diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/qp.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/infiniband/hw/hfi1/qp.c b/drivers/infiniband/hw/hfi1/qp.c index 8f66c58b3afb..319e29656766 100644 --- a/drivers/infiniband/hw/hfi1/qp.c +++ b/drivers/infiniband/hw/hfi1/qp.c @@ -79,43 +79,6 @@ static inline unsigned mk_qpn(struct rvt_qpn_table *qpt, return (map - qpt->map) * RVT_BITS_PER_PAGE + off; } -/* - * Convert the AETH credit code into the number of credits. - */ -static const u16 credit_table[31] = { - 0, /* 0 */ - 1, /* 1 */ - 2, /* 2 */ - 3, /* 3 */ - 4, /* 4 */ - 6, /* 5 */ - 8, /* 6 */ - 12, /* 7 */ - 16, /* 8 */ - 24, /* 9 */ - 32, /* A */ - 48, /* B */ - 64, /* C */ - 96, /* D */ - 128, /* E */ - 192, /* F */ - 256, /* 10 */ - 384, /* 11 */ - 512, /* 12 */ - 768, /* 13 */ - 1024, /* 14 */ - 1536, /* 15 */ - 2048, /* 16 */ - 3072, /* 17 */ - 4096, /* 18 */ - 6144, /* 19 */ - 8192, /* 1A */ - 12288, /* 1B */ - 16384, /* 1C */ - 24576, /* 1D */ - 32768 /* 1E */ -}; - const struct rvt_operation_params hfi1_post_parms[RVT_OPERATION_MAX] = { [IB_WR_RDMA_WRITE] = { .length = sizeof(struct ib_rdma_wr), @@ -340,68 +303,6 @@ int hfi1_check_send_wqe(struct rvt_qp *qp, } /** - * hfi1_compute_aeth - compute the AETH (syndrome + MSN) - * @qp: the queue pair to compute the AETH for - * - * Returns the AETH. - */ -__be32 hfi1_compute_aeth(struct rvt_qp *qp) -{ - u32 aeth = qp->r_msn & HFI1_MSN_MASK; - - if (qp->ibqp.srq) { - /* - * Shared receive queues don't generate credits. - * Set the credit field to the invalid value. - */ - aeth |= HFI1_AETH_CREDIT_INVAL << HFI1_AETH_CREDIT_SHIFT; - } else { - u32 min, max, x; - u32 credits; - struct rvt_rwq *wq = qp->r_rq.wq; - u32 head; - u32 tail; - - /* sanity check pointers before trusting them */ - head = wq->head; - if (head >= qp->r_rq.size) - head = 0; - tail = wq->tail; - if (tail >= qp->r_rq.size) - tail = 0; - /* - * Compute the number of credits available (RWQEs). - * There is a small chance that the pair of reads are - * not atomic, which is OK, since the fuzziness is - * resolved as further ACKs go out. - */ - credits = head - tail; - if ((int)credits < 0) - credits += qp->r_rq.size; - /* - * Binary search the credit table to find the code to - * use. - */ - min = 0; - max = 31; - for (;;) { - x = (min + max) / 2; - if (credit_table[x] == credits) - break; - if (credit_table[x] > credits) { - max = x; - } else { - if (min == x) - break; - min = x; - } - } - aeth |= x << HFI1_AETH_CREDIT_SHIFT; - } - return cpu_to_be32(aeth); -} - -/** * _hfi1_schedule_send - schedule progress * @qp: the QP * @@ -457,44 +358,6 @@ void hfi1_schedule_send(struct rvt_qp *qp) _hfi1_schedule_send(qp); } -/** - * hfi1_get_credit - handle credit in aeth - * @qp: the qp - * @aeth: the Acknowledge Extended Transport Header - * - * The QP s_lock should be held. - */ -void hfi1_get_credit(struct rvt_qp *qp, u32 aeth) -{ - u32 credit = (aeth >> HFI1_AETH_CREDIT_SHIFT) & HFI1_AETH_CREDIT_MASK; - - lockdep_assert_held(&qp->s_lock); - /* - * If the credit is invalid, we can send - * as many packets as we like. Otherwise, we have to - * honor the credit field. - */ - if (credit == HFI1_AETH_CREDIT_INVAL) { - if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT)) { - qp->s_flags |= RVT_S_UNLIMITED_CREDIT; - if (qp->s_flags & RVT_S_WAIT_SSN_CREDIT) { - qp->s_flags &= ~RVT_S_WAIT_SSN_CREDIT; - hfi1_schedule_send(qp); - } - } - } else if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT)) { - /* Compute new LSN (i.e., MSN + credit) */ - credit = (aeth + credit_table[credit]) & HFI1_MSN_MASK; - if (cmp_msn(credit, qp->s_lsn) > 0) { - qp->s_lsn = credit; - if (qp->s_flags & RVT_S_WAIT_SSN_CREDIT) { - qp->s_flags &= ~RVT_S_WAIT_SSN_CREDIT; - hfi1_schedule_send(qp); - } - } - } -} - void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag) { unsigned long flags; |