kernel.git/drivers/gpu/drm/i915/intel_ringbuffer.h, branch linux-3.2.y

drm/i915: Add intel_ring_cachline_align()

2014-04-01T23:58:51Z

commit 753b1ad4a281b0663329409d410243e91825c323 upstream. intel_ring_cachline_align() emits MI_NOOPs until the ring tail is aligned to a cacheline boundary. Cc: Bjoern C Cc: Alexandru DAMIAN Cc: Enrico Tagliavini Suggested-by: Chris Wilson Signed-off-by: Ville Syrjälä Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings

drm/i915: Dumb down the semaphore logic

2011-09-21T21:52:41Z

While I think the previous code is correct, it was hard to follow and hard to debug. Since we already have a ring abstraction, might as well use it to handle the semaphore updates and compares. I don't expect this code to make semaphores better or worse, but you never know... v2: Remove magic per Keith's suggestions. Ran Daniel's gem_ring_sync_loop test on this. v3: Ignored one of Keith's suggestions. v4: Removed some bloat per Daniel's recommendation. Cc: Daniel Vetter Cc: Keith Packard Signed-off-by: Ben Widawsky Signed-off-by: Keith Packard

Drivers: i915: Fix all space related issues.

2011-09-20T01:01:47Z

Various issues involved with the space character were generating warnings in the checkpatch.pl file. This patch removes most of those warnings. Signed-off-by: Akshay Joshi Signed-off-by: Keith Packard

drm/i915/ringbuffer: Idling requires waiting for the ring to be empty

2011-07-12T17:35:45Z

...which is measured by the size and not the amount of space remaining. Waiting upon size-8, did one of two things. In the common case with more than 8 bytes available to write into the ring, it would return immediately. Otherwise, it would timeout given the impossible condition of waiting for more space than is available in the ring, leading to warnings such as: [drm:intel_cleanup_ring_buffer] *ERROR* failed to quiesce render ring whilst cleaning up: -16 Signed-off-by: Chris Wilson Reviewed-by: Eric Anholt Signed-off-by: Keith Packard

drm/i915: proper use of forcewake

2011-05-10T20:56:45Z

Moved the macros around to properly do reads and writes for the given GPU. This is to address special requirements for gen6 (SNB) reads and writes. Registers in the range 0-0x40000 on gen6 platforms require special handling. Instead of relying on the callers to pick the registers correctly, move the logic into the read and write functions. Signed-off-by: Ben Widawsky Signed-off-by: Chris Wilson

drm/1915: ringbuffer wait for idle function

2011-05-10T20:56:40Z

Added a new function which waits for the ringbuffer space to be equal to (total - 8). This is the empty condition of the ringbuffer, and equivalent to head==tail. Also modified two users of this functionality elsewhere in the code. Signed-off-by: Ben Widawsky Signed-off-by: Chris Wilson

Merge branch 'drm-intel-fixes' into drm-intel-next

2011-03-07T12:35:15Z

Apply the trivial conflicting regression fixes, but keep GPU semaphores enabled. Conflicts: drivers/gpu/drm/i915/i915_drv.h drivers/gpu/drm/i915/i915_gem_execbuffer.c

drm/i915: Do not overflow the MMADDR write FIFO

2011-03-06T09:07:46Z

Whilst the GT is powered down (rc6), writes to MMADDR are placed in a FIFO by the System Agent. This is a limited resource, only 64 entries, of which 20 are reserved for Display and PCH writes, and so we must take care not to queue up too many writes. To avoid this, there is counter which we can poll to ensure there are sufficient free entries in the fifo. "Issuing a write to a full FIFO is not supported; at worst it could result in corruption or a system hang." Reported-and-Tested-by: Matt Turner Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34056 Signed-off-by: Chris Wilson

drm/i915: Refine tracepoints

2011-02-07T14:59:18Z

A lot of minor tweaks to fix the tracepoints, improve the outputting for ftrace, and to generally make the tracepoints useful again. It is a start and enough to begin identifying performance issues and gaps in our coverage. Signed-off-by: Chris Wilson

Merge branch 'drm-intel-fixes' into drm-intel-next

2011-01-24T23:45:32Z

Merge important suspend and resume regression fixes and resolve the small conflict. Conflicts: drivers/gpu/drm/i915/i915_dma.c