[Skiboot] [PATCH 5/5] hdata: Parse SPD data
Vasant Hegde
hegdevasant at linux.vnet.ibm.com
Tue Aug 22 16:49:27 AEST 2017
Parse SPD data and populate device tree.
list of properites parsing from SPD:
-----------------------------------
[root at ltc-wspoon dimm at d00f]# lsprop .
memory-id 0000000c (12) <-- DIMM type
device_type "memory-dimm-ddr4"
serial 15d9ad22 (366587170)
part-number "36ASF2G72PZ-2G6B2 "
manufacturer-id 0000802c (32812) <-- Vendor ID, we can get vendor name from this ID
Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
hdata/memory.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 42 insertions(+), 1 deletion(-)
diff --git a/hdata/memory.c b/hdata/memory.c
index d1570eb..956e0d7 100644
--- a/hdata/memory.c
+++ b/hdata/memory.c
@@ -319,16 +319,49 @@ static void vpd_add_ram_area(const struct HDIF_common_hdr *msarea)
}
}
+static void vpd_parse_spd(struct dt_node *dimm, const char *spd, u32 size)
+{
+ u16 *vendor;
+ u32 *sn;
+
+ /* SPD is too small */
+ if (size < 512) {
+ prlog(PR_WARNING, "MSVPD: Invalid SPD size. "
+ "Expected 512 byts, got %d\n", size);
+ return;
+ }
+
+ /* Supports DDR4 format pasing only */
+ if (spd[0x2] < 0xc) {
+ prlog(PR_WARNING,
+ "MSVPD: SPD format (%x) not supported\n", spd[0x2]);
+ return;
+ }
+
+ dt_add_property_string(dimm, "device_type", "memory-dimm-ddr4");
+
+ dt_add_property_cells(dimm, "memory-id", be16_to_cpu(spd[0x2]));
+
+ sn = (u32 *)&spd[0x145];
+ dt_add_property_cells(dimm, "serial", be32_to_cpu(*sn));
+
+ dt_add_property_nstr(dimm, "part-number", &spd[0x149], 20);
+
+ vendor = (u16 *)&spd[0x140];
+ dt_add_property_cells(dimm, "manufacturer-id", be16_to_cpu(*vendor));
+}
+
static void add_mca_dimm_info(struct dt_node *mca,
const struct HDIF_common_hdr *msarea)
{
- unsigned int i;
+ unsigned int i, size;
const struct HDIF_child_ptr *ramptr;
const struct HDIF_common_hdr *ramarea;
const struct spira_fru_id *fru_id;
const struct HDIF_ram_area_id *ram_id;
const struct HDIF_ram_area_size *ram_area_sz;
struct dt_node *dimm;
+ const void *vpd_blob;
ramptr = HDIF_child_arr(msarea, 0);
if (!CHECK_SPPTR(ramptr)) {
@@ -371,6 +404,14 @@ static void add_mca_dimm_info(struct dt_node *mca,
dt_add_property_string(dimm, "status", "okay");
else
dt_add_property_string(dimm, "status", "disabled");
+
+ vpd_blob = HDIF_get_idata(ramarea, 1, &size);
+ if (!CHECK_SPPTR(vpd_blob))
+ continue;
+ if (vpd_valid(vpd_blob, size))
+ vpd_data_parse(dimm, vpd_blob, size);
+ else
+ vpd_parse_spd(dimm, vpd_blob, size);
}
}
--
2.9.3
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