/**************************************************************************
 *
 * Copyright © 2008-2012 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 **************************************************************************/

#ifdef __KERNEL__

#include <drm/vmwgfx_drm.h>
#define surf_size_struct struct drm_vmw_size

#else /* __KERNEL__ */

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(_A) (sizeof(_A) / sizeof((_A)[0]))
#endif /* ARRAY_SIZE */

#define DIV_ROUND_UP(x, y)  (((x) + (y) - 1) / (y))
#define max_t(type, x, y)  ((x) > (y) ? (x) : (y))
#define min_t(type, x, y)  ((x) < (y) ? (x) : (y))
#define surf_size_struct SVGA3dSize
#define u32 uint32
#define u64 uint64_t
#define U32_MAX ((u32)~0U)

#endif /* __KERNEL__ */

#include "svga3d_reg.h"

/*
 * enum svga3d_block_desc describes the active data channels in a block.
 *
 * There can be at-most four active channels in a block:
 *    1. Red, bump W, luminance and depth are stored in the first channel.
 *    2. Green, bump V and stencil are stored in the second channel.
 *    3. Blue and bump U are stored in the third channel.
 *    4. Alpha and bump Q are stored in the fourth channel.
 *
 * Block channels can be used to store compressed and buffer data:
 *    1. For compressed formats, only the data channel is used and its size
 *       is equal to that of a singular block in the compression scheme.
 *    2. For buffer formats, only the data channel is used and its size is
 *       exactly one byte in length.
 *    3. In each case the bit depth represent the size of a singular block.
 *
 * Note: Compressed and IEEE formats do not use the bitMask structure.
 */

enum svga3d_block_desc {
	SVGA3DBLOCKDESC_NONE        = 0,         /* No channels are active */
	SVGA3DBLOCKDESC_BLUE        = 1 << 0,    /* Block with red channel
						    data */
	SVGA3DBLOCKDESC_U           = 1 << 0,    /* Block with bump U channel
						    data */
	SVGA3DBLOCKDESC_UV_VIDEO    = 1 << 7,    /* Block with alternating video
						    U and V */
	SVGA3DBLOCKDESC_GREEN       = 1 << 1,    /* Block with green channel
						    data */
	SVGA3DBLOCKDESC_V           = 1 << 1,    /* Block with bump V channel
						    data */
	SVGA3DBLOCKDESC_STENCIL     = 1 << 1,    /* Block with a stencil
						    channel */
	SVGA3DBLOCKDESC_RED         = 1 << 2,    /* Block with blue channel
						    data */
	SVGA3DBLOCKDESC_W           = 1 << 2,    /* Block with bump W channel
						    data */
	SVGA3DBLOCKDESC_LUMINANCE   = 1 << 2,    /* Block with luminance channel
						    data */
	SVGA3DBLOCKDESC_Y           = 1 << 2,    /* Block with video luminance
						    data */
	SVGA3DBLOCKDESC_DEPTH       = 1 << 2,    /* Block with depth channel */
	SVGA3DBLOCKDESC_ALPHA       = 1 << 3,    /* Block with an alpha
						    channel */
	SVGA3DBLOCKDESC_Q           = 1 << 3,    /* Block with bump Q channel
						    data */
	SVGA3DBLOCKDESC_BUFFER      = 1 << 4,    /* Block stores 1 byte of
						    data */
	SVGA3DBLOCKDESC_COMPRESSED  = 1 << 5,    /* Block stores n bytes of
						    data depending on the
						    compression method used */
	SVGA3DBLOCKDESC_IEEE_FP     = 1 << 6,    /* Block stores data in an IEEE
						    floating point
						    representation in
						    all channels */
	SVGA3DBLOCKDESC_PLANAR_YUV  = 1 << 8,    /* Three separate blocks store
						    data. */
	SVGA3DBLOCKDESC_U_VIDEO     = 1 << 9,    /* Block with U video data */
	SVGA3DBLOCKDESC_V_VIDEO     = 1 << 10,   /* Block with V video data */
	SVGA3DBLOCKDESC_EXP         = 1 << 11,   /* Shared exponent */
	SVGA3DBLOCKDESC_SRGB        = 1 << 12,   /* Data is in sRGB format */
	SVGA3DBLOCKDESC_2PLANAR_YUV = 1 << 13,   /* 2 planes of Y, UV,
						    e.g., NV12. */
	SVGA3DBLOCKDESC_3PLANAR_YUV = 1 << 14,   /* 3 planes of separate
						    Y, U, V, e.g., YV12. */

	SVGA3DBLOCKDESC_RG         = SVGA3DBLOCKDESC_RED |
	SVGA3DBLOCKDESC_GREEN,
	SVGA3DBLOCKDESC_RGB        = SVGA3DBLOCKDESC_RG |
	SVGA3DBLOCKDESC_BLUE,
	SVGA3DBLOCKDESC_RGB_SRGB   = SVGA3DBLOCKDESC_RGB |
	SVGA3DBLOCKDESC_SRGB,
	SVGA3DBLOCKDESC_RGBA       = SVGA3DBLOCKDESC_RGB |
	SVGA3DBLOCKDESC_ALPHA,
	SVGA3DBLOCKDESC_RGBA_SRGB  = SVGA3DBLOCKDESC_RGBA |
	SVGA3DBLOCKDESC_SRGB,
	SVGA3DBLOCKDESC_UV         = SVGA3DBLOCKDESC_U |
	SVGA3DBLOCKDESC_V,
	SVGA3DBLOCKDESC_UVL        = SVGA3DBLOCKDESC_UV |
	SVGA3DBLOCKDESC_LUMINANCE,
	SVGA3DBLOCKDESC_UVW        = SVGA3DBLOCKDESC_UV |
	SVGA3DBLOCKDESC_W,
	SVGA3DBLOCKDESC_UVWA       = SVGA3DBLOCKDESC_UVW |
	SVGA3DBLOCKDESC_ALPHA,
	SVGA3DBLOCKDESC_UVWQ       = SVGA3DBLOCKDESC_U |
	SVGA3DBLOCKDESC_V |
	SVGA3DBLOCKDESC_W |
	SVGA3DBLOCKDESC_Q,
	SVGA3DBLOCKDESC_LA         = SVGA3DBLOCKDESC_LUMINANCE |
	SVGA3DBLOCKDESC_ALPHA,
	SVGA3DBLOCKDESC_R_FP       = SVGA3DBLOCKDESC_RED |
	SVGA3DBLOCKDESC_IEEE_FP,
	SVGA3DBLOCKDESC_RG_FP      = SVGA3DBLOCKDESC_R_FP |
	SVGA3DBLOCKDESC_GREEN,
	SVGA3DBLOCKDESC_RGB_FP     = SVGA3DBLOCKDESC_RG_FP |
	SVGA3DBLOCKDESC_BLUE,
	SVGA3DBLOCKDESC_RGBA_FP    = SVGA3DBLOCKDESC_RGB_FP |
	SVGA3DBLOCKDESC_ALPHA,
	SVGA3DBLOCKDESC_DS         = SVGA3DBLOCKDESC_DEPTH |
	SVGA3DBLOCKDESC_STENCIL,
	SVGA3DBLOCKDESC_YUV        = SVGA3DBLOCKDESC_UV_VIDEO |
	SVGA3DBLOCKDESC_Y,
	SVGA3DBLOCKDESC_AYUV       = SVGA3DBLOCKDESC_ALPHA |
	SVGA3DBLOCKDESC_Y |
	SVGA3DBLOCKDESC_U_VIDEO |
	SVGA3DBLOCKDESC_V_VIDEO,
	SVGA3DBLOCKDESC_RGBE       = SVGA3DBLOCKDESC_RGB |
	SVGA3DBLOCKDESC_EXP,
	SVGA3DBLOCKDESC_COMPRESSED_SRGB = SVGA3DBLOCKDESC_COMPRESSED |
	SVGA3DBLOCKDESC_SRGB,
	SVGA3DBLOCKDESC_NV12       = SVGA3DBLOCKDESC_PLANAR_YUV |
	SVGA3DBLOCKDESC_2PLANAR_YUV,
	SVGA3DBLOCKDESC_YV12       = SVGA3DBLOCKDESC_PLANAR_YUV |
	SVGA3DBLOCKDESC_3PLANAR_YUV,
};

/*
 * SVGA3dSurfaceDesc describes the actual pixel data.
 *
 * This structure provides the following information:
 *    1. Block description.
 *    2. Dimensions of a block in the surface.
 *    3. Size of block in bytes.
 *    4. Bit depth of the pixel data.
 *    5. Channel bit depths and masks (if applicable).
 */
#define SVGA3D_CHANNEL_DEF(type)		\
	struct {				\
		union {				\
			type blue;              \
			type u;                 \
			type uv_video;          \
			type u_video;           \
		};				\
		union {				\
			type green;             \
			type v;                 \
			type stencil;           \
			type v_video;           \
		};				\
		union {				\
			type red;               \
			type w;                 \
			type luminance;         \
			type y;                 \
			type depth;             \
			type data;              \
		};				\
		union {				\
			type alpha;             \
			type q;                 \
			type exp;               \
		};				\
	}

struct svga3d_surface_desc {
	enum svga3d_block_desc block_desc;
	surf_size_struct block_size;
	u32 bytes_per_block;
	u32 pitch_bytes_per_block;

	struct {
		u32 total;
		SVGA3D_CHANNEL_DEF(uint8);
	} bit_depth;

	struct {
		SVGA3D_CHANNEL_DEF(uint8);
	} bit_offset;
};

static const struct svga3d_surface_desc svga3d_surface_descs[] = {
	{SVGA3DBLOCKDESC_NONE,
	 {1, 1, 1},  0, 0, {0, {{0}, {0}, {0}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_FORMAT_INVALID */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  4, 4, {24, {{8}, {8}, {8}, {0} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_X8R8G8B8 */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_A8R8G8B8 */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  2, 2, {16, {{5}, {6}, {5}, {0} } },
	 {{{0}, {5}, {11}, {0} } } },    /* SVGA3D_R5G6B5 */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  2, 2, {15, {{5}, {5}, {5}, {0} } },
	 {{{0}, {5}, {10}, {0} } } },    /* SVGA3D_X1R5G5B5 */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  2, 2, {16, {{5}, {5}, {5}, {1} } },
	 {{{0}, {5}, {10}, {15} } } },   /* SVGA3D_A1R5G5B5 */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  2, 2, {16, {{4}, {4}, {4}, {4} } },
	 {{{0}, {4}, {8}, {12} } } },    /* SVGA3D_A4R4G4B4 */

	{SVGA3DBLOCKDESC_DEPTH,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_Z_D32 */

	{SVGA3DBLOCKDESC_DEPTH,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_Z_D16 */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_Z_D24S8 */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  2, 2, {16, {{0}, {1}, {15}, {0} } },
	 {{{0}, {15}, {0}, {0} } } },    /* SVGA3D_Z_D15S1 */

	{SVGA3DBLOCKDESC_LUMINANCE,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_LUMINANCE8 */

	{SVGA3DBLOCKDESC_LA,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {4}, {4} } },
	 {{{0}, {0}, {0}, {4} } } },     /* SVGA3D_LUMINANCE4_ALPHA4 */

	{SVGA3DBLOCKDESC_LUMINANCE,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_LUMINANCE16 */

	{SVGA3DBLOCKDESC_LA,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {8}, {8} } },
	 {{{0}, {0}, {0}, {8} } } },     /* SVGA3D_LUMINANCE8_ALPHA8 */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_DXT1 */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_DXT2 */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_DXT3 */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_DXT4 */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_DXT5 */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {8}, {8} } },
	 {{{0}, {0}, {0}, {8} } } },     /* SVGA3D_BUMPU8V8 */

	{SVGA3DBLOCKDESC_UVL,
	 {1, 1, 1},  2, 2, {16, {{5}, {5}, {6}, {0} } },
	 {{{11}, {6}, {0}, {0} } } },    /* SVGA3D_BUMPL6V5U5 */

	{SVGA3DBLOCKDESC_UVL,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {0} } },
	 {{{16}, {8}, {0}, {0} } } },    /* SVGA3D_BUMPX8L8V8U8 */

	{SVGA3DBLOCKDESC_UVL,
	 {1, 1, 1},  3, 3, {24, {{8}, {8}, {8}, {0} } },
	 {{{16}, {8}, {0}, {0} } } },    /* SVGA3D_BUMPL8V8U8 */

	{SVGA3DBLOCKDESC_RGBA_FP,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_ARGB_S10E5 */

	{SVGA3DBLOCKDESC_RGBA_FP,
	 {1, 1, 1},  16, 16, {128, {{32}, {32}, {32}, {32} } },
	 {{{64}, {32}, {0}, {96} } } },  /* SVGA3D_ARGB_S23E8 */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{10}, {10}, {10}, {2} } },
	 {{{0}, {10}, {20}, {30} } } },  /* SVGA3D_A2R10G10B10 */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  2, 2, {16, {{8}, {8}, {0}, {0} } },
	 {{{8}, {0}, {0}, {0} } } },     /* SVGA3D_V8U8 */

	{SVGA3DBLOCKDESC_UVWQ,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{24}, {16}, {8}, {0} } } },   /* SVGA3D_Q8W8V8U8 */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  2, 2, {16, {{8}, {8}, {0}, {0} } },
	 {{{8}, {0}, {0}, {0} } } },     /* SVGA3D_CxV8U8 */

	{SVGA3DBLOCKDESC_UVL,
	 {1, 1, 1},  4, 4, {24, {{8}, {8}, {8}, {0} } },
	 {{{16}, {8}, {0}, {0} } } },    /* SVGA3D_X8L8V8U8 */

	{SVGA3DBLOCKDESC_UVWA,
	 {1, 1, 1},  4, 4, {32, {{10}, {10}, {10}, {2} } },
	 {{{0}, {10}, {20}, {30} } } },  /* SVGA3D_A2W10V10U10 */

	{SVGA3DBLOCKDESC_ALPHA,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {0}, {8} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_ALPHA8 */

	{SVGA3DBLOCKDESC_R_FP,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R_S10E5 */

	{SVGA3DBLOCKDESC_R_FP,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R_S23E8 */

	{SVGA3DBLOCKDESC_RG_FP,
	 {1, 1, 1},  4, 4, {32, {{0}, {16}, {16}, {0} } },
	 {{{0}, {16}, {0}, {0} } } },    /* SVGA3D_RG_S10E5 */

	{SVGA3DBLOCKDESC_RG_FP,
	 {1, 1, 1},  8, 8, {64, {{0}, {32}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_RG_S23E8 */

	{SVGA3DBLOCKDESC_BUFFER,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BUFFER */

	{SVGA3DBLOCKDESC_DEPTH,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_Z_D24X8 */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  4, 4, {32, {{16}, {16}, {0}, {0} } },
	 {{{16}, {0}, {0}, {0} } } },    /* SVGA3D_V16U16 */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  4, 4, {32, {{0}, {16}, {16}, {0} } },
	 {{{0}, {0}, {16}, {0} } } },    /* SVGA3D_G16R16 */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_A16B16G16R16 */

	{SVGA3DBLOCKDESC_YUV,
	 {1, 1, 1},  2, 2, {16, {{8}, {0}, {8}, {0} } },
	 {{{0}, {0}, {8}, {0} } } },     /* SVGA3D_UYVY */

	{SVGA3DBLOCKDESC_YUV,
	 {1, 1, 1},  2, 2, {16, {{8}, {0}, {8}, {0} } },
	 {{{8}, {0}, {0}, {0} } } },     /* SVGA3D_YUY2 */

	{SVGA3DBLOCKDESC_NV12,
	 {2, 2, 1},  6, 2, {48, {{0}, {0}, {48}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_NV12 */

	{SVGA3DBLOCKDESC_AYUV,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_AYUV */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  16, 16, {128, {{32}, {32}, {32}, {32} } },
	 {{{64}, {32}, {0}, {96} } } },  /* SVGA3D_R32G32B32A32_TYPELESS */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  16, 16, {128, {{32}, {32}, {32}, {32} } },
	 {{{64}, {32}, {0}, {96} } } },  /* SVGA3D_R32G32B32A32_UINT */

	{SVGA3DBLOCKDESC_UVWQ,
	 {1, 1, 1},  16, 16, {128, {{32}, {32}, {32}, {32} } },
	 {{{64}, {32}, {0}, {96} } } },  /* SVGA3D_R32G32B32A32_SINT */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  12, 12, {96, {{32}, {32}, {32}, {0} } },
	 {{{64}, {32}, {0}, {0} } } },   /* SVGA3D_R32G32B32_TYPELESS */

	{SVGA3DBLOCKDESC_RGB_FP,
	 {1, 1, 1},  12, 12, {96, {{32}, {32}, {32}, {0} } },
	 {{{64}, {32}, {0}, {0} } } },   /* SVGA3D_R32G32B32_FLOAT */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  12, 12, {96, {{32}, {32}, {32}, {0} } },
	 {{{64}, {32}, {0}, {0} } } },   /* SVGA3D_R32G32B32_UINT */

	{SVGA3DBLOCKDESC_UVW,
	 {1, 1, 1},  12, 12, {96, {{32}, {32}, {32}, {0} } },
	 {{{64}, {32}, {0}, {0} } } },   /* SVGA3D_R32G32B32_SINT */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_R16G16B16A16_TYPELESS */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_R16G16B16A16_UINT */

	{SVGA3DBLOCKDESC_UVWQ,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_R16G16B16A16_SNORM */

	{SVGA3DBLOCKDESC_UVWQ,
	 {1, 1, 1},  8, 8, {64, {{16}, {16}, {16}, {16} } },
	 {{{32}, {16}, {0}, {48} } } },  /* SVGA3D_R16G16B16A16_SINT */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  8, 8, {64, {{0}, {32}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_R32G32_TYPELESS */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  8, 8, {64, {{0}, {32}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_R32G32_UINT */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  8, 8, {64, {{0}, {32}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_R32G32_SINT */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  8, 8, {64, {{0}, {8}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_R32G8X24_TYPELESS */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  8, 8, {64, {{0}, {8}, {32}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_D32_FLOAT_S8X24_UINT */

	{SVGA3DBLOCKDESC_R_FP,
	 {1, 1, 1},  8, 8, {64, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },    /* SVGA3D_R32_FLOAT_X8_X24_TYPELESS */

	{SVGA3DBLOCKDESC_GREEN,
	 {1, 1, 1},  8, 8, {64, {{0}, {8}, {0}, {0} } },
	 {{{0}, {32}, {0}, {0} } } },    /* SVGA3D_X32_TYPELESS_G8X24_UINT */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{10}, {10}, {10}, {2} } },
	 {{{0}, {10}, {20}, {30} } } },  /* SVGA3D_R10G10B10A2_TYPELESS */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{10}, {10}, {10}, {2} } },
	 {{{0}, {10}, {20}, {30} } } },  /* SVGA3D_R10G10B10A2_UINT */

	{SVGA3DBLOCKDESC_RGB_FP,
	 {1, 1, 1},  4, 4, {32, {{10}, {11}, {11}, {0} } },
	 {{{0}, {10}, {21}, {0} } } },  /* SVGA3D_R11G11B10_FLOAT */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{16}, {8}, {0}, {24} } } },   /* SVGA3D_R8G8B8A8_TYPELESS */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{16}, {8}, {0}, {24} } } },   /* SVGA3D_R8G8B8A8_UNORM */

	{SVGA3DBLOCKDESC_RGBA_SRGB,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{16}, {8}, {0}, {24} } } },   /* SVGA3D_R8G8B8A8_UNORM_SRGB */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{16}, {8}, {0}, {24} } } },   /* SVGA3D_R8G8B8A8_UINT */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{16}, {8}, {0}, {24} } } },   /* SVGA3D_R8G8B8A8_SINT */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  4, 4, {32, {{0}, {16}, {16}, {0} } },
	 {{{0}, {16}, {0}, {0} } } },    /* SVGA3D_R16G16_TYPELESS */

	{SVGA3DBLOCKDESC_RG_FP,
	 {1, 1, 1},  4, 4, {32, {{0}, {16}, {16}, {0} } },
	 {{{0}, {16}, {0}, {0} } } },    /* SVGA3D_R16G16_UINT */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  4, 4, {32, {{0}, {16}, {16}, {0} } },
	 {{{0}, {16}, {0}, {0} } } },    /* SVGA3D_R16G16_SINT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R32_TYPELESS */

	{SVGA3DBLOCKDESC_DEPTH,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_D32_FLOAT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R32_UINT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {32}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R32_SINT */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_R24G8_TYPELESS */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_D24_UNORM_S8_UINT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  4, 4, {32, {{0}, {0}, {24}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R24_UNORM_X8_TYPELESS */

	{SVGA3DBLOCKDESC_GREEN,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {0}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_X24_TYPELESS_G8_UINT */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_R8G8_TYPELESS */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_R8G8_UNORM */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_R8G8_UINT */

	{SVGA3DBLOCKDESC_UV,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_R8G8_SINT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R16_TYPELESS */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R16_UNORM */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R16_UINT */

	{SVGA3DBLOCKDESC_U,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R16_SNORM */

	{SVGA3DBLOCKDESC_U,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R16_SINT */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R8_TYPELESS */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R8_UNORM */

	{SVGA3DBLOCKDESC_RED,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R8_UINT */

	{SVGA3DBLOCKDESC_U,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R8_SNORM */

	{SVGA3DBLOCKDESC_U,
	 {1, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R8_SINT */

	{SVGA3DBLOCKDESC_RED,
	 {8, 1, 1},  1, 1, {8, {{0}, {0}, {8}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_R1_UNORM */

	{SVGA3DBLOCKDESC_RGBE,
	 {1, 1, 1},  4, 4, {32, {{9}, {9}, {9}, {5} } },
	 {{{18}, {9}, {0}, {27} } } },   /* SVGA3D_R9G9B9E5_SHAREDEXP */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_R8G8_B8G8_UNORM */

	{SVGA3DBLOCKDESC_RG,
	 {1, 1, 1},  2, 2, {16, {{0}, {8}, {8}, {0} } },
	 {{{0}, {8}, {0}, {0} } } },     /* SVGA3D_G8R8_G8B8_UNORM */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC1_TYPELESS */

	{SVGA3DBLOCKDESC_COMPRESSED_SRGB,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC1_UNORM_SRGB */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC2_TYPELESS */

	{SVGA3DBLOCKDESC_COMPRESSED_SRGB,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC2_UNORM_SRGB */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC3_TYPELESS */

	{SVGA3DBLOCKDESC_COMPRESSED_SRGB,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC3_UNORM_SRGB */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC4_TYPELESS */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC4_UNORM */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  8, 8, {64, {{0}, {0}, {64}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC4_SNORM */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC5_TYPELESS */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC5_UNORM */

	{SVGA3DBLOCKDESC_COMPRESSED,
	 {4, 4, 1},  16, 16, {128, {{0}, {0}, {128}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_BC5_SNORM */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{10}, {10}, {10}, {2} } },
	 {{{0}, {10}, {20}, {30} } } },  /* SVGA3D_R10G10B10_XR_BIAS_A2_UNORM */

	{SVGA3DBLOCKDESC_RGBA,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_B8G8R8A8_TYPELESS */

	{SVGA3DBLOCKDESC_RGBA_SRGB,
	 {1, 1, 1},  4, 4, {32, {{8}, {8}, {8}, {8} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_B8G8R8A8_UNORM_SRGB */

	{SVGA3DBLOCKDESC_RGB,
	 {1, 1, 1},  4, 4, {24, {{8}, {8}, {8}, {0} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_B8G8R8X8_TYPELESS */

	{SVGA3DBLOCKDESC_RGB_SRGB,
	 {1, 1, 1},  4, 4, {24, {{8}, {8}, {8}, {0} } },
	 {{{0}, {8}, {16}, {24} } } },   /* SVGA3D_B8G8R8X8_UNORM_SRGB */

	{SVGA3DBLOCKDESC_DEPTH,
	 {1, 1, 1},  2, 2, {16, {{0}, {0}, {16}, {0} } },
	 {{{0}, {0}, {0}, {0} } } },     /* SVGA3D_Z_DF16 */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_Z_DF24 */

	{SVGA3DBLOCKDESC_DS,
	 {1, 1, 1},  4, 4, {32, {{0}, {8}, {24}, {0} } },
	 {{{0}, {24}, {0}, {0} } } },    /* SVGA3D_Z_D24S8_INT */
};

static inline u32 clamped_umul32(u32 a, u32 b)
{
	u64 tmp = (u64) a*b;
	return (tmp > (u64) U32_MAX) ? U32_MAX : tmp;
}

static inline const struct svga3d_surface_desc *
svga3dsurface_get_desc(SVGA3dSurfaceFormat format)
{
	if (format < ARRAY_SIZE(svga3d_surface_descs))
		return &svga3d_surface_descs[format];

	return &svga3d_surface_descs[SVGA3D_FORMAT_INVALID];
}

/*
 *----------------------------------------------------------------------
 *
 * svga3dsurface_get_mip_size --
 *
 *      Given a base level size and the mip level, compute the size of
 *      the mip level.
 *
 * Results:
 *      See above.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static inline surf_size_struct
svga3dsurface_get_mip_size(surf_size_struct base_level, u32 mip_level)
{
	surf_size_struct size;

	size.width = max_t(u32, base_level.width >> mip_level, 1);
	size.height = max_t(u32, base_level.height >> mip_level, 1);
	size.depth = max_t(u32, base_level.depth >> mip_level, 1);
	return size;
}

static inline void
svga3dsurface_get_size_in_blocks(const struct svga3d_surface_desc *desc,
				 const surf_size_struct *pixel_size,
				 surf_size_struct *block_size)
{
	block_size->width = DIV_ROUND_UP(pixel_size->width,
					 desc->block_size.width);
	block_size->height = DIV_ROUND_UP(pixel_size->height,
					  desc->block_size.height);
	block_size->depth = DIV_ROUND_UP(pixel_size->depth,
					 desc->block_size.depth);
}

static inline bool
svga3dsurface_is_planar_surface(const struct svga3d_surface_desc *desc)
{
	return (desc->block_desc & SVGA3DBLOCKDESC_PLANAR_YUV) != 0;
}

static inline u32
svga3dsurface_calculate_pitch(const struct svga3d_surface_desc *desc,
			      const surf_size_struct *size)
{
	u32 pitch;
	surf_size_struct blocks;

	svga3dsurface_get_size_in_blocks(desc, size, &blocks);

	pitch = blocks.width * desc->pitch_bytes_per_block;

	return pitch;
}

/*
 *-----------------------------------------------------------------------------
 *
 * svga3dsurface_get_image_buffer_size --
 *
 *      Return the number of bytes of buffer space required to store
 *      one image of a surface, optionally using the specified pitch.
 *
 *      If pitch is zero, it is assumed that rows are tightly packed.
 *
 *      This function is overflow-safe. If the result would have
 *      overflowed, instead we return MAX_UINT32.
 *
 * Results:
 *      Byte count.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

static inline u32
svga3dsurface_get_image_buffer_size(const struct svga3d_surface_desc *desc,
				    const surf_size_struct *size,
				    u32 pitch)
{
	surf_size_struct image_blocks;
	u32 slice_size, total_size;

	svga3dsurface_get_size_in_blocks(desc, size, &image_blocks);

	if (svga3dsurface_is_planar_surface(desc)) {
		total_size = clamped_umul32(image_blocks.width,
					    image_blocks.height);
		total_size = clamped_umul32(total_size, image_blocks.depth);
		total_size = clamped_umul32(total_size, desc->bytes_per_block);
		return total_size;
	}

	if (pitch == 0)
		pitch = svga3dsurface_calculate_pitch(desc, size);

	slice_size = clamped_umul32(image_blocks.height, pitch);
	total_size = clamped_umul32(slice_size, image_blocks.depth);

	return total_size;
}

static inline u32
svga3dsurface_get_serialized_size(SVGA3dSurfaceFormat format,
				  surf_size_struct base_level_size,
				  u32 num_mip_levels,
				  bool cubemap)
{
	const struct svga3d_surface_desc *desc = svga3dsurface_get_desc(format);
	u64 total_size = 0;
	u32 mip;

	for (mip = 0; mip < num_mip_levels; mip++) {
		surf_size_struct size =
			svga3dsurface_get_mip_size(base_level_size, mip);
		total_size += svga3dsurface_get_image_buffer_size(desc,
								  &size, 0);
	}

	if (cubemap)
		total_size *= SVGA3D_MAX_SURFACE_FACES;

	return (u32) min_t(u64, total_size, (u64) U32_MAX);
}


/**
 * svga3dsurface_get_pixel_offset - Compute the offset (in bytes) to a pixel
 * in an image (or volume).
 *
 * @width: The image width in pixels.
 * @height: The image height in pixels
 */
static inline u32
svga3dsurface_get_pixel_offset(SVGA3dSurfaceFormat format,
			       u32 width, u32 height,
			       u32 x, u32 y, u32 z)
{
	const struct svga3d_surface_desc *desc = svga3dsurface_get_desc(format);
	const u32 bw = desc->block_size.width, bh = desc->block_size.height;
	const u32 bd = desc->block_size.depth;
	const u32 rowstride = DIV_ROUND_UP(width, bw) * desc->bytes_per_block;
	const u32 imgstride = DIV_ROUND_UP(height, bh) * rowstride;
	const u32 offset = (z / bd * imgstride +
			    y / bh * rowstride +
			    x / bw * desc->bytes_per_block);
	return offset;
}


static inline u32
svga3dsurface_get_image_offset(SVGA3dSurfaceFormat format,
			       surf_size_struct baseLevelSize,
			       u32 numMipLevels,
			       u32 face,
			       u32 mip)

{
	u32 offset;
	u32 mipChainBytes;
	u32 mipChainBytesToLevel;
	u32 i;
	const struct svga3d_surface_desc *desc;
	surf_size_struct mipSize;
	u32 bytes;

	desc = svga3dsurface_get_desc(format);

	mipChainBytes = 0;
	mipChainBytesToLevel = 0;
	for (i = 0; i < numMipLevels; i++) {
		mipSize = svga3dsurface_get_mip_size(baseLevelSize, i);
		bytes = svga3dsurface_get_image_buffer_size(desc, &mipSize, 0);
		mipChainBytes += bytes;
		if (i < mip)
			mipChainBytesToLevel += bytes;
	}

	offset = mipChainBytes * face + mipChainBytesToLevel;

	return offset;
}