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_context.h"
  25 #include "virgl_resource.h"
  26 #include "virgl_screen.h"
  27
  28 bool virgl_res_needs_flush_wait(struct virgl_context *vctx,
  29                                 struct virgl_resource *res,
  30                                 unsigned usage)
  31 {
  32    struct virgl_screen *vs = virgl_screen(vctx->base.screen);
  33
  34    if ((!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) && vs->vws->res_is_referenced(vs->vws, vctx->cbuf, res->hw_res)) {
  35       return true;
  36    }
  37    return false;
  38 }
  39
  40 bool virgl_res_needs_readback(struct virgl_context *vctx,
  41                               struct virgl_resource *res,
  42                               unsigned usage)
  43 {
  44    bool readback = true;
  45    if (res->clean)
  46       readback = false;
  47    else if (usage & PIPE_TRANSFER_DISCARD_RANGE)
  48       readback = false;
  49    else if ((usage & (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT)) ==
  50             (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT))
  51       readback = false;
  52    return readback;
  53 }
  54
  55 static struct pipe_resource *virgl_resource_create(struct pipe_screen *screen,
  56                                                    const struct pipe_resource *templ)
  57 {
  58     struct virgl_screen *vs = virgl_screen(screen);
  59     if (templ->target == PIPE_BUFFER)
  60         return virgl_buffer_create(vs, templ);
  61     else
  62         return virgl_texture_create(vs, templ);
  63 }
  64
  65 static struct pipe_resource *virgl_resource_from_handle(struct pipe_screen *screen,
  66                                                         const struct pipe_resource *templ,
  67                                                         struct winsys_handle *whandle,
  68                                                         unsigned usage)
  69 {
  70     struct virgl_screen *vs = virgl_screen(screen);
  71     if (templ->target == PIPE_BUFFER)
  72         return NULL;
  73     else
  74         return virgl_texture_from_handle(vs, templ, whandle);
  75 }
  76
  77 void virgl_init_screen_resource_functions(struct pipe_screen *screen)
  78 {
  79     screen->resource_create = virgl_resource_create;
  80     screen->resource_from_handle = virgl_resource_from_handle;
  81     screen->resource_get_handle = u_resource_get_handle_vtbl;
  82     screen->resource_destroy = u_resource_destroy_vtbl;
  83 }
  84
  85 static void virgl_buffer_subdata(struct pipe_context *pipe,
  86                                  struct pipe_resource *resource,
  87                                  unsigned usage, unsigned offset,
  88                                  unsigned size, const void *data)
  89 {
  90    struct pipe_box box;
  91
  92    if (offset == 0 && size == resource->width0)
  93       usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
  94    else
  95       usage |= PIPE_TRANSFER_DISCARD_RANGE;
  96
  97    u_box_1d(offset, size, &box);
  98    virgl_transfer_inline_write(pipe, resource, 0, usage, &box, data, 0, 0);
  99 }
 100
 101 void virgl_init_context_resource_functions(struct pipe_context *ctx)
 102 {
 103     ctx->transfer_map = u_transfer_map_vtbl;
 104     ctx->transfer_flush_region = u_transfer_flush_region_vtbl;
 105     ctx->transfer_unmap = u_transfer_unmap_vtbl;
 106     ctx->buffer_subdata = virgl_buffer_subdata;
 107     ctx->texture_subdata = u_default_texture_subdata;
 108 }