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Default branch: MAIN
Current tag: phil-wifi-20200421
Revision 1.73 / (download) - annotate - [select for diffs], Sun Mar 15 23:04:50 2020 UTC (4 years, 1 month ago) by thorpej
Branch: MAIN
CVS Tags: thorpej-i2c-spi-conf2-base,
thorpej-i2c-spi-conf2,
thorpej-i2c-spi-conf-base,
thorpej-i2c-spi-conf,
thorpej-futex2-base,
thorpej-futex2,
thorpej-futex-base,
thorpej-futex,
thorpej-cfargs2-base,
thorpej-cfargs2,
thorpej-cfargs-base,
thorpej-cfargs,
phil-wifi-20200421,
phil-wifi-20200411,
phil-wifi-20200406,
cjep_sun2x-base1,
cjep_sun2x-base,
cjep_sun2x,
cjep_staticlib_x-base1,
cjep_staticlib_x-base,
cjep_staticlib_x,
bouyer-xenpvh-base2,
bouyer-xenpvh-base1,
bouyer-xenpvh-base,
bouyer-xenpvh
Changes since 1.72: +58 -72
lines
Diff to previous 1.72 (colored)
Define and implement a locking protocol for the ifmedia / mii layers: - MP-safe drivers provide a mutex to ifmedia that is used to serialize access to media-related structures / hardware regsiters. Converted drivers use the new ifmedia_init_with_lock() function for this. The new name is provided to ease the transition. - Un-converted drivers continue to call ifmedia_init(), which will supply a compatibility lock to be used instead. Several media-related entry points must be aware of this compatibility lock, and are able to acquire it recursively a limited number of times, if needed. This is a SPIN mutex with priority IPL_NET. - This same lock is used to serialize access to PHY registers and other MII-related data structures. The PHY drivers are modified to acquire and release the lock, as needed, and assert the lock is held as a diagnostic aid. The "usbnet" framework has had an overhaul of its internal locking protocols to fit in with the media / mii changes, and the drivers adapted. USB wifi drivers have been changed to provide their own adaptive mutex to the ifmedia later via a new ieee80211_media_init_with_lock() function. This is required because the USB drivers need an adaptive mutex. Besised "usbnet", a few other drivers are converted: vmx, wm, ixgbe / ixv. mcx also now calls ifmedia_init_with_lock() because it needs to also use an adaptive mutex. The mcx driver still needs to be fully converted to NET_MPSAFE.