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From: Yazen Ghannam <yazen.ghannam@amd.com>
To: linux-edac@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, bp@alien8.de, mchehab@kernel.org,
	tony.luck@intel.com, Smita.KoralahalliChannabasappa@amd.com,
	Yazen Ghannam <yazen.ghannam@amd.com>
Subject: [PATCH v2 18/31] EDAC/amd64: Define function to get number of interleaved channels
Date: Wed, 23 Jun 2021 19:19:49 +0000	[thread overview]
Message-ID: <20210623192002.3671647-19-yazen.ghannam@amd.com> (raw)
In-Reply-To: <20210623192002.3671647-1-yazen.ghannam@amd.com>

Move number of interleaved channel calculation to a separate helper
function. Drop unused cases.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20210507190140.18854-15-Yazen.Ghannam@amd.com

v1->v2:
* Moved from arch/x86 to EDAC.

 drivers/edac/amd64_edac.c | 42 +++++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 02dc34c13d65..80192a05bb93 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1097,6 +1097,7 @@ struct addr_ctx {
 	u8 inst_id;
 	u8 map_num;
 	u8 intlv_addr_bit;
+	u8 intlv_num_chan;
 	u8 cs_id;
 	int (*dehash_addr)(struct addr_ctx *ctx);
 };
@@ -1226,12 +1227,29 @@ static int get_intlv_addr_bit(struct addr_ctx *ctx)
 	return 0;
 }
 
+static void get_intlv_num_chan(struct addr_ctx *ctx)
+{
+	/* Save the log2(# of channels). */
+	switch (ctx->intlv_mode) {
+	case NONE:
+		ctx->intlv_num_chan = 0;
+		break;
+	case NOHASH_2CH:
+	case DF2_HASH_2CH:
+		ctx->intlv_num_chan = 1;
+		break;
+	default:
+		/* Valid interleaving modes where checked earlier. */
+		break;
+	}
+}
+
 static int denormalize_addr(struct addr_ctx *ctx)
 {
 	u32 tmp;
 
 	u8 die_id_shift, die_id_mask, socket_id_shift, socket_id_mask;
-	u8 intlv_num_dies, intlv_num_chan, intlv_num_sockets;
+	u8 intlv_num_dies, intlv_num_sockets;
 	u8 num_intlv_bits, cs_mask = 0;
 
 	/* Return early if no interleaving. */
@@ -1244,23 +1262,9 @@ static int denormalize_addr(struct addr_ctx *ctx)
 	intlv_num_sockets = (ctx->reg_limit_addr >> 8) & 0x1;
 	intlv_num_dies	  = (ctx->reg_limit_addr >> 10) & 0x3;
 
-	/* Re-use intlv_num_chan by setting it equal to log2(#channels) */
-	switch (intlv_num_chan) {
-	case 0:	intlv_num_chan = 0; break;
-	case 1: intlv_num_chan = 1; break;
-	case 3: intlv_num_chan = 2; break;
-	case 5:	intlv_num_chan = 3; break;
-	case 7:	intlv_num_chan = 4; break;
-
-	case 8: intlv_num_chan = 1;
-		break;
-	default:
-		pr_err("%s: Invalid number of interleaved channels %d.\n",
-			__func__, intlv_num_chan);
-		return -EINVAL;
-	}
+	get_intlv_num_chan(ctx);
 
-	num_intlv_bits = intlv_num_chan;
+	num_intlv_bits = ctx->intlv_num_chan;
 
 	if (intlv_num_dies > 2) {
 		pr_err("%s: Invalid number of interleaved nodes/dies %d.\n",
@@ -1298,8 +1302,8 @@ static int denormalize_addr(struct addr_ctx *ctx)
 		die_id_bit   = 0;
 
 		/* If interleaved over more than 1 channel: */
-		if (intlv_num_chan) {
-			die_id_bit = intlv_num_chan;
+		if (ctx->intlv_num_chan) {
+			die_id_bit = ctx->intlv_num_chan;
 			cs_mask	   = (1 << die_id_bit) - 1;
 			ctx->cs_id = cs_fabric_id & cs_mask;
 		}
-- 
2.25.1


  parent reply	other threads:[~2021-06-23 19:21 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-23 19:19 [PATCH v2 00/31] AMD MCA Address Translation Updates Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 01/31] x86/MCE/AMD, EDAC/amd64: Move address translation to AMD64 EDAC Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 02/31] x86/amd_nb, EDAC/amd64: Move DF Indirect Read " Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 03/31] EDAC/amd64: Don't use naked values for DF registers Yazen Ghannam
2021-06-25 15:21   ` Borislav Petkov
2021-07-08 19:35     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 04/31] EDAC/amd64: Allow for DF Indirect Broadcast reads Yazen Ghannam
2021-06-30 16:22   ` Borislav Petkov
2021-07-08 19:44     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 05/31] EDAC/amd64: Add context struct Yazen Ghannam
2021-06-30 17:17   ` Borislav Petkov
2021-07-08 19:53     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 06/31] EDAC/amd64: Define Data Fabric operations Yazen Ghannam
2021-06-30 17:19   ` Borislav Petkov
2021-07-08 19:55     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 07/31] EDAC/amd64: Define functions for DramOffset Yazen Ghannam
2021-06-30 17:27   ` Borislav Petkov
2021-07-08 20:08     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 08/31] EDAC/amd64: Define function to read DRAM address map registers Yazen Ghannam
2021-06-30 17:29   ` Borislav Petkov
2021-06-23 19:19 ` [PATCH v2 09/31] EDAC/amd64: Define function to find interleaving mode Yazen Ghannam
2021-06-30 17:33   ` Borislav Petkov
2021-07-08 20:09     ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 10/31] EDAC/amd64: Define function to denormalize address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 11/31] EDAC/amd64: Define function to add DRAM base and hole Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 12/31] EDAC/amd64: Define function to dehash address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 13/31] EDAC/amd64: Define function to check DRAM limit address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 14/31] EDAC/amd64: Remove goto statements Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 15/31] EDAC/amd64: Simplify function parameters Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 16/31] EDAC/amd64: Define function to get Interleave Address Bit Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 17/31] EDAC/amd64: Skip denormalization if no interleaving Yazen Ghannam
2021-06-23 19:19 ` Yazen Ghannam [this message]
2021-06-23 19:19 ` [PATCH v2 19/31] EDAC/amd64: Define function to get number of interleaved dies Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 20/31] EDAC/amd64: Define function to get number of interleaved sockets Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 21/31] EDAC/amd64: Remove unnecessary assert Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 22/31] EDAC/amd64: Define function to make space for CS ID Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 23/31] EDAC/amd64: Define function to calculate " Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 24/31] EDAC/amd64: Define function to insert CS ID into address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 25/31] EDAC/amd64: Define function to get CS Fabric ID Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 26/31] EDAC/amd64: Define function to find shift and mask values Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 27/31] EDAC/amd64: Update CS ID calculation to match reference code Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 28/31] EDAC/amd64: Match hash function to " Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 29/31] EDAC/amd64: Define helper function to get interleave address select bit Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 30/31] EDAC/amd64: Add support for address translation on DF3 systems Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 31/31] EDAC/amd64: Add glossary of acronyms for address translation Yazen Ghannam

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