mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Jussi Kukkonen](/assets/img/avatar_default.png)
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com> Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
499 lines
14 KiB
C
499 lines
14 KiB
C
/*
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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 <stdint.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-unstable-v1-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->attributes.n_planes; i++) {
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close(buffer->attributes.fd[i]);
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buffer->attributes.fd[i] = -1;
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}
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buffer->attributes.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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ZWP_LINUX_BUFFER_PARAMS_V1_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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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.fd[plane_idx] != -1) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.fd[plane_idx] = name_fd;
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buffer->attributes.offset[plane_idx] = offset;
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buffer->attributes.stride[plane_idx] = stride;
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buffer->attributes.modifier[plane_idx] = ((uint64_t)modifier_hi << 32) |
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modifier_lo;
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buffer->attributes.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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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.n_planes) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.n_planes; i++) {
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if (buffer->attributes.fd[i] == -1) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.width = width;
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buffer->attributes.height = height;
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buffer->attributes.format = format;
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buffer->attributes.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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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.n_planes; i++) {
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off_t size;
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if ((uint64_t) buffer->attributes.offset[i] + buffer->attributes.stride[i] > UINT32_MAX) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.offset[i] +
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(uint64_t) buffer->attributes.stride[i] * height > UINT32_MAX) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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->attributes.fd[i], 0, SEEK_END);
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if (size == -1)
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continue;
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if (buffer->attributes.offset[i] >= size) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_OUT_OF_BOUNDS,
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"invalid offset %i for plane %i",
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buffer->attributes.offset[i], i);
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goto err_out;
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}
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if (buffer->attributes.offset[i] + buffer->attributes.stride[i] > size) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_ERROR_OUT_OF_BOUNDS,
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"invalid stride %i for plane %i",
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buffer->attributes.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->attributes.offset[i] + buffer->attributes.stride[i] * height > size) {
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wl_resource_post_error(params_resource,
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ZWP_LINUX_BUFFER_PARAMS_V1_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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zwp_linux_buffer_params_v1_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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zwp_linux_buffer_params_v1_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 zwp_linux_buffer_params_v1_interface
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zwp_linux_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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for (i = 0; i < MAX_DMABUF_PLANES; i++)
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buffer->attributes.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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&zwp_linux_buffer_params_v1_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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&zwp_linux_buffer_params_implementation,
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buffer, destroy_params);
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return;
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err_dealloc:
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free(buffer);
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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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if (!resource)
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return NULL;
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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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buffer->user_data = data;
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buffer->user_data_destroy_func = func;
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}
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/** Get renderer-private data
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*
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* Get the user data from the linux_dmabuf_buffer.
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*
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* \param buffer The linux_dmabuf_buffer to query.
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* \return Renderer-private data pointer.
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*
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* \sa linux_dmabuf_buffer_set_user_data
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*/
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WL_EXPORT void *
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linux_dmabuf_buffer_get_user_data(struct linux_dmabuf_buffer *buffer)
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{
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return buffer->user_data;
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}
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static const struct zwp_linux_dmabuf_v1_interface linux_dmabuf_implementation = {
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linux_dmabuf_destroy,
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linux_dmabuf_create_params
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};
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static void
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bind_linux_dmabuf(struct wl_client *client,
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void *data, uint32_t version, uint32_t id)
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{
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struct weston_compositor *compositor = data;
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struct wl_resource *resource;
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resource = wl_resource_create(client, &zwp_linux_dmabuf_v1_interface,
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version, id);
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if (resource == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(resource, &linux_dmabuf_implementation,
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compositor, NULL);
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/* EGL_EXT_image_dma_buf_import does not provide a way to query the
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* supported pixel formats. */
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/* XXX: send formats */
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}
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/** Advertise linux_dmabuf support
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*
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* Calling this initializes the zwp_linux_dmabuf protocol support, so that
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* the interface will be advertised to clients. Essentially it creates a
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* global. Do not call this function multiple times in the compositor's
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* lifetime. There is no way to deinit explicitly, globals will be reaped
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* when the wl_display gets destroyed.
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*
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* \param compositor The compositor to init for.
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* \return Zero on success, -1 on failure.
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*/
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WL_EXPORT int
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linux_dmabuf_setup(struct weston_compositor *compositor)
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{
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if (!wl_global_create(compositor->wl_display,
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&zwp_linux_dmabuf_v1_interface, 1,
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compositor, bind_linux_dmabuf))
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return -1;
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return 0;
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}
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/** Resolve an internal compositor error by disconnecting the client.
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*
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* This function is used in cases when the dmabuf-based wl_buffer
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* turns out unusable and there is no fallback path. This is used by
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* renderers which are the fallback path in the first place.
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*
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* It is possible the fault is caused by a compositor bug, the underlying
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* graphics stack bug or normal behaviour, or perhaps a client mistake.
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* In any case, the options are to either composite garbage or nothing,
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* or disconnect the client. This is a helper function for the latter.
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*
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* The error is sent as an INVALID_OBJECT error on the client's wl_display.
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*
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* \param buffer The linux_dmabuf_buffer that is unusable.
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* \param msg A custom error message attached to the protocol error.
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*/
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WL_EXPORT void
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linux_dmabuf_buffer_send_server_error(struct linux_dmabuf_buffer *buffer,
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const char *msg)
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{
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struct wl_client *client;
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struct wl_resource *display_resource;
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uint32_t id;
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assert(buffer->buffer_resource);
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id = wl_resource_get_id(buffer->buffer_resource);
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client = wl_resource_get_client(buffer->buffer_resource);
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display_resource = wl_client_get_object(client, 1);
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assert(display_resource);
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wl_resource_post_error(display_resource,
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WL_DISPLAY_ERROR_INVALID_OBJECT,
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"linux_dmabuf server error with "
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"wl_buffer@%u: %s", id, msg);
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}
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