Internal objects must be passed a page-aligned size. Check it.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170116145242.13875-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

Some engines are never user or already sitting idle in the kernel
context and for those we can skip flushing the current context for
i915_gem_switch_to_kernel_context(). We used to perform this
optimisation but that was removed for convenience of converting over to
multiple timelines and handling the pending request queues.

From the perspective of writing selftests, reducing the number of
background operations on the engines makes defining assertions easier.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114162334.10271-2-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

As we now have the ability to directly reset the GPU from the waiter
(and so do not need to drop the lock in order to let the reset proceed)
and also do not lose requests over a reset, we can now simply queue the
request to occur after the reset rather than roundtripping to userspace
(or worse failing with EIO).
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114162334.10271-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

i915_gem_gtt_reserve() and i915_gem_gtt_insert() can only work on
unallocated nodes. Check that the callers complies.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170115172740.28995-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

The aliasing_gtt is just that, an alias of the global GTT. We do not
populate it directly, instead we always use the global GTT. Catch any
attempt to incorrectly allocate ranges from the aliasing_gtt.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170115134746.29325-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

When marking the debugobject as freed, be sure that write is flushed
before another CPU may see it on a reallocation path.

Only seen once in CI:

[  159.240873] WARNING: CPU: 3 PID: 6735 at lib/debugobjects.c:263 debug_print_object+0x87/0xb0
[  159.240897] ODEBUG: init destroyed (active state 0) object type: i915_sw_fence hint: submit_notify+0x0/0x4c [i915]
[  159.240902] Modules linked in: snd_hda_intel i915 x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul snd_hda_codec_generic snd_hda_codec_hdmi ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm mei_me lpc_ich mei e1000e ptp pps_core [last unloaded: i915]
[  159.240913] CPU: 3 PID: 6735 Comm: gem_exec_nop Tainted: G     U          4.10.0-rc3-CI-Trybot_479+ #1
[  159.240913] Hardware name: LENOVO 10AGS00601/SHARKBAY, BIOS FBKT34AUS 04/24/2013
[  159.240914] Call Trace:
[  159.240916]  dump_stack+0x67/0x92
[  159.240919]  __warn+0xc6/0xe0
[  159.240920]  warn_slowpath_fmt+0x4a/0x50
[  159.240921]  debug_print_object+0x87/0xb0
[  159.240935]  ? __i915_request_wait_for_execute+0x1d0/0x1d0 [i915]
[  159.240936]  __debug_object_init+0xb2/0x410
[  159.240950]  ? __i915_request_wait_for_execute+0x1d0/0x1d0 [i915]
[  159.240951]  debug_object_init+0x16/0x20
[  159.240962]  __i915_sw_fence_init+0x29/0x60 [i915]
[  159.240975]  i915_gem_request_alloc+0x1fb/0x450 [i915]
[  159.240987]  i915_gem_do_execbuffer.isra.15+0x798/0x1b20 [i915]
[  159.241000]  i915_gem_execbuffer2+0xc0/0x250 [i915]
[  159.241003]  drm_ioctl+0x200/0x450
[  159.241016]  ? i915_gem_execbuffer+0x330/0x330 [i915]
[  159.241018]  do_vfs_ioctl+0x90/0x6e0
[  159.241020]  ? trace_hardirqs_on_caller+0x122/0x1b0
[  159.241021]  SyS_ioctl+0x3c/0x70
[  159.241023]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  159.241024] RIP: 0033:0x7f9bc4f41357
[  159.241025] RSP: 002b:00007ffc6cd5c568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  159.241026] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9bc4f41357
[  159.241026] RDX: 00007ffc6cd5c640 RSI: 0000000040406469 RDI: 0000000000000003
[  159.241027] RBP: 00007ffc6cd5c640 R08: 0000000000047508 R09: 0000000000000001
[  159.241027] R10: 000b58552d323c3d R11: 0000000000000246 R12: 0000000040406469
[  159.241028] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000001
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170113214335.5829-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/intel_dp.c:3063:6: warning: no previous prototype for ‘intel_dp_get_alpm_status’ [-Wmissing-prototypes]
 bool intel_dp_get_alpm_status(struct intel_dp *intel_dp)
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114105113.1231-2-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/i915_gpu_error.c: In function ‘i915_error_vprintf’:
drivers/gpu/drm/i915/i915_gpu_error.c:137:3: warning:
function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
   len = vsnprintf(NULL, 0, f, tmp);
   ^~~
drivers/gpu/drm/i915/i915_gpu_error.c:144:2: warning:
function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
  len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
  ^~~
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114105113.1231-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

Since commit 058d88c4 ("drm/i915: Track pinned VMA"), there is only
one user of i915_ggtt_view_normal rodate. Just treat NULL as no special
view in pin_to_display() like everywhere else.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-7-chris@chris-wilson.co.uk

It is only being used to clear a struct and set the type, after which it
is overwritten. Since we no longer check the unset bits of the union,
skipping the clear is permissible.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-6-chris@chris-wilson.co.uk

Reading the ggtt_views is much more pleasant without the extra
characters from specifying the union (i.e. ggtt_view.partial rather than
ggtt_view.params.partial). To make this work inside i915_vma_compare()
with only a single memcmp requires us to ensure that there are no
uninitialised bytes within each branch of the union (we make sure the
structs are packed) and we need to store the size of each branch.

v4: Rewrite changelog and add comments explaining the assert.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-5-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>

As we now use a compact memcmp in i915_vma_compare(), we can forgo
clearing the entire view and only set the precise parameters used in
this view.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-4-chris@chris-wilson.co.uk

In preparation for the next patch to convert to using an anonymous union
and leaving the excess bytes in the union uninitialised, we first need
to make sure we do not compare using those uninitialised bytes. We also
want to preserve the compactness of the code, avoiding a second call to
memcmp or introducing a switch, so we take advantage of using the type
as an encoded size (as well as a unique identifier for each type of view).

v2: Add the rationale for why we encode size into ggtt_view.type as a
comment before the memcmp()
v3: Use a switch to also assert that no two i915_ggtt_view_type have the same
value.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-3-chris@chris-wilson.co.uk

In the next few patches, we will depend upon there being no
uninitialised bits inside the ggtt_view. To ensure this we add the
__packed attribute and double check with a build bug that gcc hasn't
expanded the struct to include some padding bytes.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-2-chris@chris-wilson.co.uk

Naming this pair will become useful shortly...
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170114002827.31315-1-chris@chris-wilson.co.uk

Reports  live state of PSR2 form PSR2_STATUS register.
bit field 31:28 gives the live state of PSR2.
It can be used to check if system is in deep sleep,
selective update or selective update standby.
During video play back, we can use this to check
if system is entering SU mode or not.
when system is in idle state, DEEP_SLEEP(8) must be entered.
When video playback is happening, system must be in
SLEEP(3 / selective update) or SU_STANDBY( 6 / selective update standby)

v2: (Rodrigo)
- Remove EDP_PSR2_STATUS_TG_ON=a ,instead use ARRAY_SIZE

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483720352-24761-1-git-send-email-vathsala.nagaraju@intel.com

Psr2 is enabled only for y cordinate panels.Once GTC (global time code)
is implemented,this restriction is removed so that psr2
can work on panels without y cordinate support.

v2: (Rodrigo)
- Move the check to intel_psr_match_conditions

v3: (Rodrigo)
- add return false

v4: rebase

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484173710-3138-1-git-send-email-vathsala.nagaraju@intel.com

Program EDP_PSR_DEBUG_CTL (PSR_MASK) to enable system
to go to deep sleep while in psr2.PSR2_STATUS bit 31:28
should report value 8 , if system enters deep sleep state.

Also, EDP_FRAMES_BEFORE_SU_ENTRY is set 1 , if not set,
flickering is observed on psr2 panel.

v2: (Ilia Mirkin)
- Remove duplicate bit definition 25:27

v3: rebase

v4: rebase

v5: rebase

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NJim Bride <jim.bride@linux.intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484267484-21843-1-git-send-email-vathsala.nagaraju@intel.com

As per bpsec, CHICKEN_TRANS_EDP bit 12 ,15 must be programmed in
psr2 enable sequence.
bit 12 : Program Transcoder EDP VSC DIP header with a valid setting for
        PSR2 and Set CHICKEN_TRANS_EDP(0x420cc) bit 12 for programmable
        header packet.
bit 15 : Set CHICKEN_TRANS_EDP(0x420cc) bit 15 if Y coordinate is supported

v2: (Rodrigo)
- move CHICKEN_TRANS_EDP bit set logic right after setup_vsc

v3:(Rodrigo)
- initialize chicken_trans to CHICKEN_TRANS_BIT12 instead of 0

v4:(chris wilson)
- use BIT(12), remove CHICKEN_TRANS_BIT12
- remove unnecessary comments
- update commit message

v5:
- rename bit 12 PSR2_VSC_ENABLE_PROG_HEADER
- rename bit 15 PSR2_ADD_VERTICAL_LINE_COUNT

v6:(Rodrigo)
- remove TRANS_EDP=3, use cpu_transcoder

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Nvathsala nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484247691-20930-1-git-send-email-vathsala.nagaraju@intel.com

We currently check after the slow path that the vma is bound correctly,
but we don't currently check after the fast path. This is important in
case we accidentally take the fast path and leave the vma misplaced.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111210937.29252-27-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

Move it alongside its ppgtt counterparts, in order to make it available
for the ppgtt selftests.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111210937.29252-26-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

As per edp1.4 spec , alpm is required for psr2 operation as it's
used for all psr2  main link power down management and alpm enable
bit must be set for psr2 operation.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Nvathsala nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NJim Bride <jim.bride@linux.intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483356663-32668-6-git-send-email-vathsala.nagaraju@intel.com

Screen freeze observed if AUX_FRAME_SYNC is not disabled
on psr2 exit.AUX_FRAME_SYNC needed for psr2 is enabled during
psr2 entry. It must be disabled on psr2 exit.

v2: rebase

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484147673-2044-1-git-send-email-vathsala.nagaraju@intel.com

Psr1 and psr2 are mutually exclusive,ie when psr2 is enabled,
psr1 should be disabled.When psr2 is exited , bit 31 of reg
PSR2_CTL must be set to 0 but currently bit 31 of SRD_CTL
(psr1 control register)is set to 0.
Also ,PSR2_IDLE state is looked up from SRD_STATUS(psr1 register)
instead of PSR2_STATUS register, which has wrong data, resulting
in blankscreen.
hsw_enable_source is split into hsw_enable_source_psr1 and
hsw_enable_source_psr2 for easier code review and maintenance,
as suggested by rodrigo and jim.

v2: (Rodrigo)
- Rename hsw_enable_source_psr* to intel_enable_source_psr*

v3: (Rodrigo)
- In hsw_psr_disable ,
  1) for psr active case, handle psr2 followed by psr1.
  2) psr inactive case, handle psr2 followed by psr1

v4:(Rodrigo)
- move psr2 restriction(32X20) to match_conditions function
  returning false and fully blocking PSR to a new patch before
  this one.

v5: in source_psr2, removed val = EDP_PSR_ENABLE

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: NPatil Deepti <deepti.patil@intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484244059-9201-1-git-send-email-vathsala.nagaraju@intel.com

Parameter: good.
Parameter - bad.

One day I'll learn the syntax.

Fixes: 625d988a ("drm/i915: Extract reserving space in the GTT to a helper")
Fixes: e007b19d ("drm/i915: Use the MRU stack search after evicting")
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112164559.27232-1-chris@chris-wilson.co.ukReviewed-by: NMatthew Auld <matthew.auld@intel.com>

When dumping the VMA, include the parameters of the different GGTT views
so that we can distinguish them.

v2: Contract output and add MISSING_CASE for any unknown types.
v3: Show both stride and offset for rotated planes.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112112108.31632-1-chris@chris-wilson.co.uk

The internal object is a collection of struct pages and so is
intrinsically linked to the available physical memory on the machine,
and not an arbitrary type from the uabi. Use phys_addr_t so the link
between size and memory consumption is clear, and then double check that
we don't overflow the maximum object size.

v2: Also assert that size is not zero - a mistake I made a few times
while writing selftests.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112130431.1844-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

Move the GuC invalidation of its ggtt TLB to where we perform the ggtt
modification rather than proliferate it into all the callers of the
insert (which may or may not in fact have to do the insertion).

v2: Just do the guc invalidate unconditionally, (afaict) it has no impact
without the guc loaded on gen8+
v3: Conditionally invalidate the guc - just in case that register has
not been validated for other modes.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112110050.25333-1-chris@chris-wilson.co.uk

The visible member used to be in intel_plane_state->visible,
but has been moved to drm_plane_state->visible. In the conversion
some casts were left in that are now useless.

to_intel_plane_state(x)->base.visible is the same as x->visible,
so use the latter to clear up the code a little.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484214225-30328-1-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>

Since commit c033666a ("drm/i915: Store a i915 backpointer from
engine, and use it") i915_reset receives dev_priv, but the kerneldoc
was not updated.
Signed-off-by: NMichel Thierry <michel.thierry@intel.com>
Reviewed-by: NMika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112041817.1102-3-michel.thierry@intel.com

And before the function description.
Tidy up from commit 14bb2c11 ("drm/i915: Fix a buch of kerneldoc
warnings"), all others kerneldoc blocks look ok.

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: NMichel Thierry <michel.thierry@intel.com>
Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112041817.1102-2-michel.thierry@intel.com

The WaDisableLSQCROPERFforOCL workaround has the side effect of
disabling an L3SQ optimization that has huge performance implications
and is unlikely to be necessary for the correct functioning of usual
graphic workloads.  Userspace is free to re-enable the workaround on
demand, and is generally in a better position to determine whether the
workaround is necessary than the DRM is (e.g. only during the
execution of compute kernels that rely on both L3 fences and HDC R/W
requests).

The same workaround seems to apply to BDW (at least to production
stepping G1) and SKL as well (the internal workaround database claims
that it does for all steppings, while the BSpec workaround table only
mentions pre-production steppings), but the DRM doesn't do anything
beyond whitelisting the L3SQCREG4 register so userspace can enable it
when it sees fit.  Do the same on KBL platforms.

Improves performance of the GFXBench4 gl_manhattan31 benchmark by 60%,
and gl_4 (AKA car chase) by 14% on a KBL GT2 running Mesa master --
This is followed by a regression of 35% and 10% respectively for the
same benchmarks and platform caused by my recent patch series
switching userspace to use the dataport constant cache instead of the
sampler to implement uniform pull constant loads, which caused us to
hit more heavily the L3 cache (and on platforms other than KBL had the
opposite effect of improving performance of the same two benchmarks).
The overall effect on KBL of this change combined with the recent
userspace change is respectively 4.6% and 2.6%.  SynMark2 OglShMapPcf
was affected by the constant cache changes (though it improved as it
did on other platforms rather than regressing), but is not
significantly affected by this patch (with statistical significance of
5% and sample size 20).

v2: Drop some more code to avoid unused variable warning.

Fixes: 738fa1b3 ("drm/i915/kbl: Add WaDisableLSQCROPERFforOCL")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99256Signed-off-by: NFrancisco Jerez <currojerez@riseup.net>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Cc: Eero Tamminen <eero.t.tamminen@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: beignet@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.7+
Reviewed-by: NMika Kuoppala <mika.kuoppala@intel.com>
[Removed double Fixes tag]
Signed-off-by: NMika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484217894-20505-1-git-send-email-mika.kuoppala@intel.com

Since commit 4741da92 ("drm/i915/guc: Assert that all GGTT offsets used
by the GuC are mappable"), we're asserting that GuC firmware is in the
GuC mappable range.
Except we're not pinning the object with bias, which means it's possible
to trigger this assert. Let's add a proper bias.

Fixes: 4741da92 ("drm/i915/guc: Assert that all GGTT offsets used by the GuC are mappable")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: NMichał Winiarski <michal.winiarski@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Tested-by: NTomi Sarvela <tomi.p.sarvela@intel.com>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111151739.28965-1-michal.winiarski@intel.com

Add the documentation about HD-audio DP MST:
1. pin initialization
2. device entry connection list
Reviewed-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NLibin Yang <libin.yang@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484208294-8637-4-git-send-email-libin.yang@intel.com

This patch adds the DP MST audio support on i915 platform and
it will enable dyn_pcm_assign feature.

DP MST supports several device entry on the same port and each
device entry can map to one pcm stream. For example, on i915,
there are 3 pins, and each pin has 3 device entries. This means
there should be 3x3 pcms. However, there is only 3 pipe lines in
i915. This means 3 pcms are actived at most at the same moment.
We will create 5 pcms (pin number + dev entry num - 1) in this case.
For the details, please refer commit a76056f2
("ALSA: hda - hdmi dynamically bind PCM to pin when monitor hotplug")

Each device entry is a virtual pin. It is described by pin_nid and dev_id
in struct hdmi_spec_per_pin.
Reviewed-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NLibin Yang <libin.yang@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484208294-8637-3-git-send-email-libin.yang@intel.com

Add snd_hda_get_dev_select() and snd_hda_set_dev_select() functions
for DP MST audio support.
Reviewed-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NLibin Yang <libin.yang@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1484208294-8637-2-git-send-email-libin.yang@intel.com

Check if ppgtt is valid for context when init reg state. For gvt
context which has no i915 allocated ppgtt, failed to check that
would cause kernel null ptr reference error.

v2: remove !48bit ppgtt case as we'll always update before submit (Chris)
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170109131453.3943-1-zhenyuw@linux.intel.com

The vma->exec_list is still the only means we have for both reserving an
object in execbuf, and for constructing the eviction list. So during the
construction of the eviction list, we must treat anything already on the
exec_list as being pinned.

Yes, this sharing of two semantically different lists will be fixed! But
in the meantime, we have the issue that this is tripping up CI since we
started using i915_gem_gtt_reserve_node() + i915_gem_evict_for_node()
from the regular execbuf reservation path in commit 606fec95
("drm/i915: Prefer random replacement before eviction search"):

[  108.424063] kernel BUG at drivers/gpu/drm/i915/i915_vma.h:254!
[  108.424072] invalid opcode: 0000 [#1] PREEMPT SMP
[  108.424079] Modules linked in: snd_hda_intel i915 intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_codec snd_hwdep snd_hda_core mei_me snd_pcm lpc_ich mei sdhci_pci sdhci mmc_core e1000e ptp pps_core [last unloaded: i915]
[  108.424132] CPU: 1 PID: 6865 Comm: gem_cs_tlb Tainted: G     U          4.10.0-rc3-CI-CI_DRM_2049+ #1
[  108.424143] Hardware name: Hewlett-Packard HP EliteBook 8440p/172A, BIOS 68CCU Ver. F.24 09/13/2013
[  108.424154] task: ffff88012ae22600 task.stack: ffffc90000a14000
[  108.424220] RIP: 0010:i915_gem_evict_for_node+0x237/0x410 [i915]
[  108.424229] RSP: 0018:ffffc90000a17a58 EFLAGS: 00010202
[  108.424237] RAX: 0000000000005871 RBX: ffff88012d1ad778 RCX: 0000000000000000
[  108.424246] RDX: 000000007ffff000 RSI: ffffc90000a17a68 RDI: ffff880127e694d8
[  108.424255] RBP: ffffc90000a17aa0 R08: ffffc90000a17a68 R09: 0000000000000000
[  108.424264] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000080000000
[  108.424273] R13: ffffc90000a17a68 R14: ffff880127e694d8 R15: ffffffffa0387330
[  108.424283] FS:  00007f8236e3d8c0(0000) GS:ffff880137c40000(0000) knlGS:0000000000000000
[  108.424293] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  108.424305] CR2: 00007f82347a2000 CR3: 000000012c866000 CR4: 00000000000006e0
[  108.424317] Call Trace:
[  108.424368]  i915_gem_gtt_reserve+0x67/0x80 [i915]
[  108.424424]  __i915_vma_do_pin+0x248/0x620 [i915]
[  108.424487]  ? __i915_vma_do_pin+0x162/0x620 [i915]
[  108.424540]  i915_gem_execbuffer_reserve_vma.isra.8+0x153/0x1f0 [i915]
[  108.424591]  i915_gem_execbuffer_reserve.isra.9+0x40e/0x440 [i915]
[  108.424643]  i915_gem_do_execbuffer.isra.15+0x6d9/0x1b20 [i915]
[  108.424696]  i915_gem_execbuffer2+0xc0/0x250 [i915]
[  108.424712]  drm_ioctl+0x200/0x450
[  108.424760]  ? i915_gem_execbuffer+0x330/0x330 [i915]
[  108.424776]  do_vfs_ioctl+0x90/0x6e0
[  108.424789]  ? up_read+0x1a/0x40
[  108.424800]  ? trace_hardirqs_on_caller+0x122/0x1b0
[  108.424813]  SyS_ioctl+0x3c/0x70
[  108.424828]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  108.424839] RIP: 0033:0x7f8235867357
[  108.424848] RSP: 002b:00007ffdc14504c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  108.424866] RAX: ffffffffffffffda RBX: 00007ffdc1450600 RCX: 00007f8235867357
[  108.424878] RDX: 00007ffdc14505a0 RSI: 0000000040406469 RDI: 0000000000000003
[  108.424890] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000022
[  108.424903] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000002
[  108.424915] R13: 0000000000419101 R14: 00007ffdc1450600 R15: 00007ffdc14505f0
[  108.424928] Code: 45 b8 8b 4d c0 4c 89 f2 48 89 de ff d0 49 8b 07 4c 8b 45 b8 48 85 c0 75 dd 65 ff 0d d4 a1 c8 5f 0f 84 47 01 00 00 e9 0d fe ff ff <0f> 0b 45 31 f6 4c 8b 65 c8 49 8b 04 24 4d 39 ec 49 8d 9c 24 28
[  108.425055] RIP: i915_gem_evict_for_node+0x237/0x410 [i915] RSP: ffffc90000a17a58

Fixes: 172ae5b4 ("drm/i915: Fix i915_gem_evict_for_vma (soft-pinning)")
Fixes: 606fec95 ("drm/i915: Prefer random replacement before eviction search")
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111182132.19174-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

It is an error to start a new request on the same timeline (ringbuffer)
as the current one before the current is submitted. If there are two
requests emitting to the ringbuffer at the same time, the operation is
undefined. We can catch this by checking for the timeline having a later
seqno than ours when we come to submit our request.

Currently we have this check at the end of __i915_add_request, but
having an early check as well isolates a failure in the caller versus a
failure in sealing the request (i.e. from inside __i915_add_request
itself). For example, CI is currently tripping over this late assertion
on ctg/ilk:

[  100.329399] [IGT] gem_cs_tlb: starting subtest basic-default
[  100.336333] ------------[ cut here ]------------
[  100.336341] kernel BUG at drivers/gpu/drm/i915/i915_gem_request.c:908!
[  100.336347] invalid opcode: 0000 [#1] PREEMPT SMP
[  100.336351] Modules linked in: snd_hda_intel i915 snd_hda_codec_generic snd_hda_codec snd_hwdep snd_hda_core snd_pcm coretemp mei_me lpc_ich mei e1000e ptp pps_core [last unloaded: i915]
[  100.336373] CPU: 0 PID: 6308 Comm: gem_cs_tlb Tainted: G     U          4.10.0-rc3-CI-CI_DRM_2045+ #1
[  100.336380] Hardware name: LENOVO 7465CTO/7465CTO, BIOS 6DET44WW (2.08 ) 04/22/2009
[  100.336386] task: ffff88012b738040 task.stack: ffffc90000560000
[  100.336441] RIP: 0010:__i915_add_request+0x4aa/0x510 [i915]
[  100.336445] RSP: 0018:ffffc90000563ac0 EFLAGS: 00010212
[  100.336451] RAX: 0000000000005d52 RBX: ffff880133bb84c0 RCX: 0000000000000001
[  100.336456] RDX: 0000000080000001 RSI: ffff88012b738860 RDI: 00000000ffffffff
[  100.336461] RBP: ffffc90000563b00 R08: ffff880133bb8780 R09: 0000000000000000
[  100.336466] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88012f53d950
[  100.336472] R13: ffff88012a2b0af8 R14: ffff88012a5b0008 R15: ffff88012f53d960
[  100.336477] FS:  00007f0d19da38c0(0000) GS:ffff88013bc00000(0000) knlGS:0000000000000000
[  100.336483] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.336488] CR2: 00007f0d17706000 CR3: 000000012aa3e000 CR4: 00000000000406f0
[  100.336496] Call Trace:
[  100.336527]  i915_gem_switch_to_kernel_context+0x131/0x1b0 [i915]
[  100.336559]  i915_gem_evict_vm+0x202/0x2b0 [i915]
[  100.336590]  i915_gem_execbuffer_reserve.isra.9+0x3ae/0x440 [i915]
[  100.336623]  i915_gem_do_execbuffer.isra.15+0x6d9/0x1b20 [i915]
[  100.336656]  i915_gem_execbuffer2+0xc0/0x250 [i915]
[  100.336666]  drm_ioctl+0x200/0x450
[  100.336697]  ? i915_gem_execbuffer+0x330/0x330 [i915]
[  100.336708]  do_vfs_ioctl+0x90/0x6e0
[  100.336716]  ? up_read+0x1a/0x40
[  100.336723]  ? trace_hardirqs_on_caller+0x122/0x1b0
[  100.336730]  SyS_ioctl+0x3c/0x70
[  100.336738]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  100.336745] RIP: 0033:0x7f0d187cb357
[  100.336750] RSP: 002b:00007ffe0b2f7c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  100.336761] RAX: ffffffffffffffda RBX: 00007ffe0b2f7d60 RCX: 00007f0d187cb357
[  100.336768] RDX: 00007ffe0b2f7d00 RSI: 0000000040406469 RDI: 0000000000000003
[  100.336775] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000022
[  100.336782] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000002
[  100.336789] R13: 0000000000419101 R14: 00007ffe0b2f7d60 R15: 00007ffe0b2f7d50
[  100.336797] Code: 5f 74 1e e9 d4 fb ff ff e8 bc 1e 9c e0 e9 ae fb ff ff 4c 89 e7 e8 77 22 fd ff e9 88 fd ff ff 0f 0b e8 a3 1e 9c e0 e9 b1 fb ff ff <0f> 0b 0f 0b e8 fd af ab e0 85 c0 75 c2 48 c7 c2 80 2c 71 a0 be
[  100.336877] RIP: __i915_add_request+0x4aa/0x510 [i915] RSP: ffffc90000563ac0
[  100.336886] ---[ end trace 22b36545479e5eb7 ]---
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111140858.1922-1-chris@chris-wilson.co.ukReviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>

Performing an eviction search can be very, very slow especially for a
range restricted replacement. For example, a workload like
gem_concurrent_blit will populate the entire GTT and then cause aperture
thrashing. Since the GTT is a mix of active and inactive tiny objects,
we have to search through almost 400k objects before finding anything
inside the mappable region, and as this search is required before every
operation performance falls off a cliff.

Instead of performing the full search, we do a trial replacement of the
node at a random location fitting the specified restrictions. We lose
the strict LRU property of the GTT in exchange for avoiding the slow
search (several orders of runtime improvement for gem_concurrent_blit
4KiB-global-gtt, e.g. from 5000s to 20s). The loss of LRU replacement is
(later) mitigated firstly by only doing replacement if we find no
freespace and secondly by execbuf doing a PIN_NONBLOCK search first before
it starts thrashing (i.e. the random replacement will only occur from the
already inactive set of objects).

v2: Ascii-art, and check preconditionst
v3: Rephrase final sentence in comment to explain why we don't bother
with if (i915_is_ggtt(vm)) for preferring random replacement.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170111112312.31493-3-chris@chris-wilson.co.uk