From 22e4dda06dd0fa2a56e573049411479a1f759cbb Mon Sep 17 00:00:00 2001 From: "Allan, Bruce W" Date: Fri, 9 Jan 2015 11:54:58 -0800 Subject: crypto: qat - fix device reset flow When the device needs a reset, e.g. when an uncorrectable PCIe AER event occurs, various services/data structures need to be cleaned up, the hardware reset and the services/data structures initialized and started. The code to perform the cleanup and initialization was not performed when a device reset was done. This patch moves some of the initialization code out of the .probe entry- point into a separate function that is now called during probe as well as after the hardware has been reset. Similarly, a new function is added for first cleaning up these services/data structures prior to resetting. The new functions are adf_dev_init() and adf_dev_shutdown(), respectively, for which there are already prototypes but no actual functions just yet and are now called when the device is reset and during probe/cleanup of the driver. The down and up flows via ioctl calls has similarly been updated. In addition, there are two other bugs in the reset flow - one in the logic for determining whether to schedule a device reset upon receiving an uncorrectable AER event which prevents the reset flow from being initiated, and another with clearing the status bit indicating a device is configured (when resetting the device the configuration remains across the reset so the bit should not be cleared, otherwise, the necessary services will not be re-started in adf_dev_start() after the reset - clear the bit only when actually deleting the configuration). Signed-off-by: Bruce Allan Signed-off-by: Herbert Xu --- .../crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c | 19 ++++++++++ drivers/crypto/qat/qat_dh895xcc/adf_drv.c | 42 ++++++---------------- 2 files changed, 30 insertions(+), 31 deletions(-) (limited to 'drivers/crypto/qat/qat_dh895xcc') diff --git a/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c b/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c index ef05825cc651..6a735d5c0e37 100644 --- a/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c +++ b/drivers/crypto/qat/qat_dh895xcc/adf_dh895xcc_hw_data.c @@ -46,6 +46,7 @@ */ #include #include "adf_dh895xcc_hw_data.h" +#include "adf_common_drv.h" #include "adf_drv.h" /* Worker thread to service arbiter mappings based on dev SKUs */ @@ -182,6 +183,19 @@ static void adf_enable_error_correction(struct adf_accel_dev *accel_dev) } } +static void adf_enable_ints(struct adf_accel_dev *accel_dev) +{ + void __iomem *addr; + + addr = (&GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR])->virt_addr; + + /* Enable bundle and misc interrupts */ + ADF_CSR_WR(addr, ADF_DH895XCC_SMIAPF0_MASK_OFFSET, + ADF_DH895XCC_SMIA0_MASK); + ADF_CSR_WR(addr, ADF_DH895XCC_SMIAPF1_MASK_OFFSET, + ADF_DH895XCC_SMIA1_MASK); +} + void adf_init_hw_data_dh895xcc(struct adf_hw_device_data *hw_data) { hw_data->dev_class = &dh895xcc_class; @@ -206,6 +220,11 @@ void adf_init_hw_data_dh895xcc(struct adf_hw_device_data *hw_data) hw_data->get_misc_bar_id = get_misc_bar_id; hw_data->get_sku = get_sku; hw_data->fw_name = ADF_DH895XCC_FW; + hw_data->init_admin_comms = adf_init_admin_comms; + hw_data->exit_admin_comms = adf_exit_admin_comms; + hw_data->init_arb = adf_init_arb; + hw_data->exit_arb = adf_exit_arb; + hw_data->enable_ints = adf_enable_ints; } void adf_clean_hw_data_dh895xcc(struct adf_hw_device_data *hw_data) diff --git a/drivers/crypto/qat/qat_dh895xcc/adf_drv.c b/drivers/crypto/qat/qat_dh895xcc/adf_drv.c index 948f66be262b..8ffdb95c9804 100644 --- a/drivers/crypto/qat/qat_dh895xcc/adf_drv.c +++ b/drivers/crypto/qat/qat_dh895xcc/adf_drv.c @@ -90,9 +90,7 @@ static void adf_cleanup_accel(struct adf_accel_dev *accel_dev) struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev; int i; - adf_exit_admin_comms(accel_dev); - adf_exit_arb(accel_dev); - adf_cleanup_etr_data(accel_dev); + adf_dev_shutdown(accel_dev); for (i = 0; i < ADF_PCI_MAX_BARS; i++) { struct adf_bar *bar = &accel_pci_dev->pci_bars[i]; @@ -119,7 +117,7 @@ static void adf_cleanup_accel(struct adf_accel_dev *accel_dev) kfree(accel_dev); } -static int qat_dev_start(struct adf_accel_dev *accel_dev) +static int adf_dev_configure(struct adf_accel_dev *accel_dev) { int cpus = num_online_cpus(); int banks = GET_MAX_BANKS(accel_dev); @@ -206,7 +204,7 @@ static int qat_dev_start(struct adf_accel_dev *accel_dev) goto err; set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status); - return adf_dev_start(accel_dev); + return 0; err: dev_err(&GET_DEV(accel_dev), "Failed to start QAT accel dev\n"); return -EINVAL; @@ -217,7 +215,6 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) struct adf_accel_dev *accel_dev; struct adf_accel_pci *accel_pci_dev; struct adf_hw_device_data *hw_data; - void __iomem *pmisc_bar_addr = NULL; char name[ADF_DEVICE_NAME_LENGTH]; unsigned int i, bar_nr; int ret; @@ -347,8 +344,6 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) ret = -EFAULT; goto out_err; } - if (i == ADF_DH895XCC_PMISC_BAR) - pmisc_bar_addr = bar->virt_addr; } pci_set_master(pdev); @@ -358,36 +353,21 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto out_err; } - if (adf_init_etr_data(accel_dev)) { - dev_err(&pdev->dev, "Failed initialize etr\n"); - ret = -EFAULT; - goto out_err; - } - - if (adf_init_admin_comms(accel_dev)) { - dev_err(&pdev->dev, "Failed initialize admin comms\n"); - ret = -EFAULT; - goto out_err; - } - - if (adf_init_arb(accel_dev)) { - dev_err(&pdev->dev, "Failed initialize hw arbiter\n"); - ret = -EFAULT; - goto out_err; - } if (pci_save_state(pdev)) { dev_err(&pdev->dev, "Failed to save pci state\n"); ret = -ENOMEM; goto out_err; } - /* Enable bundle and misc interrupts */ - ADF_CSR_WR(pmisc_bar_addr, ADF_DH895XCC_SMIAPF0_MASK_OFFSET, - ADF_DH895XCC_SMIA0_MASK); - ADF_CSR_WR(pmisc_bar_addr, ADF_DH895XCC_SMIAPF1_MASK_OFFSET, - ADF_DH895XCC_SMIA1_MASK); + ret = adf_dev_configure(accel_dev); + if (ret) + goto out_err; + + ret = adf_dev_init(accel_dev); + if (ret) + goto out_err; - ret = qat_dev_start(accel_dev); + ret = adf_dev_start(accel_dev); if (ret) { adf_dev_stop(accel_dev); goto out_err; -- cgit v1.2.3