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Message-ID: <AM6PR04MB40080865F823C7C57716818FEC640@AM6PR04MB4008.eurprd04.prod.outlook.com>
Date: Thu, 7 Jun 2018 08:24:01 +0000
From: Madalin-cristian Bucur <madalin.bucur@....com>
To: "Y.b. Lu" <yangbo.lu@....com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Richard Cochran <richardcochran@...il.com>,
Rob Herring <robh+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
"David S . Miller" <davem@...emloft.net>
CC: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Y.b. Lu" <yangbo.lu@....com>
Subject: RE: [v2, 09/10] dpaa_eth: add support for hardware timestamping
> -----Original Message-----
> From: Yangbo Lu [mailto:yangbo.lu@....com]
> Sent: Thursday, June 7, 2018 6:23 AM
> Subject: [v2, 09/10] dpaa_eth: add support for hardware timestamping
>
> This patch is to add hardware timestamping support
> for dpaa_eth. On Rx, timestamping is enabled for
> all frames. On Tx, we only instruct the hardware
> to timestamp the frames marked accordingly by the
> stack.
>
> Signed-off-by: Yangbo Lu <yangbo.lu@....com>
> ---
> Changes for v2:
> - Removed ifdef for timestamp code.
> - Minor fixes for code style.
> ---
> drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 101
> ++++++++++++++++++++++-
> drivers/net/ethernet/freescale/dpaa/dpaa_eth.h | 3 +
> 2 files changed, 99 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> index fd43f98..bd589ac 100644
> --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
> @@ -1168,7 +1168,7 @@ static int dpaa_eth_init_tx_port(struct fman_port
> *port, struct dpaa_fq *errq,
> buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
> buf_prefix_content.pass_prs_result = true;
> buf_prefix_content.pass_hash_result = true;
> - buf_prefix_content.pass_time_stamp = false;
> + buf_prefix_content.pass_time_stamp = true;
> buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;
>
> params.specific_params.non_rx_params.err_fqid = errq->fqid;
> @@ -1210,7 +1210,7 @@ static int dpaa_eth_init_rx_port(struct fman_port
> *port, struct dpaa_bp **bps,
> buf_prefix_content.priv_data_size = buf_layout->priv_data_size;
> buf_prefix_content.pass_prs_result = true;
> buf_prefix_content.pass_hash_result = true;
> - buf_prefix_content.pass_time_stamp = false;
> + buf_prefix_content.pass_time_stamp = true;
> buf_prefix_content.data_align = DPAA_FD_DATA_ALIGNMENT;
>
> rx_p = ¶ms.specific_params.rx_params;
> @@ -1592,6 +1592,16 @@ static int dpaa_eth_refill_bpools(struct dpaa_priv
> *priv)
> return 0;
> }
>
> +static int dpaa_get_tstamp_ns(struct net_device *net_dev, u64 *ns,
> + struct fman_port *port, const void *data)
> +{
> + if (!fman_port_get_tstamp_field(port, data, ns)) {
> + be64_to_cpus(ns);
Please move this endianness conversion in the fman API.
> + return 0;
> + }
> + return -EINVAL;
> +}
> +
> /* Cleanup function for outgoing frame descriptors that were built on Tx
> path,
> * either contiguous frames or scatter/gather ones.
> * Skb freeing is not handled here.
> @@ -1607,14 +1617,29 @@ static int dpaa_eth_refill_bpools(struct dpaa_priv
> *priv)
> {
> const enum dma_data_direction dma_dir = DMA_TO_DEVICE;
> struct device *dev = priv->net_dev->dev.parent;
> + struct skb_shared_hwtstamps shhwtstamps;
> dma_addr_t addr = qm_fd_addr(fd);
> const struct qm_sg_entry *sgt;
> struct sk_buff **skbh, *skb;
> int nr_frags, i;
> + u64 ns;
>
> skbh = (struct sk_buff **)phys_to_virt(addr);
> skb = *skbh;
>
> + if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags &
> SKBTX_HW_TSTAMP) {
> + memset(&shhwtstamps, 0, sizeof(shhwtstamps));
> +
> + if (!dpaa_get_tstamp_ns(priv->net_dev, &ns,
> + priv->mac_dev->port[TX],
> + (void *)skbh)) {
> + shhwtstamps.hwtstamp = ns_to_ktime(ns);
> + skb_tstamp_tx(skb, &shhwtstamps);
> + } else {
> + dev_warn(dev, "dpaa_get_tstamp_ns failed!\n");
> + }
> + }
> +
> if (unlikely(qm_fd_get_format(fd) == qm_fd_sg)) {
> nr_frags = skb_shinfo(skb)->nr_frags;
> dma_unmap_single(dev, addr, qm_fd_get_offset(fd) +
> @@ -2086,6 +2111,11 @@ static int dpaa_start_xmit(struct sk_buff *skb,
> struct net_device *net_dev)
> if (unlikely(err < 0))
> goto skb_to_fd_failed;
>
> + if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags &
> SKBTX_HW_TSTAMP) {
> + fd.cmd |= FM_FD_CMD_UPD;
The fd.cmd field is big endian, please use this:
+ fd.cmd |= cpu_to_be32(FM_FD_CMD_UPD);
> + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
> + }
> +
> if (likely(dpaa_xmit(priv, percpu_stats, queue_mapping, &fd) == 0))
> return NETDEV_TX_OK;
>
> @@ -2227,6 +2257,7 @@ static enum qman_cb_dqrr_result
> rx_default_dqrr(struct qman_portal *portal,
> struct qman_fq *fq,
> const struct qm_dqrr_entry
> *dq)
> {
> + struct skb_shared_hwtstamps *shhwtstamps;
> struct rtnl_link_stats64 *percpu_stats;
> struct dpaa_percpu_priv *percpu_priv;
> const struct qm_fd *fd = &dq->fd;
> @@ -2240,6 +2271,7 @@ static enum qman_cb_dqrr_result
> rx_default_dqrr(struct qman_portal *portal,
> struct sk_buff *skb;
> int *count_ptr;
> void *vaddr;
> + u64 ns;
>
> fd_status = be32_to_cpu(fd->status);
> fd_format = qm_fd_get_format(fd);
> @@ -2304,6 +2336,18 @@ static enum qman_cb_dqrr_result
> rx_default_dqrr(struct qman_portal *portal,
> if (!skb)
> return qman_cb_dqrr_consume;
>
> + if (priv->rx_tstamp) {
> + shhwtstamps = skb_hwtstamps(skb);
> + memset(shhwtstamps, 0, sizeof(*shhwtstamps));
> +
> + if (!dpaa_get_tstamp_ns(priv->net_dev, &ns,
> + priv->mac_dev->port[RX],
> + vaddr))
> + shhwtstamps->hwtstamp = ns_to_ktime(ns);
> + else
> + dev_warn(net_dev->dev.parent,
> "dpaa_get_tstamp_ns failed!\n");
> + }
> +
> skb->protocol = eth_type_trans(skb, net_dev);
>
> if (net_dev->features & NETIF_F_RXHASH && priv->keygen_in_use
> &&
> @@ -2523,11 +2567,58 @@ static int dpaa_eth_stop(struct net_device
> *net_dev)
> return err;
> }
>
> +static int dpaa_ts_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
> +{
> + struct dpaa_priv *priv = netdev_priv(dev);
> + struct hwtstamp_config config;
> +
> + if (copy_from_user(&config, rq->ifr_data, sizeof(config)))
> + return -EFAULT;
> +
> + switch (config.tx_type) {
> + case HWTSTAMP_TX_OFF:
> + /* Couldn't disable rx/tx timestamping separately.
> + * Do nothing here.
> + */
> + priv->tx_tstamp = false;
> + break;
> + case HWTSTAMP_TX_ON:
> + priv->mac_dev->set_tstamp(priv->mac_dev->fman_mac,
> true);
> + priv->tx_tstamp = true;
> + break;
> + default:
> + return -ERANGE;
> + }
> +
> + if (config.rx_filter == HWTSTAMP_FILTER_NONE) {
> + /* Couldn't disable rx/tx timestamping separately.
> + * Do nothing here.
> + */
> + priv->rx_tstamp = false;
> + } else {
> + priv->mac_dev->set_tstamp(priv->mac_dev->fman_mac,
> true);
> + priv->rx_tstamp = true;
> + /* TS is set for all frame types, not only those requested */
> + config.rx_filter = HWTSTAMP_FILTER_ALL;
> + }
> +
> + return copy_to_user(rq->ifr_data, &config, sizeof(config)) ?
> + -EFAULT : 0;
> +}
> +
> static int dpaa_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
> {
> - if (!net_dev->phydev)
> - return -EINVAL;
> - return phy_mii_ioctl(net_dev->phydev, rq, cmd);
> + int ret = -EINVAL;
> +
> + if (cmd == SIOCGMIIREG) {
> + if (net_dev->phydev)
> + return phy_mii_ioctl(net_dev->phydev, rq, cmd);
> + }
> +
> + if (cmd == SIOCSHWTSTAMP)
> + return dpaa_ts_ioctl(net_dev, rq, cmd);
> +
> + return ret;
> }
>
> static const struct net_device_ops dpaa_ops = {
> diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
> b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
> index bd94220..af320f8 100644
> --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
> +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
> @@ -182,6 +182,9 @@ struct dpaa_priv {
>
> struct dpaa_buffer_layout buf_layout[2];
> u16 rx_headroom;
> +
> + bool tx_tstamp; /* Tx timestamping enabled */
> + bool rx_tstamp; /* Rx timestamping enabled */
> };
>
> /* from dpaa_ethtool.c */
> --
> 1.7.1
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