pds_core: Require callers of register/unregister to pass PF drvdata

Pass a pointer to the PF's private data structure rather than
bouncing in and out of the PF's PCI function address.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20230807205755.29579-4-brett.creeley@amd.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/net/ethernet/amd/pds_core/auxbus.c

@@ -14,18 +14,13 @@
  * Return: 0 on success, or
  *         negative for error
  */
-int pds_client_register(struct pci_dev *pf_pdev, char *devname)
+int pds_client_register(struct pdsc *pf, char *devname)
 {
 	union pds_core_adminq_comp comp = {};
 	union pds_core_adminq_cmd cmd = {};
-	struct pdsc *pf;
 	int err;
 	u16 ci;
 
-	pf = pci_get_drvdata(pf_pdev);
-	if (pf->state)
-		return -ENXIO;
-
 	cmd.client_reg.opcode = PDS_AQ_CMD_CLIENT_REG;
 	strscpy(cmd.client_reg.devname, devname,
 		sizeof(cmd.client_reg.devname));
@@ -59,17 +54,12 @@ EXPORT_SYMBOL_GPL(pds_client_register);
  * Return: 0 on success, or
  *         negative for error
  */
-int pds_client_unregister(struct pci_dev *pf_pdev, u16 client_id)
+int pds_client_unregister(struct pdsc *pf, u16 client_id)
 {
 	union pds_core_adminq_comp comp = {};
 	union pds_core_adminq_cmd cmd = {};
-	struct pdsc *pf;
 	int err;
 
-	pf = pci_get_drvdata(pf_pdev);
-	if (pf->state)
-		return -ENXIO;
-
 	cmd.client_unreg.opcode = PDS_AQ_CMD_CLIENT_UNREG;
 	cmd.client_unreg.client_id = cpu_to_le16(client_id);
 
@@ -198,7 +188,7 @@ int pdsc_auxbus_dev_del(struct pdsc *cf, struct pdsc *pf)
 
 	padev = pf->vfs[cf->vf_id].padev;
 	if (padev) {
-		pds_client_unregister(pf->pdev, padev->client_id);
+		pds_client_unregister(pf, padev->client_id);
 		auxiliary_device_delete(&padev->aux_dev);
 		auxiliary_device_uninit(&padev->aux_dev);
 		padev->client_id = 0;
@@ -243,7 +233,7 @@ int pdsc_auxbus_dev_add(struct pdsc *cf, struct pdsc *pf)
 	 */
 	snprintf(devname, sizeof(devname), "%s.%s.%d",
 		 PDS_CORE_DRV_NAME, pf->viftype_status[vt].name, cf->uid);
-	client_id = pds_client_register(pf->pdev, devname);
+	client_id = pds_client_register(pf, devname);
 	if (client_id < 0) {
 		err = client_id;
 		goto out_unlock;
@@ -252,7 +242,7 @@ int pdsc_auxbus_dev_add(struct pdsc *cf, struct pdsc *pf)
 	padev = pdsc_auxbus_dev_register(cf, pf, client_id,
 					 pf->viftype_status[vt].name);
 	if (IS_ERR(padev)) {
-		pds_client_unregister(pf->pdev, client_id);
+		pds_client_unregister(pf, client_id);
 		err = PTR_ERR(padev);
 		goto out_unlock;
 	}

include/linux/pds/pds_common.h

@@ -41,9 +41,11 @@ enum pds_core_vif_types {
 
 #define PDS_VDPA_DEV_NAME	PDS_CORE_DRV_NAME "." PDS_DEV_TYPE_VDPA_STR
 
+struct pdsc;
+
 int pdsc_register_notify(struct notifier_block *nb);
 void pdsc_unregister_notify(struct notifier_block *nb);
 void *pdsc_get_pf_struct(struct pci_dev *vf_pdev);
-int pds_client_register(struct pci_dev *pf_pdev, char *devname);
-int pds_client_unregister(struct pci_dev *pf_pdev, u16 client_id);
+int pds_client_register(struct pdsc *pf, char *devname);
+int pds_client_unregister(struct pdsc *pf, u16 client_id);
 #endif /* _PDS_COMMON_H_ */