linux-kernel - [PATCH v3 15/33] EDAC/amd64: Define function to get Interleave Address Bit

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Date:   Thu, 28 Oct 2021 17:57:10 +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 15/33] EDAC/amd64: Define function to get Interleave Address Bit

Move code to find the interleave address bit into a separate helper
function.

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
---
Link:
https://lkml.kernel.org/r/20210623192002.3671647-17-yazen.ghannam@amd.com

v2->v3:
* Was patch 16 in v2.

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

 drivers/edac/amd64_edac.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index f4074bc270ec..6b19fc5cf340 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1172,25 +1172,33 @@ static int get_dram_addr_map(struct addr_ctx *ctx)
 	return 0;
 }
 
-static int denormalize_addr(struct addr_ctx *ctx)
+static int get_intlv_addr_bit(struct addr_ctx *ctx)
 {
-	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_addr_sel = (ctx->reg_base_addr >> 8) & 0x7;
-	u8 num_intlv_bits, cs_mask = 0;
 
 	/* {0, 1, 2, 3} map to address bits {8, 9, 10, 11} respectively */
 	if (intlv_addr_sel > 3) {
-		pr_err("%s: Invalid interleave address select %d.\n",
-			__func__, intlv_addr_sel);
+		pr_debug("Invalid interleave address select %d.\n", intlv_addr_sel);
 		return -EINVAL;
 	}
 
+	ctx->intlv_addr_bit = intlv_addr_sel + 8;
+
+	return 0;
+}
+
+static int denormalize_addr(struct addr_ctx *ctx)
+{
+	u8 die_id_shift, die_id_mask, socket_id_shift, socket_id_mask;
+	u8 intlv_num_dies, intlv_num_chan, intlv_num_sockets;
+	u8 num_intlv_bits, cs_mask = 0;
+
+	if (get_intlv_addr_bit(ctx))
+		return -EINVAL;
+
 	intlv_num_sockets = (ctx->reg_limit_addr >> 8) & 0x1;
 	intlv_num_dies	  = (ctx->reg_limit_addr >> 10) & 0x3;
 
-	ctx->intlv_addr_bit = intlv_addr_sel + 8;
-
 	/* Re-use intlv_num_chan by setting it equal to log2(#channels) */
 	switch (intlv_num_chan) {
 	case 0:	intlv_num_chan = 0; break;
-- 
2.25.1