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/*
* Copyright © 2019 Google, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef FREEDRENO_LAYOUT_H_
#define FREEDRENO_LAYOUT_H_
/* Shared freedreno mipmap layout helper
*
* It does *not* attempt to track surface transitions, in particular
* about UBWC state. Possibly it should, but
* (a) I'm not sure if in all cases we can transparently do in-
* place transitions (ie. a5xx textures with interleaved
* meta and pixel data
* (b) Even if we can, we probably can't assume that we have
* figured out yet how to do in-place transition for every
* generation.
*/
/* Texture Layout on a3xx:
* -----------------------
*
* Each mipmap-level contains all of it's layers (ie. all cubmap
* faces, all 1d/2d array elements, etc). The texture sampler is
* programmed with the start address of each mipmap level, and hw
* derives the layer offset within the level.
*
*
* Texture Layout on a4xx+:
* -----------------------
*
* For cubemap and 2d array, each layer contains all of it's mipmap
* levels (layer_first layout).
*
* 3d textures are laid out as on a3xx.
*
* In either case, the slice represents the per-miplevel information,
* but in layer_first layout it only includes the first layer, and
* an additional offset of (rsc->layer_size * layer) must be added.
*
*
* UBWC Color Compressions (a5xx+):
* -------------------------------
*
* Color compression is only supported for tiled layouts. In general
* the meta "flag" buffer (ie. what holds the compression state for
* each block) can be separate from the color data, except for textures
* on a5xx where it needs to be interleaved with layers/levels of a
* texture.
*/
struct fdl_slice {
uint32_t offset; /* offset of first layer in slice */
uint32_t pitch;
uint32_t size0; /* size of first layer in slice */
};
/**
* Encapsulates the layout of a resource, including position of given 2d
* surface (layer, level) within. Or rather all the information needed
* to derive this.
*/
struct fdl_layout {
struct fdl_slice slices[MAX_MIP_LEVELS];
uint32_t layer_size;
bool layer_first : 1; /* see above description */
/* Note that for tiled textures, beyond a certain mipmap level (ie.
* when width is less than block size) things switch to linear. In
* general you should not directly look at fdl_layout::tile_mode,
* but instead use fdl_surface::tile_mode which will correctly take
* this into account.
*/
uint32_t tile_mode : 2;
/* Bytes per pixel (where a "pixel" is a single row of a block in the case
* of compression), including each sample in the case of multisample
* layouts.
*/
uint8_t cpp;
uint32_t width0, height0, depth0;
/* UBWC specific fields: */
uint32_t ubwc_offset; /* offset to UBWC meta data */
uint32_t ubwc_pitch;
uint32_t ubwc_size;
};
static inline uint32_t
fdl_layer_stride(const struct fdl_layout *layout, unsigned level)
{
if (layout->layer_first)
return layout->layer_size;
else
return layout->slices[level].size0;
}
static inline uint32_t
fdl_surface_offset(const struct fdl_layout *layout, unsigned level, unsigned layer)
{
const struct fdl_slice *slice = &layout->slices[level];
return slice->offset + fdl_layer_stride(layout, level) * layer;
}
static inline uint32_t
fdl_ubwc_offset(const struct fdl_layout *layout, unsigned level, unsigned layer)
{
/* for now this doesn't do anything clever, but when UBWC is enabled
* for multi layer/level images, it will.
*/
if (layout->ubwc_size) {
debug_assert(level == 0);
debug_assert(layer == 0);
}
return layout->ubwc_offset;
}
static inline bool
fdl_level_linear(const struct fdl_layout *layout, int level)
{
unsigned w = u_minify(layout->width0, level);
if (w < 16)
return true;
return false;
}
static inline uint32_t
fdl_tile_mode(const struct fdl_layout *layout, int level)
{
if (layout->tile_mode && fdl_level_linear(layout, level))
return 0; /* linear */
else
return layout->tile_mode;
}
static inline bool
fdl_ubwc_enabled(const struct fdl_layout *layout, int level)
{
return layout->ubwc_size && fdl_tile_mode(layout, level);
}
#endif /* FREEDRENO_LAYOUT_H_ */
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