#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)
{
#endif /* 0 */
-static void set_device_error_reporting(struct pci_dev *dev, void *data)
+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)
- return;
+ 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)
- pci_enable_pcie_error_reporting(dev);
- else
- pci_disable_pcie_error_reporting(dev);
+ pcie_set_ecrc_checking(dev);
+
+ return 0;
}
/**
pci_walk_bus(dev->subordinate, set_device_error_reporting, &enable);
}
-static int find_device_iter(struct device *device, void *data)
+static inline int compare_device_id(struct pci_dev *dev,
+ struct aer_err_info *e_info)
{
- struct pci_dev *dev;
- u16 id = *(unsigned long *)data;
- u8 secondary, subordinate, d_bus = id >> 8;
+ if (e_info->id == ((dev->bus->number << 8) | dev->devfn)) {
+ /*
+ * Device ID match
+ */
+ return 1;
+ }
- if (device->bus == &pci_bus_type) {
- dev = to_pci_dev(device);
- if (id == ((dev->bus->number << 8) | dev->devfn)) {
- /*
- * Device ID match
- */
- *(unsigned long*)data = (unsigned long)device;
- 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;
+ } else
+ 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 device is P2P, check if it is an upstream?
+ * If there is no multiple error, we stop
+ * or continue based on the id comparing.
*/
- if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE) {
- pci_read_config_byte(dev, PCI_SECONDARY_BUS,
- &secondary);
- pci_read_config_byte(dev, PCI_SUBORDINATE_BUS,
- &subordinate);
- if (d_bus >= secondary && d_bus <= subordinate) {
- *(unsigned long*)data = (unsigned long)device;
- return 1;
- }
+ 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 & ERR_CORRECTABLE_ERROR_MASK & ~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 & ERR_UNCORRECTABLE_ERROR_MASK & ~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
- * @id: device ID of agent who sends an error message to this Root Port
+ * @err_info: including detailed error information such like id
*
* Invoked when error is detected at the Root Port.
*/
-static struct device* find_source_device(struct pci_dev *parent, u16 id)
+static void find_source_device(struct pci_dev *parent,
+ struct aer_err_info *e_info)
{
struct pci_dev *dev = parent;
- struct device *device;
- unsigned long device_addr;
- int status;
+ int result;
/* Is Root Port an agent that sends error message? */
- if (id == ((dev->bus->number << 8) | dev->devfn))
- return &dev->dev;
-
- do {
- device_addr = id;
- if ((status = device_for_each_child(&dev->dev,
- &device_addr, find_device_iter))) {
- device = (struct device*)device_addr;
- dev = to_pci_dev(device);
- if (id == ((dev->bus->number << 8) | dev->devfn))
- return device;
- }
- }while (status);
+ result = find_device_iter(dev, e_info);
+ if (result)
+ return;
- return NULL;
+ pci_walk_bus(parent->subordinate, find_device_iter, e_info);
}
-static void report_error_detected(struct pci_dev *dev, void *data)
+static int report_error_detected(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
dev->driver ?
"no AER-aware driver" : "no driver");
}
- return;
+ 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;
+ return 0;
}
-static void report_mmio_enabled(struct pci_dev *dev, void *data)
+static int report_mmio_enabled(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->mmio_enabled)
- return;
+ return 0;
err_handler = dev->driver->err_handler;
vote = err_handler->mmio_enabled(dev);
result_data->result = merge_result(result_data->result, vote);
- return;
+ return 0;
}
-static void report_slot_reset(struct pci_dev *dev, void *data)
+static int report_slot_reset(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote;
struct pci_error_handlers *err_handler;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->slot_reset)
- return;
+ return 0;
err_handler = dev->driver->err_handler;
vote = err_handler->slot_reset(dev);
result_data->result = merge_result(result_data->result, vote);
- return;
+ return 0;
}
-static void report_resume(struct pci_dev *dev, void *data)
+static int report_resume(struct pci_dev *dev, void *data)
{
struct pci_error_handlers *err_handler;
if (!dev->driver ||
!dev->driver->err_handler ||
!dev->driver->err_handler->resume)
- return;
+ return 0;
err_handler = dev->driver->err_handler;
err_handler->resume(dev);
- return;
+ return 0;
}
/**
static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
enum pci_channel_state state,
char *error_mesg,
- void (*cb)(struct pci_dev *, void *))
+ int (*cb)(struct pci_dev *, void *))
{
struct aer_broadcast_data result_data;
*/
static void handle_error_source(struct pcie_device * aerdev,
struct pci_dev *dev,
- struct aer_err_info info)
+ struct aer_err_info *info)
{
pci_ers_result_t status = 0;
int pos;
- if (info.severity == AER_CORRECTABLE) {
+ 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);
+ info->status);
} else {
- status = do_recovery(aerdev, dev, info.severity);
+ status = do_recovery(aerdev, dev, info->severity);
if (status == PCI_ERS_RESULT_RECOVERED) {
dev_printk(KERN_DEBUG, &dev->dev, "AER driver "
"successfully recovered\n");
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
static void aer_isr_one_error(struct pcie_device *p_device,
struct aer_err_source *e_src)
{
- struct device *s_device;
- struct aer_err_info e_info = {0, 0, 0,};
+ struct aer_err_info *e_info;
int i;
- u16 id;
+
+ /* 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
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) {
- id = ERR_COR_ID(e_src->id);
- e_info.severity = AER_CORRECTABLE;
+ e_info->id = ERR_COR_ID(e_src->id);
+ e_info->severity = AER_CORRECTABLE;
} else {
- id = ERR_UNCOR_ID(e_src->id);
- e_info.severity = ((e_src->status >> 6) & 1);
+ 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;
- if (!(s_device = find_source_device(p_device->port, id))) {
- printk(KERN_DEBUG "%s->can't find device of ID%04x\n",
- __func__, id);
- continue;
- }
- if (get_device_error_info(to_pci_dev(s_device), &e_info) ==
- AER_SUCCESS) {
- aer_print_error(to_pci_dev(s_device), &e_info);
- handle_error_source(p_device,
- to_pci_dev(s_device),
- e_info);
- }
+ 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);
}
/**
projects / mv-sheeva.git / blobdiff