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 struct wl_kms {
  54         struct wl_display *display;
  55         int fd;                         /* FD for DRM */
  56         char *device_name;
  57
  58         struct kms_auth *auth;          /* for nested authentication */
  59 };
  60
  61 /*
  62  * wl_kms server
  63  */
  64
  65 static void destroy_buffer(struct wl_resource *resource)
  66 {
  67         struct wl_kms_buffer *buffer = resource->data;
  68         free(buffer);
  69 }
  70
  71 static void
  72 buffer_destroy(struct wl_client *client, struct wl_resource *resource)
  73 {
  74         wl_resource_destroy(resource);
  75 }
  76
  77 const static struct wl_buffer_interface kms_buffer_interface = {
  78         .destroy = buffer_destroy
  79 };
  80
  81 static void
  82 kms_authenticate(struct wl_client *client, struct wl_resource *resource,
  83                  uint32_t magic)
  84 {
  85         struct wl_kms *kms = resource->data;
  86         int err;
  87
  88         WLKMS_DEBUG("%s: %s: magic=%lu\n", __FILE__, __func__, magic);
  89
  90         if (kms->auth) {
  91                 err = kms_auth_request(kms->auth, magic);
  92         } else {
  93                 err = drmAuthMagic(kms->fd, magic);
  94         }
  95
  96         if (err < 0) {
  97                 wl_resource_post_error(resource, WL_KMS_ERROR_AUTHENTICATION_FAILED,
  98                                        "authentication failed");
  99                 WLKMS_DEBUG("%s: %s: authentication failed.\n", __FILE__, __func__);
 100         } else {
 101                 wl_resource_post_event(resource, WL_KMS_AUTHENTICATED);
 102                 WLKMS_DEBUG("%s: %s: authentication succeeded.\n", __FILE__, __func__);
 103         }
 104 }
 105
 106 static void
 107 kms_create_buffer(struct wl_client *client, struct wl_resource *resource,
 108                   uint32_t id, int32_t prime_fd, int32_t width, int32_t height,
 109                   uint32_t stride, uint32_t format, uint32_t handle)
 110 {
 111         struct wl_kms *kms = resource->data;
 112         struct wl_kms_buffer *buffer;
 113         int err;
 114
 115         switch (format) {
 116         case WL_KMS_FORMAT_ARGB8888:
 117         case WL_KMS_FORMAT_XRGB8888:
 118                 break;
 119         default:
 120                 wl_resource_post_error(resource,
 121                                        WL_KMS_ERROR_INVALID_FORMAT,
 122                                        "invalid format");
 123                 return;
 124         }
 125
 126         buffer = calloc(1, sizeof *buffer);
 127         if (buffer == NULL) {
 128                 wl_resource_post_no_memory(resource);
 129                 return;
 130         }
 131
 132         buffer->kms = kms;
 133         buffer->width = width;
 134         buffer->height = height;
 135         buffer->format = format;
 136         buffer->stride = stride;
 137         buffer->fd = prime_fd;
 138
 139         WLKMS_DEBUG("%s: %s: prime_fd=%d\n", __FILE__, __func__, prime_fd);
 140 #if 0
 141         if ((err = drmPrimeFDToHandle(kms->fd, prime_fd, &buffer->handle))) {
 142                 WLKMS_DEBUG("%s: %s: drmPrimeFDToHandle() failed...%d (%s)\n", __FILE__, __func__, err, strerror(errno));
 143                 wl_resource_post_error(resource,
 144                                        WL_KMS_ERROR_INVALID_FD,
 145                                        "invalid prime FD");
 146                 return;
 147         }
 148 #else
 149         {
 150                 struct drm_gem_open op;
 151                 int ret;
 152
 153                 op.name   = prime_fd;
 154                 op.handle = 0;
 155
 156                 ret = drmIoctl(kms->fd, DRM_IOCTL_GEM_OPEN, &op);
 157                 if (ret) {
 158                         WLKMS_DEBUG("%s: %s: DRM_IOCTL_GEM_OPEN failed...(%s)\n", __FILE__, __func__, strerror(errno));
 159                         wl_resource_post_error(resource, WL_KMS_ERROR_INVALID_FD, "invalid prime FD");
 160                         return;
 161                 }
 162                 buffer->handle = op.handle;
 163         }
 164 #endif
 165
 166         // We create a wl_buffer
 167         buffer->resource = wl_resource_create(client, &wl_buffer_interface, 1, id);
 168         if (!buffer->resource) {
 169                 wl_resource_post_no_memory(resource);
 170                 free(buffer);
 171                 return;
 172         }
 173
 174         wl_resource_set_implementation(buffer->resource,
 175                                        (void (**)(void))&kms_buffer_interface,
 176                                        buffer, destroy_buffer);
 177 }
 178
 179 const static struct wl_kms_interface kms_interface = {
 180         .authenticate = kms_authenticate,
 181         .create_buffer = kms_create_buffer,
 182 };
 183
 184 static void
 185 bind_kms(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 186 {
 187         struct wl_kms *kms = data;
 188         struct wl_resource *resource;
 189         uint32_t capabilities;
 190
 191         resource = wl_resource_create(client, &wl_kms_interface, version, id);
 192         if (!resource) {
 193                 wl_client_post_no_memory(client);
 194                 return;
 195         }
 196
 197         wl_resource_set_implementation(resource, &kms_interface, data, NULL);
 198
 199         wl_resource_post_event(resource, WL_KMS_DEVICE, kms->device_name);
 200         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_ARGB8888);
 201         wl_resource_post_event(resource, WL_KMS_FORMAT, WL_KMS_FORMAT_XRGB8888);
 202 }
 203
 204 struct wl_kms_buffer *wayland_kms_buffer_get(struct wl_resource *resource)
 205 {
 206         if (resource == NULL)
 207                 return NULL;
 208
 209         if (wl_resource_instance_of(resource, &wl_buffer_interface,
 210                                     &kms_buffer_interface))
 211                 return wl_resource_get_user_data(resource);
 212         else
 213                 return NULL;
 214 }
 215
 216 struct wl_kms *wayland_kms_init(struct wl_display *display,
 217                                 struct wl_display *server, char *device_name, int fd)
 218 {
 219         struct wl_kms *kms;
 220
 221         if (!(kms = calloc(1, sizeof(struct wl_kms))))
 222                 return NULL;
 223
 224         kms->display = display;
 225         kms->device_name = strdup(device_name);
 226         kms->fd = fd;
 227
 228         wl_global_create(display, &wl_kms_interface, 1, kms, bind_kms);
 229
 230         /*
 231          * we're the server in the middle. we should forward the auth
 232          * request to our server.
 233          */
 234         if (server) {
 235                 if (!(kms->auth = kms_auth_init(server))) {
 236                         free(kms);
 237                         kms = NULL;
 238                 }
 239         }
 240
 241         return kms;
 242 }
 243
 244 void wayland_kms_uninit(struct wl_kms *kms)
 245 {
 246         free(kms->device_name);
 247
 248         /* FIXME: need wl_display_del_{object,global} */
 249
 250         free(kms);
 251 }
 252
 253 uint32_t wayland_kms_buffer_get_format(struct wl_kms_buffer *buffer)
 254 {
 255         return buffer->format;
 256 }
 257
 258 int wayland_kms_query_buffer(struct wl_kms *kms, struct wl_resource *resource,
 259                                 enum wl_kms_attribute attr, int *value)
 260 {
 261         struct wl_kms_buffer *buffer = wayland_kms_buffer_get(resource);
 262         if (!buffer)
 263                 return -1;
 264
 265         switch(attr) {
 266         case WL_KMS_WIDTH:
 267                 *value = buffer->width;
 268                 return 0;
 269
 270         case WL_KMS_HEIGHT:
 271                 *value = buffer->height;
 272                 return 0;
 273
 274         case WL_KMS_TEXTURE_FORMAT:
 275                 *value = WL_KMS_FORMAT_ARGB8888;
 276                 return 0;
 277         }
 278
 279         return -1;
 280 }