PCIe DMA Driver for Linux

Question

I am currently working on a Virtex 7 FPGA . I am trying to install the driver for the PCIe DMA driver for linux . But it is giving me the following error :

error: implicit declaration of function ‘pci_enable_msix’ [-Werror=implicit-function-declaration]

Can someone help me with this error ?

Please post the text of the error rather than an image. Your post is unusable by those users with mobile devices or behind many corporate proxies. It's also difficult to read even on a typical laptop display.. — Ken White
– Ken White, Commented Mar 9, 2018 at 23:37
error: implicit declaration of function ‘pci_enable_msix’ . This is the error I receive. — Sushrut Kaul
– Sushrut Kaul, Commented Mar 9, 2018 at 23:39
The entire error message, in the question itself instead of the image. Posting it in a comment does absolutely nothing to address the issues I described. — Ken White
– Ken White, Commented Mar 9, 2018 at 23:40

a3f · Accepted Answer · 2018-03-10 07:22:07Z

2

Linux 4.8 replaced it with pci_enable_msix_range. You can fix it like this:

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,8,0)
        rc = pci_enable_msix(pdev, lro->entry, req_nvec);
#else
        rc = pci_enable_msix_range(pdev, lro->entry, req_nvec, req_nvec);
#endif

answered Mar 10, 2018 at 7:22

a3f

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1 Comment

0andriy Over a year ago

And you missed even more updates to this API, nowadays the both you mentioned are obsolete, one needs to call pci_alloc_irq_vectors() (IIRC the name of the call).

Jamey Hicks · Accepted Answer · 2018-03-19 13:25:57Z

0

Linux cross reference is a very good resource for this kind of problem, because you can explore the change in API over kernel version.

answered Mar 19, 2018 at 13:25

Jamey Hicks

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