soc: fsl: dpio: Add BP and FQ query APIs

Add FQ (Frame Queue) and BP (Buffer Pool) query APIs that
users of QBMan can invoke to see the status of the queues
and pools that they are using.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 68 insertions, 0 deletions

diff --git a/drivers/soc/fsl/dpio/dpio-service.c b/drivers/soc/fsl/dpio/dpio-service.c
index 321a92613a7e..ec0837ff039a 100644
--- a/drivers/soc/fsl/dpio/dpio-service.c
+++ b/drivers/soc/fsl/dpio/dpio-service.c
@@ -601,3 +601,71 @@ struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last)
 	return ret;
 }
 EXPORT_SYMBOL_GPL(dpaa2_io_store_next);
+
+/**
+ * dpaa2_io_query_fq_count() - Get the frame and byte count for a given fq.
+ * @d: the given DPIO object.
+ * @fqid: the id of frame queue to be queried.
+ * @fcnt: the queried frame count.
+ * @bcnt: the queried byte count.
+ *
+ * Knowing the FQ count at run-time can be useful in debugging situations.
+ * The instantaneous frame- and byte-count are hereby returned.
+ *
+ * Return 0 for a successful query, and negative error code if query fails.
+ */
+int dpaa2_io_query_fq_count(struct dpaa2_io *d, u32 fqid,
+			    u32 *fcnt, u32 *bcnt)
+{
+	struct qbman_fq_query_np_rslt state;
+	struct qbman_swp *swp;
+	unsigned long irqflags;
+	int ret;
+
+	d = service_select(d);
+	if (!d)
+		return -ENODEV;
+
+	swp = d->swp;
+	spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags);
+	ret = qbman_fq_query_state(swp, fqid, &state);
+	spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags);
+	if (ret)
+		return ret;
+	*fcnt = qbman_fq_state_frame_count(&state);
+	*bcnt = qbman_fq_state_byte_count(&state);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dpaa2_io_query_fq_count);
+
+/**
+ * dpaa2_io_query_bp_count() - Query the number of buffers currently in a
+ * buffer pool.
+ * @d: the given DPIO object.
+ * @bpid: the index of buffer pool to be queried.
+ * @num: the queried number of buffers in the buffer pool.
+ *
+ * Return 0 for a successful query, and negative error code if query fails.
+ */
+int dpaa2_io_query_bp_count(struct dpaa2_io *d, u16 bpid, u32 *num)
+{
+	struct qbman_bp_query_rslt state;
+	struct qbman_swp *swp;
+	unsigned long irqflags;
+	int ret;
+
+	d = service_select(d);
+	if (!d)
+		return -ENODEV;
+
+	swp = d->swp;
+	spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags);
+	ret = qbman_bp_query(swp, bpid, &state);
+	spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags);
+	if (ret)
+		return ret;
+	*num = qbman_bp_info_num_free_bufs(&state);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dpaa2_io_query_bp_count);