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2275 Commits

Author SHA1 Message Date
Chris Wilson
9da0ea0963 drm/i915/gem: Drop cached obj->bind_count 
We cached the number of vma bound to the object in order to speed up
shrinker decisions. This has been superseded by being more proactive in
removing objects we cannot shrink from the shrinker lists, and so we can
drop the clumsy attempt at atomically counting the bind count and
comparing it to the number of pinned mappings of the object. This will
only get more clumsier with asynchronous binding and unbinding.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200401223924.16667-1-chris@chris-wilson.co.uk
 2020-04-02 01:17:39 +01:00
Chris Wilson
0d86ee3509 drm/i915/gt: Make fence revocation unequivocal 
If we must revoke the fence because the VMA is no longer present, or
because the fence no longer applies, ensure that we do and convert it
into an error if we try but cannot.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200401210104.15907-3-chris@chris-wilson.co.uk
 2020-04-01 23:34:17 +01:00
Chris Wilson
dec9cf9ee8 drm/i915/gt: Pull restoration of GGTT fences underneath the GT 
Make the GT responsible for restoring its fence when it wakes up from
suspend.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200316113846.4974-2-chris@chris-wilson.co.uk
 2020-03-16 20:28:28 +00:00
Chris Wilson
f899f786d1 drm/i915: Move GGTT fence registers under gt/ 
Since the fence registers control HW detiling through the GGTT
aperture, make them a part of the intel_ggtt under gt/

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200316113846.4974-1-chris@chris-wilson.co.uk
 2020-03-16 20:28:26 +00:00
Jani Nikula
83d2bdb6a0 drm/i915: significantly reduce the use of <drm/i915_drm.h> 
The #include has been splattered all over the place, but there are
precious few places, all .c files, that actually need it.

v2: remove leftover double newlines

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200225133131.3301-1-jani.nikula@intel.com
 2020-02-27 08:35:09 +02:00
Janusz Krzysztofik
f6c26b555e drm/i915: Never allow userptr into the new mapping types 
Commit 4f2a572eda ("drm/i915/userptr: Never allow userptr into the
mappable GGTT") made I915_GEM_MMAP_GTT IOCTLs to fail when attempted
on a userptr object in order to protect from a lockdep splat.  Later
on, new mapping types were introduced by commit cc662126b4
("drm/i915: Introduce DRM_I915_GEM_MMAP_OFFSET").  Those new mapping
types suffer from the same lockdep splat issue but they now succeed
when tried on top of a userptr object.  Fix it.

v2: Don't play with the -ENODEV driver response (Chris)

Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200204162302.1299516-1-chris@chris-wilson.co.uk
 2020-02-08 11:26:03 +00:00
Chris Wilson
c6790dc223 drm/i915: Wean off drm_pci_alloc/drm_pci_free 
drm_pci_alloc and drm_pci_free are just very thin wrappers around
dma_alloc_coherent, with a note that we should be removing them.
Furthermore since

commit de09d31dd3
Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Date:   Fri Jan 15 16:51:42 2016 -0800

    page-flags: define PG_reserved behavior on compound pages

    As far as I can see there's no users of PG_reserved on compound pages.
    Let's use PF_NO_COMPOUND here.

drm_pci_alloc has been declared broken since it mixes GFP_COMP and
SetPageReserved. Avoid this conflict by weaning ourselves off using the
abstraction and using the dma functions directly.

Reported-by: Taketo Kabe
Closes: https://gitlab.freedesktop.org/drm/intel/issues/1027
Fixes: de09d31dd3 ("page-flags: define PG_reserved behavior on compound pages")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: <stable@vger.kernel.org> # v4.5+
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200202153934.3899472-1-chris@chris-wilson.co.uk
 2020-02-04 13:06:19 +00:00
Chris Wilson
e3793468b4 drm/i915: Use the async worker to avoid reclaim tainting the ggtt->mutex 
On Braswell and Broxton (also known as Valleyview and Apollolake), we
need to serialise updates of the GGTT using the big stop_machine()
hammer. This has the side effect of appearing to lockdep as a possible
reclaim (since it uses the cpuhp mutex and that is tainted by per-cpu
allocations). However, we want to use vm->mutex (including ggtt->mutex)
from within the shrinker and so must avoid such possible taints. For this
purpose, we introduced the asynchronous vma binding and we can apply it
to the PIN_GLOBAL so long as take care to add the necessary waits for
the worker afterwards.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/211
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200130181710.2030251-3-chris@chris-wilson.co.uk
 2020-01-30 21:35:43 +00:00
Chris Wilson
e986209c67 drm/i915/gt: Rename i915_gem_restore_ggtt_mappings() for its new placement 
The i915_ggtt now sits beneath gt/ outside of the auspices of gem/ and
should be given a fresh name to reflect that. We also want to give it a
name that reflects its role in the system suspend/resume, with the
intention of pulling together all the GGTT operations (e.g. restoring
the fence registers once they are pulled under gt/intel_ggtt_detiler.c)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Rreviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200130181710.2030251-2-chris@chris-wilson.co.uk
 2020-01-30 21:35:37 +00:00
Chris Wilson
0f8f8a6430 drm/i915/gem: Detect overflow in calculating dumb buffer size 
To multiply 2 u32 numbers to generate a u64 in C requires a bit of
forewarning for the compiler.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ramalingam C <ramalingam.c@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200123125934.1401755-1-chris@chris-wilson.co.uk
 2020-01-24 10:09:56 +00:00
Pankaj Bharadiya
48a1b8d4af drm/i915: Make WARN* drm specific where drm_priv ptr is available 
drm specific WARN* calls include device information in the
backtrace, so we know what device the warnings originate from.

Covert all the calls of WARN* with device specific drm_WARN*
variants in functions where drm_i915_private struct pointer is readily
available.

The conversion was done automatically with below coccinelle semantic
patch. checkpatch errors/warnings are fixed manually.

@rule1@
identifier func, T;
@@
func(...) {
...
struct drm_i915_private *T = ...;
<+...
(
-WARN(
+drm_WARN(&T->drm,
...)
|
-WARN_ON(
+drm_WARN_ON(&T->drm,
...)
|
-WARN_ONCE(
+drm_WARN_ONCE(&T->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&T->drm,
...)
)
...+>
}

@rule2@
identifier func, T;
@@
func(struct drm_i915_private *T,...) {
<+...
(
-WARN(
+drm_WARN(&T->drm,
...)
|
-WARN_ON(
+drm_WARN_ON(&T->drm,
...)
|
-WARN_ONCE(
+drm_WARN_ONCE(&T->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&T->drm,
...)
)
...+>
}

command: ls drivers/gpu/drm/i915/*.c | xargs spatch --sp-file \
			<script> --linux-spacing --in-place

Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200115034455.17658-10-pankaj.laxminarayan.bharadiya@intel.com
 2020-01-22 17:54:33 +02:00
Ramalingam C
05e8a5f51e drm/i915: Create dumb buffer from LMEM 
When LMEM is supported, dumb buffer preferred to be created from LMEM.

v2:
  Parameters are reshuffled. [Chris]
v3:
  s/region_id/mem_type
v4:
  use the i915_gem_object_create_region [chris]

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200104191043.2207314-2-chris@chris-wilson.co.uk
 2020-01-05 01:09:18 +00:00
Chris Wilson
4b0dd4a29a drm/i915/selftests: Flush the context worker 
When cleaning up the mock device, remember to flush the context worker
to free the residual GEM contexts before shutting down the device.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/802
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191230165821.3840449-1-chris@chris-wilson.co.uk
 2019-12-30 20:32:06 +00:00
Chris Wilson
76f9764cc3 drm/i915: Introduce a vma.kref 
Start introducing a kref on i915_vma in order to protect the vma unbind
(i915_gem_object_unbind) from a parallel destruction (i915_vma_parked).
Later, we will use the refcount to manage all access and turn i915_vma
into a first class container.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Acked-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222210256.2066451-2-chris@chris-wilson.co.uk
 2019-12-23 12:31:54 +00:00
Chris Wilson
f5af1659d8 drm/i915: Add a simple is-bound check before unbinding 
Only acquire the various atomic references required to unbind the vma if
we do need to unbind the vma.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222210256.2066451-1-chris@chris-wilson.co.uk
 2019-12-23 12:30:23 +00:00
Chris Wilson
e26b6d4341 drm/i915/gt: Pull GT initialisation under intel_gt_init() 
Begin pulling the GT setup underneath a single GT umbrella; let intel_gt
take ownership of its engines! As hinted, the complication is the
lifetime of the probed engine versus the active lifetime of the GT
backends. We need to detect the engine layout early and keep it until
the end so that we can sanitize state on takeover and release.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222120752.1368352-1-chris@chris-wilson.co.uk
 2019-12-22 12:51:32 +00:00
Chris Wilson
78be2c303a drm/i915: Move i915_gem_init_contexts() earlier 
As the GEM global context setup is now independent of the GT state
(although GT does currently still depend upon the global
i915->kernel_context), we can move its init earlier, leaving the gt init
ready to be extracted.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191221200109.1202310-1-chris@chris-wilson.co.uk
 2019-12-21 21:07:01 +00:00
Chris Wilson
e6ba764802 drm/i915: Remove i915->kernel_context 
Allocate only an internal intel_context for the kernel_context, forgoing
a global GEM context for internal use as we only require a separate
address space (for our own protection).

Now having weaned GT from requiring ce->gem_context, we can stop
referencing it entirely. This also means we no longer have to create random
and unnecessary GEM contexts for internal use.

GEM contexts are now entirely for tracking GEM clients, and intel_context
the execution environment on the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191221160324.1073045-1-chris@chris-wilson.co.uk
 2019-12-21 16:37:10 +00:00
Chris Wilson
9f3ccd40ac drm/i915: Drop GEM context as a direct link from i915_request 
Keep the intel_context as being the primary state for i915_request, with
the GEM context a backpointer from the low level state for the rarer
cases we need client information. Our goal is to remove such references
to clients from the backend, and leave the HW submission agnostic to
client interfaces and self-contained.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191220101230.256839-1-chris@chris-wilson.co.uk
 2019-12-20 10:52:21 +00:00
Chris Wilson
da42104f58 drm/i915: Hold reference to intel_frontbuffer as we track activity 
Since obj->frontbuffer is no longer protected by the struct_mutex, as we
are processing the execbuf, it may be removed. Mark the
intel_frontbuffer as rcu protected, and so acquire a reference to
the struct as we track activity upon it.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/827
Fixes: 8e7cb1799b ("drm/i915: Extract intel_frontbuffer active tracking")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v5.4+
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191218104043.3539458-1-chris@chris-wilson.co.uk
 2019-12-18 12:09:57 +00:00
Chris Wilson
16c46fd505 drm/i915/gem: Avoid rcu_barrier() from shrinker paths 
As i915_gem_object_unbind() waits on an rcu_barrier() to flush vm
releases (and destruction of their bound vma), we have to be careful not
to invoke that barrier from beneath the shrinker:

<4> [430.222671] WARNING: possible circular locking dependency detected
<4> [430.222673] 5.4.0-rc8-CI-CI_DRM_7508+ #1 Tainted: G     U
<4> [430.222675] ------------------------------------------------------
<4> [430.222677] gem_pwrite/2317 is trying to acquire lock:
<4> [430.222678] ffffffff82248218 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x23/0x190
<4> [430.222685]
but task is already holding lock:
<4> [430.222687] ffffffff82263a40 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.117+0x0/0x30
<4> [430.222691]
which lock already depends on the new lock.

<4> [430.222693]
the existing dependency chain (in reverse order) is:
<4> [430.222695]
-> #2 (fs_reclaim){+.+.}:
<4> [430.222698]        fs_reclaim_acquire.part.117+0x24/0x30
<4> [430.222702]        kmem_cache_alloc_trace+0x2a/0x2c0
<4> [430.222705]        intel_cpuc_prepare+0x37/0x1a0
<4> [430.222709]        cpuhp_invoke_callback+0x9b/0x9d0
<4> [430.222712]        _cpu_up+0xa2/0x140
<4> [430.222714]        do_cpu_up+0x61/0xa0
<4> [430.222718]        smp_init+0x57/0x96
<4> [430.222722]        kernel_init_freeable+0xac/0x1c7
<4> [430.222725]        kernel_init+0x5/0x100
<4> [430.222728]        ret_from_fork+0x24/0x50
<4> [430.222729]
-> #1 (cpu_hotplug_lock.rw_sem){++++}:
<4> [430.222733]        cpus_read_lock+0x34/0xd0
<4> [430.222734]        rcu_barrier+0xaa/0x190
<4> [430.222736]        kernel_init+0x21/0x100
<4> [430.222737]        ret_from_fork+0x24/0x50
<4> [430.222739]
-> #0 (rcu_state.barrier_mutex){+.+.}:
<4> [430.222742]        __lock_acquire+0x1328/0x15d0
<4> [430.222743]        lock_acquire+0xa7/0x1c0
<4> [430.222746]        __mutex_lock+0x9a/0x9d0
<4> [430.222747]        rcu_barrier+0x23/0x190
<4> [430.222850]        i915_gem_object_unbind+0x264/0x3d0 [i915]
<4> [430.222882]        i915_gem_shrink+0x297/0x5f0 [i915]
<4> [430.222912]        i915_gem_shrink_all+0x38/0x60 [i915]
<4> [430.222934]        i915_drop_caches_set+0x1f0/0x240 [i915]
<4> [430.222938]        simple_attr_write+0xb0/0xd0
<4> [430.222941]        full_proxy_write+0x51/0x80
<4> [430.222943]        vfs_write+0xb9/0x1d0
<4> [430.222944]        ksys_write+0x9f/0xe0
<4> [430.222946]        do_syscall_64+0x4f/0x210
<4> [430.222948]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [430.222950]
other info that might help us debug this:

<4> [430.222952] Chain exists of:
  rcu_state.barrier_mutex --> cpu_hotplug_lock.rw_sem --> fs_reclaim

<4> [430.222955]  Possible unsafe locking scenario:

<4> [430.222957]        CPU0                    CPU1
<4> [430.222958]        ----                    ----
<4> [430.222960]   lock(fs_reclaim);
<4> [430.222961]                                lock(cpu_hotplug_lock.rw_sem);
<4> [430.222963]                                lock(fs_reclaim);
<4> [430.222964]   lock(rcu_state.barrier_mutex);
<4> [430.222966]
 *** DEADLOCK ***

<4> [430.222968] 3 locks held by gem_pwrite/2317:
<4> [430.222969]  #0: ffff88849e2d9408 (sb_writers#14){.+.+}, at: vfs_write+0x1a4/0x1d0
<4> [430.222973]  #1: ffff888496976db0 (&attr->mutex){+.+.}, at: simple_attr_write+0x36/0xd0
<4> [430.222976]  #2: ffffffff82263a40 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.117+0x0/0x30
<4> [430.222980]
stack backtrace:
<4> [430.222982] CPU: 1 PID: 2317 Comm: gem_pwrite Tainted: G     U            5.4.0-rc8-CI-CI_DRM_7508+ #1
<4> [430.222985] Hardware name: Intel Corporation Tiger Lake Client Platform/TigerLake U DDR4 SODIMM RVP, BIOS TGLSFWI1.R00.2321.A08.1909162051 09/16/2019
<4> [430.222989] Call Trace:
<4> [430.222992]  dump_stack+0x71/0x9b
<4> [430.222995]  check_noncircular+0x19b/0x1c0
<4> [430.222998]  ? __lock_acquire+0x1328/0x15d0
<4> [430.222999]  __lock_acquire+0x1328/0x15d0
<4> [430.223001]  ? mark_held_locks+0x49/0x70
<4> [430.223003]  lock_acquire+0xa7/0x1c0
<4> [430.223005]  ? rcu_barrier+0x23/0x190
<4> [430.223008]  __mutex_lock+0x9a/0x9d0
<4> [430.223009]  ? rcu_barrier+0x23/0x190
<4> [430.223011]  ? rcu_barrier+0x23/0x190
<4> [430.223013]  ? find_held_lock+0x2d/0x90
<4> [430.223045]  ? i915_gem_object_unbind+0x24a/0x3d0 [i915]
<4> [430.223048]  ? rcu_barrier+0x23/0x190
<4> [430.223049]  rcu_barrier+0x23/0x190
<4> [430.223081]  i915_gem_object_unbind+0x264/0x3d0 [i915]
<4> [430.223119]  i915_gem_shrink+0x297/0x5f0 [i915]

Closes: https://gitlab.freedesktop.org/drm/intel/issues/743
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191208161252.3015727-1-chris@chris-wilson.co.uk
 2019-12-09 10:49:38 +00:00
Chris Wilson
1a74934b0e drm/i915/gem: Flush the pwrite through the chipset before signaling 
Before we signal the fence to indicate completion, ensure the pwrite
through the indirect GGTT is coherent (as best as we know) in memory.
Any listeners to the fence may start immediately and sample from the
backing store prior to the writes being posted, thus seeing stale data.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191206105527.1130413-1-chris@chris-wilson.co.uk
 2019-12-06 11:39:12 +00:00
Chris Wilson
5c4fe63aba drm/i915/gem: Reinitialise the local list before repeating 
As we may start the loop again, we require our local list of i915_vma
we've processed to be reinitialised.

Fixes: aa5e4453dc ("drm/i915/gem: Try to flush pending unbind events")
Closes: https://gitlab.freedesktop.org/drm/intel/issues/731
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191205132912.606868-1-chris@chris-wilson.co.uk
 2019-12-05 14:37:25 +00:00
Chris Wilson
aa5e4453dc drm/i915/gem: Try to flush pending unbind events 
If we cannot handle a vma within the unbind loop, try to flush the
pending events (i915_vma_parked, i915_vm_release) and try again. This
avoids a round trip to userspace that is not guaranteed to make forward
progress, as the events we wait upon require being idle.

References: cb6c3d45f9 ("drm/i915/gem: Avoid parking the vma as we unbind")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191204123556.3740002-1-chris@chris-wilson.co.uk
 2019-12-04 17:30:31 +00:00
Abdiel Janulgue
cc662126b4 drm/i915: Introduce DRM_I915_GEM_MMAP_OFFSET 
This is really just an alias of mmap_gtt. The 'mmap offset' nomenclature
comes from the value returned by this ioctl which is the offset into the
device fd which userpace uses with mmap(2).

mmap_gtt was our initial mmap_offset implementation, this extends
our CPU mmap support to allow additional fault handlers that depends on
the object's backing pages.

Note that we multiplex mmap_gtt and mmap_offset through the same ioctl,
and use the zero extending behaviour of drm to differentiate between
them, when we inspect the flags.

To support multiple mmap types on an object we need to support multiple
mmap_offsets for an object (each offset in the global device address
space corresponding to a unique instance of the object for a file + mmap
type). As we drop the simplified drm core idea of a single mmap_offset,
we need to provide replacement hooks for the dumb mmap interface as
well.

Link: https://gitlab.freedesktop.org/mesa/mesa/merge_requests/1675
Testcase: igt/gem_mmap_offset
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191204120032.3682839-1-chris@chris-wilson.co.uk
 2019-12-04 15:11:44 +00:00
Chris Wilson
cb6c3d45f9 drm/i915/gem: Avoid parking the vma as we unbind 
In order to avoid keeping a reference on the i915_vma (which is long
overdue!) we have to coordinate all the possible lifetimes and only use
the vma while we know it is alive. In this episode, we are reminded that
while idle, the closed vma are destroyed. So if the GT idles while we are
working with the vma, the vma itself becomes invalid.

First class i915_vma here we come, but in the meantime keep piling on
the straw.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203155032.3137263-1-chris@chris-wilson.co.uk
 2019-12-03 20:41:34 +00:00
Chris Wilson
42d1051130 drm/i915: Lift i915_vma_pin() out of intel_renderstate_emit() 
Once inside a request, inside the timeline->mutex, pinning is verboten.

<4> [896.032829] ======================================================
<4> [896.032831] WARNING: possible circular locking dependency detected
<4> [896.032835] 5.4.0-rc8-CI-Patchwork_15533+ #1 Tainted: G     U
<4> [896.032838] ------------------------------------------------------
<4> [896.032841] gem_exec_parall/3720 is trying to acquire lock:
<4> [896.032844] ffff888401863270 (&kernel#2){+.+.}, at: i915_request_create+0x16/0x1c0 [i915]
<4> [896.032915]
but task is already holding lock:
<4> [896.032917] ffff8883ec1c93c0 (&vm->mutex){+.+.}, at: i915_vma_pin+0xf3/0x11c0 [i915]
<4> [896.032952]
which lock already depends on the new lock.

<4> [896.032954]
the existing dependency chain (in reverse order) is:
<4> [896.032956]
-> #1 (&vm->mutex){+.+.}:
<4> [896.032961]        __mutex_lock+0x9a/0x9d0
<4> [896.032995]        i915_vma_pin+0xf3/0x11c0 [i915]
<4> [896.033033]        intel_renderstate_emit+0xb9/0x9e0 [i915]
<4> [896.033081]        i915_gem_init+0x5a9/0xa50 [i915]
<4> [896.033112]        i915_driver_probe+0xb00/0x15f0 [i915]
<4> [896.033144]        i915_pci_probe+0x43/0x1c0 [i915]
<4> [896.033149]        pci_device_probe+0x9e/0x120
<4> [896.033154]        really_probe+0xea/0x420
<4> [896.033158]        driver_probe_device+0x10b/0x120
<4> [896.033161]        device_driver_attach+0x4a/0x50
<4> [896.033164]        __driver_attach+0x97/0x130
<4> [896.033168]        bus_for_each_dev+0x74/0xc0
<4> [896.033171]        bus_add_driver+0x142/0x220
<4> [896.033174]        driver_register+0x56/0xf0
<4> [896.033178]        do_one_initcall+0x58/0x2ff
<4> [896.033183]        do_init_module+0x56/0x1f8
<4> [896.033187]        load_module+0x243e/0x29f0
<4> [896.033190]        __do_sys_finit_module+0xe9/0x110
<4> [896.033194]        do_syscall_64+0x4f/0x210
<4> [896.033197]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [896.033200]
-> #0 (&kernel#2){+.+.}:
<4> [896.033206]        __lock_acquire+0x1328/0x15d0
<4> [896.033209]        lock_acquire+0xa7/0x1c0
<4> [896.033213]        __mutex_lock+0x9a/0x9d0
<4> [896.033255]        i915_request_create+0x16/0x1c0 [i915]
<4> [896.033287]        intel_engine_flush_barriers+0x4c/0x100 [i915]
<4> [896.033327]        ggtt_flush+0x37/0x60 [i915]
<4> [896.033366]        i915_gem_evict_something+0x46b/0x5a0 [i915]
<4> [896.033407]        i915_gem_gtt_insert+0x21d/0x6a0 [i915]
<4> [896.033449]        i915_vma_pin+0xb36/0x11c0 [i915]
<4> [896.033488]        gen6_ppgtt_pin+0xd5/0x170 [i915]
<4> [896.033523]        ring_context_pin+0x2e/0xc0 [i915]
<4> [896.033554]        __intel_context_do_pin+0x6b/0x190 [i915]
<4> [896.033591]        i915_gem_do_execbuffer+0x1814/0x26c0 [i915]
<4> [896.033627]        i915_gem_execbuffer2_ioctl+0x11b/0x460 [i915]
<4> [896.033632]        drm_ioctl_kernel+0xa7/0xf0
<4> [896.033635]        drm_ioctl+0x2e1/0x390
<4> [896.033638]        do_vfs_ioctl+0xa0/0x6f0
<4> [896.033641]        ksys_ioctl+0x35/0x60
<4> [896.033644]        __x64_sys_ioctl+0x11/0x20
<4> [896.033647]        do_syscall_64+0x4f/0x210
<4> [896.033650]        entry_SYSCALL_64_after_hwframe+0x49/0xbe

Lift the object allocation and pin prior to the request construction.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191202204316.2665847-1-chris@chris-wilson.co.uk
 2019-12-03 13:23:00 +00:00
Chris Wilson
3e817471a3 drm/i915/gem: Take runtime-pm wakeref prior to unbinding 
Some machines require ACPI for runtime resume, and ACPI is quite kmalloc
happy. We cannot handle kmalloc from inside the vm->mutex, as they are
used by the shrinker, and so we must ensure the global runtime-pm is
awake prior to unbinding to avoid the potential inversion.

<4> [57.121748] ======================================================
<4> [57.121750] WARNING: possible circular locking dependency detected
<4> [57.121753] 5.4.0-rc8-CI-CI_DRM_7466+ #1 Tainted: G     U
<4> [57.121754] ------------------------------------------------------
<4> [57.121756] i915_pm_rpm/1105 is trying to acquire lock:
<4> [57.121758] ffffffff82263a40 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.117+0x0/0x30
<4> [57.121766]
but task is already holding lock:
<4> [57.121768] ffff888475a593c0 (&vm->mutex){+.+.}, at: i915_vma_unbind+0x21/0x50 [i915]
<4> [57.121868]
which lock already depends on the new lock.

<4> [57.121869]
the existing dependency chain (in reverse order) is:
<4> [57.121871]
-> #1 (&vm->mutex){+.+.}:
<4> [57.121951]        i915_gem_shrinker_taints_mutex+0xa2/0xd0 [i915]
<4> [57.122028]        i915_address_space_init+0xa9/0x170 [i915]
<4> [57.122104]        i915_ggtt_init_hw+0x47/0x130 [i915]
<4> [57.122150]        i915_driver_probe+0xbb4/0x15f0 [i915]
<4> [57.122197]        i915_pci_probe+0x43/0x1c0 [i915]
<4> [57.122202]        pci_device_probe+0x9e/0x120
<4> [57.122206]        really_probe+0xea/0x420
<4> [57.122209]        driver_probe_device+0x10b/0x120
<4> [57.122212]        device_driver_attach+0x4a/0x50
<4> [57.122214]        __driver_attach+0x97/0x130
<4> [57.122217]        bus_for_each_dev+0x74/0xc0
<4> [57.122220]        bus_add_driver+0x142/0x220
<4> [57.122222]        driver_register+0x56/0xf0
<4> [57.122226]        do_one_initcall+0x58/0x2ff
<4> [57.122230]        do_init_module+0x56/0x1f8
<4> [57.122233]        load_module+0x243e/0x29f0
<4> [57.122236]        __do_sys_finit_module+0xe9/0x110
<4> [57.122239]        do_syscall_64+0x4f/0x210
<4> [57.122242]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [57.122244]
-> #0 (fs_reclaim){+.+.}:
<4> [57.122249]        __lock_acquire+0x1328/0x15d0
<4> [57.122251]        lock_acquire+0xa7/0x1c0
<4> [57.122254]        fs_reclaim_acquire.part.117+0x24/0x30
<4> [57.122257]        __kmalloc+0x48/0x320
<4> [57.122261]        acpi_ns_internalize_name+0x44/0x9b
<4> [57.122264]        acpi_ns_get_node_unlocked+0x6b/0xd3
<4> [57.122267]        acpi_ns_get_node+0x3b/0x50
<4> [57.122271]        acpi_get_handle+0x8a/0xb4
<4> [57.122274]        acpi_has_method+0x1c/0x40
<4> [57.122278]        acpi_pci_set_power_state+0x40/0xe0
<4> [57.122281]        pci_platform_power_transition+0x3e/0x90
<4> [57.122284]        pci_set_power_state+0x83/0xf0
<4> [57.122287]        pci_restore_standard_config+0x22/0x40
<4> [57.122289]        pci_pm_runtime_resume+0x23/0xc0
<4> [57.122293]        __rpm_callback+0xb1/0x110
<4> [57.122296]        rpm_callback+0x1a/0x70
<4> [57.122299]        rpm_resume+0x50e/0x790
<4> [57.122302]        __pm_runtime_resume+0x42/0x80
<4> [57.122357]        __intel_runtime_pm_get+0x15/0x60 [i915]
<4> [57.122435]        ggtt_unbind_vma+0x24/0x60 [i915]
<4> [57.122514]        __i915_vma_unbind.part.39+0xb5/0x500 [i915]
<4> [57.122593]        i915_vma_unbind+0x2d/0x50 [i915]
<4> [57.122668]        i915_gem_object_unbind+0x11c/0x260 [i915]
<4> [57.122740]        i915_gem_object_set_cache_level+0x32/0x90 [i915]
<4> [57.122810]        i915_gem_set_caching_ioctl+0x1f7/0x2f0 [i915]
<4> [57.122815]        drm_ioctl_kernel+0xa7/0xf0
<4> [57.122818]        drm_ioctl+0x2e1/0x390
<4> [57.122822]        do_vfs_ioctl+0xa0/0x6f0
<4> [57.122825]        ksys_ioctl+0x35/0x60
<4> [57.122828]        __x64_sys_ioctl+0x11/0x20
<4> [57.122830]        do_syscall_64+0x4f/0x210
<4> [57.122833]        entry_SYSCALL_64_after_hwframe+0x49/0xbe

Closes: https://gitlab.freedesktop.org/drm/intel/issues/711
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203101347.2836057-1-chris@chris-wilson.co.uk
 2019-12-03 13:09:53 +00:00
Chris Wilson
2d0fb25136 drm/i915: Serialise with remote retirement 
Since retirement may be running in a worker on another CPU, it may be
skipped in the local intel_gt_wait_for_idle(). To ensure the state is
consistent for our sanity checks upon load, serialise with the remote
retirer by waiting on the timeline->mutex.

Outside of this use case, e.g. on suspend or module unload, we expect the
slack to be picked up by intel_gt_pm_wait_for_idle() and so prefer to
put the special case serialisation with retirement in its single user,
for now at least.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191121071044.97798-2-chris@chris-wilson.co.uk
 2019-11-21 11:53:55 +00:00
Chris Wilson
b291ce0a16 drm/i915/gem: Purge the sudden reappearance of i915_gem_object_pin() 
This died many years ago as we now use i915_vma first and foremost.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191115170835.1367869-1-chris@chris-wilson.co.uk
 2019-11-15 21:32:18 +00:00
Jani Nikula
e205ceeb25 Merge drm/drm-next into drm-intel-next-queued 
Backmerge to get dfce90259d ("Backmerge i915 security patches from
commit 'ea0b163b13ff' into drm-next") and thus 100d46bd72 ("Merge
Intel Gen8/Gen9 graphics fixes from Jon Bloomfield.").

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
 2019-11-15 13:17:39 +02:00
Dave Airlie
dfce90259d Backmerge i915 security patches from commit 'ea0b163b13ff' into drm-next 
This backmerges the branch that ended up in Linus' tree. It removes
all the changes for the rc6 patches from Linus' tree in favour of
a patch that is based on a large refactor that occured.

Otherwise it all looks good.

Signed-off-by: Dave Airlie <airlied@redhat.com>
 2019-11-14 11:09:06 +10:00
Jon Bloomfield
4f7af1948a drm/i915: Support ro ppgtt mapped cmdparser shadow buffers 
For Gen7, the original cmdparser motive was to permit limited
use of register read/write instructions in unprivileged BB's.
This worked by copying the user supplied bb to a kmd owned
bb, and running it in secure mode, from the ggtt, only if
the scanner finds no unsafe commands or registers.

For Gen8+ we can't use this same technique because running bb's
from the ggtt also disables access to ppgtt space. But we also
do not actually require 'secure' execution since we are only
trying to reduce the available command/register set. Instead we
will copy the user buffer to a kmd owned read-only bb in ppgtt,
and run in the usual non-secure mode.

Note that ro pages are only supported by ppgtt (not ggtt), but
luckily that's exactly what we need.

Add the required paths to map the shadow buffer to ppgtt ro for Gen8+

v2: IS_GEN7/IS_GEN (Mika)
v3: rebase
v4: rebase
v5: rebase

Signed-off-by: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris.p.wilson@intel.com>
 2019-11-05 11:37:54 -08:00
Chris Wilson
fd6fe087ca drm/i915/gt: Call intel_gt_sanitize() directly 
Assume all responsibility for operating on the HW to sanitize the GT
state upon load/resume in intel_gt_sanitize() itself.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191101141009.15581-1-chris@chris-wilson.co.uk
(cherry picked from commit 797a615357)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
 2019-11-05 16:04:16 +02:00
Chris Wilson
797a615357 drm/i915/gt: Call intel_gt_sanitize() directly 
Assume all responsibility for operating on the HW to sanitize the GT
state upon load/resume in intel_gt_sanitize() itself.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191101141009.15581-1-chris@chris-wilson.co.uk
 2019-11-01 14:47:36 +00:00
Chris Wilson
4605bb73a8 drm/i915/gt: Pull timeline initialise to intel_gt_init_early 
Our timelines are currently contained within an intel_gt, and we only
need to perform list/spinlock initialisation, so we can pull the
intel_timelines_init() into our intel_gt_init_early().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191101130406.4142-1-chris@chris-wilson.co.uk
 2019-11-01 14:47:36 +00:00
Janusz Krzysztofik
dd6e38dfc1 drm/i915: Fix i915_inject_load_error() name to read *_probe_* 
Commit 50d84418f5 ("drm/i915: Add i915 to i915_inject_probe_failure")
introduced new functions unfortunately named incompatibly with rules
established by commit f2db53f14d ("drm/i915: Replace "_load" with
"_probe" consequently").  Fix it for consistency.

Suggested-by: Michał Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Cc: Michał Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski@intel.com>
Cc: Tomasz Lis <tomasz.lis@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029102036.6326-2-janusz.krzysztofik@linux.intel.com
 2019-10-29 15:37:57 +00:00
Andi Shyti
3e7abf8141 drm/i915: Extract GT render power state management 
i915_irq.c is large. One reason for this is that has a large chunk of
the GT render power management stashed away in it. Extract that logic
out of i915_irq.c and intel_pm.c and put it under one roof.

Based on a patch by Chris Wilson.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024211642.7688-1-chris@chris-wilson.co.uk
 2019-10-26 19:28:59 +01:00
Chris Wilson
ae2e28b026 drm/i915: Teach record_defaults to operate on the intel_gt 
Again we wish to operate on the engines, which are owned by the
intel_gt. As such it is easier, and much more consistent, to pass the
intel_gt parameter.

v2: Unexport i915_gem_load_power_context()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022141935.15733-1-chris@chris-wilson.co.uk
 2019-10-22 20:43:07 +01:00
Tvrtko Ursulin
7f63aa2352 drm/i915: Pass intel_gt to intel_engines_verify_workarounds 
Engines belong to the GT so make it indicative in the API.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022094726.3001-7-tvrtko.ursulin@linux.intel.com
 2019-10-22 12:16:42 +01:00
Tvrtko Ursulin
7841fcbdfb drm/i915: Pass intel_gt to intel_engines_init 
Engines belong to the GT so make it indicative in the API.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022094726.3001-6-tvrtko.ursulin@linux.intel.com
 2019-10-22 12:16:42 +01:00
Tvrtko Ursulin
78f606033b drm/i915: Pass intel_gt to intel_engines_setup 
Engines belong to the GT so make it indicative in the API.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022094726.3001-5-tvrtko.ursulin@linux.intel.com
 2019-10-22 12:16:42 +01:00
Tvrtko Ursulin
b0258bf242 drm/i915: Pass intel_gt to intel_engines_cleanup 
Engines belong to the GT so make it indicative in the API.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022094726.3001-4-tvrtko.ursulin@linux.intel.com
 2019-10-22 12:16:42 +01:00
Chris Wilson
18f3b2727f drm/i915: Remove pm park/unpark notifications 
With the last user, i915_vma_parked(), retired, there are no more users
of the per-gt pm notifications and we can remove the unused
infrastructure.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191021183236.21790-2-chris@chris-wilson.co.uk
 2019-10-21 21:07:57 +01:00
Matthew Auld
da1184cd41 drm/i915: treat shmem as a region 
Convert shmem to an intel_memory_region.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191018090751.28295-2-matthew.auld@intel.com
 2019-10-18 12:41:03 +01:00
Chris Wilson
e9d4c9245f drm/i915: Store i915_ggtt as the backpointer on fence registers 
Now that i915_ggtt knows everything about its own paths to perform mmio,
we can use that as our primary backpointer for individual fence
registers. This reduces the amount of pointer dancing we have to perform
on the common paths, but more importantly finishes our fence register
encapsulation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191016143234.4075-1-chris@chris-wilson.co.uk
 2019-10-16 19:41:36 +01:00
Chris Wilson
eca0b72089 drm/i915: Do initial mocs configuration directly 
Now that we record the default "goldenstate" context, we do not need to
emit the mocs registers at the start of each context and can simply do
mmio before the first context and capture the registers as part of its
default image. As a consequence, this means that we repeat the mmio
after each engine reset, fixing up any platform and registers that were
zapped by the reset (for those platforms with global not context-saved
settings).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111723
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111645
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Prathap Kumar Valsan <prathap.kumar.valsan@intel.com>
Reviewed-by: Prathap Kumar Valsan <prathap.kumar.valsan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191016090749.7092-1-chris@chris-wilson.co.uk
 2019-10-16 19:35:37 +01:00
Chris Wilson
4f2a572eda drm/i915/userptr: Never allow userptr into the mappable GGTT 
Daniel Vetter uncovered a nasty cycle in using the mmu-notifiers to
invalidate userptr objects which also happen to be pulled into GGTT
mmaps. That is when we unbind the userptr object (on mmu invalidation),
we revoke all CPU mmaps, which may then recurse into mmu invalidation.

We looked for ways of breaking the cycle, but the revocation on
invalidation is required and cannot be avoided. The only solution we
could see was to not allow such GGTT bindings of userptr objects in the
first place. In practice, no one really wants to use a GGTT mmapping of
a CPU pointer...

Just before Daniel's explosive lockdep patches land in v5.4-rc1, we got
a genuine blip from CI:

<4>[  246.793958] ======================================================
<4>[  246.793972] WARNING: possible circular locking dependency detected
<4>[  246.793989] 5.3.0-gbd6c56f50d15-drmtip_372+ #1 Tainted: G     U
<4>[  246.794003] ------------------------------------------------------
<4>[  246.794017] kswapd0/145 is trying to acquire lock:
<4>[  246.794030] 000000003f565be6 (&dev->struct_mutex/1){+.+.}, at: userptr_mn_invalidate_range_start+0x18f/0x220 [i915]
<4>[  246.794250]
                  but task is already holding lock:
<4>[  246.794263] 000000001799cef9 (&anon_vma->rwsem){++++}, at: page_lock_anon_vma_read+0xe6/0x2a0
<4>[  246.794291]
                  which lock already depends on the new lock.

<4>[  246.794307]
                  the existing dependency chain (in reverse order) is:
<4>[  246.794322]
                  -> #3 (&anon_vma->rwsem){++++}:
<4>[  246.794344]        down_write+0x33/0x70
<4>[  246.794357]        __vma_adjust+0x3d9/0x7b0
<4>[  246.794370]        __split_vma+0x16a/0x180
<4>[  246.794385]        mprotect_fixup+0x2a5/0x320
<4>[  246.794399]        do_mprotect_pkey+0x208/0x2e0
<4>[  246.794413]        __x64_sys_mprotect+0x16/0x20
<4>[  246.794429]        do_syscall_64+0x55/0x1c0
<4>[  246.794443]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[  246.794456]
                  -> #2 (&mapping->i_mmap_rwsem){++++}:
<4>[  246.794478]        down_write+0x33/0x70
<4>[  246.794493]        unmap_mapping_pages+0x48/0x130
<4>[  246.794519]        i915_vma_revoke_mmap+0x81/0x1b0 [i915]
<4>[  246.794519]        i915_vma_unbind+0x11d/0x4a0 [i915]
<4>[  246.794519]        i915_vma_destroy+0x31/0x300 [i915]
<4>[  246.794519]        __i915_gem_free_objects+0xb8/0x4b0 [i915]
<4>[  246.794519]        drm_file_free.part.0+0x1e6/0x290
<4>[  246.794519]        drm_release+0xa6/0xe0
<4>[  246.794519]        __fput+0xc2/0x250
<4>[  246.794519]        task_work_run+0x82/0xb0
<4>[  246.794519]        do_exit+0x35b/0xdb0
<4>[  246.794519]        do_group_exit+0x34/0xb0
<4>[  246.794519]        __x64_sys_exit_group+0xf/0x10
<4>[  246.794519]        do_syscall_64+0x55/0x1c0
<4>[  246.794519]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[  246.794519]
                  -> #1 (&vm->mutex){+.+.}:
<4>[  246.794519]        i915_gem_shrinker_taints_mutex+0x6d/0xe0 [i915]
<4>[  246.794519]        i915_address_space_init+0x9f/0x160 [i915]
<4>[  246.794519]        i915_ggtt_init_hw+0x55/0x170 [i915]
<4>[  246.794519]        i915_driver_probe+0xc9f/0x1620 [i915]
<4>[  246.794519]        i915_pci_probe+0x43/0x1b0 [i915]
<4>[  246.794519]        pci_device_probe+0x9e/0x120
<4>[  246.794519]        really_probe+0xea/0x3d0
<4>[  246.794519]        driver_probe_device+0x10b/0x120
<4>[  246.794519]        device_driver_attach+0x4a/0x50
<4>[  246.794519]        __driver_attach+0x97/0x130
<4>[  246.794519]        bus_for_each_dev+0x74/0xc0
<4>[  246.794519]        bus_add_driver+0x13f/0x210
<4>[  246.794519]        driver_register+0x56/0xe0
<4>[  246.794519]        do_one_initcall+0x58/0x300
<4>[  246.794519]        do_init_module+0x56/0x1f6
<4>[  246.794519]        load_module+0x25bd/0x2a40
<4>[  246.794519]        __se_sys_finit_module+0xd3/0xf0
<4>[  246.794519]        do_syscall_64+0x55/0x1c0
<4>[  246.794519]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[  246.794519]
                  -> #0 (&dev->struct_mutex/1){+.+.}:
<4>[  246.794519]        __lock_acquire+0x15d8/0x1e90
<4>[  246.794519]        lock_acquire+0xa6/0x1c0
<4>[  246.794519]        __mutex_lock+0x9d/0x9b0
<4>[  246.794519]        userptr_mn_invalidate_range_start+0x18f/0x220 [i915]
<4>[  246.794519]        __mmu_notifier_invalidate_range_start+0x85/0x110
<4>[  246.794519]        try_to_unmap_one+0x76b/0x860
<4>[  246.794519]        rmap_walk_anon+0x104/0x280
<4>[  246.794519]        try_to_unmap+0xc0/0xf0
<4>[  246.794519]        shrink_page_list+0x561/0xc10
<4>[  246.794519]        shrink_inactive_list+0x220/0x440
<4>[  246.794519]        shrink_node_memcg+0x36e/0x740
<4>[  246.794519]        shrink_node+0xcb/0x490
<4>[  246.794519]        balance_pgdat+0x241/0x580
<4>[  246.794519]        kswapd+0x16c/0x530
<4>[  246.794519]        kthread+0x119/0x130
<4>[  246.794519]        ret_from_fork+0x24/0x50
<4>[  246.794519]
                  other info that might help us debug this:

<4>[  246.794519] Chain exists of:
                    &dev->struct_mutex/1 --> &mapping->i_mmap_rwsem --> &anon_vma->rwsem

<4>[  246.794519]  Possible unsafe locking scenario:

<4>[  246.794519]        CPU0                    CPU1
<4>[  246.794519]        ----                    ----
<4>[  246.794519]   lock(&anon_vma->rwsem);
<4>[  246.794519]                                lock(&mapping->i_mmap_rwsem);
<4>[  246.794519]                                lock(&anon_vma->rwsem);
<4>[  246.794519]   lock(&dev->struct_mutex/1);
<4>[  246.794519]
                   *** DEADLOCK ***

v2: Say no to mmap_ioctl

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111744
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111870
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190928082546.3473-1-chris@chris-wilson.co.uk
(cherry picked from commit a4311745bb)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
 2019-10-16 10:56:50 -07:00
Dave Airlie
7ed093602e Merge tag 'drm-misc-next-2019-10-09-2' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 
drm-misc-next for 5.5:

UAPI Changes:
-Colorspace: Expose different prop values for DP vs. HDMI (Gwan-gyeong Mun)
-fourcc: Add DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED (Raymond)
-not_actually: s/ENOTSUPP/EOPNOTSUPP/ in drm_edid and drm_mipi_dbi. This should
    not reach userspace, but adding here to specifically call that out (Daniel)
-i810: Prevent underflow in dispatch ioctls (Dan)
-komeda: Add ACLK sysfs attribute (Mihail)
-v3d: Allow userspace to clean up after render jobs (Iago)

Cross-subsystem Changes:
-MAINTAINERS:
 -Add Alyssa & Steven as panfrost reviewers (Rob)
 -Add Jernej as DE2 reviewer (Maxime)
 -Add Chen-Yu as Allwinner maintainer (Maxime)
-staging: Make some stack arrays static const (Colin)

Core Changes:
-ttm: Allow drivers to specify their vma manager (to use gem mgr) (Gerd)
-docs: Various fixes in connector/encoder/bridge docs (Daniel, Lyude, Laurent)
-connector: Allow more than 3 possible encoders for a connector (José)
-dp_cec: Allow a connector to be associated with a cec device (Dariusz)
-various: Fix some compile/sparse warnings (Ville)
-mm: Ensure mm node removals are properly serialised (Chris)
-panel: Specify the type of panel for drm_panels for later use (Laurent)
-panel: Use drm_panel_init to init device and funcs (Laurent)
-mst: Refactors and cleanups in anticipation of suspend/resume support (Lyude)
-vram:
 -Add lazy unmapping for gem bo's (Thomas)
 -Unify and rationalize vram mm and gem vram (Thomas)
 -Expose vmap and vunmap for gem vram objects (Thomas)
 -Allow objects to be pinned at the top of vram to avoid fragmentation (Thomas)

Driver Changes:
-various: Include drm_bridge.h instead of relying on drm_crtc.h (Boris)
-ast/mgag200: Refactor show_cursor(), move cursor to top of video mem (Thomas)
-komeda:
 -Add error event printing (behind CONFIG) and reg dump support (Lowry)
 -Add suspend/resume support (Lowry)
 -Workaround D71 shadow registers not flushing on disable (Lowry)
-meson: Add suspend/resume support (Neil)
-omap: Miscellaneous refactors and improvements (Tomi/Jyri)
-panfrost/shmem: Silence lockdep by using mutex_trylock (Rob)
-panfrost: Miscellaneous small fixes (Rob/Steven)
-sti: Fix warnings (Benjamin/Linus)
-sun4i:
 -Add vcc-dsi regulator to sun6i_mipi_dsi (Jagan)
 -A few patches to figure out the DRQ/start delay calc on dsi (Jagan/Icenowy)
-virtio:
 -Add module param to switch resource reuse workaround on/off (Gerd)
 -Avoid calling vmexit while holding spinlock (Gerd)
 -Use gem shmem helpers instead of ttm (Gerd)
 -Accommodate command buffer allocations too big for cma (David)

Cc: Rob Herring <robh@kernel.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Dariusz Marcinkiewicz <darekm@google.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Raymond Smith <raymond.smith@arm.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mihail Atanassov <Mihail.Atanassov@arm.com>
Cc: Lowry Li <Lowry.Li@arm.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jyri Sarha <jsarha@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Iago Toral Quiroga <itoral@igalia.com>
Cc: David Riley <davidriley@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

# gpg: Signature made Thu 10 Oct 2019 01:00:47 AM AEST
# gpg:                using RSA key 732C002572DCAF79
# gpg: Can't check signature: public key not found

# Conflicts:
#	drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
#	drivers/gpu/drm/i915/i915_drv.c
#	drivers/gpu/drm/i915/i915_gem.c
#	drivers/gpu/drm/i915/i915_gem_gtt.c
#	drivers/gpu/drm/i915/i915_vma.c
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20191009150825.GA227673@art_vandelay
 2019-10-11 09:30:53 +10:00
Chris Wilson
7842793330 drm/i915: Drop struct_mutex from around GEM initialisation 
We no longer need to placate lockdep by holding struct_mutex for our
initialisation, so don't.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004134015.13204-21-chris@chris-wilson.co.uk
 2019-10-04 15:39:43 +01:00