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PCI: dwc: Cleanup DBI,ATU read and write APIs

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Cleanup DBI read and write APIs by removing leading "__" (underscore)
from their names as there is no reason to have leading underscores
in the first place in the function definition.

Remove dbi/dbi2 base address parameters as the same behaviour can be
obtained through read and write APIs. Since dw_pcie_{readl/writel}_dbi()
APIs can't be used for ATU read/write as ATU base address could be
different from DBI base address, implement ATU read/write APIs using ATU
base address without using dw_pcie_{readl/writel}_dbi() APIs.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
This commit is contained in:
Vidya Sagar 2019-06-25 14:52:37 +05:30 committed by Lorenzo Pieralisi
parent 9d071cade3
commit 7bc082d7e9
2 changed files with 57 additions and 34 deletions
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57
drivers/pci/controller/dwc/pcie-designware.c
View file

@ -52,68 +52,93 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size)
u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi)
return pci->ops->read_dbi(pci, base, reg, size);
return pci->ops->read_dbi(pci, pci->dbi_base, reg, size);
ret = dw_pcie_read(base + reg, size, &val);
ret = dw_pcie_read(pci->dbi_base + reg, size, &val);
if (ret)
dev_err(pci->dev, "Read DBI address failed\n");
return val;
}
void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size, u32 val)
void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi) {
pci->ops->write_dbi(pci, base, reg, size, val);
pci->ops->write_dbi(pci, pci->dbi_base, reg, size, val);
return;
}
ret = dw_pcie_write(base + reg, size, val);
ret = dw_pcie_write(pci->dbi_base + reg, size, val);
if (ret)
dev_err(pci->dev, "Write DBI address failed\n");
}
u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size)
u32 dw_pcie_read_dbi2(struct dw_pcie *pci, u32 reg, size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi2)
return pci->ops->read_dbi2(pci, base, reg, size);
return pci->ops->read_dbi2(pci, pci->dbi_base2, reg, size);
ret = dw_pcie_read(base + reg, size, &val);
ret = dw_pcie_read(pci->dbi_base2 + reg, size, &val);
if (ret)
dev_err(pci->dev, "read DBI address failed\n");
return val;
}
void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size, u32 val)
void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi2) {
pci->ops->write_dbi2(pci, base, reg, size, val);
pci->ops->write_dbi2(pci, pci->dbi_base2, reg, size, val);
return;
}
ret = dw_pcie_write(base + reg, size, val);
ret = dw_pcie_write(pci->dbi_base2 + reg, size, val);
if (ret)
dev_err(pci->dev, "write DBI address failed\n");
}
u32 dw_pcie_read_atu(struct dw_pcie *pci, u32 reg, size_t size)
{
int ret;
u32 val;
if (pci->ops->read_dbi)
return pci->ops->read_dbi(pci, pci->atu_base, reg, size);
ret = dw_pcie_read(pci->atu_base + reg, size, &val);
if (ret)
dev_err(pci->dev, "Read ATU address failed\n");
return val;
}
void dw_pcie_write_atu(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
{
int ret;
if (pci->ops->write_dbi) {
pci->ops->write_dbi(pci, pci->atu_base, reg, size, val);
return;
}
ret = dw_pcie_write(pci->atu_base + reg, size, val);
if (ret)
dev_err(pci->dev, "Write ATU address failed\n");
}
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);

34
drivers/pci/controller/dwc/pcie-designware.h
View file

@ -254,14 +254,12 @@ 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_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size);
void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size, u32 val);
u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size);
void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg,
size_t size, u32 val);
u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size);
void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
u32 dw_pcie_read_dbi2(struct dw_pcie *pci, u32 reg, size_t size);
void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
u32 dw_pcie_read_atu(struct dw_pcie *pci, u32 reg, size_t size);
void dw_pcie_write_atu(struct dw_pcie *pci, u32 reg, size_t size, 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,
@ -275,52 +273,52 @@ 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);
dw_pcie_write_dbi(pci, 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);
return dw_pcie_read_dbi(pci, 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);
dw_pcie_write_dbi(pci, 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);
return dw_pcie_read_dbi(pci, 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);
dw_pcie_write_dbi(pci, 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);
return dw_pcie_read_dbi(pci, reg, 0x1);
}
static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
{
__dw_pcie_write_dbi2(pci, pci->dbi_base2, reg, 0x4, val);
dw_pcie_write_dbi2(pci, reg, 0x4, val);
}
static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg)
{
return __dw_pcie_read_dbi2(pci, pci->dbi_base2, reg, 0x4);
return dw_pcie_read_dbi2(pci, reg, 0x4);
}
static inline void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val)
{
__dw_pcie_write_dbi(pci, pci->atu_base, reg, 0x4, val);
dw_pcie_write_atu(pci, reg, 0x4, val);
}
static inline u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 reg)
{
return __dw_pcie_read_dbi(pci, pci->atu_base, reg, 0x4);
return dw_pcie_read_atu(pci, reg, 0x4);
}
static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci)