diff options
| author | John Gregor <john.gregor@qlogic.com> | 2008-04-16 21:09:24 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-04-16 21:09:24 -0700 |
| commit | 58411d1c012dca53ec9107bd98acb63f648e2435 (patch) | |
| tree | d48edc5c3c64d91311bb4134b83bfe7b62b10ec4 /drivers/infiniband/hw/ipath/ipath_registers.h | |
| parent | 6be979d71a5e8720c8560cc58713407947e5f691 (diff) | |
IB/ipath: Head of Line blocking vs forward progress of user apps
There's a conflict between our need to quiesce PSM-based applications
to avoid HoL blocking when the IB link goes down and the apps' desire
to remain running so that their quiescence timout mechanism can keep
running.
The compromise is to STOP the processes for a fixed period of time and
then alternate between CONT and STOP until the link is again active.
If there are poor interactions with subnet manager configuration at a
given site, the interval can be adjusted via a module paramter.
Signed-off-by: John Gregor <john.gregor@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_registers.h')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_registers.h | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_registers.h b/drivers/infiniband/hw/ipath/ipath_registers.h index cb19ea26083..16d0d74f1dd 100644 --- a/drivers/infiniband/hw/ipath/ipath_registers.h +++ b/drivers/infiniband/hw/ipath/ipath_registers.h @@ -200,7 +200,6 @@ #define INFINIPATH_IBCC_LINKDOWNDEFAULTSTATE 0x4000000000000000ULL /* kr_ibcstatus bits */ -#define INFINIPATH_IBCS_LINKTRAININGSTATE_MASK 0xF #define INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT 0 #define INFINIPATH_IBCS_LINKSTATE_MASK 0x7 #define INFINIPATH_IBCS_LINKSTATE_SHIFT 4 @@ -221,30 +220,13 @@ #define INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN 0x0c #define INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT 0x0e #define INFINIPATH_IBCS_LT_STATE_RECOVERIDLE 0x0f -/* link state machine states (shift by INFINIPATH_IBCS_LINKSTATE_SHIFT) */ +/* link state machine states (shift by ibcs_ls_shift) */ #define INFINIPATH_IBCS_L_STATE_DOWN 0x0 #define INFINIPATH_IBCS_L_STATE_INIT 0x1 #define INFINIPATH_IBCS_L_STATE_ARM 0x2 #define INFINIPATH_IBCS_L_STATE_ACTIVE 0x3 #define INFINIPATH_IBCS_L_STATE_ACT_DEFER 0x4 -/* combination link status states that we use with some frequency */ -#define IPATH_IBSTATE_MASK ((INFINIPATH_IBCS_LINKTRAININGSTATE_MASK \ - << INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) | \ - (INFINIPATH_IBCS_LINKSTATE_MASK \ - <<INFINIPATH_IBCS_LINKSTATE_SHIFT)) -#define IPATH_IBSTATE_INIT ((INFINIPATH_IBCS_L_STATE_INIT \ - << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \ - (INFINIPATH_IBCS_LT_STATE_LINKUP \ - <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT)) -#define IPATH_IBSTATE_ARM ((INFINIPATH_IBCS_L_STATE_ARM \ - << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \ - (INFINIPATH_IBCS_LT_STATE_LINKUP \ - <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT)) -#define IPATH_IBSTATE_ACTIVE ((INFINIPATH_IBCS_L_STATE_ACTIVE \ - << INFINIPATH_IBCS_LINKSTATE_SHIFT) | \ - (INFINIPATH_IBCS_LT_STATE_LINKUP \ - <<INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT)) /* kr_extstatus bits */ #define INFINIPATH_EXTS_SERDESPLLLOCK 0x1 |