sb_edac: isolate TOLM retrieval

This is in preparation for the Ivy Bridge support.

Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 3f8c890d79c6..bc434ad5465d 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -273,9 +273,11 @@ static const u32 correrrthrsld[] = {
 #define NUM_CHANNELS    4
 #define MAX_DIMMS       3               /* Max DIMMS per channel */
 
+struct sbridge_pvt;
 struct sbridge_info {
         u32     mcmtr;
         u32     rankcfgr;
+        u64     (*get_tolm)(struct sbridge_pvt *pvt);
 };
 
 struct sbridge_channel {
@@ -459,6 +461,15 @@ static void free_sbridge_dev(struct sbridge_dev *sbridge_dev)
         kfree(sbridge_dev);
 }
 
+static u64 sbridge_get_tolm(struct sbridge_pvt *pvt)
+{
+        u32 reg;
+
+        /* Address range is 32:28 */
+        pci_read_config_dword(pvt->pci_sad1, TOLM, &reg);
+        return GET_TOLM(reg);
+}
+
 /****************************************************************************
                         Memory check routines
  ****************************************************************************/
@@ -633,10 +644,7 @@ static void get_memory_layout(const struct mem_ctl_info *mci)
          * Step 1) Get TOLM/TOHM ranges
          */
 
-        /* Address range is 32:28 */
-        pci_read_config_dword(pvt->pci_sad1, TOLM,
-                              &reg);
-        pvt->tolm = GET_TOLM(reg);
+        pvt->tolm = pvt->info.get_tolm(pvt);
         tmp_mb = (1 + pvt->tolm) >> 20;
 
         mb = div_u64_rem(tmp_mb, 1000, &kb);
@@ -1661,6 +1669,7 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev)
         mci->ctl_name = kasprintf(GFP_KERNEL, "Sandy Bridge Socket#%d", mci->mc_idx);
         mci->dev_name = pci_name(sbridge_dev->pdev[0]);
         mci->ctl_page_to_phys = NULL;
+        pvt->info.get_tolm = sbridge_get_tolm;
 
         /* Set the function pointer to an actual operation function */
         mci->edac_check = sbridge_check_error;