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[PATCH] IB uverbs: add mthca user QP support

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Add support for userspace queue pairs (QPs) to mthca.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland Dreier
2005-07-07 17:57:20 -07:00
committed by Linus Torvalds
parent 74c2174e7b
commit 80c8ec2c04
3 changed files with 212 additions and 85 deletions
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80
drivers/infiniband/hw/mthca/mthca_provider.c
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@@ -424,6 +424,7 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata)
{
struct mthca_create_qp ucmd;
struct mthca_qp *qp;
int err;
@@ -432,41 +433,82 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
case IB_QPT_UC:
case IB_QPT_UD:
{
struct mthca_ucontext *context;
qp = kmalloc(sizeof *qp, GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->sq.max = init_attr->cap.max_send_wr;
qp->rq.max = init_attr->cap.max_recv_wr;
qp->sq.max_gs = init_attr->cap.max_send_sge;
qp->rq.max_gs = init_attr->cap.max_recv_sge;
if (pd->uobject) {
context = to_mucontext(pd->uobject->context);
if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
return ERR_PTR(-EFAULT);
err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
context->db_tab,
ucmd.sq_db_index, ucmd.sq_db_page);
if (err) {
kfree(qp);
return ERR_PTR(err);
}
err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
context->db_tab,
ucmd.rq_db_index, ucmd.rq_db_page);
if (err) {
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.sq_db_index);
kfree(qp);
return ERR_PTR(err);
}
qp->mr.ibmr.lkey = ucmd.lkey;
qp->sq.db_index = ucmd.sq_db_index;
qp->rq.db_index = ucmd.rq_db_index;
}
err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
to_mcq(init_attr->send_cq),
to_mcq(init_attr->recv_cq),
init_attr->qp_type, init_attr->sq_sig_type,
qp);
&init_attr->cap, qp);
if (err && pd->uobject) {
context = to_mucontext(pd->uobject->context);
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.sq_db_index);
mthca_unmap_user_db(to_mdev(pd->device),
&context->uar,
context->db_tab,
ucmd.rq_db_index);
}
qp->ibqp.qp_num = qp->qpn;
break;
}
case IB_QPT_SMI:
case IB_QPT_GSI:
{
/* Don't allow userspace to create special QPs */
if (pd->uobject)
return ERR_PTR(-EINVAL);
qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
qp->sq.max = init_attr->cap.max_send_wr;
qp->rq.max = init_attr->cap.max_recv_wr;
qp->sq.max_gs = init_attr->cap.max_send_sge;
qp->rq.max_gs = init_attr->cap.max_recv_sge;
qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
to_mcq(init_attr->send_cq),
to_mcq(init_attr->recv_cq),
init_attr->sq_sig_type,
init_attr->sq_sig_type, &init_attr->cap,
qp->ibqp.qp_num, init_attr->port_num,
to_msqp(qp));
break;
@@ -481,13 +523,27 @@ static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
return ERR_PTR(err);
}
init_attr->cap.max_inline_data = 0;
init_attr->cap.max_inline_data = 0;
init_attr->cap.max_send_wr = qp->sq.max;
init_attr->cap.max_recv_wr = qp->rq.max;
init_attr->cap.max_send_sge = qp->sq.max_gs;
init_attr->cap.max_recv_sge = qp->rq.max_gs;
return &qp->ibqp;
}
static int mthca_destroy_qp(struct ib_qp *qp)
{
if (qp->uobject) {
mthca_unmap_user_db(to_mdev(qp->device),
&to_mucontext(qp->uobject->context)->uar,
to_mucontext(qp->uobject->context)->db_tab,
to_mqp(qp)->sq.db_index);
mthca_unmap_user_db(to_mdev(qp->device),
&to_mucontext(qp->uobject->context)->uar,
to_mucontext(qp->uobject->context)->db_tab,
to_mqp(qp)->rq.db_index);
}
mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
kfree(qp);
return 0;