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Rusty Russell c45a6816c1 virtio: explicit advertisement of driver features 
A recent proposed feature addition to the virtio block driver revealed
some flaws in the API: in particular, we assume that feature
negotiation is complete once a driver's probe function returns.

There is nothing in the API to require this, however, and even I
didn't notice when it was violated.

So instead, we require the driver to specify what features it supports
in a table, we can then move the feature negotiation into the virtio
core.  The intersection of device and driver features are presented in
a new 'features' bitmap in the struct virtio_device.

Note that this highlights the difference between Linux unsigned-long
bitmaps where each unsigned long is in native endian, and a
straight-forward little-endian array of bytes.

Drivers can still remove feature bits in their probe routine if they
really have to.

API changes:
- dev->config->feature() no longer gets and acks a feature.
- drivers should advertise their features in the 'feature_table' field
- use virtio_has_feature() for extra sanity when checking feature bits

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 		2008-05-02 21:50:50 +10:00
..
accessibility Basic braille screen reader support 2008-04-30 08:29:52 -07:00
acorn/char
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acpi Fix ACPI vs proc_create_data() mismerge 2008-04-30 16:26:27 -07:00
amba
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ata ahci: SB600 ahci can't do MSI, blacklist that capability 2008-04-29 17:42:04 -04:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-30 08:45:48 -07:00
auxdisplay
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base cpu: change cpu_sys_devices from array to per_cpu variable 2008-05-01 08:04:02 -07:00
block virtio: explicit advertisement of driver features 2008-05-02 21:50:50 +10:00
bluetooth tty: add throttle/unthrottle helpers 2008-04-30 08:29:47 -07:00
cdrom Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-04-29 08:18:03 -07:00
char drivers-char-synclinkc-inbreak-mgsl_put_char-fix 2008-05-01 08:04:02 -07:00
clocksource
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connector
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cpufreq [CPUFREQ] state info wrong after resume 2008-04-28 16:27:08 -04:00
cpuidle cpuidle: fix 100% C0 statistics regression 2008-03-26 00:58:19 -04:00
crypto [CRYPTO] padlock-aes: Use generic setkey function 2008-04-21 10:19:34 +08:00
dca
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dio
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dma DMA engine: typo fixes 2008-04-21 22:38:45 +00:00
edac pasemi_edac needs to include linux/edac.h 2008-04-29 19:06:57 -07:00
eisa
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firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-05-01 11:31:38 -07:00
firmware edd: add default mode CONFIG_EDD_OFF=n, override with edd={on,off} 2008-04-29 08:06:23 -07:00
gpio gpio: pca953x: add support for pca9555 I2C I/O expander 2008-05-01 08:04:01 -07:00
hid hid-core: use get_unaligned_* helpers 2008-04-29 08:06:27 -07:00
hwmon Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6 2008-05-01 08:28:26 -07:00
i2c i2c: Convert most new-style drivers to use module aliasing 2008-04-29 23:11:40 +02:00
ide ide: fix early setup of hwif->host_flags 2008-05-01 14:08:51 +02:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-05-01 11:31:38 -07:00
infiniband RDMA/nes: Formatting cleanup 2008-04-29 13:46:54 -07:00
input tty: The big operations rework 2008-04-30 08:29:47 -07:00
isdn isdn: hysdn_procconf.c build fix 2008-05-01 08:03:59 -07:00
leds Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
lguest virtio: explicit advertisement of driver features 2008-05-02 21:50:50 +10:00
macintosh [POWERPC] windfarm: Add PowerMac 12,1 support 2008-04-29 15:57:35 +10:00
mca proc: remove proc_root from drivers 2008-04-29 08:06:18 -07:00
md md: support blocking writes to an array on device failure 2008-04-30 08:29:33 -07:00
media fix drivers/media/common/tuners/ build bug 2008-04-30 08:36:04 -07:00
memstick memstick: convert struct class_device to struct device 2008-04-19 19:10:29 -07:00
message Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
mfd drivers: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:53 -07:00
misc Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
mmc Merge master.kernel.org:/home/rmk/linux-2.6-arm 2008-04-29 15:18:06 -07:00
mtd Merge git://git.infradead.org/mtd-2.6 2008-05-01 11:15:28 -07:00
net virtio: explicit advertisement of driver features 2008-05-02 21:50:50 +10:00
nubus proc: convert /proc/bus/nubus to seq_file interface 2008-04-29 08:06:19 -07:00
of [POWERPC] drivers/of/of_i2c.c: Add MODULE_LICENSE 2008-04-24 20:58:01 +10:00
oprofile oprofile: change cpu_buffer from array to per_cpu variable 2008-04-28 08:58:31 -07:00
parisc parisc: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
parport debugobjects: add timer specific object debugging code 2008-04-30 08:29:53 -07:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2008-04-29 10:17:59 -07:00
pcmcia pcmcia: replace remaining __FUNCTION__ occurrences 2008-05-01 08:04:00 -07:00
pnp PNP: fix printk format warnings 2008-05-01 08:04:00 -07:00
power x86: olpc: add One Laptop Per Child architecture support 2008-04-29 08:06:07 -07:00
ps3 [POWERPC] PS3: Sys-manager Wake-on-LAN support 2008-04-01 20:43:08 +11:00
rapidio [RAPIDIO] Auto-probe the RapidIO system size 2008-04-29 19:40:28 +10:00
rtc Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-30 08:45:48 -07:00
sbus drivers: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:53 -07:00
scsi drivers/scsi/mvsas.c: fix printk warnings 2008-05-01 08:04:03 -07:00
serial jsm: add new supported board to jsm serial driver 2008-05-01 08:04:01 -07:00
sh
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sn
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spi spi_s3c24xx signedness fix 2008-05-01 08:04:01 -07:00
ssb ssb: Fix all-ones boardflags 2008-04-23 21:25:35 -04:00
tc
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telephony
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thermal thermal: re-name thermal.c to thermal_sys.c 2008-04-29 03:12:17 -04:00
uio UIO: hold a reference to the device's owner while the device is open 2008-04-19 19:10:18 -07:00
usb tty: The big operations rework 2008-04-30 08:29:47 -07:00
video pxafb: preliminary smart panel interface support (update) 2008-04-30 08:29:32 -07:00
virtio virtio: explicit advertisement of driver features 2008-05-02 21:50:50 +10:00
w1 drivers: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:53 -07:00
watchdog Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
xen xen: add balloon driver 2008-04-24 23:57:33 +02:00
zorro zorro: use non-racy method for proc entries creation 2008-04-29 08:06:21 -07:00
Kconfig Basic braille screen reader support 2008-04-30 08:29:52 -07:00
Makefile Basic braille screen reader support 2008-04-30 08:29:52 -07:00