| /* |
| * Copyright (C) 2008 VMware, Inc. |
| * Copyright (C) 2014 Broadcom |
| * Copyright (C) 2018-2019 Alyssa Rosenzweig |
| * Copyright (C) 2019-2020 Collabora, Ltd. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| */ |
| |
| #include "util/macros.h" |
| #include "util/u_math.h" |
| #include "pan_texture.h" |
| |
| /* Generates a texture descriptor. Ideally, descriptors are immutable after the |
| * texture is created, so we can keep these hanging around in GPU memory in a |
| * dedicated BO and not have to worry. In practice there are some minor gotchas |
| * with this (the driver sometimes will change the format of a texture on the |
| * fly for compression) but it's fast enough to just regenerate the descriptor |
| * in those cases, rather than monkeypatching at drawtime. |
| * |
| * A texture descriptor consists of a 32-byte mali_texture_descriptor structure |
| * followed by a variable number of pointers. Due to this variance and |
| * potentially large size, we actually upload directly rather than returning |
| * the descriptor. Whether the user does a copy themselves or not is irrelevant |
| * to us here. |
| */ |
| |
| /* Check if we need to set a custom stride by computing the "expected" |
| * stride and comparing it to what the user actually wants. Only applies |
| * to linear textures, since tiled/compressed textures have strict |
| * alignment requirements for their strides as it is */ |
| |
| static bool |
| panfrost_needs_explicit_stride( |
| struct panfrost_slice *slices, |
| uint16_t width, |
| unsigned first_level, unsigned last_level, |
| unsigned bytes_per_pixel) |
| { |
| for (unsigned l = first_level; l <= last_level; ++l) { |
| unsigned actual = slices[l].stride; |
| unsigned expected = u_minify(width, l) * bytes_per_pixel; |
| |
| if (actual != expected) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* A Scalable Texture Compression (ASTC) corresponds to just a few texture type |
| * in the hardware, but in fact can be parametrized to have various widths and |
| * heights for the so-called "stretch factor". It turns out these parameters |
| * are stuffed in the bottom bits of the payload pointers. This functions |
| * computes these magic stuffing constants based on the ASTC format in use. The |
| * constant in a given dimension is 3-bits, and two are stored side-by-side for |
| * each active dimension. |
| */ |
| |
| static unsigned |
| panfrost_astc_stretch(unsigned dim) |
| { |
| assert(dim >= 4 && dim <= 12); |
| return MIN2(dim, 11) - 4; |
| } |
| |
| /* Texture addresses are tagged with information about compressed formats. |
| * AFBC uses a bit for whether the colorspace transform is enabled (RGB and |
| * RGBA only). |
| * For ASTC, this is a "stretch factor" encoding the block size. */ |
| |
| static unsigned |
| panfrost_compression_tag( |
| const struct util_format_description *desc, |
| enum mali_format format, enum mali_texture_layout layout) |
| { |
| if (layout == MALI_TEXTURE_AFBC) |
| return desc->nr_channels >= 3; |
| else if (format == MALI_ASTC_2D_LDR || format == MALI_ASTC_2D_HDR) |
| return (panfrost_astc_stretch(desc->block.height) << 3) | |
| panfrost_astc_stretch(desc->block.width); |
| else |
| return 0; |
| } |
| |
| |
| /* Cubemaps have 6 faces as "layers" in between each actual layer. We |
| * need to fix this up. TODO: logic wrong in the asserted out cases ... |
| * can they happen, perhaps from cubemap arrays? */ |
| |
| static void |
| panfrost_adjust_cube_dimensions( |
| unsigned *first_face, unsigned *last_face, |
| unsigned *first_layer, unsigned *last_layer) |
| { |
| *first_face = *first_layer % 6; |
| *last_face = *last_layer % 6; |
| *first_layer /= 6; |
| *last_layer /= 6; |
| |
| assert((*first_layer == *last_layer) || (*first_face == 0 && *last_face == 5)); |
| } |
| |
| /* Following the texture descriptor is a number of pointers. How many? */ |
| |
| static unsigned |
| panfrost_texture_num_elements( |
| unsigned first_level, unsigned last_level, |
| unsigned first_layer, unsigned last_layer, |
| unsigned nr_samples, |
| bool is_cube, bool manual_stride) |
| { |
| unsigned first_face = 0, last_face = 0; |
| |
| if (is_cube) { |
| panfrost_adjust_cube_dimensions(&first_face, &last_face, |
| &first_layer, &last_layer); |
| } |
| |
| unsigned levels = 1 + last_level - first_level; |
| unsigned layers = 1 + last_layer - first_layer; |
| unsigned faces = 1 + last_face - first_face; |
| unsigned num_elements = levels * layers * faces * MAX2(nr_samples, 1); |
| |
| if (manual_stride) |
| num_elements *= 2; |
| |
| return num_elements; |
| } |
| |
| /* Conservative estimate of the size of the texture payload a priori. |
| * Average case, size equal to the actual size. Worst case, off by 2x (if |
| * a manual stride is not needed on a linear texture). Returned value |
| * must be greater than or equal to the actual size, so it's safe to use |
| * as an allocation amount */ |
| |
| unsigned |
| panfrost_estimate_texture_payload_size( |
| unsigned first_level, unsigned last_level, |
| unsigned first_layer, unsigned last_layer, |
| unsigned nr_samples, |
| enum mali_texture_type type, enum mali_texture_layout layout) |
| { |
| /* Assume worst case */ |
| unsigned manual_stride = (layout == MALI_TEXTURE_LINEAR); |
| |
| unsigned elements = panfrost_texture_num_elements( |
| first_level, last_level, |
| first_layer, last_layer, |
| nr_samples, |
| type == MALI_TEX_CUBE, manual_stride); |
| |
| return sizeof(mali_ptr) * elements; |
| } |
| |
| /* Bifrost requires a tile stride for tiled textures. This stride is computed |
| * as (16 * bpp * width) assuming there is at least one tile (width >= 16). |
| * Otherwise if height <= 16, the blob puts zero. Interactions with AFBC are |
| * currently unknown. |
| */ |
| |
| static unsigned |
| panfrost_nonlinear_stride(enum mali_texture_layout layout, |
| unsigned bytes_per_pixel, |
| unsigned width, |
| unsigned height) |
| { |
| if (layout == MALI_TEXTURE_TILED) { |
| return (height <= 16) ? 0 : (16 * bytes_per_pixel * ALIGN_POT(width, 16)); |
| } else { |
| unreachable("TODO: AFBC on Bifrost"); |
| } |
| } |
| |
| static void |
| panfrost_emit_texture_payload( |
| mali_ptr *payload, |
| const struct util_format_description *desc, |
| enum mali_format mali_format, |
| enum mali_texture_type type, |
| enum mali_texture_layout layout, |
| unsigned width, unsigned height, |
| unsigned first_level, unsigned last_level, |
| unsigned first_layer, unsigned last_layer, |
| unsigned nr_samples, |
| unsigned cube_stride, |
| bool manual_stride, |
| mali_ptr base, |
| struct panfrost_slice *slices) |
| { |
| base |= panfrost_compression_tag(desc, mali_format, layout); |
| |
| /* Inject the addresses in, interleaving array indices, mip levels, |
| * cube faces, and strides in that order */ |
| |
| unsigned first_face = 0, last_face = 0, face_mult = 1; |
| |
| if (type == MALI_TEX_CUBE) { |
| face_mult = 6; |
| panfrost_adjust_cube_dimensions(&first_face, &last_face, &first_layer, &last_layer); |
| } |
| |
| nr_samples = MAX2(nr_samples, 1); |
| |
| unsigned idx = 0; |
| |
| for (unsigned w = first_layer; w <= last_layer; ++w) { |
| for (unsigned l = first_level; l <= last_level; ++l) { |
| for (unsigned f = first_face; f <= last_face; ++f) { |
| for (unsigned s = 0; s < nr_samples; ++s) { |
| payload[idx++] = base + panfrost_texture_offset( |
| slices, type == MALI_TEX_3D, |
| cube_stride, l, w * face_mult + f, s); |
| |
| if (manual_stride) { |
| payload[idx++] = (layout == MALI_TEXTURE_LINEAR) ? |
| slices[l].stride : |
| panfrost_nonlinear_stride(layout, |
| MAX2(desc->block.bits / 8, 1), |
| u_minify(width, l), |
| u_minify(height, l)); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| #define MALI_SWIZZLE_R001 \ |
| (MALI_CHANNEL_RED << 0) | \ |
| (MALI_CHANNEL_ZERO << 3) | \ |
| (MALI_CHANNEL_ZERO << 6) | \ |
| (MALI_CHANNEL_ONE << 9) |
| |
| #define MALI_SWIZZLE_A001 \ |
| (MALI_CHANNEL_ALPHA << 0) | \ |
| (MALI_CHANNEL_ZERO << 3) | \ |
| (MALI_CHANNEL_ZERO << 6) | \ |
| (MALI_CHANNEL_ONE << 9) |
| |
| |
| void |
| panfrost_new_texture( |
| void *out, |
| uint16_t width, uint16_t height, |
| uint16_t depth, uint16_t array_size, |
| enum pipe_format format, |
| enum mali_texture_type type, |
| enum mali_texture_layout layout, |
| unsigned first_level, unsigned last_level, |
| unsigned first_layer, unsigned last_layer, |
| unsigned nr_samples, |
| unsigned cube_stride, |
| unsigned swizzle, |
| mali_ptr base, |
| struct panfrost_slice *slices) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| unsigned bytes_per_pixel = util_format_get_blocksize(format); |
| |
| enum mali_format mali_format = panfrost_pipe_format_table[desc->format].hw; |
| assert(mali_format); |
| |
| bool manual_stride = (layout == MALI_TEXTURE_LINEAR) |
| && panfrost_needs_explicit_stride(slices, width, |
| first_level, last_level, bytes_per_pixel); |
| |
| struct mali_texture_descriptor descriptor = { |
| .width = MALI_POSITIVE(u_minify(width, first_level)), |
| .height = MALI_POSITIVE(u_minify(height, first_level)), |
| .depth = MALI_POSITIVE(u_minify(depth, first_level)), |
| .array_size = MALI_POSITIVE(array_size), |
| .format = { |
| .swizzle = (format == PIPE_FORMAT_X24S8_UINT) ? |
| MALI_SWIZZLE_A001 : |
| (format == PIPE_FORMAT_S8_UINT) ? |
| MALI_SWIZZLE_R001 : |
| panfrost_translate_swizzle_4(desc->swizzle), |
| .format = mali_format, |
| .srgb = (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB), |
| .type = type, |
| .layout = layout, |
| .manual_stride = manual_stride, |
| .unknown2 = 1, |
| }, |
| .levels = last_level - first_level, |
| .swizzle = swizzle |
| }; |
| |
| memcpy(out, &descriptor, sizeof(descriptor)); |
| |
| mali_ptr *payload = (mali_ptr *) (out + sizeof(struct mali_texture_descriptor)); |
| panfrost_emit_texture_payload( |
| payload, |
| desc, |
| mali_format, |
| type, |
| layout, |
| width, height, |
| first_level, last_level, |
| first_layer, last_layer, |
| nr_samples, |
| cube_stride, |
| manual_stride, |
| base, |
| slices); |
| } |
| |
| void |
| panfrost_new_texture_bifrost( |
| struct bifrost_texture_descriptor *descriptor, |
| uint16_t width, uint16_t height, |
| uint16_t depth, uint16_t array_size, |
| enum pipe_format format, |
| enum mali_texture_type type, |
| enum mali_texture_layout layout, |
| unsigned first_level, unsigned last_level, |
| unsigned first_layer, unsigned last_layer, |
| unsigned nr_samples, |
| unsigned cube_stride, |
| unsigned swizzle, |
| mali_ptr base, |
| struct panfrost_slice *slices, |
| struct panfrost_bo *payload) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| enum mali_format mali_format = panfrost_pipe_format_table[desc->format].hw; |
| assert(mali_format); |
| |
| panfrost_emit_texture_payload( |
| (mali_ptr *) payload->cpu, |
| desc, |
| mali_format, |
| type, |
| layout, |
| width, height, |
| first_level, last_level, |
| first_layer, last_layer, |
| nr_samples, |
| cube_stride, |
| true, /* Stride explicit on Bifrost */ |
| base, |
| slices); |
| |
| descriptor->format_unk = 0x2; |
| descriptor->type = type; |
| descriptor->format = mali_format; |
| descriptor->srgb = (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB); |
| descriptor->format_unk3 = 0x0; |
| descriptor->width = MALI_POSITIVE(u_minify(width, first_level)); |
| descriptor->height = MALI_POSITIVE(u_minify(height, first_level)); |
| descriptor->swizzle = swizzle; |
| descriptor->layout = layout; |
| descriptor->levels = last_level - first_level; |
| descriptor->unk1 = 0x0; |
| descriptor->levels_unk = 0; |
| descriptor->level_2 = last_level - first_level; |
| descriptor->payload = payload->gpu; |
| descriptor->array_size = MALI_POSITIVE(array_size); |
| descriptor->unk4 = 0x0; |
| descriptor->depth = MALI_POSITIVE(u_minify(depth, first_level)); |
| descriptor->unk5 = 0x0; |
| } |
| |
| /* Computes sizes for checksumming, which is 8 bytes per 16x16 tile. |
| * Checksumming is believed to be a CRC variant (CRC64 based on the size?). |
| * This feature is also known as "transaction elimination". */ |
| |
| #define CHECKSUM_TILE_WIDTH 16 |
| #define CHECKSUM_TILE_HEIGHT 16 |
| #define CHECKSUM_BYTES_PER_TILE 8 |
| |
| unsigned |
| panfrost_compute_checksum_size( |
| struct panfrost_slice *slice, |
| unsigned width, |
| unsigned height) |
| { |
| unsigned aligned_width = ALIGN_POT(width, CHECKSUM_TILE_WIDTH); |
| unsigned aligned_height = ALIGN_POT(height, CHECKSUM_TILE_HEIGHT); |
| |
| unsigned tile_count_x = aligned_width / CHECKSUM_TILE_WIDTH; |
| unsigned tile_count_y = aligned_height / CHECKSUM_TILE_HEIGHT; |
| |
| slice->checksum_stride = tile_count_x * CHECKSUM_BYTES_PER_TILE; |
| |
| return slice->checksum_stride * tile_count_y; |
| } |
| |
| unsigned |
| panfrost_get_layer_stride(struct panfrost_slice *slices, bool is_3d, unsigned cube_stride, unsigned level) |
| { |
| return is_3d ? slices[level].size0 : cube_stride; |
| } |
| |
| /* Computes the offset into a texture at a particular level/face. Add to |
| * the base address of a texture to get the address to that level/face */ |
| |
| unsigned |
| panfrost_texture_offset(struct panfrost_slice *slices, bool is_3d, unsigned cube_stride, unsigned level, unsigned face, unsigned sample) |
| { |
| unsigned layer_stride = panfrost_get_layer_stride(slices, is_3d, cube_stride, level); |
| return slices[level].offset + (face * layer_stride) + (sample * slices[level].size0); |
| } |
