From: Stuart Yoder stuart.yoder@nxp.com

-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 --- -v5: no change

.../asm/arch-fsl-layerscape/ls2080a_stream_id.h | 55 ++++++++++++-------- 1 file changed, 34 insertions(+), 21 deletions(-)

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/ls2080a_stream_id.h b/arch/arm/include/asm/arch-fsl-layerscape/ls2080a_stream_id.h index 954104b..ee28323 100644 --- a/arch/arm/include/asm/arch-fsl-layerscape/ls2080a_stream_id.h +++ b/arch/arm/include/asm/arch-fsl-layerscape/ls2080a_stream_id.h @@ -7,28 +7,48 @@ #ifndef __FSL_STREAM_ID_H #define __FSL_STREAM_ID_H

-/* Stream IDs on ls2080a devices are not hardwired and are +/* + * Stream IDs on ls2080a devices are not hardwired and are * programmed by sw. There are a limited number of stream IDs * available, and the partitioning of them is scenario dependent. * This header defines the partitioning between legacy, PCI, * and DPAA2 devices. * - * This partitiong can be customized in this file depending - * on the specific hardware config-- e.g. perhaps not all - * PEX controllers are in use. + * This partitioning can be customized in this file depending + * on the specific hardware config: + * + * -non-PCI legacy, platform devices (USB, SD/MMC, SATA, DMA) + * -all legacy devices get a unique stream ID assigned and programmed in + * their AMQR registers by u-boot + * + * -PCIe + * -there is a range of stream IDs set aside for PCI in this + * file. U-boot will scan the PCI bus and for each device discovered: + * -allocate a streamID + * -set a PEXn LUT table entry mapping 'requester ID' to 'stream ID' + * -set a msi-map entry in the PEXn controller node in the + * device tree (see Documentation/devicetree/bindings/pci/pci-msi.txt + * for more info on the msi-map definition) * - * On LS2080 stream IDs are programmed in AMQ registers (32-bits) for + * -DPAA2 + * -u-boot will allocate a range of stream IDs to be used by the Management + * Complex for containers and will set these values in the MC DPC image. + * -the MC is responsible for allocating and setting up 'isolation context + * IDs (ICIDs) based on the allocated stream IDs for all DPAA2 devices. + * + * On ls2080a SoCs stream IDs are programmed in AMQ registers (32-bits) for * each of the different bus masters. The relationship between * the AMQ registers and stream IDs is defined in the table below: * AMQ bit streamID bit * --------------------------- - * PL[18] 9 - * BMT[17] 8 - * VA[16] 7 - * [15] - - * ICID[14:7] - - * ICID[6:0] 6-0 + * PL[18] 9 // privilege bit + * BMT[17] 8 // bypass translation + * VA[16] 7 // reserved + * [15] - // unused + * ICID[14:7] - // unused + * ICID[6:0] 6-0 // isolation context id * ---------------------------- + * */

#define AMQ_PL_MASK (0x1 << 18) /* priviledge bit */ @@ -46,16 +66,9 @@ #define FSL_SATA2_STREAM_ID 5 #define FSL_DMA_STREAM_ID 6

-/* PCI - programmed in PEXn_LUT by OS */ -/* 4 IDs per controller */ -#define FSL_PEX1_STREAM_ID_START 7 -#define FSL_PEX1_STREAM_ID_END 10 -#define FSL_PEX2_STREAM_ID_START 11 -#define FSL_PEX2_STREAM_ID_END 14 -#define FSL_PEX3_STREAM_ID_START 15 -#define FSL_PEX3_STREAM_ID_END 18 -#define FSL_PEX4_STREAM_ID_START 19 -#define FSL_PEX4_STREAM_ID_END 22 +/* PCI - programmed in PEXn_LUT */ +#define FSL_PEX_STREAM_ID_START 7 +#define FSL_PEX_STREAM_ID_END 22

/* DPAA2 - set in MC DPC and alloced by MC */ #define FSL_DPAA2_STREAM_ID_START 23