/* * This file is part of the Chelsio FCoE driver for Linux. * * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include "csio_init.h" #include "csio_defs.h" #define CSIO_MIN_MEMPOOL_SZ 64 static struct dentry *csio_debugfs_root; static struct scsi_transport_template *csio_fcoe_transport; static struct scsi_transport_template *csio_fcoe_transport_vport; /* * debugfs support */ static ssize_t csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { loff_t pos = *ppos; loff_t avail = file_inode(file)->i_size; unsigned int mem = (uintptr_t)file->private_data & 3; struct csio_hw *hw = file->private_data - mem; if (pos < 0) return -EINVAL; if (pos >= avail) return 0; if (count > avail - pos) count = avail - pos; while (count) { size_t len; int ret, ofst; __be32 data[16]; if (mem == MEM_MC) ret = hw->chip_ops->chip_mc_read(hw, 0, pos, data, NULL); else ret = hw->chip_ops->chip_edc_read(hw, mem, pos, data, NULL); if (ret) return ret; ofst = pos % sizeof(data); len = min(count, sizeof(data) - ofst); if (copy_to_user(buf, (u8 *)data + ofst, len)) return -EFAULT; buf += len; pos += len; count -= len; } count = pos - *ppos; *ppos = pos; return count; } static const struct file_operations csio_mem_debugfs_fops = { .owner = THIS_MODULE, .open = simple_open, .read = csio_mem_read, .llseek = default_llseek, }; void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, unsigned int idx, unsigned int size_mb) { struct dentry *de; de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root, (void *)hw + idx, &csio_mem_debugfs_fops); if (de && de->d_inode) de->d_inode->i_size = size_mb << 20; } static int csio_setup_debugfs(struct csio_hw *hw) { int i; if (IS_ERR_OR_NULL(hw->debugfs_root)) return -1; i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A); if (i & EDRAM0_ENABLE_F) csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); if (i & EDRAM1_ENABLE_F) csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); hw->chip_ops->chip_dfs_create_ext_mem(hw); return 0; } /* * csio_dfs_create - Creates and sets up per-hw debugfs. * */ static int csio_dfs_create(struct csio_hw *hw) { if (csio_debugfs_root) { hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), csio_debugfs_root); csio_setup_debugfs(hw); } return 0; } /* * csio_dfs_destroy - Destroys per-hw debugfs. */ static int csio_dfs_destroy(struct csio_hw *hw) { if (hw->debugfs_root) debugfs_remove_recursive(hw->debugfs_root); return 0; } /* * csio_dfs_init - Debug filesystem initialization for the module. * */ static int csio_dfs_init(void) { csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); if (!csio_debugfs_root) pr_warn("Could not create debugfs entry, continuing\n"); return 0; } /* * csio_dfs_exit - debugfs cleanup for the module. */ static void csio_dfs_exit(void) { debugfs_remove(csio_debugfs_root); } /* * csio_pci_init - PCI initialization. * @pdev: PCI device. * @bars: Bitmask of bars to be requested. * * Initializes the PCI function by enabling MMIO, setting bus * mastership and setting DMA mask. */ static int csio_pci_init(struct pci_dev *pdev, int *bars) { int rv = -ENODEV; *bars = pci_select_bars(pdev, IORESOURCE_MEM); if (pci_enable_device_mem(pdev)) goto err; if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) goto err_disable_device; pci_set_master(pdev); pci_try_set_mwi(pdev); if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); } else { dev_err(&pdev->dev, "No suitable DMA available.\n"); goto err_release_regions; } return 0; err_release_regions: pci_release_selected_regions(pdev, *bars); err_disable_device: pci_disable_device(pdev); err: return rv; } /* * csio_pci_exit - PCI unitialization. * @pdev: PCI device. * @bars: Bars to be released. * */ static void csio_pci_exit(struct pci_dev *pdev, int *bars) { pci_release_selected_regions(pdev, *bars); pci_disable_device(pdev); } /* * csio_hw_init_workers - Initialize the HW module's worker threads. * @hw: HW module. * */ static void csio_hw_init_workers(struct csio_hw *hw) { INIT_WORK(&hw->evtq_work, csio_evtq_worker); } static void csio_hw_exit_workers(struct csio_hw *hw) { cancel_work_sync(&hw->evtq_work); flush_scheduled_work(); } static int csio_create_queues(struct csio_hw *hw) { int i, j; struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); int rv; struct csio_scsi_cpu_info *info; if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) return 0; if (hw->intr_mode != CSIO_IM_MSIX) { rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, 0, hw->pport[0].portid, false, NULL); if (rv != 0) { csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); return rv; } } /* FW event queue */ rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, csio_get_fwevt_intr_idx(hw), hw->pport[0].portid, true, NULL); if (rv != 0) { csio_err(hw, "FW event IQ config failed!: %d\n", rv); return rv; } /* Create mgmt queue */ rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, mgmtm->iq_idx, hw->pport[0].portid, NULL); if (rv != 0) { csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); goto err; } /* Create SCSI queues */ for (i = 0; i < hw->num_pports; i++) { info = &hw->scsi_cpu_info[i]; for (j = 0; j < info->max_cpus; j++) { struct csio_scsi_qset *sqset = &hw->sqset[i][j]; rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, sqset->intr_idx, i, false, NULL); if (rv != 0) { csio_err(hw, "SCSI module IQ config failed [%d][%d]:%d\n", i, j, rv); goto err; } rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, sqset->iq_idx, i, NULL); if (rv != 0) { csio_err(hw, "SCSI module EQ config failed [%d][%d]:%d\n", i, j, rv); goto err; } } /* for all CPUs */ } /* For all ports */ hw->flags |= CSIO_HWF_Q_FW_ALLOCED; return 0; err: csio_wr_destroy_queues(hw, true); return -EINVAL; } /* * csio_config_queues - Configure the DMA queues. * @hw: HW module. * * Allocates memory for queues are registers them with FW. */ int csio_config_queues(struct csio_hw *hw) { int i, j, idx, k = 0; int rv; struct csio_scsi_qset *sqset; struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); struct csio_scsi_qset *orig; struct csio_scsi_cpu_info *info; if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) return csio_create_queues(hw); /* Calculate number of SCSI queues for MSIX we would like */ hw->num_scsi_msix_cpus = num_online_cpus(); hw->num_sqsets = num_online_cpus() * hw->num_pports; if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { hw->num_sqsets = CSIO_MAX_SCSI_QSETS; hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; } /* Initialize max_cpus, may get reduced during msix allocations */ for (i = 0; i < hw->num_pports; i++) hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; csio_dbg(hw, "nsqsets:%d scpus:%d\n", hw->num_sqsets, hw->num_scsi_msix_cpus); csio_intr_enable(hw); if (hw->intr_mode != CSIO_IM_MSIX) { /* Allocate Forward interrupt iq. */ hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, CSIO_INTR_WRSIZE, CSIO_INGRESS, (void *)hw, 0, 0, NULL); if (hw->intr_iq_idx == -1) { csio_err(hw, "Forward interrupt queue creation failed\n"); goto intr_disable; } } /* Allocate the FW evt queue */ hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, CSIO_FWEVT_WRSIZE, CSIO_INGRESS, (void *)hw, CSIO_FWEVT_FLBUFS, 0, csio_fwevt_intx_handler); if (hw->fwevt_iq_idx == -1) { csio_err(hw, "FW evt queue creation failed\n"); goto intr_disable; } /* Allocate the mgmt queue */ mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, CSIO_MGMT_EQ_WRSIZE, CSIO_EGRESS, (void *)hw, 0, 0, NULL); if (mgmtm->eq_idx == -1) { csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); goto intr_disable; } /* Use FW IQ for MGMT req completion */ mgmtm->iq_idx = hw->fwevt_iq_idx; /* Allocate SCSI queues */ for (i = 0; i < hw->num_pports; i++) { info = &hw->scsi_cpu_info[i]; for (j = 0; j < hw->num_scsi_msix_cpus; j++) { sqset = &hw->sqset[i][j]; if (j >= info->max_cpus) { k = j % info->max_cpus; orig = &hw->sqset[i][k]; sqset->eq_idx = orig->eq_idx; sqset->iq_idx = orig->iq_idx; continue; } idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, CSIO_EGRESS, (void *)hw, 0, 0, NULL); if (idx == -1) { csio_err(hw, "EQ creation failed for idx:%d\n", idx); goto intr_disable; } sqset->eq_idx = idx; idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, (void *)hw, 0, 0, csio_scsi_intx_handler); if (idx == -1) { csio_err(hw, "IQ creation failed for idx:%d\n", idx); goto intr_disable; } sqset->iq_idx = idx; } /* for all CPUs */ } /* For all ports */ hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; rv = csio_create_queues(hw); if (rv != 0) goto intr_disable; /* * Now request IRQs for the vectors. In the event of a failure, * cleanup is handled internally by this function. */ rv = csio_request_irqs(hw); if (rv != 0) return -EINVAL; return 0; intr_disable: csio_intr_disable(hw, false); return -EINVAL; } static int csio_resource_alloc(struct csio_hw *hw) { struct csio_wrm *wrm = csio_hw_to_wrm(hw); int rv = -ENOMEM; wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, sizeof(struct csio_mb)); if (!hw->mb_mempool) goto err; hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, sizeof(struct csio_rnode)); if (!hw->rnode_mempool) goto err_free_mb_mempool; hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, CSIO_SCSI_RSP_LEN, 8, 0); if (!hw->scsi_pci_pool) goto err_free_rn_pool; return 0; err_free_rn_pool: mempool_destroy(hw->rnode_mempool); hw->rnode_mempool = NULL; err_free_mb_mempool: mempool_destroy(hw->mb_mempool); hw->mb_mempool = NULL; err: return rv; } static void csio_resource_free(struct csio_hw *hw) { pci_pool_destroy(hw->scsi_pci_pool); hw->scsi_pci_pool = NULL; mempool_destroy(hw->rnode_mempool); hw->rnode_mempool = NULL; mempool_destroy(hw->mb_mempool); hw->mb_mempool = NULL; } /* * csio_hw_alloc - Allocate and initialize the HW module. * @pdev: PCI device. * * Allocates HW structure, DMA, memory resources, maps BARS to * host memory and initializes HW module. */ static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) { struct csio_hw *hw; hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); if (!hw) goto err; hw->pdev = pdev; strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); /* memory pool/DMA pool allocation */ if (csio_resource_alloc(hw)) goto err_free_hw; /* Get the start address of registers from BAR 0 */ hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); if (!hw->regstart) { csio_err(hw, "Could not map BAR 0, regstart = %p\n", hw->regstart); goto err_resource_free; } csio_hw_init_workers(hw); if (csio_hw_init(hw)) goto err_unmap_bar; csio_dfs_create(hw); csio_dbg(hw, "hw:%p\n", hw); return hw; err_unmap_bar: csio_hw_exit_workers(hw); iounmap(hw->regstart); err_resource_free: csio_resource_free(hw); err_free_hw: kfree(hw); err: return NULL; } /* * csio_hw_free - Uninitialize and free the HW module. * @hw: The HW module * * Disable interrupts, uninit the HW module, free resources, free hw. */ static void csio_hw_free(struct csio_hw *hw) { csio_intr_disable(hw, true); csio_hw_exit_workers(hw); csio_hw_exit(hw); iounmap(hw->regstart); csio_dfs_destroy(hw); csio_resource_free(hw); kfree(hw); } /** * csio_shost_init - Create and initialize the lnode module. * @hw: The HW module. * @dev: The device associated with this invocation. * @probe: Called from probe context or not? * @os_pln: Parent lnode if any. * * Allocates lnode structure via scsi_host_alloc, initializes * shost, initializes lnode module and registers with SCSI ML * via scsi_host_add. This function is shared between physical and * virtual node ports. */ struct csio_lnode * csio_shost_init(struct csio_hw *hw, struct device *dev, bool probe, struct csio_lnode *pln) { struct Scsi_Host *shost = NULL; struct csio_lnode *ln; csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; /* * hw->pdev is the physical port's PCI dev structure, * which will be different from the NPIV dev structure. */ if (dev == &hw->pdev->dev) shost = scsi_host_alloc( &csio_fcoe_shost_template, sizeof(struct csio_lnode)); else shost = scsi_host_alloc( &csio_fcoe_shost_vport_template, sizeof(struct csio_lnode)); if (!shost) goto err; ln = shost_priv(shost); memset(ln, 0, sizeof(struct csio_lnode)); /* Link common lnode to this lnode */ ln->dev_num = (shost->host_no << 16); shost->can_queue = CSIO_MAX_QUEUE; shost->this_id = -1; shost->unique_id = shost->host_no; shost->max_cmd_len = 16; /* Max CDB length supported */ shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, hw->fres_info.max_ssns); shost->max_lun = CSIO_MAX_LUN; if (dev == &hw->pdev->dev) shost->transportt = csio_fcoe_transport; else shost->transportt = csio_fcoe_transport_vport; /* root lnode */ if (!hw->rln) hw->rln = ln; /* Other initialization here: Common, Transport specific */ if (csio_lnode_init(ln, hw, pln)) goto err_shost_put; if (scsi_add_host(shost, dev)) goto err_lnode_exit; return ln; err_lnode_exit: csio_lnode_exit(ln); err_shost_put: scsi_host_put(shost); err: return NULL; } /** * csio_shost_exit - De-instantiate the shost. * @ln: The lnode module corresponding to the shost. * */ void csio_shost_exit(struct csio_lnode *ln) { struct Scsi_Host *shost = csio_ln_to_shost(ln); struct csio_hw *hw = csio_lnode_to_hw(ln); /* Inform transport */ fc_remove_host(shost); /* Inform SCSI ML */ scsi_remove_host(shost); /* Flush all the events, so that any rnode removal events * already queued are all handled, before we remove the lnode. */ spin_lock_irq(&hw->lock); csio_evtq_flush(hw); spin_unlock_irq(&hw->lock); csio_lnode_exit(ln); scsi_host_put(shost); } struct csio_lnode * csio_lnode_alloc(struct csio_hw *hw) { return csio_shost_init(hw, &hw->pdev->dev, false, NULL); } void csio_lnodes_block_request(struct csio_hw *hw) { struct Scsi_Host *shost; struct csio_lnode *sln; struct csio_lnode *ln; struct list_head *cur_ln, *cur_cln; struct csio_lnode **lnode_list; int cur_cnt = 0, ii; lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), GFP_KERNEL); if (!lnode_list) { csio_err(hw, "Failed to allocate lnodes_list"); return; } spin_lock_irq(&hw->lock); /* Traverse sibling lnodes */ list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; lnode_list[cur_cnt++] = sln; /* Traverse children lnodes */ list_for_each(cur_cln, &sln->cln_head) lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; } spin_unlock_irq(&hw->lock); for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); ln = lnode_list[ii]; shost = csio_ln_to_shost(ln); scsi_block_requests(shost); } kfree(lnode_list); } void csio_lnodes_unblock_request(struct csio_hw *hw) { struct csio_lnode *ln; struct Scsi_Host *shost; struct csio_lnode *sln; struct list_head *cur_ln, *cur_cln; struct csio_lnode **lnode_list; int cur_cnt = 0, ii; lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), GFP_KERNEL); if (!lnode_list) { csio_err(hw, "Failed to allocate lnodes_list"); return; } spin_lock_irq(&hw->lock); /* Traverse sibling lnodes */ list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; lnode_list[cur_cnt++] = sln; /* Traverse children lnodes */ list_for_each(cur_cln, &sln->cln_head) lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; } spin_unlock_irq(&hw->lock); for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); ln = lnode_list[ii]; shost = csio_ln_to_shost(ln); scsi_unblock_requests(shost); } kfree(lnode_list); } void csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) { struct csio_lnode *ln; struct Scsi_Host *shost; struct csio_lnode *sln; struct list_head *cur_ln, *cur_cln; struct csio_lnode **lnode_list; int cur_cnt = 0, ii; lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), GFP_KERNEL); if (!lnode_list) { csio_err(hw, "Failed to allocate lnodes_list"); return; } spin_lock_irq(&hw->lock); /* Traverse sibling lnodes */ list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; if (sln->portid != portid) continue; lnode_list[cur_cnt++] = sln; /* Traverse children lnodes */ list_for_each(cur_cln, &sln->cln_head) lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; } spin_unlock_irq(&hw->lock); for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); ln = lnode_list[ii]; shost = csio_ln_to_shost(ln); scsi_block_requests(shost); } kfree(lnode_list); } void csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) { struct csio_lnode *ln; struct Scsi_Host *shost; struct csio_lnode *sln; struct list_head *cur_ln, *cur_cln; struct csio_lnode **lnode_list; int cur_cnt = 0, ii; lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), GFP_KERNEL); if (!lnode_list) { csio_err(hw, "Failed to allocate lnodes_list"); return; } spin_lock_irq(&hw->lock); /* Traverse sibling lnodes */ list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; if (sln->portid != portid) continue; lnode_list[cur_cnt++] = sln; /* Traverse children lnodes */ list_for_each(cur_cln, &sln->cln_head) lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; } spin_unlock_irq(&hw->lock); for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); ln = lnode_list[ii]; shost = csio_ln_to_shost(ln); scsi_unblock_requests(shost); } kfree(lnode_list); } void csio_lnodes_exit(struct csio_hw *hw, bool npiv) { struct csio_lnode *sln; struct csio_lnode *ln; struct list_head *cur_ln, *cur_cln; struct csio_lnode **lnode_list; int cur_cnt = 0, ii; lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), GFP_KERNEL); if (!lnode_list) { csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); return; } /* Get all child lnodes(NPIV ports) */ spin_lock_irq(&hw->lock); list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; /* Traverse children lnodes */ list_for_each(cur_cln, &sln->cln_head) lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; } spin_unlock_irq(&hw->lock); /* Delete NPIV lnodes */ for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); ln = lnode_list[ii]; fc_vport_terminate(ln->fc_vport); } /* Delete only npiv lnodes */ if (npiv) goto free_lnodes; cur_cnt = 0; /* Get all physical lnodes */ spin_lock_irq(&hw->lock); /* Traverse sibling lnodes */ list_for_each(cur_ln, &hw->sln_head) { sln = (struct csio_lnode *) cur_ln; lnode_list[cur_cnt++] = sln; } spin_unlock_irq(&hw->lock); /* Delete physical lnodes */ for (ii = 0; ii < cur_cnt; ii++) { csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); csio_shost_exit(lnode_list[ii]); } free_lnodes: kfree(lnode_list); } /* * csio_lnode_init_post: Set lnode attributes after starting HW. * @ln: lnode. * */ static void csio_lnode_init_post(struct csio_lnode *ln) { struct Scsi_Host *shost = csio_ln_to_shost(ln); csio_fchost_attr_init(ln); scsi_scan_host(shost); } /* * csio_probe_one - Instantiate this function. * @pdev: PCI device * @id: Device ID * * This is the .probe() callback of the driver. This function: * - Initializes the PCI function by enabling MMIO, setting bus * mastership and setting DMA mask. * - Allocates HW structure, DMA, memory resources, maps BARS to * host memory and initializes HW module. * - Allocates lnode structure via scsi_host_alloc, initializes * shost, initialized lnode module and registers with SCSI ML * via scsi_host_add. * - Enables interrupts, and starts the chip by kicking off the * HW state machine. * - Once hardware is ready, initiated scan of the host via * scsi_scan_host. */ static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) { int rv; int bars; int i; struct csio_hw *hw; struct csio_lnode *ln; /* probe only T5 cards */ if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK))) return -ENODEV; rv = csio_pci_init(pdev, &bars); if (rv) goto err; hw = csio_hw_alloc(pdev); if (!hw) { rv = -ENODEV; goto err_pci_exit; } pci_set_drvdata(pdev, hw); if (csio_hw_start(hw) != 0) { dev_err(&pdev->dev, "Failed to start FW, continuing in debug mode.\n"); return 0; } sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", FW_HDR_FW_VER_MAJOR_G(hw->fwrev), FW_HDR_FW_VER_MINOR_G(hw->fwrev), FW_HDR_FW_VER_MICRO_G(hw->fwrev), FW_HDR_FW_VER_BUILD_G(hw->fwrev)); for (i = 0; i < hw->num_pports; i++) { ln = csio_shost_init(hw, &pdev->dev, true, NULL); if (!ln) { rv = -ENODEV; break; } /* Initialize portid */ ln->portid = hw->pport[i].portid; spin_lock_irq(&hw->lock); if (csio_lnode_start(ln) != 0) rv = -ENODEV; spin_unlock_irq(&hw->lock); if (rv) break; csio_lnode_init_post(ln); } if (rv) goto err_lnode_exit; return 0; err_lnode_exit: csio_lnodes_block_request(hw); spin_lock_irq(&hw->lock); csio_hw_stop(hw); spin_unlock_irq(&hw->lock); csio_lnodes_unblock_request(hw); csio_lnodes_exit(hw, 0); csio_hw_free(hw); err_pci_exit: csio_pci_exit(pdev, &bars); err: dev_err(&pdev->dev, "probe of device failed: %d\n", rv); return rv; } /* * csio_remove_one - Remove one instance of the driver at this PCI function. * @pdev: PCI device * * Used during hotplug operation. */ static void csio_remove_one(struct pci_dev *pdev) { struct csio_hw *hw = pci_get_drvdata(pdev); int bars = pci_select_bars(pdev, IORESOURCE_MEM); csio_lnodes_block_request(hw); spin_lock_irq(&hw->lock); /* Stops lnode, Rnode s/m * Quiesce IOs. * All sessions with remote ports are unregistered. */ csio_hw_stop(hw); spin_unlock_irq(&hw->lock); csio_lnodes_unblock_request(hw); csio_lnodes_exit(hw, 0); csio_hw_free(hw); csio_pci_exit(pdev, &bars); } /* * csio_pci_error_detected - PCI error was detected * @pdev: PCI device * */ static pci_ers_result_t csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) { struct csio_hw *hw = pci_get_drvdata(pdev); csio_lnodes_block_request(hw); spin_lock_irq(&hw->lock); /* Post PCI error detected evt to HW s/m * HW s/m handles this evt by quiescing IOs, unregisters rports * and finally takes the device to offline. */ csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); spin_unlock_irq(&hw->lock); csio_lnodes_unblock_request(hw); csio_lnodes_exit(hw, 0); csio_intr_disable(hw, true); pci_disable_device(pdev); return state == pci_channel_io_perm_failure ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; } /* * csio_pci_slot_reset - PCI slot has been reset. * @pdev: PCI device * */ static pci_ers_result_t csio_pci_slot_reset(struct pci_dev *pdev) { struct csio_hw *hw = pci_get_drvdata(pdev); int ready; if (pci_enable_device(pdev)) { dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); return PCI_ERS_RESULT_DISCONNECT; } pci_set_master(pdev); pci_restore_state(pdev); pci_save_state(pdev); pci_cleanup_aer_uncorrect_error_status(pdev); /* Bring HW s/m to ready state. * but don't resume IOs. */ spin_lock_irq(&hw->lock); csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); ready = csio_is_hw_ready(hw); spin_unlock_irq(&hw->lock); if (ready) { return PCI_ERS_RESULT_RECOVERED; } else { dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); return PCI_ERS_RESULT_DISCONNECT; } } /* * csio_pci_resume - Resume normal operations * @pdev: PCI device * */ static void csio_pci_resume(struct pci_dev *pdev) { struct csio_hw *hw = pci_get_drvdata(pdev); struct csio_lnode *ln; int rv = 0; int i; /* Bring the LINK UP and Resume IO */ for (i = 0; i < hw->num_pports; i++) { ln = csio_shost_init(hw, &pdev->dev, true, NULL); if (!ln) { rv = -ENODEV; break; } /* Initialize portid */ ln->portid = hw->pport[i].portid; spin_lock_irq(&hw->lock); if (csio_lnode_start(ln) != 0) rv = -ENODEV; spin_unlock_irq(&hw->lock); if (rv) break; csio_lnode_init_post(ln); } if (rv) goto err_resume_exit; return; err_resume_exit: csio_lnodes_block_request(hw); spin_lock_irq(&hw->lock); csio_hw_stop(hw); spin_unlock_irq(&hw->lock); csio_lnodes_unblock_request(hw); csio_lnodes_exit(hw, 0); csio_hw_free(hw); dev_err(&pdev->dev, "resume of device failed: %d\n", rv); } static struct pci_error_handlers csio_err_handler = { .error_detected = csio_pci_error_detected, .slot_reset = csio_pci_slot_reset, .resume = csio_pci_resume, }; /* * Macros needed to support the PCI Device ID Table ... */ #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ static struct pci_device_id csio_pci_tbl[] = { /* Define for FCoE uses PF6 */ #define CH_PCI_DEVICE_ID_FUNCTION 0x6 #define CH_PCI_ID_TABLE_ENTRY(devid) \ { PCI_VDEVICE(CHELSIO, (devid)), 0 } #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } #include "t4_pci_id_tbl.h" static struct pci_driver csio_pci_driver = { .name = KBUILD_MODNAME, .driver = { .owner = THIS_MODULE, }, .id_table = csio_pci_tbl, .probe = csio_probe_one, .remove = csio_remove_one, .err_handler = &csio_err_handler, }; /* * csio_init - Chelsio storage driver initialization function. * */ static int __init csio_init(void) { int rv = -ENOMEM; pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); csio_dfs_init(); csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); if (!csio_fcoe_transport) goto err; csio_fcoe_transport_vport = fc_attach_transport(&csio_fc_transport_vport_funcs); if (!csio_fcoe_transport_vport) goto err_vport; rv = pci_register_driver(&csio_pci_driver); if (rv) goto err_pci; return 0; err_pci: fc_release_transport(csio_fcoe_transport_vport); err_vport: fc_release_transport(csio_fcoe_transport); err: csio_dfs_exit(); return rv; } /* * csio_exit - Chelsio storage driver uninitialization . * * Function that gets called in the unload path. */ static void __exit csio_exit(void) { pci_unregister_driver(&csio_pci_driver); csio_dfs_exit(); fc_release_transport(csio_fcoe_transport_vport); fc_release_transport(csio_fcoe_transport); } module_init(csio_init); module_exit(csio_exit); MODULE_AUTHOR(CSIO_DRV_AUTHOR); MODULE_DESCRIPTION(CSIO_DRV_DESC); MODULE_LICENSE(CSIO_DRV_LICENSE); MODULE_DEVICE_TABLE(pci, csio_pci_tbl); MODULE_VERSION(CSIO_DRV_VERSION); MODULE_FIRMWARE(FW_FNAME_T5);