275 lines
7.1 KiB
ReStructuredText
275 lines
7.1 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+
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========================================================
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Linux Driver for the Pensando(R) Ethernet adapter family
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========================================================
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Pensando Linux Ethernet driver.
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Copyright(c) 2019 Pensando Systems, Inc
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Contents
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========
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- Identifying the Adapter
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- Enabling the driver
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- Configuring the driver
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- Statistics
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- Support
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Identifying the Adapter
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=======================
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To find if one or more Pensando PCI Ethernet devices are installed on the
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host, check for the PCI devices::
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$ lspci -d 1dd8:
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b5:00.0 Ethernet controller: Device 1dd8:1002
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b6:00.0 Ethernet controller: Device 1dd8:1002
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If such devices are listed as above, then the ionic.ko driver should find
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and configure them for use. There should be log entries in the kernel
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messages such as these::
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$ dmesg | grep ionic
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ionic 0000:b5:00.0: 126.016 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x16 link)
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ionic 0000:b5:00.0 enp181s0: renamed from eth0
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ionic 0000:b5:00.0 enp181s0: Link up - 100 Gbps
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ionic 0000:b6:00.0: 126.016 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x16 link)
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ionic 0000:b6:00.0 enp182s0: renamed from eth0
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ionic 0000:b6:00.0 enp182s0: Link up - 100 Gbps
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Driver and firmware version information can be gathered with either of
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ethtool or devlink tools::
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$ ethtool -i enp181s0
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driver: ionic
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version: 5.7.0
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firmware-version: 1.8.0-28
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...
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$ devlink dev info pci/0000:b5:00.0
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pci/0000:b5:00.0:
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driver ionic
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serial_number FLM18420073
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versions:
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fixed:
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asic.id 0x0
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asic.rev 0x0
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running:
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fw 1.8.0-28
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See Documentation/networking/devlink/ionic.rst for more information
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on the devlink dev info data.
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Enabling the driver
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===================
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The driver is enabled via the standard kernel configuration system,
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using the make command::
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make oldconfig/menuconfig/etc.
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The driver is located in the menu structure at:
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-> Device Drivers
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-> Network device support (NETDEVICES [=y])
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-> Ethernet driver support
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-> Pensando devices
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-> Pensando Ethernet IONIC Support
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Configuring the Driver
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======================
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MTU
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---
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Jumbo frame support is available with a maximim size of 9194 bytes.
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Interrupt coalescing
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--------------------
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Interrupt coalescing can be configured by changing the rx-usecs value with
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the "ethtool -C" command. The rx-usecs range is 0-190. The tx-usecs value
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reflects the rx-usecs value as they are tied together on the same interrupt.
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SR-IOV
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------
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Minimal SR-IOV support is currently offered and can be enabled by setting
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the sysfs 'sriov_numvfs' value, if supported by your particular firmware
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configuration.
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Statistics
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==========
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Basic hardware stats
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--------------------
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The commands ``netstat -i``, ``ip -s link show``, and ``ifconfig`` show
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a limited set of statistics taken directly from firmware. For example::
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$ ip -s link show enp181s0
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7: enp181s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
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link/ether 00:ae:cd:00:07:68 brd ff:ff:ff:ff:ff:ff
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RX: bytes packets errors dropped overrun mcast
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414 5 0 0 0 0
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TX: bytes packets errors dropped carrier collsns
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1384 18 0 0 0 0
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ethtool -S
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----------
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The statistics shown from the ``ethtool -S`` command includes a combination of
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driver counters and firmware counters, including port and queue specific values.
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The driver values are counters computed by the driver, and the firmware values
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are gathered by the firmware from the port hardware and passed through the
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driver with no further interpretation.
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Driver port specific::
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tx_packets: 12
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tx_bytes: 964
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rx_packets: 5
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rx_bytes: 414
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tx_tso: 0
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tx_tso_bytes: 0
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tx_csum_none: 12
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tx_csum: 0
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rx_csum_none: 0
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rx_csum_complete: 3
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rx_csum_error: 0
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Driver queue specific::
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tx_0_pkts: 3
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tx_0_bytes: 294
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tx_0_clean: 3
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tx_0_dma_map_err: 0
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tx_0_linearize: 0
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tx_0_frags: 0
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tx_0_tso: 0
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tx_0_tso_bytes: 0
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tx_0_csum_none: 3
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tx_0_csum: 0
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tx_0_vlan_inserted: 0
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rx_0_pkts: 2
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rx_0_bytes: 120
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rx_0_dma_map_err: 0
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rx_0_alloc_err: 0
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rx_0_csum_none: 0
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rx_0_csum_complete: 0
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rx_0_csum_error: 0
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rx_0_dropped: 0
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rx_0_vlan_stripped: 0
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Firmware port specific::
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hw_tx_dropped: 0
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hw_rx_dropped: 0
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hw_rx_over_errors: 0
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hw_rx_missed_errors: 0
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hw_tx_aborted_errors: 0
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frames_rx_ok: 15
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frames_rx_all: 15
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frames_rx_bad_fcs: 0
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frames_rx_bad_all: 0
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octets_rx_ok: 1290
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octets_rx_all: 1290
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frames_rx_unicast: 10
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frames_rx_multicast: 5
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frames_rx_broadcast: 0
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frames_rx_pause: 0
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frames_rx_bad_length: 0
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frames_rx_undersized: 0
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frames_rx_oversized: 0
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frames_rx_fragments: 0
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frames_rx_jabber: 0
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frames_rx_pripause: 0
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frames_rx_stomped_crc: 0
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frames_rx_too_long: 0
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frames_rx_vlan_good: 3
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frames_rx_dropped: 0
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frames_rx_less_than_64b: 0
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frames_rx_64b: 4
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frames_rx_65b_127b: 11
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frames_rx_128b_255b: 0
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frames_rx_256b_511b: 0
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frames_rx_512b_1023b: 0
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frames_rx_1024b_1518b: 0
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frames_rx_1519b_2047b: 0
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frames_rx_2048b_4095b: 0
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frames_rx_4096b_8191b: 0
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frames_rx_8192b_9215b: 0
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frames_rx_other: 0
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frames_tx_ok: 31
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frames_tx_all: 31
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frames_tx_bad: 0
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octets_tx_ok: 2614
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octets_tx_total: 2614
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frames_tx_unicast: 8
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frames_tx_multicast: 21
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frames_tx_broadcast: 2
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frames_tx_pause: 0
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frames_tx_pripause: 0
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frames_tx_vlan: 0
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frames_tx_less_than_64b: 0
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frames_tx_64b: 4
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frames_tx_65b_127b: 27
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frames_tx_128b_255b: 0
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frames_tx_256b_511b: 0
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frames_tx_512b_1023b: 0
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frames_tx_1024b_1518b: 0
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frames_tx_1519b_2047b: 0
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frames_tx_2048b_4095b: 0
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frames_tx_4096b_8191b: 0
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frames_tx_8192b_9215b: 0
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frames_tx_other: 0
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frames_tx_pri_0: 0
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frames_tx_pri_1: 0
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frames_tx_pri_2: 0
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frames_tx_pri_3: 0
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frames_tx_pri_4: 0
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frames_tx_pri_5: 0
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frames_tx_pri_6: 0
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frames_tx_pri_7: 0
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frames_rx_pri_0: 0
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frames_rx_pri_1: 0
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frames_rx_pri_2: 0
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frames_rx_pri_3: 0
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frames_rx_pri_4: 0
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frames_rx_pri_5: 0
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frames_rx_pri_6: 0
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frames_rx_pri_7: 0
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tx_pripause_0_1us_count: 0
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tx_pripause_1_1us_count: 0
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tx_pripause_2_1us_count: 0
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tx_pripause_3_1us_count: 0
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tx_pripause_4_1us_count: 0
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tx_pripause_5_1us_count: 0
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tx_pripause_6_1us_count: 0
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tx_pripause_7_1us_count: 0
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rx_pripause_0_1us_count: 0
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rx_pripause_1_1us_count: 0
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rx_pripause_2_1us_count: 0
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rx_pripause_3_1us_count: 0
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rx_pripause_4_1us_count: 0
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rx_pripause_5_1us_count: 0
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rx_pripause_6_1us_count: 0
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rx_pripause_7_1us_count: 0
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rx_pause_1us_count: 0
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frames_tx_truncated: 0
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Support
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=======
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For general Linux networking support, please use the netdev mailing
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list, which is monitored by Pensando personnel::
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netdev@vger.kernel.org
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For more specific support needs, please use the Pensando driver support
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email::
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drivers@pensando.io
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