crypto: qat - fix recovery flow for VFs

JIRA: https://issues.redhat.com/browse/RHEL-52749
Upstream Status: merged into the linux.git

commit 6f1b523
Author: Michal Witwicki <michal.witwicki@intel.com>
Date:   Wed Jul 17 07:44:58 2024 -0400

    crypto: qat - fix recovery flow for VFs

    When the PFVF protocol was updated to support version 5, i.e.
    ADF_PFVF_COMPAT_FALLBACK, the compatibility version for the VF was
    updated without supporting the message RESTARTING_COMPLETE required for
    such version.

    Add support for the ADF_VF2PF_MSGTYPE_RESTARTING_COMPLETE message in the
    VF drivers. This message is sent by the VF driver to the PF to notify
    the completion of the shutdown flow.

    Fixes: ec26f8e ("crypto: qat - update PFVF protocol for recovery")
    Signed-off-by: Michal Witwicki <michal.witwicki@intel.com>
    Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
    Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Vladis Dronov <vdronov@redhat.com>

Author: nefigtut

drivers/crypto/intel/qat/qat_common/adf_pfvf_vf_msg.c

@@ -48,6 +48,20 @@ void adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev)
 }
 EXPORT_SYMBOL_GPL(adf_vf2pf_notify_shutdown);
 
+void adf_vf2pf_notify_restart_complete(struct adf_accel_dev *accel_dev)
+{
+	struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_RESTARTING_COMPLETE };
+
+	/* Check compatibility version */
+	if (accel_dev->vf.pf_compat_ver < ADF_PFVF_COMPAT_FALLBACK)
+		return;
+
+	if (adf_send_vf2pf_msg(accel_dev, msg))
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to send Restarting complete event to PF\n");
+}
+EXPORT_SYMBOL_GPL(adf_vf2pf_notify_restart_complete);
+
 int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev)
 {
 	u8 pf_version;

drivers/crypto/intel/qat/qat_common/adf_pfvf_vf_msg.h

@@ -6,6 +6,7 @@
 #if defined(CONFIG_PCI_IOV)
 int adf_vf2pf_notify_init(struct adf_accel_dev *accel_dev);
 void adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev);
+void adf_vf2pf_notify_restart_complete(struct adf_accel_dev *accel_dev);
 int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev);
 int adf_vf2pf_get_capabilities(struct adf_accel_dev *accel_dev);
 int adf_vf2pf_get_ring_to_svc(struct adf_accel_dev *accel_dev);

drivers/crypto/intel/qat/qat_common/adf_vf_isr.c

@@ -13,6 +13,7 @@
 #include "adf_cfg.h"
 #include "adf_cfg_strings.h"
 #include "adf_cfg_common.h"
+#include "adf_pfvf_vf_msg.h"
 #include "adf_transport_access_macros.h"
 #include "adf_transport_internal.h"
 
@@ -75,6 +76,7 @@ static void adf_dev_stop_async(struct work_struct *work)
 
 	/* Re-enable PF2VF interrupts */
 	adf_enable_pf2vf_interrupts(accel_dev);
+	adf_vf2pf_notify_restart_complete(accel_dev);
 	kfree(stop_data);
 }