According to the kernel documentation:
Returns non-zero if @v was not @u, and zero otherwise.
Fixes: 63fc571863 ("atomic: add atomic_add_unless()")
Closes: https://gitlab.freedesktop.org/mesa/drm/issues/17
Signed-off-by: David Shao <davshao@gmail.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
[Eric: fix its callers to maintain current behaviour]
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Since AO_compare_and_swap_full() is used by libdrm, AO_REQUIRE_CAS
must be defined before including <atomic_ops.h> so that we are sure
that CAS support will be provided. This is necessary to make sure that
the AO_compare_and_swap_full() function will be provided on all
architectures, including the ones that don't have built-in CAS support
such as SPARCv8.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Acked-by: Eric Engestrom <eric.engestrom@intel.com>
This reverts 6d2379857b "xf86atomic: #undef internal define"
and b541d21a0a "freedreno: remove always-defined #ifdef".
I didn't realise at the time that freedreno/freedreno_ringbuffer.h gets
installed, and then used by Mesa for instance. These two commits were
fine in libdrm, but broke Mesa which needs to use struct fd_ringbuffer
but doesn't need to access ::refcnt. The hack that I removed serves to
keep the struct at the correct size while only exposing the ::refcnt
member within libdrm.
Fixes: 6d2379857b "xf86atomic: #undef internal define"
Fixes: b541d21a0a "freedreno: remove always-defined #ifdef"
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Thanks to the #error just above, any file including this header can only
see one state for this macro: defined, with the value `1`.
Let's just #undef it once we're done using it in here so that other
files don't misconstrue any meaning to it.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
This will prevent any more missing `#include "config.h"` bug, at the
cost of having to recompile some files that didn't need to be when
changing build options.
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Since the atomic_set() macro references _ATOMIC_TYPE, undefining it
broke that macro, resulting in build errors of:
"intel_bufmgr_gem.c", line 775: undefined symbol: _ATOMIC_TYPE
Now that we're leaving the macro in the namespace, renamed it to start
with LIBDRM_ instead of _ to avoid polluting others namespace.
Regression introduced in 87fdd32c87 Add NetBSD atomic ops support.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-By: Thomas Klausner <wiz@NetBSD.org>
_nv means new value, not old value!
Signed-off-by: Thomas Klausner <wiz@NetBSD.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@ubuntu.com>
bo->referenced_in_cs is checked if bo is already in cs. Adding and removing
reference in bo is done with atomic operations to allow parallel access to a
bo from multiple contexts.
cs->id generation code quarentees there is not duplicated ids which limits
number of cs->ids to 32. If there is more cs objects rest will get id 0.
V2:
- Fix configure to check for atomics operations if libdrm_radeon is only selected.
- Make atomic operations private to libdrm.
This optimization decreases cs_write_reloc share of torcs profiling from 4.3%
to 2.6%.
Tested-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
intel_atomic.h includes very usefull atomic operations for
lock free parrallel access of variables. Moving these to
core libdrm for code sharing with radeon.
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Eric Engestrom
Thomas Petazzoni
Eric Engestrom
Eric Engestrom
Emil Velikov
Maarten Lankhorst
Alan Coopersmith
Thomas Klausner
Lionel Landwerlin
Pauli Nieminen