From: Krishna Gudipati <kgudipat@xxxxxxxxxxx>
Change details:
- Fixed the issue of not acknowledging the command queue full-to-non-full interrupt.
Implemented separate acknowledging functions for different ASIC and interrupt mode.
- Fixed the case of missing CPE interrupt by always processing the pending requests
in the completion path.
Signed-off-by: Krishna Gudipati <kgudipat@xxxxxxxxxxx>
---
drivers/scsi/bfa/bfa_hw_cb.c | 13 ++++++++
drivers/scsi/bfa/bfa_hw_ct.c | 9 +++++
drivers/scsi/bfa/bfa_intr.c | 71 +++++++++++++++++++++++++++--------------
drivers/scsi/bfa/bfa_iocfc.c | 2 +
drivers/scsi/bfa/bfa_iocfc.h | 3 ++
5 files changed, 74 insertions(+), 24 deletions(-)
diff --git a/drivers/scsi/bfa/bfa_hw_cb.c b/drivers/scsi/bfa/bfa_hw_cb.c
index ede1438..871a4e2 100644
--- a/drivers/scsi/bfa/bfa_hw_cb.c
+++ b/drivers/scsi/bfa/bfa_hw_cb.c
@@ -53,6 +53,18 @@ bfa_hwcb_reginit(struct bfa_s *bfa)
}
void
+bfa_hwcb_reqq_ack(struct bfa_s *bfa, int reqq)
+{
+}
+
+static void
+bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq)
+{
+ bfa_reg_write(bfa->iocfc.bfa_regs.intr_status,
+ __HFN_INT_CPE_Q0 << CPE_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), reqq));
+}
+
+void
bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq)
{
}
@@ -136,6 +148,7 @@ 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;
}
diff --git a/drivers/scsi/bfa/bfa_hw_ct.c b/drivers/scsi/bfa/bfa_hw_ct.c
index 51ae574..76ceb9a 100644
--- a/drivers/scsi/bfa/bfa_hw_ct.c
+++ b/drivers/scsi/bfa/bfa_hw_ct.c
@@ -85,6 +85,15 @@ bfa_hwct_reginit(struct bfa_s *bfa)
}
void
+bfa_hwct_reqq_ack(struct bfa_s *bfa, int reqq)
+{
+ u32 r32;
+
+ r32 = bfa_reg_read(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
+ bfa_reg_write(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq], r32);
+}
+
+void
bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq)
{
u32 r32;
diff --git a/drivers/scsi/bfa/bfa_intr.c b/drivers/scsi/bfa/bfa_intr.c
index c422546..0eba3f9 100644
--- a/drivers/scsi/bfa/bfa_intr.c
+++ b/drivers/scsi/bfa/bfa_intr.c
@@ -34,6 +34,26 @@ bfa_msix_lpu(struct bfa_s *bfa)
bfa_ioc_mbox_isr(&bfa->ioc);
}
+static void
+bfa_reqq_resume(struct bfa_s *bfa, int qid)
+{
+ struct list_head *waitq, *qe, *qen;
+ struct bfa_reqq_wait_s *wqe;
+
+ waitq = bfa_reqq(bfa, qid);
+ list_for_each_safe(qe, qen, waitq) {
+ /**
+ * Callback only as long as there is room in request queue
+ */
+ if (bfa_reqq_full(bfa, qid))
+ break;
+
+ list_del(qe);
+ wqe = (struct bfa_reqq_wait_s *) qe;
+ wqe->qresume(wqe->cbarg);
+ }
+}
+
void
bfa_msix_all(struct bfa_s *bfa, int vec)
{
@@ -128,23 +148,18 @@ bfa_isr_disable(struct bfa_s *bfa)
void
bfa_msix_reqq(struct bfa_s *bfa, int qid)
{
- struct list_head *waitq, *qe, *qen;
- struct bfa_reqq_wait_s *wqe;
+ struct list_head *waitq;
qid &= (BFI_IOC_MAX_CQS - 1);
- waitq = bfa_reqq(bfa, qid);
- list_for_each_safe(qe, qen, waitq) {
- /**
- * Callback only as long as there is room in request queue
- */
- if (bfa_reqq_full(bfa, qid))
- break;
+ bfa->iocfc.hwif.hw_reqq_ack(bfa, qid);
- list_del(qe);
- wqe = (struct bfa_reqq_wait_s *) qe;
- wqe->qresume(wqe->cbarg);
- }
+ /**
+ * Resume any pending requests in the corresponding reqq.
+ */
+ waitq = bfa_reqq(bfa, qid);
+ if (!list_empty(waitq))
+ bfa_reqq_resume(bfa, qid);
}
void
@@ -158,26 +173,27 @@ bfa_isr_unhandled(struct bfa_s *bfa, struct bfi_msg_s *m)
}
void
-bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
+bfa_msix_rspq(struct bfa_s *bfa, int qid)
{
- struct bfi_msg_s *m;
- u32 pi, ci;
+ struct bfi_msg_s *m;
+ u32 pi, ci;
+ struct list_head *waitq;
- bfa_trc_fp(bfa, rsp_qid);
+ bfa_trc_fp(bfa, qid);
- rsp_qid &= (BFI_IOC_MAX_CQS - 1);
+ qid &= (BFI_IOC_MAX_CQS - 1);
- bfa->iocfc.hwif.hw_rspq_ack(bfa, rsp_qid);
+ bfa->iocfc.hwif.hw_rspq_ack(bfa, qid);
- ci = bfa_rspq_ci(bfa, rsp_qid);
- pi = bfa_rspq_pi(bfa, rsp_qid);
+ ci = bfa_rspq_ci(bfa, qid);
+ pi = bfa_rspq_pi(bfa, qid);
bfa_trc_fp(bfa, ci);
bfa_trc_fp(bfa, pi);
if (bfa->rme_process) {
while (ci != pi) {
- m = bfa_rspq_elem(bfa, rsp_qid, ci);
+ m = bfa_rspq_elem(bfa, qid, ci);
bfa_assert_fp(m->mhdr.msg_class < BFI_MC_MAX);
bfa_isrs[m->mhdr.msg_class] (bfa, m);
@@ -189,9 +205,16 @@ bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
/**
* update CI
*/
- bfa_rspq_ci(bfa, rsp_qid) = pi;
- bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[rsp_qid], pi);
+ bfa_rspq_ci(bfa, qid) = pi;
+ bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[qid], pi);
bfa_os_mmiowb();
+
+ /**
+ * Resume any pending requests in the corresponding reqq.
+ */
+ waitq = bfa_reqq(bfa, qid);
+ if (!list_empty(waitq))
+ bfa_reqq_resume(bfa, qid);
}
void
diff --git a/drivers/scsi/bfa/bfa_iocfc.c b/drivers/scsi/bfa/bfa_iocfc.c
index 137591c..a5551db 100644
--- a/drivers/scsi/bfa/bfa_iocfc.c
+++ b/drivers/scsi/bfa/bfa_iocfc.c
@@ -172,6 +172,7 @@ bfa_iocfc_init_mem(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
*/
if (bfa_ioc_devid(&bfa->ioc) == BFA_PCI_DEVICE_ID_CT) {
iocfc->hwif.hw_reginit = bfa_hwct_reginit;
+ iocfc->hwif.hw_reqq_ack = bfa_hwct_reqq_ack;
iocfc->hwif.hw_rspq_ack = bfa_hwct_rspq_ack;
iocfc->hwif.hw_msix_init = bfa_hwct_msix_init;
iocfc->hwif.hw_msix_install = bfa_hwct_msix_install;
@@ -180,6 +181,7 @@ bfa_iocfc_init_mem(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
iocfc->hwif.hw_msix_getvecs = bfa_hwct_msix_getvecs;
} else {
iocfc->hwif.hw_reginit = bfa_hwcb_reginit;
+ iocfc->hwif.hw_reqq_ack = bfa_hwcb_reqq_ack;
iocfc->hwif.hw_rspq_ack = bfa_hwcb_rspq_ack;
iocfc->hwif.hw_msix_init = bfa_hwcb_msix_init;
iocfc->hwif.hw_msix_install = bfa_hwcb_msix_install;
diff --git a/drivers/scsi/bfa/bfa_iocfc.h b/drivers/scsi/bfa/bfa_iocfc.h
index ce9a830..fbb4bdc 100644
--- a/drivers/scsi/bfa/bfa_iocfc.h
+++ b/drivers/scsi/bfa/bfa_iocfc.h
@@ -54,6 +54,7 @@ struct bfa_msix_s {
*/
struct bfa_hwif_s {
void (*hw_reginit)(struct bfa_s *bfa);
+ void (*hw_reqq_ack)(struct bfa_s *bfa, int reqq);
void (*hw_rspq_ack)(struct bfa_s *bfa, int rspq);
void (*hw_msix_init)(struct bfa_s *bfa, int nvecs);
void (*hw_msix_install)(struct bfa_s *bfa);
@@ -143,6 +144,7 @@ void bfa_msix_rspq(struct bfa_s *bfa, int vec);
void bfa_msix_lpu_err(struct bfa_s *bfa, int vec);
void bfa_hwcb_reginit(struct bfa_s *bfa);
+void bfa_hwcb_reqq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs);
void bfa_hwcb_msix_install(struct bfa_s *bfa);
@@ -151,6 +153,7 @@ void bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix);
void bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *vecmap,
u32 *nvecs, u32 *maxvec);
void bfa_hwct_reginit(struct bfa_s *bfa);
+void bfa_hwct_reqq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq);
void bfa_hwct_msix_init(struct bfa_s *bfa, int nvecs);
void bfa_hwct_msix_install(struct bfa_s *bfa);
--
1.6.5.3
--
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