EDAC, sb_edac: Virtualize several hard-coded functions

SAD limit, interleave mode and DRAM related functionalities are now
virtualized, so that overriding them is easier.

Signed-off-by: Jim Snow <jim.m.snow@intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: lukasz.anaczkowski@intel.com
Link: http://lkml.kernel.org/r/1449136134-23706-3-git-send-email-hubert.chrzaniuk@intel.com
[ Rebase to 4.4-rc3. ]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>

diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 429309c..2e50a3e 100644 (file)
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -65,15 +65,12 @@ static const u32 ibridge_dram_rule[] = {
        0xd8, 0xe0, 0xe8, 0xf0, 0xf8,
 };
 
-#define SAD_LIMIT(reg)         ((GET_BITFIELD(reg, 6, 25) << 26) | 0x3ffffff)
-#define DRAM_ATTR(reg)         GET_BITFIELD(reg, 2,  3)
-#define INTERLEAVE_MODE(reg)   GET_BITFIELD(reg, 1,  1)
 #define DRAM_RULE_ENABLE(reg)  GET_BITFIELD(reg, 0,  0)
 #define A7MODE(reg)            GET_BITFIELD(reg, 26, 26)
 
-static char *get_dram_attr(u32 reg)
+static char *show_dram_attr(u32 attr)
 {
-       switch(DRAM_ATTR(reg)) {
+       switch (attr) {
                case 0:
                        return "DRAM";
                case 1:
@@ -273,6 +270,10 @@ struct sbridge_info {
        u64             (*get_tolm)(struct sbridge_pvt *pvt);
        u64             (*get_tohm)(struct sbridge_pvt *pvt);
        u64             (*rir_limit)(u32 reg);
+       u64             (*sad_limit)(u32 reg);
+       u32             (*interleave_mode)(u32 reg);
+       char*           (*show_interleave_mode)(u32 reg);
+       u32             (*dram_attr)(u32 reg);
        const u32       *dram_rule;
        const u32       *interleave_list;
        const struct interleave_pkg *interleave_pkg;
@@ -718,6 +719,26 @@ static u64 rir_limit(u32 reg)
        return ((u64)GET_BITFIELD(reg,  1, 10) << 29) | 0x1fffffff;
 }
 
+static u64 sad_limit(u32 reg)
+{
+       return (GET_BITFIELD(reg, 6, 25) << 26) | 0x3ffffff;
+}
+
+static u32 interleave_mode(u32 reg)
+{
+       return GET_BITFIELD(reg, 1, 1);
+}
+
+char *show_interleave_mode(u32 reg)
+{
+       return interleave_mode(reg) ? "8:6" : "[8:6]XOR[18:16]";
+}
+
+static u32 dram_attr(u32 reg)
+{
+       return GET_BITFIELD(reg, 2, 3);
+}
+
 static enum mem_type get_memory_type(struct sbridge_pvt *pvt)
 {
        u32 reg;
@@ -1069,7 +1090,7 @@ static void get_memory_layout(const struct mem_ctl_info *mci)
                /* SAD_LIMIT Address range is 45:26 */
                pci_read_config_dword(pvt->pci_sad0, pvt->info.dram_rule[n_sads],
                                      &reg);
-               limit = SAD_LIMIT(reg);
+               limit = pvt->info.sad_limit(reg);
 
                if (!DRAM_RULE_ENABLE(reg))
                        continue;
@@ -1081,10 +1102,10 @@ static void get_memory_layout(const struct mem_ctl_info *mci)
                gb = div_u64_rem(tmp_mb, 1024, &mb);
                edac_dbg(0, "SAD#%d %s up to %u.%03u GB (0x%016Lx) Interleave: %s reg=0x%08x\n",
                         n_sads,
-                        get_dram_attr(reg),
+                        show_dram_attr(pvt->info.dram_attr(reg)),
                         gb, (mb*1000)/1024,
                         ((u64)tmp_mb) << 20L,
-                        INTERLEAVE_MODE(reg) ? "8:6" : "[8:6]XOR[18:16]",
+                        pvt->info.show_interleave_mode(reg),
                         reg);
                prv = limit;
 
@@ -1248,7 +1269,7 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                if (!DRAM_RULE_ENABLE(reg))
                        continue;
 
-               limit = SAD_LIMIT(reg);
+               limit = pvt->info.sad_limit(reg);
                if (limit <= prv) {
                        sprintf(msg, "Can't discover the memory socket");
                        return -EINVAL;
@@ -1262,8 +1283,8 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                return -EINVAL;
        }
        dram_rule = reg;
-       *area_type = get_dram_attr(dram_rule);
-       interleave_mode = INTERLEAVE_MODE(dram_rule);
+       *area_type = show_dram_attr(pvt->info.dram_attr(dram_rule));
+       interleave_mode = pvt->info.interleave_mode(dram_rule);
 
        pci_read_config_dword(pvt->pci_sad0, pvt->info.interleave_list[n_sads],
                              &reg);
@@ -2401,6 +2422,10 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
                pvt->info.get_memory_type = get_memory_type;
                pvt->info.get_node_id = get_node_id;
                pvt->info.rir_limit = rir_limit;
+               pvt->info.sad_limit = sad_limit;
+               pvt->info.interleave_mode = interleave_mode;
+               pvt->info.show_interleave_mode = show_interleave_mode;
+               pvt->info.dram_attr = dram_attr;
                pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule);
                pvt->info.interleave_list = ibridge_interleave_list;
                pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list);
@@ -2421,6 +2446,10 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
                pvt->info.get_memory_type = get_memory_type;
                pvt->info.get_node_id = get_node_id;
                pvt->info.rir_limit = rir_limit;
+               pvt->info.sad_limit = sad_limit;
+               pvt->info.interleave_mode = interleave_mode;
+               pvt->info.show_interleave_mode = show_interleave_mode;
+               pvt->info.dram_attr = dram_attr;
                pvt->info.max_sad = ARRAY_SIZE(sbridge_dram_rule);
                pvt->info.interleave_list = sbridge_interleave_list;
                pvt->info.max_interleave = ARRAY_SIZE(sbridge_interleave_list);
@@ -2441,6 +2470,10 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
                pvt->info.get_memory_type = haswell_get_memory_type;
                pvt->info.get_node_id = haswell_get_node_id;
                pvt->info.rir_limit = haswell_rir_limit;
+               pvt->info.sad_limit = sad_limit;
+               pvt->info.interleave_mode = interleave_mode;
+               pvt->info.show_interleave_mode = show_interleave_mode;
+               pvt->info.dram_attr = dram_attr;
                pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule);
                pvt->info.interleave_list = ibridge_interleave_list;
                pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list);
@@ -2461,6 +2494,10 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
                pvt->info.get_memory_type = haswell_get_memory_type;
                pvt->info.get_node_id = haswell_get_node_id;
                pvt->info.rir_limit = haswell_rir_limit;
+               pvt->info.sad_limit = sad_limit;
+               pvt->info.interleave_mode = interleave_mode;
+               pvt->info.show_interleave_mode = show_interleave_mode;
+               pvt->info.dram_attr = dram_attr;
                pvt->info.max_sad = ARRAY_SIZE(ibridge_dram_rule);
                pvt->info.interleave_list = ibridge_interleave_list;
                pvt->info.max_interleave = ARRAY_SIZE(ibridge_interleave_list);