Merge branch 'devx-async' into k.o/for-next

Yishai Hadas says:

Enable DEVX asynchronous query commands

This series enables querying a DEVX object in an asynchronous mode.

The userspace application won't block when calling the firmware and it will be
able to get the response back once that it will be ready.

To enable the above functionality:

- DEVX asynchronous command completion FD object was introduced.
- The applicable file operations were implemented to enable using it by
  the user application.
- Query asynchronous method was added to the DEVX object, it will call the
  firmware asynchronously and manages the response on the given input FD.
- Hot unplug support was added for the FD to work properly upon
  unbind/disassociate.
- mlx5 core fence for asynchronous commands was implemented and used to
  prevent racing upon unbind/disassociate.

This branch is based on mlx5-next & v5.0-rc2 due to dependencies, from
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux

* branch 'devx-async':
  IB/mlx5: Implement DEVX hot unplug for async command FD
  IB/mlx5: Implement the file ops of DEVX async command FD
  IB/mlx5: Introduce async DEVX obj query API
  IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/include/linux/reset.h b/include/linux/reset.h
index 29af6d6b2f4b..c1901b61ca30 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -32,6 +32,8 @@ struct reset_control *devm_reset_control_array_get(struct device *dev,
 struct reset_control *of_reset_control_array_get(struct device_node *np,
 						 bool shared, bool optional);
 
+int reset_control_get_count(struct device *dev);
+
 #else
 
 static inline int reset_control_reset(struct reset_control *rstc)
@@ -97,6 +99,11 @@ of_reset_control_array_get(struct device_node *np, bool shared, bool optional)
 	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
+static inline int reset_control_get_count(struct device *dev)
+{
+	return -ENOENT;
+}
+
 #endif /* CONFIG_RESET_CONTROLLER */
 
 static inline int __must_check device_reset(struct device *dev)
@@ -138,7 +145,7 @@ __must_check reset_control_get_exclusive(struct device *dev, const char *id)
  *
  * Returns a struct reset_control or IS_ERR() condition containing errno.
  * This function is intended for use with reset-controls which are shared
- * between hardware-blocks.
+ * between hardware blocks.
  *
  * When a reset-control is shared, the behavior of reset_control_assert /
  * deassert is changed, the reset-core will keep track of a deassert_count
@@ -187,7 +194,7 @@ static inline struct reset_control *of_reset_control_get_exclusive(
 }
 
 /**
- * of_reset_control_get_shared - Lookup and obtain an shared reference
+ * of_reset_control_get_shared - Lookup and obtain a shared reference
  *                               to a reset controller.
  * @node: device to be reset by the controller
  * @id: reset line name
@@ -229,7 +236,7 @@ static inline struct reset_control *of_reset_control_get_exclusive_by_index(
 }
 
 /**
- * of_reset_control_get_shared_by_index - Lookup and obtain an shared
+ * of_reset_control_get_shared_by_index - Lookup and obtain a shared
  *                                        reference to a reset controller
  *                                        by index.
  * @node: device to be reset by the controller
@@ -322,7 +329,7 @@ devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
 
 /**
  * devm_reset_control_get_shared_by_index - resource managed
- * reset_control_get_shared
+ *                                          reset_control_get_shared
  * @dev: device to be reset by the controller
  * @index: index of the reset controller
  *