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
  31 static void r600_buffer_destroy(struct pipe_screen *screen,
  32                                 struct pipe_resource *buf)
  33 {
  34         struct r600_resource *rbuffer = r600_resource(buf);
  35
  36         pb_reference(&rbuffer->buf, NULL);
  37         FREE(rbuffer);
  38 }
  39
  40 static struct pipe_transfer *r600_get_transfer(struct pipe_context *ctx,
  41                                                struct pipe_resource *resource,
  42                                                unsigned level,
  43                                                unsigned usage,
  44                                                const struct pipe_box *box)
  45 {
  46         struct r600_context *rctx = (struct r600_context*)ctx;
  47         struct r600_transfer *transfer = util_slab_alloc(&rctx->pool_transfers);
  48
  49         assert(box->x + box->width <= resource->width0);
  50
  51         transfer->transfer.resource = resource;
  52         transfer->transfer.level = level;
  53         transfer->transfer.usage = usage;
  54         transfer->transfer.box = *box;
  55         transfer->transfer.stride = 0;
  56         transfer->transfer.layer_stride = 0;
  57         transfer->transfer.data = NULL;
  58         transfer->staging = NULL;
  59         transfer->offset = 0;
  60
  61         /* Note strides are zero, this is ok for buffers, but not for
  62          * textures 2d & higher at least.
  63          */
  64         return &transfer->transfer;
  65 }
  66
  67 static void r600_set_constants_dirty_if_bound(struct r600_context *rctx,
  68                                               struct r600_constbuf_state *state,
  69                                               struct r600_resource *rbuffer)
  70 {
  71         bool found = false;
  72         uint32_t mask = state->enabled_mask;
  73
  74         while (mask) {
  75                 unsigned i = u_bit_scan(&mask);
  76                 if (state->cb[i].buffer == &rbuffer->b.b) {
  77                         found = true;
  78                         state->dirty_mask |= 1 << i;
  79                 }
  80         }
  81         if (found) {
  82                 r600_constant_buffers_dirty(rctx, state);
  83         }
  84 }
  85
  86 static void *r600_buffer_transfer_map(struct pipe_context *pipe,
  87                                       struct pipe_transfer *transfer)
  88 {
  89         struct r600_resource *rbuffer = r600_resource(transfer->resource);
  90         struct r600_context *rctx = (struct r600_context*)pipe;
  91         uint8_t *data;
  92
  93         if (transfer->usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
  94             !(transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
  95                 assert(transfer->usage & PIPE_TRANSFER_WRITE);
  96
  97                 /* Check if mapping this buffer would cause waiting for the GPU. */
  98                 if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
  99                     rctx->ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
 100                         unsigned i, mask;
 101
 102                         /* Discard the buffer. */
 103                         pb_reference(&rbuffer->buf, NULL);
 104
 105                         /* Create a new one in the same pipe_resource. */
 106                         /* XXX We probably want a different alignment for buffers and textures. */
 107                         r600_init_resource(rctx->screen, rbuffer, rbuffer->b.b.width0, 4096,
 108                                            rbuffer->b.b.bind, rbuffer->b.b.usage);
 109
 110                         /* We changed the buffer, now we need to bind it where the old one was bound. */
 111                         /* Vertex buffers. */
 112                         mask = rctx->vertex_buffer_state.enabled_mask;
 113                         while (mask) {
 114                                 i = u_bit_scan(&mask);
 115                                 if (rctx->vertex_buffer_state.vb[i].buffer == &rbuffer->b.b) {
 116                                         rctx->vertex_buffer_state.dirty_mask |= 1 << i;
 117                                         r600_vertex_buffers_dirty(rctx);
 118                                 }
 119                         }
 120                         /* Streamout buffers. */
 121                         for (i = 0; i < rctx->num_so_targets; i++) {
 122                                 if (rctx->so_targets[i]->b.buffer == &rbuffer->b.b) {
 123                                         r600_context_streamout_end(rctx);
 124                                         rctx->streamout_start = TRUE;
 125                                         rctx->streamout_append_bitmask = ~0;
 126                                 }
 127                         }
 128                         /* Constant buffers. */
 129                         r600_set_constants_dirty_if_bound(rctx, &rctx->vs_constbuf_state, rbuffer);
 130                         r600_set_constants_dirty_if_bound(rctx, &rctx->ps_constbuf_state, rbuffer);
 131                 }
 132         }
 133 #if 0 /* this is broken (see Bug 53130) */
 134         else if ((transfer->usage & PIPE_TRANSFER_DISCARD_RANGE) &&
 135                  !(transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 136                  rctx->screen->has_streamout &&
 137                  /* The buffer range must be aligned to 4. */
 138                  transfer->box.x % 4 == 0 && transfer->box.width % 4 == 0) {
 139                 assert(transfer->usage & PIPE_TRANSFER_WRITE);
 140
 141                 /* Check if mapping this buffer would cause waiting for the GPU. */
 142                 if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 143                     rctx->ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
 144                         /* Do a wait-free write-only transfer using a temporary buffer. */
 145                         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 146
 147                         rtransfer->staging = (struct r600_resource*)
 148                                 pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER,
 149                                                    PIPE_USAGE_STAGING, transfer->box.width);
 150                         return rctx->ws->buffer_map(rtransfer->staging->cs_buf, rctx->cs, PIPE_TRANSFER_WRITE);
 151                 }
 152         }
 153 #endif
 154
 155         data = rctx->ws->buffer_map(rbuffer->cs_buf, rctx->cs, transfer->usage);
 156         if (!data)
 157                 return NULL;
 158
 159         return (uint8_t*)data + transfer->box.x;
 160 }
 161
 162 static void r600_buffer_transfer_unmap(struct pipe_context *pipe,
 163                                         struct pipe_transfer *transfer)
 164 {
 165         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 166
 167         if (rtransfer->staging) {
 168                 struct pipe_box box;
 169                 u_box_1d(0, transfer->box.width, &box);
 170
 171                 /* Copy the staging buffer into the original one. */
 172                 r600_copy_buffer(pipe, transfer->resource, transfer->box.x,
 173                                  &rtransfer->staging->b.b, &box);
 174                 pipe_resource_reference((struct pipe_resource**)&rtransfer->staging, NULL);
 175         }
 176 }
 177
 178 static void r600_transfer_destroy(struct pipe_context *ctx,
 179                                   struct pipe_transfer *transfer)
 180 {
 181         struct r600_context *rctx = (struct r600_context*)ctx;
 182         util_slab_free(&rctx->pool_transfers, transfer);
 183 }
 184
 185 static const struct u_resource_vtbl r600_buffer_vtbl =
 186 {
 187         u_default_resource_get_handle,          /* get_handle */
 188         r600_buffer_destroy,                    /* resource_destroy */
 189         r600_get_transfer,                      /* get_transfer */
 190         r600_transfer_destroy,                  /* transfer_destroy */
 191         r600_buffer_transfer_map,               /* transfer_map */
 192         NULL,                                   /* transfer_flush_region */
 193         r600_buffer_transfer_unmap,             /* transfer_unmap */
 194         NULL                                    /* transfer_inline_write */
 195 };
 196
 197 bool r600_init_resource(struct r600_screen *rscreen,
 198                         struct r600_resource *res,
 199                         unsigned size, unsigned alignment,
 200                         unsigned bind, unsigned usage)
 201 {
 202         uint32_t initial_domain, domains;
 203
 204         /* Staging resources particpate in transfers and blits only
 205          * and are used for uploads and downloads from regular
 206          * resources.  We generate them internally for some transfers.
 207          */
 208         if (usage == PIPE_USAGE_STAGING) {
 209                 domains = RADEON_DOMAIN_GTT;
 210                 initial_domain = RADEON_DOMAIN_GTT;
 211         } else {
 212                 domains = RADEON_DOMAIN_GTT | RADEON_DOMAIN_VRAM;
 213
 214                 switch(usage) {
 215                 case PIPE_USAGE_DYNAMIC:
 216                 case PIPE_USAGE_STREAM:
 217                 case PIPE_USAGE_STAGING:
 218                         initial_domain = RADEON_DOMAIN_GTT;
 219                         break;
 220                 case PIPE_USAGE_DEFAULT:
 221                 case PIPE_USAGE_STATIC:
 222                 case PIPE_USAGE_IMMUTABLE:
 223                 default:
 224                         initial_domain = RADEON_DOMAIN_VRAM;
 225                         break;
 226                 }
 227         }
 228
 229         res->buf = rscreen->ws->buffer_create(rscreen->ws, size, alignment, bind, initial_domain);
 230         if (!res->buf) {
 231                 return false;
 232         }
 233
 234         res->cs_buf = rscreen->ws->buffer_get_cs_handle(res->buf);
 235         res->domains = domains;
 236         return true;
 237 }
 238
 239 struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 240                                          const struct pipe_resource *templ)
 241 {
 242         struct r600_screen *rscreen = (struct r600_screen*)screen;
 243         struct r600_resource *rbuffer;
 244         /* XXX We probably want a different alignment for buffers and textures. */
 245         unsigned alignment = 4096;
 246
 247         rbuffer = MALLOC_STRUCT(r600_resource);
 248
 249         rbuffer->b.b = *templ;
 250         pipe_reference_init(&rbuffer->b.b.reference, 1);
 251         rbuffer->b.b.screen = screen;
 252         rbuffer->b.vtbl = &r600_buffer_vtbl;
 253
 254         if (!r600_init_resource(rscreen, rbuffer, templ->width0, alignment, templ->bind, templ->usage)) {
 255                 FREE(rbuffer);
 256                 return NULL;
 257         }
 258         return &rbuffer->b.b;
 259 }