src/gallium/drivers/r600/r600_buffer.c

   1 /*
   2  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
   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:
  24  *      Jerome Glisse
  25  *      Corbin Simpson <MostAwesomeDude@gmail.com>
  26  */
  27 #include "r600_pipe.h"
  28 #include "util/u_upload_mgr.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_surface.h"
  31
  32 static void r600_buffer_destroy(struct pipe_screen *screen,
  33                                 struct pipe_resource *buf)
  34 {
  35         struct r600_resource *rbuffer = r600_resource(buf);
  36
  37         util_range_destroy(&rbuffer->valid_buffer_range);
  38         pb_reference(&rbuffer->buf, NULL);
  39         FREE(rbuffer);
  40 }
  41
  42 static void *r600_buffer_get_transfer(struct pipe_context *ctx,
  43                                       struct pipe_resource *resource,
  44                                       unsigned level,
  45                                       unsigned usage,
  46                                       const struct pipe_box *box,
  47                                       struct pipe_transfer **ptransfer,
  48                                       void *data, struct r600_resource *staging,
  49                                       unsigned offset)
  50 {
  51         struct r600_context *rctx = (struct r600_context*)ctx;
  52         struct r600_transfer *transfer = util_slab_alloc(&rctx->pool_transfers);
  53
  54         transfer->transfer.resource = resource;
  55         transfer->transfer.level = level;
  56         transfer->transfer.usage = usage;
  57         transfer->transfer.box = *box;
  58         transfer->transfer.stride = 0;
  59         transfer->transfer.layer_stride = 0;
  60         transfer->offset = offset;
  61         transfer->staging = staging;
  62         *ptransfer = &transfer->transfer;
  63         return data;
  64 }
  65
  66 static void *r600_buffer_transfer_map(struct pipe_context *ctx,
  67                                         struct pipe_resource *resource,
  68                                         unsigned level,
  69                                         unsigned usage,
  70                                         const struct pipe_box *box,
  71                                         struct pipe_transfer **ptransfer)
  72 {
  73         struct r600_context *rctx = (struct r600_context*)ctx;
  74         struct r600_resource *rbuffer = r600_resource(resource);
  75         uint8_t *data;
  76
  77         assert(box->x + box->width <= resource->width0);
  78
  79         /* See if the buffer range being mapped has never been initialized,
  80          * in which case it can be mapped unsynchronized. */
  81         if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
  82             usage & PIPE_TRANSFER_WRITE &&
  83             !util_ranges_intersect(&rbuffer->valid_buffer_range, box->x, box->x + box->width)) {
  84                 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
  85         }
  86
  87         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
  88             !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
  89                 assert(usage & PIPE_TRANSFER_WRITE);
  90
  91                 /* Check if mapping this buffer would cause waiting for the GPU. */
  92                 if (r600_rings_is_buffer_referenced(&rctx->b, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
  93                     rctx->b.ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
  94                         rctx->b.invalidate_buffer(&rctx->b.b, &rbuffer->b.b);
  95                 }
  96         }
  97         else if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
  98                  !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
  99                  !(rctx->screen->b.debug_flags & DBG_NO_DISCARD_RANGE) &&
 100                  (rctx->screen->b.has_cp_dma ||
 101                   (rctx->screen->b.has_streamout &&
 102                    /* The buffer range must be aligned to 4 with streamout. */
 103                    box->x % 4 == 0 && box->width % 4 == 0))) {
 104                 assert(usage & PIPE_TRANSFER_WRITE);
 105
 106                 /* Check if mapping this buffer would cause waiting for the GPU. */
 107                 if (r600_rings_is_buffer_referenced(&rctx->b, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 108                     rctx->b.ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
 109                         /* Do a wait-free write-only transfer using a temporary buffer. */
 110                         unsigned offset;
 111                         struct r600_resource *staging = NULL;
 112
 113                         u_upload_alloc(rctx->uploader, 0, box->width + (box->x % R600_MAP_BUFFER_ALIGNMENT),
 114                                        &offset, (struct pipe_resource**)&staging, (void**)&data);
 115
 116                         if (staging) {
 117                                 data += box->x % R600_MAP_BUFFER_ALIGNMENT;
 118                                 return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 119                                                                 ptransfer, data, staging, offset);
 120                         }
 121                 }
 122         }
 123
 124         /* mmap and synchronize with rings */
 125         data = r600_buffer_map_sync_with_rings(&rctx->b, rbuffer, usage);
 126         if (!data) {
 127                 return NULL;
 128         }
 129         data += box->x;
 130
 131         return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 132                                         ptransfer, data, NULL, 0);
 133 }
 134
 135 static void r600_buffer_transfer_unmap(struct pipe_context *pipe,
 136                                         struct pipe_transfer *transfer)
 137 {
 138         struct r600_context *rctx = (struct r600_context*)pipe;
 139         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 140         struct r600_resource *rbuffer = r600_resource(transfer->resource);
 141
 142         if (rtransfer->staging) {
 143                 struct pipe_resource *dst, *src;
 144                 unsigned soffset, doffset, size;
 145                 struct pipe_box box;
 146
 147                 dst = transfer->resource;
 148                 src = &rtransfer->staging->b.b;
 149                 size = transfer->box.width;
 150                 doffset = transfer->box.x;
 151                 soffset = rtransfer->offset + transfer->box.x % R600_MAP_BUFFER_ALIGNMENT;
 152
 153                 u_box_1d(soffset, size, &box);
 154
 155                 /* Copy the staging buffer into the original one. */
 156                 if (!(size % 4) && !(doffset % 4) && !(soffset % 4) &&
 157                     rctx->b.dma_copy(pipe, dst, 0, doffset, 0, 0, src, 0, &box)) {
 158                         /* DONE. */
 159                 } else {
 160                         pipe->resource_copy_region(pipe, dst, 0, doffset, 0, 0, src, 0, &box);
 161                 }
 162                 pipe_resource_reference((struct pipe_resource**)&rtransfer->staging, NULL);
 163         }
 164
 165         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 166                 util_range_add(&rbuffer->valid_buffer_range, transfer->box.x,
 167                                transfer->box.x + transfer->box.width);
 168         }
 169         util_slab_free(&rctx->pool_transfers, transfer);
 170 }
 171
 172 static const struct u_resource_vtbl r600_buffer_vtbl =
 173 {
 174         u_default_resource_get_handle,          /* get_handle */
 175         r600_buffer_destroy,                    /* resource_destroy */
 176         r600_buffer_transfer_map,               /* transfer_map */
 177         NULL,                                   /* transfer_flush_region */
 178         r600_buffer_transfer_unmap,             /* transfer_unmap */
 179         NULL                                    /* transfer_inline_write */
 180 };
 181
 182 struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 183                                          const struct pipe_resource *templ,
 184                                          unsigned alignment)
 185 {
 186         struct r600_screen *rscreen = (struct r600_screen*)screen;
 187         struct r600_resource *rbuffer;
 188
 189         rbuffer = MALLOC_STRUCT(r600_resource);
 190
 191         rbuffer->b.b = *templ;
 192         pipe_reference_init(&rbuffer->b.b.reference, 1);
 193         rbuffer->b.b.screen = screen;
 194         rbuffer->b.vtbl = &r600_buffer_vtbl;
 195         util_range_init(&rbuffer->valid_buffer_range);
 196
 197         if (!r600_init_resource(&rscreen->b, rbuffer, templ->width0, alignment, TRUE, templ->usage)) {
 198                 FREE(rbuffer);
 199                 return NULL;
 200         }
 201         return &rbuffer->b.b;
 202 }