src/gallium/drivers/virgl/virgl_resource.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   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 #include "util/u_format.h"
  24 #include "util/u_inlines.h"
  25 #include "virgl_context.h"
  26 #include "virgl_resource.h"
  27 #include "virgl_screen.h"
  28
  29 bool virgl_res_needs_flush_wait(struct virgl_context *vctx,
  30                                 struct virgl_resource *res,
  31                                 unsigned usage)
  32 {
  33    struct virgl_screen *vs = virgl_screen(vctx->base.screen);
  34
  35    if ((!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) && vs->vws->res_is_referenced(vs->vws, vctx->cbuf, res->hw_res)) {
  36       return true;
  37    }
  38    return false;
  39 }
  40
  41 bool virgl_res_needs_readback(struct virgl_context *vctx,
  42                               struct virgl_resource *res,
  43                               unsigned usage)
  44 {
  45    bool readback = true;
  46    if (res->clean)
  47       readback = false;
  48    else if (usage & PIPE_TRANSFER_DISCARD_RANGE)
  49       readback = false;
  50    else if ((usage & (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT)) ==
  51             (PIPE_TRANSFER_WRITE | PIPE_TRANSFER_FLUSH_EXPLICIT))
  52       readback = false;
  53    return readback;
  54 }
  55
  56 static struct pipe_resource *virgl_resource_create(struct pipe_screen *screen,
  57                                                    const struct pipe_resource *templ)
  58 {
  59     struct virgl_screen *vs = virgl_screen(screen);
  60     if (templ->target == PIPE_BUFFER)
  61         return virgl_buffer_create(vs, templ);
  62     else
  63         return virgl_texture_create(vs, templ);
  64 }
  65
  66 static struct pipe_resource *virgl_resource_from_handle(struct pipe_screen *screen,
  67                                                         const struct pipe_resource *templ,
  68                                                         struct winsys_handle *whandle,
  69                                                         unsigned usage)
  70 {
  71     struct virgl_screen *vs = virgl_screen(screen);
  72     if (templ->target == PIPE_BUFFER)
  73         return NULL;
  74     else
  75         return virgl_texture_from_handle(vs, templ, whandle);
  76 }
  77
  78 void virgl_init_screen_resource_functions(struct pipe_screen *screen)
  79 {
  80     screen->resource_create = virgl_resource_create;
  81     screen->resource_from_handle = virgl_resource_from_handle;
  82     screen->resource_get_handle = u_resource_get_handle_vtbl;
  83     screen->resource_destroy = u_resource_destroy_vtbl;
  84 }
  85
  86 static void virgl_buffer_subdata(struct pipe_context *pipe,
  87                                  struct pipe_resource *resource,
  88                                  unsigned usage, unsigned offset,
  89                                  unsigned size, const void *data)
  90 {
  91    struct pipe_box box;
  92
  93    if (offset == 0 && size == resource->width0)
  94       usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
  95    else
  96       usage |= PIPE_TRANSFER_DISCARD_RANGE;
  97
  98    u_box_1d(offset, size, &box);
  99
 100    if (size >= (VIRGL_MAX_CMDBUF_DWORDS * 4))
 101       u_default_buffer_subdata(pipe, resource, usage, offset, size, data);
 102    else
 103       virgl_transfer_inline_write(pipe, resource, 0, usage, &box, data, 0, 0);
 104 }
 105
 106 void virgl_init_context_resource_functions(struct pipe_context *ctx)
 107 {
 108     ctx->transfer_map = u_transfer_map_vtbl;
 109     ctx->transfer_flush_region = u_transfer_flush_region_vtbl;
 110     ctx->transfer_unmap = u_transfer_unmap_vtbl;
 111     ctx->buffer_subdata = virgl_buffer_subdata;
 112     ctx->texture_subdata = u_default_texture_subdata;
 113 }
 114
 115 void virgl_resource_layout(struct pipe_resource *pt,
 116                            struct virgl_resource_metadata *metadata)
 117 {
 118    unsigned level, nblocksy;
 119    unsigned width = pt->width0;
 120    unsigned height = pt->height0;
 121    unsigned depth = pt->depth0;
 122    unsigned buffer_size = 0;
 123
 124    for (level = 0; level <= pt->last_level; level++) {
 125       unsigned slices;
 126
 127       if (pt->target == PIPE_TEXTURE_CUBE)
 128          slices = 6;
 129       else if (pt->target == PIPE_TEXTURE_3D)
 130          slices = depth;
 131       else
 132          slices = pt->array_size;
 133
 134       nblocksy = util_format_get_nblocksy(pt->format, height);
 135       metadata->stride[level] = util_format_get_stride(pt->format, width);
 136       metadata->layer_stride[level] = nblocksy * metadata->stride[level];
 137       metadata->level_offset[level] = buffer_size;
 138
 139       buffer_size += slices * metadata->layer_stride[level];
 140
 141       width = u_minify(width, 1);
 142       height = u_minify(height, 1);
 143       depth = u_minify(depth, 1);
 144    }
 145
 146    if (pt->nr_samples <= 1)
 147       metadata->total_size = buffer_size;
 148    else /* don't create guest backing store for MSAA */
 149       metadata->total_size = 0;
 150 }
 151
 152 struct virgl_transfer *
 153 virgl_resource_create_transfer(struct pipe_context *ctx,
 154                                struct pipe_resource *pres,
 155                                const struct virgl_resource_metadata *metadata,
 156                                unsigned level, unsigned usage,
 157                                const struct pipe_box *box)
 158 {
 159    struct virgl_transfer *trans;
 160    enum pipe_format format = pres->format;
 161    struct virgl_context *vctx = virgl_context(ctx);
 162    const unsigned blocksy = box->y / util_format_get_blockheight(format);
 163    const unsigned blocksx = box->x / util_format_get_blockwidth(format);
 164
 165    unsigned offset = metadata->level_offset[level];
 166    if (pres->target == PIPE_TEXTURE_CUBE ||
 167        pres->target == PIPE_TEXTURE_CUBE_ARRAY ||
 168        pres->target == PIPE_TEXTURE_3D ||
 169        pres->target == PIPE_TEXTURE_2D_ARRAY) {
 170       offset += box->z * metadata->layer_stride[level];
 171    }
 172    else if (pres->target == PIPE_TEXTURE_1D_ARRAY) {
 173       offset += box->z * metadata->stride[level];
 174    }
 175    else {
 176       assert(box->z == 0);
 177    }
 178
 179    offset += blocksy * metadata->stride[level];
 180    offset += blocksx * util_format_get_blocksize(format);
 181
 182    trans = slab_alloc(&vctx->transfer_pool);
 183    if (!trans)
 184       return NULL;
 185
 186    trans->base.resource = pres;
 187    trans->base.level = level;
 188    trans->base.usage = usage;
 189    trans->base.box = *box;
 190    trans->base.stride = metadata->stride[level];
 191    trans->base.layer_stride = metadata->layer_stride[level];
 192    trans->offset = offset;
 193    util_range_init(&trans->range);
 194
 195    if (trans->base.resource->target != PIPE_TEXTURE_3D &&
 196        trans->base.resource->target != PIPE_TEXTURE_CUBE &&
 197        trans->base.resource->target != PIPE_TEXTURE_1D_ARRAY &&
 198        trans->base.resource->target != PIPE_TEXTURE_2D_ARRAY &&
 199        trans->base.resource->target != PIPE_TEXTURE_CUBE_ARRAY)
 200       trans->l_stride = 0;
 201    else
 202       trans->l_stride = trans->base.layer_stride;
 203
 204    return trans;
 205 }
 206
 207 void virgl_resource_destroy_transfer(struct virgl_context *vctx,
 208                                      struct virgl_transfer *trans)
 209 {
 210    util_range_destroy(&trans->range);
 211    slab_free(&vctx->transfer_pool, trans);
 212 }