On Tue, Nov 19, 2024 at 03:26:32PM +0100, Thomas Hellström wrote:
> On Tue, 2024-10-15 at 20:25 -0700, Matthew Brost wrote:
> > Add (re)bind to SVM page fault handler. To facilitate add support
> > function to VM layer which (re)binds a SVM range. Also teach PT layer
> > to
> > understand (re)binds of SVM ranges.
> >
> > v2:
> > - Don't assert BO lock held for range binds
> > - Use xe_svm_notifier_lock/unlock helper in xe_svm_close
> > - Use drm_pagemap dma cursor
> > - Take notifier lock in bind code to check range state
> >
> > Signed-off-by: Thomas Hellström <thomas.hellst...@linux.intel.com>
> > Signed-off-by: Matthew Brost <matthew.br...@intel.com>
> > ---
> > drivers/gpu/drm/xe/xe_pt.c | 170 +++++++++++++++++++++++++++--
> > --
> > drivers/gpu/drm/xe/xe_pt_types.h | 2 +
> > drivers/gpu/drm/xe/xe_svm.c | 49 ++++++++-
> > drivers/gpu/drm/xe/xe_svm.h | 17 ++++
> > drivers/gpu/drm/xe/xe_vm.c | 80 +++++++++++++++
> > drivers/gpu/drm/xe/xe_vm.h | 5 +
> > drivers/gpu/drm/xe/xe_vm_types.h | 19 ++++
> > 7 files changed, 319 insertions(+), 23 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c
> > index 282476c4edbd..024e4eb83408 100644
> > --- a/drivers/gpu/drm/xe/xe_pt.c
> > +++ b/drivers/gpu/drm/xe/xe_pt.c
> > @@ -587,6 +587,7 @@ static const struct xe_pt_walk_ops
> > xe_pt_stage_bind_ops = {
> > * range.
> > * @tile: The tile we're building for.
> > * @vma: The vma indicating the address range.
> > + * @range: The range indicating the address range.
> > * @entries: Storage for the update entries used for connecting the
> > tree to
> > * the main tree at commit time.
> > * @num_entries: On output contains the number of @entries used.
> > @@ -602,6 +603,7 @@ static const struct xe_pt_walk_ops
> > xe_pt_stage_bind_ops = {
> > */
> > static int
> > xe_pt_stage_bind(struct xe_tile *tile, struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > struct xe_vm_pgtable_update *entries, u32
> > *num_entries)
>
> Really the same comment here, should rework the interface to drop vma
> and range, although since it's more involved here let's do it as a
> follow-up.
>
Yep agree. We have Jira open for this but is larger rework, mainly
moving the tile_present / tile_invalidated from the VMA's / Range's to
the PT state.
> > {
> > struct xe_device *xe = tile_to_xe(tile);
> > @@ -618,14 +620,38 @@ xe_pt_stage_bind(struct xe_tile *tile, struct
> > xe_vma *vma,
> > .vm = xe_vma_vm(vma),
> > .tile = tile,
> > .curs = &curs,
> > - .va_curs_start = xe_vma_start(vma),
> > + .va_curs_start = range ? range->base.va.start :
> > + xe_vma_start(vma),
> > .vma = vma,
> > .wupd.entries = entries,
> > - .needs_64K = (xe_vma_vm(vma)->flags &
> > XE_VM_FLAG_64K) && is_devmem,
> > };
> > struct xe_pt *pt = xe_vma_vm(vma)->pt_root[tile->id];
> > int ret;
> >
> > + if (range) {
> > + /* Move this entire thing to xe_svm.c? */
> > + xe_svm_notifier_lock(xe_vma_vm(vma));
> > + if (!xe_svm_range_pages_valid(range)) {
> > + xe_svm_notifier_unlock(xe_vma_vm(vma));
> > + return -EAGAIN;
> > + }
> > + if (xe_svm_range_has_dma_mapping(range)) {
> > + xe_res_first_dma(range->base.dma_addr, 0,
> > + range->base.va.end - range-
> > >base.va.start,
> > + &curs);
> > + is_devmem = xe_res_is_vram(&curs);
> > + } else {
> > + xe_assert(xe, false);
> > + }
> > + /*
> > + * Note, when unlocking the resource cursor dma
> > addresses may become
> > + * stale, but the bind will be aborted anyway att
> > commit time.
> > + */
> > + xe_svm_notifier_unlock(xe_vma_vm(vma));
> > + }
> > +
> > + xe_walk.needs_64K = (xe_vma_vm(vma)->flags & XE_VM_FLAG_64K)
> > && is_devmem;
> > +
> > /**
> > * Default atomic expectations for different allocation
> > scenarios are as follows:
> > *
> > @@ -647,7 +673,7 @@ xe_pt_stage_bind(struct xe_tile *tile, struct
> > xe_vma *vma,
> > * gets migrated to LMEM, bind such
> > allocations with
> > * device atomics enabled.
> > */
> > - else if (is_devmem &&
> > !xe_bo_has_single_placement(bo))
> > + else if (is_devmem)
> > xe_walk.default_pte |=
> > XE_USM_PPGTT_PTE_AE;
> > } else {
> > xe_walk.default_pte |= XE_USM_PPGTT_PTE_AE;
> > @@ -663,15 +689,16 @@ xe_pt_stage_bind(struct xe_tile *tile, struct
> > xe_vma *vma,
> >
> > if (is_devmem) {
> > xe_walk.default_pte |= XE_PPGTT_PTE_DM;
> > - xe_walk.dma_offset = vram_region_gpu_offset(bo-
> > >ttm.resource);
> > + xe_walk.dma_offset = bo ? vram_region_gpu_offset(bo-
> > >ttm.resource) : 0;
> > }
> >
> > if (!xe_vma_has_no_bo(vma) && xe_bo_is_stolen(bo))
> > xe_walk.dma_offset =
> > xe_ttm_stolen_gpu_offset(xe_bo_device(bo));
> >
> > - xe_bo_assert_held(bo);
> > + if (!range)
> > + xe_bo_assert_held(bo);
> >
> > - if (!xe_vma_is_null(vma)) {
> > + if (!xe_vma_is_null(vma) && !range) {
> > if (xe_vma_is_userptr(vma))
> > xe_res_first_sg(to_userptr_vma(vma)-
> > >userptr.sg, 0,
> > xe_vma_size(vma), &curs);
> > @@ -681,12 +708,14 @@ xe_pt_stage_bind(struct xe_tile *tile, struct
> > xe_vma *vma,
> > else
> > xe_res_first_sg(xe_bo_sg(bo),
> > xe_vma_bo_offset(vma),
> > xe_vma_size(vma), &curs);
> > - } else {
> > + } else if (!range) {
> > curs.size = xe_vma_size(vma);
> > }
> >
> > - ret = xe_pt_walk_range(&pt->base, pt->level,
> > xe_vma_start(vma),
> > - xe_vma_end(vma), &xe_walk.base);
> > + ret = xe_pt_walk_range(&pt->base, pt->level,
> > + range ? range->base.va.start :
> > xe_vma_start(vma),
> > + range ? range->base.va.end :
> > xe_vma_end(vma),
> > + &xe_walk.base);
> >
> > *num_entries = xe_walk.wupd.num_used_entries;
> > return ret;
> > @@ -902,7 +931,7 @@ static void xe_pt_commit_locks_assert(struct
> > xe_vma *vma)
> >
> > lockdep_assert_held(&vm->lock);
> >
> > - if (!xe_vma_is_userptr(vma) && !xe_vma_is_null(vma))
> > + if (!xe_vma_has_no_bo(vma))
> > dma_resv_assert_held(xe_vma_bo(vma)->ttm.base.resv);
> >
> > xe_vm_assert_held(vm);
> > @@ -1004,12 +1033,13 @@ static void xe_pt_free_bind(struct
> > xe_vm_pgtable_update *entries,
> >
> > static int
> > xe_pt_prepare_bind(struct xe_tile *tile, struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > struct xe_vm_pgtable_update *entries, u32
> > *num_entries)
> > {
> > int err;
> >
> > *num_entries = 0;
> > - err = xe_pt_stage_bind(tile, vma, entries, num_entries);
> > + err = xe_pt_stage_bind(tile, vma, range, entries,
> > num_entries);
> > if (!err)
> > xe_tile_assert(tile, *num_entries);
> >
> > @@ -1115,6 +1145,8 @@ static int op_add_deps(struct xe_vm *vm, struct
> > xe_vma_op *op,
> > case DRM_GPUVA_OP_PREFETCH:
> > err = vma_add_deps(gpuva_to_vma(op-
> > >base.prefetch.va), job);
> > break;
> > + case DRM_GPUVA_OP_USER:
> > + break;
> > default:
> > drm_warn(&vm->xe->drm, "NOT POSSIBLE");
> > }
> > @@ -1339,6 +1371,34 @@ static int xe_pt_userptr_pre_commit(struct
> > xe_migrate_pt_update *pt_update)
> > return err;
> > }
> >
> > +static int xe_pt_svm_pre_commit(struct xe_migrate_pt_update
> > *pt_update)
> > +{
> > + struct xe_vm *vm = pt_update->vops->vm;
> > + struct xe_vma_ops *vops = pt_update->vops;
> > + struct xe_vma_op *op;
> > + int err;
> > +
> > + err = xe_pt_pre_commit(pt_update);
> > + if (err)
> > + return err;
> > +
> > + xe_svm_notifier_lock(vm);
> > +
> > + list_for_each_entry(op, &vops->list, link) {
> > + struct xe_svm_range *range = op->map_range.range;
> > +
> > + xe_assert(vm->xe, xe_vma_is_system_allocator(op-
> > >map_range.vma));
> > + xe_assert(vm->xe, op->subop ==
> > XE_VMA_SUBOP_MAP_RANGE);
> > +
> > + if (!xe_svm_range_pages_valid(range)) {
> > + xe_svm_notifier_unlock(vm);
> > + return -EAGAIN;
> > + }
> > + }
> > +
> > + return 0;
> > +}
> > +
> > struct invalidation_fence {
> > struct xe_gt_tlb_invalidation_fence base;
> > struct xe_gt *gt;
> > @@ -1632,12 +1692,12 @@ xe_pt_commit_prepare_unbind(struct xe_vma
> > *vma,
> >
> > static void
> > xe_pt_update_ops_rfence_interval(struct xe_vm_pgtable_update_ops
> > *pt_update_ops,
> > - struct xe_vma *vma)
> > + u64 start, u64 end)
> > {
> > + u64 last;
> > u32 current_op = pt_update_ops->current_op;
> > struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops-
> > >ops[current_op];
> > int i, level = 0;
> > - u64 start, last;
> >
> > for (i = 0; i < pt_op->num_entries; i++) {
> > const struct xe_vm_pgtable_update *entry = &pt_op-
> > >entries[i];
> > @@ -1647,8 +1707,8 @@ xe_pt_update_ops_rfence_interval(struct
> > xe_vm_pgtable_update_ops *pt_update_ops,
> > }
> >
> > /* Greedy (non-optimal) calculation but simple */
> > - start = ALIGN_DOWN(xe_vma_start(vma), 0x1ull <<
> > xe_pt_shift(level));
> > - last = ALIGN(xe_vma_end(vma), 0x1ull << xe_pt_shift(level))
> > - 1;
> > + start = ALIGN_DOWN(start, 0x1ull << xe_pt_shift(level));
> > + last = ALIGN(end, 0x1ull << xe_pt_shift(level)) - 1;
> >
> > if (start < pt_update_ops->start)
> > pt_update_ops->start = start;
> > @@ -1690,7 +1750,7 @@ static int bind_op_prepare(struct xe_vm *vm,
> > struct xe_tile *tile,
> > if (err)
> > return err;
> >
> > - err = xe_pt_prepare_bind(tile, vma, pt_op->entries,
> > + err = xe_pt_prepare_bind(tile, vma, NULL, pt_op->entries,
> > &pt_op->num_entries);
> > if (!err) {
> > xe_tile_assert(tile, pt_op->num_entries <=
> > @@ -1698,7 +1758,9 @@ static int bind_op_prepare(struct xe_vm *vm,
> > struct xe_tile *tile,
> > xe_vm_dbg_print_entries(tile_to_xe(tile), pt_op-
> > >entries,
> > pt_op->num_entries, true);
> >
> > - xe_pt_update_ops_rfence_interval(pt_update_ops,
> > vma);
> > + xe_pt_update_ops_rfence_interval(pt_update_ops,
> > + xe_vma_start(vma),
> > + xe_vma_end(vma));
> > ++pt_update_ops->current_op;
> > pt_update_ops->needs_userptr_lock |=
> > xe_vma_is_userptr(vma);
> >
> > @@ -1732,6 +1794,48 @@ static int bind_op_prepare(struct xe_vm *vm,
> > struct xe_tile *tile,
> > return err;
> > }
> >
> > +static int bind_range_prepare(struct xe_vm *vm, struct xe_tile
> > *tile,
> > + struct xe_vm_pgtable_update_ops
> > *pt_update_ops,
> > + struct xe_vma *vma, struct
> > xe_svm_range *range)
> > +{
> > + u32 current_op = pt_update_ops->current_op;
> > + struct xe_vm_pgtable_update_op *pt_op = &pt_update_ops-
> > >ops[current_op];
> > + int err;
> > +
> > + xe_tile_assert(tile, xe_vma_is_system_allocator(vma));
> > +
> > + vm_dbg(&xe_vma_vm(vma)->xe->drm,
> > + "Preparing bind, with range [%llx...%llx)\n",
> > + range->base.va.start, range->base.va.end - 1);
> > +
> > + pt_op->vma = NULL;
> > + pt_op->bind = true;
> > + pt_op->rebind = BIT(tile->id) & range->tile_present;
> > +
> > + err = xe_pt_prepare_bind(tile, vma, range, pt_op->entries,
> > + &pt_op->num_entries);
> > + if (!err) {
> > + xe_tile_assert(tile, pt_op->num_entries <=
> > + ARRAY_SIZE(pt_op->entries));
> > + xe_vm_dbg_print_entries(tile_to_xe(tile), pt_op-
> > >entries,
> > + pt_op->num_entries, true);
> > +
> > + xe_pt_update_ops_rfence_interval(pt_update_ops,
> > + range-
> > >base.va.start,
> > + range-
> > >base.va.end);
> > + ++pt_update_ops->current_op;
> > + pt_update_ops->needs_svm_lock = true;
> > +
> > + pt_op->vma = vma;
> > + xe_pt_commit_prepare_bind(vma, pt_op->entries,
> > + pt_op->num_entries, pt_op-
> > >rebind);
> > + } else {
> > + xe_pt_cancel_bind(vma, pt_op->entries, pt_op-
> > >num_entries);
> > + }
> > +
> > + return err;
> > +}
> > +
> > static int unbind_op_prepare(struct xe_tile *tile,
> > struct xe_vm_pgtable_update_ops
> > *pt_update_ops,
> > struct xe_vma *vma)
> > @@ -1769,7 +1873,8 @@ static int unbind_op_prepare(struct xe_tile
> > *tile,
> >
> > xe_vm_dbg_print_entries(tile_to_xe(tile), pt_op->entries,
> > pt_op->num_entries, false);
> > - xe_pt_update_ops_rfence_interval(pt_update_ops, vma);
> > + xe_pt_update_ops_rfence_interval(pt_update_ops,
> > xe_vma_start(vma),
> > + xe_vma_end(vma));
> > ++pt_update_ops->current_op;
> > pt_update_ops->needs_userptr_lock |= xe_vma_is_userptr(vma);
> > pt_update_ops->needs_invalidation = true;
> > @@ -1839,6 +1944,15 @@ static int op_prepare(struct xe_vm *vm,
> > pt_update_ops->wait_vm_kernel = true;
> > break;
> > }
> > + case DRM_GPUVA_OP_USER:
> > + if (op->subop == XE_VMA_SUBOP_MAP_RANGE) {
>
> See question below on subops
>
> > + xe_assert(vm->xe,
> > xe_vma_is_system_allocator(op->map_range.vma));
> > +
> > + err = bind_range_prepare(vm, tile,
> > pt_update_ops,
> > + op->map_range.vma,
> > + op-
> > >map_range.range);
> > + }
> > + break;
> > default:
> > drm_warn(&vm->xe->drm, "NOT POSSIBLE");
> > }
> > @@ -2020,6 +2134,14 @@ static void op_commit(struct xe_vm *vm,
> > fence2);
> > break;
> > }
> > + case DRM_GPUVA_OP_USER:
> > + {
> > + if (op->subop == XE_VMA_SUBOP_MAP_RANGE) {
> > + op->map_range.range->tile_present |=
> > BIT(tile->id);
> > + op->map_range.range->tile_invalidated &=
> > ~BIT(tile->id);
> > + }
> > + break;
> > + }
> > default:
> > drm_warn(&vm->xe->drm, "NOT POSSIBLE");
> > }
> > @@ -2037,6 +2159,12 @@ static const struct xe_migrate_pt_update_ops
> > userptr_migrate_ops = {
> > .pre_commit = xe_pt_userptr_pre_commit,
> > };
> >
> > +static const struct xe_migrate_pt_update_ops svm_migrate_ops = {
> > + .populate = xe_vm_populate_pgtable,
> > + .clear = xe_migrate_clear_pgtable_callback,
> > + .pre_commit = xe_pt_svm_pre_commit,
> > +};
> > +
> > /**
> > * xe_pt_update_ops_run() - Run PT update operations
> > * @tile: Tile of PT update operations
> > @@ -2062,7 +2190,9 @@ xe_pt_update_ops_run(struct xe_tile *tile,
> > struct xe_vma_ops *vops)
> > struct xe_vma_op *op;
> > int err = 0, i;
> > struct xe_migrate_pt_update update = {
> > - .ops = pt_update_ops->needs_userptr_lock ?
> > + .ops = pt_update_ops->needs_svm_lock ?
> > + &svm_migrate_ops :
> > + pt_update_ops->needs_userptr_lock ?
> > &userptr_migrate_ops :
> > &migrate_ops,
> > .vops = vops,
> > @@ -2183,6 +2313,8 @@ xe_pt_update_ops_run(struct xe_tile *tile,
> > struct xe_vma_ops *vops)
> > &ifence->base.base, &mfence-
> > >base.base);
> > }
> >
> > + if (pt_update_ops->needs_svm_lock)
> > + xe_svm_notifier_unlock(vm);
> > if (pt_update_ops->needs_userptr_lock)
> > up_read(&vm->userptr.notifier_lock);
> >
> > diff --git a/drivers/gpu/drm/xe/xe_pt_types.h
> > b/drivers/gpu/drm/xe/xe_pt_types.h
> > index 384cc04de719..69eab6f37cfe 100644
> > --- a/drivers/gpu/drm/xe/xe_pt_types.h
> > +++ b/drivers/gpu/drm/xe/xe_pt_types.h
> > @@ -104,6 +104,8 @@ struct xe_vm_pgtable_update_ops {
> > u32 num_ops;
> > /** @current_op: current operations */
> > u32 current_op;
> > + /** @needs_svm_lock: Needs SVM lock */
> > + bool needs_svm_lock;
> > /** @needs_userptr_lock: Needs userptr lock */
> > bool needs_userptr_lock;
> > /** @needs_invalidation: Needs invalidation */
> > diff --git a/drivers/gpu/drm/xe/xe_svm.c
> > b/drivers/gpu/drm/xe/xe_svm.c
> > index b2bc259978c4..a9addaea316d 100644
> > --- a/drivers/gpu/drm/xe/xe_svm.c
> > +++ b/drivers/gpu/drm/xe/xe_svm.c
> > @@ -209,8 +209,8 @@ void xe_svm_close(struct xe_vm *vm)
> > xe_assert(vm->xe, xe_vm_is_closed(vm));
> >
> > /* Flush running notifiers making xe_vm_close() visable */
> > - drm_gpusvm_notifier_lock(&vm->svm.gpusvm);
> > - drm_gpusvm_notifier_unlock(&vm->svm.gpusvm);
> > + xe_svm_notifier_lock(vm);
> > + xe_svm_notifier_unlock(vm);
> > }
> >
> > void xe_svm_fini(struct xe_vm *vm)
> > @@ -220,12 +220,22 @@ void xe_svm_fini(struct xe_vm *vm)
> > drm_gpusvm_fini(&vm->svm.gpusvm);
> > }
> >
> > +static bool xe_svm_range_is_valid(struct xe_svm_range *range,
> > + struct xe_tile *tile)
> > +{
> > + return (range->tile_present & ~range->tile_invalidated) &
> > BIT(tile->id);
> > +}
> > +
> > int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
> > struct xe_tile *tile, u64 fault_addr,
> > bool atomic)
> > {
> > struct drm_gpusvm_ctx ctx = { .read_only =
> > xe_vma_read_only(vma), };
> > + struct xe_svm_range *range;
> > struct drm_gpusvm_range *r;
> > + struct drm_exec exec;
> > + struct dma_fence *fence;
> > + ktime_t end = 0;
> > int err;
> >
> > lockdep_assert_held_write(&vm->lock);
> > @@ -239,11 +249,42 @@ int xe_svm_handle_pagefault(struct xe_vm *vm,
> > struct xe_vma *vma,
> > if (IS_ERR(r))
> > return PTR_ERR(r);
> >
> > - err = drm_gpusvm_range_get_pages(&vm->svm.gpusvm, r, false);
> > + range = to_xe_range(r);
> > + if (xe_svm_range_is_valid(range, tile))
> > + return 0;
> > +
> > + err = drm_gpusvm_range_get_pages(&vm->svm.gpusvm, r, &ctx);
> > if (err == -EFAULT || err == -EPERM) /* Corner where CPU
> > mappings have change */
> > goto retry;
> > + if (err)
> > + goto err_out;
> > +
> > +retry_bind:
> > + drm_exec_init(&exec, 0, 0);
> > + drm_exec_until_all_locked(&exec) {
> > + err = drm_exec_lock_obj(&exec, vm->gpuvm.r_obj);
> > + drm_exec_retry_on_contention(&exec);
> > + if (err) {
> > + drm_exec_fini(&exec);
> > + goto err_out;
> > + }
> > +
> > + fence = xe_vm_range_rebind(vm, vma, range, BIT(tile-
> > >id));
> > + if (IS_ERR(fence)) {
> > + drm_exec_fini(&exec);
> > + err = PTR_ERR(fence);
> > + if (err == -EAGAIN)
> > + goto retry;
> > + if (xe_vm_validate_should_retry(&exec, err,
> > &end))
> > + goto retry_bind;
> > + goto err_out;
> > + }
> > + }
> > + drm_exec_fini(&exec);
> >
> > - /* TODO: Issue bind */
> > + dma_fence_wait(fence, false);
> > + dma_fence_put(fence);
> >
> > +err_out:
> > return err;
> > }
> > diff --git a/drivers/gpu/drm/xe/xe_svm.h
> > b/drivers/gpu/drm/xe/xe_svm.h
> > index c91c5f538024..ee0bd1ae655b 100644
> > --- a/drivers/gpu/drm/xe/xe_svm.h
> > +++ b/drivers/gpu/drm/xe/xe_svm.h
> > @@ -29,4 +29,21 @@ int xe_svm_handle_pagefault(struct xe_vm *vm,
> > struct xe_vma *vma,
> > struct xe_tile *tile, u64 fault_addr,
> > bool atomic);
> >
> > +static inline bool xe_svm_range_pages_valid(struct xe_svm_range
> > *range)
> > +{
> > + return drm_gpusvm_range_pages_valid(range->base.gpusvm,
> > &range->base);
> > +}
> > +
> > +static inline bool xe_svm_range_has_dma_mapping(struct xe_svm_range
> > *range)
> > +{
> > + lockdep_assert_held(&range->base.gpusvm->notifier_lock);
> > + return range->base.flags.has_dma_mapping;
> > +}
> > +
> > +#define xe_svm_notifier_lock(vm__) \
> > + drm_gpusvm_notifier_lock(&(vm__)->svm.gpusvm)
> > +
> > +#define xe_svm_notifier_unlock(vm__) \
> > + drm_gpusvm_notifier_unlock(&(vm__)->svm.gpusvm)
> > +
> > #endif
> > diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
> > index b11fb0ac9520..63aa0a25d3b7 100644
> > --- a/drivers/gpu/drm/xe/xe_vm.c
> > +++ b/drivers/gpu/drm/xe/xe_vm.c
> > @@ -894,6 +894,84 @@ struct dma_fence *xe_vma_rebind(struct xe_vm
> > *vm, struct xe_vma *vma, u8 tile_ma
> > return fence;
> > }
> >
> > +static void xe_vm_populate_range_rebind(struct xe_vma_op *op,
> > + struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > + u8 tile_mask)
> > +{
> > + INIT_LIST_HEAD(&op->link);
> > + op->tile_mask = tile_mask;
> > + op->base.op = DRM_GPUVA_OP_USER;
> > + op->subop = XE_VMA_SUBOP_MAP_RANGE;
> > + op->map_range.vma = vma;
> > + op->map_range.range = range;
> > +}
> > +
> > +static int
> > +xe_vm_ops_add_range_rebind(struct xe_vma_ops *vops,
> > + struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > + u8 tile_mask)
> > +{
> > + struct xe_vma_op *op;
> > +
> > + op = kzalloc(sizeof(*op), GFP_KERNEL);
> > + if (!op)
> > + return -ENOMEM;
> > +
> > + xe_vm_populate_range_rebind(op, vma, range, tile_mask);
> > + list_add_tail(&op->link, &vops->list);
> > + xe_vma_ops_incr_pt_update_ops(vops, tile_mask);
> > +
> > + return 0;
> > +}
> > +
> > +struct dma_fence *xe_vm_range_rebind(struct xe_vm *vm,
> > + struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > + u8 tile_mask)
>
> kerneldoc
>
Will add.
> > +{
> > + struct dma_fence *fence = NULL;
> > + struct xe_vma_ops vops;
> > + struct xe_vma_op *op, *next_op;
> > + struct xe_tile *tile;
> > + u8 id;
> > + int err;
> > +
> > + lockdep_assert_held(&vm->lock);
> > + xe_vm_assert_held(vm);
> > + xe_assert(vm->xe, xe_vm_in_fault_mode(vm));
> > + xe_assert(vm->xe, xe_vma_is_system_allocator(vma));
> > +
> > + xe_vma_ops_init(&vops, vm, NULL, NULL, 0);
> > + for_each_tile(tile, vm->xe, id) {
> > + vops.pt_update_ops[id].wait_vm_bookkeep = true;
> > + vops.pt_update_ops[tile->id].q =
> > + xe_tile_migrate_exec_queue(tile);
> > + }
> > +
> > + err = xe_vm_ops_add_range_rebind(&vops, vma, range,
> > tile_mask);
> > + if (err)
> > + return ERR_PTR(err);
> > +
> > + err = xe_vma_ops_alloc(&vops, false);
> > + if (err) {
> > + fence = ERR_PTR(err);
> > + goto free_ops;
> > + }
> > +
> > + fence = ops_execute(vm, &vops);
> > +
> > +free_ops:
> > + list_for_each_entry_safe(op, next_op, &vops.list, link) {
> > + list_del(&op->link);
> > + kfree(op);
> > + }
> > + xe_vma_ops_fini(&vops);
> > +
> > + return fence;
> > +}
> > +
> > static void xe_vma_free(struct xe_vma *vma)
> > {
> > if (xe_vma_is_userptr(vma))
> > @@ -2514,6 +2592,8 @@ static void op_trace(struct xe_vma_op *op)
> > case DRM_GPUVA_OP_PREFETCH:
> > trace_xe_vma_bind(gpuva_to_vma(op-
> > >base.prefetch.va));
> > break;
> > + case DRM_GPUVA_OP_USER:
> > + break;
> > default:
> > XE_WARN_ON("NOT POSSIBLE");
> > }
> > diff --git a/drivers/gpu/drm/xe/xe_vm.h b/drivers/gpu/drm/xe/xe_vm.h
> > index 1a5aed678214..8bd921b33090 100644
> > --- a/drivers/gpu/drm/xe/xe_vm.h
> > +++ b/drivers/gpu/drm/xe/xe_vm.h
> > @@ -22,6 +22,7 @@ struct ttm_validate_buffer;
> > struct xe_exec_queue;
> > struct xe_file;
> > struct xe_sync_entry;
> > +struct xe_svm_range;
> > struct drm_exec;
> >
> > struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags);
> > @@ -217,6 +218,10 @@ int xe_vm_userptr_check_repin(struct xe_vm *vm);
> > int xe_vm_rebind(struct xe_vm *vm, bool rebind_worker);
> > struct dma_fence *xe_vma_rebind(struct xe_vm *vm, struct xe_vma
> > *vma,
> > u8 tile_mask);
> > +struct dma_fence *xe_vm_range_rebind(struct xe_vm *vm,
> > + struct xe_vma *vma,
> > + struct xe_svm_range *range,
> > + u8 tile_mask);
> >
> > int xe_vm_invalidate_vma(struct xe_vma *vma);
> >
> > diff --git a/drivers/gpu/drm/xe/xe_vm_types.h
> > b/drivers/gpu/drm/xe/xe_vm_types.h
> > index bd1c0e368238..b736e53779d2 100644
> > --- a/drivers/gpu/drm/xe/xe_vm_types.h
> > +++ b/drivers/gpu/drm/xe/xe_vm_types.h
> > @@ -19,6 +19,7 @@
> > #include "xe_range_fence.h"
> >
> > struct xe_bo;
> > +struct xe_svm_range;
> > struct xe_sync_entry;
> > struct xe_user_fence;
> > struct xe_vm;
> > @@ -334,6 +335,14 @@ struct xe_vma_op_prefetch {
> > u32 region;
> > };
> >
> > +/** struct xe_vma_op_map_range - VMA map range operation */
> > +struct xe_vma_op_map_range {
> > + /** @vma: VMA to map (system allocator VMA) */
> > + struct xe_vma *vma;
> > + /** @range: SVM range to map */
> > + struct xe_svm_range *range;
> > +};
> > +
> > /** enum xe_vma_op_flags - flags for VMA operation */
> > enum xe_vma_op_flags {
> > /** @XE_VMA_OP_COMMITTED: VMA operation committed */
> > @@ -344,6 +353,12 @@ enum xe_vma_op_flags {
> > XE_VMA_OP_NEXT_COMMITTED = BIT(2),
> > };
> >
> > +/** enum xe_vma_subop - VMA sub-operation */
> > +enum xe_vma_subop {
> > + /** @XE_VMA_SUBOP_MAP_RANGE: Map range */
> > + XE_VMA_SUBOP_MAP_RANGE,
>
> Instead of introducing subops, should we perhaps consider
> DRM_GPUVMA_OP_USER plus any following op as driver defined so that the
> next subop would instead be DRM_GPUVMA_OP_USER + 1?
>
Since DRM_GPUVMA_OP_* is an enum that doesn't really work (think case
statements + warnings). At one point I had this way but then we need to
define a new enum for *every* driver defined op.
e.g.
DRM_GPUVMA_OP_USER1 -> Range MAP
DRM_GPUVMA_OP_USER2 -> Range UNMAP
So with this, I justed added 1 driver enum entry plus subops. Ofc if we
changed DRM_GPUVMA_OP_* to define I think this problem goes away but
that would need a larger community buy in.
> > +};
> > +
> > /** struct xe_vma_op - VMA operation */
> > struct xe_vma_op {
> > /** @base: GPUVA base operation */
> > @@ -352,6 +367,8 @@ struct xe_vma_op {
> > struct list_head link;
> > /** @flags: operation flags */
> > enum xe_vma_op_flags flags;
> > + /** @subop: user defined sub-operation */
> > + enum xe_vma_subop subop;
> > /** @tile_mask: Tile mask for operation */
> > u8 tile_mask;
> >
> > @@ -362,6 +379,8 @@ struct xe_vma_op {
> > struct xe_vma_op_remap remap;
> > /** @prefetch: VMA prefetch operation specific data
> > */
> > struct xe_vma_op_prefetch prefetch;
> > + /** @map: VMA map range operation specific data */
> > + struct xe_vma_op_map_range map_range;
> > };
> > };
> >
>
> Thanks,
Thanks,
Matt
> Thomas
>
