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* [dpdk-dev] device reset handling with igb_uio
       [not found] <CAJ-v4=TYVQA_mgJmubJZqivJ19ZRfb460bRDeYuatUXmnr=NnA@mail.gmail.com>
@ 2019-06-14 13:57 ` Santosh R
  0 siblings, 0 replies; only message in thread
From: Santosh R @ 2019-06-14 13:57 UTC (permalink / raw)
  To: dev

 Hi,

    I have some question on igb_uio.
From the below function call traces, vfio-pci module frees/allocates msi-x
vector table as part of
interrupt disable/enable. Where as igb-uio module, only masks/unmasks the
msi-x interrupt.
Does this mean, when using igb_uio, device can't undergo reset which clears
MSI-X vector table?
How to handle device reset with igb_uio?

igb-uio:
rte_intr_disable->uio_intr_disable->igbuio_pci_irqcontrol->pci_msi_mask_irq
rte_intr_enable->uio_intr_enable->igbuio_pci_irqcontrol->pci_msi_unmask_irq

igbuio_pci_open->igbuio_pci_enable_interrupts->pci_alloc_irq_vectors/request_irq
igbuio_pci_release->igbuio_pci_disable_interrupts->free_irq->pci_free_irq_vectors

vfio-pci:
rte_intr_disable->vfio_disable_msix->vfio_pci_ioctl->vfio_msi_disable->pci_free_irq_vectors
rte_intr_enable->vfio_enable_msix->vfio_pci_ioctl->vfio_msi_enable->pci_alloc_irq_vectors/vfio_msi_set_vector_signal->request_irq

Regards
-Santosh

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     [not found] <CAJ-v4=TYVQA_mgJmubJZqivJ19ZRfb460bRDeYuatUXmnr=NnA@mail.gmail.com>
2019-06-14 13:57 ` [dpdk-dev] device reset handling with igb_uio Santosh R

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