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/u_hash.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    free(reply);
 253
 254    return tex;
 255 }
 256
 257 static struct u_rect *
 258 vl_dri2_screen_get_dirty_area(struct vl_screen *vscreen)
 259 {
 260    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 261    assert(scrn);
 262    return &scrn->dirty_areas[scrn->current_buffer];
 263 }
 264
 265 static uint64_t
 266 vl_dri2_screen_get_timestamp(struct vl_screen *vscreen, void *drawable)
 267 {
 268    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 269    xcb_dri2_get_msc_cookie_t cookie;
 270    xcb_dri2_get_msc_reply_t *reply;
 271
 272    assert(scrn);
 273
 274    vl_dri2_set_drawable(scrn, (Drawable)drawable);
 275    if (!scrn->last_ust) {
 276       cookie = xcb_dri2_get_msc_unchecked(scrn->conn, (Drawable)drawable);
 277       reply = xcb_dri2_get_msc_reply(scrn->conn, cookie, NULL);
 278
 279       if (reply) {
 280          vl_dri2_handle_stamps(scrn, reply->ust_hi, reply->ust_lo,
 281                                reply->msc_hi, reply->msc_lo);
 282          free(reply);
 283       }
 284    }
 285    return scrn->last_ust;
 286 }
 287
 288 static void
 289 vl_dri2_screen_set_next_timestamp(struct vl_screen *vscreen, uint64_t stamp)
 290 {
 291    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 292    assert(scrn);
 293    if (stamp && scrn->last_ust && scrn->ns_frame && scrn->last_msc)
 294       scrn->next_msc = ((int64_t)stamp - scrn->last_ust + scrn->ns_frame/2) /
 295                        scrn->ns_frame + scrn->last_msc;
 296    else
 297       scrn->next_msc = 0;
 298 }
 299
 300 static void *
 301 vl_dri2_screen_get_private(struct vl_screen *vscreen)
 302 {
 303    return vscreen;
 304 }
 305
 306 static xcb_screen_t *
 307 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 308 {
 309     for (; iter.rem; --screen, xcb_screen_next(&iter))
 310         if (screen == 0)
 311             return iter.data;
 312
 313     return NULL;
 314 }
 315
 316 struct vl_screen *
 317 vl_dri2_screen_create(Display *display, int screen)
 318 {
 319    struct vl_dri_screen *scrn;
 320    const xcb_query_extension_reply_t *extension;
 321    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 322    xcb_dri2_query_version_reply_t *dri2_query = NULL;
 323    xcb_dri2_connect_cookie_t connect_cookie;
 324    xcb_dri2_connect_reply_t *connect = NULL;
 325    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 326    xcb_dri2_authenticate_reply_t *authenticate = NULL;
 327    xcb_screen_iterator_t s;
 328    xcb_generic_error_t *error = NULL;
 329    char *device_name;
 330    int fd, device_name_length;
 331    unsigned driverType;
 332
 333    drm_magic_t magic;
 334
 335    assert(display);
 336
 337    scrn = CALLOC_STRUCT(vl_dri_screen);
 338    if (!scrn)
 339       return NULL;
 340
 341    scrn->conn = XGetXCBConnection(display);
 342    if (!scrn->conn)
 343       goto free_screen;
 344
 345    xcb_prefetch_extension_data(scrn->conn, &xcb_dri2_id);
 346
 347    extension = xcb_get_extension_data(scrn->conn, &xcb_dri2_id);
 348    if (!(extension && extension->present))
 349       goto free_screen;
 350
 351    dri2_query_cookie = xcb_dri2_query_version (scrn->conn,
 352                                                XCB_DRI2_MAJOR_VERSION,
 353                                                XCB_DRI2_MINOR_VERSION);
 354    dri2_query = xcb_dri2_query_version_reply (scrn->conn, dri2_query_cookie, &error);
 355    if (dri2_query == NULL || error != NULL || dri2_query->minor_version < 2)
 356       goto free_query;
 357
 358    s = xcb_setup_roots_iterator(xcb_get_setup(scrn->conn));
 359
 360    driverType = XCB_DRI2_DRIVER_TYPE_DRI;
 361 #ifdef DRI2DriverPrimeShift
 362    {
 363       char *prime = getenv("DRI_PRIME");
 364       if (prime) {
 365          unsigned primeid;
 366          errno = 0;
 367          primeid = strtoul(prime, NULL, 0);
 368          if (errno == 0)
 369             driverType |=
 370                ((primeid & DRI2DriverPrimeMask) << DRI2DriverPrimeShift);
 371       }
 372    }
 373 #endif
 374
 375    connect_cookie = xcb_dri2_connect_unchecked(scrn->conn,
 376                                                get_xcb_screen(s, screen)->root,
 377                                                driverType);
 378    connect = xcb_dri2_connect_reply(scrn->conn, connect_cookie, NULL);
 379    if (connect == NULL ||
 380        connect->driver_name_length + connect->device_name_length == 0)
 381       goto free_connect;
 382
 383    device_name_length = xcb_dri2_connect_device_name_length(connect);
 384    device_name = CALLOC(1, device_name_length + 1);
 385    if (!device_name)
 386       goto free_connect;
 387    memcpy(device_name, xcb_dri2_connect_device_name(connect), device_name_length);
 388    fd = loader_open_device(device_name);
 389    free(device_name);
 390
 391    if (fd < 0)
 392       goto free_connect;
 393
 394    if (drmGetMagic(fd, &magic))
 395       goto close_fd;
 396
 397    authenticate_cookie = xcb_dri2_authenticate_unchecked(scrn->conn,
 398                                                          get_xcb_screen(s, screen)->root,
 399                                                          magic);
 400    authenticate = xcb_dri2_authenticate_reply(scrn->conn, authenticate_cookie, NULL);
 401
 402    if (authenticate == NULL || !authenticate->authenticated)
 403       goto free_authenticate;
 404
 405    if (pipe_loader_drm_probe_fd(&scrn->base.dev, fd))
 406       scrn->base.pscreen = pipe_loader_create_screen(scrn->base.dev);
 407
 408    if (!scrn->base.pscreen)
 409       goto release_pipe;
 410
 411    scrn->base.destroy = vl_dri2_screen_destroy;
 412    scrn->base.texture_from_drawable = vl_dri2_screen_texture_from_drawable;
 413    scrn->base.get_dirty_area = vl_dri2_screen_get_dirty_area;
 414    scrn->base.get_timestamp = vl_dri2_screen_get_timestamp;
 415    scrn->base.set_next_timestamp = vl_dri2_screen_set_next_timestamp;
 416    scrn->base.get_private = vl_dri2_screen_get_private;
 417    scrn->base.pscreen->flush_frontbuffer = vl_dri2_flush_frontbuffer;
 418    vl_compositor_reset_dirty_area(&scrn->dirty_areas[0]);
 419    vl_compositor_reset_dirty_area(&scrn->dirty_areas[1]);
 420
 421    free(authenticate);
 422    free(connect);
 423    free(dri2_query);
 424    free(error);
 425
 426    return &scrn->base;
 427
 428 release_pipe:
 429    if (scrn->base.dev)
 430       pipe_loader_release(&scrn->base.dev, 1);
 431    fd = -1;
 432 free_authenticate:
 433    free(authenticate);
 434 close_fd:
 435    close(fd);
 436 free_connect:
 437    free(connect);
 438 free_query:
 439    free(dri2_query);
 440    free(error);
 441
 442 free_screen:
 443    FREE(scrn);
 444    return NULL;
 445 }
 446
 447 static void
 448 vl_dri2_screen_destroy(struct vl_screen *vscreen)
 449 {
 450    struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
 451
 452    assert(vscreen);
 453
 454    if (scrn->flushed) {
 455       free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
 456       free(xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL));
 457       free(xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL));
 458    }
 459
 460    vl_dri2_destroy_drawable(scrn);
 461    scrn->base.pscreen->destroy(scrn->base.pscreen);
 462    pipe_loader_release(&scrn->base.dev, 1);
 463    FREE(scrn);
 464 }