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linux_dsm_epyc7002/drivers/gpu/drm/vmwgfx/svga3d_surfacedefs.h

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drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
/**************************************************************************
*
* 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))
drm/vmwgfx: Fix possible integer overflow Cc: stable@vger.kernel.org Reported-by: Brian Paul <brianp@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2014-02-12 18:56:48 +07:00
#define min_t(type, x, y) ((x) < (y) ? (x) : (y))
drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
#define surf_size_struct SVGA3dSize
#define u32 uint32
drm/vmwgfx: Fix possible integer overflow Cc: stable@vger.kernel.org Reported-by: Brian Paul <brianp@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2014-02-12 18:56:48 +07:00
#define u64 uint64_t
#define U32_MAX ((u32)~0U)
drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
#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)
{
drm/vmwgfx: Fix possible integer overflow Cc: stable@vger.kernel.org Reported-by: Brian Paul <brianp@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2014-02-12 18:56:48 +07:00
u64 tmp = (u64) a*b;
return (tmp > (u64) U32_MAX) ? U32_MAX : tmp;
drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
}
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);
drm/vmwgfx: Fix possible integer overflow Cc: stable@vger.kernel.org Reported-by: Brian Paul <brianp@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2014-02-12 18:56:48 +07:00
u64 total_size = 0;
drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
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;
drm/vmwgfx: Fix possible integer overflow Cc: stable@vger.kernel.org Reported-by: Brian Paul <brianp@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2014-02-12 18:56:48 +07:00
return (u32) min_t(u64, total_size, (u64) U32_MAX);
drm/vmwgfx: Add and make use of a header for surface size calculation. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Dmitry Torokhov <dtor@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 19:19:37 +07:00
}
/**
* 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;
}
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