user cases can benefit from this, such as fault tolerance and visual
acceleration.
+This PMD allows two hosts to handshake for device start and stop, memory
+allocation for the peer to access and read/write allocated memory from peer.
+Also, the PMD allows to use doorbell registers to notify the peer and share
+some information by using scratchpad registers.
+
+BIOS setting on Intel Skylake
+-----------------------------
+
+Intel Non-transparent Bridge needs special BIOS setting. Since the PMD only
+supports Intel Skylake platform, introduce BIOS setting here. The referencce
+is https://www.intel.com/content/dam/support/us/en/documents/server-products/Intel_Xeon_Processor_Scalable_Family_BIOS_User_Guide.pdf
+
+- Set the needed PCIe port as NTB to NTB mode on both hosts.
+- Enable NTB bars and set bar size of bar 23 and bar 45 as 12-29 (2K-512M)
+ on both hosts. Note that bar size on both hosts should be the same.
+- Disable split bars for both hosts.
+- Set crosslink control override as DSD/USP on one host, USD/DSP on
+ another host.
+- Disable PCIe PII SSC (Spread Spectrum Clocking) for both hosts. This
+ is a hardware requirement.
+
Build Options
-------------
Toggle compilation of the ``ntb`` driver.
+Device Setup
+------------
+
+The Intel NTB devices need to be bound to a DPDK-supported kernel driver
+to use, i.e. igb_uio, vfio. The ``dpdk-devbind.py`` script can be used to
+show devices status and to bind them to a suitable kernel driver. They will
+appear under the category of "Misc (rawdev) devices".
+
Limitation
----------
- The FIFO hasn't been introduced and will come in 19.11 release.
+- This PMD only supports Intel Skylake platform.
git.droids-corp.org / dpdk.git / blobdiff