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|
/*
* drivers/pci/pcie/aer/aerdrv_core.c
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* This file implements the core part of PCI-Express AER. When an pci-express
* error is delivered, an error message will be collected and printed to
* console, then, an error recovery procedure will be executed by following
* the pci error recovery rules.
*
* Copyright (C) 2006 Intel Corp.
* Tom Long Nguyen (tom.l.nguyen@intel.com)
* Zhang Yanmin (yanmin.zhang@intel.com)
*
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/pm.h>
#include <linux/suspend.h>
#include <linux/delay.h>
#include "aerdrv.h"
static int forceload;
static int nosourceid;
module_param(forceload, bool, 0);
module_param(nosourceid, bool, 0);
int pci_enable_pcie_error_reporting(struct pci_dev *dev)
{
u16 reg16 = 0;
int pos;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (!pos)
return -EIO;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos)
return -EIO;
pci_read_config_word(dev, pos+PCI_EXP_DEVCTL, ®16);
reg16 = reg16 |
PCI_EXP_DEVCTL_CERE |
PCI_EXP_DEVCTL_NFERE |
PCI_EXP_DEVCTL_FERE |
PCI_EXP_DEVCTL_URRE;
pci_write_config_word(dev, pos+PCI_EXP_DEVCTL, reg16);
return 0;
}
EXPORT_SYMBOL_GPL(pci_enable_pcie_error_reporting);
int pci_disable_pcie_error_reporting(struct pci_dev *dev)
{
u16 reg16 = 0;
int pos;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos)
return -EIO;
pci_read_config_word(dev, pos+PCI_EXP_DEVCTL, ®16);
reg16 = reg16 & ~(PCI_EXP_DEVCTL_CERE |
PCI_EXP_DEVCTL_NFERE |
PCI_EXP_DEVCTL_FERE |
PCI_EXP_DEVCTL_URRE);
pci_write_config_word(dev, pos+PCI_EXP_DEVCTL, reg16);
return 0;
}
EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
int pos;
u32 status, mask;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (!pos)
return -EIO;
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
if (dev->error_state == pci_channel_io_normal)
status &= ~mask; /* Clear corresponding nonfatal bits */
else
status &= mask; /* Clear corresponding fatal bits */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
return 0;
}
EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
#if 0
int pci_cleanup_aer_correct_error_status(struct pci_dev *dev)
{
int pos;
u32 status;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (!pos)
return -EIO;
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, status);
return 0;
}
#endif /* 0 */
static int set_device_error_reporting(struct pci_dev *dev, void *data)
{
bool enable = *((bool *)data);
if (dev->pcie_type == PCIE_RC_PORT ||
dev->pcie_type == PCIE_SW_UPSTREAM_PORT ||
dev->pcie_type == PCIE_SW_DOWNSTREAM_PORT) {
if (enable)
pci_enable_pcie_error_reporting(dev);
else
pci_disable_pcie_error_reporting(dev);
}
if (enable)
pcie_set_ecrc_checking(dev);
return 0;
}
/**
* set_downstream_devices_error_reporting - enable/disable the error reporting bits on the root port and its downstream ports.
* @dev: pointer to root port's pci_dev data structure
* @enable: true = enable error reporting, false = disable error reporting.
*/
static void set_downstream_devices_error_reporting(struct pci_dev *dev,
bool enable)
{
set_device_error_reporting(dev, &enable);
if (!dev->subordinate)
return;
pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
}
static inline int compare_device_id(struct pci_dev *dev,
struct aer_err_info *e_info)
{
if (e_info->id == ((dev->bus->number << 8) | dev->devfn)) {
/*
* Device ID match
*/
return 1;
}
return 0;
}
static int add_error_device(struct aer_err_info *e_info, struct pci_dev *dev)
{
if (e_info->error_dev_num < AER_MAX_MULTI_ERR_DEVICES) {
e_info->dev[e_info->error_dev_num] = dev;
e_info->error_dev_num++;
return 1;
}
return 0;
}
#define PCI_BUS(x) (((x) >> 8) & 0xff)
static int find_device_iter(struct pci_dev *dev, void *data)
{
int pos;
u32 status;
u32 mask;
u16 reg16;
int result;
struct aer_err_info *e_info = (struct aer_err_info *)data;
/*
* When bus id is equal to 0, it might be a bad id
* reported by root port.
*/
if (!nosourceid && (PCI_BUS(e_info->id) != 0)) {
result = compare_device_id(dev, e_info);
if (result)
add_error_device(e_info, dev);
/*
* If there is no multiple error, we stop
* or continue based on the id comparing.
*/
if (!(e_info->flags & AER_MULTI_ERROR_VALID_FLAG))
return result;
/*
* If there are multiple errors and id does match,
* We need continue to search other devices under
* the root port. Return 0 means that.
*/
if (result)
return 0;
}
/*
* When either
* 1) nosourceid==y;
* 2) bus id is equal to 0. Some ports might lose the bus
* id of error source id;
* 3) There are multiple errors and prior id comparing fails;
* We check AER status registers to find the initial reporter.
*/
if (atomic_read(&dev->enable_cnt) == 0)
return 0;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos)
return 0;
/* Check if AER is enabled */
pci_read_config_word(dev, pos+PCI_EXP_DEVCTL, ®16);
if (!(reg16 & (
PCI_EXP_DEVCTL_CERE |
PCI_EXP_DEVCTL_NFERE |
PCI_EXP_DEVCTL_FERE |
PCI_EXP_DEVCTL_URRE)))
return 0;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (!pos)
return 0;
status = 0;
mask = 0;
if (e_info->severity == AER_CORRECTABLE) {
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &mask);
if (status & ~mask) {
add_error_device(e_info, dev);
goto added;
}
} else {
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
if (status & ~mask) {
add_error_device(e_info, dev);
goto added;
}
}
return 0;
added:
if (e_info->flags & AER_MULTI_ERROR_VALID_FLAG)
return 0;
else
return 1;
}
/**
* find_source_device - search through device hierarchy for source device
* @parent: pointer to Root Port pci_dev data structure
* @err_info: including detailed error information such like id
*
* Invoked when error is detected at the Root Port.
*/
static void find_source_device(struct pci_dev *parent,
struct aer_err_info *e_info)
{
struct pci_dev *dev = parent;
int result;
/* Is Root Port an agent that sends error message? */
result = find_device_iter(dev, e_info);
if (result)
return;
pci_walk_bus(parent->subordinate, find_device_iter, e_info);
}
static int report_error_detected(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
struct aer_broadcast_data *result_data;
result_data = (struct aer_broadcast_data *) data;
dev->error_state = result_data->state;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->error_detected) {
if (result_data->state == pci_channel_io_frozen &&
!(dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)) {
/*
* In case of fatal recovery, if one of down-
* stream device has no driver. We might be
* unable to recover because a later insmod
* of a driver for this device is unaware of
* its hw state.
*/
dev_printk(KERN_DEBUG, &dev->dev, "device has %s\n",
dev->driver ?
"no AER-aware driver" : "no driver");
}
return 0;
}
err_handler = dev->driver->err_handler;
vote = err_handler->error_detected(dev, result_data->state);
result_data->result = merge_result(result_data->result, vote);
return 0;
}
static int report_mmio_enabled(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
struct aer_broadcast_data *result_data;
result_data = (struct aer_broadcast_data *) data;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->mmio_enabled)
return 0;
err_handler = dev->driver->err_handler;
vote = err_handler->mmio_enabled(dev);
result_data->result = merge_result(result_data->result, vote);
return 0;
}
static int report_slot_reset(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
struct aer_broadcast_data *result_data;
result_data = (struct aer_broadcast_data *) data;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->slot_reset)
return 0;
err_handler = dev->driver->err_handler;
vote = err_handler->slot_reset(dev);
result_data->result = merge_result(result_data->result, vote);
return 0;
}
static int report_resume(struct pci_dev *dev, void *data)
{
struct pci_error_handlers *err_handler;
dev->error_state = pci_channel_io_normal;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->resume)
return 0;
err_handler = dev->driver->err_handler;
err_handler->resume(dev);
return 0;
}
/**
* broadcast_error_message - handle message broadcast to downstream drivers
* @dev: pointer to from where in a hierarchy message is broadcasted down
* @state: error state
* @error_mesg: message to print
* @cb: callback to be broadcasted
*
* Invoked during error recovery process. Once being invoked, the content
* of error severity will be broadcasted to all downstream drivers in a
* hierarchy in question.
*/
static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
enum pci_channel_state state,
char *error_mesg,
int (*cb)(struct pci_dev *, void *))
{
struct aer_broadcast_data result_data;
dev_printk(KERN_DEBUG, &dev->dev, "broadcast %s message\n", error_mesg);
result_data.state = state;
if (cb == report_error_detected)
result_data.result = PCI_ERS_RESULT_CAN_RECOVER;
else
result_data.result = PCI_ERS_RESULT_RECOVERED;
if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE) {
/*
* If the error is reported by a bridge, we think this error
* is related to the downstream link of the bridge, so we
* do error recovery on all subordinates of the bridge instead
* of the bridge and clear the error status of the bridge.
*/
if (cb == report_error_detected)
dev->error_state = state;
pci_walk_bus(dev->subordinate, cb, &result_data);
if (cb == report_resume) {
pci_cleanup_aer_uncorrect_error_status(dev);
dev->error_state = pci_channel_io_normal;
}
} else {
/*
* If the error is reported by an end point, we think this
* error is related to the upstream link of the end point.
*/
pci_walk_bus(dev->bus, cb, &result_data);
}
return result_data.result;
}
struct find_aer_service_data {
struct pcie_port_service_driver *aer_driver;
int is_downstream;
};
static int find_aer_service_iter(struct device *device, void *data)
{
struct device_driver *driver;
struct pcie_port_service_driver *service_driver;
struct find_aer_service_data *result;
result = (struct find_aer_service_data *) data;
if (device->bus == &pcie_port_bus_type) {
struct pcie_port_data *port_data;
port_data = pci_get_drvdata(to_pcie_device(device)->port);
if (port_data->port_type == PCIE_SW_DOWNSTREAM_PORT)
result->is_downstream = 1;
driver = device->driver;
if (driver) {
service_driver = to_service_driver(driver);
if (service_driver->service == PCIE_PORT_SERVICE_AER) {
result->aer_driver = service_driver;
return 1;
}
}
}
return 0;
}
static void find_aer_service(struct pci_dev *dev,
struct find_aer_service_data *data)
{
int retval;
retval = device_for_each_child(&dev->dev, data, find_aer_service_iter);
}
static pci_ers_result_t reset_link(struct pcie_device *aerdev,
struct pci_dev *dev)
{
struct pci_dev *udev;
pci_ers_result_t status;
struct find_aer_service_data data;
if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)
udev = dev;
else
udev = dev->bus->self;
data.is_downstream = 0;
data.aer_driver = NULL;
find_aer_service(udev, &data);
/*
* Use the aer driver of the error agent firstly.
* If it hasn't the aer driver, use the root port's
*/
if (!data.aer_driver || !data.aer_driver->reset_link) {
if (data.is_downstream &&
aerdev->device.driver &&
to_service_driver(aerdev->device.driver)->reset_link) {
data.aer_driver =
to_service_driver(aerdev->device.driver);
} else {
dev_printk(KERN_DEBUG, &dev->dev, "no link-reset "
"support\n");
return PCI_ERS_RESULT_DISCONNECT;
}
}
status = data.aer_driver->reset_link(udev);
if (status != PCI_ERS_RESULT_RECOVERED) {
dev_printk(KERN_DEBUG, &dev->dev, "link reset at upstream "
"device %s failed\n", pci_name(udev));
return PCI_ERS_RESULT_DISCONNECT;
}
return status;
}
/**
* do_recovery - handle nonfatal/fatal error recovery process
* @aerdev: pointer to a pcie_device data structure of root port
* @dev: pointer to a pci_dev data structure of agent detecting an error
* @severity: error severity type
*
* Invoked when an error is nonfatal/fatal. Once being invoked, broadcast
* error detected message to all downstream drivers within a hierarchy in
* question and return the returned code.
*/
static pci_ers_result_t do_recovery(struct pcie_device *aerdev,
struct pci_dev *dev,
int severity)
{
pci_ers_result_t status, result = PCI_ERS_RESULT_RECOVERED;
enum pci_channel_state state;
if (severity == AER_FATAL)
state = pci_channel_io_frozen;
else
state = pci_channel_io_normal;
status = broadcast_error_message(dev,
state,
"error_detected",
report_error_detected);
if (severity == AER_FATAL) {
result = reset_link(aerdev, dev);
if (result != PCI_ERS_RESULT_RECOVERED) {
/* TODO: Should panic here? */
return result;
}
}
if (status == PCI_ERS_RESULT_CAN_RECOVER)
status = broadcast_error_message(dev,
state,
"mmio_enabled",
report_mmio_enabled);
if (status == PCI_ERS_RESULT_NEED_RESET) {
/*
* TODO: Should call platform-specific
* functions to reset slot before calling
* drivers' slot_reset callbacks?
*/
status = broadcast_error_message(dev,
state,
"slot_reset",
report_slot_reset);
}
if (status == PCI_ERS_RESULT_RECOVERED)
broadcast_error_message(dev,
state,
"resume",
report_resume);
return status;
}
/**
* handle_error_source - handle logging error into an event log
* @aerdev: pointer to pcie_device data structure of the root port
* @dev: pointer to pci_dev data structure of error source device
* @info: comprehensive error information
*
* Invoked when an error being detected by Root Port.
*/
static void handle_error_source(struct pcie_device *aerdev,
struct pci_dev *dev,
struct aer_err_info *info)
{
pci_ers_result_t status = 0;
int pos;
if (info->severity == AER_CORRECTABLE) {
/*
* Correctable error does not need software intevention.
* No need to go through error recovery process.
*/
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (pos)
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS,
info->status);
} else {
status = do_recovery(aerdev, dev, info->severity);
if (status == PCI_ERS_RESULT_RECOVERED) {
dev_printk(KERN_DEBUG, &dev->dev, "AER driver "
"successfully recovered\n");
} else {
/* TODO: Should kernel panic here? */
dev_printk(KERN_DEBUG, &dev->dev, "AER driver didn't "
"recover\n");
}
}
}
/**
* aer_enable_rootport - enable Root Port's interrupts when receiving messages
* @rpc: pointer to a Root Port data structure
*
* Invoked when PCIE bus loads AER service driver.
*/
void aer_enable_rootport(struct aer_rpc *rpc)
{
struct pci_dev *pdev = rpc->rpd->port;
int pos, aer_pos;
u16 reg16;
u32 reg32;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
/* Clear PCIE Capability's Device Status */
pci_read_config_word(pdev, pos+PCI_EXP_DEVSTA, ®16);
pci_write_config_word(pdev, pos+PCI_EXP_DEVSTA, reg16);
/* Disable system error generation in response to error messages */
pci_read_config_word(pdev, pos + PCI_EXP_RTCTL, ®16);
reg16 &= ~(SYSTEM_ERROR_INTR_ON_MESG_MASK);
pci_write_config_word(pdev, pos + PCI_EXP_RTCTL, reg16);
aer_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
/* Clear error status */
pci_read_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, ®32);
pci_write_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, reg32);
pci_read_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, ®32);
pci_write_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, reg32);
pci_read_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, ®32);
pci_write_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, reg32);
/*
* Enable error reporting for the root port device and downstream port
* devices.
*/
set_downstream_devices_error_reporting(pdev, true);
/* Enable Root Port's interrupt in response to error messages */
pci_write_config_dword(pdev,
aer_pos + PCI_ERR_ROOT_COMMAND,
ROOT_PORT_INTR_ON_MESG_MASK);
}
/**
* disable_root_aer - disable Root Port's interrupts when receiving messages
* @rpc: pointer to a Root Port data structure
*
* Invoked when PCIE bus unloads AER service driver.
*/
static void disable_root_aer(struct aer_rpc *rpc)
{
struct pci_dev *pdev = rpc->rpd->port;
u32 reg32;
int pos;
/*
* Disable error reporting for the root port device and downstream port
* devices.
*/
set_downstream_devices_error_reporting(pdev, false);
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
/* Disable Root's interrupt in response to error messages */
pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_COMMAND, 0);
/* Clear Root's error status reg */
pci_read_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, ®32);
pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, reg32);
}
/**
* get_e_source - retrieve an error source
* @rpc: pointer to the root port which holds an error
*
* Invoked by DPC handler to consume an error.
*/
static struct aer_err_source *get_e_source(struct aer_rpc *rpc)
{
struct aer_err_source *e_source;
unsigned long flags;
/* Lock access to Root error producer/consumer index */
spin_lock_irqsave(&rpc->e_lock, flags);
if (rpc->prod_idx == rpc->cons_idx) {
spin_unlock_irqrestore(&rpc->e_lock, flags);
return NULL;
}
e_source = &rpc->e_sources[rpc->cons_idx];
rpc->cons_idx++;
if (rpc->cons_idx == AER_ERROR_SOURCES_MAX)
rpc->cons_idx = 0;
spin_unlock_irqrestore(&rpc->e_lock, flags);
return e_source;
}
static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
{
int pos, temp;
info->status = 0;
info->flags &= ~AER_TLP_HEADER_VALID_FLAG;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
/* The device might not support AER */
if (!pos)
return AER_SUCCESS;
if (info->severity == AER_CORRECTABLE) {
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
&info->status);
pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK,
&info->mask);
if (!(info->status & ~info->mask))
return AER_UNSUCCESS;
} else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
info->severity == AER_NONFATAL) {
/* Link is still healthy for IO reads */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&info->status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK,
&info->mask);
if (!(info->status & ~info->mask))
return AER_UNSUCCESS;
/* Get First Error Pointer */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &temp);
info->first = PCI_ERR_CAP_FEP(temp);
if (info->status & AER_LOG_TLP_MASKS) {
info->flags |= AER_TLP_HEADER_VALID_FLAG;
pci_read_config_dword(dev,
pos + PCI_ERR_HEADER_LOG, &info->tlp.dw0);
pci_read_config_dword(dev,
pos + PCI_ERR_HEADER_LOG + 4, &info->tlp.dw1);
pci_read_config_dword(dev,
pos + PCI_ERR_HEADER_LOG + 8, &info->tlp.dw2);
pci_read_config_dword(dev,
pos + PCI_ERR_HEADER_LOG + 12, &info->tlp.dw3);
}
}
return AER_SUCCESS;
}
static inline void aer_process_err_devices(struct pcie_device *p_device,
struct aer_err_info *e_info)
{
int i;
if (!e_info->dev[0]) {
dev_printk(KERN_DEBUG, &p_device->port->dev,
"can't find device of ID%04x\n",
e_info->id);
}
for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
if (get_device_error_info(e_info->dev[i], e_info) ==
AER_SUCCESS) {
aer_print_error(e_info->dev[i], e_info);
handle_error_source(p_device,
e_info->dev[i],
e_info);
}
}
}
/**
* aer_isr_one_error - consume an error detected by root port
* @p_device: pointer to error root port service device
* @e_src: pointer to an error source
*/
static void aer_isr_one_error(struct pcie_device *p_device,
struct aer_err_source *e_src)
{
struct aer_err_info *e_info;
int i;
/* struct aer_err_info might be big, so we allocate it with slab */
e_info = kmalloc(sizeof(struct aer_err_info), GFP_KERNEL);
if (e_info == NULL) {
dev_printk(KERN_DEBUG, &p_device->port->dev,
"Can't allocate mem when processing AER errors\n");
return;
}
/*
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.
*/
for (i = 1; i & ROOT_ERR_STATUS_MASKS ; i <<= 2) {
if (i > 4)
break;
if (!(e_src->status & i))
continue;
memset(e_info, 0, sizeof(struct aer_err_info));
/* Init comprehensive error information */
if (i & PCI_ERR_ROOT_COR_RCV) {
e_info->id = ERR_COR_ID(e_src->id);
e_info->severity = AER_CORRECTABLE;
} else {
e_info->id = ERR_UNCOR_ID(e_src->id);
e_info->severity = ((e_src->status >> 6) & 1);
}
if (e_src->status &
(PCI_ERR_ROOT_MULTI_COR_RCV |
PCI_ERR_ROOT_MULTI_UNCOR_RCV))
e_info->flags |= AER_MULTI_ERROR_VALID_FLAG;
find_source_device(p_device->port, e_info);
aer_process_err_devices(p_device, e_info);
}
kfree(e_info);
}
/**
* aer_isr - consume errors detected by root port
* @work: definition of this work item
*
* Invoked, as DPC, when root port records new detected error
*/
void aer_isr(struct work_struct *work)
{
struct aer_rpc *rpc = container_of(work, struct aer_rpc, dpc_handler);
struct pcie_device *p_device = rpc->rpd;
struct aer_err_source *e_src;
mutex_lock(&rpc->rpc_mutex);
e_src = get_e_source(rpc);
while (e_src) {
aer_isr_one_error(p_device, e_src);
e_src = get_e_source(rpc);
}
mutex_unlock(&rpc->rpc_mutex);
wake_up(&rpc->wait_release);
}
/**
* aer_delete_rootport - disable root port aer and delete service data
* @rpc: pointer to a root port device being deleted
*
* Invoked when AER service unloaded on a specific Root Port
*/
void aer_delete_rootport(struct aer_rpc *rpc)
{
/* Disable root port AER itself */
disable_root_aer(rpc);
kfree(rpc);
}
/**
* aer_init - provide AER initialization
* @dev: pointer to AER pcie device
*
* Invoked when AER service driver is loaded.
*/
int aer_init(struct pcie_device *dev)
{
if (aer_osc_setup(dev) && !forceload)
return -ENXIO;
return AER_SUCCESS;
}
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