On Fri, Jul 21, 2023 at 04:44:36PM +0900, Yoshihiro Shimoda wrote: > The __dw_pcie_prog_outbound_atu() currently has 6 arguments. > To support INTx IRQs in the future, it requires an additional 2 > arguments. For improved code readability, introduce the struct > dw_pcie_ob_atu_cfg and update the arguments of > dw_pcie_prog_outbound_atu(). > > Consequently, remove __dw_pcie_prog_outbound_atu() and > dw_pcie_prog_ep_outbound_atu() because there is no longer > a need. > > No behavior changes. So you decided not to use a suggested by me in v17 more detailed patch log? C&P it here just in case if you change your mind: This is a preparation before adding the Msg-type outbound iATU mapping. The respective update will require two more arguments added to __dw_pcie_prog_outbound_atu(). That will make the already complicated function prototype even more hard to comprehend accepting _eight_ arguments. In order to prevent that and keep the code more-or-less readable all the outbound iATU-related arguments are moved to the new config-structure: struct dw_pcie_ob_atu_cfg pointer to which shall be passed to dw_pcie_prog_outbound_atu(). The structure is supposed to be locally defined and populated with the outbound iATU settings implied by the caller context. As a result of the denoted change there is no longer need in having the two distinctive methods for the Host and End-point outbound iATU setups since the corresponding code can directly call the dw_pcie_prog_outbound_atu() method with the config-structure populated. Thus dw_pcie_prog_ep_outbound_atu() is dropped. -Serge(y) > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx> > --- > .../pci/controller/dwc/pcie-designware-ep.c | 21 +++++--- > .../pci/controller/dwc/pcie-designware-host.c | 52 +++++++++++++------ > drivers/pci/controller/dwc/pcie-designware.c | 49 ++++++----------- > drivers/pci/controller/dwc/pcie-designware.h | 15 ++++-- > 4 files changed, 77 insertions(+), 60 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c > index 27278010ecec..fe2e0d765be9 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c > @@ -182,9 +182,8 @@ static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, int type, > return 0; > } > > -static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, > - phys_addr_t phys_addr, > - u64 pci_addr, size_t size) > +static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, > + struct dw_pcie_ob_atu_cfg *atu) > { > struct dw_pcie *pci = to_dw_pcie_from_ep(ep); > u32 free_win; > @@ -196,13 +195,13 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, > return -EINVAL; > } > > - ret = dw_pcie_prog_ep_outbound_atu(pci, func_no, free_win, PCIE_ATU_TYPE_MEM, > - phys_addr, pci_addr, size); > + atu->index = free_win; > + ret = dw_pcie_prog_outbound_atu(pci, atu); > if (ret) > return ret; > > set_bit(free_win, ep->ob_window_map); > - ep->outbound_addr[free_win] = phys_addr; > + ep->outbound_addr[free_win] = atu->cpu_addr; > > return 0; > } > @@ -305,8 +304,14 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, > int ret; > struct dw_pcie_ep *ep = epc_get_drvdata(epc); > struct dw_pcie *pci = to_dw_pcie_from_ep(ep); > - > - ret = dw_pcie_ep_outbound_atu(ep, func_no, addr, pci_addr, size); > + struct dw_pcie_ob_atu_cfg atu = { 0 }; > + > + atu.func_no = func_no; > + atu.type = PCIE_ATU_TYPE_MEM; > + atu.cpu_addr = addr; > + atu.pci_addr = pci_addr; > + atu.size = size; > + ret = dw_pcie_ep_outbound_atu(ep, &atu); > if (ret) { > dev_err(pci->dev, "Failed to enable address\n"); > return ret; > diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c > index cf61733bf78d..7419185721f2 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-host.c > +++ b/drivers/pci/controller/dwc/pcie-designware-host.c > @@ -549,6 +549,7 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, > { > struct dw_pcie_rp *pp = bus->sysdata; > struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > + struct dw_pcie_ob_atu_cfg atu = { 0 }; > int type, ret; > u32 busdev; > > @@ -571,8 +572,12 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, > else > type = PCIE_ATU_TYPE_CFG1; > > - ret = dw_pcie_prog_outbound_atu(pci, 0, type, pp->cfg0_base, busdev, > - pp->cfg0_size); > + atu.type = type; > + atu.cpu_addr = pp->cfg0_base; > + atu.pci_addr = busdev; > + atu.size = pp->cfg0_size; > + > + ret = dw_pcie_prog_outbound_atu(pci, &atu); > if (ret) > return NULL; > > @@ -584,6 +589,7 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, > { > struct dw_pcie_rp *pp = bus->sysdata; > struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > + struct dw_pcie_ob_atu_cfg atu = { 0 }; > int ret; > > ret = pci_generic_config_read(bus, devfn, where, size, val); > @@ -591,9 +597,12 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, > return ret; > > if (pp->cfg0_io_shared) { > - ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, > - pp->io_base, pp->io_bus_addr, > - pp->io_size); > + atu.type = PCIE_ATU_TYPE_IO; > + atu.cpu_addr = pp->io_base; > + atu.pci_addr = pp->io_bus_addr; > + atu.size = pp->io_size; > + > + ret = dw_pcie_prog_outbound_atu(pci, &atu); > if (ret) > return PCIBIOS_SET_FAILED; > } > @@ -606,6 +615,7 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, > { > struct dw_pcie_rp *pp = bus->sysdata; > struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > + struct dw_pcie_ob_atu_cfg atu = { 0 }; > int ret; > > ret = pci_generic_config_write(bus, devfn, where, size, val); > @@ -613,9 +623,12 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, > return ret; > > if (pp->cfg0_io_shared) { > - ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, > - pp->io_base, pp->io_bus_addr, > - pp->io_size); > + atu.type = PCIE_ATU_TYPE_IO; > + atu.cpu_addr = pp->io_base; > + atu.pci_addr = pp->io_bus_addr; > + atu.size = pp->io_size; > + > + ret = dw_pcie_prog_outbound_atu(pci, &atu); > if (ret) > return PCIBIOS_SET_FAILED; > } > @@ -650,6 +663,7 @@ static struct pci_ops dw_pcie_ops = { > static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) > { > struct dw_pcie *pci = to_dw_pcie_from_pp(pp); > + struct dw_pcie_ob_atu_cfg atu = { 0 }; > struct resource_entry *entry; > int i, ret; > > @@ -677,10 +691,13 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) > if (pci->num_ob_windows <= ++i) > break; > > - ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_MEM, > - entry->res->start, > - entry->res->start - entry->offset, > - resource_size(entry->res)); > + atu.index = i; > + atu.type = PCIE_ATU_TYPE_MEM; > + atu.cpu_addr = entry->res->start; > + atu.pci_addr = entry->res->start - entry->offset; > + atu.size = resource_size(entry->res); > + > + ret = dw_pcie_prog_outbound_atu(pci, &atu); > if (ret) { > dev_err(pci->dev, "Failed to set MEM range %pr\n", > entry->res); > @@ -690,10 +707,13 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) > > if (pp->io_size) { > if (pci->num_ob_windows > ++i) { > - ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_IO, > - pp->io_base, > - pp->io_bus_addr, > - pp->io_size); > + atu.index = i; > + atu.type = PCIE_ATU_TYPE_IO; > + atu.cpu_addr = pp->io_base; > + atu.pci_addr = pp->io_bus_addr; > + atu.size = pp->io_size; > + > + ret = dw_pcie_prog_outbound_atu(pci, &atu); > if (ret) { > dev_err(pci->dev, "Failed to set IO range %pr\n", > entry->res); > diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c > index 2459f2a61b9b..49b785509576 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.c > +++ b/drivers/pci/controller/dwc/pcie-designware.c > @@ -464,56 +464,56 @@ static inline u32 dw_pcie_enable_ecrc(u32 val) > return val | PCIE_ATU_TD; > } > > -static int __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, > - int index, int type, u64 cpu_addr, > - u64 pci_addr, u64 size) > +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, > + const struct dw_pcie_ob_atu_cfg *atu) > { > + u64 cpu_addr = atu->cpu_addr; > u32 retries, val; > u64 limit_addr; > > if (pci->ops && pci->ops->cpu_addr_fixup) > cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr); > > - limit_addr = cpu_addr + size - 1; > + limit_addr = cpu_addr + atu->size - 1; > > if ((limit_addr & ~pci->region_limit) != (cpu_addr & ~pci->region_limit) || > !IS_ALIGNED(cpu_addr, pci->region_align) || > - !IS_ALIGNED(pci_addr, pci->region_align) || !size) { > + !IS_ALIGNED(atu->pci_addr, pci->region_align) || !atu->size) { > return -EINVAL; > } > > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_BASE, > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LOWER_BASE, > lower_32_bits(cpu_addr)); > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_BASE, > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_BASE, > upper_32_bits(cpu_addr)); > > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LIMIT, > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LIMIT, > lower_32_bits(limit_addr)); > if (dw_pcie_ver_is_ge(pci, 460A)) > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_LIMIT, > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_LIMIT, > upper_32_bits(limit_addr)); > > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_TARGET, > - lower_32_bits(pci_addr)); > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_TARGET, > - upper_32_bits(pci_addr)); > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LOWER_TARGET, > + lower_32_bits(atu->pci_addr)); > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET, > + upper_32_bits(atu->pci_addr)); > > - val = type | PCIE_ATU_FUNC_NUM(func_no); > + val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no); > if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && > dw_pcie_ver_is_ge(pci, 460A)) > val |= PCIE_ATU_INCREASE_REGION_SIZE; > if (dw_pcie_ver_is(pci, 490A)) > val = dw_pcie_enable_ecrc(val); > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL1, val); > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val); > > - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); > + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); > > /* > * Make sure ATU enable takes effect before any subsequent config > * and I/O accesses. > */ > for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { > - val = dw_pcie_readl_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2); > + val = dw_pcie_readl_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2); > if (val & PCIE_ATU_ENABLE) > return 0; > > @@ -525,21 +525,6 @@ static int __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, > return -ETIMEDOUT; > } > > -int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, > - u64 cpu_addr, u64 pci_addr, u64 size) > -{ > - return __dw_pcie_prog_outbound_atu(pci, 0, index, type, > - cpu_addr, pci_addr, size); > -} > - > -int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, > - int type, u64 cpu_addr, u64 pci_addr, > - u64 size) > -{ > - return __dw_pcie_prog_outbound_atu(pci, func_no, index, type, > - cpu_addr, pci_addr, size); > -} > - > static inline u32 dw_pcie_readl_atu_ib(struct dw_pcie *pci, u32 index, u32 reg) > { > return dw_pcie_readl_atu(pci, PCIE_ATU_REGION_DIR_IB, index, reg); > diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h > index 3c06e025c905..85de0d8346fa 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -288,6 +288,15 @@ enum dw_pcie_core_rst { > DW_PCIE_NUM_CORE_RSTS > }; > > +struct dw_pcie_ob_atu_cfg { > + int index; > + int type; > + u8 func_no; > + u64 cpu_addr; > + u64 pci_addr; > + u64 size; > +}; > + > struct dw_pcie_host_ops { > int (*host_init)(struct dw_pcie_rp *pp); > void (*host_deinit)(struct dw_pcie_rp *pp); > @@ -416,10 +425,8 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val); > int dw_pcie_link_up(struct dw_pcie *pci); > void dw_pcie_upconfig_setup(struct dw_pcie *pci); > int dw_pcie_wait_for_link(struct dw_pcie *pci); > -int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, > - u64 cpu_addr, u64 pci_addr, u64 size); > -int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, > - int type, u64 cpu_addr, u64 pci_addr, u64 size); > +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, > + const struct dw_pcie_ob_atu_cfg *atu); > int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int type, > u64 cpu_addr, u64 pci_addr, u64 size); > int dw_pcie_prog_ep_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, > -- > 2.25.1 >