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isl: Add a helper for calculating subimage memory ranges

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Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3519>
This commit is contained in:
Jason Ekstrand 2020-01-22 11:40:00 -06:00 • committed by Marge Bot
parent 4793116036
commit 64ca8a3272
2 changed files with 71 additions and 0 deletions
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50
src/intel/isl/isl.c
View file

@ -2513,6 +2513,56 @@ isl_surf_get_image_offset_B_tile_sa(const struct isl_surf *surf,
}
}
void
isl_surf_get_image_range_B_tile(const struct isl_surf *surf,
uint32_t level,
uint32_t logical_array_layer,
uint32_t logical_z_offset_px,
uint32_t *start_tile_B,
uint32_t *end_tile_B)
{
uint32_t start_x_offset_el, start_y_offset_el;
isl_surf_get_image_offset_el(surf, level, logical_array_layer,
logical_z_offset_px,
&start_x_offset_el,
&start_y_offset_el);
/* Compute the size of the subimage in surface elements */
const uint32_t subimage_w_sa = isl_minify(surf->phys_level0_sa.w, level);
const uint32_t subimage_h_sa = isl_minify(surf->phys_level0_sa.h, level);
const struct isl_format_layout *fmtl = isl_format_get_layout(surf->format);
const uint32_t subimage_w_el = isl_align_div_npot(subimage_w_sa, fmtl->bw);
const uint32_t subimage_h_el = isl_align_div_npot(subimage_h_sa, fmtl->bh);
/* Find the last pixel */
uint32_t end_x_offset_el = start_x_offset_el + subimage_w_el - 1;
uint32_t end_y_offset_el = start_y_offset_el + subimage_h_el - 1;
UNUSED uint32_t x_offset_el, y_offset_el;
isl_tiling_get_intratile_offset_el(surf->tiling, fmtl->bpb,
surf->row_pitch_B,
start_x_offset_el,
start_y_offset_el,
start_tile_B,
&x_offset_el,
&y_offset_el);
isl_tiling_get_intratile_offset_el(surf->tiling, fmtl->bpb,
surf->row_pitch_B,
end_x_offset_el,
end_y_offset_el,
end_tile_B,
&x_offset_el,
&y_offset_el);
/* We want the range we return to be exclusive but the tile containing the
* last pixel (what we just calculated) is inclusive. Add one.
*/
(*end_tile_B)++;
assert(*end_tile_B <= surf->size_B);
}
void
isl_surf_get_image_surf(const struct isl_device *dev,
const struct isl_surf *surf,

21
src/intel/isl/isl.h
View file

@ -2104,6 +2104,27 @@ isl_surf_get_image_offset_B_tile_sa(const struct isl_surf *surf,
uint32_t *x_offset_sa,
uint32_t *y_offset_sa);
/**
* Calculate the range in bytes occupied by a subimage, to the nearest tile.
*
* The range returned will be the smallest memory range in which the give
* subimage fits, rounded to even tiles. Intel images do not usually have a
* direct subimage -> range mapping so the range returned may contain data
* from other sub-images. The returned range is a half-open interval where
* all of the addresses within the subimage are < end_tile_B.
*
* @invariant level < surface levels
* @invariant logical_array_layer < logical array length of surface
* @invariant logical_z_offset_px < logical depth of surface at level
*/
void
isl_surf_get_image_range_B_tile(const struct isl_surf *surf,
uint32_t level,
uint32_t logical_array_layer,
uint32_t logical_z_offset_px,
uint32_t *start_tile_B,
uint32_t *end_tile_B);
/**
* Create an isl_surf that represents a particular subimage in the surface.
*