| /* |
| * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters |
| * |
| * Written By: PMC Sierra Corporation |
| * |
| * Copyright (C) 2008, 2009 PMC Sierra Inc |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, |
| * USA |
| * |
| */ |
| #include <linux/fs.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/ioport.h> |
| #include <linux/delay.h> |
| #include <linux/pci.h> |
| #include <linux/wait.h> |
| #include <linux/spinlock.h> |
| #include <linux/sched.h> |
| #include <linux/interrupt.h> |
| #include <linux/blkdev.h> |
| #include <linux/firmware.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/hdreg.h> |
| #include <linux/version.h> |
| #include <linux/io.h> |
| #include <asm/irq.h> |
| #include <asm/processor.h> |
| #include <linux/libata.h> |
| #include <linux/mutex.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsicam.h> |
| |
| #include "pmcraid.h" |
| |
| /* |
| * Module configuration parameters |
| */ |
| static unsigned int pmcraid_debug_log; |
| static unsigned int pmcraid_disable_aen; |
| static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; |
| |
| /* |
| * Data structures to support multiple adapters by the LLD. |
| * pmcraid_adapter_count - count of configured adapters |
| */ |
| static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0); |
| |
| /* |
| * Supporting user-level control interface through IOCTL commands. |
| * pmcraid_major - major number to use |
| * pmcraid_minor - minor number(s) to use |
| */ |
| static unsigned int pmcraid_major; |
| static struct class *pmcraid_class; |
| DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS); |
| |
| /* |
| * Module parameters |
| */ |
| MODULE_AUTHOR("PMC Sierra Corporation, anil_ravindranath@pmc-sierra.com"); |
| MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(PMCRAID_DRIVER_VERSION); |
| |
| module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR)); |
| MODULE_PARM_DESC(log_level, |
| "Enables firmware error code logging, default :1 high-severity" |
| " errors, 2: all errors including high-severity errors," |
| " 0: disables logging"); |
| |
| module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR)); |
| MODULE_PARM_DESC(debug, |
| "Enable driver verbose message logging. Set 1 to enable." |
| "(default: 0)"); |
| |
| module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR)); |
| MODULE_PARM_DESC(disable_aen, |
| "Disable driver aen notifications to apps. Set 1 to disable." |
| "(default: 0)"); |
| |
| /* chip specific constants for PMC MaxRAID controllers (same for |
| * 0x5220 and 0x8010 |
| */ |
| static struct pmcraid_chip_details pmcraid_chip_cfg[] = { |
| { |
| .ioastatus = 0x0, |
| .ioarrin = 0x00040, |
| .mailbox = 0x7FC30, |
| .global_intr_mask = 0x00034, |
| .ioa_host_intr = 0x0009C, |
| .ioa_host_intr_clr = 0x000A0, |
| .ioa_host_mask = 0x7FC28, |
| .ioa_host_mask_clr = 0x7FC28, |
| .host_ioa_intr = 0x00020, |
| .host_ioa_intr_clr = 0x00020, |
| .transop_timeout = 300 |
| } |
| }; |
| |
| /* |
| * PCI device ids supported by pmcraid driver |
| */ |
| static struct pci_device_id pmcraid_pci_table[] __devinitdata = { |
| { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID), |
| 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0] |
| }, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, pmcraid_pci_table); |
| |
| |
| |
| /** |
| * pmcraid_slave_alloc - Prepare for commands to a device |
| * @scsi_dev: scsi device struct |
| * |
| * This function is called by mid-layer prior to sending any command to the new |
| * device. Stores resource entry details of the device in scsi_device struct. |
| * Queuecommand uses the resource handle and other details to fill up IOARCB |
| * while sending commands to the device. |
| * |
| * Return value: |
| * 0 on success / -ENXIO if device does not exist |
| */ |
| static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) |
| { |
| struct pmcraid_resource_entry *temp, *res = NULL; |
| struct pmcraid_instance *pinstance; |
| u8 target, bus, lun; |
| unsigned long lock_flags; |
| int rc = -ENXIO; |
| pinstance = shost_priv(scsi_dev->host); |
| |
| /* Driver exposes VSET and GSCSI resources only; all other device types |
| * are not exposed. Resource list is synchronized using resource lock |
| * so any traversal or modifications to the list should be done inside |
| * this lock |
| */ |
| spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| list_for_each_entry(temp, &pinstance->used_res_q, queue) { |
| |
| /* do not expose VSETs with order-ids >= 240 */ |
| if (RES_IS_VSET(temp->cfg_entry)) { |
| target = temp->cfg_entry.unique_flags1; |
| if (target >= PMCRAID_MAX_VSET_TARGETS) |
| continue; |
| bus = PMCRAID_VSET_BUS_ID; |
| lun = 0; |
| } else if (RES_IS_GSCSI(temp->cfg_entry)) { |
| target = RES_TARGET(temp->cfg_entry.resource_address); |
| bus = PMCRAID_PHYS_BUS_ID; |
| lun = RES_LUN(temp->cfg_entry.resource_address); |
| } else { |
| continue; |
| } |
| |
| if (bus == scsi_dev->channel && |
| target == scsi_dev->id && |
| lun == scsi_dev->lun) { |
| res = temp; |
| break; |
| } |
| } |
| |
| if (res) { |
| res->scsi_dev = scsi_dev; |
| scsi_dev->hostdata = res; |
| res->change_detected = 0; |
| atomic_set(&res->read_failures, 0); |
| atomic_set(&res->write_failures, 0); |
| rc = 0; |
| } |
| spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| return rc; |
| } |
| |
| /** |
| * pmcraid_slave_configure - Configures a SCSI device |
| * @scsi_dev: scsi device struct |
| * |
| * This fucntion is executed by SCSI mid layer just after a device is first |
| * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the |
| * timeout value (default 30s) will be over-written to a higher value (60s) |
| * and max_sectors value will be over-written to 512. It also sets queue depth |
| * to host->cmd_per_lun value |
| * |
| * Return value: |
| * 0 on success |
| */ |
| static int pmcraid_slave_configure(struct scsi_device *scsi_dev) |
| { |
| struct pmcraid_resource_entry *res = scsi_dev->hostdata; |
| |
| if (!res) |
| return 0; |
| |
| /* LLD exposes VSETs and Enclosure devices only */ |
| if (RES_IS_GSCSI(res->cfg_entry) && |
| scsi_dev->type != TYPE_ENCLOSURE) |
| return -ENXIO; |
| |
| pmcraid_info("configuring %x:%x:%x:%x\n", |
| scsi_dev->host->unique_id, |
| scsi_dev->channel, |
| scsi_dev->id, |
| scsi_dev->lun); |
| |
| if (RES_IS_GSCSI(res->cfg_entry)) { |
| scsi_dev->allow_restart = 1; |
| } else if (RES_IS_VSET(res->cfg_entry)) { |
| scsi_dev->allow_restart = 1; |
| blk_queue_rq_timeout(scsi_dev->request_queue, |
| PMCRAID_VSET_IO_TIMEOUT); |
| blk_queue_max_sectors(scsi_dev->request_queue, |
| PMCRAID_VSET_MAX_SECTORS); |
| } |
| |
| if (scsi_dev->tagged_supported && |
| (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
| scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
| scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG, |
| scsi_dev->host->cmd_per_lun); |
| } else { |
| scsi_adjust_queue_depth(scsi_dev, 0, |
| scsi_dev->host->cmd_per_lun); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it |
| * |
| * @scsi_dev: scsi device struct |
| * |
| * This is called by mid-layer before removing a device. Pointer assignments |
| * done in pmcraid_slave_alloc will be reset to NULL here. |
| * |
| * Return value |
| * none |
| */ |
| static void pmcraid_slave_destroy(struct scsi_device *scsi_dev) |
| { |
| struct pmcraid_resource_entry *res; |
| |
| res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
| |
| if (res) |
| res->scsi_dev = NULL; |
| |
| scsi_dev->hostdata = NULL; |
| } |
| |
| /** |
| * pmcraid_change_queue_depth - Change the device's queue depth |
| * @scsi_dev: scsi device struct |
| * @depth: depth to set |
| * |
| * Return value |
| * actual depth set |
| */ |
| static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth) |
| { |
| if (depth > PMCRAID_MAX_CMD_PER_LUN) |
| depth = PMCRAID_MAX_CMD_PER_LUN; |
| |
| scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth); |
| |
| return scsi_dev->queue_depth; |
| } |
| |
| /** |
| * pmcraid_change_queue_type - Change the device's queue type |
| * @scsi_dev: scsi device struct |
| * @tag: type of tags to use |
| * |
| * Return value: |
| * actual queue type set |
| */ |
| static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag) |
| { |
| struct pmcraid_resource_entry *res; |
| |
| res = (struct pmcraid_resource_entry *)scsi_dev->hostdata; |
| |
| if ((res) && scsi_dev->tagged_supported && |
| (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) { |
| scsi_set_tag_type(scsi_dev, tag); |
| |
| if (tag) |
| scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth); |
| else |
| scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth); |
| } else |
| tag = 0; |
| |
| return tag; |
| } |
| |
| |
| /** |
| * pmcraid_init_cmdblk - initializes a command block |
| * |
| * @cmd: pointer to struct pmcraid_cmd to be initialized |
| * @index: if >=0 first time initialization; otherwise reinitialization |
| * |
| * Return Value |
| * None |
| */ |
| void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index) |
| { |
| struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
| dma_addr_t dma_addr = cmd->ioa_cb_bus_addr; |
| |
| if (index >= 0) { |
| /* first time initialization (called from probe) */ |
| u32 ioasa_offset = |
| offsetof(struct pmcraid_control_block, ioasa); |
| |
| cmd->index = index; |
| ioarcb->response_handle = cpu_to_le32(index << 2); |
| ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr); |
| ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset); |
| ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa)); |
| } else { |
| /* re-initialization of various lengths, called once command is |
| * processed by IOA |
| */ |
| memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN); |
| ioarcb->request_flags0 = 0; |
| ioarcb->request_flags1 = 0; |
| ioarcb->cmd_timeout = 0; |
| ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
| ioarcb->ioadl_bus_addr = 0; |
| ioarcb->ioadl_length = 0; |
| ioarcb->data_transfer_length = 0; |
| ioarcb->add_cmd_param_length = 0; |
| ioarcb->add_cmd_param_offset = 0; |
| cmd->ioa_cb->ioasa.ioasc = 0; |
| cmd->ioa_cb->ioasa.residual_data_length = 0; |
| cmd->u.time_left = 0; |
| } |
| |
| cmd->cmd_done = NULL; |
| cmd->scsi_cmd = NULL; |
| cmd->release = 0; |
| cmd->completion_req = 0; |
| cmd->dma_handle = 0; |
| init_timer(&cmd->timer); |
| } |
| |
| /** |
| * pmcraid_reinit_cmdblk - reinitialize a command block |
| * |
| * @cmd: pointer to struct pmcraid_cmd to be reinitialized |
| * |
| * Return Value |
| * None |
| */ |
| static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_init_cmdblk(cmd, -1); |
| } |
| |
| /** |
| * pmcraid_get_free_cmd - get a free cmd block from command block pool |
| * @pinstance: adapter instance structure |
| * |
| * Return Value: |
| * returns pointer to cmd block or NULL if no blocks are available |
| */ |
| static struct pmcraid_cmd *pmcraid_get_free_cmd( |
| struct pmcraid_instance *pinstance |
| ) |
| { |
| struct pmcraid_cmd *cmd = NULL; |
| unsigned long lock_flags; |
| |
| /* free cmd block list is protected by free_pool_lock */ |
| spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
| |
| if (!list_empty(&pinstance->free_cmd_pool)) { |
| cmd = list_entry(pinstance->free_cmd_pool.next, |
| struct pmcraid_cmd, free_list); |
| list_del(&cmd->free_list); |
| } |
| spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
| |
| /* Initialize the command block before giving it the caller */ |
| if (cmd != NULL) |
| pmcraid_reinit_cmdblk(cmd); |
| return cmd; |
| } |
| |
| /** |
| * pmcraid_return_cmd - return a completed command block back into free pool |
| * @cmd: pointer to the command block |
| * |
| * Return Value: |
| * nothing |
| */ |
| void pmcraid_return_cmd(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| unsigned long lock_flags; |
| |
| spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags); |
| list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool); |
| spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags); |
| } |
| |
| /** |
| * pmcraid_read_interrupts - reads IOA interrupts |
| * |
| * @pinstance: pointer to adapter instance structure |
| * |
| * Return value |
| * interrupts read from IOA |
| */ |
| static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance) |
| { |
| return ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
| } |
| |
| /** |
| * pmcraid_disable_interrupts - Masks and clears all specified interrupts |
| * |
| * @pinstance: pointer to per adapter instance structure |
| * @intrs: interrupts to disable |
| * |
| * Return Value |
| * None |
| */ |
| static void pmcraid_disable_interrupts( |
| struct pmcraid_instance *pinstance, |
| u32 intrs |
| ) |
| { |
| u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
| u32 nmask = gmask | GLOBAL_INTERRUPT_MASK; |
| |
| iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
| iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| } |
| |
| /** |
| * pmcraid_enable_interrupts - Enables specified interrupts |
| * |
| * @pinstance: pointer to per adapter instance structure |
| * @intr: interrupts to enable |
| * |
| * Return Value |
| * None |
| */ |
| static void pmcraid_enable_interrupts( |
| struct pmcraid_instance *pinstance, |
| u32 intrs |
| ) |
| { |
| u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg); |
| u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK); |
| |
| iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg); |
| iowrite32(~intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| |
| pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n", |
| ioread32(pinstance->int_regs.global_interrupt_mask_reg), |
| ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg)); |
| } |
| |
| /** |
| * pmcraid_reset_type - Determine the required reset type |
| * @pinstance: pointer to adapter instance structure |
| * |
| * IOA requires hard reset if any of the following conditions is true. |
| * 1. If HRRQ valid interrupt is not masked |
| * 2. IOA reset alert doorbell is set |
| * 3. If there are any error interrupts |
| */ |
| static void pmcraid_reset_type(struct pmcraid_instance *pinstance) |
| { |
| u32 mask; |
| u32 intrs; |
| u32 alerts; |
| |
| mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
| alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| |
| if ((mask & INTRS_HRRQ_VALID) == 0 || |
| (alerts & DOORBELL_IOA_RESET_ALERT) || |
| (intrs & PMCRAID_ERROR_INTERRUPTS)) { |
| pmcraid_info("IOA requires hard reset\n"); |
| pinstance->ioa_hard_reset = 1; |
| } |
| |
| /* If unit check is active, trigger the dump */ |
| if (intrs & INTRS_IOA_UNIT_CHECK) |
| pinstance->ioa_unit_check = 1; |
| } |
| |
| /** |
| * pmcraid_bist_done - completion function for PCI BIST |
| * @cmd: pointer to reset command |
| * Return Value |
| * none |
| */ |
| |
| static void pmcraid_ioa_reset(struct pmcraid_cmd *); |
| |
| static void pmcraid_bist_done(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| unsigned long lock_flags; |
| int rc; |
| u16 pci_reg; |
| |
| rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
| |
| /* If PCI config space can't be accessed wait for another two secs */ |
| if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) && |
| cmd->u.time_left > 0) { |
| pmcraid_info("BIST not complete, waiting another 2 secs\n"); |
| cmd->timer.expires = jiffies + cmd->u.time_left; |
| cmd->u.time_left = 0; |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.function = |
| (void (*)(unsigned long))pmcraid_bist_done; |
| add_timer(&cmd->timer); |
| } else { |
| cmd->u.time_left = 0; |
| pmcraid_info("BIST is complete, proceeding with reset\n"); |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| pmcraid_ioa_reset(cmd); |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| } |
| } |
| |
| /** |
| * pmcraid_start_bist - starts BIST |
| * @cmd: pointer to reset cmd |
| * Return Value |
| * none |
| */ |
| static void pmcraid_start_bist(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 doorbells, intrs; |
| |
| /* proceed with bist and wait for 2 seconds */ |
| iowrite32(DOORBELL_IOA_START_BIST, |
| pinstance->int_regs.host_ioa_interrupt_reg); |
| doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
| pmcraid_info("doorbells after start bist: %x intrs: %x \n", |
| doorbells, intrs); |
| |
| cmd->u.time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT); |
| cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done; |
| add_timer(&cmd->timer); |
| } |
| |
| /** |
| * pmcraid_reset_alert_done - completion routine for reset_alert |
| * @cmd: pointer to command block used in reset sequence |
| * Return value |
| * None |
| */ |
| static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 status = ioread32(pinstance->ioa_status); |
| unsigned long lock_flags; |
| |
| /* if the critical operation in progress bit is set or the wait times |
| * out, invoke reset engine to proceed with hard reset. If there is |
| * some more time to wait, restart the timer |
| */ |
| if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) || |
| cmd->u.time_left <= 0) { |
| pmcraid_info("critical op is reset proceeding with reset\n"); |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| pmcraid_ioa_reset(cmd); |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| } else { |
| pmcraid_info("critical op is not yet reset waiting again\n"); |
| /* restart timer if some more time is available to wait */ |
| cmd->u.time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
| cmd->timer.function = |
| (void (*)(unsigned long))pmcraid_reset_alert_done; |
| add_timer(&cmd->timer); |
| } |
| } |
| |
| /** |
| * pmcraid_reset_alert - alerts IOA for a possible reset |
| * @cmd : command block to be used for reset sequence. |
| * |
| * Return Value |
| * returns 0 if pci config-space is accessible and RESET_DOORBELL is |
| * successfully written to IOA. Returns non-zero in case pci_config_space |
| * is not accessible |
| */ |
| static void pmcraid_reset_alert(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 doorbells; |
| int rc; |
| u16 pci_reg; |
| |
| /* If we are able to access IOA PCI config space, alert IOA that we are |
| * going to reset it soon. This enables IOA to preserv persistent error |
| * data if any. In case memory space is not accessible, proceed with |
| * BIST or slot_reset |
| */ |
| rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg); |
| if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) { |
| |
| /* wait for IOA permission i.e until CRITICAL_OPERATION bit is |
| * reset IOA doesn't generate any interrupts when CRITICAL |
| * OPERATION bit is reset. A timer is started to wait for this |
| * bit to be reset. |
| */ |
| cmd->u.time_left = PMCRAID_RESET_TIMEOUT; |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT; |
| cmd->timer.function = |
| (void (*)(unsigned long))pmcraid_reset_alert_done; |
| add_timer(&cmd->timer); |
| |
| iowrite32(DOORBELL_IOA_RESET_ALERT, |
| pinstance->int_regs.host_ioa_interrupt_reg); |
| doorbells = |
| ioread32(pinstance->int_regs.host_ioa_interrupt_reg); |
| pmcraid_info("doorbells after reset alert: %x\n", doorbells); |
| } else { |
| pmcraid_info("PCI config is not accessible starting BIST\n"); |
| pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
| pmcraid_start_bist(cmd); |
| } |
| } |
| |
| /** |
| * pmcraid_timeout_handler - Timeout handler for internally generated ops |
| * |
| * @cmd : pointer to command structure, that got timedout |
| * |
| * This function blocks host requests and initiates an adapter reset. |
| * |
| * Return value: |
| * None |
| */ |
| static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| unsigned long lock_flags; |
| |
| dev_info(&pinstance->pdev->dev, |
| "Adapter being reset due to command timeout.\n"); |
| |
| /* Command timeouts result in hard reset sequence. The command that got |
| * timed out may be the one used as part of reset sequence. In this |
| * case restart reset sequence using the same command block even if |
| * reset is in progress. Otherwise fail this command and get a free |
| * command block to restart the reset sequence. |
| */ |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| if (!pinstance->ioa_reset_in_progress) { |
| pinstance->ioa_reset_attempts = 0; |
| cmd = pmcraid_get_free_cmd(pinstance); |
| |
| /* If we are out of command blocks, just return here itself. |
| * Some other command's timeout handler can do the reset job |
| */ |
| if (cmd == NULL) { |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| lock_flags); |
| pmcraid_err("no free cmnd block for timeout handler\n"); |
| return; |
| } |
| |
| pinstance->reset_cmd = cmd; |
| pinstance->ioa_reset_in_progress = 1; |
| } else { |
| pmcraid_info("reset is already in progress\n"); |
| |
| if (pinstance->reset_cmd != cmd) { |
| /* This command should have been given to IOA, this |
| * command will be completed by fail_outstanding_cmds |
| * anyway |
| */ |
| pmcraid_err("cmd is pending but reset in progress\n"); |
| } |
| |
| /* If this command was being used as part of the reset |
| * sequence, set cmd_done pointer to pmcraid_ioa_reset. This |
| * causes fail_outstanding_commands not to return the command |
| * block back to free pool |
| */ |
| if (cmd == pinstance->reset_cmd) |
| cmd->cmd_done = pmcraid_ioa_reset; |
| |
| } |
| |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| scsi_block_requests(pinstance->host); |
| pmcraid_reset_alert(cmd); |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| } |
| |
| /** |
| * pmcraid_internal_done - completion routine for internally generated cmds |
| * |
| * @cmd: command that got response from IOA |
| * |
| * Return Value: |
| * none |
| */ |
| static void pmcraid_internal_done(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| |
| /* Some of the internal commands are sent with callers blocking for the |
| * response. Same will be indicated as part of cmd->completion_req |
| * field. Response path needs to wake up any waiters waiting for cmd |
| * completion if this flag is set. |
| */ |
| if (cmd->completion_req) { |
| cmd->completion_req = 0; |
| complete(&cmd->wait_for_completion); |
| } |
| |
| /* most of the internal commands are completed by caller itself, so |
| * no need to return the command block back to free pool until we are |
| * required to do so (e.g once done with initialization). |
| */ |
| if (cmd->release) { |
| cmd->release = 0; |
| pmcraid_return_cmd(cmd); |
| } |
| } |
| |
| /** |
| * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization |
| * |
| * @cmd: command that got response from IOA |
| * |
| * This routine is called after driver re-reads configuration table due to a |
| * lost CCN. It returns the command block back to free pool and schedules |
| * worker thread to add/delete devices into the system. |
| * |
| * Return Value: |
| * none |
| */ |
| static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| |
| if (cmd->release) { |
| cmd->release = 0; |
| pmcraid_return_cmd(cmd); |
| } |
| pmcraid_info("scheduling worker for config table reinitialization\n"); |
| schedule_work(&cmd->drv_inst->worker_q); |
| } |
| |
| /** |
| * pmcraid_erp_done - Process completion of SCSI error response from device |
| * @cmd: pmcraid_command |
| * |
| * This function copies the sense buffer into the scsi_cmd struct and completes |
| * scsi_cmd by calling scsi_done function. |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_erp_done(struct pmcraid_cmd *cmd) |
| { |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| |
| if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) { |
| scsi_cmd->result |= (DID_ERROR << 16); |
| scmd_printk(KERN_INFO, scsi_cmd, |
| "command CDB[0] = %x failed with IOASC: 0x%08X\n", |
| cmd->ioa_cb->ioarcb.cdb[0], ioasc); |
| } |
| |
| /* if we had allocated sense buffers for request sense, copy the sense |
| * release the buffers |
| */ |
| if (cmd->sense_buffer != NULL) { |
| memcpy(scsi_cmd->sense_buffer, |
| cmd->sense_buffer, |
| SCSI_SENSE_BUFFERSIZE); |
| pci_free_consistent(pinstance->pdev, |
| SCSI_SENSE_BUFFERSIZE, |
| cmd->sense_buffer, cmd->sense_buffer_dma); |
| cmd->sense_buffer = NULL; |
| cmd->sense_buffer_dma = 0; |
| } |
| |
| scsi_dma_unmap(scsi_cmd); |
| pmcraid_return_cmd(cmd); |
| scsi_cmd->scsi_done(scsi_cmd); |
| } |
| |
| /** |
| * pmcraid_fire_command - sends an IOA command to adapter |
| * |
| * This function adds the given block into pending command list |
| * and returns without waiting |
| * |
| * @cmd : command to be sent to the device |
| * |
| * Return Value |
| * None |
| */ |
| static void _pmcraid_fire_command(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| unsigned long lock_flags; |
| |
| /* Add this command block to pending cmd pool. We do this prior to |
| * writting IOARCB to ioarrin because IOA might complete the command |
| * by the time we are about to add it to the list. Response handler |
| * (isr/tasklet) looks for cmb block in the pending pending list. |
| */ |
| spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool); |
| spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
| atomic_inc(&pinstance->outstanding_cmds); |
| |
| /* driver writes lower 32-bit value of IOARCB address only */ |
| mb(); |
| iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), |
| pinstance->ioarrin); |
| } |
| |
| /** |
| * pmcraid_send_cmd - fires a command to IOA |
| * |
| * This function also sets up timeout function, and command completion |
| * function |
| * |
| * @cmd: pointer to the command block to be fired to IOA |
| * @cmd_done: command completion function, called once IOA responds |
| * @timeout: timeout to wait for this command completion |
| * @timeout_func: timeout handler |
| * |
| * Return value |
| * none |
| */ |
| static void pmcraid_send_cmd( |
| struct pmcraid_cmd *cmd, |
| void (*cmd_done) (struct pmcraid_cmd *), |
| unsigned long timeout, |
| void (*timeout_func) (struct pmcraid_cmd *) |
| ) |
| { |
| /* initialize done function */ |
| cmd->cmd_done = cmd_done; |
| |
| if (timeout_func) { |
| /* setup timeout handler */ |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.expires = jiffies + timeout; |
| cmd->timer.function = (void (*)(unsigned long))timeout_func; |
| add_timer(&cmd->timer); |
| } |
| |
| /* fire the command to IOA */ |
| _pmcraid_fire_command(cmd); |
| } |
| |
| /** |
| * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa |
| * |
| * @cmd: pointer to the command block used as part of reset sequence |
| * |
| * Return Value |
| * None |
| */ |
| static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| |
| /* Note that commands sent during reset require next command to be sent |
| * to IOA. Hence reinit the done function as well as timeout function |
| */ |
| pmcraid_reinit_cmdblk(cmd); |
| cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD; |
| cmd->ioa_cb->ioarcb.resource_handle = |
| cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN; |
| cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL; |
| |
| /* fire shutdown command to hardware. */ |
| pmcraid_info("firing normal shutdown command (%d) to IOA\n", |
| le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle)); |
| |
| pmcraid_send_cmd(cmd, pmcraid_ioa_reset, |
| PMCRAID_SHUTDOWN_TIMEOUT, |
| pmcraid_timeout_handler); |
| } |
| |
| /** |
| * pmcraid_identify_hrrq - registers host rrq buffers with IOA |
| * @cmd: pointer to command block to be used for identify hrrq |
| * |
| * Return Value |
| * 0 in case of success, otherwise non-zero failure code |
| */ |
| |
| static void pmcraid_querycfg(struct pmcraid_cmd *); |
| |
| static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| int index = 0; |
| __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]); |
| u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD); |
| |
| pmcraid_reinit_cmdblk(cmd); |
| |
| /* Initialize ioarcb */ |
| ioarcb->request_type = REQ_TYPE_IOACMD; |
| ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| |
| /* initialize the hrrq number where IOA will respond to this command */ |
| ioarcb->hrrq_id = index; |
| ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ; |
| ioarcb->cdb[1] = index; |
| |
| /* IOA expects 64-bit pci address to be written in B.E format |
| * (i.e cdb[2]=MSByte..cdb[9]=LSB. |
| */ |
| pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb => %llx:%llx\n", |
| hrrq_addr, ioarcb->ioarcb_bus_addr); |
| |
| memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr)); |
| memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size)); |
| |
| /* Subsequent commands require HRRQ identification to be successful. |
| * Note that this gets called even during reset from SCSI mid-layer |
| * or tasklet |
| */ |
| pmcraid_send_cmd(cmd, pmcraid_querycfg, |
| PMCRAID_INTERNAL_TIMEOUT, |
| pmcraid_timeout_handler); |
| } |
| |
| static void pmcraid_process_ccn(struct pmcraid_cmd *cmd); |
| static void pmcraid_process_ldn(struct pmcraid_cmd *cmd); |
| |
| /** |
| * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA |
| * |
| * @cmd: initialized command block pointer |
| * |
| * Return Value |
| * none |
| */ |
| static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd) |
| { |
| if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE) |
| atomic_set(&(cmd->drv_inst->ccn.ignore), 0); |
| else |
| atomic_set(&(cmd->drv_inst->ldn.ignore), 0); |
| |
| pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL); |
| } |
| |
| /** |
| * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA |
| * |
| * @pinstance: pointer to adapter instance structure |
| * @type: HCAM type |
| * |
| * Return Value |
| * pointer to initialized pmcraid_cmd structure or NULL |
| */ |
| static struct pmcraid_cmd *pmcraid_init_hcam |
| ( |
| struct pmcraid_instance *pinstance, |
| u8 type |
| ) |
| { |
| struct pmcraid_cmd *cmd; |
| struct pmcraid_ioarcb *ioarcb; |
| struct pmcraid_ioadl_desc *ioadl; |
| struct pmcraid_hostrcb *hcam; |
| void (*cmd_done) (struct pmcraid_cmd *); |
| dma_addr_t dma; |
| int rcb_size; |
| |
| cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (!cmd) { |
| pmcraid_err("no free command blocks for hcam\n"); |
| return cmd; |
| } |
| |
| if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) { |
| rcb_size = sizeof(struct pmcraid_hcam_ccn); |
| cmd_done = pmcraid_process_ccn; |
| dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE; |
| hcam = &pinstance->ccn; |
| } else { |
| rcb_size = sizeof(struct pmcraid_hcam_ldn); |
| cmd_done = pmcraid_process_ldn; |
| dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE; |
| hcam = &pinstance->ldn; |
| } |
| |
| /* initialize command pointer used for HCAM registration */ |
| hcam->cmd = cmd; |
| |
| ioarcb = &cmd->ioa_cb->ioarcb; |
| ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| offsetof(struct pmcraid_ioarcb, |
| add_data.u.ioadl[0])); |
| ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| ioadl = ioarcb->add_data.u.ioadl; |
| |
| /* Initialize ioarcb */ |
| ioarcb->request_type = REQ_TYPE_HCAM; |
| ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE); |
| ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC; |
| ioarcb->cdb[1] = type; |
| ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF; |
| ioarcb->cdb[8] = (rcb_size) & 0xFF; |
| |
| ioarcb->data_transfer_length = cpu_to_le32(rcb_size); |
| |
| ioadl[0].flags |= IOADL_FLAGS_READ_LAST; |
| ioadl[0].data_len = cpu_to_le32(rcb_size); |
| ioadl[0].address = cpu_to_le32(dma); |
| |
| cmd->cmd_done = cmd_done; |
| return cmd; |
| } |
| |
| /** |
| * pmcraid_send_hcam - Send an HCAM to IOA |
| * @pinstance: ioa config struct |
| * @type: HCAM type |
| * |
| * This function will send a Host Controlled Async command to IOA. |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type) |
| { |
| struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type); |
| pmcraid_send_hcam_cmd(cmd); |
| } |
| |
| |
| /** |
| * pmcraid_prepare_cancel_cmd - prepares a command block to abort another |
| * |
| * @cmd: pointer to cmd that is used as cancelling command |
| * @cmd_to_cancel: pointer to the command that needs to be cancelled |
| */ |
| static void pmcraid_prepare_cancel_cmd( |
| struct pmcraid_cmd *cmd, |
| struct pmcraid_cmd *cmd_to_cancel |
| ) |
| { |
| struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr; |
| |
| /* Get the resource handle to where the command to be aborted has been |
| * sent. |
| */ |
| ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle; |
| ioarcb->request_type = REQ_TYPE_IOACMD; |
| memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| ioarcb->cdb[0] = PMCRAID_ABORT_CMD; |
| |
| /* IOARCB address of the command to be cancelled is given in |
| * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in |
| * IOARCB address are not masked. |
| */ |
| ioarcb_addr = cpu_to_be64(ioarcb_addr); |
| memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr)); |
| } |
| |
| /** |
| * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM |
| * |
| * @cmd: command to be used as cancelling command |
| * @type: HCAM type |
| * @cmd_done: op done function for the cancelling command |
| */ |
| static void pmcraid_cancel_hcam( |
| struct pmcraid_cmd *cmd, |
| u8 type, |
| void (*cmd_done) (struct pmcraid_cmd *) |
| ) |
| { |
| struct pmcraid_instance *pinstance; |
| struct pmcraid_hostrcb *hcam; |
| |
| pinstance = cmd->drv_inst; |
| hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ? |
| &pinstance->ldn : &pinstance->ccn; |
| |
| /* prepare for cancelling previous hcam command. If the HCAM is |
| * currently not pending with IOA, we would have hcam->cmd as non-null |
| */ |
| if (hcam->cmd == NULL) |
| return; |
| |
| pmcraid_prepare_cancel_cmd(cmd, hcam->cmd); |
| |
| /* writing to IOARRIN must be protected by host_lock, as mid-layer |
| * schedule queuecommand while we are doing this |
| */ |
| pmcraid_send_cmd(cmd, cmd_done, |
| PMCRAID_INTERNAL_TIMEOUT, |
| pmcraid_timeout_handler); |
| } |
| |
| /** |
| * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA |
| * |
| * @cmd: command block to be used for cancelling the HCAM |
| */ |
| static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)); |
| |
| pmcraid_reinit_cmdblk(cmd); |
| |
| pmcraid_cancel_hcam(cmd, |
| PMCRAID_HCAM_CODE_CONFIG_CHANGE, |
| pmcraid_ioa_shutdown); |
| } |
| |
| /** |
| * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA |
| * |
| * @cmd: command block to be used for cancelling the HCAM |
| */ |
| static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd) |
| { |
| pmcraid_cancel_hcam(cmd, |
| PMCRAID_HCAM_CODE_LOG_DATA, |
| pmcraid_cancel_ccn); |
| } |
| |
| /** |
| * pmcraid_expose_resource - check if the resource can be exposed to OS |
| * |
| * @cfgte: pointer to configuration table entry of the resource |
| * |
| * Return value: |
| * true if resource can be added to midlayer, false(0) otherwise |
| */ |
| static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte) |
| { |
| int retval = 0; |
| |
| if (cfgte->resource_type == RES_TYPE_VSET) |
| retval = ((cfgte->unique_flags1 & 0xFF) < 0xFE); |
| else if (cfgte->resource_type == RES_TYPE_GSCSI) |
| retval = (RES_BUS(cfgte->resource_address) != |
| PMCRAID_VIRTUAL_ENCL_BUS_ID); |
| return retval; |
| } |
| |
| /* attributes supported by pmcraid_event_family */ |
| enum { |
| PMCRAID_AEN_ATTR_UNSPEC, |
| PMCRAID_AEN_ATTR_EVENT, |
| __PMCRAID_AEN_ATTR_MAX, |
| }; |
| #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1) |
| |
| /* commands supported by pmcraid_event_family */ |
| enum { |
| PMCRAID_AEN_CMD_UNSPEC, |
| PMCRAID_AEN_CMD_EVENT, |
| __PMCRAID_AEN_CMD_MAX, |
| }; |
| #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1) |
| |
| static struct genl_family pmcraid_event_family = { |
| .id = GENL_ID_GENERATE, |
| .name = "pmcraid", |
| .version = 1, |
| .maxattr = PMCRAID_AEN_ATTR_MAX |
| }; |
| |
| /** |
| * pmcraid_netlink_init - registers pmcraid_event_family |
| * |
| * Return value: |
| * 0 if the pmcraid_event_family is successfully registered |
| * with netlink generic, non-zero otherwise |
| */ |
| static int pmcraid_netlink_init(void) |
| { |
| int result; |
| |
| result = genl_register_family(&pmcraid_event_family); |
| |
| if (result) |
| return result; |
| |
| pmcraid_info("registered NETLINK GENERIC group: %d\n", |
| pmcraid_event_family.id); |
| |
| return result; |
| } |
| |
| /** |
| * pmcraid_netlink_release - unregisters pmcraid_event_family |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_netlink_release(void) |
| { |
| genl_unregister_family(&pmcraid_event_family); |
| } |
| |
| /** |
| * pmcraid_notify_aen - sends event msg to user space application |
| * @pinstance: pointer to adapter instance structure |
| * @type: HCAM type |
| * |
| * Return value: |
| * 0 if success, error value in case of any failure. |
| */ |
| static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type) |
| { |
| struct sk_buff *skb; |
| struct pmcraid_aen_msg *aen_msg; |
| void *msg_header; |
| int data_size, total_size; |
| int result; |
| |
| |
| if (type == PMCRAID_HCAM_CODE_LOG_DATA) { |
| aen_msg = pinstance->ldn.msg; |
| data_size = pinstance->ldn.hcam->data_len; |
| } else { |
| aen_msg = pinstance->ccn.msg; |
| data_size = pinstance->ccn.hcam->data_len; |
| } |
| |
| data_size += sizeof(struct pmcraid_hcam_hdr); |
| aen_msg->hostno = (pinstance->host->unique_id << 16 | |
| MINOR(pinstance->cdev.dev)); |
| aen_msg->length = data_size; |
| data_size += sizeof(*aen_msg); |
| |
| total_size = nla_total_size(data_size); |
| skb = genlmsg_new(total_size, GFP_ATOMIC); |
| |
| |
| if (!skb) { |
| pmcraid_err("Failed to allocate aen data SKB of size: %x\n", |
| total_size); |
| return -ENOMEM; |
| } |
| |
| /* add the genetlink message header */ |
| msg_header = genlmsg_put(skb, 0, 0, |
| &pmcraid_event_family, 0, |
| PMCRAID_AEN_CMD_EVENT); |
| if (!msg_header) { |
| pmcraid_err("failed to copy command details\n"); |
| nlmsg_free(skb); |
| return -ENOMEM; |
| } |
| |
| result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg); |
| |
| if (result) { |
| pmcraid_err("failed to copy AEN attribute data \n"); |
| nlmsg_free(skb); |
| return -EINVAL; |
| } |
| |
| /* send genetlink multicast message to notify appplications */ |
| result = genlmsg_end(skb, msg_header); |
| |
| if (result < 0) { |
| pmcraid_err("genlmsg_end failed\n"); |
| nlmsg_free(skb); |
| return result; |
| } |
| |
| result = |
| genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC); |
| |
| /* If there are no listeners, genlmsg_multicast may return non-zero |
| * value. |
| */ |
| if (result) |
| pmcraid_info("failed to send %s event message %x!\n", |
| type == PMCRAID_HCAM_CODE_LOG_DATA ? "LDN" : "CCN", |
| result); |
| return result; |
| } |
| |
| /** |
| * pmcraid_handle_config_change - Handle a config change from the adapter |
| * @pinstance: pointer to per adapter instance structure |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) |
| { |
| struct pmcraid_config_table_entry *cfg_entry; |
| struct pmcraid_hcam_ccn *ccn_hcam; |
| struct pmcraid_cmd *cmd; |
| struct pmcraid_cmd *cfgcmd; |
| struct pmcraid_resource_entry *res = NULL; |
| u32 new_entry = 1; |
| unsigned long lock_flags; |
| unsigned long host_lock_flags; |
| int rc; |
| |
| ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam; |
| cfg_entry = &ccn_hcam->cfg_entry; |
| |
| pmcraid_info |
| ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n", |
| pinstance->ccn.hcam->ilid, |
| pinstance->ccn.hcam->op_code, |
| pinstance->ccn.hcam->notification_type, |
| pinstance->ccn.hcam->notification_lost, |
| pinstance->ccn.hcam->flags, |
| pinstance->host->unique_id, |
| RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID : |
| (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID : |
| RES_BUS(cfg_entry->resource_address)), |
| RES_IS_VSET(*cfg_entry) ? cfg_entry->unique_flags1 : |
| RES_TARGET(cfg_entry->resource_address), |
| RES_LUN(cfg_entry->resource_address)); |
| |
| |
| /* If this HCAM indicates a lost notification, read the config table */ |
| if (pinstance->ccn.hcam->notification_lost) { |
| cfgcmd = pmcraid_get_free_cmd(pinstance); |
| if (cfgcmd) { |
| pmcraid_info("lost CCN, reading config table\b"); |
| pinstance->reinit_cfg_table = 1; |
| pmcraid_querycfg(cfgcmd); |
| } else { |
| pmcraid_err("lost CCN, no free cmd for querycfg\n"); |
| } |
| goto out_notify_apps; |
| } |
| |
| /* If this resource is not going to be added to mid-layer, just notify |
| * applications and return |
| */ |
| if (!pmcraid_expose_resource(cfg_entry)) |
| goto out_notify_apps; |
| |
| spin_lock_irqsave(&pinstance->resource_lock, lock_flags); |
| list_for_each_entry(res, &pinstance->used_res_q, queue) { |
| rc = memcmp(&res->cfg_entry.resource_address, |
| &cfg_entry->resource_address, |
| sizeof(cfg_entry->resource_address)); |
| if (!rc) { |
| new_entry = 0; |
| break; |
| } |
| } |
| |
| if (new_entry) { |
| |
| /* If there are more number of resources than what driver can |
| * manage, do not notify the applications about the CCN. Just |
| * ignore this notifications and re-register the same HCAM |
| */ |
| if (list_empty(&pinstance->free_res_q)) { |
| spin_unlock_irqrestore(&pinstance->resource_lock, |
| lock_flags); |
| pmcraid_err("too many resources attached\n"); |
| spin_lock_irqsave(pinstance->host->host_lock, |
| host_lock_flags); |
| pmcraid_send_hcam(pinstance, |
| PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| host_lock_flags); |
| return; |
| } |
| |
| res = list_entry(pinstance->free_res_q.next, |
| struct pmcraid_resource_entry, queue); |
| |
| list_del(&res->queue); |
| res->scsi_dev = NULL; |
| res->reset_progress = 0; |
| list_add_tail(&res->queue, &pinstance->used_res_q); |
| } |
| |
| memcpy(&res->cfg_entry, cfg_entry, |
| sizeof(struct pmcraid_config_table_entry)); |
| |
| if (pinstance->ccn.hcam->notification_type == |
| NOTIFICATION_TYPE_ENTRY_DELETED) { |
| if (res->scsi_dev) { |
| res->change_detected = RES_CHANGE_DEL; |
| res->cfg_entry.resource_handle = |
| PMCRAID_INVALID_RES_HANDLE; |
| schedule_work(&pinstance->worker_q); |
| } else { |
| /* This may be one of the non-exposed resources */ |
| list_move_tail(&res->queue, &pinstance->free_res_q); |
| } |
| } else if (!res->scsi_dev) { |
| res->change_detected = RES_CHANGE_ADD; |
| schedule_work(&pinstance->worker_q); |
| } |
| spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags); |
| |
| out_notify_apps: |
| |
| /* Notify configuration changes to registered applications.*/ |
| if (!pmcraid_disable_aen) |
| pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| |
| cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| if (cmd) |
| pmcraid_send_hcam_cmd(cmd); |
| } |
| |
| /** |
| * pmcraid_get_error_info - return error string for an ioasc |
| * @ioasc: ioasc code |
| * Return Value |
| * none |
| */ |
| static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc) |
| { |
| int i; |
| for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) { |
| if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc) |
| return &pmcraid_ioasc_error_table[i]; |
| } |
| return NULL; |
| } |
| |
| /** |
| * pmcraid_ioasc_logger - log IOASC information based user-settings |
| * @ioasc: ioasc code |
| * @cmd: pointer to command that resulted in 'ioasc' |
| */ |
| void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc); |
| |
| if (error_info == NULL || |
| cmd->drv_inst->current_log_level < error_info->log_level) |
| return; |
| |
| /* log the error string */ |
| pmcraid_err("cmd [%d] for resource %x failed with %x(%s)\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| cmd->ioa_cb->ioarcb.resource_handle, |
| le32_to_cpu(ioasc), error_info->error_string); |
| } |
| |
| /** |
| * pmcraid_handle_error_log - Handle a config change (error log) from the IOA |
| * |
| * @pinstance: pointer to per adapter instance structure |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance) |
| { |
| struct pmcraid_hcam_ldn *hcam_ldn; |
| u32 ioasc; |
| |
| hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
| |
| pmcraid_info |
| ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n", |
| pinstance->ldn.hcam->ilid, |
| pinstance->ldn.hcam->op_code, |
| pinstance->ldn.hcam->notification_type, |
| pinstance->ldn.hcam->notification_lost, |
| pinstance->ldn.hcam->flags, |
| pinstance->ldn.hcam->overlay_id); |
| |
| /* log only the errors, no need to log informational log entries */ |
| if (pinstance->ldn.hcam->notification_type != |
| NOTIFICATION_TYPE_ERROR_LOG) |
| return; |
| |
| if (pinstance->ldn.hcam->notification_lost == |
| HOSTRCB_NOTIFICATIONS_LOST) |
| dev_info(&pinstance->pdev->dev, "Error notifications lost\n"); |
| |
| ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc); |
| |
| if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
| ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) { |
| dev_info(&pinstance->pdev->dev, |
| "UnitAttention due to IOA Bus Reset\n"); |
| scsi_report_bus_reset( |
| pinstance->host, |
| RES_BUS(hcam_ldn->error_log.fd_ra)); |
| } |
| |
| return; |
| } |
| |
| /** |
| * pmcraid_process_ccn - Op done function for a CCN. |
| * @cmd: pointer to command struct |
| * |
| * This function is the op done function for a configuration |
| * change notification |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_process_ccn(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| unsigned long lock_flags; |
| |
| pinstance->ccn.cmd = NULL; |
| pmcraid_return_cmd(cmd); |
| |
| /* If driver initiated IOA reset happened while this hcam was pending |
| * with IOA, or IOA bringdown sequence is in progress, no need to |
| * re-register the hcam |
| */ |
| if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
| atomic_read(&pinstance->ccn.ignore) == 1) { |
| return; |
| } else if (ioasc) { |
| dev_info(&pinstance->pdev->dev, |
| "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc); |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| } else { |
| pmcraid_handle_config_change(pinstance); |
| } |
| } |
| |
| /** |
| * pmcraid_process_ldn - op done function for an LDN |
| * @cmd: pointer to command block |
| * |
| * Return value |
| * none |
| */ |
| static void pmcraid_initiate_reset(struct pmcraid_instance *); |
| |
| static void pmcraid_process_ldn(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| struct pmcraid_hcam_ldn *ldn_hcam = |
| (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam; |
| u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc); |
| unsigned long lock_flags; |
| |
| /* return the command block back to freepool */ |
| pinstance->ldn.cmd = NULL; |
| pmcraid_return_cmd(cmd); |
| |
| /* If driver initiated IOA reset happened while this hcam was pending |
| * with IOA, no need to re-register the hcam as reset engine will do it |
| * once reset sequence is complete |
| */ |
| if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET || |
| atomic_read(&pinstance->ccn.ignore) == 1) { |
| return; |
| } else if (!ioasc) { |
| pmcraid_handle_error_log(pinstance); |
| if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) { |
| spin_lock_irqsave(pinstance->host->host_lock, |
| lock_flags); |
| pmcraid_initiate_reset(pinstance); |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| lock_flags); |
| return; |
| } |
| } else { |
| dev_info(&pinstance->pdev->dev, |
| "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc); |
| } |
| /* send netlink message for HCAM notification if enabled */ |
| if (!pmcraid_disable_aen) |
| pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
| |
| cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
| if (cmd) |
| pmcraid_send_hcam_cmd(cmd); |
| } |
| |
| /** |
| * pmcraid_register_hcams - register HCAMs for CCN and LDN |
| * |
| * @pinstance: pointer per adapter instance structure |
| * |
| * Return Value |
| * none |
| */ |
| static void pmcraid_register_hcams(struct pmcraid_instance *pinstance) |
| { |
| pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE); |
| pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA); |
| } |
| |
| /** |
| * pmcraid_unregister_hcams - cancel HCAMs registered already |
| * @cmd: pointer to command used as part of reset sequence |
| */ |
| static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| |
| /* During IOA bringdown, HCAM gets fired and tasklet proceeds with |
| * handling hcam response though it is not necessary. In order to |
| * prevent this, set 'ignore', so that bring-down sequence doesn't |
| * re-send any more hcams |
| */ |
| atomic_set(&pinstance->ccn.ignore, 1); |
| atomic_set(&pinstance->ldn.ignore, 1); |
| |
| /* If adapter reset was forced as part of runtime reset sequence, |
| * start the reset sequence. |
| */ |
| if (pinstance->force_ioa_reset && !pinstance->ioa_bringdown) { |
| pinstance->force_ioa_reset = 0; |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| pmcraid_reset_alert(cmd); |
| return; |
| } |
| |
| /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM |
| * one after the other. So CCN cancellation will be triggered by |
| * pmcraid_cancel_ldn itself. |
| */ |
| pmcraid_cancel_ldn(cmd); |
| } |
| |
| /** |
| * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset |
| * @pinstance: pointer to adapter instance structure |
| * Return Value |
| * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0 |
| */ |
| static void pmcraid_reinit_buffers(struct pmcraid_instance *); |
| |
| static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance) |
| { |
| u32 intrs; |
| |
| pmcraid_reinit_buffers(pinstance); |
| intrs = pmcraid_read_interrupts(pinstance); |
| |
| pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS); |
| |
| if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) { |
| iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| pinstance->int_regs.ioa_host_interrupt_mask_reg); |
| iowrite32(INTRS_TRANSITION_TO_OPERATIONAL, |
| pinstance->int_regs.ioa_host_interrupt_clr_reg); |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| |
| /** |
| * pmcraid_soft_reset - performs a soft reset and makes IOA become ready |
| * @cmd : pointer to reset command block |
| * |
| * Return Value |
| * none |
| */ |
| static void pmcraid_soft_reset(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u32 int_reg; |
| u32 doorbell; |
| |
| /* There will be an interrupt when Transition to Operational bit is |
| * set so tasklet would execute next reset task. The timeout handler |
| * would re-initiate a reset |
| */ |
| cmd->cmd_done = pmcraid_ioa_reset; |
| cmd->timer.data = (unsigned long)cmd; |
| cmd->timer.expires = jiffies + |
| msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT); |
| cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler; |
| |
| if (!timer_pending(&cmd->timer)) |
| add_timer(&cmd->timer); |
| |
| /* Enable destructive diagnostics on IOA if it is not yet in |
| * operational state |
| */ |
| doorbell = DOORBELL_RUNTIME_RESET | |
| DOORBELL_ENABLE_DESTRUCTIVE_DIAGS; |
| |
| iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg); |
| int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg); |
| pmcraid_info("Waiting for IOA to become operational %x:%x\n", |
| ioread32(pinstance->int_regs.host_ioa_interrupt_reg), |
| int_reg); |
| } |
| |
| /** |
| * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt |
| * |
| * @pinstance: pointer to adapter instance structure |
| * |
| * Return Value |
| * none |
| */ |
| static void pmcraid_get_dump(struct pmcraid_instance *pinstance) |
| { |
| pmcraid_info("%s is not yet implemented\n", __func__); |
| } |
| |
| /** |
| * pmcraid_fail_outstanding_cmds - Fails all outstanding ops. |
| * @pinstance: pointer to adapter instance structure |
| * |
| * This function fails all outstanding ops. If they are submitted to IOA |
| * already, it sends cancel all messages if IOA is still accepting IOARCBs, |
| * otherwise just completes the commands and returns the cmd blocks to free |
| * pool. |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance) |
| { |
| struct pmcraid_cmd *cmd, *temp; |
| unsigned long lock_flags; |
| |
| /* pending command list is protected by pending_pool_lock. Its |
| * traversal must be done as within this lock |
| */ |
| spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool, |
| free_list) { |
| list_del(&cmd->free_list); |
| spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
| lock_flags); |
| cmd->ioa_cb->ioasa.ioasc = |
| cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET); |
| cmd->ioa_cb->ioasa.ilid = |
| cpu_to_be32(PMCRAID_DRIVER_ILID); |
| |
| /* In case the command timer is still running */ |
| del_timer(&cmd->timer); |
| |
| /* If this is an IO command, complete it by invoking scsi_done |
| * function. If this is one of the internal commands other |
| * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to |
| * complete it |
| */ |
| if (cmd->scsi_cmd) { |
| |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| __le32 resp = cmd->ioa_cb->ioarcb.response_handle; |
| |
| scsi_cmd->result |= DID_ERROR << 16; |
| |
| scsi_dma_unmap(scsi_cmd); |
| pmcraid_return_cmd(cmd); |
| |
| pmcraid_info("failing(%d) CDB[0] = %x result: %x\n", |
| le32_to_cpu(resp) >> 2, |
| cmd->ioa_cb->ioarcb.cdb[0], |
| scsi_cmd->result); |
| scsi_cmd->scsi_done(scsi_cmd); |
| } else if (cmd->cmd_done == pmcraid_internal_done || |
| cmd->cmd_done == pmcraid_erp_done) { |
| cmd->cmd_done(cmd); |
| } else if (cmd->cmd_done != pmcraid_ioa_reset) { |
| pmcraid_return_cmd(cmd); |
| } |
| |
| atomic_dec(&pinstance->outstanding_cmds); |
| spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags); |
| } |
| |
| spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags); |
| } |
| |
| /** |
| * pmcraid_ioa_reset - Implementation of IOA reset logic |
| * |
| * @cmd: pointer to the cmd block to be used for entire reset process |
| * |
| * This function executes most of the steps required for IOA reset. This gets |
| * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's |
| * 'eh_' thread. Access to variables used for controling the reset sequence is |
| * synchronized using host lock. Various functions called during reset process |
| * would make use of a single command block, pointer to which is also stored in |
| * adapter instance structure. |
| * |
| * Return Value |
| * None |
| */ |
| static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| u8 reset_complete = 0; |
| |
| pinstance->ioa_reset_in_progress = 1; |
| |
| if (pinstance->reset_cmd != cmd) { |
| pmcraid_err("reset is called with different command block\n"); |
| pinstance->reset_cmd = cmd; |
| } |
| |
| pmcraid_info("reset_engine: state = %d, command = %p\n", |
| pinstance->ioa_state, cmd); |
| |
| switch (pinstance->ioa_state) { |
| |
| case IOA_STATE_DEAD: |
| /* If IOA is offline, whatever may be the reset reason, just |
| * return. callers might be waiting on the reset wait_q, wake |
| * up them |
| */ |
| pmcraid_err("IOA is offline no reset is possible\n"); |
| reset_complete = 1; |
| break; |
| |
| case IOA_STATE_IN_BRINGDOWN: |
| /* we enter here, once ioa shutdown command is processed by IOA |
| * Alert IOA for a possible reset. If reset alert fails, IOA |
| * goes through hard-reset |
| */ |
| pmcraid_disable_interrupts(pinstance, ~0); |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| pmcraid_reset_alert(cmd); |
| break; |
| |
| case IOA_STATE_UNKNOWN: |
| /* We may be called during probe or resume. Some pre-processing |
| * is required for prior to reset |
| */ |
| scsi_block_requests(pinstance->host); |
| |
| /* If asked to reset while IOA was processing responses or |
| * there are any error responses then IOA may require |
| * hard-reset. |
| */ |
| if (pinstance->ioa_hard_reset == 0) { |
| if (ioread32(pinstance->ioa_status) & |
| INTRS_TRANSITION_TO_OPERATIONAL) { |
| pmcraid_info("sticky bit set, bring-up\n"); |
| pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| pmcraid_reinit_cmdblk(cmd); |
| pmcraid_identify_hrrq(cmd); |
| } else { |
| pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
| pmcraid_soft_reset(cmd); |
| } |
| } else { |
| /* Alert IOA of a possible reset and wait for critical |
| * operation in progress bit to reset |
| */ |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| pmcraid_reset_alert(cmd); |
| } |
| break; |
| |
| case IOA_STATE_IN_RESET_ALERT: |
| /* If critical operation in progress bit is reset or wait gets |
| * timed out, reset proceeds with starting BIST on the IOA. |
| * pmcraid_ioa_hard_reset keeps a count of reset attempts. If |
| * they are 3 or more, reset engine marks IOA dead and returns |
| */ |
| pinstance->ioa_state = IOA_STATE_IN_HARD_RESET; |
| pmcraid_start_bist(cmd); |
| break; |
| |
| case IOA_STATE_IN_HARD_RESET: |
| pinstance->ioa_reset_attempts++; |
| |
| /* retry reset if we haven't reached maximum allowed limit */ |
| if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) { |
| pinstance->ioa_reset_attempts = 0; |
| pmcraid_err("IOA didn't respond marking it as dead\n"); |
| pinstance->ioa_state = IOA_STATE_DEAD; |
| reset_complete = 1; |
| break; |
| } |
| |
| /* Once either bist or pci reset is done, restore PCI config |
| * space. If this fails, proceed with hard reset again |
| */ |
| |
| if (pci_restore_state(pinstance->pdev)) { |
| pmcraid_info("config-space error resetting again\n"); |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| pmcraid_reset_alert(cmd); |
| break; |
| } |
| |
| /* fail all pending commands */ |
| pmcraid_fail_outstanding_cmds(pinstance); |
| |
| /* check if unit check is active, if so extract dump */ |
| if (pinstance->ioa_unit_check) { |
| pmcraid_info("unit check is active\n"); |
| pinstance->ioa_unit_check = 0; |
| pmcraid_get_dump(pinstance); |
| pinstance->ioa_reset_attempts--; |
| pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; |
| pmcraid_reset_alert(cmd); |
| break; |
| } |
| |
| /* if the reset reason is to bring-down the ioa, we might be |
| * done with the reset restore pci_config_space and complete |
| * the reset |
| */ |
| if (pinstance->ioa_bringdown) { |
| pmcraid_info("bringing down the adapter\n"); |
| pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| pinstance->ioa_bringdown = 0; |
| pinstance->ioa_state = IOA_STATE_UNKNOWN; |
| reset_complete = 1; |
| } else { |
| /* bring-up IOA, so proceed with soft reset |
| * Reinitialize hrrq_buffers and their indices also |
| * enable interrupts after a pci_restore_state |
| */ |
| if (pmcraid_reset_enable_ioa(pinstance)) { |
| pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| pmcraid_info("bringing up the adapter\n"); |
| pmcraid_reinit_cmdblk(cmd); |
| pmcraid_identify_hrrq(cmd); |
| } else { |
| pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET; |
| pmcraid_soft_reset(cmd); |
| } |
| } |
| break; |
| |
| case IOA_STATE_IN_SOFT_RESET: |
| /* TRANSITION TO OPERATIONAL is on so start initialization |
| * sequence |
| */ |
| pmcraid_info("In softreset proceeding with bring-up\n"); |
| pinstance->ioa_state = IOA_STATE_IN_BRINGUP; |
| |
| /* Initialization commands start with HRRQ identification. From |
| * now on tasklet completes most of the commands as IOA is up |
| * and intrs are enabled |
| */ |
| pmcraid_identify_hrrq(cmd); |
| break; |
| |
| case IOA_STATE_IN_BRINGUP: |
| /* we are done with bringing up of IOA, change the ioa_state to |
| * operational and wake up any waiters |
| */ |
| pinstance->ioa_state = IOA_STATE_OPERATIONAL; |
| reset_complete = 1; |
| break; |
| |
| case IOA_STATE_OPERATIONAL: |
| default: |
| /* When IOA is operational and a reset is requested, check for |
| * the reset reason. If reset is to bring down IOA, unregister |
| * HCAMs and initiate shutdown; if adapter reset is forced then |
| * restart reset sequence again |
| */ |
| if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE && |
| pinstance->force_ioa_reset == 0) { |
| reset_complete = 1; |
| } else { |
| if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE) |
| pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN; |
| pmcraid_reinit_cmdblk(cmd); |
| pmcraid_unregister_hcams(cmd); |
| } |
| break; |
| } |
| |
| /* reset will be completed if ioa_state is either DEAD or UNKNOWN or |
| * OPERATIONAL. Reset all control variables used during reset, wake up |
| * any waiting threads and let the SCSI mid-layer send commands. Note |
| * that host_lock must be held before invoking scsi_report_bus_reset. |
| */ |
| if (reset_complete) { |
| pinstance->ioa_reset_in_progress = 0; |
| pinstance->ioa_reset_attempts = 0; |
| pinstance->reset_cmd = NULL; |
| pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| pinstance->ioa_bringdown = 0; |
| pmcraid_return_cmd(cmd); |
| |
| /* If target state is to bring up the adapter, proceed with |
| * hcam registration and resource exposure to mid-layer. |
| */ |
| if (pinstance->ioa_state == IOA_STATE_OPERATIONAL) |
| pmcraid_register_hcams(pinstance); |
| |
| wake_up_all(&pinstance->reset_wait_q); |
| } |
| |
| return; |
| } |
| |
| /** |
| * pmcraid_initiate_reset - initiates reset sequence. This is called from |
| * ISR/tasklet during error interrupts including IOA unit check. If reset |
| * is already in progress, it just returns, otherwise initiates IOA reset |
| * to bring IOA up to operational state. |
| * |
| * @pinstance: pointer to adapter instance structure |
| * |
| * Return value |
| * none |
| */ |
| static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance) |
| { |
| struct pmcraid_cmd *cmd; |
| |
| /* If the reset is already in progress, just return, otherwise start |
| * reset sequence and return |
| */ |
| if (!pinstance->ioa_reset_in_progress) { |
| scsi_block_requests(pinstance->host); |
| cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (cmd == NULL) { |
| pmcraid_err("no cmnd blocks for initiate_reset\n"); |
| return; |
| } |
| |
| pinstance->ioa_shutdown_type = SHUTDOWN_NONE; |
| pinstance->reset_cmd = cmd; |
| pinstance->force_ioa_reset = 1; |
| pmcraid_ioa_reset(cmd); |
| } |
| } |
| |
| /** |
| * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup |
| * or bringdown IOA |
| * @pinstance: pointer adapter instance structure |
| * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV |
| * @target_state: expected target state after reset |
| * |
| * Note: This command initiates reset and waits for its completion. Hence this |
| * should not be called from isr/timer/tasklet functions (timeout handlers, |
| * error response handlers and interrupt handlers). |
| * |
| * Return Value |
| * 1 in case ioa_state is not target_state, 0 otherwise. |
| */ |
| static int pmcraid_reset_reload( |
| struct pmcraid_instance *pinstance, |
| u8 shutdown_type, |
| u8 target_state |
| ) |
| { |
| struct pmcraid_cmd *reset_cmd = NULL; |
| unsigned long lock_flags; |
| int reset = 1; |
| |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| |
| if (pinstance->ioa_reset_in_progress) { |
| pmcraid_info("reset_reload: reset is already in progress\n"); |
| |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| |
| wait_event(pinstance->reset_wait_q, |
| !pinstance->ioa_reset_in_progress); |
| |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| |
| if (pinstance->ioa_state == IOA_STATE_DEAD) { |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| lock_flags); |
| pmcraid_info("reset_reload: IOA is dead\n"); |
| return reset; |
| } else if (pinstance->ioa_state == target_state) { |
| reset = 0; |
| } |
| } |
| |
| if (reset) { |
| pmcraid_info("reset_reload: proceeding with reset\n"); |
| scsi_block_requests(pinstance->host); |
| reset_cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (reset_cmd == NULL) { |
| pmcraid_err("no free cmnd for reset_reload\n"); |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| lock_flags); |
| return reset; |
| } |
| |
| if (shutdown_type == SHUTDOWN_NORMAL) |
| pinstance->ioa_bringdown = 1; |
| |
| pinstance->ioa_shutdown_type = shutdown_type; |
| pinstance->reset_cmd = reset_cmd; |
| pinstance->force_ioa_reset = reset; |
| pmcraid_info("reset_reload: initiating reset\n"); |
| pmcraid_ioa_reset(reset_cmd); |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| pmcraid_info("reset_reload: waiting for reset to complete\n"); |
| wait_event(pinstance->reset_wait_q, |
| !pinstance->ioa_reset_in_progress); |
| |
| pmcraid_info("reset_reload: reset is complete !! \n"); |
| scsi_unblock_requests(pinstance->host); |
| if (pinstance->ioa_state == target_state) |
| reset = 0; |
| } |
| |
| return reset; |
| } |
| |
| /** |
| * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA |
| * |
| * @pinstance: pointer to adapter instance structure |
| * |
| * Return Value |
| * whatever is returned from pmcraid_reset_reload |
| */ |
| static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance) |
| { |
| return pmcraid_reset_reload(pinstance, |
| SHUTDOWN_NORMAL, |
| IOA_STATE_UNKNOWN); |
| } |
| |
| /** |
| * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA |
| * |
| * @pinstance: pointer to adapter instance structure |
| * |
| * Return Value |
| * whatever is returned from pmcraid_reset_reload |
| */ |
| static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance) |
| { |
| return pmcraid_reset_reload(pinstance, |
| SHUTDOWN_NONE, |
| IOA_STATE_OPERATIONAL); |
| } |
| |
| /** |
| * pmcraid_request_sense - Send request sense to a device |
| * @cmd: pmcraid command struct |
| * |
| * This function sends a request sense to a device as a result of a check |
| * condition. This method re-uses the same command block that failed earlier. |
| */ |
| static void pmcraid_request_sense(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| |
| /* allocate DMAable memory for sense buffers */ |
| cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev, |
| SCSI_SENSE_BUFFERSIZE, |
| &cmd->sense_buffer_dma); |
| |
| if (cmd->sense_buffer == NULL) { |
| pmcraid_err |
| ("couldn't allocate sense buffer for request sense\n"); |
| pmcraid_erp_done(cmd); |
| return; |
| } |
| |
| /* re-use the command block */ |
| memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa)); |
| memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| ioarcb->request_flags0 = (SYNC_COMPLETE | |
| NO_LINK_DESCS | |
| INHIBIT_UL_CHECK); |
| ioarcb->request_type = REQ_TYPE_SCSI; |
| ioarcb->cdb[0] = REQUEST_SENSE; |
| ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
| |
| ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| offsetof(struct pmcraid_ioarcb, |
| add_data.u.ioadl[0])); |
| ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc)); |
| |
| ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
| |
| ioadl->address = cpu_to_le64(cmd->sense_buffer_dma); |
| ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); |
| ioadl->flags = IOADL_FLAGS_LAST_DESC; |
| |
| /* request sense might be called as part of error response processing |
| * which runs in tasklets context. It is possible that mid-layer might |
| * schedule queuecommand during this time, hence, writting to IOARRIN |
| * must be protect by host_lock |
| */ |
| pmcraid_send_cmd(cmd, pmcraid_erp_done, |
| PMCRAID_REQUEST_SENSE_TIMEOUT, |
| pmcraid_timeout_handler); |
| } |
| |
| /** |
| * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery |
| * @cmd: command that failed |
| * @sense: true if request_sense is required after cancel all |
| * |
| * This function sends a cancel all to a device to clear the queue. |
| */ |
| static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense) |
| { |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
| void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done |
| : pmcraid_request_sense; |
| |
| memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN); |
| ioarcb->request_flags0 = SYNC_OVERRIDE; |
| ioarcb->request_type = REQ_TYPE_IOACMD; |
| ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS; |
| |
| if (RES_IS_GSCSI(res->cfg_entry)) |
| ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL; |
| |
| ioarcb->ioadl_bus_addr = 0; |
| ioarcb->ioadl_length = 0; |
| ioarcb->data_transfer_length = 0; |
| ioarcb->ioarcb_bus_addr &= (~0x1FULL); |
| |
| /* writing to IOARRIN must be protected by host_lock, as mid-layer |
| * schedule queuecommand while we are doing this |
| */ |
| pmcraid_send_cmd(cmd, cmd_done, |
| PMCRAID_REQUEST_SENSE_TIMEOUT, |
| pmcraid_timeout_handler); |
| } |
| |
| /** |
| * pmcraid_frame_auto_sense: frame fixed format sense information |
| * |
| * @cmd: pointer to failing command block |
| * |
| * Return value |
| * none |
| */ |
| static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd) |
| { |
| u8 *sense_buf = cmd->scsi_cmd->sense_buffer; |
| struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata; |
| struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
| u32 ioasc = le32_to_cpu(ioasa->ioasc); |
| u32 failing_lba = 0; |
| |
| memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); |
| cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION; |
| |
| if (RES_IS_VSET(res->cfg_entry) && |
| ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC && |
| ioasa->u.vset.failing_lba_hi != 0) { |
| |
| sense_buf[0] = 0x72; |
| sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
| sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
| sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
| |
| sense_buf[7] = 12; |
| sense_buf[8] = 0; |
| sense_buf[9] = 0x0A; |
| sense_buf[10] = 0x80; |
| |
| failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi); |
| |
| sense_buf[12] = (failing_lba & 0xff000000) >> 24; |
| sense_buf[13] = (failing_lba & 0x00ff0000) >> 16; |
| sense_buf[14] = (failing_lba & 0x0000ff00) >> 8; |
| sense_buf[15] = failing_lba & 0x000000ff; |
| |
| failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo); |
| |
| sense_buf[16] = (failing_lba & 0xff000000) >> 24; |
| sense_buf[17] = (failing_lba & 0x00ff0000) >> 16; |
| sense_buf[18] = (failing_lba & 0x0000ff00) >> 8; |
| sense_buf[19] = failing_lba & 0x000000ff; |
| } else { |
| sense_buf[0] = 0x70; |
| sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc); |
| sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc); |
| sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc); |
| |
| if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) { |
| if (RES_IS_VSET(res->cfg_entry)) |
| failing_lba = |
| le32_to_cpu(ioasa->u. |
| vset.failing_lba_lo); |
| sense_buf[0] |= 0x80; |
| sense_buf[3] = (failing_lba >> 24) & 0xff; |
| sense_buf[4] = (failing_lba >> 16) & 0xff; |
| sense_buf[5] = (failing_lba >> 8) & 0xff; |
| sense_buf[6] = failing_lba & 0xff; |
| } |
| |
| sense_buf[7] = 6; /* additional length */ |
| } |
| } |
| |
| /** |
| * pmcraid_error_handler - Error response handlers for a SCSI op |
| * @cmd: pointer to pmcraid_cmd that has failed |
| * |
| * This function determines whether or not to initiate ERP on the affected |
| * device. This is called from a tasklet, which doesn't hold any locks. |
| * |
| * Return value: |
| * 0 it caller can complete the request, otherwise 1 where in error |
| * handler itself completes the request and returns the command block |
| * back to free-pool |
| */ |
| static int pmcraid_error_handler(struct pmcraid_cmd *cmd) |
| { |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata; |
| struct pmcraid_instance *pinstance = cmd->drv_inst; |
| struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa; |
| u32 ioasc = le32_to_cpu(ioasa->ioasc); |
| u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK; |
| u32 sense_copied = 0; |
| |
| if (!res) { |
| pmcraid_info("resource pointer is NULL\n"); |
| return 0; |
| } |
| |
| /* If this was a SCSI read/write command keep count of errors */ |
| if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD) |
| atomic_inc(&res->read_failures); |
| else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD) |
| atomic_inc(&res->write_failures); |
| |
| if (!RES_IS_GSCSI(res->cfg_entry) && |
| masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) { |
| pmcraid_frame_auto_sense(cmd); |
| } |
| |
| /* Log IOASC/IOASA information based on user settings */ |
| pmcraid_ioasc_logger(ioasc, cmd); |
| |
| switch (masked_ioasc) { |
| |
| case PMCRAID_IOASC_AC_TERMINATED_BY_HOST: |
| scsi_cmd->result |= (DID_ABORT << 16); |
| break; |
| |
| case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE: |
| case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE: |
| scsi_cmd->result |= (DID_NO_CONNECT << 16); |
| break; |
| |
| case PMCRAID_IOASC_NR_SYNC_REQUIRED: |
| res->sync_reqd = 1; |
| scsi_cmd->result |= (DID_IMM_RETRY << 16); |
| break; |
| |
| case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC: |
| scsi_cmd->result |= (DID_PASSTHROUGH << 16); |
| break; |
| |
| case PMCRAID_IOASC_UA_BUS_WAS_RESET: |
| case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER: |
| if (!res->reset_progress) |
| scsi_report_bus_reset(pinstance->host, |
| scsi_cmd->device->channel); |
| scsi_cmd->result |= (DID_ERROR << 16); |
| break; |
| |
| case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR: |
| scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc); |
| res->sync_reqd = 1; |
| |
| /* if check_condition is not active return with error otherwise |
| * get/frame the sense buffer |
| */ |
| if (PMCRAID_IOASC_SENSE_STATUS(ioasc) != |
| SAM_STAT_CHECK_CONDITION && |
| PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE) |
| return 0; |
| |
| /* If we have auto sense data as part of IOASA pass it to |
| * mid-layer |
| */ |
| if (ioasa->auto_sense_length != 0) { |
| short sense_len = ioasa->auto_sense_length; |
| int data_size = min_t(u16, le16_to_cpu(sense_len), |
| SCSI_SENSE_BUFFERSIZE); |
| |
| memcpy(scsi_cmd->sense_buffer, |
| ioasa->sense_data, |
| data_size); |
| sense_copied = 1; |
| } |
| |
| if (RES_IS_GSCSI(res->cfg_entry)) { |
| pmcraid_cancel_all(cmd, sense_copied); |
| } else if (sense_copied) { |
| pmcraid_erp_done(cmd); |
| return 0; |
| } else { |
| pmcraid_request_sense(cmd); |
| } |
| |
| return 1; |
| |
| case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED: |
| break; |
| |
| default: |
| if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR) |
| scsi_cmd->result |= (DID_ERROR << 16); |
| break; |
| } |
| return 0; |
| } |
| |
| /** |
| * pmcraid_reset_device - device reset handler functions |
| * |
| * @scsi_cmd: scsi command struct |
| * @modifier: reset modifier indicating the reset sequence to be performed |
| * |
| * This function issues a device reset to the affected device. |
| * A LUN reset will be sent to the device first. If that does |
| * not work, a target reset will be sent. |
| * |
| * Return value: |
| * SUCCESS / FAILED |
| */ |
| static int pmcraid_reset_device( |
| struct scsi_cmnd *scsi_cmd, |
| unsigned long timeout, |
| u8 modifier |
| ) |
| { |
| struct pmcraid_cmd *cmd; |
| struct pmcraid_instance *pinstance; |
| struct pmcraid_resource_entry *res; |
| struct pmcraid_ioarcb *ioarcb; |
| unsigned long lock_flags; |
| u32 ioasc; |
| |
| pinstance = |
| (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
| res = scsi_cmd->device->hostdata; |
| |
| if (!res) { |
| sdev_printk(KERN_ERR, scsi_cmd->device, |
| "reset_device: NULL resource pointer\n"); |
| return FAILED; |
| } |
| |
| /* If adapter is currently going through reset/reload, return failed. |
| * This will force the mid-layer to call _eh_bus/host reset, which |
| * will then go to sleep and wait for the reset to complete |
| */ |
| spin_lock_irqsave(pinstance->host->host_lock, lock_flags); |
| if (pinstance->ioa_reset_in_progress || |
| pinstance->ioa_state == IOA_STATE_DEAD) { |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| return FAILED; |
| } |
| |
| res->reset_progress = 1; |
| pmcraid_info("Resetting %s resource with addr %x\n", |
| ((modifier & RESET_DEVICE_LUN) ? "LUN" : |
| ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")), |
| le32_to_cpu(res->cfg_entry.resource_address)); |
| |
| /* get a free cmd block */ |
| cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (cmd == NULL) { |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| pmcraid_err("%s: no cmd blocks are available\n", __func__); |
| return FAILED; |
| } |
| |
| ioarcb = &cmd->ioa_cb->ioarcb; |
| ioarcb->resource_handle = res->cfg_entry.resource_handle; |
| ioarcb->request_type = REQ_TYPE_IOACMD; |
| ioarcb->cdb[0] = PMCRAID_RESET_DEVICE; |
| |
| /* Initialize reset modifier bits */ |
| if (modifier) |
| modifier = ENABLE_RESET_MODIFIER | modifier; |
| |
| ioarcb->cdb[1] = modifier; |
| |
| init_completion(&cmd->wait_for_completion); |
| cmd->completion_req = 1; |
| |
| pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle), |
| le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2); |
| |
| pmcraid_send_cmd(cmd, |
| pmcraid_internal_done, |
| timeout, |
| pmcraid_timeout_handler); |
| |
| spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags); |
| |
| /* RESET_DEVICE command completes after all pending IOARCBs are |
| * completed. Once this command is completed, pmcraind_internal_done |
| * will wake up the 'completion' queue. |
| */ |
| wait_for_completion(&cmd->wait_for_completion); |
| |
| /* complete the command here itself and return the command block |
| * to free list |
| */ |
| pmcraid_return_cmd(cmd); |
| res->reset_progress = 0; |
| ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| |
| /* set the return value based on the returned ioasc */ |
| return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
| } |
| |
| /** |
| * _pmcraid_io_done - helper for pmcraid_io_done function |
| * |
| * @cmd: pointer to pmcraid command struct |
| * @reslen: residual data length to be set in the ioasa |
| * @ioasc: ioasc either returned by IOA or set by driver itself. |
| * |
| * This function is invoked by pmcraid_io_done to complete mid-layer |
| * scsi ops. |
| * |
| * Return value: |
| * 0 if caller is required to return it to free_pool. Returns 1 if |
| * caller need not worry about freeing command block as error handler |
| * will take care of that. |
| */ |
| |
| static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc) |
| { |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| int rc = 0; |
| |
| scsi_set_resid(scsi_cmd, reslen); |
| |
| pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n", |
| le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2, |
| cmd->ioa_cb->ioarcb.cdb[0], |
| ioasc, scsi_cmd->result); |
| |
| if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0) |
| rc = pmcraid_error_handler(cmd); |
| |
| if (rc == 0) { |
| scsi_dma_unmap(scsi_cmd); |
| scsi_cmd->scsi_done(scsi_cmd); |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * pmcraid_io_done - SCSI completion function |
| * |
| * @cmd: pointer to pmcraid command struct |
| * |
| * This function is invoked by tasklet/mid-layer error handler to completing |
| * the SCSI ops sent from mid-layer. |
| * |
| * Return value |
| * none |
| */ |
| |
| static void pmcraid_io_done(struct pmcraid_cmd *cmd) |
| { |
| u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc); |
| u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length); |
| |
| if (_pmcraid_io_done(cmd, reslen, ioasc) == 0) |
| pmcraid_return_cmd(cmd); |
| } |
| |
| /** |
| * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA |
| * |
| * @cmd: command block of the command to be aborted |
| * |
| * Return Value: |
| * returns pointer to command structure used as cancelling cmd |
| */ |
| static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd) |
| { |
| struct pmcraid_cmd *cancel_cmd; |
| struct pmcraid_instance *pinstance; |
| struct pmcraid_resource_entry *res; |
| |
| pinstance = (struct pmcraid_instance *)cmd->drv_inst; |
| res = cmd->scsi_cmd->device->hostdata; |
| |
| cancel_cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (cancel_cmd == NULL) { |
| pmcraid_err("%s: no cmd blocks are available\n", __func__); |
| return NULL; |
| } |
| |
| pmcraid_prepare_cancel_cmd(cancel_cmd, cmd); |
| |
| pmcraid_info("aborting command CDB[0]= %x with index = %d\n", |
| cmd->ioa_cb->ioarcb.cdb[0], |
| cmd->ioa_cb->ioarcb.response_handle >> 2); |
| |
| init_completion(&cancel_cmd->wait_for_completion); |
| cancel_cmd->completion_req = 1; |
| |
| pmcraid_info("command (%d) CDB[0] = %x for %x\n", |
| le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2, |
| cmd->ioa_cb->ioarcb.cdb[0], |
| le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle)); |
| |
| pmcraid_send_cmd(cancel_cmd, |
| pmcraid_internal_done, |
| PMCRAID_INTERNAL_TIMEOUT, |
| pmcraid_timeout_handler); |
| return cancel_cmd; |
| } |
| |
| /** |
| * pmcraid_abort_complete - Waits for ABORT TASK completion |
| * |
| * @cancel_cmd: command block use as cancelling command |
| * |
| * Return Value: |
| * returns SUCCESS if ABORT TASK has good completion |
| * otherwise FAILED |
| */ |
| static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd) |
| { |
| struct pmcraid_resource_entry *res; |
| u32 ioasc; |
| |
| wait_for_completion(&cancel_cmd->wait_for_completion); |
| res = cancel_cmd->u.res; |
| cancel_cmd->u.res = NULL; |
| ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc); |
| |
| /* If the abort task is not timed out we will get a Good completion |
| * as sense_key, otherwise we may get one the following responses |
| * due to subsquent bus reset or device reset. In case IOASC is |
| * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource |
| */ |
| if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET || |
| ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) { |
| if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) |
| res->sync_reqd = 1; |
| ioasc = 0; |
| } |
| |
| /* complete the command here itself */ |
| pmcraid_return_cmd(cancel_cmd); |
| return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS; |
| } |
| |
| /** |
| * pmcraid_eh_abort_handler - entry point for aborting a single task on errors |
| * |
| * @scsi_cmd: scsi command struct given by mid-layer. When this is called |
| * mid-layer ensures that no other commands are queued. This |
| * never gets called under interrupt, but a separate eh thread. |
| * |
| * Return value: |
| * SUCCESS / FAILED |
| */ |
| static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd) |
| { |
| struct pmcraid_instance *pinstance; |
| struct pmcraid_cmd *cmd; |
| struct pmcraid_resource_entry *res; |
| unsigned long host_lock_flags; |
| unsigned long pending_lock_flags; |
| struct pmcraid_cmd *cancel_cmd = NULL; |
| int cmd_found = 0; |
| int rc = FAILED; |
| |
| pinstance = |
| (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
| |
| scmd_printk(KERN_INFO, scsi_cmd, |
| "I/O command timed out, aborting it.\n"); |
| |
| res = scsi_cmd->device->hostdata; |
| |
| if (res == NULL) |
| return rc; |
| |
| /* If we are currently going through reset/reload, return failed. |
| * This will force the mid-layer to eventually call |
| * pmcraid_eh_host_reset which will then go to sleep and wait for the |
| * reset to complete |
| */ |
| spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags); |
| |
| if (pinstance->ioa_reset_in_progress || |
| pinstance->ioa_state == IOA_STATE_DEAD) { |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| host_lock_flags); |
| return rc; |
| } |
| |
| /* loop over pending cmd list to find cmd corresponding to this |
| * scsi_cmd. Note that this command might not have been completed |
| * already. locking: all pending commands are protected with |
| * pending_pool_lock. |
| */ |
| spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags); |
| list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) { |
| |
| if (cmd->scsi_cmd == scsi_cmd) { |
| cmd_found = 1; |
| break; |
| } |
| } |
| |
| spin_unlock_irqrestore(&pinstance->pending_pool_lock, |
| pending_lock_flags); |
| |
| /* If the command to be aborted was given to IOA and still pending with |
| * it, send ABORT_TASK to abort this and wait for its completion |
| */ |
| if (cmd_found) |
| cancel_cmd = pmcraid_abort_cmd(cmd); |
| |
| spin_unlock_irqrestore(pinstance->host->host_lock, |
| host_lock_flags); |
| |
| if (cancel_cmd) { |
| cancel_cmd->u.res = cmd->scsi_cmd->device->hostdata; |
| rc = pmcraid_abort_complete(cancel_cmd); |
| } |
| |
| return cmd_found ? rc : SUCCESS; |
| } |
| |
| /** |
| * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks |
| * |
| * @scmd: pointer to scsi_cmd that was sent to the resource to be reset. |
| * |
| * All these routines invokve pmcraid_reset_device with appropriate parameters. |
| * Since these are called from mid-layer EH thread, no other IO will be queued |
| * to the resource being reset. However, control path (IOCTL) may be active so |
| * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device |
| * takes care by locking/unlocking host_lock. |
| * |
| * Return value |
| * SUCCESS or FAILED |
| */ |
| static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd) |
| { |
| scmd_printk(KERN_INFO, scmd, |
| "resetting device due to an I/O command timeout.\n"); |
| return pmcraid_reset_device(scmd, |
| PMCRAID_INTERNAL_TIMEOUT, |
| RESET_DEVICE_LUN); |
| } |
| |
| static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd) |
| { |
| scmd_printk(KERN_INFO, scmd, |
| "Doing bus reset due to an I/O command timeout.\n"); |
| return pmcraid_reset_device(scmd, |
| PMCRAID_RESET_BUS_TIMEOUT, |
| RESET_DEVICE_BUS); |
| } |
| |
| static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd) |
| { |
| scmd_printk(KERN_INFO, scmd, |
| "Doing target reset due to an I/O command timeout.\n"); |
| return pmcraid_reset_device(scmd, |
| PMCRAID_INTERNAL_TIMEOUT, |
| RESET_DEVICE_TARGET); |
| } |
| |
| /** |
| * pmcraid_eh_host_reset_handler - adapter reset handler callback |
| * |
| * @scmd: pointer to scsi_cmd that was sent to a resource of adapter |
| * |
| * Initiates adapter reset to bring it up to operational state |
| * |
| * Return value |
| * SUCCESS or FAILED |
| */ |
| static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd) |
| { |
| unsigned long interval = 10000; /* 10 seconds interval */ |
| int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval; |
| struct pmcraid_instance *pinstance = |
| (struct pmcraid_instance *)(scmd->device->host->hostdata); |
| |
| |
| /* wait for an additional 150 seconds just in case firmware could come |
| * up and if it could complete all the pending commands excluding the |
| * two HCAM (CCN and LDN). |
| */ |
| while (waits--) { |
| if (atomic_read(&pinstance->outstanding_cmds) <= |
| PMCRAID_MAX_HCAM_CMD) |
| return SUCCESS; |
| msleep(interval); |
| } |
| |
| dev_err(&pinstance->pdev->dev, |
| "Adapter being reset due to an I/O command timeout.\n"); |
| return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED; |
| } |
| |
| /** |
| * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes |
| * @scsi_cmd: scsi command struct |
| * |
| * Return value |
| * number of tags or 0 if the task is not tagged |
| */ |
| static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd) |
| { |
| char tag[2]; |
| u8 rc = 0; |
| |
| if (scsi_populate_tag_msg(scsi_cmd, tag)) { |
| switch (tag[0]) { |
| case MSG_SIMPLE_TAG: |
| rc = TASK_TAG_SIMPLE; |
| break; |
| case MSG_HEAD_TAG: |
| rc = TASK_TAG_QUEUE_HEAD; |
| break; |
| case MSG_ORDERED_TAG: |
| rc = TASK_TAG_ORDERED; |
| break; |
| }; |
| } |
| |
| return rc; |
| } |
| |
| |
| /** |
| * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB |
| * @cmd: pmcraid command struct |
| * @sgcount: count of scatter-gather elements |
| * |
| * Return value |
| * returns pointer pmcraid_ioadl_desc, initialized to point to internal |
| * or external IOADLs |
| */ |
| struct pmcraid_ioadl_desc * |
| pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount) |
| { |
| struct pmcraid_ioadl_desc *ioadl; |
| struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb; |
| int ioadl_count = 0; |
| |
| if (ioarcb->add_cmd_param_length) |
| ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16); |
| ioarcb->ioadl_length = |
| sizeof(struct pmcraid_ioadl_desc) * sgcount; |
| |
| if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) { |
| /* external ioadls start at offset 0x80 from control_block |
| * structure, re-using 24 out of 27 ioadls part of IOARCB. |
| * It is necessary to indicate to firmware that driver is |
| * using ioadls to be treated as external to IOARCB. |
| */ |
| ioarcb->ioarcb_bus_addr &= ~(0x1FULL); |
| ioarcb->ioadl_bus_addr = |
| cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| offsetof(struct pmcraid_ioarcb, |
| add_data.u.ioadl[3])); |
| ioadl = &ioarcb->add_data.u.ioadl[3]; |
| } else { |
| ioarcb->ioadl_bus_addr = |
| cpu_to_le64((cmd->ioa_cb_bus_addr) + |
| offsetof(struct pmcraid_ioarcb, |
| add_data.u.ioadl[ioadl_count])); |
| |
| ioadl = &ioarcb->add_data.u.ioadl[ioadl_count]; |
| ioarcb->ioarcb_bus_addr |= |
| DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8); |
| } |
| |
| return ioadl; |
| } |
| |
| /** |
| * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer |
| * @pinstance: pointer to adapter instance structure |
| * @cmd: pmcraid command struct |
| * |
| * This function is invoked by queuecommand entry point while sending a command |
| * to firmware. This builds ioadl descriptors and sets up ioarcb fields. |
| * |
| * Return value: |
| * 0 on success or -1 on failure |
| */ |
| static int pmcraid_build_ioadl( |
| struct pmcraid_instance *pinstance, |
| struct pmcraid_cmd *cmd |
| ) |
| { |
| int i, nseg; |
| struct scatterlist *sglist; |
| |
| struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd; |
| struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb); |
| struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl; |
| |
| u32 length = scsi_bufflen(scsi_cmd); |
| |
| if (!length) |
| return 0; |
| |
| nseg = scsi_dma_map(scsi_cmd); |
| |
| if (nseg < 0) { |
| scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n"); |
| return -1; |
| } else if (nseg > PMCRAID_MAX_IOADLS) { |
| scsi_dma_unmap(scsi_cmd); |
| scmd_printk(KERN_ERR, scsi_cmd, |
| "sg count is (%d) more than allowed!\n", nseg); |
| return -1; |
| } |
| |
| /* Initialize IOARCB data transfer length fields */ |
| if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) |
| ioarcb->request_flags0 |= TRANSFER_DIR_WRITE; |
| |
| ioarcb->request_flags0 |= NO_LINK_DESCS; |
| ioarcb->data_transfer_length = cpu_to_le32(length); |
| ioadl = pmcraid_init_ioadls(cmd, nseg); |
| |
| /* Initialize IOADL descriptor addresses */ |
| scsi_for_each_sg(scsi_cmd, sglist, nseg, i) { |
| ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist)); |
| ioadl[i].address = cpu_to_le64(sg_dma_address(sglist)); |
| ioadl[i].flags = 0; |
| } |
| /* setup last descriptor */ |
| ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC; |
| |
| return 0; |
| } |
| |
| /** |
| * pmcraid_free_sglist - Frees an allocated SG buffer list |
| * @sglist: scatter/gather list pointer |
| * |
| * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist |
| * |
| * Return value: |
| * none |
| */ |
| static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) |
| { |
| int i; |
| |
| for (i = 0; i < sglist->num_sg; i++) |
| __free_pages(sg_page(&(sglist->scatterlist[i])), |
| sglist->order); |
| |
| kfree(sglist); |
| } |
| |
| /** |
| * pmcraid_alloc_sglist - Allocates memory for a SG list |
| * @buflen: buffer length |
| * |
| * Allocates a DMA'able buffer in chunks and assembles a scatter/gather |
| * list. |
| * |
| * Return value |
| * pointer to sglist / NULL on failure |
| */ |
| static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) |
| { |
| struct pmcraid_sglist *sglist; |
| struct scatterlist *scatterlist; |
| struct page *page; |
| int num_elem, i, j; |
| int sg_size; |
| int order; |
| int bsize_elem; |
| |
| sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); |
| order = (sg_size > 0) ? get_order(sg_size) : 0; |
| bsize_elem = PAGE_SIZE * (1 << order); |
| |
| /* Determine the actual number of sg entries needed */ |
| if (buflen % bsize_elem) |
| num_elem = (buflen / bsize_elem) + 1; |
| else |
| num_elem = buflen / bsize_elem; |
| |
| /* Allocate a scatter/gather list for the DMA */ |
| sglist = kzalloc(sizeof(struct pmcraid_sglist) + |
| (sizeof(struct scatterlist) * (num_elem - 1)), |
| GFP_KERNEL); |
| |
| if (sglist == NULL) |
| return NULL; |
| |
| scatterlist = sglist->scatterlist; |
| sg_init_table(scatterlist, num_elem); |
| sglist->order = order; |
| sglist->num_sg = num_elem; |
| sg_size = buflen; |
| |
| for (i = 0; i < num_elem; i++) { |
| page = alloc_pages(GFP_KERNEL|GFP_DMA, order); |
| if (!page) { |
| for (j = i - 1; j >= 0; j--) |
| __free_pages(sg_page(&scatterlist[j]), order); |
| kfree(sglist); |
| return NULL; |
| } |
| |
| sg_set_page(&scatterlist[i], page, |
| sg_size < bsize_elem ? sg_size : bsize_elem, 0); |
| sg_size -= bsize_elem; |
| } |
| |
| return sglist; |
| } |
| |
| /** |
| * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list |
| * @sglist: scatter/gather list pointer |
| * @buffer: buffer pointer |
| * @len: buffer length |
| * @direction: data transfer direction |
| * |
| * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist |
| * |
| * Return value: |
| * 0 on success / other on failure |
| */ |
| static int pmcraid_copy_sglist( |
| struct pmcraid_sglist *sglist, |
| unsigned long buffer, |
| u32 len, |
| int direction |
| ) |
| { |
| struct scatterlist *scatterlist; |
| void *kaddr; |
| int bsize_elem; |
| int i; |
| int rc = 0; |
| |
| /* Determine the actual number of bytes per element */ |
| bsize_elem = PAGE_SIZE * (1 << sglist->order); |
| |
| scatterlist = sglist->scatterlist; |
| |
| for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) { |
| struct page *page = sg_page(&scatterlist[i]); |
| |
| kaddr = kmap(page); |
| if (direction == DMA_TO_DEVICE) |
| rc = __copy_from_user(kaddr, |
| (void *)buffer, |
| bsize_elem); |
| else |
| rc = __copy_to_user((void *)buffer, kaddr, bsize_elem); |
| |
| kunmap(page); |
| |
| if (rc) { |
| pmcraid_err("failed to copy user data into sg list\n"); |
| return -EFAULT; |
| } |
| |
| scatterlist[i].length = bsize_elem; |
| } |
| |
| if (len % bsize_elem) { |
| struct page *page = sg_page(&scatterlist[i]); |
| |
| kaddr = kmap(page); |
| |
| if (direction == DMA_TO_DEVICE) |
| rc = __copy_from_user(kaddr, |
| (void *)buffer, |
| len % bsize_elem); |
| else |
| rc = __copy_to_user((void *)buffer, |
| kaddr, |
| len % bsize_elem); |
| |
| kunmap(page); |
| |
| scatterlist[i].length = len % bsize_elem; |
| } |
| |
| if (rc) { |
| pmcraid_err("failed to copy user data into sg list\n"); |
| rc = -EFAULT; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * pmcraid_queuecommand - Queue a mid-layer request |
| * @scsi_cmd: scsi command struct |
| * @done: done function |
| * |
| * This function queues a request generated by the mid-layer. Midlayer calls |
| * this routine within host->lock. Some of the functions called by queuecommand |
| * would use cmd block queue locks (free_pool_lock and pending_pool_lock) |
| * |
| * Return value: |
| * 0 on success |
| * SCSI_MLQUEUE_DEVICE_BUSY if device is busy |
| * SCSI_MLQUEUE_HOST_BUSY if host is busy |
| */ |
| static int pmcraid_queuecommand( |
| struct scsi_cmnd *scsi_cmd, |
| void (*done) (struct scsi_cmnd *) |
| ) |
| { |
| struct pmcraid_instance *pinstance; |
| struct pmcraid_resource_entry *res; |
| struct pmcraid_ioarcb *ioarcb; |
| struct pmcraid_cmd *cmd; |
| int rc = 0; |
| |
| pinstance = |
| (struct pmcraid_instance *)scsi_cmd->device->host->hostdata; |
| |
| scsi_cmd->scsi_done = done; |
| res = scsi_cmd->device->hostdata; |
| scsi_cmd->result = (DID_OK << 16); |
| |
| /* if adapter is marked as dead, set result to DID_NO_CONNECT complete |
| * the command |
| */ |
| if (pinstance->ioa_state == IOA_STATE_DEAD) { |
| pmcraid_info("IOA is dead, but queuecommand is scheduled\n"); |
| scsi_cmd->result = (DID_NO_CONNECT << 16); |
| scsi_cmd->scsi_done(scsi_cmd); |
| return 0; |
| } |
| |
| /* If IOA reset is in progress, can't queue the commands */ |
| if (pinstance->ioa_reset_in_progress) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| /* initialize the command and IOARCB to be sent to IOA */ |
| cmd = pmcraid_get_free_cmd(pinstance); |
| |
| if (cmd == NULL) { |
| pmcraid_err("free command block is not available\n"); |
| return SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| cmd->scsi_cmd = scsi_cmd; |
| ioarcb = &(cmd->ioa_cb->ioarcb); |
| memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len); |
| ioarcb->resource_handle = res->cfg_entry.resource_handle; |
| ioarcb->request_type = REQ_TYPE_SCSI; |
| |
| cmd->cmd_done = pmcraid_io_done; |
| |
| if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) { |
| if (scsi_cmd->underflow == 0) |
| ioarcb->request_flags0 |= INHIBIT_UL_CHECK; |
| |
| if (res->sync_reqd) { |
| ioarcb->request_flags0 |= SYNC_COMPLETE; |
| res->sync_reqd = 0; |
| } |
| |
| ioarcb->request_flags0 |= NO_LINK_DESCS; |
| ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd); |
| |
| if (RES_IS_GSCSI(res->cfg_entry)) |
| ioarcb->request_flags1 |= DELAY_AFTER_RESET; |
| } |
| |
| rc = pmcraid_build_ioadl(pinstance, cmd); |
| |
| pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n", |
| le32_to_cpu(ioarcb->response_handle) >> 2, |
| scsi_cmd->cmnd[0], pinstance->host->unique_id, |
| RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID : |
| PMCRAID_PHYS_BUS_ID, |
| RES_IS_VSET(res->cfg_entry) ? |
| res->cfg_entry.unique_flags1 : |
| RES_TARGET(res->cfg_entry.resource_address), |
| RES_LUN(res->cfg_entry.resource_address)); |
| |
| if (likely(rc == 0)) { |
| _pmcraid_fire_command(cmd); |
| } else { |
| pmcraid_err("queuecommand could not build ioadl\n"); |
| pmcraid_return_cmd(cmd); |
| rc = SCSI_MLQUEUE_HOST_BUSY; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * pmcraid_open -char node "open" entry, allowed only users with admin access |
| */ |
| static int pmcraid_chr_open(struct inode *inode, struct file *filep) |
| { |
| struct pmcraid_instance *pinstance; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| /* Populate adapter instance * pointer for use by ioctl */ |
| pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev); |
| filep->private_data = pinstance; |
| |
| return 0; |
| } |
| |
| /** |
| * pmcraid_release - char node "release" entry point |
| */ |
| static int pmcraid_chr_release(struct inode *inode, struct file *filep) |
| { |
| struct pmcraid_instance *pinstance = |
| ((<
|