| /* |
| * Copyright 2017 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 DRV_VC4 |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| #include <vc4_drm.h> |
| #include <xf86drm.h> |
| |
| #include "drv_helpers.h" |
| #include "drv_priv.h" |
| #include "util.h" |
| |
| static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565, |
| DRM_FORMAT_XRGB8888 }; |
| |
| static const uint32_t texture_only_formats[] = { DRM_FORMAT_NV12, DRM_FORMAT_YVU420 }; |
| |
| static int vc4_init(struct driver *drv) |
| { |
| drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats), |
| &LINEAR_METADATA, BO_USE_RENDER_MASK); |
| |
| drv_add_combinations(drv, texture_only_formats, ARRAY_SIZE(texture_only_formats), |
| &LINEAR_METADATA, BO_USE_TEXTURE_MASK); |
| /* |
| * Chrome uses DMA-buf mmap to write to YV12 buffers, which are then accessed by the |
| * Video Encoder Accelerator (VEA). It could also support NV12 potentially in the future. |
| */ |
| drv_modify_combination(drv, DRM_FORMAT_YVU420, &LINEAR_METADATA, BO_USE_HW_VIDEO_ENCODER); |
| drv_modify_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA, |
| BO_USE_HW_VIDEO_DECODER | BO_USE_SCANOUT | BO_USE_HW_VIDEO_ENCODER); |
| |
| return drv_modify_linear_combinations(drv); |
| } |
| |
| static int vc4_bo_create_for_modifier(struct bo *bo, uint32_t width, uint32_t height, |
| uint32_t format, uint64_t modifier) |
| { |
| int ret; |
| size_t plane; |
| uint32_t stride; |
| struct drm_vc4_create_bo bo_create = { 0 }; |
| |
| switch (modifier) { |
| case DRM_FORMAT_MOD_LINEAR: |
| break; |
| case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: |
| drv_log("DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED not supported yet\n"); |
| return -EINVAL; |
| default: |
| return -EINVAL; |
| } |
| |
| /* |
| * Since the ARM L1 cache line size is 64 bytes, align to that as a |
| * performance optimization. |
| */ |
| stride = drv_stride_from_format(format, width, 0); |
| stride = ALIGN(stride, 64); |
| drv_bo_from_format(bo, stride, height, format); |
| |
| bo_create.size = bo->meta.total_size; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create); |
| if (ret) { |
| drv_log("DRM_IOCTL_VC4_CREATE_BO failed (size=%zu)\n", bo->meta.total_size); |
| return -errno; |
| } |
| |
| for (plane = 0; plane < bo->meta.num_planes; plane++) |
| bo->handles[plane].u32 = bo_create.handle; |
| |
| return 0; |
| } |
| |
| static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format, |
| uint64_t use_flags) |
| { |
| struct combination *combo; |
| |
| combo = drv_get_combination(bo->drv, format, use_flags); |
| if (!combo) |
| return -EINVAL; |
| |
| return vc4_bo_create_for_modifier(bo, width, height, format, combo->metadata.modifier); |
| } |
| |
| static int vc4_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height, |
| uint32_t format, const uint64_t *modifiers, uint32_t count) |
| { |
| static const uint64_t modifier_order[] = { |
| DRM_FORMAT_MOD_LINEAR, |
| }; |
| uint64_t modifier; |
| |
| modifier = drv_pick_modifier(modifiers, count, modifier_order, ARRAY_SIZE(modifier_order)); |
| |
| return vc4_bo_create_for_modifier(bo, width, height, format, modifier); |
| } |
| |
| static void *vc4_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags) |
| { |
| int ret; |
| struct drm_vc4_mmap_bo bo_map = { 0 }; |
| |
| bo_map.handle = bo->handles[0].u32; |
| ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map, sizeof(bo_map)); |
| if (ret) { |
| drv_log("DRM_VC4_MMAP_BO failed\n"); |
| return MAP_FAILED; |
| } |
| |
| vma->length = bo->meta.total_size; |
| return mmap(NULL, bo->meta.total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd, |
| bo_map.offset); |
| } |
| |
| const struct backend backend_vc4 = { |
| .name = "vc4", |
| .init = vc4_init, |
| .bo_create = vc4_bo_create, |
| .bo_create_with_modifiers = vc4_bo_create_with_modifiers, |
| .bo_import = drv_prime_bo_import, |
| .bo_destroy = drv_gem_bo_destroy, |
| .bo_map = vc4_bo_map, |
| .bo_unmap = drv_bo_munmap, |
| .resolve_format_and_use_flags = drv_resolve_format_and_use_flags_helper, |
| }; |
| |
| #endif |