2 * This file is part of the Chelsio FCoE driver for Linux.
4 * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
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>
50 #include "csio_init.h"
51 #include "csio_defs.h"
53 #define CSIO_MIN_MEMPOOL_SZ 64
55 static struct dentry *csio_debugfs_root;
57 static struct scsi_transport_template *csio_fcoe_transport;
58 static struct scsi_transport_template *csio_fcoe_transport_vport;
64 csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *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;
75 if (count > avail - pos)
84 ret = hw->chip_ops->chip_mc_read(hw, 0, pos,
87 ret = hw->chip_ops->chip_edc_read(hw, mem, pos,
92 ofst = pos % sizeof(data);
93 len = min(count, sizeof(data) - ofst);
94 if (copy_to_user(buf, (u8 *)data + ofst, len))
106 static const struct file_operations csio_mem_debugfs_fops = {
107 .owner = THIS_MODULE,
109 .read = csio_mem_read,
110 .llseek = default_llseek,
113 void csio_add_debugfs_mem(struct csio_hw *hw, const char *name,
114 unsigned int idx, unsigned int size_mb)
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;
124 static int csio_setup_debugfs(struct csio_hw *hw)
128 if (IS_ERR_OR_NULL(hw->debugfs_root))
131 i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A);
132 if (i & EDRAM0_ENABLE_F)
133 csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5);
134 if (i & EDRAM1_ENABLE_F)
135 csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5);
137 hw->chip_ops->chip_dfs_create_ext_mem(hw);
142 * csio_dfs_create - Creates and sets up per-hw debugfs.
146 csio_dfs_create(struct csio_hw *hw)
148 if (csio_debugfs_root) {
149 hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev),
151 csio_setup_debugfs(hw);
158 * csio_dfs_destroy - Destroys per-hw debugfs.
161 csio_dfs_destroy(struct csio_hw *hw)
163 if (hw->debugfs_root)
164 debugfs_remove_recursive(hw->debugfs_root);
170 * csio_dfs_init - Debug filesystem initialization for the module.
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");
184 * csio_dfs_exit - debugfs cleanup for the module.
189 debugfs_remove(csio_debugfs_root);
193 * csio_pci_init - PCI initialization.
195 * @bars: Bitmask of bars to be requested.
197 * Initializes the PCI function by enabling MMIO, setting bus
198 * mastership and setting DMA mask.
201 csio_pci_init(struct pci_dev *pdev, int *bars)
205 *bars = pci_select_bars(pdev, IORESOURCE_MEM);
207 if (pci_enable_device_mem(pdev))
210 if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME))
211 goto err_disable_device;
213 pci_set_master(pdev);
214 pci_try_set_mwi(pdev);
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));
221 dev_err(&pdev->dev, "No suitable DMA available.\n");
222 goto err_release_regions;
228 pci_release_selected_regions(pdev, *bars);
230 pci_disable_device(pdev);
237 * csio_pci_exit - PCI unitialization.
239 * @bars: Bars to be released.
243 csio_pci_exit(struct pci_dev *pdev, int *bars)
245 pci_release_selected_regions(pdev, *bars);
246 pci_disable_device(pdev);
250 * csio_hw_init_workers - Initialize the HW module's worker threads.
255 csio_hw_init_workers(struct csio_hw *hw)
257 INIT_WORK(&hw->evtq_work, csio_evtq_worker);
261 csio_hw_exit_workers(struct csio_hw *hw)
263 cancel_work_sync(&hw->evtq_work);
264 flush_scheduled_work();
268 csio_create_queues(struct csio_hw *hw)
271 struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
273 struct csio_scsi_cpu_info *info;
275 if (hw->flags & CSIO_HWF_Q_FW_ALLOCED)
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);
282 csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv);
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);
292 csio_err(hw, "FW event IQ config failed!: %d\n", rv);
296 /* Create mgmt queue */
297 rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx,
298 mgmtm->iq_idx, hw->pport[0].portid, NULL);
301 csio_err(hw, "Mgmt EQ create failed!: %d\n", rv);
305 /* Create SCSI queues */
306 for (i = 0; i < hw->num_pports; i++) {
307 info = &hw->scsi_cpu_info[i];
309 for (j = 0; j < info->max_cpus; j++) {
310 struct csio_scsi_qset *sqset = &hw->sqset[i][j];
312 rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx,
313 sqset->intr_idx, i, false, NULL);
316 "SCSI module IQ config failed [%d][%d]:%d\n",
320 rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx,
321 sqset->iq_idx, i, NULL);
324 "SCSI module EQ config failed [%d][%d]:%d\n",
329 } /* For all ports */
331 hw->flags |= CSIO_HWF_Q_FW_ALLOCED;
334 csio_wr_destroy_queues(hw, true);
339 * csio_config_queues - Configure the DMA queues.
342 * Allocates memory for queues are registers them with FW.
345 csio_config_queues(struct csio_hw *hw)
347 int i, j, idx, k = 0;
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;
354 if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED)
355 return csio_create_queues(hw);
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;
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;
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;
370 csio_dbg(hw, "nsqsets:%d scpus:%d\n",
371 hw->num_sqsets, hw->num_scsi_msix_cpus);
373 csio_intr_enable(hw);
375 if (hw->intr_mode != CSIO_IM_MSIX) {
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) {
383 "Forward interrupt queue creation failed\n");
388 /* Allocate the FW evt queue */
389 hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE,
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");
399 /* Allocate the mgmt queue */
400 mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE,
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");
408 /* Use FW IQ for MGMT req completion */
409 mgmtm->iq_idx = hw->fwevt_iq_idx;
411 /* Allocate SCSI queues */
412 for (i = 0; i < hw->num_pports; i++) {
413 info = &hw->scsi_cpu_info[i];
415 for (j = 0; j < hw->num_scsi_msix_cpus; j++) {
416 sqset = &hw->sqset[i][j];
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;
426 idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0,
427 CSIO_EGRESS, (void *)hw, 0, 0,
430 csio_err(hw, "EQ creation failed for idx:%d\n",
437 idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE,
438 CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS,
440 csio_scsi_intx_handler);
442 csio_err(hw, "IQ creation failed for idx:%d\n",
448 } /* For all ports */
450 hw->flags |= CSIO_HWF_Q_MEM_ALLOCED;
452 rv = csio_create_queues(hw);
457 * Now request IRQs for the vectors. In the event of a failure,
458 * cleanup is handled internally by this function.
460 rv = csio_request_irqs(hw);
467 csio_intr_disable(hw, false);
473 csio_resource_alloc(struct csio_hw *hw)
475 struct csio_wrm *wrm = csio_hw_to_wrm(hw);
478 wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ +
479 CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ);
481 hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ,
482 sizeof(struct csio_mb));
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;
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;
499 mempool_destroy(hw->rnode_mempool);
500 hw->rnode_mempool = NULL;
502 mempool_destroy(hw->mb_mempool);
503 hw->mb_mempool = NULL;
509 csio_resource_free(struct csio_hw *hw)
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;
520 * csio_hw_alloc - Allocate and initialize the HW module.
523 * Allocates HW structure, DMA, memory resources, maps BARS to
524 * host memory and initializes HW module.
526 static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev)
530 hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL);
535 strncpy(hw->drv_version, CSIO_DRV_VERSION, 32);
537 /* memory pool/DMA pool allocation */
538 if (csio_resource_alloc(hw))
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));
545 csio_err(hw, "Could not map BAR 0, regstart = %p\n",
547 goto err_resource_free;
550 csio_hw_init_workers(hw);
552 if (csio_hw_init(hw))
557 csio_dbg(hw, "hw:%p\n", hw);
562 csio_hw_exit_workers(hw);
563 iounmap(hw->regstart);
565 csio_resource_free(hw);
573 * csio_hw_free - Uninitialize and free the HW module.
576 * Disable interrupts, uninit the HW module, free resources, free hw.
579 csio_hw_free(struct csio_hw *hw)
581 csio_intr_disable(hw, true);
582 csio_hw_exit_workers(hw);
584 iounmap(hw->regstart);
585 csio_dfs_destroy(hw);
586 csio_resource_free(hw);
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.
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.
603 csio_shost_init(struct csio_hw *hw, struct device *dev,
604 bool probe, struct csio_lnode *pln)
606 struct Scsi_Host *shost = NULL;
607 struct csio_lnode *ln;
609 csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth;
610 csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth;
613 * hw->pdev is the physical port's PCI dev structure,
614 * which will be different from the NPIV dev structure.
616 if (dev == &hw->pdev->dev)
617 shost = scsi_host_alloc(
618 &csio_fcoe_shost_template,
619 sizeof(struct csio_lnode));
621 shost = scsi_host_alloc(
622 &csio_fcoe_shost_vport_template,
623 sizeof(struct csio_lnode));
628 ln = shost_priv(shost);
629 memset(ln, 0, sizeof(struct csio_lnode));
631 /* Link common lnode to this lnode */
632 ln->dev_num = (shost->host_no << 16);
634 shost->can_queue = CSIO_MAX_QUEUE;
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;
644 shost->transportt = csio_fcoe_transport_vport;
650 /* Other initialization here: Common, Transport specific */
651 if (csio_lnode_init(ln, hw, pln))
654 if (scsi_add_host(shost, dev))
662 scsi_host_put(shost);
668 * csio_shost_exit - De-instantiate the shost.
669 * @ln: The lnode module corresponding to the shost.
673 csio_shost_exit(struct csio_lnode *ln)
675 struct Scsi_Host *shost = csio_ln_to_shost(ln);
676 struct csio_hw *hw = csio_lnode_to_hw(ln);
678 /* Inform transport */
679 fc_remove_host(shost);
682 scsi_remove_host(shost);
684 /* Flush all the events, so that any rnode removal events
685 * already queued are all handled, before we remove the lnode.
687 spin_lock_irq(&hw->lock);
689 spin_unlock_irq(&hw->lock);
692 scsi_host_put(shost);
696 csio_lnode_alloc(struct csio_hw *hw)
698 return csio_shost_init(hw, &hw->pdev->dev, false, NULL);
702 csio_lnodes_block_request(struct csio_hw *hw)
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;
711 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
714 csio_err(hw, "Failed to allocate lnodes_list");
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;
724 /* Traverse children lnodes */
725 list_for_each(cur_cln, &sln->cln_head)
726 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
728 spin_unlock_irq(&hw->lock);
730 for (ii = 0; ii < cur_cnt; ii++) {
731 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
733 shost = csio_ln_to_shost(ln);
734 scsi_block_requests(shost);
741 csio_lnodes_unblock_request(struct csio_hw *hw)
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;
750 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
753 csio_err(hw, "Failed to allocate lnodes_list");
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;
763 /* Traverse children lnodes */
764 list_for_each(cur_cln, &sln->cln_head)
765 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
767 spin_unlock_irq(&hw->lock);
769 for (ii = 0; ii < cur_cnt; ii++) {
770 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
772 shost = csio_ln_to_shost(ln);
773 scsi_unblock_requests(shost);
779 csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
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;
788 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
791 csio_err(hw, "Failed to allocate lnodes_list");
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)
802 lnode_list[cur_cnt++] = sln;
804 /* Traverse children lnodes */
805 list_for_each(cur_cln, &sln->cln_head)
806 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
808 spin_unlock_irq(&hw->lock);
810 for (ii = 0; ii < cur_cnt; ii++) {
811 csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]);
813 shost = csio_ln_to_shost(ln);
814 scsi_block_requests(shost);
820 csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
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;
829 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
832 csio_err(hw, "Failed to allocate lnodes_list");
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)
842 lnode_list[cur_cnt++] = sln;
844 /* Traverse children lnodes */
845 list_for_each(cur_cln, &sln->cln_head)
846 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
848 spin_unlock_irq(&hw->lock);
850 for (ii = 0; ii < cur_cnt; ii++) {
851 csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]);
853 shost = csio_ln_to_shost(ln);
854 scsi_unblock_requests(shost);
860 csio_lnodes_exit(struct csio_hw *hw, bool npiv)
862 struct csio_lnode *sln;
863 struct csio_lnode *ln;
864 struct list_head *cur_ln, *cur_cln;
865 struct csio_lnode **lnode_list;
868 lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
871 csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
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;
880 /* Traverse children lnodes */
881 list_for_each(cur_cln, &sln->cln_head)
882 lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln;
884 spin_unlock_irq(&hw->lock);
886 /* Delete NPIV lnodes */
887 for (ii = 0; ii < cur_cnt; ii++) {
888 csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]);
890 fc_vport_terminate(ln->fc_vport);
893 /* Delete only npiv lnodes */
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;
905 spin_unlock_irq(&hw->lock);
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]);
918 * csio_lnode_init_post: Set lnode attributes after starting HW.
923 csio_lnode_init_post(struct csio_lnode *ln)
925 struct Scsi_Host *shost = csio_ln_to_shost(ln);
927 csio_fchost_attr_init(ln);
929 scsi_scan_host(shost);
933 * csio_probe_one - Instantiate this function.
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
945 * - Enables interrupts, and starts the chip by kicking off the
947 * - Once hardware is ready, initiated scan of the host via
950 static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
956 struct csio_lnode *ln;
958 /* probe only T5 cards */
959 if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)))
962 rv = csio_pci_init(pdev, &bars);
966 hw = csio_hw_alloc(pdev);
972 pci_set_drvdata(pdev, hw);
974 if (csio_hw_start(hw) != 0) {
976 "Failed to start FW, continuing in debug mode.\n");
980 sprintf(hw->fwrev_str, "%u.%u.%u.%u\n",
981 FW_HDR_FW_VER_MAJOR_G(hw->fwrev),
982 FW_HDR_FW_VER_MINOR_G(hw->fwrev),
983 FW_HDR_FW_VER_MICRO_G(hw->fwrev),
984 FW_HDR_FW_VER_BUILD_G(hw->fwrev));
986 for (i = 0; i < hw->num_pports; i++) {
987 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
992 /* Initialize portid */
993 ln->portid = hw->pport[i].portid;
995 spin_lock_irq(&hw->lock);
996 if (csio_lnode_start(ln) != 0)
998 spin_unlock_irq(&hw->lock);
1003 csio_lnode_init_post(ln);
1007 goto err_lnode_exit;
1012 csio_lnodes_block_request(hw);
1013 spin_lock_irq(&hw->lock);
1015 spin_unlock_irq(&hw->lock);
1016 csio_lnodes_unblock_request(hw);
1017 csio_lnodes_exit(hw, 0);
1020 csio_pci_exit(pdev, &bars);
1022 dev_err(&pdev->dev, "probe of device failed: %d\n", rv);
1027 * csio_remove_one - Remove one instance of the driver at this PCI function.
1030 * Used during hotplug operation.
1032 static void csio_remove_one(struct pci_dev *pdev)
1034 struct csio_hw *hw = pci_get_drvdata(pdev);
1035 int bars = pci_select_bars(pdev, IORESOURCE_MEM);
1037 csio_lnodes_block_request(hw);
1038 spin_lock_irq(&hw->lock);
1040 /* Stops lnode, Rnode s/m
1042 * All sessions with remote ports are unregistered.
1045 spin_unlock_irq(&hw->lock);
1046 csio_lnodes_unblock_request(hw);
1048 csio_lnodes_exit(hw, 0);
1050 csio_pci_exit(pdev, &bars);
1054 * csio_pci_error_detected - PCI error was detected
1058 static pci_ers_result_t
1059 csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
1061 struct csio_hw *hw = pci_get_drvdata(pdev);
1063 csio_lnodes_block_request(hw);
1064 spin_lock_irq(&hw->lock);
1066 /* Post PCI error detected evt to HW s/m
1067 * HW s/m handles this evt by quiescing IOs, unregisters rports
1068 * and finally takes the device to offline.
1070 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED);
1071 spin_unlock_irq(&hw->lock);
1072 csio_lnodes_unblock_request(hw);
1073 csio_lnodes_exit(hw, 0);
1074 csio_intr_disable(hw, true);
1075 pci_disable_device(pdev);
1076 return state == pci_channel_io_perm_failure ?
1077 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
1081 * csio_pci_slot_reset - PCI slot has been reset.
1085 static pci_ers_result_t
1086 csio_pci_slot_reset(struct pci_dev *pdev)
1088 struct csio_hw *hw = pci_get_drvdata(pdev);
1091 if (pci_enable_device(pdev)) {
1092 dev_err(&pdev->dev, "cannot re-enable device in slot reset\n");
1093 return PCI_ERS_RESULT_DISCONNECT;
1096 pci_set_master(pdev);
1097 pci_restore_state(pdev);
1098 pci_save_state(pdev);
1099 pci_cleanup_aer_uncorrect_error_status(pdev);
1101 /* Bring HW s/m to ready state.
1102 * but don't resume IOs.
1104 spin_lock_irq(&hw->lock);
1105 csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET);
1106 ready = csio_is_hw_ready(hw);
1107 spin_unlock_irq(&hw->lock);
1110 return PCI_ERS_RESULT_RECOVERED;
1112 dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n");
1113 return PCI_ERS_RESULT_DISCONNECT;
1118 * csio_pci_resume - Resume normal operations
1123 csio_pci_resume(struct pci_dev *pdev)
1125 struct csio_hw *hw = pci_get_drvdata(pdev);
1126 struct csio_lnode *ln;
1130 /* Bring the LINK UP and Resume IO */
1132 for (i = 0; i < hw->num_pports; i++) {
1133 ln = csio_shost_init(hw, &pdev->dev, true, NULL);
1138 /* Initialize portid */
1139 ln->portid = hw->pport[i].portid;
1141 spin_lock_irq(&hw->lock);
1142 if (csio_lnode_start(ln) != 0)
1144 spin_unlock_irq(&hw->lock);
1149 csio_lnode_init_post(ln);
1153 goto err_resume_exit;
1158 csio_lnodes_block_request(hw);
1159 spin_lock_irq(&hw->lock);
1161 spin_unlock_irq(&hw->lock);
1162 csio_lnodes_unblock_request(hw);
1163 csio_lnodes_exit(hw, 0);
1165 dev_err(&pdev->dev, "resume of device failed: %d\n", rv);
1168 static struct pci_error_handlers csio_err_handler = {
1169 .error_detected = csio_pci_error_detected,
1170 .slot_reset = csio_pci_slot_reset,
1171 .resume = csio_pci_resume,
1175 * Macros needed to support the PCI Device ID Table ...
1177 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
1178 static struct pci_device_id csio_pci_tbl[] = {
1179 /* Define for FCoE uses PF6 */
1180 #define CH_PCI_DEVICE_ID_FUNCTION 0x6
1182 #define CH_PCI_ID_TABLE_ENTRY(devid) \
1183 { PCI_VDEVICE(CHELSIO, (devid)), 0 }
1185 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
1187 #include "t4_pci_id_tbl.h"
1189 static struct pci_driver csio_pci_driver = {
1190 .name = KBUILD_MODNAME,
1192 .owner = THIS_MODULE,
1194 .id_table = csio_pci_tbl,
1195 .probe = csio_probe_one,
1196 .remove = csio_remove_one,
1197 .err_handler = &csio_err_handler,
1201 * csio_init - Chelsio storage driver initialization function.
1209 pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION);
1213 csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs);
1214 if (!csio_fcoe_transport)
1217 csio_fcoe_transport_vport =
1218 fc_attach_transport(&csio_fc_transport_vport_funcs);
1219 if (!csio_fcoe_transport_vport)
1222 rv = pci_register_driver(&csio_pci_driver);
1229 fc_release_transport(csio_fcoe_transport_vport);
1231 fc_release_transport(csio_fcoe_transport);
1238 * csio_exit - Chelsio storage driver uninitialization .
1240 * Function that gets called in the unload path.
1245 pci_unregister_driver(&csio_pci_driver);
1247 fc_release_transport(csio_fcoe_transport_vport);
1248 fc_release_transport(csio_fcoe_transport);
1251 module_init(csio_init);
1252 module_exit(csio_exit);
1253 MODULE_AUTHOR(CSIO_DRV_AUTHOR);
1254 MODULE_DESCRIPTION(CSIO_DRV_DESC);
1255 MODULE_LICENSE(CSIO_DRV_LICENSE);
1256 MODULE_DEVICE_TABLE(pci, csio_pci_tbl);
1257 MODULE_VERSION(CSIO_DRV_VERSION);
1258 MODULE_FIRMWARE(FW_FNAME_T5);