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net: txgbe: move interrupt codes to a separate file
In order to change the interrupt response structure, there will be a lot of code added next. Move these interrupt codes to a new file, to make the codes cleaner. Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Jiawen Wu
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David S. Miller
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Jan 27, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
| /* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */ | ||
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| #include <linux/pci.h> | ||
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| #include "../libwx/wx_type.h" | ||
| #include "../libwx/wx_lib.h" | ||
| #include "../libwx/wx_hw.h" | ||
| #include "txgbe_type.h" | ||
| #include "txgbe_irq.h" | ||
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| /** | ||
| * txgbe_irq_enable - Enable default interrupt generation settings | ||
| * @wx: pointer to private structure | ||
| * @queues: enable irqs for queues | ||
| **/ | ||
| void txgbe_irq_enable(struct wx *wx, bool queues) | ||
| { | ||
| wr32(wx, WX_PX_MISC_IEN, TXGBE_PX_MISC_IEN_MASK); | ||
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| /* unmask interrupt */ | ||
| wx_intr_enable(wx, TXGBE_INTR_MISC); | ||
| if (queues) | ||
| wx_intr_enable(wx, TXGBE_INTR_QALL(wx)); | ||
| } | ||
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| /** | ||
| * 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; | ||
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| q_vector = wx->q_vector[0]; | ||
| pdev = wx->pdev; | ||
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| 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); | ||
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| wx->isb_mem[WX_ISB_MISC] = 0; | ||
| /* would disable interrupts here but it is auto disabled */ | ||
| napi_schedule_irqoff(&q_vector->napi); | ||
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| /* 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); | ||
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| return IRQ_HANDLED; | ||
| } | ||
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| /** | ||
| * txgbe_request_msix_irqs - Initialize MSI-X interrupts | ||
| * @wx: board private structure | ||
| * | ||
| * Allocate MSI-X vectors and request interrupts from the kernel. | ||
| **/ | ||
| static int txgbe_request_msix_irqs(struct wx *wx) | ||
| { | ||
| struct net_device *netdev = wx->netdev; | ||
| int vector, err; | ||
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| 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]; | ||
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| if (q_vector->tx.ring && q_vector->rx.ring) | ||
| snprintf(q_vector->name, sizeof(q_vector->name) - 1, | ||
| "%s-TxRx-%d", netdev->name, entry->entry); | ||
| else | ||
| /* skip this unused q_vector */ | ||
| continue; | ||
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| err = request_irq(entry->vector, wx_msix_clean_rings, 0, | ||
| q_vector->name, q_vector); | ||
| if (err) { | ||
| wx_err(wx, "request_irq failed for MSIX interrupt %s Error: %d\n", | ||
| q_vector->name, err); | ||
| goto free_queue_irqs; | ||
| } | ||
| } | ||
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| return 0; | ||
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| free_queue_irqs: | ||
| while (vector) { | ||
| vector--; | ||
| free_irq(wx->msix_q_entries[vector].vector, | ||
| wx->q_vector[vector]); | ||
| } | ||
| wx_reset_interrupt_capability(wx); | ||
| return err; | ||
| } | ||
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| /** | ||
| * 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; | ||
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| 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); | ||
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| if (err) | ||
| wx_err(wx, "request_irq failed, Error %d\n", err); | ||
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| return err; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| /* SPDX-License-Identifier: GPL-2.0 */ | ||
| /* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */ | ||
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| void txgbe_irq_enable(struct wx *wx, bool queues); | ||
| int txgbe_request_irq(struct wx *wx); |
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