diff options
| -rw-r--r-- | drivers/scsi/hpsa.c | 226 | ||||
| -rw-r--r-- | drivers/scsi/hpsa.h | 6 |
2 files changed, 216 insertions, 16 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index c096cda3a6f..6fe77d0575c 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -2743,6 +2743,26 @@ static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg) } } +static int __devinit hpsa_send_host_reset(struct ctlr_info *h, + unsigned char *scsi3addr, u8 reset_type) +{ + struct CommandList *c; + + c = cmd_alloc(h); + if (!c) + return -ENOMEM; + fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, + RAID_CTLR_LUNID, TYPE_MSG); + c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */ + c->waiting = NULL; + enqueue_cmd_and_start_io(h, c); + /* Don't wait for completion, the reset won't complete. Don't free + * the command either. This is the last command we will send before + * re-initializing everything, so it doesn't matter and won't leak. + */ + return 0; +} + static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, void *buff, size_t size, u8 page_code, unsigned char *scsi3addr, int cmd_type) @@ -2820,7 +2840,8 @@ static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_NONE; c->Request.Timeout = 0; /* Don't time out */ - c->Request.CDB[0] = 0x01; /* RESET_MSG is 0x01 */ + memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); + c->Request.CDB[0] = cmd; c->Request.CDB[1] = 0x03; /* Reset target above */ /* If bytes 4-7 are zero, it means reset the */ /* LunID device */ @@ -2986,6 +3007,63 @@ static inline u32 process_nonindexed_cmd(struct ctlr_info *h, return next_command(h); } +/* Some controllers, like p400, will give us one interrupt + * after a soft reset, even if we turned interrupts off. + * Only need to check for this in the hpsa_xxx_discard_completions + * functions. + */ +static int ignore_bogus_interrupt(struct ctlr_info *h) +{ + if (likely(!reset_devices)) + return 0; + + if (likely(h->interrupts_enabled)) + return 0; + + dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled " + "(known firmware bug.) Ignoring.\n"); + + return 1; +} + +static irqreturn_t hpsa_intx_discard_completions(int irq, void *dev_id) +{ + struct ctlr_info *h = dev_id; + unsigned long flags; + u32 raw_tag; + + if (ignore_bogus_interrupt(h)) + return IRQ_NONE; + + if (interrupt_not_for_us(h)) + return IRQ_NONE; + spin_lock_irqsave(&h->lock, flags); + while (interrupt_pending(h)) { + raw_tag = get_next_completion(h); + while (raw_tag != FIFO_EMPTY) + raw_tag = next_command(h); + } + spin_unlock_irqrestore(&h->lock, flags); + return IRQ_HANDLED; +} + +static irqreturn_t hpsa_msix_discard_completions(int irq, void *dev_id) +{ + struct ctlr_info *h = dev_id; + unsigned long flags; + u32 raw_tag; + + if (ignore_bogus_interrupt(h)) + return IRQ_NONE; + + spin_lock_irqsave(&h->lock, flags); + raw_tag = get_next_completion(h); + while (raw_tag != FIFO_EMPTY) + raw_tag = next_command(h); + spin_unlock_irqrestore(&h->lock, flags); + return IRQ_HANDLED; +} + static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id) { struct ctlr_info *h = dev_id; @@ -3124,7 +3202,6 @@ static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode, return 0; } -#define hpsa_soft_reset_controller(p) hpsa_message(p, 1, 0) #define hpsa_noop(p) hpsa_message(p, 3, 0) static int hpsa_controller_hard_reset(struct pci_dev *pdev, @@ -3320,7 +3397,7 @@ static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev) "'Bit 2 doorbell reset' is " "supported, but not 'bit 5 doorbell reset'. " "Firmware update is recommended.\n"); - rc = -ENODEV; + rc = -ENOTSUPP; /* try soft reset */ goto unmap_cfgtable; } } @@ -3344,13 +3421,18 @@ static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev) /* Wait for board to become not ready, then ready. */ dev_info(&pdev->dev, "Waiting for board to reset.\n"); rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY); - if (rc) + if (rc) { dev_warn(&pdev->dev, - "failed waiting for board to reset\n"); + "failed waiting for board to reset." + " Will try soft reset.\n"); + rc = -ENOTSUPP; /* Not expected, but try soft reset later */ + goto unmap_cfgtable; + } rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY); if (rc) { dev_warn(&pdev->dev, - "failed waiting for board to become ready\n"); + "failed waiting for board to become ready " + "after hard reset\n"); goto unmap_cfgtable; } @@ -3358,11 +3440,11 @@ static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev) if (rc < 0) goto unmap_cfgtable; if (rc) { - dev_warn(&pdev->dev, "Unable to successfully reset controller," - " Ignoring controller.\n"); - rc = -ENODEV; + dev_warn(&pdev->dev, "Unable to successfully reset " + "controller. Will try soft reset.\n"); + rc = -ENOTSUPP; } else { - dev_info(&pdev->dev, "board ready.\n"); + dev_info(&pdev->dev, "board ready after hard reset.\n"); } unmap_cfgtable: @@ -3840,7 +3922,7 @@ static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev) * due to concerns about shared bbwc between 6402/6404 pair. */ if (rc == -ENOTSUPP) - return 0; /* just try to do the kdump anyhow. */ + return rc; /* just try to do the kdump anyhow. */ if (rc) return -ENODEV; @@ -3910,18 +3992,79 @@ static int hpsa_request_irq(struct ctlr_info *h, return 0; } +static int __devinit hpsa_kdump_soft_reset(struct ctlr_info *h) +{ + if (hpsa_send_host_reset(h, RAID_CTLR_LUNID, + HPSA_RESET_TYPE_CONTROLLER)) { + dev_warn(&h->pdev->dev, "Resetting array controller failed.\n"); + return -EIO; + } + + dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n"); + if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) { + dev_warn(&h->pdev->dev, "Soft reset had no effect.\n"); + return -1; + } + + dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n"); + if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) { + dev_warn(&h->pdev->dev, "Board failed to become ready " + "after soft reset.\n"); + return -1; + } + + return 0; +} + +static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h) +{ + free_irq(h->intr[h->intr_mode], h); +#ifdef CONFIG_PCI_MSI + if (h->msix_vector) + pci_disable_msix(h->pdev); + else if (h->msi_vector) + pci_disable_msi(h->pdev); +#endif /* CONFIG_PCI_MSI */ + hpsa_free_sg_chain_blocks(h); + hpsa_free_cmd_pool(h); + kfree(h->blockFetchTable); + pci_free_consistent(h->pdev, h->reply_pool_size, + h->reply_pool, h->reply_pool_dhandle); + if (h->vaddr) + iounmap(h->vaddr); + if (h->transtable) + iounmap(h->transtable); + if (h->cfgtable) + iounmap(h->cfgtable); + pci_release_regions(h->pdev); + kfree(h); +} + static int __devinit hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int dac, rc; struct ctlr_info *h; + int try_soft_reset = 0; + unsigned long flags; if (number_of_controllers == 0) printk(KERN_INFO DRIVER_NAME "\n"); rc = hpsa_init_reset_devices(pdev); - if (rc) - return rc; + if (rc) { + if (rc != -ENOTSUPP) + return rc; + /* If the reset fails in a particular way (it has no way to do + * a proper hard reset, so returns -ENOTSUPP) we can try to do + * a soft reset once we get the controller configured up to the + * point that it can accept a command. + */ + try_soft_reset = 1; + rc = 0; + } + +reinit_after_soft_reset: /* Command structures must be aligned on a 32-byte boundary because * the 5 lower bits of the address are used by the hardware. and by @@ -3981,11 +4124,66 @@ static int __devinit hpsa_init_one(struct pci_dev *pdev, h->ndevices = 0; h->scsi_host = NULL; spin_lock_init(&h->devlock); + hpsa_put_ctlr_into_performant_mode(h); + + /* At this point, the controller is ready to take commands. + * Now, if reset_devices and the hard reset didn't work, try + * the soft reset and see if that works. + */ + if (try_soft_reset) { + + /* This is kind of gross. We may or may not get a completion + * from the soft reset command, and if we do, then the value + * from the fifo may or may not be valid. So, we wait 10 secs + * after the reset throwing away any completions we get during + * that time. Unregister the interrupt handler and register + * fake ones to scoop up any residual completions. + */ + spin_lock_irqsave(&h->lock, flags); + h->access.set_intr_mask(h, HPSA_INTR_OFF); + spin_unlock_irqrestore(&h->lock, flags); + free_irq(h->intr[h->intr_mode], h); + rc = hpsa_request_irq(h, hpsa_msix_discard_completions, + hpsa_intx_discard_completions); + if (rc) { + dev_warn(&h->pdev->dev, "Failed to request_irq after " + "soft reset.\n"); + goto clean4; + } + + rc = hpsa_kdump_soft_reset(h); + if (rc) + /* Neither hard nor soft reset worked, we're hosed. */ + goto clean4; + + dev_info(&h->pdev->dev, "Board READY.\n"); + dev_info(&h->pdev->dev, + "Waiting for stale completions to drain.\n"); + h->access.set_intr_mask(h, HPSA_INTR_ON); + msleep(10000); + h->access.set_intr_mask(h, HPSA_INTR_OFF); + + rc = controller_reset_failed(h->cfgtable); + if (rc) + dev_info(&h->pdev->dev, + "Soft reset appears to have failed.\n"); + + /* since the controller's reset, we have to go back and re-init + * everything. Easiest to just forget what we've done and do it + * all over again. + */ + hpsa_undo_allocations_after_kdump_soft_reset(h); + try_soft_reset = 0; + if (rc) + /* don't go to clean4, we already unallocated */ + return -ENODEV; + + goto reinit_after_soft_reset; + } /* Turn the interrupts on so we can service requests */ h->access.set_intr_mask(h, HPSA_INTR_ON); - hpsa_put_ctlr_into_performant_mode(h); hpsa_hba_inquiry(h); hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */ h->busy_initializing = 0; diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index b1412a7f451..6d8dcd4dd06 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -127,8 +127,10 @@ struct ctlr_info { }; #define HPSA_ABORT_MSG 0 #define HPSA_DEVICE_RESET_MSG 1 -#define HPSA_BUS_RESET_MSG 2 -#define HPSA_HOST_RESET_MSG 3 +#define HPSA_RESET_TYPE_CONTROLLER 0x00 +#define HPSA_RESET_TYPE_BUS 0x01 +#define HPSA_RESET_TYPE_TARGET 0x03 +#define HPSA_RESET_TYPE_LUN 0x04 #define HPSA_MSG_SEND_RETRY_LIMIT 10 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000) |