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powerpc: Convert irq_domain_add_legacy_isa use to irq_domain_add_legacy

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irq_domain_add_legacy_isa is a pain. It only exists for the benefit of
two PPC-specific drivers, and creates an ugly dependency between asm/irq.h
and linux/irqdomain.h

Instead, let's convert these two drivers to irq_domain_add_legacy(),
stop using NUM_ISA_INTERRUPTS by directly setting NR_IRQS_LEGACY.

The dependency cannot be broken yet as there is a lot of PPC-related
code that depends on it, but that's the first step towards it.

A followup patch will remove irq_domain_add_legacy_isa.

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2018-09-13 10:42:25 +01:00
parent 5951be4c9c
commit 7c576f4d3c
6 changed files with 10 additions and 8 deletions
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4
arch/powerpc/include/asm/irq.h
View file

@ -23,8 +23,8 @@ extern atomic_t ppc_n_lost_interrupts;
/* Total number of virq in the platform */
#define NR_IRQS CONFIG_NR_IRQS
/* Same thing, used by the generic IRQ code */
#define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS
/* Number of irqs reserved for a legacy isa controller */
#define NR_IRQS_LEGACY 16
extern irq_hw_number_t virq_to_hw(unsigned int virq);

4
arch/powerpc/platforms/ps3/interrupt.c
View file

@ -46,7 +46,7 @@
* implementation equates HV plug value to Linux virq value, constrains each
* interrupt to have a system wide unique plug number, and limits the range
* of the plug values to map into the first dword of the bitmaps. This
* gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
* gives a usable range of plug values of {NR_IRQS_LEGACY..63}. Note
* that there is no constraint on how many in this set an individual thread
* can acquire.
*
@ -722,7 +722,7 @@ static unsigned int ps3_get_irq(void)
}
#if defined(DEBUG)
if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) {
if (unlikely(plug < NR_IRQS_LEGACY || plug > PS3_PLUG_MAX)) {
dump_bmp(&per_cpu(ps3_private, 0));
dump_bmp(&per_cpu(ps3_private, 1));
BUG();

3
arch/powerpc/sysdev/i8259.c
View file

@ -260,7 +260,8 @@ void i8259_init(struct device_node *node, unsigned long intack_addr)
raw_spin_unlock_irqrestore(&i8259_lock, flags);
/* create a legacy host */
i8259_host = irq_domain_add_legacy_isa(node, &i8259_host_ops, NULL);
i8259_host = irq_domain_add_legacy(node, NR_IRQS_LEGACY, 0, 0,
&i8259_host_ops, NULL);
if (i8259_host == NULL) {
printk(KERN_ERR "i8259: failed to allocate irq host !\n");
return;

2
arch/powerpc/sysdev/mpic.c
View file

@ -602,7 +602,7 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
/* Find an mpic associated with a given linux interrupt */
static struct mpic *mpic_find(unsigned int irq)
{
if (irq < NUM_ISA_INTERRUPTS)
if (irq < NR_IRQS_LEGACY)
return NULL;
return irq_get_chip_data(irq);

3
arch/powerpc/sysdev/tsi108_pci.c
View file

@ -404,7 +404,8 @@ void __init tsi108_pci_int_init(struct device_node *node)
{
DBG("Tsi108_pci_int_init: initializing PCI interrupts\n");
pci_irq_host = irq_domain_add_legacy_isa(node, &pci_irq_domain_ops, NULL);
pci_irq_host = irq_domain_add_legacy(node, NR_IRQS_LEGACY, 0, 0,
&pci_irq_domain_ops, NULL);
if (pci_irq_host == NULL) {
printk(KERN_ERR "pci_irq_host: failed to allocate irq domain!\n");
return;

2
arch/powerpc/sysdev/xics/xics-common.c
View file

@ -201,7 +201,7 @@ void xics_migrate_irqs_away(void)
struct ics *ics;
/* We can't set affinity on ISA interrupts */
if (virq < NUM_ISA_INTERRUPTS)
if (virq < NR_IRQS_LEGACY)
continue;
/* We only need to migrate enabled IRQS */
if (!desc->action)