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| author | Oza Pawandeep <oza.oza@broadcom.com> | 2017-08-28 16:43:24 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-08-28 16:43:24 -0500 |
| commit | d005045bcf4234cc537ee6138b91830e6e5019f0 (patch) | |
| tree | 45beebaae78da7ba2f7a976527c362dc41ef06cd /drivers/pci/host/pcie-iproc.c | |
| parent | 5bbe4397f4cff66cda0484f0f20fcf5cbb0930e5 (diff) | |
| download | blackbird-op-linux-d005045bcf4234cc537ee6138b91830e6e5019f0.tar.gz blackbird-op-linux-d005045bcf4234cc537ee6138b91830e6e5019f0.zip | |
PCI: iproc: Factor out memory-mapped config access address calculation
Factor out the address calculation for memory-mapped config accesses as a
separate function. No functional change intended.
Signed-off-by: Oza Pawandeep <oza.oza@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/host/pcie-iproc.c')
| -rw-r--r-- | drivers/pci/host/pcie-iproc.c | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index c57486348856..61d9be69ca56 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -448,6 +448,31 @@ static inline void iproc_pcie_apb_err_disable(struct pci_bus *bus, } } +static void __iomem *iproc_pcie_map_ep_cfg_reg(struct iproc_pcie *pcie, + unsigned int busno, + unsigned int slot, + unsigned int fn, + int where) +{ + u16 offset; + u32 val; + + /* EP device access */ + val = (busno << CFG_ADDR_BUS_NUM_SHIFT) | + (slot << CFG_ADDR_DEV_NUM_SHIFT) | + (fn << CFG_ADDR_FUNC_NUM_SHIFT) | + (where & CFG_ADDR_REG_NUM_MASK) | + (1 & CFG_ADDR_CFG_TYPE_MASK); + + iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val); + offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA); + + if (iproc_pcie_reg_is_invalid(offset)) + return NULL; + + return (pcie->base + offset); +} + /** * Note access to the configuration registers are protected at the higher layer * by 'pci_lock' in drivers/pci/access.c @@ -459,7 +484,6 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct iproc_pcie *pcie, { unsigned slot = PCI_SLOT(devfn); unsigned fn = PCI_FUNC(devfn); - u32 val; u16 offset; /* root complex access */ @@ -484,18 +508,7 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct iproc_pcie *pcie, if (slot > 0) return NULL; - /* EP device access */ - val = (busno << CFG_ADDR_BUS_NUM_SHIFT) | - (slot << CFG_ADDR_DEV_NUM_SHIFT) | - (fn << CFG_ADDR_FUNC_NUM_SHIFT) | - (where & CFG_ADDR_REG_NUM_MASK) | - (1 & CFG_ADDR_CFG_TYPE_MASK); - iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val); - offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA); - if (iproc_pcie_reg_is_invalid(offset)) - return NULL; - else - return (pcie->base + offset); + return iproc_pcie_map_ep_cfg_reg(pcie, busno, slot, fn, where); } static void __iomem *iproc_pcie_bus_map_cfg_bus(struct pci_bus *bus, |
