diff options
Diffstat (limited to 'drivers/infiniband/core/verbs.c')
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c new file mode 100644 index 000000000000..7c08ed0cd7dd --- /dev/null +++ b/drivers/infiniband/core/verbs.c @@ -0,0 +1,434 @@ +/* + * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2004 Infinicon Corporation. All rights reserved. + * Copyright (c) 2004 Intel Corporation. All rights reserved. + * Copyright (c) 2004 Topspin Corporation. All rights reserved. + * Copyright (c) 2004 Voltaire Corporation. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * $Id: verbs.c 1349 2004-12-16 21:09:43Z roland $ + */ + +#include <linux/errno.h> +#include <linux/err.h> + +#include <ib_verbs.h> + +/* Protection domains */ + +struct ib_pd *ib_alloc_pd(struct ib_device *device) +{ + struct ib_pd *pd; + + pd = device->alloc_pd(device); + + if (!IS_ERR(pd)) { + pd->device = device; + atomic_set(&pd->usecnt, 0); + } + + return pd; +} +EXPORT_SYMBOL(ib_alloc_pd); + +int ib_dealloc_pd(struct ib_pd *pd) +{ + if (atomic_read(&pd->usecnt)) + return -EBUSY; + + return pd->device->dealloc_pd(pd); +} +EXPORT_SYMBOL(ib_dealloc_pd); + +/* Address handles */ + +struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) +{ + struct ib_ah *ah; + + ah = pd->device->create_ah(pd, ah_attr); + + if (!IS_ERR(ah)) { + ah->device = pd->device; + ah->pd = pd; + atomic_inc(&pd->usecnt); + } + + return ah; +} +EXPORT_SYMBOL(ib_create_ah); + +int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) +{ + return ah->device->modify_ah ? + ah->device->modify_ah(ah, ah_attr) : + -ENOSYS; +} +EXPORT_SYMBOL(ib_modify_ah); + +int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) +{ + return ah->device->query_ah ? + ah->device->query_ah(ah, ah_attr) : + -ENOSYS; +} +EXPORT_SYMBOL(ib_query_ah); + +int ib_destroy_ah(struct ib_ah *ah) +{ + struct ib_pd *pd; + int ret; + + pd = ah->pd; + ret = ah->device->destroy_ah(ah); + if (!ret) + atomic_dec(&pd->usecnt); + + return ret; +} +EXPORT_SYMBOL(ib_destroy_ah); + +/* Queue pairs */ + +struct ib_qp *ib_create_qp(struct ib_pd *pd, + struct ib_qp_init_attr *qp_init_attr) +{ + struct ib_qp *qp; + + qp = pd->device->create_qp(pd, qp_init_attr); + + if (!IS_ERR(qp)) { + qp->device = pd->device; + qp->pd = pd; + qp->send_cq = qp_init_attr->send_cq; + qp->recv_cq = qp_init_attr->recv_cq; + qp->srq = qp_init_attr->srq; + qp->event_handler = qp_init_attr->event_handler; + qp->qp_context = qp_init_attr->qp_context; + qp->qp_type = qp_init_attr->qp_type; + atomic_inc(&pd->usecnt); + atomic_inc(&qp_init_attr->send_cq->usecnt); + atomic_inc(&qp_init_attr->recv_cq->usecnt); + if (qp_init_attr->srq) + atomic_inc(&qp_init_attr->srq->usecnt); + } + + return qp; +} +EXPORT_SYMBOL(ib_create_qp); + +int ib_modify_qp(struct ib_qp *qp, + struct ib_qp_attr *qp_attr, + int qp_attr_mask) +{ + return qp->device->modify_qp(qp, qp_attr, qp_attr_mask); +} +EXPORT_SYMBOL(ib_modify_qp); + +int ib_query_qp(struct ib_qp *qp, + struct ib_qp_attr *qp_attr, + int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr) +{ + return qp->device->query_qp ? + qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) : + -ENOSYS; +} +EXPORT_SYMBOL(ib_query_qp); + +int ib_destroy_qp(struct ib_qp *qp) +{ + struct ib_pd *pd; + struct ib_cq *scq, *rcq; + struct ib_srq *srq; + int ret; + + pd = qp->pd; + scq = qp->send_cq; + rcq = qp->recv_cq; + srq = qp->srq; + + ret = qp->device->destroy_qp(qp); + if (!ret) { + atomic_dec(&pd->usecnt); + atomic_dec(&scq->usecnt); + atomic_dec(&rcq->usecnt); + if (srq) + atomic_dec(&srq->usecnt); + } + + return ret; +} +EXPORT_SYMBOL(ib_destroy_qp); + +/* Completion queues */ + +struct ib_cq *ib_create_cq(struct ib_device *device, + ib_comp_handler comp_handler, + void (*event_handler)(struct ib_event *, void *), + void *cq_context, int cqe) +{ + struct ib_cq *cq; + + cq = device->create_cq(device, cqe); + + if (!IS_ERR(cq)) { + cq->device = device; + cq->comp_handler = comp_handler; + cq->event_handler = event_handler; + cq->cq_context = cq_context; + atomic_set(&cq->usecnt, 0); + } + + return cq; +} +EXPORT_SYMBOL(ib_create_cq); + +int ib_destroy_cq(struct ib_cq *cq) +{ + if (atomic_read(&cq->usecnt)) + return -EBUSY; + + return cq->device->destroy_cq(cq); +} +EXPORT_SYMBOL(ib_destroy_cq); + +int ib_resize_cq(struct ib_cq *cq, + int cqe) +{ + int ret; + + if (!cq->device->resize_cq) + return -ENOSYS; + + ret = cq->device->resize_cq(cq, &cqe); + if (!ret) + cq->cqe = cqe; + + return ret; +} +EXPORT_SYMBOL(ib_resize_cq); + +/* Memory regions */ + +struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) +{ + struct ib_mr *mr; + + mr = pd->device->get_dma_mr(pd, mr_access_flags); + + if (!IS_ERR(mr)) { + mr->device = pd->device; + mr->pd = pd; + atomic_inc(&pd->usecnt); + atomic_set(&mr->usecnt, 0); + } + + return mr; +} +EXPORT_SYMBOL(ib_get_dma_mr); + +struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, + struct ib_phys_buf *phys_buf_array, + int num_phys_buf, + int mr_access_flags, + u64 *iova_start) +{ + struct ib_mr *mr; + + mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, + mr_access_flags, iova_start); + + if (!IS_ERR(mr)) { + mr->device = pd->device; + mr->pd = pd; + atomic_inc(&pd->usecnt); + atomic_set(&mr->usecnt, 0); + } + + return mr; +} +EXPORT_SYMBOL(ib_reg_phys_mr); + +int ib_rereg_phys_mr(struct ib_mr *mr, + int mr_rereg_mask, + struct ib_pd *pd, + struct ib_phys_buf *phys_buf_array, + int num_phys_buf, + int mr_access_flags, + u64 *iova_start) +{ + struct ib_pd *old_pd; + int ret; + + if (!mr->device->rereg_phys_mr) + return -ENOSYS; + + if (atomic_read(&mr->usecnt)) + return -EBUSY; + + old_pd = mr->pd; + + ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, + phys_buf_array, num_phys_buf, + mr_access_flags, iova_start); + + if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { + atomic_dec(&old_pd->usecnt); + atomic_inc(&pd->usecnt); + } + + return ret; +} +EXPORT_SYMBOL(ib_rereg_phys_mr); + +int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) +{ + return mr->device->query_mr ? + mr->device->query_mr(mr, mr_attr) : -ENOSYS; +} +EXPORT_SYMBOL(ib_query_mr); + +int ib_dereg_mr(struct ib_mr *mr) +{ + struct ib_pd *pd; + int ret; + + if (atomic_read(&mr->usecnt)) + return -EBUSY; + + pd = mr->pd; + ret = mr->device->dereg_mr(mr); + if (!ret) + atomic_dec(&pd->usecnt); + + return ret; +} +EXPORT_SYMBOL(ib_dereg_mr); + +/* Memory windows */ + +struct ib_mw *ib_alloc_mw(struct ib_pd *pd) +{ + struct ib_mw *mw; + + if (!pd->device->alloc_mw) + return ERR_PTR(-ENOSYS); + + mw = pd->device->alloc_mw(pd); + if (!IS_ERR(mw)) { + mw->device = pd->device; + mw->pd = pd; + atomic_inc(&pd->usecnt); + } + + return mw; +} +EXPORT_SYMBOL(ib_alloc_mw); + +int ib_dealloc_mw(struct ib_mw *mw) +{ + struct ib_pd *pd; + int ret; + + pd = mw->pd; + ret = mw->device->dealloc_mw(mw); + if (!ret) + atomic_dec(&pd->usecnt); + + return ret; +} +EXPORT_SYMBOL(ib_dealloc_mw); + +/* "Fast" memory regions */ + +struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, + int mr_access_flags, + struct ib_fmr_attr *fmr_attr) +{ + struct ib_fmr *fmr; + + if (!pd->device->alloc_fmr) + return ERR_PTR(-ENOSYS); + + fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); + if (!IS_ERR(fmr)) { + fmr->device = pd->device; + fmr->pd = pd; + atomic_inc(&pd->usecnt); + } + + return fmr; +} +EXPORT_SYMBOL(ib_alloc_fmr); + +int ib_unmap_fmr(struct list_head *fmr_list) +{ + struct ib_fmr *fmr; + + if (list_empty(fmr_list)) + return 0; + + fmr = list_entry(fmr_list->next, struct ib_fmr, list); + return fmr->device->unmap_fmr(fmr_list); +} +EXPORT_SYMBOL(ib_unmap_fmr); + +int ib_dealloc_fmr(struct ib_fmr *fmr) +{ + struct ib_pd *pd; + int ret; + + pd = fmr->pd; + ret = fmr->device->dealloc_fmr(fmr); + if (!ret) + atomic_dec(&pd->usecnt); + + return ret; +} +EXPORT_SYMBOL(ib_dealloc_fmr); + +/* Multicast groups */ + +int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) +{ + return qp->device->attach_mcast ? + qp->device->attach_mcast(qp, gid, lid) : + -ENOSYS; +} +EXPORT_SYMBOL(ib_attach_mcast); + +int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) +{ + return qp->device->detach_mcast ? + qp->device->detach_mcast(qp, gid, lid) : + -ENOSYS; +} +EXPORT_SYMBOL(ib_detach_mcast); |