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
  79         if (buffer->handle) {
  80                 close.handle = buffer->handle;
  81                 ret = drmIoctl(buffer->kms->fd, DRM_IOCTL_GEM_CLOSE, &close);
  82                 if (ret)
  83                         WLKMS_DEBUG("%s: %s: DRM_IOCTL_GEM_CLOSE failed.(%s)\n",
  84                                  __FILE__, __func__, strerror(errno));
  85         }
  86
  87         free(buffer);
  88 }
  89
  90 static void
  91 buffer_destroy(struct wl_client *client, struct wl_resource *resource)
  92 {
  93         wl_resource_destroy(resource);
  94 }
  95
  96 const static struct wl_buffer_interface kms_buffer_interface = {
  97         .destroy = buffer_destroy
  98 };
  99
 100 static void
 101 kms_authenticate(struct wl_client *client, struct wl_resource *resource,
 102                  uint32_t magic)
 103 {
 104         struct wl_kms *kms = resource->data;
 105         int err;
 106
 107         WLKMS_DEBUG("%s: %s: magic=%lu\n", __FILE__, __func__, magic);
 108
 109         if (kms->auth) {
 110                 err = kms_auth_request(kms->auth, magic);
 111         } else {
 112                 err = drmAuthMagic(kms->fd, magic);
 113         }
 114
 115         if (err < 0) {
 116                 wl_resource_post_error(resource, WL_KMS_ERROR_AUTHENTICATION_FAILED,
 117                                        "authentication failed");
 118                 WLKMS_DEBUG("%s: %s: authentication failed.\n", __FILE__, __func__);
 119         } else {
 120                 wl_resource_post_event(resource, WL_KMS_AUTHENTICATED);
 121                 WLKMS_DEBUG("%s: %s: authentication succeeded.\n", __FILE__, __func__);
 122         }
 123 }
 124
 125 static void
 126 kms_create_mp_buffer(struct wl_client *client, struct wl_resource *resource,
 127                      uint32_t id, int32_t width, int32_t height, uint32_t format,
 128                      int32_t fd0, uint32_t stride0, int32_t fd1, uint32_t stride1,
 129                      int32_t fd2, uint32_t stride2)
 130 {
 131         struct wl_kms *kms = resource->data;
 132         struct wl_kms_buffer *buffer;
 133         int err, nplanes;
 134
 135         switch (format) {
 136         case WL_KMS_FORMAT_ARGB8888:
 137         case WL_KMS_FORMAT_XRGB8888:
 138         case WL_KMS_FORMAT_ABGR8888:
 139         case WL_KMS_FORMAT_XBGR8888:
 140         case WL_KMS_FORMAT_RGB888:
 141         case WL_KMS_FORMAT_BGR888:
 142         case WL_KMS_FORMAT_YUYV:
 143         case WL_KMS_FORMAT_UYVY:
 144         case WL_KMS_FORMAT_RGB565:
 145         case WL_KMS_FORMAT_BGR565:
 146                 nplanes = 1;
 147                 break;
 148
 149         case WL_KMS_FORMAT_NV12:
 150         case WL_KMS_FORMAT_NV21:
 151         case WL_KMS_FORMAT_NV16:
 152         case WL_KMS_FORMAT_NV61:
 153                 nplanes = 2;
 154                 break;
 155
 156         default:
 157                 wl_resource_post_error(resource,
 158                                        WL_KMS_ERROR_INVALID_FORMAT,
 159                                        "invalid format");
 160                 return;
 161         }
 162
 163         buffer = calloc(1, sizeof *buffer);
 164         if (buffer == NULL) {
 165                 wl_resource_post_no_memory(resource);
 166                 return;
 167         }
 168
 169         buffer->kms = kms;
 170         buffer->width = width;
 171         buffer->height = height;
 172         buffer->format = format;
 173         buffer->num_planes = nplanes;
 174         buffer->stride = buffer->planes[0].stride = stride0;
 175         buffer->fd = buffer->planes[0].fd = fd0;
 176
 177         if (nplanes > 1) {
 178                 buffer->planes[1].stride = stride1;
 179                 buffer->planes[1].fd = fd1;
 180         }
 181
 182         if (nplanes > 2) {
 183                 buffer->planes[2].stride = stride2;
 184                 buffer->planes[2].fd = fd2;
 185         }
 186
 187         WLKMS_DEBUG("%s: %s: %d planes (%d, %d, %d)\n", __FILE__, __func__, nplanes, fd0, fd1, fd2);
 188
 189         // XXX: Do we need to support multiplaner KMS BO?
 190         if ((nplanes == 1) && (err = drmPrimeFDToHandle(kms->fd, fd0, &buffer->handle))) {
 191                 WLKMS_DEBUG("%s: %s: drmPrimeFDToHandle() failed...%d (%s)\n", __FILE__, __func__, err, strerror(errno));
 192                 wl_resource_post_error(resource,
 193                                        WL_KMS_ERROR_INVALID_FD,
 194                                        "invalid prime FD");
 195                 return;
 196         }
 197
 198         // We create a wl_buffer
 199         buffer->resource = wl_resource_create(client, &wl_buffer_interface, 1, id);
 200         if (!buffer->resource) {
 201                 wl_resource_post_no_memory(resource);
 202                 free(buffer);
 203                 return;
 204         }
 205
 206         wl_resource_set_implementation(buffer->resource,
 207                                        (void (**)(void))&kms_buffer_interface,
 208                                        buffer, destroy_buffer);
 209 }
 210
 211
 212 static void
 213 kms_create_buffer(struct wl_client *client, struct wl_resource *resource,
 214                   uint32_t id, int32_t prime_fd, int32_t width, int32_t height,
 215                   uint32_t stride, uint32_t format, uint32_t handle)
 216 {
 217         kms_create_mp_buffer(client, resource, id, width, height, format, prime_fd, stride,
 218                              0, 0, 0, 0);
 219 }
 220
 221 const static struct wl_kms_interface kms_interface = {
 222         .authenticate = kms_authenticate,
 223         .create_buffer = kms_create_buffer,
 224         .create_mp_buffer = kms_create_mp_buffer,
 225 };
 226
 227 static void
 228 bind_kms(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 229 {
 230         struct wl_kms *kms = data;
 231         struct wl_resource *resource;
 232         uint32_t capabilities;
 233
 234         resource = wl_resource_create(client, &wl_kms_interface, version, id);
 235         if (!resource) {
 236                 wl_client_post_no_memory(client);
 237                 return;
 238         }
 239
 240         wl_resource_set_implementation(resource, &kms_interface, data, NULL);
 241
 242         wl_resource_post_event(resource, WL_KMS_DEVICE, kms->device_name);
 243         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_ARGB8888);
 244         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_XRGB8888);
 245 }
 246
 247 int wayland_kms_fd_get(struct wl_kms* kms)
 248 {
 249         return kms->fd;
 250 }
 251
 252 struct wl_kms_buffer *wayland_kms_buffer_get(struct wl_resource *resource)
 253 {
 254         if (resource == NULL)
 255                 return NULL;
 256
 257         if (wl_resource_instance_of(resource, &wl_buffer_interface,
 258                                     &kms_buffer_interface))
 259                 return wl_resource_get_user_data(resource);
 260         else
 261                 return NULL;
 262 }
 263
 264 struct wl_kms *wayland_kms_init(struct wl_display *display,
 265                                 struct wl_display *server, char *device_name, int fd)
 266 {
 267         struct wl_kms *kms;
 268
 269         if (!(kms = calloc(1, sizeof(struct wl_kms))))
 270                 return NULL;
 271
 272         kms->display = display;
 273         kms->device_name = strdup(device_name);
 274         kms->fd = fd;
 275
 276         wl_global_create(display, &wl_kms_interface, 2, kms, bind_kms);
 277
 278         /*
 279          * we're the server in the middle. we should forward the auth
 280          * request to our server.
 281          */
 282         if (server) {
 283                 drm_magic_t magic;
 284
 285                 if (!(kms->auth = kms_auth_init(server)))
 286                         goto error;
 287
 288                 /* get a magic */
 289                 if (drmGetMagic(fd, &magic) < 0)
 290                         goto error;
 291
 292                 /* authenticate myself */
 293                 if (kms_auth_request(kms->auth, magic) < 0)
 294                         goto error;
 295         }
 296
 297         return kms;
 298
 299 error:
 300         free(kms);
 301         return NULL;
 302 }
 303
 304 void wayland_kms_uninit(struct wl_kms *kms)
 305 {
 306         free(kms->device_name);
 307
 308         /* FIXME: need wl_display_del_{object,global} */
 309
 310         free(kms);
 311 }
 312
 313 uint32_t wayland_kms_buffer_get_format(struct wl_kms_buffer *buffer)
 314 {
 315         return buffer->format;
 316 }
 317
 318 int wayland_kms_query_buffer(struct wl_kms *kms, struct wl_resource *resource,
 319                                 enum wl_kms_attribute attr, int *value)
 320 {
 321         struct wl_kms_buffer *buffer = wayland_kms_buffer_get(resource);
 322         if (!buffer)
 323                 return -1;
 324
 325         switch(attr) {
 326         case WL_KMS_WIDTH:
 327                 *value = buffer->width;
 328                 return 0;
 329
 330         case WL_KMS_HEIGHT:
 331                 *value = buffer->height;
 332                 return 0;
 333
 334         case WL_KMS_TEXTURE_FORMAT:
 335                 *value = EGL_TEXTURE_RGBA;
 336                 return 0;
 337         }
 338
 339         return -1;
 340 }