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EDAC, amd64: Add Fam17h scrubber support 

Fam17h has new register offsets and fields for setting up the DRAM
scrubber so add support for this.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1479423463-8536-17-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Yazen Ghannam 2016-11-17 17:57:42 -05:00 committed by Borislav Petkov
parent a6c14dce85
commit 8051c0af3c
2 changed files with 40 additions and 5 deletions
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43
drivers/edac/amd64_edac.c
View File

@ -164,8 +164,23 @@ 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)
{
/*
* scan the scrub rate mapping table for a close or matching bandwidth value to
* 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.
*/
static int __set_scrub_rate(struct amd64_pvt *pvt, u32 new_bw, u32 min_rate)
@ -196,7 +211,9 @@ static int __set_scrub_rate(struct amd64_pvt *pvt, u32 new_bw, u32 min_rate)
scrubval = scrubrates[i].scrubval;
if (pvt->fam == 0x15 && pvt->model == 0x60) {
if (pvt->fam == 0x17) {
__f17h_set_scrubval(pvt, scrubval);
} else 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);
@ -233,18 +250,34 @@ static int set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
static int get_scrub_rate(struct mem_ctl_info *mci)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 scrubval = 0;
int i, retval = -EINVAL;
u32 scrubval = 0;
if (pvt->fam == 0x15) {
switch (pvt->fam) {
case 0x15:
/* Erratum #505 */
if (pvt->model < 0x10)
f15h_select_dct(pvt, 0);
if (pvt->model == 0x60)
amd64_read_pci_cfg(pvt->F2, F15H_M60H_SCRCTRL, &scrubval);
} else
break;
case 0x17:
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;
}
break;
default:
amd64_read_pci_cfg(pvt->F3, SCRCTRL, &scrubval);
break;
}
scrubval = scrubval & 0x001F;

2
drivers/edac/amd64_edac.h
View File

@ -204,6 +204,8 @@
#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