src/gallium/auxiliary/vl/vl_winsys_dri.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Younes Manton.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* directly referenced from target Makefile, because of X dependencies */
  29
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <fcntl.h>
  33
  34 #include <X11/Xlib-xcb.h>
  35 #include <xcb/dri2.h>
  36 #include <xf86drm.h>
  37
  38 #include "pipe/p_screen.h"
  39 #include "pipe/p_context.h"
  40 #include "pipe/p_state.h"
  41 #include "state_tracker/drm_driver.h"
  42
  43 #include "util/u_memory.h"
  44 #include "util/u_hash.h"
  45 #include "util/u_hash_table.h"
  46 #include "util/u_inlines.h"
  47
  48 #include "vl/vl_compositor.h"
  49 #include "vl/vl_winsys.h"
  50
  51 struct vl_dri_screen
  52 {
  53    struct vl_screen base;
  54    xcb_connection_t *conn;
  55    xcb_drawable_t drawable;
  56
  57    unsigned width, height;
  58
  59    bool current_buffer;
  60    uint32_t buffer_names[2];
  61    struct u_rect dirty_areas[2];
  62
  63    bool flushed;
  64    xcb_dri2_swap_buffers_cookie_t swap_cookie;
  65    xcb_dri2_wait_sbc_cookie_t wait_cookie;
  66    xcb_dri2_get_buffers_cookie_t buffers_cookie;
  67
  68    int64_t last_ust, ns_frame, last_msc, next_msc;
  69 };
  70
  71 static const unsigned int attachments[1] = { XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT };
  72
  73 static void
  74 vl_dri2_handle_stamps(struct vl_dri_screen* scrn,
  75                       uint32_t ust_hi, uint32_t ust_lo,
  76                       uint32_t msc_hi, uint32_t msc_lo)
  77 {
  78    int64_t ust = ((((uint64_t)ust_hi) << 32) | ust_lo) * 1000;
  79    int64_t msc = (((uint64_t)msc_hi) << 32) | msc_lo;
  80
  81    if (scrn->last_ust && scrn->last_msc && (ust > scrn->last_ust) && (msc > scrn->last_msc))
  82       scrn->ns_frame = (ust - scrn->last_ust) / (msc - scrn->last_msc);
  83
  84    scrn->last_ust = ust;
  85    scrn->last_msc = msc;
  86 }
  87
  88 static xcb_dri2_get_buffers_reply_t*
  89 vl_dri2_get_flush_reply(struct vl_dri_screen *scrn)
  90 {
  91    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
  92
  93    assert(scrn);
  94
  95    if (!scrn->flushed)
  96       return NULL;
  97
  98    scrn->flushed = false;
  99
 100    free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
 101
 102    wait_sbc_reply = xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL);
 103    if (!wait_sbc_reply)
 104       return NULL;
 105    vl_dri2_handle_stamps(scrn, wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo,
 106                          wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 107    free(wait_sbc_reply);
 108
 109    return xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL);
 110 }
 111
 112 static void
 113 vl_dri2_flush_frontbuffer(struct pipe_screen *screen,
 114                           struct pipe_resource *resource,
 115                           unsigned level, unsigned layer,
 116                           void *context_private)
 117 {
 118    struct vl_dri_screen *scrn = (struct vl_dri_screen*)context_private;
 119    uint32_t msc_hi, msc_lo;
 120
 121    assert(screen);
 122    assert(resource);
 123    assert(context_private);
 124
 125    free(vl_dri2_get_flush_reply(scrn));
 126
 127    msc_hi = scrn->next_msc >> 32;
 128    msc_lo = scrn->next_msc & 0xFFFFFFFF;
 129
 130    scrn->swap_cookie = xcb_dri2_swap_buffers_unchecked(scrn->conn, scrn->drawable, msc_hi, msc_lo, 0, 0, 0, 0);
 131    scrn->wait_cookie = xcb_dri2_wait_sbc_unchecked(scrn->conn, scrn->drawable, 0, 0);
 132    scrn->buffers_cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, scrn->drawable, 1, 1, attachments);
 133
 134    scrn->flushed = true;
 135    scrn->current_buffer = !scrn->current_buffer;
 136 }
 137
 138 static void
 139 vl_dri2_destroy_drawable(struct vl_dri_screen *scrn)
 140 {
 141    xcb_void_cookie_t destroy_cookie;
 142    if (scrn->drawable) {
 143       free(vl_dri2_get_flush_reply(scrn));
 144       destroy_cookie = xcb_dri2_destroy_drawable_checked(scrn->conn, scrn->drawable);
 145       /* ignore any error here, since the drawable can be destroyed long ago */
 146       free(xcb_request_check(scrn->conn, destroy_cookie));
 147    }
 148 }
 149
 150 static void
 151 vl_dri2_set_drawable(struct vl_dri_screen *scrn, Drawable drawable)
 152 {
 153    assert(scrn);
 154    assert(drawable);
 155
 156    if (scrn->drawable == drawable)
 157       return;
 158
 159    vl_dri2_destroy_drawable(scrn);
 160
 161    xcb_dri2_create_drawable(scrn->conn, drawable);
 162    scrn->current_buffer = false;
 163    vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 164    vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 165    scrn->drawable = drawable;
 166 }
 167
 168 struct pipe_resource*
 169 vl_screen_texture_from_drawable(struct vl_screen *vscreen, Drawable drawable)
 170 {
 171    struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
 172
 173    struct winsys_handle dri2_handle;
 174    struct pipe_resource template, *tex;
 175
 176    xcb_dri2_get_buffers_reply_t *reply;
 177    xcb_dri2_dri2_buffer_t *buffers, *back_left;
 178
 179    unsigned i;
 180
 181    assert(scrn);
 182
 183    vl_dri2_set_drawable(scrn, drawable);
 184    reply = vl_dri2_get_flush_reply(scrn);
 185    if (!reply) {
 186       xcb_dri2_get_buffers_cookie_t cookie;
 187       cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, drawable, 1, 1, attachments);
 188       reply = xcb_dri2_get_buffers_reply(scrn->conn, cookie, NULL);
 189    }
 190    if (!reply)
 191       return NULL;
 192
 193    buffers = xcb_dri2_get_buffers_buffers(reply);
 194    if (!buffers)  {
 195       free(reply);
 196       return NULL;
 197    }
 198
 199    for (i = 0; i < reply->count; ++i) {
 200       if (buffers[i].attachment == XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT) {
 201          back_left = &buffers[i];
 202          break;
 203       }
 204    }
 205
 206    if (i == reply->count) {
 207       free(reply);
 208       return NULL;
 209    }
 210
 211    if (reply->width != scrn->width || reply->height != scrn->height) {
 212       vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 213       vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 214       scrn->width = reply->width;
 215       scrn->height = reply->height;
 216
 217    } else if (back_left->name != scrn->buffer_names[scrn->current_buffer]) {
 218       vl_compositor_reset_dirty_area(&scrn->dirty_areas[scrn->current_buffer]);
 219       scrn->buffer_names[scrn->current_buffer] = back_left->name;
 220    }
 221
 222    memset(&dri2_handle, 0, sizeof(dri2_handle));
 223    dri2_handle.type = DRM_API_HANDLE_TYPE_SHARED;
 224    dri2_handle.handle = back_left->name;
 225    dri2_handle.stride = back_left->pitch;
 226
 227    memset(&template, 0, sizeof(template));
 228    template.target = PIPE_TEXTURE_2D;
 229    template.format = PIPE_FORMAT_B8G8R8X8_UNORM;
 230    template.last_level = 0;
 231    template.width0 = reply->width;
 232    template.height0 = reply->height;
 233    template.depth0 = 1;
 234    template.array_size = 1;
 235    template.usage = PIPE_USAGE_STATIC;
 236    template.bind = PIPE_BIND_RENDER_TARGET;
 237    template.flags = 0;
 238
 239    tex = scrn->base.pscreen->resource_from_handle(scrn->base.pscreen, &template, &dri2_handle);
 240    free(reply);
 241
 242    return tex;
 243 }
 244
 245 struct u_rect *
 246 vl_screen_get_dirty_area(struct vl_screen *vscreen)
 247 {
 248    struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
 249    assert(scrn);
 250    return &scrn->dirty_areas[scrn->current_buffer];
 251 }
 252
 253 uint64_t
 254 vl_screen_get_timestamp(struct vl_screen *vscreen, Drawable drawable)
 255 {
 256    struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
 257    xcb_dri2_get_msc_cookie_t cookie;
 258    xcb_dri2_get_msc_reply_t *reply;
 259
 260    assert(scrn);
 261
 262    vl_dri2_set_drawable(scrn, drawable);
 263    if (!scrn->last_ust) {
 264       cookie = xcb_dri2_get_msc_unchecked(scrn->conn, drawable);
 265       reply = xcb_dri2_get_msc_reply(scrn->conn, cookie, NULL);
 266
 267       if (reply) {
 268          vl_dri2_handle_stamps(scrn, reply->ust_hi, reply->ust_lo,
 269                                reply->msc_hi, reply->msc_lo);
 270          free(reply);
 271       }
 272    }
 273    return scrn->last_ust;
 274 }
 275
 276 void
 277 vl_screen_set_next_timestamp(struct vl_screen *vscreen, uint64_t stamp)
 278 {
 279    struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
 280    assert(scrn);
 281    if (stamp && scrn->last_ust && scrn->ns_frame && scrn->last_msc)
 282       scrn->next_msc = ((int64_t)stamp - scrn->last_ust + scrn->ns_frame/2) / scrn->ns_frame + scrn->last_msc;
 283    else
 284       scrn->next_msc = 0;
 285 }
 286
 287 void*
 288 vl_screen_get_private(struct vl_screen *vscreen)
 289 {
 290    return vscreen;
 291 }
 292
 293 struct vl_screen*
 294 vl_screen_create(Display *display, int screen)
 295 {
 296    struct vl_dri_screen *scrn;
 297    const xcb_query_extension_reply_t *extension;
 298    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 299    xcb_dri2_query_version_reply_t *dri2_query = NULL;
 300    xcb_dri2_connect_cookie_t connect_cookie;
 301    xcb_dri2_connect_reply_t *connect = NULL;
 302    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 303    xcb_dri2_authenticate_reply_t *authenticate = NULL;
 304    xcb_screen_iterator_t s;
 305    xcb_generic_error_t *error = NULL;
 306    char *device_name;
 307    int fd, device_name_length;
 308
 309    drm_magic_t magic;
 310
 311    assert(display);
 312
 313    scrn = CALLOC_STRUCT(vl_dri_screen);
 314    if (!scrn)
 315       return NULL;
 316
 317    scrn->conn = XGetXCBConnection(display);
 318    if (!scrn->conn)
 319       goto free_screen;
 320
 321    xcb_prefetch_extension_data(scrn->conn, &xcb_dri2_id);
 322
 323    extension = xcb_get_extension_data(scrn->conn, &xcb_dri2_id);
 324    if (!(extension && extension->present))
 325       goto free_screen;
 326
 327    dri2_query_cookie = xcb_dri2_query_version (scrn->conn, XCB_DRI2_MAJOR_VERSION, XCB_DRI2_MINOR_VERSION);
 328    dri2_query = xcb_dri2_query_version_reply (scrn->conn, dri2_query_cookie, &error);
 329    if (dri2_query == NULL || error != NULL || dri2_query->minor_version < 2)
 330       goto free_screen;
 331
 332    s = xcb_setup_roots_iterator(xcb_get_setup(scrn->conn));
 333    while (screen--)
 334         xcb_screen_next(&s);
 335    connect_cookie = xcb_dri2_connect_unchecked(scrn->conn, s.data->root, XCB_DRI2_DRIVER_TYPE_DRI);
 336    connect = xcb_dri2_connect_reply(scrn->conn, connect_cookie, NULL);
 337    if (connect == NULL || connect->driver_name_length + connect->device_name_length == 0)
 338       goto free_screen;
 339
 340    device_name_length = xcb_dri2_connect_device_name_length(connect);
 341    device_name = CALLOC(1, device_name_length + 1);
 342    memcpy(device_name, xcb_dri2_connect_device_name(connect), device_name_length);
 343    fd = open(device_name, O_RDWR);
 344    free(device_name);
 345
 346    if (fd < 0)
 347       goto free_screen;
 348
 349    if (drmGetMagic(fd, &magic))
 350       goto free_screen;
 351
 352    authenticate_cookie = xcb_dri2_authenticate_unchecked(scrn->conn, s.data->root, magic);
 353    authenticate = xcb_dri2_authenticate_reply(scrn->conn, authenticate_cookie, NULL);
 354
 355    if (authenticate == NULL || !authenticate->authenticated)
 356       goto free_screen;
 357
 358    scrn->base.pscreen = driver_descriptor.create_screen(fd);
 359    if (!scrn->base.pscreen)
 360       goto free_screen;
 361
 362    scrn->base.pscreen->flush_frontbuffer = vl_dri2_flush_frontbuffer;
 363    vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 364    vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 365
 366    free(dri2_query);
 367    free(connect);
 368    free(authenticate);
 369
 370    return &scrn->base;
 371
 372 free_screen:
 373    FREE(scrn);
 374
 375    free(dri2_query);
 376    free(connect);
 377    free(authenticate);
 378    free(error);
 379
 380    return NULL;
 381 }
 382
 383 void vl_screen_destroy(struct vl_screen *vscreen)
 384 {
 385    struct vl_dri_screen *scrn = (struct vl_dri_screen*)vscreen;
 386
 387    assert(vscreen);
 388
 389    if (scrn->flushed) {
 390       free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
 391       free(xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL));
 392       free(xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL));
 393    }
 394
 395    vl_dri2_destroy_drawable(scrn);
 396    scrn->base.pscreen->destroy(scrn->base.pscreen);
 397    FREE(scrn);
 398 }