FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F13.1.0 2018-07-27T10:40:48Z 2018-07-27T10:40:48Z Eitan Adler eadler@FreeBSD.org 2018-07-27T10:40:48Z urn:sha1:33f4bccaa6c57c6025c63daf4f20b812dad30257 2010-11-15T05:25:51Z Doug Barton dougb@FreeBSD.org 2010-11-15T05:25:51Z urn:sha1:eb581844e4339a481b679f315bd1cc8da837555e 2005-10-01T18:56:19Z Gleb Smirnoff glebius@FreeBSD.org 2005-10-01T18:56:19Z urn:sha1:40929967748cc0fadf124a871e7dae69f57f5f63 o Axe poll in trap. o Axe IFF_POLLING flag from if_flags. o Rework revision 1.21 (Giant removal), in such a way that poll_mtx is not dropped during call to polling handler. This fixes problem with idle polling. o Make registration and deregistration from polling in a functional way, insted of next tick/interrupt. o Obsolete kern.polling.enable. Polling is turned on/off with ifconfig. Detailed kern_poll.c changes: - Remove polling handler flags, introduced in 1.21. The are not needed now. - Forget and do not check if_flags, if_capenable and if_drv_flags. - Call all registered polling handlers unconditionally. - Do not drop poll_mtx, when entering polling handlers. - In ether_poll() NET_LOCK_GIANT prior to locking poll_mtx. - In netisr_poll() axe the block, where polling code asks drivers to unregister. - In netisr_poll() and ether_poll() do polling always, if any handlers are present. - In ether_poll_[de]register() remove a lot of error hiding code. Assert that arguments are correct, instead. - In ether_poll_[de]register() use standard return values in case of error or success. - Introduce poll_switch() that is a sysctl handler for kern.polling.enable. poll_switch() goes through interface list and enabled/disables polling. A message that kern.polling.enable is deprecated is printed. Detailed driver changes: - On attach driver announces IFCAP_POLLING in if_capabilities, but not in if_capenable. - On detach driver calls ether_poll_deregister() if polling is enabled. - In polling handler driver obtains its lock and checks IFF_DRV_RUNNING flag. If there is no, then unlocks and returns. - In ioctl handler driver checks for IFCAP_POLLING flag requested to be set or cleared. Driver first calls ether_poll_[de]register(), then obtains driver lock and [dis/en]ables interrupts. - In interrupt handler driver checks IFCAP_POLLING flag in if_capenable. If present, then returns.This is important to protect from spurious interrupts. Reviewed by: ru, sam, jhb 2002-09-13T12:31:56Z Katsushi Kobayashi ikob@FreeBSD.org 2002-09-13T12:31:56Z urn:sha1:3c60ba66c4479fdf0045acf25f21c6806fd06c0f Bus Protocol 2:SCSI over IEEE1394) support for CAM.