[PATCH 00/37] [RFC] revamped modeset locking
Daniel Vetter
daniel.vetter at ffwll.ch
Wed Dec 12 05:06:40 PST 2012
Hi all,
First thing first: It works, I now no longer have a few dropped frames every 10s
on my testbox here with the pageflip i-g-t tests.
Random notes:
- New design has per-crtc locks to protect the crtc input-side (pageflip,
cursor) for r/w and the output state of the crtc (mode, dpms) as read-only. It
also required completely revamped fb lifecycle management, those are now
refcounted for real (which is a nice cleanup). Imo the proposed rwsem hack
from Dave/Ajax is too ugly to life in comparison.
- Smoke tested on i915, compile tested for x86 drivers, probably all arm drivers
trivially broken. I plan add tons of i-g-t testscases to exercise all the
cornercases with i915 (so that lockdep has full coverage among other things)
and at least run radeon/nouveau a bit. I also need to set up an arm
crosscompiler. Generally testing feedback on !i915 highly welcome.
- Driver audit: I've tried to not break anything more than it already is, and
for the big three desktop drivers fixup any related breakage I've noticed. Big
unknown is vmwgfx since that driver is over my head. Generally review from
driver devs is required to check all corner-cases.
- Merging, presuming people like this idea here: I think it'd be good to slurp
in the driver changes as early as possible. The big rework probably has to go
in with a separate pull directly to drm-next for all drivers - there are
simply too many sync-points in this rework where all drivers need to follow
the new rules before core drm changes can be applied.
- Having a global lock which synchronizing object destruction is a royal pain,
since it reliably results in that locking getting in the way almost everywhere
when trying to implement refcounting. It's fixed now for fb & the mode_config
mutex, but I'm already eagerly looking forward to simplifying dev->struct_mutex
gem_bo cleanup rules.
- drm teardown/setup synchronization and locking is terminally broken. Insane
volunteers welcome, I don't want to do this.
- I've mentioned that reading too much driver code causes nightmares, right?
vmwgfx ...
Please bring on the flames.
Cheers, Daniel
Daniel Vetter (37):
drm: review locking rules in drm_crtc.c
drm/doc: integrate drm_crtc.c kerneldoc
drm: add drm_modeset_lock|unlock_all
drm/i915: rework locking for intel_dpio|sbi_read|write
drm/i915: use drm_modeset_lock_all
drm/gma500: use drm_modeset_lock_all
drm/ast: use drm_modeset_lock_all
drm/shmobile: use drm_modeset_lock_all
drm/vmgfx: use drm_modeset_lock_all
drm: add per-crtc locks
drm/radeon: add W|RREG32_IDX for MM_INDEX|DATA based mmio accesss
drm/radeon: make indirect register access concurrency-safe
drm/nouveau: protect evo_wait/evo_kick sections with a channel mutex
drm: only take the crtc lock for ->cursor_set
drm: only take the crtc lock for ->cursor_move
drm/<drivers>: reorder framebuffer init sequence
drm: revamp locking around fb creation/destruction
drm: create drm_framebuffer_lookup
drm/gma500: move fbcon restore to lastclose
drm: revamp framebuffer cleanup interfaces
drm: reference framebuffers which are on the idr
drm: nest modeset locks within fpriv->fbs_lock
drm/i915: fixup overlay stolen memory leak
drm: push modeset_lock_all into ->fb_create driver callbacks
drm: don't take modeset locks in getfb ioctl
drm: fb refcounting for dirtyfb_ioctl
drm: refcounting for sprite framebuffers
drm: encapsulate crtc->set_config calls
drm: refcounting for crtc framebuffers
drm/i915: dump refcount into framebuffer debugfs file
drm/vmwgfx: add proper framebuffer refcounting
drm: optimize drm_framebuffer_remove
drm/nouveau: try to protect nbo->pin_refcount
drm/ttm: fix fence locking in ttm_buffer_object_transfer
drm/radeon: fix fence locking in the pageflip callback
drm: only grab the crtc lock for pageflips
drm: don't hold crtc mutexes for connector ->detect callbacks
Documentation/DocBook/drm.tmpl | 4 +
drivers/gpu/drm/ast/ast_drv.c | 4 +-
drivers/gpu/drm/ast/ast_drv.h | 2 +
drivers/gpu/drm/ast/ast_fb.c | 1 +
drivers/gpu/drm/ast/ast_main.c | 6 +-
drivers/gpu/drm/cirrus/cirrus_fbdev.c | 1 +
drivers/gpu/drm/cirrus/cirrus_main.c | 11 +-
drivers/gpu/drm/drm_crtc.c | 782 +++++++++++++++++------------
drivers/gpu/drm/drm_fb_cma_helper.c | 15 +-
drivers/gpu/drm/drm_fb_helper.c | 26 +-
drivers/gpu/drm/drm_fops.c | 1 +
drivers/gpu/drm/exynos/exynos_drm_fb.c | 20 +-
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 4 +-
drivers/gpu/drm/gma500/framebuffer.c | 29 +-
drivers/gpu/drm/gma500/psb_drv.c | 15 +-
drivers/gpu/drm/i2c/ch7006_drv.c | 2 +-
drivers/gpu/drm/i915/i915_debugfs.c | 19 +-
drivers/gpu/drm/i915/i915_dma.c | 4 +-
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_display.c | 74 ++-
drivers/gpu/drm/i915/intel_dp.c | 2 +
drivers/gpu/drm/i915/intel_fb.c | 5 +-
drivers/gpu/drm/i915/intel_lvds.c | 4 +-
drivers/gpu/drm/i915/intel_overlay.c | 14 +-
drivers/gpu/drm/i915/intel_sprite.c | 8 +-
drivers/gpu/drm/mgag200/mgag200_fb.c | 1 +
drivers/gpu/drm/mgag200/mgag200_main.c | 10 +-
drivers/gpu/drm/nouveau/nouveau_bo.c | 22 +-
drivers/gpu/drm/nouveau/nouveau_bo.h | 2 +
drivers/gpu/drm/nouveau/nouveau_display.c | 10 +-
drivers/gpu/drm/nouveau/nouveau_fbcon.c | 1 +
drivers/gpu/drm/nouveau/nv04_display.c | 2 +-
drivers/gpu/drm/nouveau/nv17_tv.c | 2 +-
drivers/gpu/drm/nouveau/nv50_display.c | 8 +
drivers/gpu/drm/radeon/r100.c | 23 +-
drivers/gpu/drm/radeon/radeon.h | 18 +-
drivers/gpu/drm/radeon/radeon_combios.c | 6 +-
drivers/gpu/drm/radeon/radeon_cp.c | 14 -
drivers/gpu/drm/radeon/radeon_cursor.c | 25 +-
drivers/gpu/drm/radeon/radeon_device.c | 1 +
drivers/gpu/drm/radeon/radeon_display.c | 6 +-
drivers/gpu/drm/radeon/radeon_drv.h | 1 -
drivers/gpu/drm/radeon/radeon_fb.c | 2 +
drivers/gpu/drm/shmobile/shmob_drm_drv.c | 4 +-
drivers/gpu/drm/ttm/ttm_bo_util.c | 2 +
drivers/gpu/drm/udl/udl_fb.c | 12 +-
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c | 38 +-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 73 ++-
drivers/staging/omapdrm/omap_debugfs.c | 2 +
drivers/staging/omapdrm/omap_fb.c | 16 +-
drivers/staging/omapdrm/omap_fbdev.c | 8 +-
include/drm/drmP.h | 13 +
include/drm/drm_crtc.h | 30 ++
54 files changed, 843 insertions(+), 566 deletions(-)
--
1.7.10.4
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