crypto: qat - store the PFVF protocol version of the endpoints

This patch adds an entry for storing the PFVF protocol version for both
PF and VFs. While not currently used, knowing and storing the remote
protocol version enables more complex compatibility checks and/or newer
features for compatible PFVF endpoints in the future.
Signed-off-by: Marco Chiappero <marco.chiappero@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/adf_accel_devices.h

@@ -249,6 +249,7 @@ struct adf_accel_vf_info {
 	struct ratelimit_state vf2pf_ratelimit;
 	u32 vf_nr;
 	bool init;
+	u8 vf_compat_ver;
 };
 
 struct adf_accel_dev {
@@ -278,7 +279,7 @@ struct adf_accel_dev {
 			struct mutex vf2pf_lock; /* protect CSR access */
 			struct completion msg_received;
 			struct pfvf_message response; /* temp field holding pf2vf response */
-			u8 pf_version;
+			u8 pf_compat_ver;
 		} vf;
 	};
 	bool is_vf;

drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c

@@ -64,6 +64,8 @@ static int adf_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr,
 		else
 			compat = ADF_PF2VF_VF_COMPAT_UNKNOWN;
 
+		vf_info->vf_compat_ver = vf_compat_ver;
+
 		resp->type = ADF_PF2VF_MSGTYPE_VERSION_RESP;
 		resp->data = FIELD_PREP(ADF_PF2VF_VERSION_RESP_VERS_MASK,
 					ADF_PFVF_COMPAT_THIS_VERSION) |
@@ -78,6 +80,9 @@ static int adf_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr,
 			"Legacy VersionRequest received from VF%d to PF (vers 1.1)\n",
 			vf_nr);
 
+		/* legacy driver, VF compat_ver is 0 */
+		vf_info->vf_compat_ver = 0;
+
 		/* PF always newer than legacy VF */
 		compat = ADF_PF2VF_VF_COMPATIBLE;
 

drivers/crypto/qat/qat_common/adf_pfvf_vf_msg.c

@@ -89,6 +89,6 @@ int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev)
 		return -EINVAL;
 	}
 
-	accel_dev->vf.pf_version = pf_version;
+	accel_dev->vf.pf_compat_ver = pf_version;
 	return 0;
 }

drivers/crypto/qat/qat_common/adf_sriov.c

@@ -58,6 +58,7 @@ static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
 		/* This ptr will be populated when VFs will be created */
 		vf_info->accel_dev = accel_dev;
 		vf_info->vf_nr = i;
+		vf_info->vf_compat_ver = 0;
 
 		mutex_init(&vf_info->pf2vf_lock);
 		ratelimit_state_init(&vf_info->vf2pf_ratelimit,