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_set_constants_dirty_if_bound(struct r600_context *rctx,
  43                                               struct r600_resource *rbuffer)
  44 {
  45         unsigned shader;
  46
  47         for (shader = 0; shader < PIPE_SHADER_TYPES; shader++) {
  48                 struct r600_constbuf_state *state = &rctx->constbuf_state[shader];
  49                 bool found = false;
  50                 uint32_t mask = state->enabled_mask;
  51
  52                 while (mask) {
  53                         unsigned i = u_bit_scan(&mask);
  54                         if (state->cb[i].buffer == &rbuffer->b.b) {
  55                                 found = true;
  56                                 state->dirty_mask |= 1 << i;
  57                         }
  58                 }
  59                 if (found) {
  60                         r600_constant_buffers_dirty(rctx, state);
  61                 }
  62         }
  63 }
  64
  65 static void *r600_buffer_get_transfer(struct pipe_context *ctx,
  66                                       struct pipe_resource *resource,
  67                                       unsigned level,
  68                                       unsigned usage,
  69                                       const struct pipe_box *box,
  70                                       struct pipe_transfer **ptransfer,
  71                                       void *data, struct r600_resource *staging,
  72                                       unsigned offset)
  73 {
  74         struct r600_context *rctx = (struct r600_context*)ctx;
  75         struct r600_transfer *transfer = util_slab_alloc(&rctx->pool_transfers);
  76
  77         transfer->transfer.resource = resource;
  78         transfer->transfer.level = level;
  79         transfer->transfer.usage = usage;
  80         transfer->transfer.box = *box;
  81         transfer->transfer.stride = 0;
  82         transfer->transfer.layer_stride = 0;
  83         transfer->offset = offset;
  84         transfer->staging = staging;
  85         *ptransfer = &transfer->transfer;
  86         return data;
  87 }
  88
  89 static void *r600_buffer_transfer_map(struct pipe_context *ctx,
  90                                         struct pipe_resource *resource,
  91                                         unsigned level,
  92                                         unsigned usage,
  93                                         const struct pipe_box *box,
  94                                         struct pipe_transfer **ptransfer)
  95 {
  96         struct r600_context *rctx = (struct r600_context*)ctx;
  97         struct r600_resource *rbuffer = r600_resource(resource);
  98         uint8_t *data;
  99
 100         assert(box->x + box->width <= resource->width0);
 101
 102         /* See if the buffer range being mapped has never been initialized,
 103          * in which case it can be mapped unsynchronized. */
 104         if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 105             usage & PIPE_TRANSFER_WRITE &&
 106             !util_ranges_intersect(&rbuffer->valid_buffer_range, box->x, box->x + box->width)) {
 107                 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 108         }
 109
 110         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
 111             !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 112                 assert(usage & PIPE_TRANSFER_WRITE);
 113
 114                 /* Check if mapping this buffer would cause waiting for the GPU. */
 115                 if (r600_rings_is_buffer_referenced(&rctx->b, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 116                     rctx->b.ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
 117                         unsigned i, mask;
 118
 119                         /* Discard the buffer. */
 120                         pb_reference(&rbuffer->buf, NULL);
 121
 122                         /* Create a new one in the same pipe_resource. */
 123                         /* XXX We probably want a different alignment for buffers and textures. */
 124                         r600_init_resource(&rctx->screen->b, rbuffer, rbuffer->b.b.width0, 4096,
 125                                            TRUE, rbuffer->b.b.usage);
 126
 127                         /* We changed the buffer, now we need to bind it where the old one was bound. */
 128                         /* Vertex buffers. */
 129                         mask = rctx->vertex_buffer_state.enabled_mask;
 130                         while (mask) {
 131                                 i = u_bit_scan(&mask);
 132                                 if (rctx->vertex_buffer_state.vb[i].buffer == &rbuffer->b.b) {
 133                                         rctx->vertex_buffer_state.dirty_mask |= 1 << i;
 134                                         r600_vertex_buffers_dirty(rctx);
 135                                 }
 136                         }
 137                         /* Streamout buffers. */
 138                         for (i = 0; i < rctx->b.streamout.num_targets; i++) {
 139                                 if (rctx->b.streamout.targets[i]->b.buffer == &rbuffer->b.b) {
 140                                         if (rctx->b.streamout.begin_emitted) {
 141                                                 r600_emit_streamout_end(&rctx->b);
 142                                         }
 143                                         rctx->b.streamout.append_bitmask = rctx->b.streamout.enabled_mask;
 144                                         r600_streamout_buffers_dirty(&rctx->b);
 145                                 }
 146                         }
 147                         /* Constant buffers. */
 148                         r600_set_constants_dirty_if_bound(rctx, rbuffer);
 149                 }
 150         }
 151         else if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
 152                  !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 153                  !(rctx->screen->b.debug_flags & DBG_NO_DISCARD_RANGE) &&
 154                  (rctx->screen->b.has_cp_dma ||
 155                   (rctx->screen->b.has_streamout &&
 156                    /* The buffer range must be aligned to 4 with streamout. */
 157                    box->x % 4 == 0 && box->width % 4 == 0))) {
 158                 assert(usage & PIPE_TRANSFER_WRITE);
 159
 160                 /* Check if mapping this buffer would cause waiting for the GPU. */
 161                 if (r600_rings_is_buffer_referenced(&rctx->b, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 162                     rctx->b.ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
 163                         /* Do a wait-free write-only transfer using a temporary buffer. */
 164                         unsigned offset;
 165                         struct r600_resource *staging = NULL;
 166
 167                         u_upload_alloc(rctx->uploader, 0, box->width + (box->x % R600_MAP_BUFFER_ALIGNMENT),
 168                                        &offset, (struct pipe_resource**)&staging, (void**)&data);
 169
 170                         if (staging) {
 171                                 data += box->x % R600_MAP_BUFFER_ALIGNMENT;
 172                                 return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 173                                                                 ptransfer, data, staging, offset);
 174                         }
 175                 }
 176         }
 177
 178         /* mmap and synchronize with rings */
 179         data = r600_buffer_map_sync_with_rings(&rctx->b, rbuffer, usage);
 180         if (!data) {
 181                 return NULL;
 182         }
 183         data += box->x;
 184
 185         return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 186                                         ptransfer, data, NULL, 0);
 187 }
 188
 189 static void r600_buffer_transfer_unmap(struct pipe_context *pipe,
 190                                         struct pipe_transfer *transfer)
 191 {
 192         struct r600_context *rctx = (struct r600_context*)pipe;
 193         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 194         struct r600_resource *rbuffer = r600_resource(transfer->resource);
 195
 196         if (rtransfer->staging) {
 197                 struct pipe_resource *dst, *src;
 198                 unsigned soffset, doffset, size;
 199                 struct pipe_box box;
 200
 201                 dst = transfer->resource;
 202                 src = &rtransfer->staging->b.b;
 203                 size = transfer->box.width;
 204                 doffset = transfer->box.x;
 205                 soffset = rtransfer->offset + transfer->box.x % R600_MAP_BUFFER_ALIGNMENT;
 206
 207                 u_box_1d(soffset, size, &box);
 208
 209                 /* Copy the staging buffer into the original one. */
 210                 if (!(size % 4) && !(doffset % 4) && !(soffset % 4) &&
 211                     rctx->b.dma_copy(pipe, dst, 0, doffset, 0, 0, src, 0, &box)) {
 212                         /* DONE. */
 213                 } else {
 214                         pipe->resource_copy_region(pipe, dst, 0, doffset, 0, 0, src, 0, &box);
 215                 }
 216                 pipe_resource_reference((struct pipe_resource**)&rtransfer->staging, NULL);
 217         }
 218
 219         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 220                 util_range_add(&rbuffer->valid_buffer_range, transfer->box.x,
 221                                transfer->box.x + transfer->box.width);
 222         }
 223         util_slab_free(&rctx->pool_transfers, transfer);
 224 }
 225
 226 static const struct u_resource_vtbl r600_buffer_vtbl =
 227 {
 228         u_default_resource_get_handle,          /* get_handle */
 229         r600_buffer_destroy,                    /* resource_destroy */
 230         r600_buffer_transfer_map,               /* transfer_map */
 231         NULL,                                   /* transfer_flush_region */
 232         r600_buffer_transfer_unmap,             /* transfer_unmap */
 233         NULL                                    /* transfer_inline_write */
 234 };
 235
 236 struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 237                                          const struct pipe_resource *templ,
 238                                          unsigned alignment)
 239 {
 240         struct r600_screen *rscreen = (struct r600_screen*)screen;
 241         struct r600_resource *rbuffer;
 242
 243         rbuffer = MALLOC_STRUCT(r600_resource);
 244
 245         rbuffer->b.b = *templ;
 246         pipe_reference_init(&rbuffer->b.b.reference, 1);
 247         rbuffer->b.b.screen = screen;
 248         rbuffer->b.vtbl = &r600_buffer_vtbl;
 249         util_range_init(&rbuffer->valid_buffer_range);
 250
 251         if (!r600_init_resource(&rscreen->b, rbuffer, templ->width0, alignment, TRUE, templ->usage)) {
 252                 FREE(rbuffer);
 253                 return NULL;
 254         }
 255         return &rbuffer->b.b;
 256 }