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ibmvnic: Set real number of rx queues
[mirror_ubuntu-artful-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>
032c5e82
TF		 68#include <linux/interrupt.h>
69#include <net/net_namespace.h>
70#include <asm/hvcall.h>
71#include <linux/atomic.h>
72#include <asm/vio.h>
73#include <asm/iommu.h>
74#include <linux/uaccess.h>
75#include <asm/firmware.h>
65dc6891 76#include <linux/workqueue.h>
032c5e82
TF		 77
78#include "ibmvnic.h"
79
80static const char ibmvnic_driver_name[] = "ibmvnic";
81static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
82
83MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
84MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
85MODULE_LICENSE("GPL");
86MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
87
88static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
89static int ibmvnic_remove(struct vio_dev *);
90static void release_sub_crqs(struct ibmvnic_adapter *);
91static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
92static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
93static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
94static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
95static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
96 union sub_crq *sub_crq);
ad7775dc 97static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 98static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
99static int enable_scrq_irq(struct ibmvnic_adapter *,
100 struct ibmvnic_sub_crq_queue *);
101static int disable_scrq_irq(struct ibmvnic_adapter *,
102 struct ibmvnic_sub_crq_queue *);
103static int pending_scrq(struct ibmvnic_adapter *,
104 struct ibmvnic_sub_crq_queue *);
105static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
106 struct ibmvnic_sub_crq_queue *);
107static int ibmvnic_poll(struct napi_struct *napi, int data);
108static void send_map_query(struct ibmvnic_adapter *adapter);
109static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
110static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 111static void send_login(struct ibmvnic_adapter *adapter);
112static void send_cap_queries(struct ibmvnic_adapter *adapter);
113static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 114static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 115static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 116
117struct ibmvnic_stat {
118 char name[ETH_GSTRING_LEN];
119 int offset;
120};
121
122#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
123 offsetof(struct ibmvnic_statistics, stat))
124#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
125
126static const struct ibmvnic_stat ibmvnic_stats[] = {
127 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
128 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
129 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
130 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
131 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
132 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
133 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
134 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
135 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
136 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
137 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
138 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
139 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
140 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
141 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
142 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
143 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
144 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
145 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
146 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
147 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
148 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
149};
150
151static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
152 unsigned long length, unsigned long *number,
153 unsigned long *irq)
154{
155 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
156 long rc;
157
158 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
159 *number = retbuf[0];
160 *irq = retbuf[1];
161
162 return rc;
163}
164
032c5e82
TF		 165static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
166 struct ibmvnic_long_term_buff *ltb, int size)
167{
168 struct device *dev = &adapter->vdev->dev;
169
170 ltb->size = size;
171 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
172 GFP_KERNEL);
173
174 if (!ltb->buff) {
175 dev_err(dev, "Couldn't alloc long term buffer\n");
176 return -ENOMEM;
177 }
178 ltb->map_id = adapter->map_id;
179 adapter->map_id++;
db5d0b59
NF		 180
181 init_completion(&adapter->fw_done);
032c5e82
TF		 182 send_request_map(adapter, ltb->addr,
183 ltb->size, ltb->map_id);
032c5e82
TF		 184 wait_for_completion(&adapter->fw_done);
185 return 0;
186}
187
188static void free_long_term_buff(struct ibmvnic_adapter *adapter,
189 struct ibmvnic_long_term_buff *ltb)
190{
191 struct device *dev = &adapter->vdev->dev;
192
c657e32c
NF		 193 if (!ltb->buff)
194 return;
195
dfad09a6
TF		 196 if (!adapter->failover)
197 send_request_unmap(adapter, ltb->map_id);
59af56c2 198 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 199}
200
032c5e82
TF		 201static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
202 struct ibmvnic_rx_pool *pool)
203{
204 int count = pool->size - atomic_read(&pool->available);
205 struct device *dev = &adapter->vdev->dev;
206 int buffers_added = 0;
207 unsigned long lpar_rc;
208 union sub_crq sub_crq;
209 struct sk_buff *skb;
210 unsigned int offset;
211 dma_addr_t dma_addr;
212 unsigned char *dst;
213 u64 *handle_array;
214 int shift = 0;
215 int index;
216 int i;
217
218 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
219 be32_to_cpu(adapter->login_rsp_buf->
220 off_rxadd_subcrqs));
221
222 for (i = 0; i < count; ++i) {
223 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
224 if (!skb) {
225 dev_err(dev, "Couldn't replenish rx buff\n");
226 adapter->replenish_no_mem++;
227 break;
228 }
229
230 index = pool->free_map[pool->next_free];
231
232 if (pool->rx_buff[index].skb)
233 dev_err(dev, "Inconsistent free_map!\n");
234
235 /* Copy the skb to the long term mapped DMA buffer */
236 offset = index * pool->buff_size;
237 dst = pool->long_term_buff.buff + offset;
238 memset(dst, 0, pool->buff_size);
239 dma_addr = pool->long_term_buff.addr + offset;
240 pool->rx_buff[index].data = dst;
241
242 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
243 pool->rx_buff[index].dma = dma_addr;
244 pool->rx_buff[index].skb = skb;
245 pool->rx_buff[index].pool_index = pool->index;
246 pool->rx_buff[index].size = pool->buff_size;
247
248 memset(&sub_crq, 0, sizeof(sub_crq));
249 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
250 sub_crq.rx_add.correlator =
251 cpu_to_be64((u64)&pool->rx_buff[index]);
252 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
253 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
254
255 /* The length field of the sCRQ is defined to be 24 bits so the
256 * buffer size needs to be left shifted by a byte before it is
257 * converted to big endian to prevent the last byte from being
258 * truncated.
259 */
260#ifdef __LITTLE_ENDIAN__
261 shift = 8;
262#endif
263 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
264
265 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
266 &sub_crq);
267 if (lpar_rc != H_SUCCESS)
268 goto failure;
269
270 buffers_added++;
271 adapter->replenish_add_buff_success++;
272 pool->next_free = (pool->next_free + 1) % pool->size;
273 }
274 atomic_add(buffers_added, &pool->available);
275 return;
276
277failure:
278 dev_info(dev, "replenish pools failure\n");
279 pool->free_map[pool->next_free] = index;
280 pool->rx_buff[index].skb = NULL;
281 if (!dma_mapping_error(dev, dma_addr))
282 dma_unmap_single(dev, dma_addr, pool->buff_size,
283 DMA_FROM_DEVICE);
284
285 dev_kfree_skb_any(skb);
286 adapter->replenish_add_buff_failure++;
287 atomic_add(buffers_added, &pool->available);
288}
289
290static void replenish_pools(struct ibmvnic_adapter *adapter)
291{
292 int i;
293
294 if (adapter->migrated)
295 return;
296
297 adapter->replenish_task_cycles++;
298 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
299 i++) {
300 if (adapter->rx_pool[i].active)
301 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
302 }
303}
304
7bbc27a4
NF		 305static void release_stats_token(struct ibmvnic_adapter *adapter)
306{
307 struct device *dev = &adapter->vdev->dev;
308
309 if (!adapter->stats_token)
310 return;
311
312 dma_unmap_single(dev, adapter->stats_token,
313 sizeof(struct ibmvnic_statistics),
314 DMA_FROM_DEVICE);
315 adapter->stats_token = 0;
316}
317
318static int init_stats_token(struct ibmvnic_adapter *adapter)
319{
320 struct device *dev = &adapter->vdev->dev;
321 dma_addr_t stok;
322
323 stok = dma_map_single(dev, &adapter->stats,
324 sizeof(struct ibmvnic_statistics),
325 DMA_FROM_DEVICE);
326 if (dma_mapping_error(dev, stok)) {
327 dev_err(dev, "Couldn't map stats buffer\n");
328 return -1;
329 }
330
331 adapter->stats_token = stok;
332 return 0;
333}
334
0ffe2cb7 335static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 336{
0ffe2cb7
NF		 337 struct ibmvnic_rx_pool *rx_pool;
338 int rx_scrqs;
339 int i, j;
032c5e82 340
0ffe2cb7 341 if (!adapter->rx_pool)
032c5e82
TF		 342 return;
343
0ffe2cb7
NF		 344 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
345 for (i = 0; i < rx_scrqs; i++) {
346 rx_pool = &adapter->rx_pool[i];
347
348 kfree(rx_pool->free_map);
349 free_long_term_buff(adapter, &rx_pool->long_term_buff);
350
351 if (!rx_pool->rx_buff)
352 continue;
353
354 for (j = 0; j < rx_pool->size; j++) {
355 if (rx_pool->rx_buff[j].skb) {
356 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
357 rx_pool->rx_buff[i].skb = NULL;
358 }
359 }
360
361 kfree(rx_pool->rx_buff);
362 }
363
364 kfree(adapter->rx_pool);
365 adapter->rx_pool = NULL;
366}
367
368static int init_rx_pools(struct net_device *netdev)
369{
370 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
371 struct device *dev = &adapter->vdev->dev;
372 struct ibmvnic_rx_pool *rx_pool;
373 int rxadd_subcrqs;
374 u64 *size_array;
375 int i, j;
376
377 rxadd_subcrqs =
378 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
379 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
380 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
381
382 adapter->rx_pool = kcalloc(rxadd_subcrqs,
383 sizeof(struct ibmvnic_rx_pool),
384 GFP_KERNEL);
385 if (!adapter->rx_pool) {
386 dev_err(dev, "Failed to allocate rx pools\n");
387 return -1;
388 }
389
390 for (i = 0; i < rxadd_subcrqs; i++) {
391 rx_pool = &adapter->rx_pool[i];
392
393 netdev_dbg(adapter->netdev,
394 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
395 i, adapter->req_rx_add_entries_per_subcrq,
396 be64_to_cpu(size_array[i]));
397
398 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
399 rx_pool->index = i;
400 rx_pool->buff_size = be64_to_cpu(size_array[i]);
401 rx_pool->active = 1;
402
403 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
404 GFP_KERNEL);
405 if (!rx_pool->free_map) {
406 release_rx_pools(adapter);
407 return -1;
032c5e82 408 }
0ffe2cb7
NF		 409
410 rx_pool->rx_buff = kcalloc(rx_pool->size,
411 sizeof(struct ibmvnic_rx_buff),
412 GFP_KERNEL);
413 if (!rx_pool->rx_buff) {
414 dev_err(dev, "Couldn't alloc rx buffers\n");
415 release_rx_pools(adapter);
416 return -1;
417 }
418
419 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
420 rx_pool->size * rx_pool->buff_size)) {
421 release_rx_pools(adapter);
422 return -1;
423 }
424
425 for (j = 0; j < rx_pool->size; ++j)
426 rx_pool->free_map[j] = j;
427
428 atomic_set(&rx_pool->available, 0);
429 rx_pool->next_alloc = 0;
430 rx_pool->next_free = 0;
032c5e82 431 }
0ffe2cb7
NF		 432
433 return 0;
032c5e82
TF		 434}
435
c657e32c
NF		 436static void release_tx_pools(struct ibmvnic_adapter *adapter)
437{
438 struct ibmvnic_tx_pool *tx_pool;
439 int i, tx_scrqs;
440
441 if (!adapter->tx_pool)
442 return;
443
444 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
445 for (i = 0; i < tx_scrqs; i++) {
446 tx_pool = &adapter->tx_pool[i];
447 kfree(tx_pool->tx_buff);
448 free_long_term_buff(adapter, &tx_pool->long_term_buff);
449 kfree(tx_pool->free_map);
450 }
451
452 kfree(adapter->tx_pool);
453 adapter->tx_pool = NULL;
454}
455
456static int init_tx_pools(struct net_device *netdev)
457{
458 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
459 struct device *dev = &adapter->vdev->dev;
460 struct ibmvnic_tx_pool *tx_pool;
461 int tx_subcrqs;
462 int i, j;
463
464 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
465 adapter->tx_pool = kcalloc(tx_subcrqs,
466 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
467 if (!adapter->tx_pool)
468 return -1;
469
470 for (i = 0; i < tx_subcrqs; i++) {
471 tx_pool = &adapter->tx_pool[i];
472 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
473 sizeof(struct ibmvnic_tx_buff),
474 GFP_KERNEL);
475 if (!tx_pool->tx_buff) {
476 dev_err(dev, "tx pool buffer allocation failed\n");
477 release_tx_pools(adapter);
478 return -1;
479 }
480
481 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
482 adapter->req_tx_entries_per_subcrq *
483 adapter->req_mtu)) {
484 release_tx_pools(adapter);
485 return -1;
486 }
487
488 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
489 sizeof(int), GFP_KERNEL);
490 if (!tx_pool->free_map) {
491 release_tx_pools(adapter);
492 return -1;
493 }
494
495 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
496 tx_pool->free_map[j] = j;
497
498 tx_pool->consumer_index = 0;
499 tx_pool->producer_index = 0;
500 }
501
502 return 0;
503}
504
661a2622
NF		 505static void release_error_buffers(struct ibmvnic_adapter *adapter)
506{
507 struct device *dev = &adapter->vdev->dev;
508 struct ibmvnic_error_buff *error_buff, *tmp;
509 unsigned long flags;
510
511 spin_lock_irqsave(&adapter->error_list_lock, flags);
512 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
513 list_del(&error_buff->list);
514 dma_unmap_single(dev, error_buff->dma, error_buff->len,
515 DMA_FROM_DEVICE);
516 kfree(error_buff->buff);
517 kfree(error_buff);
518 }
519 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
520}
521
a57a5d25 522static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 523{
524 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 525 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 526 struct device *dev = &adapter->vdev->dev;
032c5e82 527
bd0b6723
JA		 528 do {
529 if (adapter->renegotiate) {
530 adapter->renegotiate = false;
b510888f 531 release_sub_crqs(adapter);
bd0b6723
JA		 532
533 reinit_completion(&adapter->init_done);
534 send_cap_queries(adapter);
535 if (!wait_for_completion_timeout(&adapter->init_done,
536 timeout)) {
537 dev_err(dev, "Capabilities query timeout\n");
538 return -1;
539 }
540 }
541
542 reinit_completion(&adapter->init_done);
543 send_login(adapter);
544 if (!wait_for_completion_timeout(&adapter->init_done,
545 timeout)) {
546 dev_err(dev, "Login timeout\n");
547 return -1;
548 }
549 } while (adapter->renegotiate);
550
a57a5d25
JA		 551 return 0;
552}
553
1b8955ee
NF		 554static void release_resources(struct ibmvnic_adapter *adapter)
555{
1b8955ee
NF		 556 release_tx_pools(adapter);
557 release_rx_pools(adapter);
558
1b8955ee 559 release_stats_token(adapter);
661a2622 560 release_error_buffers(adapter);
1b8955ee
NF		 561}
562
7f3c6e6b
TF		 563static int set_real_num_queues(struct net_device *netdev)
564{
565 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
566 int rc;
567
568 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
569 if (rc) {
570 netdev_err(netdev, "failed to set the number of tx queues\n");
571 return rc;
572 }
573
574 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
575 if (rc)
576 netdev_err(netdev, "failed to set the number of rx queues\n");
577
578 return rc;
579}
580
a57a5d25
JA		 581static int ibmvnic_open(struct net_device *netdev)
582{
583 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
584 struct device *dev = &adapter->vdev->dev;
a57a5d25 585 union ibmvnic_crq crq;
a57a5d25 586 int rc = 0;
0ffe2cb7 587 int i;
a57a5d25 588
ea5509f5
JA		 589 if (adapter->is_closed) {
590 rc = ibmvnic_init(adapter);
591 if (rc)
592 return rc;
593 }
594
a57a5d25
JA		 595 rc = ibmvnic_login(netdev);
596 if (rc)
597 return rc;
598
7f3c6e6b
TF		 599 rc = set_real_num_queues(netdev);
600 if (rc)
601 return rc;
bd0b6723
JA		 602
603 rc = init_sub_crq_irqs(adapter);
604 if (rc) {
605 dev_err(dev, "failed to initialize sub crq irqs\n");
606 return -1;
607 }
608
032c5e82
TF		 609 adapter->map_id = 1;
610 adapter->napi = kcalloc(adapter->req_rx_queues,
611 sizeof(struct napi_struct), GFP_KERNEL);
612 if (!adapter->napi)
1b8955ee 613 goto ibmvnic_open_fail;
032c5e82
TF		 614 for (i = 0; i < adapter->req_rx_queues; i++) {
615 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
616 NAPI_POLL_WEIGHT);
617 napi_enable(&adapter->napi[i]);
618 }
032c5e82 619
032c5e82 620 send_map_query(adapter);
0ffe2cb7
NF		 621
622 rc = init_rx_pools(netdev);
623 if (rc)
1b8955ee 624 goto ibmvnic_open_fail;
032c5e82 625
c657e32c
NF		 626 rc = init_tx_pools(netdev);
627 if (rc)
1b8955ee 628 goto ibmvnic_open_fail;
f0b8c96c 629
032c5e82
TF		 630 replenish_pools(adapter);
631
632 /* We're ready to receive frames, enable the sub-crq interrupts and
633 * set the logical link state to up
634 */
635 for (i = 0; i < adapter->req_rx_queues; i++)
636 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
637
638 for (i = 0; i < adapter->req_tx_queues; i++)
639 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
640
641 memset(&crq, 0, sizeof(crq));
642 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
643 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
644 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
645 ibmvnic_send_crq(adapter, &crq);
646
b8efb894 647 netif_tx_start_all_queues(netdev);
ea5509f5 648 adapter->is_closed = false;
b8efb894 649
032c5e82
TF		 650 return 0;
651
1b8955ee 652ibmvnic_open_fail:
032c5e82 653 for (i = 0; i < adapter->req_rx_queues; i++)
e722af63 654 napi_disable(&adapter->napi[i]);
1b8955ee 655 release_resources(adapter);
032c5e82
TF		 656 return -ENOMEM;
657}
658
dd9c20fa
BK		 659static void disable_sub_crqs(struct ibmvnic_adapter *adapter)
660{
661 int i;
662
663 if (adapter->tx_scrq) {
664 for (i = 0; i < adapter->req_tx_queues; i++)
665 if (adapter->tx_scrq[i])
666 disable_irq(adapter->tx_scrq[i]->irq);
667 }
668
669 if (adapter->rx_scrq) {
670 for (i = 0; i < adapter->req_rx_queues; i++)
671 if (adapter->rx_scrq[i])
672 disable_irq(adapter->rx_scrq[i]->irq);
673 }
674}
675
ea5509f5
JA		 676static int ibmvnic_close(struct net_device *netdev)
677{
678 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
679 union ibmvnic_crq crq;
680 int i;
681
682 adapter->closing = true;
dd9c20fa 683 disable_sub_crqs(adapter);
ea5509f5
JA		 684
685 for (i = 0; i < adapter->req_rx_queues; i++)
686 napi_disable(&adapter->napi[i]);
687
688 if (!adapter->failover)
689 netif_tx_stop_all_queues(netdev);
032c5e82 690
ea5509f5
JA		 691 memset(&crq, 0, sizeof(crq));
692 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
693 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
694 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
695 ibmvnic_send_crq(adapter, &crq);
696
1b8955ee 697 release_resources(adapter);
ea5509f5
JA		 698
699 adapter->is_closed = true;
700 adapter->closing = false;
032c5e82
TF		 701 return 0;
702}
703
ad7775dc
TF		 704/**
705 * build_hdr_data - creates L2/L3/L4 header data buffer
706 * @hdr_field - bitfield determining needed headers
707 * @skb - socket buffer
708 * @hdr_len - array of header lengths
709 * @tot_len - total length of data
710 *
711 * Reads hdr_field to determine which headers are needed by firmware.
712 * Builds a buffer containing these headers. Saves individual header
713 * lengths and total buffer length to be used to build descriptors.
714 */
715static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
716 int *hdr_len, u8 *hdr_data)
717{
718 int len = 0;
719 u8 *hdr;
720
721 hdr_len[0] = sizeof(struct ethhdr);
722
723 if (skb->protocol == htons(ETH_P_IP)) {
724 hdr_len[1] = ip_hdr(skb)->ihl * 4;
725 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
726 hdr_len[2] = tcp_hdrlen(skb);
727 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
728 hdr_len[2] = sizeof(struct udphdr);
729 } else if (skb->protocol == htons(ETH_P_IPV6)) {
730 hdr_len[1] = sizeof(struct ipv6hdr);
731 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
732 hdr_len[2] = tcp_hdrlen(skb);
733 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
734 hdr_len[2] = sizeof(struct udphdr);
735 }
736
737 memset(hdr_data, 0, 120);
738 if ((hdr_field >> 6) & 1) {
739 hdr = skb_mac_header(skb);
740 memcpy(hdr_data, hdr, hdr_len[0]);
741 len += hdr_len[0];
742 }
743
744 if ((hdr_field >> 5) & 1) {
745 hdr = skb_network_header(skb);
746 memcpy(hdr_data + len, hdr, hdr_len[1]);
747 len += hdr_len[1];
748 }
749
750 if ((hdr_field >> 4) & 1) {
751 hdr = skb_transport_header(skb);
752 memcpy(hdr_data + len, hdr, hdr_len[2]);
753 len += hdr_len[2];
754 }
755 return len;
756}
757
758/**
759 * create_hdr_descs - create header and header extension descriptors
760 * @hdr_field - bitfield determining needed headers
761 * @data - buffer containing header data
762 * @len - length of data buffer
763 * @hdr_len - array of individual header lengths
764 * @scrq_arr - descriptor array
765 *
766 * Creates header and, if needed, header extension descriptors and
767 * places them in a descriptor array, scrq_arr
768 */
769
770static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
771 union sub_crq *scrq_arr)
772{
773 union sub_crq hdr_desc;
774 int tmp_len = len;
775 u8 *data, *cur;
776 int tmp;
777
778 while (tmp_len > 0) {
779 cur = hdr_data + len - tmp_len;
780
781 memset(&hdr_desc, 0, sizeof(hdr_desc));
782 if (cur != hdr_data) {
783 data = hdr_desc.hdr_ext.data;
784 tmp = tmp_len > 29 ? 29 : tmp_len;
785 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
786 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
787 hdr_desc.hdr_ext.len = tmp;
788 } else {
789 data = hdr_desc.hdr.data;
790 tmp = tmp_len > 24 ? 24 : tmp_len;
791 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
792 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
793 hdr_desc.hdr.len = tmp;
794 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
795 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
796 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
797 hdr_desc.hdr.flag = hdr_field << 1;
798 }
799 memcpy(data, cur, tmp);
800 tmp_len -= tmp;
801 *scrq_arr = hdr_desc;
802 scrq_arr++;
803 }
804}
805
806/**
807 * build_hdr_descs_arr - build a header descriptor array
808 * @skb - socket buffer
809 * @num_entries - number of descriptors to be sent
810 * @subcrq - first TX descriptor
811 * @hdr_field - bit field determining which headers will be sent
812 *
813 * This function will build a TX descriptor array with applicable
814 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
815 */
816
817static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
818 int *num_entries, u8 hdr_field)
819{
820 int hdr_len[3] = {0, 0, 0};
821 int tot_len, len;
822 u8 *hdr_data = txbuff->hdr_data;
823
824 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
825 txbuff->hdr_data);
826 len = tot_len;
827 len -= 24;
828 if (len > 0)
829 num_entries += len % 29 ? len / 29 + 1 : len / 29;
830 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
831 txbuff->indir_arr + 1);
832}
833
032c5e82
TF		 834static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
835{
836 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
837 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 838 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 839 struct device *dev = &adapter->vdev->dev;
840 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 841 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 842 struct ibmvnic_tx_pool *tx_pool;
843 unsigned int tx_send_failed = 0;
844 unsigned int tx_map_failed = 0;
845 unsigned int tx_dropped = 0;
846 unsigned int tx_packets = 0;
847 unsigned int tx_bytes = 0;
848 dma_addr_t data_dma_addr;
849 struct netdev_queue *txq;
032c5e82
TF		 850 unsigned long lpar_rc;
851 union sub_crq tx_crq;
852 unsigned int offset;
ad7775dc 853 int num_entries = 1;
032c5e82
TF		 854 unsigned char *dst;
855 u64 *handle_array;
856 int index = 0;
857 int ret = 0;
858
859 tx_pool = &adapter->tx_pool[queue_num];
142c0ac4 860 tx_scrq = adapter->tx_scrq[queue_num];
032c5e82
TF		 861 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
862 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
863 be32_to_cpu(adapter->login_rsp_buf->
864 off_txsubm_subcrqs));
865 if (adapter->migrated) {
866 tx_send_failed++;
867 tx_dropped++;
868 ret = NETDEV_TX_BUSY;
869 goto out;
870 }
871
872 index = tx_pool->free_map[tx_pool->consumer_index];
873 offset = index * adapter->req_mtu;
874 dst = tx_pool->long_term_buff.buff + offset;
875 memset(dst, 0, adapter->req_mtu);
876 skb_copy_from_linear_data(skb, dst, skb->len);
877 data_dma_addr = tx_pool->long_term_buff.addr + offset;
878
879 tx_pool->consumer_index =
880 (tx_pool->consumer_index + 1) %
068d9f90 881 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 882
883 tx_buff = &tx_pool->tx_buff[index];
884 tx_buff->skb = skb;
885 tx_buff->data_dma[0] = data_dma_addr;
886 tx_buff->data_len[0] = skb->len;
887 tx_buff->index = index;
888 tx_buff->pool_index = queue_num;
889 tx_buff->last_frag = true;
032c5e82
TF		 890
891 memset(&tx_crq, 0, sizeof(tx_crq));
892 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
893 tx_crq.v1.type = IBMVNIC_TX_DESC;
894 tx_crq.v1.n_crq_elem = 1;
895 tx_crq.v1.n_sge = 1;
896 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
897 tx_crq.v1.correlator = cpu_to_be32(index);
898 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
899 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
900 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
901
902 if (adapter->vlan_header_insertion) {
903 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
904 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
905 }
906
907 if (skb->protocol == htons(ETH_P_IP)) {
908 if (ip_hdr(skb)->version == 4)
909 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
910 else if (ip_hdr(skb)->version == 6)
911 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
912
913 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
914 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
915 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
916 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
917 }
918
ad7775dc 919 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 920 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 921 hdrs += 2;
922 }
923 /* determine if l2/3/4 headers are sent to firmware */
924 if ((*hdrs >> 7) & 1 &&
925 (skb->protocol == htons(ETH_P_IP) ||
926 skb->protocol == htons(ETH_P_IPV6))) {
927 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
928 tx_crq.v1.n_crq_elem = num_entries;
929 tx_buff->indir_arr[0] = tx_crq;
930 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
931 sizeof(tx_buff->indir_arr),
932 DMA_TO_DEVICE);
933 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
934 if (!firmware_has_feature(FW_FEATURE_CMO))
935 dev_err(dev, "tx: unable to map descriptor array\n");
936 tx_map_failed++;
937 tx_dropped++;
938 ret = NETDEV_TX_BUSY;
939 goto out;
940 }
498cd8e4 941 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 942 (u64)tx_buff->indir_dma,
943 (u64)num_entries);
944 } else {
498cd8e4
JA		 945 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
946 &tx_crq);
ad7775dc 947 }
032c5e82
TF		 948 if (lpar_rc != H_SUCCESS) {
949 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
950
951 if (tx_pool->consumer_index == 0)
952 tx_pool->consumer_index =
068d9f90 953 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 954 else
955 tx_pool->consumer_index--;
956
957 tx_send_failed++;
958 tx_dropped++;
959 ret = NETDEV_TX_BUSY;
960 goto out;
961 }
142c0ac4 962
58c8c0c0
BK		 963 if (atomic_inc_return(&tx_scrq->used)
964 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 965 netdev_info(netdev, "Stopping queue %d\n", queue_num);
966 netif_stop_subqueue(netdev, queue_num);
967 }
968
032c5e82
TF		 969 tx_packets++;
970 tx_bytes += skb->len;
971 txq->trans_start = jiffies;
972 ret = NETDEV_TX_OK;
973
974out:
975 netdev->stats.tx_dropped += tx_dropped;
976 netdev->stats.tx_bytes += tx_bytes;
977 netdev->stats.tx_packets += tx_packets;
978 adapter->tx_send_failed += tx_send_failed;
979 adapter->tx_map_failed += tx_map_failed;
980
981 return ret;
982}
983
984static void ibmvnic_set_multi(struct net_device *netdev)
985{
986 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
987 struct netdev_hw_addr *ha;
988 union ibmvnic_crq crq;
989
990 memset(&crq, 0, sizeof(crq));
991 crq.request_capability.first = IBMVNIC_CRQ_CMD;
992 crq.request_capability.cmd = REQUEST_CAPABILITY;
993
994 if (netdev->flags & IFF_PROMISC) {
995 if (!adapter->promisc_supported)
996 return;
997 } else {
998 if (netdev->flags & IFF_ALLMULTI) {
999 /* Accept all multicast */
1000 memset(&crq, 0, sizeof(crq));
1001 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1002 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1003 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1004 ibmvnic_send_crq(adapter, &crq);
1005 } else if (netdev_mc_empty(netdev)) {
1006 /* Reject all multicast */
1007 memset(&crq, 0, sizeof(crq));
1008 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1009 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1010 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1011 ibmvnic_send_crq(adapter, &crq);
1012 } else {
1013 /* Accept one or more multicast(s) */
1014 netdev_for_each_mc_addr(ha, netdev) {
1015 memset(&crq, 0, sizeof(crq));
1016 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1017 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1018 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1019 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1020 ha->addr);
1021 ibmvnic_send_crq(adapter, &crq);
1022 }
1023 }
1024 }
1025}
1026
1027static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1028{
1029 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1030 struct sockaddr *addr = p;
1031 union ibmvnic_crq crq;
1032
1033 if (!is_valid_ether_addr(addr->sa_data))
1034 return -EADDRNOTAVAIL;
1035
1036 memset(&crq, 0, sizeof(crq));
1037 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1038 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1039 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1040 ibmvnic_send_crq(adapter, &crq);
1041 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1042 return 0;
1043}
1044
032c5e82
TF		 1045static void ibmvnic_tx_timeout(struct net_device *dev)
1046{
1047 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1048 int rc;
1049
1050 /* Adapter timed out, resetting it */
1051 release_sub_crqs(adapter);
1052 rc = ibmvnic_reset_crq(adapter);
1053 if (rc)
1054 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
1055 else
1056 ibmvnic_send_crq_init(adapter);
1057}
1058
1059static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1060 struct ibmvnic_rx_buff *rx_buff)
1061{
1062 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1063
1064 rx_buff->skb = NULL;
1065
1066 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1067 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1068
1069 atomic_dec(&pool->available);
1070}
1071
1072static int ibmvnic_poll(struct napi_struct *napi, int budget)
1073{
1074 struct net_device *netdev = napi->dev;
1075 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1076 int scrq_num = (int)(napi - adapter->napi);
1077 int frames_processed = 0;
1078restart_poll:
1079 while (frames_processed < budget) {
1080 struct sk_buff *skb;
1081 struct ibmvnic_rx_buff *rx_buff;
1082 union sub_crq *next;
1083 u32 length;
1084 u16 offset;
1085 u8 flags = 0;
1086
1087 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1088 break;
1089 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1090 rx_buff =
1091 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1092 rx_comp.correlator);
1093 /* do error checking */
1094 if (next->rx_comp.rc) {
1095 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1096 /* free the entry */
1097 next->rx_comp.first = 0;
1098 remove_buff_from_pool(adapter, rx_buff);
1099 break;
1100 }
1101
1102 length = be32_to_cpu(next->rx_comp.len);
1103 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1104 flags = next->rx_comp.flags;
1105 skb = rx_buff->skb;
1106 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1107 length);
1108 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
1109 /* free the entry */
1110 next->rx_comp.first = 0;
1111 remove_buff_from_pool(adapter, rx_buff);
1112
1113 skb_put(skb, length);
1114 skb->protocol = eth_type_trans(skb, netdev);
1115
1116 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1117 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1118 skb->ip_summed = CHECKSUM_UNNECESSARY;
1119 }
1120
1121 length = skb->len;
1122 napi_gro_receive(napi, skb); /* send it up */
1123 netdev->stats.rx_packets++;
1124 netdev->stats.rx_bytes += length;
1125 frames_processed++;
1126 }
498cd8e4 1127 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1128
1129 if (frames_processed < budget) {
1130 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1131 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1132 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1133 napi_reschedule(napi)) {
1134 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1135 goto restart_poll;
1136 }
1137 }
1138 return frames_processed;
1139}
1140
1141#ifdef CONFIG_NET_POLL_CONTROLLER
1142static void ibmvnic_netpoll_controller(struct net_device *dev)
1143{
1144 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1145 int i;
1146
1147 replenish_pools(netdev_priv(dev));
1148 for (i = 0; i < adapter->req_rx_queues; i++)
1149 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1150 adapter->rx_scrq[i]);
1151}
1152#endif
1153
1154static const struct net_device_ops ibmvnic_netdev_ops = {
1155 .ndo_open = ibmvnic_open,
1156 .ndo_stop = ibmvnic_close,
1157 .ndo_start_xmit = ibmvnic_xmit,
1158 .ndo_set_rx_mode = ibmvnic_set_multi,
1159 .ndo_set_mac_address = ibmvnic_set_mac,
1160 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1161 .ndo_tx_timeout = ibmvnic_tx_timeout,
1162#ifdef CONFIG_NET_POLL_CONTROLLER
1163 .ndo_poll_controller = ibmvnic_netpoll_controller,
1164#endif
1165};
1166
1167/* ethtool functions */
1168
8a43379f
PR		 1169static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1170 struct ethtool_link_ksettings *cmd)
032c5e82 1171{
8a43379f
PR		 1172 u32 supported, advertising;
1173
1174 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1175 SUPPORTED_FIBRE);
8a43379f 1176 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1177 ADVERTISED_FIBRE);
8a43379f
PR		 1178 cmd->base.speed = SPEED_1000;
1179 cmd->base.duplex = DUPLEX_FULL;
1180 cmd->base.port = PORT_FIBRE;
1181 cmd->base.phy_address = 0;
1182 cmd->base.autoneg = AUTONEG_ENABLE;
1183
1184 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1185 supported);
1186 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1187 advertising);
1188
032c5e82
TF		 1189 return 0;
1190}
1191
1192static void ibmvnic_get_drvinfo(struct net_device *dev,
1193 struct ethtool_drvinfo *info)
1194{
1195 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1196 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1197}
1198
1199static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1200{
1201 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1202
1203 return adapter->msg_enable;
1204}
1205
1206static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1207{
1208 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1209
1210 adapter->msg_enable = data;
1211}
1212
1213static u32 ibmvnic_get_link(struct net_device *netdev)
1214{
1215 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1216
1217 /* Don't need to send a query because we request a logical link up at
1218 * init and then we wait for link state indications
1219 */
1220 return adapter->logical_link_state;
1221}
1222
1223static void ibmvnic_get_ringparam(struct net_device *netdev,
1224 struct ethtool_ringparam *ring)
1225{
1226 ring->rx_max_pending = 0;
1227 ring->tx_max_pending = 0;
1228 ring->rx_mini_max_pending = 0;
1229 ring->rx_jumbo_max_pending = 0;
1230 ring->rx_pending = 0;
1231 ring->tx_pending = 0;
1232 ring->rx_mini_pending = 0;
1233 ring->rx_jumbo_pending = 0;
1234}
1235
1236static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1237{
1238 int i;
1239
1240 if (stringset != ETH_SS_STATS)
1241 return;
1242
1243 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1244 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1245}
1246
1247static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1248{
1249 switch (sset) {
1250 case ETH_SS_STATS:
1251 return ARRAY_SIZE(ibmvnic_stats);
1252 default:
1253 return -EOPNOTSUPP;
1254 }
1255}
1256
1257static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1258 struct ethtool_stats *stats, u64 *data)
1259{
1260 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1261 union ibmvnic_crq crq;
1262 int i;
1263
1264 memset(&crq, 0, sizeof(crq));
1265 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1266 crq.request_statistics.cmd = REQUEST_STATISTICS;
1267 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1268 crq.request_statistics.len =
1269 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1270
1271 /* Wait for data to be written */
1272 init_completion(&adapter->stats_done);
db5d0b59 1273 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1274 wait_for_completion(&adapter->stats_done);
1275
1276 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1277 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1278}
1279
1280static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1281 .get_drvinfo = ibmvnic_get_drvinfo,
1282 .get_msglevel = ibmvnic_get_msglevel,
1283 .set_msglevel = ibmvnic_set_msglevel,
1284 .get_link = ibmvnic_get_link,
1285 .get_ringparam = ibmvnic_get_ringparam,
1286 .get_strings = ibmvnic_get_strings,
1287 .get_sset_count = ibmvnic_get_sset_count,
1288 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1289 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1290};
1291
1292/* Routines for managing CRQs/sCRQs */
1293
1294static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1295 struct ibmvnic_sub_crq_queue *scrq)
1296{
1297 struct device *dev = &adapter->vdev->dev;
1298 long rc;
1299
1300 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1301
1302 /* Close the sub-crqs */
1303 do {
1304 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1305 adapter->vdev->unit_address,
1306 scrq->crq_num);
1307 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1308
ffa73855
TF		 1309 if (rc) {
1310 netdev_err(adapter->netdev,
1311 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1312 scrq->crq_num, rc);
1313 }
1314
032c5e82
TF		 1315 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1316 DMA_BIDIRECTIONAL);
1317 free_pages((unsigned long)scrq->msgs, 2);
1318 kfree(scrq);
1319}
1320
1321static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1322 *adapter)
1323{
1324 struct device *dev = &adapter->vdev->dev;
1325 struct ibmvnic_sub_crq_queue *scrq;
1326 int rc;
1327
7f7adc50 1328 scrq = kzalloc(sizeof(*scrq), GFP_ATOMIC);
032c5e82
TF		 1329 if (!scrq)
1330 return NULL;
1331
7f7adc50
NF		 1332 scrq->msgs =
1333 (union sub_crq *)__get_free_pages(GFP_ATOMIC | __GFP_ZERO, 2);
032c5e82
TF		 1334 if (!scrq->msgs) {
1335 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1336 goto zero_page_failed;
1337 }
1338
1339 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1340 DMA_BIDIRECTIONAL);
1341 if (dma_mapping_error(dev, scrq->msg_token)) {
1342 dev_warn(dev, "Couldn't map crq queue messages page\n");
1343 goto map_failed;
1344 }
1345
1346 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1347 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1348
1349 if (rc == H_RESOURCE)
1350 rc = ibmvnic_reset_crq(adapter);
1351
1352 if (rc == H_CLOSED) {
1353 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1354 } else if (rc) {
1355 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1356 goto reg_failed;
1357 }
1358
032c5e82
TF		 1359 scrq->adapter = adapter;
1360 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1361 spin_lock_init(&scrq->lock);
1362
1363 netdev_dbg(adapter->netdev,
1364 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1365 scrq->crq_num, scrq->hw_irq, scrq->irq);
1366
1367 return scrq;
1368
032c5e82
TF		 1369reg_failed:
1370 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1371 DMA_BIDIRECTIONAL);
1372map_failed:
1373 free_pages((unsigned long)scrq->msgs, 2);
1374zero_page_failed:
1375 kfree(scrq);
1376
1377 return NULL;
1378}
1379
1380static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1381{
1382 int i;
1383
1384 if (adapter->tx_scrq) {
b510888f
NF		 1385 for (i = 0; i < adapter->req_tx_queues; i++) {
1386 if (!adapter->tx_scrq[i])
1387 continue;
1388
1389 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1390 free_irq(adapter->tx_scrq[i]->irq,
1391 adapter->tx_scrq[i]);
88eb98a0 1392 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1393 adapter->tx_scrq[i]->irq = 0;
032c5e82 1394 }
b510888f
NF		 1395
1396 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1397 }
1398
9501df3c 1399 kfree(adapter->tx_scrq);
032c5e82
TF		 1400 adapter->tx_scrq = NULL;
1401 }
1402
1403 if (adapter->rx_scrq) {
b510888f
NF		 1404 for (i = 0; i < adapter->req_rx_queues; i++) {
1405 if (!adapter->rx_scrq[i])
1406 continue;
1407
1408 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1409 free_irq(adapter->rx_scrq[i]->irq,
1410 adapter->rx_scrq[i]);
88eb98a0 1411 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1412 adapter->rx_scrq[i]->irq = 0;
032c5e82 1413 }
032c5e82 1414
b510888f
NF		 1415 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1416 }
ea22d51a 1417
b510888f 1418 kfree(adapter->rx_scrq);
ea22d51a
TF		 1419 adapter->rx_scrq = NULL;
1420 }
ea22d51a
TF		 1421}
1422
032c5e82
TF		 1423static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1424 struct ibmvnic_sub_crq_queue *scrq)
1425{
1426 struct device *dev = &adapter->vdev->dev;
1427 unsigned long rc;
1428
1429 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1430 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1431 if (rc)
1432 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1433 scrq->hw_irq, rc);
1434 return rc;
1435}
1436
1437static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1438 struct ibmvnic_sub_crq_queue *scrq)
1439{
1440 struct device *dev = &adapter->vdev->dev;
1441 unsigned long rc;
1442
1443 if (scrq->hw_irq > 0x100000000ULL) {
1444 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1445 return 1;
1446 }
1447
1448 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1449 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1450 if (rc)
1451 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1452 scrq->hw_irq, rc);
1453 return rc;
1454}
1455
1456static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1457 struct ibmvnic_sub_crq_queue *scrq)
1458{
1459 struct device *dev = &adapter->vdev->dev;
1460 struct ibmvnic_tx_buff *txbuff;
1461 union sub_crq *next;
1462 int index;
1463 int i, j;
ad7775dc 1464 u8 first;
032c5e82
TF		 1465
1466restart_loop:
1467 while (pending_scrq(adapter, scrq)) {
1468 unsigned int pool = scrq->pool_index;
1469
1470 next = ibmvnic_next_scrq(adapter, scrq);
1471 for (i = 0; i < next->tx_comp.num_comps; i++) {
1472 if (next->tx_comp.rcs[i]) {
1473 dev_err(dev, "tx error %x\n",
1474 next->tx_comp.rcs[i]);
1475 continue;
1476 }
1477 index = be32_to_cpu(next->tx_comp.correlators[i]);
1478 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1479
1480 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1481 if (!txbuff->data_dma[j])
1482 continue;
1483
1484 txbuff->data_dma[j] = 0;
032c5e82 1485 }
ad7775dc
TF		 1486 /* if sub_crq was sent indirectly */
1487 first = txbuff->indir_arr[0].generic.first;
1488 if (first == IBMVNIC_CRQ_CMD) {
1489 dma_unmap_single(dev, txbuff->indir_dma,
1490 sizeof(txbuff->indir_arr),
1491 DMA_TO_DEVICE);
1492 }
032c5e82 1493
142c0ac4 1494 if (txbuff->last_frag) {
58c8c0c0
BK		 1495 if (atomic_sub_return(next->tx_comp.num_comps,
1496 &scrq->used) <=
142c0ac4
TF		 1497 (adapter->req_tx_entries_per_subcrq / 2) &&
1498 netif_subqueue_stopped(adapter->netdev,
1499 txbuff->skb)) {
1500 netif_wake_subqueue(adapter->netdev,
1501 scrq->pool_index);
1502 netdev_dbg(adapter->netdev,
1503 "Started queue %d\n",
1504 scrq->pool_index);
1505 }
1506
032c5e82 1507 dev_kfree_skb_any(txbuff->skb);
142c0ac4 1508 }
032c5e82
TF		 1509
1510 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1511 producer_index] = index;
1512 adapter->tx_pool[pool].producer_index =
1513 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1514 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1515 }
1516 /* remove tx_comp scrq*/
1517 next->tx_comp.first = 0;
1518 }
1519
1520 enable_scrq_irq(adapter, scrq);
1521
1522 if (pending_scrq(adapter, scrq)) {
1523 disable_scrq_irq(adapter, scrq);
1524 goto restart_loop;
1525 }
1526
1527 return 0;
1528}
1529
1530static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1531{
1532 struct ibmvnic_sub_crq_queue *scrq = instance;
1533 struct ibmvnic_adapter *adapter = scrq->adapter;
1534
1535 disable_scrq_irq(adapter, scrq);
1536 ibmvnic_complete_tx(adapter, scrq);
1537
1538 return IRQ_HANDLED;
1539}
1540
1541static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1542{
1543 struct ibmvnic_sub_crq_queue *scrq = instance;
1544 struct ibmvnic_adapter *adapter = scrq->adapter;
1545
1546 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1547 disable_scrq_irq(adapter, scrq);
1548 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1549 }
1550
1551 return IRQ_HANDLED;
1552}
1553
ea22d51a
TF		 1554static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1555{
1556 struct device *dev = &adapter->vdev->dev;
1557 struct ibmvnic_sub_crq_queue *scrq;
1558 int i = 0, j = 0;
1559 int rc = 0;
1560
1561 for (i = 0; i < adapter->req_tx_queues; i++) {
1562 scrq = adapter->tx_scrq[i];
1563 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1564
99c1790e 1565 if (!scrq->irq) {
ea22d51a
TF		 1566 rc = -EINVAL;
1567 dev_err(dev, "Error mapping irq\n");
1568 goto req_tx_irq_failed;
1569 }
1570
1571 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1572 0, "ibmvnic_tx", scrq);
1573
1574 if (rc) {
1575 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1576 scrq->irq, rc);
1577 irq_dispose_mapping(scrq->irq);
1578 goto req_rx_irq_failed;
1579 }
1580 }
1581
1582 for (i = 0; i < adapter->req_rx_queues; i++) {
1583 scrq = adapter->rx_scrq[i];
1584 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1585 if (!scrq->irq) {
ea22d51a
TF		 1586 rc = -EINVAL;
1587 dev_err(dev, "Error mapping irq\n");
1588 goto req_rx_irq_failed;
1589 }
1590 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1591 0, "ibmvnic_rx", scrq);
1592 if (rc) {
1593 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1594 scrq->irq, rc);
1595 irq_dispose_mapping(scrq->irq);
1596 goto req_rx_irq_failed;
1597 }
1598 }
1599 return rc;
1600
1601req_rx_irq_failed:
8bf371e6 1602 for (j = 0; j < i; j++) {
ea22d51a
TF		 1603 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1604 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1605 }
ea22d51a
TF		 1606 i = adapter->req_tx_queues;
1607req_tx_irq_failed:
8bf371e6 1608 for (j = 0; j < i; j++) {
ea22d51a
TF		 1609 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1610 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1611 }
b510888f 1612 release_sub_crqs(adapter);
ea22d51a
TF		 1613 return rc;
1614}
1615
032c5e82
TF		 1616static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1617{
1618 struct device *dev = &adapter->vdev->dev;
1619 struct ibmvnic_sub_crq_queue **allqueues;
1620 int registered_queues = 0;
1621 union ibmvnic_crq crq;
1622 int total_queues;
1623 int more = 0;
ea22d51a 1624 int i;
032c5e82
TF		 1625
1626 if (!retry) {
1627 /* Sub-CRQ entries are 32 byte long */
1628 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1629
1630 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1631 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1632 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1633 goto allqueues_failed;
1634 }
1635
1636 /* Get the minimum between the queried max and the entries
1637 * that fit in our PAGE_SIZE
1638 */
1639 adapter->req_tx_entries_per_subcrq =
1640 adapter->max_tx_entries_per_subcrq > entries_page ?
1641 entries_page : adapter->max_tx_entries_per_subcrq;
1642 adapter->req_rx_add_entries_per_subcrq =
1643 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1644 entries_page : adapter->max_rx_add_entries_per_subcrq;
1645
6dbcd8fb
JA		 1646 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1647 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
498cd8e4 1648 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
032c5e82 1649
f39f0d1e 1650 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
032c5e82
TF		 1651 }
1652
1653 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1654
1655 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1656 if (!allqueues)
1657 goto allqueues_failed;
1658
1659 for (i = 0; i < total_queues; i++) {
1660 allqueues[i] = init_sub_crq_queue(adapter);
1661 if (!allqueues[i]) {
1662 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1663 break;
1664 }
1665 registered_queues++;
1666 }
1667
1668 /* Make sure we were able to register the minimum number of queues */
1669 if (registered_queues <
1670 adapter->min_tx_queues + adapter->min_rx_queues) {
1671 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1672 goto tx_failed;
1673 }
1674
1675 /* Distribute the failed allocated queues*/
1676 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1677 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1678 switch (i % 3) {
1679 case 0:
1680 if (adapter->req_rx_queues > adapter->min_rx_queues)
1681 adapter->req_rx_queues--;
1682 else
1683 more++;
1684 break;
1685 case 1:
1686 if (adapter->req_tx_queues > adapter->min_tx_queues)
1687 adapter->req_tx_queues--;
1688 else
1689 more++;
1690 break;
1691 }
1692 }
1693
1694 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1695 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1696 if (!adapter->tx_scrq)
1697 goto tx_failed;
1698
1699 for (i = 0; i < adapter->req_tx_queues; i++) {
1700 adapter->tx_scrq[i] = allqueues[i];
1701 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 1702 }
1703
1704 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1705 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1706 if (!adapter->rx_scrq)
1707 goto rx_failed;
1708
1709 for (i = 0; i < adapter->req_rx_queues; i++) {
1710 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1711 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 1712 }
1713
1714 memset(&crq, 0, sizeof(crq));
1715 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1716 crq.request_capability.cmd = REQUEST_CAPABILITY;
1717
1718 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 1719 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 1720 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1721 ibmvnic_send_crq(adapter, &crq);
1722
1723 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 1724 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 1725 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1726 ibmvnic_send_crq(adapter, &crq);
1727
1728 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 1729 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 1730 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1731 ibmvnic_send_crq(adapter, &crq);
1732
1733 crq.request_capability.capability =
1734 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1735 crq.request_capability.number =
de89e854 1736 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 1737 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1738 ibmvnic_send_crq(adapter, &crq);
1739
1740 crq.request_capability.capability =
1741 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1742 crq.request_capability.number =
de89e854 1743 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 1744 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1745 ibmvnic_send_crq(adapter, &crq);
1746
1747 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 1748 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 1749 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1750 ibmvnic_send_crq(adapter, &crq);
1751
1752 if (adapter->netdev->flags & IFF_PROMISC) {
1753 if (adapter->promisc_supported) {
1754 crq.request_capability.capability =
1755 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1756 crq.request_capability.number = cpu_to_be64(1);
901e040a 1757 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1758 ibmvnic_send_crq(adapter, &crq);
1759 }
1760 } else {
1761 crq.request_capability.capability =
1762 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1763 crq.request_capability.number = cpu_to_be64(0);
901e040a 1764 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1765 ibmvnic_send_crq(adapter, &crq);
1766 }
1767
1768 kfree(allqueues);
1769
1770 return;
1771
032c5e82
TF		 1772rx_failed:
1773 kfree(adapter->tx_scrq);
1774 adapter->tx_scrq = NULL;
1775tx_failed:
1776 for (i = 0; i < registered_queues; i++)
1777 release_sub_crq_queue(adapter, allqueues[i]);
1778 kfree(allqueues);
1779allqueues_failed:
1780 ibmvnic_remove(adapter->vdev);
1781}
1782
1783static int pending_scrq(struct ibmvnic_adapter *adapter,
1784 struct ibmvnic_sub_crq_queue *scrq)
1785{
1786 union sub_crq *entry = &scrq->msgs[scrq->cur];
1787
1788 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1789 return 1;
1790 else
1791 return 0;
1792}
1793
1794static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1795 struct ibmvnic_sub_crq_queue *scrq)
1796{
1797 union sub_crq *entry;
1798 unsigned long flags;
1799
1800 spin_lock_irqsave(&scrq->lock, flags);
1801 entry = &scrq->msgs[scrq->cur];
1802 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1803 if (++scrq->cur == scrq->size)
1804 scrq->cur = 0;
1805 } else {
1806 entry = NULL;
1807 }
1808 spin_unlock_irqrestore(&scrq->lock, flags);
1809
1810 return entry;
1811}
1812
1813static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1814{
1815 struct ibmvnic_crq_queue *queue = &adapter->crq;
1816 union ibmvnic_crq *crq;
1817
1818 crq = &queue->msgs[queue->cur];
1819 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1820 if (++queue->cur == queue->size)
1821 queue->cur = 0;
1822 } else {
1823 crq = NULL;
1824 }
1825
1826 return crq;
1827}
1828
1829static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1830 union sub_crq *sub_crq)
1831{
1832 unsigned int ua = adapter->vdev->unit_address;
1833 struct device *dev = &adapter->vdev->dev;
1834 u64 *u64_crq = (u64 *)sub_crq;
1835 int rc;
1836
1837 netdev_dbg(adapter->netdev,
1838 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1839 (unsigned long int)cpu_to_be64(remote_handle),
1840 (unsigned long int)cpu_to_be64(u64_crq[0]),
1841 (unsigned long int)cpu_to_be64(u64_crq[1]),
1842 (unsigned long int)cpu_to_be64(u64_crq[2]),
1843 (unsigned long int)cpu_to_be64(u64_crq[3]));
1844
1845 /* Make sure the hypervisor sees the complete request */
1846 mb();
1847
1848 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1849 cpu_to_be64(remote_handle),
1850 cpu_to_be64(u64_crq[0]),
1851 cpu_to_be64(u64_crq[1]),
1852 cpu_to_be64(u64_crq[2]),
1853 cpu_to_be64(u64_crq[3]));
1854
1855 if (rc) {
1856 if (rc == H_CLOSED)
1857 dev_warn(dev, "CRQ Queue closed\n");
1858 dev_err(dev, "Send error (rc=%d)\n", rc);
1859 }
1860
1861 return rc;
1862}
1863
ad7775dc
TF		 1864static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1865 u64 remote_handle, u64 ioba, u64 num_entries)
1866{
1867 unsigned int ua = adapter->vdev->unit_address;
1868 struct device *dev = &adapter->vdev->dev;
1869 int rc;
1870
1871 /* Make sure the hypervisor sees the complete request */
1872 mb();
1873 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1874 cpu_to_be64(remote_handle),
1875 ioba, num_entries);
1876
1877 if (rc) {
1878 if (rc == H_CLOSED)
1879 dev_warn(dev, "CRQ Queue closed\n");
1880 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1881 }
1882
1883 return rc;
1884}
1885
032c5e82
TF		 1886static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1887 union ibmvnic_crq *crq)
1888{
1889 unsigned int ua = adapter->vdev->unit_address;
1890 struct device *dev = &adapter->vdev->dev;
1891 u64 *u64_crq = (u64 *)crq;
1892 int rc;
1893
1894 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1895 (unsigned long int)cpu_to_be64(u64_crq[0]),
1896 (unsigned long int)cpu_to_be64(u64_crq[1]));
1897
1898 /* Make sure the hypervisor sees the complete request */
1899 mb();
1900
1901 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1902 cpu_to_be64(u64_crq[0]),
1903 cpu_to_be64(u64_crq[1]));
1904
1905 if (rc) {
1906 if (rc == H_CLOSED)
1907 dev_warn(dev, "CRQ Queue closed\n");
1908 dev_warn(dev, "Send error (rc=%d)\n", rc);
1909 }
1910
1911 return rc;
1912}
1913
1914static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1915{
1916 union ibmvnic_crq crq;
1917
1918 memset(&crq, 0, sizeof(crq));
1919 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1920 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1921 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1922
1923 return ibmvnic_send_crq(adapter, &crq);
1924}
1925
1926static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1927{
1928 union ibmvnic_crq crq;
1929
1930 memset(&crq, 0, sizeof(crq));
1931 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1932 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1933 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1934
1935 return ibmvnic_send_crq(adapter, &crq);
1936}
1937
1938static int send_version_xchg(struct ibmvnic_adapter *adapter)
1939{
1940 union ibmvnic_crq crq;
1941
1942 memset(&crq, 0, sizeof(crq));
1943 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1944 crq.version_exchange.cmd = VERSION_EXCHANGE;
1945 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1946
1947 return ibmvnic_send_crq(adapter, &crq);
1948}
1949
1950static void send_login(struct ibmvnic_adapter *adapter)
1951{
1952 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1953 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 1954 struct device *dev = &adapter->vdev->dev;
1955 dma_addr_t rsp_buffer_token;
1956 dma_addr_t buffer_token;
1957 size_t rsp_buffer_size;
1958 union ibmvnic_crq crq;
032c5e82
TF		 1959 size_t buffer_size;
1960 __be64 *tx_list_p;
1961 __be64 *rx_list_p;
1962 int i;
1963
1964 buffer_size =
1965 sizeof(struct ibmvnic_login_buffer) +
1966 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1967
1968 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1969 if (!login_buffer)
1970 goto buf_alloc_failed;
1971
1972 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1973 DMA_TO_DEVICE);
1974 if (dma_mapping_error(dev, buffer_token)) {
1975 dev_err(dev, "Couldn't map login buffer\n");
1976 goto buf_map_failed;
1977 }
1978
498cd8e4
JA		 1979 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1980 sizeof(u64) * adapter->req_tx_queues +
1981 sizeof(u64) * adapter->req_rx_queues +
1982 sizeof(u64) * adapter->req_rx_queues +
1983 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 1984
1985 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1986 if (!login_rsp_buffer)
1987 goto buf_rsp_alloc_failed;
1988
1989 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1990 rsp_buffer_size, DMA_FROM_DEVICE);
1991 if (dma_mapping_error(dev, rsp_buffer_token)) {
1992 dev_err(dev, "Couldn't map login rsp buffer\n");
1993 goto buf_rsp_map_failed;
1994 }
661a2622 1995
032c5e82
TF		 1996 adapter->login_buf = login_buffer;
1997 adapter->login_buf_token = buffer_token;
1998 adapter->login_buf_sz = buffer_size;
1999 adapter->login_rsp_buf = login_rsp_buffer;
2000 adapter->login_rsp_buf_token = rsp_buffer_token;
2001 adapter->login_rsp_buf_sz = rsp_buffer_size;
2002
2003 login_buffer->len = cpu_to_be32(buffer_size);
2004 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2005 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2006 login_buffer->off_txcomp_subcrqs =
2007 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2008 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2009 login_buffer->off_rxcomp_subcrqs =
2010 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2011 sizeof(u64) * adapter->req_tx_queues);
2012 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2013 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2014
2015 tx_list_p = (__be64 *)((char *)login_buffer +
2016 sizeof(struct ibmvnic_login_buffer));
2017 rx_list_p = (__be64 *)((char *)login_buffer +
2018 sizeof(struct ibmvnic_login_buffer) +
2019 sizeof(u64) * adapter->req_tx_queues);
2020
2021 for (i = 0; i < adapter->req_tx_queues; i++) {
2022 if (adapter->tx_scrq[i]) {
2023 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2024 crq_num);
2025 }
2026 }
2027
2028 for (i = 0; i < adapter->req_rx_queues; i++) {
2029 if (adapter->rx_scrq[i]) {
2030 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2031 crq_num);
2032 }
2033 }
2034
2035 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2036 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2037 netdev_dbg(adapter->netdev, "%016lx\n",
2038 ((unsigned long int *)(adapter->login_buf))[i]);
2039 }
2040
2041 memset(&crq, 0, sizeof(crq));
2042 crq.login.first = IBMVNIC_CRQ_CMD;
2043 crq.login.cmd = LOGIN;
2044 crq.login.ioba = cpu_to_be32(buffer_token);
2045 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2046 ibmvnic_send_crq(adapter, &crq);
2047
2048 return;
2049
032c5e82
TF		 2050buf_rsp_map_failed:
2051 kfree(login_rsp_buffer);
2052buf_rsp_alloc_failed:
2053 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2054buf_map_failed:
2055 kfree(login_buffer);
2056buf_alloc_failed:
2057 return;
2058}
2059
2060static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2061 u32 len, u8 map_id)
2062{
2063 union ibmvnic_crq crq;
2064
2065 memset(&crq, 0, sizeof(crq));
2066 crq.request_map.first = IBMVNIC_CRQ_CMD;
2067 crq.request_map.cmd = REQUEST_MAP;
2068 crq.request_map.map_id = map_id;
2069 crq.request_map.ioba = cpu_to_be32(addr);
2070 crq.request_map.len = cpu_to_be32(len);
2071 ibmvnic_send_crq(adapter, &crq);
2072}
2073
2074static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2075{
2076 union ibmvnic_crq crq;
2077
2078 memset(&crq, 0, sizeof(crq));
2079 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2080 crq.request_unmap.cmd = REQUEST_UNMAP;
2081 crq.request_unmap.map_id = map_id;
2082 ibmvnic_send_crq(adapter, &crq);
2083}
2084
2085static void send_map_query(struct ibmvnic_adapter *adapter)
2086{
2087 union ibmvnic_crq crq;
2088
2089 memset(&crq, 0, sizeof(crq));
2090 crq.query_map.first = IBMVNIC_CRQ_CMD;
2091 crq.query_map.cmd = QUERY_MAP;
2092 ibmvnic_send_crq(adapter, &crq);
2093}
2094
2095/* Send a series of CRQs requesting various capabilities of the VNIC server */
2096static void send_cap_queries(struct ibmvnic_adapter *adapter)
2097{
2098 union ibmvnic_crq crq;
2099
901e040a 2100 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2101 memset(&crq, 0, sizeof(crq));
2102 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2103 crq.query_capability.cmd = QUERY_CAPABILITY;
2104
2105 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2106 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2107 ibmvnic_send_crq(adapter, &crq);
2108
2109 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2110 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2111 ibmvnic_send_crq(adapter, &crq);
2112
2113 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2114 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2115 ibmvnic_send_crq(adapter, &crq);
2116
2117 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2118 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2119 ibmvnic_send_crq(adapter, &crq);
2120
2121 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2122 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2123 ibmvnic_send_crq(adapter, &crq);
2124
2125 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2126 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2127 ibmvnic_send_crq(adapter, &crq);
2128
2129 crq.query_capability.capability =
2130 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2131 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2132 ibmvnic_send_crq(adapter, &crq);
2133
2134 crq.query_capability.capability =
2135 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2136 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2137 ibmvnic_send_crq(adapter, &crq);
2138
2139 crq.query_capability.capability =
2140 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2141 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2142 ibmvnic_send_crq(adapter, &crq);
2143
2144 crq.query_capability.capability =
2145 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2146 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2147 ibmvnic_send_crq(adapter, &crq);
2148
2149 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2150 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2151 ibmvnic_send_crq(adapter, &crq);
2152
2153 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2154 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2155 ibmvnic_send_crq(adapter, &crq);
2156
2157 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2158 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2159 ibmvnic_send_crq(adapter, &crq);
2160
2161 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2162 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2163 ibmvnic_send_crq(adapter, &crq);
2164
2165 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2166 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2167 ibmvnic_send_crq(adapter, &crq);
2168
2169 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2170 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2171 ibmvnic_send_crq(adapter, &crq);
2172
2173 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2174 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2175 ibmvnic_send_crq(adapter, &crq);
2176
2177 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2178 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2179 ibmvnic_send_crq(adapter, &crq);
2180
2181 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2182 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2183 ibmvnic_send_crq(adapter, &crq);
2184
2185 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2186 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2187 ibmvnic_send_crq(adapter, &crq);
2188
2189 crq.query_capability.capability =
2190 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2191 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2192 ibmvnic_send_crq(adapter, &crq);
2193
2194 crq.query_capability.capability =
2195 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2196 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2197 ibmvnic_send_crq(adapter, &crq);
2198
2199 crq.query_capability.capability =
2200 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2201 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2202 ibmvnic_send_crq(adapter, &crq);
2203
2204 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2205 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2206 ibmvnic_send_crq(adapter, &crq);
2207}
2208
2209static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2210{
2211 struct device *dev = &adapter->vdev->dev;
2212 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2213 union ibmvnic_crq crq;
2214 int i;
2215
2216 dma_unmap_single(dev, adapter->ip_offload_tok,
2217 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2218
2219 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2220 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2221 netdev_dbg(adapter->netdev, "%016lx\n",
2222 ((unsigned long int *)(buf))[i]);
2223
2224 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2225 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2226 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2227 buf->tcp_ipv4_chksum);
2228 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2229 buf->tcp_ipv6_chksum);
2230 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2231 buf->udp_ipv4_chksum);
2232 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2233 buf->udp_ipv6_chksum);
2234 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2235 buf->large_tx_ipv4);
2236 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2237 buf->large_tx_ipv6);
2238 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2239 buf->large_rx_ipv4);
2240 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2241 buf->large_rx_ipv6);
2242 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2243 buf->max_ipv4_header_size);
2244 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2245 buf->max_ipv6_header_size);
2246 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2247 buf->max_tcp_header_size);
2248 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2249 buf->max_udp_header_size);
2250 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2251 buf->max_large_tx_size);
2252 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2253 buf->max_large_rx_size);
2254 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2255 buf->ipv6_extension_header);
2256 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2257 buf->tcp_pseudosum_req);
2258 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2259 buf->num_ipv6_ext_headers);
2260 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2261 buf->off_ipv6_ext_headers);
2262
2263 adapter->ip_offload_ctrl_tok =
2264 dma_map_single(dev, &adapter->ip_offload_ctrl,
2265 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2266
2267 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2268 dev_err(dev, "Couldn't map ip offload control buffer\n");
2269 return;
2270 }
2271
2272 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2273 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2274 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2275 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2276 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2277
2278 /* large_tx/rx disabled for now, additional features needed */
2279 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2280 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2281 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2282 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2283
2284 adapter->netdev->features = NETIF_F_GSO;
2285
2286 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2287 adapter->netdev->features |= NETIF_F_IP_CSUM;
2288
2289 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2290 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2291
9be02cdf
TF		 2292 if ((adapter->netdev->features &
2293 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2294 adapter->netdev->features |= NETIF_F_RXCSUM;
2295
032c5e82
TF		 2296 memset(&crq, 0, sizeof(crq));
2297 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2298 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2299 crq.control_ip_offload.len =
2300 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2301 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2302 ibmvnic_send_crq(adapter, &crq);
2303}
2304
2305static void handle_error_info_rsp(union ibmvnic_crq *crq,
2306 struct ibmvnic_adapter *adapter)
2307{
2308 struct device *dev = &adapter->vdev->dev;
96183182 2309 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2310 unsigned long flags;
2311 bool found = false;
2312 int i;
2313
2314 if (!crq->request_error_rsp.rc.code) {
2315 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2316 crq->request_error_rsp.rc.code);
2317 return;
2318 }
2319
2320 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2321 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2322 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2323 found = true;
2324 list_del(&error_buff->list);
2325 break;
2326 }
2327 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2328
2329 if (!found) {
2330 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2331 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2332 return;
2333 }
2334
2335 dev_err(dev, "Detailed info for error id %x:",
75224c93 2336 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2337
2338 for (i = 0; i < error_buff->len; i++) {
2339 pr_cont("%02x", (int)error_buff->buff[i]);
2340 if (i % 8 == 7)
2341 pr_cont(" ");
2342 }
2343 pr_cont("\n");
2344
2345 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2346 DMA_FROM_DEVICE);
2347 kfree(error_buff->buff);
2348 kfree(error_buff);
2349}
2350
032c5e82
TF		 2351static void handle_error_indication(union ibmvnic_crq *crq,
2352 struct ibmvnic_adapter *adapter)
2353{
2354 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
032c5e82
TF		 2355 struct device *dev = &adapter->vdev->dev;
2356 struct ibmvnic_error_buff *error_buff;
2357 union ibmvnic_crq new_crq;
2358 unsigned long flags;
2359
2360 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2361 crq->error_indication.
2362 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
75224c93
TF		 2363 be32_to_cpu(crq->error_indication.error_id),
2364 be16_to_cpu(crq->error_indication.error_cause));
032c5e82
TF		 2365
2366 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2367 if (!error_buff)
2368 return;
2369
2370 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2371 if (!error_buff->buff) {
2372 kfree(error_buff);
2373 return;
2374 }
2375
2376 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2377 DMA_FROM_DEVICE);
2378 if (dma_mapping_error(dev, error_buff->dma)) {
2379 if (!firmware_has_feature(FW_FEATURE_CMO))
2380 dev_err(dev, "Couldn't map error buffer\n");
2381 kfree(error_buff->buff);
2382 kfree(error_buff);
2383 return;
2384 }
2385
032c5e82
TF		 2386 error_buff->len = detail_len;
2387 error_buff->error_id = crq->error_indication.error_id;
2388
2389 spin_lock_irqsave(&adapter->error_list_lock, flags);
2390 list_add_tail(&error_buff->list, &adapter->errors);
2391 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2392
2393 memset(&new_crq, 0, sizeof(new_crq));
2394 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2395 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2396 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2397 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2398 new_crq.request_error_info.error_id = crq->error_indication.error_id;
032c5e82
TF		 2399 ibmvnic_send_crq(adapter, &new_crq);
2400}
2401
2402static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2403 struct ibmvnic_adapter *adapter)
2404{
2405 struct net_device *netdev = adapter->netdev;
2406 struct device *dev = &adapter->vdev->dev;
2407 long rc;
2408
2409 rc = crq->change_mac_addr_rsp.rc.code;
2410 if (rc) {
2411 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2412 return;
2413 }
2414 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2415 ETH_ALEN);
2416}
2417
2418static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2419 struct ibmvnic_adapter *adapter)
2420{
2421 struct device *dev = &adapter->vdev->dev;
2422 u64 *req_value;
2423 char *name;
2424
901e040a 2425 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2426 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2427 case REQ_TX_QUEUES:
2428 req_value = &adapter->req_tx_queues;
2429 name = "tx";
2430 break;
2431 case REQ_RX_QUEUES:
2432 req_value = &adapter->req_rx_queues;
2433 name = "rx";
2434 break;
2435 case REQ_RX_ADD_QUEUES:
2436 req_value = &adapter->req_rx_add_queues;
2437 name = "rx_add";
2438 break;
2439 case REQ_TX_ENTRIES_PER_SUBCRQ:
2440 req_value = &adapter->req_tx_entries_per_subcrq;
2441 name = "tx_entries_per_subcrq";
2442 break;
2443 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2444 req_value = &adapter->req_rx_add_entries_per_subcrq;
2445 name = "rx_add_entries_per_subcrq";
2446 break;
2447 case REQ_MTU:
2448 req_value = &adapter->req_mtu;
2449 name = "mtu";
2450 break;
2451 case PROMISC_REQUESTED:
2452 req_value = &adapter->promisc;
2453 name = "promisc";
2454 break;
2455 default:
2456 dev_err(dev, "Got invalid cap request rsp %d\n",
2457 crq->request_capability.capability);
2458 return;
2459 }
2460
2461 switch (crq->request_capability_rsp.rc.code) {
2462 case SUCCESS:
2463 break;
2464 case PARTIALSUCCESS:
2465 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2466 *req_value,
28f4d165 2467 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2468 number), name);
b510888f 2469 release_sub_crqs(adapter);
28f4d165 2470 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
ea22d51a 2471 init_sub_crqs(adapter, 1);
032c5e82
TF		 2472 return;
2473 default:
2474 dev_err(dev, "Error %d in request cap rsp\n",
2475 crq->request_capability_rsp.rc.code);
2476 return;
2477 }
2478
2479 /* Done receiving requested capabilities, query IP offload support */
901e040a 2480 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2481 union ibmvnic_crq newcrq;
2482 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2483 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2484 &adapter->ip_offload_buf;
2485
249168ad 2486 adapter->wait_capability = false;
032c5e82
TF		 2487 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2488 buf_sz,
2489 DMA_FROM_DEVICE);
2490
2491 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2492 if (!firmware_has_feature(FW_FEATURE_CMO))
2493 dev_err(dev, "Couldn't map offload buffer\n");
2494 return;
2495 }
2496
2497 memset(&newcrq, 0, sizeof(newcrq));
2498 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2499 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2500 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2501 newcrq.query_ip_offload.ioba =
2502 cpu_to_be32(adapter->ip_offload_tok);
2503
2504 ibmvnic_send_crq(adapter, &newcrq);
2505 }
2506}
2507
2508static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2509 struct ibmvnic_adapter *adapter)
2510{
2511 struct device *dev = &adapter->vdev->dev;
2512 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2513 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2514 int i;
2515
2516 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2517 DMA_BIDIRECTIONAL);
2518 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2519 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2520
498cd8e4
JA		 2521 /* If the number of queues requested can't be allocated by the
2522 * server, the login response will return with code 1. We will need
2523 * to resend the login buffer with fewer queues requested.
2524 */
2525 if (login_rsp_crq->generic.rc.code) {
2526 adapter->renegotiate = true;
2527 complete(&adapter->init_done);
2528 return 0;
2529 }
2530
032c5e82
TF		 2531 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2532 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2533 netdev_dbg(adapter->netdev, "%016lx\n",
2534 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2535 }
2536
2537 /* Sanity checks */
2538 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2539 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2540 adapter->req_rx_add_queues !=
2541 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2542 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2543 ibmvnic_remove(adapter->vdev);
2544 return -EIO;
2545 }
2546 complete(&adapter->init_done);
2547
032c5e82
TF		 2548 return 0;
2549}
2550
2551static void handle_request_map_rsp(union ibmvnic_crq *crq,
2552 struct ibmvnic_adapter *adapter)
2553{
2554 struct device *dev = &adapter->vdev->dev;
2555 u8 map_id = crq->request_map_rsp.map_id;
2556 int tx_subcrqs;
2557 int rx_subcrqs;
2558 long rc;
2559 int i;
2560
2561 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2562 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2563
2564 rc = crq->request_map_rsp.rc.code;
2565 if (rc) {
2566 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2567 adapter->map_id--;
2568 /* need to find and zero tx/rx_pool map_id */
2569 for (i = 0; i < tx_subcrqs; i++) {
2570 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2571 adapter->tx_pool[i].long_term_buff.map_id = 0;
2572 }
2573 for (i = 0; i < rx_subcrqs; i++) {
2574 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2575 adapter->rx_pool[i].long_term_buff.map_id = 0;
2576 }
2577 }
2578 complete(&adapter->fw_done);
2579}
2580
2581static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2582 struct ibmvnic_adapter *adapter)
2583{
2584 struct device *dev = &adapter->vdev->dev;
2585 long rc;
2586
2587 rc = crq->request_unmap_rsp.rc.code;
2588 if (rc)
2589 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2590}
2591
2592static void handle_query_map_rsp(union ibmvnic_crq *crq,
2593 struct ibmvnic_adapter *adapter)
2594{
2595 struct net_device *netdev = adapter->netdev;
2596 struct device *dev = &adapter->vdev->dev;
2597 long rc;
2598
2599 rc = crq->query_map_rsp.rc.code;
2600 if (rc) {
2601 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2602 return;
2603 }
2604 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2605 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2606 crq->query_map_rsp.free_pages);
2607}
2608
2609static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2610 struct ibmvnic_adapter *adapter)
2611{
2612 struct net_device *netdev = adapter->netdev;
2613 struct device *dev = &adapter->vdev->dev;
2614 long rc;
2615
901e040a 2616 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2617 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2618 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2619 rc = crq->query_capability.rc.code;
2620 if (rc) {
2621 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2622 goto out;
2623 }
2624
2625 switch (be16_to_cpu(crq->query_capability.capability)) {
2626 case MIN_TX_QUEUES:
2627 adapter->min_tx_queues =
de89e854 2628 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2629 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2630 adapter->min_tx_queues);
2631 break;
2632 case MIN_RX_QUEUES:
2633 adapter->min_rx_queues =
de89e854 2634 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2635 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2636 adapter->min_rx_queues);
2637 break;
2638 case MIN_RX_ADD_QUEUES:
2639 adapter->min_rx_add_queues =
de89e854 2640 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2641 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2642 adapter->min_rx_add_queues);
2643 break;
2644 case MAX_TX_QUEUES:
2645 adapter->max_tx_queues =
de89e854 2646 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2647 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2648 adapter->max_tx_queues);
2649 break;
2650 case MAX_RX_QUEUES:
2651 adapter->max_rx_queues =
de89e854 2652 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2653 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2654 adapter->max_rx_queues);
2655 break;
2656 case MAX_RX_ADD_QUEUES:
2657 adapter->max_rx_add_queues =
de89e854 2658 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2659 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2660 adapter->max_rx_add_queues);
2661 break;
2662 case MIN_TX_ENTRIES_PER_SUBCRQ:
2663 adapter->min_tx_entries_per_subcrq =
de89e854 2664 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2665 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2666 adapter->min_tx_entries_per_subcrq);
2667 break;
2668 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2669 adapter->min_rx_add_entries_per_subcrq =
de89e854 2670 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2671 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2672 adapter->min_rx_add_entries_per_subcrq);
2673 break;
2674 case MAX_TX_ENTRIES_PER_SUBCRQ:
2675 adapter->max_tx_entries_per_subcrq =
de89e854 2676 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2677 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2678 adapter->max_tx_entries_per_subcrq);
2679 break;
2680 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2681 adapter->max_rx_add_entries_per_subcrq =
de89e854 2682 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2683 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2684 adapter->max_rx_add_entries_per_subcrq);
2685 break;
2686 case TCP_IP_OFFLOAD:
2687 adapter->tcp_ip_offload =
de89e854 2688 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2689 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2690 adapter->tcp_ip_offload);
2691 break;
2692 case PROMISC_SUPPORTED:
2693 adapter->promisc_supported =
de89e854 2694 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2695 netdev_dbg(netdev, "promisc_supported = %lld\n",
2696 adapter->promisc_supported);
2697 break;
2698 case MIN_MTU:
de89e854 2699 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 2700 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 2701 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2702 break;
2703 case MAX_MTU:
de89e854 2704 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 2705 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 2706 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2707 break;
2708 case MAX_MULTICAST_FILTERS:
2709 adapter->max_multicast_filters =
de89e854 2710 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2711 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2712 adapter->max_multicast_filters);
2713 break;
2714 case VLAN_HEADER_INSERTION:
2715 adapter->vlan_header_insertion =
de89e854 2716 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2717 if (adapter->vlan_header_insertion)
2718 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2719 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2720 adapter->vlan_header_insertion);
2721 break;
2722 case MAX_TX_SG_ENTRIES:
2723 adapter->max_tx_sg_entries =
de89e854 2724 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2725 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2726 adapter->max_tx_sg_entries);
2727 break;
2728 case RX_SG_SUPPORTED:
2729 adapter->rx_sg_supported =
de89e854 2730 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2731 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2732 adapter->rx_sg_supported);
2733 break;
2734 case OPT_TX_COMP_SUB_QUEUES:
2735 adapter->opt_tx_comp_sub_queues =
de89e854 2736 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2737 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2738 adapter->opt_tx_comp_sub_queues);
2739 break;
2740 case OPT_RX_COMP_QUEUES:
2741 adapter->opt_rx_comp_queues =
de89e854 2742 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2743 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2744 adapter->opt_rx_comp_queues);
2745 break;
2746 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2747 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 2748 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2749 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2750 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2751 break;
2752 case OPT_TX_ENTRIES_PER_SUBCRQ:
2753 adapter->opt_tx_entries_per_subcrq =
de89e854 2754 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2755 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2756 adapter->opt_tx_entries_per_subcrq);
2757 break;
2758 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2759 adapter->opt_rxba_entries_per_subcrq =
de89e854 2760 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2761 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2762 adapter->opt_rxba_entries_per_subcrq);
2763 break;
2764 case TX_RX_DESC_REQ:
2765 adapter->tx_rx_desc_req = crq->query_capability.number;
2766 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2767 adapter->tx_rx_desc_req);
2768 break;
2769
2770 default:
2771 netdev_err(netdev, "Got invalid cap rsp %d\n",
2772 crq->query_capability.capability);
2773 }
2774
2775out:
249168ad
TF		 2776 if (atomic_read(&adapter->running_cap_crqs) == 0) {
2777 adapter->wait_capability = false;
ea22d51a 2778 init_sub_crqs(adapter, 0);
032c5e82 2779 /* We're done querying the capabilities, initialize sub-crqs */
249168ad 2780 }
032c5e82
TF		 2781}
2782
9888d7b0
TF		 2783static void ibmvnic_xport_event(struct work_struct *work)
2784{
2785 struct ibmvnic_adapter *adapter = container_of(work,
2786 struct ibmvnic_adapter,
2787 ibmvnic_xport);
2788 struct device *dev = &adapter->vdev->dev;
2789 long rc;
2790
9888d7b0
TF		 2791 release_sub_crqs(adapter);
2792 if (adapter->migrated) {
2793 rc = ibmvnic_reenable_crq_queue(adapter);
2794 if (rc)
2795 dev_err(dev, "Error after enable rc=%ld\n", rc);
2796 adapter->migrated = false;
2797 rc = ibmvnic_send_crq_init(adapter);
2798 if (rc)
2799 dev_err(dev, "Error sending init rc=%ld\n", rc);
2800 }
2801}
2802
032c5e82
TF		 2803static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2804 struct ibmvnic_adapter *adapter)
2805{
2806 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2807 struct net_device *netdev = adapter->netdev;
2808 struct device *dev = &adapter->vdev->dev;
993a82b0 2809 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 2810 long rc;
2811
2812 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 2813 (unsigned long int)cpu_to_be64(u64_crq[0]),
2814 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 2815 switch (gen_crq->first) {
2816 case IBMVNIC_CRQ_INIT_RSP:
2817 switch (gen_crq->cmd) {
2818 case IBMVNIC_CRQ_INIT:
2819 dev_info(dev, "Partner initialized\n");
2820 /* Send back a response */
2821 rc = ibmvnic_send_crq_init_complete(adapter);
65dc6891
TF		 2822 if (!rc)
2823 schedule_work(&adapter->vnic_crq_init);
032c5e82
TF		 2824 else
2825 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
2826 break;
2827 case IBMVNIC_CRQ_INIT_COMPLETE:
2828 dev_info(dev, "Partner initialization complete\n");
2829 send_version_xchg(adapter);
2830 break;
2831 default:
2832 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
2833 }
2834 return;
2835 case IBMVNIC_CRQ_XPORT_EVENT:
2836 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
2837 dev_info(dev, "Re-enabling adapter\n");
2838 adapter->migrated = true;
9888d7b0 2839 schedule_work(&adapter->ibmvnic_xport);
dfad09a6
TF		 2840 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
2841 dev_info(dev, "Backing device failover detected\n");
2842 netif_carrier_off(netdev);
2843 adapter->failover = true;
032c5e82
TF		 2844 } else {
2845 /* The adapter lost the connection */
2846 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
2847 gen_crq->cmd);
9888d7b0 2848 schedule_work(&adapter->ibmvnic_xport);
032c5e82
TF		 2849 }
2850 return;
2851 case IBMVNIC_CRQ_CMD_RSP:
2852 break;
2853 default:
2854 dev_err(dev, "Got an invalid msg type 0x%02x\n",
2855 gen_crq->first);
2856 return;
2857 }
2858
2859 switch (gen_crq->cmd) {
2860 case VERSION_EXCHANGE_RSP:
2861 rc = crq->version_exchange_rsp.rc.code;
2862 if (rc) {
2863 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
2864 break;
2865 }
2866 dev_info(dev, "Partner protocol version is %d\n",
2867 crq->version_exchange_rsp.version);
2868 if (be16_to_cpu(crq->version_exchange_rsp.version) <
2869 ibmvnic_version)
2870 ibmvnic_version =
2871 be16_to_cpu(crq->version_exchange_rsp.version);
2872 send_cap_queries(adapter);
2873 break;
2874 case QUERY_CAPABILITY_RSP:
2875 handle_query_cap_rsp(crq, adapter);
2876 break;
2877 case QUERY_MAP_RSP:
2878 handle_query_map_rsp(crq, adapter);
2879 break;
2880 case REQUEST_MAP_RSP:
2881 handle_request_map_rsp(crq, adapter);
2882 break;
2883 case REQUEST_UNMAP_RSP:
2884 handle_request_unmap_rsp(crq, adapter);
2885 break;
2886 case REQUEST_CAPABILITY_RSP:
2887 handle_request_cap_rsp(crq, adapter);
2888 break;
2889 case LOGIN_RSP:
2890 netdev_dbg(netdev, "Got Login Response\n");
2891 handle_login_rsp(crq, adapter);
2892 break;
2893 case LOGICAL_LINK_STATE_RSP:
2894 netdev_dbg(netdev, "Got Logical Link State Response\n");
2895 adapter->logical_link_state =
2896 crq->logical_link_state_rsp.link_state;
2897 break;
2898 case LINK_STATE_INDICATION:
2899 netdev_dbg(netdev, "Got Logical Link State Indication\n");
2900 adapter->phys_link_state =
2901 crq->link_state_indication.phys_link_state;
2902 adapter->logical_link_state =
2903 crq->link_state_indication.logical_link_state;
2904 break;
2905 case CHANGE_MAC_ADDR_RSP:
2906 netdev_dbg(netdev, "Got MAC address change Response\n");
2907 handle_change_mac_rsp(crq, adapter);
2908 break;
2909 case ERROR_INDICATION:
2910 netdev_dbg(netdev, "Got Error Indication\n");
2911 handle_error_indication(crq, adapter);
2912 break;
2913 case REQUEST_ERROR_RSP:
2914 netdev_dbg(netdev, "Got Error Detail Response\n");
2915 handle_error_info_rsp(crq, adapter);
2916 break;
2917 case REQUEST_STATISTICS_RSP:
2918 netdev_dbg(netdev, "Got Statistics Response\n");
2919 complete(&adapter->stats_done);
2920 break;
032c5e82
TF		 2921 case QUERY_IP_OFFLOAD_RSP:
2922 netdev_dbg(netdev, "Got Query IP offload Response\n");
2923 handle_query_ip_offload_rsp(adapter);
2924 break;
2925 case MULTICAST_CTRL_RSP:
2926 netdev_dbg(netdev, "Got multicast control Response\n");
2927 break;
2928 case CONTROL_IP_OFFLOAD_RSP:
2929 netdev_dbg(netdev, "Got Control IP offload Response\n");
2930 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
2931 sizeof(adapter->ip_offload_ctrl),
2932 DMA_TO_DEVICE);
bd0b6723 2933 complete(&adapter->init_done);
032c5e82 2934 break;
032c5e82
TF		 2935 case COLLECT_FW_TRACE_RSP:
2936 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
2937 complete(&adapter->fw_done);
2938 break;
2939 default:
2940 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
2941 gen_crq->cmd);
2942 }
2943}
2944
2945static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
2946{
2947 struct ibmvnic_adapter *adapter = instance;
6c267b3d 2948
6c267b3d 2949 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 2950 return IRQ_HANDLED;
2951}
2952
2953static void ibmvnic_tasklet(void *data)
2954{
2955 struct ibmvnic_adapter *adapter = data;
032c5e82 2956 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 2957 union ibmvnic_crq *crq;
2958 unsigned long flags;
2959 bool done = false;
2960
2961 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 2962 while (!done) {
2963 /* Pull all the valid messages off the CRQ */
2964 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
2965 ibmvnic_handle_crq(crq, adapter);
2966 crq->generic.first = 0;
2967 }
ed7ecbf7
BK		 2968
2969 /* remain in tasklet until all
2970 * capabilities responses are received
2971 */
2972 if (!adapter->wait_capability)
2973 done = true;
032c5e82 2974 }
249168ad
TF		 2975 /* if capabilities CRQ's were sent in this tasklet, the following
2976 * tasklet must wait until all responses are received
2977 */
2978 if (atomic_read(&adapter->running_cap_crqs) != 0)
2979 adapter->wait_capability = true;
032c5e82 2980 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 2981}
2982
2983static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
2984{
2985 struct vio_dev *vdev = adapter->vdev;
2986 int rc;
2987
2988 do {
2989 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
2990 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
2991
2992 if (rc)
2993 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
2994
2995 return rc;
2996}
2997
2998static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
2999{
3000 struct ibmvnic_crq_queue *crq = &adapter->crq;
3001 struct device *dev = &adapter->vdev->dev;
3002 struct vio_dev *vdev = adapter->vdev;
3003 int rc;
3004
3005 /* Close the CRQ */
3006 do {
3007 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3008 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3009
3010 /* Clean out the queue */
3011 memset(crq->msgs, 0, PAGE_SIZE);
3012 crq->cur = 0;
3013
3014 /* And re-open it again */
3015 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3016 crq->msg_token, PAGE_SIZE);
3017
3018 if (rc == H_CLOSED)
3019 /* Adapter is good, but other end is not ready */
3020 dev_warn(dev, "Partner adapter not ready\n");
3021 else if (rc != 0)
3022 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3023
3024 return rc;
3025}
3026
f992887c 3027static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3028{
3029 struct ibmvnic_crq_queue *crq = &adapter->crq;
3030 struct vio_dev *vdev = adapter->vdev;
3031 long rc;
3032
f992887c
NF		 3033 if (!crq->msgs)
3034 return;
3035
032c5e82
TF		 3036 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3037 free_irq(vdev->irq, adapter);
6c267b3d 3038 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3039 do {
3040 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3041 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3042
3043 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3044 DMA_BIDIRECTIONAL);
3045 free_page((unsigned long)crq->msgs);
f992887c 3046 crq->msgs = NULL;
032c5e82
TF		 3047}
3048
f992887c 3049static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3050{
3051 struct ibmvnic_crq_queue *crq = &adapter->crq;
3052 struct device *dev = &adapter->vdev->dev;
3053 struct vio_dev *vdev = adapter->vdev;
3054 int rc, retrc = -ENOMEM;
3055
f992887c
NF		 3056 if (crq->msgs)
3057 return 0;
3058
032c5e82
TF		 3059 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3060 /* Should we allocate more than one page? */
3061
3062 if (!crq->msgs)
3063 return -ENOMEM;
3064
3065 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3066 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3067 DMA_BIDIRECTIONAL);
3068 if (dma_mapping_error(dev, crq->msg_token))
3069 goto map_failed;
3070
3071 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3072 crq->msg_token, PAGE_SIZE);
3073
3074 if (rc == H_RESOURCE)
3075 /* maybe kexecing and resource is busy. try a reset */
3076 rc = ibmvnic_reset_crq(adapter);
3077 retrc = rc;
3078
3079 if (rc == H_CLOSED) {
3080 dev_warn(dev, "Partner adapter not ready\n");
3081 } else if (rc) {
3082 dev_warn(dev, "Error %d opening adapter\n", rc);
3083 goto reg_crq_failed;
3084 }
3085
3086 retrc = 0;
3087
6c267b3d
TF		 3088 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3089 (unsigned long)adapter);
3090
032c5e82
TF		 3091 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3092 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3093 adapter);
3094 if (rc) {
3095 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3096 vdev->irq, rc);
3097 goto req_irq_failed;
3098 }
3099
3100 rc = vio_enable_interrupts(vdev);
3101 if (rc) {
3102 dev_err(dev, "Error %d enabling interrupts\n", rc);
3103 goto req_irq_failed;
3104 }
3105
3106 crq->cur = 0;
3107 spin_lock_init(&crq->lock);
3108
3109 return retrc;
3110
3111req_irq_failed:
6c267b3d 3112 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3113 do {
3114 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3115 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3116reg_crq_failed:
3117 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3118map_failed:
3119 free_page((unsigned long)crq->msgs);
f992887c 3120 crq->msgs = NULL;
032c5e82
TF		 3121 return retrc;
3122}
3123
65dc6891
TF		 3124static void handle_crq_init_rsp(struct work_struct *work)
3125{
3126 struct ibmvnic_adapter *adapter = container_of(work,
3127 struct ibmvnic_adapter,
3128 vnic_crq_init);
3129 struct device *dev = &adapter->vdev->dev;
3130 struct net_device *netdev = adapter->netdev;
3131 unsigned long timeout = msecs_to_jiffies(30000);
dfad09a6 3132 bool restart = false;
65dc6891
TF		 3133 int rc;
3134
dfad09a6
TF		 3135 if (adapter->failover) {
3136 release_sub_crqs(adapter);
3137 if (netif_running(netdev)) {
3138 netif_tx_disable(netdev);
3139 ibmvnic_close(netdev);
3140 restart = true;
3141 }
3142 }
3143
65dc6891 3144 reinit_completion(&adapter->init_done);
db5d0b59 3145 send_version_xchg(adapter);
65dc6891
TF		 3146 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3147 dev_err(dev, "Passive init timeout\n");
3148 goto task_failed;
3149 }
3150
f39f0d1e 3151 netdev->mtu = adapter->req_mtu - ETH_HLEN;
65dc6891 3152
dfad09a6
TF		 3153 if (adapter->failover) {
3154 adapter->failover = false;
3155 if (restart) {
3156 rc = ibmvnic_open(netdev);
3157 if (rc)
3158 goto restart_failed;
3159 }
3160 netif_carrier_on(netdev);
3161 return;
3162 }
3163
65dc6891
TF		 3164 rc = register_netdev(netdev);
3165 if (rc) {
3166 dev_err(dev,
3167 "failed to register netdev rc=%d\n", rc);
3168 goto register_failed;
3169 }
3170 dev_info(dev, "ibmvnic registered\n");
3171
3172 return;
3173
dfad09a6
TF		 3174restart_failed:
3175 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
65dc6891
TF		 3176register_failed:
3177 release_sub_crqs(adapter);
3178task_failed:
3179 dev_err(dev, "Passive initialization was not successful\n");
3180}
3181
f6ef6408 3182static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3183{
f6ef6408 3184 struct device *dev = &adapter->vdev->dev;
ea22d51a 3185 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3186 int rc;
3187
f992887c 3188 rc = init_crq_queue(adapter);
f6ef6408
JA		 3189 if (rc) {
3190 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3191 return rc;
3192 }
3193
7bbc27a4
NF		 3194 rc = init_stats_token(adapter);
3195 if (rc) {
f992887c 3196 release_crq_queue(adapter);
7bbc27a4 3197 return rc;
f6ef6408
JA		 3198 }
3199
f6ef6408
JA		 3200 init_completion(&adapter->init_done);
3201 ibmvnic_send_crq_init(adapter);
3202 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3203 dev_err(dev, "Initialization sequence timed out\n");
f992887c 3204 release_crq_queue(adapter);
f6ef6408
JA		 3205 return -1;
3206 }
3207
3208 return 0;
3209}
3210
3211static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3212{
032c5e82
TF		 3213 struct ibmvnic_adapter *adapter;
3214 struct net_device *netdev;
3215 unsigned char *mac_addr_p;
032c5e82
TF		 3216 int rc;
3217
3218 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3219 dev->unit_address);
3220
3221 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3222 VETH_MAC_ADDR, NULL);
3223 if (!mac_addr_p) {
3224 dev_err(&dev->dev,
3225 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3226 __FILE__, __LINE__);
3227 return 0;
3228 }
3229
3230 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3231 IBMVNIC_MAX_TX_QUEUES);
3232 if (!netdev)
3233 return -ENOMEM;
3234
3235 adapter = netdev_priv(netdev);
3236 dev_set_drvdata(&dev->dev, netdev);
3237 adapter->vdev = dev;
3238 adapter->netdev = netdev;
dfad09a6 3239 adapter->failover = false;
032c5e82
TF		 3240
3241 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3242 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3243 netdev->irq = dev->irq;
3244 netdev->netdev_ops = &ibmvnic_netdev_ops;
3245 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3246 SET_NETDEV_DEV(netdev, &dev->dev);
3247
65dc6891 3248 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
9888d7b0 3249 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
65dc6891 3250
032c5e82
TF		 3251 spin_lock_init(&adapter->stats_lock);
3252
032c5e82 3253 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3254 spin_lock_init(&adapter->error_list_lock);
032c5e82 3255
f6ef6408
JA		 3256 rc = ibmvnic_init(adapter);
3257 if (rc) {
3258 free_netdev(netdev);
3259 return rc;
032c5e82 3260 }
032c5e82 3261
f39f0d1e 3262 netdev->mtu = adapter->req_mtu - ETH_HLEN;
ea5509f5 3263 adapter->is_closed = false;
032c5e82
TF		 3264
3265 rc = register_netdev(netdev);
3266 if (rc) {
3267 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3268 free_netdev(netdev);
3269 return rc;
032c5e82
TF		 3270 }
3271 dev_info(&dev->dev, "ibmvnic registered\n");
3272
3273 return 0;
032c5e82
TF		 3274}
3275
3276static int ibmvnic_remove(struct vio_dev *dev)
3277{
3278 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3279 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82
TF		 3280
3281 unregister_netdev(netdev);
37489055
NF		 3282
3283 release_resources(adapter);
3284 release_sub_crqs(adapter);
3285 release_crq_queue(adapter);
3286
032c5e82
TF		 3287 free_netdev(netdev);
3288 dev_set_drvdata(&dev->dev, NULL);
3289
3290 return 0;
3291}
3292
3293static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3294{
3295 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3296 struct ibmvnic_adapter *adapter;
3297 struct iommu_table *tbl;
3298 unsigned long ret = 0;
3299 int i;
3300
3301 tbl = get_iommu_table_base(&vdev->dev);
3302
3303 /* netdev inits at probe time along with the structures we need below*/
3304 if (!netdev)
3305 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3306
3307 adapter = netdev_priv(netdev);
3308
3309 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3310 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3311
3312 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3313 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3314
3315 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3316 i++)
3317 ret += adapter->rx_pool[i].size *
3318 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3319
3320 return ret;
3321}
3322
3323static int ibmvnic_resume(struct device *dev)
3324{
3325 struct net_device *netdev = dev_get_drvdata(dev);
3326 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3327 int i;
3328
3329 /* kick the interrupt handlers just in case we lost an interrupt */
3330 for (i = 0; i < adapter->req_rx_queues; i++)
3331 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3332 adapter->rx_scrq[i]);
3333
3334 return 0;
3335}
3336
3337static struct vio_device_id ibmvnic_device_table[] = {
3338 {"network", "IBM,vnic"},
3339 {"", "" }
3340};
3341MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3342
3343static const struct dev_pm_ops ibmvnic_pm_ops = {
3344 .resume = ibmvnic_resume
3345};
3346
3347static struct vio_driver ibmvnic_driver = {
3348 .id_table = ibmvnic_device_table,
3349 .probe = ibmvnic_probe,
3350 .remove = ibmvnic_remove,
3351 .get_desired_dma = ibmvnic_get_desired_dma,
3352 .name = ibmvnic_driver_name,
3353 .pm = &ibmvnic_pm_ops,
3354};
3355
3356/* module functions */
3357static int __init ibmvnic_module_init(void)
3358{
3359 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3360 IBMVNIC_DRIVER_VERSION);
3361
3362 return vio_register_driver(&ibmvnic_driver);
3363}
3364
3365static void __exit ibmvnic_module_exit(void)
3366{
3367 vio_unregister_driver(&ibmvnic_driver);
3368}
3369
3370module_init(ibmvnic_module_init);
3371module_exit(ibmvnic_module_exit);
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