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isl: Rework the get_intratile_offset function

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The old function tried to work in elements which isn't, strictly speaking,
a valid thing to do.  In the case of a non-power-of-two format, there is no
guarantee that the x offset into the tile is a multiple of the format
block size.  This commit refactors it to work entirely in terms of a tiling
(not a surface) and bytes/rows.

Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
This commit is contained in:
Jason Ekstrand
2016-03-30 16:15:54 -07:00
parent 4caba94086
commit b37502b983
3 changed files with 60 additions and 38 deletions
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52
src/intel/isl/isl.c
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@@ -1417,33 +1417,39 @@ isl_surf_get_image_offset_el(const struct isl_surf *surf,
}
void
isl_surf_get_image_intratile_offset_el_xy(const struct isl_device *dev,
const struct isl_surf *surf,
uint32_t total_x_offset_el,
uint32_t total_y_offset_el,
uint32_t *base_address_offset,
uint32_t *x_offset_el,
uint32_t *y_offset_el)
isl_tiling_get_intratile_offset_el(const struct isl_device *dev,
enum isl_tiling tiling,
uint8_t bs,
uint32_t row_pitch,
uint32_t total_x_offset_el,
uint32_t total_y_offset_el,
uint32_t *base_address_offset,
uint32_t *x_offset_el,
uint32_t *y_offset_el)
{
const struct isl_format_layout *fmtl = isl_format_get_layout(surf->format);
struct isl_tile_info tile_info;
isl_surf_get_tile_info(dev, surf, &tile_info);
isl_tiling_get_info(dev, tiling, bs, &tile_info);
/* This function only really works for power-of-two surfaces. In
* theory, we could make it work for non-power-of-two surfaces by going
* to the left until we find a block that is bs-aligned. The Vulkan
* driver doesn't use non-power-of-two tiled surfaces so we'll leave
* this unimplemented for now.
*/
assert(tiling == ISL_TILING_LINEAR || isl_is_pow2(bs));
uint32_t small_y_offset_el = total_y_offset_el % tile_info.height;
uint32_t big_y_offset_el = total_y_offset_el - small_y_offset_el;
uint32_t big_y_offset_B = big_y_offset_el * surf->row_pitch;
uint32_t big_y_offset_B = big_y_offset_el * row_pitch;
uint32_t total_x_offset_B = total_x_offset_el * fmtl->bs;
uint32_t total_x_offset_B = total_x_offset_el * bs;
uint32_t small_x_offset_B = total_x_offset_B % tile_info.width;
uint32_t small_x_offset_el = small_x_offset_B / fmtl->bs;
uint32_t small_x_offset_el = small_x_offset_B / bs;
uint32_t big_x_offset_B = (total_x_offset_B / tile_info.width) * tile_info.size;
*base_address_offset = big_y_offset_B + big_x_offset_B;
*x_offset_el = small_x_offset_el;
*y_offset_el = small_y_offset_el;
}
void
@@ -1456,6 +1462,8 @@ isl_surf_get_image_intratile_offset_el(const struct isl_device *dev,
uint32_t *x_offset_el,
uint32_t *y_offset_el)
{
const struct isl_format_layout *fmtl = isl_format_get_layout(surf->format);
uint32_t total_x_offset_el;
uint32_t total_y_offset_el;
isl_surf_get_image_offset_el(surf, level,
@@ -1464,12 +1472,14 @@ isl_surf_get_image_intratile_offset_el(const struct isl_device *dev,
&total_x_offset_el,
&total_y_offset_el);
isl_surf_get_image_intratile_offset_el_xy(dev, surf,
total_x_offset_el,
total_y_offset_el,
base_address_offset,
x_offset_el,
y_offset_el);
isl_tiling_get_intratile_offset_el(dev, surf->tiling, fmtl->bs,
surf->row_pitch,
total_x_offset_el,
total_y_offset_el,
base_address_offset,
x_offset_el,
y_offset_el);
}
uint32_t