From 4bf3392e0bf55e5aabbd7bbdbc52cc58eb63f837 Mon Sep 17 00:00:00 2001 From: "Zhang, Yanmin" Date: Mon, 31 Jul 2006 15:26:16 +0800 Subject: [PATCH] PCI-Express AER implemetation: pcie_portdrv error handler Patch 4 implements error handlers for pcie_portdrv. Signed-off-by: Zhang Yanmin Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pcie/portdrv_pci.c | 196 +++++++++++++++++++++++++++++---- 1 file changed, 175 insertions(+), 21 deletions(-) diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index 3284199ce396..e4a2429986f0 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -14,8 +14,10 @@ #include #include #include +#include #include "portdrv.h" +#include "aer/aerdrv.h" /* * Version Information @@ -30,6 +32,43 @@ MODULE_LICENSE("GPL"); /* global data */ static const char device_name[] = "pcieport-driver"; +static int pcie_portdrv_save_config(struct pci_dev *dev) +{ + return pci_save_state(dev); +} + +#ifdef CONFIG_PM +static int pcie_portdrv_restore_config(struct pci_dev *dev) +{ + int retval; + + pci_restore_state(dev); + retval = pci_enable_device(dev); + if (retval) + return retval; + pci_set_master(dev); + return 0; +} + +static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state) +{ + int ret = pcie_port_device_suspend(dev, state); + + if (!ret) + ret = pcie_portdrv_save_config(dev); + return ret; +} + +static int pcie_portdrv_resume(struct pci_dev *dev) +{ + pcie_portdrv_restore_config(dev); + return pcie_port_device_resume(dev); +} +#else +#define pcie_portdrv_suspend NULL +#define pcie_portdrv_resume NULL +#endif + /* * pcie_portdrv_probe - Probe PCI-Express port devices * @dev: PCI-Express port device being probed @@ -61,6 +100,10 @@ static int __devinit pcie_portdrv_probe (struct pci_dev *dev, return -ENOMEM; } + pcie_portdrv_save_config(dev); + + pci_enable_pcie_error_reporting(dev); + return 0; } @@ -70,39 +113,143 @@ static void pcie_portdrv_remove (struct pci_dev *dev) kfree(pci_get_drvdata(dev)); } -#ifdef CONFIG_PM -static int pcie_portdrv_save_config(struct pci_dev *dev) +static int error_detected_iter(struct device *device, void *data) { - return pci_save_state(dev); + struct pcie_device *pcie_device; + struct pcie_port_service_driver *driver; + struct aer_broadcast_data *result_data; + pci_ers_result_t status; + + result_data = (struct aer_broadcast_data *) data; + + if (device->bus == &pcie_port_bus_type && device->driver) { + driver = to_service_driver(device->driver); + if (!driver || + !driver->err_handler || + !driver->err_handler->error_detected) + return 0; + + pcie_device = to_pcie_device(device); + + /* Forward error detected message to service drivers */ + status = driver->err_handler->error_detected( + pcie_device->port, + result_data->state); + result_data->result = + merge_result(result_data->result, status); + } + + return 0; } -static int pcie_portdrv_restore_config(struct pci_dev *dev) +static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, + enum pci_channel_state error) { - int retval; + struct aer_broadcast_data result_data = + {error, PCI_ERS_RESULT_CAN_RECOVER}; + + device_for_each_child(&dev->dev, &result_data, error_detected_iter); + + return result_data.result; +} + +static int mmio_enabled_iter(struct device *device, void *data) +{ + struct pcie_device *pcie_device; + struct pcie_port_service_driver *driver; + pci_ers_result_t status, *result; + + result = (pci_ers_result_t *) data; + + if (device->bus == &pcie_port_bus_type && device->driver) { + driver = to_service_driver(device->driver); + if (driver && + driver->err_handler && + driver->err_handler->mmio_enabled) { + pcie_device = to_pcie_device(device); + + /* Forward error message to service drivers */ + status = driver->err_handler->mmio_enabled( + pcie_device->port); + *result = merge_result(*result, status); + } + } - pci_restore_state(dev); - retval = pci_enable_device(dev); - if (retval) - return retval; - pci_set_master(dev); return 0; } -static int pcie_portdrv_suspend (struct pci_dev *dev, pm_message_t state) +static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) { - int ret = pcie_port_device_suspend(dev, state); + pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; - if (!ret) - ret = pcie_portdrv_save_config(dev); - return ret; + device_for_each_child(&dev->dev, &status, mmio_enabled_iter); + return status; } -static int pcie_portdrv_resume (struct pci_dev *dev) +static int slot_reset_iter(struct device *device, void *data) { - pcie_portdrv_restore_config(dev); - return pcie_port_device_resume(dev); + struct pcie_device *pcie_device; + struct pcie_port_service_driver *driver; + pci_ers_result_t status, *result; + + result = (pci_ers_result_t *) data; + + if (device->bus == &pcie_port_bus_type && device->driver) { + driver = to_service_driver(device->driver); + if (driver && + driver->err_handler && + driver->err_handler->slot_reset) { + pcie_device = to_pcie_device(device); + + /* Forward error message to service drivers */ + status = driver->err_handler->slot_reset( + pcie_device->port); + *result = merge_result(*result, status); + } + } + + return 0; +} + +static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) +{ + pci_ers_result_t status; + + /* If fatal, restore cfg space for possible link reset at upstream */ + if (dev->error_state == pci_channel_io_frozen) { + pcie_portdrv_restore_config(dev); + pci_enable_pcie_error_reporting(dev); + } + + device_for_each_child(&dev->dev, &status, slot_reset_iter); + + return status; +} + +static int resume_iter(struct device *device, void *data) +{ + struct pcie_device *pcie_device; + struct pcie_port_service_driver *driver; + + if (device->bus == &pcie_port_bus_type && device->driver) { + driver = to_service_driver(device->driver); + if (driver && + driver->err_handler && + driver->err_handler->resume) { + pcie_device = to_pcie_device(device); + + /* Forward error message to service drivers */ + driver->err_handler->resume(pcie_device->port); + } + } + + return 0; +} + +static void pcie_portdrv_err_resume(struct pci_dev *dev) +{ + device_for_each_child(&dev->dev, NULL, resume_iter); } -#endif /* * LINUX Device Driver Model @@ -114,6 +261,13 @@ static const struct pci_device_id port_pci_ids[] = { { }; MODULE_DEVICE_TABLE(pci, port_pci_ids); +static struct pci_error_handlers pcie_portdrv_err_handler = { + .error_detected = pcie_portdrv_error_detected, + .mmio_enabled = pcie_portdrv_mmio_enabled, + .slot_reset = pcie_portdrv_slot_reset, + .resume = pcie_portdrv_err_resume, +}; + static struct pci_driver pcie_portdrv = { .name = (char *)device_name, .id_table = &port_pci_ids[0], @@ -121,10 +275,10 @@ static struct pci_driver pcie_portdrv = { .probe = pcie_portdrv_probe, .remove = pcie_portdrv_remove, -#ifdef CONFIG_PM .suspend = pcie_portdrv_suspend, .resume = pcie_portdrv_resume, -#endif /* PM */ + + .err_handler = &pcie_portdrv_err_handler, }; static int __init pcie_portdrv_init(void) -- 2.30.2