diff options
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/hw_irq.h | 9 | ||||
| -rw-r--r-- | arch/x86/include/asm/irq_remapping.h | 6 | ||||
| -rw-r--r-- | arch/x86/include/asm/msi.h | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/msi.c | 141 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/vector.c | 2 | ||||
| -rw-r--r-- | drivers/iommu/irq_remapping.c | 1 |
7 files changed, 94 insertions, 73 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e75a96c..26e0665 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -914,6 +914,7 @@ config X86_LOCAL_APIC depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ select IRQ_DOMAIN_HIERARCHY + select PCI_MSI_IRQ_DOMAIN if PCI_MSI config X86_IO_APIC def_bool y diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 75a97a5..05829e9 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -110,9 +110,10 @@ struct irq_2_irte { }; #endif /* CONFIG_IRQ_REMAP */ +struct irq_domain; + #ifdef CONFIG_X86_LOCAL_APIC struct irq_data; -struct irq_domain; struct pci_dev; struct msi_desc; @@ -214,6 +215,12 @@ static inline void lock_vector_lock(void) {} static inline void unlock_vector_lock(void) {} #endif /* CONFIG_X86_LOCAL_APIC */ +#ifdef CONFIG_PCI_MSI +extern void arch_init_msi_domain(struct irq_domain *domain); +#else +static inline void arch_init_msi_domain(struct irq_domain *domain) { } +#endif + /* Statistics */ extern atomic_t irq_err_count; extern atomic_t irq_mis_count; diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index 0cd6195..0d3bbd0 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -66,11 +66,7 @@ irq_remapping_get_irq_domain(struct irq_alloc_info *info); extern void irq_remapping_print_chip(struct irq_data *data, struct seq_file *p); /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ -static inline struct irq_domain * -arch_create_msi_irq_domain(struct irq_domain *parent) -{ - return NULL; -} +extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent); /* Get parent irqdomain for interrupt remapping irqdomain */ static inline struct irq_domain *arch_get_ir_parent_domain(void) diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h new file mode 100644 index 0000000..93724cc --- /dev/null +++ b/arch/x86/include/asm/msi.h @@ -0,0 +1,7 @@ +#ifndef _ASM_X86_MSI_H +#define _ASM_X86_MSI_H +#include <asm/hw_irq.h> + +typedef struct irq_alloc_info msi_alloc_info_t; + +#endif /* _ASM_X86_MSI_H */ diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index 10d9ae8..c426cd5 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -3,6 +3,8 @@ * * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo * Moved from arch/x86/kernel/apic/io_apic.c. + * Jiang Liu <jiang.liu@linux.intel.com> + * Convert to hierarchical irqdomain * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -21,6 +23,8 @@ #include <asm/apic.h> #include <asm/irq_remapping.h> +static struct irq_domain *msi_default_domain; + void native_compose_msi_msg(struct pci_dev *pdev, unsigned int irq, unsigned int dest, struct msi_msg *msg, u8 hpet_id) @@ -114,102 +118,107 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, return 0; } -static int -msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) -{ - struct irq_cfg *cfg = irqd_cfg(data); - struct msi_msg msg; - unsigned int dest; - int ret; - - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; - - __get_cached_msi_msg(data->msi_desc, &msg); - - msg.data &= ~MSI_DATA_VECTOR_MASK; - msg.data |= MSI_DATA_VECTOR(cfg->vector); - msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; - msg.address_lo |= MSI_ADDR_DEST_ID(dest); - - __pci_write_msi_msg(data->msi_desc, &msg); - - return IRQ_SET_MASK_OK_NOCOPY; -} - /* * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, * which implement the MSI or MSI-X Capability Structure. */ -static struct irq_chip msi_chip = { +static struct irq_chip pci_msi_controller = { .name = "PCI-MSI", .irq_unmask = pci_msi_unmask_irq, .irq_mask = pci_msi_mask_irq, - .irq_ack = apic_ack_edge, - .irq_set_affinity = msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, + .irq_ack = irq_chip_ack_parent, + .irq_set_affinity = msi_domain_set_affinity, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_print_chip = irq_remapping_print_chip, + .irq_compose_msi_msg = irq_msi_compose_msg, + .irq_write_msi_msg = pci_msi_domain_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE, }; -int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, - unsigned int irq_base, unsigned int irq_offset) +int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { - struct irq_chip *chip = &msi_chip; - struct msi_msg msg; - unsigned int irq = irq_base + irq_offset; - int ret; + struct irq_domain *domain; + struct irq_alloc_info info; - ret = msi_compose_msg(dev, irq, &msg, -1); - if (ret < 0) - return ret; + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_MSI; + info.msi_dev = dev; - irq_set_msi_desc_off(irq_base, irq_offset, msidesc); + domain = irq_remapping_get_irq_domain(&info); + if (domain == NULL) + domain = msi_default_domain; + if (domain == NULL) + return -ENOSYS; - /* - * MSI-X message is written per-IRQ, the offset is always 0. - * MSI message denotes a contiguous group of IRQs, written for 0th IRQ. - */ - if (!irq_offset) - pci_write_msi_msg(irq, &msg); + return pci_msi_domain_alloc_irqs(domain, dev, nvec, type); +} - setup_remapped_irq(irq, irq_cfg(irq), chip); +void native_teardown_msi_irq(unsigned int irq) +{ + irq_domain_free_irqs(irq, 1); +} - irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); +static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) +{ + return arg->msi_hwirq; +} - dev_dbg(&dev->dev, "irq %d for MSI/MSI-X\n", irq); +static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, + int nvec, msi_alloc_info_t *arg) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct msi_desc *desc = first_pci_msi_entry(pdev); + + init_irq_alloc_info(arg, NULL); + arg->msi_dev = pdev; + if (desc->msi_attrib.is_msix) { + arg->type = X86_IRQ_ALLOC_TYPE_MSIX; + } else { + arg->type = X86_IRQ_ALLOC_TYPE_MSI; + arg->flags |= X86_IRQ_ALLOC_CONTIGUOUS_VECTORS; + } return 0; } -int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +static void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) { - struct msi_desc *msidesc; - int irq, ret; + arg->msi_hwirq = pci_msi_domain_calc_hwirq(arg->msi_dev, desc); +} - /* Multiple MSI vectors only supported with interrupt remapping */ - if (type == PCI_CAP_ID_MSI && nvec > 1) - return 1; +static struct msi_domain_ops pci_msi_domain_ops = { + .get_hwirq = pci_msi_get_hwirq, + .msi_prepare = pci_msi_prepare, + .set_desc = pci_msi_set_desc, +}; - list_for_each_entry(msidesc, &dev->msi_list, list) { - irq = irq_domain_alloc_irqs(NULL, 1, NUMA_NO_NODE, NULL); - if (irq <= 0) - return -ENOSPC; +static struct msi_domain_info pci_msi_domain_info = { + .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX, + .ops = &pci_msi_domain_ops, + .chip = &pci_msi_controller, + .handler = handle_edge_irq, + .handler_name = "edge", +}; - ret = setup_msi_irq(dev, msidesc, irq, 0); - if (ret < 0) { - irq_domain_free_irqs(irq, 1); - return ret; - } +void arch_init_msi_domain(struct irq_domain *parent) +{ + if (disable_apic) + return; - } - return 0; + msi_default_domain = pci_msi_create_irq_domain(NULL, + &pci_msi_domain_info, parent); + if (!msi_default_domain) + pr_warn("failed to initialize irqdomain for MSI/MSI-x.\n"); } -void native_teardown_msi_irq(unsigned int irq) +#ifdef CONFIG_IRQ_REMAP +struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent) { - irq_domain_free_irqs(irq, 1); + return msi_create_irq_domain(NULL, &pci_msi_domain_info, parent); } +#endif #ifdef CONFIG_DMAR_TABLE static int diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 6358d8d..a8d8289 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -364,6 +364,8 @@ int __init arch_early_irq_init(void) BUG_ON(x86_vector_domain == NULL); irq_set_default_host(x86_vector_domain); + arch_init_msi_domain(x86_vector_domain); + return arch_early_ioapic_init(); } diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index c306421..d77e371 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -170,7 +170,6 @@ static void __init irq_remapping_modify_x86_ops(void) x86_io_apic_ops.set_affinity = set_remapped_irq_affinity; x86_io_apic_ops.setup_entry = setup_ioapic_remapped_entry; x86_io_apic_ops.eoi_ioapic_pin = eoi_ioapic_pin_remapped; - x86_msi.setup_msi_irqs = irq_remapping_setup_msi_irqs; x86_msi.setup_hpet_msi = setup_hpet_msi_remapped; x86_msi.compose_msi_msg = compose_remapped_msi_msg; } |
