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SubjectRe: [PATCH] PCI: layerscape: Add the SRIOV support in host side
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On 2019-12-02 10:45, Xiaowei Bao wrote:
> GIC get the map relations of devid and stream id from the msi-map
> property of DTS, our platform add this property in u-boot base on
> the PCIe device in the bus, but if enable the vf device in kernel,
> the vf device msi-map will not set, so the vf device can't work,
> this patch purpose is that manage the stream id and device id map
> relations dynamically in kernel, and make the new PCIe device work
> in kernel.
>
> Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
> ---
> drivers/of/irq.c | 9 +++
> drivers/pci/controller/dwc/pci-layerscape.c | 94
> +++++++++++++++++++++++++++++
> drivers/pci/probe.c | 6 ++
> drivers/pci/remove.c | 6 ++
> 4 files changed, 115 insertions(+)
>
> diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> index a296eaf..791e609 100644
> --- a/drivers/of/irq.c
> +++ b/drivers/of/irq.c
> @@ -576,6 +576,11 @@ void __init of_irq_init(const struct
> of_device_id *matches)
> }
> }
>
> +u32 __weak ls_pcie_streamid_fix(struct device *dev, u32 rid)
> +{
> + return rid;
> +}
> +
> static u32 __of_msi_map_rid(struct device *dev, struct device_node
> **np,
> u32 rid_in)
> {
> @@ -590,6 +595,10 @@ static u32 __of_msi_map_rid(struct device *dev,
> struct device_node **np,
> if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map",
> "msi-map-mask", np, &rid_out))
> break;
> +
> + if (rid_out == rid_in)
> + rid_out = ls_pcie_streamid_fix(parent_dev, rid_in);

Over my dead body. Get your firmware to properly program the LUT
so that it presents the ITS with a reasonable topology. There is
absolutely no way this kind of change makes it into the kernel.

Thanks,

M.
--
Who you jivin' with that Cosmik Debris?

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