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Commit 6d50bc26 authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: use 28 bits irq NR for pci msi/msix and ht 



also print out irq no in /proc/interrups and /proc/stat in hex, so could
tell bus/dev/func.

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e420dfb4

arch/x86/kernel/io_apic_64.c

+50 −14
Original line number Diff line number Diff line
@@ -2520,17 +2520,21 @@ device_initcall(ioapic_init_sysfs); 
/*

 * Dynamic irq allocate and deallocation

 */

int create_irq(void)

unsigned int create_irq_nr(unsigned int irq_want)

{

	/* Allocate an unused irq */

	int irq;

	int new;

	unsigned int irq;

	unsigned int new;

	unsigned long flags;

	struct irq_cfg *cfg_new;



	irq = -ENOSPC;

#ifndef CONFIG_HAVE_SPARSE_IRQ

	irq_want = nr_irqs - 1;

#endif



	irq = 0;

	spin_lock_irqsave(&vector_lock, flags);

	for (new = (nr_irqs - 1); new >= 0; new--) {

	for (new = irq_want; new > 0; new--) {

		if (platform_legacy_irq(new))

			continue;

		cfg_new = irq_cfg(new);
@@ -2545,12 +2549,24 @@ int create_irq(void) 
	}

	spin_unlock_irqrestore(&vector_lock, flags);



	if (irq >= 0) {

	if (irq > 0) {

		dynamic_irq_init(irq);

	}

	return irq;

}



int create_irq(void)

{

	int irq;



	irq = create_irq_nr(nr_irqs - 1);



	if (irq == 0)

		irq = -1;



	return irq;

}



void destroy_irq(unsigned int irq)

{

	unsigned long flags;
@@ -2803,13 +2819,29 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc, int irq) 
	return 0;

}



int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)

static unsigned int build_irq_for_pci_dev(struct pci_dev *dev)

{

	int irq, ret;

	unsigned int irq;



	irq = dev->bus->number;

	irq <<= 8;

	irq |= dev->devfn;

	irq <<= 12;



	irq = create_irq();

	if (irq < 0)

	return irq;

}



int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)

{

	unsigned int irq;

	int ret;

	unsigned int irq_want;



	irq_want = build_irq_for_pci_dev(dev) + 0x100;



	irq = create_irq_nr(irq_want);

	if (irq == 0)

		return -1;



#ifdef CONFIG_INTR_REMAP

	if (!intr_remapping_enabled)
@@ -2836,18 +2868,22 @@ error: 


int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)

{

	int irq, ret, sub_handle;

	unsigned int irq;

	int ret, sub_handle;

	struct msi_desc *desc;

	unsigned int irq_want;



#ifdef CONFIG_INTR_REMAP

	struct intel_iommu *iommu = 0;

	int index = 0;

#endif



	irq_want = build_irq_for_pci_dev(dev) + 0x100;

	sub_handle = 0;

	list_for_each_entry(desc, &dev->msi_list, list) {

		irq = create_irq();

		if (irq < 0)

			return irq;

		irq = create_irq_nr(irq_want--);

		if (irq == 0)

			return -1;

#ifdef CONFIG_INTR_REMAP

		if (!intr_remapping_enabled)

			goto no_ir;

arch/x86/kernel/irq_64.c

+1 −1
Original line number Diff line number Diff line
@@ -112,7 +112,7 @@ int show_interrupts(struct seq_file *p, void *v) 
		action = desc->action;

		if (!action && !any_count)

			goto skip;

		seq_printf(p, "%3d: ",i);

		seq_printf(p, "%#x: ",i);

#ifndef CONFIG_SMP

		seq_printf(p, "%10u ", kstat_irqs(i));

#else

drivers/pci/htirq.c

+20 −2
Original line number Diff line number Diff line
@@ -82,6 +82,18 @@ void unmask_ht_irq(unsigned int irq) 
	write_ht_irq_msg(irq, &msg);

}



static unsigned int build_irq_for_pci_dev(struct pci_dev *dev)

{

	unsigned int irq;



	irq = dev->bus->number;

	irq <<= 8;

	irq |= dev->devfn;

	irq <<= 12;



	return irq;

}



/**

 * __ht_create_irq - create an irq and attach it to a device.

 * @dev: The hypertransport device to find the irq capability on.
@@ -97,7 +109,8 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update) 
	u32 data;

	int max_irq;

	int pos;

	int irq;

	unsigned int irq;

	unsigned int irq_want;



	pos = pci_find_ht_capability(dev, HT_CAPTYPE_IRQ);

	if (!pos)
@@ -125,8 +138,13 @@ int __ht_create_irq(struct pci_dev *dev, int idx, ht_irq_update_t *update) 
	cfg->msg.address_lo = 0xffffffff;

	cfg->msg.address_hi = 0xffffffff;



	irq_want= build_irq_for_pci_dev(dev);

#ifdef CONFIG_HAVE_SPARSE_IRQ

	irq = create_irq_nr(irq_want + idx);

#else

	irq = create_irq();

	if (irq < 0) {

#endif

	if (irq == 0) {

		kfree(cfg);

		return -EBUSY;

	}

fs/proc/proc_misc.c

+1 −1
Original line number Diff line number Diff line
@@ -589,7 +589,7 @@ static int show_stat(struct seq_file *p, void *v) 
		}



#ifdef CONFIG_HAVE_SPARSE_IRQ

		seq_printf(p, " %u:%u", j, per_irq_sum);

		seq_printf(p, " %#x:%u", j, per_irq_sum);

#else

		seq_printf(p, " %u", per_irq_sum);

#endif

include/linux/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -399,6 +399,7 @@ extern void set_irq_noprobe(unsigned int irq); 
extern void set_irq_probe(unsigned int irq);



/* Handle dynamic irq creation and destruction */

extern unsigned int create_irq_nr(unsigned int irq_want);

extern int create_irq(void);

extern void destroy_irq(unsigned int irq);