linux-kernel - [PATCH v3 05/33] EDAC/amd64: Define Data Fabric operations

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Date:   Thu, 28 Oct 2021 17:57:00 +0000
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     <linux-edac@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <bp@...en8.de>,
        <mchehab@...nel.org>, <tony.luck@...el.com>, <james.morse@....com>,
        <rric@...nel.org>, <Smita.KoralahalliChannabasappa@....com>,
        <NaveenKrishna.Chatradhi@....com>, <Muralidhara.MK@....com>,
        Yazen Ghannam <yazen.ghannam@....com>
Subject: [PATCH v3 05/33] EDAC/amd64: Define Data Fabric operations

Define a stub to hold operations for different Data Fabric versions.
This will be filled in following patches.

Set the operations at init-time as appropriate for each model/family
group.

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
---
Link:
https://lkml.kernel.org/r/20210623192002.3671647-7-yazen.ghannam@amd.com

v2->v3:
* Was patch 6 in v2.
* "df_ops" is set at init time.

v1->v2:
* New in v2.

 drivers/edac/amd64_edac.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 3fb137ea74b3..f83f9813294d 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1056,6 +1056,14 @@ struct addr_ctx {
 	u8 inst_id;
 };
 
+struct data_fabric_ops {
+};
+
+struct data_fabric_ops df2_ops = {
+};
+
+struct data_fabric_ops *df_ops;
+
 static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr)
 {
 	u64 dram_base_addr, dram_limit_addr, dram_hole_base;
@@ -1070,6 +1078,9 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr
 
 	struct addr_ctx ctx;
 
+	if (!df_ops)
+		return -EINVAL;
+
 	memset(&ctx, 0, sizeof(ctx));
 
 	/* We start from the normalized address */
@@ -4190,6 +4201,7 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
 		if (pvt->model >= 0x10 && pvt->model <= 0x2f) {
 			pvt->fam_type = &family_types[F17_M10H_CPUS];
 			pvt->ops = &family_types[F17_M10H_CPUS].ops;
+			df_ops	 = &df2_ops;
 			break;
 		} else if (pvt->model >= 0x30 && pvt->model <= 0x3f) {
 			pvt->fam_type = &family_types[F17_M30H_CPUS];
@@ -4208,6 +4220,7 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
 	case 0x18:
 		pvt->fam_type	= &family_types[F17_CPUS];
 		pvt->ops	= &family_types[F17_CPUS].ops;
+		df_ops		= &df2_ops;
 
 		if (pvt->fam == 0x18)
 			family_types[F17_CPUS].ctl_name = "F18h";
-- 
2.25.1