mirrors/weston
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

compositor-drm: Move FB handling to a separate file

Browse Source 
Move everything to do with creation, destruction, and reference handling
of drm_fbs to a new file.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone 2019-06-18 11:16:53 +01:00
parent 4c2fc7058a
commit 7580b3c09e
4 changed files with 571 additions and 510 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
libweston/backend-drm/drm-internal.h
View File

@ -508,6 +508,25 @@ drm_output_find_by_crtc(struct drm_backend *b, uint32_t crtc_id);
struct drm_head *
drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id);
static inline bool
drm_view_transform_supported(struct weston_view *ev, struct weston_output *output)
{
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
/* This will incorrectly disallow cases where the combination of
* buffer and view transformations match the output transform.
* Fixing this requires a full analysis of the transformation
* chain. */
if (ev->transform.enabled &&
ev->transform.matrix.type >= WESTON_MATRIX_TRANSFORM_ROTATE)
return false;
if (viewport->buffer.transform != output->transform)
return false;
return true;
}
int
drm_mode_ensure_blob(struct drm_backend *backend, struct drm_mode *mode);
@ -582,3 +601,17 @@ void
drm_output_state_free(struct drm_output_state *state);
void
drm_pending_state_free(struct drm_pending_state *pending_state);
struct drm_fb *
drm_fb_ref(struct drm_fb *fb);
void
drm_fb_unref(struct drm_fb *fb);
struct drm_fb *
drm_fb_create_dumb(struct drm_backend *b, int width, int height,
uint32_t format);
struct drm_fb *
drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend,
bool is_opaque, enum drm_fb_type type);
struct drm_fb *
drm_fb_get_from_view(struct drm_output_state *state, struct weston_view *ev);

510
libweston/backend-drm/drm.c
View File

@ -213,444 +213,6 @@ drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id)
return NULL;
}
static void
drm_fb_destroy(struct drm_fb *fb)
{
if (fb->fb_id != 0)
drmModeRmFB(fb->fd, fb->fb_id);
weston_buffer_reference(&fb->buffer_ref, NULL);
weston_buffer_release_reference(&fb->buffer_release_ref, NULL);
free(fb);
}
static void
drm_fb_destroy_dumb(struct drm_fb *fb)
{
struct drm_mode_destroy_dumb destroy_arg;
assert(fb->type == BUFFER_PIXMAN_DUMB);
if (fb->map && fb->size > 0)
munmap(fb->map, fb->size);
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = fb->handles[0];
drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
drm_fb_destroy(fb);
}
static void
drm_fb_destroy_gbm(struct gbm_bo *bo, void *data)
{
struct drm_fb *fb = data;
assert(fb->type == BUFFER_GBM_SURFACE || fb->type == BUFFER_CLIENT ||
fb->type == BUFFER_CURSOR);
drm_fb_destroy(fb);
}
static int
drm_fb_addfb(struct drm_backend *b, struct drm_fb *fb)
{
int ret = -EINVAL;
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
uint64_t mods[4] = { };
size_t i;
#endif
/* If we have a modifier set, we must only use the WithModifiers
* entrypoint; we cannot import it through legacy ioctls. */
if (b->fb_modifiers && fb->modifier != DRM_FORMAT_MOD_INVALID) {
/* KMS demands that if a modifier is set, it must be the same
* for all planes. */
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
for (i = 0; i < ARRAY_LENGTH(mods) && fb->handles[i]; i++)
mods[i] = fb->modifier;
ret = drmModeAddFB2WithModifiers(fb->fd, fb->width, fb->height,
fb->format->format,
fb->handles, fb->strides,
fb->offsets, mods, &fb->fb_id,
DRM_MODE_FB_MODIFIERS);
#endif
return ret;
}
ret = drmModeAddFB2(fb->fd, fb->width, fb->height, fb->format->format,
fb->handles, fb->strides, fb->offsets, &fb->fb_id,
0);
if (ret == 0)
return 0;
/* Legacy AddFB can't always infer the format from depth/bpp alone, so
* check if our format is one of the lucky ones. */
if (!fb->format->depth || !fb->format->bpp)
return ret;
/* Cannot fall back to AddFB for multi-planar formats either. */
if (fb->handles[1] || fb->handles[2] || fb->handles[3])
return ret;
ret = drmModeAddFB(fb->fd, fb->width, fb->height,
fb->format->depth, fb->format->bpp,
fb->strides[0], fb->handles[0], &fb->fb_id);
return ret;
}
static struct drm_fb *
drm_fb_create_dumb(struct drm_backend *b, int width, int height,
uint32_t format)
{
struct drm_fb *fb;
int ret;
struct drm_mode_create_dumb create_arg;
struct drm_mode_destroy_dumb destroy_arg;
struct drm_mode_map_dumb map_arg;
fb = zalloc(sizeof *fb);
if (!fb)
return NULL;
fb->refcnt = 1;
fb->format = pixel_format_get_info(format);
if (!fb->format) {
weston_log("failed to look up format 0x%lx\n",
(unsigned long) format);
goto err_fb;
}
if (!fb->format->depth || !fb->format->bpp) {
weston_log("format 0x%lx is not compatible with dumb buffers\n",
(unsigned long) format);
goto err_fb;
}
memset(&create_arg, 0, sizeof create_arg);
create_arg.bpp = fb->format->bpp;
create_arg.width = width;
create_arg.height = height;
ret = drmIoctl(b->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
if (ret)
goto err_fb;
fb->type = BUFFER_PIXMAN_DUMB;
fb->modifier = DRM_FORMAT_MOD_INVALID;
fb->handles[0] = create_arg.handle;
fb->strides[0] = create_arg.pitch;
fb->num_planes = 1;
fb->size = create_arg.size;
fb->width = width;
fb->height = height;
fb->fd = b->drm.fd;
if (drm_fb_addfb(b, fb) != 0) {
weston_log("failed to create kms fb: %s\n", strerror(errno));
goto err_bo;
}
memset(&map_arg, 0, sizeof map_arg);
map_arg.handle = fb->handles[0];
ret = drmIoctl(fb->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
if (ret)
goto err_add_fb;
fb->map = mmap(NULL, fb->size, PROT_WRITE,
MAP_SHARED, b->drm.fd, map_arg.offset);
if (fb->map == MAP_FAILED)
goto err_add_fb;
return fb;
err_add_fb:
drmModeRmFB(b->drm.fd, fb->fb_id);
err_bo:
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = create_arg.handle;
drmIoctl(b->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
err_fb:
free(fb);
return NULL;
}
static struct drm_fb *
drm_fb_ref(struct drm_fb *fb)
{
fb->refcnt++;
return fb;
}
static void
drm_fb_destroy_dmabuf(struct drm_fb *fb)
{
/* We deliberately do not close the GEM handles here; GBM manages
* their lifetime through the BO. */
if (fb->bo)
gbm_bo_destroy(fb->bo);
drm_fb_destroy(fb);
}
static struct drm_fb *
drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,
struct drm_backend *backend, bool is_opaque)
{
#ifdef HAVE_GBM_FD_IMPORT
struct drm_fb *fb;
struct gbm_import_fd_data import_legacy = {
.width = dmabuf->attributes.width,
.height = dmabuf->attributes.height,
.format = dmabuf->attributes.format,
.stride = dmabuf->attributes.stride[0],
.fd = dmabuf->attributes.fd[0],
};
struct gbm_import_fd_modifier_data import_mod = {
.width = dmabuf->attributes.width,
.height = dmabuf->attributes.height,
.format = dmabuf->attributes.format,
.num_fds = dmabuf->attributes.n_planes,
.modifier = dmabuf->attributes.modifier[0],
};
int i;
/* XXX: TODO:
*
* Currently the buffer is rejected if any dmabuf attribute
* flag is set. This keeps us from passing an inverted /
* interlaced / bottom-first buffer (or any other type that may
* be added in the future) through to an overlay. Ultimately,
* these types of buffers should be handled through buffer
* transforms and not as spot-checks requiring specific
* knowledge. */
if (dmabuf->attributes.flags)
return NULL;
fb = zalloc(sizeof *fb);
if (fb == NULL)
return NULL;
fb->refcnt = 1;
fb->type = BUFFER_DMABUF;
static_assert(ARRAY_LENGTH(import_mod.fds) ==
ARRAY_LENGTH(dmabuf->attributes.fd),
"GBM and linux_dmabuf FD size must match");
static_assert(sizeof(import_mod.fds) == sizeof(dmabuf->attributes.fd),
"GBM and linux_dmabuf FD size must match");
memcpy(import_mod.fds, dmabuf->attributes.fd, sizeof(import_mod.fds));
static_assert(ARRAY_LENGTH(import_mod.strides) ==
ARRAY_LENGTH(dmabuf->attributes.stride),
"GBM and linux_dmabuf stride size must match");
static_assert(sizeof(import_mod.strides) ==
sizeof(dmabuf->attributes.stride),
"GBM and linux_dmabuf stride size must match");
memcpy(import_mod.strides, dmabuf->attributes.stride,
sizeof(import_mod.strides));
static_assert(ARRAY_LENGTH(import_mod.offsets) ==
ARRAY_LENGTH(dmabuf->attributes.offset),
"GBM and linux_dmabuf offset size must match");
static_assert(sizeof(import_mod.offsets) ==
sizeof(dmabuf->attributes.offset),
"GBM and linux_dmabuf offset size must match");
memcpy(import_mod.offsets, dmabuf->attributes.offset,
sizeof(import_mod.offsets));
/* The legacy FD-import path does not allow us to supply modifiers,
* multiple planes, or buffer offsets. */
if (dmabuf->attributes.modifier[0] != DRM_FORMAT_MOD_INVALID ||
import_mod.num_fds > 1 ||
import_mod.offsets[0] > 0) {
fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD_MODIFIER,
&import_mod,
GBM_BO_USE_SCANOUT);
} else {
fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD,
&import_legacy,
GBM_BO_USE_SCANOUT);
}
if (!fb->bo)
goto err_free;
fb->width = dmabuf->attributes.width;
fb->height = dmabuf->attributes.height;
fb->modifier = dmabuf->attributes.modifier[0];
fb->size = 0;
fb->fd = backend->drm.fd;
static_assert(ARRAY_LENGTH(fb->strides) ==
ARRAY_LENGTH(dmabuf->attributes.stride),
"drm_fb and dmabuf stride size must match");
static_assert(sizeof(fb->strides) == sizeof(dmabuf->attributes.stride),
"drm_fb and dmabuf stride size must match");
memcpy(fb->strides, dmabuf->attributes.stride, sizeof(fb->strides));
static_assert(ARRAY_LENGTH(fb->offsets) ==
ARRAY_LENGTH(dmabuf->attributes.offset),
"drm_fb and dmabuf offset size must match");
static_assert(sizeof(fb->offsets) == sizeof(dmabuf->attributes.offset),
"drm_fb and dmabuf offset size must match");
memcpy(fb->offsets, dmabuf->attributes.offset, sizeof(fb->offsets));
fb->format = pixel_format_get_info(dmabuf->attributes.format);
if (!fb->format) {
weston_log("couldn't look up format info for 0x%lx\n",
(unsigned long) dmabuf->attributes.format);
goto err_free;
}
if (is_opaque)
fb->format = pixel_format_get_opaque_substitute(fb->format);
if (backend->min_width > fb->width ||
fb->width > backend->max_width ||
backend->min_height > fb->height ||
fb->height > backend->max_height) {
weston_log("bo geometry out of bounds\n");
goto err_free;
}
fb->num_planes = dmabuf->attributes.n_planes;
for (i = 0; i < dmabuf->attributes.n_planes; i++) {
union gbm_bo_handle handle;
handle = gbm_bo_get_handle_for_plane(fb->bo, i);
if (handle.s32 == -1)
goto err_free;
fb->handles[i] = handle.u32;
}
if (drm_fb_addfb(backend, fb) != 0)
goto err_free;
return fb;
err_free:
drm_fb_destroy_dmabuf(fb);
#endif
return NULL;
}
static struct drm_fb *
drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend,
bool is_opaque, enum drm_fb_type type)
{
struct drm_fb *fb = gbm_bo_get_user_data(bo);
#ifdef HAVE_GBM_MODIFIERS
int i;
#endif
if (fb) {
assert(fb->type == type);
return drm_fb_ref(fb);
}
fb = zalloc(sizeof *fb);
if (fb == NULL)
return NULL;
fb->type = type;
fb->refcnt = 1;
fb->bo = bo;
fb->fd = backend->drm.fd;
fb->width = gbm_bo_get_width(bo);
fb->height = gbm_bo_get_height(bo);
fb->format = pixel_format_get_info(gbm_bo_get_format(bo));
fb->size = 0;
#ifdef HAVE_GBM_MODIFIERS
fb->modifier = gbm_bo_get_modifier(bo);
fb->num_planes = gbm_bo_get_plane_count(bo);
for (i = 0; i < fb->num_planes; i++) {
fb->strides[i] = gbm_bo_get_stride_for_plane(bo, i);
fb->handles[i] = gbm_bo_get_handle_for_plane(bo, i).u32;
fb->offsets[i] = gbm_bo_get_offset(bo, i);
}
#else
fb->num_planes = 1;
fb->strides[0] = gbm_bo_get_stride(bo);
fb->handles[0] = gbm_bo_get_handle(bo).u32;
fb->modifier = DRM_FORMAT_MOD_INVALID;
#endif
if (!fb->format) {
weston_log("couldn't look up format 0x%lx\n",
(unsigned long) gbm_bo_get_format(bo));
goto err_free;
}
/* We can scanout an ARGB buffer if the surface's opaque region covers
* the whole output, but we have to use XRGB as the KMS format code. */
if (is_opaque)
fb->format = pixel_format_get_opaque_substitute(fb->format);
if (backend->min_width > fb->width ||
fb->width > backend->max_width ||
backend->min_height > fb->height ||
fb->height > backend->max_height) {
weston_log("bo geometry out of bounds\n");
goto err_free;
}
if (drm_fb_addfb(backend, fb) != 0) {
if (type == BUFFER_GBM_SURFACE)
weston_log("failed to create kms fb: %s\n",
strerror(errno));
goto err_free;
}
gbm_bo_set_user_data(bo, fb, drm_fb_destroy_gbm);
return fb;
err_free:
free(fb);
return NULL;
}
static void
drm_fb_set_buffer(struct drm_fb *fb, struct weston_buffer *buffer,
struct weston_buffer_release *buffer_release)
{
assert(fb->buffer_ref.buffer == NULL);
assert(fb->type == BUFFER_CLIENT || fb->type == BUFFER_DMABUF);
weston_buffer_reference(&fb->buffer_ref, buffer);
weston_buffer_release_reference(&fb->buffer_release_ref,
buffer_release);
}
static void
drm_fb_unref(struct drm_fb *fb)
{
if (!fb)
return;
assert(fb->refcnt > 0);
if (--fb->refcnt > 0)
return;
switch (fb->type) {
case BUFFER_PIXMAN_DUMB:
drm_fb_destroy_dumb(fb);
break;
case BUFFER_CURSOR:
case BUFFER_CLIENT:
gbm_bo_destroy(fb->bo);
break;
case BUFFER_GBM_SURFACE:
gbm_surface_release_buffer(fb->gbm_surface, fb->bo);
break;
case BUFFER_DMABUF:
drm_fb_destroy_dmabuf(fb);
break;
default:
assert(NULL);
break;
}
}
/**
* Allocate a new, empty, plane state.
*/
@ -773,25 +335,6 @@ drm_plane_state_put_back(struct drm_plane_state *state)
(void) drm_plane_state_alloc(state_output, plane);
}
static bool
drm_view_transform_supported(struct weston_view *ev, struct weston_output *output)
{
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
/* This will incorrectly disallow cases where the combination of
* buffer and view transformations match the output transform.
* Fixing this requires a full analysis of the transformation
* chain. */
if (ev->transform.enabled &&
ev->transform.matrix.type >= WESTON_MATRIX_TRANSFORM_ROTATE)
return false;
if (viewport->buffer.transform != output->transform)
return false;
return true;
}
/**
* Given a weston_view, fill the drm_plane_state's co-ordinates to display on
* a given plane.
@ -881,59 +424,6 @@ drm_plane_state_coords_for_view(struct drm_plane_state *state,
return true;
}
static struct drm_fb *
drm_fb_get_from_view(struct drm_output_state *state, struct weston_view *ev)
{
struct drm_output *output = state->output;
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
bool is_opaque = weston_view_is_opaque(ev, &ev->transform.boundingbox);
struct linux_dmabuf_buffer *dmabuf;
struct drm_fb *fb;
if (ev->alpha != 1.0f)
return NULL;
if (!drm_view_transform_supported(ev, &output->base))
return NULL;
if (!buffer)
return NULL;
if (wl_shm_buffer_get(buffer->resource))
return NULL;
/* GBM is used for dmabuf import as well as from client wl_buffer. */
if (!b->gbm)
return NULL;
dmabuf = linux_dmabuf_buffer_get(buffer->resource);
if (dmabuf) {
fb = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
if (!fb)
return NULL;
} else {
struct gbm_bo *bo;
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
buffer->resource, GBM_BO_USE_SCANOUT);
if (!bo)
return NULL;
fb = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
if (!fb) {
gbm_bo_destroy(bo);
return NULL;
}
}
drm_debug(b, "\t\t\t[view] view %p format: %s\n",
ev, fb->format->drm_format_name);
drm_fb_set_buffer(fb, buffer,
ev->surface->buffer_release_ref.buffer_release);
return fb;
}
/**
* Return a plane state from a drm_output_state.
*/

537
libweston/backend-drm/fb.c Normal file
View File

@ -0,0 +1,537 @@
/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2017, 2018 Collabora, Ltd.
* Copyright © 2017, 2018 General Electric Company
* Copyright (c) 2018 DisplayLink (UK) Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <gbm.h>
#include <libweston/libweston.h>
#include <libweston/backend-drm.h>
#include <libweston/pixel-formats.h>
#include <libweston/linux-dmabuf.h>
#include "shared/helpers.h"
#include "drm-internal.h"
#include "linux-dmabuf.h"
static void
drm_fb_destroy(struct drm_fb *fb)
{
if (fb->fb_id != 0)
drmModeRmFB(fb->fd, fb->fb_id);
weston_buffer_reference(&fb->buffer_ref, NULL);
weston_buffer_release_reference(&fb->buffer_release_ref, NULL);
free(fb);
}
static void
drm_fb_destroy_dumb(struct drm_fb *fb)
{
struct drm_mode_destroy_dumb destroy_arg;
assert(fb->type == BUFFER_PIXMAN_DUMB);
if (fb->map && fb->size > 0)
munmap(fb->map, fb->size);
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = fb->handles[0];
drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
drm_fb_destroy(fb);
}
static void
drm_fb_destroy_gbm(struct gbm_bo *bo, void *data)
{
struct drm_fb *fb = data;
assert(fb->type == BUFFER_GBM_SURFACE || fb->type == BUFFER_CLIENT ||
fb->type == BUFFER_CURSOR);
drm_fb_destroy(fb);
}
static int
drm_fb_addfb(struct drm_backend *b, struct drm_fb *fb)
{
int ret = -EINVAL;
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
uint64_t mods[4] = { };
size_t i;
#endif
/* If we have a modifier set, we must only use the WithModifiers
* entrypoint; we cannot import it through legacy ioctls. */
if (b->fb_modifiers && fb->modifier != DRM_FORMAT_MOD_INVALID) {
/* KMS demands that if a modifier is set, it must be the same
* for all planes. */
#ifdef HAVE_DRM_ADDFB2_MODIFIERS
for (i = 0; i < ARRAY_LENGTH(mods) && fb->handles[i]; i++)
mods[i] = fb->modifier;
ret = drmModeAddFB2WithModifiers(fb->fd, fb->width, fb->height,
fb->format->format,
fb->handles, fb->strides,
fb->offsets, mods, &fb->fb_id,
DRM_MODE_FB_MODIFIERS);
#endif
return ret;
}
ret = drmModeAddFB2(fb->fd, fb->width, fb->height, fb->format->format,
fb->handles, fb->strides, fb->offsets, &fb->fb_id,
0);
if (ret == 0)
return 0;
/* Legacy AddFB can't always infer the format from depth/bpp alone, so
* check if our format is one of the lucky ones. */
if (!fb->format->depth || !fb->format->bpp)
return ret;
/* Cannot fall back to AddFB for multi-planar formats either. */
if (fb->handles[1] || fb->handles[2] || fb->handles[3])
return ret;
ret = drmModeAddFB(fb->fd, fb->width, fb->height,
fb->format->depth, fb->format->bpp,
fb->strides[0], fb->handles[0], &fb->fb_id);
return ret;
}
struct drm_fb *
drm_fb_create_dumb(struct drm_backend *b, int width, int height,
uint32_t format)
{
struct drm_fb *fb;
int ret;
struct drm_mode_create_dumb create_arg;
struct drm_mode_destroy_dumb destroy_arg;
struct drm_mode_map_dumb map_arg;
fb = zalloc(sizeof *fb);
if (!fb)
return NULL;
fb->refcnt = 1;
fb->format = pixel_format_get_info(format);
if (!fb->format) {
weston_log("failed to look up format 0x%lx\n",
(unsigned long) format);
goto err_fb;
}
if (!fb->format->depth || !fb->format->bpp) {
weston_log("format 0x%lx is not compatible with dumb buffers\n",
(unsigned long) format);
goto err_fb;
}
memset(&create_arg, 0, sizeof create_arg);
create_arg.bpp = fb->format->bpp;
create_arg.width = width;
create_arg.height = height;
ret = drmIoctl(b->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
if (ret)
goto err_fb;
fb->type = BUFFER_PIXMAN_DUMB;
fb->modifier = DRM_FORMAT_MOD_INVALID;
fb->handles[0] = create_arg.handle;
fb->strides[0] = create_arg.pitch;
fb->num_planes = 1;
fb->size = create_arg.size;
fb->width = width;
fb->height = height;
fb->fd = b->drm.fd;
if (drm_fb_addfb(b, fb) != 0) {
weston_log("failed to create kms fb: %s\n", strerror(errno));
goto err_bo;
}
memset(&map_arg, 0, sizeof map_arg);
map_arg.handle = fb->handles[0];
ret = drmIoctl(fb->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
if (ret)
goto err_add_fb;
fb->map = mmap(NULL, fb->size, PROT_WRITE,
MAP_SHARED, b->drm.fd, map_arg.offset);
if (fb->map == MAP_FAILED)
goto err_add_fb;
return fb;
err_add_fb:
drmModeRmFB(b->drm.fd, fb->fb_id);
err_bo:
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = create_arg.handle;
drmIoctl(b->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
err_fb:
free(fb);
return NULL;
}
struct drm_fb *
drm_fb_ref(struct drm_fb *fb)
{
fb->refcnt++;
return fb;
}
static void
drm_fb_destroy_dmabuf(struct drm_fb *fb)
{
/* We deliberately do not close the GEM handles here; GBM manages
* their lifetime through the BO. */
if (fb->bo)
gbm_bo_destroy(fb->bo);
drm_fb_destroy(fb);
}
static struct drm_fb *
drm_fb_get_from_dmabuf(struct linux_dmabuf_buffer *dmabuf,
struct drm_backend *backend, bool is_opaque)
{
#ifdef HAVE_GBM_FD_IMPORT
struct drm_fb *fb;
struct gbm_import_fd_data import_legacy = {
.width = dmabuf->attributes.width,
.height = dmabuf->attributes.height,
.format = dmabuf->attributes.format,
.stride = dmabuf->attributes.stride[0],
.fd = dmabuf->attributes.fd[0],
};
struct gbm_import_fd_modifier_data import_mod = {
.width = dmabuf->attributes.width,
.height = dmabuf->attributes.height,
.format = dmabuf->attributes.format,
.num_fds = dmabuf->attributes.n_planes,
.modifier = dmabuf->attributes.modifier[0],
};
int i;
/* XXX: TODO:
*
* Currently the buffer is rejected if any dmabuf attribute
* flag is set. This keeps us from passing an inverted /
* interlaced / bottom-first buffer (or any other type that may
* be added in the future) through to an overlay. Ultimately,
* these types of buffers should be handled through buffer
* transforms and not as spot-checks requiring specific
* knowledge. */
if (dmabuf->attributes.flags)
return NULL;
fb = zalloc(sizeof *fb);
if (fb == NULL)
return NULL;
fb->refcnt = 1;
fb->type = BUFFER_DMABUF;
static_assert(ARRAY_LENGTH(import_mod.fds) ==
ARRAY_LENGTH(dmabuf->attributes.fd),
"GBM and linux_dmabuf FD size must match");
static_assert(sizeof(import_mod.fds) == sizeof(dmabuf->attributes.fd),
"GBM and linux_dmabuf FD size must match");
memcpy(import_mod.fds, dmabuf->attributes.fd, sizeof(import_mod.fds));
static_assert(ARRAY_LENGTH(import_mod.strides) ==
ARRAY_LENGTH(dmabuf->attributes.stride),
"GBM and linux_dmabuf stride size must match");
static_assert(sizeof(import_mod.strides) ==
sizeof(dmabuf->attributes.stride),
"GBM and linux_dmabuf stride size must match");
memcpy(import_mod.strides, dmabuf->attributes.stride,
sizeof(import_mod.strides));
static_assert(ARRAY_LENGTH(import_mod.offsets) ==
ARRAY_LENGTH(dmabuf->attributes.offset),
"GBM and linux_dmabuf offset size must match");
static_assert(sizeof(import_mod.offsets) ==
sizeof(dmabuf->attributes.offset),
"GBM and linux_dmabuf offset size must match");
memcpy(import_mod.offsets, dmabuf->attributes.offset,
sizeof(import_mod.offsets));
/* The legacy FD-import path does not allow us to supply modifiers,
* multiple planes, or buffer offsets. */
if (dmabuf->attributes.modifier[0] != DRM_FORMAT_MOD_INVALID ||
import_mod.num_fds > 1 ||
import_mod.offsets[0] > 0) {
fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD_MODIFIER,
&import_mod,
GBM_BO_USE_SCANOUT);
} else {
fb->bo = gbm_bo_import(backend->gbm, GBM_BO_IMPORT_FD,
&import_legacy,
GBM_BO_USE_SCANOUT);
}
if (!fb->bo)
goto err_free;
fb->width = dmabuf->attributes.width;
fb->height = dmabuf->attributes.height;
fb->modifier = dmabuf->attributes.modifier[0];
fb->size = 0;
fb->fd = backend->drm.fd;
static_assert(ARRAY_LENGTH(fb->strides) ==
ARRAY_LENGTH(dmabuf->attributes.stride),
"drm_fb and dmabuf stride size must match");
static_assert(sizeof(fb->strides) == sizeof(dmabuf->attributes.stride),
"drm_fb and dmabuf stride size must match");
memcpy(fb->strides, dmabuf->attributes.stride, sizeof(fb->strides));
static_assert(ARRAY_LENGTH(fb->offsets) ==
ARRAY_LENGTH(dmabuf->attributes.offset),
"drm_fb and dmabuf offset size must match");
static_assert(sizeof(fb->offsets) == sizeof(dmabuf->attributes.offset),
"drm_fb and dmabuf offset size must match");
memcpy(fb->offsets, dmabuf->attributes.offset, sizeof(fb->offsets));
fb->format = pixel_format_get_info(dmabuf->attributes.format);
if (!fb->format) {
weston_log("couldn't look up format info for 0x%lx\n",
(unsigned long) dmabuf->attributes.format);
goto err_free;
}
if (is_opaque)
fb->format = pixel_format_get_opaque_substitute(fb->format);
if (backend->min_width > fb->width ||
fb->width > backend->max_width ||
backend->min_height > fb->height ||
fb->height > backend->max_height) {
weston_log("bo geometry out of bounds\n");
goto err_free;
}
fb->num_planes = dmabuf->attributes.n_planes;
for (i = 0; i < dmabuf->attributes.n_planes; i++) {
union gbm_bo_handle handle;
handle = gbm_bo_get_handle_for_plane(fb->bo, i);
if (handle.s32 == -1)
goto err_free;
fb->handles[i] = handle.u32;
}
if (drm_fb_addfb(backend, fb) != 0)
goto err_free;
return fb;
err_free:
drm_fb_destroy_dmabuf(fb);
#endif
return NULL;
}
struct drm_fb *
drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend,
bool is_opaque, enum drm_fb_type type)
{
struct drm_fb *fb = gbm_bo_get_user_data(bo);
#ifdef HAVE_GBM_MODIFIERS
int i;
#endif
if (fb) {
assert(fb->type == type);
return drm_fb_ref(fb);
}
fb = zalloc(sizeof *fb);
if (fb == NULL)
return NULL;
fb->type = type;
fb->refcnt = 1;
fb->bo = bo;
fb->fd = backend->drm.fd;
fb->width = gbm_bo_get_width(bo);
fb->height = gbm_bo_get_height(bo);
fb->format = pixel_format_get_info(gbm_bo_get_format(bo));
fb->size = 0;
#ifdef HAVE_GBM_MODIFIERS
fb->modifier = gbm_bo_get_modifier(bo);
fb->num_planes = gbm_bo_get_plane_count(bo);
for (i = 0; i < fb->num_planes; i++) {
fb->strides[i] = gbm_bo_get_stride_for_plane(bo, i);
fb->handles[i] = gbm_bo_get_handle_for_plane(bo, i).u32;
fb->offsets[i] = gbm_bo_get_offset(bo, i);
}
#else
fb->num_planes = 1;
fb->strides[0] = gbm_bo_get_stride(bo);
fb->handles[0] = gbm_bo_get_handle(bo).u32;
fb->modifier = DRM_FORMAT_MOD_INVALID;
#endif
if (!fb->format) {
weston_log("couldn't look up format 0x%lx\n",
(unsigned long) gbm_bo_get_format(bo));
goto err_free;
}
/* We can scanout an ARGB buffer if the surface's opaque region covers
* the whole output, but we have to use XRGB as the KMS format code. */
if (is_opaque)
fb->format = pixel_format_get_opaque_substitute(fb->format);
if (backend->min_width > fb->width ||
fb->width > backend->max_width ||
backend->min_height > fb->height ||
fb->height > backend->max_height) {
weston_log("bo geometry out of bounds\n");
goto err_free;
}
if (drm_fb_addfb(backend, fb) != 0) {
if (type == BUFFER_GBM_SURFACE)
weston_log("failed to create kms fb: %s\n",
strerror(errno));
goto err_free;
}
gbm_bo_set_user_data(bo, fb, drm_fb_destroy_gbm);
return fb;
err_free:
free(fb);
return NULL;
}
static void
drm_fb_set_buffer(struct drm_fb *fb, struct weston_buffer *buffer,
struct weston_buffer_release *buffer_release)
{
assert(fb->buffer_ref.buffer == NULL);
assert(fb->type == BUFFER_CLIENT || fb->type == BUFFER_DMABUF);
weston_buffer_reference(&fb->buffer_ref, buffer);
weston_buffer_release_reference(&fb->buffer_release_ref,
buffer_release);
}
void
drm_fb_unref(struct drm_fb *fb)
{
if (!fb)
return;
assert(fb->refcnt > 0);
if (--fb->refcnt > 0)
return;
switch (fb->type) {
case BUFFER_PIXMAN_DUMB:
drm_fb_destroy_dumb(fb);
break;
case BUFFER_CURSOR:
case BUFFER_CLIENT:
gbm_bo_destroy(fb->bo);
break;
case BUFFER_GBM_SURFACE:
gbm_surface_release_buffer(fb->gbm_surface, fb->bo);
break;
case BUFFER_DMABUF:
drm_fb_destroy_dmabuf(fb);
break;
default:
assert(NULL);
break;
}
}
struct drm_fb *
drm_fb_get_from_view(struct drm_output_state *state, struct weston_view *ev)
{
struct drm_output *output = state->output;
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
bool is_opaque = weston_view_is_opaque(ev, &ev->transform.boundingbox);
struct linux_dmabuf_buffer *dmabuf;
struct drm_fb *fb;
if (ev->alpha != 1.0f)
return NULL;
if (!drm_view_transform_supported(ev, &output->base))
return NULL;
if (!buffer)
return NULL;
if (wl_shm_buffer_get(buffer->resource))
return NULL;
/* GBM is used for dmabuf import as well as from client wl_buffer. */
if (!b->gbm)
return NULL;
dmabuf = linux_dmabuf_buffer_get(buffer->resource);
if (dmabuf) {
fb = drm_fb_get_from_dmabuf(dmabuf, b, is_opaque);
if (!fb)
return NULL;
} else {
struct gbm_bo *bo;
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
buffer->resource, GBM_BO_USE_SCANOUT);
if (!bo)
return NULL;
fb = drm_fb_get_from_bo(bo, b, is_opaque, BUFFER_CLIENT);
if (!fb) {
gbm_bo_destroy(bo);
return NULL;
}
}
drm_debug(b, "\t\t\t[view] view %p format: %s\n",
ev, fb->format->drm_format_name);
drm_fb_set_buffer(fb, buffer,
ev->surface->buffer_release_ref.buffer_release);
return fb;
}

1
libweston/backend-drm/meson.build
View File

@ -21,6 +21,7 @@ config_h.set('BUILD_DRM_COMPOSITOR', '1')
srcs_drm = [
'drm.c',
'fb.c',
'modes.c',
'kms.c',
linux_dmabuf_unstable_v1_protocol_c,