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 VMWARE 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 <X11/extensions/dri2tokens.h>
  36 #include <xcb/dri2.h>
  37 #include <xf86drm.h>
  38 #include <errno.h>
  39
  40 #include "loader.h"
  41
  42 #include "pipe/p_screen.h"
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_state.h"
  45 #include "pipe-loader/pipe_loader.h"
  46 #include "state_tracker/drm_driver.h"
  47
  48 #include "util/u_memory.h"
  49 #include "util/crc32.h"
  50 #include "util/u_hash_table.h"
  51 #include "util/u_inlines.h"
  52
  53 #include "vl/vl_compositor.h"
  54 #include "vl/vl_winsys.h"
  55
  56 struct vl_dri_screen
  57 {
  58    struct vl_screen base;
  59    xcb_connection_t *conn;
  60    xcb_drawable_t drawable;
  61
  62    unsigned width, height;
  63
  64    bool current_buffer;
  65    uint32_t buffer_names[2];
  66    struct u_rect dirty_areas[2];
  67
  68    bool flushed;
  69    xcb_dri2_swap_buffers_cookie_t swap_cookie;
  70    xcb_dri2_wait_sbc_cookie_t wait_cookie;
  71    xcb_dri2_get_buffers_cookie_t buffers_cookie;
  72
  73    int64_t last_ust, ns_frame, last_msc, next_msc;
  74 };
  75
  76 static const unsigned attachments[1] = { XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT };
  77
  78 static void vl_dri2_screen_destroy(struct vl_screen *vscreen);
  79
  80 static void
  81 vl_dri2_handle_stamps(struct vl_dri_screen *scrn,
  82                       uint32_t ust_hi, uint32_t ust_lo,
  83                       uint32_t msc_hi, uint32_t msc_lo)
  84 {
  85    int64_t ust = ((((uint64_t)ust_hi) << 32) | ust_lo) * 1000;
  86    int64_t msc = (((uint64_t)msc_hi) << 32) | msc_lo;
  87
  88    if (scrn->last_ust && (ust > scrn->last_ust) &&
  89        scrn->last_msc && (msc > scrn->last_msc))
  90       scrn->ns_frame = (ust - scrn->last_ust) / (msc - scrn->last_msc);
  91
  92    scrn->last_ust = ust;
  93    scrn->last_msc = msc;
  94 }
  95
  96 static xcb_dri2_get_buffers_reply_t *
  97 vl_dri2_get_flush_reply(struct vl_dri_screen *scrn)
  98 {
  99    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 100
 101    assert(scrn);
 102
 103    if (!scrn->flushed)
 104       return NULL;
 105
 106    scrn->flushed = false;
 107
 108    free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
 109
 110    wait_sbc_reply = xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL);
 111    if (!wait_sbc_reply)
 112       return NULL;
 113    vl_dri2_handle_stamps(scrn, wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo,
 114                          wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 115    free(wait_sbc_reply);
 116
 117    return xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL);
 118 }
 119
 120 static void
 121 vl_dri2_flush_frontbuffer(struct pipe_screen *screen,
 122                           struct pipe_resource *resource,
 123                           unsigned level, unsigned layer,
 124                           void *context_private, struct pipe_box *sub_box)
 125 {
 126    struct vl_dri_screen *scrn = (struct vl_dri_screen *)context_private;
 127    uint32_t msc_hi, msc_lo;
 128
 129    assert(screen);
 130    assert(resource);
 131    assert(context_private);
 132
 133    free(vl_dri2_get_flush_reply(scrn));
 134
 135    msc_hi = scrn->next_msc >> 32;
 136    msc_lo = scrn->next_msc & 0xFFFFFFFF;
 137
 138    scrn->swap_cookie = xcb_dri2_swap_buffers_unchecked(scrn->conn, scrn->drawable,
 139                                                        msc_hi, msc_lo, 0, 0, 0, 0);
 140    scrn->wait_cookie = xcb_dri2_wait_sbc_unchecked(scrn->conn, scrn->drawable, 0, 0);
 141    scrn->buffers_cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, scrn->drawable,
 142                                                          1, 1, attachments);
 143
 144    scrn->flushed = true;
 145    scrn->current_buffer = !scrn->current_buffer;
 146 }
 147
 148 static void
 149 vl_dri2_destroy_drawable(struct vl_dri_screen *scrn)
 150 {
 151    xcb_void_cookie_t destroy_cookie;
 152    if (scrn->drawable) {
 153       free(vl_dri2_get_flush_reply(scrn));
 154       destroy_cookie = xcb_dri2_destroy_drawable_checked(scrn->conn, scrn->drawable);
 155       /* ignore any error here, since the drawable can be destroyed long ago */
 156       free(xcb_request_check(scrn->conn, destroy_cookie));
 157    }
 158 }
 159
 160 static void
 161 vl_dri2_set_drawable(struct vl_dri_screen *scrn, Drawable drawable)
 162 {
 163    assert(scrn);
 164    assert(drawable);
 165
 166    if (scrn->drawable == drawable)
 167       return;
 168
 169    vl_dri2_destroy_drawable(scrn);
 170
 171    xcb_dri2_create_drawable(scrn->conn, drawable);
 172    scrn->current_buffer = false;
 173    vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 174    vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 175    scrn->drawable = drawable;
 176 }
 177
 178 static struct pipe_resource *
 179 vl_dri2_screen_texture_from_drawable(struct vl_screen *vscreen, void *drawable)
 180 {
 181    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 182
 183    struct winsys_handle dri2_handle;
 184    struct pipe_resource template, *tex;
 185
 186    xcb_dri2_get_buffers_reply_t *reply;
 187    xcb_dri2_dri2_buffer_t *buffers, *back_left;
 188
 189    unsigned i;
 190
 191    assert(scrn);
 192
 193    vl_dri2_set_drawable(scrn, (Drawable)drawable);
 194    reply = vl_dri2_get_flush_reply(scrn);
 195    if (!reply) {
 196       xcb_dri2_get_buffers_cookie_t cookie;
 197       cookie = xcb_dri2_get_buffers_unchecked(scrn->conn, (Drawable)drawable,
 198                                               1, 1, attachments);
 199       reply = xcb_dri2_get_buffers_reply(scrn->conn, cookie, NULL);
 200    }
 201    if (!reply)
 202       return NULL;
 203
 204    buffers = xcb_dri2_get_buffers_buffers(reply);
 205    if (!buffers)  {
 206       free(reply);
 207       return NULL;
 208    }
 209
 210    for (i = 0; i < reply->count; ++i) {
 211       if (buffers[i].attachment == XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT) {
 212          back_left = &buffers[i];
 213          break;
 214       }
 215    }
 216
 217    if (i == reply->count) {
 218       free(reply);
 219       return NULL;
 220    }
 221
 222    if (reply->width != scrn->width || reply->height != scrn->height) {
 223       vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 224       vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 225       scrn->width = reply->width;
 226       scrn->height = reply->height;
 227
 228    } else if (back_left->name != scrn->buffer_names[scrn->current_buffer]) {
 229       vl_compositor_reset_dirty_area(&scrn->dirty_areas[scrn->current_buffer]);
 230       scrn->buffer_names[scrn->current_buffer] = back_left->name;
 231    }
 232
 233    memset(&dri2_handle, 0, sizeof(dri2_handle));
 234    dri2_handle.type = DRM_API_HANDLE_TYPE_SHARED;
 235    dri2_handle.handle = back_left->name;
 236    dri2_handle.stride = back_left->pitch;
 237
 238    memset(&template, 0, sizeof(template));
 239    template.target = PIPE_TEXTURE_2D;
 240    template.format = PIPE_FORMAT_B8G8R8X8_UNORM;
 241    template.last_level = 0;
 242    template.width0 = reply->width;
 243    template.height0 = reply->height;
 244    template.depth0 = 1;
 245    template.array_size = 1;
 246    template.usage = PIPE_USAGE_DEFAULT;
 247    template.bind = PIPE_BIND_RENDER_TARGET;
 248    template.flags = 0;
 249
 250    tex = scrn->base.pscreen->resource_from_handle(scrn->base.pscreen, &template,
 251                                                   &dri2_handle,
 252                                                   PIPE_HANDLE_USAGE_READ_WRITE);
 253    free(reply);
 254
 255    return tex;
 256 }
 257
 258 static struct u_rect *
 259 vl_dri2_screen_get_dirty_area(struct vl_screen *vscreen)
 260 {
 261    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 262    assert(scrn);
 263    return &scrn->dirty_areas[scrn->current_buffer];
 264 }
 265
 266 static uint64_t
 267 vl_dri2_screen_get_timestamp(struct vl_screen *vscreen, void *drawable)
 268 {
 269    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 270    xcb_dri2_get_msc_cookie_t cookie;
 271    xcb_dri2_get_msc_reply_t *reply;
 272
 273    assert(scrn);
 274
 275    vl_dri2_set_drawable(scrn, (Drawable)drawable);
 276    if (!scrn->last_ust) {
 277       cookie = xcb_dri2_get_msc_unchecked(scrn->conn, (Drawable)drawable);
 278       reply = xcb_dri2_get_msc_reply(scrn->conn, cookie, NULL);
 279
 280       if (reply) {
 281          vl_dri2_handle_stamps(scrn, reply->ust_hi, reply->ust_lo,
 282                                reply->msc_hi, reply->msc_lo);
 283          free(reply);
 284       }
 285    }
 286    return scrn->last_ust;
 287 }
 288
 289 static void
 290 vl_dri2_screen_set_next_timestamp(struct vl_screen *vscreen, uint64_t stamp)
 291 {
 292    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 293    assert(scrn);
 294    if (stamp && scrn->last_ust && scrn->ns_frame && scrn->last_msc)
 295       scrn->next_msc = ((int64_t)stamp - scrn->last_ust + scrn->ns_frame/2) /
 296                        scrn->ns_frame + scrn->last_msc;
 297    else
 298       scrn->next_msc = 0;
 299 }
 300
 301 static void *
 302 vl_dri2_screen_get_private(struct vl_screen *vscreen)
 303 {
 304    return vscreen;
 305 }
 306
 307 static xcb_screen_t *
 308 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 309 {
 310     for (; iter.rem; --screen, xcb_screen_next(&iter))
 311         if (screen == 0)
 312             return iter.data;
 313
 314     return NULL;
 315 }
 316
 317 struct vl_screen *
 318 vl_dri2_screen_create(Display *display, int screen)
 319 {
 320    struct vl_dri_screen *scrn;
 321    const xcb_query_extension_reply_t *extension;
 322    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 323    xcb_dri2_query_version_reply_t *dri2_query = NULL;
 324    xcb_dri2_connect_cookie_t connect_cookie;
 325    xcb_dri2_connect_reply_t *connect = NULL;
 326    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 327    xcb_dri2_authenticate_reply_t *authenticate = NULL;
 328    xcb_screen_iterator_t s;
 329    xcb_screen_t *xcb_screen;
 330    xcb_generic_error_t *error = NULL;
 331    char *device_name;
 332    int fd, device_name_length;
 333    unsigned driverType;
 334
 335    drm_magic_t magic;
 336
 337    assert(display);
 338
 339    scrn = CALLOC_STRUCT(vl_dri_screen);
 340    if (!scrn)
 341       return NULL;
 342
 343    scrn->conn = XGetXCBConnection(display);
 344    if (!scrn->conn)
 345       goto free_screen;
 346
 347    xcb_prefetch_extension_data(scrn->conn, &xcb_dri2_id);
 348
 349    extension = xcb_get_extension_data(scrn->conn, &xcb_dri2_id);
 350    if (!(extension && extension->present))
 351       goto free_screen;
 352
 353    dri2_query_cookie = xcb_dri2_query_version (scrn->conn,
 354                                                XCB_DRI2_MAJOR_VERSION,
 355                                                XCB_DRI2_MINOR_VERSION);
 356    dri2_query = xcb_dri2_query_version_reply (scrn->conn, dri2_query_cookie, &error);
 357    if (dri2_query == NULL || error != NULL || dri2_query->minor_version < 2)
 358       goto free_query;
 359
 360    s = xcb_setup_roots_iterator(xcb_get_setup(scrn->conn));
 361    xcb_screen = get_xcb_screen(s, screen);
 362    if (!xcb_screen)
 363       goto free_query;
 364
 365    driverType = XCB_DRI2_DRIVER_TYPE_DRI;
 366 #ifdef DRI2DriverPrimeShift
 367    {
 368       char *prime = getenv("DRI_PRIME");
 369       if (prime) {
 370          unsigned primeid;
 371          errno = 0;
 372          primeid = strtoul(prime, NULL, 0);
 373          if (errno == 0)
 374             driverType |=
 375                ((primeid & DRI2DriverPrimeMask) << DRI2DriverPrimeShift);
 376       }
 377    }
 378 #endif
 379
 380    connect_cookie = xcb_dri2_connect_unchecked(scrn->conn,
 381                                                xcb_screen->root,
 382                                                driverType);
 383    connect = xcb_dri2_connect_reply(scrn->conn, connect_cookie, NULL);
 384    if (connect == NULL ||
 385        connect->driver_name_length + connect->device_name_length == 0)
 386       goto free_connect;
 387
 388    device_name_length = xcb_dri2_connect_device_name_length(connect);
 389    device_name = CALLOC(1, device_name_length + 1);
 390    if (!device_name)
 391       goto free_connect;
 392    memcpy(device_name, xcb_dri2_connect_device_name(connect), device_name_length);
 393    fd = loader_open_device(device_name);
 394    free(device_name);
 395
 396    if (fd < 0)
 397       goto free_connect;
 398
 399    if (drmGetMagic(fd, &magic))
 400       goto close_fd;
 401
 402    authenticate_cookie = xcb_dri2_authenticate_unchecked(scrn->conn,
 403                                                          xcb_screen->root,
 404                                                          magic);
 405    authenticate = xcb_dri2_authenticate_reply(scrn->conn, authenticate_cookie, NULL);
 406
 407    if (authenticate == NULL || !authenticate->authenticated)
 408       goto free_authenticate;
 409
 410    if (pipe_loader_drm_probe_fd(&scrn->base.dev, fd))
 411       scrn->base.pscreen = pipe_loader_create_screen(scrn->base.dev);
 412
 413    if (!scrn->base.pscreen)
 414       goto release_pipe;
 415
 416    scrn->base.destroy = vl_dri2_screen_destroy;
 417    scrn->base.texture_from_drawable = vl_dri2_screen_texture_from_drawable;
 418    scrn->base.get_dirty_area = vl_dri2_screen_get_dirty_area;
 419    scrn->base.get_timestamp = vl_dri2_screen_get_timestamp;
 420    scrn->base.set_next_timestamp = vl_dri2_screen_set_next_timestamp;
 421    scrn->base.get_private = vl_dri2_screen_get_private;
 422    scrn->base.pscreen->flush_frontbuffer = vl_dri2_flush_frontbuffer;
 423    vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 424    vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 425
 426    free(authenticate);
 427    free(connect);
 428    free(dri2_query);
 429    free(error);
 430
 431    return &scrn->base;
 432
 433 release_pipe:
 434    if (scrn->base.dev) {
 435       pipe_loader_release(&scrn->base.dev, 1);
 436       fd = -1;
 437    }
 438 free_authenticate:
 439    free(authenticate);
 440 close_fd:
 441    if (fd != -1)
 442       close(fd);
 443 free_connect:
 444    free(connect);
 445 free_query:
 446    free(dri2_query);
 447    free(error);
 448
 449 free_screen:
 450    FREE(scrn);
 451    return NULL;
 452 }
 453
 454 static void
 455 vl_dri2_screen_destroy(struct vl_screen *vscreen)
 456 {
 457    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 458
 459    assert(vscreen);
 460
 461    if (scrn->flushed) {
 462       free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
 463       free(xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL));
 464       free(xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL));
 465    }
 466
 467    vl_dri2_destroy_drawable(scrn);
 468    scrn->base.pscreen->destroy(scrn->base.pscreen);
 469    pipe_loader_release(&scrn->base.dev, 1);
 470    FREE(scrn);
 471 }