[PATCH] EDAC: Add memory scrubbing controls API to core

[linux-2.6-omap-h63xx.git] / drivers / edac / edac_mc.c

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 1b4fc922180386cd4107ec42f4328b4f50584be4..1df8c0c5d40aa1fd585410d639375cd8c47e73eb 100644 (file)
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -927,6 +927,57 @@ static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
        return count;
 }
 
+/* memory scrubbing */
+static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
+                                       const char *data, size_t count)
+{
+       u32 bandwidth = -1;
+
+       if (mci->set_sdram_scrub_rate) {
+
+               memctrl_int_store(&bandwidth, data, count);
+
+               if (!(*mci->set_sdram_scrub_rate)(mci, &bandwidth)) {
+                       edac_printk(KERN_DEBUG, EDAC_MC,
+                               "Scrub rate set successfully, applied: %d\n",
+                               bandwidth);
+               } else {
+                       /* FIXME: error codes maybe? */
+                       edac_printk(KERN_DEBUG, EDAC_MC,
+                               "Scrub rate set FAILED, could not apply: %d\n",
+                               bandwidth);
+               }
+       } else {
+               /* FIXME: produce "not implemented" ERROR for user-side. */
+               edac_printk(KERN_WARNING, EDAC_MC,
+                       "Memory scrubbing 'set'control is not implemented!\n");
+       }
+       return count;
+}
+
+static ssize_t mci_sdram_scrub_rate_show(struct mem_ctl_info *mci, char *data)
+{
+       u32 bandwidth = -1;
+
+       if (mci->get_sdram_scrub_rate) {
+               if (!(*mci->get_sdram_scrub_rate)(mci, &bandwidth)) {
+                       edac_printk(KERN_DEBUG, EDAC_MC,
+                               "Scrub rate successfully, fetched: %d\n",
+                               bandwidth);
+               } else {
+                       /* FIXME: error codes maybe? */
+                       edac_printk(KERN_DEBUG, EDAC_MC,
+                               "Scrub rate fetch FAILED, got: %d\n",
+                               bandwidth);
+               }
+       } else {
+               /* FIXME: produce "not implemented" ERROR for user-side.  */
+               edac_printk(KERN_WARNING, EDAC_MC,
+                       "Memory scrubbing 'get' control is not implemented!\n");
+       }
+       return sprintf(data, "%d\n", bandwidth);
+}
+
 /* default attribute files for the MCI object */
 static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
 {
@@ -1033,6 +1084,9 @@ MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
 MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
 MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
 
+/* memory scrubber attribute file */
+MCIDEV_ATTR(sdram_scrub_rate,S_IRUGO|S_IWUSR,mci_sdram_scrub_rate_show,mci_sdram_scrub_rate_store);
+
 static struct mcidev_attribute *mci_attr[] = {
        &mci_attr_reset_counters,
        &mci_attr_mc_name,
@@ -1042,6 +1096,7 @@ static struct mcidev_attribute *mci_attr[] = {
        &mci_attr_ce_noinfo_count,
        &mci_attr_ue_count,
        &mci_attr_ce_count,
+       &mci_attr_sdram_scrub_rate,
        NULL
 };