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MIPS: Octeon: Do proper acknowledgment of CIU timer interrupts.

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Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: netdev@vger.kernel.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/967/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2010-02-15 12:13:18 -08:00 committed by Ralf Baechle
parent f8c2648666
commit 86568dc41e
1 changed files with 63 additions and 4 deletions
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67
arch/mips/cavium-octeon/octeon-irq.c
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@ -51,9 +51,6 @@ static void octeon_irq_core_eoi(unsigned int irq)
*/
if (desc->status & IRQ_DISABLED)
return;
/* There is a race here. We should fix it. */
/*
* We don't need to disable IRQs to make these atomic since
* they are already disabled earlier in the low level
@ -201,6 +198,29 @@ static void octeon_irq_ciu0_ack_v2(unsigned int irq)
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
}
/*
* CIU timer type interrupts must be acknoleged by writing a '1' bit
* to their sum0 bit.
*/
static void octeon_irq_ciu0_timer_ack(unsigned int irq)
{
int index = cvmx_get_core_num() * 2;
uint64_t mask = 1ull << (irq - OCTEON_IRQ_WORKQ0);
cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask);
}
static void octeon_irq_ciu0_timer_ack_v1(unsigned int irq)
{
octeon_irq_ciu0_timer_ack(irq);
octeon_irq_ciu0_ack(irq);
}
static void octeon_irq_ciu0_timer_ack_v2(unsigned int irq)
{
octeon_irq_ciu0_timer_ack(irq);
octeon_irq_ciu0_ack_v2(irq);
}
/*
* Enable the irq on the current core for chips that have the EN*_W1{S,C}
* registers.
@ -304,6 +324,28 @@ static struct irq_chip octeon_irq_chip_ciu0 = {
#endif
};
static struct irq_chip octeon_irq_chip_ciu0_timer_v2 = {
.name = "CIU0-T",
.enable = octeon_irq_ciu0_enable_v2,
.disable = octeon_irq_ciu0_disable_all_v2,
.ack = octeon_irq_ciu0_timer_ack_v2,
.eoi = octeon_irq_ciu0_eoi_v2,
#ifdef CONFIG_SMP
.set_affinity = octeon_irq_ciu0_set_affinity_v2,
#endif
};
static struct irq_chip octeon_irq_chip_ciu0_timer = {
.name = "CIU0-T",
.enable = octeon_irq_ciu0_enable,
.disable = octeon_irq_ciu0_disable,
.ack = octeon_irq_ciu0_timer_ack_v1,
.eoi = octeon_irq_ciu0_eoi,
#ifdef CONFIG_SMP
.set_affinity = octeon_irq_ciu0_set_affinity,
#endif
};
static void octeon_irq_ciu1_ack(unsigned int irq)
{
@ -587,6 +629,7 @@ void __init arch_init_irq(void)
{
int irq;
struct irq_chip *chip0;
struct irq_chip *chip0_timer;
struct irq_chip *chip1;
#ifdef CONFIG_SMP
@ -602,9 +645,11 @@ void __init arch_init_irq(void)
OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X)) {
chip0 = &octeon_irq_chip_ciu0_v2;
chip0_timer = &octeon_irq_chip_ciu0_timer_v2;
chip1 = &octeon_irq_chip_ciu1_v2;
} else {
chip0 = &octeon_irq_chip_ciu0;
chip0_timer = &octeon_irq_chip_ciu0_timer;
chip1 = &octeon_irq_chip_ciu1;
}
@ -618,7 +663,21 @@ void __init arch_init_irq(void)
/* 24 - 87 CIU_INT_SUM0 */
for (irq = OCTEON_IRQ_WORKQ0; irq <= OCTEON_IRQ_BOOTDMA; irq++) {
set_irq_chip_and_handler(irq, chip0, handle_percpu_irq);
switch (irq) {
case OCTEON_IRQ_GMX_DRP0:
case OCTEON_IRQ_GMX_DRP1:
case OCTEON_IRQ_IPD_DRP:
case OCTEON_IRQ_KEY_ZERO:
case OCTEON_IRQ_TIMER0:
case OCTEON_IRQ_TIMER1:
case OCTEON_IRQ_TIMER2:
case OCTEON_IRQ_TIMER3:
set_irq_chip_and_handler(irq, chip0_timer, handle_percpu_irq);
break;
default:
set_irq_chip_and_handler(irq, chip0, handle_percpu_irq);
break;
}
}
/* 88 - 151 CIU_INT_SUM1 */