Linux PCI driver.
Hey Guys
Im writing a PCI driver in Linux ( Lubuntu ). Now its not an entire driver its really just a little program that will latch onto a space of ram and dump the entire content of the ram into a file.
I have done this before in a Unix/Linux based OS and it took me quite a while to figure it out.
So at startup the configuration for the PCI is already done so I wont have to do any of that myself.
I really just need to set a pointer to a register.
My problem is that I cant find the functions to do that for linux. I cant find similar functions to things like :PCI_ATTACH()pci_attach_device();mmap_device_memory();
I think that is really all I need at the moment. Anybody have some ideas of where I can start looking?
Thanks and regards.
Quoted 12 lines · testlaster
Hey Guys
Im writing a PCI driver in Linux ( Lubuntu ). Now its not an entire driver its really just a little program that will latch onto a space of ram and dump the entire content of the ram into a file.
I have done this before in a Unix/Linux based OS and it took me quite a while to figure it out.So at startup the configuration for the PCI is already done so I wont have to do any of that myself.
I really just need to set a pointer to a register.
Quoted 8 lines
My problem is that I cant find the functions to do that for linux. I cant find similar functions to things like :
PCI_ATTACH()pci_attach_device();mmap_device_memory();I think that is really all I need at the moment. Anybody have some ideas of where I can start looking?
Have you read the book, Linux Device Drivers, 3rd edition, it's free online and has a whole chapter on PCI that should answer these questions for you.
If not, please feel free to post your code and we will be glad to review it.
thanks,
greg k-h
Hi Greg
Yes I have read the book and some of it does make sense to me.
What doesnt make sense though is that my pci.h file that I have found /include/linux only has like 30 lines max?
None of the functions in the book are in the header.
Thanks
Testo
Quoted 31 lines · Greg KH
Quoted 12 lines · testlaster
Hey Guys
Im writing a PCI driver in Linux ( Lubuntu ). Now its not an entire driver its really just a little program that will latch onto a space of ram and dump the entire content of the ram into a file.
I have done this before in a Unix/Linux based OS and it took me quite a while to figure it out.So at startup the configuration for the PCI is already done so I wont have to do any of that myself.
I really just need to set a pointer to a register.Quoted 8 lines
My problem is that I cant find the functions to do that for linux. I cant find similar functions to things like :
PCI_ATTACH()pci_attach_device();mmap_device_memory();I think that is really all I need at the moment. Anybody have some ideas of where I can start looking?
Have you read the book, Linux Device Drivers, 3rd edition, it's free online and has a whole chapter on PCI that should answer these questions for you.
If not, please feel free to post your code and we will be glad to review it.
thanks,
greg k-h
Quoted 6 lines · testlaster
Hi Greg
Yes I have read the book and some of it does make sense to me.
What doesnt make sense though is that my
pci.hfile that I have found /include/linux only has like 30 lines max?
$ wc include/linux/pci.h 1832 7982 65670 include/linux/pci.h
are you sure you are looking at the kernel source tree?
Quoted 1 line
None of the functions in the book are in the header.
Then I don't think you are looking at kernel source, but perhaps the header file for libpci in userspace?
good luck,
greg k-h
I think you are right Greg
I eventually after looking for alternative header folders I found one here that seems to be more in the line of what I am looking for .
/usr/src/linux-header-3.13.0-32-generic/include/linux/pc.h .
This should work right?
Quoted 24 lines · Greg KH
Quoted 6 lines · testlaster
Hi Greg
Yes I have read the book and some of it does make sense to me.
What doesnt make sense though is that my
pci.hfile that I have found /include/linux only has like 30 lines max?$ wc include/linux/pci.h 1832 7982 65670 include/linux/pci.hare you sure you are looking at the kernel source tree?
Quoted 1 line
None of the functions in the book are in the header.
Then I don't think you are looking at kernel source, but perhaps the header file for libpci in userspace?
good luck,
greg k-h
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