@@ -182,21 +182,6 @@ static inline int amd64_read_dct_pci_cfg(struct amd64_pvt *pvt, u8 dct,
* other archs, we might not have access to the caches directly.
*/
-static inline void __f17h_set_scrubval(struct amd64_pvt *pvt, u32 scrubval)
-{
- /*
- * Fam17h supports scrub values between 0x5 and 0x14. Also, the values
- * are shifted down by 0x5, so scrubval 0x5 is written to the register
- * as 0x0, scrubval 0x6 as 0x1, etc.
- */
- if (scrubval >= 0x5 && scrubval <= 0x14) {
- scrubval -= 0x5;
- pci_write_bits32(pvt->F6, F17H_SCR_LIMIT_ADDR, scrubval, 0xF);
- pci_write_bits32(pvt->F6, F17H_SCR_BASE_ADDR, 1, 0x1);
- } else {
- pci_write_bits32(pvt->F6, F17H_SCR_BASE_ADDR, 0, 0x1);
- }
-}
/*
* Scan the scrub rate mapping table for a close or matching bandwidth value to
* issue. If requested is too big, then use last maximum value found.
@@ -229,9 +214,7 @@ static int __set_scrub_rate(struct amd64_pvt *pvt, u32 new_bw, u32 min_rate)
scrubval = scrubrates[i].scrubval;
- if (pvt->umc) {
- __f17h_set_scrubval(pvt, scrubval);
- } else if (pvt->fam == 0x15 && pvt->model == 0x60) {
+ if (pvt->fam == 0x15 && pvt->model == 0x60) {
f15h_select_dct(pvt, 0);
pci_write_bits32(pvt->F2, F15H_M60H_SCRCTRL, scrubval, 0x001F);
f15h_select_dct(pvt, 1);
@@ -251,6 +234,9 @@ static int set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
struct amd64_pvt *pvt = mci->pvt_info;
u32 min_scrubrate = 0x5;
+ if (pvt->umc)
+ return -EPERM;
+
if (pvt->fam == 0xf)
min_scrubrate = 0x0;
@@ -272,14 +258,7 @@ static int get_scrub_rate(struct mem_ctl_info *mci)
u32 scrubval = 0;
if (pvt->umc) {
- amd64_read_pci_cfg(pvt->F6, F17H_SCR_BASE_ADDR, &scrubval);
- if (scrubval & BIT(0)) {
- amd64_read_pci_cfg(pvt->F6, F17H_SCR_LIMIT_ADDR, &scrubval);
- scrubval &= 0xF;
- scrubval += 0x5;
- } else {
- scrubval = 0;
- }
+ return -EPERM;
} else if (pvt->fam == 0x15) {
/* Erratum #505 */
if (pvt->model < 0x10)
@@ -215,8 +215,6 @@
#define DCT_SEL_HI 0x114
#define F15H_M60H_SCRCTRL 0x1C8
-#define F17H_SCR_BASE_ADDR 0x48
-#define F17H_SCR_LIMIT_ADDR 0x4C
/*
* Function 3 - Misc Control
The scrub registers on AMD Family 17h and later may be inaccessible to the OS. Furthermore, hardware designers recommend that the scrubbing feature is managed by the firmware. Remove support for the sdram_scrub_rate interface for AMD Family 17h systems and later. Also, return an -EPERM code for these systems. This matches the description in Documentation/ABI for this file. Also, this matches the behavior that the OS is not permitted to modify the scrub registers. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> --- drivers/edac/amd64_edac.c | 31 +++++-------------------------- drivers/edac/amd64_edac.h | 2 -- 2 files changed, 5 insertions(+), 28 deletions(-)