| /* |
| * Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifdef GBM_TEGRA |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <xf86drm.h> |
| #include <tegra_drm.h> |
| |
| #include "gbm_priv.h" |
| #include "helpers.h" |
| #include "util.h" |
| |
| /* |
| * GOB (Group Of Bytes) is the basic unit of the blocklinear layout. |
| * GOBs are arranged to blocks, where the height of the block (measured |
| * in GOBs) is configurable. |
| */ |
| #define NV_BLOCKLINEAR_GOB_HEIGHT 8 |
| #define NV_BLOCKLINEAR_GOB_WIDTH 64 |
| #define NV_DEFAULT_BLOCK_HEIGHT_LOG2 4 |
| #define NV_PREFERRED_PAGE_SIZE (128 * 1024) |
| |
| enum nv_mem_kind |
| { |
| NV_MEM_KIND_PITCH = 0, |
| NV_MEM_KIND_C32_2CRA = 0xdb, |
| NV_MEM_KIND_GENERIC_16Bx2 = 0xfe, |
| }; |
| |
| static int compute_block_height_log2(int height) |
| { |
| int block_height_log2 = NV_DEFAULT_BLOCK_HEIGHT_LOG2; |
| |
| if (block_height_log2 > 0) { |
| /* Shrink, if a smaller block height could cover the whole |
| * surface height. */ |
| int proposed = NV_BLOCKLINEAR_GOB_HEIGHT << (block_height_log2 - 1); |
| while (proposed >= height) { |
| block_height_log2--; |
| if (block_height_log2 == 0) |
| break; |
| proposed /= 2; |
| } |
| } |
| return block_height_log2; |
| } |
| |
| static void compute_layout_blocklinear(int width, int height, int format, |
| enum nv_mem_kind *kind, |
| uint32_t *block_height_log2, |
| uint32_t *stride, uint32_t *size) |
| { |
| int pitch = gbm_stride_from_format(format, width); |
| |
| /* Align to blocklinear blocks. */ |
| pitch = ALIGN(pitch, NV_BLOCKLINEAR_GOB_WIDTH); |
| |
| /* Compute padded height. */ |
| *block_height_log2 = compute_block_height_log2(height); |
| int block_height = 1 << *block_height_log2; |
| int padded_height = |
| ALIGN(height, NV_BLOCKLINEAR_GOB_HEIGHT * block_height); |
| |
| int bytes = pitch * padded_height; |
| |
| /* Pad the allocation to the preferred page size. |
| * This will reduce the required page table size (see discussion in NV |
| * bug 1321091), and also acts as a WAR for NV bug 1325421. |
| */ |
| bytes = ALIGN(bytes, NV_PREFERRED_PAGE_SIZE); |
| |
| *kind = NV_MEM_KIND_C32_2CRA; |
| *stride = pitch; |
| *size = bytes; |
| } |
| |
| static void compute_layout_linear(int width, int height, int format, |
| uint32_t *stride, uint32_t *size) |
| { |
| *stride = gbm_stride_from_format(format, width); |
| *size = *stride * height; |
| } |
| |
| static int gbm_tegra_bo_create(struct gbm_bo *bo, uint32_t width, |
| uint32_t height, uint32_t format, uint32_t flags) |
| { |
| uint32_t size, stride, block_height_log2 = 0; |
| enum nv_mem_kind kind = NV_MEM_KIND_PITCH; |
| struct drm_tegra_gem_create gem_create; |
| int ret; |
| |
| if (flags & GBM_BO_USE_RENDERING) |
| compute_layout_blocklinear(width, height, format, &kind, |
| &block_height_log2, &stride, &size); |
| else |
| compute_layout_linear(width, height, format, &stride, &size); |
| |
| memset(&gem_create, 0, sizeof(gem_create)); |
| gem_create.size = size; |
| gem_create.flags = 0; |
| |
| ret = drmIoctl(bo->gbm->fd, DRM_IOCTL_TEGRA_GEM_CREATE, &gem_create); |
| if (ret) { |
| fprintf(stderr, "minigbm: DRM_IOCTL_TEGRA_GEM_CREATE failed " |
| "(size=%zu)\n", size); |
| return ret; |
| } |
| |
| bo->handles[0].u32 = gem_create.handle; |
| bo->offsets[0] = 0; |
| bo->sizes[0] = size; |
| bo->strides[0] = stride; |
| |
| if (kind != NV_MEM_KIND_PITCH) { |
| struct drm_tegra_gem_set_tiling gem_tile; |
| |
| memset(&gem_tile, 0, sizeof(gem_tile)); |
| gem_tile.handle = bo->handles[0].u32; |
| gem_tile.mode = DRM_TEGRA_GEM_TILING_MODE_BLOCK; |
| gem_tile.value = block_height_log2; |
| |
| ret = drmCommandWriteRead(bo->gbm->fd, DRM_TEGRA_GEM_SET_TILING, |
| &gem_tile, sizeof(gem_tile)); |
| if (ret < 0) { |
| gbm_gem_bo_destroy(bo); |
| return ret; |
| } |
| |
| /* Encode blocklinear parameters for EGLImage creation. */ |
| bo->tiling = (kind & 0xff) | |
| ((block_height_log2 & 0xf) << 8); |
| bo->format_modifiers[0] = gbm_fourcc_mod_code(NV, bo->tiling); |
| } |
| |
| return 0; |
| } |
| |
| const struct gbm_driver gbm_driver_tegra = |
| { |
| .name = "tegra", |
| .bo_create = gbm_tegra_bo_create, |
| .bo_destroy = gbm_gem_bo_destroy, |
| .format_list = { |
| /* Linear support */ |
| {GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_CURSOR | GBM_BO_USE_LINEAR}, |
| {GBM_FORMAT_ARGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_CURSOR | GBM_BO_USE_LINEAR}, |
| /* Blocklinear support */ |
| {GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING}, |
| {GBM_FORMAT_ARGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING}, |
| } |
| }; |
| |
| #endif |