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| -rw-r--r-- | Documentation/devicetree/bindings/soc/ti/keystone-navigator-qmss.txt | 232 |
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diff --git a/Documentation/devicetree/bindings/soc/ti/keystone-navigator-qmss.txt b/Documentation/devicetree/bindings/soc/ti/keystone-navigator-qmss.txt new file mode 100644 index 000000000000..d8e8cdb733f9 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/ti/keystone-navigator-qmss.txt @@ -0,0 +1,232 @@ +* Texas Instruments Keystone Navigator Queue Management SubSystem driver + +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. + + +Required properties: +- compatible : Must be "ti,keystone-navigator-qmss"; +- clocks : phandle to the reference clock for this device. +- queue-range : <start number> total range of queue numbers for the device. +- linkram0 : <address size> for internal link ram, where size is the total + link ram entries. +- linkram1 : <address size> for external link ram, where size is the total + external link ram entries. If the address is specified as "0" + driver will allocate memory. +- qmgrs : child node describing the individual queue managers on the + SoC. On keystone 1 devices there should be only one node. + On keystone 2 devices there can be more than 1 node. + -- managed-queues : the actual queues managed by each queue manager + instance, specified as <"base queue #" "# of queues">. + -- reg : Address and size of the register set for the device. + Register regions should be specified in the following + order + - Queue Peek region. + - Queue status RAM. + - Queue configuration region. + - Descriptor memory setup region. + - Queue Management/Queue Proxy region for queue Push. + - Queue Management/Queue Proxy region for queue Pop. +- queue-pools : child node classifying the queue ranges into pools. + Queue ranges are grouped into 3 type of pools: + - qpend : pool of qpend(interruptible) queues + - general-purpose : pool of general queues, primarly used + as free descriptor queues or the + transmit DMA queues. + - accumulator : pool of queues on PDSP accumulator channel + Each range can have the following properties: + -- qrange : number of queues to use per queue range, specified as + <"base queue #" "# of queues">. + -- interrupts : Optional property to specify the interrupt mapping + for interruptible queues. The driver additionaly sets + the interrupt affinity hint based on the cpu mask. + -- qalloc-by-id : Optional property to specify that the queues in this + range can only be allocated by queue id. + -- accumulator : Accumulator channel specification. Any of the PDSPs in + QMSS can be loaded with the accumulator firmware. The + accumulator firmware’s job is to poll a select number of + queues looking for descriptors that have been pushed + into them. Descriptors are popped from the queue and + placed in a buffer provided by the host. When the list + becomes full or a programmed time period expires, the + accumulator triggers an interrupt to the host to read + the buffer for descriptor information. This firmware + comes in 16, 32, and 48 channel builds. Each of these + channels can be configured to monitor 32 contiguous + queues. Accumulator channel property is specified as: + <pdsp-id, channel, entries, pacing mode, latency> + pdsp-id : QMSS PDSP running accumulator firmware + on which the channel has to be + configured + channel : Accumulator channel number + entries : Size of the accumulator descriptor list + pacing mode : Interrupt pacing mode + 0 : None, i.e interrupt on list full only + 1 : Time delay since last interrupt + 2 : Time delay since first new packet + 3 : Time delay since last new packet + latency : time to delay the interrupt, specified + in microseconds. + -- multi-queue : Optional property to specify that the channel has to + monitor upto 32 queues starting at the base queue #. +- descriptor-regions : child node describing the memory regions for keystone + navigator packet DMA descriptors. The memory for + descriptors will be allocated by the driver. + -- id : region number in QMSS. + -- region-spec : specifies the number of descriptors in the + region, specified as + <"# of descriptors" "descriptor size">. + -- link-index : start index, i.e. index of the first + descriptor in the region. + +Optional properties: +- dma-coherent : Present if DMA operations are coherent. +- pdsps : child node describing the PDSP configuration. + -- firmware : firmware to be loaded on the PDSP. + -- id : the qmss pdsp that will run the firmware. + -- reg : Address and size of the register set for the PDSP. + Register regions should be specified in the following + order + - PDSP internal RAM region. + - PDSP control/status region registers. + - QMSS interrupt distributor registers. + - PDSP command interface region. + +Example: + +qmss: qmss@2a40000 { + compatible = "ti,keystone-qmss"; + dma-coherent; + #address-cells = <1>; + #size-cells = <1>; + clocks = <&chipclk13>; + ranges; + queue-range = <0 0x4000>; + linkram0 = <0x100000 0x8000>; + linkram1 = <0x0 0x10000>; + + qmgrs { + #address-cells = <1>; + #size-cells = <1>; + ranges; + qmgr0 { + managed-queues = <0 0x2000>; + reg = <0x2a40000 0x20000>, + <0x2a06000 0x400>, + <0x2a02000 0x1000>, + <0x2a03000 0x1000>, + <0x23a80000 0x20000>, + <0x2a80000 0x20000>; + }; + + qmgr1 { + managed-queues = <0x2000 0x2000>; + reg = <0x2a60000 0x20000>, + <0x2a06400 0x400>, + <0x2a04000 0x1000>, + <0x2a05000 0x1000>, + <0x23aa0000 0x20000>, + <0x2aa0000 0x20000>; + }; + }; + queue-pools { + qpend { + qpend-0 { + qrange = <658 8>; + interrupts =<0 40 0xf04 0 41 0xf04 0 42 0xf04 + 0 43 0xf04 0 44 0xf04 0 45 0xf04 + 0 46 0xf04 0 47 0xf04>; + }; + qpend-1 { + qrange = <8704 16>; + interrupts = <0 48 0xf04 0 49 0xf04 0 50 0xf04 + 0 51 0xf04 0 52 0xf04 0 53 0xf04 + 0 54 0xf04 0 55 0xf04 0 56 0xf04 + 0 57 0xf04 0 58 0xf04 0 59 0xf04 + 0 60 0xf04 0 61 0xf04 0 62 0xf04 + 0 63 0xf04>; + qalloc-by-id; + }; + qpend-2 { + qrange = <8720 16>; + interrupts = <0 64 0xf04 0 65 0xf04 0 66 0xf04 + 0 59 0xf04 0 68 0xf04 0 69 0xf04 + 0 70 0xf04 0 71 0xf04 0 72 0xf04 + 0 73 0xf04 0 74 0xf04 0 75 0xf04 + 0 76 0xf04 0 77 0xf04 0 78 0xf04 + 0 79 0xf04>; + }; + }; + general-purpose { + gp-0 { + qrange = <4000 64>; + }; + netcp-tx { + qrange = <640 9>; + qalloc-by-id; + }; + }; + accumulator { + acc-0 { + qrange = <128 32>; + accumulator = <0 36 16 2 50>; + interrupts = <0 215 0xf01>; + multi-queue; + qalloc-by-id; + }; + acc-1 { + qrange = <160 32>; + accumulator = <0 37 16 2 50>; + interrupts = <0 216 0xf01>; + multi-queue; + }; + acc-2 { + qrange = <192 32>; + accumulator = <0 38 16 2 50>; + interrupts = <0 217 0xf01>; + multi-queue; + }; + acc-3 { + qrange = <224 32>; + accumulator = <0 39 16 2 50>; + interrupts = <0 218 0xf01>; + multi-queue; + }; + }; + }; + descriptor-regions { + #address-cells = <1>; + #size-cells = <1>; + ranges; + region-12 { + id = <12>; + region-spec = <8192 128>; /* num_desc desc_size */ + link-index = <0x4000>; + }; + }; + pdsps { + #address-cells = <1>; + #size-cells = <1>; + ranges; + pdsp0@0x2a10000 { + firmware = "keystone/qmss_pdsp_acc48_k2_le_1_0_0_8.fw"; + reg = <0x2a10000 0x1000>, + <0x2a0f000 0x100>, + <0x2a0c000 0x3c8>, + <0x2a20000 0x4000>; + id = <0>; + }; + }; +}; /* qmss */ |