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habanalabs: PCIe Advanced Error Reporting support 

driver will now get notified upon any PCI error occurred and
will respond according to the severity of the error.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Ofir Bitton 2020-05-20 16:35:08 +03:00 committed by Oded Gabbay
parent 843839bec3
commit 2e5eda4681
1 changed files with 75 additions and 1 deletions
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76
drivers/misc/habanalabs/common/habanalabs_drv.c
View File

@ -11,6 +11,7 @@
#include "habanalabs.h"
#include <linux/pci.h>
#include <linux/aer.h>
#include <linux/module.h>
#define HL_DRIVER_AUTHOR "HabanaLabs Kernel Driver Team"
@ -408,6 +409,8 @@ static int hl_pci_probe(struct pci_dev *pdev,
pci_set_drvdata(pdev, hdev);
pci_enable_pcie_error_reporting(pdev);
rc = hl_device_init(hdev, hl_class);
if (rc) {
dev_err(&pdev->dev, "Fatal error during habanalabs device init\n");
@ -440,22 +443,93 @@ static void hl_pci_remove(struct pci_dev *pdev)
return;
hl_device_fini(hdev);
pci_disable_pcie_error_reporting(pdev);
pci_set_drvdata(pdev, NULL);
destroy_hdev(hdev);
}
/**
* hl_pci_err_detected - a PCI bus error detected on this device
*
* @pdev: pointer to pci device
* @state: PCI error type
*
* Called by the PCI subsystem whenever a non-correctable
* PCI bus error is detected
*/
static pci_ers_result_t
hl_pci_err_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
struct hl_device *hdev = pci_get_drvdata(pdev);
enum pci_ers_result result;
switch (state) {
case pci_channel_io_normal:
return PCI_ERS_RESULT_CAN_RECOVER;
case pci_channel_io_frozen:
dev_warn(hdev->dev, "frozen state error detected\n");
result = PCI_ERS_RESULT_NEED_RESET;
break;
case pci_channel_io_perm_failure:
dev_warn(hdev->dev, "failure state error detected\n");
result = PCI_ERS_RESULT_DISCONNECT;
break;
default:
result = PCI_ERS_RESULT_NONE;
}
hdev->asic_funcs->halt_engines(hdev, true);
return result;
}
/**
* hl_pci_err_resume - resume after a PCI slot reset
*
* @pdev: pointer to pci device
*
*/
static void hl_pci_err_resume(struct pci_dev *pdev)
{
struct hl_device *hdev = pci_get_drvdata(pdev);
dev_warn(hdev->dev, "Resuming device after PCI slot reset\n");
hl_device_resume(hdev);
}
/**
* hl_pci_err_slot_reset - a PCI slot reset has just happened
*
* @pdev: pointer to pci device
*
* Determine if the driver can recover from the PCI slot reset
*/
static pci_ers_result_t hl_pci_err_slot_reset(struct pci_dev *pdev)
{
return PCI_ERS_RESULT_RECOVERED;
}
static const struct dev_pm_ops hl_pm_ops = {
.suspend = hl_pmops_suspend,
.resume = hl_pmops_resume,
};
static const struct pci_error_handlers hl_pci_err_handler = {
.error_detected = hl_pci_err_detected,
.slot_reset = hl_pci_err_slot_reset,
.resume = hl_pci_err_resume,
};
static struct pci_driver hl_pci_driver = {
.name = HL_NAME,
.id_table = ids,
.probe = hl_pci_probe,
.remove = hl_pci_remove,
.driver.pm = &hl_pm_ops,
.err_handler = &hl_pci_err_handler,
};
/*