edac: correct i82975x error-info reported

to edac-core

fix the totally wrong info w.r.t page,row,dimm-label previously reported to
edac-core by i82975x driver

Signed-off-by: Arvind R. <arvino55@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 37 insertions, 16 deletions

diff --git a/drivers/edac/i82975x_edac.c b/drivers/edac/i82975x_edac.c
index 37849625647f..92e65e7038e9 100644
--- a/drivers/edac/i82975x_edac.c
+++ b/drivers/edac/i82975x_edac.c
@@ -278,6 +278,7 @@ static int i82975x_process_error_info(struct mem_ctl_info *mci,
                 struct i82975x_error_info *info, int handle_errors)
 {
         int row, multi_chan, chan;
+        unsigned long offst, page;
 
         multi_chan = mci->csrows[0].nr_channels - 1;
 
@@ -292,17 +293,19 @@ static int i82975x_process_error_info(struct mem_ctl_info *mci,
                 info->errsts = info->errsts2;
         }
 
-        chan = info->eap & 1;
-        info->eap >>= 1;
-        if (info->xeap )
-                info->eap |= 0x80000000;
-        info->eap >>= PAGE_SHIFT;
-        row = edac_mc_find_csrow_by_page(mci, info->eap);
+        page = (unsigned long) info->eap;
+        if (info->xeap & 1)
+                page |= 0x100000000ul;
+        chan = page & 1;
+        page >>= 1;
+        offst = page & ((1 << PAGE_SHIFT) - 1);
+        page >>= PAGE_SHIFT;
+        row = edac_mc_find_csrow_by_page(mci, page);
 
         if (info->errsts & 0x0002)
-                edac_mc_handle_ue(mci, info->eap, 0, row, "i82975x UE");
+                edac_mc_handle_ue(mci, page, offst , row, "i82975x UE");
         else
-                edac_mc_handle_ce(mci, info->eap, 0, info->derrsyn, row,
+                edac_mc_handle_ce(mci, page, offst, info->derrsyn, row,
                                 multi_chan ? chan : 0,
                                 "i82975x CE");
 
@@ -352,11 +355,15 @@ static enum dev_type i82975x_dram_type(void __iomem *mch_window, int rank)
 static void i82975x_init_csrows(struct mem_ctl_info *mci,
                 struct pci_dev *pdev, void __iomem *mch_window)
 {
+        static const char *labels[4] = {
+                                                        "DIMM A1", "DIMM A2",
+                                                        "DIMM B1", "DIMM B2"
+                                                };
         struct csrow_info *csrow;
         unsigned long last_cumul_size;
         u8 value;
         u32 cumul_size;
-        int index;
+        int index, chan;
 
         last_cumul_size = 0;
 
@@ -365,11 +372,7 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
          * The dram row boundary (DRB) reg values are boundary address
          * for each DRAM row with a granularity of 32 or 64MB (single/dual
          * channel operation).  DRB regs are cumulative; therefore DRB7 will
-         * contain the total memory contained in all eight rows.
-         *
-         * FIXME:
-         *  EDAC currently works for Dual-channel Interleaved configuration.
-         *  Other configurations, which the chip supports, need fixing/testing.
+         * contain the total memory contained in all rows.
          *
          */
 
@@ -380,8 +383,26 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
                                         ((index >= 4) ? 0x80 : 0));
                 cumul_size = value;
                 cumul_size <<= (I82975X_DRB_SHIFT - PAGE_SHIFT);
+                /*
+                 * Adjust cumul_size w.r.t number of channels
+                 *
+                 */
+                if (csrow->nr_channels > 1)
+                        cumul_size <<= 1;
                 debugf3("%s(): (%d) cumul_size 0x%x\n", __func__, index,
                         cumul_size);
+
+                /*
+                 * Initialise dram labels
+                 * index values:
+                 *   [0-7] for single-channel; i.e. csrow->nr_channels = 1
+                 *   [0-3] for dual-channel; i.e. csrow->nr_channels = 2
+                 */
+                for (chan = 0; chan < csrow->nr_channels; chan++)
+                        strncpy(csrow->channels[chan].label,
+                                        labels[(index >> 1) + (chan * 2)],
+                                        EDAC_MC_LABEL_LEN);
+
                 if (cumul_size == last_cumul_size)
                         continue;       /* not populated */
 
@@ -389,8 +410,8 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
                 csrow->last_page = cumul_size - 1;
                 csrow->nr_pages = cumul_size - last_cumul_size;
                 last_cumul_size = cumul_size;
-                csrow->grain = 1 << 7;  /* I82975X_EAP has 128B resolution */
-                csrow->mtype = MEM_DDR; /* i82975x supports only DDR2 */
+                csrow->grain = 1 << 6;  /* I82975X_EAP has 64B resolution */
+                csrow->mtype = MEM_DDR2; /* I82975x supports only DDR2 */
                 csrow->dtype = i82975x_dram_type(mch_window, index);
                 csrow->edac_mode = EDAC_SECDED; /* only supported */
         }