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Diffstat (limited to 'drivers/edac/e752x_edac.c')
-rw-r--r--drivers/edac/e752x_edac.c114
1 files changed, 78 insertions, 36 deletions
diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c
index 41223261ede..3186512c973 100644
--- a/drivers/edac/e752x_edac.c
+++ b/drivers/edac/e752x_edac.c
@@ -4,7 +4,11 @@
* This file may be distributed under the terms of the
* GNU General Public License.
*
- * See "enum e752x_chips" below for supported chipsets
+ * Implement support for the e7520, E7525, e7320 and i3100 memory controllers.
+ *
+ * Datasheets:
+ * http://www.intel.in/content/www/in/en/chipsets/e7525-memory-controller-hub-datasheet.html
+ * ftp://download.intel.com/design/intarch/datashts/31345803.pdf
*
* Written by Tom Zimmerman
*
@@ -13,8 +17,6 @@
* Wang Zhenyu at intel.com
* Dave Jiang at mvista.com
*
- * $Id: edac_e752x.c,v 1.5.2.11 2005/10/05 00:43:44 dsp_llnl Exp $
- *
*/
#include <linux/module.h>
@@ -187,6 +189,25 @@ enum e752x_chips {
I3100 = 3
};
+/*
+ * Those chips Support single-rank and dual-rank memories only.
+ *
+ * On e752x chips, the odd rows are present only on dual-rank memories.
+ * Dividing the rank by two will provide the dimm#
+ *
+ * i3100 MC has a different mapping: it supports only 4 ranks.
+ *
+ * The mapping is (from 1 to n):
+ * slot single-ranked double-ranked
+ * dimm #1 -> rank #4 NA
+ * dimm #2 -> rank #3 NA
+ * dimm #3 -> rank #2 Ranks 2 and 3
+ * dimm #4 -> rank $1 Ranks 1 and 4
+ *
+ * FIXME: The current mapping for i3100 considers that it supports up to 8
+ * ranks/chanel, but datasheet says that the MC supports only 4 ranks.
+ */
+
struct e752x_pvt {
struct pci_dev *bridge_ck;
struct pci_dev *dev_d0f0;
@@ -350,8 +371,10 @@ static void do_process_ce(struct mem_ctl_info *mci, u16 error_one,
channel = !(error_one & 1);
/* e752x mc reads 34:6 of the DRAM linear address */
- edac_mc_handle_ce(mci, page, offset_in_page(sec1_add << 4),
- sec1_syndrome, row, channel, "e752x CE");
+ edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
+ page, offset_in_page(sec1_add << 4), sec1_syndrome,
+ row, channel, -1,
+ "e752x CE", "", NULL);
}
static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
@@ -385,9 +408,12 @@ static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
edac_mc_find_csrow_by_page(mci, block_page);
/* e752x mc reads 34:6 of the DRAM linear address */
- edac_mc_handle_ue(mci, block_page,
- offset_in_page(error_2b << 4),
- row, "e752x UE from Read");
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
+ block_page,
+ offset_in_page(error_2b << 4), 0,
+ row, -1, -1,
+ "e752x UE from Read", "", NULL);
+
}
if (error_one & 0x0404) {
error_2b = scrb_add;
@@ -401,9 +427,11 @@ static void do_process_ue(struct mem_ctl_info *mci, u16 error_one,
edac_mc_find_csrow_by_page(mci, block_page);
/* e752x mc reads 34:6 of the DRAM linear address */
- edac_mc_handle_ue(mci, block_page,
- offset_in_page(error_2b << 4),
- row, "e752x UE from Scruber");
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
+ block_page,
+ offset_in_page(error_2b << 4), 0,
+ row, -1, -1,
+ "e752x UE from Scruber", "", NULL);
}
}
@@ -426,7 +454,9 @@ static inline void process_ue_no_info_wr(struct mem_ctl_info *mci,
return;
debugf3("%s()\n", __func__);
- edac_mc_handle_ue_no_info(mci, "e752x UE log memory write");
+ edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 0, 0, 0,
+ -1, -1, -1,
+ "e752x UE log memory write", "", NULL);
}
static void do_process_ded_retry(struct mem_ctl_info *mci, u16 error,
@@ -1044,7 +1074,7 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
int drc_drbg; /* DRB granularity 0=64mb, 1=128mb */
int drc_ddim; /* DRAM Data Integrity Mode 0=none, 2=edac */
u8 value;
- u32 dra, drc, cumul_size;
+ u32 dra, drc, cumul_size, i, nr_pages;
dra = 0;
for (index = 0; index < 4; index++) {
@@ -1053,7 +1083,7 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
dra |= dra_reg << (index * 8);
}
pci_read_config_dword(pdev, E752X_DRC, &drc);
- drc_chan = dual_channel_active(ddrcsr);
+ drc_chan = dual_channel_active(ddrcsr) ? 1 : 0;
drc_drbg = drc_chan + 1; /* 128 in dual mode, 64 in single */
drc_ddim = (drc >> 20) & 0x3;
@@ -1078,26 +1108,33 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
csrow->first_page = last_cumul_size;
csrow->last_page = cumul_size - 1;
- csrow->nr_pages = cumul_size - last_cumul_size;
+ nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
- csrow->grain = 1 << 12; /* 4KiB - resolution of CELOG */
- csrow->mtype = MEM_RDDR; /* only one type supported */
- csrow->dtype = mem_dev ? DEV_X4 : DEV_X8;
- /*
- * if single channel or x8 devices then SECDED
- * if dual channel and x4 then S4ECD4ED
- */
- if (drc_ddim) {
- if (drc_chan && mem_dev) {
- csrow->edac_mode = EDAC_S4ECD4ED;
- mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
- } else {
- csrow->edac_mode = EDAC_SECDED;
- mci->edac_cap |= EDAC_FLAG_SECDED;
- }
- } else
- csrow->edac_mode = EDAC_NONE;
+ for (i = 0; i < csrow->nr_channels; i++) {
+ struct dimm_info *dimm = csrow->channels[i].dimm;
+
+ debugf3("Initializing rank at (%i,%i)\n", index, i);
+ dimm->nr_pages = nr_pages / csrow->nr_channels;
+ dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
+ dimm->mtype = MEM_RDDR; /* only one type supported */
+ dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
+
+ /*
+ * if single channel or x8 devices then SECDED
+ * if dual channel and x4 then S4ECD4ED
+ */
+ if (drc_ddim) {
+ if (drc_chan && mem_dev) {
+ dimm->edac_mode = EDAC_S4ECD4ED;
+ mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
+ } else {
+ dimm->edac_mode = EDAC_SECDED;
+ mci->edac_cap |= EDAC_FLAG_SECDED;
+ }
+ } else
+ dimm->edac_mode = EDAC_NONE;
+ }
}
}
@@ -1226,6 +1263,7 @@ static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
u16 pci_data;
u8 stat8;
struct mem_ctl_info *mci;
+ struct edac_mc_layer layers[2];
struct e752x_pvt *pvt;
u16 ddrcsr;
int drc_chan; /* Number of channels 0=1chan,1=2chan */
@@ -1252,11 +1290,15 @@ static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
/* Dual channel = 1, Single channel = 0 */
drc_chan = dual_channel_active(ddrcsr);
- mci = edac_mc_alloc(sizeof(*pvt), E752X_NR_CSROWS, drc_chan + 1, 0);
-
- if (mci == NULL) {
+ layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
+ layers[0].size = E752X_NR_CSROWS;
+ layers[0].is_virt_csrow = true;
+ layers[1].type = EDAC_MC_LAYER_CHANNEL;
+ layers[1].size = drc_chan + 1;
+ layers[1].is_virt_csrow = false;
+ mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
+ if (mci == NULL)
return -ENOMEM;
- }
debugf3("%s(): init mci\n", __func__);
mci->mtype_cap = MEM_FLAG_RDDR;
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 09:10:13 +0000