netdev - [PATCH net-next v3 1/2] net: macb: move the Tx and Rx buffer initialization into a function

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 13 Nov 2019 10:00:05 +0100
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     davem@...emloft.net, linux@...linux.org.uk
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>, andrew@...n.ch,
        alexandre.belloni@...tlin.com, nicolas.ferre@...rochip.com,
        netdev@...r.kernel.org, thomas.petazzoni@...tlin.com,
        mparab@...ence.com, piotrs@...ence.com, dkangude@...ence.com,
        ewanm@...ence.com, arthurm@...ence.com, stevenh@...ence.com
Subject: [PATCH net-next v3 1/2] net: macb: move the Tx and Rx buffer initialization into a function

This patch moves the Tx and Rx buffer initialization into its own
function. This does not modify the behaviour of the driver and will be
helpful to convert the driver to phylink.

Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 39 +++++++++++++++---------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index b884cf7f339b..1b3c8d678116 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -388,6 +388,27 @@ static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
 	return status;
 }
 
+static void macb_init_buffers(struct macb *bp)
+{
+	struct macb_queue *queue;
+	unsigned int q;
+
+	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+		queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+		if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+			queue_writel(queue, RBQPH,
+				     upper_32_bits(queue->rx_ring_dma));
+#endif
+		queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+		if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+			queue_writel(queue, TBQPH,
+				     upper_32_bits(queue->tx_ring_dma));
+#endif
+	}
+}
+
 /**
  * macb_set_tx_clk() - Set a clock to a new frequency
  * @clk		Pointer to the clock to change
@@ -1314,26 +1335,14 @@ static void macb_hresp_error_task(unsigned long data)
 	bp->macbgem_ops.mog_init_rings(bp);
 
 	/* Initialize TX and RX buffers */
-	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
-		queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
-#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
-		if (bp->hw_dma_cap & HW_DMA_CAP_64B)
-			queue_writel(queue, RBQPH,
-				     upper_32_bits(queue->rx_ring_dma));
-#endif
-		queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
-#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
-		if (bp->hw_dma_cap & HW_DMA_CAP_64B)
-			queue_writel(queue, TBQPH,
-				     upper_32_bits(queue->tx_ring_dma));
-#endif
+	macb_init_buffers(bp);
 
-		/* Enable interrupts */
+	/* Enable interrupts */
+	for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
 		queue_writel(queue, IER,
 			     bp->rx_intr_mask |
 			     MACB_TX_INT_FLAGS |
 			     MACB_BIT(HRESP));
-	}
 
 	ctrl |= MACB_BIT(RE) | MACB_BIT(TE);
 	macb_writel(bp, NCR, ctrl);
-- 
2.23.0