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From: Sujeev Dias <sdias@codeaurora.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Arnd Bergmann <arnd@arndb.de>
Cc: Sujeev Dias <sdias@codeaurora.org>,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Tony Truong <truong@codeaurora.org>
Subject: MHI initial design review
Date: Thu, 26 Apr 2018 19:23:27 -0700
Message-ID: <1524795811-21399-1-git-send-email-sdias@codeaurora.org> (raw)

Hi Greg Kroah-Hartman\All

This is the initial submit of Modem Host Interface (MHI) stack for upstream
consideration. MHI is a communication protocol to communicate with external
Qualcomm modems and Wi-Fi chipsets over high speed peripheral buses. Even
though MHI doesn’t dictate underlying physical layer, protocol and mhi stack
is structured for PCIe based devices.

For additional details related to MHI interface please see Documentation/mhi.txt.

MHI stack partitioned into three main components:
1. Core layer  handles all MHI protocol specific actions such as firmware download,
   and data transfer
   /drivers/bus/mhi/core/*
2. Control layer  bus master, manages power transitions of external modem.
  /drivers/bus/mhi/controllers/*
3. Device drivers  MHI channels (physical transport channels) exposed as mhi devices
   for clients to send and receive data.
  /drivers/bus/mhi/device/*

There are three ways which clients can interface with MHI framework to send and receive
data from external modem.

1. Register directly with mhi core layer as a mhi device driver
2. User space clients can interface via mhi_uci driver.
3. For net traffic, mhi_netdev can be used.

Can you please do a high-level design review of the MHI driver and let me know if I need to
make any design changes before the drivers can be considered for upstream.

Thanks
Sujeev

   

             reply index

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27  2:23 Sujeev Dias [this message]
2018-04-27  2:23 ` [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface Sujeev Dias
2018-04-27  7:22   ` Greg Kroah-Hartman
2018-04-28 14:28     ` Sujeev Dias
2018-04-28 15:50       ` Greg Kroah-Hartman
2018-04-27  7:23   ` Greg Kroah-Hartman
2018-04-27 12:18   ` Arnd Bergmann
2018-04-28 16:08     ` Sujeev Dias
2018-04-28  0:28   ` kbuild test robot
2018-04-28  2:52   ` kbuild test robot
2018-05-03 19:21   ` Pavel Machek
2018-05-04  3:05     ` Sujeev Dias
2018-06-22 23:03   ` Randy Dunlap
2018-04-27  2:23 ` [PATCH v1 2/4] mhi_bus: controller: MHI support for QCOM modems Sujeev Dias
2018-04-27 11:32   ` Arnd Bergmann
2018-04-28 15:40     ` Sujeev Dias
2018-04-28  3:05   ` kbuild test robot
2018-04-28  3:12   ` kbuild test robot
2018-04-27  2:23 ` [PATCH v1 3/4] mhi_bus: dev: netdev: add network interface driver Sujeev Dias
2018-04-27 11:19   ` Arnd Bergmann
2018-04-28 15:25     ` Sujeev Dias
2018-04-27  2:23 ` [PATCH v1 4/4] mhi_bus: dev: uci: add user space " Sujeev Dias
2018-04-27 11:36   ` Arnd Bergmann
2018-04-28  1:03   ` kbuild test robot
2018-04-28  5:16   ` [PATCH] mhi_bus: dev: uci: fix semicolon.cocci warnings kbuild test robot
2018-04-28  5:16   ` [PATCH v1 4/4] mhi_bus: dev: uci: add user space interface driver kbuild test robot
2018-07-09 20:08 ` MHI code review Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 1/7] mhi_bus: core: initial checkin for modem host interface bus driver Sujeev Dias
2018-07-09 20:50     ` Greg Kroah-Hartman
2018-07-09 20:52     ` Greg Kroah-Hartman
2018-07-10  6:36     ` Greg Kroah-Hartman
2018-07-11 19:30     ` Rob Herring
2018-08-09 18:39     ` Randy Dunlap
2018-07-09 20:08   ` [PATCH v2 2/7] mhi_bus: core: add power management support Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 3/7] mhi_bus: core: add support for data transfer Sujeev Dias
2018-07-10  6:29     ` Greg Kroah-Hartman
2018-07-09 20:08   ` [PATCH v2 4/7] mhi_bus: core: add support for handling ioctl cmds Sujeev Dias
2018-07-09 20:08   ` [PATCH v2 5/7] mhi_bus: core: add support to get external modem time Sujeev Dias
2018-07-11 19:32     ` Rob Herring
2018-08-09 20:17     ` Randy Dunlap
2018-07-09 20:08   ` [PATCH v2 6/7] mhi_bus: controller: MHI support for QCOM modems Sujeev Dias
2018-07-11 19:36     ` Rob Herring
2018-07-09 20:08   ` [PATCH v2 7/7] mhi_bus: dev: uci: add user space interface driver Sujeev Dias
2019-04-30 15:10   ` MHI code review Daniele Palmas
2019-06-12 17:54     ` Sujeev Dias
2019-06-12 20:58       ` Daniele Palmas
2019-06-12 18:00     ` Sujeev Dias

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