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linux/drivers/infiniband/core/uverbs_cmd.c
Roland Dreier bc38a6abdd [PATCH] IB uverbs: core implementation 
Add the core of the InfiniBand userspace verbs implementation, including
creating character device nodes, dispatching requests from userspace, and
passing event notifications back up to userspace.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-07 18:23:48 -07:00

1007 lines
26 KiB
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/*
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Cisco Systems. 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: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
*/
#include <asm/uaccess.h>
#include "uverbs.h"
#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
do { \
(udata)->inbuf = (void __user *) (ibuf); \
(udata)->outbuf = (void __user *) (obuf); \
(udata)->inlen = (ilen); \
(udata)->outlen = (olen); \
} while (0)
ssize_t ib_uverbs_query_params(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_query_params cmd;
struct ib_uverbs_query_params_resp resp;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
memset(&resp, 0, sizeof resp);
resp.num_cq_events = file->device->num_comp;
if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp))
return -EFAULT;
return in_len;
}
ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_get_context cmd;
struct ib_uverbs_get_context_resp resp;
struct ib_udata udata;
struct ib_device *ibdev = file->device->ib_dev;
int i;
int ret = in_len;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
INIT_UDATA(&udata, buf + sizeof cmd,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);
file->ucontext = ibdev->alloc_ucontext(ibdev, &udata);
if (IS_ERR(file->ucontext)) {
ret = PTR_ERR(file->ucontext);
file->ucontext = NULL;
return ret;
}
file->ucontext->device = ibdev;
INIT_LIST_HEAD(&file->ucontext->pd_list);
INIT_LIST_HEAD(&file->ucontext->mr_list);
INIT_LIST_HEAD(&file->ucontext->mw_list);
INIT_LIST_HEAD(&file->ucontext->cq_list);
INIT_LIST_HEAD(&file->ucontext->qp_list);
INIT_LIST_HEAD(&file->ucontext->srq_list);
INIT_LIST_HEAD(&file->ucontext->ah_list);
spin_lock_init(&file->ucontext->lock);
resp.async_fd = file->async_file.fd;
for (i = 0; i < file->device->num_comp; ++i)
if (copy_to_user((void __user *) (unsigned long) cmd.cq_fd_tab +
i * sizeof (__u32),
&file->comp_file[i].fd, sizeof (__u32)))
goto err;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
goto err;
return in_len;
err:
ibdev->dealloc_ucontext(file->ucontext);
file->ucontext = NULL;
return -EFAULT;
}
ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_query_device cmd;
struct ib_uverbs_query_device_resp resp;
struct ib_device_attr attr;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
ret = ib_query_device(file->device->ib_dev, &attr);
if (ret)
return ret;
memset(&resp, 0, sizeof resp);
resp.fw_ver = attr.fw_ver;
resp.node_guid = attr.node_guid;
resp.sys_image_guid = attr.sys_image_guid;
resp.max_mr_size = attr.max_mr_size;
resp.page_size_cap = attr.page_size_cap;
resp.vendor_id = attr.vendor_id;
resp.vendor_part_id = attr.vendor_part_id;
resp.hw_ver = attr.hw_ver;
resp.max_qp = attr.max_qp;
resp.max_qp_wr = attr.max_qp_wr;
resp.device_cap_flags = attr.device_cap_flags;
resp.max_sge = attr.max_sge;
resp.max_sge_rd = attr.max_sge_rd;
resp.max_cq = attr.max_cq;
resp.max_cqe = attr.max_cqe;
resp.max_mr = attr.max_mr;
resp.max_pd = attr.max_pd;
resp.max_qp_rd_atom = attr.max_qp_rd_atom;
resp.max_ee_rd_atom = attr.max_ee_rd_atom;
resp.max_res_rd_atom = attr.max_res_rd_atom;
resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
resp.atomic_cap = attr.atomic_cap;
resp.max_ee = attr.max_ee;
resp.max_rdd = attr.max_rdd;
resp.max_mw = attr.max_mw;
resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
resp.max_mcast_grp = attr.max_mcast_grp;
resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
resp.max_ah = attr.max_ah;
resp.max_fmr = attr.max_fmr;
resp.max_map_per_fmr = attr.max_map_per_fmr;
resp.max_srq = attr.max_srq;
resp.max_srq_wr = attr.max_srq_wr;
resp.max_srq_sge = attr.max_srq_sge;
resp.max_pkeys = attr.max_pkeys;
resp.local_ca_ack_delay = attr.local_ca_ack_delay;
resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
return -EFAULT;
return in_len;
}
ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_query_port cmd;
struct ib_uverbs_query_port_resp resp;
struct ib_port_attr attr;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
if (ret)
return ret;
memset(&resp, 0, sizeof resp);
resp.state = attr.state;
resp.max_mtu = attr.max_mtu;
resp.active_mtu = attr.active_mtu;
resp.gid_tbl_len = attr.gid_tbl_len;
resp.port_cap_flags = attr.port_cap_flags;
resp.max_msg_sz = attr.max_msg_sz;
resp.bad_pkey_cntr = attr.bad_pkey_cntr;
resp.qkey_viol_cntr = attr.qkey_viol_cntr;
resp.pkey_tbl_len = attr.pkey_tbl_len;
resp.lid = attr.lid;
resp.sm_lid = attr.sm_lid;
resp.lmc = attr.lmc;
resp.max_vl_num = attr.max_vl_num;
resp.sm_sl = attr.sm_sl;
resp.subnet_timeout = attr.subnet_timeout;
resp.init_type_reply = attr.init_type_reply;
resp.active_width = attr.active_width;
resp.active_speed = attr.active_speed;
resp.phys_state = attr.phys_state;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
return -EFAULT;
return in_len;
}
ssize_t ib_uverbs_query_gid(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_query_gid cmd;
struct ib_uverbs_query_gid_resp resp;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
memset(&resp, 0, sizeof resp);
ret = ib_query_gid(file->device->ib_dev, cmd.port_num, cmd.index,
(union ib_gid *) resp.gid);
if (ret)
return ret;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
return -EFAULT;
return in_len;
}
ssize_t ib_uverbs_query_pkey(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_query_pkey cmd;
struct ib_uverbs_query_pkey_resp resp;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
memset(&resp, 0, sizeof resp);
ret = ib_query_pkey(file->device->ib_dev, cmd.port_num, cmd.index,
&resp.pkey);
if (ret)
return ret;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
return -EFAULT;
return in_len;
}
ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_alloc_pd cmd;
struct ib_uverbs_alloc_pd_resp resp;
struct ib_udata udata;
struct ib_uobject *uobj;
struct ib_pd *pd;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
INIT_UDATA(&udata, buf + sizeof cmd,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);
uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
if (!uobj)
return -ENOMEM;
uobj->context = file->ucontext;
pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
file->ucontext, &udata);
if (IS_ERR(pd)) {
ret = PTR_ERR(pd);
goto err;
}
pd->device = file->device->ib_dev;
pd->uobject = uobj;
atomic_set(&pd->usecnt, 0);
retry:
if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
ret = -ENOMEM;
goto err_pd;
}
down(&ib_uverbs_idr_mutex);
ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
up(&ib_uverbs_idr_mutex);
if (ret == -EAGAIN)
goto retry;
if (ret)
goto err_pd;
spin_lock_irq(&file->ucontext->lock);
list_add_tail(&uobj->list, &file->ucontext->pd_list);
spin_unlock_irq(&file->ucontext->lock);
memset(&resp, 0, sizeof resp);
resp.pd_handle = uobj->id;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp)) {
ret = -EFAULT;
goto err_list;
}
return in_len;
err_list:
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
down(&ib_uverbs_idr_mutex);
idr_remove(&ib_uverbs_pd_idr, uobj->id);
up(&ib_uverbs_idr_mutex);
err_pd:
ib_dealloc_pd(pd);
err:
kfree(uobj);
return ret;
}
ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
const char __user *buf,
int in_len, int out_len)
{
struct ib_uverbs_dealloc_pd cmd;
struct ib_pd *pd;
struct ib_uobject *uobj;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
if (!pd || pd->uobject->context != file->ucontext)
goto out;
uobj = pd->uobject;
ret = ib_dealloc_pd(pd);
if (ret)
goto out;
idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
kfree(uobj);
out:
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_reg_mr cmd;
struct ib_uverbs_reg_mr_resp resp;
struct ib_udata udata;
struct ib_umem_object *obj;
struct ib_pd *pd;
struct ib_mr *mr;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
INIT_UDATA(&udata, buf + sizeof cmd,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);
if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
return -EINVAL;
obj = kmalloc(sizeof *obj, GFP_KERNEL);
if (!obj)
return -ENOMEM;
obj->uobject.context = file->ucontext;
/*
* We ask for writable memory if any access flags other than
* "remote read" are set. "Local write" and "remote write"
* obviously require write access. "Remote atomic" can do
* things like fetch and add, which will modify memory, and
* "MW bind" can change permissions by binding a window.
*/
ret = ib_umem_get(file->device->ib_dev, &obj->umem,
(void *) (unsigned long) cmd.start, cmd.length,
!!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
if (ret)
goto err_free;
obj->umem.virt_base = cmd.hca_va;
down(&ib_uverbs_idr_mutex);
pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
if (!pd || pd->uobject->context != file->ucontext) {
ret = -EINVAL;
goto err_up;
}
if (!pd->device->reg_user_mr) {
ret = -ENOSYS;
goto err_up;
}
mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
if (IS_ERR(mr)) {
ret = PTR_ERR(mr);
goto err_up;
}
mr->device = pd->device;
mr->pd = pd;
mr->uobject = &obj->uobject;
atomic_inc(&pd->usecnt);
atomic_set(&mr->usecnt, 0);
memset(&resp, 0, sizeof resp);
resp.lkey = mr->lkey;
resp.rkey = mr->rkey;
retry:
if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
ret = -ENOMEM;
goto err_unreg;
}
ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
if (ret == -EAGAIN)
goto retry;
if (ret)
goto err_unreg;
resp.mr_handle = obj->uobject.id;
spin_lock_irq(&file->ucontext->lock);
list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
spin_unlock_irq(&file->ucontext->lock);
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp)) {
ret = -EFAULT;
goto err_list;
}
up(&ib_uverbs_idr_mutex);
return in_len;
err_list:
spin_lock_irq(&file->ucontext->lock);
list_del(&obj->uobject.list);
spin_unlock_irq(&file->ucontext->lock);
err_unreg:
ib_dereg_mr(mr);
err_up:
up(&ib_uverbs_idr_mutex);
ib_umem_release(file->device->ib_dev, &obj->umem);
err_free:
kfree(obj);
return ret;
}
ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_dereg_mr cmd;
struct ib_mr *mr;
struct ib_umem_object *memobj;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
if (!mr || mr->uobject->context != file->ucontext)
goto out;
memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
ret = ib_dereg_mr(mr);
if (ret)
goto out;
idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
spin_lock_irq(&file->ucontext->lock);
list_del(&memobj->uobject.list);
spin_unlock_irq(&file->ucontext->lock);
ib_umem_release(file->device->ib_dev, &memobj->umem);
kfree(memobj);
out:
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_create_cq cmd;
struct ib_uverbs_create_cq_resp resp;
struct ib_udata udata;
struct ib_uobject *uobj;
struct ib_cq *cq;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
INIT_UDATA(&udata, buf + sizeof cmd,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);
if (cmd.event_handler >= file->device->num_comp)
return -EINVAL;
uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
if (!uobj)
return -ENOMEM;
uobj->user_handle = cmd.user_handle;
uobj->context = file->ucontext;
cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
file->ucontext, &udata);
if (IS_ERR(cq)) {
ret = PTR_ERR(cq);
goto err;
}
cq->device = file->device->ib_dev;
cq->uobject = uobj;
cq->comp_handler = ib_uverbs_comp_handler;
cq->event_handler = ib_uverbs_cq_event_handler;
cq->cq_context = file;
atomic_set(&cq->usecnt, 0);
retry:
if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
ret = -ENOMEM;
goto err_cq;
}
down(&ib_uverbs_idr_mutex);
ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->id);
up(&ib_uverbs_idr_mutex);
if (ret == -EAGAIN)
goto retry;
if (ret)
goto err_cq;
spin_lock_irq(&file->ucontext->lock);
list_add_tail(&uobj->list, &file->ucontext->cq_list);
spin_unlock_irq(&file->ucontext->lock);
memset(&resp, 0, sizeof resp);
resp.cq_handle = uobj->id;
resp.cqe = cq->cqe;
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp)) {
ret = -EFAULT;
goto err_list;
}
return in_len;
err_list:
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
down(&ib_uverbs_idr_mutex);
idr_remove(&ib_uverbs_cq_idr, uobj->id);
up(&ib_uverbs_idr_mutex);
err_cq:
ib_destroy_cq(cq);
err:
kfree(uobj);
return ret;
}
ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_destroy_cq cmd;
struct ib_cq *cq;
struct ib_uobject *uobj;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
if (!cq || cq->uobject->context != file->ucontext)
goto out;
uobj = cq->uobject;
ret = ib_destroy_cq(cq);
if (ret)
goto out;
idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
kfree(uobj);
out:
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_create_qp cmd;
struct ib_uverbs_create_qp_resp resp;
struct ib_udata udata;
struct ib_uobject *uobj;
struct ib_pd *pd;
struct ib_cq *scq, *rcq;
struct ib_qp *qp;
struct ib_qp_init_attr attr;
int ret;
if (out_len < sizeof resp)
return -ENOSPC;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
INIT_UDATA(&udata, buf + sizeof cmd,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);
uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
if (!uobj)
return -ENOMEM;
down(&ib_uverbs_idr_mutex);
pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
if (!pd || pd->uobject->context != file->ucontext ||
!scq || scq->uobject->context != file->ucontext ||
!rcq || rcq->uobject->context != file->ucontext) {
ret = -EINVAL;
goto err_up;
}
attr.event_handler = ib_uverbs_qp_event_handler;
attr.qp_context = file;
attr.send_cq = scq;
attr.recv_cq = rcq;
attr.srq = NULL;
attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
attr.qp_type = cmd.qp_type;
attr.cap.max_send_wr = cmd.max_send_wr;
attr.cap.max_recv_wr = cmd.max_recv_wr;
attr.cap.max_send_sge = cmd.max_send_sge;
attr.cap.max_recv_sge = cmd.max_recv_sge;
attr.cap.max_inline_data = cmd.max_inline_data;
uobj->user_handle = cmd.user_handle;
uobj->context = file->ucontext;
qp = pd->device->create_qp(pd, &attr, &udata);
if (IS_ERR(qp)) {
ret = PTR_ERR(qp);
goto err_up;
}
qp->device = pd->device;
qp->pd = pd;
qp->send_cq = attr.send_cq;
qp->recv_cq = attr.recv_cq;
qp->srq = attr.srq;
qp->uobject = uobj;
qp->event_handler = attr.event_handler;
qp->qp_context = attr.qp_context;
qp->qp_type = attr.qp_type;
atomic_inc(&pd->usecnt);
atomic_inc(&attr.send_cq->usecnt);
atomic_inc(&attr.recv_cq->usecnt);
if (attr.srq)
atomic_inc(&attr.srq->usecnt);
memset(&resp, 0, sizeof resp);
resp.qpn = qp->qp_num;
retry:
if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
ret = -ENOMEM;
goto err_destroy;
}
ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->id);
if (ret == -EAGAIN)
goto retry;
if (ret)
goto err_destroy;
resp.qp_handle = uobj->id;
spin_lock_irq(&file->ucontext->lock);
list_add_tail(&uobj->list, &file->ucontext->qp_list);
spin_unlock_irq(&file->ucontext->lock);
if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp)) {
ret = -EFAULT;
goto err_list;
}
up(&ib_uverbs_idr_mutex);
return in_len;
err_list:
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
err_destroy:
ib_destroy_qp(qp);
err_up:
up(&ib_uverbs_idr_mutex);
kfree(uobj);
return ret;
}
ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_modify_qp cmd;
struct ib_qp *qp;
struct ib_qp_attr *attr;
int ret;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
attr = kmalloc(sizeof *attr, GFP_KERNEL);
if (!attr)
return -ENOMEM;
down(&ib_uverbs_idr_mutex);
qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
if (!qp || qp->uobject->context != file->ucontext) {
ret = -EINVAL;
goto out;
}
attr->qp_state = cmd.qp_state;
attr->cur_qp_state = cmd.cur_qp_state;
attr->path_mtu = cmd.path_mtu;
attr->path_mig_state = cmd.path_mig_state;
attr->qkey = cmd.qkey;
attr->rq_psn = cmd.rq_psn;
attr->sq_psn = cmd.sq_psn;
attr->dest_qp_num = cmd.dest_qp_num;
attr->qp_access_flags = cmd.qp_access_flags;
attr->pkey_index = cmd.pkey_index;
attr->alt_pkey_index = cmd.pkey_index;
attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
attr->max_rd_atomic = cmd.max_rd_atomic;
attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
attr->min_rnr_timer = cmd.min_rnr_timer;
attr->port_num = cmd.port_num;
attr->timeout = cmd.timeout;
attr->retry_cnt = cmd.retry_cnt;
attr->rnr_retry = cmd.rnr_retry;
attr->alt_port_num = cmd.alt_port_num;
attr->alt_timeout = cmd.alt_timeout;
memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
attr->ah_attr.dlid = cmd.dest.dlid;
attr->ah_attr.sl = cmd.dest.sl;
attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
attr->ah_attr.static_rate = cmd.dest.static_rate;
attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
attr->ah_attr.port_num = cmd.dest.port_num;
memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
attr->alt_ah_attr.sl = cmd.alt_dest.sl;
attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
ret = ib_modify_qp(qp, attr, cmd.attr_mask);
if (ret)
goto out;
ret = in_len;
out:
up(&ib_uverbs_idr_mutex);
kfree(attr);
return ret;
}
ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_destroy_qp cmd;
struct ib_qp *qp;
struct ib_uobject *uobj;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
if (!qp || qp->uobject->context != file->ucontext)
goto out;
uobj = qp->uobject;
ret = ib_destroy_qp(qp);
if (ret)
goto out;
idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
spin_lock_irq(&file->ucontext->lock);
list_del(&uobj->list);
spin_unlock_irq(&file->ucontext->lock);
kfree(uobj);
out:
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_attach_mcast cmd;
struct ib_qp *qp;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
if (qp && qp->uobject->context == file->ucontext)
ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len)
{
struct ib_uverbs_detach_mcast cmd;
struct ib_qp *qp;
int ret = -EINVAL;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
down(&ib_uverbs_idr_mutex);
qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
if (qp && qp->uobject->context == file->ucontext)
ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
up(&ib_uverbs_idr_mutex);
return ret ? ret : in_len;
}
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