Replace idr with xarray as we actually need hash functionality. Cleanup code related to vm pasid by adding helper function.
Signed-off-by: Nirmoy Das <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 134 +++++++++++-------------- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 +- 2 files changed, 60 insertions(+), 77 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index be841d62a1d4..e047e56a4be2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -87,6 +87,39 @@ struct amdgpu_prt_cb { struct dma_fence_cb cb; }; +static int amdgpu_vm_set_pasid(struct amdgpu_device *adev, + struct amdgpu_vm *vm, + unsigned long pasid) +{ + unsigned long flags; + int r; + + if (pasid) { + xa_lock_irqsave(&adev->vm_manager.pasids, flags); + r = xa_err(__xa_store(&adev->vm_manager.pasids, pasid, vm, + GFP_ATOMIC)); + xa_unlock_irqrestore(&adev->vm_manager.pasids, flags); + if (r < 0) + return r; + } else { + unsigned long index; + struct amdgpu_vm *res; + + xa_lock_irqsave(&adev->vm_manager.pasids, flags); + xa_for_each(&adev->vm_manager.pasids, index, res) { + if (res == vm) { + __xa_erase(&adev->vm_manager.pasids, index); + break; + } + } + xa_unlock_irqrestore(&adev->vm_manager.pasids, flags); + } + + vm->pasid = pasid; + + return 0; +} + /* * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS * happens while holding this lock anywhere to prevent deadlocks when @@ -2940,18 +2973,9 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid) amdgpu_bo_unreserve(vm->root.bo); - if (pasid) { - unsigned long flags; - - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1, - GFP_ATOMIC); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - if (r < 0) - goto error_free_root; - - vm->pasid = pasid; - } + r = amdgpu_vm_set_pasid(adev, vm, pasid); + if (r) + goto error_free_root; INIT_KFIFO(vm->faults); @@ -3039,18 +3063,11 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, if (r) goto unreserve_bo; - if (pasid) { - unsigned long flags; - - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1, - GFP_ATOMIC); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - - if (r == -ENOSPC) - goto unreserve_bo; - r = 0; - } + /* remove previous {pasid:vm} entry first */ + r = amdgpu_vm_set_pasid(adev, vm, 0); + r = amdgpu_vm_set_pasid(adev, vm, pasid); + if (r) + goto unreserve_bo; /* Check if PD needs to be reinitialized and do it before * changing any other state, in case it fails. @@ -3061,7 +3078,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, to_amdgpu_bo_vm(vm->root.bo), false); if (r) - goto free_idr; + goto free_pasid_entry; } /* Update VM state */ @@ -3078,7 +3095,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, r = amdgpu_bo_sync_wait(vm->root.bo, AMDGPU_FENCE_OWNER_UNDEFINED, true); if (r) - goto free_idr; + goto free_pasid_entry; vm->update_funcs = &amdgpu_vm_cpu_funcs; } else { @@ -3088,31 +3105,14 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, vm->last_update = NULL; vm->is_compute_context = true; - if (vm->pasid) { - unsigned long flags; - - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - vm->pasid = 0; - } - /* Free the shadow bo for compute VM */ amdgpu_bo_unref(&to_amdgpu_bo_vm(vm->root.bo)->shadow); - if (pasid) - vm->pasid = pasid; - goto unreserve_bo; -free_idr: - if (pasid) { - unsigned long flags; +free_pasid_entry: + amdgpu_vm_set_pasid(adev, vm, 0); - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - idr_remove(&adev->vm_manager.pasid_idr, pasid); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - } unreserve_bo: amdgpu_bo_unreserve(vm->root.bo); return r; @@ -3128,14 +3128,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, */ void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm) { - if (vm->pasid) { - unsigned long flags; - - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - } - vm->pasid = 0; + amdgpu_vm_set_pasid(adev, vm, 0); vm->is_compute_context = false; } @@ -3159,15 +3152,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm) root = amdgpu_bo_ref(vm->root.bo); amdgpu_bo_reserve(root, true); - if (vm->pasid) { - unsigned long flags; - - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); - idr_remove(&adev->vm_manager.pasid_idr, vm->pasid); - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); - vm->pasid = 0; - } - + amdgpu_vm_set_pasid(adev, vm, 0); dma_fence_wait(vm->last_unlocked, false); dma_fence_put(vm->last_unlocked); @@ -3249,8 +3234,7 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) adev->vm_manager.vm_update_mode = 0; #endif - idr_init(&adev->vm_manager.pasid_idr); - spin_lock_init(&adev->vm_manager.pasid_lock); + xa_init_flags(&adev->vm_manager.pasids, XA_FLAGS_LOCK_IRQ); } /** @@ -3262,8 +3246,8 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) */ void amdgpu_vm_manager_fini(struct amdgpu_device *adev) { - WARN_ON(!idr_is_empty(&adev->vm_manager.pasid_idr)); - idr_destroy(&adev->vm_manager.pasid_idr); + WARN_ON(!xa_empty(&adev->vm_manager.pasids)); + xa_destroy(&adev->vm_manager.pasids); amdgpu_vmid_mgr_fini(adev); } @@ -3332,13 +3316,13 @@ void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid, struct amdgpu_vm *vm; unsigned long flags; - spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags); + xa_lock_irqsave(&adev->vm_manager.pasids, flags); - vm = idr_find(&adev->vm_manager.pasid_idr, pasid); + vm = xa_load(&adev->vm_manager.pasids, pasid); if (vm) *task_info = vm->task_info; - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags); + xa_unlock_irqrestore(&adev->vm_manager.pasids, flags); } /** @@ -3380,15 +3364,15 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid, struct amdgpu_vm *vm; int r; - spin_lock_irqsave(&adev->vm_manager.pasid_lock, irqflags); - vm = idr_find(&adev->vm_manager.pasid_idr, pasid); + xa_lock_irqsave(&adev->vm_manager.pasids, irqflags); + vm = xa_load(&adev->vm_manager.pasids, pasid); if (vm) { root = amdgpu_bo_ref(vm->root.bo); is_compute_context = vm->is_compute_context; } else { root = NULL; } - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, irqflags); + xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags); if (!root) return false; @@ -3406,11 +3390,11 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid, goto error_unref; /* Double check that the VM still exists */ - spin_lock_irqsave(&adev->vm_manager.pasid_lock, irqflags); - vm = idr_find(&adev->vm_manager.pasid_idr, pasid); + xa_lock_irqsave(&adev->vm_manager.pasids, irqflags); + vm = xa_load(&adev->vm_manager.pasids, pasid); if (vm && vm->root.bo != root) vm = NULL; - spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, irqflags); + xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags); if (!vm) goto error_unlock; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index ddb85a85cbba..31c467764162 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -359,8 +359,7 @@ struct amdgpu_vm_manager { /* PASID to VM mapping, will be used in interrupt context to * look up VM of a page fault */ - struct idr pasid_idr; - spinlock_t pasid_lock; + struct xarray pasids; }; struct amdgpu_bo_va_mapping; -- 2.32.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
