[U-Boot] [PATCH 4/7 v3] pci/layerscape: add support for LUT

york sun
2016-03-07T22:32:12Z

On 02/26/2016 08:52 AM, Stuart Yoder wrote:
> From: Stuart Yoder <stuart.yoder@nxp.com>
>
> The per-PCI controller LUT (Look-Up-Table) is a 32-entry table
> that maps PCI requester IDs (bus/dev/fun) to a stream ID.
>
> This patch implements infrastructure to enable LUT initialization:
> -define registers offsets
> -add an index to 'struct ls_pcie' to track next available slot in LUT
> -add function to allocate the next available entry index
> -add function to program a LUT entry
>
> Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
> ---
> -v3
> -moved LUT #defines to immap_lsch3.h, made index
> allocator return an int
>
> .../include/asm/arch-fsl-layerscape/immap_lsch3.h | 4 +++
> drivers/pci/pcie_layerscape.c | 29 ++++++++++++++++++++
> 2 files changed, 33 insertions(+)
>
> diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
> index 91f3ce8..d04e336 100644
> --- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
> +++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
> @@ -86,6 +86,10 @@
> #define PCIE_LUT_BASE 0x80000
> #define PCIE_LUT_LCTRL0 0x7F8
> #define PCIE_LUT_DBG 0x7FC
> +#define PCIE_LUT_UDR(n) (0x800 + (n) * 8)
> +#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
> +#define PCIE_LUT_ENABLE (1 << 31)
> +#define PCIE_LUT_ENTRY_COUNT 32
>
> /* Device Configuration */
> #define DCFG_BASE 0x01e00000
> diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
> index bb29222..8b1e6fb 100644
> --- a/drivers/pci/pcie_layerscape.c
> +++ b/drivers/pci/pcie_layerscape.c
> @@ -93,6 +93,7 @@ struct ls_pcie {
> void __iomem *dbi;
> void __iomem *va_cfg0;
> void __iomem *va_cfg1;
> + int next_lut_index;
> struct pci_controller hose;
> };
>
> @@ -482,6 +483,33 @@ static void ls_pcie_setup_ep(struct ls_pcie *pcie, struct ls_pcie_info *info)
> }
> }
>
> +
> +/*
> + * Return next available LUT index.
> + */
> +static int ls_pcie_next_lut_index(struct ls_pcie *pcie)
> +{
> + if (pcie->next_lut_index < PCIE_LUT_ENTRY_COUNT)

This causes compiling error on LS1043 targets. LS1043is lsch2 device. Please
test your patch on all layerscape targets.

York