From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752745AbbBWOa7 (ORCPT ); Mon, 23 Feb 2015 09:30:59 -0500 Received: from mail.linn.co.uk ([195.59.102.251]:59482 "EHLO mail.linn.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752076AbbBWOa4 (ORCPT ); Mon, 23 Feb 2015 09:30:56 -0500 From: Stathis Voukelatos To: , , CC: Stathis Voukelatos Subject: [PATCH v3 0/3] net: Linn Ethernet Packet Sniffer driver Date: Mon, 23 Feb 2015 14:26:19 +0000 Message-ID: X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.2.10.132] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 for v3: * Code moved into vendor specific directory * Device tree binding updated and streamlined. Cyclecounter params are now calculated dynamically. Changes for 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 | 39 ++ .../devicetree/bindings/vendor-prefixes.txt | 1 + MAINTAINERS | 6 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/linn/Kconfig | 36 ++ drivers/net/ethernet/linn/Makefile | 20 + .../linn/pkt-sniffer/backends/ether/Makefile | 20 + .../linn/pkt-sniffer/backends/ether/channel.c | 455 +++++++++++++++++++++ .../linn/pkt-sniffer/backends/ether/channel.h | 80 ++++ .../ethernet/linn/pkt-sniffer/backends/ether/hw.h | 46 +++ .../linn/pkt-sniffer/backends/ether/platform.c | 286 +++++++++++++ .../net/ethernet/linn/pkt-sniffer/core/Makefile | 20 + .../net/ethernet/linn/pkt-sniffer/core/module.c | 37 ++ .../net/ethernet/linn/pkt-sniffer/core/netdev.c | 254 ++++++++++++ .../net/ethernet/linn/pkt-sniffer/core/snf_core.h | 60 +++ 16 files changed, 1362 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/linn-ether-packet-sniffer.txt create mode 100644 drivers/net/ethernet/linn/Kconfig create mode 100644 drivers/net/ethernet/linn/Makefile create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/backends/ether/Makefile create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/backends/ether/channel.c create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/backends/ether/channel.h create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/backends/ether/hw.h create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/backends/ether/platform.c create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/core/Makefile create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/core/module.c create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/core/netdev.c create mode 100644 drivers/net/ethernet/linn/pkt-sniffer/core/snf_core.h -- 1.9.1