[Mesa-dev] [PATCH 6/7] anv: Add support for fast clears on gen9
Jordan Justen
jordan.l.justen at intel.com
Mon Nov 21 17:52:33 UTC 2016
On 2016-11-19 11:40:08, Jason Ekstrand wrote:
> ---
> src/intel/vulkan/anv_blorp.c | 102 ++++++++++++++++++++++++++++++++-----
> src/intel/vulkan/anv_private.h | 3 ++
> src/intel/vulkan/genX_cmd_buffer.c | 100 ++++++++++++++++++++++++++++++------
> 3 files changed, 176 insertions(+), 29 deletions(-)
>
> diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c
> index 24b98ab..cab1906 100644
> --- a/src/intel/vulkan/anv_blorp.c
> +++ b/src/intel/vulkan/anv_blorp.c
> @@ -1178,16 +1178,35 @@ anv_cmd_buffer_clear_subpass(struct anv_cmd_buffer *cmd_buffer)
> struct blorp_surf surf;
> get_blorp_surf_for_anv_image(image, VK_IMAGE_ASPECT_COLOR_BIT,
> att_state->aux_usage, &surf);
> + surf.clear_color = vk_to_isl_color(att_state->clear_value.color);
>
> const VkRect2D render_area = cmd_buffer->state.render_area;
>
> - blorp_clear(&batch, &surf, iview->isl.format, iview->isl.swizzle,
> - iview->isl.base_level,
> - iview->isl.base_array_layer, fb->layers,
> - render_area.offset.x, render_area.offset.y,
> - render_area.offset.x + render_area.extent.width,
> - render_area.offset.y + render_area.extent.height,
> - vk_to_isl_color(att_state->clear_value.color), NULL);
> + if (att_state->fast_clear) {
> + blorp_fast_clear(&batch, &surf, iview->isl.format,
> + iview->isl.base_level,
> + iview->isl.base_array_layer, fb->layers,
> + render_area.offset.x, render_area.offset.y,
> + render_area.offset.x + render_area.extent.width,
> + render_area.offset.y + render_area.extent.height);
> +
> + /* From the Sky Lake PRM Vol. 7, "Render Target Fast Clear":
> + *
> + * "After Render target fast clear, pipe-control with color cache
> + * write-flush must be issued before sending any DRAW commands on
> + * that render target."
> + */
> + cmd_buffer->state.pending_pipe_bits |=
> + ANV_PIPE_RENDER_TARGET_CACHE_FLUSH_BIT | ANV_PIPE_CS_STALL_BIT;
> + } else {
> + blorp_clear(&batch, &surf, iview->isl.format, iview->isl.swizzle,
> + iview->isl.base_level,
> + iview->isl.base_array_layer, fb->layers,
> + render_area.offset.x, render_area.offset.y,
> + render_area.offset.x + render_area.extent.width,
> + render_area.offset.y + render_area.extent.height,
> + surf.clear_color, NULL);
> + }
>
> att_state->pending_clear_aspects = 0;
> }
> @@ -1298,10 +1317,12 @@ ccs_resolve_attachment(struct anv_cmd_buffer *cmd_buffer,
> struct anv_attachment_state *att_state =
> &cmd_buffer->state.attachments[att];
>
> - assert(att_state->aux_usage != ISL_AUX_USAGE_CCS_D);
> - if (att_state->aux_usage != ISL_AUX_USAGE_CCS_E)
> + if (att_state->aux_usage == ISL_AUX_USAGE_NONE)
> return; /* Nothing to resolve */
>
> + assert(att_state->aux_usage == ISL_AUX_USAGE_CCS_E ||
> + att_state->aux_usage == ISL_AUX_USAGE_CCS_D);
> +
> struct anv_render_pass *pass = cmd_buffer->state.pass;
> struct anv_subpass *subpass = cmd_buffer->state.subpass;
> unsigned subpass_idx = subpass - pass->subpasses;
> @@ -1312,14 +1333,17 @@ ccs_resolve_attachment(struct anv_cmd_buffer *cmd_buffer,
> * of a particular attachment. That way we only resolve once but it's
> * still hot in the cache.
> */
> + bool found_draw = false;
> + enum anv_subpass_usage usage = 0;
> for (uint32_t s = subpass_idx + 1; s < pass->subpass_count; s++) {
> - enum anv_subpass_usage usage = pass->attachments[att].subpass_usage[s];
> + usage |= pass->attachments[att].subpass_usage[s];
>
> if (usage & (ANV_SUBPASS_USAGE_DRAW | ANV_SUBPASS_USAGE_RESOLVE_DST)) {
> /* We found another subpass that draws to this attachment. We'll
> * wait to resolve until then.
> */
> - return;
> + found_draw = true;
> + break;
> }
> }
>
> @@ -1327,12 +1351,60 @@ ccs_resolve_attachment(struct anv_cmd_buffer *cmd_buffer,
> const struct anv_image *image = iview->image;
> assert(image->aspects == VK_IMAGE_ASPECT_COLOR_BIT);
>
> - if (image->aux_usage == ISL_AUX_USAGE_CCS_E)
> + enum blorp_fast_clear_op resolve_op = BLORP_FAST_CLEAR_OP_NONE;
> + if (!found_draw) {
> + /* This is the last subpass that writes to this attachment so we need to
> + * resolve here. Ideally, we would like to only resolve if the storeOp
> + * is set to VK_ATTACHMENT_STORE_OP_STORE. However, we need to ensure
> + * that the CCS bits are set to "resolved" because there may be copy or
> + * blit operations (which may ignore CCS) between now and the next time
> + * we render and we need to ensure that anything they write will be
> + * respected in the next render. Unfortunately, the hardware does not
> + * provide us with any sort of "invalidate" pass that sets the CCS to
> + * "resolved" without writing to the render target.
> + */
> + if (iview->image->aux_usage != ISL_AUX_USAGE_CCS_E) {
> + /* The image destination surface doesn't support compression outside
> + * the render pass. We need a full resolve.
> + */
> + resolve_op = BLORP_FAST_CLEAR_OP_RESOLVE_FULL;
> + } else if (att_state->fast_clear) {
> + /* We don't know what to do with clear colors outside the render
> + * pass. We need a partial resolve.
> + */
> + resolve_op = BLORP_FAST_CLEAR_OP_RESOLVE_PARTIAL;
> + } else {
> + /* The image "natively" supports all the compression we care about
> + * and we don't need to resolve at all. If this is the case, we also
> + * don't need to resolve for any of the input attachment cases below.
> + */
> + }
> + } else if (usage & ANV_SUBPASS_USAGE_INPUT) {
> + /* Input attachments are clear-color aware so, at least on Sky Lake, we
> + * can frequently sample from them with no resolves at all.
> + */
> + if (att_state->aux_usage != att_state->input_aux_usage) {
> + assert(att_state->input_aux_usage == ISL_AUX_USAGE_NONE);
> + resolve_op = BLORP_FAST_CLEAR_OP_RESOLVE_FULL;
> + } else if (!att_state->clear_color_is_zero_one) {
> + /* Sky Lake PRM, Vol. 2d, RENDER_SURFACE_STATE::Red Clear Color:
> + *
> + * "If Number of Multisamples is MULTISAMPLECOUNT_1 AND if this RT
> + * is fast cleared with non-0/1 clear value, this RT must be
> + * partially resolved (refer to Partial Resolve operation) before
> + * binding this surface to Sampler."
> + */
> + resolve_op = BLORP_FAST_CLEAR_OP_RESOLVE_PARTIAL;
> + }
> + }
> +
> + if (resolve_op == BLORP_FAST_CLEAR_OP_NONE)
> return;
>
> struct blorp_surf surf;
> get_blorp_surf_for_anv_image(image, VK_IMAGE_ASPECT_COLOR_BIT,
> att_state->aux_usage, &surf);
> + surf.clear_color = vk_to_isl_color(att_state->clear_value.color);
>
> /* From the Sky Lake PRM Vol. 7, "Render Target Resolve":
> *
> @@ -1353,12 +1425,14 @@ ccs_resolve_attachment(struct anv_cmd_buffer *cmd_buffer,
> blorp_ccs_resolve(batch, &surf,
> iview->isl.base_level,
> iview->isl.base_array_layer + layer,
> - iview->isl.format,
> - BLORP_FAST_CLEAR_OP_RESOLVE_FULL);
> + iview->isl.format, resolve_op);
> }
>
> cmd_buffer->state.pending_pipe_bits |=
> ANV_PIPE_RENDER_TARGET_CACHE_FLUSH_BIT | ANV_PIPE_CS_STALL_BIT;
> +
> + /* Once we've done any sort of resolve, we're no longer fast-cleared */
> + att_state->fast_clear = false;
> }
>
> void
> diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
> index 7b521b1..4e6049c 100644
> --- a/src/intel/vulkan/anv_private.h
> +++ b/src/intel/vulkan/anv_private.h
> @@ -1087,11 +1087,14 @@ void anv_dynamic_state_copy(struct anv_dynamic_state *dest,
> */
> struct anv_attachment_state {
> enum isl_aux_usage aux_usage;
> + enum isl_aux_usage input_aux_usage;
> struct anv_state color_rt_state;
> struct anv_state input_att_state;
>
> VkImageAspectFlags pending_clear_aspects;
> + bool fast_clear;
> VkClearValue clear_value;
> + bool clear_color_is_zero_one;
> };
>
> /** State required while building cmd buffer */
> diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
> index 1ad28fd..38579ce 100644
> --- a/src/intel/vulkan/genX_cmd_buffer.c
> +++ b/src/intel/vulkan/genX_cmd_buffer.c
> @@ -191,23 +191,87 @@ add_image_view_relocs(struct anv_cmd_buffer *cmd_buffer,
> }
> }
>
> -static enum isl_aux_usage
> -fb_attachment_get_aux_usage(struct anv_device *device,
> - struct anv_framebuffer *fb,
> - uint32_t attachment)
> +static bool
> +color_is_zero_one(VkClearColorValue value, enum isl_format format)
> {
> - struct anv_image_view *iview = fb->attachments[attachment];
> + if (isl_format_has_int_channel(format)) {
> + for (unsigned i = 0; i < 4; i++) {
> + if (value.int32[i] != 0 && value.int32[i] != 1)
> + return false;
> + }
> + } else {
> + for (unsigned i = 0; i < 4; i++) {
> + if (value.float32[i] != 0.0f && value.float32[i] != 1.0f)
> + return false;
> + }
> + }
>
> - if (iview->image->aux_surface.isl.size == 0)
> - return ISL_AUX_USAGE_NONE; /* No aux surface */
> + return true;
> +}
> +
> +static void
> +color_attachment_compute_aux_usage(struct anv_device *device,
> + struct anv_attachment_state *att_state,
> + struct anv_image_view *iview,
> + VkRect2D render_area,
> + union isl_color_value *fast_clear_color)
> +{
> + if (iview->image->aux_surface.isl.size == 0) {
> + att_state->aux_usage = ISL_AUX_USAGE_NONE;
> + att_state->input_aux_usage = ISL_AUX_USAGE_NONE;
> + att_state->fast_clear = false;
> + return;
> + }
>
> assert(iview->image->aux_surface.isl.usage & ISL_SURF_USAGE_CCS_BIT);
>
> - if (isl_format_supports_lossless_compression(&device->info,
> - iview->isl.format))
> - return ISL_AUX_USAGE_CCS_E;
> + att_state->clear_color_is_zero_one =
> + color_is_zero_one(att_state->clear_value.color, iview->isl.format);
> +
> + if (att_state->pending_clear_aspects == VK_IMAGE_ASPECT_COLOR_BIT) {
> + /* Start off assuming fast clears are possible */
> + att_state->fast_clear = true;
>
> - return ISL_AUX_USAGE_NONE;
> + /* Potentially, we could do partial fast-clears but doing so has crazy
> + * alignment restrictions. It's easier to just restrict to full size
> + * fast clears for now.
> + */
> + if (render_area.offset.x != 0 ||
> + render_area.offset.y != 0 ||
> + render_area.extent.width != iview->extent.width ||
> + render_area.extent.height != iview->extent.height)
> + att_state->fast_clear = false;
> +
> + if (att_state->fast_clear) {
> + memcpy(fast_clear_color->u32, att_state->clear_value.color.uint32,
> + sizeof(fast_clear_color->u32));
Maybe vk_to_isl_color from patch 2 should be available to all of anv?
-Jordan
> + }
> + } else {
> + att_state->fast_clear = false;
> + }
> +
> + if (isl_format_supports_lossless_compression(&device->info,
> + iview->isl.format)) {
> + att_state->aux_usage = ISL_AUX_USAGE_CCS_E;
> + att_state->input_aux_usage = ISL_AUX_USAGE_CCS_E;
> + } else if (att_state->fast_clear) {
> + att_state->aux_usage = ISL_AUX_USAGE_CCS_D;
> + /* From the Sky Lake PRM, RENDER_SURFACE_STATE::AuxiliarySurfaceMode:
> + *
> + * "If Number of Multisamples is MULTISAMPLECOUNT_1, AUX_CCS_D
> + * setting is only allowed if Surface Format supported for Fast
> + * Clear. In addition, if the surface is bound to the sampling
> + * engine, Surface Format must be supported for Render Target
> + * Compression for surfaces bound to the sampling engine."
> + *
> + * In other words, we can't sample from a fast-cleared image if it
> + * doesn't also support color compression.
> + */
> + att_state->input_aux_usage = ISL_AUX_USAGE_NONE;
> + } else {
> + att_state->aux_usage = ISL_AUX_USAGE_NONE;
> + att_state->input_aux_usage = ISL_AUX_USAGE_NONE;
> + }
> }
>
> static bool
> @@ -350,9 +414,12 @@ genX(cmd_buffer_setup_attachments)(struct anv_cmd_buffer *cmd_buffer,
> struct anv_image_view *iview = framebuffer->attachments[i];
> assert(iview->vk_format == att->format);
>
> + union isl_color_value clear_color = { .u32 = { 0, } };
> if (att_aspects == VK_IMAGE_ASPECT_COLOR_BIT) {
> - state->attachments[i].aux_usage =
> - fb_attachment_get_aux_usage(cmd_buffer->device, framebuffer, i);
> + color_attachment_compute_aux_usage(cmd_buffer->device,
> + &state->attachments[i],
> + iview, begin->renderArea,
> + &clear_color);
>
> struct isl_view view = iview->isl;
> view.usage |= ISL_SURF_USAGE_RENDER_TARGET_BIT;
> @@ -362,6 +429,7 @@ genX(cmd_buffer_setup_attachments)(struct anv_cmd_buffer *cmd_buffer,
> .view = &view,
> .aux_surf = &iview->image->aux_surface.isl,
> .aux_usage = state->attachments[i].aux_usage,
> + .clear_color = clear_color,
> .mocs = cmd_buffer->device->default_mocs);
>
> add_image_view_relocs(cmd_buffer, iview,
> @@ -369,6 +437,7 @@ genX(cmd_buffer_setup_attachments)(struct anv_cmd_buffer *cmd_buffer,
> state->attachments[i].color_rt_state);
> } else {
> state->attachments[i].aux_usage = ISL_AUX_USAGE_NONE;
> + state->attachments[i].input_aux_usage = ISL_AUX_USAGE_NONE;
> }
>
> if (need_input_attachment_state(&pass->attachments[i])) {
> @@ -386,11 +455,12 @@ genX(cmd_buffer_setup_attachments)(struct anv_cmd_buffer *cmd_buffer,
> .surf = surf,
> .view = &view,
> .aux_surf = &iview->image->aux_surface.isl,
> - .aux_usage = state->attachments[i].aux_usage,
> + .aux_usage = state->attachments[i].input_aux_usage,
> + .clear_color = clear_color,
> .mocs = cmd_buffer->device->default_mocs);
>
> add_image_view_relocs(cmd_buffer, iview,
> - state->attachments[i].aux_usage,
> + state->attachments[i].input_aux_usage,
> state->attachments[i].input_att_state);
> }
> }
> --
> 2.5.0.400.gff86faf
>
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