[Intel-wired-lan] [PATCH net-next v2 3/3] i40e: introduce new dump desc xdp command

[Ciara Loftus <ciara.loftus@intel.com>]

Interfaces already exist for dumping rx and tx descriptor information.
Introduce another for doing the same for xdp descriptors.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
---
v1 -> v2:
 - Fix variable name in description of dump_desc function

 .../net/ethernet/intel/i40e/i40e_debugfs.c    | 59 +++++++++++++++----
 1 file changed, 48 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 1c8285fce33f..0afae8e5a3cc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -10,6 +10,12 @@
 
 static struct dentry *i40e_dbg_root;
 
+enum ring_type {
+	RING_TYPE_RX,
+	RING_TYPE_TX,
+	RING_TYPE_XDP
+};
+
 /**
  * i40e_dbg_find_vsi - searches for the vsi with the given seid
  * @pf: the PF structure to search for the vsi
@@ -530,11 +536,12 @@ static void i40e_dbg_dump_aq_desc(struct i40e_pf *pf)
  * @ring_id: ring id entered by user
  * @desc_n: descriptor number entered by user
  * @pf: the i40e_pf created in command write
- * @is_rx_ring: true if rx, false if tx
+ * @type: enum describing whether ring is RX, TX or XDP
  **/
 static void i40e_dbg_dump_desc(int cnt, int vsi_seid, int ring_id, int desc_n,
-			       struct i40e_pf *pf, bool is_rx_ring)
+			       struct i40e_pf *pf, enum ring_type type)
 {
+	bool is_rx_ring = type == RING_TYPE_RX;
 	struct i40e_tx_desc *txd;
 	union i40e_rx_desc *rxd;
 	struct i40e_ring *ring;
@@ -546,6 +553,10 @@ static void i40e_dbg_dump_desc(int cnt, int vsi_seid, int ring_id, int desc_n,
 		dev_info(&pf->pdev->dev, "vsi %d not found\n", vsi_seid);
 		return;
 	}
+	if (type == RING_TYPE_XDP && !i40e_enabled_xdp_vsi(vsi)) {
+		dev_info(&pf->pdev->dev, "xdp not enabled on vsi %d\n", vsi_seid);
+		return;
+	}
 	if (ring_id >= vsi->num_queue_pairs || ring_id < 0) {
 		dev_info(&pf->pdev->dev, "ring %d not found\n", ring_id);
 		return;
@@ -557,15 +568,32 @@ static void i40e_dbg_dump_desc(int cnt, int vsi_seid, int ring_id, int desc_n,
 		return;
 	}
 
-	ring = kmemdup(is_rx_ring
-		       ? vsi->rx_rings[ring_id] : vsi->tx_rings[ring_id],
-		       sizeof(*ring), GFP_KERNEL);
+	switch (type) {
+	case RING_TYPE_RX:
+		ring = kmemdup(vsi->rx_rings[ring_id], sizeof(*ring), GFP_KERNEL);
+		break;
+	case RING_TYPE_TX:
+		ring = kmemdup(vsi->tx_rings[ring_id], sizeof(*ring), GFP_KERNEL);
+		break;
+	case RING_TYPE_XDP:
+		ring = kmemdup(vsi->xdp_rings[ring_id], sizeof(*ring), GFP_KERNEL);
+		break;
+	}
 	if (!ring)
 		return;
 
 	if (cnt == 2) {
-		dev_info(&pf->pdev->dev, "vsi = %02i %s ring = %02i\n",
-			 vsi_seid, is_rx_ring ? "rx" : "tx", ring_id);
+		switch (type) {
+		case RING_TYPE_RX:
+			dev_info(&pf->pdev->dev, "vsi = %02i rx ring = %02i\n", vsi_seid, ring_id);
+			break;
+		case RING_TYPE_TX:
+			dev_info(&pf->pdev->dev, "vsi = %02i tx ring = %02i\n", vsi_seid, ring_id);
+			break;
+		case RING_TYPE_XDP:
+			dev_info(&pf->pdev->dev, "vsi = %02i xdp ring = %02i\n", vsi_seid, ring_id);
+			break;
+		}
 		for (i = 0; i < ring->count; i++) {
 			if (!is_rx_ring) {
 				txd = I40E_TX_DESC(ring, i);
@@ -603,7 +631,7 @@ static void i40e_dbg_dump_desc(int cnt, int vsi_seid, int ring_id, int desc_n,
 				 rxd->read.rsvd1, rxd->read.rsvd2);
 		}
 	} else {
-		dev_info(&pf->pdev->dev, "dump desc rx/tx <vsi_seid> <ring_id> [<desc_n>]\n");
+		dev_info(&pf->pdev->dev, "dump desc rx/tx/xdp <vsi_seid> <ring_id> [<desc_n>]\n");
 	}
 
 out:
@@ -961,13 +989,19 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 				cnt = sscanf(&cmd_buf[12], "%i %i %i",
 					     &vsi_seid, &ring_id, &desc_n);
 				i40e_dbg_dump_desc(cnt, vsi_seid, ring_id,
-						   desc_n, pf, true);
+						   desc_n, pf, RING_TYPE_RX);
 			} else if (strncmp(&cmd_buf[10], "tx", 2)
 					== 0) {
 				cnt = sscanf(&cmd_buf[12], "%i %i %i",
 					     &vsi_seid, &ring_id, &desc_n);
 				i40e_dbg_dump_desc(cnt, vsi_seid, ring_id,
-						   desc_n, pf, false);
+						   desc_n, pf, RING_TYPE_TX);
+			} else if (strncmp(&cmd_buf[10], "xdp", 3)
+					== 0) {
+				cnt = sscanf(&cmd_buf[13], "%i %i %i",
+					     &vsi_seid, &ring_id, &desc_n);
+				i40e_dbg_dump_desc(cnt, vsi_seid, ring_id,
+						   desc_n, pf, RING_TYPE_XDP);
 			} else if (strncmp(&cmd_buf[10], "aq", 2) == 0) {
 				i40e_dbg_dump_aq_desc(pf);
 			} else {
@@ -975,6 +1009,8 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 					 "dump desc tx <vsi_seid> <ring_id> [<desc_n>]\n");
 				dev_info(&pf->pdev->dev,
 					 "dump desc rx <vsi_seid> <ring_id> [<desc_n>]\n");
+				dev_info(&pf->pdev->dev,
+					 "dump desc xdp <vsi_seid> <ring_id> [<desc_n>]\n");
 				dev_info(&pf->pdev->dev, "dump desc aq\n");
 			}
 		} else if (strncmp(&cmd_buf[5], "reset stats", 11) == 0) {
@@ -1145,7 +1181,7 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 			buff = NULL;
 		} else {
 			dev_info(&pf->pdev->dev,
-				 "dump desc tx <vsi_seid> <ring_id> [<desc_n>], dump desc rx <vsi_seid> <ring_id> [<desc_n>],\n");
+				 "dump desc tx <vsi_seid> <ring_id> [<desc_n>], dump desc rx <vsi_seid> <ring_id> [<desc_n>], dump desc xdp <vsi_seid> <ring_id> [<desc_n>],\n");
 			dev_info(&pf->pdev->dev, "dump switch\n");
 			dev_info(&pf->pdev->dev, "dump vsi [seid]\n");
 			dev_info(&pf->pdev->dev, "dump reset stats\n");
@@ -1561,6 +1597,7 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 		dev_info(&pf->pdev->dev, "  dump vsi [seid]\n");
 		dev_info(&pf->pdev->dev, "  dump desc tx <vsi_seid> <ring_id> [<desc_n>]\n");
 		dev_info(&pf->pdev->dev, "  dump desc rx <vsi_seid> <ring_id> [<desc_n>]\n");
+		dev_info(&pf->pdev->dev, "  dump desc xdp <vsi_seid> <ring_id> [<desc_n>]\n");
 		dev_info(&pf->pdev->dev, "  dump desc aq\n");
 		dev_info(&pf->pdev->dev, "  dump reset stats\n");
 		dev_info(&pf->pdev->dev, "  dump debug fwdata <cluster_id> <table_id> <index>\n");
-- 
2.17.1