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_inlines.h"
  24 #include "util/u_memory.h"
  25 #include "virgl_context.h"
  26 #include "virgl_encode.h"
  27 #include "virgl_protocol.h"
  28 #include "virgl_resource.h"
  29
  30 static struct pipe_stream_output_target *virgl_create_so_target(
  31    struct pipe_context *ctx,
  32    struct pipe_resource *buffer,
  33    unsigned buffer_offset,
  34    unsigned buffer_size)
  35 {
  36    struct virgl_context *vctx = virgl_context(ctx);
  37    struct virgl_resource *res = virgl_resource(buffer);
  38    struct virgl_so_target *t = CALLOC_STRUCT(virgl_so_target);
  39    uint32_t handle;
  40
  41    if (!t)
  42       return NULL;
  43    handle = virgl_object_assign_handle();
  44
  45    t->base.reference.count = 1;
  46    t->base.context = ctx;
  47    pipe_resource_reference(&t->base.buffer, buffer);
  48    t->base.buffer_offset = buffer_offset;
  49    t->base.buffer_size = buffer_size;
  50    t->handle = handle;
  51
  52    res->bind_history |= PIPE_BIND_STREAM_OUTPUT;
  53    util_range_add(&res->valid_buffer_range, buffer_offset,
  54                   buffer_offset + buffer_size);
  55    virgl_resource_dirty(res, 0);
  56
  57    virgl_encoder_create_so_target(vctx, handle, res, buffer_offset, buffer_size);
  58    return &t->base;
  59 }
  60
  61 static void virgl_destroy_so_target(struct pipe_context *ctx,
  62                                    struct pipe_stream_output_target *target)
  63 {
  64    struct virgl_context *vctx = virgl_context(ctx);
  65    struct virgl_so_target *t = virgl_so_target(target);
  66
  67    pipe_resource_reference(&t->base.buffer, NULL);
  68    virgl_encode_delete_object(vctx, t->handle, VIRGL_OBJECT_STREAMOUT_TARGET);
  69    FREE(t);
  70 }
  71
  72 static void virgl_set_so_targets(struct pipe_context *ctx,
  73                                 unsigned num_targets,
  74                                 struct pipe_stream_output_target **targets,
  75                                 const unsigned *offset)
  76 {
  77    struct virgl_context *vctx = virgl_context(ctx);
  78    int i;
  79    for (i = 0; i < num_targets; i++) {
  80       if (targets[i]) {
  81          struct virgl_winsys *vws = virgl_screen(vctx->base.screen)->vws;
  82          struct virgl_resource *res = virgl_resource(targets[i]->buffer);
  83
  84          pipe_resource_reference(&vctx->so_targets[i].base.buffer, targets[i]->buffer);
  85
  86          vws->emit_res(vws, vctx->cbuf, res->hw_res, FALSE);
  87       } else {
  88          pipe_resource_reference(&vctx->so_targets[i].base.buffer, NULL);
  89       }
  90    }
  91    for (i = num_targets; i < vctx->num_so_targets; i++)
  92       pipe_resource_reference(&vctx->so_targets[i].base.buffer, NULL);
  93    vctx->num_so_targets = num_targets;
  94    virgl_encoder_set_so_targets(vctx, num_targets, targets, 0);//append_bitmask);
  95 }
  96
  97 void virgl_init_so_functions(struct virgl_context *vctx)
  98 {
  99    vctx->base.create_stream_output_target = virgl_create_so_target;
 100    vctx->base.stream_output_target_destroy = virgl_destroy_so_target;
 101    vctx->base.set_stream_output_targets = virgl_set_so_targets;
 102 }