qcacmn: Add data structures for SWLM

Add the necessary data structures for the
software latency manager.

Change-Id: Ibf55f0eef7ee6602b007de39a28f09c4622bd356
CRs-Fixed: 2769004

hal/wifi3.0/hal_api.h

@@ -984,6 +984,30 @@ hal_srng_access_start_unlocked(hal_soc_handle_t hal_soc_hdl,
 	return 0;
 }
 
+/**
+ * hal_srng_try_access_start - Try to start (locked) ring access
+ *
+ * @hal_soc: Opaque HAL SOC handle
+ * @hal_ring_hdl: Ring pointer (Source or Destination ring)
+ *
+ * Return: 0 on success; error on failure
+ */
+static inline int hal_srng_try_access_start(hal_soc_handle_t hal_soc_hdl,
+					    hal_ring_handle_t hal_ring_hdl)
+{
+	struct hal_srng *srng = (struct hal_srng *)hal_ring_hdl;
+
+	if (qdf_unlikely(!hal_ring_hdl)) {
+		qdf_print("Error: Invalid hal_ring\n");
+		return -EINVAL;
+	}
+
+	if (!SRNG_TRY_LOCK(&(srng->lock)))
+		return -EINVAL;
+
+	return hal_srng_access_start_unlocked(hal_soc_hdl, hal_ring_hdl);
+}
+
 /**
  * hal_srng_access_start - Start (locked) ring access
  *

hal/wifi3.0/hal_internal.h

@@ -209,6 +209,7 @@ enum hal_srng_dir {
 #define hal_srng_lock_t qdf_spinlock_t
 #define SRNG_LOCK_INIT(_lock) qdf_spinlock_create(_lock)
 #define SRNG_LOCK(_lock) qdf_spin_lock_bh(_lock)
+#define SRNG_TRY_LOCK(_lock) qdf_spin_trylock_bh(_lock)
 #define SRNG_UNLOCK(_lock) qdf_spin_unlock_bh(_lock)
 #define SRNG_LOCK_DESTROY(_lock) qdf_spinlock_destroy(_lock)