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Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-jammy-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
1 /**************************************************************************/
2 /* */
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
8 /* */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
13 /* */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
18 /* */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
21 /* */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
26 /* */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
36 /* */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
43 /* */
44 /**************************************************************************/
45
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
72 #include <asm/vio.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
78 #include <linux/utsname.h>
79
80 #include "ibmvnic.h"
81
82 static const char ibmvnic_driver_name[] = "ibmvnic";
83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84
85 MODULE_AUTHOR("Santiago Leon");
86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89
90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
91 static int ibmvnic_remove(struct vio_dev *);
92 static void release_sub_crqs(struct ibmvnic_adapter *);
93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
98 union sub_crq *sub_crq);
99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
101 static int enable_scrq_irq(struct ibmvnic_adapter *,
102 struct ibmvnic_sub_crq_queue *);
103 static int disable_scrq_irq(struct ibmvnic_adapter *,
104 struct ibmvnic_sub_crq_queue *);
105 static int pending_scrq(struct ibmvnic_adapter *,
106 struct ibmvnic_sub_crq_queue *);
107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
108 struct ibmvnic_sub_crq_queue *);
109 static int ibmvnic_poll(struct napi_struct *napi, int data);
110 static void send_map_query(struct ibmvnic_adapter *adapter);
111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
113 static void send_login(struct ibmvnic_adapter *adapter);
114 static void send_cap_queries(struct ibmvnic_adapter *adapter);
115 static int init_sub_crqs(struct ibmvnic_adapter *);
116 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
117 static int ibmvnic_init(struct ibmvnic_adapter *);
118 static void release_crq_queue(struct ibmvnic_adapter *);
119 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
120
121 struct ibmvnic_stat {
122 char name[ETH_GSTRING_LEN];
123 int offset;
124 };
125
126 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
127 offsetof(struct ibmvnic_statistics, stat))
128 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
129
130 static const struct ibmvnic_stat ibmvnic_stats[] = {
131 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
132 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
133 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
134 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
135 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
136 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
137 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
138 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
139 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
140 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
141 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
142 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
143 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
144 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
145 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
146 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
147 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
148 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
149 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
150 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
151 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
152 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
153 };
154
155 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
156 unsigned long length, unsigned long *number,
157 unsigned long *irq)
158 {
159 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
160 long rc;
161
162 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
163 *number = retbuf[0];
164 *irq = retbuf[1];
165
166 return rc;
167 }
168
169 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
170 struct ibmvnic_long_term_buff *ltb, int size)
171 {
172 struct device *dev = &adapter->vdev->dev;
173
174 ltb->size = size;
175 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
176 GFP_KERNEL);
177
178 if (!ltb->buff) {
179 dev_err(dev, "Couldn't alloc long term buffer\n");
180 return -ENOMEM;
181 }
182 ltb->map_id = adapter->map_id;
183 adapter->map_id++;
184
185 init_completion(&adapter->fw_done);
186 send_request_map(adapter, ltb->addr,
187 ltb->size, ltb->map_id);
188 wait_for_completion(&adapter->fw_done);
189
190 if (adapter->fw_done_rc) {
191 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
192 adapter->fw_done_rc);
193 return -1;
194 }
195 return 0;
196 }
197
198 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
199 struct ibmvnic_long_term_buff *ltb)
200 {
201 struct device *dev = &adapter->vdev->dev;
202
203 if (!ltb->buff)
204 return;
205
206 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
207 adapter->reset_reason != VNIC_RESET_MOBILITY)
208 send_request_unmap(adapter, ltb->map_id);
209 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
210 }
211
212 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
213 struct ibmvnic_long_term_buff *ltb)
214 {
215 memset(ltb->buff, 0, ltb->size);
216
217 init_completion(&adapter->fw_done);
218 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
219 wait_for_completion(&adapter->fw_done);
220
221 if (adapter->fw_done_rc) {
222 dev_info(&adapter->vdev->dev,
223 "Reset failed, attempting to free and reallocate buffer\n");
224 free_long_term_buff(adapter, ltb);
225 return alloc_long_term_buff(adapter, ltb, ltb->size);
226 }
227 return 0;
228 }
229
230 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
231 {
232 int i;
233
234 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
235 i++)
236 adapter->rx_pool[i].active = 0;
237 }
238
239 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
240 struct ibmvnic_rx_pool *pool)
241 {
242 int count = pool->size - atomic_read(&pool->available);
243 struct device *dev = &adapter->vdev->dev;
244 int buffers_added = 0;
245 unsigned long lpar_rc;
246 union sub_crq sub_crq;
247 struct sk_buff *skb;
248 unsigned int offset;
249 dma_addr_t dma_addr;
250 unsigned char *dst;
251 u64 *handle_array;
252 int shift = 0;
253 int index;
254 int i;
255
256 if (!pool->active)
257 return;
258
259 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
260 be32_to_cpu(adapter->login_rsp_buf->
261 off_rxadd_subcrqs));
262
263 for (i = 0; i < count; ++i) {
264 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
265 if (!skb) {
266 dev_err(dev, "Couldn't replenish rx buff\n");
267 adapter->replenish_no_mem++;
268 break;
269 }
270
271 index = pool->free_map[pool->next_free];
272
273 if (pool->rx_buff[index].skb)
274 dev_err(dev, "Inconsistent free_map!\n");
275
276 /* Copy the skb to the long term mapped DMA buffer */
277 offset = index * pool->buff_size;
278 dst = pool->long_term_buff.buff + offset;
279 memset(dst, 0, pool->buff_size);
280 dma_addr = pool->long_term_buff.addr + offset;
281 pool->rx_buff[index].data = dst;
282
283 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
284 pool->rx_buff[index].dma = dma_addr;
285 pool->rx_buff[index].skb = skb;
286 pool->rx_buff[index].pool_index = pool->index;
287 pool->rx_buff[index].size = pool->buff_size;
288
289 memset(&sub_crq, 0, sizeof(sub_crq));
290 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
291 sub_crq.rx_add.correlator =
292 cpu_to_be64((u64)&pool->rx_buff[index]);
293 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
294 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
295
296 /* The length field of the sCRQ is defined to be 24 bits so the
297 * buffer size needs to be left shifted by a byte before it is
298 * converted to big endian to prevent the last byte from being
299 * truncated.
300 */
301 #ifdef __LITTLE_ENDIAN__
302 shift = 8;
303 #endif
304 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
305
306 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
307 &sub_crq);
308 if (lpar_rc != H_SUCCESS)
309 goto failure;
310
311 buffers_added++;
312 adapter->replenish_add_buff_success++;
313 pool->next_free = (pool->next_free + 1) % pool->size;
314 }
315 atomic_add(buffers_added, &pool->available);
316 return;
317
318 failure:
319 dev_info(dev, "replenish pools failure\n");
320 pool->free_map[pool->next_free] = index;
321 pool->rx_buff[index].skb = NULL;
322 if (!dma_mapping_error(dev, dma_addr))
323 dma_unmap_single(dev, dma_addr, pool->buff_size,
324 DMA_FROM_DEVICE);
325
326 dev_kfree_skb_any(skb);
327 adapter->replenish_add_buff_failure++;
328 atomic_add(buffers_added, &pool->available);
329
330 if (lpar_rc == H_CLOSED) {
331 /* Disable buffer pool replenishment and report carrier off if
332 * queue is closed. Firmware guarantees that a signal will
333 * be sent to the driver, triggering a reset.
334 */
335 deactivate_rx_pools(adapter);
336 netif_carrier_off(adapter->netdev);
337 }
338 }
339
340 static void replenish_pools(struct ibmvnic_adapter *adapter)
341 {
342 int i;
343
344 adapter->replenish_task_cycles++;
345 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
346 i++) {
347 if (adapter->rx_pool[i].active)
348 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
349 }
350 }
351
352 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
353 {
354 kfree(adapter->tx_stats_buffers);
355 kfree(adapter->rx_stats_buffers);
356 }
357
358 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
359 {
360 adapter->tx_stats_buffers =
361 kcalloc(adapter->req_tx_queues,
362 sizeof(struct ibmvnic_tx_queue_stats),
363 GFP_KERNEL);
364 if (!adapter->tx_stats_buffers)
365 return -ENOMEM;
366
367 adapter->rx_stats_buffers =
368 kcalloc(adapter->req_rx_queues,
369 sizeof(struct ibmvnic_rx_queue_stats),
370 GFP_KERNEL);
371 if (!adapter->rx_stats_buffers)
372 return -ENOMEM;
373
374 return 0;
375 }
376
377 static void release_stats_token(struct ibmvnic_adapter *adapter)
378 {
379 struct device *dev = &adapter->vdev->dev;
380
381 if (!adapter->stats_token)
382 return;
383
384 dma_unmap_single(dev, adapter->stats_token,
385 sizeof(struct ibmvnic_statistics),
386 DMA_FROM_DEVICE);
387 adapter->stats_token = 0;
388 }
389
390 static int init_stats_token(struct ibmvnic_adapter *adapter)
391 {
392 struct device *dev = &adapter->vdev->dev;
393 dma_addr_t stok;
394
395 stok = dma_map_single(dev, &adapter->stats,
396 sizeof(struct ibmvnic_statistics),
397 DMA_FROM_DEVICE);
398 if (dma_mapping_error(dev, stok)) {
399 dev_err(dev, "Couldn't map stats buffer\n");
400 return -1;
401 }
402
403 adapter->stats_token = stok;
404 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
405 return 0;
406 }
407
408 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
409 {
410 struct ibmvnic_rx_pool *rx_pool;
411 int rx_scrqs;
412 int i, j, rc;
413 u64 *size_array;
414
415 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
416 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
417
418 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
419 for (i = 0; i < rx_scrqs; i++) {
420 rx_pool = &adapter->rx_pool[i];
421
422 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
423
424 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
425 free_long_term_buff(adapter, &rx_pool->long_term_buff);
426 rx_pool->buff_size = be64_to_cpu(size_array[i]);
427 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
428 rx_pool->size *
429 rx_pool->buff_size);
430 } else {
431 rc = reset_long_term_buff(adapter,
432 &rx_pool->long_term_buff);
433 }
434
435 if (rc)
436 return rc;
437
438 for (j = 0; j < rx_pool->size; j++)
439 rx_pool->free_map[j] = j;
440
441 memset(rx_pool->rx_buff, 0,
442 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
443
444 atomic_set(&rx_pool->available, 0);
445 rx_pool->next_alloc = 0;
446 rx_pool->next_free = 0;
447 rx_pool->active = 1;
448 }
449
450 return 0;
451 }
452
453 static void release_rx_pools(struct ibmvnic_adapter *adapter)
454 {
455 struct ibmvnic_rx_pool *rx_pool;
456 int i, j;
457
458 if (!adapter->rx_pool)
459 return;
460
461 for (i = 0; i < adapter->num_active_rx_pools; i++) {
462 rx_pool = &adapter->rx_pool[i];
463
464 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
465
466 kfree(rx_pool->free_map);
467 free_long_term_buff(adapter, &rx_pool->long_term_buff);
468
469 if (!rx_pool->rx_buff)
470 continue;
471
472 for (j = 0; j < rx_pool->size; j++) {
473 if (rx_pool->rx_buff[j].skb) {
474 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
475 rx_pool->rx_buff[i].skb = NULL;
476 }
477 }
478
479 kfree(rx_pool->rx_buff);
480 }
481
482 kfree(adapter->rx_pool);
483 adapter->rx_pool = NULL;
484 adapter->num_active_rx_pools = 0;
485 }
486
487 static int init_rx_pools(struct net_device *netdev)
488 {
489 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
490 struct device *dev = &adapter->vdev->dev;
491 struct ibmvnic_rx_pool *rx_pool;
492 int rxadd_subcrqs;
493 u64 *size_array;
494 int i, j;
495
496 rxadd_subcrqs =
497 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
498 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
499 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
500
501 adapter->rx_pool = kcalloc(rxadd_subcrqs,
502 sizeof(struct ibmvnic_rx_pool),
503 GFP_KERNEL);
504 if (!adapter->rx_pool) {
505 dev_err(dev, "Failed to allocate rx pools\n");
506 return -1;
507 }
508
509 adapter->num_active_rx_pools = 0;
510
511 for (i = 0; i < rxadd_subcrqs; i++) {
512 rx_pool = &adapter->rx_pool[i];
513
514 netdev_dbg(adapter->netdev,
515 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
516 i, adapter->req_rx_add_entries_per_subcrq,
517 be64_to_cpu(size_array[i]));
518
519 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
520 rx_pool->index = i;
521 rx_pool->buff_size = be64_to_cpu(size_array[i]);
522 rx_pool->active = 1;
523
524 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
525 GFP_KERNEL);
526 if (!rx_pool->free_map) {
527 release_rx_pools(adapter);
528 return -1;
529 }
530
531 rx_pool->rx_buff = kcalloc(rx_pool->size,
532 sizeof(struct ibmvnic_rx_buff),
533 GFP_KERNEL);
534 if (!rx_pool->rx_buff) {
535 dev_err(dev, "Couldn't alloc rx buffers\n");
536 release_rx_pools(adapter);
537 return -1;
538 }
539
540 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
541 rx_pool->size * rx_pool->buff_size)) {
542 release_rx_pools(adapter);
543 return -1;
544 }
545
546 for (j = 0; j < rx_pool->size; ++j)
547 rx_pool->free_map[j] = j;
548
549 atomic_set(&rx_pool->available, 0);
550 rx_pool->next_alloc = 0;
551 rx_pool->next_free = 0;
552 }
553
554 adapter->num_active_rx_pools = rxadd_subcrqs;
555
556 return 0;
557 }
558
559 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
560 {
561 struct ibmvnic_tx_pool *tx_pool;
562 int tx_scrqs;
563 int i, j, rc;
564
565 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
566 for (i = 0; i < tx_scrqs; i++) {
567 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
568
569 tx_pool = &adapter->tx_pool[i];
570
571 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
572 if (rc)
573 return rc;
574
575 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
576 if (rc)
577 return rc;
578
579 memset(tx_pool->tx_buff, 0,
580 adapter->req_tx_entries_per_subcrq *
581 sizeof(struct ibmvnic_tx_buff));
582
583 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
584 tx_pool->free_map[j] = j;
585
586 tx_pool->consumer_index = 0;
587 tx_pool->producer_index = 0;
588 tx_pool->tso_index = 0;
589 }
590
591 return 0;
592 }
593
594 static void release_vpd_data(struct ibmvnic_adapter *adapter)
595 {
596 if (!adapter->vpd)
597 return;
598
599 kfree(adapter->vpd->buff);
600 kfree(adapter->vpd);
601 }
602
603 static void release_tx_pools(struct ibmvnic_adapter *adapter)
604 {
605 struct ibmvnic_tx_pool *tx_pool;
606 int i;
607
608 if (!adapter->tx_pool)
609 return;
610
611 for (i = 0; i < adapter->num_active_tx_pools; i++) {
612 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
613 tx_pool = &adapter->tx_pool[i];
614 kfree(tx_pool->tx_buff);
615 free_long_term_buff(adapter, &tx_pool->long_term_buff);
616 free_long_term_buff(adapter, &tx_pool->tso_ltb);
617 kfree(tx_pool->free_map);
618 }
619
620 kfree(adapter->tx_pool);
621 adapter->tx_pool = NULL;
622 adapter->num_active_tx_pools = 0;
623 }
624
625 static int init_tx_pools(struct net_device *netdev)
626 {
627 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
628 struct device *dev = &adapter->vdev->dev;
629 struct ibmvnic_tx_pool *tx_pool;
630 int tx_subcrqs;
631 int i, j;
632
633 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
634 adapter->tx_pool = kcalloc(tx_subcrqs,
635 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
636 if (!adapter->tx_pool)
637 return -1;
638
639 adapter->num_active_tx_pools = 0;
640
641 for (i = 0; i < tx_subcrqs; i++) {
642 tx_pool = &adapter->tx_pool[i];
643
644 netdev_dbg(adapter->netdev,
645 "Initializing tx_pool[%d], %lld buffs\n",
646 i, adapter->req_tx_entries_per_subcrq);
647
648 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
649 sizeof(struct ibmvnic_tx_buff),
650 GFP_KERNEL);
651 if (!tx_pool->tx_buff) {
652 dev_err(dev, "tx pool buffer allocation failed\n");
653 release_tx_pools(adapter);
654 return -1;
655 }
656
657 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
658 adapter->req_tx_entries_per_subcrq *
659 adapter->req_mtu)) {
660 release_tx_pools(adapter);
661 return -1;
662 }
663
664 /* alloc TSO ltb */
665 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
666 IBMVNIC_TSO_BUFS *
667 IBMVNIC_TSO_BUF_SZ)) {
668 release_tx_pools(adapter);
669 return -1;
670 }
671
672 tx_pool->tso_index = 0;
673
674 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
675 sizeof(int), GFP_KERNEL);
676 if (!tx_pool->free_map) {
677 release_tx_pools(adapter);
678 return -1;
679 }
680
681 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
682 tx_pool->free_map[j] = j;
683
684 tx_pool->consumer_index = 0;
685 tx_pool->producer_index = 0;
686 }
687
688 adapter->num_active_tx_pools = tx_subcrqs;
689
690 return 0;
691 }
692
693 static void release_error_buffers(struct ibmvnic_adapter *adapter)
694 {
695 struct device *dev = &adapter->vdev->dev;
696 struct ibmvnic_error_buff *error_buff, *tmp;
697 unsigned long flags;
698
699 spin_lock_irqsave(&adapter->error_list_lock, flags);
700 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
701 list_del(&error_buff->list);
702 dma_unmap_single(dev, error_buff->dma, error_buff->len,
703 DMA_FROM_DEVICE);
704 kfree(error_buff->buff);
705 kfree(error_buff);
706 }
707 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
708 }
709
710 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
711 {
712 int i;
713
714 if (adapter->napi_enabled)
715 return;
716
717 for (i = 0; i < adapter->req_rx_queues; i++)
718 napi_enable(&adapter->napi[i]);
719
720 adapter->napi_enabled = true;
721 }
722
723 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
724 {
725 int i;
726
727 if (!adapter->napi_enabled)
728 return;
729
730 for (i = 0; i < adapter->req_rx_queues; i++) {
731 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
732 napi_disable(&adapter->napi[i]);
733 }
734
735 adapter->napi_enabled = false;
736 }
737
738 static int ibmvnic_login(struct net_device *netdev)
739 {
740 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
741 unsigned long timeout = msecs_to_jiffies(30000);
742 struct device *dev = &adapter->vdev->dev;
743 int rc;
744
745 do {
746 if (adapter->renegotiate) {
747 adapter->renegotiate = false;
748 release_sub_crqs(adapter);
749
750 reinit_completion(&adapter->init_done);
751 send_cap_queries(adapter);
752 if (!wait_for_completion_timeout(&adapter->init_done,
753 timeout)) {
754 dev_err(dev, "Capabilities query timeout\n");
755 return -1;
756 }
757 rc = init_sub_crqs(adapter);
758 if (rc) {
759 dev_err(dev,
760 "Initialization of SCRQ's failed\n");
761 return -1;
762 }
763 rc = init_sub_crq_irqs(adapter);
764 if (rc) {
765 dev_err(dev,
766 "Initialization of SCRQ's irqs failed\n");
767 return -1;
768 }
769 }
770
771 reinit_completion(&adapter->init_done);
772 send_login(adapter);
773 if (!wait_for_completion_timeout(&adapter->init_done,
774 timeout)) {
775 dev_err(dev, "Login timeout\n");
776 return -1;
777 }
778 } while (adapter->renegotiate);
779
780 /* handle pending MAC address changes after successful login */
781 if (adapter->mac_change_pending) {
782 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
783 adapter->mac_change_pending = false;
784 }
785
786 return 0;
787 }
788
789 static void release_resources(struct ibmvnic_adapter *adapter)
790 {
791 int i;
792
793 release_vpd_data(adapter);
794
795 release_tx_pools(adapter);
796 release_rx_pools(adapter);
797
798 release_stats_token(adapter);
799 release_stats_buffers(adapter);
800 release_error_buffers(adapter);
801
802 if (adapter->napi) {
803 for (i = 0; i < adapter->req_rx_queues; i++) {
804 if (&adapter->napi[i]) {
805 netdev_dbg(adapter->netdev,
806 "Releasing napi[%d]\n", i);
807 netif_napi_del(&adapter->napi[i]);
808 }
809 }
810 }
811 }
812
813 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
814 {
815 struct net_device *netdev = adapter->netdev;
816 unsigned long timeout = msecs_to_jiffies(30000);
817 union ibmvnic_crq crq;
818 bool resend;
819 int rc;
820
821 netdev_dbg(netdev, "setting link state %d\n", link_state);
822
823 memset(&crq, 0, sizeof(crq));
824 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
825 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
826 crq.logical_link_state.link_state = link_state;
827
828 do {
829 resend = false;
830
831 reinit_completion(&adapter->init_done);
832 rc = ibmvnic_send_crq(adapter, &crq);
833 if (rc) {
834 netdev_err(netdev, "Failed to set link state\n");
835 return rc;
836 }
837
838 if (!wait_for_completion_timeout(&adapter->init_done,
839 timeout)) {
840 netdev_err(netdev, "timeout setting link state\n");
841 return -1;
842 }
843
844 if (adapter->init_done_rc == 1) {
845 /* Partuial success, delay and re-send */
846 mdelay(1000);
847 resend = true;
848 }
849 } while (resend);
850
851 return 0;
852 }
853
854 static int set_real_num_queues(struct net_device *netdev)
855 {
856 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
857 int rc;
858
859 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
860 adapter->req_tx_queues, adapter->req_rx_queues);
861
862 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
863 if (rc) {
864 netdev_err(netdev, "failed to set the number of tx queues\n");
865 return rc;
866 }
867
868 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
869 if (rc)
870 netdev_err(netdev, "failed to set the number of rx queues\n");
871
872 return rc;
873 }
874
875 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
876 {
877 struct device *dev = &adapter->vdev->dev;
878 union ibmvnic_crq crq;
879 int len = 0;
880
881 if (adapter->vpd->buff)
882 len = adapter->vpd->len;
883
884 init_completion(&adapter->fw_done);
885 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
886 crq.get_vpd_size.cmd = GET_VPD_SIZE;
887 ibmvnic_send_crq(adapter, &crq);
888 wait_for_completion(&adapter->fw_done);
889
890 if (!adapter->vpd->len)
891 return -ENODATA;
892
893 if (!adapter->vpd->buff)
894 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
895 else if (adapter->vpd->len != len)
896 adapter->vpd->buff =
897 krealloc(adapter->vpd->buff,
898 adapter->vpd->len, GFP_KERNEL);
899
900 if (!adapter->vpd->buff) {
901 dev_err(dev, "Could allocate VPD buffer\n");
902 return -ENOMEM;
903 }
904
905 adapter->vpd->dma_addr =
906 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
907 DMA_FROM_DEVICE);
908 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
909 dev_err(dev, "Could not map VPD buffer\n");
910 kfree(adapter->vpd->buff);
911 return -ENOMEM;
912 }
913
914 reinit_completion(&adapter->fw_done);
915 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
916 crq.get_vpd.cmd = GET_VPD;
917 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
918 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
919 ibmvnic_send_crq(adapter, &crq);
920 wait_for_completion(&adapter->fw_done);
921
922 return 0;
923 }
924
925 static int init_resources(struct ibmvnic_adapter *adapter)
926 {
927 struct net_device *netdev = adapter->netdev;
928 int i, rc;
929
930 rc = set_real_num_queues(netdev);
931 if (rc)
932 return rc;
933
934 rc = init_stats_buffers(adapter);
935 if (rc)
936 return rc;
937
938 rc = init_stats_token(adapter);
939 if (rc)
940 return rc;
941
942 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
943 if (!adapter->vpd)
944 return -ENOMEM;
945
946 /* Vital Product Data (VPD) */
947 rc = ibmvnic_get_vpd(adapter);
948 if (rc) {
949 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
950 return rc;
951 }
952
953 adapter->map_id = 1;
954 adapter->napi = kcalloc(adapter->req_rx_queues,
955 sizeof(struct napi_struct), GFP_KERNEL);
956 if (!adapter->napi)
957 return -ENOMEM;
958
959 for (i = 0; i < adapter->req_rx_queues; i++) {
960 netdev_dbg(netdev, "Adding napi[%d]\n", i);
961 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
962 NAPI_POLL_WEIGHT);
963 }
964
965 send_map_query(adapter);
966
967 rc = init_rx_pools(netdev);
968 if (rc)
969 return rc;
970
971 rc = init_tx_pools(netdev);
972 return rc;
973 }
974
975 static int __ibmvnic_open(struct net_device *netdev)
976 {
977 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
978 enum vnic_state prev_state = adapter->state;
979 int i, rc;
980
981 adapter->state = VNIC_OPENING;
982 replenish_pools(adapter);
983 ibmvnic_napi_enable(adapter);
984
985 /* We're ready to receive frames, enable the sub-crq interrupts and
986 * set the logical link state to up
987 */
988 for (i = 0; i < adapter->req_rx_queues; i++) {
989 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
990 if (prev_state == VNIC_CLOSED)
991 enable_irq(adapter->rx_scrq[i]->irq);
992 else
993 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
994 }
995
996 for (i = 0; i < adapter->req_tx_queues; i++) {
997 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
998 if (prev_state == VNIC_CLOSED)
999 enable_irq(adapter->tx_scrq[i]->irq);
1000 else
1001 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1002 }
1003
1004 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1005 if (rc) {
1006 for (i = 0; i < adapter->req_rx_queues; i++)
1007 napi_disable(&adapter->napi[i]);
1008 release_resources(adapter);
1009 return rc;
1010 }
1011
1012 netif_tx_start_all_queues(netdev);
1013
1014 if (prev_state == VNIC_CLOSED) {
1015 for (i = 0; i < adapter->req_rx_queues; i++)
1016 napi_schedule(&adapter->napi[i]);
1017 }
1018
1019 adapter->state = VNIC_OPEN;
1020 return rc;
1021 }
1022
1023 static int ibmvnic_open(struct net_device *netdev)
1024 {
1025 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1026 int rc;
1027
1028 mutex_lock(&adapter->reset_lock);
1029
1030 if (adapter->state != VNIC_CLOSED) {
1031 rc = ibmvnic_login(netdev);
1032 if (rc) {
1033 mutex_unlock(&adapter->reset_lock);
1034 return rc;
1035 }
1036
1037 rc = init_resources(adapter);
1038 if (rc) {
1039 netdev_err(netdev, "failed to initialize resources\n");
1040 release_resources(adapter);
1041 mutex_unlock(&adapter->reset_lock);
1042 return rc;
1043 }
1044 }
1045
1046 rc = __ibmvnic_open(netdev);
1047 netif_carrier_on(netdev);
1048
1049 mutex_unlock(&adapter->reset_lock);
1050
1051 return rc;
1052 }
1053
1054 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1055 {
1056 struct ibmvnic_tx_pool *tx_pool;
1057 u64 tx_entries;
1058 int tx_scrqs;
1059 int i, j;
1060
1061 if (!adapter->tx_pool)
1062 return;
1063
1064 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1065 tx_entries = adapter->req_tx_entries_per_subcrq;
1066
1067 /* Free any remaining skbs in the tx buffer pools */
1068 for (i = 0; i < tx_scrqs; i++) {
1069 tx_pool = &adapter->tx_pool[i];
1070 if (!tx_pool)
1071 continue;
1072
1073 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1074 for (j = 0; j < tx_entries; j++) {
1075 if (tx_pool->tx_buff[j].skb) {
1076 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1077 tx_pool->tx_buff[j].skb = NULL;
1078 }
1079 }
1080 }
1081 }
1082
1083 static int __ibmvnic_close(struct net_device *netdev)
1084 {
1085 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1086 int rc = 0;
1087 int i;
1088
1089 adapter->state = VNIC_CLOSING;
1090
1091 /* ensure that transmissions are stopped if called by do_reset */
1092 if (adapter->resetting)
1093 netif_tx_disable(netdev);
1094 else
1095 netif_tx_stop_all_queues(netdev);
1096
1097 ibmvnic_napi_disable(adapter);
1098
1099 if (adapter->tx_scrq) {
1100 for (i = 0; i < adapter->req_tx_queues; i++)
1101 if (adapter->tx_scrq[i]->irq) {
1102 netdev_dbg(adapter->netdev,
1103 "Disabling tx_scrq[%d] irq\n", i);
1104 disable_irq(adapter->tx_scrq[i]->irq);
1105 }
1106 }
1107
1108 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1109 if (rc)
1110 return rc;
1111
1112 if (adapter->rx_scrq) {
1113 for (i = 0; i < adapter->req_rx_queues; i++) {
1114 int retries = 10;
1115
1116 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1117 retries--;
1118 mdelay(100);
1119
1120 if (retries == 0)
1121 break;
1122 }
1123
1124 if (adapter->rx_scrq[i]->irq) {
1125 netdev_dbg(adapter->netdev,
1126 "Disabling rx_scrq[%d] irq\n", i);
1127 disable_irq(adapter->rx_scrq[i]->irq);
1128 }
1129 }
1130 }
1131
1132 clean_tx_pools(adapter);
1133 adapter->state = VNIC_CLOSED;
1134 return rc;
1135 }
1136
1137 static int ibmvnic_close(struct net_device *netdev)
1138 {
1139 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1140 int rc;
1141
1142 mutex_lock(&adapter->reset_lock);
1143 rc = __ibmvnic_close(netdev);
1144 mutex_unlock(&adapter->reset_lock);
1145
1146 return rc;
1147 }
1148
1149 /**
1150 * build_hdr_data - creates L2/L3/L4 header data buffer
1151 * @hdr_field - bitfield determining needed headers
1152 * @skb - socket buffer
1153 * @hdr_len - array of header lengths
1154 * @tot_len - total length of data
1155 *
1156 * Reads hdr_field to determine which headers are needed by firmware.
1157 * Builds a buffer containing these headers. Saves individual header
1158 * lengths and total buffer length to be used to build descriptors.
1159 */
1160 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1161 int *hdr_len, u8 *hdr_data)
1162 {
1163 int len = 0;
1164 u8 *hdr;
1165
1166 hdr_len[0] = sizeof(struct ethhdr);
1167
1168 if (skb->protocol == htons(ETH_P_IP)) {
1169 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1170 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1171 hdr_len[2] = tcp_hdrlen(skb);
1172 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1173 hdr_len[2] = sizeof(struct udphdr);
1174 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1175 hdr_len[1] = sizeof(struct ipv6hdr);
1176 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1177 hdr_len[2] = tcp_hdrlen(skb);
1178 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1179 hdr_len[2] = sizeof(struct udphdr);
1180 }
1181
1182 memset(hdr_data, 0, 120);
1183 if ((hdr_field >> 6) & 1) {
1184 hdr = skb_mac_header(skb);
1185 memcpy(hdr_data, hdr, hdr_len[0]);
1186 len += hdr_len[0];
1187 }
1188
1189 if ((hdr_field >> 5) & 1) {
1190 hdr = skb_network_header(skb);
1191 memcpy(hdr_data + len, hdr, hdr_len[1]);
1192 len += hdr_len[1];
1193 }
1194
1195 if ((hdr_field >> 4) & 1) {
1196 hdr = skb_transport_header(skb);
1197 memcpy(hdr_data + len, hdr, hdr_len[2]);
1198 len += hdr_len[2];
1199 }
1200 return len;
1201 }
1202
1203 /**
1204 * create_hdr_descs - create header and header extension descriptors
1205 * @hdr_field - bitfield determining needed headers
1206 * @data - buffer containing header data
1207 * @len - length of data buffer
1208 * @hdr_len - array of individual header lengths
1209 * @scrq_arr - descriptor array
1210 *
1211 * Creates header and, if needed, header extension descriptors and
1212 * places them in a descriptor array, scrq_arr
1213 */
1214
1215 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1216 union sub_crq *scrq_arr)
1217 {
1218 union sub_crq hdr_desc;
1219 int tmp_len = len;
1220 int num_descs = 0;
1221 u8 *data, *cur;
1222 int tmp;
1223
1224 while (tmp_len > 0) {
1225 cur = hdr_data + len - tmp_len;
1226
1227 memset(&hdr_desc, 0, sizeof(hdr_desc));
1228 if (cur != hdr_data) {
1229 data = hdr_desc.hdr_ext.data;
1230 tmp = tmp_len > 29 ? 29 : tmp_len;
1231 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1232 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1233 hdr_desc.hdr_ext.len = tmp;
1234 } else {
1235 data = hdr_desc.hdr.data;
1236 tmp = tmp_len > 24 ? 24 : tmp_len;
1237 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1238 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1239 hdr_desc.hdr.len = tmp;
1240 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1241 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1242 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1243 hdr_desc.hdr.flag = hdr_field << 1;
1244 }
1245 memcpy(data, cur, tmp);
1246 tmp_len -= tmp;
1247 *scrq_arr = hdr_desc;
1248 scrq_arr++;
1249 num_descs++;
1250 }
1251
1252 return num_descs;
1253 }
1254
1255 /**
1256 * build_hdr_descs_arr - build a header descriptor array
1257 * @skb - socket buffer
1258 * @num_entries - number of descriptors to be sent
1259 * @subcrq - first TX descriptor
1260 * @hdr_field - bit field determining which headers will be sent
1261 *
1262 * This function will build a TX descriptor array with applicable
1263 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1264 */
1265
1266 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1267 int *num_entries, u8 hdr_field)
1268 {
1269 int hdr_len[3] = {0, 0, 0};
1270 int tot_len;
1271 u8 *hdr_data = txbuff->hdr_data;
1272
1273 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1274 txbuff->hdr_data);
1275 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1276 txbuff->indir_arr + 1);
1277 }
1278
1279 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1280 {
1281 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1282 int queue_num = skb_get_queue_mapping(skb);
1283 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1284 struct device *dev = &adapter->vdev->dev;
1285 struct ibmvnic_tx_buff *tx_buff = NULL;
1286 struct ibmvnic_sub_crq_queue *tx_scrq;
1287 struct ibmvnic_tx_pool *tx_pool;
1288 unsigned int tx_send_failed = 0;
1289 unsigned int tx_map_failed = 0;
1290 unsigned int tx_dropped = 0;
1291 unsigned int tx_packets = 0;
1292 unsigned int tx_bytes = 0;
1293 dma_addr_t data_dma_addr;
1294 struct netdev_queue *txq;
1295 unsigned long lpar_rc;
1296 union sub_crq tx_crq;
1297 unsigned int offset;
1298 int num_entries = 1;
1299 unsigned char *dst;
1300 u64 *handle_array;
1301 int index = 0;
1302 u8 proto = 0;
1303 int ret = 0;
1304
1305 if (adapter->resetting) {
1306 if (!netif_subqueue_stopped(netdev, skb))
1307 netif_stop_subqueue(netdev, queue_num);
1308 dev_kfree_skb_any(skb);
1309
1310 tx_send_failed++;
1311 tx_dropped++;
1312 ret = NETDEV_TX_OK;
1313 goto out;
1314 }
1315
1316 tx_pool = &adapter->tx_pool[queue_num];
1317 tx_scrq = adapter->tx_scrq[queue_num];
1318 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1319 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1320 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1321
1322 index = tx_pool->free_map[tx_pool->consumer_index];
1323
1324 if (skb_is_gso(skb)) {
1325 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1326 dst = tx_pool->tso_ltb.buff + offset;
1327 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1328 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1329 tx_pool->tso_index++;
1330 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1331 tx_pool->tso_index = 0;
1332 } else {
1333 offset = index * adapter->req_mtu;
1334 dst = tx_pool->long_term_buff.buff + offset;
1335 memset(dst, 0, adapter->req_mtu);
1336 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1337 }
1338
1339 if (skb_shinfo(skb)->nr_frags) {
1340 int cur, i;
1341
1342 /* Copy the head */
1343 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1344 cur = skb_headlen(skb);
1345
1346 /* Copy the frags */
1347 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1348 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1349
1350 memcpy(dst + cur,
1351 page_address(skb_frag_page(frag)) +
1352 frag->page_offset, skb_frag_size(frag));
1353 cur += skb_frag_size(frag);
1354 }
1355 } else {
1356 skb_copy_from_linear_data(skb, dst, skb->len);
1357 }
1358
1359 tx_pool->consumer_index =
1360 (tx_pool->consumer_index + 1) %
1361 adapter->req_tx_entries_per_subcrq;
1362
1363 tx_buff = &tx_pool->tx_buff[index];
1364 tx_buff->skb = skb;
1365 tx_buff->data_dma[0] = data_dma_addr;
1366 tx_buff->data_len[0] = skb->len;
1367 tx_buff->index = index;
1368 tx_buff->pool_index = queue_num;
1369 tx_buff->last_frag = true;
1370
1371 memset(&tx_crq, 0, sizeof(tx_crq));
1372 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1373 tx_crq.v1.type = IBMVNIC_TX_DESC;
1374 tx_crq.v1.n_crq_elem = 1;
1375 tx_crq.v1.n_sge = 1;
1376 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1377 tx_crq.v1.correlator = cpu_to_be32(index);
1378 if (skb_is_gso(skb))
1379 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1380 else
1381 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1382 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1383 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1384
1385 if (adapter->vlan_header_insertion) {
1386 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1387 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1388 }
1389
1390 if (skb->protocol == htons(ETH_P_IP)) {
1391 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1392 proto = ip_hdr(skb)->protocol;
1393 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1394 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1395 proto = ipv6_hdr(skb)->nexthdr;
1396 }
1397
1398 if (proto == IPPROTO_TCP)
1399 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1400 else if (proto == IPPROTO_UDP)
1401 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1402
1403 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1404 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1405 hdrs += 2;
1406 }
1407 if (skb_is_gso(skb)) {
1408 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1409 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1410 hdrs += 2;
1411 }
1412 /* determine if l2/3/4 headers are sent to firmware */
1413 if ((*hdrs >> 7) & 1 &&
1414 (skb->protocol == htons(ETH_P_IP) ||
1415 skb->protocol == htons(ETH_P_IPV6))) {
1416 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1417 tx_crq.v1.n_crq_elem = num_entries;
1418 tx_buff->indir_arr[0] = tx_crq;
1419 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1420 sizeof(tx_buff->indir_arr),
1421 DMA_TO_DEVICE);
1422 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1423 dev_kfree_skb_any(skb);
1424 tx_buff->skb = NULL;
1425 if (!firmware_has_feature(FW_FEATURE_CMO))
1426 dev_err(dev, "tx: unable to map descriptor array\n");
1427 tx_map_failed++;
1428 tx_dropped++;
1429 ret = NETDEV_TX_OK;
1430 goto out;
1431 }
1432 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1433 (u64)tx_buff->indir_dma,
1434 (u64)num_entries);
1435 } else {
1436 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1437 &tx_crq);
1438 }
1439 if (lpar_rc != H_SUCCESS) {
1440 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1441
1442 if (tx_pool->consumer_index == 0)
1443 tx_pool->consumer_index =
1444 adapter->req_tx_entries_per_subcrq - 1;
1445 else
1446 tx_pool->consumer_index--;
1447
1448 dev_kfree_skb_any(skb);
1449 tx_buff->skb = NULL;
1450
1451 if (lpar_rc == H_CLOSED) {
1452 /* Disable TX and report carrier off if queue is closed.
1453 * Firmware guarantees that a signal will be sent to the
1454 * driver, triggering a reset or some other action.
1455 */
1456 netif_tx_stop_all_queues(netdev);
1457 netif_carrier_off(netdev);
1458 }
1459
1460 tx_send_failed++;
1461 tx_dropped++;
1462 ret = NETDEV_TX_OK;
1463 goto out;
1464 }
1465
1466 if (atomic_inc_return(&tx_scrq->used)
1467 >= adapter->req_tx_entries_per_subcrq) {
1468 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1469 netif_stop_subqueue(netdev, queue_num);
1470 }
1471
1472 tx_packets++;
1473 tx_bytes += skb->len;
1474 txq->trans_start = jiffies;
1475 ret = NETDEV_TX_OK;
1476
1477 out:
1478 netdev->stats.tx_dropped += tx_dropped;
1479 netdev->stats.tx_bytes += tx_bytes;
1480 netdev->stats.tx_packets += tx_packets;
1481 adapter->tx_send_failed += tx_send_failed;
1482 adapter->tx_map_failed += tx_map_failed;
1483 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1484 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1485 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1486
1487 return ret;
1488 }
1489
1490 static void ibmvnic_set_multi(struct net_device *netdev)
1491 {
1492 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1493 struct netdev_hw_addr *ha;
1494 union ibmvnic_crq crq;
1495
1496 memset(&crq, 0, sizeof(crq));
1497 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1498 crq.request_capability.cmd = REQUEST_CAPABILITY;
1499
1500 if (netdev->flags & IFF_PROMISC) {
1501 if (!adapter->promisc_supported)
1502 return;
1503 } else {
1504 if (netdev->flags & IFF_ALLMULTI) {
1505 /* Accept all multicast */
1506 memset(&crq, 0, sizeof(crq));
1507 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1508 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1509 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1510 ibmvnic_send_crq(adapter, &crq);
1511 } else if (netdev_mc_empty(netdev)) {
1512 /* Reject 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_DISABLE_ALL;
1517 ibmvnic_send_crq(adapter, &crq);
1518 } else {
1519 /* Accept one or more multicast(s) */
1520 netdev_for_each_mc_addr(ha, netdev) {
1521 memset(&crq, 0, sizeof(crq));
1522 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1523 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1524 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1525 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1526 ha->addr);
1527 ibmvnic_send_crq(adapter, &crq);
1528 }
1529 }
1530 }
1531 }
1532
1533 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1534 {
1535 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1536 struct sockaddr *addr = p;
1537 union ibmvnic_crq crq;
1538
1539 if (!is_valid_ether_addr(addr->sa_data))
1540 return -EADDRNOTAVAIL;
1541
1542 memset(&crq, 0, sizeof(crq));
1543 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1544 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1545 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1546 ibmvnic_send_crq(adapter, &crq);
1547 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1548 return 0;
1549 }
1550
1551 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1552 {
1553 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1554 struct sockaddr *addr = p;
1555
1556 if (adapter->state == VNIC_PROBED) {
1557 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1558 adapter->mac_change_pending = true;
1559 return 0;
1560 }
1561
1562 __ibmvnic_set_mac(netdev, addr);
1563
1564 return 0;
1565 }
1566
1567 /**
1568 * do_reset returns zero if we are able to keep processing reset events, or
1569 * non-zero if we hit a fatal error and must halt.
1570 */
1571 static int do_reset(struct ibmvnic_adapter *adapter,
1572 struct ibmvnic_rwi *rwi, u32 reset_state)
1573 {
1574 u64 old_num_rx_queues, old_num_tx_queues;
1575 struct net_device *netdev = adapter->netdev;
1576 int i, rc;
1577
1578 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1579 rwi->reset_reason);
1580
1581 netif_carrier_off(netdev);
1582 adapter->reset_reason = rwi->reset_reason;
1583
1584 old_num_rx_queues = adapter->req_rx_queues;
1585 old_num_tx_queues = adapter->req_tx_queues;
1586
1587 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1588 rc = ibmvnic_reenable_crq_queue(adapter);
1589 if (rc)
1590 return 0;
1591 }
1592
1593 rc = __ibmvnic_close(netdev);
1594 if (rc)
1595 return rc;
1596
1597 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1598 adapter->wait_for_reset) {
1599 release_resources(adapter);
1600 release_sub_crqs(adapter);
1601 release_crq_queue(adapter);
1602 }
1603
1604 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1605 /* remove the closed state so when we call open it appears
1606 * we are coming from the probed state.
1607 */
1608 adapter->state = VNIC_PROBED;
1609
1610 rc = ibmvnic_init(adapter);
1611 if (rc)
1612 return IBMVNIC_INIT_FAILED;
1613
1614 /* If the adapter was in PROBE state prior to the reset,
1615 * exit here.
1616 */
1617 if (reset_state == VNIC_PROBED)
1618 return 0;
1619
1620 rc = ibmvnic_login(netdev);
1621 if (rc) {
1622 adapter->state = VNIC_PROBED;
1623 return 0;
1624 }
1625
1626 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1627 adapter->wait_for_reset) {
1628 rc = init_resources(adapter);
1629 if (rc)
1630 return rc;
1631 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1632 adapter->req_tx_queues != old_num_tx_queues) {
1633 release_rx_pools(adapter);
1634 release_tx_pools(adapter);
1635 init_rx_pools(netdev);
1636 init_tx_pools(netdev);
1637 } else {
1638 rc = reset_tx_pools(adapter);
1639 if (rc)
1640 return rc;
1641
1642 rc = reset_rx_pools(adapter);
1643 if (rc)
1644 return rc;
1645
1646 if (reset_state == VNIC_CLOSED)
1647 return 0;
1648 }
1649 }
1650
1651 rc = __ibmvnic_open(netdev);
1652 if (rc) {
1653 if (list_empty(&adapter->rwi_list))
1654 adapter->state = VNIC_CLOSED;
1655 else
1656 adapter->state = reset_state;
1657
1658 return 0;
1659 }
1660
1661 netif_carrier_on(netdev);
1662
1663 /* kick napi */
1664 for (i = 0; i < adapter->req_rx_queues; i++)
1665 napi_schedule(&adapter->napi[i]);
1666
1667 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1668 netdev_notify_peers(netdev);
1669
1670 return 0;
1671 }
1672
1673 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1674 {
1675 struct ibmvnic_rwi *rwi;
1676
1677 mutex_lock(&adapter->rwi_lock);
1678
1679 if (!list_empty(&adapter->rwi_list)) {
1680 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1681 list);
1682 list_del(&rwi->list);
1683 } else {
1684 rwi = NULL;
1685 }
1686
1687 mutex_unlock(&adapter->rwi_lock);
1688 return rwi;
1689 }
1690
1691 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1692 {
1693 struct ibmvnic_rwi *rwi;
1694
1695 rwi = get_next_rwi(adapter);
1696 while (rwi) {
1697 kfree(rwi);
1698 rwi = get_next_rwi(adapter);
1699 }
1700 }
1701
1702 static void __ibmvnic_reset(struct work_struct *work)
1703 {
1704 struct ibmvnic_rwi *rwi;
1705 struct ibmvnic_adapter *adapter;
1706 struct net_device *netdev;
1707 u32 reset_state;
1708 int rc = 0;
1709
1710 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1711 netdev = adapter->netdev;
1712
1713 mutex_lock(&adapter->reset_lock);
1714 adapter->resetting = true;
1715 reset_state = adapter->state;
1716
1717 rwi = get_next_rwi(adapter);
1718 while (rwi) {
1719 rc = do_reset(adapter, rwi, reset_state);
1720 kfree(rwi);
1721 if (rc && rc != IBMVNIC_INIT_FAILED)
1722 break;
1723
1724 rwi = get_next_rwi(adapter);
1725 }
1726
1727 if (adapter->wait_for_reset) {
1728 adapter->wait_for_reset = false;
1729 adapter->reset_done_rc = rc;
1730 complete(&adapter->reset_done);
1731 }
1732
1733 if (rc) {
1734 netdev_dbg(adapter->netdev, "Reset failed\n");
1735 free_all_rwi(adapter);
1736 mutex_unlock(&adapter->reset_lock);
1737 return;
1738 }
1739
1740 adapter->resetting = false;
1741 mutex_unlock(&adapter->reset_lock);
1742 }
1743
1744 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1745 enum ibmvnic_reset_reason reason)
1746 {
1747 struct ibmvnic_rwi *rwi, *tmp;
1748 struct net_device *netdev = adapter->netdev;
1749 struct list_head *entry;
1750
1751 if (adapter->state == VNIC_REMOVING ||
1752 adapter->state == VNIC_REMOVED) {
1753 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1754 return;
1755 }
1756
1757 if (adapter->state == VNIC_PROBING) {
1758 netdev_warn(netdev, "Adapter reset during probe\n");
1759 adapter->init_done_rc = EAGAIN;
1760 return;
1761 }
1762
1763 mutex_lock(&adapter->rwi_lock);
1764
1765 list_for_each(entry, &adapter->rwi_list) {
1766 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1767 if (tmp->reset_reason == reason) {
1768 netdev_dbg(netdev, "Skipping matching reset\n");
1769 mutex_unlock(&adapter->rwi_lock);
1770 return;
1771 }
1772 }
1773
1774 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1775 if (!rwi) {
1776 mutex_unlock(&adapter->rwi_lock);
1777 ibmvnic_close(netdev);
1778 return;
1779 }
1780
1781 rwi->reset_reason = reason;
1782 list_add_tail(&rwi->list, &adapter->rwi_list);
1783 mutex_unlock(&adapter->rwi_lock);
1784
1785 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1786 schedule_work(&adapter->ibmvnic_reset);
1787 }
1788
1789 static void ibmvnic_tx_timeout(struct net_device *dev)
1790 {
1791 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1792
1793 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1794 }
1795
1796 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1797 struct ibmvnic_rx_buff *rx_buff)
1798 {
1799 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1800
1801 rx_buff->skb = NULL;
1802
1803 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1804 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1805
1806 atomic_dec(&pool->available);
1807 }
1808
1809 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1810 {
1811 struct net_device *netdev = napi->dev;
1812 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1813 int scrq_num = (int)(napi - adapter->napi);
1814 int frames_processed = 0;
1815
1816 restart_poll:
1817 while (frames_processed < budget) {
1818 struct sk_buff *skb;
1819 struct ibmvnic_rx_buff *rx_buff;
1820 union sub_crq *next;
1821 u32 length;
1822 u16 offset;
1823 u8 flags = 0;
1824
1825 if (unlikely(adapter->resetting)) {
1826 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1827 napi_complete_done(napi, frames_processed);
1828 return frames_processed;
1829 }
1830
1831 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1832 break;
1833 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1834 rx_buff =
1835 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1836 rx_comp.correlator);
1837 /* do error checking */
1838 if (next->rx_comp.rc) {
1839 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1840 be16_to_cpu(next->rx_comp.rc));
1841 /* free the entry */
1842 next->rx_comp.first = 0;
1843 remove_buff_from_pool(adapter, rx_buff);
1844 continue;
1845 }
1846
1847 length = be32_to_cpu(next->rx_comp.len);
1848 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1849 flags = next->rx_comp.flags;
1850 skb = rx_buff->skb;
1851 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1852 length);
1853
1854 /* VLAN Header has been stripped by the system firmware and
1855 * needs to be inserted by the driver
1856 */
1857 if (adapter->rx_vlan_header_insertion &&
1858 (flags & IBMVNIC_VLAN_STRIPPED))
1859 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1860 ntohs(next->rx_comp.vlan_tci));
1861
1862 /* free the entry */
1863 next->rx_comp.first = 0;
1864 remove_buff_from_pool(adapter, rx_buff);
1865
1866 skb_put(skb, length);
1867 skb->protocol = eth_type_trans(skb, netdev);
1868 skb_record_rx_queue(skb, scrq_num);
1869
1870 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1871 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1872 skb->ip_summed = CHECKSUM_UNNECESSARY;
1873 }
1874
1875 length = skb->len;
1876 napi_gro_receive(napi, skb); /* send it up */
1877 netdev->stats.rx_packets++;
1878 netdev->stats.rx_bytes += length;
1879 adapter->rx_stats_buffers[scrq_num].packets++;
1880 adapter->rx_stats_buffers[scrq_num].bytes += length;
1881 frames_processed++;
1882 }
1883
1884 if (adapter->state != VNIC_CLOSING)
1885 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1886
1887 if (frames_processed < budget) {
1888 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1889 napi_complete_done(napi, frames_processed);
1890 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1891 napi_reschedule(napi)) {
1892 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1893 goto restart_poll;
1894 }
1895 }
1896 return frames_processed;
1897 }
1898
1899 #ifdef CONFIG_NET_POLL_CONTROLLER
1900 static void ibmvnic_netpoll_controller(struct net_device *dev)
1901 {
1902 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1903 int i;
1904
1905 replenish_pools(netdev_priv(dev));
1906 for (i = 0; i < adapter->req_rx_queues; i++)
1907 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1908 adapter->rx_scrq[i]);
1909 }
1910 #endif
1911
1912 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1913 {
1914 adapter->fallback.mtu = adapter->req_mtu;
1915 adapter->fallback.rx_queues = adapter->req_rx_queues;
1916 adapter->fallback.tx_queues = adapter->req_tx_queues;
1917 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1918 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1919
1920 init_completion(&adapter->reset_done);
1921 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1922 adapter->wait_for_reset = true;
1923 wait_for_completion(&adapter->reset_done);
1924
1925 if (adapter->reset_done_rc) {
1926 adapter->desired.mtu = adapter->fallback.mtu;
1927 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1928 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1929 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1930 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1931
1932 init_completion(&adapter->reset_done);
1933 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1934 wait_for_completion(&adapter->reset_done);
1935 }
1936 adapter->wait_for_reset = false;
1937
1938 return adapter->reset_done_rc;
1939 }
1940
1941 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1942 {
1943 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1944
1945 adapter->desired.mtu = new_mtu + ETH_HLEN;
1946
1947 return wait_for_reset(adapter);
1948 }
1949
1950 static const struct net_device_ops ibmvnic_netdev_ops = {
1951 .ndo_open = ibmvnic_open,
1952 .ndo_stop = ibmvnic_close,
1953 .ndo_start_xmit = ibmvnic_xmit,
1954 .ndo_set_rx_mode = ibmvnic_set_multi,
1955 .ndo_set_mac_address = ibmvnic_set_mac,
1956 .ndo_validate_addr = eth_validate_addr,
1957 .ndo_tx_timeout = ibmvnic_tx_timeout,
1958 #ifdef CONFIG_NET_POLL_CONTROLLER
1959 .ndo_poll_controller = ibmvnic_netpoll_controller,
1960 #endif
1961 .ndo_change_mtu = ibmvnic_change_mtu,
1962 };
1963
1964 /* ethtool functions */
1965
1966 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1967 struct ethtool_link_ksettings *cmd)
1968 {
1969 u32 supported, advertising;
1970
1971 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1972 SUPPORTED_FIBRE);
1973 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1974 ADVERTISED_FIBRE);
1975 cmd->base.speed = SPEED_1000;
1976 cmd->base.duplex = DUPLEX_FULL;
1977 cmd->base.port = PORT_FIBRE;
1978 cmd->base.phy_address = 0;
1979 cmd->base.autoneg = AUTONEG_ENABLE;
1980
1981 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1982 supported);
1983 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1984 advertising);
1985
1986 return 0;
1987 }
1988
1989 static void ibmvnic_get_drvinfo(struct net_device *netdev,
1990 struct ethtool_drvinfo *info)
1991 {
1992 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1993
1994 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1995 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1996 strlcpy(info->fw_version, adapter->fw_version,
1997 sizeof(info->fw_version));
1998 }
1999
2000 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2001 {
2002 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2003
2004 return adapter->msg_enable;
2005 }
2006
2007 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2008 {
2009 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2010
2011 adapter->msg_enable = data;
2012 }
2013
2014 static u32 ibmvnic_get_link(struct net_device *netdev)
2015 {
2016 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2017
2018 /* Don't need to send a query because we request a logical link up at
2019 * init and then we wait for link state indications
2020 */
2021 return adapter->logical_link_state;
2022 }
2023
2024 static void ibmvnic_get_ringparam(struct net_device *netdev,
2025 struct ethtool_ringparam *ring)
2026 {
2027 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2028
2029 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2030 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2031 ring->rx_mini_max_pending = 0;
2032 ring->rx_jumbo_max_pending = 0;
2033 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2034 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2035 ring->rx_mini_pending = 0;
2036 ring->rx_jumbo_pending = 0;
2037 }
2038
2039 static int ibmvnic_set_ringparam(struct net_device *netdev,
2040 struct ethtool_ringparam *ring)
2041 {
2042 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2043
2044 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2045 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2046 netdev_err(netdev, "Invalid request.\n");
2047 netdev_err(netdev, "Max tx buffers = %llu\n",
2048 adapter->max_rx_add_entries_per_subcrq);
2049 netdev_err(netdev, "Max rx buffers = %llu\n",
2050 adapter->max_tx_entries_per_subcrq);
2051 return -EINVAL;
2052 }
2053
2054 adapter->desired.rx_entries = ring->rx_pending;
2055 adapter->desired.tx_entries = ring->tx_pending;
2056
2057 return wait_for_reset(adapter);
2058 }
2059
2060 static void ibmvnic_get_channels(struct net_device *netdev,
2061 struct ethtool_channels *channels)
2062 {
2063 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2064
2065 channels->max_rx = adapter->max_rx_queues;
2066 channels->max_tx = adapter->max_tx_queues;
2067 channels->max_other = 0;
2068 channels->max_combined = 0;
2069 channels->rx_count = adapter->req_rx_queues;
2070 channels->tx_count = adapter->req_tx_queues;
2071 channels->other_count = 0;
2072 channels->combined_count = 0;
2073 }
2074
2075 static int ibmvnic_set_channels(struct net_device *netdev,
2076 struct ethtool_channels *channels)
2077 {
2078 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2079
2080 adapter->desired.rx_queues = channels->rx_count;
2081 adapter->desired.tx_queues = channels->tx_count;
2082
2083 return wait_for_reset(adapter);
2084 }
2085
2086 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2087 {
2088 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2089 int i;
2090
2091 if (stringset != ETH_SS_STATS)
2092 return;
2093
2094 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2095 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2096
2097 for (i = 0; i < adapter->req_tx_queues; i++) {
2098 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2099 data += ETH_GSTRING_LEN;
2100
2101 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2102 data += ETH_GSTRING_LEN;
2103
2104 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2105 data += ETH_GSTRING_LEN;
2106 }
2107
2108 for (i = 0; i < adapter->req_rx_queues; i++) {
2109 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2110 data += ETH_GSTRING_LEN;
2111
2112 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2113 data += ETH_GSTRING_LEN;
2114
2115 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2116 data += ETH_GSTRING_LEN;
2117 }
2118 }
2119
2120 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2121 {
2122 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2123
2124 switch (sset) {
2125 case ETH_SS_STATS:
2126 return ARRAY_SIZE(ibmvnic_stats) +
2127 adapter->req_tx_queues * NUM_TX_STATS +
2128 adapter->req_rx_queues * NUM_RX_STATS;
2129 default:
2130 return -EOPNOTSUPP;
2131 }
2132 }
2133
2134 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2135 struct ethtool_stats *stats, u64 *data)
2136 {
2137 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2138 union ibmvnic_crq crq;
2139 int i, j;
2140
2141 memset(&crq, 0, sizeof(crq));
2142 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2143 crq.request_statistics.cmd = REQUEST_STATISTICS;
2144 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2145 crq.request_statistics.len =
2146 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2147
2148 /* Wait for data to be written */
2149 init_completion(&adapter->stats_done);
2150 ibmvnic_send_crq(adapter, &crq);
2151 wait_for_completion(&adapter->stats_done);
2152
2153 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2154 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2155 ibmvnic_stats[i].offset));
2156
2157 for (j = 0; j < adapter->req_tx_queues; j++) {
2158 data[i] = adapter->tx_stats_buffers[j].packets;
2159 i++;
2160 data[i] = adapter->tx_stats_buffers[j].bytes;
2161 i++;
2162 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2163 i++;
2164 }
2165
2166 for (j = 0; j < adapter->req_rx_queues; j++) {
2167 data[i] = adapter->rx_stats_buffers[j].packets;
2168 i++;
2169 data[i] = adapter->rx_stats_buffers[j].bytes;
2170 i++;
2171 data[i] = adapter->rx_stats_buffers[j].interrupts;
2172 i++;
2173 }
2174 }
2175
2176 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2177 .get_drvinfo = ibmvnic_get_drvinfo,
2178 .get_msglevel = ibmvnic_get_msglevel,
2179 .set_msglevel = ibmvnic_set_msglevel,
2180 .get_link = ibmvnic_get_link,
2181 .get_ringparam = ibmvnic_get_ringparam,
2182 .set_ringparam = ibmvnic_set_ringparam,
2183 .get_channels = ibmvnic_get_channels,
2184 .set_channels = ibmvnic_set_channels,
2185 .get_strings = ibmvnic_get_strings,
2186 .get_sset_count = ibmvnic_get_sset_count,
2187 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2188 .get_link_ksettings = ibmvnic_get_link_ksettings,
2189 };
2190
2191 /* Routines for managing CRQs/sCRQs */
2192
2193 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2194 struct ibmvnic_sub_crq_queue *scrq)
2195 {
2196 int rc;
2197
2198 if (scrq->irq) {
2199 free_irq(scrq->irq, scrq);
2200 irq_dispose_mapping(scrq->irq);
2201 scrq->irq = 0;
2202 }
2203
2204 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2205 scrq->cur = 0;
2206
2207 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2208 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2209 return rc;
2210 }
2211
2212 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2213 {
2214 int i, rc;
2215
2216 for (i = 0; i < adapter->req_tx_queues; i++) {
2217 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2218 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2219 if (rc)
2220 return rc;
2221 }
2222
2223 for (i = 0; i < adapter->req_rx_queues; i++) {
2224 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2225 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2226 if (rc)
2227 return rc;
2228 }
2229
2230 return rc;
2231 }
2232
2233 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2234 struct ibmvnic_sub_crq_queue *scrq)
2235 {
2236 struct device *dev = &adapter->vdev->dev;
2237 long rc;
2238
2239 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2240
2241 /* Close the sub-crqs */
2242 do {
2243 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2244 adapter->vdev->unit_address,
2245 scrq->crq_num);
2246 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2247
2248 if (rc) {
2249 netdev_err(adapter->netdev,
2250 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2251 scrq->crq_num, rc);
2252 }
2253
2254 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2255 DMA_BIDIRECTIONAL);
2256 free_pages((unsigned long)scrq->msgs, 2);
2257 kfree(scrq);
2258 }
2259
2260 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2261 *adapter)
2262 {
2263 struct device *dev = &adapter->vdev->dev;
2264 struct ibmvnic_sub_crq_queue *scrq;
2265 int rc;
2266
2267 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2268 if (!scrq)
2269 return NULL;
2270
2271 scrq->msgs =
2272 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2273 if (!scrq->msgs) {
2274 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2275 goto zero_page_failed;
2276 }
2277
2278 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2279 DMA_BIDIRECTIONAL);
2280 if (dma_mapping_error(dev, scrq->msg_token)) {
2281 dev_warn(dev, "Couldn't map crq queue messages page\n");
2282 goto map_failed;
2283 }
2284
2285 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2286 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2287
2288 if (rc == H_RESOURCE)
2289 rc = ibmvnic_reset_crq(adapter);
2290
2291 if (rc == H_CLOSED) {
2292 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2293 } else if (rc) {
2294 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2295 goto reg_failed;
2296 }
2297
2298 scrq->adapter = adapter;
2299 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2300 spin_lock_init(&scrq->lock);
2301
2302 netdev_dbg(adapter->netdev,
2303 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2304 scrq->crq_num, scrq->hw_irq, scrq->irq);
2305
2306 return scrq;
2307
2308 reg_failed:
2309 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2310 DMA_BIDIRECTIONAL);
2311 map_failed:
2312 free_pages((unsigned long)scrq->msgs, 2);
2313 zero_page_failed:
2314 kfree(scrq);
2315
2316 return NULL;
2317 }
2318
2319 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2320 {
2321 int i;
2322
2323 if (adapter->tx_scrq) {
2324 for (i = 0; i < adapter->req_tx_queues; i++) {
2325 if (!adapter->tx_scrq[i])
2326 continue;
2327
2328 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2329 i);
2330 if (adapter->tx_scrq[i]->irq) {
2331 free_irq(adapter->tx_scrq[i]->irq,
2332 adapter->tx_scrq[i]);
2333 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2334 adapter->tx_scrq[i]->irq = 0;
2335 }
2336
2337 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2338 }
2339
2340 kfree(adapter->tx_scrq);
2341 adapter->tx_scrq = NULL;
2342 }
2343
2344 if (adapter->rx_scrq) {
2345 for (i = 0; i < adapter->req_rx_queues; i++) {
2346 if (!adapter->rx_scrq[i])
2347 continue;
2348
2349 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2350 i);
2351 if (adapter->rx_scrq[i]->irq) {
2352 free_irq(adapter->rx_scrq[i]->irq,
2353 adapter->rx_scrq[i]);
2354 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2355 adapter->rx_scrq[i]->irq = 0;
2356 }
2357
2358 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2359 }
2360
2361 kfree(adapter->rx_scrq);
2362 adapter->rx_scrq = NULL;
2363 }
2364 }
2365
2366 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2367 struct ibmvnic_sub_crq_queue *scrq)
2368 {
2369 struct device *dev = &adapter->vdev->dev;
2370 unsigned long rc;
2371
2372 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2373 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2374 if (rc)
2375 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2376 scrq->hw_irq, rc);
2377 return rc;
2378 }
2379
2380 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2381 struct ibmvnic_sub_crq_queue *scrq)
2382 {
2383 struct device *dev = &adapter->vdev->dev;
2384 unsigned long rc;
2385
2386 if (scrq->hw_irq > 0x100000000ULL) {
2387 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2388 return 1;
2389 }
2390
2391 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2392 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2393 if (rc)
2394 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2395 scrq->hw_irq, rc);
2396 return rc;
2397 }
2398
2399 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2400 struct ibmvnic_sub_crq_queue *scrq)
2401 {
2402 struct device *dev = &adapter->vdev->dev;
2403 struct ibmvnic_tx_buff *txbuff;
2404 union sub_crq *next;
2405 int index;
2406 int i, j;
2407 u8 first;
2408
2409 restart_loop:
2410 while (pending_scrq(adapter, scrq)) {
2411 unsigned int pool = scrq->pool_index;
2412
2413 next = ibmvnic_next_scrq(adapter, scrq);
2414 for (i = 0; i < next->tx_comp.num_comps; i++) {
2415 if (next->tx_comp.rcs[i]) {
2416 dev_err(dev, "tx error %x\n",
2417 next->tx_comp.rcs[i]);
2418 continue;
2419 }
2420 index = be32_to_cpu(next->tx_comp.correlators[i]);
2421 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2422
2423 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2424 if (!txbuff->data_dma[j])
2425 continue;
2426
2427 txbuff->data_dma[j] = 0;
2428 }
2429 /* if sub_crq was sent indirectly */
2430 first = txbuff->indir_arr[0].generic.first;
2431 if (first == IBMVNIC_CRQ_CMD) {
2432 dma_unmap_single(dev, txbuff->indir_dma,
2433 sizeof(txbuff->indir_arr),
2434 DMA_TO_DEVICE);
2435 }
2436
2437 if (txbuff->last_frag) {
2438 dev_kfree_skb_any(txbuff->skb);
2439 txbuff->skb = NULL;
2440 }
2441
2442 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2443 producer_index] = index;
2444 adapter->tx_pool[pool].producer_index =
2445 (adapter->tx_pool[pool].producer_index + 1) %
2446 adapter->req_tx_entries_per_subcrq;
2447 }
2448 /* remove tx_comp scrq*/
2449 next->tx_comp.first = 0;
2450
2451 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2452 (adapter->req_tx_entries_per_subcrq / 2) &&
2453 __netif_subqueue_stopped(adapter->netdev,
2454 scrq->pool_index)) {
2455 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2456 netdev_info(adapter->netdev, "Started queue %d\n",
2457 scrq->pool_index);
2458 }
2459 }
2460
2461 enable_scrq_irq(adapter, scrq);
2462
2463 if (pending_scrq(adapter, scrq)) {
2464 disable_scrq_irq(adapter, scrq);
2465 goto restart_loop;
2466 }
2467
2468 return 0;
2469 }
2470
2471 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2472 {
2473 struct ibmvnic_sub_crq_queue *scrq = instance;
2474 struct ibmvnic_adapter *adapter = scrq->adapter;
2475
2476 disable_scrq_irq(adapter, scrq);
2477 ibmvnic_complete_tx(adapter, scrq);
2478
2479 return IRQ_HANDLED;
2480 }
2481
2482 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2483 {
2484 struct ibmvnic_sub_crq_queue *scrq = instance;
2485 struct ibmvnic_adapter *adapter = scrq->adapter;
2486
2487 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2488
2489 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2490 disable_scrq_irq(adapter, scrq);
2491 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2492 }
2493
2494 return IRQ_HANDLED;
2495 }
2496
2497 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2498 {
2499 struct device *dev = &adapter->vdev->dev;
2500 struct ibmvnic_sub_crq_queue *scrq;
2501 int i = 0, j = 0;
2502 int rc = 0;
2503
2504 for (i = 0; i < adapter->req_tx_queues; i++) {
2505 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2506 i);
2507 scrq = adapter->tx_scrq[i];
2508 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2509
2510 if (!scrq->irq) {
2511 rc = -EINVAL;
2512 dev_err(dev, "Error mapping irq\n");
2513 goto req_tx_irq_failed;
2514 }
2515
2516 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2517 0, "ibmvnic_tx", scrq);
2518
2519 if (rc) {
2520 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2521 scrq->irq, rc);
2522 irq_dispose_mapping(scrq->irq);
2523 goto req_rx_irq_failed;
2524 }
2525 }
2526
2527 for (i = 0; i < adapter->req_rx_queues; i++) {
2528 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2529 i);
2530 scrq = adapter->rx_scrq[i];
2531 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2532 if (!scrq->irq) {
2533 rc = -EINVAL;
2534 dev_err(dev, "Error mapping irq\n");
2535 goto req_rx_irq_failed;
2536 }
2537 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2538 0, "ibmvnic_rx", scrq);
2539 if (rc) {
2540 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2541 scrq->irq, rc);
2542 irq_dispose_mapping(scrq->irq);
2543 goto req_rx_irq_failed;
2544 }
2545 }
2546 return rc;
2547
2548 req_rx_irq_failed:
2549 for (j = 0; j < i; j++) {
2550 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2551 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2552 }
2553 i = adapter->req_tx_queues;
2554 req_tx_irq_failed:
2555 for (j = 0; j < i; j++) {
2556 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2557 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2558 }
2559 release_sub_crqs(adapter);
2560 return rc;
2561 }
2562
2563 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2564 {
2565 struct device *dev = &adapter->vdev->dev;
2566 struct ibmvnic_sub_crq_queue **allqueues;
2567 int registered_queues = 0;
2568 int total_queues;
2569 int more = 0;
2570 int i;
2571
2572 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2573
2574 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2575 if (!allqueues)
2576 return -1;
2577
2578 for (i = 0; i < total_queues; i++) {
2579 allqueues[i] = init_sub_crq_queue(adapter);
2580 if (!allqueues[i]) {
2581 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2582 break;
2583 }
2584 registered_queues++;
2585 }
2586
2587 /* Make sure we were able to register the minimum number of queues */
2588 if (registered_queues <
2589 adapter->min_tx_queues + adapter->min_rx_queues) {
2590 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2591 goto tx_failed;
2592 }
2593
2594 /* Distribute the failed allocated queues*/
2595 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2596 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2597 switch (i % 3) {
2598 case 0:
2599 if (adapter->req_rx_queues > adapter->min_rx_queues)
2600 adapter->req_rx_queues--;
2601 else
2602 more++;
2603 break;
2604 case 1:
2605 if (adapter->req_tx_queues > adapter->min_tx_queues)
2606 adapter->req_tx_queues--;
2607 else
2608 more++;
2609 break;
2610 }
2611 }
2612
2613 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2614 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2615 if (!adapter->tx_scrq)
2616 goto tx_failed;
2617
2618 for (i = 0; i < adapter->req_tx_queues; i++) {
2619 adapter->tx_scrq[i] = allqueues[i];
2620 adapter->tx_scrq[i]->pool_index = i;
2621 }
2622
2623 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2624 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2625 if (!adapter->rx_scrq)
2626 goto rx_failed;
2627
2628 for (i = 0; i < adapter->req_rx_queues; i++) {
2629 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2630 adapter->rx_scrq[i]->scrq_num = i;
2631 }
2632
2633 kfree(allqueues);
2634 return 0;
2635
2636 rx_failed:
2637 kfree(adapter->tx_scrq);
2638 adapter->tx_scrq = NULL;
2639 tx_failed:
2640 for (i = 0; i < registered_queues; i++)
2641 release_sub_crq_queue(adapter, allqueues[i]);
2642 kfree(allqueues);
2643 return -1;
2644 }
2645
2646 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2647 {
2648 struct device *dev = &adapter->vdev->dev;
2649 union ibmvnic_crq crq;
2650 int max_entries;
2651
2652 if (!retry) {
2653 /* Sub-CRQ entries are 32 byte long */
2654 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2655
2656 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2657 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2658 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2659 return;
2660 }
2661
2662 if (adapter->desired.mtu)
2663 adapter->req_mtu = adapter->desired.mtu;
2664 else
2665 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2666
2667 if (!adapter->desired.tx_entries)
2668 adapter->desired.tx_entries =
2669 adapter->max_tx_entries_per_subcrq;
2670 if (!adapter->desired.rx_entries)
2671 adapter->desired.rx_entries =
2672 adapter->max_rx_add_entries_per_subcrq;
2673
2674 max_entries = IBMVNIC_MAX_LTB_SIZE /
2675 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2676
2677 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2678 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2679 adapter->desired.tx_entries = max_entries;
2680 }
2681
2682 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2683 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2684 adapter->desired.rx_entries = max_entries;
2685 }
2686
2687 if (adapter->desired.tx_entries)
2688 adapter->req_tx_entries_per_subcrq =
2689 adapter->desired.tx_entries;
2690 else
2691 adapter->req_tx_entries_per_subcrq =
2692 adapter->max_tx_entries_per_subcrq;
2693
2694 if (adapter->desired.rx_entries)
2695 adapter->req_rx_add_entries_per_subcrq =
2696 adapter->desired.rx_entries;
2697 else
2698 adapter->req_rx_add_entries_per_subcrq =
2699 adapter->max_rx_add_entries_per_subcrq;
2700
2701 if (adapter->desired.tx_queues)
2702 adapter->req_tx_queues =
2703 adapter->desired.tx_queues;
2704 else
2705 adapter->req_tx_queues =
2706 adapter->opt_tx_comp_sub_queues;
2707
2708 if (adapter->desired.rx_queues)
2709 adapter->req_rx_queues =
2710 adapter->desired.rx_queues;
2711 else
2712 adapter->req_rx_queues =
2713 adapter->opt_rx_comp_queues;
2714
2715 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2716 }
2717
2718 memset(&crq, 0, sizeof(crq));
2719 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2720 crq.request_capability.cmd = REQUEST_CAPABILITY;
2721
2722 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2723 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2724 atomic_inc(&adapter->running_cap_crqs);
2725 ibmvnic_send_crq(adapter, &crq);
2726
2727 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2728 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2729 atomic_inc(&adapter->running_cap_crqs);
2730 ibmvnic_send_crq(adapter, &crq);
2731
2732 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2733 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2734 atomic_inc(&adapter->running_cap_crqs);
2735 ibmvnic_send_crq(adapter, &crq);
2736
2737 crq.request_capability.capability =
2738 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2739 crq.request_capability.number =
2740 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2741 atomic_inc(&adapter->running_cap_crqs);
2742 ibmvnic_send_crq(adapter, &crq);
2743
2744 crq.request_capability.capability =
2745 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2746 crq.request_capability.number =
2747 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2748 atomic_inc(&adapter->running_cap_crqs);
2749 ibmvnic_send_crq(adapter, &crq);
2750
2751 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2752 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2753 atomic_inc(&adapter->running_cap_crqs);
2754 ibmvnic_send_crq(adapter, &crq);
2755
2756 if (adapter->netdev->flags & IFF_PROMISC) {
2757 if (adapter->promisc_supported) {
2758 crq.request_capability.capability =
2759 cpu_to_be16(PROMISC_REQUESTED);
2760 crq.request_capability.number = cpu_to_be64(1);
2761 atomic_inc(&adapter->running_cap_crqs);
2762 ibmvnic_send_crq(adapter, &crq);
2763 }
2764 } else {
2765 crq.request_capability.capability =
2766 cpu_to_be16(PROMISC_REQUESTED);
2767 crq.request_capability.number = cpu_to_be64(0);
2768 atomic_inc(&adapter->running_cap_crqs);
2769 ibmvnic_send_crq(adapter, &crq);
2770 }
2771 }
2772
2773 static int pending_scrq(struct ibmvnic_adapter *adapter,
2774 struct ibmvnic_sub_crq_queue *scrq)
2775 {
2776 union sub_crq *entry = &scrq->msgs[scrq->cur];
2777
2778 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2779 return 1;
2780 else
2781 return 0;
2782 }
2783
2784 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2785 struct ibmvnic_sub_crq_queue *scrq)
2786 {
2787 union sub_crq *entry;
2788 unsigned long flags;
2789
2790 spin_lock_irqsave(&scrq->lock, flags);
2791 entry = &scrq->msgs[scrq->cur];
2792 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2793 if (++scrq->cur == scrq->size)
2794 scrq->cur = 0;
2795 } else {
2796 entry = NULL;
2797 }
2798 spin_unlock_irqrestore(&scrq->lock, flags);
2799
2800 return entry;
2801 }
2802
2803 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2804 {
2805 struct ibmvnic_crq_queue *queue = &adapter->crq;
2806 union ibmvnic_crq *crq;
2807
2808 crq = &queue->msgs[queue->cur];
2809 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2810 if (++queue->cur == queue->size)
2811 queue->cur = 0;
2812 } else {
2813 crq = NULL;
2814 }
2815
2816 return crq;
2817 }
2818
2819 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2820 union sub_crq *sub_crq)
2821 {
2822 unsigned int ua = adapter->vdev->unit_address;
2823 struct device *dev = &adapter->vdev->dev;
2824 u64 *u64_crq = (u64 *)sub_crq;
2825 int rc;
2826
2827 netdev_dbg(adapter->netdev,
2828 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2829 (unsigned long int)cpu_to_be64(remote_handle),
2830 (unsigned long int)cpu_to_be64(u64_crq[0]),
2831 (unsigned long int)cpu_to_be64(u64_crq[1]),
2832 (unsigned long int)cpu_to_be64(u64_crq[2]),
2833 (unsigned long int)cpu_to_be64(u64_crq[3]));
2834
2835 /* Make sure the hypervisor sees the complete request */
2836 mb();
2837
2838 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2839 cpu_to_be64(remote_handle),
2840 cpu_to_be64(u64_crq[0]),
2841 cpu_to_be64(u64_crq[1]),
2842 cpu_to_be64(u64_crq[2]),
2843 cpu_to_be64(u64_crq[3]));
2844
2845 if (rc) {
2846 if (rc == H_CLOSED)
2847 dev_warn(dev, "CRQ Queue closed\n");
2848 dev_err(dev, "Send error (rc=%d)\n", rc);
2849 }
2850
2851 return rc;
2852 }
2853
2854 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2855 u64 remote_handle, u64 ioba, u64 num_entries)
2856 {
2857 unsigned int ua = adapter->vdev->unit_address;
2858 struct device *dev = &adapter->vdev->dev;
2859 int rc;
2860
2861 /* Make sure the hypervisor sees the complete request */
2862 mb();
2863 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2864 cpu_to_be64(remote_handle),
2865 ioba, num_entries);
2866
2867 if (rc) {
2868 if (rc == H_CLOSED)
2869 dev_warn(dev, "CRQ Queue closed\n");
2870 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2871 }
2872
2873 return rc;
2874 }
2875
2876 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2877 union ibmvnic_crq *crq)
2878 {
2879 unsigned int ua = adapter->vdev->unit_address;
2880 struct device *dev = &adapter->vdev->dev;
2881 u64 *u64_crq = (u64 *)crq;
2882 int rc;
2883
2884 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2885 (unsigned long int)cpu_to_be64(u64_crq[0]),
2886 (unsigned long int)cpu_to_be64(u64_crq[1]));
2887
2888 /* Make sure the hypervisor sees the complete request */
2889 mb();
2890
2891 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2892 cpu_to_be64(u64_crq[0]),
2893 cpu_to_be64(u64_crq[1]));
2894
2895 if (rc) {
2896 if (rc == H_CLOSED)
2897 dev_warn(dev, "CRQ Queue closed\n");
2898 dev_warn(dev, "Send error (rc=%d)\n", rc);
2899 }
2900
2901 return rc;
2902 }
2903
2904 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2905 {
2906 union ibmvnic_crq crq;
2907
2908 memset(&crq, 0, sizeof(crq));
2909 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2910 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2911 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2912
2913 return ibmvnic_send_crq(adapter, &crq);
2914 }
2915
2916 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2917 {
2918 union ibmvnic_crq crq;
2919
2920 memset(&crq, 0, sizeof(crq));
2921 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2922 crq.version_exchange.cmd = VERSION_EXCHANGE;
2923 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2924
2925 return ibmvnic_send_crq(adapter, &crq);
2926 }
2927
2928 struct vnic_login_client_data {
2929 u8 type;
2930 __be16 len;
2931 char name;
2932 } __packed;
2933
2934 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2935 {
2936 int len;
2937
2938 /* Calculate the amount of buffer space needed for the
2939 * vnic client data in the login buffer. There are four entries,
2940 * OS name, LPAR name, device name, and a null last entry.
2941 */
2942 len = 4 * sizeof(struct vnic_login_client_data);
2943 len += 6; /* "Linux" plus NULL */
2944 len += strlen(utsname()->nodename) + 1;
2945 len += strlen(adapter->netdev->name) + 1;
2946
2947 return len;
2948 }
2949
2950 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2951 struct vnic_login_client_data *vlcd)
2952 {
2953 const char *os_name = "Linux";
2954 int len;
2955
2956 /* Type 1 - LPAR OS */
2957 vlcd->type = 1;
2958 len = strlen(os_name) + 1;
2959 vlcd->len = cpu_to_be16(len);
2960 strncpy(&vlcd->name, os_name, len);
2961 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2962
2963 /* Type 2 - LPAR name */
2964 vlcd->type = 2;
2965 len = strlen(utsname()->nodename) + 1;
2966 vlcd->len = cpu_to_be16(len);
2967 strncpy(&vlcd->name, utsname()->nodename, len);
2968 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2969
2970 /* Type 3 - device name */
2971 vlcd->type = 3;
2972 len = strlen(adapter->netdev->name) + 1;
2973 vlcd->len = cpu_to_be16(len);
2974 strncpy(&vlcd->name, adapter->netdev->name, len);
2975 }
2976
2977 static void send_login(struct ibmvnic_adapter *adapter)
2978 {
2979 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2980 struct ibmvnic_login_buffer *login_buffer;
2981 struct device *dev = &adapter->vdev->dev;
2982 dma_addr_t rsp_buffer_token;
2983 dma_addr_t buffer_token;
2984 size_t rsp_buffer_size;
2985 union ibmvnic_crq crq;
2986 size_t buffer_size;
2987 __be64 *tx_list_p;
2988 __be64 *rx_list_p;
2989 int client_data_len;
2990 struct vnic_login_client_data *vlcd;
2991 int i;
2992
2993 client_data_len = vnic_client_data_len(adapter);
2994
2995 buffer_size =
2996 sizeof(struct ibmvnic_login_buffer) +
2997 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
2998 client_data_len;
2999
3000 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3001 if (!login_buffer)
3002 goto buf_alloc_failed;
3003
3004 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3005 DMA_TO_DEVICE);
3006 if (dma_mapping_error(dev, buffer_token)) {
3007 dev_err(dev, "Couldn't map login buffer\n");
3008 goto buf_map_failed;
3009 }
3010
3011 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3012 sizeof(u64) * adapter->req_tx_queues +
3013 sizeof(u64) * adapter->req_rx_queues +
3014 sizeof(u64) * adapter->req_rx_queues +
3015 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3016
3017 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3018 if (!login_rsp_buffer)
3019 goto buf_rsp_alloc_failed;
3020
3021 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3022 rsp_buffer_size, DMA_FROM_DEVICE);
3023 if (dma_mapping_error(dev, rsp_buffer_token)) {
3024 dev_err(dev, "Couldn't map login rsp buffer\n");
3025 goto buf_rsp_map_failed;
3026 }
3027
3028 adapter->login_buf = login_buffer;
3029 adapter->login_buf_token = buffer_token;
3030 adapter->login_buf_sz = buffer_size;
3031 adapter->login_rsp_buf = login_rsp_buffer;
3032 adapter->login_rsp_buf_token = rsp_buffer_token;
3033 adapter->login_rsp_buf_sz = rsp_buffer_size;
3034
3035 login_buffer->len = cpu_to_be32(buffer_size);
3036 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3037 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3038 login_buffer->off_txcomp_subcrqs =
3039 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3040 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3041 login_buffer->off_rxcomp_subcrqs =
3042 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3043 sizeof(u64) * adapter->req_tx_queues);
3044 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3045 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3046
3047 tx_list_p = (__be64 *)((char *)login_buffer +
3048 sizeof(struct ibmvnic_login_buffer));
3049 rx_list_p = (__be64 *)((char *)login_buffer +
3050 sizeof(struct ibmvnic_login_buffer) +
3051 sizeof(u64) * adapter->req_tx_queues);
3052
3053 for (i = 0; i < adapter->req_tx_queues; i++) {
3054 if (adapter->tx_scrq[i]) {
3055 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3056 crq_num);
3057 }
3058 }
3059
3060 for (i = 0; i < adapter->req_rx_queues; i++) {
3061 if (adapter->rx_scrq[i]) {
3062 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3063 crq_num);
3064 }
3065 }
3066
3067 /* Insert vNIC login client data */
3068 vlcd = (struct vnic_login_client_data *)
3069 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3070 login_buffer->client_data_offset =
3071 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3072 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3073
3074 vnic_add_client_data(adapter, vlcd);
3075
3076 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3077 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3078 netdev_dbg(adapter->netdev, "%016lx\n",
3079 ((unsigned long int *)(adapter->login_buf))[i]);
3080 }
3081
3082 memset(&crq, 0, sizeof(crq));
3083 crq.login.first = IBMVNIC_CRQ_CMD;
3084 crq.login.cmd = LOGIN;
3085 crq.login.ioba = cpu_to_be32(buffer_token);
3086 crq.login.len = cpu_to_be32(buffer_size);
3087 ibmvnic_send_crq(adapter, &crq);
3088
3089 return;
3090
3091 buf_rsp_map_failed:
3092 kfree(login_rsp_buffer);
3093 buf_rsp_alloc_failed:
3094 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3095 buf_map_failed:
3096 kfree(login_buffer);
3097 buf_alloc_failed:
3098 return;
3099 }
3100
3101 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3102 u32 len, u8 map_id)
3103 {
3104 union ibmvnic_crq crq;
3105
3106 memset(&crq, 0, sizeof(crq));
3107 crq.request_map.first = IBMVNIC_CRQ_CMD;
3108 crq.request_map.cmd = REQUEST_MAP;
3109 crq.request_map.map_id = map_id;
3110 crq.request_map.ioba = cpu_to_be32(addr);
3111 crq.request_map.len = cpu_to_be32(len);
3112 ibmvnic_send_crq(adapter, &crq);
3113 }
3114
3115 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3116 {
3117 union ibmvnic_crq crq;
3118
3119 memset(&crq, 0, sizeof(crq));
3120 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3121 crq.request_unmap.cmd = REQUEST_UNMAP;
3122 crq.request_unmap.map_id = map_id;
3123 ibmvnic_send_crq(adapter, &crq);
3124 }
3125
3126 static void send_map_query(struct ibmvnic_adapter *adapter)
3127 {
3128 union ibmvnic_crq crq;
3129
3130 memset(&crq, 0, sizeof(crq));
3131 crq.query_map.first = IBMVNIC_CRQ_CMD;
3132 crq.query_map.cmd = QUERY_MAP;
3133 ibmvnic_send_crq(adapter, &crq);
3134 }
3135
3136 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3137 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3138 {
3139 union ibmvnic_crq crq;
3140
3141 atomic_set(&adapter->running_cap_crqs, 0);
3142 memset(&crq, 0, sizeof(crq));
3143 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3144 crq.query_capability.cmd = QUERY_CAPABILITY;
3145
3146 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3147 atomic_inc(&adapter->running_cap_crqs);
3148 ibmvnic_send_crq(adapter, &crq);
3149
3150 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3151 atomic_inc(&adapter->running_cap_crqs);
3152 ibmvnic_send_crq(adapter, &crq);
3153
3154 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3155 atomic_inc(&adapter->running_cap_crqs);
3156 ibmvnic_send_crq(adapter, &crq);
3157
3158 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3159 atomic_inc(&adapter->running_cap_crqs);
3160 ibmvnic_send_crq(adapter, &crq);
3161
3162 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3163 atomic_inc(&adapter->running_cap_crqs);
3164 ibmvnic_send_crq(adapter, &crq);
3165
3166 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3167 atomic_inc(&adapter->running_cap_crqs);
3168 ibmvnic_send_crq(adapter, &crq);
3169
3170 crq.query_capability.capability =
3171 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3172 atomic_inc(&adapter->running_cap_crqs);
3173 ibmvnic_send_crq(adapter, &crq);
3174
3175 crq.query_capability.capability =
3176 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3177 atomic_inc(&adapter->running_cap_crqs);
3178 ibmvnic_send_crq(adapter, &crq);
3179
3180 crq.query_capability.capability =
3181 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3182 atomic_inc(&adapter->running_cap_crqs);
3183 ibmvnic_send_crq(adapter, &crq);
3184
3185 crq.query_capability.capability =
3186 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3187 atomic_inc(&adapter->running_cap_crqs);
3188 ibmvnic_send_crq(adapter, &crq);
3189
3190 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3191 atomic_inc(&adapter->running_cap_crqs);
3192 ibmvnic_send_crq(adapter, &crq);
3193
3194 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3195 atomic_inc(&adapter->running_cap_crqs);
3196 ibmvnic_send_crq(adapter, &crq);
3197
3198 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3199 atomic_inc(&adapter->running_cap_crqs);
3200 ibmvnic_send_crq(adapter, &crq);
3201
3202 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3203 atomic_inc(&adapter->running_cap_crqs);
3204 ibmvnic_send_crq(adapter, &crq);
3205
3206 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3207 atomic_inc(&adapter->running_cap_crqs);
3208 ibmvnic_send_crq(adapter, &crq);
3209
3210 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3211 atomic_inc(&adapter->running_cap_crqs);
3212 ibmvnic_send_crq(adapter, &crq);
3213
3214 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3215 atomic_inc(&adapter->running_cap_crqs);
3216 ibmvnic_send_crq(adapter, &crq);
3217
3218 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3219 atomic_inc(&adapter->running_cap_crqs);
3220 ibmvnic_send_crq(adapter, &crq);
3221
3222 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3223 atomic_inc(&adapter->running_cap_crqs);
3224 ibmvnic_send_crq(adapter, &crq);
3225
3226 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3227 atomic_inc(&adapter->running_cap_crqs);
3228 ibmvnic_send_crq(adapter, &crq);
3229
3230 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3231 atomic_inc(&adapter->running_cap_crqs);
3232 ibmvnic_send_crq(adapter, &crq);
3233
3234 crq.query_capability.capability =
3235 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3236 atomic_inc(&adapter->running_cap_crqs);
3237 ibmvnic_send_crq(adapter, &crq);
3238
3239 crq.query_capability.capability =
3240 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3241 atomic_inc(&adapter->running_cap_crqs);
3242 ibmvnic_send_crq(adapter, &crq);
3243
3244 crq.query_capability.capability =
3245 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3246 atomic_inc(&adapter->running_cap_crqs);
3247 ibmvnic_send_crq(adapter, &crq);
3248
3249 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3250 atomic_inc(&adapter->running_cap_crqs);
3251 ibmvnic_send_crq(adapter, &crq);
3252 }
3253
3254 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3255 struct ibmvnic_adapter *adapter)
3256 {
3257 struct device *dev = &adapter->vdev->dev;
3258
3259 if (crq->get_vpd_size_rsp.rc.code) {
3260 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3261 crq->get_vpd_size_rsp.rc.code);
3262 complete(&adapter->fw_done);
3263 return;
3264 }
3265
3266 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3267 complete(&adapter->fw_done);
3268 }
3269
3270 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3271 struct ibmvnic_adapter *adapter)
3272 {
3273 struct device *dev = &adapter->vdev->dev;
3274 unsigned char *substr = NULL, *ptr = NULL;
3275 u8 fw_level_len = 0;
3276
3277 memset(adapter->fw_version, 0, 32);
3278
3279 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3280 DMA_FROM_DEVICE);
3281
3282 if (crq->get_vpd_rsp.rc.code) {
3283 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3284 crq->get_vpd_rsp.rc.code);
3285 goto complete;
3286 }
3287
3288 /* get the position of the firmware version info
3289 * located after the ASCII 'RM' substring in the buffer
3290 */
3291 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3292 if (!substr) {
3293 dev_info(dev, "No FW level provided by VPD\n");
3294 goto complete;
3295 }
3296
3297 /* get length of firmware level ASCII substring */
3298 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3299 fw_level_len = *(substr + 2);
3300 } else {
3301 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3302 goto complete;
3303 }
3304
3305 /* copy firmware version string from vpd into adapter */
3306 if ((substr + 3 + fw_level_len) <
3307 (adapter->vpd->buff + adapter->vpd->len)) {
3308 ptr = strncpy((char *)adapter->fw_version,
3309 substr + 3, fw_level_len);
3310
3311 if (!ptr)
3312 dev_err(dev, "Failed to isolate FW level string\n");
3313 } else {
3314 dev_info(dev, "FW substr extrapolated VPD buff\n");
3315 }
3316
3317 complete:
3318 complete(&adapter->fw_done);
3319 }
3320
3321 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3322 {
3323 struct device *dev = &adapter->vdev->dev;
3324 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3325 union ibmvnic_crq crq;
3326 int i;
3327
3328 dma_unmap_single(dev, adapter->ip_offload_tok,
3329 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3330
3331 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3332 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3333 netdev_dbg(adapter->netdev, "%016lx\n",
3334 ((unsigned long int *)(buf))[i]);
3335
3336 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3337 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3338 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3339 buf->tcp_ipv4_chksum);
3340 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3341 buf->tcp_ipv6_chksum);
3342 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3343 buf->udp_ipv4_chksum);
3344 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3345 buf->udp_ipv6_chksum);
3346 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3347 buf->large_tx_ipv4);
3348 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3349 buf->large_tx_ipv6);
3350 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3351 buf->large_rx_ipv4);
3352 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3353 buf->large_rx_ipv6);
3354 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3355 buf->max_ipv4_header_size);
3356 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3357 buf->max_ipv6_header_size);
3358 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3359 buf->max_tcp_header_size);
3360 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3361 buf->max_udp_header_size);
3362 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3363 buf->max_large_tx_size);
3364 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3365 buf->max_large_rx_size);
3366 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3367 buf->ipv6_extension_header);
3368 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3369 buf->tcp_pseudosum_req);
3370 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3371 buf->num_ipv6_ext_headers);
3372 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3373 buf->off_ipv6_ext_headers);
3374
3375 adapter->ip_offload_ctrl_tok =
3376 dma_map_single(dev, &adapter->ip_offload_ctrl,
3377 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3378
3379 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3380 dev_err(dev, "Couldn't map ip offload control buffer\n");
3381 return;
3382 }
3383
3384 adapter->ip_offload_ctrl.len =
3385 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3386 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3387 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3388 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3389 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3390 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3391 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3392 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3393 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3394 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3395
3396 /* large_rx disabled for now, additional features needed */
3397 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3398 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3399
3400 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3401
3402 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3403 adapter->netdev->features |= NETIF_F_IP_CSUM;
3404
3405 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3406 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3407
3408 if ((adapter->netdev->features &
3409 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3410 adapter->netdev->features |= NETIF_F_RXCSUM;
3411
3412 if (buf->large_tx_ipv4)
3413 adapter->netdev->features |= NETIF_F_TSO;
3414 if (buf->large_tx_ipv6)
3415 adapter->netdev->features |= NETIF_F_TSO6;
3416
3417 adapter->netdev->hw_features |= adapter->netdev->features;
3418
3419 memset(&crq, 0, sizeof(crq));
3420 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3421 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3422 crq.control_ip_offload.len =
3423 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3424 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3425 ibmvnic_send_crq(adapter, &crq);
3426 }
3427
3428 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3429 struct ibmvnic_adapter *adapter)
3430 {
3431 struct device *dev = &adapter->vdev->dev;
3432 struct ibmvnic_error_buff *error_buff, *tmp;
3433 unsigned long flags;
3434 bool found = false;
3435 int i;
3436
3437 if (!crq->request_error_rsp.rc.code) {
3438 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3439 crq->request_error_rsp.rc.code);
3440 return;
3441 }
3442
3443 spin_lock_irqsave(&adapter->error_list_lock, flags);
3444 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3445 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3446 found = true;
3447 list_del(&error_buff->list);
3448 break;
3449 }
3450 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3451
3452 if (!found) {
3453 dev_err(dev, "Couldn't find error id %x\n",
3454 be32_to_cpu(crq->request_error_rsp.error_id));
3455 return;
3456 }
3457
3458 dev_err(dev, "Detailed info for error id %x:",
3459 be32_to_cpu(crq->request_error_rsp.error_id));
3460
3461 for (i = 0; i < error_buff->len; i++) {
3462 pr_cont("%02x", (int)error_buff->buff[i]);
3463 if (i % 8 == 7)
3464 pr_cont(" ");
3465 }
3466 pr_cont("\n");
3467
3468 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3469 DMA_FROM_DEVICE);
3470 kfree(error_buff->buff);
3471 kfree(error_buff);
3472 }
3473
3474 static void request_error_information(struct ibmvnic_adapter *adapter,
3475 union ibmvnic_crq *err_crq)
3476 {
3477 struct device *dev = &adapter->vdev->dev;
3478 struct net_device *netdev = adapter->netdev;
3479 struct ibmvnic_error_buff *error_buff;
3480 unsigned long timeout = msecs_to_jiffies(30000);
3481 union ibmvnic_crq crq;
3482 unsigned long flags;
3483 int rc, detail_len;
3484
3485 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3486 if (!error_buff)
3487 return;
3488
3489 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3490 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3491 if (!error_buff->buff) {
3492 kfree(error_buff);
3493 return;
3494 }
3495
3496 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3497 DMA_FROM_DEVICE);
3498 if (dma_mapping_error(dev, error_buff->dma)) {
3499 netdev_err(netdev, "Couldn't map error buffer\n");
3500 kfree(error_buff->buff);
3501 kfree(error_buff);
3502 return;
3503 }
3504
3505 error_buff->len = detail_len;
3506 error_buff->error_id = err_crq->error_indication.error_id;
3507
3508 spin_lock_irqsave(&adapter->error_list_lock, flags);
3509 list_add_tail(&error_buff->list, &adapter->errors);
3510 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3511
3512 memset(&crq, 0, sizeof(crq));
3513 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3514 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3515 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3516 crq.request_error_info.len = cpu_to_be32(detail_len);
3517 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3518
3519 rc = ibmvnic_send_crq(adapter, &crq);
3520 if (rc) {
3521 netdev_err(netdev, "failed to request error information\n");
3522 goto err_info_fail;
3523 }
3524
3525 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3526 netdev_err(netdev, "timeout waiting for error information\n");
3527 goto err_info_fail;
3528 }
3529
3530 return;
3531
3532 err_info_fail:
3533 spin_lock_irqsave(&adapter->error_list_lock, flags);
3534 list_del(&error_buff->list);
3535 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3536
3537 kfree(error_buff->buff);
3538 kfree(error_buff);
3539 }
3540
3541 static void handle_error_indication(union ibmvnic_crq *crq,
3542 struct ibmvnic_adapter *adapter)
3543 {
3544 struct device *dev = &adapter->vdev->dev;
3545
3546 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3547 crq->error_indication.flags
3548 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3549 be32_to_cpu(crq->error_indication.error_id),
3550 be16_to_cpu(crq->error_indication.error_cause));
3551
3552 if (be32_to_cpu(crq->error_indication.error_id))
3553 request_error_information(adapter, crq);
3554
3555 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3556 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3557 else
3558 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3559 }
3560
3561 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3562 struct ibmvnic_adapter *adapter)
3563 {
3564 struct net_device *netdev = adapter->netdev;
3565 struct device *dev = &adapter->vdev->dev;
3566 long rc;
3567
3568 rc = crq->change_mac_addr_rsp.rc.code;
3569 if (rc) {
3570 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3571 return;
3572 }
3573 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3574 ETH_ALEN);
3575 }
3576
3577 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3578 struct ibmvnic_adapter *adapter)
3579 {
3580 struct device *dev = &adapter->vdev->dev;
3581 u64 *req_value;
3582 char *name;
3583
3584 atomic_dec(&adapter->running_cap_crqs);
3585 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3586 case REQ_TX_QUEUES:
3587 req_value = &adapter->req_tx_queues;
3588 name = "tx";
3589 break;
3590 case REQ_RX_QUEUES:
3591 req_value = &adapter->req_rx_queues;
3592 name = "rx";
3593 break;
3594 case REQ_RX_ADD_QUEUES:
3595 req_value = &adapter->req_rx_add_queues;
3596 name = "rx_add";
3597 break;
3598 case REQ_TX_ENTRIES_PER_SUBCRQ:
3599 req_value = &adapter->req_tx_entries_per_subcrq;
3600 name = "tx_entries_per_subcrq";
3601 break;
3602 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3603 req_value = &adapter->req_rx_add_entries_per_subcrq;
3604 name = "rx_add_entries_per_subcrq";
3605 break;
3606 case REQ_MTU:
3607 req_value = &adapter->req_mtu;
3608 name = "mtu";
3609 break;
3610 case PROMISC_REQUESTED:
3611 req_value = &adapter->promisc;
3612 name = "promisc";
3613 break;
3614 default:
3615 dev_err(dev, "Got invalid cap request rsp %d\n",
3616 crq->request_capability.capability);
3617 return;
3618 }
3619
3620 switch (crq->request_capability_rsp.rc.code) {
3621 case SUCCESS:
3622 break;
3623 case PARTIALSUCCESS:
3624 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3625 *req_value,
3626 (long int)be64_to_cpu(crq->request_capability_rsp.
3627 number), name);
3628
3629 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3630 REQ_MTU) {
3631 pr_err("mtu of %llu is not supported. Reverting.\n",
3632 *req_value);
3633 *req_value = adapter->fallback.mtu;
3634 } else {
3635 *req_value =
3636 be64_to_cpu(crq->request_capability_rsp.number);
3637 }
3638
3639 ibmvnic_send_req_caps(adapter, 1);
3640 return;
3641 default:
3642 dev_err(dev, "Error %d in request cap rsp\n",
3643 crq->request_capability_rsp.rc.code);
3644 return;
3645 }
3646
3647 /* Done receiving requested capabilities, query IP offload support */
3648 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3649 union ibmvnic_crq newcrq;
3650 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3651 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3652 &adapter->ip_offload_buf;
3653
3654 adapter->wait_capability = false;
3655 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3656 buf_sz,
3657 DMA_FROM_DEVICE);
3658
3659 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3660 if (!firmware_has_feature(FW_FEATURE_CMO))
3661 dev_err(dev, "Couldn't map offload buffer\n");
3662 return;
3663 }
3664
3665 memset(&newcrq, 0, sizeof(newcrq));
3666 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3667 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3668 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3669 newcrq.query_ip_offload.ioba =
3670 cpu_to_be32(adapter->ip_offload_tok);
3671
3672 ibmvnic_send_crq(adapter, &newcrq);
3673 }
3674 }
3675
3676 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3677 struct ibmvnic_adapter *adapter)
3678 {
3679 struct device *dev = &adapter->vdev->dev;
3680 struct net_device *netdev = adapter->netdev;
3681 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3682 struct ibmvnic_login_buffer *login = adapter->login_buf;
3683 int i;
3684
3685 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3686 DMA_BIDIRECTIONAL);
3687 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3688 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3689
3690 /* If the number of queues requested can't be allocated by the
3691 * server, the login response will return with code 1. We will need
3692 * to resend the login buffer with fewer queues requested.
3693 */
3694 if (login_rsp_crq->generic.rc.code) {
3695 adapter->renegotiate = true;
3696 complete(&adapter->init_done);
3697 return 0;
3698 }
3699
3700 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3701
3702 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3703 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3704 netdev_dbg(adapter->netdev, "%016lx\n",
3705 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3706 }
3707
3708 /* Sanity checks */
3709 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3710 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3711 adapter->req_rx_add_queues !=
3712 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3713 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3714 ibmvnic_remove(adapter->vdev);
3715 return -EIO;
3716 }
3717 complete(&adapter->init_done);
3718
3719 return 0;
3720 }
3721
3722 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3723 struct ibmvnic_adapter *adapter)
3724 {
3725 struct device *dev = &adapter->vdev->dev;
3726 long rc;
3727
3728 rc = crq->request_unmap_rsp.rc.code;
3729 if (rc)
3730 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3731 }
3732
3733 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3734 struct ibmvnic_adapter *adapter)
3735 {
3736 struct net_device *netdev = adapter->netdev;
3737 struct device *dev = &adapter->vdev->dev;
3738 long rc;
3739
3740 rc = crq->query_map_rsp.rc.code;
3741 if (rc) {
3742 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3743 return;
3744 }
3745 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3746 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3747 crq->query_map_rsp.free_pages);
3748 }
3749
3750 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3751 struct ibmvnic_adapter *adapter)
3752 {
3753 struct net_device *netdev = adapter->netdev;
3754 struct device *dev = &adapter->vdev->dev;
3755 long rc;
3756
3757 atomic_dec(&adapter->running_cap_crqs);
3758 netdev_dbg(netdev, "Outstanding queries: %d\n",
3759 atomic_read(&adapter->running_cap_crqs));
3760 rc = crq->query_capability.rc.code;
3761 if (rc) {
3762 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3763 goto out;
3764 }
3765
3766 switch (be16_to_cpu(crq->query_capability.capability)) {
3767 case MIN_TX_QUEUES:
3768 adapter->min_tx_queues =
3769 be64_to_cpu(crq->query_capability.number);
3770 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3771 adapter->min_tx_queues);
3772 break;
3773 case MIN_RX_QUEUES:
3774 adapter->min_rx_queues =
3775 be64_to_cpu(crq->query_capability.number);
3776 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3777 adapter->min_rx_queues);
3778 break;
3779 case MIN_RX_ADD_QUEUES:
3780 adapter->min_rx_add_queues =
3781 be64_to_cpu(crq->query_capability.number);
3782 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3783 adapter->min_rx_add_queues);
3784 break;
3785 case MAX_TX_QUEUES:
3786 adapter->max_tx_queues =
3787 be64_to_cpu(crq->query_capability.number);
3788 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3789 adapter->max_tx_queues);
3790 break;
3791 case MAX_RX_QUEUES:
3792 adapter->max_rx_queues =
3793 be64_to_cpu(crq->query_capability.number);
3794 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3795 adapter->max_rx_queues);
3796 break;
3797 case MAX_RX_ADD_QUEUES:
3798 adapter->max_rx_add_queues =
3799 be64_to_cpu(crq->query_capability.number);
3800 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3801 adapter->max_rx_add_queues);
3802 break;
3803 case MIN_TX_ENTRIES_PER_SUBCRQ:
3804 adapter->min_tx_entries_per_subcrq =
3805 be64_to_cpu(crq->query_capability.number);
3806 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3807 adapter->min_tx_entries_per_subcrq);
3808 break;
3809 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3810 adapter->min_rx_add_entries_per_subcrq =
3811 be64_to_cpu(crq->query_capability.number);
3812 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3813 adapter->min_rx_add_entries_per_subcrq);
3814 break;
3815 case MAX_TX_ENTRIES_PER_SUBCRQ:
3816 adapter->max_tx_entries_per_subcrq =
3817 be64_to_cpu(crq->query_capability.number);
3818 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3819 adapter->max_tx_entries_per_subcrq);
3820 break;
3821 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3822 adapter->max_rx_add_entries_per_subcrq =
3823 be64_to_cpu(crq->query_capability.number);
3824 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3825 adapter->max_rx_add_entries_per_subcrq);
3826 break;
3827 case TCP_IP_OFFLOAD:
3828 adapter->tcp_ip_offload =
3829 be64_to_cpu(crq->query_capability.number);
3830 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3831 adapter->tcp_ip_offload);
3832 break;
3833 case PROMISC_SUPPORTED:
3834 adapter->promisc_supported =
3835 be64_to_cpu(crq->query_capability.number);
3836 netdev_dbg(netdev, "promisc_supported = %lld\n",
3837 adapter->promisc_supported);
3838 break;
3839 case MIN_MTU:
3840 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3841 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3842 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3843 break;
3844 case MAX_MTU:
3845 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3846 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3847 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3848 break;
3849 case MAX_MULTICAST_FILTERS:
3850 adapter->max_multicast_filters =
3851 be64_to_cpu(crq->query_capability.number);
3852 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3853 adapter->max_multicast_filters);
3854 break;
3855 case VLAN_HEADER_INSERTION:
3856 adapter->vlan_header_insertion =
3857 be64_to_cpu(crq->query_capability.number);
3858 if (adapter->vlan_header_insertion)
3859 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3860 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3861 adapter->vlan_header_insertion);
3862 break;
3863 case RX_VLAN_HEADER_INSERTION:
3864 adapter->rx_vlan_header_insertion =
3865 be64_to_cpu(crq->query_capability.number);
3866 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3867 adapter->rx_vlan_header_insertion);
3868 break;
3869 case MAX_TX_SG_ENTRIES:
3870 adapter->max_tx_sg_entries =
3871 be64_to_cpu(crq->query_capability.number);
3872 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3873 adapter->max_tx_sg_entries);
3874 break;
3875 case RX_SG_SUPPORTED:
3876 adapter->rx_sg_supported =
3877 be64_to_cpu(crq->query_capability.number);
3878 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3879 adapter->rx_sg_supported);
3880 break;
3881 case OPT_TX_COMP_SUB_QUEUES:
3882 adapter->opt_tx_comp_sub_queues =
3883 be64_to_cpu(crq->query_capability.number);
3884 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3885 adapter->opt_tx_comp_sub_queues);
3886 break;
3887 case OPT_RX_COMP_QUEUES:
3888 adapter->opt_rx_comp_queues =
3889 be64_to_cpu(crq->query_capability.number);
3890 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3891 adapter->opt_rx_comp_queues);
3892 break;
3893 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3894 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3895 be64_to_cpu(crq->query_capability.number);
3896 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3897 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3898 break;
3899 case OPT_TX_ENTRIES_PER_SUBCRQ:
3900 adapter->opt_tx_entries_per_subcrq =
3901 be64_to_cpu(crq->query_capability.number);
3902 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3903 adapter->opt_tx_entries_per_subcrq);
3904 break;
3905 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3906 adapter->opt_rxba_entries_per_subcrq =
3907 be64_to_cpu(crq->query_capability.number);
3908 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3909 adapter->opt_rxba_entries_per_subcrq);
3910 break;
3911 case TX_RX_DESC_REQ:
3912 adapter->tx_rx_desc_req = crq->query_capability.number;
3913 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3914 adapter->tx_rx_desc_req);
3915 break;
3916
3917 default:
3918 netdev_err(netdev, "Got invalid cap rsp %d\n",
3919 crq->query_capability.capability);
3920 }
3921
3922 out:
3923 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3924 adapter->wait_capability = false;
3925 ibmvnic_send_req_caps(adapter, 0);
3926 }
3927 }
3928
3929 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3930 struct ibmvnic_adapter *adapter)
3931 {
3932 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3933 struct net_device *netdev = adapter->netdev;
3934 struct device *dev = &adapter->vdev->dev;
3935 u64 *u64_crq = (u64 *)crq;
3936 long rc;
3937
3938 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3939 (unsigned long int)cpu_to_be64(u64_crq[0]),
3940 (unsigned long int)cpu_to_be64(u64_crq[1]));
3941 switch (gen_crq->first) {
3942 case IBMVNIC_CRQ_INIT_RSP:
3943 switch (gen_crq->cmd) {
3944 case IBMVNIC_CRQ_INIT:
3945 dev_info(dev, "Partner initialized\n");
3946 adapter->from_passive_init = true;
3947 complete(&adapter->init_done);
3948 break;
3949 case IBMVNIC_CRQ_INIT_COMPLETE:
3950 dev_info(dev, "Partner initialization complete\n");
3951 send_version_xchg(adapter);
3952 break;
3953 default:
3954 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3955 }
3956 return;
3957 case IBMVNIC_CRQ_XPORT_EVENT:
3958 netif_carrier_off(netdev);
3959 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3960 dev_info(dev, "Migrated, re-enabling adapter\n");
3961 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3962 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3963 dev_info(dev, "Backing device failover detected\n");
3964 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3965 } else {
3966 /* The adapter lost the connection */
3967 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3968 gen_crq->cmd);
3969 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3970 }
3971 return;
3972 case IBMVNIC_CRQ_CMD_RSP:
3973 break;
3974 default:
3975 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3976 gen_crq->first);
3977 return;
3978 }
3979
3980 switch (gen_crq->cmd) {
3981 case VERSION_EXCHANGE_RSP:
3982 rc = crq->version_exchange_rsp.rc.code;
3983 if (rc) {
3984 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3985 break;
3986 }
3987 dev_info(dev, "Partner protocol version is %d\n",
3988 crq->version_exchange_rsp.version);
3989 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3990 ibmvnic_version)
3991 ibmvnic_version =
3992 be16_to_cpu(crq->version_exchange_rsp.version);
3993 send_cap_queries(adapter);
3994 break;
3995 case QUERY_CAPABILITY_RSP:
3996 handle_query_cap_rsp(crq, adapter);
3997 break;
3998 case QUERY_MAP_RSP:
3999 handle_query_map_rsp(crq, adapter);
4000 break;
4001 case REQUEST_MAP_RSP:
4002 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4003 complete(&adapter->fw_done);
4004 break;
4005 case REQUEST_UNMAP_RSP:
4006 handle_request_unmap_rsp(crq, adapter);
4007 break;
4008 case REQUEST_CAPABILITY_RSP:
4009 handle_request_cap_rsp(crq, adapter);
4010 break;
4011 case LOGIN_RSP:
4012 netdev_dbg(netdev, "Got Login Response\n");
4013 handle_login_rsp(crq, adapter);
4014 break;
4015 case LOGICAL_LINK_STATE_RSP:
4016 netdev_dbg(netdev,
4017 "Got Logical Link State Response, state: %d rc: %d\n",
4018 crq->logical_link_state_rsp.link_state,
4019 crq->logical_link_state_rsp.rc.code);
4020 adapter->logical_link_state =
4021 crq->logical_link_state_rsp.link_state;
4022 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4023 complete(&adapter->init_done);
4024 break;
4025 case LINK_STATE_INDICATION:
4026 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4027 adapter->phys_link_state =
4028 crq->link_state_indication.phys_link_state;
4029 adapter->logical_link_state =
4030 crq->link_state_indication.logical_link_state;
4031 break;
4032 case CHANGE_MAC_ADDR_RSP:
4033 netdev_dbg(netdev, "Got MAC address change Response\n");
4034 handle_change_mac_rsp(crq, adapter);
4035 break;
4036 case ERROR_INDICATION:
4037 netdev_dbg(netdev, "Got Error Indication\n");
4038 handle_error_indication(crq, adapter);
4039 break;
4040 case REQUEST_ERROR_RSP:
4041 netdev_dbg(netdev, "Got Error Detail Response\n");
4042 handle_error_info_rsp(crq, adapter);
4043 break;
4044 case REQUEST_STATISTICS_RSP:
4045 netdev_dbg(netdev, "Got Statistics Response\n");
4046 complete(&adapter->stats_done);
4047 break;
4048 case QUERY_IP_OFFLOAD_RSP:
4049 netdev_dbg(netdev, "Got Query IP offload Response\n");
4050 handle_query_ip_offload_rsp(adapter);
4051 break;
4052 case MULTICAST_CTRL_RSP:
4053 netdev_dbg(netdev, "Got multicast control Response\n");
4054 break;
4055 case CONTROL_IP_OFFLOAD_RSP:
4056 netdev_dbg(netdev, "Got Control IP offload Response\n");
4057 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4058 sizeof(adapter->ip_offload_ctrl),
4059 DMA_TO_DEVICE);
4060 complete(&adapter->init_done);
4061 break;
4062 case COLLECT_FW_TRACE_RSP:
4063 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4064 complete(&adapter->fw_done);
4065 break;
4066 case GET_VPD_SIZE_RSP:
4067 handle_vpd_size_rsp(crq, adapter);
4068 break;
4069 case GET_VPD_RSP:
4070 handle_vpd_rsp(crq, adapter);
4071 break;
4072 default:
4073 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4074 gen_crq->cmd);
4075 }
4076 }
4077
4078 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4079 {
4080 struct ibmvnic_adapter *adapter = instance;
4081
4082 tasklet_schedule(&adapter->tasklet);
4083 return IRQ_HANDLED;
4084 }
4085
4086 static void ibmvnic_tasklet(void *data)
4087 {
4088 struct ibmvnic_adapter *adapter = data;
4089 struct ibmvnic_crq_queue *queue = &adapter->crq;
4090 union ibmvnic_crq *crq;
4091 unsigned long flags;
4092 bool done = false;
4093
4094 spin_lock_irqsave(&queue->lock, flags);
4095 while (!done) {
4096 /* Pull all the valid messages off the CRQ */
4097 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4098 ibmvnic_handle_crq(crq, adapter);
4099 crq->generic.first = 0;
4100 }
4101
4102 /* remain in tasklet until all
4103 * capabilities responses are received
4104 */
4105 if (!adapter->wait_capability)
4106 done = true;
4107 }
4108 /* if capabilities CRQ's were sent in this tasklet, the following
4109 * tasklet must wait until all responses are received
4110 */
4111 if (atomic_read(&adapter->running_cap_crqs) != 0)
4112 adapter->wait_capability = true;
4113 spin_unlock_irqrestore(&queue->lock, flags);
4114 }
4115
4116 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4117 {
4118 struct vio_dev *vdev = adapter->vdev;
4119 int rc;
4120
4121 do {
4122 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4123 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4124
4125 if (rc)
4126 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4127
4128 return rc;
4129 }
4130
4131 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4132 {
4133 struct ibmvnic_crq_queue *crq = &adapter->crq;
4134 struct device *dev = &adapter->vdev->dev;
4135 struct vio_dev *vdev = adapter->vdev;
4136 int rc;
4137
4138 /* Close the CRQ */
4139 do {
4140 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4141 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4142
4143 /* Clean out the queue */
4144 memset(crq->msgs, 0, PAGE_SIZE);
4145 crq->cur = 0;
4146
4147 /* And re-open it again */
4148 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4149 crq->msg_token, PAGE_SIZE);
4150
4151 if (rc == H_CLOSED)
4152 /* Adapter is good, but other end is not ready */
4153 dev_warn(dev, "Partner adapter not ready\n");
4154 else if (rc != 0)
4155 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4156
4157 return rc;
4158 }
4159
4160 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4161 {
4162 struct ibmvnic_crq_queue *crq = &adapter->crq;
4163 struct vio_dev *vdev = adapter->vdev;
4164 long rc;
4165
4166 if (!crq->msgs)
4167 return;
4168
4169 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4170 free_irq(vdev->irq, adapter);
4171 tasklet_kill(&adapter->tasklet);
4172 do {
4173 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4174 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4175
4176 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4177 DMA_BIDIRECTIONAL);
4178 free_page((unsigned long)crq->msgs);
4179 crq->msgs = NULL;
4180 }
4181
4182 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4183 {
4184 struct ibmvnic_crq_queue *crq = &adapter->crq;
4185 struct device *dev = &adapter->vdev->dev;
4186 struct vio_dev *vdev = adapter->vdev;
4187 int rc, retrc = -ENOMEM;
4188
4189 if (crq->msgs)
4190 return 0;
4191
4192 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4193 /* Should we allocate more than one page? */
4194
4195 if (!crq->msgs)
4196 return -ENOMEM;
4197
4198 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4199 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4200 DMA_BIDIRECTIONAL);
4201 if (dma_mapping_error(dev, crq->msg_token))
4202 goto map_failed;
4203
4204 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4205 crq->msg_token, PAGE_SIZE);
4206
4207 if (rc == H_RESOURCE)
4208 /* maybe kexecing and resource is busy. try a reset */
4209 rc = ibmvnic_reset_crq(adapter);
4210 retrc = rc;
4211
4212 if (rc == H_CLOSED) {
4213 dev_warn(dev, "Partner adapter not ready\n");
4214 } else if (rc) {
4215 dev_warn(dev, "Error %d opening adapter\n", rc);
4216 goto reg_crq_failed;
4217 }
4218
4219 retrc = 0;
4220
4221 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4222 (unsigned long)adapter);
4223
4224 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4225 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4226 adapter);
4227 if (rc) {
4228 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4229 vdev->irq, rc);
4230 goto req_irq_failed;
4231 }
4232
4233 rc = vio_enable_interrupts(vdev);
4234 if (rc) {
4235 dev_err(dev, "Error %d enabling interrupts\n", rc);
4236 goto req_irq_failed;
4237 }
4238
4239 crq->cur = 0;
4240 spin_lock_init(&crq->lock);
4241
4242 return retrc;
4243
4244 req_irq_failed:
4245 tasklet_kill(&adapter->tasklet);
4246 do {
4247 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4248 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4249 reg_crq_failed:
4250 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4251 map_failed:
4252 free_page((unsigned long)crq->msgs);
4253 crq->msgs = NULL;
4254 return retrc;
4255 }
4256
4257 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4258 {
4259 struct device *dev = &adapter->vdev->dev;
4260 unsigned long timeout = msecs_to_jiffies(30000);
4261 int rc;
4262
4263 if (adapter->resetting && !adapter->wait_for_reset) {
4264 rc = ibmvnic_reset_crq(adapter);
4265 if (!rc)
4266 rc = vio_enable_interrupts(adapter->vdev);
4267 } else {
4268 rc = init_crq_queue(adapter);
4269 }
4270
4271 if (rc) {
4272 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4273 return rc;
4274 }
4275
4276 adapter->from_passive_init = false;
4277
4278 init_completion(&adapter->init_done);
4279 adapter->init_done_rc = 0;
4280 ibmvnic_send_crq_init(adapter);
4281 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4282 dev_err(dev, "Initialization sequence timed out\n");
4283 return -1;
4284 }
4285
4286 if (adapter->init_done_rc) {
4287 release_crq_queue(adapter);
4288 return adapter->init_done_rc;
4289 }
4290
4291 if (adapter->from_passive_init) {
4292 adapter->state = VNIC_OPEN;
4293 adapter->from_passive_init = false;
4294 return -1;
4295 }
4296
4297 if (adapter->resetting && !adapter->wait_for_reset)
4298 rc = reset_sub_crq_queues(adapter);
4299 else
4300 rc = init_sub_crqs(adapter);
4301 if (rc) {
4302 dev_err(dev, "Initialization of sub crqs failed\n");
4303 release_crq_queue(adapter);
4304 return rc;
4305 }
4306
4307 rc = init_sub_crq_irqs(adapter);
4308 if (rc) {
4309 dev_err(dev, "Failed to initialize sub crq irqs\n");
4310 release_crq_queue(adapter);
4311 }
4312
4313 return rc;
4314 }
4315
4316 static struct device_attribute dev_attr_failover;
4317
4318 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4319 {
4320 struct ibmvnic_adapter *adapter;
4321 struct net_device *netdev;
4322 unsigned char *mac_addr_p;
4323 int rc;
4324
4325 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4326 dev->unit_address);
4327
4328 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4329 VETH_MAC_ADDR, NULL);
4330 if (!mac_addr_p) {
4331 dev_err(&dev->dev,
4332 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4333 __FILE__, __LINE__);
4334 return 0;
4335 }
4336
4337 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4338 IBMVNIC_MAX_TX_QUEUES);
4339 if (!netdev)
4340 return -ENOMEM;
4341
4342 adapter = netdev_priv(netdev);
4343 adapter->state = VNIC_PROBING;
4344 dev_set_drvdata(&dev->dev, netdev);
4345 adapter->vdev = dev;
4346 adapter->netdev = netdev;
4347
4348 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4349 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4350 netdev->irq = dev->irq;
4351 netdev->netdev_ops = &ibmvnic_netdev_ops;
4352 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4353 SET_NETDEV_DEV(netdev, &dev->dev);
4354
4355 spin_lock_init(&adapter->stats_lock);
4356
4357 INIT_LIST_HEAD(&adapter->errors);
4358 spin_lock_init(&adapter->error_list_lock);
4359
4360 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4361 INIT_LIST_HEAD(&adapter->rwi_list);
4362 mutex_init(&adapter->reset_lock);
4363 mutex_init(&adapter->rwi_lock);
4364 adapter->resetting = false;
4365
4366 adapter->mac_change_pending = false;
4367
4368 do {
4369 rc = ibmvnic_init(adapter);
4370 if (rc && rc != EAGAIN)
4371 goto ibmvnic_init_fail;
4372 } while (rc == EAGAIN);
4373
4374 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4375 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4376 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4377
4378 rc = device_create_file(&dev->dev, &dev_attr_failover);
4379 if (rc)
4380 goto ibmvnic_init_fail;
4381
4382 netif_carrier_off(netdev);
4383 rc = register_netdev(netdev);
4384 if (rc) {
4385 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4386 goto ibmvnic_register_fail;
4387 }
4388 dev_info(&dev->dev, "ibmvnic registered\n");
4389
4390 adapter->state = VNIC_PROBED;
4391
4392 adapter->wait_for_reset = false;
4393
4394 return 0;
4395
4396 ibmvnic_register_fail:
4397 device_remove_file(&dev->dev, &dev_attr_failover);
4398
4399 ibmvnic_init_fail:
4400 release_sub_crqs(adapter);
4401 release_crq_queue(adapter);
4402 free_netdev(netdev);
4403
4404 return rc;
4405 }
4406
4407 static int ibmvnic_remove(struct vio_dev *dev)
4408 {
4409 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4410 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4411
4412 adapter->state = VNIC_REMOVING;
4413 unregister_netdev(netdev);
4414 mutex_lock(&adapter->reset_lock);
4415
4416 release_resources(adapter);
4417 release_sub_crqs(adapter);
4418 release_crq_queue(adapter);
4419
4420 adapter->state = VNIC_REMOVED;
4421
4422 mutex_unlock(&adapter->reset_lock);
4423 device_remove_file(&dev->dev, &dev_attr_failover);
4424 free_netdev(netdev);
4425 dev_set_drvdata(&dev->dev, NULL);
4426
4427 return 0;
4428 }
4429
4430 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4431 const char *buf, size_t count)
4432 {
4433 struct net_device *netdev = dev_get_drvdata(dev);
4434 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4435 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4436 __be64 session_token;
4437 long rc;
4438
4439 if (!sysfs_streq(buf, "1"))
4440 return -EINVAL;
4441
4442 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4443 H_GET_SESSION_TOKEN, 0, 0, 0);
4444 if (rc) {
4445 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4446 rc);
4447 return -EINVAL;
4448 }
4449
4450 session_token = (__be64)retbuf[0];
4451 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4452 be64_to_cpu(session_token));
4453 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4454 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4455 if (rc) {
4456 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4457 rc);
4458 return -EINVAL;
4459 }
4460
4461 return count;
4462 }
4463
4464 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
4465
4466 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4467 {
4468 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4469 struct ibmvnic_adapter *adapter;
4470 struct iommu_table *tbl;
4471 unsigned long ret = 0;
4472 int i;
4473
4474 tbl = get_iommu_table_base(&vdev->dev);
4475
4476 /* netdev inits at probe time along with the structures we need below*/
4477 if (!netdev)
4478 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4479
4480 adapter = netdev_priv(netdev);
4481
4482 ret += PAGE_SIZE; /* the crq message queue */
4483 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4484
4485 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4486 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4487
4488 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4489 i++)
4490 ret += adapter->rx_pool[i].size *
4491 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4492
4493 return ret;
4494 }
4495
4496 static int ibmvnic_resume(struct device *dev)
4497 {
4498 struct net_device *netdev = dev_get_drvdata(dev);
4499 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4500
4501 if (adapter->state != VNIC_OPEN)
4502 return 0;
4503
4504 tasklet_schedule(&adapter->tasklet);
4505
4506 return 0;
4507 }
4508
4509 static const struct vio_device_id ibmvnic_device_table[] = {
4510 {"network", "IBM,vnic"},
4511 {"", "" }
4512 };
4513 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4514
4515 static const struct dev_pm_ops ibmvnic_pm_ops = {
4516 .resume = ibmvnic_resume
4517 };
4518
4519 static struct vio_driver ibmvnic_driver = {
4520 .id_table = ibmvnic_device_table,
4521 .probe = ibmvnic_probe,
4522 .remove = ibmvnic_remove,
4523 .get_desired_dma = ibmvnic_get_desired_dma,
4524 .name = ibmvnic_driver_name,
4525 .pm = &ibmvnic_pm_ops,
4526 };
4527
4528 /* module functions */
4529 static int __init ibmvnic_module_init(void)
4530 {
4531 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4532 IBMVNIC_DRIVER_VERSION);
4533
4534 return vio_register_driver(&ibmvnic_driver);
4535 }
4536
4537 static void __exit ibmvnic_module_exit(void)
4538 {
4539 vio_unregister_driver(&ibmvnic_driver);
4540 }
4541
4542 module_init(ibmvnic_module_init);
4543 module_exit(ibmvnic_module_exit);
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