sfc: Update and improve kernel-doc for efx_mcdi_state & efx_mcdi_iface

Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/mcdi.h

@@ -11,14 +11,14 @@
 #define EFX_MCDI_H
 
 /**
- * enum efx_mcdi_state
+ * enum efx_mcdi_state - MCDI request handling state
  * @MCDI_STATE_QUIESCENT: No pending MCDI requests. If the caller holds the
- *	mcdi_lock then they are able to move to MCDI_STATE_RUNNING
+ *	mcdi @iface_lock then they are able to move to %MCDI_STATE_RUNNING
  * @MCDI_STATE_RUNNING: There is an MCDI request pending. Only the thread that
  *	moved into this state is allowed to move out of it.
  * @MCDI_STATE_COMPLETED: An MCDI request has completed, but the owning thread
  *	has not yet consumed the result. For all other threads, equivalent to
- *	MCDI_STATE_RUNNING.
+ *	%MCDI_STATE_RUNNING.
  */
 enum efx_mcdi_state {
 	MCDI_STATE_QUIESCENT,
@@ -32,25 +32,23 @@ enum efx_mcdi_mode {
 };
 
 /**
- * struct efx_mcdi_iface
- * @state: Interface state. Waited for by mcdi_wq.
- * @wq: Wait queue for threads waiting for state != STATE_RUNNING
- * @iface_lock: Protects @credits, @seqno, @resprc, @resplen
+ * struct efx_mcdi_iface - MCDI protocol context
+ * @state: Request handling state. Waited for by @wq.
  * @mode: Poll for mcdi completion, or wait for an mcdi_event.
- *	Serialised by @lock
+ * @wq: Wait queue for threads waiting for @state != %MCDI_STATE_RUNNING
+ * @iface_lock: Serialises access to all the following fields
  * @seqno: The next sequence number to use for mcdi requests.
- *	Serialised by @lock
  * @credits: Number of spurious MCDI completion events allowed before we
- *	trigger a fatal error. Protected by @lock
+ *     trigger a fatal error
  * @resprc: Response error/success code (Linux numbering)
  * @resp_hdr_len: Response header length
  * @resp_data_len: Response data (SDU or error) length
  */
 struct efx_mcdi_iface {
 	atomic_t state;
+	enum efx_mcdi_mode mode;
 	wait_queue_head_t wq;
 	spinlock_t iface_lock;
-	enum efx_mcdi_mode mode;
 	unsigned int credits;
 	unsigned int seqno;
 	int resprc;