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authorEsben Haabendal <esben@geanix.com>2020-02-28 10:57:41 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-01 08:30:43 +0300
commit227d4617c4234fd652c1b56194f2707bbd44ac22 (patch)
tree0d9bea334e5b73e1f401ed6ce0f6ed1a7d8fe27f /drivers/net/ethernet/xilinx
parentf7b261bfc35eab024898457dcacf8d5a28bead54 (diff)
downloadlinux-227d4617c4234fd652c1b56194f2707bbd44ac22.tar.xz
net: ll_temac: Add ethtool support for coalesce parameters
Please note that the delays are calculated based on typical parameters. But as TEMAC is an HDL IP, designs may vary, and future work might be needed to make this calculation configurable. Signed-off-by: Esben Haabendal <esben@geanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/xilinx')
-rw-r--r--drivers/net/ethernet/xilinx/ll_temac.h5
-rw-r--r--drivers/net/ethernet/xilinx/ll_temac_main.c98
2 files changed, 81 insertions, 22 deletions
diff --git a/drivers/net/ethernet/xilinx/ll_temac.h b/drivers/net/ethernet/xilinx/ll_temac.h
index 8777ec6e21c8..4a73127e10a6 100644
--- a/drivers/net/ethernet/xilinx/ll_temac.h
+++ b/drivers/net/ethernet/xilinx/ll_temac.h
@@ -379,9 +379,10 @@ struct temac_local {
int rx_bd_tail;
/* DMA channel control setup */
- u32 tx_chnl_ctrl;
- u32 rx_chnl_ctrl;
+ u8 coalesce_count_tx;
+ u8 coalesce_delay_tx;
u8 coalesce_count_rx;
+ u8 coalesce_delay_rx;
struct delayed_work restart_work;
};
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 5735acb44b57..dc022cd5bc42 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -379,11 +379,13 @@ static int temac_dma_bd_init(struct net_device *ndev)
}
/* Configure DMA channel (irq setup) */
- lp->dma_out(lp, TX_CHNL_CTRL, lp->tx_chnl_ctrl |
+ lp->dma_out(lp, TX_CHNL_CTRL,
+ lp->coalesce_delay_tx << 24 | lp->coalesce_count_tx << 16 |
0x00000400 | // Use 1 Bit Wide Counters. Currently Not Used!
CHNL_CTRL_IRQ_EN | CHNL_CTRL_IRQ_ERR_EN |
CHNL_CTRL_IRQ_DLY_EN | CHNL_CTRL_IRQ_COAL_EN);
- lp->dma_out(lp, RX_CHNL_CTRL, lp->rx_chnl_ctrl |
+ lp->dma_out(lp, RX_CHNL_CTRL,
+ lp->coalesce_delay_rx << 24 | lp->coalesce_count_rx << 16 |
CHNL_CTRL_IRQ_IOE |
CHNL_CTRL_IRQ_EN | CHNL_CTRL_IRQ_ERR_EN |
CHNL_CTRL_IRQ_DLY_EN | CHNL_CTRL_IRQ_COAL_EN);
@@ -1289,6 +1291,65 @@ static int ll_temac_ethtools_set_ringparam(struct net_device *ndev,
return 0;
}
+static int ll_temac_ethtools_get_coalesce(struct net_device *ndev,
+ struct ethtool_coalesce *ec)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+
+ ec->rx_max_coalesced_frames = lp->coalesce_count_rx;
+ ec->tx_max_coalesced_frames = lp->coalesce_count_tx;
+ ec->rx_coalesce_usecs = (lp->coalesce_delay_rx * 512) / 100;
+ ec->tx_coalesce_usecs = (lp->coalesce_delay_tx * 512) / 100;
+ return 0;
+}
+
+static int ll_temac_ethtools_set_coalesce(struct net_device *ndev,
+ struct ethtool_coalesce *ec)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+
+ if (netif_running(ndev)) {
+ netdev_err(ndev,
+ "Please stop netif before applying configuration\n");
+ return -EFAULT;
+ }
+
+ if (ec->rx_coalesce_usecs_irq ||
+ ec->rx_max_coalesced_frames_irq ||
+ ec->tx_coalesce_usecs_irq ||
+ ec->tx_max_coalesced_frames_irq ||
+ ec->stats_block_coalesce_usecs ||
+ ec->use_adaptive_rx_coalesce ||
+ ec->use_adaptive_tx_coalesce ||
+ ec->pkt_rate_low ||
+ ec->rx_coalesce_usecs_low ||
+ ec->rx_max_coalesced_frames_low ||
+ ec->tx_coalesce_usecs_low ||
+ ec->tx_max_coalesced_frames_low ||
+ ec->pkt_rate_high ||
+ ec->rx_coalesce_usecs_high ||
+ ec->rx_max_coalesced_frames_high ||
+ ec->tx_coalesce_usecs_high ||
+ ec->tx_max_coalesced_frames_high ||
+ ec->rate_sample_interval)
+ return -EOPNOTSUPP;
+ if (ec->rx_max_coalesced_frames)
+ lp->coalesce_count_rx = ec->rx_max_coalesced_frames;
+ if (ec->tx_max_coalesced_frames)
+ lp->coalesce_count_tx = ec->tx_max_coalesced_frames;
+ /* With typical LocalLink clock speed of 200 MHz and
+ * C_PRESCALAR=1023, each delay count corresponds to 5.12 us.
+ */
+ if (ec->rx_coalesce_usecs)
+ lp->coalesce_delay_rx =
+ min(255U, (ec->rx_coalesce_usecs * 100) / 512);
+ if (ec->tx_coalesce_usecs)
+ lp->coalesce_delay_tx =
+ min(255U, (ec->tx_coalesce_usecs * 100) / 512);
+
+ return 0;
+}
+
static const struct ethtool_ops temac_ethtool_ops = {
.nway_reset = phy_ethtool_nway_reset,
.get_link = ethtool_op_get_link,
@@ -1297,6 +1358,8 @@ static const struct ethtool_ops temac_ethtool_ops = {
.set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_ringparam = ll_temac_ethtools_get_ringparam,
.set_ringparam = ll_temac_ethtools_set_ringparam,
+ .get_coalesce = ll_temac_ethtools_get_coalesce,
+ .set_coalesce = ll_temac_ethtools_set_coalesce,
};
static int temac_probe(struct platform_device *pdev)
@@ -1406,6 +1469,14 @@ static int temac_probe(struct platform_device *pdev)
/* Can checksum TCP/UDP over IPv4. */
ndev->features |= NETIF_F_IP_CSUM;
+ /* Defaults for IRQ delay/coalescing setup. These are
+ * configuration values, so does not belong in device-tree.
+ */
+ lp->coalesce_delay_tx = 0x10;
+ lp->coalesce_count_tx = 0x22;
+ lp->coalesce_delay_rx = 0xff;
+ lp->coalesce_count_rx = 0x07;
+
/* Setup LocalLink DMA */
if (temac_np) {
/* Find the DMA node, map the DMA registers, and
@@ -1444,14 +1515,6 @@ static int temac_probe(struct platform_device *pdev)
lp->rx_irq = irq_of_parse_and_map(dma_np, 0);
lp->tx_irq = irq_of_parse_and_map(dma_np, 1);
- /* Use defaults for IRQ delay/coalescing setup. These
- * are configuration values, so does not belong in
- * device-tree.
- */
- lp->tx_chnl_ctrl = 0x10220000;
- lp->rx_chnl_ctrl = 0xff070000;
- lp->coalesce_count_rx = 0x07;
-
/* Finished with the DMA node; drop the reference */
of_node_put(dma_np);
} else if (pdata) {
@@ -1477,18 +1540,13 @@ static int temac_probe(struct platform_device *pdev)
lp->tx_irq = platform_get_irq(pdev, 1);
/* IRQ delay/coalescing setup */
- if (pdata->tx_irq_timeout || pdata->tx_irq_count)
- lp->tx_chnl_ctrl = (pdata->tx_irq_timeout << 24) |
- (pdata->tx_irq_count << 16);
- else
- lp->tx_chnl_ctrl = 0x10220000;
+ if (pdata->tx_irq_timeout || pdata->tx_irq_count) {
+ lp->coalesce_delay_tx = pdata->tx_irq_timeout;
+ lp->coalesce_count_tx = pdata->tx_irq_count;
+ }
if (pdata->rx_irq_timeout || pdata->rx_irq_count) {
- lp->rx_chnl_ctrl = (pdata->rx_irq_timeout << 24) |
- (pdata->rx_irq_count << 16);
+ lp->coalesce_delay_rx = pdata->rx_irq_timeout;
lp->coalesce_count_rx = pdata->rx_irq_count;
- } else {
- lp->rx_chnl_ctrl = 0xff070000;
- lp->coalesce_count_rx = 0x07;
}
}