linux-kernel - [PATCH 1/8] EDAC/amd64: Fix number of DIMMs and Chip Select bases/masks on Family17h

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Date:   Fri, 31 May 2019 23:45:11 +0000
From:   "Ghannam, Yazen" <Yazen.Ghannam@....com>
To:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
CC:     "Ghannam, Yazen" <Yazen.Ghannam@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bp@...en8.de" <bp@...en8.de>
Subject: [PATCH 1/8] EDAC/amd64: Fix number of DIMMs and Chip Select
 bases/masks on Family17h

From: Yazen Ghannam <yazen.ghannam@....com>

...because AMD Family 17h systems support 2 DIMMs, 4 CS bases, and 2 CS
masks per channel.

Fixes: 07ed82ef93d6 ("EDAC, amd64: Add Fam17h debug output")
Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
---
 drivers/edac/amd64_edac.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 873437be86d9..9fa2f205f05c 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -810,7 +810,7 @@ static void debug_display_dimm_sizes_df(struct amd64_pvt *pvt, u8 ctrl)
 
 	edac_printk(KERN_DEBUG, EDAC_MC, "UMC%d chip selects:\n", ctrl);
 
-	for (dimm = 0; dimm < 4; dimm++) {
+	for (dimm = 0; dimm < 2; dimm++) {
 		size0 = 0;
 		cs0 = dimm * 2;
 
@@ -942,6 +942,9 @@ static void prep_chip_selects(struct amd64_pvt *pvt)
 	} else if (pvt->fam == 0x15 && pvt->model == 0x30) {
 		pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
 		pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
+	} else if (pvt->fam >= 0x17) {
+		pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
+		pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
 	} else {
 		pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
 		pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
-- 
2.17.1