diff mbox series

[10/13] crypto: qat - improve aer error reset handling

Message ID 20240307220551.3529171-11-thibault.ferrante@canonical.com
State New
Headers show
Series crypto: qat - improve recovery flows | expand

Commit Message

Thibault Ferrante March 7, 2024, 10:05 p.m. UTC 
From: Mun Chun Yep <mun.chun.yep@intel.com>

BugLink: https://bugs.launchpad.net/bugs/2056354

Rework the AER reset and recovery flow to take into account root port
integrated devices that gets reset between the error detected and the
slot reset callbacks.

In adf_error_detected() the devices is gracefully shut down. The worker
threads are disabled, the error conditions are notified to listeners and
through PFVF comms and finally the device is reset as part of
adf_dev_down().

In adf_slot_reset(), the device is brought up again. If SRIOV VFs were
enabled before reset, these are re-enabled and VFs are notified of
restarting through PFVF comms.

Signed-off-by: Mun Chun Yep <mun.chun.yep@intel.com>
Reviewed-by: Ahsan Atta <ahsan.atta@intel.com>
Reviewed-by: Markas Rapoportas <markas.rapoportas@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 9567d3dc760931afc38f7f1144c66dd8c4b8c680 linux-next)
Signed-off-by: Thibault Ferrante <thibault.ferrante@canonical.com>
---
 drivers/crypto/intel/qat/qat_common/adf_aer.c | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/crypto/intel/qat/qat_common/adf_aer.c b/drivers/crypto/intel/qat/qat_common/adf_aer.c
index b3d4b6b99c65..3597e7605a14 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_aer.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_aer.c
@@ -33,6 +33,19 @@  static pci_ers_result_t adf_error_detected(struct pci_dev *pdev,
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
 
+	set_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
+	if (accel_dev->hw_device->exit_arb) {
+		dev_dbg(&pdev->dev, "Disabling arbitration\n");
+		accel_dev->hw_device->exit_arb(accel_dev);
+	}
+	adf_error_notifier(accel_dev);
+	adf_pf2vf_notify_fatal_error(accel_dev);
+	adf_dev_restarting_notify(accel_dev);
+	adf_pf2vf_notify_restarting(accel_dev);
+	adf_pf2vf_wait_for_restarting_complete(accel_dev);
+	pci_clear_master(pdev);
+	adf_dev_down(accel_dev, false);
+
 	return PCI_ERS_RESULT_NEED_RESET;
 }
 
@@ -180,14 +193,25 @@  static int adf_dev_aer_schedule_reset(struct adf_accel_dev *accel_dev,
 static pci_ers_result_t adf_slot_reset(struct pci_dev *pdev)
 {
 	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
+	int res = 0;
 
 	if (!accel_dev) {
 		pr_err("QAT: Can't find acceleration device\n");
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
-	if (adf_dev_aer_schedule_reset(accel_dev, ADF_DEV_RESET_SYNC))
+
+	if (!pdev->is_busmaster)
+		pci_set_master(pdev);
+	pci_restore_state(pdev);
+	pci_save_state(pdev);
+	res = adf_dev_up(accel_dev, false);
+	if (res && res != -EALREADY)
 		return PCI_ERS_RESULT_DISCONNECT;
 
+	adf_reenable_sriov(accel_dev);
+	adf_pf2vf_notify_restarted(accel_dev);
+	adf_dev_restarted_notify(accel_dev);
+	clear_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
 	return PCI_ERS_RESULT_RECOVERED;
 }