diff options
| author |   Alexandre Bounine <alexandre.bounine@idt.com> | 2010-10-27 15:34:34 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:16 -0700 |
| commit | af84ca38aff94061dd0711edbb99b0900a9c28fd (patch) | |
| tree | 31f51e9106c0a0944ec168dc25399f12ab2fa527 /drivers/rapidio/rio.h | |
| parent | rapidio: add support for IDT CPS Gen2 switches (diff) | |
| download | linux-dev-af84ca38aff94061dd0711edbb99b0900a9c28fd.tar.xz linux-dev-af84ca38aff94061dd0711edbb99b0900a9c28fd.zip | |
rapidio: add handling of redundant routes
Detects RIO link to the already enumerated device and properly sets links
between device objects. Changes to the enumeration/discovery logic:
1. Use Master Enable bit to signal end of the enumeration - agents may
start their discovery process as soon as they see this bit set
(Component Tag register was used before for this purpose).
2. Enumerator sets Component Tag (!= 0) immediately during device
setup. This allows to identify the device if the redundant route
exists in a RIO system.
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio/rio.h')
| -rw-r--r-- | drivers/rapidio/rio.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h index d249a1205c7d..b1af414f15e6 100644 --- a/drivers/rapidio/rio.h +++ b/drivers/rapidio/rio.h @@ -38,6 +38,7 @@ extern int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, extern int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table); extern int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock); +extern struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from); /* Structures internal to the RIO core code */ extern struct device_attribute rio_dev_attrs[]; |