From: Prarit Bhargava <prarit@redhat.com> Date: Fri, 30 Oct 2009 12:47:28 -0400 Subject: [pci] aer: pcie support and compile fixes Message-id: <20091030124607.6431.23479.sendpatchset@prarit.bos.redhat.com> Patchwork-id: 21267 O-Subject: [RHEL5 PATCH 3/8]: AER: PCIE driver AER support and compile fixes [v2] Bugzilla: 517093 RH-Acked-by: Dean Nelson <dnelson@redhat.com> RH-Acked-by: Ivan Vecera <ivecera@redhat.com> RH-Acked-by: Andy Gospodarek <gospo@redhat.com> Based on upstream commit 4bf3392e0bf55e5aabbd7bbdbc52cc58eb63f837 These are the changes required for PCIE to support AER. Resolves BZ 517093. diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h index 1d317d2..3656e03 100644 --- a/drivers/pci/pcie/portdrv.h +++ b/drivers/pci/pcie/portdrv.h @@ -9,6 +9,8 @@ #ifndef _PORTDRV_H_ #define _PORTDRV_H_ +#include <linux/compiler.h> + #if !defined(PCI_CAP_ID_PME) #define PCI_CAP_ID_PME 1 #endif @@ -39,7 +41,7 @@ extern int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state); extern int pcie_port_device_resume(struct pci_dev *dev); #endif extern void pcie_port_device_remove(struct pci_dev *dev); -extern void pcie_port_bus_register(void); +extern int __must_check pcie_port_bus_register(void); extern void pcie_port_bus_unregister(void); #endif /* _PORTDRV_H_ */ diff --git a/drivers/pci/pcie/portdrv_bus.c b/drivers/pci/pcie/portdrv_bus.c index 3e84b50..359fe55 100644 --- a/drivers/pci/pcie/portdrv_bus.c +++ b/drivers/pci/pcie/portdrv_bus.c @@ -13,6 +13,7 @@ #include <linux/pm.h> #include <linux/pcieport_if.h> +#include "portdrv.h" static int pcie_port_bus_match(struct device *dev, struct device_driver *drv); static int pcie_port_bus_suspend(struct device *dev, pm_message_t state); @@ -24,6 +25,7 @@ struct bus_type pcie_port_bus_type = { .suspend = pcie_port_bus_suspend, .resume = pcie_port_bus_resume, }; +EXPORT_SYMBOL_GPL(pcie_port_bus_type); static int pcie_port_bus_match(struct device *dev, struct device_driver *drv) { diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 55c6622..6101a5b 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -23,20 +23,20 @@ static int pcie_port_probe_service(struct device *dev) { struct pcie_device *pciedev; struct pcie_port_service_driver *driver; - int status = -ENODEV; + int status; if (!dev || !dev->driver) - return status; + return -ENODEV; driver = to_service_driver(dev->driver); if (!driver || !driver->probe) - return status; + return -ENODEV; pciedev = to_pcie_device(dev); status = driver->probe(pciedev, driver->id_table); if (!status) { - printk(KERN_DEBUG "Load service driver %s on pcie device %s\n", - driver->name, dev->bus_id); + dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", + driver->name); get_device(dev); } return status; @@ -53,8 +53,8 @@ static int pcie_port_remove_service(struct device *dev) pciedev = to_pcie_device(dev); driver = to_service_driver(dev->driver); if (driver && driver->remove) { - printk(KERN_DEBUG "Unload service driver %s on pcie device %s\n", - driver->name, dev->bus_id); + dev_printk(KERN_DEBUG, dev, "unloading service driver %s\n", + driver->name); driver->remove(pciedev); put_device(dev); } @@ -103,7 +103,6 @@ static int pcie_port_resume_service(struct device *dev) */ static void release_pcie_device(struct device *dev) { - printk(KERN_DEBUG "Free Port Service[%s]\n", dev->bus_id); kfree(to_pcie_device(dev)); } @@ -150,7 +149,6 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask) if (pos) { struct msix_entry msix_entries[PCIE_PORT_DEVICE_MAXSERVICES] = {{0, 0}, {0, 1}, {0, 2}, {0, 3}}; - printk("%s Found MSIX capability\n", __FUNCTION__); status = pci_enable_msix(dev, msix_entries, nvec); if (!status) { int j = 0; @@ -165,7 +163,6 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask) if (status) { pos = pci_find_capability(dev, PCI_CAP_ID_MSI); if (pos) { - printk("%s Found MSI capability\n", __FUNCTION__); status = pci_enable_msi(dev); if (!status) { interrupt_mode = PCIE_PORT_MSI_MODE; @@ -253,7 +250,6 @@ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent, return NULL; pcie_device_init(parent, device, port_type, service_type, irq,irq_mode); - printk(KERN_DEBUG "Allocate Port Service[%s]\n", device->device.bus_id); return device; } @@ -402,9 +398,9 @@ void pcie_port_device_remove(struct pci_dev *dev) pci_disable_msi(dev); } -void pcie_port_bus_register(void) +int pcie_port_bus_register(void) { - bus_register(&pcie_port_bus_type); + return bus_register(&pcie_port_bus_type); } void pcie_port_bus_unregister(void) diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index 9b7b4ac..51a5266 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -14,8 +14,10 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/pcieport_if.h> +#include <linux/aer.h> #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 @@ -52,57 +91,165 @@ static int __devinit pcie_portdrv_probe (struct pci_dev *dev, pci_set_master(dev); if (!dev->irq && dev->pin) { - printk(KERN_WARNING - "%s->Dev[%04x:%04x] has invalid IRQ. Check vendor BIOS\n", - __FUNCTION__, dev->device, dev->vendor); + dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; " + "check vendor BIOS\n", dev->vendor, dev->device); } if (pcie_port_device_register(dev)) { pci_disable_device(dev); return -ENOMEM; } + pcie_portdrv_save_config(dev); + + pci_enable_pcie_error_reporting(dev); + return 0; } static void pcie_portdrv_remove (struct pci_dev *dev) { pcie_port_device_remove(dev); + pci_disable_device(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 = PCI_ERS_RESULT_NONE; + + /* 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 @@ -114,33 +261,45 @@ static const struct pci_device_id port_pci_ids[] = { { }; MODULE_DEVICE_TABLE(pci, port_pci_ids); -static struct pci_driver pcie_portdrv = { +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_portdriver = { .name = (char *)device_name, .id_table = &port_pci_ids[0], .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) { - int retval = 0; + int retval; - pcie_port_bus_register(); - retval = pci_register_driver(&pcie_portdrv); + retval = pcie_port_bus_register(); + if (retval) { + printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval); + goto out; + } + retval = pci_register_driver(&pcie_portdriver); if (retval) pcie_port_bus_unregister(); + out: return retval; } static void __exit pcie_portdrv_exit(void) { - pci_unregister_driver(&pcie_portdrv); + pci_unregister_driver(&pcie_portdriver); pcie_port_bus_unregister(); }