diff options
| author | Théo Lebrun <theo.lebrun@bootlin.com> | 2025-09-23 18:00:25 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-26 17:54:50 -0700 |
| commit | 92d4256fafd8d0a14d3aaa10452ac771bf9b597c (patch) | |
| tree | 7f95a0598cb648de2d030ae925ec4e089247e138 /drivers/net | |
| parent | fca3dc859b200ca4dcdd2124beaf3bb2ab80b0f7 (diff) | |
net: macb: move ring size computation to functions
The tx/rx ring size calculation is somewhat complex and partially hidden
behind a macro. Move that out of the {RX,TX}_RING_BYTES() macros and
macb_{alloc,free}_consistent() functions into neat separate functions.
In macb_free_consistent(), we drop the size variable and directly call
the size helpers in the arguments list. In macb_alloc_consistent(), we
keep the size variable that is used by netdev_dbg() calls.
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250923-macb-fixes-v6-3-772d655cdeb6@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 3e634049dadf..73840808ea80 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -51,14 +51,10 @@ struct sifive_fu540_macb_mgmt { #define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */ #define MIN_RX_RING_SIZE 64 #define MAX_RX_RING_SIZE 8192 -#define RX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \ - * (bp)->rx_ring_size) #define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */ #define MIN_TX_RING_SIZE 64 #define MAX_TX_RING_SIZE 4096 -#define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \ - * (bp)->tx_ring_size) /* level of occupied TX descriptors under which we wake up TX process */ #define MACB_TX_WAKEUP_THRESH(bp) (3 * (bp)->tx_ring_size / 4) @@ -2470,11 +2466,20 @@ static void macb_free_rx_buffers(struct macb *bp) } } +static unsigned int macb_tx_ring_size_per_queue(struct macb *bp) +{ + return macb_dma_desc_get_size(bp) * bp->tx_ring_size + bp->tx_bd_rd_prefetch; +} + +static unsigned int macb_rx_ring_size_per_queue(struct macb *bp) +{ + return macb_dma_desc_get_size(bp) * bp->rx_ring_size + bp->rx_bd_rd_prefetch; +} + static void macb_free_consistent(struct macb *bp) { struct macb_queue *queue; unsigned int q; - int size; if (bp->rx_ring_tieoff) { dma_free_coherent(&bp->pdev->dev, macb_dma_desc_get_size(bp), @@ -2488,14 +2493,14 @@ static void macb_free_consistent(struct macb *bp) kfree(queue->tx_skb); queue->tx_skb = NULL; if (queue->tx_ring) { - size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch; - dma_free_coherent(&bp->pdev->dev, size, + dma_free_coherent(&bp->pdev->dev, + macb_tx_ring_size_per_queue(bp), queue->tx_ring, queue->tx_ring_dma); queue->tx_ring = NULL; } if (queue->rx_ring) { - size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch; - dma_free_coherent(&bp->pdev->dev, size, + dma_free_coherent(&bp->pdev->dev, + macb_rx_ring_size_per_queue(bp), queue->rx_ring, queue->rx_ring_dma); queue->rx_ring = NULL; } @@ -2546,7 +2551,7 @@ static int macb_alloc_consistent(struct macb *bp) int size; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { - size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch; + size = macb_tx_ring_size_per_queue(bp); queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &queue->tx_ring_dma, GFP_KERNEL); @@ -2564,7 +2569,7 @@ static int macb_alloc_consistent(struct macb *bp) if (!queue->tx_skb) goto out_err; - size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch; + size = macb_rx_ring_size_per_queue(bp); queue->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &queue->rx_ring_dma, GFP_KERNEL); |