On Thu, Oct 12, 2017 at 10:11:08AM +0530, Pankaj Dubey wrote:
> IATU unroll feature can be enabled in EP mode as well, so we need to
> have this check in pcie-designware-ep.c, so instead of making this
> function as static in pcie-desigware-host.c, let's move this in
> pcie-designware.c so that both pcie-designware-host.c and
> pcie-designware-ep.c can use it.
>
> Signed-off-by: Pankaj Dubey <pankaj.du...@samsung.com>
This is fine with me but I'm looking for an ack from Jingoo and/or Joao.
> ---
> drivers/pci/dwc/pcie-designware-ep.c | 4 ++++
> drivers/pci/dwc/pcie-designware-host.c | 11 -----------
> drivers/pci/dwc/pcie-designware.c | 11 +++++++++++
> drivers/pci/dwc/pcie-designware.h | 1 +
> 4 files changed, 16 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/pci/dwc/pcie-designware-ep.c
> b/drivers/pci/dwc/pcie-designware-ep.c
> index d53d5f1..64803a9 100644
> --- a/drivers/pci/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/dwc/pcie-designware-ep.c
> @@ -314,6 +314,10 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
> if (ep->ops->ep_init)
> ep->ops->ep_init(ep);
>
> + pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
> + dev_dbg(dev, "iATU unroll: %s\n",
> + pci->iatu_unroll_enabled ? "enabled" : "disabled");
> +
> epc = devm_pci_epc_create(dev, &epc_ops);
> if (IS_ERR(epc)) {
> dev_err(dev, "failed to create epc device\n");
> diff --git a/drivers/pci/dwc/pcie-designware-host.c
> b/drivers/pci/dwc/pcie-designware-host.c
> index 81e2157..d3f579e 100644
> --- a/drivers/pci/dwc/pcie-designware-host.c
> +++ b/drivers/pci/dwc/pcie-designware-host.c
> @@ -574,17 +574,6 @@ static struct pci_ops dw_pcie_ops = {
> .write = dw_pcie_wr_conf,
> };
>
> -static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
> -{
> - u32 val;
> -
> - val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
> - if (val == 0xffffffff)
> - return 1;
> -
> - return 0;
> -}
> -
> void dw_pcie_setup_rc(struct pcie_port *pp)
> {
> u32 val;
> diff --git a/drivers/pci/dwc/pcie-designware.c
> b/drivers/pci/dwc/pcie-designware.c
> index 88abddd..f15da90 100644
> --- a/drivers/pci/dwc/pcie-designware.c
> +++ b/drivers/pci/dwc/pcie-designware.c
> @@ -92,6 +92,17 @@ void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem
> *base, u32 reg,
> dev_err(pci->dev, "write DBI address failed\n");
> }
>
> +u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
I know this is just moved verbatim, but it's more conventional to simply
return an int (or possibly bool) for a predicate like this. There's really
no point in going out of your way to specify "u8" for the return type.
> +{
> + u32 val;
> +
> + val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
> + if (val == 0xffffffff)
> + return 1;
> +
> + return 0;
> +}
> +
> static u32 dw_pcie_readl_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg)
> {
> u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
> diff --git a/drivers/pci/dwc/pcie-designware.h
> b/drivers/pci/dwc/pcie-designware.h
> index e5d9d77..8d6829c 100644
> --- a/drivers/pci/dwc/pcie-designware.h
> +++ b/drivers/pci/dwc/pcie-designware.h
> @@ -242,6 +242,7 @@ int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int
> index, int bar,
> void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
> enum dw_pcie_region_type type);
> void dw_pcie_setup(struct dw_pcie *pci);
> +u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci);
>
> static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
> {
> --
> 2.7.4
>
