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b0328087c1
This patch adds suspend support for gfx userqueues. It typically does
the following:
- adds an enable_signaling function for the eviction fence, so that it
can trigger the userqueue suspend,
- adds a delayed work to handle suspending of the eviction_fence
- adds a suspend function to handle suspending of userqueues which
suspends all the queues under this userq manager and signals the
eviction fence,
- adds a function to replace the old eviction fence with a new one and
attach it to each of the objects,
- adds reference of userq manager in the eviction fence container so
that it can be used in the suspend function.
V2: Addressed Christian's review comments:
- schedule suspend work immediately
V4: Addressed Christian's review comments:
- wait for pending uq fences before starting suspend, added
queue->last_fence for the same
- accommodate ev_fence_mgr into existing code
- some bug fixes and NULL checks
V5: Addressed Christian's review comments (gitlab)
- Wait for eviction fence to get signaled in destroy,
don't signal it
- Wait for eviction fence to get signaled in replace fence,
don't signal it
V6: Addressed Christian's review comments
- Do not destroy the old eviction fence until we have it replaced
- Change the sequence of fence replacement sub-tasks
- reusing the ev_fence delayed work for userqueue suspend as well
(Shashank).
V7: Addressed Christian's review comments
- give evf_mgr as argument (instead of fpriv) to replace_fence()
- save ptr to evf_mgr in ev_fence (instead of uq_mgr)
- modify suspend_all_queues logic to reflect error properly
- remove the garbage drm_exec_lock section in wait_for_signal
- grab the userqueue mutex before starting the wait for fence
- remove the unrelated gobj check from signal_ioctl
V8: Added race condition fixes
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Acked-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.