Commit b97d8703 authored Jan 04, 2024 by Michal Wajdeczko

drm/xe: Define Virtual Function Identifier



According to the PCI Express specification, the SR-IOV Virtual
Functions (VFs) are numbered starting with 1 (VF1, VF2, ...).
Additionally, both driver and GuC will refer to Physical Function
(PF) as VF0. Define helper macro to represent VFn and PF.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20240104222031.277-3-michal.wajdeczko@intel.com


Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>

parent 0cfb7cae

drivers/gpu/drm/xe/xe_sriov_types.h

+12 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,18 @@

		#include <linux/build_bug.h>

		/**
		* VFID - Virtual Function Identifier
		* @n: VF number
		*
		* Helper macro to represent Virtual Function (VF) Identifier.
		* VFID(0) is used as alias to the PFID that represents Physical Function.
		*
		* Note: According to PCI spec, SR-IOV VF's numbers are 1-based (VF1, VF2, ...).
		*/
		#define VFID(n) (n)
		#define PFID VFID(0)

		/**
		* enum xe_sriov_mode - SR-IOV mode
		* @XE_SRIOV_MODE_NONE: bare-metal mode (non-virtualized)