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Date: Thu, 2 May 2019 15:51:46 +0100
From: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To: Vidya Sagar <vidyas@...dia.com>
Cc: jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
bhelgaas@...gle.com, Jisheng.Zhang@...aptics.com,
thierry.reding@...il.com, linux-pci@...r.kernel.org,
linux-kernel@...r.kernel.org, kthota@...dia.com,
mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V2 2/2] PCI: dwc: Export APIs to support .remove()
implementation
On Tue, Apr 16, 2019 at 07:45:16PM +0530, Vidya Sagar wrote:
> Export all configuration space access APIs and also other APIs to
> support host controller drivers of DesignWare core based
> implementations while adding support for .remove() hook to build their
> respective drivers as modules
>
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
> ---
> v2:
> * s/Designware/DesignWare
>
> .../pci/controller/dwc/pcie-designware-host.c | 4 ++
> drivers/pci/controller/dwc/pcie-designware.c | 38 +++++++++++++++++++
> drivers/pci/controller/dwc/pcie-designware.h | 35 +++--------------
> 3 files changed, 48 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index d7881490282d..2a5332e5ccfa 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -333,6 +333,7 @@ void dw_pcie_msi_init(struct pcie_port *pp)
> dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4,
> upper_32_bits(msi_target));
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
>
> int dw_pcie_host_init(struct pcie_port *pp)
> {
> @@ -515,6 +516,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
> dw_pcie_free_msi(pp);
> return ret;
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_host_init);
>
> void dw_pcie_host_deinit(struct pcie_port *pp)
> {
> @@ -522,6 +524,7 @@ void dw_pcie_host_deinit(struct pcie_port *pp)
> pci_remove_root_bus(pp->root_bus);
> dw_pcie_free_msi(pp);
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_host_deinit);
>
> static int dw_pcie_access_other_conf(struct pcie_port *pp, struct pci_bus *bus,
> u32 devfn, int where, int size, u32 *val,
> @@ -731,3 +734,4 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
> val |= PORT_LOGIC_SPEED_CHANGE;
> dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_setup_rc);
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index 31f6331ca46f..f98e2f284ae1 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -40,6 +40,7 @@ int dw_pcie_read(void __iomem *addr, int size, u32 *val)
>
> return PCIBIOS_SUCCESSFUL;
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_read);
>
> int dw_pcie_write(void __iomem *addr, int size, u32 val)
> {
> @@ -57,6 +58,7 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
>
> return PCIBIOS_SUCCESSFUL;
> }
> +EXPORT_SYMBOL_GPL(dw_pcie_write);
>
> u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
> size_t size)
> @@ -89,6 +91,42 @@ void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
> dev_err(pci->dev, "Write DBI address failed\n");
> }
>
> +void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
> +{
> + __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_writel_dbi);
> +
> +u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
> +{
> + return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_readl_dbi);
> +
> +void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
> +{
> + __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_writew_dbi);
> +
> +u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
> +{
> + return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_readw_dbi);
> +
> +void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
> +{
> + __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_writeb_dbi);
> +
> +u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
> +{
> + return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
> +}
> +EXPORT_SYMBOL_GPL(dw_pcie_readb_dbi);
> +
> 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/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index ea8d1caf11c5..86df36701a37 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -265,35 +265,12 @@ 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);
>
> -static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
> -{
> - __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
> -}
> -
> -static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
> -{
> - return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
> -}
> -
> -static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
> -{
> - __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
> -}
> -
> -static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
> -{
> - return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
> -}
> -
> -static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
> -{
> - __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
> -}
> -
> -static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
> -{
> - return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
> -}
> +void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
> +u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
> +void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val);
> +u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg);
> +void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val);
> +u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg);
What's the point of exporting all these functions ?
Export __dw_pcie_{write/read}_dbi() and be done with it.
Thanks,
Lorenzo
>
> static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
> {
> --
> 2.17.1
>
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