diff options
| author | Krishna Gudipati <kgudipat@brocade.com> | 2011-07-21 04:00:45 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-07-27 14:44:48 +0400 |
| commit | ca6e0ea71cd0f442875b05357dd51774bd84b418 (patch) | |
| tree | d57fc05d9bd1141d1c8a340347bdb28ea20b8e45 /drivers/scsi/bfa/bfa_hw_cb.c | |
| parent | 9afbcfab74d26051702862b57c0115f71477a3cc (diff) | |
| download | linux-ca6e0ea71cd0f442875b05357dd51774bd84b418.tar.xz | |
[SCSI] bfa: Update RME interrupt handling.
- Made changes to always acknowledge RME interrupt and update
consumer index (CI) when RME interrupt is generated.
- Made changes to have ASIC specific hw_rspq_ack() handler.
Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/bfa/bfa_hw_cb.c')
| -rw-r--r-- | drivers/scsi/bfa/bfa_hw_cb.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/scsi/bfa/bfa_hw_cb.c b/drivers/scsi/bfa/bfa_hw_cb.c index e7ffd8205dc7..ea24d4c6e67a 100644 --- a/drivers/scsi/bfa/bfa_hw_cb.c +++ b/drivers/scsi/bfa/bfa_hw_cb.c @@ -42,11 +42,36 @@ bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq) bfa->iocfc.bfa_regs.intr_status); } +/* + * Actions to respond RME Interrupt for Crossbow ASIC: + * - Write 1 to Interrupt Status register + * INTX - done in bfa_intx() + * MSIX - done in bfa_hwcb_rspq_ack_msix() + * - Update CI (only if new CI) + */ static void -bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq) +bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq, u32 ci) { writel(__HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq), - bfa->iocfc.bfa_regs.intr_status); + bfa->iocfc.bfa_regs.intr_status); + + if (bfa_rspq_ci(bfa, rspq) == ci) + return; + + bfa_rspq_ci(bfa, rspq) = ci; + writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]); + mmiowb(); +} + +void +bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci) +{ + if (bfa_rspq_ci(bfa, rspq) == ci) + return; + + bfa_rspq_ci(bfa, rspq) = ci; + writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]); + mmiowb(); } void @@ -149,8 +174,13 @@ bfa_hwcb_msix_uninstall(struct bfa_s *bfa) void bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix) { - bfa->iocfc.hwif.hw_reqq_ack = bfa_hwcb_reqq_ack_msix; - bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix; + if (msix) { + bfa->iocfc.hwif.hw_reqq_ack = bfa_hwcb_reqq_ack_msix; + bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix; + } else { + bfa->iocfc.hwif.hw_reqq_ack = NULL; + bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack; + } } void |