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