mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-10-07 01:54:58 +00:00
dmabuf: implement linux_dmabuf extension
v2 changes: - implement the revised protocol - add basic sanity checks when creating buffer and check for support - add way to attach user data to the dmabuf for renderer use - bump max number of planes to 4 to follow DRM AddFb2 ioctl - improve errors handling - use separate linux_dmabuf_buffer fields for the different wl_resource types - as SERVER_ERROR code is no more, use a wl_display "generic" error for emergency-disconneting a client we fail to process - more documentation - change y-invert from per-plane boolean to per-buffer flag Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com> Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Pekka Paalanen
parent
23ab7159d2
commit
230f3b1bf8
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@ -87,6 +87,8 @@ weston_SOURCES = \
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src/timeline.h \
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src/timeline-object.h \
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src/main.c \
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src/linux-dmabuf.c \
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src/linux-dmabuf.h \
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shared/helpers.h \
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shared/matrix.c \
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shared/matrix.h \
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@ -4672,6 +4672,34 @@ weston_compositor_read_presentation_clock(
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}
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}
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/** Import dmabuf buffer into current renderer
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*
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* \param compositor
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* \param buffer the dmabuf buffer to import
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* \return true on usable buffers, false otherwise
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*
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* This function tests that the linux_dmabuf_buffer is usable
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* for the current renderer. Returns false on unusable buffers. Usually
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* usability is tested by importing the dmabufs for composition.
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*
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* This hook is also used for detecting if the renderer supports
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* dmabufs at all. If the renderer hook is NULL, dmabufs are not
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* supported.
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* */
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WL_EXPORT bool
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weston_compositor_import_dmabuf(struct weston_compositor *compositor,
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struct linux_dmabuf_buffer *buffer)
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{
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struct weston_renderer *renderer;
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renderer = compositor->renderer;
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if (renderer->import_dmabuf == NULL)
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return false;
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return renderer->import_dmabuf(compositor, buffer);
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}
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WL_EXPORT void
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weston_version(int *major, int *minor, int *micro)
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{
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@ -57,6 +57,7 @@ struct weston_seat;
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struct weston_output;
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struct input_method;
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struct weston_pointer;
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struct linux_dmabuf_buffer;
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enum weston_keyboard_modifier {
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MODIFIER_CTRL = (1 << 0),
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@ -588,6 +589,10 @@ struct weston_renderer {
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void *target, size_t size,
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int src_x, int src_y,
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int width, int height);
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/** See weston_compositor_import_dmabuf() */
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bool (*import_dmabuf)(struct weston_compositor *ec,
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struct linux_dmabuf_buffer *buffer);
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};
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enum weston_capability {
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@ -1364,6 +1369,10 @@ weston_compositor_read_presentation_clock(
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const struct weston_compositor *compositor,
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struct timespec *ts);
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bool
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weston_compositor_import_dmabuf(struct weston_compositor *compositor,
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struct linux_dmabuf_buffer *buffer);
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void
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weston_compositor_shutdown(struct weston_compositor *ec);
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void
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497
src/linux-dmabuf.c
Normal file
497
src/linux-dmabuf.c
Normal file
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@ -0,0 +1,497 @@
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/*
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* Copyright © 2014, 2015 Collabora, Ltd.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The copyright holders make
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <assert.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "compositor.h"
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#include "linux-dmabuf.h"
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#include "linux-dmabuf-server-protocol.h"
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static void
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linux_dmabuf_buffer_destroy(struct linux_dmabuf_buffer *buffer)
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{
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int i;
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for (i = 0; i < buffer->n_planes; i++) {
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close(buffer->dmabuf_fd[i]);
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buffer->dmabuf_fd[i] = -1;
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}
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buffer->n_planes = 0;
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free(buffer);
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}
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static void
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destroy_params(struct wl_resource *params_resource)
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{
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struct linux_dmabuf_buffer *buffer;
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buffer = wl_resource_get_user_data(params_resource);
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if (!buffer)
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return;
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linux_dmabuf_buffer_destroy(buffer);
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}
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static void
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params_destroy(struct wl_client *client, struct wl_resource *resource)
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{
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wl_resource_destroy(resource);
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}
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static void
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params_add(struct wl_client *client,
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struct wl_resource *params_resource,
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int32_t name_fd,
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uint32_t plane_idx,
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uint32_t offset,
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uint32_t stride,
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uint32_t modifier_hi,
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uint32_t modifier_lo)
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{
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struct linux_dmabuf_buffer *buffer;
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buffer = wl_resource_get_user_data(params_resource);
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if (!buffer) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_ALREADY_USED,
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"params was already used to create a wl_buffer");
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close(name_fd);
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return;
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}
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assert(buffer->params_resource == params_resource);
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assert(!buffer->buffer_resource);
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if (plane_idx >= MAX_DMABUF_PLANES) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_PLANE_IDX,
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"plane index %u is too high", plane_idx);
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close(name_fd);
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return;
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}
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if (buffer->dmabuf_fd[plane_idx] != -1) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_PLANE_SET,
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"a dmabuf has already been added for plane %u",
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plane_idx);
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close(name_fd);
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return;
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}
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buffer->dmabuf_fd[plane_idx] = name_fd;
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buffer->offset[plane_idx] = offset;
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buffer->stride[plane_idx] = stride;
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buffer->modifier[plane_idx] = ((uint64_t)modifier_hi << 32) |
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modifier_lo;
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buffer->n_planes++;
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}
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static void
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linux_dmabuf_wl_buffer_destroy(struct wl_client *client,
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struct wl_resource *resource)
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{
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wl_resource_destroy(resource);
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}
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static const struct wl_buffer_interface linux_dmabuf_buffer_implementation = {
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linux_dmabuf_wl_buffer_destroy
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};
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static void
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destroy_linux_dmabuf_wl_buffer(struct wl_resource *resource)
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{
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struct linux_dmabuf_buffer *buffer;
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buffer = wl_resource_get_user_data(resource);
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assert(buffer->buffer_resource == resource);
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assert(!buffer->params_resource);
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if (buffer->user_data_destroy_func)
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buffer->user_data_destroy_func(buffer);
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linux_dmabuf_buffer_destroy(buffer);
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}
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static void
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params_create(struct wl_client *client,
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struct wl_resource *params_resource,
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int32_t width,
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int32_t height,
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uint32_t format,
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uint32_t flags)
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{
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struct linux_dmabuf_buffer *buffer;
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int i;
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buffer = wl_resource_get_user_data(params_resource);
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if (!buffer) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_ALREADY_USED,
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"params was already used to create a wl_buffer");
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return;
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}
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assert(buffer->params_resource == params_resource);
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assert(!buffer->buffer_resource);
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/* Switch the linux_dmabuf_buffer object from params resource to
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* eventually wl_buffer resource.
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*/
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wl_resource_set_user_data(buffer->params_resource, NULL);
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buffer->params_resource = NULL;
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if (!buffer->n_planes) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_INCOMPLETE,
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"no dmabuf has been added to the params");
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goto err_out;
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}
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/* Check for holes in the dmabufs set (e.g. [0, 1, 3]) */
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for (i = 0; i < buffer->n_planes; i++) {
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if (buffer->dmabuf_fd[i] == -1) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_INCOMPLETE,
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"no dmabuf has been added for plane %i", i);
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goto err_out;
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}
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}
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buffer->width = width;
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buffer->height = height;
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buffer->format = format;
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buffer->flags = flags;
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if (width < 1 || height < 1) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_INVALID_DIMENSIONS,
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"invalid width %d or height %d", width, height);
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goto err_out;
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}
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for (i = 0; i < buffer->n_planes; i++) {
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off_t size;
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if ((uint64_t) buffer->offset[i] + buffer->stride[i] > UINT32_MAX) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_OUT_OF_BOUNDS,
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"size overflow for plane %i", i);
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goto err_out;
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}
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if (i == 0 &&
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(uint64_t) buffer->offset[i] +
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(uint64_t) buffer->stride[i] * height > UINT32_MAX) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_OUT_OF_BOUNDS,
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"size overflow for plane %i", i);
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goto err_out;
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}
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/* Don't report an error as it might be caused
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* by the kernel not supporting seeking on dmabuf */
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size = lseek(buffer->dmabuf_fd[i], 0, SEEK_END);
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if (size == -1)
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break;
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if (buffer->offset[i] >= size) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_OUT_OF_BOUNDS,
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"invalid offset %i for plane %i",
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buffer->offset[i], i);
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goto err_out;
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}
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if (buffer->offset[i] + buffer->stride[i] > size) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_OUT_OF_BOUNDS,
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"invalid stride %i for plane %i",
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buffer->stride[i], i);
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goto err_out;
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}
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/* Only valid for first plane as other planes might be
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* sub-sampled according to fourcc format */
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if (i == 0 &&
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buffer->offset[i] + buffer->stride[i] * height > size) {
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wl_resource_post_error(params_resource,
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ZLINUX_BUFFER_PARAMS_ERROR_OUT_OF_BOUNDS,
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"invalid buffer stride or height for plane %i", i);
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goto err_out;
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}
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}
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/* XXX: Some additional sanity checks could be done with respect
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* to the fourcc format. A centralized collection (kernel or
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* libdrm) would be useful to avoid code duplication for these
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* checks (e.g. drm_format_num_planes).
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*/
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if (!weston_compositor_import_dmabuf(buffer->compositor, buffer))
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goto err_failed;
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buffer->buffer_resource = wl_resource_create(client,
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&wl_buffer_interface,
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1, 0);
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if (!buffer->buffer_resource) {
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wl_resource_post_no_memory(params_resource);
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goto err_buffer;
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}
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wl_resource_set_implementation(buffer->buffer_resource,
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&linux_dmabuf_buffer_implementation,
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buffer, destroy_linux_dmabuf_wl_buffer);
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zlinux_buffer_params_send_created(params_resource,
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buffer->buffer_resource);
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return;
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err_buffer:
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if (buffer->user_data_destroy_func)
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buffer->user_data_destroy_func(buffer);
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err_failed:
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zlinux_buffer_params_send_failed(params_resource);
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err_out:
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linux_dmabuf_buffer_destroy(buffer);
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}
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static const struct zlinux_buffer_params_interface
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zlinux_buffer_params_implementation = {
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params_destroy,
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params_add,
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params_create
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};
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static void
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linux_dmabuf_destroy(struct wl_client *client, struct wl_resource *resource)
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{
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wl_resource_destroy(resource);
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}
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static void
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linux_dmabuf_create_params(struct wl_client *client,
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struct wl_resource *linux_dmabuf_resource,
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uint32_t params_id)
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{
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struct weston_compositor *compositor;
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struct linux_dmabuf_buffer *buffer;
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uint32_t version;
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int i;
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version = wl_resource_get_version(linux_dmabuf_resource);
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compositor = wl_resource_get_user_data(linux_dmabuf_resource);
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buffer = zalloc(sizeof *buffer);
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if (!buffer)
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goto err_out;
|
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|
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for (i = 0; i < MAX_DMABUF_PLANES; i++)
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buffer->dmabuf_fd[i] = -1;
|
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buffer->compositor = compositor;
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buffer->params_resource =
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wl_resource_create(client,
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&zlinux_buffer_params_interface,
|
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version, params_id);
|
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if (!buffer->params_resource)
|
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goto err_dealloc;
|
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wl_resource_set_implementation(buffer->params_resource,
|
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&zlinux_buffer_params_implementation,
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buffer, destroy_params);
|
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|
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return;
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|
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err_dealloc:
|
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free(buffer);
|
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|
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err_out:
|
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wl_resource_post_no_memory(linux_dmabuf_resource);
|
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}
|
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/** Get the linux_dmabuf_buffer from a wl_buffer resource
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*
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* If the given wl_buffer resource was created through the linux_dmabuf
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* protocol interface, returns the linux_dmabuf_buffer object. This can
|
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* be used as a type check for a wl_buffer.
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*
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* \param resource A wl_buffer resource.
|
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* \return The linux_dmabuf_buffer if it exists, or NULL otherwise.
|
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*/
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WL_EXPORT struct linux_dmabuf_buffer *
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linux_dmabuf_buffer_get(struct wl_resource *resource)
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{
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struct linux_dmabuf_buffer *buffer;
|
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|
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if (!resource)
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return NULL;
|
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|
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if (!wl_resource_instance_of(resource, &wl_buffer_interface,
|
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&linux_dmabuf_buffer_implementation))
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return NULL;
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buffer = wl_resource_get_user_data(resource);
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assert(buffer);
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assert(!buffer->params_resource);
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assert(buffer->buffer_resource == resource);
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return buffer;
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}
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/** Set renderer-private data
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*
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* Set the user data for the linux_dmabuf_buffer. It is invalid to overwrite
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* a non-NULL user data with a new non-NULL pointer. This is meant to
|
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* protect against renderers fighting over linux_dmabuf_buffer user data
|
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* ownership.
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*
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* The renderer-private data is usually set from the
|
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* weston_renderer::import_dmabuf hook.
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*
|
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* \param buffer The linux_dmabuf_buffer object to set for.
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* \param data The new renderer-private data pointer.
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* \param func Destructor function to be called for the renderer-private
|
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* data when the linux_dmabuf_buffer gets destroyed.
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*
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* \sa weston_compositor_import_dmabuf
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*/
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WL_EXPORT void
|
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linux_dmabuf_buffer_set_user_data(struct linux_dmabuf_buffer *buffer,
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void *data,
|
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dmabuf_user_data_destroy_func func)
|
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{
|
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assert(data == NULL || buffer->user_data == NULL);
|
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|
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buffer->user_data = data;
|
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buffer->user_data_destroy_func = func;
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}
|
||||
|
||||
/** Get renderer-private data
|
||||
*
|
||||
* Get the user data from the linux_dmabuf_buffer.
|
||||
*
|
||||
* \param buffer The linux_dmabuf_buffer to query.
|
||||
* \return Renderer-private data pointer.
|
||||
*
|
||||
* \sa linux_dmabuf_buffer_set_user_data
|
||||
*/
|
||||
WL_EXPORT void *
|
||||
linux_dmabuf_buffer_get_user_data(struct linux_dmabuf_buffer *buffer)
|
||||
{
|
||||
return buffer->user_data;
|
||||
}
|
||||
|
||||
static const struct zlinux_dmabuf_interface linux_dmabuf_implementation = {
|
||||
linux_dmabuf_destroy,
|
||||
linux_dmabuf_create_params
|
||||
};
|
||||
|
||||
static void
|
||||
bind_linux_dmabuf(struct wl_client *client,
|
||||
void *data, uint32_t version, uint32_t id)
|
||||
{
|
||||
struct weston_compositor *compositor = data;
|
||||
struct wl_resource *resource;
|
||||
|
||||
resource = wl_resource_create(client, &zlinux_dmabuf_interface,
|
||||
version, id);
|
||||
if (resource == NULL) {
|
||||
wl_client_post_no_memory(client);
|
||||
return;
|
||||
}
|
||||
|
||||
wl_resource_set_implementation(resource, &linux_dmabuf_implementation,
|
||||
compositor, NULL);
|
||||
|
||||
/* EGL_EXT_image_dma_buf_import does not provide a way to query the
|
||||
* supported pixel formats. */
|
||||
/* XXX: send formats */
|
||||
}
|
||||
|
||||
/** Advertise linux_dmabuf support
|
||||
*
|
||||
* Calling this initializes the zlinux_dmabuf protocol support, so that
|
||||
* the interface will be advertised to clients. Essentially it creates a
|
||||
* global. Do not call this function multiple times in the compositor's
|
||||
* lifetime. There is no way to deinit explicitly, globals will be reaped
|
||||
* when the wl_display gets destroyed.
|
||||
*
|
||||
* \param compositor The compositor to init for.
|
||||
* \return Zero on success, -1 on failure.
|
||||
*/
|
||||
WL_EXPORT int
|
||||
linux_dmabuf_setup(struct weston_compositor *compositor)
|
||||
{
|
||||
if (!wl_global_create(compositor->wl_display,
|
||||
&zlinux_dmabuf_interface, 1,
|
||||
compositor, bind_linux_dmabuf))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Resolve an internal compositor error by disconnecting the client.
|
||||
*
|
||||
* This function is used in cases when the dmabuf-based wl_buffer
|
||||
* turns out unusable and there is no fallback path. This is used by
|
||||
* renderers which are the fallback path in the first place.
|
||||
*
|
||||
* It is possible the fault is caused by a compositor bug, the underlying
|
||||
* graphics stack bug or normal behaviour, or perhaps a client mistake.
|
||||
* In any case, the options are to either composite garbage or nothing,
|
||||
* or disconnect the client. This is a helper function for the latter.
|
||||
*
|
||||
* The error is sent as a INVALID_OBJECT error on the client's wl_display.
|
||||
*
|
||||
* \param buffer The linux_dmabuf_buffer that is unusable.
|
||||
* \param msg A custom error message attached to the protocol error.
|
||||
*/
|
||||
WL_EXPORT void
|
||||
linux_dmabuf_buffer_send_server_error(struct linux_dmabuf_buffer *buffer,
|
||||
const char *msg)
|
||||
{
|
||||
struct wl_client *client;
|
||||
struct wl_resource *display_resource;
|
||||
uint32_t id;
|
||||
|
||||
assert(buffer->buffer_resource);
|
||||
id = wl_resource_get_id(buffer->buffer_resource);
|
||||
client = wl_resource_get_client(buffer->buffer_resource);
|
||||
display_resource = wl_client_get_object(client, 1);
|
||||
|
||||
assert(display_resource);
|
||||
wl_resource_post_error(display_resource,
|
||||
WL_DISPLAY_ERROR_INVALID_OBJECT,
|
||||
"linux_dmabuf server error with "
|
||||
"wl_buffer@%u: %s", id, msg);
|
||||
}
|
||||
84
src/linux-dmabuf.h
Normal file
84
src/linux-dmabuf.h
Normal file
|
|
@ -0,0 +1,84 @@
|
|||
/*
|
||||
* Copyright © 2014, 2015 Collabora, Ltd.
|
||||
*
|
||||
* Permission to use, copy, modify, distribute, and sell this software and
|
||||
* its documentation for any purpose is hereby granted without fee, provided
|
||||
* that the above copyright notice appear in all copies and that both that
|
||||
* copyright notice and this permission notice appear in supporting
|
||||
* documentation, and that the name of the copyright holders not be used in
|
||||
* advertising or publicity pertaining to distribution of the software
|
||||
* without specific, written prior permission. The copyright holders make
|
||||
* no representations about the suitability of this software for any
|
||||
* purpose. It is provided "as is" without express or implied warranty.
|
||||
*
|
||||
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
|
||||
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
||||
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||||
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
|
||||
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
|
||||
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
||||
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef WESTON_LINUX_DMABUF_H
|
||||
#define WESTON_LINUX_DMABUF_H
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#define MAX_DMABUF_PLANES 4
|
||||
|
||||
struct linux_dmabuf_buffer;
|
||||
typedef void (*dmabuf_user_data_destroy_func)(
|
||||
struct linux_dmabuf_buffer *buffer);
|
||||
|
||||
struct linux_dmabuf_buffer {
|
||||
struct wl_resource *buffer_resource;
|
||||
struct wl_resource *params_resource;
|
||||
struct weston_compositor *compositor;
|
||||
int32_t width;
|
||||
int32_t height;
|
||||
uint32_t format;
|
||||
uint32_t flags; /* enum zlinux_buffer_params_flags */
|
||||
int n_planes;
|
||||
int dmabuf_fd[MAX_DMABUF_PLANES];
|
||||
uint32_t offset[MAX_DMABUF_PLANES];
|
||||
uint32_t stride[MAX_DMABUF_PLANES];
|
||||
uint64_t modifier[MAX_DMABUF_PLANES];
|
||||
|
||||
void *user_data;
|
||||
dmabuf_user_data_destroy_func user_data_destroy_func;
|
||||
|
||||
/* XXX:
|
||||
*
|
||||
* Add backend private data. This would be for the backend
|
||||
* to do all additional imports it might ever use in advance.
|
||||
* The basic principle, even if not implemented in drivers today,
|
||||
* is that dmabufs are first attached, but the actual allocation
|
||||
* is deferred to first use. This would allow the exporter and all
|
||||
* attachers to agree on how to allocate.
|
||||
*
|
||||
* The DRM backend would use this to create drmFBs for each
|
||||
* dmabuf_buffer, just in case at some point it would become
|
||||
* feasible to scan it out directly. This would improve the
|
||||
* possibilities to successfully scan out, avoiding compositing.
|
||||
*/
|
||||
};
|
||||
|
||||
int
|
||||
linux_dmabuf_setup(struct weston_compositor *compositor);
|
||||
|
||||
struct linux_dmabuf_buffer *
|
||||
linux_dmabuf_buffer_get(struct wl_resource *resource);
|
||||
|
||||
void
|
||||
linux_dmabuf_buffer_set_user_data(struct linux_dmabuf_buffer *buffer,
|
||||
void *data,
|
||||
dmabuf_user_data_destroy_func func);
|
||||
void *
|
||||
linux_dmabuf_buffer_get_user_data(struct linux_dmabuf_buffer *buffer);
|
||||
|
||||
void
|
||||
linux_dmabuf_buffer_send_server_error(struct linux_dmabuf_buffer *buffer,
|
||||
const char *msg);
|
||||
|
||||
#endif /* WESTON_LINUX_DMABUF_H */
|
||||
Loading…
Reference in a new issue