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-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/include/asm/pci/bridge.h3
-rw-r--r--arch/mips/include/asm/sn/irq_alloc.h11
-rw-r--r--arch/mips/pci/pci-xtalk-bridge.c178
-rw-r--r--arch/mips/sgi-ip27/ip27-irq.c191
5 files changed, 265 insertions, 119 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0e7a48598b26..d6406c176048 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -675,6 +675,7 @@ config SGI_IP27
select SYS_HAS_EARLY_PRINTK
select HAVE_PCI
select IRQ_MIPS_CPU
+ select IRQ_DOMAIN_HIERARCHY
select NR_CPUS_DEFAULT_64
select PCI_DRIVERS_GENERIC
select PCI_XTALK_BRIDGE
diff --git a/arch/mips/include/asm/pci/bridge.h b/arch/mips/include/asm/pci/bridge.h
index d42b27c97c23..a92cd30b48c9 100644
--- a/arch/mips/include/asm/pci/bridge.h
+++ b/arch/mips/include/asm/pci/bridge.h
@@ -805,6 +805,7 @@ struct bridge_controller {
struct bridge_regs *base;
unsigned long baddr;
unsigned long intr_addr;
+ struct irq_domain *domain;
unsigned int pci_int[8];
nasid_t nasid;
};
@@ -819,6 +820,4 @@ struct bridge_controller {
#define bridge_clr(bc, reg, val) \
__raw_writel(__raw_readl(&bc->base->reg) & ~(val), &bc->base->reg)
-extern int request_bridge_irq(struct bridge_controller *bc, int pin);
-
#endif /* _ASM_PCI_BRIDGE_H */
diff --git a/arch/mips/include/asm/sn/irq_alloc.h b/arch/mips/include/asm/sn/irq_alloc.h
new file mode 100644
index 000000000000..09b89cecff56
--- /dev/null
+++ b/arch/mips/include/asm/sn/irq_alloc.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SN_IRQ_ALLOC_H
+#define __ASM_SN_IRQ_ALLOC_H
+
+struct irq_alloc_info {
+ void *ctrl;
+ nasid_t nasid;
+ int pin;
+};
+
+#endif /* __ASM_SN_IRQ_ALLOC_H */
diff --git a/arch/mips/pci/pci-xtalk-bridge.c b/arch/mips/pci/pci-xtalk-bridge.c
index 8f481984ab6e..bcf7f559789a 100644
--- a/arch/mips/pci/pci-xtalk-bridge.c
+++ b/arch/mips/pci/pci-xtalk-bridge.c
@@ -14,7 +14,7 @@
#include <asm/pci/bridge.h>
#include <asm/paccess.h>
-#include <asm/sn/intr.h>
+#include <asm/sn/irq_alloc.h>
/*
* Most of the IOC3 PCI config register aren't present
@@ -310,6 +310,135 @@ static struct pci_ops bridge_pci_ops = {
.write = pci_write_config,
};
+struct bridge_irq_chip_data {
+ struct bridge_controller *bc;
+ nasid_t nasid;
+};
+
+static int bridge_set_affinity(struct irq_data *d, const struct cpumask *mask,
+ bool force)
+{
+#ifdef CONFIG_NUMA
+ struct bridge_irq_chip_data *data = d->chip_data;
+ int bit = d->parent_data->hwirq;
+ int pin = d->hwirq;
+ nasid_t nasid;
+ int ret, cpu;
+
+ ret = irq_chip_set_affinity_parent(d, mask, force);
+ if (ret >= 0) {
+ cpu = cpumask_first_and(mask, cpu_online_mask);
+ nasid = COMPACT_TO_NASID_NODEID(cpu_to_node(cpu));
+ bridge_write(data->bc, b_int_addr[pin].addr,
+ (((data->bc->intr_addr >> 30) & 0x30000) |
+ bit | (nasid << 8)));
+ bridge_read(data->bc, b_wid_tflush);
+ }
+ return ret;
+#else
+ return irq_chip_set_affinity_parent(d, mask, force);
+#endif
+}
+
+struct irq_chip bridge_irq_chip = {
+ .name = "BRIDGE",
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_set_affinity = bridge_set_affinity
+};
+
+static int bridge_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ struct bridge_irq_chip_data *data;
+ struct irq_alloc_info *info = arg;
+ int ret;
+
+ if (nr_irqs > 1 || !info)
+ return -EINVAL;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
+ if (ret >= 0) {
+ data->bc = info->ctrl;
+ data->nasid = info->nasid;
+ irq_domain_set_info(domain, virq, info->pin, &bridge_irq_chip,
+ data, handle_level_irq, NULL, NULL);
+ } else {
+ kfree(data);
+ }
+
+ return ret;
+}
+
+static void bridge_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct irq_data *irqd = irq_domain_get_irq_data(domain, virq);
+
+ if (nr_irqs)
+ return;
+
+ kfree(irqd->chip_data);
+ irq_domain_free_irqs_top(domain, virq, nr_irqs);
+}
+
+static int bridge_domain_activate(struct irq_domain *domain,
+ struct irq_data *irqd, bool reserve)
+{
+ struct bridge_irq_chip_data *data = irqd->chip_data;
+ struct bridge_controller *bc = data->bc;
+ int bit = irqd->parent_data->hwirq;
+ int pin = irqd->hwirq;
+ u32 device;
+
+ bridge_write(bc, b_int_addr[pin].addr,
+ (((bc->intr_addr >> 30) & 0x30000) |
+ bit | (data->nasid << 8)));
+ bridge_set(bc, b_int_enable, (1 << pin));
+ bridge_set(bc, b_int_enable, 0x7ffffe00); /* more stuff in int_enable */
+
+ /*
+ * Enable sending of an interrupt clear packt to the hub on a high to
+ * low transition of the interrupt pin.
+ *
+ * IRIX sets additional bits in the address which are documented as
+ * reserved in the bridge docs.
+ */
+ bridge_set(bc, b_int_mode, (1UL << pin));
+
+ /*
+ * We assume the bridge to have a 1:1 mapping between devices
+ * (slots) and intr pins.
+ */
+ device = bridge_read(bc, b_int_device);
+ device &= ~(7 << (pin*3));
+ device |= (pin << (pin*3));
+ bridge_write(bc, b_int_device, device);
+
+ bridge_read(bc, b_wid_tflush);
+ return 0;
+}
+
+static void bridge_domain_deactivate(struct irq_domain *domain,
+ struct irq_data *irqd)
+{
+ struct bridge_irq_chip_data *data = irqd->chip_data;
+
+ bridge_clr(data->bc, b_int_enable, (1 << irqd->hwirq));
+ bridge_read(data->bc, b_wid_tflush);
+}
+
+static const struct irq_domain_ops bridge_domain_ops = {
+ .alloc = bridge_domain_alloc,
+ .free = bridge_domain_free,
+ .activate = bridge_domain_activate,
+ .deactivate = bridge_domain_deactivate
+};
+
/*
* All observed requests have pin == 1. We could have a global here, that
* gets incremented and returned every time - unfortunately, pci_map_irq
@@ -322,11 +451,16 @@ static struct pci_ops bridge_pci_ops = {
static int bridge_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct bridge_controller *bc = BRIDGE_CONTROLLER(dev->bus);
+ struct irq_alloc_info info;
int irq;
irq = bc->pci_int[slot];
if (irq == -1) {
- irq = request_bridge_irq(bc, slot);
+ info.ctrl = bc;
+ info.nasid = bc->nasid;
+ info.pin = slot;
+
+ irq = irq_domain_alloc_irqs(bc->domain, 1, bc->nasid, &info);
if (irq < 0)
return irq;
@@ -337,18 +471,34 @@ static int bridge_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
static int bridge_probe(struct platform_device *pdev)
{
+ struct xtalk_bridge_platform_data *bd = dev_get_platdata(&pdev->dev);
struct device *dev = &pdev->dev;
struct bridge_controller *bc;
struct pci_host_bridge *host;
+ struct irq_domain *domain, *parent;
+ struct fwnode_handle *fn;
int slot;
int err;
- struct xtalk_bridge_platform_data *bd = dev_get_platdata(&pdev->dev);
+
+ parent = irq_get_default_host();
+ if (!parent)
+ return -ENODEV;
+ fn = irq_domain_alloc_named_fwnode("BRIDGE");
+ if (!fn)
+ return -ENOMEM;
+ domain = irq_domain_create_hierarchy(parent, 0, 8, fn,
+ &bridge_domain_ops, NULL);
+ irq_domain_free_fwnode(fn);
+ if (!domain)
+ return -ENOMEM;
pci_set_flags(PCI_PROBE_ONLY);
host = devm_pci_alloc_host_bridge(dev, sizeof(*bc));
- if (!host)
- return -ENOMEM;
+ if (!host) {
+ err = -ENOMEM;
+ goto err_remove_domain;
+ }
bc = pci_host_bridge_priv(host);
@@ -357,15 +507,15 @@ static int bridge_probe(struct platform_device *pdev)
bc->busn.end = 0xff;
bc->busn.flags = IORESOURCE_BUS;
+ bc->domain = domain;
+
pci_add_resource_offset(&host->windows, &bd->mem, bd->mem_offset);
pci_add_resource_offset(&host->windows, &bd->io, bd->io_offset);
pci_add_resource(&host->windows, &bc->busn);
err = devm_request_pci_bus_resources(dev, &host->windows);
- if (err < 0) {
- pci_free_resource_list(&host->windows);
- return err;
- }
+ if (err < 0)
+ goto err_free_resource;
bc->nasid = bd->nasid;
@@ -419,7 +569,7 @@ static int bridge_probe(struct platform_device *pdev)
err = pci_scan_root_bus_bridge(host);
if (err < 0)
- return err;
+ goto err_free_resource;
pci_bus_claim_resources(host->bus);
pci_bus_add_devices(host->bus);
@@ -427,12 +577,20 @@ static int bridge_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, host->bus);
return 0;
+
+err_free_resource:
+ pci_free_resource_list(&host->windows);
+err_remove_domain:
+ irq_domain_remove(domain);
+ return err;
}
static int bridge_remove(struct platform_device *pdev)
{
struct pci_bus *bus = platform_get_drvdata(pdev);
+ struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
+ irq_domain_remove(bc->domain);
pci_lock_rescan_remove();
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index 710a59764b01..37be04975831 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -12,22 +12,20 @@
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
+#include <linux/sched.h>
#include <asm/io.h>
#include <asm/irq_cpu.h>
-#include <asm/pci/bridge.h>
#include <asm/sn/addrs.h>
#include <asm/sn/agent.h>
#include <asm/sn/arch.h>
#include <asm/sn/hub.h>
#include <asm/sn/intr.h>
+#include <asm/sn/irq_alloc.h>
struct hub_irq_data {
- struct bridge_controller *bc;
u64 *irq_mask[2];
cpuid_t cpu;
- int bit;
- int pin;
};
static DECLARE_BITMAP(hub_irq_map, IP27_HUB_IRQ_COUNT);
@@ -54,7 +52,7 @@ static void enable_hub_irq(struct irq_data *d)
struct hub_irq_data *hd = irq_data_get_irq_chip_data(d);
unsigned long *mask = per_cpu(irq_enable_mask, hd->cpu);
- set_bit(hd->bit, mask);
+ set_bit(d->hwirq, mask);
__raw_writeq(mask[0], hd->irq_mask[0]);
__raw_writeq(mask[1], hd->irq_mask[1]);
}
@@ -64,72 +62,11 @@ static void disable_hub_irq(struct irq_data *d)
struct hub_irq_data *hd = irq_data_get_irq_chip_data(d);
unsigned long *mask = per_cpu(irq_enable_mask, hd->cpu);
- clear_bit(hd->bit, mask);
+ clear_bit(d->hwirq, mask);
__raw_writeq(mask[0], hd->irq_mask[0]);
__raw_writeq(mask[1], hd->irq_mask[1]);
}
-static unsigned int startup_bridge_irq(struct irq_data *d)
-{
- struct hub_irq_data *hd = irq_data_get_irq_chip_data(d);
- struct bridge_controller *bc;
- nasid_t nasid;
- u32 device;
- int pin;
-
- if (!hd)
- return -EINVAL;
-
- pin = hd->pin;
- bc = hd->bc;
-
- nasid = COMPACT_TO_NASID_NODEID(cpu_to_node(hd->cpu));
- bridge_write(bc, b_int_addr[pin].addr,
- (0x20000 | hd->bit | (nasid << 8)));
- bridge_set(bc, b_int_enable, (1 << pin));
- bridge_set(bc, b_int_enable, 0x7ffffe00); /* more stuff in int_enable */
-
- /*
- * Enable sending of an interrupt clear packt to the hub on a high to
- * low transition of the interrupt pin.
- *
- * IRIX sets additional bits in the address which are documented as
- * reserved in the bridge docs.
- */
- bridge_set(bc, b_int_mode, (1UL << pin));
-
- /*
- * We assume the bridge to have a 1:1 mapping between devices
- * (slots) and intr pins.
- */
- device = bridge_read(bc, b_int_device);
- device &= ~(7 << (pin*3));
- device |= (pin << (pin*3));
- bridge_write(bc, b_int_device, device);
-
- bridge_read(bc, b_wid_tflush);
-
- enable_hub_irq(d);
-
- return 0; /* Never anything pending. */
-}
-
-static void shutdown_bridge_irq(struct irq_data *d)
-{
- struct hub_irq_data *hd = irq_data_get_irq_chip_data(d);
- struct bridge_controller *bc;
- int pin = hd->pin;
-
- if (!hd)
- return;
-
- disable_hub_irq(d);
-
- bc = hd->bc;
- bridge_clr(bc, b_int_enable, (1 << pin));
- bridge_read(bc, b_wid_tflush);
-}
-
static void setup_hub_mask(struct hub_irq_data *hd, const struct cpumask *mask)
{
nasid_t nasid;
@@ -145,9 +82,6 @@ static void setup_hub_mask(struct hub_irq_data *hd, const struct cpumask *mask)
hd->irq_mask[0] = REMOTE_HUB_PTR(nasid, PI_INT_MASK0_B);
hd->irq_mask[1] = REMOTE_HUB_PTR(nasid, PI_INT_MASK1_B);
}
-
- /* Make sure it's not already pending when we connect it. */
- REMOTE_HUB_CLR_INTR(nasid, hd->bit);
}
static int set_affinity_hub_irq(struct irq_data *d, const struct cpumask *mask,
@@ -164,7 +98,7 @@ static int set_affinity_hub_irq(struct irq_data *d, const struct cpumask *mask,
setup_hub_mask(hd, mask);
if (irqd_is_started(d))
- startup_bridge_irq(d);
+ enable_hub_irq(d);
irq_data_update_effective_affinity(d, cpumask_of(hd->cpu));
@@ -173,20 +107,22 @@ static int set_affinity_hub_irq(struct irq_data *d, const struct cpumask *mask,
static struct irq_chip hub_irq_type = {
.name = "HUB",
- .irq_startup = startup_bridge_irq,
- .irq_shutdown = shutdown_bridge_irq,
.irq_mask = disable_hub_irq,
.irq_unmask = enable_hub_irq,
.irq_set_affinity = set_affinity_hub_irq,
};
-int request_bridge_irq(struct bridge_controller *bc, int pin)
+static int hub_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
{
+ struct irq_alloc_info *info = arg;
struct hub_irq_data *hd;
struct hub_data *hub;
struct irq_desc *desc;
int swlevel;
- int irq;
+
+ if (nr_irqs > 1 || !info)
+ return -EINVAL;
hd = kzalloc(sizeof(*hd), GFP_KERNEL);
if (!hd)
@@ -197,46 +133,41 @@ int request_bridge_irq(struct bridge_controller *bc, int pin)
kfree(hd);
return -EAGAIN;
}
- irq = swlevel + IP27_HUB_IRQ_BASE;
-
- hd->bc = bc;
- hd->bit = swlevel;
- hd->pin = pin;
- irq_set_chip_data(irq, hd);
+ irq_domain_set_info(domain, virq, swlevel, &hub_irq_type, hd,
+ handle_level_irq, NULL, NULL);
/* use CPU connected to nearest hub */
- hub = hub_data(NASID_TO_COMPACT_NODEID(bc->nasid));
+ hub = hub_data(NASID_TO_COMPACT_NODEID(info->nasid));
setup_hub_mask(hd, &hub->h_cpus);
- desc = irq_to_desc(irq);
- desc->irq_common_data.node = bc->nasid;
+ /* Make sure it's not already pending when we connect it. */
+ REMOTE_HUB_CLR_INTR(info->nasid, swlevel);
+
+ desc = irq_to_desc(virq);
+ desc->irq_common_data.node = info->nasid;
cpumask_copy(desc->irq_common_data.affinity, &hub->h_cpus);
- return irq;
+ return 0;
}
-void ip27_hub_irq_init(void)
+static void hub_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
{
- int i;
+ struct irq_data *irqd;
- for (i = IP27_HUB_IRQ_BASE;
- i < (IP27_HUB_IRQ_BASE + IP27_HUB_IRQ_COUNT); i++)
- irq_set_chip_and_handler(i, &hub_irq_type, handle_level_irq);
-
- /*
- * Some interrupts are reserved by hardware or by software convention.
- * Mark these as reserved right away so they won't be used accidentally
- * later.
- */
- for (i = 0; i <= BASE_PCI_IRQ; i++)
- set_bit(i, hub_irq_map);
-
- set_bit(IP_PEND0_6_63, hub_irq_map);
+ if (nr_irqs > 1)
+ return;
- for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++)
- set_bit(i, hub_irq_map);
+ irqd = irq_domain_get_irq_data(domain, virq);
+ if (irqd && irqd->chip_data)
+ kfree(irqd->chip_data);
}
+static const struct irq_domain_ops hub_domain_ops = {
+ .alloc = hub_domain_alloc,
+ .free = hub_domain_free,
+};
+
/*
* This code is unnecessarily complex, because we do
* intr enabling. Basically, once we grab the set of intrs we need
@@ -253,7 +184,9 @@ static void ip27_do_irq_mask0(struct irq_desc *desc)
{
cpuid_t cpu = smp_processor_id();
unsigned long *mask = per_cpu(irq_enable_mask, cpu);
+ struct irq_domain *domain;
u64 pend0;
+ int irq;
/* copied from Irix intpend0() */
pend0 = LOCAL_HUB_L(PI_INT_PEND0);
@@ -277,7 +210,14 @@ static void ip27_do_irq_mask0(struct irq_desc *desc)
generic_smp_call_function_interrupt();
} else
#endif
- generic_handle_irq(__ffs(pend0) + IP27_HUB_IRQ_BASE);
+ {
+ domain = irq_desc_get_handler_data(desc);
+ irq = irq_linear_revmap(domain, __ffs(pend0));
+ if (irq)
+ generic_handle_irq(irq);
+ else
+ spurious_interrupt();
+ }
LOCAL_HUB_L(PI_INT_PEND0);
}
@@ -286,7 +226,9 @@ static void ip27_do_irq_mask1(struct irq_desc *desc)
{
cpuid_t cpu = smp_processor_id();
unsigned long *mask = per_cpu(irq_enable_mask, cpu);
+ struct irq_domain *domain;
u64 pend1;
+ int irq;
/* copied from Irix intpend0() */
pend1 = LOCAL_HUB_L(PI_INT_PEND1);
@@ -295,7 +237,12 @@ static void ip27_do_irq_mask1(struct irq_desc *desc)
if (!pend1)
return;
- generic_handle_irq(__ffs(pend1) + IP27_HUB_IRQ_BASE + 64);
+ domain = irq_desc_get_handler_data(desc);
+ irq = irq_linear_revmap(domain, __ffs(pend1) + 64);
+ if (irq)
+ generic_handle_irq(irq);
+ else
+ spurious_interrupt();
LOCAL_HUB_L(PI_INT_PEND1);
}
@@ -326,11 +273,41 @@ void install_ipi(void)
void __init arch_init_irq(void)
{
+ struct irq_domain *domain;
+ struct fwnode_handle *fn;
+ int i;
+
mips_cpu_irq_init();
- ip27_hub_irq_init();
+
+ /*
+ * Some interrupts are reserved by hardware or by software convention.
+ * Mark these as reserved right away so they won't be used accidentally
+ * later.
+ */
+ for (i = 0; i <= BASE_PCI_IRQ; i++)
+ set_bit(i, hub_irq_map);
+
+ set_bit(IP_PEND0_6_63, hub_irq_map);
+
+ for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++)
+ set_bit(i, hub_irq_map);
+
+ fn = irq_domain_alloc_named_fwnode("HUB");
+ WARN_ON(fn == NULL);
+ if (!fn)
+ return;
+ domain = irq_domain_create_linear(fn, IP27_HUB_IRQ_COUNT,
+ &hub_domain_ops, NULL);
+ WARN_ON(domain == NULL);
+ if (!domain)
+ return;
+
+ irq_set_default_host(domain);
irq_set_percpu_devid(IP27_HUB_PEND0_IRQ);
- irq_set_chained_handler(IP27_HUB_PEND0_IRQ, ip27_do_irq_mask0);
+ irq_set_chained_handler_and_data(IP27_HUB_PEND0_IRQ, ip27_do_irq_mask0,
+ domain);
irq_set_percpu_devid(IP27_HUB_PEND1_IRQ);
- irq_set_chained_handler(IP27_HUB_PEND1_IRQ, ip27_do_irq_mask1);
+ irq_set_chained_handler_and_data(IP27_HUB_PEND1_IRQ, ip27_do_irq_mask1,
+ domain);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 18:32:12 +0000