renderonly/renderonly.c

   1 /*
   2  * Copyright (C) 2016 Christian Gmeiner <christian.gmeiner@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Christian Gmeiner <christian.gmeiner@gmail.com>
  25  */
  26
  27 #include "renderonly/renderonly.h"
  28
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <stdio.h>
  32 #include <sys/ioctl.h>
  33 #include <xf86drm.h>
  34
  35 #include "state_tracker/drm_driver.h"
  36 #include "pipe/p_screen.h"
  37 #include "util/u_memory.h"
  38
  39 struct renderonly *
  40 renderonly_dup(const struct renderonly *ro)
  41 {
  42    struct renderonly *copy;
  43
  44    copy = CALLOC_STRUCT(renderonly);
  45    if (!copy)
  46       return NULL;
  47
  48    memcpy(copy, ro, sizeof(*ro));
  49
  50    return copy;
  51 }
  52
  53 struct renderonly_scanout *
  54 renderonly_scanout_for_prime(struct pipe_resource *rsc, struct renderonly *ro)
  55 {
  56    struct renderonly_scanout *scanout;
  57
  58    scanout = CALLOC_STRUCT(renderonly_scanout);
  59    if (!scanout)
  60       return NULL;
  61
  62    scanout->prime = rsc;
  63
  64    return scanout;
  65 }
  66
  67 void
  68 renderonly_scanout_destroy(struct renderonly_scanout *scanout)
  69 {
  70    FREE(scanout);
  71 }
  72
  73 struct renderonly_scanout *
  74 renderonly_create_kms_dumb_buffer_for_resource(struct pipe_resource *rsc,
  75                                                struct renderonly *ro)
  76 {
  77    struct pipe_screen *screen = rsc->screen;
  78    struct renderonly_scanout *scanout;
  79    struct winsys_handle handle;
  80    int prime_fd, err;
  81    struct drm_mode_create_dumb create_dumb = {
  82       .width = rsc->width0,
  83       .height = rsc->height0,
  84       .bpp = 32,
  85    };
  86    struct drm_mode_destroy_dumb destroy_dumb = { };
  87
  88    scanout = CALLOC_STRUCT(renderonly_scanout);
  89    if (!scanout)
  90       return NULL;
  91
  92    /* create dumb buffer at scanout GPU */
  93    err = ioctl(ro->kms_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
  94    if (err < 0) {
  95       fprintf(stderr, "DRM_IOCTL_MODE_CREATE_DUMB failed: %s\n",
  96             strerror(errno));
  97       goto free_scanout;
  98    }
  99
 100    scanout->handle = create_dumb.handle;
 101    scanout->stride = create_dumb.pitch;
 102
 103    /* export dumb buffer */
 104    err = drmPrimeHandleToFD(ro->kms_fd, create_dumb.handle, O_CLOEXEC,
 105          &prime_fd);
 106    if (err < 0) {
 107       fprintf(stderr, "failed to export dumb buffer: %s\n", strerror(errno));
 108       goto free_dumb;
 109    }
 110
 111    /* import dumb buffer */
 112    handle.type = DRM_API_HANDLE_TYPE_FD;
 113    handle.handle = prime_fd;
 114    handle.stride = create_dumb.pitch;
 115
 116    scanout->prime = screen->resource_from_handle(screen, rsc,
 117          &handle, PIPE_HANDLE_USAGE_READ_WRITE);
 118
 119    if (!scanout->prime) {
 120       fprintf(stderr, "failed to create resource_from_handle: %s\n", strerror(errno));
 121       goto free_dumb;
 122    }
 123
 124    return scanout;
 125
 126 free_dumb:
 127    destroy_dumb.handle = scanout->handle;
 128    ioctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
 129
 130 free_scanout:
 131    FREE(scanout);
 132
 133    return NULL;
 134 }
 135
 136 struct renderonly_scanout *
 137 renderonly_create_gpu_import_for_resource(struct pipe_resource *rsc,
 138                                           struct renderonly *ro)
 139 {
 140    struct pipe_screen *screen = rsc->screen;
 141    struct renderonly_scanout *scanout;
 142    boolean status;
 143    int fd, err;
 144    struct winsys_handle handle = {
 145       .type = DRM_API_HANDLE_TYPE_FD
 146    };
 147
 148    scanout = CALLOC_STRUCT(renderonly_scanout);
 149    if (!scanout)
 150       return NULL;
 151
 152    status = screen->resource_get_handle(screen, NULL, rsc, &handle,
 153          PIPE_HANDLE_USAGE_READ_WRITE);
 154    if (!status)
 155       goto free_scanout;
 156
 157    scanout->stride = handle.stride;
 158    fd = handle.handle;
 159
 160    err = drmPrimeFDToHandle(ro->kms_fd, fd, &scanout->handle);
 161    close(fd);
 162
 163    if (err < 0) {
 164       fprintf(stderr, "drmPrimeFDToHandle() failed: %s\n", strerror(errno));
 165       goto free_scanout;
 166    }
 167
 168    return scanout;
 169
 170 free_scanout:
 171    FREE(scanout);
 172
 173    return NULL;
 174 }
 175