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WIP FPC-III support
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_main.c
blobf5fc7f518f8afea5e05504400450422b0905bc42
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic iSCSI Offload Driver
4 * Copyright (c) 2016 Cavium Inc.
5 */
6
7 #include <linux/module.h>
8 #include <linux/pci.h>
9 #include <linux/kernel.h>
10 #include <linux/if_arp.h>
11 #include <scsi/iscsi_if.h>
12 #include <linux/inet.h>
13 #include <net/arp.h>
14 #include <linux/list.h>
15 #include <linux/kthread.h>
16 #include <linux/mm.h>
17 #include <linux/if_vlan.h>
18 #include <linux/cpu.h>
19 #include <linux/iscsi_boot_sysfs.h>
20
21 #include <scsi/scsi_cmnd.h>
22 #include <scsi/scsi_device.h>
23 #include <scsi/scsi_eh.h>
24 #include <scsi/scsi_host.h>
25 #include <scsi/scsi.h>
26
27 #include "qedi.h"
28 #include "qedi_gbl.h"
29 #include "qedi_iscsi.h"
30
31 static uint qedi_qed_debug;
32 module_param(qedi_qed_debug, uint, 0644);
33 MODULE_PARM_DESC(qedi_qed_debug, " QED debug level 0 (default)");
34
35 static uint qedi_fw_debug;
36 module_param(qedi_fw_debug, uint, 0644);
37 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
38
39 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
40 module_param(qedi_dbg_log, uint, 0644);
41 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
42
43 uint qedi_io_tracing;
44 module_param(qedi_io_tracing, uint, 0644);
45 MODULE_PARM_DESC(qedi_io_tracing,
46 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
47
48 static uint qedi_ll2_buf_size = 0x400;
49 module_param(qedi_ll2_buf_size, uint, 0644);
50 MODULE_PARM_DESC(qedi_ll2_buf_size,
51 "parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400.");
52
53 static uint qedi_flags_override;
54 module_param(qedi_flags_override, uint, 0644);
55 MODULE_PARM_DESC(qedi_flags_override, "Disable/Enable MFW error flags bits action.");
56
57 const struct qed_iscsi_ops *qedi_ops;
58 static struct scsi_transport_template *qedi_scsi_transport;
59 static struct pci_driver qedi_pci_driver;
60 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
61 static LIST_HEAD(qedi_udev_list);
62 /* Static function declaration */
63 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
64 static void qedi_free_global_queues(struct qedi_ctx *qedi);
65 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
66 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
67 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
68 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
69 static void qedi_recovery_handler(struct work_struct *work);
70 static void qedi_schedule_hw_err_handler(void *dev,
71 enum qed_hw_err_type err_type);
72
73 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
74 {
75 struct qedi_ctx *qedi;
76 struct qedi_endpoint *qedi_ep;
77 struct iscsi_eqe_data *data;
78 int rval = 0;
79
80 if (!context || !fw_handle) {
81 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
82 return -EINVAL;
83 }
84
85 qedi = (struct qedi_ctx *)context;
86 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
87 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
88
89 data = (struct iscsi_eqe_data *)fw_handle;
90 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
91 "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
92 data->icid, data->conn_id, data->error_code,
93 data->error_pdu_opcode_reserved);
94
95 qedi_ep = qedi->ep_tbl[data->icid];
96
97 if (!qedi_ep) {
98 QEDI_WARN(&qedi->dbg_ctx,
99 "Cannot process event, ep already disconnected, cid=0x%x\n",
100 data->icid);
101 WARN_ON(1);
102 return -ENODEV;
103 }
104
105 switch (fw_event_code) {
106 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
107 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
108 qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
109
110 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
111 break;
112 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
113 qedi_ep->state = EP_STATE_DISCONN_COMPL;
114 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
115 break;
116 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
117 qedi_process_iscsi_error(qedi_ep, data);
118 break;
119 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
120 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
121 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
122 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
123 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
124 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
125 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
126 qedi_process_tcp_error(qedi_ep, data);
127 break;
128 default:
129 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
130 fw_event_code);
131 }
132
133 return rval;
134 }
135
136 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
137 {
138 struct qedi_uio_dev *udev = uinfo->priv;
139 struct qedi_ctx *qedi = udev->qedi;
140
141 if (!capable(CAP_NET_ADMIN))
142 return -EPERM;
143
144 if (udev->uio_dev != -1)
145 return -EBUSY;
146
147 rtnl_lock();
148 udev->uio_dev = iminor(inode);
149 qedi_reset_uio_rings(udev);
150 set_bit(UIO_DEV_OPENED, &qedi->flags);
151 rtnl_unlock();
152
153 return 0;
154 }
155
156 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
157 {
158 struct qedi_uio_dev *udev = uinfo->priv;
159 struct qedi_ctx *qedi = udev->qedi;
160
161 udev->uio_dev = -1;
162 clear_bit(UIO_DEV_OPENED, &qedi->flags);
163 qedi_ll2_free_skbs(qedi);
164 return 0;
165 }
166
167 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
168 {
169 if (udev->uctrl) {
170 free_page((unsigned long)udev->uctrl);
171 udev->uctrl = NULL;
172 }
173
174 if (udev->ll2_ring) {
175 free_page((unsigned long)udev->ll2_ring);
176 udev->ll2_ring = NULL;
177 }
178
179 if (udev->ll2_buf) {
180 free_pages((unsigned long)udev->ll2_buf, 2);
181 udev->ll2_buf = NULL;
182 }
183 }
184
185 static void __qedi_free_uio(struct qedi_uio_dev *udev)
186 {
187 uio_unregister_device(&udev->qedi_uinfo);
188
189 __qedi_free_uio_rings(udev);
190
191 pci_dev_put(udev->pdev);
192 kfree(udev);
193 }
194
195 static void qedi_free_uio(struct qedi_uio_dev *udev)
196 {
197 if (!udev)
198 return;
199
200 list_del_init(&udev->list);
201 __qedi_free_uio(udev);
202 }
203
204 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
205 {
206 struct qedi_ctx *qedi = NULL;
207 struct qedi_uio_ctrl *uctrl = NULL;
208
209 qedi = udev->qedi;
210 uctrl = udev->uctrl;
211
212 spin_lock_bh(&qedi->ll2_lock);
213 uctrl->host_rx_cons = 0;
214 uctrl->hw_rx_prod = 0;
215 uctrl->hw_rx_bd_prod = 0;
216 uctrl->host_rx_bd_cons = 0;
217
218 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
219 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
220 spin_unlock_bh(&qedi->ll2_lock);
221 }
222
223 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
224 {
225 int rc = 0;
226
227 if (udev->ll2_ring || udev->ll2_buf)
228 return rc;
229
230 /* Memory for control area. */
231 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
232 if (!udev->uctrl)
233 return -ENOMEM;
234
235 /* Allocating memory for LL2 ring */
236 udev->ll2_ring_size = QEDI_PAGE_SIZE;
237 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
238 if (!udev->ll2_ring) {
239 rc = -ENOMEM;
240 goto exit_alloc_ring;
241 }
242
243 /* Allocating memory for Tx/Rx pkt buffer */
244 udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
245 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
246 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
247 __GFP_ZERO, 2);
248 if (!udev->ll2_buf) {
249 rc = -ENOMEM;
250 goto exit_alloc_buf;
251 }
252 return rc;
253
254 exit_alloc_buf:
255 free_page((unsigned long)udev->ll2_ring);
256 udev->ll2_ring = NULL;
257 exit_alloc_ring:
258 return rc;
259 }
260
261 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
262 {
263 struct qedi_uio_dev *udev = NULL;
264 int rc = 0;
265
266 list_for_each_entry(udev, &qedi_udev_list, list) {
267 if (udev->pdev == qedi->pdev) {
268 udev->qedi = qedi;
269 if (__qedi_alloc_uio_rings(udev)) {
270 udev->qedi = NULL;
271 return -ENOMEM;
272 }
273 qedi->udev = udev;
274 return 0;
275 }
276 }
277
278 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
279 if (!udev) {
280 rc = -ENOMEM;
281 goto err_udev;
282 }
283
284 udev->uio_dev = -1;
285
286 udev->qedi = qedi;
287 udev->pdev = qedi->pdev;
288
289 rc = __qedi_alloc_uio_rings(udev);
290 if (rc)
291 goto err_uctrl;
292
293 list_add(&udev->list, &qedi_udev_list);
294
295 pci_dev_get(udev->pdev);
296 qedi->udev = udev;
297
298 udev->tx_pkt = udev->ll2_buf;
299 udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
300 return 0;
301
302 err_uctrl:
303 kfree(udev);
304 err_udev:
305 return -ENOMEM;
306 }
307
308 static int qedi_init_uio(struct qedi_ctx *qedi)
309 {
310 struct qedi_uio_dev *udev = qedi->udev;
311 struct uio_info *uinfo;
312 int ret = 0;
313
314 if (!udev)
315 return -ENOMEM;
316
317 uinfo = &udev->qedi_uinfo;
318
319 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
320 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
321 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
322
323 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
324 uinfo->mem[1].size = udev->ll2_ring_size;
325 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
326
327 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
328 uinfo->mem[2].size = udev->ll2_buf_size;
329 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
330
331 uinfo->name = "qedi_uio";
332 uinfo->version = QEDI_MODULE_VERSION;
333 uinfo->irq = UIO_IRQ_CUSTOM;
334
335 uinfo->open = qedi_uio_open;
336 uinfo->release = qedi_uio_close;
337
338 if (udev->uio_dev == -1) {
339 if (!uinfo->priv) {
340 uinfo->priv = udev;
341
342 ret = uio_register_device(&udev->pdev->dev, uinfo);
343 if (ret) {
344 QEDI_ERR(&qedi->dbg_ctx,
345 "UIO registration failed\n");
346 }
347 }
348 }
349
350 return ret;
351 }
352
353 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
354 struct qed_sb_info *sb_info, u16 sb_id)
355 {
356 struct status_block_e4 *sb_virt;
357 dma_addr_t sb_phys;
358 int ret;
359
360 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
361 sizeof(struct status_block_e4), &sb_phys,
362 GFP_KERNEL);
363 if (!sb_virt) {
364 QEDI_ERR(&qedi->dbg_ctx,
365 "Status block allocation failed for id = %d.\n",
366 sb_id);
367 return -ENOMEM;
368 }
369
370 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
371 sb_id, QED_SB_TYPE_STORAGE);
372 if (ret) {
373 QEDI_ERR(&qedi->dbg_ctx,
374 "Status block initialization failed for id = %d.\n",
375 sb_id);
376 return ret;
377 }
378
379 return 0;
380 }
381
382 static void qedi_free_sb(struct qedi_ctx *qedi)
383 {
384 struct qed_sb_info *sb_info;
385 int id;
386
387 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
388 sb_info = &qedi->sb_array[id];
389 if (sb_info->sb_virt)
390 dma_free_coherent(&qedi->pdev->dev,
391 sizeof(*sb_info->sb_virt),
392 (void *)sb_info->sb_virt,
393 sb_info->sb_phys);
394 }
395 }
396
397 static void qedi_free_fp(struct qedi_ctx *qedi)
398 {
399 kfree(qedi->fp_array);
400 kfree(qedi->sb_array);
401 }
402
403 static void qedi_destroy_fp(struct qedi_ctx *qedi)
404 {
405 qedi_free_sb(qedi);
406 qedi_free_fp(qedi);
407 }
408
409 static int qedi_alloc_fp(struct qedi_ctx *qedi)
410 {
411 int ret = 0;
412
413 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
414 sizeof(struct qedi_fastpath), GFP_KERNEL);
415 if (!qedi->fp_array) {
416 QEDI_ERR(&qedi->dbg_ctx,
417 "fastpath fp array allocation failed.\n");
418 return -ENOMEM;
419 }
420
421 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
422 sizeof(struct qed_sb_info), GFP_KERNEL);
423 if (!qedi->sb_array) {
424 QEDI_ERR(&qedi->dbg_ctx,
425 "fastpath sb array allocation failed.\n");
426 ret = -ENOMEM;
427 goto free_fp;
428 }
429
430 return ret;
431
432 free_fp:
433 qedi_free_fp(qedi);
434 return ret;
435 }
436
437 static void qedi_int_fp(struct qedi_ctx *qedi)
438 {
439 struct qedi_fastpath *fp;
440 int id;
441
442 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
443 sizeof(*qedi->fp_array));
444 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
445 sizeof(*qedi->sb_array));
446
447 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
448 fp = &qedi->fp_array[id];
449 fp->sb_info = &qedi->sb_array[id];
450 fp->sb_id = id;
451 fp->qedi = qedi;
452 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
453 "qedi", id);
454
455 /* fp_array[i] ---- irq cookie
456 * So init data which is needed in int ctx
457 */
458 }
459 }
460
461 static int qedi_prepare_fp(struct qedi_ctx *qedi)
462 {
463 struct qedi_fastpath *fp;
464 int id, ret = 0;
465
466 ret = qedi_alloc_fp(qedi);
467 if (ret)
468 goto err;
469
470 qedi_int_fp(qedi);
471
472 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
473 fp = &qedi->fp_array[id];
474 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
475 if (ret) {
476 QEDI_ERR(&qedi->dbg_ctx,
477 "SB allocation and initialization failed.\n");
478 ret = -EIO;
479 goto err_init;
480 }
481 }
482
483 return 0;
484
485 err_init:
486 qedi_free_sb(qedi);
487 qedi_free_fp(qedi);
488 err:
489 return ret;
490 }
491
492 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
493 {
494 int i;
495
496 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
497 sizeof(u32), GFP_KERNEL);
498 if (!qedi->cid_que.cid_que_base)
499 return -ENOMEM;
500
501 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
502 sizeof(struct qedi_conn *),
503 GFP_KERNEL);
504 if (!qedi->cid_que.conn_cid_tbl) {
505 kfree(qedi->cid_que.cid_que_base);
506 qedi->cid_que.cid_que_base = NULL;
507 return -ENOMEM;
508 }
509
510 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
511 qedi->cid_que.cid_q_prod_idx = 0;
512 qedi->cid_que.cid_q_cons_idx = 0;
513 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
514 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
515
516 for (i = 0; i < qedi->max_active_conns; i++) {
517 qedi->cid_que.cid_que[i] = i;
518 qedi->cid_que.conn_cid_tbl[i] = NULL;
519 }
520
521 return 0;
522 }
523
524 static void qedi_release_cid_que(struct qedi_ctx *qedi)
525 {
526 kfree(qedi->cid_que.cid_que_base);
527 qedi->cid_que.cid_que_base = NULL;
528
529 kfree(qedi->cid_que.conn_cid_tbl);
530 qedi->cid_que.conn_cid_tbl = NULL;
531 }
532
533 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
534 u16 start_id, u16 next)
535 {
536 id_tbl->start = start_id;
537 id_tbl->max = size;
538 id_tbl->next = next;
539 spin_lock_init(&id_tbl->lock);
540 id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL);
541 if (!id_tbl->table)
542 return -ENOMEM;
543
544 return 0;
545 }
546
547 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
548 {
549 kfree(id_tbl->table);
550 id_tbl->table = NULL;
551 }
552
553 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
554 {
555 int ret = -1;
556
557 id -= id_tbl->start;
558 if (id >= id_tbl->max)
559 return ret;
560
561 spin_lock(&id_tbl->lock);
562 if (!test_bit(id, id_tbl->table)) {
563 set_bit(id, id_tbl->table);
564 ret = 0;
565 }
566 spin_unlock(&id_tbl->lock);
567 return ret;
568 }
569
570 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
571 {
572 u16 id;
573
574 spin_lock(&id_tbl->lock);
575 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
576 if (id >= id_tbl->max) {
577 id = QEDI_LOCAL_PORT_INVALID;
578 if (id_tbl->next != 0) {
579 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
580 if (id >= id_tbl->next)
581 id = QEDI_LOCAL_PORT_INVALID;
582 }
583 }
584
585 if (id < id_tbl->max) {
586 set_bit(id, id_tbl->table);
587 id_tbl->next = (id + 1) & (id_tbl->max - 1);
588 id += id_tbl->start;
589 }
590
591 spin_unlock(&id_tbl->lock);
592
593 return id;
594 }
595
596 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
597 {
598 if (id == QEDI_LOCAL_PORT_INVALID)
599 return;
600
601 id -= id_tbl->start;
602 if (id >= id_tbl->max)
603 return;
604
605 clear_bit(id, id_tbl->table);
606 }
607
608 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
609 {
610 kfree(qedi->ep_tbl);
611 qedi->ep_tbl = NULL;
612 qedi_free_id_tbl(&qedi->lcl_port_tbl);
613 }
614
615 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
616 {
617 u16 port_id;
618
619 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
620 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
621 if (!qedi->ep_tbl)
622 return -ENOMEM;
623 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
624 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
625 QEDI_LOCAL_PORT_MIN, port_id)) {
626 qedi_cm_free_mem(qedi);
627 return -ENOMEM;
628 }
629
630 return 0;
631 }
632
633 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
634 {
635 struct Scsi_Host *shost;
636 struct qedi_ctx *qedi = NULL;
637
638 shost = iscsi_host_alloc(&qedi_host_template,
639 sizeof(struct qedi_ctx), 0);
640 if (!shost) {
641 QEDI_ERR(NULL, "Could not allocate shost\n");
642 goto exit_setup_shost;
643 }
644
645 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
646 shost->max_channel = 0;
647 shost->max_lun = ~0;
648 shost->max_cmd_len = 16;
649 shost->transportt = qedi_scsi_transport;
650
651 qedi = iscsi_host_priv(shost);
652 memset(qedi, 0, sizeof(*qedi));
653 qedi->shost = shost;
654 qedi->dbg_ctx.host_no = shost->host_no;
655 qedi->pdev = pdev;
656 qedi->dbg_ctx.pdev = pdev;
657 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
658 qedi->max_sqes = QEDI_SQ_SIZE;
659
660 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
661
662 pci_set_drvdata(pdev, qedi);
663
664 exit_setup_shost:
665 return qedi;
666 }
667
668 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
669 {
670 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
671 struct skb_work_list *work;
672 struct ethhdr *eh;
673
674 if (!qedi) {
675 QEDI_ERR(NULL, "qedi is NULL\n");
676 return -1;
677 }
678
679 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
680 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
681 "UIO DEV is not opened\n");
682 kfree_skb(skb);
683 return 0;
684 }
685
686 eh = (struct ethhdr *)skb->data;
687 /* Undo VLAN encapsulation */
688 if (eh->h_proto == htons(ETH_P_8021Q)) {
689 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
690 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
691 skb_reset_mac_header(skb);
692 }
693
694 /* Filter out non FIP/FCoE frames here to free them faster */
695 if (eh->h_proto != htons(ETH_P_ARP) &&
696 eh->h_proto != htons(ETH_P_IP) &&
697 eh->h_proto != htons(ETH_P_IPV6)) {
698 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
699 "Dropping frame ethertype [0x%x] len [0x%x].\n",
700 eh->h_proto, skb->len);
701 kfree_skb(skb);
702 return 0;
703 }
704
705 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
706 "Allowed frame ethertype [0x%x] len [0x%x].\n",
707 eh->h_proto, skb->len);
708
709 work = kzalloc(sizeof(*work), GFP_ATOMIC);
710 if (!work) {
711 QEDI_WARN(&qedi->dbg_ctx,
712 "Could not allocate work so dropping frame.\n");
713 kfree_skb(skb);
714 return 0;
715 }
716
717 INIT_LIST_HEAD(&work->list);
718 work->skb = skb;
719
720 if (skb_vlan_tag_present(skb))
721 work->vlan_id = skb_vlan_tag_get(skb);
722
723 if (work->vlan_id)
724 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
725
726 spin_lock_bh(&qedi->ll2_lock);
727 list_add_tail(&work->list, &qedi->ll2_skb_list);
728 spin_unlock_bh(&qedi->ll2_lock);
729
730 wake_up_process(qedi->ll2_recv_thread);
731
732 return 0;
733 }
734
735 /* map this skb to iscsiuio mmaped region */
736 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
737 u16 vlan_id)
738 {
739 struct qedi_uio_dev *udev = NULL;
740 struct qedi_uio_ctrl *uctrl = NULL;
741 struct qedi_rx_bd rxbd;
742 struct qedi_rx_bd *p_rxbd;
743 u32 rx_bd_prod;
744 void *pkt;
745 int len = 0;
746 u32 prod;
747
748 if (!qedi) {
749 QEDI_ERR(NULL, "qedi is NULL\n");
750 return -1;
751 }
752
753 udev = qedi->udev;
754 uctrl = udev->uctrl;
755
756 ++uctrl->hw_rx_prod_cnt;
757 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
758
759 pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
760 len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
761 memcpy(pkt, skb->data, len);
762
763 memset(&rxbd, 0, sizeof(rxbd));
764 rxbd.rx_pkt_index = prod;
765 rxbd.rx_pkt_len = len;
766 rxbd.vlan_id = vlan_id;
767
768 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
769 rx_bd_prod = uctrl->hw_rx_bd_prod;
770 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
771 p_rxbd += rx_bd_prod;
772
773 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
774
775 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
776 "hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
777 uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
778 rxbd.rx_pkt_index, rxbd.rx_pkt_len);
779 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
780 "host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
781 uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
782
783 uctrl->hw_rx_prod = prod;
784
785 /* notify the iscsiuio about new packet */
786 uio_event_notify(&udev->qedi_uinfo);
787
788 return 0;
789 }
790
791 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
792 {
793 struct skb_work_list *work, *work_tmp;
794
795 spin_lock_bh(&qedi->ll2_lock);
796 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
797 list_del(&work->list);
798 kfree_skb(work->skb);
799 kfree(work);
800 }
801 spin_unlock_bh(&qedi->ll2_lock);
802 }
803
804 static int qedi_ll2_recv_thread(void *arg)
805 {
806 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
807 struct skb_work_list *work, *work_tmp;
808
809 set_user_nice(current, -20);
810
811 while (!kthread_should_stop()) {
812 spin_lock_bh(&qedi->ll2_lock);
813 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
814 list) {
815 list_del(&work->list);
816 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
817 kfree_skb(work->skb);
818 kfree(work);
819 }
820 set_current_state(TASK_INTERRUPTIBLE);
821 spin_unlock_bh(&qedi->ll2_lock);
822 schedule();
823 }
824
825 __set_current_state(TASK_RUNNING);
826 return 0;
827 }
828
829 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
830 {
831 u8 num_sq_pages;
832 u32 log_page_size;
833 int rval = 0;
834
835
836 num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE;
837
838 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
839
840 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
841 "Number of CQ count is %d\n", qedi->num_queues);
842
843 memset(&qedi->pf_params.iscsi_pf_params, 0,
844 sizeof(qedi->pf_params.iscsi_pf_params));
845
846 qedi->p_cpuq = dma_alloc_coherent(&qedi->pdev->dev,
847 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
848 &qedi->hw_p_cpuq, GFP_KERNEL);
849 if (!qedi->p_cpuq) {
850 QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n");
851 rval = -1;
852 goto err_alloc_mem;
853 }
854
855 rval = qedi_alloc_global_queues(qedi);
856 if (rval) {
857 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
858 rval = -1;
859 goto err_alloc_mem;
860 }
861
862 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
863 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
864 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
865 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
866 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
867 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
868 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
869 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
870 qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
871 qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
872
873 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
874 if ((1 << log_page_size) == QEDI_PAGE_SIZE)
875 break;
876 }
877 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
878
879 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
880 (u64)qedi->hw_p_cpuq;
881
882 /* RQ BDQ initializations.
883 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
884 * rqe_log_size: 8 for 256B RQE
885 */
886 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
887 /* BDQ address and size */
888 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
889 qedi->bdq_pbl_list_dma;
890 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
891 qedi->bdq_pbl_list_num_entries;
892 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
893
894 /* cq_num_entries: num_tasks + rq_num_entries */
895 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
896
897 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
898 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
899
900 err_alloc_mem:
901 return rval;
902 }
903
904 /* Free DMA coherent memory for array of queue pointers we pass to qed */
905 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
906 {
907 size_t size = 0;
908
909 if (qedi->p_cpuq) {
910 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
911 dma_free_coherent(&qedi->pdev->dev, size, qedi->p_cpuq,
912 qedi->hw_p_cpuq);
913 }
914
915 qedi_free_global_queues(qedi);
916
917 kfree(qedi->global_queues);
918 }
919
920 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
921 struct qedi_boot_target *tgt, u8 index)
922 {
923 u32 ipv6_en;
924
925 ipv6_en = !!(block->generic.ctrl_flags &
926 NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
927
928 snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s",
929 block->target[index].target_name.byte);
930
931 tgt->ipv6_en = ipv6_en;
932
933 if (ipv6_en)
934 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
935 block->target[index].ipv6_addr.byte);
936 else
937 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
938 block->target[index].ipv4_addr.byte);
939 }
940
941 static int qedi_find_boot_info(struct qedi_ctx *qedi,
942 struct qed_mfw_tlv_iscsi *iscsi,
943 struct nvm_iscsi_block *block)
944 {
945 struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
946 u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
947 struct iscsi_cls_session *cls_sess;
948 struct iscsi_cls_conn *cls_conn;
949 struct qedi_conn *qedi_conn;
950 struct iscsi_session *sess;
951 struct iscsi_conn *conn;
952 char ep_ip_addr[64];
953 int i, ret = 0;
954
955 pri_ctrl_flags = !!(block->target[0].ctrl_flags &
956 NVM_ISCSI_CFG_TARGET_ENABLED);
957 if (pri_ctrl_flags) {
958 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
959 if (!pri_tgt)
960 return -1;
961 qedi_get_boot_tgt_info(block, pri_tgt, 0);
962 }
963
964 sec_ctrl_flags = !!(block->target[1].ctrl_flags &
965 NVM_ISCSI_CFG_TARGET_ENABLED);
966 if (sec_ctrl_flags) {
967 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
968 if (!sec_tgt) {
969 ret = -1;
970 goto free_tgt;
971 }
972 qedi_get_boot_tgt_info(block, sec_tgt, 1);
973 }
974
975 for (i = 0; i < qedi->max_active_conns; i++) {
976 qedi_conn = qedi_get_conn_from_id(qedi, i);
977 if (!qedi_conn)
978 continue;
979
980 if (qedi_conn->ep->ip_type == TCP_IPV4)
981 snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
982 qedi_conn->ep->dst_addr);
983 else
984 snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
985 qedi_conn->ep->dst_addr);
986
987 cls_conn = qedi_conn->cls_conn;
988 conn = cls_conn->dd_data;
989 cls_sess = iscsi_conn_to_session(cls_conn);
990 sess = cls_sess->dd_data;
991
992 if (!iscsi_is_session_online(cls_sess))
993 continue;
994
995 if (!sess->targetname)
996 continue;
997
998 if (pri_ctrl_flags) {
999 if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
1000 !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
1001 found = 1;
1002 break;
1003 }
1004 }
1005
1006 if (sec_ctrl_flags) {
1007 if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
1008 !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
1009 found = 1;
1010 break;
1011 }
1012 }
1013 }
1014
1015 if (found) {
1016 if (conn->hdrdgst_en) {
1017 iscsi->header_digest_set = true;
1018 iscsi->header_digest = 1;
1019 }
1020
1021 if (conn->datadgst_en) {
1022 iscsi->data_digest_set = true;
1023 iscsi->data_digest = 1;
1024 }
1025 iscsi->boot_taget_portal_set = true;
1026 iscsi->boot_taget_portal = sess->tpgt;
1027
1028 } else {
1029 ret = -1;
1030 }
1031
1032 if (sec_ctrl_flags)
1033 kfree(sec_tgt);
1034 free_tgt:
1035 if (pri_ctrl_flags)
1036 kfree(pri_tgt);
1037
1038 return ret;
1039 }
1040
1041 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
1042 {
1043 struct qedi_ctx *qedi;
1044
1045 if (!dev) {
1046 QEDI_INFO(NULL, QEDI_LOG_EVT,
1047 "dev is NULL so ignoring get_generic_tlv_data request.\n");
1048 return;
1049 }
1050 qedi = (struct qedi_ctx *)dev;
1051
1052 memset(data, 0, sizeof(struct qed_generic_tlvs));
1053 ether_addr_copy(data->mac[0], qedi->mac);
1054 }
1055
1056 /*
1057 * Protocol TLV handler
1058 */
1059 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1060 {
1061 struct qed_mfw_tlv_iscsi *iscsi = data;
1062 struct qed_iscsi_stats *fw_iscsi_stats;
1063 struct nvm_iscsi_block *block = NULL;
1064 u32 chap_en = 0, mchap_en = 0;
1065 struct qedi_ctx *qedi = dev;
1066 int rval = 0;
1067
1068 fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1069 if (!fw_iscsi_stats) {
1070 QEDI_ERR(&qedi->dbg_ctx,
1071 "Could not allocate memory for fw_iscsi_stats.\n");
1072 goto exit_get_data;
1073 }
1074
1075 mutex_lock(&qedi->stats_lock);
1076 /* Query firmware for offload stats */
1077 qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1078 mutex_unlock(&qedi->stats_lock);
1079
1080 iscsi->rx_frames_set = true;
1081 iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1082 iscsi->rx_bytes_set = true;
1083 iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1084 iscsi->tx_frames_set = true;
1085 iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1086 iscsi->tx_bytes_set = true;
1087 iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1088 iscsi->frame_size_set = true;
1089 iscsi->frame_size = qedi->ll2_mtu;
1090 block = qedi_get_nvram_block(qedi);
1091 if (block) {
1092 chap_en = !!(block->generic.ctrl_flags &
1093 NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1094 mchap_en = !!(block->generic.ctrl_flags &
1095 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1096
1097 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1098 iscsi->auth_method = 1;
1099 if (chap_en)
1100 iscsi->auth_method = 2;
1101 if (mchap_en)
1102 iscsi->auth_method = 3;
1103
1104 iscsi->tx_desc_size_set = true;
1105 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1106 iscsi->rx_desc_size_set = true;
1107 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1108
1109 /* tpgt, hdr digest, data digest */
1110 rval = qedi_find_boot_info(qedi, iscsi, block);
1111 if (rval)
1112 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1113 "Boot target not set");
1114 }
1115
1116 kfree(fw_iscsi_stats);
1117 exit_get_data:
1118 return;
1119 }
1120
1121 void qedi_schedule_hw_err_handler(void *dev,
1122 enum qed_hw_err_type err_type)
1123 {
1124 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1125 unsigned long override_flags = qedi_flags_override;
1126
1127 if (override_flags && test_bit(QEDI_ERR_OVERRIDE_EN, &override_flags))
1128 qedi->qedi_err_flags = qedi_flags_override;
1129
1130 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1131 "HW error handler scheduled, err=%d err_flags=0x%x\n",
1132 err_type, qedi->qedi_err_flags);
1133
1134 switch (err_type) {
1135 case QED_HW_ERR_FAN_FAIL:
1136 schedule_delayed_work(&qedi->board_disable_work, 0);
1137 break;
1138 case QED_HW_ERR_MFW_RESP_FAIL:
1139 case QED_HW_ERR_HW_ATTN:
1140 case QED_HW_ERR_DMAE_FAIL:
1141 case QED_HW_ERR_RAMROD_FAIL:
1142 case QED_HW_ERR_FW_ASSERT:
1143 /* Prevent HW attentions from being reasserted */
1144 if (test_bit(QEDI_ERR_ATTN_CLR_EN, &qedi->qedi_err_flags))
1145 qedi_ops->common->attn_clr_enable(qedi->cdev, true);
1146
1147 if (err_type == QED_HW_ERR_RAMROD_FAIL &&
1148 test_bit(QEDI_ERR_IS_RECOVERABLE, &qedi->qedi_err_flags))
1149 qedi_ops->common->recovery_process(qedi->cdev);
1150
1151 break;
1152 default:
1153 break;
1154 }
1155 }
1156
1157 static void qedi_schedule_recovery_handler(void *dev)
1158 {
1159 struct qedi_ctx *qedi = dev;
1160
1161 QEDI_ERR(&qedi->dbg_ctx, "Recovery handler scheduled.\n");
1162
1163 if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags))
1164 return;
1165
1166 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1167
1168 schedule_delayed_work(&qedi->recovery_work, 0);
1169 }
1170
1171 static void qedi_set_conn_recovery(struct iscsi_cls_session *cls_session)
1172 {
1173 struct iscsi_session *session = cls_session->dd_data;
1174 struct iscsi_conn *conn = session->leadconn;
1175 struct qedi_conn *qedi_conn = conn->dd_data;
1176
1177 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1178 }
1179
1180 static void qedi_link_update(void *dev, struct qed_link_output *link)
1181 {
1182 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1183
1184 if (link->link_up) {
1185 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1186 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1187 } else {
1188 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1189 "Link Down event.\n");
1190 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1191 iscsi_host_for_each_session(qedi->shost, qedi_set_conn_recovery);
1192 }
1193 }
1194
1195 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1196 {
1197 .link_update = qedi_link_update,
1198 .schedule_recovery_handler = qedi_schedule_recovery_handler,
1199 .schedule_hw_err_handler = qedi_schedule_hw_err_handler,
1200 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1201 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1202 }
1203 };
1204
1205 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1206 u16 que_idx, struct qedi_percpu_s *p)
1207 {
1208 struct qedi_work *qedi_work;
1209 struct qedi_conn *q_conn;
1210 struct qedi_cmd *qedi_cmd;
1211 u32 iscsi_cid;
1212 int rc = 0;
1213
1214 iscsi_cid = cqe->cqe_common.conn_id;
1215 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1216 if (!q_conn) {
1217 QEDI_WARN(&qedi->dbg_ctx,
1218 "Session no longer exists for cid=0x%x!!\n",
1219 iscsi_cid);
1220 return -1;
1221 }
1222
1223 switch (cqe->cqe_common.cqe_type) {
1224 case ISCSI_CQE_TYPE_SOLICITED:
1225 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1226 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1227 if (!qedi_cmd) {
1228 rc = -1;
1229 break;
1230 }
1231 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1232 qedi_cmd->cqe_work.qedi = qedi;
1233 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1234 qedi_cmd->cqe_work.que_idx = que_idx;
1235 qedi_cmd->cqe_work.is_solicited = true;
1236 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1237 break;
1238 case ISCSI_CQE_TYPE_UNSOLICITED:
1239 case ISCSI_CQE_TYPE_DUMMY:
1240 case ISCSI_CQE_TYPE_TASK_CLEANUP:
1241 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1242 if (!qedi_work) {
1243 rc = -1;
1244 break;
1245 }
1246 INIT_LIST_HEAD(&qedi_work->list);
1247 qedi_work->qedi = qedi;
1248 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1249 qedi_work->que_idx = que_idx;
1250 qedi_work->is_solicited = false;
1251 list_add_tail(&qedi_work->list, &p->work_list);
1252 break;
1253 default:
1254 rc = -1;
1255 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1256 }
1257 return rc;
1258 }
1259
1260 static bool qedi_process_completions(struct qedi_fastpath *fp)
1261 {
1262 struct qedi_ctx *qedi = fp->qedi;
1263 struct qed_sb_info *sb_info = fp->sb_info;
1264 struct status_block_e4 *sb = sb_info->sb_virt;
1265 struct qedi_percpu_s *p = NULL;
1266 struct global_queue *que;
1267 u16 prod_idx;
1268 unsigned long flags;
1269 union iscsi_cqe *cqe;
1270 int cpu;
1271 int ret;
1272
1273 /* Get the current firmware producer index */
1274 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1275
1276 if (prod_idx >= QEDI_CQ_SIZE)
1277 prod_idx = prod_idx % QEDI_CQ_SIZE;
1278
1279 que = qedi->global_queues[fp->sb_id];
1280 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1281 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1282 que, prod_idx, que->cq_cons_idx, fp->sb_id);
1283
1284 qedi->intr_cpu = fp->sb_id;
1285 cpu = smp_processor_id();
1286 p = &per_cpu(qedi_percpu, cpu);
1287
1288 if (unlikely(!p->iothread))
1289 WARN_ON(1);
1290
1291 spin_lock_irqsave(&p->p_work_lock, flags);
1292 while (que->cq_cons_idx != prod_idx) {
1293 cqe = &que->cq[que->cq_cons_idx];
1294
1295 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1296 "cqe=%p prod_idx=%d cons_idx=%d.\n",
1297 cqe, prod_idx, que->cq_cons_idx);
1298
1299 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1300 if (ret)
1301 QEDI_WARN(&qedi->dbg_ctx,
1302 "Dropping CQE 0x%x for cid=0x%x.\n",
1303 que->cq_cons_idx, cqe->cqe_common.conn_id);
1304
1305 que->cq_cons_idx++;
1306 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1307 que->cq_cons_idx = 0;
1308 }
1309 wake_up_process(p->iothread);
1310 spin_unlock_irqrestore(&p->p_work_lock, flags);
1311
1312 return true;
1313 }
1314
1315 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1316 {
1317 struct qedi_ctx *qedi = fp->qedi;
1318 struct global_queue *que;
1319 struct qed_sb_info *sb_info = fp->sb_info;
1320 struct status_block_e4 *sb = sb_info->sb_virt;
1321 u16 prod_idx;
1322
1323 barrier();
1324
1325 /* Get the current firmware producer index */
1326 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1327
1328 /* Get the pointer to the global CQ this completion is on */
1329 que = qedi->global_queues[fp->sb_id];
1330
1331 /* prod idx wrap around uint16 */
1332 if (prod_idx >= QEDI_CQ_SIZE)
1333 prod_idx = prod_idx % QEDI_CQ_SIZE;
1334
1335 return (que->cq_cons_idx != prod_idx);
1336 }
1337
1338 /* MSI-X fastpath handler code */
1339 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1340 {
1341 struct qedi_fastpath *fp = dev_id;
1342 struct qedi_ctx *qedi = fp->qedi;
1343 bool wake_io_thread = true;
1344
1345 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1346
1347 process_again:
1348 wake_io_thread = qedi_process_completions(fp);
1349 if (wake_io_thread) {
1350 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1351 "process already running\n");
1352 }
1353
1354 if (!qedi_fp_has_work(fp))
1355 qed_sb_update_sb_idx(fp->sb_info);
1356
1357 /* Check for more work */
1358 rmb();
1359
1360 if (!qedi_fp_has_work(fp))
1361 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1362 else
1363 goto process_again;
1364
1365 return IRQ_HANDLED;
1366 }
1367
1368 /* simd handler for MSI/INTa */
1369 static void qedi_simd_int_handler(void *cookie)
1370 {
1371 /* Cookie is qedi_ctx struct */
1372 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1373
1374 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1375 }
1376
1377 #define QEDI_SIMD_HANDLER_NUM 0
1378 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1379 {
1380 int i;
1381 u16 idx;
1382
1383 if (qedi->int_info.msix_cnt) {
1384 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1385 idx = i * qedi->dev_info.common.num_hwfns +
1386 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1387
1388 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1389 "Freeing IRQ #%d vector_idx=%d.\n", i, idx);
1390
1391 synchronize_irq(qedi->int_info.msix[idx].vector);
1392 irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1393 NULL);
1394 free_irq(qedi->int_info.msix[idx].vector,
1395 &qedi->fp_array[i]);
1396 }
1397 } else {
1398 qedi_ops->common->simd_handler_clean(qedi->cdev,
1399 QEDI_SIMD_HANDLER_NUM);
1400 }
1401
1402 qedi->int_info.used_cnt = 0;
1403 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1404 }
1405
1406 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1407 {
1408 int i, rc, cpu;
1409 u16 idx;
1410
1411 cpu = cpumask_first(cpu_online_mask);
1412 for (i = 0; i < qedi->msix_count; i++) {
1413 idx = i * qedi->dev_info.common.num_hwfns +
1414 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1415
1416 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1417 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
1418 qedi->dev_info.common.num_hwfns,
1419 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
1420
1421 rc = request_irq(qedi->int_info.msix[idx].vector,
1422 qedi_msix_handler, 0, "qedi",
1423 &qedi->fp_array[i]);
1424 if (rc) {
1425 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1426 qedi_sync_free_irqs(qedi);
1427 return rc;
1428 }
1429 qedi->int_info.used_cnt++;
1430 rc = irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1431 get_cpu_mask(cpu));
1432 cpu = cpumask_next(cpu, cpu_online_mask);
1433 }
1434
1435 return 0;
1436 }
1437
1438 static int qedi_setup_int(struct qedi_ctx *qedi)
1439 {
1440 int rc = 0;
1441
1442 rc = qedi_ops->common->set_fp_int(qedi->cdev, qedi->num_queues);
1443 if (rc < 0)
1444 goto exit_setup_int;
1445
1446 qedi->msix_count = rc;
1447
1448 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1449 if (rc)
1450 goto exit_setup_int;
1451
1452 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1453 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1454 qedi->int_info.msix_cnt, num_online_cpus());
1455
1456 if (qedi->int_info.msix_cnt) {
1457 rc = qedi_request_msix_irq(qedi);
1458 goto exit_setup_int;
1459 } else {
1460 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1461 QEDI_SIMD_HANDLER_NUM,
1462 qedi_simd_int_handler);
1463 qedi->int_info.used_cnt = 1;
1464 }
1465
1466 exit_setup_int:
1467 return rc;
1468 }
1469
1470 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1471 {
1472 if (qedi->iscsi_image)
1473 dma_free_coherent(&qedi->pdev->dev,
1474 sizeof(struct qedi_nvm_iscsi_image),
1475 qedi->iscsi_image, qedi->nvm_buf_dma);
1476 }
1477
1478 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1479 {
1480 qedi->iscsi_image = dma_alloc_coherent(&qedi->pdev->dev,
1481 sizeof(struct qedi_nvm_iscsi_image),
1482 &qedi->nvm_buf_dma, GFP_KERNEL);
1483 if (!qedi->iscsi_image) {
1484 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1485 return -ENOMEM;
1486 }
1487 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1488 "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image,
1489 qedi->nvm_buf_dma);
1490
1491 return 0;
1492 }
1493
1494 static void qedi_free_bdq(struct qedi_ctx *qedi)
1495 {
1496 int i;
1497
1498 if (qedi->bdq_pbl_list)
1499 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
1500 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1501
1502 if (qedi->bdq_pbl)
1503 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1504 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1505
1506 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1507 if (qedi->bdq[i].buf_addr) {
1508 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1509 qedi->bdq[i].buf_addr,
1510 qedi->bdq[i].buf_dma);
1511 }
1512 }
1513 }
1514
1515 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1516 {
1517 int i;
1518 struct global_queue **gl = qedi->global_queues;
1519
1520 for (i = 0; i < qedi->num_queues; i++) {
1521 if (!gl[i])
1522 continue;
1523
1524 if (gl[i]->cq)
1525 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1526 gl[i]->cq, gl[i]->cq_dma);
1527 if (gl[i]->cq_pbl)
1528 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1529 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1530
1531 kfree(gl[i]);
1532 }
1533 qedi_free_bdq(qedi);
1534 qedi_free_nvm_iscsi_cfg(qedi);
1535 }
1536
1537 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1538 {
1539 int i;
1540 struct scsi_bd *pbl;
1541 u64 *list;
1542 dma_addr_t page;
1543
1544 /* Alloc dma memory for BDQ buffers */
1545 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1546 qedi->bdq[i].buf_addr =
1547 dma_alloc_coherent(&qedi->pdev->dev,
1548 QEDI_BDQ_BUF_SIZE,
1549 &qedi->bdq[i].buf_dma,
1550 GFP_KERNEL);
1551 if (!qedi->bdq[i].buf_addr) {
1552 QEDI_ERR(&qedi->dbg_ctx,
1553 "Could not allocate BDQ buffer %d.\n", i);
1554 return -ENOMEM;
1555 }
1556 }
1557
1558 /* Alloc dma memory for BDQ page buffer list */
1559 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1560 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, QEDI_PAGE_SIZE);
1561 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1562
1563 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1564 qedi->rq_num_entries);
1565
1566 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1567 qedi->bdq_pbl_mem_size,
1568 &qedi->bdq_pbl_dma, GFP_KERNEL);
1569 if (!qedi->bdq_pbl) {
1570 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1571 return -ENOMEM;
1572 }
1573
1574 /*
1575 * Populate BDQ PBL with physical and virtual address of individual
1576 * BDQ buffers
1577 */
1578 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1579 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1580 pbl->address.hi =
1581 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1582 pbl->address.lo =
1583 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1584 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1585 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1586 pbl, pbl->address.hi, pbl->address.lo, i);
1587 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1588 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1589 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1590 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1591 pbl++;
1592 }
1593
1594 /* Allocate list of PBL pages */
1595 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1596 QEDI_PAGE_SIZE,
1597 &qedi->bdq_pbl_list_dma,
1598 GFP_KERNEL);
1599 if (!qedi->bdq_pbl_list) {
1600 QEDI_ERR(&qedi->dbg_ctx,
1601 "Could not allocate list of PBL pages.\n");
1602 return -ENOMEM;
1603 }
1604
1605 /*
1606 * Now populate PBL list with pages that contain pointers to the
1607 * individual buffers.
1608 */
1609 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size /
1610 QEDI_PAGE_SIZE;
1611 list = (u64 *)qedi->bdq_pbl_list;
1612 page = qedi->bdq_pbl_list_dma;
1613 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1614 *list = qedi->bdq_pbl_dma;
1615 list++;
1616 page += QEDI_PAGE_SIZE;
1617 }
1618
1619 return 0;
1620 }
1621
1622 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1623 {
1624 u32 *list;
1625 int i;
1626 int status = 0, rc;
1627 u32 *pbl;
1628 dma_addr_t page;
1629 int num_pages;
1630
1631 /*
1632 * Number of global queues (CQ / RQ). This should
1633 * be <= number of available MSIX vectors for the PF
1634 */
1635 if (!qedi->num_queues) {
1636 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1637 return 1;
1638 }
1639
1640 /* Make sure we allocated the PBL that will contain the physical
1641 * addresses of our queues
1642 */
1643 if (!qedi->p_cpuq) {
1644 status = 1;
1645 goto mem_alloc_failure;
1646 }
1647
1648 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1649 qedi->num_queues), GFP_KERNEL);
1650 if (!qedi->global_queues) {
1651 QEDI_ERR(&qedi->dbg_ctx,
1652 "Unable to allocate global queues array ptr memory\n");
1653 return -ENOMEM;
1654 }
1655 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1656 "qedi->global_queues=%p.\n", qedi->global_queues);
1657
1658 /* Allocate DMA coherent buffers for BDQ */
1659 rc = qedi_alloc_bdq(qedi);
1660 if (rc)
1661 goto mem_alloc_failure;
1662
1663 /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1664 rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1665 if (rc)
1666 goto mem_alloc_failure;
1667
1668 /* Allocate a CQ and an associated PBL for each MSI-X
1669 * vector.
1670 */
1671 for (i = 0; i < qedi->num_queues; i++) {
1672 qedi->global_queues[i] =
1673 kzalloc(sizeof(*qedi->global_queues[0]),
1674 GFP_KERNEL);
1675 if (!qedi->global_queues[i]) {
1676 QEDI_ERR(&qedi->dbg_ctx,
1677 "Unable to allocation global queue %d.\n", i);
1678 goto mem_alloc_failure;
1679 }
1680
1681 qedi->global_queues[i]->cq_mem_size =
1682 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1683 qedi->global_queues[i]->cq_mem_size =
1684 (qedi->global_queues[i]->cq_mem_size +
1685 (QEDI_PAGE_SIZE - 1));
1686
1687 qedi->global_queues[i]->cq_pbl_size =
1688 (qedi->global_queues[i]->cq_mem_size /
1689 QEDI_PAGE_SIZE) * sizeof(void *);
1690 qedi->global_queues[i]->cq_pbl_size =
1691 (qedi->global_queues[i]->cq_pbl_size +
1692 (QEDI_PAGE_SIZE - 1));
1693
1694 qedi->global_queues[i]->cq = dma_alloc_coherent(&qedi->pdev->dev,
1695 qedi->global_queues[i]->cq_mem_size,
1696 &qedi->global_queues[i]->cq_dma,
1697 GFP_KERNEL);
1698
1699 if (!qedi->global_queues[i]->cq) {
1700 QEDI_WARN(&qedi->dbg_ctx,
1701 "Could not allocate cq.\n");
1702 status = -ENOMEM;
1703 goto mem_alloc_failure;
1704 }
1705 qedi->global_queues[i]->cq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1706 qedi->global_queues[i]->cq_pbl_size,
1707 &qedi->global_queues[i]->cq_pbl_dma,
1708 GFP_KERNEL);
1709
1710 if (!qedi->global_queues[i]->cq_pbl) {
1711 QEDI_WARN(&qedi->dbg_ctx,
1712 "Could not allocate cq PBL.\n");
1713 status = -ENOMEM;
1714 goto mem_alloc_failure;
1715 }
1716
1717 /* Create PBL */
1718 num_pages = qedi->global_queues[i]->cq_mem_size /
1719 QEDI_PAGE_SIZE;
1720 page = qedi->global_queues[i]->cq_dma;
1721 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1722
1723 while (num_pages--) {
1724 *pbl = (u32)page;
1725 pbl++;
1726 *pbl = (u32)((u64)page >> 32);
1727 pbl++;
1728 page += QEDI_PAGE_SIZE;
1729 }
1730 }
1731
1732 list = (u32 *)qedi->p_cpuq;
1733
1734 /*
1735 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1736 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1737 * to the physical address which contains an array of pointers to the
1738 * physical addresses of the specific queue pages.
1739 */
1740 for (i = 0; i < qedi->num_queues; i++) {
1741 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1742 list++;
1743 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1744 list++;
1745
1746 *list = (u32)0;
1747 list++;
1748 *list = (u32)((u64)0 >> 32);
1749 list++;
1750 }
1751
1752 return 0;
1753
1754 mem_alloc_failure:
1755 qedi_free_global_queues(qedi);
1756 return status;
1757 }
1758
1759 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1760 {
1761 int rval = 0;
1762 u32 *pbl;
1763 dma_addr_t page;
1764 int num_pages;
1765
1766 if (!ep)
1767 return -EIO;
1768
1769 /* Calculate appropriate queue and PBL sizes */
1770 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1771 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1772
1773 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1774 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1775
1776 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1777 &ep->sq_dma, GFP_KERNEL);
1778 if (!ep->sq) {
1779 QEDI_WARN(&qedi->dbg_ctx,
1780 "Could not allocate send queue.\n");
1781 rval = -ENOMEM;
1782 goto out;
1783 }
1784 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1785 &ep->sq_pbl_dma, GFP_KERNEL);
1786 if (!ep->sq_pbl) {
1787 QEDI_WARN(&qedi->dbg_ctx,
1788 "Could not allocate send queue PBL.\n");
1789 rval = -ENOMEM;
1790 goto out_free_sq;
1791 }
1792
1793 /* Create PBL */
1794 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1795 page = ep->sq_dma;
1796 pbl = (u32 *)ep->sq_pbl;
1797
1798 while (num_pages--) {
1799 *pbl = (u32)page;
1800 pbl++;
1801 *pbl = (u32)((u64)page >> 32);
1802 pbl++;
1803 page += QEDI_PAGE_SIZE;
1804 }
1805
1806 return rval;
1807
1808 out_free_sq:
1809 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1810 ep->sq_dma);
1811 out:
1812 return rval;
1813 }
1814
1815 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1816 {
1817 if (ep->sq_pbl)
1818 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1819 ep->sq_pbl_dma);
1820 if (ep->sq)
1821 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1822 ep->sq_dma);
1823 }
1824
1825 int qedi_get_task_idx(struct qedi_ctx *qedi)
1826 {
1827 s16 tmp_idx;
1828
1829 again:
1830 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1831 MAX_ISCSI_TASK_ENTRIES);
1832
1833 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1834 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1835 tmp_idx = -1;
1836 goto err_idx;
1837 }
1838
1839 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1840 goto again;
1841
1842 err_idx:
1843 return tmp_idx;
1844 }
1845
1846 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1847 {
1848 if (!test_and_clear_bit(idx, qedi->task_idx_map))
1849 QEDI_ERR(&qedi->dbg_ctx,
1850 "FW task context, already cleared, tid=0x%x\n", idx);
1851 }
1852
1853 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1854 struct qedi_cmd *cmd)
1855 {
1856 qedi->itt_map[tid].itt = proto_itt;
1857 qedi->itt_map[tid].p_cmd = cmd;
1858
1859 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1860 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1861 qedi->itt_map[tid].itt);
1862 }
1863
1864 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1865 {
1866 u16 i;
1867
1868 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1869 if (qedi->itt_map[i].itt == itt) {
1870 *tid = i;
1871 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1872 "Ref itt=0x%x, found at tid=0x%x\n",
1873 itt, *tid);
1874 return;
1875 }
1876 }
1877
1878 WARN_ON(1);
1879 }
1880
1881 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1882 {
1883 *proto_itt = qedi->itt_map[tid].itt;
1884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1885 "Get itt map tid [0x%x with proto itt[0x%x]",
1886 tid, *proto_itt);
1887 }
1888
1889 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1890 {
1891 struct qedi_cmd *cmd = NULL;
1892
1893 if (tid >= MAX_ISCSI_TASK_ENTRIES)
1894 return NULL;
1895
1896 cmd = qedi->itt_map[tid].p_cmd;
1897 if (cmd->task_id != tid)
1898 return NULL;
1899
1900 qedi->itt_map[tid].p_cmd = NULL;
1901
1902 return cmd;
1903 }
1904
1905 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1906 {
1907 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1908 sizeof(struct qedi_itt_map), GFP_KERNEL);
1909 if (!qedi->itt_map) {
1910 QEDI_ERR(&qedi->dbg_ctx,
1911 "Unable to allocate itt map array memory\n");
1912 return -ENOMEM;
1913 }
1914 return 0;
1915 }
1916
1917 static void qedi_free_itt(struct qedi_ctx *qedi)
1918 {
1919 kfree(qedi->itt_map);
1920 }
1921
1922 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1923 .rx_cb = qedi_ll2_rx,
1924 .tx_cb = NULL,
1925 };
1926
1927 static int qedi_percpu_io_thread(void *arg)
1928 {
1929 struct qedi_percpu_s *p = arg;
1930 struct qedi_work *work, *tmp;
1931 unsigned long flags;
1932 LIST_HEAD(work_list);
1933
1934 set_user_nice(current, -20);
1935
1936 while (!kthread_should_stop()) {
1937 spin_lock_irqsave(&p->p_work_lock, flags);
1938 while (!list_empty(&p->work_list)) {
1939 list_splice_init(&p->work_list, &work_list);
1940 spin_unlock_irqrestore(&p->p_work_lock, flags);
1941
1942 list_for_each_entry_safe(work, tmp, &work_list, list) {
1943 list_del_init(&work->list);
1944 qedi_fp_process_cqes(work);
1945 if (!work->is_solicited)
1946 kfree(work);
1947 }
1948 cond_resched();
1949 spin_lock_irqsave(&p->p_work_lock, flags);
1950 }
1951 set_current_state(TASK_INTERRUPTIBLE);
1952 spin_unlock_irqrestore(&p->p_work_lock, flags);
1953 schedule();
1954 }
1955 __set_current_state(TASK_RUNNING);
1956
1957 return 0;
1958 }
1959
1960 static int qedi_cpu_online(unsigned int cpu)
1961 {
1962 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1963 struct task_struct *thread;
1964
1965 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1966 cpu_to_node(cpu),
1967 "qedi_thread/%d", cpu);
1968 if (IS_ERR(thread))
1969 return PTR_ERR(thread);
1970
1971 kthread_bind(thread, cpu);
1972 p->iothread = thread;
1973 wake_up_process(thread);
1974 return 0;
1975 }
1976
1977 static int qedi_cpu_offline(unsigned int cpu)
1978 {
1979 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1980 struct qedi_work *work, *tmp;
1981 struct task_struct *thread;
1982
1983 spin_lock_bh(&p->p_work_lock);
1984 thread = p->iothread;
1985 p->iothread = NULL;
1986
1987 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1988 list_del_init(&work->list);
1989 qedi_fp_process_cqes(work);
1990 if (!work->is_solicited)
1991 kfree(work);
1992 }
1993
1994 spin_unlock_bh(&p->p_work_lock);
1995 if (thread)
1996 kthread_stop(thread);
1997 return 0;
1998 }
1999
2000 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
2001 {
2002 struct qed_ll2_params params;
2003
2004 qedi_recover_all_conns(qedi);
2005
2006 qedi_ops->ll2->stop(qedi->cdev);
2007 qedi_ll2_free_skbs(qedi);
2008
2009 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
2010 qedi->ll2_mtu, mtu);
2011 memset(&params, 0, sizeof(params));
2012 qedi->ll2_mtu = mtu;
2013 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
2014 params.drop_ttl0_packets = 0;
2015 params.rx_vlan_stripping = 1;
2016 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2017 qedi_ops->ll2->start(qedi->cdev, &params);
2018 }
2019
2020 /*
2021 * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
2022 * for gaps) for the matching absolute-pf-id of the QEDI device.
2023 */
2024 static struct nvm_iscsi_block *
2025 qedi_get_nvram_block(struct qedi_ctx *qedi)
2026 {
2027 int i;
2028 u8 pf;
2029 u32 flags;
2030 struct nvm_iscsi_block *block;
2031
2032 pf = qedi->dev_info.common.abs_pf_id;
2033 block = &qedi->iscsi_image->iscsi_cfg.block[0];
2034 for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
2035 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
2036 NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
2037 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
2038 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
2039 (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
2040 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
2041 return block;
2042 }
2043 return NULL;
2044 }
2045
2046 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
2047 {
2048 struct qedi_ctx *qedi = data;
2049 struct nvm_iscsi_initiator *initiator;
2050 int rc = 1;
2051 u32 ipv6_en, dhcp_en, ip_len;
2052 struct nvm_iscsi_block *block;
2053 char *fmt, *ip, *sub, *gw;
2054
2055 block = qedi_get_nvram_block(qedi);
2056 if (!block)
2057 return 0;
2058
2059 initiator = &block->initiator;
2060 ipv6_en = block->generic.ctrl_flags &
2061 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2062 dhcp_en = block->generic.ctrl_flags &
2063 NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
2064 /* Static IP assignments. */
2065 fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
2066 ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
2067 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2068 sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
2069 initiator->ipv4.subnet_mask.byte;
2070 gw = ipv6_en ? initiator->ipv6.gateway.byte :
2071 initiator->ipv4.gateway.byte;
2072 /* DHCP IP adjustments. */
2073 fmt = dhcp_en ? "%s\n" : fmt;
2074 if (dhcp_en) {
2075 ip = ipv6_en ? "0::0" : "0.0.0.0";
2076 sub = ip;
2077 gw = ip;
2078 ip_len = ipv6_en ? 5 : 8;
2079 }
2080
2081 switch (type) {
2082 case ISCSI_BOOT_ETH_IP_ADDR:
2083 rc = snprintf(buf, ip_len, fmt, ip);
2084 break;
2085 case ISCSI_BOOT_ETH_SUBNET_MASK:
2086 rc = snprintf(buf, ip_len, fmt, sub);
2087 break;
2088 case ISCSI_BOOT_ETH_GATEWAY:
2089 rc = snprintf(buf, ip_len, fmt, gw);
2090 break;
2091 case ISCSI_BOOT_ETH_FLAGS:
2092 rc = snprintf(buf, 3, "%hhd\n",
2093 SYSFS_FLAG_FW_SEL_BOOT);
2094 break;
2095 case ISCSI_BOOT_ETH_INDEX:
2096 rc = snprintf(buf, 3, "0\n");
2097 break;
2098 case ISCSI_BOOT_ETH_MAC:
2099 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
2100 break;
2101 case ISCSI_BOOT_ETH_VLAN:
2102 rc = snprintf(buf, 12, "%d\n",
2103 GET_FIELD2(initiator->generic_cont0,
2104 NVM_ISCSI_CFG_INITIATOR_VLAN));
2105 break;
2106 case ISCSI_BOOT_ETH_ORIGIN:
2107 if (dhcp_en)
2108 rc = snprintf(buf, 3, "3\n");
2109 break;
2110 default:
2111 rc = 0;
2112 break;
2113 }
2114
2115 return rc;
2116 }
2117
2118 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
2119 {
2120 int rc = 1;
2121
2122 switch (type) {
2123 case ISCSI_BOOT_ETH_FLAGS:
2124 case ISCSI_BOOT_ETH_MAC:
2125 case ISCSI_BOOT_ETH_INDEX:
2126 case ISCSI_BOOT_ETH_IP_ADDR:
2127 case ISCSI_BOOT_ETH_SUBNET_MASK:
2128 case ISCSI_BOOT_ETH_GATEWAY:
2129 case ISCSI_BOOT_ETH_ORIGIN:
2130 case ISCSI_BOOT_ETH_VLAN:
2131 rc = 0444;
2132 break;
2133 default:
2134 rc = 0;
2135 break;
2136 }
2137 return rc;
2138 }
2139
2140 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2141 {
2142 struct qedi_ctx *qedi = data;
2143 struct nvm_iscsi_initiator *initiator;
2144 int rc;
2145 struct nvm_iscsi_block *block;
2146
2147 block = qedi_get_nvram_block(qedi);
2148 if (!block)
2149 return 0;
2150
2151 initiator = &block->initiator;
2152
2153 switch (type) {
2154 case ISCSI_BOOT_INI_INITIATOR_NAME:
2155 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2156 initiator->initiator_name.byte);
2157 break;
2158 default:
2159 rc = 0;
2160 break;
2161 }
2162 return rc;
2163 }
2164
2165 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2166 {
2167 int rc;
2168
2169 switch (type) {
2170 case ISCSI_BOOT_INI_INITIATOR_NAME:
2171 rc = 0444;
2172 break;
2173 default:
2174 rc = 0;
2175 break;
2176 }
2177 return rc;
2178 }
2179
2180 static ssize_t
2181 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2182 char *buf, enum qedi_nvm_tgts idx)
2183 {
2184 int rc = 1;
2185 u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2186 struct nvm_iscsi_block *block;
2187 char *chap_name, *chap_secret;
2188 char *mchap_name, *mchap_secret;
2189
2190 block = qedi_get_nvram_block(qedi);
2191 if (!block)
2192 goto exit_show_tgt_info;
2193
2194 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2195 "Port:%d, tgt_idx:%d\n",
2196 GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2197
2198 ctrl_flags = block->target[idx].ctrl_flags &
2199 NVM_ISCSI_CFG_TARGET_ENABLED;
2200
2201 if (!ctrl_flags) {
2202 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2203 "Target disabled\n");
2204 goto exit_show_tgt_info;
2205 }
2206
2207 ipv6_en = block->generic.ctrl_flags &
2208 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2209 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2210 chap_en = block->generic.ctrl_flags &
2211 NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2212 chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2213 chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2214
2215 mchap_en = block->generic.ctrl_flags &
2216 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2217 mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2218 mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2219
2220 switch (type) {
2221 case ISCSI_BOOT_TGT_NAME:
2222 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2223 block->target[idx].target_name.byte);
2224 break;
2225 case ISCSI_BOOT_TGT_IP_ADDR:
2226 if (ipv6_en)
2227 rc = snprintf(buf, ip_len, "%pI6\n",
2228 block->target[idx].ipv6_addr.byte);
2229 else
2230 rc = snprintf(buf, ip_len, "%pI4\n",
2231 block->target[idx].ipv4_addr.byte);
2232 break;
2233 case ISCSI_BOOT_TGT_PORT:
2234 rc = snprintf(buf, 12, "%d\n",
2235 GET_FIELD2(block->target[idx].generic_cont0,
2236 NVM_ISCSI_CFG_TARGET_TCP_PORT));
2237 break;
2238 case ISCSI_BOOT_TGT_LUN:
2239 rc = snprintf(buf, 22, "%.*d\n",
2240 block->target[idx].lun.value[1],
2241 block->target[idx].lun.value[0]);
2242 break;
2243 case ISCSI_BOOT_TGT_CHAP_NAME:
2244 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2245 chap_name);
2246 break;
2247 case ISCSI_BOOT_TGT_CHAP_SECRET:
2248 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2249 chap_secret);
2250 break;
2251 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2252 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2253 mchap_name);
2254 break;
2255 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2256 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2257 mchap_secret);
2258 break;
2259 case ISCSI_BOOT_TGT_FLAGS:
2260 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2261 break;
2262 case ISCSI_BOOT_TGT_NIC_ASSOC:
2263 rc = snprintf(buf, 3, "0\n");
2264 break;
2265 default:
2266 rc = 0;
2267 break;
2268 }
2269
2270 exit_show_tgt_info:
2271 return rc;
2272 }
2273
2274 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2275 {
2276 struct qedi_ctx *qedi = data;
2277
2278 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2279 }
2280
2281 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2282 {
2283 struct qedi_ctx *qedi = data;
2284
2285 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2286 }
2287
2288 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2289 {
2290 int rc;
2291
2292 switch (type) {
2293 case ISCSI_BOOT_TGT_NAME:
2294 case ISCSI_BOOT_TGT_IP_ADDR:
2295 case ISCSI_BOOT_TGT_PORT:
2296 case ISCSI_BOOT_TGT_LUN:
2297 case ISCSI_BOOT_TGT_CHAP_NAME:
2298 case ISCSI_BOOT_TGT_CHAP_SECRET:
2299 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2300 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2301 case ISCSI_BOOT_TGT_NIC_ASSOC:
2302 case ISCSI_BOOT_TGT_FLAGS:
2303 rc = 0444;
2304 break;
2305 default:
2306 rc = 0;
2307 break;
2308 }
2309 return rc;
2310 }
2311
2312 static void qedi_boot_release(void *data)
2313 {
2314 struct qedi_ctx *qedi = data;
2315
2316 scsi_host_put(qedi->shost);
2317 }
2318
2319 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2320 {
2321 int ret = 1;
2322
2323 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2324 "Get NVM iSCSI CFG image\n");
2325 ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2326 QED_NVM_IMAGE_ISCSI_CFG,
2327 (char *)qedi->iscsi_image,
2328 sizeof(struct qedi_nvm_iscsi_image));
2329 if (ret)
2330 QEDI_ERR(&qedi->dbg_ctx,
2331 "Could not get NVM image. ret = %d\n", ret);
2332
2333 return ret;
2334 }
2335
2336 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2337 {
2338 struct iscsi_boot_kobj *boot_kobj;
2339
2340 if (qedi_get_boot_info(qedi))
2341 return -EPERM;
2342
2343 qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2344 if (!qedi->boot_kset)
2345 goto kset_free;
2346
2347 if (!scsi_host_get(qedi->shost))
2348 goto kset_free;
2349
2350 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2351 qedi_show_boot_tgt_pri_info,
2352 qedi_tgt_get_attr_visibility,
2353 qedi_boot_release);
2354 if (!boot_kobj)
2355 goto put_host;
2356
2357 if (!scsi_host_get(qedi->shost))
2358 goto kset_free;
2359
2360 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2361 qedi_show_boot_tgt_sec_info,
2362 qedi_tgt_get_attr_visibility,
2363 qedi_boot_release);
2364 if (!boot_kobj)
2365 goto put_host;
2366
2367 if (!scsi_host_get(qedi->shost))
2368 goto kset_free;
2369
2370 boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2371 qedi_show_boot_ini_info,
2372 qedi_ini_get_attr_visibility,
2373 qedi_boot_release);
2374 if (!boot_kobj)
2375 goto put_host;
2376
2377 if (!scsi_host_get(qedi->shost))
2378 goto kset_free;
2379
2380 boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2381 qedi_show_boot_eth_info,
2382 qedi_eth_get_attr_visibility,
2383 qedi_boot_release);
2384 if (!boot_kobj)
2385 goto put_host;
2386
2387 return 0;
2388
2389 put_host:
2390 scsi_host_put(qedi->shost);
2391 kset_free:
2392 iscsi_boot_destroy_kset(qedi->boot_kset);
2393 return -ENOMEM;
2394 }
2395
2396 static pci_ers_result_t qedi_io_error_detected(struct pci_dev *pdev,
2397 pci_channel_state_t state)
2398 {
2399 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2400
2401 QEDI_ERR(&qedi->dbg_ctx, "%s: PCI error detected [%d]\n",
2402 __func__, state);
2403
2404 if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
2405 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2406 "Recovery already in progress.\n");
2407 return PCI_ERS_RESULT_NONE;
2408 }
2409
2410 qedi_ops->common->recovery_process(qedi->cdev);
2411
2412 return PCI_ERS_RESULT_CAN_RECOVER;
2413 }
2414
2415 static void __qedi_remove(struct pci_dev *pdev, int mode)
2416 {
2417 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2418 int rval;
2419 u16 retry = 10;
2420
2421 if (mode == QEDI_MODE_SHUTDOWN)
2422 iscsi_host_for_each_session(qedi->shost,
2423 qedi_clear_session_ctx);
2424
2425 if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
2426 if (qedi->tmf_thread) {
2427 flush_workqueue(qedi->tmf_thread);
2428 destroy_workqueue(qedi->tmf_thread);
2429 qedi->tmf_thread = NULL;
2430 }
2431
2432 if (qedi->offload_thread) {
2433 flush_workqueue(qedi->offload_thread);
2434 destroy_workqueue(qedi->offload_thread);
2435 qedi->offload_thread = NULL;
2436 }
2437 }
2438
2439 #ifdef CONFIG_DEBUG_FS
2440 qedi_dbg_host_exit(&qedi->dbg_ctx);
2441 #endif
2442 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2443 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2444
2445 qedi_sync_free_irqs(qedi);
2446
2447 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2448 while (retry--) {
2449 rval = qedi_ops->stop(qedi->cdev);
2450 if (rval < 0)
2451 msleep(1000);
2452 else
2453 break;
2454 }
2455 qedi_ops->ll2->stop(qedi->cdev);
2456 }
2457
2458 qedi_free_iscsi_pf_param(qedi);
2459
2460 rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2461 if (rval)
2462 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2463
2464 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2465 qedi_ops->common->slowpath_stop(qedi->cdev);
2466 qedi_ops->common->remove(qedi->cdev);
2467 }
2468
2469 qedi_destroy_fp(qedi);
2470
2471 if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
2472 qedi_release_cid_que(qedi);
2473 qedi_cm_free_mem(qedi);
2474 qedi_free_uio(qedi->udev);
2475 qedi_free_itt(qedi);
2476
2477 if (qedi->ll2_recv_thread) {
2478 kthread_stop(qedi->ll2_recv_thread);
2479 qedi->ll2_recv_thread = NULL;
2480 }
2481 qedi_ll2_free_skbs(qedi);
2482
2483 if (qedi->boot_kset)
2484 iscsi_boot_destroy_kset(qedi->boot_kset);
2485
2486 iscsi_host_remove(qedi->shost);
2487 iscsi_host_free(qedi->shost);
2488 }
2489 }
2490
2491 static void qedi_board_disable_work(struct work_struct *work)
2492 {
2493 struct qedi_ctx *qedi =
2494 container_of(work, struct qedi_ctx,
2495 board_disable_work.work);
2496
2497 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2498 "Fan failure, Unloading firmware context.\n");
2499
2500 if (test_and_set_bit(QEDI_IN_SHUTDOWN, &qedi->flags))
2501 return;
2502
2503 __qedi_remove(qedi->pdev, QEDI_MODE_SHUTDOWN);
2504 }
2505
2506 static void qedi_shutdown(struct pci_dev *pdev)
2507 {
2508 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2509
2510 QEDI_ERR(&qedi->dbg_ctx, "%s: Shutdown qedi\n", __func__);
2511 if (test_and_set_bit(QEDI_IN_SHUTDOWN, &qedi->flags))
2512 return;
2513 __qedi_remove(pdev, QEDI_MODE_SHUTDOWN);
2514 }
2515
2516 static int __qedi_probe(struct pci_dev *pdev, int mode)
2517 {
2518 struct qedi_ctx *qedi;
2519 struct qed_ll2_params params;
2520 u8 dp_level = 0;
2521 bool is_vf = false;
2522 char host_buf[16];
2523 struct qed_link_params link_params;
2524 struct qed_slowpath_params sp_params;
2525 struct qed_probe_params qed_params;
2526 void *task_start, *task_end;
2527 int rc;
2528 u16 retry = 10;
2529
2530 if (mode != QEDI_MODE_RECOVERY) {
2531 qedi = qedi_host_alloc(pdev);
2532 if (!qedi) {
2533 rc = -ENOMEM;
2534 goto exit_probe;
2535 }
2536 } else {
2537 qedi = pci_get_drvdata(pdev);
2538 }
2539
2540 retry_probe:
2541 if (mode == QEDI_MODE_RECOVERY)
2542 msleep(2000);
2543
2544 memset(&qed_params, 0, sizeof(qed_params));
2545 qed_params.protocol = QED_PROTOCOL_ISCSI;
2546 qed_params.dp_module = qedi_qed_debug;
2547 qed_params.dp_level = dp_level;
2548 qed_params.is_vf = is_vf;
2549 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2550 if (!qedi->cdev) {
2551 if (mode == QEDI_MODE_RECOVERY && retry) {
2552 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2553 "Retry %d initialize hardware\n", retry);
2554 retry--;
2555 goto retry_probe;
2556 }
2557
2558 rc = -ENODEV;
2559 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2560 goto free_host;
2561 }
2562
2563 set_bit(QEDI_ERR_ATTN_CLR_EN, &qedi->qedi_err_flags);
2564 set_bit(QEDI_ERR_IS_RECOVERABLE, &qedi->qedi_err_flags);
2565 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2566
2567 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2568 if (rc)
2569 goto free_host;
2570
2571 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2572 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
2573 qedi->dev_info.common.num_hwfns,
2574 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
2575
2576 rc = qedi_set_iscsi_pf_param(qedi);
2577 if (rc) {
2578 rc = -ENOMEM;
2579 QEDI_ERR(&qedi->dbg_ctx,
2580 "Set iSCSI pf param fail\n");
2581 goto free_host;
2582 }
2583
2584 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2585
2586 rc = qedi_prepare_fp(qedi);
2587 if (rc) {
2588 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2589 goto free_pf_params;
2590 }
2591
2592 /* Start the Slowpath-process */
2593 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2594 sp_params.int_mode = QED_INT_MODE_MSIX;
2595 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2596 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2597 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2598 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2599 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2600 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2601 if (rc) {
2602 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2603 goto stop_hw;
2604 }
2605
2606 /* update_pf_params needs to be called before and after slowpath
2607 * start
2608 */
2609 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2610
2611 rc = qedi_setup_int(qedi);
2612 if (rc)
2613 goto stop_iscsi_func;
2614
2615 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2616
2617 /* Learn information crucial for qedi to progress */
2618 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2619 if (rc)
2620 goto stop_iscsi_func;
2621
2622 /* Record BDQ producer doorbell addresses */
2623 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2624 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2625 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2626 "BDQ primary_prod=%p secondary_prod=%p.\n",
2627 qedi->bdq_primary_prod,
2628 qedi->bdq_secondary_prod);
2629
2630 /*
2631 * We need to write the number of BDs in the BDQ we've preallocated so
2632 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2633 * packet arrives.
2634 */
2635 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2636 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2637 "Writing %d to primary and secondary BDQ doorbell registers.\n",
2638 qedi->bdq_prod_idx);
2639 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2640 readw(qedi->bdq_primary_prod);
2641 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2642 readw(qedi->bdq_secondary_prod);
2643
2644 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2645 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2646 qedi->mac);
2647
2648 snprintf(host_buf, sizeof(host_buf), "host_%d", qedi->shost->host_no);
2649 qedi_ops->common->set_name(qedi->cdev, host_buf);
2650
2651 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2652
2653 memset(&params, 0, sizeof(params));
2654 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2655 qedi->ll2_mtu = DEF_PATH_MTU;
2656 params.drop_ttl0_packets = 0;
2657 params.rx_vlan_stripping = 1;
2658 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2659
2660 if (mode != QEDI_MODE_RECOVERY) {
2661 /* set up rx path */
2662 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2663 spin_lock_init(&qedi->ll2_lock);
2664 /* start qedi context */
2665 spin_lock_init(&qedi->hba_lock);
2666 spin_lock_init(&qedi->task_idx_lock);
2667 mutex_init(&qedi->stats_lock);
2668 }
2669 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2670 qedi_ops->ll2->start(qedi->cdev, &params);
2671
2672 if (mode != QEDI_MODE_RECOVERY) {
2673 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2674 (void *)qedi,
2675 "qedi_ll2_thread");
2676 }
2677
2678 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2679 qedi, qedi_iscsi_event_cb);
2680 if (rc) {
2681 rc = -ENODEV;
2682 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2683 goto stop_slowpath;
2684 }
2685
2686 task_start = qedi_get_task_mem(&qedi->tasks, 0);
2687 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2688 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2689 "Task context start=%p, end=%p block_size=%u.\n",
2690 task_start, task_end, qedi->tasks.size);
2691
2692 memset(&link_params, 0, sizeof(link_params));
2693 link_params.link_up = true;
2694 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2695 if (rc) {
2696 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2697 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2698 }
2699
2700 #ifdef CONFIG_DEBUG_FS
2701 qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2702 qedi_dbg_fops);
2703 #endif
2704 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2705 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2706 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2707 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2708
2709 if (mode == QEDI_MODE_NORMAL) {
2710 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2711 QEDI_ERR(&qedi->dbg_ctx,
2712 "Could not add iscsi host\n");
2713 rc = -ENOMEM;
2714 goto remove_host;
2715 }
2716
2717 /* Allocate uio buffers */
2718 rc = qedi_alloc_uio_rings(qedi);
2719 if (rc) {
2720 QEDI_ERR(&qedi->dbg_ctx,
2721 "UIO alloc ring failed err=%d\n", rc);
2722 goto remove_host;
2723 }
2724
2725 rc = qedi_init_uio(qedi);
2726 if (rc) {
2727 QEDI_ERR(&qedi->dbg_ctx,
2728 "UIO init failed, err=%d\n", rc);
2729 goto free_uio;
2730 }
2731
2732 /* host the array on iscsi_conn */
2733 rc = qedi_setup_cid_que(qedi);
2734 if (rc) {
2735 QEDI_ERR(&qedi->dbg_ctx,
2736 "Could not setup cid que\n");
2737 goto free_uio;
2738 }
2739
2740 rc = qedi_cm_alloc_mem(qedi);
2741 if (rc) {
2742 QEDI_ERR(&qedi->dbg_ctx,
2743 "Could not alloc cm memory\n");
2744 goto free_cid_que;
2745 }
2746
2747 rc = qedi_alloc_itt(qedi);
2748 if (rc) {
2749 QEDI_ERR(&qedi->dbg_ctx,
2750 "Could not alloc itt memory\n");
2751 goto free_cid_que;
2752 }
2753
2754 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2755 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2756 if (!qedi->tmf_thread) {
2757 QEDI_ERR(&qedi->dbg_ctx,
2758 "Unable to start tmf thread!\n");
2759 rc = -ENODEV;
2760 goto free_cid_que;
2761 }
2762
2763 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2764 qedi->offload_thread = create_workqueue(host_buf);
2765 if (!qedi->offload_thread) {
2766 QEDI_ERR(&qedi->dbg_ctx,
2767 "Unable to start offload thread!\n");
2768 rc = -ENODEV;
2769 goto free_tmf_thread;
2770 }
2771
2772 INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler);
2773 INIT_DELAYED_WORK(&qedi->board_disable_work,
2774 qedi_board_disable_work);
2775
2776 /* F/w needs 1st task context memory entry for performance */
2777 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2778 atomic_set(&qedi->num_offloads, 0);
2779
2780 if (qedi_setup_boot_info(qedi))
2781 QEDI_ERR(&qedi->dbg_ctx,
2782 "No iSCSI boot target configured\n");
2783
2784 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2785 if (rc)
2786 QEDI_ERR(&qedi->dbg_ctx,
2787 "Failed to send drv state to MFW\n");
2788
2789 }
2790
2791 return 0;
2792
2793 free_tmf_thread:
2794 destroy_workqueue(qedi->tmf_thread);
2795 free_cid_que:
2796 qedi_release_cid_que(qedi);
2797 free_uio:
2798 qedi_free_uio(qedi->udev);
2799 remove_host:
2800 #ifdef CONFIG_DEBUG_FS
2801 qedi_dbg_host_exit(&qedi->dbg_ctx);
2802 #endif
2803 iscsi_host_remove(qedi->shost);
2804 stop_iscsi_func:
2805 qedi_ops->stop(qedi->cdev);
2806 stop_slowpath:
2807 qedi_ops->common->slowpath_stop(qedi->cdev);
2808 stop_hw:
2809 qedi_ops->common->remove(qedi->cdev);
2810 free_pf_params:
2811 qedi_free_iscsi_pf_param(qedi);
2812 free_host:
2813 iscsi_host_free(qedi->shost);
2814 exit_probe:
2815 return rc;
2816 }
2817
2818 static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session)
2819 {
2820 struct iscsi_session *session = cls_session->dd_data;
2821 struct iscsi_conn *conn = session->leadconn;
2822 struct qedi_conn *qedi_conn = conn->dd_data;
2823
2824 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, ISCSI_ERR_CONN_FAILED);
2825 }
2826
2827 static void qedi_recovery_handler(struct work_struct *work)
2828 {
2829 struct qedi_ctx *qedi =
2830 container_of(work, struct qedi_ctx, recovery_work.work);
2831
2832 iscsi_host_for_each_session(qedi->shost, qedi_mark_conn_recovery);
2833
2834 /* Call common_ops->recovery_prolog to allow the MFW to quiesce
2835 * any PCI transactions.
2836 */
2837 qedi_ops->common->recovery_prolog(qedi->cdev);
2838
2839 __qedi_remove(qedi->pdev, QEDI_MODE_RECOVERY);
2840 __qedi_probe(qedi->pdev, QEDI_MODE_RECOVERY);
2841 clear_bit(QEDI_IN_RECOVERY, &qedi->flags);
2842 }
2843
2844 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2845 {
2846 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2847 }
2848
2849 static void qedi_remove(struct pci_dev *pdev)
2850 {
2851 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2852 }
2853
2854 static struct pci_device_id qedi_pci_tbl[] = {
2855 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2856 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2857 { 0 },
2858 };
2859 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2860
2861 static enum cpuhp_state qedi_cpuhp_state;
2862
2863 static struct pci_error_handlers qedi_err_handler = {
2864 .error_detected = qedi_io_error_detected,
2865 };
2866
2867 static struct pci_driver qedi_pci_driver = {
2868 .name = QEDI_MODULE_NAME,
2869 .id_table = qedi_pci_tbl,
2870 .probe = qedi_probe,
2871 .remove = qedi_remove,
2872 .shutdown = qedi_shutdown,
2873 .err_handler = &qedi_err_handler,
2874 };
2875
2876 static int __init qedi_init(void)
2877 {
2878 struct qedi_percpu_s *p;
2879 int cpu, rc = 0;
2880
2881 qedi_ops = qed_get_iscsi_ops();
2882 if (!qedi_ops) {
2883 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2884 return -EINVAL;
2885 }
2886
2887 #ifdef CONFIG_DEBUG_FS
2888 qedi_dbg_init("qedi");
2889 #endif
2890
2891 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2892 if (!qedi_scsi_transport) {
2893 QEDI_ERR(NULL, "Could not register qedi transport");
2894 rc = -ENOMEM;
2895 goto exit_qedi_init_1;
2896 }
2897
2898 for_each_possible_cpu(cpu) {
2899 p = &per_cpu(qedi_percpu, cpu);
2900 INIT_LIST_HEAD(&p->work_list);
2901 spin_lock_init(&p->p_work_lock);
2902 p->iothread = NULL;
2903 }
2904
2905 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2906 qedi_cpu_online, qedi_cpu_offline);
2907 if (rc < 0)
2908 goto exit_qedi_init_2;
2909 qedi_cpuhp_state = rc;
2910
2911 rc = pci_register_driver(&qedi_pci_driver);
2912 if (rc) {
2913 QEDI_ERR(NULL, "Failed to register driver\n");
2914 goto exit_qedi_hp;
2915 }
2916
2917 return 0;
2918
2919 exit_qedi_hp:
2920 cpuhp_remove_state(qedi_cpuhp_state);
2921 exit_qedi_init_2:
2922 iscsi_unregister_transport(&qedi_iscsi_transport);
2923 exit_qedi_init_1:
2924 #ifdef CONFIG_DEBUG_FS
2925 qedi_dbg_exit();
2926 #endif
2927 qed_put_iscsi_ops();
2928 return rc;
2929 }
2930
2931 static void __exit qedi_cleanup(void)
2932 {
2933 pci_unregister_driver(&qedi_pci_driver);
2934 cpuhp_remove_state(qedi_cpuhp_state);
2935 iscsi_unregister_transport(&qedi_iscsi_transport);
2936
2937 #ifdef CONFIG_DEBUG_FS
2938 qedi_dbg_exit();
2939 #endif
2940 qed_put_iscsi_ops();
2941 }
2942
2943 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2944 MODULE_LICENSE("GPL");
2945 MODULE_AUTHOR("QLogic Corporation");
2946 MODULE_VERSION(QEDI_MODULE_VERSION);
2947 module_init(qedi_init);
2948 module_exit(qedi_cleanup);
Linux with added FPC-III support