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1// SPDX-License-Identifier: GPL-2.0-or-later
2/**************************************************************************/
3/* */
4/* IBM System i and System p Virtual NIC Device Driver */
5/* Copyright (C) 2014 IBM Corp. */
6/* Santiago Leon (santi_leon@yahoo.com) */
7/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8/* John Allen (jallen@linux.vnet.ibm.com) */
9/* */
10/* */
11/* This module contains the implementation of a virtual ethernet device */
12/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13/* option of the RS/6000 Platform Architecture to interface with virtual */
14/* ethernet NICs that are presented to the partition by the hypervisor. */
15/* */
16/* Messages are passed between the VNIC driver and the VNIC server using */
17/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18/* issue and receive commands that initiate communication with the server */
19/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20/* are used by the driver to notify the server that a packet is */
21/* ready for transmission or that a buffer has been added to receive a */
22/* packet. Subsequently, sCRQs are used by the server to notify the */
23/* driver that a packet transmission has been completed or that a packet */
24/* has been received and placed in a waiting buffer. */
25/* */
26/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27/* which skbs are DMA mapped and immediately unmapped when the transmit */
28/* or receive has been completed, the VNIC driver is required to use */
29/* "long term mapping". This entails that large, continuous DMA mapped */
30/* buffers are allocated on driver initialization and these buffers are */
31/* then continuously reused to pass skbs to and from the VNIC server. */
32/* */
33/**************************************************************************/
34
35#include <linux/module.h>
36#include <linux/moduleparam.h>
37#include <linux/types.h>
38#include <linux/errno.h>
39#include <linux/completion.h>
40#include <linux/ioport.h>
41#include <linux/dma-mapping.h>
42#include <linux/kernel.h>
43#include <linux/netdevice.h>
44#include <linux/etherdevice.h>
45#include <linux/skbuff.h>
46#include <linux/init.h>
47#include <linux/delay.h>
48#include <linux/mm.h>
49#include <linux/ethtool.h>
50#include <linux/proc_fs.h>
51#include <linux/if_arp.h>
52#include <linux/in.h>
53#include <linux/ip.h>
54#include <linux/ipv6.h>
55#include <linux/irq.h>
56#include <linux/kthread.h>
57#include <linux/seq_file.h>
58#include <linux/interrupt.h>
59#include <net/net_namespace.h>
60#include <asm/hvcall.h>
61#include <linux/atomic.h>
62#include <asm/vio.h>
63#include <asm/iommu.h>
64#include <linux/uaccess.h>
65#include <asm/firmware.h>
66#include <linux/workqueue.h>
67#include <linux/if_vlan.h>
68#include <linux/utsname.h>
69
70#include "ibmvnic.h"
71
72static const char ibmvnic_driver_name[] = "ibmvnic";
73static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
74
75MODULE_AUTHOR("Santiago Leon");
76MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77MODULE_LICENSE("GPL");
78MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
79
80static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81static void release_sub_crqs(struct ibmvnic_adapter *, bool);
82static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
83static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
84static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
85static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
86static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
87static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
88static int enable_scrq_irq(struct ibmvnic_adapter *,
89 struct ibmvnic_sub_crq_queue *);
90static int disable_scrq_irq(struct ibmvnic_adapter *,
91 struct ibmvnic_sub_crq_queue *);
92static int pending_scrq(struct ibmvnic_adapter *,
93 struct ibmvnic_sub_crq_queue *);
94static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
95 struct ibmvnic_sub_crq_queue *);
96static int ibmvnic_poll(struct napi_struct *napi, int data);
97static void send_query_map(struct ibmvnic_adapter *adapter);
98static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8);
99static int send_request_unmap(struct ibmvnic_adapter *, u8);
100static int send_login(struct ibmvnic_adapter *adapter);
101static void send_query_cap(struct ibmvnic_adapter *adapter);
102static int init_sub_crqs(struct ibmvnic_adapter *);
103static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
104static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
105static void release_crq_queue(struct ibmvnic_adapter *);
106static int __ibmvnic_set_mac(struct net_device *, u8 *);
107static int init_crq_queue(struct ibmvnic_adapter *adapter);
108static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
109static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
110 struct ibmvnic_sub_crq_queue *tx_scrq);
111
112struct ibmvnic_stat {
113 char name[ETH_GSTRING_LEN];
114 int offset;
115};
116
117#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
118 offsetof(struct ibmvnic_statistics, stat))
119#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
120
121static const struct ibmvnic_stat ibmvnic_stats[] = {
122 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
123 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
124 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
125 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
126 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
127 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
128 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
129 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
130 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
131 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
132 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
133 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
134 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
135 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
136 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
137 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
138 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
139 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
140 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
141 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
142 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
143 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
144};
145
146static int send_crq_init_complete(struct ibmvnic_adapter *adapter)
147{
148 union ibmvnic_crq crq;
149
150 memset(&crq, 0, sizeof(crq));
151 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
152 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
153
154 return ibmvnic_send_crq(adapter, &crq);
155}
156
157static int send_version_xchg(struct ibmvnic_adapter *adapter)
158{
159 union ibmvnic_crq crq;
160
161 memset(&crq, 0, sizeof(crq));
162 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
163 crq.version_exchange.cmd = VERSION_EXCHANGE;
164 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
165
166 return ibmvnic_send_crq(adapter, &crq);
167}
168
169static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
170 unsigned long length, unsigned long *number,
171 unsigned long *irq)
172{
173 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
174 long rc;
175
176 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
177 *number = retbuf[0];
178 *irq = retbuf[1];
179
180 return rc;
181}
182
183/**
184 * ibmvnic_wait_for_completion - Check device state and wait for completion
185 * @adapter: private device data
186 * @comp_done: completion structure to wait for
187 * @timeout: time to wait in milliseconds
188 *
189 * Wait for a completion signal or until the timeout limit is reached
190 * while checking that the device is still active.
191 */
192static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
193 struct completion *comp_done,
194 unsigned long timeout)
195{
196 struct net_device *netdev;
197 unsigned long div_timeout;
198 u8 retry;
199
200 netdev = adapter->netdev;
201 retry = 5;
202 div_timeout = msecs_to_jiffies(timeout / retry);
203 while (true) {
204 if (!adapter->crq.active) {
205 netdev_err(netdev, "Device down!\n");
206 return -ENODEV;
207 }
208 if (!retry--)
209 break;
210 if (wait_for_completion_timeout(comp_done, div_timeout))
211 return 0;
212 }
213 netdev_err(netdev, "Operation timed out.\n");
214 return -ETIMEDOUT;
215}
216
217static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
218 struct ibmvnic_long_term_buff *ltb, int size)
219{
220 struct device *dev = &adapter->vdev->dev;
221 int rc;
222
223 ltb->size = size;
224 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
225 GFP_KERNEL);
226
227 if (!ltb->buff) {
228 dev_err(dev, "Couldn't alloc long term buffer\n");
229 return -ENOMEM;
230 }
231 ltb->map_id = adapter->map_id;
232 adapter->map_id++;
233
234 mutex_lock(&adapter->fw_lock);
235 adapter->fw_done_rc = 0;
236 reinit_completion(&adapter->fw_done);
237
238 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
239 if (rc) {
240 dev_err(dev, "send_request_map failed, rc = %d\n", rc);
241 goto out;
242 }
243
244 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
245 if (rc) {
246 dev_err(dev,
247 "Long term map request aborted or timed out,rc = %d\n",
248 rc);
249 goto out;
250 }
251
252 if (adapter->fw_done_rc) {
253 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
254 adapter->fw_done_rc);
255 rc = -1;
256 goto out;
257 }
258 rc = 0;
259out:
260 if (rc) {
261 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
262 ltb->buff = NULL;
263 }
264 mutex_unlock(&adapter->fw_lock);
265 return rc;
266}
267
268static void free_long_term_buff(struct ibmvnic_adapter *adapter,
269 struct ibmvnic_long_term_buff *ltb)
270{
271 struct device *dev = &adapter->vdev->dev;
272
273 if (!ltb->buff)
274 return;
275
276 /* VIOS automatically unmaps the long term buffer at remote
277 * end for the following resets:
278 * FAILOVER, MOBILITY, TIMEOUT.
279 */
280 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
281 adapter->reset_reason != VNIC_RESET_MOBILITY &&
282 adapter->reset_reason != VNIC_RESET_TIMEOUT)
283 send_request_unmap(adapter, ltb->map_id);
284 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
285 ltb->buff = NULL;
286 ltb->map_id = 0;
287}
288
289static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
290 struct ibmvnic_long_term_buff *ltb)
291{
292 struct device *dev = &adapter->vdev->dev;
293 int rc;
294
295 memset(ltb->buff, 0, ltb->size);
296
297 mutex_lock(&adapter->fw_lock);
298 adapter->fw_done_rc = 0;
299
300 reinit_completion(&adapter->fw_done);
301 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
302 if (rc) {
303 mutex_unlock(&adapter->fw_lock);
304 return rc;
305 }
306
307 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
308 if (rc) {
309 dev_info(dev,
310 "Reset failed, long term map request timed out or aborted\n");
311 mutex_unlock(&adapter->fw_lock);
312 return rc;
313 }
314
315 if (adapter->fw_done_rc) {
316 dev_info(dev,
317 "Reset failed, attempting to free and reallocate buffer\n");
318 free_long_term_buff(adapter, ltb);
319 mutex_unlock(&adapter->fw_lock);
320 return alloc_long_term_buff(adapter, ltb, ltb->size);
321 }
322 mutex_unlock(&adapter->fw_lock);
323 return 0;
324}
325
326static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
327{
328 int i;
329
330 for (i = 0; i < adapter->num_active_rx_pools; i++)
331 adapter->rx_pool[i].active = 0;
332}
333
334static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
335 struct ibmvnic_rx_pool *pool)
336{
337 int count = pool->size - atomic_read(&pool->available);
338 u64 handle = adapter->rx_scrq[pool->index]->handle;
339 struct device *dev = &adapter->vdev->dev;
340 struct ibmvnic_ind_xmit_queue *ind_bufp;
341 struct ibmvnic_sub_crq_queue *rx_scrq;
342 union sub_crq *sub_crq;
343 int buffers_added = 0;
344 unsigned long lpar_rc;
345 struct sk_buff *skb;
346 unsigned int offset;
347 dma_addr_t dma_addr;
348 unsigned char *dst;
349 int shift = 0;
350 int index;
351 int i;
352
353 if (!pool->active)
354 return;
355
356 rx_scrq = adapter->rx_scrq[pool->index];
357 ind_bufp = &rx_scrq->ind_buf;
358
359 /* netdev_skb_alloc() could have failed after we saved a few skbs
360 * in the indir_buf and we would not have sent them to VIOS yet.
361 * To account for them, start the loop at ind_bufp->index rather
362 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will
363 * be 0.
364 */
365 for (i = ind_bufp->index; i < count; ++i) {
366 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
367 if (!skb) {
368 dev_err(dev, "Couldn't replenish rx buff\n");
369 adapter->replenish_no_mem++;
370 break;
371 }
372
373 index = pool->free_map[pool->next_free];
374
375 if (pool->rx_buff[index].skb)
376 dev_err(dev, "Inconsistent free_map!\n");
377
378 /* Copy the skb to the long term mapped DMA buffer */
379 offset = index * pool->buff_size;
380 dst = pool->long_term_buff.buff + offset;
381 memset(dst, 0, pool->buff_size);
382 dma_addr = pool->long_term_buff.addr + offset;
383 pool->rx_buff[index].data = dst;
384
385 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
386 pool->rx_buff[index].dma = dma_addr;
387 pool->rx_buff[index].skb = skb;
388 pool->rx_buff[index].pool_index = pool->index;
389 pool->rx_buff[index].size = pool->buff_size;
390
391 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
392 memset(sub_crq, 0, sizeof(*sub_crq));
393 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
394 sub_crq->rx_add.correlator =
395 cpu_to_be64((u64)&pool->rx_buff[index]);
396 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
397 sub_crq->rx_add.map_id = pool->long_term_buff.map_id;
398
399 /* The length field of the sCRQ is defined to be 24 bits so the
400 * buffer size needs to be left shifted by a byte before it is
401 * converted to big endian to prevent the last byte from being
402 * truncated.
403 */
404#ifdef __LITTLE_ENDIAN__
405 shift = 8;
406#endif
407 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
408 pool->next_free = (pool->next_free + 1) % pool->size;
409 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
410 i == count - 1) {
411 lpar_rc =
412 send_subcrq_indirect(adapter, handle,
413 (u64)ind_bufp->indir_dma,
414 (u64)ind_bufp->index);
415 if (lpar_rc != H_SUCCESS)
416 goto failure;
417 buffers_added += ind_bufp->index;
418 adapter->replenish_add_buff_success += ind_bufp->index;
419 ind_bufp->index = 0;
420 }
421 }
422 atomic_add(buffers_added, &pool->available);
423 return;
424
425failure:
426 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
427 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
428 for (i = ind_bufp->index - 1; i >= 0; --i) {
429 struct ibmvnic_rx_buff *rx_buff;
430
431 pool->next_free = pool->next_free == 0 ?
432 pool->size - 1 : pool->next_free - 1;
433 sub_crq = &ind_bufp->indir_arr[i];
434 rx_buff = (struct ibmvnic_rx_buff *)
435 be64_to_cpu(sub_crq->rx_add.correlator);
436 index = (int)(rx_buff - pool->rx_buff);
437 pool->free_map[pool->next_free] = index;
438 dev_kfree_skb_any(pool->rx_buff[index].skb);
439 pool->rx_buff[index].skb = NULL;
440 }
441 adapter->replenish_add_buff_failure += ind_bufp->index;
442 atomic_add(buffers_added, &pool->available);
443 ind_bufp->index = 0;
444 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
445 /* Disable buffer pool replenishment and report carrier off if
446 * queue is closed or pending failover.
447 * Firmware guarantees that a signal will be sent to the
448 * driver, triggering a reset.
449 */
450 deactivate_rx_pools(adapter);
451 netif_carrier_off(adapter->netdev);
452 }
453}
454
455static void replenish_pools(struct ibmvnic_adapter *adapter)
456{
457 int i;
458
459 adapter->replenish_task_cycles++;
460 for (i = 0; i < adapter->num_active_rx_pools; i++) {
461 if (adapter->rx_pool[i].active)
462 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
463 }
464
465 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
466}
467
468static void release_stats_buffers(struct ibmvnic_adapter *adapter)
469{
470 kfree(adapter->tx_stats_buffers);
471 kfree(adapter->rx_stats_buffers);
472 adapter->tx_stats_buffers = NULL;
473 adapter->rx_stats_buffers = NULL;
474}
475
476static int init_stats_buffers(struct ibmvnic_adapter *adapter)
477{
478 adapter->tx_stats_buffers =
479 kcalloc(IBMVNIC_MAX_QUEUES,
480 sizeof(struct ibmvnic_tx_queue_stats),
481 GFP_KERNEL);
482 if (!adapter->tx_stats_buffers)
483 return -ENOMEM;
484
485 adapter->rx_stats_buffers =
486 kcalloc(IBMVNIC_MAX_QUEUES,
487 sizeof(struct ibmvnic_rx_queue_stats),
488 GFP_KERNEL);
489 if (!adapter->rx_stats_buffers)
490 return -ENOMEM;
491
492 return 0;
493}
494
495static void release_stats_token(struct ibmvnic_adapter *adapter)
496{
497 struct device *dev = &adapter->vdev->dev;
498
499 if (!adapter->stats_token)
500 return;
501
502 dma_unmap_single(dev, adapter->stats_token,
503 sizeof(struct ibmvnic_statistics),
504 DMA_FROM_DEVICE);
505 adapter->stats_token = 0;
506}
507
508static int init_stats_token(struct ibmvnic_adapter *adapter)
509{
510 struct device *dev = &adapter->vdev->dev;
511 dma_addr_t stok;
512
513 stok = dma_map_single(dev, &adapter->stats,
514 sizeof(struct ibmvnic_statistics),
515 DMA_FROM_DEVICE);
516 if (dma_mapping_error(dev, stok)) {
517 dev_err(dev, "Couldn't map stats buffer\n");
518 return -1;
519 }
520
521 adapter->stats_token = stok;
522 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
523 return 0;
524}
525
526static int reset_rx_pools(struct ibmvnic_adapter *adapter)
527{
528 struct ibmvnic_rx_pool *rx_pool;
529 u64 buff_size;
530 int rx_scrqs;
531 int i, j, rc;
532
533 if (!adapter->rx_pool)
534 return -1;
535
536 buff_size = adapter->cur_rx_buf_sz;
537 rx_scrqs = adapter->num_active_rx_pools;
538 for (i = 0; i < rx_scrqs; i++) {
539 rx_pool = &adapter->rx_pool[i];
540
541 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
542
543 if (rx_pool->buff_size != buff_size) {
544 free_long_term_buff(adapter, &rx_pool->long_term_buff);
545 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
546 rc = alloc_long_term_buff(adapter,
547 &rx_pool->long_term_buff,
548 rx_pool->size *
549 rx_pool->buff_size);
550 } else {
551 rc = reset_long_term_buff(adapter,
552 &rx_pool->long_term_buff);
553 }
554
555 if (rc)
556 return rc;
557
558 for (j = 0; j < rx_pool->size; j++)
559 rx_pool->free_map[j] = j;
560
561 memset(rx_pool->rx_buff, 0,
562 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
563
564 atomic_set(&rx_pool->available, 0);
565 rx_pool->next_alloc = 0;
566 rx_pool->next_free = 0;
567 rx_pool->active = 1;
568 }
569
570 return 0;
571}
572
573static void release_rx_pools(struct ibmvnic_adapter *adapter)
574{
575 struct ibmvnic_rx_pool *rx_pool;
576 int i, j;
577
578 if (!adapter->rx_pool)
579 return;
580
581 for (i = 0; i < adapter->num_active_rx_pools; i++) {
582 rx_pool = &adapter->rx_pool[i];
583
584 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
585
586 kfree(rx_pool->free_map);
587 free_long_term_buff(adapter, &rx_pool->long_term_buff);
588
589 if (!rx_pool->rx_buff)
590 continue;
591
592 for (j = 0; j < rx_pool->size; j++) {
593 if (rx_pool->rx_buff[j].skb) {
594 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
595 rx_pool->rx_buff[j].skb = NULL;
596 }
597 }
598
599 kfree(rx_pool->rx_buff);
600 }
601
602 kfree(adapter->rx_pool);
603 adapter->rx_pool = NULL;
604 adapter->num_active_rx_pools = 0;
605}
606
607static int init_rx_pools(struct net_device *netdev)
608{
609 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
610 struct device *dev = &adapter->vdev->dev;
611 struct ibmvnic_rx_pool *rx_pool;
612 int rxadd_subcrqs;
613 u64 buff_size;
614 int i, j;
615
616 rxadd_subcrqs = adapter->num_active_rx_scrqs;
617 buff_size = adapter->cur_rx_buf_sz;
618
619 adapter->rx_pool = kcalloc(rxadd_subcrqs,
620 sizeof(struct ibmvnic_rx_pool),
621 GFP_KERNEL);
622 if (!adapter->rx_pool) {
623 dev_err(dev, "Failed to allocate rx pools\n");
624 return -1;
625 }
626
627 adapter->num_active_rx_pools = rxadd_subcrqs;
628
629 for (i = 0; i < rxadd_subcrqs; i++) {
630 rx_pool = &adapter->rx_pool[i];
631
632 netdev_dbg(adapter->netdev,
633 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
634 i, adapter->req_rx_add_entries_per_subcrq,
635 buff_size);
636
637 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
638 rx_pool->index = i;
639 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
640 rx_pool->active = 1;
641
642 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
643 GFP_KERNEL);
644 if (!rx_pool->free_map) {
645 release_rx_pools(adapter);
646 return -1;
647 }
648
649 rx_pool->rx_buff = kcalloc(rx_pool->size,
650 sizeof(struct ibmvnic_rx_buff),
651 GFP_KERNEL);
652 if (!rx_pool->rx_buff) {
653 dev_err(dev, "Couldn't alloc rx buffers\n");
654 release_rx_pools(adapter);
655 return -1;
656 }
657
658 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
659 rx_pool->size * rx_pool->buff_size)) {
660 release_rx_pools(adapter);
661 return -1;
662 }
663
664 for (j = 0; j < rx_pool->size; ++j)
665 rx_pool->free_map[j] = j;
666
667 atomic_set(&rx_pool->available, 0);
668 rx_pool->next_alloc = 0;
669 rx_pool->next_free = 0;
670 }
671
672 return 0;
673}
674
675static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
676 struct ibmvnic_tx_pool *tx_pool)
677{
678 int rc, i;
679
680 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
681 if (rc)
682 return rc;
683
684 memset(tx_pool->tx_buff, 0,
685 tx_pool->num_buffers *
686 sizeof(struct ibmvnic_tx_buff));
687
688 for (i = 0; i < tx_pool->num_buffers; i++)
689 tx_pool->free_map[i] = i;
690
691 tx_pool->consumer_index = 0;
692 tx_pool->producer_index = 0;
693
694 return 0;
695}
696
697static int reset_tx_pools(struct ibmvnic_adapter *adapter)
698{
699 int tx_scrqs;
700 int i, rc;
701
702 if (!adapter->tx_pool)
703 return -1;
704
705 tx_scrqs = adapter->num_active_tx_pools;
706 for (i = 0; i < tx_scrqs; i++) {
707 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
708 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
709 if (rc)
710 return rc;
711 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
712 if (rc)
713 return rc;
714 }
715
716 return 0;
717}
718
719static void release_vpd_data(struct ibmvnic_adapter *adapter)
720{
721 if (!adapter->vpd)
722 return;
723
724 kfree(adapter->vpd->buff);
725 kfree(adapter->vpd);
726
727 adapter->vpd = NULL;
728}
729
730static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
731 struct ibmvnic_tx_pool *tx_pool)
732{
733 kfree(tx_pool->tx_buff);
734 kfree(tx_pool->free_map);
735 free_long_term_buff(adapter, &tx_pool->long_term_buff);
736}
737
738static void release_tx_pools(struct ibmvnic_adapter *adapter)
739{
740 int i;
741
742 if (!adapter->tx_pool)
743 return;
744
745 for (i = 0; i < adapter->num_active_tx_pools; i++) {
746 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
747 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
748 }
749
750 kfree(adapter->tx_pool);
751 adapter->tx_pool = NULL;
752 kfree(adapter->tso_pool);
753 adapter->tso_pool = NULL;
754 adapter->num_active_tx_pools = 0;
755}
756
757static int init_one_tx_pool(struct net_device *netdev,
758 struct ibmvnic_tx_pool *tx_pool,
759 int num_entries, int buf_size)
760{
761 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
762 int i;
763
764 tx_pool->tx_buff = kcalloc(num_entries,
765 sizeof(struct ibmvnic_tx_buff),
766 GFP_KERNEL);
767 if (!tx_pool->tx_buff)
768 return -1;
769
770 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
771 num_entries * buf_size))
772 return -1;
773
774 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
775 if (!tx_pool->free_map)
776 return -1;
777
778 for (i = 0; i < num_entries; i++)
779 tx_pool->free_map[i] = i;
780
781 tx_pool->consumer_index = 0;
782 tx_pool->producer_index = 0;
783 tx_pool->num_buffers = num_entries;
784 tx_pool->buf_size = buf_size;
785
786 return 0;
787}
788
789static int init_tx_pools(struct net_device *netdev)
790{
791 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
792 int tx_subcrqs;
793 u64 buff_size;
794 int i, rc;
795
796 tx_subcrqs = adapter->num_active_tx_scrqs;
797 adapter->tx_pool = kcalloc(tx_subcrqs,
798 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
799 if (!adapter->tx_pool)
800 return -1;
801
802 adapter->tso_pool = kcalloc(tx_subcrqs,
803 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
804 if (!adapter->tso_pool) {
805 kfree(adapter->tx_pool);
806 adapter->tx_pool = NULL;
807 return -1;
808 }
809
810 adapter->num_active_tx_pools = tx_subcrqs;
811
812 for (i = 0; i < tx_subcrqs; i++) {
813 buff_size = adapter->req_mtu + VLAN_HLEN;
814 buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
815 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
816 adapter->req_tx_entries_per_subcrq,
817 buff_size);
818 if (rc) {
819 release_tx_pools(adapter);
820 return rc;
821 }
822
823 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
824 IBMVNIC_TSO_BUFS,
825 IBMVNIC_TSO_BUF_SZ);
826 if (rc) {
827 release_tx_pools(adapter);
828 return rc;
829 }
830 }
831
832 return 0;
833}
834
835static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
836{
837 int i;
838
839 if (adapter->napi_enabled)
840 return;
841
842 for (i = 0; i < adapter->req_rx_queues; i++)
843 napi_enable(&adapter->napi[i]);
844
845 adapter->napi_enabled = true;
846}
847
848static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
849{
850 int i;
851
852 if (!adapter->napi_enabled)
853 return;
854
855 for (i = 0; i < adapter->req_rx_queues; i++) {
856 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
857 napi_disable(&adapter->napi[i]);
858 }
859
860 adapter->napi_enabled = false;
861}
862
863static int init_napi(struct ibmvnic_adapter *adapter)
864{
865 int i;
866
867 adapter->napi = kcalloc(adapter->req_rx_queues,
868 sizeof(struct napi_struct), GFP_KERNEL);
869 if (!adapter->napi)
870 return -ENOMEM;
871
872 for (i = 0; i < adapter->req_rx_queues; i++) {
873 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
874 netif_napi_add(adapter->netdev, &adapter->napi[i],
875 ibmvnic_poll, NAPI_POLL_WEIGHT);
876 }
877
878 adapter->num_active_rx_napi = adapter->req_rx_queues;
879 return 0;
880}
881
882static void release_napi(struct ibmvnic_adapter *adapter)
883{
884 int i;
885
886 if (!adapter->napi)
887 return;
888
889 for (i = 0; i < adapter->num_active_rx_napi; i++) {
890 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
891 netif_napi_del(&adapter->napi[i]);
892 }
893
894 kfree(adapter->napi);
895 adapter->napi = NULL;
896 adapter->num_active_rx_napi = 0;
897 adapter->napi_enabled = false;
898}
899
900static const char *adapter_state_to_string(enum vnic_state state)
901{
902 switch (state) {
903 case VNIC_PROBING:
904 return "PROBING";
905 case VNIC_PROBED:
906 return "PROBED";
907 case VNIC_OPENING:
908 return "OPENING";
909 case VNIC_OPEN:
910 return "OPEN";
911 case VNIC_CLOSING:
912 return "CLOSING";
913 case VNIC_CLOSED:
914 return "CLOSED";
915 case VNIC_REMOVING:
916 return "REMOVING";
917 case VNIC_REMOVED:
918 return "REMOVED";
919 case VNIC_DOWN:
920 return "DOWN";
921 }
922 return "UNKNOWN";
923}
924
925static int ibmvnic_login(struct net_device *netdev)
926{
927 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
928 unsigned long timeout = msecs_to_jiffies(20000);
929 int retry_count = 0;
930 int retries = 10;
931 bool retry;
932 int rc;
933
934 do {
935 retry = false;
936 if (retry_count > retries) {
937 netdev_warn(netdev, "Login attempts exceeded\n");
938 return -1;
939 }
940
941 adapter->init_done_rc = 0;
942 reinit_completion(&adapter->init_done);
943 rc = send_login(adapter);
944 if (rc)
945 return rc;
946
947 if (!wait_for_completion_timeout(&adapter->init_done,
948 timeout)) {
949 netdev_warn(netdev, "Login timed out, retrying...\n");
950 retry = true;
951 adapter->init_done_rc = 0;
952 retry_count++;
953 continue;
954 }
955
956 if (adapter->init_done_rc == ABORTED) {
957 netdev_warn(netdev, "Login aborted, retrying...\n");
958 retry = true;
959 adapter->init_done_rc = 0;
960 retry_count++;
961 /* FW or device may be busy, so
962 * wait a bit before retrying login
963 */
964 msleep(500);
965 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
966 retry_count++;
967 release_sub_crqs(adapter, 1);
968
969 retry = true;
970 netdev_dbg(netdev,
971 "Received partial success, retrying...\n");
972 adapter->init_done_rc = 0;
973 reinit_completion(&adapter->init_done);
974 send_query_cap(adapter);
975 if (!wait_for_completion_timeout(&adapter->init_done,
976 timeout)) {
977 netdev_warn(netdev,
978 "Capabilities query timed out\n");
979 return -1;
980 }
981
982 rc = init_sub_crqs(adapter);
983 if (rc) {
984 netdev_warn(netdev,
985 "SCRQ initialization failed\n");
986 return -1;
987 }
988
989 rc = init_sub_crq_irqs(adapter);
990 if (rc) {
991 netdev_warn(netdev,
992 "SCRQ irq initialization failed\n");
993 return -1;
994 }
995 } else if (adapter->init_done_rc) {
996 netdev_warn(netdev, "Adapter login failed\n");
997 return -1;
998 }
999 } while (retry);
1000
1001 __ibmvnic_set_mac(netdev, adapter->mac_addr);
1002
1003 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state));
1004 return 0;
1005}
1006
1007static void release_login_buffer(struct ibmvnic_adapter *adapter)
1008{
1009 kfree(adapter->login_buf);
1010 adapter->login_buf = NULL;
1011}
1012
1013static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
1014{
1015 kfree(adapter->login_rsp_buf);
1016 adapter->login_rsp_buf = NULL;
1017}
1018
1019static void release_resources(struct ibmvnic_adapter *adapter)
1020{
1021 release_vpd_data(adapter);
1022
1023 release_tx_pools(adapter);
1024 release_rx_pools(adapter);
1025
1026 release_napi(adapter);
1027 release_login_buffer(adapter);
1028 release_login_rsp_buffer(adapter);
1029}
1030
1031static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
1032{
1033 struct net_device *netdev = adapter->netdev;
1034 unsigned long timeout = msecs_to_jiffies(20000);
1035 union ibmvnic_crq crq;
1036 bool resend;
1037 int rc;
1038
1039 netdev_dbg(netdev, "setting link state %d\n", link_state);
1040
1041 memset(&crq, 0, sizeof(crq));
1042 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
1043 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
1044 crq.logical_link_state.link_state = link_state;
1045
1046 do {
1047 resend = false;
1048
1049 reinit_completion(&adapter->init_done);
1050 rc = ibmvnic_send_crq(adapter, &crq);
1051 if (rc) {
1052 netdev_err(netdev, "Failed to set link state\n");
1053 return rc;
1054 }
1055
1056 if (!wait_for_completion_timeout(&adapter->init_done,
1057 timeout)) {
1058 netdev_err(netdev, "timeout setting link state\n");
1059 return -1;
1060 }
1061
1062 if (adapter->init_done_rc == PARTIALSUCCESS) {
1063 /* Partuial success, delay and re-send */
1064 mdelay(1000);
1065 resend = true;
1066 } else if (adapter->init_done_rc) {
1067 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
1068 adapter->init_done_rc);
1069 return adapter->init_done_rc;
1070 }
1071 } while (resend);
1072
1073 return 0;
1074}
1075
1076static int set_real_num_queues(struct net_device *netdev)
1077{
1078 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1079 int rc;
1080
1081 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1082 adapter->req_tx_queues, adapter->req_rx_queues);
1083
1084 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1085 if (rc) {
1086 netdev_err(netdev, "failed to set the number of tx queues\n");
1087 return rc;
1088 }
1089
1090 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1091 if (rc)
1092 netdev_err(netdev, "failed to set the number of rx queues\n");
1093
1094 return rc;
1095}
1096
1097static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1098{
1099 struct device *dev = &adapter->vdev->dev;
1100 union ibmvnic_crq crq;
1101 int len = 0;
1102 int rc;
1103
1104 if (adapter->vpd->buff)
1105 len = adapter->vpd->len;
1106
1107 mutex_lock(&adapter->fw_lock);
1108 adapter->fw_done_rc = 0;
1109 reinit_completion(&adapter->fw_done);
1110
1111 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1112 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1113 rc = ibmvnic_send_crq(adapter, &crq);
1114 if (rc) {
1115 mutex_unlock(&adapter->fw_lock);
1116 return rc;
1117 }
1118
1119 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1120 if (rc) {
1121 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1122 mutex_unlock(&adapter->fw_lock);
1123 return rc;
1124 }
1125 mutex_unlock(&adapter->fw_lock);
1126
1127 if (!adapter->vpd->len)
1128 return -ENODATA;
1129
1130 if (!adapter->vpd->buff)
1131 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1132 else if (adapter->vpd->len != len)
1133 adapter->vpd->buff =
1134 krealloc(adapter->vpd->buff,
1135 adapter->vpd->len, GFP_KERNEL);
1136
1137 if (!adapter->vpd->buff) {
1138 dev_err(dev, "Could allocate VPD buffer\n");
1139 return -ENOMEM;
1140 }
1141
1142 adapter->vpd->dma_addr =
1143 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1144 DMA_FROM_DEVICE);
1145 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1146 dev_err(dev, "Could not map VPD buffer\n");
1147 kfree(adapter->vpd->buff);
1148 adapter->vpd->buff = NULL;
1149 return -ENOMEM;
1150 }
1151
1152 mutex_lock(&adapter->fw_lock);
1153 adapter->fw_done_rc = 0;
1154 reinit_completion(&adapter->fw_done);
1155
1156 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1157 crq.get_vpd.cmd = GET_VPD;
1158 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1159 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1160 rc = ibmvnic_send_crq(adapter, &crq);
1161 if (rc) {
1162 kfree(adapter->vpd->buff);
1163 adapter->vpd->buff = NULL;
1164 mutex_unlock(&adapter->fw_lock);
1165 return rc;
1166 }
1167
1168 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1169 if (rc) {
1170 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1171 kfree(adapter->vpd->buff);
1172 adapter->vpd->buff = NULL;
1173 mutex_unlock(&adapter->fw_lock);
1174 return rc;
1175 }
1176
1177 mutex_unlock(&adapter->fw_lock);
1178 return 0;
1179}
1180
1181static int init_resources(struct ibmvnic_adapter *adapter)
1182{
1183 struct net_device *netdev = adapter->netdev;
1184 int rc;
1185
1186 rc = set_real_num_queues(netdev);
1187 if (rc)
1188 return rc;
1189
1190 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1191 if (!adapter->vpd)
1192 return -ENOMEM;
1193
1194 /* Vital Product Data (VPD) */
1195 rc = ibmvnic_get_vpd(adapter);
1196 if (rc) {
1197 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1198 return rc;
1199 }
1200
1201 adapter->map_id = 1;
1202
1203 rc = init_napi(adapter);
1204 if (rc)
1205 return rc;
1206
1207 send_query_map(adapter);
1208
1209 rc = init_rx_pools(netdev);
1210 if (rc)
1211 return rc;
1212
1213 rc = init_tx_pools(netdev);
1214 return rc;
1215}
1216
1217static int __ibmvnic_open(struct net_device *netdev)
1218{
1219 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1220 enum vnic_state prev_state = adapter->state;
1221 int i, rc;
1222
1223 adapter->state = VNIC_OPENING;
1224 replenish_pools(adapter);
1225 ibmvnic_napi_enable(adapter);
1226
1227 /* We're ready to receive frames, enable the sub-crq interrupts and
1228 * set the logical link state to up
1229 */
1230 for (i = 0; i < adapter->req_rx_queues; i++) {
1231 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1232 if (prev_state == VNIC_CLOSED)
1233 enable_irq(adapter->rx_scrq[i]->irq);
1234 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1235 }
1236
1237 for (i = 0; i < adapter->req_tx_queues; i++) {
1238 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1239 if (prev_state == VNIC_CLOSED)
1240 enable_irq(adapter->tx_scrq[i]->irq);
1241 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1242 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
1243 }
1244
1245 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1246 if (rc) {
1247 ibmvnic_napi_disable(adapter);
1248 release_resources(adapter);
1249 return rc;
1250 }
1251
1252 netif_tx_start_all_queues(netdev);
1253
1254 if (prev_state == VNIC_CLOSED) {
1255 for (i = 0; i < adapter->req_rx_queues; i++)
1256 napi_schedule(&adapter->napi[i]);
1257 }
1258
1259 adapter->state = VNIC_OPEN;
1260 return rc;
1261}
1262
1263static int ibmvnic_open(struct net_device *netdev)
1264{
1265 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1266 int rc;
1267
1268 ASSERT_RTNL();
1269
1270 /* If device failover is pending or we are about to reset, just set
1271 * device state and return. Device operation will be handled by reset
1272 * routine.
1273 *
1274 * It should be safe to overwrite the adapter->state here. Since
1275 * we hold the rtnl, either the reset has not actually started or
1276 * the rtnl got dropped during the set_link_state() in do_reset().
1277 * In the former case, no one else is changing the state (again we
1278 * have the rtnl) and in the latter case, do_reset() will detect and
1279 * honor our setting below.
1280 */
1281 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) {
1282 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n",
1283 adapter_state_to_string(adapter->state),
1284 adapter->failover_pending);
1285 adapter->state = VNIC_OPEN;
1286 rc = 0;
1287 goto out;
1288 }
1289
1290 if (adapter->state != VNIC_CLOSED) {
1291 rc = ibmvnic_login(netdev);
1292 if (rc)
1293 goto out;
1294
1295 rc = init_resources(adapter);
1296 if (rc) {
1297 netdev_err(netdev, "failed to initialize resources\n");
1298 release_resources(adapter);
1299 goto out;
1300 }
1301 }
1302
1303 rc = __ibmvnic_open(netdev);
1304
1305out:
1306 /* If open failed and there is a pending failover or in-progress reset,
1307 * set device state and return. Device operation will be handled by
1308 * reset routine. See also comments above regarding rtnl.
1309 */
1310 if (rc &&
1311 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) {
1312 adapter->state = VNIC_OPEN;
1313 rc = 0;
1314 }
1315 return rc;
1316}
1317
1318static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1319{
1320 struct ibmvnic_rx_pool *rx_pool;
1321 struct ibmvnic_rx_buff *rx_buff;
1322 u64 rx_entries;
1323 int rx_scrqs;
1324 int i, j;
1325
1326 if (!adapter->rx_pool)
1327 return;
1328
1329 rx_scrqs = adapter->num_active_rx_pools;
1330 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1331
1332 /* Free any remaining skbs in the rx buffer pools */
1333 for (i = 0; i < rx_scrqs; i++) {
1334 rx_pool = &adapter->rx_pool[i];
1335 if (!rx_pool || !rx_pool->rx_buff)
1336 continue;
1337
1338 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1339 for (j = 0; j < rx_entries; j++) {
1340 rx_buff = &rx_pool->rx_buff[j];
1341 if (rx_buff && rx_buff->skb) {
1342 dev_kfree_skb_any(rx_buff->skb);
1343 rx_buff->skb = NULL;
1344 }
1345 }
1346 }
1347}
1348
1349static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1350 struct ibmvnic_tx_pool *tx_pool)
1351{
1352 struct ibmvnic_tx_buff *tx_buff;
1353 u64 tx_entries;
1354 int i;
1355
1356 if (!tx_pool || !tx_pool->tx_buff)
1357 return;
1358
1359 tx_entries = tx_pool->num_buffers;
1360
1361 for (i = 0; i < tx_entries; i++) {
1362 tx_buff = &tx_pool->tx_buff[i];
1363 if (tx_buff && tx_buff->skb) {
1364 dev_kfree_skb_any(tx_buff->skb);
1365 tx_buff->skb = NULL;
1366 }
1367 }
1368}
1369
1370static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1371{
1372 int tx_scrqs;
1373 int i;
1374
1375 if (!adapter->tx_pool || !adapter->tso_pool)
1376 return;
1377
1378 tx_scrqs = adapter->num_active_tx_pools;
1379
1380 /* Free any remaining skbs in the tx buffer pools */
1381 for (i = 0; i < tx_scrqs; i++) {
1382 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1383 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1384 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1385 }
1386}
1387
1388static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1389{
1390 struct net_device *netdev = adapter->netdev;
1391 int i;
1392
1393 if (adapter->tx_scrq) {
1394 for (i = 0; i < adapter->req_tx_queues; i++)
1395 if (adapter->tx_scrq[i]->irq) {
1396 netdev_dbg(netdev,
1397 "Disabling tx_scrq[%d] irq\n", i);
1398 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1399 disable_irq(adapter->tx_scrq[i]->irq);
1400 }
1401 }
1402
1403 if (adapter->rx_scrq) {
1404 for (i = 0; i < adapter->req_rx_queues; i++) {
1405 if (adapter->rx_scrq[i]->irq) {
1406 netdev_dbg(netdev,
1407 "Disabling rx_scrq[%d] irq\n", i);
1408 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1409 disable_irq(adapter->rx_scrq[i]->irq);
1410 }
1411 }
1412 }
1413}
1414
1415static void ibmvnic_cleanup(struct net_device *netdev)
1416{
1417 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1418
1419 /* ensure that transmissions are stopped if called by do_reset */
1420 if (test_bit(0, &adapter->resetting))
1421 netif_tx_disable(netdev);
1422 else
1423 netif_tx_stop_all_queues(netdev);
1424
1425 ibmvnic_napi_disable(adapter);
1426 ibmvnic_disable_irqs(adapter);
1427
1428 clean_rx_pools(adapter);
1429 clean_tx_pools(adapter);
1430}
1431
1432static int __ibmvnic_close(struct net_device *netdev)
1433{
1434 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1435 int rc = 0;
1436
1437 adapter->state = VNIC_CLOSING;
1438 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1439 adapter->state = VNIC_CLOSED;
1440 return rc;
1441}
1442
1443static int ibmvnic_close(struct net_device *netdev)
1444{
1445 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1446 int rc;
1447
1448 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n",
1449 adapter_state_to_string(adapter->state),
1450 adapter->failover_pending,
1451 adapter->force_reset_recovery);
1452
1453 /* If device failover is pending, just set device state and return.
1454 * Device operation will be handled by reset routine.
1455 */
1456 if (adapter->failover_pending) {
1457 adapter->state = VNIC_CLOSED;
1458 return 0;
1459 }
1460
1461 rc = __ibmvnic_close(netdev);
1462 ibmvnic_cleanup(netdev);
1463
1464 return rc;
1465}
1466
1467/**
1468 * build_hdr_data - creates L2/L3/L4 header data buffer
1469 * @hdr_field: bitfield determining needed headers
1470 * @skb: socket buffer
1471 * @hdr_len: array of header lengths
1472 * @hdr_data: buffer to write the header to
1473 *
1474 * Reads hdr_field to determine which headers are needed by firmware.
1475 * Builds a buffer containing these headers. Saves individual header
1476 * lengths and total buffer length to be used to build descriptors.
1477 */
1478static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1479 int *hdr_len, u8 *hdr_data)
1480{
1481 int len = 0;
1482 u8 *hdr;
1483
1484 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1485 hdr_len[0] = sizeof(struct vlan_ethhdr);
1486 else
1487 hdr_len[0] = sizeof(struct ethhdr);
1488
1489 if (skb->protocol == htons(ETH_P_IP)) {
1490 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1491 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1492 hdr_len[2] = tcp_hdrlen(skb);
1493 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1494 hdr_len[2] = sizeof(struct udphdr);
1495 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1496 hdr_len[1] = sizeof(struct ipv6hdr);
1497 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1498 hdr_len[2] = tcp_hdrlen(skb);
1499 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1500 hdr_len[2] = sizeof(struct udphdr);
1501 } else if (skb->protocol == htons(ETH_P_ARP)) {
1502 hdr_len[1] = arp_hdr_len(skb->dev);
1503 hdr_len[2] = 0;
1504 }
1505
1506 memset(hdr_data, 0, 120);
1507 if ((hdr_field >> 6) & 1) {
1508 hdr = skb_mac_header(skb);
1509 memcpy(hdr_data, hdr, hdr_len[0]);
1510 len += hdr_len[0];
1511 }
1512
1513 if ((hdr_field >> 5) & 1) {
1514 hdr = skb_network_header(skb);
1515 memcpy(hdr_data + len, hdr, hdr_len[1]);
1516 len += hdr_len[1];
1517 }
1518
1519 if ((hdr_field >> 4) & 1) {
1520 hdr = skb_transport_header(skb);
1521 memcpy(hdr_data + len, hdr, hdr_len[2]);
1522 len += hdr_len[2];
1523 }
1524 return len;
1525}
1526
1527/**
1528 * create_hdr_descs - create header and header extension descriptors
1529 * @hdr_field: bitfield determining needed headers
1530 * @hdr_data: buffer containing header data
1531 * @len: length of data buffer
1532 * @hdr_len: array of individual header lengths
1533 * @scrq_arr: descriptor array
1534 *
1535 * Creates header and, if needed, header extension descriptors and
1536 * places them in a descriptor array, scrq_arr
1537 */
1538
1539static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1540 union sub_crq *scrq_arr)
1541{
1542 union sub_crq hdr_desc;
1543 int tmp_len = len;
1544 int num_descs = 0;
1545 u8 *data, *cur;
1546 int tmp;
1547
1548 while (tmp_len > 0) {
1549 cur = hdr_data + len - tmp_len;
1550
1551 memset(&hdr_desc, 0, sizeof(hdr_desc));
1552 if (cur != hdr_data) {
1553 data = hdr_desc.hdr_ext.data;
1554 tmp = tmp_len > 29 ? 29 : tmp_len;
1555 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1556 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1557 hdr_desc.hdr_ext.len = tmp;
1558 } else {
1559 data = hdr_desc.hdr.data;
1560 tmp = tmp_len > 24 ? 24 : tmp_len;
1561 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1562 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1563 hdr_desc.hdr.len = tmp;
1564 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1565 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1566 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1567 hdr_desc.hdr.flag = hdr_field << 1;
1568 }
1569 memcpy(data, cur, tmp);
1570 tmp_len -= tmp;
1571 *scrq_arr = hdr_desc;
1572 scrq_arr++;
1573 num_descs++;
1574 }
1575
1576 return num_descs;
1577}
1578
1579/**
1580 * build_hdr_descs_arr - build a header descriptor array
1581 * @skb: tx socket buffer
1582 * @indir_arr: indirect array
1583 * @num_entries: number of descriptors to be sent
1584 * @hdr_field: bit field determining which headers will be sent
1585 *
1586 * This function will build a TX descriptor array with applicable
1587 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1588 */
1589
1590static void build_hdr_descs_arr(struct sk_buff *skb,
1591 union sub_crq *indir_arr,
1592 int *num_entries, u8 hdr_field)
1593{
1594 int hdr_len[3] = {0, 0, 0};
1595 u8 hdr_data[140] = {0};
1596 int tot_len;
1597
1598 tot_len = build_hdr_data(hdr_field, skb, hdr_len,
1599 hdr_data);
1600 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1601 indir_arr + 1);
1602}
1603
1604static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1605 struct net_device *netdev)
1606{
1607 /* For some backing devices, mishandling of small packets
1608 * can result in a loss of connection or TX stall. Device
1609 * architects recommend that no packet should be smaller
1610 * than the minimum MTU value provided to the driver, so
1611 * pad any packets to that length
1612 */
1613 if (skb->len < netdev->min_mtu)
1614 return skb_put_padto(skb, netdev->min_mtu);
1615
1616 return 0;
1617}
1618
1619static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
1620 struct ibmvnic_sub_crq_queue *tx_scrq)
1621{
1622 struct ibmvnic_ind_xmit_queue *ind_bufp;
1623 struct ibmvnic_tx_buff *tx_buff;
1624 struct ibmvnic_tx_pool *tx_pool;
1625 union sub_crq tx_scrq_entry;
1626 int queue_num;
1627 int entries;
1628 int index;
1629 int i;
1630
1631 ind_bufp = &tx_scrq->ind_buf;
1632 entries = (u64)ind_bufp->index;
1633 queue_num = tx_scrq->pool_index;
1634
1635 for (i = entries - 1; i >= 0; --i) {
1636 tx_scrq_entry = ind_bufp->indir_arr[i];
1637 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
1638 continue;
1639 index = be32_to_cpu(tx_scrq_entry.v1.correlator);
1640 if (index & IBMVNIC_TSO_POOL_MASK) {
1641 tx_pool = &adapter->tso_pool[queue_num];
1642 index &= ~IBMVNIC_TSO_POOL_MASK;
1643 } else {
1644 tx_pool = &adapter->tx_pool[queue_num];
1645 }
1646 tx_pool->free_map[tx_pool->consumer_index] = index;
1647 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1648 tx_pool->num_buffers - 1 :
1649 tx_pool->consumer_index - 1;
1650 tx_buff = &tx_pool->tx_buff[index];
1651 adapter->netdev->stats.tx_packets--;
1652 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
1653 adapter->tx_stats_buffers[queue_num].packets--;
1654 adapter->tx_stats_buffers[queue_num].bytes -=
1655 tx_buff->skb->len;
1656 dev_kfree_skb_any(tx_buff->skb);
1657 tx_buff->skb = NULL;
1658 adapter->netdev->stats.tx_dropped++;
1659 }
1660 ind_bufp->index = 0;
1661 if (atomic_sub_return(entries, &tx_scrq->used) <=
1662 (adapter->req_tx_entries_per_subcrq / 2) &&
1663 __netif_subqueue_stopped(adapter->netdev, queue_num) &&
1664 !test_bit(0, &adapter->resetting)) {
1665 netif_wake_subqueue(adapter->netdev, queue_num);
1666 netdev_dbg(adapter->netdev, "Started queue %d\n",
1667 queue_num);
1668 }
1669}
1670
1671static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
1672 struct ibmvnic_sub_crq_queue *tx_scrq)
1673{
1674 struct ibmvnic_ind_xmit_queue *ind_bufp;
1675 u64 dma_addr;
1676 u64 entries;
1677 u64 handle;
1678 int rc;
1679
1680 ind_bufp = &tx_scrq->ind_buf;
1681 dma_addr = (u64)ind_bufp->indir_dma;
1682 entries = (u64)ind_bufp->index;
1683 handle = tx_scrq->handle;
1684
1685 if (!entries)
1686 return 0;
1687 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
1688 if (rc)
1689 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
1690 else
1691 ind_bufp->index = 0;
1692 return 0;
1693}
1694
1695static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1696{
1697 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1698 int queue_num = skb_get_queue_mapping(skb);
1699 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1700 struct device *dev = &adapter->vdev->dev;
1701 struct ibmvnic_ind_xmit_queue *ind_bufp;
1702 struct ibmvnic_tx_buff *tx_buff = NULL;
1703 struct ibmvnic_sub_crq_queue *tx_scrq;
1704 struct ibmvnic_tx_pool *tx_pool;
1705 unsigned int tx_send_failed = 0;
1706 netdev_tx_t ret = NETDEV_TX_OK;
1707 unsigned int tx_map_failed = 0;
1708 union sub_crq indir_arr[16];
1709 unsigned int tx_dropped = 0;
1710 unsigned int tx_packets = 0;
1711 unsigned int tx_bytes = 0;
1712 dma_addr_t data_dma_addr;
1713 struct netdev_queue *txq;
1714 unsigned long lpar_rc;
1715 union sub_crq tx_crq;
1716 unsigned int offset;
1717 int num_entries = 1;
1718 unsigned char *dst;
1719 int index = 0;
1720 u8 proto = 0;
1721
1722 tx_scrq = adapter->tx_scrq[queue_num];
1723 txq = netdev_get_tx_queue(netdev, queue_num);
1724 ind_bufp = &tx_scrq->ind_buf;
1725
1726 if (test_bit(0, &adapter->resetting)) {
1727 if (!netif_subqueue_stopped(netdev, skb))
1728 netif_stop_subqueue(netdev, queue_num);
1729 dev_kfree_skb_any(skb);
1730
1731 tx_send_failed++;
1732 tx_dropped++;
1733 ret = NETDEV_TX_OK;
1734 goto out;
1735 }
1736
1737 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1738 tx_dropped++;
1739 tx_send_failed++;
1740 ret = NETDEV_TX_OK;
1741 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1742 goto out;
1743 }
1744 if (skb_is_gso(skb))
1745 tx_pool = &adapter->tso_pool[queue_num];
1746 else
1747 tx_pool = &adapter->tx_pool[queue_num];
1748
1749 index = tx_pool->free_map[tx_pool->consumer_index];
1750
1751 if (index == IBMVNIC_INVALID_MAP) {
1752 dev_kfree_skb_any(skb);
1753 tx_send_failed++;
1754 tx_dropped++;
1755 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1756 ret = NETDEV_TX_OK;
1757 goto out;
1758 }
1759
1760 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1761
1762 offset = index * tx_pool->buf_size;
1763 dst = tx_pool->long_term_buff.buff + offset;
1764 memset(dst, 0, tx_pool->buf_size);
1765 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1766
1767 if (skb_shinfo(skb)->nr_frags) {
1768 int cur, i;
1769
1770 /* Copy the head */
1771 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1772 cur = skb_headlen(skb);
1773
1774 /* Copy the frags */
1775 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1776 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1777
1778 memcpy(dst + cur, skb_frag_address(frag),
1779 skb_frag_size(frag));
1780 cur += skb_frag_size(frag);
1781 }
1782 } else {
1783 skb_copy_from_linear_data(skb, dst, skb->len);
1784 }
1785
1786 /* post changes to long_term_buff *dst before VIOS accessing it */
1787 dma_wmb();
1788
1789 tx_pool->consumer_index =
1790 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1791
1792 tx_buff = &tx_pool->tx_buff[index];
1793 tx_buff->skb = skb;
1794 tx_buff->index = index;
1795 tx_buff->pool_index = queue_num;
1796
1797 memset(&tx_crq, 0, sizeof(tx_crq));
1798 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1799 tx_crq.v1.type = IBMVNIC_TX_DESC;
1800 tx_crq.v1.n_crq_elem = 1;
1801 tx_crq.v1.n_sge = 1;
1802 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1803
1804 if (skb_is_gso(skb))
1805 tx_crq.v1.correlator =
1806 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1807 else
1808 tx_crq.v1.correlator = cpu_to_be32(index);
1809 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1810 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1811 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1812
1813 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1814 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1815 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1816 }
1817
1818 if (skb->protocol == htons(ETH_P_IP)) {
1819 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1820 proto = ip_hdr(skb)->protocol;
1821 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1822 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1823 proto = ipv6_hdr(skb)->nexthdr;
1824 }
1825
1826 if (proto == IPPROTO_TCP)
1827 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1828 else if (proto == IPPROTO_UDP)
1829 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1830
1831 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1832 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1833 hdrs += 2;
1834 }
1835 if (skb_is_gso(skb)) {
1836 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1837 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1838 hdrs += 2;
1839 }
1840
1841 if ((*hdrs >> 7) & 1)
1842 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
1843
1844 tx_crq.v1.n_crq_elem = num_entries;
1845 tx_buff->num_entries = num_entries;
1846 /* flush buffer if current entry can not fit */
1847 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
1848 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1849 if (lpar_rc != H_SUCCESS)
1850 goto tx_flush_err;
1851 }
1852
1853 indir_arr[0] = tx_crq;
1854 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
1855 num_entries * sizeof(struct ibmvnic_generic_scrq));
1856 ind_bufp->index += num_entries;
1857 if (__netdev_tx_sent_queue(txq, skb->len,
1858 netdev_xmit_more() &&
1859 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
1860 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1861 if (lpar_rc != H_SUCCESS)
1862 goto tx_err;
1863 }
1864
1865 if (atomic_add_return(num_entries, &tx_scrq->used)
1866 >= adapter->req_tx_entries_per_subcrq) {
1867 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1868 netif_stop_subqueue(netdev, queue_num);
1869 }
1870
1871 tx_packets++;
1872 tx_bytes += skb->len;
1873 txq->trans_start = jiffies;
1874 ret = NETDEV_TX_OK;
1875 goto out;
1876
1877tx_flush_err:
1878 dev_kfree_skb_any(skb);
1879 tx_buff->skb = NULL;
1880 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1881 tx_pool->num_buffers - 1 :
1882 tx_pool->consumer_index - 1;
1883 tx_dropped++;
1884tx_err:
1885 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1886 dev_err_ratelimited(dev, "tx: send failed\n");
1887
1888 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1889 /* Disable TX and report carrier off if queue is closed
1890 * or pending failover.
1891 * Firmware guarantees that a signal will be sent to the
1892 * driver, triggering a reset or some other action.
1893 */
1894 netif_tx_stop_all_queues(netdev);
1895 netif_carrier_off(netdev);
1896 }
1897out:
1898 netdev->stats.tx_dropped += tx_dropped;
1899 netdev->stats.tx_bytes += tx_bytes;
1900 netdev->stats.tx_packets += tx_packets;
1901 adapter->tx_send_failed += tx_send_failed;
1902 adapter->tx_map_failed += tx_map_failed;
1903 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1904 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1905 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1906
1907 return ret;
1908}
1909
1910static void ibmvnic_set_multi(struct net_device *netdev)
1911{
1912 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1913 struct netdev_hw_addr *ha;
1914 union ibmvnic_crq crq;
1915
1916 memset(&crq, 0, sizeof(crq));
1917 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1918 crq.request_capability.cmd = REQUEST_CAPABILITY;
1919
1920 if (netdev->flags & IFF_PROMISC) {
1921 if (!adapter->promisc_supported)
1922 return;
1923 } else {
1924 if (netdev->flags & IFF_ALLMULTI) {
1925 /* Accept all multicast */
1926 memset(&crq, 0, sizeof(crq));
1927 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1928 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1929 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1930 ibmvnic_send_crq(adapter, &crq);
1931 } else if (netdev_mc_empty(netdev)) {
1932 /* Reject all multicast */
1933 memset(&crq, 0, sizeof(crq));
1934 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1935 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1936 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1937 ibmvnic_send_crq(adapter, &crq);
1938 } else {
1939 /* Accept one or more multicast(s) */
1940 netdev_for_each_mc_addr(ha, netdev) {
1941 memset(&crq, 0, sizeof(crq));
1942 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1943 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1944 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1945 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1946 ha->addr);
1947 ibmvnic_send_crq(adapter, &crq);
1948 }
1949 }
1950 }
1951}
1952
1953static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1954{
1955 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1956 union ibmvnic_crq crq;
1957 int rc;
1958
1959 if (!is_valid_ether_addr(dev_addr)) {
1960 rc = -EADDRNOTAVAIL;
1961 goto err;
1962 }
1963
1964 memset(&crq, 0, sizeof(crq));
1965 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1966 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1967 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1968
1969 mutex_lock(&adapter->fw_lock);
1970 adapter->fw_done_rc = 0;
1971 reinit_completion(&adapter->fw_done);
1972
1973 rc = ibmvnic_send_crq(adapter, &crq);
1974 if (rc) {
1975 rc = -EIO;
1976 mutex_unlock(&adapter->fw_lock);
1977 goto err;
1978 }
1979
1980 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1981 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1982 if (rc || adapter->fw_done_rc) {
1983 rc = -EIO;
1984 mutex_unlock(&adapter->fw_lock);
1985 goto err;
1986 }
1987 mutex_unlock(&adapter->fw_lock);
1988 return 0;
1989err:
1990 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1991 return rc;
1992}
1993
1994static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1995{
1996 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1997 struct sockaddr *addr = p;
1998 int rc;
1999
2000 rc = 0;
2001 if (!is_valid_ether_addr(addr->sa_data))
2002 return -EADDRNOTAVAIL;
2003
2004 ether_addr_copy(adapter->mac_addr, addr->sa_data);
2005 if (adapter->state != VNIC_PROBED)
2006 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
2007
2008 return rc;
2009}
2010
2011static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
2012{
2013 switch (reason) {
2014 case VNIC_RESET_FAILOVER:
2015 return "FAILOVER";
2016 case VNIC_RESET_MOBILITY:
2017 return "MOBILITY";
2018 case VNIC_RESET_FATAL:
2019 return "FATAL";
2020 case VNIC_RESET_NON_FATAL:
2021 return "NON_FATAL";
2022 case VNIC_RESET_TIMEOUT:
2023 return "TIMEOUT";
2024 case VNIC_RESET_CHANGE_PARAM:
2025 return "CHANGE_PARAM";
2026 case VNIC_RESET_PASSIVE_INIT:
2027 return "PASSIVE_INIT";
2028 }
2029 return "UNKNOWN";
2030}
2031
2032/*
2033 * do_reset returns zero if we are able to keep processing reset events, or
2034 * non-zero if we hit a fatal error and must halt.
2035 */
2036static int do_reset(struct ibmvnic_adapter *adapter,
2037 struct ibmvnic_rwi *rwi, u32 reset_state)
2038{
2039 u64 old_num_rx_queues, old_num_tx_queues;
2040 u64 old_num_rx_slots, old_num_tx_slots;
2041 struct net_device *netdev = adapter->netdev;
2042 int rc;
2043
2044 netdev_dbg(adapter->netdev,
2045 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n",
2046 adapter_state_to_string(adapter->state),
2047 adapter->failover_pending,
2048 reset_reason_to_string(rwi->reset_reason),
2049 adapter_state_to_string(reset_state));
2050
2051 adapter->reset_reason = rwi->reset_reason;
2052 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
2053 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2054 rtnl_lock();
2055
2056 /* Now that we have the rtnl lock, clear any pending failover.
2057 * This will ensure ibmvnic_open() has either completed or will
2058 * block until failover is complete.
2059 */
2060 if (rwi->reset_reason == VNIC_RESET_FAILOVER)
2061 adapter->failover_pending = false;
2062
2063 /* read the state and check (again) after getting rtnl */
2064 reset_state = adapter->state;
2065
2066 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2067 rc = -EBUSY;
2068 goto out;
2069 }
2070
2071 netif_carrier_off(netdev);
2072
2073 old_num_rx_queues = adapter->req_rx_queues;
2074 old_num_tx_queues = adapter->req_tx_queues;
2075 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
2076 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
2077
2078 ibmvnic_cleanup(netdev);
2079
2080 if (reset_state == VNIC_OPEN &&
2081 adapter->reset_reason != VNIC_RESET_MOBILITY &&
2082 adapter->reset_reason != VNIC_RESET_FAILOVER) {
2083 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2084 rc = __ibmvnic_close(netdev);
2085 if (rc)
2086 goto out;
2087 } else {
2088 adapter->state = VNIC_CLOSING;
2089
2090 /* Release the RTNL lock before link state change and
2091 * re-acquire after the link state change to allow
2092 * linkwatch_event to grab the RTNL lock and run during
2093 * a reset.
2094 */
2095 rtnl_unlock();
2096 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
2097 rtnl_lock();
2098 if (rc)
2099 goto out;
2100
2101 if (adapter->state == VNIC_OPEN) {
2102 /* When we dropped rtnl, ibmvnic_open() got
2103 * it and noticed that we are resetting and
2104 * set the adapter state to OPEN. Update our
2105 * new "target" state, and resume the reset
2106 * from VNIC_CLOSING state.
2107 */
2108 netdev_dbg(netdev,
2109 "Open changed state from %s, updating.\n",
2110 adapter_state_to_string(reset_state));
2111 reset_state = VNIC_OPEN;
2112 adapter->state = VNIC_CLOSING;
2113 }
2114
2115 if (adapter->state != VNIC_CLOSING) {
2116 /* If someone else changed the adapter state
2117 * when we dropped the rtnl, fail the reset
2118 */
2119 rc = -1;
2120 goto out;
2121 }
2122 adapter->state = VNIC_CLOSED;
2123 }
2124 }
2125
2126 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2127 release_resources(adapter);
2128 release_sub_crqs(adapter, 1);
2129 release_crq_queue(adapter);
2130 }
2131
2132 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2133 /* remove the closed state so when we call open it appears
2134 * we are coming from the probed state.
2135 */
2136 adapter->state = VNIC_PROBED;
2137
2138 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2139 rc = init_crq_queue(adapter);
2140 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
2141 rc = ibmvnic_reenable_crq_queue(adapter);
2142 release_sub_crqs(adapter, 1);
2143 } else {
2144 rc = ibmvnic_reset_crq(adapter);
2145 if (rc == H_CLOSED || rc == H_SUCCESS) {
2146 rc = vio_enable_interrupts(adapter->vdev);
2147 if (rc)
2148 netdev_err(adapter->netdev,
2149 "Reset failed to enable interrupts. rc=%d\n",
2150 rc);
2151 }
2152 }
2153
2154 if (rc) {
2155 netdev_err(adapter->netdev,
2156 "Reset couldn't initialize crq. rc=%d\n", rc);
2157 goto out;
2158 }
2159
2160 rc = ibmvnic_reset_init(adapter, true);
2161 if (rc) {
2162 rc = IBMVNIC_INIT_FAILED;
2163 goto out;
2164 }
2165
2166 /* If the adapter was in PROBE or DOWN state prior to the reset,
2167 * exit here.
2168 */
2169 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) {
2170 rc = 0;
2171 goto out;
2172 }
2173
2174 rc = ibmvnic_login(netdev);
2175 if (rc)
2176 goto out;
2177
2178 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2179 rc = init_resources(adapter);
2180 if (rc)
2181 goto out;
2182 } else if (adapter->req_rx_queues != old_num_rx_queues ||
2183 adapter->req_tx_queues != old_num_tx_queues ||
2184 adapter->req_rx_add_entries_per_subcrq !=
2185 old_num_rx_slots ||
2186 adapter->req_tx_entries_per_subcrq !=
2187 old_num_tx_slots ||
2188 !adapter->rx_pool ||
2189 !adapter->tso_pool ||
2190 !adapter->tx_pool) {
2191 release_rx_pools(adapter);
2192 release_tx_pools(adapter);
2193 release_napi(adapter);
2194 release_vpd_data(adapter);
2195
2196 rc = init_resources(adapter);
2197 if (rc)
2198 goto out;
2199
2200 } else {
2201 rc = reset_tx_pools(adapter);
2202 if (rc) {
2203 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2204 rc);
2205 goto out;
2206 }
2207
2208 rc = reset_rx_pools(adapter);
2209 if (rc) {
2210 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2211 rc);
2212 goto out;
2213 }
2214 }
2215 ibmvnic_disable_irqs(adapter);
2216 }
2217 adapter->state = VNIC_CLOSED;
2218
2219 if (reset_state == VNIC_CLOSED) {
2220 rc = 0;
2221 goto out;
2222 }
2223
2224 rc = __ibmvnic_open(netdev);
2225 if (rc) {
2226 rc = IBMVNIC_OPEN_FAILED;
2227 goto out;
2228 }
2229
2230 /* refresh device's multicast list */
2231 ibmvnic_set_multi(netdev);
2232
2233 if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
2234 adapter->reset_reason == VNIC_RESET_MOBILITY)
2235 __netdev_notify_peers(netdev);
2236
2237 rc = 0;
2238
2239out:
2240 /* restore the adapter state if reset failed */
2241 if (rc)
2242 adapter->state = reset_state;
2243 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
2244 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2245 rtnl_unlock();
2246
2247 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n",
2248 adapter_state_to_string(adapter->state),
2249 adapter->failover_pending, rc);
2250 return rc;
2251}
2252
2253static int do_hard_reset(struct ibmvnic_adapter *adapter,
2254 struct ibmvnic_rwi *rwi, u32 reset_state)
2255{
2256 struct net_device *netdev = adapter->netdev;
2257 int rc;
2258
2259 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n",
2260 reset_reason_to_string(rwi->reset_reason));
2261
2262 /* read the state and check (again) after getting rtnl */
2263 reset_state = adapter->state;
2264
2265 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2266 rc = -EBUSY;
2267 goto out;
2268 }
2269
2270 netif_carrier_off(netdev);
2271 adapter->reset_reason = rwi->reset_reason;
2272
2273 ibmvnic_cleanup(netdev);
2274 release_resources(adapter);
2275 release_sub_crqs(adapter, 0);
2276 release_crq_queue(adapter);
2277
2278 /* remove the closed state so when we call open it appears
2279 * we are coming from the probed state.
2280 */
2281 adapter->state = VNIC_PROBED;
2282
2283 reinit_completion(&adapter->init_done);
2284 rc = init_crq_queue(adapter);
2285 if (rc) {
2286 netdev_err(adapter->netdev,
2287 "Couldn't initialize crq. rc=%d\n", rc);
2288 goto out;
2289 }
2290
2291 rc = ibmvnic_reset_init(adapter, false);
2292 if (rc)
2293 goto out;
2294
2295 /* If the adapter was in PROBE or DOWN state prior to the reset,
2296 * exit here.
2297 */
2298 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN)
2299 goto out;
2300
2301 rc = ibmvnic_login(netdev);
2302 if (rc)
2303 goto out;
2304
2305 rc = init_resources(adapter);
2306 if (rc)
2307 goto out;
2308
2309 ibmvnic_disable_irqs(adapter);
2310 adapter->state = VNIC_CLOSED;
2311
2312 if (reset_state == VNIC_CLOSED)
2313 goto out;
2314
2315 rc = __ibmvnic_open(netdev);
2316 if (rc) {
2317 rc = IBMVNIC_OPEN_FAILED;
2318 goto out;
2319 }
2320
2321 __netdev_notify_peers(netdev);
2322out:
2323 /* restore adapter state if reset failed */
2324 if (rc)
2325 adapter->state = reset_state;
2326 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n",
2327 adapter_state_to_string(adapter->state),
2328 adapter->failover_pending, rc);
2329 return rc;
2330}
2331
2332static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2333{
2334 struct ibmvnic_rwi *rwi;
2335 unsigned long flags;
2336
2337 spin_lock_irqsave(&adapter->rwi_lock, flags);
2338
2339 if (!list_empty(&adapter->rwi_list)) {
2340 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2341 list);
2342 list_del(&rwi->list);
2343 } else {
2344 rwi = NULL;
2345 }
2346
2347 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2348 return rwi;
2349}
2350
2351/**
2352 * do_passive_init - complete probing when partner device is detected.
2353 * @adapter: ibmvnic_adapter struct
2354 *
2355 * If the ibmvnic device does not have a partner device to communicate with at boot
2356 * and that partner device comes online at a later time, this function is called
2357 * to complete the initialization process of ibmvnic device.
2358 * Caller is expected to hold rtnl_lock().
2359 *
2360 * Returns non-zero if sub-CRQs are not initialized properly leaving the device
2361 * in the down state.
2362 * Returns 0 upon success and the device is in PROBED state.
2363 */
2364
2365static int do_passive_init(struct ibmvnic_adapter *adapter)
2366{
2367 unsigned long timeout = msecs_to_jiffies(30000);
2368 struct net_device *netdev = adapter->netdev;
2369 struct device *dev = &adapter->vdev->dev;
2370 int rc;
2371
2372 netdev_dbg(netdev, "Partner device found, probing.\n");
2373
2374 adapter->state = VNIC_PROBING;
2375 reinit_completion(&adapter->init_done);
2376 adapter->init_done_rc = 0;
2377 adapter->crq.active = true;
2378
2379 rc = send_crq_init_complete(adapter);
2380 if (rc)
2381 goto out;
2382
2383 rc = send_version_xchg(adapter);
2384 if (rc)
2385 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc);
2386
2387 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2388 dev_err(dev, "Initialization sequence timed out\n");
2389 rc = -ETIMEDOUT;
2390 goto out;
2391 }
2392
2393 rc = init_sub_crqs(adapter);
2394 if (rc) {
2395 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc);
2396 goto out;
2397 }
2398
2399 rc = init_sub_crq_irqs(adapter);
2400 if (rc) {
2401 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc);
2402 goto init_failed;
2403 }
2404
2405 netdev->mtu = adapter->req_mtu - ETH_HLEN;
2406 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2407 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2408
2409 adapter->state = VNIC_PROBED;
2410 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n");
2411
2412 return 0;
2413
2414init_failed:
2415 release_sub_crqs(adapter, 1);
2416out:
2417 adapter->state = VNIC_DOWN;
2418 return rc;
2419}
2420
2421static void __ibmvnic_reset(struct work_struct *work)
2422{
2423 struct ibmvnic_adapter *adapter;
2424 bool saved_state = false;
2425 struct ibmvnic_rwi *tmprwi;
2426 struct ibmvnic_rwi *rwi;
2427 unsigned long flags;
2428 u32 reset_state;
2429 int rc = 0;
2430
2431 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2432
2433 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2434 queue_delayed_work(system_long_wq,
2435 &adapter->ibmvnic_delayed_reset,
2436 IBMVNIC_RESET_DELAY);
2437 return;
2438 }
2439
2440 rwi = get_next_rwi(adapter);
2441 while (rwi) {
2442 spin_lock_irqsave(&adapter->state_lock, flags);
2443
2444 if (adapter->state == VNIC_REMOVING ||
2445 adapter->state == VNIC_REMOVED) {
2446 spin_unlock_irqrestore(&adapter->state_lock, flags);
2447 kfree(rwi);
2448 rc = EBUSY;
2449 break;
2450 }
2451
2452 if (!saved_state) {
2453 reset_state = adapter->state;
2454 saved_state = true;
2455 }
2456 spin_unlock_irqrestore(&adapter->state_lock, flags);
2457
2458 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) {
2459 rtnl_lock();
2460 rc = do_passive_init(adapter);
2461 rtnl_unlock();
2462 if (!rc)
2463 netif_carrier_on(adapter->netdev);
2464 } else if (adapter->force_reset_recovery) {
2465 /* Since we are doing a hard reset now, clear the
2466 * failover_pending flag so we don't ignore any
2467 * future MOBILITY or other resets.
2468 */
2469 adapter->failover_pending = false;
2470
2471 /* Transport event occurred during previous reset */
2472 if (adapter->wait_for_reset) {
2473 /* Previous was CHANGE_PARAM; caller locked */
2474 adapter->force_reset_recovery = false;
2475 rc = do_hard_reset(adapter, rwi, reset_state);
2476 } else {
2477 rtnl_lock();
2478 adapter->force_reset_recovery = false;
2479 rc = do_hard_reset(adapter, rwi, reset_state);
2480 rtnl_unlock();
2481 }
2482 if (rc) {
2483 /* give backing device time to settle down */
2484 netdev_dbg(adapter->netdev,
2485 "[S:%s] Hard reset failed, waiting 60 secs\n",
2486 adapter_state_to_string(adapter->state));
2487 set_current_state(TASK_UNINTERRUPTIBLE);
2488 schedule_timeout(60 * HZ);
2489 }
2490 } else {
2491 rc = do_reset(adapter, rwi, reset_state);
2492 }
2493 tmprwi = rwi;
2494 adapter->last_reset_time = jiffies;
2495
2496 if (rc)
2497 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
2498
2499 rwi = get_next_rwi(adapter);
2500
2501 /*
2502 * If there is another reset queued, free the previous rwi
2503 * and process the new reset even if previous reset failed
2504 * (the previous reset could have failed because of a fail
2505 * over for instance, so process the fail over).
2506 *
2507 * If there are no resets queued and the previous reset failed,
2508 * the adapter would be in an undefined state. So retry the
2509 * previous reset as a hard reset.
2510 */
2511 if (rwi)
2512 kfree(tmprwi);
2513 else if (rc)
2514 rwi = tmprwi;
2515
2516 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2517 rwi->reset_reason == VNIC_RESET_MOBILITY || rc))
2518 adapter->force_reset_recovery = true;
2519 }
2520
2521 if (adapter->wait_for_reset) {
2522 adapter->reset_done_rc = rc;
2523 complete(&adapter->reset_done);
2524 }
2525
2526 clear_bit_unlock(0, &adapter->resetting);
2527
2528 netdev_dbg(adapter->netdev,
2529 "[S:%s FRR:%d WFR:%d] Done processing resets\n",
2530 adapter_state_to_string(adapter->state),
2531 adapter->force_reset_recovery,
2532 adapter->wait_for_reset);
2533}
2534
2535static void __ibmvnic_delayed_reset(struct work_struct *work)
2536{
2537 struct ibmvnic_adapter *adapter;
2538
2539 adapter = container_of(work, struct ibmvnic_adapter,
2540 ibmvnic_delayed_reset.work);
2541 __ibmvnic_reset(&adapter->ibmvnic_reset);
2542}
2543
2544static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2545 enum ibmvnic_reset_reason reason)
2546{
2547 struct list_head *entry, *tmp_entry;
2548 struct ibmvnic_rwi *rwi, *tmp;
2549 struct net_device *netdev = adapter->netdev;
2550 unsigned long flags;
2551 int ret;
2552
2553 spin_lock_irqsave(&adapter->rwi_lock, flags);
2554
2555 /* If failover is pending don't schedule any other reset.
2556 * Instead let the failover complete. If there is already a
2557 * a failover reset scheduled, we will detect and drop the
2558 * duplicate reset when walking the ->rwi_list below.
2559 */
2560 if (adapter->state == VNIC_REMOVING ||
2561 adapter->state == VNIC_REMOVED ||
2562 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
2563 ret = EBUSY;
2564 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2565 goto err;
2566 }
2567
2568 if (adapter->state == VNIC_PROBING) {
2569 netdev_warn(netdev, "Adapter reset during probe\n");
2570 adapter->init_done_rc = EAGAIN;
2571 ret = EAGAIN;
2572 goto err;
2573 }
2574
2575 list_for_each_entry(tmp, &adapter->rwi_list, list) {
2576 if (tmp->reset_reason == reason) {
2577 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n",
2578 reset_reason_to_string(reason));
2579 ret = EBUSY;
2580 goto err;
2581 }
2582 }
2583
2584 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2585 if (!rwi) {
2586 ret = ENOMEM;
2587 goto err;
2588 }
2589 /* if we just received a transport event,
2590 * flush reset queue and process this reset
2591 */
2592 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2593 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2594 list_del(entry);
2595 }
2596 rwi->reset_reason = reason;
2597 list_add_tail(&rwi->list, &adapter->rwi_list);
2598 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n",
2599 reset_reason_to_string(reason));
2600 queue_work(system_long_wq, &adapter->ibmvnic_reset);
2601
2602 ret = 0;
2603err:
2604 /* ibmvnic_close() below can block, so drop the lock first */
2605 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2606
2607 if (ret == ENOMEM)
2608 ibmvnic_close(netdev);
2609
2610 return -ret;
2611}
2612
2613static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2614{
2615 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2616
2617 if (test_bit(0, &adapter->resetting)) {
2618 netdev_err(adapter->netdev,
2619 "Adapter is resetting, skip timeout reset\n");
2620 return;
2621 }
2622 /* No queuing up reset until at least 5 seconds (default watchdog val)
2623 * after last reset
2624 */
2625 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
2626 netdev_dbg(dev, "Not yet time to tx timeout.\n");
2627 return;
2628 }
2629 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2630}
2631
2632static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2633 struct ibmvnic_rx_buff *rx_buff)
2634{
2635 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2636
2637 rx_buff->skb = NULL;
2638
2639 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2640 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2641
2642 atomic_dec(&pool->available);
2643}
2644
2645static int ibmvnic_poll(struct napi_struct *napi, int budget)
2646{
2647 struct ibmvnic_sub_crq_queue *rx_scrq;
2648 struct ibmvnic_adapter *adapter;
2649 struct net_device *netdev;
2650 int frames_processed;
2651 int scrq_num;
2652
2653 netdev = napi->dev;
2654 adapter = netdev_priv(netdev);
2655 scrq_num = (int)(napi - adapter->napi);
2656 frames_processed = 0;
2657 rx_scrq = adapter->rx_scrq[scrq_num];
2658
2659restart_poll:
2660 while (frames_processed < budget) {
2661 struct sk_buff *skb;
2662 struct ibmvnic_rx_buff *rx_buff;
2663 union sub_crq *next;
2664 u32 length;
2665 u16 offset;
2666 u8 flags = 0;
2667
2668 if (unlikely(test_bit(0, &adapter->resetting) &&
2669 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2670 enable_scrq_irq(adapter, rx_scrq);
2671 napi_complete_done(napi, frames_processed);
2672 return frames_processed;
2673 }
2674
2675 if (!pending_scrq(adapter, rx_scrq))
2676 break;
2677 next = ibmvnic_next_scrq(adapter, rx_scrq);
2678 rx_buff = (struct ibmvnic_rx_buff *)
2679 be64_to_cpu(next->rx_comp.correlator);
2680 /* do error checking */
2681 if (next->rx_comp.rc) {
2682 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2683 be16_to_cpu(next->rx_comp.rc));
2684 /* free the entry */
2685 next->rx_comp.first = 0;
2686 dev_kfree_skb_any(rx_buff->skb);
2687 remove_buff_from_pool(adapter, rx_buff);
2688 continue;
2689 } else if (!rx_buff->skb) {
2690 /* free the entry */
2691 next->rx_comp.first = 0;
2692 remove_buff_from_pool(adapter, rx_buff);
2693 continue;
2694 }
2695
2696 length = be32_to_cpu(next->rx_comp.len);
2697 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2698 flags = next->rx_comp.flags;
2699 skb = rx_buff->skb;
2700 /* load long_term_buff before copying to skb */
2701 dma_rmb();
2702 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2703 length);
2704
2705 /* VLAN Header has been stripped by the system firmware and
2706 * needs to be inserted by the driver
2707 */
2708 if (adapter->rx_vlan_header_insertion &&
2709 (flags & IBMVNIC_VLAN_STRIPPED))
2710 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2711 ntohs(next->rx_comp.vlan_tci));
2712
2713 /* free the entry */
2714 next->rx_comp.first = 0;
2715 remove_buff_from_pool(adapter, rx_buff);
2716
2717 skb_put(skb, length);
2718 skb->protocol = eth_type_trans(skb, netdev);
2719 skb_record_rx_queue(skb, scrq_num);
2720
2721 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2722 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2723 skb->ip_summed = CHECKSUM_UNNECESSARY;
2724 }
2725
2726 length = skb->len;
2727 napi_gro_receive(napi, skb); /* send it up */
2728 netdev->stats.rx_packets++;
2729 netdev->stats.rx_bytes += length;
2730 adapter->rx_stats_buffers[scrq_num].packets++;
2731 adapter->rx_stats_buffers[scrq_num].bytes += length;
2732 frames_processed++;
2733 }
2734
2735 if (adapter->state != VNIC_CLOSING &&
2736 ((atomic_read(&adapter->rx_pool[scrq_num].available) <
2737 adapter->req_rx_add_entries_per_subcrq / 2) ||
2738 frames_processed < budget))
2739 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2740 if (frames_processed < budget) {
2741 if (napi_complete_done(napi, frames_processed)) {
2742 enable_scrq_irq(adapter, rx_scrq);
2743 if (pending_scrq(adapter, rx_scrq)) {
2744 if (napi_reschedule(napi)) {
2745 disable_scrq_irq(adapter, rx_scrq);
2746 goto restart_poll;
2747 }
2748 }
2749 }
2750 }
2751 return frames_processed;
2752}
2753
2754static int wait_for_reset(struct ibmvnic_adapter *adapter)
2755{
2756 int rc, ret;
2757
2758 adapter->fallback.mtu = adapter->req_mtu;
2759 adapter->fallback.rx_queues = adapter->req_rx_queues;
2760 adapter->fallback.tx_queues = adapter->req_tx_queues;
2761 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2762 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2763
2764 reinit_completion(&adapter->reset_done);
2765 adapter->wait_for_reset = true;
2766 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2767
2768 if (rc) {
2769 ret = rc;
2770 goto out;
2771 }
2772 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2773 if (rc) {
2774 ret = -ENODEV;
2775 goto out;
2776 }
2777
2778 ret = 0;
2779 if (adapter->reset_done_rc) {
2780 ret = -EIO;
2781 adapter->desired.mtu = adapter->fallback.mtu;
2782 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2783 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2784 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2785 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2786
2787 reinit_completion(&adapter->reset_done);
2788 adapter->wait_for_reset = true;
2789 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2790 if (rc) {
2791 ret = rc;
2792 goto out;
2793 }
2794 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2795 60000);
2796 if (rc) {
2797 ret = -ENODEV;
2798 goto out;
2799 }
2800 }
2801out:
2802 adapter->wait_for_reset = false;
2803
2804 return ret;
2805}
2806
2807static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2808{
2809 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2810
2811 adapter->desired.mtu = new_mtu + ETH_HLEN;
2812
2813 return wait_for_reset(adapter);
2814}
2815
2816static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2817 struct net_device *dev,
2818 netdev_features_t features)
2819{
2820 /* Some backing hardware adapters can not
2821 * handle packets with a MSS less than 224
2822 * or with only one segment.
2823 */
2824 if (skb_is_gso(skb)) {
2825 if (skb_shinfo(skb)->gso_size < 224 ||
2826 skb_shinfo(skb)->gso_segs == 1)
2827 features &= ~NETIF_F_GSO_MASK;
2828 }
2829
2830 return features;
2831}
2832
2833static const struct net_device_ops ibmvnic_netdev_ops = {
2834 .ndo_open = ibmvnic_open,
2835 .ndo_stop = ibmvnic_close,
2836 .ndo_start_xmit = ibmvnic_xmit,
2837 .ndo_set_rx_mode = ibmvnic_set_multi,
2838 .ndo_set_mac_address = ibmvnic_set_mac,
2839 .ndo_validate_addr = eth_validate_addr,
2840 .ndo_tx_timeout = ibmvnic_tx_timeout,
2841 .ndo_change_mtu = ibmvnic_change_mtu,
2842 .ndo_features_check = ibmvnic_features_check,
2843};
2844
2845/* ethtool functions */
2846
2847static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2848 struct ethtool_link_ksettings *cmd)
2849{
2850 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2851 int rc;
2852
2853 rc = send_query_phys_parms(adapter);
2854 if (rc) {
2855 adapter->speed = SPEED_UNKNOWN;
2856 adapter->duplex = DUPLEX_UNKNOWN;
2857 }
2858 cmd->base.speed = adapter->speed;
2859 cmd->base.duplex = adapter->duplex;
2860 cmd->base.port = PORT_FIBRE;
2861 cmd->base.phy_address = 0;
2862 cmd->base.autoneg = AUTONEG_ENABLE;
2863
2864 return 0;
2865}
2866
2867static void ibmvnic_get_drvinfo(struct net_device *netdev,
2868 struct ethtool_drvinfo *info)
2869{
2870 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2871
2872 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2873 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2874 strscpy(info->fw_version, adapter->fw_version,
2875 sizeof(info->fw_version));
2876}
2877
2878static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2879{
2880 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2881
2882 return adapter->msg_enable;
2883}
2884
2885static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2886{
2887 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2888
2889 adapter->msg_enable = data;
2890}
2891
2892static u32 ibmvnic_get_link(struct net_device *netdev)
2893{
2894 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2895
2896 /* Don't need to send a query because we request a logical link up at
2897 * init and then we wait for link state indications
2898 */
2899 return adapter->logical_link_state;
2900}
2901
2902static void ibmvnic_get_ringparam(struct net_device *netdev,
2903 struct ethtool_ringparam *ring)
2904{
2905 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2906
2907 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2908 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2909 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2910 } else {
2911 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2912 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2913 }
2914 ring->rx_mini_max_pending = 0;
2915 ring->rx_jumbo_max_pending = 0;
2916 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2917 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2918 ring->rx_mini_pending = 0;
2919 ring->rx_jumbo_pending = 0;
2920}
2921
2922static int ibmvnic_set_ringparam(struct net_device *netdev,
2923 struct ethtool_ringparam *ring)
2924{
2925 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2926 int ret;
2927
2928 ret = 0;
2929 adapter->desired.rx_entries = ring->rx_pending;
2930 adapter->desired.tx_entries = ring->tx_pending;
2931
2932 ret = wait_for_reset(adapter);
2933
2934 if (!ret &&
2935 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2936 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2937 netdev_info(netdev,
2938 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2939 ring->rx_pending, ring->tx_pending,
2940 adapter->req_rx_add_entries_per_subcrq,
2941 adapter->req_tx_entries_per_subcrq);
2942 return ret;
2943}
2944
2945static void ibmvnic_get_channels(struct net_device *netdev,
2946 struct ethtool_channels *channels)
2947{
2948 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2949
2950 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2951 channels->max_rx = adapter->max_rx_queues;
2952 channels->max_tx = adapter->max_tx_queues;
2953 } else {
2954 channels->max_rx = IBMVNIC_MAX_QUEUES;
2955 channels->max_tx = IBMVNIC_MAX_QUEUES;
2956 }
2957
2958 channels->max_other = 0;
2959 channels->max_combined = 0;
2960 channels->rx_count = adapter->req_rx_queues;
2961 channels->tx_count = adapter->req_tx_queues;
2962 channels->other_count = 0;
2963 channels->combined_count = 0;
2964}
2965
2966static int ibmvnic_set_channels(struct net_device *netdev,
2967 struct ethtool_channels *channels)
2968{
2969 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2970 int ret;
2971
2972 ret = 0;
2973 adapter->desired.rx_queues = channels->rx_count;
2974 adapter->desired.tx_queues = channels->tx_count;
2975
2976 ret = wait_for_reset(adapter);
2977
2978 if (!ret &&
2979 (adapter->req_rx_queues != channels->rx_count ||
2980 adapter->req_tx_queues != channels->tx_count))
2981 netdev_info(netdev,
2982 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2983 channels->rx_count, channels->tx_count,
2984 adapter->req_rx_queues, adapter->req_tx_queues);
2985 return ret;
2986}
2987
2988static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2989{
2990 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2991 int i;
2992
2993 switch (stringset) {
2994 case ETH_SS_STATS:
2995 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2996 i++, data += ETH_GSTRING_LEN)
2997 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2998
2999 for (i = 0; i < adapter->req_tx_queues; i++) {
3000 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
3001 data += ETH_GSTRING_LEN;
3002
3003 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
3004 data += ETH_GSTRING_LEN;
3005
3006 snprintf(data, ETH_GSTRING_LEN,
3007 "tx%d_dropped_packets", i);
3008 data += ETH_GSTRING_LEN;
3009 }
3010
3011 for (i = 0; i < adapter->req_rx_queues; i++) {
3012 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
3013 data += ETH_GSTRING_LEN;
3014
3015 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
3016 data += ETH_GSTRING_LEN;
3017
3018 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
3019 data += ETH_GSTRING_LEN;
3020 }
3021 break;
3022
3023 case ETH_SS_PRIV_FLAGS:
3024 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
3025 strcpy(data + i * ETH_GSTRING_LEN,
3026 ibmvnic_priv_flags[i]);
3027 break;
3028 default:
3029 return;
3030 }
3031}
3032
3033static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
3034{
3035 struct ibmvnic_adapter *adapter = netdev_priv(dev);
3036
3037 switch (sset) {
3038 case ETH_SS_STATS:
3039 return ARRAY_SIZE(ibmvnic_stats) +
3040 adapter->req_tx_queues * NUM_TX_STATS +
3041 adapter->req_rx_queues * NUM_RX_STATS;
3042 case ETH_SS_PRIV_FLAGS:
3043 return ARRAY_SIZE(ibmvnic_priv_flags);
3044 default:
3045 return -EOPNOTSUPP;
3046 }
3047}
3048
3049static void ibmvnic_get_ethtool_stats(struct net_device *dev,
3050 struct ethtool_stats *stats, u64 *data)
3051{
3052 struct ibmvnic_adapter *adapter = netdev_priv(dev);
3053 union ibmvnic_crq crq;
3054 int i, j;
3055 int rc;
3056
3057 memset(&crq, 0, sizeof(crq));
3058 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
3059 crq.request_statistics.cmd = REQUEST_STATISTICS;
3060 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
3061 crq.request_statistics.len =
3062 cpu_to_be32(sizeof(struct ibmvnic_statistics));
3063
3064 /* Wait for data to be written */
3065 reinit_completion(&adapter->stats_done);
3066 rc = ibmvnic_send_crq(adapter, &crq);
3067 if (rc)
3068 return;
3069 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
3070 if (rc)
3071 return;
3072
3073 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
3074 data[i] = be64_to_cpu(IBMVNIC_GET_STAT
3075 (adapter, ibmvnic_stats[i].offset));
3076
3077 for (j = 0; j < adapter->req_tx_queues; j++) {
3078 data[i] = adapter->tx_stats_buffers[j].packets;
3079 i++;
3080 data[i] = adapter->tx_stats_buffers[j].bytes;
3081 i++;
3082 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
3083 i++;
3084 }
3085
3086 for (j = 0; j < adapter->req_rx_queues; j++) {
3087 data[i] = adapter->rx_stats_buffers[j].packets;
3088 i++;
3089 data[i] = adapter->rx_stats_buffers[j].bytes;
3090 i++;
3091 data[i] = adapter->rx_stats_buffers[j].interrupts;
3092 i++;
3093 }
3094}
3095
3096static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
3097{
3098 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3099
3100 return adapter->priv_flags;
3101}
3102
3103static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
3104{
3105 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3106 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
3107
3108 if (which_maxes)
3109 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
3110 else
3111 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
3112
3113 return 0;
3114}
3115
3116static const struct ethtool_ops ibmvnic_ethtool_ops = {
3117 .get_drvinfo = ibmvnic_get_drvinfo,
3118 .get_msglevel = ibmvnic_get_msglevel,
3119 .set_msglevel = ibmvnic_set_msglevel,
3120 .get_link = ibmvnic_get_link,
3121 .get_ringparam = ibmvnic_get_ringparam,
3122 .set_ringparam = ibmvnic_set_ringparam,
3123 .get_channels = ibmvnic_get_channels,
3124 .set_channels = ibmvnic_set_channels,
3125 .get_strings = ibmvnic_get_strings,
3126 .get_sset_count = ibmvnic_get_sset_count,
3127 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
3128 .get_link_ksettings = ibmvnic_get_link_ksettings,
3129 .get_priv_flags = ibmvnic_get_priv_flags,
3130 .set_priv_flags = ibmvnic_set_priv_flags,
3131};
3132
3133/* Routines for managing CRQs/sCRQs */
3134
3135static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
3136 struct ibmvnic_sub_crq_queue *scrq)
3137{
3138 int rc;
3139
3140 if (!scrq) {
3141 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
3142 return -EINVAL;
3143 }
3144
3145 if (scrq->irq) {
3146 free_irq(scrq->irq, scrq);
3147 irq_dispose_mapping(scrq->irq);
3148 scrq->irq = 0;
3149 }
3150
3151 if (scrq->msgs) {
3152 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
3153 atomic_set(&scrq->used, 0);
3154 scrq->cur = 0;
3155 scrq->ind_buf.index = 0;
3156 } else {
3157 netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
3158 return -EINVAL;
3159 }
3160
3161 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3162 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3163 return rc;
3164}
3165
3166static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
3167{
3168 int i, rc;
3169
3170 if (!adapter->tx_scrq || !adapter->rx_scrq)
3171 return -EINVAL;
3172
3173 for (i = 0; i < adapter->req_tx_queues; i++) {
3174 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
3175 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
3176 if (rc)
3177 return rc;
3178 }
3179
3180 for (i = 0; i < adapter->req_rx_queues; i++) {
3181 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
3182 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
3183 if (rc)
3184 return rc;
3185 }
3186
3187 return rc;
3188}
3189
3190static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
3191 struct ibmvnic_sub_crq_queue *scrq,
3192 bool do_h_free)
3193{
3194 struct device *dev = &adapter->vdev->dev;
3195 long rc;
3196
3197 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
3198
3199 if (do_h_free) {
3200 /* Close the sub-crqs */
3201 do {
3202 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3203 adapter->vdev->unit_address,
3204 scrq->crq_num);
3205 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3206
3207 if (rc) {
3208 netdev_err(adapter->netdev,
3209 "Failed to release sub-CRQ %16lx, rc = %ld\n",
3210 scrq->crq_num, rc);
3211 }
3212 }
3213
3214 dma_free_coherent(dev,
3215 IBMVNIC_IND_ARR_SZ,
3216 scrq->ind_buf.indir_arr,
3217 scrq->ind_buf.indir_dma);
3218
3219 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3220 DMA_BIDIRECTIONAL);
3221 free_pages((unsigned long)scrq->msgs, 2);
3222 kfree(scrq);
3223}
3224
3225static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
3226 *adapter)
3227{
3228 struct device *dev = &adapter->vdev->dev;
3229 struct ibmvnic_sub_crq_queue *scrq;
3230 int rc;
3231
3232 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
3233 if (!scrq)
3234 return NULL;
3235
3236 scrq->msgs =
3237 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
3238 if (!scrq->msgs) {
3239 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
3240 goto zero_page_failed;
3241 }
3242
3243 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
3244 DMA_BIDIRECTIONAL);
3245 if (dma_mapping_error(dev, scrq->msg_token)) {
3246 dev_warn(dev, "Couldn't map crq queue messages page\n");
3247 goto map_failed;
3248 }
3249
3250 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3251 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3252
3253 if (rc == H_RESOURCE)
3254 rc = ibmvnic_reset_crq(adapter);
3255
3256 if (rc == H_CLOSED) {
3257 dev_warn(dev, "Partner adapter not ready, waiting.\n");
3258 } else if (rc) {
3259 dev_warn(dev, "Error %d registering sub-crq\n", rc);
3260 goto reg_failed;
3261 }
3262
3263 scrq->adapter = adapter;
3264 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
3265 scrq->ind_buf.index = 0;
3266
3267 scrq->ind_buf.indir_arr =
3268 dma_alloc_coherent(dev,
3269 IBMVNIC_IND_ARR_SZ,
3270 &scrq->ind_buf.indir_dma,
3271 GFP_KERNEL);
3272
3273 if (!scrq->ind_buf.indir_arr)
3274 goto indir_failed;
3275
3276 spin_lock_init(&scrq->lock);
3277
3278 netdev_dbg(adapter->netdev,
3279 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
3280 scrq->crq_num, scrq->hw_irq, scrq->irq);
3281
3282 return scrq;
3283
3284indir_failed:
3285 do {
3286 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3287 adapter->vdev->unit_address,
3288 scrq->crq_num);
3289 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
3290reg_failed:
3291 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3292 DMA_BIDIRECTIONAL);
3293map_failed:
3294 free_pages((unsigned long)scrq->msgs, 2);
3295zero_page_failed:
3296 kfree(scrq);
3297
3298 return NULL;
3299}
3300
3301static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
3302{
3303 int i;
3304
3305 if (adapter->tx_scrq) {
3306 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
3307 if (!adapter->tx_scrq[i])
3308 continue;
3309
3310 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
3311 i);
3312 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
3313 if (adapter->tx_scrq[i]->irq) {
3314 free_irq(adapter->tx_scrq[i]->irq,
3315 adapter->tx_scrq[i]);
3316 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
3317 adapter->tx_scrq[i]->irq = 0;
3318 }
3319
3320 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
3321 do_h_free);
3322 }
3323
3324 kfree(adapter->tx_scrq);
3325 adapter->tx_scrq = NULL;
3326 adapter->num_active_tx_scrqs = 0;
3327 }
3328
3329 if (adapter->rx_scrq) {
3330 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
3331 if (!adapter->rx_scrq[i])
3332 continue;
3333
3334 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
3335 i);
3336 if (adapter->rx_scrq[i]->irq) {
3337 free_irq(adapter->rx_scrq[i]->irq,
3338 adapter->rx_scrq[i]);
3339 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
3340 adapter->rx_scrq[i]->irq = 0;
3341 }
3342
3343 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
3344 do_h_free);
3345 }
3346
3347 kfree(adapter->rx_scrq);
3348 adapter->rx_scrq = NULL;
3349 adapter->num_active_rx_scrqs = 0;
3350 }
3351}
3352
3353static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3354 struct ibmvnic_sub_crq_queue *scrq)
3355{
3356 struct device *dev = &adapter->vdev->dev;
3357 unsigned long rc;
3358
3359 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3360 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3361 if (rc)
3362 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3363 scrq->hw_irq, rc);
3364 return rc;
3365}
3366
3367static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3368 struct ibmvnic_sub_crq_queue *scrq)
3369{
3370 struct device *dev = &adapter->vdev->dev;
3371 unsigned long rc;
3372
3373 if (scrq->hw_irq > 0x100000000ULL) {
3374 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3375 return 1;
3376 }
3377
3378 if (test_bit(0, &adapter->resetting) &&
3379 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3380 u64 val = (0xff000000) | scrq->hw_irq;
3381
3382 rc = plpar_hcall_norets(H_EOI, val);
3383 /* H_EOI would fail with rc = H_FUNCTION when running
3384 * in XIVE mode which is expected, but not an error.
3385 */
3386 if (rc && (rc != H_FUNCTION))
3387 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3388 val, rc);
3389 }
3390
3391 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3392 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3393 if (rc)
3394 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3395 scrq->hw_irq, rc);
3396 return rc;
3397}
3398
3399static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3400 struct ibmvnic_sub_crq_queue *scrq)
3401{
3402 struct device *dev = &adapter->vdev->dev;
3403 struct ibmvnic_tx_pool *tx_pool;
3404 struct ibmvnic_tx_buff *txbuff;
3405 struct netdev_queue *txq;
3406 union sub_crq *next;
3407 int index;
3408 int i;
3409
3410restart_loop:
3411 while (pending_scrq(adapter, scrq)) {
3412 unsigned int pool = scrq->pool_index;
3413 int num_entries = 0;
3414 int total_bytes = 0;
3415 int num_packets = 0;
3416
3417 next = ibmvnic_next_scrq(adapter, scrq);
3418 for (i = 0; i < next->tx_comp.num_comps; i++) {
3419 index = be32_to_cpu(next->tx_comp.correlators[i]);
3420 if (index & IBMVNIC_TSO_POOL_MASK) {
3421 tx_pool = &adapter->tso_pool[pool];
3422 index &= ~IBMVNIC_TSO_POOL_MASK;
3423 } else {
3424 tx_pool = &adapter->tx_pool[pool];
3425 }
3426
3427 txbuff = &tx_pool->tx_buff[index];
3428 num_packets++;
3429 num_entries += txbuff->num_entries;
3430 if (txbuff->skb) {
3431 total_bytes += txbuff->skb->len;
3432 if (next->tx_comp.rcs[i]) {
3433 dev_err(dev, "tx error %x\n",
3434 next->tx_comp.rcs[i]);
3435 dev_kfree_skb_irq(txbuff->skb);
3436 } else {
3437 dev_consume_skb_irq(txbuff->skb);
3438 }
3439 txbuff->skb = NULL;
3440 } else {
3441 netdev_warn(adapter->netdev,
3442 "TX completion received with NULL socket buffer\n");
3443 }
3444 tx_pool->free_map[tx_pool->producer_index] = index;
3445 tx_pool->producer_index =
3446 (tx_pool->producer_index + 1) %
3447 tx_pool->num_buffers;
3448 }
3449 /* remove tx_comp scrq*/
3450 next->tx_comp.first = 0;
3451
3452 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
3453 netdev_tx_completed_queue(txq, num_packets, total_bytes);
3454
3455 if (atomic_sub_return(num_entries, &scrq->used) <=
3456 (adapter->req_tx_entries_per_subcrq / 2) &&
3457 __netif_subqueue_stopped(adapter->netdev,
3458 scrq->pool_index)) {
3459 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3460 netdev_dbg(adapter->netdev, "Started queue %d\n",
3461 scrq->pool_index);
3462 }
3463 }
3464
3465 enable_scrq_irq(adapter, scrq);
3466
3467 if (pending_scrq(adapter, scrq)) {
3468 disable_scrq_irq(adapter, scrq);
3469 goto restart_loop;
3470 }
3471
3472 return 0;
3473}
3474
3475static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3476{
3477 struct ibmvnic_sub_crq_queue *scrq = instance;
3478 struct ibmvnic_adapter *adapter = scrq->adapter;
3479
3480 disable_scrq_irq(adapter, scrq);
3481 ibmvnic_complete_tx(adapter, scrq);
3482
3483 return IRQ_HANDLED;
3484}
3485
3486static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3487{
3488 struct ibmvnic_sub_crq_queue *scrq = instance;
3489 struct ibmvnic_adapter *adapter = scrq->adapter;
3490
3491 /* When booting a kdump kernel we can hit pending interrupts
3492 * prior to completing driver initialization.
3493 */
3494 if (unlikely(adapter->state != VNIC_OPEN))
3495 return IRQ_NONE;
3496
3497 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3498
3499 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3500 disable_scrq_irq(adapter, scrq);
3501 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3502 }
3503
3504 return IRQ_HANDLED;
3505}
3506
3507static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3508{
3509 struct device *dev = &adapter->vdev->dev;
3510 struct ibmvnic_sub_crq_queue *scrq;
3511 int i = 0, j = 0;
3512 int rc = 0;
3513
3514 for (i = 0; i < adapter->req_tx_queues; i++) {
3515 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3516 i);
3517 scrq = adapter->tx_scrq[i];
3518 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3519
3520 if (!scrq->irq) {
3521 rc = -EINVAL;
3522 dev_err(dev, "Error mapping irq\n");
3523 goto req_tx_irq_failed;
3524 }
3525
3526 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3527 adapter->vdev->unit_address, i);
3528 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3529 0, scrq->name, scrq);
3530
3531 if (rc) {
3532 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3533 scrq->irq, rc);
3534 irq_dispose_mapping(scrq->irq);
3535 goto req_tx_irq_failed;
3536 }
3537 }
3538
3539 for (i = 0; i < adapter->req_rx_queues; i++) {
3540 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3541 i);
3542 scrq = adapter->rx_scrq[i];
3543 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3544 if (!scrq->irq) {
3545 rc = -EINVAL;
3546 dev_err(dev, "Error mapping irq\n");
3547 goto req_rx_irq_failed;
3548 }
3549 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3550 adapter->vdev->unit_address, i);
3551 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3552 0, scrq->name, scrq);
3553 if (rc) {
3554 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3555 scrq->irq, rc);
3556 irq_dispose_mapping(scrq->irq);
3557 goto req_rx_irq_failed;
3558 }
3559 }
3560 return rc;
3561
3562req_rx_irq_failed:
3563 for (j = 0; j < i; j++) {
3564 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3565 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3566 }
3567 i = adapter->req_tx_queues;
3568req_tx_irq_failed:
3569 for (j = 0; j < i; j++) {
3570 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3571 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3572 }
3573 release_sub_crqs(adapter, 1);
3574 return rc;
3575}
3576
3577static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3578{
3579 struct device *dev = &adapter->vdev->dev;
3580 struct ibmvnic_sub_crq_queue **allqueues;
3581 int registered_queues = 0;
3582 int total_queues;
3583 int more = 0;
3584 int i;
3585
3586 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3587
3588 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3589 if (!allqueues)
3590 return -1;
3591
3592 for (i = 0; i < total_queues; i++) {
3593 allqueues[i] = init_sub_crq_queue(adapter);
3594 if (!allqueues[i]) {
3595 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3596 break;
3597 }
3598 registered_queues++;
3599 }
3600
3601 /* Make sure we were able to register the minimum number of queues */
3602 if (registered_queues <
3603 adapter->min_tx_queues + adapter->min_rx_queues) {
3604 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3605 goto tx_failed;
3606 }
3607
3608 /* Distribute the failed allocated queues*/
3609 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3610 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3611 switch (i % 3) {
3612 case 0:
3613 if (adapter->req_rx_queues > adapter->min_rx_queues)
3614 adapter->req_rx_queues--;
3615 else
3616 more++;
3617 break;
3618 case 1:
3619 if (adapter->req_tx_queues > adapter->min_tx_queues)
3620 adapter->req_tx_queues--;
3621 else
3622 more++;
3623 break;
3624 }
3625 }
3626
3627 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3628 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3629 if (!adapter->tx_scrq)
3630 goto tx_failed;
3631
3632 for (i = 0; i < adapter->req_tx_queues; i++) {
3633 adapter->tx_scrq[i] = allqueues[i];
3634 adapter->tx_scrq[i]->pool_index = i;
3635 adapter->num_active_tx_scrqs++;
3636 }
3637
3638 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3639 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3640 if (!adapter->rx_scrq)
3641 goto rx_failed;
3642
3643 for (i = 0; i < adapter->req_rx_queues; i++) {
3644 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3645 adapter->rx_scrq[i]->scrq_num = i;
3646 adapter->num_active_rx_scrqs++;
3647 }
3648
3649 kfree(allqueues);
3650 return 0;
3651
3652rx_failed:
3653 kfree(adapter->tx_scrq);
3654 adapter->tx_scrq = NULL;
3655tx_failed:
3656 for (i = 0; i < registered_queues; i++)
3657 release_sub_crq_queue(adapter, allqueues[i], 1);
3658 kfree(allqueues);
3659 return -1;
3660}
3661
3662static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3663{
3664 struct device *dev = &adapter->vdev->dev;
3665 union ibmvnic_crq crq;
3666 int max_entries;
3667
3668 if (!retry) {
3669 /* Sub-CRQ entries are 32 byte long */
3670 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3671
3672 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3673 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3674 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3675 return;
3676 }
3677
3678 if (adapter->desired.mtu)
3679 adapter->req_mtu = adapter->desired.mtu;
3680 else
3681 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3682
3683 if (!adapter->desired.tx_entries)
3684 adapter->desired.tx_entries =
3685 adapter->max_tx_entries_per_subcrq;
3686 if (!adapter->desired.rx_entries)
3687 adapter->desired.rx_entries =
3688 adapter->max_rx_add_entries_per_subcrq;
3689
3690 max_entries = IBMVNIC_MAX_LTB_SIZE /
3691 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3692
3693 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3694 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3695 adapter->desired.tx_entries = max_entries;
3696 }
3697
3698 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3699 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3700 adapter->desired.rx_entries = max_entries;
3701 }
3702
3703 if (adapter->desired.tx_entries)
3704 adapter->req_tx_entries_per_subcrq =
3705 adapter->desired.tx_entries;
3706 else
3707 adapter->req_tx_entries_per_subcrq =
3708 adapter->max_tx_entries_per_subcrq;
3709
3710 if (adapter->desired.rx_entries)
3711 adapter->req_rx_add_entries_per_subcrq =
3712 adapter->desired.rx_entries;
3713 else
3714 adapter->req_rx_add_entries_per_subcrq =
3715 adapter->max_rx_add_entries_per_subcrq;
3716
3717 if (adapter->desired.tx_queues)
3718 adapter->req_tx_queues =
3719 adapter->desired.tx_queues;
3720 else
3721 adapter->req_tx_queues =
3722 adapter->opt_tx_comp_sub_queues;
3723
3724 if (adapter->desired.rx_queues)
3725 adapter->req_rx_queues =
3726 adapter->desired.rx_queues;
3727 else
3728 adapter->req_rx_queues =
3729 adapter->opt_rx_comp_queues;
3730
3731 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3732 }
3733
3734 memset(&crq, 0, sizeof(crq));
3735 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3736 crq.request_capability.cmd = REQUEST_CAPABILITY;
3737
3738 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3739 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3740 atomic_inc(&adapter->running_cap_crqs);
3741 ibmvnic_send_crq(adapter, &crq);
3742
3743 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3744 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3745 atomic_inc(&adapter->running_cap_crqs);
3746 ibmvnic_send_crq(adapter, &crq);
3747
3748 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3749 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3750 atomic_inc(&adapter->running_cap_crqs);
3751 ibmvnic_send_crq(adapter, &crq);
3752
3753 crq.request_capability.capability =
3754 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3755 crq.request_capability.number =
3756 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3757 atomic_inc(&adapter->running_cap_crqs);
3758 ibmvnic_send_crq(adapter, &crq);
3759
3760 crq.request_capability.capability =
3761 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3762 crq.request_capability.number =
3763 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3764 atomic_inc(&adapter->running_cap_crqs);
3765 ibmvnic_send_crq(adapter, &crq);
3766
3767 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3768 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3769 atomic_inc(&adapter->running_cap_crqs);
3770 ibmvnic_send_crq(adapter, &crq);
3771
3772 if (adapter->netdev->flags & IFF_PROMISC) {
3773 if (adapter->promisc_supported) {
3774 crq.request_capability.capability =
3775 cpu_to_be16(PROMISC_REQUESTED);
3776 crq.request_capability.number = cpu_to_be64(1);
3777 atomic_inc(&adapter->running_cap_crqs);
3778 ibmvnic_send_crq(adapter, &crq);
3779 }
3780 } else {
3781 crq.request_capability.capability =
3782 cpu_to_be16(PROMISC_REQUESTED);
3783 crq.request_capability.number = cpu_to_be64(0);
3784 atomic_inc(&adapter->running_cap_crqs);
3785 ibmvnic_send_crq(adapter, &crq);
3786 }
3787}
3788
3789static int pending_scrq(struct ibmvnic_adapter *adapter,
3790 struct ibmvnic_sub_crq_queue *scrq)
3791{
3792 union sub_crq *entry = &scrq->msgs[scrq->cur];
3793 int rc;
3794
3795 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP);
3796
3797 /* Ensure that the SCRQ valid flag is loaded prior to loading the
3798 * contents of the SCRQ descriptor
3799 */
3800 dma_rmb();
3801
3802 return rc;
3803}
3804
3805static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3806 struct ibmvnic_sub_crq_queue *scrq)
3807{
3808 union sub_crq *entry;
3809 unsigned long flags;
3810
3811 spin_lock_irqsave(&scrq->lock, flags);
3812 entry = &scrq->msgs[scrq->cur];
3813 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3814 if (++scrq->cur == scrq->size)
3815 scrq->cur = 0;
3816 } else {
3817 entry = NULL;
3818 }
3819 spin_unlock_irqrestore(&scrq->lock, flags);
3820
3821 /* Ensure that the SCRQ valid flag is loaded prior to loading the
3822 * contents of the SCRQ descriptor
3823 */
3824 dma_rmb();
3825
3826 return entry;
3827}
3828
3829static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3830{
3831 struct ibmvnic_crq_queue *queue = &adapter->crq;
3832 union ibmvnic_crq *crq;
3833
3834 crq = &queue->msgs[queue->cur];
3835 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3836 if (++queue->cur == queue->size)
3837 queue->cur = 0;
3838 } else {
3839 crq = NULL;
3840 }
3841
3842 return crq;
3843}
3844
3845static void print_subcrq_error(struct device *dev, int rc, const char *func)
3846{
3847 switch (rc) {
3848 case H_PARAMETER:
3849 dev_warn_ratelimited(dev,
3850 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3851 func, rc);
3852 break;
3853 case H_CLOSED:
3854 dev_warn_ratelimited(dev,
3855 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3856 func, rc);
3857 break;
3858 default:
3859 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3860 break;
3861 }
3862}
3863
3864static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3865 u64 remote_handle, u64 ioba, u64 num_entries)
3866{
3867 unsigned int ua = adapter->vdev->unit_address;
3868 struct device *dev = &adapter->vdev->dev;
3869 int rc;
3870
3871 /* Make sure the hypervisor sees the complete request */
3872 dma_wmb();
3873 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3874 cpu_to_be64(remote_handle),
3875 ioba, num_entries);
3876
3877 if (rc)
3878 print_subcrq_error(dev, rc, __func__);
3879
3880 return rc;
3881}
3882
3883static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3884 union ibmvnic_crq *crq)
3885{
3886 unsigned int ua = adapter->vdev->unit_address;
3887 struct device *dev = &adapter->vdev->dev;
3888 u64 *u64_crq = (u64 *)crq;
3889 int rc;
3890
3891 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3892 (unsigned long)cpu_to_be64(u64_crq[0]),
3893 (unsigned long)cpu_to_be64(u64_crq[1]));
3894
3895 if (!adapter->crq.active &&
3896 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3897 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3898 return -EINVAL;
3899 }
3900
3901 /* Make sure the hypervisor sees the complete request */
3902 dma_wmb();
3903
3904 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3905 cpu_to_be64(u64_crq[0]),
3906 cpu_to_be64(u64_crq[1]));
3907
3908 if (rc) {
3909 if (rc == H_CLOSED) {
3910 dev_warn(dev, "CRQ Queue closed\n");
3911 /* do not reset, report the fail, wait for passive init from server */
3912 }
3913
3914 dev_warn(dev, "Send error (rc=%d)\n", rc);
3915 }
3916
3917 return rc;
3918}
3919
3920static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3921{
3922 struct device *dev = &adapter->vdev->dev;
3923 union ibmvnic_crq crq;
3924 int retries = 100;
3925 int rc;
3926
3927 memset(&crq, 0, sizeof(crq));
3928 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3929 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3930 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3931
3932 do {
3933 rc = ibmvnic_send_crq(adapter, &crq);
3934 if (rc != H_CLOSED)
3935 break;
3936 retries--;
3937 msleep(50);
3938
3939 } while (retries > 0);
3940
3941 if (rc) {
3942 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3943 return rc;
3944 }
3945
3946 return 0;
3947}
3948
3949struct vnic_login_client_data {
3950 u8 type;
3951 __be16 len;
3952 char name[];
3953} __packed;
3954
3955static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3956{
3957 int len;
3958
3959 /* Calculate the amount of buffer space needed for the
3960 * vnic client data in the login buffer. There are four entries,
3961 * OS name, LPAR name, device name, and a null last entry.
3962 */
3963 len = 4 * sizeof(struct vnic_login_client_data);
3964 len += 6; /* "Linux" plus NULL */
3965 len += strlen(utsname()->nodename) + 1;
3966 len += strlen(adapter->netdev->name) + 1;
3967
3968 return len;
3969}
3970
3971static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3972 struct vnic_login_client_data *vlcd)
3973{
3974 const char *os_name = "Linux";
3975 int len;
3976
3977 /* Type 1 - LPAR OS */
3978 vlcd->type = 1;
3979 len = strlen(os_name) + 1;
3980 vlcd->len = cpu_to_be16(len);
3981 strscpy(vlcd->name, os_name, len);
3982 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3983
3984 /* Type 2 - LPAR name */
3985 vlcd->type = 2;
3986 len = strlen(utsname()->nodename) + 1;
3987 vlcd->len = cpu_to_be16(len);
3988 strscpy(vlcd->name, utsname()->nodename, len);
3989 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3990
3991 /* Type 3 - device name */
3992 vlcd->type = 3;
3993 len = strlen(adapter->netdev->name) + 1;
3994 vlcd->len = cpu_to_be16(len);
3995 strscpy(vlcd->name, adapter->netdev->name, len);
3996}
3997
3998static int send_login(struct ibmvnic_adapter *adapter)
3999{
4000 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
4001 struct ibmvnic_login_buffer *login_buffer;
4002 struct device *dev = &adapter->vdev->dev;
4003 struct vnic_login_client_data *vlcd;
4004 dma_addr_t rsp_buffer_token;
4005 dma_addr_t buffer_token;
4006 size_t rsp_buffer_size;
4007 union ibmvnic_crq crq;
4008 int client_data_len;
4009 size_t buffer_size;
4010 __be64 *tx_list_p;
4011 __be64 *rx_list_p;
4012 int rc;
4013 int i;
4014
4015 if (!adapter->tx_scrq || !adapter->rx_scrq) {
4016 netdev_err(adapter->netdev,
4017 "RX or TX queues are not allocated, device login failed\n");
4018 return -1;
4019 }
4020
4021 release_login_buffer(adapter);
4022 release_login_rsp_buffer(adapter);
4023
4024 client_data_len = vnic_client_data_len(adapter);
4025
4026 buffer_size =
4027 sizeof(struct ibmvnic_login_buffer) +
4028 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
4029 client_data_len;
4030
4031 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
4032 if (!login_buffer)
4033 goto buf_alloc_failed;
4034
4035 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
4036 DMA_TO_DEVICE);
4037 if (dma_mapping_error(dev, buffer_token)) {
4038 dev_err(dev, "Couldn't map login buffer\n");
4039 goto buf_map_failed;
4040 }
4041
4042 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
4043 sizeof(u64) * adapter->req_tx_queues +
4044 sizeof(u64) * adapter->req_rx_queues +
4045 sizeof(u64) * adapter->req_rx_queues +
4046 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
4047
4048 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
4049 if (!login_rsp_buffer)
4050 goto buf_rsp_alloc_failed;
4051
4052 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
4053 rsp_buffer_size, DMA_FROM_DEVICE);
4054 if (dma_mapping_error(dev, rsp_buffer_token)) {
4055 dev_err(dev, "Couldn't map login rsp buffer\n");
4056 goto buf_rsp_map_failed;
4057 }
4058
4059 adapter->login_buf = login_buffer;
4060 adapter->login_buf_token = buffer_token;
4061 adapter->login_buf_sz = buffer_size;
4062 adapter->login_rsp_buf = login_rsp_buffer;
4063 adapter->login_rsp_buf_token = rsp_buffer_token;
4064 adapter->login_rsp_buf_sz = rsp_buffer_size;
4065
4066 login_buffer->len = cpu_to_be32(buffer_size);
4067 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
4068 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
4069 login_buffer->off_txcomp_subcrqs =
4070 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
4071 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
4072 login_buffer->off_rxcomp_subcrqs =
4073 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
4074 sizeof(u64) * adapter->req_tx_queues);
4075 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
4076 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
4077
4078 tx_list_p = (__be64 *)((char *)login_buffer +
4079 sizeof(struct ibmvnic_login_buffer));
4080 rx_list_p = (__be64 *)((char *)login_buffer +
4081 sizeof(struct ibmvnic_login_buffer) +
4082 sizeof(u64) * adapter->req_tx_queues);
4083
4084 for (i = 0; i < adapter->req_tx_queues; i++) {
4085 if (adapter->tx_scrq[i]) {
4086 tx_list_p[i] =
4087 cpu_to_be64(adapter->tx_scrq[i]->crq_num);
4088 }
4089 }
4090
4091 for (i = 0; i < adapter->req_rx_queues; i++) {
4092 if (adapter->rx_scrq[i]) {
4093 rx_list_p[i] =
4094 cpu_to_be64(adapter->rx_scrq[i]->crq_num);
4095 }
4096 }
4097
4098 /* Insert vNIC login client data */
4099 vlcd = (struct vnic_login_client_data *)
4100 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
4101 login_buffer->client_data_offset =
4102 cpu_to_be32((char *)vlcd - (char *)login_buffer);
4103 login_buffer->client_data_len = cpu_to_be32(client_data_len);
4104
4105 vnic_add_client_data(adapter, vlcd);
4106
4107 netdev_dbg(adapter->netdev, "Login Buffer:\n");
4108 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
4109 netdev_dbg(adapter->netdev, "%016lx\n",
4110 ((unsigned long *)(adapter->login_buf))[i]);
4111 }
4112
4113 memset(&crq, 0, sizeof(crq));
4114 crq.login.first = IBMVNIC_CRQ_CMD;
4115 crq.login.cmd = LOGIN;
4116 crq.login.ioba = cpu_to_be32(buffer_token);
4117 crq.login.len = cpu_to_be32(buffer_size);
4118
4119 adapter->login_pending = true;
4120 rc = ibmvnic_send_crq(adapter, &crq);
4121 if (rc) {
4122 adapter->login_pending = false;
4123 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
4124 goto buf_rsp_map_failed;
4125 }
4126
4127 return 0;
4128
4129buf_rsp_map_failed:
4130 kfree(login_rsp_buffer);
4131 adapter->login_rsp_buf = NULL;
4132buf_rsp_alloc_failed:
4133 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
4134buf_map_failed:
4135 kfree(login_buffer);
4136 adapter->login_buf = NULL;
4137buf_alloc_failed:
4138 return -1;
4139}
4140
4141static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
4142 u32 len, u8 map_id)
4143{
4144 union ibmvnic_crq crq;
4145
4146 memset(&crq, 0, sizeof(crq));
4147 crq.request_map.first = IBMVNIC_CRQ_CMD;
4148 crq.request_map.cmd = REQUEST_MAP;
4149 crq.request_map.map_id = map_id;
4150 crq.request_map.ioba = cpu_to_be32(addr);
4151 crq.request_map.len = cpu_to_be32(len);
4152 return ibmvnic_send_crq(adapter, &crq);
4153}
4154
4155static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
4156{
4157 union ibmvnic_crq crq;
4158
4159 memset(&crq, 0, sizeof(crq));
4160 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
4161 crq.request_unmap.cmd = REQUEST_UNMAP;
4162 crq.request_unmap.map_id = map_id;
4163 return ibmvnic_send_crq(adapter, &crq);
4164}
4165
4166static void send_query_map(struct ibmvnic_adapter *adapter)
4167{
4168 union ibmvnic_crq crq;
4169
4170 memset(&crq, 0, sizeof(crq));
4171 crq.query_map.first = IBMVNIC_CRQ_CMD;
4172 crq.query_map.cmd = QUERY_MAP;
4173 ibmvnic_send_crq(adapter, &crq);
4174}
4175
4176/* Send a series of CRQs requesting various capabilities of the VNIC server */
4177static void send_query_cap(struct ibmvnic_adapter *adapter)
4178{
4179 union ibmvnic_crq crq;
4180
4181 atomic_set(&adapter->running_cap_crqs, 0);
4182 memset(&crq, 0, sizeof(crq));
4183 crq.query_capability.first = IBMVNIC_CRQ_CMD;
4184 crq.query_capability.cmd = QUERY_CAPABILITY;
4185
4186 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
4187 atomic_inc(&adapter->running_cap_crqs);
4188 ibmvnic_send_crq(adapter, &crq);
4189
4190 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
4191 atomic_inc(&adapter->running_cap_crqs);
4192 ibmvnic_send_crq(adapter, &crq);
4193
4194 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
4195 atomic_inc(&adapter->running_cap_crqs);
4196 ibmvnic_send_crq(adapter, &crq);
4197
4198 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
4199 atomic_inc(&adapter->running_cap_crqs);
4200 ibmvnic_send_crq(adapter, &crq);
4201
4202 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
4203 atomic_inc(&adapter->running_cap_crqs);
4204 ibmvnic_send_crq(adapter, &crq);
4205
4206 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
4207 atomic_inc(&adapter->running_cap_crqs);
4208 ibmvnic_send_crq(adapter, &crq);
4209
4210 crq.query_capability.capability =
4211 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
4212 atomic_inc(&adapter->running_cap_crqs);
4213 ibmvnic_send_crq(adapter, &crq);
4214
4215 crq.query_capability.capability =
4216 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
4217 atomic_inc(&adapter->running_cap_crqs);
4218 ibmvnic_send_crq(adapter, &crq);
4219
4220 crq.query_capability.capability =
4221 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
4222 atomic_inc(&adapter->running_cap_crqs);
4223 ibmvnic_send_crq(adapter, &crq);
4224
4225 crq.query_capability.capability =
4226 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
4227 atomic_inc(&adapter->running_cap_crqs);
4228 ibmvnic_send_crq(adapter, &crq);
4229
4230 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
4231 atomic_inc(&adapter->running_cap_crqs);
4232 ibmvnic_send_crq(adapter, &crq);
4233
4234 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
4235 atomic_inc(&adapter->running_cap_crqs);
4236 ibmvnic_send_crq(adapter, &crq);
4237
4238 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
4239 atomic_inc(&adapter->running_cap_crqs);
4240 ibmvnic_send_crq(adapter, &crq);
4241
4242 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
4243 atomic_inc(&adapter->running_cap_crqs);
4244 ibmvnic_send_crq(adapter, &crq);
4245
4246 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
4247 atomic_inc(&adapter->running_cap_crqs);
4248 ibmvnic_send_crq(adapter, &crq);
4249
4250 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
4251 atomic_inc(&adapter->running_cap_crqs);
4252 ibmvnic_send_crq(adapter, &crq);
4253
4254 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
4255 atomic_inc(&adapter->running_cap_crqs);
4256 ibmvnic_send_crq(adapter, &crq);
4257
4258 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
4259 atomic_inc(&adapter->running_cap_crqs);
4260 ibmvnic_send_crq(adapter, &crq);
4261
4262 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
4263 atomic_inc(&adapter->running_cap_crqs);
4264 ibmvnic_send_crq(adapter, &crq);
4265
4266 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
4267 atomic_inc(&adapter->running_cap_crqs);
4268 ibmvnic_send_crq(adapter, &crq);
4269
4270 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
4271 atomic_inc(&adapter->running_cap_crqs);
4272 ibmvnic_send_crq(adapter, &crq);
4273
4274 crq.query_capability.capability =
4275 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
4276 atomic_inc(&adapter->running_cap_crqs);
4277 ibmvnic_send_crq(adapter, &crq);
4278
4279 crq.query_capability.capability =
4280 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
4281 atomic_inc(&adapter->running_cap_crqs);
4282 ibmvnic_send_crq(adapter, &crq);
4283
4284 crq.query_capability.capability =
4285 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
4286 atomic_inc(&adapter->running_cap_crqs);
4287 ibmvnic_send_crq(adapter, &crq);
4288
4289 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
4290 atomic_inc(&adapter->running_cap_crqs);
4291 ibmvnic_send_crq(adapter, &crq);
4292}
4293
4294static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
4295{
4296 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4297 struct device *dev = &adapter->vdev->dev;
4298 union ibmvnic_crq crq;
4299
4300 adapter->ip_offload_tok =
4301 dma_map_single(dev,
4302 &adapter->ip_offload_buf,
4303 buf_sz,
4304 DMA_FROM_DEVICE);
4305
4306 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4307 if (!firmware_has_feature(FW_FEATURE_CMO))
4308 dev_err(dev, "Couldn't map offload buffer\n");
4309 return;
4310 }
4311
4312 memset(&crq, 0, sizeof(crq));
4313 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4314 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4315 crq.query_ip_offload.len = cpu_to_be32(buf_sz);
4316 crq.query_ip_offload.ioba =
4317 cpu_to_be32(adapter->ip_offload_tok);
4318
4319 ibmvnic_send_crq(adapter, &crq);
4320}
4321
4322static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
4323{
4324 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
4325 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4326 struct device *dev = &adapter->vdev->dev;
4327 netdev_features_t old_hw_features = 0;
4328 union ibmvnic_crq crq;
4329
4330 adapter->ip_offload_ctrl_tok =
4331 dma_map_single(dev,
4332 ctrl_buf,
4333 sizeof(adapter->ip_offload_ctrl),
4334 DMA_TO_DEVICE);
4335
4336 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4337 dev_err(dev, "Couldn't map ip offload control buffer\n");
4338 return;
4339 }
4340
4341 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4342 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4343 ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4344 ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4345 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4346 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4347 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4348 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4349 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4350 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4351
4352 /* large_rx disabled for now, additional features needed */
4353 ctrl_buf->large_rx_ipv4 = 0;
4354 ctrl_buf->large_rx_ipv6 = 0;
4355
4356 if (adapter->state != VNIC_PROBING) {
4357 old_hw_features = adapter->netdev->hw_features;
4358 adapter->netdev->hw_features = 0;
4359 }
4360
4361 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4362
4363 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4364 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4365
4366 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4367 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4368
4369 if ((adapter->netdev->features &
4370 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4371 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4372
4373 if (buf->large_tx_ipv4)
4374 adapter->netdev->hw_features |= NETIF_F_TSO;
4375 if (buf->large_tx_ipv6)
4376 adapter->netdev->hw_features |= NETIF_F_TSO6;
4377
4378 if (adapter->state == VNIC_PROBING) {
4379 adapter->netdev->features |= adapter->netdev->hw_features;
4380 } else if (old_hw_features != adapter->netdev->hw_features) {
4381 netdev_features_t tmp = 0;
4382
4383 /* disable features no longer supported */
4384 adapter->netdev->features &= adapter->netdev->hw_features;
4385 /* turn on features now supported if previously enabled */
4386 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4387 adapter->netdev->hw_features;
4388 adapter->netdev->features |=
4389 tmp & adapter->netdev->wanted_features;
4390 }
4391
4392 memset(&crq, 0, sizeof(crq));
4393 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4394 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4395 crq.control_ip_offload.len =
4396 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4397 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4398 ibmvnic_send_crq(adapter, &crq);
4399}
4400
4401static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4402 struct ibmvnic_adapter *adapter)
4403{
4404 struct device *dev = &adapter->vdev->dev;
4405
4406 if (crq->get_vpd_size_rsp.rc.code) {
4407 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4408 crq->get_vpd_size_rsp.rc.code);
4409 complete(&adapter->fw_done);
4410 return;
4411 }
4412
4413 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4414 complete(&adapter->fw_done);
4415}
4416
4417static void handle_vpd_rsp(union ibmvnic_crq *crq,
4418 struct ibmvnic_adapter *adapter)
4419{
4420 struct device *dev = &adapter->vdev->dev;
4421 unsigned char *substr = NULL;
4422 u8 fw_level_len = 0;
4423
4424 memset(adapter->fw_version, 0, 32);
4425
4426 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4427 DMA_FROM_DEVICE);
4428
4429 if (crq->get_vpd_rsp.rc.code) {
4430 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4431 crq->get_vpd_rsp.rc.code);
4432 goto complete;
4433 }
4434
4435 /* get the position of the firmware version info
4436 * located after the ASCII 'RM' substring in the buffer
4437 */
4438 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4439 if (!substr) {
4440 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4441 goto complete;
4442 }
4443
4444 /* get length of firmware level ASCII substring */
4445 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4446 fw_level_len = *(substr + 2);
4447 } else {
4448 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4449 goto complete;
4450 }
4451
4452 /* copy firmware version string from vpd into adapter */
4453 if ((substr + 3 + fw_level_len) <
4454 (adapter->vpd->buff + adapter->vpd->len)) {
4455 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4456 } else {
4457 dev_info(dev, "FW substr extrapolated VPD buff\n");
4458 }
4459
4460complete:
4461 if (adapter->fw_version[0] == '\0')
4462 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version));
4463 complete(&adapter->fw_done);
4464}
4465
4466static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4467{
4468 struct device *dev = &adapter->vdev->dev;
4469 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4470 int i;
4471
4472 dma_unmap_single(dev, adapter->ip_offload_tok,
4473 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4474
4475 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4476 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4477 netdev_dbg(adapter->netdev, "%016lx\n",
4478 ((unsigned long *)(buf))[i]);
4479
4480 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4481 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4482 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4483 buf->tcp_ipv4_chksum);
4484 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4485 buf->tcp_ipv6_chksum);
4486 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4487 buf->udp_ipv4_chksum);
4488 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4489 buf->udp_ipv6_chksum);
4490 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4491 buf->large_tx_ipv4);
4492 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4493 buf->large_tx_ipv6);
4494 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4495 buf->large_rx_ipv4);
4496 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4497 buf->large_rx_ipv6);
4498 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4499 buf->max_ipv4_header_size);
4500 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4501 buf->max_ipv6_header_size);
4502 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4503 buf->max_tcp_header_size);
4504 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4505 buf->max_udp_header_size);
4506 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4507 buf->max_large_tx_size);
4508 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4509 buf->max_large_rx_size);
4510 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4511 buf->ipv6_extension_header);
4512 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4513 buf->tcp_pseudosum_req);
4514 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4515 buf->num_ipv6_ext_headers);
4516 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4517 buf->off_ipv6_ext_headers);
4518
4519 send_control_ip_offload(adapter);
4520}
4521
4522static const char *ibmvnic_fw_err_cause(u16 cause)
4523{
4524 switch (cause) {
4525 case ADAPTER_PROBLEM:
4526 return "adapter problem";
4527 case BUS_PROBLEM:
4528 return "bus problem";
4529 case FW_PROBLEM:
4530 return "firmware problem";
4531 case DD_PROBLEM:
4532 return "device driver problem";
4533 case EEH_RECOVERY:
4534 return "EEH recovery";
4535 case FW_UPDATED:
4536 return "firmware updated";
4537 case LOW_MEMORY:
4538 return "low Memory";
4539 default:
4540 return "unknown";
4541 }
4542}
4543
4544static void handle_error_indication(union ibmvnic_crq *crq,
4545 struct ibmvnic_adapter *adapter)
4546{
4547 struct device *dev = &adapter->vdev->dev;
4548 u16 cause;
4549
4550 cause = be16_to_cpu(crq->error_indication.error_cause);
4551
4552 dev_warn_ratelimited(dev,
4553 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4554 crq->error_indication.flags
4555 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4556 ibmvnic_fw_err_cause(cause));
4557
4558 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4559 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4560 else
4561 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4562}
4563
4564static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4565 struct ibmvnic_adapter *adapter)
4566{
4567 struct net_device *netdev = adapter->netdev;
4568 struct device *dev = &adapter->vdev->dev;
4569 long rc;
4570
4571 rc = crq->change_mac_addr_rsp.rc.code;
4572 if (rc) {
4573 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4574 goto out;
4575 }
4576 /* crq->change_mac_addr.mac_addr is the requested one
4577 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4578 */
4579 ether_addr_copy(netdev->dev_addr,
4580 &crq->change_mac_addr_rsp.mac_addr[0]);
4581 ether_addr_copy(adapter->mac_addr,
4582 &crq->change_mac_addr_rsp.mac_addr[0]);
4583out:
4584 complete(&adapter->fw_done);
4585 return rc;
4586}
4587
4588static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4589 struct ibmvnic_adapter *adapter)
4590{
4591 struct device *dev = &adapter->vdev->dev;
4592 u64 *req_value;
4593 char *name;
4594
4595 atomic_dec(&adapter->running_cap_crqs);
4596 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4597 case REQ_TX_QUEUES:
4598 req_value = &adapter->req_tx_queues;
4599 name = "tx";
4600 break;
4601 case REQ_RX_QUEUES:
4602 req_value = &adapter->req_rx_queues;
4603 name = "rx";
4604 break;
4605 case REQ_RX_ADD_QUEUES:
4606 req_value = &adapter->req_rx_add_queues;
4607 name = "rx_add";
4608 break;
4609 case REQ_TX_ENTRIES_PER_SUBCRQ:
4610 req_value = &adapter->req_tx_entries_per_subcrq;
4611 name = "tx_entries_per_subcrq";
4612 break;
4613 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4614 req_value = &adapter->req_rx_add_entries_per_subcrq;
4615 name = "rx_add_entries_per_subcrq";
4616 break;
4617 case REQ_MTU:
4618 req_value = &adapter->req_mtu;
4619 name = "mtu";
4620 break;
4621 case PROMISC_REQUESTED:
4622 req_value = &adapter->promisc;
4623 name = "promisc";
4624 break;
4625 default:
4626 dev_err(dev, "Got invalid cap request rsp %d\n",
4627 crq->request_capability.capability);
4628 return;
4629 }
4630
4631 switch (crq->request_capability_rsp.rc.code) {
4632 case SUCCESS:
4633 break;
4634 case PARTIALSUCCESS:
4635 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4636 *req_value,
4637 (long)be64_to_cpu(crq->request_capability_rsp.number),
4638 name);
4639
4640 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4641 REQ_MTU) {
4642 pr_err("mtu of %llu is not supported. Reverting.\n",
4643 *req_value);
4644 *req_value = adapter->fallback.mtu;
4645 } else {
4646 *req_value =
4647 be64_to_cpu(crq->request_capability_rsp.number);
4648 }
4649
4650 send_request_cap(adapter, 1);
4651 return;
4652 default:
4653 dev_err(dev, "Error %d in request cap rsp\n",
4654 crq->request_capability_rsp.rc.code);
4655 return;
4656 }
4657
4658 /* Done receiving requested capabilities, query IP offload support */
4659 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4660 adapter->wait_capability = false;
4661 send_query_ip_offload(adapter);
4662 }
4663}
4664
4665static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4666 struct ibmvnic_adapter *adapter)
4667{
4668 struct device *dev = &adapter->vdev->dev;
4669 struct net_device *netdev = adapter->netdev;
4670 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4671 struct ibmvnic_login_buffer *login = adapter->login_buf;
4672 u64 *tx_handle_array;
4673 u64 *rx_handle_array;
4674 int num_tx_pools;
4675 int num_rx_pools;
4676 u64 *size_array;
4677 int i;
4678
4679 /* CHECK: Test/set of login_pending does not need to be atomic
4680 * because only ibmvnic_tasklet tests/clears this.
4681 */
4682 if (!adapter->login_pending) {
4683 netdev_warn(netdev, "Ignoring unexpected login response\n");
4684 return 0;
4685 }
4686 adapter->login_pending = false;
4687
4688 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4689 DMA_TO_DEVICE);
4690 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4691 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4692
4693 /* If the number of queues requested can't be allocated by the
4694 * server, the login response will return with code 1. We will need
4695 * to resend the login buffer with fewer queues requested.
4696 */
4697 if (login_rsp_crq->generic.rc.code) {
4698 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4699 complete(&adapter->init_done);
4700 return 0;
4701 }
4702
4703 if (adapter->failover_pending) {
4704 adapter->init_done_rc = -EAGAIN;
4705 netdev_dbg(netdev, "Failover pending, ignoring login response\n");
4706 complete(&adapter->init_done);
4707 /* login response buffer will be released on reset */
4708 return 0;
4709 }
4710
4711 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4712
4713 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4714 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4715 netdev_dbg(adapter->netdev, "%016lx\n",
4716 ((unsigned long *)(adapter->login_rsp_buf))[i]);
4717 }
4718
4719 /* Sanity checks */
4720 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4721 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4722 adapter->req_rx_add_queues !=
4723 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4724 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4725 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4726 return -EIO;
4727 }
4728 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4729 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4730 /* variable buffer sizes are not supported, so just read the
4731 * first entry.
4732 */
4733 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4734
4735 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4736 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4737
4738 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4739 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4740 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4741 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4742
4743 for (i = 0; i < num_tx_pools; i++)
4744 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4745
4746 for (i = 0; i < num_rx_pools; i++)
4747 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4748
4749 adapter->num_active_tx_scrqs = num_tx_pools;
4750 adapter->num_active_rx_scrqs = num_rx_pools;
4751 release_login_rsp_buffer(adapter);
4752 release_login_buffer(adapter);
4753 complete(&adapter->init_done);
4754
4755 return 0;
4756}
4757
4758static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4759 struct ibmvnic_adapter *adapter)
4760{
4761 struct device *dev = &adapter->vdev->dev;
4762 long rc;
4763
4764 rc = crq->request_unmap_rsp.rc.code;
4765 if (rc)
4766 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4767}
4768
4769static void handle_query_map_rsp(union ibmvnic_crq *crq,
4770 struct ibmvnic_adapter *adapter)
4771{
4772 struct net_device *netdev = adapter->netdev;
4773 struct device *dev = &adapter->vdev->dev;
4774 long rc;
4775
4776 rc = crq->query_map_rsp.rc.code;
4777 if (rc) {
4778 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4779 return;
4780 }
4781 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4782 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4783 crq->query_map_rsp.free_pages);
4784}
4785
4786static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4787 struct ibmvnic_adapter *adapter)
4788{
4789 struct net_device *netdev = adapter->netdev;
4790 struct device *dev = &adapter->vdev->dev;
4791 long rc;
4792
4793 atomic_dec(&adapter->running_cap_crqs);
4794 netdev_dbg(netdev, "Outstanding queries: %d\n",
4795 atomic_read(&adapter->running_cap_crqs));
4796 rc = crq->query_capability.rc.code;
4797 if (rc) {
4798 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4799 goto out;
4800 }
4801
4802 switch (be16_to_cpu(crq->query_capability.capability)) {
4803 case MIN_TX_QUEUES:
4804 adapter->min_tx_queues =
4805 be64_to_cpu(crq->query_capability.number);
4806 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4807 adapter->min_tx_queues);
4808 break;
4809 case MIN_RX_QUEUES:
4810 adapter->min_rx_queues =
4811 be64_to_cpu(crq->query_capability.number);
4812 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4813 adapter->min_rx_queues);
4814 break;
4815 case MIN_RX_ADD_QUEUES:
4816 adapter->min_rx_add_queues =
4817 be64_to_cpu(crq->query_capability.number);
4818 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4819 adapter->min_rx_add_queues);
4820 break;
4821 case MAX_TX_QUEUES:
4822 adapter->max_tx_queues =
4823 be64_to_cpu(crq->query_capability.number);
4824 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4825 adapter->max_tx_queues);
4826 break;
4827 case MAX_RX_QUEUES:
4828 adapter->max_rx_queues =
4829 be64_to_cpu(crq->query_capability.number);
4830 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4831 adapter->max_rx_queues);
4832 break;
4833 case MAX_RX_ADD_QUEUES:
4834 adapter->max_rx_add_queues =
4835 be64_to_cpu(crq->query_capability.number);
4836 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4837 adapter->max_rx_add_queues);
4838 break;
4839 case MIN_TX_ENTRIES_PER_SUBCRQ:
4840 adapter->min_tx_entries_per_subcrq =
4841 be64_to_cpu(crq->query_capability.number);
4842 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4843 adapter->min_tx_entries_per_subcrq);
4844 break;
4845 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4846 adapter->min_rx_add_entries_per_subcrq =
4847 be64_to_cpu(crq->query_capability.number);
4848 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4849 adapter->min_rx_add_entries_per_subcrq);
4850 break;
4851 case MAX_TX_ENTRIES_PER_SUBCRQ:
4852 adapter->max_tx_entries_per_subcrq =
4853 be64_to_cpu(crq->query_capability.number);
4854 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4855 adapter->max_tx_entries_per_subcrq);
4856 break;
4857 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4858 adapter->max_rx_add_entries_per_subcrq =
4859 be64_to_cpu(crq->query_capability.number);
4860 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4861 adapter->max_rx_add_entries_per_subcrq);
4862 break;
4863 case TCP_IP_OFFLOAD:
4864 adapter->tcp_ip_offload =
4865 be64_to_cpu(crq->query_capability.number);
4866 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4867 adapter->tcp_ip_offload);
4868 break;
4869 case PROMISC_SUPPORTED:
4870 adapter->promisc_supported =
4871 be64_to_cpu(crq->query_capability.number);
4872 netdev_dbg(netdev, "promisc_supported = %lld\n",
4873 adapter->promisc_supported);
4874 break;
4875 case MIN_MTU:
4876 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4877 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4878 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4879 break;
4880 case MAX_MTU:
4881 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4882 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4883 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4884 break;
4885 case MAX_MULTICAST_FILTERS:
4886 adapter->max_multicast_filters =
4887 be64_to_cpu(crq->query_capability.number);
4888 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4889 adapter->max_multicast_filters);
4890 break;
4891 case VLAN_HEADER_INSERTION:
4892 adapter->vlan_header_insertion =
4893 be64_to_cpu(crq->query_capability.number);
4894 if (adapter->vlan_header_insertion)
4895 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4896 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4897 adapter->vlan_header_insertion);
4898 break;
4899 case RX_VLAN_HEADER_INSERTION:
4900 adapter->rx_vlan_header_insertion =
4901 be64_to_cpu(crq->query_capability.number);
4902 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4903 adapter->rx_vlan_header_insertion);
4904 break;
4905 case MAX_TX_SG_ENTRIES:
4906 adapter->max_tx_sg_entries =
4907 be64_to_cpu(crq->query_capability.number);
4908 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4909 adapter->max_tx_sg_entries);
4910 break;
4911 case RX_SG_SUPPORTED:
4912 adapter->rx_sg_supported =
4913 be64_to_cpu(crq->query_capability.number);
4914 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4915 adapter->rx_sg_supported);
4916 break;
4917 case OPT_TX_COMP_SUB_QUEUES:
4918 adapter->opt_tx_comp_sub_queues =
4919 be64_to_cpu(crq->query_capability.number);
4920 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4921 adapter->opt_tx_comp_sub_queues);
4922 break;
4923 case OPT_RX_COMP_QUEUES:
4924 adapter->opt_rx_comp_queues =
4925 be64_to_cpu(crq->query_capability.number);
4926 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4927 adapter->opt_rx_comp_queues);
4928 break;
4929 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4930 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4931 be64_to_cpu(crq->query_capability.number);
4932 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4933 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4934 break;
4935 case OPT_TX_ENTRIES_PER_SUBCRQ:
4936 adapter->opt_tx_entries_per_subcrq =
4937 be64_to_cpu(crq->query_capability.number);
4938 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4939 adapter->opt_tx_entries_per_subcrq);
4940 break;
4941 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4942 adapter->opt_rxba_entries_per_subcrq =
4943 be64_to_cpu(crq->query_capability.number);
4944 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4945 adapter->opt_rxba_entries_per_subcrq);
4946 break;
4947 case TX_RX_DESC_REQ:
4948 adapter->tx_rx_desc_req = crq->query_capability.number;
4949 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4950 adapter->tx_rx_desc_req);
4951 break;
4952
4953 default:
4954 netdev_err(netdev, "Got invalid cap rsp %d\n",
4955 crq->query_capability.capability);
4956 }
4957
4958out:
4959 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4960 adapter->wait_capability = false;
4961 send_request_cap(adapter, 0);
4962 }
4963}
4964
4965static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4966{
4967 union ibmvnic_crq crq;
4968 int rc;
4969
4970 memset(&crq, 0, sizeof(crq));
4971 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4972 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4973
4974 mutex_lock(&adapter->fw_lock);
4975 adapter->fw_done_rc = 0;
4976 reinit_completion(&adapter->fw_done);
4977
4978 rc = ibmvnic_send_crq(adapter, &crq);
4979 if (rc) {
4980 mutex_unlock(&adapter->fw_lock);
4981 return rc;
4982 }
4983
4984 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4985 if (rc) {
4986 mutex_unlock(&adapter->fw_lock);
4987 return rc;
4988 }
4989
4990 mutex_unlock(&adapter->fw_lock);
4991 return adapter->fw_done_rc ? -EIO : 0;
4992}
4993
4994static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4995 struct ibmvnic_adapter *adapter)
4996{
4997 struct net_device *netdev = adapter->netdev;
4998 int rc;
4999 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
5000
5001 rc = crq->query_phys_parms_rsp.rc.code;
5002 if (rc) {
5003 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
5004 return rc;
5005 }
5006 switch (rspeed) {
5007 case IBMVNIC_10MBPS:
5008 adapter->speed = SPEED_10;
5009 break;
5010 case IBMVNIC_100MBPS:
5011 adapter->speed = SPEED_100;
5012 break;
5013 case IBMVNIC_1GBPS:
5014 adapter->speed = SPEED_1000;
5015 break;
5016 case IBMVNIC_10GBPS:
5017 adapter->speed = SPEED_10000;
5018 break;
5019 case IBMVNIC_25GBPS:
5020 adapter->speed = SPEED_25000;
5021 break;
5022 case IBMVNIC_40GBPS:
5023 adapter->speed = SPEED_40000;
5024 break;
5025 case IBMVNIC_50GBPS:
5026 adapter->speed = SPEED_50000;
5027 break;
5028 case IBMVNIC_100GBPS:
5029 adapter->speed = SPEED_100000;
5030 break;
5031 case IBMVNIC_200GBPS:
5032 adapter->speed = SPEED_200000;
5033 break;
5034 default:
5035 if (netif_carrier_ok(netdev))
5036 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
5037 adapter->speed = SPEED_UNKNOWN;
5038 }
5039 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
5040 adapter->duplex = DUPLEX_FULL;
5041 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
5042 adapter->duplex = DUPLEX_HALF;
5043 else
5044 adapter->duplex = DUPLEX_UNKNOWN;
5045
5046 return rc;
5047}
5048
5049static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
5050 struct ibmvnic_adapter *adapter)
5051{
5052 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
5053 struct net_device *netdev = adapter->netdev;
5054 struct device *dev = &adapter->vdev->dev;
5055 u64 *u64_crq = (u64 *)crq;
5056 long rc;
5057
5058 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
5059 (unsigned long)cpu_to_be64(u64_crq[0]),
5060 (unsigned long)cpu_to_be64(u64_crq[1]));
5061 switch (gen_crq->first) {
5062 case IBMVNIC_CRQ_INIT_RSP:
5063 switch (gen_crq->cmd) {
5064 case IBMVNIC_CRQ_INIT:
5065 dev_info(dev, "Partner initialized\n");
5066 adapter->from_passive_init = true;
5067 /* Discard any stale login responses from prev reset.
5068 * CHECK: should we clear even on INIT_COMPLETE?
5069 */
5070 adapter->login_pending = false;
5071
5072 if (!completion_done(&adapter->init_done)) {
5073 complete(&adapter->init_done);
5074 adapter->init_done_rc = -EIO;
5075 }
5076
5077 if (adapter->state == VNIC_DOWN)
5078 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT);
5079 else
5080 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
5081
5082 if (rc && rc != -EBUSY) {
5083 /* We were unable to schedule the failover
5084 * reset either because the adapter was still
5085 * probing (eg: during kexec) or we could not
5086 * allocate memory. Clear the failover_pending
5087 * flag since no one else will. We ignore
5088 * EBUSY because it means either FAILOVER reset
5089 * is already scheduled or the adapter is
5090 * being removed.
5091 */
5092 netdev_err(netdev,
5093 "Error %ld scheduling failover reset\n",
5094 rc);
5095 adapter->failover_pending = false;
5096 }
5097 break;
5098 case IBMVNIC_CRQ_INIT_COMPLETE:
5099 dev_info(dev, "Partner initialization complete\n");
5100 adapter->crq.active = true;
5101 send_version_xchg(adapter);
5102 break;
5103 default:
5104 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
5105 }
5106 return;
5107 case IBMVNIC_CRQ_XPORT_EVENT:
5108 netif_carrier_off(netdev);
5109 adapter->crq.active = false;
5110 /* terminate any thread waiting for a response
5111 * from the device
5112 */
5113 if (!completion_done(&adapter->fw_done)) {
5114 adapter->fw_done_rc = -EIO;
5115 complete(&adapter->fw_done);
5116 }
5117 if (!completion_done(&adapter->stats_done))
5118 complete(&adapter->stats_done);
5119 if (test_bit(0, &adapter->resetting))
5120 adapter->force_reset_recovery = true;
5121 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
5122 dev_info(dev, "Migrated, re-enabling adapter\n");
5123 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
5124 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
5125 dev_info(dev, "Backing device failover detected\n");
5126 adapter->failover_pending = true;
5127 } else {
5128 /* The adapter lost the connection */
5129 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
5130 gen_crq->cmd);
5131 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
5132 }
5133 return;
5134 case IBMVNIC_CRQ_CMD_RSP:
5135 break;
5136 default:
5137 dev_err(dev, "Got an invalid msg type 0x%02x\n",
5138 gen_crq->first);
5139 return;
5140 }
5141
5142 switch (gen_crq->cmd) {
5143 case VERSION_EXCHANGE_RSP:
5144 rc = crq->version_exchange_rsp.rc.code;
5145 if (rc) {
5146 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
5147 break;
5148 }
5149 ibmvnic_version =
5150 be16_to_cpu(crq->version_exchange_rsp.version);
5151 dev_info(dev, "Partner protocol version is %d\n",
5152 ibmvnic_version);
5153 send_query_cap(adapter);
5154 break;
5155 case QUERY_CAPABILITY_RSP:
5156 handle_query_cap_rsp(crq, adapter);
5157 break;
5158 case QUERY_MAP_RSP:
5159 handle_query_map_rsp(crq, adapter);
5160 break;
5161 case REQUEST_MAP_RSP:
5162 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
5163 complete(&adapter->fw_done);
5164 break;
5165 case REQUEST_UNMAP_RSP:
5166 handle_request_unmap_rsp(crq, adapter);
5167 break;
5168 case REQUEST_CAPABILITY_RSP:
5169 handle_request_cap_rsp(crq, adapter);
5170 break;
5171 case LOGIN_RSP:
5172 netdev_dbg(netdev, "Got Login Response\n");
5173 handle_login_rsp(crq, adapter);
5174 break;
5175 case LOGICAL_LINK_STATE_RSP:
5176 netdev_dbg(netdev,
5177 "Got Logical Link State Response, state: %d rc: %d\n",
5178 crq->logical_link_state_rsp.link_state,
5179 crq->logical_link_state_rsp.rc.code);
5180 adapter->logical_link_state =
5181 crq->logical_link_state_rsp.link_state;
5182 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
5183 complete(&adapter->init_done);
5184 break;
5185 case LINK_STATE_INDICATION:
5186 netdev_dbg(netdev, "Got Logical Link State Indication\n");
5187 adapter->phys_link_state =
5188 crq->link_state_indication.phys_link_state;
5189 adapter->logical_link_state =
5190 crq->link_state_indication.logical_link_state;
5191 if (adapter->phys_link_state && adapter->logical_link_state)
5192 netif_carrier_on(netdev);
5193 else
5194 netif_carrier_off(netdev);
5195 break;
5196 case CHANGE_MAC_ADDR_RSP:
5197 netdev_dbg(netdev, "Got MAC address change Response\n");
5198 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
5199 break;
5200 case ERROR_INDICATION:
5201 netdev_dbg(netdev, "Got Error Indication\n");
5202 handle_error_indication(crq, adapter);
5203 break;
5204 case REQUEST_STATISTICS_RSP:
5205 netdev_dbg(netdev, "Got Statistics Response\n");
5206 complete(&adapter->stats_done);
5207 break;
5208 case QUERY_IP_OFFLOAD_RSP:
5209 netdev_dbg(netdev, "Got Query IP offload Response\n");
5210 handle_query_ip_offload_rsp(adapter);
5211 break;
5212 case MULTICAST_CTRL_RSP:
5213 netdev_dbg(netdev, "Got multicast control Response\n");
5214 break;
5215 case CONTROL_IP_OFFLOAD_RSP:
5216 netdev_dbg(netdev, "Got Control IP offload Response\n");
5217 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
5218 sizeof(adapter->ip_offload_ctrl),
5219 DMA_TO_DEVICE);
5220 complete(&adapter->init_done);
5221 break;
5222 case COLLECT_FW_TRACE_RSP:
5223 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
5224 complete(&adapter->fw_done);
5225 break;
5226 case GET_VPD_SIZE_RSP:
5227 handle_vpd_size_rsp(crq, adapter);
5228 break;
5229 case GET_VPD_RSP:
5230 handle_vpd_rsp(crq, adapter);
5231 break;
5232 case QUERY_PHYS_PARMS_RSP:
5233 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
5234 complete(&adapter->fw_done);
5235 break;
5236 default:
5237 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
5238 gen_crq->cmd);
5239 }
5240}
5241
5242static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
5243{
5244 struct ibmvnic_adapter *adapter = instance;
5245
5246 tasklet_schedule(&adapter->tasklet);
5247 return IRQ_HANDLED;
5248}
5249
5250static void ibmvnic_tasklet(struct tasklet_struct *t)
5251{
5252 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
5253 struct ibmvnic_crq_queue *queue = &adapter->crq;
5254 union ibmvnic_crq *crq;
5255 unsigned long flags;
5256 bool done = false;
5257
5258 spin_lock_irqsave(&queue->lock, flags);
5259 while (!done) {
5260 /* Pull all the valid messages off the CRQ */
5261 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
5262 /* This barrier makes sure ibmvnic_next_crq()'s
5263 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
5264 * before ibmvnic_handle_crq()'s
5265 * switch(gen_crq->first) and switch(gen_crq->cmd).
5266 */
5267 dma_rmb();
5268 ibmvnic_handle_crq(crq, adapter);
5269 crq->generic.first = 0;
5270 }
5271
5272 /* remain in tasklet until all
5273 * capabilities responses are received
5274 */
5275 if (!adapter->wait_capability)
5276 done = true;
5277 }
5278 /* if capabilities CRQ's were sent in this tasklet, the following
5279 * tasklet must wait until all responses are received
5280 */
5281 if (atomic_read(&adapter->running_cap_crqs) != 0)
5282 adapter->wait_capability = true;
5283 spin_unlock_irqrestore(&queue->lock, flags);
5284}
5285
5286static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
5287{
5288 struct vio_dev *vdev = adapter->vdev;
5289 int rc;
5290
5291 do {
5292 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
5293 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
5294
5295 if (rc)
5296 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
5297
5298 return rc;
5299}
5300
5301static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
5302{
5303 struct ibmvnic_crq_queue *crq = &adapter->crq;
5304 struct device *dev = &adapter->vdev->dev;
5305 struct vio_dev *vdev = adapter->vdev;
5306 int rc;
5307
5308 /* Close the CRQ */
5309 do {
5310 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5311 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5312
5313 /* Clean out the queue */
5314 if (!crq->msgs)
5315 return -EINVAL;
5316
5317 memset(crq->msgs, 0, PAGE_SIZE);
5318 crq->cur = 0;
5319 crq->active = false;
5320
5321 /* And re-open it again */
5322 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5323 crq->msg_token, PAGE_SIZE);
5324
5325 if (rc == H_CLOSED)
5326 /* Adapter is good, but other end is not ready */
5327 dev_warn(dev, "Partner adapter not ready\n");
5328 else if (rc != 0)
5329 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
5330
5331 return rc;
5332}
5333
5334static void release_crq_queue(struct ibmvnic_adapter *adapter)
5335{
5336 struct ibmvnic_crq_queue *crq = &adapter->crq;
5337 struct vio_dev *vdev = adapter->vdev;
5338 long rc;
5339
5340 if (!crq->msgs)
5341 return;
5342
5343 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
5344 free_irq(vdev->irq, adapter);
5345 tasklet_kill(&adapter->tasklet);
5346 do {
5347 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5348 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5349
5350 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
5351 DMA_BIDIRECTIONAL);
5352 free_page((unsigned long)crq->msgs);
5353 crq->msgs = NULL;
5354 crq->active = false;
5355}
5356
5357static int init_crq_queue(struct ibmvnic_adapter *adapter)
5358{
5359 struct ibmvnic_crq_queue *crq = &adapter->crq;
5360 struct device *dev = &adapter->vdev->dev;
5361 struct vio_dev *vdev = adapter->vdev;
5362 int rc, retrc = -ENOMEM;
5363
5364 if (crq->msgs)
5365 return 0;
5366
5367 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
5368 /* Should we allocate more than one page? */
5369
5370 if (!crq->msgs)
5371 return -ENOMEM;
5372
5373 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
5374 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
5375 DMA_BIDIRECTIONAL);
5376 if (dma_mapping_error(dev, crq->msg_token))
5377 goto map_failed;
5378
5379 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5380 crq->msg_token, PAGE_SIZE);
5381
5382 if (rc == H_RESOURCE)
5383 /* maybe kexecing and resource is busy. try a reset */
5384 rc = ibmvnic_reset_crq(adapter);
5385 retrc = rc;
5386
5387 if (rc == H_CLOSED) {
5388 dev_warn(dev, "Partner adapter not ready\n");
5389 } else if (rc) {
5390 dev_warn(dev, "Error %d opening adapter\n", rc);
5391 goto reg_crq_failed;
5392 }
5393
5394 retrc = 0;
5395
5396 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5397
5398 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5399 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5400 adapter->vdev->unit_address);
5401 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5402 if (rc) {
5403 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5404 vdev->irq, rc);
5405 goto req_irq_failed;
5406 }
5407
5408 rc = vio_enable_interrupts(vdev);
5409 if (rc) {
5410 dev_err(dev, "Error %d enabling interrupts\n", rc);
5411 goto req_irq_failed;
5412 }
5413
5414 crq->cur = 0;
5415 spin_lock_init(&crq->lock);
5416
5417 return retrc;
5418
5419req_irq_failed:
5420 tasklet_kill(&adapter->tasklet);
5421 do {
5422 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5423 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5424reg_crq_failed:
5425 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5426map_failed:
5427 free_page((unsigned long)crq->msgs);
5428 crq->msgs = NULL;
5429 return retrc;
5430}
5431
5432static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5433{
5434 struct device *dev = &adapter->vdev->dev;
5435 unsigned long timeout = msecs_to_jiffies(20000);
5436 u64 old_num_rx_queues = adapter->req_rx_queues;
5437 u64 old_num_tx_queues = adapter->req_tx_queues;
5438 int rc;
5439
5440 adapter->from_passive_init = false;
5441
5442 if (reset)
5443 reinit_completion(&adapter->init_done);
5444
5445 adapter->init_done_rc = 0;
5446 rc = ibmvnic_send_crq_init(adapter);
5447 if (rc) {
5448 dev_err(dev, "Send crq init failed with error %d\n", rc);
5449 return rc;
5450 }
5451
5452 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5453 dev_err(dev, "Initialization sequence timed out\n");
5454 return -1;
5455 }
5456
5457 if (adapter->init_done_rc) {
5458 release_crq_queue(adapter);
5459 return adapter->init_done_rc;
5460 }
5461
5462 if (adapter->from_passive_init) {
5463 adapter->state = VNIC_OPEN;
5464 adapter->from_passive_init = false;
5465 return -1;
5466 }
5467
5468 if (reset &&
5469 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5470 adapter->reset_reason != VNIC_RESET_MOBILITY) {
5471 if (adapter->req_rx_queues != old_num_rx_queues ||
5472 adapter->req_tx_queues != old_num_tx_queues) {
5473 release_sub_crqs(adapter, 0);
5474 rc = init_sub_crqs(adapter);
5475 } else {
5476 rc = reset_sub_crq_queues(adapter);
5477 }
5478 } else {
5479 rc = init_sub_crqs(adapter);
5480 }
5481
5482 if (rc) {
5483 dev_err(dev, "Initialization of sub crqs failed\n");
5484 release_crq_queue(adapter);
5485 return rc;
5486 }
5487
5488 rc = init_sub_crq_irqs(adapter);
5489 if (rc) {
5490 dev_err(dev, "Failed to initialize sub crq irqs\n");
5491 release_crq_queue(adapter);
5492 }
5493
5494 return rc;
5495}
5496
5497static struct device_attribute dev_attr_failover;
5498
5499static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5500{
5501 struct ibmvnic_adapter *adapter;
5502 struct net_device *netdev;
5503 unsigned char *mac_addr_p;
5504 bool init_success;
5505 int rc;
5506
5507 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5508 dev->unit_address);
5509
5510 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5511 VETH_MAC_ADDR, NULL);
5512 if (!mac_addr_p) {
5513 dev_err(&dev->dev,
5514 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5515 __FILE__, __LINE__);
5516 return 0;
5517 }
5518
5519 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5520 IBMVNIC_MAX_QUEUES);
5521 if (!netdev)
5522 return -ENOMEM;
5523
5524 adapter = netdev_priv(netdev);
5525 adapter->state = VNIC_PROBING;
5526 dev_set_drvdata(&dev->dev, netdev);
5527 adapter->vdev = dev;
5528 adapter->netdev = netdev;
5529 adapter->login_pending = false;
5530
5531 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5532 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5533 netdev->irq = dev->irq;
5534 netdev->netdev_ops = &ibmvnic_netdev_ops;
5535 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5536 SET_NETDEV_DEV(netdev, &dev->dev);
5537
5538 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5539 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5540 __ibmvnic_delayed_reset);
5541 INIT_LIST_HEAD(&adapter->rwi_list);
5542 spin_lock_init(&adapter->rwi_lock);
5543 spin_lock_init(&adapter->state_lock);
5544 mutex_init(&adapter->fw_lock);
5545 init_completion(&adapter->init_done);
5546 init_completion(&adapter->fw_done);
5547 init_completion(&adapter->reset_done);
5548 init_completion(&adapter->stats_done);
5549 clear_bit(0, &adapter->resetting);
5550
5551 init_success = false;
5552 do {
5553 rc = init_crq_queue(adapter);
5554 if (rc) {
5555 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5556 rc);
5557 goto ibmvnic_init_fail;
5558 }
5559
5560 rc = ibmvnic_reset_init(adapter, false);
5561 } while (rc == EAGAIN);
5562
5563 /* We are ignoring the error from ibmvnic_reset_init() assuming that the
5564 * partner is not ready. CRQ is not active. When the partner becomes
5565 * ready, we will do the passive init reset.
5566 */
5567
5568 if (!rc)
5569 init_success = true;
5570
5571 rc = init_stats_buffers(adapter);
5572 if (rc)
5573 goto ibmvnic_init_fail;
5574
5575 rc = init_stats_token(adapter);
5576 if (rc)
5577 goto ibmvnic_stats_fail;
5578
5579 rc = device_create_file(&dev->dev, &dev_attr_failover);
5580 if (rc)
5581 goto ibmvnic_dev_file_err;
5582
5583 netif_carrier_off(netdev);
5584 rc = register_netdev(netdev);
5585 if (rc) {
5586 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5587 goto ibmvnic_register_fail;
5588 }
5589 dev_info(&dev->dev, "ibmvnic registered\n");
5590
5591 if (init_success) {
5592 adapter->state = VNIC_PROBED;
5593 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5594 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5595 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5596 } else {
5597 adapter->state = VNIC_DOWN;
5598 }
5599
5600 adapter->wait_for_reset = false;
5601 adapter->last_reset_time = jiffies;
5602 return 0;
5603
5604ibmvnic_register_fail:
5605 device_remove_file(&dev->dev, &dev_attr_failover);
5606
5607ibmvnic_dev_file_err:
5608 release_stats_token(adapter);
5609
5610ibmvnic_stats_fail:
5611 release_stats_buffers(adapter);
5612
5613ibmvnic_init_fail:
5614 release_sub_crqs(adapter, 1);
5615 release_crq_queue(adapter);
5616 mutex_destroy(&adapter->fw_lock);
5617 free_netdev(netdev);
5618
5619 return rc;
5620}
5621
5622static void ibmvnic_remove(struct vio_dev *dev)
5623{
5624 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5625 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5626 unsigned long flags;
5627
5628 spin_lock_irqsave(&adapter->state_lock, flags);
5629
5630 /* If ibmvnic_reset() is scheduling a reset, wait for it to
5631 * finish. Then, set the state to REMOVING to prevent it from
5632 * scheduling any more work and to have reset functions ignore
5633 * any resets that have already been scheduled. Drop the lock
5634 * after setting state, so __ibmvnic_reset() which is called
5635 * from the flush_work() below, can make progress.
5636 */
5637 spin_lock(&adapter->rwi_lock);
5638 adapter->state = VNIC_REMOVING;
5639 spin_unlock(&adapter->rwi_lock);
5640
5641 spin_unlock_irqrestore(&adapter->state_lock, flags);
5642
5643 flush_work(&adapter->ibmvnic_reset);
5644 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5645
5646 rtnl_lock();
5647 unregister_netdevice(netdev);
5648
5649 release_resources(adapter);
5650 release_sub_crqs(adapter, 1);
5651 release_crq_queue(adapter);
5652
5653 release_stats_token(adapter);
5654 release_stats_buffers(adapter);
5655
5656 adapter->state = VNIC_REMOVED;
5657
5658 rtnl_unlock();
5659 mutex_destroy(&adapter->fw_lock);
5660 device_remove_file(&dev->dev, &dev_attr_failover);
5661 free_netdev(netdev);
5662 dev_set_drvdata(&dev->dev, NULL);
5663}
5664
5665static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5666 const char *buf, size_t count)
5667{
5668 struct net_device *netdev = dev_get_drvdata(dev);
5669 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5670 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5671 __be64 session_token;
5672 long rc;
5673
5674 if (!sysfs_streq(buf, "1"))
5675 return -EINVAL;
5676
5677 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5678 H_GET_SESSION_TOKEN, 0, 0, 0);
5679 if (rc) {
5680 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5681 rc);
5682 goto last_resort;
5683 }
5684
5685 session_token = (__be64)retbuf[0];
5686 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5687 be64_to_cpu(session_token));
5688 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5689 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5690 if (rc)
5691 netdev_err(netdev,
5692 "H_VIOCTL initiated failover failed, rc %ld\n",
5693 rc);
5694
5695last_resort:
5696 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n");
5697 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
5698
5699 return count;
5700}
5701static DEVICE_ATTR_WO(failover);
5702
5703static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5704{
5705 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5706 struct ibmvnic_adapter *adapter;
5707 struct iommu_table *tbl;
5708 unsigned long ret = 0;
5709 int i;
5710
5711 tbl = get_iommu_table_base(&vdev->dev);
5712
5713 /* netdev inits at probe time along with the structures we need below*/
5714 if (!netdev)
5715 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5716
5717 adapter = netdev_priv(netdev);
5718
5719 ret += PAGE_SIZE; /* the crq message queue */
5720 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5721
5722 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5723 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5724
5725 for (i = 0; i < adapter->num_active_rx_pools; i++)
5726 ret += adapter->rx_pool[i].size *
5727 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5728
5729 return ret;
5730}
5731
5732static int ibmvnic_resume(struct device *dev)
5733{
5734 struct net_device *netdev = dev_get_drvdata(dev);
5735 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5736
5737 if (adapter->state != VNIC_OPEN)
5738 return 0;
5739
5740 tasklet_schedule(&adapter->tasklet);
5741
5742 return 0;
5743}
5744
5745static const struct vio_device_id ibmvnic_device_table[] = {
5746 {"network", "IBM,vnic"},
5747 {"", "" }
5748};
5749MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5750
5751static const struct dev_pm_ops ibmvnic_pm_ops = {
5752 .resume = ibmvnic_resume
5753};
5754
5755static struct vio_driver ibmvnic_driver = {
5756 .id_table = ibmvnic_device_table,
5757 .probe = ibmvnic_probe,
5758 .remove = ibmvnic_remove,
5759 .get_desired_dma = ibmvnic_get_desired_dma,
5760 .name = ibmvnic_driver_name,
5761 .pm = &ibmvnic_pm_ops,
5762};
5763
5764/* module functions */
5765static int __init ibmvnic_module_init(void)
5766{
5767 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5768 IBMVNIC_DRIVER_VERSION);
5769
5770 return vio_register_driver(&ibmvnic_driver);
5771}
5772
5773static void __exit ibmvnic_module_exit(void)
5774{
5775 vio_unregister_driver(&ibmvnic_driver);
5776}
5777
5778module_init(ibmvnic_module_init);
5779module_exit(ibmvnic_module_exit);