[PATCH][26/27] IB/mthca: update receive queue initialization for new HCAs

Roland Dreier
2005-04-01T21:15:44Z

Update initialization of receive queue to match new documentation.
This change is required to support new MT25204 HCA.

Signed-off-by: Roland Dreier <roland@topspin.com>

--- linux-export.orig/drivers/infiniband/hw/mthca/mthca_qp.c 2005-04-01 12:38:31.673085325 -0800
+++ linux-export/drivers/infiniband/hw/mthca/mthca_qp.c 2005-04-01 12:38:32.124987229 -0800
@@ -181,6 +181,10 @@
MTHCA_MLX_SLR = 1 << 16
};

+enum {
+ MTHCA_INVAL_LKEY = 0x100
+};
+
struct mthca_next_seg {
u32 nda_op; /* [31:6] next WQE [4:0] next opcode */
u32 ee_nds; /* [31:8] next EE [7] DBD [6] F [5:0] next WQE size */
@@ -1093,7 +1097,6 @@
enum ib_sig_type send_policy,
struct mthca_qp *qp)
{
- struct mthca_next_seg *wqe;
int ret;
int i;

@@ -1116,18 +1119,28 @@
}

if (mthca_is_memfree(dev)) {
+ struct mthca_next_seg *next;
+ struct mthca_data_seg *scatter;
+ int size = (sizeof (struct mthca_next_seg) +
+ qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16;
+
for (i = 0; i < qp->rq.max; ++i) {
- wqe = get_recv_wqe(qp, i);
- wqe->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) <<
- qp->rq.wqe_shift);
- wqe->ee_nds = cpu_to_be32(1 << (qp->rq.wqe_shift - 4));
+ next = get_recv_wqe(qp, i);
+ next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) <<
+ qp->rq.wqe_shift);
+ next->ee_nds = cpu_to_be32(size);
+
+ for (scatter = (void *) (next + 1);
+ (void *) scatter < (void *) next + (1 << qp->rq.wqe_shift);
+ ++scatter)
+ scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
}

for (i = 0; i < qp->sq.max; ++i) {
- wqe = get_send_wqe(qp, i);
- wqe->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) <<
- qp->sq.wqe_shift) +
- qp->send_wqe_offset);
+ next = get_send_wqe(qp, i);
+ next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) <<
+ qp->sq.wqe_shift) +
+ qp->send_wqe_offset);
}
}

@@ -1986,7 +1999,7 @@

if (i < qp->rq.max_gs) {
((struct mthca_data_seg *) wqe)->byte_count = 0;
- ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(0x100);
+ ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
((struct mthca_data_seg *) wqe)->addr = 0;
}