On Tue, Aug 30, 2022 at 06:37:55PM +0100, Matthew Auld wrote:
On 27/08/2022 20:43, Andi Shyti wrote:
From: Niranjana Vishwanathapura <niranjana.vishwanathap...@intel.com>
Implement the bind and unbind of an object at the specified GPU virtual
addresses.
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathap...@intel.com>
Signed-off-by: Prathap Kumar Valsan <prathap.kumar.val...@intel.com>
Signed-off-by: Ramalingam C <ramalinga...@intel.com>
Signed-off-by: Andi Shyti <andi.sh...@linux.intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h | 21 ++
.../drm/i915/gem/i915_gem_vm_bind_object.c | 322 ++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_gtt.c | 10 +
drivers/gpu/drm/i915/gt/intel_gtt.h | 9 +
drivers/gpu/drm/i915/i915_driver.c | 1 +
drivers/gpu/drm/i915/i915_vma.c | 3 +-
drivers/gpu/drm/i915/i915_vma.h | 2 -
drivers/gpu/drm/i915/i915_vma_types.h | 14 +
include/uapi/drm/i915_drm.h | 163 +++++++++
10 files changed, 543 insertions(+), 3 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 522ef9b4aff32..4e1627e96c6e0 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_vm_bind.h
b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h
new file mode 100644
index 0000000000000..ebc493b7dafc1
--- /dev/null
+++ b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __I915_GEM_VM_BIND_H
+#define __I915_GEM_VM_BIND_H
+
+#include "i915_drv.h"
+
+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_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+int i915_gem_vm_unbind_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file);
+
+void i915_gem_vm_unbind_vma_all(struct i915_address_space *vm);
+#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 0000000000000..dadd1d4b1761b
--- /dev/null
+++ b/drivers/gpu/drm/i915/gem/i915_gem_vm_bind_object.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include <linux/interval_tree_generic.h>
+
+#include "gem/i915_gem_vm_bind.h"
+#include "gem/i915_gem_context.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) vm_bind_lock 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) 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.
+ *
+ * 3) Spinlock/s to protect some of the VM's lists like the list of
+ * invalidated vmas (due to eviction and userptr invalidation) etc.
+ */
+
+/**
+ * i915_gem_vm_bind_lookup_vma() - lookup for the vma with a starting addr
+ * @vm: virtual address space in which vma needs to be looked for
+ * @va: starting addr of the vma
+ *
+ * retrieves the vma with a starting address from the vm's vma tree.
+ *
+ * Returns: returns vma on success, NULL on failure.
+ */
+struct i915_vma *
+i915_gem_vm_bind_lookup_vma(struct i915_address_space *vm, u64 va)
+{
+ lockdep_assert_held(&vm->vm_bind_lock);
+
+ return i915_vm_bind_it_iter_first(&vm->va, va, va);
+}
+
+/**
+ * i915_gem_vm_bind_remove() - Remove vma from the vm bind list
+ * @vma: vma that needs to be removed
+ * @release_obj: object to be release or not
+ *
+ * Removes the vma from the vm's lists custom interval tree
+ */
+void i915_gem_vm_bind_remove(struct i915_vma *vma, bool release_obj)
+{
+ lockdep_assert_held(&vma->vm->vm_bind_lock);
+
+ 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_gem_object_put(vma->obj);
+ }
+}
+
+static int i915_gem_vm_unbind_vma(struct i915_address_space *vm,
+ struct i915_vma *vma,
+ struct drm_i915_gem_vm_unbind *va)
+{
+ struct drm_i915_gem_object *obj;
+ int ret;
+
+ if (vma) {
+ obj = vma->obj;
+ i915_vma_destroy(vma);
+
+ goto exit;
+ }
This function overloading based on whether vma is NULL or not
doesn't look right. More on this below.
+
+ if (!va)
+ return -EINVAL;
+
+ ret = mutex_lock_interruptible(&vm->vm_bind_lock);
+ if (ret)
+ return ret;
+
+ va->start = gen8_noncanonical_addr(va->start);
+ vma = i915_gem_vm_bind_lookup_vma(vm, va->start);
+
+ if (!vma)
+ ret = -ENOENT;
+ else if (vma->size != va->length)
+ ret = -EINVAL;
+
+ if (ret) {
+ mutex_unlock(&vm->vm_bind_lock);
+ return ret;
+ }
+
+ i915_gem_vm_bind_remove(vma, false);
+
+ mutex_unlock(&vm->vm_bind_lock);
+
+ /* 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);
+
+exit:
+ i915_gem_object_put(obj);
+
+ return 0;
+}
+
+/**
+ * i915_gem_vm_unbind_vma_all() - Unbind all vmas from an address space
+ * @vm: Address spece from which vma binding needs to be removed
+ *
+ * Unbind all userspace requested object binding
+ */
+void i915_gem_vm_unbind_vma_all(struct i915_address_space *vm)
+{
+ struct i915_vma *vma, *t;
+
+ list_for_each_entry_safe(vma, t, &vm->vm_bound_list, vm_bind_link)
+ WARN_ON(i915_gem_vm_unbind_vma(vm, vma, NULL));
I think this unbinding should be done for vmas in both vm_bound_list and
vm_bind_list.
+}
+
+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;
+}
+
+static 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 = mutex_lock_interruptible(&vm->vm_bind_lock);
+ if (ret)
+ goto put_obj;
+
+ vma = vm_bind_get_vma(vm, obj, va);
+ if (IS_ERR(vma)) {
+ ret = PTR_ERR(vma);
+ goto unlock_vm;
+ }
+
+ for_i915_gem_ww(&ww, ret, true) {
+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);
+
+out_ww:
+ if (ret == -EDEADLK) {
+ ret = i915_gem_ww_ctx_backoff(&ww);
+ if (!ret)
+ goto retry;
+ } else {
+ /* Hold object reference until vm_unbind */
+ i915_gem_object_get(vma->obj);
+ }
+ }
Just a drive-by-comment, since this looks a little strange at a
glance. The main idea behind for_i915_gem_ww() is to handle this type
of stuff for you.
With the usual pattern this would look something like:
for_i915_gem_ww(&ww, ret, true) {
ret = i915_gem_object_lock(vma->obj, &ww);
if (ret)
continue;
ret = i915_vma_pin_ww(vma, &ww, 0, 0, pin_flags);
if (ret)
continue;
__i915_vma_unpin(vma);
list_add_tail(&vma->vm_bind_link, &vm->vm_bound_list);
i915_vm_bind_it_insert(vma, &vm->va);
i915_gem_object_get(vma->obj);
}
Does that not work here? If it doesn't then probably we shouldn't use
for_i915_gem_ww() here.
Yah, the for_i915_gem_ww() usage here is wrong.
The above pattern by Matt should work here.
Also, vma destruction upon error is missing here and got added in a
later patch. There is no reason not to handle error condition here
in this patch.
Niranjana
+
+unlock_vm:
+ mutex_unlock(&vm->vm_bind_lock);
+
+put_obj:
+ i915_gem_object_put(obj);
+
+ return ret;
+}
+
+/**
+ * i915_gem_vm_bind_ioctl() - ioctl function for binding an obj into
+ * virtual address
+ * @dev: drm device associated to the virtual address
+ * @data: data related to the vm bind required
+ * @file: drm_file related to he ioctl
+ *
+ * Implements a function to bind the object into the virtual address
+ *
+ * Returns 0 on success, error code on failure.
+ */
+int i915_gem_vm_bind_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ 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 ret;
+}
+
+/**
+ * i915_gem_vm_unbind_ioctl() - ioctl function for unbinding an obj from
+ * virtual address
+ * @dev: drm device associated to the virtual address
+ * @data: data related to the binding that needs to be unbinded
+ * @file: drm_file related to the ioctl
+ *
+ * Implements a function to unbind the object from the virtual address
+ *
+ * Returns 0 on success, error code on failure.
+ */
+int i915_gem_vm_unbind_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file)
+{
+ 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_vma(vm, NULL, args);
By passing NULL for vma, we are essentially calling i915_vma_destroy()
here. But I think we should be calling i915_gem_vm_bind_remove() also.
So, this function overloading based on vma being NULL or not doesn't
look right to me.
+
+ i915_vm_put(vm);
+ return ret;
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c
b/drivers/gpu/drm/i915/gt/intel_gtt.c
index b67831833c9a3..cb188377b7bd9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -12,6 +12,7 @@
#include "gem/i915_gem_internal.h"
#include "gem/i915_gem_lmem.h"
+#include "gem/i915_gem_vm_bind.h"
#include "i915_trace.h"
#include "i915_utils.h"
#include "intel_gt.h"
@@ -176,6 +177,8 @@ 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);
}
/**
@@ -204,6 +207,8 @@ static void __i915_vm_release(struct work_struct *work)
__i915_vm_close(vm);
+ i915_gem_vm_unbind_vma_all(vm);
+
/* Synchronize async unbinds. */
i915_vma_resource_bind_dep_sync_all(vm);
@@ -282,6 +287,11 @@ 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 da21088890b3b..06a259475816b 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;
+ /** @vm_bind_lock: Mutex to protect @vm_bind_list and @vm_bound_list */
+ struct mutex vm_bind_lock;
+ /** @vm_bind_list: List of vm_binding in process */
+ struct list_head vm_bind_list;
+ /** @vm_bound_list: List of vm_binding completed */
+ 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 1332c70370a68..9a9010fd9ecfa 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"
Not used, should be removed.
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 2603717164900..092ae4309d8a1 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);
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 33a58f605d75c..15eac55a3e274 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 be6e028c3b57d..f746fecae85ed 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -289,6 +289,20 @@ struct i915_vma {
/** This object's place on the active/inactive lists */
struct list_head vm_link;
+ /** @vm_bind_link: node for the vm_bind related lists of vm */
+ struct list_head vm_bind_link;
+
+ /** Interval tree structures for persistent vma */
+
+ /** @rb: node for the interval tree of vm for persistent vmas */
+ struct rb_node rb;
+ /** @start: start endpoint of the rb node */
+ u64 start;
+ /** @last: Last endpoint of the rb node */
+ u64 last;
+ /** @__subtree_last: last in subtree */
+ 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;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 12435db751eb8..3da0e07f84bbd 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1507,6 +1507,41 @@ struct drm_i915_gem_execbuffer2 {
#define i915_execbuffer2_get_context_id(eb2) \
((eb2).rsvd1 & I915_EXEC_CONTEXT_ID_MASK)
+/**
+ * struct drm_i915_gem_timeline_fence - An input or output timeline fence.
+ *
+ * The operation will wait for input fence to signal.
+ *
+ * The returned output fence will be signaled after the completion of the
+ * operation.
+ */
+struct drm_i915_gem_timeline_fence {
+ /** @handle: User's handle for a drm_syncobj to wait on or signal. */
+ __u32 handle;
+
+ /**
+ * @flags: Supported flags are:
+ *
+ * I915_TIMELINE_FENCE_WAIT:
+ * Wait for the input fence before the operation.
+ *
+ * I915_TIMELINE_FENCE_SIGNAL:
+ * Return operation completion fence as output.
+ */
+ __u32 flags;
+#define I915_TIMELINE_FENCE_WAIT (1 << 0)
+#define I915_TIMELINE_FENCE_SIGNAL (1 << 1)
+#define __I915_TIMELINE_FENCE_UNKNOWN_FLAGS (-(I915_TIMELINE_FENCE_SIGNAL <<
1))
+
+ /**
+ * @value: A point in the timeline.
+ * Value must be 0 for a binary drm_syncobj. A Value of 0 for a
+ * timeline drm_syncobj is invalid as it turns a drm_syncobj into a
+ * binary one.
+ */
+ __u64 value;
+};
+
struct drm_i915_gem_pin {
/** Handle of the buffer to be pinned. */
__u32 handle;
@@ -3718,6 +3753,134 @@ struct drm_i915_gem_create_ext_protected_content {
/* ID of the protected content session managed by i915 when PXP is active */
#define I915_PROTECTED_CONTENT_DEFAULT_SESSION 0xf
+/**
+ * struct drm_i915_gem_vm_bind - VA to object mapping to bind.
+ *
+ * This structure is passed to VM_BIND ioctl and specifies the mapping of GPU
+ * virtual address (VA) range to the section of an object that should be bound
+ * in the device page table of the specified address space (VM).
+ * The VA range specified must be unique (ie., not currently bound) and can
+ * be mapped to whole object or a section of the object (partial binding).
+ * Multiple VA mappings can be created to the same section of the object
+ * (aliasing).
+ *
+ * The @start, @offset and @length must be 4K page aligned. However the DG2
+ * and XEHPSDV has 64K page size for device local memory and has compact page
+ * table. On those platforms, for binding device local-memory objects, the
+ * @start, @offset and @length must be 64K aligned. Also, UMDs should not mix
+ * the local memory 64K page and the system memory 4K page bindings in the same
+ * 2M range.
+ *
+ * Error code -EINVAL will be returned if @start, @offset and @length are not
+ * properly aligned. In version 1 (See I915_PARAM_VM_BIND_VERSION), error code
+ * -ENOSPC will be returned if the VA range specified can't be reserved.
+ *
+ * VM_BIND/UNBIND ioctl calls executed on different CPU threads concurrently
+ * are not ordered. Furthermore, parts of the VM_BIND operation can be done
+ * asynchronously, if valid @fence is specified.
+ */
+struct drm_i915_gem_vm_bind {
+ /** @vm_id: VM (address space) id to bind */
+ __u32 vm_id;
+
+ /** @handle: Object handle */
+ __u32 handle;
+
+ /** @start: Virtual Address start to bind */
+ __u64 start;
+
+ /** @offset: Offset in object to bind */
+ __u64 offset;
+
+ /** @length: Length of mapping to bind */
+ __u64 length;
+
+ /**
+ * @flags: Currently reserved, MBZ.
+ *
+ * Note that @fence carries its own flags.
+ */
+ __u64 flags;
+
+ /**
+ * @fence: Timeline fence for bind completion signaling.
+ *
+ * Timeline fence is of format struct drm_i915_gem_timeline_fence.
+ *
+ * It is an out fence, hence using I915_TIMELINE_FENCE_WAIT flag
+ * is invalid, and an error will be returned.
+ *
+ * If I915_TIMELINE_FENCE_SIGNAL flag is not set, then out fence
+ * is not requested and binding is completed synchronously.
+ */
+ struct drm_i915_gem_timeline_fence fence;
+
+ /**
+ * @extensions: Zero-terminated chain of extensions.
+ *
+ * For future extensions. See struct i915_user_extension.
+ */
+ __u64 extensions;
+};
+
+/**
+ * struct drm_i915_gem_vm_unbind - VA to object mapping to unbind.
+ *
+ * This structure is passed to VM_UNBIND ioctl and specifies the GPU virtual
+ * address (VA) range that should be unbound from the device page table of the
+ * specified address space (VM). VM_UNBIND will force unbind the specified
+ * range from device page table without waiting for any GPU job to complete.
+ * It is UMDs responsibility to ensure the mapping is no longer in use before
+ * calling VM_UNBIND.
+ *
+ * If the specified mapping is not found, the ioctl will simply return without
+ * any error.
+ *
+ * VM_BIND/UNBIND ioctl calls executed on different CPU threads concurrently
+ * are not ordered. Furthermore, parts of the VM_UNBIND operation can be done
+ * asynchronously, if valid @fence is specified.
+ */
+struct drm_i915_gem_vm_unbind {
+ /** @vm_id: VM (address space) id to bind */
+ __u32 vm_id;
+
+ /** @rsvd: Reserved, MBZ */
+ __u32 rsvd;
+
+ /** @start: Virtual Address start to unbind */
+ __u64 start;
+
+ /** @length: Length of mapping to unbind */
+ __u64 length;
+
+ /**
+ * @flags: Currently reserved, MBZ.
+ *
+ * Note that @fence carries its own flags.
+ */
+ __u64 flags;
+
+ /**
+ * @fence: Timeline fence for unbind completion signaling.
+ *
+ * Timeline fence is of format struct drm_i915_gem_timeline_fence.
+ *
+ * It is an out fence, hence using I915_TIMELINE_FENCE_WAIT flag
+ * is invalid, and an error will be returned.
+ *
+ * If I915_TIMELINE_FENCE_SIGNAL flag is not set, then out fence
+ * is not requested and unbinding is completed synchronously.
+ */
+ struct drm_i915_gem_timeline_fence fence;
+
+ /**
+ * @extensions: Zero-terminated chain of extensions.
+ *
+ * For future extensions. See struct i915_user_extension.
+ */
+ __u64 extensions;
+};
+
#if defined(__cplusplus)
}
#endif
