Commit Graph

31 Commits

Author SHA1 Message Date
Rodrigo Vivi 783d6cdc82
drm/xe: Kill xe_device_mem_access_{get*,put}
Let's simply convert all the current callers towards direct
xe_pm_runtime access and remove this extra layer of indirection.

No functional change is expected with this patch since
xe_mem_access_get was already using the xe_pm_runtime_get_noresume
at this point.

v2: Convert all the current callers instead of a big refactor
at once.

v3: - Rebased
    - Squashed the GSC/HDCP
    - Added a new case: sriov_pf_policy
    - Improved commit message to highlight that
      there's no functional change in this patch.

Reviewed-by: Matthew Auld <matthew.auld@intel.com> #v2
Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240418143049.43231-1-rodrigo.vivi@intel.com
2024-04-22 09:03:09 -04:00
Rodrigo Vivi 16b57c90bb
drm/xe: Convert mem_access_if_ongoing to direct xe_pm_runtime_get_if_active
Now that assert_mem_access is relying directly on the pm_runtime state
instead of the counters, there's no reason why we cannot use
the pm_runtime functions directly.

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417203952.25503-8-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2024-04-18 08:31:40 -04:00
Rodrigo Vivi a382291017
drm/xe: Removing extra mem_access protection from runtime pm
This is not needed any longer, now that we have all the protection
in place with the runtime pm itself.

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417203952.25503-7-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2024-04-18 08:31:40 -04:00
Rodrigo Vivi 8ae84a2744
drm/xe: Move lockdep protection from mem_access to xe_pm_runtime
The mem_access itself is not holding any lock, but attempting
to train lockdep with possible scarring locks happening during
runtime pm. We are going soon to kill the mem_access get and put
helpers in favor of direct xe_pm_runtime calls, so let's just
move this lock around to where it now belongs.

v2: s/lockdep_training/lockdep_prime (Matt Auld)

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417203952.25503-4-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2024-04-18 08:31:39 -04:00
Matthew Auld a96cd71ec7 drm/xe/device: fix XE_MAX_TILES_PER_DEVICE check
Here XE_MAX_TILES_PER_DEVICE is the gt array size, therefore the gt
index should always be less than.

v2 (Lucas):
  - Add fixes tag.

Fixes: dd08ebf6c3 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240318180532.57522-6-matthew.auld@intel.com
2024-03-19 08:49:00 +00:00
Matthew Auld a5ef563b1d drm/xe/device: fix XE_MAX_GT_PER_TILE check
Here XE_MAX_GT_PER_TILE is the total, therefore the gt index should
always be less than.

Fixes: dd08ebf6c3 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240318180532.57522-5-matthew.auld@intel.com
2024-03-19 08:47:49 +00:00
Thomas Hellström f1a9abc0cf drm/xe/uapi: Remove support for persistent exec_queues
Persistent exec_queues delays explicit destruction of exec_queues
until they are done executing, but destruction on process exit
is still immediate. It turns out no UMD is relying on this
functionality, so remove it. If there turns out to be a use-case
in the future, let's re-add.

Persistent exec_queues were never used for LR VMs

v2:
- Don't add an "UNUSED" define for the missing property
  (Lucas, Rodrigo)
v3:
- Remove the remaining struct xe_exec_queue::persistent state
  (Niranjana, Lucas)

Fixes: dd08ebf6c3 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240209113444.8396-1-thomas.hellstrom@linux.intel.com
2024-02-19 12:54:48 +01:00
José Roberto de Souza 5746eaaa80 drm/xe: Add functions to convert regular address to canonical address and back
Some instructions requires canonical address like
MI_BATCH_BUFFER_START(UMDs must call xe_exec with a canonical address
for Xe2+).

So here adding functions to convert regular address to canonical
address and back, the first user of this functions will be added
in the next patch.

v3:
- inline removed
- rename highest_address_bit_get() to ppgtt_msb_get()

v4:
- use xe->info.va_bits instead of xe->info.dma_mask_size

BSpec: 47626
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Maarten Lankhorst <dev@lankhorst.se>
Cc: Stuart Summers <stuart.summers@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240130135648.30211-1-jose.souza@intel.com
2024-01-30 11:53:47 -08:00
José Roberto de Souza 4376cee620 drm/xe: Print more device information in devcoredump
To properly decode batch buffer Mesa tools needs to know what
platform is this one, for now we can do that with PCI id but
already making it future proof by also printing GTs GMD version.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Maarten Lankhorst <dev@lankhorst.se>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240123204454.246788-5-jose.souza@intel.com
2024-01-24 11:08:25 -08:00
Michal Wajdeczko a6581ebe76 drm/xe/vf: Introduce Memory Based Interrupts Handler
The register based interrupts infrastructure does not scale
efficiently to allow delivering interrupts to a large number
of virtual machines. Memory based interrupt reporting provides
an efficient and scalable infrastructure.

Define handler to read and dispatch memory based interrupts.
We will use this handler in upcoming patch.

Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231214185955.1791-8-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
2023-12-21 16:31:29 -05:00
Michał Winiarski 4f122766f9 drm/xe/device: Introduce xe_device_probe_early
SR-IOV VF doesn't have access to MMIO registers used to determine
graphics/media ID. It can however communicate with GuC.
Introduce xe_device_probe_early, which initializes enough HW to use
MMIO GuC communication.
This will allow both VF and PF/native driver to have unified probe
ordering.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:45:11 -05:00
Michal Wajdeczko d6d14854dd drm/xe: Add device flag to indicate SR-IOV support
The Single Root I/O Virtualization (SR-IOV) extension to
the PCI Express (PCIe) specification suite is supported
starting from 12th generation of Intel Graphics processors.

Add a device flag that we will use to enable SR-IOV specific
code paths and to indicate our readiness to support SR-IOV.

We will enable this flag for the specific platforms once all
required changes and additions will be ready and merged.

Bspec: 52391
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231115073804.1861-1-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:44:57 -05:00
Daniele Ceraolo Spurio c4991ee01d drm/xe/uc: Rename guc_submission_enabled() to uc_enabled()
The guc_submission_enabled() function is being used as a boolean toggle
for all firmwares and all related features, not just GuC submission. We
could add additional flags/functions to distinguish and allow different
use-cases (e.g. loading HuC but not using GuC submission), but given
that not using GuC is a debug-only scenario having a global switch for
all FWs is enough. However, we want to make it clear that this switch
turns off everything, so rename it to uc_enabled().

v2: rebase on s/XE_WARN_ON/xe_assert

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:41:13 -05:00
Francois Dugast 9b9529ce37 drm/xe: Rename engine to exec_queue
Engine was inappropriately used to refer to execution queues and it
also created some confusion with hardware engines. Where it applies
the exec_queue variable name is changed to q and comments are also
updated.

Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/162
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:39:20 -05:00
Rodrigo Vivi c8dc154648 drm/xe: Invert guc vs execlists parameters and info.
The module parameter should reflect the name of the optional,
experimental and unsafe option, rather than the default one.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
2023-12-21 11:37:54 -05:00
Matthew Auld 9700a1df0a drm/xe: add lockdep annotation for xe_device_mem_access_put()
The main motivation is with d3cold which will make the suspend and
resume callbacks even more scary, but is useful regardless. We already
have the needed annotation on the acquire side with
xe_device_mem_access_get(), and by adding the annotation on the release
side we should have a lot more confidence that our locking hierarchy is
correct.

v2:
  - Move the annotation into both callbacks for better symmetry. Also
    don't hold over the entire mem_access_get(); we only need to lockep
    to understand what is being held upon entering mem_access_get(), and
    how that matches up with locks in the callbacks.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:37:53 -05:00
Matthew Auld a00b8f1aae drm/xe: fix xe_device_mem_access_get() races
It looks like there is at least one race here, given that the
pm_runtime_suspended() check looks to return false if we are in the
process of suspending the device (RPM_SUSPENDING vs RPM_SUSPENDED).  We
later also do xe_pm_runtime_get_if_active(), but since the device is
suspending or has now suspended, this doesn't do anything either.
Following from this we can potentially return from
xe_device_mem_access_get() with the device suspended or about to be,
leading to broken behaviour.

Attempt to fix this by always grabbing the runtime ref when our internal
ref transitions from 0 -> 1. The hard part is then dealing with the
runtime_pm callbacks also calling xe_device_mem_access_get() and
deadlocking, which the pm_runtime_suspended() check prevented.

v2:
 - ct->lock looks to be primed with fs_reclaim, so holding that and then
   allocating memory will cause lockdep to complain. Now that we
   unconditionally grab the mem_access.lock around mem_access_{get,put}, we
   need to change the ordering wrt to grabbing the ct->lock, since some of
   the runtime_pm routines can allocate memory (or at least that's what
   lockdep seems to suggest). Hopefully not a big deal.  It might be that
   there were already issues with this, just that the atomics where
   "hiding" the potential issues.
v3:
 - Use Thomas Hellström' idea with tracking the active task that is
   executing in the resume or suspend callback, in order to avoid
   recursive resume/suspend calls deadlocking on itself.
 - Split the ct->lock change.
v4:
 - Add smb_mb() around accessing the pm_callback_task for extra safety.
   (Thomas Hellström)
v5:
 - Clarify the kernel-doc for the mem_access.lock, given that it is quite
   strange in what it protects (data vs code). The real motivation is to
   aid lockdep. (Rodrigo Vivi)
v6:
 - Split out the lock change. We still want this as a lockdep aid but
   only for the xe_device_mem_access_get() path. Sticking a lock on the
   put() looks be a no-go, also the runtime_put() there is always async.
 - Now that the lock is gone move to atomics and rely on the pm code
   serialising multiple callers on the 0 -> 1 transition.
 - g2h_worker_func() looks to be the next issue, given that
   suspend-resume callbacks are using CT, so try to handle that.
v7:
 - Add xe_device_mem_access_get_if_ongoing(), and use it in
   g2h_worker_func().
v8 (Anshuman):
 - Just always grab the rpm, instead of just on the 0 -> 1 transition,
   which is a lot clearer and simplifies the code quite a bit.
v9:
 - Make sure we also adjust the CT fast-path with if-active.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/258
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Acked-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:37:35 -05:00
Francois Dugast 4ab5901cc0 drm/xe: Cleanup POINTER_LOCATION style issues
Remove all existing style issues of type POINTER_LOCATION reported
by checkpatch.

Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:37:30 -05:00
Francois Dugast 4cd6d49259 drm/xe: Cleanup SPACING style issues
Remove almost all existing style issues of type SPACING reported
by checkpatch.

Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:37:30 -05:00
Matthew Auld c4bbc32e09 drm/xe: hold mem_access.ref for CT fast-path
Just checking xe_device_mem_access_ongoing() is not enough, we also need
to hold the reference otherwise the ref can transition from 1 -> 0 as we
enter g2h_read(), leading to warnings. While we can't do a full rpm sync
in the IRQ, we can keep the device awake if the ref is non-zero.
Introduce a new helper for this and set it to work in for the CT
fast-path.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-21 11:35:22 -05:00
Matt Roper 37efea9ca2 drm/xe: Allow GT looping and lookup on standalone media
Allow xe_device_get_gt() and for_each_gt() to operate as expected on
platforms with standalone media.

FIXME: We need to figure out a consistent ID scheme for GTs.  This patch
keeps the pre-existing behavior of 0/1 being the GT IDs for both PVC
(multi-tile) and MTL (multi-GT), but depending on the direction we
decide to go with uapi, we may change this in the future (e.g., to
return 0/1 on PVC and 0/2 on MTL).  Or if we decide we only need to
expose tiles to userspace and not GTs, we may not even need ID numbers
for the GTs anymore.

v2:
 - Restructure a bit to make the assertions more clear.
 - Clarify in commit message that the goal here is to preserve existing
   behavior; UAPI-visible changes may be introduced in the future once
   we settle on what we really want.
v3:
 - Store total GT count in xe_device for ease of lookup.  (Brian)
 - s/(id__++)/(id__)++/  (Gustavo)

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Cc: Brian Welty <brian.welty@intel.com>
Acked-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-29-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:34:20 -05:00
Matt Roper f6929e80cd drm/xe: Allocate GT dynamically
In preparation for re-adding media GT support, switch the primary GT
within the tile to a dynamic allocation.

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-19-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:34:15 -05:00
Matt Roper ed006ba5e6 drm/xe: Clarify 'gt' retrieval for primary tile
There are a bunch of places in the driver where we need to perform
non-GT MMIO against the platform's primary tile (display code, top-level
interrupt enable/disable, driver initialization, etc.).  Rename
'to_gt()' to 'xe_primary_mmio_gt()' to clarify that we're trying to get
a primary MMIO handle for these top-level operations.

In the future we need to move away from xe_gt as the target for MMIO
operations (most of which are completely unrelated to GT).

v2:
 - s/xe_primary_mmio_gt/xe_root_mmio_gt/ for more consistency with how
   we refer to tile 0.  (Lucas)
v3:
 - Tweak comment on xe_root_mmio_gt().  (Lucas)

Acked-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-16-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:34:15 -05:00
Matt Roper 3643e63715 drm/xe: Add for_each_tile iterator
As we start splitting tile handling out from GT handling, we'll need to
be able to iterate over tiles separately from GTs.  This iterator will
be used in upcoming patches.

v2:
 - s/(id__++)/(id__)++/  (Gustavo)

Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-6-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:34:11 -05:00
Matt Roper a5edc7cdb3 drm/xe: Introduce xe_tile
Create a new xe_tile structure to begin separating the concept of "tile"
from "GT."  A tile is effectively a complete GPU, and a GT is just one
part of that.  On platforms like MTL, there's only a single full GPU
(tile) which has its IP blocks provided by two GTs.  In contrast, a
"multi-tile" platform like PVC is basically multiple complete GPUs
packed behind a single PCI device.

For now, just create xe_tile as a simple wrapper around xe_gt.  The
items in xe_gt that are truly tied to the tile rather than the GT will
be moved in future patches.  Support for multiple GTs per tile (i.e.,
the MTL standalone media case) will also be re-introduced in a future
patch.

v2:
 - Fix kunit test build
 - Move hunk from next patch to use local tile variable rather than
   direct xe->tiles[id] accesses.  (Lucas)
 - Mention compute in kerneldoc.  (Rodrigo)

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230601215244.678611-3-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:34:11 -05:00
Chang, Bruce 1a545ed74b drm/xe: fix pvc unload issue
Currently, unload pvc driver will generate a null dereference
and the call stack is as below.

[ 4850.618000] Call Trace:
[ 4850.620740]  <TASK>
[ 4850.623134]  ttm_bo_cleanup_memtype_use+0x3f/0x50 [ttm]
[ 4850.628661]  ttm_bo_release+0x154/0x2c0 [ttm]
[ 4850.633317]  ? drm_buddy_fini+0x62/0x80 [drm_buddy]
[ 4850.638487]  ? __kmem_cache_free+0x27d/0x2c0
[ 4850.643054]  ttm_bo_put+0x38/0x60 [ttm]
[ 4850.647190]  xe_gem_object_free+0x1f/0x30 [xe]
[ 4850.651945]  drm_gem_object_free+0x1e/0x30 [drm]
[ 4850.656904]  ggtt_fini_noalloc+0x9d/0xe0 [xe]
[ 4850.661574]  drm_managed_release+0xb5/0x150 [drm]
[ 4850.666617]  drm_dev_release+0x30/0x50 [drm]
[ 4850.671209]  devm_drm_dev_init_release+0x3c/0x60 [drm]

There are a couple issues, but the main one is due to TTM has only
one TTM_PL_TT region, but since pvc has 2 tiles and tries to setup
1 TTM_PL_TT each tile. The second will overwrite the first one.

During unload time, the first tile will reset the TTM_PL_TT manger
and when the second tile is trying to free Bo and it will generate
the null reference since the TTM manage is already got reset to 0.

The fix is to use one global TTM_PL_TT manager.

v2: make gtt mgr global and change the name to sys_mgr

Cc: Stuart Summers <stuart.summers@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Vivi, Rodrigo <rodrigo.vivi@intel.com>
Signed-off-by: Bruce Chang <yu.bruce.chang@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:31:30 -05:00
Maarten Lankhorst 38c04b47ce drm/xe: Use atomic instead of mutex for xe_device_mem_access_ongoing
xe_guc_ct_fast_path() is called from an irq context, and cannot lock
the mutex used by xe_device_mem_access_ongoing().

Fortunately it is easy to fix, and the atomic guarantees are good enough
to ensure xe->mem_access.hold_rpm is set before last ref is dropped.

As far as I can tell, the runtime ref in device access should be
killable, but don't dare to do it yet.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:30:20 -05:00
Lucas De Marchi 541623a406 drm/xe: Fix typo persitent->persistent
Fix typo as noticed by Matt Roper:

	git grep -l persitent | xargs sed -i 's/persitent/persistent/g'

... and then fix coding style issues.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://lore.kernel.org/r/20230302013411.3262608-2-lucas.demarchi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:29:43 -05:00
Lucas De Marchi 63955b3bfa drm/xe: Remove dependency on intel_gpu_commands.h
Copy the macros used by xe in intel_gpu_commands.h to
regs/xe_gpu_commands.h. PIPE_CONTROL_3D_ENGINE_FLAGS and
PIPE_CONTROL_3D_ARCH_FLAGS were already defined in
drivers/gpu/drm/xe/xe_ring_ops.c and only used there. So let that define
to be used instead of also adding to the new header.

v2: Let PIPE_CONTROL_3D_ENGINE_FLAGS/PIPE_CONTROL_3D_ARCH_FLAGS in the
    only .c that uses it instead of redefining (Matt Roper)

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:29:21 -05:00
Lucas De Marchi ea9f879d03 drm/xe: Sort includes
Sort includes and split them in blocks:

1) .h corresponding to the .c. Example: xe_bb.c should have a "#include
   "xe_bb.h" first.
2) #include <linux/...>
3) #include <drm/...>
4) local includes
5) i915 includes

This is accomplished by running
`clang-format --style=file -i --sort-includes drivers/gpu/drm/xe/*.[ch]`
and ignoring all the changes after the includes. There are also some
manual tweaks to split the blocks.

v2: Also sort includes in headers

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-12-19 18:29:20 -05:00
Matthew Brost dd08ebf6c3 drm/xe: Introduce a new DRM driver for Intel GPUs
Xe, is a new driver for Intel GPUs that supports both integrated and
discrete platforms starting with Tiger Lake (first Intel Xe Architecture).

The code is at a stage where it is already functional and has experimental
support for multiple platforms starting from Tiger Lake, with initial
support implemented in Mesa (for Iris and Anv, our OpenGL and Vulkan
drivers), as well as in NEO (for OpenCL and Level0).

The new Xe driver leverages a lot from i915.

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there. But it is not added
in this patch.

This initial work is a collaboration of many people and unfortunately
the big squashed patch won't fully honor the proper credits. But let's
get some git quick stats so we can at least try to preserve some of the
credits:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Matthew Auld <matthew.auld@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Co-developed-by: Francois Dugast <francois.dugast@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Co-developed-by: Philippe Lecluse <philippe.lecluse@intel.com>
Co-developed-by: Nirmoy Das <nirmoy.das@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: José Roberto de Souza <jose.souza@intel.com>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Co-developed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Co-developed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
2023-12-12 14:05:48 -05:00