From: Jiri Pirko <jiri@resnulli•us>
To: John Fastabend <john.fastabend@gmail•com>
Cc: netdev@vger•kernel.org, davem@davemloft•net,
nhorman@tuxdriver•com, andy@greyhouse•net, tgraf@suug•ch,
dborkman@redhat•com, ogerlitz@mellanox•com, jesse@nicira•com,
pshelar@nicira•com, azhou@nicira•com, ben@decadent•org.uk,
stephen@networkplumber•org, jeffrey.t.kirsher@intel•com,
vyasevic@redhat•com, xiyou.wangcong@gmail•com,
john.r.fastabend@intel•com, edumazet@google•com,
jhs@mojatatu•com, sfeldma@gmail•com, f.fainelli@gmail•com,
roopa@cumulusnetworks•com, linville@tuxdriver•com,
jasowang@redhat•com, ebiederm@xmission•com,
nicolas.dichtel@6wind•com, ryazanov.s.a@gmail•com,
buytenh@wantstofly•org, aviadr@mellanox•com, nbd@openwrt•org,
alexei.starovoitov@gmail•com, Neil.Jerram@metaswitch•com,
ronye@mellanox•com, simon.horman@netronome•com,
alexander.h.duyck@redhat•com, john.ronciak@intel•com,
mleitner@redhat•com, shrijeet@gmail•com,
gospo@cumulusnetworks•com, bcrl@kvac
Subject: Re: [patch net-next v2 05/10] rocker: introduce rocker switch driver
Date: Tue, 11 Nov 2014 16:28:24 +0100 [thread overview]
Message-ID: <20141111152824.GG1825@nanopsycho.lan> (raw)
In-Reply-To: <5461366A.9050900@gmail.com>
Mon, Nov 10, 2014 at 11:04:26PM CET, john.fastabend@gmail•com wrote:
>On 11/09/2014 02:51 AM, Jiri Pirko wrote:
>>This patch introduces the first driver to benefit from the switchdev
>>infrastructure and to implement newly introduced switch ndos. This is a
>>driver for emulated switch chip implemented in qemu:
>>https://github.com/sfeldma/qemu-rocker/
>>
>>This patch is a result of joint work with Scott Feldman.
>>
>>Signed-off-by: Scott Feldman <sfeldma@gmail•com>
>>Signed-off-by: Jiri Pirko <jiri@resnulli•us>
>>---
>> MAINTAINERS | 7 +
>> drivers/net/ethernet/Kconfig | 1 +
>> drivers/net/ethernet/Makefile | 1 +
>> drivers/net/ethernet/rocker/Kconfig | 27 +
>> drivers/net/ethernet/rocker/Makefile | 5 +
>> drivers/net/ethernet/rocker/rocker.c | 2060 ++++++++++++++++++++++++++++++++++
>> drivers/net/ethernet/rocker/rocker.h | 427 +++++++
>> 7 files changed, 2528 insertions(+)
>> create mode 100644 drivers/net/ethernet/rocker/Kconfig
>> create mode 100644 drivers/net/ethernet/rocker/Makefile
>> create mode 100644 drivers/net/ethernet/rocker/rocker.c
>> create mode 100644 drivers/net/ethernet/rocker/rocker.h
>>
>
>[...]
>
>>+
>>+static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
>>+{
>>+ struct rocker_port *rocker_port = netdev_priv(dev);
>>+ struct rocker *rocker = rocker_port->rocker;
>>+ struct rocker_desc_info *desc_info;
>>+ struct rocker_tlv *frags;
>>+ int i;
>>+ int err;
>>+
>>+ desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
>>+ if (unlikely(!desc_info)) {
>>+ if (net_ratelimit())
>
>Could you have a netif_stop_queue() here as well same as below? Not
>that optimizing the xmit routine is the interesting part of this patch.
>But I guess this is just some strange error path because I see you
>check this case below.
This code should never be reached.
If the ring is full, the queue is previously stopped by:
desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
if (!desc_info)
netif_stop_queue(dev);
>
>>+ netdev_err(dev, "tx ring full when queue awake\n");
>>+ return NETDEV_TX_BUSY;
>>+ }
>>+
>>+ rocker_desc_cookie_ptr_set(desc_info, skb);
>>+
>>+ frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
>>+ if (!frags)
>>+ goto out;
>>+ err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
>>+ skb->data, skb_headlen(skb));
>>+ if (err)
>>+ goto nest_cancel;
>>+ if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX)
>>+ goto nest_cancel;
>>+
>>+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
>>+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
>>+
>>+ err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
>>+ skb_frag_address(frag),
>>+ skb_frag_size(frag));
>>+ if (err)
>>+ goto unmap_frags;
>>+ }
>>+ rocker_tlv_nest_end(desc_info, frags);
>>+
>>+ rocker_desc_gen_clear(desc_info);
>>+ rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
>>+
>>+ desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
>>+ if (!desc_info)
>>+ netif_stop_queue(dev);
>
>I'm not entirely sure I followed the TLV usage here but OK. If it
>works...
>
>>+
>>+ return NETDEV_TX_OK;
>>+
>>+unmap_frags:
>>+ rocker_tx_desc_frags_unmap(rocker_port, desc_info);
>>+nest_cancel:
>>+ rocker_tlv_nest_cancel(desc_info, frags);
>>+out:
>>+ dev_kfree_skb(skb);
>>+ return NETDEV_TX_OK;
>>+}
>>+
>>+static int rocker_port_set_mac_address(struct net_device *dev, void *p)
>>+{
>>+ struct sockaddr *addr = p;
>>+ struct rocker_port *rocker_port = netdev_priv(dev);
>>+ int err;
>>+
>>+ if (!is_valid_ether_addr(addr->sa_data))
>>+ return -EADDRNOTAVAIL;
>>+
>>+ err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
>>+ if (err)
>>+ return err;
>>+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
>>+ return 0;
>>+}
>>+
>>+static int rocker_port_sw_parent_id_get(struct net_device *dev,
>>+ struct netdev_phys_item_id *psid)
>>+{
>>+ struct rocker_port *rocker_port = netdev_priv(dev);
>>+ struct rocker *rocker = rocker_port->rocker;
>>+
>
>hmm looks like you read this out of a magic switch register :) but
>my switch doesn't have this magic reg. I suposse the switch MAC address
>should work.
>
>>+ psid->id_len = sizeof(rocker->hw.id);
>>+ memcpy(&psid->id, &rocker->hw.id, psid->id_len);
>>+ return 0;
>>+}
>>+
>>+static const struct net_device_ops rocker_port_netdev_ops = {
>>+ .ndo_open = rocker_port_open,
>>+ .ndo_stop = rocker_port_stop,
>>+ .ndo_start_xmit = rocker_port_xmit,
>>+ .ndo_set_mac_address = rocker_port_set_mac_address,
>>+ .ndo_sw_parent_id_get = rocker_port_sw_parent_id_get,
>>+};
>>+
>>+/********************
>>+ * ethtool interface
>>+ ********************/
>>+
>>+static int rocker_port_get_settings(struct net_device *dev,
>>+ struct ethtool_cmd *ecmd)
>>+{
>>+ struct rocker_port *rocker_port = netdev_priv(dev);
>>+
>>+ return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
>>+}
>>+
>>+static int rocker_port_set_settings(struct net_device *dev,
>>+ struct ethtool_cmd *ecmd)
>>+{
>>+ struct rocker_port *rocker_port = netdev_priv(dev);
>>+
>>+ return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
>>+}
>>+
>>+static void rocker_port_get_drvinfo(struct net_device *dev,
>>+ struct ethtool_drvinfo *drvinfo)
>>+{
>>+ strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
>>+ strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
>>+}
>>+
>>+static const struct ethtool_ops rocker_port_ethtool_ops = {
>>+ .get_settings = rocker_port_get_settings,
>>+ .set_settings = rocker_port_set_settings,
>>+ .get_drvinfo = rocker_port_get_drvinfo,
>>+ .get_link = ethtool_op_get_link,
>>+};
>>+
>
>[...]
>
>Looks reasonable to me, although I mostly scanned it and looked
>over the interface parts. My comments are just observations no
>need to change anything for them.
>
>Reviewed-by: John Fastabend <john.r.fastabend@intel•com>
>
>
>--
>John Fastabend Intel Corporation
next prev parent reply other threads:[~2014-11-11 15:28 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-09 10:51 [patch net-next v2 00/10] introduce rocker switch driver with hardware accelerated datapath api - phase 1: bridge fdb offload Jiri Pirko
2014-11-09 10:51 ` [patch net-next v2 01/10] net: rename netdev_phys_port_id to more generic name Jiri Pirko
2014-11-10 3:35 ` Jamal Hadi Salim
2014-11-10 5:23 ` David Miller
2014-11-10 12:06 ` Jamal Hadi Salim
2014-11-10 12:33 ` Daniel Borkmann
2014-11-10 12:56 ` Jamal Hadi Salim
2014-11-10 16:28 ` David Miller
2014-11-10 7:43 ` Jiri Pirko
2014-11-10 12:17 ` Jamal Hadi Salim
2014-11-10 13:16 ` Jiri Pirko
2014-11-10 13:20 ` Jamal Hadi Salim
2014-11-10 16:28 ` David Miller
2014-11-10 19:03 ` Jamal Hadi Salim
2014-11-10 21:57 ` John Fastabend
2014-11-09 10:51 ` [patch net-next v2 02/10] net: introduce generic switch devices support Jiri Pirko
2014-11-10 21:59 ` John Fastabend
2014-11-11 15:11 ` Jiri Pirko
2014-11-11 9:49 ` M. Braun
2014-11-11 10:04 ` Jiri Pirko
2014-11-19 13:28 ` Roopa Prabhu
2014-11-19 13:46 ` Jiri Pirko
2014-11-19 13:59 ` Roopa Prabhu
2014-11-20 15:55 ` Andy Gospodarek
2014-11-21 7:16 ` Jiri Pirko
2014-11-09 10:51 ` [patch net-next v2 03/10] rtnl: expose physical switch id for particular device Jiri Pirko
2014-11-10 3:43 ` Jamal Hadi Salim
2014-11-10 7:45 ` Jiri Pirko
2014-11-10 17:58 ` Roopa Prabhu
2014-11-10 20:02 ` Scott Feldman
2014-11-11 13:55 ` Roopa Prabhu
2014-11-10 22:14 ` Jiri Pirko
2014-11-10 22:31 ` John Fastabend
2014-11-10 22:01 ` John Fastabend
2014-11-09 10:51 ` [patch net-next v2 04/10] net-sysfs: " Jiri Pirko
2014-11-10 22:01 ` John Fastabend
2014-11-09 10:51 ` [patch net-next v2 05/10] rocker: introduce rocker switch driver Jiri Pirko
2014-11-10 22:04 ` John Fastabend
2014-11-11 14:29 ` Thomas Graf
2014-11-11 15:19 ` Jiri Pirko
2014-11-11 15:32 ` Thomas Graf
2014-11-11 15:40 ` Jiri Pirko
2014-11-11 16:10 ` Thomas Graf
2014-11-27 14:09 ` Florian Fainelli
2014-11-11 15:41 ` Roopa Prabhu
2014-11-11 15:44 ` John Fastabend
2014-11-11 15:28 ` Jiri Pirko [this message]
2014-11-09 10:51 ` [patch net-next v2 06/10] bridge: introduce fdb offloading via switchdev Jiri Pirko
2014-11-10 3:47 ` Jamal Hadi Salim
2014-11-10 8:15 ` Jiri Pirko
2014-11-10 9:30 ` Scott Feldman
2014-11-10 12:47 ` Jamal Hadi Salim
2014-11-10 13:47 ` Jiri Pirko
2014-11-10 19:13 ` Jamal Hadi Salim
2014-11-10 13:51 ` Thomas Graf
2014-11-10 17:30 ` Andy Gospodarek
2014-11-10 19:03 ` Roopa Prabhu
2014-11-12 13:43 ` Jiri Pirko
2014-11-09 10:51 ` [patch net-next v2 07/10] bridge: call netdev_sw_port_stp_update when bridge port STP status changes Jiri Pirko
2014-11-10 13:11 ` Jamal Hadi Salim
2014-11-10 14:04 ` Thomas Graf
2014-11-10 19:20 ` Jamal Hadi Salim
2014-11-10 15:59 ` Roopa Prabhu
2014-11-09 10:51 ` [patch net-next v2 08/10] bridge: add API to notify bridge driver of learned FBD on offloaded device Jiri Pirko
2014-11-11 14:21 ` Roopa Prabhu
2014-11-11 17:38 ` Scott Feldman
2014-11-11 21:43 ` Roopa Prabhu
2014-11-09 10:51 ` [patch net-next v2 09/10] rocker: implement rocker ofdpa flow table manipulation Jiri Pirko
2014-11-09 10:51 ` [patch net-next v2 10/10] rocker: implement L2 bridge offloading Jiri Pirko
2014-11-10 3:53 ` Jamal Hadi Salim
2014-11-10 8:18 ` Jiri Pirko
2014-11-10 9:10 ` Nicolas Dichtel
2014-11-10 8:46 ` Scott Feldman
2014-11-10 12:27 ` Jamal Hadi Salim
2014-11-10 16:12 ` Roopa Prabhu
2014-11-10 17:36 ` Scott Feldman
2014-11-10 18:35 ` Roopa Prabhu
2014-11-10 19:27 ` Jamal Hadi Salim
2014-11-10 19:47 ` Scott Feldman
2014-11-10 21:14 ` Jamal Hadi Salim
2014-11-10 19:25 ` Jamal Hadi Salim
2014-11-10 17:22 ` Scott Feldman
2014-11-09 16:40 ` [patch net-next] bridge: rename fdb_*_hw to fdb_*_hw_addr to avoid confusion Jiri Pirko
2014-11-11 2:33 ` David Miller
2014-11-11 7:20 ` Jiri Pirko
2014-11-10 3:31 ` [patch net-next v2 00/10] introduce rocker switch driver with hardware accelerated datapath api - phase 1: bridge fdb offload Jamal Hadi Salim
2014-11-10 3:46 ` Simon Horman
2014-11-10 4:03 ` Jamal Hadi Salim
2014-11-10 4:58 ` Simon Horman
2014-11-10 22:23 ` John Fastabend
2014-11-11 8:51 ` Simon Horman
2014-11-13 5:44 ` Simon Horman
2014-11-13 6:31 ` John Fastabend
2014-11-21 2:01 ` Simon Horman
2014-11-21 7:20 ` John Fastabend
2014-11-10 7:23 ` Jiri Pirko
2014-11-10 12:16 ` Jamal Hadi Salim
2014-11-10 13:12 ` Jiri Pirko
2014-11-10 16:48 ` Thomas Graf
2014-11-12 13:44 ` Jiri Pirko
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