struct ib_qp *qp;
int ret;
+ if (qp_init_attr->rwq_ind_tbl &&
+ (qp_init_attr->recv_cq ||
+ qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
+ qp_init_attr->cap.max_recv_sge))
+ return ERR_PTR(-EINVAL);
+
/*
* If the callers is using the RDMA API calculate the resources
* needed for the RDMA READ/WRITE operations.
qp->real_qp = qp;
qp->uobject = NULL;
qp->qp_type = qp_init_attr->qp_type;
+ qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
atomic_set(&qp->usecnt, 0);
qp->mrs_used = 0;
qp->srq = NULL;
} else {
qp->recv_cq = qp_init_attr->recv_cq;
- atomic_inc(&qp_init_attr->recv_cq->usecnt);
+ if (qp_init_attr->recv_cq)
+ atomic_inc(&qp_init_attr->recv_cq->usecnt);
qp->srq = qp_init_attr->srq;
if (qp->srq)
atomic_inc(&qp_init_attr->srq->usecnt);
qp->xrcd = NULL;
atomic_inc(&pd->usecnt);
- atomic_inc(&qp_init_attr->send_cq->usecnt);
+ if (qp_init_attr->send_cq)
+ atomic_inc(&qp_init_attr->send_cq->usecnt);
+ if (qp_init_attr->rwq_ind_tbl)
+ atomic_inc(&qp->rwq_ind_tbl->usecnt);
if (qp_init_attr->cap.max_rdma_ctxs) {
ret = rdma_rw_init_mrs(qp, qp_init_attr);
struct ib_pd *pd;
struct ib_cq *scq, *rcq;
struct ib_srq *srq;
+ struct ib_rwq_ind_table *ind_tbl;
int ret;
WARN_ON_ONCE(qp->mrs_used > 0);
scq = qp->send_cq;
rcq = qp->recv_cq;
srq = qp->srq;
+ ind_tbl = qp->rwq_ind_tbl;
if (!qp->uobject)
rdma_rw_cleanup_mrs(qp);
atomic_dec(&rcq->usecnt);
if (srq)
atomic_dec(&srq->usecnt);
+ if (ind_tbl)
+ atomic_dec(&ind_tbl->usecnt);
}
return ret;
}
EXPORT_SYMBOL(ib_dealloc_xrcd);
+/**
+ * ib_create_wq - Creates a WQ associated with the specified protection
+ * domain.
+ * @pd: The protection domain associated with the WQ.
+ * @wq_init_attr: A list of initial attributes required to create the
+ * WQ. If WQ creation succeeds, then the attributes are updated to
+ * the actual capabilities of the created WQ.
+ *
+ * wq_init_attr->max_wr and wq_init_attr->max_sge determine
+ * the requested size of the WQ, and set to the actual values allocated
+ * on return.
+ * If ib_create_wq() succeeds, then max_wr and max_sge will always be
+ * at least as large as the requested values.
+ */
+struct ib_wq *ib_create_wq(struct ib_pd *pd,
+ struct ib_wq_init_attr *wq_attr)
+{
+ struct ib_wq *wq;
+
+ if (!pd->device->create_wq)
+ return ERR_PTR(-ENOSYS);
+
+ wq = pd->device->create_wq(pd, wq_attr, NULL);
+ if (!IS_ERR(wq)) {
+ wq->event_handler = wq_attr->event_handler;
+ wq->wq_context = wq_attr->wq_context;
+ wq->wq_type = wq_attr->wq_type;
+ wq->cq = wq_attr->cq;
+ wq->device = pd->device;
+ wq->pd = pd;
+ wq->uobject = NULL;
+ atomic_inc(&pd->usecnt);
+ atomic_inc(&wq_attr->cq->usecnt);
+ atomic_set(&wq->usecnt, 0);
+ }
+ return wq;
+}
+EXPORT_SYMBOL(ib_create_wq);
+
+/**
+ * ib_destroy_wq - Destroys the specified WQ.
+ * @wq: The WQ to destroy.
+ */
+int ib_destroy_wq(struct ib_wq *wq)
+{
+ int err;
+ struct ib_cq *cq = wq->cq;
+ struct ib_pd *pd = wq->pd;
+
+ if (atomic_read(&wq->usecnt))
+ return -EBUSY;
+
+ err = wq->device->destroy_wq(wq);
+ if (!err) {
+ atomic_dec(&pd->usecnt);
+ atomic_dec(&cq->usecnt);
+ }
+ return err;
+}
+EXPORT_SYMBOL(ib_destroy_wq);
+
+/**
+ * ib_modify_wq - Modifies the specified WQ.
+ * @wq: The WQ to modify.
+ * @wq_attr: On input, specifies the WQ attributes to modify.
+ * @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
+ * are being modified.
+ * On output, the current values of selected WQ attributes are returned.
+ */
+int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
+ u32 wq_attr_mask)
+{
+ int err;
+
+ if (!wq->device->modify_wq)
+ return -ENOSYS;
+
+ err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
+ return err;
+}
+EXPORT_SYMBOL(ib_modify_wq);
+
+/*
+ * ib_create_rwq_ind_table - Creates a RQ Indirection Table.
+ * @device: The device on which to create the rwq indirection table.
+ * @ib_rwq_ind_table_init_attr: A list of initial attributes required to
+ * create the Indirection Table.
+ *
+ * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
+ * than the created ib_rwq_ind_table object and the caller is responsible
+ * for its memory allocation/free.
+ */
+struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
+ struct ib_rwq_ind_table_init_attr *init_attr)
+{
+ struct ib_rwq_ind_table *rwq_ind_table;
+ int i;
+ u32 table_size;
+
+ if (!device->create_rwq_ind_table)
+ return ERR_PTR(-ENOSYS);
+
+ table_size = (1 << init_attr->log_ind_tbl_size);
+ rwq_ind_table = device->create_rwq_ind_table(device,
+ init_attr, NULL);
+ if (IS_ERR(rwq_ind_table))
+ return rwq_ind_table;
+
+ rwq_ind_table->ind_tbl = init_attr->ind_tbl;
+ rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
+ rwq_ind_table->device = device;
+ rwq_ind_table->uobject = NULL;
+ atomic_set(&rwq_ind_table->usecnt, 0);
+
+ for (i = 0; i < table_size; i++)
+ atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
+
+ return rwq_ind_table;
+}
+EXPORT_SYMBOL(ib_create_rwq_ind_table);
+
+/*
+ * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
+ * @wq_ind_table: The Indirection Table to destroy.
+*/
+int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
+{
+ int err, i;
+ u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
+ struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
+
+ if (atomic_read(&rwq_ind_table->usecnt))
+ return -EBUSY;
+
+ err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table);
+ if (!err) {
+ for (i = 0; i < table_size; i++)
+ atomic_dec(&ind_tbl[i]->usecnt);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
+
struct ib_flow *ib_create_flow(struct ib_qp *qp,
struct ib_flow_attr *flow_attr,
int domain)
projects / cascardo / linux.git / blobdiff