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Diffstat (limited to 'drivers/infiniband/hw/hfi1/qp.c')
-rw-r--r--drivers/infiniband/hw/hfi1/qp.c137
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;