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| Started by | lex000luthor <lex000luthor@gmail.com> |
|---|---|
| First post | 2017-02-17 23:30 +0100 |
| Last post | 2017-02-17 23:30 +0100 |
| Articles | 1 — 1 participant |
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Userspace mmap to PCI is failing lex000luthor <lex000luthor@gmail.com> - 2017-02-17 23:30 +0100
| From | lex000luthor <lex000luthor@gmail.com> |
|---|---|
| Date | 2017-02-17 23:30 +0100 |
| Subject | Userspace mmap to PCI is failing |
| Message-ID | <tbZcm-1Pb-11@gated-at.bofh.it> |
Hello,
I am trying to mmap a PCI device, but it fails with EINVAL.
<snip>
...
fd = open("/dev/mem", O_RDWR | O_SYNC);
...
rv = mmap64(0, size, PROT_READ, MAP_SHARED, fd, pci_addr);
...
<snip>
The pci_addr is the address obtained from lspci output which is a 64 bit
address.
The pci_addr has a value of 0x121ffb000000, is that weird?
Kernel is 3.4.10 64 bit and User space is 32 bit.
regards,
Lex
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