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Message-ID: <cover.1424181053.git.stathis.voukelatos@linn.co.uk> Date: Tue, 17 Feb 2015 14:03:30 +0000 From: Stathis Voukelatos <stathis.voukelatos@...n.co.uk> To: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, <netdev@...r.kernel.org> CC: <abrestic@...omium.org>, Stathis Voukelatos <stathis.voukelatos@...n.co.uk> Subject: [PATCH v2 0/3] net: Linn Ethernet Packet Sniffer driver This patch adds support the Ethernet Packet Sniffer H/W module developed by Linn Products Ltd and found in the IMG Pistachio SoC. The module allows Ethernet packets to be parsed, matched against a user-defined pattern and timestamped. It sits between a 100M Ethernet MAC and PHY and is completely passive with respect to Ethernet frames. Matched packet bytes and timestamp values are returned through a FIFO. Timestamps are provided to the module through an externally generated Gray-encoded counter. The command string for packet matching is stored in module RAM and consists of a sequence of 16-bit entries. Each entry includes an 8-bit command code and and 8-bit data value. Valid command codes are: 0 - Don't care 1 - Match: packet data must match command string byte 2 - Copy: packet data will be copied to FIFO 3 - Match/Stamp: if packet data matches string byte, a timestamp is copied into the FIFO 4 - Copy/Done: packet data will be copied into the FIFO. This command terminates the command string. The driver consists of two modules: - Core: it provides a common framework for managing backend packet sniffer implementations. Each backend channel is registered by the core as a netdev, which can be accessed from user space through a raw packet socket. - Ethernet Packet Sniffer backend: provides the driver for the Linn Ethernet Packet Sniffer H/W modules. The split between a core and backend modules allows for other implementations to be added in the future apart of the Ethernet packet sniffer presented in this patch set. Changes: v2: * Complete redesign of core framework to use netdev instead of the generic netlink framework * Updated device tree binding * A number of minor code improvements suggested by code review Stathis Voukelatos (3): Ethernet packet sniffer: Device tree binding and vendor prefix Packet sniffer core framework Linn Ethernet packet sniffer driver .../bindings/net/linn-ether-packet-sniffer.txt | 42 +++ .../devicetree/bindings/vendor-prefixes.txt | 1 + MAINTAINERS | 6 + drivers/net/Kconfig | 2 + drivers/net/Makefile | 2 + drivers/net/pkt-sniffer/Kconfig | 19 + drivers/net/pkt-sniffer/Makefile | 7 + drivers/net/pkt-sniffer/backends/ether/channel.c | 392 +++++++++++++++++++++ drivers/net/pkt-sniffer/backends/ether/channel.h | 81 +++++ drivers/net/pkt-sniffer/backends/ether/hw.h | 46 +++ drivers/net/pkt-sniffer/backends/ether/platform.c | 301 ++++++++++++++++ drivers/net/pkt-sniffer/core/module.c | 37 ++ drivers/net/pkt-sniffer/core/netdev.c | 254 +++++++++++++ drivers/net/pkt-sniffer/core/snf_core.h | 60 ++++ include/uapi/linux/pkt_sniffer.h | 33 ++ 15 files changed, 1283 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/linn-ether-packet-sniffer.txt create mode 100644 drivers/net/pkt-sniffer/Kconfig create mode 100644 drivers/net/pkt-sniffer/Makefile create mode 100644 drivers/net/pkt-sniffer/backends/ether/channel.c create mode 100644 drivers/net/pkt-sniffer/backends/ether/channel.h create mode 100644 drivers/net/pkt-sniffer/backends/ether/hw.h create mode 100644 drivers/net/pkt-sniffer/backends/ether/platform.c create mode 100644 drivers/net/pkt-sniffer/core/module.c create mode 100644 drivers/net/pkt-sniffer/core/netdev.c create mode 100644 drivers/net/pkt-sniffer/core/snf_core.h create mode 100644 include/uapi/linux/pkt_sniffer.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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