net: ena: Remove ena_calc_queue_size_ctx struct

This struct was used to pass data from callee function to its caller.
Its usage can be avoided.

Removing it results in less code without any damage to code readability.
Also it allows to consolidate ring size calculation into a single
function (ena_calc_io_queue_size()).
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/amazon/ena/ena_netdev.c

@@ -4146,10 +4146,11 @@ static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
 }
 
 
-static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
+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 = &ctx->get_feat_ctx->llq;
-	struct ena_com_dev *ena_dev = ctx->ena_dev;
+	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;
@@ -4157,7 +4158,7 @@ static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
 
 	if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
 		struct ena_admin_queue_ext_feature_fields *max_queue_ext =
-			&ctx->get_feat_ctx->max_queue_ext.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;
@@ -4169,13 +4170,13 @@ static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
 			max_tx_queue_size = min_t(u32, max_tx_queue_size,
 						  max_queue_ext->max_tx_sq_depth);
 
-		ctx->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-					     max_queue_ext->max_per_packet_tx_descs);
-		ctx->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-					     max_queue_ext->max_per_packet_rx_descs);
+		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 =
-			&ctx->get_feat_ctx->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;
@@ -4187,10 +4188,10 @@ static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
 			max_tx_queue_size = min_t(u32, max_tx_queue_size,
 						  max_queues->max_sq_depth);
 
-		ctx->max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-					     max_queues->max_packet_tx_descs);
-		ctx->max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
-					     max_queues->max_packet_rx_descs);
+		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);
@@ -4204,10 +4205,10 @@ static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
 	tx_queue_size = rounddown_pow_of_two(tx_queue_size);
 	rx_queue_size = rounddown_pow_of_two(rx_queue_size);
 
-	ctx->max_tx_queue_size = max_tx_queue_size;
-	ctx->max_rx_queue_size = max_rx_queue_size;
-	ctx->tx_queue_size = tx_queue_size;
-	ctx->rx_queue_size = 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
@@ -4222,7 +4223,6 @@ static void ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
  */
 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
-	struct ena_calc_queue_size_ctx calc_queue_ctx = {};
 	struct ena_com_dev_get_features_ctx get_feat_ctx;
 	struct ena_com_dev *ena_dev = NULL;
 	struct ena_adapter *adapter;
@@ -4307,10 +4307,6 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_device_destroy;
 	}
 
-	calc_queue_ctx.ena_dev = ena_dev;
-	calc_queue_ctx.get_feat_ctx = &get_feat_ctx;
-	calc_queue_ctx.pdev = pdev;
-
 	/* Initial TX and RX interrupt delay. Assumes 1 usec granularity.
 	 * Updated during device initialization with the real granularity
 	 */
@@ -4318,7 +4314,7 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ena_dev->intr_moder_rx_interval = ENA_INTR_INITIAL_RX_INTERVAL_USECS;
 	ena_dev->intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
 	max_num_io_queues = ena_calc_max_io_queue_num(pdev, ena_dev, &get_feat_ctx);
-	ena_calc_io_queue_size(&calc_queue_ctx);
+	ena_calc_io_queue_size(adapter, &get_feat_ctx);
 	if (unlikely(!max_num_io_queues)) {
 		rc = -EFAULT;
 		goto err_device_destroy;
@@ -4328,13 +4324,6 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	adapter->reset_reason = ENA_REGS_RESET_NORMAL;
 
-	adapter->requested_tx_ring_size = calc_queue_ctx.tx_queue_size;
-	adapter->requested_rx_ring_size = calc_queue_ctx.rx_queue_size;
-	adapter->max_tx_ring_size = calc_queue_ctx.max_tx_queue_size;
-	adapter->max_rx_ring_size = calc_queue_ctx.max_rx_queue_size;
-	adapter->max_tx_sgl_size = calc_queue_ctx.max_tx_sgl_size;
-	adapter->max_rx_sgl_size = calc_queue_ctx.max_rx_sgl_size;
-
 	adapter->num_io_queues = max_num_io_queues;
 	adapter->max_num_io_queues = max_num_io_queues;
 	adapter->last_monitored_tx_qid = 0;

drivers/net/ethernet/amazon/ena/ena_netdev.h

@@ -140,18 +140,6 @@ struct ena_napi {
 	struct dim dim;
 };
 
-struct ena_calc_queue_size_ctx {
-	struct ena_com_dev_get_features_ctx *get_feat_ctx;
-	struct ena_com_dev *ena_dev;
-	struct pci_dev *pdev;
-	u32 tx_queue_size;
-	u32 rx_queue_size;
-	u32 max_tx_queue_size;
-	u32 max_rx_queue_size;
-	u16 max_tx_sgl_size;
-	u16 max_rx_sgl_size;
-};
-
 struct ena_tx_buffer {
 	struct sk_buff *skb;
 	/* num of ena desc for this specific skb