k3-pktdma.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 # Copyright (C) 2020 Texas Instruments Incorporated
    3 # Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
    4 %YAML 1.2
    5 ---
    6 $id: http://devicetree.org/schemas/dma/ti/k3-pktdma.yaml#
    7 $schema: http://devicetree.org/meta-schemas/core.yaml#
    8 
    9 title: Texas Instruments K3 DMSS PKTDMA Device Tree Bindings
   10 
   11 maintainers:
   12   - Peter Ujfalusi <peter.ujfalusi@gmail.com>
   13 
   14 description: |
   15   The Packet DMA (PKTDMA) is intended to perform similar functions as the packet
   16   mode channels of K3 UDMA-P.
   17   PKTDMA only includes Split channels to service PSI-L based peripherals.
   18 
   19   The peripherals can be PSI-L native or legacy, non PSI-L native peripherals
   20   with PDMAs. PDMA is tasked to act as a bridge between the PSI-L fabric and the
   21   legacy peripheral.
   22 
   23   PDMAs can be configured via PKTDMA split channel's peer registers to match
   24   with the configuration of the legacy peripheral.
   25 
   26 allOf:
   27   - $ref: /schemas/dma/dma-controller.yaml#
   28   - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
   29 
   30 properties:
   31   compatible:
   32     const: ti,am64-dmss-pktdma
   33 
   34   "#dma-cells":
   35     const: 2
   36     description: |
   37       The first cell is the PSI-L  thread ID of the remote (to PKTDMA) end.
   38       Valid ranges for thread ID depends on the data movement direction:
   39       for source thread IDs (rx): 0 - 0x7fff
   40       for destination thread IDs (tx): 0x8000 - 0xffff
   41 
   42       Please refer to the device documentation for the PSI-L thread map and also
   43       the PSI-L peripheral chapter for the correct thread ID.
   44 
   45       The second cell is the ASEL value for the channel
   46 
   47   reg:
   48     maxItems: 4
   49 
   50   reg-names:
   51     items:
   52       - const: gcfg
   53       - const: rchanrt
   54       - const: tchanrt
   55       - const: ringrt
   56 
   57   msi-parent: true
   58 
   59   ti,sci-rm-range-tchan:
   60     $ref: /schemas/types.yaml#/definitions/uint32-array
   61     description: |
   62       Array of PKTDMA split tx channel resource subtypes for resource allocation
   63       for this host
   64     minItems: 1
   65     # Should be enough
   66     maxItems: 255
   67     items:
   68       maximum: 0x3f
   69 
   70   ti,sci-rm-range-tflow:
   71     $ref: /schemas/types.yaml#/definitions/uint32-array
   72     description: |
   73       Array of PKTDMA split tx flow resource subtypes for resource allocation
   74       for this host
   75     minItems: 1
   76     # Should be enough
   77     maxItems: 255
   78     items:
   79       maximum: 0x3f
   80 
   81   ti,sci-rm-range-rchan:
   82     $ref: /schemas/types.yaml#/definitions/uint32-array
   83     description: |
   84       Array of PKTDMA split rx channel resource subtypes for resource allocation
   85       for this host
   86     minItems: 1
   87     # Should be enough
   88     maxItems: 255
   89     items:
   90       maximum: 0x3f
   91 
   92   ti,sci-rm-range-rflow:
   93     $ref: /schemas/types.yaml#/definitions/uint32-array
   94     description: |
   95       Array of PKTDMA split rx flow resource subtypes for resource allocation
   96       for this host
   97     minItems: 1
   98     # Should be enough
   99     maxItems: 255
  100     items:
  101       maximum: 0x3f
  102 
  103 required:
  104   - compatible
  105   - "#dma-cells"
  106   - reg
  107   - reg-names
  108   - msi-parent
  109   - ti,sci
  110   - ti,sci-dev-id
  111   - ti,sci-rm-range-tchan
  112   - ti,sci-rm-range-tflow
  113   - ti,sci-rm-range-rchan
  114   - ti,sci-rm-range-rflow
  115 
  116 unevaluatedProperties: false
  117 
  118 examples:
  119   - |+
  120     cbass_main {
  121         #address-cells = <2>;
  122         #size-cells = <2>;
  123 
  124         main_dmss {
  125             compatible = "simple-mfd";
  126             #address-cells = <2>;
  127             #size-cells = <2>;
  128             dma-ranges;
  129             ranges;
  130 
  131             ti,sci-dev-id = <25>;
  132 
  133             main_pktdma: dma-controller@485c0000 {
  134                 compatible = "ti,am64-dmss-pktdma";
  135 
  136                 reg = <0x0 0x485c0000 0x0 0x100>,
  137                       <0x0 0x4a800000 0x0 0x20000>,
  138                       <0x0 0x4aa00000 0x0 0x40000>,
  139                       <0x0 0x4b800000 0x0 0x400000>;
  140                 reg-names = "gcfg", "rchanrt", "tchanrt", "ringrt";
  141                 msi-parent = <&inta_main_dmss>;
  142                 #dma-cells = <2>;
  143 
  144                 ti,sci = <&dmsc>;
  145                 ti,sci-dev-id = <30>;
  146 
  147                 ti,sci-rm-range-tchan = <0x23>, /* UNMAPPED_TX_CHAN */
  148                                         <0x24>, /* CPSW_TX_CHAN */
  149                                         <0x25>, /* SAUL_TX_0_CHAN */
  150                                         <0x26>, /* SAUL_TX_1_CHAN */
  151                                         <0x27>, /* ICSSG_0_TX_CHAN */
  152                                         <0x28>; /* ICSSG_1_TX_CHAN */
  153                 ti,sci-rm-range-tflow = <0x10>, /* RING_UNMAPPED_TX_CHAN */
  154                                         <0x11>, /* RING_CPSW_TX_CHAN */
  155                                         <0x12>, /* RING_SAUL_TX_0_CHAN */
  156                                         <0x13>, /* RING_SAUL_TX_1_CHAN */
  157                                         <0x14>, /* RING_ICSSG_0_TX_CHAN */
  158                                         <0x15>; /* RING_ICSSG_1_TX_CHAN */
  159                 ti,sci-rm-range-rchan = <0x29>, /* UNMAPPED_RX_CHAN */
  160                                         <0x2b>, /* CPSW_RX_CHAN */
  161                                         <0x2d>, /* SAUL_RX_0_CHAN */
  162                                         <0x2f>, /* SAUL_RX_1_CHAN */
  163                                         <0x31>, /* SAUL_RX_2_CHAN */
  164                                         <0x33>, /* SAUL_RX_3_CHAN */
  165                                         <0x35>, /* ICSSG_0_RX_CHAN */
  166                                         <0x37>; /* ICSSG_1_RX_CHAN */
  167                 ti,sci-rm-range-rflow = <0x2a>, /* FLOW_UNMAPPED_RX_CHAN */
  168                                         <0x2c>, /* FLOW_CPSW_RX_CHAN */
  169                                         <0x2e>, /* FLOW_SAUL_RX_0/1_CHAN */
  170                                         <0x32>, /* FLOW_SAUL_RX_2/3_CHAN */
  171                                         <0x36>, /* FLOW_ICSSG_0_RX_CHAN */
  172                                         <0x38>; /* FLOW_ICSSG_1_RX_CHAN */
  173             };
  174         };
  175     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/dma/ti/k3-pktdma.yaml

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sys/contrib/device-tree/Bindings/dma/ti/k3-pktdma.yaml