mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Zhang, Yanmin](/assets/img/avatar_default.png)
Patch 3 implements the core part of PCI-Express AER and aerdrv port service driver. When a root port service device is probed, the aerdrv will call request_irq to register irq handler for AER error interrupt. When a device sends an PCI-Express error message to the root port, the root port will trigger an interrupt, by either MSI or IO-APIC, then kernel would run the irq handler. The handler collects root error status register and schedules a work. The work will call the core part to process the error based on its type (Correctable/non-fatal/fatal). As for Correctable errors, the patch chooses to just clear the correctable error status register of the device. As for the non-fatal error, the patch follows generic PCI error handler rules to call the error callback functions of the endpoint's driver. If the device is a bridge, the patch chooses to broadcast the error to downstream devices. As for the fatal error, the patch resets the pci-express link and follows generic PCI error handler rules to call the error callback functions of the endpoint's driver. If the device is a bridge, the patch chooses to broadcast the error to downstream devices. Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
|
|
* File: pcieport_if.h
|
|
* Purpose: PCI Express Port Bus Driver's IF Data Structure
|
|
*
|
|
* Copyright (C) 2004 Intel
|
|
* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
|
|
*/
|
|
|
|
#ifndef _PCIEPORT_IF_H_
|
|
#define _PCIEPORT_IF_H_
|
|
|
|
/* Port Type */
|
|
#define PCIE_RC_PORT 4 /* Root port of RC */
|
|
#define PCIE_SW_UPSTREAM_PORT 5 /* Upstream port of Switch */
|
|
#define PCIE_SW_DOWNSTREAM_PORT 6 /* Downstream port of Switch */
|
|
#define PCIE_ANY_PORT 7
|
|
|
|
/* Service Type */
|
|
#define PCIE_PORT_SERVICE_PME 1 /* Power Management Event */
|
|
#define PCIE_PORT_SERVICE_AER 2 /* Advanced Error Reporting */
|
|
#define PCIE_PORT_SERVICE_HP 4 /* Native Hotplug */
|
|
#define PCIE_PORT_SERVICE_VC 8 /* Virtual Channel */
|
|
|
|
/* Root/Upstream/Downstream Port's Interrupt Mode */
|
|
#define PCIE_PORT_INTx_MODE 0
|
|
#define PCIE_PORT_MSI_MODE 1
|
|
#define PCIE_PORT_MSIX_MODE 2
|
|
|
|
struct pcie_port_service_id {
|
|
__u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
|
|
__u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
|
|
__u32 class, class_mask; /* (class,subclass,prog-if) triplet */
|
|
__u32 port_type, service_type; /* Port Entity */
|
|
kernel_ulong_t driver_data;
|
|
};
|
|
|
|
struct pcie_device {
|
|
int irq; /* Service IRQ/MSI/MSI-X Vector */
|
|
int interrupt_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
|
|
struct pcie_port_service_id id; /* Service ID */
|
|
struct pci_dev *port; /* Root/Upstream/Downstream Port */
|
|
void *priv_data; /* Service Private Data */
|
|
struct device device; /* Generic Device Interface */
|
|
};
|
|
#define to_pcie_device(d) container_of(d, struct pcie_device, device)
|
|
|
|
static inline void set_service_data(struct pcie_device *dev, void *data)
|
|
{
|
|
dev->priv_data = data;
|
|
}
|
|
|
|
static inline void* get_service_data(struct pcie_device *dev)
|
|
{
|
|
return dev->priv_data;
|
|
}
|
|
|
|
struct pcie_port_service_driver {
|
|
const char *name;
|
|
int (*probe) (struct pcie_device *dev,
|
|
const struct pcie_port_service_id *id);
|
|
void (*remove) (struct pcie_device *dev);
|
|
int (*suspend) (struct pcie_device *dev, pm_message_t state);
|
|
int (*resume) (struct pcie_device *dev);
|
|
|
|
/* Service Error Recovery Handler */
|
|
struct pci_error_handlers *err_handler;
|
|
|
|
/* Link Reset Capability - AER service driver specific */
|
|
pci_ers_result_t (*reset_link) (struct pci_dev *dev);
|
|
|
|
const struct pcie_port_service_id *id_table;
|
|
struct device_driver driver;
|
|
};
|
|
#define to_service_driver(d) \
|
|
container_of(d, struct pcie_port_service_driver, driver)
|
|
|
|
extern int pcie_port_service_register(struct pcie_port_service_driver *new);
|
|
extern void pcie_port_service_unregister(struct pcie_port_service_driver *new);
|
|
|
|
#endif /* _PCIEPORT_IF_H_ */
|