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-rw-r--r--arch/mips/cavium-octeon/octeon-irq.c280
1 files changed, 137 insertions, 143 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index aba085b2c0d5..fadec885916a 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -18,11 +18,9 @@
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-ciu2-defs.h>
-static DEFINE_RAW_SPINLOCK(octeon_irq_ciu0_lock);
-static DEFINE_RAW_SPINLOCK(octeon_irq_ciu1_lock);
-
static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
+static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
static __read_mostly u8 octeon_irq_ciu_to_irq[8][64];
@@ -234,22 +232,31 @@ static void octeon_irq_ciu_enable(struct irq_data *data)
unsigned long *pen;
unsigned long flags;
union octeon_ciu_chip_data cd;
+ raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
cd.p = irq_data_get_irq_chip_data(data);
+ raw_spin_lock_irqsave(lock, flags);
if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
- set_bit(cd.s.bit, pen);
+ __set_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
} else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
- set_bit(cd.s.bit, pen);
+ __set_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
}
+ raw_spin_unlock_irqrestore(lock, flags);
}
static void octeon_irq_ciu_enable_local(struct irq_data *data)
@@ -257,22 +264,31 @@ static void octeon_irq_ciu_enable_local(struct irq_data *data)
unsigned long *pen;
unsigned long flags;
union octeon_ciu_chip_data cd;
+ raw_spinlock_t *lock = &__get_cpu_var(octeon_irq_ciu_spinlock);
cd.p = irq_data_get_irq_chip_data(data);
+ raw_spin_lock_irqsave(lock, flags);
if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
pen = &__get_cpu_var(octeon_irq_ciu0_en_mirror);
- set_bit(cd.s.bit, pen);
+ __set_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
} else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
pen = &__get_cpu_var(octeon_irq_ciu1_en_mirror);
- set_bit(cd.s.bit, pen);
+ __set_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
}
+ raw_spin_unlock_irqrestore(lock, flags);
}
static void octeon_irq_ciu_disable_local(struct irq_data *data)
@@ -280,22 +296,31 @@ static void octeon_irq_ciu_disable_local(struct irq_data *data)
unsigned long *pen;
unsigned long flags;
union octeon_ciu_chip_data cd;
+ raw_spinlock_t *lock = &__get_cpu_var(octeon_irq_ciu_spinlock);
cd.p = irq_data_get_irq_chip_data(data);
+ raw_spin_lock_irqsave(lock, flags);
if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
pen = &__get_cpu_var(octeon_irq_ciu0_en_mirror);
- clear_bit(cd.s.bit, pen);
+ __clear_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
} else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
pen = &__get_cpu_var(octeon_irq_ciu1_en_mirror);
- clear_bit(cd.s.bit, pen);
+ __clear_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
}
+ raw_spin_unlock_irqrestore(lock, flags);
}
static void octeon_irq_ciu_disable_all(struct irq_data *data)
@@ -304,29 +329,30 @@ static void octeon_irq_ciu_disable_all(struct irq_data *data)
unsigned long *pen;
int cpu;
union octeon_ciu_chip_data cd;
-
- wmb(); /* Make sure flag changes arrive before register updates. */
+ raw_spinlock_t *lock;
cd.p = irq_data_get_irq_chip_data(data);
- if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
+ for_each_online_cpu(cpu) {
+ int coreid = octeon_coreid_for_cpu(cpu);
+ lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+ if (cd.s.line == 0)
pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
- clear_bit(cd.s.bit, pen);
- cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
- }
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
- } else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
+ else
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
- clear_bit(cd.s.bit, pen);
+
+ raw_spin_lock_irqsave(lock, flags);
+ __clear_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
+ if (cd.s.line == 0)
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+ else
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
- }
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
+ raw_spin_unlock_irqrestore(lock, flags);
}
}
@@ -336,27 +362,30 @@ static void octeon_irq_ciu_enable_all(struct irq_data *data)
unsigned long *pen;
int cpu;
union octeon_ciu_chip_data cd;
+ raw_spinlock_t *lock;
cd.p = irq_data_get_irq_chip_data(data);
- if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
+ for_each_online_cpu(cpu) {
+ int coreid = octeon_coreid_for_cpu(cpu);
+ lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+ if (cd.s.line == 0)
pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
- set_bit(cd.s.bit, pen);
- cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
- }
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
- } else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
+ else
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
- set_bit(cd.s.bit, pen);
+
+ raw_spin_lock_irqsave(lock, flags);
+ __set_bit(cd.s.bit, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
+ if (cd.s.line == 0)
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+ else
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
- }
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
+ raw_spin_unlock_irqrestore(lock, flags);
}
}
@@ -459,8 +488,6 @@ static void octeon_irq_ciu_disable_all_v2(struct irq_data *data)
u64 mask;
union octeon_ciu_chip_data cd;
- wmb(); /* Make sure flag changes arrive before register updates. */
-
cd.p = irq_data_get_irq_chip_data(data);
mask = 1ull << (cd.s.bit);
@@ -618,6 +645,8 @@ static int octeon_irq_ciu_set_affinity(struct irq_data *data,
bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
unsigned long flags;
union octeon_ciu_chip_data cd;
+ unsigned long *pen;
+ raw_spinlock_t *lock;
cd.p = irq_data_get_irq_chip_data(data);
@@ -632,36 +661,36 @@ static int octeon_irq_ciu_set_affinity(struct irq_data *data,
if (!enable_one)
return 0;
- if (cd.s.line == 0) {
- raw_spin_lock_irqsave(&octeon_irq_ciu0_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
- unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
- if (cpumask_test_cpu(cpu, dest) && enable_one) {
- enable_one = false;
- set_bit(cd.s.bit, pen);
- } else {
- clear_bit(cd.s.bit, pen);
- }
- cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+ for_each_online_cpu(cpu) {
+ int coreid = octeon_coreid_for_cpu(cpu);
+
+ lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
+ raw_spin_lock_irqsave(lock, flags);
+
+ if (cd.s.line == 0)
+ pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
+ else
+ pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+
+ if (cpumask_test_cpu(cpu, dest) && enable_one) {
+ enable_one = 0;
+ __set_bit(cd.s.bit, pen);
+ } else {
+ __clear_bit(cd.s.bit, pen);
}
- raw_spin_unlock_irqrestore(&octeon_irq_ciu0_lock, flags);
- } else {
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
- for_each_online_cpu(cpu) {
- int coreid = octeon_coreid_for_cpu(cpu);
- unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before
+ * enabling the irq.
+ */
+ wmb();
- if (cpumask_test_cpu(cpu, dest) && enable_one) {
- enable_one = false;
- set_bit(cd.s.bit, pen);
- } else {
- clear_bit(cd.s.bit, pen);
- }
+ if (cd.s.line == 0)
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
+ else
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
- }
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
+
+ raw_spin_unlock_irqrestore(lock, flags);
}
return 0;
}
@@ -717,14 +746,6 @@ static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data,
#endif
/*
- * The v1 CIU code already masks things, so supply a dummy version to
- * the core chip code.
- */
-static void octeon_irq_dummy_mask(struct irq_data *data)
-{
-}
-
-/*
* Newer octeon chips have support for lockless CIU operation.
*/
static struct irq_chip octeon_irq_chip_ciu_v2 = {
@@ -745,7 +766,8 @@ static struct irq_chip octeon_irq_chip_ciu = {
.irq_enable = octeon_irq_ciu_enable,
.irq_disable = octeon_irq_ciu_disable_all,
.irq_ack = octeon_irq_ciu_ack,
- .irq_mask = octeon_irq_dummy_mask,
+ .irq_mask = octeon_irq_ciu_disable_local,
+ .irq_unmask = octeon_irq_ciu_enable,
#ifdef CONFIG_SMP
.irq_set_affinity = octeon_irq_ciu_set_affinity,
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
@@ -769,6 +791,8 @@ static struct irq_chip octeon_irq_chip_ciu_mbox = {
.name = "CIU-M",
.irq_enable = octeon_irq_ciu_enable_all,
.irq_disable = octeon_irq_ciu_disable_all,
+ .irq_ack = octeon_irq_ciu_disable_local,
+ .irq_eoi = octeon_irq_ciu_enable_local,
.irq_cpu_online = octeon_irq_ciu_enable_local,
.irq_cpu_offline = octeon_irq_ciu_disable_local,
@@ -793,7 +817,8 @@ static struct irq_chip octeon_irq_chip_ciu_gpio = {
.name = "CIU-GPIO",
.irq_enable = octeon_irq_ciu_enable_gpio,
.irq_disable = octeon_irq_ciu_disable_gpio,
- .irq_mask = octeon_irq_dummy_mask,
+ .irq_mask = octeon_irq_ciu_disable_local,
+ .irq_unmask = octeon_irq_ciu_enable,
.irq_ack = octeon_irq_ciu_gpio_ack,
.irq_set_type = octeon_irq_ciu_gpio_set_type,
#ifdef CONFIG_SMP
@@ -812,12 +837,18 @@ static void octeon_irq_ciu_wd_enable(struct irq_data *data)
unsigned long *pen;
int coreid = data->irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
int cpu = octeon_cpu_for_coreid(coreid);
+ raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
- raw_spin_lock_irqsave(&octeon_irq_ciu1_lock, flags);
+ raw_spin_lock_irqsave(lock, flags);
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
- set_bit(coreid, pen);
+ __set_bit(coreid, pen);
+ /*
+ * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling
+ * the irq.
+ */
+ wmb();
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
- raw_spin_unlock_irqrestore(&octeon_irq_ciu1_lock, flags);
+ raw_spin_unlock_irqrestore(lock, flags);
}
/*
@@ -846,7 +877,8 @@ static struct irq_chip octeon_irq_chip_ciu_wd = {
.name = "CIU-W",
.irq_enable = octeon_irq_ciu_wd_enable,
.irq_disable = octeon_irq_ciu_disable_all,
- .irq_mask = octeon_irq_dummy_mask,
+ .irq_mask = octeon_irq_ciu_disable_local,
+ .irq_unmask = octeon_irq_ciu_enable_local,
};
static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit)
@@ -1027,27 +1059,7 @@ static struct irq_domain_ops octeon_irq_domain_gpio_ops = {
.xlate = octeon_irq_gpio_xlat,
};
-static void octeon_irq_ip2_v1(void)
-{
- const unsigned long core_id = cvmx_get_core_num();
- u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
-
- ciu_sum &= __get_cpu_var(octeon_irq_ciu0_en_mirror);
- clear_c0_status(STATUSF_IP2);
- if (likely(ciu_sum)) {
- int bit = fls64(ciu_sum) - 1;
- int irq = octeon_irq_ciu_to_irq[0][bit];
- if (likely(irq))
- do_IRQ(irq);
- else
- spurious_interrupt();
- } else {
- spurious_interrupt();
- }
- set_c0_status(STATUSF_IP2);
-}
-
-static void octeon_irq_ip2_v2(void)
+static void octeon_irq_ip2_ciu(void)
{
const unsigned long core_id = cvmx_get_core_num();
u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
@@ -1064,26 +1076,8 @@ static void octeon_irq_ip2_v2(void)
spurious_interrupt();
}
}
-static void octeon_irq_ip3_v1(void)
-{
- u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
- ciu_sum &= __get_cpu_var(octeon_irq_ciu1_en_mirror);
- clear_c0_status(STATUSF_IP3);
- if (likely(ciu_sum)) {
- int bit = fls64(ciu_sum) - 1;
- int irq = octeon_irq_ciu_to_irq[1][bit];
- if (likely(irq))
- do_IRQ(irq);
- else
- spurious_interrupt();
- } else {
- spurious_interrupt();
- }
- set_c0_status(STATUSF_IP3);
-}
-
-static void octeon_irq_ip3_v2(void)
+static void octeon_irq_ip3_ciu(void)
{
u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
@@ -1134,6 +1128,12 @@ static void __cpuinit octeon_irq_percpu_enable(void)
static void __cpuinit octeon_irq_init_ciu_percpu(void)
{
int coreid = cvmx_get_core_num();
+
+
+ __get_cpu_var(octeon_irq_ciu0_en_mirror) = 0;
+ __get_cpu_var(octeon_irq_ciu1_en_mirror) = 0;
+ wmb();
+ raw_spin_lock_init(&__get_cpu_var(octeon_irq_ciu_spinlock));
/*
* Disable All CIU Interrupts. The ones we need will be
* enabled later. Read the SUM register so we know the write
@@ -1170,10 +1170,6 @@ static void octeon_irq_init_ciu2_percpu(void)
static void __cpuinit octeon_irq_setup_secondary_ciu(void)
{
-
- __get_cpu_var(octeon_irq_ciu0_en_mirror) = 0;
- __get_cpu_var(octeon_irq_ciu1_en_mirror) = 0;
-
octeon_irq_init_ciu_percpu();
octeon_irq_percpu_enable();
@@ -1208,19 +1204,17 @@ static void __init octeon_irq_init_ciu(void)
octeon_irq_init_ciu_percpu();
octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu;
+ octeon_irq_ip2 = octeon_irq_ip2_ciu;
+ octeon_irq_ip3 = octeon_irq_ip3_ciu;
if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) ||
OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
- octeon_irq_ip2 = octeon_irq_ip2_v2;
- octeon_irq_ip3 = octeon_irq_ip3_v2;
chip = &octeon_irq_chip_ciu_v2;
chip_mbox = &octeon_irq_chip_ciu_mbox_v2;
chip_wd = &octeon_irq_chip_ciu_wd_v2;
octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2;
} else {
- octeon_irq_ip2 = octeon_irq_ip2_v1;
- octeon_irq_ip3 = octeon_irq_ip3_v1;
chip = &octeon_irq_chip_ciu;
chip_mbox = &octeon_irq_chip_ciu_mbox;
chip_wd = &octeon_irq_chip_ciu_wd;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 04:37:10 +0000