irqchip/ti-sci-intr: Add support for INTR being a parent to INTR
Driver assumes that Interrupt parent to Interrupt router is always GIC. This is not true always and an Interrupt Router can be a parent to Interrupt Router. Update the driver to detect the parent and request the parent irqs accordingly. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200806074826.24607-7-lokeshvutla@ti.com
This commit is contained in:
Lokesh Vutla
Marc Zyngier
parent
b8713af858
commit
a5b659bd4b
@ -17,29 +17,20 @@
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#include <linux/of_irq.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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#define TI_SCI_DEV_ID_MASK 0xffff
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#define TI_SCI_DEV_ID_SHIFT 16
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#define TI_SCI_IRQ_ID_MASK 0xffff
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#define TI_SCI_IRQ_ID_SHIFT 0
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#define HWIRQ_TO_DEVID(hwirq) (((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
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(TI_SCI_DEV_ID_MASK))
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#define HWIRQ_TO_IRQID(hwirq) ((hwirq) & (TI_SCI_IRQ_ID_MASK))
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#define TO_HWIRQ(dev, index) ((((dev) & TI_SCI_DEV_ID_MASK) << \
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TI_SCI_DEV_ID_SHIFT) | \
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((index) & TI_SCI_IRQ_ID_MASK))
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/**
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* struct ti_sci_intr_irq_domain - Structure representing a TISCI based
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* Interrupt Router IRQ domain.
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* @sci: Pointer to TISCI handle
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* @dst_irq: TISCI resource pointer representing GIC irq controller.
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* @dst_id: TISCI device ID of the GIC irq controller.
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* @out_irqs: TISCI resource pointer representing INTR irqs.
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* @dev: Struct device pointer.
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* @ti_sci_id: TI-SCI device identifier
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* @type: Specifies the trigger type supported by this Interrupt Router
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*/
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struct ti_sci_intr_irq_domain {
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const struct ti_sci_handle *sci;
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struct ti_sci_resource *dst_irq;
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u32 dst_id;
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struct ti_sci_resource *out_irqs;
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struct device *dev;
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u32 ti_sci_id;
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u32 type;
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};
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@ -70,15 +61,44 @@ static int ti_sci_intr_irq_domain_translate(struct irq_domain *domain,
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{
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struct ti_sci_intr_irq_domain *intr = domain->host_data;
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if (fwspec->param_count != 2)
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if (fwspec->param_count != 1)
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return -EINVAL;
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*hwirq = TO_HWIRQ(fwspec->param[0], fwspec->param[1]);
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*hwirq = fwspec->param[0];
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*type = intr->type;
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return 0;
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}
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/**
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* ti_sci_intr_xlate_irq() - Translate hwirq to parent's hwirq.
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* @intr: IRQ domain corresponding to Interrupt Router
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* @irq: Hardware irq corresponding to the above irq domain
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*
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* Return parent irq number if translation is available else -ENOENT.
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*/
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static int ti_sci_intr_xlate_irq(struct ti_sci_intr_irq_domain *intr, u32 irq)
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{
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struct device_node *np = dev_of_node(intr->dev);
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u32 base, pbase, size, len;
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const __be32 *range;
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range = of_get_property(np, "ti,interrupt-ranges", &len);
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if (!range)
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return irq;
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for (len /= sizeof(*range); len >= 3; len -= 3) {
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base = be32_to_cpu(*range++);
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pbase = be32_to_cpu(*range++);
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size = be32_to_cpu(*range++);
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if (base <= irq && irq < base + size)
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return irq - base + pbase;
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}
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return -ENOENT;
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}
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/**
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* ti_sci_intr_irq_domain_free() - Free the specified IRQs from the domain.
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* @domain: Domain to which the irqs belong
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@ -89,66 +109,76 @@ static void ti_sci_intr_irq_domain_free(struct irq_domain *domain,
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unsigned int virq, unsigned int nr_irqs)
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{
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struct ti_sci_intr_irq_domain *intr = domain->host_data;
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struct irq_data *data, *parent_data;
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u16 dev_id, irq_index;
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struct irq_data *data;
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int out_irq;
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parent_data = irq_domain_get_irq_data(domain->parent, virq);
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data = irq_domain_get_irq_data(domain, virq);
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irq_index = HWIRQ_TO_IRQID(data->hwirq);
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dev_id = HWIRQ_TO_DEVID(data->hwirq);
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out_irq = (uintptr_t)data->chip_data;
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intr->sci->ops.rm_irq_ops.free_irq(intr->sci, dev_id, irq_index,
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intr->dst_id, parent_data->hwirq);
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ti_sci_release_resource(intr->dst_irq, parent_data->hwirq);
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intr->sci->ops.rm_irq_ops.free_irq(intr->sci,
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intr->ti_sci_id, data->hwirq,
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intr->ti_sci_id, out_irq);
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ti_sci_release_resource(intr->out_irqs, out_irq);
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irq_domain_free_irqs_parent(domain, virq, 1);
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irq_domain_reset_irq_data(data);
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}
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/**
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* ti_sci_intr_alloc_gic_irq() - Allocate GIC specific IRQ
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* ti_sci_intr_alloc_parent_irq() - Allocate parent IRQ
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* @domain: Pointer to the interrupt router IRQ domain
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* @virq: Corresponding Linux virtual IRQ number
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* @hwirq: Corresponding hwirq for the IRQ within this IRQ domain
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*
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* Returns 0 if all went well else appropriate error pointer.
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* Returns parent irq if all went well else appropriate error pointer.
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*/
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static int ti_sci_intr_alloc_gic_irq(struct irq_domain *domain,
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unsigned int virq, u32 hwirq)
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static int ti_sci_intr_alloc_parent_irq(struct irq_domain *domain,
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unsigned int virq, u32 hwirq)
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{
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struct ti_sci_intr_irq_domain *intr = domain->host_data;
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struct device_node *parent_node;
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struct irq_fwspec fwspec;
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u16 dev_id, irq_index;
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u16 dst_irq;
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int err;
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u16 out_irq, p_hwirq;
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int err = 0;
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dev_id = HWIRQ_TO_DEVID(hwirq);
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irq_index = HWIRQ_TO_IRQID(hwirq);
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dst_irq = ti_sci_get_free_resource(intr->dst_irq);
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if (dst_irq == TI_SCI_RESOURCE_NULL)
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out_irq = ti_sci_get_free_resource(intr->out_irqs);
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if (out_irq == TI_SCI_RESOURCE_NULL)
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return -EINVAL;
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fwspec.fwnode = domain->parent->fwnode;
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fwspec.param_count = 3;
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fwspec.param[0] = 0; /* SPI */
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fwspec.param[1] = dst_irq - 32; /* SPI offset */
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fwspec.param[2] = intr->type;
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p_hwirq = ti_sci_intr_xlate_irq(intr, out_irq);
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if (p_hwirq < 0)
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goto err_irqs;
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parent_node = of_irq_find_parent(dev_of_node(intr->dev));
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fwspec.fwnode = of_node_to_fwnode(parent_node);
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if (of_device_is_compatible(parent_node, "arm,gic-v3")) {
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/* Parent is GIC */
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fwspec.param_count = 3;
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fwspec.param[0] = 0; /* SPI */
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fwspec.param[1] = p_hwirq - 32; /* SPI offset */
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fwspec.param[2] = intr->type;
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} else {
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/* Parent is Interrupt Router */
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fwspec.param_count = 1;
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fwspec.param[0] = p_hwirq;
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}
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err = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec);
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if (err)
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goto err_irqs;
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err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci, dev_id, irq_index,
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intr->dst_id, dst_irq);
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err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci,
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intr->ti_sci_id, hwirq,
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intr->ti_sci_id, out_irq);
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if (err)
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goto err_msg;
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return 0;
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return p_hwirq;
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err_msg:
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irq_domain_free_irqs_parent(domain, virq, 1);
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err_irqs:
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ti_sci_release_resource(intr->dst_irq, dst_irq);
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ti_sci_release_resource(intr->out_irqs, out_irq);
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return err;
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}
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@ -168,18 +198,19 @@ static int ti_sci_intr_irq_domain_alloc(struct irq_domain *domain,
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struct irq_fwspec *fwspec = data;
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unsigned long hwirq;
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unsigned int flags;
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int err;
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int err, p_hwirq;
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err = ti_sci_intr_irq_domain_translate(domain, fwspec, &hwirq, &flags);
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if (err)
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return err;
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err = ti_sci_intr_alloc_gic_irq(domain, virq, hwirq);
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if (err)
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return err;
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p_hwirq = ti_sci_intr_alloc_parent_irq(domain, virq, hwirq);
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if (p_hwirq < 0)
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return p_hwirq;
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irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
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&ti_sci_intr_irq_chip, NULL);
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&ti_sci_intr_irq_chip,
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(void *)(uintptr_t)p_hwirq);
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return 0;
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}
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@ -214,6 +245,7 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
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if (!intr)
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return -ENOMEM;
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intr->dev = dev;
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ret = of_property_read_u32(dev_of_node(dev), "ti,intr-trigger-type",
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&intr->type);
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if (ret) {
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@ -230,19 +262,19 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
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return ret;
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}
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ret = of_property_read_u32(dev_of_node(dev), "ti,sci-dst-id",
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&intr->dst_id);
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ret = of_property_read_u32(dev_of_node(dev), "ti,sci-dev-id",
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&intr->ti_sci_id);
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if (ret) {
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dev_err(dev, "missing 'ti,sci-dst-id' property\n");
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dev_err(dev, "missing 'ti,sci-dev-id' property\n");
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return -EINVAL;
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}
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intr->dst_irq = devm_ti_sci_get_of_resource(intr->sci, dev,
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intr->dst_id,
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"ti,sci-rm-range-girq");
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if (IS_ERR(intr->dst_irq)) {
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intr->out_irqs = devm_ti_sci_get_resource(intr->sci, dev,
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intr->ti_sci_id,
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TI_SCI_RESASG_SUBTYPE_IR_OUTPUT);
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if (IS_ERR(intr->out_irqs)) {
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dev_err(dev, "Destination irq resource allocation failed\n");
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return PTR_ERR(intr->dst_irq);
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return PTR_ERR(intr->out_irqs);
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}
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domain = irq_domain_add_hierarchy(parent_domain, 0, 0, dev_of_node(dev),
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@ -252,6 +284,8 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
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return -ENOMEM;
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}
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dev_info(dev, "Interrupt Router %d domain created\n", intr->ti_sci_id);
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return 0;
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}
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