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Date: Thu, 10 Feb 2011 18:15:13 +0100
From: Borislav Petkov <bp@...64.org>
To: <linux-edac@...r.kernel.org>
Cc: <linux-kernel@...r.kernel.org>,
Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 10/30] amd64_edac: Cleanup Dram Configuration registers handling
From: Borislav Petkov <borislav.petkov@....com>
* Restrict DCT ganged mode check since only Fam10h supports it
* Adjust DRAM type detection for BD since it only supports DDR3
* Remove second and thus unneeded DCLR read in k8_early_channel_count() - we do
that in read_mc_regs()
* Cleanup comments and remove family names from register macros
* Remove unused defines
There should be no functional change resulting from this patch.
Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
drivers/edac/amd64_edac.c | 42 +++++++++++++++++-------------------------
drivers/edac/amd64_edac.h | 19 +++++++------------
2 files changed, 24 insertions(+), 37 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 9fd3c2d..079f5b8 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -799,7 +799,7 @@ static u16 extract_syndrome(struct err_regs *err)
*/
static enum edac_type amd64_determine_edac_cap(struct amd64_pvt *pvt)
{
- int bit;
+ u8 bit;
enum dev_type edac_cap = EDAC_FLAG_NONE;
bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= K8_REV_F)
@@ -826,8 +826,9 @@ static void amd64_dump_dramcfg_low(u32 dclr, int chan)
debugf1(" PAR/ERR parity: %s\n",
(dclr & BIT(8)) ? "enabled" : "disabled");
- debugf1(" DCT 128bit mode width: %s\n",
- (dclr & BIT(11)) ? "128b" : "64b");
+ if (boot_cpu_data.x86 == 0x10)
+ debugf1(" DCT 128bit mode width: %s\n",
+ (dclr & BIT(11)) ? "128b" : "64b");
debugf1(" x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
(dclr & BIT(12)) ? "yes" : "no",
@@ -939,7 +940,10 @@ static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
{
enum mem_type type;
- if (boot_cpu_data.x86 >= 0x10 || pvt->ext_model >= K8_REV_F) {
+ /* F15h supports only DDR3 */
+ if (boot_cpu_data.x86 >= 0x15)
+ type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
+ else if (boot_cpu_data.x86 == 0x10 || pvt->ext_model >= K8_REV_F) {
if (pvt->dchr0 & DDR3_MODE)
type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
else
@@ -953,22 +957,10 @@ static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
return type;
}
-/*
- * Read the DRAM Configuration Low register. It differs between CG, D & E revs
- * and the later RevF memory controllers (DDR vs DDR2)
- *
- * Return:
- * number of memory channels in operation
- * Pass back:
- * contents of the DCL0_LOW register
- */
+/* Get the number of DCT channels the memory controller is using. */
static int k8_early_channel_count(struct amd64_pvt *pvt)
{
- int flag, err = 0;
-
- err = amd64_read_dct_pci_cfg(pvt, F10_DCLR_0, &pvt->dclr0);
- if (err)
- return err;
+ int flag;
if (pvt->ext_model >= K8_REV_F)
/* RevF (NPT) and later */
@@ -983,7 +975,7 @@ static int k8_early_channel_count(struct amd64_pvt *pvt)
return (flag) ? 2 : 1;
}
-/* extract the ERROR ADDRESS for the K8 CPUs */
+/* Extract the ERROR ADDRESS for the K8 CPUs */
static u64 k8_get_error_address(struct mem_ctl_info *mci,
struct err_regs *info)
{
@@ -1486,7 +1478,7 @@ static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
/*
* debug routine to display the memory sizes of all logical DIMMs and its
- * CSROWs as well
+ * CSROWs
*/
static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt)
{
@@ -1960,12 +1952,12 @@ static void read_mc_regs(struct amd64_pvt *pvt)
amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
- amd64_read_dct_pci_cfg(pvt, F10_DCLR_0, &pvt->dclr0);
- amd64_read_dct_pci_cfg(pvt, F10_DCHR_0, &pvt->dchr0);
+ amd64_read_dct_pci_cfg(pvt, DCLR0, &pvt->dclr0);
+ amd64_read_dct_pci_cfg(pvt, DCHR0, &pvt->dchr0);
- if (!dct_ganging_enabled(pvt)) {
- amd64_read_dct_pci_cfg(pvt, F10_DCLR_1, &pvt->dclr1);
- amd64_read_dct_pci_cfg(pvt, F10_DCHR_1, &pvt->dchr1);
+ if (!dct_ganging_enabled(pvt) && boot_cpu_data.x86 > 0xf) {
+ amd64_read_dct_pci_cfg(pvt, DCLR1, &pvt->dclr1);
+ amd64_read_dct_pci_cfg(pvt, DCHR1, &pvt->dchr1);
}
if (boot_cpu_data.x86 >= 0x10) {
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index ba18183..7323f1b 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -218,27 +218,23 @@
#define DBAM_MAX_VALUE 11
-
-#define F10_DCLR_0 0x90
-#define F10_DCLR_1 0x190
+#define DCLR0 0x90
+#define DCLR1 0x190
#define REVE_WIDTH_128 BIT(16)
#define F10_WIDTH_128 BIT(11)
-
-#define F10_DCHR_0 0x94
-#define F10_DCHR_1 0x194
-
-#define F10_DCHR_FOUR_RANK_DIMM BIT(18)
+#define DCHR0 0x94
+#define DCHR1 0x194
#define DDR3_MODE BIT(8)
-#define F10_DCHR_MblMode BIT(6)
-
#define F10_DCTL_SEL_LOW 0x110
#define dct_sel_baseaddr(pvt) ((pvt->dct_sel_low) & 0xFFFFF800)
#define dct_sel_interleave_addr(pvt) (((pvt->dct_sel_low) >> 6) & 0x3)
#define dct_high_range_enabled(pvt) (pvt->dct_sel_low & BIT(0))
#define dct_interleave_enabled(pvt) (pvt->dct_sel_low & BIT(2))
-#define dct_ganging_enabled(pvt) (pvt->dct_sel_low & BIT(4))
+
+#define dct_ganging_enabled(pvt) ((boot_cpu_data.x86 == 0x10) && ((pvt)->dct_sel_low & BIT(4)))
+
#define dct_data_intlv_enabled(pvt) (pvt->dct_sel_low & BIT(5))
#define dct_dram_enabled(pvt) (pvt->dct_sel_low & BIT(8))
#define dct_memory_cleared(pvt) (pvt->dct_sel_low & BIT(10))
@@ -262,7 +258,6 @@
#define K8_NBSL 0x48
-
/* Family F10h: Normalized Extended Error Codes */
#define F10_NBSL_EXT_ERR_RES 0x0
#define F10_NBSL_EXT_ERR_ECC 0x8
--
1.7.4.rc2
--
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