Commit 0155ae6e authored by Robert Hancock's avatar Robert Hancock Committed by David S. Miller

net: axienet: don't set IRQ timer when IRQ delay not used

When the RX or TX coalesce count is set to 1, there's no point in
setting the delay timer value since an interrupt will already be raised
on every packet, and the delay interrupt just causes extra pointless
interrupts.
Signed-off-by: default avatarRobert Hancock <robert.hancock@calian.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 84b9ccc0
......@@ -236,14 +236,24 @@ static void axienet_dma_start(struct axienet_local *lp)
/* Start updating the Rx channel control register */
rx_cr = (lp->coalesce_count_rx << XAXIDMA_COALESCE_SHIFT) |
(XAXIDMA_DFT_RX_WAITBOUND << XAXIDMA_DELAY_SHIFT) |
XAXIDMA_IRQ_ALL_MASK;
XAXIDMA_IRQ_IOC_MASK | XAXIDMA_IRQ_ERROR_MASK;
/* Only set interrupt delay timer if not generating an interrupt on
* the first RX packet. Otherwise leave at 0 to disable delay interrupt.
*/
if (lp->coalesce_count_rx > 1)
rx_cr |= (XAXIDMA_DFT_RX_WAITBOUND << XAXIDMA_DELAY_SHIFT) |
XAXIDMA_IRQ_DELAY_MASK;
axienet_dma_out32(lp, XAXIDMA_RX_CR_OFFSET, rx_cr);
/* Start updating the Tx channel control register */
tx_cr = (lp->coalesce_count_tx << XAXIDMA_COALESCE_SHIFT) |
(XAXIDMA_DFT_TX_WAITBOUND << XAXIDMA_DELAY_SHIFT) |
XAXIDMA_IRQ_ALL_MASK;
XAXIDMA_IRQ_IOC_MASK | XAXIDMA_IRQ_ERROR_MASK;
/* Only set interrupt delay timer if not generating an interrupt on
* the first TX packet. Otherwise leave at 0 to disable delay interrupt.
*/
if (lp->coalesce_count_tx > 1)
tx_cr |= (XAXIDMA_DFT_TX_WAITBOUND << XAXIDMA_DELAY_SHIFT) |
XAXIDMA_IRQ_DELAY_MASK;
axienet_dma_out32(lp, XAXIDMA_TX_CR_OFFSET, tx_cr);
/* Populate the tail pointer and bring the Rx Axi DMA engine out of
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment