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, const 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, 4,
  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_resource *rbuf = r300_resource(buf);
  57
  58     align_free(rbuf->malloced_buffer);
  59
  60     if (rbuf->buf)
  61         pb_reference(&rbuf->buf, NULL);
  62
  63     FREE(rbuf);
  64 }
  65
  66 static void *
  67 r300_buffer_transfer_map( struct pipe_context *context,
  68                           struct pipe_resource *resource,
  69                           unsigned level,
  70                           unsigned usage,
  71                           const struct pipe_box *box,
  72                           struct pipe_transfer **ptransfer )
  73 {
  74     struct r300_context *r300 = r300_context(context);
  75     struct radeon_winsys *rws = r300->screen->rws;
  76     struct r300_resource *rbuf = r300_resource(resource);
  77     struct pipe_transfer *transfer;
  78     uint8_t *map;
  79
  80     transfer = slab_alloc(&r300->pool_transfers);
  81     transfer->resource = resource;
  82     transfer->level = level;
  83     transfer->usage = usage;
  84     transfer->box = *box;
  85     transfer->stride = 0;
  86     transfer->layer_stride = 0;
  87
  88     if (rbuf->malloced_buffer) {
  89         *ptransfer = transfer;
  90         return rbuf->malloced_buffer + box->x;
  91     }
  92
  93     if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
  94         !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
  95         assert(usage & PIPE_TRANSFER_WRITE);
  96
  97         /* Check if mapping this buffer would cause waiting for the GPU. */
  98         if (r300->rws->cs_is_buffer_referenced(r300->cs, rbuf->buf, RADEON_USAGE_READWRITE) ||
  99             !r300->rws->buffer_wait(rbuf->buf, 0, RADEON_USAGE_READWRITE)) {
 100             unsigned i;
 101             struct pb_buffer *new_buf;
 102
 103             /* Create a new one in the same pipe_resource. */
 104             new_buf = r300->rws->buffer_create(r300->rws, rbuf->b.b.width0,
 105                                                R300_BUFFER_ALIGNMENT,
 106                                                rbuf->domain,
 107                                                RADEON_FLAG_NO_INTERPROCESS_SHARING);
 108             if (new_buf) {
 109                 /* Discard the old buffer. */
 110                 pb_reference(&rbuf->buf, NULL);
 111                 rbuf->buf = new_buf;
 112
 113                 /* We changed the buffer, now we need to bind it where the old one was bound. */
 114                 for (i = 0; i < r300->nr_vertex_buffers; i++) {
 115                     if (r300->vertex_buffer[i].buffer.resource == &rbuf->b.b) {
 116                         r300->vertex_arrays_dirty = TRUE;
 117                         break;
 118                     }
 119                 }
 120             }
 121         }
 122     }
 123
 124     /* Buffers are never used for write, therefore mapping for read can be
 125      * unsynchronized. */
 126     if (!(usage & PIPE_TRANSFER_WRITE)) {
 127        usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 128     }
 129
 130     map = rws->buffer_map(rbuf->buf, r300->cs, usage);
 131
 132     if (!map) {
 133         slab_free(&r300->pool_transfers, transfer);
 134         return NULL;
 135     }
 136
 137     *ptransfer = transfer;
 138     return map + box->x;
 139 }
 140
 141 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
 142                                         struct pipe_transfer *transfer )
 143 {
 144     struct r300_context *r300 = r300_context(pipe);
 145
 146     slab_free(&r300->pool_transfers, transfer);
 147 }
 148
 149 static const struct u_resource_vtbl r300_buffer_vtbl =
 150 {
 151    NULL,                               /* get_handle */
 152    r300_buffer_destroy,                /* resource_destroy */
 153    r300_buffer_transfer_map,           /* transfer_map */
 154    NULL,                               /* transfer_flush_region */
 155    r300_buffer_transfer_unmap,         /* transfer_unmap */
 156 };
 157
 158 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
 159                                          const struct pipe_resource *templ)
 160 {
 161     struct r300_screen *r300screen = r300_screen(screen);
 162     struct r300_resource *rbuf;
 163
 164     rbuf = MALLOC_STRUCT(r300_resource);
 165
 166     rbuf->b.b = *templ;
 167     rbuf->b.vtbl = &r300_buffer_vtbl;
 168     pipe_reference_init(&rbuf->b.b.reference, 1);
 169     rbuf->b.b.screen = screen;
 170     rbuf->domain = RADEON_DOMAIN_GTT;
 171     rbuf->buf = NULL;
 172     rbuf->malloced_buffer = NULL;
 173
 174     /* Allocate constant buffers and SWTCL vertex and index buffers in RAM.
 175      * Note that uploaded index buffers use the flag PIPE_BIND_CUSTOM, so that
 176      * we can distinguish them from user-created buffers.
 177      */
 178     if (templ->bind & PIPE_BIND_CONSTANT_BUFFER ||
 179         (!r300screen->caps.has_tcl && !(templ->bind & PIPE_BIND_CUSTOM))) {
 180         rbuf->malloced_buffer = align_malloc(templ->width0, 64);
 181         return &rbuf->b.b;
 182     }
 183
 184     rbuf->buf =
 185         r300screen->rws->buffer_create(r300screen->rws, rbuf->b.b.width0,
 186                                        R300_BUFFER_ALIGNMENT,
 187                                        rbuf->domain,
 188                                        RADEON_FLAG_NO_INTERPROCESS_SHARING);
 189     if (!rbuf->buf) {
 190         FREE(rbuf);
 191         return NULL;
 192     }
 193     return &rbuf->b.b;
 194 }