| /* |
| * Copyright 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 DRV_I915 |
| |
| #include <errno.h> |
| #include <i915_drm.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| #include <xf86drm.h> |
| |
| #include "drv_priv.h" |
| #include "helpers.h" |
| #include "util.h" |
| |
| #define I915_CACHELINE_SIZE 64 |
| #define I915_CACHELINE_MASK (I915_CACHELINE_SIZE - 1) |
| |
| static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB1555, |
| DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565, |
| DRM_FORMAT_XBGR2101010, DRM_FORMAT_XBGR8888, |
| DRM_FORMAT_XBGR16161616, DRM_FORMAT_XRGB1555, |
| DRM_FORMAT_XRGB2101010, DRM_FORMAT_XRGB8888 }; |
| |
| static const uint32_t tileable_texture_source_formats[] = { DRM_FORMAT_GR88, DRM_FORMAT_R8, |
| DRM_FORMAT_UYVY, DRM_FORMAT_YUYV }; |
| |
| static const uint32_t texture_source_formats[] = { DRM_FORMAT_YVU420, DRM_FORMAT_YVU420_ANDROID, |
| DRM_FORMAT_NV12 }; |
| |
| struct i915_device { |
| uint32_t gen; |
| int32_t has_llc; |
| }; |
| |
| static uint32_t i915_get_gen(int device_id) |
| { |
| const uint16_t gen3_ids[] = { 0x2582, 0x2592, 0x2772, 0x27A2, 0x27AE, |
| 0x29C2, 0x29B2, 0x29D2, 0xA001, 0xA011 }; |
| unsigned i; |
| for (i = 0; i < ARRAY_SIZE(gen3_ids); i++) |
| if (gen3_ids[i] == device_id) |
| return 3; |
| |
| return 4; |
| } |
| |
| /* |
| * We allow allocation of ARGB formats for SCANOUT if the corresponding XRGB |
| * formats supports it. It's up to the caller (chrome ozone) to ultimately not |
| * scan out ARGB if the display controller only supports XRGB, but we'll allow |
| * the allocation of the bo here. |
| */ |
| static bool format_compatible(const struct combination *combo, uint32_t format) |
| { |
| if (combo->format == format) |
| return true; |
| |
| switch (format) { |
| case DRM_FORMAT_XRGB8888: |
| return combo->format == DRM_FORMAT_ARGB8888; |
| case DRM_FORMAT_XBGR8888: |
| return combo->format == DRM_FORMAT_ABGR8888; |
| case DRM_FORMAT_RGBX8888: |
| return combo->format == DRM_FORMAT_RGBA8888; |
| case DRM_FORMAT_BGRX8888: |
| return combo->format == DRM_FORMAT_BGRA8888; |
| default: |
| return false; |
| } |
| } |
| |
| static int i915_add_kms_item(struct driver *drv, const struct kms_item *item) |
| { |
| uint32_t i; |
| struct combination *combo; |
| |
| /* |
| * Older hardware can't scanout Y-tiled formats. Newer devices can, and |
| * report this functionality via format modifiers. |
| */ |
| for (i = 0; i < drv_array_size(drv->combos); i++) { |
| combo = (struct combination *)drv_array_at_idx(drv->combos, i); |
| if (!format_compatible(combo, item->format)) |
| continue; |
| |
| if (item->modifier == DRM_FORMAT_MOD_LINEAR && |
| combo->metadata.tiling == I915_TILING_X) { |
| /* |
| * FIXME: drv_query_kms() does not report the available modifiers |
| * yet, but we know that all hardware can scanout from X-tiled |
| * buffers, so let's add this to our combinations, except for |
| * cursor, which must not be tiled. |
| */ |
| combo->use_flags |= item->use_flags & ~BO_USE_CURSOR; |
| } |
| |
| if (combo->metadata.modifier == item->modifier) |
| combo->use_flags |= item->use_flags; |
| } |
| |
| return 0; |
| } |
| |
| static int i915_add_combinations(struct driver *drv) |
| { |
| int ret; |
| uint32_t i; |
| struct drv_array *kms_items; |
| struct format_metadata metadata; |
| uint64_t render_use_flags, texture_use_flags; |
| |
| render_use_flags = BO_USE_RENDER_MASK; |
| texture_use_flags = BO_USE_TEXTURE_MASK; |
| |
| metadata.tiling = I915_TILING_NONE; |
| metadata.priority = 1; |
| metadata.modifier = DRM_FORMAT_MOD_LINEAR; |
| |
| drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats), |
| &metadata, render_use_flags); |
| |
| drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats), |
| &metadata, texture_use_flags); |
| |
| drv_add_combinations(drv, tileable_texture_source_formats, |
| ARRAY_SIZE(tileable_texture_source_formats), &metadata, |
| texture_use_flags); |
| |
| drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT); |
| drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT); |
| |
| /* IPU3 camera ISP supports only NV12 output. */ |
| drv_modify_combination(drv, DRM_FORMAT_NV12, &metadata, |
| BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE); |
| /* |
| * R8 format is used for Android's HAL_PIXEL_FORMAT_BLOB and is used for JPEG snapshots |
| * from camera. |
| */ |
| drv_modify_combination(drv, DRM_FORMAT_R8, &metadata, |
| BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE); |
| |
| render_use_flags &= ~BO_USE_RENDERSCRIPT; |
| render_use_flags &= ~BO_USE_SW_WRITE_OFTEN; |
| render_use_flags &= ~BO_USE_SW_READ_OFTEN; |
| render_use_flags &= ~BO_USE_LINEAR; |
| |
| texture_use_flags &= ~BO_USE_RENDERSCRIPT; |
| texture_use_flags &= ~BO_USE_SW_WRITE_OFTEN; |
| texture_use_flags &= ~BO_USE_SW_READ_OFTEN; |
| texture_use_flags &= ~BO_USE_LINEAR; |
| |
| metadata.tiling = I915_TILING_X; |
| metadata.priority = 2; |
| metadata.modifier = I915_FORMAT_MOD_X_TILED; |
| |
| drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats), |
| &metadata, render_use_flags); |
| |
| drv_add_combinations(drv, tileable_texture_source_formats, |
| ARRAY_SIZE(tileable_texture_source_formats), &metadata, |
| texture_use_flags); |
| |
| metadata.tiling = I915_TILING_Y; |
| metadata.priority = 3; |
| metadata.modifier = I915_FORMAT_MOD_Y_TILED; |
| |
| drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats), |
| &metadata, render_use_flags); |
| |
| drv_add_combinations(drv, tileable_texture_source_formats, |
| ARRAY_SIZE(tileable_texture_source_formats), &metadata, |
| texture_use_flags); |
| |
| kms_items = drv_query_kms(drv); |
| if (!kms_items) |
| return 0; |
| |
| for (i = 0; i < drv_array_size(kms_items); i++) { |
| ret = i915_add_kms_item(drv, (struct kms_item *)drv_array_at_idx(kms_items, i)); |
| if (ret) { |
| drv_array_destroy(kms_items); |
| return ret; |
| } |
| } |
| |
| drv_array_destroy(kms_items); |
| return 0; |
| } |
| |
| static int i915_align_dimensions(struct bo *bo, uint32_t tiling, uint32_t *stride, |
| uint32_t *aligned_height) |
| { |
| struct i915_device *i915 = bo->drv->priv; |
| uint32_t horizontal_alignment = 4; |
| uint32_t vertical_alignment = 4; |
| |
| switch (tiling) { |
| default: |
| case I915_TILING_NONE: |
| horizontal_alignment = 64; |
| break; |
| |
| case I915_TILING_X: |
| horizontal_alignment = 512; |
| vertical_alignment = 8; |
| break; |
| |
| case I915_TILING_Y: |
| if (i915->gen == 3) { |
| horizontal_alignment = 512; |
| vertical_alignment = 8; |
| } else { |
| horizontal_alignment = 128; |
| vertical_alignment = 32; |
| } |
| break; |
| } |
| |
| /* |
| * The alignment calculated above is based on the full size luma plane and to have chroma |
| * planes properly aligned with subsampled formats, we need to multiply luma alignment by |
| * subsampling factor. |
| */ |
| switch (bo->format) { |
| case DRM_FORMAT_YVU420_ANDROID: |
| case DRM_FORMAT_YVU420: |
| horizontal_alignment *= 2; |
| /* Fall through */ |
| case DRM_FORMAT_NV12: |
| vertical_alignment *= 2; |
| break; |
| } |
| |
| *aligned_height = ALIGN(bo->height, vertical_alignment); |
| if (i915->gen > 3) { |
| *stride = ALIGN(*stride, horizontal_alignment); |
| } else { |
| while (*stride > horizontal_alignment) |
| horizontal_alignment <<= 1; |
| |
| *stride = horizontal_alignment; |
| } |
| |
| if (i915->gen <= 3 && *stride > 8192) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static void i915_clflush(void *start, size_t size) |
| { |
| void *p = (void *)(((uintptr_t)start) & ~I915_CACHELINE_MASK); |
| void *end = (void *)((uintptr_t)start + size); |
| |
| __builtin_ia32_mfence(); |
| while (p < end) { |
| __builtin_ia32_clflush(p); |
| p = (void *)((uintptr_t)p + I915_CACHELINE_SIZE); |
| } |
| } |
| |
| static int i915_init(struct driver *drv) |
| { |
| int ret; |
| int device_id; |
| struct i915_device *i915; |
| drm_i915_getparam_t get_param; |
| |
| i915 = calloc(1, sizeof(*i915)); |
| if (!i915) |
| return -ENOMEM; |
| |
| memset(&get_param, 0, sizeof(get_param)); |
| get_param.param = I915_PARAM_CHIPSET_ID; |
| get_param.value = &device_id; |
| ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param); |
| if (ret) { |
| drv_log("Failed to get I915_PARAM_CHIPSET_ID\n"); |
| free(i915); |
| return -EINVAL; |
| } |
| |
| i915->gen = i915_get_gen(device_id); |
| |
| memset(&get_param, 0, sizeof(get_param)); |
| get_param.param = I915_PARAM_HAS_LLC; |
| get_param.value = &i915->has_llc; |
| ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param); |
| if (ret) { |
| drv_log("Failed to get I915_PARAM_HAS_LLC\n"); |
| free(i915); |
| return -EINVAL; |
| } |
| |
| drv->priv = i915; |
| |
| return i915_add_combinations(drv); |
| } |
| |
| static int i915_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_i915_gem_create gem_create; |
| struct drm_i915_gem_set_tiling gem_set_tiling; |
| |
| switch (modifier) { |
| case DRM_FORMAT_MOD_LINEAR: |
| bo->tiling = I915_TILING_NONE; |
| break; |
| case I915_FORMAT_MOD_X_TILED: |
| bo->tiling = I915_TILING_X; |
| break; |
| case I915_FORMAT_MOD_Y_TILED: |
| bo->tiling = I915_TILING_Y; |
| break; |
| } |
| |
| bo->format_modifiers[0] = modifier; |
| |
| stride = drv_stride_from_format(format, width, 0); |
| |
| ret = i915_align_dimensions(bo, bo->tiling, &stride, &height); |
| if (ret) |
| return ret; |
| |
| /* |
| * HAL_PIXEL_FORMAT_YV12 requires that the buffer's height not be aligned. |
| */ |
| if (format == DRM_FORMAT_YVU420_ANDROID) |
| height = bo->height; |
| |
| drv_bo_from_format(bo, stride, height, format); |
| |
| memset(&gem_create, 0, sizeof(gem_create)); |
| gem_create.size = bo->total_size; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create); |
| if (ret) { |
| drv_log("DRM_IOCTL_I915_GEM_CREATE failed (size=%llu)\n", gem_create.size); |
| return ret; |
| } |
| |
| for (plane = 0; plane < bo->num_planes; plane++) |
| bo->handles[plane].u32 = gem_create.handle; |
| |
| memset(&gem_set_tiling, 0, sizeof(gem_set_tiling)); |
| gem_set_tiling.handle = bo->handles[0].u32; |
| gem_set_tiling.tiling_mode = bo->tiling; |
| gem_set_tiling.stride = bo->strides[0]; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling); |
| if (ret) { |
| struct drm_gem_close gem_close; |
| memset(&gem_close, 0, sizeof(gem_close)); |
| gem_close.handle = bo->handles[0].u32; |
| drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close); |
| |
| drv_log("DRM_IOCTL_I915_GEM_SET_TILING failed with %d\n", errno); |
| return -errno; |
| } |
| |
| return 0; |
| } |
| |
| static int i915_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 i915_bo_create_for_modifier(bo, width, height, format, combo->metadata.modifier); |
| } |
| |
| static int i915_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[] = { |
| I915_FORMAT_MOD_Y_TILED, |
| I915_FORMAT_MOD_X_TILED, |
| DRM_FORMAT_MOD_LINEAR, |
| }; |
| uint64_t modifier; |
| |
| modifier = drv_pick_modifier(modifiers, count, modifier_order, ARRAY_SIZE(modifier_order)); |
| |
| return i915_bo_create_for_modifier(bo, width, height, format, modifier); |
| } |
| |
| static void i915_close(struct driver *drv) |
| { |
| free(drv->priv); |
| drv->priv = NULL; |
| } |
| |
| static int i915_bo_import(struct bo *bo, struct drv_import_fd_data *data) |
| { |
| int ret; |
| struct drm_i915_gem_get_tiling gem_get_tiling; |
| |
| ret = drv_prime_bo_import(bo, data); |
| if (ret) |
| return ret; |
| |
| /* TODO(gsingh): export modifiers and get rid of backdoor tiling. */ |
| memset(&gem_get_tiling, 0, sizeof(gem_get_tiling)); |
| gem_get_tiling.handle = bo->handles[0].u32; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_GET_TILING, &gem_get_tiling); |
| if (ret) { |
| drv_gem_bo_destroy(bo); |
| drv_log("DRM_IOCTL_I915_GEM_GET_TILING failed.\n"); |
| return ret; |
| } |
| |
| bo->tiling = gem_get_tiling.tiling_mode; |
| return 0; |
| } |
| |
| static void *i915_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags) |
| { |
| int ret; |
| void *addr; |
| |
| if (bo->tiling == I915_TILING_NONE) { |
| struct drm_i915_gem_mmap gem_map; |
| memset(&gem_map, 0, sizeof(gem_map)); |
| |
| if ((bo->use_flags & BO_USE_SCANOUT) && !(bo->use_flags & BO_USE_RENDERSCRIPT)) |
| gem_map.flags = I915_MMAP_WC; |
| |
| gem_map.handle = bo->handles[0].u32; |
| gem_map.offset = 0; |
| gem_map.size = bo->total_size; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_map); |
| if (ret) { |
| drv_log("DRM_IOCTL_I915_GEM_MMAP failed\n"); |
| return MAP_FAILED; |
| } |
| |
| addr = (void *)(uintptr_t)gem_map.addr_ptr; |
| } else { |
| struct drm_i915_gem_mmap_gtt gem_map; |
| memset(&gem_map, 0, sizeof(gem_map)); |
| |
| gem_map.handle = bo->handles[0].u32; |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &gem_map); |
| if (ret) { |
| drv_log("DRM_IOCTL_I915_GEM_MMAP_GTT failed\n"); |
| return MAP_FAILED; |
| } |
| |
| addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd, |
| gem_map.offset); |
| } |
| |
| if (addr == MAP_FAILED) { |
| drv_log("i915 GEM mmap failed\n"); |
| return addr; |
| } |
| |
| vma->length = bo->total_size; |
| return addr; |
| } |
| |
| static int i915_bo_invalidate(struct bo *bo, struct mapping *mapping) |
| { |
| int ret; |
| struct drm_i915_gem_set_domain set_domain; |
| |
| memset(&set_domain, 0, sizeof(set_domain)); |
| set_domain.handle = bo->handles[0].u32; |
| if (bo->tiling == I915_TILING_NONE) { |
| set_domain.read_domains = I915_GEM_DOMAIN_CPU; |
| if (mapping->vma->map_flags & BO_MAP_WRITE) |
| set_domain.write_domain = I915_GEM_DOMAIN_CPU; |
| } else { |
| set_domain.read_domains = I915_GEM_DOMAIN_GTT; |
| if (mapping->vma->map_flags & BO_MAP_WRITE) |
| set_domain.write_domain = I915_GEM_DOMAIN_GTT; |
| } |
| |
| ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain); |
| if (ret) { |
| drv_log("DRM_IOCTL_I915_GEM_SET_DOMAIN with %d\n", ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int i915_bo_flush(struct bo *bo, struct mapping *mapping) |
| { |
| struct i915_device *i915 = bo->drv->priv; |
| if (!i915->has_llc && bo->tiling == I915_TILING_NONE) |
| i915_clflush(mapping->vma->addr, mapping->vma->length); |
| |
| return 0; |
| } |
| |
| static uint32_t i915_resolve_format(uint32_t format, uint64_t use_flags) |
| { |
| switch (format) { |
| case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED: |
| /* KBL camera subsystem requires NV12. */ |
| if (use_flags & (BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE)) |
| return DRM_FORMAT_NV12; |
| /*HACK: See b/28671744 */ |
| return DRM_FORMAT_XBGR8888; |
| case DRM_FORMAT_FLEX_YCbCr_420_888: |
| /* |
| * KBL camera subsystem requires NV12. Our other use cases |
| * don't care: |
| * - Hardware video supports NV12, |
| * - USB Camera HALv3 supports NV12, |
| * - USB Camera HALv1 doesn't use this format. |
| * Moreover, NV12 is preferred for video, due to overlay |
| * support on SKL+. |
| */ |
| return DRM_FORMAT_NV12; |
| default: |
| return format; |
| } |
| } |
| |
| const struct backend backend_i915 = { |
| .name = "i915", |
| .init = i915_init, |
| .close = i915_close, |
| .bo_create = i915_bo_create, |
| .bo_create_with_modifiers = i915_bo_create_with_modifiers, |
| .bo_destroy = drv_gem_bo_destroy, |
| .bo_import = i915_bo_import, |
| .bo_map = i915_bo_map, |
| .bo_unmap = drv_bo_munmap, |
| .bo_invalidate = i915_bo_invalidate, |
| .bo_flush = i915_bo_flush, |
| .resolve_format = i915_resolve_format, |
| }; |
| |
| #endif |