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At present, dma_buf_export() takes a series of parameters, which
makes it difficult to add any new parameters for exporters, if required.
Make it simpler by moving all these parameters into a struct, and pass
the struct * as parameter to dma_buf_export().
While at it, unite dma_buf_export_named() with dma_buf_export(), and
change all callers accordingly.
Reviewed-by: Maarten Lankhorst <[email protected]>
Reviewed-by: Daniel Thompson <[email protected]>
Acked-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Dave Airlie <[email protected]>
Signed-off-by: Sumit Semwal <[email protected]>
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This allows reservation objects to be used in dma-buf. it's required
for implementing polling support on the fences that belong to a dma-buf.
Signed-off-by: Maarten Lankhorst <[email protected]>
Acked-by: Mauro Carvalho Chehab <[email protected]> #drivers/media/v4l2-core/
Acked-by: Thomas Hellstrom <[email protected]> #drivers/gpu/drm/ttm
Acked-by: Sumit Semwal <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Signed-off-by: Vincent Stehlé <[email protected]> #drivers/gpu/drm/armada/
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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A function to be used to check whether a caller has put a ref object
(opened) a struct ttm_base_object
Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
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Commit drm/ttm: ttm object security fixes for render nodes introduced a
regression where, if a TTM object was opened multiple times from the same
open file, the caller would spin uninterruptibly in the kernel.
Fix this.
Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Jakob Bornecrantz <[email protected]>
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When a client looks up a ttm object, don't look it up through the device hash
table, but rather from the file hash table. That makes sure that the client
has indeed put a reference on the object, or in gem terms, has opened
the object; either using prime or using the global "name".
To avoid a performance loss, make sure the file hash table entries can be
looked up from under an RCU lock, and as a consequence, replace the rwlock
with a spinlock, since we never need to take it in read mode only anymore.
Finally add a ttm object lookup function for the device hash table, that is
intended to be used when we put a ref object on a base object or, in gem terms,
when we open the object.
Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
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Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Jakob Bornecrantz <[email protected]>
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Fix uninitialized warning.
drivers/gpu/drm/ttm/ttm_object.c: In function ‘ttm_base_object_lookup’:
drivers/gpu/drm/ttm/ttm_object.c:213:10: error: ‘base’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
kref_put(&base->refcount, ttm_release_base);
^
drivers/gpu/drm/ttm/ttm_object.c:221:26: note: ‘base’ was declared here
struct ttm_base_object *base;
Signed-off-by: Prarit Bhargava <[email protected]>
Reviewed-by: Rob Clark <[email protected]>
Reviewed-by: David Herrmann <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Also move a kref_init() out of spinlocked region
Signed-off-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Signed-off-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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The mostly used lookup+get put+potential_destroy path of TTM objects
is converted to use RCU locks. This will substantially decrease the amount
of locked bus cycles during normal operation.
Since we use kfree_rcu to free the objects, no rcu synchronization is needed
at module unload time.
v2: Don't touch include/linux/kref.h
v3: Adapt to kref_get_unless_zero return value change
Signed-off-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Convert #include "..." to #include <path/...> in drivers/gpu/.
Signed-off-by: David Howells <[email protected]>
Acked-by: Dave Airlie <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Acked-by: Dave Jones <[email protected]>
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Use the more current logging style.
Add pr_fmt and remove the TTM_PFX uses.
Coalesce formats and align arguments.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>
Signed-off-by: Arun Sharma <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: David Miller <[email protected]>
Cc: Eric Dumazet <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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There's no need to pass kref_put() the address of a function (just the
function will do just fine) nor to cast its unused return to void.
Signed-off-by: Paul Bolle <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
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Re-order structure ttm_ref_object to remove 8 bytes of alignment padding
on 64 bit builds, so shrinking its size from 72 to 64 bytes allowing it
to fit into a smaller slab.
Signed-off-by: Richard Kennedy <[email protected]>
Acked-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Add objects needed for user-space to maintain reference counts on ttm objects.
This is used by the vmwgfx driver which allows user-space to maintain
map-counts on dma buffers, lock-counts on the ttm lock and ref-counts on
gpu surfaces, gpu contexts and dma buffer.
Signed-off-by: Thomas Hellstrom <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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