Instead of trying to figure out if a TLB flush is necessary or not use
the information provided by the VM subsystem now.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 +
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index f36062be9ca8..945982a5d688 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -705,6 +705,7 @@ struct kfd_process_device {
/* VM context for GPUVM allocations */
struct file *drm_file;
void *drm_priv;
+ uint64_t tlb_seq;
/* GPUVM allocations storage */
struct idr alloc_idr;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 59c04b2d383b..4a8a047b7593 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1560,6 +1560,7 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
return ret;
}
pdd->drm_priv = drm_file->private_data;
+ pdd->tlb_seq = 0;
ret = kfd_process_device_reserve_ib_mem(pdd);
if (ret)
@@ -1949,8 +1950,14 @@ int kfd_reserved_mem_mmap(struct kfd_dev *dev, struct kfd_process *process,
void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type)
{
+ struct amdgpu_vm *vm = drm_priv_to_vm(pdd->drm_priv);
+ uint64_t tlb_seq = amdgpu_vm_tlb_seq(vm);
struct kfd_dev *dev = pdd->dev;
+ if (pdd->tlb_seq == tlb_seq)
+ return;
+
+ pdd->tlb_seq = tlb_seq;
if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
/* Nothing to flush until a VMID is assigned, which
* only happens when the first queue is created.
--
2.25.1
