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backend/headless: implement get_drm_fd

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This commit is contained in:
Simon Ser 2021-01-07 19:24:13 +01:00
parent 6dfc8ce00b
commit affc59454e
2 changed files with 50 additions and 30 deletions
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79
backend/headless/backend.c
View file

@ -75,6 +75,7 @@ static void backend_destroy(struct wlr_backend *wlr_backend) {
} }
wlr_allocator_destroy(backend->allocator); wlr_allocator_destroy(backend->allocator);
close(backend->drm_fd);
free(backend); free(backend);
} }
@ -85,10 +86,17 @@ static struct wlr_renderer *backend_get_renderer(
return backend->renderer; return backend->renderer;
} }
static int backend_get_drm_fd(struct wlr_backend *wlr_backend) {
struct wlr_headless_backend *backend =
headless_backend_from_backend(wlr_backend);
return backend->drm_fd;
}
static const struct wlr_backend_impl backend_impl = { static const struct wlr_backend_impl backend_impl = {
.start = backend_start, .start = backend_start,
.destroy = backend_destroy, .destroy = backend_destroy,
.get_renderer = backend_get_renderer, .get_renderer = backend_get_renderer,
.get_drm_fd = backend_get_drm_fd,
}; };
static void handle_display_destroy(struct wl_listener *listener, void *data) { static void handle_display_destroy(struct wl_listener *listener, void *data) {
@ -185,23 +193,30 @@ out:
struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) { struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
wlr_log(WLR_INFO, "Creating headless backend"); wlr_log(WLR_INFO, "Creating headless backend");
int drm_fd = open_drm_render_node(); struct wlr_headless_backend *backend =
if (drm_fd < 0) { calloc(1, sizeof(struct wlr_headless_backend));
wlr_log(WLR_ERROR, "Failed to open DRM render node"); if (!backend) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
return NULL; return NULL;
} }
backend->drm_fd = open_drm_render_node();
if (backend->drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to open DRM render node");
goto error_drm_fd;
}
int drm_fd = fcntl(backend->drm_fd, F_DUPFD_CLOEXEC, 0);
if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
goto error_dup;
}
struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd); struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd);
if (gbm_alloc == NULL) { if (gbm_alloc == NULL) {
wlr_log(WLR_ERROR, "Failed to create GBM allocator"); wlr_log(WLR_ERROR, "Failed to create GBM allocator");
return false; close(drm_fd);
} goto error_dup;
struct wlr_headless_backend *backend =
calloc(1, sizeof(struct wlr_headless_backend));
if (!backend) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
goto error_backend;
} }
struct wlr_renderer *renderer = wlr_renderer_autocreate( struct wlr_renderer *renderer = wlr_renderer_autocreate(
@ -220,9 +235,11 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
error_init: error_init:
wlr_renderer_destroy(renderer); wlr_renderer_destroy(renderer);
error_renderer: error_renderer:
free(backend);
error_backend:
wlr_allocator_destroy(&gbm_alloc->base); wlr_allocator_destroy(&gbm_alloc->base);
error_dup:
close(backend->drm_fd);
error_drm_fd:
free(backend);
return NULL; return NULL;
} }
@ -230,33 +247,33 @@ struct wlr_backend *wlr_headless_backend_create_with_renderer(
struct wl_display *display, struct wlr_renderer *renderer) { struct wl_display *display, struct wlr_renderer *renderer) {
wlr_log(WLR_INFO, "Creating headless backend with parent renderer"); wlr_log(WLR_INFO, "Creating headless backend with parent renderer");
int drm_fd = wlr_renderer_get_drm_fd(renderer); struct wlr_headless_backend *backend =
if (drm_fd < 0) { calloc(1, sizeof(struct wlr_headless_backend));
if (!backend) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
return NULL;
}
backend->has_parent_renderer = true;
backend->drm_fd = wlr_renderer_get_drm_fd(renderer);
if (backend->drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer"); wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer");
return false; goto error_drm_fd;
} }
drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0); int drm_fd = fcntl(backend->drm_fd, F_DUPFD_CLOEXEC, 0);
if (drm_fd < 0) { if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed"); wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
return false; goto error_dup;
} }
struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd); struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd);
if (gbm_alloc == NULL) { if (gbm_alloc == NULL) {
wlr_log(WLR_ERROR, "Failed to create GBM allocator"); wlr_log(WLR_ERROR, "Failed to create GBM allocator");
return false; close(drm_fd);
goto error_dup;
} }
struct wlr_headless_backend *backend =
calloc(1, sizeof(struct wlr_headless_backend));
if (!backend) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
goto error_backend;
}
backend->has_parent_renderer = true;
if (!backend_init(backend, display, &gbm_alloc->base, renderer)) { if (!backend_init(backend, display, &gbm_alloc->base, renderer)) {
goto error_init; goto error_init;
} }
@ -267,9 +284,11 @@ struct wlr_backend *wlr_headless_backend_create_with_renderer(
return &backend->backend; return &backend->backend;
error_init: error_init:
free(backend);
error_backend:
wlr_allocator_destroy(&gbm_alloc->base); wlr_allocator_destroy(&gbm_alloc->base);
error_dup:
close(backend->drm_fd);
error_drm_fd:
free(backend);
return NULL; return NULL;
} }

1
include/backend/headless.h
View file

@ -8,6 +8,7 @@
struct wlr_headless_backend { struct wlr_headless_backend {
struct wlr_backend backend; struct wlr_backend backend;
int drm_fd;
struct wlr_renderer *renderer; struct wlr_renderer *renderer;
struct wlr_allocator *allocator; struct wlr_allocator *allocator;
struct wlr_drm_format *format; struct wlr_drm_format *format;