| Message ID | 20241028-pci_fixup_addr-v6-2-ebebcd8fd4ff@nxp.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: dwc: opitimaze RC Host/EP pci_fixup_addr() | expand |
Hi Frank, kernel test robot noticed the following build errors: [auto build test ERROR on 9852d85ec9d492ebef56dc5f229416c925758edc] url: https://github.com/intel-lab-lkp/linux/commits/Frank-Li/of-address-Add-parent_bus_addr-to-struct-of_pci_range/20241029-030935 base: 9852d85ec9d492ebef56dc5f229416c925758edc patch link: https://lore.kernel.org/r/20241028-pci_fixup_addr-v6-2-ebebcd8fd4ff%40nxp.com patch subject: [PATCH v6 2/7] PCI: dwc: Using parent_bus_addr in of_range to eliminate cpu_addr_fixup() config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20241029/202410291248.Qc61mosK-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241029/202410291248.Qc61mosK-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202410291248.Qc61mosK-lkp@intel.com/ All errors (new ones prefixed by >>): drivers/pci/controller/dwc/pcie-designware-host.c: In function 'dw_pcie_iatu_setup': >> drivers/pci/controller/dwc/pcie-designware-host.c:782:69: error: passing argument 3 of 'dw_pcie_get_untranslate_addr' from incompatible pointer type [-Wincompatible-pointer-types] 782 | if (dw_pcie_get_untranslate_addr(pci, atu.pci_addr, &atu.cpu_addr)) | ^~~~~~~~~~~~~ | | | u64 * {aka long long unsigned int *} drivers/pci/controller/dwc/pcie-designware-host.c:422:58: note: expected 'resource_size_t *' {aka 'unsigned int *'} but argument is of type 'u64 *' {aka 'long long unsigned int *'} 422 | resource_size_t *i_addr) | ~~~~~~~~~~~~~~~~~^~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for GET_FREE_REGION Depends on [n]: SPARSEMEM [=n] Selected by [y]: - RESOURCE_KUNIT_TEST [=y] && RUNTIME_TESTING_MENU [=y] && KUNIT [=y] vim +/dw_pcie_get_untranslate_addr +782 drivers/pci/controller/dwc/pcie-designware-host.c 745 746 static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) 747 { 748 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 749 struct dw_pcie_ob_atu_cfg atu = { 0 }; 750 struct resource_entry *entry; 751 int i, ret; 752 753 /* Note the very first outbound ATU is used for CFG IOs */ 754 if (!pci->num_ob_windows) { 755 dev_err(pci->dev, "No outbound iATU found\n"); 756 return -EINVAL; 757 } 758 759 /* 760 * Ensure all out/inbound windows are disabled before proceeding with 761 * the MEM/IO (dma-)ranges setups. 762 */ 763 for (i = 0; i < pci->num_ob_windows; i++) 764 dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_OB, i); 765 766 for (i = 0; i < pci->num_ib_windows; i++) 767 dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_IB, i); 768 769 i = 0; 770 resource_list_for_each_entry(entry, &pp->bridge->windows) { 771 if (resource_type(entry->res) != IORESOURCE_MEM) 772 continue; 773 774 if (pci->num_ob_windows <= ++i) 775 break; 776 777 atu.index = i; 778 atu.type = PCIE_ATU_TYPE_MEM; 779 atu.cpu_addr = entry->res->start; 780 atu.pci_addr = entry->res->start - entry->offset; 781 > 782 if (dw_pcie_get_untranslate_addr(pci, atu.pci_addr, &atu.cpu_addr)) 783 return -EINVAL; 784 785 /* Adjust iATU size if MSG TLP region was allocated before */ 786 if (pp->msg_res && pp->msg_res->parent == entry->res) 787 atu.size = resource_size(entry->res) - 788 resource_size(pp->msg_res); 789 else 790 atu.size = resource_size(entry->res); 791 792 ret = dw_pcie_prog_outbound_atu(pci, &atu); 793 if (ret) { 794 dev_err(pci->dev, "Failed to set MEM range %pr\n", 795 entry->res); 796 return ret; 797 } 798 } 799 800 if (pp->io_size) { 801 if (pci->num_ob_windows > ++i) { 802 atu.index = i; 803 atu.type = PCIE_ATU_TYPE_IO; 804 atu.cpu_addr = pp->io_base; 805 atu.pci_addr = pp->io_bus_addr; 806 atu.size = pp->io_size; 807 808 ret = dw_pcie_prog_outbound_atu(pci, &atu); 809 if (ret) { 810 dev_err(pci->dev, "Failed to set IO range %pr\n", 811 entry->res); 812 return ret; 813 } 814 } else { 815 pp->cfg0_io_shared = true; 816 } 817 } 818 819 if (pci->num_ob_windows <= i) 820 dev_warn(pci->dev, "Ranges exceed outbound iATU size (%d)\n", 821 pci->num_ob_windows); 822 823 pp->msg_atu_index = i; 824 825 i = 0; 826 resource_list_for_each_entry(entry, &pp->bridge->dma_ranges) { 827 if (resource_type(entry->res) != IORESOURCE_MEM) 828 continue; 829 830 if (pci->num_ib_windows <= i) 831 break; 832 833 ret = dw_pcie_prog_inbound_atu(pci, i++, PCIE_ATU_TYPE_MEM, 834 entry->res->start, 835 entry->res->start - entry->offset, 836 resource_size(entry->res)); 837 if (ret) { 838 dev_err(pci->dev, "Failed to set DMA range %pr\n", 839 entry->res); 840 return ret; 841 } 842 } 843 844 if (pci->num_ib_windows <= i) 845 dev_warn(pci->dev, "Dma-ranges exceed inbound iATU size (%u)\n", 846 pci->num_ib_windows); 847 848 return 0; 849 } 850
Hi Frank, kernel test robot noticed the following build errors: [auto build test ERROR on 9852d85ec9d492ebef56dc5f229416c925758edc] url: https://github.com/intel-lab-lkp/linux/commits/Frank-Li/of-address-Add-parent_bus_addr-to-struct-of_pci_range/20241029-030935 base: 9852d85ec9d492ebef56dc5f229416c925758edc patch link: https://lore.kernel.org/r/20241028-pci_fixup_addr-v6-2-ebebcd8fd4ff%40nxp.com patch subject: [PATCH v6 2/7] PCI: dwc: Using parent_bus_addr in of_range to eliminate cpu_addr_fixup() config: arm-defconfig (https://download.01.org/0day-ci/archive/20241029/202410291546.kvgEWJv7-lkp@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241029/202410291546.kvgEWJv7-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202410291546.kvgEWJv7-lkp@intel.com/ All errors (new ones prefixed by >>): >> drivers/pci/controller/dwc/pcie-designware-host.c:782:55: error: incompatible pointer types passing 'u64 *' (aka 'unsigned long long *') to parameter of type 'resource_size_t *' (aka 'unsigned int *') [-Werror,-Wincompatible-pointer-types] if (dw_pcie_get_untranslate_addr(pci, atu.pci_addr, &atu.cpu_addr)) ^~~~~~~~~~~~~ drivers/pci/controller/dwc/pcie-designware-host.c:422:23: note: passing argument to parameter 'i_addr' here resource_size_t *i_addr) ^ 1 error generated. vim +782 drivers/pci/controller/dwc/pcie-designware-host.c 745 746 static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) 747 { 748 struct dw_pcie *pci = to_dw_pcie_from_pp(pp); 749 struct dw_pcie_ob_atu_cfg atu = { 0 }; 750 struct resource_entry *entry; 751 int i, ret; 752 753 /* Note the very first outbound ATU is used for CFG IOs */ 754 if (!pci->num_ob_windows) { 755 dev_err(pci->dev, "No outbound iATU found\n"); 756 return -EINVAL; 757 } 758 759 /* 760 * Ensure all out/inbound windows are disabled before proceeding with 761 * the MEM/IO (dma-)ranges setups. 762 */ 763 for (i = 0; i < pci->num_ob_windows; i++) 764 dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_OB, i); 765 766 for (i = 0; i < pci->num_ib_windows; i++) 767 dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_IB, i); 768 769 i = 0; 770 resource_list_for_each_entry(entry, &pp->bridge->windows) { 771 if (resource_type(entry->res) != IORESOURCE_MEM) 772 continue; 773 774 if (pci->num_ob_windows <= ++i) 775 break; 776 777 atu.index = i; 778 atu.type = PCIE_ATU_TYPE_MEM; 779 atu.cpu_addr = entry->res->start; 780 atu.pci_addr = entry->res->start - entry->offset; 781 > 782 if (dw_pcie_get_untranslate_addr(pci, atu.pci_addr, &atu.cpu_addr)) 783 return -EINVAL; 784 785 /* Adjust iATU size if MSG TLP region was allocated before */ 786 if (pp->msg_res && pp->msg_res->parent == entry->res) 787 atu.size = resource_size(entry->res) - 788 resource_size(pp->msg_res); 789 else 790 atu.size = resource_size(entry->res); 791 792 ret = dw_pcie_prog_outbound_atu(pci, &atu); 793 if (ret) { 794 dev_err(pci->dev, "Failed to set MEM range %pr\n", 795 entry->res); 796 return ret; 797 } 798 } 799 800 if (pp->io_size) { 801 if (pci->num_ob_windows > ++i) { 802 atu.index = i; 803 atu.type = PCIE_ATU_TYPE_IO; 804 atu.cpu_addr = pp->io_base; 805 atu.pci_addr = pp->io_bus_addr; 806 atu.size = pp->io_size; 807 808 ret = dw_pcie_prog_outbound_atu(pci, &atu); 809 if (ret) { 810 dev_err(pci->dev, "Failed to set IO range %pr\n", 811 entry->res); 812 return ret; 813 } 814 } else { 815 pp->cfg0_io_shared = true; 816 } 817 } 818 819 if (pci->num_ob_windows <= i) 820 dev_warn(pci->dev, "Ranges exceed outbound iATU size (%d)\n", 821 pci->num_ob_windows); 822 823 pp->msg_atu_index = i; 824 825 i = 0; 826 resource_list_for_each_entry(entry, &pp->bridge->dma_ranges) { 827 if (resource_type(entry->res) != IORESOURCE_MEM) 828 continue; 829 830 if (pci->num_ib_windows <= i) 831 break; 832 833 ret = dw_pcie_prog_inbound_atu(pci, i++, PCIE_ATU_TYPE_MEM, 834 entry->res->start, 835 entry->res->start - entry->offset, 836 resource_size(entry->res)); 837 if (ret) { 838 dev_err(pci->dev, "Failed to set DMA range %pr\n", 839 entry->res); 840 return ret; 841 } 842 } 843 844 if (pci->num_ib_windows <= i) 845 dev_warn(pci->dev, "Dma-ranges exceed inbound iATU size (%u)\n", 846 pci->num_ib_windows); 847 848 return 0; 849 } 850
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 3e41865c72904..a4f2578700eb3 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -418,6 +418,34 @@ static void dw_pcie_host_request_msg_tlp_res(struct dw_pcie_rp *pp) } } +static int dw_pcie_get_untranslate_addr(struct dw_pcie *pci, resource_size_t pci_addr, + resource_size_t *i_addr) +{ + struct device *dev = pci->dev; + struct device_node *np = dev->of_node; + struct of_range_parser parser; + struct of_range range; + int ret; + + if (!pci->using_dtbus_info) { + *i_addr = pci_addr; + return 0; + } + + ret = of_range_parser_init(&parser, np); + if (ret) + return ret; + + for_each_of_pci_range(&parser, &range) { + if (pci_addr == range.bus_addr) { + *i_addr = range.parent_bus_addr; + break; + } + } + + return 0; +} + int dw_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); @@ -427,6 +455,7 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) struct resource_entry *win; struct pci_host_bridge *bridge; struct resource *res; + int index; int ret; raw_spin_lock_init(&pp->lock); @@ -440,6 +469,20 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) pp->cfg0_size = resource_size(res); pp->cfg0_base = res->start; + if (pci->using_dtbus_info) { + index = of_property_match_string(np, "reg-names", "config"); + if (index < 0) + return -EINVAL; + /* + * Retrieve the parent bus address of PCI config space. + * If the parent bus ranges in the device tree provide + * the correct address conversion information, set + * 'using_dtbus_info' to true, The 'cpu_addr_fixup()' + * can be eliminated. + */ + of_property_read_reg(np, index, &pp->cfg0_base, NULL); + } + pp->va_cfg0_base = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pp->va_cfg0_base)) return PTR_ERR(pp->va_cfg0_base); @@ -462,6 +505,9 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) pp->io_base = pci_pio_to_address(win->res->start); } + if (dw_pcie_get_untranslate_addr(pci, pp->io_bus_addr, &pp->io_base)) + return -ENODEV; + /* Set default bus ops */ bridge->ops = &dw_pcie_ops; bridge->child_ops = &dw_child_pcie_ops; @@ -733,6 +779,9 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) atu.cpu_addr = entry->res->start; atu.pci_addr = entry->res->start - entry->offset; + if (dw_pcie_get_untranslate_addr(pci, atu.pci_addr, &atu.cpu_addr)) + return -EINVAL; + /* Adjust iATU size if MSG TLP region was allocated before */ if (pp->msg_res && pp->msg_res->parent == entry->res) atu.size = resource_size(entry->res) - diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 347ab74ac35aa..f8067393ad35a 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -463,6 +463,14 @@ struct dw_pcie { struct reset_control_bulk_data core_rsts[DW_PCIE_NUM_CORE_RSTS]; struct gpio_desc *pe_rst; bool suspended; + /* + * Use device tree 'ranges' property of bus node instead using + * cpu_addr_fixup(). Some old platform dts 'ranges' in bus node may not + * reflect real hardware's behavior. In case break these platform back + * compatibility, add below flags. Set it true if dts already correct + * indicate bus fabric address convert. + */ + bool using_dtbus_info; }; #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
parent_bus_addr in struct of_range can indicate address information just ahead of PCIe controller. Most system's bus fabric use 1:1 map between input and output address. but some hardware like i.MX8QXP doesn't use 1:1 map. See below diagram: ┌─────────┐ ┌────────────┐ ┌─────┐ │ │ IA: 0x8ff8_0000 │ │ │ CPU ├───►│ ┌────►├─────────────────┐ │ PCI │ └─────┘ │ │ │ IA: 0x8ff0_0000 │ │ │ CPU Addr │ │ ┌─►├─────────────┐ │ │ Controller │ 0x7ff8_0000─┼───┘ │ │ │ │ │ │ │ │ │ │ │ │ │ PCI Addr 0x7ff0_0000─┼──────┘ │ │ └──► IOSpace ─┼────────────► │ │ │ │ │ 0 0x7000_0000─┼────────►├─────────┐ │ │ │ └─────────┘ │ └──────► CfgSpace ─┼────────────► BUS Fabric │ │ │ 0 │ │ │ └──────────► MemSpace ─┼────────────► IA: 0x8000_0000 │ │ 0x8000_0000 └────────────┘ bus@5f000000 { compatible = "simple-bus"; #address-cells = <1>; #size-cells = <1>; ranges = <0x80000000 0x0 0x70000000 0x10000000>; pcie@5f010000 { compatible = "fsl,imx8q-pcie"; reg = <0x5f010000 0x10000>, <0x8ff00000 0x80000>; reg-names = "dbi", "config"; #address-cells = <3>; #size-cells = <2>; device_type = "pci"; bus-range = <0x00 0xff>; ranges = <0x81000000 0 0x00000000 0x8ff80000 0 0x00010000>, <0x82000000 0 0x80000000 0x80000000 0 0x0ff00000>; ... }; }; Term internal address (IA) here means the address just before PCIe controller. After ATU use this IA instead CPU address, cpu_addr_fixup() can be removed. Signed-off-by: Frank Li <Frank.Li@nxp.com> --- Chagne from v5 to v6 -add comments for of_property_read_reg(). Change from v4 to v5 - remove confused 0x5f00_0000 range in sample dts. - reorder address at above diagram. Change from v3 to v4 - none Change from v2 to v3 - %s/cpu_untranslate_addr/parent_bus_addr/g - update diagram. - improve commit message. Change from v1 to v2 - update because patch1 change get untranslate address method. - add using_dtbus_info in case break back compatibility for exited platform. --- drivers/pci/controller/dwc/pcie-designware-host.c | 49 +++++++++++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 8 ++++ 2 files changed, 57 insertions(+)