| /* |
| * MSI hooks for standard x86 apic |
| */ |
| |
| #include <linux/pci.h> |
| #include <linux/irq.h> |
| #include <linux/msi.h> |
| #include <linux/dmar.h> |
| #include <asm/smp.h> |
| #include <asm/msidef.h> |
| |
| static struct irq_chip ia64_msi_chip; |
| |
| #ifdef CONFIG_SMP |
| static int ia64_set_msi_irq_affinity(struct irq_data *idata, |
| const cpumask_t *cpu_mask, bool force) |
| { |
| struct msi_msg msg; |
| u32 addr, data; |
| int cpu = cpumask_first_and(cpu_mask, cpu_online_mask); |
| unsigned int irq = idata->irq; |
| |
| if (irq_prepare_move(irq, cpu)) |
| return -1; |
| |
| __get_cached_msi_msg(idata->msi_desc, &msg); |
| |
| addr = msg.address_lo; |
| addr &= MSI_ADDR_DEST_ID_MASK; |
| addr |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu)); |
| msg.address_lo = addr; |
| |
| data = msg.data; |
| data &= MSI_DATA_VECTOR_MASK; |
| data |= MSI_DATA_VECTOR(irq_to_vector(irq)); |
| msg.data = data; |
| |
| write_msi_msg(irq, &msg); |
| cpumask_copy(idata->affinity, cpumask_of(cpu)); |
| |
| return 0; |
| } |
| #endif /* CONFIG_SMP */ |
| |
| int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) |
| { |
| struct msi_msg msg; |
| unsigned long dest_phys_id; |
| int irq, vector; |
| cpumask_t mask; |
| |
| irq = create_irq(); |
| if (irq < 0) |
| return irq; |
| |
| irq_set_msi_desc(irq, desc); |
| cpumask_and(&mask, &(irq_to_domain(irq)), cpu_online_mask); |
| dest_phys_id = cpu_physical_id(first_cpu(mask)); |
| vector = irq_to_vector(irq); |
| |
| msg.address_hi = 0; |
| msg.address_lo = |
| MSI_ADDR_HEADER | |
| MSI_ADDR_DEST_MODE_PHYS | |
| MSI_ADDR_REDIRECTION_CPU | |
| MSI_ADDR_DEST_ID_CPU(dest_phys_id); |
| |
| msg.data = |
| MSI_DATA_TRIGGER_EDGE | |
| MSI_DATA_LEVEL_ASSERT | |
| MSI_DATA_DELIVERY_FIXED | |
| MSI_DATA_VECTOR(vector); |
| |
| write_msi_msg(irq, &msg); |
| irq_set_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq); |
| |
| return 0; |
| } |
| |
| void ia64_teardown_msi_irq(unsigned int irq) |
| { |
| destroy_irq(irq); |
| } |
| |
| static void ia64_ack_msi_irq(struct irq_data *data) |
| { |
| irq_complete_move(data->irq); |
| irq_move_irq(data); |
| ia64_eoi(); |
| } |
| |
| static int ia64_msi_retrigger_irq(struct irq_data *data) |
| { |
| unsigned int vector = irq_to_vector(data->irq); |
| ia64_resend_irq(vector); |
| |
| return 1; |
| } |
| |
| /* |
| * Generic ops used on most IA64 platforms. |
| */ |
| static struct irq_chip ia64_msi_chip = { |
| .name = "PCI-MSI", |
| .irq_mask = mask_msi_irq, |
| .irq_unmask = unmask_msi_irq, |
| .irq_ack = ia64_ack_msi_irq, |
| #ifdef CONFIG_SMP |
| .irq_set_affinity = ia64_set_msi_irq_affinity, |
| #endif |
| .irq_retrigger = ia64_msi_retrigger_irq, |
| }; |
| |
| |
| int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) |
| { |
| if (platform_setup_msi_irq) |
| return platform_setup_msi_irq(pdev, desc); |
| |
| return ia64_setup_msi_irq(pdev, desc); |
| } |
| |
| void arch_teardown_msi_irq(unsigned int irq) |
| { |
| if (platform_teardown_msi_irq) |
| return platform_teardown_msi_irq(irq); |
| |
| return ia64_teardown_msi_irq(irq); |
| } |
| |
| #ifdef CONFIG_INTEL_IOMMU |
| #ifdef CONFIG_SMP |
| static int dmar_msi_set_affinity(struct irq_data *data, |
| const struct cpumask *mask, bool force) |
| { |
| unsigned int irq = data->irq; |
| struct irq_cfg *cfg = irq_cfg + irq; |
| struct msi_msg msg; |
| int cpu = cpumask_first_and(mask, cpu_online_mask); |
| |
| if (irq_prepare_move(irq, cpu)) |
| return -1; |
| |
| dmar_msi_read(irq, &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_CPU(cpu_physical_id(cpu)); |
| |
| dmar_msi_write(irq, &msg); |
| cpumask_copy(data->affinity, mask); |
| |
| return 0; |
| } |
| #endif /* CONFIG_SMP */ |
| |
| static struct irq_chip dmar_msi_type = { |
| .name = "DMAR_MSI", |
| .irq_unmask = dmar_msi_unmask, |
| .irq_mask = dmar_msi_mask, |
| .irq_ack = ia64_ack_msi_irq, |
| #ifdef CONFIG_SMP |
| .irq_set_affinity = dmar_msi_set_affinity, |
| #endif |
| .irq_retrigger = ia64_msi_retrigger_irq, |
| }; |
| |
| static int |
| msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) |
| { |
| struct irq_cfg *cfg = irq_cfg + irq; |
| unsigned dest; |
| cpumask_t mask; |
| |
| cpumask_and(&mask, &(irq_to_domain(irq)), cpu_online_mask); |
| dest = cpu_physical_id(first_cpu(mask)); |
| |
| msg->address_hi = 0; |
| msg->address_lo = |
| MSI_ADDR_HEADER | |
| MSI_ADDR_DEST_MODE_PHYS | |
| MSI_ADDR_REDIRECTION_CPU | |
| MSI_ADDR_DEST_ID_CPU(dest); |
| |
| msg->data = |
| MSI_DATA_TRIGGER_EDGE | |
| MSI_DATA_LEVEL_ASSERT | |
| MSI_DATA_DELIVERY_FIXED | |
| MSI_DATA_VECTOR(cfg->vector); |
| return 0; |
| } |
| |
| int arch_setup_dmar_msi(unsigned int irq) |
| { |
| int ret; |
| struct msi_msg msg; |
| |
| ret = msi_compose_msg(NULL, irq, &msg); |
| if (ret < 0) |
| return ret; |
| dmar_msi_write(irq, &msg); |
| irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, |
| "edge"); |
| return 0; |
| } |
| #endif /* CONFIG_INTEL_IOMMU */ |
| |