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Diffstat (limited to 'drivers/scsi/csiostor/csio_init.c')
-rw-r--r--drivers/scsi/csiostor/csio_init.c1274
1 files changed, 1274 insertions, 0 deletions
diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c
new file mode 100644
index 000000000000..fdd408ff80ad
--- /dev/null
+++ b/drivers/scsi/csiostor/csio_init.c
@@ -0,0 +1,1274 @@
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 int
64csio_mem_open(struct inode *inode, struct file *file)
65{
66 file->private_data = inode->i_private;
67 return 0;
68}
69
70static ssize_t
71csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
72{
73 loff_t pos = *ppos;
74 loff_t avail = file->f_path.dentry->d_inode->i_size;
75 unsigned int mem = (uintptr_t)file->private_data & 3;
76 struct csio_hw *hw = file->private_data - mem;
77
78 if (pos < 0)
79 return -EINVAL;
80 if (pos >= avail)
81 return 0;
82 if (count > avail - pos)
83 count = avail - pos;
84
85 while (count) {
86 size_t len;
87 int ret, ofst;
88 __be32 data[16];
89
90 if (mem == MEM_MC)
91 ret = csio_hw_mc_read(hw, pos, data, NULL);
92 else
93 ret = csio_hw_edc_read(hw, mem, pos, data, NULL);
94 if (ret)
95 return ret;
96
97 ofst = pos % sizeof(data);
98 len = min(count, sizeof(data) - ofst);
99 if (copy_to_user(buf, (u8 *)data + ofst, len))
100 return -EFAULT;
101
102 buf += len;
103 pos += len;
104 count -= len;
105 }
106 count = pos - *ppos;
107 *ppos = pos;
108 return count;
109}
110
111static const struct file_operations csio_mem_debugfs_fops = {
112 .owner = THIS_MODULE,
113 .open = csio_mem_open,
114 .read = csio_mem_read,
115 .llseek = default_llseek,
116};
117
118static void __devinit
119csio_add_debugfs_mem(struct csio_hw *hw, const char *name,
120 unsigned int idx, unsigned int size_mb)
121{
122 struct dentry *de;
123
124 de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root,
125 (void *)hw + idx, &csio_mem_debugfs_fops);
126 if (de && de->d_inode)
127 de->d_inode->i_size = size_mb << 20;
128}
129
130static int __devinit
131csio_setup_debugfs(struct csio_hw *hw)
132{
133 int i;
134
135 if (IS_ERR_OR_NULL(hw->debugfs_root))
136 return -1;
137
138 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE);
139 if (i & EDRAM0_ENABLE)
140 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
141 if (i & EDRAM1_ENABLE)
142 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
143 if (i & EXT_MEM_ENABLE)
144 csio_add_debugfs_mem(hw, "mc", MEM_MC,
145 EXT_MEM_SIZE_GET(csio_rd_reg32(hw, MA_EXT_MEMORY_BAR)));
146 return 0;
147}
148
149/*
150 * csio_dfs_create - Creates and sets up per-hw debugfs.
151 *
152 */
153static int
154csio_dfs_create(struct csio_hw *hw)
155{
156 if (csio_debugfs_root) {
157 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
158 csio_debugfs_root);
159 csio_setup_debugfs(hw);
160 }
161
162 return 0;
163}
164
165/*
166 * csio_dfs_destroy - Destroys per-hw debugfs.
167 */
168static int
169csio_dfs_destroy(struct csio_hw *hw)
170{
171 if (hw->debugfs_root)
172 debugfs_remove_recursive(hw->debugfs_root);
173
174 return 0;
175}
176
177/*
178 * csio_dfs_init - Debug filesystem initialization for the module.
179 *
180 */
181static int
182csio_dfs_init(void)
183{
184 csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
185 if (!csio_debugfs_root)
186 pr_warn("Could not create debugfs entry, continuing\n");
187
188 return 0;
189}
190
191/*
192 * csio_dfs_exit - debugfs cleanup for the module.
193 */
194static void
195csio_dfs_exit(void)
196{
197 debugfs_remove(csio_debugfs_root);
198}
199
200/*
201 * csio_pci_init - PCI initialization.
202 * @pdev: PCI device.
203 * @bars: Bitmask of bars to be requested.
204 *
205 * Initializes the PCI function by enabling MMIO, setting bus
206 * mastership and setting DMA mask.
207 */
208static int
209csio_pci_init(struct pci_dev *pdev, int *bars)
210{
211 int rv = -ENODEV;
212
213 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
214
215 if (pci_enable_device_mem(pdev))
216 goto err;
217
218 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
219 goto err_disable_device;
220
221 pci_set_master(pdev);
222 pci_try_set_mwi(pdev);
223
224 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
225 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
226 } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
227 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
228 } else {
229 dev_err(&pdev->dev, "No suitable DMA available.\n");
230 goto err_release_regions;
231 }
232
233 return 0;
234
235err_release_regions:
236 pci_release_selected_regions(pdev, *bars);
237err_disable_device:
238 pci_disable_device(pdev);
239err:
240 return rv;
241
242}
243
244/*
245 * csio_pci_exit - PCI unitialization.
246 * @pdev: PCI device.
247 * @bars: Bars to be released.
248 *
249 */
250static void
251csio_pci_exit(struct pci_dev *pdev, int *bars)
252{
253 pci_release_selected_regions(pdev, *bars);
254 pci_disable_device(pdev);
255}
256
257/*
258 * csio_hw_init_workers - Initialize the HW module's worker threads.
259 * @hw: HW module.
260 *
261 */
262static void
263csio_hw_init_workers(struct csio_hw *hw)
264{
265 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
266}
267
268static void
269csio_hw_exit_workers(struct csio_hw *hw)
270{
271 cancel_work_sync(&hw->evtq_work);
272 flush_scheduled_work();
273}
274
275static int
276csio_create_queues(struct csio_hw *hw)
277{
278 int i, j;
279 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
280 int rv;
281 struct csio_scsi_cpu_info *info;
282
283 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
284 return 0;
285
286 if (hw->intr_mode != CSIO_IM_MSIX) {
287 rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx,
288 0, hw->pport[0].portid, false, NULL);
289 if (rv != 0) {
290 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
291 return rv;
292 }
293 }
294
295 /* FW event queue */
296 rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx,
297 csio_get_fwevt_intr_idx(hw),
298 hw->pport[0].portid, true, NULL);
299 if (rv != 0) {
300 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
301 return rv;
302 }
303
304 /* Create mgmt queue */
305 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
306 mgmtm->iq_idx, hw->pport[0].portid, NULL);
307
308 if (rv != 0) {
309 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
310 goto err;
311 }
312
313 /* Create SCSI queues */
314 for (i = 0; i < hw->num_pports; i++) {
315 info = &hw->scsi_cpu_info[i];
316
317 for (j = 0; j < info->max_cpus; j++) {
318 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
319
320 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
321 sqset->intr_idx, i, false, NULL);
322 if (rv != 0) {
323 csio_err(hw,
324 "SCSI module IQ config failed [%d][%d]:%d\n",
325 i, j, rv);
326 goto err;
327 }
328 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
329 sqset->iq_idx, i, NULL);
330 if (rv != 0) {
331 csio_err(hw,
332 "SCSI module EQ config failed [%d][%d]:%d\n",
333 i, j, rv);
334 goto err;
335 }
336 } /* for all CPUs */
337 } /* For all ports */
338
339 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
340 return 0;
341err:
342 csio_wr_destroy_queues(hw, true);
343 return -EINVAL;
344}
345
346/*
347 * csio_config_queues - Configure the DMA queues.
348 * @hw: HW module.
349 *
350 * Allocates memory for queues are registers them with FW.
351 */
352int
353csio_config_queues(struct csio_hw *hw)
354{
355 int i, j, idx, k = 0;
356 int rv;
357 struct csio_scsi_qset *sqset;
358 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
359 struct csio_scsi_qset *orig;
360 struct csio_scsi_cpu_info *info;
361
362 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
363 return csio_create_queues(hw);
364
365 /* Calculate number of SCSI queues for MSIX we would like */
366 hw->num_scsi_msix_cpus = num_online_cpus();
367 hw->num_sqsets = num_online_cpus() * hw->num_pports;
368
369 if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) {
370 hw->num_sqsets = CSIO_MAX_SCSI_QSETS;
371 hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU;
372 }
373
374 /* Initialize max_cpus, may get reduced during msix allocations */
375 for (i = 0; i < hw->num_pports; i++)
376 hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus;
377
378 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
379 hw->num_sqsets, hw->num_scsi_msix_cpus);
380
381 csio_intr_enable(hw);
382
383 if (hw->intr_mode != CSIO_IM_MSIX) {
384
385 /* Allocate Forward interrupt iq. */
386 hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE,
387 CSIO_INTR_WRSIZE, CSIO_INGRESS,
388 (void *)hw, 0, 0, NULL);
389 if (hw->intr_iq_idx == -1) {
390 csio_err(hw,
391 "Forward interrupt queue creation failed\n");
392 goto intr_disable;
393 }
394 }
395
396 /* Allocate the FW evt queue */
397 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
398 CSIO_FWEVT_WRSIZE,
399 CSIO_INGRESS, (void *)hw,
400 CSIO_FWEVT_FLBUFS, 0,
401 csio_fwevt_intx_handler);
402 if (hw->fwevt_iq_idx == -1) {
403 csio_err(hw, "FW evt queue creation failed\n");
404 goto intr_disable;
405 }
406
407 /* Allocate the mgmt queue */
408 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
409 CSIO_MGMT_EQ_WRSIZE,
410 CSIO_EGRESS, (void *)hw, 0, 0, NULL);
411 if (mgmtm->eq_idx == -1) {
412 csio_err(hw, "Failed to alloc egress queue for mgmt module\n");
413 goto intr_disable;
414 }
415
416 /* Use FW IQ for MGMT req completion */
417 mgmtm->iq_idx = hw->fwevt_iq_idx;
418
419 /* Allocate SCSI queues */
420 for (i = 0; i < hw->num_pports; i++) {
421 info = &hw->scsi_cpu_info[i];
422
423 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
424 sqset = &hw->sqset[i][j];
425
426 if (j >= info->max_cpus) {
427 k = j % info->max_cpus;
428 orig = &hw->sqset[i][k];
429 sqset->eq_idx = orig->eq_idx;
430 sqset->iq_idx = orig->iq_idx;
431 continue;
432 }
433
434 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
435 CSIO_EGRESS, (void *)hw, 0, 0,
436 NULL);
437 if (idx == -1) {
438 csio_err(hw, "EQ creation failed for idx:%d\n",
439 idx);
440 goto intr_disable;
441 }
442
443 sqset->eq_idx = idx;
444
445 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
446 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
447 (void *)hw, 0, 0,
448 csio_scsi_intx_handler);
449 if (idx == -1) {
450 csio_err(hw, "IQ creation failed for idx:%d\n",
451 idx);
452 goto intr_disable;
453 }
454 sqset->iq_idx = idx;
455 } /* for all CPUs */
456 } /* For all ports */
457
458 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
459
460 rv = csio_create_queues(hw);
461 if (rv != 0)
462 goto intr_disable;
463
464 /*
465 * Now request IRQs for the vectors. In the event of a failure,
466 * cleanup is handled internally by this function.
467 */
468 rv = csio_request_irqs(hw);
469 if (rv != 0)
470 return -EINVAL;
471
472 return 0;
473
474intr_disable:
475 csio_intr_disable(hw, false);
476
477 return -EINVAL;
478}
479
480static int
481csio_resource_alloc(struct csio_hw *hw)
482{
483 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
484 int rv = -ENOMEM;
485
486 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
487 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
488
489 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
490 sizeof(struct csio_mb));
491 if (!hw->mb_mempool)
492 goto err;
493
494 hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
495 sizeof(struct csio_rnode));
496 if (!hw->rnode_mempool)
497 goto err_free_mb_mempool;
498
499 hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev,
500 CSIO_SCSI_RSP_LEN, 8, 0);
501 if (!hw->scsi_pci_pool)
502 goto err_free_rn_pool;
503
504 return 0;
505
506err_free_rn_pool:
507 mempool_destroy(hw->rnode_mempool);
508 hw->rnode_mempool = NULL;
509err_free_mb_mempool:
510 mempool_destroy(hw->mb_mempool);
511 hw->mb_mempool = NULL;
512err:
513 return rv;
514}
515
516static void
517csio_resource_free(struct csio_hw *hw)
518{
519 pci_pool_destroy(hw->scsi_pci_pool);
520 hw->scsi_pci_pool = NULL;
521 mempool_destroy(hw->rnode_mempool);
522 hw->rnode_mempool = NULL;
523 mempool_destroy(hw->mb_mempool);
524 hw->mb_mempool = NULL;
525}
526
527/*
528 * csio_hw_alloc - Allocate and initialize the HW module.
529 * @pdev: PCI device.
530 *
531 * Allocates HW structure, DMA, memory resources, maps BARS to
532 * host memory and initializes HW module.
533 */
534static struct csio_hw * __devinit
535csio_hw_alloc(struct pci_dev *pdev)
536{
537 struct csio_hw *hw;
538
539 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
540 if (!hw)
541 goto err;
542
543 hw->pdev = pdev;
544 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
545
546 /* memory pool/DMA pool allocation */
547 if (csio_resource_alloc(hw))
548 goto err_free_hw;
549
550 /* Get the start address of registers from BAR 0 */
551 hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0),
552 pci_resource_len(pdev, 0));
553 if (!hw->regstart) {
554 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
555 hw->regstart);
556 goto err_resource_free;
557 }
558
559 csio_hw_init_workers(hw);
560
561 if (csio_hw_init(hw))
562 goto err_unmap_bar;
563
564 csio_dfs_create(hw);
565
566 csio_dbg(hw, "hw:%p\n", hw);
567
568 return hw;
569
570err_unmap_bar:
571 csio_hw_exit_workers(hw);
572 iounmap(hw->regstart);
573err_resource_free:
574 csio_resource_free(hw);
575err_free_hw:
576 kfree(hw);
577err:
578 return NULL;
579}
580
581/*
582 * csio_hw_free - Uninitialize and free the HW module.
583 * @hw: The HW module
584 *
585 * Disable interrupts, uninit the HW module, free resources, free hw.
586 */
587static void
588csio_hw_free(struct csio_hw *hw)
589{
590 csio_intr_disable(hw, true);
591 csio_hw_exit_workers(hw);
592 csio_hw_exit(hw);
593 iounmap(hw->regstart);
594 csio_dfs_destroy(hw);
595 csio_resource_free(hw);
596 kfree(hw);
597}
598
599/**
600 * csio_shost_init - Create and initialize the lnode module.
601 * @hw: The HW module.
602 * @dev: The device associated with this invocation.
603 * @probe: Called from probe context or not?
604 * @os_pln: Parent lnode if any.
605 *
606 * Allocates lnode structure via scsi_host_alloc, initializes
607 * shost, initializes lnode module and registers with SCSI ML
608 * via scsi_host_add. This function is shared between physical and
609 * virtual node ports.
610 */
611struct csio_lnode *
612csio_shost_init(struct csio_hw *hw, struct device *dev,
613 bool probe, struct csio_lnode *pln)
614{
615 struct Scsi_Host *shost = NULL;
616 struct csio_lnode *ln;
617
618 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
619 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
620
621 /*
622 * hw->pdev is the physical port's PCI dev structure,
623 * which will be different from the NPIV dev structure.
624 */
625 if (dev == &hw->pdev->dev)
626 shost = scsi_host_alloc(
627 &csio_fcoe_shost_template,
628 sizeof(struct csio_lnode));
629 else
630 shost = scsi_host_alloc(
631 &csio_fcoe_shost_vport_template,
632 sizeof(struct csio_lnode));
633
634 if (!shost)
635 goto err;
636
637 ln = shost_priv(shost);
638 memset(ln, 0, sizeof(struct csio_lnode));
639
640 /* Link common lnode to this lnode */
641 ln->dev_num = (shost->host_no << 16);
642
643 shost->can_queue = CSIO_MAX_QUEUE;
644 shost->this_id = -1;
645 shost->unique_id = shost->host_no;
646 shost->max_cmd_len = 16; /* Max CDB length supported */
647 shost->max_id = min_t(uint32_t, csio_fcoe_rnodes,
648 hw->fres_info.max_ssns);
649 shost->max_lun = CSIO_MAX_LUN;
650 if (dev == &hw->pdev->dev)
651 shost->transportt = csio_fcoe_transport;
652 else
653 shost->transportt = csio_fcoe_transport_vport;
654
655 /* root lnode */
656 if (!hw->rln)
657 hw->rln = ln;
658
659 /* Other initialization here: Common, Transport specific */
660 if (csio_lnode_init(ln, hw, pln))
661 goto err_shost_put;
662
663 if (scsi_add_host(shost, dev))
664 goto err_lnode_exit;
665
666 return ln;
667
668err_lnode_exit:
669 csio_lnode_exit(ln);
670err_shost_put:
671 scsi_host_put(shost);
672err:
673 return NULL;
674}
675
676/**
677 * csio_shost_exit - De-instantiate the shost.
678 * @ln: The lnode module corresponding to the shost.
679 *
680 */
681void
682csio_shost_exit(struct csio_lnode *ln)
683{
684 struct Scsi_Host *shost = csio_ln_to_shost(ln);
685 struct csio_hw *hw = csio_lnode_to_hw(ln);
686
687 /* Inform transport */
688 fc_remove_host(shost);
689
690 /* Inform SCSI ML */
691 scsi_remove_host(shost);
692
693 /* Flush all the events, so that any rnode removal events
694 * already queued are all handled, before we remove the lnode.
695 */
696 spin_lock_irq(&hw->lock);
697 csio_evtq_flush(hw);
698 spin_unlock_irq(&hw->lock);
699
700 csio_lnode_exit(ln);
701 scsi_host_put(shost);
702}
703
704struct csio_lnode *
705csio_lnode_alloc(struct csio_hw *hw)
706{
707 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
708}
709
710void
711csio_lnodes_block_request(struct csio_hw *hw)
712{
713 struct Scsi_Host *shost;
714 struct csio_lnode *sln;
715 struct csio_lnode *ln;
716 struct list_head *cur_ln, *cur_cln;
717 struct csio_lnode **lnode_list;
718 int cur_cnt = 0, ii;
719
720 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
721 GFP_KERNEL);
722 if (!lnode_list) {
723 csio_err(hw, "Failed to allocate lnodes_list");
724 return;
725 }
726
727 spin_lock_irq(&hw->lock);
728 /* Traverse sibling lnodes */
729 list_for_each(cur_ln, &hw->sln_head) {
730 sln = (struct csio_lnode *) cur_ln;
731 lnode_list[cur_cnt++] = sln;
732
733 /* Traverse children lnodes */
734 list_for_each(cur_cln, &sln->cln_head)
735 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
736 }
737 spin_unlock_irq(&hw->lock);
738
739 for (ii = 0; ii < cur_cnt; ii++) {
740 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
741 ln = lnode_list[ii];
742 shost = csio_ln_to_shost(ln);
743 scsi_block_requests(shost);
744
745 }
746 kfree(lnode_list);
747}
748
749void
750csio_lnodes_unblock_request(struct csio_hw *hw)
751{
752 struct csio_lnode *ln;
753 struct Scsi_Host *shost;
754 struct csio_lnode *sln;
755 struct list_head *cur_ln, *cur_cln;
756 struct csio_lnode **lnode_list;
757 int cur_cnt = 0, ii;
758
759 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
760 GFP_KERNEL);
761 if (!lnode_list) {
762 csio_err(hw, "Failed to allocate lnodes_list");
763 return;
764 }
765
766 spin_lock_irq(&hw->lock);
767 /* Traverse sibling lnodes */
768 list_for_each(cur_ln, &hw->sln_head) {
769 sln = (struct csio_lnode *) cur_ln;
770 lnode_list[cur_cnt++] = sln;
771
772 /* Traverse children lnodes */
773 list_for_each(cur_cln, &sln->cln_head)
774 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
775 }
776 spin_unlock_irq(&hw->lock);
777
778 for (ii = 0; ii < cur_cnt; ii++) {
779 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
780 ln = lnode_list[ii];
781 shost = csio_ln_to_shost(ln);
782 scsi_unblock_requests(shost);
783 }
784 kfree(lnode_list);
785}
786
787void
788csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
789{
790 struct csio_lnode *ln;
791 struct Scsi_Host *shost;
792 struct csio_lnode *sln;
793 struct list_head *cur_ln, *cur_cln;
794 struct csio_lnode **lnode_list;
795 int cur_cnt = 0, ii;
796
797 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
798 GFP_KERNEL);
799 if (!lnode_list) {
800 csio_err(hw, "Failed to allocate lnodes_list");
801 return;
802 }
803
804 spin_lock_irq(&hw->lock);
805 /* Traverse sibling lnodes */
806 list_for_each(cur_ln, &hw->sln_head) {
807 sln = (struct csio_lnode *) cur_ln;
808 if (sln->portid != portid)
809 continue;
810
811 lnode_list[cur_cnt++] = sln;
812
813 /* Traverse children lnodes */
814 list_for_each(cur_cln, &sln->cln_head)
815 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
816 }
817 spin_unlock_irq(&hw->lock);
818
819 for (ii = 0; ii < cur_cnt; ii++) {
820 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
821 ln = lnode_list[ii];
822 shost = csio_ln_to_shost(ln);
823 scsi_block_requests(shost);
824 }
825 kfree(lnode_list);
826}
827
828void
829csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
830{
831 struct csio_lnode *ln;
832 struct Scsi_Host *shost;
833 struct csio_lnode *sln;
834 struct list_head *cur_ln, *cur_cln;
835 struct csio_lnode **lnode_list;
836 int cur_cnt = 0, ii;
837
838 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
839 GFP_KERNEL);
840 if (!lnode_list) {
841 csio_err(hw, "Failed to allocate lnodes_list");
842 return;
843 }
844
845 spin_lock_irq(&hw->lock);
846 /* Traverse sibling lnodes */
847 list_for_each(cur_ln, &hw->sln_head) {
848 sln = (struct csio_lnode *) cur_ln;
849 if (sln->portid != portid)
850 continue;
851 lnode_list[cur_cnt++] = sln;
852
853 /* Traverse children lnodes */
854 list_for_each(cur_cln, &sln->cln_head)
855 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
856 }
857 spin_unlock_irq(&hw->lock);
858
859 for (ii = 0; ii < cur_cnt; ii++) {
860 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
861 ln = lnode_list[ii];
862 shost = csio_ln_to_shost(ln);
863 scsi_unblock_requests(shost);
864 }
865 kfree(lnode_list);
866}
867
868void
869csio_lnodes_exit(struct csio_hw *hw, bool npiv)
870{
871 struct csio_lnode *sln;
872 struct csio_lnode *ln;
873 struct list_head *cur_ln, *cur_cln;
874 struct csio_lnode **lnode_list;
875 int cur_cnt = 0, ii;
876
877 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
878 GFP_KERNEL);
879 if (!lnode_list) {
880 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
881 return;
882 }
883
884 /* Get all child lnodes(NPIV ports) */
885 spin_lock_irq(&hw->lock);
886 list_for_each(cur_ln, &hw->sln_head) {
887 sln = (struct csio_lnode *) cur_ln;
888
889 /* Traverse children lnodes */
890 list_for_each(cur_cln, &sln->cln_head)
891 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
892 }
893 spin_unlock_irq(&hw->lock);
894
895 /* Delete NPIV lnodes */
896 for (ii = 0; ii < cur_cnt; ii++) {
897 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
898 ln = lnode_list[ii];
899 fc_vport_terminate(ln->fc_vport);
900 }
901
902 /* Delete only npiv lnodes */
903 if (npiv)
904 goto free_lnodes;
905
906 cur_cnt = 0;
907 /* Get all physical lnodes */
908 spin_lock_irq(&hw->lock);
909 /* Traverse sibling lnodes */
910 list_for_each(cur_ln, &hw->sln_head) {
911 sln = (struct csio_lnode *) cur_ln;
912 lnode_list[cur_cnt++] = sln;
913 }
914 spin_unlock_irq(&hw->lock);
915
916 /* Delete physical lnodes */
917 for (ii = 0; ii < cur_cnt; ii++) {
918 csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]);
919 csio_shost_exit(lnode_list[ii]);
920 }
921
922free_lnodes:
923 kfree(lnode_list);
924}
925
926/*
927 * csio_lnode_init_post: Set lnode attributes after starting HW.
928 * @ln: lnode.
929 *
930 */
931static void
932csio_lnode_init_post(struct csio_lnode *ln)
933{
934 struct Scsi_Host *shost = csio_ln_to_shost(ln);
935
936 csio_fchost_attr_init(ln);
937
938 scsi_scan_host(shost);
939}
940
941/*
942 * csio_probe_one - Instantiate this function.
943 * @pdev: PCI device
944 * @id: Device ID
945 *
946 * This is the .probe() callback of the driver. This function:
947 * - Initializes the PCI function by enabling MMIO, setting bus
948 * mastership and setting DMA mask.
949 * - Allocates HW structure, DMA, memory resources, maps BARS to
950 * host memory and initializes HW module.
951 * - Allocates lnode structure via scsi_host_alloc, initializes
952 * shost, initialized lnode module and registers with SCSI ML
953 * via scsi_host_add.
954 * - Enables interrupts, and starts the chip by kicking off the
955 * HW state machine.
956 * - Once hardware is ready, initiated scan of the host via
957 * scsi_scan_host.
958 */
959static int __devinit
960csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
961{
962 int rv;
963 int bars;
964 int i;
965 struct csio_hw *hw;
966 struct csio_lnode *ln;
967
968 rv = csio_pci_init(pdev, &bars);
969 if (rv)
970 goto err;
971
972 hw = csio_hw_alloc(pdev);
973 if (!hw) {
974 rv = -ENODEV;
975 goto err_pci_exit;
976 }
977
978 pci_set_drvdata(pdev, hw);
979
980 if (csio_hw_start(hw) != 0) {
981 dev_err(&pdev->dev,
982 "Failed to start FW, continuing in debug mode.\n");
983 return 0;
984 }
985
986 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
987 FW_HDR_FW_VER_MAJOR_GET(hw->fwrev),
988 FW_HDR_FW_VER_MINOR_GET(hw->fwrev),
989 FW_HDR_FW_VER_MICRO_GET(hw->fwrev),
990 FW_HDR_FW_VER_BUILD_GET(hw->fwrev));
991
992 for (i = 0; i < hw->num_pports; i++) {
993 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
994 if (!ln) {
995 rv = -ENODEV;
996 break;
997 }
998 /* Initialize portid */
999 ln->portid = hw->pport[i].portid;
1000
1001 spin_lock_irq(&hw->lock);
1002 if (csio_lnode_start(ln) != 0)
1003 rv = -ENODEV;
1004 spin_unlock_irq(&hw->lock);
1005
1006 if (rv)
1007 break;
1008
1009 csio_lnode_init_post(ln);
1010 }
1011
1012 if (rv)
1013 goto err_lnode_exit;
1014
1015 return 0;
1016
1017err_lnode_exit:
1018 csio_lnodes_block_request(hw);
1019 spin_lock_irq(&hw->lock);
1020 csio_hw_stop(hw);
1021 spin_unlock_irq(&hw->lock);
1022 csio_lnodes_unblock_request(hw);
1023 pci_set_drvdata(hw->pdev, NULL);
1024 csio_lnodes_exit(hw, 0);
1025 csio_hw_free(hw);
1026err_pci_exit:
1027 csio_pci_exit(pdev, &bars);
1028err:
1029 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1030 return rv;
1031}
1032
1033/*
1034 * csio_remove_one - Remove one instance of the driver at this PCI function.
1035 * @pdev: PCI device
1036 *
1037 * Used during hotplug operation.
1038 */
1039static void __devexit
1040csio_remove_one(struct pci_dev *pdev)
1041{
1042 struct csio_hw *hw = pci_get_drvdata(pdev);
1043 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1044
1045 csio_lnodes_block_request(hw);
1046 spin_lock_irq(&hw->lock);
1047
1048 /* Stops lnode, Rnode s/m
1049 * Quiesce IOs.
1050 * All sessions with remote ports are unregistered.
1051 */
1052 csio_hw_stop(hw);
1053 spin_unlock_irq(&hw->lock);
1054 csio_lnodes_unblock_request(hw);
1055
1056 csio_lnodes_exit(hw, 0);
1057 csio_hw_free(hw);
1058 pci_set_drvdata(pdev, NULL);
1059 csio_pci_exit(pdev, &bars);
1060}
1061
1062/*
1063 * csio_pci_error_detected - PCI error was detected
1064 * @pdev: PCI device
1065 *
1066 */
1067static pci_ers_result_t
1068csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1069{
1070 struct csio_hw *hw = pci_get_drvdata(pdev);
1071
1072 csio_lnodes_block_request(hw);
1073 spin_lock_irq(&hw->lock);
1074
1075 /* Post PCI error detected evt to HW s/m
1076 * HW s/m handles this evt by quiescing IOs, unregisters rports
1077 * and finally takes the device to offline.
1078 */
1079 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1080 spin_unlock_irq(&hw->lock);
1081 csio_lnodes_unblock_request(hw);
1082 csio_lnodes_exit(hw, 0);
1083 csio_intr_disable(hw, true);
1084 pci_disable_device(pdev);
1085 return state == pci_channel_io_perm_failure ?
1086 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1087}
1088
1089/*
1090 * csio_pci_slot_reset - PCI slot has been reset.
1091 * @pdev: PCI device
1092 *
1093 */
1094static pci_ers_result_t
1095csio_pci_slot_reset(struct pci_dev *pdev)
1096{
1097 struct csio_hw *hw = pci_get_drvdata(pdev);
1098 int ready;
1099
1100 if (pci_enable_device(pdev)) {
1101 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1102 return PCI_ERS_RESULT_DISCONNECT;
1103 }
1104
1105 pci_set_master(pdev);
1106 pci_restore_state(pdev);
1107 pci_save_state(pdev);
1108 pci_cleanup_aer_uncorrect_error_status(pdev);
1109
1110 /* Bring HW s/m to ready state.
1111 * but don't resume IOs.
1112 */
1113 spin_lock_irq(&hw->lock);
1114 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1115 ready = csio_is_hw_ready(hw);
1116 spin_unlock_irq(&hw->lock);
1117
1118 if (ready) {
1119 return PCI_ERS_RESULT_RECOVERED;
1120 } else {
1121 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1122 return PCI_ERS_RESULT_DISCONNECT;
1123 }
1124}
1125
1126/*
1127 * csio_pci_resume - Resume normal operations
1128 * @pdev: PCI device
1129 *
1130 */
1131static void
1132csio_pci_resume(struct pci_dev *pdev)
1133{
1134 struct csio_hw *hw = pci_get_drvdata(pdev);
1135 struct csio_lnode *ln;
1136 int rv = 0;
1137 int i;
1138
1139 /* Bring the LINK UP and Resume IO */
1140
1141 for (i = 0; i < hw->num_pports; i++) {
1142 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1143 if (!ln) {
1144 rv = -ENODEV;
1145 break;
1146 }
1147 /* Initialize portid */
1148 ln->portid = hw->pport[i].portid;
1149
1150 spin_lock_irq(&hw->lock);
1151 if (csio_lnode_start(ln) != 0)
1152 rv = -ENODEV;
1153 spin_unlock_irq(&hw->lock);
1154
1155 if (rv)
1156 break;
1157
1158 csio_lnode_init_post(ln);
1159 }
1160
1161 if (rv)
1162 goto err_resume_exit;
1163
1164 return;
1165
1166err_resume_exit:
1167 csio_lnodes_block_request(hw);
1168 spin_lock_irq(&hw->lock);
1169 csio_hw_stop(hw);
1170 spin_unlock_irq(&hw->lock);
1171 csio_lnodes_unblock_request(hw);
1172 csio_lnodes_exit(hw, 0);
1173 csio_hw_free(hw);
1174 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1175}
1176
1177static struct pci_error_handlers csio_err_handler = {
1178 .error_detected = csio_pci_error_detected,
1179 .slot_reset = csio_pci_slot_reset,
1180 .resume = csio_pci_resume,
1181};
1182
1183static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = {
1184 CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T440DBG FCOE */
1185 CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */
1186 CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */
1187 CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */
1188 CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */
1189 CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */
1190 CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */
1191 CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */
1192 CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */
1193 CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */
1194 CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */
1195 CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */
1196 CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */
1197 CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */
1198 CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */
1199 CSIO_DEVICE(CSIO_DEVID_PE10K, 0), /* PE10K FCOE */
1200 CSIO_DEVICE(CSIO_DEVID_PE10K_PF1, 0), /* PE10K FCOE on PF1 */
1201 { 0, 0, 0, 0, 0, 0, 0 }
1202};
1203
1204
1205static struct pci_driver csio_pci_driver = {
1206 .name = KBUILD_MODNAME,
1207 .driver = {
1208 .owner = THIS_MODULE,
1209 },
1210 .id_table = csio_pci_tbl,
1211 .probe = csio_probe_one,
1212 .remove = csio_remove_one,
1213 .err_handler = &csio_err_handler,
1214};
1215
1216/*
1217 * csio_init - Chelsio storage driver initialization function.
1218 *
1219 */
1220static int __init
1221csio_init(void)
1222{
1223 int rv = -ENOMEM;
1224
1225 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1226
1227 csio_dfs_init();
1228
1229 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1230 if (!csio_fcoe_transport)
1231 goto err;
1232
1233 csio_fcoe_transport_vport =
1234 fc_attach_transport(&csio_fc_transport_vport_funcs);
1235 if (!csio_fcoe_transport_vport)
1236 goto err_vport;
1237
1238 rv = pci_register_driver(&csio_pci_driver);
1239 if (rv)
1240 goto err_pci;
1241
1242 return 0;
1243
1244err_pci:
1245 fc_release_transport(csio_fcoe_transport_vport);
1246err_vport:
1247 fc_release_transport(csio_fcoe_transport);
1248err:
1249 csio_dfs_exit();
1250 return rv;
1251}
1252
1253/*
1254 * csio_exit - Chelsio storage driver uninitialization .
1255 *
1256 * Function that gets called in the unload path.
1257 */
1258static void __exit
1259csio_exit(void)
1260{
1261 pci_unregister_driver(&csio_pci_driver);
1262 csio_dfs_exit();
1263 fc_release_transport(csio_fcoe_transport_vport);
1264 fc_release_transport(csio_fcoe_transport);
1265}
1266
1267module_init(csio_init);
1268module_exit(csio_exit);
1269MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1270MODULE_DESCRIPTION(CSIO_DRV_DESC);
1271MODULE_LICENSE(CSIO_DRV_LICENSE);
1272MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1273MODULE_VERSION(CSIO_DRV_VERSION);
1274MODULE_FIRMWARE(CSIO_FW_FNAME);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-11 12:51:13 -0400