PIRQ routing is pretty much common in Intel chipset. It has several PIRQ links (normally 8) and corresponding registers (either in PCI configuration space or memory-mapped IBASE) to configure the legacy 8259 IRQ vector mapping. Refactor current Queensbay PIRQ routing support using device tree and move it to a common place, so that we can easily add PIRQ routing support on a new platform.
Signed-off-by: Bin Meng bmeng.cn@gmail.com ---
arch/x86/cpu/Makefile | 2 +- arch/x86/cpu/irq.c | 221 +++++++++++++++++++++ arch/x86/cpu/queensbay/Makefile | 2 +- arch/x86/cpu/queensbay/irq.c | 242 ----------------------- arch/x86/cpu/queensbay/tnc.c | 39 +++- arch/x86/dts/crownbay.dts | 54 +++++ arch/x86/include/asm/arch-queensbay/irq.h | 55 ------ arch/x86/include/asm/irq.h | 105 ++++++++++ include/dt-bindings/interrupt-router/intel-irq.h | 29 +++ include/fdtdec.h | 1 + lib/fdtdec.c | 1 + 11 files changed, 451 insertions(+), 300 deletions(-) create mode 100644 arch/x86/cpu/irq.c delete mode 100644 arch/x86/cpu/queensbay/irq.c delete mode 100644 arch/x86/include/asm/arch-queensbay/irq.h create mode 100644 arch/x86/include/asm/irq.h create mode 100644 include/dt-bindings/interrupt-router/intel-irq.h
diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile index 307545a..7ff05e6 100644 --- a/arch/x86/cpu/Makefile +++ b/arch/x86/cpu/Makefile @@ -19,7 +19,7 @@ obj-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ivybridge/ obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/ obj-$(CONFIG_INTEL_QUARK) += quark/ obj-$(CONFIG_INTEL_QUEENSBAY) += queensbay/ -obj-y += lapic.o +obj-y += irq.o lapic.o obj-$(CONFIG_SMP) += mp_init.o obj-y += mtrr.o obj-$(CONFIG_PCI) += pci.o diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c new file mode 100644 index 0000000..32dc6f2 --- /dev/null +++ b/arch/x86/cpu/irq.c @@ -0,0 +1,221 @@ +/* + * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <fdtdec.h> +#include <malloc.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/pci.h> +#include <asm/pirq_routing.h> + +DECLARE_GLOBAL_DATA_PTR; + +static struct irq_router irq_router; +static struct irq_routing_table *pirq_routing_table; + +bool pirq_check_irq_routed(int link, u8 irq) +{ + u8 pirq; + int base = irq_router.link_base; + + if (irq_router.config == PIRQ_VIA_PCI) + pirq = x86_pci_read_config8(irq_router.bdf, + LINK_N2V(link, base)); + else + pirq = readb(irq_router.ibase + LINK_N2V(link, base)); + + pirq &= 0xf; + + /* IRQ# 0/1/2/8/13 are reserved */ + if (pirq < 3 || pirq == 8 || pirq == 13) + return false; + + return pirq == irq ? true : false; +} + +int pirq_translate_link(int link) +{ + return LINK_V2N(link, irq_router.link_base); +} + +void pirq_assign_irq(int link, u8 irq) +{ + int base = irq_router.link_base; + + /* IRQ# 0/1/2/8/13 are reserved */ + if (irq < 3 || irq == 8 || irq == 13) + return; + + if (irq_router.config == PIRQ_VIA_PCI) + x86_pci_write_config8(irq_router.bdf, + LINK_N2V(link, base), irq); + else + writeb(irq, irq_router.ibase + LINK_N2V(link, base)); +} + +static inline void fill_irq_info(struct irq_info **slotp, int *entries, u8 bus, + u8 device, u8 func, u8 pin, u8 pirq) +{ + struct irq_info *slot = *slotp; + + slot->bus = bus; + slot->devfn = (device << 3) | func; + slot->irq[pin - 1].link = LINK_N2V(pirq, irq_router.link_base); + slot->irq[pin - 1].bitmap = irq_router.irq_mask; + (*entries)++; + (*slotp)++; +} + +__weak int board_fill_irq_info(struct irq_info *slot) +{ + return 0; +} + +__weak void cpu_irq_init(void) +{ + return; +} + +static int create_pirq_routing_table(void) +{ + const void *blob = gd->fdt_blob; + struct fdt_pci_addr addr; + int node; + int len, count; + const u32 *cell; + struct irq_routing_table *rt; + struct irq_info *slot; + int irq_entries = 0; + int i; + int ret; + + node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_IRQ_ROUTER); + if (node < 0) { + debug("%s: Cannot find irq router node\n", __func__); + return -EINVAL; + } + + ret = fdtdec_get_pci_addr(blob, node, FDT_PCI_SPACE_CONFIG, + "reg", &addr); + if (ret) + return ret; + + /* extract the bdf from fdt_pci_addr */ + irq_router.bdf = addr.phys_hi & 0xffff00; + + ret = fdt_find_string(blob, node, "intel,pirq-config", "pci"); + if (!ret) { + irq_router.config = PIRQ_VIA_PCI; + } else { + ret = fdt_find_string(blob, node, "intel,pirq-config", "ibase"); + if (!ret) + irq_router.config = PIRQ_VIA_IBASE; + else + return -EINVAL; + } + + ret = fdtdec_get_int_array(blob, node, "intel,pirq-link", + &irq_router.link_base, 1); + if (ret) + return ret; + + irq_router.irq_mask = fdtdec_get_int(blob, node, + "intel,pirq-mask", PIRQ_BITMAP); + + if (irq_router.config == PIRQ_VIA_IBASE) { + int ibase_off; + + ibase_off = fdtdec_get_int(blob, node, "intel,ibase-offset", 0); + if (!ibase_off) + return -EINVAL; + + /* + * Here we assume that the IBASE register has already been + * properly configured by U-Boot before. + * + * By 'valid' we mean: + * 1) a valid memory space carved within system memory space + * assigned to IBASE register block. + * 2) memory range decoding is enabled. + * Hence we don't do any santify test here. + */ + irq_router.ibase = x86_pci_read_config32(irq_router.bdf, + ibase_off); + irq_router.ibase &= ~0xf; + } + + cell = fdt_getprop(blob, node, "intel,pirq-routing", &len); + if (!cell) + return -EINVAL; + + if ((len % sizeof(struct pirq_routing)) == 0) + count = len / sizeof(struct pirq_routing); + else + return -EINVAL; + + rt = malloc(sizeof(struct irq_routing_table)); + if (!rt) + return -ENOMEM; + memset((char *)rt, 0, sizeof(struct irq_routing_table)); + + /* Populate the PIRQ table fields */ + rt->signature = PIRQ_SIGNATURE; + rt->version = PIRQ_VERSION; + rt->rtr_bus = 0; + rt->rtr_devfn = (PCI_DEV(irq_router.bdf) << 3) | + PCI_FUNC(irq_router.bdf); + rt->rtr_vendor = PCI_VENDOR_ID_INTEL; + rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31; + + slot = rt->slots; + + /* Now fill in the irq_info entries in the PIRQ table */ + for (i = 0; i < count; i++) { + struct pirq_routing pr; + + pr.bdf = fdt_addr_to_cpu(cell[0]); + pr.pin = fdt_addr_to_cpu(cell[1]); + pr.pirq = fdt_addr_to_cpu(cell[2]); + + debug("irq_info %d: b.d.f %x.%x.%x INT%c PIRQ%c\n", + i, PCI_BUS(pr.bdf), PCI_DEV(pr.bdf), + PCI_FUNC(pr.bdf), 'A' + pr.pin - 1, + 'A' + pr.pirq); + fill_irq_info(&slot, &irq_entries, PCI_BUS(pr.bdf), + PCI_DEV(pr.bdf), PCI_FUNC(pr.bdf), + pr.pin, pr.pirq); + cell += sizeof(struct pirq_routing) / sizeof(u32); + } + + /* Call board-specific routine to fill in add-in card's irq info */ + irq_entries += board_fill_irq_info(slot); + + rt->size = irq_entries * sizeof(struct irq_info) + 32; + + pirq_routing_table = rt; + + return 0; +} + +void pirq_init(void) +{ + cpu_irq_init(); + + if (create_pirq_routing_table()) { + debug("Failed to create pirq routing table\n"); + } else { + /* Route PIRQ */ + pirq_route_irqs(pirq_routing_table->slots, + get_irq_slot_count(pirq_routing_table)); + } +} + +u32 write_pirq_routing_table(u32 addr) +{ + return copy_pirq_routing_table(addr, pirq_routing_table); +} diff --git a/arch/x86/cpu/queensbay/Makefile b/arch/x86/cpu/queensbay/Makefile index 4599a48..d8761fd 100644 --- a/arch/x86/cpu/queensbay/Makefile +++ b/arch/x86/cpu/queensbay/Makefile @@ -5,5 +5,5 @@ #
obj-y += fsp_configs.o -obj-y += irq.o tnc.o topcliff.o +obj-y += tnc.o topcliff.o obj-$(CONFIG_PCI) += tnc_pci.o diff --git a/arch/x86/cpu/queensbay/irq.c b/arch/x86/cpu/queensbay/irq.c deleted file mode 100644 index faf9515..0000000 --- a/arch/x86/cpu/queensbay/irq.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <errno.h> -#include <malloc.h> -#include <asm/io.h> -#include <asm/pci.h> -#include <asm/post.h> -#include <asm/processor.h> -#include <asm/pirq_routing.h> -#include <asm/arch/device.h> -#include <asm/arch/tnc.h> -#include <asm/arch/irq.h> - -static struct irq_routing_table *pirq_routing_table; - -bool pirq_check_irq_routed(int link, u8 irq) -{ - u8 pirq; - - pirq = x86_pci_read_config8(TNC_LPC, LINK_N2V(link)); - pirq &= 0xf; - - /* IRQ# 0/1/2/8/13 are reserved */ - if (pirq < 3 || pirq == 8 || pirq == 13) - return false; - - return pirq == irq ? true : false; -} - -int pirq_translate_link(int link) -{ - return LINK_V2N(link); -} - -void pirq_assign_irq(int link, u8 irq) -{ - /* IRQ# 0/1/2/8/13 are reserved */ - if (irq < 3 || irq == 8 || irq == 13) - return; - - x86_pci_write_config8(TNC_LPC, LINK_N2V(link), irq); -} - -static inline void fill_irq_info(struct irq_info **slotp, int *entries, u8 bus, - u8 device, u8 func, u8 pin, u8 pirq) -{ - struct irq_info *slot = *slotp; - - slot->bus = bus; - slot->devfn = (device << 3) | func; - slot->irq[pin - 1].link = LINK_N2V(pirq); - slot->irq[pin - 1].bitmap = PIRQ_BITMAP; - (*entries)++; - (*slotp)++; -} - -/* PCIe port downstream INTx swizzle */ -static inline u8 pin_swizzle(u8 pin, int port) -{ - return (pin + port) % 4; -} - -__weak int board_fill_irq_info(struct irq_info *slot) -{ - return 0; -} - -static int create_pirq_routing_table(void) -{ - struct irq_routing_table *rt; - struct irq_info *slot; - int irq_entries = 0; - pci_dev_t tcf_bdf; - u8 tcf_bus, bus; - int i; - - rt = malloc(sizeof(struct irq_routing_table)); - if (!rt) - return -ENOMEM; - memset((char *)rt, 0, sizeof(struct irq_routing_table)); - - /* Populate the PIRQ table fields */ - rt->signature = PIRQ_SIGNATURE; - rt->version = PIRQ_VERSION; - rt->rtr_bus = 0; - rt->rtr_devfn = (TNC_LPC_DEV << 3) | TNC_LPC_FUNC; - rt->rtr_vendor = PCI_VENDOR_ID_INTEL; - rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31; - - slot = rt->slots; - - /* - * Now fill in the irq_info entries in the PIRQ table - * - * We start from internal TunnelCreek PCI devices first, then - * followed by all the 4 PCIe ports downstream devices, including - * the Queensbay platform Topcliff chipset devices. - */ - fill_irq_info(&slot, &irq_entries, 0, TNC_IGD_DEV, - TNC_IGD_FUNC, INTA, PIRQE); - fill_irq_info(&slot, &irq_entries, 0, TNC_SDVO_DEV, - TNC_SDVO_FUNC, INTA, PIRQF); - fill_irq_info(&slot, &irq_entries, 0, TNC_HDA_DEV, - TNC_HDA_FUNC, INTA, PIRQG); - fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE0_DEV, - TNC_PCIE0_FUNC, INTA, PIRQE); - fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE1_DEV, - TNC_PCIE1_FUNC, INTA, PIRQF); - fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE2_DEV, - TNC_PCIE2_FUNC, INTA, PIRQG); - fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE3_DEV, - TNC_PCIE3_FUNC, INTA, PIRQH); - - /* Check which PCIe port the Topcliff chipset is connected to */ - tcf_bdf = pci_find_device(PCI_VENDOR_ID_INTEL, 0x8800, 0); - tcf_bus = PCI_BUS(tcf_bdf); - for (i = 0; i < 4; i++) { - bus = x86_pci_read_config8(PCI_BDF(0, TNC_PCIE0_DEV + i, 0), - PCI_SECONDARY_BUS); - if (bus == tcf_bus) - break; - } - - /* Fill in the Topcliff chipset devices' irq info */ - if (i < 4) { - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_PCIE_PORT_DEV, - TCF_PCIE_PORT_FUNC, INTA, pin_swizzle(PIRQA, i)); - - tcf_bus++; - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0, - TCF_GBE_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0, - TCF_GPIO_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2, - TCF_USB1_OHCI0_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2, - TCF_USB1_OHCI1_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2, - TCF_USB1_OHCI2_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2, - TCF_USB1_EHCI_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2, - TCF_USB_DEVICE_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4, - TCF_SDIO0_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4, - TCF_SDIO1_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_6, - TCF_SATA_FUNC, INTD, pin_swizzle(PIRQD, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8, - TCF_USB2_OHCI0_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8, - TCF_USB2_OHCI1_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8, - TCF_USB2_OHCI2_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8, - TCF_USB2_EHCI_FUNC, INTA, pin_swizzle(PIRQA, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10, - TCF_DMA1_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10, - TCF_UART0_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10, - TCF_UART1_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10, - TCF_UART2_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10, - TCF_UART3_FUNC, INTB, pin_swizzle(PIRQB, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12, - TCF_DMA2_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12, - TCF_SPI_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12, - TCF_I2C_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12, - TCF_CAN_FUNC, INTC, pin_swizzle(PIRQC, i)); - fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12, - TCF_1588_FUNC, INTC, pin_swizzle(PIRQC, i)); - } - - /* Call board-specific routine to fill in add-in card's irq info */ - irq_entries += board_fill_irq_info(slot); - - rt->size = irq_entries * sizeof(struct irq_info) + 32; - - pirq_routing_table = rt; - - return 0; -} - -void pirq_init(void) -{ - struct tnc_rcba *rcba; - u32 base; - - base = x86_pci_read_config32(TNC_LPC, LPC_RCBA); - base &= ~MEM_BAR_EN; - rcba = (struct tnc_rcba *)base; - - /* Make sure all internal PCI devices are using INTA */ - writel(INTA, &rcba->d02ip); - writel(INTA, &rcba->d03ip); - writel(INTA, &rcba->d27ip); - writel(INTA, &rcba->d31ip); - writel(INTA, &rcba->d23ip); - writel(INTA, &rcba->d24ip); - writel(INTA, &rcba->d25ip); - writel(INTA, &rcba->d26ip); - - /* - * Route TunnelCreek PCI device interrupt pin to PIRQ - * - * Since PCIe downstream ports received INTx are routed to PIRQ - * A/B/C/D directly and not configurable, we route internal PCI - * device's INTx to PIRQ E/F/G/H. - */ - writew(PIRQE, &rcba->d02ir); - writew(PIRQF, &rcba->d03ir); - writew(PIRQG, &rcba->d27ir); - writew(PIRQH, &rcba->d31ir); - writew(PIRQE, &rcba->d23ir); - writew(PIRQF, &rcba->d24ir); - writew(PIRQG, &rcba->d25ir); - writew(PIRQH, &rcba->d26ir); - - if (create_pirq_routing_table()) { - debug("Failed to create pirq routing table\n"); - } else { - /* Route PIRQ */ - pirq_route_irqs(pirq_routing_table->slots, - get_irq_slot_count(pirq_routing_table)); - } -} - -u32 write_pirq_routing_table(u32 addr) -{ - return copy_pirq_routing_table(addr, pirq_routing_table); -} diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c index b46a7e9..873de7b 100644 --- a/arch/x86/cpu/queensbay/tnc.c +++ b/arch/x86/cpu/queensbay/tnc.c @@ -6,10 +6,11 @@
#include <common.h> #include <asm/io.h> +#include <asm/irq.h> #include <asm/pci.h> #include <asm/post.h> #include <asm/arch/device.h> -#include <asm/arch/irq.h> +#include <asm/arch/tnc.h> #include <asm/fsp/fsp_support.h> #include <asm/processor.h>
@@ -45,6 +46,42 @@ int arch_cpu_init(void) return 0; }
+void cpu_irq_init(void) +{ + struct tnc_rcba *rcba; + u32 base; + + base = x86_pci_read_config32(TNC_LPC, LPC_RCBA); + base &= ~MEM_BAR_EN; + rcba = (struct tnc_rcba *)base; + + /* Make sure all internal PCI devices are using INTA */ + writel(INTA, &rcba->d02ip); + writel(INTA, &rcba->d03ip); + writel(INTA, &rcba->d27ip); + writel(INTA, &rcba->d31ip); + writel(INTA, &rcba->d23ip); + writel(INTA, &rcba->d24ip); + writel(INTA, &rcba->d25ip); + writel(INTA, &rcba->d26ip); + + /* + * Route TunnelCreek PCI device interrupt pin to PIRQ + * + * Since PCIe downstream ports received INTx are routed to PIRQ + * A/B/C/D directly and not configurable, we route internal PCI + * device's INTx to PIRQ E/F/G/H. + */ + writew(PIRQE, &rcba->d02ir); + writew(PIRQF, &rcba->d03ir); + writew(PIRQG, &rcba->d27ir); + writew(PIRQH, &rcba->d31ir); + writew(PIRQE, &rcba->d23ir); + writew(PIRQF, &rcba->d24ir); + writew(PIRQG, &rcba->d25ir); + writew(PIRQH, &rcba->d26ir); +} + int arch_misc_init(void) { pirq_init(); diff --git a/arch/x86/dts/crownbay.dts b/arch/x86/dts/crownbay.dts index fbdeade..d68efda 100644 --- a/arch/x86/dts/crownbay.dts +++ b/arch/x86/dts/crownbay.dts @@ -6,6 +6,8 @@
/dts-v1/;
+#include <dt-bindings/interrupt-router/intel-irq.h> + /include/ "skeleton.dtsi" /include/ "serial.dtsi"
@@ -135,6 +137,58 @@ }; }; }; + + irq-router@1f,0 { + reg = <0x0000f800 0 0 0 0>; + compatible = "intel,irq-router"; + intel,pirq-config = "pci"; + intel,pirq-link = <0x60 8>; + intel,pirq-mask = <0xdee0>; + intel,pirq-routing = < + /* TunnelCreek PCI devices */ + PCI_BDF(0, 2, 0) INTA PIRQE + PCI_BDF(0, 3, 0) INTA PIRQF + PCI_BDF(0, 23, 0) INTA PIRQE + PCI_BDF(0, 24, 0) INTA PIRQF + PCI_BDF(0, 25, 0) INTA PIRQG + PCI_BDF(0, 26, 0) INTA PIRQH + PCI_BDF(0, 27, 0) INTA PIRQG + /* + * Topcliff PCI devices + * + * Note on the Crown Bay board, Topcliff chipset + * is connected to TunnelCreek PCIe port 0, so + * its bus number is 1 for its PCIe port and 2 + * for its PCI devices per U-Boot currnet PCI + * bus enumeration algorithm. + */ + PCI_BDF(1, 0, 0) INTA PIRQA + PCI_BDF(2, 0, 1) INTA PIRQA + PCI_BDF(2, 0, 2) INTA PIRQA + PCI_BDF(2, 2, 0) INTB PIRQB + PCI_BDF(2, 2, 1) INTB PIRQB + PCI_BDF(2, 2, 2) INTB PIRQB + PCI_BDF(2, 2, 3) INTB PIRQB + PCI_BDF(2, 2, 4) INTB PIRQB + PCI_BDF(2, 4, 0) INTC PIRQC + PCI_BDF(2, 4, 1) INTC PIRQC + PCI_BDF(2, 6, 0) INTD PIRQD + PCI_BDF(2, 8, 0) INTA PIRQA + PCI_BDF(2, 8, 1) INTA PIRQA + PCI_BDF(2, 8, 2) INTA PIRQA + PCI_BDF(2, 8, 3) INTA PIRQA + PCI_BDF(2, 10, 0) INTB PIRQB + PCI_BDF(2, 10, 1) INTB PIRQB + PCI_BDF(2, 10, 2) INTB PIRQB + PCI_BDF(2, 10, 3) INTB PIRQB + PCI_BDF(2, 10, 4) INTB PIRQB + PCI_BDF(2, 12, 0) INTC PIRQC + PCI_BDF(2, 12, 1) INTC PIRQC + PCI_BDF(2, 12, 2) INTC PIRQC + PCI_BDF(2, 12, 3) INTC PIRQC + PCI_BDF(2, 12, 4) INTC PIRQC + >; + }; };
}; diff --git a/arch/x86/include/asm/arch-queensbay/irq.h b/arch/x86/include/asm/arch-queensbay/irq.h deleted file mode 100644 index e7f8616..0000000 --- a/arch/x86/include/asm/arch-queensbay/irq.h +++ /dev/null @@ -1,55 +0,0 @@ -/* - * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#ifndef _ARCH_IRQ_H_ -#define _ARCH_IRQ_H_ - -enum pci_int_pin { - INTX, - INTA, - INTB, - INTC, - INTD -}; - -enum pirq_pin { - PIRQA, - PIRQB, - PIRQC, - PIRQD, - PIRQE, - PIRQF, - PIRQG, - PIRQH -}; - -/* PIRQ link number and value conversion */ -#define LINK_V2N(link) (link - 0x60) -#define LINK_N2V(link) (link + 0x60) - -#define PIRQ_BITMAP 0xdee0 - -struct irq_info; - -/** - * board_fill_irq_info() - Board-specific irq_info fill routine - * - * This fills the irq_info table for any board-specific add-in cards. - * - * @slot: pointer to the struct irq_info that is to be filled in - * @return: number of entries were written to the struct irq_info - */ -int board_fill_irq_info(struct irq_info *slot); - -/** - * pirq_init() - Initialize platform PIRQ routing - * - * This initializes the PIRQ routing on the platform and configures all PCI - * devices' interrupt line register to a working IRQ number on the 8259 PIC. - */ -void pirq_init(void); - -#endif /* _ARCH_IRQ_H_ */ diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h new file mode 100644 index 0000000..a7ad462 --- /dev/null +++ b/arch/x86/include/asm/irq.h @@ -0,0 +1,105 @@ +/* + * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ARCH_IRQ_H_ +#define _ARCH_IRQ_H_ + +enum pci_int_pin { + INTX, + INTA, + INTB, + INTC, + INTD +}; + +enum pirq_pin { + PIRQA, + PIRQB, + PIRQC, + PIRQD, + PIRQE, + PIRQF, + PIRQG, + PIRQH +}; + +/** + * Intel interrupt router configuration mechanism + * + * There are two known ways of Intel interrupt router configuration mechanism + * so far. On most cases, the IRQ routing configuraiton is controlled by PCI + * configuraiton registers on the legacy bridge, normally PCI BDF(0, 31, 0). + * On some newer platforms like BayTrail and Braswell, the IRQ routing is now + * in the IBASE register block where IBASE is memory-mapped. + */ +enum pirq_config { + PIRQ_VIA_PCI, + PIRQ_VIA_IBASE +}; + +/** + * Intel interrupt router control block + * + * Its members' value will be filled in based on device tree's input. + * + * @config: PIRQ_VIA_PCI or PIRQ_VIA_IBASE + * @link_base: link value base number + * @irq_mask: IRQ mask reprenting the 16 IRQs in 8259, bit N is 1 means + * IRQ N is available to be routed + * @lb_bdf: irq router's PCI bus/device/function number encoding + * @ibase: IBASE register block base address + */ +struct irq_router { + int config; + u32 link_base; + u16 irq_mask; + u32 bdf; + u32 ibase; +}; + +struct pirq_routing { + int bdf; + int pin; + int pirq; +}; + +/* PIRQ link number and value conversion */ +#define LINK_V2N(link, base) (link - base) +#define LINK_N2V(link, base) (link + base) + +#define PIRQ_BITMAP 0xdef8 + +struct irq_info; + +/** + * board_fill_irq_info() - Board-specific irq_info fill routine + * + * This fills the irq_info table for any board-specific add-in cards. + * + * @slot: pointer to the struct irq_info that is to be filled in + * @return: number of entries were written to the struct irq_info + */ +int board_fill_irq_info(struct irq_info *slot); + +/** + * cpu_irq_init() - Initialize CPU IRQ routing + * + * This initializes some platform-specific registers related to IRQ routing, + * like configuring internal PCI devices to use which PCI interrupt pin, + * and which PCI interrupt pin is mapped to which PIRQ line. Note on some + * platforms, such IRQ routing might be hard-coded thus cannot configure. + */ +void cpu_irq_init(void); + +/** + * pirq_init() - Initialize platform PIRQ routing + * + * This initializes the PIRQ routing on the platform and configures all PCI + * devices' interrupt line register to a working IRQ number on the 8259 PIC. + */ +void pirq_init(void); + +#endif /* _ARCH_IRQ_H_ */ diff --git a/include/dt-bindings/interrupt-router/intel-irq.h b/include/dt-bindings/interrupt-router/intel-irq.h new file mode 100644 index 0000000..41077ef --- /dev/null +++ b/include/dt-bindings/interrupt-router/intel-irq.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _DT_BINDINGS_INTEL_IRQ_H_ +#define _DT_BINDINGS_INTEL_IRQ_H_ + +/* PCI interrupt pin */ +#define INTA 1 +#define INTB 2 +#define INTC 3 +#define INTD 4 + +/* PIRQs */ +#define PIRQA 0 +#define PIRQB 1 +#define PIRQC 2 +#define PIRQD 3 +#define PIRQE 4 +#define PIRQF 5 +#define PIRQG 6 +#define PIRQH 7 + +/* PCI bdf encoding */ +#define PCI_BDF(b, d, f) ((b) << 16 | (d) << 11 | (f) << 8) + +#endif /* _DT_BINDINGS_INTEL_IRQ_H_ */ diff --git a/include/fdtdec.h b/include/fdtdec.h index 6590470..dc1c85b 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -177,6 +177,7 @@ enum fdt_compat_id { COMPAT_INTEL_QRK_MRC, /* Intel Quark MRC */ COMPAT_SOCIONEXT_XHCI, /* Socionext UniPhier xHCI */ COMPAT_INTEL_PCH, /* Intel PCH */ + COMPAT_INTEL_IRQ_ROUTER, /* Intel Interrupt Router */
COMPAT_COUNT, }; diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 80b897a..22d1e39 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -76,6 +76,7 @@ static const char * const compat_names[COMPAT_COUNT] = { COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), + COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), };
const char *fdtdec_get_compatible(enum fdt_compat_id id)