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029a407dae
Update comments around how stream IDs are partitioned. Stream IDs allocated to PCI are no longer divided up by controller, but are instead a contiguous range Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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*/
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#ifndef __FSL_STREAM_ID_H
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#define __FSL_STREAM_ID_H
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/*
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* Stream IDs on ls2080a devices are not hardwired and are
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* programmed by sw. There are a limited number of stream IDs
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* available, and the partitioning of them is scenario dependent.
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* This header defines the partitioning between legacy, PCI,
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* and DPAA2 devices.
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*
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* This partitioning can be customized in this file depending
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* on the specific hardware config:
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*
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* -non-PCI legacy, platform devices (USB, SD/MMC, SATA, DMA)
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* -all legacy devices get a unique stream ID assigned and programmed in
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* their AMQR registers by u-boot
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*
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* -PCIe
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* -there is a range of stream IDs set aside for PCI in this
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* file. U-boot will scan the PCI bus and for each device discovered:
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* -allocate a streamID
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* -set a PEXn LUT table entry mapping 'requester ID' to 'stream ID'
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* -set a msi-map entry in the PEXn controller node in the
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* device tree (see Documentation/devicetree/bindings/pci/pci-msi.txt
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* for more info on the msi-map definition)
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*
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* -DPAA2
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* -u-boot will allocate a range of stream IDs to be used by the Management
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* Complex for containers and will set these values in the MC DPC image.
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* -the MC is responsible for allocating and setting up 'isolation context
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* IDs (ICIDs) based on the allocated stream IDs for all DPAA2 devices.
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*
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* On ls2080a SoCs stream IDs are programmed in AMQ registers (32-bits) for
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* each of the different bus masters. The relationship between
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* the AMQ registers and stream IDs is defined in the table below:
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* AMQ bit streamID bit
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* ---------------------------
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* PL[18] 9 // privilege bit
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* BMT[17] 8 // bypass translation
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* VA[16] 7 // reserved
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* [15] - // unused
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* ICID[14:7] - // unused
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* ICID[6:0] 6-0 // isolation context id
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* ----------------------------
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*
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*/
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#define AMQ_PL_MASK (0x1 << 18) /* priviledge bit */
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#define AMQ_BMT_MASK (0x1 << 17) /* bypass bit */
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#define FSL_INVALID_STREAM_ID 0
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#define FSL_BYPASS_AMQ (AMQ_PL_MASK | AMQ_BMT_MASK)
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/* legacy devices */
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#define FSL_USB1_STREAM_ID 1
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#define FSL_USB2_STREAM_ID 2
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#define FSL_SDMMC_STREAM_ID 3
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#define FSL_SATA1_STREAM_ID 4
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#define FSL_SATA2_STREAM_ID 5
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#define FSL_DMA_STREAM_ID 6
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/* PCI - programmed in PEXn_LUT */
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#define FSL_PEX_STREAM_ID_START 7
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#define FSL_PEX_STREAM_ID_END 22
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/* DPAA2 - set in MC DPC and alloced by MC */
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#define FSL_DPAA2_STREAM_ID_START 23
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#define FSL_DPAA2_STREAM_ID_END 63
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#endif
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