Re: [PATCH 2/3] soc: keystone: add QMSS driver

[Kumar Gala]

On Feb 28, 2014, at 5:18 PM, Santosh Shilimkar <santosh.shilimkar@xxxxxx> wrote:

> From: Sandeep Nair <sandeep_n@xxxxxx>
> 
> The QMSS (Queue Manager Sub System) found on Keystone SOCs is one of
> the main hardware sub system which forms the backbone of the Keystone
> Multi-core Navigator. QMSS consist of queue managers, packed-data structure
> processors(PDSP), linking RAM, descriptor pools and infrastructure
> Packet DMA.
> 
> The Queue Manager is a hardware module that is responsible for accelerating
> management of the packet queues. Packets are queued/de-queued by writing or
> reading descriptor address to a particular memory mapped location. The PDSPs
> perform QMSS related functions like accumulation, QoS, or event management.
> Linking RAM registers are used to link the descriptors which are stored in
> descriptor RAM. Descriptor RAM is configurable as internal or external memory.
> 
> The QMSS driver manages the PDSP setups, linking RAM regions,
> queue pool management (allocation, push, pop and notify) and descriptor
> pool management. The specifics on the device tree bindings for
> QMSS can be found in:
>        Documentation/devicetree/bindings/soc/keystone-qmss.txt
> 
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
> Cc: Olof Johansson <olof@xxxxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Grant Likely <grant.likely@xxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Signed-off-by: Sandeep Nair <sandeep_n@xxxxxx>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> ---
> .../devicetree/bindings/soc/keystone-qmss.txt      |  209 +++
> drivers/Kconfig                                    |    2 +
> drivers/Makefile                                   |    3 +
> drivers/soc/Kconfig                                |    2 +
> drivers/soc/Makefile                               |    5 +
> drivers/soc/keystone/Kconfig                       |   15 +
> drivers/soc/keystone/Makefile                      |    5 +
> drivers/soc/keystone/qmss_acc.c                    |  591 ++++++++
> drivers/soc/keystone/qmss_queue.c                  | 1533 ++++++++++++++++++++
> drivers/soc/keystone/qmss_queue.h                  |  236 +++

So this should be drivers/soc/ti, much like we use vendor in drivers/net/ethernet

> include/linux/soc/keystone_qmss.h                  |  390 +++++

include/linux/soc/ti/

> 11 files changed, 2991 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/soc/keystone-qmss.txt
> create mode 100644 drivers/soc/Makefile
> create mode 100644 drivers/soc/keystone/Kconfig
> create mode 100644 drivers/soc/keystone/Makefile
> create mode 100644 drivers/soc/keystone/qmss_acc.c
> create mode 100644 drivers/soc/keystone/qmss_queue.c
> create mode 100644 drivers/soc/keystone/qmss_queue.h
> create mode 100644 include/linux/soc/keystone_qmss.h

[snip]

> diff --git a/drivers/Kconfig b/drivers/Kconfig
> index 37f955f..3220516 100644
> --- a/drivers/Kconfig
> +++ b/drivers/Kconfig
> @@ -146,6 +146,8 @@ source "drivers/remoteproc/Kconfig"
> 
> source "drivers/rpmsg/Kconfig"
> 
> +source "drivers/soc/Kconfig"
> +
> source "drivers/devfreq/Kconfig"
> 
> source "drivers/extcon/Kconfig"
> diff --git a/drivers/Makefile b/drivers/Makefile
> index 0d8e2a4..0c22db8 100644
> --- a/drivers/Makefile
> +++ b/drivers/Makefile
> @@ -146,6 +146,9 @@ obj-$(CONFIG_IOMMU_SUPPORT)	+= iommu/
> obj-$(CONFIG_REMOTEPROC)	+= remoteproc/
> obj-$(CONFIG_RPMSG)		+= rpmsg/
> 
> +# SOC specific drivers
> +obj-y				+= soc/
> +
> # Virtualization drivers
> obj-$(CONFIG_VIRT_DRIVERS)	+= virt/
> obj-$(CONFIG_HYPERV)		+= hv/
> diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
> index 2f9d7d0..59980bd 100644
> --- a/drivers/soc/Kconfig
> +++ b/drivers/soc/Kconfig
> @@ -1,3 +1,5 @@
> menu "SOC specific Drivers"
> 
> +source "drivers/soc/keystone/Kconfig"
> +
> endmenu
> diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
> new file mode 100644
> index 0000000..c5d141e
> --- /dev/null
> +++ b/drivers/soc/Makefile
> @@ -0,0 +1,5 @@
> +#
> +# Makefile for the Linux kernel SOC specific device drivers.
> +#
> +
> +obj-$(CONFIG_ARCH_KEYSTONE)		+= keystone/
> diff --git a/drivers/soc/keystone/Kconfig b/drivers/soc/keystone/Kconfig
> new file mode 100644
> index 0000000..0b3131b
> --- /dev/null
> +++ b/drivers/soc/keystone/Kconfig
> @@ -0,0 +1,15 @@
> +#
> +# TI Keystone Soc drivers
> +#
> +

We should have this be something like:

menuconfig SOC_TI
	bool “TI SoC support”
	

if SOC_TI

> +config KEYSTONE_QMSS
> +	tristate "Keystone Queue Manager Sub System"
> +	depends on ARCH_KEYSTONE
> +	help
> +	  Say y here to support the Keystone Hardware Queue Manager support.
> +	  The Queue Manager is a hardware module that is responsible for
> +	  accelerating management of the packet queues. Packets are queued/
> +	  de-queued by writing/reading descriptor address to a particular
> +	  memory mapped location in the Queue Manager module.
> +
> +	  If unsure, say N.

endif # SOC_TI

[snip]

- k

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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