qcacmn: fast TX API and registration

This is a new FAST TX API which avoids various checks.
This API will be called when SFE tags a pkt as fast_forwarded
and vap's fast_tx flag is set.

avoid additional re-checks in the wifi TX function

CRs-Fixed: 3218650
Change-Id: Iba17ede59652a1ff2af553f57de21dc58946298e

dp/wifi3.0/dp_tx.h

@@ -1097,4 +1097,148 @@ void dp_pkt_get_timestamp(uint64_t *time)
 {
 }
 #endif
+
+#ifdef CONFIG_WLAN_SYSFS_MEM_STATS
+/**
+ * dp_update_tx_desc_stats - Update the increase or decrease in
+ * outstanding tx desc count
+ * values on pdev and soc
+ * @vdev: DP pdev handle
+ *
+ * Return: void
+ */
+static inline void
+dp_update_tx_desc_stats(struct dp_pdev *pdev)
+{
+	int32_t tx_descs_cnt =
+		qdf_atomic_read(&pdev->num_tx_outstanding);
+	if (pdev->tx_descs_max < tx_descs_cnt)
+		pdev->tx_descs_max = tx_descs_cnt;
+	qdf_mem_tx_desc_cnt_update(pdev->num_tx_outstanding,
+				   pdev->tx_descs_max);
+}
+
+#else /* CONFIG_WLAN_SYSFS_MEM_STATS */
+
+static inline void
+dp_update_tx_desc_stats(struct dp_pdev *pdev)
+{
+}
+#endif /* CONFIG_WLAN_SYSFS_MEM_STATS */
+
+#ifdef QCA_TX_LIMIT_CHECK
+/**
+ * dp_tx_limit_check - Check if allocated tx descriptors reached
+ * soc max limit and pdev max limit
+ * @vdev: DP vdev handle
+ *
+ * Return: true if allocated tx descriptors reached max configured value, else
+ * false
+ */
+static inline bool
+dp_tx_limit_check(struct dp_vdev *vdev)
+{
+	struct dp_pdev *pdev = vdev->pdev;
+	struct dp_soc *soc = pdev->soc;
+
+	if (qdf_atomic_read(&soc->num_tx_outstanding) >=
+			soc->num_tx_allowed) {
+		dp_tx_info("queued packets are more than max tx, drop the frame");
+		DP_STATS_INC(vdev, tx_i.dropped.desc_na.num, 1);
+		return true;
+	}
+
+	if (qdf_atomic_read(&pdev->num_tx_outstanding) >=
+			pdev->num_tx_allowed) {
+		dp_tx_info("queued packets are more than max tx, drop the frame");
+		DP_STATS_INC(vdev, tx_i.dropped.desc_na.num, 1);
+		DP_STATS_INC(vdev, tx_i.dropped.desc_na_exc_outstand.num, 1);
+		return true;
+	}
+	return false;
+}
+
+/**
+ * dp_tx_exception_limit_check - Check if allocated tx exception descriptors
+ * reached soc max limit
+ * @vdev: DP vdev handle
+ *
+ * Return: true if allocated tx descriptors reached max configured value, else
+ * false
+ */
+static inline bool
+dp_tx_exception_limit_check(struct dp_vdev *vdev)
+{
+	struct dp_pdev *pdev = vdev->pdev;
+	struct dp_soc *soc = pdev->soc;
+
+	if (qdf_atomic_read(&soc->num_tx_exception) >=
+			soc->num_msdu_exception_desc) {
+		dp_info("exc packets are more than max drop the exc pkt");
+		DP_STATS_INC(vdev, tx_i.dropped.exc_desc_na.num, 1);
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * dp_tx_outstanding_inc - Increment outstanding tx desc values on pdev and soc
+ * @vdev: DP pdev handle
+ *
+ * Return: void
+ */
+static inline void
+dp_tx_outstanding_inc(struct dp_pdev *pdev)
+{
+	struct dp_soc *soc = pdev->soc;
+
+	qdf_atomic_inc(&pdev->num_tx_outstanding);
+	qdf_atomic_inc(&soc->num_tx_outstanding);
+	dp_update_tx_desc_stats(pdev);
+}
+
+/**
+ * dp_tx_outstanding__dec - Decrement outstanding tx desc values on pdev and soc
+ * @vdev: DP pdev handle
+ *
+ * Return: void
+ */
+static inline void
+dp_tx_outstanding_dec(struct dp_pdev *pdev)
+{
+	struct dp_soc *soc = pdev->soc;
+
+	qdf_atomic_dec(&pdev->num_tx_outstanding);
+	qdf_atomic_dec(&soc->num_tx_outstanding);
+	dp_update_tx_desc_stats(pdev);
+}
+
+#else //QCA_TX_LIMIT_CHECK
+static inline bool
+dp_tx_limit_check(struct dp_vdev *vdev)
+{
+	return false;
+}
+
+static inline bool
+dp_tx_exception_limit_check(struct dp_vdev *vdev)
+{
+	return false;
+}
+
+static inline void
+dp_tx_outstanding_inc(struct dp_pdev *pdev)
+{
+	qdf_atomic_inc(&pdev->num_tx_outstanding);
+	dp_update_tx_desc_stats(pdev);
+}
+
+static inline void
+dp_tx_outstanding_dec(struct dp_pdev *pdev)
+{
+	qdf_atomic_dec(&pdev->num_tx_outstanding);
+	dp_update_tx_desc_stats(pdev);
+}
+#endif //QCA_TX_LIMIT_CHECK
 #endif