net: dsa: microchip: use common irq routines for girq and pirq

The global port interrupt routines and individual ports interrupt
routines has similar implementation except the mask & status register
and number of nested irqs in them.  The mask & status register and
pointer to ksz_device is added to ksz_irq and uses the ksz_irq as
irq_chip_data.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 605ce3ffbeffac9669037329e15527e0454eb64e..d612181b3226e36f52a2b80414f1b5e23bf42b18 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1768,97 +1768,97 @@ static int ksz_mdio_register(struct ksz_device *dev)
        return ret;
 }
 
-static void ksz_girq_mask(struct irq_data *d)
+static void ksz_irq_mask(struct irq_data *d)
 {
-       struct ksz_device *dev = irq_data_get_irq_chip_data(d);
-       unsigned int n = d->hwirq;
+       struct ksz_irq *kirq = irq_data_get_irq_chip_data(d);
 
-       dev->girq.masked |= (1 << n);
+       kirq->masked |= BIT(d->hwirq);
 }
 
-static void ksz_girq_unmask(struct irq_data *d)
+static void ksz_irq_unmask(struct irq_data *d)
 {
-       struct ksz_device *dev = irq_data_get_irq_chip_data(d);
-       unsigned int n = d->hwirq;
+       struct ksz_irq *kirq = irq_data_get_irq_chip_data(d);
 
-       dev->girq.masked &= ~(1 << n);
+       kirq->masked &= ~BIT(d->hwirq);
 }
 
-static void ksz_girq_bus_lock(struct irq_data *d)
+static void ksz_irq_bus_lock(struct irq_data *d)
 {
-       struct ksz_device *dev = irq_data_get_irq_chip_data(d);
+       struct ksz_irq *kirq  = irq_data_get_irq_chip_data(d);
 
-       mutex_lock(&dev->lock_irq);
+       mutex_lock(&kirq->dev->lock_irq);
 }
 
-static void ksz_girq_bus_sync_unlock(struct irq_data *d)
+static void ksz_irq_bus_sync_unlock(struct irq_data *d)
 {
-       struct ksz_device *dev = irq_data_get_irq_chip_data(d);
+       struct ksz_irq *kirq  = irq_data_get_irq_chip_data(d);
+       struct ksz_device *dev = kirq->dev;
        int ret;
 
-       ret = ksz_write32(dev, REG_SW_PORT_INT_MASK__4, dev->girq.masked);
+       ret = ksz_write32(dev, kirq->reg_mask, kirq->masked);
        if (ret)
                dev_err(dev->dev, "failed to change IRQ mask\n");
 
        mutex_unlock(&dev->lock_irq);
 }
 
-static const struct irq_chip ksz_girq_chip = {
-       .name                   = "ksz-global",
-       .irq_mask               = ksz_girq_mask,
-       .irq_unmask             = ksz_girq_unmask,
-       .irq_bus_lock           = ksz_girq_bus_lock,
-       .irq_bus_sync_unlock    = ksz_girq_bus_sync_unlock,
+static const struct irq_chip ksz_irq_chip = {
+       .name                   = "ksz-irq",
+       .irq_mask               = ksz_irq_mask,
+       .irq_unmask             = ksz_irq_unmask,
+       .irq_bus_lock           = ksz_irq_bus_lock,
+       .irq_bus_sync_unlock    = ksz_irq_bus_sync_unlock,
 };
 
-static int ksz_girq_domain_map(struct irq_domain *d,
-                              unsigned int irq, irq_hw_number_t hwirq)
+static int ksz_irq_domain_map(struct irq_domain *d,
+                             unsigned int irq, irq_hw_number_t hwirq)
 {
-       struct ksz_device *dev = d->host_data;
-
        irq_set_chip_data(irq, d->host_data);
-       irq_set_chip_and_handler(irq, &dev->girq.chip, handle_level_irq);
+       irq_set_chip_and_handler(irq, &ksz_irq_chip, handle_level_irq);
        irq_set_noprobe(irq);
 
        return 0;
 }
 
-static const struct irq_domain_ops ksz_girq_domain_ops = {
-       .map    = ksz_girq_domain_map,
+static const struct irq_domain_ops ksz_irq_domain_ops = {
+       .map    = ksz_irq_domain_map,
        .xlate  = irq_domain_xlate_twocell,
 };
 
-static void ksz_girq_free(struct ksz_device *dev)
+static void ksz_irq_free(struct ksz_irq *kirq)
 {
        int irq, virq;
 
-       free_irq(dev->irq, dev);
+       free_irq(kirq->irq_num, kirq);
 
-       for (irq = 0; irq < dev->girq.nirqs; irq++) {
-               virq = irq_find_mapping(dev->girq.domain, irq);
+       for (irq = 0; irq < kirq->nirqs; irq++) {
+               virq = irq_find_mapping(kirq->domain, irq);
                irq_dispose_mapping(virq);
        }
 
-       irq_domain_remove(dev->girq.domain);
+       irq_domain_remove(kirq->domain);
 }
 
-static irqreturn_t ksz_girq_thread_fn(int irq, void *dev_id)
+static irqreturn_t ksz_irq_thread_fn(int irq, void *dev_id)
 {
-       struct ksz_device *dev = dev_id;
+       struct ksz_irq *kirq = dev_id;
        unsigned int nhandled = 0;
+       struct ksz_device *dev;
        unsigned int sub_irq;
-       unsigned int n;
-       u32 data;
+       u8 data;
        int ret;
+       u8 n;
 
-       /* Read global interrupt status register */
-       ret = ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data);
+       dev = kirq->dev;
+
+       /* Read interrupt status register */
+       ret = ksz_read8(dev, kirq->reg_status, &data);
        if (ret)
                goto out;
 
-       for (n = 0; n < dev->girq.nirqs; ++n) {
-               if (data & (1 << n)) {
-                       sub_irq = irq_find_mapping(dev->girq.domain, n);
+       for (n = 0; n < kirq->nirqs; ++n) {
+               if (data & BIT(n)) {
+                       sub_irq = irq_find_mapping(kirq->domain, n);
                        handle_nested_irq(sub_irq);
                        ++nhandled;
                }
@@ -1867,177 +1867,63 @@ out:
        return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE);
 }
 
-static int ksz_girq_setup(struct ksz_device *dev)
+static int ksz_irq_common_setup(struct ksz_device *dev, struct ksz_irq *kirq)
 {
-       int ret, irq;
+       int ret, n;
 
-       dev->girq.nirqs = dev->info->port_cnt;
-       dev->girq.domain = irq_domain_add_simple(NULL, dev->girq.nirqs, 0,
-                                                &ksz_girq_domain_ops, dev);
-       if (!dev->girq.domain)
-               return -ENOMEM;
+       kirq->dev = dev;
+       kirq->masked = ~0;
 
-       for (irq = 0; irq < dev->girq.nirqs; irq++)
-               irq_create_mapping(dev->girq.domain, irq);
+       kirq->domain = irq_domain_add_simple(dev->dev->of_node, kirq->nirqs, 0,
+                                            &ksz_irq_domain_ops, kirq);
+       if (!kirq->domain)
+               return -ENOMEM;
 
-       dev->girq.chip = ksz_girq_chip;
-       dev->girq.masked = ~0;
+       for (n = 0; n < kirq->nirqs; n++)
+               irq_create_mapping(kirq->domain, n);
 
-       ret = request_threaded_irq(dev->irq, NULL, ksz_girq_thread_fn,
+       ret = request_threaded_irq(kirq->irq_num, NULL, ksz_irq_thread_fn,
                                   IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
-                                  dev_name(dev->dev), dev);
+                                  kirq->name, kirq);
        if (ret)
                goto out;
 
        return 0;
 
 out:
-       ksz_girq_free(dev);
+       ksz_irq_free(kirq);
 
        return ret;
 }
 
-static void ksz_pirq_mask(struct irq_data *d)
-{
-       struct ksz_port *port = irq_data_get_irq_chip_data(d);
-       unsigned int n = d->hwirq;
-
-       port->pirq.masked |= (1 << n);
-}
-
-static void ksz_pirq_unmask(struct irq_data *d)
-{
-       struct ksz_port *port = irq_data_get_irq_chip_data(d);
-       unsigned int n = d->hwirq;
-
-       port->pirq.masked &= ~(1 << n);
-}
-
-static void ksz_pirq_bus_lock(struct irq_data *d)
-{
-       struct ksz_port *port = irq_data_get_irq_chip_data(d);
-       struct ksz_device *dev = port->ksz_dev;
-
-       mutex_lock(&dev->lock_irq);
-}
-
-static void ksz_pirq_bus_sync_unlock(struct irq_data *d)
-{
-       struct ksz_port *port = irq_data_get_irq_chip_data(d);
-       struct ksz_device *dev = port->ksz_dev;
-
-       ksz_pwrite8(dev, port->num, REG_PORT_INT_MASK, port->pirq.masked);
-       mutex_unlock(&dev->lock_irq);
-}
-
-static const struct irq_chip ksz_pirq_chip = {
-       .name                   = "ksz-port",
-       .irq_mask               = ksz_pirq_mask,
-       .irq_unmask             = ksz_pirq_unmask,
-       .irq_bus_lock           = ksz_pirq_bus_lock,
-       .irq_bus_sync_unlock    = ksz_pirq_bus_sync_unlock,
-};
-
-static int ksz_pirq_domain_map(struct irq_domain *d, unsigned int irq,
-                              irq_hw_number_t hwirq)
-{
-       struct ksz_port *port = d->host_data;
-
-       irq_set_chip_data(irq, d->host_data);
-       irq_set_chip_and_handler(irq, &port->pirq.chip, handle_level_irq);
-       irq_set_noprobe(irq);
-
-       return 0;
-}
-
-static const struct irq_domain_ops ksz_pirq_domain_ops = {
-       .map    = ksz_pirq_domain_map,
-       .xlate  = irq_domain_xlate_twocell,
-};
-
-static void ksz_pirq_free(struct ksz_device *dev, u8 p)
-{
-       struct ksz_port *port = &dev->ports[p];
-       int irq, virq;
-       int irq_num;
-
-       irq_num = irq_find_mapping(dev->girq.domain, p);
-       if (irq_num < 0)
-               return;
-
-       free_irq(irq_num, port);
-
-       for (irq = 0; irq < port->pirq.nirqs; irq++) {
-               virq = irq_find_mapping(port->pirq.domain, irq);
-               irq_dispose_mapping(virq);
-       }
-
-       irq_domain_remove(port->pirq.domain);
-}
-
-static irqreturn_t ksz_pirq_thread_fn(int irq, void *dev_id)
+static int ksz_girq_setup(struct ksz_device *dev)
 {
-       struct ksz_port *port = dev_id;
-       unsigned int nhandled = 0;
-       struct ksz_device *dev;
-       unsigned int sub_irq;
-       unsigned int n;
-       u8 data;
-
-       dev = port->ksz_dev;
+       struct ksz_irq *girq = &dev->girq;
 
-       /* Read port interrupt status register */
-       ksz_pread8(dev, port->num, REG_PORT_INT_STATUS, &data);
+       girq->nirqs = dev->info->port_cnt;
+       girq->reg_mask = REG_SW_PORT_INT_MASK__1;
+       girq->reg_status = REG_SW_PORT_INT_STATUS__1;
+       snprintf(girq->name, sizeof(girq->name), "global_port_irq");
 
-       for (n = 0; n < port->pirq.nirqs; ++n) {
-               if (data & (1 << n)) {
-                       sub_irq = irq_find_mapping(port->pirq.domain, n);
-                       handle_nested_irq(sub_irq);
-                       ++nhandled;
-               }
-       }
+       girq->irq_num = dev->irq;
 
-       return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE);
+       return ksz_irq_common_setup(dev, girq);
 }
 
 static int ksz_pirq_setup(struct ksz_device *dev, u8 p)
 {
-       struct ksz_port *port = &dev->ports[p];
-       int ret, irq;
-       int irq_num;
-
-       port->pirq.nirqs = dev->info->port_nirqs;
-       port->pirq.domain = irq_domain_add_simple(dev->dev->of_node,
-                                                 port->pirq.nirqs, 0,
-                                                 &ksz_pirq_domain_ops,
-                                                 port);
-       if (!port->pirq.domain)
-               return -ENOMEM;
-
-       for (irq = 0; irq < port->pirq.nirqs; irq++)
-               irq_create_mapping(port->pirq.domain, irq);
-
-       port->pirq.chip = ksz_pirq_chip;
-       port->pirq.masked = ~0;
+       struct ksz_irq *pirq = &dev->ports[p].pirq;
 
-       irq_num = irq_find_mapping(dev->girq.domain, p);
-       if (irq_num < 0)
-               return irq_num;
+       pirq->nirqs = dev->info->port_nirqs;
+       pirq->reg_mask = dev->dev_ops->get_port_addr(p, REG_PORT_INT_MASK);
+       pirq->reg_status = dev->dev_ops->get_port_addr(p, REG_PORT_INT_STATUS);
+       snprintf(pirq->name, sizeof(pirq->name), "port_irq-%d", p);
 
-       snprintf(port->pirq.name, sizeof(port->pirq.name), "port_irq-%d", p);
+       pirq->irq_num = irq_find_mapping(dev->girq.domain, p);
+       if (pirq->irq_num < 0)
+               return pirq->irq_num;
 
-       ret = request_threaded_irq(irq_num, NULL, ksz_pirq_thread_fn,
-                                  IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
-                                  port->pirq.name, port);
-       if (ret)
-               goto out;
-
-       return 0;
-
-out:
-       ksz_pirq_free(dev, p);
-
-       return ret;
+       return ksz_irq_common_setup(dev, pirq);
 }
 
 static int ksz_setup(struct dsa_switch *ds)
@@ -2119,10 +2005,10 @@ static int ksz_setup(struct dsa_switch *ds)
 out_pirq:
        if (dev->irq > 0)
                dsa_switch_for_each_user_port(dp, dev->ds)
-                       ksz_pirq_free(dev, dp->index);
+                       ksz_irq_free(&dev->ports[dp->index].pirq);
 out_girq:
        if (dev->irq > 0)
-               ksz_girq_free(dev);
+               ksz_irq_free(&dev->girq);
 
        return ret;
 }
@@ -2134,9 +2020,9 @@ static void ksz_teardown(struct dsa_switch *ds)
 
        if (dev->irq > 0) {
                dsa_switch_for_each_user_port(dp, dev->ds)
-                       ksz_pirq_free(dev, dp->index);
+                       ksz_irq_free(&dev->ports[dp->index].pirq);
 
-               ksz_girq_free(dev);
+               ksz_irq_free(&dev->girq);
        }
 
        if (dev->dev_ops->teardown)

diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 6edce587bfd2b210a5f9e5ae34e7ad0e15bb5a49..9cfa179575ce85dc9b92f063e6fd8ec25ac26b0c 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -72,10 +72,13 @@ struct ksz_chip_data {
 
 struct ksz_irq {
        u16 masked;
-       struct irq_chip chip;
+       u16 reg_mask;
+       u16 reg_status;
        struct irq_domain *domain;
        int nirqs;
+       int irq_num;
        char name[16];
+       struct ksz_device *dev;
 };
 
 struct ksz_port {
@@ -574,8 +577,8 @@ static inline int is_lan937x(struct ksz_device *dev)
 #define P_MII_SEL_M                    0x3
 
 /* Interrupt */
-#define REG_SW_PORT_INT_STATUS__4      0x0018
-#define REG_SW_PORT_INT_MASK__4                0x001C
+#define REG_SW_PORT_INT_STATUS__1      0x001B
+#define REG_SW_PORT_INT_MASK__1                0x001F
 
 #define REG_PORT_INT_STATUS            0x001B
 #define REG_PORT_INT_MASK              0x001F