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1/*
2 * This file is part of the Chelsio FCoE driver for Linux.
3 *
4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36
37#include <linux/kernel.h>
38#include <linux/module.h>
39#include <linux/init.h>
40#include <linux/pci.h>
41#include <linux/mm.h>
42#include <linux/notifier.h>
43#include <linux/kdebug.h>
44#include <linux/seq_file.h>
45#include <linux/debugfs.h>
46#include <linux/string.h>
47#include <linux/export.h>
48
49#include "csio_init.h"
50#include "csio_defs.h"
51
52#define CSIO_MIN_MEMPOOL_SZ 64
53
54static struct dentry *csio_debugfs_root;
55
56static struct scsi_transport_template *csio_fcoe_transport;
57static struct scsi_transport_template *csio_fcoe_transport_vport;
58
59/*
60 * debugfs support
61 */
62static ssize_t
63csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
64{
65 loff_t pos = *ppos;
66 loff_t avail = file_inode(file)->i_size;
67 unsigned int mem = (uintptr_t)file->private_data & 3;
68 struct csio_hw *hw = file->private_data - mem;
69
70 if (pos < 0)
71 return -EINVAL;
72 if (pos >= avail)
73 return 0;
74 if (count > avail - pos)
75 count = avail - pos;
76
77 while (count) {
78 size_t len;
79 int ret, ofst;
80 __be32 data[16];
81
82 if (mem == MEM_MC)
83 ret = hw->chip_ops->chip_mc_read(hw, 0, pos,
84 data, NULL);
85 else
86 ret = hw->chip_ops->chip_edc_read(hw, mem, pos,
87 data, NULL);
88 if (ret)
89 return ret;
90
91 ofst = pos % sizeof(data);
92 len = min(count, sizeof(data) - ofst);
93 if (copy_to_user(buf, (u8 *)data + ofst, len))
94 return -EFAULT;
95
96 buf += len;
97 pos += len;
98 count -= len;
99 }
100 count = pos - *ppos;
101 *ppos = pos;
102 return count;
103}
104
105static const struct file_operations csio_mem_debugfs_fops = {
106 .owner = THIS_MODULE,
107 .open = simple_open,
108 .read = csio_mem_read,
109 .llseek = default_llseek,
110};
111
112void csio_add_debugfs_mem(struct csio_hw *hw, const char *name,
113 unsigned int idx, unsigned int size_mb)
114{
115 debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root,
116 (void *)hw + idx, &csio_mem_debugfs_fops,
117 size_mb << 20);
118}
119
120static int csio_setup_debugfs(struct csio_hw *hw)
121{
122 int i;
123
124 if (IS_ERR_OR_NULL(hw->debugfs_root))
125 return -1;
126
127 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A);
128 if (i & EDRAM0_ENABLE_F)
129 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
130 if (i & EDRAM1_ENABLE_F)
131 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
132
133 hw->chip_ops->chip_dfs_create_ext_mem(hw);
134 return 0;
135}
136
137/*
138 * csio_dfs_create - Creates and sets up per-hw debugfs.
139 *
140 */
141static int
142csio_dfs_create(struct csio_hw *hw)
143{
144 if (csio_debugfs_root) {
145 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
146 csio_debugfs_root);
147 csio_setup_debugfs(hw);
148 }
149
150 return 0;
151}
152
153/*
154 * csio_dfs_destroy - Destroys per-hw debugfs.
155 */
156static void
157csio_dfs_destroy(struct csio_hw *hw)
158{
159 debugfs_remove_recursive(hw->debugfs_root);
160}
161
162/*
163 * csio_dfs_init - Debug filesystem initialization for the module.
164 *
165 */
166static void
167csio_dfs_init(void)
168{
169 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
170}
171
172/*
173 * csio_dfs_exit - debugfs cleanup for the module.
174 */
175static void
176csio_dfs_exit(void)
177{
178 debugfs_remove(csio_debugfs_root);
179}
180
181/*
182 * csio_pci_init - PCI initialization.
183 * @pdev: PCI device.
184 * @bars: Bitmask of bars to be requested.
185 *
186 * Initializes the PCI function by enabling MMIO, setting bus
187 * mastership and setting DMA mask.
188 */
189static int
190csio_pci_init(struct pci_dev *pdev, int *bars)
191{
192 int rv = -ENODEV;
193
194 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
195
196 if (pci_enable_device_mem(pdev))
197 goto err;
198
199 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
200 goto err_disable_device;
201
202 pci_set_master(pdev);
203 pci_try_set_mwi(pdev);
204
205 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
206 if (rv)
207 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
208 if (rv) {
209 rv = -ENODEV;
210 dev_err(&pdev->dev, "No suitable DMA available.\n");
211 goto err_release_regions;
212 }
213
214 return 0;
215
216err_release_regions:
217 pci_release_selected_regions(pdev, *bars);
218err_disable_device:
219 pci_disable_device(pdev);
220err:
221 return rv;
222
223}
224
225/*
226 * csio_pci_exit - PCI unitialization.
227 * @pdev: PCI device.
228 * @bars: Bars to be released.
229 *
230 */
231static void
232csio_pci_exit(struct pci_dev *pdev, int *bars)
233{
234 pci_release_selected_regions(pdev, *bars);
235 pci_disable_device(pdev);
236}
237
238/*
239 * csio_hw_init_workers - Initialize the HW module's worker threads.
240 * @hw: HW module.
241 *
242 */
243static void
244csio_hw_init_workers(struct csio_hw *hw)
245{
246 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
247}
248
249static void
250csio_hw_exit_workers(struct csio_hw *hw)
251{
252 cancel_work_sync(&hw->evtq_work);
253}
254
255static int
256csio_create_queues(struct csio_hw *hw)
257{
258 int i, j;
259 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
260 int rv;
261 struct csio_scsi_cpu_info *info;
262
263 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
264 return 0;
265
266 if (hw->intr_mode != CSIO_IM_MSIX) {
267 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
268 0, hw->pport[0].portid, false, NULL);
269 if (rv != 0) {
270 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
271 return rv;
272 }
273 }
274
275 /* FW event queue */
276 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
277 csio_get_fwevt_intr_idx(hw),
278 hw->pport[0].portid, true, NULL);
279 if (rv != 0) {
280 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
281 return rv;
282 }
283
284 /* Create mgmt queue */
285 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
286 mgmtm->iq_idx, hw->pport[0].portid, NULL);
287
288 if (rv != 0) {
289 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
290 goto err;
291 }
292
293 /* Create SCSI queues */
294 for (i = 0; i < hw->num_pports; i++) {
295 info = &hw->scsi_cpu_info[i];
296
297 for (j = 0; j < info->max_cpus; j++) {
298 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
299
300 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
301 sqset->intr_idx, i, false, NULL);
302 if (rv != 0) {
303 csio_err(hw,
304 "SCSI module IQ config failed [%d][%d]:%d\n",
305 i, j, rv);
306 goto err;
307 }
308 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
309 sqset->iq_idx, i, NULL);
310 if (rv != 0) {
311 csio_err(hw,
312 "SCSI module EQ config failed [%d][%d]:%d\n",
313 i, j, rv);
314 goto err;
315 }
316 } /* for all CPUs */
317 } /* For all ports */
318
319 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
320 return 0;
321err:
322 csio_wr_destroy_queues(hw, true);
323 return -EINVAL;
324}
325
326/*
327 * csio_config_queues - Configure the DMA queues.
328 * @hw: HW module.
329 *
330 * Allocates memory for queues are registers them with FW.
331 */
332int
333csio_config_queues(struct csio_hw *hw)
334{
335 int i, j, idx, k = 0;
336 int rv;
337 struct csio_scsi_qset *sqset;
338 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
339 struct csio_scsi_qset *orig;
340 struct csio_scsi_cpu_info *info;
341
342 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
343 return csio_create_queues(hw);
344
345 /* Calculate number of SCSI queues for MSIX we would like */
346 hw->num_scsi_msix_cpus = num_online_cpus();
347 hw->num_sqsets = num_online_cpus() * hw->num_pports;
348
349 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
350 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
351 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
352 }
353
354 /* Initialize max_cpus, may get reduced during msix allocations */
355 for (i = 0; i < hw->num_pports; i++)
356 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
357
358 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
359 hw->num_sqsets, hw->num_scsi_msix_cpus);
360
361 csio_intr_enable(hw);
362
363 if (hw->intr_mode != CSIO_IM_MSIX) {
364
365 /* Allocate Forward interrupt iq. */
366 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
367 CSIO_INTR_WRSIZE, CSIO_INGRESS,
368 (void *)hw, 0, 0, NULL);
369 if (hw->intr_iq_idx == -1) {
370 csio_err(hw,
371 "Forward interrupt queue creation failed\n");
372 goto intr_disable;
373 }
374 }
375
376 /* Allocate the FW evt queue */
377 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
378 CSIO_FWEVT_WRSIZE,
379 CSIO_INGRESS, (void *)hw,
380 CSIO_FWEVT_FLBUFS, 0,
381 csio_fwevt_intx_handler);
382 if (hw->fwevt_iq_idx == -1) {
383 csio_err(hw, "FW evt queue creation failed\n");
384 goto intr_disable;
385 }
386
387 /* Allocate the mgmt queue */
388 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
389 CSIO_MGMT_EQ_WRSIZE,
390 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
391 if (mgmtm->eq_idx == -1) {
392 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
393 goto intr_disable;
394 }
395
396 /* Use FW IQ for MGMT req completion */
397 mgmtm->iq_idx = hw->fwevt_iq_idx;
398
399 /* Allocate SCSI queues */
400 for (i = 0; i < hw->num_pports; i++) {
401 info = &hw->scsi_cpu_info[i];
402
403 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
404 sqset = &hw->sqset[i][j];
405
406 if (j >= info->max_cpus) {
407 k = j % info->max_cpus;
408 orig = &hw->sqset[i][k];
409 sqset->eq_idx = orig->eq_idx;
410 sqset->iq_idx = orig->iq_idx;
411 continue;
412 }
413
414 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
415 CSIO_EGRESS, (void *)hw, 0, 0,
416 NULL);
417 if (idx == -1) {
418 csio_err(hw, "EQ creation failed for idx:%d\n",
419 idx);
420 goto intr_disable;
421 }
422
423 sqset->eq_idx = idx;
424
425 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
426 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
427 (void *)hw, 0, 0,
428 csio_scsi_intx_handler);
429 if (idx == -1) {
430 csio_err(hw, "IQ creation failed for idx:%d\n",
431 idx);
432 goto intr_disable;
433 }
434 sqset->iq_idx = idx;
435 } /* for all CPUs */
436 } /* For all ports */
437
438 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
439
440 rv = csio_create_queues(hw);
441 if (rv != 0)
442 goto intr_disable;
443
444 /*
445 * Now request IRQs for the vectors. In the event of a failure,
446 * cleanup is handled internally by this function.
447 */
448 rv = csio_request_irqs(hw);
449 if (rv != 0)
450 return -EINVAL;
451
452 return 0;
453
454intr_disable:
455 csio_intr_disable(hw, false);
456
457 return -EINVAL;
458}
459
460static int
461csio_resource_alloc(struct csio_hw *hw)
462{
463 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
464 int rv = -ENOMEM;
465
466 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
467 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
468
469 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
470 sizeof(struct csio_mb));
471 if (!hw->mb_mempool)
472 goto err;
473
474 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
475 sizeof(struct csio_rnode));
476 if (!hw->rnode_mempool)
477 goto err_free_mb_mempool;
478
479 hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool",
480 &hw->pdev->dev, CSIO_SCSI_RSP_LEN,
481 8, 0);
482 if (!hw->scsi_dma_pool)
483 goto err_free_rn_pool;
484
485 return 0;
486
487err_free_rn_pool:
488 mempool_destroy(hw->rnode_mempool);
489 hw->rnode_mempool = NULL;
490err_free_mb_mempool:
491 mempool_destroy(hw->mb_mempool);
492 hw->mb_mempool = NULL;
493err:
494 return rv;
495}
496
497static void
498csio_resource_free(struct csio_hw *hw)
499{
500 dma_pool_destroy(hw->scsi_dma_pool);
501 hw->scsi_dma_pool = NULL;
502 mempool_destroy(hw->rnode_mempool);
503 hw->rnode_mempool = NULL;
504 mempool_destroy(hw->mb_mempool);
505 hw->mb_mempool = NULL;
506}
507
508/*
509 * csio_hw_alloc - Allocate and initialize the HW module.
510 * @pdev: PCI device.
511 *
512 * Allocates HW structure, DMA, memory resources, maps BARS to
513 * host memory and initializes HW module.
514 */
515static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
516{
517 struct csio_hw *hw;
518
519 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
520 if (!hw)
521 goto err;
522
523 hw->pdev = pdev;
524 strscpy(hw->drv_version, CSIO_DRV_VERSION,
525 sizeof(hw->drv_version));
526
527 /* memory pool/DMA pool allocation */
528 if (csio_resource_alloc(hw))
529 goto err_free_hw;
530
531 /* Get the start address of registers from BAR 0 */
532 hw->regstart = ioremap(pci_resource_start(pdev, 0),
533 pci_resource_len(pdev, 0));
534 if (!hw->regstart) {
535 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
536 hw->regstart);
537 goto err_resource_free;
538 }
539
540 csio_hw_init_workers(hw);
541
542 if (csio_hw_init(hw))
543 goto err_unmap_bar;
544
545 csio_dfs_create(hw);
546
547 csio_dbg(hw, "hw:%p\n", hw);
548
549 return hw;
550
551err_unmap_bar:
552 csio_hw_exit_workers(hw);
553 iounmap(hw->regstart);
554err_resource_free:
555 csio_resource_free(hw);
556err_free_hw:
557 kfree(hw);
558err:
559 return NULL;
560}
561
562/*
563 * csio_hw_free - Uninitialize and free the HW module.
564 * @hw: The HW module
565 *
566 * Disable interrupts, uninit the HW module, free resources, free hw.
567 */
568static void
569csio_hw_free(struct csio_hw *hw)
570{
571 csio_intr_disable(hw, true);
572 csio_hw_exit_workers(hw);
573 csio_hw_exit(hw);
574 iounmap(hw->regstart);
575 csio_dfs_destroy(hw);
576 csio_resource_free(hw);
577 kfree(hw);
578}
579
580/**
581 * csio_shost_init - Create and initialize the lnode module.
582 * @hw: The HW module.
583 * @dev: The device associated with this invocation.
584 * @probe: Called from probe context or not?
585 * @pln: Parent lnode if any.
586 *
587 * Allocates lnode structure via scsi_host_alloc, initializes
588 * shost, initializes lnode module and registers with SCSI ML
589 * via scsi_host_add. This function is shared between physical and
590 * virtual node ports.
591 */
592struct csio_lnode *
593csio_shost_init(struct csio_hw *hw, struct device *dev,
594 bool probe, struct csio_lnode *pln)
595{
596 struct Scsi_Host *shost = NULL;
597 struct csio_lnode *ln;
598
599 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
600 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
601
602 /*
603 * hw->pdev is the physical port's PCI dev structure,
604 * which will be different from the NPIV dev structure.
605 */
606 if (dev == &hw->pdev->dev)
607 shost = scsi_host_alloc(
608 &csio_fcoe_shost_template,
609 sizeof(struct csio_lnode));
610 else
611 shost = scsi_host_alloc(
612 &csio_fcoe_shost_vport_template,
613 sizeof(struct csio_lnode));
614
615 if (!shost)
616 goto err;
617
618 ln = shost_priv(shost);
619 memset(ln, 0, sizeof(struct csio_lnode));
620
621 /* Link common lnode to this lnode */
622 ln->dev_num = (shost->host_no << 16);
623
624 shost->can_queue = CSIO_MAX_QUEUE;
625 shost->this_id = -1;
626 shost->unique_id = shost->host_no;
627 shost->max_cmd_len = 16; /* Max CDB length supported */
628 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
629 hw->fres_info.max_ssns);
630 shost->max_lun = CSIO_MAX_LUN;
631 if (dev == &hw->pdev->dev)
632 shost->transportt = csio_fcoe_transport;
633 else
634 shost->transportt = csio_fcoe_transport_vport;
635
636 /* root lnode */
637 if (!hw->rln)
638 hw->rln = ln;
639
640 /* Other initialization here: Common, Transport specific */
641 if (csio_lnode_init(ln, hw, pln))
642 goto err_shost_put;
643
644 if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev))
645 goto err_lnode_exit;
646
647 return ln;
648
649err_lnode_exit:
650 csio_lnode_exit(ln);
651err_shost_put:
652 scsi_host_put(shost);
653err:
654 return NULL;
655}
656
657/**
658 * csio_shost_exit - De-instantiate the shost.
659 * @ln: The lnode module corresponding to the shost.
660 *
661 */
662void
663csio_shost_exit(struct csio_lnode *ln)
664{
665 struct Scsi_Host *shost = csio_ln_to_shost(ln);
666 struct csio_hw *hw = csio_lnode_to_hw(ln);
667
668 /* Inform transport */
669 fc_remove_host(shost);
670
671 /* Inform SCSI ML */
672 scsi_remove_host(shost);
673
674 /* Flush all the events, so that any rnode removal events
675 * already queued are all handled, before we remove the lnode.
676 */
677 spin_lock_irq(&hw->lock);
678 csio_evtq_flush(hw);
679 spin_unlock_irq(&hw->lock);
680
681 csio_lnode_exit(ln);
682 scsi_host_put(shost);
683}
684
685struct csio_lnode *
686csio_lnode_alloc(struct csio_hw *hw)
687{
688 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
689}
690
691void
692csio_lnodes_block_request(struct csio_hw *hw)
693{
694 struct Scsi_Host *shost;
695 struct csio_lnode *sln;
696 struct csio_lnode *ln;
697 struct list_head *cur_ln, *cur_cln;
698 struct csio_lnode **lnode_list;
699 int cur_cnt = 0, ii;
700
701 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
702 GFP_KERNEL);
703 if (!lnode_list) {
704 csio_err(hw, "Failed to allocate lnodes_list");
705 return;
706 }
707
708 spin_lock_irq(&hw->lock);
709 /* Traverse sibling lnodes */
710 list_for_each(cur_ln, &hw->sln_head) {
711 sln = (struct csio_lnode *) cur_ln;
712 lnode_list[cur_cnt++] = sln;
713
714 /* Traverse children lnodes */
715 list_for_each(cur_cln, &sln->cln_head)
716 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
717 }
718 spin_unlock_irq(&hw->lock);
719
720 for (ii = 0; ii < cur_cnt; ii++) {
721 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
722 ln = lnode_list[ii];
723 shost = csio_ln_to_shost(ln);
724 scsi_block_requests(shost);
725
726 }
727 kfree(lnode_list);
728}
729
730void
731csio_lnodes_unblock_request(struct csio_hw *hw)
732{
733 struct csio_lnode *ln;
734 struct Scsi_Host *shost;
735 struct csio_lnode *sln;
736 struct list_head *cur_ln, *cur_cln;
737 struct csio_lnode **lnode_list;
738 int cur_cnt = 0, ii;
739
740 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
741 GFP_KERNEL);
742 if (!lnode_list) {
743 csio_err(hw, "Failed to allocate lnodes_list");
744 return;
745 }
746
747 spin_lock_irq(&hw->lock);
748 /* Traverse sibling lnodes */
749 list_for_each(cur_ln, &hw->sln_head) {
750 sln = (struct csio_lnode *) cur_ln;
751 lnode_list[cur_cnt++] = sln;
752
753 /* Traverse children lnodes */
754 list_for_each(cur_cln, &sln->cln_head)
755 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
756 }
757 spin_unlock_irq(&hw->lock);
758
759 for (ii = 0; ii < cur_cnt; ii++) {
760 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
761 ln = lnode_list[ii];
762 shost = csio_ln_to_shost(ln);
763 scsi_unblock_requests(shost);
764 }
765 kfree(lnode_list);
766}
767
768void
769csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
770{
771 struct csio_lnode *ln;
772 struct Scsi_Host *shost;
773 struct csio_lnode *sln;
774 struct list_head *cur_ln, *cur_cln;
775 struct csio_lnode **lnode_list;
776 int cur_cnt = 0, ii;
777
778 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
779 GFP_KERNEL);
780 if (!lnode_list) {
781 csio_err(hw, "Failed to allocate lnodes_list");
782 return;
783 }
784
785 spin_lock_irq(&hw->lock);
786 /* Traverse sibling lnodes */
787 list_for_each(cur_ln, &hw->sln_head) {
788 sln = (struct csio_lnode *) cur_ln;
789 if (sln->portid != portid)
790 continue;
791
792 lnode_list[cur_cnt++] = sln;
793
794 /* Traverse children lnodes */
795 list_for_each(cur_cln, &sln->cln_head)
796 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
797 }
798 spin_unlock_irq(&hw->lock);
799
800 for (ii = 0; ii < cur_cnt; ii++) {
801 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
802 ln = lnode_list[ii];
803 shost = csio_ln_to_shost(ln);
804 scsi_block_requests(shost);
805 }
806 kfree(lnode_list);
807}
808
809void
810csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
811{
812 struct csio_lnode *ln;
813 struct Scsi_Host *shost;
814 struct csio_lnode *sln;
815 struct list_head *cur_ln, *cur_cln;
816 struct csio_lnode **lnode_list;
817 int cur_cnt = 0, ii;
818
819 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
820 GFP_KERNEL);
821 if (!lnode_list) {
822 csio_err(hw, "Failed to allocate lnodes_list");
823 return;
824 }
825
826 spin_lock_irq(&hw->lock);
827 /* Traverse sibling lnodes */
828 list_for_each(cur_ln, &hw->sln_head) {
829 sln = (struct csio_lnode *) cur_ln;
830 if (sln->portid != portid)
831 continue;
832 lnode_list[cur_cnt++] = sln;
833
834 /* Traverse children lnodes */
835 list_for_each(cur_cln, &sln->cln_head)
836 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
837 }
838 spin_unlock_irq(&hw->lock);
839
840 for (ii = 0; ii < cur_cnt; ii++) {
841 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
842 ln = lnode_list[ii];
843 shost = csio_ln_to_shost(ln);
844 scsi_unblock_requests(shost);
845 }
846 kfree(lnode_list);
847}
848
849void
850csio_lnodes_exit(struct csio_hw *hw, bool npiv)
851{
852 struct csio_lnode *sln;
853 struct csio_lnode *ln;
854 struct list_head *cur_ln, *cur_cln;
855 struct csio_lnode **lnode_list;
856 int cur_cnt = 0, ii;
857
858 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
859 GFP_KERNEL);
860 if (!lnode_list) {
861 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
862 return;
863 }
864
865 /* Get all child lnodes(NPIV ports) */
866 spin_lock_irq(&hw->lock);
867 list_for_each(cur_ln, &hw->sln_head) {
868 sln = (struct csio_lnode *) cur_ln;
869
870 /* Traverse children lnodes */
871 list_for_each(cur_cln, &sln->cln_head)
872 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
873 }
874 spin_unlock_irq(&hw->lock);
875
876 /* Delete NPIV lnodes */
877 for (ii = 0; ii < cur_cnt; ii++) {
878 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
879 ln = lnode_list[ii];
880 fc_vport_terminate(ln->fc_vport);
881 }
882
883 /* Delete only npiv lnodes */
884 if (npiv)
885 goto free_lnodes;
886
887 cur_cnt = 0;
888 /* Get all physical lnodes */
889 spin_lock_irq(&hw->lock);
890 /* Traverse sibling lnodes */
891 list_for_each(cur_ln, &hw->sln_head) {
892 sln = (struct csio_lnode *) cur_ln;
893 lnode_list[cur_cnt++] = sln;
894 }
895 spin_unlock_irq(&hw->lock);
896
897 /* Delete physical lnodes */
898 for (ii = 0; ii < cur_cnt; ii++) {
899 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
900 csio_shost_exit(lnode_list[ii]);
901 }
902
903free_lnodes:
904 kfree(lnode_list);
905}
906
907/*
908 * csio_lnode_init_post: Set lnode attributes after starting HW.
909 * @ln: lnode.
910 *
911 */
912static void
913csio_lnode_init_post(struct csio_lnode *ln)
914{
915 struct Scsi_Host *shost = csio_ln_to_shost(ln);
916
917 csio_fchost_attr_init(ln);
918
919 scsi_scan_host(shost);
920}
921
922/*
923 * csio_probe_one - Instantiate this function.
924 * @pdev: PCI device
925 * @id: Device ID
926 *
927 * This is the .probe() callback of the driver. This function:
928 * - Initializes the PCI function by enabling MMIO, setting bus
929 * mastership and setting DMA mask.
930 * - Allocates HW structure, DMA, memory resources, maps BARS to
931 * host memory and initializes HW module.
932 * - Allocates lnode structure via scsi_host_alloc, initializes
933 * shost, initialized lnode module and registers with SCSI ML
934 * via scsi_host_add.
935 * - Enables interrupts, and starts the chip by kicking off the
936 * HW state machine.
937 * - Once hardware is ready, initiated scan of the host via
938 * scsi_scan_host.
939 */
940static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
941{
942 int rv;
943 int bars;
944 int i;
945 struct csio_hw *hw;
946 struct csio_lnode *ln;
947
948 /* probe only T5 and T6 cards */
949 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) &&
950 !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK)))
951 return -ENODEV;
952
953 rv = csio_pci_init(pdev, &bars);
954 if (rv)
955 goto err;
956
957 hw = csio_hw_alloc(pdev);
958 if (!hw) {
959 rv = -ENODEV;
960 goto err_pci_exit;
961 }
962
963 if (!pcie_relaxed_ordering_enabled(pdev))
964 hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING;
965
966 pci_set_drvdata(pdev, hw);
967
968 rv = csio_hw_start(hw);
969 if (rv) {
970 if (rv == -EINVAL) {
971 dev_err(&pdev->dev,
972 "Failed to start FW, continuing in debug mode.\n");
973 return 0;
974 }
975 goto err_lnode_exit;
976 }
977
978 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
979 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
980 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
981 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
982 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
983
984 for (i = 0; i < hw->num_pports; i++) {
985 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
986 if (!ln) {
987 rv = -ENODEV;
988 break;
989 }
990 /* Initialize portid */
991 ln->portid = hw->pport[i].portid;
992
993 spin_lock_irq(&hw->lock);
994 if (csio_lnode_start(ln) != 0)
995 rv = -ENODEV;
996 spin_unlock_irq(&hw->lock);
997
998 if (rv)
999 break;
1000
1001 csio_lnode_init_post(ln);
1002 }
1003
1004 if (rv)
1005 goto err_lnode_exit;
1006
1007 return 0;
1008
1009err_lnode_exit:
1010 csio_lnodes_block_request(hw);
1011 spin_lock_irq(&hw->lock);
1012 csio_hw_stop(hw);
1013 spin_unlock_irq(&hw->lock);
1014 csio_lnodes_unblock_request(hw);
1015 csio_lnodes_exit(hw, 0);
1016 csio_hw_free(hw);
1017err_pci_exit:
1018 csio_pci_exit(pdev, &bars);
1019err:
1020 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1021 return rv;
1022}
1023
1024/*
1025 * csio_remove_one - Remove one instance of the driver at this PCI function.
1026 * @pdev: PCI device
1027 *
1028 * Used during hotplug operation.
1029 */
1030static void csio_remove_one(struct pci_dev *pdev)
1031{
1032 struct csio_hw *hw = pci_get_drvdata(pdev);
1033 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1034
1035 csio_lnodes_block_request(hw);
1036 spin_lock_irq(&hw->lock);
1037
1038 /* Stops lnode, Rnode s/m
1039 * Quiesce IOs.
1040 * All sessions with remote ports are unregistered.
1041 */
1042 csio_hw_stop(hw);
1043 spin_unlock_irq(&hw->lock);
1044 csio_lnodes_unblock_request(hw);
1045
1046 csio_lnodes_exit(hw, 0);
1047 csio_hw_free(hw);
1048 csio_pci_exit(pdev, &bars);
1049}
1050
1051/*
1052 * csio_pci_error_detected - PCI error was detected
1053 * @pdev: PCI device
1054 *
1055 */
1056static pci_ers_result_t
1057csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1058{
1059 struct csio_hw *hw = pci_get_drvdata(pdev);
1060
1061 csio_lnodes_block_request(hw);
1062 spin_lock_irq(&hw->lock);
1063
1064 /* Post PCI error detected evt to HW s/m
1065 * HW s/m handles this evt by quiescing IOs, unregisters rports
1066 * and finally takes the device to offline.
1067 */
1068 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1069 spin_unlock_irq(&hw->lock);
1070 csio_lnodes_unblock_request(hw);
1071 csio_lnodes_exit(hw, 0);
1072 csio_intr_disable(hw, true);
1073 pci_disable_device(pdev);
1074 return state == pci_channel_io_perm_failure ?
1075 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1076}
1077
1078/*
1079 * csio_pci_slot_reset - PCI slot has been reset.
1080 * @pdev: PCI device
1081 *
1082 */
1083static pci_ers_result_t
1084csio_pci_slot_reset(struct pci_dev *pdev)
1085{
1086 struct csio_hw *hw = pci_get_drvdata(pdev);
1087 int ready;
1088
1089 if (pci_enable_device(pdev)) {
1090 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1091 return PCI_ERS_RESULT_DISCONNECT;
1092 }
1093
1094 pci_set_master(pdev);
1095 pci_restore_state(pdev);
1096 pci_save_state(pdev);
1097
1098 /* Bring HW s/m to ready state.
1099 * but don't resume IOs.
1100 */
1101 spin_lock_irq(&hw->lock);
1102 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1103 ready = csio_is_hw_ready(hw);
1104 spin_unlock_irq(&hw->lock);
1105
1106 if (ready) {
1107 return PCI_ERS_RESULT_RECOVERED;
1108 } else {
1109 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1110 return PCI_ERS_RESULT_DISCONNECT;
1111 }
1112}
1113
1114/*
1115 * csio_pci_resume - Resume normal operations
1116 * @pdev: PCI device
1117 *
1118 */
1119static void
1120csio_pci_resume(struct pci_dev *pdev)
1121{
1122 struct csio_hw *hw = pci_get_drvdata(pdev);
1123 struct csio_lnode *ln;
1124 int rv = 0;
1125 int i;
1126
1127 /* Bring the LINK UP and Resume IO */
1128
1129 for (i = 0; i < hw->num_pports; i++) {
1130 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1131 if (!ln) {
1132 rv = -ENODEV;
1133 break;
1134 }
1135 /* Initialize portid */
1136 ln->portid = hw->pport[i].portid;
1137
1138 spin_lock_irq(&hw->lock);
1139 if (csio_lnode_start(ln) != 0)
1140 rv = -ENODEV;
1141 spin_unlock_irq(&hw->lock);
1142
1143 if (rv)
1144 break;
1145
1146 csio_lnode_init_post(ln);
1147 }
1148
1149 if (rv)
1150 goto err_resume_exit;
1151
1152 return;
1153
1154err_resume_exit:
1155 csio_lnodes_block_request(hw);
1156 spin_lock_irq(&hw->lock);
1157 csio_hw_stop(hw);
1158 spin_unlock_irq(&hw->lock);
1159 csio_lnodes_unblock_request(hw);
1160 csio_lnodes_exit(hw, 0);
1161 csio_hw_free(hw);
1162 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1163}
1164
1165static struct pci_error_handlers csio_err_handler = {
1166 .error_detected = csio_pci_error_detected,
1167 .slot_reset = csio_pci_slot_reset,
1168 .resume = csio_pci_resume,
1169};
1170
1171/*
1172 * Macros needed to support the PCI Device ID Table ...
1173 */
1174#define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1175 static const struct pci_device_id csio_pci_tbl[] = {
1176/* Define for FCoE uses PF6 */
1177#define CH_PCI_DEVICE_ID_FUNCTION 0x6
1178
1179#define CH_PCI_ID_TABLE_ENTRY(devid) \
1180 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1181
1182#define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1183
1184#include "t4_pci_id_tbl.h"
1185
1186static struct pci_driver csio_pci_driver = {
1187 .name = KBUILD_MODNAME,
1188 .driver = {
1189 .owner = THIS_MODULE,
1190 },
1191 .id_table = csio_pci_tbl,
1192 .probe = csio_probe_one,
1193 .remove = csio_remove_one,
1194 .err_handler = &csio_err_handler,
1195};
1196
1197/*
1198 * csio_init - Chelsio storage driver initialization function.
1199 *
1200 */
1201static int __init
1202csio_init(void)
1203{
1204 int rv = -ENOMEM;
1205
1206 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1207
1208 csio_dfs_init();
1209
1210 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1211 if (!csio_fcoe_transport)
1212 goto err;
1213
1214 csio_fcoe_transport_vport =
1215 fc_attach_transport(&csio_fc_transport_vport_funcs);
1216 if (!csio_fcoe_transport_vport)
1217 goto err_vport;
1218
1219 rv = pci_register_driver(&csio_pci_driver);
1220 if (rv)
1221 goto err_pci;
1222
1223 return 0;
1224
1225err_pci:
1226 fc_release_transport(csio_fcoe_transport_vport);
1227err_vport:
1228 fc_release_transport(csio_fcoe_transport);
1229err:
1230 csio_dfs_exit();
1231 return rv;
1232}
1233
1234/*
1235 * csio_exit - Chelsio storage driver uninitialization .
1236 *
1237 * Function that gets called in the unload path.
1238 */
1239static void __exit
1240csio_exit(void)
1241{
1242 pci_unregister_driver(&csio_pci_driver);
1243 csio_dfs_exit();
1244 fc_release_transport(csio_fcoe_transport_vport);
1245 fc_release_transport(csio_fcoe_transport);
1246}
1247
1248module_init(csio_init);
1249module_exit(csio_exit);
1250MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1251MODULE_DESCRIPTION(CSIO_DRV_DESC);
1252MODULE_LICENSE("Dual BSD/GPL");
1253MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1254MODULE_VERSION(CSIO_DRV_VERSION);
1255MODULE_FIRMWARE(FW_FNAME_T5);
1256MODULE_FIRMWARE(FW_FNAME_T6);
1257MODULE_SOFTDEP("pre: cxgb4");
1/*
2 * This file is part of the Chelsio FCoE driver for Linux.
3 *
4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36
37#include <linux/kernel.h>
38#include <linux/module.h>
39#include <linux/init.h>
40#include <linux/pci.h>
41#include <linux/aer.h>
42#include <linux/mm.h>
43#include <linux/notifier.h>
44#include <linux/kdebug.h>
45#include <linux/seq_file.h>
46#include <linux/debugfs.h>
47#include <linux/string.h>
48#include <linux/export.h>
49
50#include "csio_init.h"
51#include "csio_defs.h"
52
53#define CSIO_MIN_MEMPOOL_SZ 64
54
55static struct dentry *csio_debugfs_root;
56
57static struct scsi_transport_template *csio_fcoe_transport;
58static struct scsi_transport_template *csio_fcoe_transport_vport;
59
60/*
61 * debugfs support
62 */
63static ssize_t
64csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
65{
66 loff_t pos = *ppos;
67 loff_t avail = file_inode(file)->i_size;
68 unsigned int mem = (uintptr_t)file->private_data & 3;
69 struct csio_hw *hw = file->private_data - mem;
70
71 if (pos < 0)
72 return -EINVAL;
73 if (pos >= avail)
74 return 0;
75 if (count > avail - pos)
76 count = avail - pos;
77
78 while (count) {
79 size_t len;
80 int ret, ofst;
81 __be32 data[16];
82
83 if (mem == MEM_MC)
84 ret = hw->chip_ops->chip_mc_read(hw, 0, pos,
85 data, NULL);
86 else
87 ret = hw->chip_ops->chip_edc_read(hw, mem, pos,
88 data, NULL);
89 if (ret)
90 return ret;
91
92 ofst = pos % sizeof(data);
93 len = min(count, sizeof(data) - ofst);
94 if (copy_to_user(buf, (u8 *)data + ofst, len))
95 return -EFAULT;
96
97 buf += len;
98 pos += len;
99 count -= len;
100 }
101 count = pos - *ppos;
102 *ppos = pos;
103 return count;
104}
105
106static const struct file_operations csio_mem_debugfs_fops = {
107 .owner = THIS_MODULE,
108 .open = simple_open,
109 .read = csio_mem_read,
110 .llseek = default_llseek,
111};
112
113void csio_add_debugfs_mem(struct csio_hw *hw, const char *name,
114 unsigned int idx, unsigned int size_mb)
115{
116 struct dentry *de;
117
118 de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root,
119 (void *)hw + idx, &csio_mem_debugfs_fops);
120 if (de && de->d_inode)
121 de->d_inode->i_size = size_mb << 20;
122}
123
124static int csio_setup_debugfs(struct csio_hw *hw)
125{
126 int i;
127
128 if (IS_ERR_OR_NULL(hw->debugfs_root))
129 return -1;
130
131 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE);
132 if (i & EDRAM0_ENABLE)
133 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
134 if (i & EDRAM1_ENABLE)
135 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
136
137 hw->chip_ops->chip_dfs_create_ext_mem(hw);
138 return 0;
139}
140
141/*
142 * csio_dfs_create - Creates and sets up per-hw debugfs.
143 *
144 */
145static int
146csio_dfs_create(struct csio_hw *hw)
147{
148 if (csio_debugfs_root) {
149 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
150 csio_debugfs_root);
151 csio_setup_debugfs(hw);
152 }
153
154 return 0;
155}
156
157/*
158 * csio_dfs_destroy - Destroys per-hw debugfs.
159 */
160static int
161csio_dfs_destroy(struct csio_hw *hw)
162{
163 if (hw->debugfs_root)
164 debugfs_remove_recursive(hw->debugfs_root);
165
166 return 0;
167}
168
169/*
170 * csio_dfs_init - Debug filesystem initialization for the module.
171 *
172 */
173static int
174csio_dfs_init(void)
175{
176 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
177 if (!csio_debugfs_root)
178 pr_warn("Could not create debugfs entry, continuing\n");
179
180 return 0;
181}
182
183/*
184 * csio_dfs_exit - debugfs cleanup for the module.
185 */
186static void
187csio_dfs_exit(void)
188{
189 debugfs_remove(csio_debugfs_root);
190}
191
192/*
193 * csio_pci_init - PCI initialization.
194 * @pdev: PCI device.
195 * @bars: Bitmask of bars to be requested.
196 *
197 * Initializes the PCI function by enabling MMIO, setting bus
198 * mastership and setting DMA mask.
199 */
200static int
201csio_pci_init(struct pci_dev *pdev, int *bars)
202{
203 int rv = -ENODEV;
204
205 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
206
207 if (pci_enable_device_mem(pdev))
208 goto err;
209
210 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
211 goto err_disable_device;
212
213 pci_set_master(pdev);
214 pci_try_set_mwi(pdev);
215
216 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
217 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
218 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
219 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
220 } else {
221 dev_err(&pdev->dev, "No suitable DMA available.\n");
222 goto err_release_regions;
223 }
224
225 return 0;
226
227err_release_regions:
228 pci_release_selected_regions(pdev, *bars);
229err_disable_device:
230 pci_disable_device(pdev);
231err:
232 return rv;
233
234}
235
236/*
237 * csio_pci_exit - PCI unitialization.
238 * @pdev: PCI device.
239 * @bars: Bars to be released.
240 *
241 */
242static void
243csio_pci_exit(struct pci_dev *pdev, int *bars)
244{
245 pci_release_selected_regions(pdev, *bars);
246 pci_disable_device(pdev);
247}
248
249/*
250 * csio_hw_init_workers - Initialize the HW module's worker threads.
251 * @hw: HW module.
252 *
253 */
254static void
255csio_hw_init_workers(struct csio_hw *hw)
256{
257 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
258}
259
260static void
261csio_hw_exit_workers(struct csio_hw *hw)
262{
263 cancel_work_sync(&hw->evtq_work);
264 flush_scheduled_work();
265}
266
267static int
268csio_create_queues(struct csio_hw *hw)
269{
270 int i, j;
271 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
272 int rv;
273 struct csio_scsi_cpu_info *info;
274
275 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
276 return 0;
277
278 if (hw->intr_mode != CSIO_IM_MSIX) {
279 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
280 0, hw->pport[0].portid, false, NULL);
281 if (rv != 0) {
282 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
283 return rv;
284 }
285 }
286
287 /* FW event queue */
288 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
289 csio_get_fwevt_intr_idx(hw),
290 hw->pport[0].portid, true, NULL);
291 if (rv != 0) {
292 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
293 return rv;
294 }
295
296 /* Create mgmt queue */
297 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
298 mgmtm->iq_idx, hw->pport[0].portid, NULL);
299
300 if (rv != 0) {
301 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
302 goto err;
303 }
304
305 /* Create SCSI queues */
306 for (i = 0; i < hw->num_pports; i++) {
307 info = &hw->scsi_cpu_info[i];
308
309 for (j = 0; j < info->max_cpus; j++) {
310 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
311
312 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
313 sqset->intr_idx, i, false, NULL);
314 if (rv != 0) {
315 csio_err(hw,
316 "SCSI module IQ config failed [%d][%d]:%d\n",
317 i, j, rv);
318 goto err;
319 }
320 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
321 sqset->iq_idx, i, NULL);
322 if (rv != 0) {
323 csio_err(hw,
324 "SCSI module EQ config failed [%d][%d]:%d\n",
325 i, j, rv);
326 goto err;
327 }
328 } /* for all CPUs */
329 } /* For all ports */
330
331 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
332 return 0;
333err:
334 csio_wr_destroy_queues(hw, true);
335 return -EINVAL;
336}
337
338/*
339 * csio_config_queues - Configure the DMA queues.
340 * @hw: HW module.
341 *
342 * Allocates memory for queues are registers them with FW.
343 */
344int
345csio_config_queues(struct csio_hw *hw)
346{
347 int i, j, idx, k = 0;
348 int rv;
349 struct csio_scsi_qset *sqset;
350 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
351 struct csio_scsi_qset *orig;
352 struct csio_scsi_cpu_info *info;
353
354 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
355 return csio_create_queues(hw);
356
357 /* Calculate number of SCSI queues for MSIX we would like */
358 hw->num_scsi_msix_cpus = num_online_cpus();
359 hw->num_sqsets = num_online_cpus() * hw->num_pports;
360
361 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
362 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
363 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
364 }
365
366 /* Initialize max_cpus, may get reduced during msix allocations */
367 for (i = 0; i < hw->num_pports; i++)
368 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
369
370 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
371 hw->num_sqsets, hw->num_scsi_msix_cpus);
372
373 csio_intr_enable(hw);
374
375 if (hw->intr_mode != CSIO_IM_MSIX) {
376
377 /* Allocate Forward interrupt iq. */
378 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
379 CSIO_INTR_WRSIZE, CSIO_INGRESS,
380 (void *)hw, 0, 0, NULL);
381 if (hw->intr_iq_idx == -1) {
382 csio_err(hw,
383 "Forward interrupt queue creation failed\n");
384 goto intr_disable;
385 }
386 }
387
388 /* Allocate the FW evt queue */
389 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
390 CSIO_FWEVT_WRSIZE,
391 CSIO_INGRESS, (void *)hw,
392 CSIO_FWEVT_FLBUFS, 0,
393 csio_fwevt_intx_handler);
394 if (hw->fwevt_iq_idx == -1) {
395 csio_err(hw, "FW evt queue creation failed\n");
396 goto intr_disable;
397 }
398
399 /* Allocate the mgmt queue */
400 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
401 CSIO_MGMT_EQ_WRSIZE,
402 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
403 if (mgmtm->eq_idx == -1) {
404 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
405 goto intr_disable;
406 }
407
408 /* Use FW IQ for MGMT req completion */
409 mgmtm->iq_idx = hw->fwevt_iq_idx;
410
411 /* Allocate SCSI queues */
412 for (i = 0; i < hw->num_pports; i++) {
413 info = &hw->scsi_cpu_info[i];
414
415 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
416 sqset = &hw->sqset[i][j];
417
418 if (j >= info->max_cpus) {
419 k = j % info->max_cpus;
420 orig = &hw->sqset[i][k];
421 sqset->eq_idx = orig->eq_idx;
422 sqset->iq_idx = orig->iq_idx;
423 continue;
424 }
425
426 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
427 CSIO_EGRESS, (void *)hw, 0, 0,
428 NULL);
429 if (idx == -1) {
430 csio_err(hw, "EQ creation failed for idx:%d\n",
431 idx);
432 goto intr_disable;
433 }
434
435 sqset->eq_idx = idx;
436
437 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
438 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
439 (void *)hw, 0, 0,
440 csio_scsi_intx_handler);
441 if (idx == -1) {
442 csio_err(hw, "IQ creation failed for idx:%d\n",
443 idx);
444 goto intr_disable;
445 }
446 sqset->iq_idx = idx;
447 } /* for all CPUs */
448 } /* For all ports */
449
450 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
451
452 rv = csio_create_queues(hw);
453 if (rv != 0)
454 goto intr_disable;
455
456 /*
457 * Now request IRQs for the vectors. In the event of a failure,
458 * cleanup is handled internally by this function.
459 */
460 rv = csio_request_irqs(hw);
461 if (rv != 0)
462 return -EINVAL;
463
464 return 0;
465
466intr_disable:
467 csio_intr_disable(hw, false);
468
469 return -EINVAL;
470}
471
472static int
473csio_resource_alloc(struct csio_hw *hw)
474{
475 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
476 int rv = -ENOMEM;
477
478 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
479 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
480
481 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
482 sizeof(struct csio_mb));
483 if (!hw->mb_mempool)
484 goto err;
485
486 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
487 sizeof(struct csio_rnode));
488 if (!hw->rnode_mempool)
489 goto err_free_mb_mempool;
490
491 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev,
492 CSIO_SCSI_RSP_LEN, 8, 0);
493 if (!hw->scsi_pci_pool)
494 goto err_free_rn_pool;
495
496 return 0;
497
498err_free_rn_pool:
499 mempool_destroy(hw->rnode_mempool);
500 hw->rnode_mempool = NULL;
501err_free_mb_mempool:
502 mempool_destroy(hw->mb_mempool);
503 hw->mb_mempool = NULL;
504err:
505 return rv;
506}
507
508static void
509csio_resource_free(struct csio_hw *hw)
510{
511 pci_pool_destroy(hw->scsi_pci_pool);
512 hw->scsi_pci_pool = NULL;
513 mempool_destroy(hw->rnode_mempool);
514 hw->rnode_mempool = NULL;
515 mempool_destroy(hw->mb_mempool);
516 hw->mb_mempool = NULL;
517}
518
519/*
520 * csio_hw_alloc - Allocate and initialize the HW module.
521 * @pdev: PCI device.
522 *
523 * Allocates HW structure, DMA, memory resources, maps BARS to
524 * host memory and initializes HW module.
525 */
526static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
527{
528 struct csio_hw *hw;
529
530 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
531 if (!hw)
532 goto err;
533
534 hw->pdev = pdev;
535 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
536
537 /* memory pool/DMA pool allocation */
538 if (csio_resource_alloc(hw))
539 goto err_free_hw;
540
541 /* Get the start address of registers from BAR 0 */
542 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
543 pci_resource_len(pdev, 0));
544 if (!hw->regstart) {
545 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
546 hw->regstart);
547 goto err_resource_free;
548 }
549
550 csio_hw_init_workers(hw);
551
552 if (csio_hw_init(hw))
553 goto err_unmap_bar;
554
555 csio_dfs_create(hw);
556
557 csio_dbg(hw, "hw:%p\n", hw);
558
559 return hw;
560
561err_unmap_bar:
562 csio_hw_exit_workers(hw);
563 iounmap(hw->regstart);
564err_resource_free:
565 csio_resource_free(hw);
566err_free_hw:
567 kfree(hw);
568err:
569 return NULL;
570}
571
572/*
573 * csio_hw_free - Uninitialize and free the HW module.
574 * @hw: The HW module
575 *
576 * Disable interrupts, uninit the HW module, free resources, free hw.
577 */
578static void
579csio_hw_free(struct csio_hw *hw)
580{
581 csio_intr_disable(hw, true);
582 csio_hw_exit_workers(hw);
583 csio_hw_exit(hw);
584 iounmap(hw->regstart);
585 csio_dfs_destroy(hw);
586 csio_resource_free(hw);
587 kfree(hw);
588}
589
590/**
591 * csio_shost_init - Create and initialize the lnode module.
592 * @hw: The HW module.
593 * @dev: The device associated with this invocation.
594 * @probe: Called from probe context or not?
595 * @os_pln: Parent lnode if any.
596 *
597 * Allocates lnode structure via scsi_host_alloc, initializes
598 * shost, initializes lnode module and registers with SCSI ML
599 * via scsi_host_add. This function is shared between physical and
600 * virtual node ports.
601 */
602struct csio_lnode *
603csio_shost_init(struct csio_hw *hw, struct device *dev,
604 bool probe, struct csio_lnode *pln)
605{
606 struct Scsi_Host *shost = NULL;
607 struct csio_lnode *ln;
608
609 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
610 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
611
612 /*
613 * hw->pdev is the physical port's PCI dev structure,
614 * which will be different from the NPIV dev structure.
615 */
616 if (dev == &hw->pdev->dev)
617 shost = scsi_host_alloc(
618 &csio_fcoe_shost_template,
619 sizeof(struct csio_lnode));
620 else
621 shost = scsi_host_alloc(
622 &csio_fcoe_shost_vport_template,
623 sizeof(struct csio_lnode));
624
625 if (!shost)
626 goto err;
627
628 ln = shost_priv(shost);
629 memset(ln, 0, sizeof(struct csio_lnode));
630
631 /* Link common lnode to this lnode */
632 ln->dev_num = (shost->host_no << 16);
633
634 shost->can_queue = CSIO_MAX_QUEUE;
635 shost->this_id = -1;
636 shost->unique_id = shost->host_no;
637 shost->max_cmd_len = 16; /* Max CDB length supported */
638 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
639 hw->fres_info.max_ssns);
640 shost->max_lun = CSIO_MAX_LUN;
641 if (dev == &hw->pdev->dev)
642 shost->transportt = csio_fcoe_transport;
643 else
644 shost->transportt = csio_fcoe_transport_vport;
645
646 /* root lnode */
647 if (!hw->rln)
648 hw->rln = ln;
649
650 /* Other initialization here: Common, Transport specific */
651 if (csio_lnode_init(ln, hw, pln))
652 goto err_shost_put;
653
654 if (scsi_add_host(shost, dev))
655 goto err_lnode_exit;
656
657 return ln;
658
659err_lnode_exit:
660 csio_lnode_exit(ln);
661err_shost_put:
662 scsi_host_put(shost);
663err:
664 return NULL;
665}
666
667/**
668 * csio_shost_exit - De-instantiate the shost.
669 * @ln: The lnode module corresponding to the shost.
670 *
671 */
672void
673csio_shost_exit(struct csio_lnode *ln)
674{
675 struct Scsi_Host *shost = csio_ln_to_shost(ln);
676 struct csio_hw *hw = csio_lnode_to_hw(ln);
677
678 /* Inform transport */
679 fc_remove_host(shost);
680
681 /* Inform SCSI ML */
682 scsi_remove_host(shost);
683
684 /* Flush all the events, so that any rnode removal events
685 * already queued are all handled, before we remove the lnode.
686 */
687 spin_lock_irq(&hw->lock);
688 csio_evtq_flush(hw);
689 spin_unlock_irq(&hw->lock);
690
691 csio_lnode_exit(ln);
692 scsi_host_put(shost);
693}
694
695struct csio_lnode *
696csio_lnode_alloc(struct csio_hw *hw)
697{
698 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
699}
700
701void
702csio_lnodes_block_request(struct csio_hw *hw)
703{
704 struct Scsi_Host *shost;
705 struct csio_lnode *sln;
706 struct csio_lnode *ln;
707 struct list_head *cur_ln, *cur_cln;
708 struct csio_lnode **lnode_list;
709 int cur_cnt = 0, ii;
710
711 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
712 GFP_KERNEL);
713 if (!lnode_list) {
714 csio_err(hw, "Failed to allocate lnodes_list");
715 return;
716 }
717
718 spin_lock_irq(&hw->lock);
719 /* Traverse sibling lnodes */
720 list_for_each(cur_ln, &hw->sln_head) {
721 sln = (struct csio_lnode *) cur_ln;
722 lnode_list[cur_cnt++] = sln;
723
724 /* Traverse children lnodes */
725 list_for_each(cur_cln, &sln->cln_head)
726 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
727 }
728 spin_unlock_irq(&hw->lock);
729
730 for (ii = 0; ii < cur_cnt; ii++) {
731 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
732 ln = lnode_list[ii];
733 shost = csio_ln_to_shost(ln);
734 scsi_block_requests(shost);
735
736 }
737 kfree(lnode_list);
738}
739
740void
741csio_lnodes_unblock_request(struct csio_hw *hw)
742{
743 struct csio_lnode *ln;
744 struct Scsi_Host *shost;
745 struct csio_lnode *sln;
746 struct list_head *cur_ln, *cur_cln;
747 struct csio_lnode **lnode_list;
748 int cur_cnt = 0, ii;
749
750 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
751 GFP_KERNEL);
752 if (!lnode_list) {
753 csio_err(hw, "Failed to allocate lnodes_list");
754 return;
755 }
756
757 spin_lock_irq(&hw->lock);
758 /* Traverse sibling lnodes */
759 list_for_each(cur_ln, &hw->sln_head) {
760 sln = (struct csio_lnode *) cur_ln;
761 lnode_list[cur_cnt++] = sln;
762
763 /* Traverse children lnodes */
764 list_for_each(cur_cln, &sln->cln_head)
765 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
766 }
767 spin_unlock_irq(&hw->lock);
768
769 for (ii = 0; ii < cur_cnt; ii++) {
770 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
771 ln = lnode_list[ii];
772 shost = csio_ln_to_shost(ln);
773 scsi_unblock_requests(shost);
774 }
775 kfree(lnode_list);
776}
777
778void
779csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
780{
781 struct csio_lnode *ln;
782 struct Scsi_Host *shost;
783 struct csio_lnode *sln;
784 struct list_head *cur_ln, *cur_cln;
785 struct csio_lnode **lnode_list;
786 int cur_cnt = 0, ii;
787
788 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
789 GFP_KERNEL);
790 if (!lnode_list) {
791 csio_err(hw, "Failed to allocate lnodes_list");
792 return;
793 }
794
795 spin_lock_irq(&hw->lock);
796 /* Traverse sibling lnodes */
797 list_for_each(cur_ln, &hw->sln_head) {
798 sln = (struct csio_lnode *) cur_ln;
799 if (sln->portid != portid)
800 continue;
801
802 lnode_list[cur_cnt++] = sln;
803
804 /* Traverse children lnodes */
805 list_for_each(cur_cln, &sln->cln_head)
806 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
807 }
808 spin_unlock_irq(&hw->lock);
809
810 for (ii = 0; ii < cur_cnt; ii++) {
811 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
812 ln = lnode_list[ii];
813 shost = csio_ln_to_shost(ln);
814 scsi_block_requests(shost);
815 }
816 kfree(lnode_list);
817}
818
819void
820csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
821{
822 struct csio_lnode *ln;
823 struct Scsi_Host *shost;
824 struct csio_lnode *sln;
825 struct list_head *cur_ln, *cur_cln;
826 struct csio_lnode **lnode_list;
827 int cur_cnt = 0, ii;
828
829 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
830 GFP_KERNEL);
831 if (!lnode_list) {
832 csio_err(hw, "Failed to allocate lnodes_list");
833 return;
834 }
835
836 spin_lock_irq(&hw->lock);
837 /* Traverse sibling lnodes */
838 list_for_each(cur_ln, &hw->sln_head) {
839 sln = (struct csio_lnode *) cur_ln;
840 if (sln->portid != portid)
841 continue;
842 lnode_list[cur_cnt++] = sln;
843
844 /* Traverse children lnodes */
845 list_for_each(cur_cln, &sln->cln_head)
846 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
847 }
848 spin_unlock_irq(&hw->lock);
849
850 for (ii = 0; ii < cur_cnt; ii++) {
851 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
852 ln = lnode_list[ii];
853 shost = csio_ln_to_shost(ln);
854 scsi_unblock_requests(shost);
855 }
856 kfree(lnode_list);
857}
858
859void
860csio_lnodes_exit(struct csio_hw *hw, bool npiv)
861{
862 struct csio_lnode *sln;
863 struct csio_lnode *ln;
864 struct list_head *cur_ln, *cur_cln;
865 struct csio_lnode **lnode_list;
866 int cur_cnt = 0, ii;
867
868 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
869 GFP_KERNEL);
870 if (!lnode_list) {
871 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
872 return;
873 }
874
875 /* Get all child lnodes(NPIV ports) */
876 spin_lock_irq(&hw->lock);
877 list_for_each(cur_ln, &hw->sln_head) {
878 sln = (struct csio_lnode *) cur_ln;
879
880 /* Traverse children lnodes */
881 list_for_each(cur_cln, &sln->cln_head)
882 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
883 }
884 spin_unlock_irq(&hw->lock);
885
886 /* Delete NPIV lnodes */
887 for (ii = 0; ii < cur_cnt; ii++) {
888 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
889 ln = lnode_list[ii];
890 fc_vport_terminate(ln->fc_vport);
891 }
892
893 /* Delete only npiv lnodes */
894 if (npiv)
895 goto free_lnodes;
896
897 cur_cnt = 0;
898 /* Get all physical lnodes */
899 spin_lock_irq(&hw->lock);
900 /* Traverse sibling lnodes */
901 list_for_each(cur_ln, &hw->sln_head) {
902 sln = (struct csio_lnode *) cur_ln;
903 lnode_list[cur_cnt++] = sln;
904 }
905 spin_unlock_irq(&hw->lock);
906
907 /* Delete physical lnodes */
908 for (ii = 0; ii < cur_cnt; ii++) {
909 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
910 csio_shost_exit(lnode_list[ii]);
911 }
912
913free_lnodes:
914 kfree(lnode_list);
915}
916
917/*
918 * csio_lnode_init_post: Set lnode attributes after starting HW.
919 * @ln: lnode.
920 *
921 */
922static void
923csio_lnode_init_post(struct csio_lnode *ln)
924{
925 struct Scsi_Host *shost = csio_ln_to_shost(ln);
926
927 csio_fchost_attr_init(ln);
928
929 scsi_scan_host(shost);
930}
931
932/*
933 * csio_probe_one - Instantiate this function.
934 * @pdev: PCI device
935 * @id: Device ID
936 *
937 * This is the .probe() callback of the driver. This function:
938 * - Initializes the PCI function by enabling MMIO, setting bus
939 * mastership and setting DMA mask.
940 * - Allocates HW structure, DMA, memory resources, maps BARS to
941 * host memory and initializes HW module.
942 * - Allocates lnode structure via scsi_host_alloc, initializes
943 * shost, initialized lnode module and registers with SCSI ML
944 * via scsi_host_add.
945 * - Enables interrupts, and starts the chip by kicking off the
946 * HW state machine.
947 * - Once hardware is ready, initiated scan of the host via
948 * scsi_scan_host.
949 */
950static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
951{
952 int rv;
953 int bars;
954 int i;
955 struct csio_hw *hw;
956 struct csio_lnode *ln;
957
958 rv = csio_pci_init(pdev, &bars);
959 if (rv)
960 goto err;
961
962 hw = csio_hw_alloc(pdev);
963 if (!hw) {
964 rv = -ENODEV;
965 goto err_pci_exit;
966 }
967
968 pci_set_drvdata(pdev, hw);
969
970 if (csio_hw_start(hw) != 0) {
971 dev_err(&pdev->dev,
972 "Failed to start FW, continuing in debug mode.\n");
973 return 0;
974 }
975
976 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
977 FW_HDR_FW_VER_MAJOR_GET(hw->fwrev),
978 FW_HDR_FW_VER_MINOR_GET(hw->fwrev),
979 FW_HDR_FW_VER_MICRO_GET(hw->fwrev),
980 FW_HDR_FW_VER_BUILD_GET(hw->fwrev));
981
982 for (i = 0; i < hw->num_pports; i++) {
983 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
984 if (!ln) {
985 rv = -ENODEV;
986 break;
987 }
988 /* Initialize portid */
989 ln->portid = hw->pport[i].portid;
990
991 spin_lock_irq(&hw->lock);
992 if (csio_lnode_start(ln) != 0)
993 rv = -ENODEV;
994 spin_unlock_irq(&hw->lock);
995
996 if (rv)
997 break;
998
999 csio_lnode_init_post(ln);
1000 }
1001
1002 if (rv)
1003 goto err_lnode_exit;
1004
1005 return 0;
1006
1007err_lnode_exit:
1008 csio_lnodes_block_request(hw);
1009 spin_lock_irq(&hw->lock);
1010 csio_hw_stop(hw);
1011 spin_unlock_irq(&hw->lock);
1012 csio_lnodes_unblock_request(hw);
1013 csio_lnodes_exit(hw, 0);
1014 csio_hw_free(hw);
1015err_pci_exit:
1016 csio_pci_exit(pdev, &bars);
1017err:
1018 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1019 return rv;
1020}
1021
1022/*
1023 * csio_remove_one - Remove one instance of the driver at this PCI function.
1024 * @pdev: PCI device
1025 *
1026 * Used during hotplug operation.
1027 */
1028static void csio_remove_one(struct pci_dev *pdev)
1029{
1030 struct csio_hw *hw = pci_get_drvdata(pdev);
1031 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1032
1033 csio_lnodes_block_request(hw);
1034 spin_lock_irq(&hw->lock);
1035
1036 /* Stops lnode, Rnode s/m
1037 * Quiesce IOs.
1038 * All sessions with remote ports are unregistered.
1039 */
1040 csio_hw_stop(hw);
1041 spin_unlock_irq(&hw->lock);
1042 csio_lnodes_unblock_request(hw);
1043
1044 csio_lnodes_exit(hw, 0);
1045 csio_hw_free(hw);
1046 csio_pci_exit(pdev, &bars);
1047}
1048
1049/*
1050 * csio_pci_error_detected - PCI error was detected
1051 * @pdev: PCI device
1052 *
1053 */
1054static pci_ers_result_t
1055csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1056{
1057 struct csio_hw *hw = pci_get_drvdata(pdev);
1058
1059 csio_lnodes_block_request(hw);
1060 spin_lock_irq(&hw->lock);
1061
1062 /* Post PCI error detected evt to HW s/m
1063 * HW s/m handles this evt by quiescing IOs, unregisters rports
1064 * and finally takes the device to offline.
1065 */
1066 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1067 spin_unlock_irq(&hw->lock);
1068 csio_lnodes_unblock_request(hw);
1069 csio_lnodes_exit(hw, 0);
1070 csio_intr_disable(hw, true);
1071 pci_disable_device(pdev);
1072 return state == pci_channel_io_perm_failure ?
1073 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1074}
1075
1076/*
1077 * csio_pci_slot_reset - PCI slot has been reset.
1078 * @pdev: PCI device
1079 *
1080 */
1081static pci_ers_result_t
1082csio_pci_slot_reset(struct pci_dev *pdev)
1083{
1084 struct csio_hw *hw = pci_get_drvdata(pdev);
1085 int ready;
1086
1087 if (pci_enable_device(pdev)) {
1088 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1089 return PCI_ERS_RESULT_DISCONNECT;
1090 }
1091
1092 pci_set_master(pdev);
1093 pci_restore_state(pdev);
1094 pci_save_state(pdev);
1095 pci_cleanup_aer_uncorrect_error_status(pdev);
1096
1097 /* Bring HW s/m to ready state.
1098 * but don't resume IOs.
1099 */
1100 spin_lock_irq(&hw->lock);
1101 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1102 ready = csio_is_hw_ready(hw);
1103 spin_unlock_irq(&hw->lock);
1104
1105 if (ready) {
1106 return PCI_ERS_RESULT_RECOVERED;
1107 } else {
1108 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1109 return PCI_ERS_RESULT_DISCONNECT;
1110 }
1111}
1112
1113/*
1114 * csio_pci_resume - Resume normal operations
1115 * @pdev: PCI device
1116 *
1117 */
1118static void
1119csio_pci_resume(struct pci_dev *pdev)
1120{
1121 struct csio_hw *hw = pci_get_drvdata(pdev);
1122 struct csio_lnode *ln;
1123 int rv = 0;
1124 int i;
1125
1126 /* Bring the LINK UP and Resume IO */
1127
1128 for (i = 0; i < hw->num_pports; i++) {
1129 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1130 if (!ln) {
1131 rv = -ENODEV;
1132 break;
1133 }
1134 /* Initialize portid */
1135 ln->portid = hw->pport[i].portid;
1136
1137 spin_lock_irq(&hw->lock);
1138 if (csio_lnode_start(ln) != 0)
1139 rv = -ENODEV;
1140 spin_unlock_irq(&hw->lock);
1141
1142 if (rv)
1143 break;
1144
1145 csio_lnode_init_post(ln);
1146 }
1147
1148 if (rv)
1149 goto err_resume_exit;
1150
1151 return;
1152
1153err_resume_exit:
1154 csio_lnodes_block_request(hw);
1155 spin_lock_irq(&hw->lock);
1156 csio_hw_stop(hw);
1157 spin_unlock_irq(&hw->lock);
1158 csio_lnodes_unblock_request(hw);
1159 csio_lnodes_exit(hw, 0);
1160 csio_hw_free(hw);
1161 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1162}
1163
1164static struct pci_error_handlers csio_err_handler = {
1165 .error_detected = csio_pci_error_detected,
1166 .slot_reset = csio_pci_slot_reset,
1167 .resume = csio_pci_resume,
1168};
1169
1170static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = {
1171 CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T4 DEBUG FCOE */
1172 CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */
1173 CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */
1174 CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */
1175 CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */
1176 CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */
1177 CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */
1178 CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */
1179 CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */
1180 CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */
1181 CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */
1182 CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */
1183 CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */
1184 CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */
1185 CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */
1186 CSIO_DEVICE(CSIO_DEVID_AMSTERDAM_T4_FCOE, 0), /* AMSTERDAM T4 FCOE */
1187 CSIO_DEVICE(CSIO_DEVID_HUAWEI_T480_FCOE, 0), /* HUAWEI T480 FCOE */
1188 CSIO_DEVICE(CSIO_DEVID_HUAWEI_T440_FCOE, 0), /* HUAWEI T440 FCOE */
1189 CSIO_DEVICE(CSIO_DEVID_HUAWEI_STG310_FCOE, 0), /* HUAWEI STG FCOE */
1190 CSIO_DEVICE(CSIO_DEVID_ACROMAG_XMC_XAUI, 0), /* ACROMAG XAUI FCOE */
1191 CSIO_DEVICE(CSIO_DEVID_QUANTA_MEZZ_SFP_FCOE, 0),/* QUANTA MEZZ FCOE */
1192 CSIO_DEVICE(CSIO_DEVID_HUAWEI_10GT_FCOE, 0), /* HUAWEI 10GT FCOE */
1193 CSIO_DEVICE(CSIO_DEVID_HUAWEI_T440_TOE_FCOE, 0),/* HUAWEI T4 TOE FCOE */
1194 CSIO_DEVICE(CSIO_DEVID_T580DBG_FCOE, 0), /* T5 DEBUG FCOE */
1195 CSIO_DEVICE(CSIO_DEVID_T520CR_FCOE, 0), /* T520CR FCOE */
1196 CSIO_DEVICE(CSIO_DEVID_T522CR_FCOE, 0), /* T522CR FCOE */
1197 CSIO_DEVICE(CSIO_DEVID_T540CR_FCOE, 0), /* T540CR FCOE */
1198 CSIO_DEVICE(CSIO_DEVID_T520BCH_FCOE, 0), /* T520BCH FCOE */
1199 CSIO_DEVICE(CSIO_DEVID_T540BCH_FCOE, 0), /* T540BCH FCOE */
1200 CSIO_DEVICE(CSIO_DEVID_T540CH_FCOE, 0), /* T540CH FCOE */
1201 CSIO_DEVICE(CSIO_DEVID_T520SO_FCOE, 0), /* T520SO FCOE */
1202 CSIO_DEVICE(CSIO_DEVID_T520CX_FCOE, 0), /* T520CX FCOE */
1203 CSIO_DEVICE(CSIO_DEVID_T520BT_FCOE, 0), /* T520BT FCOE */
1204 CSIO_DEVICE(CSIO_DEVID_T504BT_FCOE, 0), /* T504BT FCOE */
1205 CSIO_DEVICE(CSIO_DEVID_B520_FCOE, 0), /* B520 FCOE */
1206 CSIO_DEVICE(CSIO_DEVID_B504_FCOE, 0), /* B504 FCOE */
1207 CSIO_DEVICE(CSIO_DEVID_T580CR2_FCOE, 0), /* T580 CR FCOE */
1208 CSIO_DEVICE(CSIO_DEVID_T540LPCR_FCOE, 0), /* T540 LP-CR FCOE */
1209 CSIO_DEVICE(CSIO_DEVID_AMSTERDAM_T5_FCOE, 0), /* AMSTERDAM T5 FCOE */
1210 CSIO_DEVICE(CSIO_DEVID_T580LPCR_FCOE, 0), /* T580 LP-CR FCOE */
1211 CSIO_DEVICE(CSIO_DEVID_T520LLCR_FCOE, 0), /* T520 LL-CR FCOE */
1212 CSIO_DEVICE(CSIO_DEVID_T560CR_FCOE, 0), /* T560 CR FCOE */
1213 CSIO_DEVICE(CSIO_DEVID_T580CR_FCOE, 0), /* T580 CR FCOE */
1214 { 0, 0, 0, 0, 0, 0, 0 }
1215};
1216
1217
1218static struct pci_driver csio_pci_driver = {
1219 .name = KBUILD_MODNAME,
1220 .driver = {
1221 .owner = THIS_MODULE,
1222 },
1223 .id_table = csio_pci_tbl,
1224 .probe = csio_probe_one,
1225 .remove = csio_remove_one,
1226 .err_handler = &csio_err_handler,
1227};
1228
1229/*
1230 * csio_init - Chelsio storage driver initialization function.
1231 *
1232 */
1233static int __init
1234csio_init(void)
1235{
1236 int rv = -ENOMEM;
1237
1238 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1239
1240 csio_dfs_init();
1241
1242 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1243 if (!csio_fcoe_transport)
1244 goto err;
1245
1246 csio_fcoe_transport_vport =
1247 fc_attach_transport(&csio_fc_transport_vport_funcs);
1248 if (!csio_fcoe_transport_vport)
1249 goto err_vport;
1250
1251 rv = pci_register_driver(&csio_pci_driver);
1252 if (rv)
1253 goto err_pci;
1254
1255 return 0;
1256
1257err_pci:
1258 fc_release_transport(csio_fcoe_transport_vport);
1259err_vport:
1260 fc_release_transport(csio_fcoe_transport);
1261err:
1262 csio_dfs_exit();
1263 return rv;
1264}
1265
1266/*
1267 * csio_exit - Chelsio storage driver uninitialization .
1268 *
1269 * Function that gets called in the unload path.
1270 */
1271static void __exit
1272csio_exit(void)
1273{
1274 pci_unregister_driver(&csio_pci_driver);
1275 csio_dfs_exit();
1276 fc_release_transport(csio_fcoe_transport_vport);
1277 fc_release_transport(csio_fcoe_transport);
1278}
1279
1280module_init(csio_init);
1281module_exit(csio_exit);
1282MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1283MODULE_DESCRIPTION(CSIO_DRV_DESC);
1284MODULE_LICENSE(CSIO_DRV_LICENSE);
1285MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1286MODULE_VERSION(CSIO_DRV_VERSION);
1287MODULE_FIRMWARE(FW_FNAME_T4);
1288MODULE_FIRMWARE(FW_FNAME_T5);