",
3355 ((unsigned long int *)(buf))[i]);
3356
3357 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3358 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3359 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3360 buf->tcp_ipv4_chksum);
3361 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3362 buf->tcp_ipv6_chksum);
3363 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3364 buf->udp_ipv4_chksum);
3365 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3366 buf->udp_ipv6_chksum);
3367 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3368 buf->large_tx_ipv4);
3369 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3370 buf->large_tx_ipv6);
3371 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3372 buf->large_rx_ipv4);
3373 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3374 buf->large_rx_ipv6);
3375 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3376 buf->max_ipv4_header_size);
3377 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3378 buf->max_ipv6_header_size);
3379 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3380 buf->max_tcp_header_size);
3381 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3382 buf->max_udp_header_size);
3383 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3384 buf->max_large_tx_size);
3385 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3386 buf->max_large_rx_size);
3387 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3388 buf->ipv6_extension_header);
3389 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3390 buf->tcp_pseudosum_req);
3391 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3392 buf->num_ipv6_ext_headers);
3393 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3394 buf->off_ipv6_ext_headers);
3395
3396 adapter->ip_offload_ctrl_tok =
3397 dma_map_single(dev, &adapter->ip_offload_ctrl,
3398 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3399
3400 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3401 dev_err(dev, "Couldn't map ip offload control buffer\n");
3402 return;
3403 }
3404
3405 adapter->ip_offload_ctrl.len =
3406 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3407 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3408 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3409 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3410 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3411 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3412 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3413 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3414 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3415 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3416
3417 /* large_rx disabled for now, additional features needed */
3418 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3419 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3420
3421 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3422
3423 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3424 adapter->netdev->features |= NETIF_F_IP_CSUM;
3425
3426 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3427 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3428
3429 if ((adapter->netdev->features &
3430 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3431 adapter->netdev->features |= NETIF_F_RXCSUM;
3432
3433 if (buf->large_tx_ipv4)
3434 adapter->netdev->features |= NETIF_F_TSO;
3435 if (buf->large_tx_ipv6)
3436 adapter->netdev->features |= NETIF_F_TSO6;
3437
3438 adapter->netdev->hw_features |= adapter->netdev->features;
3439
3440 memset(&crq, 0, sizeof(crq));
3441 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3442 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3443 crq.control_ip_offload.len =
3444 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3445 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3446 ibmvnic_send_crq(adapter, &crq);
3447 }
3448
3449 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3450 struct ibmvnic_adapter *adapter)
3451 {
3452 struct device *dev = &adapter->vdev->dev;
3453 struct ibmvnic_error_buff *error_buff, *tmp;
3454 unsigned long flags;
3455 bool found = false;
3456 int i;
3457
3458 if (!crq->request_error_rsp.rc.code) {
3459 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3460 crq->request_error_rsp.rc.code);
3461 return;
3462 }
3463
3464 spin_lock_irqsave(&adapter->error_list_lock, flags);
3465 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3466 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3467 found = true;
3468 list_del(&error_buff->list);
3469 break;
3470 }
3471 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3472
3473 if (!found) {
3474 dev_err(dev, "Couldn't find error id %x\n",
3475 be32_to_cpu(crq->request_error_rsp.error_id));
3476 return;
3477 }
3478
3479 dev_err(dev, "Detailed info for error id %x:",
3480 be32_to_cpu(crq->request_error_rsp.error_id));
3481
3482 for (i = 0; i < error_buff->len; i++) {
3483 pr_cont("%02x", (int)error_buff->buff[i]);
3484 if (i % 8 == 7)
3485 pr_cont(" ");
3486 }
3487 pr_cont("\n");
3488
3489 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3490 DMA_FROM_DEVICE);
3491 kfree(error_buff->buff);
3492 kfree(error_buff);
3493 }
3494
3495 static void request_error_information(struct ibmvnic_adapter *adapter,
3496 union ibmvnic_crq *err_crq)
3497 {
3498 struct device *dev = &adapter->vdev->dev;
3499 struct net_device *netdev = adapter->netdev;
3500 struct ibmvnic_error_buff *error_buff;
3501 unsigned long timeout = msecs_to_jiffies(30000);
3502 union ibmvnic_crq crq;
3503 unsigned long flags;
3504 int rc, detail_len;
3505
3506 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3507 if (!error_buff)
3508 return;
3509
3510 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3511 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3512 if (!error_buff->buff) {
3513 kfree(error_buff);
3514 return;
3515 }
3516
3517 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3518 DMA_FROM_DEVICE);
3519 if (dma_mapping_error(dev, error_buff->dma)) {
3520 netdev_err(netdev, "Couldn't map error buffer\n");
3521 kfree(error_buff->buff);
3522 kfree(error_buff);
3523 return;
3524 }
3525
3526 error_buff->len = detail_len;
3527 error_buff->error_id = err_crq->error_indication.error_id;
3528
3529 spin_lock_irqsave(&adapter->error_list_lock, flags);
3530 list_add_tail(&error_buff->list, &adapter->errors);
3531 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3532
3533 memset(&crq, 0, sizeof(crq));
3534 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3535 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3536 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3537 crq.request_error_info.len = cpu_to_be32(detail_len);
3538 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3539
3540 rc = ibmvnic_send_crq(adapter, &crq);
3541 if (rc) {
3542 netdev_err(netdev, "failed to request error information\n");
3543 goto err_info_fail;
3544 }
3545
3546 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3547 netdev_err(netdev, "timeout waiting for error information\n");
3548 goto err_info_fail;
3549 }
3550
3551 return;
3552
3553 err_info_fail:
3554 spin_lock_irqsave(&adapter->error_list_lock, flags);
3555 list_del(&error_buff->list);
3556 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3557
3558 kfree(error_buff->buff);
3559 kfree(error_buff);
3560 }
3561
3562 static void handle_error_indication(union ibmvnic_crq *crq,
3563 struct ibmvnic_adapter *adapter)
3564 {
3565 struct device *dev = &adapter->vdev->dev;
3566
3567 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3568 crq->error_indication.flags
3569 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3570 be32_to_cpu(crq->error_indication.error_id),
3571 be16_to_cpu(crq->error_indication.error_cause));
3572
3573 if (be32_to_cpu(crq->error_indication.error_id))
3574 request_error_information(adapter, crq);
3575
3576 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3577 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3578 else
3579 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3580 }
3581
3582 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3583 struct ibmvnic_adapter *adapter)
3584 {
3585 struct net_device *netdev = adapter->netdev;
3586 struct device *dev = &adapter->vdev->dev;
3587 long rc;
3588
3589 rc = crq->change_mac_addr_rsp.rc.code;
3590 if (rc) {
3591 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3592 goto out;
3593 }
3594 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3595 ETH_ALEN);
3596 out:
3597 complete(&adapter->fw_done);
3598 return rc;
3599 }
3600
3601 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3602 struct ibmvnic_adapter *adapter)
3603 {
3604 struct device *dev = &adapter->vdev->dev;
3605 u64 *req_value;
3606 char *name;
3607
3608 atomic_dec(&adapter->running_cap_crqs);
3609 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3610 case REQ_TX_QUEUES:
3611 req_value = &adapter->req_tx_queues;
3612 name = "tx";
3613 break;
3614 case REQ_RX_QUEUES:
3615 req_value = &adapter->req_rx_queues;
3616 name = "rx";
3617 break;
3618 case REQ_RX_ADD_QUEUES:
3619 req_value = &adapter->req_rx_add_queues;
3620 name = "rx_add";
3621 break;
3622 case REQ_TX_ENTRIES_PER_SUBCRQ:
3623 req_value = &adapter->req_tx_entries_per_subcrq;
3624 name = "tx_entries_per_subcrq";
3625 break;
3626 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3627 req_value = &adapter->req_rx_add_entries_per_subcrq;
3628 name = "rx_add_entries_per_subcrq";
3629 break;
3630 case REQ_MTU:
3631 req_value = &adapter->req_mtu;
3632 name = "mtu";
3633 break;
3634 case PROMISC_REQUESTED:
3635 req_value = &adapter->promisc;
3636 name = "promisc";
3637 break;
3638 default:
3639 dev_err(dev, "Got invalid cap request rsp %d\n",
3640 crq->request_capability.capability);
3641 return;
3642 }
3643
3644 switch (crq->request_capability_rsp.rc.code) {
3645 case SUCCESS:
3646 break;
3647 case PARTIALSUCCESS:
3648 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3649 *req_value,
3650 (long int)be64_to_cpu(crq->request_capability_rsp.
3651 number), name);
3652
3653 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3654 REQ_MTU) {
3655 pr_err("mtu of %llu is not supported. Reverting.\n",
3656 *req_value);
3657 *req_value = adapter->fallback.mtu;
3658 } else {
3659 *req_value =
3660 be64_to_cpu(crq->request_capability_rsp.number);
3661 }
3662
3663 ibmvnic_send_req_caps(adapter, 1);
3664 return;
3665 default:
3666 dev_err(dev, "Error %d in request cap rsp\n",
3667 crq->request_capability_rsp.rc.code);
3668 return;
3669 }
3670
3671 /* Done receiving requested capabilities, query IP offload support */
3672 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3673 union ibmvnic_crq newcrq;
3674 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3675 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3676 &adapter->ip_offload_buf;
3677
3678 adapter->wait_capability = false;
3679 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3680 buf_sz,
3681 DMA_FROM_DEVICE);
3682
3683 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3684 if (!firmware_has_feature(FW_FEATURE_CMO))
3685 dev_err(dev, "Couldn't map offload buffer\n");
3686 return;
3687 }
3688
3689 memset(&newcrq, 0, sizeof(newcrq));
3690 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3691 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3692 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3693 newcrq.query_ip_offload.ioba =
3694 cpu_to_be32(adapter->ip_offload_tok);
3695
3696 ibmvnic_send_crq(adapter, &newcrq);
3697 }
3698 }
3699
3700 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3701 struct ibmvnic_adapter *adapter)
3702 {
3703 struct device *dev = &adapter->vdev->dev;
3704 struct net_device *netdev = adapter->netdev;
3705 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3706 struct ibmvnic_login_buffer *login = adapter->login_buf;
3707 int i;
3708
3709 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3710 DMA_BIDIRECTIONAL);
3711 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3712 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3713
3714 /* If the number of queues requested can't be allocated by the
3715 * server, the login response will return with code 1. We will need
3716 * to resend the login buffer with fewer queues requested.
3717 */
3718 if (login_rsp_crq->generic.rc.code) {
3719 adapter->renegotiate = true;
3720 complete(&adapter->init_done);
3721 return 0;
3722 }
3723
3724 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3725
3726 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3727 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3728 netdev_dbg(adapter->netdev, "%016lx\n",
3729 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3730 }
3731
3732 /* Sanity checks */
3733 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3734 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3735 adapter->req_rx_add_queues !=
3736 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3737 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3738 ibmvnic_remove(adapter->vdev);
3739 return -EIO;
3740 }
3741 complete(&adapter->init_done);
3742
3743 return 0;
3744 }
3745
3746 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3747 struct ibmvnic_adapter *adapter)
3748 {
3749 struct device *dev = &adapter->vdev->dev;
3750 long rc;
3751
3752 rc = crq->request_unmap_rsp.rc.code;
3753 if (rc)
3754 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3755 }
3756
3757 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3758 struct ibmvnic_adapter *adapter)
3759 {
3760 struct net_device *netdev = adapter->netdev;
3761 struct device *dev = &adapter->vdev->dev;
3762 long rc;
3763
3764 rc = crq->query_map_rsp.rc.code;
3765 if (rc) {
3766 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3767 return;
3768 }
3769 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3770 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3771 crq->query_map_rsp.free_pages);
3772 }
3773
3774 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3775 struct ibmvnic_adapter *adapter)
3776 {
3777 struct net_device *netdev = adapter->netdev;
3778 struct device *dev = &adapter->vdev->dev;
3779 long rc;
3780
3781 atomic_dec(&adapter->running_cap_crqs);
3782 netdev_dbg(netdev, "Outstanding queries: %d\n",
3783 atomic_read(&adapter->running_cap_crqs));
3784 rc = crq->query_capability.rc.code;
3785 if (rc) {
3786 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3787 goto out;
3788 }
3789
3790 switch (be16_to_cpu(crq->query_capability.capability)) {
3791 case MIN_TX_QUEUES:
3792 adapter->min_tx_queues =
3793 be64_to_cpu(crq->query_capability.number);
3794 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3795 adapter->min_tx_queues);
3796 break;
3797 case MIN_RX_QUEUES:
3798 adapter->min_rx_queues =
3799 be64_to_cpu(crq->query_capability.number);
3800 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3801 adapter->min_rx_queues);
3802 break;
3803 case MIN_RX_ADD_QUEUES:
3804 adapter->min_rx_add_queues =
3805 be64_to_cpu(crq->query_capability.number);
3806 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3807 adapter->min_rx_add_queues);
3808 break;
3809 case MAX_TX_QUEUES:
3810 adapter->max_tx_queues =
3811 be64_to_cpu(crq->query_capability.number);
3812 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3813 adapter->max_tx_queues);
3814 break;
3815 case MAX_RX_QUEUES:
3816 adapter->max_rx_queues =
3817 be64_to_cpu(crq->query_capability.number);
3818 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3819 adapter->max_rx_queues);
3820 break;
3821 case MAX_RX_ADD_QUEUES:
3822 adapter->max_rx_add_queues =
3823 be64_to_cpu(crq->query_capability.number);
3824 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3825 adapter->max_rx_add_queues);
3826 break;
3827 case MIN_TX_ENTRIES_PER_SUBCRQ:
3828 adapter->min_tx_entries_per_subcrq =
3829 be64_to_cpu(crq->query_capability.number);
3830 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3831 adapter->min_tx_entries_per_subcrq);
3832 break;
3833 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3834 adapter->min_rx_add_entries_per_subcrq =
3835 be64_to_cpu(crq->query_capability.number);
3836 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3837 adapter->min_rx_add_entries_per_subcrq);
3838 break;
3839 case MAX_TX_ENTRIES_PER_SUBCRQ:
3840 adapter->max_tx_entries_per_subcrq =
3841 be64_to_cpu(crq->query_capability.number);
3842 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3843 adapter->max_tx_entries_per_subcrq);
3844 break;
3845 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3846 adapter->max_rx_add_entries_per_subcrq =
3847 be64_to_cpu(crq->query_capability.number);
3848 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3849 adapter->max_rx_add_entries_per_subcrq);
3850 break;
3851 case TCP_IP_OFFLOAD:
3852 adapter->tcp_ip_offload =
3853 be64_to_cpu(crq->query_capability.number);
3854 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3855 adapter->tcp_ip_offload);
3856 break;
3857 case PROMISC_SUPPORTED:
3858 adapter->promisc_supported =
3859 be64_to_cpu(crq->query_capability.number);
3860 netdev_dbg(netdev, "promisc_supported = %lld\n",
3861 adapter->promisc_supported);
3862 break;
3863 case MIN_MTU:
3864 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3865 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3866 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3867 break;
3868 case MAX_MTU:
3869 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3870 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3871 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3872 break;
3873 case MAX_MULTICAST_FILTERS:
3874 adapter->max_multicast_filters =
3875 be64_to_cpu(crq->query_capability.number);
3876 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3877 adapter->max_multicast_filters);
3878 break;
3879 case VLAN_HEADER_INSERTION:
3880 adapter->vlan_header_insertion =
3881 be64_to_cpu(crq->query_capability.number);
3882 if (adapter->vlan_header_insertion)
3883 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3884 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3885 adapter->vlan_header_insertion);
3886 break;
3887 case RX_VLAN_HEADER_INSERTION:
3888 adapter->rx_vlan_header_insertion =
3889 be64_to_cpu(crq->query_capability.number);
3890 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3891 adapter->rx_vlan_header_insertion);
3892 break;
3893 case MAX_TX_SG_ENTRIES:
3894 adapter->max_tx_sg_entries =
3895 be64_to_cpu(crq->query_capability.number);
3896 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3897 adapter->max_tx_sg_entries);
3898 break;
3899 case RX_SG_SUPPORTED:
3900 adapter->rx_sg_supported =
3901 be64_to_cpu(crq->query_capability.number);
3902 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3903 adapter->rx_sg_supported);
3904 break;
3905 case OPT_TX_COMP_SUB_QUEUES:
3906 adapter->opt_tx_comp_sub_queues =
3907 be64_to_cpu(crq->query_capability.number);
3908 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3909 adapter->opt_tx_comp_sub_queues);
3910 break;
3911 case OPT_RX_COMP_QUEUES:
3912 adapter->opt_rx_comp_queues =
3913 be64_to_cpu(crq->query_capability.number);
3914 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3915 adapter->opt_rx_comp_queues);
3916 break;
3917 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3918 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3919 be64_to_cpu(crq->query_capability.number);
3920 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3921 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3922 break;
3923 case OPT_TX_ENTRIES_PER_SUBCRQ:
3924 adapter->opt_tx_entries_per_subcrq =
3925 be64_to_cpu(crq->query_capability.number);
3926 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3927 adapter->opt_tx_entries_per_subcrq);
3928 break;
3929 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3930 adapter->opt_rxba_entries_per_subcrq =
3931 be64_to_cpu(crq->query_capability.number);
3932 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3933 adapter->opt_rxba_entries_per_subcrq);
3934 break;
3935 case TX_RX_DESC_REQ:
3936 adapter->tx_rx_desc_req = crq->query_capability.number;
3937 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3938 adapter->tx_rx_desc_req);
3939 break;
3940
3941 default:
3942 netdev_err(netdev, "Got invalid cap rsp %d\n",
3943 crq->query_capability.capability);
3944 }
3945
3946 out:
3947 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3948 adapter->wait_capability = false;
3949 ibmvnic_send_req_caps(adapter, 0);
3950 }
3951 }
3952
3953 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3954 struct ibmvnic_adapter *adapter)
3955 {
3956 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3957 struct net_device *netdev = adapter->netdev;
3958 struct device *dev = &adapter->vdev->dev;
3959 u64 *u64_crq = (u64 *)crq;
3960 long rc;
3961
3962 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3963 (unsigned long int)cpu_to_be64(u64_crq[0]),
3964 (unsigned long int)cpu_to_be64(u64_crq[1]));
3965 switch (gen_crq->first) {
3966 case IBMVNIC_CRQ_INIT_RSP:
3967 switch (gen_crq->cmd) {
3968 case IBMVNIC_CRQ_INIT:
3969 dev_info(dev, "Partner initialized\n");
3970 adapter->from_passive_init = true;
3971 complete(&adapter->init_done);
3972 break;
3973 case IBMVNIC_CRQ_INIT_COMPLETE:
3974 dev_info(dev, "Partner initialization complete\n");
3975 send_version_xchg(adapter);
3976 break;
3977 default:
3978 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3979 }
3980 return;
3981 case IBMVNIC_CRQ_XPORT_EVENT:
3982 netif_carrier_off(netdev);
3983 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3984 dev_info(dev, "Migrated, re-enabling adapter\n");
3985 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3986 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3987 dev_info(dev, "Backing device failover detected\n");
3988 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3989 } else {
3990 /* The adapter lost the connection */
3991 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3992 gen_crq->cmd);
3993 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3994 }
3995 return;
3996 case IBMVNIC_CRQ_CMD_RSP:
3997 break;
3998 default:
3999 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4000 gen_crq->first);
4001 return;
4002 }
4003
4004 switch (gen_crq->cmd) {
4005 case VERSION_EXCHANGE_RSP:
4006 rc = crq->version_exchange_rsp.rc.code;
4007 if (rc) {
4008 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4009 break;
4010 }
4011 dev_info(dev, "Partner protocol version is %d\n",
4012 crq->version_exchange_rsp.version);
4013 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4014 ibmvnic_version)
4015 ibmvnic_version =
4016 be16_to_cpu(crq->version_exchange_rsp.version);
4017 send_cap_queries(adapter);
4018 break;
4019 case QUERY_CAPABILITY_RSP:
4020 handle_query_cap_rsp(crq, adapter);
4021 break;
4022 case QUERY_MAP_RSP:
4023 handle_query_map_rsp(crq, adapter);
4024 break;
4025 case REQUEST_MAP_RSP:
4026 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4027 complete(&adapter->fw_done);
4028 break;
4029 case REQUEST_UNMAP_RSP:
4030 handle_request_unmap_rsp(crq, adapter);
4031 break;
4032 case REQUEST_CAPABILITY_RSP:
4033 handle_request_cap_rsp(crq, adapter);
4034 break;
4035 case LOGIN_RSP:
4036 netdev_dbg(netdev, "Got Login Response\n");
4037 handle_login_rsp(crq, adapter);
4038 break;
4039 case LOGICAL_LINK_STATE_RSP:
4040 netdev_dbg(netdev,
4041 "Got Logical Link State Response, state: %d rc: %d\n",
4042 crq->logical_link_state_rsp.link_state,
4043 crq->logical_link_state_rsp.rc.code);
4044 adapter->logical_link_state =
4045 crq->logical_link_state_rsp.link_state;
4046 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4047 complete(&adapter->init_done);
4048 break;
4049 case LINK_STATE_INDICATION:
4050 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4051 adapter->phys_link_state =
4052 crq->link_state_indication.phys_link_state;
4053 adapter->logical_link_state =
4054 crq->link_state_indication.logical_link_state;
4055 break;
4056 case CHANGE_MAC_ADDR_RSP:
4057 netdev_dbg(netdev, "Got MAC address change Response\n");
4058 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4059 break;
4060 case ERROR_INDICATION:
4061 netdev_dbg(netdev, "Got Error Indication\n");
4062 handle_error_indication(crq, adapter);
4063 break;
4064 case REQUEST_ERROR_RSP:
4065 netdev_dbg(netdev, "Got Error Detail Response\n");
4066 handle_error_info_rsp(crq, adapter);
4067 break;
4068 case REQUEST_STATISTICS_RSP:
4069 netdev_dbg(netdev, "Got Statistics Response\n");
4070 complete(&adapter->stats_done);
4071 break;
4072 case QUERY_IP_OFFLOAD_RSP:
4073 netdev_dbg(netdev, "Got Query IP offload Response\n");
4074 handle_query_ip_offload_rsp(adapter);
4075 break;
4076 case MULTICAST_CTRL_RSP:
4077 netdev_dbg(netdev, "Got multicast control Response\n");
4078 break;
4079 case CONTROL_IP_OFFLOAD_RSP:
4080 netdev_dbg(netdev, "Got Control IP offload Response\n");
4081 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4082 sizeof(adapter->ip_offload_ctrl),
4083 DMA_TO_DEVICE);
4084 complete(&adapter->init_done);
4085 break;
4086 case COLLECT_FW_TRACE_RSP:
4087 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4088 complete(&adapter->fw_done);
4089 break;
4090 case GET_VPD_SIZE_RSP:
4091 handle_vpd_size_rsp(crq, adapter);
4092 break;
4093 case GET_VPD_RSP:
4094 handle_vpd_rsp(crq, adapter);
4095 break;
4096 default:
4097 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4098 gen_crq->cmd);
4099 }
4100 }
4101
4102 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4103 {
4104 struct ibmvnic_adapter *adapter = instance;
4105
4106 tasklet_schedule(&adapter->tasklet);
4107 return IRQ_HANDLED;
4108 }
4109
4110 static void ibmvnic_tasklet(void *data)
4111 {
4112 struct ibmvnic_adapter *adapter = data;
4113 struct ibmvnic_crq_queue *queue = &adapter->crq;
4114 union ibmvnic_crq *crq;
4115 unsigned long flags;
4116 bool done = false;
4117
4118 spin_lock_irqsave(&queue->lock, flags);
4119 while (!done) {
4120 /* Pull all the valid messages off the CRQ */
4121 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4122 ibmvnic_handle_crq(crq, adapter);
4123 crq->generic.first = 0;
4124 }
4125
4126 /* remain in tasklet until all
4127 * capabilities responses are received
4128 */
4129 if (!adapter->wait_capability)
4130 done = true;
4131 }
4132 /* if capabilities CRQ's were sent in this tasklet, the following
4133 * tasklet must wait until all responses are received
4134 */
4135 if (atomic_read(&adapter->running_cap_crqs) != 0)
4136 adapter->wait_capability = true;
4137 spin_unlock_irqrestore(&queue->lock, flags);
4138 }
4139
4140 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4141 {
4142 struct vio_dev *vdev = adapter->vdev;
4143 int rc;
4144
4145 do {
4146 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4147 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4148
4149 if (rc)
4150 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4151
4152 return rc;
4153 }
4154
4155 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4156 {
4157 struct ibmvnic_crq_queue *crq = &adapter->crq;
4158 struct device *dev = &adapter->vdev->dev;
4159 struct vio_dev *vdev = adapter->vdev;
4160 int rc;
4161
4162 /* Close the CRQ */
4163 do {
4164 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4165 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4166
4167 /* Clean out the queue */
4168 memset(crq->msgs, 0, PAGE_SIZE);
4169 crq->cur = 0;
4170
4171 /* And re-open it again */
4172 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4173 crq->msg_token, PAGE_SIZE);
4174
4175 if (rc == H_CLOSED)
4176 /* Adapter is good, but other end is not ready */
4177 dev_warn(dev, "Partner adapter not ready\n");
4178 else if (rc != 0)
4179 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4180
4181 return rc;
4182 }
4183
4184 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4185 {
4186 struct ibmvnic_crq_queue *crq = &adapter->crq;
4187 struct vio_dev *vdev = adapter->vdev;
4188 long rc;
4189
4190 if (!crq->msgs)
4191 return;
4192
4193 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4194 free_irq(vdev->irq, adapter);
4195 tasklet_kill(&adapter->tasklet);
4196 do {
4197 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4198 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4199
4200 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4201 DMA_BIDIRECTIONAL);
4202 free_page((unsigned long)crq->msgs);
4203 crq->msgs = NULL;
4204 }
4205
4206 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4207 {
4208 struct ibmvnic_crq_queue *crq = &adapter->crq;
4209 struct device *dev = &adapter->vdev->dev;
4210 struct vio_dev *vdev = adapter->vdev;
4211 int rc, retrc = -ENOMEM;
4212
4213 if (crq->msgs)
4214 return 0;
4215
4216 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4217 /* Should we allocate more than one page? */
4218
4219 if (!crq->msgs)
4220 return -ENOMEM;
4221
4222 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4223 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4224 DMA_BIDIRECTIONAL);
4225 if (dma_mapping_error(dev, crq->msg_token))
4226 goto map_failed;
4227
4228 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4229 crq->msg_token, PAGE_SIZE);
4230
4231 if (rc == H_RESOURCE)
4232 /* maybe kexecing and resource is busy. try a reset */
4233 rc = ibmvnic_reset_crq(adapter);
4234 retrc = rc;
4235
4236 if (rc == H_CLOSED) {
4237 dev_warn(dev, "Partner adapter not ready\n");
4238 } else if (rc) {
4239 dev_warn(dev, "Error %d opening adapter\n", rc);
4240 goto reg_crq_failed;
4241 }
4242
4243 retrc = 0;
4244
4245 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4246 (unsigned long)adapter);
4247
4248 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4249 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4250 adapter);
4251 if (rc) {
4252 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4253 vdev->irq, rc);
4254 goto req_irq_failed;
4255 }
4256
4257 rc = vio_enable_interrupts(vdev);
4258 if (rc) {
4259 dev_err(dev, "Error %d enabling interrupts\n", rc);
4260 goto req_irq_failed;
4261 }
4262
4263 crq->cur = 0;
4264 spin_lock_init(&crq->lock);
4265
4266 return retrc;
4267
4268 req_irq_failed:
4269 tasklet_kill(&adapter->tasklet);
4270 do {
4271 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4272 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4273 reg_crq_failed:
4274 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4275 map_failed:
4276 free_page((unsigned long)crq->msgs);
4277 crq->msgs = NULL;
4278 return retrc;
4279 }
4280
4281 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4282 {
4283 struct device *dev = &adapter->vdev->dev;
4284 unsigned long timeout = msecs_to_jiffies(30000);
4285 int rc;
4286
4287 if (adapter->resetting && !adapter->wait_for_reset) {
4288 rc = ibmvnic_reset_crq(adapter);
4289 if (!rc)
4290 rc = vio_enable_interrupts(adapter->vdev);
4291 } else {
4292 rc = init_crq_queue(adapter);
4293 }
4294
4295 if (rc) {
4296 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4297 return rc;
4298 }
4299
4300 adapter->from_passive_init = false;
4301
4302 init_completion(&adapter->init_done);
4303 adapter->init_done_rc = 0;
4304 ibmvnic_send_crq_init(adapter);
4305 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4306 dev_err(dev, "Initialization sequence timed out\n");
4307 return -1;
4308 }
4309
4310 if (adapter->init_done_rc) {
4311 release_crq_queue(adapter);
4312 return adapter->init_done_rc;
4313 }
4314
4315 if (adapter->from_passive_init) {
4316 adapter->state = VNIC_OPEN;
4317 adapter->from_passive_init = false;
4318 return -1;
4319 }
4320
4321 if (adapter->resetting && !adapter->wait_for_reset)
4322 rc = reset_sub_crq_queues(adapter);
4323 else
4324 rc = init_sub_crqs(adapter);
4325 if (rc) {
4326 dev_err(dev, "Initialization of sub crqs failed\n");
4327 release_crq_queue(adapter);
4328 return rc;
4329 }
4330
4331 rc = init_sub_crq_irqs(adapter);
4332 if (rc) {
4333 dev_err(dev, "Failed to initialize sub crq irqs\n");
4334 release_crq_queue(adapter);
4335 }
4336
4337 return rc;
4338 }
4339
4340 static struct device_attribute dev_attr_failover;
4341
4342 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4343 {
4344 struct ibmvnic_adapter *adapter;
4345 struct net_device *netdev;
4346 unsigned char *mac_addr_p;
4347 int rc;
4348
4349 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4350 dev->unit_address);
4351
4352 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4353 VETH_MAC_ADDR, NULL);
4354 if (!mac_addr_p) {
4355 dev_err(&dev->dev,
4356 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4357 __FILE__, __LINE__);
4358 return 0;
4359 }
4360
4361 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4362 IBMVNIC_MAX_QUEUES);
4363 if (!netdev)
4364 return -ENOMEM;
4365
4366 adapter = netdev_priv(netdev);
4367 adapter->state = VNIC_PROBING;
4368 dev_set_drvdata(&dev->dev, netdev);
4369 adapter->vdev = dev;
4370 adapter->netdev = netdev;
4371
4372 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4373 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4374 netdev->irq = dev->irq;
4375 netdev->netdev_ops = &ibmvnic_netdev_ops;
4376 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4377 SET_NETDEV_DEV(netdev, &dev->dev);
4378
4379 spin_lock_init(&adapter->stats_lock);
4380
4381 INIT_LIST_HEAD(&adapter->errors);
4382 spin_lock_init(&adapter->error_list_lock);
4383
4384 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4385 INIT_LIST_HEAD(&adapter->rwi_list);
4386 mutex_init(&adapter->reset_lock);
4387 mutex_init(&adapter->rwi_lock);
4388 adapter->resetting = false;
4389
4390 adapter->mac_change_pending = false;
4391
4392 do {
4393 rc = ibmvnic_init(adapter);
4394 if (rc && rc != EAGAIN)
4395 goto ibmvnic_init_fail;
4396 } while (rc == EAGAIN);
4397
4398 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4399 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4400 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4401
4402 rc = device_create_file(&dev->dev, &dev_attr_failover);
4403 if (rc)
4404 goto ibmvnic_init_fail;
4405
4406 netif_carrier_off(netdev);
4407 rc = register_netdev(netdev);
4408 if (rc) {
4409 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4410 goto ibmvnic_register_fail;
4411 }
4412 dev_info(&dev->dev, "ibmvnic registered\n");
4413
4414 adapter->state = VNIC_PROBED;
4415
4416 adapter->wait_for_reset = false;
4417
4418 return 0;
4419
4420 ibmvnic_register_fail:
4421 device_remove_file(&dev->dev, &dev_attr_failover);
4422
4423 ibmvnic_init_fail:
4424 release_sub_crqs(adapter);
4425 release_crq_queue(adapter);
4426 free_netdev(netdev);
4427
4428 return rc;
4429 }
4430
4431 static int ibmvnic_remove(struct vio_dev *dev)
4432 {
4433 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4434 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4435
4436 adapter->state = VNIC_REMOVING;
4437 unregister_netdev(netdev);
4438 mutex_lock(&adapter->reset_lock);
4439
4440 release_resources(adapter);
4441 release_sub_crqs(adapter);
4442 release_crq_queue(adapter);
4443
4444 adapter->state = VNIC_REMOVED;
4445
4446 mutex_unlock(&adapter->reset_lock);
4447 device_remove_file(&dev->dev, &dev_attr_failover);
4448 free_netdev(netdev);
4449 dev_set_drvdata(&dev->dev, NULL);
4450
4451 return 0;
4452 }
4453
4454 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4455 const char *buf, size_t count)
4456 {
4457 struct net_device *netdev = dev_get_drvdata(dev);
4458 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4459 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4460 __be64 session_token;
4461 long rc;
4462
4463 if (!sysfs_streq(buf, "1"))
4464 return -EINVAL;
4465
4466 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4467 H_GET_SESSION_TOKEN, 0, 0, 0);
4468 if (rc) {
4469 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4470 rc);
4471 return -EINVAL;
4472 }
4473
4474 session_token = (__be64)retbuf[0];
4475 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4476 be64_to_cpu(session_token));
4477 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4478 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4479 if (rc) {
4480 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4481 rc);
4482 return -EINVAL;
4483 }
4484
4485 return count;
4486 }
4487
4488 static DEVICE_ATTR_WO(failover);
4489
4490 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4491 {
4492 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4493 struct ibmvnic_adapter *adapter;
4494 struct iommu_table *tbl;
4495 unsigned long ret = 0;
4496 int i;
4497
4498 tbl = get_iommu_table_base(&vdev->dev);
4499
4500 /* netdev inits at probe time along with the structures we need below*/
4501 if (!netdev)
4502 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4503
4504 adapter = netdev_priv(netdev);
4505
4506 ret += PAGE_SIZE; /* the crq message queue */
4507 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4508
4509 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4510 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4511
4512 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4513 i++)
4514 ret += adapter->rx_pool[i].size *
4515 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4516
4517 return ret;
4518 }
4519
4520 static int ibmvnic_resume(struct device *dev)
4521 {
4522 struct net_device *netdev = dev_get_drvdata(dev);
4523 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4524
4525 if (adapter->state != VNIC_OPEN)
4526 return 0;
4527
4528 tasklet_schedule(&adapter->tasklet);
4529
4530 return 0;
4531 }
4532
4533 static const struct vio_device_id ibmvnic_device_table[] = {
4534 {"network", "IBM,vnic"},
4535 {"", "" }
4536 };
4537 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4538
4539 static const struct dev_pm_ops ibmvnic_pm_ops = {
4540 .resume = ibmvnic_resume
4541 };
4542
4543 static struct vio_driver ibmvnic_driver = {
4544 .id_table = ibmvnic_device_table,
4545 .probe = ibmvnic_probe,
4546 .remove = ibmvnic_remove,
4547 .get_desired_dma = ibmvnic_get_desired_dma,
4548 .name = ibmvnic_driver_name,
4549 .pm = &ibmvnic_pm_ops,
4550 };
4551
4552 /* module functions */
4553 static int __init ibmvnic_module_init(void)
4554 {
4555 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4556 IBMVNIC_DRIVER_VERSION);
4557
4558 return vio_register_driver(&ibmvnic_driver);
4559 }
4560
4561 static void __exit ibmvnic_module_exit(void)
4562 {
4563 vio_unregister_driver(&ibmvnic_driver);
4564 }
4565
4566 module_init(ibmvnic_module_init);
4567 module_exit(ibmvnic_module_exit);
Linux with added FPC-III support