mirror of https://gitlab.freedesktop.org/mesa/mesa
375 lines
11 KiB
C
375 lines
11 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright 2018 Collabora
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*
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* Based on platform_surfaceless, which has:
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*
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* Copyright (c) 2014 The Chromium OS Authors.
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* Copyright © 2011 Intel Corporation
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_LIBDRM
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#include <xf86drm.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <dlfcn.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "egl_dri2.h"
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#include "loader.h"
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#include "util/debug.h"
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static __DRIimage*
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device_alloc_image(struct dri2_egl_display *dri2_dpy,
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struct dri2_egl_surface *dri2_surf)
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{
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return dri2_dpy->image->createImage(
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dri2_dpy->dri_screen,
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dri2_surf->base.Width,
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dri2_surf->base.Height,
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dri2_surf->visual,
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0,
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NULL);
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}
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static void
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device_free_images(struct dri2_egl_surface *dri2_surf)
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{
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struct dri2_egl_display *dri2_dpy =
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dri2_egl_display(dri2_surf->base.Resource.Display);
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if (dri2_surf->front) {
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dri2_dpy->image->destroyImage(dri2_surf->front);
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dri2_surf->front = NULL;
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}
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free(dri2_surf->swrast_device_buffer);
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dri2_surf->swrast_device_buffer = NULL;
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}
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static int
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device_image_get_buffers(__DRIdrawable *driDrawable,
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unsigned int format,
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uint32_t *stamp,
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void *loaderPrivate,
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uint32_t buffer_mask,
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struct __DRIimageList *buffers)
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{
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struct dri2_egl_surface *dri2_surf = loaderPrivate;
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struct dri2_egl_display *dri2_dpy =
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dri2_egl_display(dri2_surf->base.Resource.Display);
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buffers->image_mask = 0;
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buffers->front = NULL;
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buffers->back = NULL;
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/* The EGL 1.5 spec states that pbuffers are single-buffered. Specifically,
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* the spec states that they have a back buffer but no front buffer, in
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* contrast to pixmaps, which have a front buffer but no back buffer.
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*
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* Single-buffered surfaces with no front buffer confuse Mesa; so we deviate
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* from the spec, following the precedent of Mesa's EGL X11 platform. The
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* X11 platform correctly assigns pbuffers to single-buffered configs, but
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* assigns the pbuffer a front buffer instead of a back buffer.
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*
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* Pbuffers in the X11 platform mostly work today, so let's just copy its
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* behavior instead of trying to fix (and hence potentially breaking) the
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* world.
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*/
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if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
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if (!dri2_surf->front)
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dri2_surf->front =
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device_alloc_image(dri2_dpy, dri2_surf);
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buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
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buffers->front = dri2_surf->front;
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}
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return 1;
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}
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static _EGLSurface *
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dri2_device_create_surface(_EGLDisplay *disp, EGLint type, _EGLConfig *conf,
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const EGLint *attrib_list)
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{
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struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
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struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
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struct dri2_egl_surface *dri2_surf;
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const __DRIconfig *config;
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/* Make sure to calloc so all pointers
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* are originally NULL.
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*/
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dri2_surf = calloc(1, sizeof *dri2_surf);
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if (!dri2_surf) {
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_eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
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return NULL;
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}
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if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list,
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false, NULL))
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goto cleanup_surface;
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config = dri2_get_dri_config(dri2_conf, type,
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dri2_surf->base.GLColorspace);
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if (!config) {
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_eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
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goto cleanup_surface;
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}
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dri2_surf->visual = dri2_image_format_for_pbuffer_config(dri2_dpy, config);
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if (dri2_surf->visual == __DRI_IMAGE_FORMAT_NONE)
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goto cleanup_surface;
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if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
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goto cleanup_surface;
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return &dri2_surf->base;
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cleanup_surface:
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free(dri2_surf);
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return NULL;
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}
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static EGLBoolean
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device_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
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{
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struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
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struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
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device_free_images(dri2_surf);
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dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
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dri2_fini_surface(surf);
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free(dri2_surf);
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return EGL_TRUE;
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}
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static _EGLSurface *
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dri2_device_create_pbuffer_surface(_EGLDisplay *disp, _EGLConfig *conf,
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const EGLint *attrib_list)
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{
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return dri2_device_create_surface(disp, EGL_PBUFFER_BIT, conf, attrib_list);
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}
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static const struct dri2_egl_display_vtbl dri2_device_display_vtbl = {
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.create_pbuffer_surface = dri2_device_create_pbuffer_surface,
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.destroy_surface = device_destroy_surface,
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.create_image = dri2_create_image_khr,
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.get_dri_drawable = dri2_surface_get_dri_drawable,
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};
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static void
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device_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
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{
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}
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static const __DRIimageLoaderExtension image_loader_extension = {
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.base = { __DRI_IMAGE_LOADER, 1 },
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.getBuffers = device_image_get_buffers,
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.flushFrontBuffer = device_flush_front_buffer,
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};
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static const __DRIextension *image_loader_extensions[] = {
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&image_loader_extension.base,
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&image_lookup_extension.base,
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&use_invalidate.base,
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NULL,
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};
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static const __DRIextension *swrast_loader_extensions[] = {
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&swrast_pbuffer_loader_extension.base,
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&image_lookup_extension.base,
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&use_invalidate.base,
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NULL,
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};
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static int
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device_get_fd(_EGLDisplay *disp, _EGLDevice *dev)
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{
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#ifdef HAVE_LIBDRM
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int fd = disp->Options.fd;
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/* The fcntl() code in _eglGetDeviceDisplay() ensures that valid fd >= 3,
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* and invalid one is 0.
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*/
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if (fd) {
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/* According to the spec - if the FD does not match the EGLDevice
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* behaviour is undefined.
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*
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* Add a trivial sanity check since it doesn't cost us anything.
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*/
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if (dev != _eglAddDevice(fd, false))
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return -1;
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/* No EGL_EXT_output* extensions are supported, hence no master perms
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* are needed. Get the render one - otherwise drivers might error out.
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*/
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char *node = drmGetRenderDeviceNameFromFd(fd);
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/* Don't close the internal fd, get render node one based on it. */
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fd = loader_open_device(node);
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free(node);
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return fd;
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}
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const char *node = _eglGetDRMDeviceRenderNode(dev);
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return loader_open_device(node);
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#else
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_eglLog(_EGL_FATAL, "Driver bug: Built without libdrm, yet using a HW device");
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return -1;
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#endif
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}
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static bool
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device_probe_device(_EGLDisplay *disp)
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{
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struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
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bool request_software = env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
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if (request_software)
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_eglLog(_EGL_WARNING, "Not allowed to force software rendering when "
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"API explicitly selects a hardware device.");
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dri2_dpy->fd = device_get_fd(disp, disp->Device);
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if (dri2_dpy->fd < 0)
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return false;
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dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
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if (!dri2_dpy->driver_name)
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goto err_name;
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/* When doing software rendering, some times user still want to explicitly
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* choose the render node device since cross node import doesn't work between
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* vgem/virtio_gpu yet. It would be nice to have a new EXTENSION for this.
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* For now, just fallback to kms_swrast. */
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if (disp->Options.ForceSoftware && !request_software &&
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(strcmp(dri2_dpy->driver_name, "vgem") == 0 ||
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strcmp(dri2_dpy->driver_name, "virtio_gpu") == 0)) {
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free(dri2_dpy->driver_name);
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_eglLog(_EGL_WARNING, "NEEDS EXTENSION: falling back to kms_swrast");
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dri2_dpy->driver_name = strdup("kms_swrast");
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}
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if (!dri2_load_driver_dri3(disp))
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goto err_load;
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dri2_dpy->loader_extensions = image_loader_extensions;
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return true;
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err_load:
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free(dri2_dpy->driver_name);
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dri2_dpy->driver_name = NULL;
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err_name:
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close(dri2_dpy->fd);
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dri2_dpy->fd = -1;
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return false;
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}
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static bool
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device_probe_device_sw(_EGLDisplay *disp)
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{
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struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
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dri2_dpy->fd = -1;
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dri2_dpy->driver_name = strdup("swrast");
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if (!dri2_dpy->driver_name)
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return false;
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/* HACK: should be driver_swrast_null */
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if (!dri2_load_driver_swrast(disp)) {
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free(dri2_dpy->driver_name);
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dri2_dpy->driver_name = NULL;
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return false;
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}
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dri2_dpy->loader_extensions = swrast_loader_extensions;
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return true;
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}
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EGLBoolean
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dri2_initialize_device(_EGLDisplay *disp)
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{
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_EGLDevice *dev;
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struct dri2_egl_display *dri2_dpy;
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const char* err;
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dri2_dpy = calloc(1, sizeof *dri2_dpy);
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if (!dri2_dpy)
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return _eglError(EGL_BAD_ALLOC, "eglInitialize");
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/* Extension requires a PlatformDisplay - the EGLDevice. */
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dev = disp->PlatformDisplay;
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dri2_dpy->fd = -1;
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disp->Device = dev;
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disp->DriverData = (void *) dri2_dpy;
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err = "DRI2: failed to load driver";
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if (_eglDeviceSupports(dev, _EGL_DEVICE_DRM)) {
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if (!device_probe_device(disp))
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goto cleanup;
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} else if (_eglDeviceSupports(dev, _EGL_DEVICE_SOFTWARE)) {
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if (!device_probe_device_sw(disp))
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goto cleanup;
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} else {
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_eglLog(_EGL_FATAL, "Driver bug: exposed device is neither DRM nor SOFTWARE one");
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return EGL_FALSE;
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}
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if (!dri2_create_screen(disp)) {
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err = "DRI2: failed to create screen";
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goto cleanup;
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}
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if (!dri2_setup_extensions(disp)) {
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err = "DRI2: failed to find required DRI extensions";
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goto cleanup;
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}
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dri2_setup_screen(disp);
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if (!dri2_add_pbuffer_configs_for_visuals(disp)) {
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err = "DRI2: failed to add configs";
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goto cleanup;
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}
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/* Fill vtbl last to prevent accidentally calling virtual function during
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* initialization.
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*/
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dri2_dpy->vtbl = &dri2_device_display_vtbl;
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return EGL_TRUE;
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cleanup:
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dri2_display_destroy(disp);
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return _eglError(EGL_NOT_INITIALIZED, err);
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}
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