github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 08:33:17 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/amdkfd: Use atomic64_t type for pdd->tlb_seq

Browse Source 
To support multi-thread update page table.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang 2022-03-25 20:17:28 -04:00 committed by Alex Deucher
parent 4499c90e90
commit 8fde0248a3
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
View File

@ -705,7 +705,7 @@ struct kfd_process_device {
/* VM context for GPUVM allocations */
struct file *drm_file;
void *drm_priv;
uint64_t tlb_seq;
atomic64_t tlb_seq;
/* GPUVM allocations storage */
struct idr alloc_idr;

10
drivers/gpu/drm/amd/amdkfd/kfd_process.c
View File

@ -1560,7 +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;
atomic64_set(&pdd->tlb_seq, 0);
ret = kfd_process_device_reserve_ib_mem(pdd);
if (ret)
@ -1954,10 +1954,14 @@ void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type)
uint64_t tlb_seq = amdgpu_vm_tlb_seq(vm);
struct kfd_dev *dev = pdd->dev;
if (pdd->tlb_seq == tlb_seq)
/*
* It can be that we race and lose here, but that is extremely unlikely
* and the worst thing which could happen is that we flush the changes
* into the TLB once more which is harmless.
*/
if (atomic64_xchg(&pdd->tlb_seq, 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.