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bus/pci: support sigbus handler

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This patch implements the ops for the PCI bus sigbus handler. It finds the
PCI device that is being hot-unplugged and calls the relevant ops of the
hot-unplug handler to handle the hot-unplug failure of the device.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
Acked-by: Shaopeng He <shaopeng.he@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
This commit is contained in:
Jeff Guo 2018-10-15 19:27:24 +08:00 committed by Thomas Monjalon
parent 538d974bcd
commit 5c96a29934
1 changed files with 54 additions and 0 deletions
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54
drivers/bus/pci/pci_common.c
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@ -403,6 +403,36 @@ pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
return NULL;
}
/*
* find the device which encounter the failure, by iterate over all device on
* PCI bus to check if the memory failure address is located in the range
* of the BARs of the device.
*/
static struct rte_pci_device *
pci_find_device_by_addr(const void *failure_addr)
{
struct rte_pci_device *pdev = NULL;
uint64_t check_point, start, end, len;
int i;
check_point = (uint64_t)(uintptr_t)failure_addr;
FOREACH_DEVICE_ON_PCIBUS(pdev) {
for (i = 0; i != RTE_DIM(pdev->mem_resource); i++) {
start = (uint64_t)(uintptr_t)pdev->mem_resource[i].addr;
len = pdev->mem_resource[i].len;
end = start + len;
if (check_point >= start && check_point < end) {
RTE_LOG(DEBUG, EAL, "Failure address %16.16"
PRIx64" belongs to device %s!\n",
check_point, pdev->device.name);
return pdev;
}
}
}
return NULL;
}
static int
pci_hot_unplug_handler(struct rte_device *dev)
{
@ -430,6 +460,29 @@ pci_hot_unplug_handler(struct rte_device *dev)
return ret;
}
static int
pci_sigbus_handler(const void *failure_addr)
{
struct rte_pci_device *pdev = NULL;
int ret = 0;
pdev = pci_find_device_by_addr(failure_addr);
if (!pdev) {
/* It is a generic sigbus error, no bus would handle it. */
ret = 1;
} else {
/* The sigbus error is caused of hot-unplug. */
ret = pci_hot_unplug_handler(&pdev->device);
if (ret) {
RTE_LOG(ERR, EAL,
"Failed to handle hot-unplug for device %s",
pdev->name);
ret = -1;
}
}
return ret;
}
static int
pci_plug(struct rte_device *dev)
{
@ -462,6 +515,7 @@ struct rte_pci_bus rte_pci_bus = {
.get_iommu_class = rte_pci_get_iommu_class,
.dev_iterate = rte_pci_dev_iterate,
.hot_unplug_handler = pci_hot_unplug_handler,
.sigbus_handler = pci_sigbus_handler,
},
.device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
.driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),