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authorJason Ekstrand <jason.ekstrand@intel.com>2017-02-17 14:14:48 -0800
committerJason Ekstrand <jason.ekstrand@intel.com>2017-02-23 12:10:42 -0800
commit261092f7d4f3142760fcce98ccb63b4efd47cc48 (patch)
treed23555111a0c689a4e0adcdcbedd501b468db804
parent42b10b175d5e8dfb9c4c46edbc306e7fac6bd3ec (diff)
anv: Enable MSAA compression
This just enables basic MSAA compression (no fast clears) for all multisampled surfaces. This improves the framerate of the Sascha "multisampling" demo by 76% on my Sky Lake laptop. Running Talos on medium settings with 8x MSAA, this improves the framerate in the benchmark by 80%. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Chad Versace <chadversary@chromium.org>
-rw-r--r--src/intel/vulkan/TODO2
-rw-r--r--src/intel/vulkan/anv_blorp.c3
-rw-r--r--src/intel/vulkan/anv_image.c9
-rw-r--r--src/intel/vulkan/anv_pipeline.c19
-rw-r--r--src/intel/vulkan/genX_cmd_buffer.c5
5 files changed, 36 insertions, 2 deletions
diff --git a/src/intel/vulkan/TODO b/src/intel/vulkan/TODO
index 6abda880cf6..5366774b851 100644
--- a/src/intel/vulkan/TODO
+++ b/src/intel/vulkan/TODO
@@ -8,7 +8,7 @@ Missing Features:
Performance:
- Multi-{sampled/gen8,LOD} HiZ
- - Compressed multisample support
+ - MSAA fast clears
- Pushing pieces of UBOs?
- Enable guardband clipping
- Use soft-pin to avoid relocations
diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c
index 8db03e4cef0..2cde3b7689f 100644
--- a/src/intel/vulkan/anv_blorp.c
+++ b/src/intel/vulkan/anv_blorp.c
@@ -1398,7 +1398,8 @@ ccs_resolve_attachment(struct anv_cmd_buffer *cmd_buffer,
struct anv_attachment_state *att_state =
&cmd_buffer->state.attachments[att];
- if (att_state->aux_usage == ISL_AUX_USAGE_NONE)
+ if (att_state->aux_usage == ISL_AUX_USAGE_NONE ||
+ att_state->aux_usage == ISL_AUX_USAGE_MCS)
return; /* Nothing to resolve */
assert(att_state->aux_usage == ISL_AUX_USAGE_CCS_E ||
diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index 47d0a1ec333..cd142938e7f 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -238,6 +238,15 @@ make_surface(const struct anv_device *dev,
}
}
}
+ } else if (aspect == VK_IMAGE_ASPECT_COLOR_BIT && vk_info->samples > 1) {
+ assert(image->aux_surface.isl.size == 0);
+ assert(!(vk_info->usage & VK_IMAGE_USAGE_STORAGE_BIT));
+ ok = isl_surf_get_mcs_surf(&dev->isl_dev, &anv_surf->isl,
+ &image->aux_surface.isl);
+ if (ok) {
+ add_surface(image, &image->aux_surface);
+ image->aux_usage = ISL_AUX_USAGE_MCS;
+ }
}
return VK_SUCCESS;
diff --git a/src/intel/vulkan/anv_pipeline.c b/src/intel/vulkan/anv_pipeline.c
index 44101038357..708b05a9535 100644
--- a/src/intel/vulkan/anv_pipeline.c
+++ b/src/intel/vulkan/anv_pipeline.c
@@ -228,6 +228,25 @@ static void
populate_sampler_prog_key(const struct gen_device_info *devinfo,
struct brw_sampler_prog_key_data *key)
{
+ /* Almost all multisampled textures are compressed. The only time when we
+ * don't compress a multisampled texture is for 16x MSAA with a surface
+ * width greater than 8k which is a bit of an edge case. Since the sampler
+ * just ignores the MCS parameter to ld2ms when MCS is disabled, it's safe
+ * to tell the compiler to always assume compression.
+ */
+ key->compressed_multisample_layout_mask = ~0;
+
+ /* SkyLake added support for 16x MSAA. With this came a new message for
+ * reading from a 16x MSAA surface with compression. The new message was
+ * needed because now the MCS data is 64 bits instead of 32 or lower as is
+ * the case for 8x, 4x, and 2x. The key->msaa_16 bit-field controls which
+ * message we use. Fortunately, the 16x message works for 8x, 4x, and 2x
+ * so we can just use it unconditionally. This may not be quite as
+ * efficient but it saves us from recompiling.
+ */
+ if (devinfo->gen >= 9)
+ key->msaa_16 = ~0;
+
/* XXX: Handle texture swizzle on HSW- */
for (int i = 0; i < MAX_SAMPLERS; i++) {
/* Assume color sampler, no swizzling. (Works for BDW+) */
diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index 7af2b316795..e3f84e32dcc 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -222,6 +222,11 @@ color_attachment_compute_aux_usage(struct anv_device *device,
att_state->input_aux_usage = ISL_AUX_USAGE_NONE;
att_state->fast_clear = false;
return;
+ } else if (iview->image->aux_usage == ISL_AUX_USAGE_MCS) {
+ att_state->aux_usage = ISL_AUX_USAGE_MCS;
+ att_state->input_aux_usage = ISL_AUX_USAGE_MCS;
+ att_state->fast_clear = false;
+ return;
}
assert(iview->image->aux_surface.isl.usage & ISL_SURF_USAGE_CCS_BIT);