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1* Texas Instruments Keystone Navigator Queue Management SubSystem driver
2
3Driver source code path
4 drivers/soc/ti/knav_qmss.c
5 drivers/soc/ti/knav_qmss_acc.c
6
7The QMSS (Queue Manager Sub System) found on Keystone SOCs is one of
8the main hardware sub system which forms the backbone of the Keystone
9multi-core Navigator. QMSS consist of queue managers, packed-data structure
10processors(PDSP), linking RAM, descriptor pools and infrastructure
11Packet DMA.
12The Queue Manager is a hardware module that is responsible for accelerating
13management of the packet queues. Packets are queued/de-queued by writing or
14reading descriptor address to a particular memory mapped location. The PDSPs
15perform QMSS related functions like accumulation, QoS, or event management.
16Linking RAM registers are used to link the descriptors which are stored in
17descriptor RAM. Descriptor RAM is configurable as internal or external memory.
18The QMSS driver manages the PDSP setups, linking RAM regions,
19queue pool management (allocation, push, pop and notify) and descriptor
20pool management.
21
22knav qmss driver provides a set of APIs to drivers to open/close qmss queues,
23allocate descriptor pools, map the descriptors, push/pop to queues etc. For
24details of the available APIs, please refers to include/linux/soc/ti/knav_qmss.h