+ *
+ * Elements popped from the original list are kept in a
local list, so removal
+ * and is_empty checks can still happen while we're
iterating the list.
+ */
+#define get_next_vm_bo_from_list(__gpuvm, __list_name,
__local_list, __prev_vm_bo) \
+ ({
\
+ struct drm_gpuvm_bo
*__vm_bo; \
+
\
+ drm_gpuvm_bo_put(__prev_vm_bo);
\
+
\
+ spin_lock(&(__gpuvm)-
__list_name.lock); \
+ while (!list_empty(&(__gpuvm)-
__list_name.list)) { \
+ __vm_bo =
list_first_entry(&(__gpuvm)->__list_name.list, \
+ struct
drm_gpuvm_bo, \
+
list.entry.__list_name); \
+ if
(drm_gpuvm_bo_get_unless_zero(__vm_bo))
{ \
+ list_move_tail(&(__vm_bo)-
list.entry.__list_name, \
+
__local_list); \
+ break;
\
+ } else
{ \
+ list_del_init(&(__vm_bo)-
list.entry.__list_name); \
+ __vm_bo =
NULL; \
+ }
\
+ }
\
+ spin_unlock(&(__gpuvm)-
__list_name.lock); \
+
\
+ __vm_bo;
\
+ })
+
+/**
+ * for_each_vm_bo_in_list() - internal vm_bo list
iterator
+ *
+ * This helper is here to provide lockless list
iteration.
Lockless as in, the
+ * iterator releases the lock immediately after
picking the
first element from the
+ * list, so list insertion and deletion can happen
concurrently.
+ *
+ * Typical use:
+ *
+ * struct drm_gpuvm_bo *vm_bo;
+ * LIST_HEAD(my_local_list);
+ *
+ * ret = 0;
+ * drm_gpuvm_for_each_vm_bo(gpuvm, <list_name>,
&my_local_list, vm_bo) {
+ * ret = do_something_with_vm_bo(...,
vm_bo);
+ * if (ret)
+ * break;
+ * }
+ * drm_gpuvm_bo_put(vm_bo);
+ * drm_gpuvm_restore_vm_bo_list(gpuvm, <list_name>,
&my_local_list);
+ *
+ *
+ * Only used for internal list iterations, not meant
to be
exposed to the outside
+ * world.
+ */
+#define for_each_vm_bo_in_list(__gpuvm, __list_name,
__local_list, __vm_bo) \
+ for (__vm_bo = get_next_vm_bo_from_list(__gpuvm,
__list_name, \
+ __local_list,
NULL); \
+
__vm_bo;
\
+ __vm_bo = get_next_vm_bo_from_list(__gpuvm,
__list_name, \
+ __local_list,
__vm_bo)) \
+
+/**
+ * restore_vm_bo_list() - move vm_bo elements back
to their
original list
+ * @__gpuvm: The GPU VM
+ * @__list_name: The name of the list we're
iterating on
+ * @__local_list: A pointer to the local list used
to store
already iterated items
+ *
+ * When we're done iterating a vm_bo list, we should
call
restore_vm_bo_list()
+ * to restore the original state and let new
iterations take
place.
+ */
+#define restore_vm_bo_list(__gpuvm, __list_name,
__local_list) \
+ do
{
\
+ /* Merge back the two lists, moving
local
list elements to the \
+ * head to preserve previous
ordering, in
case it matters. \
+
*/
\
+ spin_lock(&(__gpuvm)-
__list_name.lock); \
+ list_splice(__local_list, &(__gpuvm)-
__list_name.list); \
+ spin_unlock(&(__gpuvm)-
__list_name.lock); \
+ } while (0)
+/**
+ * drm_gpuvm_bo_list_add() - insert a vm_bo into the
given
list
+ * @__vm_bo: the &drm_gpuvm_bo
+ * @__list_name: the name of the list to insert into
+ *
+ * Inserts the given @__vm_bo into the list
specified by
@__list_name and
+ * increases the vm_bo's reference count.
+ */
+#define drm_gpuvm_bo_list_add(__vm_bo,
__list_name) \
+ do
{
\
+ spin_lock(&(__vm_bo)->vm-
__list_name.lock); \
+ if (list_empty(&(__vm_bo)-
list.entry.__list_name)) \
+ list_add_tail(&(__vm_bo)-
list.entry.__list_name, \
+ &(__vm_bo)->vm-
__list_name.list); \
+ spin_unlock(&(__vm_bo)->vm-
__list_name.lock); \
+ } while (0)
+
+/**
+ * drm_gpuvm_bo_list_del() - remove a vm_bo from the
given
list
+ * @__vm_bo: the &drm_gpuvm_bo
+ * @__list_name: the name of the list to insert into
+ *
+ * Removes the given @__vm_bo from the list
specified by
@__list_name and
+ * decreases the vm_bo's reference count.
+ */
+#define drm_gpuvm_bo_list_del(__vm_bo,
__list_name) \
+ do
{
\
+ spin_lock(&(__vm_bo)->vm-
__list_name.lock); \
+ if (!list_empty(&(__vm_bo)-
list.entry.__list_name)) \
+ list_del_init(&(__vm_bo)-
list.entry.__list_name); \
+ spin_unlock(&(__vm_bo)->vm-
__list_name.lock); \
+ } while (0)
+
+static int __must_check
+drm_gpuvm_bo_get_unless_zero(struct drm_gpuvm_bo
*vm_bo);
+
#define
to_drm_gpuva(__node) container_of((__node), struct
drm_gpuva, rb.node)
#define GPUVA_START(node) ((node)->va.addr)
@@ -713,6 +867,12 @@ drm_gpuvm_init(struct drm_gpuvm
*gpuvm,
struct drm_device *drm,
gpuvm->rb.tree = RB_ROOT_CACHED;
INIT_LIST_HEAD(&gpuvm->rb.list);
+ INIT_LIST_HEAD(&gpuvm->extobj.list);
+ spin_lock_init(&gpuvm->extobj.lock);
+
+ INIT_LIST_HEAD(&gpuvm->evict.list);
+ spin_lock_init(&gpuvm->evict.lock);
+
��drm_gpuva_check_overflow(start_offset, range);
gpuvm->mm_start = start_offset;
gpuvm->mm_range = range;
@@ -754,10 +914,302 @@ drm_gpuvm_destroy(struct
drm_gpuvm
*gpuvm)
WARN(!RB_EMPTY_ROOT(&gpuvm->rb.tree.rb_root),
"GPUVA tree is not empty, potentially
leaking
memory.\n");
+ WARN(!list_empty(&gpuvm->extobj.list),
"Extobj list
should be empty.\n");
+ WARN(!list_empty(&gpuvm->evict.list), "Evict
list
should be empty.\n");
+
drm_gem_private_object_fini(&gpuvm->d_obj);
}
EXPORT_SYMBOL_GPL(drm_gpuvm_destroy);
+/**
+ * drm_gpuvm_prepare_objects() - prepare all
assoiciated BOs
+ * @gpuvm: the &drm_gpuvm
+ * @exec: the &drm_exec locking context
+ * @num_fences: the amount of &dma_fences to reserve
+ *
+ * Calls drm_exec_prepare_obj() for all
&drm_gem_objects the
given
+ * &drm_gpuvm contains mappings of.
+ *
+ * Using this function directly, it is the drivers
responsibility to call
+ * drm_exec_init() and drm_exec_fini() accordingly.
+ *
+ * Note: This function is safe against concurrent
insertion
and removal of
+ * external objects, however it is not safe against
concurrent usage itself.
+ *
+ * Drivers need to make sure to protect this case with
either an outer VM lock
+ * or by calling drm_gpuvm_prepare_vm() before this
function
within the
+ * drm_exec_until_all_locked() loop, such that the
GPUVM's
dma-resv lock ensures
+ * mutual exclusion.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_prepare_objects(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ unsigned int num_fences)
+{
+ struct drm_gpuvm_bo *vm_bo;
+ LIST_HEAD(extobjs);
+ int ret = 0;
+
+ for_each_vm_bo_in_list(gpuvm, extobj, &extobjs,
vm_bo) {
+ ret = drm_exec_prepare_obj(exec,
vm_bo->obj,
num_fences);
+ if (ret)
+ break;
+ }
+ /* Drop ref in case we break out of the loop. */
+ drm_gpuvm_bo_put(vm_bo);
+ restore_vm_bo_list(gpuvm, extobj, &extobjs);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_prepare_objects);
+
+/**
+ * drm_gpuvm_prepare_range() - prepare all BOs
mapped within
a given range
+ * @gpuvm: the &drm_gpuvm
+ * @exec: the &drm_exec locking context
+ * @addr: the start address within the VA space
+ * @range: the range to iterate within the VA space
+ * @num_fences: the amount of &dma_fences to reserve
+ *
+ * Calls drm_exec_prepare_obj() for all
&drm_gem_objects
mapped between @addr
+ * and @addr + @range.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_prepare_range(struct drm_gpuvm *gpuvm, struct
drm_exec *exec,
+ u64 addr, u64 range, unsigned
int
num_fences)
+{
+ struct drm_gpuva *va;
+ u64 end = addr + range;
+ int ret;
+
+ drm_gpuvm_for_each_va_range(va, gpuvm, addr,
end) {
+ struct drm_gem_object *obj =
va->gem.obj;
+
+ ret = drm_exec_prepare_obj(exec, obj,
num_fences);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_prepare_range);
+
+/**
+ * drm_gpuvm_exec_lock() - lock all dma-resv of all
assoiciated BOs
+ * @vm_exec: the &drm_gpuvm_exec abstraction
+ * @num_fences: the amount of &dma_fences to reserve
+ * @interruptible: sleep interruptible if waiting
+ *
+ * Acquires all dma-resv locks of all
&drm_gem_objects the
given
+ * &drm_gpuvm contains mappings of.
+ *
+ * Addionally, when calling this function with struct
drm_gpuvm_exec::extra
+ * being set the driver receives the given @fn
callback to
lock additional
+ * dma-resv in the context of the &drm_gpuvm_exec
instance.
Typically, drivers
+ * would call drm_exec_prepare_obj() from within this
callback.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_exec_lock(struct drm_gpuvm_exec *vm_exec,
+ unsigned int num_fences,
+ bool interruptible)
+{
+ struct drm_gpuvm *gpuvm = vm_exec->vm;
+ struct drm_exec *exec = &vm_exec->exec;
+ uint32_t flags;
+ int ret;
+
+ flags = interruptible ?
DRM_EXEC_INTERRUPTIBLE_WAIT :
0 |
+ DRM_EXEC_IGNORE_DUPLICATES;
+
+ drm_exec_init(exec, flags);
+
+ drm_exec_until_all_locked(exec) {
+ ret = drm_gpuvm_prepare_vm(gpuvm, exec,
num_fences);
+ drm_exec_retry_on_contention(exec);
+ if (ret)
+ goto err;
+
+ ret =
drm_gpuvm_prepare_objects(gpuvm, exec,
num_fences);
+ drm_exec_retry_on_contention(exec);
+ if (ret)
+ goto err;
+
+ if (vm_exec->extra.fn) {
+ ret = vm_exec->extra.fn(vm_exec,
num_fences);
+ drm_exec_retry_on_contention(exec);
+ if (ret)
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ drm_exec_fini(exec);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_exec_lock);
+
+static int
+fn_lock_array(struct drm_gpuvm_exec *vm_exec,
unsigned int
num_fences)
+{
+ struct {
+ struct drm_gem_object **objs;
+ unsigned int num_objs;
+ } *args = vm_exec->extra.priv;
+
+ return drm_exec_prepare_array(&vm_exec->exec,
args-
objs,
+ args->num_objs,
num_fences);
+}
+
+/**
+ * drm_gpuvm_exec_lock_array() - lock all dma-resv
of all
assoiciated BOs
+ * @vm_exec: the &drm_gpuvm_exec abstraction
+ * @objs: additional &drm_gem_objects to lock
+ * @num_objs: the number of additional
&drm_gem_objects to
lock
+ * @num_fences: the amount of &dma_fences to reserve
+ * @interruptible: sleep interruptible if waiting
+ *
+ * Acquires all dma-resv locks of all
&drm_gem_objects the
given &drm_gpuvm
+ * contains mappings of, plus the ones given through
@objs.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_exec_lock_array(struct drm_gpuvm_exec
*vm_exec,
+ struct drm_gem_object **objs,
+ unsigned int num_objs,
+ unsigned int num_fences,
+ bool interruptible)
+{
+ struct {
+ struct drm_gem_object **objs;
+ unsigned int num_objs;
+ } args;
+
+ args.objs = objs;
+ args.num_objs = num_objs;
+
+ vm_exec->extra.fn = fn_lock_array;
+ vm_exec->extra.priv = &args;
+
+ return drm_gpuvm_exec_lock(vm_exec, num_fences,
interruptible);
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_exec_lock_array);
+
+/**
+ * drm_gpuvm_exec_lock_range() - prepare all BOs mapped
within a given range
+ * @vm_exec: the &drm_gpuvm_exec abstraction
+ * @addr: the start address within the VA space
+ * @range: the range to iterate within the VA space
+ * @num_fences: the amount of &dma_fences to reserve
+ * @interruptible: sleep interruptible if waiting
+ *
+ * Acquires all dma-resv locks of all &drm_gem_objects
mapped between @addr and
+ * @addr + @range.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_exec_lock_range(struct drm_gpuvm_exec
*vm_exec,
+ u64 addr, u64 range,
+ unsigned int num_fences,
+ bool interruptible)
+{
+ struct drm_gpuvm *gpuvm = vm_exec->vm;
+ struct drm_exec *exec = &vm_exec->exec;
+ uint32_t flags;
+ int ret;
+
+ flags = interruptible ?
DRM_EXEC_INTERRUPTIBLE_WAIT :
0 |
+ DRM_EXEC_IGNORE_DUPLICATES;
+
+ drm_exec_init(exec, flags);
+
+ drm_exec_until_all_locked(exec) {
+ ret = drm_gpuvm_prepare_range(gpuvm,
exec,
addr, range,
+ num_fences);
+ drm_exec_retry_on_contention(exec);
+ if (ret)
+ goto err;
+ }
+
+ return ret;
+
+err:
+ drm_exec_fini(exec);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_exec_lock_range);
+
+/**
+ * drm_gpuvm_validate() - validate all BOs marked as
evicted
+ * @gpuvm: the &drm_gpuvm to validate evicted BOs
+ *
+ * Calls the &drm_gpuvm_ops.bo_validate callback for
all
evicted buffer
+ * objects being mapped in the given &drm_gpuvm.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+int
+drm_gpuvm_validate(struct drm_gpuvm *gpuvm)
+{
+ const struct drm_gpuvm_ops *ops = gpuvm->ops;
+ struct drm_gpuvm_bo *vm_bo;
+ LIST_HEAD(evict);
+ int ret = 0;
+
+ if (unlikely(!ops || !ops->bo_validate))
+ return -ENOTSUPP;
+
+ for_each_vm_bo_in_list(gpuvm, evict, &evict,
vm_bo) {
+ dma_resv_assert_held(vm_bo->obj->resv);
+ ret = ops->bo_validate(vm_bo->obj);
+ if (ret)
+ break;
+ }
+ /* Drop ref in case we break out of the loop. */
+ drm_gpuvm_bo_put(vm_bo);
+ restore_vm_bo_list(gpuvm, evict, &evict);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_validate);
+
+/**
+ * drm_gpuvm_resv_add_fence - add fence to private
and all
extobj
+ * dma-resv
+ * @gpuvm: the &drm_gpuvm to add a fence to
+ * @exec: the &drm_exec locking context
+ * @fence: fence to add
+ * @private_usage: private dma-resv usage
+ * @extobj_usage: extobj dma-resv usage
+ */
+void
+drm_gpuvm_resv_add_fence(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ struct dma_fence *fence,
+ enum dma_resv_usage
private_usage,
+ enum dma_resv_usage
extobj_usage)
+{
+ struct drm_gem_object *obj;
+ unsigned long index;
+
+ drm_exec_for_each_locked_object(exec, index,
obj) {
+ dma_resv_assert_held(obj->resv);
+ dma_resv_add_fence(obj->resv, fence,
+ drm_gpuvm_is_extobj(gpuvm,
obj) ?
+ private_usage :
extobj_usage);
+ }
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_resv_add_fence);
+
/**
* drm_gpuvm_bo_create() - create a new instance
of struct
drm_gpuvm_bo
* @gpuvm: The &drm_gpuvm the @obj is mapped in.
@@ -790,6 +1242,9 @@ drm_gpuvm_bo_create(struct
drm_gpuvm
*gpuvm,
INIT_LIST_HEAD(&vm_bo->list.gpuva);
INIT_LIST_HEAD(&vm_bo->list.entry.gem);
+ INIT_LIST_HEAD(&vm_bo->list.entry.extobj);
+ INIT_LIST_HEAD(&vm_bo->list.entry.evict);
+
drm_gem_object_get(obj);
return vm_bo;
@@ -807,6 +1262,14 @@ drm_gpuvm_bo_destroy(struct
kref *kref)
drm_gem_gpuva_assert_lock_held(vm_bo->obj);
+ spin_lock(&gpuvm->extobj.lock);
+ list_del(&vm_bo->list.entry.extobj);
+ spin_unlock(&gpuvm->extobj.lock);
+
+ spin_lock(&gpuvm->evict.lock);
+ list_del(&vm_bo->list.entry.evict);
+ spin_unlock(&gpuvm->evict.lock);
+
list_del(&vm_bo->list.entry.gem);
drm_gem_object_put(obj);
@@ -822,6 +1285,11 @@ drm_gpuvm_bo_destroy(struct
kref *kref)
* @vm_bo: the &drm_gpuvm_bo to release the
reference of
*
* This releases a reference to @vm_bo.
+ *
+ * If the reference count drops to zero, the
&gpuvm_bo is
destroyed, which
+ * includes removing it from the GEMs gpuva list.
Hence, if
a call to this
+ * function can potentially let the reference count
to zero
the caller must
+ * hold the dma-resv or driver specific GEM gpuva lock.
*/
void
drm_gpuvm_bo_put(struct drm_gpuvm_bo *vm_bo)
@@ -831,6 +1299,12 @@ drm_gpuvm_bo_put(struct
drm_gpuvm_bo
*vm_bo)
}
EXPORT_SYMBOL_GPL(drm_gpuvm_bo_put);
+static int __must_check
+drm_gpuvm_bo_get_unless_zero(struct drm_gpuvm_bo
*vm_bo)
+{
+ return kref_get_unless_zero(&vm_bo->kref);
+}
+
static struct drm_gpuvm_bo *
__drm_gpuvm_bo_find(struct drm_gpuvm *gpuvm,
struct drm_gem_object *obj)
@@ -938,6 +1412,48 @@
drm_gpuvm_bo_obtain_prealloc(struct
drm_gpuvm_bo *__vm_bo)
}
EXPORT_SYMBOL_GPL(drm_gpuvm_bo_obtain_prealloc);
+/**
+ * drm_gpuvm_bo_extobj_add() - adds the
&drm_gpuvm_bo to its
&drm_gpuvm's
+ * extobj list
+ * @vm_bo: The &drm_gpuvm_bo to add to its
&drm_gpuvm's the
extobj list.
+ *
+ * Adds the given @vm_bo to its &drm_gpuvm's extobj
list if
not on the list
+ * already and if the corresponding &drm_gem_object
is an
external object,
+ * actually.
+ */
+void
+drm_gpuvm_bo_extobj_add(struct drm_gpuvm_bo *vm_bo)
+{
+ struct drm_gpuvm *gpuvm = vm_bo->vm;
+
+ if (drm_gpuvm_is_extobj(gpuvm, vm_bo->obj))
+ drm_gpuvm_bo_list_add(vm_bo, extobj);
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_bo_extobj_add);
+
+/**
+ * drm_gpuvm_bo_evict() - add / remove a
&drm_gem_object to
/ from a
+ * &drm_gpuvms evicted list
+ * @obj: the &drm_gem_object to add or remove
+ * @evict: indicates whether the object is evicted
+ *
+ * Adds a &drm_gem_object to or removes it from all
&drm_gpuvms evicted
+ * list containing a mapping of this &drm_gem_object.
+ */
+void
+drm_gpuvm_bo_evict(struct drm_gem_object *obj, bool
evict)
+{
+ struct drm_gpuvm_bo *vm_bo;
+
+ drm_gem_for_each_gpuvm_bo(vm_bo, obj) {
+ if (evict)
+ drm_gpuvm_bo_list_add(vm_bo,
evict);
+ else
+ drm_gpuvm_bo_list_del(vm_bo,
evict);
+ }
+}
+EXPORT_SYMBOL_GPL(drm_gpuvm_bo_evict);
+
static int
__drm_gpuva_insert(struct drm_gpuvm *gpuvm,
struct drm_gpuva *va)
diff --git a/include/drm/drm_gpuvm.h
b/include/drm/drm_gpuvm.h
index afa50b9059a2..834bb6d6617e 100644
--- a/include/drm/drm_gpuvm.h
+++ b/include/drm/drm_gpuvm.h
@@ -26,10 +26,12 @@
*/
#include <linux/list.h>
+#include <linux/dma-resv.h>
#include <linux/rbtree.h>
#include <linux/types.h>
#include <drm/drm_gem.h>
+#include <drm/drm_exec.h>
struct drm_gpuvm;
struct drm_gpuvm_bo;
@@ -259,6 +261,38 @@ struct drm_gpuvm {
* space
*/
struct dma_resv *resv;
+
+ /**
+ * @extobj: structure holding the extobj list
+ */
+ struct {
+ /**
+ * @list: &list_head storing
&drm_gpuvm_bos
serving as
+ * external object
+ */
+ struct list_head list;
+
+ /**
+ * @lock: spinlock to protect the
extobj list
+ */
+ spinlock_t lock;
+ } extobj;
+
+ /**
+ * @evict: structure holding the evict list
and evict
list lock
+ */
+ struct {
+ /**
+ * @list: &list_head storing
&drm_gpuvm_bos
currently being
+ * evicted
+ */
+ struct list_head list;
+
+ /**
+ * @lock: spinlock to protect the
evict list
+ */
+ spinlock_t lock;
+ } evict;
};
void drm_gpuvm_init(struct drm_gpuvm *gpuvm, struct
drm_device *drm,
@@ -268,6 +302,21 @@ void drm_gpuvm_init(struct
drm_gpuvm
*gpuvm, struct drm_device *drm,
const struct drm_gpuvm_ops *ops);
void drm_gpuvm_destroy(struct drm_gpuvm *gpuvm);
+/**
+ * drm_gpuvm_is_extobj() - indicates whether the given
&drm_gem_object is an
+ * external object
+ * @gpuvm: the &drm_gpuvm to check
+ * @obj: the &drm_gem_object to check
+ *
+ * Returns: true if the &drm_gem_object &dma_resv
differs
from the
+ * &drm_gpuvms &dma_resv, false otherwise
+ */
+static inline bool drm_gpuvm_is_extobj(struct drm_gpuvm
*gpuvm,
+ struct drm_gem_object
*obj)
+{
+ return obj && obj->resv != gpuvm->resv;
+}
+
static inline struct drm_gpuva *
__drm_gpuva_next(struct drm_gpuva *va)
{
@@ -346,6 +395,128 @@ __drm_gpuva_next(struct
drm_gpuva *va)
#define drm_gpuvm_for_each_va_safe(va__, next__,
gpuvm__)
\
list_for_each_entry_safe(va__, next__,
&(gpuvm__)-
rb.list, rb.entry)
+/**
+ * struct drm_gpuvm_exec - &drm_gpuvm abstraction of
&drm_exec
+ *
+ * This structure should be created on the stack as
&drm_exec should be.
+ *
+ * Optionally, @extra can be set in order to lock
additional
&drm_gem_objects.
+ */
+struct drm_gpuvm_exec {
+ /**
+ * @exec: the &drm_exec structure
+ */
+ struct drm_exec exec;
+
+ /**
+ * @vm: the &drm_gpuvm to lock its DMA
reservations
+ */
+ struct drm_gpuvm *vm;
+
+ /**
+ * @extra: Callback and corresponding private
data
for the driver to
+ * lock arbitrary additional &drm_gem_objects.
+ */
+ struct {
+ /**
+ * @fn: The driver callback to lock
additional &drm_gem_objects.
+ */
+ int (*fn)(struct drm_gpuvm_exec
*vm_exec,
+ unsigned int num_fences);
+
+ /**
+ * @priv: driver private data for the
@fn
callback
+ */
+ void *priv;
+ } extra;
+};
+
+/**
+ * drm_gpuvm_prepare_vm() - prepare the GPUVMs
common dma-
resv
+ * @gpuvm: the &drm_gpuvm
+ * @exec: the &drm_exec context
+ * @num_fences: the amount of &dma_fences to reserve
+ *
+ * Calls drm_exec_prepare_obj() for the GPUVMs dummy
&drm_gem_object.
+ *
+ * Using this function directly, it is the drivers
responsibility to call
+ * drm_exec_init() and drm_exec_fini() accordingly.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+static inline int
+drm_gpuvm_prepare_vm(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ unsigned int num_fences)
+{
+ return drm_exec_prepare_obj(exec, &gpuvm->d_obj,
num_fences);
+}
+
+int drm_gpuvm_prepare_objects(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ unsigned int num_fences);
+
+int drm_gpuvm_prepare_range(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ u64 addr, u64 range,
+ unsigned int num_fences);
+
+int drm_gpuvm_exec_lock(struct drm_gpuvm_exec *vm_exec,
+ unsigned int num_fences,
+ bool interruptible);
+
+int drm_gpuvm_exec_lock_array(struct drm_gpuvm_exec
*vm_exec,
+ struct drm_gem_object **objs,
+ unsigned int num_objs,
+ unsigned int num_fences,
+ bool interruptible);
+
+int drm_gpuvm_exec_lock_range(struct drm_gpuvm_exec
*vm_exec,
+ u64 addr, u64 range,
+ unsigned int num_fences,
+ bool interruptible);
+
+/**
+ * drm_gpuvm_lock() - lock all dma-resv of all
assoiciated
BOs
+ * @gpuvm: the &drm_gpuvm
+ *
+ * Releases all dma-resv locks of all &drm_gem_objects
previously acquired
+ * through drm_gpuvm_lock() or its variants.
+ *
+ * Returns: 0 on success, negative error code on
failure.
+ */
+static inline void
+drm_gpuvm_exec_unlock(struct drm_gpuvm_exec *vm_exec)
+{
+ drm_exec_fini(&vm_exec->exec);
+}
+
+int drm_gpuvm_validate(struct drm_gpuvm *gpuvm);
+void drm_gpuvm_resv_add_fence(struct drm_gpuvm *gpuvm,
+ struct drm_exec *exec,
+ struct dma_fence *fence,
+ enum dma_resv_usage
private_usage,
+ enum dma_resv_usage
extobj_usage);
+
+/**
+ * drm_gpuvm_exec_resv_add_fence()
+ * @vm_exec: the &drm_gpuvm_exec abstraction
+ * @fence: fence to add
+ * @private_usage: private dma-resv usage
+ * @extobj_usage: extobj dma-resv usage
+ *
+ * See drm_gpuvm_resv_add_fence().
+ */
+static inline void
+drm_gpuvm_exec_resv_add_fence(struct drm_gpuvm_exec
*vm_exec,
+ struct dma_fence *fence,
+ enum dma_resv_usage
private_usage,
+ enum dma_resv_usage
extobj_usage)
+{
+ drm_gpuvm_resv_add_fence(vm_exec->vm,
&vm_exec->exec,
fence,
+ private_usage,
extobj_usage);
+}
+
/**
* struct drm_gpuvm_bo - structure representing a
&drm_gpuvm and
* &drm_gem_object combination
@@ -398,6 +569,18 @@ struct drm_gpuvm_bo {
* gpuva list.
*/
struct list_head gem;
+
+ /**
+ * @evict: List entry to
attach to
the &drm_gpuvms
+ * extobj list.
+ */
+ struct list_head extobj;
+
+ /**
+ * @evict: List entry to
attach to
the &drm_gpuvms evict
+ * list.
+ */
+ struct list_head evict;
} entry;
} list;
};
@@ -432,6 +615,9 @@ struct drm_gpuvm_bo *
drm_gpuvm_bo_find(struct drm_gpuvm *gpuvm,
struct drm_gem_object *obj);
+void drm_gpuvm_bo_evict(struct drm_gem_object *obj,
bool
evict);
+void drm_gpuvm_bo_extobj_add(struct drm_gpuvm_bo
*vm_bo);
+
/**
* drm_gpuvm_bo_for_each_va() - iterator to walk
over a
list of &drm_gpuva
* @va__: &drm_gpuva structure to assign to in each
iteration step
@@ -837,6 +1023,17 @@ struct drm_gpuvm_ops {
* used.
*/
int (*sm_step_unmap)(struct drm_gpuva_op
*op, void
*priv);
+
+ /**
+ * @bo_validate: called from
drm_gpuvm_validate()
+ *
+ * Drivers receive this callback for every
evicted
&drm_gem_object being
+ * mapped in the corresponding &drm_gpuvm.
+ *
+ * Typically, drivers would call their driver
specific variant of
+ * ttm_bo_validate() from within this callback.
+ */
+ int (*bo_validate)(struct drm_gem_object *obj);
};
int drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm,
void *priv,
