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 +++ > include/linux/soc/keystone_qmss.h | 390 +++++ > 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 Do you see qmss being able to provide HW support for a qdisc or doing processor to processor communication over something like rpmsg? I ask because I do wondering if we should be looking at a drivers/hwqueue as other vendors have similar hardware. - k -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- 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
