463 lines
10 KiB
C
463 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Intel MIC Platform Software Stack (MPSS)
|
|
*
|
|
* Copyright(c) 2014 Intel Corporation.
|
|
*
|
|
* Intel SCIF driver.
|
|
*/
|
|
#include "scif_main.h"
|
|
|
|
static int scif_fdopen(struct inode *inode, struct file *f)
|
|
{
|
|
struct scif_endpt *priv = scif_open();
|
|
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
f->private_data = priv;
|
|
return 0;
|
|
}
|
|
|
|
static int scif_fdclose(struct inode *inode, struct file *f)
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
return scif_close(priv);
|
|
}
|
|
|
|
static int scif_fdmmap(struct file *f, struct vm_area_struct *vma)
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
return scif_mmap(vma, priv);
|
|
}
|
|
|
|
static __poll_t scif_fdpoll(struct file *f, poll_table *wait)
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
return __scif_pollfd(f, wait, priv);
|
|
}
|
|
|
|
static int scif_fdflush(struct file *f, fl_owner_t id)
|
|
{
|
|
struct scif_endpt *ep = f->private_data;
|
|
|
|
spin_lock(&ep->lock);
|
|
/*
|
|
* The listening endpoint stashes the open file information before
|
|
* waiting for incoming connections. The release callback would never be
|
|
* called if the application closed the endpoint, while waiting for
|
|
* incoming connections from a separate thread since the file descriptor
|
|
* reference count is bumped up in the accept IOCTL. Call the flush
|
|
* routine if the id matches the endpoint open file information so that
|
|
* the listening endpoint can be woken up and the fd released.
|
|
*/
|
|
if (ep->files == id)
|
|
__scif_flush(ep);
|
|
spin_unlock(&ep->lock);
|
|
return 0;
|
|
}
|
|
|
|
static __always_inline void scif_err_debug(int err, const char *str)
|
|
{
|
|
/*
|
|
* ENOTCONN is a common uninteresting error which is
|
|
* flooding debug messages to the console unnecessarily.
|
|
*/
|
|
if (err < 0 && err != -ENOTCONN)
|
|
dev_dbg(scif_info.mdev.this_device, "%s err %d\n", str, err);
|
|
}
|
|
|
|
static long scif_fdioctl(struct file *f, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
int err = 0;
|
|
struct scifioctl_msg request;
|
|
bool non_block = false;
|
|
|
|
non_block = !!(f->f_flags & O_NONBLOCK);
|
|
|
|
switch (cmd) {
|
|
case SCIF_BIND:
|
|
{
|
|
int pn;
|
|
|
|
if (copy_from_user(&pn, argp, sizeof(pn)))
|
|
return -EFAULT;
|
|
|
|
pn = scif_bind(priv, pn);
|
|
if (pn < 0)
|
|
return pn;
|
|
|
|
if (copy_to_user(argp, &pn, sizeof(pn)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case SCIF_LISTEN:
|
|
return scif_listen(priv, arg);
|
|
case SCIF_CONNECT:
|
|
{
|
|
struct scifioctl_connect req;
|
|
struct scif_endpt *ep = (struct scif_endpt *)priv;
|
|
|
|
if (copy_from_user(&req, argp, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
err = __scif_connect(priv, &req.peer, non_block);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
req.self.node = ep->port.node;
|
|
req.self.port = ep->port.port;
|
|
|
|
if (copy_to_user(argp, &req, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
/*
|
|
* Accept is done in two halves. The request ioctl does the basic
|
|
* functionality of accepting the request and returning the information
|
|
* about it including the internal ID of the end point. The register
|
|
* is done with the internal ID on a new file descriptor opened by the
|
|
* requesting process.
|
|
*/
|
|
case SCIF_ACCEPTREQ:
|
|
{
|
|
struct scifioctl_accept request;
|
|
scif_epd_t *ep = (scif_epd_t *)&request.endpt;
|
|
|
|
if (copy_from_user(&request, argp, sizeof(request)))
|
|
return -EFAULT;
|
|
|
|
err = scif_accept(priv, &request.peer, ep, request.flags);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (copy_to_user(argp, &request, sizeof(request))) {
|
|
scif_close(*ep);
|
|
return -EFAULT;
|
|
}
|
|
/*
|
|
* Add to the list of user mode eps where the second half
|
|
* of the accept is not yet completed.
|
|
*/
|
|
mutex_lock(&scif_info.eplock);
|
|
list_add_tail(&((*ep)->miacceptlist), &scif_info.uaccept);
|
|
list_add_tail(&((*ep)->liacceptlist), &priv->li_accept);
|
|
(*ep)->listenep = priv;
|
|
priv->acceptcnt++;
|
|
mutex_unlock(&scif_info.eplock);
|
|
|
|
return 0;
|
|
}
|
|
case SCIF_ACCEPTREG:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scif_endpt *newep;
|
|
struct scif_endpt *lisep;
|
|
struct scif_endpt *fep = NULL;
|
|
struct scif_endpt *tmpep;
|
|
struct list_head *pos, *tmpq;
|
|
|
|
/* Finally replace the pointer to the accepted endpoint */
|
|
if (copy_from_user(&newep, argp, sizeof(void *)))
|
|
return -EFAULT;
|
|
|
|
/* Remove form the user accept queue */
|
|
mutex_lock(&scif_info.eplock);
|
|
list_for_each_safe(pos, tmpq, &scif_info.uaccept) {
|
|
tmpep = list_entry(pos,
|
|
struct scif_endpt, miacceptlist);
|
|
if (tmpep == newep) {
|
|
list_del(pos);
|
|
fep = tmpep;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!fep) {
|
|
mutex_unlock(&scif_info.eplock);
|
|
return -ENOENT;
|
|
}
|
|
|
|
lisep = newep->listenep;
|
|
list_for_each_safe(pos, tmpq, &lisep->li_accept) {
|
|
tmpep = list_entry(pos,
|
|
struct scif_endpt, liacceptlist);
|
|
if (tmpep == newep) {
|
|
list_del(pos);
|
|
lisep->acceptcnt--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&scif_info.eplock);
|
|
|
|
/* Free the resources automatically created from the open. */
|
|
scif_anon_inode_fput(priv);
|
|
scif_teardown_ep(priv);
|
|
scif_add_epd_to_zombie_list(priv, !SCIF_EPLOCK_HELD);
|
|
f->private_data = newep;
|
|
return 0;
|
|
}
|
|
case SCIF_SEND:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
if (copy_from_user(&request, argp,
|
|
sizeof(struct scifioctl_msg))) {
|
|
err = -EFAULT;
|
|
goto send_err;
|
|
}
|
|
err = scif_user_send(priv, (void __user *)request.msg,
|
|
request.len, request.flags);
|
|
if (err < 0)
|
|
goto send_err;
|
|
if (copy_to_user(&
|
|
((struct scifioctl_msg __user *)argp)->out_len,
|
|
&err, sizeof(err))) {
|
|
err = -EFAULT;
|
|
goto send_err;
|
|
}
|
|
err = 0;
|
|
send_err:
|
|
scif_err_debug(err, "scif_send");
|
|
return err;
|
|
}
|
|
case SCIF_RECV:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
if (copy_from_user(&request, argp,
|
|
sizeof(struct scifioctl_msg))) {
|
|
err = -EFAULT;
|
|
goto recv_err;
|
|
}
|
|
|
|
err = scif_user_recv(priv, (void __user *)request.msg,
|
|
request.len, request.flags);
|
|
if (err < 0)
|
|
goto recv_err;
|
|
|
|
if (copy_to_user(&
|
|
((struct scifioctl_msg __user *)argp)->out_len,
|
|
&err, sizeof(err))) {
|
|
err = -EFAULT;
|
|
goto recv_err;
|
|
}
|
|
err = 0;
|
|
recv_err:
|
|
scif_err_debug(err, "scif_recv");
|
|
return err;
|
|
}
|
|
case SCIF_GET_NODEIDS:
|
|
{
|
|
struct scifioctl_node_ids node_ids;
|
|
int entries;
|
|
u16 *nodes;
|
|
void __user *unodes, *uself;
|
|
u16 self;
|
|
|
|
if (copy_from_user(&node_ids, argp, sizeof(node_ids))) {
|
|
err = -EFAULT;
|
|
goto getnodes_err2;
|
|
}
|
|
|
|
entries = min_t(int, scif_info.maxid, node_ids.len);
|
|
nodes = kmalloc_array(entries, sizeof(u16), GFP_KERNEL);
|
|
if (entries && !nodes) {
|
|
err = -ENOMEM;
|
|
goto getnodes_err2;
|
|
}
|
|
node_ids.len = scif_get_node_ids(nodes, entries, &self);
|
|
|
|
unodes = (void __user *)node_ids.nodes;
|
|
if (copy_to_user(unodes, nodes, sizeof(u16) * entries)) {
|
|
err = -EFAULT;
|
|
goto getnodes_err1;
|
|
}
|
|
|
|
uself = (void __user *)node_ids.self;
|
|
if (copy_to_user(uself, &self, sizeof(u16))) {
|
|
err = -EFAULT;
|
|
goto getnodes_err1;
|
|
}
|
|
|
|
if (copy_to_user(argp, &node_ids, sizeof(node_ids))) {
|
|
err = -EFAULT;
|
|
goto getnodes_err1;
|
|
}
|
|
getnodes_err1:
|
|
kfree(nodes);
|
|
getnodes_err2:
|
|
return err;
|
|
}
|
|
case SCIF_REG:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_reg reg;
|
|
off_t ret;
|
|
|
|
if (copy_from_user(®, argp, sizeof(reg))) {
|
|
err = -EFAULT;
|
|
goto reg_err;
|
|
}
|
|
if (reg.flags & SCIF_MAP_KERNEL) {
|
|
err = -EINVAL;
|
|
goto reg_err;
|
|
}
|
|
ret = scif_register(priv, (void *)reg.addr, reg.len,
|
|
reg.offset, reg.prot, reg.flags);
|
|
if (ret < 0) {
|
|
err = (int)ret;
|
|
goto reg_err;
|
|
}
|
|
|
|
if (copy_to_user(&((struct scifioctl_reg __user *)argp)
|
|
->out_offset, &ret, sizeof(reg.out_offset))) {
|
|
err = -EFAULT;
|
|
goto reg_err;
|
|
}
|
|
err = 0;
|
|
reg_err:
|
|
scif_err_debug(err, "scif_register");
|
|
return err;
|
|
}
|
|
case SCIF_UNREG:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_unreg unreg;
|
|
|
|
if (copy_from_user(&unreg, argp, sizeof(unreg))) {
|
|
err = -EFAULT;
|
|
goto unreg_err;
|
|
}
|
|
err = scif_unregister(priv, unreg.offset, unreg.len);
|
|
unreg_err:
|
|
scif_err_debug(err, "scif_unregister");
|
|
return err;
|
|
}
|
|
case SCIF_READFROM:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_copy copy;
|
|
|
|
if (copy_from_user(©, argp, sizeof(copy))) {
|
|
err = -EFAULT;
|
|
goto readfrom_err;
|
|
}
|
|
err = scif_readfrom(priv, copy.loffset, copy.len, copy.roffset,
|
|
copy.flags);
|
|
readfrom_err:
|
|
scif_err_debug(err, "scif_readfrom");
|
|
return err;
|
|
}
|
|
case SCIF_WRITETO:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_copy copy;
|
|
|
|
if (copy_from_user(©, argp, sizeof(copy))) {
|
|
err = -EFAULT;
|
|
goto writeto_err;
|
|
}
|
|
err = scif_writeto(priv, copy.loffset, copy.len, copy.roffset,
|
|
copy.flags);
|
|
writeto_err:
|
|
scif_err_debug(err, "scif_writeto");
|
|
return err;
|
|
}
|
|
case SCIF_VREADFROM:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_copy copy;
|
|
|
|
if (copy_from_user(©, argp, sizeof(copy))) {
|
|
err = -EFAULT;
|
|
goto vreadfrom_err;
|
|
}
|
|
err = scif_vreadfrom(priv, (void __force *)copy.addr, copy.len,
|
|
copy.roffset, copy.flags);
|
|
vreadfrom_err:
|
|
scif_err_debug(err, "scif_vreadfrom");
|
|
return err;
|
|
}
|
|
case SCIF_VWRITETO:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_copy copy;
|
|
|
|
if (copy_from_user(©, argp, sizeof(copy))) {
|
|
err = -EFAULT;
|
|
goto vwriteto_err;
|
|
}
|
|
err = scif_vwriteto(priv, (void __force *)copy.addr, copy.len,
|
|
copy.roffset, copy.flags);
|
|
vwriteto_err:
|
|
scif_err_debug(err, "scif_vwriteto");
|
|
return err;
|
|
}
|
|
case SCIF_FENCE_MARK:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_fence_mark mark;
|
|
int tmp_mark = 0;
|
|
|
|
if (copy_from_user(&mark, argp, sizeof(mark))) {
|
|
err = -EFAULT;
|
|
goto fence_mark_err;
|
|
}
|
|
err = scif_fence_mark(priv, mark.flags, &tmp_mark);
|
|
if (err)
|
|
goto fence_mark_err;
|
|
if (copy_to_user((void __user *)mark.mark, &tmp_mark,
|
|
sizeof(tmp_mark))) {
|
|
err = -EFAULT;
|
|
goto fence_mark_err;
|
|
}
|
|
fence_mark_err:
|
|
scif_err_debug(err, "scif_fence_mark");
|
|
return err;
|
|
}
|
|
case SCIF_FENCE_WAIT:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
|
|
err = scif_fence_wait(priv, arg);
|
|
scif_err_debug(err, "scif_fence_wait");
|
|
return err;
|
|
}
|
|
case SCIF_FENCE_SIGNAL:
|
|
{
|
|
struct scif_endpt *priv = f->private_data;
|
|
struct scifioctl_fence_signal signal;
|
|
|
|
if (copy_from_user(&signal, argp, sizeof(signal))) {
|
|
err = -EFAULT;
|
|
goto fence_signal_err;
|
|
}
|
|
|
|
err = scif_fence_signal(priv, signal.loff, signal.lval,
|
|
signal.roff, signal.rval, signal.flags);
|
|
fence_signal_err:
|
|
scif_err_debug(err, "scif_fence_signal");
|
|
return err;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
const struct file_operations scif_fops = {
|
|
.open = scif_fdopen,
|
|
.release = scif_fdclose,
|
|
.unlocked_ioctl = scif_fdioctl,
|
|
.mmap = scif_fdmmap,
|
|
.poll = scif_fdpoll,
|
|
.flush = scif_fdflush,
|
|
.owner = THIS_MODULE,
|
|
};
|