virgl_buffer.c revision 01e04c3f 
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
24#include "util/u_inlines.h"
25#include "util/u_memory.h"
26#include "virgl_context.h"
27#include "virgl_resource.h"
28#include "virgl_screen.h"
29
30static void virgl_buffer_destroy(struct pipe_screen *screen,
31                                 struct pipe_resource *buf)
32{
33   struct virgl_screen *vs = virgl_screen(screen);
34   struct virgl_buffer *vbuf = virgl_buffer(buf);
35
36   util_range_destroy(&vbuf->valid_buffer_range);
37   vs->vws->resource_unref(vs->vws, vbuf->base.hw_res);
38   FREE(vbuf);
39}
40
41static void *virgl_buffer_transfer_map(struct pipe_context *ctx,
42                                       struct pipe_resource *resource,
43                                       unsigned level,
44                                       unsigned usage,
45                                       const struct pipe_box *box,
46                                       struct pipe_transfer **transfer)
47{
48   struct virgl_context *vctx = virgl_context(ctx);
49   struct virgl_screen *vs = virgl_screen(ctx->screen);
50   struct virgl_buffer *vbuf = virgl_buffer(resource);
51   struct virgl_transfer *trans;
52   void *ptr;
53   bool readback;
54   uint32_t offset;
55   bool doflushwait = false;
56
57   if ((usage & PIPE_TRANSFER_READ) && (vbuf->on_list == TRUE))
58      doflushwait = true;
59   else
60      doflushwait = virgl_res_needs_flush_wait(vctx, &vbuf->base, usage);
61
62   if (doflushwait)
63      ctx->flush(ctx, NULL, 0);
64
65   trans = slab_alloc(&vctx->texture_transfer_pool);
66   if (!trans)
67      return NULL;
68
69   trans->base.resource = resource;
70   trans->base.level = level;
71   trans->base.usage = usage;
72   trans->base.box = *box;
73   trans->base.stride = 0;
74   trans->base.layer_stride = 0;
75
76   offset = box->x;
77
78   readback = virgl_res_needs_readback(vctx, &vbuf->base, usage);
79   if (readback)
80      vs->vws->transfer_get(vs->vws, vbuf->base.hw_res, box, trans->base.stride, trans->base.layer_stride, offset, level);
81
82   if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
83      doflushwait = true;
84
85   if (doflushwait || readback)
86      vs->vws->resource_wait(vs->vws, vbuf->base.hw_res);
87
88   ptr = vs->vws->resource_map(vs->vws, vbuf->base.hw_res);
89   if (!ptr) {
90      return NULL;
91   }
92
93   trans->offset = offset;
94   *transfer = &trans->base;
95
96   return ptr + trans->offset;
97}
98
99static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
100                                        struct pipe_transfer *transfer)
101{
102   struct virgl_context *vctx = virgl_context(ctx);
103   struct virgl_transfer *trans = virgl_transfer(transfer);
104   struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
105
106   if (trans->base.usage & PIPE_TRANSFER_WRITE) {
107      if (!(transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT)) {
108         struct virgl_screen *vs = virgl_screen(ctx->screen);
109         vctx->num_transfers++;
110         vs->vws->transfer_put(vs->vws, vbuf->base.hw_res,
111                               &transfer->box, trans->base.stride, trans->base.layer_stride, trans->offset, transfer->level);
112
113      }
114   }
115
116   slab_free(&vctx->texture_transfer_pool, trans);
117}
118
119static void virgl_buffer_transfer_flush_region(struct pipe_context *ctx,
120                                               struct pipe_transfer *transfer,
121                                               const struct pipe_box *box)
122{
123   struct virgl_context *vctx = virgl_context(ctx);
124   struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
125
126   if (!vbuf->on_list) {
127       struct pipe_resource *res = NULL;
128
129       list_addtail(&vbuf->flush_list, &vctx->to_flush_bufs);
130       vbuf->on_list = TRUE;
131       pipe_resource_reference(&res, &vbuf->base.u.b);
132   }
133
134   util_range_add(&vbuf->valid_buffer_range, transfer->box.x + box->x,
135                  transfer->box.x + box->x + box->width);
136
137   vbuf->base.clean = FALSE;
138}
139
140static const struct u_resource_vtbl virgl_buffer_vtbl =
141{
142   u_default_resource_get_handle,            /* get_handle */
143   virgl_buffer_destroy,                     /* resource_destroy */
144   virgl_buffer_transfer_map,                /* transfer_map */
145   virgl_buffer_transfer_flush_region,       /* transfer_flush_region */
146   virgl_buffer_transfer_unmap,              /* transfer_unmap */
147};
148
149struct pipe_resource *virgl_buffer_create(struct virgl_screen *vs,
150                                          const struct pipe_resource *template)
151{
152   struct virgl_buffer *buf;
153   uint32_t size;
154   uint32_t vbind;
155   buf = CALLOC_STRUCT(virgl_buffer);
156   buf->base.clean = TRUE;
157   buf->base.u.b = *template;
158   buf->base.u.b.screen = &vs->base;
159   buf->base.u.vtbl = &virgl_buffer_vtbl;
160   pipe_reference_init(&buf->base.u.b.reference, 1);
161   util_range_init(&buf->valid_buffer_range);
162
163   vbind = pipe_to_virgl_bind(template->bind);
164   size = template->width0;
165
166   /* SSBOs and texture buffers can written to by host compute shaders. */
167   if (vbind == VIRGL_BIND_SHADER_BUFFER || vbind == VIRGL_BIND_SAMPLER_VIEW)
168      buf->base.clean = FALSE;
169   buf->base.hw_res = vs->vws->resource_create(vs->vws, template->target, template->format, vbind, template->width0, 1, 1, 1, 0, 0, size);
170
171   util_range_set_empty(&buf->valid_buffer_range);
172   return &buf->base.u.b;
173}
174