pds_core: add the aux client API

Add the client API operations for running adminq commands.
The core registers the client with the FW, then the client
has a context for requesting adminq services.  We expect
to add additional operations for other clients, including
requesting additional private adminqs and IRQs, but don't have
the need yet.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/pds/pds_auxbus.h

@@ -11,4 +11,10 @@ struct pds_auxiliary_dev {
 	struct pci_dev *vf_pdev;
 	u16 client_id;
 };
+
+int pds_client_adminq_cmd(struct pds_auxiliary_dev *padev,
+			  union pds_core_adminq_cmd *req,
+			  size_t req_len,
+			  union pds_core_adminq_comp *resp,
+			  u64 flags);
 #endif /* _PDSC_AUXBUS_H_ */

include/linux/pds/pds_common.h

@@ -61,4 +61,6 @@ enum pds_core_logical_qtype {
 };
 
 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);
 #endif /* _PDS_COMMON_H_ */