mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
d0e874705e
The sparse tool complains as follows: drivers/misc/sgi-xp/xp_main.c:24:22: warning: symbol 'xp_dbg_name' was not declared. Should it be static? drivers/misc/sgi-xp/xp_main.c:28:15: warning: symbol 'xp_dbg_subname' was not declared. Should it be static? These symbols are not used outside of xp_main.c, so this commit marks them static. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Link: https://lore.kernel.org/r/20210324084823.7393-1-zou_wei@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
261 lines
7.1 KiB
C
261 lines
7.1 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* (C) Copyright 2020 Hewlett Packard Enterprise Development LP
|
|
* Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
|
|
*/
|
|
|
|
/*
|
|
* Cross Partition (XP) base.
|
|
*
|
|
* XP provides a base from which its users can interact
|
|
* with XPC, yet not be dependent on XPC.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include "xp.h"
|
|
|
|
/* define the XP debug device structures to be used with dev_dbg() et al */
|
|
|
|
static struct device_driver xp_dbg_name = {
|
|
.name = "xp"
|
|
};
|
|
|
|
static struct device xp_dbg_subname = {
|
|
.init_name = "", /* set to "" */
|
|
.driver = &xp_dbg_name
|
|
};
|
|
|
|
struct device *xp = &xp_dbg_subname;
|
|
|
|
/* max #of partitions possible */
|
|
short xp_max_npartitions;
|
|
EXPORT_SYMBOL_GPL(xp_max_npartitions);
|
|
|
|
short xp_partition_id;
|
|
EXPORT_SYMBOL_GPL(xp_partition_id);
|
|
|
|
u8 xp_region_size;
|
|
EXPORT_SYMBOL_GPL(xp_region_size);
|
|
|
|
unsigned long (*xp_pa) (void *addr);
|
|
EXPORT_SYMBOL_GPL(xp_pa);
|
|
|
|
unsigned long (*xp_socket_pa) (unsigned long gpa);
|
|
EXPORT_SYMBOL_GPL(xp_socket_pa);
|
|
|
|
enum xp_retval (*xp_remote_memcpy) (unsigned long dst_gpa,
|
|
const unsigned long src_gpa, size_t len);
|
|
EXPORT_SYMBOL_GPL(xp_remote_memcpy);
|
|
|
|
int (*xp_cpu_to_nasid) (int cpuid);
|
|
EXPORT_SYMBOL_GPL(xp_cpu_to_nasid);
|
|
|
|
enum xp_retval (*xp_expand_memprotect) (unsigned long phys_addr,
|
|
unsigned long size);
|
|
EXPORT_SYMBOL_GPL(xp_expand_memprotect);
|
|
enum xp_retval (*xp_restrict_memprotect) (unsigned long phys_addr,
|
|
unsigned long size);
|
|
EXPORT_SYMBOL_GPL(xp_restrict_memprotect);
|
|
|
|
/*
|
|
* xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
|
|
* users of XPC.
|
|
*/
|
|
struct xpc_registration xpc_registrations[XPC_MAX_NCHANNELS];
|
|
EXPORT_SYMBOL_GPL(xpc_registrations);
|
|
|
|
/*
|
|
* Initialize the XPC interface to NULL to indicate that XPC isn't loaded.
|
|
*/
|
|
struct xpc_interface xpc_interface = { };
|
|
EXPORT_SYMBOL_GPL(xpc_interface);
|
|
|
|
/*
|
|
* XPC calls this when it (the XPC module) has been loaded.
|
|
*/
|
|
void
|
|
xpc_set_interface(void (*connect) (int),
|
|
void (*disconnect) (int),
|
|
enum xp_retval (*send) (short, int, u32, void *, u16),
|
|
enum xp_retval (*send_notify) (short, int, u32, void *, u16,
|
|
xpc_notify_func, void *),
|
|
void (*received) (short, int, void *),
|
|
enum xp_retval (*partid_to_nasids) (short, void *))
|
|
{
|
|
xpc_interface.connect = connect;
|
|
xpc_interface.disconnect = disconnect;
|
|
xpc_interface.send = send;
|
|
xpc_interface.send_notify = send_notify;
|
|
xpc_interface.received = received;
|
|
xpc_interface.partid_to_nasids = partid_to_nasids;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xpc_set_interface);
|
|
|
|
/*
|
|
* XPC calls this when it (the XPC module) is being unloaded.
|
|
*/
|
|
void
|
|
xpc_clear_interface(void)
|
|
{
|
|
memset(&xpc_interface, 0, sizeof(xpc_interface));
|
|
}
|
|
EXPORT_SYMBOL_GPL(xpc_clear_interface);
|
|
|
|
/*
|
|
* Register for automatic establishment of a channel connection whenever
|
|
* a partition comes up.
|
|
*
|
|
* Arguments:
|
|
*
|
|
* ch_number - channel # to register for connection.
|
|
* func - function to call for asynchronous notification of channel
|
|
* state changes (i.e., connection, disconnection, error) and
|
|
* the arrival of incoming messages.
|
|
* key - pointer to optional user-defined value that gets passed back
|
|
* to the user on any callouts made to func.
|
|
* payload_size - size in bytes of the XPC message's payload area which
|
|
* contains a user-defined message. The user should make
|
|
* this large enough to hold their largest message.
|
|
* nentries - max #of XPC message entries a message queue can contain.
|
|
* The actual number, which is determined when a connection
|
|
* is established and may be less then requested, will be
|
|
* passed to the user via the xpConnected callout.
|
|
* assigned_limit - max number of kthreads allowed to be processing
|
|
* messages (per connection) at any given instant.
|
|
* idle_limit - max number of kthreads allowed to be idle at any given
|
|
* instant.
|
|
*/
|
|
enum xp_retval
|
|
xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
|
|
u16 nentries, u32 assigned_limit, u32 idle_limit)
|
|
{
|
|
struct xpc_registration *registration;
|
|
|
|
DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
|
|
DBUG_ON(payload_size == 0 || nentries == 0);
|
|
DBUG_ON(func == NULL);
|
|
DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
|
|
|
|
if (XPC_MSG_SIZE(payload_size) > XPC_MSG_MAX_SIZE)
|
|
return xpPayloadTooBig;
|
|
|
|
registration = &xpc_registrations[ch_number];
|
|
|
|
if (mutex_lock_interruptible(®istration->mutex) != 0)
|
|
return xpInterrupted;
|
|
|
|
/* if XPC_CHANNEL_REGISTERED(ch_number) */
|
|
if (registration->func != NULL) {
|
|
mutex_unlock(®istration->mutex);
|
|
return xpAlreadyRegistered;
|
|
}
|
|
|
|
/* register the channel for connection */
|
|
registration->entry_size = XPC_MSG_SIZE(payload_size);
|
|
registration->nentries = nentries;
|
|
registration->assigned_limit = assigned_limit;
|
|
registration->idle_limit = idle_limit;
|
|
registration->key = key;
|
|
registration->func = func;
|
|
|
|
mutex_unlock(®istration->mutex);
|
|
|
|
if (xpc_interface.connect)
|
|
xpc_interface.connect(ch_number);
|
|
|
|
return xpSuccess;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xpc_connect);
|
|
|
|
/*
|
|
* Remove the registration for automatic connection of the specified channel
|
|
* when a partition comes up.
|
|
*
|
|
* Before returning this xpc_disconnect() will wait for all connections on the
|
|
* specified channel have been closed/torndown. So the caller can be assured
|
|
* that they will not be receiving any more callouts from XPC to their
|
|
* function registered via xpc_connect().
|
|
*
|
|
* Arguments:
|
|
*
|
|
* ch_number - channel # to unregister.
|
|
*/
|
|
void
|
|
xpc_disconnect(int ch_number)
|
|
{
|
|
struct xpc_registration *registration;
|
|
|
|
DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
|
|
|
|
registration = &xpc_registrations[ch_number];
|
|
|
|
/*
|
|
* We've decided not to make this a down_interruptible(), since we
|
|
* figured XPC's users will just turn around and call xpc_disconnect()
|
|
* again anyways, so we might as well wait, if need be.
|
|
*/
|
|
mutex_lock(®istration->mutex);
|
|
|
|
/* if !XPC_CHANNEL_REGISTERED(ch_number) */
|
|
if (registration->func == NULL) {
|
|
mutex_unlock(®istration->mutex);
|
|
return;
|
|
}
|
|
|
|
/* remove the connection registration for the specified channel */
|
|
registration->func = NULL;
|
|
registration->key = NULL;
|
|
registration->nentries = 0;
|
|
registration->entry_size = 0;
|
|
registration->assigned_limit = 0;
|
|
registration->idle_limit = 0;
|
|
|
|
if (xpc_interface.disconnect)
|
|
xpc_interface.disconnect(ch_number);
|
|
|
|
mutex_unlock(®istration->mutex);
|
|
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL_GPL(xpc_disconnect);
|
|
|
|
static int __init
|
|
xp_init(void)
|
|
{
|
|
enum xp_retval ret;
|
|
int ch_number;
|
|
|
|
/* initialize the connection registration mutex */
|
|
for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++)
|
|
mutex_init(&xpc_registrations[ch_number].mutex);
|
|
|
|
if (is_uv_system())
|
|
ret = xp_init_uv();
|
|
else
|
|
ret = 0;
|
|
|
|
if (ret != xpSuccess)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(xp_init);
|
|
|
|
static void __exit
|
|
xp_exit(void)
|
|
{
|
|
if (is_uv_system())
|
|
xp_exit_uv();
|
|
}
|
|
|
|
module_exit(xp_exit);
|
|
|
|
MODULE_AUTHOR("Silicon Graphics, Inc.");
|
|
MODULE_DESCRIPTION("Cross Partition (XP) base");
|
|
MODULE_LICENSE("GPL");
|