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
72 static const char ibmvnic_driver_name[] = "ibmvnic";
73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
74
75 MODULE_AUTHOR("Santiago Leon");
76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77 MODULE_LICENSE("GPL");
78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
79
80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81 static int ibmvnic_remove(struct vio_dev *);
82 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
88 union sub_crq *sub_crq);
89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
91 static int enable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93 static int disable_scrq_irq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95 static int pending_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
98 struct ibmvnic_sub_crq_queue *);
99 static int ibmvnic_poll(struct napi_struct *napi, int data);
100 static void send_query_map(struct ibmvnic_adapter *adapter);
101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
102 static int send_request_unmap(struct ibmvnic_adapter *, u8);
103 static int send_login(struct ibmvnic_adapter *adapter);
104 static void send_query_cap(struct ibmvnic_adapter *adapter);
105 static int init_sub_crqs(struct ibmvnic_adapter *);
106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
107 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
108 static void release_crq_queue(struct ibmvnic_adapter *);
109 static int __ibmvnic_set_mac(struct net_device *, u8 *);
110 static int init_crq_queue(struct ibmvnic_adapter *adapter);
111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
112
113 struct ibmvnic_stat {
114 char name[ETH_GSTRING_LEN];
115 int offset;
116 };
117
118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
119 offsetof(struct ibmvnic_statistics, stat))
120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
121
122 static const struct ibmvnic_stat ibmvnic_stats[] = {
123 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
124 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
125 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
126 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
127 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
128 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
129 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
130 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
131 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
132 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
133 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
134 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
135 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
136 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
137 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
138 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
139 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
140 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
141 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
142 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
143 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
144 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
145 };
146
h_reg_sub_crq(unsigned long unit_address,unsigned long token,unsigned long length,unsigned long * number,unsigned long * irq)147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
148 unsigned long length, unsigned long *number,
149 unsigned long *irq)
150 {
151 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
152 long rc;
153
154 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
155 *number = retbuf[0];
156 *irq = retbuf[1];
157
158 return rc;
159 }
160
161 /**
162 * ibmvnic_wait_for_completion - Check device state and wait for completion
163 * @adapter: private device data
164 * @comp_done: completion structure to wait for
165 * @timeout: time to wait in milliseconds
166 *
167 * Wait for a completion signal or until the timeout limit is reached
168 * while checking that the device is still active.
169 */
ibmvnic_wait_for_completion(struct ibmvnic_adapter * adapter,struct completion * comp_done,unsigned long timeout)170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
171 struct completion *comp_done,
172 unsigned long timeout)
173 {
174 struct net_device *netdev;
175 unsigned long div_timeout;
176 u8 retry;
177
178 netdev = adapter->netdev;
179 retry = 5;
180 div_timeout = msecs_to_jiffies(timeout / retry);
181 while (true) {
182 if (!adapter->crq.active) {
183 netdev_err(netdev, "Device down!\n");
184 return -ENODEV;
185 }
186 if (!retry--)
187 break;
188 if (wait_for_completion_timeout(comp_done, div_timeout))
189 return 0;
190 }
191 netdev_err(netdev, "Operation timed out.\n");
192 return -ETIMEDOUT;
193 }
194
alloc_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb,int size)195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
196 struct ibmvnic_long_term_buff *ltb, int size)
197 {
198 struct device *dev = &adapter->vdev->dev;
199 int rc;
200
201 ltb->size = size;
202 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
203 GFP_KERNEL);
204
205 if (!ltb->buff) {
206 dev_err(dev, "Couldn't alloc long term buffer\n");
207 return -ENOMEM;
208 }
209 ltb->map_id = adapter->map_id;
210 adapter->map_id++;
211
212 mutex_lock(&adapter->fw_lock);
213 adapter->fw_done_rc = 0;
214 reinit_completion(&adapter->fw_done);
215
216 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
217 if (rc) {
218 dev_err(dev, "send_request_map failed, rc = %d\n", rc);
219 goto out;
220 }
221
222 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
223 if (rc) {
224 dev_err(dev,
225 "Long term map request aborted or timed out,rc = %d\n",
226 rc);
227 goto out;
228 }
229
230 if (adapter->fw_done_rc) {
231 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
232 adapter->fw_done_rc);
233 rc = -1;
234 goto out;
235 }
236 rc = 0;
237 out:
238 if (rc) {
239 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
240 ltb->buff = NULL;
241 }
242 mutex_unlock(&adapter->fw_lock);
243 return rc;
244 }
245
free_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)246 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
247 struct ibmvnic_long_term_buff *ltb)
248 {
249 struct device *dev = &adapter->vdev->dev;
250
251 if (!ltb->buff)
252 return;
253
254 /* VIOS automatically unmaps the long term buffer at remote
255 * end for the following resets:
256 * FAILOVER, MOBILITY, TIMEOUT.
257 */
258 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
259 adapter->reset_reason != VNIC_RESET_MOBILITY &&
260 adapter->reset_reason != VNIC_RESET_TIMEOUT)
261 send_request_unmap(adapter, ltb->map_id);
262 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
263 ltb->buff = NULL;
264 ltb->map_id = 0;
265 }
266
reset_long_term_buff(struct ibmvnic_adapter * adapter,struct ibmvnic_long_term_buff * ltb)267 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
268 struct ibmvnic_long_term_buff *ltb)
269 {
270 struct device *dev = &adapter->vdev->dev;
271 int rc;
272
273 memset(ltb->buff, 0, ltb->size);
274
275 mutex_lock(&adapter->fw_lock);
276 adapter->fw_done_rc = 0;
277
278 reinit_completion(&adapter->fw_done);
279 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
280 if (rc) {
281 mutex_unlock(&adapter->fw_lock);
282 return rc;
283 }
284
285 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
286 if (rc) {
287 dev_info(dev,
288 "Reset failed, long term map request timed out or aborted\n");
289 mutex_unlock(&adapter->fw_lock);
290 return rc;
291 }
292
293 if (adapter->fw_done_rc) {
294 dev_info(dev,
295 "Reset failed, attempting to free and reallocate buffer\n");
296 free_long_term_buff(adapter, ltb);
297 mutex_unlock(&adapter->fw_lock);
298 return alloc_long_term_buff(adapter, ltb, ltb->size);
299 }
300 mutex_unlock(&adapter->fw_lock);
301 return 0;
302 }
303
deactivate_rx_pools(struct ibmvnic_adapter * adapter)304 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
305 {
306 int i;
307
308 for (i = 0; i < adapter->num_active_rx_pools; i++)
309 adapter->rx_pool[i].active = 0;
310 }
311
replenish_rx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_pool * pool)312 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
313 struct ibmvnic_rx_pool *pool)
314 {
315 int count = pool->size - atomic_read(&pool->available);
316 u64 handle = adapter->rx_scrq[pool->index]->handle;
317 struct device *dev = &adapter->vdev->dev;
318 int buffers_added = 0;
319 unsigned long lpar_rc;
320 union sub_crq sub_crq;
321 struct sk_buff *skb;
322 unsigned int offset;
323 dma_addr_t dma_addr;
324 unsigned char *dst;
325 int shift = 0;
326 int index;
327 int i;
328
329 if (!pool->active)
330 return;
331
332 for (i = 0; i < count; ++i) {
333 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
334 if (!skb) {
335 dev_err(dev, "Couldn't replenish rx buff\n");
336 adapter->replenish_no_mem++;
337 break;
338 }
339
340 index = pool->free_map[pool->next_free];
341
342 if (pool->rx_buff[index].skb)
343 dev_err(dev, "Inconsistent free_map!\n");
344
345 /* Copy the skb to the long term mapped DMA buffer */
346 offset = index * pool->buff_size;
347 dst = pool->long_term_buff.buff + offset;
348 memset(dst, 0, pool->buff_size);
349 dma_addr = pool->long_term_buff.addr + offset;
350 pool->rx_buff[index].data = dst;
351
352 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
353 pool->rx_buff[index].dma = dma_addr;
354 pool->rx_buff[index].skb = skb;
355 pool->rx_buff[index].pool_index = pool->index;
356 pool->rx_buff[index].size = pool->buff_size;
357
358 memset(&sub_crq, 0, sizeof(sub_crq));
359 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
360 sub_crq.rx_add.correlator =
361 cpu_to_be64((u64)&pool->rx_buff[index]);
362 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
363 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
364
365 /* The length field of the sCRQ is defined to be 24 bits so the
366 * buffer size needs to be left shifted by a byte before it is
367 * converted to big endian to prevent the last byte from being
368 * truncated.
369 */
370 #ifdef __LITTLE_ENDIAN__
371 shift = 8;
372 #endif
373 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
374
375 lpar_rc = send_subcrq(adapter, handle, &sub_crq);
376 if (lpar_rc != H_SUCCESS)
377 goto failure;
378
379 buffers_added++;
380 adapter->replenish_add_buff_success++;
381 pool->next_free = (pool->next_free + 1) % pool->size;
382 }
383 atomic_add(buffers_added, &pool->available);
384 return;
385
386 failure:
387 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
388 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
389 pool->free_map[pool->next_free] = index;
390 pool->rx_buff[index].skb = NULL;
391
392 dev_kfree_skb_any(skb);
393 adapter->replenish_add_buff_failure++;
394 atomic_add(buffers_added, &pool->available);
395
396 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
397 /* Disable buffer pool replenishment and report carrier off if
398 * queue is closed or pending failover.
399 * Firmware guarantees that a signal will be sent to the
400 * driver, triggering a reset.
401 */
402 deactivate_rx_pools(adapter);
403 netif_carrier_off(adapter->netdev);
404 }
405 }
406
replenish_pools(struct ibmvnic_adapter * adapter)407 static void replenish_pools(struct ibmvnic_adapter *adapter)
408 {
409 int i;
410
411 adapter->replenish_task_cycles++;
412 for (i = 0; i < adapter->num_active_rx_pools; i++) {
413 if (adapter->rx_pool[i].active)
414 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
415 }
416
417 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
418 }
419
release_stats_buffers(struct ibmvnic_adapter * adapter)420 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
421 {
422 kfree(adapter->tx_stats_buffers);
423 kfree(adapter->rx_stats_buffers);
424 adapter->tx_stats_buffers = NULL;
425 adapter->rx_stats_buffers = NULL;
426 }
427
init_stats_buffers(struct ibmvnic_adapter * adapter)428 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
429 {
430 adapter->tx_stats_buffers =
431 kcalloc(IBMVNIC_MAX_QUEUES,
432 sizeof(struct ibmvnic_tx_queue_stats),
433 GFP_KERNEL);
434 if (!adapter->tx_stats_buffers)
435 return -ENOMEM;
436
437 adapter->rx_stats_buffers =
438 kcalloc(IBMVNIC_MAX_QUEUES,
439 sizeof(struct ibmvnic_rx_queue_stats),
440 GFP_KERNEL);
441 if (!adapter->rx_stats_buffers)
442 return -ENOMEM;
443
444 return 0;
445 }
446
release_stats_token(struct ibmvnic_adapter * adapter)447 static void release_stats_token(struct ibmvnic_adapter *adapter)
448 {
449 struct device *dev = &adapter->vdev->dev;
450
451 if (!adapter->stats_token)
452 return;
453
454 dma_unmap_single(dev, adapter->stats_token,
455 sizeof(struct ibmvnic_statistics),
456 DMA_FROM_DEVICE);
457 adapter->stats_token = 0;
458 }
459
init_stats_token(struct ibmvnic_adapter * adapter)460 static int init_stats_token(struct ibmvnic_adapter *adapter)
461 {
462 struct device *dev = &adapter->vdev->dev;
463 dma_addr_t stok;
464
465 stok = dma_map_single(dev, &adapter->stats,
466 sizeof(struct ibmvnic_statistics),
467 DMA_FROM_DEVICE);
468 if (dma_mapping_error(dev, stok)) {
469 dev_err(dev, "Couldn't map stats buffer\n");
470 return -1;
471 }
472
473 adapter->stats_token = stok;
474 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
475 return 0;
476 }
477
reset_rx_pools(struct ibmvnic_adapter * adapter)478 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
479 {
480 struct ibmvnic_rx_pool *rx_pool;
481 u64 buff_size;
482 int rx_scrqs;
483 int i, j, rc;
484
485 if (!adapter->rx_pool)
486 return -1;
487
488 buff_size = adapter->cur_rx_buf_sz;
489 rx_scrqs = adapter->num_active_rx_pools;
490 for (i = 0; i < rx_scrqs; i++) {
491 rx_pool = &adapter->rx_pool[i];
492
493 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
494
495 if (rx_pool->buff_size != buff_size) {
496 free_long_term_buff(adapter, &rx_pool->long_term_buff);
497 rx_pool->buff_size = buff_size;
498 rc = alloc_long_term_buff(adapter,
499 &rx_pool->long_term_buff,
500 rx_pool->size *
501 rx_pool->buff_size);
502 } else {
503 rc = reset_long_term_buff(adapter,
504 &rx_pool->long_term_buff);
505 }
506
507 if (rc)
508 return rc;
509
510 for (j = 0; j < rx_pool->size; j++)
511 rx_pool->free_map[j] = j;
512
513 memset(rx_pool->rx_buff, 0,
514 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
515
516 atomic_set(&rx_pool->available, 0);
517 rx_pool->next_alloc = 0;
518 rx_pool->next_free = 0;
519 rx_pool->active = 1;
520 }
521
522 return 0;
523 }
524
release_rx_pools(struct ibmvnic_adapter * adapter)525 static void release_rx_pools(struct ibmvnic_adapter *adapter)
526 {
527 struct ibmvnic_rx_pool *rx_pool;
528 int i, j;
529
530 if (!adapter->rx_pool)
531 return;
532
533 for (i = 0; i < adapter->num_active_rx_pools; i++) {
534 rx_pool = &adapter->rx_pool[i];
535
536 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
537
538 kfree(rx_pool->free_map);
539 free_long_term_buff(adapter, &rx_pool->long_term_buff);
540
541 if (!rx_pool->rx_buff)
542 continue;
543
544 for (j = 0; j < rx_pool->size; j++) {
545 if (rx_pool->rx_buff[j].skb) {
546 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
547 rx_pool->rx_buff[j].skb = NULL;
548 }
549 }
550
551 kfree(rx_pool->rx_buff);
552 }
553
554 kfree(adapter->rx_pool);
555 adapter->rx_pool = NULL;
556 adapter->num_active_rx_pools = 0;
557 }
558
init_rx_pools(struct net_device * netdev)559 static int init_rx_pools(struct net_device *netdev)
560 {
561 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
562 struct device *dev = &adapter->vdev->dev;
563 struct ibmvnic_rx_pool *rx_pool;
564 int rxadd_subcrqs;
565 u64 buff_size;
566 int i, j;
567
568 rxadd_subcrqs = adapter->num_active_rx_scrqs;
569 buff_size = adapter->cur_rx_buf_sz;
570
571 adapter->rx_pool = kcalloc(rxadd_subcrqs,
572 sizeof(struct ibmvnic_rx_pool),
573 GFP_KERNEL);
574 if (!adapter->rx_pool) {
575 dev_err(dev, "Failed to allocate rx pools\n");
576 return -1;
577 }
578
579 adapter->num_active_rx_pools = rxadd_subcrqs;
580
581 for (i = 0; i < rxadd_subcrqs; i++) {
582 rx_pool = &adapter->rx_pool[i];
583
584 netdev_dbg(adapter->netdev,
585 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
586 i, adapter->req_rx_add_entries_per_subcrq,
587 buff_size);
588
589 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
590 rx_pool->index = i;
591 rx_pool->buff_size = buff_size;
592 rx_pool->active = 1;
593
594 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
595 GFP_KERNEL);
596 if (!rx_pool->free_map) {
597 release_rx_pools(adapter);
598 return -1;
599 }
600
601 rx_pool->rx_buff = kcalloc(rx_pool->size,
602 sizeof(struct ibmvnic_rx_buff),
603 GFP_KERNEL);
604 if (!rx_pool->rx_buff) {
605 dev_err(dev, "Couldn't alloc rx buffers\n");
606 release_rx_pools(adapter);
607 return -1;
608 }
609
610 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
611 rx_pool->size * rx_pool->buff_size)) {
612 release_rx_pools(adapter);
613 return -1;
614 }
615
616 for (j = 0; j < rx_pool->size; ++j)
617 rx_pool->free_map[j] = j;
618
619 atomic_set(&rx_pool->available, 0);
620 rx_pool->next_alloc = 0;
621 rx_pool->next_free = 0;
622 }
623
624 return 0;
625 }
626
reset_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)627 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
628 struct ibmvnic_tx_pool *tx_pool)
629 {
630 int rc, i;
631
632 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
633 if (rc)
634 return rc;
635
636 memset(tx_pool->tx_buff, 0,
637 tx_pool->num_buffers *
638 sizeof(struct ibmvnic_tx_buff));
639
640 for (i = 0; i < tx_pool->num_buffers; i++)
641 tx_pool->free_map[i] = i;
642
643 tx_pool->consumer_index = 0;
644 tx_pool->producer_index = 0;
645
646 return 0;
647 }
648
reset_tx_pools(struct ibmvnic_adapter * adapter)649 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
650 {
651 int tx_scrqs;
652 int i, rc;
653
654 if (!adapter->tx_pool)
655 return -1;
656
657 tx_scrqs = adapter->num_active_tx_pools;
658 for (i = 0; i < tx_scrqs; i++) {
659 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
660 if (rc)
661 return rc;
662 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
663 if (rc)
664 return rc;
665 }
666
667 return 0;
668 }
669
release_vpd_data(struct ibmvnic_adapter * adapter)670 static void release_vpd_data(struct ibmvnic_adapter *adapter)
671 {
672 if (!adapter->vpd)
673 return;
674
675 kfree(adapter->vpd->buff);
676 kfree(adapter->vpd);
677
678 adapter->vpd = NULL;
679 }
680
release_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)681 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
682 struct ibmvnic_tx_pool *tx_pool)
683 {
684 kfree(tx_pool->tx_buff);
685 kfree(tx_pool->free_map);
686 free_long_term_buff(adapter, &tx_pool->long_term_buff);
687 }
688
release_tx_pools(struct ibmvnic_adapter * adapter)689 static void release_tx_pools(struct ibmvnic_adapter *adapter)
690 {
691 int i;
692
693 if (!adapter->tx_pool)
694 return;
695
696 for (i = 0; i < adapter->num_active_tx_pools; i++) {
697 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
698 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
699 }
700
701 kfree(adapter->tx_pool);
702 adapter->tx_pool = NULL;
703 kfree(adapter->tso_pool);
704 adapter->tso_pool = NULL;
705 adapter->num_active_tx_pools = 0;
706 }
707
init_one_tx_pool(struct net_device * netdev,struct ibmvnic_tx_pool * tx_pool,int num_entries,int buf_size)708 static int init_one_tx_pool(struct net_device *netdev,
709 struct ibmvnic_tx_pool *tx_pool,
710 int num_entries, int buf_size)
711 {
712 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
713 int i;
714
715 tx_pool->tx_buff = kcalloc(num_entries,
716 sizeof(struct ibmvnic_tx_buff),
717 GFP_KERNEL);
718 if (!tx_pool->tx_buff)
719 return -1;
720
721 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
722 num_entries * buf_size))
723 return -1;
724
725 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
726 if (!tx_pool->free_map)
727 return -1;
728
729 for (i = 0; i < num_entries; i++)
730 tx_pool->free_map[i] = i;
731
732 tx_pool->consumer_index = 0;
733 tx_pool->producer_index = 0;
734 tx_pool->num_buffers = num_entries;
735 tx_pool->buf_size = buf_size;
736
737 return 0;
738 }
739
init_tx_pools(struct net_device * netdev)740 static int init_tx_pools(struct net_device *netdev)
741 {
742 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
743 int tx_subcrqs;
744 int i, rc;
745
746 tx_subcrqs = adapter->num_active_tx_scrqs;
747 adapter->tx_pool = kcalloc(tx_subcrqs,
748 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
749 if (!adapter->tx_pool)
750 return -1;
751
752 adapter->tso_pool = kcalloc(tx_subcrqs,
753 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
754 if (!adapter->tso_pool) {
755 kfree(adapter->tx_pool);
756 adapter->tx_pool = NULL;
757 return -1;
758 }
759
760 adapter->num_active_tx_pools = tx_subcrqs;
761
762 for (i = 0; i < tx_subcrqs; i++) {
763 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
764 adapter->req_tx_entries_per_subcrq,
765 adapter->req_mtu + VLAN_HLEN);
766 if (rc) {
767 release_tx_pools(adapter);
768 return rc;
769 }
770
771 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
772 IBMVNIC_TSO_BUFS,
773 IBMVNIC_TSO_BUF_SZ);
774 if (rc) {
775 release_tx_pools(adapter);
776 return rc;
777 }
778 }
779
780 return 0;
781 }
782
ibmvnic_napi_enable(struct ibmvnic_adapter * adapter)783 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
784 {
785 int i;
786
787 if (adapter->napi_enabled)
788 return;
789
790 for (i = 0; i < adapter->req_rx_queues; i++)
791 napi_enable(&adapter->napi[i]);
792
793 adapter->napi_enabled = true;
794 }
795
ibmvnic_napi_disable(struct ibmvnic_adapter * adapter)796 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
797 {
798 int i;
799
800 if (!adapter->napi_enabled)
801 return;
802
803 for (i = 0; i < adapter->req_rx_queues; i++) {
804 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
805 napi_disable(&adapter->napi[i]);
806 }
807
808 adapter->napi_enabled = false;
809 }
810
init_napi(struct ibmvnic_adapter * adapter)811 static int init_napi(struct ibmvnic_adapter *adapter)
812 {
813 int i;
814
815 adapter->napi = kcalloc(adapter->req_rx_queues,
816 sizeof(struct napi_struct), GFP_KERNEL);
817 if (!adapter->napi)
818 return -ENOMEM;
819
820 for (i = 0; i < adapter->req_rx_queues; i++) {
821 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
822 netif_napi_add(adapter->netdev, &adapter->napi[i],
823 ibmvnic_poll, NAPI_POLL_WEIGHT);
824 }
825
826 adapter->num_active_rx_napi = adapter->req_rx_queues;
827 return 0;
828 }
829
release_napi(struct ibmvnic_adapter * adapter)830 static void release_napi(struct ibmvnic_adapter *adapter)
831 {
832 int i;
833
834 if (!adapter->napi)
835 return;
836
837 for (i = 0; i < adapter->num_active_rx_napi; i++) {
838 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
839 netif_napi_del(&adapter->napi[i]);
840 }
841
842 kfree(adapter->napi);
843 adapter->napi = NULL;
844 adapter->num_active_rx_napi = 0;
845 adapter->napi_enabled = false;
846 }
847
ibmvnic_login(struct net_device * netdev)848 static int ibmvnic_login(struct net_device *netdev)
849 {
850 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
851 unsigned long timeout = msecs_to_jiffies(20000);
852 int retry_count = 0;
853 int retries = 10;
854 bool retry;
855 int rc;
856
857 do {
858 retry = false;
859 if (retry_count > retries) {
860 netdev_warn(netdev, "Login attempts exceeded\n");
861 return -1;
862 }
863
864 adapter->init_done_rc = 0;
865 reinit_completion(&adapter->init_done);
866 rc = send_login(adapter);
867 if (rc)
868 return rc;
869
870 if (!wait_for_completion_timeout(&adapter->init_done,
871 timeout)) {
872 netdev_warn(netdev, "Login timed out, retrying...\n");
873 retry = true;
874 adapter->init_done_rc = 0;
875 retry_count++;
876 continue;
877 }
878
879 if (adapter->init_done_rc == ABORTED) {
880 netdev_warn(netdev, "Login aborted, retrying...\n");
881 retry = true;
882 adapter->init_done_rc = 0;
883 retry_count++;
884 /* FW or device may be busy, so
885 * wait a bit before retrying login
886 */
887 msleep(500);
888 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
889 retry_count++;
890 release_sub_crqs(adapter, 1);
891
892 retry = true;
893 netdev_dbg(netdev,
894 "Received partial success, retrying...\n");
895 adapter->init_done_rc = 0;
896 reinit_completion(&adapter->init_done);
897 send_query_cap(adapter);
898 if (!wait_for_completion_timeout(&adapter->init_done,
899 timeout)) {
900 netdev_warn(netdev,
901 "Capabilities query timed out\n");
902 return -1;
903 }
904
905 rc = init_sub_crqs(adapter);
906 if (rc) {
907 netdev_warn(netdev,
908 "SCRQ initialization failed\n");
909 return -1;
910 }
911
912 rc = init_sub_crq_irqs(adapter);
913 if (rc) {
914 netdev_warn(netdev,
915 "SCRQ irq initialization failed\n");
916 return -1;
917 }
918 } else if (adapter->init_done_rc) {
919 netdev_warn(netdev, "Adapter login failed\n");
920 return -1;
921 }
922 } while (retry);
923
924 __ibmvnic_set_mac(netdev, adapter->mac_addr);
925
926 netdev_dbg(netdev, "[S:%d] Login succeeded\n", adapter->state);
927 return 0;
928 }
929
release_login_buffer(struct ibmvnic_adapter * adapter)930 static void release_login_buffer(struct ibmvnic_adapter *adapter)
931 {
932 kfree(adapter->login_buf);
933 adapter->login_buf = NULL;
934 }
935
release_login_rsp_buffer(struct ibmvnic_adapter * adapter)936 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
937 {
938 kfree(adapter->login_rsp_buf);
939 adapter->login_rsp_buf = NULL;
940 }
941
release_resources(struct ibmvnic_adapter * adapter)942 static void release_resources(struct ibmvnic_adapter *adapter)
943 {
944 release_vpd_data(adapter);
945
946 release_tx_pools(adapter);
947 release_rx_pools(adapter);
948
949 release_napi(adapter);
950 release_login_buffer(adapter);
951 release_login_rsp_buffer(adapter);
952 }
953
set_link_state(struct ibmvnic_adapter * adapter,u8 link_state)954 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
955 {
956 struct net_device *netdev = adapter->netdev;
957 unsigned long timeout = msecs_to_jiffies(20000);
958 union ibmvnic_crq crq;
959 bool resend;
960 int rc;
961
962 netdev_dbg(netdev, "setting link state %d\n", link_state);
963
964 memset(&crq, 0, sizeof(crq));
965 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
966 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
967 crq.logical_link_state.link_state = link_state;
968
969 do {
970 resend = false;
971
972 reinit_completion(&adapter->init_done);
973 rc = ibmvnic_send_crq(adapter, &crq);
974 if (rc) {
975 netdev_err(netdev, "Failed to set link state\n");
976 return rc;
977 }
978
979 if (!wait_for_completion_timeout(&adapter->init_done,
980 timeout)) {
981 netdev_err(netdev, "timeout setting link state\n");
982 return -1;
983 }
984
985 if (adapter->init_done_rc == PARTIALSUCCESS) {
986 /* Partuial success, delay and re-send */
987 mdelay(1000);
988 resend = true;
989 } else if (adapter->init_done_rc) {
990 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
991 adapter->init_done_rc);
992 return adapter->init_done_rc;
993 }
994 } while (resend);
995
996 return 0;
997 }
998
set_real_num_queues(struct net_device * netdev)999 static int set_real_num_queues(struct net_device *netdev)
1000 {
1001 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1002 int rc;
1003
1004 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
1005 adapter->req_tx_queues, adapter->req_rx_queues);
1006
1007 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1008 if (rc) {
1009 netdev_err(netdev, "failed to set the number of tx queues\n");
1010 return rc;
1011 }
1012
1013 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1014 if (rc)
1015 netdev_err(netdev, "failed to set the number of rx queues\n");
1016
1017 return rc;
1018 }
1019
ibmvnic_get_vpd(struct ibmvnic_adapter * adapter)1020 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1021 {
1022 struct device *dev = &adapter->vdev->dev;
1023 union ibmvnic_crq crq;
1024 int len = 0;
1025 int rc;
1026
1027 if (adapter->vpd->buff)
1028 len = adapter->vpd->len;
1029
1030 mutex_lock(&adapter->fw_lock);
1031 adapter->fw_done_rc = 0;
1032 reinit_completion(&adapter->fw_done);
1033
1034 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1035 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1036 rc = ibmvnic_send_crq(adapter, &crq);
1037 if (rc) {
1038 mutex_unlock(&adapter->fw_lock);
1039 return rc;
1040 }
1041
1042 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1043 if (rc) {
1044 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1045 mutex_unlock(&adapter->fw_lock);
1046 return rc;
1047 }
1048 mutex_unlock(&adapter->fw_lock);
1049
1050 if (!adapter->vpd->len)
1051 return -ENODATA;
1052
1053 if (!adapter->vpd->buff)
1054 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1055 else if (adapter->vpd->len != len)
1056 adapter->vpd->buff =
1057 krealloc(adapter->vpd->buff,
1058 adapter->vpd->len, GFP_KERNEL);
1059
1060 if (!adapter->vpd->buff) {
1061 dev_err(dev, "Could allocate VPD buffer\n");
1062 return -ENOMEM;
1063 }
1064
1065 adapter->vpd->dma_addr =
1066 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1067 DMA_FROM_DEVICE);
1068 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1069 dev_err(dev, "Could not map VPD buffer\n");
1070 kfree(adapter->vpd->buff);
1071 adapter->vpd->buff = NULL;
1072 return -ENOMEM;
1073 }
1074
1075 mutex_lock(&adapter->fw_lock);
1076 adapter->fw_done_rc = 0;
1077 reinit_completion(&adapter->fw_done);
1078
1079 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1080 crq.get_vpd.cmd = GET_VPD;
1081 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1082 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1083 rc = ibmvnic_send_crq(adapter, &crq);
1084 if (rc) {
1085 kfree(adapter->vpd->buff);
1086 adapter->vpd->buff = NULL;
1087 mutex_unlock(&adapter->fw_lock);
1088 return rc;
1089 }
1090
1091 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1092 if (rc) {
1093 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1094 kfree(adapter->vpd->buff);
1095 adapter->vpd->buff = NULL;
1096 mutex_unlock(&adapter->fw_lock);
1097 return rc;
1098 }
1099
1100 mutex_unlock(&adapter->fw_lock);
1101 return 0;
1102 }
1103
init_resources(struct ibmvnic_adapter * adapter)1104 static int init_resources(struct ibmvnic_adapter *adapter)
1105 {
1106 struct net_device *netdev = adapter->netdev;
1107 int rc;
1108
1109 rc = set_real_num_queues(netdev);
1110 if (rc)
1111 return rc;
1112
1113 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1114 if (!adapter->vpd)
1115 return -ENOMEM;
1116
1117 /* Vital Product Data (VPD) */
1118 rc = ibmvnic_get_vpd(adapter);
1119 if (rc) {
1120 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1121 return rc;
1122 }
1123
1124 adapter->map_id = 1;
1125
1126 rc = init_napi(adapter);
1127 if (rc)
1128 return rc;
1129
1130 send_query_map(adapter);
1131
1132 rc = init_rx_pools(netdev);
1133 if (rc)
1134 return rc;
1135
1136 rc = init_tx_pools(netdev);
1137 return rc;
1138 }
1139
__ibmvnic_open(struct net_device * netdev)1140 static int __ibmvnic_open(struct net_device *netdev)
1141 {
1142 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1143 enum vnic_state prev_state = adapter->state;
1144 int i, rc;
1145
1146 adapter->state = VNIC_OPENING;
1147 replenish_pools(adapter);
1148 ibmvnic_napi_enable(adapter);
1149
1150 /* We're ready to receive frames, enable the sub-crq interrupts and
1151 * set the logical link state to up
1152 */
1153 for (i = 0; i < adapter->req_rx_queues; i++) {
1154 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1155 if (prev_state == VNIC_CLOSED)
1156 enable_irq(adapter->rx_scrq[i]->irq);
1157 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1158 }
1159
1160 for (i = 0; i < adapter->req_tx_queues; i++) {
1161 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1162 if (prev_state == VNIC_CLOSED)
1163 enable_irq(adapter->tx_scrq[i]->irq);
1164 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1165 }
1166
1167 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1168 if (rc) {
1169 ibmvnic_napi_disable(adapter);
1170 release_resources(adapter);
1171 return rc;
1172 }
1173
1174 netif_tx_start_all_queues(netdev);
1175
1176 if (prev_state == VNIC_CLOSED) {
1177 for (i = 0; i < adapter->req_rx_queues; i++)
1178 napi_schedule(&adapter->napi[i]);
1179 }
1180
1181 adapter->state = VNIC_OPEN;
1182 return rc;
1183 }
1184
ibmvnic_open(struct net_device * netdev)1185 static int ibmvnic_open(struct net_device *netdev)
1186 {
1187 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1188 int rc;
1189
1190 /* If device failover is pending, just set device state and return.
1191 * Device operation will be handled by reset routine.
1192 */
1193 if (adapter->failover_pending) {
1194 adapter->state = VNIC_OPEN;
1195 return 0;
1196 }
1197
1198 if (adapter->state != VNIC_CLOSED) {
1199 rc = ibmvnic_login(netdev);
1200 if (rc)
1201 goto out;
1202
1203 rc = init_resources(adapter);
1204 if (rc) {
1205 netdev_err(netdev, "failed to initialize resources\n");
1206 release_resources(adapter);
1207 goto out;
1208 }
1209 }
1210
1211 rc = __ibmvnic_open(netdev);
1212
1213 out:
1214 /*
1215 * If open fails due to a pending failover, set device state and
1216 * return. Device operation will be handled by reset routine.
1217 */
1218 if (rc && adapter->failover_pending) {
1219 adapter->state = VNIC_OPEN;
1220 rc = 0;
1221 }
1222 return rc;
1223 }
1224
clean_rx_pools(struct ibmvnic_adapter * adapter)1225 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1226 {
1227 struct ibmvnic_rx_pool *rx_pool;
1228 struct ibmvnic_rx_buff *rx_buff;
1229 u64 rx_entries;
1230 int rx_scrqs;
1231 int i, j;
1232
1233 if (!adapter->rx_pool)
1234 return;
1235
1236 rx_scrqs = adapter->num_active_rx_pools;
1237 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1238
1239 /* Free any remaining skbs in the rx buffer pools */
1240 for (i = 0; i < rx_scrqs; i++) {
1241 rx_pool = &adapter->rx_pool[i];
1242 if (!rx_pool || !rx_pool->rx_buff)
1243 continue;
1244
1245 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1246 for (j = 0; j < rx_entries; j++) {
1247 rx_buff = &rx_pool->rx_buff[j];
1248 if (rx_buff && rx_buff->skb) {
1249 dev_kfree_skb_any(rx_buff->skb);
1250 rx_buff->skb = NULL;
1251 }
1252 }
1253 }
1254 }
1255
clean_one_tx_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_tx_pool * tx_pool)1256 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1257 struct ibmvnic_tx_pool *tx_pool)
1258 {
1259 struct ibmvnic_tx_buff *tx_buff;
1260 u64 tx_entries;
1261 int i;
1262
1263 if (!tx_pool || !tx_pool->tx_buff)
1264 return;
1265
1266 tx_entries = tx_pool->num_buffers;
1267
1268 for (i = 0; i < tx_entries; i++) {
1269 tx_buff = &tx_pool->tx_buff[i];
1270 if (tx_buff && tx_buff->skb) {
1271 dev_kfree_skb_any(tx_buff->skb);
1272 tx_buff->skb = NULL;
1273 }
1274 }
1275 }
1276
clean_tx_pools(struct ibmvnic_adapter * adapter)1277 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1278 {
1279 int tx_scrqs;
1280 int i;
1281
1282 if (!adapter->tx_pool || !adapter->tso_pool)
1283 return;
1284
1285 tx_scrqs = adapter->num_active_tx_pools;
1286
1287 /* Free any remaining skbs in the tx buffer pools */
1288 for (i = 0; i < tx_scrqs; i++) {
1289 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1290 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1291 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1292 }
1293 }
1294
ibmvnic_disable_irqs(struct ibmvnic_adapter * adapter)1295 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1296 {
1297 struct net_device *netdev = adapter->netdev;
1298 int i;
1299
1300 if (adapter->tx_scrq) {
1301 for (i = 0; i < adapter->req_tx_queues; i++)
1302 if (adapter->tx_scrq[i]->irq) {
1303 netdev_dbg(netdev,
1304 "Disabling tx_scrq[%d] irq\n", i);
1305 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1306 disable_irq(adapter->tx_scrq[i]->irq);
1307 }
1308 }
1309
1310 if (adapter->rx_scrq) {
1311 for (i = 0; i < adapter->req_rx_queues; i++) {
1312 if (adapter->rx_scrq[i]->irq) {
1313 netdev_dbg(netdev,
1314 "Disabling rx_scrq[%d] irq\n", i);
1315 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1316 disable_irq(adapter->rx_scrq[i]->irq);
1317 }
1318 }
1319 }
1320 }
1321
ibmvnic_cleanup(struct net_device * netdev)1322 static void ibmvnic_cleanup(struct net_device *netdev)
1323 {
1324 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1325
1326 /* ensure that transmissions are stopped if called by do_reset */
1327 if (test_bit(0, &adapter->resetting))
1328 netif_tx_disable(netdev);
1329 else
1330 netif_tx_stop_all_queues(netdev);
1331
1332 ibmvnic_napi_disable(adapter);
1333 ibmvnic_disable_irqs(adapter);
1334
1335 clean_rx_pools(adapter);
1336 clean_tx_pools(adapter);
1337 }
1338
__ibmvnic_close(struct net_device * netdev)1339 static int __ibmvnic_close(struct net_device *netdev)
1340 {
1341 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1342 int rc = 0;
1343
1344 adapter->state = VNIC_CLOSING;
1345 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1346 adapter->state = VNIC_CLOSED;
1347 return rc;
1348 }
1349
ibmvnic_close(struct net_device * netdev)1350 static int ibmvnic_close(struct net_device *netdev)
1351 {
1352 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1353 int rc;
1354
1355 netdev_dbg(netdev, "[S:%d FOP:%d FRR:%d] Closing\n",
1356 adapter->state, adapter->failover_pending,
1357 adapter->force_reset_recovery);
1358
1359 /* If device failover is pending, just set device state and return.
1360 * Device operation will be handled by reset routine.
1361 */
1362 if (adapter->failover_pending) {
1363 adapter->state = VNIC_CLOSED;
1364 return 0;
1365 }
1366
1367 rc = __ibmvnic_close(netdev);
1368 ibmvnic_cleanup(netdev);
1369
1370 return rc;
1371 }
1372
1373 /**
1374 * build_hdr_data - creates L2/L3/L4 header data buffer
1375 * @hdr_field - bitfield determining needed headers
1376 * @skb - socket buffer
1377 * @hdr_len - array of header lengths
1378 * @tot_len - total length of data
1379 *
1380 * Reads hdr_field to determine which headers are needed by firmware.
1381 * Builds a buffer containing these headers. Saves individual header
1382 * lengths and total buffer length to be used to build descriptors.
1383 */
build_hdr_data(u8 hdr_field,struct sk_buff * skb,int * hdr_len,u8 * hdr_data)1384 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1385 int *hdr_len, u8 *hdr_data)
1386 {
1387 int len = 0;
1388 u8 *hdr;
1389
1390 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1391 hdr_len[0] = sizeof(struct vlan_ethhdr);
1392 else
1393 hdr_len[0] = sizeof(struct ethhdr);
1394
1395 if (skb->protocol == htons(ETH_P_IP)) {
1396 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1397 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1398 hdr_len[2] = tcp_hdrlen(skb);
1399 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1400 hdr_len[2] = sizeof(struct udphdr);
1401 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1402 hdr_len[1] = sizeof(struct ipv6hdr);
1403 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1404 hdr_len[2] = tcp_hdrlen(skb);
1405 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1406 hdr_len[2] = sizeof(struct udphdr);
1407 } else if (skb->protocol == htons(ETH_P_ARP)) {
1408 hdr_len[1] = arp_hdr_len(skb->dev);
1409 hdr_len[2] = 0;
1410 }
1411
1412 memset(hdr_data, 0, 120);
1413 if ((hdr_field >> 6) & 1) {
1414 hdr = skb_mac_header(skb);
1415 memcpy(hdr_data, hdr, hdr_len[0]);
1416 len += hdr_len[0];
1417 }
1418
1419 if ((hdr_field >> 5) & 1) {
1420 hdr = skb_network_header(skb);
1421 memcpy(hdr_data + len, hdr, hdr_len[1]);
1422 len += hdr_len[1];
1423 }
1424
1425 if ((hdr_field >> 4) & 1) {
1426 hdr = skb_transport_header(skb);
1427 memcpy(hdr_data + len, hdr, hdr_len[2]);
1428 len += hdr_len[2];
1429 }
1430 return len;
1431 }
1432
1433 /**
1434 * create_hdr_descs - create header and header extension descriptors
1435 * @hdr_field - bitfield determining needed headers
1436 * @data - buffer containing header data
1437 * @len - length of data buffer
1438 * @hdr_len - array of individual header lengths
1439 * @scrq_arr - descriptor array
1440 *
1441 * Creates header and, if needed, header extension descriptors and
1442 * places them in a descriptor array, scrq_arr
1443 */
1444
create_hdr_descs(u8 hdr_field,u8 * hdr_data,int len,int * hdr_len,union sub_crq * scrq_arr)1445 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1446 union sub_crq *scrq_arr)
1447 {
1448 union sub_crq hdr_desc;
1449 int tmp_len = len;
1450 int num_descs = 0;
1451 u8 *data, *cur;
1452 int tmp;
1453
1454 while (tmp_len > 0) {
1455 cur = hdr_data + len - tmp_len;
1456
1457 memset(&hdr_desc, 0, sizeof(hdr_desc));
1458 if (cur != hdr_data) {
1459 data = hdr_desc.hdr_ext.data;
1460 tmp = tmp_len > 29 ? 29 : tmp_len;
1461 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1462 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1463 hdr_desc.hdr_ext.len = tmp;
1464 } else {
1465 data = hdr_desc.hdr.data;
1466 tmp = tmp_len > 24 ? 24 : tmp_len;
1467 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1468 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1469 hdr_desc.hdr.len = tmp;
1470 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1471 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1472 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1473 hdr_desc.hdr.flag = hdr_field << 1;
1474 }
1475 memcpy(data, cur, tmp);
1476 tmp_len -= tmp;
1477 *scrq_arr = hdr_desc;
1478 scrq_arr++;
1479 num_descs++;
1480 }
1481
1482 return num_descs;
1483 }
1484
1485 /**
1486 * build_hdr_descs_arr - build a header descriptor array
1487 * @skb - socket buffer
1488 * @num_entries - number of descriptors to be sent
1489 * @subcrq - first TX descriptor
1490 * @hdr_field - bit field determining which headers will be sent
1491 *
1492 * This function will build a TX descriptor array with applicable
1493 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1494 */
1495
build_hdr_descs_arr(struct ibmvnic_tx_buff * txbuff,int * num_entries,u8 hdr_field)1496 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1497 int *num_entries, u8 hdr_field)
1498 {
1499 int hdr_len[3] = {0, 0, 0};
1500 int tot_len;
1501 u8 *hdr_data = txbuff->hdr_data;
1502
1503 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1504 txbuff->hdr_data);
1505 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1506 txbuff->indir_arr + 1);
1507 }
1508
ibmvnic_xmit_workarounds(struct sk_buff * skb,struct net_device * netdev)1509 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1510 struct net_device *netdev)
1511 {
1512 /* For some backing devices, mishandling of small packets
1513 * can result in a loss of connection or TX stall. Device
1514 * architects recommend that no packet should be smaller
1515 * than the minimum MTU value provided to the driver, so
1516 * pad any packets to that length
1517 */
1518 if (skb->len < netdev->min_mtu)
1519 return skb_put_padto(skb, netdev->min_mtu);
1520
1521 return 0;
1522 }
1523
ibmvnic_xmit(struct sk_buff * skb,struct net_device * netdev)1524 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1525 {
1526 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1527 int queue_num = skb_get_queue_mapping(skb);
1528 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1529 struct device *dev = &adapter->vdev->dev;
1530 struct ibmvnic_tx_buff *tx_buff = NULL;
1531 struct ibmvnic_sub_crq_queue *tx_scrq;
1532 struct ibmvnic_tx_pool *tx_pool;
1533 unsigned int tx_send_failed = 0;
1534 unsigned int tx_map_failed = 0;
1535 unsigned int tx_dropped = 0;
1536 unsigned int tx_packets = 0;
1537 unsigned int tx_bytes = 0;
1538 dma_addr_t data_dma_addr;
1539 struct netdev_queue *txq;
1540 unsigned long lpar_rc;
1541 union sub_crq tx_crq;
1542 unsigned int offset;
1543 int num_entries = 1;
1544 unsigned char *dst;
1545 int index = 0;
1546 u8 proto = 0;
1547 u64 handle;
1548 netdev_tx_t ret = NETDEV_TX_OK;
1549
1550 if (test_bit(0, &adapter->resetting)) {
1551 dev_kfree_skb_any(skb);
1552
1553 tx_send_failed++;
1554 tx_dropped++;
1555 ret = NETDEV_TX_OK;
1556 goto out;
1557 }
1558
1559 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1560 tx_dropped++;
1561 tx_send_failed++;
1562 ret = NETDEV_TX_OK;
1563 goto out;
1564 }
1565 if (skb_is_gso(skb))
1566 tx_pool = &adapter->tso_pool[queue_num];
1567 else
1568 tx_pool = &adapter->tx_pool[queue_num];
1569
1570 tx_scrq = adapter->tx_scrq[queue_num];
1571 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1572 handle = tx_scrq->handle;
1573
1574 index = tx_pool->free_map[tx_pool->consumer_index];
1575
1576 if (index == IBMVNIC_INVALID_MAP) {
1577 dev_kfree_skb_any(skb);
1578 tx_send_failed++;
1579 tx_dropped++;
1580 ret = NETDEV_TX_OK;
1581 goto out;
1582 }
1583
1584 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1585
1586 offset = index * tx_pool->buf_size;
1587 dst = tx_pool->long_term_buff.buff + offset;
1588 memset(dst, 0, tx_pool->buf_size);
1589 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1590
1591 if (skb_shinfo(skb)->nr_frags) {
1592 int cur, i;
1593
1594 /* Copy the head */
1595 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1596 cur = skb_headlen(skb);
1597
1598 /* Copy the frags */
1599 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1600 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1601
1602 memcpy(dst + cur,
1603 page_address(skb_frag_page(frag)) +
1604 skb_frag_off(frag), skb_frag_size(frag));
1605 cur += skb_frag_size(frag);
1606 }
1607 } else {
1608 skb_copy_from_linear_data(skb, dst, skb->len);
1609 }
1610
1611 /* post changes to long_term_buff *dst before VIOS accessing it */
1612 dma_wmb();
1613
1614 tx_pool->consumer_index =
1615 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1616
1617 tx_buff = &tx_pool->tx_buff[index];
1618 tx_buff->skb = skb;
1619 tx_buff->data_dma[0] = data_dma_addr;
1620 tx_buff->data_len[0] = skb->len;
1621 tx_buff->index = index;
1622 tx_buff->pool_index = queue_num;
1623 tx_buff->last_frag = true;
1624
1625 memset(&tx_crq, 0, sizeof(tx_crq));
1626 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1627 tx_crq.v1.type = IBMVNIC_TX_DESC;
1628 tx_crq.v1.n_crq_elem = 1;
1629 tx_crq.v1.n_sge = 1;
1630 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1631
1632 if (skb_is_gso(skb))
1633 tx_crq.v1.correlator =
1634 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1635 else
1636 tx_crq.v1.correlator = cpu_to_be32(index);
1637 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1638 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1639 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1640
1641 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1642 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1643 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1644 }
1645
1646 if (skb->protocol == htons(ETH_P_IP)) {
1647 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1648 proto = ip_hdr(skb)->protocol;
1649 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1650 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1651 proto = ipv6_hdr(skb)->nexthdr;
1652 }
1653
1654 if (proto == IPPROTO_TCP)
1655 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1656 else if (proto == IPPROTO_UDP)
1657 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1658
1659 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1660 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1661 hdrs += 2;
1662 }
1663 if (skb_is_gso(skb)) {
1664 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1665 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1666 hdrs += 2;
1667 }
1668 /* determine if l2/3/4 headers are sent to firmware */
1669 if ((*hdrs >> 7) & 1) {
1670 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1671 tx_crq.v1.n_crq_elem = num_entries;
1672 tx_buff->num_entries = num_entries;
1673 tx_buff->indir_arr[0] = tx_crq;
1674 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1675 sizeof(tx_buff->indir_arr),
1676 DMA_TO_DEVICE);
1677 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1678 dev_kfree_skb_any(skb);
1679 tx_buff->skb = NULL;
1680 if (!firmware_has_feature(FW_FEATURE_CMO))
1681 dev_err(dev, "tx: unable to map descriptor array\n");
1682 tx_map_failed++;
1683 tx_dropped++;
1684 ret = NETDEV_TX_OK;
1685 goto tx_err_out;
1686 }
1687 lpar_rc = send_subcrq_indirect(adapter, handle,
1688 (u64)tx_buff->indir_dma,
1689 (u64)num_entries);
1690 dma_unmap_single(dev, tx_buff->indir_dma,
1691 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1692 } else {
1693 tx_buff->num_entries = num_entries;
1694 lpar_rc = send_subcrq(adapter, handle,
1695 &tx_crq);
1696 }
1697 if (lpar_rc != H_SUCCESS) {
1698 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1699 dev_err_ratelimited(dev, "tx: send failed\n");
1700 dev_kfree_skb_any(skb);
1701 tx_buff->skb = NULL;
1702
1703 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1704 /* Disable TX and report carrier off if queue is closed
1705 * or pending failover.
1706 * Firmware guarantees that a signal will be sent to the
1707 * driver, triggering a reset or some other action.
1708 */
1709 netif_tx_stop_all_queues(netdev);
1710 netif_carrier_off(netdev);
1711 }
1712
1713 tx_send_failed++;
1714 tx_dropped++;
1715 ret = NETDEV_TX_OK;
1716 goto tx_err_out;
1717 }
1718
1719 if (atomic_add_return(num_entries, &tx_scrq->used)
1720 >= adapter->req_tx_entries_per_subcrq) {
1721 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1722 netif_stop_subqueue(netdev, queue_num);
1723 }
1724
1725 tx_packets++;
1726 tx_bytes += skb->len;
1727 txq->trans_start = jiffies;
1728 ret = NETDEV_TX_OK;
1729 goto out;
1730
1731 tx_err_out:
1732 /* roll back consumer index and map array*/
1733 if (tx_pool->consumer_index == 0)
1734 tx_pool->consumer_index =
1735 tx_pool->num_buffers - 1;
1736 else
1737 tx_pool->consumer_index--;
1738 tx_pool->free_map[tx_pool->consumer_index] = index;
1739 out:
1740 netdev->stats.tx_dropped += tx_dropped;
1741 netdev->stats.tx_bytes += tx_bytes;
1742 netdev->stats.tx_packets += tx_packets;
1743 adapter->tx_send_failed += tx_send_failed;
1744 adapter->tx_map_failed += tx_map_failed;
1745 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1746 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1747 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1748
1749 return ret;
1750 }
1751
ibmvnic_set_multi(struct net_device * netdev)1752 static void ibmvnic_set_multi(struct net_device *netdev)
1753 {
1754 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1755 struct netdev_hw_addr *ha;
1756 union ibmvnic_crq crq;
1757
1758 memset(&crq, 0, sizeof(crq));
1759 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1760 crq.request_capability.cmd = REQUEST_CAPABILITY;
1761
1762 if (netdev->flags & IFF_PROMISC) {
1763 if (!adapter->promisc_supported)
1764 return;
1765 } else {
1766 if (netdev->flags & IFF_ALLMULTI) {
1767 /* Accept all multicast */
1768 memset(&crq, 0, sizeof(crq));
1769 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1770 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1771 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1772 ibmvnic_send_crq(adapter, &crq);
1773 } else if (netdev_mc_empty(netdev)) {
1774 /* Reject all multicast */
1775 memset(&crq, 0, sizeof(crq));
1776 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1777 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1778 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1779 ibmvnic_send_crq(adapter, &crq);
1780 } else {
1781 /* Accept one or more multicast(s) */
1782 netdev_for_each_mc_addr(ha, netdev) {
1783 memset(&crq, 0, sizeof(crq));
1784 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1785 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1786 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1787 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1788 ha->addr);
1789 ibmvnic_send_crq(adapter, &crq);
1790 }
1791 }
1792 }
1793 }
1794
__ibmvnic_set_mac(struct net_device * netdev,u8 * dev_addr)1795 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1796 {
1797 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1798 union ibmvnic_crq crq;
1799 int rc;
1800
1801 if (!is_valid_ether_addr(dev_addr)) {
1802 rc = -EADDRNOTAVAIL;
1803 goto err;
1804 }
1805
1806 memset(&crq, 0, sizeof(crq));
1807 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1808 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1809 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1810
1811 mutex_lock(&adapter->fw_lock);
1812 adapter->fw_done_rc = 0;
1813 reinit_completion(&adapter->fw_done);
1814
1815 rc = ibmvnic_send_crq(adapter, &crq);
1816 if (rc) {
1817 rc = -EIO;
1818 mutex_unlock(&adapter->fw_lock);
1819 goto err;
1820 }
1821
1822 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1823 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1824 if (rc || adapter->fw_done_rc) {
1825 rc = -EIO;
1826 mutex_unlock(&adapter->fw_lock);
1827 goto err;
1828 }
1829 mutex_unlock(&adapter->fw_lock);
1830 return 0;
1831 err:
1832 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1833 return rc;
1834 }
1835
ibmvnic_set_mac(struct net_device * netdev,void * p)1836 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1837 {
1838 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1839 struct sockaddr *addr = p;
1840 int rc;
1841
1842 rc = 0;
1843 if (!is_valid_ether_addr(addr->sa_data))
1844 return -EADDRNOTAVAIL;
1845
1846 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1847 if (adapter->state != VNIC_PROBED)
1848 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1849
1850 return rc;
1851 }
1852
1853 /**
1854 * do_change_param_reset returns zero if we are able to keep processing reset
1855 * events, or non-zero if we hit a fatal error and must halt.
1856 */
do_change_param_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)1857 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1858 struct ibmvnic_rwi *rwi,
1859 u32 reset_state)
1860 {
1861 struct net_device *netdev = adapter->netdev;
1862 int i, rc;
1863
1864 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1865 rwi->reset_reason);
1866
1867 netif_carrier_off(netdev);
1868 adapter->reset_reason = rwi->reset_reason;
1869
1870 ibmvnic_cleanup(netdev);
1871
1872 if (reset_state == VNIC_OPEN) {
1873 rc = __ibmvnic_close(netdev);
1874 if (rc)
1875 goto out;
1876 }
1877
1878 release_resources(adapter);
1879 release_sub_crqs(adapter, 1);
1880 release_crq_queue(adapter);
1881
1882 adapter->state = VNIC_PROBED;
1883
1884 rc = init_crq_queue(adapter);
1885
1886 if (rc) {
1887 netdev_err(adapter->netdev,
1888 "Couldn't initialize crq. rc=%d\n", rc);
1889 return rc;
1890 }
1891
1892 rc = ibmvnic_reset_init(adapter, true);
1893 if (rc) {
1894 rc = IBMVNIC_INIT_FAILED;
1895 goto out;
1896 }
1897
1898 /* If the adapter was in PROBE state prior to the reset,
1899 * exit here.
1900 */
1901 if (reset_state == VNIC_PROBED)
1902 goto out;
1903
1904 rc = ibmvnic_login(netdev);
1905 if (rc) {
1906 goto out;
1907 }
1908
1909 rc = init_resources(adapter);
1910 if (rc)
1911 goto out;
1912
1913 ibmvnic_disable_irqs(adapter);
1914
1915 adapter->state = VNIC_CLOSED;
1916
1917 if (reset_state == VNIC_CLOSED)
1918 return 0;
1919
1920 rc = __ibmvnic_open(netdev);
1921 if (rc) {
1922 rc = IBMVNIC_OPEN_FAILED;
1923 goto out;
1924 }
1925
1926 /* refresh device's multicast list */
1927 ibmvnic_set_multi(netdev);
1928
1929 /* kick napi */
1930 for (i = 0; i < adapter->req_rx_queues; i++)
1931 napi_schedule(&adapter->napi[i]);
1932
1933 out:
1934 if (rc)
1935 adapter->state = reset_state;
1936 return rc;
1937 }
1938
1939 /**
1940 * do_reset returns zero if we are able to keep processing reset events, or
1941 * non-zero if we hit a fatal error and must halt.
1942 */
do_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)1943 static int do_reset(struct ibmvnic_adapter *adapter,
1944 struct ibmvnic_rwi *rwi, u32 reset_state)
1945 {
1946 u64 old_num_rx_queues, old_num_tx_queues;
1947 u64 old_num_rx_slots, old_num_tx_slots;
1948 struct net_device *netdev = adapter->netdev;
1949 int rc;
1950
1951 netdev_dbg(adapter->netdev,
1952 "[S:%d FOP:%d] Reset reason %d, reset_state %d\n",
1953 adapter->state, adapter->failover_pending,
1954 rwi->reset_reason, reset_state);
1955
1956 rtnl_lock();
1957 /*
1958 * Now that we have the rtnl lock, clear any pending failover.
1959 * This will ensure ibmvnic_open() has either completed or will
1960 * block until failover is complete.
1961 */
1962 if (rwi->reset_reason == VNIC_RESET_FAILOVER)
1963 adapter->failover_pending = false;
1964
1965 netif_carrier_off(netdev);
1966 adapter->reset_reason = rwi->reset_reason;
1967
1968 old_num_rx_queues = adapter->req_rx_queues;
1969 old_num_tx_queues = adapter->req_tx_queues;
1970 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1971 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1972
1973 ibmvnic_cleanup(netdev);
1974
1975 if (reset_state == VNIC_OPEN &&
1976 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1977 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1978 adapter->state = VNIC_CLOSING;
1979
1980 /* Release the RTNL lock before link state change and
1981 * re-acquire after the link state change to allow
1982 * linkwatch_event to grab the RTNL lock and run during
1983 * a reset.
1984 */
1985 rtnl_unlock();
1986 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1987 rtnl_lock();
1988 if (rc)
1989 goto out;
1990
1991 if (adapter->state != VNIC_CLOSING) {
1992 rc = -1;
1993 goto out;
1994 }
1995
1996 adapter->state = VNIC_CLOSED;
1997 }
1998
1999 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2000 /* remove the closed state so when we call open it appears
2001 * we are coming from the probed state.
2002 */
2003 adapter->state = VNIC_PROBED;
2004
2005 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
2006 rc = ibmvnic_reenable_crq_queue(adapter);
2007 release_sub_crqs(adapter, 1);
2008 } else {
2009 rc = ibmvnic_reset_crq(adapter);
2010 if (rc == H_CLOSED || rc == H_SUCCESS) {
2011 rc = vio_enable_interrupts(adapter->vdev);
2012 if (rc)
2013 netdev_err(adapter->netdev,
2014 "Reset failed to enable interrupts. rc=%d\n",
2015 rc);
2016 }
2017 }
2018
2019 if (rc) {
2020 netdev_err(adapter->netdev,
2021 "Reset couldn't initialize crq. rc=%d\n", rc);
2022 goto out;
2023 }
2024
2025 rc = ibmvnic_reset_init(adapter, true);
2026 if (rc) {
2027 rc = IBMVNIC_INIT_FAILED;
2028 goto out;
2029 }
2030
2031 /* If the adapter was in PROBE state prior to the reset,
2032 * exit here.
2033 */
2034 if (reset_state == VNIC_PROBED) {
2035 rc = 0;
2036 goto out;
2037 }
2038
2039 rc = ibmvnic_login(netdev);
2040 if (rc) {
2041 goto out;
2042 }
2043
2044 if (adapter->req_rx_queues != old_num_rx_queues ||
2045 adapter->req_tx_queues != old_num_tx_queues ||
2046 adapter->req_rx_add_entries_per_subcrq !=
2047 old_num_rx_slots ||
2048 adapter->req_tx_entries_per_subcrq !=
2049 old_num_tx_slots ||
2050 !adapter->rx_pool ||
2051 !adapter->tso_pool ||
2052 !adapter->tx_pool) {
2053 release_rx_pools(adapter);
2054 release_tx_pools(adapter);
2055 release_napi(adapter);
2056 release_vpd_data(adapter);
2057
2058 rc = init_resources(adapter);
2059 if (rc)
2060 goto out;
2061
2062 } else {
2063 rc = reset_tx_pools(adapter);
2064 if (rc) {
2065 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2066 rc);
2067 goto out;
2068 }
2069
2070 rc = reset_rx_pools(adapter);
2071 if (rc) {
2072 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2073 rc);
2074 goto out;
2075 }
2076 }
2077 ibmvnic_disable_irqs(adapter);
2078 }
2079 adapter->state = VNIC_CLOSED;
2080
2081 if (reset_state == VNIC_CLOSED) {
2082 rc = 0;
2083 goto out;
2084 }
2085
2086 rc = __ibmvnic_open(netdev);
2087 if (rc) {
2088 rc = IBMVNIC_OPEN_FAILED;
2089 goto out;
2090 }
2091
2092 /* refresh device's multicast list */
2093 ibmvnic_set_multi(netdev);
2094
2095 if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
2096 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2097 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2098 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
2099 }
2100
2101 rc = 0;
2102
2103 out:
2104 /* restore the adapter state if reset failed */
2105 if (rc)
2106 adapter->state = reset_state;
2107 rtnl_unlock();
2108
2109 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n",
2110 adapter->state, adapter->failover_pending, rc);
2111 return rc;
2112 }
2113
do_hard_reset(struct ibmvnic_adapter * adapter,struct ibmvnic_rwi * rwi,u32 reset_state)2114 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2115 struct ibmvnic_rwi *rwi, u32 reset_state)
2116 {
2117 struct net_device *netdev = adapter->netdev;
2118 int rc;
2119
2120 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2121 rwi->reset_reason);
2122
2123 netif_carrier_off(netdev);
2124 adapter->reset_reason = rwi->reset_reason;
2125
2126 ibmvnic_cleanup(netdev);
2127 release_resources(adapter);
2128 release_sub_crqs(adapter, 0);
2129 release_crq_queue(adapter);
2130
2131 /* remove the closed state so when we call open it appears
2132 * we are coming from the probed state.
2133 */
2134 adapter->state = VNIC_PROBED;
2135
2136 reinit_completion(&adapter->init_done);
2137 rc = init_crq_queue(adapter);
2138 if (rc) {
2139 netdev_err(adapter->netdev,
2140 "Couldn't initialize crq. rc=%d\n", rc);
2141 goto out;
2142 }
2143
2144 rc = ibmvnic_reset_init(adapter, false);
2145 if (rc)
2146 goto out;
2147
2148 /* If the adapter was in PROBE state prior to the reset,
2149 * exit here.
2150 */
2151 if (reset_state == VNIC_PROBED)
2152 goto out;
2153
2154 rc = ibmvnic_login(netdev);
2155 if (rc)
2156 goto out;
2157
2158 rc = init_resources(adapter);
2159 if (rc)
2160 goto out;
2161
2162 ibmvnic_disable_irqs(adapter);
2163 adapter->state = VNIC_CLOSED;
2164
2165 if (reset_state == VNIC_CLOSED)
2166 goto out;
2167
2168 rc = __ibmvnic_open(netdev);
2169 if (rc) {
2170 rc = IBMVNIC_OPEN_FAILED;
2171 goto out;
2172 }
2173
2174 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2175 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
2176 out:
2177 /* restore adapter state if reset failed */
2178 if (rc)
2179 adapter->state = reset_state;
2180 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n",
2181 adapter->state, adapter->failover_pending, rc);
2182 return rc;
2183 }
2184
get_next_rwi(struct ibmvnic_adapter * adapter)2185 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2186 {
2187 struct ibmvnic_rwi *rwi;
2188 unsigned long flags;
2189
2190 spin_lock_irqsave(&adapter->rwi_lock, flags);
2191
2192 if (!list_empty(&adapter->rwi_list)) {
2193 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2194 list);
2195 list_del(&rwi->list);
2196 } else {
2197 rwi = NULL;
2198 }
2199
2200 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2201 return rwi;
2202 }
2203
__ibmvnic_reset(struct work_struct * work)2204 static void __ibmvnic_reset(struct work_struct *work)
2205 {
2206 struct ibmvnic_rwi *rwi;
2207 struct ibmvnic_adapter *adapter;
2208 bool saved_state = false;
2209 unsigned long flags;
2210 u32 reset_state;
2211 int rc = 0;
2212
2213 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2214
2215 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2216 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2217 IBMVNIC_RESET_DELAY);
2218 return;
2219 }
2220
2221 rwi = get_next_rwi(adapter);
2222 while (rwi) {
2223 spin_lock_irqsave(&adapter->state_lock, flags);
2224
2225 if (adapter->state == VNIC_REMOVING ||
2226 adapter->state == VNIC_REMOVED) {
2227 spin_unlock_irqrestore(&adapter->state_lock, flags);
2228 kfree(rwi);
2229 rc = EBUSY;
2230 break;
2231 }
2232
2233 if (!saved_state) {
2234 reset_state = adapter->state;
2235 saved_state = true;
2236 }
2237 spin_unlock_irqrestore(&adapter->state_lock, flags);
2238
2239 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2240 /* CHANGE_PARAM requestor holds rtnl_lock */
2241 rc = do_change_param_reset(adapter, rwi, reset_state);
2242 } else if (adapter->force_reset_recovery) {
2243 /*
2244 * Since we are doing a hard reset now, clear the
2245 * failover_pending flag so we don't ignore any
2246 * future MOBILITY or other resets.
2247 */
2248 adapter->failover_pending = false;
2249
2250 /* Transport event occurred during previous reset */
2251 if (adapter->wait_for_reset) {
2252 /* Previous was CHANGE_PARAM; caller locked */
2253 adapter->force_reset_recovery = false;
2254 rc = do_hard_reset(adapter, rwi, reset_state);
2255 } else {
2256 rtnl_lock();
2257 adapter->force_reset_recovery = false;
2258 rc = do_hard_reset(adapter, rwi, reset_state);
2259 rtnl_unlock();
2260 }
2261 if (rc) {
2262 /* give backing device time to settle down */
2263 netdev_dbg(adapter->netdev,
2264 "[S:%d] Hard reset failed, waiting 60 secs\n",
2265 adapter->state);
2266 set_current_state(TASK_UNINTERRUPTIBLE);
2267 schedule_timeout(60 * HZ);
2268 }
2269 } else {
2270 rc = do_reset(adapter, rwi, reset_state);
2271 }
2272 kfree(rwi);
2273 adapter->last_reset_time = jiffies;
2274
2275 if (rc)
2276 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
2277
2278 rwi = get_next_rwi(adapter);
2279
2280 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2281 rwi->reset_reason == VNIC_RESET_MOBILITY))
2282 adapter->force_reset_recovery = true;
2283 }
2284
2285 if (adapter->wait_for_reset) {
2286 adapter->reset_done_rc = rc;
2287 complete(&adapter->reset_done);
2288 }
2289
2290 clear_bit_unlock(0, &adapter->resetting);
2291
2292 netdev_dbg(adapter->netdev,
2293 "[S:%d FRR:%d WFR:%d] Done processing resets\n",
2294 adapter->state, adapter->force_reset_recovery,
2295 adapter->wait_for_reset);
2296 }
2297
__ibmvnic_delayed_reset(struct work_struct * work)2298 static void __ibmvnic_delayed_reset(struct work_struct *work)
2299 {
2300 struct ibmvnic_adapter *adapter;
2301
2302 adapter = container_of(work, struct ibmvnic_adapter,
2303 ibmvnic_delayed_reset.work);
2304 __ibmvnic_reset(&adapter->ibmvnic_reset);
2305 }
2306
ibmvnic_reset(struct ibmvnic_adapter * adapter,enum ibmvnic_reset_reason reason)2307 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2308 enum ibmvnic_reset_reason reason)
2309 {
2310 struct list_head *entry, *tmp_entry;
2311 struct ibmvnic_rwi *rwi, *tmp;
2312 struct net_device *netdev = adapter->netdev;
2313 unsigned long flags;
2314 int ret;
2315
2316 spin_lock_irqsave(&adapter->rwi_lock, flags);
2317
2318 /*
2319 * If failover is pending don't schedule any other reset.
2320 * Instead let the failover complete. If there is already a
2321 * a failover reset scheduled, we will detect and drop the
2322 * duplicate reset when walking the ->rwi_list below.
2323 */
2324 if (adapter->state == VNIC_REMOVING ||
2325 adapter->state == VNIC_REMOVED ||
2326 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
2327 ret = EBUSY;
2328 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2329 goto err;
2330 }
2331
2332 if (adapter->state == VNIC_PROBING) {
2333 netdev_warn(netdev, "Adapter reset during probe\n");
2334 ret = adapter->init_done_rc = EAGAIN;
2335 goto err;
2336 }
2337
2338 list_for_each(entry, &adapter->rwi_list) {
2339 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2340 if (tmp->reset_reason == reason) {
2341 netdev_dbg(netdev, "Skipping matching reset, reason=%d\n",
2342 reason);
2343 ret = EBUSY;
2344 goto err;
2345 }
2346 }
2347
2348 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2349 if (!rwi) {
2350 ret = ENOMEM;
2351 goto err;
2352 }
2353 /* if we just received a transport event,
2354 * flush reset queue and process this reset
2355 */
2356 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2357 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2358 list_del(entry);
2359 }
2360 rwi->reset_reason = reason;
2361 list_add_tail(&rwi->list, &adapter->rwi_list);
2362 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2363 schedule_work(&adapter->ibmvnic_reset);
2364
2365 ret = 0;
2366 err:
2367 /* ibmvnic_close() below can block, so drop the lock first */
2368 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2369
2370 if (ret == ENOMEM)
2371 ibmvnic_close(netdev);
2372
2373 return -ret;
2374 }
2375
ibmvnic_tx_timeout(struct net_device * dev,unsigned int txqueue)2376 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2377 {
2378 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2379
2380 if (test_bit(0, &adapter->resetting)) {
2381 netdev_err(adapter->netdev,
2382 "Adapter is resetting, skip timeout reset\n");
2383 return;
2384 }
2385 /* No queuing up reset until at least 5 seconds (default watchdog val)
2386 * after last reset
2387 */
2388 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
2389 netdev_dbg(dev, "Not yet time to tx timeout.\n");
2390 return;
2391 }
2392 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2393 }
2394
remove_buff_from_pool(struct ibmvnic_adapter * adapter,struct ibmvnic_rx_buff * rx_buff)2395 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2396 struct ibmvnic_rx_buff *rx_buff)
2397 {
2398 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2399
2400 rx_buff->skb = NULL;
2401
2402 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2403 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2404
2405 atomic_dec(&pool->available);
2406 }
2407
ibmvnic_poll(struct napi_struct * napi,int budget)2408 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2409 {
2410 struct net_device *netdev = napi->dev;
2411 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2412 int scrq_num = (int)(napi - adapter->napi);
2413 int frames_processed = 0;
2414
2415 restart_poll:
2416 while (frames_processed < budget) {
2417 struct sk_buff *skb;
2418 struct ibmvnic_rx_buff *rx_buff;
2419 union sub_crq *next;
2420 u32 length;
2421 u16 offset;
2422 u8 flags = 0;
2423
2424 if (unlikely(test_bit(0, &adapter->resetting) &&
2425 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2426 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2427 napi_complete_done(napi, frames_processed);
2428 return frames_processed;
2429 }
2430
2431 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2432 break;
2433 /* The queue entry at the current index is peeked at above
2434 * to determine that there is a valid descriptor awaiting
2435 * processing. We want to be sure that the current slot
2436 * holds a valid descriptor before reading its contents.
2437 */
2438 dma_rmb();
2439 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2440 rx_buff =
2441 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2442 rx_comp.correlator);
2443 /* do error checking */
2444 if (next->rx_comp.rc) {
2445 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2446 be16_to_cpu(next->rx_comp.rc));
2447 /* free the entry */
2448 next->rx_comp.first = 0;
2449 dev_kfree_skb_any(rx_buff->skb);
2450 remove_buff_from_pool(adapter, rx_buff);
2451 continue;
2452 } else if (!rx_buff->skb) {
2453 /* free the entry */
2454 next->rx_comp.first = 0;
2455 remove_buff_from_pool(adapter, rx_buff);
2456 continue;
2457 }
2458
2459 length = be32_to_cpu(next->rx_comp.len);
2460 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2461 flags = next->rx_comp.flags;
2462 skb = rx_buff->skb;
2463 /* load long_term_buff before copying to skb */
2464 dma_rmb();
2465 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2466 length);
2467
2468 /* VLAN Header has been stripped by the system firmware and
2469 * needs to be inserted by the driver
2470 */
2471 if (adapter->rx_vlan_header_insertion &&
2472 (flags & IBMVNIC_VLAN_STRIPPED))
2473 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2474 ntohs(next->rx_comp.vlan_tci));
2475
2476 /* free the entry */
2477 next->rx_comp.first = 0;
2478 remove_buff_from_pool(adapter, rx_buff);
2479
2480 skb_put(skb, length);
2481 skb->protocol = eth_type_trans(skb, netdev);
2482 skb_record_rx_queue(skb, scrq_num);
2483
2484 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2485 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2486 skb->ip_summed = CHECKSUM_UNNECESSARY;
2487 }
2488
2489 length = skb->len;
2490 napi_gro_receive(napi, skb); /* send it up */
2491 netdev->stats.rx_packets++;
2492 netdev->stats.rx_bytes += length;
2493 adapter->rx_stats_buffers[scrq_num].packets++;
2494 adapter->rx_stats_buffers[scrq_num].bytes += length;
2495 frames_processed++;
2496 }
2497
2498 if (adapter->state != VNIC_CLOSING)
2499 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2500
2501 if (frames_processed < budget) {
2502 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2503 napi_complete_done(napi, frames_processed);
2504 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2505 napi_reschedule(napi)) {
2506 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2507 goto restart_poll;
2508 }
2509 }
2510 return frames_processed;
2511 }
2512
wait_for_reset(struct ibmvnic_adapter * adapter)2513 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2514 {
2515 int rc, ret;
2516
2517 adapter->fallback.mtu = adapter->req_mtu;
2518 adapter->fallback.rx_queues = adapter->req_rx_queues;
2519 adapter->fallback.tx_queues = adapter->req_tx_queues;
2520 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2521 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2522
2523 reinit_completion(&adapter->reset_done);
2524 adapter->wait_for_reset = true;
2525 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2526
2527 if (rc) {
2528 ret = rc;
2529 goto out;
2530 }
2531 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2532 if (rc) {
2533 ret = -ENODEV;
2534 goto out;
2535 }
2536
2537 ret = 0;
2538 if (adapter->reset_done_rc) {
2539 ret = -EIO;
2540 adapter->desired.mtu = adapter->fallback.mtu;
2541 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2542 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2543 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2544 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2545
2546 reinit_completion(&adapter->reset_done);
2547 adapter->wait_for_reset = true;
2548 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2549 if (rc) {
2550 ret = rc;
2551 goto out;
2552 }
2553 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2554 60000);
2555 if (rc) {
2556 ret = -ENODEV;
2557 goto out;
2558 }
2559 }
2560 out:
2561 adapter->wait_for_reset = false;
2562
2563 return ret;
2564 }
2565
ibmvnic_change_mtu(struct net_device * netdev,int new_mtu)2566 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2567 {
2568 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2569
2570 adapter->desired.mtu = new_mtu + ETH_HLEN;
2571
2572 return wait_for_reset(adapter);
2573 }
2574
ibmvnic_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)2575 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2576 struct net_device *dev,
2577 netdev_features_t features)
2578 {
2579 /* Some backing hardware adapters can not
2580 * handle packets with a MSS less than 224
2581 * or with only one segment.
2582 */
2583 if (skb_is_gso(skb)) {
2584 if (skb_shinfo(skb)->gso_size < 224 ||
2585 skb_shinfo(skb)->gso_segs == 1)
2586 features &= ~NETIF_F_GSO_MASK;
2587 }
2588
2589 return features;
2590 }
2591
2592 static const struct net_device_ops ibmvnic_netdev_ops = {
2593 .ndo_open = ibmvnic_open,
2594 .ndo_stop = ibmvnic_close,
2595 .ndo_start_xmit = ibmvnic_xmit,
2596 .ndo_set_rx_mode = ibmvnic_set_multi,
2597 .ndo_set_mac_address = ibmvnic_set_mac,
2598 .ndo_validate_addr = eth_validate_addr,
2599 .ndo_tx_timeout = ibmvnic_tx_timeout,
2600 .ndo_change_mtu = ibmvnic_change_mtu,
2601 .ndo_features_check = ibmvnic_features_check,
2602 };
2603
2604 /* ethtool functions */
2605
ibmvnic_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)2606 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2607 struct ethtool_link_ksettings *cmd)
2608 {
2609 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2610 int rc;
2611
2612 rc = send_query_phys_parms(adapter);
2613 if (rc) {
2614 adapter->speed = SPEED_UNKNOWN;
2615 adapter->duplex = DUPLEX_UNKNOWN;
2616 }
2617 cmd->base.speed = adapter->speed;
2618 cmd->base.duplex = adapter->duplex;
2619 cmd->base.port = PORT_FIBRE;
2620 cmd->base.phy_address = 0;
2621 cmd->base.autoneg = AUTONEG_ENABLE;
2622
2623 return 0;
2624 }
2625
ibmvnic_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)2626 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2627 struct ethtool_drvinfo *info)
2628 {
2629 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2630
2631 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2632 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2633 strlcpy(info->fw_version, adapter->fw_version,
2634 sizeof(info->fw_version));
2635 }
2636
ibmvnic_get_msglevel(struct net_device * netdev)2637 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2638 {
2639 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2640
2641 return adapter->msg_enable;
2642 }
2643
ibmvnic_set_msglevel(struct net_device * netdev,u32 data)2644 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2645 {
2646 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2647
2648 adapter->msg_enable = data;
2649 }
2650
ibmvnic_get_link(struct net_device * netdev)2651 static u32 ibmvnic_get_link(struct net_device *netdev)
2652 {
2653 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2654
2655 /* Don't need to send a query because we request a logical link up at
2656 * init and then we wait for link state indications
2657 */
2658 return adapter->logical_link_state;
2659 }
2660
ibmvnic_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)2661 static void ibmvnic_get_ringparam(struct net_device *netdev,
2662 struct ethtool_ringparam *ring)
2663 {
2664 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2665
2666 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2667 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2668 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2669 } else {
2670 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2671 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2672 }
2673 ring->rx_mini_max_pending = 0;
2674 ring->rx_jumbo_max_pending = 0;
2675 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2676 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2677 ring->rx_mini_pending = 0;
2678 ring->rx_jumbo_pending = 0;
2679 }
2680
ibmvnic_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring)2681 static int ibmvnic_set_ringparam(struct net_device *netdev,
2682 struct ethtool_ringparam *ring)
2683 {
2684 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2685 int ret;
2686
2687 ret = 0;
2688 adapter->desired.rx_entries = ring->rx_pending;
2689 adapter->desired.tx_entries = ring->tx_pending;
2690
2691 ret = wait_for_reset(adapter);
2692
2693 if (!ret &&
2694 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2695 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2696 netdev_info(netdev,
2697 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2698 ring->rx_pending, ring->tx_pending,
2699 adapter->req_rx_add_entries_per_subcrq,
2700 adapter->req_tx_entries_per_subcrq);
2701 return ret;
2702 }
2703
ibmvnic_get_channels(struct net_device * netdev,struct ethtool_channels * channels)2704 static void ibmvnic_get_channels(struct net_device *netdev,
2705 struct ethtool_channels *channels)
2706 {
2707 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2708
2709 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2710 channels->max_rx = adapter->max_rx_queues;
2711 channels->max_tx = adapter->max_tx_queues;
2712 } else {
2713 channels->max_rx = IBMVNIC_MAX_QUEUES;
2714 channels->max_tx = IBMVNIC_MAX_QUEUES;
2715 }
2716
2717 channels->max_other = 0;
2718 channels->max_combined = 0;
2719 channels->rx_count = adapter->req_rx_queues;
2720 channels->tx_count = adapter->req_tx_queues;
2721 channels->other_count = 0;
2722 channels->combined_count = 0;
2723 }
2724
ibmvnic_set_channels(struct net_device * netdev,struct ethtool_channels * channels)2725 static int ibmvnic_set_channels(struct net_device *netdev,
2726 struct ethtool_channels *channels)
2727 {
2728 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2729 int ret;
2730
2731 ret = 0;
2732 adapter->desired.rx_queues = channels->rx_count;
2733 adapter->desired.tx_queues = channels->tx_count;
2734
2735 ret = wait_for_reset(adapter);
2736
2737 if (!ret &&
2738 (adapter->req_rx_queues != channels->rx_count ||
2739 adapter->req_tx_queues != channels->tx_count))
2740 netdev_info(netdev,
2741 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2742 channels->rx_count, channels->tx_count,
2743 adapter->req_rx_queues, adapter->req_tx_queues);
2744 return ret;
2745
2746 }
2747
ibmvnic_get_strings(struct net_device * dev,u32 stringset,u8 * data)2748 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2749 {
2750 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2751 int i;
2752
2753 switch (stringset) {
2754 case ETH_SS_STATS:
2755 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2756 i++, data += ETH_GSTRING_LEN)
2757 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2758
2759 for (i = 0; i < adapter->req_tx_queues; i++) {
2760 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2761 data += ETH_GSTRING_LEN;
2762
2763 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2764 data += ETH_GSTRING_LEN;
2765
2766 snprintf(data, ETH_GSTRING_LEN,
2767 "tx%d_dropped_packets", i);
2768 data += ETH_GSTRING_LEN;
2769 }
2770
2771 for (i = 0; i < adapter->req_rx_queues; i++) {
2772 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2773 data += ETH_GSTRING_LEN;
2774
2775 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2776 data += ETH_GSTRING_LEN;
2777
2778 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2779 data += ETH_GSTRING_LEN;
2780 }
2781 break;
2782
2783 case ETH_SS_PRIV_FLAGS:
2784 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2785 strcpy(data + i * ETH_GSTRING_LEN,
2786 ibmvnic_priv_flags[i]);
2787 break;
2788 default:
2789 return;
2790 }
2791 }
2792
ibmvnic_get_sset_count(struct net_device * dev,int sset)2793 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2794 {
2795 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2796
2797 switch (sset) {
2798 case ETH_SS_STATS:
2799 return ARRAY_SIZE(ibmvnic_stats) +
2800 adapter->req_tx_queues * NUM_TX_STATS +
2801 adapter->req_rx_queues * NUM_RX_STATS;
2802 case ETH_SS_PRIV_FLAGS:
2803 return ARRAY_SIZE(ibmvnic_priv_flags);
2804 default:
2805 return -EOPNOTSUPP;
2806 }
2807 }
2808
ibmvnic_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)2809 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2810 struct ethtool_stats *stats, u64 *data)
2811 {
2812 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2813 union ibmvnic_crq crq;
2814 int i, j;
2815 int rc;
2816
2817 memset(&crq, 0, sizeof(crq));
2818 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2819 crq.request_statistics.cmd = REQUEST_STATISTICS;
2820 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2821 crq.request_statistics.len =
2822 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2823
2824 /* Wait for data to be written */
2825 reinit_completion(&adapter->stats_done);
2826 rc = ibmvnic_send_crq(adapter, &crq);
2827 if (rc)
2828 return;
2829 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2830 if (rc)
2831 return;
2832
2833 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2834 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2835 ibmvnic_stats[i].offset));
2836
2837 for (j = 0; j < adapter->req_tx_queues; j++) {
2838 data[i] = adapter->tx_stats_buffers[j].packets;
2839 i++;
2840 data[i] = adapter->tx_stats_buffers[j].bytes;
2841 i++;
2842 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2843 i++;
2844 }
2845
2846 for (j = 0; j < adapter->req_rx_queues; j++) {
2847 data[i] = adapter->rx_stats_buffers[j].packets;
2848 i++;
2849 data[i] = adapter->rx_stats_buffers[j].bytes;
2850 i++;
2851 data[i] = adapter->rx_stats_buffers[j].interrupts;
2852 i++;
2853 }
2854 }
2855
ibmvnic_get_priv_flags(struct net_device * netdev)2856 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2857 {
2858 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2859
2860 return adapter->priv_flags;
2861 }
2862
ibmvnic_set_priv_flags(struct net_device * netdev,u32 flags)2863 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2864 {
2865 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2866 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2867
2868 if (which_maxes)
2869 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2870 else
2871 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2872
2873 return 0;
2874 }
2875 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2876 .get_drvinfo = ibmvnic_get_drvinfo,
2877 .get_msglevel = ibmvnic_get_msglevel,
2878 .set_msglevel = ibmvnic_set_msglevel,
2879 .get_link = ibmvnic_get_link,
2880 .get_ringparam = ibmvnic_get_ringparam,
2881 .set_ringparam = ibmvnic_set_ringparam,
2882 .get_channels = ibmvnic_get_channels,
2883 .set_channels = ibmvnic_set_channels,
2884 .get_strings = ibmvnic_get_strings,
2885 .get_sset_count = ibmvnic_get_sset_count,
2886 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2887 .get_link_ksettings = ibmvnic_get_link_ksettings,
2888 .get_priv_flags = ibmvnic_get_priv_flags,
2889 .set_priv_flags = ibmvnic_set_priv_flags,
2890 };
2891
2892 /* Routines for managing CRQs/sCRQs */
2893
reset_one_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)2894 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2895 struct ibmvnic_sub_crq_queue *scrq)
2896 {
2897 int rc;
2898
2899 if (!scrq) {
2900 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
2901 return -EINVAL;
2902 }
2903
2904 if (scrq->irq) {
2905 free_irq(scrq->irq, scrq);
2906 irq_dispose_mapping(scrq->irq);
2907 scrq->irq = 0;
2908 }
2909 if (scrq->msgs) {
2910 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2911 atomic_set(&scrq->used, 0);
2912 scrq->cur = 0;
2913 } else {
2914 netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
2915 return -EINVAL;
2916 }
2917
2918 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2919 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2920 return rc;
2921 }
2922
reset_sub_crq_queues(struct ibmvnic_adapter * adapter)2923 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2924 {
2925 int i, rc;
2926
2927 if (!adapter->tx_scrq || !adapter->rx_scrq)
2928 return -EINVAL;
2929
2930 for (i = 0; i < adapter->req_tx_queues; i++) {
2931 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2932 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2933 if (rc)
2934 return rc;
2935 }
2936
2937 for (i = 0; i < adapter->req_rx_queues; i++) {
2938 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2939 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2940 if (rc)
2941 return rc;
2942 }
2943
2944 return rc;
2945 }
2946
release_sub_crq_queue(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq,bool do_h_free)2947 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2948 struct ibmvnic_sub_crq_queue *scrq,
2949 bool do_h_free)
2950 {
2951 struct device *dev = &adapter->vdev->dev;
2952 long rc;
2953
2954 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2955
2956 if (do_h_free) {
2957 /* Close the sub-crqs */
2958 do {
2959 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2960 adapter->vdev->unit_address,
2961 scrq->crq_num);
2962 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2963
2964 if (rc) {
2965 netdev_err(adapter->netdev,
2966 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2967 scrq->crq_num, rc);
2968 }
2969 }
2970
2971 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2972 DMA_BIDIRECTIONAL);
2973 free_pages((unsigned long)scrq->msgs, 2);
2974 kfree(scrq);
2975 }
2976
init_sub_crq_queue(struct ibmvnic_adapter * adapter)2977 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2978 *adapter)
2979 {
2980 struct device *dev = &adapter->vdev->dev;
2981 struct ibmvnic_sub_crq_queue *scrq;
2982 int rc;
2983
2984 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2985 if (!scrq)
2986 return NULL;
2987
2988 scrq->msgs =
2989 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2990 if (!scrq->msgs) {
2991 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2992 goto zero_page_failed;
2993 }
2994
2995 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2996 DMA_BIDIRECTIONAL);
2997 if (dma_mapping_error(dev, scrq->msg_token)) {
2998 dev_warn(dev, "Couldn't map crq queue messages page\n");
2999 goto map_failed;
3000 }
3001
3002 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3003 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3004
3005 if (rc == H_RESOURCE)
3006 rc = ibmvnic_reset_crq(adapter);
3007
3008 if (rc == H_CLOSED) {
3009 dev_warn(dev, "Partner adapter not ready, waiting.\n");
3010 } else if (rc) {
3011 dev_warn(dev, "Error %d registering sub-crq\n", rc);
3012 goto reg_failed;
3013 }
3014
3015 scrq->adapter = adapter;
3016 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
3017 spin_lock_init(&scrq->lock);
3018
3019 netdev_dbg(adapter->netdev,
3020 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
3021 scrq->crq_num, scrq->hw_irq, scrq->irq);
3022
3023 return scrq;
3024
3025 reg_failed:
3026 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3027 DMA_BIDIRECTIONAL);
3028 map_failed:
3029 free_pages((unsigned long)scrq->msgs, 2);
3030 zero_page_failed:
3031 kfree(scrq);
3032
3033 return NULL;
3034 }
3035
release_sub_crqs(struct ibmvnic_adapter * adapter,bool do_h_free)3036 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
3037 {
3038 int i;
3039
3040 if (adapter->tx_scrq) {
3041 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
3042 if (!adapter->tx_scrq[i])
3043 continue;
3044
3045 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
3046 i);
3047 if (adapter->tx_scrq[i]->irq) {
3048 free_irq(adapter->tx_scrq[i]->irq,
3049 adapter->tx_scrq[i]);
3050 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
3051 adapter->tx_scrq[i]->irq = 0;
3052 }
3053
3054 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
3055 do_h_free);
3056 }
3057
3058 kfree(adapter->tx_scrq);
3059 adapter->tx_scrq = NULL;
3060 adapter->num_active_tx_scrqs = 0;
3061 }
3062
3063 if (adapter->rx_scrq) {
3064 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
3065 if (!adapter->rx_scrq[i])
3066 continue;
3067
3068 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
3069 i);
3070 if (adapter->rx_scrq[i]->irq) {
3071 free_irq(adapter->rx_scrq[i]->irq,
3072 adapter->rx_scrq[i]);
3073 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
3074 adapter->rx_scrq[i]->irq = 0;
3075 }
3076
3077 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
3078 do_h_free);
3079 }
3080
3081 kfree(adapter->rx_scrq);
3082 adapter->rx_scrq = NULL;
3083 adapter->num_active_rx_scrqs = 0;
3084 }
3085 }
3086
disable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3087 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3088 struct ibmvnic_sub_crq_queue *scrq)
3089 {
3090 struct device *dev = &adapter->vdev->dev;
3091 unsigned long rc;
3092
3093 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3094 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3095 if (rc)
3096 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3097 scrq->hw_irq, rc);
3098 return rc;
3099 }
3100
enable_scrq_irq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3101 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3102 struct ibmvnic_sub_crq_queue *scrq)
3103 {
3104 struct device *dev = &adapter->vdev->dev;
3105 unsigned long rc;
3106
3107 if (scrq->hw_irq > 0x100000000ULL) {
3108 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3109 return 1;
3110 }
3111
3112 if (test_bit(0, &adapter->resetting) &&
3113 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3114 u64 val = (0xff000000) | scrq->hw_irq;
3115
3116 rc = plpar_hcall_norets(H_EOI, val);
3117 /* H_EOI would fail with rc = H_FUNCTION when running
3118 * in XIVE mode which is expected, but not an error.
3119 */
3120 if (rc && (rc != H_FUNCTION))
3121 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3122 val, rc);
3123 }
3124
3125 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3126 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3127 if (rc)
3128 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3129 scrq->hw_irq, rc);
3130 return rc;
3131 }
3132
ibmvnic_complete_tx(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3133 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3134 struct ibmvnic_sub_crq_queue *scrq)
3135 {
3136 struct device *dev = &adapter->vdev->dev;
3137 struct ibmvnic_tx_pool *tx_pool;
3138 struct ibmvnic_tx_buff *txbuff;
3139 union sub_crq *next;
3140 int index;
3141 int i, j;
3142
3143 restart_loop:
3144 while (pending_scrq(adapter, scrq)) {
3145 unsigned int pool = scrq->pool_index;
3146 int num_entries = 0;
3147
3148 /* The queue entry at the current index is peeked at above
3149 * to determine that there is a valid descriptor awaiting
3150 * processing. We want to be sure that the current slot
3151 * holds a valid descriptor before reading its contents.
3152 */
3153 dma_rmb();
3154
3155 next = ibmvnic_next_scrq(adapter, scrq);
3156 for (i = 0; i < next->tx_comp.num_comps; i++) {
3157 if (next->tx_comp.rcs[i])
3158 dev_err(dev, "tx error %x\n",
3159 next->tx_comp.rcs[i]);
3160 index = be32_to_cpu(next->tx_comp.correlators[i]);
3161 if (index & IBMVNIC_TSO_POOL_MASK) {
3162 tx_pool = &adapter->tso_pool[pool];
3163 index &= ~IBMVNIC_TSO_POOL_MASK;
3164 } else {
3165 tx_pool = &adapter->tx_pool[pool];
3166 }
3167
3168 txbuff = &tx_pool->tx_buff[index];
3169
3170 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3171 if (!txbuff->data_dma[j])
3172 continue;
3173
3174 txbuff->data_dma[j] = 0;
3175 }
3176
3177 if (txbuff->last_frag) {
3178 dev_kfree_skb_any(txbuff->skb);
3179 txbuff->skb = NULL;
3180 }
3181
3182 num_entries += txbuff->num_entries;
3183
3184 tx_pool->free_map[tx_pool->producer_index] = index;
3185 tx_pool->producer_index =
3186 (tx_pool->producer_index + 1) %
3187 tx_pool->num_buffers;
3188 }
3189 /* remove tx_comp scrq*/
3190 next->tx_comp.first = 0;
3191
3192 if (atomic_sub_return(num_entries, &scrq->used) <=
3193 (adapter->req_tx_entries_per_subcrq / 2) &&
3194 __netif_subqueue_stopped(adapter->netdev,
3195 scrq->pool_index)) {
3196 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3197 netdev_dbg(adapter->netdev, "Started queue %d\n",
3198 scrq->pool_index);
3199 }
3200 }
3201
3202 enable_scrq_irq(adapter, scrq);
3203
3204 if (pending_scrq(adapter, scrq)) {
3205 disable_scrq_irq(adapter, scrq);
3206 goto restart_loop;
3207 }
3208
3209 return 0;
3210 }
3211
ibmvnic_interrupt_tx(int irq,void * instance)3212 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3213 {
3214 struct ibmvnic_sub_crq_queue *scrq = instance;
3215 struct ibmvnic_adapter *adapter = scrq->adapter;
3216
3217 disable_scrq_irq(adapter, scrq);
3218 ibmvnic_complete_tx(adapter, scrq);
3219
3220 return IRQ_HANDLED;
3221 }
3222
ibmvnic_interrupt_rx(int irq,void * instance)3223 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3224 {
3225 struct ibmvnic_sub_crq_queue *scrq = instance;
3226 struct ibmvnic_adapter *adapter = scrq->adapter;
3227
3228 /* When booting a kdump kernel we can hit pending interrupts
3229 * prior to completing driver initialization.
3230 */
3231 if (unlikely(adapter->state != VNIC_OPEN))
3232 return IRQ_NONE;
3233
3234 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3235
3236 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3237 disable_scrq_irq(adapter, scrq);
3238 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3239 }
3240
3241 return IRQ_HANDLED;
3242 }
3243
init_sub_crq_irqs(struct ibmvnic_adapter * adapter)3244 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3245 {
3246 struct device *dev = &adapter->vdev->dev;
3247 struct ibmvnic_sub_crq_queue *scrq;
3248 int i = 0, j = 0;
3249 int rc = 0;
3250
3251 for (i = 0; i < adapter->req_tx_queues; i++) {
3252 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3253 i);
3254 scrq = adapter->tx_scrq[i];
3255 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3256
3257 if (!scrq->irq) {
3258 rc = -EINVAL;
3259 dev_err(dev, "Error mapping irq\n");
3260 goto req_tx_irq_failed;
3261 }
3262
3263 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3264 adapter->vdev->unit_address, i);
3265 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3266 0, scrq->name, scrq);
3267
3268 if (rc) {
3269 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3270 scrq->irq, rc);
3271 irq_dispose_mapping(scrq->irq);
3272 goto req_tx_irq_failed;
3273 }
3274 }
3275
3276 for (i = 0; i < adapter->req_rx_queues; i++) {
3277 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3278 i);
3279 scrq = adapter->rx_scrq[i];
3280 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3281 if (!scrq->irq) {
3282 rc = -EINVAL;
3283 dev_err(dev, "Error mapping irq\n");
3284 goto req_rx_irq_failed;
3285 }
3286 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3287 adapter->vdev->unit_address, i);
3288 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3289 0, scrq->name, scrq);
3290 if (rc) {
3291 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3292 scrq->irq, rc);
3293 irq_dispose_mapping(scrq->irq);
3294 goto req_rx_irq_failed;
3295 }
3296 }
3297 return rc;
3298
3299 req_rx_irq_failed:
3300 for (j = 0; j < i; j++) {
3301 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3302 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3303 }
3304 i = adapter->req_tx_queues;
3305 req_tx_irq_failed:
3306 for (j = 0; j < i; j++) {
3307 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3308 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3309 }
3310 release_sub_crqs(adapter, 1);
3311 return rc;
3312 }
3313
init_sub_crqs(struct ibmvnic_adapter * adapter)3314 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3315 {
3316 struct device *dev = &adapter->vdev->dev;
3317 struct ibmvnic_sub_crq_queue **allqueues;
3318 int registered_queues = 0;
3319 int total_queues;
3320 int more = 0;
3321 int i;
3322
3323 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3324
3325 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3326 if (!allqueues)
3327 return -1;
3328
3329 for (i = 0; i < total_queues; i++) {
3330 allqueues[i] = init_sub_crq_queue(adapter);
3331 if (!allqueues[i]) {
3332 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3333 break;
3334 }
3335 registered_queues++;
3336 }
3337
3338 /* Make sure we were able to register the minimum number of queues */
3339 if (registered_queues <
3340 adapter->min_tx_queues + adapter->min_rx_queues) {
3341 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3342 goto tx_failed;
3343 }
3344
3345 /* Distribute the failed allocated queues*/
3346 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3347 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3348 switch (i % 3) {
3349 case 0:
3350 if (adapter->req_rx_queues > adapter->min_rx_queues)
3351 adapter->req_rx_queues--;
3352 else
3353 more++;
3354 break;
3355 case 1:
3356 if (adapter->req_tx_queues > adapter->min_tx_queues)
3357 adapter->req_tx_queues--;
3358 else
3359 more++;
3360 break;
3361 }
3362 }
3363
3364 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3365 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3366 if (!adapter->tx_scrq)
3367 goto tx_failed;
3368
3369 for (i = 0; i < adapter->req_tx_queues; i++) {
3370 adapter->tx_scrq[i] = allqueues[i];
3371 adapter->tx_scrq[i]->pool_index = i;
3372 adapter->num_active_tx_scrqs++;
3373 }
3374
3375 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3376 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3377 if (!adapter->rx_scrq)
3378 goto rx_failed;
3379
3380 for (i = 0; i < adapter->req_rx_queues; i++) {
3381 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3382 adapter->rx_scrq[i]->scrq_num = i;
3383 adapter->num_active_rx_scrqs++;
3384 }
3385
3386 kfree(allqueues);
3387 return 0;
3388
3389 rx_failed:
3390 kfree(adapter->tx_scrq);
3391 adapter->tx_scrq = NULL;
3392 tx_failed:
3393 for (i = 0; i < registered_queues; i++)
3394 release_sub_crq_queue(adapter, allqueues[i], 1);
3395 kfree(allqueues);
3396 return -1;
3397 }
3398
send_request_cap(struct ibmvnic_adapter * adapter,int retry)3399 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3400 {
3401 struct device *dev = &adapter->vdev->dev;
3402 union ibmvnic_crq crq;
3403 int max_entries;
3404 int cap_reqs;
3405
3406 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on
3407 * the PROMISC flag). Initialize this count upfront. When the tasklet
3408 * receives a response to all of these, it will send the next protocol
3409 * message (QUERY_IP_OFFLOAD).
3410 */
3411 if (!(adapter->netdev->flags & IFF_PROMISC) ||
3412 adapter->promisc_supported)
3413 cap_reqs = 7;
3414 else
3415 cap_reqs = 6;
3416
3417 if (!retry) {
3418 /* Sub-CRQ entries are 32 byte long */
3419 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3420
3421 atomic_set(&adapter->running_cap_crqs, cap_reqs);
3422
3423 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3424 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3425 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3426 return;
3427 }
3428
3429 if (adapter->desired.mtu)
3430 adapter->req_mtu = adapter->desired.mtu;
3431 else
3432 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3433
3434 if (!adapter->desired.tx_entries)
3435 adapter->desired.tx_entries =
3436 adapter->max_tx_entries_per_subcrq;
3437 if (!adapter->desired.rx_entries)
3438 adapter->desired.rx_entries =
3439 adapter->max_rx_add_entries_per_subcrq;
3440
3441 max_entries = IBMVNIC_MAX_LTB_SIZE /
3442 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3443
3444 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3445 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3446 adapter->desired.tx_entries = max_entries;
3447 }
3448
3449 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3450 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3451 adapter->desired.rx_entries = max_entries;
3452 }
3453
3454 if (adapter->desired.tx_entries)
3455 adapter->req_tx_entries_per_subcrq =
3456 adapter->desired.tx_entries;
3457 else
3458 adapter->req_tx_entries_per_subcrq =
3459 adapter->max_tx_entries_per_subcrq;
3460
3461 if (adapter->desired.rx_entries)
3462 adapter->req_rx_add_entries_per_subcrq =
3463 adapter->desired.rx_entries;
3464 else
3465 adapter->req_rx_add_entries_per_subcrq =
3466 adapter->max_rx_add_entries_per_subcrq;
3467
3468 if (adapter->desired.tx_queues)
3469 adapter->req_tx_queues =
3470 adapter->desired.tx_queues;
3471 else
3472 adapter->req_tx_queues =
3473 adapter->opt_tx_comp_sub_queues;
3474
3475 if (adapter->desired.rx_queues)
3476 adapter->req_rx_queues =
3477 adapter->desired.rx_queues;
3478 else
3479 adapter->req_rx_queues =
3480 adapter->opt_rx_comp_queues;
3481
3482 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3483 } else {
3484 atomic_add(cap_reqs, &adapter->running_cap_crqs);
3485 }
3486 memset(&crq, 0, sizeof(crq));
3487 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3488 crq.request_capability.cmd = REQUEST_CAPABILITY;
3489
3490 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3491 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3492 cap_reqs--;
3493 ibmvnic_send_crq(adapter, &crq);
3494
3495 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3496 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3497 cap_reqs--;
3498 ibmvnic_send_crq(adapter, &crq);
3499
3500 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3501 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3502 cap_reqs--;
3503 ibmvnic_send_crq(adapter, &crq);
3504
3505 crq.request_capability.capability =
3506 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3507 crq.request_capability.number =
3508 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3509 cap_reqs--;
3510 ibmvnic_send_crq(adapter, &crq);
3511
3512 crq.request_capability.capability =
3513 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3514 crq.request_capability.number =
3515 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3516 cap_reqs--;
3517 ibmvnic_send_crq(adapter, &crq);
3518
3519 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3520 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3521 cap_reqs--;
3522 ibmvnic_send_crq(adapter, &crq);
3523
3524 if (adapter->netdev->flags & IFF_PROMISC) {
3525 if (adapter->promisc_supported) {
3526 crq.request_capability.capability =
3527 cpu_to_be16(PROMISC_REQUESTED);
3528 crq.request_capability.number = cpu_to_be64(1);
3529 cap_reqs--;
3530 ibmvnic_send_crq(adapter, &crq);
3531 }
3532 } else {
3533 crq.request_capability.capability =
3534 cpu_to_be16(PROMISC_REQUESTED);
3535 crq.request_capability.number = cpu_to_be64(0);
3536 cap_reqs--;
3537 ibmvnic_send_crq(adapter, &crq);
3538 }
3539
3540 /* Keep at end to catch any discrepancy between expected and actual
3541 * CRQs sent.
3542 */
3543 WARN_ON(cap_reqs != 0);
3544 }
3545
pending_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3546 static int pending_scrq(struct ibmvnic_adapter *adapter,
3547 struct ibmvnic_sub_crq_queue *scrq)
3548 {
3549 union sub_crq *entry = &scrq->msgs[scrq->cur];
3550
3551 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3552 return 1;
3553 else
3554 return 0;
3555 }
3556
ibmvnic_next_scrq(struct ibmvnic_adapter * adapter,struct ibmvnic_sub_crq_queue * scrq)3557 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3558 struct ibmvnic_sub_crq_queue *scrq)
3559 {
3560 union sub_crq *entry;
3561 unsigned long flags;
3562
3563 spin_lock_irqsave(&scrq->lock, flags);
3564 entry = &scrq->msgs[scrq->cur];
3565 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3566 if (++scrq->cur == scrq->size)
3567 scrq->cur = 0;
3568 } else {
3569 entry = NULL;
3570 }
3571 spin_unlock_irqrestore(&scrq->lock, flags);
3572
3573 /* Ensure that the entire buffer descriptor has been
3574 * loaded before reading its contents
3575 */
3576 dma_rmb();
3577
3578 return entry;
3579 }
3580
ibmvnic_next_crq(struct ibmvnic_adapter * adapter)3581 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3582 {
3583 struct ibmvnic_crq_queue *queue = &adapter->crq;
3584 union ibmvnic_crq *crq;
3585
3586 crq = &queue->msgs[queue->cur];
3587 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3588 if (++queue->cur == queue->size)
3589 queue->cur = 0;
3590 } else {
3591 crq = NULL;
3592 }
3593
3594 return crq;
3595 }
3596
print_subcrq_error(struct device * dev,int rc,const char * func)3597 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3598 {
3599 switch (rc) {
3600 case H_PARAMETER:
3601 dev_warn_ratelimited(dev,
3602 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3603 func, rc);
3604 break;
3605 case H_CLOSED:
3606 dev_warn_ratelimited(dev,
3607 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3608 func, rc);
3609 break;
3610 default:
3611 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3612 break;
3613 }
3614 }
3615
send_subcrq(struct ibmvnic_adapter * adapter,u64 remote_handle,union sub_crq * sub_crq)3616 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3617 union sub_crq *sub_crq)
3618 {
3619 unsigned int ua = adapter->vdev->unit_address;
3620 struct device *dev = &adapter->vdev->dev;
3621 u64 *u64_crq = (u64 *)sub_crq;
3622 int rc;
3623
3624 netdev_dbg(adapter->netdev,
3625 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3626 (unsigned long int)cpu_to_be64(remote_handle),
3627 (unsigned long int)cpu_to_be64(u64_crq[0]),
3628 (unsigned long int)cpu_to_be64(u64_crq[1]),
3629 (unsigned long int)cpu_to_be64(u64_crq[2]),
3630 (unsigned long int)cpu_to_be64(u64_crq[3]));
3631
3632 /* Make sure the hypervisor sees the complete request */
3633 mb();
3634
3635 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3636 cpu_to_be64(remote_handle),
3637 cpu_to_be64(u64_crq[0]),
3638 cpu_to_be64(u64_crq[1]),
3639 cpu_to_be64(u64_crq[2]),
3640 cpu_to_be64(u64_crq[3]));
3641
3642 if (rc)
3643 print_subcrq_error(dev, rc, __func__);
3644
3645 return rc;
3646 }
3647
send_subcrq_indirect(struct ibmvnic_adapter * adapter,u64 remote_handle,u64 ioba,u64 num_entries)3648 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3649 u64 remote_handle, u64 ioba, u64 num_entries)
3650 {
3651 unsigned int ua = adapter->vdev->unit_address;
3652 struct device *dev = &adapter->vdev->dev;
3653 int rc;
3654
3655 /* Make sure the hypervisor sees the complete request */
3656 mb();
3657 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3658 cpu_to_be64(remote_handle),
3659 ioba, num_entries);
3660
3661 if (rc)
3662 print_subcrq_error(dev, rc, __func__);
3663
3664 return rc;
3665 }
3666
ibmvnic_send_crq(struct ibmvnic_adapter * adapter,union ibmvnic_crq * crq)3667 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3668 union ibmvnic_crq *crq)
3669 {
3670 unsigned int ua = adapter->vdev->unit_address;
3671 struct device *dev = &adapter->vdev->dev;
3672 u64 *u64_crq = (u64 *)crq;
3673 int rc;
3674
3675 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3676 (unsigned long int)cpu_to_be64(u64_crq[0]),
3677 (unsigned long int)cpu_to_be64(u64_crq[1]));
3678
3679 if (!adapter->crq.active &&
3680 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3681 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3682 return -EINVAL;
3683 }
3684
3685 /* Make sure the hypervisor sees the complete request */
3686 mb();
3687
3688 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3689 cpu_to_be64(u64_crq[0]),
3690 cpu_to_be64(u64_crq[1]));
3691
3692 if (rc) {
3693 if (rc == H_CLOSED) {
3694 dev_warn(dev, "CRQ Queue closed\n");
3695 /* do not reset, report the fail, wait for passive init from server */
3696 }
3697
3698 dev_warn(dev, "Send error (rc=%d)\n", rc);
3699 }
3700
3701 return rc;
3702 }
3703
ibmvnic_send_crq_init(struct ibmvnic_adapter * adapter)3704 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3705 {
3706 struct device *dev = &adapter->vdev->dev;
3707 union ibmvnic_crq crq;
3708 int retries = 100;
3709 int rc;
3710
3711 memset(&crq, 0, sizeof(crq));
3712 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3713 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3714 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3715
3716 do {
3717 rc = ibmvnic_send_crq(adapter, &crq);
3718 if (rc != H_CLOSED)
3719 break;
3720 retries--;
3721 msleep(50);
3722
3723 } while (retries > 0);
3724
3725 if (rc) {
3726 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3727 return rc;
3728 }
3729
3730 return 0;
3731 }
3732
send_version_xchg(struct ibmvnic_adapter * adapter)3733 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3734 {
3735 union ibmvnic_crq crq;
3736
3737 memset(&crq, 0, sizeof(crq));
3738 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3739 crq.version_exchange.cmd = VERSION_EXCHANGE;
3740 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3741
3742 return ibmvnic_send_crq(adapter, &crq);
3743 }
3744
3745 struct vnic_login_client_data {
3746 u8 type;
3747 __be16 len;
3748 char name[];
3749 } __packed;
3750
vnic_client_data_len(struct ibmvnic_adapter * adapter)3751 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3752 {
3753 int len;
3754
3755 /* Calculate the amount of buffer space needed for the
3756 * vnic client data in the login buffer. There are four entries,
3757 * OS name, LPAR name, device name, and a null last entry.
3758 */
3759 len = 4 * sizeof(struct vnic_login_client_data);
3760 len += 6; /* "Linux" plus NULL */
3761 len += strlen(utsname()->nodename) + 1;
3762 len += strlen(adapter->netdev->name) + 1;
3763
3764 return len;
3765 }
3766
vnic_add_client_data(struct ibmvnic_adapter * adapter,struct vnic_login_client_data * vlcd)3767 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3768 struct vnic_login_client_data *vlcd)
3769 {
3770 const char *os_name = "Linux";
3771 int len;
3772
3773 /* Type 1 - LPAR OS */
3774 vlcd->type = 1;
3775 len = strlen(os_name) + 1;
3776 vlcd->len = cpu_to_be16(len);
3777 strncpy(vlcd->name, os_name, len);
3778 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3779
3780 /* Type 2 - LPAR name */
3781 vlcd->type = 2;
3782 len = strlen(utsname()->nodename) + 1;
3783 vlcd->len = cpu_to_be16(len);
3784 strncpy(vlcd->name, utsname()->nodename, len);
3785 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3786
3787 /* Type 3 - device name */
3788 vlcd->type = 3;
3789 len = strlen(adapter->netdev->name) + 1;
3790 vlcd->len = cpu_to_be16(len);
3791 strncpy(vlcd->name, adapter->netdev->name, len);
3792 }
3793
send_login(struct ibmvnic_adapter * adapter)3794 static int send_login(struct ibmvnic_adapter *adapter)
3795 {
3796 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3797 struct ibmvnic_login_buffer *login_buffer;
3798 struct device *dev = &adapter->vdev->dev;
3799 struct vnic_login_client_data *vlcd;
3800 dma_addr_t rsp_buffer_token;
3801 dma_addr_t buffer_token;
3802 size_t rsp_buffer_size;
3803 union ibmvnic_crq crq;
3804 int client_data_len;
3805 size_t buffer_size;
3806 __be64 *tx_list_p;
3807 __be64 *rx_list_p;
3808 int rc;
3809 int i;
3810
3811 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3812 netdev_err(adapter->netdev,
3813 "RX or TX queues are not allocated, device login failed\n");
3814 return -1;
3815 }
3816
3817 release_login_buffer(adapter);
3818 release_login_rsp_buffer(adapter);
3819
3820 client_data_len = vnic_client_data_len(adapter);
3821
3822 buffer_size =
3823 sizeof(struct ibmvnic_login_buffer) +
3824 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3825 client_data_len;
3826
3827 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3828 if (!login_buffer)
3829 goto buf_alloc_failed;
3830
3831 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3832 DMA_TO_DEVICE);
3833 if (dma_mapping_error(dev, buffer_token)) {
3834 dev_err(dev, "Couldn't map login buffer\n");
3835 goto buf_map_failed;
3836 }
3837
3838 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3839 sizeof(u64) * adapter->req_tx_queues +
3840 sizeof(u64) * adapter->req_rx_queues +
3841 sizeof(u64) * adapter->req_rx_queues +
3842 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3843
3844 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3845 if (!login_rsp_buffer)
3846 goto buf_rsp_alloc_failed;
3847
3848 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3849 rsp_buffer_size, DMA_FROM_DEVICE);
3850 if (dma_mapping_error(dev, rsp_buffer_token)) {
3851 dev_err(dev, "Couldn't map login rsp buffer\n");
3852 goto buf_rsp_map_failed;
3853 }
3854
3855 adapter->login_buf = login_buffer;
3856 adapter->login_buf_token = buffer_token;
3857 adapter->login_buf_sz = buffer_size;
3858 adapter->login_rsp_buf = login_rsp_buffer;
3859 adapter->login_rsp_buf_token = rsp_buffer_token;
3860 adapter->login_rsp_buf_sz = rsp_buffer_size;
3861
3862 login_buffer->len = cpu_to_be32(buffer_size);
3863 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3864 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3865 login_buffer->off_txcomp_subcrqs =
3866 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3867 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3868 login_buffer->off_rxcomp_subcrqs =
3869 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3870 sizeof(u64) * adapter->req_tx_queues);
3871 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3872 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3873
3874 tx_list_p = (__be64 *)((char *)login_buffer +
3875 sizeof(struct ibmvnic_login_buffer));
3876 rx_list_p = (__be64 *)((char *)login_buffer +
3877 sizeof(struct ibmvnic_login_buffer) +
3878 sizeof(u64) * adapter->req_tx_queues);
3879
3880 for (i = 0; i < adapter->req_tx_queues; i++) {
3881 if (adapter->tx_scrq[i]) {
3882 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3883 crq_num);
3884 }
3885 }
3886
3887 for (i = 0; i < adapter->req_rx_queues; i++) {
3888 if (adapter->rx_scrq[i]) {
3889 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3890 crq_num);
3891 }
3892 }
3893
3894 /* Insert vNIC login client data */
3895 vlcd = (struct vnic_login_client_data *)
3896 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3897 login_buffer->client_data_offset =
3898 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3899 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3900
3901 vnic_add_client_data(adapter, vlcd);
3902
3903 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3904 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3905 netdev_dbg(adapter->netdev, "%016lx\n",
3906 ((unsigned long int *)(adapter->login_buf))[i]);
3907 }
3908
3909 memset(&crq, 0, sizeof(crq));
3910 crq.login.first = IBMVNIC_CRQ_CMD;
3911 crq.login.cmd = LOGIN;
3912 crq.login.ioba = cpu_to_be32(buffer_token);
3913 crq.login.len = cpu_to_be32(buffer_size);
3914
3915 adapter->login_pending = true;
3916 rc = ibmvnic_send_crq(adapter, &crq);
3917 if (rc) {
3918 adapter->login_pending = false;
3919 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
3920 goto buf_rsp_map_failed;
3921 }
3922
3923 return 0;
3924
3925 buf_rsp_map_failed:
3926 kfree(login_rsp_buffer);
3927 adapter->login_rsp_buf = NULL;
3928 buf_rsp_alloc_failed:
3929 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3930 buf_map_failed:
3931 kfree(login_buffer);
3932 adapter->login_buf = NULL;
3933 buf_alloc_failed:
3934 return -1;
3935 }
3936
send_request_map(struct ibmvnic_adapter * adapter,dma_addr_t addr,u32 len,u8 map_id)3937 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3938 u32 len, u8 map_id)
3939 {
3940 union ibmvnic_crq crq;
3941
3942 memset(&crq, 0, sizeof(crq));
3943 crq.request_map.first = IBMVNIC_CRQ_CMD;
3944 crq.request_map.cmd = REQUEST_MAP;
3945 crq.request_map.map_id = map_id;
3946 crq.request_map.ioba = cpu_to_be32(addr);
3947 crq.request_map.len = cpu_to_be32(len);
3948 return ibmvnic_send_crq(adapter, &crq);
3949 }
3950
send_request_unmap(struct ibmvnic_adapter * adapter,u8 map_id)3951 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3952 {
3953 union ibmvnic_crq crq;
3954
3955 memset(&crq, 0, sizeof(crq));
3956 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3957 crq.request_unmap.cmd = REQUEST_UNMAP;
3958 crq.request_unmap.map_id = map_id;
3959 return ibmvnic_send_crq(adapter, &crq);
3960 }
3961
send_query_map(struct ibmvnic_adapter * adapter)3962 static void send_query_map(struct ibmvnic_adapter *adapter)
3963 {
3964 union ibmvnic_crq crq;
3965
3966 memset(&crq, 0, sizeof(crq));
3967 crq.query_map.first = IBMVNIC_CRQ_CMD;
3968 crq.query_map.cmd = QUERY_MAP;
3969 ibmvnic_send_crq(adapter, &crq);
3970 }
3971
3972 /* Send a series of CRQs requesting various capabilities of the VNIC server */
send_query_cap(struct ibmvnic_adapter * adapter)3973 static void send_query_cap(struct ibmvnic_adapter *adapter)
3974 {
3975 union ibmvnic_crq crq;
3976 int cap_reqs;
3977
3978 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count
3979 * upfront. When the tasklet receives a response to all of these, it
3980 * can send out the next protocol messaage (REQUEST_CAPABILITY).
3981 */
3982 cap_reqs = 25;
3983
3984 atomic_set(&adapter->running_cap_crqs, cap_reqs);
3985
3986 memset(&crq, 0, sizeof(crq));
3987 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3988 crq.query_capability.cmd = QUERY_CAPABILITY;
3989
3990 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3991 ibmvnic_send_crq(adapter, &crq);
3992 cap_reqs--;
3993
3994 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3995 ibmvnic_send_crq(adapter, &crq);
3996 cap_reqs--;
3997
3998 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3999 ibmvnic_send_crq(adapter, &crq);
4000 cap_reqs--;
4001
4002 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
4003 ibmvnic_send_crq(adapter, &crq);
4004 cap_reqs--;
4005
4006 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
4007 ibmvnic_send_crq(adapter, &crq);
4008 cap_reqs--;
4009
4010 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
4011 ibmvnic_send_crq(adapter, &crq);
4012 cap_reqs--;
4013
4014 crq.query_capability.capability =
4015 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
4016 ibmvnic_send_crq(adapter, &crq);
4017 cap_reqs--;
4018
4019 crq.query_capability.capability =
4020 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
4021 ibmvnic_send_crq(adapter, &crq);
4022 cap_reqs--;
4023
4024 crq.query_capability.capability =
4025 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
4026 ibmvnic_send_crq(adapter, &crq);
4027 cap_reqs--;
4028
4029 crq.query_capability.capability =
4030 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
4031 ibmvnic_send_crq(adapter, &crq);
4032 cap_reqs--;
4033
4034 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
4035 ibmvnic_send_crq(adapter, &crq);
4036 cap_reqs--;
4037
4038 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
4039 ibmvnic_send_crq(adapter, &crq);
4040 cap_reqs--;
4041
4042 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
4043 ibmvnic_send_crq(adapter, &crq);
4044 cap_reqs--;
4045
4046 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
4047 ibmvnic_send_crq(adapter, &crq);
4048 cap_reqs--;
4049
4050 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
4051 ibmvnic_send_crq(adapter, &crq);
4052 cap_reqs--;
4053
4054 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
4055 ibmvnic_send_crq(adapter, &crq);
4056 cap_reqs--;
4057
4058 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
4059 ibmvnic_send_crq(adapter, &crq);
4060 cap_reqs--;
4061
4062 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
4063 ibmvnic_send_crq(adapter, &crq);
4064 cap_reqs--;
4065
4066 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
4067 ibmvnic_send_crq(adapter, &crq);
4068 cap_reqs--;
4069
4070 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
4071 ibmvnic_send_crq(adapter, &crq);
4072 cap_reqs--;
4073
4074 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
4075 ibmvnic_send_crq(adapter, &crq);
4076 cap_reqs--;
4077
4078 crq.query_capability.capability =
4079 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
4080 ibmvnic_send_crq(adapter, &crq);
4081 cap_reqs--;
4082
4083 crq.query_capability.capability =
4084 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
4085 ibmvnic_send_crq(adapter, &crq);
4086 cap_reqs--;
4087
4088 crq.query_capability.capability =
4089 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
4090 ibmvnic_send_crq(adapter, &crq);
4091 cap_reqs--;
4092
4093 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
4094
4095 ibmvnic_send_crq(adapter, &crq);
4096 cap_reqs--;
4097
4098 /* Keep at end to catch any discrepancy between expected and actual
4099 * CRQs sent.
4100 */
4101 WARN_ON(cap_reqs != 0);
4102 }
4103
send_query_ip_offload(struct ibmvnic_adapter * adapter)4104 static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
4105 {
4106 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4107 struct device *dev = &adapter->vdev->dev;
4108 union ibmvnic_crq crq;
4109
4110 adapter->ip_offload_tok =
4111 dma_map_single(dev,
4112 &adapter->ip_offload_buf,
4113 buf_sz,
4114 DMA_FROM_DEVICE);
4115
4116 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4117 if (!firmware_has_feature(FW_FEATURE_CMO))
4118 dev_err(dev, "Couldn't map offload buffer\n");
4119 return;
4120 }
4121
4122 memset(&crq, 0, sizeof(crq));
4123 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4124 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4125 crq.query_ip_offload.len = cpu_to_be32(buf_sz);
4126 crq.query_ip_offload.ioba =
4127 cpu_to_be32(adapter->ip_offload_tok);
4128
4129 ibmvnic_send_crq(adapter, &crq);
4130 }
4131
send_control_ip_offload(struct ibmvnic_adapter * adapter)4132 static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
4133 {
4134 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
4135 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4136 struct device *dev = &adapter->vdev->dev;
4137 netdev_features_t old_hw_features = 0;
4138 union ibmvnic_crq crq;
4139
4140 adapter->ip_offload_ctrl_tok =
4141 dma_map_single(dev,
4142 ctrl_buf,
4143 sizeof(adapter->ip_offload_ctrl),
4144 DMA_TO_DEVICE);
4145
4146 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4147 dev_err(dev, "Couldn't map ip offload control buffer\n");
4148 return;
4149 }
4150
4151 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4152 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4153 ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4154 ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4155 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4156 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4157 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4158 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4159 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4160 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4161
4162 /* large_rx disabled for now, additional features needed */
4163 ctrl_buf->large_rx_ipv4 = 0;
4164 ctrl_buf->large_rx_ipv6 = 0;
4165
4166 if (adapter->state != VNIC_PROBING) {
4167 old_hw_features = adapter->netdev->hw_features;
4168 adapter->netdev->hw_features = 0;
4169 }
4170
4171 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4172
4173 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4174 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4175
4176 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4177 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4178
4179 if ((adapter->netdev->features &
4180 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4181 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4182
4183 if (buf->large_tx_ipv4)
4184 adapter->netdev->hw_features |= NETIF_F_TSO;
4185 if (buf->large_tx_ipv6)
4186 adapter->netdev->hw_features |= NETIF_F_TSO6;
4187
4188 if (adapter->state == VNIC_PROBING) {
4189 adapter->netdev->features |= adapter->netdev->hw_features;
4190 } else if (old_hw_features != adapter->netdev->hw_features) {
4191 netdev_features_t tmp = 0;
4192
4193 /* disable features no longer supported */
4194 adapter->netdev->features &= adapter->netdev->hw_features;
4195 /* turn on features now supported if previously enabled */
4196 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4197 adapter->netdev->hw_features;
4198 adapter->netdev->features |=
4199 tmp & adapter->netdev->wanted_features;
4200 }
4201
4202 memset(&crq, 0, sizeof(crq));
4203 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4204 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4205 crq.control_ip_offload.len =
4206 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4207 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4208 ibmvnic_send_crq(adapter, &crq);
4209 }
4210
handle_vpd_size_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4211 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4212 struct ibmvnic_adapter *adapter)
4213 {
4214 struct device *dev = &adapter->vdev->dev;
4215
4216 if (crq->get_vpd_size_rsp.rc.code) {
4217 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4218 crq->get_vpd_size_rsp.rc.code);
4219 complete(&adapter->fw_done);
4220 return;
4221 }
4222
4223 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4224 complete(&adapter->fw_done);
4225 }
4226
handle_vpd_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4227 static void handle_vpd_rsp(union ibmvnic_crq *crq,
4228 struct ibmvnic_adapter *adapter)
4229 {
4230 struct device *dev = &adapter->vdev->dev;
4231 unsigned char *substr = NULL;
4232 u8 fw_level_len = 0;
4233
4234 memset(adapter->fw_version, 0, 32);
4235
4236 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4237 DMA_FROM_DEVICE);
4238
4239 if (crq->get_vpd_rsp.rc.code) {
4240 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4241 crq->get_vpd_rsp.rc.code);
4242 goto complete;
4243 }
4244
4245 /* get the position of the firmware version info
4246 * located after the ASCII 'RM' substring in the buffer
4247 */
4248 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4249 if (!substr) {
4250 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4251 goto complete;
4252 }
4253
4254 /* get length of firmware level ASCII substring */
4255 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4256 fw_level_len = *(substr + 2);
4257 } else {
4258 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4259 goto complete;
4260 }
4261
4262 /* copy firmware version string from vpd into adapter */
4263 if ((substr + 3 + fw_level_len) <
4264 (adapter->vpd->buff + adapter->vpd->len)) {
4265 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4266 } else {
4267 dev_info(dev, "FW substr extrapolated VPD buff\n");
4268 }
4269
4270 complete:
4271 if (adapter->fw_version[0] == '\0')
4272 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4273 complete(&adapter->fw_done);
4274 }
4275
handle_query_ip_offload_rsp(struct ibmvnic_adapter * adapter)4276 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4277 {
4278 struct device *dev = &adapter->vdev->dev;
4279 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4280 int i;
4281
4282 dma_unmap_single(dev, adapter->ip_offload_tok,
4283 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4284
4285 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4286 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4287 netdev_dbg(adapter->netdev, "%016lx\n",
4288 ((unsigned long int *)(buf))[i]);
4289
4290 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4291 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4292 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4293 buf->tcp_ipv4_chksum);
4294 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4295 buf->tcp_ipv6_chksum);
4296 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4297 buf->udp_ipv4_chksum);
4298 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4299 buf->udp_ipv6_chksum);
4300 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4301 buf->large_tx_ipv4);
4302 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4303 buf->large_tx_ipv6);
4304 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4305 buf->large_rx_ipv4);
4306 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4307 buf->large_rx_ipv6);
4308 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4309 buf->max_ipv4_header_size);
4310 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4311 buf->max_ipv6_header_size);
4312 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4313 buf->max_tcp_header_size);
4314 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4315 buf->max_udp_header_size);
4316 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4317 buf->max_large_tx_size);
4318 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4319 buf->max_large_rx_size);
4320 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4321 buf->ipv6_extension_header);
4322 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4323 buf->tcp_pseudosum_req);
4324 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4325 buf->num_ipv6_ext_headers);
4326 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4327 buf->off_ipv6_ext_headers);
4328
4329 send_control_ip_offload(adapter);
4330 }
4331
ibmvnic_fw_err_cause(u16 cause)4332 static const char *ibmvnic_fw_err_cause(u16 cause)
4333 {
4334 switch (cause) {
4335 case ADAPTER_PROBLEM:
4336 return "adapter problem";
4337 case BUS_PROBLEM:
4338 return "bus problem";
4339 case FW_PROBLEM:
4340 return "firmware problem";
4341 case DD_PROBLEM:
4342 return "device driver problem";
4343 case EEH_RECOVERY:
4344 return "EEH recovery";
4345 case FW_UPDATED:
4346 return "firmware updated";
4347 case LOW_MEMORY:
4348 return "low Memory";
4349 default:
4350 return "unknown";
4351 }
4352 }
4353
handle_error_indication(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4354 static void handle_error_indication(union ibmvnic_crq *crq,
4355 struct ibmvnic_adapter *adapter)
4356 {
4357 struct device *dev = &adapter->vdev->dev;
4358 u16 cause;
4359
4360 cause = be16_to_cpu(crq->error_indication.error_cause);
4361
4362 dev_warn_ratelimited(dev,
4363 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4364 crq->error_indication.flags
4365 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4366 ibmvnic_fw_err_cause(cause));
4367
4368 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4369 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4370 else
4371 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4372 }
4373
handle_change_mac_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4374 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4375 struct ibmvnic_adapter *adapter)
4376 {
4377 struct net_device *netdev = adapter->netdev;
4378 struct device *dev = &adapter->vdev->dev;
4379 long rc;
4380
4381 rc = crq->change_mac_addr_rsp.rc.code;
4382 if (rc) {
4383 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4384 goto out;
4385 }
4386 /* crq->change_mac_addr.mac_addr is the requested one
4387 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4388 */
4389 ether_addr_copy(netdev->dev_addr,
4390 &crq->change_mac_addr_rsp.mac_addr[0]);
4391 ether_addr_copy(adapter->mac_addr,
4392 &crq->change_mac_addr_rsp.mac_addr[0]);
4393 out:
4394 complete(&adapter->fw_done);
4395 return rc;
4396 }
4397
handle_request_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4398 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4399 struct ibmvnic_adapter *adapter)
4400 {
4401 struct device *dev = &adapter->vdev->dev;
4402 u64 *req_value;
4403 char *name;
4404
4405 atomic_dec(&adapter->running_cap_crqs);
4406 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n",
4407 atomic_read(&adapter->running_cap_crqs));
4408 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4409 case REQ_TX_QUEUES:
4410 req_value = &adapter->req_tx_queues;
4411 name = "tx";
4412 break;
4413 case REQ_RX_QUEUES:
4414 req_value = &adapter->req_rx_queues;
4415 name = "rx";
4416 break;
4417 case REQ_RX_ADD_QUEUES:
4418 req_value = &adapter->req_rx_add_queues;
4419 name = "rx_add";
4420 break;
4421 case REQ_TX_ENTRIES_PER_SUBCRQ:
4422 req_value = &adapter->req_tx_entries_per_subcrq;
4423 name = "tx_entries_per_subcrq";
4424 break;
4425 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4426 req_value = &adapter->req_rx_add_entries_per_subcrq;
4427 name = "rx_add_entries_per_subcrq";
4428 break;
4429 case REQ_MTU:
4430 req_value = &adapter->req_mtu;
4431 name = "mtu";
4432 break;
4433 case PROMISC_REQUESTED:
4434 req_value = &adapter->promisc;
4435 name = "promisc";
4436 break;
4437 default:
4438 dev_err(dev, "Got invalid cap request rsp %d\n",
4439 crq->request_capability.capability);
4440 return;
4441 }
4442
4443 switch (crq->request_capability_rsp.rc.code) {
4444 case SUCCESS:
4445 break;
4446 case PARTIALSUCCESS:
4447 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4448 *req_value,
4449 (long int)be64_to_cpu(crq->request_capability_rsp.
4450 number), name);
4451
4452 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4453 REQ_MTU) {
4454 pr_err("mtu of %llu is not supported. Reverting.\n",
4455 *req_value);
4456 *req_value = adapter->fallback.mtu;
4457 } else {
4458 *req_value =
4459 be64_to_cpu(crq->request_capability_rsp.number);
4460 }
4461
4462 send_request_cap(adapter, 1);
4463 return;
4464 default:
4465 dev_err(dev, "Error %d in request cap rsp\n",
4466 crq->request_capability_rsp.rc.code);
4467 return;
4468 }
4469
4470 /* Done receiving requested capabilities, query IP offload support */
4471 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4472 adapter->wait_capability = false;
4473 send_query_ip_offload(adapter);
4474 }
4475 }
4476
handle_login_rsp(union ibmvnic_crq * login_rsp_crq,struct ibmvnic_adapter * adapter)4477 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4478 struct ibmvnic_adapter *adapter)
4479 {
4480 struct device *dev = &adapter->vdev->dev;
4481 struct net_device *netdev = adapter->netdev;
4482 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4483 struct ibmvnic_login_buffer *login = adapter->login_buf;
4484 u64 *tx_handle_array;
4485 u64 *rx_handle_array;
4486 int num_tx_pools;
4487 int num_rx_pools;
4488 u64 *size_array;
4489 int i;
4490
4491 /* CHECK: Test/set of login_pending does not need to be atomic
4492 * because only ibmvnic_tasklet tests/clears this.
4493 */
4494 if (!adapter->login_pending) {
4495 netdev_warn(netdev, "Ignoring unexpected login response\n");
4496 return 0;
4497 }
4498 adapter->login_pending = false;
4499
4500 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4501 DMA_TO_DEVICE);
4502 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4503 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4504
4505 /* If the number of queues requested can't be allocated by the
4506 * server, the login response will return with code 1. We will need
4507 * to resend the login buffer with fewer queues requested.
4508 */
4509 if (login_rsp_crq->generic.rc.code) {
4510 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4511 complete(&adapter->init_done);
4512 return 0;
4513 }
4514
4515 if (adapter->failover_pending) {
4516 adapter->init_done_rc = -EAGAIN;
4517 netdev_dbg(netdev, "Failover pending, ignoring login response\n");
4518 complete(&adapter->init_done);
4519 /* login response buffer will be released on reset */
4520 return 0;
4521 }
4522
4523 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4524
4525 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4526 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4527 netdev_dbg(adapter->netdev, "%016lx\n",
4528 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4529 }
4530
4531 /* Sanity checks */
4532 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4533 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4534 adapter->req_rx_add_queues !=
4535 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4536 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4537 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4538 return -EIO;
4539 }
4540 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4541 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4542 /* variable buffer sizes are not supported, so just read the
4543 * first entry.
4544 */
4545 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4546
4547 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4548 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4549
4550 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4551 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4552 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4553 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4554
4555 for (i = 0; i < num_tx_pools; i++)
4556 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4557
4558 for (i = 0; i < num_rx_pools; i++)
4559 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4560
4561 adapter->num_active_tx_scrqs = num_tx_pools;
4562 adapter->num_active_rx_scrqs = num_rx_pools;
4563 release_login_rsp_buffer(adapter);
4564 release_login_buffer(adapter);
4565 complete(&adapter->init_done);
4566
4567 return 0;
4568 }
4569
handle_request_unmap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4570 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4571 struct ibmvnic_adapter *adapter)
4572 {
4573 struct device *dev = &adapter->vdev->dev;
4574 long rc;
4575
4576 rc = crq->request_unmap_rsp.rc.code;
4577 if (rc)
4578 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4579 }
4580
handle_query_map_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4581 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4582 struct ibmvnic_adapter *adapter)
4583 {
4584 struct net_device *netdev = adapter->netdev;
4585 struct device *dev = &adapter->vdev->dev;
4586 long rc;
4587
4588 rc = crq->query_map_rsp.rc.code;
4589 if (rc) {
4590 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4591 return;
4592 }
4593 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4594 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4595 crq->query_map_rsp.free_pages);
4596 }
4597
handle_query_cap_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4598 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4599 struct ibmvnic_adapter *adapter)
4600 {
4601 struct net_device *netdev = adapter->netdev;
4602 struct device *dev = &adapter->vdev->dev;
4603 long rc;
4604
4605 atomic_dec(&adapter->running_cap_crqs);
4606 netdev_dbg(netdev, "Outstanding queries: %d\n",
4607 atomic_read(&adapter->running_cap_crqs));
4608 rc = crq->query_capability.rc.code;
4609 if (rc) {
4610 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4611 goto out;
4612 }
4613
4614 switch (be16_to_cpu(crq->query_capability.capability)) {
4615 case MIN_TX_QUEUES:
4616 adapter->min_tx_queues =
4617 be64_to_cpu(crq->query_capability.number);
4618 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4619 adapter->min_tx_queues);
4620 break;
4621 case MIN_RX_QUEUES:
4622 adapter->min_rx_queues =
4623 be64_to_cpu(crq->query_capability.number);
4624 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4625 adapter->min_rx_queues);
4626 break;
4627 case MIN_RX_ADD_QUEUES:
4628 adapter->min_rx_add_queues =
4629 be64_to_cpu(crq->query_capability.number);
4630 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4631 adapter->min_rx_add_queues);
4632 break;
4633 case MAX_TX_QUEUES:
4634 adapter->max_tx_queues =
4635 be64_to_cpu(crq->query_capability.number);
4636 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4637 adapter->max_tx_queues);
4638 break;
4639 case MAX_RX_QUEUES:
4640 adapter->max_rx_queues =
4641 be64_to_cpu(crq->query_capability.number);
4642 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4643 adapter->max_rx_queues);
4644 break;
4645 case MAX_RX_ADD_QUEUES:
4646 adapter->max_rx_add_queues =
4647 be64_to_cpu(crq->query_capability.number);
4648 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4649 adapter->max_rx_add_queues);
4650 break;
4651 case MIN_TX_ENTRIES_PER_SUBCRQ:
4652 adapter->min_tx_entries_per_subcrq =
4653 be64_to_cpu(crq->query_capability.number);
4654 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4655 adapter->min_tx_entries_per_subcrq);
4656 break;
4657 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4658 adapter->min_rx_add_entries_per_subcrq =
4659 be64_to_cpu(crq->query_capability.number);
4660 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4661 adapter->min_rx_add_entries_per_subcrq);
4662 break;
4663 case MAX_TX_ENTRIES_PER_SUBCRQ:
4664 adapter->max_tx_entries_per_subcrq =
4665 be64_to_cpu(crq->query_capability.number);
4666 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4667 adapter->max_tx_entries_per_subcrq);
4668 break;
4669 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4670 adapter->max_rx_add_entries_per_subcrq =
4671 be64_to_cpu(crq->query_capability.number);
4672 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4673 adapter->max_rx_add_entries_per_subcrq);
4674 break;
4675 case TCP_IP_OFFLOAD:
4676 adapter->tcp_ip_offload =
4677 be64_to_cpu(crq->query_capability.number);
4678 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4679 adapter->tcp_ip_offload);
4680 break;
4681 case PROMISC_SUPPORTED:
4682 adapter->promisc_supported =
4683 be64_to_cpu(crq->query_capability.number);
4684 netdev_dbg(netdev, "promisc_supported = %lld\n",
4685 adapter->promisc_supported);
4686 break;
4687 case MIN_MTU:
4688 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4689 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4690 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4691 break;
4692 case MAX_MTU:
4693 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4694 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4695 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4696 break;
4697 case MAX_MULTICAST_FILTERS:
4698 adapter->max_multicast_filters =
4699 be64_to_cpu(crq->query_capability.number);
4700 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4701 adapter->max_multicast_filters);
4702 break;
4703 case VLAN_HEADER_INSERTION:
4704 adapter->vlan_header_insertion =
4705 be64_to_cpu(crq->query_capability.number);
4706 if (adapter->vlan_header_insertion)
4707 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4708 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4709 adapter->vlan_header_insertion);
4710 break;
4711 case RX_VLAN_HEADER_INSERTION:
4712 adapter->rx_vlan_header_insertion =
4713 be64_to_cpu(crq->query_capability.number);
4714 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4715 adapter->rx_vlan_header_insertion);
4716 break;
4717 case MAX_TX_SG_ENTRIES:
4718 adapter->max_tx_sg_entries =
4719 be64_to_cpu(crq->query_capability.number);
4720 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4721 adapter->max_tx_sg_entries);
4722 break;
4723 case RX_SG_SUPPORTED:
4724 adapter->rx_sg_supported =
4725 be64_to_cpu(crq->query_capability.number);
4726 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4727 adapter->rx_sg_supported);
4728 break;
4729 case OPT_TX_COMP_SUB_QUEUES:
4730 adapter->opt_tx_comp_sub_queues =
4731 be64_to_cpu(crq->query_capability.number);
4732 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4733 adapter->opt_tx_comp_sub_queues);
4734 break;
4735 case OPT_RX_COMP_QUEUES:
4736 adapter->opt_rx_comp_queues =
4737 be64_to_cpu(crq->query_capability.number);
4738 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4739 adapter->opt_rx_comp_queues);
4740 break;
4741 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4742 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4743 be64_to_cpu(crq->query_capability.number);
4744 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4745 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4746 break;
4747 case OPT_TX_ENTRIES_PER_SUBCRQ:
4748 adapter->opt_tx_entries_per_subcrq =
4749 be64_to_cpu(crq->query_capability.number);
4750 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4751 adapter->opt_tx_entries_per_subcrq);
4752 break;
4753 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4754 adapter->opt_rxba_entries_per_subcrq =
4755 be64_to_cpu(crq->query_capability.number);
4756 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4757 adapter->opt_rxba_entries_per_subcrq);
4758 break;
4759 case TX_RX_DESC_REQ:
4760 adapter->tx_rx_desc_req = crq->query_capability.number;
4761 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4762 adapter->tx_rx_desc_req);
4763 break;
4764
4765 default:
4766 netdev_err(netdev, "Got invalid cap rsp %d\n",
4767 crq->query_capability.capability);
4768 }
4769
4770 out:
4771 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4772 adapter->wait_capability = false;
4773 send_request_cap(adapter, 0);
4774 }
4775 }
4776
send_query_phys_parms(struct ibmvnic_adapter * adapter)4777 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4778 {
4779 union ibmvnic_crq crq;
4780 int rc;
4781
4782 memset(&crq, 0, sizeof(crq));
4783 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4784 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4785
4786 mutex_lock(&adapter->fw_lock);
4787 adapter->fw_done_rc = 0;
4788 reinit_completion(&adapter->fw_done);
4789
4790 rc = ibmvnic_send_crq(adapter, &crq);
4791 if (rc) {
4792 mutex_unlock(&adapter->fw_lock);
4793 return rc;
4794 }
4795
4796 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4797 if (rc) {
4798 mutex_unlock(&adapter->fw_lock);
4799 return rc;
4800 }
4801
4802 mutex_unlock(&adapter->fw_lock);
4803 return adapter->fw_done_rc ? -EIO : 0;
4804 }
4805
handle_query_phys_parms_rsp(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4806 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4807 struct ibmvnic_adapter *adapter)
4808 {
4809 struct net_device *netdev = adapter->netdev;
4810 int rc;
4811 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4812
4813 rc = crq->query_phys_parms_rsp.rc.code;
4814 if (rc) {
4815 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4816 return rc;
4817 }
4818 switch (rspeed) {
4819 case IBMVNIC_10MBPS:
4820 adapter->speed = SPEED_10;
4821 break;
4822 case IBMVNIC_100MBPS:
4823 adapter->speed = SPEED_100;
4824 break;
4825 case IBMVNIC_1GBPS:
4826 adapter->speed = SPEED_1000;
4827 break;
4828 case IBMVNIC_10GBPS:
4829 adapter->speed = SPEED_10000;
4830 break;
4831 case IBMVNIC_25GBPS:
4832 adapter->speed = SPEED_25000;
4833 break;
4834 case IBMVNIC_40GBPS:
4835 adapter->speed = SPEED_40000;
4836 break;
4837 case IBMVNIC_50GBPS:
4838 adapter->speed = SPEED_50000;
4839 break;
4840 case IBMVNIC_100GBPS:
4841 adapter->speed = SPEED_100000;
4842 break;
4843 case IBMVNIC_200GBPS:
4844 adapter->speed = SPEED_200000;
4845 break;
4846 default:
4847 if (netif_carrier_ok(netdev))
4848 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4849 adapter->speed = SPEED_UNKNOWN;
4850 }
4851 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4852 adapter->duplex = DUPLEX_FULL;
4853 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4854 adapter->duplex = DUPLEX_HALF;
4855 else
4856 adapter->duplex = DUPLEX_UNKNOWN;
4857
4858 return rc;
4859 }
4860
ibmvnic_handle_crq(union ibmvnic_crq * crq,struct ibmvnic_adapter * adapter)4861 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4862 struct ibmvnic_adapter *adapter)
4863 {
4864 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4865 struct net_device *netdev = adapter->netdev;
4866 struct device *dev = &adapter->vdev->dev;
4867 u64 *u64_crq = (u64 *)crq;
4868 long rc;
4869
4870 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4871 (unsigned long int)cpu_to_be64(u64_crq[0]),
4872 (unsigned long int)cpu_to_be64(u64_crq[1]));
4873 switch (gen_crq->first) {
4874 case IBMVNIC_CRQ_INIT_RSP:
4875 switch (gen_crq->cmd) {
4876 case IBMVNIC_CRQ_INIT:
4877 dev_info(dev, "Partner initialized\n");
4878 adapter->from_passive_init = true;
4879 /* Discard any stale login responses from prev reset.
4880 * CHECK: should we clear even on INIT_COMPLETE?
4881 */
4882 adapter->login_pending = false;
4883
4884 if (!completion_done(&adapter->init_done)) {
4885 complete(&adapter->init_done);
4886 adapter->init_done_rc = -EIO;
4887 }
4888 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4889 if (rc && rc != -EBUSY) {
4890 /* We were unable to schedule the failover
4891 * reset either because the adapter was still
4892 * probing (eg: during kexec) or we could not
4893 * allocate memory. Clear the failover_pending
4894 * flag since no one else will. We ignore
4895 * EBUSY because it means either FAILOVER reset
4896 * is already scheduled or the adapter is
4897 * being removed.
4898 */
4899 netdev_err(netdev,
4900 "Error %ld scheduling failover reset\n",
4901 rc);
4902 adapter->failover_pending = false;
4903 }
4904 break;
4905 case IBMVNIC_CRQ_INIT_COMPLETE:
4906 dev_info(dev, "Partner initialization complete\n");
4907 adapter->crq.active = true;
4908 send_version_xchg(adapter);
4909 break;
4910 default:
4911 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4912 }
4913 return;
4914 case IBMVNIC_CRQ_XPORT_EVENT:
4915 netif_carrier_off(netdev);
4916 adapter->crq.active = false;
4917 /* terminate any thread waiting for a response
4918 * from the device
4919 */
4920 if (!completion_done(&adapter->fw_done)) {
4921 adapter->fw_done_rc = -EIO;
4922 complete(&adapter->fw_done);
4923 }
4924 if (!completion_done(&adapter->stats_done))
4925 complete(&adapter->stats_done);
4926 if (test_bit(0, &adapter->resetting))
4927 adapter->force_reset_recovery = true;
4928 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4929 dev_info(dev, "Migrated, re-enabling adapter\n");
4930 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4931 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4932 dev_info(dev, "Backing device failover detected\n");
4933 adapter->failover_pending = true;
4934 } else {
4935 /* The adapter lost the connection */
4936 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4937 gen_crq->cmd);
4938 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4939 }
4940 return;
4941 case IBMVNIC_CRQ_CMD_RSP:
4942 break;
4943 default:
4944 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4945 gen_crq->first);
4946 return;
4947 }
4948
4949 switch (gen_crq->cmd) {
4950 case VERSION_EXCHANGE_RSP:
4951 rc = crq->version_exchange_rsp.rc.code;
4952 if (rc) {
4953 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4954 break;
4955 }
4956 ibmvnic_version =
4957 be16_to_cpu(crq->version_exchange_rsp.version);
4958 dev_info(dev, "Partner protocol version is %d\n",
4959 ibmvnic_version);
4960 send_query_cap(adapter);
4961 break;
4962 case QUERY_CAPABILITY_RSP:
4963 handle_query_cap_rsp(crq, adapter);
4964 break;
4965 case QUERY_MAP_RSP:
4966 handle_query_map_rsp(crq, adapter);
4967 break;
4968 case REQUEST_MAP_RSP:
4969 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4970 complete(&adapter->fw_done);
4971 break;
4972 case REQUEST_UNMAP_RSP:
4973 handle_request_unmap_rsp(crq, adapter);
4974 break;
4975 case REQUEST_CAPABILITY_RSP:
4976 handle_request_cap_rsp(crq, adapter);
4977 break;
4978 case LOGIN_RSP:
4979 netdev_dbg(netdev, "Got Login Response\n");
4980 handle_login_rsp(crq, adapter);
4981 break;
4982 case LOGICAL_LINK_STATE_RSP:
4983 netdev_dbg(netdev,
4984 "Got Logical Link State Response, state: %d rc: %d\n",
4985 crq->logical_link_state_rsp.link_state,
4986 crq->logical_link_state_rsp.rc.code);
4987 adapter->logical_link_state =
4988 crq->logical_link_state_rsp.link_state;
4989 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4990 complete(&adapter->init_done);
4991 break;
4992 case LINK_STATE_INDICATION:
4993 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4994 adapter->phys_link_state =
4995 crq->link_state_indication.phys_link_state;
4996 adapter->logical_link_state =
4997 crq->link_state_indication.logical_link_state;
4998 if (adapter->phys_link_state && adapter->logical_link_state)
4999 netif_carrier_on(netdev);
5000 else
5001 netif_carrier_off(netdev);
5002 break;
5003 case CHANGE_MAC_ADDR_RSP:
5004 netdev_dbg(netdev, "Got MAC address change Response\n");
5005 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
5006 break;
5007 case ERROR_INDICATION:
5008 netdev_dbg(netdev, "Got Error Indication\n");
5009 handle_error_indication(crq, adapter);
5010 break;
5011 case REQUEST_STATISTICS_RSP:
5012 netdev_dbg(netdev, "Got Statistics Response\n");
5013 complete(&adapter->stats_done);
5014 break;
5015 case QUERY_IP_OFFLOAD_RSP:
5016 netdev_dbg(netdev, "Got Query IP offload Response\n");
5017 handle_query_ip_offload_rsp(adapter);
5018 break;
5019 case MULTICAST_CTRL_RSP:
5020 netdev_dbg(netdev, "Got multicast control Response\n");
5021 break;
5022 case CONTROL_IP_OFFLOAD_RSP:
5023 netdev_dbg(netdev, "Got Control IP offload Response\n");
5024 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
5025 sizeof(adapter->ip_offload_ctrl),
5026 DMA_TO_DEVICE);
5027 complete(&adapter->init_done);
5028 break;
5029 case COLLECT_FW_TRACE_RSP:
5030 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
5031 complete(&adapter->fw_done);
5032 break;
5033 case GET_VPD_SIZE_RSP:
5034 handle_vpd_size_rsp(crq, adapter);
5035 break;
5036 case GET_VPD_RSP:
5037 handle_vpd_rsp(crq, adapter);
5038 break;
5039 case QUERY_PHYS_PARMS_RSP:
5040 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
5041 complete(&adapter->fw_done);
5042 break;
5043 default:
5044 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
5045 gen_crq->cmd);
5046 }
5047 }
5048
ibmvnic_interrupt(int irq,void * instance)5049 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
5050 {
5051 struct ibmvnic_adapter *adapter = instance;
5052
5053 tasklet_schedule(&adapter->tasklet);
5054 return IRQ_HANDLED;
5055 }
5056
ibmvnic_tasklet(struct tasklet_struct * t)5057 static void ibmvnic_tasklet(struct tasklet_struct *t)
5058 {
5059 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
5060 struct ibmvnic_crq_queue *queue = &adapter->crq;
5061 union ibmvnic_crq *crq;
5062 unsigned long flags;
5063 bool done = false;
5064
5065 spin_lock_irqsave(&queue->lock, flags);
5066 while (!done) {
5067 /* Pull all the valid messages off the CRQ */
5068 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
5069 /* This barrier makes sure ibmvnic_next_crq()'s
5070 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
5071 * before ibmvnic_handle_crq()'s
5072 * switch(gen_crq->first) and switch(gen_crq->cmd).
5073 */
5074 dma_rmb();
5075 ibmvnic_handle_crq(crq, adapter);
5076 crq->generic.first = 0;
5077 }
5078 }
5079 /* if capabilities CRQ's were sent in this tasklet, the following
5080 * tasklet must wait until all responses are received
5081 */
5082 if (atomic_read(&adapter->running_cap_crqs) != 0)
5083 adapter->wait_capability = true;
5084 spin_unlock_irqrestore(&queue->lock, flags);
5085 }
5086
ibmvnic_reenable_crq_queue(struct ibmvnic_adapter * adapter)5087 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
5088 {
5089 struct vio_dev *vdev = adapter->vdev;
5090 int rc;
5091
5092 do {
5093 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
5094 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
5095
5096 if (rc)
5097 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
5098
5099 return rc;
5100 }
5101
ibmvnic_reset_crq(struct ibmvnic_adapter * adapter)5102 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
5103 {
5104 struct ibmvnic_crq_queue *crq = &adapter->crq;
5105 struct device *dev = &adapter->vdev->dev;
5106 struct vio_dev *vdev = adapter->vdev;
5107 int rc;
5108
5109 /* Close the CRQ */
5110 do {
5111 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5112 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5113
5114 /* Clean out the queue */
5115 if (!crq->msgs)
5116 return -EINVAL;
5117
5118 memset(crq->msgs, 0, PAGE_SIZE);
5119 crq->cur = 0;
5120 crq->active = false;
5121
5122 /* And re-open it again */
5123 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5124 crq->msg_token, PAGE_SIZE);
5125
5126 if (rc == H_CLOSED)
5127 /* Adapter is good, but other end is not ready */
5128 dev_warn(dev, "Partner adapter not ready\n");
5129 else if (rc != 0)
5130 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
5131
5132 return rc;
5133 }
5134
release_crq_queue(struct ibmvnic_adapter * adapter)5135 static void release_crq_queue(struct ibmvnic_adapter *adapter)
5136 {
5137 struct ibmvnic_crq_queue *crq = &adapter->crq;
5138 struct vio_dev *vdev = adapter->vdev;
5139 long rc;
5140
5141 if (!crq->msgs)
5142 return;
5143
5144 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
5145 free_irq(vdev->irq, adapter);
5146 tasklet_kill(&adapter->tasklet);
5147 do {
5148 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5149 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5150
5151 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
5152 DMA_BIDIRECTIONAL);
5153 free_page((unsigned long)crq->msgs);
5154 crq->msgs = NULL;
5155 crq->active = false;
5156 }
5157
init_crq_queue(struct ibmvnic_adapter * adapter)5158 static int init_crq_queue(struct ibmvnic_adapter *adapter)
5159 {
5160 struct ibmvnic_crq_queue *crq = &adapter->crq;
5161 struct device *dev = &adapter->vdev->dev;
5162 struct vio_dev *vdev = adapter->vdev;
5163 int rc, retrc = -ENOMEM;
5164
5165 if (crq->msgs)
5166 return 0;
5167
5168 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
5169 /* Should we allocate more than one page? */
5170
5171 if (!crq->msgs)
5172 return -ENOMEM;
5173
5174 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
5175 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
5176 DMA_BIDIRECTIONAL);
5177 if (dma_mapping_error(dev, crq->msg_token))
5178 goto map_failed;
5179
5180 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5181 crq->msg_token, PAGE_SIZE);
5182
5183 if (rc == H_RESOURCE)
5184 /* maybe kexecing and resource is busy. try a reset */
5185 rc = ibmvnic_reset_crq(adapter);
5186 retrc = rc;
5187
5188 if (rc == H_CLOSED) {
5189 dev_warn(dev, "Partner adapter not ready\n");
5190 } else if (rc) {
5191 dev_warn(dev, "Error %d opening adapter\n", rc);
5192 goto reg_crq_failed;
5193 }
5194
5195 retrc = 0;
5196
5197 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5198
5199 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5200 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5201 adapter->vdev->unit_address);
5202 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5203 if (rc) {
5204 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5205 vdev->irq, rc);
5206 goto req_irq_failed;
5207 }
5208
5209 rc = vio_enable_interrupts(vdev);
5210 if (rc) {
5211 dev_err(dev, "Error %d enabling interrupts\n", rc);
5212 goto req_irq_failed;
5213 }
5214
5215 crq->cur = 0;
5216 spin_lock_init(&crq->lock);
5217
5218 /* process any CRQs that were queued before we enabled interrupts */
5219 tasklet_schedule(&adapter->tasklet);
5220
5221 return retrc;
5222
5223 req_irq_failed:
5224 tasklet_kill(&adapter->tasklet);
5225 do {
5226 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5227 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5228 reg_crq_failed:
5229 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5230 map_failed:
5231 free_page((unsigned long)crq->msgs);
5232 crq->msgs = NULL;
5233 return retrc;
5234 }
5235
ibmvnic_reset_init(struct ibmvnic_adapter * adapter,bool reset)5236 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5237 {
5238 struct device *dev = &adapter->vdev->dev;
5239 unsigned long timeout = msecs_to_jiffies(20000);
5240 u64 old_num_rx_queues = adapter->req_rx_queues;
5241 u64 old_num_tx_queues = adapter->req_tx_queues;
5242 int rc;
5243
5244 adapter->from_passive_init = false;
5245
5246 if (reset)
5247 reinit_completion(&adapter->init_done);
5248
5249 adapter->init_done_rc = 0;
5250 rc = ibmvnic_send_crq_init(adapter);
5251 if (rc) {
5252 dev_err(dev, "Send crq init failed with error %d\n", rc);
5253 return rc;
5254 }
5255
5256 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5257 dev_err(dev, "Initialization sequence timed out\n");
5258 return -1;
5259 }
5260
5261 if (adapter->init_done_rc) {
5262 release_crq_queue(adapter);
5263 return adapter->init_done_rc;
5264 }
5265
5266 if (adapter->from_passive_init) {
5267 adapter->state = VNIC_OPEN;
5268 adapter->from_passive_init = false;
5269 return -1;
5270 }
5271
5272 if (reset &&
5273 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5274 adapter->reset_reason != VNIC_RESET_MOBILITY) {
5275 if (adapter->req_rx_queues != old_num_rx_queues ||
5276 adapter->req_tx_queues != old_num_tx_queues) {
5277 release_sub_crqs(adapter, 0);
5278 rc = init_sub_crqs(adapter);
5279 } else {
5280 rc = reset_sub_crq_queues(adapter);
5281 }
5282 } else {
5283 rc = init_sub_crqs(adapter);
5284 }
5285
5286 if (rc) {
5287 dev_err(dev, "Initialization of sub crqs failed\n");
5288 release_crq_queue(adapter);
5289 return rc;
5290 }
5291
5292 rc = init_sub_crq_irqs(adapter);
5293 if (rc) {
5294 dev_err(dev, "Failed to initialize sub crq irqs\n");
5295 release_crq_queue(adapter);
5296 }
5297
5298 return rc;
5299 }
5300
5301 static struct device_attribute dev_attr_failover;
5302
ibmvnic_probe(struct vio_dev * dev,const struct vio_device_id * id)5303 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5304 {
5305 struct ibmvnic_adapter *adapter;
5306 struct net_device *netdev;
5307 unsigned char *mac_addr_p;
5308 int rc;
5309
5310 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5311 dev->unit_address);
5312
5313 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5314 VETH_MAC_ADDR, NULL);
5315 if (!mac_addr_p) {
5316 dev_err(&dev->dev,
5317 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5318 __FILE__, __LINE__);
5319 return 0;
5320 }
5321
5322 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5323 IBMVNIC_MAX_QUEUES);
5324 if (!netdev)
5325 return -ENOMEM;
5326
5327 adapter = netdev_priv(netdev);
5328 adapter->state = VNIC_PROBING;
5329 dev_set_drvdata(&dev->dev, netdev);
5330 adapter->vdev = dev;
5331 adapter->netdev = netdev;
5332 adapter->login_pending = false;
5333
5334 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5335 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5336 netdev->irq = dev->irq;
5337 netdev->netdev_ops = &ibmvnic_netdev_ops;
5338 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5339 SET_NETDEV_DEV(netdev, &dev->dev);
5340
5341 spin_lock_init(&adapter->stats_lock);
5342
5343 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5344 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5345 __ibmvnic_delayed_reset);
5346 INIT_LIST_HEAD(&adapter->rwi_list);
5347 spin_lock_init(&adapter->rwi_lock);
5348 spin_lock_init(&adapter->state_lock);
5349 mutex_init(&adapter->fw_lock);
5350 init_completion(&adapter->init_done);
5351 init_completion(&adapter->fw_done);
5352 init_completion(&adapter->reset_done);
5353 init_completion(&adapter->stats_done);
5354 clear_bit(0, &adapter->resetting);
5355
5356 do {
5357 rc = init_crq_queue(adapter);
5358 if (rc) {
5359 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5360 rc);
5361 goto ibmvnic_init_fail;
5362 }
5363
5364 rc = ibmvnic_reset_init(adapter, false);
5365 if (rc && rc != EAGAIN)
5366 goto ibmvnic_init_fail;
5367 } while (rc == EAGAIN);
5368
5369 rc = init_stats_buffers(adapter);
5370 if (rc)
5371 goto ibmvnic_init_fail;
5372
5373 rc = init_stats_token(adapter);
5374 if (rc)
5375 goto ibmvnic_stats_fail;
5376
5377 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5378 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5379 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5380
5381 rc = device_create_file(&dev->dev, &dev_attr_failover);
5382 if (rc)
5383 goto ibmvnic_dev_file_err;
5384
5385 netif_carrier_off(netdev);
5386 rc = register_netdev(netdev);
5387 if (rc) {
5388 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5389 goto ibmvnic_register_fail;
5390 }
5391 dev_info(&dev->dev, "ibmvnic registered\n");
5392
5393 adapter->state = VNIC_PROBED;
5394
5395 adapter->wait_for_reset = false;
5396 adapter->last_reset_time = jiffies;
5397 return 0;
5398
5399 ibmvnic_register_fail:
5400 device_remove_file(&dev->dev, &dev_attr_failover);
5401
5402 ibmvnic_dev_file_err:
5403 release_stats_token(adapter);
5404
5405 ibmvnic_stats_fail:
5406 release_stats_buffers(adapter);
5407
5408 ibmvnic_init_fail:
5409 release_sub_crqs(adapter, 1);
5410 release_crq_queue(adapter);
5411 mutex_destroy(&adapter->fw_lock);
5412 free_netdev(netdev);
5413
5414 return rc;
5415 }
5416
ibmvnic_remove(struct vio_dev * dev)5417 static int ibmvnic_remove(struct vio_dev *dev)
5418 {
5419 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5420 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5421 unsigned long flags;
5422
5423 spin_lock_irqsave(&adapter->state_lock, flags);
5424
5425 /* If ibmvnic_reset() is scheduling a reset, wait for it to
5426 * finish. Then, set the state to REMOVING to prevent it from
5427 * scheduling any more work and to have reset functions ignore
5428 * any resets that have already been scheduled. Drop the lock
5429 * after setting state, so __ibmvnic_reset() which is called
5430 * from the flush_work() below, can make progress.
5431 */
5432 spin_lock(&adapter->rwi_lock);
5433 adapter->state = VNIC_REMOVING;
5434 spin_unlock(&adapter->rwi_lock);
5435
5436 spin_unlock_irqrestore(&adapter->state_lock, flags);
5437
5438 flush_work(&adapter->ibmvnic_reset);
5439 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5440
5441 rtnl_lock();
5442 unregister_netdevice(netdev);
5443
5444 release_resources(adapter);
5445 release_sub_crqs(adapter, 1);
5446 release_crq_queue(adapter);
5447
5448 release_stats_token(adapter);
5449 release_stats_buffers(adapter);
5450
5451 adapter->state = VNIC_REMOVED;
5452
5453 rtnl_unlock();
5454 mutex_destroy(&adapter->fw_lock);
5455 device_remove_file(&dev->dev, &dev_attr_failover);
5456 free_netdev(netdev);
5457 dev_set_drvdata(&dev->dev, NULL);
5458
5459 return 0;
5460 }
5461
failover_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)5462 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5463 const char *buf, size_t count)
5464 {
5465 struct net_device *netdev = dev_get_drvdata(dev);
5466 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5467 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5468 __be64 session_token;
5469 long rc;
5470
5471 if (!sysfs_streq(buf, "1"))
5472 return -EINVAL;
5473
5474 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5475 H_GET_SESSION_TOKEN, 0, 0, 0);
5476 if (rc) {
5477 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5478 rc);
5479 return -EINVAL;
5480 }
5481
5482 session_token = (__be64)retbuf[0];
5483 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5484 be64_to_cpu(session_token));
5485 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5486 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5487 if (rc) {
5488 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5489 rc);
5490 return -EINVAL;
5491 }
5492
5493 return count;
5494 }
5495
5496 static DEVICE_ATTR_WO(failover);
5497
ibmvnic_get_desired_dma(struct vio_dev * vdev)5498 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5499 {
5500 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5501 struct ibmvnic_adapter *adapter;
5502 struct iommu_table *tbl;
5503 unsigned long ret = 0;
5504 int i;
5505
5506 tbl = get_iommu_table_base(&vdev->dev);
5507
5508 /* netdev inits at probe time along with the structures we need below*/
5509 if (!netdev)
5510 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5511
5512 adapter = netdev_priv(netdev);
5513
5514 ret += PAGE_SIZE; /* the crq message queue */
5515 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5516
5517 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5518 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5519
5520 for (i = 0; i < adapter->num_active_rx_pools; i++)
5521 ret += adapter->rx_pool[i].size *
5522 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5523
5524 return ret;
5525 }
5526
ibmvnic_resume(struct device * dev)5527 static int ibmvnic_resume(struct device *dev)
5528 {
5529 struct net_device *netdev = dev_get_drvdata(dev);
5530 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5531
5532 if (adapter->state != VNIC_OPEN)
5533 return 0;
5534
5535 tasklet_schedule(&adapter->tasklet);
5536
5537 return 0;
5538 }
5539
5540 static const struct vio_device_id ibmvnic_device_table[] = {
5541 {"network", "IBM,vnic"},
5542 {"", "" }
5543 };
5544 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5545
5546 static const struct dev_pm_ops ibmvnic_pm_ops = {
5547 .resume = ibmvnic_resume
5548 };
5549
5550 static struct vio_driver ibmvnic_driver = {
5551 .id_table = ibmvnic_device_table,
5552 .probe = ibmvnic_probe,
5553 .remove = ibmvnic_remove,
5554 .get_desired_dma = ibmvnic_get_desired_dma,
5555 .name = ibmvnic_driver_name,
5556 .pm = &ibmvnic_pm_ops,
5557 };
5558
5559 /* module functions */
ibmvnic_module_init(void)5560 static int __init ibmvnic_module_init(void)
5561 {
5562 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5563 IBMVNIC_DRIVER_VERSION);
5564
5565 return vio_register_driver(&ibmvnic_driver);
5566 }
5567
ibmvnic_module_exit(void)5568 static void __exit ibmvnic_module_exit(void)
5569 {
5570 vio_unregister_driver(&ibmvnic_driver);
5571 }
5572
5573 module_init(ibmvnic_module_init);
5574 module_exit(ibmvnic_module_exit);
5575