Exemplo n.º 1
0
static void *
svga_texture_transfer_map(struct pipe_context *pipe,
                          struct pipe_resource *texture,
                          unsigned level,
                          unsigned usage,
                          const struct pipe_box *box,
                          struct pipe_transfer **ptransfer)
{
   struct svga_context *svga = svga_context(pipe);
   struct svga_screen *ss = svga_screen(pipe->screen);
   struct svga_winsys_screen *sws = ss->sws;
   struct svga_texture *tex = svga_texture(texture);
   struct svga_transfer *st;
   unsigned nblocksx, nblocksy;
   boolean use_direct_map = svga_have_gb_objects(svga) &&
      !svga_have_gb_dma(svga);
   unsigned d;
   void *returnVal;
   int64_t begin = os_time_get();

   /* We can't map texture storage directly unless we have GB objects */
   if (usage & PIPE_TRANSFER_MAP_DIRECTLY) {
      if (svga_have_gb_objects(svga))
         use_direct_map = TRUE;
      else
         return NULL;
   }

   st = CALLOC_STRUCT(svga_transfer);
   if (!st)
      return NULL;

   {
      unsigned w, h;
      if (use_direct_map) {
         /* we'll directly access the guest-backed surface */
         w = u_minify(texture->width0, level);
         h = u_minify(texture->height0, level);
         d = u_minify(texture->depth0, level);
      }
      else {
         /* we'll put the data into a tightly packed buffer */
         w = box->width;
         h = box->height;
         d = box->depth;
      }
      nblocksx = util_format_get_nblocksx(texture->format, w);
      nblocksy = util_format_get_nblocksy(texture->format, h);
   }

   pipe_resource_reference(&st->base.resource, texture);

   st->base.level = level;
   st->base.usage = usage;
   st->base.box = *box;
   st->base.stride = nblocksx*util_format_get_blocksize(texture->format);
   st->base.layer_stride = st->base.stride * nblocksy;

   switch (tex->b.b.target) {
   case PIPE_TEXTURE_CUBE:
   case PIPE_TEXTURE_2D_ARRAY:
   case PIPE_TEXTURE_1D_ARRAY:
      st->slice = st->base.box.z;
      st->base.box.z = 0;   /* so we don't apply double offsets below */
      break;
   default:
      st->slice = 0;
      break;
   }

   if (usage & PIPE_TRANSFER_WRITE) {
      /* record texture upload for HUD */
      svga->hud.num_bytes_uploaded +=
         nblocksx * nblocksy * d * util_format_get_blocksize(texture->format);
   }

   if (!use_direct_map) {
      /* Use a DMA buffer */
      st->hw_nblocksy = nblocksy;

      st->hwbuf = svga_winsys_buffer_create(svga, 1, 0,
                                   st->hw_nblocksy * st->base.stride * d);
      while(!st->hwbuf && (st->hw_nblocksy /= 2)) {
         st->hwbuf = svga_winsys_buffer_create(svga, 1, 0,
                                   st->hw_nblocksy * st->base.stride * d);
      }

      if (!st->hwbuf) {
         FREE(st);
         return NULL;
      }

      if (st->hw_nblocksy < nblocksy) {
         /* We couldn't allocate a hardware buffer big enough for the transfer,
          * so allocate regular malloc memory instead */
         if (0) {
            debug_printf("%s: failed to allocate %u KB of DMA, "
                         "splitting into %u x %u KB DMA transfers\n",
                         __FUNCTION__,
                         (nblocksy*st->base.stride + 1023)/1024,
                         (nblocksy + st->hw_nblocksy - 1)/st->hw_nblocksy,
                         (st->hw_nblocksy*st->base.stride + 1023)/1024);
         }

         st->swbuf = MALLOC(nblocksy * st->base.stride * d);
         if (!st->swbuf) {
            sws->buffer_destroy(sws, st->hwbuf);
            FREE(st);
            return NULL;
         }
      }

      if (usage & PIPE_TRANSFER_READ) {
         SVGA3dSurfaceDMAFlags flags;
         memset(&flags, 0, sizeof flags);
         svga_transfer_dma(svga, st, SVGA3D_READ_HOST_VRAM, flags);
      }
   } else {
      struct pipe_transfer *transfer = &st->base;
      struct svga_winsys_surface *surf = tex->handle;

      if (!surf) {
         FREE(st);
         return NULL;
      }

      if (need_tex_readback(transfer)) {
	 enum pipe_error ret;

         svga_surfaces_flush(svga);

         if (svga_have_vgpu10(svga)) {
            ret = readback_image_vgpu10(svga, surf, st->slice, transfer->level,
                                        tex->b.b.last_level + 1);
         } else {
            ret = readback_image_vgpu9(svga, surf, st->slice, transfer->level);
         }

         assert(ret == PIPE_OK);
         (void) ret;

	 svga_context_flush(svga, NULL);

         /*
          * Note: if PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE were specified
          * we could potentially clear the flag for all faces/layers/mips.
          */
         svga_clear_texture_rendered_to(tex, st->slice, transfer->level);
      }
      else {
	 assert(transfer->usage & PIPE_TRANSFER_WRITE);
	 if ((transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED) == 0) {
            svga_surfaces_flush(svga);
            if (!sws->surface_is_flushed(sws, surf))
               svga_context_flush(svga, NULL);
	 }
      }
   }

   st->use_direct_map = use_direct_map;

   *ptransfer = &st->base;

   /*
    * Begin mapping code
    */
   if (st->swbuf) {
      returnVal = st->swbuf;
   }
   else if (!st->use_direct_map) {
      returnVal = sws->buffer_map(sws, st->hwbuf, usage);
   }
   else {
      SVGA3dSize baseLevelSize;
      struct svga_texture *tex = svga_texture(texture);
      struct svga_winsys_surface *surf = tex->handle;
      uint8_t *map;
      boolean retry;
      unsigned offset, mip_width, mip_height;
      unsigned xoffset = st->base.box.x;
      unsigned yoffset = st->base.box.y;
      unsigned zoffset = st->base.box.z;

      map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
      if (map == NULL && retry) {
         /*
          * At this point, the svga_surfaces_flush() should already have
          * called in svga_texture_get_transfer().
          */
         svga_context_flush(svga, NULL);
         map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
      }

      /*
       * Make sure we return NULL if the map fails
       */
      if (!map) {
         FREE(st);
         return map;
      }

      /**
       * Compute the offset to the specific texture slice in the buffer.
       */
      baseLevelSize.width = tex->b.b.width0;
      baseLevelSize.height = tex->b.b.height0;
      baseLevelSize.depth = tex->b.b.depth0;

      offset = svga3dsurface_get_image_offset(tex->key.format, baseLevelSize,
                                              tex->b.b.last_level + 1, /* numMips */
                                              st->slice, level);
      if (level > 0) {
         assert(offset > 0);
      }

      mip_width = u_minify(tex->b.b.width0, level);
      mip_height = u_minify(tex->b.b.height0, level);

      offset += svga3dsurface_get_pixel_offset(tex->key.format,
                                               mip_width, mip_height,
                                               xoffset, yoffset, zoffset);
      returnVal = (void *) (map + offset);
   }

   svga->hud.map_buffer_time += (os_time_get() - begin);
   svga->hud.num_resources_mapped++;

   return returnVal;
}
/**
 * Use direct map for the transfer request
 */
static void *
svga_texture_transfer_map_direct(struct svga_context *svga,
                                 struct svga_transfer *st)
{
   struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
   struct pipe_transfer *transfer = &st->base;
   struct pipe_resource *texture = transfer->resource;
   struct svga_texture *tex = svga_texture(texture);
   struct svga_winsys_surface *surf = tex->handle;
   unsigned level = st->base.level;
   unsigned w, h, nblocksx, nblocksy, i;
   unsigned usage = st->base.usage;

   if (need_tex_readback(st)) {
      enum pipe_error ret;

      svga_surfaces_flush(svga);

      for (i = 0; i < st->box.d; i++) {
         if (svga_have_vgpu10(svga)) {
            ret = readback_image_vgpu10(svga, surf, st->slice + i, level,
                                        tex->b.b.last_level + 1);
         } else {
            ret = readback_image_vgpu9(svga, surf, st->slice + i, level);
         }
      }
      svga->hud.num_readbacks++;
      SVGA_STATS_COUNT_INC(sws, SVGA_STATS_COUNT_TEXREADBACK);

      assert(ret == PIPE_OK);
      (void) ret;

      svga_context_flush(svga, NULL);
      /*
       * Note: if PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE were specified
       * we could potentially clear the flag for all faces/layers/mips.
       */
      svga_clear_texture_rendered_to(tex, st->slice, level);
   }
   else {
      assert(usage & PIPE_TRANSFER_WRITE);
      if ((usage & PIPE_TRANSFER_UNSYNCHRONIZED) == 0) {
         if (svga_is_texture_dirty(tex, st->slice, level)) {
            /*
             * do a surface flush if the subresource has been modified
             * in this command buffer.
             */
            svga_surfaces_flush(svga);
            if (!sws->surface_is_flushed(sws, surf)) {
               svga->hud.surface_write_flushes++;
               SVGA_STATS_COUNT_INC(sws, SVGA_STATS_COUNT_SURFACEWRITEFLUSH);
               svga_context_flush(svga, NULL);
            }
         }
      }
   }

   /* we'll directly access the guest-backed surface */
   w = u_minify(texture->width0, level);
   h = u_minify(texture->height0, level);
   nblocksx = util_format_get_nblocksx(texture->format, w);
   nblocksy = util_format_get_nblocksy(texture->format, h);
   st->hw_nblocksy = nblocksy;
   st->base.stride = nblocksx*util_format_get_blocksize(texture->format);
   st->base.layer_stride = st->base.stride * nblocksy;

   /*
    * Begin mapping code
    */
   {
      SVGA3dSize baseLevelSize;
      uint8_t *map;
      boolean retry;
      unsigned offset, mip_width, mip_height;

      map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
      if (map == NULL && retry) {
         /*
          * At this point, the svga_surfaces_flush() should already have
          * called in svga_texture_get_transfer().
          */
         svga->hud.surface_write_flushes++;
         svga_context_flush(svga, NULL);
         map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
      }

      /*
       * Make sure we return NULL if the map fails
       */
      if (!map) {
         return NULL;
      }

      /**
       * Compute the offset to the specific texture slice in the buffer.
       */
      baseLevelSize.width = tex->b.b.width0;
      baseLevelSize.height = tex->b.b.height0;
      baseLevelSize.depth = tex->b.b.depth0;

      if ((tex->b.b.target == PIPE_TEXTURE_1D_ARRAY) ||
          (tex->b.b.target == PIPE_TEXTURE_2D_ARRAY) ||
          (tex->b.b.target == PIPE_TEXTURE_CUBE_ARRAY)) {
         st->base.layer_stride =
            svga3dsurface_get_image_offset(tex->key.format, baseLevelSize,
                                           tex->b.b.last_level + 1, 1, 0);
      }

      offset = svga3dsurface_get_image_offset(tex->key.format, baseLevelSize,
                                              tex->b.b.last_level + 1, /* numMips */
                                              st->slice, level);
      if (level > 0) {
         assert(offset > 0);
      }

      mip_width = u_minify(tex->b.b.width0, level);
      mip_height = u_minify(tex->b.b.height0, level);

      offset += svga3dsurface_get_pixel_offset(tex->key.format,
                                               mip_width, mip_height,
                                               st->box.x,
                                               st->box.y,
                                               st->box.z);

      return (void *) (map + offset);
   }
}