From 443809828cb5ee0eae09060aa8d4b42b79dd4e0b Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Mon, 27 Oct 2014 16:12:02 +0800 Subject: x86, irq: Move PCI MSI related code from io_apic.c into msi.c Create arch/x86/kernel/apic/msi.c to host MSI related code, preparing for enabling hierarchy irqdomain. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Bjorn Helgaas Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Cc: Rafael J. Wysocki Cc: Grant Likely Cc: Prarit Bhargava Link: http://lkml.kernel.org/r/1414397531-28254-12-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/Makefile | 1 + arch/x86/kernel/apic/io_apic.c | 272 --------------------------------------- arch/x86/kernel/apic/msi.c | 286 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 287 insertions(+), 272 deletions(-) create mode 100644 arch/x86/kernel/apic/msi.c (limited to 'arch/x86/kernel') diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile index 84299e5..aac3007 100644 --- a/arch/x86/kernel/apic/Makefile +++ b/arch/x86/kernel/apic/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o vector.o obj-y += hw_nmi.o obj-$(CONFIG_X86_IO_APIC) += io_apic.o +obj-$(CONFIG_PCI_MSI) += msi.o obj-$(CONFIG_SMP) += ipi.o ifeq ($(CONFIG_X86_64),y) diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 677044d..653fe21 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -32,15 +32,12 @@ #include #include #include -#include #include #include #include #include /* time_after() */ #include #include -#include -#include #include #include @@ -52,11 +49,9 @@ #include #include #include -#include #include #include #include -#include #include #include @@ -2456,273 +2451,6 @@ static int __init ioapic_init_ops(void) device_initcall(ioapic_init_ops); /* - * MSI message composition - */ -void native_compose_msi_msg(struct pci_dev *pdev, - unsigned int irq, unsigned int dest, - struct msi_msg *msg, u8 hpet_id) -{ - struct irq_cfg *cfg = irq_cfg(irq); - - msg->address_hi = MSI_ADDR_BASE_HI; - - if (x2apic_enabled()) - msg->address_hi |= MSI_ADDR_EXT_DEST_ID(dest); - - msg->address_lo = - MSI_ADDR_BASE_LO | - ((apic->irq_dest_mode == 0) ? - MSI_ADDR_DEST_MODE_PHYSICAL: - MSI_ADDR_DEST_MODE_LOGICAL) | - ((apic->irq_delivery_mode != dest_LowestPrio) ? - MSI_ADDR_REDIRECTION_CPU: - MSI_ADDR_REDIRECTION_LOWPRI) | - MSI_ADDR_DEST_ID(dest); - - msg->data = - MSI_DATA_TRIGGER_EDGE | - MSI_DATA_LEVEL_ASSERT | - ((apic->irq_delivery_mode != dest_LowestPrio) ? - MSI_DATA_DELIVERY_FIXED: - MSI_DATA_DELIVERY_LOWPRI) | - MSI_DATA_VECTOR(cfg->vector); -} - -#ifdef CONFIG_PCI_MSI -static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, - struct msi_msg *msg, u8 hpet_id) -{ - struct irq_cfg *cfg; - int err; - unsigned dest; - - if (disable_apic) - return -ENXIO; - - cfg = irq_cfg(irq); - err = assign_irq_vector(irq, cfg, apic->target_cpus()); - if (err) - return err; - - err = apic->cpu_mask_to_apicid_and(cfg->domain, - apic->target_cpus(), &dest); - if (err) - return err; - - x86_msi.compose_msi_msg(pdev, irq, dest, msg, hpet_id); - - return 0; -} - -static int -msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) -{ - struct irq_cfg *cfg = data->chip_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 = { - .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, - .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) -{ - struct irq_chip *chip = &msi_chip; - struct msi_msg msg; - unsigned int irq = irq_base + irq_offset; - int ret; - - ret = msi_compose_msg(dev, irq, &msg, -1); - if (ret < 0) - return ret; - - irq_set_msi_desc_off(irq_base, irq_offset, msidesc); - - /* - * 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); - - setup_remapped_irq(irq, irq_cfg(irq), chip); - - irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); - - dev_printk(KERN_DEBUG, &dev->dev, "irq %d for MSI/MSI-X\n", irq); - - return 0; -} - -int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) -{ - struct msi_desc *msidesc; - unsigned int irq; - int node, ret; - - /* Multiple MSI vectors only supported with interrupt remapping */ - if (type == PCI_CAP_ID_MSI && nvec > 1) - return 1; - - node = dev_to_node(&dev->dev); - - list_for_each_entry(msidesc, &dev->msi_list, list) { - irq = irq_alloc_hwirq(node); - if (!irq) - return -ENOSPC; - - ret = setup_msi_irq(dev, msidesc, irq, 0); - if (ret < 0) { - irq_free_hwirq(irq); - return ret; - } - - } - return 0; -} - -void native_teardown_msi_irq(unsigned int irq) -{ - irq_free_hwirq(irq); -} - -#ifdef CONFIG_DMAR_TABLE -static int -dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) -{ - struct irq_cfg *cfg = data->chip_data; - unsigned int dest, irq = data->irq; - struct msi_msg msg; - int ret; - - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; - - 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(dest); - msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest); - - dmar_msi_write(irq, &msg); - - return IRQ_SET_MASK_OK_NOCOPY; -} - -static struct irq_chip dmar_msi_type = { - .name = "DMAR_MSI", - .irq_unmask = dmar_msi_unmask, - .irq_mask = dmar_msi_mask, - .irq_ack = apic_ack_edge, - .irq_set_affinity = dmar_msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, - .flags = IRQCHIP_SKIP_SET_WAKE, -}; - -int arch_setup_dmar_msi(unsigned int irq) -{ - int ret; - struct msi_msg msg; - - ret = msi_compose_msg(NULL, irq, &msg, -1); - 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 - -#ifdef CONFIG_HPET_TIMER - -static int hpet_msi_set_affinity(struct irq_data *data, - const struct cpumask *mask, bool force) -{ - struct irq_cfg *cfg = data->chip_data; - struct msi_msg msg; - unsigned int dest; - int ret; - - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; - - hpet_msi_read(data->handler_data, &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); - - hpet_msi_write(data->handler_data, &msg); - - return IRQ_SET_MASK_OK_NOCOPY; -} - -static struct irq_chip hpet_msi_type = { - .name = "HPET_MSI", - .irq_unmask = hpet_msi_unmask, - .irq_mask = hpet_msi_mask, - .irq_ack = apic_ack_edge, - .irq_set_affinity = hpet_msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, - .flags = IRQCHIP_SKIP_SET_WAKE, -}; - -int default_setup_hpet_msi(unsigned int irq, unsigned int id) -{ - struct irq_chip *chip = &hpet_msi_type; - struct msi_msg msg; - int ret; - - ret = msi_compose_msg(NULL, irq, &msg, id); - if (ret < 0) - return ret; - - hpet_msi_write(irq_get_handler_data(irq), &msg); - irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); - setup_remapped_irq(irq, irq_cfg(irq), chip); - - irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); - return 0; -} -#endif - -#endif /* CONFIG_PCI_MSI */ -/* * Hypertransport interrupt support */ #ifdef CONFIG_HT_IRQ diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c new file mode 100644 index 0000000..ddb28f1 --- /dev/null +++ b/arch/x86/kernel/apic/msi.c @@ -0,0 +1,286 @@ +/* + * Support of MSI, HPET and DMAR interrupts. + * + * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo + * Moved from arch/x86/kernel/apic/io_apic.c. + * + * 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 + * published by the Free Software Foundation. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +void native_compose_msi_msg(struct pci_dev *pdev, + unsigned int irq, unsigned int dest, + struct msi_msg *msg, u8 hpet_id) +{ + struct irq_cfg *cfg = irq_cfg(irq); + + msg->address_hi = MSI_ADDR_BASE_HI; + + if (x2apic_enabled()) + msg->address_hi |= MSI_ADDR_EXT_DEST_ID(dest); + + msg->address_lo = + MSI_ADDR_BASE_LO | + ((apic->irq_dest_mode == 0) ? + MSI_ADDR_DEST_MODE_PHYSICAL : + MSI_ADDR_DEST_MODE_LOGICAL) | + ((apic->irq_delivery_mode != dest_LowestPrio) ? + MSI_ADDR_REDIRECTION_CPU : + MSI_ADDR_REDIRECTION_LOWPRI) | + MSI_ADDR_DEST_ID(dest); + + msg->data = + MSI_DATA_TRIGGER_EDGE | + MSI_DATA_LEVEL_ASSERT | + ((apic->irq_delivery_mode != dest_LowestPrio) ? + MSI_DATA_DELIVERY_FIXED : + MSI_DATA_DELIVERY_LOWPRI) | + MSI_DATA_VECTOR(cfg->vector); +} + +static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, + struct msi_msg *msg, u8 hpet_id) +{ + struct irq_cfg *cfg; + int err; + unsigned dest; + + if (disable_apic) + return -ENXIO; + + cfg = irq_cfg(irq); + err = assign_irq_vector(irq, cfg, apic->target_cpus()); + if (err) + return err; + + err = apic->cpu_mask_to_apicid_and(cfg->domain, + apic->target_cpus(), &dest); + if (err) + return err; + + x86_msi.compose_msi_msg(pdev, irq, dest, msg, hpet_id); + + return 0; +} + +static int +msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) +{ + struct irq_cfg *cfg = data->chip_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 = { + .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, + .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) +{ + struct irq_chip *chip = &msi_chip; + struct msi_msg msg; + unsigned int irq = irq_base + irq_offset; + int ret; + + ret = msi_compose_msg(dev, irq, &msg, -1); + if (ret < 0) + return ret; + + irq_set_msi_desc_off(irq_base, irq_offset, msidesc); + + /* + * 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); + + setup_remapped_irq(irq, irq_cfg(irq), chip); + + irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); + + dev_dbg(&dev->dev, "irq %d for MSI/MSI-X\n", irq); + + return 0; +} + +int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +{ + struct msi_desc *msidesc; + unsigned int irq; + int node, ret; + + /* Multiple MSI vectors only supported with interrupt remapping */ + if (type == PCI_CAP_ID_MSI && nvec > 1) + return 1; + + node = dev_to_node(&dev->dev); + + list_for_each_entry(msidesc, &dev->msi_list, list) { + irq = irq_alloc_hwirq(node); + if (!irq) + return -ENOSPC; + + ret = setup_msi_irq(dev, msidesc, irq, 0); + if (ret < 0) { + irq_free_hwirq(irq); + return ret; + } + + } + return 0; +} + +void native_teardown_msi_irq(unsigned int irq) +{ + irq_free_hwirq(irq); +} + +#ifdef CONFIG_DMAR_TABLE +static int +dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, + bool force) +{ + struct irq_cfg *cfg = data->chip_data; + unsigned int dest, irq = data->irq; + struct msi_msg msg; + int ret; + + ret = apic_set_affinity(data, mask, &dest); + if (ret) + return ret; + + 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(dest); + msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest); + + dmar_msi_write(irq, &msg); + + return IRQ_SET_MASK_OK_NOCOPY; +} + +static struct irq_chip dmar_msi_type = { + .name = "DMAR_MSI", + .irq_unmask = dmar_msi_unmask, + .irq_mask = dmar_msi_mask, + .irq_ack = apic_ack_edge, + .irq_set_affinity = dmar_msi_set_affinity, + .irq_retrigger = apic_retrigger_irq, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; + +int arch_setup_dmar_msi(unsigned int irq) +{ + int ret; + struct msi_msg msg; + + ret = msi_compose_msg(NULL, irq, &msg, -1); + 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 + +/* + * MSI message composition + */ +#ifdef CONFIG_HPET_TIMER + +static int hpet_msi_set_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) +{ + struct irq_cfg *cfg = data->chip_data; + struct msi_msg msg; + unsigned int dest; + int ret; + + ret = apic_set_affinity(data, mask, &dest); + if (ret) + return ret; + + hpet_msi_read(data->handler_data, &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); + + hpet_msi_write(data->handler_data, &msg); + + return IRQ_SET_MASK_OK_NOCOPY; +} + +static struct irq_chip hpet_msi_type = { + .name = "HPET_MSI", + .irq_unmask = hpet_msi_unmask, + .irq_mask = hpet_msi_mask, + .irq_ack = apic_ack_edge, + .irq_set_affinity = hpet_msi_set_affinity, + .irq_retrigger = apic_retrigger_irq, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; + +int default_setup_hpet_msi(unsigned int irq, unsigned int id) +{ + struct irq_chip *chip = &hpet_msi_type; + struct msi_msg msg; + int ret; + + ret = msi_compose_msg(NULL, irq, &msg, id); + if (ret < 0) + return ret; + + hpet_msi_write(irq_get_handler_data(irq), &msg); + irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); + setup_remapped_irq(irq, irq_cfg(irq), chip); + + irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); + return 0; +} +#endif -- cgit v1.1