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Subject[PATCH v2 6/8] [PATCH] MIPS: OCTEON: Add support for OCTEON III interrupt controller.
Date
From: David Daney <david.daney@cavium.com>

Add irq_chip support for both IPI and "normal" interrupts of the CIU3
controller. Document the device tree binding for the CIU3.

Some functions are non-static as they will be used by follow-on
support for MSI-X.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
---
.../devicetree/bindings/mips/cavium/ciu3.txt | 27 +
arch/mips/cavium-octeon/octeon-irq.c | 650 ++++++++++++++++++++-
arch/mips/include/asm/octeon/octeon.h | 19 +
3 files changed, 695 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/mips/cavium/ciu3.txt

diff --git a/Documentation/devicetree/bindings/mips/cavium/ciu3.txt b/Documentation/devicetree/bindings/mips/cavium/ciu3.txt
new file mode 100644
index 0000000..616862a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/cavium/ciu3.txt
@@ -0,0 +1,27 @@
+* Central Interrupt Unit v3
+
+Properties:
+- compatible: "cavium,octeon-7890-ciu3"
+
+ Compatibility with 78XX and 73XX SOCs.
+
+- interrupt-controller: This is an interrupt controller.
+
+- reg: The base address of the CIU's register bank.
+
+- #interrupt-cells: Must be <2>. The first cell is source number.
+ The second cell indicates the triggering semantics, and may have a
+ value of either 4 for level semantics, or 1 for edge semantics.
+
+Example:
+ interrupt-controller@1010000000000 {
+ compatible = "cavium,octeon-7890-ciu3";
+ interrupt-controller;
+ /* Interrupts are specified by two parts:
+ * 1) Source number (20 significant bits)
+ * 2) Trigger type: (4 == level, 1 == edge)
+ */
+ #address-cells = <0>;
+ #interrupt-cells = <2>;
+ reg = <0x10100 0x00000000 0x0 0xb0000000>;
+ };
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index bc30d3a..9b6a65b 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -19,15 +19,52 @@

#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-ciu2-defs.h>
+#include <asm/octeon/cvmx-ciu3-defs.h>

static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
+static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip2);
+
+static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip3);
+static DEFINE_PER_CPU(struct octeon_ciu3_info *, octeon_ciu3_info);
+#define CIU3_MBOX_PER_CORE 10
+
+/*
+ * The 8 most significant bits of the intsn identify the interrupt major block.
+ * Each major block might use its own interrupt domain. Thus 256 domains are
+ * needed.
+ */
+#define MAX_CIU3_DOMAINS 256
+
+typedef irq_hw_number_t (*octeon_ciu3_intsn2hw_t)(struct irq_domain *, unsigned int);
+
+/* Information for each ciu3 in the system */
+struct octeon_ciu3_info {
+ u64 ciu3_addr;
+ int node;
+ struct irq_domain *domain[MAX_CIU3_DOMAINS];
+ octeon_ciu3_intsn2hw_t intsn2hw[MAX_CIU3_DOMAINS];
+};
+
+/* Each ciu3 in the system uses its own data (one ciu3 per node) */
+static struct octeon_ciu3_info *octeon_ciu3_info_per_node[4];

struct octeon_irq_ciu_domain_data {
int num_sum; /* number of sum registers (2 or 3). */
};

+/* Register offsets from ciu3_addr */
+#define CIU3_CONST 0x220
+#define CIU3_IDT_CTL(_idt) ((_idt) * 8 + 0x110000)
+#define CIU3_IDT_PP(_idt, _idx) ((_idt) * 32 + (_idx) * 8 + 0x120000)
+#define CIU3_IDT_IO(_idt) ((_idt) * 8 + 0x130000)
+#define CIU3_DEST_PP_INT(_pp_ip) ((_pp_ip) * 8 + 0x200000)
+#define CIU3_DEST_IO_INT(_io) ((_io) * 8 + 0x210000)
+#define CIU3_ISC_CTL(_intsn) ((_intsn) * 8 + 0x80000000)
+#define CIU3_ISC_W1C(_intsn) ((_intsn) * 8 + 0x90000000)
+#define CIU3_ISC_W1S(_intsn) ((_intsn) * 8 + 0xa0000000)
+
static __read_mostly int octeon_irq_ciu_to_irq[8][64];

struct octeon_ciu_chip_data {
@@ -39,10 +76,11 @@ struct octeon_ciu_chip_data {
struct { /* only used for ciu/ciu2 */
u8 line;
u8 bit;
- u8 gpio_line;
};
};
+ int gpio_line;
int current_cpu; /* Next CPU expected to take this irq */
+ int ciu_node; /* NUMA node number of the CIU */
};

struct octeon_core_chip_data {
@@ -626,6 +664,18 @@ static void octeon_irq_ciu_enable_all_v2(struct irq_data *data)
}
}

+static int octeon_irq_ciu_set_type(struct irq_data *data, unsigned int t)
+{
+ irqd_set_trigger_type(data, t);
+
+ if (t & IRQ_TYPE_EDGE_BOTH)
+ irq_set_handler_locked(data, handle_edge_irq);
+ else
+ irq_set_handler_locked(data, handle_level_irq);
+
+ return IRQ_SET_MASK_OK;
+}
+
static void octeon_irq_gpio_setup(struct irq_data *data)
{
union cvmx_gpio_bit_cfgx cfg;
@@ -863,6 +913,16 @@ static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data,
}
#endif

+static unsigned int edge_startup(struct irq_data *data)
+{
+ /* ack any pending edge-irq at startup, so there is
+ * an _edge_ to fire on when the event reappears.
+ */
+ data->chip->irq_ack(data);
+ data->chip->irq_enable(data);
+ return 0;
+}
+
/*
* Newer octeon chips have support for lockless CIU operation.
*/
@@ -2271,10 +2331,598 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
return 0;
}

+int octeon_irq_ciu3_xlat(struct irq_domain *d,
+ struct device_node *node,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ struct octeon_ciu3_info *ciu3_info = d->host_data;
+ unsigned int hwirq, type, intsn_major;
+ union cvmx_ciu3_iscx_ctl isc;
+
+ if (intsize < 2)
+ return -EINVAL;
+ hwirq = intspec[0];
+ type = intspec[1];
+
+ if (hwirq >= (1 << 20))
+ return -EINVAL;
+
+ intsn_major = hwirq >> 12;
+ switch (intsn_major) {
+ case 0x04: /* Software handled separately. */
+ return -EINVAL;
+ default:
+ break;
+ }
+
+ isc.u64 = cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq));
+ if (!isc.s.imp)
+ return -EINVAL;
+
+ switch (type) {
+ case 4: /* official value for level triggering. */
+ *out_type = IRQ_TYPE_LEVEL_HIGH;
+ break;
+ case 0: /* unofficial value, but we might as well let it work. */
+ case 1: /* official value for edge triggering. */
+ *out_type = IRQ_TYPE_EDGE_RISING;
+ break;
+ default: /* Nothing else is acceptable. */
+ return -EINVAL;
+ }
+
+ *out_hwirq = hwirq;
+
+ return 0;
+}
+
+void octeon_irq_ciu3_enable(struct irq_data *data)
+{
+ int cpu;
+ union cvmx_ciu3_iscx_ctl isc_ctl;
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_ctl_addr;
+
+ struct octeon_ciu_chip_data *cd;
+
+ cpu = next_cpu_for_irq(data);
+
+ cd = irq_data_get_irq_chip_data(data);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+ cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
+
+ isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
+ isc_ctl.u64 = 0;
+ isc_ctl.s.en = 1;
+ isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
+ cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
+ cvmx_read_csr(isc_ctl_addr);
+}
+
+void octeon_irq_ciu3_disable(struct irq_data *data)
+{
+ u64 isc_ctl_addr;
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+
+ struct octeon_ciu_chip_data *cd;
+
+ cd = irq_data_get_irq_chip_data(data);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+
+ isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
+ cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
+ cvmx_write_csr(isc_ctl_addr, 0);
+ cvmx_read_csr(isc_ctl_addr);
+}
+
+void octeon_irq_ciu3_ack(struct irq_data *data)
+{
+ u64 isc_w1c_addr;
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ struct octeon_ciu_chip_data *cd;
+ u32 trigger_type = irqd_get_trigger_type(data);
+
+ /*
+ * We use a single irq_chip, so we have to do nothing to ack a
+ * level interrupt.
+ */
+ if (!(trigger_type & IRQ_TYPE_EDGE_BOTH))
+ return;
+
+ cd = irq_data_get_irq_chip_data(data);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.raw = 1;
+
+ isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+}
+
+void octeon_irq_ciu3_mask(struct irq_data *data)
+{
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_w1c_addr;
+ struct octeon_ciu_chip_data *cd;
+
+ cd = irq_data_get_irq_chip_data(data);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+
+ isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+}
+
+void octeon_irq_ciu3_mask_ack(struct irq_data *data)
+{
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_w1c_addr;
+ struct octeon_ciu_chip_data *cd;
+ u32 trigger_type = irqd_get_trigger_type(data);
+
+ cd = irq_data_get_irq_chip_data(data);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+
+ /*
+ * We use a single irq_chip, so only ack an edge (!level)
+ * interrupt.
+ */
+ if (trigger_type & IRQ_TYPE_EDGE_BOTH)
+ isc_w1c.s.raw = 1;
+
+ isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+}
+
+#ifdef CONFIG_SMP
+int octeon_irq_ciu3_set_affinity(struct irq_data *data,
+ const struct cpumask *dest, bool force)
+{
+ union cvmx_ciu3_iscx_ctl isc_ctl;
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_ctl_addr;
+ int cpu;
+ bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
+ struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
+
+ if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node)))
+ return -EINVAL;
+
+ if (!enable_one)
+ return IRQ_SET_MASK_OK;
+
+ cd = irq_data_get_irq_chip_data(data);
+ cpu = cpumask_first(dest);
+ if (cpu >= nr_cpu_ids)
+ cpu = smp_processor_id();
+ cd->current_cpu = cpu;
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+ cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
+
+ isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
+ isc_ctl.u64 = 0;
+ isc_ctl.s.en = 1;
+ isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
+ cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
+ cvmx_read_csr(isc_ctl_addr);
+
+ return IRQ_SET_MASK_OK;
+}
+#endif
+
+static struct irq_chip octeon_irq_chip_ciu3 = {
+ .name = "CIU3",
+ .irq_startup = edge_startup,
+ .irq_enable = octeon_irq_ciu3_enable,
+ .irq_disable = octeon_irq_ciu3_disable,
+ .irq_ack = octeon_irq_ciu3_ack,
+ .irq_mask = octeon_irq_ciu3_mask,
+ .irq_mask_ack = octeon_irq_ciu3_mask_ack,
+ .irq_unmask = octeon_irq_ciu3_enable,
+ .irq_set_type = octeon_irq_ciu_set_type,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = octeon_irq_ciu3_set_affinity,
+ .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
+#endif
+};
+
+int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw, struct irq_chip *chip)
+{
+ struct octeon_ciu3_info *ciu3_info = d->host_data;
+ struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL,
+ ciu3_info->node);
+ if (!cd)
+ return -ENOMEM;
+ cd->intsn = hw;
+ cd->current_cpu = -1;
+ cd->ciu3_addr = ciu3_info->ciu3_addr;
+ cd->ciu_node = ciu3_info->node;
+ irq_set_chip_and_handler(virq, chip, handle_edge_irq);
+ irq_set_chip_data(virq, cd);
+
+ return 0;
+}
+
+static int octeon_irq_ciu3_map(struct irq_domain *d,
+ unsigned int virq, irq_hw_number_t hw)
+{
+ return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3);
+}
+
+static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = {
+ .map = octeon_irq_ciu3_map,
+ .unmap = octeon_irq_free_cd,
+ .xlate = octeon_irq_ciu3_xlat,
+};
+
+static void octeon_irq_ciu3_ip2(void)
+{
+ union cvmx_ciu3_destx_pp_int dest_pp_int;
+ struct octeon_ciu3_info *ciu3_info;
+ u64 ciu3_addr;
+
+ ciu3_info = __this_cpu_read(octeon_ciu3_info);
+ ciu3_addr = ciu3_info->ciu3_addr;
+
+ dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num()));
+
+ if (likely(dest_pp_int.s.intr)) {
+ irq_hw_number_t intsn = dest_pp_int.s.intsn;
+ irq_hw_number_t hw;
+ struct irq_domain *domain;
+ /* Get the domain to use from the major block */
+ int block = intsn >> 12;
+ int ret;
+
+ domain = ciu3_info->domain[block];
+ if (ciu3_info->intsn2hw[block])
+ hw = ciu3_info->intsn2hw[block](domain, intsn);
+ else
+ hw = intsn;
+
+ ret = handle_domain_irq(domain, hw, NULL);
+ if (ret < 0) {
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+ spurious_interrupt();
+ }
+ } else {
+ spurious_interrupt();
+ }
+}
+
+/*
+ * 10 mbox per core starting from zero.
+ * Base mbox is core * 10
+ */
+static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core)
+{
+ /* SW (mbox) are 0x04 in bits 12..19 */
+ return 0x04000 + CIU3_MBOX_PER_CORE * core;
+}
+
+static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox)
+{
+ return octeon_irq_ciu3_base_mbox_intsn(core) + mbox;
+}
+
+static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox)
+{
+ int local_core = octeon_coreid_for_cpu(cpu) & 0x3f;
+
+ return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox);
+}
+
+static void octeon_irq_ciu3_mbox(void)
+{
+ union cvmx_ciu3_destx_pp_int dest_pp_int;
+ struct octeon_ciu3_info *ciu3_info;
+ u64 ciu3_addr;
+ int core = cvmx_get_local_core_num();
+
+ ciu3_info = __this_cpu_read(octeon_ciu3_info);
+ ciu3_addr = ciu3_info->ciu3_addr;
+
+ dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core));
+
+ if (likely(dest_pp_int.s.intr)) {
+ irq_hw_number_t intsn = dest_pp_int.s.intsn;
+ int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core);
+
+ if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) {
+ do_IRQ(mbox + OCTEON_IRQ_MBOX0);
+ } else {
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.en = 1;
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+ spurious_interrupt();
+ }
+ } else {
+ spurious_interrupt();
+ }
+}
+
+void octeon_ciu3_mbox_send(int cpu, unsigned int mbox)
+{
+ struct octeon_ciu3_info *ciu3_info;
+ unsigned int intsn;
+ union cvmx_ciu3_iscx_w1s isc_w1s;
+ u64 isc_w1s_addr;
+
+ if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE))
+ return;
+
+ intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
+ ciu3_info = per_cpu(octeon_ciu3_info, cpu);
+ isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn);
+
+ isc_w1s.u64 = 0;
+ isc_w1s.s.raw = 1;
+
+ cvmx_write_csr(isc_w1s_addr, isc_w1s.u64);
+ cvmx_read_csr(isc_w1s_addr);
+}
+
+static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en)
+{
+ struct octeon_ciu3_info *ciu3_info;
+ unsigned int intsn;
+ u64 isc_ctl_addr, isc_w1c_addr;
+ union cvmx_ciu3_iscx_ctl isc_ctl;
+ unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
+
+ intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
+ ciu3_info = per_cpu(octeon_ciu3_info, cpu);
+ isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
+ isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn);
+
+ isc_ctl.u64 = 0;
+ isc_ctl.s.en = 1;
+
+ cvmx_write_csr(isc_w1c_addr, isc_ctl.u64);
+ cvmx_write_csr(isc_ctl_addr, 0);
+ if (en) {
+ unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu);
+
+ isc_ctl.u64 = 0;
+ isc_ctl.s.en = 1;
+ isc_ctl.s.idt = idt;
+ cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
+ }
+ cvmx_read_csr(isc_ctl_addr);
+}
+
+static void octeon_irq_ciu3_mbox_enable(struct irq_data *data)
+{
+ int cpu;
+ unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
+
+ WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
+
+ for_each_online_cpu(cpu)
+ octeon_irq_ciu3_mbox_set_enable(data, cpu, true);
+}
+
+static void octeon_irq_ciu3_mbox_disable(struct irq_data *data)
+{
+ int cpu;
+ unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
+
+ WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
+
+ for_each_online_cpu(cpu)
+ octeon_irq_ciu3_mbox_set_enable(data, cpu, false);
+}
+
+static void octeon_irq_ciu3_mbox_ack(struct irq_data *data)
+{
+ struct octeon_ciu3_info *ciu3_info;
+ unsigned int intsn;
+ u64 isc_w1c_addr;
+ union cvmx_ciu3_iscx_w1c isc_w1c;
+ unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
+
+ intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox);
+
+ isc_w1c.u64 = 0;
+ isc_w1c.s.raw = 1;
+
+ ciu3_info = __this_cpu_read(octeon_ciu3_info);
+ isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
+ cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
+ cvmx_read_csr(isc_w1c_addr);
+}
+
+static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data)
+{
+ octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true);
+}
+
+static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data)
+{
+ octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false);
+}
+
+static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info)
+{
+ u64 b = ciu3_info->ciu3_addr;
+ int idt_ip2, idt_ip3, idt_ip4;
+ int unused_idt2;
+ int core = cvmx_get_local_core_num();
+ int i;
+
+ __this_cpu_write(octeon_ciu3_info, ciu3_info);
+
+ /*
+ * 4 idt per core starting from 1 because zero is reserved.
+ * Base idt per core is 4 * core + 1
+ */
+ idt_ip2 = core * 4 + 1;
+ idt_ip3 = core * 4 + 2;
+ idt_ip4 = core * 4 + 3;
+ unused_idt2 = core * 4 + 4;
+ __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2);
+ __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3);
+
+ /* ip2 interrupts for this CPU */
+ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0);
+ cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core);
+ cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0);
+
+ /* ip3 interrupts for this CPU */
+ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1);
+ cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core);
+ cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0);
+
+ /* ip4 interrupts for this CPU */
+ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2);
+ cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0);
+ cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0);
+
+ cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0);
+ cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0);
+ cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0);
+
+ for (i = 0; i < CIU3_MBOX_PER_CORE; i++) {
+ unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i);
+
+ cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2);
+ cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0);
+ }
+
+ return 0;
+}
+
+static void octeon_irq_setup_secondary_ciu3(void)
+{
+ struct octeon_ciu3_info *ciu3_info;
+
+ ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()];
+ octeon_irq_ciu3_alloc_resources(ciu3_info);
+ irq_cpu_online();
+
+ /* Enable the CIU lines */
+ set_c0_status(STATUSF_IP3 | STATUSF_IP2);
+ if (octeon_irq_use_ip4)
+ set_c0_status(STATUSF_IP4);
+ else
+ clear_c0_status(STATUSF_IP4);
+}
+
+static struct irq_chip octeon_irq_chip_ciu3_mbox = {
+ .name = "CIU3-M",
+ .irq_enable = octeon_irq_ciu3_mbox_enable,
+ .irq_disable = octeon_irq_ciu3_mbox_disable,
+ .irq_ack = octeon_irq_ciu3_mbox_ack,
+
+ .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online,
+ .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline,
+ .flags = IRQCHIP_ONOFFLINE_ENABLED,
+};
+
+static int __init octeon_irq_init_ciu3(struct device_node *ciu_node,
+ struct device_node *parent)
+{
+ int i;
+ int node;
+ struct irq_domain *domain;
+ struct octeon_ciu3_info *ciu3_info;
+ const __be32 *zero_addr;
+ u64 base_addr;
+ union cvmx_ciu3_const consts;
+
+ node = 0; /* of_node_to_nid(ciu_node); */
+ ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node);
+
+ if (!ciu3_info)
+ return -ENOMEM;
+
+ zero_addr = of_get_address(ciu_node, 0, NULL, NULL);
+ if (WARN_ON(!zero_addr))
+ return -EINVAL;
+
+ base_addr = of_translate_address(ciu_node, zero_addr);
+ base_addr = (u64)phys_to_virt(base_addr);
+
+ ciu3_info->ciu3_addr = base_addr;
+ ciu3_info->node = node;
+
+ consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST);
+
+ octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3;
+
+ octeon_irq_ip2 = octeon_irq_ciu3_ip2;
+ octeon_irq_ip3 = octeon_irq_ciu3_mbox;
+ octeon_irq_ip4 = octeon_irq_ip4_mask;
+
+ if (node == cvmx_get_node_num()) {
+ /* Mips internal */
+ octeon_irq_init_core();
+
+ /* Only do per CPU things if it is the CIU of the boot node. */
+ i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node);
+ WARN_ON(i < 0);
+
+ for (i = 0; i < 8; i++)
+ irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0,
+ &octeon_irq_chip_ciu3_mbox, handle_percpu_irq);
+ }
+
+ /*
+ * Initialize all domains to use the default domain. Specific major
+ * blocks will overwrite the default domain as needed.
+ */
+ domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops,
+ ciu3_info);
+ for (i = 0; i < MAX_CIU3_DOMAINS; i++)
+ ciu3_info->domain[i] = domain;
+
+ octeon_ciu3_info_per_node[node] = ciu3_info;
+
+ if (node == cvmx_get_node_num()) {
+ /* Only do per CPU things if it is the CIU of the boot node. */
+ octeon_irq_ciu3_alloc_resources(ciu3_info);
+ if (node == 0)
+ irq_set_default_host(domain);
+
+ octeon_irq_use_ip4 = false;
+ /* Enable the CIU lines */
+ set_c0_status(STATUSF_IP2 | STATUSF_IP3);
+ clear_c0_status(STATUSF_IP4);
+ }
+
+ return 0;
+}
+
static struct of_device_id ciu_types[] __initdata = {
{.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
{.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
{.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
+ {.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3},
{.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
{}
};
diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h
index de9f74e..53d51ae 100644
--- a/arch/mips/include/asm/octeon/octeon.h
+++ b/arch/mips/include/asm/octeon/octeon.h
@@ -299,6 +299,25 @@ static inline void octeon_npi_write32(uint64_t address, uint32_t val)
cvmx_read64_uint32(address ^ 4);
}

+struct irq_domain;
+struct device_node;
+struct irq_data;
+struct irq_chip;
+void octeon_ciu3_mbox_send(int cpu, unsigned int mbox);
+int octeon_irq_ciu3_xlat(struct irq_domain *d,
+ struct device_node *node,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type);
+void octeon_irq_ciu3_enable(struct irq_data *data);
+void octeon_irq_ciu3_disable(struct irq_data *data);
+void octeon_irq_ciu3_ack(struct irq_data *data);
+void octeon_irq_ciu3_mask(struct irq_data *data);
+void octeon_irq_ciu3_mask_ack(struct irq_data *data);
+int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw, struct irq_chip *chip);
+
/* Octeon multiplier save/restore routines from octeon_switch.S */
void octeon_mult_save(void);
void octeon_mult_restore(void);
--
1.7.11.7
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