diff options
| author | Michal Wajdeczko <michal.wajdeczko@intel.com> | 2024-01-04 23:20:23 +0100 |
|---|---|---|
| committer | Michal Wajdeczko <michal.wajdeczko@intel.com> | 2024-01-05 16:25:52 +0100 |
| commit | b97d87039fe5a2fc91feb9f42c5b443ad0927864 (patch) | |
| tree | 02250270c0ec0954097c858c8f11d8f543a4ddde /drivers | |
| parent | 0cfb7caefabd740a13ae0c26d092641a5ac7e785 (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_sriov_types.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_sriov_types.h b/drivers/gpu/drm/xe/xe_sriov_types.h index 999a4311b98b..1a138108d139 100644 --- a/drivers/gpu/drm/xe/xe_sriov_types.h +++ b/drivers/gpu/drm/xe/xe_sriov_types.h @@ -9,6 +9,18 @@ #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) * @XE_SRIOV_MODE_PF: SR-IOV Physical Function (PF) mode |