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
31static uint qedi_qed_debug;
32module_param(qedi_qed_debug, uint, 0644);
33MODULE_PARM_DESC(qedi_qed_debug, " QED debug level 0 (default)");
34
35static uint qedi_fw_debug;
36module_param(qedi_fw_debug, uint, 0644);
37MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
38
39uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
40module_param(qedi_dbg_log, uint, 0644);
41MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
42
43uint qedi_io_tracing;
44module_param(qedi_io_tracing, uint, 0644);
45MODULE_PARM_DESC(qedi_io_tracing,
46 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
47
48static uint qedi_ll2_buf_size = 0x400;
49module_param(qedi_ll2_buf_size, uint, 0644);
50MODULE_PARM_DESC(qedi_ll2_buf_size,
51 "parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400.");
52
53static uint qedi_flags_override;
54module_param(qedi_flags_override, uint, 0644);
55MODULE_PARM_DESC(qedi_flags_override, "Disable/Enable MFW error flags bits action.");
56
57const struct qed_iscsi_ops *qedi_ops;
58static struct scsi_transport_template *qedi_scsi_transport;
59static struct pci_driver qedi_pci_driver;
60static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
61static LIST_HEAD(qedi_udev_list);
62/* Static function declaration */
63static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
64static void qedi_free_global_queues(struct qedi_ctx *qedi);
65static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
66static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
67static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
68static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
69static void qedi_recovery_handler(struct work_struct *work);
70static void qedi_schedule_hw_err_handler(void *dev,
71 enum qed_hw_err_type err_type);
72static int qedi_suspend(struct pci_dev *pdev, pm_message_t state);
73
74static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
75{
76 struct qedi_ctx *qedi;
77 struct qedi_endpoint *qedi_ep;
78 struct iscsi_eqe_data *data;
79 int rval = 0;
80
81 if (!context || !fw_handle) {
82 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
83 return -EINVAL;
84 }
85
86 qedi = (struct qedi_ctx *)context;
87 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
88 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
89
90 data = (struct iscsi_eqe_data *)fw_handle;
91 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
92 "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
93 data->icid, data->conn_id, data->error_code,
94 data->error_pdu_opcode_reserved);
95
96 qedi_ep = qedi->ep_tbl[data->icid];
97
98 if (!qedi_ep) {
99 QEDI_WARN(&qedi->dbg_ctx,
100 "Cannot process event, ep already disconnected, cid=0x%x\n",
101 data->icid);
102 WARN_ON(1);
103 return -ENODEV;
104 }
105
106 switch (fw_event_code) {
107 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
108 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
109 qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
110
111 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
112 break;
113 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
114 qedi_ep->state = EP_STATE_DISCONN_COMPL;
115 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
116 break;
117 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
118 qedi_process_iscsi_error(ep: qedi_ep, data);
119 break;
120 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
121 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
122 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
123 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
124 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
125 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
126 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
127 qedi_process_tcp_error(ep: qedi_ep, data);
128 break;
129 default:
130 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
131 fw_event_code);
132 }
133
134 return rval;
135}
136
137static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
138{
139 struct qedi_uio_dev *udev = uinfo->priv;
140 struct qedi_ctx *qedi = udev->qedi;
141
142 if (!capable(CAP_NET_ADMIN))
143 return -EPERM;
144
145 if (udev->uio_dev != -1)
146 return -EBUSY;
147
148 rtnl_lock();
149 udev->uio_dev = iminor(inode);
150 qedi_reset_uio_rings(udev);
151 set_bit(UIO_DEV_OPENED, addr: &qedi->flags);
152 rtnl_unlock();
153
154 return 0;
155}
156
157static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
158{
159 struct qedi_uio_dev *udev = uinfo->priv;
160 struct qedi_ctx *qedi = udev->qedi;
161
162 udev->uio_dev = -1;
163 clear_bit(UIO_DEV_OPENED, addr: &qedi->flags);
164 qedi_ll2_free_skbs(qedi);
165 return 0;
166}
167
168static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
169{
170 if (udev->uctrl) {
171 free_page((unsigned long)udev->uctrl);
172 udev->uctrl = NULL;
173 }
174
175 if (udev->ll2_ring) {
176 free_page((unsigned long)udev->ll2_ring);
177 udev->ll2_ring = NULL;
178 }
179
180 if (udev->ll2_buf) {
181 free_pages(addr: (unsigned long)udev->ll2_buf, order: 2);
182 udev->ll2_buf = NULL;
183 }
184}
185
186static void __qedi_free_uio(struct qedi_uio_dev *udev)
187{
188 uio_unregister_device(info: &udev->qedi_uinfo);
189
190 __qedi_free_uio_rings(udev);
191
192 pci_dev_put(dev: udev->pdev);
193 kfree(objp: udev);
194}
195
196static void qedi_free_uio(struct qedi_uio_dev *udev)
197{
198 if (!udev)
199 return;
200
201 list_del_init(entry: &udev->list);
202 __qedi_free_uio(udev);
203}
204
205static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
206{
207 struct qedi_ctx *qedi = NULL;
208 struct qedi_uio_ctrl *uctrl = NULL;
209
210 qedi = udev->qedi;
211 uctrl = udev->uctrl;
212
213 spin_lock_bh(lock: &qedi->ll2_lock);
214 uctrl->host_rx_cons = 0;
215 uctrl->hw_rx_prod = 0;
216 uctrl->hw_rx_bd_prod = 0;
217 uctrl->host_rx_bd_cons = 0;
218
219 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
220 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
221 spin_unlock_bh(lock: &qedi->ll2_lock);
222}
223
224static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
225{
226 int rc = 0;
227
228 if (udev->ll2_ring || udev->ll2_buf)
229 return rc;
230
231 /* Memory for control area. */
232 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
233 if (!udev->uctrl)
234 return -ENOMEM;
235
236 /* Allocating memory for LL2 ring */
237 udev->ll2_ring_size = QEDI_PAGE_SIZE;
238 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
239 if (!udev->ll2_ring) {
240 rc = -ENOMEM;
241 goto exit_alloc_ring;
242 }
243
244 /* Allocating memory for Tx/Rx pkt buffer */
245 udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
246 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
247 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
248 __GFP_ZERO, order: 2);
249 if (!udev->ll2_buf) {
250 rc = -ENOMEM;
251 goto exit_alloc_buf;
252 }
253 return rc;
254
255exit_alloc_buf:
256 free_page((unsigned long)udev->ll2_ring);
257 udev->ll2_ring = NULL;
258exit_alloc_ring:
259 return rc;
260}
261
262static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
263{
264 struct qedi_uio_dev *udev = NULL;
265 int rc = 0;
266
267 list_for_each_entry(udev, &qedi_udev_list, list) {
268 if (udev->pdev == qedi->pdev) {
269 udev->qedi = qedi;
270 if (__qedi_alloc_uio_rings(udev)) {
271 udev->qedi = NULL;
272 return -ENOMEM;
273 }
274 qedi->udev = udev;
275 return 0;
276 }
277 }
278
279 udev = kzalloc(size: sizeof(*udev), GFP_KERNEL);
280 if (!udev)
281 goto err_udev;
282
283 udev->uio_dev = -1;
284
285 udev->qedi = qedi;
286 udev->pdev = qedi->pdev;
287
288 rc = __qedi_alloc_uio_rings(udev);
289 if (rc)
290 goto err_uctrl;
291
292 list_add(new: &udev->list, head: &qedi_udev_list);
293
294 pci_dev_get(dev: udev->pdev);
295 qedi->udev = udev;
296
297 udev->tx_pkt = udev->ll2_buf;
298 udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
299 return 0;
300
301 err_uctrl:
302 kfree(objp: udev);
303 err_udev:
304 return -ENOMEM;
305}
306
307static int qedi_init_uio(struct qedi_ctx *qedi)
308{
309 struct qedi_uio_dev *udev = qedi->udev;
310 struct uio_info *uinfo;
311 int ret = 0;
312
313 if (!udev)
314 return -ENOMEM;
315
316 uinfo = &udev->qedi_uinfo;
317
318 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
319 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
320 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
321
322 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
323 uinfo->mem[1].size = udev->ll2_ring_size;
324 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
325
326 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
327 uinfo->mem[2].size = udev->ll2_buf_size;
328 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
329
330 uinfo->name = "qedi_uio";
331 uinfo->version = QEDI_MODULE_VERSION;
332 uinfo->irq = UIO_IRQ_CUSTOM;
333
334 uinfo->open = qedi_uio_open;
335 uinfo->release = qedi_uio_close;
336
337 if (udev->uio_dev == -1) {
338 if (!uinfo->priv) {
339 uinfo->priv = udev;
340
341 ret = uio_register_device(&udev->pdev->dev, uinfo);
342 if (ret) {
343 QEDI_ERR(&qedi->dbg_ctx,
344 "UIO registration failed\n");
345 }
346 }
347 }
348
349 return ret;
350}
351
352static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
353 struct qed_sb_info *sb_info, u16 sb_id)
354{
355 struct status_block *sb_virt;
356 dma_addr_t sb_phys;
357 int ret;
358
359 sb_virt = dma_alloc_coherent(dev: &qedi->pdev->dev,
360 size: sizeof(struct status_block), dma_handle: &sb_phys,
361 GFP_KERNEL);
362 if (!sb_virt) {
363 QEDI_ERR(&qedi->dbg_ctx,
364 "Status block allocation failed for id = %d.\n",
365 sb_id);
366 return -ENOMEM;
367 }
368
369 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
370 sb_id, QED_SB_TYPE_STORAGE);
371 if (ret) {
372 QEDI_ERR(&qedi->dbg_ctx,
373 "Status block initialization failed for id = %d.\n",
374 sb_id);
375 return ret;
376 }
377
378 return 0;
379}
380
381static void qedi_free_sb(struct qedi_ctx *qedi)
382{
383 struct qed_sb_info *sb_info;
384 int id;
385
386 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
387 sb_info = &qedi->sb_array[id];
388 if (sb_info->sb_virt)
389 dma_free_coherent(dev: &qedi->pdev->dev,
390 size: sizeof(*sb_info->sb_virt),
391 cpu_addr: (void *)sb_info->sb_virt,
392 dma_handle: sb_info->sb_phys);
393 }
394}
395
396static void qedi_free_fp(struct qedi_ctx *qedi)
397{
398 kfree(objp: qedi->fp_array);
399 kfree(objp: qedi->sb_array);
400}
401
402static void qedi_destroy_fp(struct qedi_ctx *qedi)
403{
404 qedi_free_sb(qedi);
405 qedi_free_fp(qedi);
406}
407
408static int qedi_alloc_fp(struct qedi_ctx *qedi)
409{
410 int ret = 0;
411
412 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
413 size: sizeof(struct qedi_fastpath), GFP_KERNEL);
414 if (!qedi->fp_array) {
415 QEDI_ERR(&qedi->dbg_ctx,
416 "fastpath fp array allocation failed.\n");
417 return -ENOMEM;
418 }
419
420 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
421 size: sizeof(struct qed_sb_info), GFP_KERNEL);
422 if (!qedi->sb_array) {
423 QEDI_ERR(&qedi->dbg_ctx,
424 "fastpath sb array allocation failed.\n");
425 ret = -ENOMEM;
426 goto free_fp;
427 }
428
429 return ret;
430
431free_fp:
432 qedi_free_fp(qedi);
433 return ret;
434}
435
436static void qedi_int_fp(struct qedi_ctx *qedi)
437{
438 struct qedi_fastpath *fp;
439 int id;
440
441 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
442 sizeof(*qedi->fp_array));
443 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
444 sizeof(*qedi->sb_array));
445
446 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
447 fp = &qedi->fp_array[id];
448 fp->sb_info = &qedi->sb_array[id];
449 fp->sb_id = id;
450 fp->qedi = qedi;
451 snprintf(buf: fp->name, size: sizeof(fp->name), fmt: "%s-fp-%d",
452 "qedi", id);
453
454 /* fp_array[i] ---- irq cookie
455 * So init data which is needed in int ctx
456 */
457 }
458}
459
460static int qedi_prepare_fp(struct qedi_ctx *qedi)
461{
462 struct qedi_fastpath *fp;
463 int id, ret = 0;
464
465 ret = qedi_alloc_fp(qedi);
466 if (ret)
467 goto err;
468
469 qedi_int_fp(qedi);
470
471 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
472 fp = &qedi->fp_array[id];
473 ret = qedi_alloc_and_init_sb(qedi, sb_info: fp->sb_info, sb_id: fp->sb_id);
474 if (ret) {
475 QEDI_ERR(&qedi->dbg_ctx,
476 "SB allocation and initialization failed.\n");
477 ret = -EIO;
478 goto err_init;
479 }
480 }
481
482 return 0;
483
484err_init:
485 qedi_free_sb(qedi);
486 qedi_free_fp(qedi);
487err:
488 return ret;
489}
490
491static int qedi_setup_cid_que(struct qedi_ctx *qedi)
492{
493 int i;
494
495 qedi->cid_que.cid_que_base = kmalloc_array(n: qedi->max_active_conns,
496 size: sizeof(u32), GFP_KERNEL);
497 if (!qedi->cid_que.cid_que_base)
498 return -ENOMEM;
499
500 qedi->cid_que.conn_cid_tbl = kmalloc_array(n: qedi->max_active_conns,
501 size: sizeof(struct qedi_conn *),
502 GFP_KERNEL);
503 if (!qedi->cid_que.conn_cid_tbl) {
504 kfree(objp: qedi->cid_que.cid_que_base);
505 qedi->cid_que.cid_que_base = NULL;
506 return -ENOMEM;
507 }
508
509 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
510 qedi->cid_que.cid_q_prod_idx = 0;
511 qedi->cid_que.cid_q_cons_idx = 0;
512 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
513 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
514
515 for (i = 0; i < qedi->max_active_conns; i++) {
516 qedi->cid_que.cid_que[i] = i;
517 qedi->cid_que.conn_cid_tbl[i] = NULL;
518 }
519
520 return 0;
521}
522
523static void qedi_release_cid_que(struct qedi_ctx *qedi)
524{
525 kfree(objp: qedi->cid_que.cid_que_base);
526 qedi->cid_que.cid_que_base = NULL;
527
528 kfree(objp: qedi->cid_que.conn_cid_tbl);
529 qedi->cid_que.conn_cid_tbl = NULL;
530}
531
532static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
533 u16 start_id, u16 next)
534{
535 id_tbl->start = start_id;
536 id_tbl->max = size;
537 id_tbl->next = next;
538 spin_lock_init(&id_tbl->lock);
539 id_tbl->table = kcalloc(BITS_TO_LONGS(size), size: sizeof(long), GFP_KERNEL);
540 if (!id_tbl->table)
541 return -ENOMEM;
542
543 return 0;
544}
545
546static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
547{
548 kfree(objp: id_tbl->table);
549 id_tbl->table = NULL;
550}
551
552int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
553{
554 int ret = -1;
555
556 id -= id_tbl->start;
557 if (id >= id_tbl->max)
558 return ret;
559
560 spin_lock(lock: &id_tbl->lock);
561 if (!test_bit(id, id_tbl->table)) {
562 set_bit(nr: id, addr: id_tbl->table);
563 ret = 0;
564 }
565 spin_unlock(lock: &id_tbl->lock);
566 return ret;
567}
568
569u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
570{
571 u16 id;
572
573 spin_lock(lock: &id_tbl->lock);
574 id = find_next_zero_bit(addr: id_tbl->table, size: id_tbl->max, offset: id_tbl->next);
575 if (id >= id_tbl->max) {
576 id = QEDI_LOCAL_PORT_INVALID;
577 if (id_tbl->next != 0) {
578 id = find_first_zero_bit(addr: id_tbl->table, size: id_tbl->next);
579 if (id >= id_tbl->next)
580 id = QEDI_LOCAL_PORT_INVALID;
581 }
582 }
583
584 if (id < id_tbl->max) {
585 set_bit(nr: id, addr: id_tbl->table);
586 id_tbl->next = (id + 1) & (id_tbl->max - 1);
587 id += id_tbl->start;
588 }
589
590 spin_unlock(lock: &id_tbl->lock);
591
592 return id;
593}
594
595void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
596{
597 if (id == QEDI_LOCAL_PORT_INVALID)
598 return;
599
600 id -= id_tbl->start;
601 if (id >= id_tbl->max)
602 return;
603
604 clear_bit(nr: id, addr: id_tbl->table);
605}
606
607static void qedi_cm_free_mem(struct qedi_ctx *qedi)
608{
609 kfree(objp: qedi->ep_tbl);
610 qedi->ep_tbl = NULL;
611 qedi_free_id_tbl(id_tbl: &qedi->lcl_port_tbl);
612}
613
614static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
615{
616 u16 port_id;
617
618 qedi->ep_tbl = kzalloc(size: (qedi->max_active_conns *
619 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
620 if (!qedi->ep_tbl)
621 return -ENOMEM;
622 port_id = get_random_u32_below(QEDI_LOCAL_PORT_RANGE);
623 if (qedi_init_id_tbl(id_tbl: &qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
624 QEDI_LOCAL_PORT_MIN, next: port_id)) {
625 qedi_cm_free_mem(qedi);
626 return -ENOMEM;
627 }
628
629 return 0;
630}
631
632static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
633{
634 struct Scsi_Host *shost;
635 struct qedi_ctx *qedi = NULL;
636
637 shost = iscsi_host_alloc(sht: &qedi_host_template,
638 dd_data_size: sizeof(struct qedi_ctx), xmit_can_sleep: 0);
639 if (!shost) {
640 QEDI_ERR(NULL, "Could not allocate shost\n");
641 goto exit_setup_shost;
642 }
643
644 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA - 1;
645 shost->max_channel = 0;
646 shost->max_lun = ~0;
647 shost->max_cmd_len = 16;
648 shost->transportt = qedi_scsi_transport;
649
650 qedi = iscsi_host_priv(shost);
651 memset(qedi, 0, sizeof(*qedi));
652 qedi->shost = shost;
653 qedi->dbg_ctx.host_no = shost->host_no;
654 qedi->pdev = pdev;
655 qedi->dbg_ctx.pdev = pdev;
656 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
657 qedi->max_sqes = QEDI_SQ_SIZE;
658
659 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
660
661 pci_set_drvdata(pdev, data: qedi);
662
663exit_setup_shost:
664 return qedi;
665}
666
667static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
668{
669 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
670 struct skb_work_list *work;
671 struct ethhdr *eh;
672
673 if (!qedi) {
674 QEDI_ERR(NULL, "qedi is NULL\n");
675 return -1;
676 }
677
678 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
679 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
680 "UIO DEV is not opened\n");
681 kfree_skb(skb);
682 return 0;
683 }
684
685 eh = (struct ethhdr *)skb->data;
686 /* Undo VLAN encapsulation */
687 if (eh->h_proto == htons(ETH_P_8021Q)) {
688 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
689 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
690 skb_reset_mac_header(skb);
691 }
692
693 /* Filter out non FIP/FCoE frames here to free them faster */
694 if (eh->h_proto != htons(ETH_P_ARP) &&
695 eh->h_proto != htons(ETH_P_IP) &&
696 eh->h_proto != htons(ETH_P_IPV6)) {
697 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
698 "Dropping frame ethertype [0x%x] len [0x%x].\n",
699 eh->h_proto, skb->len);
700 kfree_skb(skb);
701 return 0;
702 }
703
704 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
705 "Allowed frame ethertype [0x%x] len [0x%x].\n",
706 eh->h_proto, skb->len);
707
708 work = kzalloc(size: sizeof(*work), GFP_ATOMIC);
709 if (!work) {
710 QEDI_WARN(&qedi->dbg_ctx,
711 "Could not allocate work so dropping frame.\n");
712 kfree_skb(skb);
713 return 0;
714 }
715
716 INIT_LIST_HEAD(list: &work->list);
717 work->skb = skb;
718
719 if (skb_vlan_tag_present(skb))
720 work->vlan_id = skb_vlan_tag_get(skb);
721
722 if (work->vlan_id)
723 __vlan_insert_tag(skb: work->skb, htons(ETH_P_8021Q), vlan_tci: work->vlan_id);
724
725 spin_lock_bh(lock: &qedi->ll2_lock);
726 list_add_tail(new: &work->list, head: &qedi->ll2_skb_list);
727 spin_unlock_bh(lock: &qedi->ll2_lock);
728
729 wake_up_process(tsk: qedi->ll2_recv_thread);
730
731 return 0;
732}
733
734/* map this skb to iscsiuio mmaped region */
735static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
736 u16 vlan_id)
737{
738 struct qedi_uio_dev *udev = NULL;
739 struct qedi_uio_ctrl *uctrl = NULL;
740 struct qedi_rx_bd rxbd;
741 struct qedi_rx_bd *p_rxbd;
742 u32 rx_bd_prod;
743 void *pkt;
744 int len = 0;
745 u32 prod;
746
747 if (!qedi) {
748 QEDI_ERR(NULL, "qedi is NULL\n");
749 return -1;
750 }
751
752 udev = qedi->udev;
753 uctrl = udev->uctrl;
754
755 ++uctrl->hw_rx_prod_cnt;
756 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
757
758 pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
759 len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
760 memcpy(pkt, skb->data, len);
761
762 memset(&rxbd, 0, sizeof(rxbd));
763 rxbd.rx_pkt_index = prod;
764 rxbd.rx_pkt_len = len;
765 rxbd.vlan_id = vlan_id;
766
767 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
768 rx_bd_prod = uctrl->hw_rx_bd_prod;
769 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
770 p_rxbd += rx_bd_prod;
771
772 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
773
774 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
775 "hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
776 uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
777 rxbd.rx_pkt_index, rxbd.rx_pkt_len);
778 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
779 "host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
780 uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
781
782 uctrl->hw_rx_prod = prod;
783
784 /* notify the iscsiuio about new packet */
785 uio_event_notify(info: &udev->qedi_uinfo);
786
787 return 0;
788}
789
790static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
791{
792 struct skb_work_list *work, *work_tmp;
793
794 spin_lock_bh(lock: &qedi->ll2_lock);
795 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
796 list_del(entry: &work->list);
797 kfree_skb(skb: work->skb);
798 kfree(objp: work);
799 }
800 spin_unlock_bh(lock: &qedi->ll2_lock);
801}
802
803static int qedi_ll2_recv_thread(void *arg)
804{
805 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
806 struct skb_work_list *work, *work_tmp;
807
808 set_user_nice(current, nice: -20);
809
810 while (!kthread_should_stop()) {
811 spin_lock_bh(lock: &qedi->ll2_lock);
812 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
813 list) {
814 list_del(entry: &work->list);
815 qedi_ll2_process_skb(qedi, skb: work->skb, vlan_id: work->vlan_id);
816 kfree_skb(skb: work->skb);
817 kfree(objp: work);
818 }
819 set_current_state(TASK_INTERRUPTIBLE);
820 spin_unlock_bh(lock: &qedi->ll2_lock);
821 schedule();
822 }
823
824 __set_current_state(TASK_RUNNING);
825 return 0;
826}
827
828static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
829{
830 u8 num_sq_pages;
831 u32 log_page_size;
832 int rval = 0;
833
834
835 num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE;
836
837 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
838
839 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
840 "Number of CQ count is %d\n", qedi->num_queues);
841
842 memset(&qedi->pf_params.iscsi_pf_params, 0,
843 sizeof(qedi->pf_params.iscsi_pf_params));
844
845 qedi->p_cpuq = dma_alloc_coherent(dev: &qedi->pdev->dev,
846 size: qedi->num_queues * sizeof(struct qedi_glbl_q_params),
847 dma_handle: &qedi->hw_p_cpuq, GFP_KERNEL);
848 if (!qedi->p_cpuq) {
849 QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n");
850 rval = -1;
851 goto err_alloc_mem;
852 }
853
854 rval = qedi_alloc_global_queues(qedi);
855 if (rval) {
856 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
857 rval = -1;
858 goto err_alloc_mem;
859 }
860
861 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
862 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
863 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
864 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
865 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
866 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
867 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
868 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
869 qedi->pf_params.iscsi_pf_params.two_msl_timer = QED_TWO_MSL_TIMER_DFLT;
870 qedi->pf_params.iscsi_pf_params.tx_sws_timer = QED_TX_SWS_TIMER_DFLT;
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
900err_alloc_mem:
901 return rval;
902}
903
904/* Free DMA coherent memory for array of queue pointers we pass to qed */
905static 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(dev: &qedi->pdev->dev, size, cpu_addr: qedi->p_cpuq,
912 dma_handle: qedi->hw_p_cpuq);
913 }
914
915 qedi_free_global_queues(qedi);
916
917 kfree(objp: qedi->global_queues);
918}
919
920static 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(buf: tgt->iscsi_name, size: sizeof(tgt->iscsi_name), fmt: "%s",
929 block->target[index].target_name.byte);
930
931 tgt->ipv6_en = ipv6_en;
932
933 if (ipv6_en)
934 snprintf(buf: tgt->ip_addr, IPV6_LEN, fmt: "%pI6\n",
935 block->target[index].ipv6_addr.byte);
936 else
937 snprintf(buf: tgt->ip_addr, IPV4_LEN, fmt: "%pI4\n",
938 block->target[index].ipv4_addr.byte);
939}
940
941static 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(size: sizeof(*pri_tgt), GFP_KERNEL);
959 if (!pri_tgt)
960 return -1;
961 qedi_get_boot_tgt_info(block, tgt: pri_tgt, index: 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(size: sizeof(*sec_tgt), GFP_KERNEL);
968 if (!sec_tgt) {
969 ret = -1;
970 goto free_tgt;
971 }
972 qedi_get_boot_tgt_info(block, tgt: sec_tgt, index: 1);
973 }
974
975 for (i = 0; i < qedi->max_active_conns; i++) {
976 qedi_conn = qedi_get_conn_from_id(qedi, iscsi_cid: i);
977 if (!qedi_conn)
978 continue;
979
980 if (qedi_conn->ep->ip_type == TCP_IPV4)
981 snprintf(buf: ep_ip_addr, IPV4_LEN, fmt: "%pI4\n",
982 qedi_conn->ep->dst_addr);
983 else
984 snprintf(buf: ep_ip_addr, IPV6_LEN, fmt: "%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(session: 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(objp: sec_tgt);
1034free_tgt:
1035 if (pri_ctrl_flags)
1036 kfree(objp: pri_tgt);
1037
1038 return ret;
1039}
1040
1041static 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(dst: data->mac[0], src: qedi->mac);
1054}
1055
1056/*
1057 * Protocol TLV handler
1058 */
1059static 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(size: 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(lock: &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(objp: fw_iscsi_stats);
1117exit_get_data:
1118 return;
1119}
1120
1121void 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(dwork: &qedi->board_disable_work, delay: 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
1157static 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, addr: &qedi->flags))
1164 return;
1165
1166 atomic_set(v: &qedi->link_state, QEDI_LINK_DOWN);
1167
1168 schedule_delayed_work(dwork: &qedi->recovery_work, delay: 0);
1169}
1170
1171static 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: qedi_conn->qedi, qedi_conn);
1178}
1179
1180static 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(v: &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(v: &qedi->link_state, QEDI_LINK_DOWN);
1191 iscsi_host_for_each_session(shost: qedi->shost, fn: qedi_set_conn_recovery);
1192 }
1193}
1194
1195static 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
1205static 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, tid: cqe->cqe_solicited.itid);
1227 if (!qedi_cmd) {
1228 rc = -1;
1229 break;
1230 }
1231 INIT_LIST_HEAD(list: &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(new: &qedi_cmd->cqe_work.list, head: &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(size: sizeof(*qedi_work), GFP_ATOMIC);
1242 if (!qedi_work) {
1243 rc = -1;
1244 break;
1245 }
1246 INIT_LIST_HEAD(list: &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(new: &qedi_work->list, head: &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
1260static 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 *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, que_idx: 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(tsk: p->iothread);
1310 spin_unlock_irqrestore(lock: &p->p_work_lock, flags);
1311
1312 return true;
1313}
1314
1315static 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 *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 */
1339static 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(sb_info: fp->sb_info, int_cmd: IGU_INT_DISABLE, upd_flg: 0);
1346
1347process_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(sb_info: fp->sb_info);
1356
1357 /* Check for more work */
1358 rmb();
1359
1360 if (!qedi_fp_has_work(fp))
1361 qed_sb_ack(sb_info: fp->sb_info, int_cmd: IGU_INT_ENABLE, upd_flg: 1);
1362 else
1363 goto process_again;
1364
1365 return IRQ_HANDLED;
1366}
1367
1368/* simd handler for MSI/INTa */
1369static 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
1378static 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(irq: qedi->int_info.msix[idx].vector);
1392 irq_set_affinity_hint(irq: 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
1406static 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(irq: qedi->int_info.msix[idx].vector,
1422 handler: qedi_msix_handler, flags: 0, name: "qedi",
1423 dev: &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(irq: qedi->int_info.msix[idx].vector,
1431 m: get_cpu_mask(cpu));
1432 cpu = cpumask_next(n: cpu, cpu_online_mask);
1433 }
1434
1435 return 0;
1436}
1437
1438static 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
1466exit_setup_int:
1467 return rc;
1468}
1469
1470static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1471{
1472 if (qedi->iscsi_image)
1473 dma_free_coherent(dev: &qedi->pdev->dev,
1474 size: sizeof(struct qedi_nvm_iscsi_image),
1475 cpu_addr: qedi->iscsi_image, dma_handle: qedi->nvm_buf_dma);
1476}
1477
1478static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1479{
1480 qedi->iscsi_image = dma_alloc_coherent(dev: &qedi->pdev->dev,
1481 size: sizeof(struct qedi_nvm_iscsi_image),
1482 dma_handle: &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
1494static void qedi_free_bdq(struct qedi_ctx *qedi)
1495{
1496 int i;
1497
1498 if (qedi->bdq_pbl_list)
1499 dma_free_coherent(dev: &qedi->pdev->dev, QEDI_PAGE_SIZE,
1500 cpu_addr: qedi->bdq_pbl_list, dma_handle: qedi->bdq_pbl_list_dma);
1501
1502 if (qedi->bdq_pbl)
1503 dma_free_coherent(dev: &qedi->pdev->dev, size: qedi->bdq_pbl_mem_size,
1504 cpu_addr: qedi->bdq_pbl, dma_handle: 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(dev: &qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1509 cpu_addr: qedi->bdq[i].buf_addr,
1510 dma_handle: qedi->bdq[i].buf_dma);
1511 }
1512 }
1513}
1514
1515static 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(dev: &qedi->pdev->dev, size: gl[i]->cq_mem_size,
1526 cpu_addr: gl[i]->cq, dma_handle: gl[i]->cq_dma);
1527 if (gl[i]->cq_pbl)
1528 dma_free_coherent(dev: &qedi->pdev->dev, size: gl[i]->cq_pbl_size,
1529 cpu_addr: gl[i]->cq_pbl, dma_handle: gl[i]->cq_pbl_dma);
1530
1531 kfree(objp: gl[i]);
1532 }
1533 qedi_free_bdq(qedi);
1534 qedi_free_nvm_iscsi_cfg(qedi);
1535}
1536
1537static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1538{
1539 int i;
1540 struct scsi_bd *pbl;
1541 u64 *list;
1542
1543 /* Alloc dma memory for BDQ buffers */
1544 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1545 qedi->bdq[i].buf_addr =
1546 dma_alloc_coherent(dev: &qedi->pdev->dev,
1547 QEDI_BDQ_BUF_SIZE,
1548 dma_handle: &qedi->bdq[i].buf_dma,
1549 GFP_KERNEL);
1550 if (!qedi->bdq[i].buf_addr) {
1551 QEDI_ERR(&qedi->dbg_ctx,
1552 "Could not allocate BDQ buffer %d.\n", i);
1553 return -ENOMEM;
1554 }
1555 }
1556
1557 /* Alloc dma memory for BDQ page buffer list */
1558 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1559 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, QEDI_PAGE_SIZE);
1560 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1561
1562 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1563 qedi->rq_num_entries);
1564
1565 qedi->bdq_pbl = dma_alloc_coherent(dev: &qedi->pdev->dev,
1566 size: qedi->bdq_pbl_mem_size,
1567 dma_handle: &qedi->bdq_pbl_dma, GFP_KERNEL);
1568 if (!qedi->bdq_pbl) {
1569 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1570 return -ENOMEM;
1571 }
1572
1573 /*
1574 * Populate BDQ PBL with physical and virtual address of individual
1575 * BDQ buffers
1576 */
1577 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1578 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1579 pbl->address.hi =
1580 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1581 pbl->address.lo =
1582 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1583 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1584 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1585 pbl, pbl->address.hi, pbl->address.lo, i);
1586 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1587 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1588 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1589 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1590 pbl++;
1591 }
1592
1593 /* Allocate list of PBL pages */
1594 qedi->bdq_pbl_list = dma_alloc_coherent(dev: &qedi->pdev->dev,
1595 QEDI_PAGE_SIZE,
1596 dma_handle: &qedi->bdq_pbl_list_dma,
1597 GFP_KERNEL);
1598 if (!qedi->bdq_pbl_list) {
1599 QEDI_ERR(&qedi->dbg_ctx,
1600 "Could not allocate list of PBL pages.\n");
1601 return -ENOMEM;
1602 }
1603
1604 /*
1605 * Now populate PBL list with pages that contain pointers to the
1606 * individual buffers.
1607 */
1608 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size /
1609 QEDI_PAGE_SIZE;
1610 list = (u64 *)qedi->bdq_pbl_list;
1611 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1612 *list = qedi->bdq_pbl_dma;
1613 list++;
1614 }
1615
1616 return 0;
1617}
1618
1619static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1620{
1621 u32 *list;
1622 int i;
1623 int status;
1624 u32 *pbl;
1625 dma_addr_t page;
1626 int num_pages;
1627
1628 /*
1629 * Number of global queues (CQ / RQ). This should
1630 * be <= number of available MSIX vectors for the PF
1631 */
1632 if (!qedi->num_queues) {
1633 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1634 return -ENOMEM;
1635 }
1636
1637 /* Make sure we allocated the PBL that will contain the physical
1638 * addresses of our queues
1639 */
1640 if (!qedi->p_cpuq) {
1641 status = -EINVAL;
1642 goto mem_alloc_failure;
1643 }
1644
1645 qedi->global_queues = kzalloc(size: (sizeof(struct global_queue *) *
1646 qedi->num_queues), GFP_KERNEL);
1647 if (!qedi->global_queues) {
1648 QEDI_ERR(&qedi->dbg_ctx,
1649 "Unable to allocate global queues array ptr memory\n");
1650 return -ENOMEM;
1651 }
1652 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1653 "qedi->global_queues=%p.\n", qedi->global_queues);
1654
1655 /* Allocate DMA coherent buffers for BDQ */
1656 status = qedi_alloc_bdq(qedi);
1657 if (status)
1658 goto mem_alloc_failure;
1659
1660 /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1661 status = qedi_alloc_nvm_iscsi_cfg(qedi);
1662 if (status)
1663 goto mem_alloc_failure;
1664
1665 /* Allocate a CQ and an associated PBL for each MSI-X
1666 * vector.
1667 */
1668 for (i = 0; i < qedi->num_queues; i++) {
1669 qedi->global_queues[i] =
1670 kzalloc(size: sizeof(*qedi->global_queues[0]),
1671 GFP_KERNEL);
1672 if (!qedi->global_queues[i]) {
1673 QEDI_ERR(&qedi->dbg_ctx,
1674 "Unable to allocation global queue %d.\n", i);
1675 status = -ENOMEM;
1676 goto mem_alloc_failure;
1677 }
1678
1679 qedi->global_queues[i]->cq_mem_size =
1680 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1681 qedi->global_queues[i]->cq_mem_size =
1682 (qedi->global_queues[i]->cq_mem_size +
1683 (QEDI_PAGE_SIZE - 1));
1684
1685 qedi->global_queues[i]->cq_pbl_size =
1686 (qedi->global_queues[i]->cq_mem_size /
1687 QEDI_PAGE_SIZE) * sizeof(void *);
1688 qedi->global_queues[i]->cq_pbl_size =
1689 (qedi->global_queues[i]->cq_pbl_size +
1690 (QEDI_PAGE_SIZE - 1));
1691
1692 qedi->global_queues[i]->cq = dma_alloc_coherent(dev: &qedi->pdev->dev,
1693 size: qedi->global_queues[i]->cq_mem_size,
1694 dma_handle: &qedi->global_queues[i]->cq_dma,
1695 GFP_KERNEL);
1696
1697 if (!qedi->global_queues[i]->cq) {
1698 QEDI_WARN(&qedi->dbg_ctx,
1699 "Could not allocate cq.\n");
1700 status = -ENOMEM;
1701 goto mem_alloc_failure;
1702 }
1703 qedi->global_queues[i]->cq_pbl = dma_alloc_coherent(dev: &qedi->pdev->dev,
1704 size: qedi->global_queues[i]->cq_pbl_size,
1705 dma_handle: &qedi->global_queues[i]->cq_pbl_dma,
1706 GFP_KERNEL);
1707
1708 if (!qedi->global_queues[i]->cq_pbl) {
1709 QEDI_WARN(&qedi->dbg_ctx,
1710 "Could not allocate cq PBL.\n");
1711 status = -ENOMEM;
1712 goto mem_alloc_failure;
1713 }
1714
1715 /* Create PBL */
1716 num_pages = qedi->global_queues[i]->cq_mem_size /
1717 QEDI_PAGE_SIZE;
1718 page = qedi->global_queues[i]->cq_dma;
1719 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1720
1721 while (num_pages--) {
1722 *pbl = (u32)page;
1723 pbl++;
1724 *pbl = (u32)((u64)page >> 32);
1725 pbl++;
1726 page += QEDI_PAGE_SIZE;
1727 }
1728 }
1729
1730 list = (u32 *)qedi->p_cpuq;
1731
1732 /*
1733 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1734 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1735 * to the physical address which contains an array of pointers to the
1736 * physical addresses of the specific queue pages.
1737 */
1738 for (i = 0; i < qedi->num_queues; i++) {
1739 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1740 list++;
1741 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1742 list++;
1743
1744 *list = (u32)0;
1745 list++;
1746 *list = (u32)((u64)0 >> 32);
1747 list++;
1748 }
1749
1750 return 0;
1751
1752mem_alloc_failure:
1753 qedi_free_global_queues(qedi);
1754 return status;
1755}
1756
1757int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1758{
1759 int rval = 0;
1760 u32 *pbl;
1761 dma_addr_t page;
1762 int num_pages;
1763
1764 if (!ep)
1765 return -EIO;
1766
1767 /* Calculate appropriate queue and PBL sizes */
1768 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1769 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1770
1771 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1772 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1773
1774 ep->sq = dma_alloc_coherent(dev: &qedi->pdev->dev, size: ep->sq_mem_size,
1775 dma_handle: &ep->sq_dma, GFP_KERNEL);
1776 if (!ep->sq) {
1777 QEDI_WARN(&qedi->dbg_ctx,
1778 "Could not allocate send queue.\n");
1779 rval = -ENOMEM;
1780 goto out;
1781 }
1782 ep->sq_pbl = dma_alloc_coherent(dev: &qedi->pdev->dev, size: ep->sq_pbl_size,
1783 dma_handle: &ep->sq_pbl_dma, GFP_KERNEL);
1784 if (!ep->sq_pbl) {
1785 QEDI_WARN(&qedi->dbg_ctx,
1786 "Could not allocate send queue PBL.\n");
1787 rval = -ENOMEM;
1788 goto out_free_sq;
1789 }
1790
1791 /* Create PBL */
1792 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1793 page = ep->sq_dma;
1794 pbl = (u32 *)ep->sq_pbl;
1795
1796 while (num_pages--) {
1797 *pbl = (u32)page;
1798 pbl++;
1799 *pbl = (u32)((u64)page >> 32);
1800 pbl++;
1801 page += QEDI_PAGE_SIZE;
1802 }
1803
1804 return rval;
1805
1806out_free_sq:
1807 dma_free_coherent(dev: &qedi->pdev->dev, size: ep->sq_mem_size, cpu_addr: ep->sq,
1808 dma_handle: ep->sq_dma);
1809out:
1810 return rval;
1811}
1812
1813void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1814{
1815 if (ep->sq_pbl)
1816 dma_free_coherent(dev: &qedi->pdev->dev, size: ep->sq_pbl_size, cpu_addr: ep->sq_pbl,
1817 dma_handle: ep->sq_pbl_dma);
1818 if (ep->sq)
1819 dma_free_coherent(dev: &qedi->pdev->dev, size: ep->sq_mem_size, cpu_addr: ep->sq,
1820 dma_handle: ep->sq_dma);
1821}
1822
1823int qedi_get_task_idx(struct qedi_ctx *qedi)
1824{
1825 s16 tmp_idx;
1826
1827again:
1828 tmp_idx = find_first_zero_bit(addr: qedi->task_idx_map,
1829 MAX_ISCSI_TASK_ENTRIES);
1830
1831 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1832 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1833 tmp_idx = -1;
1834 goto err_idx;
1835 }
1836
1837 if (test_and_set_bit(nr: tmp_idx, addr: qedi->task_idx_map))
1838 goto again;
1839
1840err_idx:
1841 return tmp_idx;
1842}
1843
1844void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1845{
1846 if (!test_and_clear_bit(nr: idx, addr: qedi->task_idx_map))
1847 QEDI_ERR(&qedi->dbg_ctx,
1848 "FW task context, already cleared, tid=0x%x\n", idx);
1849}
1850
1851void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1852 struct qedi_cmd *cmd)
1853{
1854 qedi->itt_map[tid].itt = proto_itt;
1855 qedi->itt_map[tid].p_cmd = cmd;
1856
1857 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1858 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1859 qedi->itt_map[tid].itt);
1860}
1861
1862void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1863{
1864 u16 i;
1865
1866 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1867 if (qedi->itt_map[i].itt == itt) {
1868 *tid = i;
1869 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1870 "Ref itt=0x%x, found at tid=0x%x\n",
1871 itt, *tid);
1872 return;
1873 }
1874 }
1875
1876 WARN_ON(1);
1877}
1878
1879void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1880{
1881 *proto_itt = qedi->itt_map[tid].itt;
1882 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1883 "Get itt map tid [0x%x with proto itt[0x%x]",
1884 tid, *proto_itt);
1885}
1886
1887struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1888{
1889 struct qedi_cmd *cmd = NULL;
1890
1891 if (tid >= MAX_ISCSI_TASK_ENTRIES)
1892 return NULL;
1893
1894 cmd = qedi->itt_map[tid].p_cmd;
1895 if (cmd->task_id != tid)
1896 return NULL;
1897
1898 qedi->itt_map[tid].p_cmd = NULL;
1899
1900 return cmd;
1901}
1902
1903static int qedi_alloc_itt(struct qedi_ctx *qedi)
1904{
1905 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1906 size: sizeof(struct qedi_itt_map), GFP_KERNEL);
1907 if (!qedi->itt_map) {
1908 QEDI_ERR(&qedi->dbg_ctx,
1909 "Unable to allocate itt map array memory\n");
1910 return -ENOMEM;
1911 }
1912 return 0;
1913}
1914
1915static void qedi_free_itt(struct qedi_ctx *qedi)
1916{
1917 kfree(objp: qedi->itt_map);
1918}
1919
1920static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1921 .rx_cb = qedi_ll2_rx,
1922 .tx_cb = NULL,
1923};
1924
1925static int qedi_percpu_io_thread(void *arg)
1926{
1927 struct qedi_percpu_s *p = arg;
1928 struct qedi_work *work, *tmp;
1929 unsigned long flags;
1930 LIST_HEAD(work_list);
1931
1932 set_user_nice(current, nice: -20);
1933
1934 while (!kthread_should_stop()) {
1935 spin_lock_irqsave(&p->p_work_lock, flags);
1936 while (!list_empty(head: &p->work_list)) {
1937 list_splice_init(list: &p->work_list, head: &work_list);
1938 spin_unlock_irqrestore(lock: &p->p_work_lock, flags);
1939
1940 list_for_each_entry_safe(work, tmp, &work_list, list) {
1941 list_del_init(entry: &work->list);
1942 qedi_fp_process_cqes(work);
1943 if (!work->is_solicited)
1944 kfree(objp: work);
1945 }
1946 cond_resched();
1947 spin_lock_irqsave(&p->p_work_lock, flags);
1948 }
1949 set_current_state(TASK_INTERRUPTIBLE);
1950 spin_unlock_irqrestore(lock: &p->p_work_lock, flags);
1951 schedule();
1952 }
1953 __set_current_state(TASK_RUNNING);
1954
1955 return 0;
1956}
1957
1958static int qedi_cpu_online(unsigned int cpu)
1959{
1960 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1961 struct task_struct *thread;
1962
1963 thread = kthread_create_on_node(threadfn: qedi_percpu_io_thread, data: (void *)p,
1964 cpu_to_node(cpu),
1965 namefmt: "qedi_thread/%d", cpu);
1966 if (IS_ERR(ptr: thread))
1967 return PTR_ERR(ptr: thread);
1968
1969 kthread_bind(k: thread, cpu);
1970 p->iothread = thread;
1971 wake_up_process(tsk: thread);
1972 return 0;
1973}
1974
1975static int qedi_cpu_offline(unsigned int cpu)
1976{
1977 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1978 struct qedi_work *work, *tmp;
1979 struct task_struct *thread;
1980 unsigned long flags;
1981
1982 spin_lock_irqsave(&p->p_work_lock, flags);
1983 thread = p->iothread;
1984 p->iothread = NULL;
1985
1986 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1987 list_del_init(entry: &work->list);
1988 qedi_fp_process_cqes(work);
1989 if (!work->is_solicited)
1990 kfree(objp: work);
1991 }
1992
1993 spin_unlock_irqrestore(lock: &p->p_work_lock, flags);
1994 if (thread)
1995 kthread_stop(k: thread);
1996 return 0;
1997}
1998
1999void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
2000{
2001 struct qed_ll2_params params;
2002
2003 qedi_recover_all_conns(qedi);
2004
2005 qedi_ops->ll2->stop(qedi->cdev);
2006 qedi_ll2_free_skbs(qedi);
2007
2008 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
2009 qedi->ll2_mtu, mtu);
2010 memset(&params, 0, sizeof(params));
2011 qedi->ll2_mtu = mtu;
2012 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
2013 params.drop_ttl0_packets = 0;
2014 params.rx_vlan_stripping = 1;
2015 ether_addr_copy(dst: params.ll2_mac_address, src: qedi->dev_info.common.hw_mac);
2016 qedi_ops->ll2->start(qedi->cdev, &params);
2017}
2018
2019/*
2020 * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
2021 * for gaps) for the matching absolute-pf-id of the QEDI device.
2022 */
2023static struct nvm_iscsi_block *
2024qedi_get_nvram_block(struct qedi_ctx *qedi)
2025{
2026 int i;
2027 u8 pf;
2028 u32 flags;
2029 struct nvm_iscsi_block *block;
2030
2031 pf = qedi->dev_info.common.abs_pf_id;
2032 block = &qedi->iscsi_image->iscsi_cfg.block[0];
2033 for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
2034 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
2035 NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
2036 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
2037 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
2038 (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
2039 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
2040 return block;
2041 }
2042 return NULL;
2043}
2044
2045static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
2046{
2047 struct qedi_ctx *qedi = data;
2048 struct nvm_iscsi_initiator *initiator;
2049 int rc = 1;
2050 u32 ipv6_en, dhcp_en, ip_len;
2051 struct nvm_iscsi_block *block;
2052 char *fmt, *ip, *sub, *gw;
2053
2054 block = qedi_get_nvram_block(qedi);
2055 if (!block)
2056 return 0;
2057
2058 initiator = &block->initiator;
2059 ipv6_en = block->generic.ctrl_flags &
2060 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2061 dhcp_en = block->generic.ctrl_flags &
2062 NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
2063 /* Static IP assignments. */
2064 fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
2065 ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
2066 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2067 sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
2068 initiator->ipv4.subnet_mask.byte;
2069 gw = ipv6_en ? initiator->ipv6.gateway.byte :
2070 initiator->ipv4.gateway.byte;
2071 /* DHCP IP adjustments. */
2072 fmt = dhcp_en ? "%s\n" : fmt;
2073 if (dhcp_en) {
2074 ip = ipv6_en ? "0::0" : "0.0.0.0";
2075 sub = ip;
2076 gw = ip;
2077 ip_len = ipv6_en ? 5 : 8;
2078 }
2079
2080 switch (type) {
2081 case ISCSI_BOOT_ETH_IP_ADDR:
2082 rc = snprintf(buf, size: ip_len, fmt, ip);
2083 break;
2084 case ISCSI_BOOT_ETH_SUBNET_MASK:
2085 rc = snprintf(buf, size: ip_len, fmt, sub);
2086 break;
2087 case ISCSI_BOOT_ETH_GATEWAY:
2088 rc = snprintf(buf, size: ip_len, fmt, gw);
2089 break;
2090 case ISCSI_BOOT_ETH_FLAGS:
2091 rc = snprintf(buf, size: 3, fmt: "%d\n", (char)SYSFS_FLAG_FW_SEL_BOOT);
2092 break;
2093 case ISCSI_BOOT_ETH_INDEX:
2094 rc = snprintf(buf, size: 3, fmt: "0\n");
2095 break;
2096 case ISCSI_BOOT_ETH_MAC:
2097 rc = sysfs_format_mac(buf, addr: qedi->mac, ETH_ALEN);
2098 break;
2099 case ISCSI_BOOT_ETH_VLAN:
2100 rc = snprintf(buf, size: 12, fmt: "%d\n",
2101 GET_FIELD2(initiator->generic_cont0,
2102 NVM_ISCSI_CFG_INITIATOR_VLAN));
2103 break;
2104 case ISCSI_BOOT_ETH_ORIGIN:
2105 if (dhcp_en)
2106 rc = snprintf(buf, size: 3, fmt: "3\n");
2107 break;
2108 default:
2109 rc = 0;
2110 break;
2111 }
2112
2113 return rc;
2114}
2115
2116static umode_t qedi_eth_get_attr_visibility(void *data, int type)
2117{
2118 int rc = 1;
2119
2120 switch (type) {
2121 case ISCSI_BOOT_ETH_FLAGS:
2122 case ISCSI_BOOT_ETH_MAC:
2123 case ISCSI_BOOT_ETH_INDEX:
2124 case ISCSI_BOOT_ETH_IP_ADDR:
2125 case ISCSI_BOOT_ETH_SUBNET_MASK:
2126 case ISCSI_BOOT_ETH_GATEWAY:
2127 case ISCSI_BOOT_ETH_ORIGIN:
2128 case ISCSI_BOOT_ETH_VLAN:
2129 rc = 0444;
2130 break;
2131 default:
2132 rc = 0;
2133 break;
2134 }
2135 return rc;
2136}
2137
2138static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2139{
2140 struct qedi_ctx *qedi = data;
2141 struct nvm_iscsi_initiator *initiator;
2142 int rc;
2143 struct nvm_iscsi_block *block;
2144
2145 block = qedi_get_nvram_block(qedi);
2146 if (!block)
2147 return 0;
2148
2149 initiator = &block->initiator;
2150
2151 switch (type) {
2152 case ISCSI_BOOT_INI_INITIATOR_NAME:
2153 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2154 initiator->initiator_name.byte);
2155 break;
2156 default:
2157 rc = 0;
2158 break;
2159 }
2160 return rc;
2161}
2162
2163static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2164{
2165 int rc;
2166
2167 switch (type) {
2168 case ISCSI_BOOT_INI_INITIATOR_NAME:
2169 rc = 0444;
2170 break;
2171 default:
2172 rc = 0;
2173 break;
2174 }
2175 return rc;
2176}
2177
2178static ssize_t
2179qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2180 char *buf, enum qedi_nvm_tgts idx)
2181{
2182 int rc = 1;
2183 u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2184 struct nvm_iscsi_block *block;
2185 char *chap_name, *chap_secret;
2186 char *mchap_name, *mchap_secret;
2187
2188 block = qedi_get_nvram_block(qedi);
2189 if (!block)
2190 goto exit_show_tgt_info;
2191
2192 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2193 "Port:%d, tgt_idx:%d\n",
2194 GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2195
2196 ctrl_flags = block->target[idx].ctrl_flags &
2197 NVM_ISCSI_CFG_TARGET_ENABLED;
2198
2199 if (!ctrl_flags) {
2200 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2201 "Target disabled\n");
2202 goto exit_show_tgt_info;
2203 }
2204
2205 ipv6_en = block->generic.ctrl_flags &
2206 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2207 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2208 chap_en = block->generic.ctrl_flags &
2209 NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2210 chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2211 chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2212
2213 mchap_en = block->generic.ctrl_flags &
2214 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2215 mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2216 mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2217
2218 switch (type) {
2219 case ISCSI_BOOT_TGT_NAME:
2220 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2221 block->target[idx].target_name.byte);
2222 break;
2223 case ISCSI_BOOT_TGT_IP_ADDR:
2224 if (ipv6_en)
2225 rc = snprintf(buf, size: ip_len, fmt: "%pI6\n",
2226 block->target[idx].ipv6_addr.byte);
2227 else
2228 rc = snprintf(buf, size: ip_len, fmt: "%pI4\n",
2229 block->target[idx].ipv4_addr.byte);
2230 break;
2231 case ISCSI_BOOT_TGT_PORT:
2232 rc = snprintf(buf, size: 12, fmt: "%d\n",
2233 GET_FIELD2(block->target[idx].generic_cont0,
2234 NVM_ISCSI_CFG_TARGET_TCP_PORT));
2235 break;
2236 case ISCSI_BOOT_TGT_LUN:
2237 rc = snprintf(buf, size: 22, fmt: "%.*d\n",
2238 block->target[idx].lun.value[1],
2239 block->target[idx].lun.value[0]);
2240 break;
2241 case ISCSI_BOOT_TGT_CHAP_NAME:
2242 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2243 chap_name);
2244 break;
2245 case ISCSI_BOOT_TGT_CHAP_SECRET:
2246 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN,
2247 chap_secret);
2248 break;
2249 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2250 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2251 mchap_name);
2252 break;
2253 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2254 rc = sprintf(buf, fmt: "%.*s\n", NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN,
2255 mchap_secret);
2256 break;
2257 case ISCSI_BOOT_TGT_FLAGS:
2258 rc = snprintf(buf, size: 3, fmt: "%d\n", (char)SYSFS_FLAG_FW_SEL_BOOT);
2259 break;
2260 case ISCSI_BOOT_TGT_NIC_ASSOC:
2261 rc = snprintf(buf, size: 3, fmt: "0\n");
2262 break;
2263 default:
2264 rc = 0;
2265 break;
2266 }
2267
2268exit_show_tgt_info:
2269 return rc;
2270}
2271
2272static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2273{
2274 struct qedi_ctx *qedi = data;
2275
2276 return qedi_show_boot_tgt_info(qedi, type, buf, idx: QEDI_NVM_TGT_PRI);
2277}
2278
2279static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2280{
2281 struct qedi_ctx *qedi = data;
2282
2283 return qedi_show_boot_tgt_info(qedi, type, buf, idx: QEDI_NVM_TGT_SEC);
2284}
2285
2286static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2287{
2288 int rc;
2289
2290 switch (type) {
2291 case ISCSI_BOOT_TGT_NAME:
2292 case ISCSI_BOOT_TGT_IP_ADDR:
2293 case ISCSI_BOOT_TGT_PORT:
2294 case ISCSI_BOOT_TGT_LUN:
2295 case ISCSI_BOOT_TGT_CHAP_NAME:
2296 case ISCSI_BOOT_TGT_CHAP_SECRET:
2297 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2298 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2299 case ISCSI_BOOT_TGT_NIC_ASSOC:
2300 case ISCSI_BOOT_TGT_FLAGS:
2301 rc = 0444;
2302 break;
2303 default:
2304 rc = 0;
2305 break;
2306 }
2307 return rc;
2308}
2309
2310static void qedi_boot_release(void *data)
2311{
2312 struct qedi_ctx *qedi = data;
2313
2314 scsi_host_put(t: qedi->shost);
2315}
2316
2317static int qedi_get_boot_info(struct qedi_ctx *qedi)
2318{
2319 int ret = 1;
2320
2321 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2322 "Get NVM iSCSI CFG image\n");
2323 ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2324 QED_NVM_IMAGE_ISCSI_CFG,
2325 (char *)qedi->iscsi_image,
2326 sizeof(struct qedi_nvm_iscsi_image));
2327 if (ret)
2328 QEDI_ERR(&qedi->dbg_ctx,
2329 "Could not get NVM image. ret = %d\n", ret);
2330
2331 return ret;
2332}
2333
2334static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2335{
2336 struct iscsi_boot_kobj *boot_kobj;
2337
2338 if (qedi_get_boot_info(qedi))
2339 return -EPERM;
2340
2341 qedi->boot_kset = iscsi_boot_create_host_kset(hostno: qedi->shost->host_no);
2342 if (!qedi->boot_kset)
2343 goto kset_free;
2344
2345 if (!scsi_host_get(qedi->shost))
2346 goto kset_free;
2347
2348 boot_kobj = iscsi_boot_create_target(boot_kset: qedi->boot_kset, index: 0, data: qedi,
2349 show: qedi_show_boot_tgt_pri_info,
2350 is_visible: qedi_tgt_get_attr_visibility,
2351 release: qedi_boot_release);
2352 if (!boot_kobj)
2353 goto put_host;
2354
2355 if (!scsi_host_get(qedi->shost))
2356 goto kset_free;
2357
2358 boot_kobj = iscsi_boot_create_target(boot_kset: qedi->boot_kset, index: 1, data: qedi,
2359 show: qedi_show_boot_tgt_sec_info,
2360 is_visible: qedi_tgt_get_attr_visibility,
2361 release: qedi_boot_release);
2362 if (!boot_kobj)
2363 goto put_host;
2364
2365 if (!scsi_host_get(qedi->shost))
2366 goto kset_free;
2367
2368 boot_kobj = iscsi_boot_create_initiator(boot_kset: qedi->boot_kset, index: 0, data: qedi,
2369 show: qedi_show_boot_ini_info,
2370 is_visible: qedi_ini_get_attr_visibility,
2371 release: qedi_boot_release);
2372 if (!boot_kobj)
2373 goto put_host;
2374
2375 if (!scsi_host_get(qedi->shost))
2376 goto kset_free;
2377
2378 boot_kobj = iscsi_boot_create_ethernet(boot_kset: qedi->boot_kset, index: 0, data: qedi,
2379 show: qedi_show_boot_eth_info,
2380 is_visible: qedi_eth_get_attr_visibility,
2381 release: qedi_boot_release);
2382 if (!boot_kobj)
2383 goto put_host;
2384
2385 return 0;
2386
2387put_host:
2388 scsi_host_put(t: qedi->shost);
2389kset_free:
2390 iscsi_boot_destroy_kset(boot_kset: qedi->boot_kset);
2391 return -ENOMEM;
2392}
2393
2394static pci_ers_result_t qedi_io_error_detected(struct pci_dev *pdev,
2395 pci_channel_state_t state)
2396{
2397 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2398
2399 QEDI_ERR(&qedi->dbg_ctx, "%s: PCI error detected [%d]\n",
2400 __func__, state);
2401
2402 if (test_and_set_bit(QEDI_IN_RECOVERY, addr: &qedi->flags)) {
2403 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2404 "Recovery already in progress.\n");
2405 return PCI_ERS_RESULT_NONE;
2406 }
2407
2408 qedi_ops->common->recovery_process(qedi->cdev);
2409
2410 return PCI_ERS_RESULT_CAN_RECOVER;
2411}
2412
2413static void __qedi_remove(struct pci_dev *pdev, int mode)
2414{
2415 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2416 int rval;
2417 u16 retry = 10;
2418
2419 if (mode == QEDI_MODE_NORMAL)
2420 iscsi_host_remove(shost: qedi->shost, is_shutdown: false);
2421 else if (mode == QEDI_MODE_SHUTDOWN)
2422 iscsi_host_remove(shost: qedi->shost, is_shutdown: true);
2423
2424 if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) {
2425 if (qedi->tmf_thread) {
2426 destroy_workqueue(wq: qedi->tmf_thread);
2427 qedi->tmf_thread = NULL;
2428 }
2429
2430 if (qedi->offload_thread) {
2431 destroy_workqueue(wq: qedi->offload_thread);
2432 qedi->offload_thread = NULL;
2433 }
2434 }
2435
2436#ifdef CONFIG_DEBUG_FS
2437 qedi_dbg_host_exit(qedi: &qedi->dbg_ctx);
2438#endif
2439 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2440 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2441
2442 qedi_sync_free_irqs(qedi);
2443
2444 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2445 while (retry--) {
2446 rval = qedi_ops->stop(qedi->cdev);
2447 if (rval < 0)
2448 msleep(msecs: 1000);
2449 else
2450 break;
2451 }
2452 qedi_ops->ll2->stop(qedi->cdev);
2453 }
2454
2455 cancel_delayed_work_sync(dwork: &qedi->recovery_work);
2456 cancel_delayed_work_sync(dwork: &qedi->board_disable_work);
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(udev: qedi->udev);
2475 qedi_free_itt(qedi);
2476
2477 if (qedi->ll2_recv_thread) {
2478 kthread_stop(k: 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(boot_kset: qedi->boot_kset);
2485
2486 iscsi_host_free(shost: qedi->shost);
2487 }
2488}
2489
2490static void qedi_board_disable_work(struct work_struct *work)
2491{
2492 struct qedi_ctx *qedi =
2493 container_of(work, struct qedi_ctx,
2494 board_disable_work.work);
2495
2496 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2497 "Fan failure, Unloading firmware context.\n");
2498
2499 if (test_and_set_bit(QEDI_IN_SHUTDOWN, addr: &qedi->flags))
2500 return;
2501
2502 __qedi_remove(pdev: qedi->pdev, QEDI_MODE_NORMAL);
2503}
2504
2505static void qedi_shutdown(struct pci_dev *pdev)
2506{
2507 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2508
2509 QEDI_ERR(&qedi->dbg_ctx, "%s: Shutdown qedi\n", __func__);
2510 if (test_and_set_bit(QEDI_IN_SHUTDOWN, addr: &qedi->flags))
2511 return;
2512 __qedi_remove(pdev, QEDI_MODE_SHUTDOWN);
2513}
2514
2515static int qedi_suspend(struct pci_dev *pdev, pm_message_t state)
2516{
2517 struct qedi_ctx *qedi;
2518
2519 if (!pdev) {
2520 QEDI_ERR(NULL, "pdev is NULL.\n");
2521 return -ENODEV;
2522 }
2523
2524 qedi = pci_get_drvdata(pdev);
2525
2526 QEDI_ERR(&qedi->dbg_ctx, "%s: Device does not support suspend operation\n", __func__);
2527
2528 return -EPERM;
2529}
2530
2531static int __qedi_probe(struct pci_dev *pdev, int mode)
2532{
2533 struct qedi_ctx *qedi;
2534 struct qed_ll2_params params;
2535 u8 dp_level = 0;
2536 bool is_vf = false;
2537 char host_buf[16];
2538 struct qed_link_params link_params;
2539 struct qed_slowpath_params sp_params;
2540 struct qed_probe_params qed_params;
2541 void *task_start, *task_end;
2542 int rc;
2543 u16 retry = 10;
2544
2545 if (mode != QEDI_MODE_RECOVERY) {
2546 qedi = qedi_host_alloc(pdev);
2547 if (!qedi) {
2548 rc = -ENOMEM;
2549 goto exit_probe;
2550 }
2551 } else {
2552 qedi = pci_get_drvdata(pdev);
2553 }
2554
2555retry_probe:
2556 if (mode == QEDI_MODE_RECOVERY)
2557 msleep(msecs: 2000);
2558
2559 memset(&qed_params, 0, sizeof(qed_params));
2560 qed_params.protocol = QED_PROTOCOL_ISCSI;
2561 qed_params.dp_module = qedi_qed_debug;
2562 qed_params.dp_level = dp_level;
2563 qed_params.is_vf = is_vf;
2564 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2565 if (!qedi->cdev) {
2566 if (mode == QEDI_MODE_RECOVERY && retry) {
2567 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2568 "Retry %d initialize hardware\n", retry);
2569 retry--;
2570 goto retry_probe;
2571 }
2572
2573 rc = -ENODEV;
2574 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2575 goto free_host;
2576 }
2577
2578 set_bit(QEDI_ERR_ATTN_CLR_EN, addr: &qedi->qedi_err_flags);
2579 set_bit(QEDI_ERR_IS_RECOVERABLE, addr: &qedi->qedi_err_flags);
2580 atomic_set(v: &qedi->link_state, QEDI_LINK_DOWN);
2581
2582 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2583 if (rc)
2584 goto free_host;
2585
2586 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2587 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
2588 qedi->dev_info.common.num_hwfns,
2589 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
2590
2591 rc = qedi_set_iscsi_pf_param(qedi);
2592 if (rc) {
2593 rc = -ENOMEM;
2594 QEDI_ERR(&qedi->dbg_ctx,
2595 "Set iSCSI pf param fail\n");
2596 goto free_host;
2597 }
2598
2599 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2600
2601 rc = qedi_prepare_fp(qedi);
2602 if (rc) {
2603 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2604 goto free_pf_params;
2605 }
2606
2607 /* Start the Slowpath-process */
2608 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2609 sp_params.int_mode = QED_INT_MODE_MSIX;
2610 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2611 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2612 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2613 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2614 strscpy(p: sp_params.name, q: "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2615 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2616 if (rc) {
2617 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2618 goto stop_hw;
2619 }
2620
2621 /* update_pf_params needs to be called before and after slowpath
2622 * start
2623 */
2624 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2625
2626 rc = qedi_setup_int(qedi);
2627 if (rc)
2628 goto stop_iscsi_func;
2629
2630 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2631
2632 /* Learn information crucial for qedi to progress */
2633 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2634 if (rc)
2635 goto stop_iscsi_func;
2636
2637 /* Record BDQ producer doorbell addresses */
2638 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2639 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2640 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2641 "BDQ primary_prod=%p secondary_prod=%p.\n",
2642 qedi->bdq_primary_prod,
2643 qedi->bdq_secondary_prod);
2644
2645 /*
2646 * We need to write the number of BDs in the BDQ we've preallocated so
2647 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2648 * packet arrives.
2649 */
2650 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2651 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2652 "Writing %d to primary and secondary BDQ doorbell registers.\n",
2653 qedi->bdq_prod_idx);
2654 writew(val: qedi->bdq_prod_idx, addr: qedi->bdq_primary_prod);
2655 readw(addr: qedi->bdq_primary_prod);
2656 writew(val: qedi->bdq_prod_idx, addr: qedi->bdq_secondary_prod);
2657 readw(addr: qedi->bdq_secondary_prod);
2658
2659 ether_addr_copy(dst: qedi->mac, src: qedi->dev_info.common.hw_mac);
2660 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2661 qedi->mac);
2662
2663 snprintf(buf: host_buf, size: sizeof(host_buf), fmt: "host_%d", qedi->shost->host_no);
2664 qedi_ops->common->set_name(qedi->cdev, host_buf);
2665
2666 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2667
2668 memset(&params, 0, sizeof(params));
2669 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2670 qedi->ll2_mtu = DEF_PATH_MTU;
2671 params.drop_ttl0_packets = 0;
2672 params.rx_vlan_stripping = 1;
2673 ether_addr_copy(dst: params.ll2_mac_address, src: qedi->dev_info.common.hw_mac);
2674
2675 if (mode != QEDI_MODE_RECOVERY) {
2676 /* set up rx path */
2677 INIT_LIST_HEAD(list: &qedi->ll2_skb_list);
2678 spin_lock_init(&qedi->ll2_lock);
2679 /* start qedi context */
2680 spin_lock_init(&qedi->hba_lock);
2681 spin_lock_init(&qedi->task_idx_lock);
2682 mutex_init(&qedi->stats_lock);
2683 }
2684 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2685 qedi_ops->ll2->start(qedi->cdev, &params);
2686
2687 if (mode != QEDI_MODE_RECOVERY) {
2688 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2689 (void *)qedi,
2690 "qedi_ll2_thread");
2691 }
2692
2693 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2694 qedi, qedi_iscsi_event_cb);
2695 if (rc) {
2696 rc = -ENODEV;
2697 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2698 goto stop_slowpath;
2699 }
2700
2701 task_start = qedi_get_task_mem(info: &qedi->tasks, tid: 0);
2702 task_end = qedi_get_task_mem(info: &qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2703 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2704 "Task context start=%p, end=%p block_size=%u.\n",
2705 task_start, task_end, qedi->tasks.size);
2706
2707 memset(&link_params, 0, sizeof(link_params));
2708 link_params.link_up = true;
2709 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2710 if (rc) {
2711 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2712 atomic_set(v: &qedi->link_state, QEDI_LINK_DOWN);
2713 }
2714
2715#ifdef CONFIG_DEBUG_FS
2716 qedi_dbg_host_init(qedi: &qedi->dbg_ctx, dops: qedi_debugfs_ops,
2717 fops: qedi_dbg_fops);
2718#endif
2719 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2720 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2721 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2722 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2723
2724 if (mode == QEDI_MODE_NORMAL) {
2725 if (iscsi_host_add(shost: qedi->shost, pdev: &pdev->dev)) {
2726 QEDI_ERR(&qedi->dbg_ctx,
2727 "Could not add iscsi host\n");
2728 rc = -ENOMEM;
2729 goto remove_host;
2730 }
2731
2732 /* Allocate uio buffers */
2733 rc = qedi_alloc_uio_rings(qedi);
2734 if (rc) {
2735 QEDI_ERR(&qedi->dbg_ctx,
2736 "UIO alloc ring failed err=%d\n", rc);
2737 goto remove_host;
2738 }
2739
2740 rc = qedi_init_uio(qedi);
2741 if (rc) {
2742 QEDI_ERR(&qedi->dbg_ctx,
2743 "UIO init failed, err=%d\n", rc);
2744 goto free_uio;
2745 }
2746
2747 /* host the array on iscsi_conn */
2748 rc = qedi_setup_cid_que(qedi);
2749 if (rc) {
2750 QEDI_ERR(&qedi->dbg_ctx,
2751 "Could not setup cid que\n");
2752 goto free_uio;
2753 }
2754
2755 rc = qedi_cm_alloc_mem(qedi);
2756 if (rc) {
2757 QEDI_ERR(&qedi->dbg_ctx,
2758 "Could not alloc cm memory\n");
2759 goto free_cid_que;
2760 }
2761
2762 rc = qedi_alloc_itt(qedi);
2763 if (rc) {
2764 QEDI_ERR(&qedi->dbg_ctx,
2765 "Could not alloc itt memory\n");
2766 goto free_cid_que;
2767 }
2768
2769 sprintf(buf: host_buf, fmt: "host_%d", qedi->shost->host_no);
2770 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2771 if (!qedi->tmf_thread) {
2772 QEDI_ERR(&qedi->dbg_ctx,
2773 "Unable to start tmf thread!\n");
2774 rc = -ENODEV;
2775 goto free_cid_que;
2776 }
2777
2778 sprintf(buf: host_buf, fmt: "qedi_ofld%d", qedi->shost->host_no);
2779 qedi->offload_thread = create_workqueue(host_buf);
2780 if (!qedi->offload_thread) {
2781 QEDI_ERR(&qedi->dbg_ctx,
2782 "Unable to start offload thread!\n");
2783 rc = -ENODEV;
2784 goto free_tmf_thread;
2785 }
2786
2787 INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler);
2788 INIT_DELAYED_WORK(&qedi->board_disable_work,
2789 qedi_board_disable_work);
2790
2791 /* F/w needs 1st task context memory entry for performance */
2792 set_bit(QEDI_RESERVE_TASK_ID, addr: qedi->task_idx_map);
2793 atomic_set(v: &qedi->num_offloads, i: 0);
2794
2795 if (qedi_setup_boot_info(qedi))
2796 QEDI_ERR(&qedi->dbg_ctx,
2797 "No iSCSI boot target configured\n");
2798
2799 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2800 if (rc)
2801 QEDI_ERR(&qedi->dbg_ctx,
2802 "Failed to send drv state to MFW\n");
2803
2804 }
2805
2806 return 0;
2807
2808free_tmf_thread:
2809 destroy_workqueue(wq: qedi->tmf_thread);
2810free_cid_que:
2811 qedi_release_cid_que(qedi);
2812free_uio:
2813 qedi_free_uio(udev: qedi->udev);
2814remove_host:
2815#ifdef CONFIG_DEBUG_FS
2816 qedi_dbg_host_exit(qedi: &qedi->dbg_ctx);
2817#endif
2818 iscsi_host_remove(shost: qedi->shost, is_shutdown: false);
2819stop_iscsi_func:
2820 qedi_ops->stop(qedi->cdev);
2821stop_slowpath:
2822 qedi_ops->common->slowpath_stop(qedi->cdev);
2823stop_hw:
2824 qedi_ops->common->remove(qedi->cdev);
2825free_pf_params:
2826 qedi_free_iscsi_pf_param(qedi);
2827free_host:
2828 iscsi_host_free(shost: qedi->shost);
2829exit_probe:
2830 return rc;
2831}
2832
2833static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session)
2834{
2835 struct iscsi_session *session = cls_session->dd_data;
2836 struct iscsi_conn *conn = session->leadconn;
2837 struct qedi_conn *qedi_conn = conn->dd_data;
2838
2839 iscsi_conn_failure(conn: qedi_conn->cls_conn->dd_data, err: ISCSI_ERR_CONN_FAILED);
2840}
2841
2842static void qedi_recovery_handler(struct work_struct *work)
2843{
2844 struct qedi_ctx *qedi =
2845 container_of(work, struct qedi_ctx, recovery_work.work);
2846
2847 iscsi_host_for_each_session(shost: qedi->shost, fn: qedi_mark_conn_recovery);
2848
2849 /* Call common_ops->recovery_prolog to allow the MFW to quiesce
2850 * any PCI transactions.
2851 */
2852 qedi_ops->common->recovery_prolog(qedi->cdev);
2853
2854 __qedi_remove(pdev: qedi->pdev, QEDI_MODE_RECOVERY);
2855 __qedi_probe(pdev: qedi->pdev, QEDI_MODE_RECOVERY);
2856 clear_bit(QEDI_IN_RECOVERY, addr: &qedi->flags);
2857}
2858
2859static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2860{
2861 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2862}
2863
2864static void qedi_remove(struct pci_dev *pdev)
2865{
2866 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2867}
2868
2869static struct pci_device_id qedi_pci_tbl[] = {
2870 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2871 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2872 { 0 },
2873};
2874MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2875
2876static enum cpuhp_state qedi_cpuhp_state;
2877
2878static struct pci_error_handlers qedi_err_handler = {
2879 .error_detected = qedi_io_error_detected,
2880};
2881
2882static struct pci_driver qedi_pci_driver = {
2883 .name = QEDI_MODULE_NAME,
2884 .id_table = qedi_pci_tbl,
2885 .probe = qedi_probe,
2886 .remove = qedi_remove,
2887 .shutdown = qedi_shutdown,
2888 .err_handler = &qedi_err_handler,
2889 .suspend = qedi_suspend,
2890};
2891
2892static int __init qedi_init(void)
2893{
2894 struct qedi_percpu_s *p;
2895 int cpu, rc = 0;
2896
2897 qedi_ops = qed_get_iscsi_ops();
2898 if (!qedi_ops) {
2899 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2900 return -EINVAL;
2901 }
2902
2903#ifdef CONFIG_DEBUG_FS
2904 qedi_dbg_init(drv_name: "qedi");
2905#endif
2906
2907 qedi_scsi_transport = iscsi_register_transport(tt: &qedi_iscsi_transport);
2908 if (!qedi_scsi_transport) {
2909 QEDI_ERR(NULL, "Could not register qedi transport");
2910 rc = -ENOMEM;
2911 goto exit_qedi_init_1;
2912 }
2913
2914 for_each_possible_cpu(cpu) {
2915 p = &per_cpu(qedi_percpu, cpu);
2916 INIT_LIST_HEAD(list: &p->work_list);
2917 spin_lock_init(&p->p_work_lock);
2918 p->iothread = NULL;
2919 }
2920
2921 rc = cpuhp_setup_state(state: CPUHP_AP_ONLINE_DYN, name: "scsi/qedi:online",
2922 startup: qedi_cpu_online, teardown: qedi_cpu_offline);
2923 if (rc < 0)
2924 goto exit_qedi_init_2;
2925 qedi_cpuhp_state = rc;
2926
2927 rc = pci_register_driver(&qedi_pci_driver);
2928 if (rc) {
2929 QEDI_ERR(NULL, "Failed to register driver\n");
2930 goto exit_qedi_hp;
2931 }
2932
2933 return 0;
2934
2935exit_qedi_hp:
2936 cpuhp_remove_state(state: qedi_cpuhp_state);
2937exit_qedi_init_2:
2938 iscsi_unregister_transport(tt: &qedi_iscsi_transport);
2939exit_qedi_init_1:
2940#ifdef CONFIG_DEBUG_FS
2941 qedi_dbg_exit();
2942#endif
2943 qed_put_iscsi_ops();
2944 return rc;
2945}
2946
2947static void __exit qedi_cleanup(void)
2948{
2949 pci_unregister_driver(dev: &qedi_pci_driver);
2950 cpuhp_remove_state(state: qedi_cpuhp_state);
2951 iscsi_unregister_transport(tt: &qedi_iscsi_transport);
2952
2953#ifdef CONFIG_DEBUG_FS
2954 qedi_dbg_exit();
2955#endif
2956 qed_put_iscsi_ops();
2957}
2958
2959MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2960MODULE_LICENSE("GPL");
2961MODULE_AUTHOR("QLogic Corporation");
2962MODULE_VERSION(QEDI_MODULE_VERSION);
2963module_init(qedi_init);
2964module_exit(qedi_cleanup);
2965

source code of linux/drivers/scsi/qedi/qedi_main.c