linux-toradex.git/drivers/gpu/drm/etnaviv/etnaviv_buffer.c, branch v4.14-rc3

drm/etnaviv: wire up iova handling in new cmdbuf abstraction

2017-02-02T09:30:20+00:00

Don't call the IOMMU directly, but go through the new cmdbuf abstraction.

Signed-off-by: Lucas Stach 
Reviewed-by: Christian Gmeiner

drm/etnaviv: move cmdbuf de-/allocation into own file

2017-02-02T09:30:15+00:00

This will get more complex with the following changes, so move it
into its own place.

Signed-off-by: Lucas Stach 
Reviewed-by: Christian Gmeiner

drm/etnaviv: ensure write caches are flushed at end of user cmdstream

2016-10-10T13:26:38+00:00

If the GPU is done with one user command stream the buffers referenced
by this command stream may go away and get unmapped from the MMU. If
the write caches are still dirty at this point later evictions will run
into MMU faults, killing the GPU.

Make sure the write caches are flushed before signaling completion
of the user command stream.

Signed-off-by: Lucas Stach

drm/etnaviv: add flushing logic for MMUv2

2016-09-15T13:29:41+00:00

Flushing works differently on MMUv2, in that it's only necessary
to set a single bit in the control register to flush all translation
units. A semaphore stall then makes sure that the flush has propagated
properly.

Signed-off-by: Lucas Stach

drm/etnaviv: add function to construct MMUv2 init buffer

2016-09-15T13:29:41+00:00

Both the safe/scratch address and the master TLB address are per pipe
with the CPU mapped registers not properly propagating to the
different translation units.

The only way to correctly configure all translation units is to have
a command stream snipped executed by the FE, before any other execution
can start.

Signed-off-by: Lucas Stach

drm/etnaviv: move gpu_va() to etnaviv mmu

2016-09-15T13:29:37+00:00

The GPU virtual address for the command buffers differs depending on
the IOMMU version. Move the calculation of the iova into etnaviv
mmu, to enable proper dispatch.

Signed-off-by: Lucas Stach

drm: etnaviv: improve readability of command insertion to ring buffer

2016-03-07T14:36:59+00:00

Improve the readibility of the function which inserts command buffers
and other maintanence commands into the GPUs ring buffer.  We do this
by splitting the ring buffer reservation in two: one chunk for any
commands that need to be issued prior to the command buffer, and a
separate chunk for commands issued after the buffer.

The result is a much more obvious code flow in this function, and
localisation of the conditional maintanence commands prior to the
command buffer.

Signed-off-by: Russell King 
Signed-off-by: Lucas Stach

drm: etnaviv: clean up GPU command submission

2016-03-07T14:36:58+00:00

Clean up the GPU command submission path to prepare for the next change.
This makes the next change easier to read and understand.

Signed-off-by: Russell King 
Signed-off-by: Lucas Stach

drm: etnaviv: use previous GPU pipe state when pipe switching

2016-03-07T14:36:57+00:00

Use the previous GPU pipe state when deciding which GPU caches should
be flushed prior to switching the current pipe.  This avoids infering
what the previously selected pipe was, and potentially flushing the
wrong caches.

Signed-off-by: Russell King 
Signed-off-by: Lucas Stach

drm: etnaviv: flush all GPU caches when stopping GPU

2016-03-07T14:36:56+00:00

Flush the GPU caches to ensure that any dirty data is pushed out before
stopping the front end.

Signed-off-by: Russell King 
Signed-off-by: Lucas Stach