/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ /* * Copyright (C) 2016 Red Hat Inc. * Copyright (C) 2017 Intel Corporation * Copyright (C) 2018,2019 DisplayLink (UK) Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. * * Written by: * Jonas Ådahl * Daniel Stone */ /** * SECTION:meta-wayland-dma-buf * @title: MetaWaylandDmaBuf * @short_description: Handles passing DMA-BUFs in Wayland * * The MetaWaylandDmaBuf namespace contains several objects and functions to * handle DMA-BUF buffers that are passed through from clients in Wayland (e.g. * using the linux_dmabuf_unstable_v1 protocol). */ #include "config.h" #include "wayland/meta-wayland-dma-buf.h" #include #include "backends/meta-backend-private.h" #include "backends/meta-egl-ext.h" #include "backends/meta-egl.h" #include "cogl/cogl-egl.h" #include "cogl/cogl.h" #include "meta/meta-backend.h" #include "wayland/meta-wayland-buffer.h" #include "wayland/meta-wayland-private.h" #include "wayland/meta-wayland-versions.h" #ifdef HAVE_NATIVE_BACKEND #include "backends/native/meta-drm-buffer-gbm.h" #include "backends/native/meta-renderer-native.h" #endif #include "linux-dmabuf-unstable-v1-server-protocol.h" #ifndef DRM_FORMAT_MOD_INVALID #define DRM_FORMAT_MOD_INVALID ((1ULL << 56) - 1) #endif #define META_WAYLAND_DMA_BUF_MAX_FDS 4 struct _MetaWaylandDmaBufBuffer { GObject parent; int width; int height; uint32_t drm_format; uint64_t drm_modifier; bool is_y_inverted; int fds[META_WAYLAND_DMA_BUF_MAX_FDS]; uint32_t offsets[META_WAYLAND_DMA_BUF_MAX_FDS]; uint32_t strides[META_WAYLAND_DMA_BUF_MAX_FDS]; }; G_DEFINE_TYPE (MetaWaylandDmaBufBuffer, meta_wayland_dma_buf_buffer, G_TYPE_OBJECT); static gboolean meta_wayland_dma_buf_realize_texture (MetaWaylandBuffer *buffer, GError **error) { MetaBackend *backend = meta_get_backend (); MetaEgl *egl = meta_backend_get_egl (backend); ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend); CoglContext *cogl_context = clutter_backend_get_cogl_context (clutter_backend); EGLDisplay egl_display = cogl_egl_context_get_egl_display (cogl_context); MetaWaylandDmaBufBuffer *dma_buf = buffer->dma_buf.dma_buf; uint32_t n_planes; uint64_t modifiers[META_WAYLAND_DMA_BUF_MAX_FDS]; CoglPixelFormat cogl_format; EGLImageKHR egl_image; CoglEglImageFlags flags; CoglTexture2D *texture; if (buffer->dma_buf.texture) return TRUE; switch (dma_buf->drm_format) { /* * NOTE: The cogl_format here is only used for texture color channel * swizzling as compared to COGL_PIXEL_FORMAT_ARGB. It is *not* used * for accessing the buffer memory. EGL will access the buffer * memory according to the DRM fourcc code. Cogl will not mmap * and access the buffer memory at all. */ case DRM_FORMAT_XRGB8888: cogl_format = COGL_PIXEL_FORMAT_RGB_888; break; case DRM_FORMAT_ARGB8888: cogl_format = COGL_PIXEL_FORMAT_ARGB_8888_PRE; break; case DRM_FORMAT_ARGB2101010: cogl_format = COGL_PIXEL_FORMAT_ARGB_2101010_PRE; break; case DRM_FORMAT_RGB565: cogl_format = COGL_PIXEL_FORMAT_RGB_565; break; default: g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Unsupported buffer format %d", dma_buf->drm_format); return FALSE; } for (n_planes = 0; n_planes < META_WAYLAND_DMA_BUF_MAX_FDS; n_planes++) { if (dma_buf->fds[n_planes] < 0) break; modifiers[n_planes] = dma_buf->drm_modifier; } egl_image = meta_egl_create_dmabuf_image (egl, egl_display, dma_buf->width, dma_buf->height, dma_buf->drm_format, n_planes, dma_buf->fds, dma_buf->strides, dma_buf->offsets, modifiers, error); if (egl_image == EGL_NO_IMAGE_KHR) return FALSE; flags = COGL_EGL_IMAGE_FLAG_NO_GET_DATA; texture = cogl_egl_texture_2d_new_from_image (cogl_context, dma_buf->width, dma_buf->height, cogl_format, egl_image, flags, error); meta_egl_destroy_image (egl, egl_display, egl_image, NULL); if (!texture) return FALSE; buffer->dma_buf.texture = COGL_TEXTURE (texture); buffer->is_y_inverted = dma_buf->is_y_inverted; return TRUE; } gboolean meta_wayland_dma_buf_buffer_attach (MetaWaylandBuffer *buffer, CoglTexture **texture, GError **error) { if (!meta_wayland_dma_buf_realize_texture (buffer, error)) return FALSE; cogl_clear_object (texture); *texture = cogl_object_ref (buffer->dma_buf.texture); return TRUE; } #ifdef HAVE_NATIVE_BACKEND static struct gbm_bo * create_gbm_bo (MetaWaylandDmaBufBuffer *dma_buf, MetaGpuKms *gpu_kms, int n_planes, gboolean *use_modifier) { struct gbm_device *gbm_device; gbm_device = meta_gbm_device_from_gpu (gpu_kms); if (dma_buf->drm_modifier != DRM_FORMAT_MOD_INVALID || n_planes > 1 || dma_buf->offsets[0] > 0) { struct gbm_import_fd_modifier_data import_with_modifier; import_with_modifier = (struct gbm_import_fd_modifier_data) { .width = dma_buf->width, .height = dma_buf->height, .format = dma_buf->drm_format, .num_fds = n_planes, .modifier = dma_buf->drm_modifier, }; memcpy (import_with_modifier.fds, dma_buf->fds, sizeof (dma_buf->fds)); memcpy (import_with_modifier.strides, dma_buf->strides, sizeof (import_with_modifier.strides)); memcpy (import_with_modifier.offsets, dma_buf->offsets, sizeof (import_with_modifier.offsets)); *use_modifier = TRUE; return gbm_bo_import (gbm_device, GBM_BO_IMPORT_FD_MODIFIER, &import_with_modifier, GBM_BO_USE_SCANOUT); } else { struct gbm_import_fd_data import_legacy; import_legacy = (struct gbm_import_fd_data) { .width = dma_buf->width, .height = dma_buf->height, .format = dma_buf->drm_format, .stride = dma_buf->strides[0], .fd = dma_buf->fds[0], }; *use_modifier = FALSE; return gbm_bo_import (gbm_device, GBM_BO_IMPORT_FD, &import_legacy, GBM_BO_USE_SCANOUT); } } #endif CoglScanout * meta_wayland_dma_buf_try_acquire_scanout (MetaWaylandDmaBufBuffer *dma_buf, CoglOnscreen *onscreen) { #ifdef HAVE_NATIVE_BACKEND MetaBackend *backend = meta_get_backend (); MetaRenderer *renderer = meta_backend_get_renderer (backend); MetaRendererNative *renderer_native = META_RENDERER_NATIVE (renderer); MetaGpuKms *gpu_kms; int n_planes; uint32_t drm_format; uint64_t drm_modifier; uint32_t stride; struct gbm_bo *gbm_bo; gboolean use_modifier; g_autoptr (GError) error = NULL; MetaDrmBufferGbm *fb; for (n_planes = 0; n_planes < META_WAYLAND_DMA_BUF_MAX_FDS; n_planes++) { if (dma_buf->fds[n_planes] < 0) break; } drm_format = dma_buf->drm_format; drm_modifier = dma_buf->drm_modifier; stride = dma_buf->strides[0]; if (!meta_onscreen_native_is_buffer_scanout_compatible (onscreen, drm_format, drm_modifier, stride)) return NULL; gpu_kms = meta_renderer_native_get_primary_gpu (renderer_native); gbm_bo = create_gbm_bo (dma_buf, gpu_kms, n_planes, &use_modifier); fb = meta_drm_buffer_gbm_new_take (gpu_kms, gbm_bo, use_modifier, &error); if (!fb) { g_debug ("Failed to create scanout buffer: %s", error->message); gbm_bo_destroy (gbm_bo); return NULL; } return COGL_SCANOUT (fb); #else return NULL; #endif } static void buffer_params_add (struct wl_client *client, struct wl_resource *resource, int32_t fd, uint32_t plane_idx, uint32_t offset, uint32_t stride, uint32_t drm_modifier_hi, uint32_t drm_modifier_lo) { MetaWaylandDmaBufBuffer *dma_buf; uint64_t drm_modifier; drm_modifier = ((uint64_t) drm_modifier_hi) << 32; drm_modifier |= ((uint64_t) drm_modifier_lo) & 0xffffffff; dma_buf = wl_resource_get_user_data (resource); if (!dma_buf) { wl_resource_post_error (resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ALREADY_USED, "params already used"); return; } if (plane_idx >= META_WAYLAND_DMA_BUF_MAX_FDS) { wl_resource_post_error (resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_PLANE_IDX, "out-of-bounds plane index %d", plane_idx); return; } if (dma_buf->fds[plane_idx] != -1) { wl_resource_post_error (resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_PLANE_SET, "plane index %d already set", plane_idx); return; } if (dma_buf->drm_modifier != DRM_FORMAT_MOD_INVALID && dma_buf->drm_modifier != drm_modifier) { wl_resource_post_error (resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_WL_BUFFER, "mismatching modifier between planes"); return; } dma_buf->drm_modifier = drm_modifier; dma_buf->fds[plane_idx] = fd; dma_buf->offsets[plane_idx] = offset; dma_buf->strides[plane_idx] = stride; } static void buffer_params_destroy (struct wl_client *client, struct wl_resource *resource) { wl_resource_destroy (resource); } static void buffer_params_destructor (struct wl_resource *resource) { MetaWaylandDmaBufBuffer *dma_buf; /* The user-data for our MetaWaylandBuffer is only valid in between adding * FDs and creating the buffer; once it is created, we free it out into * the wild, where the ref is considered transferred to the wl_buffer. */ dma_buf = wl_resource_get_user_data (resource); if (dma_buf) g_object_unref (dma_buf); } static void buffer_destroy (struct wl_client *client, struct wl_resource *resource) { wl_resource_destroy (resource); } static const struct wl_buffer_interface dma_buf_buffer_impl = { buffer_destroy, }; /** * meta_wayland_dma_buf_from_buffer: * @buffer: A #MetaWaylandBuffer object * * Fetches the associated #MetaWaylandDmaBufBuffer from the wayland buffer. * This does not *create* a new object, as this happens in the create_params * request of linux_dmabuf_unstable_v1. * * Returns: (transfer none): The corresponding #MetaWaylandDmaBufBuffer (or * %NULL if it wasn't a dma_buf-based wayland buffer) */ MetaWaylandDmaBufBuffer * meta_wayland_dma_buf_from_buffer (MetaWaylandBuffer *buffer) { if (!buffer->resource) return NULL; if (wl_resource_instance_of (buffer->resource, &wl_buffer_interface, &dma_buf_buffer_impl)) return wl_resource_get_user_data (buffer->resource); return NULL; } static void buffer_params_create_common (struct wl_client *client, struct wl_resource *params_resource, uint32_t buffer_id, int32_t width, int32_t height, uint32_t drm_format, uint32_t flags) { MetaWaylandDmaBufBuffer *dma_buf; MetaWaylandBuffer *buffer; struct wl_resource *buffer_resource; GError *error = NULL; dma_buf = wl_resource_get_user_data (params_resource); if (!dma_buf) { wl_resource_post_error (params_resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_ALREADY_USED, "params already used"); return; } /* Calling the 'create' method is the point of no return: after that point, * the params object cannot be used. This method must either transfer the * ownership of the MetaWaylandDmaBufBuffer to a MetaWaylandBuffer, or * destroy it. */ wl_resource_set_user_data (params_resource, NULL); if (dma_buf->fds[0] == -1) { wl_resource_post_error (params_resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE, "no planes added to params"); g_object_unref (dma_buf); return; } if ((dma_buf->fds[3] >= 0 || dma_buf->fds[2] >= 0) && (dma_buf->fds[2] == -1 || dma_buf->fds[1] == -1)) { wl_resource_post_error (params_resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INCOMPLETE, "gap in planes added to params"); g_object_unref (dma_buf); return; } dma_buf->width = width; dma_buf->height = height; dma_buf->drm_format = drm_format; dma_buf->is_y_inverted = !(flags & ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT); if (flags & ~ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT) { wl_resource_post_error (params_resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_WL_BUFFER, "unknown flags 0x%x supplied", flags); g_object_unref (dma_buf); return; } /* Create a new MetaWaylandBuffer wrapping our dmabuf, and immediately try * to realize it, so we can give the client success/fail feedback for the * import. */ buffer_resource = wl_resource_create (client, &wl_buffer_interface, 1, buffer_id); wl_resource_set_implementation (buffer_resource, &dma_buf_buffer_impl, dma_buf, NULL); buffer = meta_wayland_buffer_from_resource (buffer_resource); meta_wayland_buffer_realize (buffer); if (!meta_wayland_dma_buf_realize_texture (buffer, &error)) { if (buffer_id == 0) { zwp_linux_buffer_params_v1_send_failed (params_resource); } else { wl_resource_post_error (params_resource, ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_INVALID_WL_BUFFER, "failed to import supplied dmabufs: %s", error ? error->message : "unknown error"); } /* will unref the MetaWaylandBuffer */ wl_resource_destroy (buffer->resource); return; } /* If buffer_id is 0, we are using the non-immediate interface, so * need to send a success event with our buffer. */ if (buffer_id == 0) zwp_linux_buffer_params_v1_send_created (params_resource, buffer->resource); } static void buffer_params_create (struct wl_client *client, struct wl_resource *params_resource, int32_t width, int32_t height, uint32_t format, uint32_t flags) { buffer_params_create_common (client, params_resource, 0, width, height, format, flags); } static void buffer_params_create_immed (struct wl_client *client, struct wl_resource *params_resource, uint32_t buffer_id, int32_t width, int32_t height, uint32_t format, uint32_t flags) { buffer_params_create_common (client, params_resource, buffer_id, width, height, format, flags); } static const struct zwp_linux_buffer_params_v1_interface buffer_params_implementation = { buffer_params_destroy, buffer_params_add, buffer_params_create, buffer_params_create_immed, }; static void dma_buf_handle_destroy (struct wl_client *client, struct wl_resource *resource) { wl_resource_destroy (resource); } static void dma_buf_handle_create_buffer_params (struct wl_client *client, struct wl_resource *dma_buf_resource, uint32_t params_id) { struct wl_resource *params_resource; MetaWaylandDmaBufBuffer *dma_buf; dma_buf = g_object_new (META_TYPE_WAYLAND_DMA_BUF_BUFFER, NULL); params_resource = wl_resource_create (client, &zwp_linux_buffer_params_v1_interface, wl_resource_get_version (dma_buf_resource), params_id); wl_resource_set_implementation (params_resource, &buffer_params_implementation, dma_buf, buffer_params_destructor); } static const struct zwp_linux_dmabuf_v1_interface dma_buf_implementation = { dma_buf_handle_destroy, dma_buf_handle_create_buffer_params, }; static gboolean should_send_modifiers (MetaBackend *backend) { MetaSettings *settings = meta_backend_get_settings (backend); return meta_settings_is_experimental_feature_enabled ( settings, META_EXPERIMENTAL_FEATURE_KMS_MODIFIERS); } static void send_modifiers (struct wl_resource *resource, uint32_t format) { MetaBackend *backend = meta_get_backend (); MetaEgl *egl = meta_backend_get_egl (backend); ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend); CoglContext *cogl_context = clutter_backend_get_cogl_context (clutter_backend); EGLDisplay egl_display = cogl_egl_context_get_egl_display (cogl_context); EGLint num_modifiers; EGLuint64KHR *modifiers; GError *error = NULL; gboolean ret; int i; zwp_linux_dmabuf_v1_send_format (resource, format); /* The modifier event was only added in v3; v1 and v2 only have the format * event. */ if (wl_resource_get_version (resource) < ZWP_LINUX_DMABUF_V1_MODIFIER_SINCE_VERSION) return; if (!should_send_modifiers (backend)) { zwp_linux_dmabuf_v1_send_modifier (resource, format, DRM_FORMAT_MOD_INVALID >> 32, DRM_FORMAT_MOD_INVALID & 0xffffffff); return; } /* First query the number of available modifiers, then allocate an array, * then fill the array. */ ret = meta_egl_query_dma_buf_modifiers (egl, egl_display, format, 0, NULL, NULL, &num_modifiers, NULL); if (!ret) return; if (num_modifiers == 0) { zwp_linux_dmabuf_v1_send_modifier (resource, format, DRM_FORMAT_MOD_INVALID >> 32, DRM_FORMAT_MOD_INVALID & 0xffffffff); return; } modifiers = g_new0 (uint64_t, num_modifiers); ret = meta_egl_query_dma_buf_modifiers (egl, egl_display, format, num_modifiers, modifiers, NULL, &num_modifiers, &error); if (!ret) { g_warning ("Failed to query modifiers for format 0x%" PRIu32 ": %s", format, error ? error->message : "unknown error"); g_free (modifiers); return; } for (i = 0; i < num_modifiers; i++) { zwp_linux_dmabuf_v1_send_modifier (resource, format, modifiers[i] >> 32, modifiers[i] & 0xffffffff); } g_free (modifiers); } static void dma_buf_bind (struct wl_client *client, void *data, uint32_t version, uint32_t id) { MetaWaylandCompositor *compositor = data; struct wl_resource *resource; resource = wl_resource_create (client, &zwp_linux_dmabuf_v1_interface, version, id); wl_resource_set_implementation (resource, &dma_buf_implementation, compositor, NULL); send_modifiers (resource, DRM_FORMAT_ARGB8888); send_modifiers (resource, DRM_FORMAT_XRGB8888); send_modifiers (resource, DRM_FORMAT_ARGB2101010); send_modifiers (resource, DRM_FORMAT_RGB565); } /** * meta_wayland_dma_buf_init: * @compositor: The #MetaWaylandCompositor * * Creates the global Wayland object that exposes the linux-dmabuf protocol. * * Returns: Whether the initialization was succesfull. If this is %FALSE, * clients won't be able to use the linux-dmabuf protocol to pass buffers. */ gboolean meta_wayland_dma_buf_init (MetaWaylandCompositor *compositor) { MetaBackend *backend = meta_get_backend (); MetaEgl *egl = meta_backend_get_egl (backend); ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend); CoglContext *cogl_context = clutter_backend_get_cogl_context (clutter_backend); EGLDisplay egl_display = cogl_egl_context_get_egl_display (cogl_context); g_assert (backend && egl && clutter_backend && cogl_context && egl_display); if (!meta_egl_has_extensions (egl, egl_display, NULL, "EGL_EXT_image_dma_buf_import_modifiers", NULL)) return FALSE; if (!wl_global_create (compositor->wayland_display, &zwp_linux_dmabuf_v1_interface, META_ZWP_LINUX_DMABUF_V1_VERSION, compositor, dma_buf_bind)) return FALSE; return TRUE; } static void meta_wayland_dma_buf_buffer_finalize (GObject *object) { MetaWaylandDmaBufBuffer *dma_buf = META_WAYLAND_DMA_BUF_BUFFER (object); int i; for (i = 0; i < META_WAYLAND_DMA_BUF_MAX_FDS; i++) { if (dma_buf->fds[i] != -1) close (dma_buf->fds[i]); } G_OBJECT_CLASS (meta_wayland_dma_buf_buffer_parent_class)->finalize (object); } static void meta_wayland_dma_buf_buffer_init (MetaWaylandDmaBufBuffer *dma_buf) { int i; dma_buf->drm_modifier = DRM_FORMAT_MOD_INVALID; for (i = 0; i < META_WAYLAND_DMA_BUF_MAX_FDS; i++) dma_buf->fds[i] = -1; } static void meta_wayland_dma_buf_buffer_class_init (MetaWaylandDmaBufBufferClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = meta_wayland_dma_buf_buffer_finalize; }