| Message ID | 1411937610-22125-5-git-send-email-suravee.suthikulpanit@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Jason/Thomas,
This patch comes from:
[V8 2/2] irqchip: gicv2m: Add supports for ARM GICv2m MSI(-X)
(https://lkml.org/lkml/2014/9/20/113)
It has been slightly modified to remove the multi-MSI supports for now
(I am waiting to discuss with Marc after he returned from vacation.),
and will be submitted separately.
Since this patch is independent from the multi-MSI stuff. Please let me
know if you would consider taking this separately.
Thanks,
Suravee
On 09/28/2014 03:53 PM, suravee.suthikulpanit@amd.com wrote:
> From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
>
> ARM GICv2m specification extends GICv2 to support MSI(-X) with
> a new set of register frame. This patch introduces support for
> the non-secure GICv2m register frame. Currently, GICV2m is available
> in certain version of GIC-400.
>
> The patch introduces a new property in ARM gic binding, the v2m subnode.
> It is optional.
>
> Cc: Marc Zyngier <Marc.Zyngier@arm.com>
> Cc: Mark Rutland <Mark.Rutland@arm.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Jason Cooper <jason@lakedaemon.net>
> Cc: Catalin Marinas <Catalin.Marinas@arm.com>
> Cc: Will Deacon <Will.Deacon@arm.com>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> ---
> Documentation/devicetree/bindings/arm/gic.txt | 53 +++++
> arch/arm64/Kconfig | 1 +
> drivers/irqchip/Kconfig | 5 +
> drivers/irqchip/Makefile | 1 +
> drivers/irqchip/irq-gic-v2m.c | 301 ++++++++++++++++++++++++++
> drivers/irqchip/irq-gic.c | 82 ++++---
> drivers/irqchip/irq-gic.h | 54 +++++
> 7 files changed, 467 insertions(+), 30 deletions(-)
> create mode 100644 drivers/irqchip/irq-gic-v2m.c
> create mode 100644 drivers/irqchip/irq-gic.h
>
> diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
> index c7d2fa1..ebf976a 100644
> --- a/Documentation/devicetree/bindings/arm/gic.txt
> +++ b/Documentation/devicetree/bindings/arm/gic.txt
> @@ -96,3 +96,56 @@ Example:
> <0x2c006000 0x2000>;
> interrupts = <1 9 0xf04>;
> };
> +
> +
> +* GICv2m extension for MSI/MSI-x support (Optional)
> +
> +Certain revisions of GIC-400 supports MSI/MSI-x via V2M register frame(s).
> +This is enabled by specifying v2m sub-node(s).
> +
> +Required properties:
> +
> +- compatible : The value here should contain "arm,gic-v2m-frame".
> +
> +- msi-controller : Identifies the node as an MSI controller.
> +
> +- reg : GICv2m MSI interface register base and size
> +
> +Optional properties:
> +
> +- arm,msi-base-spi : When the MSI_TYPER register contains an incorrect
> + value, this property should contain the SPI base of
> + the MSI frame, overriding the HW value.
> +
> +- arm,msi-num-spis : When the MSI_TYPER register contains an incorrect
> + value, this property should contain the number of
> + SPIs assigned to the frame, overriding the HW value.
> +
> +Example:
> +
> + interrupt-controller@e1101000 {
> + compatible = "arm,gic-400";
> + #interrupt-cells = <3>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + interrupt-controller;
> + interrupts = <1 8 0xf04>;
> + ranges = <0 0 0 0xe1100000 0 0x100000>;
> + reg = <0x0 0xe1110000 0 0x01000>,
> + <0x0 0xe112f000 0 0x02000>,
> + <0x0 0xe1140000 0 0x10000>,
> + <0x0 0xe1160000 0 0x10000>;
> + v2m0: v2m@0x8000 {
> + compatible = "arm,gic-v2m-frame";
> + msi-controller;
> + reg = <0x0 0x80000 0 0x1000>;
> + };
> +
> + ....
> +
> + v2mN: v2m@0x9000 {
> + compatible = "arm,gic-v2m-frame";
> + msi-controller;
> + reg = <0x0 0x90000 0 0x1000>;
> + };
> + };
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 6b01df9..01927e5 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -12,6 +12,7 @@ config ARM64
> select ARM_ARCH_TIMER
> select ARM_GIC
> select AUDIT_ARCH_COMPAT_GENERIC
> + select ARM_GIC_V2M
> select ARM_GIC_V3
> select BUILDTIME_EXTABLE_SORT
> select CLONE_BACKWARDS
> diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
> index b8632bf..61d18d9 100644
> --- a/drivers/irqchip/Kconfig
> +++ b/drivers/irqchip/Kconfig
> @@ -7,6 +7,11 @@ config ARM_GIC
> select IRQ_DOMAIN
> select MULTI_IRQ_HANDLER
>
> +config ARM_GIC_V2M
> + bool
> + depends on ARM_GIC
> + depends on PCI && PCI_MSI
> +
> config GIC_NON_BANKED
> bool
>
> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
> index 73052ba..3bda951 100644
> --- a/drivers/irqchip/Makefile
> +++ b/drivers/irqchip/Makefile
> @@ -17,6 +17,7 @@ obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o
> obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi-nmi.o
> obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o
> obj-$(CONFIG_ARM_GIC) += irq-gic.o irq-gic-common.o
> +obj-$(CONFIG_ARM_GIC_V2M) += irq-gic-v2m.o
> obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o
> obj-$(CONFIG_ARM_NVIC) += irq-nvic.o
> obj-$(CONFIG_ARM_VIC) += irq-vic.o
> diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
> new file mode 100644
> index 0000000..725b8a4
> --- /dev/null
> +++ b/drivers/irqchip/irq-gic-v2m.c
> @@ -0,0 +1,301 @@
> +/*
> + * ARM GIC v2m MSI(-X) support
> + * Support for Message Signaled Interrupts for systems that
> + * implement ARM Generic Interrupt Controller: GICv2m.
> + *
> + * Copyright (C) 2014 Advanced Micro Devices, Inc.
> + * Authors: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> + * Harish Kasiviswanathan <harish.kasiviswanathan@amd.com>
> + * Brandon Anderson <brandon.anderson@amd.com>
> + *
> + * 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.
> + */
> +
> +#define pr_fmt(fmt) "GICv2m: " fmt
> +
> +#include <linux/bitmap.h>
> +#include <linux/irq.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <linux/of_pci.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.h>
> +
> +#include "irqchip.h"
> +#include "irq-gic.h"
> +#include "irq-gic-common.h"
> +
> +/*
> +* MSI_TYPER:
> +* [31:26] Reserved
> +* [25:16] lowest SPI assigned to MSI
> +* [15:10] Reserved
> +* [9:0] Numer of SPIs assigned to MSI
> +*/
> +#define V2M_MSI_TYPER 0x008
> +#define V2M_MSI_TYPER_BASE_SHIFT 16
> +#define V2M_MSI_TYPER_BASE_MASK 0x3FF
> +#define V2M_MSI_TYPER_NUM_MASK 0x3FF
> +#define V2M_MSI_SETSPI_NS 0x040
> +#define V2M_MIN_SPI 32
> +#define V2M_MAX_SPI 1019
> +
> +#define V2M_MSI_TYPER_BASE_SPI(x) \
> + (((x) >> V2M_MSI_TYPER_BASE_SHIFT) & V2M_MSI_TYPER_BASE_MASK)
> +
> +#define V2M_MSI_TYPER_NUM_SPI(x) ((x) & V2M_MSI_TYPER_NUM_MASK)
> +
> +/*
> + * alloc_msi_irq - Allocate MSIs from available MSI bitmap.
> + * @data: Pointer to v2m_data
> + * @nvec: Number of interrupts to allocate
> + * @irq: Pointer to the allocated irq
> + *
> + * Allocates interrupts only if the contiguous range of MSIs
> + * with specified nvec are available. Otherwise return the number
> + * of available interrupts. If none are available, then returns -ENOENT.
> + */
> +static int alloc_msi_irq(struct v2m_data *data, int nvec, int *irq)
> +{
> + int size = data->nr_spis;
> + int next = size, i = nvec, ret;
> +
> + /* We should never allocate more than available nr_spis */
> + if (i >= size)
> + i = size;
> +
> + spin_lock(&data->msi_cnt_lock);
> +
> + for (; i > 0; i--) {
> + next = bitmap_find_next_zero_area(data->bm,
> + size, 0, i, 0);
> + if (next < size)
> + break;
> + }
> +
> + if (i != nvec) {
> + ret = i ? : -ENOENT;
> + } else {
> + bitmap_set(data->bm, next, nvec);
> + *irq = data->spi_start + next;
> + ret = 0;
> + }
> +
> + spin_unlock(&data->msi_cnt_lock);
> +
> + return ret;
> +}
> +
> +static void gicv2m_teardown_msi_irq(struct msi_chip *chip, unsigned int irq)
> +{
> + int pos;
> + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip);
> +
> + spin_lock(&data->msi_cnt_lock);
> +
> + pos = irq - data->spi_start;
> + if (pos >= 0 && pos < data->nr_spis)
> + bitmap_clear(data->bm, pos, 1);
> +
> + spin_unlock(&data->msi_cnt_lock);
> +}
> +
> +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw)
> +{
> + struct v2m_data *v2m = NULL;
> +
> + list_for_each_entry(v2m, &gic->v2m_list, list) {
> + if (hw >= v2m->spi_start &&
> + hw < v2m->spi_start + v2m->nr_spis)
> + return true;
> + }
> + return false;
> +}
> +
> +static int gicv2m_setup_msi_irq(struct msi_chip *chip,
> + struct pci_dev *pdev,
> + struct msi_desc *desc)
> +{
> + int irq = 0, avail;
> + struct msi_msg msg;
> + phys_addr_t addr;
> + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip);
> +
> + if (!desc) {
> + dev_err(&pdev->dev,
> + "MSI setup failed. Invalid msi descriptor\n");
> + return -EINVAL;
> + }
> +
> + avail = alloc_msi_irq(data, 1, &irq);
> + if (avail != 0) {
> + dev_err(&pdev->dev,
> + "MSI setup failed. Cannnot allocate IRQ\n");
> + return -ENOSPC;
> + }
> +
> + irq_set_chip_data(irq, chip);
> + irq_set_msi_desc(irq, desc);
> + irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
> +
> + addr = data->res.start + V2M_MSI_SETSPI_NS;
> + msg.address_hi = (u32)(addr >> 32);
> + msg.address_lo = (u32)(addr);
> + msg.data = irq;
> + write_msi_msg(irq, &msg);
> +
> + return 0;
> +}
> +
> +static void gicv2m_mask_irq(struct irq_data *d)
> +{
> + gic_mask_irq(d);
> + if (d->msi_desc)
> + mask_msi_irq(d);
> +}
> +
> +static void gicv2m_unmask_irq(struct irq_data *d)
> +{
> + gic_unmask_irq(d);
> + if (d->msi_desc)
> + unmask_msi_irq(d);
> +}
> +
> +static bool is_msi_spi_valid(u32 base, u32 num)
> +{
> + if (base < V2M_MIN_SPI) {
> + pr_err("Invalid MSI base SPI (base:%u)\n", base);
> + return false;
> + }
> +
> + if ((num == 0) || (base + num > V2M_MAX_SPI)) {
> + pr_err("Number of SPIs (%u) exceed maximum (%u)\n",
> + num, V2M_MAX_SPI - V2M_MIN_SPI + 1);
> + return false;
> + }
> +
> + return true;
> +}
> +
> +static int __init
> +gicv2m_init_one(struct device_node *node, struct v2m_data **v,
> + struct gic_chip_data *gic)
> +{
> + int ret;
> + struct v2m_data *v2m = NULL;
> +
> + *v = kzalloc(sizeof(struct v2m_data), GFP_KERNEL);
> + if (!*v) {
> + pr_err("Failed to allocate struct v2m_data.\n");
> + return -ENOMEM;
> + }
> +
> + v2m = *v;
> + v2m->gic = gic;
> + v2m->msi_chip.owner = THIS_MODULE;
> + v2m->msi_chip.of_node = node;
> + v2m->msi_chip.setup_irq = gicv2m_setup_msi_irq;
> + v2m->msi_chip.teardown_irq = gicv2m_teardown_msi_irq;
> + ret = of_address_to_resource(node, 0, &v2m->res);
> + if (ret) {
> + pr_err("Failed to allocate v2m resource.\n");
> + goto err_out;
> + }
> +
> + v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res));
> + if (!v2m->base) {
> + pr_err("Failed to map GICv2m resource\n");
> + ret = -EINVAL;
> + goto err_out;
> + }
> +
> + ret = of_pci_msi_chip_add(&v2m->msi_chip);
> + if (ret) {
> + pr_info("Failed to add msi_chip.\n");
> + goto err_out;
> + }
> +
> + if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) &&
> + !of_property_read_u32(node, "arm,msi-num-spis", &v2m->nr_spis)) {
> + pr_info("Overriding V2M MSI_TYPER (base:%u, num:%u)\n",
> + v2m->spi_start, v2m->nr_spis);
> + } else {
> + u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER);
> +
> + v2m->spi_start = V2M_MSI_TYPER_BASE_SPI(typer);
> + v2m->nr_spis = V2M_MSI_TYPER_NUM_SPI(typer);
> + }
> +
> + if (!is_msi_spi_valid(v2m->spi_start, v2m->nr_spis)) {
> + ret = -EINVAL;
> + goto err_out;
> + }
> +
> + v2m->bm = kzalloc(sizeof(long) * BITS_TO_LONGS(v2m->nr_spis),
> + GFP_KERNEL);
> + if (!v2m->bm) {
> + pr_err("Failed to allocate MSI bitmap\n");
> + ret = -ENOMEM;
> + goto err_out;
> + }
> +
> + spin_lock_init(&v2m->msi_cnt_lock);
> +
> + pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name,
> + (unsigned long)v2m->res.start, (unsigned long)v2m->res.end,
> + v2m->spi_start, (v2m->spi_start + v2m->nr_spis));
> +
> + return 0;
> +err_out:
> + of_pci_msi_chip_remove(&v2m->msi_chip);
> + if (v2m->base)
> + iounmap(v2m->base);
> + kfree(v2m);
> + return ret;
> +}
> +
> +int __init gicv2m_of_init(struct device_node *node,
> + struct gic_chip_data *gic,
> + struct irq_chip *v2m_chip)
> +{
> + int ret = 0;
> + struct v2m_data *v2m;
> + struct device_node *child = NULL;
> +
> + INIT_LIST_HEAD(&gic->v2m_list);
> +
> + v2m_chip->irq_mask = gicv2m_mask_irq;
> + v2m_chip->irq_unmask = gicv2m_unmask_irq;
> +
> + for (;;) {
> + child = of_get_next_child(node, child);
> + if (!child)
> + break;
> +
> + if (!of_device_is_compatible(child, "arm,gic-v2m-frame"))
> + continue;
> +
> + if (!of_find_property(child, "msi-controller", NULL))
> + continue;
> +
> + ret = gicv2m_init_one(child, &v2m, gic);
> + if (ret) {
> + of_node_put(node);
> + break;
> + }
> +
> + list_add_tail(&v2m->list, &gic->v2m_list);
> + }
> +
> + if (ret && list_empty(&gic->v2m_list)) {
> + pr_warn("Warning: Failed to enable GICv2m support.\n");
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
> index dda6dbc..63fa02d 100644
> --- a/drivers/irqchip/irq-gic.c
> +++ b/drivers/irqchip/irq-gic.c
> @@ -46,30 +46,9 @@
> #include <asm/smp_plat.h>
>
> #include "irq-gic-common.h"
> +#include "irq-gic.h"
> #include "irqchip.h"
>
> -union gic_base {
> - void __iomem *common_base;
> - void __percpu * __iomem *percpu_base;
> -};
> -
> -struct gic_chip_data {
> - union gic_base dist_base;
> - union gic_base cpu_base;
> -#ifdef CONFIG_CPU_PM
> - u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)];
> - u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)];
> - u32 saved_spi_target[DIV_ROUND_UP(1020, 4)];
> - u32 __percpu *saved_ppi_enable;
> - u32 __percpu *saved_ppi_conf;
> -#endif
> - struct irq_domain *domain;
> - unsigned int gic_irqs;
> -#ifdef CONFIG_GIC_NON_BANKED
> - void __iomem *(*get_base)(union gic_base *);
> -#endif
> -};
> -
> static DEFINE_RAW_SPINLOCK(irq_controller_lock);
>
> /*
> @@ -131,15 +110,36 @@ static inline void gic_set_base_accessor(struct gic_chip_data *data,
> #define gic_set_base_accessor(d, f)
> #endif
>
> +static inline
> +struct gic_chip_data *irq_data_get_gic_chip_data(struct irq_data *d)
> +{
> + struct gic_chip_data *gic_data;
> + struct msi_chip *mchip;
> + struct v2m_data *v2mdat;
> +
> + /*
> + * For MSI, irq_data.chip_data points to struct msi_chip.
> + * For non-MSI, irq_data.chip_data points to struct gic_chip_data.
> + */
> + if (d->msi_desc) {
> + mchip = irq_data_get_irq_chip_data(d);
> + v2mdat = container_of(mchip, struct v2m_data, msi_chip);
> + gic_data = v2mdat->gic;
> + } else {
> + gic_data = irq_data_get_irq_chip_data(d);
> + }
> + return gic_data;
> +}
> +
> static inline void __iomem *gic_dist_base(struct irq_data *d)
> {
> - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
> + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d);
> return gic_data_dist_base(gic_data);
> }
>
> static inline void __iomem *gic_cpu_base(struct irq_data *d)
> {
> - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
> + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d);
> return gic_data_cpu_base(gic_data);
> }
>
> @@ -151,7 +151,7 @@ static inline unsigned int gic_irq(struct irq_data *d)
> /*
> * Routines to acknowledge, disable and enable interrupts
> */
> -static void gic_mask_irq(struct irq_data *d)
> +void gic_mask_irq(struct irq_data *d)
> {
> u32 mask = 1 << (gic_irq(d) % 32);
>
> @@ -162,7 +162,7 @@ static void gic_mask_irq(struct irq_data *d)
> raw_spin_unlock(&irq_controller_lock);
> }
>
> -static void gic_unmask_irq(struct irq_data *d)
> +void gic_unmask_irq(struct irq_data *d)
> {
> u32 mask = 1 << (gic_irq(d) % 32);
>
> @@ -325,6 +325,15 @@ static struct irq_chip gic_chip = {
> .irq_set_wake = gic_set_wake,
> };
>
> +static struct irq_chip v2m_chip = {
> + .name = "GICv2m",
> + .irq_eoi = gic_eoi_irq,
> + .irq_set_type = gic_set_type,
> +#ifdef CONFIG_SMP
> + .irq_set_affinity = gic_set_affinity,
> +#endif
> +};
> +
> void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
> {
> if (gic_nr >= MAX_GIC_NR)
> @@ -767,19 +776,29 @@ void __init gic_init_physaddr(struct device_node *node)
> static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
> irq_hw_number_t hw)
> {
> + struct gic_chip_data *gic = d->host_data;
> +
> + irq_set_chip_data(irq, gic);
> +
> if (hw < 32) {
> + /* PPIs */
> irq_set_percpu_devid(irq);
> irq_set_chip_and_handler(irq, &gic_chip,
> handle_percpu_devid_irq);
> set_irq_flags(irq, IRQF_VALID | IRQF_NOAUTOEN);
> } else {
> - irq_set_chip_and_handler(irq, &gic_chip,
> - handle_fasteoi_irq);
> + /* SPIs */
> set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
>
> - gic_routable_irq_domain_ops->map(d, irq, hw);
> + if (!gicv2m_check_msi_range(gic, hw)) {
> + irq_set_chip_and_handler(irq, &gic_chip,
> + handle_fasteoi_irq);
> + gic_routable_irq_domain_ops->map(d, irq, hw);
> + } else {
> + irq_set_chip_and_handler(irq, &v2m_chip,
> + handle_fasteoi_irq);
> + }
> }
> - irq_set_chip_data(irq, d->host_data);
> return 0;
> }
>
> @@ -1010,6 +1029,9 @@ gic_of_init(struct device_node *node, struct device_node *parent)
> if (of_property_read_u32(node, "cpu-offset", &percpu_offset))
> percpu_offset = 0;
>
> + if (IS_ENABLED(CONFIG_ARM_GIC_V2M))
> + gicv2m_of_init(node, &gic_data[gic_cnt], &v2m_chip);
> +
> gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node);
> if (!gic_cnt)
> gic_init_physaddr(node);
> diff --git a/drivers/irqchip/irq-gic.h b/drivers/irqchip/irq-gic.h
> new file mode 100644
> index 0000000..3021665
> --- /dev/null
> +++ b/drivers/irqchip/irq-gic.h
> @@ -0,0 +1,54 @@
> +#ifndef _IRQ_GIC_H_
> +#define _IRQ_GIC_H_
> +
> +#include <linux/msi.h>
> +#include <linux/pci.h>
> +
> +union gic_base {
> + void __iomem *common_base;
> + void __percpu * __iomem *percpu_base;
> +};
> +
> +struct gic_chip_data;
> +
> +struct v2m_data {
> +#ifdef CONFIG_ARM_GIC_V2M
> + struct list_head list;
> + spinlock_t msi_cnt_lock;
> + struct msi_chip msi_chip;
> + struct resource res; /* GICv2m resource */
> + void __iomem *base; /* GICv2m virt address */
> + unsigned int spi_start; /* The SPI number that MSIs start */
> + unsigned int nr_spis; /* The number of SPIs for MSIs */
> + unsigned long *bm; /* MSI vector bitmap */
> + struct gic_chip_data *gic;
> +#endif
> +};
> +
> +struct gic_chip_data {
> + union gic_base dist_base;
> + union gic_base cpu_base;
> +#ifdef CONFIG_CPU_PM
> + u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)];
> + u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)];
> + u32 saved_spi_target[DIV_ROUND_UP(1020, 4)];
> + u32 __percpu *saved_ppi_enable;
> + u32 __percpu *saved_ppi_conf;
> +#endif
> + struct irq_domain *domain;
> + unsigned int gic_irqs;
> +#ifdef CONFIG_GIC_NON_BANKED
> + void __iomem *(*get_base)(union gic_base *);
> +#endif
> +#ifdef CONFIG_ARM_GIC_V2M
> + struct list_head v2m_list;
> +#endif
> +};
> +
> +void gic_mask_irq(struct irq_data *d);
> +void gic_unmask_irq(struct irq_data *d);
> +int gicv2m_of_init(struct device_node *node, struct gic_chip_data *gic,
> + struct irq_chip *v2m_chip) __init;
> +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw);
> +
> +#endif /* _IRQ_GIC_H_ */
>
On Sun, 28 Sep 2014, Suravee Suthikulpanit wrote: > Jason/Thomas, > > This patch comes from: > [V8 2/2] irqchip: gicv2m: Add supports for ARM GICv2m MSI(-X) > (https://lkml.org/lkml/2014/9/20/113) > > It has been slightly modified to remove the multi-MSI supports for now > (I am waiting to discuss with Marc after he returned from vacation.), and will > be submitted separately. > > Since this patch is independent from the multi-MSI stuff. Please let me know > if you would consider taking this separately. Not without an explicit reviewed/acked from Marc for the GIC part and a reviewed/acked from the DT folks. Aside of that the conditional madness is just horrible: > > +static inline > > +struct gic_chip_data *irq_data_get_gic_chip_data(struct irq_data *d) > > +{ > > + struct gic_chip_data *gic_data; > > + struct msi_chip *mchip; > > + struct v2m_data *v2mdat; > > + > > + /* > > + * For MSI, irq_data.chip_data points to struct msi_chip. > > + * For non-MSI, irq_data.chip_data points to struct gic_chip_data. > > + */ > > + if (d->msi_desc) { > > + mchip = irq_data_get_irq_chip_data(d); > > + v2mdat = container_of(mchip, struct v2m_data, msi_chip); > > + gic_data = v2mdat->gic; > > + } else { > > + gic_data = irq_data_get_irq_chip_data(d); > > + } > > + return gic_data; > > +} For heavens sake, why are you insisting on duct-taping that into the GIC proper instead of coming up with a proper layering? https://lkml.org/lkml/2014/8/27/228 https://lkml.org/lkml/2014/8/26/707 Thanks, tglx
On Sunday 28 September 2014 15:53:30 suravee.suthikulpanit@amd.com wrote: > + interrupt-controller@e1101000 { > + compatible = "arm,gic-400"; > + #interrupt-cells = >; > + #address-cells = <2>; > + #size-cells = <2>; > + interrupt-controller; > + interrupts = <1 8 0xf04>; > + ranges = <0 0 0 0xe1100000 0 0x100000>; > + reg = <0x0 0xe1110000 0 0x01000>, > + <0x0 0xe112f000 0 0x02000>, > + <0x0 0xe1140000 0 0x10000>, > + <0x0 0xe1160000 0 0x10000>; > + v2m0: v2m@0x8000 { > + compatible = "arm,gic-v2m-frame"; > + msi-controller; > + reg = <0x0 0x80000 0 0x1000>; > + }; > + > + .... > + > + v2mN: v2m@0x9000 { > + compatible = "arm,gic-v2m-frame"; > + msi-controller; > + reg = <0x0 0x90000 0 0x1000>; > + }; > + }; > Could this just be modeled as a separate msi-controller node outside of the GIC? Instead of the arm,msi-base-spi/arm,msi-num-spis properties, how about using regular "interrupts"/"interrupt-parent" properties listing the exact interrupts? That would also make it more flexible in case the same layout is used with a parent other than the GIC. ARnd
diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt index c7d2fa1..ebf976a 100644 --- a/Documentation/devicetree/bindings/arm/gic.txt +++ b/Documentation/devicetree/bindings/arm/gic.txt @@ -96,3 +96,56 @@ Example: <0x2c006000 0x2000>; interrupts = <1 9 0xf04>; }; + + +* GICv2m extension for MSI/MSI-x support (Optional) + +Certain revisions of GIC-400 supports MSI/MSI-x via V2M register frame(s). +This is enabled by specifying v2m sub-node(s). + +Required properties: + +- compatible : The value here should contain "arm,gic-v2m-frame". + +- msi-controller : Identifies the node as an MSI controller. + +- reg : GICv2m MSI interface register base and size + +Optional properties: + +- arm,msi-base-spi : When the MSI_TYPER register contains an incorrect + value, this property should contain the SPI base of + the MSI frame, overriding the HW value. + +- arm,msi-num-spis : When the MSI_TYPER register contains an incorrect + value, this property should contain the number of + SPIs assigned to the frame, overriding the HW value. + +Example: + + interrupt-controller@e1101000 { + compatible = "arm,gic-400"; + #interrupt-cells = <3>; + #address-cells = <2>; + #size-cells = <2>; + interrupt-controller; + interrupts = <1 8 0xf04>; + ranges = <0 0 0 0xe1100000 0 0x100000>; + reg = <0x0 0xe1110000 0 0x01000>, + <0x0 0xe112f000 0 0x02000>, + <0x0 0xe1140000 0 0x10000>, + <0x0 0xe1160000 0 0x10000>; + v2m0: v2m@0x8000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x80000 0 0x1000>; + }; + + .... + + v2mN: v2m@0x9000 { + compatible = "arm,gic-v2m-frame"; + msi-controller; + reg = <0x0 0x90000 0 0x1000>; + }; + }; diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6b01df9..01927e5 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -12,6 +12,7 @@ config ARM64 select ARM_ARCH_TIMER select ARM_GIC select AUDIT_ARCH_COMPAT_GENERIC + select ARM_GIC_V2M select ARM_GIC_V3 select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index b8632bf..61d18d9 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -7,6 +7,11 @@ config ARM_GIC select IRQ_DOMAIN select MULTI_IRQ_HANDLER +config ARM_GIC_V2M + bool + depends on ARM_GIC + depends on PCI && PCI_MSI + config GIC_NON_BANKED bool diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 73052ba..3bda951 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi-nmi.o obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o obj-$(CONFIG_ARM_GIC) += irq-gic.o irq-gic-common.o +obj-$(CONFIG_ARM_GIC_V2M) += irq-gic-v2m.o obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o obj-$(CONFIG_ARM_NVIC) += irq-nvic.o obj-$(CONFIG_ARM_VIC) += irq-vic.o diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c new file mode 100644 index 0000000..725b8a4 --- /dev/null +++ b/drivers/irqchip/irq-gic-v2m.c @@ -0,0 +1,301 @@ +/* + * ARM GIC v2m MSI(-X) support + * Support for Message Signaled Interrupts for systems that + * implement ARM Generic Interrupt Controller: GICv2m. + * + * Copyright (C) 2014 Advanced Micro Devices, Inc. + * Authors: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> + * Harish Kasiviswanathan <harish.kasiviswanathan@amd.com> + * Brandon Anderson <brandon.anderson@amd.com> + * + * 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. + */ + +#define pr_fmt(fmt) "GICv2m: " fmt + +#include <linux/bitmap.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_pci.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include "irqchip.h" +#include "irq-gic.h" +#include "irq-gic-common.h" + +/* +* MSI_TYPER: +* [31:26] Reserved +* [25:16] lowest SPI assigned to MSI +* [15:10] Reserved +* [9:0] Numer of SPIs assigned to MSI +*/ +#define V2M_MSI_TYPER 0x008 +#define V2M_MSI_TYPER_BASE_SHIFT 16 +#define V2M_MSI_TYPER_BASE_MASK 0x3FF +#define V2M_MSI_TYPER_NUM_MASK 0x3FF +#define V2M_MSI_SETSPI_NS 0x040 +#define V2M_MIN_SPI 32 +#define V2M_MAX_SPI 1019 + +#define V2M_MSI_TYPER_BASE_SPI(x) \ + (((x) >> V2M_MSI_TYPER_BASE_SHIFT) & V2M_MSI_TYPER_BASE_MASK) + +#define V2M_MSI_TYPER_NUM_SPI(x) ((x) & V2M_MSI_TYPER_NUM_MASK) + +/* + * alloc_msi_irq - Allocate MSIs from available MSI bitmap. + * @data: Pointer to v2m_data + * @nvec: Number of interrupts to allocate + * @irq: Pointer to the allocated irq + * + * Allocates interrupts only if the contiguous range of MSIs + * with specified nvec are available. Otherwise return the number + * of available interrupts. If none are available, then returns -ENOENT. + */ +static int alloc_msi_irq(struct v2m_data *data, int nvec, int *irq) +{ + int size = data->nr_spis; + int next = size, i = nvec, ret; + + /* We should never allocate more than available nr_spis */ + if (i >= size) + i = size; + + spin_lock(&data->msi_cnt_lock); + + for (; i > 0; i--) { + next = bitmap_find_next_zero_area(data->bm, + size, 0, i, 0); + if (next < size) + break; + } + + if (i != nvec) { + ret = i ? : -ENOENT; + } else { + bitmap_set(data->bm, next, nvec); + *irq = data->spi_start + next; + ret = 0; + } + + spin_unlock(&data->msi_cnt_lock); + + return ret; +} + +static void gicv2m_teardown_msi_irq(struct msi_chip *chip, unsigned int irq) +{ + int pos; + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip); + + spin_lock(&data->msi_cnt_lock); + + pos = irq - data->spi_start; + if (pos >= 0 && pos < data->nr_spis) + bitmap_clear(data->bm, pos, 1); + + spin_unlock(&data->msi_cnt_lock); +} + +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw) +{ + struct v2m_data *v2m = NULL; + + list_for_each_entry(v2m, &gic->v2m_list, list) { + if (hw >= v2m->spi_start && + hw < v2m->spi_start + v2m->nr_spis) + return true; + } + return false; +} + +static int gicv2m_setup_msi_irq(struct msi_chip *chip, + struct pci_dev *pdev, + struct msi_desc *desc) +{ + int irq = 0, avail; + struct msi_msg msg; + phys_addr_t addr; + struct v2m_data *data = container_of(chip, struct v2m_data, msi_chip); + + if (!desc) { + dev_err(&pdev->dev, + "MSI setup failed. Invalid msi descriptor\n"); + return -EINVAL; + } + + avail = alloc_msi_irq(data, 1, &irq); + if (avail != 0) { + dev_err(&pdev->dev, + "MSI setup failed. Cannnot allocate IRQ\n"); + return -ENOSPC; + } + + irq_set_chip_data(irq, chip); + irq_set_msi_desc(irq, desc); + irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING); + + addr = data->res.start + V2M_MSI_SETSPI_NS; + msg.address_hi = (u32)(addr >> 32); + msg.address_lo = (u32)(addr); + msg.data = irq; + write_msi_msg(irq, &msg); + + return 0; +} + +static void gicv2m_mask_irq(struct irq_data *d) +{ + gic_mask_irq(d); + if (d->msi_desc) + mask_msi_irq(d); +} + +static void gicv2m_unmask_irq(struct irq_data *d) +{ + gic_unmask_irq(d); + if (d->msi_desc) + unmask_msi_irq(d); +} + +static bool is_msi_spi_valid(u32 base, u32 num) +{ + if (base < V2M_MIN_SPI) { + pr_err("Invalid MSI base SPI (base:%u)\n", base); + return false; + } + + if ((num == 0) || (base + num > V2M_MAX_SPI)) { + pr_err("Number of SPIs (%u) exceed maximum (%u)\n", + num, V2M_MAX_SPI - V2M_MIN_SPI + 1); + return false; + } + + return true; +} + +static int __init +gicv2m_init_one(struct device_node *node, struct v2m_data **v, + struct gic_chip_data *gic) +{ + int ret; + struct v2m_data *v2m = NULL; + + *v = kzalloc(sizeof(struct v2m_data), GFP_KERNEL); + if (!*v) { + pr_err("Failed to allocate struct v2m_data.\n"); + return -ENOMEM; + } + + v2m = *v; + v2m->gic = gic; + v2m->msi_chip.owner = THIS_MODULE; + v2m->msi_chip.of_node = node; + v2m->msi_chip.setup_irq = gicv2m_setup_msi_irq; + v2m->msi_chip.teardown_irq = gicv2m_teardown_msi_irq; + ret = of_address_to_resource(node, 0, &v2m->res); + if (ret) { + pr_err("Failed to allocate v2m resource.\n"); + goto err_out; + } + + v2m->base = ioremap(v2m->res.start, resource_size(&v2m->res)); + if (!v2m->base) { + pr_err("Failed to map GICv2m resource\n"); + ret = -EINVAL; + goto err_out; + } + + ret = of_pci_msi_chip_add(&v2m->msi_chip); + if (ret) { + pr_info("Failed to add msi_chip.\n"); + goto err_out; + } + + if (!of_property_read_u32(node, "arm,msi-base-spi", &v2m->spi_start) && + !of_property_read_u32(node, "arm,msi-num-spis", &v2m->nr_spis)) { + pr_info("Overriding V2M MSI_TYPER (base:%u, num:%u)\n", + v2m->spi_start, v2m->nr_spis); + } else { + u32 typer = readl_relaxed(v2m->base + V2M_MSI_TYPER); + + v2m->spi_start = V2M_MSI_TYPER_BASE_SPI(typer); + v2m->nr_spis = V2M_MSI_TYPER_NUM_SPI(typer); + } + + if (!is_msi_spi_valid(v2m->spi_start, v2m->nr_spis)) { + ret = -EINVAL; + goto err_out; + } + + v2m->bm = kzalloc(sizeof(long) * BITS_TO_LONGS(v2m->nr_spis), + GFP_KERNEL); + if (!v2m->bm) { + pr_err("Failed to allocate MSI bitmap\n"); + ret = -ENOMEM; + goto err_out; + } + + spin_lock_init(&v2m->msi_cnt_lock); + + pr_info("Node %s: range[%#lx:%#lx], SPI[%d:%d]\n", node->name, + (unsigned long)v2m->res.start, (unsigned long)v2m->res.end, + v2m->spi_start, (v2m->spi_start + v2m->nr_spis)); + + return 0; +err_out: + of_pci_msi_chip_remove(&v2m->msi_chip); + if (v2m->base) + iounmap(v2m->base); + kfree(v2m); + return ret; +} + +int __init gicv2m_of_init(struct device_node *node, + struct gic_chip_data *gic, + struct irq_chip *v2m_chip) +{ + int ret = 0; + struct v2m_data *v2m; + struct device_node *child = NULL; + + INIT_LIST_HEAD(&gic->v2m_list); + + v2m_chip->irq_mask = gicv2m_mask_irq; + v2m_chip->irq_unmask = gicv2m_unmask_irq; + + for (;;) { + child = of_get_next_child(node, child); + if (!child) + break; + + if (!of_device_is_compatible(child, "arm,gic-v2m-frame")) + continue; + + if (!of_find_property(child, "msi-controller", NULL)) + continue; + + ret = gicv2m_init_one(child, &v2m, gic); + if (ret) { + of_node_put(node); + break; + } + + list_add_tail(&v2m->list, &gic->v2m_list); + } + + if (ret && list_empty(&gic->v2m_list)) { + pr_warn("Warning: Failed to enable GICv2m support.\n"); + return -EINVAL; + } + + return ret; +} diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index dda6dbc..63fa02d 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -46,30 +46,9 @@ #include <asm/smp_plat.h> #include "irq-gic-common.h" +#include "irq-gic.h" #include "irqchip.h" -union gic_base { - void __iomem *common_base; - void __percpu * __iomem *percpu_base; -}; - -struct gic_chip_data { - union gic_base dist_base; - union gic_base cpu_base; -#ifdef CONFIG_CPU_PM - u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)]; - u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)]; - u32 saved_spi_target[DIV_ROUND_UP(1020, 4)]; - u32 __percpu *saved_ppi_enable; - u32 __percpu *saved_ppi_conf; -#endif - struct irq_domain *domain; - unsigned int gic_irqs; -#ifdef CONFIG_GIC_NON_BANKED - void __iomem *(*get_base)(union gic_base *); -#endif -}; - static DEFINE_RAW_SPINLOCK(irq_controller_lock); /* @@ -131,15 +110,36 @@ static inline void gic_set_base_accessor(struct gic_chip_data *data, #define gic_set_base_accessor(d, f) #endif +static inline +struct gic_chip_data *irq_data_get_gic_chip_data(struct irq_data *d) +{ + struct gic_chip_data *gic_data; + struct msi_chip *mchip; + struct v2m_data *v2mdat; + + /* + * For MSI, irq_data.chip_data points to struct msi_chip. + * For non-MSI, irq_data.chip_data points to struct gic_chip_data. + */ + if (d->msi_desc) { + mchip = irq_data_get_irq_chip_data(d); + v2mdat = container_of(mchip, struct v2m_data, msi_chip); + gic_data = v2mdat->gic; + } else { + gic_data = irq_data_get_irq_chip_data(d); + } + return gic_data; +} + static inline void __iomem *gic_dist_base(struct irq_data *d) { - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d); + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d); return gic_data_dist_base(gic_data); } static inline void __iomem *gic_cpu_base(struct irq_data *d) { - struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d); + struct gic_chip_data *gic_data = irq_data_get_gic_chip_data(d); return gic_data_cpu_base(gic_data); } @@ -151,7 +151,7 @@ static inline unsigned int gic_irq(struct irq_data *d) /* * Routines to acknowledge, disable and enable interrupts */ -static void gic_mask_irq(struct irq_data *d) +void gic_mask_irq(struct irq_data *d) { u32 mask = 1 << (gic_irq(d) % 32); @@ -162,7 +162,7 @@ static void gic_mask_irq(struct irq_data *d) raw_spin_unlock(&irq_controller_lock); } -static void gic_unmask_irq(struct irq_data *d) +void gic_unmask_irq(struct irq_data *d) { u32 mask = 1 << (gic_irq(d) % 32); @@ -325,6 +325,15 @@ static struct irq_chip gic_chip = { .irq_set_wake = gic_set_wake, }; +static struct irq_chip v2m_chip = { + .name = "GICv2m", + .irq_eoi = gic_eoi_irq, + .irq_set_type = gic_set_type, +#ifdef CONFIG_SMP + .irq_set_affinity = gic_set_affinity, +#endif +}; + void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq) { if (gic_nr >= MAX_GIC_NR) @@ -767,19 +776,29 @@ void __init gic_init_physaddr(struct device_node *node) static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { + struct gic_chip_data *gic = d->host_data; + + irq_set_chip_data(irq, gic); + if (hw < 32) { + /* PPIs */ irq_set_percpu_devid(irq); irq_set_chip_and_handler(irq, &gic_chip, handle_percpu_devid_irq); set_irq_flags(irq, IRQF_VALID | IRQF_NOAUTOEN); } else { - irq_set_chip_and_handler(irq, &gic_chip, - handle_fasteoi_irq); + /* SPIs */ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - gic_routable_irq_domain_ops->map(d, irq, hw); + if (!gicv2m_check_msi_range(gic, hw)) { + irq_set_chip_and_handler(irq, &gic_chip, + handle_fasteoi_irq); + gic_routable_irq_domain_ops->map(d, irq, hw); + } else { + irq_set_chip_and_handler(irq, &v2m_chip, + handle_fasteoi_irq); + } } - irq_set_chip_data(irq, d->host_data); return 0; } @@ -1010,6 +1029,9 @@ gic_of_init(struct device_node *node, struct device_node *parent) if (of_property_read_u32(node, "cpu-offset", &percpu_offset)) percpu_offset = 0; + if (IS_ENABLED(CONFIG_ARM_GIC_V2M)) + gicv2m_of_init(node, &gic_data[gic_cnt], &v2m_chip); + gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node); if (!gic_cnt) gic_init_physaddr(node); diff --git a/drivers/irqchip/irq-gic.h b/drivers/irqchip/irq-gic.h new file mode 100644 index 0000000..3021665 --- /dev/null +++ b/drivers/irqchip/irq-gic.h @@ -0,0 +1,54 @@ +#ifndef _IRQ_GIC_H_ +#define _IRQ_GIC_H_ + +#include <linux/msi.h> +#include <linux/pci.h> + +union gic_base { + void __iomem *common_base; + void __percpu * __iomem *percpu_base; +}; + +struct gic_chip_data; + +struct v2m_data { +#ifdef CONFIG_ARM_GIC_V2M + struct list_head list; + spinlock_t msi_cnt_lock; + struct msi_chip msi_chip; + struct resource res; /* GICv2m resource */ + void __iomem *base; /* GICv2m virt address */ + unsigned int spi_start; /* The SPI number that MSIs start */ + unsigned int nr_spis; /* The number of SPIs for MSIs */ + unsigned long *bm; /* MSI vector bitmap */ + struct gic_chip_data *gic; +#endif +}; + +struct gic_chip_data { + union gic_base dist_base; + union gic_base cpu_base; +#ifdef CONFIG_CPU_PM + u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)]; + u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)]; + u32 saved_spi_target[DIV_ROUND_UP(1020, 4)]; + u32 __percpu *saved_ppi_enable; + u32 __percpu *saved_ppi_conf; +#endif + struct irq_domain *domain; + unsigned int gic_irqs; +#ifdef CONFIG_GIC_NON_BANKED + void __iomem *(*get_base)(union gic_base *); +#endif +#ifdef CONFIG_ARM_GIC_V2M + struct list_head v2m_list; +#endif +}; + +void gic_mask_irq(struct irq_data *d); +void gic_unmask_irq(struct irq_data *d); +int gicv2m_of_init(struct device_node *node, struct gic_chip_data *gic, + struct irq_chip *v2m_chip) __init; +bool gicv2m_check_msi_range(struct gic_chip_data *gic, irq_hw_number_t hw); + +#endif /* _IRQ_GIC_H_ */