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path: root/drivers/edac/i3200_edac.c
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Diffstat (limited to 'drivers/edac/i3200_edac.c')
-rw-r--r--drivers/edac/i3200_edac.c37
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/edac/i3200_edac.c b/drivers/edac/i3200_edac.c
index 4e8337602e78..aa44c1718f50 100644
--- a/drivers/edac/i3200_edac.c
+++ b/drivers/edac/i3200_edac.c
@@ -106,16 +106,26 @@ static int nr_channels;
static int how_many_channels(struct pci_dev *pdev)
{
+ int n_channels;
+
unsigned char capid0_8b; /* 8th byte of CAPID0 */
pci_read_config_byte(pdev, I3200_CAPID0 + 8, &capid0_8b);
+
if (capid0_8b & 0x20) { /* check DCD: Dual Channel Disable */
edac_dbg(0, "In single channel mode\n");
- return 1;
+ n_channels = 1;
} else {
edac_dbg(0, "In dual channel mode\n");
- return 2;
+ n_channels = 2;
}
+
+ if (capid0_8b & 0x10) /* check if both channels are filled */
+ edac_dbg(0, "2 DIMMS per channel disabled\n");
+ else
+ edac_dbg(0, "2 DIMMS per channel enabled\n");
+
+ return n_channels;
}
static unsigned long eccerrlog_syndrome(u64 log)
@@ -290,6 +300,8 @@ static void i3200_get_drbs(void __iomem *window,
for (i = 0; i < I3200_RANKS_PER_CHANNEL; i++) {
drbs[0][i] = readw(window + I3200_C0DRB + 2*i) & I3200_DRB_MASK;
drbs[1][i] = readw(window + I3200_C1DRB + 2*i) & I3200_DRB_MASK;
+
+ edac_dbg(0, "drb[0][%d] = %d, drb[1][%d] = %d\n", i, drbs[0][i], i, drbs[1][i]);
}
}
@@ -311,6 +323,9 @@ static unsigned long drb_to_nr_pages(
int n;
n = drbs[channel][rank];
+ if (!n)
+ return 0;
+
if (rank > 0)
n -= drbs[channel][rank - 1];
if (stacked && (channel == 1) &&
@@ -377,19 +392,19 @@ static int i3200_probe1(struct pci_dev *pdev, int dev_idx)
* cumulative; the last one will contain the total memory
* contained in all ranks.
*/
- for (i = 0; i < mci->nr_csrows; i++) {
+ for (i = 0; i < I3200_DIMMS; i++) {
unsigned long nr_pages;
- struct csrow_info *csrow = mci->csrows[i];
- nr_pages = drb_to_nr_pages(drbs, stacked,
- i / I3200_RANKS_PER_CHANNEL,
- i % I3200_RANKS_PER_CHANNEL);
+ for (j = 0; j < nr_channels; j++) {
+ struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
+ mci->n_layers, i, j, 0);
- if (nr_pages == 0)
- continue;
+ nr_pages = drb_to_nr_pages(drbs, stacked, j, i);
+ if (nr_pages == 0)
+ continue;
- for (j = 0; j < nr_channels; j++) {
- struct dimm_info *dimm = csrow->channels[j]->dimm;
+ edac_dbg(0, "csrow %d, channel %d%s, size = %ld Mb\n", i, j,
+ stacked ? " (stacked)" : "", PAGES_TO_MiB(nr_pages));
dimm->nr_pages = nr_pages;
dimm->grain = nr_pages << PAGE_SHIFT;