drm/i915: preparation for using PAT index

This patch is a preparation for replacing enum i915_cache_level with PAT
index. Caching policy for buffer objects is set through the PAT index in
PTE, the old i915_cache_level is not sufficient to represent all caching
modes supported by the hardware.

Preparing the transition by adding some platform dependent data structures
and helper functions to translate the cache_level to pat_index.

cachelevel_to_pat: a platform dependent array mapping cache_level to
                   pat_index.

max_pat_index: the maximum PAT index recommended in hardware specification
               Needed for validating the PAT index passed in from user
               space.

i915_gem_get_pat_index: function to convert cache_level to PAT index.

obj_to_i915(obj): macro moved to header file for wider usage.

I915_MAX_CACHE_LEVEL: upper bound of i915_cache_level for the
                      convenience of coding.

Cc: Chris Wilson <chris.p.wilson@linux.intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Fei Yang <fei.yang@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230509165200.1740-2-fei.yang@intel.com

1 files changed, 70 insertions, 9 deletions

diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 025d32c0b161..1a3247451d0f 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -29,6 +29,7 @@
 #include "display/intel_display.h"
 #include "gt/intel_gt_regs.h"
 #include "gt/intel_sa_media.h"
+#include "gem/i915_gem_object_types.h"
 
 #include "i915_driver.h"
 #include "i915_drv.h"
@@ -163,6 +164,38 @@
 		.gamma_lut_tests = DRM_COLOR_LUT_NON_DECREASING, \
 	}
 
+#define LEGACY_CACHELEVEL \
+	.cachelevel_to_pat = { \
+		[I915_CACHE_NONE]   = 0, \
+		[I915_CACHE_LLC]    = 1, \
+		[I915_CACHE_L3_LLC] = 2, \
+		[I915_CACHE_WT]     = 3, \
+	}
+
+#define TGL_CACHELEVEL \
+	.cachelevel_to_pat = { \
+		[I915_CACHE_NONE]   = 3, \
+		[I915_CACHE_LLC]    = 0, \
+		[I915_CACHE_L3_LLC] = 0, \
+		[I915_CACHE_WT]     = 2, \
+	}
+
+#define PVC_CACHELEVEL \
+	.cachelevel_to_pat = { \
+		[I915_CACHE_NONE]   = 0, \
+		[I915_CACHE_LLC]    = 3, \
+		[I915_CACHE_L3_LLC] = 3, \
+		[I915_CACHE_WT]     = 2, \
+	}
+
+#define MTL_CACHELEVEL \
+	.cachelevel_to_pat = { \
+		[I915_CACHE_NONE]   = 2, \
+		[I915_CACHE_LLC]    = 3, \
+		[I915_CACHE_L3_LLC] = 3, \
+		[I915_CACHE_WT]     = 1, \
+	}
+
 /* Keep in gen based order, and chronological order within a gen */
 
 #define GEN_DEFAULT_PAGE_SIZES \
@@ -188,11 +221,13 @@
 	.has_snoop = true, \
 	.has_coherent_ggtt = false, \
 	.dma_mask_size = 32, \
+	.max_pat_index = 3, \
 	I9XX_PIPE_OFFSETS, \
 	I9XX_CURSOR_OFFSETS, \
 	I9XX_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 #define I845_FEATURES \
 	GEN(2), \
@@ -209,11 +244,13 @@
 	.has_snoop = true, \
 	.has_coherent_ggtt = false, \
 	.dma_mask_size = 32, \
+	.max_pat_index = 3, \
 	I845_PIPE_OFFSETS, \
 	I845_CURSOR_OFFSETS, \
 	I845_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 static const struct intel_device_info i830_info = {
 	I830_FEATURES,
@@ -248,11 +285,13 @@ static const struct intel_device_info i865g_info = {
 	.has_snoop = true, \
 	.has_coherent_ggtt = true, \
 	.dma_mask_size = 32, \
+	.max_pat_index = 3, \
 	I9XX_PIPE_OFFSETS, \
 	I9XX_CURSOR_OFFSETS, \
 	I9XX_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 static const struct intel_device_info i915g_info = {
 	GEN3_FEATURES,
@@ -340,11 +379,13 @@ static const struct intel_device_info pnv_m_info = {
 	.has_snoop = true, \
 	.has_coherent_ggtt = true, \
 	.dma_mask_size = 36, \
+	.max_pat_index = 3, \
 	I9XX_PIPE_OFFSETS, \
 	I9XX_CURSOR_OFFSETS, \
 	I9XX_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 static const struct intel_device_info i965g_info = {
 	GEN4_FEATURES,
@@ -394,11 +435,13 @@ static const struct intel_device_info gm45_info = {
 	/* ilk does support rc6, but we do not implement [power] contexts */ \
 	.has_rc6 = 0, \
 	.dma_mask_size = 36, \
+	.max_pat_index = 3, \
 	I9XX_PIPE_OFFSETS, \
 	I9XX_CURSOR_OFFSETS, \
 	ILK_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 static const struct intel_device_info ilk_d_info = {
 	GEN5_FEATURES,
@@ -428,13 +471,15 @@ static const struct intel_device_info ilk_m_info = {
 	.has_rc6p = 0, \
 	.has_rps = true, \
 	.dma_mask_size = 40, \
+	.max_pat_index = 3, \
 	.__runtime.ppgtt_type = INTEL_PPGTT_ALIASING, \
 	.__runtime.ppgtt_size = 31, \
 	I9XX_PIPE_OFFSETS, \
 	I9XX_CURSOR_OFFSETS, \
 	ILK_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 #define SNB_D_PLATFORM \
 	GEN6_FEATURES, \
@@ -481,13 +526,15 @@ static const struct intel_device_info snb_m_gt2_info = {
 	.has_reset_engine = true, \
 	.has_rps = true, \
 	.dma_mask_size = 40, \
+	.max_pat_index = 3, \
 	.__runtime.ppgtt_type = INTEL_PPGTT_ALIASING, \
 	.__runtime.ppgtt_size = 31, \
 	IVB_PIPE_OFFSETS, \
 	IVB_CURSOR_OFFSETS, \
 	IVB_COLORS, \
 	GEN_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 #define IVB_D_PLATFORM \
 	GEN7_FEATURES, \
@@ -541,6 +588,7 @@ static const struct intel_device_info vlv_info = {
 	.display.has_gmch = 1,
 	.display.has_hotplug = 1,
 	.dma_mask_size = 40,
+	.max_pat_index = 3,
 	.__runtime.ppgtt_type = INTEL_PPGTT_ALIASING,
 	.__runtime.ppgtt_size = 31,
 	.has_snoop = true,
@@ -552,6 +600,7 @@ static const struct intel_device_info vlv_info = {
 	I9XX_COLORS,
 	GEN_DEFAULT_PAGE_SIZES,
 	GEN_DEFAULT_REGIONS,
+	LEGACY_CACHELEVEL,
 };
 
 #define G75_FEATURES  \
@@ -639,6 +688,7 @@ static const struct intel_device_info chv_info = {
 	.has_logical_ring_contexts = 1,
 	.display.has_gmch = 1,
 	.dma_mask_size = 39,
+	.max_pat_index = 3,
 	.__runtime.ppgtt_type = INTEL_PPGTT_FULL,
 	.__runtime.ppgtt_size = 32,
 	.has_reset_engine = 1,
@@ -650,6 +700,7 @@ static const struct intel_device_info chv_info = {
 	CHV_COLORS,
 	GEN_DEFAULT_PAGE_SIZES,
 	GEN_DEFAULT_REGIONS,
+	LEGACY_CACHELEVEL,
 };
 
 #define GEN9_DEFAULT_PAGE_SIZES \
@@ -731,11 +782,13 @@ static const struct intel_device_info skl_gt4_info = {
 	.has_snoop = true, \
 	.has_coherent_ggtt = false, \
 	.display.has_ipc = 1, \
+	.max_pat_index = 3, \
 	HSW_PIPE_OFFSETS, \
 	IVB_CURSOR_OFFSETS, \
 	IVB_COLORS, \
 	GEN9_DEFAULT_PAGE_SIZES, \
-	GEN_DEFAULT_REGIONS
+	GEN_DEFAULT_REGIONS, \
+	LEGACY_CACHELEVEL
 
 static const struct intel_device_info bxt_info = {
 	GEN9_LP_FEATURES,
@@ -889,9 +942,11 @@ static const struct intel_device_info jsl_info = {
 		[TRANSCODER_DSI_1] = TRANSCODER_DSI1_OFFSET, \
 	}, \
 	TGL_CURSOR_OFFSETS, \
+	TGL_CACHELEVEL, \
 	.has_global_mocs = 1, \
 	.has_pxp = 1, \
-	.display.has_dsb = 1
+	.display.has_dsb = 1, \
+	.max_pat_index = 3
 
 static const struct intel_device_info tgl_info = {
 	GEN12_FEATURES,
@@ -1013,6 +1068,7 @@ static const struct intel_device_info adl_p_info = {
 	.__runtime.graphics.ip.ver = 12, \
 	.__runtime.graphics.ip.rel = 50, \
 	XE_HP_PAGE_SIZES, \
+	TGL_CACHELEVEL, \
 	.dma_mask_size = 46, \
 	.has_3d_pipeline = 1, \
 	.has_64bit_reloc = 1, \
@@ -1031,6 +1087,7 @@ static const struct intel_device_info adl_p_info = {
 	.has_reset_engine = 1, \
 	.has_rps = 1, \
 	.has_runtime_pm = 1, \
+	.max_pat_index = 3, \
 	.__runtime.ppgtt_size = 48, \
 	.__runtime.ppgtt_type = INTEL_PPGTT_FULL
 
@@ -1107,11 +1164,13 @@ static const struct intel_device_info pvc_info = {
 	PLATFORM(INTEL_PONTEVECCHIO),
 	NO_DISPLAY,
 	.has_flat_ccs = 0,
+	.max_pat_index = 7,
 	.__runtime.platform_engine_mask =
 		BIT(BCS0) |
 		BIT(VCS0) |
 		BIT(CCS0) | BIT(CCS1) | BIT(CCS2) | BIT(CCS3),
 	.require_force_probe = 1,
+	PVC_CACHELEVEL,
 };
 
 #define XE_LPDP_FEATURES	\
@@ -1149,9 +1208,11 @@ static const struct intel_device_info mtl_info = {
 	.has_llc = 0,
 	.has_mslice_steering = 0,
 	.has_snoop = 1,
+	.max_pat_index = 4,
 	.__runtime.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,
 	.__runtime.platform_engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(CCS0),
 	.require_force_probe = 1,
+	MTL_CACHELEVEL,
 };
 
 #undef PLATFORM