netdev - [PATCH ethtool-next] ethtool: Add support for OSFP transceiver modules

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Date:   Mon, 7 Feb 2022 11:12:31 +0200
From:   Danielle Ratson <danieller@...dia.com>
To:     <netdev@...r.kernel.org>
CC:     <mkubecek@...e.cz>, <vadimp@...dia.com>, <mlxsw@...dia.com>,
        "Danielle Ratson" <danieller@...dia.com>
Subject: [PATCH ethtool-next] ethtool: Add support for OSFP transceiver modules

OSFP transceiver modules use the same management interface specification
(CMIS) as QSFP-DD and DSFP modules.

Allow ethtool to dump, parse and print their EEPROM contents by adding
their SFF-8024 Identifier Value (0x19).

This is required for future NVIDIA Spectrum-4 based systems that will be
equipped with OSFP transceivers.

While at it, add the DSFP identifier to the IOCTL path, as it was
missing.

Signed-off-by: Danielle Ratson <danieller@...dia.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
---
 netlink/module-eeprom.c | 1 +
 qsfp.c                  | 4 +++-
 sff-common.c            | 3 +++
 sff-common.h            | 1 +
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/netlink/module-eeprom.c b/netlink/module-eeprom.c
index f359aee..49833a2 100644
--- a/netlink/module-eeprom.c
+++ b/netlink/module-eeprom.c
@@ -223,6 +223,7 @@ static int eeprom_parse(struct cmd_context *ctx)
 	case SFF8024_ID_QSFP_PLUS:
 		return sff8636_show_all_nl(ctx);
 	case SFF8024_ID_QSFP_DD:
+	case SFF8024_ID_OSFP:
 	case SFF8024_ID_DSFP:
 		return cmis_show_all_nl(ctx);
 #endif
diff --git a/qsfp.c b/qsfp.c
index 57aac86..1fe5de1 100644
--- a/qsfp.c
+++ b/qsfp.c
@@ -947,7 +947,9 @@ void sff8636_show_all_ioctl(const __u8 *id, __u32 eeprom_len)
 {
 	struct sff8636_memory_map map = {};
 
-	if (id[SFF8636_ID_OFFSET] == SFF8024_ID_QSFP_DD) {
+	if (id[SFF8636_ID_OFFSET] == SFF8024_ID_QSFP_DD ||
+	    id[SFF8636_ID_OFFSET] == SFF8024_ID_OSFP ||
+	    id[SFF8636_ID_OFFSET] == SFF8024_ID_DSFP) {
 		cmis_show_all_ioctl(id);
 		return;
 	}
diff --git a/sff-common.c b/sff-common.c
index 2815951..e951cf1 100644
--- a/sff-common.c
+++ b/sff-common.c
@@ -139,6 +139,9 @@ void sff8024_show_identifier(const __u8 *id, int id_offset)
 	case SFF8024_ID_QSFP_DD:
 		printf(" (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))\n");
 		break;
+	case SFF8024_ID_OSFP:
+		printf(" (OSFP 8X Pluggable Transceiver)\n");
+		break;
 	case SFF8024_ID_DSFP:
 		printf(" (DSFP Dual Small Form Factor Pluggable Transceiver)\n");
 		break;
diff --git a/sff-common.h b/sff-common.h
index 9e32300..dd12dda 100644
--- a/sff-common.h
+++ b/sff-common.h
@@ -62,6 +62,7 @@
 #define  SFF8024_ID_CDFP_S3				0x16
 #define  SFF8024_ID_MICRO_QSFP			0x17
 #define  SFF8024_ID_QSFP_DD				0x18
+#define  SFF8024_ID_OSFP				0x19
 #define  SFF8024_ID_DSFP				0x1B
 #define  SFF8024_ID_LAST				SFF8024_ID_DSFP
 #define  SFF8024_ID_UNALLOCATED_LAST	0x7F
-- 
2.31.1