On Tue, Jul 5, 2016 at 5:04 AM, Joseph Lo <josephl@xxxxxxxxxx> wrote: > The Inter-VM communication (IVC) is a communication protocol, which is > designed for interprocessor communication (IPC) or the communication > between the hypervisor and the virtual machine with a guest OS on it. So > it can be translated as inter-virtual memory or inter-virtual machine > communication. The message channels are maintained on the DRAM or SRAM > and the data coherency should be considered. Or the data could be > corrupted or out of date when the remote client checking it. > > Inside the IVC, it maintains memory-based descriptors for the TX/RX > channels and the coherency issue of the counter and payloads. So the > clients can use it to send/receive messages to/from remote ones. > > We introduce it as a library for the firmware drivers, which can use it > for IPC. > > Based-on-the-work-by: > Peter Newman <pnewman@xxxxxxxxxx> > > Signed-off-by: Joseph Lo <josephl@xxxxxxxxxx> > --- > Changes in V2: > - None > --- > drivers/firmware/Kconfig | 1 + > drivers/firmware/Makefile | 1 + > drivers/firmware/tegra/Kconfig | 13 + > drivers/firmware/tegra/Makefile | 1 + > drivers/firmware/tegra/ivc.c | 659 ++++++++++++++++++++++++++++++++++++++++ > include/soc/tegra/ivc.h | 102 +++++++ > 6 files changed, 777 insertions(+) > create mode 100644 drivers/firmware/tegra/Kconfig > create mode 100644 drivers/firmware/tegra/Makefile > create mode 100644 drivers/firmware/tegra/ivc.c > create mode 100644 include/soc/tegra/ivc.h > > diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig > index 5e618058defe..bbd64ae8c4c6 100644 > --- a/drivers/firmware/Kconfig > +++ b/drivers/firmware/Kconfig > @@ -200,5 +200,6 @@ config HAVE_ARM_SMCCC > source "drivers/firmware/broadcom/Kconfig" > source "drivers/firmware/google/Kconfig" > source "drivers/firmware/efi/Kconfig" > +source "drivers/firmware/tegra/Kconfig" > > endmenu > diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile > index 474bada56fcd..9a4df8171cc4 100644 > --- a/drivers/firmware/Makefile > +++ b/drivers/firmware/Makefile > @@ -24,3 +24,4 @@ obj-y += broadcom/ > obj-$(CONFIG_GOOGLE_FIRMWARE) += google/ > obj-$(CONFIG_EFI) += efi/ > obj-$(CONFIG_UEFI_CPER) += efi/ > +obj-y += tegra/ > diff --git a/drivers/firmware/tegra/Kconfig b/drivers/firmware/tegra/Kconfig > new file mode 100644 > index 000000000000..1fa3e4e136a5 > --- /dev/null > +++ b/drivers/firmware/tegra/Kconfig > @@ -0,0 +1,13 @@ > +menu "Tegra firmware driver" > + > +config TEGRA_IVC > + bool "Tegra IVC protocol" If this driver is not tristate, then why does the driver include the module.h header below? > + depends on ARCH_TEGRA > + help > + IVC (Inter-VM Communication) protocol is part of the IPC > + (Inter Processor Communication) framework on Tegra. It maintains the > + data and the different commuication channels in SysRAM or RAM and > + keeps the content is synchronization between host CPU and remote > + processors. > + > +endmenu > diff --git a/drivers/firmware/tegra/Makefile b/drivers/firmware/tegra/Makefile > new file mode 100644 > index 000000000000..92e2153e8173 > --- /dev/null > +++ b/drivers/firmware/tegra/Makefile > @@ -0,0 +1 @@ > +obj-$(CONFIG_TEGRA_IVC) += ivc.o > diff --git a/drivers/firmware/tegra/ivc.c b/drivers/firmware/tegra/ivc.c > new file mode 100644 > index 000000000000..3e736bb9915a > --- /dev/null > +++ b/drivers/firmware/tegra/ivc.c > @@ -0,0 +1,659 @@ > +/* > + * Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + */ > + > +#include <linux/module.h> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I'm sure it "works" since module.h includes nearly everything else, but that is less than ideal for exactly the same reason. Thanks, Paul. -- > + > +#include <soc/tegra/ivc.h> > + > +#define IVC_ALIGN 64 > + -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
