wayland-kms.c

   1 /*
   2  * Copyright © 2013 Renesas Solutions Corp.
   3  * Copyright © 2011 Kristian Høgsberg
   4  * Copyright © 2011 Benjamin Franzke
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Takanari Hayama <taki@igel.co.jp>
  28  *
  29  * Based on wayland-drm.c by the following authors:
  30  *    Kristian Høgsberg <krh@bitplanet.net>
  31  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  32  */
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <stddef.h>
  38 #include <unistd.h>
  39 #include <errno.h>
  40
  41 #include <xf86drm.h>
  42 #include <wayland-server.h>
  43 #include "wayland-kms.h"
  44 #include "wayland-kms-auth.h"
  45 #include "wayland-kms-server-protocol.h"
  46
  47 #if defined(DEBUG)
  48 #       define WLKMS_DEBUG(s, x...) { printf(s, ##x); }
  49 #else
  50 #       define WLKMS_DEBUG(s, x...) { }
  51 #endif
  52
  53 /*
  54  * Taken from EGL/egl.h. Better to refer the egl.h
  55  * in the future.
  56  */
  57 #ifndef EGL_TEXTURE_RGBA
  58 #       define EGL_TEXTURE_RGBA         0x305E
  59 #endif
  60
  61 struct wl_kms {
  62         struct wl_display *display;
  63         int fd;                         /* FD for DRM */
  64         char *device_name;
  65
  66         struct kms_auth *auth;          /* for nested authentication */
  67 };
  68
  69 /*
  70  * wl_kms server
  71  */
  72
  73 static void destroy_buffer(struct wl_resource *resource)
  74 {
  75         struct wl_kms_buffer *buffer = resource->data;
  76         struct drm_gem_close close;
  77         int ret;
  78         if (buffer->handle) {
  79                 close.handle = buffer->handle;
  80                 ret = drmIoctl(buffer->kms->fd, DRM_IOCTL_GEM_CLOSE, &close);
  81                 if (ret)
  82                         WLKMS_DEBUG("%s: %s: DRM_IOCTL_GEM_CLOSE failed.(%s)\n",
  83                                  __FILE__, __func__, strerror(errno));
  84         }
  85
  86         free(buffer);
  87 }
  88
  89 static void
  90 buffer_destroy(struct wl_client *client, struct wl_resource *resource)
  91 {
  92         wl_resource_destroy(resource);
  93 }
  94
  95 const static struct wl_buffer_interface kms_buffer_interface = {
  96         .destroy = buffer_destroy
  97 };
  98
  99 static void
 100 kms_authenticate(struct wl_client *client, struct wl_resource *resource,
 101                  uint32_t magic)
 102 {
 103         struct wl_kms *kms = resource->data;
 104         int err;
 105
 106         WLKMS_DEBUG("%s: %s: magic=%lu\n", __FILE__, __func__, magic);
 107
 108         if (kms->auth) {
 109                 err = kms_auth_request(kms->auth, magic);
 110         } else {
 111                 err = drmAuthMagic(kms->fd, magic);
 112         }
 113
 114         if (err < 0) {
 115                 wl_resource_post_error(resource, WL_KMS_ERROR_AUTHENTICATION_FAILED,
 116                                        "authentication failed");
 117                 WLKMS_DEBUG("%s: %s: authentication failed.\n", __FILE__, __func__);
 118         } else {
 119                 wl_resource_post_event(resource, WL_KMS_AUTHENTICATED);
 120                 WLKMS_DEBUG("%s: %s: authentication succeeded.\n", __FILE__, __func__);
 121         }
 122 }
 123
 124 static void
 125 kms_create_buffer(struct wl_client *client, struct wl_resource *resource,
 126                   uint32_t id, int32_t prime_fd, int32_t width, int32_t height,
 127                   uint32_t stride, uint32_t format, uint32_t handle)
 128 {
 129         struct wl_kms *kms = resource->data;
 130         struct wl_kms_buffer *buffer;
 131         int err;
 132
 133         switch (format) {
 134         case WL_KMS_FORMAT_ARGB8888:
 135         case WL_KMS_FORMAT_XRGB8888:
 136                 break;
 137         default:
 138                 wl_resource_post_error(resource,
 139                                        WL_KMS_ERROR_INVALID_FORMAT,
 140                                        "invalid format");
 141                 return;
 142         }
 143
 144         buffer = calloc(1, sizeof *buffer);
 145         if (buffer == NULL) {
 146                 wl_resource_post_no_memory(resource);
 147                 return;
 148         }
 149
 150         buffer->kms = kms;
 151         buffer->width = width;
 152         buffer->height = height;
 153         buffer->format = format;
 154         buffer->stride = stride;
 155         buffer->fd = prime_fd;
 156
 157         WLKMS_DEBUG("%s: %s: prime_fd=%d\n", __FILE__, __func__, prime_fd);
 158 #if 0
 159         if ((err = drmPrimeFDToHandle(kms->fd, prime_fd, &buffer->handle))) {
 160                 WLKMS_DEBUG("%s: %s: drmPrimeFDToHandle() failed...%d (%s)\n", __FILE__, __func__, err, strerror(errno));
 161                 wl_resource_post_error(resource,
 162                                        WL_KMS_ERROR_INVALID_FD,
 163                                        "invalid prime FD");
 164                 return;
 165         }
 166 #else
 167         {
 168                 struct drm_gem_open op;
 169                 int ret;
 170
 171                 op.name   = prime_fd;
 172                 op.handle = 0;
 173
 174                 ret = drmIoctl(kms->fd, DRM_IOCTL_GEM_OPEN, &op);
 175                 if (ret) {
 176                         WLKMS_DEBUG("%s: %s: DRM_IOCTL_GEM_OPEN failed...(%s)\n", __FILE__, __func__, strerror(errno));
 177                         wl_resource_post_error(resource, WL_KMS_ERROR_INVALID_FD, "invalid prime FD");
 178                         return;
 179                 }
 180                 buffer->handle = op.handle;
 181         }
 182 #endif
 183
 184         // We create a wl_buffer
 185         buffer->resource = wl_resource_create(client, &wl_buffer_interface, 1, id);
 186         if (!buffer->resource) {
 187                 wl_resource_post_no_memory(resource);
 188                 free(buffer);
 189                 return;
 190         }
 191
 192         wl_resource_set_implementation(buffer->resource,
 193                                        (void (**)(void))&kms_buffer_interface,
 194                                        buffer, destroy_buffer);
 195 }
 196
 197 const static struct wl_kms_interface kms_interface = {
 198         .authenticate = kms_authenticate,
 199         .create_buffer = kms_create_buffer,
 200 };
 201
 202 static void
 203 bind_kms(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 204 {
 205         struct wl_kms *kms = data;
 206         struct wl_resource *resource;
 207         uint32_t capabilities;
 208
 209         resource = wl_resource_create(client, &wl_kms_interface, version, id);
 210         if (!resource) {
 211                 wl_client_post_no_memory(client);
 212                 return;
 213         }
 214
 215         wl_resource_set_implementation(resource, &kms_interface, data, NULL);
 216
 217         wl_resource_post_event(resource, WL_KMS_DEVICE, kms->device_name);
 218         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_ARGB8888);
 219         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_XRGB8888);
 220 }
 221
 222 struct wl_kms_buffer *wayland_kms_buffer_get(struct wl_resource *resource)
 223 {
 224         if (resource == NULL)
 225                 return NULL;
 226
 227         if (wl_resource_instance_of(resource, &wl_buffer_interface,
 228                                     &kms_buffer_interface))
 229                 return wl_resource_get_user_data(resource);
 230         else
 231                 return NULL;
 232 }
 233
 234 struct wl_kms *wayland_kms_init(struct wl_display *display,
 235                                 struct wl_display *server, char *device_name, int fd)
 236 {
 237         struct wl_kms *kms;
 238
 239         if (!(kms = calloc(1, sizeof(struct wl_kms))))
 240                 return NULL;
 241
 242         kms->display = display;
 243         kms->device_name = strdup(device_name);
 244         kms->fd = fd;
 245
 246         wl_global_create(display, &wl_kms_interface, 1, kms, bind_kms);
 247
 248         /*
 249          * we're the server in the middle. we should forward the auth
 250          * request to our server.
 251          */
 252         if (server) {
 253                 drm_magic_t magic;
 254
 255                 if (!(kms->auth = kms_auth_init(server)))
 256                         goto error;
 257
 258                 /* get a magic */
 259                 if (drmGetMagic(fd, &magic) < 0)
 260                         goto error;
 261
 262                 /* authenticate myself */
 263                 if (kms_auth_request(kms->auth, magic) < 0)
 264                         goto error;
 265         }
 266
 267         return kms;
 268
 269 error:
 270         free(kms);
 271         return NULL;
 272 }
 273
 274 void wayland_kms_uninit(struct wl_kms *kms)
 275 {
 276         free(kms->device_name);
 277
 278         /* FIXME: need wl_display_del_{object,global} */
 279
 280         free(kms);
 281 }
 282
 283 uint32_t wayland_kms_buffer_get_format(struct wl_kms_buffer *buffer)
 284 {
 285         return buffer->format;
 286 }
 287
 288 int wayland_kms_query_buffer(struct wl_kms *kms, struct wl_resource *resource,
 289                                 enum wl_kms_attribute attr, int *value)
 290 {
 291         struct wl_kms_buffer *buffer = wayland_kms_buffer_get(resource);
 292         if (!buffer)
 293                 return -1;
 294
 295         switch(attr) {
 296         case WL_KMS_WIDTH:
 297                 *value = buffer->width;
 298                 return 0;
 299
 300         case WL_KMS_HEIGHT:
 301                 *value = buffer->height;
 302                 return 0;
 303
 304         case WL_KMS_TEXTURE_FORMAT:
 305                 *value = EGL_TEXTURE_RGBA;
 306                 return 0;
 307         }
 308
 309         return -1;
 310 }