Question about PCI express

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Fulgurance
Posts: 16
Joined: Thu Apr 02, 2020 5:24 pm

Question about PCI express

Post by Fulgurance »

Hello, today i have read OS Dev documentation about PCI Express, but this documentation isn't finished. How can i send and receive data from devices ? It's not explained.
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Octocontrabass
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Joined: Mon Mar 25, 2013 7:01 pm

Re: Question about PCI express

Post by Octocontrabass »

What needs to be explained? The BARs work the same in PCI and PCIe.
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nullplan
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Joined: Wed Aug 30, 2017 8:24 am

Re: Question about PCI express

Post by nullplan »

To expand on this: It is just PCI. From a software perspective, there is no major difference between PCI and PCIe. The MMIO config stuff is nice, but not tied to PCIe.
Carpe diem!
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Fulgurance
Posts: 16
Joined: Thu Apr 02, 2020 5:24 pm

Re: Question about PCI express

Post by Fulgurance »

Oh okay... thanks
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