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[4/6] decode-dimms: Decode DDR5 common module information

Message ID 20241114-decode-ddr5-v1-4-0ed2db8ef30f@outlook.com.au
State New
Headers show
Series decode-dimms: Implement DDR5 decoding | expand

Commit Message

Stephen Horvath via B4 Relay Nov. 14, 2024, 6:37 a.m. UTC 
From: Stephen Horvath <s.horvath@outlook.com.au>

Decode that extra manufacturer information that was mentioned earlier,
but only the info that is common between all DDR5 memory modules.
Also the physical size is here too.

Signed-off-by: Stephen Horvath <s.horvath@outlook.com.au>
---
 eeprom/decode-dimms | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
diff mbox series

Patch

diff --git a/eeprom/decode-dimms b/eeprom/decode-dimms
index 4a19e962cd1f837ccdb6660caa8d198f65e3fc4f..f36af056a480d429203abc7e0dfda3751027948b 100755
--- a/eeprom/decode-dimms
+++ b/eeprom/decode-dimms
@@ -2350,6 +2350,42 @@  sub decode_ddr5_sdram($)
 
 	printl("Thermal Sensor",
 	       $bytes->[14] & 0x08 ? "Supported" : "No");
+
+# common module information
+	prints("Common Information");
+
+	my $spd_info_rev = $bytes->[192];
+	printl("SPD Module Info Revision", ($spd_info_rev >> 4) . "." . ($spd_info_rev & 0xf));
+
+	printl_cond($bytes->[196] & 0x80,
+		    "SPD Manufacturer",
+		    manufacturer_ddr3($bytes->[194], $bytes->[195]));
+	printl_cond($bytes->[200] & 0x80,
+		    "PMIC0 Manufacturer",
+		    manufacturer_ddr3($bytes->[198], $bytes->[199]));
+	printl_cond($bytes->[204] & 0x80,
+		    "PMIC1 Manufacturer",
+		    manufacturer_ddr3($bytes->[202], $bytes->[203]));
+	printl_cond($bytes->[208] & 0x80,
+		    "PMIC2 Manufacturer",
+		    manufacturer_ddr3($bytes->[206], $bytes->[207]));
+	printl_cond($bytes->[212] & 0xC0,
+		    "Thermal Sensors Manufacturer",
+		    manufacturer_ddr3($bytes->[210], $bytes->[211]));
+
+	prints("Physical Characteristics");
+
+	my $height = $bytes->[230] & 0x1f;
+	printl("Module Height",
+		$height == 0x00 ? "15 mm or less" :
+		$height == 0x1f ? "more than 45 mm" :
+		sprintf("%u mm", $height + 15));
+	printl("Module Thickness",
+		sprintf("%d mm front, %d mm back",
+			($bytes->[231] & 0x0f) + 1,
+			(($bytes->[231] >> 4) & 15) + 1));
+	printl("Module Reference Card",
+		ddr3_reference_card($bytes->[232], $bytes->[232]));
 }
 
 # Parameter: EEPROM bytes 0-127 (using 4-5)