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_buffer(struct wl_client *client, struct wl_resource *resource,
 127                   uint32_t id, int32_t prime_fd, int32_t width, int32_t height,
 128                   uint32_t stride, uint32_t format, uint32_t handle)
 129 {
 130         struct wl_kms *kms = resource->data;
 131         struct wl_kms_buffer *buffer;
 132         int err;
 133
 134         switch (format) {
 135         case WL_KMS_FORMAT_ARGB8888:
 136         case WL_KMS_FORMAT_XRGB8888:
 137                 break;
 138         default:
 139                 wl_resource_post_error(resource,
 140                                        WL_KMS_ERROR_INVALID_FORMAT,
 141                                        "invalid format");
 142                 return;
 143         }
 144
 145         buffer = calloc(1, sizeof *buffer);
 146         if (buffer == NULL) {
 147                 wl_resource_post_no_memory(resource);
 148                 return;
 149         }
 150
 151         buffer->kms = kms;
 152         buffer->width = width;
 153         buffer->height = height;
 154         buffer->format = format;
 155         buffer->stride = stride;
 156         buffer->fd = prime_fd;
 157
 158         WLKMS_DEBUG("%s: %s: prime_fd=%d\n", __FILE__, __func__, prime_fd);
 159
 160         if ((err = drmPrimeFDToHandle(kms->fd, prime_fd, &buffer->handle))) {
 161                 WLKMS_DEBUG("%s: %s: drmPrimeFDToHandle() failed...%d (%s)\n", __FILE__, __func__, err, strerror(errno));
 162                 wl_resource_post_error(resource,
 163                                        WL_KMS_ERROR_INVALID_FD,
 164                                        "invalid prime FD");
 165                 return;
 166         }
 167
 168         // We create a wl_buffer
 169         buffer->resource = wl_resource_create(client, &wl_buffer_interface, 1, id);
 170         if (!buffer->resource) {
 171                 wl_resource_post_no_memory(resource);
 172                 free(buffer);
 173                 return;
 174         }
 175
 176         wl_resource_set_implementation(buffer->resource,
 177                                        (void (**)(void))&kms_buffer_interface,
 178                                        buffer, destroy_buffer);
 179 }
 180
 181 const static struct wl_kms_interface kms_interface = {
 182         .authenticate = kms_authenticate,
 183         .create_buffer = kms_create_buffer,
 184 };
 185
 186 static void
 187 bind_kms(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 188 {
 189         struct wl_kms *kms = data;
 190         struct wl_resource *resource;
 191         uint32_t capabilities;
 192
 193         resource = wl_resource_create(client, &wl_kms_interface, version, id);
 194         if (!resource) {
 195                 wl_client_post_no_memory(client);
 196                 return;
 197         }
 198
 199         wl_resource_set_implementation(resource, &kms_interface, data, NULL);
 200
 201         wl_resource_post_event(resource, WL_KMS_DEVICE, kms->device_name);
 202         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_ARGB8888);
 203         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_XRGB8888);
 204 }
 205
 206 int wayland_kms_fd_get(struct wl_kms* kms)
 207 {
 208         return kms->fd;
 209 }
 210
 211 struct wl_kms_buffer *wayland_kms_buffer_get(struct wl_resource *resource)
 212 {
 213         if (resource == NULL)
 214                 return NULL;
 215
 216         if (wl_resource_instance_of(resource, &wl_buffer_interface,
 217                                     &kms_buffer_interface))
 218                 return wl_resource_get_user_data(resource);
 219         else
 220                 return NULL;
 221 }
 222
 223 struct wl_kms *wayland_kms_init(struct wl_display *display,
 224                                 struct wl_display *server, char *device_name, int fd)
 225 {
 226         struct wl_kms *kms;
 227
 228         if (!(kms = calloc(1, sizeof(struct wl_kms))))
 229                 return NULL;
 230
 231         kms->display = display;
 232         kms->device_name = strdup(device_name);
 233         kms->fd = fd;
 234
 235         wl_global_create(display, &wl_kms_interface, 1, kms, bind_kms);
 236
 237         /*
 238          * we're the server in the middle. we should forward the auth
 239          * request to our server.
 240          */
 241         if (server) {
 242                 drm_magic_t magic;
 243
 244                 if (!(kms->auth = kms_auth_init(server)))
 245                         goto error;
 246
 247                 /* get a magic */
 248                 if (drmGetMagic(fd, &magic) < 0)
 249                         goto error;
 250
 251                 /* authenticate myself */
 252                 if (kms_auth_request(kms->auth, magic) < 0)
 253                         goto error;
 254         }
 255
 256         return kms;
 257
 258 error:
 259         free(kms);
 260         return NULL;
 261 }
 262
 263 void wayland_kms_uninit(struct wl_kms *kms)
 264 {
 265         free(kms->device_name);
 266
 267         /* FIXME: need wl_display_del_{object,global} */
 268
 269         free(kms);
 270 }
 271
 272 uint32_t wayland_kms_buffer_get_format(struct wl_kms_buffer *buffer)
 273 {
 274         return buffer->format;
 275 }
 276
 277 int wayland_kms_query_buffer(struct wl_kms *kms, struct wl_resource *resource,
 278                                 enum wl_kms_attribute attr, int *value)
 279 {
 280         struct wl_kms_buffer *buffer = wayland_kms_buffer_get(resource);
 281         if (!buffer)
 282                 return -1;
 283
 284         switch(attr) {
 285         case WL_KMS_WIDTH:
 286                 *value = buffer->width;
 287                 return 0;
 288
 289         case WL_KMS_HEIGHT:
 290                 *value = buffer->height;
 291                 return 0;
 292
 293         case WL_KMS_TEXTURE_FORMAT:
 294                 *value = EGL_TEXTURE_RGBA;
 295                 return 0;
 296         }
 297
 298         return -1;
 299 }