From: Giovanni Campagna <gcampa...@src.gnome.org>
Turn GBM into a swrast loader (providing putimage/getimage backed
by a dumb KMS buffer). This allows to run KMS+DRM GL applications
(such as weston or mutter-wayland) unmodified on cards that don't
have any client side HW acceleration component but that can do
modeset (examples include simpledrm and qxl)
---
src/egl/drivers/dri2/platform_drm.c | 162 +++++++++++++++++++++++++----
src/gbm/backends/dri/gbm_dri.c | 202 +++++++++++++++++++++++++++++++-----
src/gbm/backends/dri/gbm_driint.h | 35 ++++++-
src/gbm/main/gbm.h | 3 +
4 files changed, 354 insertions(+), 48 deletions(-)
diff --git a/src/egl/drivers/dri2/platform_drm.c
b/src/egl/drivers/dri2/platform_drm.c
index 6227bc9..6a0dcd3 100644
--- a/src/egl/drivers/dri2/platform_drm.c
+++ b/src/egl/drivers/dri2/platform_drm.c
@@ -44,6 +44,7 @@ lock_front_buffer(struct gbm_surface *_surf)
{
struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
struct dri2_egl_surface *dri2_surf = surf->dri_private;
+ struct gbm_dri_device *device = (struct gbm_dri_device *) _surf->gbm;
struct gbm_bo *bo;
if (dri2_surf->current == NULL) {
@@ -52,8 +53,11 @@ lock_front_buffer(struct gbm_surface *_surf)
}
bo = dri2_surf->current->bo;
- dri2_surf->current->locked = 1;
- dri2_surf->current = NULL;
+
+ if (device->dri2) {
+ dri2_surf->current->locked = 1;
+ dri2_surf->current = NULL;
+ }
return bo;
}
@@ -122,14 +126,27 @@ dri2_drm_create_surface(_EGLDriver *drv, _EGLDisplay
*disp, EGLint type,
goto cleanup_surf;
}
- dri2_surf->dri_drawable =
- (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
- dri2_conf->dri_double_config,
- dri2_surf->gbm_surf);
+ if (dri2_dpy->dri2) {
+ dri2_surf->dri_drawable =
+ (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
+ dri2_conf->dri_double_config,
+ dri2_surf->gbm_surf);
- if (dri2_surf->dri_drawable == NULL) {
- _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
- goto cleanup_surf;
+ if (dri2_surf->dri_drawable == NULL) {
+ _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
+ goto cleanup_surf;
+ }
+ } else {
+ assert (dri2_dpy->swrast != NULL);
+ dri2_surf->dri_drawable =
+ (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
+ dri2_conf->dri_double_config,
+ dri2_surf->gbm_surf);
+
+ if (dri2_surf->dri_drawable == NULL) {
+ _eglError(EGL_BAD_ALLOC, "swrast->createNewDrawable");
+ goto cleanup_surf;
+ }
}
return &dri2_surf->base;
@@ -221,6 +238,28 @@ get_back_bo(struct dri2_egl_surface *dri2_surf)
return 0;
}
+static int
+get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
+{
+ struct dri2_egl_display *dri2_dpy =
+ dri2_egl_display(dri2_surf->base.Resource.Display);
+ struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
+
+ if (dri2_surf->current == NULL) {
+ assert (!dri2_surf->color_buffers[0].locked);
+ dri2_surf->current = &dri2_surf->color_buffers[0];
+ }
+
+ if (dri2_surf->current->bo == NULL)
+ dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
+ surf->base.width,
surf->base.height,
+ surf->base.format,
surf->base.flags);
+ if (dri2_surf->current->bo == NULL)
+ return -1;
+
+ return 0;
+}
+
static void
back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
{
@@ -374,19 +413,23 @@ dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp,
_EGLSurface *draw)
struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
int i;
- if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
- if (dri2_surf->current)
- _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
- for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
- if (dri2_surf->color_buffers[i].age > 0)
- dri2_surf->color_buffers[i].age++;
- dri2_surf->current = dri2_surf->back;
- dri2_surf->current->age = 1;
- dri2_surf->back = NULL;
- }
+ if (dri2_dpy->swrast) {
+ (*dri2_dpy->core->swapBuffers)(dri2_surf->dri_drawable);
+ } else {
+ if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
+ if (dri2_surf->current)
+ _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
+ for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
+ if (dri2_surf->color_buffers[i].age > 0)
+ dri2_surf->color_buffers[i].age++;
+ dri2_surf->current = dri2_surf->back;
+ dri2_surf->current->age = 1;
+ dri2_surf->back = NULL;
+ }
- (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
- (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
+ (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+ (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
+ }
return EGL_TRUE;
}
@@ -457,6 +500,74 @@ dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
return drmAuthMagic(dri2_dpy->fd, id);
}
+static void
+swrast_put_image2(__DRIdrawable *driDrawable,
+ int op,
+ int x,
+ int y,
+ int width,
+ int height,
+ int stride,
+ char *data,
+ void *loaderPrivate)
+{
+ struct dri2_egl_surface *dri2_surf = loaderPrivate;
+ int internal_stride, i;
+ struct gbm_dri_bo *bo;
+
+ if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
+ op != __DRI_SWRAST_IMAGE_OP_SWAP)
+ return;
+
+ if (get_swrast_front_bo(dri2_surf) < 0)
+ return;
+ bo = gbm_dri_bo(dri2_surf->current->bo);
+ if (bo == NULL)
+ return;
+ if (gbm_dri_bo_map(bo) == NULL)
+ return;
+
+ internal_stride = bo->base.base.stride;
+
+ for (i = 0; i < height; i++) {
+ memcpy(bo->map + (x + i) * internal_stride + y,
+ data + i * stride, stride);
+ }
+
+ gbm_dri_bo_unmap(bo);
+}
+
+static void
+swrast_get_image(__DRIdrawable *driDrawable,
+ int x,
+ int y,
+ int width,
+ int height,
+ char *data,
+ void *loaderPrivate)
+{
+ struct dri2_egl_surface *dri2_surf = loaderPrivate;
+ int internal_stride, stride, i;
+ struct gbm_dri_bo *bo;
+
+ get_swrast_front_bo(dri2_surf);
+ bo = gbm_dri_bo(dri2_surf->current->bo);
+ if (bo == NULL)
+ return;
+ if (gbm_dri_bo_map(bo) == NULL)
+ return;
+
+ internal_stride = bo->base.base.stride;
+ stride = width * 4;
+
+ for (i = 0; i < height; i++) {
+ memcpy(data + i * stride,
+ bo->map + (x + i) * internal_stride + y, stride);
+ }
+
+ gbm_dri_bo_unmap(bo);
+}
+
static struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
.authenticate = dri2_drm_authenticate,
.create_window_surface = dri2_drm_create_window_surface,
@@ -533,6 +644,7 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
dri2_dpy->image = dri2_dpy->gbm_dri->image;
dri2_dpy->flush = dri2_dpy->gbm_dri->flush;
+ dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
@@ -542,6 +654,8 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
dri2_dpy->gbm_dri->get_buffers_with_format =
dri2_drm_get_buffers_with_format;
dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
+ dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
+ dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
dri2_dpy->gbm_dri->base.base.surface_lock_front_buffer = lock_front_buffer;
dri2_dpy->gbm_dri->base.base.surface_release_buffer = release_buffer;
@@ -572,10 +686,12 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
i + 1, EGL_WINDOW_BIT, attr_list, NULL);
}
- disp->Extensions.EXT_buffer_age = EGL_TRUE;
+ if (dri2_dpy->dri2)
+ disp->Extensions.EXT_buffer_age = EGL_TRUE;
#ifdef HAVE_WAYLAND_PLATFORM
- disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
+ if (dri2_dpy->image)
+ disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
#endif
/* we're supporting EGL 1.4 */
diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index 347bc99..8896a37 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -124,6 +124,74 @@ image_get_buffers(__DRIdrawable *driDrawable,
surf->dri_private, buffer_mask, buffers);
}
+static void
+swrast_get_drawable_info(__DRIdrawable *driDrawable,
+ int *x,
+ int *y,
+ int *width,
+ int *height,
+ void *loaderPrivate)
+{
+ struct gbm_dri_surface *surf = loaderPrivate;
+
+ *x = 0;
+ *y = 0;
+ *width = surf->base.width;
+ *height = surf->base.height;
+}
+
+static void
+swrast_put_image2(__DRIdrawable *driDrawable,
+ int op,
+ int x,
+ int y,
+ int width,
+ int height,
+ int stride,
+ char *data,
+ void *loaderPrivate)
+{
+ struct gbm_dri_surface *surf = loaderPrivate;
+ struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
+
+ dri->swrast_put_image2(driDrawable,
+ op, x, y,
+ width, height, stride,
+ data, surf->dri_private);
+}
+
+static void
+swrast_put_image(__DRIdrawable *driDrawable,
+ int op,
+ int x,
+ int y,
+ int width,
+ int height,
+ char *data,
+ void *loaderPrivate)
+{
+ return swrast_put_image2(driDrawable, op, x, y, width, height,
+ width * 4, data, loaderPrivate);
+}
+
+static void
+swrast_get_image(__DRIdrawable *driDrawable,
+ int x,
+ int y,
+ int width,
+ int height,
+ char *data,
+ void *loaderPrivate)
+{
+ struct gbm_dri_surface *surf = loaderPrivate;
+ struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
+
+ dri->swrast_get_image(driDrawable,
+ x, y,
+ width, height,
+ data, surf->dri_private);
+}
+
static const __DRIuseInvalidateExtension use_invalidate = {
.base = { __DRI_USE_INVALIDATE, 1 }
};
@@ -149,11 +217,21 @@ static const __DRIimageLoaderExtension
image_loader_extension = {
.flushFrontBuffer = dri_flush_front_buffer,
};
+static const __DRIswrastLoaderExtension swrast_loader_extension = {
+ .base = { __DRI_SWRAST_LOADER, 2 },
+
+ .getDrawableInfo = swrast_get_drawable_info,
+ .putImage = swrast_put_image,
+ .getImage = swrast_get_image,
+ .putImage2 = swrast_put_image2
+};
+
static const __DRIextension *gbm_dri_screen_extensions[] = {
&image_lookup_extension.base,
&use_invalidate.base,
&dri2_loader_extension.base,
&image_loader_extension.base,
+ &swrast_loader_extension.base,
NULL,
};
@@ -175,6 +253,12 @@ static struct dri_extension_match
gbm_dri_device_extensions[] = {
{ NULL, 0, 0 }
};
+static struct dri_extension_match gbm_swrast_device_extensions[] = {
+ { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core), },
+ { __DRI_SWRAST, 1, offsetof(struct gbm_dri_device, swrast) },
+ { NULL, 0, 0 }
+};
+
static int
dri_bind_extensions(struct gbm_dri_device *dri,
struct dri_extension_match *matches,
@@ -269,9 +353,11 @@ dri_load_driver(struct gbm_dri_device *dri)
dri->driver_extensions = extensions;
if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
- dlclose(dri->driver);
- fprintf(stderr, "failed to bind extensions\n");
- return -1;
+ if (dri_bind_extensions(dri, gbm_swrast_device_extensions, extensions) <
0) {
+ dlclose(dri->driver);
+ fprintf(stderr, "failed to bind extensions\n");
+ return -1;
+ }
}
return 0;
@@ -329,6 +415,39 @@ free_screen:
}
static int
+dri_screen_create_swrast(struct gbm_dri_device *dri)
+{
+ int ret = 0;
+
+ dri->base.driver_name = "swrast";
+
+ ret = dri_load_driver(dri);
+ if (ret) {
+ fprintf(stderr, "failed to load swrast driver\n");
+ return ret;
+ }
+
+ dri->extensions = gbm_dri_screen_extensions;
+
+ if (dri->swrast == NULL)
+ return -1;
+
+ if (dri->swrast->base.version >= 4) {
+ dri->screen = dri->swrast->createNewScreen2(0, dri->extensions,
+ dri->driver_extensions,
+ &dri->driver_configs, dri);
+ } else {
+ dri->screen = dri->swrast->createNewScreen(0, dri->extensions,
+ &dri->driver_configs, dri);
+ }
+
+ dri->lookup_image = NULL;
+ dri->lookup_user_data = NULL;
+
+ return 0;
+}
+
+static int
gbm_dri_is_format_supported(struct gbm_device *gbm,
uint32_t format,
uint32_t usage)
@@ -393,7 +512,7 @@ gbm_dri_bo_destroy(struct gbm_bo *_bo)
if (bo->image != NULL) {
dri->image->destroyImage(bo->image);
} else {
- munmap(bo->map, bo->size);
+ gbm_dri_bo_unmap(bo);
memset(&arg, 0, sizeof(arg));
arg.handle = bo->handle;
drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
@@ -439,7 +558,7 @@ gbm_dri_bo_import(struct gbm_device *gbm,
int gbm_format;
/* Required for query image WIDTH & HEIGHT */
- if (dri->image->base.version < 4) {
+ if (dri->image == NULL || dri->image->base.version < 4) {
errno = ENOSYS;
return NULL;
}
@@ -563,16 +682,16 @@ create_dumb(struct gbm_device *gbm,
{
struct gbm_dri_device *dri = gbm_dri_device(gbm);
struct drm_mode_create_dumb create_arg;
- struct drm_mode_map_dumb map_arg;
struct gbm_dri_bo *bo;
struct drm_mode_destroy_dumb destroy_arg;
int ret;
+ int is_cursor, is_scanout;
- if (!(usage & GBM_BO_USE_CURSOR)) {
- errno = EINVAL;
- return NULL;
- }
- if (format != GBM_FORMAT_ARGB8888) {
+ is_cursor = (usage & GBM_BO_USE_CURSOR) != 0 &&
+ format == GBM_FORMAT_ARGB8888;
+ is_scanout = (usage & GBM_BO_USE_SCANOUT) != 0 &&
+ format == GBM_FORMAT_XRGB8888;
+ if (!is_cursor && !is_scanout) {
errno = EINVAL;
return NULL;
}
@@ -598,16 +717,7 @@ create_dumb(struct gbm_device *gbm,
bo->handle = create_arg.handle;
bo->size = create_arg.size;
- memset(&map_arg, 0, sizeof(map_arg));
- map_arg.handle = bo->handle;
-
- ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
- if (ret)
- goto destroy_dumb;
-
- bo->map = mmap(0, bo->size, PROT_WRITE,
- MAP_SHARED, dri->base.base.fd, map_arg.offset);
- if (bo->map == MAP_FAILED)
+ if (gbm_dri_bo_map(bo) == NULL)
goto destroy_dumb;
return &bo->base.base;
@@ -622,6 +732,40 @@ free_bo:
return NULL;
}
+static void *
+gbm_dri_real_bo_map(struct gbm_dri_bo *bo)
+{
+ struct drm_mode_map_dumb map_arg;
+ int ret;
+
+ if (bo->image != NULL)
+ return NULL;
+
+ if (bo->map != NULL)
+ return bo->map;
+
+ memset(&map_arg, 0, sizeof(map_arg));
+ map_arg.handle = bo->handle;
+
+ ret = drmIoctl(bo->base.base.gbm->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
+ if (ret)
+ return NULL;
+
+ bo->map = mmap(0, bo->size, PROT_WRITE,
+ MAP_SHARED, bo->base.base.gbm->fd, map_arg.offset);
+ if (bo->map == MAP_FAILED)
+ return NULL;
+
+ return bo->map;
+}
+
+static void
+gbm_dri_real_bo_unmap(struct gbm_dri_bo *bo)
+{
+ munmap(bo->map, bo->size);
+ bo->map = NULL;
+}
+
static struct gbm_bo *
gbm_dri_bo_create(struct gbm_device *gbm,
uint32_t width, uint32_t height,
@@ -632,7 +776,7 @@ gbm_dri_bo_create(struct gbm_device *gbm,
int dri_format;
unsigned dri_use = 0;
- if (usage & GBM_BO_USE_WRITE)
+ if (usage & GBM_BO_USE_WRITE || dri->image == NULL)
return create_dumb(gbm, width, height, format, usage);
bo = calloc(1, sizeof *bo);
@@ -743,7 +887,7 @@ static struct gbm_device *
dri_device_create(int fd)
{
struct gbm_dri_device *dri;
- int ret;
+ int ret, force_sw;
dri = calloc(1, sizeof *dri);
if (!dri)
@@ -756,6 +900,8 @@ dri_device_create(int fd)
dri->base.base.bo_write = gbm_dri_bo_write;
dri->base.base.bo_get_fd = gbm_dri_bo_get_fd;
dri->base.base.bo_destroy = gbm_dri_bo_destroy;
+ dri->bo_map = gbm_dri_real_bo_map;
+ dri->bo_unmap = gbm_dri_real_bo_unmap;
dri->base.base.destroy = dri_destroy;
dri->base.base.surface_create = gbm_dri_surface_create;
dri->base.base.surface_destroy = gbm_dri_surface_destroy;
@@ -763,7 +909,15 @@ dri_device_create(int fd)
dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
dri->base.base.name = "drm";
- ret = dri_screen_create(dri);
+ force_sw = getenv("LIBGL_ALWAYS_SOFTWARE") != NULL;
+ if (!force_sw) {
+ ret = dri_screen_create(dri);
+ if (!ret)
+ ret = dri_screen_create_swrast(dri);
+ } else {
+ ret = dri_screen_create_swrast(dri);
+ }
+
if (ret)
goto err_dri;
diff --git a/src/gbm/backends/dri/gbm_driint.h
b/src/gbm/backends/dri/gbm_driint.h
index 9c4392d..b163ad6 100644
--- a/src/gbm/backends/dri/gbm_driint.h
+++ b/src/gbm/backends/dri/gbm_driint.h
@@ -36,6 +36,7 @@
#include "GL/internal/dri_interface.h"
struct gbm_dri_surface;
+struct gbm_dri_bo;
struct gbm_dri_device {
struct gbm_drm_device base;
@@ -47,6 +48,7 @@ struct gbm_dri_device {
const __DRIcoreExtension *core;
const __DRIdri2Extension *dri2;
const __DRIimageExtension *image;
+ const __DRIswrastExtension *swrast;
const __DRI2flushExtension *flush;
const __DRIdri2LoaderExtension *loader;
@@ -54,6 +56,9 @@ struct gbm_dri_device {
const __DRIextension **extensions;
const __DRIextension **driver_extensions;
+ void *(*bo_map) (struct gbm_dri_bo *bo);
+ void (*bo_unmap) (struct gbm_dri_bo *bo);
+
__DRIimage *(*lookup_image)(__DRIscreen *screen, void *image, void *data);
void *lookup_user_data;
@@ -72,6 +77,22 @@ struct gbm_dri_device {
void *loaderPrivate,
uint32_t buffer_mask,
struct __DRIimageList *buffers);
+ void (*swrast_put_image2)(__DRIdrawable *driDrawable,
+ int op,
+ int x,
+ int y,
+ int width,
+ int height,
+ int stride,
+ char *data,
+ void *loaderPrivate);
+ void (*swrast_get_image)(__DRIdrawable *driDrawable,
+ int x,
+ int y,
+ int width,
+ int height,
+ char *data,
+ void *loaderPrivate);
struct wl_drm *wl_drm;
};
@@ -81,7 +102,7 @@ struct gbm_dri_bo {
__DRIimage *image;
- /* Only used for cursors */
+ /* Used for cursors and the swrast front BO */
uint32_t handle, size;
void *map;
};
@@ -110,4 +131,16 @@ gbm_dri_surface(struct gbm_surface *surface)
return (struct gbm_dri_surface *) surface;
}
+static inline void *
+gbm_dri_bo_map(struct gbm_dri_bo *bo)
+{
+ return gbm_dri_device(bo->base.base.gbm)->bo_map(bo);
+}
+
+static inline void
+gbm_dri_bo_unmap(struct gbm_dri_bo *bo)
+{
+ return gbm_dri_device(bo->base.base.gbm)->bo_unmap(bo);
+}
+
#endif
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
index 374cef8..7b23c26 100644
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -287,6 +287,9 @@ gbm_surface_create(struct gbm_device *gbm,
uint32_t width, uint32_t height,
uint32_t format, uint32_t flags);
+int
+gbm_surface_needs_lock_front_buffer(struct gbm_surface *surface);
+
struct gbm_bo *
gbm_surface_lock_front_buffer(struct gbm_surface *surface);
--
1.9.3
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