diff options
Diffstat (limited to 'src/intel/vulkan/genX_pipeline_util.h')
| -rw-r--r-- | src/intel/vulkan/genX_pipeline_util.h | 146 |
1 files changed, 138 insertions, 8 deletions
diff --git a/src/intel/vulkan/genX_pipeline_util.h b/src/intel/vulkan/genX_pipeline_util.h index 6518fae7988..b23a4212fcf 100644 --- a/src/intel/vulkan/genX_pipeline_util.h +++ b/src/intel/vulkan/genX_pipeline_util.h @@ -190,9 +190,123 @@ emit_vertex_input(struct anv_pipeline *pipeline, static inline void emit_urb_setup(struct anv_pipeline *pipeline) { -#if GEN_GEN == 7 && !GEN_IS_HASWELL struct anv_device *device = pipeline->device; + bool vs_present = pipeline->active_stages & VK_SHADER_STAGE_VERTEX_BIT; + unsigned vs_size = vs_present ? + get_vs_prog_data(pipeline)->base.urb_entry_size : 1; + unsigned vs_entry_size_bytes = vs_size * 64; + bool gs_present = pipeline->active_stages & VK_SHADER_STAGE_GEOMETRY_BIT; + unsigned gs_size = gs_present ? + get_gs_prog_data(pipeline)->base.urb_entry_size : 1; + unsigned gs_entry_size_bytes = gs_size * 64; + + /* From p35 of the Ivy Bridge PRM (section 1.7.1: 3DSTATE_URB_GS): + * + * VS Number of URB Entries must be divisible by 8 if the VS URB Entry + * Allocation Size is less than 9 512-bit URB entries. + * + * Similar text exists for GS. + */ + unsigned vs_granularity = (vs_size < 9) ? 8 : 1; + unsigned gs_granularity = (gs_size < 9) ? 8 : 1; + + /* URB allocations must be done in 8k chunks. */ + unsigned chunk_size_bytes = 8192; + + /* Determine the size of the URB in chunks. */ + unsigned urb_chunks = pipeline->urb.total_size * 1024 / chunk_size_bytes; + + /* Reserve space for push constants */ + unsigned push_constant_kb; + if (pipeline->device->info.gen >= 8) + push_constant_kb = 32; + else if (pipeline->device->info.is_haswell) + push_constant_kb = pipeline->device->info.gt == 3 ? 32 : 16; + else + push_constant_kb = 16; + + unsigned push_constant_bytes = push_constant_kb * 1024; + unsigned push_constant_chunks = + push_constant_bytes / chunk_size_bytes; + + /* Initially, assign each stage the minimum amount of URB space it needs, + * and make a note of how much additional space it "wants" (the amount of + * additional space it could actually make use of). + */ + + /* VS has a lower limit on the number of URB entries */ + unsigned vs_chunks = + ALIGN(device->info.urb.min_vs_entries * vs_entry_size_bytes, + chunk_size_bytes) / chunk_size_bytes; + unsigned vs_wants = + ALIGN(device->info.urb.max_vs_entries * vs_entry_size_bytes, + chunk_size_bytes) / chunk_size_bytes - vs_chunks; + + unsigned gs_chunks = 0; + unsigned gs_wants = 0; + if (gs_present) { + /* There are two constraints on the minimum amount of URB space we can + * allocate: + * + * (1) We need room for at least 2 URB entries, since we always operate + * the GS in DUAL_OBJECT mode. + * + * (2) We can't allocate less than nr_gs_entries_granularity. + */ + gs_chunks = ALIGN(MAX2(gs_granularity, 2) * gs_entry_size_bytes, + chunk_size_bytes) / chunk_size_bytes; + gs_wants = + ALIGN(device->info.urb.max_gs_entries * gs_entry_size_bytes, + chunk_size_bytes) / chunk_size_bytes - gs_chunks; + } + + /* There should always be enough URB space to satisfy the minimum + * requirements of each stage. + */ + unsigned total_needs = push_constant_chunks + vs_chunks + gs_chunks; + assert(total_needs <= urb_chunks); + + /* Mete out remaining space (if any) in proportion to "wants". */ + unsigned total_wants = vs_wants + gs_wants; + unsigned remaining_space = urb_chunks - total_needs; + if (remaining_space > total_wants) + remaining_space = total_wants; + if (remaining_space > 0) { + unsigned vs_additional = (unsigned) + round(vs_wants * (((double) remaining_space) / total_wants)); + vs_chunks += vs_additional; + remaining_space -= vs_additional; + gs_chunks += remaining_space; + } + + /* Sanity check that we haven't over-allocated. */ + assert(push_constant_chunks + vs_chunks + gs_chunks <= urb_chunks); + + /* Finally, compute the number of entries that can fit in the space + * allocated to each stage. + */ + unsigned nr_vs_entries = vs_chunks * chunk_size_bytes / vs_entry_size_bytes; + unsigned nr_gs_entries = gs_chunks * chunk_size_bytes / gs_entry_size_bytes; + + /* Since we rounded up when computing *_wants, this may be slightly more + * than the maximum allowed amount, so correct for that. + */ + nr_vs_entries = MIN2(nr_vs_entries, device->info.urb.max_vs_entries); + nr_gs_entries = MIN2(nr_gs_entries, device->info.urb.max_gs_entries); + + /* Ensure that we program a multiple of the granularity. */ + nr_vs_entries = ROUND_DOWN_TO(nr_vs_entries, vs_granularity); + nr_gs_entries = ROUND_DOWN_TO(nr_gs_entries, gs_granularity); + + /* Finally, sanity check to make sure we have at least the minimum number + * of entries needed for each stage. + */ + assert(nr_vs_entries >= device->info.urb.min_vs_entries); + if (gs_present) + assert(nr_gs_entries >= 2); + +#if GEN_GEN == 7 && !GEN_IS_HASWELL /* From the IVB PRM Vol. 2, Part 1, Section 3.2.1: * * "A PIPE_CONTROL with Post-Sync Operation set to 1h and a depth stall @@ -208,13 +322,29 @@ emit_urb_setup(struct anv_pipeline *pipeline) } #endif - for (int i = MESA_SHADER_VERTEX; i <= MESA_SHADER_GEOMETRY; i++) { - anv_batch_emit(&pipeline->batch, GENX(3DSTATE_URB_VS), urb) { - urb._3DCommandSubOpcode = 48 + i; - urb.VSURBStartingAddress = pipeline->urb.start[i]; - urb.VSURBEntryAllocationSize = pipeline->urb.size[i] - 1; - urb.VSNumberofURBEntries = pipeline->urb.entries[i]; - } + /* Lay out the URB in the following order: + * - push constants + * - VS + * - GS + */ + anv_batch_emit(&pipeline->batch, GENX(3DSTATE_URB_VS), urb) { + urb.VSURBStartingAddress = push_constant_chunks; + urb.VSURBEntryAllocationSize = vs_size - 1; + urb.VSNumberofURBEntries = nr_vs_entries; + } + + anv_batch_emit(&pipeline->batch, GENX(3DSTATE_URB_HS), urb) { + urb.HSURBStartingAddress = push_constant_chunks; + } + + anv_batch_emit(&pipeline->batch, GENX(3DSTATE_URB_DS), urb) { + urb.DSURBStartingAddress = push_constant_chunks; + } + + anv_batch_emit(&pipeline->batch, GENX(3DSTATE_URB_GS), urb) { + urb.GSURBStartingAddress = push_constant_chunks + vs_chunks; + urb.GSURBEntryAllocationSize = gs_size - 1; + urb.GSNumberofURBEntries = nr_gs_entries; } } |