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ibmvnic: Fix ibmvnic_change_mac_addr struct format
[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
032c5e82 196 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
dfad09a6
TF		 197 if (!adapter->failover)
198 send_request_unmap(adapter, ltb->map_id);
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
f0b8c96c
NF		 505static void release_bounce_buffer(struct ibmvnic_adapter *adapter)
506{
507 struct device *dev = &adapter->vdev->dev;
508
509 if (!adapter->bounce_buffer)
510 return;
511
512 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
513 dma_unmap_single(dev, adapter->bounce_buffer_dma,
514 adapter->bounce_buffer_size,
515 DMA_BIDIRECTIONAL);
516 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
517 }
518
519 kfree(adapter->bounce_buffer);
520 adapter->bounce_buffer = NULL;
521}
522
523static int init_bounce_buffer(struct net_device *netdev)
524{
525 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
526 struct device *dev = &adapter->vdev->dev;
527 char *buf;
528 int buf_sz;
529 dma_addr_t map_addr;
530
531 buf_sz = (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
532 buf = kmalloc(adapter->bounce_buffer_size, GFP_KERNEL);
533 if (!buf)
534 return -1;
535
536 map_addr = dma_map_single(dev, buf, buf_sz, DMA_TO_DEVICE);
537 if (dma_mapping_error(dev, map_addr)) {
538 dev_err(dev, "Couldn't map bounce buffer\n");
539 kfree(buf);
540 return -1;
541 }
542
543 adapter->bounce_buffer = buf;
544 adapter->bounce_buffer_size = buf_sz;
545 adapter->bounce_buffer_dma = map_addr;
546 return 0;
547}
548
a57a5d25 549static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 550{
551 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 552 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 553 struct device *dev = &adapter->vdev->dev;
032c5e82 554
bd0b6723
JA		 555 do {
556 if (adapter->renegotiate) {
557 adapter->renegotiate = false;
b510888f 558 release_sub_crqs(adapter);
bd0b6723
JA		 559
560 reinit_completion(&adapter->init_done);
561 send_cap_queries(adapter);
562 if (!wait_for_completion_timeout(&adapter->init_done,
563 timeout)) {
564 dev_err(dev, "Capabilities query timeout\n");
565 return -1;
566 }
567 }
568
569 reinit_completion(&adapter->init_done);
570 send_login(adapter);
571 if (!wait_for_completion_timeout(&adapter->init_done,
572 timeout)) {
573 dev_err(dev, "Login timeout\n");
574 return -1;
575 }
576 } while (adapter->renegotiate);
577
a57a5d25
JA		 578 return 0;
579}
580
1b8955ee
NF		 581static void release_resources(struct ibmvnic_adapter *adapter)
582{
583 release_bounce_buffer(adapter);
584 release_tx_pools(adapter);
585 release_rx_pools(adapter);
586
587 release_sub_crqs(adapter);
588 release_crq_queue(adapter);
589
590 release_stats_token(adapter);
591}
592
a57a5d25
JA		 593static int ibmvnic_open(struct net_device *netdev)
594{
595 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
596 struct device *dev = &adapter->vdev->dev;
a57a5d25 597 union ibmvnic_crq crq;
a57a5d25 598 int rc = 0;
0ffe2cb7 599 int i;
a57a5d25 600
ea5509f5
JA		 601 if (adapter->is_closed) {
602 rc = ibmvnic_init(adapter);
603 if (rc)
604 return rc;
605 }
606
a57a5d25
JA		 607 rc = ibmvnic_login(netdev);
608 if (rc)
609 return rc;
610
bd0b6723
JA		 611 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
612 if (rc) {
613 dev_err(dev, "failed to set the number of tx queues\n");
614 return -1;
615 }
616
617 rc = init_sub_crq_irqs(adapter);
618 if (rc) {
619 dev_err(dev, "failed to initialize sub crq irqs\n");
620 return -1;
621 }
622
032c5e82
TF		 623 adapter->map_id = 1;
624 adapter->napi = kcalloc(adapter->req_rx_queues,
625 sizeof(struct napi_struct), GFP_KERNEL);
626 if (!adapter->napi)
1b8955ee 627 goto ibmvnic_open_fail;
032c5e82
TF		 628 for (i = 0; i < adapter->req_rx_queues; i++) {
629 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
630 NAPI_POLL_WEIGHT);
631 napi_enable(&adapter->napi[i]);
632 }
032c5e82 633
032c5e82 634 send_map_query(adapter);
0ffe2cb7
NF		 635
636 rc = init_rx_pools(netdev);
637 if (rc)
1b8955ee 638 goto ibmvnic_open_fail;
032c5e82 639
c657e32c
NF		 640 rc = init_tx_pools(netdev);
641 if (rc)
1b8955ee 642 goto ibmvnic_open_fail;
f0b8c96c
NF		 643
644 rc = init_bounce_buffer(netdev);
645 if (rc)
1b8955ee 646 goto ibmvnic_open_fail;
f0b8c96c 647
032c5e82
TF		 648 replenish_pools(adapter);
649
650 /* We're ready to receive frames, enable the sub-crq interrupts and
651 * set the logical link state to up
652 */
653 for (i = 0; i < adapter->req_rx_queues; i++)
654 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
655
656 for (i = 0; i < adapter->req_tx_queues; i++)
657 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
658
659 memset(&crq, 0, sizeof(crq));
660 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
661 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
662 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
663 ibmvnic_send_crq(adapter, &crq);
664
b8efb894 665 netif_tx_start_all_queues(netdev);
ea5509f5 666 adapter->is_closed = false;
b8efb894 667
032c5e82
TF		 668 return 0;
669
1b8955ee 670ibmvnic_open_fail:
032c5e82 671 for (i = 0; i < adapter->req_rx_queues; i++)
e722af63 672 napi_disable(&adapter->napi[i]);
1b8955ee 673 release_resources(adapter);
032c5e82
TF		 674 return -ENOMEM;
675}
676
ea5509f5
JA		 677static int ibmvnic_close(struct net_device *netdev)
678{
679 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
680 union ibmvnic_crq crq;
681 int i;
682
683 adapter->closing = true;
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;
850 bool used_bounce = false;
851 unsigned long lpar_rc;
852 union sub_crq tx_crq;
853 unsigned int offset;
ad7775dc 854 int num_entries = 1;
032c5e82
TF		 855 unsigned char *dst;
856 u64 *handle_array;
857 int index = 0;
858 int ret = 0;
859
860 tx_pool = &adapter->tx_pool[queue_num];
142c0ac4 861 tx_scrq = adapter->tx_scrq[queue_num];
032c5e82
TF		 862 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
863 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
864 be32_to_cpu(adapter->login_rsp_buf->
865 off_txsubm_subcrqs));
866 if (adapter->migrated) {
867 tx_send_failed++;
868 tx_dropped++;
869 ret = NETDEV_TX_BUSY;
870 goto out;
871 }
872
873 index = tx_pool->free_map[tx_pool->consumer_index];
874 offset = index * adapter->req_mtu;
875 dst = tx_pool->long_term_buff.buff + offset;
876 memset(dst, 0, adapter->req_mtu);
877 skb_copy_from_linear_data(skb, dst, skb->len);
878 data_dma_addr = tx_pool->long_term_buff.addr + offset;
879
880 tx_pool->consumer_index =
881 (tx_pool->consumer_index + 1) %
068d9f90 882 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 883
884 tx_buff = &tx_pool->tx_buff[index];
885 tx_buff->skb = skb;
886 tx_buff->data_dma[0] = data_dma_addr;
887 tx_buff->data_len[0] = skb->len;
888 tx_buff->index = index;
889 tx_buff->pool_index = queue_num;
890 tx_buff->last_frag = true;
891 tx_buff->used_bounce = used_bounce;
892
893 memset(&tx_crq, 0, sizeof(tx_crq));
894 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
895 tx_crq.v1.type = IBMVNIC_TX_DESC;
896 tx_crq.v1.n_crq_elem = 1;
897 tx_crq.v1.n_sge = 1;
898 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
899 tx_crq.v1.correlator = cpu_to_be32(index);
900 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
901 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
902 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
903
904 if (adapter->vlan_header_insertion) {
905 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
906 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
907 }
908
909 if (skb->protocol == htons(ETH_P_IP)) {
910 if (ip_hdr(skb)->version == 4)
911 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
912 else if (ip_hdr(skb)->version == 6)
913 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
914
915 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
916 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
917 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
918 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
919 }
920
ad7775dc 921 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 922 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 923 hdrs += 2;
924 }
925 /* determine if l2/3/4 headers are sent to firmware */
926 if ((*hdrs >> 7) & 1 &&
927 (skb->protocol == htons(ETH_P_IP) ||
928 skb->protocol == htons(ETH_P_IPV6))) {
929 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
930 tx_crq.v1.n_crq_elem = num_entries;
931 tx_buff->indir_arr[0] = tx_crq;
932 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
933 sizeof(tx_buff->indir_arr),
934 DMA_TO_DEVICE);
935 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
936 if (!firmware_has_feature(FW_FEATURE_CMO))
937 dev_err(dev, "tx: unable to map descriptor array\n");
938 tx_map_failed++;
939 tx_dropped++;
940 ret = NETDEV_TX_BUSY;
941 goto out;
942 }
498cd8e4 943 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 944 (u64)tx_buff->indir_dma,
945 (u64)num_entries);
946 } else {
498cd8e4
JA		 947 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
948 &tx_crq);
ad7775dc 949 }
032c5e82
TF		 950 if (lpar_rc != H_SUCCESS) {
951 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
952
953 if (tx_pool->consumer_index == 0)
954 tx_pool->consumer_index =
068d9f90 955 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 956 else
957 tx_pool->consumer_index--;
958
959 tx_send_failed++;
960 tx_dropped++;
961 ret = NETDEV_TX_BUSY;
962 goto out;
963 }
142c0ac4
TF		 964
965 atomic_inc(&tx_scrq->used);
966
967 if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) {
968 netdev_info(netdev, "Stopping queue %d\n", queue_num);
969 netif_stop_subqueue(netdev, queue_num);
970 }
971
032c5e82
TF		 972 tx_packets++;
973 tx_bytes += skb->len;
974 txq->trans_start = jiffies;
975 ret = NETDEV_TX_OK;
976
977out:
978 netdev->stats.tx_dropped += tx_dropped;
979 netdev->stats.tx_bytes += tx_bytes;
980 netdev->stats.tx_packets += tx_packets;
981 adapter->tx_send_failed += tx_send_failed;
982 adapter->tx_map_failed += tx_map_failed;
983
984 return ret;
985}
986
987static void ibmvnic_set_multi(struct net_device *netdev)
988{
989 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
990 struct netdev_hw_addr *ha;
991 union ibmvnic_crq crq;
992
993 memset(&crq, 0, sizeof(crq));
994 crq.request_capability.first = IBMVNIC_CRQ_CMD;
995 crq.request_capability.cmd = REQUEST_CAPABILITY;
996
997 if (netdev->flags & IFF_PROMISC) {
998 if (!adapter->promisc_supported)
999 return;
1000 } else {
1001 if (netdev->flags & IFF_ALLMULTI) {
1002 /* Accept all multicast */
1003 memset(&crq, 0, sizeof(crq));
1004 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1005 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1006 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1007 ibmvnic_send_crq(adapter, &crq);
1008 } else if (netdev_mc_empty(netdev)) {
1009 /* Reject all multicast */
1010 memset(&crq, 0, sizeof(crq));
1011 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1012 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1013 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1014 ibmvnic_send_crq(adapter, &crq);
1015 } else {
1016 /* Accept one or more multicast(s) */
1017 netdev_for_each_mc_addr(ha, netdev) {
1018 memset(&crq, 0, sizeof(crq));
1019 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1020 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1021 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1022 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1023 ha->addr);
1024 ibmvnic_send_crq(adapter, &crq);
1025 }
1026 }
1027 }
1028}
1029
1030static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1031{
1032 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1033 struct sockaddr *addr = p;
1034 union ibmvnic_crq crq;
1035
1036 if (!is_valid_ether_addr(addr->sa_data))
1037 return -EADDRNOTAVAIL;
1038
1039 memset(&crq, 0, sizeof(crq));
1040 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1041 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1042 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1043 ibmvnic_send_crq(adapter, &crq);
1044 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1045 return 0;
1046}
1047
032c5e82
TF		 1048static void ibmvnic_tx_timeout(struct net_device *dev)
1049{
1050 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1051 int rc;
1052
1053 /* Adapter timed out, resetting it */
1054 release_sub_crqs(adapter);
1055 rc = ibmvnic_reset_crq(adapter);
1056 if (rc)
1057 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
1058 else
1059 ibmvnic_send_crq_init(adapter);
1060}
1061
1062static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1063 struct ibmvnic_rx_buff *rx_buff)
1064{
1065 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1066
1067 rx_buff->skb = NULL;
1068
1069 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1070 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1071
1072 atomic_dec(&pool->available);
1073}
1074
1075static int ibmvnic_poll(struct napi_struct *napi, int budget)
1076{
1077 struct net_device *netdev = napi->dev;
1078 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1079 int scrq_num = (int)(napi - adapter->napi);
1080 int frames_processed = 0;
1081restart_poll:
1082 while (frames_processed < budget) {
1083 struct sk_buff *skb;
1084 struct ibmvnic_rx_buff *rx_buff;
1085 union sub_crq *next;
1086 u32 length;
1087 u16 offset;
1088 u8 flags = 0;
1089
1090 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1091 break;
1092 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1093 rx_buff =
1094 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1095 rx_comp.correlator);
1096 /* do error checking */
1097 if (next->rx_comp.rc) {
1098 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1099 /* free the entry */
1100 next->rx_comp.first = 0;
1101 remove_buff_from_pool(adapter, rx_buff);
1102 break;
1103 }
1104
1105 length = be32_to_cpu(next->rx_comp.len);
1106 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1107 flags = next->rx_comp.flags;
1108 skb = rx_buff->skb;
1109 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1110 length);
1111 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
1112 /* free the entry */
1113 next->rx_comp.first = 0;
1114 remove_buff_from_pool(adapter, rx_buff);
1115
1116 skb_put(skb, length);
1117 skb->protocol = eth_type_trans(skb, netdev);
1118
1119 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1120 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1121 skb->ip_summed = CHECKSUM_UNNECESSARY;
1122 }
1123
1124 length = skb->len;
1125 napi_gro_receive(napi, skb); /* send it up */
1126 netdev->stats.rx_packets++;
1127 netdev->stats.rx_bytes += length;
1128 frames_processed++;
1129 }
498cd8e4 1130 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1131
1132 if (frames_processed < budget) {
1133 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1134 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1135 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1136 napi_reschedule(napi)) {
1137 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1138 goto restart_poll;
1139 }
1140 }
1141 return frames_processed;
1142}
1143
1144#ifdef CONFIG_NET_POLL_CONTROLLER
1145static void ibmvnic_netpoll_controller(struct net_device *dev)
1146{
1147 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1148 int i;
1149
1150 replenish_pools(netdev_priv(dev));
1151 for (i = 0; i < adapter->req_rx_queues; i++)
1152 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1153 adapter->rx_scrq[i]);
1154}
1155#endif
1156
1157static const struct net_device_ops ibmvnic_netdev_ops = {
1158 .ndo_open = ibmvnic_open,
1159 .ndo_stop = ibmvnic_close,
1160 .ndo_start_xmit = ibmvnic_xmit,
1161 .ndo_set_rx_mode = ibmvnic_set_multi,
1162 .ndo_set_mac_address = ibmvnic_set_mac,
1163 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1164 .ndo_tx_timeout = ibmvnic_tx_timeout,
1165#ifdef CONFIG_NET_POLL_CONTROLLER
1166 .ndo_poll_controller = ibmvnic_netpoll_controller,
1167#endif
1168};
1169
1170/* ethtool functions */
1171
8a43379f
PR		 1172static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1173 struct ethtool_link_ksettings *cmd)
032c5e82 1174{
8a43379f
PR		 1175 u32 supported, advertising;
1176
1177 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1178 SUPPORTED_FIBRE);
8a43379f 1179 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1180 ADVERTISED_FIBRE);
8a43379f
PR		 1181 cmd->base.speed = SPEED_1000;
1182 cmd->base.duplex = DUPLEX_FULL;
1183 cmd->base.port = PORT_FIBRE;
1184 cmd->base.phy_address = 0;
1185 cmd->base.autoneg = AUTONEG_ENABLE;
1186
1187 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1188 supported);
1189 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1190 advertising);
1191
032c5e82
TF		 1192 return 0;
1193}
1194
1195static void ibmvnic_get_drvinfo(struct net_device *dev,
1196 struct ethtool_drvinfo *info)
1197{
1198 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1199 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1200}
1201
1202static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1203{
1204 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1205
1206 return adapter->msg_enable;
1207}
1208
1209static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1210{
1211 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1212
1213 adapter->msg_enable = data;
1214}
1215
1216static u32 ibmvnic_get_link(struct net_device *netdev)
1217{
1218 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1219
1220 /* Don't need to send a query because we request a logical link up at
1221 * init and then we wait for link state indications
1222 */
1223 return adapter->logical_link_state;
1224}
1225
1226static void ibmvnic_get_ringparam(struct net_device *netdev,
1227 struct ethtool_ringparam *ring)
1228{
1229 ring->rx_max_pending = 0;
1230 ring->tx_max_pending = 0;
1231 ring->rx_mini_max_pending = 0;
1232 ring->rx_jumbo_max_pending = 0;
1233 ring->rx_pending = 0;
1234 ring->tx_pending = 0;
1235 ring->rx_mini_pending = 0;
1236 ring->rx_jumbo_pending = 0;
1237}
1238
1239static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1240{
1241 int i;
1242
1243 if (stringset != ETH_SS_STATS)
1244 return;
1245
1246 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1247 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1248}
1249
1250static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1251{
1252 switch (sset) {
1253 case ETH_SS_STATS:
1254 return ARRAY_SIZE(ibmvnic_stats);
1255 default:
1256 return -EOPNOTSUPP;
1257 }
1258}
1259
1260static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1261 struct ethtool_stats *stats, u64 *data)
1262{
1263 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1264 union ibmvnic_crq crq;
1265 int i;
1266
1267 memset(&crq, 0, sizeof(crq));
1268 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1269 crq.request_statistics.cmd = REQUEST_STATISTICS;
1270 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1271 crq.request_statistics.len =
1272 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1273
1274 /* Wait for data to be written */
1275 init_completion(&adapter->stats_done);
db5d0b59 1276 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1277 wait_for_completion(&adapter->stats_done);
1278
1279 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1280 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1281}
1282
1283static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1284 .get_drvinfo = ibmvnic_get_drvinfo,
1285 .get_msglevel = ibmvnic_get_msglevel,
1286 .set_msglevel = ibmvnic_set_msglevel,
1287 .get_link = ibmvnic_get_link,
1288 .get_ringparam = ibmvnic_get_ringparam,
1289 .get_strings = ibmvnic_get_strings,
1290 .get_sset_count = ibmvnic_get_sset_count,
1291 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1292 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1293};
1294
1295/* Routines for managing CRQs/sCRQs */
1296
1297static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1298 struct ibmvnic_sub_crq_queue *scrq)
1299{
1300 struct device *dev = &adapter->vdev->dev;
1301 long rc;
1302
1303 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1304
1305 /* Close the sub-crqs */
1306 do {
1307 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1308 adapter->vdev->unit_address,
1309 scrq->crq_num);
1310 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1311
ffa73855
TF		 1312 if (rc) {
1313 netdev_err(adapter->netdev,
1314 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1315 scrq->crq_num, rc);
1316 }
1317
032c5e82
TF		 1318 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1319 DMA_BIDIRECTIONAL);
1320 free_pages((unsigned long)scrq->msgs, 2);
1321 kfree(scrq);
1322}
1323
1324static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1325 *adapter)
1326{
1327 struct device *dev = &adapter->vdev->dev;
1328 struct ibmvnic_sub_crq_queue *scrq;
1329 int rc;
1330
1331 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1332 if (!scrq)
1333 return NULL;
1334
12608c26 1335 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
032c5e82
TF		 1336 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1337 if (!scrq->msgs) {
1338 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1339 goto zero_page_failed;
1340 }
1341
1342 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1343 DMA_BIDIRECTIONAL);
1344 if (dma_mapping_error(dev, scrq->msg_token)) {
1345 dev_warn(dev, "Couldn't map crq queue messages page\n");
1346 goto map_failed;
1347 }
1348
1349 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1350 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1351
1352 if (rc == H_RESOURCE)
1353 rc = ibmvnic_reset_crq(adapter);
1354
1355 if (rc == H_CLOSED) {
1356 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1357 } else if (rc) {
1358 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1359 goto reg_failed;
1360 }
1361
032c5e82
TF		 1362 scrq->adapter = adapter;
1363 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1364 scrq->cur = 0;
142c0ac4 1365 atomic_set(&scrq->used, 0);
032c5e82
TF		 1366 scrq->rx_skb_top = NULL;
1367 spin_lock_init(&scrq->lock);
1368
1369 netdev_dbg(adapter->netdev,
1370 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1371 scrq->crq_num, scrq->hw_irq, scrq->irq);
1372
1373 return scrq;
1374
032c5e82
TF		 1375reg_failed:
1376 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1377 DMA_BIDIRECTIONAL);
1378map_failed:
1379 free_pages((unsigned long)scrq->msgs, 2);
1380zero_page_failed:
1381 kfree(scrq);
1382
1383 return NULL;
1384}
1385
1386static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1387{
1388 int i;
1389
1390 if (adapter->tx_scrq) {
b510888f
NF		 1391 for (i = 0; i < adapter->req_tx_queues; i++) {
1392 if (!adapter->tx_scrq[i])
1393 continue;
1394
1395 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1396 free_irq(adapter->tx_scrq[i]->irq,
1397 adapter->tx_scrq[i]);
88eb98a0 1398 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1399 adapter->tx_scrq[i]->irq = 0;
032c5e82 1400 }
b510888f
NF		 1401
1402 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1403 }
1404
9501df3c 1405 kfree(adapter->tx_scrq);
032c5e82
TF		 1406 adapter->tx_scrq = NULL;
1407 }
1408
1409 if (adapter->rx_scrq) {
b510888f
NF		 1410 for (i = 0; i < adapter->req_rx_queues; i++) {
1411 if (!adapter->rx_scrq[i])
1412 continue;
1413
1414 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1415 free_irq(adapter->rx_scrq[i]->irq,
1416 adapter->rx_scrq[i]);
88eb98a0 1417 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1418 adapter->rx_scrq[i]->irq = 0;
032c5e82 1419 }
032c5e82 1420
b510888f
NF		 1421 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1422 }
ea22d51a 1423
b510888f 1424 kfree(adapter->rx_scrq);
ea22d51a
TF		 1425 adapter->rx_scrq = NULL;
1426 }
ea22d51a
TF		 1427}
1428
032c5e82
TF		 1429static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1430 struct ibmvnic_sub_crq_queue *scrq)
1431{
1432 struct device *dev = &adapter->vdev->dev;
1433 unsigned long rc;
1434
1435 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1436 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1437 if (rc)
1438 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1439 scrq->hw_irq, rc);
1440 return rc;
1441}
1442
1443static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1444 struct ibmvnic_sub_crq_queue *scrq)
1445{
1446 struct device *dev = &adapter->vdev->dev;
1447 unsigned long rc;
1448
1449 if (scrq->hw_irq > 0x100000000ULL) {
1450 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1451 return 1;
1452 }
1453
1454 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1455 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1456 if (rc)
1457 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1458 scrq->hw_irq, rc);
1459 return rc;
1460}
1461
1462static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1463 struct ibmvnic_sub_crq_queue *scrq)
1464{
1465 struct device *dev = &adapter->vdev->dev;
1466 struct ibmvnic_tx_buff *txbuff;
1467 union sub_crq *next;
1468 int index;
1469 int i, j;
ad7775dc 1470 u8 first;
032c5e82
TF		 1471
1472restart_loop:
1473 while (pending_scrq(adapter, scrq)) {
1474 unsigned int pool = scrq->pool_index;
1475
1476 next = ibmvnic_next_scrq(adapter, scrq);
1477 for (i = 0; i < next->tx_comp.num_comps; i++) {
1478 if (next->tx_comp.rcs[i]) {
1479 dev_err(dev, "tx error %x\n",
1480 next->tx_comp.rcs[i]);
1481 continue;
1482 }
1483 index = be32_to_cpu(next->tx_comp.correlators[i]);
1484 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1485
1486 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1487 if (!txbuff->data_dma[j])
1488 continue;
1489
1490 txbuff->data_dma[j] = 0;
1491 txbuff->used_bounce = false;
1492 }
ad7775dc
TF		 1493 /* if sub_crq was sent indirectly */
1494 first = txbuff->indir_arr[0].generic.first;
1495 if (first == IBMVNIC_CRQ_CMD) {
1496 dma_unmap_single(dev, txbuff->indir_dma,
1497 sizeof(txbuff->indir_arr),
1498 DMA_TO_DEVICE);
1499 }
032c5e82 1500
142c0ac4
TF		 1501 if (txbuff->last_frag) {
1502 atomic_dec(&scrq->used);
1503
1504 if (atomic_read(&scrq->used) <=
1505 (adapter->req_tx_entries_per_subcrq / 2) &&
1506 netif_subqueue_stopped(adapter->netdev,
1507 txbuff->skb)) {
1508 netif_wake_subqueue(adapter->netdev,
1509 scrq->pool_index);
1510 netdev_dbg(adapter->netdev,
1511 "Started queue %d\n",
1512 scrq->pool_index);
1513 }
1514
032c5e82 1515 dev_kfree_skb_any(txbuff->skb);
142c0ac4 1516 }
032c5e82
TF		 1517
1518 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1519 producer_index] = index;
1520 adapter->tx_pool[pool].producer_index =
1521 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1522 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1523 }
1524 /* remove tx_comp scrq*/
1525 next->tx_comp.first = 0;
1526 }
1527
1528 enable_scrq_irq(adapter, scrq);
1529
1530 if (pending_scrq(adapter, scrq)) {
1531 disable_scrq_irq(adapter, scrq);
1532 goto restart_loop;
1533 }
1534
1535 return 0;
1536}
1537
1538static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1539{
1540 struct ibmvnic_sub_crq_queue *scrq = instance;
1541 struct ibmvnic_adapter *adapter = scrq->adapter;
1542
1543 disable_scrq_irq(adapter, scrq);
1544 ibmvnic_complete_tx(adapter, scrq);
1545
1546 return IRQ_HANDLED;
1547}
1548
1549static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1550{
1551 struct ibmvnic_sub_crq_queue *scrq = instance;
1552 struct ibmvnic_adapter *adapter = scrq->adapter;
1553
1554 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1555 disable_scrq_irq(adapter, scrq);
1556 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1557 }
1558
1559 return IRQ_HANDLED;
1560}
1561
ea22d51a
TF		 1562static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1563{
1564 struct device *dev = &adapter->vdev->dev;
1565 struct ibmvnic_sub_crq_queue *scrq;
1566 int i = 0, j = 0;
1567 int rc = 0;
1568
1569 for (i = 0; i < adapter->req_tx_queues; i++) {
1570 scrq = adapter->tx_scrq[i];
1571 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1572
99c1790e 1573 if (!scrq->irq) {
ea22d51a
TF		 1574 rc = -EINVAL;
1575 dev_err(dev, "Error mapping irq\n");
1576 goto req_tx_irq_failed;
1577 }
1578
1579 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1580 0, "ibmvnic_tx", scrq);
1581
1582 if (rc) {
1583 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1584 scrq->irq, rc);
1585 irq_dispose_mapping(scrq->irq);
1586 goto req_rx_irq_failed;
1587 }
1588 }
1589
1590 for (i = 0; i < adapter->req_rx_queues; i++) {
1591 scrq = adapter->rx_scrq[i];
1592 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1593 if (!scrq->irq) {
ea22d51a
TF		 1594 rc = -EINVAL;
1595 dev_err(dev, "Error mapping irq\n");
1596 goto req_rx_irq_failed;
1597 }
1598 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1599 0, "ibmvnic_rx", scrq);
1600 if (rc) {
1601 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1602 scrq->irq, rc);
1603 irq_dispose_mapping(scrq->irq);
1604 goto req_rx_irq_failed;
1605 }
1606 }
1607 return rc;
1608
1609req_rx_irq_failed:
8bf371e6 1610 for (j = 0; j < i; j++) {
ea22d51a
TF		 1611 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1612 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1613 }
ea22d51a
TF		 1614 i = adapter->req_tx_queues;
1615req_tx_irq_failed:
8bf371e6 1616 for (j = 0; j < i; j++) {
ea22d51a
TF		 1617 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1618 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1619 }
b510888f 1620 release_sub_crqs(adapter);
ea22d51a
TF		 1621 return rc;
1622}
1623
032c5e82
TF		 1624static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1625{
1626 struct device *dev = &adapter->vdev->dev;
1627 struct ibmvnic_sub_crq_queue **allqueues;
1628 int registered_queues = 0;
1629 union ibmvnic_crq crq;
1630 int total_queues;
1631 int more = 0;
ea22d51a 1632 int i;
032c5e82
TF		 1633
1634 if (!retry) {
1635 /* Sub-CRQ entries are 32 byte long */
1636 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1637
1638 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1639 adapter->min_rx_add_entries_per_subcrq > entries_page) {
1640 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1641 goto allqueues_failed;
1642 }
1643
1644 /* Get the minimum between the queried max and the entries
1645 * that fit in our PAGE_SIZE
1646 */
1647 adapter->req_tx_entries_per_subcrq =
1648 adapter->max_tx_entries_per_subcrq > entries_page ?
1649 entries_page : adapter->max_tx_entries_per_subcrq;
1650 adapter->req_rx_add_entries_per_subcrq =
1651 adapter->max_rx_add_entries_per_subcrq > entries_page ?
1652 entries_page : adapter->max_rx_add_entries_per_subcrq;
1653
6dbcd8fb
JA		 1654 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1655 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
498cd8e4 1656 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
032c5e82 1657
f39f0d1e 1658 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
032c5e82
TF		 1659 }
1660
1661 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1662
1663 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1664 if (!allqueues)
1665 goto allqueues_failed;
1666
1667 for (i = 0; i < total_queues; i++) {
1668 allqueues[i] = init_sub_crq_queue(adapter);
1669 if (!allqueues[i]) {
1670 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1671 break;
1672 }
1673 registered_queues++;
1674 }
1675
1676 /* Make sure we were able to register the minimum number of queues */
1677 if (registered_queues <
1678 adapter->min_tx_queues + adapter->min_rx_queues) {
1679 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1680 goto tx_failed;
1681 }
1682
1683 /* Distribute the failed allocated queues*/
1684 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1685 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1686 switch (i % 3) {
1687 case 0:
1688 if (adapter->req_rx_queues > adapter->min_rx_queues)
1689 adapter->req_rx_queues--;
1690 else
1691 more++;
1692 break;
1693 case 1:
1694 if (adapter->req_tx_queues > adapter->min_tx_queues)
1695 adapter->req_tx_queues--;
1696 else
1697 more++;
1698 break;
1699 }
1700 }
1701
1702 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1703 sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1704 if (!adapter->tx_scrq)
1705 goto tx_failed;
1706
1707 for (i = 0; i < adapter->req_tx_queues; i++) {
1708 adapter->tx_scrq[i] = allqueues[i];
1709 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 1710 }
1711
1712 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1713 sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1714 if (!adapter->rx_scrq)
1715 goto rx_failed;
1716
1717 for (i = 0; i < adapter->req_rx_queues; i++) {
1718 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1719 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 1720 }
1721
1722 memset(&crq, 0, sizeof(crq));
1723 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1724 crq.request_capability.cmd = REQUEST_CAPABILITY;
1725
1726 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 1727 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 1728 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1729 ibmvnic_send_crq(adapter, &crq);
1730
1731 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 1732 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 1733 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1734 ibmvnic_send_crq(adapter, &crq);
1735
1736 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 1737 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 1738 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1739 ibmvnic_send_crq(adapter, &crq);
1740
1741 crq.request_capability.capability =
1742 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1743 crq.request_capability.number =
de89e854 1744 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 1745 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1746 ibmvnic_send_crq(adapter, &crq);
1747
1748 crq.request_capability.capability =
1749 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1750 crq.request_capability.number =
de89e854 1751 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 1752 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1753 ibmvnic_send_crq(adapter, &crq);
1754
1755 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 1756 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 1757 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1758 ibmvnic_send_crq(adapter, &crq);
1759
1760 if (adapter->netdev->flags & IFF_PROMISC) {
1761 if (adapter->promisc_supported) {
1762 crq.request_capability.capability =
1763 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1764 crq.request_capability.number = cpu_to_be64(1);
901e040a 1765 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1766 ibmvnic_send_crq(adapter, &crq);
1767 }
1768 } else {
1769 crq.request_capability.capability =
1770 cpu_to_be16(PROMISC_REQUESTED);
de89e854 1771 crq.request_capability.number = cpu_to_be64(0);
901e040a 1772 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 1773 ibmvnic_send_crq(adapter, &crq);
1774 }
1775
1776 kfree(allqueues);
1777
1778 return;
1779
032c5e82
TF		 1780rx_failed:
1781 kfree(adapter->tx_scrq);
1782 adapter->tx_scrq = NULL;
1783tx_failed:
1784 for (i = 0; i < registered_queues; i++)
1785 release_sub_crq_queue(adapter, allqueues[i]);
1786 kfree(allqueues);
1787allqueues_failed:
1788 ibmvnic_remove(adapter->vdev);
1789}
1790
1791static int pending_scrq(struct ibmvnic_adapter *adapter,
1792 struct ibmvnic_sub_crq_queue *scrq)
1793{
1794 union sub_crq *entry = &scrq->msgs[scrq->cur];
1795
1796 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1797 return 1;
1798 else
1799 return 0;
1800}
1801
1802static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1803 struct ibmvnic_sub_crq_queue *scrq)
1804{
1805 union sub_crq *entry;
1806 unsigned long flags;
1807
1808 spin_lock_irqsave(&scrq->lock, flags);
1809 entry = &scrq->msgs[scrq->cur];
1810 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1811 if (++scrq->cur == scrq->size)
1812 scrq->cur = 0;
1813 } else {
1814 entry = NULL;
1815 }
1816 spin_unlock_irqrestore(&scrq->lock, flags);
1817
1818 return entry;
1819}
1820
1821static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1822{
1823 struct ibmvnic_crq_queue *queue = &adapter->crq;
1824 union ibmvnic_crq *crq;
1825
1826 crq = &queue->msgs[queue->cur];
1827 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1828 if (++queue->cur == queue->size)
1829 queue->cur = 0;
1830 } else {
1831 crq = NULL;
1832 }
1833
1834 return crq;
1835}
1836
1837static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1838 union sub_crq *sub_crq)
1839{
1840 unsigned int ua = adapter->vdev->unit_address;
1841 struct device *dev = &adapter->vdev->dev;
1842 u64 *u64_crq = (u64 *)sub_crq;
1843 int rc;
1844
1845 netdev_dbg(adapter->netdev,
1846 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1847 (unsigned long int)cpu_to_be64(remote_handle),
1848 (unsigned long int)cpu_to_be64(u64_crq[0]),
1849 (unsigned long int)cpu_to_be64(u64_crq[1]),
1850 (unsigned long int)cpu_to_be64(u64_crq[2]),
1851 (unsigned long int)cpu_to_be64(u64_crq[3]));
1852
1853 /* Make sure the hypervisor sees the complete request */
1854 mb();
1855
1856 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1857 cpu_to_be64(remote_handle),
1858 cpu_to_be64(u64_crq[0]),
1859 cpu_to_be64(u64_crq[1]),
1860 cpu_to_be64(u64_crq[2]),
1861 cpu_to_be64(u64_crq[3]));
1862
1863 if (rc) {
1864 if (rc == H_CLOSED)
1865 dev_warn(dev, "CRQ Queue closed\n");
1866 dev_err(dev, "Send error (rc=%d)\n", rc);
1867 }
1868
1869 return rc;
1870}
1871
ad7775dc
TF		 1872static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1873 u64 remote_handle, u64 ioba, u64 num_entries)
1874{
1875 unsigned int ua = adapter->vdev->unit_address;
1876 struct device *dev = &adapter->vdev->dev;
1877 int rc;
1878
1879 /* Make sure the hypervisor sees the complete request */
1880 mb();
1881 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1882 cpu_to_be64(remote_handle),
1883 ioba, num_entries);
1884
1885 if (rc) {
1886 if (rc == H_CLOSED)
1887 dev_warn(dev, "CRQ Queue closed\n");
1888 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1889 }
1890
1891 return rc;
1892}
1893
032c5e82
TF		 1894static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1895 union ibmvnic_crq *crq)
1896{
1897 unsigned int ua = adapter->vdev->unit_address;
1898 struct device *dev = &adapter->vdev->dev;
1899 u64 *u64_crq = (u64 *)crq;
1900 int rc;
1901
1902 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1903 (unsigned long int)cpu_to_be64(u64_crq[0]),
1904 (unsigned long int)cpu_to_be64(u64_crq[1]));
1905
1906 /* Make sure the hypervisor sees the complete request */
1907 mb();
1908
1909 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1910 cpu_to_be64(u64_crq[0]),
1911 cpu_to_be64(u64_crq[1]));
1912
1913 if (rc) {
1914 if (rc == H_CLOSED)
1915 dev_warn(dev, "CRQ Queue closed\n");
1916 dev_warn(dev, "Send error (rc=%d)\n", rc);
1917 }
1918
1919 return rc;
1920}
1921
1922static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1923{
1924 union ibmvnic_crq crq;
1925
1926 memset(&crq, 0, sizeof(crq));
1927 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1928 crq.generic.cmd = IBMVNIC_CRQ_INIT;
1929 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1930
1931 return ibmvnic_send_crq(adapter, &crq);
1932}
1933
1934static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1935{
1936 union ibmvnic_crq crq;
1937
1938 memset(&crq, 0, sizeof(crq));
1939 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1940 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1941 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1942
1943 return ibmvnic_send_crq(adapter, &crq);
1944}
1945
1946static int send_version_xchg(struct ibmvnic_adapter *adapter)
1947{
1948 union ibmvnic_crq crq;
1949
1950 memset(&crq, 0, sizeof(crq));
1951 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1952 crq.version_exchange.cmd = VERSION_EXCHANGE;
1953 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1954
1955 return ibmvnic_send_crq(adapter, &crq);
1956}
1957
1958static void send_login(struct ibmvnic_adapter *adapter)
1959{
1960 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1961 struct ibmvnic_login_buffer *login_buffer;
1962 struct ibmvnic_inflight_cmd *inflight_cmd;
1963 struct device *dev = &adapter->vdev->dev;
1964 dma_addr_t rsp_buffer_token;
1965 dma_addr_t buffer_token;
1966 size_t rsp_buffer_size;
1967 union ibmvnic_crq crq;
1968 unsigned long flags;
1969 size_t buffer_size;
1970 __be64 *tx_list_p;
1971 __be64 *rx_list_p;
1972 int i;
1973
1974 buffer_size =
1975 sizeof(struct ibmvnic_login_buffer) +
1976 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1977
1978 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1979 if (!login_buffer)
1980 goto buf_alloc_failed;
1981
1982 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1983 DMA_TO_DEVICE);
1984 if (dma_mapping_error(dev, buffer_token)) {
1985 dev_err(dev, "Couldn't map login buffer\n");
1986 goto buf_map_failed;
1987 }
1988
498cd8e4
JA		 1989 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1990 sizeof(u64) * adapter->req_tx_queues +
1991 sizeof(u64) * adapter->req_rx_queues +
1992 sizeof(u64) * adapter->req_rx_queues +
1993 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 1994
1995 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1996 if (!login_rsp_buffer)
1997 goto buf_rsp_alloc_failed;
1998
1999 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2000 rsp_buffer_size, DMA_FROM_DEVICE);
2001 if (dma_mapping_error(dev, rsp_buffer_token)) {
2002 dev_err(dev, "Couldn't map login rsp buffer\n");
2003 goto buf_rsp_map_failed;
2004 }
2005 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2006 if (!inflight_cmd) {
2007 dev_err(dev, "Couldn't allocate inflight_cmd\n");
2008 goto inflight_alloc_failed;
2009 }
2010 adapter->login_buf = login_buffer;
2011 adapter->login_buf_token = buffer_token;
2012 adapter->login_buf_sz = buffer_size;
2013 adapter->login_rsp_buf = login_rsp_buffer;
2014 adapter->login_rsp_buf_token = rsp_buffer_token;
2015 adapter->login_rsp_buf_sz = rsp_buffer_size;
2016
2017 login_buffer->len = cpu_to_be32(buffer_size);
2018 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2019 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2020 login_buffer->off_txcomp_subcrqs =
2021 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2022 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2023 login_buffer->off_rxcomp_subcrqs =
2024 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2025 sizeof(u64) * adapter->req_tx_queues);
2026 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2027 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2028
2029 tx_list_p = (__be64 *)((char *)login_buffer +
2030 sizeof(struct ibmvnic_login_buffer));
2031 rx_list_p = (__be64 *)((char *)login_buffer +
2032 sizeof(struct ibmvnic_login_buffer) +
2033 sizeof(u64) * adapter->req_tx_queues);
2034
2035 for (i = 0; i < adapter->req_tx_queues; i++) {
2036 if (adapter->tx_scrq[i]) {
2037 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2038 crq_num);
2039 }
2040 }
2041
2042 for (i = 0; i < adapter->req_rx_queues; i++) {
2043 if (adapter->rx_scrq[i]) {
2044 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2045 crq_num);
2046 }
2047 }
2048
2049 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2050 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2051 netdev_dbg(adapter->netdev, "%016lx\n",
2052 ((unsigned long int *)(adapter->login_buf))[i]);
2053 }
2054
2055 memset(&crq, 0, sizeof(crq));
2056 crq.login.first = IBMVNIC_CRQ_CMD;
2057 crq.login.cmd = LOGIN;
2058 crq.login.ioba = cpu_to_be32(buffer_token);
2059 crq.login.len = cpu_to_be32(buffer_size);
2060
2061 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2062
2063 spin_lock_irqsave(&adapter->inflight_lock, flags);
2064 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2065 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2066
2067 ibmvnic_send_crq(adapter, &crq);
2068
2069 return;
2070
2071inflight_alloc_failed:
2072 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
2073 DMA_FROM_DEVICE);
2074buf_rsp_map_failed:
2075 kfree(login_rsp_buffer);
2076buf_rsp_alloc_failed:
2077 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2078buf_map_failed:
2079 kfree(login_buffer);
2080buf_alloc_failed:
2081 return;
2082}
2083
2084static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2085 u32 len, u8 map_id)
2086{
2087 union ibmvnic_crq crq;
2088
2089 memset(&crq, 0, sizeof(crq));
2090 crq.request_map.first = IBMVNIC_CRQ_CMD;
2091 crq.request_map.cmd = REQUEST_MAP;
2092 crq.request_map.map_id = map_id;
2093 crq.request_map.ioba = cpu_to_be32(addr);
2094 crq.request_map.len = cpu_to_be32(len);
2095 ibmvnic_send_crq(adapter, &crq);
2096}
2097
2098static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2099{
2100 union ibmvnic_crq crq;
2101
2102 memset(&crq, 0, sizeof(crq));
2103 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2104 crq.request_unmap.cmd = REQUEST_UNMAP;
2105 crq.request_unmap.map_id = map_id;
2106 ibmvnic_send_crq(adapter, &crq);
2107}
2108
2109static void send_map_query(struct ibmvnic_adapter *adapter)
2110{
2111 union ibmvnic_crq crq;
2112
2113 memset(&crq, 0, sizeof(crq));
2114 crq.query_map.first = IBMVNIC_CRQ_CMD;
2115 crq.query_map.cmd = QUERY_MAP;
2116 ibmvnic_send_crq(adapter, &crq);
2117}
2118
2119/* Send a series of CRQs requesting various capabilities of the VNIC server */
2120static void send_cap_queries(struct ibmvnic_adapter *adapter)
2121{
2122 union ibmvnic_crq crq;
2123
901e040a 2124 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2125 memset(&crq, 0, sizeof(crq));
2126 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2127 crq.query_capability.cmd = QUERY_CAPABILITY;
2128
2129 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2130 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2131 ibmvnic_send_crq(adapter, &crq);
2132
2133 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2134 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2135 ibmvnic_send_crq(adapter, &crq);
2136
2137 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2138 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2139 ibmvnic_send_crq(adapter, &crq);
2140
2141 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2142 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2143 ibmvnic_send_crq(adapter, &crq);
2144
2145 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
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(MAX_RX_ADD_QUEUES);
901e040a 2150 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2151 ibmvnic_send_crq(adapter, &crq);
2152
2153 crq.query_capability.capability =
2154 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2155 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2156 ibmvnic_send_crq(adapter, &crq);
2157
2158 crq.query_capability.capability =
2159 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2160 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2161 ibmvnic_send_crq(adapter, &crq);
2162
2163 crq.query_capability.capability =
2164 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2165 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2166 ibmvnic_send_crq(adapter, &crq);
2167
2168 crq.query_capability.capability =
2169 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
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(TCP_IP_OFFLOAD);
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(PROMISC_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(MIN_MTU);
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(MAX_MTU);
901e040a 2186 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2187 ibmvnic_send_crq(adapter, &crq);
2188
2189 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2190 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2191 ibmvnic_send_crq(adapter, &crq);
2192
2193 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2194 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2195 ibmvnic_send_crq(adapter, &crq);
2196
2197 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2198 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2199 ibmvnic_send_crq(adapter, &crq);
2200
2201 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2202 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2203 ibmvnic_send_crq(adapter, &crq);
2204
2205 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2206 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2207 ibmvnic_send_crq(adapter, &crq);
2208
2209 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2210 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2211 ibmvnic_send_crq(adapter, &crq);
2212
2213 crq.query_capability.capability =
2214 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2215 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2216 ibmvnic_send_crq(adapter, &crq);
2217
2218 crq.query_capability.capability =
2219 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2220 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2221 ibmvnic_send_crq(adapter, &crq);
2222
2223 crq.query_capability.capability =
2224 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2225 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2226 ibmvnic_send_crq(adapter, &crq);
2227
2228 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2229 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2230 ibmvnic_send_crq(adapter, &crq);
2231}
2232
2233static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2234{
2235 struct device *dev = &adapter->vdev->dev;
2236 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2237 union ibmvnic_crq crq;
2238 int i;
2239
2240 dma_unmap_single(dev, adapter->ip_offload_tok,
2241 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2242
2243 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2244 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2245 netdev_dbg(adapter->netdev, "%016lx\n",
2246 ((unsigned long int *)(buf))[i]);
2247
2248 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2249 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2250 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2251 buf->tcp_ipv4_chksum);
2252 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2253 buf->tcp_ipv6_chksum);
2254 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2255 buf->udp_ipv4_chksum);
2256 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2257 buf->udp_ipv6_chksum);
2258 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2259 buf->large_tx_ipv4);
2260 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2261 buf->large_tx_ipv6);
2262 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2263 buf->large_rx_ipv4);
2264 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2265 buf->large_rx_ipv6);
2266 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2267 buf->max_ipv4_header_size);
2268 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2269 buf->max_ipv6_header_size);
2270 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2271 buf->max_tcp_header_size);
2272 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2273 buf->max_udp_header_size);
2274 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2275 buf->max_large_tx_size);
2276 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2277 buf->max_large_rx_size);
2278 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2279 buf->ipv6_extension_header);
2280 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2281 buf->tcp_pseudosum_req);
2282 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2283 buf->num_ipv6_ext_headers);
2284 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2285 buf->off_ipv6_ext_headers);
2286
2287 adapter->ip_offload_ctrl_tok =
2288 dma_map_single(dev, &adapter->ip_offload_ctrl,
2289 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2290
2291 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2292 dev_err(dev, "Couldn't map ip offload control buffer\n");
2293 return;
2294 }
2295
2296 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2297 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2298 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2299 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2300 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2301
2302 /* large_tx/rx disabled for now, additional features needed */
2303 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2304 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2305 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2306 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2307
2308 adapter->netdev->features = NETIF_F_GSO;
2309
2310 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2311 adapter->netdev->features |= NETIF_F_IP_CSUM;
2312
2313 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2314 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2315
9be02cdf
TF		 2316 if ((adapter->netdev->features &
2317 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2318 adapter->netdev->features |= NETIF_F_RXCSUM;
2319
032c5e82
TF		 2320 memset(&crq, 0, sizeof(crq));
2321 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2322 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2323 crq.control_ip_offload.len =
2324 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2325 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2326 ibmvnic_send_crq(adapter, &crq);
2327}
2328
2329static void handle_error_info_rsp(union ibmvnic_crq *crq,
2330 struct ibmvnic_adapter *adapter)
2331{
2332 struct device *dev = &adapter->vdev->dev;
96183182 2333 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2334 unsigned long flags;
2335 bool found = false;
2336 int i;
2337
2338 if (!crq->request_error_rsp.rc.code) {
2339 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2340 crq->request_error_rsp.rc.code);
2341 return;
2342 }
2343
2344 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2345 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2346 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2347 found = true;
2348 list_del(&error_buff->list);
2349 break;
2350 }
2351 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2352
2353 if (!found) {
2354 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2355 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2356 return;
2357 }
2358
2359 dev_err(dev, "Detailed info for error id %x:",
75224c93 2360 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2361
2362 for (i = 0; i < error_buff->len; i++) {
2363 pr_cont("%02x", (int)error_buff->buff[i]);
2364 if (i % 8 == 7)
2365 pr_cont(" ");
2366 }
2367 pr_cont("\n");
2368
2369 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2370 DMA_FROM_DEVICE);
2371 kfree(error_buff->buff);
2372 kfree(error_buff);
2373}
2374
032c5e82
TF		 2375static void handle_error_indication(union ibmvnic_crq *crq,
2376 struct ibmvnic_adapter *adapter)
2377{
2378 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2379 struct ibmvnic_inflight_cmd *inflight_cmd;
2380 struct device *dev = &adapter->vdev->dev;
2381 struct ibmvnic_error_buff *error_buff;
2382 union ibmvnic_crq new_crq;
2383 unsigned long flags;
2384
2385 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2386 crq->error_indication.
2387 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
75224c93
TF		 2388 be32_to_cpu(crq->error_indication.error_id),
2389 be16_to_cpu(crq->error_indication.error_cause));
032c5e82
TF		 2390
2391 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2392 if (!error_buff)
2393 return;
2394
2395 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2396 if (!error_buff->buff) {
2397 kfree(error_buff);
2398 return;
2399 }
2400
2401 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2402 DMA_FROM_DEVICE);
2403 if (dma_mapping_error(dev, error_buff->dma)) {
2404 if (!firmware_has_feature(FW_FEATURE_CMO))
2405 dev_err(dev, "Couldn't map error buffer\n");
2406 kfree(error_buff->buff);
2407 kfree(error_buff);
2408 return;
2409 }
2410
2411 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2412 if (!inflight_cmd) {
2413 dma_unmap_single(dev, error_buff->dma, detail_len,
2414 DMA_FROM_DEVICE);
2415 kfree(error_buff->buff);
2416 kfree(error_buff);
2417 return;
2418 }
2419
2420 error_buff->len = detail_len;
2421 error_buff->error_id = crq->error_indication.error_id;
2422
2423 spin_lock_irqsave(&adapter->error_list_lock, flags);
2424 list_add_tail(&error_buff->list, &adapter->errors);
2425 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2426
2427 memset(&new_crq, 0, sizeof(new_crq));
2428 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2429 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2430 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2431 new_crq.request_error_info.len = cpu_to_be32(detail_len);
2432 new_crq.request_error_info.error_id = crq->error_indication.error_id;
2433
2434 memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2435
2436 spin_lock_irqsave(&adapter->inflight_lock, flags);
2437 list_add_tail(&inflight_cmd->list, &adapter->inflight);
2438 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2439
2440 ibmvnic_send_crq(adapter, &new_crq);
2441}
2442
2443static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2444 struct ibmvnic_adapter *adapter)
2445{
2446 struct net_device *netdev = adapter->netdev;
2447 struct device *dev = &adapter->vdev->dev;
2448 long rc;
2449
2450 rc = crq->change_mac_addr_rsp.rc.code;
2451 if (rc) {
2452 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2453 return;
2454 }
2455 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2456 ETH_ALEN);
2457}
2458
2459static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2460 struct ibmvnic_adapter *adapter)
2461{
2462 struct device *dev = &adapter->vdev->dev;
2463 u64 *req_value;
2464 char *name;
2465
901e040a 2466 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2467 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2468 case REQ_TX_QUEUES:
2469 req_value = &adapter->req_tx_queues;
2470 name = "tx";
2471 break;
2472 case REQ_RX_QUEUES:
2473 req_value = &adapter->req_rx_queues;
2474 name = "rx";
2475 break;
2476 case REQ_RX_ADD_QUEUES:
2477 req_value = &adapter->req_rx_add_queues;
2478 name = "rx_add";
2479 break;
2480 case REQ_TX_ENTRIES_PER_SUBCRQ:
2481 req_value = &adapter->req_tx_entries_per_subcrq;
2482 name = "tx_entries_per_subcrq";
2483 break;
2484 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2485 req_value = &adapter->req_rx_add_entries_per_subcrq;
2486 name = "rx_add_entries_per_subcrq";
2487 break;
2488 case REQ_MTU:
2489 req_value = &adapter->req_mtu;
2490 name = "mtu";
2491 break;
2492 case PROMISC_REQUESTED:
2493 req_value = &adapter->promisc;
2494 name = "promisc";
2495 break;
2496 default:
2497 dev_err(dev, "Got invalid cap request rsp %d\n",
2498 crq->request_capability.capability);
2499 return;
2500 }
2501
2502 switch (crq->request_capability_rsp.rc.code) {
2503 case SUCCESS:
2504 break;
2505 case PARTIALSUCCESS:
2506 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2507 *req_value,
28f4d165 2508 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2509 number), name);
b510888f 2510 release_sub_crqs(adapter);
28f4d165 2511 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
ea22d51a 2512 init_sub_crqs(adapter, 1);
032c5e82
TF		 2513 return;
2514 default:
2515 dev_err(dev, "Error %d in request cap rsp\n",
2516 crq->request_capability_rsp.rc.code);
2517 return;
2518 }
2519
2520 /* Done receiving requested capabilities, query IP offload support */
901e040a 2521 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2522 union ibmvnic_crq newcrq;
2523 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2524 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2525 &adapter->ip_offload_buf;
2526
249168ad 2527 adapter->wait_capability = false;
032c5e82
TF		 2528 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2529 buf_sz,
2530 DMA_FROM_DEVICE);
2531
2532 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2533 if (!firmware_has_feature(FW_FEATURE_CMO))
2534 dev_err(dev, "Couldn't map offload buffer\n");
2535 return;
2536 }
2537
2538 memset(&newcrq, 0, sizeof(newcrq));
2539 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2540 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2541 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2542 newcrq.query_ip_offload.ioba =
2543 cpu_to_be32(adapter->ip_offload_tok);
2544
2545 ibmvnic_send_crq(adapter, &newcrq);
2546 }
2547}
2548
2549static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2550 struct ibmvnic_adapter *adapter)
2551{
2552 struct device *dev = &adapter->vdev->dev;
2553 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2554 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2555 int i;
2556
2557 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2558 DMA_BIDIRECTIONAL);
2559 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2560 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2561
498cd8e4
JA		 2562 /* If the number of queues requested can't be allocated by the
2563 * server, the login response will return with code 1. We will need
2564 * to resend the login buffer with fewer queues requested.
2565 */
2566 if (login_rsp_crq->generic.rc.code) {
2567 adapter->renegotiate = true;
2568 complete(&adapter->init_done);
2569 return 0;
2570 }
2571
032c5e82
TF		 2572 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2573 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2574 netdev_dbg(adapter->netdev, "%016lx\n",
2575 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2576 }
2577
2578 /* Sanity checks */
2579 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2580 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2581 adapter->req_rx_add_queues !=
2582 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2583 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2584 ibmvnic_remove(adapter->vdev);
2585 return -EIO;
2586 }
2587 complete(&adapter->init_done);
2588
032c5e82
TF		 2589 return 0;
2590}
2591
2592static void handle_request_map_rsp(union ibmvnic_crq *crq,
2593 struct ibmvnic_adapter *adapter)
2594{
2595 struct device *dev = &adapter->vdev->dev;
2596 u8 map_id = crq->request_map_rsp.map_id;
2597 int tx_subcrqs;
2598 int rx_subcrqs;
2599 long rc;
2600 int i;
2601
2602 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2603 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2604
2605 rc = crq->request_map_rsp.rc.code;
2606 if (rc) {
2607 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2608 adapter->map_id--;
2609 /* need to find and zero tx/rx_pool map_id */
2610 for (i = 0; i < tx_subcrqs; i++) {
2611 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2612 adapter->tx_pool[i].long_term_buff.map_id = 0;
2613 }
2614 for (i = 0; i < rx_subcrqs; i++) {
2615 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2616 adapter->rx_pool[i].long_term_buff.map_id = 0;
2617 }
2618 }
2619 complete(&adapter->fw_done);
2620}
2621
2622static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2623 struct ibmvnic_adapter *adapter)
2624{
2625 struct device *dev = &adapter->vdev->dev;
2626 long rc;
2627
2628 rc = crq->request_unmap_rsp.rc.code;
2629 if (rc)
2630 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2631}
2632
2633static void handle_query_map_rsp(union ibmvnic_crq *crq,
2634 struct ibmvnic_adapter *adapter)
2635{
2636 struct net_device *netdev = adapter->netdev;
2637 struct device *dev = &adapter->vdev->dev;
2638 long rc;
2639
2640 rc = crq->query_map_rsp.rc.code;
2641 if (rc) {
2642 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2643 return;
2644 }
2645 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2646 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2647 crq->query_map_rsp.free_pages);
2648}
2649
2650static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2651 struct ibmvnic_adapter *adapter)
2652{
2653 struct net_device *netdev = adapter->netdev;
2654 struct device *dev = &adapter->vdev->dev;
2655 long rc;
2656
901e040a 2657 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2658 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2659 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2660 rc = crq->query_capability.rc.code;
2661 if (rc) {
2662 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2663 goto out;
2664 }
2665
2666 switch (be16_to_cpu(crq->query_capability.capability)) {
2667 case MIN_TX_QUEUES:
2668 adapter->min_tx_queues =
de89e854 2669 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2670 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2671 adapter->min_tx_queues);
2672 break;
2673 case MIN_RX_QUEUES:
2674 adapter->min_rx_queues =
de89e854 2675 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2676 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2677 adapter->min_rx_queues);
2678 break;
2679 case MIN_RX_ADD_QUEUES:
2680 adapter->min_rx_add_queues =
de89e854 2681 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2682 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2683 adapter->min_rx_add_queues);
2684 break;
2685 case MAX_TX_QUEUES:
2686 adapter->max_tx_queues =
de89e854 2687 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2688 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2689 adapter->max_tx_queues);
2690 break;
2691 case MAX_RX_QUEUES:
2692 adapter->max_rx_queues =
de89e854 2693 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2694 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2695 adapter->max_rx_queues);
2696 break;
2697 case MAX_RX_ADD_QUEUES:
2698 adapter->max_rx_add_queues =
de89e854 2699 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2700 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2701 adapter->max_rx_add_queues);
2702 break;
2703 case MIN_TX_ENTRIES_PER_SUBCRQ:
2704 adapter->min_tx_entries_per_subcrq =
de89e854 2705 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2706 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2707 adapter->min_tx_entries_per_subcrq);
2708 break;
2709 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2710 adapter->min_rx_add_entries_per_subcrq =
de89e854 2711 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2712 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2713 adapter->min_rx_add_entries_per_subcrq);
2714 break;
2715 case MAX_TX_ENTRIES_PER_SUBCRQ:
2716 adapter->max_tx_entries_per_subcrq =
de89e854 2717 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2718 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2719 adapter->max_tx_entries_per_subcrq);
2720 break;
2721 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2722 adapter->max_rx_add_entries_per_subcrq =
de89e854 2723 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2724 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2725 adapter->max_rx_add_entries_per_subcrq);
2726 break;
2727 case TCP_IP_OFFLOAD:
2728 adapter->tcp_ip_offload =
de89e854 2729 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2730 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2731 adapter->tcp_ip_offload);
2732 break;
2733 case PROMISC_SUPPORTED:
2734 adapter->promisc_supported =
de89e854 2735 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2736 netdev_dbg(netdev, "promisc_supported = %lld\n",
2737 adapter->promisc_supported);
2738 break;
2739 case MIN_MTU:
de89e854 2740 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 2741 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 2742 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2743 break;
2744 case MAX_MTU:
de89e854 2745 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 2746 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 2747 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2748 break;
2749 case MAX_MULTICAST_FILTERS:
2750 adapter->max_multicast_filters =
de89e854 2751 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2752 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2753 adapter->max_multicast_filters);
2754 break;
2755 case VLAN_HEADER_INSERTION:
2756 adapter->vlan_header_insertion =
de89e854 2757 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2758 if (adapter->vlan_header_insertion)
2759 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2760 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2761 adapter->vlan_header_insertion);
2762 break;
2763 case MAX_TX_SG_ENTRIES:
2764 adapter->max_tx_sg_entries =
de89e854 2765 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2766 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2767 adapter->max_tx_sg_entries);
2768 break;
2769 case RX_SG_SUPPORTED:
2770 adapter->rx_sg_supported =
de89e854 2771 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2772 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2773 adapter->rx_sg_supported);
2774 break;
2775 case OPT_TX_COMP_SUB_QUEUES:
2776 adapter->opt_tx_comp_sub_queues =
de89e854 2777 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2778 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2779 adapter->opt_tx_comp_sub_queues);
2780 break;
2781 case OPT_RX_COMP_QUEUES:
2782 adapter->opt_rx_comp_queues =
de89e854 2783 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2784 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2785 adapter->opt_rx_comp_queues);
2786 break;
2787 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2788 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 2789 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2790 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2791 adapter->opt_rx_bufadd_q_per_rx_comp_q);
2792 break;
2793 case OPT_TX_ENTRIES_PER_SUBCRQ:
2794 adapter->opt_tx_entries_per_subcrq =
de89e854 2795 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2796 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2797 adapter->opt_tx_entries_per_subcrq);
2798 break;
2799 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2800 adapter->opt_rxba_entries_per_subcrq =
de89e854 2801 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2802 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2803 adapter->opt_rxba_entries_per_subcrq);
2804 break;
2805 case TX_RX_DESC_REQ:
2806 adapter->tx_rx_desc_req = crq->query_capability.number;
2807 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2808 adapter->tx_rx_desc_req);
2809 break;
2810
2811 default:
2812 netdev_err(netdev, "Got invalid cap rsp %d\n",
2813 crq->query_capability.capability);
2814 }
2815
2816out:
249168ad
TF		 2817 if (atomic_read(&adapter->running_cap_crqs) == 0) {
2818 adapter->wait_capability = false;
ea22d51a 2819 init_sub_crqs(adapter, 0);
032c5e82 2820 /* We're done querying the capabilities, initialize sub-crqs */
249168ad 2821 }
032c5e82
TF		 2822}
2823
032c5e82
TF		 2824static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
2825{
96183182 2826 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
032c5e82 2827 struct device *dev = &adapter->vdev->dev;
96183182 2828 struct ibmvnic_error_buff *error_buff, *tmp2;
032c5e82
TF		 2829 unsigned long flags;
2830 unsigned long flags2;
2831
2832 spin_lock_irqsave(&adapter->inflight_lock, flags);
96183182 2833 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
032c5e82
TF		 2834 switch (inflight_cmd->crq.generic.cmd) {
2835 case LOGIN:
2836 dma_unmap_single(dev, adapter->login_buf_token,
2837 adapter->login_buf_sz,
2838 DMA_BIDIRECTIONAL);
2839 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2840 adapter->login_rsp_buf_sz,
2841 DMA_BIDIRECTIONAL);
2842 kfree(adapter->login_rsp_buf);
2843 kfree(adapter->login_buf);
2844 break;
032c5e82
TF		 2845 case REQUEST_ERROR_INFO:
2846 spin_lock_irqsave(&adapter->error_list_lock, flags2);
96183182
WY		 2847 list_for_each_entry_safe(error_buff, tmp2,
2848 &adapter->errors, list) {
032c5e82
TF		 2849 dma_unmap_single(dev, error_buff->dma,
2850 error_buff->len,
2851 DMA_FROM_DEVICE);
2852 kfree(error_buff->buff);
2853 list_del(&error_buff->list);
2854 kfree(error_buff);
2855 }
2856 spin_unlock_irqrestore(&adapter->error_list_lock,
2857 flags2);
2858 break;
2859 }
2860 list_del(&inflight_cmd->list);
2861 kfree(inflight_cmd);
2862 }
2863 spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2864}
2865
9888d7b0
TF		 2866static void ibmvnic_xport_event(struct work_struct *work)
2867{
2868 struct ibmvnic_adapter *adapter = container_of(work,
2869 struct ibmvnic_adapter,
2870 ibmvnic_xport);
2871 struct device *dev = &adapter->vdev->dev;
2872 long rc;
2873
2874 ibmvnic_free_inflight(adapter);
2875 release_sub_crqs(adapter);
2876 if (adapter->migrated) {
2877 rc = ibmvnic_reenable_crq_queue(adapter);
2878 if (rc)
2879 dev_err(dev, "Error after enable rc=%ld\n", rc);
2880 adapter->migrated = false;
2881 rc = ibmvnic_send_crq_init(adapter);
2882 if (rc)
2883 dev_err(dev, "Error sending init rc=%ld\n", rc);
2884 }
2885}
2886
032c5e82
TF		 2887static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2888 struct ibmvnic_adapter *adapter)
2889{
2890 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2891 struct net_device *netdev = adapter->netdev;
2892 struct device *dev = &adapter->vdev->dev;
993a82b0 2893 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 2894 long rc;
2895
2896 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 2897 (unsigned long int)cpu_to_be64(u64_crq[0]),
2898 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 2899 switch (gen_crq->first) {
2900 case IBMVNIC_CRQ_INIT_RSP:
2901 switch (gen_crq->cmd) {
2902 case IBMVNIC_CRQ_INIT:
2903 dev_info(dev, "Partner initialized\n");
2904 /* Send back a response */
2905 rc = ibmvnic_send_crq_init_complete(adapter);
65dc6891
TF		 2906 if (!rc)
2907 schedule_work(&adapter->vnic_crq_init);
032c5e82
TF		 2908 else
2909 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
2910 break;
2911 case IBMVNIC_CRQ_INIT_COMPLETE:
2912 dev_info(dev, "Partner initialization complete\n");
2913 send_version_xchg(adapter);
2914 break;
2915 default:
2916 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
2917 }
2918 return;
2919 case IBMVNIC_CRQ_XPORT_EVENT:
2920 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
2921 dev_info(dev, "Re-enabling adapter\n");
2922 adapter->migrated = true;
9888d7b0 2923 schedule_work(&adapter->ibmvnic_xport);
dfad09a6
TF		 2924 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
2925 dev_info(dev, "Backing device failover detected\n");
2926 netif_carrier_off(netdev);
2927 adapter->failover = true;
032c5e82
TF		 2928 } else {
2929 /* The adapter lost the connection */
2930 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
2931 gen_crq->cmd);
9888d7b0 2932 schedule_work(&adapter->ibmvnic_xport);
032c5e82
TF		 2933 }
2934 return;
2935 case IBMVNIC_CRQ_CMD_RSP:
2936 break;
2937 default:
2938 dev_err(dev, "Got an invalid msg type 0x%02x\n",
2939 gen_crq->first);
2940 return;
2941 }
2942
2943 switch (gen_crq->cmd) {
2944 case VERSION_EXCHANGE_RSP:
2945 rc = crq->version_exchange_rsp.rc.code;
2946 if (rc) {
2947 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
2948 break;
2949 }
2950 dev_info(dev, "Partner protocol version is %d\n",
2951 crq->version_exchange_rsp.version);
2952 if (be16_to_cpu(crq->version_exchange_rsp.version) <
2953 ibmvnic_version)
2954 ibmvnic_version =
2955 be16_to_cpu(crq->version_exchange_rsp.version);
2956 send_cap_queries(adapter);
2957 break;
2958 case QUERY_CAPABILITY_RSP:
2959 handle_query_cap_rsp(crq, adapter);
2960 break;
2961 case QUERY_MAP_RSP:
2962 handle_query_map_rsp(crq, adapter);
2963 break;
2964 case REQUEST_MAP_RSP:
2965 handle_request_map_rsp(crq, adapter);
2966 break;
2967 case REQUEST_UNMAP_RSP:
2968 handle_request_unmap_rsp(crq, adapter);
2969 break;
2970 case REQUEST_CAPABILITY_RSP:
2971 handle_request_cap_rsp(crq, adapter);
2972 break;
2973 case LOGIN_RSP:
2974 netdev_dbg(netdev, "Got Login Response\n");
2975 handle_login_rsp(crq, adapter);
2976 break;
2977 case LOGICAL_LINK_STATE_RSP:
2978 netdev_dbg(netdev, "Got Logical Link State Response\n");
2979 adapter->logical_link_state =
2980 crq->logical_link_state_rsp.link_state;
2981 break;
2982 case LINK_STATE_INDICATION:
2983 netdev_dbg(netdev, "Got Logical Link State Indication\n");
2984 adapter->phys_link_state =
2985 crq->link_state_indication.phys_link_state;
2986 adapter->logical_link_state =
2987 crq->link_state_indication.logical_link_state;
2988 break;
2989 case CHANGE_MAC_ADDR_RSP:
2990 netdev_dbg(netdev, "Got MAC address change Response\n");
2991 handle_change_mac_rsp(crq, adapter);
2992 break;
2993 case ERROR_INDICATION:
2994 netdev_dbg(netdev, "Got Error Indication\n");
2995 handle_error_indication(crq, adapter);
2996 break;
2997 case REQUEST_ERROR_RSP:
2998 netdev_dbg(netdev, "Got Error Detail Response\n");
2999 handle_error_info_rsp(crq, adapter);
3000 break;
3001 case REQUEST_STATISTICS_RSP:
3002 netdev_dbg(netdev, "Got Statistics Response\n");
3003 complete(&adapter->stats_done);
3004 break;
032c5e82
TF		 3005 case QUERY_IP_OFFLOAD_RSP:
3006 netdev_dbg(netdev, "Got Query IP offload Response\n");
3007 handle_query_ip_offload_rsp(adapter);
3008 break;
3009 case MULTICAST_CTRL_RSP:
3010 netdev_dbg(netdev, "Got multicast control Response\n");
3011 break;
3012 case CONTROL_IP_OFFLOAD_RSP:
3013 netdev_dbg(netdev, "Got Control IP offload Response\n");
3014 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3015 sizeof(adapter->ip_offload_ctrl),
3016 DMA_TO_DEVICE);
bd0b6723 3017 complete(&adapter->init_done);
032c5e82 3018 break;
032c5e82
TF		 3019 case COLLECT_FW_TRACE_RSP:
3020 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3021 complete(&adapter->fw_done);
3022 break;
3023 default:
3024 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3025 gen_crq->cmd);
3026 }
3027}
3028
3029static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3030{
3031 struct ibmvnic_adapter *adapter = instance;
6c267b3d
TF		 3032 unsigned long flags;
3033
3034 spin_lock_irqsave(&adapter->crq.lock, flags);
3035 vio_disable_interrupts(adapter->vdev);
3036 tasklet_schedule(&adapter->tasklet);
3037 spin_unlock_irqrestore(&adapter->crq.lock, flags);
3038 return IRQ_HANDLED;
3039}
3040
3041static void ibmvnic_tasklet(void *data)
3042{
3043 struct ibmvnic_adapter *adapter = data;
032c5e82
TF		 3044 struct ibmvnic_crq_queue *queue = &adapter->crq;
3045 struct vio_dev *vdev = adapter->vdev;
3046 union ibmvnic_crq *crq;
3047 unsigned long flags;
3048 bool done = false;
3049
3050 spin_lock_irqsave(&queue->lock, flags);
3051 vio_disable_interrupts(vdev);
3052 while (!done) {
3053 /* Pull all the valid messages off the CRQ */
3054 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3055 ibmvnic_handle_crq(crq, adapter);
3056 crq->generic.first = 0;
3057 }
3058 vio_enable_interrupts(vdev);
3059 crq = ibmvnic_next_crq(adapter);
3060 if (crq) {
3061 vio_disable_interrupts(vdev);
3062 ibmvnic_handle_crq(crq, adapter);
3063 crq->generic.first = 0;
3064 } else {
249168ad
TF		 3065 /* remain in tasklet until all
3066 * capabilities responses are received
3067 */
3068 if (!adapter->wait_capability)
3069 done = true;
032c5e82
TF		 3070 }
3071 }
249168ad
TF		 3072 /* if capabilities CRQ's were sent in this tasklet, the following
3073 * tasklet must wait until all responses are received
3074 */
3075 if (atomic_read(&adapter->running_cap_crqs) != 0)
3076 adapter->wait_capability = true;
032c5e82 3077 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3078}
3079
3080static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3081{
3082 struct vio_dev *vdev = adapter->vdev;
3083 int rc;
3084
3085 do {
3086 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3087 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3088
3089 if (rc)
3090 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3091
3092 return rc;
3093}
3094
3095static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3096{
3097 struct ibmvnic_crq_queue *crq = &adapter->crq;
3098 struct device *dev = &adapter->vdev->dev;
3099 struct vio_dev *vdev = adapter->vdev;
3100 int rc;
3101
3102 /* Close the CRQ */
3103 do {
3104 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3105 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3106
3107 /* Clean out the queue */
3108 memset(crq->msgs, 0, PAGE_SIZE);
3109 crq->cur = 0;
3110
3111 /* And re-open it again */
3112 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3113 crq->msg_token, PAGE_SIZE);
3114
3115 if (rc == H_CLOSED)
3116 /* Adapter is good, but other end is not ready */
3117 dev_warn(dev, "Partner adapter not ready\n");
3118 else if (rc != 0)
3119 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3120
3121 return rc;
3122}
3123
f992887c 3124static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3125{
3126 struct ibmvnic_crq_queue *crq = &adapter->crq;
3127 struct vio_dev *vdev = adapter->vdev;
3128 long rc;
3129
f992887c
NF		 3130 if (!crq->msgs)
3131 return;
3132
032c5e82
TF		 3133 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3134 free_irq(vdev->irq, adapter);
6c267b3d 3135 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3136 do {
3137 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3138 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3139
3140 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3141 DMA_BIDIRECTIONAL);
3142 free_page((unsigned long)crq->msgs);
f992887c 3143 crq->msgs = NULL;
032c5e82
TF		 3144}
3145
f992887c 3146static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3147{
3148 struct ibmvnic_crq_queue *crq = &adapter->crq;
3149 struct device *dev = &adapter->vdev->dev;
3150 struct vio_dev *vdev = adapter->vdev;
3151 int rc, retrc = -ENOMEM;
3152
f992887c
NF		 3153 if (crq->msgs)
3154 return 0;
3155
032c5e82
TF		 3156 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3157 /* Should we allocate more than one page? */
3158
3159 if (!crq->msgs)
3160 return -ENOMEM;
3161
3162 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3163 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3164 DMA_BIDIRECTIONAL);
3165 if (dma_mapping_error(dev, crq->msg_token))
3166 goto map_failed;
3167
3168 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3169 crq->msg_token, PAGE_SIZE);
3170
3171 if (rc == H_RESOURCE)
3172 /* maybe kexecing and resource is busy. try a reset */
3173 rc = ibmvnic_reset_crq(adapter);
3174 retrc = rc;
3175
3176 if (rc == H_CLOSED) {
3177 dev_warn(dev, "Partner adapter not ready\n");
3178 } else if (rc) {
3179 dev_warn(dev, "Error %d opening adapter\n", rc);
3180 goto reg_crq_failed;
3181 }
3182
3183 retrc = 0;
3184
6c267b3d
TF		 3185 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3186 (unsigned long)adapter);
3187
032c5e82
TF		 3188 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3189 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3190 adapter);
3191 if (rc) {
3192 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3193 vdev->irq, rc);
3194 goto req_irq_failed;
3195 }
3196
3197 rc = vio_enable_interrupts(vdev);
3198 if (rc) {
3199 dev_err(dev, "Error %d enabling interrupts\n", rc);
3200 goto req_irq_failed;
3201 }
3202
3203 crq->cur = 0;
3204 spin_lock_init(&crq->lock);
3205
3206 return retrc;
3207
3208req_irq_failed:
6c267b3d 3209 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3210 do {
3211 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3212 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3213reg_crq_failed:
3214 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3215map_failed:
3216 free_page((unsigned long)crq->msgs);
f992887c 3217 crq->msgs = NULL;
032c5e82
TF		 3218 return retrc;
3219}
3220
65dc6891
TF		 3221static void handle_crq_init_rsp(struct work_struct *work)
3222{
3223 struct ibmvnic_adapter *adapter = container_of(work,
3224 struct ibmvnic_adapter,
3225 vnic_crq_init);
3226 struct device *dev = &adapter->vdev->dev;
3227 struct net_device *netdev = adapter->netdev;
3228 unsigned long timeout = msecs_to_jiffies(30000);
dfad09a6 3229 bool restart = false;
65dc6891
TF		 3230 int rc;
3231
dfad09a6
TF		 3232 if (adapter->failover) {
3233 release_sub_crqs(adapter);
3234 if (netif_running(netdev)) {
3235 netif_tx_disable(netdev);
3236 ibmvnic_close(netdev);
3237 restart = true;
3238 }
3239 }
3240
65dc6891 3241 reinit_completion(&adapter->init_done);
db5d0b59 3242 send_version_xchg(adapter);
65dc6891
TF		 3243 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3244 dev_err(dev, "Passive init timeout\n");
3245 goto task_failed;
3246 }
3247
f39f0d1e 3248 netdev->mtu = adapter->req_mtu - ETH_HLEN;
65dc6891 3249
dfad09a6
TF		 3250 if (adapter->failover) {
3251 adapter->failover = false;
3252 if (restart) {
3253 rc = ibmvnic_open(netdev);
3254 if (rc)
3255 goto restart_failed;
3256 }
3257 netif_carrier_on(netdev);
3258 return;
3259 }
3260
65dc6891
TF		 3261 rc = register_netdev(netdev);
3262 if (rc) {
3263 dev_err(dev,
3264 "failed to register netdev rc=%d\n", rc);
3265 goto register_failed;
3266 }
3267 dev_info(dev, "ibmvnic registered\n");
3268
3269 return;
3270
dfad09a6
TF		 3271restart_failed:
3272 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
65dc6891
TF		 3273register_failed:
3274 release_sub_crqs(adapter);
3275task_failed:
3276 dev_err(dev, "Passive initialization was not successful\n");
3277}
3278
f6ef6408 3279static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3280{
f6ef6408 3281 struct device *dev = &adapter->vdev->dev;
ea22d51a 3282 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3283 int rc;
3284
f992887c 3285 rc = init_crq_queue(adapter);
f6ef6408
JA		 3286 if (rc) {
3287 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3288 return rc;
3289 }
3290
7bbc27a4
NF		 3291 rc = init_stats_token(adapter);
3292 if (rc) {
f992887c 3293 release_crq_queue(adapter);
7bbc27a4 3294 return rc;
f6ef6408
JA		 3295 }
3296
f6ef6408
JA		 3297 init_completion(&adapter->init_done);
3298 ibmvnic_send_crq_init(adapter);
3299 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3300 dev_err(dev, "Initialization sequence timed out\n");
f992887c 3301 release_crq_queue(adapter);
f6ef6408
JA		 3302 return -1;
3303 }
3304
3305 return 0;
3306}
3307
3308static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3309{
032c5e82
TF		 3310 struct ibmvnic_adapter *adapter;
3311 struct net_device *netdev;
3312 unsigned char *mac_addr_p;
032c5e82
TF		 3313 int rc;
3314
3315 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3316 dev->unit_address);
3317
3318 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3319 VETH_MAC_ADDR, NULL);
3320 if (!mac_addr_p) {
3321 dev_err(&dev->dev,
3322 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3323 __FILE__, __LINE__);
3324 return 0;
3325 }
3326
3327 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3328 IBMVNIC_MAX_TX_QUEUES);
3329 if (!netdev)
3330 return -ENOMEM;
3331
3332 adapter = netdev_priv(netdev);
3333 dev_set_drvdata(&dev->dev, netdev);
3334 adapter->vdev = dev;
3335 adapter->netdev = netdev;
dfad09a6 3336 adapter->failover = false;
032c5e82
TF		 3337
3338 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3339 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3340 netdev->irq = dev->irq;
3341 netdev->netdev_ops = &ibmvnic_netdev_ops;
3342 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3343 SET_NETDEV_DEV(netdev, &dev->dev);
3344
65dc6891 3345 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
9888d7b0 3346 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
65dc6891 3347
032c5e82
TF		 3348 spin_lock_init(&adapter->stats_lock);
3349
032c5e82
TF		 3350 INIT_LIST_HEAD(&adapter->errors);
3351 INIT_LIST_HEAD(&adapter->inflight);
3352 spin_lock_init(&adapter->error_list_lock);
3353 spin_lock_init(&adapter->inflight_lock);
3354
f6ef6408
JA		 3355 rc = ibmvnic_init(adapter);
3356 if (rc) {
3357 free_netdev(netdev);
3358 return rc;
032c5e82 3359 }
032c5e82 3360
f39f0d1e 3361 netdev->mtu = adapter->req_mtu - ETH_HLEN;
ea5509f5 3362 adapter->is_closed = false;
032c5e82
TF		 3363
3364 rc = register_netdev(netdev);
3365 if (rc) {
3366 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3367 free_netdev(netdev);
3368 return rc;
032c5e82
TF		 3369 }
3370 dev_info(&dev->dev, "ibmvnic registered\n");
3371
3372 return 0;
032c5e82
TF		 3373}
3374
3375static int ibmvnic_remove(struct vio_dev *dev)
3376{
3377 struct net_device *netdev = dev_get_drvdata(&dev->dev);
032c5e82
TF		 3378
3379 unregister_netdev(netdev);
032c5e82
TF		 3380 free_netdev(netdev);
3381 dev_set_drvdata(&dev->dev, NULL);
3382
3383 return 0;
3384}
3385
3386static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3387{
3388 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3389 struct ibmvnic_adapter *adapter;
3390 struct iommu_table *tbl;
3391 unsigned long ret = 0;
3392 int i;
3393
3394 tbl = get_iommu_table_base(&vdev->dev);
3395
3396 /* netdev inits at probe time along with the structures we need below*/
3397 if (!netdev)
3398 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3399
3400 adapter = netdev_priv(netdev);
3401
3402 ret += PAGE_SIZE; /* the crq message queue */
3403 ret += adapter->bounce_buffer_size;
3404 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3405
3406 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3407 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3408
3409 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3410 i++)
3411 ret += adapter->rx_pool[i].size *
3412 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3413
3414 return ret;
3415}
3416
3417static int ibmvnic_resume(struct device *dev)
3418{
3419 struct net_device *netdev = dev_get_drvdata(dev);
3420 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3421 int i;
3422
3423 /* kick the interrupt handlers just in case we lost an interrupt */
3424 for (i = 0; i < adapter->req_rx_queues; i++)
3425 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3426 adapter->rx_scrq[i]);
3427
3428 return 0;
3429}
3430
3431static struct vio_device_id ibmvnic_device_table[] = {
3432 {"network", "IBM,vnic"},
3433 {"", "" }
3434};
3435MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3436
3437static const struct dev_pm_ops ibmvnic_pm_ops = {
3438 .resume = ibmvnic_resume
3439};
3440
3441static struct vio_driver ibmvnic_driver = {
3442 .id_table = ibmvnic_device_table,
3443 .probe = ibmvnic_probe,
3444 .remove = ibmvnic_remove,
3445 .get_desired_dma = ibmvnic_get_desired_dma,
3446 .name = ibmvnic_driver_name,
3447 .pm = &ibmvnic_pm_ops,
3448};
3449
3450/* module functions */
3451static int __init ibmvnic_module_init(void)
3452{
3453 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3454 IBMVNIC_DRIVER_VERSION);
3455
3456 return vio_register_driver(&ibmvnic_driver);
3457}
3458
3459static void __exit ibmvnic_module_exit(void)
3460{
3461 vio_unregister_driver(&ibmvnic_driver);
3462}
3463
3464module_init(ibmvnic_module_init);
3465module_exit(ibmvnic_module_exit);
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