Hi David,
Thanks for the quick reply. One more thing, in the end I have to memory map
a DMA buffer allocated using pci_alloc_consisten() function to user space.
*> I think you should be leaving the mapping to the core VM routines.*
*> Furthermore, I don't think *you* should be calling remap_pfn_r
Ravi Gupta wrote:
> My device gets memory map successfully but when I tried to read from it
> I get garbage value. Is there something that I am missing?
For starters, you really should allocate a page for your buffer rather than
using kernel static data. mmap() allows access to page-aligned dat
Hi,
I am new to linux device driver development and I'm trying to learn the
memory mapping. Currently I have written a simple device driver(major number
251 and minor number 0) and in its mmap(struct file *file, struct
vm_area_struct *vma) function, I am trying to memory map a global character
arr
