64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* SPDX-License-Identifier: MIT */
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#ifndef __NV50_TILE_H__
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#define __NV50_TILE_H__
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#include <linux/types.h>
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#include <linux/math.h>
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/*
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* Tiling parameters for NV50+.
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* GOB = Group of bytes, the main unit for tiling blocks.
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* Tiling blocks are a power of 2 number of GOB.
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* All GOBs and blocks have the same width: 64 bytes (so 16 pixels in 32bits).
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* tile_mode is the log2 of the number of GOB per block.
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*/
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#define NV_TILE_GOB_HEIGHT_TESLA 4 /* 4 x 64 bytes = 256 bytes for a GOB on Tesla*/
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#define NV_TILE_GOB_HEIGHT 8 /* 8 x 64 bytes = 512 bytes for a GOB on Fermi and later */
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#define NV_TILE_GOB_WIDTH_BYTES 64
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/* Number of blocks to cover the width of the framebuffer */
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static inline u32 nouveau_get_width_in_blocks(u32 stride)
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{
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return DIV_ROUND_UP(stride, NV_TILE_GOB_WIDTH_BYTES);
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}
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/* Return the height in pixel of one GOB */
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static inline u32 nouveau_get_gob_height(u16 family)
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{
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if (family == NV_DEVICE_INFO_V0_TESLA)
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return NV_TILE_GOB_HEIGHT_TESLA;
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else
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return NV_TILE_GOB_HEIGHT;
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}
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/* Number of blocks to cover the heigth of the framebuffer */
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static inline u32 nouveau_get_height_in_blocks(u32 height, u32 gobs_in_block, u16 family)
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{
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return DIV_ROUND_UP(height, nouveau_get_gob_height(family) * gobs_in_block);
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}
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/* Return the GOB size in bytes */
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static inline u32 nouveau_get_gob_size(u16 family)
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{
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return nouveau_get_gob_height(family) * NV_TILE_GOB_WIDTH_BYTES;
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}
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/* Return the number of GOB in a block */
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static inline int nouveau_get_gobs_in_block(u32 tile_mode, u16 chipset)
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{
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if (chipset >= 0xc0)
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return 1 << (tile_mode >> 4);
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return 1 << tile_mode;
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}
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/* Return true if tile_mode is invalid */
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static inline bool nouveau_check_tile_mode(u32 tile_mode, u16 chipset)
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{
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if (chipset >= 0xc0)
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return (tile_mode & 0xfffff0f);
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return (tile_mode & 0xfffffff0);
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}
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#endif
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