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42 Commits

Author SHA1 Message Date
Chris Wilson
ebfa7944d6 drm/i915/selftests: Constrain mock_gtt tests to fit within RAM 
Be pessimistic and presume that we actually allocate every page we
exercise via the mock_gtt (e.g. for gvt). In which case we have to keep
our working set under the available physical memory to prevent oom.

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/20180710080424.7821-1-chris@chris-wilson.co.uk
 2018-07-10 09:53:41 +01:00
Chris Wilson
207b700050 drm/i915/selftests: Limit live_gtt allocation test to fit within RAM 
Limit the GTT size we try and allocate to ensure that it fits within RAM
and does not trigger the oomkiller indiscriminately.

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/20180706125338.24432-1-chris@chris-wilson.co.uk
 2018-07-06 16:44:59 +01:00
Chris Wilson
eae4c94453 drm/i915/selftests: Use full release for local ppgtt allocation 
We can now use the full release mechanism (i915_ppgtt_put) for our local
ppgtt allocation in igt_ppgtt_alloc.

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/20180705065653.20449-2-chris@chris-wilson.co.uk
 2018-07-05 11:19:23 +01:00
Chris Wilson
63fd659fb1 drm/i915/gtt: Pull global wc page stash under its own locking 
Currently, the wc-stash used for providing flushed WC pages ready for
constructing the page directories is assumed to be protected by the
struct_mutex. However, we want to remove this global lock and so must
install a replacement global lock for accessing the global wc-stash (the
per-vm stash continues to be guarded by the vm).

We need to push ahead on this patch due to an oversight in hastily
removing the struct_mutex guard around the igt_ppgtt_alloc selftest. No
matter, it will prove very useful (i.e. will be required) in the near
future.

v2: Restore the onstack stash so that we can drop the vm->mutex in
future across the allocation.
v3: Restore the lost pagevec_init of the onstack allocation, and repaint
function names.
v4: Reorder init so that we don't try and use i915_address_space before
it is ininitialised.

Fixes: 1f6f00238a ("drm/i915/selftests: Drop struct_mutex around lowlevel pggtt allocation")
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/20180704185518.4193-1-chris@chris-wilson.co.uk
 2018-07-04 21:23:11 +01:00
Chris Wilson
1f6f00238a drm/i915/selftests: Drop struct_mutex around lowlevel pggtt allocation 
For a ppgtt that we are constructing, there is no struct_mutex
dependence so skip it. In the process, also ping the scheduler
frequently to try and avoid the NMI watchdog.

v2: gen6 requires struct_mutex to clean up (currently)

Suggested-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=107094
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/20180703135331.12265-1-chris@chris-wilson.co.uk
 2018-07-03 22:09:22 +01:00
Chris Wilson
38b7fb0b2a drm/i915/selftests: Release the struct_mutex to free the objects 
live_gtt is a very slow test to run, simply because it tries to allocate
and use as much as the 48b address space as possibly can and in the
process will try to own all of the system memory. This leads to resource
exhaustion and CPU starvation; the latter impacts us when the NMI
watchdog declares a task hung due to a mutex contention with ourselves.
This we can prevent by releasing the struct_mutex and forcing our
i915/rcu workers to run, and in particular flushing the freed object
worker that is the cause for concern.

References: https://bugs.freedesktop.org/show_bug.cgi?id=107094
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/20180703101829.7360-1-chris@chris-wilson.co.uk
 2018-07-03 22:02:36 +01:00
Thomas Zimmermann
a24362ead9 drm/i915: Replace drm_dev_unref with drm_dev_put 
This patch unifies the naming of DRM functions for reference counting
of struct drm_device. The resulting code is more aligned with the rest
of the Linux kernel interfaces.

Signed-off-by: Thomas Zimmermann <tdz@users.sourceforge.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180618110154.30462-6-tdz@users.sourceforge.net
 2018-06-28 19:09:46 +02:00
Chris Wilson
35ac40d8b6 drm/i915/gtt: Subclass gen6_hw_ppgtt 
The legacy gen6 ppgtt needs a little more hand holding than gen8+, and
so requires a larger structure. As I intend to make this slightly more
complicated in the future, separate the gen6 from the core gen8 hw
struct by subclassing. This patch moves the gen6 only features out to
gen6_hw_ppgtt and pipes the new type everywhere that needs it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180612081815.3585-1-chris@chris-wilson.co.uk
 2018-06-12 12:57:17 +01:00
Chris Wilson
17f297b427 drm/i915/gtt: Push allocation to hw ppgtt constructor 
In the next patch, we will subclass the gen6 hw_ppgtt. In order, for the
two different generations of hw ppgtt stucts to be of different size,
push the allocation down to the constructor.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180607163040.9781-1-chris@chris-wilson.co.uk
 2018-06-07 21:53:13 +01:00
Chris Wilson
82ad6443a5 drm/i915/gtt: Rename i915_hw_ppgtt base member 
In the near future, I want to subclass gen6_hw_ppgtt as it contains a
few specialised members and I wish to add more. To avoid the ugliness of
using ppgtt->base.base, rename the i915_hw_ppgtt base member
(i915_address_space) as vm, which is our common shorthand for an
i915_address_space local.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180605153758.18422-1-chris@chris-wilson.co.uk
 2018-06-05 21:11:20 +01:00
Christian König
c0a51fd07b drm: move read_domains and write_domain into i915 
i915 is the only driver using those fields in the drm_gem_object
structure, so they only waste memory for all other drivers.

Move the fields into drm_i915_gem_object instead and patch the i915 code
with the following sed commands:

sed -i "s/obj->base.read_domains/obj->read_domains/g" drivers/gpu/drm/i915/*.c drivers/gpu/drm/i915/*/*.c
sed -i "s/obj->base.write_domain/obj->write_domain/g" drivers/gpu/drm/i915/*.c drivers/gpu/drm/i915/*/*.c

Change is only compile tested.

v2: move fields around as suggested by Chris.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180216124338.9087-1-christian.koenig@amd.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2018-02-16 14:12:48 +00:00
Gustavo A. R. Silva
6e8c06d291 drm/i915/selftests: fix inconsistent IS_ERR and PTR_ERR 
Fix inconsistent IS_ERR and PTR_ERR in shrink_boom.
The proper pointer to use is _explode_ instead of _purge_.

This issue was detected with the help of Coccinelle.

Fixes: fe215c8bc4 ("drm/i915/selftests: add missing gtt shrinker test")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214211234.GA22341@embeddedgus
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2018-02-15 16:33:30 +00:00
Matthew Auld
fe215c8bc4 drm/i915/selftests: add missing gtt shrinker test 
Try to catch a bug we've seen in the wild where the shrinker purges the
pd/pdp from under us while allocating our paging structures.

References: https://bugs.freedesktop.org/show_bug.cgi?id=104773
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180131191453.12676-1-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/20180131214440.7141-2-chris@chris-wilson.co.uk
 2018-02-01 07:22:47 +00:00
Chris Wilson
85a9c0bc08 drm/i915/selftests: Tweak igt_ggtt_page to speed it up 
Reduce the number of GGTT PTE operations to speed the test up, but we
reduce the likelihood of spotting a coherency error in those operations.
However, Broxton is sporadically timing on this test, presumably because
its GGTT operations are all uncached.

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/20171223110407.21402-1-chris@chris-wilson.co.uk
 2018-01-02 15:27:36 +00:00
Matthew Auld
73ebd50303 drm/i915: make mappable struct resource centric 
Now that we are using struct resource to track the stolen region, it is
more convenient if we track the mappable region in a resource as well.

v2: prefer iomap and gmadr naming scheme
    prefer DEFINE_RES_MEM

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171211151822.20953-8-matthew.auld@intel.com
 2017-12-12 12:30:21 +02:00
Chris Wilson
223c73a366 drm/i915/selftests: Report ENOMEM clearly for an allocation failure 
If we can not run the drunk_hole test because we couldn't allocate the
memory for the permutation array (even after we tried trimming the
size), report a clear ENOMEM. Similary, if we are asked to operate on a
hole too small for ourselves, make it skip quietly.

v2: Avoid malloc(0) since that returns ZERO_SIZE_PTR not NULL.
v3: Fixup similar construction for lowlevel_hole
v4: Use u64 >> 1 to avoid 64b div.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171117101732.4335-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171117162945.16390-1-chris@chris-wilson.co.uk
 2017-11-17 18:20:36 +00:00
Chris Wilson
4fe95b042d drm/i915/selftests: exercise_ggtt may have nothing to do 
When operating on the live_ggtt we have to find a usuable hole for our
test. It is possible for there to be no hole we can use, so initialise
the err to 0 for the early exit.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115152558.31252-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
 2017-11-16 15:47:17 +00:00
Chris Wilson
6e1281412a drm/i915/selftests: Always initialise err 
smatch does not track initialised values as well as gcc, and this
triggers many warnings by smatch not presented by gcc. Silence smatch by
initialising the error values to -ENODEV, which we use to denote
internal errors. (If we see a selftest fail with a silent -ENODEV, we
know smatch was right!)

v2: smatch was right about igt_create_vma(), it may unlikely fail on the
first object allocation which we want to be loud about.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171114223346.25958-1-chris@chris-wilson.co.uk
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
 2017-11-14 23:50:49 +00:00
Chris Wilson
c29ccb9f42 drm/i915/selftests: Take rpm wakeref around GGTT lowlevel tests 
The vma routines are responsible for acquiring the device rpm wakeref
before they poke the HW. However, some of the selftests bypass the
higher level vma routines in order to poke directly at the lowlevel GGTT
functions; these are then responsible for managing rpm themselves.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171107114051.10583-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
 2017-11-07 17:50:33 +00:00
Matthew Auld
84e8978e62 drm/i915: s/sg_mask/sg_page_sizes/ 
It's a little unclear what the sg_mask actually is, so prefer the more
meaningful name of sg_page_sizes.

Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171009110024.29114-1-matthew.auld@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2017-10-09 17:07:29 +01:00
Matthew Auld
a5c0816626 drm/i915: introduce page_size members 
In preparation for supporting huge gtt pages for the ppgtt, we introduce
page size members for gem objects.  We fill in the page sizes by
scanning the sg table.

v2: pass the sg_mask to set_pages

v3: calculate the sg_mask inline with populating the sg_table where
possible, and pass to set_pages along with the pages.

v4: bunch of improvements from Joonas

v5: fix num_pages blunder
    introduce i915_sg_page_sizes helper

v6: prefer GEM_BUG_ON(sizes == 0)

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-7-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-6-chris@chris-wilson.co.uk
 2017-10-07 10:11:48 +01:00
Matthew Auld
b91b09eea7 drm/i915: push set_pages down to the callers 
Each backend is now responsible for calling __i915_gem_object_set_pages
upon successfully gathering its backing storage. This eliminates the
inconsistency between the async and sync paths, which stands out even
more when we start throwing around an sg_mask in a later patch.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-6-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-5-chris@chris-wilson.co.uk
 2017-10-07 10:11:45 +01:00
Matthew Auld
4a234c5fae drm/i915: pass the vma to insert_entries 
The vma already contains most of the information we need for insertion.
But also in preparation for supporting huge gtt pages, it would be
useful to know the details of the vma, such that we can we can easily
determine the page sizes we are allowed to use when inserting into the
48b PPGTT.  This is especially true for 64K where we can't just
arbitrarily use it, since we require aligning/padding the vm space to
2M, which sometimes we can't enforce in the upper levels.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170622095836.6800-1-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2017-06-22 16:48:50 +01:00
Chris Wilson
1257e0f804 drm/i915/selftests: Fix error path for ggtt walk_hole() 
The patch 6e32ab3d47: "drm/i915: Fill different pages of the GTT"
from Feb 13, 2017, leads to the following static checker warning:

        drivers/gpu/drm/i915/selftests/i915_gem_gtt.c:583 walk_hole()
        error: 'vma' dereferencing possible ERR_PTR()

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 6e32ab3d47 ("drm/i915: Fill different pages of the GTT"
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: <drm-intel-fixes@lists.freedesktop.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170313100750.2685-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
 2017-03-13 11:16:09 +00:00
Matthew Auld
a5dd8f5a50 drm/i915/selftests: don't leak the gem object 
For our fake dma objects we can leak the underlying gem object if we
fail to pin our "backing storage".

[   39.952618] =============================================================================
[   39.952625] BUG mock_object (Tainted: G     U         ): Objects remaining in mock_object on __kmem_cache_shutdown()
[   39.952629] -----------------------------------------------------------------------------

[   39.952633] Disabling lock debugging due to kernel taint
[   39.952635] INFO: Slab 0xffffea00086c6a00 objects=21 used=1 fp=0xffff88021b1abc00 flags=0x5fff8000008100
[   39.952640] CPU: 1 PID: 1258 Comm: drv_selftest Tainted: G    BU          4.10.0+ #46
[   39.952641] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B17.1602221718 02/22/2016
[   39.952642] Call Trace:
[   39.952648]  dump_stack+0x4d/0x6f
[   39.952651]  slab_err+0x9d/0xb0
[   39.952654]  ? ksm_migrate_page+0xe0/0xe0
[   39.952657]  ? on_each_cpu_cond+0x9a/0xc0
[   39.952658]  ? __kmalloc+0x1af/0x1c0
[   39.952660]  ? __kmem_cache_shutdown+0x173/0x3e0
[   39.952661]  __kmem_cache_shutdown+0x196/0x3e0
[   39.952664]  kmem_cache_destroy+0xa0/0x150
[   39.952708]  mock_device_release+0x113/0x140 [i915]
[   39.952726]  drm_dev_release+0x20/0x40 [drm]
[   39.952735]  drm_dev_unref+0x23/0x30 [drm]
[   39.952768]  i915_gem_gtt_mock_selftests+0x55/0x70 [i915]
[   39.952803]  __run_selftests+0x169/0x1c0 [i915]
[   39.952805]  ? 0xffffffffa0151000
[   39.952840]  i915_mock_selftests+0x30/0x60 [i915]
[   39.952869]  i915_init+0xc/0x78 [i915]
[   39.952870]  ? 0xffffffffa0151000
[   39.952872]  do_one_initcall+0x43/0x170
[   39.952874]  ? __vunmap+0x81/0xd0
[   39.952875]  ? kmem_cache_alloc_trace+0x37/0x170
[   39.952877]  ? do_init_module+0x27/0x1f8
[   39.952879]  do_init_module+0x5f/0x1f8
[   39.952881]  load_module+0x2423/0x29b0
[   39.952882]  ? __symbol_put+0x40/0x40
[   39.952885]  ? kernel_read_file+0x1a3/0x1c0
[   39.952887]  SYSC_finit_module+0xbc/0xf0
[   39.952889]  SyS_finit_module+0xe/0x10
[   39.952892]  entry_SYSCALL_64_fastpath+0x13/0x94

v2: use onion teardown and favour i915_gem_object_put

Fixes: 8d28ba4568 ("drm/i915: Exercise filling the top/bottom portions of the ppgtt")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170306235414.23407-2-matthew.auld@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 2017-03-09 08:42:26 +00:00
Chris Wilson
b3bb82885f drm/i915: Assert all sg are initialised in fake_dma_object for selftests 
Double check that we allocated the right amount of scatterlist elements
for our obj->size.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170225181122.4788-1-chris@chris-wilson.co.uk
 2017-02-25 18:54:36 +00:00
Chris Wilson
91e32157de drm/i915: Timeout lowlevel_hole GTT selftest early 
Check for a timeout in the lowlevel_hole GTT before we allocate state
for that pass, as our cleanup phase stops on the iteration before the
timeout.

References: https://bugs.freedesktop.org/show_bug.cgi?id=99947
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170224193315.21072-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com>
 2017-02-24 20:30:35 +00:00
Chris Wilson
8448661d65 drm/i915: Convert clflushed pagetables over to WC maps 
We flush the entire page every time we update a few bytes, making the
update of a page table many, many times slower than is required. If we
create a WC map of the page for our updates, we can avoid the clflush
but incur additional cost for creating the pagetable. We amoritize that
cost by reusing page vmappings, and only changing the page protection in
batches.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
 2017-02-15 10:07:18 +00:00
Chris Wilson
72affdf972 drm/i915: Silence compiler for GTT selftests 
gcc-4.7 spotted that

In file included from drivers/gpu/drm/i915/i915_gem_gtt.c:3791:0:
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c: In function ‘pot_hole’:
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c:594:6: error: ‘err’ may be used uninitialized in this function [-Werror=maybe-uninitialized]

So set it to 0 should we ever skip over a hole smaller than a few pages.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170214113756.27834-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
 2017-02-14 22:30:21 +00:00
Chris Wilson
e1c5f75406 drm/i915: Avoid overflow in computing pot_hole loop termination 
When using the mock_ppgtt selftest, the GTT is large enough to cause an
overflow in pot_hole() when adding 2 pages to the address. Avoid the
overflow by computing the final valid address and iterating up to that
address.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170214092344.12330-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
 2017-02-14 22:30:20 +00:00
Chris Wilson
7db4dceafa drm/i915: Exercise crossing pot boundaries in the GTT 
As the page-table trees within the GTT are naturally aligned to
power-of-two boundaries, by inserting an object that crosses a
power-of-two (and the power-of-two intervals) we can quickly check the
code for errors in switching between levels in the tree.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-46-chris@chris-wilson.co.uk
 2017-02-13 20:46:52 +00:00
Chris Wilson
af85f50d18 drm/i915: Exercise manipulate of single pages in the GGTT 
Move a single page of an object around within the GGTT and check
coherency of writes and reads.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-45-chris@chris-wilson.co.uk
 2017-02-13 20:46:51 +00:00
Chris Wilson
210e8ac48f drm/i915: Add mock tests for GTT/VMA handling 
Use the live tests against the mock ppgtt for quick testing on all
platforms of the VMA layer.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-44-chris@chris-wilson.co.uk
 2017-02-13 20:46:50 +00:00
Chris Wilson
5f32616edb drm/i915: Add mock exercise for i915_gem_gtt_insert 
i915_gem_gtt_insert should allocate from the available free space in the
GTT, evicting as necessary to create space.

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/20170213171558.20942-43-chris@chris-wilson.co.uk
 2017-02-13 20:46:49 +00:00
Chris Wilson
e619cd0d22 drm/i915: Add mock exercise for i915_gem_gtt_reserve 
i915_gem_gtt_reserve should put the node exactly as requested in the
GTT, evicting as required.

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/20170213171558.20942-42-chris@chris-wilson.co.uk
 2017-02-13 20:46:48 +00:00
Chris Wilson
aae4a3d811 drm/i915: Use fault-injection to force the shrinker to run in live GTT tests 
It is possible whilst allocating the page-directory tree for a ppgtt
bind that the shrinker may run and reap unused parts of the tree. If the
shrinker happens to remove a chunk of the tree that the
allocate_va_range has already processed, we may then try to insert into
the dangling tree. This test uses the fault-injection framework to force
the shrinker to be invoked before we allocate new pages, i.e. new chunks
of the PD tree.

References: https://bugs.freedesktop.org/show_bug.cgi?id=99295
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
 2017-02-13 20:46:32 +00:00
Chris Wilson
4a6f13fce1 drm/i915: Live testing of lowlevel GTT operations 
Directly test allocating the va range and clearing it, this bypasses the
use of i915_vma_bind() and inserting the pages to focus on testing of
the pagetables.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-32-chris@chris-wilson.co.uk
 2017-02-13 20:45:57 +00:00
Chris Wilson
5c3bff482a drm/i915: Exercise filling and removing random ranges from the live GTT 
Test the low-level i915_address_space interfaces to sanity check the
live insertion/removal of address ranges.

v2: Split out the low-level operations to a new test

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-31-chris@chris-wilson.co.uk
 2017-02-13 20:45:56 +00:00
Chris Wilson
6e32ab3d47 drm/i915: Fill different pages of the GTT 
Exercise filling different pages of the GTT

v2: Walk all holes until we timeout

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/20170213171558.20942-30-chris@chris-wilson.co.uk
 2017-02-13 20:45:56 +00:00
Chris Wilson
62c981cfe7 drm/i915: Exercise filling the top/bottom portions of the global GTT 
Same test as previously for the per-process GTT instead applied to the
global GTT.

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/20170213171558.20942-29-chris@chris-wilson.co.uk
 2017-02-13 20:45:55 +00:00
Chris Wilson
8d28ba4568 drm/i915: Exercise filling the top/bottom portions of the ppgtt 
Allocate objects with varying number of pages (which should hopefully
consist of a mixture of contiguous page chunks and so coalesced sg
lists) and check that the sg walkers in insert_pages cope.

v2: Check both small <-> large

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/20170213171558.20942-28-chris@chris-wilson.co.uk
 2017-02-13 20:45:54 +00:00
Chris Wilson
1c42819a14 drm/i915: Add initial selftests for i915_gem_gtt 
Simple starting point for adding selftests for i915_gem_gtt, first
try creating a ppGTT and filling it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-27-chris@chris-wilson.co.uk
 2017-02-13 20:45:52 +00:00