Bind and unbind the mappings upon VM_BIND and VM_UNBIND calls. Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx> Signed-off-by: Prathap Kumar Valsan <prathap.kumar.valsan@xxxxxxxxx> --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/gem/i915_gem_create.c | 10 +- drivers/gpu/drm/i915/gem/i915_gem_object.h | 2 + drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h | 38 +++ .../drm/i915/gem/i915_gem_vm_bind_object.c | 233 ++++++++++++++++++ drivers/gpu/drm/i915/gt/intel_gtt.c | 7 + drivers/gpu/drm/i915/gt/intel_gtt.h | 9 + drivers/gpu/drm/i915/i915_driver.c | 11 +- drivers/gpu/drm/i915/i915_vma.c | 7 +- drivers/gpu/drm/i915/i915_vma.h | 2 - drivers/gpu/drm/i915/i915_vma_types.h | 8 + 11 files changed, 318 insertions(+), 10 deletions(-) create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 522ef9b4aff3..4e1627e96c6e 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -165,6 +165,7 @@ gem-y += \ gem/i915_gem_ttm_move.o \ gem/i915_gem_ttm_pm.o \ gem/i915_gem_userptr.o \ + gem/i915_gem_vm_bind_object.o \ gem/i915_gem_wait.o \ gem/i915_gemfs.o i915-y += \ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c index 33673fe7ee0a..927a87e5ec59 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c @@ -15,10 +15,10 @@ #include "i915_trace.h" #include "i915_user_extensions.h" -static u32 object_max_page_size(struct intel_memory_region **placements, - unsigned int n_placements) +u32 i915_gem_object_max_page_size(struct intel_memory_region **placements, + unsigned int n_placements) { - u32 max_page_size = 0; + u32 max_page_size = I915_GTT_PAGE_SIZE_4K; int i; for (i = 0; i < n_placements; i++) { @@ -28,7 +28,6 @@ static u32 object_max_page_size(struct intel_memory_region **placements, max_page_size = max_t(u32, max_page_size, mr->min_page_size); } - GEM_BUG_ON(!max_page_size); return max_page_size; } @@ -99,7 +98,8 @@ __i915_gem_object_create_user_ext(struct drm_i915_private *i915, u64 size, i915_gem_flush_free_objects(i915); - size = round_up(size, object_max_page_size(placements, n_placements)); + size = round_up(size, i915_gem_object_max_page_size(placements, + n_placements)); if (size == 0) return ERR_PTR(-EINVAL); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index 6f0a3ce35567..650de2224843 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -47,6 +47,8 @@ static inline bool i915_gem_object_size_2big(u64 size) } void i915_gem_init__objects(struct drm_i915_private *i915); +u32 i915_gem_object_max_page_size(struct intel_memory_region **placements, + unsigned int n_placements); void i915_objects_module_exit(void); int i915_objects_module_init(void); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h new file mode 100644 index 000000000000..642cdb559f17 --- /dev/null +++ b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2022 Intel Corporation + */ + +#ifndef __I915_GEM_VM_BIND_H +#define __I915_GEM_VM_BIND_H + +#include "i915_drv.h" + +#define assert_vm_bind_held(vm) lockdep_assert_held(&(vm)->vm_bind_lock) + +static inline void i915_gem_vm_bind_lock(struct i915_address_space *vm) +{ + mutex_lock(&vm->vm_bind_lock); +} + +static inline int +i915_gem_vm_bind_lock_interruptible(struct i915_address_space *vm) +{ + return mutex_lock_interruptible(&vm->vm_bind_lock); +} + +static inline void i915_gem_vm_bind_unlock(struct i915_address_space *vm) +{ + mutex_unlock(&vm->vm_bind_lock); +} + +struct i915_vma * +i915_gem_vm_bind_lookup_vma(struct i915_address_space *vm, u64 va); +void i915_gem_vm_bind_remove(struct i915_vma *vma, bool release_obj); +int i915_gem_vm_bind_obj(struct i915_address_space *vm, + struct drm_i915_gem_vm_bind *va, + struct drm_file *file); +int i915_gem_vm_unbind_obj(struct i915_address_space *vm, + struct drm_i915_gem_vm_unbind *va); + +#endif /* __I915_GEM_VM_BIND_H */ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c new file mode 100644 index 000000000000..43ceb4dcca6c --- /dev/null +++ b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include <linux/interval_tree_generic.h> + +#include "gem/i915_gem_vm_bind.h" +#include "gt/gen8_engine_cs.h" + +#include "i915_drv.h" +#include "i915_gem_gtt.h" + +#define START(node) ((node)->start) +#define LAST(node) ((node)->last) + +INTERVAL_TREE_DEFINE(struct i915_vma, rb, u64, __subtree_last, + START, LAST, static inline, i915_vm_bind_it) + +#undef START +#undef LAST + +/** + * DOC: VM_BIND/UNBIND ioctls + * + * DRM_I915_GEM_VM_BIND/UNBIND ioctls allows UMD to bind/unbind GEM buffer + * objects (BOs) or sections of a BOs at specified GPU virtual addresses on a + * specified address space (VM). Multiple mappings can map to the same physical + * pages of an object (aliasing). These mappings (also referred to as persistent + * mappings) will be persistent across multiple GPU submissions (execbuf calls) + * issued by the UMD, without user having to provide a list of all required + * mappings during each submission (as required by older execbuf mode). + * + * The VM_BIND/UNBIND calls allow UMDs to request a timeline out fence for + * signaling the completion of bind/unbind operation. + * + * VM_BIND feature is advertised to user via I915_PARAM_VM_BIND_VERSION. + * User has to opt-in for VM_BIND mode of binding for an address space (VM) + * during VM creation time via I915_VM_CREATE_FLAGS_USE_VM_BIND extension. + * + * VM_BIND/UNBIND ioctl calls executed on different CPU threads concurrently + * are not ordered. Furthermore, parts of the VM_BIND/UNBIND operations can be + * done asynchronously, when valid out fence is specified. + * + * VM_BIND locking order is as below. + * + * 1) Lock-A: A vm_bind mutex will protect vm_bind lists. This lock is taken in + * vm_bind/vm_unbind ioctl calls, in the execbuf path and while releasing the + * mapping. + * + * In future, when GPU page faults are supported, we can potentially use a + * rwsem instead, so that multiple page fault handlers can take the read + * side lock to lookup the mapping and hence can run in parallel. + * The older execbuf mode of binding do not need this lock. + * + * 2) Lock-B: The object's dma-resv lock will protect i915_vma state and needs + * to be held while binding/unbinding a vma in the async worker and while + * updating dma-resv fence list of an object. Note that private BOs of a VM + * will all share a dma-resv object. + * + * The future system allocator support will use the HMM prescribed locking + * instead. + * + * 3) Lock-C: Spinlock/s to protect some of the VM's lists like the list of + * invalidated vmas (due to eviction and userptr invalidation) etc. + */ + +struct i915_vma * +i915_gem_vm_bind_lookup_vma(struct i915_address_space *vm, u64 va) +{ + struct i915_vma *vma, *temp; + + assert_vm_bind_held(vm); + + vma = i915_vm_bind_it_iter_first(&vm->va, va, va); + /* Working around compiler error, remove later */ + if (vma) + temp = i915_vm_bind_it_iter_next(vma, va + vma->size, -1); + return vma; +} + +void i915_gem_vm_bind_remove(struct i915_vma *vma, bool release_obj) +{ + assert_vm_bind_held(vma->vm); + + if (!list_empty(&vma->vm_bind_link)) { + list_del_init(&vma->vm_bind_link); + i915_vm_bind_it_remove(vma, &vma->vm->va); + + /* Release object */ + if (release_obj) + i915_vma_put(vma); + } +} + +int i915_gem_vm_unbind_obj(struct i915_address_space *vm, + struct drm_i915_gem_vm_unbind *va) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int ret; + + va->start = gen8_noncanonical_addr(va->start); + ret = i915_gem_vm_bind_lock_interruptible(vm); + if (ret) + return ret; + + vma = i915_gem_vm_bind_lookup_vma(vm, va->start); + if (!vma) { + ret = -ENOENT; + goto out_unlock; + } + + if (vma->size != va->length) + ret = -EINVAL; + else + i915_gem_vm_bind_remove(vma, false); + +out_unlock: + i915_gem_vm_bind_unlock(vm); + if (ret || !vma) + return ret; + + /* Destroy vma and then release object */ + obj = vma->obj; + ret = i915_gem_object_lock(obj, NULL); + if (ret) + return ret; + + i915_vma_destroy(vma); + i915_gem_object_unlock(obj); + i915_gem_object_put(obj); + + return 0; +} + +static struct i915_vma *vm_bind_get_vma(struct i915_address_space *vm, + struct drm_i915_gem_object *obj, + struct drm_i915_gem_vm_bind *va) +{ + struct i915_ggtt_view view; + struct i915_vma *vma; + + va->start = gen8_noncanonical_addr(va->start); + vma = i915_gem_vm_bind_lookup_vma(vm, va->start); + if (vma) + return ERR_PTR(-EEXIST); + + view.type = I915_GGTT_VIEW_PARTIAL; + view.partial.offset = va->offset >> PAGE_SHIFT; + view.partial.size = va->length >> PAGE_SHIFT; + vma = i915_vma_instance(obj, vm, &view); + if (IS_ERR(vma)) + return vma; + + vma->start = va->start; + vma->last = va->start + va->length - 1; + + return vma; +} + +int i915_gem_vm_bind_obj(struct i915_address_space *vm, + struct drm_i915_gem_vm_bind *va, + struct drm_file *file) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma = NULL; + struct i915_gem_ww_ctx ww; + u64 pin_flags; + int ret = 0; + + if (!vm->vm_bind_mode) + return -EOPNOTSUPP; + + obj = i915_gem_object_lookup(file, va->handle); + if (!obj) + return -ENOENT; + + if (!va->length || + !IS_ALIGNED(va->offset | va->length, + i915_gem_object_max_page_size(obj->mm.placements, + obj->mm.n_placements)) || + range_overflows_t(u64, va->offset, va->length, obj->base.size)) { + ret = -EINVAL; + goto put_obj; + } + + ret = i915_gem_vm_bind_lock_interruptible(vm); + if (ret) + goto put_obj; + + vma = vm_bind_get_vma(vm, obj, va); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto unlock_vm; + } + + i915_gem_ww_ctx_init(&ww, true); + pin_flags = va->start | PIN_OFFSET_FIXED | PIN_USER; +retry: + ret = i915_gem_object_lock(vma->obj, &ww); + if (ret) + goto out_ww; + + ret = i915_vma_pin_ww(vma, &ww, 0, 0, pin_flags); + if (ret) + goto out_ww; + + /* Make it evictable */ + __i915_vma_unpin(vma); + + list_add_tail(&vma->vm_bind_link, &vm->vm_bound_list); + i915_vm_bind_it_insert(vma, &vm->va); + + /* Hold object reference until vm_unbind */ + i915_gem_object_get(vma->obj); +out_ww: + if (ret == -EDEADLK) { + ret = i915_gem_ww_ctx_backoff(&ww); + if (!ret) + goto retry; + } + + if (ret) + i915_vma_destroy(vma); + + i915_gem_ww_ctx_fini(&ww); +unlock_vm: + i915_gem_vm_bind_unlock(vm); +put_obj: + i915_gem_object_put(obj); + return ret; +} diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c index b67831833c9a..135dc4a76724 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.c +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c @@ -176,6 +176,8 @@ int i915_vm_lock_objects(struct i915_address_space *vm, void i915_address_space_fini(struct i915_address_space *vm) { drm_mm_takedown(&vm->mm); + GEM_BUG_ON(!RB_EMPTY_ROOT(&vm->va.rb_root)); + mutex_destroy(&vm->vm_bind_lock); } /** @@ -282,6 +284,11 @@ void i915_address_space_init(struct i915_address_space *vm, int subclass) INIT_LIST_HEAD(&vm->bound_list); INIT_LIST_HEAD(&vm->unbound_list); + + vm->va = RB_ROOT_CACHED; + INIT_LIST_HEAD(&vm->vm_bind_list); + INIT_LIST_HEAD(&vm->vm_bound_list); + mutex_init(&vm->vm_bind_lock); } void *__px_vaddr(struct drm_i915_gem_object *p) diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h index c812aa9708ae..d4a6ce65251d 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.h +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h @@ -259,6 +259,15 @@ struct i915_address_space { */ struct list_head unbound_list; + /** + * List of VM_BIND objects. + */ + struct mutex vm_bind_lock; /* Protects vm_bind lists */ + struct list_head vm_bind_list; + struct list_head vm_bound_list; + /* va tree of persistent vmas */ + struct rb_root_cached va; + /* Global GTT */ bool is_ggtt:1; diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index ccf990dfd99b..776ab7844f60 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -68,6 +68,7 @@ #include "gem/i915_gem_ioctls.h" #include "gem/i915_gem_mman.h" #include "gem/i915_gem_pm.h" +#include "gem/i915_gem_vm_bind.h" #include "gt/intel_gt.h" #include "gt/intel_gt_pm.h" #include "gt/intel_rc6.h" @@ -1783,13 +1784,16 @@ static int i915_gem_vm_bind_ioctl(struct drm_device *dev, void *data, { struct drm_i915_gem_vm_bind *args = data; struct i915_address_space *vm; + int ret; vm = i915_gem_vm_lookup(file->driver_priv, args->vm_id); if (unlikely(!vm)) return -ENOENT; + ret = i915_gem_vm_bind_obj(vm, args, file); + i915_vm_put(vm); - return -EINVAL; + return ret; } static int i915_gem_vm_unbind_ioctl(struct drm_device *dev, void *data, @@ -1797,13 +1801,16 @@ static int i915_gem_vm_unbind_ioctl(struct drm_device *dev, void *data, { struct drm_i915_gem_vm_unbind *args = data; struct i915_address_space *vm; + int ret; vm = i915_gem_vm_lookup(file->driver_priv, args->vm_id); if (unlikely(!vm)) return -ENOENT; + ret = i915_gem_vm_unbind_obj(vm, args); + i915_vm_put(vm); - return -EINVAL; + return ret; } static const struct drm_ioctl_desc i915_ioctls[] = { diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 43339ecabd73..d324e29cef0a 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -29,6 +29,7 @@ #include "display/intel_frontbuffer.h" #include "gem/i915_gem_lmem.h" #include "gem/i915_gem_tiling.h" +#include "gem/i915_gem_vm_bind.h" #include "gt/intel_engine.h" #include "gt/intel_engine_heartbeat.h" #include "gt/intel_gt.h" @@ -234,6 +235,7 @@ vma_create(struct drm_i915_gem_object *obj, spin_unlock(&obj->vma.lock); mutex_unlock(&vm->mutex); + INIT_LIST_HEAD(&vma->vm_bind_link); return vma; err_unlock: @@ -290,7 +292,6 @@ i915_vma_instance(struct drm_i915_gem_object *obj, { struct i915_vma *vma; - GEM_BUG_ON(view && !i915_is_ggtt_or_dpt(vm)); GEM_BUG_ON(!kref_read(&vm->ref)); spin_lock(&obj->vma.lock); @@ -1660,6 +1661,10 @@ static void release_references(struct i915_vma *vma, bool vm_ddestroy) spin_unlock(&obj->vma.lock); + i915_gem_vm_bind_lock(vma->vm); + i915_gem_vm_bind_remove(vma, true); + i915_gem_vm_bind_unlock(vma->vm); + spin_lock_irq(>->closed_lock); __i915_vma_remove_closed(vma); spin_unlock_irq(>->closed_lock); diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h index 88ca0bd9c900..dcb49f79ff7e 100644 --- a/drivers/gpu/drm/i915/i915_vma.h +++ b/drivers/gpu/drm/i915/i915_vma.h @@ -164,8 +164,6 @@ i915_vma_compare(struct i915_vma *vma, { ptrdiff_t cmp; - GEM_BUG_ON(view && !i915_is_ggtt_or_dpt(vm)); - cmp = ptrdiff(vma->vm, vm); if (cmp) return cmp; diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h index be6e028c3b57..b6d179bdbfa0 100644 --- a/drivers/gpu/drm/i915/i915_vma_types.h +++ b/drivers/gpu/drm/i915/i915_vma_types.h @@ -289,6 +289,14 @@ struct i915_vma { /** This object's place on the active/inactive lists */ struct list_head vm_link; + struct list_head vm_bind_link; /* Link in persistent VMA list */ + + /** Interval tree structures for persistent vma */ + struct rb_node rb; + u64 start; + u64 last; + u64 __subtree_last; + struct list_head obj_link; /* Link in the object's VMA list */ struct rb_node obj_node; struct hlist_node obj_hash; -- 2.21.0.rc0.32.g243a4c7e27