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From: Stephen Douthit <stephend@silicom-usa.com>
To: dev@dpdk.org
Cc: wens@silicom-usa.com, Stephen Douthit <stephend@silicom-usa.com>,
	Haiyue Wang <haiyue.wang@intel.com>
Subject: [PATCH 7/7] net/ixgbe: Treat 1G Cu SFPs as 1G SX on the X550 devices
Date: Fri,  3 Dec 2021 17:47:06 -0500	[thread overview]
Message-ID: <20211203224706.569618-8-stephend@silicom-usa.com> (raw)
In-Reply-To: <20211203224706.569618-1-stephend@silicom-usa.com>

1G Cu SFPs are not officially supported on the X552/X553 family of devices
but treat them as 1G SX modules since they usually work.  Print a warning
though since support isn't validated, similar to what already happens for
other unofficially supported SFPs enabled via the allow_unsupported_sfps
parameter inherited from the mainline Linux driver.

Signed-off-by: Stephen Douthit <stephend@silicom-usa.com>
---
 drivers/net/ixgbe/base/ixgbe_x550.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index 8810d1658e..8d1bc6c80d 100644
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -1538,9 +1538,21 @@ STATIC s32 ixgbe_supported_sfp_modules_X550em(struct ixgbe_hw *hw, bool *linear)
 	case ixgbe_sfp_type_1g_lha_core1:
 		*linear = false;
 		break;
-	case ixgbe_sfp_type_unknown:
+	/* Copper SFPs are not officially supported for x550em devices, but can
+	 * often be made to work at fixed 1G speeds.  Pretend they're 1g_sx
+	 * modules here to allow g.Fast DSL SFPs to work.
+	 */
 	case ixgbe_sfp_type_1g_cu_core0:
+		EWARN(hw, "Pretending that unsupported 1g_cu SFP is 1g_sx\n");
+		*linear = false;
+		hw->phy.sfp_type = ixgbe_sfp_type_1g_sx_core0;
+		break;
 	case ixgbe_sfp_type_1g_cu_core1:
+		EWARN(hw, "Pretending that unsupported 1g_cu SFP is 1g_sx\n");
+		*linear = false;
+		hw->phy.sfp_type = ixgbe_sfp_type_1g_sx_core1;
+		break;
+	case ixgbe_sfp_type_unknown:
 	default:
 		return IXGBE_ERR_SFP_NOT_SUPPORTED;
 	}
-- 
2.31.1


       reply	other threads:[~2021-12-06  9:51 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20211203224706.569618-1-stephend@silicom-usa.com>
2021-12-03 22:47 ` Stephen Douthit [this message]
2021-12-03 22:55 [PATCH 0/7] ixgbe SFP handling fixes Stephen Douthit
2021-12-03 22:55 ` [PATCH 7/7] net/ixgbe: Treat 1G Cu SFPs as 1G SX on the X550 devices Stephen Douthit

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