@@ -1686,6 +1686,7 @@ static int wx_set_interrupt_capability(struct wx *wx)
}
pdev->irq = pci_irq_vector(pdev, 0);
+ wx->num_q_vectors = 1;
return 0;
}
@@ -1996,7 +1997,8 @@ void wx_free_irq(struct wx *wx)
int vector;
if (!(pdev->msix_enabled)) {
- free_irq(pdev->irq, wx);
+ if (wx->mac.type == wx_mac_em)
+ free_irq(pdev->irq, wx);
return;
}
@@ -2026,6 +2028,9 @@ int wx_setup_isb_resources(struct wx *wx)
{
struct pci_dev *pdev = wx->pdev;
+ if (wx->isb_mem)
+ return 0;
+
wx->isb_mem = dma_alloc_coherent(&pdev->dev,
sizeof(u32) * 4,
&wx->isb_dma,
@@ -2049,6 +2054,9 @@ void wx_free_isb_resources(struct wx *wx)
{
struct pci_dev *pdev = wx->pdev;
+ if (!wx->isb_mem)
+ return;
+
dma_free_coherent(&pdev->dev, sizeof(u32) * 4,
wx->isb_mem, wx->isb_dma);
wx->isb_mem = NULL;
@@ -2385,7 +2393,8 @@ static void wx_free_all_tx_resources(struct wx *wx)
void wx_free_resources(struct wx *wx)
{
- wx_free_isb_resources(wx);
+ if (wx->mac.type == wx_mac_em)
+ wx_free_isb_resources(wx);
wx_free_all_rx_resources(wx);
wx_free_all_tx_resources(wx);
}
@@ -27,57 +27,19 @@ void txgbe_irq_enable(struct wx *wx, bool queues)
}
/**
- * txgbe_intr - msi/legacy mode Interrupt Handler
- * @irq: interrupt number
- * @data: pointer to a network interface device structure
- **/
-static irqreturn_t txgbe_intr(int __always_unused irq, void *data)
-{
- struct wx_q_vector *q_vector;
- struct wx *wx = data;
- struct pci_dev *pdev;
- u32 eicr;
-
- q_vector = wx->q_vector[0];
- pdev = wx->pdev;
-
- eicr = wx_misc_isb(wx, WX_ISB_VEC0);
- if (!eicr) {
- /* shared interrupt alert!
- * the interrupt that we masked before the ICR read.
- */
- if (netif_running(wx->netdev))
- txgbe_irq_enable(wx, true);
- return IRQ_NONE; /* Not our interrupt */
- }
- wx->isb_mem[WX_ISB_VEC0] = 0;
- if (!(pdev->msi_enabled))
- wr32(wx, WX_PX_INTA, 1);
-
- wx->isb_mem[WX_ISB_MISC] = 0;
- /* would disable interrupts here but it is auto disabled */
- napi_schedule_irqoff(&q_vector->napi);
-
- /* re-enable link(maybe) and non-queue interrupts, no flush.
- * txgbe_poll will re-enable the queue interrupts
- */
- if (netif_running(wx->netdev))
- txgbe_irq_enable(wx, false);
-
- return IRQ_HANDLED;
-}
-
-/**
- * txgbe_request_msix_irqs - Initialize MSI-X interrupts
+ * txgbe_request_queue_irqs - Initialize MSI-X queue interrupts
* @wx: board private structure
*
- * Allocate MSI-X vectors and request interrupts from the kernel.
+ * Allocate MSI-X queue vectors and request interrupts from the kernel.
**/
-static int txgbe_request_msix_irqs(struct wx *wx)
+int txgbe_request_queue_irqs(struct wx *wx)
{
struct net_device *netdev = wx->netdev;
int vector, err;
+ if (!wx->pdev->msix_enabled)
+ return 0;
+
for (vector = 0; vector < wx->num_q_vectors; vector++) {
struct wx_q_vector *q_vector = wx->q_vector[vector];
struct msix_entry *entry = &wx->msix_q_entries[vector];
@@ -110,34 +72,6 @@ static int txgbe_request_msix_irqs(struct wx *wx)
return err;
}
-/**
- * txgbe_request_irq - initialize interrupts
- * @wx: board private structure
- *
- * Attempt to configure interrupts using the best available
- * capabilities of the hardware and kernel.
- **/
-int txgbe_request_irq(struct wx *wx)
-{
- struct net_device *netdev = wx->netdev;
- struct pci_dev *pdev = wx->pdev;
- int err;
-
- if (pdev->msix_enabled)
- err = txgbe_request_msix_irqs(wx);
- else if (pdev->msi_enabled)
- err = request_irq(wx->pdev->irq, &txgbe_intr, 0,
- netdev->name, wx);
- else
- err = request_irq(wx->pdev->irq, &txgbe_intr, IRQF_SHARED,
- netdev->name, wx);
-
- if (err)
- wx_err(wx, "request_irq failed, Error %d\n", err);
-
- return err;
-}
-
static int txgbe_request_gpio_irq(struct txgbe *txgbe)
{
txgbe->gpio_irq = irq_find_mapping(txgbe->misc.domain, TXGBE_IRQ_GPIO);
@@ -177,6 +111,36 @@ static const struct irq_domain_ops txgbe_misc_irq_domain_ops = {
};
static irqreturn_t txgbe_misc_irq_handle(int irq, void *data)
+{
+ struct wx_q_vector *q_vector;
+ struct txgbe *txgbe = data;
+ struct wx *wx = txgbe->wx;
+ u32 eicr;
+
+ if (wx->pdev->msix_enabled)
+ return IRQ_WAKE_THREAD;
+
+ eicr = wx_misc_isb(wx, WX_ISB_VEC0);
+ if (!eicr) {
+ /* shared interrupt alert!
+ * the interrupt that we masked before the ICR read.
+ */
+ if (netif_running(wx->netdev))
+ txgbe_irq_enable(wx, true);
+ return IRQ_NONE; /* Not our interrupt */
+ }
+ wx->isb_mem[WX_ISB_VEC0] = 0;
+ if (!(wx->pdev->msi_enabled))
+ wr32(wx, WX_PX_INTA, 1);
+
+ /* would disable interrupts here but it is auto disabled */
+ q_vector = wx->q_vector[0];
+ napi_schedule_irqoff(&q_vector->napi);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t txgbe_misc_irq_thread_fn(int irq, void *data)
{
struct txgbe *txgbe = data;
struct wx *wx = txgbe->wx;
@@ -223,6 +187,7 @@ void txgbe_free_misc_irq(struct txgbe *txgbe)
int txgbe_setup_misc_irq(struct txgbe *txgbe)
{
+ unsigned long flags = IRQF_ONESHOT;
struct wx *wx = txgbe->wx;
int hwirq, err;
@@ -236,14 +201,17 @@ int txgbe_setup_misc_irq(struct txgbe *txgbe)
irq_create_mapping(txgbe->misc.domain, hwirq);
txgbe->misc.chip = txgbe_irq_chip;
- if (wx->pdev->msix_enabled)
+ if (wx->pdev->msix_enabled) {
txgbe->misc.irq = wx->msix_entry->vector;
- else
+ } else {
txgbe->misc.irq = wx->pdev->irq;
+ if (!wx->pdev->msi_enabled)
+ flags |= IRQF_SHARED;
+ }
- err = request_threaded_irq(txgbe->misc.irq, NULL,
- txgbe_misc_irq_handle,
- IRQF_ONESHOT,
+ err = request_threaded_irq(txgbe->misc.irq, txgbe_misc_irq_handle,
+ txgbe_misc_irq_thread_fn,
+ flags,
wx->netdev->name, txgbe);
if (err)
goto del_misc_irq;
@@ -2,6 +2,6 @@
/* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */
void txgbe_irq_enable(struct wx *wx, bool queues);
-int txgbe_request_irq(struct wx *wx);
+int txgbe_request_queue_irqs(struct wx *wx);
void txgbe_free_misc_irq(struct txgbe *txgbe);
int txgbe_setup_misc_irq(struct txgbe *txgbe);
@@ -294,7 +294,7 @@ static int txgbe_open(struct net_device *netdev)
wx_configure(wx);
- err = txgbe_request_irq(wx);
+ err = txgbe_request_queue_irqs(wx);
if (err)
goto err_free_isb;
@@ -729,6 +729,7 @@ static void txgbe_remove(struct pci_dev *pdev)
txgbe_remove_phy(txgbe);
txgbe_free_misc_irq(txgbe);
+ wx_free_isb_resources(wx);
pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
When using MSI or INTx interrupts, request_irq() for pdev->irq will conflict with request_threaded_irq() for txgbe->misc.irq, to cause system crash. Fixes: aefd013624a1 ("net: txgbe: use irq_domain for interrupt controller") Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> --- drivers/net/ethernet/wangxun/libwx/wx_lib.c | 13 +- .../net/ethernet/wangxun/txgbe/txgbe_irq.c | 122 +++++++----------- .../net/ethernet/wangxun/txgbe/txgbe_irq.h | 2 +- .../net/ethernet/wangxun/txgbe/txgbe_main.c | 3 +- 4 files changed, 59 insertions(+), 81 deletions(-)