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Date: Fri, 13 May 2022 08:29:05 +0800
From: kernel test robot <lkp@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/video/fbdev/tdfxfb.c:1118:17: sparse: sparse: incorrect type
in argument 1 (different address spaces)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f3f19f939c11925dadd3f4776f99f8c278a7017b
commit: 28e77cc1c0686621a4d416f599cee5ab369daa0a fortify: Detect struct member overflows in memset() at compile-time
date: 3 months ago
config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20220513/202205130718.EXPqeZmq-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 11.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=28e77cc1c0686621a4d416f599cee5ab369daa0a
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 28e77cc1c0686621a4d416f599cee5ab369daa0a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash drivers/video/fbdev/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
>> drivers/video/fbdev/tdfxfb.c:1118:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *cursorbase @@
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: expected void const *
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: got unsigned char [noderef] [usertype] __iomem *cursorbase
>> drivers/video/fbdev/tdfxfb.c:1118:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *cursorbase @@
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: expected void const *
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: got unsigned char [noderef] [usertype] __iomem *cursorbase
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got unsigned char [noderef] [usertype] __iomem *cursorbase @@
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: expected void *
drivers/video/fbdev/tdfxfb.c:1118:17: sparse: got unsigned char [noderef] [usertype] __iomem *cursorbase
drivers/video/fbdev/tdfxfb.c:1129:33: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/tdfxfb.c:1132:33: sparse: sparse: cast removes address space '__iomem' of expression
--
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
drivers/video/fbdev/pvr2fb.c:336:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:336:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:338:31: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:345:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:347:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:349:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:540:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:541:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:560:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:569:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:573:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:574:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:579:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:580:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:581:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:584:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:585:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:588:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:591:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:595:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:595:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:596:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:600:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:612:19: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:614:17: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:616:17: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/video/fbdev/pvr2fb.c:800:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/pvr2fb.c:800:9: sparse: expected void const *
drivers/video/fbdev/pvr2fb.c:800:9: sparse: got char [noderef] __iomem *screen_base
>> drivers/video/fbdev/pvr2fb.c:800:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/pvr2fb.c:800:9: sparse: expected void const *
drivers/video/fbdev/pvr2fb.c:800:9: sparse: got char [noderef] __iomem *screen_base
drivers/video/fbdev/pvr2fb.c:800:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/pvr2fb.c:800:9: sparse: expected void *
drivers/video/fbdev/pvr2fb.c:800:9: sparse: got char [noderef] __iomem *screen_base
drivers/video/fbdev/pvr2fb.c:832:15: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:1071:11: sparse: sparse: Using plain integer as NULL pointer
drivers/video/fbdev/pvr2fb.c:233:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:233:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:240:9: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/pvr2fb.c:240:9: sparse: sparse: cast removes address space '__iomem' of expression
--
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
>> drivers/video/fbdev/sstfb.c:337:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/sstfb.c:337:9: sparse: expected void const *
drivers/video/fbdev/sstfb.c:337:9: sparse: got char [noderef] __iomem *screen_base
>> drivers/video/fbdev/sstfb.c:337:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/sstfb.c:337:9: sparse: expected void const *
drivers/video/fbdev/sstfb.c:337:9: sparse: got char [noderef] __iomem *screen_base
drivers/video/fbdev/sstfb.c:337:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/sstfb.c:337:9: sparse: expected void *
drivers/video/fbdev/sstfb.c:337:9: sparse: got char [noderef] __iomem *screen_base
--
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
>> drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *dst @@
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: expected void const *
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: got unsigned char [noderef] [usertype] __iomem *dst
>> drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *dst @@
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: expected void const *
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: got unsigned char [noderef] [usertype] __iomem *dst
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got unsigned char [noderef] [usertype] __iomem *dst @@
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: expected void *
drivers/video/fbdev/aty/mach64_cursor.c:156:13: sparse: got unsigned char [noderef] [usertype] __iomem *dst
drivers/video/fbdev/aty/mach64_cursor.c:187:25: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/aty/mach64_cursor.c:188:25: sparse: sparse: cast removes address space '__iomem' of expression
drivers/video/fbdev/aty/mach64_cursor.c:209:30: sparse: sparse: cast removes address space '__iomem' of expression
--
command-line: note: in included file:
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
builtin:0:0: sparse: this was the original definition
builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
builtin:0:0: sparse: this was the original definition
>> drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: expected void const *
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: got char [noderef] __iomem *screen_base
>> drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: expected void const *
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: got char [noderef] __iomem *screen_base
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got char [noderef] __iomem *screen_base @@
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: expected void *
drivers/video/fbdev/kyro/fbdev.c:733:9: sparse: got char [noderef] __iomem *screen_base
vim +1118 drivers/video/fbdev/tdfxfb.c
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1038
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1039 static int tdfxfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1040 {
a807f618b625944 drivers/video/tdfxfb.c Antonino A. Daplas 2006-01-09 1041 struct tdfx_par *par = info->par;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1042 u32 vidcfg;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1043
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1044 if (!hwcursor)
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1045 return -EINVAL; /* just to force soft_cursor() call */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1046
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1047 /* Too large of a cursor or wrong bpp :-( */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1048 if (cursor->image.width > 64 ||
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1049 cursor->image.height > 64 ||
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1050 cursor->image.depth > 1)
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1051 return -EINVAL;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1052
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1053 vidcfg = tdfx_inl(par, VIDPROCCFG);
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1054 if (cursor->enable)
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1055 tdfx_outl(par, VIDPROCCFG, vidcfg | VIDCFG_HWCURSOR_ENABLE);
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1056 else
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1057 tdfx_outl(par, VIDPROCCFG, vidcfg & ~VIDCFG_HWCURSOR_ENABLE);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1058
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1059 /*
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1060 * If the cursor is not be changed this means either we want the
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1061 * current cursor state (if enable is set) or we want to query what
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1062 * we can do with the cursor (if enable is not set)
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1063 */
8af1d50f7f67937 drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1064 if (!cursor->set)
8af1d50f7f67937 drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1065 return 0;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1066
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1067 /* fix cursor color - XFree86 forgets to restore it properly */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1068 if (cursor->set & FB_CUR_SETCMAP) {
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1069 struct fb_cmap cmap = info->cmap;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1070 u32 bg_idx = cursor->image.bg_color;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1071 u32 fg_idx = cursor->image.fg_color;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1072 unsigned long bg_color, fg_color;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1073
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1074 fg_color = (((u32)cmap.red[fg_idx] & 0xff00) << 8) |
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1075 (((u32)cmap.green[fg_idx] & 0xff00) << 0) |
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1076 (((u32)cmap.blue[fg_idx] & 0xff00) >> 8);
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1077 bg_color = (((u32)cmap.red[bg_idx] & 0xff00) << 8) |
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1078 (((u32)cmap.green[bg_idx] & 0xff00) << 0) |
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1079 (((u32)cmap.blue[bg_idx] & 0xff00) >> 8);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1080 banshee_make_room(par, 2);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1081 tdfx_outl(par, HWCURC0, bg_color);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1082 tdfx_outl(par, HWCURC1, fg_color);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1083 }
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1084
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1085 if (cursor->set & FB_CUR_SETPOS) {
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1086 int x = cursor->image.dx;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1087 int y = cursor->image.dy - info->var.yoffset;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1088
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1089 x += 63;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1090 y += 63;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1091 banshee_make_room(par, 1);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1092 tdfx_outl(par, HWCURLOC, (y << 16) + x);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1093 }
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1094 if (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1095 /*
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1096 * Voodoo 3 and above cards use 2 monochrome cursor patterns.
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1097 * The reason is so the card can fetch 8 words at a time
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1098 * and are stored on chip for use for the next 8 scanlines.
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1099 * This reduces the number of times for access to draw the
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1100 * cursor for each screen refresh.
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1101 * Each pattern is a bitmap of 64 bit wide and 64 bit high
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1102 * (total of 8192 bits or 1024 bytes). The two patterns are
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1103 * stored in such a way that pattern 0 always resides in the
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1104 * lower half (least significant 64 bits) of a 128 bit word
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1105 * and pattern 1 the upper half. If you examine the data of
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1106 * the cursor image the graphics card uses then from the
25985edcedea639 drivers/video/tdfxfb.c Lucas De Marchi 2011-03-30 1107 * beginning you see line one of pattern 0, line one of
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1108 * pattern 1, line two of pattern 0, line two of pattern 1,
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1109 * etc etc. The linear stride for the cursor is always 16 bytes
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1110 * (128 bits) which is the maximum cursor width times two for
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1111 * the two monochrome patterns.
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1112 */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1113 u8 __iomem *cursorbase = info->screen_base + info->fix.smem_len;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1114 u8 *bitmap = (u8 *)cursor->image.data;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1115 u8 *mask = (u8 *)cursor->mask;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1116 int i;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1117
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 @1118 fb_memset(cursorbase, 0, 1024);
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1119
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1120 for (i = 0; i < cursor->image.height; i++) {
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1121 int h = 0;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1122 int j = (cursor->image.width + 7) >> 3;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1123
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1124 for (; j > 0; j--) {
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1125 u8 data = *mask ^ *bitmap;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1126 if (cursor->rop == ROP_COPY)
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1127 data = *mask & *bitmap;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1128 /* Pattern 0. Copy the cursor mask to it */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1129 fb_writeb(*mask, cursorbase + h);
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1130 mask++;
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1131 /* Pattern 1. Copy the cursor bitmap to it */
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1132 fb_writeb(data, cursorbase + h + 8);
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1133 bitmap++;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1134 h++;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1135 }
90b0f08536531ab drivers/video/tdfxfb.c Krzysztof Helt 2007-10-16 1136 cursorbase += 16;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1137 }
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1138 }
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1139 return 0;
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1140 }
^1da177e4c3f415 drivers/video/tdfxfb.c Linus Torvalds 2005-04-16 1141
:::::: The code at line 1118 was first introduced by commit
:::::: 90b0f08536531abbbe7b5d4944792da08cadde01 tdfxfb: hardware cursor
:::::: TO: Krzysztof Helt <krzysztof.h1@...pl>
:::::: CC: Linus Torvalds <torvalds@...dy.linux-foundation.org>
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