src/gallium/drivers/virgl/virgl_streamout.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_memory.h"
  24 #include "util/u_inlines.h"
  25 #include "virgl_context.h"
  26 #include "virgl_encode.h"
  27 #include "virgl_resource.h"
  28
  29 static struct pipe_stream_output_target *virgl_create_so_target(
  30    struct pipe_context *ctx,
  31    struct pipe_resource *buffer,
  32    unsigned buffer_offset,
  33    unsigned buffer_size)
  34 {
  35    struct virgl_context *vctx = virgl_context(ctx);
  36    struct virgl_resource *res = virgl_resource(buffer);
  37    struct virgl_so_target *t = CALLOC_STRUCT(virgl_so_target);
  38    uint32_t handle;
  39
  40    if (!t)
  41       return NULL;
  42    handle = virgl_object_assign_handle();
  43
  44    t->base.reference.count = 1;
  45    t->base.context = ctx;
  46    pipe_resource_reference(&t->base.buffer, buffer);
  47    t->base.buffer_offset = buffer_offset;
  48    t->base.buffer_size = buffer_size;
  49    t->handle = handle;
  50    res->clean = FALSE;
  51    virgl_encoder_create_so_target(vctx, handle, res, buffer_offset, buffer_size);
  52    return &t->base;
  53 }
  54
  55 static void virgl_destroy_so_target(struct pipe_context *ctx,
  56                                    struct pipe_stream_output_target *target)
  57 {
  58    struct virgl_context *vctx = virgl_context(ctx);
  59    struct virgl_so_target *t = virgl_so_target(target);
  60
  61    pipe_resource_reference(&t->base.buffer, NULL);
  62    virgl_encode_delete_object(vctx, t->handle, VIRGL_OBJECT_STREAMOUT_TARGET);
  63    FREE(t);
  64 }
  65
  66 static void virgl_set_so_targets(struct pipe_context *ctx,
  67                                 unsigned num_targets,
  68                                 struct pipe_stream_output_target **targets,
  69                                 const unsigned *offset)
  70 {
  71    struct virgl_context *vctx = virgl_context(ctx);
  72    int i;
  73    for (i = 0; i < num_targets; i++) {
  74       pipe_resource_reference(&vctx->so_targets[i].base.buffer, targets[i]->buffer);
  75    }
  76    for (i = num_targets; i < vctx->num_so_targets; i++)
  77       pipe_resource_reference(&vctx->so_targets[i].base.buffer, NULL);
  78    vctx->num_so_targets = num_targets;
  79    virgl_encoder_set_so_targets(vctx, num_targets, targets, 0);//append_bitmask);
  80 }
  81
  82 void virgl_init_so_functions(struct virgl_context *vctx)
  83 {
  84    vctx->base.create_stream_output_target = virgl_create_so_target;
  85    vctx->base.stream_output_target_destroy = virgl_destroy_so_target;
  86    vctx->base.set_stream_output_targets = virgl_set_so_targets;
  87 }