src/gallium/drivers/virgl/virgl_resource.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23 #include "util/u_inlines.h"
  24 #include "virgl_resource.h"
  25 #include "virgl_context.h"
  26
  27 bool virgl_res_needs_flush_wait(struct virgl_context *vctx,
  28                                 struct virgl_resource *res,
  29                                 unsigned usage)
  30 {
  31    struct virgl_screen *vs = virgl_screen(vctx->base.screen);
  32
  33    if ((!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) && vs->vws->res_is_referenced(vs->vws, vctx->cbuf, res->hw_res)) {
  34       return true;
  35    }
  36    return false;
  37 }
  38
  39 bool virgl_res_needs_readback(struct virgl_context *vctx,
  40                               struct virgl_resource *res,
  41                               unsigned usage)
  42 {
  43    bool readback = true;
  44    if (res->clean)
  45       readback = false;
  46    else if (usage & PIPE_TRANSFER_DISCARD_RANGE)
  47       readback = false;
  48    else if ((usage & (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT)) ==
  49             (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT))
  50       readback = false;
  51    return readback;
  52 }
  53
  54 static struct pipe_resource *virgl_resource_create(struct pipe_screen *screen,
  55                                                    const struct pipe_resource *templ)
  56 {
  57     struct virgl_screen *vs = virgl_screen(screen);
  58     if (templ->target == PIPE_BUFFER)
  59         return virgl_buffer_create(vs, templ);
  60     else
  61         return virgl_texture_create(vs, templ);
  62 }
  63
  64 static struct pipe_resource *virgl_resource_from_handle(struct pipe_screen *screen,
  65                                                         const struct pipe_resource *templ,
  66                                                         struct winsys_handle *whandle)
  67 {
  68     struct virgl_screen *vs = virgl_screen(screen);
  69     if (templ->target == PIPE_BUFFER)
  70         return NULL;
  71     else
  72         return virgl_texture_from_handle(vs, templ, whandle);
  73 }
  74
  75 void virgl_init_screen_resource_functions(struct pipe_screen *screen)
  76 {
  77     screen->resource_create = virgl_resource_create;
  78     screen->resource_from_handle = virgl_resource_from_handle;
  79     screen->resource_get_handle = u_resource_get_handle_vtbl;
  80     screen->resource_destroy = u_resource_destroy_vtbl;
  81 }
  82
  83 void virgl_init_context_resource_functions(struct pipe_context *ctx)
  84 {
  85     ctx->transfer_map = u_transfer_map_vtbl;
  86     ctx->transfer_flush_region = u_transfer_flush_region_vtbl;
  87     ctx->transfer_unmap = u_transfer_unmap_vtbl;
  88     ctx->transfer_inline_write = u_transfer_inline_write_vtbl;
  89 }