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  1. 25 Jan, 2019 6 commits
    • David S. Miller's avatar
      Merge branch 'ENETC' · 556b2710
      David S. Miller authored 
      Claudiu Manoil says:

====================
Introduce ENETC ethernet drivers

ENETC is a multi-port virtualized Ethernet controller supporting GbE
designs and Time-Sensitive Networking (TSN) functionality.
ENETC is operating as an SR-IOV multi-PF capable Root Complex Integrated
Endpoint (RCIE).  As such, it contains multiple physical (PF) and virtual
(VF) PCIe functions, discoverable by standard PCI Express.

The patch series adds basic enablement for these otherwise standard
buffer descriptor (BD) ring based ethernet devices (PCIe PFs and VFs),
currently included in the 64-bit dual ARMv8 processors LS1028A SoC.
The driver is portable to 32-bit designs, and it's independent of CPU
endianness.

Contributors:
Alex Marginean <alexandru.marginean@nxp.com>
Catalin Horghidan <catalin.horghidan@nxp.com>

TODO list:
* IEEE 1588 PTP support;
* TSN support;
* MDIO support and VF link management;
* power management support;
* flow control support;
* TC offloading with h/w MQPRIO;
* interrupt coalescing, configurable BD ring sizes, and other usual
config options if missing.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      556b2710
    • Claudiu Manoil's avatar
      enetc: Add RFS and RSS support · d382563f
      Claudiu Manoil authored 
      A ternary match table is used for RFS. If multiple entries in the table
match, the entry with the lowest numerical values index is chosen as the
matching entry.  Entries in the table are identified using an index
which takes a value from 0 to PRFSCAPR[NUM_RFS]-1 when accessed by the
PSI (PF).
Portions of the RFS table can be assigned to each SI by the PSI (PF)
driver in PSIaRFSCFGR.  Assignments are cumulative, the entries assigned
to SIn start after those assigned to SIn-1.  The total assignments to
all SIs must be equal to or less than the number available to the port
as found in PRFSCAPR.

For RSS, the Toeplitz hash function used requires two inputs, a 40B
random secret key that is supplied through the PRSSKR0-9 registers as well
as the relevant pieces of the packet header (n-tuple).  The 6 LSB bits of
the hash function result will then be used as a pointer to obtain the tag
referenced in the 64 entry indirection table.  The result will provide a
winning group which will be used to help route the received packet.
Signed-off-by: default avatarAlex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d382563f
    • Claudiu Manoil's avatar
      enetc: Add vf to pf messaging support · beb74ac8
      Claudiu Manoil authored 
      VSIs (VFs) may send a message to the PSI (PF) for general notification
or to gain access to hardware resources which requires host inspection.
These messages may vary in size and are handled as a partition copy
between two memory regions owned by the respective participants.
The PSI will respond with fail or success and a 16-bit message code.
The patch implements the vf to pf messaging mechanism above and, as the
first application making use of this support, it enables the VF to
configure its own primary MAC address.
Signed-off-by: default avatarCatalin Horghidan <catalin.horghidan@nxp.com>
Signed-off-by: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      beb74ac8
    • Claudiu Manoil's avatar
      enetc: Add ethtool statistics · 16eb4c85
      Claudiu Manoil authored 
      This adds most h/w statistics counters: non-privileged SI conters, as
well as privileged Port and MAC counters available only to the PF.
Per ring software stats are also included.
Signed-off-by: default avatarAlex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      16eb4c85
    • Claudiu Manoil's avatar
      enetc: Introduce basic PF and VF ENETC ethernet drivers · d4fd0404
      Claudiu Manoil authored 
      ENETC is a multi-port virtualized Ethernet controller supporting GbE
designs and Time-Sensitive Networking (TSN) functionality.
ENETC is operating as an SR-IOV multi-PF capable Root Complex Integrated
Endpoint (RCIE).  As such, it contains multiple physical (PF) and
virtual (VF) PCIe functions, discoverable by standard PCI Express.

Introduce basic PF and VF ENETC ethernet drivers.  The PF has access to
the ENETC Port registers and resources and makes the required privileged
configurations for the underlying VF devices.  Common functionality is
controlled through so called System Interface (SI) register blocks, PFs
and VFs own a SI each.  Though SI register blocks are almost identical,
there are a few privileged SI level controls that are accessible only to
PFs, and so the distinction is made between PF SIs (PSI) and VF SIs (VSI).
As such, the bulk of the code, including datapath processing, basic h/w
offload support and generic pci related configuration, is shared between
the 2 drivers and is factored out in common source files (i.e. enetc.c).

Major functionalities included (for both drivers):
MSI-X support for Rx and Tx processing, assignment of Rx/Tx BD ring pairs
to MSI-X entries, multi-queue support, Rx S/G (Rx frame fragmentation) and
jumbo frame (up to 9600B) support, Rx paged allocation and reuse, Tx S/G
support (NETIF_F_SG), Rx and Tx checksum offload, PF MAC filtering and
initial control ring support, VLAN extraction/ insertion, PF Rx VLAN
CTAG filtering, VF mac address config support, VF VLAN isolation support,
etc.
Signed-off-by: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d4fd0404
    • Tariq Toukan's avatar
      net/mlx4_core: A write memory barrier is sufficient in EQ ci update · 5e5b9f62
      Tariq Toukan authored 
      Soften the memory barrier call of mb() by a sufficient wmb() in the
consumer index update of the event queues.
Suggested-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5e5b9f62
  3. 23 Jan, 2019 34 commits
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