i7core_edac: Don't enable memory scrubbing for Xeon 35xx

Xeon 35xx doesn't mention memory scrub. It seems that only Xeon 55xx
and above supports it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 0c02486cf57aa2d443ccfa99f7c563fc9702a940..aeb01f42ffef8a8ee50adf1cab1789a736e2209c 100644 (file)
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -263,7 +263,7 @@ struct i7core_pvt {
        unsigned long   rdimm_ce_count[NUM_CHANS][MAX_DIMMS];
        int             rdimm_last_ce_count[NUM_CHANS][MAX_DIMMS];
 
-       unsigned int    is_registered;
+       bool            is_registered, enable_scrub;
 
        /* mcelog glue */
        struct edac_mce         edac_mce;
@@ -1487,8 +1487,10 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
        struct i7core_pvt *pvt = mci->pvt_info;
        struct pci_dev *pdev;
        int i, func, slot;
+       char *family;
 
-       pvt->is_registered = 0;
+       pvt->is_registered = false;
+       pvt->enable_scrub  = false;
        for (i = 0; i < i7core_dev->n_devs; i++) {
                pdev = i7core_dev->pdev[i];
                if (!pdev)
@@ -1504,9 +1506,37 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
                        if (unlikely(func > MAX_CHAN_FUNC))
                                goto error;
                        pvt->pci_ch[slot - 4][func] = pdev;
-               } else if (!slot && !func)
+               } else if (!slot && !func) {
                        pvt->pci_noncore = pdev;
-               else
+
+                       /* Detect the processor family */
+                       switch (pdev->device) {
+                       case PCI_DEVICE_ID_INTEL_I7_NONCORE:
+                               family = "Xeon 35xx/ i7core";
+                               pvt->enable_scrub = false;
+                               break;
+                       case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_ALT:
+                               family = "i7-800/i5-700";
+                               pvt->enable_scrub = false;
+                               break;
+                       case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE:
+                               family = "Xeon 34xx";
+                               pvt->enable_scrub = false;
+                               break;
+                       case PCI_DEVICE_ID_INTEL_I7_NONCORE_ALT:
+                               family = "Xeon 55xx";
+                               pvt->enable_scrub = true;
+                               break;
+                       case PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_REV2:
+                               family = "Xeon 56xx / i7-900";
+                               pvt->enable_scrub = true;
+                               break;
+                       default:
+                               family = "unknown";
+                               pvt->enable_scrub = false;
+                       }
+                       debugf0("Detected a processor type %s\n", family);
+               } else
                        goto error;
 
                debugf0("Associated fn %d.%d, dev = %p, socket %d\n",
@@ -1515,7 +1545,7 @@ static int mci_bind_devs(struct mem_ctl_info *mci,
 
                if (PCI_SLOT(pdev->devfn) == 3 &&
                        PCI_FUNC(pdev->devfn) == 2)
-                       pvt->is_registered = 1;
+                       pvt->is_registered = true;
        }
 
        return 0;
@@ -2060,7 +2090,8 @@ static void i7core_unregister_mci(struct i7core_dev *i7core_dev)
                __func__, mci, &i7core_dev->pdev[0]->dev);
 
        /* Disable scrubrate setting */
-       disable_sdram_scrub_setting(mci);
+       if (pvt->enable_scrub)
+               disable_sdram_scrub_setting(mci);
 
        /* Disable MCE NMI handler */
        edac_mce_unregister(&pvt->edac_mce);
@@ -2136,7 +2167,8 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
        mci->edac_check = i7core_check_error;
 
        /* Enable scrubrate setting */
-       enable_sdram_scrub_setting(mci);
+       if (pvt->enable_scrub)
+               enable_sdram_scrub_setting(mci);
 
        /* add this new MC control structure to EDAC's list of MCs */
        if (unlikely(edac_mc_add_mc(mci))) {