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ibmvnic: Clean up tx pools when closing
[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>
6052d5e2 77#include <linux/if_vlan.h>
032c5e82
TF		 78
79#include "ibmvnic.h"
80
81static const char ibmvnic_driver_name[] = "ibmvnic";
82static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
83
84MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
85MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
88
89static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90static int ibmvnic_remove(struct vio_dev *);
91static void release_sub_crqs(struct ibmvnic_adapter *);
92static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
ad7775dc 98static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
032c5e82
TF		 99static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108static int ibmvnic_poll(struct napi_struct *napi, int data);
109static void send_map_query(struct ibmvnic_adapter *adapter);
110static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111static void send_request_unmap(struct ibmvnic_adapter *, u8);
bd0b6723
JA		 112static void send_login(struct ibmvnic_adapter *adapter);
113static void send_cap_queries(struct ibmvnic_adapter *adapter);
114static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
ea5509f5 115static int ibmvnic_init(struct ibmvnic_adapter *);
f992887c 116static void release_crq_queue(struct ibmvnic_adapter *);
032c5e82
TF		 117
118struct ibmvnic_stat {
119 char name[ETH_GSTRING_LEN];
120 int offset;
121};
122
123#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
124 offsetof(struct ibmvnic_statistics, stat))
125#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
126
127static const struct ibmvnic_stat ibmvnic_stats[] = {
128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
150};
151
152static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
153 unsigned long length, unsigned long *number,
154 unsigned long *irq)
155{
156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
157 long rc;
158
159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
160 *number = retbuf[0];
161 *irq = retbuf[1];
162
163 return rc;
164}
165
032c5e82
TF		 166static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
167 struct ibmvnic_long_term_buff *ltb, int size)
168{
169 struct device *dev = &adapter->vdev->dev;
170
171 ltb->size = size;
172 ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
173 GFP_KERNEL);
174
175 if (!ltb->buff) {
176 dev_err(dev, "Couldn't alloc long term buffer\n");
177 return -ENOMEM;
178 }
179 ltb->map_id = adapter->map_id;
180 adapter->map_id++;
db5d0b59
NF		 181
182 init_completion(&adapter->fw_done);
032c5e82
TF		 183 send_request_map(adapter, ltb->addr,
184 ltb->size, ltb->map_id);
032c5e82
TF		 185 wait_for_completion(&adapter->fw_done);
186 return 0;
187}
188
189static void free_long_term_buff(struct ibmvnic_adapter *adapter,
190 struct ibmvnic_long_term_buff *ltb)
191{
192 struct device *dev = &adapter->vdev->dev;
193
c657e32c
NF		 194 if (!ltb->buff)
195 return;
196
ed651a10
NF		 197 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
198 adapter->reset_reason != VNIC_RESET_MOBILITY)
dfad09a6 199 send_request_unmap(adapter, ltb->map_id);
59af56c2 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
032c5e82
TF		 201}
202
032c5e82
TF		 203static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
204 struct ibmvnic_rx_pool *pool)
205{
206 int count = pool->size - atomic_read(&pool->available);
207 struct device *dev = &adapter->vdev->dev;
208 int buffers_added = 0;
209 unsigned long lpar_rc;
210 union sub_crq sub_crq;
211 struct sk_buff *skb;
212 unsigned int offset;
213 dma_addr_t dma_addr;
214 unsigned char *dst;
215 u64 *handle_array;
216 int shift = 0;
217 int index;
218 int i;
219
220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
221 be32_to_cpu(adapter->login_rsp_buf->
222 off_rxadd_subcrqs));
223
224 for (i = 0; i < count; ++i) {
225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
226 if (!skb) {
227 dev_err(dev, "Couldn't replenish rx buff\n");
228 adapter->replenish_no_mem++;
229 break;
230 }
231
232 index = pool->free_map[pool->next_free];
233
234 if (pool->rx_buff[index].skb)
235 dev_err(dev, "Inconsistent free_map!\n");
236
237 /* Copy the skb to the long term mapped DMA buffer */
238 offset = index * pool->buff_size;
239 dst = pool->long_term_buff.buff + offset;
240 memset(dst, 0, pool->buff_size);
241 dma_addr = pool->long_term_buff.addr + offset;
242 pool->rx_buff[index].data = dst;
243
244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
245 pool->rx_buff[index].dma = dma_addr;
246 pool->rx_buff[index].skb = skb;
247 pool->rx_buff[index].pool_index = pool->index;
248 pool->rx_buff[index].size = pool->buff_size;
249
250 memset(&sub_crq, 0, sizeof(sub_crq));
251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
252 sub_crq.rx_add.correlator =
253 cpu_to_be64((u64)&pool->rx_buff[index]);
254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
256
257 /* The length field of the sCRQ is defined to be 24 bits so the
258 * buffer size needs to be left shifted by a byte before it is
259 * converted to big endian to prevent the last byte from being
260 * truncated.
261 */
262#ifdef __LITTLE_ENDIAN__
263 shift = 8;
264#endif
265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
266
267 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
268 &sub_crq);
269 if (lpar_rc != H_SUCCESS)
270 goto failure;
271
272 buffers_added++;
273 adapter->replenish_add_buff_success++;
274 pool->next_free = (pool->next_free + 1) % pool->size;
275 }
276 atomic_add(buffers_added, &pool->available);
277 return;
278
279failure:
280 dev_info(dev, "replenish pools failure\n");
281 pool->free_map[pool->next_free] = index;
282 pool->rx_buff[index].skb = NULL;
283 if (!dma_mapping_error(dev, dma_addr))
284 dma_unmap_single(dev, dma_addr, pool->buff_size,
285 DMA_FROM_DEVICE);
286
287 dev_kfree_skb_any(skb);
288 adapter->replenish_add_buff_failure++;
289 atomic_add(buffers_added, &pool->available);
290}
291
292static void replenish_pools(struct ibmvnic_adapter *adapter)
293{
294 int i;
295
032c5e82
TF		 296 adapter->replenish_task_cycles++;
297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
298 i++) {
299 if (adapter->rx_pool[i].active)
300 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
301 }
302}
303
7bbc27a4
NF		 304static void release_stats_token(struct ibmvnic_adapter *adapter)
305{
306 struct device *dev = &adapter->vdev->dev;
307
308 if (!adapter->stats_token)
309 return;
310
311 dma_unmap_single(dev, adapter->stats_token,
312 sizeof(struct ibmvnic_statistics),
313 DMA_FROM_DEVICE);
314 adapter->stats_token = 0;
315}
316
317static int init_stats_token(struct ibmvnic_adapter *adapter)
318{
319 struct device *dev = &adapter->vdev->dev;
320 dma_addr_t stok;
321
322 stok = dma_map_single(dev, &adapter->stats,
323 sizeof(struct ibmvnic_statistics),
324 DMA_FROM_DEVICE);
325 if (dma_mapping_error(dev, stok)) {
326 dev_err(dev, "Couldn't map stats buffer\n");
327 return -1;
328 }
329
330 adapter->stats_token = stok;
331 return 0;
332}
333
0ffe2cb7 334static void release_rx_pools(struct ibmvnic_adapter *adapter)
032c5e82 335{
0ffe2cb7
NF		 336 struct ibmvnic_rx_pool *rx_pool;
337 int rx_scrqs;
338 int i, j;
032c5e82 339
0ffe2cb7 340 if (!adapter->rx_pool)
032c5e82
TF		 341 return;
342
0ffe2cb7
NF		 343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
344 for (i = 0; i < rx_scrqs; i++) {
345 rx_pool = &adapter->rx_pool[i];
346
347 kfree(rx_pool->free_map);
348 free_long_term_buff(adapter, &rx_pool->long_term_buff);
349
350 if (!rx_pool->rx_buff)
e0ebe942 351 continue;
0ffe2cb7
NF		 352
353 for (j = 0; j < rx_pool->size; j++) {
354 if (rx_pool->rx_buff[j].skb) {
355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
356 rx_pool->rx_buff[i].skb = NULL;
357 }
358 }
359
360 kfree(rx_pool->rx_buff);
361 }
362
363 kfree(adapter->rx_pool);
364 adapter->rx_pool = NULL;
365}
366
367static int init_rx_pools(struct net_device *netdev)
368{
369 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
370 struct device *dev = &adapter->vdev->dev;
371 struct ibmvnic_rx_pool *rx_pool;
372 int rxadd_subcrqs;
373 u64 *size_array;
374 int i, j;
375
376 rxadd_subcrqs =
377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
380
381 adapter->rx_pool = kcalloc(rxadd_subcrqs,
382 sizeof(struct ibmvnic_rx_pool),
383 GFP_KERNEL);
384 if (!adapter->rx_pool) {
385 dev_err(dev, "Failed to allocate rx pools\n");
386 return -1;
387 }
388
389 for (i = 0; i < rxadd_subcrqs; i++) {
390 rx_pool = &adapter->rx_pool[i];
391
392 netdev_dbg(adapter->netdev,
393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
394 i, adapter->req_rx_add_entries_per_subcrq,
395 be64_to_cpu(size_array[i]));
396
397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
398 rx_pool->index = i;
399 rx_pool->buff_size = be64_to_cpu(size_array[i]);
400 rx_pool->active = 1;
401
402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
403 GFP_KERNEL);
404 if (!rx_pool->free_map) {
405 release_rx_pools(adapter);
406 return -1;
032c5e82 407 }
0ffe2cb7
NF		 408
409 rx_pool->rx_buff = kcalloc(rx_pool->size,
410 sizeof(struct ibmvnic_rx_buff),
411 GFP_KERNEL);
412 if (!rx_pool->rx_buff) {
413 dev_err(dev, "Couldn't alloc rx buffers\n");
414 release_rx_pools(adapter);
415 return -1;
416 }
417
418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
419 rx_pool->size * rx_pool->buff_size)) {
420 release_rx_pools(adapter);
421 return -1;
422 }
423
424 for (j = 0; j < rx_pool->size; ++j)
425 rx_pool->free_map[j] = j;
426
427 atomic_set(&rx_pool->available, 0);
428 rx_pool->next_alloc = 0;
429 rx_pool->next_free = 0;
032c5e82 430 }
0ffe2cb7
NF		 431
432 return 0;
032c5e82
TF		 433}
434
c657e32c
NF		 435static void release_tx_pools(struct ibmvnic_adapter *adapter)
436{
437 struct ibmvnic_tx_pool *tx_pool;
438 int i, tx_scrqs;
439
440 if (!adapter->tx_pool)
441 return;
442
443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
444 for (i = 0; i < tx_scrqs; i++) {
445 tx_pool = &adapter->tx_pool[i];
446 kfree(tx_pool->tx_buff);
447 free_long_term_buff(adapter, &tx_pool->long_term_buff);
448 kfree(tx_pool->free_map);
449 }
450
451 kfree(adapter->tx_pool);
452 adapter->tx_pool = NULL;
453}
454
455static int init_tx_pools(struct net_device *netdev)
456{
457 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
458 struct device *dev = &adapter->vdev->dev;
459 struct ibmvnic_tx_pool *tx_pool;
460 int tx_subcrqs;
461 int i, j;
462
463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
464 adapter->tx_pool = kcalloc(tx_subcrqs,
465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
466 if (!adapter->tx_pool)
467 return -1;
468
469 for (i = 0; i < tx_subcrqs; i++) {
470 tx_pool = &adapter->tx_pool[i];
471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
472 sizeof(struct ibmvnic_tx_buff),
473 GFP_KERNEL);
474 if (!tx_pool->tx_buff) {
475 dev_err(dev, "tx pool buffer allocation failed\n");
476 release_tx_pools(adapter);
477 return -1;
478 }
479
480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
481 adapter->req_tx_entries_per_subcrq *
482 adapter->req_mtu)) {
483 release_tx_pools(adapter);
484 return -1;
485 }
486
487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
488 sizeof(int), GFP_KERNEL);
489 if (!tx_pool->free_map) {
490 release_tx_pools(adapter);
491 return -1;
492 }
493
494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
495 tx_pool->free_map[j] = j;
496
497 tx_pool->consumer_index = 0;
498 tx_pool->producer_index = 0;
499 }
500
501 return 0;
502}
503
661a2622
NF		 504static void release_error_buffers(struct ibmvnic_adapter *adapter)
505{
506 struct device *dev = &adapter->vdev->dev;
507 struct ibmvnic_error_buff *error_buff, *tmp;
508 unsigned long flags;
509
510 spin_lock_irqsave(&adapter->error_list_lock, flags);
511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
512 list_del(&error_buff->list);
513 dma_unmap_single(dev, error_buff->dma, error_buff->len,
514 DMA_FROM_DEVICE);
515 kfree(error_buff->buff);
516 kfree(error_buff);
517 }
518 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
519}
520
a57a5d25 521static int ibmvnic_login(struct net_device *netdev)
032c5e82
TF		 522{
523 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
bd0b6723 524 unsigned long timeout = msecs_to_jiffies(30000);
032c5e82 525 struct device *dev = &adapter->vdev->dev;
032c5e82 526
bd0b6723
JA		 527 do {
528 if (adapter->renegotiate) {
529 adapter->renegotiate = false;
b510888f 530 release_sub_crqs(adapter);
bd0b6723
JA		 531
532 reinit_completion(&adapter->init_done);
533 send_cap_queries(adapter);
534 if (!wait_for_completion_timeout(&adapter->init_done,
535 timeout)) {
536 dev_err(dev, "Capabilities query timeout\n");
537 return -1;
538 }
539 }
540
541 reinit_completion(&adapter->init_done);
542 send_login(adapter);
543 if (!wait_for_completion_timeout(&adapter->init_done,
544 timeout)) {
545 dev_err(dev, "Login timeout\n");
546 return -1;
547 }
548 } while (adapter->renegotiate);
549
a57a5d25
JA		 550 return 0;
551}
552
1b8955ee
NF		 553static void release_resources(struct ibmvnic_adapter *adapter)
554{
c7bac00b
NF		 555 int i;
556
1b8955ee
NF		 557 release_tx_pools(adapter);
558 release_rx_pools(adapter);
559
1b8955ee 560 release_stats_token(adapter);
661a2622 561 release_error_buffers(adapter);
c7bac00b
NF		 562
563 if (adapter->napi) {
564 for (i = 0; i < adapter->req_rx_queues; i++) {
565 if (&adapter->napi[i])
566 netif_napi_del(&adapter->napi[i]);
567 }
568 }
1b8955ee
NF		 569}
570
53da09e9
NF		 571static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
572{
573 struct net_device *netdev = adapter->netdev;
574 unsigned long timeout = msecs_to_jiffies(30000);
575 union ibmvnic_crq crq;
576 bool resend;
577 int rc;
578
53da09e9
NF		 579 netdev_err(netdev, "setting link state %d\n", link_state);
580 memset(&crq, 0, sizeof(crq));
581 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
582 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
583 crq.logical_link_state.link_state = link_state;
584
585 do {
586 resend = false;
587
588 reinit_completion(&adapter->init_done);
589 rc = ibmvnic_send_crq(adapter, &crq);
590 if (rc) {
591 netdev_err(netdev, "Failed to set link state\n");
592 return rc;
593 }
594
595 if (!wait_for_completion_timeout(&adapter->init_done,
596 timeout)) {
597 netdev_err(netdev, "timeout setting link state\n");
598 return -1;
599 }
600
601 if (adapter->init_done_rc == 1) {
602 /* Partuial success, delay and re-send */
603 mdelay(1000);
604 resend = true;
605 }
606 } while (resend);
607
608 return 0;
609}
610
7f3c6e6b
TF		 611static int set_real_num_queues(struct net_device *netdev)
612{
613 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
614 int rc;
615
616 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
617 if (rc) {
618 netdev_err(netdev, "failed to set the number of tx queues\n");
619 return rc;
620 }
621
622 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
623 if (rc)
624 netdev_err(netdev, "failed to set the number of rx queues\n");
625
626 return rc;
627}
628
bfc32f29 629static int init_resources(struct ibmvnic_adapter *adapter)
a57a5d25 630{
bfc32f29
NF		 631 struct net_device *netdev = adapter->netdev;
632 int i, rc;
a57a5d25 633
7f3c6e6b
TF		 634 rc = set_real_num_queues(netdev);
635 if (rc)
636 return rc;
bd0b6723
JA		 637
638 rc = init_sub_crq_irqs(adapter);
639 if (rc) {
bfc32f29 640 netdev_err(netdev, "failed to initialize sub crq irqs\n");
bd0b6723
JA		 641 return -1;
642 }
643
5d5e84eb
NF		 644 rc = init_stats_token(adapter);
645 if (rc)
646 return rc;
647
032c5e82
TF		 648 adapter->map_id = 1;
649 adapter->napi = kcalloc(adapter->req_rx_queues,
650 sizeof(struct napi_struct), GFP_KERNEL);
651 if (!adapter->napi)
bfc32f29
NF		 652 return -ENOMEM;
653
032c5e82
TF		 654 for (i = 0; i < adapter->req_rx_queues; i++) {
655 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
656 NAPI_POLL_WEIGHT);
032c5e82 657 }
032c5e82 658
032c5e82 659 send_map_query(adapter);
0ffe2cb7
NF		 660
661 rc = init_rx_pools(netdev);
662 if (rc)
bfc32f29 663 return rc;
032c5e82 664
c657e32c 665 rc = init_tx_pools(netdev);
bfc32f29
NF		 666 return rc;
667}
668
ed651a10 669static int __ibmvnic_open(struct net_device *netdev)
bfc32f29
NF		 670{
671 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
ed651a10 672 enum vnic_state prev_state = adapter->state;
bfc32f29
NF		 673 int i, rc;
674
90c8014c 675 adapter->state = VNIC_OPENING;
032c5e82
TF		 676 replenish_pools(adapter);
677
bfc32f29
NF		 678 for (i = 0; i < adapter->req_rx_queues; i++)
679 napi_enable(&adapter->napi[i]);
680
032c5e82
TF		 681 /* We're ready to receive frames, enable the sub-crq interrupts and
682 * set the logical link state to up
683 */
ed651a10
NF		 684 for (i = 0; i < adapter->req_rx_queues; i++) {
685 if (prev_state == VNIC_CLOSED)
686 enable_irq(adapter->rx_scrq[i]->irq);
687 else
688 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
689 }
032c5e82 690
ed651a10
NF		 691 for (i = 0; i < adapter->req_tx_queues; i++) {
692 if (prev_state == VNIC_CLOSED)
693 enable_irq(adapter->tx_scrq[i]->irq);
694 else
695 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
696 }
032c5e82 697
53da09e9 698 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
bfc32f29
NF		 699 if (rc) {
700 for (i = 0; i < adapter->req_rx_queues; i++)
701 napi_disable(&adapter->napi[i]);
702 release_resources(adapter);
ed651a10 703 return rc;
bfc32f29 704 }
032c5e82 705
ed651a10
NF		 706 netif_tx_start_all_queues(netdev);
707
708 if (prev_state == VNIC_CLOSED) {
709 for (i = 0; i < adapter->req_rx_queues; i++)
710 napi_schedule(&adapter->napi[i]);
711 }
712
713 adapter->state = VNIC_OPEN;
714 return rc;
715}
716
717static int ibmvnic_open(struct net_device *netdev)
718{
719 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
720 int rc;
721
722 mutex_lock(&adapter->reset_lock);
723
724 if (adapter->state != VNIC_CLOSED) {
725 rc = ibmvnic_login(netdev);
726 if (rc) {
727 mutex_unlock(&adapter->reset_lock);
728 return rc;
729 }
730
731 rc = init_resources(adapter);
732 if (rc) {
733 netdev_err(netdev, "failed to initialize resources\n");
734 release_resources(adapter);
735 mutex_unlock(&adapter->reset_lock);
736 return rc;
737 }
738 }
739
740 rc = __ibmvnic_open(netdev);
741 mutex_unlock(&adapter->reset_lock);
742
bfc32f29 743 return rc;
032c5e82
TF		 744}
745
dd9c20fa
BK		 746static void disable_sub_crqs(struct ibmvnic_adapter *adapter)
747{
748 int i;
749
750 if (adapter->tx_scrq) {
751 for (i = 0; i < adapter->req_tx_queues; i++)
752 if (adapter->tx_scrq[i])
753 disable_irq(adapter->tx_scrq[i]->irq);
754 }
755
756 if (adapter->rx_scrq) {
757 for (i = 0; i < adapter->req_rx_queues; i++)
758 if (adapter->rx_scrq[i])
759 disable_irq(adapter->rx_scrq[i]->irq);
760 }
761}
762
b41b83e9
NF		 763static void clean_tx_pools(struct ibmvnic_adapter *adapter)
764{
765 struct ibmvnic_tx_pool *tx_pool;
766 u64 tx_entries;
767 int tx_scrqs;
768 int i, j;
769
770 if (!adapter->tx_pool)
771 return;
772
773 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
774 tx_entries = adapter->req_tx_entries_per_subcrq;
775
776 /* Free any remaining skbs in the tx buffer pools */
777 for (i = 0; i < tx_scrqs; i++) {
778 tx_pool = &adapter->tx_pool[i];
779 if (!tx_pool)
780 continue;
781
782 for (j = 0; j < tx_entries; j++) {
783 if (tx_pool->tx_buff[j].skb) {
784 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
785 tx_pool->tx_buff[j].skb = NULL;
786 }
787 }
788 }
789}
790
ed651a10 791static int __ibmvnic_close(struct net_device *netdev)
ea5509f5
JA		 792{
793 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
53da09e9 794 int rc = 0;
ea5509f5
JA		 795 int i;
796
90c8014c 797 adapter->state = VNIC_CLOSING;
ed651a10 798 netif_tx_stop_all_queues(netdev);
b41b83e9
NF		 799
800 clean_tx_pools(adapter);
dd9c20fa 801 disable_sub_crqs(adapter);
ea5509f5 802
3ca19932
NF		 803 if (adapter->napi) {
804 for (i = 0; i < adapter->req_rx_queues; i++)
805 napi_disable(&adapter->napi[i]);
806 }
ea5509f5 807
53da09e9 808 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
ea5509f5 809
90c8014c 810 adapter->state = VNIC_CLOSED;
53da09e9 811 return rc;
032c5e82
TF		 812}
813
ed651a10
NF		 814static int ibmvnic_close(struct net_device *netdev)
815{
816 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
817 int rc;
818
819 mutex_lock(&adapter->reset_lock);
820 rc = __ibmvnic_close(netdev);
821 mutex_unlock(&adapter->reset_lock);
822
823 return rc;
824}
825
ad7775dc
TF		 826/**
827 * build_hdr_data - creates L2/L3/L4 header data buffer
828 * @hdr_field - bitfield determining needed headers
829 * @skb - socket buffer
830 * @hdr_len - array of header lengths
831 * @tot_len - total length of data
832 *
833 * Reads hdr_field to determine which headers are needed by firmware.
834 * Builds a buffer containing these headers. Saves individual header
835 * lengths and total buffer length to be used to build descriptors.
836 */
837static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
838 int *hdr_len, u8 *hdr_data)
839{
840 int len = 0;
841 u8 *hdr;
842
843 hdr_len[0] = sizeof(struct ethhdr);
844
845 if (skb->protocol == htons(ETH_P_IP)) {
846 hdr_len[1] = ip_hdr(skb)->ihl * 4;
847 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
848 hdr_len[2] = tcp_hdrlen(skb);
849 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
850 hdr_len[2] = sizeof(struct udphdr);
851 } else if (skb->protocol == htons(ETH_P_IPV6)) {
852 hdr_len[1] = sizeof(struct ipv6hdr);
853 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
854 hdr_len[2] = tcp_hdrlen(skb);
855 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
856 hdr_len[2] = sizeof(struct udphdr);
857 }
858
859 memset(hdr_data, 0, 120);
860 if ((hdr_field >> 6) & 1) {
861 hdr = skb_mac_header(skb);
862 memcpy(hdr_data, hdr, hdr_len[0]);
863 len += hdr_len[0];
864 }
865
866 if ((hdr_field >> 5) & 1) {
867 hdr = skb_network_header(skb);
868 memcpy(hdr_data + len, hdr, hdr_len[1]);
869 len += hdr_len[1];
870 }
871
872 if ((hdr_field >> 4) & 1) {
873 hdr = skb_transport_header(skb);
874 memcpy(hdr_data + len, hdr, hdr_len[2]);
875 len += hdr_len[2];
876 }
877 return len;
878}
879
880/**
881 * create_hdr_descs - create header and header extension descriptors
882 * @hdr_field - bitfield determining needed headers
883 * @data - buffer containing header data
884 * @len - length of data buffer
885 * @hdr_len - array of individual header lengths
886 * @scrq_arr - descriptor array
887 *
888 * Creates header and, if needed, header extension descriptors and
889 * places them in a descriptor array, scrq_arr
890 */
891
892static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
893 union sub_crq *scrq_arr)
894{
895 union sub_crq hdr_desc;
896 int tmp_len = len;
897 u8 *data, *cur;
898 int tmp;
899
900 while (tmp_len > 0) {
901 cur = hdr_data + len - tmp_len;
902
903 memset(&hdr_desc, 0, sizeof(hdr_desc));
904 if (cur != hdr_data) {
905 data = hdr_desc.hdr_ext.data;
906 tmp = tmp_len > 29 ? 29 : tmp_len;
907 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
908 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
909 hdr_desc.hdr_ext.len = tmp;
910 } else {
911 data = hdr_desc.hdr.data;
912 tmp = tmp_len > 24 ? 24 : tmp_len;
913 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
914 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
915 hdr_desc.hdr.len = tmp;
916 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
917 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
918 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
919 hdr_desc.hdr.flag = hdr_field << 1;
920 }
921 memcpy(data, cur, tmp);
922 tmp_len -= tmp;
923 *scrq_arr = hdr_desc;
924 scrq_arr++;
925 }
926}
927
928/**
929 * build_hdr_descs_arr - build a header descriptor array
930 * @skb - socket buffer
931 * @num_entries - number of descriptors to be sent
932 * @subcrq - first TX descriptor
933 * @hdr_field - bit field determining which headers will be sent
934 *
935 * This function will build a TX descriptor array with applicable
936 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
937 */
938
939static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
940 int *num_entries, u8 hdr_field)
941{
942 int hdr_len[3] = {0, 0, 0};
943 int tot_len, len;
944 u8 *hdr_data = txbuff->hdr_data;
945
946 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
947 txbuff->hdr_data);
948 len = tot_len;
949 len -= 24;
950 if (len > 0)
951 num_entries += len % 29 ? len / 29 + 1 : len / 29;
952 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
953 txbuff->indir_arr + 1);
954}
955
032c5e82
TF		 956static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
957{
958 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
959 int queue_num = skb_get_queue_mapping(skb);
ad7775dc 960 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
032c5e82
TF		 961 struct device *dev = &adapter->vdev->dev;
962 struct ibmvnic_tx_buff *tx_buff = NULL;
142c0ac4 963 struct ibmvnic_sub_crq_queue *tx_scrq;
032c5e82
TF		 964 struct ibmvnic_tx_pool *tx_pool;
965 unsigned int tx_send_failed = 0;
966 unsigned int tx_map_failed = 0;
967 unsigned int tx_dropped = 0;
968 unsigned int tx_packets = 0;
969 unsigned int tx_bytes = 0;
970 dma_addr_t data_dma_addr;
971 struct netdev_queue *txq;
032c5e82
TF		 972 unsigned long lpar_rc;
973 union sub_crq tx_crq;
974 unsigned int offset;
ad7775dc 975 int num_entries = 1;
032c5e82
TF		 976 unsigned char *dst;
977 u64 *handle_array;
978 int index = 0;
979 int ret = 0;
980
981 tx_pool = &adapter->tx_pool[queue_num];
142c0ac4 982 tx_scrq = adapter->tx_scrq[queue_num];
032c5e82
TF		 983 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
984 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
985 be32_to_cpu(adapter->login_rsp_buf->
986 off_txsubm_subcrqs));
ed651a10 987 if (adapter->resetting) {
7f5b0308
TF		 988 if (!netif_subqueue_stopped(netdev, skb))
989 netif_stop_subqueue(netdev, queue_num);
990 dev_kfree_skb_any(skb);
991
032c5e82
TF		 992 tx_send_failed++;
993 tx_dropped++;
7f5b0308 994 ret = NETDEV_TX_OK;
032c5e82
TF		 995 goto out;
996 }
997
998 index = tx_pool->free_map[tx_pool->consumer_index];
999 offset = index * adapter->req_mtu;
1000 dst = tx_pool->long_term_buff.buff + offset;
1001 memset(dst, 0, adapter->req_mtu);
1002 skb_copy_from_linear_data(skb, dst, skb->len);
1003 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1004
1005 tx_pool->consumer_index =
1006 (tx_pool->consumer_index + 1) %
068d9f90 1007 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1008
1009 tx_buff = &tx_pool->tx_buff[index];
1010 tx_buff->skb = skb;
1011 tx_buff->data_dma[0] = data_dma_addr;
1012 tx_buff->data_len[0] = skb->len;
1013 tx_buff->index = index;
1014 tx_buff->pool_index = queue_num;
1015 tx_buff->last_frag = true;
032c5e82
TF		 1016
1017 memset(&tx_crq, 0, sizeof(tx_crq));
1018 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1019 tx_crq.v1.type = IBMVNIC_TX_DESC;
1020 tx_crq.v1.n_crq_elem = 1;
1021 tx_crq.v1.n_sge = 1;
1022 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1023 tx_crq.v1.correlator = cpu_to_be32(index);
1024 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1025 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1026 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1027
1028 if (adapter->vlan_header_insertion) {
1029 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1030 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1031 }
1032
1033 if (skb->protocol == htons(ETH_P_IP)) {
1034 if (ip_hdr(skb)->version == 4)
1035 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1036 else if (ip_hdr(skb)->version == 6)
1037 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1038
1039 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1040 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1041 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1042 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1043 }
1044
ad7775dc 1045 if (skb->ip_summed == CHECKSUM_PARTIAL) {
032c5e82 1046 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
ad7775dc
TF		 1047 hdrs += 2;
1048 }
1049 /* determine if l2/3/4 headers are sent to firmware */
1050 if ((*hdrs >> 7) & 1 &&
1051 (skb->protocol == htons(ETH_P_IP) ||
1052 skb->protocol == htons(ETH_P_IPV6))) {
1053 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1054 tx_crq.v1.n_crq_elem = num_entries;
1055 tx_buff->indir_arr[0] = tx_crq;
1056 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1057 sizeof(tx_buff->indir_arr),
1058 DMA_TO_DEVICE);
1059 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
7f5b0308
TF		 1060 dev_kfree_skb_any(skb);
1061 tx_buff->skb = NULL;
ad7775dc
TF		 1062 if (!firmware_has_feature(FW_FEATURE_CMO))
1063 dev_err(dev, "tx: unable to map descriptor array\n");
1064 tx_map_failed++;
1065 tx_dropped++;
7f5b0308 1066 ret = NETDEV_TX_OK;
ad7775dc
TF		 1067 goto out;
1068 }
498cd8e4 1069 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
ad7775dc
TF		 1070 (u64)tx_buff->indir_dma,
1071 (u64)num_entries);
1072 } else {
498cd8e4
JA		 1073 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1074 &tx_crq);
ad7775dc 1075 }
032c5e82
TF		 1076 if (lpar_rc != H_SUCCESS) {
1077 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1078
1079 if (tx_pool->consumer_index == 0)
1080 tx_pool->consumer_index =
068d9f90 1081 adapter->req_tx_entries_per_subcrq - 1;
032c5e82
TF		 1082 else
1083 tx_pool->consumer_index--;
1084
7f5b0308
TF		 1085 dev_kfree_skb_any(skb);
1086 tx_buff->skb = NULL;
1087
1088 if (lpar_rc == H_CLOSED)
1089 netif_stop_subqueue(netdev, queue_num);
1090
032c5e82
TF		 1091 tx_send_failed++;
1092 tx_dropped++;
7f5b0308 1093 ret = NETDEV_TX_OK;
032c5e82
TF		 1094 goto out;
1095 }
142c0ac4 1096
58c8c0c0
BK		 1097 if (atomic_inc_return(&tx_scrq->used)
1098 >= adapter->req_tx_entries_per_subcrq) {
142c0ac4
TF		 1099 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1100 netif_stop_subqueue(netdev, queue_num);
1101 }
1102
032c5e82
TF		 1103 tx_packets++;
1104 tx_bytes += skb->len;
1105 txq->trans_start = jiffies;
1106 ret = NETDEV_TX_OK;
1107
1108out:
1109 netdev->stats.tx_dropped += tx_dropped;
1110 netdev->stats.tx_bytes += tx_bytes;
1111 netdev->stats.tx_packets += tx_packets;
1112 adapter->tx_send_failed += tx_send_failed;
1113 adapter->tx_map_failed += tx_map_failed;
1114
1115 return ret;
1116}
1117
1118static void ibmvnic_set_multi(struct net_device *netdev)
1119{
1120 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1121 struct netdev_hw_addr *ha;
1122 union ibmvnic_crq crq;
1123
1124 memset(&crq, 0, sizeof(crq));
1125 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1126 crq.request_capability.cmd = REQUEST_CAPABILITY;
1127
1128 if (netdev->flags & IFF_PROMISC) {
1129 if (!adapter->promisc_supported)
1130 return;
1131 } else {
1132 if (netdev->flags & IFF_ALLMULTI) {
1133 /* Accept all multicast */
1134 memset(&crq, 0, sizeof(crq));
1135 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1136 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1137 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1138 ibmvnic_send_crq(adapter, &crq);
1139 } else if (netdev_mc_empty(netdev)) {
1140 /* Reject all multicast */
1141 memset(&crq, 0, sizeof(crq));
1142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1143 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1144 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1145 ibmvnic_send_crq(adapter, &crq);
1146 } else {
1147 /* Accept one or more multicast(s) */
1148 netdev_for_each_mc_addr(ha, netdev) {
1149 memset(&crq, 0, sizeof(crq));
1150 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1151 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1152 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1153 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1154 ha->addr);
1155 ibmvnic_send_crq(adapter, &crq);
1156 }
1157 }
1158 }
1159}
1160
1161static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1162{
1163 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1164 struct sockaddr *addr = p;
1165 union ibmvnic_crq crq;
1166
1167 if (!is_valid_ether_addr(addr->sa_data))
1168 return -EADDRNOTAVAIL;
1169
1170 memset(&crq, 0, sizeof(crq));
1171 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1172 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1173 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1174 ibmvnic_send_crq(adapter, &crq);
1175 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1176 return 0;
1177}
1178
ed651a10
NF		 1179/**
1180 * do_reset returns zero if we are able to keep processing reset events, or
1181 * non-zero if we hit a fatal error and must halt.
1182 */
1183static int do_reset(struct ibmvnic_adapter *adapter,
1184 struct ibmvnic_rwi *rwi, u32 reset_state)
032c5e82 1185{
ed651a10
NF		 1186 struct net_device *netdev = adapter->netdev;
1187 int i, rc;
1188
1189 netif_carrier_off(netdev);
1190 adapter->reset_reason = rwi->reset_reason;
1191
1192 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1193 rc = ibmvnic_reenable_crq_queue(adapter);
1194 if (rc)
1195 return 0;
1196 }
1197
1198 rc = __ibmvnic_close(netdev);
1199 if (rc)
1200 return rc;
1201
1202 /* remove the closed state so when we call open it appears
1203 * we are coming from the probed state.
1204 */
1205 adapter->state = VNIC_PROBED;
032c5e82 1206
ed651a10 1207 release_resources(adapter);
032c5e82 1208 release_sub_crqs(adapter);
ed651a10
NF		 1209 release_crq_queue(adapter);
1210
1211 rc = ibmvnic_init(adapter);
032c5e82 1212 if (rc)
ed651a10
NF		 1213 return 0;
1214
1215 /* If the adapter was in PROBE state prior to the reset, exit here. */
1216 if (reset_state == VNIC_PROBED)
1217 return 0;
1218
1219 rc = ibmvnic_login(netdev);
1220 if (rc) {
1221 adapter->state = VNIC_PROBED;
1222 return 0;
1223 }
1224
1225 rtnl_lock();
1226 rc = init_resources(adapter);
1227 rtnl_unlock();
1228 if (rc)
1229 return rc;
1230
1231 if (reset_state == VNIC_CLOSED)
1232 return 0;
1233
1234 rc = __ibmvnic_open(netdev);
1235 if (rc) {
1236 if (list_empty(&adapter->rwi_list))
1237 adapter->state = VNIC_CLOSED;
1238 else
1239 adapter->state = reset_state;
1240
1241 return 0;
1242 }
1243
1244 netif_carrier_on(netdev);
1245
1246 /* kick napi */
1247 for (i = 0; i < adapter->req_rx_queues; i++)
1248 napi_schedule(&adapter->napi[i]);
1249
1250 return 0;
1251}
1252
1253static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1254{
1255 struct ibmvnic_rwi *rwi;
1256
1257 mutex_lock(&adapter->rwi_lock);
1258
1259 if (!list_empty(&adapter->rwi_list)) {
1260 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1261 list);
1262 list_del(&rwi->list);
1263 } else {
1264 rwi = NULL;
1265 }
1266
1267 mutex_unlock(&adapter->rwi_lock);
1268 return rwi;
1269}
1270
1271static void free_all_rwi(struct ibmvnic_adapter *adapter)
1272{
1273 struct ibmvnic_rwi *rwi;
1274
1275 rwi = get_next_rwi(adapter);
1276 while (rwi) {
1277 kfree(rwi);
1278 rwi = get_next_rwi(adapter);
1279 }
1280}
1281
1282static void __ibmvnic_reset(struct work_struct *work)
1283{
1284 struct ibmvnic_rwi *rwi;
1285 struct ibmvnic_adapter *adapter;
1286 struct net_device *netdev;
1287 u32 reset_state;
1288 int rc;
1289
1290 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1291 netdev = adapter->netdev;
1292
1293 mutex_lock(&adapter->reset_lock);
1294 adapter->resetting = true;
1295 reset_state = adapter->state;
1296
1297 rwi = get_next_rwi(adapter);
1298 while (rwi) {
1299 rc = do_reset(adapter, rwi, reset_state);
1300 kfree(rwi);
1301 if (rc)
1302 break;
1303
1304 rwi = get_next_rwi(adapter);
1305 }
1306
1307 if (rc) {
1308 free_all_rwi(adapter);
1309 return;
1310 }
1311
1312 adapter->resetting = false;
1313 mutex_unlock(&adapter->reset_lock);
1314}
1315
1316static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1317 enum ibmvnic_reset_reason reason)
1318{
1319 struct ibmvnic_rwi *rwi, *tmp;
1320 struct net_device *netdev = adapter->netdev;
1321 struct list_head *entry;
1322
1323 if (adapter->state == VNIC_REMOVING ||
1324 adapter->state == VNIC_REMOVED) {
1325 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1326 return;
1327 }
1328
1329 mutex_lock(&adapter->rwi_lock);
1330
1331 list_for_each(entry, &adapter->rwi_list) {
1332 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1333 if (tmp->reset_reason == reason) {
1334 netdev_err(netdev, "Matching reset found, skipping\n");
1335 mutex_unlock(&adapter->rwi_lock);
1336 return;
1337 }
1338 }
1339
1340 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1341 if (!rwi) {
1342 mutex_unlock(&adapter->rwi_lock);
1343 ibmvnic_close(netdev);
1344 return;
1345 }
1346
1347 rwi->reset_reason = reason;
1348 list_add_tail(&rwi->list, &adapter->rwi_list);
1349 mutex_unlock(&adapter->rwi_lock);
1350 schedule_work(&adapter->ibmvnic_reset);
1351}
1352
1353static void ibmvnic_tx_timeout(struct net_device *dev)
1354{
1355 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1356
1357 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
032c5e82
TF		 1358}
1359
1360static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1361 struct ibmvnic_rx_buff *rx_buff)
1362{
1363 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1364
1365 rx_buff->skb = NULL;
1366
1367 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1368 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1369
1370 atomic_dec(&pool->available);
1371}
1372
1373static int ibmvnic_poll(struct napi_struct *napi, int budget)
1374{
1375 struct net_device *netdev = napi->dev;
1376 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1377 int scrq_num = (int)(napi - adapter->napi);
1378 int frames_processed = 0;
1379restart_poll:
1380 while (frames_processed < budget) {
1381 struct sk_buff *skb;
1382 struct ibmvnic_rx_buff *rx_buff;
1383 union sub_crq *next;
1384 u32 length;
1385 u16 offset;
1386 u8 flags = 0;
1387
1388 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1389 break;
1390 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1391 rx_buff =
1392 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1393 rx_comp.correlator);
1394 /* do error checking */
1395 if (next->rx_comp.rc) {
1396 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1397 /* free the entry */
1398 next->rx_comp.first = 0;
1399 remove_buff_from_pool(adapter, rx_buff);
1400 break;
1401 }
1402
1403 length = be32_to_cpu(next->rx_comp.len);
1404 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1405 flags = next->rx_comp.flags;
1406 skb = rx_buff->skb;
1407 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1408 length);
6052d5e2
MFV		 1409
1410 /* VLAN Header has been stripped by the system firmware and
1411 * needs to be inserted by the driver
1412 */
1413 if (adapter->rx_vlan_header_insertion &&
1414 (flags & IBMVNIC_VLAN_STRIPPED))
1415 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1416 ntohs(next->rx_comp.vlan_tci));
1417
032c5e82
TF		 1418 /* free the entry */
1419 next->rx_comp.first = 0;
1420 remove_buff_from_pool(adapter, rx_buff);
1421
1422 skb_put(skb, length);
1423 skb->protocol = eth_type_trans(skb, netdev);
1424
1425 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1426 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1427 skb->ip_summed = CHECKSUM_UNNECESSARY;
1428 }
1429
1430 length = skb->len;
1431 napi_gro_receive(napi, skb); /* send it up */
1432 netdev->stats.rx_packets++;
1433 netdev->stats.rx_bytes += length;
1434 frames_processed++;
1435 }
498cd8e4 1436 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
032c5e82
TF		 1437
1438 if (frames_processed < budget) {
1439 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
6ad20165 1440 napi_complete_done(napi, frames_processed);
032c5e82
TF		 1441 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1442 napi_reschedule(napi)) {
1443 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1444 goto restart_poll;
1445 }
1446 }
1447 return frames_processed;
1448}
1449
1450#ifdef CONFIG_NET_POLL_CONTROLLER
1451static void ibmvnic_netpoll_controller(struct net_device *dev)
1452{
1453 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1454 int i;
1455
1456 replenish_pools(netdev_priv(dev));
1457 for (i = 0; i < adapter->req_rx_queues; i++)
1458 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1459 adapter->rx_scrq[i]);
1460}
1461#endif
1462
1463static const struct net_device_ops ibmvnic_netdev_ops = {
1464 .ndo_open = ibmvnic_open,
1465 .ndo_stop = ibmvnic_close,
1466 .ndo_start_xmit = ibmvnic_xmit,
1467 .ndo_set_rx_mode = ibmvnic_set_multi,
1468 .ndo_set_mac_address = ibmvnic_set_mac,
1469 .ndo_validate_addr = eth_validate_addr,
032c5e82
TF		 1470 .ndo_tx_timeout = ibmvnic_tx_timeout,
1471#ifdef CONFIG_NET_POLL_CONTROLLER
1472 .ndo_poll_controller = ibmvnic_netpoll_controller,
1473#endif
1474};
1475
1476/* ethtool functions */
1477
8a43379f
PR		 1478static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1479 struct ethtool_link_ksettings *cmd)
032c5e82 1480{
8a43379f
PR		 1481 u32 supported, advertising;
1482
1483 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
032c5e82 1484 SUPPORTED_FIBRE);
8a43379f 1485 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
032c5e82 1486 ADVERTISED_FIBRE);
8a43379f
PR		 1487 cmd->base.speed = SPEED_1000;
1488 cmd->base.duplex = DUPLEX_FULL;
1489 cmd->base.port = PORT_FIBRE;
1490 cmd->base.phy_address = 0;
1491 cmd->base.autoneg = AUTONEG_ENABLE;
1492
1493 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1494 supported);
1495 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1496 advertising);
1497
032c5e82
TF		 1498 return 0;
1499}
1500
1501static void ibmvnic_get_drvinfo(struct net_device *dev,
1502 struct ethtool_drvinfo *info)
1503{
1504 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1505 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1506}
1507
1508static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1509{
1510 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1511
1512 return adapter->msg_enable;
1513}
1514
1515static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1516{
1517 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1518
1519 adapter->msg_enable = data;
1520}
1521
1522static u32 ibmvnic_get_link(struct net_device *netdev)
1523{
1524 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1525
1526 /* Don't need to send a query because we request a logical link up at
1527 * init and then we wait for link state indications
1528 */
1529 return adapter->logical_link_state;
1530}
1531
1532static void ibmvnic_get_ringparam(struct net_device *netdev,
1533 struct ethtool_ringparam *ring)
1534{
1535 ring->rx_max_pending = 0;
1536 ring->tx_max_pending = 0;
1537 ring->rx_mini_max_pending = 0;
1538 ring->rx_jumbo_max_pending = 0;
1539 ring->rx_pending = 0;
1540 ring->tx_pending = 0;
1541 ring->rx_mini_pending = 0;
1542 ring->rx_jumbo_pending = 0;
1543}
1544
1545static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1546{
1547 int i;
1548
1549 if (stringset != ETH_SS_STATS)
1550 return;
1551
1552 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1553 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1554}
1555
1556static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1557{
1558 switch (sset) {
1559 case ETH_SS_STATS:
1560 return ARRAY_SIZE(ibmvnic_stats);
1561 default:
1562 return -EOPNOTSUPP;
1563 }
1564}
1565
1566static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1567 struct ethtool_stats *stats, u64 *data)
1568{
1569 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1570 union ibmvnic_crq crq;
1571 int i;
1572
1573 memset(&crq, 0, sizeof(crq));
1574 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1575 crq.request_statistics.cmd = REQUEST_STATISTICS;
1576 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1577 crq.request_statistics.len =
1578 cpu_to_be32(sizeof(struct ibmvnic_statistics));
032c5e82
TF		 1579
1580 /* Wait for data to be written */
1581 init_completion(&adapter->stats_done);
db5d0b59 1582 ibmvnic_send_crq(adapter, &crq);
032c5e82
TF		 1583 wait_for_completion(&adapter->stats_done);
1584
1585 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1586 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1587}
1588
1589static const struct ethtool_ops ibmvnic_ethtool_ops = {
032c5e82
TF		 1590 .get_drvinfo = ibmvnic_get_drvinfo,
1591 .get_msglevel = ibmvnic_get_msglevel,
1592 .set_msglevel = ibmvnic_set_msglevel,
1593 .get_link = ibmvnic_get_link,
1594 .get_ringparam = ibmvnic_get_ringparam,
1595 .get_strings = ibmvnic_get_strings,
1596 .get_sset_count = ibmvnic_get_sset_count,
1597 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
8a43379f 1598 .get_link_ksettings = ibmvnic_get_link_ksettings,
032c5e82
TF		 1599};
1600
1601/* Routines for managing CRQs/sCRQs */
1602
1603static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1604 struct ibmvnic_sub_crq_queue *scrq)
1605{
1606 struct device *dev = &adapter->vdev->dev;
1607 long rc;
1608
1609 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1610
1611 /* Close the sub-crqs */
1612 do {
1613 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1614 adapter->vdev->unit_address,
1615 scrq->crq_num);
1616 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1617
ffa73855
TF		 1618 if (rc) {
1619 netdev_err(adapter->netdev,
1620 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1621 scrq->crq_num, rc);
1622 }
1623
032c5e82
TF		 1624 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1625 DMA_BIDIRECTIONAL);
1626 free_pages((unsigned long)scrq->msgs, 2);
1627 kfree(scrq);
1628}
1629
1630static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1631 *adapter)
1632{
1633 struct device *dev = &adapter->vdev->dev;
1634 struct ibmvnic_sub_crq_queue *scrq;
1635 int rc;
1636
1bb3c739 1637 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
032c5e82
TF		 1638 if (!scrq)
1639 return NULL;
1640
7f7adc50 1641 scrq->msgs =
1bb3c739 1642 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
032c5e82
TF		 1643 if (!scrq->msgs) {
1644 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1645 goto zero_page_failed;
1646 }
1647
1648 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1649 DMA_BIDIRECTIONAL);
1650 if (dma_mapping_error(dev, scrq->msg_token)) {
1651 dev_warn(dev, "Couldn't map crq queue messages page\n");
1652 goto map_failed;
1653 }
1654
1655 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1656 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1657
1658 if (rc == H_RESOURCE)
1659 rc = ibmvnic_reset_crq(adapter);
1660
1661 if (rc == H_CLOSED) {
1662 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1663 } else if (rc) {
1664 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1665 goto reg_failed;
1666 }
1667
032c5e82
TF		 1668 scrq->adapter = adapter;
1669 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
032c5e82
TF		 1670 spin_lock_init(&scrq->lock);
1671
1672 netdev_dbg(adapter->netdev,
1673 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1674 scrq->crq_num, scrq->hw_irq, scrq->irq);
1675
1676 return scrq;
1677
032c5e82
TF		 1678reg_failed:
1679 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1680 DMA_BIDIRECTIONAL);
1681map_failed:
1682 free_pages((unsigned long)scrq->msgs, 2);
1683zero_page_failed:
1684 kfree(scrq);
1685
1686 return NULL;
1687}
1688
1689static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1690{
1691 int i;
1692
1693 if (adapter->tx_scrq) {
b510888f
NF		 1694 for (i = 0; i < adapter->req_tx_queues; i++) {
1695 if (!adapter->tx_scrq[i])
1696 continue;
1697
1698 if (adapter->tx_scrq[i]->irq) {
032c5e82
TF		 1699 free_irq(adapter->tx_scrq[i]->irq,
1700 adapter->tx_scrq[i]);
88eb98a0 1701 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
b510888f 1702 adapter->tx_scrq[i]->irq = 0;
032c5e82 1703 }
b510888f
NF		 1704
1705 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1706 }
1707
9501df3c 1708 kfree(adapter->tx_scrq);
032c5e82
TF		 1709 adapter->tx_scrq = NULL;
1710 }
1711
1712 if (adapter->rx_scrq) {
b510888f
NF		 1713 for (i = 0; i < adapter->req_rx_queues; i++) {
1714 if (!adapter->rx_scrq[i])
1715 continue;
1716
1717 if (adapter->rx_scrq[i]->irq) {
032c5e82
TF		 1718 free_irq(adapter->rx_scrq[i]->irq,
1719 adapter->rx_scrq[i]);
88eb98a0 1720 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
b510888f 1721 adapter->rx_scrq[i]->irq = 0;
032c5e82 1722 }
032c5e82 1723
b510888f
NF		 1724 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1725 }
ea22d51a 1726
b510888f 1727 kfree(adapter->rx_scrq);
ea22d51a
TF		 1728 adapter->rx_scrq = NULL;
1729 }
ea22d51a
TF		 1730}
1731
032c5e82
TF		 1732static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1733 struct ibmvnic_sub_crq_queue *scrq)
1734{
1735 struct device *dev = &adapter->vdev->dev;
1736 unsigned long rc;
1737
1738 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1739 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1740 if (rc)
1741 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1742 scrq->hw_irq, rc);
1743 return rc;
1744}
1745
1746static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1747 struct ibmvnic_sub_crq_queue *scrq)
1748{
1749 struct device *dev = &adapter->vdev->dev;
1750 unsigned long rc;
1751
1752 if (scrq->hw_irq > 0x100000000ULL) {
1753 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1754 return 1;
1755 }
1756
1757 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1758 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1759 if (rc)
1760 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1761 scrq->hw_irq, rc);
1762 return rc;
1763}
1764
1765static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1766 struct ibmvnic_sub_crq_queue *scrq)
1767{
1768 struct device *dev = &adapter->vdev->dev;
1769 struct ibmvnic_tx_buff *txbuff;
1770 union sub_crq *next;
1771 int index;
1772 int i, j;
ad7775dc 1773 u8 first;
032c5e82
TF		 1774
1775restart_loop:
1776 while (pending_scrq(adapter, scrq)) {
1777 unsigned int pool = scrq->pool_index;
1778
1779 next = ibmvnic_next_scrq(adapter, scrq);
1780 for (i = 0; i < next->tx_comp.num_comps; i++) {
1781 if (next->tx_comp.rcs[i]) {
1782 dev_err(dev, "tx error %x\n",
1783 next->tx_comp.rcs[i]);
1784 continue;
1785 }
1786 index = be32_to_cpu(next->tx_comp.correlators[i]);
1787 txbuff = &adapter->tx_pool[pool].tx_buff[index];
1788
1789 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1790 if (!txbuff->data_dma[j])
1791 continue;
1792
1793 txbuff->data_dma[j] = 0;
032c5e82 1794 }
ad7775dc
TF		 1795 /* if sub_crq was sent indirectly */
1796 first = txbuff->indir_arr[0].generic.first;
1797 if (first == IBMVNIC_CRQ_CMD) {
1798 dma_unmap_single(dev, txbuff->indir_dma,
1799 sizeof(txbuff->indir_arr),
1800 DMA_TO_DEVICE);
1801 }
032c5e82 1802
142c0ac4 1803 if (txbuff->last_frag) {
58c8c0c0
BK		 1804 if (atomic_sub_return(next->tx_comp.num_comps,
1805 &scrq->used) <=
142c0ac4
TF		 1806 (adapter->req_tx_entries_per_subcrq / 2) &&
1807 netif_subqueue_stopped(adapter->netdev,
1808 txbuff->skb)) {
1809 netif_wake_subqueue(adapter->netdev,
1810 scrq->pool_index);
1811 netdev_dbg(adapter->netdev,
1812 "Started queue %d\n",
1813 scrq->pool_index);
1814 }
1815
032c5e82 1816 dev_kfree_skb_any(txbuff->skb);
142c0ac4 1817 }
032c5e82
TF		 1818
1819 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1820 producer_index] = index;
1821 adapter->tx_pool[pool].producer_index =
1822 (adapter->tx_pool[pool].producer_index + 1) %
068d9f90 1823 adapter->req_tx_entries_per_subcrq;
032c5e82
TF		 1824 }
1825 /* remove tx_comp scrq*/
1826 next->tx_comp.first = 0;
1827 }
1828
1829 enable_scrq_irq(adapter, scrq);
1830
1831 if (pending_scrq(adapter, scrq)) {
1832 disable_scrq_irq(adapter, scrq);
1833 goto restart_loop;
1834 }
1835
1836 return 0;
1837}
1838
1839static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1840{
1841 struct ibmvnic_sub_crq_queue *scrq = instance;
1842 struct ibmvnic_adapter *adapter = scrq->adapter;
1843
1844 disable_scrq_irq(adapter, scrq);
1845 ibmvnic_complete_tx(adapter, scrq);
1846
1847 return IRQ_HANDLED;
1848}
1849
1850static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1851{
1852 struct ibmvnic_sub_crq_queue *scrq = instance;
1853 struct ibmvnic_adapter *adapter = scrq->adapter;
1854
1855 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1856 disable_scrq_irq(adapter, scrq);
1857 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1858 }
1859
1860 return IRQ_HANDLED;
1861}
1862
ea22d51a
TF		 1863static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1864{
1865 struct device *dev = &adapter->vdev->dev;
1866 struct ibmvnic_sub_crq_queue *scrq;
1867 int i = 0, j = 0;
1868 int rc = 0;
1869
1870 for (i = 0; i < adapter->req_tx_queues; i++) {
1871 scrq = adapter->tx_scrq[i];
1872 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1873
99c1790e 1874 if (!scrq->irq) {
ea22d51a
TF		 1875 rc = -EINVAL;
1876 dev_err(dev, "Error mapping irq\n");
1877 goto req_tx_irq_failed;
1878 }
1879
1880 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1881 0, "ibmvnic_tx", scrq);
1882
1883 if (rc) {
1884 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1885 scrq->irq, rc);
1886 irq_dispose_mapping(scrq->irq);
1887 goto req_rx_irq_failed;
1888 }
1889 }
1890
1891 for (i = 0; i < adapter->req_rx_queues; i++) {
1892 scrq = adapter->rx_scrq[i];
1893 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
99c1790e 1894 if (!scrq->irq) {
ea22d51a
TF		 1895 rc = -EINVAL;
1896 dev_err(dev, "Error mapping irq\n");
1897 goto req_rx_irq_failed;
1898 }
1899 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1900 0, "ibmvnic_rx", scrq);
1901 if (rc) {
1902 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1903 scrq->irq, rc);
1904 irq_dispose_mapping(scrq->irq);
1905 goto req_rx_irq_failed;
1906 }
1907 }
1908 return rc;
1909
1910req_rx_irq_failed:
8bf371e6 1911 for (j = 0; j < i; j++) {
ea22d51a
TF		 1912 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1913 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1914 }
ea22d51a
TF		 1915 i = adapter->req_tx_queues;
1916req_tx_irq_failed:
8bf371e6 1917 for (j = 0; j < i; j++) {
ea22d51a
TF		 1918 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1919 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
8bf371e6 1920 }
b510888f 1921 release_sub_crqs(adapter);
ea22d51a
TF		 1922 return rc;
1923}
1924
d346b9bc 1925static int init_sub_crqs(struct ibmvnic_adapter *adapter)
032c5e82
TF		 1926{
1927 struct device *dev = &adapter->vdev->dev;
1928 struct ibmvnic_sub_crq_queue **allqueues;
1929 int registered_queues = 0;
032c5e82
TF		 1930 int total_queues;
1931 int more = 0;
ea22d51a 1932 int i;
032c5e82 1933
032c5e82
TF		 1934 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1935
1bb3c739 1936 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
032c5e82 1937 if (!allqueues)
d346b9bc 1938 return -1;
032c5e82
TF		 1939
1940 for (i = 0; i < total_queues; i++) {
1941 allqueues[i] = init_sub_crq_queue(adapter);
1942 if (!allqueues[i]) {
1943 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1944 break;
1945 }
1946 registered_queues++;
1947 }
1948
1949 /* Make sure we were able to register the minimum number of queues */
1950 if (registered_queues <
1951 adapter->min_tx_queues + adapter->min_rx_queues) {
1952 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
1953 goto tx_failed;
1954 }
1955
1956 /* Distribute the failed allocated queues*/
1957 for (i = 0; i < total_queues - registered_queues + more ; i++) {
1958 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1959 switch (i % 3) {
1960 case 0:
1961 if (adapter->req_rx_queues > adapter->min_rx_queues)
1962 adapter->req_rx_queues--;
1963 else
1964 more++;
1965 break;
1966 case 1:
1967 if (adapter->req_tx_queues > adapter->min_tx_queues)
1968 adapter->req_tx_queues--;
1969 else
1970 more++;
1971 break;
1972 }
1973 }
1974
1975 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1bb3c739 1976 sizeof(*adapter->tx_scrq), GFP_KERNEL);
032c5e82
TF		 1977 if (!adapter->tx_scrq)
1978 goto tx_failed;
1979
1980 for (i = 0; i < adapter->req_tx_queues; i++) {
1981 adapter->tx_scrq[i] = allqueues[i];
1982 adapter->tx_scrq[i]->pool_index = i;
032c5e82
TF		 1983 }
1984
1985 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1bb3c739 1986 sizeof(*adapter->rx_scrq), GFP_KERNEL);
032c5e82
TF		 1987 if (!adapter->rx_scrq)
1988 goto rx_failed;
1989
1990 for (i = 0; i < adapter->req_rx_queues; i++) {
1991 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1992 adapter->rx_scrq[i]->scrq_num = i;
032c5e82
TF		 1993 }
1994
d346b9bc
NF		 1995 kfree(allqueues);
1996 return 0;
1997
1998rx_failed:
1999 kfree(adapter->tx_scrq);
2000 adapter->tx_scrq = NULL;
2001tx_failed:
2002 for (i = 0; i < registered_queues; i++)
2003 release_sub_crq_queue(adapter, allqueues[i]);
2004 kfree(allqueues);
2005 return -1;
2006}
2007
2008static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2009{
2010 struct device *dev = &adapter->vdev->dev;
2011 union ibmvnic_crq crq;
d346b9bc
NF		 2012
2013 if (!retry) {
2014 /* Sub-CRQ entries are 32 byte long */
2015 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2016
2017 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2018 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2019 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2020 return;
2021 }
2022
2023 /* Get the minimum between the queried max and the entries
2024 * that fit in our PAGE_SIZE
2025 */
2026 adapter->req_tx_entries_per_subcrq =
2027 adapter->max_tx_entries_per_subcrq > entries_page ?
2028 entries_page : adapter->max_tx_entries_per_subcrq;
2029 adapter->req_rx_add_entries_per_subcrq =
2030 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2031 entries_page : adapter->max_rx_add_entries_per_subcrq;
2032
2033 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2034 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2035 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2036
2037 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2038 }
2039
032c5e82
TF		 2040 memset(&crq, 0, sizeof(crq));
2041 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2042 crq.request_capability.cmd = REQUEST_CAPABILITY;
2043
2044 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
de89e854 2045 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
901e040a 2046 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2047 ibmvnic_send_crq(adapter, &crq);
2048
2049 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
de89e854 2050 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
901e040a 2051 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2052 ibmvnic_send_crq(adapter, &crq);
2053
2054 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
de89e854 2055 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
901e040a 2056 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2057 ibmvnic_send_crq(adapter, &crq);
2058
2059 crq.request_capability.capability =
2060 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2061 crq.request_capability.number =
de89e854 2062 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
901e040a 2063 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2064 ibmvnic_send_crq(adapter, &crq);
2065
2066 crq.request_capability.capability =
2067 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2068 crq.request_capability.number =
de89e854 2069 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
901e040a 2070 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2071 ibmvnic_send_crq(adapter, &crq);
2072
2073 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
de89e854 2074 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
901e040a 2075 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2076 ibmvnic_send_crq(adapter, &crq);
2077
2078 if (adapter->netdev->flags & IFF_PROMISC) {
2079 if (adapter->promisc_supported) {
2080 crq.request_capability.capability =
2081 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2082 crq.request_capability.number = cpu_to_be64(1);
901e040a 2083 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2084 ibmvnic_send_crq(adapter, &crq);
2085 }
2086 } else {
2087 crq.request_capability.capability =
2088 cpu_to_be16(PROMISC_REQUESTED);
de89e854 2089 crq.request_capability.number = cpu_to_be64(0);
901e040a 2090 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2091 ibmvnic_send_crq(adapter, &crq);
2092 }
032c5e82
TF		 2093}
2094
2095static int pending_scrq(struct ibmvnic_adapter *adapter,
2096 struct ibmvnic_sub_crq_queue *scrq)
2097{
2098 union sub_crq *entry = &scrq->msgs[scrq->cur];
2099
90c8014c
NF		 2100 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2101 adapter->state == VNIC_CLOSING)
032c5e82
TF		 2102 return 1;
2103 else
2104 return 0;
2105}
2106
2107static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2108 struct ibmvnic_sub_crq_queue *scrq)
2109{
2110 union sub_crq *entry;
2111 unsigned long flags;
2112
2113 spin_lock_irqsave(&scrq->lock, flags);
2114 entry = &scrq->msgs[scrq->cur];
2115 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2116 if (++scrq->cur == scrq->size)
2117 scrq->cur = 0;
2118 } else {
2119 entry = NULL;
2120 }
2121 spin_unlock_irqrestore(&scrq->lock, flags);
2122
2123 return entry;
2124}
2125
2126static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2127{
2128 struct ibmvnic_crq_queue *queue = &adapter->crq;
2129 union ibmvnic_crq *crq;
2130
2131 crq = &queue->msgs[queue->cur];
2132 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2133 if (++queue->cur == queue->size)
2134 queue->cur = 0;
2135 } else {
2136 crq = NULL;
2137 }
2138
2139 return crq;
2140}
2141
2142static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2143 union sub_crq *sub_crq)
2144{
2145 unsigned int ua = adapter->vdev->unit_address;
2146 struct device *dev = &adapter->vdev->dev;
2147 u64 *u64_crq = (u64 *)sub_crq;
2148 int rc;
2149
2150 netdev_dbg(adapter->netdev,
2151 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2152 (unsigned long int)cpu_to_be64(remote_handle),
2153 (unsigned long int)cpu_to_be64(u64_crq[0]),
2154 (unsigned long int)cpu_to_be64(u64_crq[1]),
2155 (unsigned long int)cpu_to_be64(u64_crq[2]),
2156 (unsigned long int)cpu_to_be64(u64_crq[3]));
2157
2158 /* Make sure the hypervisor sees the complete request */
2159 mb();
2160
2161 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2162 cpu_to_be64(remote_handle),
2163 cpu_to_be64(u64_crq[0]),
2164 cpu_to_be64(u64_crq[1]),
2165 cpu_to_be64(u64_crq[2]),
2166 cpu_to_be64(u64_crq[3]));
2167
2168 if (rc) {
2169 if (rc == H_CLOSED)
2170 dev_warn(dev, "CRQ Queue closed\n");
2171 dev_err(dev, "Send error (rc=%d)\n", rc);
2172 }
2173
2174 return rc;
2175}
2176
ad7775dc
TF		 2177static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2178 u64 remote_handle, u64 ioba, u64 num_entries)
2179{
2180 unsigned int ua = adapter->vdev->unit_address;
2181 struct device *dev = &adapter->vdev->dev;
2182 int rc;
2183
2184 /* Make sure the hypervisor sees the complete request */
2185 mb();
2186 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2187 cpu_to_be64(remote_handle),
2188 ioba, num_entries);
2189
2190 if (rc) {
2191 if (rc == H_CLOSED)
2192 dev_warn(dev, "CRQ Queue closed\n");
2193 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2194 }
2195
2196 return rc;
2197}
2198
032c5e82
TF		 2199static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2200 union ibmvnic_crq *crq)
2201{
2202 unsigned int ua = adapter->vdev->unit_address;
2203 struct device *dev = &adapter->vdev->dev;
2204 u64 *u64_crq = (u64 *)crq;
2205 int rc;
2206
2207 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2208 (unsigned long int)cpu_to_be64(u64_crq[0]),
2209 (unsigned long int)cpu_to_be64(u64_crq[1]));
2210
2211 /* Make sure the hypervisor sees the complete request */
2212 mb();
2213
2214 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2215 cpu_to_be64(u64_crq[0]),
2216 cpu_to_be64(u64_crq[1]));
2217
2218 if (rc) {
2219 if (rc == H_CLOSED)
2220 dev_warn(dev, "CRQ Queue closed\n");
2221 dev_warn(dev, "Send error (rc=%d)\n", rc);
2222 }
2223
2224 return rc;
2225}
2226
2227static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2228{
2229 union ibmvnic_crq crq;
2230
2231 memset(&crq, 0, sizeof(crq));
2232 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2233 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2234 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2235
2236 return ibmvnic_send_crq(adapter, &crq);
2237}
2238
032c5e82
TF		 2239static int send_version_xchg(struct ibmvnic_adapter *adapter)
2240{
2241 union ibmvnic_crq crq;
2242
2243 memset(&crq, 0, sizeof(crq));
2244 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2245 crq.version_exchange.cmd = VERSION_EXCHANGE;
2246 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2247
2248 return ibmvnic_send_crq(adapter, &crq);
2249}
2250
2251static void send_login(struct ibmvnic_adapter *adapter)
2252{
2253 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2254 struct ibmvnic_login_buffer *login_buffer;
032c5e82
TF		 2255 struct device *dev = &adapter->vdev->dev;
2256 dma_addr_t rsp_buffer_token;
2257 dma_addr_t buffer_token;
2258 size_t rsp_buffer_size;
2259 union ibmvnic_crq crq;
032c5e82
TF		 2260 size_t buffer_size;
2261 __be64 *tx_list_p;
2262 __be64 *rx_list_p;
2263 int i;
2264
2265 buffer_size =
2266 sizeof(struct ibmvnic_login_buffer) +
2267 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2268
2269 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2270 if (!login_buffer)
2271 goto buf_alloc_failed;
2272
2273 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2274 DMA_TO_DEVICE);
2275 if (dma_mapping_error(dev, buffer_token)) {
2276 dev_err(dev, "Couldn't map login buffer\n");
2277 goto buf_map_failed;
2278 }
2279
498cd8e4
JA		 2280 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2281 sizeof(u64) * adapter->req_tx_queues +
2282 sizeof(u64) * adapter->req_rx_queues +
2283 sizeof(u64) * adapter->req_rx_queues +
2284 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
032c5e82
TF		 2285
2286 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2287 if (!login_rsp_buffer)
2288 goto buf_rsp_alloc_failed;
2289
2290 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2291 rsp_buffer_size, DMA_FROM_DEVICE);
2292 if (dma_mapping_error(dev, rsp_buffer_token)) {
2293 dev_err(dev, "Couldn't map login rsp buffer\n");
2294 goto buf_rsp_map_failed;
2295 }
661a2622 2296
032c5e82
TF		 2297 adapter->login_buf = login_buffer;
2298 adapter->login_buf_token = buffer_token;
2299 adapter->login_buf_sz = buffer_size;
2300 adapter->login_rsp_buf = login_rsp_buffer;
2301 adapter->login_rsp_buf_token = rsp_buffer_token;
2302 adapter->login_rsp_buf_sz = rsp_buffer_size;
2303
2304 login_buffer->len = cpu_to_be32(buffer_size);
2305 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2306 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2307 login_buffer->off_txcomp_subcrqs =
2308 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2309 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2310 login_buffer->off_rxcomp_subcrqs =
2311 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2312 sizeof(u64) * adapter->req_tx_queues);
2313 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2314 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2315
2316 tx_list_p = (__be64 *)((char *)login_buffer +
2317 sizeof(struct ibmvnic_login_buffer));
2318 rx_list_p = (__be64 *)((char *)login_buffer +
2319 sizeof(struct ibmvnic_login_buffer) +
2320 sizeof(u64) * adapter->req_tx_queues);
2321
2322 for (i = 0; i < adapter->req_tx_queues; i++) {
2323 if (adapter->tx_scrq[i]) {
2324 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2325 crq_num);
2326 }
2327 }
2328
2329 for (i = 0; i < adapter->req_rx_queues; i++) {
2330 if (adapter->rx_scrq[i]) {
2331 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2332 crq_num);
2333 }
2334 }
2335
2336 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2337 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2338 netdev_dbg(adapter->netdev, "%016lx\n",
2339 ((unsigned long int *)(adapter->login_buf))[i]);
2340 }
2341
2342 memset(&crq, 0, sizeof(crq));
2343 crq.login.first = IBMVNIC_CRQ_CMD;
2344 crq.login.cmd = LOGIN;
2345 crq.login.ioba = cpu_to_be32(buffer_token);
2346 crq.login.len = cpu_to_be32(buffer_size);
032c5e82
TF		 2347 ibmvnic_send_crq(adapter, &crq);
2348
2349 return;
2350
032c5e82
TF		 2351buf_rsp_map_failed:
2352 kfree(login_rsp_buffer);
2353buf_rsp_alloc_failed:
2354 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2355buf_map_failed:
2356 kfree(login_buffer);
2357buf_alloc_failed:
2358 return;
2359}
2360
2361static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2362 u32 len, u8 map_id)
2363{
2364 union ibmvnic_crq crq;
2365
2366 memset(&crq, 0, sizeof(crq));
2367 crq.request_map.first = IBMVNIC_CRQ_CMD;
2368 crq.request_map.cmd = REQUEST_MAP;
2369 crq.request_map.map_id = map_id;
2370 crq.request_map.ioba = cpu_to_be32(addr);
2371 crq.request_map.len = cpu_to_be32(len);
2372 ibmvnic_send_crq(adapter, &crq);
2373}
2374
2375static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2376{
2377 union ibmvnic_crq crq;
2378
2379 memset(&crq, 0, sizeof(crq));
2380 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2381 crq.request_unmap.cmd = REQUEST_UNMAP;
2382 crq.request_unmap.map_id = map_id;
2383 ibmvnic_send_crq(adapter, &crq);
2384}
2385
2386static void send_map_query(struct ibmvnic_adapter *adapter)
2387{
2388 union ibmvnic_crq crq;
2389
2390 memset(&crq, 0, sizeof(crq));
2391 crq.query_map.first = IBMVNIC_CRQ_CMD;
2392 crq.query_map.cmd = QUERY_MAP;
2393 ibmvnic_send_crq(adapter, &crq);
2394}
2395
2396/* Send a series of CRQs requesting various capabilities of the VNIC server */
2397static void send_cap_queries(struct ibmvnic_adapter *adapter)
2398{
2399 union ibmvnic_crq crq;
2400
901e040a 2401 atomic_set(&adapter->running_cap_crqs, 0);
032c5e82
TF		 2402 memset(&crq, 0, sizeof(crq));
2403 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2404 crq.query_capability.cmd = QUERY_CAPABILITY;
2405
2406 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
901e040a 2407 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2408 ibmvnic_send_crq(adapter, &crq);
2409
2410 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
901e040a 2411 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2412 ibmvnic_send_crq(adapter, &crq);
2413
2414 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
901e040a 2415 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2416 ibmvnic_send_crq(adapter, &crq);
2417
2418 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
901e040a 2419 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2420 ibmvnic_send_crq(adapter, &crq);
2421
2422 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
901e040a 2423 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2424 ibmvnic_send_crq(adapter, &crq);
2425
2426 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
901e040a 2427 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2428 ibmvnic_send_crq(adapter, &crq);
2429
2430 crq.query_capability.capability =
2431 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
901e040a 2432 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2433 ibmvnic_send_crq(adapter, &crq);
2434
2435 crq.query_capability.capability =
2436 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2437 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2438 ibmvnic_send_crq(adapter, &crq);
2439
2440 crq.query_capability.capability =
2441 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
901e040a 2442 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2443 ibmvnic_send_crq(adapter, &crq);
2444
2445 crq.query_capability.capability =
2446 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
901e040a 2447 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2448 ibmvnic_send_crq(adapter, &crq);
2449
2450 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
901e040a 2451 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2452 ibmvnic_send_crq(adapter, &crq);
2453
2454 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
901e040a 2455 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2456 ibmvnic_send_crq(adapter, &crq);
2457
2458 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
901e040a 2459 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2460 ibmvnic_send_crq(adapter, &crq);
2461
2462 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
901e040a 2463 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2464 ibmvnic_send_crq(adapter, &crq);
2465
2466 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
901e040a 2467 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2468 ibmvnic_send_crq(adapter, &crq);
2469
2470 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
901e040a 2471 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2472 ibmvnic_send_crq(adapter, &crq);
2473
6052d5e2
MFV		 2474 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2475 atomic_inc(&adapter->running_cap_crqs);
2476 ibmvnic_send_crq(adapter, &crq);
2477
032c5e82 2478 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
901e040a 2479 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2480 ibmvnic_send_crq(adapter, &crq);
2481
2482 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
901e040a 2483 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2484 ibmvnic_send_crq(adapter, &crq);
2485
2486 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
901e040a 2487 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2488 ibmvnic_send_crq(adapter, &crq);
2489
2490 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
901e040a 2491 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2492 ibmvnic_send_crq(adapter, &crq);
2493
2494 crq.query_capability.capability =
2495 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
901e040a 2496 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2497 ibmvnic_send_crq(adapter, &crq);
2498
2499 crq.query_capability.capability =
2500 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
901e040a 2501 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2502 ibmvnic_send_crq(adapter, &crq);
2503
2504 crq.query_capability.capability =
2505 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
901e040a 2506 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2507 ibmvnic_send_crq(adapter, &crq);
2508
2509 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
901e040a 2510 atomic_inc(&adapter->running_cap_crqs);
032c5e82
TF		 2511 ibmvnic_send_crq(adapter, &crq);
2512}
2513
2514static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2515{
2516 struct device *dev = &adapter->vdev->dev;
2517 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2518 union ibmvnic_crq crq;
2519 int i;
2520
2521 dma_unmap_single(dev, adapter->ip_offload_tok,
2522 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2523
2524 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2525 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2526 netdev_dbg(adapter->netdev, "%016lx\n",
2527 ((unsigned long int *)(buf))[i]);
2528
2529 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2530 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2531 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2532 buf->tcp_ipv4_chksum);
2533 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2534 buf->tcp_ipv6_chksum);
2535 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2536 buf->udp_ipv4_chksum);
2537 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2538 buf->udp_ipv6_chksum);
2539 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2540 buf->large_tx_ipv4);
2541 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2542 buf->large_tx_ipv6);
2543 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2544 buf->large_rx_ipv4);
2545 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2546 buf->large_rx_ipv6);
2547 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2548 buf->max_ipv4_header_size);
2549 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2550 buf->max_ipv6_header_size);
2551 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2552 buf->max_tcp_header_size);
2553 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2554 buf->max_udp_header_size);
2555 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2556 buf->max_large_tx_size);
2557 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2558 buf->max_large_rx_size);
2559 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2560 buf->ipv6_extension_header);
2561 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2562 buf->tcp_pseudosum_req);
2563 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2564 buf->num_ipv6_ext_headers);
2565 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2566 buf->off_ipv6_ext_headers);
2567
2568 adapter->ip_offload_ctrl_tok =
2569 dma_map_single(dev, &adapter->ip_offload_ctrl,
2570 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2571
2572 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2573 dev_err(dev, "Couldn't map ip offload control buffer\n");
2574 return;
2575 }
2576
2577 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2578 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2579 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2580 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2581 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2582
2583 /* large_tx/rx disabled for now, additional features needed */
2584 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2585 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2586 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2587 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2588
2589 adapter->netdev->features = NETIF_F_GSO;
2590
2591 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2592 adapter->netdev->features |= NETIF_F_IP_CSUM;
2593
2594 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2595 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2596
9be02cdf
TF		 2597 if ((adapter->netdev->features &
2598 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2599 adapter->netdev->features |= NETIF_F_RXCSUM;
2600
032c5e82
TF		 2601 memset(&crq, 0, sizeof(crq));
2602 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2603 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2604 crq.control_ip_offload.len =
2605 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2606 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2607 ibmvnic_send_crq(adapter, &crq);
2608}
2609
2610static void handle_error_info_rsp(union ibmvnic_crq *crq,
2611 struct ibmvnic_adapter *adapter)
2612{
2613 struct device *dev = &adapter->vdev->dev;
96183182 2614 struct ibmvnic_error_buff *error_buff, *tmp;
032c5e82
TF		 2615 unsigned long flags;
2616 bool found = false;
2617 int i;
2618
2619 if (!crq->request_error_rsp.rc.code) {
2620 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2621 crq->request_error_rsp.rc.code);
2622 return;
2623 }
2624
2625 spin_lock_irqsave(&adapter->error_list_lock, flags);
96183182 2626 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
032c5e82
TF		 2627 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2628 found = true;
2629 list_del(&error_buff->list);
2630 break;
2631 }
2632 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2633
2634 if (!found) {
2635 dev_err(dev, "Couldn't find error id %x\n",
75224c93 2636 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2637 return;
2638 }
2639
2640 dev_err(dev, "Detailed info for error id %x:",
75224c93 2641 be32_to_cpu(crq->request_error_rsp.error_id));
032c5e82
TF		 2642
2643 for (i = 0; i < error_buff->len; i++) {
2644 pr_cont("%02x", (int)error_buff->buff[i]);
2645 if (i % 8 == 7)
2646 pr_cont(" ");
2647 }
2648 pr_cont("\n");
2649
2650 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2651 DMA_FROM_DEVICE);
2652 kfree(error_buff->buff);
2653 kfree(error_buff);
2654}
2655
2f9de9ba
NF		 2656static void request_error_information(struct ibmvnic_adapter *adapter,
2657 union ibmvnic_crq *err_crq)
032c5e82 2658{
032c5e82 2659 struct device *dev = &adapter->vdev->dev;
2f9de9ba 2660 struct net_device *netdev = adapter->netdev;
032c5e82 2661 struct ibmvnic_error_buff *error_buff;
2f9de9ba
NF		 2662 unsigned long timeout = msecs_to_jiffies(30000);
2663 union ibmvnic_crq crq;
032c5e82 2664 unsigned long flags;
2f9de9ba 2665 int rc, detail_len;
032c5e82
TF		 2666
2667 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2668 if (!error_buff)
2669 return;
2670
2f9de9ba 2671 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
032c5e82
TF		 2672 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2673 if (!error_buff->buff) {
2674 kfree(error_buff);
2675 return;
2676 }
2677
2678 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2679 DMA_FROM_DEVICE);
2680 if (dma_mapping_error(dev, error_buff->dma)) {
2f9de9ba 2681 netdev_err(netdev, "Couldn't map error buffer\n");
032c5e82
TF		 2682 kfree(error_buff->buff);
2683 kfree(error_buff);
2684 return;
2685 }
2686
032c5e82 2687 error_buff->len = detail_len;
2f9de9ba 2688 error_buff->error_id = err_crq->error_indication.error_id;
032c5e82
TF		 2689
2690 spin_lock_irqsave(&adapter->error_list_lock, flags);
2691 list_add_tail(&error_buff->list, &adapter->errors);
2692 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2693
2f9de9ba
NF		 2694 memset(&crq, 0, sizeof(crq));
2695 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2696 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2697 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2698 crq.request_error_info.len = cpu_to_be32(detail_len);
2699 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2700
2701 rc = ibmvnic_send_crq(adapter, &crq);
2702 if (rc) {
2703 netdev_err(netdev, "failed to request error information\n");
2704 goto err_info_fail;
2705 }
2706
2707 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2708 netdev_err(netdev, "timeout waiting for error information\n");
2709 goto err_info_fail;
2710 }
2711
2712 return;
2713
2714err_info_fail:
2715 spin_lock_irqsave(&adapter->error_list_lock, flags);
2716 list_del(&error_buff->list);
2717 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2718
2719 kfree(error_buff->buff);
2720 kfree(error_buff);
2721}
2722
2723static void handle_error_indication(union ibmvnic_crq *crq,
2724 struct ibmvnic_adapter *adapter)
2725{
2726 struct device *dev = &adapter->vdev->dev;
2727
2728 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2729 crq->error_indication.flags
2730 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2731 be32_to_cpu(crq->error_indication.error_id),
2732 be16_to_cpu(crq->error_indication.error_cause));
2733
2734 if (be32_to_cpu(crq->error_indication.error_id))
2735 request_error_information(adapter, crq);
ed651a10
NF		 2736
2737 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2738 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 2739}
2740
2741static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2742 struct ibmvnic_adapter *adapter)
2743{
2744 struct net_device *netdev = adapter->netdev;
2745 struct device *dev = &adapter->vdev->dev;
2746 long rc;
2747
2748 rc = crq->change_mac_addr_rsp.rc.code;
2749 if (rc) {
2750 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2751 return;
2752 }
2753 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2754 ETH_ALEN);
2755}
2756
2757static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2758 struct ibmvnic_adapter *adapter)
2759{
2760 struct device *dev = &adapter->vdev->dev;
2761 u64 *req_value;
2762 char *name;
2763
901e040a 2764 atomic_dec(&adapter->running_cap_crqs);
032c5e82
TF		 2765 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2766 case REQ_TX_QUEUES:
2767 req_value = &adapter->req_tx_queues;
2768 name = "tx";
2769 break;
2770 case REQ_RX_QUEUES:
2771 req_value = &adapter->req_rx_queues;
2772 name = "rx";
2773 break;
2774 case REQ_RX_ADD_QUEUES:
2775 req_value = &adapter->req_rx_add_queues;
2776 name = "rx_add";
2777 break;
2778 case REQ_TX_ENTRIES_PER_SUBCRQ:
2779 req_value = &adapter->req_tx_entries_per_subcrq;
2780 name = "tx_entries_per_subcrq";
2781 break;
2782 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2783 req_value = &adapter->req_rx_add_entries_per_subcrq;
2784 name = "rx_add_entries_per_subcrq";
2785 break;
2786 case REQ_MTU:
2787 req_value = &adapter->req_mtu;
2788 name = "mtu";
2789 break;
2790 case PROMISC_REQUESTED:
2791 req_value = &adapter->promisc;
2792 name = "promisc";
2793 break;
2794 default:
2795 dev_err(dev, "Got invalid cap request rsp %d\n",
2796 crq->request_capability.capability);
2797 return;
2798 }
2799
2800 switch (crq->request_capability_rsp.rc.code) {
2801 case SUCCESS:
2802 break;
2803 case PARTIALSUCCESS:
2804 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2805 *req_value,
28f4d165 2806 (long int)be64_to_cpu(crq->request_capability_rsp.
032c5e82 2807 number), name);
b510888f 2808 release_sub_crqs(adapter);
28f4d165 2809 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
d346b9bc 2810 ibmvnic_send_req_caps(adapter, 1);
032c5e82
TF		 2811 return;
2812 default:
2813 dev_err(dev, "Error %d in request cap rsp\n",
2814 crq->request_capability_rsp.rc.code);
2815 return;
2816 }
2817
2818 /* Done receiving requested capabilities, query IP offload support */
901e040a 2819 if (atomic_read(&adapter->running_cap_crqs) == 0) {
032c5e82
TF		 2820 union ibmvnic_crq newcrq;
2821 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2822 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2823 &adapter->ip_offload_buf;
2824
249168ad 2825 adapter->wait_capability = false;
032c5e82
TF		 2826 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2827 buf_sz,
2828 DMA_FROM_DEVICE);
2829
2830 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2831 if (!firmware_has_feature(FW_FEATURE_CMO))
2832 dev_err(dev, "Couldn't map offload buffer\n");
2833 return;
2834 }
2835
2836 memset(&newcrq, 0, sizeof(newcrq));
2837 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2838 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2839 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2840 newcrq.query_ip_offload.ioba =
2841 cpu_to_be32(adapter->ip_offload_tok);
2842
2843 ibmvnic_send_crq(adapter, &newcrq);
2844 }
2845}
2846
2847static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2848 struct ibmvnic_adapter *adapter)
2849{
2850 struct device *dev = &adapter->vdev->dev;
2851 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2852 struct ibmvnic_login_buffer *login = adapter->login_buf;
032c5e82
TF		 2853 int i;
2854
2855 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2856 DMA_BIDIRECTIONAL);
2857 dma_unmap_single(dev, adapter->login_rsp_buf_token,
2858 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2859
498cd8e4
JA		 2860 /* If the number of queues requested can't be allocated by the
2861 * server, the login response will return with code 1. We will need
2862 * to resend the login buffer with fewer queues requested.
2863 */
2864 if (login_rsp_crq->generic.rc.code) {
2865 adapter->renegotiate = true;
2866 complete(&adapter->init_done);
2867 return 0;
2868 }
2869
032c5e82
TF		 2870 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2871 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2872 netdev_dbg(adapter->netdev, "%016lx\n",
2873 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2874 }
2875
2876 /* Sanity checks */
2877 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2878 (be32_to_cpu(login->num_rxcomp_subcrqs) *
2879 adapter->req_rx_add_queues !=
2880 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2881 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2882 ibmvnic_remove(adapter->vdev);
2883 return -EIO;
2884 }
2885 complete(&adapter->init_done);
2886
032c5e82
TF		 2887 return 0;
2888}
2889
2890static void handle_request_map_rsp(union ibmvnic_crq *crq,
2891 struct ibmvnic_adapter *adapter)
2892{
2893 struct device *dev = &adapter->vdev->dev;
2894 u8 map_id = crq->request_map_rsp.map_id;
2895 int tx_subcrqs;
2896 int rx_subcrqs;
2897 long rc;
2898 int i;
2899
2900 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2901 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2902
2903 rc = crq->request_map_rsp.rc.code;
2904 if (rc) {
2905 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2906 adapter->map_id--;
2907 /* need to find and zero tx/rx_pool map_id */
2908 for (i = 0; i < tx_subcrqs; i++) {
2909 if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2910 adapter->tx_pool[i].long_term_buff.map_id = 0;
2911 }
2912 for (i = 0; i < rx_subcrqs; i++) {
2913 if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2914 adapter->rx_pool[i].long_term_buff.map_id = 0;
2915 }
2916 }
2917 complete(&adapter->fw_done);
2918}
2919
2920static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2921 struct ibmvnic_adapter *adapter)
2922{
2923 struct device *dev = &adapter->vdev->dev;
2924 long rc;
2925
2926 rc = crq->request_unmap_rsp.rc.code;
2927 if (rc)
2928 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2929}
2930
2931static void handle_query_map_rsp(union ibmvnic_crq *crq,
2932 struct ibmvnic_adapter *adapter)
2933{
2934 struct net_device *netdev = adapter->netdev;
2935 struct device *dev = &adapter->vdev->dev;
2936 long rc;
2937
2938 rc = crq->query_map_rsp.rc.code;
2939 if (rc) {
2940 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2941 return;
2942 }
2943 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2944 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2945 crq->query_map_rsp.free_pages);
2946}
2947
2948static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2949 struct ibmvnic_adapter *adapter)
2950{
2951 struct net_device *netdev = adapter->netdev;
2952 struct device *dev = &adapter->vdev->dev;
2953 long rc;
2954
901e040a 2955 atomic_dec(&adapter->running_cap_crqs);
032c5e82 2956 netdev_dbg(netdev, "Outstanding queries: %d\n",
901e040a 2957 atomic_read(&adapter->running_cap_crqs));
032c5e82
TF		 2958 rc = crq->query_capability.rc.code;
2959 if (rc) {
2960 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2961 goto out;
2962 }
2963
2964 switch (be16_to_cpu(crq->query_capability.capability)) {
2965 case MIN_TX_QUEUES:
2966 adapter->min_tx_queues =
de89e854 2967 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2968 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2969 adapter->min_tx_queues);
2970 break;
2971 case MIN_RX_QUEUES:
2972 adapter->min_rx_queues =
de89e854 2973 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2974 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2975 adapter->min_rx_queues);
2976 break;
2977 case MIN_RX_ADD_QUEUES:
2978 adapter->min_rx_add_queues =
de89e854 2979 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2980 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2981 adapter->min_rx_add_queues);
2982 break;
2983 case MAX_TX_QUEUES:
2984 adapter->max_tx_queues =
de89e854 2985 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2986 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2987 adapter->max_tx_queues);
2988 break;
2989 case MAX_RX_QUEUES:
2990 adapter->max_rx_queues =
de89e854 2991 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2992 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2993 adapter->max_rx_queues);
2994 break;
2995 case MAX_RX_ADD_QUEUES:
2996 adapter->max_rx_add_queues =
de89e854 2997 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 2998 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2999 adapter->max_rx_add_queues);
3000 break;
3001 case MIN_TX_ENTRIES_PER_SUBCRQ:
3002 adapter->min_tx_entries_per_subcrq =
de89e854 3003 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3004 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3005 adapter->min_tx_entries_per_subcrq);
3006 break;
3007 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3008 adapter->min_rx_add_entries_per_subcrq =
de89e854 3009 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3010 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3011 adapter->min_rx_add_entries_per_subcrq);
3012 break;
3013 case MAX_TX_ENTRIES_PER_SUBCRQ:
3014 adapter->max_tx_entries_per_subcrq =
de89e854 3015 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3016 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3017 adapter->max_tx_entries_per_subcrq);
3018 break;
3019 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3020 adapter->max_rx_add_entries_per_subcrq =
de89e854 3021 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3022 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3023 adapter->max_rx_add_entries_per_subcrq);
3024 break;
3025 case TCP_IP_OFFLOAD:
3026 adapter->tcp_ip_offload =
de89e854 3027 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3028 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3029 adapter->tcp_ip_offload);
3030 break;
3031 case PROMISC_SUPPORTED:
3032 adapter->promisc_supported =
de89e854 3033 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3034 netdev_dbg(netdev, "promisc_supported = %lld\n",
3035 adapter->promisc_supported);
3036 break;
3037 case MIN_MTU:
de89e854 3038 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3039 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
032c5e82
TF		 3040 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3041 break;
3042 case MAX_MTU:
de89e854 3043 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
f39f0d1e 3044 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
032c5e82
TF		 3045 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3046 break;
3047 case MAX_MULTICAST_FILTERS:
3048 adapter->max_multicast_filters =
de89e854 3049 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3050 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3051 adapter->max_multicast_filters);
3052 break;
3053 case VLAN_HEADER_INSERTION:
3054 adapter->vlan_header_insertion =
de89e854 3055 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3056 if (adapter->vlan_header_insertion)
3057 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3058 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3059 adapter->vlan_header_insertion);
3060 break;
6052d5e2
MFV		 3061 case RX_VLAN_HEADER_INSERTION:
3062 adapter->rx_vlan_header_insertion =
3063 be64_to_cpu(crq->query_capability.number);
3064 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3065 adapter->rx_vlan_header_insertion);
3066 break;
032c5e82
TF		 3067 case MAX_TX_SG_ENTRIES:
3068 adapter->max_tx_sg_entries =
de89e854 3069 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3070 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3071 adapter->max_tx_sg_entries);
3072 break;
3073 case RX_SG_SUPPORTED:
3074 adapter->rx_sg_supported =
de89e854 3075 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3076 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3077 adapter->rx_sg_supported);
3078 break;
3079 case OPT_TX_COMP_SUB_QUEUES:
3080 adapter->opt_tx_comp_sub_queues =
de89e854 3081 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3082 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3083 adapter->opt_tx_comp_sub_queues);
3084 break;
3085 case OPT_RX_COMP_QUEUES:
3086 adapter->opt_rx_comp_queues =
de89e854 3087 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3088 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3089 adapter->opt_rx_comp_queues);
3090 break;
3091 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3092 adapter->opt_rx_bufadd_q_per_rx_comp_q =
de89e854 3093 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3094 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3095 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3096 break;
3097 case OPT_TX_ENTRIES_PER_SUBCRQ:
3098 adapter->opt_tx_entries_per_subcrq =
de89e854 3099 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3100 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3101 adapter->opt_tx_entries_per_subcrq);
3102 break;
3103 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3104 adapter->opt_rxba_entries_per_subcrq =
de89e854 3105 be64_to_cpu(crq->query_capability.number);
032c5e82
TF		 3106 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3107 adapter->opt_rxba_entries_per_subcrq);
3108 break;
3109 case TX_RX_DESC_REQ:
3110 adapter->tx_rx_desc_req = crq->query_capability.number;
3111 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3112 adapter->tx_rx_desc_req);
3113 break;
3114
3115 default:
3116 netdev_err(netdev, "Got invalid cap rsp %d\n",
3117 crq->query_capability.capability);
3118 }
3119
3120out:
249168ad
TF		 3121 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3122 adapter->wait_capability = false;
d346b9bc 3123 ibmvnic_send_req_caps(adapter, 0);
249168ad 3124 }
032c5e82
TF		 3125}
3126
032c5e82
TF		 3127static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3128 struct ibmvnic_adapter *adapter)
3129{
3130 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3131 struct net_device *netdev = adapter->netdev;
3132 struct device *dev = &adapter->vdev->dev;
993a82b0 3133 u64 *u64_crq = (u64 *)crq;
032c5e82
TF		 3134 long rc;
3135
3136 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
993a82b0
MFV		 3137 (unsigned long int)cpu_to_be64(u64_crq[0]),
3138 (unsigned long int)cpu_to_be64(u64_crq[1]));
032c5e82
TF		 3139 switch (gen_crq->first) {
3140 case IBMVNIC_CRQ_INIT_RSP:
3141 switch (gen_crq->cmd) {
3142 case IBMVNIC_CRQ_INIT:
3143 dev_info(dev, "Partner initialized\n");
032c5e82
TF		 3144 break;
3145 case IBMVNIC_CRQ_INIT_COMPLETE:
3146 dev_info(dev, "Partner initialization complete\n");
3147 send_version_xchg(adapter);
3148 break;
3149 default:
3150 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3151 }
3152 return;
3153 case IBMVNIC_CRQ_XPORT_EVENT:
ed651a10 3154 netif_carrier_off(netdev);
032c5e82 3155 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
ed651a10
NF		 3156 dev_info(dev, "Migrated, re-enabling adapter\n");
3157 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
dfad09a6
TF		 3158 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3159 dev_info(dev, "Backing device failover detected\n");
ed651a10 3160 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
032c5e82
TF		 3161 } else {
3162 /* The adapter lost the connection */
3163 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3164 gen_crq->cmd);
ed651a10 3165 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
032c5e82
TF		 3166 }
3167 return;
3168 case IBMVNIC_CRQ_CMD_RSP:
3169 break;
3170 default:
3171 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3172 gen_crq->first);
3173 return;
3174 }
3175
3176 switch (gen_crq->cmd) {
3177 case VERSION_EXCHANGE_RSP:
3178 rc = crq->version_exchange_rsp.rc.code;
3179 if (rc) {
3180 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3181 break;
3182 }
3183 dev_info(dev, "Partner protocol version is %d\n",
3184 crq->version_exchange_rsp.version);
3185 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3186 ibmvnic_version)
3187 ibmvnic_version =
3188 be16_to_cpu(crq->version_exchange_rsp.version);
3189 send_cap_queries(adapter);
3190 break;
3191 case QUERY_CAPABILITY_RSP:
3192 handle_query_cap_rsp(crq, adapter);
3193 break;
3194 case QUERY_MAP_RSP:
3195 handle_query_map_rsp(crq, adapter);
3196 break;
3197 case REQUEST_MAP_RSP:
3198 handle_request_map_rsp(crq, adapter);
3199 break;
3200 case REQUEST_UNMAP_RSP:
3201 handle_request_unmap_rsp(crq, adapter);
3202 break;
3203 case REQUEST_CAPABILITY_RSP:
3204 handle_request_cap_rsp(crq, adapter);
3205 break;
3206 case LOGIN_RSP:
3207 netdev_dbg(netdev, "Got Login Response\n");
3208 handle_login_rsp(crq, adapter);
3209 break;
3210 case LOGICAL_LINK_STATE_RSP:
53da09e9
NF		 3211 netdev_dbg(netdev,
3212 "Got Logical Link State Response, state: %d rc: %d\n",
3213 crq->logical_link_state_rsp.link_state,
3214 crq->logical_link_state_rsp.rc.code);
032c5e82
TF		 3215 adapter->logical_link_state =
3216 crq->logical_link_state_rsp.link_state;
53da09e9
NF		 3217 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3218 complete(&adapter->init_done);
032c5e82
TF		 3219 break;
3220 case LINK_STATE_INDICATION:
3221 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3222 adapter->phys_link_state =
3223 crq->link_state_indication.phys_link_state;
3224 adapter->logical_link_state =
3225 crq->link_state_indication.logical_link_state;
3226 break;
3227 case CHANGE_MAC_ADDR_RSP:
3228 netdev_dbg(netdev, "Got MAC address change Response\n");
3229 handle_change_mac_rsp(crq, adapter);
3230 break;
3231 case ERROR_INDICATION:
3232 netdev_dbg(netdev, "Got Error Indication\n");
3233 handle_error_indication(crq, adapter);
3234 break;
3235 case REQUEST_ERROR_RSP:
3236 netdev_dbg(netdev, "Got Error Detail Response\n");
3237 handle_error_info_rsp(crq, adapter);
3238 break;
3239 case REQUEST_STATISTICS_RSP:
3240 netdev_dbg(netdev, "Got Statistics Response\n");
3241 complete(&adapter->stats_done);
3242 break;
032c5e82
TF		 3243 case QUERY_IP_OFFLOAD_RSP:
3244 netdev_dbg(netdev, "Got Query IP offload Response\n");
3245 handle_query_ip_offload_rsp(adapter);
3246 break;
3247 case MULTICAST_CTRL_RSP:
3248 netdev_dbg(netdev, "Got multicast control Response\n");
3249 break;
3250 case CONTROL_IP_OFFLOAD_RSP:
3251 netdev_dbg(netdev, "Got Control IP offload Response\n");
3252 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3253 sizeof(adapter->ip_offload_ctrl),
3254 DMA_TO_DEVICE);
bd0b6723 3255 complete(&adapter->init_done);
032c5e82 3256 break;
032c5e82
TF		 3257 case COLLECT_FW_TRACE_RSP:
3258 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3259 complete(&adapter->fw_done);
3260 break;
3261 default:
3262 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3263 gen_crq->cmd);
3264 }
3265}
3266
3267static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3268{
3269 struct ibmvnic_adapter *adapter = instance;
6c267b3d 3270
6c267b3d 3271 tasklet_schedule(&adapter->tasklet);
6c267b3d
TF		 3272 return IRQ_HANDLED;
3273}
3274
3275static void ibmvnic_tasklet(void *data)
3276{
3277 struct ibmvnic_adapter *adapter = data;
032c5e82 3278 struct ibmvnic_crq_queue *queue = &adapter->crq;
032c5e82
TF		 3279 union ibmvnic_crq *crq;
3280 unsigned long flags;
3281 bool done = false;
3282
3283 spin_lock_irqsave(&queue->lock, flags);
032c5e82
TF		 3284 while (!done) {
3285 /* Pull all the valid messages off the CRQ */
3286 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3287 ibmvnic_handle_crq(crq, adapter);
3288 crq->generic.first = 0;
3289 }
ed7ecbf7
BK		 3290
3291 /* remain in tasklet until all
3292 * capabilities responses are received
3293 */
3294 if (!adapter->wait_capability)
3295 done = true;
032c5e82 3296 }
249168ad
TF		 3297 /* if capabilities CRQ's were sent in this tasklet, the following
3298 * tasklet must wait until all responses are received
3299 */
3300 if (atomic_read(&adapter->running_cap_crqs) != 0)
3301 adapter->wait_capability = true;
032c5e82 3302 spin_unlock_irqrestore(&queue->lock, flags);
032c5e82
TF		 3303}
3304
3305static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3306{
3307 struct vio_dev *vdev = adapter->vdev;
3308 int rc;
3309
3310 do {
3311 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3312 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3313
3314 if (rc)
3315 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3316
3317 return rc;
3318}
3319
3320static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3321{
3322 struct ibmvnic_crq_queue *crq = &adapter->crq;
3323 struct device *dev = &adapter->vdev->dev;
3324 struct vio_dev *vdev = adapter->vdev;
3325 int rc;
3326
3327 /* Close the CRQ */
3328 do {
3329 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3330 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3331
3332 /* Clean out the queue */
3333 memset(crq->msgs, 0, PAGE_SIZE);
3334 crq->cur = 0;
3335
3336 /* And re-open it again */
3337 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3338 crq->msg_token, PAGE_SIZE);
3339
3340 if (rc == H_CLOSED)
3341 /* Adapter is good, but other end is not ready */
3342 dev_warn(dev, "Partner adapter not ready\n");
3343 else if (rc != 0)
3344 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3345
3346 return rc;
3347}
3348
f992887c 3349static void release_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3350{
3351 struct ibmvnic_crq_queue *crq = &adapter->crq;
3352 struct vio_dev *vdev = adapter->vdev;
3353 long rc;
3354
f992887c
NF		 3355 if (!crq->msgs)
3356 return;
3357
032c5e82
TF		 3358 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3359 free_irq(vdev->irq, adapter);
6c267b3d 3360 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3361 do {
3362 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3363 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3364
3365 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3366 DMA_BIDIRECTIONAL);
3367 free_page((unsigned long)crq->msgs);
f992887c 3368 crq->msgs = NULL;
032c5e82
TF		 3369}
3370
f992887c 3371static int init_crq_queue(struct ibmvnic_adapter *adapter)
032c5e82
TF		 3372{
3373 struct ibmvnic_crq_queue *crq = &adapter->crq;
3374 struct device *dev = &adapter->vdev->dev;
3375 struct vio_dev *vdev = adapter->vdev;
3376 int rc, retrc = -ENOMEM;
3377
f992887c
NF		 3378 if (crq->msgs)
3379 return 0;
3380
032c5e82
TF		 3381 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3382 /* Should we allocate more than one page? */
3383
3384 if (!crq->msgs)
3385 return -ENOMEM;
3386
3387 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3388 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3389 DMA_BIDIRECTIONAL);
3390 if (dma_mapping_error(dev, crq->msg_token))
3391 goto map_failed;
3392
3393 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3394 crq->msg_token, PAGE_SIZE);
3395
3396 if (rc == H_RESOURCE)
3397 /* maybe kexecing and resource is busy. try a reset */
3398 rc = ibmvnic_reset_crq(adapter);
3399 retrc = rc;
3400
3401 if (rc == H_CLOSED) {
3402 dev_warn(dev, "Partner adapter not ready\n");
3403 } else if (rc) {
3404 dev_warn(dev, "Error %d opening adapter\n", rc);
3405 goto reg_crq_failed;
3406 }
3407
3408 retrc = 0;
3409
6c267b3d
TF		 3410 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3411 (unsigned long)adapter);
3412
032c5e82
TF		 3413 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3414 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3415 adapter);
3416 if (rc) {
3417 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3418 vdev->irq, rc);
3419 goto req_irq_failed;
3420 }
3421
3422 rc = vio_enable_interrupts(vdev);
3423 if (rc) {
3424 dev_err(dev, "Error %d enabling interrupts\n", rc);
3425 goto req_irq_failed;
3426 }
3427
3428 crq->cur = 0;
3429 spin_lock_init(&crq->lock);
3430
3431 return retrc;
3432
3433req_irq_failed:
6c267b3d 3434 tasklet_kill(&adapter->tasklet);
032c5e82
TF		 3435 do {
3436 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3437 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3438reg_crq_failed:
3439 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3440map_failed:
3441 free_page((unsigned long)crq->msgs);
f992887c 3442 crq->msgs = NULL;
032c5e82
TF		 3443 return retrc;
3444}
3445
f6ef6408 3446static int ibmvnic_init(struct ibmvnic_adapter *adapter)
032c5e82 3447{
f6ef6408 3448 struct device *dev = &adapter->vdev->dev;
ea22d51a 3449 unsigned long timeout = msecs_to_jiffies(30000);
f6ef6408
JA		 3450 int rc;
3451
f992887c 3452 rc = init_crq_queue(adapter);
f6ef6408
JA		 3453 if (rc) {
3454 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3455 return rc;
3456 }
3457
f6ef6408
JA		 3458 init_completion(&adapter->init_done);
3459 ibmvnic_send_crq_init(adapter);
3460 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3461 dev_err(dev, "Initialization sequence timed out\n");
f992887c 3462 release_crq_queue(adapter);
f6ef6408
JA		 3463 return -1;
3464 }
3465
1bb3c739
NF		 3466 rc = init_sub_crqs(adapter);
3467 if (rc) {
3468 dev_err(dev, "Initialization of sub crqs failed\n");
3469 release_crq_queue(adapter);
3470 }
3471
3472 return rc;
f6ef6408
JA		 3473}
3474
3475static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3476{
032c5e82
TF		 3477 struct ibmvnic_adapter *adapter;
3478 struct net_device *netdev;
3479 unsigned char *mac_addr_p;
032c5e82
TF		 3480 int rc;
3481
3482 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3483 dev->unit_address);
3484
3485 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3486 VETH_MAC_ADDR, NULL);
3487 if (!mac_addr_p) {
3488 dev_err(&dev->dev,
3489 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3490 __FILE__, __LINE__);
3491 return 0;
3492 }
3493
3494 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3495 IBMVNIC_MAX_TX_QUEUES);
3496 if (!netdev)
3497 return -ENOMEM;
3498
3499 adapter = netdev_priv(netdev);
90c8014c 3500 adapter->state = VNIC_PROBING;
032c5e82
TF		 3501 dev_set_drvdata(&dev->dev, netdev);
3502 adapter->vdev = dev;
3503 adapter->netdev = netdev;
3504
3505 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3506 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3507 netdev->irq = dev->irq;
3508 netdev->netdev_ops = &ibmvnic_netdev_ops;
3509 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3510 SET_NETDEV_DEV(netdev, &dev->dev);
3511
3512 spin_lock_init(&adapter->stats_lock);
3513
032c5e82 3514 INIT_LIST_HEAD(&adapter->errors);
032c5e82 3515 spin_lock_init(&adapter->error_list_lock);
032c5e82 3516
ed651a10
NF		 3517 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3518 INIT_LIST_HEAD(&adapter->rwi_list);
3519 mutex_init(&adapter->reset_lock);
3520 mutex_init(&adapter->rwi_lock);
3521 adapter->resetting = false;
3522
f6ef6408
JA		 3523 rc = ibmvnic_init(adapter);
3524 if (rc) {
3525 free_netdev(netdev);
3526 return rc;
032c5e82 3527 }
032c5e82 3528
f39f0d1e 3529 netdev->mtu = adapter->req_mtu - ETH_HLEN;
032c5e82
TF		 3530
3531 rc = register_netdev(netdev);
3532 if (rc) {
3533 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
f6ef6408
JA		 3534 free_netdev(netdev);
3535 return rc;
032c5e82
TF		 3536 }
3537 dev_info(&dev->dev, "ibmvnic registered\n");
3538
90c8014c 3539 adapter->state = VNIC_PROBED;
032c5e82 3540 return 0;
032c5e82
TF		 3541}
3542
3543static int ibmvnic_remove(struct vio_dev *dev)
3544{
3545 struct net_device *netdev = dev_get_drvdata(&dev->dev);
37489055 3546 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
032c5e82 3547
90c8014c 3548 adapter->state = VNIC_REMOVING;
032c5e82 3549 unregister_netdev(netdev);
ed651a10 3550 mutex_lock(&adapter->reset_lock);
37489055
NF		 3551
3552 release_resources(adapter);
3553 release_sub_crqs(adapter);
3554 release_crq_queue(adapter);
3555
90c8014c
NF		 3556 adapter->state = VNIC_REMOVED;
3557
ed651a10 3558 mutex_unlock(&adapter->reset_lock);
032c5e82
TF		 3559 free_netdev(netdev);
3560 dev_set_drvdata(&dev->dev, NULL);
3561
3562 return 0;
3563}
3564
3565static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3566{
3567 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3568 struct ibmvnic_adapter *adapter;
3569 struct iommu_table *tbl;
3570 unsigned long ret = 0;
3571 int i;
3572
3573 tbl = get_iommu_table_base(&vdev->dev);
3574
3575 /* netdev inits at probe time along with the structures we need below*/
3576 if (!netdev)
3577 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3578
3579 adapter = netdev_priv(netdev);
3580
3581 ret += PAGE_SIZE; /* the crq message queue */
032c5e82
TF		 3582 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3583
3584 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3585 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3586
3587 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3588 i++)
3589 ret += adapter->rx_pool[i].size *
3590 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3591
3592 return ret;
3593}
3594
3595static int ibmvnic_resume(struct device *dev)
3596{
3597 struct net_device *netdev = dev_get_drvdata(dev);
3598 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3599 int i;
3600
3601 /* kick the interrupt handlers just in case we lost an interrupt */
3602 for (i = 0; i < adapter->req_rx_queues; i++)
3603 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3604 adapter->rx_scrq[i]);
3605
3606 return 0;
3607}
3608
3609static struct vio_device_id ibmvnic_device_table[] = {
3610 {"network", "IBM,vnic"},
3611 {"", "" }
3612};
3613MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3614
3615static const struct dev_pm_ops ibmvnic_pm_ops = {
3616 .resume = ibmvnic_resume
3617};
3618
3619static struct vio_driver ibmvnic_driver = {
3620 .id_table = ibmvnic_device_table,
3621 .probe = ibmvnic_probe,
3622 .remove = ibmvnic_remove,
3623 .get_desired_dma = ibmvnic_get_desired_dma,
3624 .name = ibmvnic_driver_name,
3625 .pm = &ibmvnic_pm_ops,
3626};
3627
3628/* module functions */
3629static int __init ibmvnic_module_init(void)
3630{
3631 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3632 IBMVNIC_DRIVER_VERSION);
3633
3634 return vio_register_driver(&ibmvnic_driver);
3635}
3636
3637static void __exit ibmvnic_module_exit(void)
3638{
3639 vio_unregister_driver(&ibmvnic_driver);
3640}
3641
3642module_init(ibmvnic_module_init);
3643module_exit(ibmvnic_module_exit);
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