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52 lines
1.4 KiB
Diff
52 lines
1.4 KiB
Diff
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From 3734c2c9ac0fd763deceb686efc93b293acca4c6 Mon Sep 17 00:00:00 2001
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From: Jan Kiszka <jan.kiszka@siemens.com>
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Date: Sun, 27 Nov 2016 15:15:51 +0100
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Subject: [PATCH] ivshmem-net: Enable INTx
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Activate INTx notification when it has to be used instead of MSI-X,
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disable it after use.
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Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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(cherry picked from commit 8790717bdca6ea58f18baac1749ac347b23b7263)
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---
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drivers/net/ivshmem-net.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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--- a/drivers/net/ivshmem-net.c
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+++ b/drivers/net/ivshmem-net.c
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@@ -31,6 +31,8 @@
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#define JAILHOUSE_CFG_SHMEM_PTR 0x40
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#define JAILHOUSE_CFG_SHMEM_SZ 0x48
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+#define IVSHMEM_INTX_ENABLE 0x1
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+
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#define IVSHM_NET_STATE_RESET 0
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#define IVSHM_NET_STATE_INIT 1
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#define IVSHM_NET_STATE_READY 2
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@@ -47,7 +49,7 @@
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#define IVSHM_NET_VQ_ALIGN 64
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struct ivshmem_regs {
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- u32 imask;
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+ u32 intxctrl;
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u32 istat;
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u32 ivpos;
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u32 doorbell;
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@@ -869,6 +871,8 @@ static int ivshm_net_probe(struct pci_de
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goto err_int;
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pci_set_master(pdev);
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+ if (!in->using_msix)
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+ writel(IVSHMEM_INTX_ENABLE, &in->ivshm_regs->intxctrl);
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writel(IVSHM_NET_STATE_RESET, &in->ivshm_regs->lstate);
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@@ -895,6 +899,7 @@ static void ivshm_net_remove(struct pci_
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free_irq(in->msix.vector, ndev);
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pci_disable_msix(pdev);
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} else {
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+ writel(0, &in->ivshm_regs->intxctrl);
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free_irq(pdev->irq, ndev);
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}
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