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Commit 735e60f4 authored by Mark Maule's avatar Mark Maule Committed by Tony Luck
Browse files

[IA64-SGI] abstract force_interrupt() mechanism 



Altix patch to abstract the force_interrupt() mechanism away from the
pcibr provider.

Signed-off-by: default avatarMark Maule <maule@sgi.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 89963d16

arch/ia64/sn/kernel/irq.c

+28 −22
Original line number Diff line number Diff line
@@ -317,6 +317,16 @@ void sn_irq_unfixup(struct pci_dev *pci_dev) 
	pci_dev_put(pci_dev);

}



static inline void

sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)

{

	struct sn_pcibus_provider *pci_provider;



	pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];

	if (pci_provider && pci_provider->force_interrupt)

		(*pci_provider->force_interrupt)(sn_irq_info);

}



static void force_interrupt(int irq)

{

	struct sn_irq_info *sn_irq_info;
@@ -325,11 +335,9 @@ static void force_interrupt(int irq) 
		return;



	rcu_read_lock();

	list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list) {

		if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) &&

		    (sn_irq_info->irq_bridge != NULL))

			pcibr_force_interrupt(sn_irq_info);

	}

	list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list)

		sn_call_force_intr_provider(sn_irq_info);



	rcu_read_unlock();

}
@@ -351,6 +359,14 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info) 
	struct pcidev_info *pcidev_info;

	struct pcibus_info *pcibus_info;



	/*

	 * Bridge types attached to TIO (anything but PIC) do not need this WAR

	 * since they do not target Shub II interrupt registers.  If that

	 * ever changes, this check needs to accomodate.

	 */

	if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_PIC)

		return;



	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;

	if (!pcidev_info)

		return;
@@ -377,16 +393,12 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info) 
		break;

	}

	if (!test_bit(irr_bit, &irr_reg)) {

		if (!test_bit(irq, pda->sn_soft_irr)) {

		if (!test_bit(irq, pda->sn_in_service_ivecs)) {

			regval &= 0xff;

			if (sn_irq_info->irq_int_bit & regval &

			    sn_irq_info->irq_last_intr) {

					regval &=

					    ~(sn_irq_info->

					      irq_int_bit & regval);

					pcibr_force_interrupt(sn_irq_info);

				}

				regval &= ~(sn_irq_info->irq_int_bit & regval);

				sn_call_force_intr_provider(sn_irq_info);

			}

		}

	}
@@ -404,12 +416,6 @@ void sn_lb_int_war_check(void) 
	rcu_read_lock();

	for (i = pda->sn_first_irq; i <= pda->sn_last_irq; i++) {

		list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[i], list) {

			/*

			 * Only call for PCI bridges that are fully

			 * initialized.

			 */

			if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) &&

			    (sn_irq_info->irq_bridge != NULL))

			sn_check_intr(i, sn_irq_info);

		}

	}

arch/ia64/sn/pci/pcibr/pcibr_provider.c

+4 −0
Original line number Diff line number Diff line
@@ -178,6 +178,9 @@ void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info) 
	struct pcibus_info *pcibus_info;

	int bit = sn_irq_info->irq_int_bit;



	if (! sn_irq_info->irq_bridge)

		return;



	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;

	if (pcidev_info) {

		pcibus_info =
@@ -222,6 +225,7 @@ struct sn_pcibus_provider pcibr_provider = { 
	.dma_map_consistent = pcibr_dma_map_consistent,

	.dma_unmap = pcibr_dma_unmap,

	.bus_fixup = pcibr_bus_fixup,

	.force_interrupt = pcibr_force_interrupt

};



int

arch/ia64/sn/pci/tioca_provider.c

+1 −0
Original line number Diff line number Diff line
@@ -657,6 +657,7 @@ static struct sn_pcibus_provider tioca_pci_interfaces = { 
	.dma_map_consistent = tioca_dma_map,

	.dma_unmap = tioca_dma_unmap,

	.bus_fixup = tioca_bus_fixup,

	.force_interrupt = NULL

};



/**

include/asm-ia64/sn/pcibus_provider_defs.h

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ struct sn_pcibus_provider { 
	dma_addr_t	(*dma_map_consistent)(struct pci_dev *, unsigned long, size_t);

	void		(*dma_unmap)(struct pci_dev *, dma_addr_t, int);

	void *		(*bus_fixup)(struct pcibus_bussoft *, struct pci_controller *);

 	void		(*force_interrupt)(struct sn_irq_info *);

};



extern struct sn_pcibus_provider *sn_pci_provider[];

include/asm-ia64/sn/pda.h

+0 −1
Original line number Diff line number Diff line
@@ -39,7 +39,6 @@ typedef struct pda_s { 
	unsigned long pio_write_status_val;

	volatile unsigned long *pio_shub_war_cam_addr;



	unsigned long	sn_soft_irr[4];

	unsigned long	sn_in_service_ivecs[4];

	int		sn_lb_int_war_ticks;

	int		sn_last_irq;