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authorNiklas Söderlund <niklas.soderlund@ericsson.com>2012-08-08 19:30:57 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-02-21 18:06:33 +0400
commit53ceafd6a27f3e15dc83e8865f9f20029f6dfc66 (patch)
tree60fce8eb39210959f30fe008af04d3308167075b /drivers/edac
parent52608ba20546139dc76cca8a46c1d901455d5450 (diff)
downloadlinux-53ceafd6a27f3e15dc83e8865f9f20029f6dfc66.tar.xz
i5100_edac: add fault injection code
Add fault injection based on information datasheet for i5100, see 1. In addition to the i5100 datasheet some missing information on injection functions where found through experimentation and the i7300 datasheet, see 2. [1] Intel 5100 Memory Controller Hub Chipset Doc.Nr: 318378 http://www.intel.com/content/dam/doc/datasheet/5100- memory-controller-hub-chipset-datasheet.pdf [2] Intel 7300 Chipset MemoryController Hub (MCH) Doc.Nr: 318082 http://www.intel.com/assets/pdf/datasheet/318082.pdf Signed-off-by: Niklas Söderlund <niklas.soderlund@ericsson.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/i5100_edac.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index 33c5c8e663f2..0a0345bd7432 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -68,6 +68,14 @@
I5100_FERR_NF_MEM_M1ERR_MASK)
#define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */
#define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */
+#define I5100_MEM0EINJMSK0 0x200 /* Injection Mask0 Register Channel 0 */
+#define I5100_MEM1EINJMSK0 0x208 /* Injection Mask0 Register Channel 1 */
+#define I5100_MEMXEINJMSK0_EINJEN (1 << 27)
+#define I5100_MEM0EINJMSK1 0x204 /* Injection Mask1 Register Channel 0 */
+#define I5100_MEM1EINJMSK1 0x206 /* Injection Mask1 Register Channel 1 */
+
+/* Device 19, Function 0 */
+#define I5100_DINJ0 0x9a
/* device 21 and 22, func 0 */
#define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */
@@ -344,6 +352,14 @@ struct i5100_priv {
struct delayed_work i5100_scrubbing;
int scrub_enable;
+
+ /* Error injection */
+ u8 inject_channel;
+ u8 inject_hlinesel;
+ u8 inject_deviceptr1;
+ u8 inject_deviceptr2;
+ u16 inject_eccmask1;
+ u16 inject_eccmask2;
};
/* map a rank/chan to a slot number on the mainboard */
@@ -864,6 +880,70 @@ static void i5100_init_csrows(struct mem_ctl_info *mci)
}
}
+/****************************************************************************
+ * Error injection routines
+ ****************************************************************************/
+
+static void i5100_do_inject(struct mem_ctl_info *mci)
+{
+ struct i5100_priv *priv = mci->pvt_info;
+ u32 mask0;
+ u16 mask1;
+
+ /* MEM[1:0]EINJMSK0
+ * 31 - ADDRMATCHEN
+ * 29:28 - HLINESEL
+ * 00 Reserved
+ * 01 Lower half of cache line
+ * 10 Upper half of cache line
+ * 11 Both upper and lower parts of cache line
+ * 27 - EINJEN
+ * 25:19 - XORMASK1 for deviceptr1
+ * 9:5 - SEC2RAM for deviceptr2
+ * 4:0 - FIR2RAM for deviceptr1
+ */
+ mask0 = ((priv->inject_hlinesel & 0x3) << 28) |
+ I5100_MEMXEINJMSK0_EINJEN |
+ ((priv->inject_eccmask1 & 0xffff) << 10) |
+ ((priv->inject_deviceptr2 & 0x1f) << 5) |
+ (priv->inject_deviceptr1 & 0x1f);
+
+ /* MEM[1:0]EINJMSK1
+ * 15:0 - XORMASK2 for deviceptr2
+ */
+ mask1 = priv->inject_eccmask2;
+
+ if (priv->inject_channel == 0) {
+ pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0);
+ pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1);
+ } else {
+ pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0);
+ pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1);
+ }
+
+ /* Error Injection Response Function
+ * Intel 5100 Memory Controller Hub Chipset (318378) datasheet
+ * hints about this register but carry no data about them. All
+ * data regarding device 19 is based on experimentation and the
+ * Intel 7300 Chipset Memory Controller Hub (318082) datasheet
+ * which appears to be accurate for the i5100 in this area.
+ *
+ * The injection code don't work without setting this register.
+ * The register needs to be flipped off then on else the hardware
+ * will only preform the first injection.
+ *
+ * Stop condition bits 7:4
+ * 1010 - Stop after one injection
+ * 1011 - Never stop injecting faults
+ *
+ * Start condition bits 3:0
+ * 1010 - Never start
+ * 1011 - Start immediately
+ */
+ pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa);
+ pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab);
+}
+
static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
int rc;
@@ -993,6 +1073,13 @@ static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
mci->set_sdram_scrub_rate = i5100_set_scrub_rate;
mci->get_sdram_scrub_rate = i5100_get_scrub_rate;
+ priv->inject_channel = 0;
+ priv->inject_hlinesel = 0;
+ priv->inject_deviceptr1 = 0;
+ priv->inject_deviceptr2 = 0;
+ priv->inject_eccmask1 = 0;
+ priv->inject_eccmask2 = 0;
+
i5100_init_csrows(mci);
/* this strange construction seems to be in every driver, dunno why */