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Message-Id: <20240115091621.23312-1-jiawenwu@trustnetic.com>
Date: Mon, 15 Jan 2024 17:16:21 +0800
From: Jiawen Wu <jiawenwu@...stnetic.com>
To: davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
linux@...linux.org.uk,
horms@...nel.org,
andrew@...n.ch,
netdev@...r.kernel.org
Cc: mengyuanlou@...-swift.com,
Jiawen Wu <jiawenwu@...stnetic.com>
Subject: [RFC PATCH net-next] net: txgbe: use irq_domain for interrupt controller
Use irq_domain infrastructure for MAC interrupt controller, which above
the GPIO interrupt controller.
Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>
---
drivers/net/ethernet/wangxun/libwx/wx_hw.c | 2 -
drivers/net/ethernet/wangxun/libwx/wx_lib.c | 20 ++-
drivers/net/ethernet/wangxun/libwx/wx_type.h | 1 -
.../net/ethernet/wangxun/txgbe/txgbe_main.c | 119 +++++++++++++++++-
.../net/ethernet/wangxun/txgbe/txgbe_phy.c | 68 +++++-----
.../net/ethernet/wangxun/txgbe/txgbe_phy.h | 1 +
.../net/ethernet/wangxun/txgbe/txgbe_type.h | 10 ++
7 files changed, 165 insertions(+), 56 deletions(-)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 1db754615cca..945c13d1a982 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1958,8 +1958,6 @@ int wx_sw_init(struct wx *wx)
return -ENOMEM;
}
- wx->msix_in_use = false;
-
return 0;
}
EXPORT_SYMBOL(wx_sw_init);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 23355cc408fd..e681244c6684 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -1614,14 +1614,12 @@ static int wx_acquire_msix_vectors(struct wx *wx)
/* One for non-queue interrupts */
nvecs += 1;
- if (!wx->msix_in_use) {
- wx->msix_entry = kcalloc(1, sizeof(struct msix_entry),
- GFP_KERNEL);
- if (!wx->msix_entry) {
- kfree(wx->msix_q_entries);
- wx->msix_q_entries = NULL;
- return -ENOMEM;
- }
+ wx->msix_entry = kcalloc(1, sizeof(struct msix_entry),
+ GFP_KERNEL);
+ if (!wx->msix_entry) {
+ kfree(wx->msix_q_entries);
+ wx->msix_q_entries = NULL;
+ return -ENOMEM;
}
nvecs = pci_alloc_irq_vectors_affinity(wx->pdev, nvecs,
@@ -1931,10 +1929,8 @@ void wx_reset_interrupt_capability(struct wx *wx)
if (pdev->msix_enabled) {
kfree(wx->msix_q_entries);
wx->msix_q_entries = NULL;
- if (!wx->msix_in_use) {
- kfree(wx->msix_entry);
- wx->msix_entry = NULL;
- }
+ kfree(wx->msix_entry);
+ wx->msix_entry = NULL;
}
pci_free_irq_vectors(wx->pdev);
}
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index b4dc4f341117..1fdeb464d5f4 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -1047,7 +1047,6 @@ struct wx {
unsigned int queues_per_pool;
struct msix_entry *msix_q_entries;
struct msix_entry *msix_entry;
- bool msix_in_use;
struct wx_ring_feature ring_feature[RING_F_ARRAY_SIZE];
/* misc interrupt status block */
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index 3b151c410a5c..017f0e43bf34 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -7,6 +7,7 @@
#include <linux/netdevice.h>
#include <linux/string.h>
#include <linux/etherdevice.h>
+#include <linux/irqdomain.h>
#include <linux/phylink.h>
#include <net/ip.h>
#include <linux/if_vlan.h>
@@ -203,6 +204,110 @@ static int txgbe_request_irq(struct wx *wx)
return err;
}
+static void txgbe_misc_irq_mask(struct irq_data *d)
+{
+}
+
+static void txgbe_misc_irq_unmask(struct irq_data *d)
+{
+ struct txgbe *txgbe = irq_data_get_irq_chip_data(d);
+ struct wx *wx = txgbe->wx;
+
+ wx_intr_enable(wx, TXGBE_INTR_MISC);
+}
+
+static const struct irq_chip txgbe_irq_chip = {
+ .name = "txgbe-misc-irq",
+ .irq_mask = txgbe_misc_irq_mask,
+ .irq_unmask = txgbe_misc_irq_unmask,
+};
+
+static int txgbe_misc_irq_domain_map(struct irq_domain *d,
+ unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ struct txgbe *txgbe = d->host_data;
+
+ irq_set_chip_data(irq, txgbe);
+ irq_set_chip(irq, &txgbe->misc.chip);
+ irq_set_nested_thread(irq, 1);
+ irq_set_noprobe(irq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops txgbe_misc_irq_domain_ops = {
+ .map = txgbe_misc_irq_domain_map,
+};
+
+static irqreturn_t txgbe_misc_irq_handle(int irq, void *data)
+{
+ struct txgbe *txgbe = data;
+ struct wx *wx = txgbe->wx;
+ u32 eicr;
+
+ eicr = wx_misc_isb(wx, WX_ISB_MISC);
+
+ handle_nested_irq(txgbe->gpio_irq);
+
+ if (eicr & (TXGBE_PX_MISC_ETH_LK | TXGBE_PX_MISC_ETH_LKDN |
+ TXGBE_PX_MISC_ETH_AN)) {
+ u32 reg = rd32(wx, TXGBE_CFG_PORT_ST);
+
+ phylink_mac_change(wx->phylink, !!(reg & TXGBE_CFG_PORT_ST_LINK_UP));
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void txgbe_del_misc_irq(struct txgbe *txgbe)
+{
+ int hwirq, virq;
+
+ for (hwirq = 0; hwirq < txgbe->misc.nirqs; hwirq++) {
+ virq = irq_find_mapping(txgbe->misc.domain, hwirq);
+ irq_dispose_mapping(virq);
+ }
+
+ irq_domain_remove(txgbe->misc.domain);
+}
+
+static void txgbe_free_misc_irq(struct txgbe *txgbe)
+{
+ free_irq(txgbe->misc.irq, txgbe);
+ txgbe_del_misc_irq(txgbe);
+}
+
+static int txgbe_setup_misc_irq(struct txgbe *txgbe)
+{
+ struct wx *wx = txgbe->wx;
+ int hwirq, err;
+
+ txgbe->misc.nirqs = 1;
+ txgbe->misc.domain = irq_domain_add_simple(NULL, txgbe->misc.nirqs, 0,
+ &txgbe_misc_irq_domain_ops, txgbe);
+ if (!txgbe->misc.domain)
+ return -ENOMEM;
+
+ for (hwirq = 0; hwirq < txgbe->misc.nirqs; hwirq++)
+ irq_create_mapping(txgbe->misc.domain, hwirq);
+
+ txgbe->misc.chip = txgbe_irq_chip;
+ if (wx->pdev->msix_enabled)
+ txgbe->misc.irq = wx->msix_entry->vector;
+ else
+ txgbe->misc.irq = wx->pdev->irq;
+
+ err = request_threaded_irq(txgbe->misc.irq, NULL,
+ txgbe_misc_irq_handle,
+ IRQF_ONESHOT,
+ wx->netdev->name, txgbe);
+ if (err)
+ txgbe_del_misc_irq(txgbe);
+
+ return err;
+}
+
static void txgbe_up_complete(struct wx *wx)
{
struct net_device *netdev = wx->netdev;
@@ -518,6 +623,7 @@ static void txgbe_shutdown(struct pci_dev *pdev)
int txgbe_setup_tc(struct net_device *dev, u8 tc)
{
struct wx *wx = netdev_priv(dev);
+ struct txgbe *txgbe = wx->priv;
/* Hardware has to reinitialize queues and interrupts to
* match packet buffer alignment. Unfortunately, the
@@ -528,6 +634,8 @@ int txgbe_setup_tc(struct net_device *dev, u8 tc)
else
txgbe_reset(wx);
+ free_irq(txgbe->gpio_irq, txgbe);
+ txgbe_free_misc_irq(txgbe);
wx_clear_interrupt_scheme(wx);
if (tc)
@@ -536,6 +644,8 @@ int txgbe_setup_tc(struct net_device *dev, u8 tc)
netdev_reset_tc(dev);
wx_init_interrupt_scheme(wx);
+ txgbe_setup_misc_irq(txgbe);
+ txgbe_request_gpio_irq(txgbe);
if (netif_running(dev))
txgbe_open(dev);
@@ -751,10 +861,14 @@ static int txgbe_probe(struct pci_dev *pdev,
txgbe->wx = wx;
wx->priv = txgbe;
- err = txgbe_init_phy(txgbe);
+ err = txgbe_setup_misc_irq(txgbe);
if (err)
goto err_release_hw;
+ err = txgbe_init_phy(txgbe);
+ if (err)
+ goto err_free_misc_irq;
+
err = register_netdev(netdev);
if (err)
goto err_remove_phy;
@@ -781,6 +895,8 @@ static int txgbe_probe(struct pci_dev *pdev,
err_remove_phy:
txgbe_remove_phy(txgbe);
+err_free_misc_irq:
+ txgbe_free_misc_irq(txgbe);
err_release_hw:
wx_clear_interrupt_scheme(wx);
wx_control_hw(wx, false);
@@ -813,6 +929,7 @@ static void txgbe_remove(struct pci_dev *pdev)
unregister_netdev(netdev);
txgbe_remove_phy(txgbe);
+ txgbe_free_misc_irq(txgbe);
pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
index 1b84d495d14e..253d5a2c9063 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.c
@@ -437,7 +437,7 @@ static int txgbe_gpio_set_type(struct irq_data *d, unsigned int type)
}
static const struct irq_chip txgbe_gpio_irq_chip = {
- .name = "txgbe_gpio_irq",
+ .name = "txgbe-gpio-irq",
.irq_ack = txgbe_gpio_irq_ack,
.irq_mask = txgbe_gpio_irq_mask,
.irq_unmask = txgbe_gpio_irq_unmask,
@@ -446,29 +446,23 @@ static const struct irq_chip txgbe_gpio_irq_chip = {
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
-static void txgbe_irq_handler(struct irq_desc *desc)
+static irqreturn_t txgbe_gpio_irq_handler(int irq, void *data)
{
- struct irq_chip *chip = irq_desc_get_chip(desc);
- struct wx *wx = irq_desc_get_handler_data(desc);
- struct txgbe *txgbe = wx->priv;
+ struct txgbe *txgbe = data;
+ struct wx *wx = txgbe->wx;
+ unsigned long irq_status;
irq_hw_number_t hwirq;
- unsigned long gpioirq;
struct gpio_chip *gc;
unsigned long flags;
- u32 eicr;
-
- eicr = wx_misc_isb(wx, WX_ISB_MISC);
- chained_irq_enter(chip, desc);
-
- gpioirq = rd32(wx, WX_GPIO_INTSTATUS);
+ irq_status = rd32(wx, WX_GPIO_INTSTATUS);
gc = txgbe->gpio;
- for_each_set_bit(hwirq, &gpioirq, gc->ngpio) {
+ for_each_set_bit(hwirq, &irq_status, gc->ngpio) {
int gpio = irq_find_mapping(gc->irq.domain, hwirq);
u32 irq_type = irq_get_trigger_type(gpio);
- generic_handle_domain_irq(gc->irq.domain, hwirq);
+ handle_nested_irq(gpio);
if ((irq_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
raw_spin_lock_irqsave(&wx->gpio_lock, flags);
@@ -477,17 +471,10 @@ static void txgbe_irq_handler(struct irq_desc *desc)
}
}
- chained_irq_exit(chip, desc);
-
- if (eicr & (TXGBE_PX_MISC_ETH_LK | TXGBE_PX_MISC_ETH_LKDN |
- TXGBE_PX_MISC_ETH_AN)) {
- u32 reg = rd32(wx, TXGBE_CFG_PORT_ST);
-
- phylink_mac_change(wx->phylink, !!(reg & TXGBE_CFG_PORT_ST_LINK_UP));
- }
-
/* unmask interrupt */
wx_intr_enable(wx, TXGBE_INTR_MISC);
+
+ return IRQ_HANDLED;
}
static int txgbe_gpio_init(struct txgbe *txgbe)
@@ -524,19 +511,6 @@ static int txgbe_gpio_init(struct txgbe *txgbe)
girq = &gc->irq;
gpio_irq_chip_set_chip(girq, &txgbe_gpio_irq_chip);
- girq->parent_handler = txgbe_irq_handler;
- girq->parent_handler_data = wx;
- girq->num_parents = 1;
- girq->parents = devm_kcalloc(dev, girq->num_parents,
- sizeof(*girq->parents), GFP_KERNEL);
- if (!girq->parents)
- return -ENOMEM;
-
- /* now only suuported on MSI-X interrupt */
- if (!wx->msix_entry)
- return -EPERM;
-
- girq->parents[0] = wx->msix_entry->vector;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
@@ -549,6 +523,14 @@ static int txgbe_gpio_init(struct txgbe *txgbe)
return 0;
}
+int txgbe_request_gpio_irq(struct txgbe *txgbe)
+{
+ txgbe->gpio_irq = irq_find_mapping(txgbe->misc.domain, 0);
+ return request_threaded_irq(txgbe->gpio_irq, NULL,
+ txgbe_gpio_irq_handler,
+ IRQF_ONESHOT, "txgbe-gpio-irq", txgbe);
+}
+
static int txgbe_clock_register(struct txgbe *txgbe)
{
struct pci_dev *pdev = txgbe->wx->pdev;
@@ -736,10 +718,16 @@ int txgbe_init_phy(struct txgbe *txgbe)
goto err_destroy_phylink;
}
+ ret = txgbe_request_gpio_irq(txgbe);
+ if (ret) {
+ wx_err(wx, "failed to request gpio irq\n");
+ goto err_destroy_phylink;
+ }
+
ret = txgbe_clock_register(txgbe);
if (ret) {
wx_err(wx, "failed to register clock: %d\n", ret);
- goto err_destroy_phylink;
+ goto err_free_gpio_irq;
}
ret = txgbe_i2c_register(txgbe);
@@ -754,8 +742,6 @@ int txgbe_init_phy(struct txgbe *txgbe)
goto err_unregister_i2c;
}
- wx->msix_in_use = true;
-
return 0;
err_unregister_i2c:
@@ -763,6 +749,8 @@ int txgbe_init_phy(struct txgbe *txgbe)
err_unregister_clk:
clkdev_drop(txgbe->clock);
clk_unregister(txgbe->clk);
+err_free_gpio_irq:
+ free_irq(txgbe->gpio_irq, txgbe);
err_destroy_phylink:
phylink_destroy(wx->phylink);
err_destroy_xpcs:
@@ -785,8 +773,8 @@ void txgbe_remove_phy(struct txgbe *txgbe)
platform_device_unregister(txgbe->i2c_dev);
clkdev_drop(txgbe->clock);
clk_unregister(txgbe->clk);
+ free_irq(txgbe->gpio_irq, txgbe);
phylink_destroy(txgbe->wx->phylink);
xpcs_destroy(txgbe->xpcs);
software_node_unregister_node_group(txgbe->nodes.group);
- txgbe->wx->msix_in_use = false;
}
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.h
index 1ab592124986..9fac5c911e37 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_phy.h
@@ -4,6 +4,7 @@
#ifndef _TXGBE_PHY_H_
#define _TXGBE_PHY_H_
+int txgbe_request_gpio_irq(struct txgbe *txgbe);
int txgbe_init_phy(struct txgbe *txgbe);
void txgbe_remove_phy(struct txgbe *txgbe);
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
index 270a6fd9ad0b..45d84d20372a 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
@@ -5,6 +5,7 @@
#define _TXGBE_TYPE_H_
#include <linux/property.h>
+#include <linux/irq.h>
/* Device IDs */
#define TXGBE_DEV_ID_SP1000 0x1001
@@ -169,15 +170,24 @@ struct txgbe_nodes {
const struct software_node *group[SWNODE_MAX + 1];
};
+struct txgbe_irq {
+ struct irq_chip chip;
+ struct irq_domain *domain;
+ int nirqs;
+ int irq;
+};
+
struct txgbe {
struct wx *wx;
struct txgbe_nodes nodes;
+ struct txgbe_irq misc;
struct dw_xpcs *xpcs;
struct platform_device *sfp_dev;
struct platform_device *i2c_dev;
struct clk_lookup *clock;
struct clk *clk;
struct gpio_chip *gpio;
+ unsigned int gpio_irq;
};
#endif /* _TXGBE_TYPE_H_ */
--
2.27.0
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