[Mesa-dev] [PATCH 29/32] i965/blorp: Add genxml-based vertex setup helpers
Pohjolainen, Topi
topi.pohjolainen at intel.com
Thu Aug 18 14:39:39 UTC 2016
On Thu, Aug 11, 2016 at 02:15:26PM -0700, Jason Ekstrand wrote:
> ---
> src/mesa/drivers/dri/i965/genX_blorp_exec.c | 213 +++++++++++++++++++++++++++-
> 1 file changed, 212 insertions(+), 1 deletion(-)
I can't see anything amiss here either:
Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
>
> diff --git a/src/mesa/drivers/dri/i965/genX_blorp_exec.c b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> index 922da45..f345454 100644
> --- a/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> +++ b/src/mesa/drivers/dri/i965/genX_blorp_exec.c
> @@ -85,6 +85,7 @@ __gen_combine_address(struct brw_context *brw, void *location,
> #include "genxml/genX_pack.h"
>
> #define _blorp_cmd_length(cmd) cmd ## _length
> +#define _blorp_cmd_length_bias(cmd) cmd ## _length_bias
> #define _blorp_cmd_header(cmd) cmd ## _header
> #define _blorp_cmd_pack(cmd) cmd ## _pack
>
> @@ -95,6 +96,215 @@ __gen_combine_address(struct brw_context *brw, void *location,
> _blorp_cmd_pack(cmd)(brw, (void *)_dst, &name), \
> _dst = NULL)
>
> +#define blorp_emitn(batch, cmd, n) ({ \
> + uint32_t *_dw = blorp_emit_dwords(batch, n); \
> + struct cmd template = { \
> + _blorp_cmd_header(cmd), \
> + .DWordLength = n - _blorp_cmd_length_bias(cmd), \
> + }; \
> + _blorp_cmd_pack(cmd)(batch, _dw, &template); \
> + _dw + 1; /* Array starts at dw[1] */ \
> + })
> +
> +static void
> +blorp_emit_vertex_data(struct brw_context *brw,
> + const struct brw_blorp_params *params,
> + struct blorp_address *addr,
> + uint32_t *size)
> +{
> + const float vertices[] = {
> + /* v0 */ (float)params->x0, (float)params->y1,
> + /* v1 */ (float)params->x1, (float)params->y1,
> + /* v2 */ (float)params->x0, (float)params->y0,
> + };
> +
> + uint32_t offset;
> + void *data = brw_state_batch(brw, AUB_TRACE_VERTEX_BUFFER,
> + sizeof(vertices), 32, &offset);
> + memcpy(data, vertices, sizeof(vertices));
> +
> + *addr = (struct blorp_address) {
> + .buffer = brw->batch.bo,
> + .read_domains = I915_GEM_DOMAIN_VERTEX,
> + .write_domain = 0,
> + .offset = offset,
> + };
> + *size = sizeof(vertices);
> +}
> +
> +static void
> +blorp_emit_input_varying_data(struct brw_context *brw,
> + const struct brw_blorp_params *params,
> + struct blorp_address *addr,
> + uint32_t *size)
> +{
> + const unsigned vec4_size_in_bytes = 4 * sizeof(float);
> + const unsigned max_num_varyings =
> + DIV_ROUND_UP(sizeof(params->wm_inputs), vec4_size_in_bytes);
> + const unsigned num_varyings = params->wm_prog_data->num_varying_inputs;
> +
> + *size = num_varyings * vec4_size_in_bytes;
> +
> + const float *const inputs_src = (const float *)¶ms->wm_inputs;
> + uint32_t offset;
> + float *inputs = brw_state_batch(brw, AUB_TRACE_VERTEX_BUFFER,
> + *size, 32, &offset);
> +
> + /* Walk over the attribute slots, determine if the attribute is used by
> + * the program and when necessary copy the values from the input storage to
> + * the vertex data buffer.
> + */
> + for (unsigned i = 0; i < max_num_varyings; i++) {
> + const gl_varying_slot attr = VARYING_SLOT_VAR0 + i;
> +
> + if (!(params->wm_prog_data->inputs_read & BITFIELD64_BIT(attr)))
> + continue;
> +
> + memcpy(inputs, inputs_src + i * 4, vec4_size_in_bytes);
> +
> + inputs += 4;
> + }
> +
> + *addr = (struct blorp_address) {
> + .buffer = brw->batch.bo,
> + .read_domains = I915_GEM_DOMAIN_VERTEX,
> + .write_domain = 0,
> + .offset = offset,
> + };
> +}
> +
> +static void
> +blorp_emit_vertex_buffers(struct brw_context *brw,
> + const struct brw_blorp_params *params)
> +{
> + struct GENX(VERTEX_BUFFER_STATE) vb[2];
> + memset(vb, 0, sizeof(vb));
> +
> + unsigned num_buffers = 1;
> +
> + uint32_t size;
> + blorp_emit_vertex_data(brw, params, &vb[0].BufferStartingAddress, &size);
> + vb[0].VertexBufferIndex = 0;
> + vb[0].BufferPitch = 2 * sizeof(float);
> + vb[0].BufferAccessType = VERTEXDATA;
> + vb[0].EndAddress = vb[0].BufferStartingAddress;
> + vb[0].EndAddress.offset += size - 1;
> +
> + if (params->wm_prog_data && params->wm_prog_data->num_varying_inputs) {
> + blorp_emit_input_varying_data(brw, params,
> + &vb[1].BufferStartingAddress, &size);
> + vb[1].VertexBufferIndex = 1;
> + vb[1].BufferPitch = 0;
> + vb[1].BufferAccessType = INSTANCEDATA;
> + vb[1].EndAddress = vb[1].BufferStartingAddress;
> + vb[1].EndAddress.offset += size;
> + num_buffers++;
> + }
> +
> + const unsigned num_dwords =
> + 1 + GENX(VERTEX_BUFFER_STATE_length) * num_buffers;
> + uint32_t *dw = blorp_emitn(brw, GENX(3DSTATE_VERTEX_BUFFERS), num_dwords);
> +
> + for (unsigned i = 0; i < num_buffers; i++) {
> + GENX(VERTEX_BUFFER_STATE_pack)(brw, dw, &vb[i]);
> + dw += GENX(VERTEX_BUFFER_STATE_length);
> + }
> +}
> +
> +static void
> +blorp_emit_vertex_elements(struct brw_context *brw,
> + const struct brw_blorp_params *params)
> +{
> + const unsigned num_varyings =
> + params->wm_prog_data ? params->wm_prog_data->num_varying_inputs : 0;
> + const unsigned num_elements = 2 + num_varyings;
> +
> + struct GENX(VERTEX_ELEMENT_STATE) ve[num_elements];
> + memset(ve, 0, num_elements * sizeof(*ve));
> +
> + /* Setup VBO for the rectangle primitive..
> + *
> + * A rectangle primitive (3DPRIM_RECTLIST) consists of only three
> + * vertices. The vertices reside in screen space with DirectX
> + * coordinates (that is, (0, 0) is the upper left corner).
> + *
> + * v2 ------ implied
> + * | |
> + * | |
> + * v0 ----- v1
> + *
> + * Since the VS is disabled, the clipper loads each VUE directly from
> + * the URB. This is controlled by the 3DSTATE_VERTEX_BUFFERS and
> + * 3DSTATE_VERTEX_ELEMENTS packets below. The VUE contents are as follows:
> + * dw0: Reserved, MBZ.
> + * dw1: Render Target Array Index. The HiZ op does not use indexed
> + * vertices, so set the dword to 0.
> + * dw2: Viewport Index. The HiZ op disables viewport mapping and
> + * scissoring, so set the dword to 0.
> + * dw3: Point Width: The HiZ op does not emit the POINTLIST primitive,
> + * so set the dword to 0.
> + * dw4: Vertex Position X.
> + * dw5: Vertex Position Y.
> + * dw6: Vertex Position Z.
> + * dw7: Vertex Position W.
> + *
> + * dw8: Flat vertex input 0
> + * dw9: Flat vertex input 1
> + * ...
> + * dwn: Flat vertex input n - 8
> + *
> + * For details, see the Sandybridge PRM, Volume 2, Part 1, Section 1.5.1
> + * "Vertex URB Entry (VUE) Formats".
> + *
> + * Only vertex position X and Y are going to be variable, Z is fixed to
> + * zero and W to one. Header words dw0-3 are all zero. There is no need to
> + * include the fixed values in the vertex buffer. Vertex fetcher can be
> + * instructed to fill vertex elements with constant values of one and zero
> + * instead of reading them from the buffer.
> + * Flat inputs are program constants that are not interpolated. Moreover
> + * their values will be the same between vertices.
> + *
> + * See the vertex element setup below.
> + */
> + ve[0].VertexBufferIndex = 0;
> + ve[0].Valid = true;
> + ve[0].SourceElementFormat = ISL_FORMAT_R32G32B32A32_FLOAT;
> + ve[0].SourceElementOffset = 0;
> + ve[0].Component0Control = VFCOMP_STORE_0;
> + ve[0].Component1Control = VFCOMP_STORE_0;
> + ve[0].Component2Control = VFCOMP_STORE_0;
> + ve[0].Component3Control = VFCOMP_STORE_0;
> +
> + ve[1].VertexBufferIndex = 0;
> + ve[1].Valid = true;
> + ve[1].SourceElementFormat = ISL_FORMAT_R32G32_FLOAT;
> + ve[1].SourceElementOffset = 0;
> + ve[1].Component0Control = VFCOMP_STORE_SRC;
> + ve[1].Component1Control = VFCOMP_STORE_SRC;
> + ve[1].Component2Control = VFCOMP_STORE_0;
> + ve[1].Component3Control = VFCOMP_STORE_1_FP;
> +
> + for (unsigned i = 0; i < num_varyings; ++i) {
> + ve[i + 2].VertexBufferIndex = 1;
> + ve[i + 2].Valid = true;
> + ve[i + 2].SourceElementFormat = ISL_FORMAT_R32G32B32A32_FLOAT;
> + ve[i + 2].SourceElementOffset = i * 4 * sizeof(float);
> + ve[i + 2].Component0Control = VFCOMP_STORE_SRC;
> + ve[i + 2].Component1Control = VFCOMP_STORE_SRC;
> + ve[i + 2].Component2Control = VFCOMP_STORE_SRC;
> + ve[i + 2].Component3Control = VFCOMP_STORE_SRC;
> + }
> +
> + const unsigned num_dwords =
> + 1 + GENX(VERTEX_ELEMENT_STATE_length) * num_elements;
> + uint32_t *dw = blorp_emitn(brw, GENX(3DSTATE_VERTEX_ELEMENTS), num_dwords);
> +
> + for (unsigned i = 0; i < num_elements; i++) {
> + GENX(VERTEX_ELEMENT_STATE_pack)(brw, dw, &ve[i]);
> + dw += GENX(VERTEX_ELEMENT_STATE_length);
> + }
> +}
> +
> static void
> blorp_emit_sf_config(struct brw_context *brw,
> const struct brw_blorp_params *params)
> @@ -413,7 +623,8 @@ genX(blorp_exec)(struct brw_context *brw,
>
> brw_upload_state_base_address(brw);
>
> - gen6_blorp_emit_vertices(brw, params);
> + blorp_emit_vertex_buffers(brw, params);
> + blorp_emit_vertex_elements(brw, params);
>
> blorp_emit(brw, GENX(3DSTATE_URB), urb) {
> urb.VSNumberofURBEntries = brw->urb.max_vs_entries;
> --
> 2.5.0.400.gff86faf
>
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