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net/mlx5e: Make function mlx5e_change_rep_mtu() static
[linux-2.6/btrfs-unstable.git] / drivers / scsi / qedi / qedi_main.c
blob32ee7f62fef973abdbee2341b170d0c2c65282aa
1 /*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
9
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/kernel.h>
13 #include <linux/if_arp.h>
14 #include <scsi/iscsi_if.h>
15 #include <linux/inet.h>
16 #include <net/arp.h>
17 #include <linux/list.h>
18 #include <linux/kthread.h>
19 #include <linux/mm.h>
20 #include <linux/if_vlan.h>
21 #include <linux/cpu.h>
22 #include <linux/iscsi_boot_sysfs.h>
23
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_eh.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi.h>
29
30 #include "qedi.h"
31 #include "qedi_gbl.h"
32 #include "qedi_iscsi.h"
33
34 static uint qedi_fw_debug;
35 module_param(qedi_fw_debug, uint, 0644);
36 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
37
38 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
39 module_param(qedi_dbg_log, uint, 0644);
40 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
41
42 uint qedi_io_tracing;
43 module_param(qedi_io_tracing, uint, 0644);
44 MODULE_PARM_DESC(qedi_io_tracing,
45 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
46
47 const struct qed_iscsi_ops *qedi_ops;
48 static struct scsi_transport_template *qedi_scsi_transport;
49 static struct pci_driver qedi_pci_driver;
50 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
51 static LIST_HEAD(qedi_udev_list);
52 /* Static function declaration */
53 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
54 static void qedi_free_global_queues(struct qedi_ctx *qedi);
55 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
56 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
57 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
58 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
59
60 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
61 {
62 struct qedi_ctx *qedi;
63 struct qedi_endpoint *qedi_ep;
64 struct iscsi_eqe_data *data;
65 int rval = 0;
66
67 if (!context || !fw_handle) {
68 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
69 return -EINVAL;
70 }
71
72 qedi = (struct qedi_ctx *)context;
73 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
74 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
75
76 data = (struct iscsi_eqe_data *)fw_handle;
77 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
78 "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
79 data->icid, data->conn_id, data->error_code,
80 data->error_pdu_opcode_reserved);
81
82 qedi_ep = qedi->ep_tbl[data->icid];
83
84 if (!qedi_ep) {
85 QEDI_WARN(&qedi->dbg_ctx,
86 "Cannot process event, ep already disconnected, cid=0x%x\n",
87 data->icid);
88 WARN_ON(1);
89 return -ENODEV;
90 }
91
92 switch (fw_event_code) {
93 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
94 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
95 qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
96
97 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
98 break;
99 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
100 qedi_ep->state = EP_STATE_DISCONN_COMPL;
101 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
102 break;
103 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
104 qedi_process_iscsi_error(qedi_ep, data);
105 break;
106 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
107 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
108 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
109 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
110 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
111 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
112 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
113 qedi_process_tcp_error(qedi_ep, data);
114 break;
115 default:
116 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
117 fw_event_code);
118 }
119
120 return rval;
121 }
122
123 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
124 {
125 struct qedi_uio_dev *udev = uinfo->priv;
126 struct qedi_ctx *qedi = udev->qedi;
127
128 if (!capable(CAP_NET_ADMIN))
129 return -EPERM;
130
131 if (udev->uio_dev != -1)
132 return -EBUSY;
133
134 rtnl_lock();
135 udev->uio_dev = iminor(inode);
136 qedi_reset_uio_rings(udev);
137 set_bit(UIO_DEV_OPENED, &qedi->flags);
138 rtnl_unlock();
139
140 return 0;
141 }
142
143 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
144 {
145 struct qedi_uio_dev *udev = uinfo->priv;
146 struct qedi_ctx *qedi = udev->qedi;
147
148 udev->uio_dev = -1;
149 clear_bit(UIO_DEV_OPENED, &qedi->flags);
150 qedi_ll2_free_skbs(qedi);
151 return 0;
152 }
153
154 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
155 {
156 if (udev->uctrl) {
157 free_page((unsigned long)udev->uctrl);
158 udev->uctrl = NULL;
159 }
160
161 if (udev->ll2_ring) {
162 free_page((unsigned long)udev->ll2_ring);
163 udev->ll2_ring = NULL;
164 }
165
166 if (udev->ll2_buf) {
167 free_pages((unsigned long)udev->ll2_buf, 2);
168 udev->ll2_buf = NULL;
169 }
170 }
171
172 static void __qedi_free_uio(struct qedi_uio_dev *udev)
173 {
174 uio_unregister_device(&udev->qedi_uinfo);
175
176 __qedi_free_uio_rings(udev);
177
178 pci_dev_put(udev->pdev);
179 kfree(udev);
180 }
181
182 static void qedi_free_uio(struct qedi_uio_dev *udev)
183 {
184 if (!udev)
185 return;
186
187 list_del_init(&udev->list);
188 __qedi_free_uio(udev);
189 }
190
191 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
192 {
193 struct qedi_ctx *qedi = NULL;
194 struct qedi_uio_ctrl *uctrl = NULL;
195
196 qedi = udev->qedi;
197 uctrl = udev->uctrl;
198
199 spin_lock_bh(&qedi->ll2_lock);
200 uctrl->host_rx_cons = 0;
201 uctrl->hw_rx_prod = 0;
202 uctrl->hw_rx_bd_prod = 0;
203 uctrl->host_rx_bd_cons = 0;
204
205 memset(udev->ll2_ring, 0, udev->ll2_ring_size);
206 memset(udev->ll2_buf, 0, udev->ll2_buf_size);
207 spin_unlock_bh(&qedi->ll2_lock);
208 }
209
210 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
211 {
212 int rc = 0;
213
214 if (udev->ll2_ring || udev->ll2_buf)
215 return rc;
216
217 /* Memory for control area. */
218 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
219 if (!udev->uctrl)
220 return -ENOMEM;
221
222 /* Allocating memory for LL2 ring */
223 udev->ll2_ring_size = QEDI_PAGE_SIZE;
224 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
225 if (!udev->ll2_ring) {
226 rc = -ENOMEM;
227 goto exit_alloc_ring;
228 }
229
230 /* Allocating memory for Tx/Rx pkt buffer */
231 udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
232 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
233 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
234 __GFP_ZERO, 2);
235 if (!udev->ll2_buf) {
236 rc = -ENOMEM;
237 goto exit_alloc_buf;
238 }
239 return rc;
240
241 exit_alloc_buf:
242 free_page((unsigned long)udev->ll2_ring);
243 udev->ll2_ring = NULL;
244 exit_alloc_ring:
245 return rc;
246 }
247
248 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
249 {
250 struct qedi_uio_dev *udev = NULL;
251 int rc = 0;
252
253 list_for_each_entry(udev, &qedi_udev_list, list) {
254 if (udev->pdev == qedi->pdev) {
255 udev->qedi = qedi;
256 if (__qedi_alloc_uio_rings(udev)) {
257 udev->qedi = NULL;
258 return -ENOMEM;
259 }
260 qedi->udev = udev;
261 return 0;
262 }
263 }
264
265 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
266 if (!udev) {
267 rc = -ENOMEM;
268 goto err_udev;
269 }
270
271 udev->uio_dev = -1;
272
273 udev->qedi = qedi;
274 udev->pdev = qedi->pdev;
275
276 rc = __qedi_alloc_uio_rings(udev);
277 if (rc)
278 goto err_uctrl;
279
280 list_add(&udev->list, &qedi_udev_list);
281
282 pci_dev_get(udev->pdev);
283 qedi->udev = udev;
284
285 udev->tx_pkt = udev->ll2_buf;
286 udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
287 return 0;
288
289 err_uctrl:
290 kfree(udev);
291 err_udev:
292 return -ENOMEM;
293 }
294
295 static int qedi_init_uio(struct qedi_ctx *qedi)
296 {
297 struct qedi_uio_dev *udev = qedi->udev;
298 struct uio_info *uinfo;
299 int ret = 0;
300
301 if (!udev)
302 return -ENOMEM;
303
304 uinfo = &udev->qedi_uinfo;
305
306 uinfo->mem[0].addr = (unsigned long)udev->uctrl;
307 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
308 uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
309
310 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
311 uinfo->mem[1].size = udev->ll2_ring_size;
312 uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
313
314 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
315 uinfo->mem[2].size = udev->ll2_buf_size;
316 uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
317
318 uinfo->name = "qedi_uio";
319 uinfo->version = QEDI_MODULE_VERSION;
320 uinfo->irq = UIO_IRQ_CUSTOM;
321
322 uinfo->open = qedi_uio_open;
323 uinfo->release = qedi_uio_close;
324
325 if (udev->uio_dev == -1) {
326 if (!uinfo->priv) {
327 uinfo->priv = udev;
328
329 ret = uio_register_device(&udev->pdev->dev, uinfo);
330 if (ret) {
331 QEDI_ERR(&qedi->dbg_ctx,
332 "UIO registration failed\n");
333 }
334 }
335 }
336
337 return ret;
338 }
339
340 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
341 struct qed_sb_info *sb_info, u16 sb_id)
342 {
343 struct status_block_e4 *sb_virt;
344 dma_addr_t sb_phys;
345 int ret;
346
347 sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
348 sizeof(struct status_block_e4), &sb_phys,
349 GFP_KERNEL);
350 if (!sb_virt) {
351 QEDI_ERR(&qedi->dbg_ctx,
352 "Status block allocation failed for id = %d.\n",
353 sb_id);
354 return -ENOMEM;
355 }
356
357 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
358 sb_id, QED_SB_TYPE_STORAGE);
359 if (ret) {
360 QEDI_ERR(&qedi->dbg_ctx,
361 "Status block initialization failed for id = %d.\n",
362 sb_id);
363 return ret;
364 }
365
366 return 0;
367 }
368
369 static void qedi_free_sb(struct qedi_ctx *qedi)
370 {
371 struct qed_sb_info *sb_info;
372 int id;
373
374 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
375 sb_info = &qedi->sb_array[id];
376 if (sb_info->sb_virt)
377 dma_free_coherent(&qedi->pdev->dev,
378 sizeof(*sb_info->sb_virt),
379 (void *)sb_info->sb_virt,
380 sb_info->sb_phys);
381 }
382 }
383
384 static void qedi_free_fp(struct qedi_ctx *qedi)
385 {
386 kfree(qedi->fp_array);
387 kfree(qedi->sb_array);
388 }
389
390 static void qedi_destroy_fp(struct qedi_ctx *qedi)
391 {
392 qedi_free_sb(qedi);
393 qedi_free_fp(qedi);
394 }
395
396 static int qedi_alloc_fp(struct qedi_ctx *qedi)
397 {
398 int ret = 0;
399
400 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
401 sizeof(struct qedi_fastpath), GFP_KERNEL);
402 if (!qedi->fp_array) {
403 QEDI_ERR(&qedi->dbg_ctx,
404 "fastpath fp array allocation failed.\n");
405 return -ENOMEM;
406 }
407
408 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
409 sizeof(struct qed_sb_info), GFP_KERNEL);
410 if (!qedi->sb_array) {
411 QEDI_ERR(&qedi->dbg_ctx,
412 "fastpath sb array allocation failed.\n");
413 ret = -ENOMEM;
414 goto free_fp;
415 }
416
417 return ret;
418
419 free_fp:
420 qedi_free_fp(qedi);
421 return ret;
422 }
423
424 static void qedi_int_fp(struct qedi_ctx *qedi)
425 {
426 struct qedi_fastpath *fp;
427 int id;
428
429 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
430 sizeof(*qedi->fp_array));
431 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
432 sizeof(*qedi->sb_array));
433
434 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
435 fp = &qedi->fp_array[id];
436 fp->sb_info = &qedi->sb_array[id];
437 fp->sb_id = id;
438 fp->qedi = qedi;
439 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
440 "qedi", id);
441
442 /* fp_array[i] ---- irq cookie
443 * So init data which is needed in int ctx
444 */
445 }
446 }
447
448 static int qedi_prepare_fp(struct qedi_ctx *qedi)
449 {
450 struct qedi_fastpath *fp;
451 int id, ret = 0;
452
453 ret = qedi_alloc_fp(qedi);
454 if (ret)
455 goto err;
456
457 qedi_int_fp(qedi);
458
459 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
460 fp = &qedi->fp_array[id];
461 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
462 if (ret) {
463 QEDI_ERR(&qedi->dbg_ctx,
464 "SB allocation and initialization failed.\n");
465 ret = -EIO;
466 goto err_init;
467 }
468 }
469
470 return 0;
471
472 err_init:
473 qedi_free_sb(qedi);
474 qedi_free_fp(qedi);
475 err:
476 return ret;
477 }
478
479 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
480 {
481 int i;
482
483 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
484 sizeof(u32), GFP_KERNEL);
485 if (!qedi->cid_que.cid_que_base)
486 return -ENOMEM;
487
488 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
489 sizeof(struct qedi_conn *),
490 GFP_KERNEL);
491 if (!qedi->cid_que.conn_cid_tbl) {
492 kfree(qedi->cid_que.cid_que_base);
493 qedi->cid_que.cid_que_base = NULL;
494 return -ENOMEM;
495 }
496
497 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
498 qedi->cid_que.cid_q_prod_idx = 0;
499 qedi->cid_que.cid_q_cons_idx = 0;
500 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
501 qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
502
503 for (i = 0; i < qedi->max_active_conns; i++) {
504 qedi->cid_que.cid_que[i] = i;
505 qedi->cid_que.conn_cid_tbl[i] = NULL;
506 }
507
508 return 0;
509 }
510
511 static void qedi_release_cid_que(struct qedi_ctx *qedi)
512 {
513 kfree(qedi->cid_que.cid_que_base);
514 qedi->cid_que.cid_que_base = NULL;
515
516 kfree(qedi->cid_que.conn_cid_tbl);
517 qedi->cid_que.conn_cid_tbl = NULL;
518 }
519
520 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
521 u16 start_id, u16 next)
522 {
523 id_tbl->start = start_id;
524 id_tbl->max = size;
525 id_tbl->next = next;
526 spin_lock_init(&id_tbl->lock);
527 id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
528 if (!id_tbl->table)
529 return -ENOMEM;
530
531 return 0;
532 }
533
534 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
535 {
536 kfree(id_tbl->table);
537 id_tbl->table = NULL;
538 }
539
540 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
541 {
542 int ret = -1;
543
544 id -= id_tbl->start;
545 if (id >= id_tbl->max)
546 return ret;
547
548 spin_lock(&id_tbl->lock);
549 if (!test_bit(id, id_tbl->table)) {
550 set_bit(id, id_tbl->table);
551 ret = 0;
552 }
553 spin_unlock(&id_tbl->lock);
554 return ret;
555 }
556
557 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
558 {
559 u16 id;
560
561 spin_lock(&id_tbl->lock);
562 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
563 if (id >= id_tbl->max) {
564 id = QEDI_LOCAL_PORT_INVALID;
565 if (id_tbl->next != 0) {
566 id = find_first_zero_bit(id_tbl->table, id_tbl->next);
567 if (id >= id_tbl->next)
568 id = QEDI_LOCAL_PORT_INVALID;
569 }
570 }
571
572 if (id < id_tbl->max) {
573 set_bit(id, id_tbl->table);
574 id_tbl->next = (id + 1) & (id_tbl->max - 1);
575 id += id_tbl->start;
576 }
577
578 spin_unlock(&id_tbl->lock);
579
580 return id;
581 }
582
583 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
584 {
585 if (id == QEDI_LOCAL_PORT_INVALID)
586 return;
587
588 id -= id_tbl->start;
589 if (id >= id_tbl->max)
590 return;
591
592 clear_bit(id, id_tbl->table);
593 }
594
595 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
596 {
597 kfree(qedi->ep_tbl);
598 qedi->ep_tbl = NULL;
599 qedi_free_id_tbl(&qedi->lcl_port_tbl);
600 }
601
602 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
603 {
604 u16 port_id;
605
606 qedi->ep_tbl = kzalloc((qedi->max_active_conns *
607 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
608 if (!qedi->ep_tbl)
609 return -ENOMEM;
610 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
611 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
612 QEDI_LOCAL_PORT_MIN, port_id)) {
613 qedi_cm_free_mem(qedi);
614 return -ENOMEM;
615 }
616
617 return 0;
618 }
619
620 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
621 {
622 struct Scsi_Host *shost;
623 struct qedi_ctx *qedi = NULL;
624
625 shost = iscsi_host_alloc(&qedi_host_template,
626 sizeof(struct qedi_ctx), 0);
627 if (!shost) {
628 QEDI_ERR(NULL, "Could not allocate shost\n");
629 goto exit_setup_shost;
630 }
631
632 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
633 shost->max_channel = 0;
634 shost->max_lun = ~0;
635 shost->max_cmd_len = 16;
636 shost->transportt = qedi_scsi_transport;
637
638 qedi = iscsi_host_priv(shost);
639 memset(qedi, 0, sizeof(*qedi));
640 qedi->shost = shost;
641 qedi->dbg_ctx.host_no = shost->host_no;
642 qedi->pdev = pdev;
643 qedi->dbg_ctx.pdev = pdev;
644 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
645 qedi->max_sqes = QEDI_SQ_SIZE;
646
647 if (shost_use_blk_mq(shost))
648 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
649
650 pci_set_drvdata(pdev, qedi);
651
652 exit_setup_shost:
653 return qedi;
654 }
655
656 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
657 {
658 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
659 struct qedi_uio_dev *udev;
660 struct qedi_uio_ctrl *uctrl;
661 struct skb_work_list *work;
662 u32 prod;
663
664 if (!qedi) {
665 QEDI_ERR(NULL, "qedi is NULL\n");
666 return -1;
667 }
668
669 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
670 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
671 "UIO DEV is not opened\n");
672 kfree_skb(skb);
673 return 0;
674 }
675
676 udev = qedi->udev;
677 uctrl = udev->uctrl;
678
679 work = kzalloc(sizeof(*work), GFP_ATOMIC);
680 if (!work) {
681 QEDI_WARN(&qedi->dbg_ctx,
682 "Could not allocate work so dropping frame.\n");
683 kfree_skb(skb);
684 return 0;
685 }
686
687 INIT_LIST_HEAD(&work->list);
688 work->skb = skb;
689
690 if (skb_vlan_tag_present(skb))
691 work->vlan_id = skb_vlan_tag_get(skb);
692
693 if (work->vlan_id)
694 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
695
696 spin_lock_bh(&qedi->ll2_lock);
697 list_add_tail(&work->list, &qedi->ll2_skb_list);
698
699 ++uctrl->hw_rx_prod_cnt;
700 prod = (uctrl->hw_rx_prod + 1) % RX_RING;
701 if (prod != uctrl->host_rx_cons) {
702 uctrl->hw_rx_prod = prod;
703 spin_unlock_bh(&qedi->ll2_lock);
704 wake_up_process(qedi->ll2_recv_thread);
705 return 0;
706 }
707
708 spin_unlock_bh(&qedi->ll2_lock);
709 return 0;
710 }
711
712 /* map this skb to iscsiuio mmaped region */
713 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
714 u16 vlan_id)
715 {
716 struct qedi_uio_dev *udev = NULL;
717 struct qedi_uio_ctrl *uctrl = NULL;
718 struct qedi_rx_bd rxbd;
719 struct qedi_rx_bd *p_rxbd;
720 u32 rx_bd_prod;
721 void *pkt;
722 int len = 0;
723
724 if (!qedi) {
725 QEDI_ERR(NULL, "qedi is NULL\n");
726 return -1;
727 }
728
729 udev = qedi->udev;
730 uctrl = udev->uctrl;
731 pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
732 len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
733 memcpy(pkt, skb->data, len);
734
735 memset(&rxbd, 0, sizeof(rxbd));
736 rxbd.rx_pkt_index = uctrl->hw_rx_prod;
737 rxbd.rx_pkt_len = len;
738 rxbd.vlan_id = vlan_id;
739
740 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
741 rx_bd_prod = uctrl->hw_rx_bd_prod;
742 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
743 p_rxbd += rx_bd_prod;
744
745 memcpy(p_rxbd, &rxbd, sizeof(rxbd));
746
747 /* notify the iscsiuio about new packet */
748 uio_event_notify(&udev->qedi_uinfo);
749
750 return 0;
751 }
752
753 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
754 {
755 struct skb_work_list *work, *work_tmp;
756
757 spin_lock_bh(&qedi->ll2_lock);
758 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
759 list_del(&work->list);
760 if (work->skb)
761 kfree_skb(work->skb);
762 kfree(work);
763 }
764 spin_unlock_bh(&qedi->ll2_lock);
765 }
766
767 static int qedi_ll2_recv_thread(void *arg)
768 {
769 struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
770 struct skb_work_list *work, *work_tmp;
771
772 set_user_nice(current, -20);
773
774 while (!kthread_should_stop()) {
775 spin_lock_bh(&qedi->ll2_lock);
776 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
777 list) {
778 list_del(&work->list);
779 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
780 kfree_skb(work->skb);
781 kfree(work);
782 }
783 set_current_state(TASK_INTERRUPTIBLE);
784 spin_unlock_bh(&qedi->ll2_lock);
785 schedule();
786 }
787
788 __set_current_state(TASK_RUNNING);
789 return 0;
790 }
791
792 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
793 {
794 u8 num_sq_pages;
795 u32 log_page_size;
796 int rval = 0;
797
798
799 num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
800
801 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
802
803 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
804 "Number of CQ count is %d\n", qedi->num_queues);
805
806 memset(&qedi->pf_params.iscsi_pf_params, 0,
807 sizeof(qedi->pf_params.iscsi_pf_params));
808
809 qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
810 qedi->num_queues * sizeof(struct qedi_glbl_q_params),
811 &qedi->hw_p_cpuq);
812 if (!qedi->p_cpuq) {
813 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
814 rval = -1;
815 goto err_alloc_mem;
816 }
817
818 rval = qedi_alloc_global_queues(qedi);
819 if (rval) {
820 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
821 rval = -1;
822 goto err_alloc_mem;
823 }
824
825 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
826 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
827 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
828 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
829 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
830 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
831 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
832 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
833 qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
834 qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
835
836 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
837 if ((1 << log_page_size) == PAGE_SIZE)
838 break;
839 }
840 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
841
842 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
843 (u64)qedi->hw_p_cpuq;
844
845 /* RQ BDQ initializations.
846 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
847 * rqe_log_size: 8 for 256B RQE
848 */
849 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
850 /* BDQ address and size */
851 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
852 qedi->bdq_pbl_list_dma;
853 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
854 qedi->bdq_pbl_list_num_entries;
855 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
856
857 /* cq_num_entries: num_tasks + rq_num_entries */
858 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
859
860 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
861 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
862
863 err_alloc_mem:
864 return rval;
865 }
866
867 /* Free DMA coherent memory for array of queue pointers we pass to qed */
868 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
869 {
870 size_t size = 0;
871
872 if (qedi->p_cpuq) {
873 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
874 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
875 qedi->hw_p_cpuq);
876 }
877
878 qedi_free_global_queues(qedi);
879
880 kfree(qedi->global_queues);
881 }
882
883 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
884 struct qedi_boot_target *tgt, u8 index)
885 {
886 u32 ipv6_en;
887
888 ipv6_en = !!(block->generic.ctrl_flags &
889 NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
890
891 snprintf(tgt->iscsi_name, NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, "%s\n",
892 block->target[index].target_name.byte);
893
894 tgt->ipv6_en = ipv6_en;
895
896 if (ipv6_en)
897 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
898 block->target[index].ipv6_addr.byte);
899 else
900 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
901 block->target[index].ipv4_addr.byte);
902 }
903
904 static int qedi_find_boot_info(struct qedi_ctx *qedi,
905 struct qed_mfw_tlv_iscsi *iscsi,
906 struct nvm_iscsi_block *block)
907 {
908 struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
909 u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
910 struct iscsi_cls_session *cls_sess;
911 struct iscsi_cls_conn *cls_conn;
912 struct qedi_conn *qedi_conn;
913 struct iscsi_session *sess;
914 struct iscsi_conn *conn;
915 char ep_ip_addr[64];
916 int i, ret = 0;
917
918 pri_ctrl_flags = !!(block->target[0].ctrl_flags &
919 NVM_ISCSI_CFG_TARGET_ENABLED);
920 if (pri_ctrl_flags) {
921 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
922 if (!pri_tgt)
923 return -1;
924 qedi_get_boot_tgt_info(block, pri_tgt, 0);
925 }
926
927 sec_ctrl_flags = !!(block->target[1].ctrl_flags &
928 NVM_ISCSI_CFG_TARGET_ENABLED);
929 if (sec_ctrl_flags) {
930 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
931 if (!sec_tgt) {
932 ret = -1;
933 goto free_tgt;
934 }
935 qedi_get_boot_tgt_info(block, sec_tgt, 1);
936 }
937
938 for (i = 0; i < qedi->max_active_conns; i++) {
939 qedi_conn = qedi_get_conn_from_id(qedi, i);
940 if (!qedi_conn)
941 continue;
942
943 if (qedi_conn->ep->ip_type == TCP_IPV4)
944 snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
945 qedi_conn->ep->dst_addr);
946 else
947 snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
948 qedi_conn->ep->dst_addr);
949
950 cls_conn = qedi_conn->cls_conn;
951 conn = cls_conn->dd_data;
952 cls_sess = iscsi_conn_to_session(cls_conn);
953 sess = cls_sess->dd_data;
954
955 if (pri_ctrl_flags) {
956 if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
957 !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
958 found = 1;
959 break;
960 }
961 }
962
963 if (sec_ctrl_flags) {
964 if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
965 !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
966 found = 1;
967 break;
968 }
969 }
970 }
971
972 if (found) {
973 if (conn->hdrdgst_en) {
974 iscsi->header_digest_set = true;
975 iscsi->header_digest = 1;
976 }
977
978 if (conn->datadgst_en) {
979 iscsi->data_digest_set = true;
980 iscsi->data_digest = 1;
981 }
982 iscsi->boot_taget_portal_set = true;
983 iscsi->boot_taget_portal = sess->tpgt;
984
985 } else {
986 ret = -1;
987 }
988
989 if (sec_ctrl_flags)
990 kfree(sec_tgt);
991 free_tgt:
992 if (pri_ctrl_flags)
993 kfree(pri_tgt);
994
995 return ret;
996 }
997
998 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
999 {
1000 struct qedi_ctx *qedi;
1001
1002 if (!dev) {
1003 QEDI_INFO(NULL, QEDI_LOG_EVT,
1004 "dev is NULL so ignoring get_generic_tlv_data request.\n");
1005 return;
1006 }
1007 qedi = (struct qedi_ctx *)dev;
1008
1009 memset(data, 0, sizeof(struct qed_generic_tlvs));
1010 ether_addr_copy(data->mac[0], qedi->mac);
1011 }
1012
1013 /*
1014 * Protocol TLV handler
1015 */
1016 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1017 {
1018 struct qed_mfw_tlv_iscsi *iscsi = data;
1019 struct qed_iscsi_stats *fw_iscsi_stats;
1020 struct nvm_iscsi_block *block = NULL;
1021 u32 chap_en = 0, mchap_en = 0;
1022 struct qedi_ctx *qedi = dev;
1023 int rval = 0;
1024
1025 fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1026 if (!fw_iscsi_stats) {
1027 QEDI_ERR(&qedi->dbg_ctx,
1028 "Could not allocate memory for fw_iscsi_stats.\n");
1029 goto exit_get_data;
1030 }
1031
1032 mutex_lock(&qedi->stats_lock);
1033 /* Query firmware for offload stats */
1034 qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1035 mutex_unlock(&qedi->stats_lock);
1036
1037 iscsi->rx_frames_set = true;
1038 iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1039 iscsi->rx_bytes_set = true;
1040 iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1041 iscsi->tx_frames_set = true;
1042 iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1043 iscsi->tx_bytes_set = true;
1044 iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1045 iscsi->frame_size_set = true;
1046 iscsi->frame_size = qedi->ll2_mtu;
1047 block = qedi_get_nvram_block(qedi);
1048 if (block) {
1049 chap_en = !!(block->generic.ctrl_flags &
1050 NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1051 mchap_en = !!(block->generic.ctrl_flags &
1052 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1053
1054 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1055 iscsi->auth_method = 1;
1056 if (chap_en)
1057 iscsi->auth_method = 2;
1058 if (mchap_en)
1059 iscsi->auth_method = 3;
1060
1061 iscsi->tx_desc_size_set = true;
1062 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1063 iscsi->rx_desc_size_set = true;
1064 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1065
1066 /* tpgt, hdr digest, data digest */
1067 rval = qedi_find_boot_info(qedi, iscsi, block);
1068 if (rval)
1069 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1070 "Boot target not set");
1071 }
1072
1073 kfree(fw_iscsi_stats);
1074 exit_get_data:
1075 return;
1076 }
1077
1078 static void qedi_link_update(void *dev, struct qed_link_output *link)
1079 {
1080 struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1081
1082 if (link->link_up) {
1083 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1084 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1085 } else {
1086 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1087 "Link Down event.\n");
1088 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1089 }
1090 }
1091
1092 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1093 {
1094 .link_update = qedi_link_update,
1095 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1096 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1097 }
1098 };
1099
1100 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1101 u16 que_idx, struct qedi_percpu_s *p)
1102 {
1103 struct qedi_work *qedi_work;
1104 struct qedi_conn *q_conn;
1105 struct iscsi_conn *conn;
1106 struct qedi_cmd *qedi_cmd;
1107 u32 iscsi_cid;
1108 int rc = 0;
1109
1110 iscsi_cid = cqe->cqe_common.conn_id;
1111 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1112 if (!q_conn) {
1113 QEDI_WARN(&qedi->dbg_ctx,
1114 "Session no longer exists for cid=0x%x!!\n",
1115 iscsi_cid);
1116 return -1;
1117 }
1118 conn = q_conn->cls_conn->dd_data;
1119
1120 switch (cqe->cqe_common.cqe_type) {
1121 case ISCSI_CQE_TYPE_SOLICITED:
1122 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1123 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1124 if (!qedi_cmd) {
1125 rc = -1;
1126 break;
1127 }
1128 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1129 qedi_cmd->cqe_work.qedi = qedi;
1130 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1131 qedi_cmd->cqe_work.que_idx = que_idx;
1132 qedi_cmd->cqe_work.is_solicited = true;
1133 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1134 break;
1135 case ISCSI_CQE_TYPE_UNSOLICITED:
1136 case ISCSI_CQE_TYPE_DUMMY:
1137 case ISCSI_CQE_TYPE_TASK_CLEANUP:
1138 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1139 if (!qedi_work) {
1140 rc = -1;
1141 break;
1142 }
1143 INIT_LIST_HEAD(&qedi_work->list);
1144 qedi_work->qedi = qedi;
1145 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1146 qedi_work->que_idx = que_idx;
1147 qedi_work->is_solicited = false;
1148 list_add_tail(&qedi_work->list, &p->work_list);
1149 break;
1150 default:
1151 rc = -1;
1152 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1153 }
1154 return rc;
1155 }
1156
1157 static bool qedi_process_completions(struct qedi_fastpath *fp)
1158 {
1159 struct qedi_ctx *qedi = fp->qedi;
1160 struct qed_sb_info *sb_info = fp->sb_info;
1161 struct status_block_e4 *sb = sb_info->sb_virt;
1162 struct qedi_percpu_s *p = NULL;
1163 struct global_queue *que;
1164 u16 prod_idx;
1165 unsigned long flags;
1166 union iscsi_cqe *cqe;
1167 int cpu;
1168 int ret;
1169
1170 /* Get the current firmware producer index */
1171 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1172
1173 if (prod_idx >= QEDI_CQ_SIZE)
1174 prod_idx = prod_idx % QEDI_CQ_SIZE;
1175
1176 que = qedi->global_queues[fp->sb_id];
1177 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1178 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1179 que, prod_idx, que->cq_cons_idx, fp->sb_id);
1180
1181 qedi->intr_cpu = fp->sb_id;
1182 cpu = smp_processor_id();
1183 p = &per_cpu(qedi_percpu, cpu);
1184
1185 if (unlikely(!p->iothread))
1186 WARN_ON(1);
1187
1188 spin_lock_irqsave(&p->p_work_lock, flags);
1189 while (que->cq_cons_idx != prod_idx) {
1190 cqe = &que->cq[que->cq_cons_idx];
1191
1192 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1193 "cqe=%p prod_idx=%d cons_idx=%d.\n",
1194 cqe, prod_idx, que->cq_cons_idx);
1195
1196 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1197 if (ret)
1198 QEDI_WARN(&qedi->dbg_ctx,
1199 "Dropping CQE 0x%x for cid=0x%x.\n",
1200 que->cq_cons_idx, cqe->cqe_common.conn_id);
1201
1202 que->cq_cons_idx++;
1203 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1204 que->cq_cons_idx = 0;
1205 }
1206 wake_up_process(p->iothread);
1207 spin_unlock_irqrestore(&p->p_work_lock, flags);
1208
1209 return true;
1210 }
1211
1212 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1213 {
1214 struct qedi_ctx *qedi = fp->qedi;
1215 struct global_queue *que;
1216 struct qed_sb_info *sb_info = fp->sb_info;
1217 struct status_block_e4 *sb = sb_info->sb_virt;
1218 u16 prod_idx;
1219
1220 barrier();
1221
1222 /* Get the current firmware producer index */
1223 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1224
1225 /* Get the pointer to the global CQ this completion is on */
1226 que = qedi->global_queues[fp->sb_id];
1227
1228 /* prod idx wrap around uint16 */
1229 if (prod_idx >= QEDI_CQ_SIZE)
1230 prod_idx = prod_idx % QEDI_CQ_SIZE;
1231
1232 return (que->cq_cons_idx != prod_idx);
1233 }
1234
1235 /* MSI-X fastpath handler code */
1236 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1237 {
1238 struct qedi_fastpath *fp = dev_id;
1239 struct qedi_ctx *qedi = fp->qedi;
1240 bool wake_io_thread = true;
1241
1242 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1243
1244 process_again:
1245 wake_io_thread = qedi_process_completions(fp);
1246 if (wake_io_thread) {
1247 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1248 "process already running\n");
1249 }
1250
1251 if (qedi_fp_has_work(fp) == 0)
1252 qed_sb_update_sb_idx(fp->sb_info);
1253
1254 /* Check for more work */
1255 rmb();
1256
1257 if (qedi_fp_has_work(fp) == 0)
1258 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1259 else
1260 goto process_again;
1261
1262 return IRQ_HANDLED;
1263 }
1264
1265 /* simd handler for MSI/INTa */
1266 static void qedi_simd_int_handler(void *cookie)
1267 {
1268 /* Cookie is qedi_ctx struct */
1269 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1270
1271 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1272 }
1273
1274 #define QEDI_SIMD_HANDLER_NUM 0
1275 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1276 {
1277 int i;
1278
1279 if (qedi->int_info.msix_cnt) {
1280 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1281 synchronize_irq(qedi->int_info.msix[i].vector);
1282 irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1283 NULL);
1284 free_irq(qedi->int_info.msix[i].vector,
1285 &qedi->fp_array[i]);
1286 }
1287 } else {
1288 qedi_ops->common->simd_handler_clean(qedi->cdev,
1289 QEDI_SIMD_HANDLER_NUM);
1290 }
1291
1292 qedi->int_info.used_cnt = 0;
1293 qedi_ops->common->set_fp_int(qedi->cdev, 0);
1294 }
1295
1296 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1297 {
1298 int i, rc, cpu;
1299
1300 cpu = cpumask_first(cpu_online_mask);
1301 for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1302 rc = request_irq(qedi->int_info.msix[i].vector,
1303 qedi_msix_handler, 0, "qedi",
1304 &qedi->fp_array[i]);
1305
1306 if (rc) {
1307 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1308 qedi_sync_free_irqs(qedi);
1309 return rc;
1310 }
1311 qedi->int_info.used_cnt++;
1312 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1313 get_cpu_mask(cpu));
1314 cpu = cpumask_next(cpu, cpu_online_mask);
1315 }
1316
1317 return 0;
1318 }
1319
1320 static int qedi_setup_int(struct qedi_ctx *qedi)
1321 {
1322 int rc = 0;
1323
1324 rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1325 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1326 if (rc)
1327 goto exit_setup_int;
1328
1329 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1330 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1331 qedi->int_info.msix_cnt, num_online_cpus());
1332
1333 if (qedi->int_info.msix_cnt) {
1334 rc = qedi_request_msix_irq(qedi);
1335 goto exit_setup_int;
1336 } else {
1337 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1338 QEDI_SIMD_HANDLER_NUM,
1339 qedi_simd_int_handler);
1340 qedi->int_info.used_cnt = 1;
1341 }
1342
1343 exit_setup_int:
1344 return rc;
1345 }
1346
1347 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1348 {
1349 if (qedi->iscsi_cfg)
1350 dma_free_coherent(&qedi->pdev->dev,
1351 sizeof(struct nvm_iscsi_cfg),
1352 qedi->iscsi_cfg, qedi->nvm_buf_dma);
1353 }
1354
1355 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1356 {
1357 qedi->iscsi_cfg = dma_zalloc_coherent(&qedi->pdev->dev,
1358 sizeof(struct nvm_iscsi_cfg),
1359 &qedi->nvm_buf_dma, GFP_KERNEL);
1360 if (!qedi->iscsi_cfg) {
1361 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1362 return -ENOMEM;
1363 }
1364 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1365 "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_cfg,
1366 qedi->nvm_buf_dma);
1367
1368 return 0;
1369 }
1370
1371 static void qedi_free_bdq(struct qedi_ctx *qedi)
1372 {
1373 int i;
1374
1375 if (qedi->bdq_pbl_list)
1376 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1377 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1378
1379 if (qedi->bdq_pbl)
1380 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1381 qedi->bdq_pbl, qedi->bdq_pbl_dma);
1382
1383 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1384 if (qedi->bdq[i].buf_addr) {
1385 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1386 qedi->bdq[i].buf_addr,
1387 qedi->bdq[i].buf_dma);
1388 }
1389 }
1390 }
1391
1392 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1393 {
1394 int i;
1395 struct global_queue **gl = qedi->global_queues;
1396
1397 for (i = 0; i < qedi->num_queues; i++) {
1398 if (!gl[i])
1399 continue;
1400
1401 if (gl[i]->cq)
1402 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1403 gl[i]->cq, gl[i]->cq_dma);
1404 if (gl[i]->cq_pbl)
1405 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1406 gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1407
1408 kfree(gl[i]);
1409 }
1410 qedi_free_bdq(qedi);
1411 qedi_free_nvm_iscsi_cfg(qedi);
1412 }
1413
1414 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1415 {
1416 int i;
1417 struct scsi_bd *pbl;
1418 u64 *list;
1419 dma_addr_t page;
1420
1421 /* Alloc dma memory for BDQ buffers */
1422 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1423 qedi->bdq[i].buf_addr =
1424 dma_alloc_coherent(&qedi->pdev->dev,
1425 QEDI_BDQ_BUF_SIZE,
1426 &qedi->bdq[i].buf_dma,
1427 GFP_KERNEL);
1428 if (!qedi->bdq[i].buf_addr) {
1429 QEDI_ERR(&qedi->dbg_ctx,
1430 "Could not allocate BDQ buffer %d.\n", i);
1431 return -ENOMEM;
1432 }
1433 }
1434
1435 /* Alloc dma memory for BDQ page buffer list */
1436 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1437 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1438 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1439
1440 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1441 qedi->rq_num_entries);
1442
1443 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1444 qedi->bdq_pbl_mem_size,
1445 &qedi->bdq_pbl_dma, GFP_KERNEL);
1446 if (!qedi->bdq_pbl) {
1447 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1448 return -ENOMEM;
1449 }
1450
1451 /*
1452 * Populate BDQ PBL with physical and virtual address of individual
1453 * BDQ buffers
1454 */
1455 pbl = (struct scsi_bd *)qedi->bdq_pbl;
1456 for (i = 0; i < QEDI_BDQ_NUM; i++) {
1457 pbl->address.hi =
1458 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1459 pbl->address.lo =
1460 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1461 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1462 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1463 pbl, pbl->address.hi, pbl->address.lo, i);
1464 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1465 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1466 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1467 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1468 pbl++;
1469 }
1470
1471 /* Allocate list of PBL pages */
1472 qedi->bdq_pbl_list = dma_zalloc_coherent(&qedi->pdev->dev, PAGE_SIZE,
1473 &qedi->bdq_pbl_list_dma,
1474 GFP_KERNEL);
1475 if (!qedi->bdq_pbl_list) {
1476 QEDI_ERR(&qedi->dbg_ctx,
1477 "Could not allocate list of PBL pages.\n");
1478 return -ENOMEM;
1479 }
1480
1481 /*
1482 * Now populate PBL list with pages that contain pointers to the
1483 * individual buffers.
1484 */
1485 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1486 list = (u64 *)qedi->bdq_pbl_list;
1487 page = qedi->bdq_pbl_list_dma;
1488 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1489 *list = qedi->bdq_pbl_dma;
1490 list++;
1491 page += PAGE_SIZE;
1492 }
1493
1494 return 0;
1495 }
1496
1497 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1498 {
1499 u32 *list;
1500 int i;
1501 int status = 0, rc;
1502 u32 *pbl;
1503 dma_addr_t page;
1504 int num_pages;
1505
1506 /*
1507 * Number of global queues (CQ / RQ). This should
1508 * be <= number of available MSIX vectors for the PF
1509 */
1510 if (!qedi->num_queues) {
1511 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1512 return 1;
1513 }
1514
1515 /* Make sure we allocated the PBL that will contain the physical
1516 * addresses of our queues
1517 */
1518 if (!qedi->p_cpuq) {
1519 status = 1;
1520 goto mem_alloc_failure;
1521 }
1522
1523 qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1524 qedi->num_queues), GFP_KERNEL);
1525 if (!qedi->global_queues) {
1526 QEDI_ERR(&qedi->dbg_ctx,
1527 "Unable to allocate global queues array ptr memory\n");
1528 return -ENOMEM;
1529 }
1530 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1531 "qedi->global_queues=%p.\n", qedi->global_queues);
1532
1533 /* Allocate DMA coherent buffers for BDQ */
1534 rc = qedi_alloc_bdq(qedi);
1535 if (rc)
1536 goto mem_alloc_failure;
1537
1538 /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1539 rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1540 if (rc)
1541 goto mem_alloc_failure;
1542
1543 /* Allocate a CQ and an associated PBL for each MSI-X
1544 * vector.
1545 */
1546 for (i = 0; i < qedi->num_queues; i++) {
1547 qedi->global_queues[i] =
1548 kzalloc(sizeof(*qedi->global_queues[0]),
1549 GFP_KERNEL);
1550 if (!qedi->global_queues[i]) {
1551 QEDI_ERR(&qedi->dbg_ctx,
1552 "Unable to allocation global queue %d.\n", i);
1553 goto mem_alloc_failure;
1554 }
1555
1556 qedi->global_queues[i]->cq_mem_size =
1557 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1558 qedi->global_queues[i]->cq_mem_size =
1559 (qedi->global_queues[i]->cq_mem_size +
1560 (QEDI_PAGE_SIZE - 1));
1561
1562 qedi->global_queues[i]->cq_pbl_size =
1563 (qedi->global_queues[i]->cq_mem_size /
1564 QEDI_PAGE_SIZE) * sizeof(void *);
1565 qedi->global_queues[i]->cq_pbl_size =
1566 (qedi->global_queues[i]->cq_pbl_size +
1567 (QEDI_PAGE_SIZE - 1));
1568
1569 qedi->global_queues[i]->cq = dma_zalloc_coherent(&qedi->pdev->dev,
1570 qedi->global_queues[i]->cq_mem_size,
1571 &qedi->global_queues[i]->cq_dma,
1572 GFP_KERNEL);
1573
1574 if (!qedi->global_queues[i]->cq) {
1575 QEDI_WARN(&qedi->dbg_ctx,
1576 "Could not allocate cq.\n");
1577 status = -ENOMEM;
1578 goto mem_alloc_failure;
1579 }
1580 qedi->global_queues[i]->cq_pbl = dma_zalloc_coherent(&qedi->pdev->dev,
1581 qedi->global_queues[i]->cq_pbl_size,
1582 &qedi->global_queues[i]->cq_pbl_dma,
1583 GFP_KERNEL);
1584
1585 if (!qedi->global_queues[i]->cq_pbl) {
1586 QEDI_WARN(&qedi->dbg_ctx,
1587 "Could not allocate cq PBL.\n");
1588 status = -ENOMEM;
1589 goto mem_alloc_failure;
1590 }
1591
1592 /* Create PBL */
1593 num_pages = qedi->global_queues[i]->cq_mem_size /
1594 QEDI_PAGE_SIZE;
1595 page = qedi->global_queues[i]->cq_dma;
1596 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1597
1598 while (num_pages--) {
1599 *pbl = (u32)page;
1600 pbl++;
1601 *pbl = (u32)((u64)page >> 32);
1602 pbl++;
1603 page += QEDI_PAGE_SIZE;
1604 }
1605 }
1606
1607 list = (u32 *)qedi->p_cpuq;
1608
1609 /*
1610 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1611 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points
1612 * to the physical address which contains an array of pointers to the
1613 * physical addresses of the specific queue pages.
1614 */
1615 for (i = 0; i < qedi->num_queues; i++) {
1616 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1617 list++;
1618 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1619 list++;
1620
1621 *list = (u32)0;
1622 list++;
1623 *list = (u32)((u64)0 >> 32);
1624 list++;
1625 }
1626
1627 return 0;
1628
1629 mem_alloc_failure:
1630 qedi_free_global_queues(qedi);
1631 return status;
1632 }
1633
1634 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1635 {
1636 int rval = 0;
1637 u32 *pbl;
1638 dma_addr_t page;
1639 int num_pages;
1640
1641 if (!ep)
1642 return -EIO;
1643
1644 /* Calculate appropriate queue and PBL sizes */
1645 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1646 ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1647
1648 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1649 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1650
1651 ep->sq = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1652 &ep->sq_dma, GFP_KERNEL);
1653 if (!ep->sq) {
1654 QEDI_WARN(&qedi->dbg_ctx,
1655 "Could not allocate send queue.\n");
1656 rval = -ENOMEM;
1657 goto out;
1658 }
1659 ep->sq_pbl = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1660 &ep->sq_pbl_dma, GFP_KERNEL);
1661 if (!ep->sq_pbl) {
1662 QEDI_WARN(&qedi->dbg_ctx,
1663 "Could not allocate send queue PBL.\n");
1664 rval = -ENOMEM;
1665 goto out_free_sq;
1666 }
1667
1668 /* Create PBL */
1669 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1670 page = ep->sq_dma;
1671 pbl = (u32 *)ep->sq_pbl;
1672
1673 while (num_pages--) {
1674 *pbl = (u32)page;
1675 pbl++;
1676 *pbl = (u32)((u64)page >> 32);
1677 pbl++;
1678 page += QEDI_PAGE_SIZE;
1679 }
1680
1681 return rval;
1682
1683 out_free_sq:
1684 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1685 ep->sq_dma);
1686 out:
1687 return rval;
1688 }
1689
1690 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1691 {
1692 if (ep->sq_pbl)
1693 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1694 ep->sq_pbl_dma);
1695 if (ep->sq)
1696 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1697 ep->sq_dma);
1698 }
1699
1700 int qedi_get_task_idx(struct qedi_ctx *qedi)
1701 {
1702 s16 tmp_idx;
1703
1704 again:
1705 tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1706 MAX_ISCSI_TASK_ENTRIES);
1707
1708 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1709 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1710 tmp_idx = -1;
1711 goto err_idx;
1712 }
1713
1714 if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1715 goto again;
1716
1717 err_idx:
1718 return tmp_idx;
1719 }
1720
1721 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1722 {
1723 if (!test_and_clear_bit(idx, qedi->task_idx_map))
1724 QEDI_ERR(&qedi->dbg_ctx,
1725 "FW task context, already cleared, tid=0x%x\n", idx);
1726 }
1727
1728 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1729 struct qedi_cmd *cmd)
1730 {
1731 qedi->itt_map[tid].itt = proto_itt;
1732 qedi->itt_map[tid].p_cmd = cmd;
1733
1734 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1735 "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1736 qedi->itt_map[tid].itt);
1737 }
1738
1739 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1740 {
1741 u16 i;
1742
1743 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1744 if (qedi->itt_map[i].itt == itt) {
1745 *tid = i;
1746 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1747 "Ref itt=0x%x, found at tid=0x%x\n",
1748 itt, *tid);
1749 return;
1750 }
1751 }
1752
1753 WARN_ON(1);
1754 }
1755
1756 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1757 {
1758 *proto_itt = qedi->itt_map[tid].itt;
1759 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1760 "Get itt map tid [0x%x with proto itt[0x%x]",
1761 tid, *proto_itt);
1762 }
1763
1764 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1765 {
1766 struct qedi_cmd *cmd = NULL;
1767
1768 if (tid >= MAX_ISCSI_TASK_ENTRIES)
1769 return NULL;
1770
1771 cmd = qedi->itt_map[tid].p_cmd;
1772 if (cmd->task_id != tid)
1773 return NULL;
1774
1775 qedi->itt_map[tid].p_cmd = NULL;
1776
1777 return cmd;
1778 }
1779
1780 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1781 {
1782 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1783 sizeof(struct qedi_itt_map), GFP_KERNEL);
1784 if (!qedi->itt_map) {
1785 QEDI_ERR(&qedi->dbg_ctx,
1786 "Unable to allocate itt map array memory\n");
1787 return -ENOMEM;
1788 }
1789 return 0;
1790 }
1791
1792 static void qedi_free_itt(struct qedi_ctx *qedi)
1793 {
1794 kfree(qedi->itt_map);
1795 }
1796
1797 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1798 .rx_cb = qedi_ll2_rx,
1799 .tx_cb = NULL,
1800 };
1801
1802 static int qedi_percpu_io_thread(void *arg)
1803 {
1804 struct qedi_percpu_s *p = arg;
1805 struct qedi_work *work, *tmp;
1806 unsigned long flags;
1807 LIST_HEAD(work_list);
1808
1809 set_user_nice(current, -20);
1810
1811 while (!kthread_should_stop()) {
1812 spin_lock_irqsave(&p->p_work_lock, flags);
1813 while (!list_empty(&p->work_list)) {
1814 list_splice_init(&p->work_list, &work_list);
1815 spin_unlock_irqrestore(&p->p_work_lock, flags);
1816
1817 list_for_each_entry_safe(work, tmp, &work_list, list) {
1818 list_del_init(&work->list);
1819 qedi_fp_process_cqes(work);
1820 if (!work->is_solicited)
1821 kfree(work);
1822 }
1823 cond_resched();
1824 spin_lock_irqsave(&p->p_work_lock, flags);
1825 }
1826 set_current_state(TASK_INTERRUPTIBLE);
1827 spin_unlock_irqrestore(&p->p_work_lock, flags);
1828 schedule();
1829 }
1830 __set_current_state(TASK_RUNNING);
1831
1832 return 0;
1833 }
1834
1835 static int qedi_cpu_online(unsigned int cpu)
1836 {
1837 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1838 struct task_struct *thread;
1839
1840 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1841 cpu_to_node(cpu),
1842 "qedi_thread/%d", cpu);
1843 if (IS_ERR(thread))
1844 return PTR_ERR(thread);
1845
1846 kthread_bind(thread, cpu);
1847 p->iothread = thread;
1848 wake_up_process(thread);
1849 return 0;
1850 }
1851
1852 static int qedi_cpu_offline(unsigned int cpu)
1853 {
1854 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1855 struct qedi_work *work, *tmp;
1856 struct task_struct *thread;
1857
1858 spin_lock_bh(&p->p_work_lock);
1859 thread = p->iothread;
1860 p->iothread = NULL;
1861
1862 list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1863 list_del_init(&work->list);
1864 qedi_fp_process_cqes(work);
1865 if (!work->is_solicited)
1866 kfree(work);
1867 }
1868
1869 spin_unlock_bh(&p->p_work_lock);
1870 if (thread)
1871 kthread_stop(thread);
1872 return 0;
1873 }
1874
1875 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1876 {
1877 struct qed_ll2_params params;
1878
1879 qedi_recover_all_conns(qedi);
1880
1881 qedi_ops->ll2->stop(qedi->cdev);
1882 qedi_ll2_free_skbs(qedi);
1883
1884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1885 qedi->ll2_mtu, mtu);
1886 memset(&params, 0, sizeof(params));
1887 qedi->ll2_mtu = mtu;
1888 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1889 params.drop_ttl0_packets = 0;
1890 params.rx_vlan_stripping = 1;
1891 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1892 qedi_ops->ll2->start(qedi->cdev, &params);
1893 }
1894
1895 /**
1896 * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1897 * for gaps) for the matching absolute-pf-id of the QEDI device.
1898 */
1899 static struct nvm_iscsi_block *
1900 qedi_get_nvram_block(struct qedi_ctx *qedi)
1901 {
1902 int i;
1903 u8 pf;
1904 u32 flags;
1905 struct nvm_iscsi_block *block;
1906
1907 pf = qedi->dev_info.common.abs_pf_id;
1908 block = &qedi->iscsi_cfg->block[0];
1909 for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1910 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1911 NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1912 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1913 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1914 (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1915 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1916 return block;
1917 }
1918 return NULL;
1919 }
1920
1921 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1922 {
1923 struct qedi_ctx *qedi = data;
1924 struct nvm_iscsi_initiator *initiator;
1925 int rc = 1;
1926 u32 ipv6_en, dhcp_en, ip_len;
1927 struct nvm_iscsi_block *block;
1928 char *fmt, *ip, *sub, *gw;
1929
1930 block = qedi_get_nvram_block(qedi);
1931 if (!block)
1932 return 0;
1933
1934 initiator = &block->initiator;
1935 ipv6_en = block->generic.ctrl_flags &
1936 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1937 dhcp_en = block->generic.ctrl_flags &
1938 NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1939 /* Static IP assignments. */
1940 fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1941 ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1942 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1943 sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1944 initiator->ipv4.subnet_mask.byte;
1945 gw = ipv6_en ? initiator->ipv6.gateway.byte :
1946 initiator->ipv4.gateway.byte;
1947 /* DHCP IP adjustments. */
1948 fmt = dhcp_en ? "%s\n" : fmt;
1949 if (dhcp_en) {
1950 ip = ipv6_en ? "0::0" : "0.0.0.0";
1951 sub = ip;
1952 gw = ip;
1953 ip_len = ipv6_en ? 5 : 8;
1954 }
1955
1956 switch (type) {
1957 case ISCSI_BOOT_ETH_IP_ADDR:
1958 rc = snprintf(buf, ip_len, fmt, ip);
1959 break;
1960 case ISCSI_BOOT_ETH_SUBNET_MASK:
1961 rc = snprintf(buf, ip_len, fmt, sub);
1962 break;
1963 case ISCSI_BOOT_ETH_GATEWAY:
1964 rc = snprintf(buf, ip_len, fmt, gw);
1965 break;
1966 case ISCSI_BOOT_ETH_FLAGS:
1967 rc = snprintf(buf, 3, "%hhd\n",
1968 SYSFS_FLAG_FW_SEL_BOOT);
1969 break;
1970 case ISCSI_BOOT_ETH_INDEX:
1971 rc = snprintf(buf, 3, "0\n");
1972 break;
1973 case ISCSI_BOOT_ETH_MAC:
1974 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
1975 break;
1976 case ISCSI_BOOT_ETH_VLAN:
1977 rc = snprintf(buf, 12, "%d\n",
1978 GET_FIELD2(initiator->generic_cont0,
1979 NVM_ISCSI_CFG_INITIATOR_VLAN));
1980 break;
1981 case ISCSI_BOOT_ETH_ORIGIN:
1982 if (dhcp_en)
1983 rc = snprintf(buf, 3, "3\n");
1984 break;
1985 default:
1986 rc = 0;
1987 break;
1988 }
1989
1990 return rc;
1991 }
1992
1993 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1994 {
1995 int rc = 1;
1996
1997 switch (type) {
1998 case ISCSI_BOOT_ETH_FLAGS:
1999 case ISCSI_BOOT_ETH_MAC:
2000 case ISCSI_BOOT_ETH_INDEX:
2001 case ISCSI_BOOT_ETH_IP_ADDR:
2002 case ISCSI_BOOT_ETH_SUBNET_MASK:
2003 case ISCSI_BOOT_ETH_GATEWAY:
2004 case ISCSI_BOOT_ETH_ORIGIN:
2005 case ISCSI_BOOT_ETH_VLAN:
2006 rc = 0444;
2007 break;
2008 default:
2009 rc = 0;
2010 break;
2011 }
2012 return rc;
2013 }
2014
2015 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2016 {
2017 struct qedi_ctx *qedi = data;
2018 struct nvm_iscsi_initiator *initiator;
2019 int rc;
2020 struct nvm_iscsi_block *block;
2021
2022 block = qedi_get_nvram_block(qedi);
2023 if (!block)
2024 return 0;
2025
2026 initiator = &block->initiator;
2027
2028 switch (type) {
2029 case ISCSI_BOOT_INI_INITIATOR_NAME:
2030 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2031 initiator->initiator_name.byte);
2032 break;
2033 default:
2034 rc = 0;
2035 break;
2036 }
2037 return rc;
2038 }
2039
2040 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2041 {
2042 int rc;
2043
2044 switch (type) {
2045 case ISCSI_BOOT_INI_INITIATOR_NAME:
2046 rc = 0444;
2047 break;
2048 default:
2049 rc = 0;
2050 break;
2051 }
2052 return rc;
2053 }
2054
2055 static ssize_t
2056 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2057 char *buf, enum qedi_nvm_tgts idx)
2058 {
2059 int rc = 1;
2060 u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2061 struct nvm_iscsi_block *block;
2062 char *chap_name, *chap_secret;
2063 char *mchap_name, *mchap_secret;
2064
2065 block = qedi_get_nvram_block(qedi);
2066 if (!block)
2067 goto exit_show_tgt_info;
2068
2069 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2070 "Port:%d, tgt_idx:%d\n",
2071 GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2072
2073 ctrl_flags = block->target[idx].ctrl_flags &
2074 NVM_ISCSI_CFG_TARGET_ENABLED;
2075
2076 if (!ctrl_flags) {
2077 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2078 "Target disabled\n");
2079 goto exit_show_tgt_info;
2080 }
2081
2082 ipv6_en = block->generic.ctrl_flags &
2083 NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2084 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2085 chap_en = block->generic.ctrl_flags &
2086 NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2087 chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2088 chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2089
2090 mchap_en = block->generic.ctrl_flags &
2091 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2092 mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2093 mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2094
2095 switch (type) {
2096 case ISCSI_BOOT_TGT_NAME:
2097 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2098 block->target[idx].target_name.byte);
2099 break;
2100 case ISCSI_BOOT_TGT_IP_ADDR:
2101 if (ipv6_en)
2102 rc = snprintf(buf, ip_len, "%pI6\n",
2103 block->target[idx].ipv6_addr.byte);
2104 else
2105 rc = snprintf(buf, ip_len, "%pI4\n",
2106 block->target[idx].ipv4_addr.byte);
2107 break;
2108 case ISCSI_BOOT_TGT_PORT:
2109 rc = snprintf(buf, 12, "%d\n",
2110 GET_FIELD2(block->target[idx].generic_cont0,
2111 NVM_ISCSI_CFG_TARGET_TCP_PORT));
2112 break;
2113 case ISCSI_BOOT_TGT_LUN:
2114 rc = snprintf(buf, 22, "%.*d\n",
2115 block->target[idx].lun.value[1],
2116 block->target[idx].lun.value[0]);
2117 break;
2118 case ISCSI_BOOT_TGT_CHAP_NAME:
2119 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2120 chap_name);
2121 break;
2122 case ISCSI_BOOT_TGT_CHAP_SECRET:
2123 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2124 chap_secret);
2125 break;
2126 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2127 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2128 mchap_name);
2129 break;
2130 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2131 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2132 mchap_secret);
2133 break;
2134 case ISCSI_BOOT_TGT_FLAGS:
2135 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2136 break;
2137 case ISCSI_BOOT_TGT_NIC_ASSOC:
2138 rc = snprintf(buf, 3, "0\n");
2139 break;
2140 default:
2141 rc = 0;
2142 break;
2143 }
2144
2145 exit_show_tgt_info:
2146 return rc;
2147 }
2148
2149 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2150 {
2151 struct qedi_ctx *qedi = data;
2152
2153 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2154 }
2155
2156 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2157 {
2158 struct qedi_ctx *qedi = data;
2159
2160 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2161 }
2162
2163 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2164 {
2165 int rc;
2166
2167 switch (type) {
2168 case ISCSI_BOOT_TGT_NAME:
2169 case ISCSI_BOOT_TGT_IP_ADDR:
2170 case ISCSI_BOOT_TGT_PORT:
2171 case ISCSI_BOOT_TGT_LUN:
2172 case ISCSI_BOOT_TGT_CHAP_NAME:
2173 case ISCSI_BOOT_TGT_CHAP_SECRET:
2174 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2175 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2176 case ISCSI_BOOT_TGT_NIC_ASSOC:
2177 case ISCSI_BOOT_TGT_FLAGS:
2178 rc = 0444;
2179 break;
2180 default:
2181 rc = 0;
2182 break;
2183 }
2184 return rc;
2185 }
2186
2187 static void qedi_boot_release(void *data)
2188 {
2189 struct qedi_ctx *qedi = data;
2190
2191 scsi_host_put(qedi->shost);
2192 }
2193
2194 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2195 {
2196 int ret = 1;
2197 u16 len;
2198
2199 len = sizeof(struct nvm_iscsi_cfg);
2200
2201 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2202 "Get NVM iSCSI CFG image\n");
2203 ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2204 QED_NVM_IMAGE_ISCSI_CFG,
2205 (char *)qedi->iscsi_cfg, len);
2206 if (ret)
2207 QEDI_ERR(&qedi->dbg_ctx,
2208 "Could not get NVM image. ret = %d\n", ret);
2209
2210 return ret;
2211 }
2212
2213 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2214 {
2215 struct iscsi_boot_kobj *boot_kobj;
2216
2217 if (qedi_get_boot_info(qedi))
2218 return -EPERM;
2219
2220 qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2221 if (!qedi->boot_kset)
2222 goto kset_free;
2223
2224 if (!scsi_host_get(qedi->shost))
2225 goto kset_free;
2226
2227 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2228 qedi_show_boot_tgt_pri_info,
2229 qedi_tgt_get_attr_visibility,
2230 qedi_boot_release);
2231 if (!boot_kobj)
2232 goto put_host;
2233
2234 if (!scsi_host_get(qedi->shost))
2235 goto kset_free;
2236
2237 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2238 qedi_show_boot_tgt_sec_info,
2239 qedi_tgt_get_attr_visibility,
2240 qedi_boot_release);
2241 if (!boot_kobj)
2242 goto put_host;
2243
2244 if (!scsi_host_get(qedi->shost))
2245 goto kset_free;
2246
2247 boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2248 qedi_show_boot_ini_info,
2249 qedi_ini_get_attr_visibility,
2250 qedi_boot_release);
2251 if (!boot_kobj)
2252 goto put_host;
2253
2254 if (!scsi_host_get(qedi->shost))
2255 goto kset_free;
2256
2257 boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2258 qedi_show_boot_eth_info,
2259 qedi_eth_get_attr_visibility,
2260 qedi_boot_release);
2261 if (!boot_kobj)
2262 goto put_host;
2263
2264 return 0;
2265
2266 put_host:
2267 scsi_host_put(qedi->shost);
2268 kset_free:
2269 iscsi_boot_destroy_kset(qedi->boot_kset);
2270 return -ENOMEM;
2271 }
2272
2273 static void __qedi_remove(struct pci_dev *pdev, int mode)
2274 {
2275 struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2276
2277 if (qedi->tmf_thread) {
2278 flush_workqueue(qedi->tmf_thread);
2279 destroy_workqueue(qedi->tmf_thread);
2280 qedi->tmf_thread = NULL;
2281 }
2282
2283 if (qedi->offload_thread) {
2284 flush_workqueue(qedi->offload_thread);
2285 destroy_workqueue(qedi->offload_thread);
2286 qedi->offload_thread = NULL;
2287 }
2288
2289 #ifdef CONFIG_DEBUG_FS
2290 qedi_dbg_host_exit(&qedi->dbg_ctx);
2291 #endif
2292 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2293 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2294
2295 qedi_sync_free_irqs(qedi);
2296
2297 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2298 qedi_ops->stop(qedi->cdev);
2299 qedi_ops->ll2->stop(qedi->cdev);
2300 }
2301
2302 if (mode == QEDI_MODE_NORMAL)
2303 qedi_free_iscsi_pf_param(qedi);
2304
2305 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2306 qedi_ops->common->slowpath_stop(qedi->cdev);
2307 qedi_ops->common->remove(qedi->cdev);
2308 }
2309
2310 qedi_destroy_fp(qedi);
2311
2312 if (mode == QEDI_MODE_NORMAL) {
2313 qedi_release_cid_que(qedi);
2314 qedi_cm_free_mem(qedi);
2315 qedi_free_uio(qedi->udev);
2316 qedi_free_itt(qedi);
2317
2318 iscsi_host_remove(qedi->shost);
2319 iscsi_host_free(qedi->shost);
2320
2321 if (qedi->ll2_recv_thread) {
2322 kthread_stop(qedi->ll2_recv_thread);
2323 qedi->ll2_recv_thread = NULL;
2324 }
2325 qedi_ll2_free_skbs(qedi);
2326
2327 if (qedi->boot_kset)
2328 iscsi_boot_destroy_kset(qedi->boot_kset);
2329 }
2330 }
2331
2332 static int __qedi_probe(struct pci_dev *pdev, int mode)
2333 {
2334 struct qedi_ctx *qedi;
2335 struct qed_ll2_params params;
2336 u32 dp_module = 0;
2337 u8 dp_level = 0;
2338 bool is_vf = false;
2339 char host_buf[16];
2340 struct qed_link_params link_params;
2341 struct qed_slowpath_params sp_params;
2342 struct qed_probe_params qed_params;
2343 void *task_start, *task_end;
2344 int rc;
2345 u16 tmp;
2346
2347 if (mode != QEDI_MODE_RECOVERY) {
2348 qedi = qedi_host_alloc(pdev);
2349 if (!qedi) {
2350 rc = -ENOMEM;
2351 goto exit_probe;
2352 }
2353 } else {
2354 qedi = pci_get_drvdata(pdev);
2355 }
2356
2357 memset(&qed_params, 0, sizeof(qed_params));
2358 qed_params.protocol = QED_PROTOCOL_ISCSI;
2359 qed_params.dp_module = dp_module;
2360 qed_params.dp_level = dp_level;
2361 qed_params.is_vf = is_vf;
2362 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2363 if (!qedi->cdev) {
2364 rc = -ENODEV;
2365 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2366 goto free_host;
2367 }
2368
2369 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2370
2371 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2372 if (rc)
2373 goto free_host;
2374
2375 if (mode != QEDI_MODE_RECOVERY) {
2376 rc = qedi_set_iscsi_pf_param(qedi);
2377 if (rc) {
2378 rc = -ENOMEM;
2379 QEDI_ERR(&qedi->dbg_ctx,
2380 "Set iSCSI pf param fail\n");
2381 goto free_host;
2382 }
2383 }
2384
2385 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2386
2387 rc = qedi_prepare_fp(qedi);
2388 if (rc) {
2389 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2390 goto free_pf_params;
2391 }
2392
2393 /* Start the Slowpath-process */
2394 memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2395 sp_params.int_mode = QED_INT_MODE_MSIX;
2396 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2397 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2398 sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2399 sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2400 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2401 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2402 if (rc) {
2403 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2404 goto stop_hw;
2405 }
2406
2407 /* update_pf_params needs to be called before and after slowpath
2408 * start
2409 */
2410 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2411
2412 rc = qedi_setup_int(qedi);
2413 if (rc)
2414 goto stop_iscsi_func;
2415
2416 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2417
2418 /* Learn information crucial for qedi to progress */
2419 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2420 if (rc)
2421 goto stop_iscsi_func;
2422
2423 /* Record BDQ producer doorbell addresses */
2424 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2425 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2426 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2427 "BDQ primary_prod=%p secondary_prod=%p.\n",
2428 qedi->bdq_primary_prod,
2429 qedi->bdq_secondary_prod);
2430
2431 /*
2432 * We need to write the number of BDs in the BDQ we've preallocated so
2433 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2434 * packet arrives.
2435 */
2436 qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2437 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2438 "Writing %d to primary and secondary BDQ doorbell registers.\n",
2439 qedi->bdq_prod_idx);
2440 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2441 tmp = readw(qedi->bdq_primary_prod);
2442 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2443 tmp = readw(qedi->bdq_secondary_prod);
2444
2445 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2446 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2447 qedi->mac);
2448
2449 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2450 qedi_ops->common->set_name(qedi->cdev, host_buf);
2451
2452 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2453
2454 memset(&params, 0, sizeof(params));
2455 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2456 qedi->ll2_mtu = DEF_PATH_MTU;
2457 params.drop_ttl0_packets = 0;
2458 params.rx_vlan_stripping = 1;
2459 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2460
2461 if (mode != QEDI_MODE_RECOVERY) {
2462 /* set up rx path */
2463 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2464 spin_lock_init(&qedi->ll2_lock);
2465 /* start qedi context */
2466 spin_lock_init(&qedi->hba_lock);
2467 spin_lock_init(&qedi->task_idx_lock);
2468 }
2469 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2470 qedi_ops->ll2->start(qedi->cdev, &params);
2471
2472 if (mode != QEDI_MODE_RECOVERY) {
2473 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2474 (void *)qedi,
2475 "qedi_ll2_thread");
2476 }
2477
2478 rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2479 qedi, qedi_iscsi_event_cb);
2480 if (rc) {
2481 rc = -ENODEV;
2482 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2483 goto stop_slowpath;
2484 }
2485
2486 task_start = qedi_get_task_mem(&qedi->tasks, 0);
2487 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2488 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2489 "Task context start=%p, end=%p block_size=%u.\n",
2490 task_start, task_end, qedi->tasks.size);
2491
2492 memset(&link_params, 0, sizeof(link_params));
2493 link_params.link_up = true;
2494 rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2495 if (rc) {
2496 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2497 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2498 }
2499
2500 #ifdef CONFIG_DEBUG_FS
2501 qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2502 qedi_dbg_fops);
2503 #endif
2504 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2505 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2506 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2507 FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2508
2509 if (mode == QEDI_MODE_NORMAL) {
2510 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2511 QEDI_ERR(&qedi->dbg_ctx,
2512 "Could not add iscsi host\n");
2513 rc = -ENOMEM;
2514 goto remove_host;
2515 }
2516
2517 /* Allocate uio buffers */
2518 rc = qedi_alloc_uio_rings(qedi);
2519 if (rc) {
2520 QEDI_ERR(&qedi->dbg_ctx,
2521 "UIO alloc ring failed err=%d\n", rc);
2522 goto remove_host;
2523 }
2524
2525 rc = qedi_init_uio(qedi);
2526 if (rc) {
2527 QEDI_ERR(&qedi->dbg_ctx,
2528 "UIO init failed, err=%d\n", rc);
2529 goto free_uio;
2530 }
2531
2532 /* host the array on iscsi_conn */
2533 rc = qedi_setup_cid_que(qedi);
2534 if (rc) {
2535 QEDI_ERR(&qedi->dbg_ctx,
2536 "Could not setup cid que\n");
2537 goto free_uio;
2538 }
2539
2540 rc = qedi_cm_alloc_mem(qedi);
2541 if (rc) {
2542 QEDI_ERR(&qedi->dbg_ctx,
2543 "Could not alloc cm memory\n");
2544 goto free_cid_que;
2545 }
2546
2547 rc = qedi_alloc_itt(qedi);
2548 if (rc) {
2549 QEDI_ERR(&qedi->dbg_ctx,
2550 "Could not alloc itt memory\n");
2551 goto free_cid_que;
2552 }
2553
2554 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2555 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2556 if (!qedi->tmf_thread) {
2557 QEDI_ERR(&qedi->dbg_ctx,
2558 "Unable to start tmf thread!\n");
2559 rc = -ENODEV;
2560 goto free_cid_que;
2561 }
2562
2563 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2564 qedi->offload_thread = create_workqueue(host_buf);
2565 if (!qedi->offload_thread) {
2566 QEDI_ERR(&qedi->dbg_ctx,
2567 "Unable to start offload thread!\n");
2568 rc = -ENODEV;
2569 goto free_cid_que;
2570 }
2571
2572 /* F/w needs 1st task context memory entry for performance */
2573 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2574 atomic_set(&qedi->num_offloads, 0);
2575
2576 if (qedi_setup_boot_info(qedi))
2577 QEDI_ERR(&qedi->dbg_ctx,
2578 "No iSCSI boot target configured\n");
2579 }
2580
2581 return 0;
2582
2583 free_cid_que:
2584 qedi_release_cid_que(qedi);
2585 free_uio:
2586 qedi_free_uio(qedi->udev);
2587 remove_host:
2588 #ifdef CONFIG_DEBUG_FS
2589 qedi_dbg_host_exit(&qedi->dbg_ctx);
2590 #endif
2591 iscsi_host_remove(qedi->shost);
2592 stop_iscsi_func:
2593 qedi_ops->stop(qedi->cdev);
2594 stop_slowpath:
2595 qedi_ops->common->slowpath_stop(qedi->cdev);
2596 stop_hw:
2597 qedi_ops->common->remove(qedi->cdev);
2598 free_pf_params:
2599 qedi_free_iscsi_pf_param(qedi);
2600 free_host:
2601 iscsi_host_free(qedi->shost);
2602 exit_probe:
2603 return rc;
2604 }
2605
2606 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2607 {
2608 return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2609 }
2610
2611 static void qedi_remove(struct pci_dev *pdev)
2612 {
2613 __qedi_remove(pdev, QEDI_MODE_NORMAL);
2614 }
2615
2616 static struct pci_device_id qedi_pci_tbl[] = {
2617 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2618 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2619 { 0 },
2620 };
2621 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2622
2623 static enum cpuhp_state qedi_cpuhp_state;
2624
2625 static struct pci_driver qedi_pci_driver = {
2626 .name = QEDI_MODULE_NAME,
2627 .id_table = qedi_pci_tbl,
2628 .probe = qedi_probe,
2629 .remove = qedi_remove,
2630 };
2631
2632 static int __init qedi_init(void)
2633 {
2634 struct qedi_percpu_s *p;
2635 int cpu, rc = 0;
2636
2637 qedi_ops = qed_get_iscsi_ops();
2638 if (!qedi_ops) {
2639 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2640 return -EINVAL;
2641 }
2642
2643 #ifdef CONFIG_DEBUG_FS
2644 qedi_dbg_init("qedi");
2645 #endif
2646
2647 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2648 if (!qedi_scsi_transport) {
2649 QEDI_ERR(NULL, "Could not register qedi transport");
2650 rc = -ENOMEM;
2651 goto exit_qedi_init_1;
2652 }
2653
2654 for_each_possible_cpu(cpu) {
2655 p = &per_cpu(qedi_percpu, cpu);
2656 INIT_LIST_HEAD(&p->work_list);
2657 spin_lock_init(&p->p_work_lock);
2658 p->iothread = NULL;
2659 }
2660
2661 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2662 qedi_cpu_online, qedi_cpu_offline);
2663 if (rc < 0)
2664 goto exit_qedi_init_2;
2665 qedi_cpuhp_state = rc;
2666
2667 rc = pci_register_driver(&qedi_pci_driver);
2668 if (rc) {
2669 QEDI_ERR(NULL, "Failed to register driver\n");
2670 goto exit_qedi_hp;
2671 }
2672
2673 return 0;
2674
2675 exit_qedi_hp:
2676 cpuhp_remove_state(qedi_cpuhp_state);
2677 exit_qedi_init_2:
2678 iscsi_unregister_transport(&qedi_iscsi_transport);
2679 exit_qedi_init_1:
2680 #ifdef CONFIG_DEBUG_FS
2681 qedi_dbg_exit();
2682 #endif
2683 qed_put_iscsi_ops();
2684 return rc;
2685 }
2686
2687 static void __exit qedi_cleanup(void)
2688 {
2689 pci_unregister_driver(&qedi_pci_driver);
2690 cpuhp_remove_state(qedi_cpuhp_state);
2691 iscsi_unregister_transport(&qedi_iscsi_transport);
2692
2693 #ifdef CONFIG_DEBUG_FS
2694 qedi_dbg_exit();
2695 #endif
2696 qed_put_iscsi_ops();
2697 }
2698
2699 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2700 MODULE_LICENSE("GPL");
2701 MODULE_AUTHOR("QLogic Corporation");
2702 MODULE_VERSION(QEDI_MODULE_VERSION);
2703 module_init(qedi_init);
2704 module_exit(qedi_cleanup);
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