src/gallium/drivers/r300/r300_screen_buffer.c

   1 /*
   2  * Copyright 2010 Red Hat Inc.
   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  * Authors: Dave Airlie
  24  */
  25
  26 #include <stdio.h>
  27
  28 #include "util/u_inlines.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_upload_mgr.h"
  31 #include "util/u_math.h"
  32
  33 #include "r300_screen_buffer.h"
  34
  35 void r300_upload_index_buffer(struct r300_context *r300,
  36                               struct pipe_resource **index_buffer,
  37                               unsigned index_size, unsigned *start,
  38                               unsigned count, uint8_t *ptr)
  39 {
  40     unsigned index_offset;
  41
  42     *index_buffer = NULL;
  43
  44     u_upload_data(r300->uploader,
  45                   0, count * index_size,
  46                   ptr + (*start * index_size),
  47                   &index_offset,
  48                   index_buffer);
  49
  50     *start = index_offset / index_size;
  51 }
  52
  53 static void r300_buffer_destroy(struct pipe_screen *screen,
  54                                 struct pipe_resource *buf)
  55 {
  56     struct r300_screen *r300screen = r300_screen(screen);
  57     struct r300_resource *rbuf = r300_resource(buf);
  58
  59     if (rbuf->constant_buffer)
  60         FREE(rbuf->constant_buffer);
  61
  62     if (rbuf->buf)
  63         pb_reference(&rbuf->buf, NULL);
  64
  65     util_slab_free(&r300screen->pool_buffers, rbuf);
  66 }
  67
  68 static struct pipe_transfer*
  69 r300_buffer_get_transfer(struct pipe_context *context,
  70                          struct pipe_resource *resource,
  71                          unsigned level,
  72                          unsigned usage,
  73                          const struct pipe_box *box)
  74 {
  75    struct r300_context *r300 = r300_context(context);
  76    struct pipe_transfer *transfer =
  77          util_slab_alloc(&r300->pool_transfers);
  78
  79    transfer->resource = resource;
  80    transfer->level = level;
  81    transfer->usage = usage;
  82    transfer->box = *box;
  83    transfer->stride = 0;
  84    transfer->layer_stride = 0;
  85    transfer->data = NULL;
  86
  87    /* Note strides are zero, this is ok for buffers, but not for
  88     * textures 2d & higher at least.
  89     */
  90    return transfer;
  91 }
  92
  93 static void r300_buffer_transfer_destroy(struct pipe_context *pipe,
  94                                          struct pipe_transfer *transfer)
  95 {
  96    struct r300_context *r300 = r300_context(pipe);
  97    util_slab_free(&r300->pool_transfers, transfer);
  98 }
  99
 100 static void *
 101 r300_buffer_transfer_map( struct pipe_context *pipe,
 102                           struct pipe_transfer *transfer )
 103 {
 104     struct r300_context *r300 = r300_context(pipe);
 105     struct r300_screen *r300screen = r300_screen(pipe->screen);
 106     struct radeon_winsys *rws = r300screen->rws;
 107     struct r300_resource *rbuf = r300_resource(transfer->resource);
 108     uint8_t *map;
 109     enum pipe_transfer_usage usage;
 110
 111     if (rbuf->b.b.user_ptr)
 112         return rbuf->b.b.user_ptr + transfer->box.x;
 113     if (rbuf->constant_buffer)
 114         return (uint8_t *) rbuf->constant_buffer + transfer->box.x;
 115
 116     /* Buffers are never used for write, therefore mapping for read can be
 117      * unsynchronized. */
 118     usage = transfer->usage;
 119     if (!(usage & PIPE_TRANSFER_WRITE)) {
 120        usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 121     }
 122
 123     map = rws->buffer_map(rbuf->cs_buf, r300->cs, usage);
 124
 125     if (map == NULL)
 126         return NULL;
 127
 128     return map + transfer->box.x;
 129 }
 130
 131 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 132                             struct pipe_transfer *transfer )
 133 {
 134     struct r300_screen *r300screen = r300_screen(pipe->screen);
 135     struct radeon_winsys *rws = r300screen->rws;
 136     struct r300_resource *rbuf = r300_resource(transfer->resource);
 137
 138     if (rbuf->cs_buf) {
 139         rws->buffer_unmap(rbuf->cs_buf);
 140     }
 141 }
 142
 143 static const struct u_resource_vtbl r300_buffer_vtbl =
 144 {
 145    NULL,                               /* get_handle */
 146    r300_buffer_destroy,                /* resource_destroy */
 147    r300_buffer_get_transfer,           /* get_transfer */
 148    r300_buffer_transfer_destroy,       /* transfer_destroy */
 149    r300_buffer_transfer_map,           /* transfer_map */
 150    NULL,                               /* transfer_flush_region */
 151    r300_buffer_transfer_unmap,         /* transfer_unmap */
 152    NULL   /* transfer_inline_write */
 153 };
 154
 155 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 156                                          const struct pipe_resource *templ)
 157 {
 158     struct r300_screen *r300screen = r300_screen(screen);
 159     struct r300_resource *rbuf;
 160     unsigned alignment = 16;
 161
 162     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 163
 164     rbuf->b.b = *templ;
 165     rbuf->b.vtbl = &r300_buffer_vtbl;
 166     pipe_reference_init(&rbuf->b.b.reference, 1);
 167     rbuf->b.b.screen = screen;
 168     rbuf->b.b.user_ptr = NULL;
 169     rbuf->domain = RADEON_DOMAIN_GTT;
 170     rbuf->buf = NULL;
 171     rbuf->constant_buffer = NULL;
 172
 173     /* Alloc constant buffers in RAM. */
 174     if (templ->bind & PIPE_BIND_CONSTANT_BUFFER) {
 175         rbuf->constant_buffer = MALLOC(templ->width0);
 176         return &rbuf->b.b;
 177     }
 178
 179     rbuf->buf =
 180         r300screen->rws->buffer_create(r300screen->rws,
 181                                        rbuf->b.b.width0, alignment,
 182                                        rbuf->b.b.bind, rbuf->domain);
 183     if (!rbuf->buf) {
 184         util_slab_free(&r300screen->pool_buffers, rbuf);
 185         return NULL;
 186     }
 187
 188     rbuf->cs_buf =
 189         r300screen->rws->buffer_get_cs_handle(rbuf->buf);
 190
 191     return &rbuf->b.b;
 192 }
 193
 194 struct pipe_resource *r300_user_buffer_create(struct pipe_screen *screen,
 195                                               void *ptr, unsigned size,
 196                                               unsigned bind)
 197 {
 198     struct r300_screen *r300screen = r300_screen(screen);
 199     struct r300_resource *rbuf;
 200
 201     rbuf = util_slab_alloc(&r300screen->pool_buffers);
 202
 203     pipe_reference_init(&rbuf->b.b.reference, 1);
 204     rbuf->b.b.screen = screen;
 205     rbuf->b.b.target = PIPE_BUFFER;
 206     rbuf->b.b.format = PIPE_FORMAT_R8_UNORM;
 207     rbuf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 208     rbuf->b.b.bind = bind;
 209     rbuf->b.b.width0 = ~0;
 210     rbuf->b.b.height0 = 1;
 211     rbuf->b.b.depth0 = 1;
 212     rbuf->b.b.array_size = 1;
 213     rbuf->b.b.flags = 0;
 214     rbuf->b.b.user_ptr = ptr;
 215     rbuf->b.vtbl = &r300_buffer_vtbl;
 216     rbuf->domain = RADEON_DOMAIN_GTT;
 217     rbuf->buf = NULL;
 218     rbuf->constant_buffer = NULL;
 219     return &rbuf->b.b;
 220 }