diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0204-dpaa2-eth-Add-Tx-shaping-support.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0204-dpaa2-eth-Add-Tx-shaping-support.patch | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0204-dpaa2-eth-Add-Tx-shaping-support.patch b/target/linux/layerscape/patches-5.4/701-net-0204-dpaa2-eth-Add-Tx-shaping-support.patch new file mode 100644 index 0000000000..e1354b10a7 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0204-dpaa2-eth-Add-Tx-shaping-support.patch @@ -0,0 +1,142 @@ +From ef0cc7d01f3eeca37c6bf864903af1c0cf0a792d Mon Sep 17 00:00:00 2001 +From: Ioana Radulescu <ruxandra.radulescu@nxp.com> +Date: Fri, 5 May 2017 18:11:08 +0300 +Subject: [PATCH] dpaa2-eth: Add Tx shaping support + +Add support in sysfs for controlling DPNI Tx shaping +parameters: rate limit (in Mbps) and max burst size (in bytes). +The settings are per port. + +TODO: See how to integrate Tx shaping support using +standard Linux tools (ethtool) + +Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com> +Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com> +--- + drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 80 ++++++++++++++++++++++++ + drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h | 4 ++ + 2 files changed, 84 insertions(+) + +--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c ++++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +@@ -3771,6 +3771,83 @@ const struct dcbnl_rtnl_ops dpaa2_eth_dc + }; + #endif + ++/* SysFS support */ ++static ssize_t dpaa2_eth_show_tx_shaping(struct device *dev, ++ struct device_attribute *attr, ++ char *buf) ++{ ++ struct dpaa2_eth_priv *priv = netdev_priv(to_net_dev(dev)); ++ /* No MC API for getting the shaping config. We're stateful. */ ++ struct dpni_tx_shaping_cfg *scfg = &priv->shaping_cfg; ++ ++ return sprintf(buf, "%u %hu\n", scfg->rate_limit, scfg->max_burst_size); ++} ++ ++static ssize_t dpaa2_eth_write_tx_shaping(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, ++ size_t count) ++{ ++ int err, items; ++ struct dpaa2_eth_priv *priv = netdev_priv(to_net_dev(dev)); ++ struct dpni_tx_shaping_cfg scfg; ++ ++ items = sscanf(buf, "%u %hu", &scfg.rate_limit, &scfg.max_burst_size); ++ if (items != 2) { ++ pr_err("Expected format: \"rate_limit(Mbps) max_burst_size(bytes)\"\n"); ++ return -EINVAL; ++ } ++ /* Size restriction as per MC API documentation */ ++ if (scfg.max_burst_size > DPAA2_ETH_MAX_BURST_SIZE) { ++ pr_err("max_burst_size must be <= %d\n", ++ DPAA2_ETH_MAX_BURST_SIZE); ++ return -EINVAL; ++ } ++ ++ err = dpni_set_tx_shaping(priv->mc_io, 0, priv->mc_token, &scfg); ++ if (err) { ++ dev_err(dev, "dpni_set_tx_shaping() failed\n"); ++ return -EPERM; ++ } ++ /* If successful, save the current configuration for future inquiries */ ++ priv->shaping_cfg = scfg; ++ ++ return count; ++} ++ ++static struct device_attribute dpaa2_eth_attrs[] = { ++ __ATTR(tx_shaping, ++ 0600, ++ dpaa2_eth_show_tx_shaping, ++ dpaa2_eth_write_tx_shaping), ++}; ++ ++static void dpaa2_eth_sysfs_init(struct device *dev) ++{ ++ int i, err; ++ ++ for (i = 0; i < ARRAY_SIZE(dpaa2_eth_attrs); i++) { ++ err = device_create_file(dev, &dpaa2_eth_attrs[i]); ++ if (err) { ++ dev_err(dev, "ERROR creating sysfs file\n"); ++ goto undo; ++ } ++ } ++ return; ++ ++undo: ++ while (i > 0) ++ device_remove_file(dev, &dpaa2_eth_attrs[--i]); ++} ++ ++static void dpaa2_eth_sysfs_remove(struct device *dev) ++{ ++ int i; ++ ++ for (i = 0; i < ARRAY_SIZE(dpaa2_eth_attrs); i++) ++ device_remove_file(dev, &dpaa2_eth_attrs[i]); ++} ++ + static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev) + { + struct device *dev; +@@ -3890,6 +3967,7 @@ static int dpaa2_eth_probe(struct fsl_mc + #ifdef CONFIG_DEBUG_FS + dpaa2_dbg_add(priv); + #endif ++ dpaa2_eth_sysfs_init(&net_dev->dev); + + dev_info(dev, "Probed interface %s\n", net_dev->name); + return 0; +@@ -3937,6 +4015,8 @@ static int dpaa2_eth_remove(struct fsl_m + #ifdef CONFIG_DEBUG_FS + dpaa2_dbg_remove(priv); + #endif ++ dpaa2_eth_sysfs_remove(&net_dev->dev); ++ + unregister_netdev(net_dev); + + if (priv->do_link_poll) +--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h ++++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h +@@ -42,6 +42,9 @@ + */ + #define DPAA2_ETH_FQ_TAILDROP_THRESH (1024 * 1024) + ++/* Maximum burst size value for Tx shaping */ ++#define DPAA2_ETH_MAX_BURST_SIZE 0xF7FF ++ + /* Maximum number of Tx confirmation frames to be processed + * in a single NAPI call + */ +@@ -444,6 +447,7 @@ struct dpaa2_eth_priv { + #ifdef CONFIG_DEBUG_FS + struct dpaa2_debugfs dbg; + #endif ++ struct dpni_tx_shaping_cfg shaping_cfg; + }; + + #define DPAA2_RXH_SUPPORTED (RXH_L2DA | RXH_VLAN | RXH_L3_PROTO \ |