Bug 10642

System details:
MB: PC CHIPS V21G V1.0C
CPU: VIA C7
Video (onboard): CN700
OS: FreeBSD 6.2-RELEASE
DRM: Current git copy (ala http://dri.freedesktop.org/wiki/Download)
X: X11 7.2
X11 driver: openchrome (http://www.openchrome.org/)

Problem description:
When running glxgears, I get one of the following errors:
error: [drm:pid5118:via_parse_command_stream] *ERROR* Invalid / Unimplemented DMA HEADER command. 0xec007400
error: [drm:pid5127:via_parse_command_stream] *ERROR* Invalid / Unimplemented DMA HEADER command. 0xec00741c

A quick frob suggests this is a HALCYON_CMDB command, but the drm doesn't seem to do anything with it (defined but not used). Did I massivly break something whole making DRM work on FreeBSD, or is something else up?

glxinfo:
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_OML_swap_method,
    GLX_SGI_make_current_read, GLX_SGIS_multisample, GLX_SGIX_hyperpipe,
    GLX_SGIX_swap_barrier, GLX_SGIX_fbconfig, GLX_MESA_copy_sub_buffer
client glx vendor string: SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory,
    GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control,
    GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_OML_sync_control,
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
    GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap
GLX version: 1.2
GLX extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_swap_control,
    GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_SGI_make_current_read,
    GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig
OpenGL vendor string: VIA Technology
OpenGL renderer string: Mesa DRI UniChrome 20060710 x86/MMX/SSE2
OpenGL version string: 1.2 Mesa 6.5.2
OpenGL extensions:
    GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture,
    GL_ARB_point_parameters, GL_ARB_texture_env_add,
    GL_ARB_texture_env_combine, GL_ARB_texture_mirrored_repeat,
    GL_ARB_transpose_matrix, GL_ARB_window_pos, GL_EXT_abgr, GL_EXT_bgra,
    GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract,
    GL_EXT_clip_volume_hint, GL_EXT_compiled_vertex_array, GL_EXT_convolution,
    GL_EXT_copy_texture, GL_EXT_draw_range_elements, GL_EXT_fog_coord,
    GL_EXT_histogram, GL_EXT_packed_pixels, GL_EXT_point_parameters,
    GL_EXT_polygon_offset, GL_EXT_rescale_normal, GL_EXT_secondary_color,
    GL_EXT_separate_specular_color, GL_EXT_stencil_wrap, GL_EXT_subtexture,
    GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_edge_clamp,
    GL_EXT_texture_env_add, GL_EXT_texture_env_combine,
    GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_vertex_array,
    GL_APPLE_packed_pixels, GL_IBM_rasterpos_clip,
    GL_IBM_texture_mirrored_repeat, GL_MESA_window_pos, GL_NV_blend_square,
    GL_NV_light_max_exponent, GL_NV_texgen_reflection, GL_OES_read_format,
    GL_SGI_color_matrix, GL_SGI_color_table, GL_SGIS_texture_edge_clamp,
    GL_SGIS_texture_lod

   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav
 id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------
0x22 24 tc  0 32  0 r  y  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
0x23 24 tc  0 32  0 r  .  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
0x24 24 tc  0 32  0 r  y  .  8  8  8  8  0 16  0  0  0  0  0  0 0 None
0x25 24 tc  0 32  0 r  .  .  8  8  8  8  0 16  0  0  0  0  0  0 0 None
0x26 24 tc  0 32  0 r  y  .  8  8  8  8  0  0  0  0  0  0  0  0 0 None
0x27 24 tc  0 32  0 r  .  .  8  8  8  8  0  0  0  0  0  0  0  0 0 None
0x28 24 tc  0 32  0 r  y  .  8  8  8  8  0 24  8 16 16 16 16  0 0 Slow
0x29 24 tc  0 32  0 r  .  .  8  8  8  8  0 24  8 16 16 16 16  0 0 Slow
0x2a 24 tc  0 32  0 r  y  .  8  8  8  8  0 16  0 16 16 16 16  0 0 Slow
0x2b 24 tc  0 32  0 r  .  .  8  8  8  8  0 16  0 16 16 16 16  0 0 Slow
0x2c 24 tc  0 32  0 r  y  .  8  8  8  8  0  0  0 16 16 16 16  0 0 Slow
0x2d 24 tc  0 32  0 r  .  .  8  8  8  8  0  0  0 16 16 16 16  0 0 Slow


Selected bits of Xorg.0.log:
(II) LoadModule: "dri"
(II) Loading /usr/X11R6/lib/xorg/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
(II) Loading extension XFree86-DRI
(==) VIA(0): DRI IRQ will be enabled if DRI is enabled.
(==) VIA(0): AGP DMA will be disabled if DRI is enabled.
(==) VIA(0): PCI DMA will be used for XV image transfer if DRI is enabled.
(==) VIA(0): Will not impose a limit on video-ram set aside for DRI.
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: Searching for BusID PCI:1:0:0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: drmOpenMinor returns 8
drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0
(II) VIA(0): [drm] DRM interface version 1.2
(II) VIA(0): [drm] created "via" driver at busid "PCI:1:0:0"
(II) VIA(0): [drm] added 8192 byte SAREA at 0xc22da000
(II) VIA(0): [drm] mapped SAREA 0xc22da000 to 0x2c5a3000
(II) VIA(0): [drm] framebuffer handle = 0xf4000000
(II) VIA(0): [drm] added 1 reserved context for kernel
(II) VIA(0): [dri] visual configs initialized.
(II) VIA(0): [drm] register handle = 0xfb000000
(II) VIA(0): [drm] framebuffer handle = 0xf4000000
(II) VIA(0): [drm] mmio Registers = 0xfb000000
(II) VIA(0): [dri] mmio mapped.
(EE) VIA(0): [drm] drmAgpAcquire failed 22
(II) VIA(0): [dri] use pci.
(II) VIA(0): [drm] Using 45860832 bytes for DRM memory heap.
(II) VIA(0): [dri] frame buffer initialized.
(II) VIA(0): [drm] installed DRM signal handler
(II) VIA(0): [DRI] installation complete
(II) VIA(0): [dri] kernel data initialized.
(II) VIA(0): [drm] Irq handler installed, using IRQ 16.