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SubjectRe: [PATCH v4 4/7] PCI: dwc: all: Modify dbi accessors to take dbi_base as argument
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On 03/13/2017 02:43 PM, Kishon Vijay Abraham I wrote:
> dwc has 2 dbi address space labeled dbics and dbics2. The existing
> helper to access dbi address space can access only dbics. However
> dbics2 has to be accessed for programming the BAR registers in the
> case of EP mode. This is in preparation for adding EP mode support
> to dwc driver.
>
> Cc: Jingoo Han <jingoohan1@gmail.com>
> Cc: Joao Pinto <Joao.Pinto@synopsys.com>
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
> drivers/pci/dwc/pci-exynos.c | 10 ++++++----
> drivers/pci/dwc/pcie-designware.c | 13 +++++++------
> drivers/pci/dwc/pcie-designware.h | 20 ++++++++++++++++----
> 3 files changed, 29 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c
> index 993b650ef275..a0d40f74b88d 100644
> --- a/drivers/pci/dwc/pci-exynos.c
> +++ b/drivers/pci/dwc/pci-exynos.c
> @@ -521,23 +521,25 @@ static void exynos_pcie_enable_interrupts(struct exynos_pcie *ep)
> exynos_pcie_msi_init(ep);
> }
>
> -static u32 exynos_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
> +static u32 exynos_pcie_readl_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg)
> {
> struct exynos_pcie *ep = to_exynos_pcie(pci);
> u32 val;
>
> exynos_pcie_sideband_dbi_r_mode(ep, true);
> - val = readl(pci->dbi_base + reg);
> + val = readl(base + reg);
> exynos_pcie_sideband_dbi_r_mode(ep, false);
> return val;
> }
>
> -static void exynos_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
> +static void exynos_pcie_writel_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, u32 val)
> {
> struct exynos_pcie *ep = to_exynos_pcie(pci);
>
> exynos_pcie_sideband_dbi_w_mode(ep, true);
> - writel(val, pci->dbi_base + reg);
> + writel(val, base + reg);
> exynos_pcie_sideband_dbi_w_mode(ep, false);
> }
>
> diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
> index 3eaf3ccdc118..ea403e2240cf 100644
> --- a/drivers/pci/dwc/pcie-designware.c
> +++ b/drivers/pci/dwc/pcie-designware.c
> @@ -61,20 +61,21 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
> return PCIBIOS_SUCCESSFUL;
> }
>
> -u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
> +u32 __dw_pcie_readl_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg)
> {
> if (pci->ops->readl_dbi)
> - return pci->ops->readl_dbi(pci, reg);
> + return pci->ops->readl_dbi(pci, base, reg);
>
> - return readl(pci->dbi_base + reg);
> + return readl(base + reg);
> }
>
> -void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
> +void __dw_pcie_writel_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
> + u32 val)
> {
> if (pci->ops->writel_dbi)
> - pci->ops->writel_dbi(pci, reg, val);
> + pci->ops->writel_dbi(pci, base, reg, val);
> else
> - writel(val, pci->dbi_base + reg);
> + writel(val, base + reg);
> }
>
> static u32 dw_pcie_readl_unroll(struct dw_pcie *pci, u32 index, u32 reg)
> diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
> index 8f3dcb2b099b..e97fc4ce7d49 100644
> --- a/drivers/pci/dwc/pcie-designware.h
> +++ b/drivers/pci/dwc/pcie-designware.h
> @@ -144,8 +144,9 @@ struct pcie_port {
>
> struct dw_pcie_ops {
> u64 (*cpu_addr_fixup)(u64 cpu_addr);
> - u32 (*readl_dbi)(struct dw_pcie *pcie, u32 reg);
> - void (*writel_dbi)(struct dw_pcie *pcie, u32 reg, u32 val);
> + u32 (*readl_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg);
> + void (*writel_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
> + u32 val);
> int (*link_up)(struct dw_pcie *pcie);
> };
>
> @@ -163,8 +164,9 @@ struct dw_pcie {
> int dw_pcie_read(void __iomem *addr, int size, u32 *val);
> int dw_pcie_write(void __iomem *addr, int size, u32 val);
>
> -u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
> -void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
> +u32 __dw_pcie_readl_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg);
> +void __dw_pcie_writel_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
> + u32 val);
> int dw_pcie_link_up(struct dw_pcie *pci);
> int dw_pcie_wait_for_link(struct dw_pcie *pci);
> void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
> @@ -172,6 +174,16 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
> u32 size);
> void dw_pcie_setup(struct dw_pcie *pci);
>
> +static inline dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)

Add void as return type, then you can add:

Acked-by: Niklas Cassel <niklas.cassel@axis.com>

> +{
> + __dw_pcie_writel_dbi(pci, pci->dbi_base, reg, val);
> +}
> +
> +static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
> +{
> + return __dw_pcie_readl_dbi(pci, pci->dbi_base, reg);
> +}
> +
> #ifdef CONFIG_PCIE_DW_HOST
> irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
> void dw_pcie_msi_init(struct pcie_port *pp);

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