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ixgbe: Add support for 1Gbit DAC links

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This is a relatively well known trick for the X520 (82599), can be
useful for testing and lab settings.  It's not an official standard or
particularly common but ubiquitous Broadcom switch ASICs deal with it.

We'll call it 1000Base-KX because it's SerDes on the passive cable and
I don't think it's worth adding another media type for this.

Reviewed by:	emaste
Sponsored by:	BBOX.io
Differential Revision:	https://reviews.freebsd.org/D47352

(cherry picked from commit 48ddd1b9f88753c6875566fbb67bc622453e4993)
This commit is contained in:
Kevin Bowling 2024-11-13 23:33:28 -07:00
parent c66d2795bd
commit 4de746ee98
3 changed files with 19 additions and 2 deletions
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7
sys/dev/ixgbe/if_ix.c
View file

@ -1315,9 +1315,11 @@ ixgbe_add_media_types(if_ctx_t ctx)
}
if (layer & IXGBE_PHYSICAL_LAYER_SFP_PLUS_CU ||
layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA)
layer & IXGBE_PHYSICAL_LAYER_SFP_ACTIVE_DA) {
ifmedia_add(sc->media, IFM_ETHER | IFM_10G_TWINAX, 0,
NULL);
ifmedia_add(sc->media, IFM_ETHER | IFM_1000_KX, 0, NULL);
}
if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR) {
ifmedia_add(sc->media, IFM_ETHER | IFM_10G_LR, 0, NULL);
@ -2323,6 +2325,9 @@ ixgbe_if_media_status(if_ctx_t ctx, struct ifmediareq * ifmr)
case IXGBE_LINK_SPEED_10GB_FULL:
ifmr->ifm_active |= IFM_10G_TWINAX | IFM_FDX;
break;
case IXGBE_LINK_SPEED_1GB_FULL:
ifmr->ifm_active |= IFM_1000_KX | IFM_FDX;
break;
}
if (layer & IXGBE_PHYSICAL_LAYER_10GBASE_LR)
switch (sc->link_speed) {

11
sys/dev/ixgbe/ixgbe_82599.c
View file

@ -441,6 +441,17 @@ s32 ixgbe_get_link_capabilities_82599(struct ixgbe_hw *hw,
goto out;
}
if (hw->phy.sfp_type == ixgbe_sfp_type_da_cu_core0 ||
hw->phy.sfp_type == ixgbe_sfp_type_da_cu_core1) {
*speed = IXGBE_LINK_SPEED_10GB_FULL;
*autoneg = true;
if (hw->phy.multispeed_fiber)
*speed |= IXGBE_LINK_SPEED_1GB_FULL;
goto out;
}
/*
* Determine link capabilities based on the stored value of AUTOC,
* which represents EEPROM defaults. If AUTOC value has not

3
sys/dev/ixgbe/ixgbe_phy.c
View file

@ -1436,7 +1436,8 @@ s32 ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
if (((comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) &&
(comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)) ||
((comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) &&
(comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)))
(comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)) ||
(cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE))
hw->phy.multispeed_fiber = true;
/* Determine PHY vendor */