From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> We know the parent_bus_offset, either computed from a DT reg property (the offset is the CPU physical addr - the 'config'/'addr_space' address on the parent bus) or from a .cpu_addr_fixup() (which may have used a host bridge window offset). Apply that parent_bus_offset instead of calling .cpu_addr_fixup() again. This assumes that all intermediate addresses are at the same offset from the CPU physical addresses. Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Signed-off-by: Frank Li <Frank.Li@xxxxxxx> --- change from v9 to v10 v9: https://lore.kernel.org/linux-pci/20250307233744.440476-5-helgaas@xxxxxxxxxx/#R - pp -> pci - add ep side support --- drivers/pci/controller/dwc/pcie-designware-ep.c | 5 +++-- drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++------ drivers/pci/controller/dwc/pcie-designware.c | 3 --- 3 files changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index d69d76c150d92..62bc71ad20719 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -314,7 +314,8 @@ static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - ret = dw_pcie_find_index(ep, addr, &atu_index); + ret = dw_pcie_find_index(ep, addr - pci->parent_bus_offset, + &atu_index); if (ret < 0) return; @@ -333,7 +334,7 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, atu.func_no = func_no; atu.type = PCIE_ATU_TYPE_MEM; - atu.parent_bus_addr = addr; + atu.parent_bus_addr = addr - pci->parent_bus_offset; atu.pci_addr = pci_addr; atu.size = size; ret = dw_pcie_ep_outbound_atu(ep, &atu); diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index eaa6dd4c7edda..a7b7e15d7b0db 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -637,7 +637,7 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, type = PCIE_ATU_TYPE_CFG1; atu.type = type; - atu.parent_bus_addr = pp->cfg0_base; + atu.parent_bus_addr = pp->cfg0_base - pci->parent_bus_offset; atu.pci_addr = busdev; atu.size = pp->cfg0_size; @@ -662,7 +662,7 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, if (pp->cfg0_io_shared) { atu.type = PCIE_ATU_TYPE_IO; - atu.parent_bus_addr = pp->io_base; + atu.parent_bus_addr = pp->io_base - pci->parent_bus_offset; atu.pci_addr = pp->io_bus_addr; atu.size = pp->io_size; @@ -688,7 +688,7 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, if (pp->cfg0_io_shared) { atu.type = PCIE_ATU_TYPE_IO; - atu.parent_bus_addr = pp->io_base; + atu.parent_bus_addr = pp->io_base - pci->parent_bus_offset; atu.pci_addr = pp->io_bus_addr; atu.size = pp->io_size; @@ -757,7 +757,7 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) atu.index = i; atu.type = PCIE_ATU_TYPE_MEM; - atu.parent_bus_addr = entry->res->start; + atu.parent_bus_addr = entry->res->start - pci->parent_bus_offset; atu.pci_addr = entry->res->start - entry->offset; /* Adjust iATU size if MSG TLP region was allocated before */ @@ -779,7 +779,7 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) if (pci->num_ob_windows > ++i) { atu.index = i; atu.type = PCIE_ATU_TYPE_IO; - atu.parent_bus_addr = pp->io_base; + atu.parent_bus_addr = pp->io_base - pci->parent_bus_offset; atu.pci_addr = pp->io_bus_addr; atu.size = pp->io_size; @@ -923,7 +923,7 @@ static int dw_pcie_pme_turn_off(struct dw_pcie *pci) atu.size = resource_size(pci->pp.msg_res); atu.index = pci->pp.msg_atu_index; - atu.parent_bus_addr = pci->pp.msg_res->start; + atu.parent_bus_addr = pci->pp.msg_res->start - pci->parent_bus_offset; ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 70b4d3369158a..7061a7ec08cb2 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -475,9 +475,6 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u32 retries, val; u64 limit_addr; - if (pci->ops && pci->ops->cpu_addr_fixup) - parent_bus_addr = pci->ops->cpu_addr_fixup(pci, parent_bus_addr); - limit_addr = parent_bus_addr + atu->size - 1; if ((limit_addr & ~pci->region_limit) != (parent_bus_addr & ~pci->region_limit) || -- 2.34.1
