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/*
* Copyright 2015 Intel Corporation
*
* 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.
*/
#include <assert.h>
#include "mesa/main/imports.h"
#include "isl.h"
/**
* Log base 2, rounding towards zero.
*/
static inline uint32_t
isl_log2u(uint32_t n)
{
assert(n != 0);
return 31 - __builtin_clz(n);
}
void
isl_device_init(struct isl_device *dev,
const struct brw_device_info *info)
{
dev->info = info;
}
/**
* The returned extent's units are (width=bytes, height=rows).
*/
void
isl_tiling_get_extent(const struct isl_device *dev,
enum isl_tiling tiling,
uint32_t cpp,
struct isl_extent2d *e)
{
static const struct isl_extent2d legacy_extents[] = {
[ISL_TILING_LINEAR] = { 1, 1 },
[ISL_TILING_X] = { 512, 8 },
[ISL_TILING_Y] = { 128, 32 },
[ISL_TILING_W] = { 128, 32 },
};
static const struct isl_extent2d yf_extents[] = {
/*cpp*/
/* 1*/ [0] = { 64, 64 },
/* 2*/ [1] = { 128, 32 },
/* 4*/ [2] = { 128, 32 },
/* 8*/ [3] = { 256, 16 },
/*16*/ [4] = { 256, 16 },
};
assert(cpp > 0);
switch (tiling) {
case ISL_TILING_LINEAR:
case ISL_TILING_X:
case ISL_TILING_Y:
case ISL_TILING_W:
*e = legacy_extents[tiling];
return;
case ISL_TILING_Yf:
case ISL_TILING_Ys:
assert(_mesa_is_pow_two(cpp));
*e = yf_extents[isl_log2u(cpp)];
if (tiling == ISL_TILING_Ys) {
e->width *= 4;
e->height *= 4;
}
return;
}
}
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