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Merge tag 'arm64-suspend' of git://linux-arm.org/linux-2.6-lp into upstream
[linux-2.6/btrfs-unstable.git] / drivers / scsi / csiostor / csio_init.c
blob1aafc331ee63a1a2d9380ffd53710da3466bbf96
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
55 static struct dentry *csio_debugfs_root;
56
57 static struct scsi_transport_template *csio_fcoe_transport;
58 static struct scsi_transport_template *csio_fcoe_transport_vport;
59
60 /*
61 * debugfs support
62 */
63 static ssize_t
64 csio_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
106 static 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
113 void 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
124 static 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 */
145 static int
146 csio_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 */
160 static int
161 csio_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 */
173 static int
174 csio_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 */
186 static void
187 csio_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 */
200 static int
201 csio_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
227 err_release_regions:
228 pci_release_selected_regions(pdev, *bars);
229 err_disable_device:
230 pci_disable_device(pdev);
231 err:
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 */
242 static void
243 csio_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 */
254 static void
255 csio_hw_init_workers(struct csio_hw *hw)
256 {
257 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
258 }
259
260 static void
261 csio_hw_exit_workers(struct csio_hw *hw)
262 {
263 cancel_work_sync(&hw->evtq_work);
264 flush_scheduled_work();
265 }
266
267 static int
268 csio_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;
333 err:
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 */
344 int
345 csio_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
466 intr_disable:
467 csio_intr_disable(hw, false);
468
469 return -EINVAL;
470 }
471
472 static int
473 csio_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
498 err_free_rn_pool:
499 mempool_destroy(hw->rnode_mempool);
500 hw->rnode_mempool = NULL;
501 err_free_mb_mempool:
502 mempool_destroy(hw->mb_mempool);
503 hw->mb_mempool = NULL;
504 err:
505 return rv;
506 }
507
508 static void
509 csio_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 */
526 static 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
561 err_unmap_bar:
562 csio_hw_exit_workers(hw);
563 iounmap(hw->regstart);
564 err_resource_free:
565 csio_resource_free(hw);
566 err_free_hw:
567 kfree(hw);
568 err:
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 */
578 static void
579 csio_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 */
602 struct csio_lnode *
603 csio_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
659 err_lnode_exit:
660 csio_lnode_exit(ln);
661 err_shost_put:
662 scsi_host_put(shost);
663 err:
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 */
672 void
673 csio_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
695 struct csio_lnode *
696 csio_lnode_alloc(struct csio_hw *hw)
697 {
698 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
699 }
700
701 void
702 csio_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
740 void
741 csio_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
778 void
779 csio_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
819 void
820 csio_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
859 void
860 csio_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
913 free_lnodes:
914 kfree(lnode_list);
915 }
916
917 /*
918 * csio_lnode_init_post: Set lnode attributes after starting HW.
919 * @ln: lnode.
920 *
921 */
922 static void
923 csio_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 */
950 static 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
1007 err_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);
1015 err_pci_exit:
1016 csio_pci_exit(pdev, &bars);
1017 err:
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 */
1028 static 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 */
1054 static pci_ers_result_t
1055 csio_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 */
1081 static pci_ers_result_t
1082 csio_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 */
1118 static void
1119 csio_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
1153 err_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
1164 static 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
1170 static 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
1218 static 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 */
1233 static int __init
1234 csio_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
1257 err_pci:
1258 fc_release_transport(csio_fcoe_transport_vport);
1259 err_vport:
1260 fc_release_transport(csio_fcoe_transport);
1261 err:
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 */
1271 static void __exit
1272 csio_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
1280 module_init(csio_init);
1281 module_exit(csio_exit);
1282 MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1283 MODULE_DESCRIPTION(CSIO_DRV_DESC);
1284 MODULE_LICENSE(CSIO_DRV_LICENSE);
1285 MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1286 MODULE_VERSION(CSIO_DRV_VERSION);
1287 MODULE_FIRMWARE(FW_FNAME_T4);
1288 MODULE_FIRMWARE(FW_FNAME_T5);
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