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// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/idr.h>
#include <asm/mshyperv.h>
#include "mshv.h"
#include "mshv_root.h"
/*
* Ports and connections are hypervisor struct used for inter-partition
* communication. Port represents the source and connection represents
* the destination. Partitions are responsible for managing the port and
* connection ids.
*
*/
#define PORTID_MIN 1
#define PORTID_MAX INT_MAX
static DEFINE_IDR(port_table_idr);
void
mshv_port_table_fini(void)
{
struct port_table_info *port_info;
unsigned long i, tmp;
idr_lock(&port_table_idr);
if (!idr_is_empty(&port_table_idr)) {
idr_for_each_entry_ul(&port_table_idr, port_info, tmp, i) {
port_info = idr_remove(&port_table_idr, i);
kfree_rcu(port_info, portbl_rcu);
}
}
idr_unlock(&port_table_idr);
}
int
mshv_portid_alloc(struct port_table_info *info)
{
int ret = 0;
idr_lock(&port_table_idr);
ret = idr_alloc(&port_table_idr, info, PORTID_MIN,
PORTID_MAX, GFP_KERNEL);
idr_unlock(&port_table_idr);
return ret;
}
void
mshv_portid_free(int port_id)
{
struct port_table_info *info;
idr_lock(&port_table_idr);
info = idr_remove(&port_table_idr, port_id);
WARN_ON(!info);
idr_unlock(&port_table_idr);
synchronize_rcu();
kfree(info);
}
int
mshv_portid_lookup(int port_id, struct port_table_info *info)
{
struct port_table_info *_info;
int ret = -ENOENT;
rcu_read_lock();
_info = idr_find(&port_table_idr, port_id);
rcu_read_unlock();
if (_info) {
*info = *_info;
ret = 0;
}
return ret;
}
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