[U-Boot] [PATCH 3/6] pcie-layerscape: Define stream-ids for Layerscape Chassis-2

[Diana Madalina Craciun]

On 2/24/2017 10:02 AM, Bharat Bhushan wrote:
> Layerscape Chassis-2 have PCIe device, some platform devices and
> DPAA1 devices which will use stream-ids for iommu level isolation as
> they lies behind SMMU.
>
> This patch defines the stream-ids for Chassis-2 devices.
> stream-ids for DPAA1 are reserved for future use.
>
> Signed-off-by: Bharat Bhushan <Bharat.Bhushan at nxp.com>
> ---
>  .../asm/arch-fsl-layerscape/stream_id_lsch2.h      | 60 ++++++++++++++++++++++
>  include/configs/ls1043a_common.h                   |  1 +
>  2 files changed, 61 insertions(+)
>  create mode 100644 arch/arm/include/asm/arch-fsl-layerscape/stream_id_lsch2.h
>
> diff --git a/arch/arm/include/asm/arch-fsl-layerscape/stream_id_lsch2.h b/arch/arm/include/asm/arch-fsl-layerscape/stream_id_lsch2.h
> new file mode 100644
> index 0000000..d41dd2e
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-fsl-layerscape/stream_id_lsch2.h
> @@ -0,0 +1,60 @@
> +/*
> + * Copyright 2017 NXP Semiconductor, Inc.
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + *
> + */
> +#ifndef __FSL_STREAM_ID_H
> +#define __FSL_STREAM_ID_H
> +
> +/*
> + * Stream IDs on Chassis-2 (for example ls1043a, ls1046a, ls1012) 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 DPAA1 devices.
> + *
> + * This partitioning can be customized in this file depending
> + * on the specific hardware config:
> + *
> + *  -non-PCI legacy, platform devices (USB, SDHC, SATA, DMA, QE etc)
> + *     -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)

Only msi-map? Don't we need an iommu-map as well?

> + *
> + *  -DPAA1
> + *     - Stream ids for DPAA1 use are reserved for future usecase.
> + *
> + */
> +
> +
> +#define FSL_INVALID_STREAM_ID		0
> +
> +/* legacy devices */
> +#define FSL_USB1_STREAM_ID		1
> +#define FSL_USB2_STREAM_ID		2
> +#define FSL_USB3_STREAM_ID		3
> +#define FSL_SDHC_STREAM_ID		4
> +#define FSL_SATA_STREAM_ID		5
> +#define FSL_QE_STREAM_ID		6
> +#define FSL_QDMA_STREAM_ID		7
> +#define FSL_EDMA_STREAM_ID		8
> +#define FSL_ETR_STREAM_ID		9
> +
> +/* PCI - programmed in PEXn_LUT */
> +#define FSL_PEX_STREAM_ID_START		11
> +#define FSL_PEX_STREAM_ID_END		26
> +
> +/* DPAA1 - Stream-ID that can be programmed in DPAA1 h/w */
> +#define FSL_DPAA1_STREAM_ID_START	27
> +#define FSL_DPAA1_STREAM_ID_END		63
> +
> +#endif
> diff --git a/include/configs/ls1043a_common.h b/include/configs/ls1043a_common.h
> index c4b05e0..5f84497 100644
> --- a/include/configs/ls1043a_common.h
> +++ b/include/configs/ls1043a_common.h
> @@ -13,6 +13,7 @@
>  #define CONFIG_MP
>  #define CONFIG_GICV2
>  
> +#include <asm/arch/stream_id_lsch2.h>
>  #include <asm/arch/config.h>
>  
>  /* Link Definitions */

Diana