From 881075c79be4706a2b3bcd5a75eb659b0e394fce Mon Sep 17 00:00:00 2001

From: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>

Date: Mon, 23 Apr 2018 16:41:40 +0530

Subject: [PATCH] spd: Print dimm rank information

Print DIMM rank information under configuration. Supported for

DDR3 and DDR4.

Sample output:

      *-bank:1

         description: RDIMM DDR4 2666 MHz (0.4ns)

         product: M393A2G40EB2-CTD

	 ......

         configuration: errordetection=ecc rank=1

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>

Signed-off-by: Lianbo Jiang <lijiang@redhat.com>

---

 src/core/device-tree.cc | 6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/src/core/device-tree.cc b/src/core/device-tree.cc

index 642b3c54ece1..a510e4bea726 100644

--- a/src/core/device-tree.cc

+++ b/src/core/device-tree.cc

@@ -862,6 +862,7 @@ static void add_memory_bank_spd(string path, hwNode & bank)

   close(fd);

   if (dimminfo[2] >= 9) {

+    int rank_offset;

     double ns;

     char vendor[5];

     const char *type, *mod_type;

@@ -878,6 +879,7 @@ static void add_memory_bank_spd(string path, hwNode & bank)

       partno_offset = 0x149;

       bus_width_offset = 0x0d;

       serial_offset = 0x145;

+      rank_offset = 0xc;

       /*

        * There is no other valid values for the medium- and fine- timebase

@@ -896,6 +898,7 @@ static void add_memory_bank_spd(string path, hwNode & bank)

       partno_offset = 0x80;

       serial_offset = 0x7a;

       bus_width_offset = 0x08;

+      rank_offset = 0x7;

       ns = (dimminfo[0xc] / 2) * (dimminfo[0xa] / (float) dimminfo[0xb]);

       snprintf(vendor, sizeof(vendor), "%x%x", dimminfo[0x76], dimminfo[0x75]);

@@ -913,6 +916,9 @@ static void add_memory_bank_spd(string path, hwNode & bank)

         break;

     }

+    // Add DIMM rank

+    bank.setConfig("rank", ((dimminfo[rank_offset] >> 3) & 0x7) + 1);

+

     bank.setClock(1000000000 / ns);

     bank.setVendor(jedec_resolve(vendor));

-- 

2.17.1