radeondrmkms panic

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

Hi,

I've been getting panics for quite some time from -current amd64
running on a HP EliteBook 8570w with an AMD FirePro M4000 (FireGL V)
graphics. If I disable radeondrm, the system is find and I can run it
in vesa mode without issues. The trace is as follows:

drm: initializing kernel modesetting (VERDE 0x1002:0x682D 0x103C:0x176B).
drm: register mmio base: 0xd4300000
drm: register mmio size: 262144
DRM error in radeon_det_bios: Unable to locate a BIOS ROM
: error: Fatal error during GPU init
radeon0: unable to attach drm: 22
panic: cnopen: no console device
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff80289eed cs 8 rflags 246 cr2
7f7ff6c0ccc8 ilevel 0 rsp fffffe8124f27ad8
curlwp 0xfffffe85391538c0 pid 2.1 lowest kstack 0xfffffe8124f242c0
Stopped in pid 2.1 (init) at netbsd:breakpoint+0x5: leave
db{5}> bt
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0x13c
snprintf() at netbsd:snprintf
cnclose() at netbsd:cnclose
cdev_open() at netbsd:cdev_open+0xb2
spec_open() at netbsd:spec_open+0x25d
VOP_OPEN() at netbsd:VOP_OPEN+0x33
vn_open() at netbsd:vn_open+0x1ea
do_open() at netbsd:do_open+0x111
do_sys_openat() at netbsd:do_sys_openat+0x68
sys_open() at netbsd:sys_open+0x24
syscall() at netbsd+syscall+0x9c
--- syscall (number 5) ---
7f7ff6c3c6aa:db{5}>

I have a full dump, if it is of interest.

I appreciate that the card may not be supported by the present radeon
driver, but the crash may be of interest anyway. I do not know if it
merits a PR.

Regards,

Chavdar Ivanov


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