[PATCH v4 net-next 2/5] net: ena: Make few cosmetic preparations to support large LLQ

[Shay Agroskin <shayagr@amazon.com>]

Move ena_calc_io_queue_size() implementation closer to the file's
beginning so that it can be later called from ena_device_init()
function without adding a function declaration.

Also add an empty line at some spots to separate logical blocks in
funcitons.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 133 ++++++++++---------
 1 file changed, 67 insertions(+), 66 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index d3999db7c6a2..372e33831323 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3364,6 +3364,71 @@ static const struct net_device_ops ena_netdev_ops = {
 	.ndo_xdp_xmit		= ena_xdp_xmit,
 };
 
+static void ena_calc_io_queue_size(struct ena_adapter *adapter,
+				   struct ena_com_dev_get_features_ctx *get_feat_ctx)
+{
+	struct ena_admin_feature_llq_desc *llq = &get_feat_ctx->llq;
+	struct ena_com_dev *ena_dev = adapter->ena_dev;
+	u32 tx_queue_size = ENA_DEFAULT_RING_SIZE;
+	u32 rx_queue_size = ENA_DEFAULT_RING_SIZE;
+	u32 max_tx_queue_size;
+	u32 max_rx_queue_size;
+
+	if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
+		struct ena_admin_queue_ext_feature_fields *max_queue_ext =
+			&get_feat_ctx->max_queue_ext.max_queue_ext;
+		max_rx_queue_size = min_t(u32, max_queue_ext->max_rx_cq_depth,
+					  max_queue_ext->max_rx_sq_depth);
+		max_tx_queue_size = max_queue_ext->max_tx_cq_depth;
+
+		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
+			max_tx_queue_size = min_t(u32, max_tx_queue_size,
+						  llq->max_llq_depth);
+		else
+			max_tx_queue_size = min_t(u32, max_tx_queue_size,
+						  max_queue_ext->max_tx_sq_depth);
+
+		adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
+						 max_queue_ext->max_per_packet_tx_descs);
+		adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
+						 max_queue_ext->max_per_packet_rx_descs);
+	} else {
+		struct ena_admin_queue_feature_desc *max_queues =
+			&get_feat_ctx->max_queues;
+		max_rx_queue_size = min_t(u32, max_queues->max_cq_depth,
+					  max_queues->max_sq_depth);
+		max_tx_queue_size = max_queues->max_cq_depth;
+
+		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
+			max_tx_queue_size = min_t(u32, max_tx_queue_size,
+						  llq->max_llq_depth);
+		else
+			max_tx_queue_size = min_t(u32, max_tx_queue_size,
+						  max_queues->max_sq_depth);
+
+		adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
+						 max_queues->max_packet_tx_descs);
+		adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
+						 max_queues->max_packet_rx_descs);
+	}
+
+	max_tx_queue_size = rounddown_pow_of_two(max_tx_queue_size);
+	max_rx_queue_size = rounddown_pow_of_two(max_rx_queue_size);
+
+	tx_queue_size = clamp_val(tx_queue_size, ENA_MIN_RING_SIZE,
+				  max_tx_queue_size);
+	rx_queue_size = clamp_val(rx_queue_size, ENA_MIN_RING_SIZE,
+				  max_rx_queue_size);
+
+	tx_queue_size = rounddown_pow_of_two(tx_queue_size);
+	rx_queue_size = rounddown_pow_of_two(rx_queue_size);
+
+	adapter->max_tx_ring_size  = max_tx_queue_size;
+	adapter->max_rx_ring_size = max_rx_queue_size;
+	adapter->requested_tx_ring_size = tx_queue_size;
+	adapter->requested_rx_ring_size = rx_queue_size;
+}
+
 static int ena_device_validate_params(struct ena_adapter *adapter,
 				      struct ena_com_dev_get_features_ctx *get_feat_ctx)
 {
@@ -4164,72 +4229,6 @@ static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
 	pci_release_selected_regions(pdev, release_bars);
 }
 
-
-static void ena_calc_io_queue_size(struct ena_adapter *adapter,
-				   struct ena_com_dev_get_features_ctx *get_feat_ctx)
-{
-	struct ena_admin_feature_llq_desc *llq = &get_feat_ctx->llq;
-	struct ena_com_dev *ena_dev = adapter->ena_dev;
-	u32 tx_queue_size = ENA_DEFAULT_RING_SIZE;
-	u32 rx_queue_size = ENA_DEFAULT_RING_SIZE;
-	u32 max_tx_queue_size;
-	u32 max_rx_queue_size;
-
-	if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
-		struct ena_admin_queue_ext_feature_fields *max_queue_ext =
-			&get_feat_ctx->max_queue_ext.max_queue_ext;
-		max_rx_queue_size = min_t(u32, max_queue_ext->max_rx_cq_depth,
-					  max_queue_ext->max_rx_sq_depth);
-		max_tx_queue_size = max_queue_ext->max_tx_cq_depth;
-
-		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
-			max_tx_queue_size = min_t(u32, max_tx_queue_size,
-						  llq->max_llq_depth);
-		else
-			max_tx_queue_size = min_t(u32, max_tx_queue_size,
-						  max_queue_ext->max_tx_sq_depth);
-
-		adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-						 max_queue_ext->max_per_packet_tx_descs);
-		adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-						 max_queue_ext->max_per_packet_rx_descs);
-	} else {
-		struct ena_admin_queue_feature_desc *max_queues =
-			&get_feat_ctx->max_queues;
-		max_rx_queue_size = min_t(u32, max_queues->max_cq_depth,
-					  max_queues->max_sq_depth);
-		max_tx_queue_size = max_queues->max_cq_depth;
-
-		if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
-			max_tx_queue_size = min_t(u32, max_tx_queue_size,
-						  llq->max_llq_depth);
-		else
-			max_tx_queue_size = min_t(u32, max_tx_queue_size,
-						  max_queues->max_sq_depth);
-
-		adapter->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-						 max_queues->max_packet_tx_descs);
-		adapter->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-						 max_queues->max_packet_rx_descs);
-	}
-
-	max_tx_queue_size = rounddown_pow_of_two(max_tx_queue_size);
-	max_rx_queue_size = rounddown_pow_of_two(max_rx_queue_size);
-
-	tx_queue_size = clamp_val(tx_queue_size, ENA_MIN_RING_SIZE,
-				  max_tx_queue_size);
-	rx_queue_size = clamp_val(rx_queue_size, ENA_MIN_RING_SIZE,
-				  max_rx_queue_size);
-
-	tx_queue_size = rounddown_pow_of_two(tx_queue_size);
-	rx_queue_size = rounddown_pow_of_two(rx_queue_size);
-
-	adapter->max_tx_ring_size  = max_tx_queue_size;
-	adapter->max_rx_ring_size = max_rx_queue_size;
-	adapter->requested_tx_ring_size = tx_queue_size;
-	adapter->requested_rx_ring_size = rx_queue_size;
-}
-
 /* ena_probe - Device Initialization Routine
  * @pdev: PCI device information struct
  * @ent: entry in ena_pci_tbl
@@ -4366,6 +4365,7 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 			"Failed to query interrupt moderation feature\n");
 		goto err_device_destroy;
 	}
+
 	ena_init_io_rings(adapter,
 			  0,
 			  adapter->xdp_num_queues +
@@ -4486,6 +4486,7 @@ static void __ena_shutoff(struct pci_dev *pdev, bool shutdown)
 	rtnl_lock(); /* lock released inside the below if-else block */
 	adapter->reset_reason = ENA_REGS_RESET_SHUTDOWN;
 	ena_destroy_device(adapter, true);
+
 	if (shutdown) {
 		netif_device_detach(netdev);
 		dev_close(netdev);
-- 
2.25.1