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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/irqchip/irq-ti-sci-inta.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/irqchip/irq-ti-sci-inta.c')
-rw-r--r--drivers/irqchip/irq-ti-sci-inta.c746
1 files changed, 746 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
new file mode 100644
index 000000000..5fdbb4358
--- /dev/null
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Texas Instruments' K3 Interrupt Aggregator irqchip driver
+ *
+ * Copyright (C) 2018-2019 Texas Instruments Incorporated - https://www.ti.com/
+ * Lokesh Vutla <lokeshvutla@ti.com>
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/interrupt.h>
+#include <linux/msi.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/soc/ti/ti_sci_inta_msi.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+#include <asm-generic/msi.h>
+
+#define TI_SCI_DEV_ID_MASK 0xffff
+#define TI_SCI_DEV_ID_SHIFT 16
+#define TI_SCI_IRQ_ID_MASK 0xffff
+#define TI_SCI_IRQ_ID_SHIFT 0
+#define HWIRQ_TO_DEVID(hwirq) (((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
+ (TI_SCI_DEV_ID_MASK))
+#define HWIRQ_TO_IRQID(hwirq) ((hwirq) & (TI_SCI_IRQ_ID_MASK))
+#define TO_HWIRQ(dev, index) ((((dev) & TI_SCI_DEV_ID_MASK) << \
+ TI_SCI_DEV_ID_SHIFT) | \
+ ((index) & TI_SCI_IRQ_ID_MASK))
+
+#define MAX_EVENTS_PER_VINT 64
+#define VINT_ENABLE_SET_OFFSET 0x0
+#define VINT_ENABLE_CLR_OFFSET 0x8
+#define VINT_STATUS_OFFSET 0x18
+#define VINT_STATUS_MASKED_OFFSET 0x20
+
+/**
+ * struct ti_sci_inta_event_desc - Description of an event coming to
+ * Interrupt Aggregator. This serves
+ * as a mapping table for global event,
+ * hwirq and vint bit.
+ * @global_event: Global event number corresponding to this event
+ * @hwirq: Hwirq of the incoming interrupt
+ * @vint_bit: Corresponding vint bit to which this event is attached.
+ */
+struct ti_sci_inta_event_desc {
+ u16 global_event;
+ u32 hwirq;
+ u8 vint_bit;
+};
+
+/**
+ * struct ti_sci_inta_vint_desc - Description of a virtual interrupt coming out
+ * of Interrupt Aggregator.
+ * @domain: Pointer to IRQ domain to which this vint belongs.
+ * @list: List entry for the vint list
+ * @event_map: Bitmap to manage the allocation of events to vint.
+ * @events: Array of event descriptors assigned to this vint.
+ * @parent_virq: Linux IRQ number that gets attached to parent
+ * @vint_id: TISCI vint ID
+ */
+struct ti_sci_inta_vint_desc {
+ struct irq_domain *domain;
+ struct list_head list;
+ DECLARE_BITMAP(event_map, MAX_EVENTS_PER_VINT);
+ struct ti_sci_inta_event_desc events[MAX_EVENTS_PER_VINT];
+ unsigned int parent_virq;
+ u16 vint_id;
+};
+
+/**
+ * struct ti_sci_inta_irq_domain - Structure representing a TISCI based
+ * Interrupt Aggregator IRQ domain.
+ * @sci: Pointer to TISCI handle
+ * @vint: TISCI resource pointer representing IA interrupts.
+ * @global_event: TISCI resource pointer representing global events.
+ * @vint_list: List of the vints active in the system
+ * @vint_mutex: Mutex to protect vint_list
+ * @base: Base address of the memory mapped IO registers
+ * @pdev: Pointer to platform device.
+ * @ti_sci_id: TI-SCI device identifier
+ * @unmapped_cnt: Number of @unmapped_dev_ids entries
+ * @unmapped_dev_ids: Pointer to an array of TI-SCI device identifiers of
+ * unmapped event sources.
+ * Unmapped Events are not part of the Global Event Map and
+ * they are converted to Global event within INTA to be
+ * received by the same INTA to generate an interrupt.
+ * In case an interrupt request comes for a device which is
+ * generating Unmapped Event, we must use the INTA's TI-SCI
+ * device identifier in place of the source device
+ * identifier to let sysfw know where it has to program the
+ * Global Event number.
+ */
+struct ti_sci_inta_irq_domain {
+ const struct ti_sci_handle *sci;
+ struct ti_sci_resource *vint;
+ struct ti_sci_resource *global_event;
+ struct list_head vint_list;
+ /* Mutex to protect vint list */
+ struct mutex vint_mutex;
+ void __iomem *base;
+ struct platform_device *pdev;
+ u32 ti_sci_id;
+
+ int unmapped_cnt;
+ u16 *unmapped_dev_ids;
+};
+
+#define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
+ events[i])
+
+static u16 ti_sci_inta_get_dev_id(struct ti_sci_inta_irq_domain *inta, u32 hwirq)
+{
+ u16 dev_id = HWIRQ_TO_DEVID(hwirq);
+ int i;
+
+ if (inta->unmapped_cnt == 0)
+ return dev_id;
+
+ /*
+ * For devices sending Unmapped Events we must use the INTA's TI-SCI
+ * device identifier number to be able to convert it to a Global Event
+ * and map it to an interrupt.
+ */
+ for (i = 0; i < inta->unmapped_cnt; i++) {
+ if (dev_id == inta->unmapped_dev_ids[i]) {
+ dev_id = inta->ti_sci_id;
+ break;
+ }
+ }
+
+ return dev_id;
+}
+
+/**
+ * ti_sci_inta_irq_handler() - Chained IRQ handler for the vint irqs
+ * @desc: Pointer to irq_desc corresponding to the irq
+ */
+static void ti_sci_inta_irq_handler(struct irq_desc *desc)
+{
+ struct ti_sci_inta_vint_desc *vint_desc;
+ struct ti_sci_inta_irq_domain *inta;
+ struct irq_domain *domain;
+ unsigned int bit;
+ unsigned long val;
+
+ vint_desc = irq_desc_get_handler_data(desc);
+ domain = vint_desc->domain;
+ inta = domain->host_data;
+
+ chained_irq_enter(irq_desc_get_chip(desc), desc);
+
+ val = readq_relaxed(inta->base + vint_desc->vint_id * 0x1000 +
+ VINT_STATUS_MASKED_OFFSET);
+
+ for_each_set_bit(bit, &val, MAX_EVENTS_PER_VINT)
+ generic_handle_domain_irq(domain, vint_desc->events[bit].hwirq);
+
+ chained_irq_exit(irq_desc_get_chip(desc), desc);
+}
+
+/**
+ * ti_sci_inta_xlate_irq() - Translate hwirq to parent's hwirq.
+ * @inta: IRQ domain corresponding to Interrupt Aggregator
+ * @irq: Hardware irq corresponding to the above irq domain
+ *
+ * Return parent irq number if translation is available else -ENOENT.
+ */
+static int ti_sci_inta_xlate_irq(struct ti_sci_inta_irq_domain *inta,
+ u16 vint_id)
+{
+ struct device_node *np = dev_of_node(&inta->pdev->dev);
+ u32 base, parent_base, size;
+ const __be32 *range;
+ int len;
+
+ range = of_get_property(np, "ti,interrupt-ranges", &len);
+ if (!range)
+ return vint_id;
+
+ for (len /= sizeof(*range); len >= 3; len -= 3) {
+ base = be32_to_cpu(*range++);
+ parent_base = be32_to_cpu(*range++);
+ size = be32_to_cpu(*range++);
+
+ if (base <= vint_id && vint_id < base + size)
+ return vint_id - base + parent_base;
+ }
+
+ return -ENOENT;
+}
+
+/**
+ * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
+ * @domain: IRQ domain corresponding to Interrupt Aggregator
+ *
+ * Return 0 if all went well else corresponding error value.
+ */
+static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_domain *domain)
+{
+ struct ti_sci_inta_irq_domain *inta = domain->host_data;
+ struct ti_sci_inta_vint_desc *vint_desc;
+ struct irq_fwspec parent_fwspec;
+ struct device_node *parent_node;
+ unsigned int parent_virq;
+ int p_hwirq, ret;
+ u16 vint_id;
+
+ vint_id = ti_sci_get_free_resource(inta->vint);
+ if (vint_id == TI_SCI_RESOURCE_NULL)
+ return ERR_PTR(-EINVAL);
+
+ p_hwirq = ti_sci_inta_xlate_irq(inta, vint_id);
+ if (p_hwirq < 0) {
+ ret = p_hwirq;
+ goto free_vint;
+ }
+
+ vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
+ if (!vint_desc) {
+ ret = -ENOMEM;
+ goto free_vint;
+ }
+
+ vint_desc->domain = domain;
+ vint_desc->vint_id = vint_id;
+ INIT_LIST_HEAD(&vint_desc->list);
+
+ parent_node = of_irq_find_parent(dev_of_node(&inta->pdev->dev));
+ parent_fwspec.fwnode = of_node_to_fwnode(parent_node);
+
+ if (of_device_is_compatible(parent_node, "arm,gic-v3")) {
+ /* Parent is GIC */
+ parent_fwspec.param_count = 3;
+ parent_fwspec.param[0] = 0;
+ parent_fwspec.param[1] = p_hwirq - 32;
+ parent_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH;
+ } else {
+ /* Parent is Interrupt Router */
+ parent_fwspec.param_count = 1;
+ parent_fwspec.param[0] = p_hwirq;
+ }
+
+ parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
+ if (parent_virq == 0) {
+ dev_err(&inta->pdev->dev, "Parent IRQ allocation failed\n");
+ ret = -EINVAL;
+ goto free_vint_desc;
+
+ }
+ vint_desc->parent_virq = parent_virq;
+
+ list_add_tail(&vint_desc->list, &inta->vint_list);
+ irq_set_chained_handler_and_data(vint_desc->parent_virq,
+ ti_sci_inta_irq_handler, vint_desc);
+
+ return vint_desc;
+free_vint_desc:
+ kfree(vint_desc);
+free_vint:
+ ti_sci_release_resource(inta->vint, vint_id);
+ return ERR_PTR(ret);
+}
+
+/**
+ * ti_sci_inta_alloc_event() - Attach an event to a IA vint.
+ * @vint_desc: Pointer to vint_desc to which the event gets attached
+ * @free_bit: Bit inside vint to which event gets attached
+ * @hwirq: hwirq of the input event
+ *
+ * Return event_desc pointer if all went ok else appropriate error value.
+ */
+static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_event(struct ti_sci_inta_vint_desc *vint_desc,
+ u16 free_bit,
+ u32 hwirq)
+{
+ struct ti_sci_inta_irq_domain *inta = vint_desc->domain->host_data;
+ struct ti_sci_inta_event_desc *event_desc;
+ u16 dev_id, dev_index;
+ int err;
+
+ dev_id = ti_sci_inta_get_dev_id(inta, hwirq);
+ dev_index = HWIRQ_TO_IRQID(hwirq);
+
+ event_desc = &vint_desc->events[free_bit];
+ event_desc->hwirq = hwirq;
+ event_desc->vint_bit = free_bit;
+ event_desc->global_event = ti_sci_get_free_resource(inta->global_event);
+ if (event_desc->global_event == TI_SCI_RESOURCE_NULL)
+ return ERR_PTR(-EINVAL);
+
+ err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,
+ dev_id, dev_index,
+ inta->ti_sci_id,
+ vint_desc->vint_id,
+ event_desc->global_event,
+ free_bit);
+ if (err)
+ goto free_global_event;
+
+ return event_desc;
+free_global_event:
+ ti_sci_release_resource(inta->global_event, event_desc->global_event);
+ return ERR_PTR(err);
+}
+
+/**
+ * ti_sci_inta_alloc_irq() - Allocate an irq within INTA domain
+ * @domain: irq_domain pointer corresponding to INTA
+ * @hwirq: hwirq of the input event
+ *
+ * Note: Allocation happens in the following manner:
+ * - Find a free bit available in any of the vints available in the list.
+ * - If not found, allocate a vint from the vint pool
+ * - Attach the free bit to input hwirq.
+ * Return event_desc if all went ok else appropriate error value.
+ */
+static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_irq(struct irq_domain *domain,
+ u32 hwirq)
+{
+ struct ti_sci_inta_irq_domain *inta = domain->host_data;
+ struct ti_sci_inta_vint_desc *vint_desc = NULL;
+ struct ti_sci_inta_event_desc *event_desc;
+ u16 free_bit;
+
+ mutex_lock(&inta->vint_mutex);
+ list_for_each_entry(vint_desc, &inta->vint_list, list) {
+ free_bit = find_first_zero_bit(vint_desc->event_map,
+ MAX_EVENTS_PER_VINT);
+ if (free_bit != MAX_EVENTS_PER_VINT) {
+ set_bit(free_bit, vint_desc->event_map);
+ goto alloc_event;
+ }
+ }
+
+ /* No free bits available. Allocate a new vint */
+ vint_desc = ti_sci_inta_alloc_parent_irq(domain);
+ if (IS_ERR(vint_desc)) {
+ event_desc = ERR_CAST(vint_desc);
+ goto unlock;
+ }
+
+ free_bit = find_first_zero_bit(vint_desc->event_map,
+ MAX_EVENTS_PER_VINT);
+ set_bit(free_bit, vint_desc->event_map);
+
+alloc_event:
+ event_desc = ti_sci_inta_alloc_event(vint_desc, free_bit, hwirq);
+ if (IS_ERR(event_desc))
+ clear_bit(free_bit, vint_desc->event_map);
+
+unlock:
+ mutex_unlock(&inta->vint_mutex);
+ return event_desc;
+}
+
+/**
+ * ti_sci_inta_free_parent_irq() - Free a parent irq to INTA
+ * @inta: Pointer to inta domain.
+ * @vint_desc: Pointer to vint_desc that needs to be freed.
+ */
+static void ti_sci_inta_free_parent_irq(struct ti_sci_inta_irq_domain *inta,
+ struct ti_sci_inta_vint_desc *vint_desc)
+{
+ if (find_first_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT) == MAX_EVENTS_PER_VINT) {
+ list_del(&vint_desc->list);
+ ti_sci_release_resource(inta->vint, vint_desc->vint_id);
+ irq_dispose_mapping(vint_desc->parent_virq);
+ kfree(vint_desc);
+ }
+}
+
+/**
+ * ti_sci_inta_free_irq() - Free an IRQ within INTA domain
+ * @event_desc: Pointer to event_desc that needs to be freed.
+ * @hwirq: Hwirq number within INTA domain that needs to be freed
+ */
+static void ti_sci_inta_free_irq(struct ti_sci_inta_event_desc *event_desc,
+ u32 hwirq)
+{
+ struct ti_sci_inta_vint_desc *vint_desc;
+ struct ti_sci_inta_irq_domain *inta;
+ u16 dev_id;
+
+ vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
+ inta = vint_desc->domain->host_data;
+ dev_id = ti_sci_inta_get_dev_id(inta, hwirq);
+ /* free event irq */
+ mutex_lock(&inta->vint_mutex);
+ inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
+ dev_id, HWIRQ_TO_IRQID(hwirq),
+ inta->ti_sci_id,
+ vint_desc->vint_id,
+ event_desc->global_event,
+ event_desc->vint_bit);
+
+ clear_bit(event_desc->vint_bit, vint_desc->event_map);
+ ti_sci_release_resource(inta->global_event, event_desc->global_event);
+ event_desc->global_event = TI_SCI_RESOURCE_NULL;
+ event_desc->hwirq = 0;
+
+ ti_sci_inta_free_parent_irq(inta, vint_desc);
+ mutex_unlock(&inta->vint_mutex);
+}
+
+/**
+ * ti_sci_inta_request_resources() - Allocate resources for input irq
+ * @data: Pointer to corresponding irq_data
+ *
+ * Note: This is the core api where the actual allocation happens for input
+ * hwirq. This allocation involves creating a parent irq for vint.
+ * If this is done in irq_domain_ops.alloc() then a deadlock is reached
+ * for allocation. So this allocation is being done in request_resources()
+ *
+ * Return: 0 if all went well else corresponding error.
+ */
+static int ti_sci_inta_request_resources(struct irq_data *data)
+{
+ struct ti_sci_inta_event_desc *event_desc;
+
+ event_desc = ti_sci_inta_alloc_irq(data->domain, data->hwirq);
+ if (IS_ERR(event_desc))
+ return PTR_ERR(event_desc);
+
+ data->chip_data = event_desc;
+
+ return 0;
+}
+
+/**
+ * ti_sci_inta_release_resources - Release resources for input irq
+ * @data: Pointer to corresponding irq_data
+ *
+ * Note: Corresponding to request_resources(), all the unmapping and deletion
+ * of parent vint irqs happens in this api.
+ */
+static void ti_sci_inta_release_resources(struct irq_data *data)
+{
+ struct ti_sci_inta_event_desc *event_desc;
+
+ event_desc = irq_data_get_irq_chip_data(data);
+ ti_sci_inta_free_irq(event_desc, data->hwirq);
+}
+
+/**
+ * ti_sci_inta_manage_event() - Control the event based on the offset
+ * @data: Pointer to corresponding irq_data
+ * @offset: register offset using which event is controlled.
+ */
+static void ti_sci_inta_manage_event(struct irq_data *data, u32 offset)
+{
+ struct ti_sci_inta_event_desc *event_desc;
+ struct ti_sci_inta_vint_desc *vint_desc;
+ struct ti_sci_inta_irq_domain *inta;
+
+ event_desc = irq_data_get_irq_chip_data(data);
+ vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
+ inta = data->domain->host_data;
+
+ writeq_relaxed(BIT(event_desc->vint_bit),
+ inta->base + vint_desc->vint_id * 0x1000 + offset);
+}
+
+/**
+ * ti_sci_inta_mask_irq() - Mask an event
+ * @data: Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_mask_irq(struct irq_data *data)
+{
+ ti_sci_inta_manage_event(data, VINT_ENABLE_CLR_OFFSET);
+}
+
+/**
+ * ti_sci_inta_unmask_irq() - Unmask an event
+ * @data: Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_unmask_irq(struct irq_data *data)
+{
+ ti_sci_inta_manage_event(data, VINT_ENABLE_SET_OFFSET);
+}
+
+/**
+ * ti_sci_inta_ack_irq() - Ack an event
+ * @data: Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_ack_irq(struct irq_data *data)
+{
+ /*
+ * Do not clear the event if hardware is capable of sending
+ * a down event.
+ */
+ if (irqd_get_trigger_type(data) != IRQF_TRIGGER_HIGH)
+ ti_sci_inta_manage_event(data, VINT_STATUS_OFFSET);
+}
+
+static int ti_sci_inta_set_affinity(struct irq_data *d,
+ const struct cpumask *mask_val, bool force)
+{
+ return -EINVAL;
+}
+
+/**
+ * ti_sci_inta_set_type() - Update the trigger type of the irq.
+ * @data: Pointer to corresponding irq_data
+ * @type: Trigger type as specified by user
+ *
+ * Note: This updates the handle_irq callback for level msi.
+ *
+ * Return 0 if all went well else appropriate error.
+ */
+static int ti_sci_inta_set_type(struct irq_data *data, unsigned int type)
+{
+ /*
+ * .alloc default sets handle_edge_irq. But if the user specifies
+ * that IRQ is level MSI, then update the handle to handle_level_irq
+ */
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQF_TRIGGER_HIGH:
+ irq_set_handler_locked(data, handle_level_irq);
+ return 0;
+ case IRQF_TRIGGER_RISING:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct irq_chip ti_sci_inta_irq_chip = {
+ .name = "INTA",
+ .irq_ack = ti_sci_inta_ack_irq,
+ .irq_mask = ti_sci_inta_mask_irq,
+ .irq_set_type = ti_sci_inta_set_type,
+ .irq_unmask = ti_sci_inta_unmask_irq,
+ .irq_set_affinity = ti_sci_inta_set_affinity,
+ .irq_request_resources = ti_sci_inta_request_resources,
+ .irq_release_resources = ti_sci_inta_release_resources,
+};
+
+/**
+ * ti_sci_inta_irq_domain_free() - Free an IRQ from the IRQ domain
+ * @domain: Domain to which the irqs belong
+ * @virq: base linux virtual IRQ to be freed.
+ * @nr_irqs: Number of continuous irqs to be freed
+ */
+static void ti_sci_inta_irq_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ struct irq_data *data = irq_domain_get_irq_data(domain, virq);
+
+ irq_domain_reset_irq_data(data);
+}
+
+/**
+ * ti_sci_inta_irq_domain_alloc() - Allocate Interrupt aggregator IRQs
+ * @domain: Point to the interrupt aggregator IRQ domain
+ * @virq: Corresponding Linux virtual IRQ number
+ * @nr_irqs: Continuous irqs to be allocated
+ * @data: Pointer to firmware specifier
+ *
+ * No actual allocation happens here.
+ *
+ * Return 0 if all went well else appropriate error value.
+ */
+static int ti_sci_inta_irq_domain_alloc(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs,
+ void *data)
+{
+ msi_alloc_info_t *arg = data;
+
+ irq_domain_set_info(domain, virq, arg->hwirq, &ti_sci_inta_irq_chip,
+ NULL, handle_edge_irq, NULL, NULL);
+
+ return 0;
+}
+
+static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = {
+ .free = ti_sci_inta_irq_domain_free,
+ .alloc = ti_sci_inta_irq_domain_alloc,
+};
+
+static struct irq_chip ti_sci_inta_msi_irq_chip = {
+ .name = "MSI-INTA",
+ .flags = IRQCHIP_SUPPORTS_LEVEL_MSI,
+};
+
+static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,
+ struct msi_desc *desc)
+{
+ struct platform_device *pdev = to_platform_device(desc->dev);
+
+ arg->desc = desc;
+ arg->hwirq = TO_HWIRQ(pdev->id, desc->msi_index);
+}
+
+static struct msi_domain_ops ti_sci_inta_msi_ops = {
+ .set_desc = ti_sci_inta_msi_set_desc,
+};
+
+static struct msi_domain_info ti_sci_inta_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_LEVEL_CAPABLE),
+ .ops = &ti_sci_inta_msi_ops,
+ .chip = &ti_sci_inta_msi_irq_chip,
+};
+
+static int ti_sci_inta_get_unmapped_sources(struct ti_sci_inta_irq_domain *inta)
+{
+ struct device *dev = &inta->pdev->dev;
+ struct device_node *node = dev_of_node(dev);
+ struct of_phandle_iterator it;
+ int count, err, ret, i;
+
+ count = of_count_phandle_with_args(node, "ti,unmapped-event-sources", NULL);
+ if (count <= 0)
+ return 0;
+
+ inta->unmapped_dev_ids = devm_kcalloc(dev, count,
+ sizeof(*inta->unmapped_dev_ids),
+ GFP_KERNEL);
+ if (!inta->unmapped_dev_ids)
+ return -ENOMEM;
+
+ i = 0;
+ of_for_each_phandle(&it, err, node, "ti,unmapped-event-sources", NULL, 0) {
+ u32 dev_id;
+
+ ret = of_property_read_u32(it.node, "ti,sci-dev-id", &dev_id);
+ if (ret) {
+ dev_err(dev, "ti,sci-dev-id read failure for %pOFf\n", it.node);
+ of_node_put(it.node);
+ return ret;
+ }
+ inta->unmapped_dev_ids[i++] = dev_id;
+ }
+
+ inta->unmapped_cnt = count;
+
+ return 0;
+}
+
+static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
+{
+ struct irq_domain *parent_domain, *domain, *msi_domain;
+ struct device_node *parent_node, *node;
+ struct ti_sci_inta_irq_domain *inta;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ node = dev_of_node(dev);
+ parent_node = of_irq_find_parent(node);
+ if (!parent_node) {
+ dev_err(dev, "Failed to get IRQ parent node\n");
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent_node);
+ if (!parent_domain)
+ return -EPROBE_DEFER;
+
+ inta = devm_kzalloc(dev, sizeof(*inta), GFP_KERNEL);
+ if (!inta)
+ return -ENOMEM;
+
+ inta->pdev = pdev;
+ inta->sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
+ if (IS_ERR(inta->sci))
+ return dev_err_probe(dev, PTR_ERR(inta->sci),
+ "ti,sci read fail\n");
+
+ ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &inta->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "missing 'ti,sci-dev-id' property\n");
+ return -EINVAL;
+ }
+
+ inta->vint = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,
+ TI_SCI_RESASG_SUBTYPE_IA_VINT);
+ if (IS_ERR(inta->vint)) {
+ dev_err(dev, "VINT resource allocation failed\n");
+ return PTR_ERR(inta->vint);
+ }
+
+ inta->global_event = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,
+ TI_SCI_RESASG_SUBTYPE_GLOBAL_EVENT_SEVT);
+ if (IS_ERR(inta->global_event)) {
+ dev_err(dev, "Global event resource allocation failed\n");
+ return PTR_ERR(inta->global_event);
+ }
+
+ inta->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(inta->base))
+ return PTR_ERR(inta->base);
+
+ ret = ti_sci_inta_get_unmapped_sources(inta);
+ if (ret)
+ return ret;
+
+ domain = irq_domain_add_linear(dev_of_node(dev),
+ ti_sci_get_num_resources(inta->vint),
+ &ti_sci_inta_irq_domain_ops, inta);
+ if (!domain) {
+ dev_err(dev, "Failed to allocate IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),
+ &ti_sci_inta_msi_domain_info,
+ domain);
+ if (!msi_domain) {
+ irq_domain_remove(domain);
+ dev_err(dev, "Failed to allocate msi domain\n");
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&inta->vint_list);
+ mutex_init(&inta->vint_mutex);
+
+ dev_info(dev, "Interrupt Aggregator domain %d created\n", inta->ti_sci_id);
+
+ return 0;
+}
+
+static const struct of_device_id ti_sci_inta_irq_domain_of_match[] = {
+ { .compatible = "ti,sci-inta", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ti_sci_inta_irq_domain_of_match);
+
+static struct platform_driver ti_sci_inta_irq_domain_driver = {
+ .probe = ti_sci_inta_irq_domain_probe,
+ .driver = {
+ .name = "ti-sci-inta",
+ .of_match_table = ti_sci_inta_irq_domain_of_match,
+ },
+};
+module_platform_driver(ti_sci_inta_irq_domain_driver);
+
+MODULE_AUTHOR("Lokesh Vutla <lokeshvutla@ti.com>");
+MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI protocol");
+MODULE_LICENSE("GPL v2");