/**
* pvrdma_modify_srq - modify shared receive queue attributes
* @ibsrq: the shared receive queue to modify
* @attr: the shared receive queue's new attributes
* @attr_mask: attributes mask
* @udata: user data
*
* @returns 0 on success, otherwise returns an errno.
*/
int pvrdma_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
{
struct pvrdma_srq *vsrq = to_vsrq(ibsrq);
union pvrdma_cmd_req req;
struct pvrdma_cmd_modify_srq *cmd = &req.modify_srq;
struct pvrdma_dev *dev = to_vdev(ibsrq->device);
int ret;
/* Only support SRQ limit. */
if (!(attr_mask & IB_SRQ_LIMIT))
return -EINVAL;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_MODIFY_SRQ;
cmd->srq_handle = vsrq->srq_handle;
cmd->attrs.srq_limit = attr->srq_limit;
cmd->attr_mask = attr_mask;
ret = pvrdma_cmd_post(dev, &req, NULL, 0);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not modify shared receive queue, error: %d\n",
ret);
return -EINVAL;
}
return ret;
}
/**
* pvrdma_query_srq - query shared receive queue
* @ibsrq: the shared receive queue to query
* @srq_attr: attributes to query and return to client
*
* @return: 0 for success, otherwise returns an errno.
*/
int pvrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
{
struct pvrdma_dev *dev = to_vdev(ibsrq->device);
struct pvrdma_srq *srq = to_vsrq(ibsrq);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_query_srq *cmd = &req.query_srq;
struct pvrdma_cmd_query_srq_resp *resp = &rsp.query_srq_resp;
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_QUERY_SRQ;
cmd->srq_handle = srq->srq_handle;
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_SRQ_RESP);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"could not query shared receive queue, error: %d\n",
ret);
return -EINVAL;
}
srq_attr->srq_limit = resp->attrs.srq_limit;
srq_attr->max_wr = resp->attrs.max_wr;
srq_attr->max_sge = resp->attrs.max_sge;
return 0;
}
/**
* pvrdma_query_pkey - query device port's P_Key table
* @ibdev: the device to query
* @port: the port number
* @index: the index
* @pkey: the device P_Key value
*
* @return: 0 on success, otherwise negative errno
*/
int pvrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
int err = 0;
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY;
cmd->port_num = port;
cmd->index = index;
err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp,
PVRDMA_CMD_QUERY_PKEY_RESP);
if (err < 0) {
dev_warn(&to_vdev(ibdev)->pdev->dev,
"could not query pkey, error: %d\n", err);
return err;
}
*pkey = rsp.query_pkey_resp.pkey;
return 0;
}
/**
* pvrdma_alloc_pd - allocate protection domain
* @ibdev: the IB device
* @context: user context
* @udata: user data
*
* @return: the ib_pd protection domain pointer on success, otherwise errno.
*/
struct ib_pd *pvrdma_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct pvrdma_pd *pd;
struct pvrdma_dev *dev = to_vdev(ibdev);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_create_pd *cmd = &req.create_pd;
struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp;
struct pvrdma_alloc_pd_resp pd_resp = {0};
int ret;
void *ptr;
/* Check allowed max pds */
if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd))
return ERR_PTR(-ENOMEM);
pd = kmalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
ptr = ERR_PTR(-ENOMEM);
goto err;
}
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD;
cmd->ctx_handle = (context) ? to_vucontext(context)->ctx_handle : 0;
ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP);
if (ret < 0) {
dev_warn(&dev->pdev->dev,
"failed to allocate protection domain, error: %d\n",
ret);
ptr = ERR_PTR(ret);
goto freepd;
}
pd->privileged = !context;
pd->pd_handle = resp->pd_handle;
pd->pdn = resp->pd_handle;
pd_resp.pdn = resp->pd_handle;
if (context) {
if (ib_copy_to_udata(udata, &pd_resp, sizeof(pd_resp))) {
dev_warn(&dev->pdev->dev,
"failed to copy back protection domain\n");
pvrdma_dealloc_pd(&pd->ibpd);
return ERR_PTR(-EFAULT);
}
}
/* u32 pd handle */
return &pd->ibpd;
freepd:
kfree(pd);
err:
atomic_dec(&dev->num_pds);
return ptr;
}
/**
* pvrdma_alloc_ucontext - allocate ucontext
* @ibdev: the IB device
* @udata: user data
*
* @return: the ib_ucontext pointer on success, otherwise errno.
*/
struct ib_ucontext *pvrdma_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct pvrdma_dev *vdev = to_vdev(ibdev);
struct pvrdma_ucontext *context;
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_create_uc *cmd = &req.create_uc;
struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;
struct pvrdma_alloc_ucontext_resp uresp = {0};
int ret;
void *ptr;
if (!vdev->ib_active)
return ERR_PTR(-EAGAIN);
context = kmalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return ERR_PTR(-ENOMEM);
context->dev = vdev;
ret = pvrdma_uar_alloc(vdev, &context->uar);
if (ret) {
kfree(context);
return ERR_PTR(-ENOMEM);
}
/* get ctx_handle from host */
memset(cmd, 0, sizeof(*cmd));
cmd->pfn = context->uar.pfn;
cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC;
ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP);
if (ret < 0) {
dev_warn(&vdev->pdev->dev,
"could not create ucontext, error: %d\n", ret);
ptr = ERR_PTR(ret);
goto err;
}
context->ctx_handle = resp->ctx_handle;
/* copy back to user */
uresp.qp_tab_size = vdev->dsr->caps.max_qp;
ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
if (ret) {
pvrdma_uar_free(vdev, &context->uar);
context->ibucontext.device = ibdev;
pvrdma_dealloc_ucontext(&context->ibucontext);
return ERR_PTR(-EFAULT);
}
return &context->ibucontext;
err:
pvrdma_uar_free(vdev, &context->uar);
kfree(context);
return ptr;
}
/**
* pvrdma_query_port - query device port attributes
* @ibdev: the device to query
* @port: the port number
* @props: the device properties
*
* @return: 0 on success, otherwise negative errno
*/
int pvrdma_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props)
{
struct pvrdma_dev *dev = to_vdev(ibdev);
union pvrdma_cmd_req req;
union pvrdma_cmd_resp rsp;
struct pvrdma_cmd_query_port *cmd = &req.query_port;
struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp;
int err;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT;
cmd->port_num = port;
err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP);
if (err < 0) {
dev_warn(&dev->pdev->dev,
"could not query port, error: %d\n", err);
return err;
}
/* props being zeroed by the caller, avoid zeroing it here */
props->state = pvrdma_port_state_to_ib(resp->attrs.state);
props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu);
props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu);
props->gid_tbl_len = resp->attrs.gid_tbl_len;
props->port_cap_flags =
pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags);
props->port_cap_flags |= IB_PORT_CM_SUP;
props->ip_gids = true;
props->max_msg_sz = resp->attrs.max_msg_sz;
props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;
props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;
props->pkey_tbl_len = resp->attrs.pkey_tbl_len;
props->lid = resp->attrs.lid;
props->sm_lid = resp->attrs.sm_lid;
props->lmc = resp->attrs.lmc;
props->max_vl_num = resp->attrs.max_vl_num;
props->sm_sl = resp->attrs.sm_sl;
props->subnet_timeout = resp->attrs.subnet_timeout;
props->init_type_reply = resp->attrs.init_type_reply;
props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width);
props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed);
props->phys_state = resp->attrs.phys_state;
return 0;
}
/**
* pvrdma_destroy_srq - destroy shared receive queue
* @srq: the shared receive queue to destroy
*
* @return: 0 for success.
*/
int pvrdma_destroy_srq(struct ib_srq *srq)
{
struct pvrdma_srq *vsrq = to_vsrq(srq);
union pvrdma_cmd_req req;
struct pvrdma_cmd_destroy_srq *cmd = &req.destroy_srq;
struct pvrdma_dev *dev = to_vdev(srq->device);
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_DESTROY_SRQ;
cmd->srq_handle = vsrq->srq_handle;
ret = pvrdma_cmd_post(dev, &req, NULL, 0);
if (ret < 0)
dev_warn(&dev->pdev->dev,
"destroy shared receive queue failed, error: %d\n",
ret);
pvrdma_free_srq(dev, vsrq);
return 0;
}
/**
* 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_dealloc_ucontext - deallocate ucontext
* @ibcontext: the ucontext
*
* @return: 0 on success, otherwise errno.
*/
int pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext)
{
struct pvrdma_ucontext *context = to_vucontext(ibcontext);
union pvrdma_cmd_req req;
struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc;
int ret;
memset(cmd, 0, sizeof(*cmd));
cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC;
cmd->ctx_handle = context->ctx_handle;
ret = pvrdma_cmd_post(context->dev, &req, NULL, 0);
if (ret < 0)
dev_warn(&context->dev->pdev->dev,
"destroy ucontext failed, error: %d\n", ret);
/* Free the UAR even if the device command failed */
pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar);
kfree(context);
return ret;
}
/**
* 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);
}
