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Buffer object specific resources like pages, domains, sg list
need not be protected with struct_mutex. They can be protected
with a buffer object level lock. This simplifies locking and
makes it easier to avoid potential recursive locking scenarios
for SVM involving mmap_sem and struct_mutex. This also removes
unnecessary serialization when creating buffer objects, and also
between buffer object creation and GPU command submission.
Signed-off-by: Sushmita Susheelendra <ssusheel@codeaurora.org>
[robclark: squash in handling new locking for shrinker]
Signed-off-by: Rob Clark <robdclark@gmail.com>
Output the upper 32 bits of a 64 bit iova in the RD_CMDSTREAM_ADDR
section while maintaining backwards compatibility for tools that
only understand 32 bit iovas.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
copy_to/from_user returns the number of bytes remaining to be copied but
we want to return -EFAULT.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
By default, if using $debugfs/.../rd to log cmdstream, only the
cmdstream buffers themselves are logged. But in some cases we want
to capture other buffers in the submit (to see VBO's or shaders).
So add a mod-param knob to control this.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Before we can add vmap shrinking, we really need to know which vmap'ings
are currently being used. So switch to get/put interface. Stubbed put
fxns for now.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Some, but not all, callers of obj->vmap() would check if return
IS_ERR(). So let's actually return an error if vmap() fails. And fixup
the call-sites that were not handling this properly.
Signed-off-by: Rob Clark <robdclark@gmail.com>
To ease debugging, add debugfs file which can be cat/tail'd to log
submits, along with fence #. If GPU hangs, you can look at 'gpu'
debugfs file to find last completed fence and current register state,
and compare with logged rd file to narrow down the DRAW_INDX which
triggered the GPU hang.
Signed-off-by: Rob Clark <robdclark@gmail.com>
