Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 177 insertions, 44 deletions

diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index ab64a14..8961209 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -8,10 +8,14 @@
 
 #include "sfp.h"
 
+/**
+ * struct sfp_bus - internal representation of a sfp bus
+ */
 struct sfp_bus {
+	/* private: */
 	struct kref kref;
 	struct list_head node;
-	struct device_node *device_node;
+	struct fwnode_handle *fwnode;
 
 	const struct sfp_socket_ops *socket_ops;
 	struct device *sfp_dev;
@@ -26,6 +30,20 @@ struct sfp_bus {
 	bool started;
 };
 
+/**
+ * sfp_parse_port() - Parse the EEPROM base ID, setting the port type
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ * @id: a pointer to the module's &struct sfp_eeprom_id
+ * @support: optional pointer to an array of unsigned long for the
+ *   ethtool support mask
+ *
+ * Parse the EEPROM identification given in @id, and return one of
+ * %PORT_TP, %PORT_FIBRE or %PORT_OTHER. If @support is non-%NULL,
+ * also set the ethtool %ETHTOOL_LINK_MODE_xxx_BIT corresponding with
+ * the connector type.
+ *
+ * If the port type is not known, returns %PORT_OTHER.
+ */
 int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		   unsigned long *support)
 {
@@ -39,21 +57,19 @@ int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 	case SFP_CONNECTOR_MT_RJ:
 	case SFP_CONNECTOR_MU:
 	case SFP_CONNECTOR_OPTICAL_PIGTAIL:
-		if (support)
-			phylink_set(support, FIBRE);
 		port = PORT_FIBRE;
 		break;
 
 	case SFP_CONNECTOR_RJ45:
-		if (support)
-			phylink_set(support, TP);
 		port = PORT_TP;
 		break;
 
+	case SFP_CONNECTOR_COPPER_PIGTAIL:
+		port = PORT_DA;
+		break;
+
 	case SFP_CONNECTOR_UNSPEC:
 		if (id->base.e1000_base_t) {
-			if (support)
-				phylink_set(support, TP);
 			port = PORT_TP;
 			break;
 		}
@@ -62,7 +78,6 @@ int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 	case SFP_CONNECTOR_MPO_1X12:
 	case SFP_CONNECTOR_MPO_2X16:
 	case SFP_CONNECTOR_HSSDC_II:
-	case SFP_CONNECTOR_COPPER_PIGTAIL:
 	case SFP_CONNECTOR_NOSEPARATE:
 	case SFP_CONNECTOR_MXC_2X16:
 		port = PORT_OTHER;
@@ -74,10 +89,40 @@ int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		break;
 	}
 
+	if (support) {
+		switch (port) {
+		case PORT_FIBRE:
+			phylink_set(support, FIBRE);
+			break;
+
+		case PORT_TP:
+			phylink_set(support, TP);
+			break;
+		}
+	}
+
 	return port;
 }
 EXPORT_SYMBOL_GPL(sfp_parse_port);
 
+/**
+ * sfp_parse_interface() - Parse the phy_interface_t
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ * @id: a pointer to the module's &struct sfp_eeprom_id
+ *
+ * Derive the phy_interface_t mode for the information found in the
+ * module's identifying EEPROM. There is no standard or defined way
+ * to derive this information, so we use some heuristics.
+ *
+ * If the encoding is 64b66b, then the module must be >= 10G, so
+ * return %PHY_INTERFACE_MODE_10GKR.
+ *
+ * If it's 8b10b, then it's 1G or slower. If it's definitely a fibre
+ * module, return %PHY_INTERFACE_MODE_1000BASEX mode, otherwise return
+ * %PHY_INTERFACE_MODE_SGMII mode.
+ *
+ * If the encoding is not known, return %PHY_INTERFACE_MODE_NA.
+ */
 phy_interface_t sfp_parse_interface(struct sfp_bus *bus,
 				    const struct sfp_eeprom_id *id)
 {
@@ -107,6 +152,11 @@ phy_interface_t sfp_parse_interface(struct sfp_bus *bus,
 		break;
 
 	default:
+		if (id->base.e1000_base_cx) {
+			iface = PHY_INTERFACE_MODE_1000BASEX;
+			break;
+		}
+
 		iface = PHY_INTERFACE_MODE_NA;
 		dev_err(bus->sfp_dev,
 			"SFP module encoding does not support 8b10b nor 64b66b\n");
@@ -117,13 +167,38 @@ phy_interface_t sfp_parse_interface(struct sfp_bus *bus,
 }
 EXPORT_SYMBOL_GPL(sfp_parse_interface);
 
+/**
+ * sfp_parse_support() - Parse the eeprom id for supported link modes
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ * @id: a pointer to the module's &struct sfp_eeprom_id
+ * @support: pointer to an array of unsigned long for the ethtool support mask
+ *
+ * Parse the EEPROM identification information and derive the supported
+ * ethtool link modes for the module.
+ */
 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		       unsigned long *support)
 {
+	unsigned int br_min, br_nom, br_max;
+
 	phylink_set(support, Autoneg);
 	phylink_set(support, Pause);
 	phylink_set(support, Asym_Pause);
 
+	/* Decode the bitrate information to MBd */
+	br_min = br_nom = br_max = 0;
+	if (id->base.br_nominal) {
+		if (id->base.br_nominal != 255) {
+			br_nom = id->base.br_nominal * 100;
+			br_min = br_nom + id->base.br_nominal * id->ext.br_min;
+			br_max = br_nom + id->base.br_nominal * id->ext.br_max;
+		} else if (id->ext.br_max) {
+			br_nom = 250 * id->ext.br_max;
+			br_max = br_nom + br_nom * id->ext.br_min / 100;
+			br_min = br_nom - br_nom * id->ext.br_min / 100;
+		}
+	}
+
 	/* Set ethtool support from the compliance fields. */
 	if (id->base.e10g_base_sr)
 		phylink_set(support, 10000baseSR_Full);
@@ -142,6 +217,34 @@ void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		phylink_set(support, 1000baseT_Full);
 	}
 
+	/* 1000Base-PX or 1000Base-BX10 */
+	if ((id->base.e_base_px || id->base.e_base_bx10) &&
+	    br_min <= 1300 && br_max >= 1200)
+		phylink_set(support, 1000baseX_Full);
+
+	/* For active or passive cables, select the link modes
+	 * based on the bit rates and the cable compliance bytes.
+	 */
+	if ((id->base.sfp_ct_passive || id->base.sfp_ct_active) && br_nom) {
+		/* This may look odd, but some manufacturers use 12000MBd */
+		if (br_min <= 12000 && br_max >= 10300)
+			phylink_set(support, 10000baseCR_Full);
+		if (br_min <= 3200 && br_max >= 3100)
+			phylink_set(support, 2500baseX_Full);
+		if (br_min <= 1300 && br_max >= 1200)
+			phylink_set(support, 1000baseX_Full);
+	}
+	if (id->base.sfp_ct_passive) {
+		if (id->base.passive.sff8431_app_e)
+			phylink_set(support, 10000baseCR_Full);
+	}
+	if (id->base.sfp_ct_active) {
+		if (id->base.active.sff8431_app_e ||
+		    id->base.active.sff8431_lim) {
+			phylink_set(support, 10000baseCR_Full);
+		}
+	}
+
 	switch (id->base.extended_cc) {
 	case 0x00: /* Unspecified */
 		break;
@@ -175,35 +278,6 @@ void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		if (id->base.br_nominal >= 12)
 			phylink_set(support, 1000baseX_Full);
 	}
-
-	switch (id->base.connector) {
-	case SFP_CONNECTOR_SC:
-	case SFP_CONNECTOR_FIBERJACK:
-	case SFP_CONNECTOR_LC:
-	case SFP_CONNECTOR_MT_RJ:
-	case SFP_CONNECTOR_MU:
-	case SFP_CONNECTOR_OPTICAL_PIGTAIL:
-		break;
-
-	case SFP_CONNECTOR_UNSPEC:
-		if (id->base.e1000_base_t)
-			break;
-
-	case SFP_CONNECTOR_SG: /* guess */
-	case SFP_CONNECTOR_MPO_1X12:
-	case SFP_CONNECTOR_MPO_2X16:
-	case SFP_CONNECTOR_HSSDC_II:
-	case SFP_CONNECTOR_COPPER_PIGTAIL:
-	case SFP_CONNECTOR_NOSEPARATE:
-	case SFP_CONNECTOR_MXC_2X16:
-	default:
-		/* a guess at the supported link modes */
-		dev_warn(bus->sfp_dev,
-			 "Guessing link modes, please report...\n");
-		phylink_set(support, 1000baseT_Half);
-		phylink_set(support, 1000baseT_Full);
-		break;
-	}
 }
 EXPORT_SYMBOL_GPL(sfp_parse_support);
 
@@ -215,7 +289,7 @@ static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)
 	return bus->registered ? bus->upstream_ops : NULL;
 }
 
-static struct sfp_bus *sfp_bus_get(struct device_node *np)
+static struct sfp_bus *sfp_bus_get(struct fwnode_handle *fwnode)
 {
 	struct sfp_bus *sfp, *new, *found = NULL;
 
@@ -224,7 +298,7 @@ static struct sfp_bus *sfp_bus_get(struct device_node *np)
 	mutex_lock(&sfp_mutex);
 
 	list_for_each_entry(sfp, &sfp_buses, node) {
-		if (sfp->device_node == np) {
+		if (sfp->fwnode == fwnode) {
 			kref_get(&sfp->kref);
 			found = sfp;
 			break;
@@ -233,7 +307,7 @@ static struct sfp_bus *sfp_bus_get(struct device_node *np)
 
 	if (!found && new) {
 		kref_init(&new->kref);
-		new->device_node = np;
+		new->fwnode = fwnode;
 		list_add(&new->node, &sfp_buses);
 		found = new;
 		new = NULL;
@@ -246,7 +320,7 @@ static struct sfp_bus *sfp_bus_get(struct device_node *np)
 	return found;
 }
 
-static void sfp_bus_release(struct kref *kref) __releases(sfp_mutex)
+static void sfp_bus_release(struct kref *kref)
 {
 	struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);
 
@@ -293,6 +367,16 @@ static void sfp_unregister_bus(struct sfp_bus *bus)
 	bus->registered = false;
 }
 
+/**
+ * sfp_get_module_info() - Get the ethtool_modinfo for a SFP module
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ * @modinfo: a &struct ethtool_modinfo
+ *
+ * Fill in the type and eeprom_len parameters in @modinfo for a module on
+ * the sfp bus specified by @bus.
+ *
+ * Returns 0 on success or a negative errno number.
+ */
 int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
 {
 	if (!bus->registered)
@@ -301,6 +385,17 @@ int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
 }
 EXPORT_SYMBOL_GPL(sfp_get_module_info);
 
+/**
+ * sfp_get_module_eeprom() - Read the SFP module EEPROM
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ * @ee: a &struct ethtool_eeprom
+ * @data: buffer to contain the EEPROM data (must be at least @ee->len bytes)
+ *
+ * Read the EEPROM as specified by the supplied @ee. See the documentation
+ * for &struct ethtool_eeprom for the region to be read.
+ *
+ * Returns 0 on success or a negative errno number.
+ */
 int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
 			  u8 *data)
 {
@@ -310,6 +405,15 @@ int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
 }
 EXPORT_SYMBOL_GPL(sfp_get_module_eeprom);
 
+/**
+ * sfp_upstream_start() - Inform the SFP that the network device is up
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ *
+ * Inform the SFP socket that the network device is now up, so that the
+ * module can be enabled by allowing TX_DISABLE to be deasserted. This
+ * should be called from the network device driver's &struct net_device_ops
+ * ndo_open() method.
+ */
 void sfp_upstream_start(struct sfp_bus *bus)
 {
 	if (bus->registered)
@@ -318,6 +422,15 @@ void sfp_upstream_start(struct sfp_bus *bus)
 }
 EXPORT_SYMBOL_GPL(sfp_upstream_start);
 
+/**
+ * sfp_upstream_stop() - Inform the SFP that the network device is down
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ *
+ * Inform the SFP socket that the network device is now up, so that the
+ * module can be disabled by asserting TX_DISABLE, disabling the laser
+ * in optical modules. This should be called from the network device
+ * driver's &struct net_device_ops ndo_stop() method.
+ */
 void sfp_upstream_stop(struct sfp_bus *bus)
 {
 	if (bus->registered)
@@ -326,11 +439,24 @@ void sfp_upstream_stop(struct sfp_bus *bus)
 }
 EXPORT_SYMBOL_GPL(sfp_upstream_stop);
 
-struct sfp_bus *sfp_register_upstream(struct device_node *np,
+/**
+ * sfp_register_upstream() - Register the neighbouring device
+ * @fwnode: firmware node for the SFP bus
+ * @ndev: network device associated with the interface
+ * @upstream: the upstream private data
+ * @ops: the upstream's &struct sfp_upstream_ops
+ *
+ * Register the upstream device (eg, PHY) with the SFP bus. MAC drivers
+ * should use phylink, which will call this function for them. Returns
+ * a pointer to the allocated &struct sfp_bus.
+ *
+ * On error, returns %NULL.
+ */
+struct sfp_bus *sfp_register_upstream(struct fwnode_handle *fwnode,
 				      struct net_device *ndev, void *upstream,
 				      const struct sfp_upstream_ops *ops)
 {
-	struct sfp_bus *bus = sfp_bus_get(np);
+	struct sfp_bus *bus = sfp_bus_get(fwnode);
 	int ret = 0;
 
 	if (bus) {
@@ -353,6 +479,13 @@ struct sfp_bus *sfp_register_upstream(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(sfp_register_upstream);
 
+/**
+ * sfp_unregister_upstream() - Unregister sfp bus
+ * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+ *
+ * Unregister a previously registered upstream connection for the SFP
+ * module. @bus is returned from sfp_register_upstream().
+ */
 void sfp_unregister_upstream(struct sfp_bus *bus)
 {
 	rtnl_lock();
@@ -434,7 +567,7 @@ EXPORT_SYMBOL_GPL(sfp_module_remove);
 struct sfp_bus *sfp_register_socket(struct device *dev, struct sfp *sfp,
 				    const struct sfp_socket_ops *ops)
 {
-	struct sfp_bus *bus = sfp_bus_get(dev->of_node);
+	struct sfp_bus *bus = sfp_bus_get(dev->fwnode);
 	int ret = 0;
 
 	if (bus) {