[Intel-wired-lan] [PATCH v3] Documentation: fm10k: Add kernel documentation

Jeff Kirsher jeffrey.t.kirsher at intel.com
Mon Aug 20 19:04:46 UTC 2018 

Added the fm10k kernel documentation, which apparently was missing.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher at intel.com>
---
 Documentation/networking/fm10k.rst | 183 +++++++++++++++++++++++++++++
 Documentation/networking/index.rst |   1 +
 MAINTAINERS                        |   1 +
 drivers/net/ethernet/intel/Kconfig |   3 +
 4 files changed, 188 insertions(+)
 create mode 100644 Documentation/networking/fm10k.rst

diff --git a/Documentation/networking/fm10k.rst b/Documentation/networking/fm10k.rst
new file mode 100644
index 000000000000..8ac4125f7c0b
--- /dev/null
+++ b/Documentation/networking/fm10k.rst
@@ -0,0 +1,183 @@
+README for Intel(R) Ethernet Multi-host Controller Driver
+=========================================================
+
+February 23, 2017
+Copyright(c) 2015-2017 Intel Corporation.
+
+Contents
+========
+- Identifying Your Adapter
+- Additional Configurations
+- Performance Tuning
+- Known Issues
+- Support
+
+Identifying Your Adapter
+========================
+The driver in this release is compatible with devices based on the Intel(R)
+Ethernet Multi-host Controller.
+
+For information on how to identify your adapter, and for the latest Intel
+network drivers, refer to the Intel Support website:
+http://www.intel.com/support
+
+
+Flow Control
+------------
+The Intel(R) Ethernet Switch Host Interface Driver does not support Flow
+Control. It will not send pause frames. This may result in dropped frames.
+
+
+Intel(R) Ethernet Flow Director
+-------------------------------
+The Intel Ethernet Flow Director performs the following tasks:
+
+- Directs receive packets according to their flows to different queues.
+- Enables tight control on routing a flow in the platform.
+- Matches flows and CPU cores for flow affinity.
+- Supports multiple parameters for flexible flow classification and load
+  balancing (in SFP mode only).
+
+
+To enable or disable the Intel Ethernet Flow Director::
+
+    ethtool -K ethX ntuple <on|off>
+
+When disabling ntuple filters, all the user programmed filters are flushed from
+the driver cache and hardware. All needed filters must be re-added when ntuple
+is re-enabled.
+
+To add a filter that directs packet to queue 2, use -U or -N switch::
+
+    ethtool -N ethX flow-type tcp4 src-ip 192.168.10.1 dst-ip \
+    192.168.10.2 src-port 2000 dst-port 2001 action 2 [loc 1]
+
+To see the list of filters currently present::
+
+    ethtool <-u|-n> ethX
+
+
+Virtual Functions (VFs)
+-----------------------
+Use sysfs to enable VFs.
+Valid Range: 0-64
+
+For example::
+
+    echo $num_vf_enabled > /sys/class/net/$dev/device/sriov_numvfsr //enable VFs
+    echo 0 > /sys/class/net/$dev/device/sriov_numvfs //disable VFs
+
+NOTE: Neither the device nor the driver control how VFs are mapped into config
+space. Bus layout will vary by operating system. On operating systems that
+support it, you can check sysfs to find the mapping.
+
+NOTE: When SR-IOV mode is enabled, hardware VLAN filtering and VLAN tag
+stripping/insertion will remain enabled. Please remove the old VLAN filter
+before the new VLAN filter is added. For example::
+
+    ip link set eth0 vf 0 vlan 100	// set vlan 100 for VF 0
+    ip link set eth0 vf 0 vlan 0	// Delete vlan 100
+    ip link set eth0 vf 0 vlan 200	// set a new vlan 200 for VF 0
+
+
+Additional Features and Configurations
+======================================
+
+Jumbo Frames
+------------
+Jumbo Frames support is enabled by changing the Maximum Transmission Unit (MTU)
+to a value larger than the default value of 1500.
+
+Use the ifconfig command to increase the MTU size. For example, enter the
+following where <x> is the interface number::
+
+    ifconfig eth<x> mtu 9000 up
+
+Alternatively, you can use the ip command as follows::
+
+    ip link set mtu 9000 dev eth<x>
+    ip link set up dev eth<x>
+
+This setting is not saved across reboots. The setting change can be made
+permanent by adding 'MTU=9000' to the file:
+
+- For RHEL: /etc/sysconfig/network-scripts/ifcfg-eth<x>
+- For SLES: /etc/sysconfig/network/<config_file>
+
+NOTE: The maximum MTU setting for Jumbo Frames is 15342. This value coincides
+with the maximum Jumbo Frames size of 15364 bytes.
+
+NOTE: This driver will attempt to use multiple page sized buffers to receive
+each jumbo packet. This should help to avoid buffer starvation issues when
+allocating receive packets.
+
+
+Generic Receive Offload, aka GRO
+--------------------------------
+The driver supports the in-kernel software implementation of GRO. GRO has
+shown that by coalescing Rx traffic into larger chunks of data, CPU
+utilization can be significantly reduced when under large Rx load. GRO is an
+evolution of the previously-used LRO interface. GRO is able to coalesce
+other protocols besides TCP. It's also safe to use with configurations that
+are problematic for LRO, namely bridging and iSCSI.
+
+
+ethtool
+-------
+The driver utilizes the ethtool interface for driver configuration and
+diagnostics, as well as displaying statistical information. The latest ethtool
+version is required for this functionality. Download it at:
+https://www.kernel.org/pub/software/network/ethtool/
+
+Supported ethtool Commands and Options for Filtering
+----------------------------------------------------
+-n --show-nfc
+  Retrieves the receive network flow classification configurations.
+
+rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6
+  Retrieves the hash options for the specified network traffic type.
+
+-N --config-nfc
+  Configures the receive network flow classification.
+
+rx-flow-hash tcp4|udp4|ah4|esp4|sctp4|tcp6|udp6|ah6|esp6|sctp6 m|v|t|s|d|f|n|r
+  Configures the hash options for the specified network traffic type.
+
+- udp4: UDP over IPv4
+- udp6: UDP over IPv6
+- f Hash on bytes 0 and 1 of the Layer 4 header of the rx packet.
+- n Hash on bytes 2 and 3 of the Layer 4 header of the rx packet.
+
+
+FCoE
+----
+The fm10k driver supports Fiber Channel over Ethernet (FCoE) and Data Center
+Bridging (DCB). This code has no default effect on the regular driver
+operation. Configuring DCB and FCoE is outside the scope of this README. Refer
+to http://www.open-fcoe.org/ for FCoE project information and contact
+fm10k-eedc at lists.sourceforge.net for DCB information.
+
+
+Known Issues/Troubleshooting
+============================
+
+Enabling SR-IOV in a 64-bit Microsoft* Windows Server* 2012/R2 guest OS under Linux KVM
+---------------------------------------------------------------------------------------
+KVM Hypervisor/VMM supports direct assignment of a PCIe device to a VM. This
+includes traditional PCIe devices, as well as SR-IOV-capable devices based on
+the Intel Ethernet Controller XL710.
+
+
+Support
+=======
+For general information, go to the Intel support website at:
+
+https://www.intel.com/support/
+
+or the Intel Wired Networking project hosted by Sourceforge at:
+
+https://sourceforge.net/projects/e1000
+
+If an issue is identified with the released source code on a supported kernel
+with a supported adapter, email the specific information related to the issue
+to e1000-devel at lists.sf.net.
\ No newline at end of file
diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index a9346dc77a74..779c1f141d94 100644
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -14,6 +14,7 @@ Contents:
    dpaa2/index
    e100
    e1000
+   fm10k
    ixgb
    kapi
    z8530book
diff --git a/MAINTAINERS b/MAINTAINERS
index c472a14ae06d..be1adcd6477c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7278,6 +7278,7 @@ S:	Supported
 F:	Documentation/networking/e100.rst
 F:	Documentation/networking/e1000.rst
 F:	Documentation/networking/e1000e.txt
+F:	Documentation/networking/fm10k.rst
 F:	Documentation/networking/igb.txt
 F:	Documentation/networking/igbvf.txt
 F:	Documentation/networking/ixgb.rst
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index fcb676398022..913dabbdfa81 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -277,6 +277,9 @@ config FM10K
 
 	  <http://support.intel.com>
 
+	  More specific information on configuring the driver is in
+	  <file:Documentation/networking/fm10k.rst>.
+
 	  To compile this driver as a module, choose M here. The module
 	  will be called fm10k.  MSI-X interrupt support is required
 
-- 
2.17.1

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