/**
* pvrdma_dealloc_pd - deallocate protection domain
* @pd: the protection domain to be released
*
* @return: 0 on success, otherwise errno.
*/
int pvrdma_dealloc_pd(struct ib_pd *pd)
{
struct pvrdma_dev *dev = to_vdev(pd->device);
union pvrdma_cmd_req req;
struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd;
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD;
cmd->pd_handle = to_vpd(pd)->pd_handle;
ret = pvrdma_cmd_post(dev, &req, NULL, 0);
if (ret)
dev_warn(&dev->pdev->dev,
"could not dealloc protection domain, error: %d\n",
ret);
kfree(to_vpd(pd));
atomic_dec(&dev->num_pds);
return 0;
}
/**
* pvrdma_create_ah - create an address handle
* @pd: the protection domain
* @ah_attr: the attributes of the AH
* @udata: user data blob
*
* @return: the ib_ah pointer on success, otherwise errno.
*/
struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
struct ib_udata *udata)
{
struct pvrdma_dev *dev = to_vdev(pd->device);
struct pvrdma_ah *ah;
const struct ib_global_route *grh;
u8 port_num = rdma_ah_get_port_num(ah_attr);
if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
return ERR_PTR(-EINVAL);
grh = rdma_ah_read_grh(ah_attr);
if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw))
return ERR_PTR(-EINVAL);
if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah))
return ERR_PTR(-ENOMEM);
ah = kzalloc(sizeof(*ah), GFP_KERNEL);
if (!ah) {
atomic_dec(&dev->num_ahs);
return ERR_PTR(-ENOMEM);
}
ah->av.port_pd = to_vpd(pd)->pd_handle | (port_num << 24);
ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr);
ah->av.src_path_bits |= 0x80;
ah->av.gid_index = grh->sgid_index;
ah->av.hop_limit = grh->hop_limit;
ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) |
grh->flow_label;
memcpy(ah->av.dgid, grh->dgid.raw, 16);
memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN);
ah->ibah.device = pd->device;
ah->ibah.pd = pd;
ah->ibah.uobject = NULL;
return &ah->ibah;
}
/**
* pvrdma_create_srq - create shared receive queue
* @pd: protection domain
* @init_attr: shared receive queue attributes
* @udata: user data
*
* @return: the ib_srq pointer on success, otherwise returns an errno.
*/
struct ib_srq *pvrdma_create_srq(struct ib_pd *pd,
struct ib_srq_init_attr *init_attr,
struct ib_udata *udata)
{
struct pvrdma_srq *srq = NULL;
struct pvrdma_dev *dev = to_vdev(pd->device);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_create_srq *cmd = &req.create_srq;
struct pvrdma_cmd_create_srq_resp *resp = &rsp.create_srq_resp;
struct pvrdma_create_srq_resp srq_resp = {0};
struct pvrdma_create_srq ucmd;
unsigned long flags;
int ret;
if (!udata) {
/* No support for kernel clients. */
dev_warn(&dev->pdev->dev,
"no shared receive queue support for kernel client\n");
return ERR_PTR(-EOPNOTSUPP);
}
if (init_attr->srq_type != IB_SRQT_BASIC) {
dev_warn(&dev->pdev->dev,
"shared receive queue type %d not supported\n",
init_attr->srq_type);
return ERR_PTR(-EINVAL);
}
if (init_attr->attr.max_wr > dev->dsr->caps.max_srq_wr ||
init_attr->attr.max_sge > dev->dsr->caps.max_srq_sge) {
dev_warn(&dev->pdev->dev,
"shared receive queue size invalid\n");
return ERR_PTR(-EINVAL);
}
if (!atomic_add_unless(&dev->num_srqs, 1, dev->dsr->caps.max_srq))
return ERR_PTR(-ENOMEM);
srq = kmalloc(sizeof(*srq), GFP_KERNEL);
if (!srq) {
ret = -ENOMEM;
goto err_srq;
}
spin_lock_init(&srq->lock);
refcount_set(&srq->refcnt, 1);
init_completion(&srq->free);
dev_dbg(&dev->pdev->dev,
"create shared receive queue from user space\n");
if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
ret = -EFAULT;
goto err_srq;
}
srq->umem = ib_umem_get(pd->uobject->context,
ucmd.buf_addr,
ucmd.buf_size, 0, 0);
if (IS_ERR(srq->umem)) {
ret = PTR_ERR(srq->umem);
goto err_srq;
}
srq->npages = ib_umem_page_count(srq->umem);
if (srq->npages < 0 || srq->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
dev_warn(&dev->pdev->dev,
"overflow pages in shared receive queue\n");
ret = -EINVAL;
goto err_umem;
}
ret = pvrdma_page_dir_init(dev, &srq->pdir, srq->npages, false);
if (ret) {
dev_warn(&dev->pdev->dev,
"could not allocate page directory\n");
goto err_umem;
}
pvrdma_page_dir_insert_umem(&srq->pdir, srq->umem, 0);
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_CREATE_SRQ;
cmd->srq_type = init_attr->srq_type;
cmd->nchunks = srq->npages;
cmd->pd_handle = to_vpd(pd)->pd_handle;
cmd->attrs.max_wr = init_attr->attr.max_wr;
cmd->attrs.max_sge = init_attr->attr.max_sge;
cmd->attrs.srq_limit = init_attr->attr.srq_limit;
cmd->pdir_dma = srq->pdir.dir_dma;
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_SRQ_RESP);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not create shared receive queue, error: %d\n",
ret);
goto err_page_dir;
}
srq->srq_handle = resp->srqn;
srq_resp.srqn = resp->srqn;
spin_lock_irqsave(&dev->srq_tbl_lock, flags);
dev->srq_tbl[srq->srq_handle % dev->dsr->caps.max_srq] = srq;
spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
/* Copy udata back. */
if (ib_copy_to_udata(udata, &srq_resp, sizeof(srq_resp))) {
dev_warn(&dev->pdev->dev, "failed to copy back udata\n");
pvrdma_destroy_srq(&srq->ibsrq);
return ERR_PTR(-EINVAL);
}
return &srq->ibsrq;
err_page_dir:
pvrdma_page_dir_cleanup(dev, &srq->pdir);
err_umem:
ib_umem_release(srq->umem);
err_srq:
kfree(srq);
atomic_dec(&dev->num_srqs);
return ERR_PTR(ret);
}
