* Re: uio_pci_generic driver [not found] ` <20120320180030.GB808@redhat.com> @ 2012-03-20 18:48 ` tochansky 2012-03-20 20:17 ` Hans J. Koch 0 siblings, 1 reply; 3+ messages in thread From: tochansky @ 2012-03-20 18:48 UTC (permalink / raw) To: Michael S. Tsirkin; +Cc: linux-kernel > On Tue, Mar 20, 2012 at 09:56:03PM +0400, tochansky@tochlab.net wrote: >> Hello! >> I have a question about uio_pci_generic driver. I'm trying to use it in >> my >> project, but have no luck. >> There are very little information on the subject. If you have a few >> minutes, I would like to ask a few questions. >> I need to mmap() memory of my board to work with it. I did >> # modprobe uio_pci_generic >> # echo "xxxx xxxx" > /sys/bus/pci/drivers/uio_pci_generic/new_id >> >> Files in /sys/class/uio/uio0 appears, but there no directory named >> /sys/class/uio/uio0/maps/. >> Anyway I tryed to mmap with code: >> >> #include <sys/types.h> >> #include <sys/stat.h> >> #include <fcntl.h> >> >> #include <sys/mman.h> >> #include <stdio.h> >> >> int main() >> { >> int fd = open("/dev/uio0", O_RDWR | O_SYNC); >> printf("fd = %d\n", fd); >> void *addr = mmap(NULL, 1024, PROT_READ, MAP_SHARED, fd, 0); >> printf("addr = %p\n", addr); >> } >> >> Ofcourse, mmap() failes with error "Invalid argument". Nothing criminal >> in >> dmesg and any other hints of error. >> >> -- >> Dmitriy > > > Map memory through /sys/bus/pci/devices/...... > > Also copy questions to mailing lists please. > Thanks, it works now. #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/mman.h> #include <stdio.h> int main() { int fd = open("/sys/class/pci_bus/0000:03/device/0000:03:00.0/resource5", O_RDWR | O_SYNC); printf("fd = %d\n", fd); void *addr = mmap(NULL, 512, PROT_READ, MAP_SHARED, fd, 0); if(addr == MAP_FAILED) { perror("mmap"); } else { printf("addr = %p\n", addr); } } May be its time to add some hints in documentation? :-) ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: uio_pci_generic driver 2012-03-20 18:48 ` uio_pci_generic driver tochansky @ 2012-03-20 20:17 ` Hans J. Koch 2012-03-20 20:34 ` Michael S. Tsirkin 0 siblings, 1 reply; 3+ messages in thread From: Hans J. Koch @ 2012-03-20 20:17 UTC (permalink / raw) To: tochansky; +Cc: Michael S. Tsirkin, linux-kernel On Tue, Mar 20, 2012 at 10:48:25PM +0400, tochansky@tochlab.net wrote: > > On Tue, Mar 20, 2012 at 09:56:03PM +0400, tochansky@tochlab.net wrote: > >> Hello! > >> I have a question about uio_pci_generic driver. I'm trying to use it in > >> my > >> project, but have no luck. > >> There are very little information on the subject. If you have a few > >> minutes, I would like to ask a few questions. > >> I need to mmap() memory of my board to work with it. I did > >> # modprobe uio_pci_generic > >> # echo "xxxx xxxx" > /sys/bus/pci/drivers/uio_pci_generic/new_id > >> > >> Files in /sys/class/uio/uio0 appears, but there no directory named > >> /sys/class/uio/uio0/maps/. > >> Anyway I tryed to mmap with code: > >> > >> #include <sys/types.h> > >> #include <sys/stat.h> > >> #include <fcntl.h> > >> > >> #include <sys/mman.h> > >> #include <stdio.h> > >> > >> int main() > >> { > >> int fd = open("/dev/uio0", O_RDWR | O_SYNC); > >> printf("fd = %d\n", fd); > >> void *addr = mmap(NULL, 1024, PROT_READ, MAP_SHARED, fd, 0); > >> printf("addr = %p\n", addr); > >> } > >> > >> Ofcourse, mmap() failes with error "Invalid argument". Nothing criminal > >> in > >> dmesg and any other hints of error. > >> > >> -- > >> Dmitriy > > > > > > Map memory through /sys/bus/pci/devices/...... > > > > Also copy questions to mailing lists please. > > > Thanks, it works now. > > #include <sys/types.h> > #include <sys/stat.h> > #include <fcntl.h> > > #include <sys/mman.h> > #include <stdio.h> > > int main() { > int fd = > open("/sys/class/pci_bus/0000:03/device/0000:03:00.0/resource5", > O_RDWR | O_SYNC); > printf("fd = %d\n", fd); > void *addr = mmap(NULL, 512, PROT_READ, MAP_SHARED, fd, 0); > if(addr == MAP_FAILED) { > perror("mmap"); > } > else { > printf("addr = %p\n", addr); > } > } > > May be its time to add some hints in documentation? :-) Good idea. Michael, are you in the mood to hack something up for Documentation/DocBook/uio-howto.tmpl ? Thanks, Hans ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: uio_pci_generic driver 2012-03-20 20:17 ` Hans J. Koch @ 2012-03-20 20:34 ` Michael S. Tsirkin 0 siblings, 0 replies; 3+ messages in thread From: Michael S. Tsirkin @ 2012-03-20 20:34 UTC (permalink / raw) To: Hans J. Koch; +Cc: tochansky, linux-kernel On Tue, Mar 20, 2012 at 09:17:00PM +0100, Hans J. Koch wrote: > On Tue, Mar 20, 2012 at 10:48:25PM +0400, tochansky@tochlab.net wrote: > > > On Tue, Mar 20, 2012 at 09:56:03PM +0400, tochansky@tochlab.net wrote: > > >> Hello! > > >> I have a question about uio_pci_generic driver. I'm trying to use it in > > >> my > > >> project, but have no luck. > > >> There are very little information on the subject. If you have a few > > >> minutes, I would like to ask a few questions. > > >> I need to mmap() memory of my board to work with it. I did > > >> # modprobe uio_pci_generic > > >> # echo "xxxx xxxx" > /sys/bus/pci/drivers/uio_pci_generic/new_id > > >> > > >> Files in /sys/class/uio/uio0 appears, but there no directory named > > >> /sys/class/uio/uio0/maps/. > > >> Anyway I tryed to mmap with code: > > >> > > >> #include <sys/types.h> > > >> #include <sys/stat.h> > > >> #include <fcntl.h> > > >> > > >> #include <sys/mman.h> > > >> #include <stdio.h> > > >> > > >> int main() > > >> { > > >> int fd = open("/dev/uio0", O_RDWR | O_SYNC); > > >> printf("fd = %d\n", fd); > > >> void *addr = mmap(NULL, 1024, PROT_READ, MAP_SHARED, fd, 0); > > >> printf("addr = %p\n", addr); > > >> } > > >> > > >> Ofcourse, mmap() failes with error "Invalid argument". Nothing criminal > > >> in > > >> dmesg and any other hints of error. > > >> > > >> -- > > >> Dmitriy > > > > > > > > > Map memory through /sys/bus/pci/devices/...... > > > > > > Also copy questions to mailing lists please. > > > > > Thanks, it works now. > > > > #include <sys/types.h> > > #include <sys/stat.h> > > #include <fcntl.h> > > > > #include <sys/mman.h> > > #include <stdio.h> > > > > int main() { > > int fd = > > open("/sys/class/pci_bus/0000:03/device/0000:03:00.0/resource5", > > O_RDWR | O_SYNC); > > printf("fd = %d\n", fd); > > void *addr = mmap(NULL, 512, PROT_READ, MAP_SHARED, fd, 0); > > if(addr == MAP_FAILED) { > > perror("mmap"); > > } > > else { > > printf("addr = %p\n", addr); > > } > > } > > > > May be its time to add some hints in documentation? :-) > > Good idea. Michael, are you in the mood to hack something up for > Documentation/DocBook/uio-howto.tmpl ? > > Thanks, > Hans I'll see what can be done. ^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] ` <20120320180030.GB808@redhat.com>
2012-03-20 18:48 ` uio_pci_generic driver tochansky
2012-03-20 20:17 ` Hans J. Koch
2012-03-20 20:34 ` Michael S. Tsirkin
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