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drm/xe: Define Virtual Function Identifier

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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>
This commit is contained in:
Michal Wajdeczko 2024-01-04 23:20:23 +01:00
parent 0cfb7caefa
commit b97d87039f
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/xe/xe_sriov_types.h
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@ -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)