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i7300_edac: Properly detect the type of error correction 

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2010-08-27 09:16:06 -03:00
parent bb81a21637
commit 15154c57c6
1 changed files with 14 additions and 4 deletions
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18
drivers/edac/i7300_edac.c
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@ -450,14 +450,24 @@ static int decode_mtr(struct i7300_pvt *pvt,
p_csrow->mtype = MEM_FB_DDR2;
/*
* FIXME: the type of error detection actually depends of the
* The type of error detection actually depends of the
* mode of operation. When it is just one single memory chip, at
* socket 0, channel 0, it uses 8-byte-over-32-byte SECDED+ code.
* In normal or mirrored mode, it uses Single Device Data correction,
* socket 0, channel 0, it uses 8-byte-over-32-byte SECDED+ code.
* In normal or mirrored mode, it uses Lockstep mode,
* with the possibility of using an extended algorithm for x8 memories
* See datasheet Sections 7.3.6 to 7.3.8
*/
p_csrow->edac_mode = EDAC_S8ECD8ED;
if (IS_SINGLE_MODE(pvt->mc_settings_a)) {
p_csrow->edac_mode = EDAC_SECDED;
debugf0("ECC code is 8-byte-over-32-byte SECDED+ code\n");
} else {
debugf0("ECC code is on Lockstep mode\n");
if (MTR_DRAM_WIDTH(mtr))
p_csrow->edac_mode = EDAC_S8ECD8ED;
else
p_csrow->edac_mode = EDAC_S4ECD4ED;
}
/* ask what device type on this row */
if (MTR_DRAM_WIDTH(mtr)) {