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Thu, 05 Nov 2026 04:06:27 -0800 (PST) Received: from [192.168.0.116] ([81.79.79.1]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48fec9cd40csm9652219f8f.13.2026.11.05.04.06.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Nov 2026 04:06:26 -0800 (PST) Message-ID: <2f377d0f-2760-4465-ac68-b62210b33bd6@ursulin.net> Date: Thu, 5 Nov 2026 12:06:25 +0000 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] dma-buf: dma-fence: Add flags parameter to dma_fence_init() To: Philipp Stanner , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, amd-gfx@lists.freedesktop.org, etnaviv@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, imagination@lists.freedesktop.org, lima@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-iio@vger.kernel.org, linux-usb@vger.kernel.org, rust-for-linux@vger.kernel.or References: <20261105113529.1989375-2-phasta@kernel.org> <20261105113529.1989375-3-phasta@kernel.org> Content-Language: en-GB From: Tvrtko Ursulin In-Reply-To: <20261105113529.1989375-3-phasta@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit [I aggresively rewrote the To: list because my SMTP won't let me send this as it was.] On 05/11/2026 11:35, Philipp Stanner wrote: > Currently, there are two init functions for dma_fence, dma_fence_init() > and dma_fence_init64(). > > Since more future user options for dma_fence initialization would > require distinct init functions, too, it is better to do this in a > unified way. Why not add something like dma_fence_init_flags() and leave the 99% of the callers out of the (huge) diff? Ie. just port dma_fence_init64() to dma_fence_init_flags(). Also best to move the addition of dma_fence_flags_invalid() to the patch which adds dma_fence_init_flags() and not have it in this one which is supposed to be functionality neutral. Regards, Tvrtko > Add a flags field to dma_fence_init(). Adjust all affected drivers, > preserving the old behavior. > > Support the SEQNO64 flag, and add a check-function so that the user only > sets valid bits. > > Signed-off-by: Philipp Stanner > --- > drivers/accel/amdxdna/amdxdna_ctx.c | 2 +- > drivers/accel/ethosu/ethosu_job.c | 2 +- > drivers/accel/ivpu/ivpu_job.c | 2 +- > drivers/accel/rocket/rocket_job.c | 2 +- > drivers/dma-buf/dma-fence-array.c | 2 +- > drivers/dma-buf/dma-fence.c | 31 ++++++++++++++++--- > drivers/dma-buf/st-dma-fence-chain.c | 2 +- > drivers/dma-buf/st-dma-fence-unwrap.c | 2 +- > drivers/dma-buf/st-dma-fence.c | 2 +- > drivers/dma-buf/st-dma-resv.c | 2 +- > drivers/dma-buf/sw_sync.c | 2 +- > .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c | 2 +- > drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 2 +- > drivers/gpu/drm/drm_crtc.c | 2 +- > drivers/gpu/drm/drm_writeback.c | 2 +- > drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 +- > drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c | 2 +- > drivers/gpu/drm/i915/i915_request.c | 2 +- > drivers/gpu/drm/i915/i915_sw_fence_work.c | 2 +- > drivers/gpu/drm/i915/i915_vma_resource.c | 2 +- > .../gpu/drm/i915/selftests/i915_sw_fence.c | 2 +- > drivers/gpu/drm/imagination/pvr_ccb.c | 2 +- > drivers/gpu/drm/imagination/pvr_queue.c | 2 +- > drivers/gpu/drm/lima/lima_sched.c | 2 +- > drivers/gpu/drm/msm/msm_fence.c | 2 +- > drivers/gpu/drm/nouveau/nouveau_fence.c | 4 +-- > drivers/gpu/drm/panfrost/panfrost_job.c | 2 +- > drivers/gpu/drm/panthor/panthor_sched.c | 2 +- > drivers/gpu/drm/qxl/qxl_release.c | 2 +- > drivers/gpu/drm/radeon/radeon_fence.c | 2 +- > drivers/gpu/drm/scheduler/sched_fence.c | 4 +-- > .../gpu/drm/scheduler/tests/mock_scheduler.c | 2 +- > drivers/gpu/drm/ttm/tests/ttm_bo_test.c | 2 +- > .../gpu/drm/ttm/tests/ttm_bo_validate_test.c | 2 +- > drivers/gpu/drm/v3d/v3d_fence.c | 2 +- > drivers/gpu/drm/vc4/vc4_gem.c | 2 +- > drivers/gpu/drm/vgem/vgem_fence.c | 2 +- > drivers/gpu/drm/virtio/virtgpu_fence.c | 2 +- > drivers/gpu/drm/vmwgfx/vmwgfx_fence.c | 2 +- > drivers/gpu/drm/xe/xe_hw_fence.c | 2 +- > drivers/gpu/drm/xe/xe_oa.c | 2 +- > drivers/gpu/drm/xe/xe_preempt_fence.c | 2 +- > drivers/gpu/drm/xe/xe_tlb_inval.c | 2 +- > drivers/gpu/host1x/fence.c | 2 +- > drivers/iio/industrialio-buffer.c | 2 +- > drivers/usb/gadget/function/f_fs.c | 2 +- > include/linux/dma-fence.h | 12 +++++-- > rust/kernel/dma_buf/dma_fence.rs | 2 +- > 48 files changed, 83 insertions(+), 56 deletions(-) > > diff --git a/drivers/accel/amdxdna/amdxdna_ctx.c b/drivers/accel/amdxdna/amdxdna_ctx.c > index f4004630dc1b..f2245541f1ee 100644 > --- a/drivers/accel/amdxdna/amdxdna_ctx.c > +++ b/drivers/accel/amdxdna/amdxdna_ctx.c > @@ -53,7 +53,7 @@ static struct dma_fence *amdxdna_fence_create(struct amdxdna_hwctx *hwctx) > > spin_lock_init(&fence->lock); > /* Unique timeline context prevents eviction from shared BO reservation. */ > - dma_fence_init(&fence->base, &fence_ops, &fence->lock, dma_fence_context_alloc(1), 0); > + dma_fence_init(&fence->base, &fence_ops, &fence->lock, dma_fence_context_alloc(1), 0, 0); > return &fence->base; > } > > diff --git a/drivers/accel/ethosu/ethosu_job.c b/drivers/accel/ethosu/ethosu_job.c > index d656b3ec670e..d4fc71436cae 100644 > --- a/drivers/accel/ethosu/ethosu_job.c > +++ b/drivers/accel/ethosu/ethosu_job.c > @@ -219,7 +219,7 @@ static struct dma_fence *ethosu_job_run(struct drm_sched_job *sched_job) > return NULL; > > dma_fence_init(fence, ðosu_fence_ops, &dev->fence_lock, > - dev->fence_context, ++dev->emit_seqno); > + dev->fence_context, ++dev->emit_seqno, 0); > dma_fence_get(fence); > > ethosu_switch_perfmon(dev, job); > diff --git a/drivers/accel/ivpu/ivpu_job.c b/drivers/accel/ivpu/ivpu_job.c > index 76bacabe496b..6b4f059fb209 100644 > --- a/drivers/accel/ivpu/ivpu_job.c > +++ b/drivers/accel/ivpu/ivpu_job.c > @@ -519,7 +519,7 @@ static struct dma_fence *ivpu_fence_create(struct ivpu_device *vdev) > > fence->vdev = vdev; > spin_lock_init(&fence->lock); > - dma_fence_init(&fence->base, &ivpu_fence_ops, &fence->lock, dma_fence_context_alloc(1), 1); > + dma_fence_init(&fence->base, &ivpu_fence_ops, &fence->lock, dma_fence_context_alloc(1), 1, 0); > > return &fence->base; > } > diff --git a/drivers/accel/rocket/rocket_job.c b/drivers/accel/rocket/rocket_job.c > index b2a00992c889..574c9ea802c9 100644 > --- a/drivers/accel/rocket/rocket_job.c > +++ b/drivers/accel/rocket/rocket_job.c > @@ -61,7 +61,7 @@ static struct dma_fence *rocket_fence_create(struct rocket_core *core) > return ERR_PTR(-ENOMEM); > > dma_fence_init(fence, &rocket_fence_ops, &core->fence_lock, > - core->fence_context, ++core->emit_seqno); > + core->fence_context, ++core->emit_seqno, 0); > > return fence; > } > diff --git a/drivers/dma-buf/dma-fence-array.c b/drivers/dma-buf/dma-fence-array.c > index 5e10e8df372f..e2dddbfddea2 100644 > --- a/drivers/dma-buf/dma-fence-array.c > +++ b/drivers/dma-buf/dma-fence-array.c > @@ -205,7 +205,7 @@ void dma_fence_array_init(struct dma_fence_array *array, > array->num_fences = num_fences; > > dma_fence_init(&array->base, &dma_fence_array_ops, NULL, context, > - seqno); > + seqno, 0); > init_irq_work(&array->work, irq_dma_fence_array_work); > > /* > diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c > index bd58688b81a7..a511cf755ee8 100644 > --- a/drivers/dma-buf/dma-fence.c > +++ b/drivers/dma-buf/dma-fence.c > @@ -122,7 +122,7 @@ static const struct dma_fence_ops dma_fence_stub_ops = { > > static int __init dma_fence_init_stub(void) > { > - dma_fence_init(&dma_fence_stub, &dma_fence_stub_ops, NULL, 0, 0); > + dma_fence_init(&dma_fence_stub, &dma_fence_stub_ops, NULL, 0, 0, 0); > set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, > &dma_fence_stub.flags); > dma_fence_signal(&dma_fence_stub); > @@ -156,7 +156,7 @@ struct dma_fence *dma_fence_allocate_private_stub(ktime_t timestamp) > if (fence == NULL) > return NULL; > > - dma_fence_init(fence, &dma_fence_stub_ops, NULL, 0, 0); > + dma_fence_init(fence, &dma_fence_stub_ops, NULL, 0, 0, 0); > set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, > &fence->flags); > > @@ -1063,7 +1063,6 @@ __dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > spinlock_t *lock, u64 context, u64 seqno, unsigned long flags) > { > BUG_ON(!ops || !ops->get_driver_name || !ops->get_timeline_name); > - > kref_init(&fence->refcount); > /* > * While it is counter intuitive to protect a constant function pointer > @@ -1087,6 +1086,21 @@ __dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > trace_dma_fence_init(fence); > } > > +static bool dma_fence_flags_invalid(unsigned long flags) > +{ > + const unsigned long valid_fence_bits = > + BIT(DMA_FENCE_FLAG_SEQNO64_BIT); > + const unsigned long valid_user_bits = > + GENMASK( > + BITS_PER_TYPE(unsigned long) - 1, > + DMA_FENCE_FLAG_USER_BITS > + ); > + const unsigned long invalid_bits = > + ~(valid_fence_bits | valid_user_bits); > + > + return flags & invalid_bits; > +} > + > /** > * dma_fence_init - Initialize a custom fence. > * @fence: the fence to initialize > @@ -1094,6 +1108,7 @@ __dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > * @lock: optional irqsafe spinlock to use for locking this fence > * @context: the execution context this fence is run on > * @seqno: a linear increasing sequence number for this context > + * @flags: flags modifying a fence's behavior > * > * Initializes an allocated fence, the caller doesn't have to keep its > * refcount after committing with this fence, but it will need to hold a > @@ -1108,12 +1123,18 @@ __dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > * introduction of the callback, but the external lock is still around. New > * users MUST NOT use external locks, as they force the issuer to outlive all > * fences that reference the lock. > + * > + * The @flags you can specify here are either DMA_FENCE_FLAG_SEQNO64_BIT or > + * user-specified bits >= DMA_FENCE_FLAG_USER_BITS. > */ > void > dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > - spinlock_t *lock, u64 context, u64 seqno) > + spinlock_t *lock, u64 context, u64 seqno, > + unsigned long flags) > { > - __dma_fence_init(fence, ops, lock, context, seqno, 0UL); > + WARN_ON(dma_fence_flags_invalid(flags)); > + > + __dma_fence_init(fence, ops, lock, context, seqno, flags); > } > EXPORT_SYMBOL(dma_fence_init); > > diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c > index e0d9b69bfa76..b9610df3ff19 100644 > --- a/drivers/dma-buf/st-dma-fence-chain.c > +++ b/drivers/dma-buf/st-dma-fence-chain.c > @@ -52,7 +52,7 @@ static struct dma_fence *mock_fence(void) > return NULL; > > spin_lock_init(&f->lock); > - dma_fence_init(&f->base, &mock_ops, &f->lock, 0, 0); > + dma_fence_init(&f->base, &mock_ops, &f->lock, 0, 0, 0); > > return &f->base; > } > diff --git a/drivers/dma-buf/st-dma-fence-unwrap.c b/drivers/dma-buf/st-dma-fence-unwrap.c > index c5353b36f0e4..dbebc3046d42 100644 > --- a/drivers/dma-buf/st-dma-fence-unwrap.c > +++ b/drivers/dma-buf/st-dma-fence-unwrap.c > @@ -36,7 +36,7 @@ static struct dma_fence *__mock_fence(u64 context, u64 seqno) > return NULL; > > spin_lock_init(&f->lock); > - dma_fence_init(&f->base, &mock_ops, &f->lock, context, seqno); > + dma_fence_init(&f->base, &mock_ops, &f->lock, context, seqno, 0); > > return &f->base; > } > diff --git a/drivers/dma-buf/st-dma-fence.c b/drivers/dma-buf/st-dma-fence.c > index cb62e606d0a2..b3f88e89cc44 100644 > --- a/drivers/dma-buf/st-dma-fence.c > +++ b/drivers/dma-buf/st-dma-fence.c > @@ -31,7 +31,7 @@ static struct dma_fence *mock_fence(void) > if (!f) > return NULL; > > - dma_fence_init(f, &mock_ops, NULL, 0, 0); > + dma_fence_init(f, &mock_ops, NULL, 0, 0, 0); > return f; > } > > diff --git a/drivers/dma-buf/st-dma-resv.c b/drivers/dma-buf/st-dma-resv.c > index 0b96136bbd54..c3a920ab3fcf 100644 > --- a/drivers/dma-buf/st-dma-resv.c > +++ b/drivers/dma-buf/st-dma-resv.c > @@ -35,7 +35,7 @@ static struct dma_fence *alloc_fence(void) > if (!f) > return NULL; > > - dma_fence_init(f, &fence_ops, &fence_lock, 0, 0); > + dma_fence_init(f, &fence_ops, &fence_lock, 0, 0, 0); > return f; > } > > diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c > index 8df20b0218a9..ce43af7e735e 100644 > --- a/drivers/dma-buf/sw_sync.c > +++ b/drivers/dma-buf/sw_sync.c > @@ -258,7 +258,7 @@ static struct sync_pt *sync_pt_create(struct sync_timeline *obj, > > sync_timeline_get(obj); > dma_fence_init(&pt->base, &timeline_fence_ops, &obj->lock, > - obj->context, value); > + obj->context, value, 0); > INIT_LIST_HEAD(&pt->link); > > spin_lock_irq(&obj->lock); > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c > index 9b10d015671c..30ccdb3e0b47 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c > @@ -77,7 +77,7 @@ struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context, > spin_lock_init(&fence->lock); > fence->context_id = context_id; > dma_fence_init(&fence->base, &amdkfd_fence_ops, &fence->lock, > - context, atomic_inc_return(&fence_seq)); > + context, atomic_inc_return(&fence_seq), 0); > > return fence; > } > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > index bff2d38f3571..03e1974f8dda 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c > @@ -112,7 +112,7 @@ void amdgpu_fence_emit(struct amdgpu_ring *ring, struct amdgpu_fence *af, > seq = ++ring->fence_drv.sync_seq; > dma_fence_init(fence, &amdgpu_fence_ops, > &ring->fence_drv.lock, > - adev->fence_context + ring->idx, seq); > + adev->fence_context + ring->idx, seq, 0); > > amdgpu_ring_emit_fence(ring, ring->fence_drv.gpu_addr, > seq, flags | AMDGPU_FENCE_FLAG_INT); > diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c > index 63ead8ba6756..92641bc0a378 100644 > --- a/drivers/gpu/drm/drm_crtc.c > +++ b/drivers/gpu/drm/drm_crtc.c > @@ -190,7 +190,7 @@ struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) > return NULL; > > dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, > - crtc->fence_context, ++crtc->fence_seqno); > + crtc->fence_context, ++crtc->fence_seqno, 0); > > return fence; > } > diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c > index b4a002e6d043..64b06b890f19 100644 > --- a/drivers/gpu/drm/drm_writeback.c > +++ b/drivers/gpu/drm/drm_writeback.c > @@ -592,7 +592,7 @@ drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector) > > dma_fence_init(fence, &drm_writeback_fence_ops, > &wb_connector->fence_lock, wb_connector->fence_context, > - ++wb_connector->fence_seqno); > + ++wb_connector->fence_seqno, 0); > > return fence; > } > diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c > index e75dab5e407d..a10e4e4cf372 100644 > --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c > +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c > @@ -1199,7 +1199,7 @@ static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu) > f->gpu = gpu; > > dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock, > - gpu->fence_context, ++gpu->next_fence); > + gpu->fence_context, ++gpu->next_fence, 0); > > return &f->base; > } > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c > index 56489cc127d6..ffaa70191f27 100644 > --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c > +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c > @@ -437,7 +437,7 @@ i915_ttm_memcpy_work_arm(struct i915_ttm_memcpy_work *work, > int ret; > > spin_lock_init(&work->lock); > - dma_fence_init(&work->fence, &dma_fence_memcpy_ops, &work->lock, 0, 0); > + dma_fence_init(&work->fence, &dma_fence_memcpy_ops, &work->lock, 0, 0, 0); > dma_fence_get(&work->fence); > ret = dma_fence_add_callback(dep, &work->cb, __memcpy_cb); > if (ret) { > diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c > index f66f8efc7062..0f4fc9cc0033 100644 > --- a/drivers/gpu/drm/i915/i915_request.c > +++ b/drivers/gpu/drm/i915/i915_request.c > @@ -953,7 +953,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp) > goto err_free; > > dma_fence_init(&rq->fence, &i915_fence_ops, &rq->lock, > - tl->fence_context, seqno); > + tl->fence_context, seqno, 0); > > RCU_INIT_POINTER(rq->timeline, tl); > rq->hwsp_seqno = tl->hwsp_seqno; > diff --git a/drivers/gpu/drm/i915/i915_sw_fence_work.c b/drivers/gpu/drm/i915/i915_sw_fence_work.c > index 366418108f78..4cd44dd26e35 100644 > --- a/drivers/gpu/drm/i915/i915_sw_fence_work.c > +++ b/drivers/gpu/drm/i915/i915_sw_fence_work.c > @@ -85,7 +85,7 @@ void dma_fence_work_init(struct dma_fence_work *f, > { > f->ops = ops; > spin_lock_init(&f->lock); > - dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0); > + dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0, 0); > i915_sw_fence_init(&f->chain, fence_notify); > INIT_WORK(&f->work, fence_work); > } > diff --git a/drivers/gpu/drm/i915/i915_vma_resource.c b/drivers/gpu/drm/i915/i915_vma_resource.c > index a8f2112ce81f..19596410e32f 100644 > --- a/drivers/gpu/drm/i915/i915_vma_resource.c > +++ b/drivers/gpu/drm/i915/i915_vma_resource.c > @@ -263,7 +263,7 @@ void __i915_vma_resource_init(struct i915_vma_resource *vma_res) > { > spin_lock_init(&vma_res->lock); > dma_fence_init(&vma_res->unbind_fence, &unbind_fence_ops, > - &vma_res->lock, 0, 0); > + &vma_res->lock, 0, 0, 0); > refcount_set(&vma_res->hold_count, 1); > i915_sw_fence_init(&vma_res->chain, i915_vma_resource_fence_notify); > } > diff --git a/drivers/gpu/drm/i915/selftests/i915_sw_fence.c b/drivers/gpu/drm/i915/selftests/i915_sw_fence.c > index ecb2d718f6a6..d8d4f7057031 100644 > --- a/drivers/gpu/drm/i915/selftests/i915_sw_fence.c > +++ b/drivers/gpu/drm/i915/selftests/i915_sw_fence.c > @@ -641,7 +641,7 @@ static struct dma_fence *alloc_dma_fence(void) > > dma = kmalloc_obj(*dma); > if (dma) > - dma_fence_init(dma, &mock_fence_ops, &mock_fence_lock, 0, 0); > + dma_fence_init(dma, &mock_fence_ops, &mock_fence_lock, 0, 0, 0); > > return dma; > } > diff --git a/drivers/gpu/drm/imagination/pvr_ccb.c b/drivers/gpu/drm/imagination/pvr_ccb.c > index e408df74853d..7043b491fe54 100644 > --- a/drivers/gpu/drm/imagination/pvr_ccb.c > +++ b/drivers/gpu/drm/imagination/pvr_ccb.c > @@ -645,7 +645,7 @@ pvr_kccb_reserve_slot(struct pvr_device *pvr_dev, struct dma_fence *f) > dma_fence_init(&fence->base, &pvr_kccb_fence_ops, > &pvr_dev->kccb.fence_ctx.lock, > pvr_dev->kccb.fence_ctx.id, > - atomic_inc_return(&pvr_dev->kccb.fence_ctx.seqno)); > + atomic_inc_return(&pvr_dev->kccb.fence_ctx.seqno), 0); > out_fence = dma_fence_get(&fence->base); > list_add_tail(&fence->node, &pvr_dev->kccb.waiters); > } else { > diff --git a/drivers/gpu/drm/imagination/pvr_queue.c b/drivers/gpu/drm/imagination/pvr_queue.c > index 24a8645aa913..34b826381aa2 100644 > --- a/drivers/gpu/drm/imagination/pvr_queue.c > +++ b/drivers/gpu/drm/imagination/pvr_queue.c > @@ -305,7 +305,7 @@ pvr_queue_fence_init(struct dma_fence *f, > INIT_WORK(&fence->release_work, pvr_queue_fence_release_work); > dma_fence_init(&fence->base, fence_ops, > &fence_ctx->lock, fence_ctx->id, > - atomic_inc_return(&fence_ctx->seqno)); > + atomic_inc_return(&fence_ctx->seqno), 0); > } > > /** > diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c > index 9a1e6b9ecbe5..fee595b9629a 100644 > --- a/drivers/gpu/drm/lima/lima_sched.c > +++ b/drivers/gpu/drm/lima/lima_sched.c > @@ -97,7 +97,7 @@ static struct lima_fence *lima_fence_create(struct lima_sched_pipe *pipe) > > fence->pipe = pipe; > dma_fence_init(&fence->base, &lima_fence_ops, &pipe->fence_lock, > - pipe->fence_context, ++pipe->fence_seqno); > + pipe->fence_context, ++pipe->fence_seqno, 0); > > return fence; > } > diff --git a/drivers/gpu/drm/msm/msm_fence.c b/drivers/gpu/drm/msm/msm_fence.c > index 3dca8e09c192..1ec59919c32e 100644 > --- a/drivers/gpu/drm/msm/msm_fence.c > +++ b/drivers/gpu/drm/msm/msm_fence.c > @@ -197,5 +197,5 @@ msm_fence_init(struct dma_fence *fence, struct msm_fence_context *fctx) > WARN_ON(kref_read(&fence->refcount)); > > dma_fence_init(&f->base, &msm_fence_ops, &fctx->spinlock, > - fctx->context, ++fctx->last_fence); > + fctx->context, ++fctx->last_fence, 0); > } > diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c > index 11e95c37ce50..97e20954c71b 100644 > --- a/drivers/gpu/drm/nouveau/nouveau_fence.c > +++ b/drivers/gpu/drm/nouveau/nouveau_fence.c > @@ -216,10 +216,10 @@ nouveau_fence_emit(struct nouveau_fence *fence) > > if (priv->uevent) > dma_fence_init(&fence->base, &nouveau_fence_ops_uevent, > - &fctx->lock, fctx->context, ++fctx->sequence); > + &fctx->lock, fctx->context, ++fctx->sequence, 0); > else > dma_fence_init(&fence->base, &nouveau_fence_ops_legacy, > - &fctx->lock, fctx->context, ++fctx->sequence); > + &fctx->lock, fctx->context, ++fctx->sequence, 0); > kref_get(&fctx->fence_ref); > > ret = fctx->emit(fence); > diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c > index 4ddf4b722ddf..de242d275978 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_job.c > +++ b/drivers/gpu/drm/panfrost/panfrost_job.c > @@ -105,7 +105,7 @@ static struct dma_fence *panfrost_fence_create(struct panfrost_device *pfdev, in > fence->queue = js_num; > fence->seqno = ++js->queue[js_num].emit_seqno; > dma_fence_init(&fence->base, &panfrost_fence_ops, &js->job_lock, > - js->queue[js_num].fence_context, fence->seqno); > + js->queue[js_num].fence_context, fence->seqno, 0); > > return &fence->base; > } > diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c > index a343c5180e01..c46f69ade7a0 100644 > --- a/drivers/gpu/drm/panthor/panthor_sched.c > +++ b/drivers/gpu/drm/panthor/panthor_sched.c > @@ -3322,7 +3322,7 @@ queue_run_job(struct drm_sched_job *sched_job) > &panthor_queue_fence_ops, > &queue->fence_ctx.lock, > queue->fence_ctx.id, > - atomic64_inc_return(&queue->fence_ctx.seqno)); > + atomic64_inc_return(&queue->fence_ctx.seqno), 0); > > job->profiling.slot = queue->profiling.seqno++; > if (queue->profiling.seqno == queue->profiling.slot_count) > diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c > index 06979d0e8a9f..2608d82f7370 100644 > --- a/drivers/gpu/drm/qxl/qxl_release.c > +++ b/drivers/gpu/drm/qxl/qxl_release.c > @@ -430,7 +430,7 @@ void qxl_release_fence_buffer_objects(struct qxl_release *release) > * set the highest bits. This will break if we really allow exporting of dma-bufs. > */ > dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, > - release->id | 0xf0000000, release->base.seqno); > + release->id | 0xf0000000, release->base.seqno, 0); > trace_dma_fence_emit(&release->base); > > list_for_each_entry(entry, &release->bos, list) { > diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c > index 8e9402b8811b..1360b5215f5e 100644 > --- a/drivers/gpu/drm/radeon/radeon_fence.c > +++ b/drivers/gpu/drm/radeon/radeon_fence.c > @@ -148,7 +148,7 @@ int radeon_fence_emit(struct radeon_device *rdev, > dma_fence_init(&(*fence)->base, &radeon_fence_ops, > &rdev->fence_queue.lock, > rdev->fence_context + ring, > - seq); > + seq, 0); > radeon_fence_ring_emit(rdev, ring, *fence); > trace_radeon_fence_emit(rdev_to_drm(rdev), ring, (*fence)->seq); > radeon_fence_schedule_check(rdev, ring); > diff --git a/drivers/gpu/drm/scheduler/sched_fence.c b/drivers/gpu/drm/scheduler/sched_fence.c > index b7a4cb921234..94ba0cf4fe02 100644 > --- a/drivers/gpu/drm/scheduler/sched_fence.c > +++ b/drivers/gpu/drm/scheduler/sched_fence.c > @@ -229,9 +229,9 @@ void drm_sched_fence_init(struct drm_sched_fence *fence, > fence->sched = entity->rq->sched; > seq = atomic_inc_return(&entity->fence_seq); > dma_fence_init(&fence->scheduled, &drm_sched_fence_ops_scheduled, > - &fence->lock, entity->fence_context, seq); > + &fence->lock, entity->fence_context, seq, 0); > dma_fence_init(&fence->finished, &drm_sched_fence_ops_finished, > - &fence->lock, entity->fence_context + 1, seq); > + &fence->lock, entity->fence_context + 1, seq, 0); > } > > module_init(drm_sched_fence_slab_init); > diff --git a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c > index 2dfa3efef210..169792a4b329 100644 > --- a/drivers/gpu/drm/scheduler/tests/mock_scheduler.c > +++ b/drivers/gpu/drm/scheduler/tests/mock_scheduler.c > @@ -173,7 +173,7 @@ static struct dma_fence *mock_sched_run_job(struct drm_sched_job *sched_job) > &drm_mock_sched_hw_fence_ops, > &sched->lock, > sched->hw_timeline.context, > - atomic_inc_return(&sched->hw_timeline.next_seqno)); > + atomic_inc_return(&sched->hw_timeline.next_seqno), 0); > > dma_fence_get(&job->hw_fence); /* Reference for the job_list */ > > diff --git a/drivers/gpu/drm/ttm/tests/ttm_bo_test.c b/drivers/gpu/drm/ttm/tests/ttm_bo_test.c > index f3103307b5df..633cc7458505 100644 > --- a/drivers/gpu/drm/ttm/tests/ttm_bo_test.c > +++ b/drivers/gpu/drm/ttm/tests/ttm_bo_test.c > @@ -450,7 +450,7 @@ static void ttm_bo_fini_shared_resv(struct kunit *test) > KUNIT_ASSERT_NOT_NULL(test, fence); > > spin_lock_init(&fence_lock); > - dma_fence_init(fence, &mock_fence_ops, &fence_lock, 0, 0); > + dma_fence_init(fence, &mock_fence_ops, &fence_lock, 0, 0, 0); > > dma_resv_lock(external_resv, NULL); > dma_resv_reserve_fences(external_resv, 1); > diff --git a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c > index 56ad8ef32584..e22a1335f166 100644 > --- a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c > +++ b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c > @@ -57,7 +57,7 @@ static struct dma_fence *alloc_mock_fence(struct kunit *test) > fence = kunit_kzalloc(test, sizeof(*fence), GFP_KERNEL); > KUNIT_ASSERT_NOT_NULL(test, fence); > > - dma_fence_init(fence, &fence_ops, &fence_lock, 0, 0); > + dma_fence_init(fence, &fence_ops, &fence_lock, 0, 0, 0); > > return fence; > } > diff --git a/drivers/gpu/drm/v3d/v3d_fence.c b/drivers/gpu/drm/v3d/v3d_fence.c > index c500136d0455..1fdba5a21580 100644 > --- a/drivers/gpu/drm/v3d/v3d_fence.c > +++ b/drivers/gpu/drm/v3d/v3d_fence.c > @@ -16,7 +16,7 @@ struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue q) > fence->queue = q; > fence->seqno = ++queue->emit_seqno; > dma_fence_init(&fence->base, &v3d_fence_ops, &queue->queue_lock, > - queue->fence_context, fence->seqno); > + queue->fence_context, fence->seqno, 0); > > return &fence->base; > } > diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c > index ff611c618d6b..420988d516c1 100644 > --- a/drivers/gpu/drm/vc4/vc4_gem.c > +++ b/drivers/gpu/drm/vc4/vc4_gem.c > @@ -648,7 +648,7 @@ vc4_queue_submit(struct drm_device *dev, struct vc4_exec_info *exec, > exec->seqno = seqno; > > dma_fence_init(&fence->base, &vc4_fence_ops, &vc4->job_lock, > - vc4->dma_fence_context, exec->seqno); > + vc4->dma_fence_context, exec->seqno, 0); > fence->seqno = exec->seqno; > exec->fence = &fence->base; > > diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c > index 0e53ba7db629..18700e5f9167 100644 > --- a/drivers/gpu/drm/vgem/vgem_fence.c > +++ b/drivers/gpu/drm/vgem/vgem_fence.c > @@ -77,7 +77,7 @@ static struct dma_fence *vgem_fence_create(struct vgem_file *vfile, > > spin_lock_init(&fence->lock); > dma_fence_init(&fence->base, &vgem_fence_ops, &fence->lock, > - dma_fence_context_alloc(1), 1); > + dma_fence_context_alloc(1), 1, 0); > > timer_setup(&fence->timer, vgem_fence_timeout, TIMER_IRQSAFE); > > diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c b/drivers/gpu/drm/virtio/virtgpu_fence.c > index c3e66ef2133a..8e469391d2e4 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_fence.c > +++ b/drivers/gpu/drm/virtio/virtgpu_fence.c > @@ -76,7 +76,7 @@ struct virtio_gpu_fence *virtio_gpu_fence_alloc(struct virtio_gpu_device *vgdev, > */ > > dma_fence_init(&fence->f, &virtio_gpu_fence_ops, &drv->lock, > - fence_context, 0); > + fence_context, 0, 0); > > return fence; > } > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c > index 384c6736cf6b..15f355dc6881 100644 > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c > @@ -163,7 +163,7 @@ static int vmw_fence_obj_init(struct vmw_fence_manager *fman, > int ret = 0; > > dma_fence_init(&fence->base, &vmw_fence_ops, &fman->lock, > - fman->ctx, seqno); > + fman->ctx, seqno, 0); > fence->destroy = destroy; > > spin_lock(&fman->lock); > diff --git a/drivers/gpu/drm/xe/xe_hw_fence.c b/drivers/gpu/drm/xe/xe_hw_fence.c > index 14720623ad00..30bfc42972e0 100644 > --- a/drivers/gpu/drm/xe/xe_hw_fence.c > +++ b/drivers/gpu/drm/xe/xe_hw_fence.c > @@ -243,7 +243,7 @@ void xe_hw_fence_init(struct dma_fence *fence, struct xe_hw_fence_ctx *ctx, > INIT_LIST_HEAD(&hw_fence->irq_link); > > dma_fence_init(fence, &xe_hw_fence_ops, &ctx->irq->lock, > - ctx->dma_fence_ctx, ctx->next_seqno++); > + ctx->dma_fence_ctx, ctx->next_seqno++, 0); > > trace_xe_hw_fence_create(hw_fence); > } > diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c > index c9320feeafba..912840eeec50 100644 > --- a/drivers/gpu/drm/xe/xe_oa.c > +++ b/drivers/gpu/drm/xe/xe_oa.c > @@ -1053,7 +1053,7 @@ static int xe_oa_emit_oa_config(struct xe_oa_stream *stream, struct xe_oa_config > > /* Point of no return: initialize and set fence to signal */ > spin_lock_init(&ofence->lock); > - dma_fence_init(&ofence->base, &xe_oa_fence_ops, &ofence->lock, 0, 0); > + dma_fence_init(&ofence->base, &xe_oa_fence_ops, &ofence->lock, 0, 0, 0); > > for (i = 0; i < stream->num_syncs; i++) { > if (stream->syncs[i].flags & DRM_XE_SYNC_FLAG_SIGNAL) > diff --git a/drivers/gpu/drm/xe/xe_preempt_fence.c b/drivers/gpu/drm/xe/xe_preempt_fence.c > index 4aa570fe745d..343f1ba1e1cd 100644 > --- a/drivers/gpu/drm/xe/xe_preempt_fence.c > +++ b/drivers/gpu/drm/xe/xe_preempt_fence.c > @@ -154,7 +154,7 @@ xe_preempt_fence_arm(struct xe_preempt_fence *pfence, struct xe_exec_queue *q, > pfence->q = xe_exec_queue_get(q); > spin_lock_init(&pfence->lock); > dma_fence_init(&pfence->base, &preempt_fence_ops, > - &pfence->lock, context, seqno); > + &pfence->lock, context, seqno, 0); > > return &pfence->base; > } > diff --git a/drivers/gpu/drm/xe/xe_tlb_inval.c b/drivers/gpu/drm/xe/xe_tlb_inval.c > index c9cc5842d65b..1fd39434dc0e 100644 > --- a/drivers/gpu/drm/xe/xe_tlb_inval.c > +++ b/drivers/gpu/drm/xe/xe_tlb_inval.c > @@ -544,7 +544,7 @@ void xe_tlb_inval_fence_init(struct xe_tlb_inval *tlb_inval, > > spin_lock_irq(&tlb_inval->lock); > dma_fence_init(&fence->base, &inval_fence_ops, &tlb_inval->lock, > - dma_fence_context_alloc(1), 1); > + dma_fence_context_alloc(1), 1, 0); > spin_unlock_irq(&tlb_inval->lock); > INIT_LIST_HEAD(&fence->link); > if (stack) > diff --git a/drivers/gpu/host1x/fence.c b/drivers/gpu/host1x/fence.c > index 1acf579c562b..7e074e72a055 100644 > --- a/drivers/gpu/host1x/fence.c > +++ b/drivers/gpu/host1x/fence.c > @@ -136,7 +136,7 @@ struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold, > fence->timeout = timeout; > > dma_fence_init(&fence->base, &host1x_syncpt_fence_ops, &sp->fences.lock, > - dma_fence_context_alloc(1), 0); > + dma_fence_context_alloc(1), 0, 0); > > INIT_DELAYED_WORK(&fence->timeout_work, do_fence_timeout); > > diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c > index 4294101810fd..f7d6b294b63c 100644 > --- a/drivers/iio/industrialio-buffer.c > +++ b/drivers/iio/industrialio-buffer.c > @@ -1904,7 +1904,7 @@ static int iio_buffer_enqueue_dmabuf(struct iio_dev_buffer_pair *ib, > * the dma_fence. > */ > dma_fence_init(&fence->base, &iio_buffer_dma_fence_ops, > - &fence->lock, priv->context, seqno); > + &fence->lock, priv->context, seqno, 0); > > ret = iio_dma_resv_lock(dmabuf, nonblock); > if (ret) > diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c > index c64a268e98a4..eb367a1666c2 100644 > --- a/drivers/usb/gadget/function/f_fs.c > +++ b/drivers/usb/gadget/function/f_fs.c > @@ -1733,7 +1733,7 @@ static int ffs_dmabuf_transfer(struct file *file, > seqno = atomic_add_return(1, &epfile->seqno); > > dma_fence_init(&fence->base, &ffs_dmabuf_fence_ops, > - &priv->lock, priv->context, seqno); > + &priv->lock, priv->context, seqno, 0); > > resv_dir = epfile->in ? DMA_RESV_USAGE_READ : DMA_RESV_USAGE_WRITE; > > diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h > index dd07d128adc3..6f5c245d89ec 100644 > --- a/include/linux/dma-fence.h > +++ b/include/linux/dma-fence.h > @@ -103,6 +103,12 @@ struct dma_fence { > int error; > }; > > +/** enum dma_fence_flag_bits - internal dma_fence flags > + * > + * These flags are all only for internal usage, except for > + * @DMA_FENCE_FLAG_SEQNO64_BIT and the user bits beginning at > + * @DMA_FENCE_FLAG_USER_BITS. > + */ > enum dma_fence_flag_bits { > DMA_FENCE_FLAG_INITIALIZED_BIT, > DMA_FENCE_FLAG_INLINE_LOCK_BIT, > @@ -110,6 +116,7 @@ enum dma_fence_flag_bits { > DMA_FENCE_FLAG_SIGNALED_BIT, > DMA_FENCE_FLAG_TIMESTAMP_BIT, > DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, > + > DMA_FENCE_FLAG_USER_BITS, /* must always be last member */ > }; > > @@ -279,11 +286,10 @@ struct dma_fence_ops { > }; > > void dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, > - spinlock_t *lock, u64 context, u64 seqno); > - > + spinlock_t *lock, u64 context, u64 seqno, > + unsigned long flags); > void dma_fence_init64(struct dma_fence *fence, const struct dma_fence_ops *ops, > spinlock_t *lock, u64 context, u64 seqno); > - > void dma_fence_release(struct kref *kref); > void dma_fence_free(struct dma_fence *fence); > void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq); > diff --git a/rust/kernel/dma_buf/dma_fence.rs b/rust/kernel/dma_buf/dma_fence.rs > index 18a43e1bb442..ee8fa4ecd6c1 100644 > --- a/rust/kernel/dma_buf/dma_fence.rs > +++ b/rust/kernel/dma_buf/dma_fence.rs > @@ -736,7 +736,7 @@ pub fn new_fence(self) -> DriverFence<'a, T> { > // SAFETY: `fence_ptr` has been created directly above. It will live > // at least as long as `Self`. The same applies to `&Self::OPS`. > unsafe { > - bindings::dma_fence_init(fence_ptr, self.ops, null_ptr, self.data.fctx.nr, seqno) > + bindings::dma_fence_init(fence_ptr, self.ops, null_ptr, self.data.fctx.nr, seqno, 0) > }; > > self.data.fctx.nr_of_unsignaled_fences.fetch_add(1, Relaxed);