user/sven/linux.git/include/linux/phy.h, branch v3.0.50

net: hold sock reference while processing tx timestamps

2011-11-11T17:35:52Z

commit da92b194cc36b5dc1fbd85206aeeffd80bee0c39 upstream. The pair of functions, * skb_clone_tx_timestamp() * skb_complete_tx_timestamp() were designed to allow timestamping in PHY devices. The first function, called during the MAC driver's hard_xmit method, identifies PTP protocol packets, clones them, and gives them to the PHY device driver. The PHY driver may hold onto the packet and deliver it at a later time using the second function, which adds the packet to the socket's error queue. As pointed out by Johannes, nothing prevents the socket from disappearing while the cloned packet is sitting in the PHY driver awaiting a timestamp. This patch fixes the issue by taking a reference on the socket for each such packet. In addition, the comments regarding the usage of these function are expanded to highlight the rule that PHY drivers must use skb_complete_tx_timestamp() to release the packet, in order to release the socket reference, too. These functions first appeared in v2.6.36. Reported-by: Johannes Berg Signed-off-by: Richard Cochran Signed-off-by: Eric Dumazet Reviewed-by: Johannes Berg Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

phylib: make local function static

2010-10-24T22:07:11Z

The following functions are not used directly by any drivers: phy_attach_direct phy_device_create phy_prepare_link genphy_config_advert genphy_setup_forced phy_config_interrupt phy_clear_interrypt phy_sanitize_settings phy_enable_interrupts phy_disable_interrupts Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

net: Improve comments in include/linux/phy.h

2010-09-02T17:12:05Z

Correct state range of PHY bus addresses (i.e. 0-31) in comment, make spelling of PHY consistent in comments. Signed-off-by: Peter Meerwald Signed-off-by: David S. Miller

net: support time stamping in phy devices.

2010-07-19T02:15:26Z

This patch adds a new networking option to allow hardware time stamps from PHY devices. When enabled, likely candidates among incoming and outgoing network packets are offered to the PHY driver for possible time stamping. When accepted by the PHY driver, incoming packets are deferred for later delivery by the driver. The patch also adds phylib driver methods for the SIOCSHWTSTAMP ioctl and callbacks for transmit and receive time stamping. Drivers may optionally implement these functions. Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

net: preserve ifreq parameter when calling generic phy_mii_ioctl().

2010-07-19T02:15:25Z

The phy_mii_ioctl() function unnecessarily throws away the original ifreq. We need access to the ifreq in order to support PHYs that can perform hardware time stamping. Two maverick drivers filter the ioctl commands passed to phy_mii_ioctl(). This is unnecessary since phylib will check the command in any case. Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

phylib: Support phy module autoloading

2010-04-02T21:30:39Z

We don't use the normal hotplug mechanism because it doesn't work. It will load the module some time after the device appears, but that's not good enough for us -- we need the driver loaded _immediately_ because otherwise the NIC driver may just abort and then the phy 'device' goes away. [bwh: s/phy/mdio/ in module alias, kerneldoc for struct mdio_device_id] Signed-off-by: David Woodhouse Signed-off-by: Ben Hutchings Acked-by: Andy Fleming Signed-off-by: David S. Miller

NET: Support clause 45 MDIO commands at the MDIO bus level

2010-03-17T04:23:42Z

IEEE 802.3ae clause 45 specifies a somewhat modified MDIO protocol for use by 10GIGE phys. The main change is a 21 bit address split into a 5 bit device ID and a 16 bit register offset. The definition is designed so that normal and extended devices can run on the same MDIO bus. Extend mdio-bitbang to do the new protocol. At the MDIO bus level the protocol is requested by or'ing MII_ADDR_C45 into the register offset. Make phy_read/phy_write/etc pass a full 32 bit register offset. This does not attempt to make the phy layer support C45 style PHYs, just to provide the MDIO bus support. Tested against a Broadcom 10GE phy with ID 0x206034, and several Broadcom 10/100/1000 Phys in normal mode. Signed-off-by: Jason Gunthorpe Signed-off-by: David S. Miller

libphy: add phy_find_first function

2010-02-04T18:23:02Z

Many drivers do this in them manually. Now they can use this function. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller

phylib: Move workqueue initialization to a proper place

2010-01-19T09:59:02Z

commit 541cd3ee00a4fe975b22fac6a3bc846bacef37f7 ("phylib: Fix deadlock on resume") caused TI DaVinci EMAC ethernet driver to oops upon resume: PM: resume of devices complete after 237.098 msecs Restarting tasks ... done. kernel BUG at kernel/workqueue.c:354! Unable to handle kernel NULL pointer dereference at virtual address 00000000 [...] Backtrace: [] (__bug+0x0/0x2c) from [] (queue_delayed_work_on+0x74/0xf8) [] (queue_delayed_work_on+0x0/0xf8) from [] (queue_delayed_work+0x2c/0x30) The oops pops up because TI DaVinci EMAC driver detaches PHY on suspend and attaches it back on resume. Attaching makes phylib call phy_start_machine() that initializes a workqueue. On the other hand, PHY's resume routine will call phy_start_machine() again, and that will cause the oops since we just destroyed the already scheduled workqueue. This patch fixes the issue by moving workqueue initialization to phy_device_create(). p.s. We don't see this oops with ucc_geth and gianfar drivers because they perform a fine-grained suspend, i.e. they just stop the PHYs without detaching. Reported-by: Sekhar Nori Signed-off-by: Anton Vorontsov Tested-by: Sekhar Nori Signed-off-by: David S. Miller

phylib: Properly reinitialize PHYs after hibernation

2009-12-31T06:03:42Z

Since hibernation assumes power loss, we should fully reinitialize PHYs (including platform fixups), as if PHYs were just attached. This patch factors phy_init_hw() out of phy_attach_direct(), then converts mdio_bus to dev_pm_ops and adds an appropriate restore() callback. Signed-off-by: Anton Vorontsov Signed-off-by: David S. Miller