1 ==============================================
2 Texas Instruments Keystone Navigator Queue Man
3 ==============================================
4
5 Driver source code path
6 drivers/soc/ti/knav_qmss.c
7 drivers/soc/ti/knav_qmss_acc.c
8
9 The QMSS (Queue Manager Sub System) found on K
10 the main hardware sub system which forms the b
11 multi-core Navigator. QMSS consist of queue ma
12 processors(PDSP), linking RAM, descriptor pool
13 Packet DMA.
14 The Queue Manager is a hardware module that is
15 management of the packet queues. Packets are q
16 reading descriptor address to a particular mem
17 perform QMSS related functions like accumulati
18 Linking RAM registers are used to link the des
19 descriptor RAM. Descriptor RAM is configurable
20 The QMSS driver manages the PDSP setups, linki
21 queue pool management (allocation, push, pop a
22 pool management.
23
24 knav qmss driver provides a set of APIs to dri
25 allocate descriptor pools, map the descriptors
26 details of the available APIs, please refers t
27
28 DT documentation is available at
29 Documentation/devicetree/bindings/soc/ti/keyst
30
31 Accumulator QMSS queues using PDSP firmware
32 ============================================
33 The QMSS PDSP firmware support accumulator cha
34 queue or multiple contiguous queues. drivers/s
35 driver that interface with the accumulator PDS
36 accumulator channels defined in DTS (example i
37 1 or 32 queues per channel. More description o
38 CPPI/QMSS Low Level Driver document (docs/CPPI
39
40 git://git.ti.com/keystone-rtos/qmss-ll
41
42 k2_qmss_pdsp_acc48_k2_le_1_0_0_9.bin firmware
43 channels. This firmware is available under ti-
44 firmware.git at
45
46 git://git.kernel.org/pub/scm/linux/kernel/g
47
48 To use copy the firmware image to lib/firmware
49 ubifs file system and provide a sym link to k2
50 in the file system and boot up the kernel. Use
51
52 "firmware file ks2_qmss_pdsp_acc48.bin downlo
53
54 in the boot up log if loading of firmware to P
55
56 Use of accumulated queues requires the firmwar
57 file system. The driver doesn't acc queues to
58 PDSP is not running in the SoC. The API call f
59 request to an acc queue and PDSP is not runnin
60 to file system before using these queue types.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.