diff options
author | Doug Thompson <dougthompson@xmission.com> | 2009-04-27 10:37:05 -0400 |
---|---|---|
committer | Borislav Petkov <borislav.petkov@amd.com> | 2009-06-10 06:18:58 -0400 |
commit | b1289d6f9d23abab396077abb65d5a23a775cdb0 (patch) | |
tree | 1e201814500c9cce1f6a83b26dc86156c833e5de /drivers | |
parent | 4d37607adbff69596a3170cf84badaf26efc59ac (diff) |
amd64_edac: add ECC chipkill syndrome mapping table
Borislav:
- fix comments
- cleanup debug calls
Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/edac/amd64_edac.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index e5f4a92faa3b..feb4986ea76d 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c | |||
@@ -1895,4 +1895,139 @@ static struct pci_dev *pci_get_related_function(unsigned int vendor, | |||
1895 | return dev; | 1895 | return dev; |
1896 | } | 1896 | } |
1897 | 1897 | ||
1898 | /* | ||
1899 | * syndrome mapping table for ECC ChipKill devices | ||
1900 | * | ||
1901 | * The comment in each row is the token (nibble) number that is in error. | ||
1902 | * The least significant nibble of the syndrome is the mask for the bits | ||
1903 | * that are in error (need to be toggled) for the particular nibble. | ||
1904 | * | ||
1905 | * Each row contains 16 entries. | ||
1906 | * The first entry (0th) is the channel number for that row of syndromes. | ||
1907 | * The remaining 15 entries are the syndromes for the respective Error | ||
1908 | * bit mask index. | ||
1909 | * | ||
1910 | * 1st index entry is 0x0001 mask, indicating that the rightmost bit is the | ||
1911 | * bit in error. | ||
1912 | * The 2nd index entry is 0x0010 that the second bit is damaged. | ||
1913 | * The 3rd index entry is 0x0011 indicating that the rightmost 2 bits | ||
1914 | * are damaged. | ||
1915 | * Thus so on until index 15, 0x1111, whose entry has the syndrome | ||
1916 | * indicating that all 4 bits are damaged. | ||
1917 | * | ||
1918 | * A search is performed on this table looking for a given syndrome. | ||
1919 | * | ||
1920 | * See the AMD documentation for ECC syndromes. This ECC table is valid | ||
1921 | * across all the versions of the AMD64 processors. | ||
1922 | * | ||
1923 | * A fast lookup is to use the LAST four bits of the 16-bit syndrome as a | ||
1924 | * COLUMN index, then search all ROWS of that column, looking for a match | ||
1925 | * with the input syndrome. The ROW value will be the token number. | ||
1926 | * | ||
1927 | * The 0'th entry on that row, can be returned as the CHANNEL (0 or 1) of this | ||
1928 | * error. | ||
1929 | */ | ||
1930 | #define NUMBER_ECC_ROWS 36 | ||
1931 | static const unsigned short ecc_chipkill_syndromes[NUMBER_ECC_ROWS][16] = { | ||
1932 | /* Channel 0 syndromes */ | ||
1933 | {/*0*/ 0, 0xe821, 0x7c32, 0x9413, 0xbb44, 0x5365, 0xc776, 0x2f57, | ||
1934 | 0xdd88, 0x35a9, 0xa1ba, 0x499b, 0x66cc, 0x8eed, 0x1afe, 0xf2df }, | ||
1935 | {/*1*/ 0, 0x5d31, 0xa612, 0xfb23, 0x9584, 0xc8b5, 0x3396, 0x6ea7, | ||
1936 | 0xeac8, 0xb7f9, 0x4cda, 0x11eb, 0x7f4c, 0x227d, 0xd95e, 0x846f }, | ||
1937 | {/*2*/ 0, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, | ||
1938 | 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f }, | ||
1939 | {/*3*/ 0, 0x2021, 0x3032, 0x1013, 0x4044, 0x6065, 0x7076, 0x5057, | ||
1940 | 0x8088, 0xa0a9, 0xb0ba, 0x909b, 0xc0cc, 0xe0ed, 0xf0fe, 0xd0df }, | ||
1941 | {/*4*/ 0, 0x5041, 0xa082, 0xf0c3, 0x9054, 0xc015, 0x30d6, 0x6097, | ||
1942 | 0xe0a8, 0xb0e9, 0x402a, 0x106b, 0x70fc, 0x20bd, 0xd07e, 0x803f }, | ||
1943 | {/*5*/ 0, 0xbe21, 0xd732, 0x6913, 0x2144, 0x9f65, 0xf676, 0x4857, | ||
1944 | 0x3288, 0x8ca9, 0xe5ba, 0x5b9b, 0x13cc, 0xaded, 0xc4fe, 0x7adf }, | ||
1945 | {/*6*/ 0, 0x4951, 0x8ea2, 0xc7f3, 0x5394, 0x1ac5, 0xdd36, 0x9467, | ||
1946 | 0xa1e8, 0xe8b9, 0x2f4a, 0x661b, 0xf27c, 0xbb2d, 0x7cde, 0x358f }, | ||
1947 | {/*7*/ 0, 0x74e1, 0x9872, 0xec93, 0xd6b4, 0xa255, 0x4ec6, 0x3a27, | ||
1948 | 0x6bd8, 0x1f39, 0xf3aa, 0x874b, 0xbd6c, 0xc98d, 0x251e, 0x51ff }, | ||
1949 | {/*8*/ 0, 0x15c1, 0x2a42, 0x3f83, 0xcef4, 0xdb35, 0xe4b6, 0xf177, | ||
1950 | 0x4758, 0x5299, 0x6d1a, 0x78db, 0x89ac, 0x9c6d, 0xa3ee, 0xb62f }, | ||
1951 | {/*9*/ 0, 0x3d01, 0x1602, 0x2b03, 0x8504, 0xb805, 0x9306, 0xae07, | ||
1952 | 0xca08, 0xf709, 0xdc0a, 0xe10b, 0x4f0c, 0x720d, 0x590e, 0x640f }, | ||
1953 | {/*a*/ 0, 0x9801, 0xec02, 0x7403, 0x6b04, 0xf305, 0x8706, 0x1f07, | ||
1954 | 0xbd08, 0x2509, 0x510a, 0xc90b, 0xd60c, 0x4e0d, 0x3a0e, 0xa20f }, | ||
1955 | {/*b*/ 0, 0xd131, 0x6212, 0xb323, 0x3884, 0xe9b5, 0x5a96, 0x8ba7, | ||
1956 | 0x1cc8, 0xcdf9, 0x7eda, 0xafeb, 0x244c, 0xf57d, 0x465e, 0x976f }, | ||
1957 | {/*c*/ 0, 0xe1d1, 0x7262, 0x93b3, 0xb834, 0x59e5, 0xca56, 0x2b87, | ||
1958 | 0xdc18, 0x3dc9, 0xae7a, 0x4fab, 0x542c, 0x85fd, 0x164e, 0xf79f }, | ||
1959 | {/*d*/ 0, 0x6051, 0xb0a2, 0xd0f3, 0x1094, 0x70c5, 0xa036, 0xc067, | ||
1960 | 0x20e8, 0x40b9, 0x904a, 0x601b, 0x307c, 0x502d, 0x80de, 0xe08f }, | ||
1961 | {/*e*/ 0, 0xa4c1, 0xf842, 0x5c83, 0xe6f4, 0x4235, 0x1eb6, 0xba77, | ||
1962 | 0x7b58, 0xdf99, 0x831a, 0x27db, 0x9dac, 0x396d, 0x65ee, 0xc12f }, | ||
1963 | {/*f*/ 0, 0x11c1, 0x2242, 0x3383, 0xc8f4, 0xd935, 0xeab6, 0xfb77, | ||
1964 | 0x4c58, 0x5d99, 0x6e1a, 0x7fdb, 0x84ac, 0x956d, 0xa6ee, 0xb72f }, | ||
1965 | |||
1966 | /* Channel 1 syndromes */ | ||
1967 | {/*10*/ 1, 0x45d1, 0x8a62, 0xcfb3, 0x5e34, 0x1be5, 0xd456, 0x9187, | ||
1968 | 0xa718, 0xe2c9, 0x2d7a, 0x68ab, 0xf92c, 0xbcfd, 0x734e, 0x369f }, | ||
1969 | {/*11*/ 1, 0x63e1, 0xb172, 0xd293, 0x14b4, 0x7755, 0xa5c6, 0xc627, | ||
1970 | 0x28d8, 0x4b39, 0x99aa, 0xfa4b, 0x3c6c, 0x5f8d, 0x8d1e, 0xeeff }, | ||
1971 | {/*12*/ 1, 0xb741, 0xd982, 0x6ec3, 0x2254, 0x9515, 0xfbd6, 0x4c97, | ||
1972 | 0x33a8, 0x84e9, 0xea2a, 0x5d6b, 0x11fc, 0xa6bd, 0xc87e, 0x7f3f }, | ||
1973 | {/*13*/ 1, 0xdd41, 0x6682, 0xbbc3, 0x3554, 0xe815, 0x53d6, 0xce97, | ||
1974 | 0x1aa8, 0xc7e9, 0x7c2a, 0xa1fb, 0x2ffc, 0xf2bd, 0x497e, 0x943f }, | ||
1975 | {/*14*/ 1, 0x2bd1, 0x3d62, 0x16b3, 0x4f34, 0x64e5, 0x7256, 0x5987, | ||
1976 | 0x8518, 0xaec9, 0xb87a, 0x93ab, 0xca2c, 0xe1fd, 0xf74e, 0xdc9f }, | ||
1977 | {/*15*/ 1, 0x83c1, 0xc142, 0x4283, 0xa4f4, 0x2735, 0x65b6, 0xe677, | ||
1978 | 0xf858, 0x7b99, 0x391a, 0xbadb, 0x5cac, 0xdf6d, 0x9dee, 0x1e2f }, | ||
1979 | {/*16*/ 1, 0x8fd1, 0xc562, 0x4ab3, 0xa934, 0x26e5, 0x6c56, 0xe387, | ||
1980 | 0xfe18, 0x71c9, 0x3b7a, 0xb4ab, 0x572c, 0xd8fd, 0x924e, 0x1d9f }, | ||
1981 | {/*17*/ 1, 0x4791, 0x89e2, 0xce73, 0x5264, 0x15f5, 0xdb86, 0x9c17, | ||
1982 | 0xa3b8, 0xe429, 0x2a5a, 0x6dcb, 0xf1dc, 0xb64d, 0x783e, 0x3faf }, | ||
1983 | {/*18*/ 1, 0x5781, 0xa9c2, 0xfe43, 0x92a4, 0xc525, 0x3b66, 0x6ce7, | ||
1984 | 0xe3f8, 0xb479, 0x4a3a, 0x1dbb, 0x715c, 0x26dd, 0xd89e, 0x8f1f }, | ||
1985 | {/*19*/ 1, 0xbf41, 0xd582, 0x6ac3, 0x2954, 0x9615, 0xfcd6, 0x4397, | ||
1986 | 0x3ea8, 0x81e9, 0xeb2a, 0x546b, 0x17fc, 0xa8bd, 0xc27e, 0x7d3f }, | ||
1987 | {/*1a*/ 1, 0x9891, 0xe1e2, 0x7273, 0x6464, 0xf7f5, 0x8586, 0x1617, | ||
1988 | 0xb8b8, 0x2b29, 0x595a, 0xcacb, 0xdcdc, 0x4f4d, 0x3d3e, 0xaeaf }, | ||
1989 | {/*1b*/ 1, 0xcce1, 0x4472, 0x8893, 0xfdb4, 0x3f55, 0xb9c6, 0x7527, | ||
1990 | 0x56d8, 0x9a39, 0x12aa, 0xde4b, 0xab6c, 0x678d, 0xef1e, 0x23ff }, | ||
1991 | {/*1c*/ 1, 0xa761, 0xf9b2, 0x5ed3, 0xe214, 0x4575, 0x1ba6, 0xbcc7, | ||
1992 | 0x7328, 0xd449, 0x8a9a, 0x2dfb, 0x913c, 0x365d, 0x688e, 0xcfef }, | ||
1993 | {/*1d*/ 1, 0xff61, 0x55b2, 0xaad3, 0x7914, 0x8675, 0x2ca6, 0xd3c7, | ||
1994 | 0x9e28, 0x6149, 0xcb9a, 0x34fb, 0xe73c, 0x185d, 0xb28e, 0x4def }, | ||
1995 | {/*1e*/ 1, 0x5451, 0xa8a2, 0xfcf3, 0x9694, 0xc2c5, 0x3e36, 0x6a67, | ||
1996 | 0xebe8, 0xbfb9, 0x434a, 0x171b, 0x7d7c, 0x292d, 0xd5de, 0x818f }, | ||
1997 | {/*1f*/ 1, 0x6fc1, 0xb542, 0xda83, 0x19f4, 0x7635, 0xacb6, 0xc377, | ||
1998 | 0x2e58, 0x4199, 0x9b1a, 0xf4db, 0x37ac, 0x586d, 0x82ee, 0xed2f }, | ||
1999 | |||
2000 | /* ECC bits are also in the set of tokens and they too can go bad | ||
2001 | * first 2 cover channel 0, while the second 2 cover channel 1 | ||
2002 | */ | ||
2003 | {/*20*/ 0, 0xbe01, 0xd702, 0x6903, 0x2104, 0x9f05, 0xf606, 0x4807, | ||
2004 | 0x3208, 0x8c09, 0xe50a, 0x5b0b, 0x130c, 0xad0d, 0xc40e, 0x7a0f }, | ||
2005 | {/*21*/ 0, 0x4101, 0x8202, 0xc303, 0x5804, 0x1905, 0xda06, 0x9b07, | ||
2006 | 0xac08, 0xed09, 0x2e0a, 0x6f0b, 0x640c, 0xb50d, 0x760e, 0x370f }, | ||
2007 | {/*22*/ 1, 0xc441, 0x4882, 0x8cc3, 0xf654, 0x3215, 0xbed6, 0x7a97, | ||
2008 | 0x5ba8, 0x9fe9, 0x132a, 0xd76b, 0xadfc, 0x69bd, 0xe57e, 0x213f }, | ||
2009 | {/*23*/ 1, 0x7621, 0x9b32, 0xed13, 0xda44, 0xac65, 0x4176, 0x3757, | ||
2010 | 0x6f88, 0x19a9, 0xf4ba, 0x829b, 0xb5cc, 0xc3ed, 0x2efe, 0x58df } | ||
2011 | }; | ||
2012 | |||
2013 | /* | ||
2014 | * Given the syndrome argument, scan each of the channel tables for a syndrome | ||
2015 | * match. Depending on which table it is found, return the channel number. | ||
2016 | */ | ||
2017 | static int get_channel_from_ecc_syndrome(unsigned short syndrome) | ||
2018 | { | ||
2019 | int row; | ||
2020 | int column; | ||
1898 | 2021 | ||
2022 | /* Determine column to scan */ | ||
2023 | column = syndrome & 0xF; | ||
2024 | |||
2025 | /* Scan all rows, looking for syndrome, or end of table */ | ||
2026 | for (row = 0; row < NUMBER_ECC_ROWS; row++) { | ||
2027 | if (ecc_chipkill_syndromes[row][column] == syndrome) | ||
2028 | return ecc_chipkill_syndromes[row][0]; | ||
2029 | } | ||
2030 | |||
2031 | debugf0("syndrome(%x) not found\n", syndrome); | ||
2032 | return -1; | ||
2033 | } | ||