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authorAlexandre Bounine <alexandre.bounine@idt.com>2010-10-28 02:34:34 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-28 05:03:16 +0400
commitaf84ca38aff94061dd0711edbb99b0900a9c28fd (patch)
tree31f51e9106c0a0944ec168dc25399f12ab2fa527 /drivers/rapidio/rio.h
parenta3725c45c114bd06e091802f90533332d1e93819 (diff)
downloadlinux-af84ca38aff94061dd0711edbb99b0900a9c28fd.tar.xz
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.h1
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[];