linux-toradex.git/include/drm/ttm, branch v5.15-rc5

drm/ttm: Include pagemap.h from ttm_tt.h

2021-08-16T12:44:05+00:00

It's needed for pgprot_t which is used in the header.

Signed-off-by: Jason Ekstrand 
Cc: Christian König 
Link: https://patchwork.freedesktop.org/patch/msgid/20210812203443.1725307-2-jason@jlekstrand.net
Reviewed-by: Christian König 
Signed-off-by: Christian König

drm/ttm: ttm_bo_device is now ttm_device

2021-08-16T12:43:12+00:00

These names were changed in

commit 8af8a109b34fa88b8b91f25d11485b37d37549c3
Author: Christian König 
Date:   Thu Oct 1 14:51:40 2020 +0200

    drm/ttm: device naming cleanup

But he missed a couple of them.

Signed-off-by: Jason Ekstrand 
Cc: Christian König 
Fixes: 8af8a109b34f ("drm/ttm: device naming cleanup")
Link: https://patchwork.freedesktop.org/patch/msgid/20210812203443.1725307-1-jason@jlekstrand.net
Reviewed-by: Christian König 
Signed-off-by: Christian König

drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3

2021-06-23T18:59:39+00:00

Sometimes drivers need to use bounce buffers to evict BOs. While those reside
in some domain they are not necessarily suitable for CS.

Add a flag so that drivers can note that a bounce buffers needs to be
reallocated during validation.

v2: add detailed comments
v3 (chk): merge commits and rework commit message

Suggested-by: Christian König 
Signed-off-by: Lang Yu 
Signed-off-by: Christian König 
Signed-off-by: Andrey Grodzovsky 
Acked-by: Nirmoy Das 
Link: https://patchwork.freedesktop.org/patch/msgid/20210622162339.761651-1-andrey.grodzovsky@amd.com

drm/ttm: Document and optimize ttm_bo_pipeline_gutting()

2021-06-07T14:07:08+00:00

If the bo is idle when calling ttm_bo_pipeline_gutting(), we unnecessarily
create a ghost object and push it out to delayed destroy.
Fix this by adding a path for idle, and document the function.

Also avoid having the bo end up in a bad state vulnerable to user-space
triggered kernel BUGs if the call to ttm_tt_create() fails.

Finally reuse ttm_bo_pipeline_gutting() in ttm_bo_evict().

Cc: Christian König 
Signed-off-by: Thomas Hellström 
Reviewed-by: Christian König 
Link: https://lore.kernel.org/r/20210602083818.241793-7-thomas.hellstrom@linux.intel.com

drm/ttm: Add a generic TTM memcpy move for page-based iomem

2021-06-07T14:07:08+00:00

The internal ttm_bo_util memcpy uses ioremap functionality, and while it
probably might be possible to use it for copying in- and out of
sglist represented io memory, using io_mem_reserve() / io_mem_free()
callbacks, that would cause problems with fault().
Instead, implement a method mapping page-by-page using kmap_local()
semantics. As an additional benefit we then avoid the occasional global
TLB flushes of ioremap() and consuming ioremap space, elimination of a
critical point of failure and with a slight change of semantics we could
also push the memcpy out async for testing and async driver development
purposes.

A special linear iomem iterator is introduced internally to mimic the
old ioremap behaviour for code-paths that can't immediately be ported
over. This adds to the code size and should be considered a temporary
solution.

Looking at the code we have a lot of checks for iomap tagged pointers.
Ideally we should extend the core memremap functions to also accept
uncached memory and kmap_local functionality. Then we could strip a
lot of code.

Cc: Christian König 
Signed-off-by: Thomas Hellström 
Reviewed-by: Christian König 
Link: https://lore.kernel.org/r/20210602083818.241793-4-thomas.hellstrom@linux.intel.com

drm/ttm: flip the switch for driver allocated resources v2

2021-06-04T13:16:46+00:00

Instead of both driver and TTM allocating memory finalize embedding the
ttm_resource object as base into the driver backends.

v2: fix typo in vmwgfx grid mgr and double init in amdgpu_vram_mgr.c

Signed-off-by: Christian König 
Reviewed-by: Matthew Auld 
Link: https://patchwork.freedesktop.org/patch/msgid/20210602100914.46246-10-christian.koenig@amd.com

drm/ttm: flip over the range manager to self allocated nodes

2021-06-04T13:16:45+00:00

Start with the range manager to make the resource object the base
class for the allocated nodes.

While at it cleanup a lot of the code around that.

Signed-off-by: Christian König 
Reviewed-by: Matthew Auld 
Link: https://patchwork.freedesktop.org/patch/msgid/20210602100914.46246-2-christian.koenig@amd.com

drm/ttm: allocate resource object instead of embedding it v2

2021-06-04T13:16:45+00:00

To improve the handling we want the establish the resource object as base
class for the backend allocations.

v2: add missing error handling

Signed-off-by: Christian König 
Acked-by: Thomas Hellström 
Link: https://patchwork.freedesktop.org/patch/msgid/20210602100914.46246-1-christian.koenig@amd.com

drm/ttm: rename bo->mem and make it a pointer

2021-06-02T09:07:25+00:00

When we want to decouble resource management from buffer management we need to
be able to handle resources separately.

Add a resource pointer and rename bo->mem so that all code needs to
change to access the pointer instead.

No functional change.

Signed-off-by: Christian König 
Reviewed-by: Matthew Auld 
Link: https://patchwork.freedesktop.org/patch/msgid/20210430092508.60710-4-christian.koenig@amd.com

drm/ttm: Remove ttm_bo_mmap() and friends

2021-05-26T18:56:56+00:00

The function ttm_bo_mmap is unused. Remove it and it's helpers; including
the verify_access callback in struct ttm_device_funcs.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Christian König 
Link: https://patchwork.freedesktop.org/patch/msgid/20210525151055.8174-8-tzimmermann@suse.de