diff options
author | Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com> | 2016-02-04 02:06:01 +0300 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-02-24 05:27:02 +0300 |
commit | 5c63f7f710bdde6454d304a84146a5338962a509 (patch) | |
tree | b34de46aed3b9cfa6e8da397df8ac30a3d2e2812 /drivers/scsi/aacraid | |
parent | 3f4ce057d51a9c0ed9b01ba693df685d230ffcae (diff) | |
download | linux-5c63f7f710bdde6454d304a84146a5338962a509.tar.xz |
aacraid: Added EEH support
Added support for PCI EEH (extended error handling).
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/aacraid')
-rw-r--r-- | drivers/scsi/aacraid/aacraid.h | 1 | ||||
-rw-r--r-- | drivers/scsi/aacraid/linit.c | 140 |
2 files changed, 140 insertions, 1 deletions
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index fff13063cf71..291628814b8b 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -1235,6 +1235,7 @@ struct aac_dev struct msix_entry msixentry[AAC_MAX_MSIX]; struct aac_msix_ctx aac_msix[AAC_MAX_MSIX]; /* context */ u8 adapter_shutdown; + u32 handle_pci_error; }; #define aac_adapter_interrupt(dev) \ diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index 129a515c7e49..822b695e5b45 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -38,6 +38,7 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/pci.h> +#include <linux/aer.h> #include <linux/pci-aspm.h> #include <linux/slab.h> #include <linux/mutex.h> @@ -1298,6 +1299,9 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) goto out_deinit; scsi_scan_host(shost); + pci_enable_pcie_error_reporting(pdev); + pci_save_state(pdev); + return 0; out_deinit: @@ -1319,7 +1323,6 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) return error; } -#if (defined(CONFIG_PM)) static void aac_release_resources(struct aac_dev *aac) { int i; @@ -1414,6 +1417,8 @@ error_iounmap: return -1; } + +#if (defined(CONFIG_PM)) static int aac_suspend(struct pci_dev *pdev, pm_message_t state) { @@ -1501,6 +1506,138 @@ static void aac_remove_one(struct pci_dev *pdev) } } +static void aac_flush_ios(struct aac_dev *aac) +{ + int i; + struct scsi_cmnd *cmd; + + for (i = 0; i < aac->scsi_host_ptr->can_queue; i++) { + cmd = (struct scsi_cmnd *)aac->fibs[i].callback_data; + if (cmd && (cmd->SCp.phase == AAC_OWNER_FIRMWARE)) { + scsi_dma_unmap(cmd); + + if (aac->handle_pci_error) + cmd->result = DID_NO_CONNECT << 16; + else + cmd->result = DID_RESET << 16; + + cmd->scsi_done(cmd); + } + } +} + +static pci_ers_result_t aac_pci_error_detected(struct pci_dev *pdev, + enum pci_channel_state error) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + struct aac_dev *aac = shost_priv(shost); + + dev_err(&pdev->dev, "aacraid: PCI error detected %x\n", error); + + switch (error) { + case pci_channel_io_normal: + return PCI_ERS_RESULT_CAN_RECOVER; + case pci_channel_io_frozen: + aac->handle_pci_error = 1; + + scsi_block_requests(aac->scsi_host_ptr); + aac_flush_ios(aac); + aac_release_resources(aac); + + pci_disable_pcie_error_reporting(pdev); + aac_adapter_ioremap(aac, 0); + + return PCI_ERS_RESULT_NEED_RESET; + case pci_channel_io_perm_failure: + aac->handle_pci_error = 1; + + aac_flush_ios(aac); + return PCI_ERS_RESULT_DISCONNECT; + } + + return PCI_ERS_RESULT_NEED_RESET; +} + +static pci_ers_result_t aac_pci_mmio_enabled(struct pci_dev *pdev) +{ + dev_err(&pdev->dev, "aacraid: PCI error - mmio enabled\n"); + return PCI_ERS_RESULT_NEED_RESET; +} + +static pci_ers_result_t aac_pci_slot_reset(struct pci_dev *pdev) +{ + dev_err(&pdev->dev, "aacraid: PCI error - slot reset\n"); + pci_restore_state(pdev); + if (pci_enable_device(pdev)) { + dev_warn(&pdev->dev, + "aacraid: failed to enable slave\n"); + goto fail_device; + } + + pci_set_master(pdev); + + if (pci_enable_device_mem(pdev)) { + dev_err(&pdev->dev, "pci_enable_device_mem failed\n"); + goto fail_device; + } + + return PCI_ERS_RESULT_RECOVERED; + +fail_device: + dev_err(&pdev->dev, "aacraid: PCI error - slot reset failed\n"); + return PCI_ERS_RESULT_DISCONNECT; +} + + +static void aac_pci_resume(struct pci_dev *pdev) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + struct scsi_device *sdev = NULL; + struct aac_dev *aac = (struct aac_dev *)shost_priv(shost); + + pci_cleanup_aer_uncorrect_error_status(pdev); + + if (aac_adapter_ioremap(aac, aac->base_size)) { + + dev_err(&pdev->dev, "aacraid: ioremap failed\n"); + /* remap failed, go back ... */ + aac->comm_interface = AAC_COMM_PRODUCER; + if (aac_adapter_ioremap(aac, AAC_MIN_FOOTPRINT_SIZE)) { + dev_warn(&pdev->dev, + "aacraid: unable to map adapter.\n"); + + return; + } + } + + msleep(10000); + + aac_acquire_resources(aac); + + /* + * reset this flag to unblock ioctl() as it was set + * at aac_send_shutdown() to block ioctls from upperlayer + */ + aac->adapter_shutdown = 0; + aac->handle_pci_error = 0; + + shost_for_each_device(sdev, shost) + if (sdev->sdev_state == SDEV_OFFLINE) + sdev->sdev_state = SDEV_RUNNING; + scsi_unblock_requests(aac->scsi_host_ptr); + scsi_scan_host(aac->scsi_host_ptr); + pci_save_state(pdev); + + dev_err(&pdev->dev, "aacraid: PCI error - resume\n"); +} + +static struct pci_error_handlers aac_pci_err_handler = { + .error_detected = aac_pci_error_detected, + .mmio_enabled = aac_pci_mmio_enabled, + .slot_reset = aac_pci_slot_reset, + .resume = aac_pci_resume, +}; + static struct pci_driver aac_pci_driver = { .name = AAC_DRIVERNAME, .id_table = aac_pci_tbl, @@ -1511,6 +1648,7 @@ static struct pci_driver aac_pci_driver = { .resume = aac_resume, #endif .shutdown = aac_shutdown, + .err_handler = &aac_pci_err_handler, }; static int __init aac_init(void) |