Hi Martyn,
Thanks for your reply. I have pasted the code below. It is very much
similar to your test code from the forum.
Thanks!
#define _XOPEN_SOURCE 500
#define u32 unsigned int
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "vme_user.h"
int main(int argc, char *argv[])
{
int fd;
int i;
int retval;
int readSize = 2;
unsigned char data[readSize];
struct vme_master master;
printf("Simple VME User Module Test\n");
fd = open("/dev/bus/vme/m0", O_RDONLY);
if (fd == -1) {
perror("ERROR: Opening window device file");
return 1;
}
printf ("opened the file\n");
master.enable = 1;
// master.vme_addr = 0x114000;
master.vme_addr = 0x114000;
master.size = 0x10000;
master.aspace = 0x2; // VME_A24
master.cycle = 0x2000 | 0x8000;// user/data access
master.dwidth = 0x2; // 16 bit word access
retval = ioctl(fd, VME_SET_MASTER, &master);
if (retval != 0) {
printf("retval=%d\n", retval);
perror("ERROR: Failed to configure window");
return 1;
}
printf ("set the master\n");
/*
* Reading first 512 bytes
*/
for (i=0; i<readSize; i++) {
data[i] = 0;
}
retval = pread(fd, data, readSize, 0x03c);
if (retval < readSize) {
printf("WARNING: Only read %d bytes", retval);
}
for(i=0; i<retval; i++) {
if (i % 8 == 0) {
printf("\n""%4.4x: ", i);
}
printf("%2.2x ", data[i]);
}
printf("\n");
close(fd);
return 0;
}
On Mon, Nov 10, 2014 at 4:07 AM, Welch, Martyn (GE Intelligent
Platforms) <martyn.welch@xxxxxx> wrote:
> Hi Maurice,
>
> Would you be able to point to a complete piece of test code that exhibits this failure?
>
> Martyn Welch
> Lead Software Engineer
> GE Intelligent Platforms
> Embedded Systems
>
> T +44 (0) 1327 322748
> F +44 (0) 1327 322817
> E martyn.welch@xxxxxx
>
> Tove Valley Business Park
> Towcester, Northants, NN12 6PF, United Kingdom
> GE Intelligent Platforms Ltd
>
> GE imagination at work
>
> GE Intelligent Platforms Ltd, registered in England and Wales (3828642) at 100 Barbirolli Square, Manchester, M2 3AB, VAT GB 927 5591 89
>
>
>> -----Original Message-----
>> From: Maurice Moss [mailto:eightplusclub@xxxxxxxxx]
>> Sent: 08 November 2014 00:33
>> To: Welch, Martyn (GE Intelligent Platforms)
>> Cc: Manohar Vanga; dan.carpenter@xxxxxxxxxx; driverdev-
>> devel@xxxxxxxxxxxxxxxxxxxxxx
>> Subject: Re: XVME 6300 with TSI148 bridge on 64 bit Debian (Linux 3.2.57)
>> vme_user issue
>>
>> Hi Manohar/Dan,
>>
>> Any idea regarding this?
>>
>> Cheers,
>> Maurice
>>
>> On Mon, Nov 3, 2014 at 5:25 PM, Maurice Moss <eightplusclub@xxxxxxxxx>
>> wrote:
>> > Hi Martyn,
>> >
>> > Thanks for your help from previous emails. I managed to talk to my
>> > board using a VME-USB board. Now I am back to working with an SBC, and
>> > I have a different setup this time around, let me describe it:
>> >
>> > 1. SBC in slot 0 of a VME64 chassis (with 2 slots), and the bottom one
>> > being a slot for an SBC. The SBC is has a Universe-II and when I load
>> > the kernel module manually, everything seems fine, and I see this in
>> > dmesg:
>> > [ 76.192738] vme_ca91cx42 0000:02:04.0: enabling device (0140 -> 0143)
>> > [ 76.192893] vme_ca91cx42 0000:02:04.0: Board is the VME system
>> controller
>> > [ 76.192902] vme_ca91cx42 0000:02:04.0: Slot ID is 0
>> > [ 76.192907] vme_ca91cx42 0000:02:04.0: CR/CSR Offset: 0
>> > [ 76.192911] vme_ca91cx42 0000:02:04.0: Slot number is unset, not
>> > configuring CR/CSR space
>> > [ 76.195956] vme_ca91cx42 0000:02:04.0: CR/CSR configuration failed.
>> >
>> > I don't intend to use CR/CSR feature. The linux kernel I am running
>> > is 3.13, the board is essentially this:
>> > http://www.onestopsystems.com/documents/OSS-PCIe-KIT-6400.pdf
>> >
>> > 2. Now I would like to talk to a passive Slave board in slot 1 (I am
>> > not sure about this numbering, basically the board in the other slot).
>> > This slave board essentially talks only A24 and D16 in
>> > user/super/data. It's address space internally begins at 0x114000. In
>> > my test code, I essentially have the following:
>> >
>> > master.enable = 1;
>> > // master.vme_addr = 0x114000;
>> > master.vme_addr = 0x114000;
>> > master.size = 0x10000;
>> > master.aspace = 0x2; // VME_A24
>> > master.cycle = 0x2000 | 0x8000;// user/data access
>> > master.dwidth = 0x2; // 16 bit word access
>> > retval = ioctl(fd, VME_SET_MASTER, &master);
>> >
>> > The call doesn't fail, and when I make a pread, all I get are 0xff s
>> > on every byte.
>> > I feel like I just can't seem to get the vme_addr to point in the
>> > right direction. I know it's not the slave board, as I have verified
>> > that it works with the VME-to-USB.
>> >
>> > In my mind, I have to set the SBC as a VME master and make a read at
>> > A24 address. However, in vme_user.c I notice that the master resource
>> > is allocated as A32. Which is why I just can't seem to get the whole
>> > addressing schema right!
>> >
>> > Here is my lspci -v
>> >
>> > 02:04.0 Bridge: Tundra Semiconductor Corp. CA91C042 [Universe] (rev 02)
>> > Flags: medium devsel, IRQ 16
>> > Memory at f7d00000 (32-bit, non-prefetchable) [size=4K]
>> > I/O ports at e000 [size=4K]
>> > Kernel driver in use: vme_ca91cx42
>> > 08:00.0 PCI bridge: Tundra Semiconductor Corp. Device 8113 (rev 01)
>> > (prog-if 01 [Subtractive decode])
>> > Flags: bus master, fast devsel, latency 0
>> > Bus: primary=08, secondary=09, subordinate=09, sec-latency=64
>> > Memory behind bridge: f7000000-f78fffff
>> > Prefetchable memory behind bridge: 00000000f6000000-
>> 00000000f6ffffff
>> > Capabilities: <access denied>
>> >
>> > Any help is as usual thoroughly appreciated. And in addition thanks
>> > for all your help already!
>> >
>> > Cheers,
>> > Maurice
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Jul 24, 2014 at 1:45 AM, Martyn Welch <martyn.welch@xxxxxx>
>> wrote:
>> >> On 23/07/14 03:09, Maurice Moss wrote:
>> >>>
>> >>> Hi Martyn,
>> >>>
>> >>> Thanks for your patience with me. I have a couple of questions for you:
>> >>>
>> >>> 0. I put the SBC with the right settings for Geographical addressing.
>> >>> I did 2 tests by setting the board in each of the 2 slots available
>> >>> on my rack and the geo address was detected as 0 in both the cases.
>> >>> This means my backplane isn't working or that my SBC isn't talking
>> >>> to the backplane.
>> >>
>> >>
>> >> What settings did you apply to "set" geographical addressing? Is this
>> >> the drivers or something board specific?
>> >>
>> >>> 1. Is there a way I can test whether the PCI bridge is working?
>> >>
>> >>
>> >> I assume you mean whether the PCI bridges are passing the PCI address
>> >> ranges used by the VME windows through to the device?
>> >>
>> >> It think "lspci -v" will show you what ranges the bridges have, you
>> >> will probably need to stick some debug into vme_tsi148.c to get the
>> >> pci_base address as allocated in tsi148_master_set().
>> >>
>> >> This can be very board dependant, so I'm afraid I can't help much here.
>> >>
>> >>> 2. I don't understand what should be the exact vme base address of
>> >>> my slave board. I am now using VDIS8004 set in slot 2,
>> >>> (http://www.ifh.de/~wischnew/amanda/daq/ces_8004_v10_.pdf) set
>> to
>> >>> VME short A16 (The static rotatory switches set to 2 and 2). Based
>> >>> on this my address would be 0x2200? Any clarification or pointing
>> >>> me in the right direction would be sincerely appreciated :-/
>> >>
>> >>
>> >> There are limitations to the granularity of windows bases and
>> >> lengths. This is especially acute when using the A16 address space.
>> >>
>> >> To debug this, try mapping the entirety of the A16 address space
>> >> using master_set. Then when calling read, read from offset 0x2200.
>> >>
>> >>> 3. When I do reads with what I believe is the correct address, I get
>> >>> back '0xff' characters all the time, and if I do it frequently
>> >>> enough I manage to crash the computer (with no logs on the dmesg,
>> >>> and reboot needed with a forced fsck). I am now trying to probe the
>> >>> kernel module adding print statements, and trying to build it out of tree.
>> >>>
>> >>
>> >> There was a bug when err_chk was set a while back, if you are running
>> >> an older kernel you may be hitting that. It stores errors, but in
>> >> some situations doesn't read them and clear them in time leading to
>> >> memory exhaustion...
>> >>
>> >>
>> >>> Cheers,
>> >>> Maurice
>> >>>
>> >>> PS: Here is what I get when I do an 'lspci -v':
>> >>>
>> >>> 03:00.0 PCI bridge: PLX Technology, Inc. PEX 8114 PCI
>> >>> Express-to-PCI/PCI-X Bridge (rev bd) (prog-if 00 [Normal decode])
>> >>> Physical Slot: 0
>> >>> Flags: bus master, fast devsel, latency 0
>> >>> Memory at d4000000 (32-bit, non-prefetchable) [size=8K]
>> >>> Bus: primary=03, secondary=04, subordinate=04, sec-latency=64
>> >>> Memory behind bridge: d0000000-d3ffffff
>> >>> Capabilities: <access denied>
>> >>>
>> >>> 04:04.0 Bridge: Tundra Semiconductor Corp. Tsi148 [Tempe] (rev 01)
>> >>> Subsystem: Tundra Semiconductor Corp. Device 0000
>> >>> Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 16
>> >>> Memory at d0000000 (64-bit, non-prefetchable) [size=4K]
>> >>> Capabilities: <access denied>
>> >>> Kernel driver in use: vme_tsi148
>> >>>
>> >>
>> >> The reads don't occur through the PCI bars (nasty), so you will need
>> >> to find out what PCI addresses the windows are being mapped to and
>> >> confirm they are in the d0000000-d3ffffff window. Without knowing
>> >> much more about your system (and I don't think you've even told me
>> >> what SBC you are using) there's a limit to how much I can help I'm afraid.
>> >>
>> >> Hope that helps,
>> >>
>> >> Martyn
>> >>
>> >>
>> >>> On Wed, Jul 16, 2014 at 12:47 AM, Martyn Welch
>> <martyn.welch@xxxxxx>
>> >>> wrote:
>> >>>>
>> >>>>
>> >>>>
>> >>>> On 14/07/14 19:29, Maurice Moss wrote:
>> >>>>>
>> >>>>>
>> >>>>> Hi all,
>> >>>>>
>> >>>>> I have updated my Linux Kernel to the latest. I am on Debian
>> >>>>> 64bit 3.15.5. I issue the following Kernel command line, and the
>> >>>>> vme_user module seems to load correctly, however the vme bus is
>> >>>>> neither mounted on /dev nor /proc.
>> >>>>>
>> >>>>
>> >>>> Just to make sure, you're looking under /dev/bus/vme?
>> >>>>
>> >>>>
>> >>>>> I was earlier using a 3.2 debian 32bit and managed to mount the
>> >>>>> vme bus by following the exact same procedure of rebuilding the
>> >>>>> kernel with vme_user module. Any help is appreciated. Here is
>> >>>>> what I see on dmesg.
>> >>>>>
>> >>>>> [ 0.000000] Kernel command line:
>> >>>>> BOOT_IMAGE=/boot/vmlinuz-3.15.5-vme
>> >>>>> root=UUID=4cdc2e84-9fbc-471c-9eb4-fde8f0b1ce96 ro
>> vme_user.bus=0
>> >>>>> vme_tsi148.err_chk=1 quiet
>> >>>>> [ 1.754278] vme_user: VME User Space Access Driver
>> >>>>> [ 1.754695] vme_tsi148 0000:04:04.0: Board is the VME system
>> >>>>> controller
>> >>>>> [ 1.754700] vme_tsi148 0000:04:04.0: VME geographical address is 0
>> >>>>> [ 1.754704] vme_tsi148 0000:04:04.0: VME Write and flush and error
>> >>>>> check is enabled
>> >>>>> [ 1.754942] vme_tsi148 0000:04:04.0: CR/CSR Offset: 0
>> >>>>> [ 1.754948] vme_tsi148 0000:04:04.0: Enabling CR/CSR space
>> >>>>>
>> >>>>> Cheers!
>> >>>>>
>> >>>>
>> >>>> It's unfortunately going to take me a while to get everything
>> >>>> together to take a look, some of my old installs I've been eeking
>> >>>> along for a while to do adhoc VME tests are now broken :-(
>> >>>>
>> >>>> Martyn
>> >>>>
>> >>>>
>> >>>>> On Thu, Jul 3, 2014 at 8:18 AM, Maurice Moss
>> >>>>> <eightplusclub@xxxxxxxxx>
>> >>>>> wrote:
>> >>>>>>
>> >>>>>>
>> >>>>>> Martyn,
>> >>>>>>
>> >>>>>> OK. I feel like I am not clear. The kernel command line has a
>> >>>>>> space, but the line here in the email doesn't (I don't know how
>> >>>>>> that happened). I am still stuck with the same issue.
>> >>>>>>
>> >>>>>> Sorry for all the confusion
>> >>>>>>
>> >>>>>>
>> >>>>>> On Thu, Jul 3, 2014 at 8:15 AM, Maurice Moss
>> >>>>>> <eightplusclub@xxxxxxxxx>
>> >>>>>> wrote:
>> >>>>>>>
>> >>>>>>>
>> >>>>>>> Yes, copy and paste issue, I had double checked that right after
>> >>>>>>> I sent you the mail. Sorry!!
>> >>>>>>>
>> >>>>>>> On Thu, Jul 3, 2014 at 3:47 AM, Martyn Welch
>> >>>>>>> <martyn.welch@xxxxxx>
>> >>>>>>> wrote:
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>> On 03/07/14 00:47, Maurice Moss wrote:
>> >>>>>>>>>
>> >>>>>>>>>
>> >>>>>>>>>
>> >>>>>>>>> I upgraded to linux kernel 3.14.9 (on Fedora). Re-compiled
>> >>>>>>>>> the kernel with the vme support etc. I now get the below in
>> >>>>>>>>> my log, and don't see any vme related files in /dev !!
>> >>>>>>>>>
>> >>>>>>>>> [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-
>> 3.14.9
>> >>>>>>>>> root=UUID=aee6e594-4be8-46d4-abe6-7c054ef239b0 ro
>> >>>>>>>>> vconsole.font=latarcyrheb-sun16
>> >>>>>>>>> vme_user.bus=0vme_tsi148.err_chk=1
>> >>>>>>>>> rhgb quiet
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>> Unless this is a copy and paste issue, you seem to be missing a
>> >>>>>>>> space between "vme_user.bus=0" and "vme_tsi148.err_chk=1".
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>> Martyn
>> >>>>>>>>
>> >>>>>>>> --
>> >>>>>>>> Martyn Welch (Lead Software Engineer) | Registered in England
>> >>>>>>>> and Wales
>> >>>>>>>> GE Intelligent Platforms | (3828642) at 100 Barbirolli
>> >>>>>>>> Square
>> >>>>>>>> T +44(0)1327322748 | Manchester, M2 3AB
>> >>>>>>>> E martyn.welch@xxxxxx | VAT:GB 927559189
>> >>>>
>> >>>>
>> >>>>
>> >>>> --
>> >>>> Martyn Welch (Lead Software Engineer) | Registered in England and
>> Wales
>> >>>> GE Intelligent Platforms | (3828642) at 100 Barbirolli
>> >>>> Square
>> >>>> T +44(0)1327322748 | Manchester, M2 3AB
>> >>>> E martyn.welch@xxxxxx | VAT:GB 927559189
>> >>
>> >>
>> >> --
>> >> Martyn Welch (Lead Software Engineer) | Registered in England and
>> Wales
>> >> GE Intelligent Platforms | (3828642) at 100 Barbirolli Square
>> >> T +44(0)1327322748 | Manchester, M2 3AB
>> >> E martyn.welch@xxxxxx | VAT:GB 927559189
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