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Altera_Forum
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12 years ago

Implementing MSI/X Interrupts using Cyclone V Hard IP for PCI Express

Hello, I'm fairly new to using Altera tools but I've been having problems setting up MSI/X interrupts in Qsys. I thought I would include as much info as I can in the bullet points below f...
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Altera_Forum
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11 years ago

I Jayan.mistry,

I've got the nearly same problem as you. I connected several irq on RXmirq pcie-interrupt port and activated it in CRA registers (0x0050).

And I've got only one MSI message in host side, whatever the irq is raised on RXmirq port.

However, the host told me that 4 msi are available :

In linux function -> pci_msi_vec_count(pdev) return 4. But pci_enable_msi_range(pdev, 1, 4) return only 1.

Martoni.