- 25 May, 2017 1 commit
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Jon Bloomfield authored
BXT has a H/W issue with IOMMU which can lead to system hangs when Aperture accesses are queued within the GAM behind GTT Accesses. This patch avoids the condition by wrapping all GTT updates in stop_machine and using a flushing read prior to restarting the machine. The stop_machine guarantees no new Aperture accesses can begin while the PTE writes are being emmitted. The flushing read ensures that any following Aperture accesses cannot begin until the PTE writes have been cleared out of the GAM's fifo. Only FOLLOWING Aperture accesses need to be separated from in flight PTE updates. PTE Writes may follow tightly behind already in flight Aperture accesses, so no flushing read is required at the start of a PTE update sequence. This issue was reproduced by running igt/gem_readwrite and igt/gem_render_copy simultaneously from different processes, each in a tight loop, with INTEL_IOMMU enabled. This patch was originally published as: drm/i915: Serialize GTT Updates on BXT v2: Move bxt/iommu detection into static function Remove #ifdef CONFIG_INTEL_IOMMU protection Make function names more reflective of purpose Move flushing read into static function v3: Tidy up for checkpatch.pl Testcase: igt/gem_concurrent_blit Signed-off-by:Jon Bloomfield <jon.bloomfield@intel.com> Cc: John Harrison <john.C.Harrison@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1495641251-30022-1-git-send-email-jon.bloomfield@intel.comReviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk>
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- 24 May, 2017 2 commits
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Chris Wilson authored
Having just watched someone add a new value, 0x3, without realising that the flags were bit values, I have come to appreciate the value in using BIT. Signed-off-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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Chris Wilson authored
The compiler doesn't always spot the guard that object is allocated on the first pass, leading to: drivers/gpu/drm/i915/selftests/i915_gem_context.c: warning: 'obj' may be used uninitialized in this function [-Wuninitialized]: => 370:8 v2: Make it more obvious by setting obj to NULL on the first pass and any later pass where we need to reallocate. Reported-by:
Geert Uytterhoeven <geert@linux-m68k.org> Fixes: 791ff39a ("drm/i915: Live testing for context execution") Signed-off-by:
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- 23 May, 2017 2 commits
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Michał Winiarski authored
If port[0] is occupied and we're trying to dequeue request from different context, we will inevitably hit BUG_ON in port_assign. Let's skip it - similar to what we're doing in execlists counterpart. Fixes: 77f0d0e9 ("drm/i915/execlists: Pack the count into the low bits of the port.request") Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Michał Wajdeczko <michal.wajdeczko@intel.com> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by:
Michał Winiarski <michal.winiarski@intel.com> Reviewed-by:
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Michał Winiarski authored
Passing NULL ctx to request_alloc would lead to null-ptr-deref. v2: Let's not replace the comment with a BUG_ON Signed-off-by:
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- 22 May, 2017 3 commits
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Mika Kuoppala authored
We improved the reset reliablity on gen4 with stopping all engines before commencing reset, in commit 2c80353f ("drm/i915/g4x: Improve gpu reset reliability") Evidence indicates that this same trick works with g33. v2: proper gen naming, comment readability (Chris) Testcase: igt/gem_busy/*-hang #blb-e6850 Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com> Signed-off-by:
Mika Kuoppala <mika.kuoppala@intel.com> Acked-by:
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Daniel Vetter authored
This reverts commit bc5ca47c. Gabriel put this back into generic code with commit 75f6dfe3 Author: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Date: Wed Dec 28 12:32:11 2016 -0200 drm: Deduplicate driver initialization message but somehow he missed Chris' patch to add the message meanwhile. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101025 Fixes: 75f6dfe3 ("drm: Deduplicate driver initialization message") Cc: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: <stable@vger.kernel.org> # v4.11+ Reviewed-by:
Gabriel Krisman Bertazi <krisman@collabora.co.uk> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170517131557.7836-1-daniel.vetter@ffwll.ch
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Anusha Srivatsa authored
Update version of HuC from 01.07.1748 to the version 02.00.1748 Cc: Ander Conselvan <ander.conselvan.de.oliveira@intel.com> Cc: John Spotswood <john.a.spotswood@intel.com> Signed-off-by:
Anusha Srivatsa <anusha.srivatsa@intel.com> Reviewed-by:
Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by:
Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1495129631-2930-1-git-send-email-anusha.srivatsa@intel.com
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- 19 May, 2017 6 commits
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Colin Ian King authored
The memory allocation for C is not being null checked and hence we could end up with a null pointer dereference. Fix this with a null pointer check. (I really should have noticed this when I was fixing an earlier issue.) Detected by CoverityScan, CID#1436406 ("Dereference null return") Fixes: 47624cc3 ("drm/i915: Import the kfence selftests for i915_sw_fence") Signed-off-by:Colin Ian King <colin.king@canonical.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170519175617.7036-1-colin.king@canonical.comReviewed-by:
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Michal Wajdeczko authored
Usefulness of these stats was over-advertised. v2: remove duplicated engine stats (Chris) Suggested-by:
Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170515170610.35528-1-michal.wajdeczko@intel.comAcked-by:
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Mika Kuoppala authored
ELK seems to very picky about the preconditions to reset. Evidence on Eaglelake (8086:2e12 (rev 03)) shows that it does not like if reset occurs when there is active ring. Ville found out that there is workaround with name 'WaMediaResetMainRingCleanup' which suggests that we need to cleanup rings before resetting. It is unclear what cleanup exactly means but evidence shows that stopping the ring does have an effect on reset reliability. This patch makes reset successful on hangs induced by chained batches (the igt ones). Note that if the hang is inside a shader, it is possible that our attempts to stop the ring achieves anything. v2: zero ctl,head,tail also. bug ref. use driver debugs (Chris) v3: specify platform on testcases, comment tidyup (Chris) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100942 Testcase: igt/gem_busy/*-hang #elk Testcase: igt/gem_ringfill/hang-* #elk Suggested-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com> Signed-off-by:
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Michal Wajdeczko authored
Debugfs does not seems to be a right place to display transient data. If we want to capture errors, we should log them. Signed-off-by:
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Michal Wajdeczko authored
This stat is almost always zero unless fatal error occurs, which should be reported by other means anyway. Suggested-by:
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Michal Wajdeczko authored
This member was dropped long time ago. Fixes: 774439e1 ("drm/i915/guc: re-optimise i915_guc_client layout") Signed-off-by:
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- 18 May, 2017 5 commits
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Chris Wilson authored
Ville found a reference to WaMediaResetBeforeFullReset which we presume means that we should simply do the media reset first. References: https://bugs.freedesktop.org/show_bug.cgi?id=100942Suggested-by:
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Chris Wilson authored
Repeat the reset a couple of times if at first we do not succeed. v2: differentiate which path/engine failed with a debug message Signed-off-by:
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Chris Wilson authored
Set the class on our mock pci device to GFX. This should be useful for utilities like intel-iommu that special case gfx devices. References: https://bugs.freedesktop.org/show_bug.cgi?id=101080Signed-off-by:
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Colin Ian King authored
There are two occasions where pointer B is being check for a NULL when it should be pointer C instead. Fix these. Detected by CoverityScan, CID#1436348,1436349 ("Logically Dead Code") Fixes: 47624cc3 ("drm/i915: Import the kfence selftests for i915_sw_fence") Signed-off-by: -
Hans de Goede authored
This commit fixes the following compiler warning: drivers/gpu/drm/i915/intel_dsi.c: In function ‘intel_dsi_prepare’: drivers/gpu/drm/i915/intel_dsi.c:1487:23: warning: ?: using integer constants in boolean context [-Wint-in-bool-context] PORT_A ? PORT_C : PORT_A), Fixes: f4c3a88e ("drm/i915: Tighten mmio arrays for MIPI_PORT") Signed-off-by:Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170518110644.9902-1-hdegoede@redhat.com
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- 17 May, 2017 21 commits
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Kumar, Mahesh authored
This patch make changes to use linetime latency if allocated DDB size during plane watermark calculation is not available. linetime is the time, display engine takes to fetch one line worth of pixels with given pixel clock rate. This is required to implement new DDB allocation algorithm. In New Algorithm DDB is allocated based on WM values, because of which number of DDB blocks will not be available during WM calculation, So this "linetime latency" is suggested by SV/HW team to be used during switch-case for WM blocks selection. linetime latency us = pipe horizontal total pixels/adjusted pixel rate MHz Changes since v1: - Rebase on top of Paulo's patch series Changes since v2: - Fix if-else condition (pointed by Maarten) Changes since v3: - Use common function for timetime_us calculation (Paulo) - rebase on drm-tip Changes since v4: - Use consistent name for fixed_point operation Changes since v5: - Improve commit message - rename skl_get_linetime_us to intel_get_linetime_us - fix watermark result selection (Matt) Signed-off-by:
"Mahesh Kumar" <mahesh1.kumar@intel.com> Reviewed-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by:
Matt Roper <matthew.d.roper@intel.com> Signed-off-by:
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Kumar, Mahesh authored
Instead of iterating over planes & wm levels in a single function use skl_compute_wm_level function to interate over WM levels. Change name of function to skl_compute_wm_levels (Matt). These changes are to clean-up WM code & will help in making only new ddb algorithm related changes in later patch in series. Signed-off-by:
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Kumar, Mahesh authored
This patch cleanup/reorganises the watermark calculation functions. This patch make use of already available macro "drm_atomic_crtc_state_for_each_plane_state" to walk through plane_state list instead of calculating plane_state in function itself. This restructuring will help later patch for new DDB allocation algorithm to do only algo related changes. Changes from V1: - split the patch in two parts as per Matt's comment Signed-off-by:
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Kumar, Mahesh authored
DDB minimum requirement of crtc configuration (cumulative of all the enabled planes in crtc) may exceed the allocated DDB for crtc/pipe. This patch make changes to fail the flip/ioctl if minimum requirement for pipe exceeds the total ddb allocated to the pipe. Previously it succeeded but making alloc_size a negative value. Which will make subsequent calculations for plane ddb allocation bogus & may lead to screen corruption or system hang. Changes from V1: - Improve commit message as per Ander's comment - Remove extra parentheses (Ander) Signed-off-by:
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Kumar, Mahesh authored
We are already doing memset of ddb structure at the begining of skl_allocate_pipe_ddb function, No need to again do a memset. Signed-off-by:
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Kumar, Mahesh authored
Fail the flip if no FB is present but plane_state is set as visible. Above is not a valid combination so instead of continue fail the flip. Signed-off-by:
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Kumar, Mahesh authored
This patch make changes to calculate adjusted plane pixel rate & plane downscale amount using fixed_point functions available. This patch will give uniformity in code, & will help to avoid mixing of 32bit uint32_t variable for fixed-16.16 with fixed_16_16_t variables in later patch in the series. Changes from V1: - Rebase based on wrapper name change - Remove unnecessary comment Signed-off-by:
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Kumar, Mahesh authored
Don't use fixed_16_16 structure members directly, instead use wrapper to perform fixed_16_16 division operation. Signed-off-by:
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Kumar, Mahesh authored
This patch adds few wrapper to perform fixed_point_16_16 operations mul_round_up_u32_fixed16 : Multiplies u32 and fixed_16_16_t variables & returns u32 result with rounding-up. mul_fixed16 : Multiplies two fixed_16_16_t variable & returns fixed_16_16 div_round_up_fixed16 : Perform division operation on fixed_16_16_t variables & return u32 result with round-off div_round_up_u32_fixed16 : devide uint32_t variable by fixed_16_16 variable and round_up the result to uint32_t. These wrappers will be used by later patches in the series. Changes from V1: - Rename wrapper as per Matt's comment Changes from V2: - Fix indentation Signed-off-by:
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Kumar, Mahesh authored
fixed_16_16_div_round_up(_u64), wrapper for fixed_16_16 division operation don't really round_up the result. Wrapper round_up only the fraction part of the result to make it 16-bit. This patch eliminates round_up keyword from the wrapper. Later patch will introduce the new wrapper to do rounding-off the result and give unt32_t output to cleanup mix use of fixed_16_16_t & uint32_t variables. Signed-off-by:
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Chris Wilson authored
Since we coordinate with the execlists tasklet using a locked schedule operation that ensures that after we set the engine->irq_posted we always have an invocation of the tasklet, we do not need to use a locked operation to set the engine->irq_posted itself. Signed-off-by:
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Chris Wilson authored
As the handler is now quite complex, involving a few atomics, the cost of the function preamble is negligible in comparison and so we should leave the function out-of-line for better I$. Signed-off-by:
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Chris Wilson authored
If we do not require to perform priority bumping, and we haven't yet submitted the request, we can update its priority in situ and skip acquiring the engine locks -- thus avoiding any contention between us and submit/execute. v2: Remove the stack element from the list if we can do the early assignment. Signed-off-by:
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Chris Wilson authored
The i915_priolist are allocated within an atomic context on a path where we wish to minimise latency. If we use a dedicated kmem_cache, we have the advantage of a local freelist from which to service new requests that should keep the latency impact of an allocation small. Though currently we expect the majority of requests to be at default priority (and so hit the preallocate priolist), once userspace starts using priorities they are likely to use many fine grained policies improving the utilisation of a private slab. Signed-off-by:
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Chris Wilson authored
All the requests at the same priority are executed in FIFO order. They do not need to be stored in the rbtree themselves, as they are a simple list within a level. If we move the requests at one priority into a list, we can then reduce the rbtree to the set of priorities. This should keep the height of the rbtree small, as the number of active priorities can not exceed the number of active requests and should be typically only a few. Currently, we have ~2k possible different priority levels, that may increase to allow even more fine grained selection. Allocating those in advance seems a waste (and may be impossible), so we opt for allocating upon first use, and freeing after its requests are depleted. To avoid the possibility of an allocation failure causing us to lose a request, we preallocate the default priority (0) and bump any request to that priority if we fail to allocate it the appropriate plist. Having a request (that is ready to run, so not leading to corruption) execute out-of-order is better than leaking the request (and its dependency tree) entirely. There should be a benefit to reducing execlists_dequeue() to principally using a simple list (and reducing the frequency of both rbtree iteration and balancing on erase) but for typical workloads, request coalescing should be small enough that we don't notice any change. The main gain is from improving PI calls to schedule, and the explicit list within a level should make request unwinding simpler (we just need to insert at the head of the list rather than the tail and not have to make the rbtree search more complicated). v2: Avoid use-after-free when deleting a depleted priolist v3: Michał found the solution to handling the allocation failure gracefully. If we disable all priority scheduling following the allocation failure, those requests will be executed in fifo and we will ensure that this request and its dependencies are in strict fifo (even when it doesn't realise it is only a single list). Normal scheduling is restored once we know the device is idle, until the next failure! Suggested-by:
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Chris Wilson authored
Explicitly assign the default priority, and give it a name. After much discussion, we have chosen to call it I915_PRIORITY_NORMAL! Signed-off-by:
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Chris Wilson authored
If we *know* that the engine is idle, i.e. we have not more contexts in flight, we can skip any spurious CSB idle interrupts. These spurious interrupts seem to arrive long after we assert that the engines are completely idle, triggering later assertions: [ 178.896646] intel_engine_is_idle(bcs): interrupt not handled, irq_posted=2 [ 178.896655] ------------[ cut here ]------------ [ 178.896658] kernel BUG at drivers/gpu/drm/i915/intel_engine_cs.c:226! [ 178.896661] invalid opcode: 0000 [#1] SMP [ 178.896663] Modules linked in: i915(E) x86_pkg_temp_thermal(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) nls_ascii(E) nls_cp437(E) vfat(E) fat(E) intel_gtt(E) i2c_algo_bit(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) aesni_intel(E) prime_numbers(E) evdev(E) aes_x86_64(E) drm(E) crypto_simd(E) cryptd(E) glue_helper(E) mei_me(E) mei(E) lpc_ich(E) efivars(E) mfd_core(E) battery(E) video(E) acpi_pad(E) button(E) tpm_tis(E) tpm_tis_core(E) tpm(E) autofs4(E) i2c_i801(E) fan(E) thermal(E) i2c_designware_platform(E) i2c_designware_core(E) [ 178.896694] CPU: 1 PID: 522 Comm: gem_exec_whispe Tainted: G E 4.11.0-rc5+ #14 [ 178.896702] task: ffff88040aba8d40 task.stack: ffffc900003f0000 [ 178.896722] RIP: 0010:intel_engine_init_global_seqno+0x1db/0x1f0 [i915] [ 178.896725] RSP: 0018:ffffc900003f3ab0 EFLAGS: 00010246 [ 178.896728] RAX: 0000000000000000 RBX: ffff88040af54000 RCX: 0000000000000000 [ 178.896731] RDX: ffff88041ec933e0 RSI: ffff88041ec8cc48 RDI: ffff88041ec8cc48 [ 178.896734] RBP: ffffc900003f3ac8 R08: 0000000000000000 R09: 000000000000047d [ 178.896736] R10: 0000000000000040 R11: ffff88040b344f80 R12: 0000000000000000 [ 178.896739] R13: ffff88040bce0000 R14: ffff88040bce52d8 R15: ffff88040bce0000 [ 178.896742] FS: 00007f2cccc2d8c0(0000) GS:ffff88041ec80000(0000) knlGS:0000000000000000 [ 178.896746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 178.896749] CR2: 00007f41ddd8f000 CR3: 000000040bb03000 CR4: 00000000001406e0 [ 178.896752] Call Trace: [ 178.896768] reset_all_global_seqno.part.33+0x4e/0xd0 [i915] [ 178.896782] i915_gem_request_alloc+0x304/0x330 [i915] [ 178.896795] i915_gem_do_execbuffer+0x8a1/0x17d0 [i915] [ 178.896799] ? remove_wait_queue+0x48/0x50 [ 178.896812] ? i915_wait_request+0x300/0x590 [i915] [ 178.896816] ? wake_up_q+0x70/0x70 [ 178.896819] ? refcount_dec_and_test+0x11/0x20 [ 178.896823] ? reservation_object_add_excl_fence+0xa5/0x100 [ 178.896835] i915_gem_execbuffer2+0xab/0x1f0 [i915] [ 178.896844] drm_ioctl+0x1e6/0x460 [drm] [ 178.896858] ? i915_gem_execbuffer+0x260/0x260 [i915] [ 178.896862] ? dput+0xcf/0x250 [ 178.896866] ? full_proxy_release+0x66/0x80 [ 178.896869] ? mntput+0x1f/0x30 [ 178.896872] do_vfs_ioctl+0x8f/0x5b0 [ 178.896875] ? ____fput+0x9/0x10 [ 178.896878] ? task_work_run+0x80/0xa0 [ 178.896881] SyS_ioctl+0x3c/0x70 [ 178.896885] entry_SYSCALL_64_fastpath+0x17/0x98 [ 178.896888] RIP: 0033:0x7f2ccb455ca7 [ 178.896890] RSP: 002b:00007ffcabec72d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 178.896894] RAX: ffffffffffffffda RBX: 000055f897a44b90 RCX: 00007f2ccb455ca7 [ 178.896897] RDX: 00007ffcabec74a0 RSI: 0000000040406469 RDI: 0000000000000003 [ 178.896900] RBP: 00007f2ccb70a440 R08: 00007f2ccb70d0a4 R09: 0000000000000000 [ 178.896903] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 178.896905] R13: 000055f89782d71a R14: 00007ffcabecf838 R15: 0000000000000003 [ 178.896908] Code: 00 31 d2 4c 89 ef 8d 70 48 41 ff 95 f8 06 00 00 e9 68 fe ff ff be 0f 00 00 00 48 c7 c7 48 dc 37 a0 e8 fa 33 d6 e0 e9 0b ff ff ff <0f> 0b 0f 0b 0f 0b 0f 0b 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 On the other hand, by ignoring the interrupt do we risk running out of space in CSB ring? Testing for a few hours suggests not, i.e. that we only seem to get the odd delayed CSB idle notification. Signed-off-by:
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Chris Wilson authored
add/remove: 1/1 grow/shrink: 5/4 up/down: 391/-578 (-187) function old new delta execlists_submit_ports 262 471 +209 port_assign.isra - 136 +136 capture 6344 6359 +15 reset_common_ring 438 452 +14 execlists_submit_request 228 238 +10 gen8_init_common_ring 334 341 +7 intel_engine_is_idle 106 105 -1 i915_engine_info 2314 2290 -24 __i915_gem_set_wedged_BKL 485 411 -74 intel_lrc_irq_handler 1789 1604 -185 execlists_update_context 294 - -294 The most important change there is the improve to the intel_lrc_irq_handler and excclist_submit_ports (net improvement since execlists_update_context is now inlined). v2: Use the port_api() for guc as well (even though currently we do not pack any counters in there, yet) and hide all port->request_count inside the helpers. Signed-off-by:
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Chris Wilson authored
Rebrand the current (pointer | bits) pack/unpack utility macros as explicit bit twiddling for PAGE_SIZE so that we can use the more flexible underlying macros for different bits. Signed-off-by:
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Chris Wilson authored
ptr_unpack_bits() is a function-like macro, as such it is meant to be replaceable by a function. In this case, we should be passing in the out-param as a pointer. Bizarrely this does affect code generation: function old new delta i915_gem_object_pin_map 409 389 -20 An improvement(?) in this case, but one can't help wonder what strict-aliasing optimisations we are preventing. The generated code looks identical in using ptr_unpack_bits (no extra motions to stack, the pointer and bits appear to be kept in registers), the difference appears to be code ordering and with a reorder it is able to use smaller forward jumps. Signed-off-by:
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Chris Wilson authored
A long time ago, I wrote some selftests for the struct kfence idea. Now that we have infrastructure in i915/igt for running kselftests, include some for i915_sw_fence. v2: INIT_WORK_ONSTACK/destroy_work_on_stack (Mika) Signed-off-by:
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