Jakub Grajciar <jgraj...@cisco.com> writes:
> Memory interface (memif), provides high performance
> packet transfer over shared memory.
>
> Signed-off-by: Jakub Grajciar <jgraj...@cisco.com>
> ---
> MAINTAINERS | 6 +
> config/common_base | 5 +
> config/common_linux | 1 +
> doc/guides/nics/features/memif.ini | 14 +
> doc/guides/nics/index.rst | 1 +
> doc/guides/nics/memif.rst | 234 ++++
> doc/guides/rel_notes/release_19_08.rst | 5 +
> drivers/net/Makefile | 1 +
> drivers/net/memif/Makefile | 31 +
> drivers/net/memif/memif.h | 179 +++
> drivers/net/memif/memif_socket.c | 1124 +++++++++++++++++
> drivers/net/memif/memif_socket.h | 105 ++
> drivers/net/memif/meson.build | 15 +
> drivers/net/memif/rte_eth_memif.c | 1206 +++++++++++++++++++
> drivers/net/memif/rte_eth_memif.h | 212 ++++
> drivers/net/memif/rte_pmd_memif_version.map | 4 +
> drivers/net/meson.build | 1 +
> mk/rte.app.mk | 1 +
> 18 files changed, 3145 insertions(+)
> create mode 100644 doc/guides/nics/features/memif.ini
> create mode 100644 doc/guides/nics/memif.rst
> create mode 100644 drivers/net/memif/Makefile
> create mode 100644 drivers/net/memif/memif.h
> create mode 100644 drivers/net/memif/memif_socket.c
> create mode 100644 drivers/net/memif/memif_socket.h
> create mode 100644 drivers/net/memif/meson.build
> create mode 100644 drivers/net/memif/rte_eth_memif.c
> create mode 100644 drivers/net/memif/rte_eth_memif.h
> create mode 100644 drivers/net/memif/rte_pmd_memif_version.map
>
> requires patch: http://patchwork.dpdk.org/patch/51511/
> Memif uses a unix domain socket as control channel (cc).
> rte_interrupts.h is used to handle interrupts for this cc.
> This patch is required, because the message received can
> be a reason for disconnecting.
>
> v3:
> - coding style fixes
> - documentation
> - doxygen comments
> - use strlcpy() instead of strncpy()
> - use RTE_BUILD_BUG_ON instead of _Static_assert()
> - fix meson build deps
>
> v4:
> - coding style fixes
> - doc update (desc format, messaging, features, ...)
> - pointer arithmetic fix
> - __rte_packed and __rte_aligned instead of __attribute__()
> - fixed multi-queue
> - support additional archs (memfd_create syscall)
>
> v5:
> - coding style fixes
> - add release notes
> - remove unused dependencies
> - doc update
>
> v6:
> - remove socket on termination of testpmd application
> - disallow memif probing in secondary process (return error), multi-process
> support will be implemented in separate patch
> - fix chained buffer packet length
> - use single region for rings and buffers (non-zero-copy)
> - doc update
>
> v7:
> - coding style fixes
>
> v8:
> - release notes: 19.05 -> 19.08
>
> v9:
> - rearrange elements in structures to remove holes
> - default socket file in /run
> - #define name sizes
> - implement dev_close op
>
> v10:
> - fix shared lib build
> - clear memory allocated by PMD in .dev_close
> - fix NULL pointer string 'error: ‘%s’ directive argument is null'
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 15d0829c5..3698c146b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -841,6 +841,12 @@ F: drivers/net/softnic/
> F: doc/guides/nics/features/softnic.ini
> F: doc/guides/nics/softnic.rst
>
> +Memif PMD
> +M: Jakub Grajciar <jgraj...@cisco.com>
> +F: drivers/net/memif/
> +F: doc/guides/nics/memif.rst
> +F: doc/guides/nics/features/memif.ini
> +
>
> Crypto Drivers
> --------------
> diff --git a/config/common_base b/config/common_base
> index 6f19ad5d2..e406e7836 100644
> --- a/config/common_base
> +++ b/config/common_base
> @@ -444,6 +444,11 @@ CONFIG_RTE_LIBRTE_PMD_AF_PACKET=n
> #
> CONFIG_RTE_LIBRTE_PMD_AF_XDP=n
>
> +#
> +# Compile Memory Interface PMD driver (Linux only)
> +#
> +CONFIG_RTE_LIBRTE_PMD_MEMIF=n
> +
> #
> # Compile link bonding PMD library
> #
> diff --git a/config/common_linux b/config/common_linux
> index 75334273d..87514fe4f 100644
> --- a/config/common_linux
> +++ b/config/common_linux
> @@ -19,6 +19,7 @@ CONFIG_RTE_LIBRTE_VHOST_POSTCOPY=n
> CONFIG_RTE_LIBRTE_PMD_VHOST=y
> CONFIG_RTE_LIBRTE_IFC_PMD=y
> CONFIG_RTE_LIBRTE_PMD_AF_PACKET=y
> +CONFIG_RTE_LIBRTE_PMD_MEMIF=y
> CONFIG_RTE_LIBRTE_PMD_SOFTNIC=y
> CONFIG_RTE_LIBRTE_PMD_TAP=y
> CONFIG_RTE_LIBRTE_AVP_PMD=y
> diff --git a/doc/guides/nics/features/memif.ini
> b/doc/guides/nics/features/memif.ini
> new file mode 100644
> index 000000000..807d9ecdc
> --- /dev/null
> +++ b/doc/guides/nics/features/memif.ini
> @@ -0,0 +1,14 @@
> +;
> +; Supported features of the 'memif' network poll mode driver.
> +;
> +; Refer to default.ini for the full list of available PMD features.
> +;
> +[Features]
> +Link status = Y
> +Basic stats = Y
> +Jumbo frame = Y
> +ARMv8 = Y
> +Power8 = Y
> +x86-32 = Y
> +x86-64 = Y
> +Usage doc = Y
> diff --git a/doc/guides/nics/index.rst b/doc/guides/nics/index.rst
> index 2221c35f2..691e7209f 100644
> --- a/doc/guides/nics/index.rst
> +++ b/doc/guides/nics/index.rst
> @@ -36,6 +36,7 @@ Network Interface Controller Drivers
> intel_vf
> kni
> liquidio
> + memif
> mlx4
> mlx5
> mvneta
> diff --git a/doc/guides/nics/memif.rst b/doc/guides/nics/memif.rst
> new file mode 100644
> index 000000000..de2d481eb
> --- /dev/null
> +++ b/doc/guides/nics/memif.rst
> @@ -0,0 +1,234 @@
> +.. SPDX-License-Identifier: BSD-3-Clause
> + Copyright(c) 2018-2019 Cisco Systems, Inc.
> +
> +======================
> +Memif Poll Mode Driver
> +======================
> +
> +Shared memory packet interface (memif) PMD allows for DPDK and any other
> client
> +using memif (DPDK, VPP, libmemif) to communicate using shared memory. Memif
> is
> +Linux only.
> +
> +The created device transmits packets in a raw format. It can be used with
> +Ethernet mode, IP mode, or Punt/Inject. At this moment, only Ethernet mode is
> +supported in DPDK memif implementation.
> +
> +Memif works in two roles: master and slave. Slave connects to master over an
> +existing socket. It is also a producer of shared memory file and initializes
> +the shared memory. Each interface can be connected to one peer interface
> +at same time. The peer interface is identified by id parameter. Master
> +creates the socket and listens for any slave connection requests. The socket
> +may already exist on the system. Be sure to remove any such sockets, if you
> +are creating a master interface, or you will see an "Address already in use"
> +error. Function ``rte_pmd_memif_remove()``, which removes memif interface,
> +will also remove a listener socket, if it is not being used by any other
> +interface.
> +
> +The method to enable one or more interfaces is to use the
> +``--vdev=net_memif0`` option on the DPDK application command line. Each
> +``--vdev=net_memif1`` option given will create an interface named net_memif0,
> +net_memif1, and so on. Memif uses unix domain socket to transmit control
> +messages. Each memif has a unique id per socket. This id is used to identify
> +peer interface. If you are connecting multiple
> +interfaces using same socket, be sure to specify unique ids ``id=0``,
> ``id=1``,
> +etc. Note that if you assign a socket to a master interface it becomes a
> +listener socket. Listener socket can not be used by a slave interface on same
> +client.
> +
> +.. csv-table:: **Memif configuration options**
> + :header: "Option", "Description", "Default", "Valid value"
> +
> + "id=0", "Used to identify peer interface", "0", "uint32_t"
> + "role=master", "Set memif role", "slave", "master|slave"
> + "bsize=1024", "Size of single packet buffer", "2048", "uint16_t"
> + "rsize=11", "Log2 of ring size. If rsize is 10, actual ring size is
> 1024", "10", "1-14"
> + "socket=/tmp/memif.sock", "Socket filename", "/tmp/memif.sock", "string
> len 256"
> + "mac=01:23:45:ab:cd:ef", "Mac address", "01:ab:23:cd:45:ef", ""
> + "secret=abc123", "Secret is an optional security option, which if
> specified, must be matched by peer", "", "string len 24"
> + "zero-copy=yes", "Enable/disable zero-copy slave mode", "no", "yes|no"
> +
> +**Connection establishment**
> +
> +In order to create memif connection, two memif interfaces, each in separate
> +process, are needed. One interface in ``master`` role and other in
> +``slave`` role. It is not possible to connect two interfaces in a single
> +process. Each interface can be connected to one interface at same time,
> +identified by matching id parameter.
> +
> +Memif driver uses unix domain socket to exchange required information between
> +memif interfaces. Socket file path is specified at interface creation see
> +*Memif configuration options* table above. If socket is used by ``master``
> +interface, it's marked as listener socket (in scope of current process) and
> +listens to connection requests from other processes. One socket can be used
> by
> +multiple interfaces. One process can have ``slave`` and ``master`` interfaces
> +at the same time, provided each role is assigned unique socket.
> +
> +For detailed information on memif control messages, see: net/memif/memif.h.
> +
> +Slave interface attempts to make a connection on assigned socket. Process
> +listening on this socket will extract the connection request and create a new
> +connected socket (control channel). Then it sends the 'hello' message
> +(``MEMIF_MSG_TYPE_HELLO``), containing configuration boundaries. Slave
> interface
> +adjusts its configuration accordingly, and sends 'init' message
> +(``MEMIF_MSG_TYPE_INIT``). This message among others contains interface id.
> Driver
> +uses this id to find master interface, and assigns the control channel to
> this
> +interface. If such interface is found, 'ack' message
> (``MEMIF_MSG_TYPE_ACK``) is
> +sent. Slave interface sends 'add region' message
> (``MEMIF_MSG_TYPE_ADD_REGION``) for
> +every region allocated. Master responds to each of these messages with 'ack'
> +message. Same behavior applies to rings. Slave sends 'add ring' message
> +(``MEMIF_MSG_TYPE_ADD_RING``) for every initialized ring. Master again
> responds to
> +each message with 'ack' message. To finalize the connection, slave interface
> +sends 'connect' message (``MEMIF_MSG_TYPE_CONNECT``). Upon receiving this
> message
> +master maps regions to its address space, initializes rings and responds with
> +'connected' message (``MEMIF_MSG_TYPE_CONNECTED``). Disconnect
> +(``MEMIF_MSG_TYPE_DISCONNECT``) can be sent by both master and slave
> interfaces at
> +any time, due to driver error or if the interface is being deleted.
> +
> +Files
> +
> +- net/memif/memif.h *- control messages definitions*
> +- net/memif/memif_socket.h
> +- net/memif/memif_socket.c
> +
> +Shared memory
> +~~~~~~~~~~~~~
> +
> +**Shared memory format**
> +
> +Slave is producer and master is consumer. Memory regions, are mapped shared
> memory files,
> +created by memif slave and provided to master at connection establishment.
> +Regions contain rings and buffers. Rings and buffers can also be separated
> into multiple
> +regions. For no-zero-copy, rings and buffers are stored inside single memory
> +region to reduce the number of opened files.
> +
> +region n (no-zero-copy):
> +
> ++-----------------------+-------------------------------------------------------------------------+
> +| Rings | Buffers
> |
> ++-----------+-----------+-----------------+---+---------------------------------------------------+
> +| S2M rings | M2S rings | packet buffer 0 | . | pb ((1 <<
> pmd->run.log2_ring_size)*(s2m + m2s))-1 |
> ++-----------+-----------+-----------------+---+---------------------------------------------------+
> +
> +S2M OR M2S Rings:
> +
> ++--------+--------+-----------------------+
> +| ring 0 | ring 1 | ring num_s2m_rings - 1|
> ++--------+--------+-----------------------+
> +
> +ring 0:
> +
> ++-------------+---------------------------------------+
> +| ring header | (1 << pmd->run.log2_ring_size) * desc |
> ++-------------+---------------------------------------+
> +
> +Descriptors are assigned packet buffers in order of rings creation. If we
> have one ring
> +in each direction and ring size is 1024, then first 1024 buffers will belong
> to S2M ring and
> +last 1024 will belong to M2S ring. In case of zero-copy, buffers are
> dequeued and
> +enqueued as needed.
> +
> +**Descriptor format**
> +
> ++----+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +|Quad|6| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |3|3| | |
> | | | | | | | | | | | |1|1| | | | | | | | | | | | | | | |
> +|
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +|Word|3| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |2|1| | |
> | | | | | | | | | | | |6|5| | | | | | | | | | | | | | |0|
> ++----+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +|0 |length |region
> |flags |
> ++----+---------------------------------------------------------------+-------------------------------+-------------------------------+
> +|1 |metadata |offset
> |
> ++----+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +| |6| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |3|3| | |
> | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
> +|
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +| |3| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |2|1| | |
> | | | | | | | | | | | | | | | | | | | | | | | | | | | |0|
> ++----+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> +
> +**Flags field - flags (Quad Word 0, bits 0:15)**
> +
> ++-----+--------------------+------------------------------------------------------------------------------------------------+
> +|Bits |Name |Functionality
> |
> ++=====+====================+================================================================================================+
> +|0 |MEMIF_DESC_FLAG_NEXT|Is chained buffer. When set, the packet is
> divided into multiple buffers. May not be contiguous.|
> ++-----+--------------------+------------------------------------------------------------------------------------------------+
> +
> +**Region index - region (Quad Word 0, 16:31)**
> +
> +Index of memory region, the buffer is located in.
> +
> +**Data length - length (Quad Word 0, 32:63)**
> +
> +Length of transmitted/received data.
> +
> +**Data Offset - offset (Quad Word 1, 0:31)**
> +
> +Data start offset from memory region address. *.regions[desc->region].addr +
> desc->offset*
> +
> +**Metadata - metadata (Quad Word 1, 32:63)**
> +
> +Buffer metadata.
> +
> +Files
> +
> +- net/memif/memif.h *- descriptor and ring definitions*
> +- net/memif/rte_eth_memif.c *- eth_memif_rx() eth_memif_tx()*
> +
> +Example: testpmd
> +----------------------------
> +In this example we run two instances of testpmd application and transmit
> packets over memif.
> +
> +First create ``master`` interface::
> +
> + #./build/app/testpmd -l 0-1 --proc-type=primary --file-prefix=pmd1
> --vdev=net_memif,role=master -- -i
> +
> +Now create ``slave`` interface (master must be already running so the slave
> will connect)::
> +
> + #./build/app/testpmd -l 2-3 --proc-type=primary --file-prefix=pmd2
> --vdev=net_memif -- -i
> +
> +Start forwarding packets::
> +
> + Slave:
> + testpmd> start
> +
> + Master:
> + testpmd> start tx_first
> +
> +Show status::
> +
> + testpmd> show port stats 0
> +
> +For more details on testpmd please refer to :doc:`../testpmd_app_ug/index`.
> +
> +Example: testpmd and VPP
> +------------------------
> +For information on how to get and run VPP please see
> `<https://wiki.fd.io/view/VPP>`_.
> +
> +Start VPP in interactive mode (should be by default). Create memif master
> interface in VPP::
> +
> + vpp# create interface memif id 0 master no-zero-copy
> + vpp# set interface state memif0/0 up
> + vpp# set interface ip address memif0/0 192.168.1.1/24
> +
> +To see socket filename use show memif command::
> +
> + vpp# show memif
> + sockets
> + id listener filename
> + 0 yes (1) /run/vpp/memif.sock
> + ...
> +
> +Now create memif interface by running testpmd with these command line
> options::
> +
> + #./testpmd --vdev=net_memif,socket=/run/vpp/memif.sock -- -i
> +
> +Testpmd should now create memif slave interface and try to connect to master.
> +In testpmd set forward option to icmpecho and start forwarding::
> +
> + testpmd> set fwd icmpecho
> + testpmd> start
> +
> +Send ping from VPP::
> +
> + vpp# ping 192.168.1.2
> + 64 bytes from 192.168.1.2: icmp_seq=2 ttl=254 time=36.2918 ms
> + 64 bytes from 192.168.1.2: icmp_seq=3 ttl=254 time=23.3927 ms
> + 64 bytes from 192.168.1.2: icmp_seq=4 ttl=254 time=24.2975 ms
> + 64 bytes from 192.168.1.2: icmp_seq=5 ttl=254 time=17.7049 ms
> diff --git a/doc/guides/rel_notes/release_19_08.rst
> b/doc/guides/rel_notes/release_19_08.rst
> index a17e7dea5..46efd13f0 100644
> --- a/doc/guides/rel_notes/release_19_08.rst
> +++ b/doc/guides/rel_notes/release_19_08.rst
> @@ -54,6 +54,11 @@ New Features
> Also, make sure to start the actual text at the margin.
> =========================================================
>
> +* **Added memif PMD.**
> +
> + Added the new Shared Memory Packet Interface (``memif``) PMD.
> + See the :doc:`../nics/memif` guide for more details on this new driver.
> +
>
> Removed Items
> -------------
> diff --git a/drivers/net/Makefile b/drivers/net/Makefile
> index 3a72cf38c..78cb10fc6 100644
> --- a/drivers/net/Makefile
> +++ b/drivers/net/Makefile
> @@ -35,6 +35,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_ICE_PMD) += ice
> DIRS-$(CONFIG_RTE_LIBRTE_IPN3KE_PMD) += ipn3ke
> DIRS-$(CONFIG_RTE_LIBRTE_IXGBE_PMD) += ixgbe
> DIRS-$(CONFIG_RTE_LIBRTE_LIO_PMD) += liquidio
> +DIRS-$(CONFIG_RTE_LIBRTE_PMD_MEMIF) += memif
> DIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += mlx4
> DIRS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5
> DIRS-$(CONFIG_RTE_LIBRTE_MVNETA_PMD) += mvneta
> diff --git a/drivers/net/memif/Makefile b/drivers/net/memif/Makefile
> new file mode 100644
> index 000000000..c3119625c
> --- /dev/null
> +++ b/drivers/net/memif/Makefile
> @@ -0,0 +1,31 @@
> +# SPDX-License-Identifier: BSD-3-Clause
> +# Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> +
> +include $(RTE_SDK)/mk/rte.vars.mk
> +
> +#
> +# library name
> +#
> +LIB = librte_pmd_memif.a
> +
> +EXPORT_MAP := rte_pmd_memif_version.map
> +
> +LIBABIVER := 1
> +
> +CFLAGS += -O3
> +CFLAGS += $(WERROR_FLAGS)
> +CFLAGS += -DALLOW_EXPERIMENTAL_API
> +# Experimantal APIs:
> +# - rte_intr_callback_unregister_pending
> +LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool
> +LDLIBS += -lrte_ethdev -lrte_kvargs
> +LDLIBS += -lrte_hash
> +LDLIBS += -lrte_bus_vdev
> +
> +#
> +# all source are stored in SRCS-y
> +#
> +SRCS-$(CONFIG_RTE_LIBRTE_PMD_MEMIF) += rte_eth_memif.c
> +SRCS-$(CONFIG_RTE_LIBRTE_PMD_MEMIF) += memif_socket.c
> +
> +include $(RTE_SDK)/mk/rte.lib.mk
> diff --git a/drivers/net/memif/memif.h b/drivers/net/memif/memif.h
> new file mode 100644
> index 000000000..3948b1f50
> --- /dev/null
> +++ b/drivers/net/memif/memif.h
> @@ -0,0 +1,179 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> + */
> +
> +#ifndef _MEMIF_H_
> +#define _MEMIF_H_
> +
> +#define MEMIF_COOKIE 0x3E31F20
> +#define MEMIF_VERSION_MAJOR 2
> +#define MEMIF_VERSION_MINOR 0
> +#define MEMIF_VERSION ((MEMIF_VERSION_MAJOR << 8) |
> MEMIF_VERSION_MINOR)
> +#define MEMIF_NAME_SZ 32
> +
> +/*
> + * S2M: direction slave -> master
> + * M2S: direction master -> slave
> + */
> +
> +/*
> + * Type definitions
> + */
> +
> +typedef enum memif_msg_type {
> + MEMIF_MSG_TYPE_NONE,
> + MEMIF_MSG_TYPE_ACK,
> + MEMIF_MSG_TYPE_HELLO,
> + MEMIF_MSG_TYPE_INIT,
> + MEMIF_MSG_TYPE_ADD_REGION,
> + MEMIF_MSG_TYPE_ADD_RING,
> + MEMIF_MSG_TYPE_CONNECT,
> + MEMIF_MSG_TYPE_CONNECTED,
> + MEMIF_MSG_TYPE_DISCONNECT,
> +} memif_msg_type_t;
> +
> +typedef enum {
> + MEMIF_RING_S2M, /**< buffer ring in direction slave -> master */
> + MEMIF_RING_M2S, /**< buffer ring in direction master -> slave */
> +} memif_ring_type_t;
> +
> +typedef enum {
> + MEMIF_INTERFACE_MODE_ETHERNET,
> + MEMIF_INTERFACE_MODE_IP,
> + MEMIF_INTERFACE_MODE_PUNT_INJECT,
> +} memif_interface_mode_t;
> +
> +typedef uint16_t memif_region_index_t;
> +typedef uint32_t memif_region_offset_t;
> +typedef uint64_t memif_region_size_t;
> +typedef uint16_t memif_ring_index_t;
> +typedef uint32_t memif_interface_id_t;
> +typedef uint16_t memif_version_t;
> +typedef uint8_t memif_log2_ring_size_t;
> +
> +/*
> + * Socket messages
> + */
> +
> + /**
> + * M2S
> + * Contains master interfaces configuration.
> + */
> +typedef struct __rte_packed {
> + uint8_t name[MEMIF_NAME_SZ]; /**< Client app name. In this case DPDK
> version */
> + memif_version_t min_version; /**< lowest supported memif version */
> + memif_version_t max_version; /**< highest supported memif version */
> + memif_region_index_t max_region; /**< maximum num of regions */
> + memif_ring_index_t max_m2s_ring; /**< maximum num of M2S ring */
> + memif_ring_index_t max_s2m_ring; /**< maximum num of S2M rings */
> + memif_log2_ring_size_t max_log2_ring_size; /**< maximum ring size (as
> log2) */
> +} memif_msg_hello_t;
> +
> +/**
> + * S2M
> + * Contains information required to identify interface
> + * to which the slave wants to connect.
> + */
> +typedef struct __rte_packed {
> + memif_version_t version; /**< memif version */
> + memif_interface_id_t id; /**< interface id */
> + memif_interface_mode_t mode:8; /**< interface mode */
> + uint8_t secret[24]; /**< optional security
> parameter */
> + uint8_t name[MEMIF_NAME_SZ]; /**< Client app name. In this case DPDK
> version */
> +} memif_msg_init_t;
> +
> +/**
> + * S2M
> + * Request master to add new shared memory region to master interface.
> + * Shared files file descriptor is passed in cmsghdr.
> + */
> +typedef struct __rte_packed {
> + memif_region_index_t index; /**< shm regions index */
> + memif_region_size_t size; /**< shm region size */
> +} memif_msg_add_region_t;
> +
> +/**
> + * S2M
> + * Request master to add new ring to master interface.
> + */
> +typedef struct __rte_packed {
> + uint16_t flags; /**< flags */
> +#define MEMIF_MSG_ADD_RING_FLAG_S2M 1 /**< ring is in S2M
> direction */
> + memif_ring_index_t index; /**< ring index */
> + memif_region_index_t region; /**< region index on which this ring is
> located */
> + memif_region_offset_t offset; /**< buffer start offset */
> + memif_log2_ring_size_t log2_ring_size; /**< ring size (log2) */
> + uint16_t private_hdr_size; /**< used for private metadata
> */
> +} memif_msg_add_ring_t;
> +
> +/**
> + * S2M
> + * Finalize connection establishment.
> + */
> +typedef struct __rte_packed {
> + uint8_t if_name[MEMIF_NAME_SZ]; /**< slave interface name */
> +} memif_msg_connect_t;
> +
> +/**
> + * M2S
> + * Finalize connection establishment.
> + */
> +typedef struct __rte_packed {
> + uint8_t if_name[MEMIF_NAME_SZ]; /**< master interface name */
> +} memif_msg_connected_t;
> +
> +/**
> + * S2M & M2S
> + * Disconnect interfaces.
> + */
> +typedef struct __rte_packed {
> + uint32_t code; /**< error code */
> + uint8_t string[96]; /**< disconnect reason */
> +} memif_msg_disconnect_t;
> +
> +typedef struct __rte_packed __rte_aligned(128)
> +{
> + memif_msg_type_t type:16;
> + union {
> + memif_msg_hello_t hello;
> + memif_msg_init_t init;
> + memif_msg_add_region_t add_region;
> + memif_msg_add_ring_t add_ring;
> + memif_msg_connect_t connect;
> + memif_msg_connected_t connected;
> + memif_msg_disconnect_t disconnect;
> + };
> +} memif_msg_t;
> +
> +/*
> + * Ring and Descriptor Layout
> + */
> +
> +/**
> + * Buffer descriptor.
> + */
> +typedef struct __rte_packed {
> + uint16_t flags; /**< flags */
> +#define MEMIF_DESC_FLAG_NEXT 1 /**< is chained buffer
> */
> + memif_region_index_t region; /**< region index on which the buffer is
> located */
> + uint32_t length; /**< buffer length */
> + memif_region_offset_t offset; /**< buffer offset */
> + uint32_t metadata;
> +} memif_desc_t;
> +
> +#define MEMIF_CACHELINE_ALIGN_MARK(mark) \
> + uint8_t mark[0] __rte_aligned(RTE_CACHE_LINE_SIZE)
> +
> +typedef struct {
> + MEMIF_CACHELINE_ALIGN_MARK(cacheline0);
> + uint32_t cookie; /**< MEMIF_COOKIE */
> + uint16_t flags; /**< flags */
> +#define MEMIF_RING_FLAG_MASK_INT 1 /**< disable interrupt mode */
> + volatile uint16_t head; /**< pointer to ring buffer
> head */
> + MEMIF_CACHELINE_ALIGN_MARK(cacheline1);
> + volatile uint16_t tail; /**< pointer to ring buffer
> tail */
> + MEMIF_CACHELINE_ALIGN_MARK(cacheline2);
> + memif_desc_t desc[0]; /**< buffer descriptors */
> +} memif_ring_t;
> +
> +#endif /* _MEMIF_H_ */
> diff --git a/drivers/net/memif/memif_socket.c
> b/drivers/net/memif/memif_socket.c
> new file mode 100644
> index 000000000..98e8ceefd
> --- /dev/null
> +++ b/drivers/net/memif/memif_socket.c
> @@ -0,0 +1,1124 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> + */
> +
> +#include <stdlib.h>
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/socket.h>
> +#include <sys/un.h>
> +#include <sys/ioctl.h>
> +#include <errno.h>
> +
> +#include <rte_version.h>
> +#include <rte_mbuf.h>
> +#include <rte_ether.h>
> +#include <rte_ethdev_driver.h>
> +#include <rte_ethdev_vdev.h>
> +#include <rte_malloc.h>
> +#include <rte_kvargs.h>
> +#include <rte_bus_vdev.h>
> +#include <rte_hash.h>
> +#include <rte_jhash.h>
> +#include <rte_string_fns.h>
> +
> +#include "rte_eth_memif.h"
> +#include "memif_socket.h"
> +
> +static void memif_intr_handler(void *arg);
> +
> +static ssize_t
> +memif_msg_send(int fd, memif_msg_t *msg, int afd)
> +{
> + struct msghdr mh = { 0 };
> + struct iovec iov[1];
> + struct cmsghdr *cmsg;
> + char ctl[CMSG_SPACE(sizeof(int))];
> +
> + iov[0].iov_base = msg;
> + iov[0].iov_len = sizeof(memif_msg_t);
> + mh.msg_iov = iov;
> + mh.msg_iovlen = 1;
> +
> + if (afd > 0) {
> + memset(&ctl, 0, sizeof(ctl));
> + mh.msg_control = ctl;
> + mh.msg_controllen = sizeof(ctl);
> + cmsg = CMSG_FIRSTHDR(&mh);
> + cmsg->cmsg_len = CMSG_LEN(sizeof(int));
> + cmsg->cmsg_level = SOL_SOCKET;
> + cmsg->cmsg_type = SCM_RIGHTS;
> + rte_memcpy(CMSG_DATA(cmsg), &afd, sizeof(int));
> + }
> +
> + return sendmsg(fd, &mh, 0);
> +}
> +
> +static int
> +memif_msg_send_from_queue(struct memif_control_channel *cc)
> +{
> + ssize_t size;
> + int ret = 0;
> + struct memif_msg_queue_elt *e;
> +
> + e = TAILQ_FIRST(&cc->msg_queue);
> + if (e == NULL)
> + return 0;
> +
> + size = memif_msg_send(cc->intr_handle.fd, &e->msg, e->fd);
> + if (size != sizeof(memif_msg_t)) {
> + MIF_LOG(ERR, "sendmsg fail: %s.", strerror(errno));
> + ret = -1;
> + } else {
> + MIF_LOG(DEBUG, "Sent msg type %u.", e->msg.type);
> + }
> + TAILQ_REMOVE(&cc->msg_queue, e, next);
> + rte_free(e);
> +
> + return ret;
> +}
> +
> +static struct memif_msg_queue_elt *
> +memif_msg_enq(struct memif_control_channel *cc)
> +{
> + struct memif_msg_queue_elt *e;
> +
> + e = rte_zmalloc("memif_msg", sizeof(struct memif_msg_queue_elt), 0);
> + if (e == NULL) {
> + MIF_LOG(ERR, "Failed to allocate control message.");
> + return NULL;
> + }
> +
> + e->fd = -1;
> + TAILQ_INSERT_TAIL(&cc->msg_queue, e, next);
> +
> + return e;
> +}
> +
> +void
> +memif_msg_enq_disconnect(struct memif_control_channel *cc, const char
> *reason,
> + int err_code)
> +{
> + struct memif_msg_queue_elt *e;
> + struct pmd_internals *pmd;
> + memif_msg_disconnect_t *d;
> +
> + if (cc == NULL) {
> + MIF_LOG(DEBUG, "Missing control channel.");
> + return;
> + }
> +
> + e = memif_msg_enq(cc);
> + if (e == NULL) {
> + MIF_LOG(WARNING, "Failed to enqueue disconnect message.");
> + return;
> + }
> +
> + d = &e->msg.disconnect;
> +
> + e->msg.type = MEMIF_MSG_TYPE_DISCONNECT;
> + d->code = err_code;
> +
> + if (reason != NULL) {
> + strlcpy((char *)d->string, reason, sizeof(d->string));
> + if (cc->dev != NULL) {
> + pmd = cc->dev->data->dev_private;
> + strlcpy(pmd->local_disc_string, reason,
> + sizeof(pmd->local_disc_string));
> + }
> + }
> +}
> +
> +static int
> +memif_msg_enq_hello(struct memif_control_channel *cc)
> +{
> + struct memif_msg_queue_elt *e = memif_msg_enq(cc);
> + memif_msg_hello_t *h;
> +
> + if (e == NULL)
> + return -1;
> +
> + h = &e->msg.hello;
> +
> + e->msg.type = MEMIF_MSG_TYPE_HELLO;
> + h->min_version = MEMIF_VERSION;
> + h->max_version = MEMIF_VERSION;
> + h->max_s2m_ring = ETH_MEMIF_MAX_NUM_Q_PAIRS;
> + h->max_m2s_ring = ETH_MEMIF_MAX_NUM_Q_PAIRS;
> + h->max_region = ETH_MEMIF_MAX_REGION_NUM - 1;
> + h->max_log2_ring_size = ETH_MEMIF_MAX_LOG2_RING_SIZE;
> +
> + strlcpy((char *)h->name, rte_version(), sizeof(h->name));
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_hello(struct rte_eth_dev *dev, memif_msg_t *msg)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_hello_t *h = &msg->hello;
> +
> + if (h->min_version > MEMIF_VERSION || h->max_version < MEMIF_VERSION) {
> + memif_msg_enq_disconnect(pmd->cc, "Incompatible memif version",
> 0);
> + return -1;
> + }
> +
> + /* Set parameters for active connection */
> + pmd->run.num_s2m_rings = RTE_MIN(h->max_s2m_ring + 1,
> + pmd->cfg.num_s2m_rings);
> + pmd->run.num_m2s_rings = RTE_MIN(h->max_m2s_ring + 1,
> + pmd->cfg.num_m2s_rings);
> + pmd->run.log2_ring_size = RTE_MIN(h->max_log2_ring_size,
> + pmd->cfg.log2_ring_size);
> + pmd->run.pkt_buffer_size = pmd->cfg.pkt_buffer_size;
> +
> + strlcpy(pmd->remote_name, (char *)h->name, sizeof(pmd->remote_name));
> +
> + MIF_LOG(DEBUG, "%s: Connecting to %s.",
> + rte_vdev_device_name(pmd->vdev), pmd->remote_name);
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_init(struct memif_control_channel *cc, memif_msg_t *msg)
> +{
> + memif_msg_init_t *i = &msg->init;
> + struct memif_socket_dev_list_elt *elt;
> + struct pmd_internals *pmd;
> + struct rte_eth_dev *dev;
> +
> + if (i->version != MEMIF_VERSION) {
> + memif_msg_enq_disconnect(cc, "Incompatible memif version", 0);
> + return -1;
> + }
> +
> + if (cc->socket == NULL) {
> + memif_msg_enq_disconnect(cc, "Device error", 0);
> + return -1;
> + }
> +
> + /* Find device with requested ID */
> + TAILQ_FOREACH(elt, &cc->socket->dev_queue, next) {
> + dev = elt->dev;
> + pmd = dev->data->dev_private;
> + if (((pmd->flags & ETH_MEMIF_FLAG_DISABLED) == 0) &&
> + pmd->id == i->id) {
> + /* assign control channel to device */
> + cc->dev = dev;
> + pmd->cc = cc;
> +
> + if (i->mode != MEMIF_INTERFACE_MODE_ETHERNET) {
> + memif_msg_enq_disconnect(pmd->cc,
> + "Only ethernet mode
> supported",
> + 0);
> + return -1;
> + }
> +
> + if (pmd->flags & (ETH_MEMIF_FLAG_CONNECTING |
> + ETH_MEMIF_FLAG_CONNECTED)) {
> + memif_msg_enq_disconnect(pmd->cc,
> + "Already connected",
> 0);
> + return -1;
> + }
> + strlcpy(pmd->remote_name, (char *)i->name,
> + sizeof(pmd->remote_name));
> +
> + if (*pmd->secret != '\0') {
> + if (*i->secret == '\0') {
> + memif_msg_enq_disconnect(pmd->cc,
> + "Secret
> required", 0);
> + return -1;
> + }
> + if (strncmp(pmd->secret, (char *)i->secret,
> + ETH_MEMIF_SECRET_SIZE) != 0) {
> + memif_msg_enq_disconnect(pmd->cc,
> + "Incorrect
> secret", 0);
> + return -1;
> + }
> + }
> +
> + pmd->flags |= ETH_MEMIF_FLAG_CONNECTING;
> + return 0;
> + }
> + }
> +
> + /* ID not found on this socket */
> + MIF_LOG(DEBUG, "ID %u not found.", i->id);
> + memif_msg_enq_disconnect(cc, "ID not found", 0);
> + return -1;
> +}
> +
> +static int
> +memif_msg_receive_add_region(struct rte_eth_dev *dev, memif_msg_t *msg,
> + int fd)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_add_region_t *ar = &msg->add_region;
> + struct memif_region *r;
> +
> + if (fd < 0) {
> + memif_msg_enq_disconnect(pmd->cc, "Missing region fd", 0);
> + return -1;
> + }
> +
> + if (ar->index >= ETH_MEMIF_MAX_REGION_NUM || ar->index !=
> pmd->regions_num ||
> + pmd->regions[ar->index] != NULL) {
> + memif_msg_enq_disconnect(pmd->cc, "Invalid region index", 0);
> + return -1;
> + }
> +
> + r = rte_zmalloc("region", sizeof(struct memif_region), 0);
> + if (r == NULL) {
> + MIF_LOG(ERR, "%s: Failed to alloc memif region.",
> + rte_vdev_device_name(pmd->vdev));
> + return -ENOMEM;
> + }
> +
> + r->fd = fd;
> + r->region_size = ar->size;
> + r->addr = NULL;
> +
> + pmd->regions[ar->index] = r;
> + pmd->regions_num++;
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_add_ring(struct rte_eth_dev *dev, memif_msg_t *msg, int fd)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_add_ring_t *ar = &msg->add_ring;
> + struct memif_queue *mq;
> +
> + if (fd < 0) {
> + memif_msg_enq_disconnect(pmd->cc, "Missing interrupt fd", 0);
> + return -1;
> + }
> +
> + /* check if we have enough queues */
> + if (ar->flags & MEMIF_MSG_ADD_RING_FLAG_S2M) {
> + if (ar->index >= pmd->cfg.num_s2m_rings) {
> + memif_msg_enq_disconnect(pmd->cc, "Invalid ring index",
> 0);
> + return -1;
> + }
> + pmd->run.num_s2m_rings++;
> + } else {
> + if (ar->index >= pmd->cfg.num_m2s_rings) {
> + memif_msg_enq_disconnect(pmd->cc, "Invalid ring index",
> 0);
> + return -1;
> + }
> + pmd->run.num_m2s_rings++;
> + }
> +
> + mq = (ar->flags & MEMIF_MSG_ADD_RING_FLAG_S2M) ?
> + dev->data->rx_queues[ar->index] : dev->data->tx_queues[ar->index];
> +
> + mq->intr_handle.fd = fd;
> + mq->log2_ring_size = ar->log2_ring_size;
> + mq->region = ar->region;
> + mq->ring_offset = ar->offset;
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_connect(struct rte_eth_dev *dev, memif_msg_t *msg)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_connect_t *c = &msg->connect;
> + int ret;
> +
> + ret = memif_connect(dev);
> + if (ret < 0)
> + return ret;
> +
> + strlcpy(pmd->remote_if_name, (char *)c->if_name,
> + sizeof(pmd->remote_if_name));
> + MIF_LOG(INFO, "%s: Remote interface %s connected.",
> + rte_vdev_device_name(pmd->vdev), pmd->remote_if_name);
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_connected(struct rte_eth_dev *dev, memif_msg_t *msg)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_connected_t *c = &msg->connected;
> + int ret;
> +
> + ret = memif_connect(dev);
> + if (ret < 0)
> + return ret;
> +
> + strlcpy(pmd->remote_if_name, (char *)c->if_name,
> + sizeof(pmd->remote_if_name));
> + MIF_LOG(INFO, "%s: Remote interface %s connected.",
> + rte_vdev_device_name(pmd->vdev), pmd->remote_if_name);
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_receive_disconnect(struct rte_eth_dev *dev, memif_msg_t *msg)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_msg_disconnect_t *d = &msg->disconnect;
> +
> + memset(pmd->remote_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + strlcpy(pmd->remote_disc_string, (char *)d->string,
> + sizeof(pmd->remote_disc_string));
> +
> + MIF_LOG(INFO, "%s: Disconnect received: %s",
> + rte_vdev_device_name(pmd->vdev), pmd->remote_disc_string);
> +
> + memset(pmd->local_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + memif_disconnect(rte_eth_dev_allocated
> + (rte_vdev_device_name(pmd->vdev)));
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_ack(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + if (e == NULL)
> + return -1;
> +
> + e->msg.type = MEMIF_MSG_TYPE_ACK;
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_init(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + memif_msg_init_t *i = &e->msg.init;
> +
> + if (e == NULL)
> + return -1;
> +
> + i = &e->msg.init;
> + e->msg.type = MEMIF_MSG_TYPE_INIT;
> + i->version = MEMIF_VERSION;
> + i->id = pmd->id;
> + i->mode = MEMIF_INTERFACE_MODE_ETHERNET;
> +
> + strlcpy((char *)i->name, rte_version(), sizeof(i->name));
> +
> + if (*pmd->secret != '\0')
> + strlcpy((char *)i->secret, pmd->secret, sizeof(i->secret));
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_add_region(struct rte_eth_dev *dev, uint8_t idx)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + memif_msg_add_region_t *ar;
> + struct memif_region *mr = pmd->regions[idx];
> +
> + if (e == NULL)
> + return -1;
> +
> + ar = &e->msg.add_region;
> + e->msg.type = MEMIF_MSG_TYPE_ADD_REGION;
> + e->fd = mr->fd;
> + ar->index = idx;
> + ar->size = mr->region_size;
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_add_ring(struct rte_eth_dev *dev, uint8_t idx,
> + memif_ring_type_t type)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + struct memif_queue *mq;
> + memif_msg_add_ring_t *ar;
> +
> + if (e == NULL)
> + return -1;
> +
> + ar = &e->msg.add_ring;
> + mq = (type == MEMIF_RING_S2M) ? dev->data->tx_queues[idx] :
> + dev->data->rx_queues[idx];
> +
> + e->msg.type = MEMIF_MSG_TYPE_ADD_RING;
> + e->fd = mq->intr_handle.fd;
> + ar->index = idx;
> + ar->offset = mq->ring_offset;
> + ar->region = mq->region;
> + ar->log2_ring_size = mq->log2_ring_size;
> + ar->flags = (type == MEMIF_RING_S2M) ? MEMIF_MSG_ADD_RING_FLAG_S2M : 0;
> + ar->private_hdr_size = 0;
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_connect(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + const char *name = rte_vdev_device_name(pmd->vdev);
> + memif_msg_connect_t *c;
> +
> + if (e == NULL)
> + return -1;
> +
> + c = &e->msg.connect;
> + e->msg.type = MEMIF_MSG_TYPE_CONNECT;
> + strlcpy((char *)c->if_name, name, sizeof(c->if_name));
> +
> + return 0;
> +}
> +
> +static int
> +memif_msg_enq_connected(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *e = memif_msg_enq(pmd->cc);
> + const char *name = rte_vdev_device_name(pmd->vdev);
> + memif_msg_connected_t *c;
> +
> + if (e == NULL)
> + return -1;
> +
> + c = &e->msg.connected;
> + e->msg.type = MEMIF_MSG_TYPE_CONNECTED;
> + strlcpy((char *)c->if_name, name, sizeof(c->if_name));
> +
> + return 0;
> +}
> +
> +static void
> +memif_intr_unregister_handler(struct rte_intr_handle *intr_handle, void *arg)
> +{
> + struct memif_msg_queue_elt *elt;
> + struct memif_control_channel *cc = arg;
> +
> + /* close control channel fd */
> + close(intr_handle->fd);
> + /* clear message queue */
> + while ((elt = TAILQ_FIRST(&cc->msg_queue)) != NULL) {
> + TAILQ_REMOVE(&cc->msg_queue, elt, next);
> + rte_free(elt);
> + }
> + /* free control channel */
> + rte_free(cc);
> +}
> +
> +void
> +memif_disconnect(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_msg_queue_elt *elt, *next;
> + struct memif_queue *mq;
> + struct rte_intr_handle *ih;
> + int i;
> + int ret;
> +
> + if (pmd->cc != NULL) {
> + /* Clear control message queue (except disconnect message if
> any). */
> + for (elt = TAILQ_FIRST(&pmd->cc->msg_queue); elt != NULL; elt =
> next) {
> + next = TAILQ_NEXT(elt, next);
> + if (elt->msg.type != MEMIF_MSG_TYPE_DISCONNECT) {
> + TAILQ_REMOVE(&pmd->cc->msg_queue, elt, next);
> + rte_free(elt);
> + }
> + }
> + /* send disconnect message (if there is any in queue) */
> + memif_msg_send_from_queue(pmd->cc);
> +
> + /* at this point, there should be no more messages in queue */
> + if (TAILQ_FIRST(&pmd->cc->msg_queue) != NULL) {
> + MIF_LOG(WARNING,
> + "%s: Unexpected message(s) in message queue.",
> + rte_vdev_device_name(pmd->vdev));
> + }
> +
> + ih = &pmd->cc->intr_handle;
> + if (ih->fd > 0) {
> + ret = rte_intr_callback_unregister(ih,
> + memif_intr_handler,
> + pmd->cc);
> + /*
> + * If callback is active (disconnecting based on
> + * received control message).
> + */
> + if (ret == -EAGAIN) {
> + ret = rte_intr_callback_unregister_pending(ih,
> + memif_intr_handler,
> + pmd->cc,
> +
> memif_intr_unregister_handler);
> + } else if (ret > 0) {
> + close(ih->fd);
> + rte_free(pmd->cc);
> + }
> + pmd->cc = NULL;
> + if (ret <= 0)
> + MIF_LOG(WARNING, "%s: Failed to unregister "
> + "control channel callback.",
> + rte_vdev_device_name(pmd->vdev));
> + }
> + }
> +
> + /* unconfig interrupts */
> + for (i = 0; i < pmd->cfg.num_s2m_rings; i++) {
> + if (pmd->role == MEMIF_ROLE_SLAVE) {
> + if (dev->data->tx_queues != NULL)
> + mq = dev->data->tx_queues[i];
> + else
> + continue;
> + } else {
> + if (dev->data->rx_queues != NULL)
> + mq = dev->data->rx_queues[i];
> + else
> + continue;
> + }
> + if (mq->intr_handle.fd > 0) {
> + close(mq->intr_handle.fd);
> + mq->intr_handle.fd = -1;
> + }
> + mq->ring = NULL;
> + }
> + for (i = 0; i < pmd->cfg.num_m2s_rings; i++) {
> + if (pmd->role == MEMIF_ROLE_MASTER) {
> + if (dev->data->tx_queues != NULL)
> + mq = dev->data->tx_queues[i];
> + else
> + continue;
> + } else {
> + if (dev->data->rx_queues != NULL)
> + mq = dev->data->rx_queues[i];
> + else
> + continue;
> + }
> + if (mq->intr_handle.fd > 0) {
> + close(mq->intr_handle.fd);
> + mq->intr_handle.fd = -1;
> + }
> + mq->ring = NULL;
> + }
> +
> + memif_free_regions(pmd);
> +
> + /* reset connection configuration */
> + memset(&pmd->run, 0, sizeof(pmd->run));
> +
> + dev->data->dev_link.link_status = ETH_LINK_DOWN;
> + pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING;
> + pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTED;
> + MIF_LOG(DEBUG, "%s: Disconnected.", rte_vdev_device_name(pmd->vdev));
> +}
> +
> +static int
> +memif_msg_receive(struct memif_control_channel *cc)
> +{
> + char ctl[CMSG_SPACE(sizeof(int)) +
> + CMSG_SPACE(sizeof(struct ucred))] = { 0 };
> + struct msghdr mh = { 0 };
> + struct iovec iov[1];
> + memif_msg_t msg = { 0 };
> + ssize_t size;
> + int ret = 0;
> + struct ucred *cr __rte_unused;
> + cr = 0;
> + struct cmsghdr *cmsg;
> + int afd = -1;
> + int i;
> + struct pmd_internals *pmd;
> +
> + iov[0].iov_base = (void *)&msg;
> + iov[0].iov_len = sizeof(memif_msg_t);
> + mh.msg_iov = iov;
> + mh.msg_iovlen = 1;
> + mh.msg_control = ctl;
> + mh.msg_controllen = sizeof(ctl);
> +
> + size = recvmsg(cc->intr_handle.fd, &mh, 0);
> + if (size != sizeof(memif_msg_t)) {
> + MIF_LOG(DEBUG, "Invalid message size.");
> + memif_msg_enq_disconnect(cc, "Invalid message size", 0);
> + return -1;
> + }
> + MIF_LOG(DEBUG, "Received msg type: %u.", msg.type);
> +
> + cmsg = CMSG_FIRSTHDR(&mh);
> + while (cmsg) {
> + if (cmsg->cmsg_level == SOL_SOCKET) {
> + if (cmsg->cmsg_type == SCM_CREDENTIALS)
> + cr = (struct ucred *)CMSG_DATA(cmsg);
> + else if (cmsg->cmsg_type == SCM_RIGHTS)
> + afd = *(int *)CMSG_DATA(cmsg);
I see that GCC from Xenial:
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.11) 5.4.0 20160609
Complains as follows:
../drivers/net/memif/memif_socket.c: In function ‘memif_msg_receive’:
../drivers/net/memif/memif_socket.c:665:33: error: dereferencing type-punned
pointer will break strict-aliasing rules [-Werror=strict-aliasing]
afd = *(int *)CMSG_DATA(cmsg);
^
Here's the travis build:
https://travis-ci.com/ovsrobot/dpdk/builds/113842433
> + }
> + cmsg = CMSG_NXTHDR(&mh, cmsg);
> + }
> +
> + if (cc->dev == NULL && msg.type != MEMIF_MSG_TYPE_INIT) {
> + MIF_LOG(DEBUG, "Unexpected message.");
> + memif_msg_enq_disconnect(cc, "Unexpected message", 0);
> + return -1;
> + }
> +
> + /* get device from hash data */
> + switch (msg.type) {
> + case MEMIF_MSG_TYPE_ACK:
> + break;
> + case MEMIF_MSG_TYPE_HELLO:
> + ret = memif_msg_receive_hello(cc->dev, &msg);
> + if (ret < 0)
> + goto exit;
> + ret = memif_init_regions_and_queues(cc->dev);
> + if (ret < 0)
> + goto exit;
> + ret = memif_msg_enq_init(cc->dev);
> + if (ret < 0)
> + goto exit;
> + pmd = cc->dev->data->dev_private;
> + for (i = 0; i < pmd->regions_num; i++) {
> + ret = memif_msg_enq_add_region(cc->dev, i);
> + if (ret < 0)
> + goto exit;
> + }
> + for (i = 0; i < pmd->run.num_s2m_rings; i++) {
> + ret = memif_msg_enq_add_ring(cc->dev, i,
> + MEMIF_RING_S2M);
> + if (ret < 0)
> + goto exit;
> + }
> + for (i = 0; i < pmd->run.num_m2s_rings; i++) {
> + ret = memif_msg_enq_add_ring(cc->dev, i,
> + MEMIF_RING_M2S);
> + if (ret < 0)
> + goto exit;
> + }
> + ret = memif_msg_enq_connect(cc->dev);
> + if (ret < 0)
> + goto exit;
> + break;
> + case MEMIF_MSG_TYPE_INIT:
> + /*
> + * This cc does not have an interface asociated with it.
> + * If suitable interface is found it will be assigned here.
> + */
> + ret = memif_msg_receive_init(cc, &msg);
> + if (ret < 0)
> + goto exit;
> + ret = memif_msg_enq_ack(cc->dev);
> + if (ret < 0)
> + goto exit;
> + break;
> + case MEMIF_MSG_TYPE_ADD_REGION:
> + ret = memif_msg_receive_add_region(cc->dev, &msg, afd);
> + if (ret < 0)
> + goto exit;
> + ret = memif_msg_enq_ack(cc->dev);
> + if (ret < 0)
> + goto exit;
> + break;
> + case MEMIF_MSG_TYPE_ADD_RING:
> + ret = memif_msg_receive_add_ring(cc->dev, &msg, afd);
> + if (ret < 0)
> + goto exit;
> + ret = memif_msg_enq_ack(cc->dev);
> + if (ret < 0)
> + goto exit;
> + break;
> + case MEMIF_MSG_TYPE_CONNECT:
> + ret = memif_msg_receive_connect(cc->dev, &msg);
> + if (ret < 0)
> + goto exit;
> + ret = memif_msg_enq_connected(cc->dev);
> + if (ret < 0)
> + goto exit;
> + break;
> + case MEMIF_MSG_TYPE_CONNECTED:
> + ret = memif_msg_receive_connected(cc->dev, &msg);
> + break;
> + case MEMIF_MSG_TYPE_DISCONNECT:
> + ret = memif_msg_receive_disconnect(cc->dev, &msg);
> + if (ret < 0)
> + goto exit;
> + break;
> + default:
> + memif_msg_enq_disconnect(cc, "Unknown message type", 0);
> + ret = -1;
> + goto exit;
> + }
> +
> + exit:
> + return ret;
> +}
> +
> +static void
> +memif_intr_handler(void *arg)
> +{
> + struct memif_control_channel *cc = arg;
> + int ret;
> +
> + ret = memif_msg_receive(cc);
> + /* if driver failed to assign device */
> + if (cc->dev == NULL) {
> + ret = rte_intr_callback_unregister_pending(&cc->intr_handle,
> + memif_intr_handler,
> + cc,
> +
> memif_intr_unregister_handler);
> + if (ret < 0)
> + MIF_LOG(WARNING,
> + "Failed to unregister control channel
> callback.");
> + return;
> + }
> + /* if memif_msg_receive failed */
> + if (ret < 0)
> + goto disconnect;
> +
> + ret = memif_msg_send_from_queue(cc);
> + if (ret < 0)
> + goto disconnect;
> +
> + return;
> +
> + disconnect:
> + if (cc->dev == NULL) {
> + MIF_LOG(WARNING, "eth dev not allocated");
> + return;
> + }
> + memif_disconnect(cc->dev);
> +}
> +
> +static void
> +memif_listener_handler(void *arg)
> +{
> + struct memif_socket *socket = arg;
> + int sockfd;
> + int addr_len;
> + struct sockaddr_un client;
> + struct memif_control_channel *cc;
> + int ret;
> +
> + addr_len = sizeof(client);
> + sockfd = accept(socket->intr_handle.fd, (struct sockaddr *)&client,
> + (socklen_t *)&addr_len);
> + if (sockfd < 0) {
> + MIF_LOG(ERR,
> + "Failed to accept connection request on socket fd %d",
> + socket->intr_handle.fd);
> + return;
> + }
> +
> + MIF_LOG(DEBUG, "%s: Connection request accepted.", socket->filename);
> +
> + cc = rte_zmalloc("memif-cc", sizeof(struct memif_control_channel), 0);
> + if (cc == NULL) {
> + MIF_LOG(ERR, "Failed to allocate control channel.");
> + goto error;
> + }
> +
> + cc->intr_handle.fd = sockfd;
> + cc->intr_handle.type = RTE_INTR_HANDLE_EXT;
> + cc->socket = socket;
> + cc->dev = NULL;
> + TAILQ_INIT(&cc->msg_queue);
> +
> + ret = rte_intr_callback_register(&cc->intr_handle, memif_intr_handler,
> cc);
> + if (ret < 0) {
> + MIF_LOG(ERR, "Failed to register control channel callback.");
> + goto error;
> + }
> +
> + ret = memif_msg_enq_hello(cc);
> + if (ret < 0) {
> + MIF_LOG(ERR, "Failed to enqueue hello message.");
> + goto error;
> + }
> + ret = memif_msg_send_from_queue(cc);
> + if (ret < 0)
> + goto error;
> +
> + return;
> +
> + error:
> + if (sockfd > 0) {
> + close(sockfd);
> + sockfd = -1;
> + }
> + if (cc != NULL)
> + rte_free(cc);
> +}
> +
> +static struct memif_socket *
> +memif_socket_create(struct pmd_internals *pmd, char *key, uint8_t listener)
> +{
> + struct memif_socket *sock;
> + struct sockaddr_un un;
> + int sockfd;
> + int ret;
> + int on = 1;
> +
> + sock = rte_zmalloc("memif-socket", sizeof(struct memif_socket), 0);
> + if (sock == NULL) {
> + MIF_LOG(ERR, "Failed to allocate memory for memif socket");
> + return NULL;
> + }
> +
> + sock->listener = listener;
> + rte_memcpy(sock->filename, key, 256);
> + TAILQ_INIT(&sock->dev_queue);
> +
> + if (listener != 0) {
> + sockfd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
> + if (sockfd < 0)
> + goto error;
> +
> + un.sun_family = AF_UNIX;
> + memcpy(un.sun_path, sock->filename,
> + sizeof(un.sun_path) - 1);
> +
> + ret = setsockopt(sockfd, SOL_SOCKET, SO_PASSCRED, &on,
> + sizeof(on));
> + if (ret < 0)
> + goto error;
> + ret = bind(sockfd, (struct sockaddr *)&un, sizeof(un));
> + if (ret < 0)
> + goto error;
> + ret = listen(sockfd, 1);
> + if (ret < 0)
> + goto error;
> +
> + MIF_LOG(DEBUG, "%s: Memif listener socket %s created.",
> + rte_vdev_device_name(pmd->vdev), sock->filename);
> +
> + sock->intr_handle.fd = sockfd;
> + sock->intr_handle.type = RTE_INTR_HANDLE_EXT;
> + ret = rte_intr_callback_register(&sock->intr_handle,
> + memif_listener_handler, sock);
> + if (ret < 0) {
> + MIF_LOG(ERR, "%s: Failed to register interrupt "
> + "callback for listener socket",
> + rte_vdev_device_name(pmd->vdev));
> + return NULL;
> + }
> + }
> +
> + return sock;
> +
> + error:
> + MIF_LOG(ERR, "%s: Failed to setup socket %s: %s",
> + rte_vdev_device_name(pmd->vdev), key, strerror(errno));
> + if (sock != NULL)
> + rte_free(sock);
> + return NULL;
> +}
> +
> +static struct rte_hash *
> +memif_create_socket_hash(void)
> +{
> + struct rte_hash_parameters params = { 0 };
> + params.name = MEMIF_SOCKET_HASH_NAME;
> + params.entries = 256;
> + params.key_len = 256;
> + params.hash_func = rte_jhash;
> + params.hash_func_init_val = 0;
> + return rte_hash_create(¶ms);
> +}
> +
> +int
> +memif_socket_init(struct rte_eth_dev *dev, const char *socket_filename)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_socket *socket = NULL;
> + struct memif_socket_dev_list_elt *elt;
> + struct pmd_internals *tmp_pmd;
> + struct rte_hash *hash;
> + int ret;
> + char key[256];
> +
> + hash = rte_hash_find_existing(MEMIF_SOCKET_HASH_NAME);
> + if (hash == NULL) {
> + hash = memif_create_socket_hash();
> + if (hash == NULL) {
> + MIF_LOG(ERR, "Failed to create memif socket hash.");
> + return -1;
> + }
> + }
> +
> + memset(key, 0, 256);
> + rte_memcpy(key, socket_filename, strlen(socket_filename));
> + ret = rte_hash_lookup_data(hash, key, (void **)&socket);
> + if (ret < 0) {
> + socket = memif_socket_create(pmd, key,
> + (pmd->role ==
> + MEMIF_ROLE_SLAVE) ? 0 : 1);
> + if (socket == NULL)
> + return -1;
> + ret = rte_hash_add_key_data(hash, key, socket);
> + if (ret < 0) {
> + MIF_LOG(ERR, "Failed to add socket to socket hash.");
> + return ret;
> + }
> + }
> + pmd->socket_filename = socket->filename;
> +
> + if (socket->listener != 0 && pmd->role == MEMIF_ROLE_SLAVE) {
> + MIF_LOG(ERR, "Socket is a listener.");
> + return -1;
> + } else if ((socket->listener == 0) && (pmd->role == MEMIF_ROLE_MASTER))
> {
> + MIF_LOG(ERR, "Socket is not a listener.");
> + return -1;
> + }
> +
> + TAILQ_FOREACH(elt, &socket->dev_queue, next) {
> + tmp_pmd = elt->dev->data->dev_private;
> + if (tmp_pmd->id == pmd->id) {
> + MIF_LOG(ERR, "Memif device with id %d already "
> + "exists on socket %s",
> + pmd->id, socket->filename);
> + return -1;
> + }
> + }
> +
> + elt = rte_malloc("pmd-queue", sizeof(struct memif_socket_dev_list_elt),
> 0);
> + if (elt == NULL) {
> + MIF_LOG(ERR, "%s: Failed to add device to socket device list.",
> + rte_vdev_device_name(pmd->vdev));
> + return -1;
> + }
> + elt->dev = dev;
> + TAILQ_INSERT_TAIL(&socket->dev_queue, elt, next);
> +
> + return 0;
> +}
> +
> +void
> +memif_socket_remove_device(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_socket *socket = NULL;
> + struct memif_socket_dev_list_elt *elt, *next;
> + struct rte_hash *hash;
> +
> + hash = rte_hash_find_existing(MEMIF_SOCKET_HASH_NAME);
> + if (hash == NULL)
> + return;
> +
> + if (pmd->socket_filename == NULL)
> + return;
> +
> + if (rte_hash_lookup_data(hash, pmd->socket_filename, (void **)&socket)
> < 0)
> + return;
> +
> + for (elt = TAILQ_FIRST(&socket->dev_queue); elt != NULL; elt = next) {
> + next = TAILQ_NEXT(elt, next);
> + if (elt->dev == dev) {
> + TAILQ_REMOVE(&socket->dev_queue, elt, next);
> + rte_free(elt);
> + pmd->socket_filename = NULL;
> + }
> + }
> +
> + /* remove socket, if this was the last device using it */
> + if (TAILQ_EMPTY(&socket->dev_queue)) {
> + rte_hash_del_key(hash, socket->filename);
> + if (socket->listener) {
> + /* remove listener socket file,
> + * so we can create new one later.
> + */
> + remove(socket->filename);
> + }
> + rte_free(socket);
> + }
> +}
> +
> +int
> +memif_connect_master(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> +
> + memset(pmd->local_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + memset(pmd->remote_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + pmd->flags &= ~ETH_MEMIF_FLAG_DISABLED;
> + return 0;
> +}
> +
> +int
> +memif_connect_slave(struct rte_eth_dev *dev)
> +{
> + int sockfd;
> + int ret;
> + struct sockaddr_un sun;
> + struct pmd_internals *pmd = dev->data->dev_private;
> +
> + memset(pmd->local_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + memset(pmd->remote_disc_string, 0, ETH_MEMIF_DISC_STRING_SIZE);
> + pmd->flags &= ~ETH_MEMIF_FLAG_DISABLED;
> +
> + sockfd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
> + if (sockfd < 0) {
> + MIF_LOG(ERR, "%s: Failed to open socket.",
> + rte_vdev_device_name(pmd->vdev));
> + return -1;
> + }
> +
> + sun.sun_family = AF_UNIX;
> +
> + memcpy(sun.sun_path, pmd->socket_filename, sizeof(sun.sun_path) - 1);
> +
> + ret = connect(sockfd, (struct sockaddr *)&sun,
> + sizeof(struct sockaddr_un));
> + if (ret < 0) {
> + MIF_LOG(ERR, "%s: Failed to connect socket: %s.",
> + rte_vdev_device_name(pmd->vdev), pmd->socket_filename);
> + goto error;
> + }
> +
> + MIF_LOG(DEBUG, "%s: Memif socket: %s connected.",
> + rte_vdev_device_name(pmd->vdev), pmd->socket_filename);
> +
> + pmd->cc = rte_zmalloc("memif-cc",
> + sizeof(struct memif_control_channel), 0);
> + if (pmd->cc == NULL) {
> + MIF_LOG(ERR, "%s: Failed to allocate control channel.",
> + rte_vdev_device_name(pmd->vdev));
> + goto error;
> + }
> +
> + pmd->cc->intr_handle.fd = sockfd;
> + pmd->cc->intr_handle.type = RTE_INTR_HANDLE_EXT;
> + pmd->cc->socket = NULL;
> + pmd->cc->dev = dev;
> + TAILQ_INIT(&pmd->cc->msg_queue);
> +
> + ret = rte_intr_callback_register(&pmd->cc->intr_handle,
> + memif_intr_handler, pmd->cc);
> + if (ret < 0) {
> + MIF_LOG(ERR, "%s: Failed to register interrupt callback "
> + "for control fd", rte_vdev_device_name(pmd->vdev));
> + goto error;
> + }
> +
> + return 0;
> +
> + error:
> + if (sockfd > 0) {
> + close(sockfd);
> + sockfd = -1;
> + }
> + if (pmd->cc != NULL) {
> + rte_free(pmd->cc);
> + pmd->cc = NULL;
> + }
> + return -1;
> +}
> diff --git a/drivers/net/memif/memif_socket.h
> b/drivers/net/memif/memif_socket.h
> new file mode 100644
> index 000000000..c60614721
> --- /dev/null
> +++ b/drivers/net/memif/memif_socket.h
> @@ -0,0 +1,105 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> + */
> +
> +#ifndef _MEMIF_SOCKET_H_
> +#define _MEMIF_SOCKET_H_
> +
> +#include <sys/queue.h>
> +
> +/**
> + * Remove device from socket device list. If no device is left on the socket,
> + * remove the socket as well.
> + *
> + * @param pmd
> + * device internals
> + */
> +void memif_socket_remove_device(struct rte_eth_dev *dev);
> +
> +/**
> + * Enqueue disconnect message to control channel message queue.
> + *
> + * @param cc
> + * control channel
> + * @param reason
> + * const string stating disconnect reason (96 characters)
> + * @param err_code
> + * error code
> + */
> +void memif_msg_enq_disconnect(struct memif_control_channel *cc, const char
> *reason,
> + int err_code);
> +
> +/**
> + * Initialize memif socket for specified device. If socket doesn't exist,
> create socket.
> + *
> + * @param dev
> + * memif ethernet device
> + * @param socket_filename
> + * socket filename
> + * @return
> + * - On success, zero.
> + * - On failure, a negative value.
> + */
> +int memif_socket_init(struct rte_eth_dev *dev, const char *socket_filename);
> +
> +/**
> + * Disconnect memif device. Close control channel and shared memory.
> + *
> + * @param dev
> + * ethernet device
> + */
> +void memif_disconnect(struct rte_eth_dev *dev);
> +
> +/**
> + * If device is properly configured, enable connection establishment.
> + *
> + * @param dev
> + * memif ethernet device
> + * @return
> + * - On success, zero.
> + * - On failure, a negative value.
> + */
> +int memif_connect_master(struct rte_eth_dev *dev);
> +
> +/**
> + * If device is properly configured, send connection request.
> + *
> + * @param dev
> + * memif ethernet device
> + * @return
> + * - On success, zero.
> + * - On failure, a negative value.
> + */
> +int memif_connect_slave(struct rte_eth_dev *dev);
> +
> +struct memif_socket_dev_list_elt {
> + TAILQ_ENTRY(memif_socket_dev_list_elt) next;
> + struct rte_eth_dev *dev; /**< pointer to device
> internals */
> + char dev_name[RTE_ETH_NAME_MAX_LEN];
> +};
> +
> +#define MEMIF_SOCKET_HASH_NAME "memif-sh"
> +struct memif_socket {
> + struct rte_intr_handle intr_handle; /**< interrupt handle */
> + char filename[256]; /**< socket filename */
> +
> + TAILQ_HEAD(, memif_socket_dev_list_elt) dev_queue;
> + /**< Queue of devices using this socket */
> + uint8_t listener; /**< if not zero socket is
> listener */
> +};
> +
> +/* Control message queue. */
> +struct memif_msg_queue_elt {
> + memif_msg_t msg; /**< control message */
> + TAILQ_ENTRY(memif_msg_queue_elt) next;
> + int fd; /**< fd to be sent to peer */
> +};
> +
> +struct memif_control_channel {
> + struct rte_intr_handle intr_handle; /**< interrupt handle */
> + TAILQ_HEAD(, memif_msg_queue_elt) msg_queue; /**< control message queue
> */
> + struct memif_socket *socket; /**< pointer to socket */
> + struct rte_eth_dev *dev; /**< pointer to device */
> +};
> +
> +#endif /* MEMIF_SOCKET_H */
> diff --git a/drivers/net/memif/meson.build b/drivers/net/memif/meson.build
> new file mode 100644
> index 000000000..287a30ef2
> --- /dev/null
> +++ b/drivers/net/memif/meson.build
> @@ -0,0 +1,15 @@
> +# SPDX-License-Identifier: BSD-3-Clause
> +# Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> +
> +if host_machine.system() != 'linux'
> + build = false
> +endif
> +
> +sources = files('rte_eth_memif.c',
> + 'memif_socket.c')
> +
> +allow_experimental_apis = true
> +# Experimantal APIs:
> +# - rte_intr_callback_unregister_pending
> +
> +deps += ['hash']
> diff --git a/drivers/net/memif/rte_eth_memif.c
> b/drivers/net/memif/rte_eth_memif.c
> new file mode 100644
> index 000000000..3b9c1ce66
> --- /dev/null
> +++ b/drivers/net/memif/rte_eth_memif.c
> @@ -0,0 +1,1206 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> + */
> +
> +#include <stdlib.h>
> +#include <fcntl.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/socket.h>
> +#include <sys/un.h>
> +#include <sys/ioctl.h>
> +#include <sys/mman.h>
> +#include <linux/if_ether.h>
> +#include <errno.h>
> +#include <sys/eventfd.h>
> +
> +#include <rte_version.h>
> +#include <rte_mbuf.h>
> +#include <rte_ether.h>
> +#include <rte_ethdev_driver.h>
> +#include <rte_ethdev_vdev.h>
> +#include <rte_malloc.h>
> +#include <rte_kvargs.h>
> +#include <rte_bus_vdev.h>
> +#include <rte_string_fns.h>
> +
> +#include "rte_eth_memif.h"
> +#include "memif_socket.h"
> +
> +#define ETH_MEMIF_ID_ARG "id"
> +#define ETH_MEMIF_ROLE_ARG "role"
> +#define ETH_MEMIF_PKT_BUFFER_SIZE_ARG "bsize"
> +#define ETH_MEMIF_RING_SIZE_ARG "rsize"
> +#define ETH_MEMIF_SOCKET_ARG "socket"
> +#define ETH_MEMIF_MAC_ARG "mac"
> +#define ETH_MEMIF_ZC_ARG "zero-copy"
> +#define ETH_MEMIF_SECRET_ARG "secret"
> +
> +static const char *valid_arguments[] = {
> + ETH_MEMIF_ID_ARG,
> + ETH_MEMIF_ROLE_ARG,
> + ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
> + ETH_MEMIF_RING_SIZE_ARG,
> + ETH_MEMIF_SOCKET_ARG,
> + ETH_MEMIF_MAC_ARG,
> + ETH_MEMIF_ZC_ARG,
> + ETH_MEMIF_SECRET_ARG,
> + NULL
> +};
> +
> +const char *
> +memif_version(void)
> +{
> + return ("memif-" RTE_STR(MEMIF_VERSION_MAJOR) "."
> RTE_STR(MEMIF_VERSION_MINOR));
> +}
> +
> +static void
> +memif_dev_info(struct rte_eth_dev *dev __rte_unused, struct rte_eth_dev_info
> *dev_info)
> +{
> + dev_info->max_mac_addrs = 1;
> + dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
> + dev_info->max_rx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
> + dev_info->max_tx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
> + dev_info->min_rx_bufsize = 0;
> +}
> +
> +static memif_ring_t *
> +memif_get_ring(struct pmd_internals *pmd, memif_ring_type_t type, uint16_t
> ring_num)
> +{
> + /* rings only in region 0 */
> + void *p = pmd->regions[0]->addr;
> + int ring_size = sizeof(memif_ring_t) + sizeof(memif_desc_t) *
> + (1 << pmd->run.log2_ring_size);
> +
> + p = (uint8_t *)p + (ring_num + type * pmd->run.num_s2m_rings) *
> ring_size;
> +
> + return (memif_ring_t *)p;
> +}
> +
> +static void *
> +memif_get_buffer(struct pmd_internals *pmd, memif_desc_t *d)
> +{
> + return ((uint8_t *)pmd->regions[d->region]->addr + d->offset);
> +}
> +
> +static int
> +memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail,
> + struct rte_mbuf *tail)
> +{
> + /* Check for number-of-segments-overflow */
> + if (unlikely(head->nb_segs + tail->nb_segs > RTE_MBUF_MAX_NB_SEGS))
> + return -EOVERFLOW;
> +
> + /* Chain 'tail' onto the old tail */
> + cur_tail->next = tail;
> +
> + /* accumulate number of segments and total length. */
> + head->nb_segs = (uint16_t)(head->nb_segs + tail->nb_segs);
> +
> + tail->pkt_len = tail->data_len;
> + head->pkt_len += tail->pkt_len;
> +
> + return 0;
> +}
> +
> +static uint16_t
> +eth_memif_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
> +{
> + struct memif_queue *mq = queue;
> + struct pmd_internals *pmd = mq->pmd;
> + memif_ring_t *ring = mq->ring;
> + uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0;
> + uint16_t n_rx_pkts = 0;
> + uint16_t mbuf_size = rte_pktmbuf_data_room_size(mq->mempool) -
> + RTE_PKTMBUF_HEADROOM;
> + uint16_t src_len, src_off, dst_len, dst_off, cp_len;
> + memif_ring_type_t type = mq->type;
> + memif_desc_t *d0;
> + struct rte_mbuf *mbuf, *mbuf_head, *mbuf_tail;
> + uint64_t b;
> + ssize_t size __rte_unused;
> + uint16_t head;
> + int ret;
> +
> + if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
> + return 0;
> + if (unlikely(ring == NULL))
> + return 0;
> +
> + /* consume interrupt */
> + if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
> + size = read(mq->intr_handle.fd, &b, sizeof(b));
> +
> + ring_size = 1 << mq->log2_ring_size;
> + mask = ring_size - 1;
> +
> + cur_slot = (type == MEMIF_RING_S2M) ? mq->last_head : mq->last_tail;
> + last_slot = (type == MEMIF_RING_S2M) ? ring->head : ring->tail;
> + if (cur_slot == last_slot)
> + goto refill;
> + n_slots = last_slot - cur_slot;
> +
> + while (n_slots && n_rx_pkts < nb_pkts) {
> + mbuf_head = rte_pktmbuf_alloc(mq->mempool);
> + if (unlikely(mbuf_head == NULL))
> + goto no_free_bufs;
> + mbuf = mbuf_head;
> + mbuf->port = mq->in_port;
> +
> +next_slot:
> + s0 = cur_slot & mask;
> + d0 = &ring->desc[s0];
> +
> + src_len = d0->length;
> + dst_off = 0;
> + src_off = 0;
> +
> + do {
> + dst_len = mbuf_size - dst_off;
> + if (dst_len == 0) {
> + dst_off = 0;
> + dst_len = mbuf_size;
> +
> + /* store pointer to tail */
> + mbuf_tail = mbuf;
> + mbuf = rte_pktmbuf_alloc(mq->mempool);
> + if (unlikely(mbuf == NULL))
> + goto no_free_bufs;
> + mbuf->port = mq->in_port;
> + ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail,
> mbuf);
> + if (unlikely(ret < 0)) {
> + MIF_LOG(ERR, "%s:
> number-of-segments-overflow",
> +
> rte_vdev_device_name(pmd->vdev));
> + rte_pktmbuf_free(mbuf);
> + goto no_free_bufs;
> + }
> + }
> + cp_len = RTE_MIN(dst_len, src_len);
> +
> + rte_pktmbuf_data_len(mbuf) += cp_len;
> + rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
> + if (mbuf != mbuf_head)
> + rte_pktmbuf_pkt_len(mbuf_head) += cp_len;
> +
> + memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, dst_off),
> + (uint8_t *)memif_get_buffer(pmd, d0) + src_off,
> cp_len);
> +
> + src_off += cp_len;
> + dst_off += cp_len;
> + src_len -= cp_len;
> + } while (src_len);
> +
> + cur_slot++;
> + n_slots--;
> +
> + if (d0->flags & MEMIF_DESC_FLAG_NEXT)
> + goto next_slot;
> +
> + mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head);
> + *bufs++ = mbuf_head;
> + n_rx_pkts++;
> + }
> +
> +no_free_bufs:
> + if (type == MEMIF_RING_S2M) {
> + rte_mb();
> + ring->tail = cur_slot;
> + mq->last_head = cur_slot;
> + } else {
> + mq->last_tail = cur_slot;
> + }
> +
> +refill:
> + if (type == MEMIF_RING_M2S) {
> + head = ring->head;
> + n_slots = ring_size - head + mq->last_tail;
> +
> + while (n_slots--) {
> + s0 = head++ & mask;
> + d0 = &ring->desc[s0];
> + d0->length = pmd->run.pkt_buffer_size;
> + }
> + rte_mb();
> + ring->head = head;
> + }
> +
> + mq->n_pkts += n_rx_pkts;
> + return n_rx_pkts;
> +}
> +
> +static uint16_t
> +eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
> +{
> + struct memif_queue *mq = queue;
> + struct pmd_internals *pmd = mq->pmd;
> + memif_ring_t *ring = mq->ring;
> + uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0;
> + uint16_t src_len, src_off, dst_len, dst_off, cp_len;
> + memif_ring_type_t type = mq->type;
> + memif_desc_t *d0;
> + struct rte_mbuf *mbuf;
> + struct rte_mbuf *mbuf_head;
> + uint64_t a;
> + ssize_t size;
> +
> + if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
> + return 0;
> + if (unlikely(ring == NULL))
> + return 0;
> +
> + ring_size = 1 << mq->log2_ring_size;
> + mask = ring_size - 1;
> +
> + n_free = ring->tail - mq->last_tail;
> + mq->last_tail += n_free;
> + slot = (type == MEMIF_RING_S2M) ? ring->head : ring->tail;
> +
> + if (type == MEMIF_RING_S2M)
> + n_free = ring_size - ring->head + mq->last_tail;
> + else
> + n_free = ring->head - ring->tail;
> +
> + while (n_tx_pkts < nb_pkts && n_free) {
> + mbuf_head = *bufs++;
> + mbuf = mbuf_head;
> +
> + saved_slot = slot;
> + d0 = &ring->desc[slot & mask];
> + dst_off = 0;
> + dst_len = (type == MEMIF_RING_S2M) ?
> + pmd->run.pkt_buffer_size : d0->length;
> +
> +next_in_chain:
> + src_off = 0;
> + src_len = rte_pktmbuf_data_len(mbuf);
> +
> + while (src_len) {
> + if (dst_len == 0) {
> + if (n_free) {
> + slot++;
> + n_free--;
> + d0->flags |= MEMIF_DESC_FLAG_NEXT;
> + d0 = &ring->desc[slot & mask];
> + dst_off = 0;
> + dst_len = (type == MEMIF_RING_S2M) ?
> + pmd->run.pkt_buffer_size :
> d0->length;
> + d0->flags = 0;
> + } else {
> + slot = saved_slot;
> + goto no_free_slots;
> + }
> + }
> + cp_len = RTE_MIN(dst_len, src_len);
> +
> + memcpy((uint8_t *)memif_get_buffer(pmd, d0) + dst_off,
> + rte_pktmbuf_mtod_offset(mbuf, void *, src_off),
> + cp_len);
> +
> + mq->n_bytes += cp_len;
> + src_off += cp_len;
> + dst_off += cp_len;
> + src_len -= cp_len;
> + dst_len -= cp_len;
> +
> + d0->length = dst_off;
> + }
> +
> + if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
> + mbuf = mbuf->next;
> + goto next_in_chain;
> + }
> +
> + n_tx_pkts++;
> + slot++;
> + n_free--;
> + rte_pktmbuf_free(mbuf_head);
> + }
> +
> +no_free_slots:
> + rte_mb();
> + if (type == MEMIF_RING_S2M)
> + ring->head = slot;
> + else
> + ring->tail = slot;
> +
> + if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
> + a = 1;
> + size = write(mq->intr_handle.fd, &a, sizeof(a));
> + if (unlikely(size < 0)) {
> + MIF_LOG(WARNING,
> + "%s: Failed to send interrupt. %s",
> + rte_vdev_device_name(pmd->vdev),
> strerror(errno));
> + }
> + }
> +
> + mq->n_err += nb_pkts - n_tx_pkts;
> + mq->n_pkts += n_tx_pkts;
> + return n_tx_pkts;
> +}
> +
> +void
> +memif_free_regions(struct pmd_internals *pmd)
> +{
> + int i;
> + struct memif_region *r;
> +
> + /* regions are allocated contiguously, so it's
> + * enough to loop until 'pmd->regions_num'
> + */
> + for (i = 0; i < pmd->regions_num; i++) {
> + r = pmd->regions[i];
> + if (r != NULL) {
> + if (r->addr != NULL) {
> + munmap(r->addr, r->region_size);
> + if (r->fd > 0) {
> + close(r->fd);
> + r->fd = -1;
> + }
> + }
> + rte_free(r);
> + pmd->regions[i] = NULL;
> + }
> + }
> + pmd->regions_num = 0;
> +}
> +
> +static int
> +memif_region_init_shm(struct pmd_internals *pmd, uint8_t has_buffers)
> +{
> + char shm_name[ETH_MEMIF_SHM_NAME_SIZE];
> + int ret = 0;
> + struct memif_region *r;
> +
> + if (pmd->regions_num >= ETH_MEMIF_MAX_REGION_NUM) {
> + MIF_LOG(ERR, "%s: Too many regions.",
> rte_vdev_device_name(pmd->vdev));
> + return -1;
> + }
> +
> + r = rte_zmalloc("region", sizeof(struct memif_region), 0);
> + if (r == NULL) {
> + MIF_LOG(ERR, "%s: Failed to alloc memif region.",
> + rte_vdev_device_name(pmd->vdev));
> + return -ENOMEM;
> + }
> +
> + /* calculate buffer offset */
> + r->pkt_buffer_offset = (pmd->run.num_s2m_rings +
> pmd->run.num_m2s_rings) *
> + (sizeof(memif_ring_t) + sizeof(memif_desc_t) *
> + (1 << pmd->run.log2_ring_size));
> +
> + r->region_size = r->pkt_buffer_offset;
> + /* if region has buffers, add buffers size to region_size */
> + if (has_buffers == 1)
> + r->region_size += (uint32_t)(pmd->run.pkt_buffer_size *
> + (1 << pmd->run.log2_ring_size) *
> + (pmd->run.num_s2m_rings +
> + pmd->run.num_m2s_rings));
> +
> + memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE);
> + snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d",
> + pmd->regions_num);
> +
> + r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING);
> + if (r->fd < 0) {
> + MIF_LOG(ERR, "%s: Failed to create shm file: %s.",
> + rte_vdev_device_name(pmd->vdev),
> + strerror(errno));
> + ret = -1;
> + goto error;
> + }
> +
> + ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK);
> + if (ret < 0) {
> + MIF_LOG(ERR, "%s: Failed to add seals to shm file: %s.",
> + rte_vdev_device_name(pmd->vdev),
> + strerror(errno));
> + goto error;
> + }
> +
> + ret = ftruncate(r->fd, r->region_size);
> + if (ret < 0) {
> + MIF_LOG(ERR, "%s: Failed to truncate shm file: %s.",
> + rte_vdev_device_name(pmd->vdev),
> + strerror(errno));
> + goto error;
> + }
> +
> + r->addr = mmap(NULL, r->region_size, PROT_READ |
> + PROT_WRITE, MAP_SHARED, r->fd, 0);
> + if (r->addr == MAP_FAILED) {
> + MIF_LOG(ERR, "%s: Failed to mmap shm region: %s.",
> + rte_vdev_device_name(pmd->vdev),
> + strerror(ret));
> + ret = -1;
> + goto error;
> + }
> +
> + pmd->regions[pmd->regions_num] = r;
> + pmd->regions_num++;
> +
> + return ret;
> +
> +error:
> + if (r->fd > 0)
> + close(r->fd);
> + r->fd = -1;
> +
> + return ret;
> +}
> +
> +static int
> +memif_regions_init(struct pmd_internals *pmd)
> +{
> + int ret;
> +
> + /* create one buffer region */
> + ret = memif_region_init_shm(pmd, /* has buffer */ 1);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static void
> +memif_init_rings(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + memif_ring_t *ring;
> + int i, j;
> + uint16_t slot;
> +
> + for (i = 0; i < pmd->run.num_s2m_rings; i++) {
> + ring = memif_get_ring(pmd, MEMIF_RING_S2M, i);
> + ring->head = 0;
> + ring->tail = 0;
> + ring->cookie = MEMIF_COOKIE;
> + ring->flags = 0;
> + for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
> + slot = i * (1 << pmd->run.log2_ring_size) + j;
> + ring->desc[j].region = 0;
> + ring->desc[j].offset =
> pmd->regions[0]->pkt_buffer_offset +
> + (uint32_t)(slot * pmd->run.pkt_buffer_size);
> + ring->desc[j].length = pmd->run.pkt_buffer_size;
> + }
> + }
> +
> + for (i = 0; i < pmd->run.num_m2s_rings; i++) {
> + ring = memif_get_ring(pmd, MEMIF_RING_M2S, i);
> + ring->head = 0;
> + ring->tail = 0;
> + ring->cookie = MEMIF_COOKIE;
> + ring->flags = 0;
> + for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
> + slot = (i + pmd->run.num_s2m_rings) *
> + (1 << pmd->run.log2_ring_size) + j;
> + ring->desc[j].region = 0;
> + ring->desc[j].offset =
> pmd->regions[0]->pkt_buffer_offset +
> + (uint32_t)(slot * pmd->run.pkt_buffer_size);
> + ring->desc[j].length = pmd->run.pkt_buffer_size;
> + }
> + }
> +}
> +
> +/* called only by slave */
> +static void
> +memif_init_queues(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_queue *mq;
> + int i;
> +
> + for (i = 0; i < pmd->run.num_s2m_rings; i++) {
> + mq = dev->data->tx_queues[i];
> + mq->ring = memif_get_ring(pmd, MEMIF_RING_S2M, i);
> + mq->log2_ring_size = pmd->run.log2_ring_size;
> + /* queues located only in region 0 */
> + mq->region = 0;
> + mq->ring_offset = (uint8_t *)mq->ring - (uint8_t
> *)pmd->regions[0]->addr;
> + mq->last_head = 0;
> + mq->last_tail = 0;
> + mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
> + if (mq->intr_handle.fd < 0) {
> + MIF_LOG(WARNING,
> + "%s: Failed to create eventfd for tx queue %d:
> %s.",
> + rte_vdev_device_name(pmd->vdev), i,
> + strerror(errno));
> + }
> + }
> +
> + for (i = 0; i < pmd->run.num_m2s_rings; i++) {
> + mq = dev->data->rx_queues[i];
> + mq->ring = memif_get_ring(pmd, MEMIF_RING_M2S, i);
> + mq->log2_ring_size = pmd->run.log2_ring_size;
> + /* queues located only in region 0 */
> + mq->region = 0;
> + mq->ring_offset = (uint8_t *)mq->ring - (uint8_t
> *)pmd->regions[0]->addr;
> + mq->last_head = 0;
> + mq->last_tail = 0;
> + mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
> + if (mq->intr_handle.fd < 0) {
> + MIF_LOG(WARNING,
> + "%s: Failed to create eventfd for rx queue %d:
> %s.",
> + rte_vdev_device_name(pmd->vdev), i,
> + strerror(errno));
> + }
> + }
> +}
> +
> +int
> +memif_init_regions_and_queues(struct rte_eth_dev *dev)
> +{
> + int ret;
> +
> + ret = memif_regions_init(dev->data->dev_private);
> + if (ret < 0)
> + return ret;
> +
> + memif_init_rings(dev);
> +
> + memif_init_queues(dev);
> +
> + return 0;
> +}
> +
> +int
> +memif_connect(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_region *mr;
> + struct memif_queue *mq;
> + int i;
> +
> + for (i = 0; i < pmd->regions_num; i++) {
> + mr = pmd->regions[i];
> + if (mr != NULL) {
> + if (mr->addr == NULL) {
> + if (mr->fd < 0)
> + return -1;
> + mr->addr = mmap(NULL, mr->region_size,
> + PROT_READ | PROT_WRITE,
> + MAP_SHARED, mr->fd, 0);
> + if (mr->addr == NULL)
> + return -1;
> + }
> + }
> + }
> +
> + for (i = 0; i < pmd->run.num_s2m_rings; i++) {
> + mq = (pmd->role == MEMIF_ROLE_SLAVE) ?
> + dev->data->tx_queues[i] : dev->data->rx_queues[i];
> + mq->ring = (memif_ring_t *)((uint8_t
> *)pmd->regions[mq->region]->addr +
> + mq->ring_offset);
> + if (mq->ring->cookie != MEMIF_COOKIE) {
> + MIF_LOG(ERR, "%s: Wrong cookie",
> + rte_vdev_device_name(pmd->vdev));
> + return -1;
> + }
> + mq->ring->head = 0;
> + mq->ring->tail = 0;
> + mq->last_head = 0;
> + mq->last_tail = 0;
> + /* enable polling mode */
> + if (pmd->role == MEMIF_ROLE_MASTER)
> + mq->ring->flags = MEMIF_RING_FLAG_MASK_INT;
> + }
> + for (i = 0; i < pmd->run.num_m2s_rings; i++) {
> + mq = (pmd->role == MEMIF_ROLE_SLAVE) ?
> + dev->data->rx_queues[i] : dev->data->tx_queues[i];
> + mq->ring = (memif_ring_t *)((uint8_t
> *)pmd->regions[mq->region]->addr +
> + mq->ring_offset);
> + if (mq->ring->cookie != MEMIF_COOKIE) {
> + MIF_LOG(ERR, "%s: Wrong cookie",
> + rte_vdev_device_name(pmd->vdev));
> + return -1;
> + }
> + mq->ring->head = 0;
> + mq->ring->tail = 0;
> + mq->last_head = 0;
> + mq->last_tail = 0;
> + /* enable polling mode */
> + if (pmd->role == MEMIF_ROLE_SLAVE)
> + mq->ring->flags = MEMIF_RING_FLAG_MASK_INT;
> + }
> +
> + pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING;
> + pmd->flags |= ETH_MEMIF_FLAG_CONNECTED;
> + dev->data->dev_link.link_status = ETH_LINK_UP;
> + MIF_LOG(INFO, "%s: Connected.", rte_vdev_device_name(pmd->vdev));
> + return 0;
> +}
> +
> +static int
> +memif_dev_start(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + int ret = 0;
> +
> + switch (pmd->role) {
> + case MEMIF_ROLE_SLAVE:
> + ret = memif_connect_slave(dev);
> + break;
> + case MEMIF_ROLE_MASTER:
> + ret = memif_connect_master(dev);
> + break;
> + default:
> + MIF_LOG(ERR, "%s: Unknown role: %d.",
> + rte_vdev_device_name(pmd->vdev), pmd->role);
> + ret = -1;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static void
> +memif_dev_close(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> +
> + memif_msg_enq_disconnect(pmd->cc, "Device closed", 0);
> + memif_disconnect(dev);
> +
> + memif_socket_remove_device(dev);
> +}
> +
> +static int
> +memif_dev_configure(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> +
> + /*
> + * SLAVE - TXQ
> + * MASTER - RXQ
> + */
> + pmd->cfg.num_s2m_rings = (pmd->role == MEMIF_ROLE_SLAVE) ?
> + dev->data->nb_tx_queues :
> dev->data->nb_rx_queues;
> +
> + /*
> + * SLAVE - RXQ
> + * MASTER - TXQ
> + */
> + pmd->cfg.num_m2s_rings = (pmd->role == MEMIF_ROLE_SLAVE) ?
> + dev->data->nb_rx_queues :
> dev->data->nb_tx_queues;
> +
> + return 0;
> +}
> +
> +static int
> +memif_tx_queue_setup(struct rte_eth_dev *dev,
> + uint16_t qid,
> + uint16_t nb_tx_desc __rte_unused,
> + unsigned int socket_id __rte_unused,
> + const struct rte_eth_txconf *tx_conf __rte_unused)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_queue *mq;
> +
> + mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
> + if (mq == NULL) {
> + MIF_LOG(ERR, "%s: Failed to allocate tx queue id: %u",
> + rte_vdev_device_name(pmd->vdev), qid);
> + return -ENOMEM;
> + }
> +
> + mq->type =
> + (pmd->role == MEMIF_ROLE_SLAVE) ? MEMIF_RING_S2M : MEMIF_RING_M2S;
> + mq->n_pkts = 0;
> + mq->n_bytes = 0;
> + mq->n_err = 0;
> + mq->intr_handle.fd = -1;
> + mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
> + mq->pmd = pmd;
> + dev->data->tx_queues[qid] = mq;
> +
> + return 0;
> +}
> +
> +static int
> +memif_rx_queue_setup(struct rte_eth_dev *dev,
> + uint16_t qid,
> + uint16_t nb_rx_desc __rte_unused,
> + unsigned int socket_id __rte_unused,
> + const struct rte_eth_rxconf *rx_conf __rte_unused,
> + struct rte_mempool *mb_pool)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_queue *mq;
> +
> + mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
> + if (mq == NULL) {
> + MIF_LOG(ERR, "%s: Failed to allocate rx queue id: %u",
> + rte_vdev_device_name(pmd->vdev), qid);
> + return -ENOMEM;
> + }
> +
> + mq->type = (pmd->role == MEMIF_ROLE_SLAVE) ? MEMIF_RING_M2S :
> MEMIF_RING_S2M;
> + mq->n_pkts = 0;
> + mq->n_bytes = 0;
> + mq->n_err = 0;
> + mq->intr_handle.fd = -1;
> + mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
> + mq->mempool = mb_pool;
> + mq->in_port = dev->data->port_id;
> + mq->pmd = pmd;
> + dev->data->rx_queues[qid] = mq;
> +
> + return 0;
> +}
> +
> +static void
> +memif_queue_release(void *queue)
> +{
> + struct memif_queue *mq = (struct memif_queue *)queue;
> +
> + if (!mq)
> + return;
> +
> + rte_free(mq);
> +}
> +
> +static int
> +memif_link_update(struct rte_eth_dev *dev __rte_unused,
> + int wait_to_complete __rte_unused)
> +{
> + return 0;
> +}
> +
> +static int
> +memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + struct memif_queue *mq;
> + int i;
> + uint8_t tmp, nq;
> +
> + stats->ipackets = 0;
> + stats->ibytes = 0;
> + stats->opackets = 0;
> + stats->obytes = 0;
> + stats->oerrors = 0;
> +
> + tmp = (pmd->role == MEMIF_ROLE_SLAVE) ? pmd->run.num_s2m_rings :
> + pmd->run.num_m2s_rings;
> + nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
> + RTE_ETHDEV_QUEUE_STAT_CNTRS;
> +
> + /* RX stats */
> + for (i = 0; i < nq; i++) {
> + mq = dev->data->rx_queues[i];
> + stats->q_ipackets[i] = mq->n_pkts;
> + stats->q_ibytes[i] = mq->n_bytes;
> + stats->ipackets += mq->n_pkts;
> + stats->ibytes += mq->n_bytes;
> + }
> +
> + tmp = (pmd->role == MEMIF_ROLE_SLAVE) ? pmd->run.num_m2s_rings :
> + pmd->run.num_s2m_rings;
> + nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
> + RTE_ETHDEV_QUEUE_STAT_CNTRS;
> +
> + /* TX stats */
> + for (i = 0; i < nq; i++) {
> + mq = dev->data->tx_queues[i];
> + stats->q_opackets[i] = mq->n_pkts;
> + stats->q_obytes[i] = mq->n_bytes;
> + stats->opackets += mq->n_pkts;
> + stats->obytes += mq->n_bytes;
> + stats->oerrors += mq->n_err;
> + }
> + return 0;
> +}
> +
> +static void
> +memif_stats_reset(struct rte_eth_dev *dev)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> + int i;
> + struct memif_queue *mq;
> +
> + for (i = 0; i < pmd->run.num_s2m_rings; i++) {
> + mq = (pmd->role == MEMIF_ROLE_SLAVE) ? dev->data->tx_queues[i] :
> + dev->data->rx_queues[i];
> + mq->n_pkts = 0;
> + mq->n_bytes = 0;
> + mq->n_err = 0;
> + }
> + for (i = 0; i < pmd->run.num_m2s_rings; i++) {
> + mq = (pmd->role == MEMIF_ROLE_SLAVE) ? dev->data->rx_queues[i] :
> + dev->data->tx_queues[i];
> + mq->n_pkts = 0;
> + mq->n_bytes = 0;
> + mq->n_err = 0;
> + }
> +}
> +
> +static int
> +memif_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t qid
> __rte_unused)
> +{
> + struct pmd_internals *pmd = dev->data->dev_private;
> +
> + MIF_LOG(WARNING, "%s: Interrupt mode not supported.",
> + rte_vdev_device_name(pmd->vdev));
> +
> + return -1;
> +}
> +
> +static int
> +memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid
> __rte_unused)
> +{
> + struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
> +
> + return 0;
> +}
> +
> +static const struct eth_dev_ops ops = {
> + .dev_start = memif_dev_start,
> + .dev_close = memif_dev_close,
> + .dev_infos_get = memif_dev_info,
> + .dev_configure = memif_dev_configure,
> + .tx_queue_setup = memif_tx_queue_setup,
> + .rx_queue_setup = memif_rx_queue_setup,
> + .rx_queue_release = memif_queue_release,
> + .tx_queue_release = memif_queue_release,
> + .rx_queue_intr_enable = memif_rx_queue_intr_enable,
> + .rx_queue_intr_disable = memif_rx_queue_intr_disable,
> + .link_update = memif_link_update,
> + .stats_get = memif_stats_get,
> + .stats_reset = memif_stats_reset,
> +};
> +
> +static int
> +memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
> + memif_interface_id_t id, uint32_t flags,
> + const char *socket_filename,
> + memif_log2_ring_size_t log2_ring_size,
> + uint16_t pkt_buffer_size, const char *secret,
> + struct rte_ether_addr *ether_addr)
> +{
> + int ret = 0;
> + struct rte_eth_dev *eth_dev;
> + struct rte_eth_dev_data *data;
> + struct pmd_internals *pmd;
> + const unsigned int numa_node = vdev->device.numa_node;
> + const char *name = rte_vdev_device_name(vdev);
> +
> + if (flags & ETH_MEMIF_FLAG_ZERO_COPY) {
> + MIF_LOG(ERR, "Zero-copy slave not supported.");
> + return -1;
> + }
> +
> + eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
> + if (eth_dev == NULL) {
> + MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
> + return -1;
> + }
> +
> + pmd = eth_dev->data->dev_private;
> + memset(pmd, 0, sizeof(*pmd));
> +
> + pmd->vdev = vdev;
> + pmd->id = id;
> + pmd->flags = flags;
> + pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
> + pmd->role = role;
> +
> + ret = memif_socket_init(eth_dev, socket_filename);
> + if (ret < 0)
> + return ret;
> +
> + memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE);
> + if (secret != NULL)
> + strlcpy(pmd->secret, secret, sizeof(pmd->secret));
> +
> + pmd->cfg.log2_ring_size = log2_ring_size;
> + /* set in .dev_configure() */
> + pmd->cfg.num_s2m_rings = 0;
> + pmd->cfg.num_m2s_rings = 0;
> +
> + pmd->cfg.pkt_buffer_size = pkt_buffer_size;
> +
> + data = eth_dev->data;
> + data->dev_private = pmd;
> + data->numa_node = numa_node;
> + data->mac_addrs = ether_addr;
> +
> + eth_dev->dev_ops = &ops;
> + eth_dev->device = &vdev->device;
> + eth_dev->rx_pkt_burst = eth_memif_rx;
> + eth_dev->tx_pkt_burst = eth_memif_tx;
> +
> + eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
> +
> + rte_eth_dev_probing_finish(eth_dev);
> +
> + return 0;
> +}
> +
> +static int
> +memif_set_role(const char *key __rte_unused, const char *value,
> + void *extra_args)
> +{
> + enum memif_role_t *role = (enum memif_role_t *)extra_args;
> +
> + if (strstr(value, "master") != NULL) {
> + *role = MEMIF_ROLE_MASTER;
> + } else if (strstr(value, "slave") != NULL) {
> + *role = MEMIF_ROLE_SLAVE;
> + } else {
> + MIF_LOG(ERR, "Unknown role: %s.", value);
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static int
> +memif_set_zc(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + uint32_t *flags = (uint32_t *)extra_args;
> +
> + if (strstr(value, "yes") != NULL) {
> + *flags |= ETH_MEMIF_FLAG_ZERO_COPY;
> + } else if (strstr(value, "no") != NULL) {
> + *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
> + } else {
> + MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value);
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static int
> +memif_set_id(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + memif_interface_id_t *id = (memif_interface_id_t *)extra_args;
> +
> + /* even if parsing fails, 0 is a valid id */
> + *id = strtoul(value, NULL, 10);
> + return 0;
> +}
> +
> +static int
> +memif_set_bs(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + unsigned long tmp;
> + uint16_t *pkt_buffer_size = (uint16_t *)extra_args;
> +
> + tmp = strtoul(value, NULL, 10);
> + if (tmp == 0 || tmp > 0xFFFF) {
> + MIF_LOG(ERR, "Invalid buffer size: %s.", value);
> + return -EINVAL;
> + }
> + *pkt_buffer_size = tmp;
> + return 0;
> +}
> +
> +static int
> +memif_set_rs(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + unsigned long tmp;
> + memif_log2_ring_size_t *log2_ring_size =
> + (memif_log2_ring_size_t *)extra_args;
> +
> + tmp = strtoul(value, NULL, 10);
> + if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) {
> + MIF_LOG(ERR, "Invalid ring size: %s (max %u).",
> + value, ETH_MEMIF_MAX_LOG2_RING_SIZE);
> + return -EINVAL;
> + }
> + *log2_ring_size = tmp;
> + return 0;
> +}
> +
> +/* check if directory exists and if we have permission to read/write */
> +static int
> +memif_check_socket_filename(const char *filename)
> +{
> + char *dir = NULL, *tmp;
> + uint32_t idx;
> + int ret = 0;
> +
> + tmp = strrchr(filename, '/');
> + if (tmp != NULL) {
> + idx = tmp - filename;
> + dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0);
> + if (dir == NULL) {
> + MIF_LOG(ERR, "Failed to allocate memory.");
> + return -1;
> + }
> + strlcpy(dir, filename, sizeof(char) * (idx + 1));
> + }
> +
> + if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK |
> + W_OK, AT_EACCESS) < 0)) {
> + MIF_LOG(ERR, "Invalid socket directory.");
> + ret = -EINVAL;
> + }
> +
> + if (dir != NULL)
> + rte_free(dir);
> +
> + return ret;
> +}
> +
> +static int
> +memif_set_socket_filename(const char *key __rte_unused, const char *value,
> + void *extra_args)
> +{
> + const char **socket_filename = (const char **)extra_args;
> +
> + *socket_filename = value;
> + return memif_check_socket_filename(*socket_filename);
> +}
> +
> +static int
> +memif_set_mac(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args;
> + int ret = 0;
> +
> + ret = sscanf(value, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
> + ðer_addr->addr_bytes[0], ðer_addr->addr_bytes[1],
> + ðer_addr->addr_bytes[2], ðer_addr->addr_bytes[3],
> + ðer_addr->addr_bytes[4], ðer_addr->addr_bytes[5]);
> + if (ret != 6)
> + MIF_LOG(WARNING, "Failed to parse mac '%s'.", value);
> + return 0;
> +}
> +
> +static int
> +memif_set_secret(const char *key __rte_unused, const char *value, void
> *extra_args)
> +{
> + const char **secret = (const char **)extra_args;
> +
> + *secret = value;
> + return 0;
> +}
> +
> +static int
> +rte_pmd_memif_probe(struct rte_vdev_device *vdev)
> +{
> + RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128);
> + RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16);
> + int ret = 0;
> + struct rte_kvargs *kvlist;
> + const char *name = rte_vdev_device_name(vdev);
> + enum memif_role_t role = MEMIF_ROLE_SLAVE;
> + memif_interface_id_t id = 0;
> + uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
> + memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
> + const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
> + uint32_t flags = 0;
> + const char *secret = NULL;
> + struct rte_ether_addr *ether_addr = rte_zmalloc("", sizeof(struct
> rte_ether_addr), 0);
> +
> + rte_eth_random_addr(ether_addr->addr_bytes);
> +
> + MIF_LOG(INFO, "Initialize MEMIF: %s.", name);
> +
> + if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
> + MIF_LOG(ERR, "Multi-processing not supported for memif.");
> + /* TODO:
> + * Request connection information.
> + *
> + * Once memif in the primary process is connected,
> + * broadcast connection information.
> + */
> + return -1;
> + }
> +
> + kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
> +
> + /* parse parameters */
> + if (kvlist != NULL) {
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG,
> + &memif_set_role, &role);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG,
> + &memif_set_id, &id);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
> + &memif_set_bs, &pkt_buffer_size);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG,
> + &memif_set_rs, &log2_ring_size);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG,
> + &memif_set_socket_filename,
> + (void *)(&socket_filename));
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
> + &memif_set_mac, ether_addr);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG,
> + &memif_set_zc, &flags);
> + if (ret < 0)
> + goto exit;
> + ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG,
> + &memif_set_secret, (void *)(&secret));
> + if (ret < 0)
> + goto exit;
> + }
> +
> + /* create interface */
> + ret = memif_create(vdev, role, id, flags, socket_filename,
> + log2_ring_size, pkt_buffer_size, secret, ether_addr);
> +
> +exit:
> + if (kvlist != NULL)
> + rte_kvargs_free(kvlist);
> + return ret;
> +}
> +
> +static int
> +rte_pmd_memif_remove(struct rte_vdev_device *vdev)
> +{
> + struct rte_eth_dev *eth_dev;
> + int i;
> +
> + eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev));
> + if (eth_dev == NULL)
> + return 0;
> +
> + for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
> +
> (*eth_dev->dev_ops->rx_queue_release)(eth_dev->data->rx_queues[i]);
> + for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
> +
> (*eth_dev->dev_ops->rx_queue_release)(eth_dev->data->tx_queues[i]);
> +
> + rte_free(eth_dev->process_private);
> + eth_dev->process_private = NULL;
> +
> + rte_eth_dev_close(eth_dev->data->port_id);
> +
> + return 0;
> +}
> +
> +static struct rte_vdev_driver pmd_memif_drv = {
> + .probe = rte_pmd_memif_probe,
> + .remove = rte_pmd_memif_remove,
> +};
> +
> +RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv);
> +
> +RTE_PMD_REGISTER_PARAM_STRING(net_memif,
> + ETH_MEMIF_ID_ARG "=<int>"
> + ETH_MEMIF_ROLE_ARG "=master|slave"
> + ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
> + ETH_MEMIF_RING_SIZE_ARG "=<int>"
> + ETH_MEMIF_SOCKET_ARG "=<string>"
> + ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
> + ETH_MEMIF_ZC_ARG "=yes|no"
> + ETH_MEMIF_SECRET_ARG "=<string>");
> +
> +int memif_logtype;
> +
> +RTE_INIT(memif_init_log)
> +{
> + memif_logtype = rte_log_register("pmd.net.memif");
> + if (memif_logtype >= 0)
> + rte_log_set_level(memif_logtype, RTE_LOG_NOTICE);
> +}
> diff --git a/drivers/net/memif/rte_eth_memif.h
> b/drivers/net/memif/rte_eth_memif.h
> new file mode 100644
> index 000000000..8cee2643c
> --- /dev/null
> +++ b/drivers/net/memif/rte_eth_memif.h
> @@ -0,0 +1,212 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved.
> + */
> +
> +#ifndef _RTE_ETH_MEMIF_H_
> +#define _RTE_ETH_MEMIF_H_
> +
> +#ifndef _GNU_SOURCE
> +#define _GNU_SOURCE
> +#endif /* GNU_SOURCE */
> +
> +#include <sys/queue.h>
> +
> +#include <rte_ethdev_driver.h>
> +#include <rte_ether.h>
> +#include <rte_interrupts.h>
> +
> +#include "memif.h"
> +
> +#define ETH_MEMIF_DEFAULT_SOCKET_FILENAME "/run/memif.sock"
> +#define ETH_MEMIF_DEFAULT_RING_SIZE 10
> +#define ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE 2048
> +
> +#define ETH_MEMIF_MAX_NUM_Q_PAIRS 255
> +#define ETH_MEMIF_MAX_LOG2_RING_SIZE 14
> +#define ETH_MEMIF_MAX_REGION_NUM 256
> +
> +#define ETH_MEMIF_SHM_NAME_SIZE 32
> +#define ETH_MEMIF_DISC_STRING_SIZE 96
> +#define ETH_MEMIF_SECRET_SIZE 24
> +
> +extern int memif_logtype;
> +
> +#define MIF_LOG(level, fmt, args...) \
> + rte_log(RTE_LOG_ ## level, memif_logtype, \
> + "%s(): " fmt "\n", __func__, ##args)
> +
> +enum memif_role_t {
> + MEMIF_ROLE_MASTER,
> + MEMIF_ROLE_SLAVE,
> +};
> +
> +struct memif_region {
> + void *addr; /**< shared memory address */
> + memif_region_size_t region_size; /**< shared memory size */
> + int fd; /**< shared memory file
> descriptor */
> + uint32_t pkt_buffer_offset;
> + /**< offset from 'addr' to first packet buffer */
> +};
> +
> +struct memif_queue {
> + struct rte_mempool *mempool; /**< mempool for RX packets */
> + struct pmd_internals *pmd; /**< device internals */
> +
> + memif_ring_type_t type; /**< ring type */
> + memif_region_index_t region; /**< shared memory region index
> */
> +
> + uint16_t in_port; /**< port id */
> +
> + memif_region_offset_t ring_offset;
> + /**< ring offset from start of shm region (ring - memif_region.addr) */
> +
> + uint16_t last_head; /**< last ring head */
> + uint16_t last_tail; /**< last ring tail */
> +
> + /* rx/tx info */
> + uint64_t n_pkts; /**< number of rx/tx packets */
> + uint64_t n_bytes; /**< number of rx/tx bytes */
> + uint64_t n_err; /**< number of tx errors */
> +
> + memif_ring_t *ring; /**< pointer to ring */
> +
> + struct rte_intr_handle intr_handle; /**< interrupt handle */
> +
> + memif_log2_ring_size_t log2_ring_size; /**< log2 of ring size */
> +};
> +
> +struct pmd_internals {
> + memif_interface_id_t id; /**< unique id */
> + enum memif_role_t role; /**< device role */
> + uint32_t flags; /**< device status flags */
> +#define ETH_MEMIF_FLAG_CONNECTING (1 << 0)
> +/**< device is connecting */
> +#define ETH_MEMIF_FLAG_CONNECTED (1 << 1)
> +/**< device is connected */
> +#define ETH_MEMIF_FLAG_ZERO_COPY (1 << 2)
> +/**< device is zero-copy enabled */
> +#define ETH_MEMIF_FLAG_DISABLED (1 << 3)
> +/**< device has not been configured and can not accept connection requests */
> +
> + char *socket_filename; /**< pointer to socket filename
> */
> + char secret[ETH_MEMIF_SECRET_SIZE]; /**< secret (optional security
> parameter) */
> +
> + struct memif_control_channel *cc; /**< control channel */
> +
> + struct memif_region *regions[ETH_MEMIF_MAX_REGION_NUM];
> + /**< shared memory regions */
> + memif_region_index_t regions_num; /**< number of regions */
> +
> + /* remote info */
> + char remote_name[RTE_DEV_NAME_MAX_LEN]; /**< remote app name */
> + char remote_if_name[RTE_DEV_NAME_MAX_LEN]; /**< remote peer name */
> +
> + struct {
> + memif_log2_ring_size_t log2_ring_size; /**< log2 of ring size */
> + uint8_t num_s2m_rings; /**< number of slave to master
> rings */
> + uint8_t num_m2s_rings; /**< number of master to slave
> rings */
> + uint16_t pkt_buffer_size; /**< buffer size */
> + } cfg; /**< Configured parameters (max
> values) */
> +
> + struct {
> + memif_log2_ring_size_t log2_ring_size; /**< log2 of ring size */
> + uint8_t num_s2m_rings; /**< number of slave to master
> rings */
> + uint8_t num_m2s_rings; /**< number of master to slave
> rings */
> + uint16_t pkt_buffer_size; /**< buffer size */
> + } run;
> + /**< Parameters used in active connection */
> +
> + char local_disc_string[ETH_MEMIF_DISC_STRING_SIZE];
> + /**< local disconnect reason */
> + char remote_disc_string[ETH_MEMIF_DISC_STRING_SIZE];
> + /**< remote disconnect reason */
> +
> + struct rte_vdev_device *vdev; /**< vdev handle */
> +};
> +
> +/**
> + * Unmap shared memory and free regions from memory.
> + *
> + * @param pmd
> + * device internals
> + */
> +void memif_free_regions(struct pmd_internals *pmd);
> +
> +/**
> + * Finalize connection establishment process. Map shared memory file
> + * (master role), initialize ring queue, set link status up.
> + *
> + * @param pmd
> + * device internals
> + * @return
> + * - On success, zero.
> + * - On failure, a negative value.
> + */
> +int memif_connect(struct rte_eth_dev *dev);
> +
> +/**
> + * Create shared memory file and initialize ring queue.
> + * Only called by slave when establishing connection
> + *
> + * @param pmd
> + * device internals
> + * @return
> + * - On success, zero.
> + * - On failure, a negative value.
> + */
> +int memif_init_regions_and_queues(struct rte_eth_dev *dev);
> +
> +/**
> + * Get memif version string.
> + *
> + * @return
> + * - memif version string
> + */
> +const char *memif_version(void);
> +
> +#ifndef MFD_HUGETLB
> +#ifndef __NR_memfd_create
> +
> +#if defined __x86_64__
> +#define __NR_memfd_create 319
> +#elif defined __x86_32__
> +#define __NR_memfd_create 1073742143
> +#elif defined __arm__
> +#define __NR_memfd_create 385
> +#elif defined __aarch64__
> +#define __NR_memfd_create 279
> +#elif defined __powerpc__
> +#define __NR_memfd_create 360
> +#elif defined __i386__
> +#define __NR_memfd_create 356
> +#else
> +#error "__NR_memfd_create unknown for this architecture"
> +#endif
> +
> +#endif /* __NR_memfd_create */
> +
> +static inline int memfd_create(const char *name, unsigned int flags)
> +{
> + return syscall(__NR_memfd_create, name, flags);
> +}
> +#endif /* MFD_HUGETLB */
> +
> +#ifndef F_LINUX_SPECIFIC_BASE
> +#define F_LINUX_SPECIFIC_BASE 1024
> +#endif
> +
> +#ifndef MFD_ALLOW_SEALING
> +#define MFD_ALLOW_SEALING 0x0002U
> +#endif
> +
> +#ifndef F_ADD_SEALS
> +#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
> +#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
> +
> +#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set
> */
> +#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
> +#define F_SEAL_GROW 0x0004 /* prevent file from growing */
> +#define F_SEAL_WRITE 0x0008 /* prevent writes */
> +#endif
> +
> +#endif /* RTE_ETH_MEMIF_H */
> diff --git a/drivers/net/memif/rte_pmd_memif_version.map
> b/drivers/net/memif/rte_pmd_memif_version.map
> new file mode 100644
> index 000000000..8861484fb
> --- /dev/null
> +++ b/drivers/net/memif/rte_pmd_memif_version.map
> @@ -0,0 +1,4 @@
> +DPDK_19.08 {
> +
> + local: *;
> +};
> diff --git a/drivers/net/meson.build b/drivers/net/meson.build
> index ed99896c3..b57073483 100644
> --- a/drivers/net/meson.build
> +++ b/drivers/net/meson.build
> @@ -24,6 +24,7 @@ drivers = ['af_packet',
> 'ixgbe',
> 'kni',
> 'liquidio',
> + 'memif',
> 'mlx4',
> 'mlx5',
> 'mvneta',
> diff --git a/mk/rte.app.mk b/mk/rte.app.mk
> index 7c9b4b538..326b2a30b 100644
> --- a/mk/rte.app.mk
> +++ b/mk/rte.app.mk
> @@ -174,6 +174,7 @@ ifeq ($(CONFIG_RTE_LIBRTE_KNI),y)
> _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_KNI) += -lrte_pmd_kni
> endif
> _LDLIBS-$(CONFIG_RTE_LIBRTE_LIO_PMD) += -lrte_pmd_lio
> +_LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_MEMIF) += -lrte_pmd_memif
> _LDLIBS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += -lrte_pmd_mlx4
> _LDLIBS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += -lrte_pmd_mlx5 -lmnl
> ifeq ($(CONFIG_RTE_IBVERBS_LINK_DLOPEN),y)
> --
> 2.17.1
