[PATCH 04/23] drm/i915: introduce page_size_mask to dev_info

[Matthew Auld <matthew.auld@intel.com>]

In preparation for huge gtt pages expose a page_size_mask as part of the
device info, to indicate the page sizes supported by the HW.  Currently
only 4K is supported.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h                  |  1 +
 drivers/gpu/drm/i915/i915_gem_gtt.h              |  8 +++++++-
 drivers/gpu/drm/i915/i915_pci.c                  | 20 ++++++++++++++++++++
 drivers/gpu/drm/i915/selftests/mock_gem_device.c |  3 +++
 4 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a3100f37bcae..224f8a8ae317 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -844,6 +844,7 @@ struct intel_device_info {
 	enum intel_platform platform;
 	u8 ring_mask; /* Rings supported by the HW */
 	u8 num_rings;
+	unsigned int page_size_mask; /* page sizes supported by the HW */
 #define DEFINE_FLAG(name) u8 name:1
 	DEV_INFO_FOR_EACH_FLAG(DEFINE_FLAG);
 #undef DEFINE_FLAG
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index b4e3aa7c0ce1..4c2f7d7c1e7d 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -42,7 +42,13 @@
 #include "i915_gem_request.h"
 #include "i915_selftest.h"
 
-#define I915_GTT_PAGE_SIZE 4096UL
+#define I915_GTT_PAGE_SIZE_4K BIT(12)
+#define I915_GTT_PAGE_SIZE_64K BIT(16)
+#define I915_GTT_PAGE_SIZE_2M BIT(21)
+#define I915_GTT_PAGE_SIZE_1G BIT(30)
+
+#define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K
+
 #define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE
 
 #define I915_FENCE_REG_NONE -1
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 09d97e0990b7..b07fabf1cd4f 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -56,6 +56,10 @@
 	.color = { .degamma_lut_size = 65, .gamma_lut_size = 257 }
 
 /* Keep in gen based order, and chronological order within a gen */
+
+#define GEN_DEFAULT_PAGE_SIZES \
+	.page_size_mask = I915_GTT_PAGE_SIZE_4K
+
 #define GEN2_FEATURES \
 	.gen = 2, .num_pipes = 1, \
 	.has_overlay = 1, .overlay_needs_physical = 1, \
@@ -64,6 +68,7 @@
 	.unfenced_needs_alignment = 1, \
 	.ring_mask = RENDER_RING, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	CURSOR_OFFSETS
 
 static const struct intel_device_info intel_i830_info = {
@@ -96,6 +101,7 @@ static const struct intel_device_info intel_i865g_info = {
 	.has_gmch_display = 1, \
 	.ring_mask = RENDER_RING, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	CURSOR_OFFSETS
 
 static const struct intel_device_info intel_i915g_info = {
@@ -158,6 +164,7 @@ static const struct intel_device_info intel_pineview_info = {
 	.has_gmch_display = 1, \
 	.ring_mask = RENDER_RING, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	CURSOR_OFFSETS
 
 static const struct intel_device_info intel_i965g_info = {
@@ -198,6 +205,7 @@ static const struct intel_device_info intel_gm45_info = {
 	.has_gmbus_irq = 1, \
 	.ring_mask = RENDER_RING | BSD_RING, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	CURSOR_OFFSETS
 
 static const struct intel_device_info intel_ironlake_d_info = {
@@ -222,6 +230,7 @@ static const struct intel_device_info intel_ironlake_m_info = {
 	.has_gmbus_irq = 1, \
 	.has_aliasing_ppgtt = 1, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	CURSOR_OFFSETS
 
 static const struct intel_device_info intel_sandybridge_d_info = {
@@ -247,6 +256,7 @@ static const struct intel_device_info intel_sandybridge_m_info = {
 	.has_aliasing_ppgtt = 1, \
 	.has_full_ppgtt = 1, \
 	GEN_DEFAULT_PIPEOFFSETS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	IVB_CURSOR_OFFSETS
 
 static const struct intel_device_info intel_ivybridge_d_info = {
@@ -284,6 +294,7 @@ static const struct intel_device_info intel_valleyview_info = {
 	.has_full_ppgtt = 1,
 	.ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 	.display_mmio_offset = VLV_DISPLAY_BASE,
+	GEN_DEFAULT_PAGE_SIZES,
 	GEN_DEFAULT_PIPEOFFSETS,
 	CURSOR_OFFSETS
 };
@@ -308,6 +319,7 @@ static const struct intel_device_info intel_haswell_info = {
 #define BDW_FEATURES \
 	HSW_FEATURES, \
 	BDW_COLORS, \
+	GEN_DEFAULT_PAGE_SIZES, \
 	.has_logical_ring_contexts = 1, \
 	.has_full_48bit_ppgtt = 1, \
 	.has_64bit_reloc = 1, \
@@ -345,13 +357,18 @@ static const struct intel_device_info intel_cherryview_info = {
 	.has_full_ppgtt = 1,
 	.has_reset_engine = 1,
 	.display_mmio_offset = VLV_DISPLAY_BASE,
+	GEN_DEFAULT_PAGE_SIZES,
 	GEN_CHV_PIPEOFFSETS,
 	CURSOR_OFFSETS,
 	CHV_COLORS,
 };
 
+#define GEN9_DEFAULT_PAGE_SIZES \
+	.page_size_mask = I915_GTT_PAGE_SIZE_4K
+
 #define SKL_PLATFORM \
 	BDW_FEATURES, \
+	GEN9_DEFAULT_PAGE_SIZES, \
 	.gen = 9, \
 	.platform = INTEL_SKYLAKE, \
 	.has_csr = 1, \
@@ -390,6 +407,7 @@ static const struct intel_device_info intel_skylake_gt3_info = {
 	.has_full_ppgtt = 1, \
 	.has_full_48bit_ppgtt = 1, \
 	.has_reset_engine = 1, \
+	GEN9_DEFAULT_PAGE_SIZES, \
 	GEN_DEFAULT_PIPEOFFSETS, \
 	IVB_CURSOR_OFFSETS, \
 	BDW_COLORS
@@ -410,6 +428,7 @@ static const struct intel_device_info intel_geminilake_info = {
 
 #define KBL_PLATFORM \
 	BDW_FEATURES, \
+	GEN9_DEFAULT_PAGE_SIZES, \
 	.gen = 9, \
 	.platform = INTEL_KABYLAKE, \
 	.has_csr = 1, \
@@ -445,6 +464,7 @@ static const struct intel_device_info intel_coffeelake_gt3_info = {
 
 static const struct intel_device_info intel_cannonlake_info = {
 	BDW_FEATURES,
+	GEN9_DEFAULT_PAGE_SIZES, \
 	.is_alpha_support = 1,
 	.platform = INTEL_CANNONLAKE,
 	.gen = 10,
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 4d82c978a769..39acab2396b2 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -169,6 +169,9 @@ struct drm_i915_private *mock_gem_device(void)
 
 	mkwrite_device_info(i915)->gen = -1;
 
+	mkwrite_device_info(i915)->page_size_mask =
+		I915_GTT_PAGE_SIZE_4K;
+
 	spin_lock_init(&i915->mm.object_stat_lock);
 	mock_uncore_init(i915);
 
-- 
2.13.5

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