Re: devctl: Failed to detach pci0:1:0:0: Device busy / devctl: Failed to set pci0:1:0:0 driver to ppt: Device busy

> On 30 Jan 2023, at 05:37, Mario Marietto <marietto2008@gmail.com> wrote:
> In some FreeBSD 13.1 machines I have the problem below,in some others I don't have it. I would like to know what the causes could be and how to fix it. 
> 
> root@marietto:/usr/home/marietto # devctl detach pci0:1:0:0 
> 
> devctl: Failed to detach pci0:1:0:0: Device busy
> 
> root@marietto:/usr/home/marietto # devctl detach pci0:2:0:0 
> 
> devctl: Failed to detach pci0:2:0:0: Device busy 
> 
> Not even it works if instead of detach them, I try to attach them directly to the ppt driver :
> 
> root@marietto:/usr/home/marietto/bhyve/Files # devctl set driver pci0:2:0:0 ppt 
> devctl: Failed to set pci0:2:0:0 driver to ppt: Device busy
>  
> root@marietto:/usr/home/marietto/bhyve/Files # devctl detach pci0:2:0:0 
> devctl: Failed to detach pci0:2:0:0: Device busy
> 
> Pci addresses 1:0:0 and 2:0:0 belong to the two GPUs that I have on my PC :
> 
> vgapci0@pci0:1:0:0:     class=0x030000 rev=0xa1 hdr=0x00 vendor=0x10de device=0x1c02 subvendor=0x19da subdevice=0x2438 
> vgapci1@pci0:2:0:0:     class=0x030000 rev=0xa1 hdr=0x00 vendor=0x10de device=0x1e04 subvendor=0x19da subdevice=0x2503
> 
> Actually I have commented this line on /boot/loader.conf,because it makes no difference if I keep it uncommented or not. It is totally ignored.
> 
> #pptdevs="1/0/0 1/0/1 2/0/0 2/0/1 2/0/2 2/0/3" 

Do you have 'vmm_load="YES"' in loader.conf?

If not I am not sure it will have an effect - vmm must be loaded early otherwise the card will be grabbed by the vgapci driver rather than be put under ppt control.

> In every FreeBSD machine I load the nvidia kernel modules adding the line below to /etc/rc.conf :
> 
> kld_list="nvidia nvidia-modeset"
> 
> and I have installed the nvidia-driver package on every machine. But as I said,in some of them I see the error above,in some others I don't see it. I'm not able to isolate the dysfunctional pattern. The xorg.conf file is the same for each machine. Can someone help me to troubleshoot the error ? thanks. 

If you want to pass through the video card (as evidenced by devctl and pptdevs) then why have the nvidia driver installed?

Perhaps explain what you are trying to achieve rather than asking for help on how to sold what you think the problem is.

PS I have trimmed the CCs as that seems impolite.

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum