diff options
| author | Hans Zhang <18255117159@163.com> | 2025-08-19 22:58:28 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-08-20 15:56:19 -0500 |
| commit | 3a33020d22bff1650af59314b6faea7efb04bf89 (patch) | |
| tree | 0bfa555d67622e3126a8e782d92feafe697fa1f1 /drivers/pci/controller/dwc | |
| parent | 8ffc9f234fdf332310015d507ae22db9a2820d37 (diff) | |
PCI: dwc: ep: Implement capability search using PCI core APIs
The PCI core now provides generic PCI_FIND_NEXT_CAP() macros to search for
PCI capabilities, using config accessors we supply.
Use them in the DWC EP driver to implement dw_pcie_ep_find_capability()
instead of duplicating the algorithm.
Signed-off-by: Hans Zhang <18255117159@163.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250819145828.438541-1-18255117159@163.com
Diffstat (limited to 'drivers/pci/controller/dwc')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware-ep.c | 31 | ||||
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.h | 21 |
2 files changed, 23 insertions, 29 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 0ae54a94809b..7f2112c2fb21 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -69,37 +69,10 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) } EXPORT_SYMBOL_GPL(dw_pcie_ep_reset_bar); -static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no, - u8 cap_ptr, u8 cap) -{ - u8 cap_id, next_cap_ptr; - u16 reg; - - if (!cap_ptr) - return 0; - - reg = dw_pcie_ep_readw_dbi(ep, func_no, cap_ptr); - cap_id = (reg & 0x00ff); - - if (cap_id > PCI_CAP_ID_MAX) - return 0; - - if (cap_id == cap) - return cap_ptr; - - next_cap_ptr = (reg & 0xff00) >> 8; - return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap); -} - static u8 dw_pcie_ep_find_capability(struct dw_pcie_ep *ep, u8 func_no, u8 cap) { - u8 next_cap_ptr; - u16 reg; - - reg = dw_pcie_ep_readw_dbi(ep, func_no, PCI_CAPABILITY_LIST); - next_cap_ptr = (reg & 0x00ff); - - return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap); + return PCI_FIND_NEXT_CAP(dw_pcie_ep_read_cfg, PCI_CAPABILITY_LIST, + cap, ep, func_no); } /** diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index b5e7e18138a6..a44f2113925d 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -695,6 +695,27 @@ static inline u8 dw_pcie_ep_readb_dbi(struct dw_pcie_ep *ep, u8 func_no, return dw_pcie_ep_read_dbi(ep, func_no, reg, 0x1); } +static inline int dw_pcie_ep_read_cfg_byte(struct dw_pcie_ep *ep, u8 func_no, + int where, u8 *val) +{ + *val = dw_pcie_ep_readb_dbi(ep, func_no, where); + return PCIBIOS_SUCCESSFUL; +} + +static inline int dw_pcie_ep_read_cfg_word(struct dw_pcie_ep *ep, u8 func_no, + int where, u16 *val) +{ + *val = dw_pcie_ep_readw_dbi(ep, func_no, where); + return PCIBIOS_SUCCESSFUL; +} + +static inline int dw_pcie_ep_read_cfg_dword(struct dw_pcie_ep *ep, u8 func_no, + int where, u32 *val) +{ + *val = dw_pcie_ep_readl_dbi(ep, func_no, where); + return PCIBIOS_SUCCESSFUL; +} + static inline unsigned int dw_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, u8 func_no) { |