edac: add memory types strings for debugging

Instead of using deeply-nested conditionals for dumping the DIMM type in
debug mode, add a strings array of the supported DIMM types.

This is useful in cases where an edac driver supports multiple DRAM
types and is only defined in debug builds.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

3 files changed, 26 insertions, 4 deletions

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index c403af2e0081..708d065efc95 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1024,10 +1024,7 @@ static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt)
                 type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
         }
 
-        debugf1("  Memory type is: %s\n",
-                (type == MEM_DDR2) ? "MEM_DDR2" :
-                (type == MEM_RDDR2) ? "MEM_RDDR2" :
-                (type == MEM_DDR) ? "MEM_DDR" : "MEM_RDDR");
+        debugf1("  Memory type is: %s\n", edac_mem_types[type]);
 
         return type;
 }
diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h
index 12f355cafdbe..001b2e797fb3 100644
--- a/drivers/edac/edac_core.h
+++ b/drivers/edac/edac_core.h
@@ -74,6 +74,7 @@
 
 #ifdef CONFIG_EDAC_DEBUG
 extern int edac_debug_level;
+extern const char *edac_mem_types[];
 
 #ifndef CONFIG_EDAC_DEBUG_VERBOSE
 #define edac_debug_printk(level, fmt, arg...)                           \
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index b629c41756f0..3630308e7b81 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -76,6 +76,30 @@ static void edac_mc_dump_mci(struct mem_ctl_info *mci)
         debugf3("\tpvt_info = %p\n\n", mci->pvt_info);
 }
 
+/*
+ * keep those in sync with the enum mem_type
+ */
+const char *edac_mem_types[] = {
+        "Empty csrow",
+        "Reserved csrow type",
+        "Unknown csrow type",
+        "Fast page mode RAM",
+        "Extended data out RAM",
+        "Burst Extended data out RAM",
+        "Single data rate SDRAM",
+        "Registered single data rate SDRAM",
+        "Double data rate SDRAM",
+        "Registered Double data rate SDRAM",
+        "Rambus DRAM",
+        "Unbuffered DDR2 RAM",
+        "Fully buffered DDR2",
+        "Registered DDR2 RAM",
+        "Rambus XDR",
+        "Unbuffered DDR3 RAM",
+        "Registered DDR3 RAM",
+};
+EXPORT_SYMBOL_GPL(edac_mem_types);
+
 #endif                          /* CONFIG_EDAC_DEBUG */
 
 /* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'.