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Then, continue with ops_parse to create new VMAs by REMAP > unmapping of old one. > > v2 (Matthew Brost) > - Use vops flag to call unmapping of ranges in vm_bind_ioctl_ops_parse > - Rename the function > > Signed-off-by: Himal Prasad Ghimiray > --- > drivers/gpu/drm/xe/xe_svm.c | 27 +++++++++++++++++++++++++++ > drivers/gpu/drm/xe/xe_svm.h | 8 ++++++++ > drivers/gpu/drm/xe/xe_vm.c | 8 ++++++-- > 3 files changed, 41 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c > index 19420635f1fa..df6992ee2e2d 100644 > --- a/drivers/gpu/drm/xe/xe_svm.c > +++ b/drivers/gpu/drm/xe/xe_svm.c > @@ -935,6 +935,33 @@ bool xe_svm_has_mapping(struct xe_vm *vm, u64 start, u64 end) > return drm_gpusvm_has_mapping(&vm->svm.gpusvm, start, end); > } > > +/** > + * xe_svm_unmap_address_range - UNMAP SVM mappings and ranges > + * @start: start addr > + * @end: end addr > + * > + * This function UNMAPS svm ranges if start or end address are inside them. > + */ > +void xe_svm_unmap_address_range(struct xe_vm *vm, u64 start, u64 end) > +{ > + struct drm_gpusvm_notifier *notifier, *next; > + > + lockdep_assert_held_write(&vm->lock); > + > + drm_gpusvm_for_each_notifier_safe(notifier, next, &vm->svm.gpusvm, start, end) { > + struct drm_gpusvm_range *range, *__next; > + > + drm_gpusvm_for_each_range_safe(range, __next, notifier, start, end) { > + if (start > drm_gpusvm_range_start(range) || > + end < drm_gpusvm_range_end(range)) { > + if (IS_DGFX(vm->xe) && xe_svm_range_in_vram(to_xe_range(range))) > + drm_gpusvm_range_evict(&vm->svm.gpusvm, range); I think you could use xe_svm_range_migrate_to_smem here but also I don't eviction is strickly required here either. This akin to a partial unmap and we don't evict there. Any reason that I'm missing here? Matt > + __xe_svm_garbage_collector(vm, to_xe_range(range)); > + } > + } > + } > +} > + > /** > * xe_svm_bo_evict() - SVM evict BO to system memory > * @bo: BO to evict > diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h > index af8f285b6caa..4e5d42323679 100644 > --- a/drivers/gpu/drm/xe/xe_svm.h > +++ b/drivers/gpu/drm/xe/xe_svm.h > @@ -92,6 +92,9 @@ bool xe_svm_range_validate(struct xe_vm *vm, > u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 addr, u64 end, struct xe_vma *vma); > > u8 xe_svm_ranges_zap_ptes_in_range(struct xe_vm *vm, u64 start, u64 end); > + > +void xe_svm_unmap_address_range(struct xe_vm *vm, u64 start, u64 end); > + > /** > * xe_svm_range_has_dma_mapping() - SVM range has DMA mapping > * @range: SVM range > @@ -312,6 +315,11 @@ u8 xe_svm_ranges_zap_ptes_in_range(struct xe_vm *vm, u64 start, u64 end) > return 0; > } > > +static inline > +void xe_svm_unmap_address_range(struct xe_vm *vm, u64 start, u64 end) > +{ > +} > + > #define xe_svm_assert_in_notifier(...) do {} while (0) > #define xe_svm_range_has_dma_mapping(...) false > > diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c > index e059d9810d26..0872df8d0b15 100644 > --- a/drivers/gpu/drm/xe/xe_vm.c > +++ b/drivers/gpu/drm/xe/xe_vm.c > @@ -2663,8 +2663,12 @@ static int vm_bind_ioctl_ops_parse(struct xe_vm *vm, struct drm_gpuva_ops *ops, > end = op->base.remap.next->va.addr; > > if (xe_vma_is_cpu_addr_mirror(old) && > - xe_svm_has_mapping(vm, start, end)) > - return -EBUSY; > + xe_svm_has_mapping(vm, start, end)) { > + if (vops->flags & XE_VMA_OPS_FLAG_MADVISE) > + xe_svm_unmap_address_range(vm, start, end); > + else > + return -EBUSY; > + } > > op->remap.start = xe_vma_start(old); > op->remap.range = xe_vma_size(old); > -- > 2.34.1 >