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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/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 debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root,
117 (void *)hw + idx, &csio_mem_debugfs_fops,
118 size_mb << 20);
119}
120
121static int csio_setup_debugfs(struct csio_hw *hw)
122{
123 int i;
124
125 if (IS_ERR_OR_NULL(hw->debugfs_root))
126 return -1;
127
128 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A);
129 if (i & EDRAM0_ENABLE_F)
130 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
131 if (i & EDRAM1_ENABLE_F)
132 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
133
134 hw->chip_ops->chip_dfs_create_ext_mem(hw);
135 return 0;
136}
137
138/*
139 * csio_dfs_create - Creates and sets up per-hw debugfs.
140 *
141 */
142static int
143csio_dfs_create(struct csio_hw *hw)
144{
145 if (csio_debugfs_root) {
146 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
147 csio_debugfs_root);
148 csio_setup_debugfs(hw);
149 }
150
151 return 0;
152}
153
154/*
155 * csio_dfs_destroy - Destroys per-hw debugfs.
156 */
157static int
158csio_dfs_destroy(struct csio_hw *hw)
159{
160 if (hw->debugfs_root)
161 debugfs_remove_recursive(hw->debugfs_root);
162
163 return 0;
164}
165
166/*
167 * csio_dfs_init - Debug filesystem initialization for the module.
168 *
169 */
170static int
171csio_dfs_init(void)
172{
173 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
174 if (!csio_debugfs_root)
175 pr_warn("Could not create debugfs entry, continuing\n");
176
177 return 0;
178}
179
180/*
181 * csio_dfs_exit - debugfs cleanup for the module.
182 */
183static void
184csio_dfs_exit(void)
185{
186 debugfs_remove(csio_debugfs_root);
187}
188
189/*
190 * csio_pci_init - PCI initialization.
191 * @pdev: PCI device.
192 * @bars: Bitmask of bars to be requested.
193 *
194 * Initializes the PCI function by enabling MMIO, setting bus
195 * mastership and setting DMA mask.
196 */
197static int
198csio_pci_init(struct pci_dev *pdev, int *bars)
199{
200 int rv = -ENODEV;
201
202 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
203
204 if (pci_enable_device_mem(pdev))
205 goto err;
206
207 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
208 goto err_disable_device;
209
210 pci_set_master(pdev);
211 pci_try_set_mwi(pdev);
212
213 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
214 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
215 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
216 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
217 } else {
218 dev_err(&pdev->dev, "No suitable DMA available.\n");
219 goto err_release_regions;
220 }
221
222 return 0;
223
224err_release_regions:
225 pci_release_selected_regions(pdev, *bars);
226err_disable_device:
227 pci_disable_device(pdev);
228err:
229 return rv;
230
231}
232
233/*
234 * csio_pci_exit - PCI unitialization.
235 * @pdev: PCI device.
236 * @bars: Bars to be released.
237 *
238 */
239static void
240csio_pci_exit(struct pci_dev *pdev, int *bars)
241{
242 pci_release_selected_regions(pdev, *bars);
243 pci_disable_device(pdev);
244}
245
246/*
247 * csio_hw_init_workers - Initialize the HW module's worker threads.
248 * @hw: HW module.
249 *
250 */
251static void
252csio_hw_init_workers(struct csio_hw *hw)
253{
254 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
255}
256
257static void
258csio_hw_exit_workers(struct csio_hw *hw)
259{
260 cancel_work_sync(&hw->evtq_work);
261 flush_scheduled_work();
262}
263
264static int
265csio_create_queues(struct csio_hw *hw)
266{
267 int i, j;
268 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
269 int rv;
270 struct csio_scsi_cpu_info *info;
271
272 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
273 return 0;
274
275 if (hw->intr_mode != CSIO_IM_MSIX) {
276 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
277 0, hw->pport[0].portid, false, NULL);
278 if (rv != 0) {
279 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
280 return rv;
281 }
282 }
283
284 /* FW event queue */
285 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
286 csio_get_fwevt_intr_idx(hw),
287 hw->pport[0].portid, true, NULL);
288 if (rv != 0) {
289 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
290 return rv;
291 }
292
293 /* Create mgmt queue */
294 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
295 mgmtm->iq_idx, hw->pport[0].portid, NULL);
296
297 if (rv != 0) {
298 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
299 goto err;
300 }
301
302 /* Create SCSI queues */
303 for (i = 0; i < hw->num_pports; i++) {
304 info = &hw->scsi_cpu_info[i];
305
306 for (j = 0; j < info->max_cpus; j++) {
307 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
308
309 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
310 sqset->intr_idx, i, false, NULL);
311 if (rv != 0) {
312 csio_err(hw,
313 "SCSI module IQ config failed [%d][%d]:%d\n",
314 i, j, rv);
315 goto err;
316 }
317 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
318 sqset->iq_idx, i, NULL);
319 if (rv != 0) {
320 csio_err(hw,
321 "SCSI module EQ config failed [%d][%d]:%d\n",
322 i, j, rv);
323 goto err;
324 }
325 } /* for all CPUs */
326 } /* For all ports */
327
328 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
329 return 0;
330err:
331 csio_wr_destroy_queues(hw, true);
332 return -EINVAL;
333}
334
335/*
336 * csio_config_queues - Configure the DMA queues.
337 * @hw: HW module.
338 *
339 * Allocates memory for queues are registers them with FW.
340 */
341int
342csio_config_queues(struct csio_hw *hw)
343{
344 int i, j, idx, k = 0;
345 int rv;
346 struct csio_scsi_qset *sqset;
347 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
348 struct csio_scsi_qset *orig;
349 struct csio_scsi_cpu_info *info;
350
351 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
352 return csio_create_queues(hw);
353
354 /* Calculate number of SCSI queues for MSIX we would like */
355 hw->num_scsi_msix_cpus = num_online_cpus();
356 hw->num_sqsets = num_online_cpus() * hw->num_pports;
357
358 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
359 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
360 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
361 }
362
363 /* Initialize max_cpus, may get reduced during msix allocations */
364 for (i = 0; i < hw->num_pports; i++)
365 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
366
367 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
368 hw->num_sqsets, hw->num_scsi_msix_cpus);
369
370 csio_intr_enable(hw);
371
372 if (hw->intr_mode != CSIO_IM_MSIX) {
373
374 /* Allocate Forward interrupt iq. */
375 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
376 CSIO_INTR_WRSIZE, CSIO_INGRESS,
377 (void *)hw, 0, 0, NULL);
378 if (hw->intr_iq_idx == -1) {
379 csio_err(hw,
380 "Forward interrupt queue creation failed\n");
381 goto intr_disable;
382 }
383 }
384
385 /* Allocate the FW evt queue */
386 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
387 CSIO_FWEVT_WRSIZE,
388 CSIO_INGRESS, (void *)hw,
389 CSIO_FWEVT_FLBUFS, 0,
390 csio_fwevt_intx_handler);
391 if (hw->fwevt_iq_idx == -1) {
392 csio_err(hw, "FW evt queue creation failed\n");
393 goto intr_disable;
394 }
395
396 /* Allocate the mgmt queue */
397 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
398 CSIO_MGMT_EQ_WRSIZE,
399 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
400 if (mgmtm->eq_idx == -1) {
401 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
402 goto intr_disable;
403 }
404
405 /* Use FW IQ for MGMT req completion */
406 mgmtm->iq_idx = hw->fwevt_iq_idx;
407
408 /* Allocate SCSI queues */
409 for (i = 0; i < hw->num_pports; i++) {
410 info = &hw->scsi_cpu_info[i];
411
412 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
413 sqset = &hw->sqset[i][j];
414
415 if (j >= info->max_cpus) {
416 k = j % info->max_cpus;
417 orig = &hw->sqset[i][k];
418 sqset->eq_idx = orig->eq_idx;
419 sqset->iq_idx = orig->iq_idx;
420 continue;
421 }
422
423 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
424 CSIO_EGRESS, (void *)hw, 0, 0,
425 NULL);
426 if (idx == -1) {
427 csio_err(hw, "EQ creation failed for idx:%d\n",
428 idx);
429 goto intr_disable;
430 }
431
432 sqset->eq_idx = idx;
433
434 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
435 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
436 (void *)hw, 0, 0,
437 csio_scsi_intx_handler);
438 if (idx == -1) {
439 csio_err(hw, "IQ creation failed for idx:%d\n",
440 idx);
441 goto intr_disable;
442 }
443 sqset->iq_idx = idx;
444 } /* for all CPUs */
445 } /* For all ports */
446
447 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
448
449 rv = csio_create_queues(hw);
450 if (rv != 0)
451 goto intr_disable;
452
453 /*
454 * Now request IRQs for the vectors. In the event of a failure,
455 * cleanup is handled internally by this function.
456 */
457 rv = csio_request_irqs(hw);
458 if (rv != 0)
459 return -EINVAL;
460
461 return 0;
462
463intr_disable:
464 csio_intr_disable(hw, false);
465
466 return -EINVAL;
467}
468
469static int
470csio_resource_alloc(struct csio_hw *hw)
471{
472 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
473 int rv = -ENOMEM;
474
475 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
476 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
477
478 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
479 sizeof(struct csio_mb));
480 if (!hw->mb_mempool)
481 goto err;
482
483 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
484 sizeof(struct csio_rnode));
485 if (!hw->rnode_mempool)
486 goto err_free_mb_mempool;
487
488 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev,
489 CSIO_SCSI_RSP_LEN, 8, 0);
490 if (!hw->scsi_pci_pool)
491 goto err_free_rn_pool;
492
493 return 0;
494
495err_free_rn_pool:
496 mempool_destroy(hw->rnode_mempool);
497 hw->rnode_mempool = NULL;
498err_free_mb_mempool:
499 mempool_destroy(hw->mb_mempool);
500 hw->mb_mempool = NULL;
501err:
502 return rv;
503}
504
505static void
506csio_resource_free(struct csio_hw *hw)
507{
508 pci_pool_destroy(hw->scsi_pci_pool);
509 hw->scsi_pci_pool = NULL;
510 mempool_destroy(hw->rnode_mempool);
511 hw->rnode_mempool = NULL;
512 mempool_destroy(hw->mb_mempool);
513 hw->mb_mempool = NULL;
514}
515
516/*
517 * csio_hw_alloc - Allocate and initialize the HW module.
518 * @pdev: PCI device.
519 *
520 * Allocates HW structure, DMA, memory resources, maps BARS to
521 * host memory and initializes HW module.
522 */
523static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
524{
525 struct csio_hw *hw;
526
527 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
528 if (!hw)
529 goto err;
530
531 hw->pdev = pdev;
532 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
533
534 /* memory pool/DMA pool allocation */
535 if (csio_resource_alloc(hw))
536 goto err_free_hw;
537
538 /* Get the start address of registers from BAR 0 */
539 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
540 pci_resource_len(pdev, 0));
541 if (!hw->regstart) {
542 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
543 hw->regstart);
544 goto err_resource_free;
545 }
546
547 csio_hw_init_workers(hw);
548
549 if (csio_hw_init(hw))
550 goto err_unmap_bar;
551
552 csio_dfs_create(hw);
553
554 csio_dbg(hw, "hw:%p\n", hw);
555
556 return hw;
557
558err_unmap_bar:
559 csio_hw_exit_workers(hw);
560 iounmap(hw->regstart);
561err_resource_free:
562 csio_resource_free(hw);
563err_free_hw:
564 kfree(hw);
565err:
566 return NULL;
567}
568
569/*
570 * csio_hw_free - Uninitialize and free the HW module.
571 * @hw: The HW module
572 *
573 * Disable interrupts, uninit the HW module, free resources, free hw.
574 */
575static void
576csio_hw_free(struct csio_hw *hw)
577{
578 csio_intr_disable(hw, true);
579 csio_hw_exit_workers(hw);
580 csio_hw_exit(hw);
581 iounmap(hw->regstart);
582 csio_dfs_destroy(hw);
583 csio_resource_free(hw);
584 kfree(hw);
585}
586
587/**
588 * csio_shost_init - Create and initialize the lnode module.
589 * @hw: The HW module.
590 * @dev: The device associated with this invocation.
591 * @probe: Called from probe context or not?
592 * @os_pln: Parent lnode if any.
593 *
594 * Allocates lnode structure via scsi_host_alloc, initializes
595 * shost, initializes lnode module and registers with SCSI ML
596 * via scsi_host_add. This function is shared between physical and
597 * virtual node ports.
598 */
599struct csio_lnode *
600csio_shost_init(struct csio_hw *hw, struct device *dev,
601 bool probe, struct csio_lnode *pln)
602{
603 struct Scsi_Host *shost = NULL;
604 struct csio_lnode *ln;
605
606 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
607 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
608
609 /*
610 * hw->pdev is the physical port's PCI dev structure,
611 * which will be different from the NPIV dev structure.
612 */
613 if (dev == &hw->pdev->dev)
614 shost = scsi_host_alloc(
615 &csio_fcoe_shost_template,
616 sizeof(struct csio_lnode));
617 else
618 shost = scsi_host_alloc(
619 &csio_fcoe_shost_vport_template,
620 sizeof(struct csio_lnode));
621
622 if (!shost)
623 goto err;
624
625 ln = shost_priv(shost);
626 memset(ln, 0, sizeof(struct csio_lnode));
627
628 /* Link common lnode to this lnode */
629 ln->dev_num = (shost->host_no << 16);
630
631 shost->can_queue = CSIO_MAX_QUEUE;
632 shost->this_id = -1;
633 shost->unique_id = shost->host_no;
634 shost->max_cmd_len = 16; /* Max CDB length supported */
635 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
636 hw->fres_info.max_ssns);
637 shost->max_lun = CSIO_MAX_LUN;
638 if (dev == &hw->pdev->dev)
639 shost->transportt = csio_fcoe_transport;
640 else
641 shost->transportt = csio_fcoe_transport_vport;
642
643 /* root lnode */
644 if (!hw->rln)
645 hw->rln = ln;
646
647 /* Other initialization here: Common, Transport specific */
648 if (csio_lnode_init(ln, hw, pln))
649 goto err_shost_put;
650
651 if (scsi_add_host(shost, dev))
652 goto err_lnode_exit;
653
654 return ln;
655
656err_lnode_exit:
657 csio_lnode_exit(ln);
658err_shost_put:
659 scsi_host_put(shost);
660err:
661 return NULL;
662}
663
664/**
665 * csio_shost_exit - De-instantiate the shost.
666 * @ln: The lnode module corresponding to the shost.
667 *
668 */
669void
670csio_shost_exit(struct csio_lnode *ln)
671{
672 struct Scsi_Host *shost = csio_ln_to_shost(ln);
673 struct csio_hw *hw = csio_lnode_to_hw(ln);
674
675 /* Inform transport */
676 fc_remove_host(shost);
677
678 /* Inform SCSI ML */
679 scsi_remove_host(shost);
680
681 /* Flush all the events, so that any rnode removal events
682 * already queued are all handled, before we remove the lnode.
683 */
684 spin_lock_irq(&hw->lock);
685 csio_evtq_flush(hw);
686 spin_unlock_irq(&hw->lock);
687
688 csio_lnode_exit(ln);
689 scsi_host_put(shost);
690}
691
692struct csio_lnode *
693csio_lnode_alloc(struct csio_hw *hw)
694{
695 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
696}
697
698void
699csio_lnodes_block_request(struct csio_hw *hw)
700{
701 struct Scsi_Host *shost;
702 struct csio_lnode *sln;
703 struct csio_lnode *ln;
704 struct list_head *cur_ln, *cur_cln;
705 struct csio_lnode **lnode_list;
706 int cur_cnt = 0, ii;
707
708 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
709 GFP_KERNEL);
710 if (!lnode_list) {
711 csio_err(hw, "Failed to allocate lnodes_list");
712 return;
713 }
714
715 spin_lock_irq(&hw->lock);
716 /* Traverse sibling lnodes */
717 list_for_each(cur_ln, &hw->sln_head) {
718 sln = (struct csio_lnode *) cur_ln;
719 lnode_list[cur_cnt++] = sln;
720
721 /* Traverse children lnodes */
722 list_for_each(cur_cln, &sln->cln_head)
723 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
724 }
725 spin_unlock_irq(&hw->lock);
726
727 for (ii = 0; ii < cur_cnt; ii++) {
728 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
729 ln = lnode_list[ii];
730 shost = csio_ln_to_shost(ln);
731 scsi_block_requests(shost);
732
733 }
734 kfree(lnode_list);
735}
736
737void
738csio_lnodes_unblock_request(struct csio_hw *hw)
739{
740 struct csio_lnode *ln;
741 struct Scsi_Host *shost;
742 struct csio_lnode *sln;
743 struct list_head *cur_ln, *cur_cln;
744 struct csio_lnode **lnode_list;
745 int cur_cnt = 0, ii;
746
747 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
748 GFP_KERNEL);
749 if (!lnode_list) {
750 csio_err(hw, "Failed to allocate lnodes_list");
751 return;
752 }
753
754 spin_lock_irq(&hw->lock);
755 /* Traverse sibling lnodes */
756 list_for_each(cur_ln, &hw->sln_head) {
757 sln = (struct csio_lnode *) cur_ln;
758 lnode_list[cur_cnt++] = sln;
759
760 /* Traverse children lnodes */
761 list_for_each(cur_cln, &sln->cln_head)
762 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
763 }
764 spin_unlock_irq(&hw->lock);
765
766 for (ii = 0; ii < cur_cnt; ii++) {
767 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
768 ln = lnode_list[ii];
769 shost = csio_ln_to_shost(ln);
770 scsi_unblock_requests(shost);
771 }
772 kfree(lnode_list);
773}
774
775void
776csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
777{
778 struct csio_lnode *ln;
779 struct Scsi_Host *shost;
780 struct csio_lnode *sln;
781 struct list_head *cur_ln, *cur_cln;
782 struct csio_lnode **lnode_list;
783 int cur_cnt = 0, ii;
784
785 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
786 GFP_KERNEL);
787 if (!lnode_list) {
788 csio_err(hw, "Failed to allocate lnodes_list");
789 return;
790 }
791
792 spin_lock_irq(&hw->lock);
793 /* Traverse sibling lnodes */
794 list_for_each(cur_ln, &hw->sln_head) {
795 sln = (struct csio_lnode *) cur_ln;
796 if (sln->portid != portid)
797 continue;
798
799 lnode_list[cur_cnt++] = sln;
800
801 /* Traverse children lnodes */
802 list_for_each(cur_cln, &sln->cln_head)
803 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
804 }
805 spin_unlock_irq(&hw->lock);
806
807 for (ii = 0; ii < cur_cnt; ii++) {
808 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
809 ln = lnode_list[ii];
810 shost = csio_ln_to_shost(ln);
811 scsi_block_requests(shost);
812 }
813 kfree(lnode_list);
814}
815
816void
817csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
818{
819 struct csio_lnode *ln;
820 struct Scsi_Host *shost;
821 struct csio_lnode *sln;
822 struct list_head *cur_ln, *cur_cln;
823 struct csio_lnode **lnode_list;
824 int cur_cnt = 0, ii;
825
826 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
827 GFP_KERNEL);
828 if (!lnode_list) {
829 csio_err(hw, "Failed to allocate lnodes_list");
830 return;
831 }
832
833 spin_lock_irq(&hw->lock);
834 /* Traverse sibling lnodes */
835 list_for_each(cur_ln, &hw->sln_head) {
836 sln = (struct csio_lnode *) cur_ln;
837 if (sln->portid != portid)
838 continue;
839 lnode_list[cur_cnt++] = sln;
840
841 /* Traverse children lnodes */
842 list_for_each(cur_cln, &sln->cln_head)
843 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
844 }
845 spin_unlock_irq(&hw->lock);
846
847 for (ii = 0; ii < cur_cnt; ii++) {
848 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
849 ln = lnode_list[ii];
850 shost = csio_ln_to_shost(ln);
851 scsi_unblock_requests(shost);
852 }
853 kfree(lnode_list);
854}
855
856void
857csio_lnodes_exit(struct csio_hw *hw, bool npiv)
858{
859 struct csio_lnode *sln;
860 struct csio_lnode *ln;
861 struct list_head *cur_ln, *cur_cln;
862 struct csio_lnode **lnode_list;
863 int cur_cnt = 0, ii;
864
865 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
866 GFP_KERNEL);
867 if (!lnode_list) {
868 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
869 return;
870 }
871
872 /* Get all child lnodes(NPIV ports) */
873 spin_lock_irq(&hw->lock);
874 list_for_each(cur_ln, &hw->sln_head) {
875 sln = (struct csio_lnode *) cur_ln;
876
877 /* Traverse children lnodes */
878 list_for_each(cur_cln, &sln->cln_head)
879 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
880 }
881 spin_unlock_irq(&hw->lock);
882
883 /* Delete NPIV lnodes */
884 for (ii = 0; ii < cur_cnt; ii++) {
885 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
886 ln = lnode_list[ii];
887 fc_vport_terminate(ln->fc_vport);
888 }
889
890 /* Delete only npiv lnodes */
891 if (npiv)
892 goto free_lnodes;
893
894 cur_cnt = 0;
895 /* Get all physical lnodes */
896 spin_lock_irq(&hw->lock);
897 /* Traverse sibling lnodes */
898 list_for_each(cur_ln, &hw->sln_head) {
899 sln = (struct csio_lnode *) cur_ln;
900 lnode_list[cur_cnt++] = sln;
901 }
902 spin_unlock_irq(&hw->lock);
903
904 /* Delete physical lnodes */
905 for (ii = 0; ii < cur_cnt; ii++) {
906 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
907 csio_shost_exit(lnode_list[ii]);
908 }
909
910free_lnodes:
911 kfree(lnode_list);
912}
913
914/*
915 * csio_lnode_init_post: Set lnode attributes after starting HW.
916 * @ln: lnode.
917 *
918 */
919static void
920csio_lnode_init_post(struct csio_lnode *ln)
921{
922 struct Scsi_Host *shost = csio_ln_to_shost(ln);
923
924 csio_fchost_attr_init(ln);
925
926 scsi_scan_host(shost);
927}
928
929/*
930 * csio_probe_one - Instantiate this function.
931 * @pdev: PCI device
932 * @id: Device ID
933 *
934 * This is the .probe() callback of the driver. This function:
935 * - Initializes the PCI function by enabling MMIO, setting bus
936 * mastership and setting DMA mask.
937 * - Allocates HW structure, DMA, memory resources, maps BARS to
938 * host memory and initializes HW module.
939 * - Allocates lnode structure via scsi_host_alloc, initializes
940 * shost, initialized lnode module and registers with SCSI ML
941 * via scsi_host_add.
942 * - Enables interrupts, and starts the chip by kicking off the
943 * HW state machine.
944 * - Once hardware is ready, initiated scan of the host via
945 * scsi_scan_host.
946 */
947static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
948{
949 int rv;
950 int bars;
951 int i;
952 struct csio_hw *hw;
953 struct csio_lnode *ln;
954
955 /* probe only T5 cards */
956 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)))
957 return -ENODEV;
958
959 rv = csio_pci_init(pdev, &bars);
960 if (rv)
961 goto err;
962
963 hw = csio_hw_alloc(pdev);
964 if (!hw) {
965 rv = -ENODEV;
966 goto err_pci_exit;
967 }
968
969 pci_set_drvdata(pdev, hw);
970
971 if (csio_hw_start(hw) != 0) {
972 dev_err(&pdev->dev,
973 "Failed to start FW, continuing in debug mode.\n");
974 return 0;
975 }
976
977 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
978 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
979 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
980 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
981 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
982
983 for (i = 0; i < hw->num_pports; i++) {
984 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
985 if (!ln) {
986 rv = -ENODEV;
987 break;
988 }
989 /* Initialize portid */
990 ln->portid = hw->pport[i].portid;
991
992 spin_lock_irq(&hw->lock);
993 if (csio_lnode_start(ln) != 0)
994 rv = -ENODEV;
995 spin_unlock_irq(&hw->lock);
996
997 if (rv)
998 break;
999
1000 csio_lnode_init_post(ln);
1001 }
1002
1003 if (rv)
1004 goto err_lnode_exit;
1005
1006 return 0;
1007
1008err_lnode_exit:
1009 csio_lnodes_block_request(hw);
1010 spin_lock_irq(&hw->lock);
1011 csio_hw_stop(hw);
1012 spin_unlock_irq(&hw->lock);
1013 csio_lnodes_unblock_request(hw);
1014 csio_lnodes_exit(hw, 0);
1015 csio_hw_free(hw);
1016err_pci_exit:
1017 csio_pci_exit(pdev, &bars);
1018err:
1019 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1020 return rv;
1021}
1022
1023/*
1024 * csio_remove_one - Remove one instance of the driver at this PCI function.
1025 * @pdev: PCI device
1026 *
1027 * Used during hotplug operation.
1028 */
1029static void csio_remove_one(struct pci_dev *pdev)
1030{
1031 struct csio_hw *hw = pci_get_drvdata(pdev);
1032 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1033
1034 csio_lnodes_block_request(hw);
1035 spin_lock_irq(&hw->lock);
1036
1037 /* Stops lnode, Rnode s/m
1038 * Quiesce IOs.
1039 * All sessions with remote ports are unregistered.
1040 */
1041 csio_hw_stop(hw);
1042 spin_unlock_irq(&hw->lock);
1043 csio_lnodes_unblock_request(hw);
1044
1045 csio_lnodes_exit(hw, 0);
1046 csio_hw_free(hw);
1047 csio_pci_exit(pdev, &bars);
1048}
1049
1050/*
1051 * csio_pci_error_detected - PCI error was detected
1052 * @pdev: PCI device
1053 *
1054 */
1055static pci_ers_result_t
1056csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1057{
1058 struct csio_hw *hw = pci_get_drvdata(pdev);
1059
1060 csio_lnodes_block_request(hw);
1061 spin_lock_irq(&hw->lock);
1062
1063 /* Post PCI error detected evt to HW s/m
1064 * HW s/m handles this evt by quiescing IOs, unregisters rports
1065 * and finally takes the device to offline.
1066 */
1067 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1068 spin_unlock_irq(&hw->lock);
1069 csio_lnodes_unblock_request(hw);
1070 csio_lnodes_exit(hw, 0);
1071 csio_intr_disable(hw, true);
1072 pci_disable_device(pdev);
1073 return state == pci_channel_io_perm_failure ?
1074 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1075}
1076
1077/*
1078 * csio_pci_slot_reset - PCI slot has been reset.
1079 * @pdev: PCI device
1080 *
1081 */
1082static pci_ers_result_t
1083csio_pci_slot_reset(struct pci_dev *pdev)
1084{
1085 struct csio_hw *hw = pci_get_drvdata(pdev);
1086 int ready;
1087
1088 if (pci_enable_device(pdev)) {
1089 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1090 return PCI_ERS_RESULT_DISCONNECT;
1091 }
1092
1093 pci_set_master(pdev);
1094 pci_restore_state(pdev);
1095 pci_save_state(pdev);
1096 pci_cleanup_aer_uncorrect_error_status(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(CSIO_DRV_LICENSE);
1253MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1254MODULE_VERSION(CSIO_DRV_VERSION);
1255MODULE_FIRMWARE(FW_FNAME_T5);