More amd64 drmkms radeon

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

Hi,

A few days ago one of my systems running -current (updated roughly
twice a week) refused to start Xorg with a message about a missing
global; this has been fixed since and the machine is working fine with
GENERIC and radeondrm. At that moment I decided to try DRMKMS there
and got:
---
...
drm: initializing kernel modesetting (RV350 0x1002:0x4154 0x1002:0x0002).
drm: register mmio base: 0xd0000000
drm: register mmio size: 65535
DRM error in radeon_get_bios: Unable to locate a BIOS ROM
drm: Using generic clock info
radeon0: info: GTT: 256M 0xE0000000 — 0xEFFFFFFF
drm: Generation 2 PCI interface, using max accessible memory
radeon0: info: VRAM: 128M 0x00000000D8000000 — 0x00000000DFFFFFFF (128M used)
drm: Detected VRAM RAM=80M, BAR=128M
drm: RAM width 128bits DDR
Zone kernel: Available graphics memory: 1065632 kiB
drm: radeon: 128M of VRAM memory ready
drm: radeon: 256M of GTT memory ready.
drm: radeon: 1 quad pipes, 1 Z pipes initialized.
fatal protection fault in supervisor mode
trap type 4 code 0 rip ffffffff8022eb64 cs 8 rflags 10246 cr2 0 ileuel
0 rsp fffffe8045b23a50
curlwp 0xfffffe80a83a81e0 pid 0.62 lowest kstack 0xfffffe8045b202c0
kernel: protection fault trap, code=0
Stopped in pid 8.62 (system) at netbsd:bus_dmamap_load_raw+0x34= movq
$0,40(%r14)
db{1}> bt
bus_dmamap_load_raw() at netbsd bus_dmamap_load_raw+0x34
ttm_bus_dma_populate() at netbsd:ttm_bus_dma_populate+0x100
ttm_tt_bind() at netbsd:ttm_tt_bind+0x2f
ttm_bo_handle_move_mem() at netbsd:ttm_bo_handle_move_mem+0x5e2
ttm_bo_validate() at netbsd:ttm_bo_validate+0x217
ttm_bo_init() at netbsd:ttm_bo_init+0x27c
radeon_bo_create() at netbsd:radeon_bo_create+0x15d
radeon_wb_init() at netbsd:radeon_wb_init+0x13c
r300_startup() at netbsd:r300_startup+0x128
r300_init() at netbsd:r300_init+0x11f
radeon_device_init() at netbsd:radeon_device_init+0x4d7
radeon_driver_load_kms() at netbsd:radeon_driver_load_kms+0x6e
drm_dev_register() at netbsd:drm_dev_register+0x87
drm_pci_attach() at netbsd:drm_pci_attach+0x28a
radeon_attach_real() at netbsd:radeon_attach_real+0x68
config_mountroot_thread() at netbsd:config_mountroot_thread+0x2c
db{1}>

...

I understand DRMKMS is WIP, but decided it is worth the mail for the
information only.

The chipset is reported as RADEON(0): Chipset: "ATI FireGL T2 AT
(AGP)" (ChipID = 0x4154).

Regards,

Chavdar Ivanov

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