diff options
Diffstat (limited to 'drivers/infiniband/sw/siw/siw_qp.c')
-rw-r--r-- | drivers/infiniband/sw/siw/siw_qp.c | 271 |
1 files changed, 142 insertions, 129 deletions
diff --git a/drivers/infiniband/sw/siw/siw_qp.c b/drivers/infiniband/sw/siw/siw_qp.c index b4317480cee7..5927ac5923dd 100644 --- a/drivers/infiniband/sw/siw/siw_qp.c +++ b/drivers/infiniband/sw/siw/siw_qp.c @@ -199,26 +199,26 @@ void siw_qp_llp_write_space(struct sock *sk) static int siw_qp_readq_init(struct siw_qp *qp, int irq_size, int orq_size) { - irq_size = roundup_pow_of_two(irq_size); - orq_size = roundup_pow_of_two(orq_size); - - qp->attrs.irq_size = irq_size; - qp->attrs.orq_size = orq_size; - - qp->irq = vzalloc(irq_size * sizeof(struct siw_sqe)); - if (!qp->irq) { - siw_dbg_qp(qp, "irq malloc for %d failed\n", irq_size); - qp->attrs.irq_size = 0; - return -ENOMEM; + if (irq_size) { + irq_size = roundup_pow_of_two(irq_size); + qp->irq = vzalloc(irq_size * sizeof(struct siw_sqe)); + if (!qp->irq) { + qp->attrs.irq_size = 0; + return -ENOMEM; + } } - qp->orq = vzalloc(orq_size * sizeof(struct siw_sqe)); - if (!qp->orq) { - siw_dbg_qp(qp, "orq malloc for %d failed\n", orq_size); - qp->attrs.orq_size = 0; - qp->attrs.irq_size = 0; - vfree(qp->irq); - return -ENOMEM; + if (orq_size) { + orq_size = roundup_pow_of_two(orq_size); + qp->orq = vzalloc(orq_size * sizeof(struct siw_sqe)); + if (!qp->orq) { + qp->attrs.orq_size = 0; + qp->attrs.irq_size = 0; + vfree(qp->irq); + return -ENOMEM; + } } + qp->attrs.irq_size = irq_size; + qp->attrs.orq_size = orq_size; siw_dbg_qp(qp, "ORD %d, IRD %d\n", orq_size, irq_size); return 0; } @@ -288,13 +288,14 @@ int siw_qp_mpa_rts(struct siw_qp *qp, enum mpa_v2_ctrl ctrl) if (ctrl & MPA_V2_RDMA_WRITE_RTR) wqe->sqe.opcode = SIW_OP_WRITE; else if (ctrl & MPA_V2_RDMA_READ_RTR) { - struct siw_sqe *rreq; + struct siw_sqe *rreq = NULL; wqe->sqe.opcode = SIW_OP_READ; spin_lock(&qp->orq_lock); - rreq = orq_get_free(qp); + if (qp->attrs.orq_size) + rreq = orq_get_free(qp); if (rreq) { siw_read_to_orq(rreq, &wqe->sqe); qp->orq_put++; @@ -877,135 +878,88 @@ void siw_read_to_orq(struct siw_sqe *rreq, struct siw_sqe *sqe) rreq->num_sge = 1; } -/* - * Must be called with SQ locked. - * To avoid complete SQ starvation by constant inbound READ requests, - * the active IRQ will not be served after qp->irq_burst, if the - * SQ has pending work. - */ -int siw_activate_tx(struct siw_qp *qp) +static int siw_activate_tx_from_sq(struct siw_qp *qp) { - struct siw_sqe *irqe, *sqe; + struct siw_sqe *sqe; struct siw_wqe *wqe = tx_wqe(qp); int rv = 1; - irqe = &qp->irq[qp->irq_get % qp->attrs.irq_size]; - - if (irqe->flags & SIW_WQE_VALID) { - sqe = sq_get_next(qp); - - /* - * Avoid local WQE processing starvation in case - * of constant inbound READ request stream - */ - if (sqe && ++qp->irq_burst >= SIW_IRQ_MAXBURST_SQ_ACTIVE) { - qp->irq_burst = 0; - goto skip_irq; - } - memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); - wqe->wr_status = SIW_WR_QUEUED; - - /* start READ RESPONSE */ - wqe->sqe.opcode = SIW_OP_READ_RESPONSE; - wqe->sqe.flags = 0; - if (irqe->num_sge) { - wqe->sqe.num_sge = 1; - wqe->sqe.sge[0].length = irqe->sge[0].length; - wqe->sqe.sge[0].laddr = irqe->sge[0].laddr; - wqe->sqe.sge[0].lkey = irqe->sge[0].lkey; - } else { - wqe->sqe.num_sge = 0; - } - - /* Retain original RREQ's message sequence number for - * potential error reporting cases. - */ - wqe->sqe.sge[1].length = irqe->sge[1].length; - - wqe->sqe.rkey = irqe->rkey; - wqe->sqe.raddr = irqe->raddr; + sqe = sq_get_next(qp); + if (!sqe) + return 0; - wqe->processed = 0; - qp->irq_get++; + memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); + wqe->wr_status = SIW_WR_QUEUED; - /* mark current IRQ entry free */ - smp_store_mb(irqe->flags, 0); + /* First copy SQE to kernel private memory */ + memcpy(&wqe->sqe, sqe, sizeof(*sqe)); + if (wqe->sqe.opcode >= SIW_NUM_OPCODES) { + rv = -EINVAL; goto out; } - sqe = sq_get_next(qp); - if (sqe) { -skip_irq: - memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); - wqe->wr_status = SIW_WR_QUEUED; - - /* First copy SQE to kernel private memory */ - memcpy(&wqe->sqe, sqe, sizeof(*sqe)); - - if (wqe->sqe.opcode >= SIW_NUM_OPCODES) { + if (wqe->sqe.flags & SIW_WQE_INLINE) { + if (wqe->sqe.opcode != SIW_OP_SEND && + wqe->sqe.opcode != SIW_OP_WRITE) { rv = -EINVAL; goto out; } - if (wqe->sqe.flags & SIW_WQE_INLINE) { - if (wqe->sqe.opcode != SIW_OP_SEND && - wqe->sqe.opcode != SIW_OP_WRITE) { - rv = -EINVAL; - goto out; - } - if (wqe->sqe.sge[0].length > SIW_MAX_INLINE) { - rv = -EINVAL; - goto out; - } - wqe->sqe.sge[0].laddr = (uintptr_t)&wqe->sqe.sge[1]; - wqe->sqe.sge[0].lkey = 0; - wqe->sqe.num_sge = 1; + if (wqe->sqe.sge[0].length > SIW_MAX_INLINE) { + rv = -EINVAL; + goto out; } - if (wqe->sqe.flags & SIW_WQE_READ_FENCE) { - /* A READ cannot be fenced */ - if (unlikely(wqe->sqe.opcode == SIW_OP_READ || - wqe->sqe.opcode == - SIW_OP_READ_LOCAL_INV)) { - siw_dbg_qp(qp, "cannot fence read\n"); - rv = -EINVAL; - goto out; - } - spin_lock(&qp->orq_lock); + wqe->sqe.sge[0].laddr = (uintptr_t)&wqe->sqe.sge[1]; + wqe->sqe.sge[0].lkey = 0; + wqe->sqe.num_sge = 1; + } + if (wqe->sqe.flags & SIW_WQE_READ_FENCE) { + /* A READ cannot be fenced */ + if (unlikely(wqe->sqe.opcode == SIW_OP_READ || + wqe->sqe.opcode == + SIW_OP_READ_LOCAL_INV)) { + siw_dbg_qp(qp, "cannot fence read\n"); + rv = -EINVAL; + goto out; + } + spin_lock(&qp->orq_lock); - if (!siw_orq_empty(qp)) { - qp->tx_ctx.orq_fence = 1; - rv = 0; - } - spin_unlock(&qp->orq_lock); + if (qp->attrs.orq_size && !siw_orq_empty(qp)) { + qp->tx_ctx.orq_fence = 1; + rv = 0; + } + spin_unlock(&qp->orq_lock); - } else if (wqe->sqe.opcode == SIW_OP_READ || - wqe->sqe.opcode == SIW_OP_READ_LOCAL_INV) { - struct siw_sqe *rreq; + } else if (wqe->sqe.opcode == SIW_OP_READ || + wqe->sqe.opcode == SIW_OP_READ_LOCAL_INV) { + struct siw_sqe *rreq; - wqe->sqe.num_sge = 1; + if (unlikely(!qp->attrs.orq_size)) { + /* We negotiated not to send READ req's */ + rv = -EINVAL; + goto out; + } + wqe->sqe.num_sge = 1; - spin_lock(&qp->orq_lock); + spin_lock(&qp->orq_lock); - rreq = orq_get_free(qp); - if (rreq) { - /* - * Make an immediate copy in ORQ to be ready - * to process loopback READ reply - */ - siw_read_to_orq(rreq, &wqe->sqe); - qp->orq_put++; - } else { - qp->tx_ctx.orq_fence = 1; - rv = 0; - } - spin_unlock(&qp->orq_lock); + rreq = orq_get_free(qp); + if (rreq) { + /* + * Make an immediate copy in ORQ to be ready + * to process loopback READ reply + */ + siw_read_to_orq(rreq, &wqe->sqe); + qp->orq_put++; + } else { + qp->tx_ctx.orq_fence = 1; + rv = 0; } - - /* Clear SQE, can be re-used by application */ - smp_store_mb(sqe->flags, 0); - qp->sq_get++; - } else { - rv = 0; + spin_unlock(&qp->orq_lock); } + + /* Clear SQE, can be re-used by application */ + smp_store_mb(sqe->flags, 0); + qp->sq_get++; out: if (unlikely(rv < 0)) { siw_dbg_qp(qp, "error %d\n", rv); @@ -1015,6 +969,65 @@ out: } /* + * Must be called with SQ locked. + * To avoid complete SQ starvation by constant inbound READ requests, + * the active IRQ will not be served after qp->irq_burst, if the + * SQ has pending work. + */ +int siw_activate_tx(struct siw_qp *qp) +{ + struct siw_sqe *irqe; + struct siw_wqe *wqe = tx_wqe(qp); + + if (!qp->attrs.irq_size) + return siw_activate_tx_from_sq(qp); + + irqe = &qp->irq[qp->irq_get % qp->attrs.irq_size]; + + if (!(irqe->flags & SIW_WQE_VALID)) + return siw_activate_tx_from_sq(qp); + + /* + * Avoid local WQE processing starvation in case + * of constant inbound READ request stream + */ + if (sq_get_next(qp) && ++qp->irq_burst >= SIW_IRQ_MAXBURST_SQ_ACTIVE) { + qp->irq_burst = 0; + return siw_activate_tx_from_sq(qp); + } + memset(wqe->mem, 0, sizeof(*wqe->mem) * SIW_MAX_SGE); + wqe->wr_status = SIW_WR_QUEUED; + + /* start READ RESPONSE */ + wqe->sqe.opcode = SIW_OP_READ_RESPONSE; + wqe->sqe.flags = 0; + if (irqe->num_sge) { + wqe->sqe.num_sge = 1; + wqe->sqe.sge[0].length = irqe->sge[0].length; + wqe->sqe.sge[0].laddr = irqe->sge[0].laddr; + wqe->sqe.sge[0].lkey = irqe->sge[0].lkey; + } else { + wqe->sqe.num_sge = 0; + } + + /* Retain original RREQ's message sequence number for + * potential error reporting cases. + */ + wqe->sqe.sge[1].length = irqe->sge[1].length; + + wqe->sqe.rkey = irqe->rkey; + wqe->sqe.raddr = irqe->raddr; + + wqe->processed = 0; + qp->irq_get++; + + /* mark current IRQ entry free */ + smp_store_mb(irqe->flags, 0); + + return 1; +} + +/* * Check if current CQ state qualifies for calling CQ completion * handler. Must be called with CQ lock held. */ |