drm/i915: remove i915_drm_client::id

i915_drm_client::id is not used since commit e894b724c316 (drm/i915:
Use the fdinfo helper). Drop it.

Found by https://github.com/jirislaby/clang-struct.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240216065326.6910-10-jirislaby@kernel.org

drm/i915: Remove return type from i915_drm_client_remove_object

There is no need to return anything in the version which was merged and
also the implementation of the !CONFIG_PROC_FS wasn't returning anything,
causing a build failure there.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: e4ae85e364fc ("drm/i915: Add ability for tracking buffer objects per client")
Cc: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311110104.8TlHVxUI-lkp@intel.com/
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231113085457.199053-1-tvrtko.ursulin@linux.intel.com

drm/i915: Account ring buffer and context state storage

Account ring buffers and logical context space against the owning client
memory usage stats.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231107101806.608990-4-tvrtko.ursulin@linux.intel.com

drm/i915: Add ability for tracking buffer objects per client

In order to show per client memory usage lets add some infrastructure
which enables tracking buffer objects owned by clients.

We add a per client list protected by a new per client lock and to support
delayed destruction (post client exit) we make tracked objects hold
references to the owning client.

Also, object memory region teardown is moved to the existing RCU free
callback to allow safe dereference from the fdinfo RCU read section.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231107101806.608990-1-tvrtko.ursulin@linux.intel.com

drm/i915: make i915_drm_client_fdinfo() reference conditional again

The function is only defined if CONFIG_PROC_FS is enabled:

ld.lld: error: undefined symbol: i915_drm_client_fdinfo
>>> referenced by i915_driver.c
>>> drivers/gpu/drm/i915/i915_driver.o:(i915_drm_driver) in archive vmlinux.a

Use the PTR_IF() helper to make the reference NULL otherwise.

Fixes: e894b724c316d ("drm/i915: Use the fdinfo helper")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230616093158.3568480-1-arnd@kernel.org

drm/i915: make i915_drm_client_fdinfo() reference conditional again

The function is only defined if CONFIG_PROC_FS is enabled:

ld.lld: error: undefined symbol: i915_drm_client_fdinfo
>>> referenced by i915_driver.c
>>> drivers/gpu/drm/i915/i915_driver.o:(i915_drm_driver) in archive vmlinux.a

Use the PTR_IF() helper to make the reference NULL otherwise.

Fixes: e894b724c316d ("drm/i915: Use the fdinfo helper")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230616093158.3568480-1-arnd@kernel.org
(cherry picked from commit 8084c63743a88472af0a34ba209eebf9caea1dae)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

drm/i915: Use the fdinfo helper

Use the common fdinfo helper for printing the basics. Remove now unused
client id allocation code.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Rob Clark <robdclark@chromium.org>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230605123224.373633-1-tvrtko.ursulin@linux.intel.com

drm/i915/client: only include what's needed

Only the uapi header is required.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607092207.476653-1-jani.nikula@intel.com

drm/i915/xehp: Add compute engine ABI

We're now ready to start exposing compute engines to userspace.

v2:
- Move kerneldoc for other engine classes to a separate patch. (Andi)

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Szymon Morek <szymon.morek@intel.com>
UMD (mesa): https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14395
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Jordan Justen <jordan.l.justen@intel.com> # mesa anvil & iris
Link: https://patchwork.freedesktop.org/patch/msgid/20220428041926.1483683-4-matthew.d.roper@intel.com

drm/i915: Expose client engine utilisation via fdinfo

Similar to AMD commit
874442541133 ("drm/amdgpu: Add show_fdinfo() interface"), using the
infrastructure added in previous patches, we add basic client info
and GPU engine utilisation for i915.

Example of the output:

pos: 0
flags: 0100002
mnt_id: 21
drm-driver: i915
drm-pdev: 0000:00:02.0
drm-client-id: 7
drm-engine-render: 9288864723 ns
drm-engine-copy: 2035071108 ns
drm-engine-video: 0 ns
drm-engine-video-enhance: 0 ns

v2:
* Update for removal of name and pid.

v3:
* Use drm_driver.name.

v4:
* Added drm-engine-capacity- tag.
* Fix typo. (Umesh)

v5:
* Don't output engine data before Gen8.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: David M Nieto <David.Nieto@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Chris Healy <cphealy@gmail.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-9-tvrtko.ursulin@linux.intel.com

drm/i915: Track all user contexts per client

We soon want to start answering questions like how much GPU time is the
context belonging to a client which exited still using.

To enable this we start tracking all context belonging to a client on a
separate list.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-5-tvrtko.ursulin@linux.intel.com

drm/i915: Track runtime spent in closed and unreachable GEM contexts

As contexts are abandoned we want to remember how much GPU time they used
(per class) so later we can used it for smarter purposes.

As GEM contexts are closed we want to have the DRM client remember how
much GPU time they used (per class) so later we can used it for smarter
purposes.

v2:
* Size past runtimes array by uabi class, not internal.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com> # v1
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> # v1
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-4-tvrtko.ursulin@linux.intel.com

drm/i915: Explicitly track DRM clients

Tracking DRM clients more explicitly will allow later patches to
accumulate past and current GPU usage in a centralised place and also
consolidate access to owning task pid/name.

Unique client id is also assigned for the purpose of distinguishing/
consolidating between multiple file descriptors owned by the same process.

v2:
Chris Wilson:
* Enclose new members into dedicated structs.
* Protect against failed sysfs registration.

v3:
* sysfs_attr_init.

v4:
* Fix for internal clients.

v5:
* Use cyclic ida for client id. (Chris)
* Do not leak pid reference. (Chris)
* Tidy code with some locals.

v6:
* Use xa_alloc_cyclic to simplify locking. (Chris)
* No need to unregister individial sysfs files. (Chris)
* Rebase on top of fpriv kref.
* Track client closed status and reflect in sysfs.

v7:
* Make drm_client more standalone concept.

v8:
* Simplify sysfs show. (Chris)
* Always track name and pid.

v9:
* Fix cyclic id assignment.

v10:
* No need for a mutex around xa_alloc_cyclic.
* Refactor sysfs into own function.
* Unregister sysfs before freeing pid and name.
* Move clients setup into own function.

v11:
* Call clients init directly from driver init. (Chris)

v12:
* Do not fail client add on id wrap. (Maciej)

v13 (Lucas): Rebase.

v14:
* Dropped sysfs bits.

v15:
* Dropped tracking of pid/ and name.
* Dropped RCU freeing of the client object.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> # v11
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com> # v11
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-2-tvrtko.ursulin@linux.intel.com