- 18 Jul, 2012 8 commits
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Alex Deucher authored
Adds documentation to most of the functions in radeon_device.c v2: split out general descriptions as per Christian's comments. Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Reviewed-by:
Christian König <christian.koenig@amd.com>
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Alex Deucher authored
Signed-off-by:
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Alex Deucher authored
Add support for using memory buffers rather than scratch registers. Some rings may not be able to write to scratch registers. Signed-off-by:
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Alex Deucher authored
Just store the index in the ring structure. Idea taken from one of Jerome's wip rptr patches. Signed-off-by:
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Alex Deucher authored
When submitting a CONST_IB, emit a SWITCH_BUFFER packet before the CONST_IB. This isn't strictly necessary (the driver will work fine without it), but is good practice and allows for more flexible DE/CE sychronization options in the future. Current userspace drivers do not take advantage of the CE yet. v2: - clean up code flow a bit - no need to flush caches for CONST IB Signed-off-by: -
Christian König authored
Const IBs are executed on the CE not the CP, so we can't fence them in the normal way. So submit them directly before the IB instead, just as the documentation says. v2: keep the extra documentation Signed-off-by:
Christian König <deathsimple@vodafone.de> Reviewed-by:
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Christian König authored
Otherwise we can encounter out of memory situations under extreme load. v2: add documentation for the new function Signed-off-by:
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Christian König authored
Otherwise the sa managers out of memory handling doesn't work. Signed-off-by:
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- 17 Jul, 2012 17 commits
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Laurent Pinchart authored
DRM_IOCTL_MODESET_CTL must only be used for UMS drivers. Make it a no-op for KMS drivers. Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by:
Michel Dänzer <michel@daenzer.net> Signed-off-by:
Dave Airlie <airlied@gmail.com>
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git://people.freedesktop.org/~deathsimple/linuxDave Airlie authored
This merges Christian work that has been hanging around on the list.
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Christian König authored
Try to save whatever is on the rings when we encounter an lockup. v2: Fix spelling error. Free saved ring data if reset fails. Add documentation for the new functions. v3: Some more spelling fixes v4: It doesn't make sense to save anything if all fences are signaled Signed-off-by:Michel Dänzer <michel.daenzer@amd.com> Reviewed-by:
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Christian König authored
Before emitting any indirect buffer, emit the offset of the next valid ring content if any. This allow code that want to resume ring to resume ring right after ib that caused GPU lockup. v2: use scratch registers instead of storing it into memory v3: skip over the surface sync for ni and si as well v4: use SET_CONFIG_REG instead of PACKET0 Signed-off-by:
Jerome Glisse <jglisse@redhat.com> Signed-off-by:
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Christian König authored
Making it easier to control when it is executed. Signed-off-by:
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Christian König authored
Just restore the page table instead. Addressing three problem with this change: 1. Calling vm_manager_suspend in the suspend path is problematic cause it wants to wait for the VM use to end, which in case of a lockup never happens. 2. In case of a locked up memory controller unbinding the VM seems to make it even more unstable, creating an unrecoverable lockup in the end. 3. If we want to backup/restore the leftover ring content we must not unbind VMs in between. Signed-off-by:
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Christian König authored
Just reinitialize the shader content on resume instead. Signed-off-by:
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Christian König authored
The IB pool is in gart memory, so it is completely superfluous to unpin / repin it on suspend / resume. Signed-off-by:
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Christian König authored
It's not critical, but the current code isn't 100% correct. Signed-off-by:
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Christian König authored
For a normal suspend/resume we allready wait for the rings to be empty, and for a suspend/reasume in case of a lockup we REALLY don't want to wait for anything. Signed-off-by:
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Christian König authored
Start with last signaled fence number instead of last emitted one. Signed-off-by:
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Christian König authored
It is possible that radeon_fence_process is called after writeback is disabled for suspend, leading to an invalid read of register 0x0. This fixes a problem for me where the fence value is temporary incremented by 0x100000000 on suspend/resume. Signed-off-by:
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Christian König authored
We don't need to pad anything if the number of dwords written to the ring already matches the requirements. Fixes some "writting more dword to ring than expected" warnings. Signed-off-by:
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Jerome Glisse authored
GPU reset need to be exclusive, one happening at a time. For this add a rw semaphore so that any path that trigger GPU activities have to take the semaphore as a reader thus allowing concurency. The GPU reset path take the semaphore as a writer ensuring that no concurrent reset take place. v2: init rw semaphore Signed-off-by:
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Christian König authored
Don't return success if scheduling the IB fails, otherwise we end up with an oops in ttm_eu_fence_buffer_objects. Signed-off-by:
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Christian König authored
Waiting for a fence can fail for different reasons, the most common is a deadlock. Signed-off-by:
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Christian König authored
Instead of returning the error handle it directly and while at it fix the comments about the ring lock. Signed-off-by:
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- 15 Jul, 2012 2 commits
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Chris Wilson authored
In order to support snoopable memory on non-LLC architectures (so that we can bind vgem objects into the i915 GATT for example), we have to avoid the prefetcher on the GPU from crossing memory domains and so prevent allocation of a snoopable PTE immediately following an uncached PTE. To do that, we need to extend the range allocator with support for tracking and segregating different node colours. This will be used by i915 to segregate memory domains within the GTT. v2: Now with more drm_mm helpers and less driver interference. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Alex Deucher <alexander.deucher@amd.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Dave Airlie authored
If drm can't find proc it should fail more gracefully, than just oopsing, this tests drm_class is NULL, and sets it to NULL in the fail paths. Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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- 14 Jul, 2012 1 commit
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Dave Airlie authored
Merge tag 'drm-intel-next-2012-07-06' of git://people.freedesktop.org/~danvet/drm-intel into drm-next Daniel writes: New pull for -next. Highlights: - rc6/turbo support for hsw (Eugeni) - improve corner-case of the reset handling code - gpu reset handling should be rock-solid now - support for fb offset > 4096 pixels on gen4+ (yeah, you need some fairly big screens to hit that) - the "Flush Me Harder" patch to fix the gen6+ fallout from disabling the flushing_list - no more /dev/agpgart on gen6+! - HAS_PCH_xxx improvements from Paulo - a few minor bits&pieces all over, most of it in thew hsw code * tag 'drm-intel-next-2012-07-06' of git://people.freedesktop.org/~danvet/drm-intel: (40 commits) drm/i915: program FDI_RX TP and FDI delays drm/i915: introduce for_each_encoder_on_crtc drm/i915: adjust framebuffer base address on gen4+ drm/i915: introduce crtc->dspaddr_offset drm/i915: Reject page flips with changed format/offset/pitch drm/i915: Zero initialize mode_cmd drm/i915: don't return a spurious -EIO from intel_ring_begin drm/i915: properly SIGBUS on I/O errors drm/i915: don't hang userspace when the gpu reset is stuck drm/i915: non-interruptible sleeps can't handle -EAGAIN drm/i915: don't trylock in the gpu reset code drm/i915: fix PIPE_DDI_PORT_MASK drm/i915: prevent bogus intel_update_fbc notifications drm/i915: re-initialize DDI buffer translations after resume drm/i915: don't ironlake_init_pch_refclk() on LPT drm/i915: get rid of dev_priv->info->has_pch_split drm/i915: add PCH_NONE to enum intel_pch drm/i915: prefer wide & slow to fast & narrow in DP configs drm/i915: fix up ilk rc6 disabling confusion drm/i915: move force wake support into intel_pm ...
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- 05 Jul, 2012 12 commits
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Eugeni Dodonov authored
This is required for a stable FDI connection. v2: fix and simplify the FDI_RX_MISC bits as noticed by Paulo Zanoni. CC: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by:
Eugeni Dodonov <eugeni.dodonov@intel.com> Reviewed-by:
Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by:
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Daniel Vetter authored
We already have this pattern at quite a few places, and moving part of the modeset helper stuff into the driver will add more. v2: Don't clobber the crtc struct name with the macro parameter ... v3: Convert two more places noticed by Paulo Zanoni. Reviewed-by:
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Daniel Vetter authored
The tileoffset register only supports a limited offset in x/y of 4096, so for giant screen configuration with a shared fb we wrap around. Fix this by computing a linear offset in tiles (pages) and only use the tileoffset register to offset within the tile. Reviewed-by:
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Daniel Vetter authored
To avoid recomputing the display framebuffer offset on gen2/3 pageflips. This is also prep work to do similar trickery on gen4+ Also: - kill "Start", such upper-case remnants from the ddx must surely die. - rename "Offset" to linear_offset, to make it clearer that on gen4+ this is only used by the hw for linear buffers, for tiled buffers it uses the TILEOFF register. - call DSAPADDR DSPLINOFF on gen4+ for the same reason (and because the documentation really renamed the register). Reviewed-by:
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Ville Syrjälä authored
MI display flips can't handle some changes in the framebuffer format or layout. Return an error in such cases. Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
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Ville Syrjälä authored
Zero initialize the mode_cmd structure when creating the kernel framebuffer. Avoids having uninitialized data in offsets[0] for instance. Signed-off-by:
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Daniel Vetter authored
The issue with this check is that it results in userspace receiving an -EIO while the gpu reset hasn't completed, resulting in fallback to sw rendering or worse. Now there's also a stern comment in intel_ring_wait_seqno saying that intel_ring_begin should not return -EAGAIN, ever, because some callers can't handle that. But after an audit of the callsites I don't see any issues. I guess the last problematic spot disappeared with the removal of the pipelined fencing code. So do the right thing and call check_wedge, which should properly decide whether an -EAGAIN or -EIO is appropriate if wedged is set. Note that the early check for a wedged gpu before touching the ring is rather important (and it took me quite some time of acting like the densest doofus to figure that out): If we don't do that and the gpu died for good, not having been resurrect by the reset code, userspace can merrily fill up the entire ring until it notices that something is amiss. Allowing userspace to emit more render, despite that we know that it will fail can't lead to anything good (and by experience can lead to all sorts of havoc, including angering the OOM gods and hard-hanging the hw for good). v2: Fix EAGAIN mispell, noticed by Chris Wilson. Reviewed-by:
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Daniel Vetter authored
... instead of looping endless with no hope of ever serving that page-fault. We only need to break out of this loop when the gpu died, to run the reset work (and hopefully resurrect it). To clarify questions Chris raised on irc: This is about handling I/O errors not from our own code, but e.g. when the disk died when trying to swap in a gem bo. So this patch remidies the issue that the current handling only handles gpu-death-induced cases of -EIO. Admittedly, dying disks are much rarer than hanging gpus ...To clarify questions Chris raised on irc: This is about handling I/O errors not from our own code, but e.g. when the disk died when trying to swap in a gem bo. So this patch remidies the issue that the current handling only handles gpu-death-induced cases of -EIO. Admittedly, dying disks are much rarer than hanging gpus ... This seems to have been lost in: commit d9bc7e9f Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Feb 7 13:09:31 2011 +0000 drm/i915: Fix infinite loop regression from 21dd3734Reviewed-by:
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Daniel Vetter authored
With the gpu reset no longer using a trylock we've increased the chances of userspace getting stuck quite a bit. To make that (hopefully) rare case more paletable time out when waiting for the gpu reset code to complete and signal this little issue to the caller by returning -EIO. This should help userspace to somewhat gracefully fall back and hopefully allow the user to grab some logs and reboot the machine (instead of staring at a frozen X screen in agony). Suggested by Chris Wilson because I've been stubborn about allowing the gpu reset code no to fail, ever (by removing the trylock). Reviewed-by:
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Daniel Vetter authored
So don't return -EAGAIN, even in the case of a gpu hang. Remap it to -EIO instead. Note that this isn't really an issue with interruptability, but more that we have quite a few codepaths (mostly around kms stuff) that simply can't handle any errors and hence not even -EAGAIN. Instead of adding proper failure paths so that we could restart these ioctls we've opted for the cheap way out of sleeping non-interruptibly. Which works everywhere but when the gpu dies, which this patch fixes. So essentially interruptible == false means 'wait for the gpu or die trying'.' This patch is a bit ugly because intel_ring_begin is all non-interruptible and hence only returns -EIO. But as the comment in there says, auditing all the callsites would be a pain. To avoid duplicating code, reuse i915_gem_check_wedge in __wait_seqno and intel_wait_ring_buffer. Also use the opportunity to clarify the different cases in i915_gem_check_wedge a bit with comments. v2: Don't access dev_priv->mm.interruptible from check_wedge - we might not hold dev->struct_mutex, making this racy. Instead pass interruptible in as a parameter. I've noticed this because I've hit a BUG_ON(!mutex_is_locked) at the top of check_wedge. This has been added in commit b4aca010 Author: Ben Widawsky <ben@bwidawsk.net> Date: Wed Apr 25 20:50:12 2012 -0700 drm/i915: extract some common olr+wedge code although that commit is missing any justification for this. I guess it's just copy&paste, because the same commit add the same BUG_ON check to check_olr, where it indeed makes sense. But in check_wedge everything we access is protected by other means, so this is superflous. And because it now gets in the way (we add a new caller in __wait_seqno, which can be called without dev->struct_mutext) let's just remove it. v3: Group all the i915_gem_check_wedge refactoring into this patch, so that this patch here is all about not returning -EAGAIN to callsites that can't handle syscall restarting. v4: Add clarification what interuptible == fales means in our code, requested by Ben Widawsky. v5: Fix EAGAIN mispell noticed by Chris Wilson. Reviewed-by:
Ben Widawsky <ben@bwidawsk.net> Reviewed-by:
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Daniel Vetter authored
Simply failing to reset the gpu because someone else might still hold the mutex isn't a great idea - I see reliable silent reset failures. And gpu reset simply needs to be reliable and Just Work. "But ... the deadlocks!" We already kick all processes waiting for the gpu before launching the reset work item. New waiters need to check the wedging state anyway and then bail out. If we have places that can deadlock, we simply need to fix them. "But ... testing!" We have the gpu hangman, and if the current gpu load gem_exec_nop isn't good enough to hit a specific case, we can add a new one. "But ... don't we return -EAGAIN for non-interruptible calls to wait_seqno now?" Yep, but this problem already exists in the current code. A follow up patch will remedy this by returning -EIO for non-interruptible sleeps if the gpu died and the low-level wait bails out with -EAGAIN. Reviewed-by:
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Paulo Zanoni authored
Only bits 30:28, bit 31 is PIPE_DDI_FUNC_ENABLE. Signed-off-by:
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