342 lines
10 KiB
C
342 lines
10 KiB
C
/*
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* va_wayland_drm.c - Wayland/DRM helpers
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*
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* Copyright (c) 2012 Intel Corporation. All Rights Reserved.
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* Copyright (c) 2023 Emil Velikov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "sysdeps.h"
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <sys/stat.h>
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#include <xf86drm.h>
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#include "va_drmcommon.h"
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#include "drm/va_drm_utils.h"
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#include "va_wayland_drm.h"
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#include "va_wayland_private.h"
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#include "wayland-drm-client-protocol.h"
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typedef struct va_wayland_drm_context {
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struct va_wayland_context base;
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struct wl_event_queue *queue;
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struct wl_drm *drm;
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uint32_t drm_name;
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struct wl_registry *registry;
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unsigned int is_authenticated : 1;
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} VADisplayContextWaylandDRM;
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static void
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drm_handle_device(void *data, struct wl_drm *drm, const char *device)
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{
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VADisplayContextP const pDisplayContext = data;
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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VADisplayContextWaylandDRM * const wl_drm_ctx = pDisplayContext->opaque;
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struct drm_state * const drm_state = ctx->drm_state;
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drm_magic_t magic;
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struct stat st;
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int fd = -1;
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fd = open(device, O_RDWR);
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if (fd < 0) {
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va_wayland_error("failed to open %s: %s (errno %d)",
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device, strerror(errno), errno);
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return;
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}
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if (fstat(fd, &st) < 0) {
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va_wayland_error("failed to identify %s: %s (errno %d)",
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device, strerror(errno), errno);
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close(fd);
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return;
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}
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if (!S_ISCHR(st.st_mode)) {
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va_wayland_error("%s is not a device", device);
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close(fd);
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return;
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}
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drm_state->fd = fd;
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int type = drmGetNodeTypeFromFd(fd);
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if (type != DRM_NODE_RENDER) {
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drmGetMagic(drm_state->fd, &magic);
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wl_drm_authenticate(wl_drm_ctx->drm, magic);
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} else {
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wl_drm_ctx->is_authenticated = 1;
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drm_state->auth_type = VA_DRM_AUTH_CUSTOM;
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}
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}
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static void
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drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
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{
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}
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static void
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drm_handle_authenticated(void *data, struct wl_drm *drm)
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{
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VADisplayContextP const pDisplayContext = data;
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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VADisplayContextWaylandDRM * const wl_drm_ctx = pDisplayContext->opaque;
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struct drm_state * const drm_state = ctx->drm_state;
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wl_drm_ctx->is_authenticated = 1;
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drm_state->auth_type = VA_DRM_AUTH_CUSTOM;
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}
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static void
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drm_handle_capabilities(void *data, struct wl_drm *wl_drm, uint32_t value)
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{
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VADisplayContextP const pDisplayContext = data;
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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struct VADriverVTableWayland *vtable = ctx->vtable_wayland;
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vtable->has_prime_sharing = !!(value & WL_DRM_CAPABILITY_PRIME);
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}
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static const struct wl_drm_listener drm_listener = {
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drm_handle_device,
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drm_handle_format,
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drm_handle_authenticated,
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drm_handle_capabilities,
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};
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static VAStatus
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va_DisplayContextGetDriverNames(
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VADisplayContextP pDisplayContext,
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char **drivers,
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unsigned *num_drivers
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)
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{
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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return VA_DRM_GetDriverNames(ctx, drivers, num_drivers);
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}
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void
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va_wayland_drm_destroy(VADisplayContextP pDisplayContext)
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{
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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struct va_wayland_drm_context * const wl_drm_ctx = pDisplayContext->opaque;
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struct drm_state * const drm_state = ctx->drm_state;
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struct VADriverVTableWayland *vtable = ctx->vtable_wayland;
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vtable->has_prime_sharing = 0;
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vtable->wl_interface = NULL;
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wl_drm_ctx->is_authenticated = 0;
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if (drm_state) {
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if (drm_state->fd >= 0) {
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close(drm_state->fd);
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drm_state->fd = -1;
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}
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free(ctx->drm_state);
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ctx->drm_state = NULL;
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}
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}
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static void
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registry_handle_global(
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void *data,
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struct wl_registry *registry,
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uint32_t name,
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const char *interface,
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uint32_t version
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)
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{
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VADisplayContextP const pDisplayContext = data;
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struct va_wayland_drm_context * const wl_drm_ctx = pDisplayContext->opaque;
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if (strcmp(interface, "wl_drm") == 0) {
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/* bind to at most version 2, but also support version 1 if
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* compositor does not have v2
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*/
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wl_drm_ctx->drm_name = name;
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wl_drm_ctx->drm =
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wl_registry_bind(wl_drm_ctx->registry, name, &wl_drm_interface,
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(version < 2) ? version : 2);
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if (wl_drm_ctx->drm
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&& wl_drm_add_listener(wl_drm_ctx->drm, &drm_listener, pDisplayContext) != 0) {
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va_wayland_error("could not add listener to wl_drm");
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wl_drm_destroy(wl_drm_ctx->drm);
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wl_drm_ctx->drm = NULL;
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}
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}
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}
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static void
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registry_handle_global_remove(
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void *data,
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struct wl_registry *registry,
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uint32_t name
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)
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{
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struct va_wayland_drm_context *wl_drm_ctx = data;
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if (wl_drm_ctx->drm && name == wl_drm_ctx->drm_name) {
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wl_drm_destroy(wl_drm_ctx->drm);
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wl_drm_ctx->drm = NULL;
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}
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}
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static const struct wl_registry_listener registry_listener = {
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registry_handle_global,
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registry_handle_global_remove
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};
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static bool
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wayland_roundtrip_queue(struct wl_display *display,
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struct wl_event_queue *queue)
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{
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if (wl_display_roundtrip_queue(display, queue) < 0) {
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int err = wl_display_get_error(display);
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va_wayland_error("Wayland roundtrip error: %s (errno %d)", strerror(err), err);
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return false;
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} else {
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return true;
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}
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}
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bool
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va_wayland_drm_create(VADisplayContextP pDisplayContext)
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{
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bool result = false;
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VADriverContextP const ctx = pDisplayContext->pDriverContext;
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struct va_wayland_drm_context *wl_drm_ctx;
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struct drm_state *drm_state;
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struct VADriverVTableWayland *vtable = ctx->vtable_wayland;
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struct wl_display *wrapped_display = NULL;
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vtable->wl_interface = NULL;
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wl_drm_ctx = malloc(sizeof(*wl_drm_ctx));
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if (!wl_drm_ctx) {
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va_wayland_error("could not allocate wl_drm_ctx");
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goto end;
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}
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wl_drm_ctx->base.destroy = va_wayland_drm_destroy;
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wl_drm_ctx->queue = NULL;
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wl_drm_ctx->drm = NULL;
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wl_drm_ctx->registry = NULL;
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wl_drm_ctx->is_authenticated = 0;
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pDisplayContext->opaque = wl_drm_ctx;
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pDisplayContext->vaGetDriverNames = va_DisplayContextGetDriverNames;
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drm_state = calloc(1, sizeof(struct drm_state));
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if (!drm_state) {
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va_wayland_error("could not allocate drm_state");
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goto end;
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}
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drm_state->fd = -1;
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drm_state->auth_type = 0;
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ctx->drm_state = drm_state;
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vtable->has_prime_sharing = 0;
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/* Use wrapped wl_display with private event queue to prevent
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* thread safety issues with applications that e.g. run an event pump
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* parallel to libva initialization.
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* Using the default queue, events might get lost and crashes occur
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* because wl_display_roundtrip is not thread-safe with respect to the
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* same queue.
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*/
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wl_drm_ctx->queue = wl_display_create_queue(ctx->native_dpy);
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if (!wl_drm_ctx->queue) {
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va_wayland_error("could not create Wayland event queue");
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goto end;
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}
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wrapped_display = wl_proxy_create_wrapper(ctx->native_dpy);
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if (!wrapped_display) {
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va_wayland_error("could not create Wayland proxy wrapper");
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goto end;
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}
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/* All created objects will inherit this queue */
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wl_proxy_set_queue((struct wl_proxy *) wrapped_display, wl_drm_ctx->queue);
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wl_drm_ctx->registry = wl_display_get_registry(wrapped_display);
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if (!wl_drm_ctx->registry) {
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va_wayland_error("could not create wl_registry");
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goto end;
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}
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if (wl_registry_add_listener(wl_drm_ctx->registry, ®istry_listener, pDisplayContext) != 0) {
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va_wayland_error("could not add listener to wl_registry");
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goto end;
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}
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if (!wayland_roundtrip_queue(ctx->native_dpy, wl_drm_ctx->queue))
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goto end;
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/* registry_handle_global should have been called by the
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* wl_display_roundtrip_queue above
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*/
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/* Do not print an error, the compositor might just not support wl_drm */
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if (!wl_drm_ctx->drm)
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goto end;
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if (!wayland_roundtrip_queue(ctx->native_dpy, wl_drm_ctx->queue))
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goto end;
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if (drm_state->fd < 0) {
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va_wayland_error("did not get DRM device");
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goto end;
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}
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if (!wayland_roundtrip_queue(ctx->native_dpy, wl_drm_ctx->queue))
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goto end;
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if (!wl_drm_ctx->is_authenticated) {
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va_wayland_error("Wayland compositor did not respond to DRM authentication");
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goto end;
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}
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vtable->wl_interface = &wl_drm_interface;
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result = true;
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end:
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if (wrapped_display) {
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wl_proxy_wrapper_destroy(wrapped_display);
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wrapped_display = NULL;
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}
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if (wl_drm_ctx) {
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if (wl_drm_ctx->drm) {
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wl_drm_destroy(wl_drm_ctx->drm);
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wl_drm_ctx->drm = NULL;
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}
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if (wl_drm_ctx->registry) {
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wl_registry_destroy(wl_drm_ctx->registry);
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wl_drm_ctx->registry = NULL;
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}
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if (wl_drm_ctx->queue) {
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wl_event_queue_destroy(wl_drm_ctx->queue);
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wl_drm_ctx->queue = NULL;
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}
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}
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return result;
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}
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