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[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / ibm / ibmvnic.c
CommitLineData
032c5e82
TF		 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>
ad7775dc 64#include <linux/ipv6.h>
032c5e82
TF		 65#include <linux/irq.h>
66#include <linux/kthread.h>
67#include <linux/seq_file.h>
68#include <linux/debugfs.h>
69#include <linux/interrupt.h>
70#include <net/net_namespace.h>
71#include <asm/hvcall.h>
72#include <linux/atomic.h>
73#include <asm/vio.h>
74#include <asm/iommu.h>
75#include <linux/uaccess.h>
76#include <asm/firmware.h>
65dc6891 77#include <linux/workqueue.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
ea22d51a 92static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
032c5e82
TF		 93static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
94static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
95static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
96static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
97static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
98 union sub_crq *sub_crq);
ad7775dc 99static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 100static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
101static int enable_scrq_irq(struct ibmvnic_adapter *,
102 struct ibmvnic_sub_crq_queue *);
103static int disable_scrq_irq(struct ibmvnic_adapter *,
104 struct ibmvnic_sub_crq_queue *);
105static int pending_scrq(struct ibmvnic_adapter *,
106 struct ibmvnic_sub_crq_queue *);
107static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
108 struct ibmvnic_sub_crq_queue *);
109static int ibmvnic_poll(struct napi_struct *napi, int data);
110static void send_map_query(struct ibmvnic_adapter *adapter);
111static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
112static void send_request_unmap(struct ibmvnic_adapter *, u8);
113
114struct ibmvnic_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117};
118
119#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
120 offsetof(struct ibmvnic_statistics, stat))
121#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
122
123static const struct ibmvnic_stat ibmvnic_stats[] = {
124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
146};
147
148static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
149 unsigned long length, unsigned long *number,
150 unsigned long *irq)
151{
152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
153 long rc;
154
155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
156 *number = retbuf[0];
157 *irq = retbuf[1];
158
159 return rc;
160}
161
162/* net_device_ops functions */
163
164static void init_rx_pool(struct ibmvnic_adapter *adapter,
165 struct ibmvnic_rx_pool *rx_pool, int num, int index,
166 int buff_size, int active)
167{
168 netdev_dbg(adapter->netdev,
169 "Initializing rx_pool %d, %d buffs, %d bytes each\n",
170 index, num, buff_size);
171 rx_pool->size = num;
172 rx_pool->index = index;
173 rx_pool->buff_size = buff_size;
174 rx_pool->active = active;
175}
176
177static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
178 struct ibmvnic_long_term_buff *ltb, int size)
179{
180 struct device *dev = &adapter->vdev->dev;
181
182 ltb->size = size;
183 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
184 GFP_KERNEL);
185
186 if (!ltb->buff) {
187 dev_err(dev, "Couldn't alloc long term buffer\n");
188 return -ENOMEM;
189 }
190 ltb->map_id = adapter->map_id;
191 adapter->map_id++;
192 send_request_map(adapter, ltb->addr,
193 ltb->size, ltb->map_id);
194 init_completion(&adapter->fw_done);
195 wait_for_completion(&adapter->fw_done);
196 return 0;
197}
198
199static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
201{
202 struct device *dev = &adapter->vdev->dev;
203
204 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
dfad09a6
TF		 205 if (!adapter->failover)
206 send_request_unmap(adapter, ltb->map_id);
032c5e82
TF		 207}
208
209static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
210 struct ibmvnic_rx_pool *pool)
211{
212 struct device *dev = &adapter->vdev->dev;
213 int i;
214
215 pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
216 if (!pool->free_map)
217 return -ENOMEM;
218
219 pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
220 GFP_KERNEL);
221
222 if (!pool->rx_buff) {
223 dev_err(dev, "Couldn't alloc rx buffers\n");
224 kfree(pool->free_map);
225 return -ENOMEM;
226 }
227
228 if (alloc_long_term_buff(adapter, &pool->long_term_buff,
229 pool->size * pool->buff_size)) {
230 kfree(pool->free_map);
231 kfree(pool->rx_buff);
232 return -ENOMEM;
233 }
234
235 for (i = 0; i < pool->size; ++i)
236 pool->free_map[i] = i;
237
238 atomic_set(&pool->available, 0);
239 pool->next_alloc = 0;
240 pool->next_free = 0;
241
242 return 0;
243}
244
245static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
246 struct ibmvnic_rx_pool *pool)
247{
248 int count = pool->size - atomic_read(&pool->available);
249 struct device *dev = &adapter->vdev->dev;
250 int buffers_added = 0;
251 unsigned long lpar_rc;
252 union sub_crq sub_crq;
253 struct sk_buff *skb;
254 unsigned int offset;
255 dma_addr_t dma_addr;
256 unsigned char *dst;
257 u64 *handle_array;
258 int shift = 0;
259 int index;
260 int i;
261
262 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
263 be32_to_cpu(adapter->login_rsp_buf->
264 off_rxadd_subcrqs));
265
266 for (i = 0; i < count; ++i) {
267 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
268 if (!skb) {
269 dev_err(dev, "Couldn't replenish rx buff\n");
270 adapter->replenish_no_mem++;
271 break;
272 }
273
274 index = pool->free_map[pool->next_free];
275
276 if (pool->rx_buff[index].skb)
277 dev_err(dev, "Inconsistent free_map!\n");
278
279 /* Copy the skb to the long term mapped DMA buffer */
280 offset = index * pool->buff_size;
281 dst = pool->long_term_buff.buff + offset;
282 memset(dst, 0, pool->buff_size);
283 dma_addr = pool->long_term_buff.addr + offset;
284 pool->rx_buff[index].data = dst;
285
286 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
287 pool->rx_buff[index].dma = dma_addr;
288 pool->rx_buff[index].skb = skb;
289 pool->rx_buff[index].pool_index = pool->index;
290 pool->rx_buff[index].size = pool->buff_size;
291
292 memset(&sub_crq, 0, sizeof(sub_crq));
293 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
294 sub_crq.rx_add.correlator =
295 cpu_to_be64((u64)&pool->rx_buff[index]);
296 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
297 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
298
299 /* The length field of the sCRQ is defined to be 24 bits so the
300 * buffer size needs to be left shifted by a byte before it is
301 * converted to big endian to prevent the last byte from being
302 * truncated.
303 */
304#ifdef __LITTLE_ENDIAN__
305 shift = 8;
306#endif
307 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
308
309 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
310 &sub_crq);
311 if (lpar_rc != H_SUCCESS)
312 goto failure;
313
314 buffers_added++;
315 adapter->replenish_add_buff_success++;
316 pool->next_free = (pool->next_free + 1) % pool->size;
317 }
318 atomic_add(buffers_added, &pool->available);
319 return;
320
321failure:
322 dev_info(dev, "replenish pools failure\n");
323 pool->free_map[pool->next_free] = index;
324 pool->rx_buff[index].skb = NULL;
325 if (!dma_mapping_error(dev, dma_addr))
326 dma_unmap_single(dev, dma_addr, pool->buff_size,
327 DMA_FROM_DEVICE);
328
329 dev_kfree_skb_any(skb);
330 adapter->replenish_add_buff_failure++;
331 atomic_add(buffers_added, &pool->available);
332}
333
334static void replenish_pools(struct ibmvnic_adapter *adapter)
335{
336 int i;
337
338 if (adapter->migrated)
339 return;
340
341 adapter->replenish_task_cycles++;
342 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
343 i++) {
344 if (adapter->rx_pool[i].active)
345 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
346 }
347}
348
349static void free_rx_pool(struct ibmvnic_adapter *adapter,
350 struct ibmvnic_rx_pool *pool)
351{
352 int i;
353
354 kfree(pool->free_map);
355 pool->free_map = NULL;
356
357 if (!pool->rx_buff)
358 return;
359
360 for (i = 0; i < pool->size; i++) {
361 if (pool->rx_buff[i].skb) {
362 dev_kfree_skb_any(pool->rx_buff[i].skb);
363 pool->rx_buff[i].skb = NULL;
364 }
365 }
366 kfree(pool->rx_buff);
367 pool->rx_buff = NULL;
368}
369
370static int ibmvnic_open(struct net_device *netdev)
371{
372 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
373 struct device *dev = &adapter->vdev->dev;
374 struct ibmvnic_tx_pool *tx_pool;
375 union ibmvnic_crq crq;
376 int rxadd_subcrqs;
377 u64 *size_array;
378 int tx_subcrqs;
379 int i, j;
380
381 rxadd_subcrqs =
382 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
383 tx_subcrqs =
384 be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
385 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
386 be32_to_cpu(adapter->login_rsp_buf->
387 off_rxadd_buff_size));
388 adapter->map_id = 1;
389 adapter->napi = kcalloc(adapter->req_rx_queues,
390 sizeof(struct napi_struct), GFP_KERNEL);
391 if (!adapter->napi)
392 goto alloc_napi_failed;
393 for (i = 0; i < adapter->req_rx_queues; i++) {
394 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
395 NAPI_POLL_WEIGHT);
396 napi_enable(&adapter->napi[i]);
397 }
398 adapter->rx_pool =
399 kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
400
401 if (!adapter->rx_pool)
402 goto rx_pool_arr_alloc_failed;
403 send_map_query(adapter);
404 for (i = 0; i < rxadd_subcrqs; i++) {
405 init_rx_pool(adapter, &adapter->rx_pool[i],
406 IBMVNIC_BUFFS_PER_POOL, i,
407 be64_to_cpu(size_array[i]), 1);
408 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
409 dev_err(dev, "Couldn't alloc rx pool\n");
410 goto rx_pool_alloc_failed;
411 }
412 }
413 adapter->tx_pool =
414 kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
415
416 if (!adapter->tx_pool)
417 goto tx_pool_arr_alloc_failed;
418 for (i = 0; i < tx_subcrqs; i++) {
419 tx_pool = &adapter->tx_pool[i];
420 tx_pool->tx_buff =
421 kcalloc(adapter->max_tx_entries_per_subcrq,
422 sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
423 if (!tx_pool->tx_buff)
424 goto tx_pool_alloc_failed;
425
426 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
427 adapter->max_tx_entries_per_subcrq *
428 adapter->req_mtu))
429 goto tx_ltb_alloc_failed;
430
431 tx_pool->free_map =
432 kcalloc(adapter->max_tx_entries_per_subcrq,
433 sizeof(int), GFP_KERNEL);
434 if (!tx_pool->free_map)
435 goto tx_fm_alloc_failed;
436
437 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
438 tx_pool->free_map[j] = j;
439
440 tx_pool->consumer_index = 0;
441 tx_pool->producer_index = 0;
442 }
443 adapter->bounce_buffer_size =
444 (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
445 adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
446 GFP_KERNEL);
447 if (!adapter->bounce_buffer)
448 goto bounce_alloc_failed;
449
450 adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
451 adapter->bounce_buffer_size,
452 DMA_TO_DEVICE);
453 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
454 dev_err(dev, "Couldn't map tx bounce buffer\n");
455 goto bounce_map_failed;
456 }
457 replenish_pools(adapter);
458
459 /* We're ready to receive frames, enable the sub-crq interrupts and
460 * set the logical link state to up
461 */
462 for (i = 0; i < adapter->req_rx_queues; i++)
463 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
464
465 for (i = 0; i < adapter->req_tx_queues; i++)
466 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
467
468 memset(&crq, 0, sizeof(crq));
469 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
470 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
471 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
472 ibmvnic_send_crq(adapter, &crq);
473
b8efb894
TF		 474 netif_tx_start_all_queues(netdev);
475
032c5e82
TF		 476 return 0;
477
478bounce_map_failed:
479 kfree(adapter->bounce_buffer);
480bounce_alloc_failed:
481 i = tx_subcrqs - 1;
482 kfree(adapter->tx_pool[i].free_map);
483tx_fm_alloc_failed:
484 free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
485tx_ltb_alloc_failed:
486 kfree(adapter->tx_pool[i].tx_buff);
487tx_pool_alloc_failed:
488 for (j = 0; j < i; j++) {
489 kfree(adapter->tx_pool[j].tx_buff);
490 free_long_term_buff(adapter,
491 &adapter->tx_pool[j].long_term_buff);
492 kfree(adapter->tx_pool[j].free_map);
493 }
494 kfree(adapter->tx_pool);
495 adapter->tx_pool = NULL;
496tx_pool_arr_alloc_failed:
497 i = rxadd_subcrqs;
498rx_pool_alloc_failed:
499 for (j = 0; j < i; j++) {
500 free_rx_pool(adapter, &adapter->rx_pool[j]);
501 free_long_term_buff(adapter,
502 &adapter->rx_pool[j].long_term_buff);
503 }
504 kfree(adapter->rx_pool);
505 adapter->rx_pool = NULL;
506rx_pool_arr_alloc_failed:
507 for (i = 0; i < adapter->req_rx_queues; i++)
508 napi_enable(&adapter->napi[i]);
509alloc_napi_failed:
510 return -ENOMEM;
511}
512
513static int ibmvnic_close(struct net_device *netdev)
514{
515 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
516 struct device *dev = &adapter->vdev->dev;
517 union ibmvnic_crq crq;
518 int i;
519
520 adapter->closing = true;
521
522 for (i = 0; i < adapter->req_rx_queues; i++)
523 napi_disable(&adapter->napi[i]);
524
dfad09a6
TF		 525 if (!adapter->failover)
526 netif_tx_stop_all_queues(netdev);
032c5e82
TF		 527
528 if (adapter->bounce_buffer) {
529 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
530 dma_unmap_single(&adapter->vdev->dev,
531 adapter->bounce_buffer_dma,
532 adapter->bounce_buffer_size,
533 DMA_BIDIRECTIONAL);
534 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
535 }
536 kfree(adapter->bounce_buffer);
537 adapter->bounce_buffer = NULL;
538 }
539
540 memset(&crq, 0, sizeof(crq));
541 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
542 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
543 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
544 ibmvnic_send_crq(adapter, &crq);
545
546 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 i++) {
548 kfree(adapter->tx_pool[i].tx_buff);
549 free_long_term_buff(adapter,
550 &adapter->tx_pool[i].long_term_buff);
551 kfree(adapter->tx_pool[i].free_map);
552 }
553 kfree(adapter->tx_pool);
554 adapter->tx_pool = NULL;
555
556 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
557 i++) {
558 free_rx_pool(adapter, &adapter->rx_pool[i]);
559 free_long_term_buff(adapter,
560 &adapter->rx_pool[i].long_term_buff);
561 }
562 kfree(adapter->rx_pool);
563 adapter->rx_pool = NULL;
564
565 adapter->closing = false;
566
567 return 0;
568}
569
ad7775dc
TF		 570/**
571 * build_hdr_data - creates L2/L3/L4 header data buffer
572 * @hdr_field - bitfield determining needed headers
573 * @skb - socket buffer
574 * @hdr_len - array of header lengths
575 * @tot_len - total length of data
576 *
577 * Reads hdr_field to determine which headers are needed by firmware.
578 * Builds a buffer containing these headers. Saves individual header
579 * lengths and total buffer length to be used to build descriptors.
580 */
581static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
582 int *hdr_len, u8 *hdr_data)
583{
584 int len = 0;
585 u8 *hdr;
586
587 hdr_len[0] = sizeof(struct ethhdr);
588
589 if (skb->protocol == htons(ETH_P_IP)) {
590 hdr_len[1] = ip_hdr(skb)->ihl * 4;
591 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
592 hdr_len[2] = tcp_hdrlen(skb);
593 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
594 hdr_len[2] = sizeof(struct udphdr);
595 } else if (skb->protocol == htons(ETH_P_IPV6)) {
596 hdr_len[1] = sizeof(struct ipv6hdr);
597 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
598 hdr_len[2] = tcp_hdrlen(skb);
599 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
600 hdr_len[2] = sizeof(struct udphdr);
601 }
602
603 memset(hdr_data, 0, 120);
604 if ((hdr_field >> 6) & 1) {
605 hdr = skb_mac_header(skb);
606 memcpy(hdr_data, hdr, hdr_len[0]);
607 len += hdr_len[0];
608 }
609
610 if ((hdr_field >> 5) & 1) {
611 hdr = skb_network_header(skb);
612 memcpy(hdr_data + len, hdr, hdr_len[1]);
613 len += hdr_len[1];
614 }
615
616 if ((hdr_field >> 4) & 1) {
617 hdr = skb_transport_header(skb);
618 memcpy(hdr_data + len, hdr, hdr_len[2]);
619 len += hdr_len[2];
620 }
621 return len;
622}
623
624/**
625 * create_hdr_descs - create header and header extension descriptors
626 * @hdr_field - bitfield determining needed headers
627 * @data - buffer containing header data
628 * @len - length of data buffer
629 * @hdr_len - array of individual header lengths
630 * @scrq_arr - descriptor array
631 *
632 * Creates header and, if needed, header extension descriptors and
633 * places them in a descriptor array, scrq_arr
634 */
635
636static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
637 union sub_crq *scrq_arr)
638{
639 union sub_crq hdr_desc;
640 int tmp_len = len;
641 u8 *data, *cur;
642 int tmp;
643
644 while (tmp_len > 0) {
645 cur = hdr_data + len - tmp_len;
646
647 memset(&hdr_desc, 0, sizeof(hdr_desc));
648 if (cur != hdr_data) {
649 data = hdr_desc.hdr_ext.data;
650 tmp = tmp_len > 29 ? 29 : tmp_len;
651 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
652 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
653 hdr_desc.hdr_ext.len = tmp;
654 } else {
655 data = hdr_desc.hdr.data;
656 tmp = tmp_len > 24 ? 24 : tmp_len;
657 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
658 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
659 hdr_desc.hdr.len = tmp;
660 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
661 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
662 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
663 hdr_desc.hdr.flag = hdr_field << 1;
664 }
665 memcpy(data, cur, tmp);
666 tmp_len -= tmp;
667 *scrq_arr = hdr_desc;
668 scrq_arr++;
669 }
670}
671
672/**
673 * build_hdr_descs_arr - build a header descriptor array
674 * @skb - socket buffer
675 * @num_entries - number of descriptors to be sent
676 * @subcrq - first TX descriptor
677 * @hdr_field - bit field determining which headers will be sent
678 *
679 * This function will build a TX descriptor array with applicable
680 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
681 */
682
683static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
684 int *num_entries, u8 hdr_field)
685{
686 int hdr_len[3] = {0, 0, 0};
687 int tot_len, len;
688 u8 *hdr_data = txbuff->hdr_data;
689
690 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
691 txbuff->hdr_data);
692 len = tot_len;
693 len -= 24;
694 if (len > 0)
695 num_entries += len % 29 ? len / 29 + 1 : len / 29;
696 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
697 txbuff->indir_arr + 1);
698}
699
032c5e82
TF		 700static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
701{
702 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
703 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 704 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 705 struct device *dev = &adapter->vdev->dev;
706 struct ibmvnic_tx_buff *tx_buff = NULL;
707 struct ibmvnic_tx_pool *tx_pool;
708 unsigned int tx_send_failed = 0;
709 unsigned int tx_map_failed = 0;
710 unsigned int tx_dropped = 0;
711 unsigned int tx_packets = 0;
712 unsigned int tx_bytes = 0;
713 dma_addr_t data_dma_addr;
714 struct netdev_queue *txq;
715 bool used_bounce = false;
716 unsigned long lpar_rc;
717 union sub_crq tx_crq;
718 unsigned int offset;
ad7775dc 719 int num_entries = 1;
032c5e82
TF		 720 unsigned char *dst;
721 u64 *handle_array;
722 int index = 0;
723 int ret = 0;
724
725 tx_pool = &adapter->tx_pool[queue_num];
726 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
727 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
728 be32_to_cpu(adapter->login_rsp_buf->
729 off_txsubm_subcrqs));
730 if (adapter->migrated) {
731 tx_send_failed++;
732 tx_dropped++;
733 ret = NETDEV_TX_BUSY;
734 goto out;
735 }
736
737 index = tx_pool->free_map[tx_pool->consumer_index];
738 offset = index * adapter->req_mtu;
739 dst = tx_pool->long_term_buff.buff + offset;
740 memset(dst, 0, adapter->req_mtu);
741 skb_copy_from_linear_data(skb, dst, skb->len);
742 data_dma_addr = tx_pool->long_term_buff.addr + offset;
743
744 tx_pool->consumer_index =
745 (tx_pool->consumer_index + 1) %
746 adapter->max_tx_entries_per_subcrq;
747
748 tx_buff = &tx_pool->tx_buff[index];
749 tx_buff->skb = skb;
750 tx_buff->data_dma[0] = data_dma_addr;
751 tx_buff->data_len[0] = skb->len;
752 tx_buff->index = index;
753 tx_buff->pool_index = queue_num;
754 tx_buff->last_frag = true;
755 tx_buff->used_bounce = used_bounce;
756
757 memset(&tx_crq, 0, sizeof(tx_crq));
758 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
759 tx_crq.v1.type = IBMVNIC_TX_DESC;
760 tx_crq.v1.n_crq_elem = 1;
761 tx_crq.v1.n_sge = 1;
762 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
763 tx_crq.v1.correlator = cpu_to_be32(index);
764 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
765 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
766 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
767
768 if (adapter->vlan_header_insertion) {
769 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
770 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
771 }
772
773 if (skb->protocol == htons(ETH_P_IP)) {
774 if (ip_hdr(skb)->version == 4)
775 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
776 else if (ip_hdr(skb)->version == 6)
777 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
778
779 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
780 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
781 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
782 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
783 }
784
ad7775dc 785 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 786 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 787 hdrs += 2;
788 }
789 /* determine if l2/3/4 headers are sent to firmware */
790 if ((*hdrs >> 7) & 1 &&
791 (skb->protocol == htons(ETH_P_IP) ||
792 skb->protocol == htons(ETH_P_IPV6))) {
793 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
794 tx_crq.v1.n_crq_elem = num_entries;
795 tx_buff->indir_arr[0] = tx_crq;
796 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
797 sizeof(tx_buff->indir_arr),
798 DMA_TO_DEVICE);
799 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
800 if (!firmware_has_feature(FW_FEATURE_CMO))
801 dev_err(dev, "tx: unable to map descriptor array\n");
802 tx_map_failed++;
803 tx_dropped++;
804 ret = NETDEV_TX_BUSY;
805 goto out;
806 }
498cd8e4 807 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 808 (u64)tx_buff->indir_dma,
809 (u64)num_entries);
810 } else {
498cd8e4
JA		 811 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
812 &tx_crq);
ad7775dc 813 }
032c5e82
TF		 814 if (lpar_rc != H_SUCCESS) {
815 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
816
817 if (tx_pool->consumer_index == 0)
818 tx_pool->consumer_index =
819 adapter->max_tx_entries_per_subcrq - 1;
820 else
821 tx_pool->consumer_index--;
822
823 tx_send_failed++;
824 tx_dropped++;
825 ret = NETDEV_TX_BUSY;
826 goto out;
827 }
828 tx_packets++;
829 tx_bytes += skb->len;
830 txq->trans_start = jiffies;
831 ret = NETDEV_TX_OK;
832
833out:
834 netdev->stats.tx_dropped += tx_dropped;
835 netdev->stats.tx_bytes += tx_bytes;
836 netdev->stats.tx_packets += tx_packets;
837 adapter->tx_send_failed += tx_send_failed;
838 adapter->tx_map_failed += tx_map_failed;
839
840 return ret;
841}
842
843static void ibmvnic_set_multi(struct net_device *netdev)
844{
845 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
846 struct netdev_hw_addr *ha;
847 union ibmvnic_crq crq;
848
849 memset(&crq, 0, sizeof(crq));
850 crq.request_capability.first = IBMVNIC_CRQ_CMD;
851 crq.request_capability.cmd = REQUEST_CAPABILITY;
852
853 if (netdev->flags & IFF_PROMISC) {
854 if (!adapter->promisc_supported)
855 return;
856 } else {
857 if (netdev->flags & IFF_ALLMULTI) {
858 /* Accept all multicast */
859 memset(&crq, 0, sizeof(crq));
860 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
861 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
862 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
863 ibmvnic_send_crq(adapter, &crq);
864 } else if (netdev_mc_empty(netdev)) {
865 /* Reject all multicast */
866 memset(&crq, 0, sizeof(crq));
867 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
868 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
869 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
870 ibmvnic_send_crq(adapter, &crq);
871 } else {
872 /* Accept one or more multicast(s) */
873 netdev_for_each_mc_addr(ha, netdev) {
874 memset(&crq, 0, sizeof(crq));
875 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
876 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
877 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
878 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
879 ha->addr);
880 ibmvnic_send_crq(adapter, &crq);
881 }
882 }
883 }
884}
885
886static int ibmvnic_set_mac(struct net_device *netdev, void *p)
887{
888 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
889 struct sockaddr *addr = p;
890 union ibmvnic_crq crq;
891
892 if (!is_valid_ether_addr(addr->sa_data))
893 return -EADDRNOTAVAIL;
894
895 memset(&crq, 0, sizeof(crq));
896 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
897 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
898 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
899 ibmvnic_send_crq(adapter, &crq);
900 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
901 return 0;
902}
903
904static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
905{
906 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
907
908 if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
909 return -EINVAL;
910
911 netdev->mtu = new_mtu;
912 return 0;
913}
914
915static void ibmvnic_tx_timeout(struct net_device *dev)
916{
917 struct ibmvnic_adapter *adapter = netdev_priv(dev);
918 int rc;
919
920 /* Adapter timed out, resetting it */
921 release_sub_crqs(adapter);
922 rc = ibmvnic_reset_crq(adapter);
923 if (rc)
924 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
925 else
926 ibmvnic_send_crq_init(adapter);
927}
928
929static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
930 struct ibmvnic_rx_buff *rx_buff)
931{
932 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
933
934 rx_buff->skb = NULL;
935
936 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
937 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
938
939 atomic_dec(&pool->available);
940}
941
942static int ibmvnic_poll(struct napi_struct *napi, int budget)
943{
944 struct net_device *netdev = napi->dev;
945 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
946 int scrq_num = (int)(napi - adapter->napi);
947 int frames_processed = 0;
948restart_poll:
949 while (frames_processed < budget) {
950 struct sk_buff *skb;
951 struct ibmvnic_rx_buff *rx_buff;
952 union sub_crq *next;
953 u32 length;
954 u16 offset;
955 u8 flags = 0;
956
957 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
958 break;
959 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
960 rx_buff =
961 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
962 rx_comp.correlator);
963 /* do error checking */
964 if (next->rx_comp.rc) {
965 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
966 /* free the entry */
967 next->rx_comp.first = 0;
968 remove_buff_from_pool(adapter, rx_buff);
969 break;
970 }
971
972 length = be32_to_cpu(next->rx_comp.len);
973 offset = be16_to_cpu(next->rx_comp.off_frame_data);
974 flags = next->rx_comp.flags;
975 skb = rx_buff->skb;
976 skb_copy_to_linear_data(skb, rx_buff->data + offset,
977 length);
978 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
979 /* free the entry */
980 next->rx_comp.first = 0;
981 remove_buff_from_pool(adapter, rx_buff);
982
983 skb_put(skb, length);
984 skb->protocol = eth_type_trans(skb, netdev);
985
986 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
987 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
988 skb->ip_summed = CHECKSUM_UNNECESSARY;
989 }
990
991 length = skb->len;
992 napi_gro_receive(napi, skb); /* send it up */
993 netdev->stats.rx_packets++;
994 netdev->stats.rx_bytes += length;
995 frames_processed++;
996 }
498cd8e4 997 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 998
999 if (frames_processed < budget) {
1000 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1001 napi_complete(napi);
1002 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1003 napi_reschedule(napi)) {
1004 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1005 goto restart_poll;
1006 }
1007 }
1008 return frames_processed;
1009}
1010
1011#ifdef CONFIG_NET_POLL_CONTROLLER
1012static void ibmvnic_netpoll_controller(struct net_device *dev)
1013{
1014 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1015 int i;
1016
1017 replenish_pools(netdev_priv(dev));
1018 for (i = 0; i < adapter->req_rx_queues; i++)
1019 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1020 adapter->rx_scrq[i]);
1021}
1022#endif
1023
1024static const struct net_device_ops ibmvnic_netdev_ops = {
1025 .ndo_open = ibmvnic_open,
1026 .ndo_stop = ibmvnic_close,
1027 .ndo_start_xmit = ibmvnic_xmit,
1028 .ndo_set_rx_mode = ibmvnic_set_multi,
1029 .ndo_set_mac_address = ibmvnic_set_mac,
1030 .ndo_validate_addr = eth_validate_addr,
1031 .ndo_change_mtu = ibmvnic_change_mtu,
1032 .ndo_tx_timeout = ibmvnic_tx_timeout,
1033#ifdef CONFIG_NET_POLL_CONTROLLER
1034 .ndo_poll_controller = ibmvnic_netpoll_controller,
1035#endif
1036};
1037
1038/* ethtool functions */
1039
1040static int ibmvnic_get_settings(struct net_device *netdev,
1041 struct ethtool_cmd *cmd)
1042{
1043 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1044 SUPPORTED_FIBRE);
1045 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1046 ADVERTISED_FIBRE);
1047 ethtool_cmd_speed_set(cmd, SPEED_1000);
1048 cmd->duplex = DUPLEX_FULL;
1049 cmd->port = PORT_FIBRE;
1050 cmd->phy_address = 0;
1051 cmd->transceiver = XCVR_INTERNAL;
1052 cmd->autoneg = AUTONEG_ENABLE;
1053 cmd->maxtxpkt = 0;
1054 cmd->maxrxpkt = 1;
1055 return 0;
1056}
1057
1058static void ibmvnic_get_drvinfo(struct net_device *dev,
1059 struct ethtool_drvinfo *info)
1060{
1061 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1062 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1063}
1064
1065static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1066{
1067 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1068
1069 return adapter->msg_enable;
1070}
1071
1072static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1073{
1074 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1075
1076 adapter->msg_enable = data;
1077}
1078
1079static u32 ibmvnic_get_link(struct net_device *netdev)
1080{
1081 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1082
1083 /* Don't need to send a query because we request a logical link up at
1084 * init and then we wait for link state indications
1085 */
1086 return adapter->logical_link_state;
1087}
1088
1089static void ibmvnic_get_ringparam(struct net_device *netdev,
1090 struct ethtool_ringparam *ring)
1091{
1092 ring->rx_max_pending = 0;
1093 ring->tx_max_pending = 0;
1094 ring->rx_mini_max_pending = 0;
1095 ring->rx_jumbo_max_pending = 0;
1096 ring->rx_pending = 0;
1097 ring->tx_pending = 0;
1098 ring->rx_mini_pending = 0;
1099 ring->rx_jumbo_pending = 0;
1100}
1101
1102static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1103{
1104 int i;
1105
1106 if (stringset != ETH_SS_STATS)
1107 return;
1108
1109 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1110 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1111}
1112
1113static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1114{
1115 switch (sset) {
1116 case ETH_SS_STATS:
1117 return ARRAY_SIZE(ibmvnic_stats);
1118 default:
1119 return -EOPNOTSUPP;
1120 }
1121}
1122
1123static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1124 struct ethtool_stats *stats, u64 *data)
1125{
1126 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1127 union ibmvnic_crq crq;
1128 int i;
1129
1130 memset(&crq, 0, sizeof(crq));
1131 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1132 crq.request_statistics.cmd = REQUEST_STATISTICS;
1133 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1134 crq.request_statistics.len =
1135 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1136 ibmvnic_send_crq(adapter, &crq);
1137
1138 /* Wait for data to be written */
1139 init_completion(&adapter->stats_done);
1140 wait_for_completion(&adapter->stats_done);
1141
1142 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1143 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1144}
1145
1146static const struct ethtool_ops ibmvnic_ethtool_ops = {
1147 .get_settings = ibmvnic_get_settings,
1148 .get_drvinfo = ibmvnic_get_drvinfo,
1149 .get_msglevel = ibmvnic_get_msglevel,
1150 .set_msglevel = ibmvnic_set_msglevel,
1151 .get_link = ibmvnic_get_link,
1152 .get_ringparam = ibmvnic_get_ringparam,
1153 .get_strings = ibmvnic_get_strings,
1154 .get_sset_count = ibmvnic_get_sset_count,
1155 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1156};
1157
1158/* Routines for managing CRQs/sCRQs */
1159
1160static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1161 struct ibmvnic_sub_crq_queue *scrq)
1162{
1163 struct device *dev = &adapter->vdev->dev;
1164 long rc;
1165
1166 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1167
1168 /* Close the sub-crqs */
1169 do {
1170 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1171 adapter->vdev->unit_address,
1172 scrq->crq_num);
1173 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1174
1175 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1176 DMA_BIDIRECTIONAL);
1177 free_pages((unsigned long)scrq->msgs, 2);
1178 kfree(scrq);
1179}
1180
1181static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1182 *adapter)
1183{
1184 struct device *dev = &adapter->vdev->dev;
1185 struct ibmvnic_sub_crq_queue *scrq;
1186 int rc;
1187
1188 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1189 if (!scrq)
1190 return NULL;
1191
12608c26 1192 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
032c5e82
TF		 1193 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1194 if (!scrq->msgs) {
1195 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1196 goto zero_page_failed;
1197 }
1198
1199 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1200 DMA_BIDIRECTIONAL);
1201 if (dma_mapping_error(dev, scrq->msg_token)) {
1202 dev_warn(dev, "Couldn't map crq queue messages page\n");
1203 goto map_failed;
1204 }
1205
1206 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1207 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1208
1209 if (rc == H_RESOURCE)
1210 rc = ibmvnic_reset_crq(adapter);
1211
1212 if (rc == H_CLOSED) {
1213 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1214 } else if (rc) {
1215 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1216 goto reg_failed;
1217 }
1218
032c5e82
TF		 1219 scrq->adapter = adapter;
1220 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1221 scrq->cur = 0;
1222 scrq->rx_skb_top = NULL;
1223 spin_lock_init(&scrq->lock);
1224
1225 netdev_dbg(adapter->netdev,
1226 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1227 scrq->crq_num, scrq->hw_irq, scrq->irq);
1228
1229 return scrq;
1230
032c5e82
TF		 1231reg_failed:
1232 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1233 DMA_BIDIRECTIONAL);
1234map_failed:
1235 free_pages((unsigned long)scrq->msgs, 2);
1236zero_page_failed:
1237 kfree(scrq);
1238
1239 return NULL;
1240}
1241
1242static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1243{
1244 int i;
1245
1246 if (adapter->tx_scrq) {
1247 for (i = 0; i < adapter->req_tx_queues; i++)
1248 if (adapter->tx_scrq[i]) {
1249 free_irq(adapter->tx_scrq[i]->irq,
1250 adapter->tx_scrq[i]);
88eb98a0 1251 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
032c5e82
TF		 1252 release_sub_crq_queue(adapter,
1253 adapter->tx_scrq[i]);
1254 }
1255 adapter->tx_scrq = NULL;
1256 }
1257
1258 if (adapter->rx_scrq) {
1259 for (i = 0; i < adapter->req_rx_queues; i++)
1260 if (adapter->rx_scrq[i]) {
1261 free_irq(adapter->rx_scrq[i]->irq,
1262 adapter->rx_scrq[i]);
88eb98a0 1263 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
032c5e82
TF		 1264 release_sub_crq_queue(adapter,
1265 adapter->rx_scrq[i]);
1266 }
1267 adapter->rx_scrq = NULL;
1268 }
1269
1270 adapter->requested_caps = 0;
1271}
1272
ea22d51a
TF		 1273static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1274{
1275 int i;
1276
1277 if (adapter->tx_scrq) {
1278 for (i = 0; i < adapter->req_tx_queues; i++)
1279 if (adapter->tx_scrq[i])
1280 release_sub_crq_queue(adapter,
1281 adapter->tx_scrq[i]);
1282 adapter->tx_scrq = NULL;
1283 }
1284
1285 if (adapter->rx_scrq) {
1286 for (i = 0; i < adapter->req_rx_queues; i++)
1287 if (adapter->rx_scrq[i])
1288 release_sub_crq_queue(adapter,
1289 adapter->rx_scrq[i]);
1290 adapter->rx_scrq = NULL;
1291 }
1292
1293 adapter->requested_caps = 0;
1294}
1295
032c5e82
TF		 1296static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1297 struct ibmvnic_sub_crq_queue *scrq)
1298{
1299 struct device *dev = &adapter->vdev->dev;
1300 unsigned long rc;
1301
1302 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1303 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1304 if (rc)
1305 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1306 scrq->hw_irq, rc);
1307 return rc;
1308}
1309
1310static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1311 struct ibmvnic_sub_crq_queue *scrq)
1312{
1313 struct device *dev = &adapter->vdev->dev;
1314 unsigned long rc;
1315
1316 if (scrq->hw_irq > 0x100000000ULL) {
1317 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1318 return 1;
1319 }
1320
1321 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1322 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1323 if (rc)
1324 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1325 scrq->hw_irq, rc);
1326 return rc;
1327}
1328
1329static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1330 struct ibmvnic_sub_crq_queue *scrq)
1331{
1332 struct device *dev = &adapter->vdev->dev;
1333 struct ibmvnic_tx_buff *txbuff;
1334 union sub_crq *next;
1335 int index;
1336 int i, j;
ad7775dc 1337 u8 first;
032c5e82
TF		 1338
1339restart_loop:
1340 while (pending_scrq(adapter, scrq)) {
1341 unsigned int pool = scrq->pool_index;
1342
1343 next = ibmvnic_next_scrq(adapter, scrq);
1344 for (i = 0; i < next->tx_comp.num_comps; i++) {
1345 if (next->tx_comp.rcs[i]) {
1346 dev_err(dev, "tx error %x\n",
1347 next->tx_comp.rcs[i]);
1348 continue;
1349 }
1350 index = be32_to_cpu(next->tx_comp.correlators[i]);
1351 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1352
1353 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1354 if (!txbuff->data_dma[j])
1355 continue;
1356
1357 txbuff->data_dma[j] = 0;
1358 txbuff->used_bounce = false;
1359 }
ad7775dc
TF		 1360 /* if sub_crq was sent indirectly */
1361 first = txbuff->indir_arr[0].generic.first;
1362 if (first == IBMVNIC_CRQ_CMD) {
1363 dma_unmap_single(dev, txbuff->indir_dma,
1364 sizeof(txbuff->indir_arr),
1365 DMA_TO_DEVICE);
1366 }
032c5e82
TF		 1367
1368 if (txbuff->last_frag)
1369 dev_kfree_skb_any(txbuff->skb);
1370
1371 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1372 producer_index] = index;
1373 adapter->tx_pool[pool].producer_index =
1374 (adapter->tx_pool[pool].producer_index + 1) %
1375 adapter->max_tx_entries_per_subcrq;
1376 }
1377 /* remove tx_comp scrq*/
1378 next->tx_comp.first = 0;
1379 }
1380
1381 enable_scrq_irq(adapter, scrq);
1382
1383 if (pending_scrq(adapter, scrq)) {
1384 disable_scrq_irq(adapter, scrq);
1385 goto restart_loop;
1386 }
1387
1388 return 0;
1389}
1390
1391static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1392{
1393 struct ibmvnic_sub_crq_queue *scrq = instance;
1394 struct ibmvnic_adapter *adapter = scrq->adapter;
1395
1396 disable_scrq_irq(adapter, scrq);
1397 ibmvnic_complete_tx(adapter, scrq);
1398
1399 return IRQ_HANDLED;
1400}
1401
1402static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1403{
1404 struct ibmvnic_sub_crq_queue *scrq = instance;
1405 struct ibmvnic_adapter *adapter = scrq->adapter;
1406
1407 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1408 disable_scrq_irq(adapter, scrq);
1409 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1410 }
1411
1412 return IRQ_HANDLED;
1413}
1414
ea22d51a
TF		 1415static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1416{
1417 struct device *dev = &adapter->vdev->dev;
1418 struct ibmvnic_sub_crq_queue *scrq;
1419 int i = 0, j = 0;
1420 int rc = 0;
1421
1422 for (i = 0; i < adapter->req_tx_queues; i++) {
1423 scrq = adapter->tx_scrq[i];
1424 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1425
99c1790e 1426 if (!scrq->irq) {
ea22d51a
TF		 1427 rc = -EINVAL;
1428 dev_err(dev, "Error mapping irq\n");
1429 goto req_tx_irq_failed;
1430 }
1431
1432 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1433 0, "ibmvnic_tx", scrq);
1434
1435 if (rc) {
1436 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1437 scrq->irq, rc);
1438 irq_dispose_mapping(scrq->irq);
1439 goto req_rx_irq_failed;
1440 }
1441 }
1442
1443 for (i = 0; i < adapter->req_rx_queues; i++) {
1444 scrq = adapter->rx_scrq[i];
1445 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1446 if (!scrq->irq) {
ea22d51a
TF		 1447 rc = -EINVAL;
1448 dev_err(dev, "Error mapping irq\n");
1449 goto req_rx_irq_failed;
1450 }
1451 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1452 0, "ibmvnic_rx", scrq);
1453 if (rc) {
1454 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1455 scrq->irq, rc);
1456 irq_dispose_mapping(scrq->irq);
1457 goto req_rx_irq_failed;
1458 }
1459 }
1460 return rc;
1461
1462req_rx_irq_failed:
8bf371e6 1463 for (j = 0; j < i; j++) {
ea22d51a
TF		 1464 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1465 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1466 }
ea22d51a
TF		 1467 i = adapter->req_tx_queues;
1468req_tx_irq_failed:
8bf371e6 1469 for (j = 0; j < i; j++) {
ea22d51a
TF		 1470 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1471 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1472 }
ea22d51a
TF		 1473 release_sub_crqs_no_irqs(adapter);
1474 return rc;
1475}
1476
032c5e82
TF		 1477static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1478{
1479 struct device *dev = &adapter->vdev->dev;
1480 struct ibmvnic_sub_crq_queue **allqueues;
1481 int registered_queues = 0;
1482 union ibmvnic_crq crq;
1483 int total_queues;
1484 int more = 0;
ea22d51a 1485 int i;
032c5e82
TF		 1486
1487 if (!retry) {
1488 /* Sub-CRQ entries are 32 byte long */
1489 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1490
1491 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1492 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1493 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1494 goto allqueues_failed;
1495 }
1496
1497 /* Get the minimum between the queried max and the entries
1498 * that fit in our PAGE_SIZE
1499 */
1500 adapter->req_tx_entries_per_subcrq =
1501 adapter->max_tx_entries_per_subcrq > entries_page ?
1502 entries_page : adapter->max_tx_entries_per_subcrq;
1503 adapter->req_rx_add_entries_per_subcrq =
1504 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1505 entries_page : adapter->max_rx_add_entries_per_subcrq;
1506
6dbcd8fb
JA		 1507 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1508 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
498cd8e4 1509 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
032c5e82
TF		 1510
1511 adapter->req_mtu = adapter->max_mtu;
1512 }
1513
1514 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1515
1516 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1517 if (!allqueues)
1518 goto allqueues_failed;
1519
1520 for (i = 0; i < total_queues; i++) {
1521 allqueues[i] = init_sub_crq_queue(adapter);
1522 if (!allqueues[i]) {
1523 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1524 break;
1525 }
1526 registered_queues++;
1527 }
1528
1529 /* Make sure we were able to register the minimum number of queues */
1530 if (registered_queues <
1531 adapter->min_tx_queues + adapter->min_rx_queues) {
1532 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1533 goto tx_failed;
1534 }
1535
1536 /* Distribute the failed allocated queues*/
1537 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1538 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1539 switch (i % 3) {
1540 case 0:
1541 if (adapter->req_rx_queues > adapter->min_rx_queues)
1542 adapter->req_rx_queues--;
1543 else
1544 more++;
1545 break;
1546 case 1:
1547 if (adapter->req_tx_queues > adapter->min_tx_queues)
1548 adapter->req_tx_queues--;
1549 else
1550 more++;
1551 break;
1552 }
1553 }
1554
1555 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1556 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1557 if (!adapter->tx_scrq)
1558 goto tx_failed;
1559
1560 for (i = 0; i < adapter->req_tx_queues; i++) {
1561 adapter->tx_scrq[i] = allqueues[i];
1562 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 1563 }
1564
1565 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1566 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1567 if (!adapter->rx_scrq)
1568 goto rx_failed;
1569
1570 for (i = 0; i < adapter->req_rx_queues; i++) {
1571 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1572 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 1573 }
1574
1575 memset(&crq, 0, sizeof(crq));
1576 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1577 crq.request_capability.cmd = REQUEST_CAPABILITY;
1578
1579 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 1580 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
032c5e82
TF		 1581 ibmvnic_send_crq(adapter, &crq);
1582
1583 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 1584 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
032c5e82
TF		 1585 ibmvnic_send_crq(adapter, &crq);
1586
1587 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 1588 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
032c5e82
TF		 1589 ibmvnic_send_crq(adapter, &crq);
1590
1591 crq.request_capability.capability =
1592 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1593 crq.request_capability.number =
de89e854 1594 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
032c5e82
TF		 1595 ibmvnic_send_crq(adapter, &crq);
1596
1597 crq.request_capability.capability =
1598 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1599 crq.request_capability.number =
de89e854 1600 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
032c5e82
TF		 1601 ibmvnic_send_crq(adapter, &crq);
1602
1603 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 1604 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
032c5e82
TF		 1605 ibmvnic_send_crq(adapter, &crq);
1606
1607 if (adapter->netdev->flags & IFF_PROMISC) {
1608 if (adapter->promisc_supported) {
1609 crq.request_capability.capability =
1610 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1611 crq.request_capability.number = cpu_to_be64(1);
032c5e82
TF		 1612 ibmvnic_send_crq(adapter, &crq);
1613 }
1614 } else {
1615 crq.request_capability.capability =
1616 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1617 crq.request_capability.number = cpu_to_be64(0);
032c5e82
TF		 1618 ibmvnic_send_crq(adapter, &crq);
1619 }
1620
1621 kfree(allqueues);
1622
1623 return;
1624
032c5e82
TF		 1625rx_failed:
1626 kfree(adapter->tx_scrq);
1627 adapter->tx_scrq = NULL;
1628tx_failed:
1629 for (i = 0; i < registered_queues; i++)
1630 release_sub_crq_queue(adapter, allqueues[i]);
1631 kfree(allqueues);
1632allqueues_failed:
1633 ibmvnic_remove(adapter->vdev);
1634}
1635
1636static int pending_scrq(struct ibmvnic_adapter *adapter,
1637 struct ibmvnic_sub_crq_queue *scrq)
1638{
1639 union sub_crq *entry = &scrq->msgs[scrq->cur];
1640
1641 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1642 return 1;
1643 else
1644 return 0;
1645}
1646
1647static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1648 struct ibmvnic_sub_crq_queue *scrq)
1649{
1650 union sub_crq *entry;
1651 unsigned long flags;
1652
1653 spin_lock_irqsave(&scrq->lock, flags);
1654 entry = &scrq->msgs[scrq->cur];
1655 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1656 if (++scrq->cur == scrq->size)
1657 scrq->cur = 0;
1658 } else {
1659 entry = NULL;
1660 }
1661 spin_unlock_irqrestore(&scrq->lock, flags);
1662
1663 return entry;
1664}
1665
1666static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1667{
1668 struct ibmvnic_crq_queue *queue = &adapter->crq;
1669 union ibmvnic_crq *crq;
1670
1671 crq = &queue->msgs[queue->cur];
1672 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1673 if (++queue->cur == queue->size)
1674 queue->cur = 0;
1675 } else {
1676 crq = NULL;
1677 }
1678
1679 return crq;
1680}
1681
1682static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1683 union sub_crq *sub_crq)
1684{
1685 unsigned int ua = adapter->vdev->unit_address;
1686 struct device *dev = &adapter->vdev->dev;
1687 u64 *u64_crq = (u64 *)sub_crq;
1688 int rc;
1689
1690 netdev_dbg(adapter->netdev,
1691 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1692 (unsigned long int)cpu_to_be64(remote_handle),
1693 (unsigned long int)cpu_to_be64(u64_crq[0]),
1694 (unsigned long int)cpu_to_be64(u64_crq[1]),
1695 (unsigned long int)cpu_to_be64(u64_crq[2]),
1696 (unsigned long int)cpu_to_be64(u64_crq[3]));
1697
1698 /* Make sure the hypervisor sees the complete request */
1699 mb();
1700
1701 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1702 cpu_to_be64(remote_handle),
1703 cpu_to_be64(u64_crq[0]),
1704 cpu_to_be64(u64_crq[1]),
1705 cpu_to_be64(u64_crq[2]),
1706 cpu_to_be64(u64_crq[3]));
1707
1708 if (rc) {
1709 if (rc == H_CLOSED)
1710 dev_warn(dev, "CRQ Queue closed\n");
1711 dev_err(dev, "Send error (rc=%d)\n", rc);
1712 }
1713
1714 return rc;
1715}
1716
ad7775dc
TF		 1717static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1718 u64 remote_handle, u64 ioba, u64 num_entries)
1719{
1720 unsigned int ua = adapter->vdev->unit_address;
1721 struct device *dev = &adapter->vdev->dev;
1722 int rc;
1723
1724 /* Make sure the hypervisor sees the complete request */
1725 mb();
1726 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1727 cpu_to_be64(remote_handle),
1728 ioba, num_entries);
1729
1730 if (rc) {
1731 if (rc == H_CLOSED)
1732 dev_warn(dev, "CRQ Queue closed\n");
1733 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1734 }
1735
1736 return rc;
1737}
1738
032c5e82
TF		 1739static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1740 union ibmvnic_crq *crq)
1741{
1742 unsigned int ua = adapter->vdev->unit_address;
1743 struct device *dev = &adapter->vdev->dev;
1744 u64 *u64_crq = (u64 *)crq;
1745 int rc;
1746
1747 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1748 (unsigned long int)cpu_to_be64(u64_crq[0]),
1749 (unsigned long int)cpu_to_be64(u64_crq[1]));
1750
1751 /* Make sure the hypervisor sees the complete request */
1752 mb();
1753
1754 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1755 cpu_to_be64(u64_crq[0]),
1756 cpu_to_be64(u64_crq[1]));
1757
1758 if (rc) {
1759 if (rc == H_CLOSED)
1760 dev_warn(dev, "CRQ Queue closed\n");
1761 dev_warn(dev, "Send error (rc=%d)\n", rc);
1762 }
1763
1764 return rc;
1765}
1766
1767static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1768{
1769 union ibmvnic_crq crq;
1770
1771 memset(&crq, 0, sizeof(crq));
1772 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1773 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1774 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1775
1776 return ibmvnic_send_crq(adapter, &crq);
1777}
1778
1779static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1780{
1781 union ibmvnic_crq crq;
1782
1783 memset(&crq, 0, sizeof(crq));
1784 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1785 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1786 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1787
1788 return ibmvnic_send_crq(adapter, &crq);
1789}
1790
1791static int send_version_xchg(struct ibmvnic_adapter *adapter)
1792{
1793 union ibmvnic_crq crq;
1794
1795 memset(&crq, 0, sizeof(crq));
1796 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1797 crq.version_exchange.cmd = VERSION_EXCHANGE;
1798 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1799
1800 return ibmvnic_send_crq(adapter, &crq);
1801}
1802
1803static void send_login(struct ibmvnic_adapter *adapter)
1804{
1805 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1806 struct ibmvnic_login_buffer *login_buffer;
1807 struct ibmvnic_inflight_cmd *inflight_cmd;
1808 struct device *dev = &adapter->vdev->dev;
1809 dma_addr_t rsp_buffer_token;
1810 dma_addr_t buffer_token;
1811 size_t rsp_buffer_size;
1812 union ibmvnic_crq crq;
1813 unsigned long flags;
1814 size_t buffer_size;
1815 __be64 *tx_list_p;
1816 __be64 *rx_list_p;
1817 int i;
1818
1819 buffer_size =
1820 sizeof(struct ibmvnic_login_buffer) +
1821 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1822
1823 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1824 if (!login_buffer)
1825 goto buf_alloc_failed;
1826
1827 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1828 DMA_TO_DEVICE);
1829 if (dma_mapping_error(dev, buffer_token)) {
1830 dev_err(dev, "Couldn't map login buffer\n");
1831 goto buf_map_failed;
1832 }
1833
498cd8e4
JA		 1834 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1835 sizeof(u64) * adapter->req_tx_queues +
1836 sizeof(u64) * adapter->req_rx_queues +
1837 sizeof(u64) * adapter->req_rx_queues +
1838 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 1839
1840 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1841 if (!login_rsp_buffer)
1842 goto buf_rsp_alloc_failed;
1843
1844 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1845 rsp_buffer_size, DMA_FROM_DEVICE);
1846 if (dma_mapping_error(dev, rsp_buffer_token)) {
1847 dev_err(dev, "Couldn't map login rsp buffer\n");
1848 goto buf_rsp_map_failed;
1849 }
1850 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1851 if (!inflight_cmd) {
1852 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1853 goto inflight_alloc_failed;
1854 }
1855 adapter->login_buf = login_buffer;
1856 adapter->login_buf_token = buffer_token;
1857 adapter->login_buf_sz = buffer_size;
1858 adapter->login_rsp_buf = login_rsp_buffer;
1859 adapter->login_rsp_buf_token = rsp_buffer_token;
1860 adapter->login_rsp_buf_sz = rsp_buffer_size;
1861
1862 login_buffer->len = cpu_to_be32(buffer_size);
1863 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1864 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1865 login_buffer->off_txcomp_subcrqs =
1866 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1867 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1868 login_buffer->off_rxcomp_subcrqs =
1869 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1870 sizeof(u64) * adapter->req_tx_queues);
1871 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1872 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1873
1874 tx_list_p = (__be64 *)((char *)login_buffer +
1875 sizeof(struct ibmvnic_login_buffer));
1876 rx_list_p = (__be64 *)((char *)login_buffer +
1877 sizeof(struct ibmvnic_login_buffer) +
1878 sizeof(u64) * adapter->req_tx_queues);
1879
1880 for (i = 0; i < adapter->req_tx_queues; i++) {
1881 if (adapter->tx_scrq[i]) {
1882 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1883 crq_num);
1884 }
1885 }
1886
1887 for (i = 0; i < adapter->req_rx_queues; i++) {
1888 if (adapter->rx_scrq[i]) {
1889 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1890 crq_num);
1891 }
1892 }
1893
1894 netdev_dbg(adapter->netdev, "Login Buffer:\n");
1895 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1896 netdev_dbg(adapter->netdev, "%016lx\n",
1897 ((unsigned long int *)(adapter->login_buf))[i]);
1898 }
1899
1900 memset(&crq, 0, sizeof(crq));
1901 crq.login.first = IBMVNIC_CRQ_CMD;
1902 crq.login.cmd = LOGIN;
1903 crq.login.ioba = cpu_to_be32(buffer_token);
1904 crq.login.len = cpu_to_be32(buffer_size);
1905
1906 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1907
1908 spin_lock_irqsave(&adapter->inflight_lock, flags);
1909 list_add_tail(&inflight_cmd->list, &adapter->inflight);
1910 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1911
1912 ibmvnic_send_crq(adapter, &crq);
1913
1914 return;
1915
1916inflight_alloc_failed:
1917 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1918 DMA_FROM_DEVICE);
1919buf_rsp_map_failed:
1920 kfree(login_rsp_buffer);
1921buf_rsp_alloc_failed:
1922 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1923buf_map_failed:
1924 kfree(login_buffer);
1925buf_alloc_failed:
1926 return;
1927}
1928
1929static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1930 u32 len, u8 map_id)
1931{
1932 union ibmvnic_crq crq;
1933
1934 memset(&crq, 0, sizeof(crq));
1935 crq.request_map.first = IBMVNIC_CRQ_CMD;
1936 crq.request_map.cmd = REQUEST_MAP;
1937 crq.request_map.map_id = map_id;
1938 crq.request_map.ioba = cpu_to_be32(addr);
1939 crq.request_map.len = cpu_to_be32(len);
1940 ibmvnic_send_crq(adapter, &crq);
1941}
1942
1943static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1944{
1945 union ibmvnic_crq crq;
1946
1947 memset(&crq, 0, sizeof(crq));
1948 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1949 crq.request_unmap.cmd = REQUEST_UNMAP;
1950 crq.request_unmap.map_id = map_id;
1951 ibmvnic_send_crq(adapter, &crq);
1952}
1953
1954static void send_map_query(struct ibmvnic_adapter *adapter)
1955{
1956 union ibmvnic_crq crq;
1957
1958 memset(&crq, 0, sizeof(crq));
1959 crq.query_map.first = IBMVNIC_CRQ_CMD;
1960 crq.query_map.cmd = QUERY_MAP;
1961 ibmvnic_send_crq(adapter, &crq);
1962}
1963
1964/* Send a series of CRQs requesting various capabilities of the VNIC server */
1965static void send_cap_queries(struct ibmvnic_adapter *adapter)
1966{
1967 union ibmvnic_crq crq;
1968
1969 atomic_set(&adapter->running_cap_queries, 0);
1970 memset(&crq, 0, sizeof(crq));
1971 crq.query_capability.first = IBMVNIC_CRQ_CMD;
1972 crq.query_capability.cmd = QUERY_CAPABILITY;
1973
1974 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1975 atomic_inc(&adapter->running_cap_queries);
1976 ibmvnic_send_crq(adapter, &crq);
1977
1978 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1979 atomic_inc(&adapter->running_cap_queries);
1980 ibmvnic_send_crq(adapter, &crq);
1981
1982 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1983 atomic_inc(&adapter->running_cap_queries);
1984 ibmvnic_send_crq(adapter, &crq);
1985
1986 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1987 atomic_inc(&adapter->running_cap_queries);
1988 ibmvnic_send_crq(adapter, &crq);
1989
1990 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1991 atomic_inc(&adapter->running_cap_queries);
1992 ibmvnic_send_crq(adapter, &crq);
1993
1994 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1995 atomic_inc(&adapter->running_cap_queries);
1996 ibmvnic_send_crq(adapter, &crq);
1997
1998 crq.query_capability.capability =
1999 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2000 atomic_inc(&adapter->running_cap_queries);
2001 ibmvnic_send_crq(adapter, &crq);
2002
2003 crq.query_capability.capability =
2004 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2005 atomic_inc(&adapter->running_cap_queries);
2006 ibmvnic_send_crq(adapter, &crq);
2007
2008 crq.query_capability.capability =
2009 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2010 atomic_inc(&adapter->running_cap_queries);
2011 ibmvnic_send_crq(adapter, &crq);
2012
2013 crq.query_capability.capability =
2014 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2015 atomic_inc(&adapter->running_cap_queries);
2016 ibmvnic_send_crq(adapter, &crq);
2017
2018 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2019 atomic_inc(&adapter->running_cap_queries);
2020 ibmvnic_send_crq(adapter, &crq);
2021
2022 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2023 atomic_inc(&adapter->running_cap_queries);
2024 ibmvnic_send_crq(adapter, &crq);
2025
2026 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2027 atomic_inc(&adapter->running_cap_queries);
2028 ibmvnic_send_crq(adapter, &crq);
2029
2030 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2031 atomic_inc(&adapter->running_cap_queries);
2032 ibmvnic_send_crq(adapter, &crq);
2033
2034 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2035 atomic_inc(&adapter->running_cap_queries);
2036 ibmvnic_send_crq(adapter, &crq);
2037
2038 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2039 atomic_inc(&adapter->running_cap_queries);
2040 ibmvnic_send_crq(adapter, &crq);
2041
2042 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2043 atomic_inc(&adapter->running_cap_queries);
2044 ibmvnic_send_crq(adapter, &crq);
2045
2046 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2047 atomic_inc(&adapter->running_cap_queries);
2048 ibmvnic_send_crq(adapter, &crq);
2049
2050 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2051 atomic_inc(&adapter->running_cap_queries);
2052 ibmvnic_send_crq(adapter, &crq);
2053
2054 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2055 atomic_inc(&adapter->running_cap_queries);
2056 ibmvnic_send_crq(adapter, &crq);
2057
2058 crq.query_capability.capability =
2059 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2060 atomic_inc(&adapter->running_cap_queries);
2061 ibmvnic_send_crq(adapter, &crq);
2062
2063 crq.query_capability.capability =
2064 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2065 atomic_inc(&adapter->running_cap_queries);
2066 ibmvnic_send_crq(adapter, &crq);
2067
2068 crq.query_capability.capability =
2069 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2070 atomic_inc(&adapter->running_cap_queries);
2071 ibmvnic_send_crq(adapter, &crq);
2072
2073 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2074 atomic_inc(&adapter->running_cap_queries);
2075 ibmvnic_send_crq(adapter, &crq);
2076}
2077
2078static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2079{
2080 struct device *dev = &adapter->vdev->dev;
2081 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2082 union ibmvnic_crq crq;
2083 int i;
2084
2085 dma_unmap_single(dev, adapter->ip_offload_tok,
2086 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2087
2088 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2089 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2090 netdev_dbg(adapter->netdev, "%016lx\n",
2091 ((unsigned long int *)(buf))[i]);
2092
2093 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2094 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2095 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2096 buf->tcp_ipv4_chksum);
2097 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2098 buf->tcp_ipv6_chksum);
2099 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2100 buf->udp_ipv4_chksum);
2101 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2102 buf->udp_ipv6_chksum);
2103 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2104 buf->large_tx_ipv4);
2105 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2106 buf->large_tx_ipv6);
2107 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2108 buf->large_rx_ipv4);
2109 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2110 buf->large_rx_ipv6);
2111 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2112 buf->max_ipv4_header_size);
2113 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2114 buf->max_ipv6_header_size);
2115 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2116 buf->max_tcp_header_size);
2117 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2118 buf->max_udp_header_size);
2119 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2120 buf->max_large_tx_size);
2121 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2122 buf->max_large_rx_size);
2123 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2124 buf->ipv6_extension_header);
2125 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2126 buf->tcp_pseudosum_req);
2127 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2128 buf->num_ipv6_ext_headers);
2129 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2130 buf->off_ipv6_ext_headers);
2131
2132 adapter->ip_offload_ctrl_tok =
2133 dma_map_single(dev, &adapter->ip_offload_ctrl,
2134 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2135
2136 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2137 dev_err(dev, "Couldn't map ip offload control buffer\n");
2138 return;
2139 }
2140
2141 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2142 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2143 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2144 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2145 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2146
2147 /* large_tx/rx disabled for now, additional features needed */
2148 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2149 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2150 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2151 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2152
2153 adapter->netdev->features = NETIF_F_GSO;
2154
2155 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2156 adapter->netdev->features |= NETIF_F_IP_CSUM;
2157
2158 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2159 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2160
9be02cdf
TF		 2161 if ((adapter->netdev->features &
2162 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2163 adapter->netdev->features |= NETIF_F_RXCSUM;
2164
032c5e82
TF		 2165 memset(&crq, 0, sizeof(crq));
2166 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2167 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2168 crq.control_ip_offload.len =
2169 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2170 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2171 ibmvnic_send_crq(adapter, &crq);
2172}
2173
2174static void handle_error_info_rsp(union ibmvnic_crq *crq,
2175 struct ibmvnic_adapter *adapter)
2176{
2177 struct device *dev = &adapter->vdev->dev;
96183182 2178 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2179 unsigned long flags;
2180 bool found = false;
2181 int i;
2182
2183 if (!crq->request_error_rsp.rc.code) {
2184 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2185 crq->request_error_rsp.rc.code);
2186 return;
2187 }
2188
2189 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2190 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2191 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2192 found = true;
2193 list_del(&error_buff->list);
2194 break;
2195 }
2196 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2197
2198 if (!found) {
2199 dev_err(dev, "Couldn't find error id %x\n",
2200 crq->request_error_rsp.error_id);
2201 return;
2202 }
2203
2204 dev_err(dev, "Detailed info for error id %x:",
2205 crq->request_error_rsp.error_id);
2206
2207 for (i = 0; i < error_buff->len; i++) {
2208 pr_cont("%02x", (int)error_buff->buff[i]);
2209 if (i % 8 == 7)
2210 pr_cont(" ");
2211 }
2212 pr_cont("\n");
2213
2214 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2215 DMA_FROM_DEVICE);
2216 kfree(error_buff->buff);
2217 kfree(error_buff);
2218}
2219
2220static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2221 struct ibmvnic_adapter *adapter)
2222{
2223 int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2224 struct ibmvnic_inflight_cmd *inflight_cmd;
2225 struct device *dev = &adapter->vdev->dev;
2226 union ibmvnic_crq newcrq;
2227 unsigned long flags;
2228
2229 /* allocate and map buffer */
2230 adapter->dump_data = kmalloc(len, GFP_KERNEL);
2231 if (!adapter->dump_data) {
2232 complete(&adapter->fw_done);
2233 return;
2234 }
2235
2236 adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2237 DMA_FROM_DEVICE);
2238
2239 if (dma_mapping_error(dev, adapter->dump_data_token)) {
2240 if (!firmware_has_feature(FW_FEATURE_CMO))
2241 dev_err(dev, "Couldn't map dump data\n");
2242 kfree(adapter->dump_data);
2243 complete(&adapter->fw_done);
2244 return;
2245 }
2246
2247 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2248 if (!inflight_cmd) {
2249 dma_unmap_single(dev, adapter->dump_data_token, len,
2250 DMA_FROM_DEVICE);
2251 kfree(adapter->dump_data);
2252 complete(&adapter->fw_done);
2253 return;
2254 }
2255
2256 memset(&newcrq, 0, sizeof(newcrq));
2257 newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2258 newcrq.request_dump.cmd = REQUEST_DUMP;
2259 newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2260 newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2261
2262 memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2263
2264 spin_lock_irqsave(&adapter->inflight_lock, flags);
2265 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2266 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2267
2268 ibmvnic_send_crq(adapter, &newcrq);
2269}
2270
2271static void handle_error_indication(union ibmvnic_crq *crq,
2272 struct ibmvnic_adapter *adapter)
2273{
2274 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2275 struct ibmvnic_inflight_cmd *inflight_cmd;
2276 struct device *dev = &adapter->vdev->dev;
2277 struct ibmvnic_error_buff *error_buff;
2278 union ibmvnic_crq new_crq;
2279 unsigned long flags;
2280
2281 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2282 crq->error_indication.
2283 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2284 crq->error_indication.error_id,
2285 crq->error_indication.error_cause);
2286
2287 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2288 if (!error_buff)
2289 return;
2290
2291 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2292 if (!error_buff->buff) {
2293 kfree(error_buff);
2294 return;
2295 }
2296
2297 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2298 DMA_FROM_DEVICE);
2299 if (dma_mapping_error(dev, error_buff->dma)) {
2300 if (!firmware_has_feature(FW_FEATURE_CMO))
2301 dev_err(dev, "Couldn't map error buffer\n");
2302 kfree(error_buff->buff);
2303 kfree(error_buff);
2304 return;
2305 }
2306
2307 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2308 if (!inflight_cmd) {
2309 dma_unmap_single(dev, error_buff->dma, detail_len,
2310 DMA_FROM_DEVICE);
2311 kfree(error_buff->buff);
2312 kfree(error_buff);
2313 return;
2314 }
2315
2316 error_buff->len = detail_len;
2317 error_buff->error_id = crq->error_indication.error_id;
2318
2319 spin_lock_irqsave(&adapter->error_list_lock, flags);
2320 list_add_tail(&error_buff->list, &adapter->errors);
2321 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2322
2323 memset(&new_crq, 0, sizeof(new_crq));
2324 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2325 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2326 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2327 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2328 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2329
2330 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2331
2332 spin_lock_irqsave(&adapter->inflight_lock, flags);
2333 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2334 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2335
2336 ibmvnic_send_crq(adapter, &new_crq);
2337}
2338
2339static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2340 struct ibmvnic_adapter *adapter)
2341{
2342 struct net_device *netdev = adapter->netdev;
2343 struct device *dev = &adapter->vdev->dev;
2344 long rc;
2345
2346 rc = crq->change_mac_addr_rsp.rc.code;
2347 if (rc) {
2348 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2349 return;
2350 }
2351 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2352 ETH_ALEN);
2353}
2354
2355static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2356 struct ibmvnic_adapter *adapter)
2357{
2358 struct device *dev = &adapter->vdev->dev;
2359 u64 *req_value;
2360 char *name;
2361
2362 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2363 case REQ_TX_QUEUES:
2364 req_value = &adapter->req_tx_queues;
2365 name = "tx";
2366 break;
2367 case REQ_RX_QUEUES:
2368 req_value = &adapter->req_rx_queues;
2369 name = "rx";
2370 break;
2371 case REQ_RX_ADD_QUEUES:
2372 req_value = &adapter->req_rx_add_queues;
2373 name = "rx_add";
2374 break;
2375 case REQ_TX_ENTRIES_PER_SUBCRQ:
2376 req_value = &adapter->req_tx_entries_per_subcrq;
2377 name = "tx_entries_per_subcrq";
2378 break;
2379 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2380 req_value = &adapter->req_rx_add_entries_per_subcrq;
2381 name = "rx_add_entries_per_subcrq";
2382 break;
2383 case REQ_MTU:
2384 req_value = &adapter->req_mtu;
2385 name = "mtu";
2386 break;
2387 case PROMISC_REQUESTED:
2388 req_value = &adapter->promisc;
2389 name = "promisc";
2390 break;
2391 default:
2392 dev_err(dev, "Got invalid cap request rsp %d\n",
2393 crq->request_capability.capability);
2394 return;
2395 }
2396
2397 switch (crq->request_capability_rsp.rc.code) {
2398 case SUCCESS:
2399 break;
2400 case PARTIALSUCCESS:
2401 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2402 *req_value,
2403 (long int)be32_to_cpu(crq->request_capability_rsp.
2404 number), name);
ea22d51a 2405 release_sub_crqs_no_irqs(adapter);
032c5e82 2406 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
ea22d51a 2407 init_sub_crqs(adapter, 1);
032c5e82
TF		 2408 return;
2409 default:
2410 dev_err(dev, "Error %d in request cap rsp\n",
2411 crq->request_capability_rsp.rc.code);
2412 return;
2413 }
2414
2415 /* Done receiving requested capabilities, query IP offload support */
2416 if (++adapter->requested_caps == 7) {
2417 union ibmvnic_crq newcrq;
2418 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2419 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2420 &adapter->ip_offload_buf;
2421
2422 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2423 buf_sz,
2424 DMA_FROM_DEVICE);
2425
2426 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2427 if (!firmware_has_feature(FW_FEATURE_CMO))
2428 dev_err(dev, "Couldn't map offload buffer\n");
2429 return;
2430 }
2431
2432 memset(&newcrq, 0, sizeof(newcrq));
2433 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2434 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2435 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2436 newcrq.query_ip_offload.ioba =
2437 cpu_to_be32(adapter->ip_offload_tok);
2438
2439 ibmvnic_send_crq(adapter, &newcrq);
2440 }
2441}
2442
2443static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2444 struct ibmvnic_adapter *adapter)
2445{
2446 struct device *dev = &adapter->vdev->dev;
2447 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2448 struct ibmvnic_login_buffer *login = adapter->login_buf;
2449 union ibmvnic_crq crq;
2450 int i;
2451
2452 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2453 DMA_BIDIRECTIONAL);
2454 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2455 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2456
498cd8e4
JA		 2457 /* If the number of queues requested can't be allocated by the
2458 * server, the login response will return with code 1. We will need
2459 * to resend the login buffer with fewer queues requested.
2460 */
2461 if (login_rsp_crq->generic.rc.code) {
2462 adapter->renegotiate = true;
2463 complete(&adapter->init_done);
2464 return 0;
2465 }
2466
032c5e82
TF		 2467 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2468 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2469 netdev_dbg(adapter->netdev, "%016lx\n",
2470 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2471 }
2472
2473 /* Sanity checks */
2474 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2475 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2476 adapter->req_rx_add_queues !=
2477 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2478 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2479 ibmvnic_remove(adapter->vdev);
2480 return -EIO;
2481 }
2482 complete(&adapter->init_done);
2483
2484 memset(&crq, 0, sizeof(crq));
2485 crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2486 crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2487 ibmvnic_send_crq(adapter, &crq);
2488
2489 return 0;
2490}
2491
2492static void handle_request_map_rsp(union ibmvnic_crq *crq,
2493 struct ibmvnic_adapter *adapter)
2494{
2495 struct device *dev = &adapter->vdev->dev;
2496 u8 map_id = crq->request_map_rsp.map_id;
2497 int tx_subcrqs;
2498 int rx_subcrqs;
2499 long rc;
2500 int i;
2501
2502 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2503 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2504
2505 rc = crq->request_map_rsp.rc.code;
2506 if (rc) {
2507 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2508 adapter->map_id--;
2509 /* need to find and zero tx/rx_pool map_id */
2510 for (i = 0; i < tx_subcrqs; i++) {
2511 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2512 adapter->tx_pool[i].long_term_buff.map_id = 0;
2513 }
2514 for (i = 0; i < rx_subcrqs; i++) {
2515 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2516 adapter->rx_pool[i].long_term_buff.map_id = 0;
2517 }
2518 }
2519 complete(&adapter->fw_done);
2520}
2521
2522static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2523 struct ibmvnic_adapter *adapter)
2524{
2525 struct device *dev = &adapter->vdev->dev;
2526 long rc;
2527
2528 rc = crq->request_unmap_rsp.rc.code;
2529 if (rc)
2530 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2531}
2532
2533static void handle_query_map_rsp(union ibmvnic_crq *crq,
2534 struct ibmvnic_adapter *adapter)
2535{
2536 struct net_device *netdev = adapter->netdev;
2537 struct device *dev = &adapter->vdev->dev;
2538 long rc;
2539
2540 rc = crq->query_map_rsp.rc.code;
2541 if (rc) {
2542 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2543 return;
2544 }
2545 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2546 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2547 crq->query_map_rsp.free_pages);
2548}
2549
2550static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2551 struct ibmvnic_adapter *adapter)
2552{
2553 struct net_device *netdev = adapter->netdev;
2554 struct device *dev = &adapter->vdev->dev;
2555 long rc;
2556
2557 atomic_dec(&adapter->running_cap_queries);
2558 netdev_dbg(netdev, "Outstanding queries: %d\n",
2559 atomic_read(&adapter->running_cap_queries));
2560 rc = crq->query_capability.rc.code;
2561 if (rc) {
2562 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2563 goto out;
2564 }
2565
2566 switch (be16_to_cpu(crq->query_capability.capability)) {
2567 case MIN_TX_QUEUES:
2568 adapter->min_tx_queues =
de89e854 2569 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2570 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2571 adapter->min_tx_queues);
2572 break;
2573 case MIN_RX_QUEUES:
2574 adapter->min_rx_queues =
de89e854 2575 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2576 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2577 adapter->min_rx_queues);
2578 break;
2579 case MIN_RX_ADD_QUEUES:
2580 adapter->min_rx_add_queues =
de89e854 2581 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2582 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2583 adapter->min_rx_add_queues);
2584 break;
2585 case MAX_TX_QUEUES:
2586 adapter->max_tx_queues =
de89e854 2587 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2588 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2589 adapter->max_tx_queues);
2590 break;
2591 case MAX_RX_QUEUES:
2592 adapter->max_rx_queues =
de89e854 2593 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2594 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2595 adapter->max_rx_queues);
2596 break;
2597 case MAX_RX_ADD_QUEUES:
2598 adapter->max_rx_add_queues =
de89e854 2599 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2600 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2601 adapter->max_rx_add_queues);
2602 break;
2603 case MIN_TX_ENTRIES_PER_SUBCRQ:
2604 adapter->min_tx_entries_per_subcrq =
de89e854 2605 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2606 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2607 adapter->min_tx_entries_per_subcrq);
2608 break;
2609 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2610 adapter->min_rx_add_entries_per_subcrq =
de89e854 2611 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2612 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2613 adapter->min_rx_add_entries_per_subcrq);
2614 break;
2615 case MAX_TX_ENTRIES_PER_SUBCRQ:
2616 adapter->max_tx_entries_per_subcrq =
de89e854 2617 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2618 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2619 adapter->max_tx_entries_per_subcrq);
2620 break;
2621 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2622 adapter->max_rx_add_entries_per_subcrq =
de89e854 2623 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2624 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2625 adapter->max_rx_add_entries_per_subcrq);
2626 break;
2627 case TCP_IP_OFFLOAD:
2628 adapter->tcp_ip_offload =
de89e854 2629 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2630 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2631 adapter->tcp_ip_offload);
2632 break;
2633 case PROMISC_SUPPORTED:
2634 adapter->promisc_supported =
de89e854 2635 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2636 netdev_dbg(netdev, "promisc_supported = %lld\n",
2637 adapter->promisc_supported);
2638 break;
2639 case MIN_MTU:
de89e854 2640 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2641 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2642 break;
2643 case MAX_MTU:
de89e854 2644 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2645 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2646 break;
2647 case MAX_MULTICAST_FILTERS:
2648 adapter->max_multicast_filters =
de89e854 2649 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2650 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2651 adapter->max_multicast_filters);
2652 break;
2653 case VLAN_HEADER_INSERTION:
2654 adapter->vlan_header_insertion =
de89e854 2655 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2656 if (adapter->vlan_header_insertion)
2657 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2658 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2659 adapter->vlan_header_insertion);
2660 break;
2661 case MAX_TX_SG_ENTRIES:
2662 adapter->max_tx_sg_entries =
de89e854 2663 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2664 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2665 adapter->max_tx_sg_entries);
2666 break;
2667 case RX_SG_SUPPORTED:
2668 adapter->rx_sg_supported =
de89e854 2669 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2670 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2671 adapter->rx_sg_supported);
2672 break;
2673 case OPT_TX_COMP_SUB_QUEUES:
2674 adapter->opt_tx_comp_sub_queues =
de89e854 2675 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2676 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2677 adapter->opt_tx_comp_sub_queues);
2678 break;
2679 case OPT_RX_COMP_QUEUES:
2680 adapter->opt_rx_comp_queues =
de89e854 2681 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2682 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2683 adapter->opt_rx_comp_queues);
2684 break;
2685 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2686 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 2687 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2688 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2689 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2690 break;
2691 case OPT_TX_ENTRIES_PER_SUBCRQ:
2692 adapter->opt_tx_entries_per_subcrq =
de89e854 2693 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2694 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2695 adapter->opt_tx_entries_per_subcrq);
2696 break;
2697 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2698 adapter->opt_rxba_entries_per_subcrq =
de89e854 2699 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2700 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2701 adapter->opt_rxba_entries_per_subcrq);
2702 break;
2703 case TX_RX_DESC_REQ:
2704 adapter->tx_rx_desc_req = crq->query_capability.number;
2705 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2706 adapter->tx_rx_desc_req);
2707 break;
2708
2709 default:
2710 netdev_err(netdev, "Got invalid cap rsp %d\n",
2711 crq->query_capability.capability);
2712 }
2713
2714out:
2715 if (atomic_read(&adapter->running_cap_queries) == 0)
ea22d51a 2716 init_sub_crqs(adapter, 0);
032c5e82
TF		 2717 /* We're done querying the capabilities, initialize sub-crqs */
2718}
2719
2720static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2721 struct ibmvnic_adapter *adapter)
2722{
2723 u8 correlator = crq->control_ras_rsp.correlator;
2724 struct device *dev = &adapter->vdev->dev;
2725 bool found = false;
2726 int i;
2727
2728 if (crq->control_ras_rsp.rc.code) {
2729 dev_warn(dev, "Control ras failed rc=%d\n",
2730 crq->control_ras_rsp.rc.code);
2731 return;
2732 }
2733
2734 for (i = 0; i < adapter->ras_comp_num; i++) {
2735 if (adapter->ras_comps[i].correlator == correlator) {
2736 found = true;
2737 break;
2738 }
2739 }
2740
2741 if (!found) {
2742 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2743 return;
2744 }
2745
2746 switch (crq->control_ras_rsp.op) {
2747 case IBMVNIC_TRACE_LEVEL:
2748 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2749 break;
2750 case IBMVNIC_ERROR_LEVEL:
2751 adapter->ras_comps[i].error_check_level =
2752 crq->control_ras.level;
2753 break;
2754 case IBMVNIC_TRACE_PAUSE:
2755 adapter->ras_comp_int[i].paused = 1;
2756 break;
2757 case IBMVNIC_TRACE_RESUME:
2758 adapter->ras_comp_int[i].paused = 0;
2759 break;
2760 case IBMVNIC_TRACE_ON:
2761 adapter->ras_comps[i].trace_on = 1;
2762 break;
2763 case IBMVNIC_TRACE_OFF:
2764 adapter->ras_comps[i].trace_on = 0;
2765 break;
2766 case IBMVNIC_CHG_TRACE_BUFF_SZ:
2767 /* trace_buff_sz is 3 bytes, stuff it into an int */
2768 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2769 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2770 crq->control_ras_rsp.trace_buff_sz[0];
2771 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2772 crq->control_ras_rsp.trace_buff_sz[1];
2773 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2774 crq->control_ras_rsp.trace_buff_sz[2];
2775 break;
2776 default:
2777 dev_err(dev, "invalid op %d on control_ras_rsp",
2778 crq->control_ras_rsp.op);
2779 }
2780}
2781
032c5e82
TF		 2782static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2783 loff_t *ppos)
2784{
2785 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2786 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2787 struct device *dev = &adapter->vdev->dev;
2788 struct ibmvnic_fw_trace_entry *trace;
2789 int num = ras_comp_int->num;
2790 union ibmvnic_crq crq;
2791 dma_addr_t trace_tok;
2792
2793 if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2794 return 0;
2795
2796 trace =
2797 dma_alloc_coherent(dev,
2798 be32_to_cpu(adapter->ras_comps[num].
2799 trace_buff_size), &trace_tok,
2800 GFP_KERNEL);
2801 if (!trace) {
2802 dev_err(dev, "Couldn't alloc trace buffer\n");
2803 return 0;
2804 }
2805
2806 memset(&crq, 0, sizeof(crq));
2807 crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2808 crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2809 crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2810 crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2811 crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2812 ibmvnic_send_crq(adapter, &crq);
2813
2814 init_completion(&adapter->fw_done);
2815 wait_for_completion(&adapter->fw_done);
2816
2817 if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2818 len =
2819 be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2820 *ppos;
2821
2822 copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2823
2824 dma_free_coherent(dev,
2825 be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2826 trace, trace_tok);
2827 *ppos += len;
2828 return len;
2829}
2830
2831static const struct file_operations trace_ops = {
2832 .owner = THIS_MODULE,
7a95e94c 2833 .open = simple_open,
032c5e82
TF		 2834 .read = trace_read,
2835};
2836
2837static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2838 loff_t *ppos)
2839{
2840 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2841 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2842 int num = ras_comp_int->num;
2843 char buff[5]; /* 1 or 0 plus \n and \0 */
2844 int size;
2845
2846 size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2847
2848 if (*ppos >= size)
2849 return 0;
2850
2851 copy_to_user(user_buf, buff, size);
2852 *ppos += size;
2853 return size;
2854}
2855
2856static ssize_t paused_write(struct file *file, const char __user *user_buf,
2857 size_t len, loff_t *ppos)
2858{
2859 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2860 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2861 int num = ras_comp_int->num;
2862 union ibmvnic_crq crq;
2863 unsigned long val;
2864 char buff[9]; /* decimal max int plus \n and \0 */
2865
2866 copy_from_user(buff, user_buf, sizeof(buff));
2867 val = kstrtoul(buff, 10, NULL);
2868
2869 adapter->ras_comp_int[num].paused = val ? 1 : 0;
2870
2871 memset(&crq, 0, sizeof(crq));
2872 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2873 crq.control_ras.cmd = CONTROL_RAS;
2874 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2875 crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2876 ibmvnic_send_crq(adapter, &crq);
2877
2878 return len;
2879}
2880
2881static const struct file_operations paused_ops = {
2882 .owner = THIS_MODULE,
7a95e94c 2883 .open = simple_open,
032c5e82
TF		 2884 .read = paused_read,
2885 .write = paused_write,
2886};
2887
2888static ssize_t tracing_read(struct file *file, char __user *user_buf,
2889 size_t len, loff_t *ppos)
2890{
2891 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2892 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2893 int num = ras_comp_int->num;
2894 char buff[5]; /* 1 or 0 plus \n and \0 */
2895 int size;
2896
2897 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2898
2899 if (*ppos >= size)
2900 return 0;
2901
2902 copy_to_user(user_buf, buff, size);
2903 *ppos += size;
2904 return size;
2905}
2906
2907static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2908 size_t len, loff_t *ppos)
2909{
2910 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2911 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2912 int num = ras_comp_int->num;
2913 union ibmvnic_crq crq;
2914 unsigned long val;
2915 char buff[9]; /* decimal max int plus \n and \0 */
2916
2917 copy_from_user(buff, user_buf, sizeof(buff));
2918 val = kstrtoul(buff, 10, NULL);
2919
2920 memset(&crq, 0, sizeof(crq));
2921 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2922 crq.control_ras.cmd = CONTROL_RAS;
2923 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2924 crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2925
2926 return len;
2927}
2928
2929static const struct file_operations tracing_ops = {
2930 .owner = THIS_MODULE,
7a95e94c 2931 .open = simple_open,
032c5e82
TF		 2932 .read = tracing_read,
2933 .write = tracing_write,
2934};
2935
2936static ssize_t error_level_read(struct file *file, char __user *user_buf,
2937 size_t len, loff_t *ppos)
2938{
2939 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2940 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2941 int num = ras_comp_int->num;
2942 char buff[5]; /* decimal max char plus \n and \0 */
2943 int size;
2944
2945 size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2946
2947 if (*ppos >= size)
2948 return 0;
2949
2950 copy_to_user(user_buf, buff, size);
2951 *ppos += size;
2952 return size;
2953}
2954
2955static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2956 size_t len, loff_t *ppos)
2957{
2958 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2959 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2960 int num = ras_comp_int->num;
2961 union ibmvnic_crq crq;
2962 unsigned long val;
2963 char buff[9]; /* decimal max int plus \n and \0 */
2964
2965 copy_from_user(buff, user_buf, sizeof(buff));
2966 val = kstrtoul(buff, 10, NULL);
2967
2968 if (val > 9)
2969 val = 9;
2970
2971 memset(&crq, 0, sizeof(crq));
2972 crq.control_ras.first = IBMVNIC_CRQ_CMD;
2973 crq.control_ras.cmd = CONTROL_RAS;
2974 crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2975 crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2976 crq.control_ras.level = val;
2977 ibmvnic_send_crq(adapter, &crq);
2978
2979 return len;
2980}
2981
2982static const struct file_operations error_level_ops = {
2983 .owner = THIS_MODULE,
7a95e94c 2984 .open = simple_open,
032c5e82
TF		 2985 .read = error_level_read,
2986 .write = error_level_write,
2987};
2988
2989static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2990 size_t len, loff_t *ppos)
2991{
2992 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2993 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2994 int num = ras_comp_int->num;
2995 char buff[5]; /* decimal max char plus \n and \0 */
2996 int size;
2997
2998 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2999 if (*ppos >= size)
3000 return 0;
3001
3002 copy_to_user(user_buf, buff, size);
3003 *ppos += size;
3004 return size;
3005}
3006
3007static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3008 size_t len, loff_t *ppos)
3009{
3010 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3011 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3012 union ibmvnic_crq crq;
3013 unsigned long val;
3014 char buff[9]; /* decimal max int plus \n and \0 */
3015
3016 copy_from_user(buff, user_buf, sizeof(buff));
3017 val = kstrtoul(buff, 10, NULL);
3018 if (val > 9)
3019 val = 9;
3020
3021 memset(&crq, 0, sizeof(crq));
3022 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3023 crq.control_ras.cmd = CONTROL_RAS;
3024 crq.control_ras.correlator =
3025 adapter->ras_comps[ras_comp_int->num].correlator;
3026 crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3027 crq.control_ras.level = val;
3028 ibmvnic_send_crq(adapter, &crq);
3029
3030 return len;
3031}
3032
3033static const struct file_operations trace_level_ops = {
3034 .owner = THIS_MODULE,
7a95e94c 3035 .open = simple_open,
032c5e82
TF		 3036 .read = trace_level_read,
3037 .write = trace_level_write,
3038};
3039
3040static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3041 size_t len, loff_t *ppos)
3042{
3043 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3044 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3045 int num = ras_comp_int->num;
3046 char buff[9]; /* decimal max int plus \n and \0 */
3047 int size;
3048
3049 size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3050 if (*ppos >= size)
3051 return 0;
3052
3053 copy_to_user(user_buf, buff, size);
3054 *ppos += size;
3055 return size;
3056}
3057
3058static ssize_t trace_buff_size_write(struct file *file,
3059 const char __user *user_buf, size_t len,
3060 loff_t *ppos)
3061{
3062 struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3063 struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3064 union ibmvnic_crq crq;
3065 unsigned long val;
3066 char buff[9]; /* decimal max int plus \n and \0 */
3067
3068 copy_from_user(buff, user_buf, sizeof(buff));
3069 val = kstrtoul(buff, 10, NULL);
3070
3071 memset(&crq, 0, sizeof(crq));
3072 crq.control_ras.first = IBMVNIC_CRQ_CMD;
3073 crq.control_ras.cmd = CONTROL_RAS;
3074 crq.control_ras.correlator =
3075 adapter->ras_comps[ras_comp_int->num].correlator;
3076 crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3077 /* trace_buff_sz is 3 bytes, stuff an int into it */
3078 crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3079 crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3080 crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3081 ibmvnic_send_crq(adapter, &crq);
3082
3083 return len;
3084}
3085
3086static const struct file_operations trace_size_ops = {
3087 .owner = THIS_MODULE,
7a95e94c 3088 .open = simple_open,
032c5e82
TF		 3089 .read = trace_buff_size_read,
3090 .write = trace_buff_size_write,
3091};
3092
3093static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3094 struct ibmvnic_adapter *adapter)
3095{
3096 struct device *dev = &adapter->vdev->dev;
3097 struct dentry *dir_ent;
3098 struct dentry *ent;
3099 int i;
3100
3101 debugfs_remove_recursive(adapter->ras_comps_ent);
3102
3103 adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3104 adapter->debugfs_dir);
3105 if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3106 dev_info(dev, "debugfs create ras_comps dir failed\n");
3107 return;
3108 }
3109
3110 for (i = 0; i < adapter->ras_comp_num; i++) {
3111 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3112 adapter->ras_comps_ent);
3113 if (!dir_ent || IS_ERR(dir_ent)) {
3114 dev_info(dev, "debugfs create %s dir failed\n",
3115 adapter->ras_comps[i].name);
3116 continue;
3117 }
3118
3119 adapter->ras_comp_int[i].adapter = adapter;
3120 adapter->ras_comp_int[i].num = i;
3121 adapter->ras_comp_int[i].desc_blob.data =
3122 &adapter->ras_comps[i].description;
3123 adapter->ras_comp_int[i].desc_blob.size =
3124 sizeof(adapter->ras_comps[i].description);
3125
3126 /* Don't need to remember the dentry's because the debugfs dir
3127 * gets removed recursively
3128 */
3129 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3130 &adapter->ras_comp_int[i].desc_blob);
3131 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3132 dir_ent, &adapter->ras_comp_int[i],
3133 &trace_size_ops);
3134 ent = debugfs_create_file("trace_level",
3135 S_IRUGO |
3136 (adapter->ras_comps[i].trace_level !=
3137 0xFF ? S_IWUSR : 0),
3138 dir_ent, &adapter->ras_comp_int[i],
3139 &trace_level_ops);
3140 ent = debugfs_create_file("error_level",
3141 S_IRUGO |
3142 (adapter->
3143 ras_comps[i].error_check_level !=
3144 0xFF ? S_IWUSR : 0),
3145 dir_ent, &adapter->ras_comp_int[i],
3146 &trace_level_ops);
3147 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3148 dir_ent, &adapter->ras_comp_int[i],
3149 &tracing_ops);
3150 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3151 dir_ent, &adapter->ras_comp_int[i],
3152 &paused_ops);
3153 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3154 &adapter->ras_comp_int[i],
3155 &trace_ops);
3156 }
3157}
3158
3159static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3160 struct ibmvnic_adapter *adapter)
3161{
3162 int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3163 struct device *dev = &adapter->vdev->dev;
3164 union ibmvnic_crq newcrq;
3165
3166 adapter->ras_comps = dma_alloc_coherent(dev, len,
3167 &adapter->ras_comps_tok,
3168 GFP_KERNEL);
3169 if (!adapter->ras_comps) {
3170 if (!firmware_has_feature(FW_FEATURE_CMO))
3171 dev_err(dev, "Couldn't alloc fw comps buffer\n");
3172 return;
3173 }
3174
3175 adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3176 sizeof(struct ibmvnic_fw_comp_internal),
3177 GFP_KERNEL);
3178 if (!adapter->ras_comp_int)
3179 dma_free_coherent(dev, len, adapter->ras_comps,
3180 adapter->ras_comps_tok);
3181
3182 memset(&newcrq, 0, sizeof(newcrq));
3183 newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3184 newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3185 newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3186 newcrq.request_ras_comps.len = cpu_to_be32(len);
3187 ibmvnic_send_crq(adapter, &newcrq);
3188}
3189
3190static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3191{
96183182 3192 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
032c5e82 3193 struct device *dev = &adapter->vdev->dev;
96183182 3194 struct ibmvnic_error_buff *error_buff, *tmp2;
032c5e82
TF		 3195 unsigned long flags;
3196 unsigned long flags2;
3197
3198 spin_lock_irqsave(&adapter->inflight_lock, flags);
96183182 3199 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
032c5e82
TF		 3200 switch (inflight_cmd->crq.generic.cmd) {
3201 case LOGIN:
3202 dma_unmap_single(dev, adapter->login_buf_token,
3203 adapter->login_buf_sz,
3204 DMA_BIDIRECTIONAL);
3205 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3206 adapter->login_rsp_buf_sz,
3207 DMA_BIDIRECTIONAL);
3208 kfree(adapter->login_rsp_buf);
3209 kfree(adapter->login_buf);
3210 break;
3211 case REQUEST_DUMP:
3212 complete(&adapter->fw_done);
3213 break;
3214 case REQUEST_ERROR_INFO:
3215 spin_lock_irqsave(&adapter->error_list_lock, flags2);
96183182
WY		 3216 list_for_each_entry_safe(error_buff, tmp2,
3217 &adapter->errors, list) {
032c5e82
TF		 3218 dma_unmap_single(dev, error_buff->dma,
3219 error_buff->len,
3220 DMA_FROM_DEVICE);
3221 kfree(error_buff->buff);
3222 list_del(&error_buff->list);
3223 kfree(error_buff);
3224 }
3225 spin_unlock_irqrestore(&adapter->error_list_lock,
3226 flags2);
3227 break;
3228 }
3229 list_del(&inflight_cmd->list);
3230 kfree(inflight_cmd);
3231 }
3232 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3233}
3234
9888d7b0
TF		 3235static void ibmvnic_xport_event(struct work_struct *work)
3236{
3237 struct ibmvnic_adapter *adapter = container_of(work,
3238 struct ibmvnic_adapter,
3239 ibmvnic_xport);
3240 struct device *dev = &adapter->vdev->dev;
3241 long rc;
3242
3243 ibmvnic_free_inflight(adapter);
3244 release_sub_crqs(adapter);
3245 if (adapter->migrated) {
3246 rc = ibmvnic_reenable_crq_queue(adapter);
3247 if (rc)
3248 dev_err(dev, "Error after enable rc=%ld\n", rc);
3249 adapter->migrated = false;
3250 rc = ibmvnic_send_crq_init(adapter);
3251 if (rc)
3252 dev_err(dev, "Error sending init rc=%ld\n", rc);
3253 }
3254}
3255
032c5e82
TF		 3256static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3257 struct ibmvnic_adapter *adapter)
3258{
3259 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3260 struct net_device *netdev = adapter->netdev;
3261 struct device *dev = &adapter->vdev->dev;
3262 long rc;
3263
3264 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3265 ((unsigned long int *)crq)[0],
3266 ((unsigned long int *)crq)[1]);
3267 switch (gen_crq->first) {
3268 case IBMVNIC_CRQ_INIT_RSP:
3269 switch (gen_crq->cmd) {
3270 case IBMVNIC_CRQ_INIT:
3271 dev_info(dev, "Partner initialized\n");
3272 /* Send back a response */
3273 rc = ibmvnic_send_crq_init_complete(adapter);
65dc6891
TF		 3274 if (!rc)
3275 schedule_work(&adapter->vnic_crq_init);
032c5e82
TF		 3276 else
3277 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3278 break;
3279 case IBMVNIC_CRQ_INIT_COMPLETE:
3280 dev_info(dev, "Partner initialization complete\n");
3281 send_version_xchg(adapter);
3282 break;
3283 default:
3284 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3285 }
3286 return;
3287 case IBMVNIC_CRQ_XPORT_EVENT:
3288 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3289 dev_info(dev, "Re-enabling adapter\n");
3290 adapter->migrated = true;
9888d7b0 3291 schedule_work(&adapter->ibmvnic_xport);
dfad09a6
TF		 3292 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3293 dev_info(dev, "Backing device failover detected\n");
3294 netif_carrier_off(netdev);
3295 adapter->failover = true;
032c5e82
TF		 3296 } else {
3297 /* The adapter lost the connection */
3298 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3299 gen_crq->cmd);
9888d7b0 3300 schedule_work(&adapter->ibmvnic_xport);
032c5e82
TF		 3301 }
3302 return;
3303 case IBMVNIC_CRQ_CMD_RSP:
3304 break;
3305 default:
3306 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3307 gen_crq->first);
3308 return;
3309 }
3310
3311 switch (gen_crq->cmd) {
3312 case VERSION_EXCHANGE_RSP:
3313 rc = crq->version_exchange_rsp.rc.code;
3314 if (rc) {
3315 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3316 break;
3317 }
3318 dev_info(dev, "Partner protocol version is %d\n",
3319 crq->version_exchange_rsp.version);
3320 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3321 ibmvnic_version)
3322 ibmvnic_version =
3323 be16_to_cpu(crq->version_exchange_rsp.version);
3324 send_cap_queries(adapter);
3325 break;
3326 case QUERY_CAPABILITY_RSP:
3327 handle_query_cap_rsp(crq, adapter);
3328 break;
3329 case QUERY_MAP_RSP:
3330 handle_query_map_rsp(crq, adapter);
3331 break;
3332 case REQUEST_MAP_RSP:
3333 handle_request_map_rsp(crq, adapter);
3334 break;
3335 case REQUEST_UNMAP_RSP:
3336 handle_request_unmap_rsp(crq, adapter);
3337 break;
3338 case REQUEST_CAPABILITY_RSP:
3339 handle_request_cap_rsp(crq, adapter);
3340 break;
3341 case LOGIN_RSP:
3342 netdev_dbg(netdev, "Got Login Response\n");
3343 handle_login_rsp(crq, adapter);
3344 break;
3345 case LOGICAL_LINK_STATE_RSP:
3346 netdev_dbg(netdev, "Got Logical Link State Response\n");
3347 adapter->logical_link_state =
3348 crq->logical_link_state_rsp.link_state;
3349 break;
3350 case LINK_STATE_INDICATION:
3351 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3352 adapter->phys_link_state =
3353 crq->link_state_indication.phys_link_state;
3354 adapter->logical_link_state =
3355 crq->link_state_indication.logical_link_state;
3356 break;
3357 case CHANGE_MAC_ADDR_RSP:
3358 netdev_dbg(netdev, "Got MAC address change Response\n");
3359 handle_change_mac_rsp(crq, adapter);
3360 break;
3361 case ERROR_INDICATION:
3362 netdev_dbg(netdev, "Got Error Indication\n");
3363 handle_error_indication(crq, adapter);
3364 break;
3365 case REQUEST_ERROR_RSP:
3366 netdev_dbg(netdev, "Got Error Detail Response\n");
3367 handle_error_info_rsp(crq, adapter);
3368 break;
3369 case REQUEST_STATISTICS_RSP:
3370 netdev_dbg(netdev, "Got Statistics Response\n");
3371 complete(&adapter->stats_done);
3372 break;
3373 case REQUEST_DUMP_SIZE_RSP:
3374 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3375 handle_dump_size_rsp(crq, adapter);
3376 break;
3377 case REQUEST_DUMP_RSP:
3378 netdev_dbg(netdev, "Got Request Dump Response\n");
3379 complete(&adapter->fw_done);
3380 break;
3381 case QUERY_IP_OFFLOAD_RSP:
3382 netdev_dbg(netdev, "Got Query IP offload Response\n");
3383 handle_query_ip_offload_rsp(adapter);
3384 break;
3385 case MULTICAST_CTRL_RSP:
3386 netdev_dbg(netdev, "Got multicast control Response\n");
3387 break;
3388 case CONTROL_IP_OFFLOAD_RSP:
3389 netdev_dbg(netdev, "Got Control IP offload Response\n");
3390 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3391 sizeof(adapter->ip_offload_ctrl),
3392 DMA_TO_DEVICE);
3393 /* We're done with the queries, perform the login */
3394 send_login(adapter);
3395 break;
3396 case REQUEST_RAS_COMP_NUM_RSP:
3397 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3398 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3399 netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3400 break;
3401 }
3402 adapter->ras_comp_num =
3403 be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3404 handle_request_ras_comp_num_rsp(crq, adapter);
3405 break;
3406 case REQUEST_RAS_COMPS_RSP:
3407 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3408 handle_request_ras_comps_rsp(crq, adapter);
3409 break;
3410 case CONTROL_RAS_RSP:
3411 netdev_dbg(netdev, "Got Control RAS Response\n");
3412 handle_control_ras_rsp(crq, adapter);
3413 break;
3414 case COLLECT_FW_TRACE_RSP:
3415 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3416 complete(&adapter->fw_done);
3417 break;
3418 default:
3419 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3420 gen_crq->cmd);
3421 }
3422}
3423
3424static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3425{
3426 struct ibmvnic_adapter *adapter = instance;
3427 struct ibmvnic_crq_queue *queue = &adapter->crq;
3428 struct vio_dev *vdev = adapter->vdev;
3429 union ibmvnic_crq *crq;
3430 unsigned long flags;
3431 bool done = false;
3432
3433 spin_lock_irqsave(&queue->lock, flags);
3434 vio_disable_interrupts(vdev);
3435 while (!done) {
3436 /* Pull all the valid messages off the CRQ */
3437 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3438 ibmvnic_handle_crq(crq, adapter);
3439 crq->generic.first = 0;
3440 }
3441 vio_enable_interrupts(vdev);
3442 crq = ibmvnic_next_crq(adapter);
3443 if (crq) {
3444 vio_disable_interrupts(vdev);
3445 ibmvnic_handle_crq(crq, adapter);
3446 crq->generic.first = 0;
3447 } else {
3448 done = true;
3449 }
3450 }
3451 spin_unlock_irqrestore(&queue->lock, flags);
3452 return IRQ_HANDLED;
3453}
3454
3455static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3456{
3457 struct vio_dev *vdev = adapter->vdev;
3458 int rc;
3459
3460 do {
3461 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3462 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3463
3464 if (rc)
3465 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3466
3467 return rc;
3468}
3469
3470static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3471{
3472 struct ibmvnic_crq_queue *crq = &adapter->crq;
3473 struct device *dev = &adapter->vdev->dev;
3474 struct vio_dev *vdev = adapter->vdev;
3475 int rc;
3476
3477 /* Close the CRQ */
3478 do {
3479 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3480 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3481
3482 /* Clean out the queue */
3483 memset(crq->msgs, 0, PAGE_SIZE);
3484 crq->cur = 0;
3485
3486 /* And re-open it again */
3487 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3488 crq->msg_token, PAGE_SIZE);
3489
3490 if (rc == H_CLOSED)
3491 /* Adapter is good, but other end is not ready */
3492 dev_warn(dev, "Partner adapter not ready\n");
3493 else if (rc != 0)
3494 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3495
3496 return rc;
3497}
3498
3499static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3500{
3501 struct ibmvnic_crq_queue *crq = &adapter->crq;
3502 struct vio_dev *vdev = adapter->vdev;
3503 long rc;
3504
3505 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3506 free_irq(vdev->irq, adapter);
3507 do {
3508 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3509 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3510
3511 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3512 DMA_BIDIRECTIONAL);
3513 free_page((unsigned long)crq->msgs);
3514}
3515
3516static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3517{
3518 struct ibmvnic_crq_queue *crq = &adapter->crq;
3519 struct device *dev = &adapter->vdev->dev;
3520 struct vio_dev *vdev = adapter->vdev;
3521 int rc, retrc = -ENOMEM;
3522
3523 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3524 /* Should we allocate more than one page? */
3525
3526 if (!crq->msgs)
3527 return -ENOMEM;
3528
3529 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3530 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3531 DMA_BIDIRECTIONAL);
3532 if (dma_mapping_error(dev, crq->msg_token))
3533 goto map_failed;
3534
3535 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3536 crq->msg_token, PAGE_SIZE);
3537
3538 if (rc == H_RESOURCE)
3539 /* maybe kexecing and resource is busy. try a reset */
3540 rc = ibmvnic_reset_crq(adapter);
3541 retrc = rc;
3542
3543 if (rc == H_CLOSED) {
3544 dev_warn(dev, "Partner adapter not ready\n");
3545 } else if (rc) {
3546 dev_warn(dev, "Error %d opening adapter\n", rc);
3547 goto reg_crq_failed;
3548 }
3549
3550 retrc = 0;
3551
3552 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3553 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3554 adapter);
3555 if (rc) {
3556 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3557 vdev->irq, rc);
3558 goto req_irq_failed;
3559 }
3560
3561 rc = vio_enable_interrupts(vdev);
3562 if (rc) {
3563 dev_err(dev, "Error %d enabling interrupts\n", rc);
3564 goto req_irq_failed;
3565 }
3566
3567 crq->cur = 0;
3568 spin_lock_init(&crq->lock);
3569
3570 return retrc;
3571
3572req_irq_failed:
3573 do {
3574 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3575 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3576reg_crq_failed:
3577 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3578map_failed:
3579 free_page((unsigned long)crq->msgs);
3580 return retrc;
3581}
3582
3583/* debugfs for dump */
3584static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3585{
3586 struct net_device *netdev = seq->private;
3587 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3588 struct device *dev = &adapter->vdev->dev;
3589 union ibmvnic_crq crq;
3590
3591 memset(&crq, 0, sizeof(crq));
3592 crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3593 crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3594 ibmvnic_send_crq(adapter, &crq);
3595
3596 init_completion(&adapter->fw_done);
3597 wait_for_completion(&adapter->fw_done);
3598
3599 seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3600
3601 dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3602 DMA_BIDIRECTIONAL);
3603
3604 kfree(adapter->dump_data);
3605
3606 return 0;
3607}
3608
3609static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3610{
3611 return single_open(file, ibmvnic_dump_show, inode->i_private);
3612}
3613
3614static const struct file_operations ibmvnic_dump_ops = {
3615 .owner = THIS_MODULE,
3616 .open = ibmvnic_dump_open,
3617 .read = seq_read,
3618 .llseek = seq_lseek,
3619 .release = single_release,
3620};
3621
65dc6891
TF		 3622static void handle_crq_init_rsp(struct work_struct *work)
3623{
3624 struct ibmvnic_adapter *adapter = container_of(work,
3625 struct ibmvnic_adapter,
3626 vnic_crq_init);
3627 struct device *dev = &adapter->vdev->dev;
3628 struct net_device *netdev = adapter->netdev;
3629 unsigned long timeout = msecs_to_jiffies(30000);
dfad09a6 3630 bool restart = false;
65dc6891
TF		 3631 int rc;
3632
dfad09a6
TF		 3633 if (adapter->failover) {
3634 release_sub_crqs(adapter);
3635 if (netif_running(netdev)) {
3636 netif_tx_disable(netdev);
3637 ibmvnic_close(netdev);
3638 restart = true;
3639 }
3640 }
3641
65dc6891
TF		 3642 send_version_xchg(adapter);
3643 reinit_completion(&adapter->init_done);
3644 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3645 dev_err(dev, "Passive init timeout\n");
3646 goto task_failed;
3647 }
3648
3649 do {
3650 if (adapter->renegotiate) {
3651 adapter->renegotiate = false;
3652 release_sub_crqs_no_irqs(adapter);
3653 send_cap_queries(adapter);
3654
3655 reinit_completion(&adapter->init_done);
3656 if (!wait_for_completion_timeout(&adapter->init_done,
3657 timeout)) {
3658 dev_err(dev, "Passive init timeout\n");
3659 goto task_failed;
3660 }
3661 }
3662 } while (adapter->renegotiate);
3663 rc = init_sub_crq_irqs(adapter);
3664
3665 if (rc)
3666 goto task_failed;
3667
3668 netdev->real_num_tx_queues = adapter->req_tx_queues;
87737f88 3669 netdev->mtu = adapter->req_mtu;
65dc6891 3670
dfad09a6
TF		 3671 if (adapter->failover) {
3672 adapter->failover = false;
3673 if (restart) {
3674 rc = ibmvnic_open(netdev);
3675 if (rc)
3676 goto restart_failed;
3677 }
3678 netif_carrier_on(netdev);
3679 return;
3680 }
3681
65dc6891
TF		 3682 rc = register_netdev(netdev);
3683 if (rc) {
3684 dev_err(dev,
3685 "failed to register netdev rc=%d\n", rc);
3686 goto register_failed;
3687 }
3688 dev_info(dev, "ibmvnic registered\n");
3689
3690 return;
3691
dfad09a6
TF		 3692restart_failed:
3693 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
65dc6891
TF		 3694register_failed:
3695 release_sub_crqs(adapter);
3696task_failed:
3697 dev_err(dev, "Passive initialization was not successful\n");
3698}
3699
032c5e82
TF		 3700static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3701{
ea22d51a 3702 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82
TF		 3703 struct ibmvnic_adapter *adapter;
3704 struct net_device *netdev;
3705 unsigned char *mac_addr_p;
3706 struct dentry *ent;
e1fac0ad 3707 char buf[17]; /* debugfs name buf */
032c5e82
TF		 3708 int rc;
3709
3710 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3711 dev->unit_address);
3712
3713 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3714 VETH_MAC_ADDR, NULL);
3715 if (!mac_addr_p) {
3716 dev_err(&dev->dev,
3717 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3718 __FILE__, __LINE__);
3719 return 0;
3720 }
3721
3722 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3723 IBMVNIC_MAX_TX_QUEUES);
3724 if (!netdev)
3725 return -ENOMEM;
3726
3727 adapter = netdev_priv(netdev);
3728 dev_set_drvdata(&dev->dev, netdev);
3729 adapter->vdev = dev;
3730 adapter->netdev = netdev;
dfad09a6 3731 adapter->failover = false;
032c5e82
TF		 3732
3733 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3734 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3735 netdev->irq = dev->irq;
3736 netdev->netdev_ops = &ibmvnic_netdev_ops;
3737 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3738 SET_NETDEV_DEV(netdev, &dev->dev);
3739
65dc6891 3740 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
9888d7b0 3741 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
65dc6891 3742
032c5e82
TF		 3743 spin_lock_init(&adapter->stats_lock);
3744
3745 rc = ibmvnic_init_crq_queue(adapter);
3746 if (rc) {
3747 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3748 goto free_netdev;
3749 }
3750
3751 INIT_LIST_HEAD(&adapter->errors);
3752 INIT_LIST_HEAD(&adapter->inflight);
3753 spin_lock_init(&adapter->error_list_lock);
3754 spin_lock_init(&adapter->inflight_lock);
3755
3756 adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3757 sizeof(struct ibmvnic_statistics),
3758 DMA_FROM_DEVICE);
3759 if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3760 if (!firmware_has_feature(FW_FEATURE_CMO))
3761 dev_err(&dev->dev, "Couldn't map stats buffer\n");
0e87203a 3762 rc = -ENOMEM;
032c5e82
TF		 3763 goto free_crq;
3764 }
3765
3766 snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3767 ent = debugfs_create_dir(buf, NULL);
3768 if (!ent || IS_ERR(ent)) {
3769 dev_info(&dev->dev, "debugfs create directory failed\n");
3770 adapter->debugfs_dir = NULL;
3771 } else {
3772 adapter->debugfs_dir = ent;
3773 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3774 netdev, &ibmvnic_dump_ops);
3775 if (!ent || IS_ERR(ent)) {
3776 dev_info(&dev->dev,
3777 "debugfs create dump file failed\n");
3778 adapter->debugfs_dump = NULL;
3779 } else {
3780 adapter->debugfs_dump = ent;
3781 }
3782 }
3783 ibmvnic_send_crq_init(adapter);
3784
3785 init_completion(&adapter->init_done);
ea22d51a
TF		 3786 if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3787 return 0;
032c5e82 3788
498cd8e4 3789 do {
498cd8e4 3790 if (adapter->renegotiate) {
ea22d51a
TF		 3791 adapter->renegotiate = false;
3792 release_sub_crqs_no_irqs(adapter);
498cd8e4
JA		 3793 send_cap_queries(adapter);
3794
3795 reinit_completion(&adapter->init_done);
ea22d51a
TF		 3796 if (!wait_for_completion_timeout(&adapter->init_done,
3797 timeout))
3798 return 0;
498cd8e4
JA		 3799 }
3800 } while (adapter->renegotiate);
032c5e82 3801
ea22d51a
TF		 3802 rc = init_sub_crq_irqs(adapter);
3803 if (rc) {
3804 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3805 goto free_debugfs;
032c5e82
TF		 3806 }
3807
3808 netdev->real_num_tx_queues = adapter->req_tx_queues;
87737f88 3809 netdev->mtu = adapter->req_mtu;
032c5e82
TF		 3810
3811 rc = register_netdev(netdev);
3812 if (rc) {
3813 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
ea22d51a 3814 goto free_sub_crqs;
032c5e82
TF		 3815 }
3816 dev_info(&dev->dev, "ibmvnic registered\n");
3817
3818 return 0;
3819
ea22d51a
TF		 3820free_sub_crqs:
3821 release_sub_crqs(adapter);
032c5e82
TF		 3822free_debugfs:
3823 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3824 debugfs_remove_recursive(adapter->debugfs_dir);
3825free_crq:
3826 ibmvnic_release_crq_queue(adapter);
3827free_netdev:
3828 free_netdev(netdev);
3829 return rc;
3830}
3831
3832static int ibmvnic_remove(struct vio_dev *dev)
3833{
3834 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3835 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3836
3837 unregister_netdev(netdev);
3838
3839 release_sub_crqs(adapter);
3840
3841 ibmvnic_release_crq_queue(adapter);
3842
3843 if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3844 debugfs_remove_recursive(adapter->debugfs_dir);
3845
b7f193da
TF		 3846 dma_unmap_single(&dev->dev, adapter->stats_token,
3847 sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3848
032c5e82
TF		 3849 if (adapter->ras_comps)
3850 dma_free_coherent(&dev->dev,
3851 adapter->ras_comp_num *
3852 sizeof(struct ibmvnic_fw_component),
3853 adapter->ras_comps, adapter->ras_comps_tok);
3854
3855 kfree(adapter->ras_comp_int);
3856
3857 free_netdev(netdev);
3858 dev_set_drvdata(&dev->dev, NULL);
3859
3860 return 0;
3861}
3862
3863static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3864{
3865 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3866 struct ibmvnic_adapter *adapter;
3867 struct iommu_table *tbl;
3868 unsigned long ret = 0;
3869 int i;
3870
3871 tbl = get_iommu_table_base(&vdev->dev);
3872
3873 /* netdev inits at probe time along with the structures we need below*/
3874 if (!netdev)
3875 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3876
3877 adapter = netdev_priv(netdev);
3878
3879 ret += PAGE_SIZE; /* the crq message queue */
3880 ret += adapter->bounce_buffer_size;
3881 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3882
3883 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3884 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3885
3886 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3887 i++)
3888 ret += adapter->rx_pool[i].size *
3889 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3890
3891 return ret;
3892}
3893
3894static int ibmvnic_resume(struct device *dev)
3895{
3896 struct net_device *netdev = dev_get_drvdata(dev);
3897 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3898 int i;
3899
3900 /* kick the interrupt handlers just in case we lost an interrupt */
3901 for (i = 0; i < adapter->req_rx_queues; i++)
3902 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3903 adapter->rx_scrq[i]);
3904
3905 return 0;
3906}
3907
3908static struct vio_device_id ibmvnic_device_table[] = {
3909 {"network", "IBM,vnic"},
3910 {"", "" }
3911};
3912MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3913
3914static const struct dev_pm_ops ibmvnic_pm_ops = {
3915 .resume = ibmvnic_resume
3916};
3917
3918static struct vio_driver ibmvnic_driver = {
3919 .id_table = ibmvnic_device_table,
3920 .probe = ibmvnic_probe,
3921 .remove = ibmvnic_remove,
3922 .get_desired_dma = ibmvnic_get_desired_dma,
3923 .name = ibmvnic_driver_name,
3924 .pm = &ibmvnic_pm_ops,
3925};
3926
3927/* module functions */
3928static int __init ibmvnic_module_init(void)
3929{
3930 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3931 IBMVNIC_DRIVER_VERSION);
3932
3933 return vio_register_driver(&ibmvnic_driver);
3934}
3935
3936static void __exit ibmvnic_module_exit(void)
3937{
3938 vio_unregister_driver(&ibmvnic_driver);
3939}
3940
3941module_init(ibmvnic_module_init);
3942module_exit(ibmvnic_module_exit);
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