diff options
| author | Thor Thayer <thor.thayer@linux.intel.com> | 2019-03-26 16:29:30 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-03-29 11:35:39 +0100 |
| commit | 436b0a583af0497b4b84cb73c12f8bd620f868af (patch) | |
| tree | 6775d2037d9a2b3058ed30f493308f27fe681763 /drivers/edac | |
| parent | fc00c6a416381010c4a721a4142ddd0260d68f20 (diff) | |
| download | linux-436b0a583af0497b4b84cb73c12f8bd620f868af.tar.bz2 | |
EDAC/altera: Do less intrusive error injection
Improve the Arria10 and Stratix10 error injection routine
by reading the data and changing just 1 bit before writing
back out. Previous routine would overwrite the first bytes
to 0 then change 1 bit but this method is less intrusive.
Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: James Morse <james.morse@arm.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: https://lkml.kernel.org/r/1553635771-32693-1-git-send-email-thor.thayer@linux.intel.com
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/altera_edac.c | 30 | ||||
| -rw-r--r-- | drivers/edac/altera_edac.h | 2 |
2 files changed, 14 insertions, 18 deletions
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c index 5ff263850cc7..acb3006df631 100644 --- a/drivers/edac/altera_edac.c +++ b/drivers/edac/altera_edac.c @@ -1762,28 +1762,24 @@ static ssize_t altr_edac_a10_device_trig2(struct file *file, if (trig_type == ALTR_UE_TRIGGER_CHAR) { writel(priv->ue_set_mask, set_addr); } else { - /* Setup write of 0 to first 4 bytes */ - writel(0x0, drvdata->base + ECC_BLK_WDATA0_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA1_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA2_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA3_OFST); - /* Setup write of 4 bytes */ + /* Setup read/write of 4 bytes */ writel(ECC_WORD_WRITE, drvdata->base + ECC_BLK_DBYTECTRL_OFST); /* Setup Address to 0 */ - writel(0x0, drvdata->base + ECC_BLK_ADDRESS_OFST); - /* Setup accctrl to write & data override */ - writel(ECC_WRITE_DOVR, drvdata->base + ECC_BLK_ACCCTRL_OFST); - /* Kick it. */ - writel(ECC_XACT_KICK, drvdata->base + ECC_BLK_STARTACC_OFST); - /* Setup accctrl to read & ecc override */ - writel(ECC_READ_EOVR, drvdata->base + ECC_BLK_ACCCTRL_OFST); + writel(0, drvdata->base + ECC_BLK_ADDRESS_OFST); + /* Setup accctrl to read & ecc & data override */ + writel(ECC_READ_EDOVR, drvdata->base + ECC_BLK_ACCCTRL_OFST); /* Kick it. */ writel(ECC_XACT_KICK, drvdata->base + ECC_BLK_STARTACC_OFST); /* Setup write for single bit change */ - writel(0x1, drvdata->base + ECC_BLK_WDATA0_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA1_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA2_OFST); - writel(0x0, drvdata->base + ECC_BLK_WDATA3_OFST); + writel(readl(drvdata->base + ECC_BLK_RDATA0_OFST) ^ 0x1, + drvdata->base + ECC_BLK_WDATA0_OFST); + writel(readl(drvdata->base + ECC_BLK_RDATA1_OFST), + drvdata->base + ECC_BLK_WDATA1_OFST); + writel(readl(drvdata->base + ECC_BLK_RDATA2_OFST), + drvdata->base + ECC_BLK_WDATA2_OFST); + writel(readl(drvdata->base + ECC_BLK_RDATA3_OFST), + drvdata->base + ECC_BLK_WDATA3_OFST); + /* Copy Read ECC to Write ECC */ writel(readl(drvdata->base + ECC_BLK_RECC0_OFST), drvdata->base + ECC_BLK_WECC0_OFST); diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h index 60513f201ffb..1532ec9c3510 100644 --- a/drivers/edac/altera_edac.h +++ b/drivers/edac/altera_edac.h @@ -321,7 +321,7 @@ struct altr_sdram_mc_data { #define ECC_BLK_STARTACC_OFST 0x7C #define ECC_XACT_KICK 0x10000 -#define ECC_WORD_WRITE 0xF +#define ECC_WORD_WRITE 0xFF #define ECC_WRITE_DOVR 0x101 #define ECC_WRITE_EDOVR 0x103 #define ECC_READ_EOVR 0x2 |