From: Brian King Date: Mon, 7 May 2007 22:09:05 +0000 (-0500) Subject: [SCSI] ipr: Use PCI-E reset API for new ipr adapter X-Git-Tag: v2.6.22-rc1~345^2~6 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=463fc696ed723a9d854113e370cc177b0b63de42;p=linux-2.6-omap-h63xx.git [SCSI] ipr: Use PCI-E reset API for new ipr adapter Use a newly added PCI API to issue a PCI Fundamental reset (warm reset) to a new ipr PCI-E adapter. Typically, the ipr adapter uses the start BIST bit in config space to reset an adapter. Issuing start BIST on this particular adapter results in the PCI-E logic on the card losing sync, which causes PCI-E errors, making the card unusable. The only reset mechanism that exists on this hardware that does not have this problem is PCI Fundamental reset (warm reset). Signed-off-by: Brian King Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 101e519844d..4baa79e6867 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -6640,6 +6640,48 @@ static int ipr_reset_start_bist(struct ipr_cmnd *ipr_cmd) return rc; } +/** + * ipr_reset_slot_reset_done - Clear PCI reset to the adapter + * @ipr_cmd: ipr command struct + * + * Description: This clears PCI reset to the adapter and delays two seconds. + * + * Return value: + * IPR_RC_JOB_RETURN + **/ +static int ipr_reset_slot_reset_done(struct ipr_cmnd *ipr_cmd) +{ + ENTER; + pci_set_pcie_reset_state(ipr_cmd->ioa_cfg->pdev, pcie_deassert_reset); + ipr_cmd->job_step = ipr_reset_bist_done; + ipr_reset_start_timer(ipr_cmd, IPR_WAIT_FOR_BIST_TIMEOUT); + LEAVE; + return IPR_RC_JOB_RETURN; +} + +/** + * ipr_reset_slot_reset - Reset the PCI slot of the adapter. + * @ipr_cmd: ipr command struct + * + * Description: This asserts PCI reset to the adapter. + * + * Return value: + * IPR_RC_JOB_RETURN + **/ +static int ipr_reset_slot_reset(struct ipr_cmnd *ipr_cmd) +{ + struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; + struct pci_dev *pdev = ioa_cfg->pdev; + + ENTER; + pci_block_user_cfg_access(pdev); + pci_set_pcie_reset_state(pdev, pcie_warm_reset); + ipr_cmd->job_step = ipr_reset_slot_reset_done; + ipr_reset_start_timer(ipr_cmd, IPR_PCI_RESET_TIMEOUT); + LEAVE; + return IPR_RC_JOB_RETURN; +} + /** * ipr_reset_allowed - Query whether or not IOA can be reset * @ioa_cfg: ioa config struct @@ -6679,7 +6721,7 @@ static int ipr_reset_wait_to_start_bist(struct ipr_cmnd *ipr_cmd) ipr_cmd->u.time_left -= IPR_CHECK_FOR_RESET_TIMEOUT; ipr_reset_start_timer(ipr_cmd, IPR_CHECK_FOR_RESET_TIMEOUT); } else { - ipr_cmd->job_step = ipr_reset_start_bist; + ipr_cmd->job_step = ioa_cfg->reset; rc = IPR_RC_JOB_CONTINUE; } @@ -6712,7 +6754,7 @@ static int ipr_reset_alert(struct ipr_cmnd *ipr_cmd) writel(IPR_UPROCI_RESET_ALERT, ioa_cfg->regs.set_uproc_interrupt_reg); ipr_cmd->job_step = ipr_reset_wait_to_start_bist; } else { - ipr_cmd->job_step = ipr_reset_start_bist; + ipr_cmd->job_step = ioa_cfg->reset; } ipr_cmd->u.time_left = IPR_WAIT_FOR_RESET_TIMEOUT; @@ -6994,8 +7036,11 @@ static pci_ers_result_t ipr_pci_slot_reset(struct pci_dev *pdev) struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev); spin_lock_irqsave(ioa_cfg->host->host_lock, flags); - _ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_restore_cfg_space, - IPR_SHUTDOWN_NONE); + if (ioa_cfg->needs_warm_reset) + ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE); + else + _ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_restore_cfg_space, + IPR_SHUTDOWN_NONE); spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags); return PCI_ERS_RESULT_RECOVERED; } @@ -7483,6 +7528,14 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev, else ioa_cfg->transop_timeout = IPR_OPERATIONAL_TIMEOUT; + rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &ioa_cfg->revid); + + if (rc != PCIBIOS_SUCCESSFUL) { + dev_err(&pdev->dev, "Failed to read PCI revision ID\n"); + rc = -EIO; + goto out_scsi_host_put; + } + ipr_regs_pci = pci_resource_start(pdev, 0); rc = pci_request_regions(pdev, IPR_NAME); @@ -7569,6 +7622,13 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev, goto cleanup_nolog; } + if ((dev_id->driver_data & IPR_USE_PCI_WARM_RESET) || + (dev_id->device == PCI_DEVICE_ID_IBM_OBSIDIAN_E && !ioa_cfg->revid)) { + ioa_cfg->needs_warm_reset = 1; + ioa_cfg->reset = ipr_reset_slot_reset; + } else + ioa_cfg->reset = ipr_reset_start_bist; + spin_lock(&ipr_driver_lock); list_add_tail(&ioa_cfg->queue, &ipr_ioa_head); spin_unlock(&ipr_driver_lock); @@ -7835,7 +7895,7 @@ static struct pci_device_id ipr_pci_table[] __devinitdata = { PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B3, 0, 0, 0 }, { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B7, 0, 0, - IPR_USE_LONG_TRANSOP_TIMEOUT }, + IPR_USE_LONG_TRANSOP_TIMEOUT | IPR_USE_PCI_WARM_RESET }, { PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2780, 0, 0, 0 }, { PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h index daa96ee19d4..d93156671e9 100644 --- a/drivers/scsi/ipr.h +++ b/drivers/scsi/ipr.h @@ -37,7 +37,7 @@ /* * Literals */ -#define IPR_DRIVER_VERSION "2.4.0" +#define IPR_DRIVER_VERSION "2.4.1" #define IPR_DRIVER_DATE "(April 24, 2007)" /* @@ -112,6 +112,7 @@ /* Driver data flags */ #define IPR_USE_LONG_TRANSOP_TIMEOUT 0x00000001 +#define IPR_USE_PCI_WARM_RESET 0x00000002 #define IPR_DEFAULT_MAX_ERROR_DUMP 984 #define IPR_NUM_LOG_HCAMS 2 @@ -193,6 +194,7 @@ #define IPR_WAIT_FOR_RESET_TIMEOUT (2 * HZ) #define IPR_CHECK_FOR_RESET_TIMEOUT (HZ / 10) #define IPR_WAIT_FOR_BIST_TIMEOUT (2 * HZ) +#define IPR_PCI_RESET_TIMEOUT (HZ / 2) #define IPR_DUMP_TIMEOUT (15 * HZ) /* @@ -1091,6 +1093,9 @@ struct ipr_ioa_cfg { u8 allow_ml_add_del:1; u8 needs_hard_reset:1; u8 dual_raid:1; + u8 needs_warm_reset:1; + + u8 revid; enum ipr_cache_state cache_state; u16 type; /* CCIN of the card */ @@ -1184,6 +1189,7 @@ struct ipr_ioa_cfg { struct pci_pool *ipr_cmd_pool; struct ipr_cmnd *reset_cmd; + int (*reset) (struct ipr_cmnd *); struct ata_host ata_host; char ipr_cmd_label[8];