Message ID | 20170315163454.GD29562@obsidianresearch.com (mailing list archive) |
---|---|
State | Changes Requested |
Headers | show |
On Wed, Mar 15, 2017 at 10:04 PM, Jason Gunthorpe <jgunthorpe@obsidianresearch.com> wrote: > On Wed, Mar 15, 2017 at 06:37:28AM -0400, Devesh Sharma wrote: >> + >> + pthread_spin_lock(&dpi->db_lock); >> + *dbval = htole64(*dbval); >> + udma_ordering_write_barrier(); > > The ordering_write_barrier is basically an equivalent barrier to a > spinlock, so this is an unnecessary pattern. > > However, you still always need udma_to_device_barrier before > triggering chip DMA. I will change this in V4. > > There is also no udma_from_device_barrier() in this driver, which > can't be right, please add one around bnxt_re_is_cqe_valid most > likely. Ok, I will put it in next version. > > Your github branch doesn't compile, btw. > > I ran it through sparse, this is what I suggest.. Thanks for the suggestion, I will run sparse and try to fix all of it. > > diff --git a/providers/bnxt_re/bnxt_re-abi.h b/providers/bnxt_re/bnxt_re-abi.h > index 8dbb7b985fa0cd..8fcb2517a23028 100644 > --- a/providers/bnxt_re/bnxt_re-abi.h > +++ b/providers/bnxt_re/bnxt_re-abi.h > @@ -243,7 +243,7 @@ struct bnxt_re_req_cqe { > > struct bnxt_re_rc_cqe { > __u32 length; > - __u32 imm_key; > + __be32 imm_key; > __u64 qp_handle; > __u64 mr_handle; > }; > @@ -282,7 +282,7 @@ struct bnxt_re_bsqe { > }; > > struct bnxt_re_psns { > - __u32 opc_spsn; > + __le32 opc_spsn; > __u32 flg_npsn; > }; > > diff --git a/providers/bnxt_re/verbs.c b/providers/bnxt_re/verbs.c > index dafe55b74aefe8..3e31845b4d6b47 100644 > --- a/providers/bnxt_re/verbs.c > +++ b/providers/bnxt_re/verbs.c > @@ -581,9 +581,10 @@ static int bnxt_re_poll_flush_wcs(struct bnxt_re_queue *que, > wrid = &wridp[head]; > if (wrid->psns) { > psns = wrid->psns; > - opcode = (psns->opc_spsn >> BNXT_RE_PSNS_OPCD_SHIFT) & > - BNXT_RE_PSNS_OPCD_MASK; > - } > + opcode = (le32toh(psns->opc_spsn) >> > + BNXT_RE_PSNS_OPCD_SHIFT) & > + BNXT_RE_PSNS_OPCD_MASK; > + } > > ibvwc->status = IBV_WC_WR_FLUSH_ERR; > ibvwc->opcode = opcode; > @@ -1032,10 +1033,11 @@ static void bnxt_re_fill_psns(struct bnxt_re_qp *qp, struct bnxt_re_psns *psns, > uint8_t opcode, uint32_t len) > { > uint32_t pkt_cnt = 0, nxt_psn; > + uint32_t opc_spsn = 0; > > memset(psns, 0, sizeof(*psns)); > if (qp->qptyp == IBV_QPT_RC) { > - psns->opc_spsn = qp->sq_psn & BNXT_RE_PSNS_SPSN_MASK; > + opc_spsn = qp->sq_psn & BNXT_RE_PSNS_SPSN_MASK; > pkt_cnt = (len / qp->mtu); > if (len % qp->mtu) > pkt_cnt++; > @@ -1044,9 +1046,9 @@ static void bnxt_re_fill_psns(struct bnxt_re_qp *qp, struct bnxt_re_psns *psns, > qp->sq_psn = nxt_psn; > } > opcode = bnxt_re_ibv_wr_to_wc_opcd(opcode); > - psns->opc_spsn |= ((opcode & BNXT_RE_PSNS_OPCD_MASK) << > - BNXT_RE_PSNS_OPCD_SHIFT); > - *(uint64_t *)psns = htole64(*(uint64_t *)psns); > + opc_spsn |= > + ((opcode & BNXT_RE_PSNS_OPCD_MASK) << BNXT_RE_PSNS_OPCD_SHIFT); > + psns->opc_spsn = htole32(opc_spsn); > } > > static void bnxt_re_fill_wrid(struct bnxt_re_wrid *wrid, struct ibv_send_wr *wr, -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, Mar 16, 2017 at 08:34:12AM +0530, Devesh Sharma wrote: > > Your github branch doesn't compile, btw. > > > > I ran it through sparse, this is what I suggest.. > > Thanks for the suggestion, I will run sparse and try to fix all of it. You will need my sparse branch to do this: https://github.com/linux-rdma/rdma-core/pull/100 There were a few places still producing warnings, at least two should be fixed with __force You should make a PR for this once you get Leon's changes and rebase it the current master. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Okay, I will get it done. On Thu, Mar 16, 2017 at 9:47 PM, Jason Gunthorpe <jgunthorpe@obsidianresearch.com> wrote: > On Thu, Mar 16, 2017 at 08:34:12AM +0530, Devesh Sharma wrote: > >> > Your github branch doesn't compile, btw. >> > >> > I ran it through sparse, this is what I suggest.. >> >> Thanks for the suggestion, I will run sparse and try to fix all of it. > > You will need my sparse branch to do this: > > https://github.com/linux-rdma/rdma-core/pull/100 > > There were a few places still producing warnings, at least two should > be fixed with __force > > You should make a PR for this once you get Leon's changes and rebase > it the current master. > > Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/providers/bnxt_re/bnxt_re-abi.h b/providers/bnxt_re/bnxt_re-abi.h index 8dbb7b985fa0cd..8fcb2517a23028 100644 --- a/providers/bnxt_re/bnxt_re-abi.h +++ b/providers/bnxt_re/bnxt_re-abi.h @@ -243,7 +243,7 @@ struct bnxt_re_req_cqe { struct bnxt_re_rc_cqe { __u32 length; - __u32 imm_key; + __be32 imm_key; __u64 qp_handle; __u64 mr_handle; }; @@ -282,7 +282,7 @@ struct bnxt_re_bsqe { }; struct bnxt_re_psns { - __u32 opc_spsn; + __le32 opc_spsn; __u32 flg_npsn; }; diff --git a/providers/bnxt_re/verbs.c b/providers/bnxt_re/verbs.c index dafe55b74aefe8..3e31845b4d6b47 100644 --- a/providers/bnxt_re/verbs.c +++ b/providers/bnxt_re/verbs.c @@ -581,9 +581,10 @@ static int bnxt_re_poll_flush_wcs(struct bnxt_re_queue *que, wrid = &wridp[head]; if (wrid->psns) { psns = wrid->psns; - opcode = (psns->opc_spsn >> BNXT_RE_PSNS_OPCD_SHIFT) & - BNXT_RE_PSNS_OPCD_MASK; - } + opcode = (le32toh(psns->opc_spsn) >> + BNXT_RE_PSNS_OPCD_SHIFT) & + BNXT_RE_PSNS_OPCD_MASK; + } ibvwc->status = IBV_WC_WR_FLUSH_ERR; ibvwc->opcode = opcode; @@ -1032,10 +1033,11 @@ static void bnxt_re_fill_psns(struct bnxt_re_qp *qp, struct bnxt_re_psns *psns, uint8_t opcode, uint32_t len) { uint32_t pkt_cnt = 0, nxt_psn; + uint32_t opc_spsn = 0; memset(psns, 0, sizeof(*psns)); if (qp->qptyp == IBV_QPT_RC) { - psns->opc_spsn = qp->sq_psn & BNXT_RE_PSNS_SPSN_MASK; + opc_spsn = qp->sq_psn & BNXT_RE_PSNS_SPSN_MASK; pkt_cnt = (len / qp->mtu); if (len % qp->mtu) pkt_cnt++; @@ -1044,9 +1046,9 @@ static void bnxt_re_fill_psns(struct bnxt_re_qp *qp, struct bnxt_re_psns *psns, qp->sq_psn = nxt_psn; } opcode = bnxt_re_ibv_wr_to_wc_opcd(opcode); - psns->opc_spsn |= ((opcode & BNXT_RE_PSNS_OPCD_MASK) << - BNXT_RE_PSNS_OPCD_SHIFT); - *(uint64_t *)psns = htole64(*(uint64_t *)psns); + opc_spsn |= + ((opcode & BNXT_RE_PSNS_OPCD_MASK) << BNXT_RE_PSNS_OPCD_SHIFT); + psns->opc_spsn = htole32(opc_spsn); } static void bnxt_re_fill_wrid(struct bnxt_re_wrid *wrid, struct ibv_send_wr *wr,