common/sfc_efx/base: convert EFX PCIe INTF to MCDI value

[ upstream commit b85f504 ]

When the driver queries its PCIe interface type via MCDI,
the value from the response is translated to an EFX enum.

When the driver passes this enum value back to any other
MCDI helper, the inverse translation has to be conducted.

Fixes: 1bf9ff5 ("common/sfc_efx/base: allow getting VNIC MCDI client handles")

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>

drivers/common/sfc_efx/base/efx_impl.h

@@ -1555,6 +1555,12 @@ efx_mcdi_intf_from_pcie(
 	__in			uint32_t pcie_intf,
 	__out			efx_pcie_interface_t *efx_intf);
 
+LIBEFX_INTERNAL
+extern	__checkReturn		efx_rc_t
+efx_mcdi_intf_to_pcie(
+	__in			efx_pcie_interface_t efx_intf,
+	__out			uint32_t *pcie_intf);
+
 LIBEFX_INTERNAL
 extern	__checkReturn	efx_rc_t
 efx_mcdi_init_evq(

drivers/common/sfc_efx/base/efx_mcdi.c

@@ -659,13 +659,18 @@ efx_mcdi_get_client_handle(
 	EFX_MCDI_DECLARE_BUF(payload,
 	    MC_CMD_GET_CLIENT_HANDLE_IN_LEN,
 	    MC_CMD_GET_CLIENT_HANDLE_OUT_LEN);
+	uint32_t pcie_intf;
 	efx_rc_t rc;
 
 	if (handle == NULL) {
 		rc = EINVAL;
 		goto fail1;
 	}
 
+	rc = efx_mcdi_intf_to_pcie(intf, &pcie_intf);
+	if (rc != 0)
+		goto fail2;
+
 	req.emr_cmd = MC_CMD_GET_CLIENT_HANDLE;
 	req.emr_in_buf = payload;
 	req.emr_in_length = MC_CMD_GET_CLIENT_HANDLE_IN_LEN;
@@ -676,23 +681,25 @@ efx_mcdi_get_client_handle(
 	    MC_CMD_GET_CLIENT_HANDLE_IN_TYPE_FUNC);
 	MCDI_IN_SET_WORD(req, GET_CLIENT_HANDLE_IN_FUNC_PF, pf);
 	MCDI_IN_SET_WORD(req, GET_CLIENT_HANDLE_IN_FUNC_VF, vf);
-	MCDI_IN_SET_DWORD(req, GET_CLIENT_HANDLE_IN_FUNC_INTF, intf);
+	MCDI_IN_SET_DWORD(req, GET_CLIENT_HANDLE_IN_FUNC_INTF, pcie_intf);
 
 	efx_mcdi_execute(enp, &req);
 
 	if (req.emr_rc != 0) {
 		rc = req.emr_rc;
-		goto fail2;
+		goto fail3;
 	}
 
 	if (req.emr_out_length_used < MC_CMD_GET_CLIENT_HANDLE_OUT_LEN) {
 		rc = EMSGSIZE;
-		goto fail3;
+		goto fail4;
 	}
 
 	*handle = MCDI_OUT_DWORD(req, GET_CLIENT_HANDLE_OUT_HANDLE);
 
 	return 0;
+fail4:
+	EFSYS_PROBE(fail4);
 fail3:
 	EFSYS_PROBE(fail3);
 fail2:
@@ -709,7 +716,7 @@ efx_mcdi_get_own_client_handle(
 {
 	efx_rc_t rc;
 
-	rc = efx_mcdi_get_client_handle(enp, PCIE_INTERFACE_CALLER,
+	rc = efx_mcdi_get_client_handle(enp, EFX_PCIE_INTERFACE_CALLER,
 	    PCIE_FUNCTION_PF_NULL, PCIE_FUNCTION_VF_NULL, handle);
 	if (rc != 0)
 		goto fail1;
@@ -2233,6 +2240,35 @@ efx_mcdi_intf_from_pcie(
 	return (rc);
 }
 
+	__checkReturn		efx_rc_t
+efx_mcdi_intf_to_pcie(
+	__in			efx_pcie_interface_t efx_intf,
+	__out			uint32_t *pcie_intf)
+{
+	efx_rc_t rc;
+
+	switch (efx_intf) {
+	case EFX_PCIE_INTERFACE_CALLER:
+		*pcie_intf = PCIE_INTERFACE_CALLER;
+		break;
+	case EFX_PCIE_INTERFACE_HOST_PRIMARY:
+		*pcie_intf = PCIE_INTERFACE_HOST_PRIMARY;
+		break;
+	case EFX_PCIE_INTERFACE_NIC_EMBEDDED:
+		*pcie_intf = PCIE_INTERFACE_NIC_EMBEDDED;
+		break;
+	default:
+		rc = EINVAL;
+		goto fail1;
+	}
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+	return (rc);
+}
+
 /*
  * This function returns the pf and vf number of a function.  If it is a pf the
  * vf number is 0xffff.  The vf number is the index of the vf on that