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Commit c040aaeb authored by Suresh Siddha's avatar Suresh Siddha Committed by Ingo Molnar
Browse files

x86, ioapic: Consolidate gsi routing info into 'struct ioapic' 



Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Cc: daniel.blueman@gmail.com
Link: http://lkml.kernel.org/r/20110518233157.994002011@sbsiddha-MOBL3.sc.intel.com


Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d5371430

arch/x86/include/asm/io_apic.h

+1 −0
Original line number Diff line number Diff line
@@ -108,6 +108,7 @@ extern int nr_ioapics; 


extern int mpc_ioapic_id(int ioapic);

extern unsigned int mpc_ioapic_addr(int ioapic);

extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);



#define MP_MAX_IOAPIC_PIN 127

arch/x86/kernel/apic/io_apic.c

+25 −13
Original line number Diff line number Diff line
@@ -87,6 +87,8 @@ static struct ioapic { 
	struct IO_APIC_route_entry *saved_registers;

	/* I/O APIC config */

	struct mpc_ioapic mp_config;

	/* IO APIC gsi routing info */

	struct mp_ioapic_gsi  gsi_config;

} ioapics[MAX_IO_APICS];



#define mpc_ioapic_ver(id)		ioapics[id].mp_config.apicver
@@ -101,10 +103,12 @@ unsigned int mpc_ioapic_addr(int id) 
	return ioapics[id].mp_config.apicaddr;

}



int nr_ioapics;

struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int id)

{

	return &ioapics[id].gsi_config;

}



/* IO APIC gsi routing info */

struct mp_ioapic_gsi  mp_gsi_routing[MAX_IO_APICS];

int nr_ioapics;



/* The one past the highest gsi number used */

u32 gsi_top;
@@ -924,6 +928,7 @@ static int pin_2_irq(int idx, int apic, int pin) 
{

	int irq;

	int bus = mp_irqs[idx].srcbus;

	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(apic);



	/*

	 * Debugging check, we are in big trouble if this message pops up!
@@ -934,7 +939,7 @@ static int pin_2_irq(int idx, int apic, int pin) 
	if (test_bit(bus, mp_bus_not_pci)) {

		irq = mp_irqs[idx].srcbusirq;

	} else {

		u32 gsi = mp_gsi_routing[apic].gsi_base + pin;

		u32 gsi = gsi_cfg->gsi_base + pin;



		if (gsi >= NR_IRQS_LEGACY)

			irq = gsi;
@@ -3898,8 +3903,9 @@ int mp_find_ioapic(u32 gsi) 


	/* Find the IOAPIC that manages this GSI. */

	for (i = 0; i < nr_ioapics; i++) {

		if ((gsi >= mp_gsi_routing[i].gsi_base)

		    && (gsi <= mp_gsi_routing[i].gsi_end))

		struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(i);

		if ((gsi >= gsi_cfg->gsi_base)

		    && (gsi <= gsi_cfg->gsi_end))

			return i;

	}
@@ -3909,12 +3915,16 @@ int mp_find_ioapic(u32 gsi) 


int mp_find_ioapic_pin(int ioapic, u32 gsi)

{

	struct mp_ioapic_gsi *gsi_cfg;



	if (WARN_ON(ioapic == -1))

		return -1;

	if (WARN_ON(gsi > mp_gsi_routing[ioapic].gsi_end))



	gsi_cfg = mp_ioapic_gsi_routing(ioapic);

	if (WARN_ON(gsi > gsi_cfg->gsi_end))

		return -1;



	return gsi - mp_gsi_routing[ioapic].gsi_base;

	return gsi - gsi_cfg->gsi_base;

}



static __init int bad_ioapic(unsigned long address)
@@ -3936,6 +3946,7 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 
{

	int idx = 0;

	int entries;

	struct mp_ioapic_gsi *gsi_cfg;



	if (bad_ioapic(address))

		return;
@@ -3955,21 +3966,22 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 
	 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).

	 */

	entries = io_apic_get_redir_entries(idx);

	mp_gsi_routing[idx].gsi_base = gsi_base;

	mp_gsi_routing[idx].gsi_end = gsi_base + entries - 1;

	gsi_cfg = mp_ioapic_gsi_routing(idx);

	gsi_cfg->gsi_base = gsi_base;

	gsi_cfg->gsi_end = gsi_base + entries - 1;



	/*

	 * The number of IO-APIC IRQ registers (== #pins):

	 */

	ioapics[idx].nr_registers = entries;



	if (mp_gsi_routing[idx].gsi_end >= gsi_top)

		gsi_top = mp_gsi_routing[idx].gsi_end + 1;

	if (gsi_cfg->gsi_end >= gsi_top)

		gsi_top = gsi_cfg->gsi_end + 1;



	printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "

	       "GSI %d-%d\n", idx, mpc_ioapic_id(idx),

	       mpc_ioapic_ver(idx), mpc_ioapic_addr(idx),

	       mp_gsi_routing[idx].gsi_base, mp_gsi_routing[idx].gsi_end);

	       gsi_cfg->gsi_base, gsi_cfg->gsi_end);



	nr_ioapics++;

}

arch/x86/kernel/devicetree.c

+3 −1
Original line number Diff line number Diff line
@@ -369,6 +369,7 @@ static struct of_ioapic_type of_ioapic_type[] = 
static int ioapic_xlate(struct irq_domain *id, const u32 *intspec, u32 intsize,

			u32 *out_hwirq, u32 *out_type)

{

	struct mp_ioapic_gsi *gsi_cfg;

	struct io_apic_irq_attr attr;

	struct of_ioapic_type *it;

	u32 line, idx, type;
@@ -378,7 +379,8 @@ static int ioapic_xlate(struct irq_domain *id, const u32 *intspec, u32 intsize, 


	line = *intspec;

	idx = (u32) id->priv;

	*out_hwirq = line + mp_gsi_routing[idx].gsi_base;

	gsi_cfg = mp_ioapic_gsi_routing(idx);

	*out_hwirq = line + gsi_cfg->gsi_base;



	intspec++;

	type = *intspec;