em(4): Update and expand on hardware support
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@ -31,7 +31,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 8, 2023
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.Dd August 3, 2023
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.Dt EM 4
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.Os
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.Sh NAME
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@ -55,21 +55,36 @@ if_em_load="YES"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for PCI Gigabit Ethernet adapters based on
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driver provides support for PCI/PCI-X Gigabit Ethernet adapters based on
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the Intel 82540, 82541ER, 82541PI, 82542, 82543, 82544, 82545, 82546,
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82546EB, 82546GB, 82547, 82571, 81572, 82573, and 82574 Ethernet
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82546EB, 82546GB, 82547 controller chips.
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.Pp
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The
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.Nm
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driver provides support for PCI Express Gigabit Ethernet adapters
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based on the Intel 82571, 81572, 82573, 82574, and 82583 Ethernet
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controller chips.
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.Pp
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The
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.Nm
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driver also provides support for PCI Express Gigabit Ethernet adapters
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based on the Intel 82575, 82576, 82580, i21x and i35x.
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driver provides support for Gigabit Ethernet adapters connected to I/O
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Controller Hub (ICH), Platform Controller Hub (PCH) and Connectivity
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Integrated (CNVi) including Intel 80003ES2LAN, 82562, 82566, 82567,
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82577, 82578, 82579, i217, i218, and i219.
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.Pp
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The
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.Nm
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driver provides support for PCI Express Gigabit Ethernet adapters
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based on the Intel 82575, 82576, 82580, i210, i211, and i35x. These
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appear as
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.Cm igb
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interfaces to maintain compatibility with existing infrastructure.
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.Pp
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The driver supports Transmit/Receive checksum offload and Jumbo Frames
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on all but 82542-based adapters.
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.Pp
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Furthermore it supports TCP segmentation offload (TSO) on all adapters but
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those based on the 82543, 82544 and 82547 controller chips.
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those based on the 82542, 82543, 82544 and 82547 controller chips.
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The identification LEDs of the adapters supported by the
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.Nm
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driver can be controlled via the
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@ -307,7 +322,8 @@ The
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device driver first appeared in
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.Fx 4.4 .
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.Nm
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was merged with the igb device driver and converted to the iflib framework in
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was merged with the lem and igb device driver and converted to the iflib
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framework in
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.Fx 12.0 .
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.Sh AUTHORS
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.An -nosplit
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