- 11 Apr, 2017 17 commits
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Jani Nikula authored
Localize link_rate_index to the if block, and rename to just index to reduce indent. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Manasi Navare <manasi.d.navare@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/d348d990c96705427b93c1cac8c3e4447d06eebf.1491485983.git.jani.nikula@intel.com
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Jani Nikula authored
The source might not support as many lanes as the sink, or the link training might have failed at higher lane counts. Take these into account. Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
These are the theoretical maximums common for source and sink. These are the maximums we should start with. They may be degraded in case of link training failures, and the dynamic link values are stored separately. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
If we modify these on the fly depending on the link conditions, don't pretend they are sink properties. Some link vs. sink confusion still remains, but we'll take care of them in follow-up patches. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
In link training fallback, we're trying to find a rate that we know is in a sorted array of common link rates. We don't need to limit the array using the max rate. For test request, the DP CTS doesn't say we should limit the rate based on earlier fallback. This lets us get rid of intel_dp_link_rate_index() and use intel_dp_rate_index() instead. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
Now that source rates are static and sink rates are updated whenever DPCD is updated, we can do and cache the intersection of them whenever sink rates are updated. This reduces code complexity, as we don't have to keep calling the functions to intersect. We also get rid of several common rates arrays on stack. Limiting the common rates by a max link rate can be done by picking the first N elements of the cached common rates. v2: get rid of the local common_rates variable (Manasi) v3: don't clobber cached eDP rates on short pulse (Ville) Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
Looking at DPCD DP_MAX_LINK_RATE may be completely bogus for eDP 1.4 which is allowed to use link rate select method and have 0 in max link rate. With this change, it makes sense to store the max rate as the actual rate rather than as a bw code. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
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Chris Wilson authored
We want to refer to the index of the engine consistently throughout the userspace ABI. We already have such an index through the execbuffer engine specifier, that needs to be able to refer to each engine specifically, so rename it the index to uabi_id to reflect its generality beyond execbuf. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170411124306.15448-1-chris@chris-wilson.co.uk
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Oscar Mateo authored
There are some properties that logically belong to the engine class, and some that belong to the engine instance. Make it explicit. v2: Commit message (Tvrtko) v3: - Rebased - Exec/uabi id should be per instance (Chris) v4: - Rebased - Avoid re-ordering fields for smaller diff (Tvrtko) - Bug on oob access to the class array (Michal) v5: Bug on the right thing (Michal) v6: Rebased Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by:
Michal Wajdeczko <michal.wajdeczko@intel.com> Signed-off-by:
Oscar Mateo <oscar.mateo@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1491834873-9345-5-git-send-email-oscar.mateo@intel.comReviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by:
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Oscar Mateo authored
Not really needed, but makes the next change a little bit more compact. v2: - Use zero-based numbering for engine names: xcs0, xcs1.. xcsN (Tvrtko, Chris) - Make sure the mock engine name is null-terminated (Tvrtko, Chris) v3: Because I'm stupid (Chris) v4: Verify engine name wasn't truncated (Michal) v5: - Kill the warning in mock engine (Chris) Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by:
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Oscar Mateo authored
If we needed to do something different for the init functions, we could always look at the engine instance to make the distinction. But, in any case, the two functions are virtually identical already (please notice that BSD2_RING is only used from gen8 onwards). With this, the init functions depends excusively on the engine class (a fact that we will use soon). v2: Commit message Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by:
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Daniele Ceraolo Spurio authored
In such a way that vcs and vcs2 are just two different instances (0 and 1) of the same engine class (VIDEO_DECODE_CLASS). v2: Align the instance types (Tvrtko) v3: Don't use enums for bspec-defined stuff (Michal) Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by:
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Chris Wilson authored
While we do hold the forcewake for legacy ringbuffer initialisation, we don't guard our access with the uncore.lock spinlock. In theory, we only initialise when no others should be accessing the same mmio cachelines, but in practice be safe as this is an infrequently used path and not worth risky micro-optimisations. Signed-off-by:
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Chris Wilson authored
Since the sandybridge_pcode_read() may be called from skl_pcode_request() inside an atomic context (with preempt disabled), we should avoid hitting any sleeping paths. Currently is being called with a 500ms timeout, irrespective of being inside an atomic context or not. This is reduced down to 500us to play nice with the atomic context, and that appears to be sufficient to keep BAT happy (we have a DRM_ERROR should it timeout), i.e. we do not see any 500us pcode timeouts for normal use. So leave it as a pure spin without having to introduce new code paths to separate atomic/normal contexts. Signed-off-by:
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Chris Wilson authored
We acquire the forcewake and use I915_READ_FW instead for the atomic wait within intel_uncore_wait_for_register. However, this still leaves us vulnerable to concurrent mmio access to the register, which can cause system hangs on gen7. The protection is to acquire uncore.lock around each register, so lets add it back. v2: Wrap __intel_wait_for_register_fw() to re-use its atomic wait_for loop and spare adding another for ourselves. v3: Add might_sleep() annotation Signed-off-by:
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Chris Wilson authored
submit_request() is called from an atomic context, it's not allowed to sleep. We have to be careful in our parameters to intel_uncore_wait_for_register() to limit ourselves to the atomic wait loop and not incur the wrath of our warnings. Fixes: 6976e74b ("drm/i915: Don't allow overuse of __intel_wait_for_register_fw()") Signed-off-by:
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Chris Wilson authored
Allow the caller to use the fast_timeout_us to specify how long to wait within the atomic section, rather than transparently switching to a sleeping loop for larger values. This is required as some callsites may need a long wait and are in an atomic section. v2: Reinforce kerneldoc fast_timeout_us limit with a GEM_BUG_ON Signed-off-by:
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- 10 Apr, 2017 3 commits
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Michal Wajdeczko authored
This function should not be called with long timeouts in atomic context. Annotate it as might_sleep if timeout is longer than 10us. v2: fix comment (Michal) Signed-off-by:
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Michal Wajdeczko authored
These params are passed by value, const qualifiers are ignored any way. While around, unify timeout_ms type from long to int. Signed-off-by:
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Chris Wilson authored
The void *data passed to debugfs callbacks is actually the drm_i915_private pointer, so use it thusly and avoid the to_i915(dev) indirection. Signed-off-by:
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- 07 Apr, 2017 14 commits
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Michal Wajdeczko authored
Waiting for the response status in scratch register can be done using our generic function. Let's use it. v2: rebased Signed-off-by:
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Michal Wajdeczko authored
In some cases we may want to spend more time in atomic wait than hardcoded 2us. Let's add additional fast timeout parameter to allow flexible configuration of atomic timeout before switching into heavy wait. Add also possibility to return registry value to avoid extra read. v2: use explicit fast timeout (Tvrtko/Chris) allow returning register value (Chris) Signed-off-by: -
Michal Wajdeczko authored
There is no need to specify timeout as unsigned long since this parameter will be consumed by usecs_to_jiffies() which expects unsigned int only. Signed-off-by:
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Chris Wilson authored
As we may have very many objects to free, check to see if the task needs to be rescheduled whilst freeing them. Suggested-by:
Andrea Arcangeli <aarcange@redhat.com> Signed-off-by:
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Chris Wilson authored
Before freeing the next batch of objects from the worker, check if the worker's timeslice has expired and if so, defer the next batch to the next invocation of the worker. Suggested-by:
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Joonas Lahtinen authored
By using the same structure for both interruptible and uninterruptible locking in shrinker code, combined with the information that mm.interruptible is only being written to, the code can be greatly simplified. Also removing the i915_gem_ prefix from the locking functions so that nobody in their wildest dreams considers exporting them. Signed-off-by:
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Joonas Lahtinen authored
Only call synchronize_rcu_expedited after unlocking struct_mutex to avoid deadlock because the workqueues depend on struct_mutex. >From original patch by Andrea: synchronize_rcu/synchronize_sched/synchronize_rcu_expedited() will hang until its own workqueues are run. The i915 gem workqueues will wait on the struct_mutex to be released. So we cannot wait for a quiescent state using those rcu primitives while holding the struct_mutex or it creates a circular lock dependency resulting in kernel hangs (which is reproducible but goes undetected by lockdep). kswapd0 D 0 700 2 0x00000000 Call Trace: ? __schedule+0x1a5/0x660 ? schedule+0x36/0x80 ? _synchronize_rcu_expedited.constprop.65+0x2ef/0x300 ? wake_up_bit+0x20/0x20 ? rcu_stall_kick_kthreads.part.54+0xc0/0xc0 ? rcu_exp_wait_wake+0x530/0x530 ? i915_gem_shrink+0x34b/0x4b0 ? i915_gem_shrinker_scan+0x7c/0x90 ? i915_gem_shrinker_scan+0x7c/0x90 ? shrink_slab.part.61.constprop.72+0x1c1/0x3a0 ? shrink_zone+0x154/0x160 ? kswapd+0x40a/0x720 ? kthread+0xf4/0x130 ? try_to_free_pages+0x450/0x450 ? kthread_create_on_node+0x40/0x40 ? ret_from_fork+0x23/0x30 plasmashell D 0 4657 4614 0x00000000 Call Trace: ? __schedule+0x1a5/0x660 ? schedule+0x36/0x80 ? schedule_preempt_disabled+0xe/0x10 ? __mutex_lock.isra.4+0x1c9/0x790 ? i915_gem_close_object+0x26/0xc0 ? i915_gem_close_object+0x26/0xc0 ? drm_gem_object_release_handle+0x48/0x90 ? drm_gem_handle_delete+0x50/0x80 ? drm_ioctl+0x1fa/0x420 ? drm_gem_handle_create+0x40/0x40 ? pipe_write+0x391/0x410 ? __vfs_write+0xc6/0x120 ? do_vfs_ioctl+0x8b/0x5d0 ? SyS_ioctl+0x3b/0x70 ? entry_SYSCALL_64_fastpath+0x13/0x94 kworker/0:0 D 0 29186 2 0x00000000 Workqueue: events __i915_gem_free_work Call Trace: ? __schedule+0x1a5/0x660 ? schedule+0x36/0x80 ? schedule_preempt_disabled+0xe/0x10 ? __mutex_lock.isra.4+0x1c9/0x790 ? del_timer_sync+0x44/0x50 ? update_curr+0x57/0x110 ? __i915_gem_free_objects+0x31/0x300 ? __i915_gem_free_objects+0x31/0x300 ? __i915_gem_free_work+0x2d/0x40 ? process_one_work+0x13a/0x3b0 ? worker_thread+0x4a/0x460 ? kthread+0xf4/0x130 ? process_one_work+0x3b0/0x3b0 ? kthread_create_on_node+0x40/0x40 ? ret_from_fork+0x23/0x30 Fixes: 3d3d18f0 ("drm/i915: Avoid rcu_barrier() from reclaim paths (shrinker)") Reported-by:
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Chris Wilson authored
As we call into the shrinker during freeze, we may have freed more objects since we idled during i915_gem_suspend. Make sure we flush the i915_gem_free_objects worker prior to saving the unwanted pages into the hibernation image. Signed-off-by:
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Chris Wilson authored
The shrinker is prepared to be called unlocked (and at other times with struct_mutex held for DIRECT_RECLAIM) so we can skip acquiring the struct_mutex prior to calling the shrinker during freeze. This improves our ability to shrink as we can be more aggressive when we know the caller isn't holding struct_mutex. Signed-off-by:
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Andrea Arcangeli authored
Just in case the llist model changes and NULL isn't valid initialization. Signed-off-by:
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Chris Wilson authored
When we retire the last request on the ring, before we ever access that ring again we know it will be completely idle and so we can advance the ring->head fully to the end (i.e. ring->tail) and not just to the start of the breadcrumb. This allows us to skip re-emitting the breadcrumb after resetting the GPU if the ring was entirely idle. This prevents us from overwriting a seqno wraparound by re-executing a stale breadcrumb, i.e. submit_request(1) intel_engine_init_global_seqno(0) i915_reset() would then leave 1 in the HWS, but the next request to execute would also be with seqno 1. The sanity checks upon submission detect this as a timewarp and explode. By setting the ring as empty, upon reset the HWS is left as 0, leaving it consistent with the timeline. v2: Fix check for deleting last element of list. We know that this request is always the first element of the ring, so only if next points back to the start will this be the only request in flight. v3: Remove opencoding of list_is_last() v4: Move the block to its own function for some clarity. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100144 Testcase: igt/gem_exec_whisper/hang-* Signed-off-by:
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Chris Wilson authored
When we update the global seqno (on the engine timeline), we modify HW state (both registers and mapped pages). As we do this, we should be sure that the HW is idle and we are not causing a conflict. The caller is supposed to wait_for_idle before calling us to update the seqno, so let's assert they have and the engine is indeed idle. Signed-off-by:
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Anusha Srivatsa authored
Load HuC version 1.07.1748 on GLK. v2: rebased. v3: Use name of the right platform(John Spotswood) v4: rebased. Cc: Jeff Mcgee <jeff.mcgee@intel.com> Cc: John Spotswood <john.a.spotswood@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
Anusha Srivatsa <anusha.srivatsa@intel.com> Reviewed-by:
John Spotswood <john.a.spotswood@intel.com> Signed-off-by:
Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1490905447-15815-2-git-send-email-anusha.srivatsa@intel.com
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Anusha Srivatsa authored
Load GuC 10.56 on GLK. Work on firmware is still in progress. Testing has not been done yet. This patch addresses the initial need to load the GuC firmware for HuC authentication v2: rebased. Cc: Jeff mcgee <jeff.mcgee@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: John Spotswood <john.a.spotswood@intel.com> Signed-off-by:
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- 06 Apr, 2017 6 commits
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Chris Wilson authored
Many sightings report the greater prevalence of allocation failures. This is all due to the incorrect use of mapping_gfp_constraint(), so remove it in favour of just querying the mapping_gfp_mask() which are the exact gfp_t we wanted in the first place. We still do expect a higher chance of reporting ENOMEM, as that is the intention of using __GFP_NORETRY -- to fail rather than oom after having reclaimed from our bo caches, and having done a direct|kswapd reclaim pass. Reported-by:
Jason Ekstrand <jason.ekstrand@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100594 Fixes: 24f8e00a ("drm/i915: Prefer to report ENOMEM rather than incur the oom for gfx allocations") Signed-off-by:
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Madhav Chauhan authored
As per BSPEC, valid cdclk values for glk are 79.2, 158.4, 316.8 Mhz. Practically we can achive only 99% of these cdclk values (HW team checking on this). So cdclk should be calculated for the given pixclk as per that otherwise it may lead to screen corruption, explained below: 1. For DSI AUO panel(1920x1200 @60) required pixclk is 157100 KHZ 2. glk_calc_cdclk returns 79200 KHZ for this pixclk, For 2PPC it will be 158400 KHZ 3. Practically 100% of the cdclk can’t be achieved, so 99% of 158400 KHZ = 156816 which is less than the desired pixlclk and causes panel corruption. v2: Rebased to new CDLCK code framework v3: Addressed review comments from Ander/Jani - Add comment in code about 99% usage of CDCLK - Calculate max dot clock as well with 99% limit v4 by Jani: - drop superfluous whitespace change - rewrite code comments to clarify v5: Added details of non-working scenario in commit message Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:Madhav Chauhan <madhav.chauhan@intel.com> Signed-off-by:
Ander Conselvan de Oliveira <conselvan2@gmail.com> Link: http://patchwork.freedesktop.org/patch/msgid/1491397463-13637-1-git-send-email-madhav.chauhan@intel.com
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Jani Nikula authored
There is some conflation related to sink rates, making this change more complicated than it would otherwise have to be. There are three changes here that are rather difficult to split up: 1) Use the intel_dp->sink_rates array for all DP, not just eDP 1.4. We initialize it from DPCD on eDP 1.4 like before, but generate it based on DP_MAX_LINK_RATE on others. This reduces code complexity when we need to use the sink rates; they are all always in the sink_rates array. 2) Update the sink rate array whenever we read DPCD, and use the information from there. This increases code readability when we need the sink rates. 3) Disentangle fallback rate limiting from sink rates. In the code, the max rate is a dynamic property of the *link*, not of the *sink*. Do the limiting after intersecting the source and sink rates, which are static properties of the devices. This paves the way for follow-up refactoring that I've refrained from doing here to keep this change as simple as it possibly can. v2: introduce use_rate_select and handle non-confirming eDP (Ville) v3: don't clobber cached eDP rates on short pulse (Ville) Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
We need the source rates array so often that it makes sense to set it once at init. This reduces function calls when we need the rates, making the code easier to follow. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
Rename the function, move it at the top, and reuse in intel_dp_link_rate_index(). If there was a reason in the past to use reverse search order here, there isn't now. The names may be slightly confusing now, but intel_dp_link_rate_index() will go away in follow-up patches. v2: Use name intel_dp_rate_index (Dhinakaran) Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Jani Nikula authored
We shouldn't silently use the first element if we can't find the rate we're looking for. Make rate_to_index() more generally useful, and fallback to the first element in the caller, with a big warning. Cc: Manasi Navare <manasi.d.navare@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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