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IB/mad: Add user space RMPP support

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Using the new registration mechanism, define a flag that indicates the
user wishes to process RMPP messages in user space rather than have
the kernel process them.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Ira Weiny 2014-08-08 19:00:56 -04:00 • committed by Roland Dreier
parent 0f29b46d49
commit 1471cb6ca6
4 changed files with 89 additions and 37 deletions
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34
drivers/infiniband/core/user_mad.c
View file

@ -506,13 +506,15 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class);
if (!ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)) {
copy_offset = IB_MGMT_MAD_HDR;
rmpp_active = 0;
} else {
if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
&& ib_mad_kernel_rmpp_agent(agent)) {
copy_offset = IB_MGMT_RMPP_HDR;
rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE;
IB_MGMT_RMPP_FLAG_ACTIVE;
} else {
copy_offset = IB_MGMT_MAD_HDR;
rmpp_active = 0;
}
data_len = count - hdr_size(file) - hdr_len;
@ -558,14 +560,22 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
rmpp_mad->mad_hdr.tid = *tid;
}
spin_lock_irq(&file->send_lock);
ret = is_duplicate(file, packet);
if (!ret)
if (!ib_mad_kernel_rmpp_agent(agent)
&& ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)
&& (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) {
spin_lock_irq(&file->send_lock);
list_add_tail(&packet->list, &file->send_list);
spin_unlock_irq(&file->send_lock);
if (ret) {
ret = -EINVAL;
goto err_msg;
spin_unlock_irq(&file->send_lock);
} else {
spin_lock_irq(&file->send_lock);
ret = is_duplicate(file, packet);
if (!ret)
list_add_tail(&packet->list, &file->send_list);
spin_unlock_irq(&file->send_lock);
if (ret) {
ret = -EINVAL;
goto err_msg;
}
}
ret = ib_post_send_mad(packet->msg, NULL);