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linux/drivers/s390/net/iucv.c
Jörn Engel 6ab3d5624e Remove obsolete #include <linux/config.h> 
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00

2546 lines
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C
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/*
* IUCV network driver
*
* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s):
* Original source:
* Alan Altmark (Alan_Altmark@us.ibm.com) Sept. 2000
* Xenia Tkatschow (xenia@us.ibm.com)
* 2Gb awareness and general cleanup:
* Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
*
* Documentation used:
* The original source
* CP Programming Service, IBM document # SC24-5760
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/* #define DEBUG */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/device.h>
#include <asm/atomic.h>
#include "iucv.h"
#include <asm/io.h>
#include <asm/s390_ext.h>
#include <asm/ebcdic.h>
#include <asm/smp.h>
#include <asm/s390_rdev.h>
/* FLAGS:
* All flags are defined in the field IPFLAGS1 of each function
* and can be found in CP Programming Services.
* IPSRCCLS - Indicates you have specified a source class
* IPFGMCL - Indicates you have specified a target class
* IPFGPID - Indicates you have specified a pathid
* IPFGMID - Indicates you have specified a message ID
* IPANSLST - Indicates that you are using an address list for
* reply data
* IPBUFLST - Indicates that you are using an address list for
* message data
*/
#define IPSRCCLS 0x01
#define IPFGMCL 0x01
#define IPFGPID 0x02
#define IPFGMID 0x04
#define IPANSLST 0x08
#define IPBUFLST 0x40
static int
iucv_bus_match (struct device *dev, struct device_driver *drv)
{
return 0;
}
struct bus_type iucv_bus = {
.name = "iucv",
.match = iucv_bus_match,
};
struct device *iucv_root;
/* General IUCV interrupt structure */
typedef struct {
__u16 ippathid;
__u8 res1;
__u8 iptype;
__u32 res2;
__u8 ipvmid[8];
__u8 res3[24];
} iucv_GeneralInterrupt;
static iucv_GeneralInterrupt *iucv_external_int_buffer = NULL;
/* Spin Lock declaration */
static DEFINE_SPINLOCK(iucv_lock);
static int messagesDisabled = 0;
/***************INTERRUPT HANDLING ***************/
typedef struct {
struct list_head queue;
iucv_GeneralInterrupt data;
} iucv_irqdata;
static struct list_head iucv_irq_queue;
static DEFINE_SPINLOCK(iucv_irq_queue_lock);
/*
*Internal function prototypes
*/
static void iucv_tasklet_handler(unsigned long);
static void iucv_irq_handler(struct pt_regs *, __u16);
static DECLARE_TASKLET(iucv_tasklet,iucv_tasklet_handler,0);
/************ FUNCTION ID'S ****************************/
#define ACCEPT 10
#define CONNECT 11
#define DECLARE_BUFFER 12
#define PURGE 9
#define QUERY 0
#define QUIESCE 13
#define RECEIVE 5
#define REJECT 8
#define REPLY 6
#define RESUME 14
#define RETRIEVE_BUFFER 2
#define SEND 4
#define SETMASK 16
#define SEVER 15
/**
* Structure: handler
* members: list - list management.
* structure: id
* userid - 8 char array of machine identification
* user_data - 16 char array for user identification
* mask - 24 char array used to compare the 2 previous
* interrupt_table - vector of interrupt functions.
* pgm_data - ulong, application data that is passed
* to the interrupt handlers
*/
typedef struct handler_t {
struct list_head list;
struct {
__u8 userid[8];
__u8 user_data[16];
__u8 mask[24];
} id;
iucv_interrupt_ops_t *interrupt_table;
void *pgm_data;
} handler;
/**
* iucv_handler_table: List of registered handlers.
*/
static struct list_head iucv_handler_table;
/**
* iucv_pathid_table: an array of *handler pointing into
* iucv_handler_table for fast indexing by pathid;
*/
static handler **iucv_pathid_table;
static unsigned long max_connections;
/**
* iucv_cpuid: contains the logical cpu number of the cpu which
* has declared the iucv buffer by issuing DECLARE_BUFFER.
* If no cpu has done the initialization iucv_cpuid contains -1.
*/
static int iucv_cpuid = -1;
/**
* register_flag: is 0 when external interrupt has not been registered
*/
static int register_flag;
/****************FIVE 40-BYTE PARAMETER STRUCTURES******************/
/* Data struct 1: iparml_control
* Used for iucv_accept
* iucv_connect
* iucv_quiesce
* iucv_resume
* iucv_sever
* iucv_retrieve_buffer
* Data struct 2: iparml_dpl (data in parameter list)
* Used for iucv_send_prmmsg
* iucv_send2way_prmmsg
* iucv_send2way_prmmsg_array
* iucv_reply_prmmsg
* Data struct 3: iparml_db (data in a buffer)
* Used for iucv_receive
* iucv_receive_array
* iucv_reject
* iucv_reply
* iucv_reply_array
* iucv_send
* iucv_send_array
* iucv_send2way
* iucv_send2way_array
* iucv_declare_buffer
* Data struct 4: iparml_purge
* Used for iucv_purge
* iucv_query
* Data struct 5: iparml_set_mask
* Used for iucv_set_mask
*/
typedef struct {
__u16 ippathid;
__u8 ipflags1;
__u8 iprcode;
__u16 ipmsglim;
__u16 res1;
__u8 ipvmid[8];
__u8 ipuser[16];
__u8 iptarget[8];
} iparml_control;
typedef struct {
__u16 ippathid;
__u8 ipflags1;
__u8 iprcode;
__u32 ipmsgid;
__u32 iptrgcls;
__u8 iprmmsg[8];
__u32 ipsrccls;
__u32 ipmsgtag;
__u32 ipbfadr2;
__u32 ipbfln2f;
__u32 res;
} iparml_dpl;
typedef struct {
__u16 ippathid;
__u8 ipflags1;
__u8 iprcode;
__u32 ipmsgid;
__u32 iptrgcls;
__u32 ipbfadr1;
__u32 ipbfln1f;
__u32 ipsrccls;
__u32 ipmsgtag;
__u32 ipbfadr2;
__u32 ipbfln2f;
__u32 res;
} iparml_db;
typedef struct {
__u16 ippathid;
__u8 ipflags1;
__u8 iprcode;
__u32 ipmsgid;
__u8 ipaudit[3];
__u8 res1[5];
__u32 res2;
__u32 ipsrccls;
__u32 ipmsgtag;
__u32 res3[3];
} iparml_purge;
typedef struct {
__u8 ipmask;
__u8 res1[2];
__u8 iprcode;
__u32 res2[9];
} iparml_set_mask;
typedef struct {
union {
iparml_control p_ctrl;
iparml_dpl p_dpl;
iparml_db p_db;
iparml_purge p_purge;
iparml_set_mask p_set_mask;
} param;
atomic_t in_use;
__u32 res;
} __attribute__ ((aligned(8))) iucv_param;
#define PARAM_POOL_SIZE (PAGE_SIZE / sizeof(iucv_param))
static iucv_param * iucv_param_pool;
MODULE_AUTHOR("(C) 2001 IBM Corp. by Fritz Elfert (felfert@millenux.com)");
MODULE_DESCRIPTION("Linux for S/390 IUCV lowlevel driver");
MODULE_LICENSE("GPL");
/*
* Debugging stuff
*******************************************************************************/
#ifdef DEBUG
static int debuglevel = 0;
module_param(debuglevel, int, 0);
MODULE_PARM_DESC(debuglevel,
"Specifies the debug level (0=off ... 3=all)");
static void
iucv_dumpit(char *title, void *buf, int len)
{
int i;
__u8 *p = (__u8 *)buf;
if (debuglevel < 3)
return;
printk(KERN_DEBUG "%s\n", title);
printk(" ");
for (i = 0; i < len; i++) {
if (!(i % 16) && i != 0)
printk ("\n ");
else if (!(i % 4) && i != 0)
printk(" ");
printk("%02X", *p++);
}
if (len % 16)
printk ("\n");
return;
}
#define iucv_debug(lvl, fmt, args...) \
do { \
if (debuglevel >= lvl) \
printk(KERN_DEBUG "%s: " fmt "\n", __FUNCTION__ , ## args); \
} while (0)
#else
#define iucv_debug(lvl, fmt, args...)
#define iucv_dumpit(title, buf, len)
#endif
/*
* Internal functions
*******************************************************************************/
/**
* print start banner
*/
static void
iucv_banner(void)
{
printk(KERN_INFO "IUCV lowlevel driver initialized\n");
}
/**
* iucv_init - Initialization
*
* Allocates and initializes various data structures.
*/
static int
iucv_init(void)
{
int ret;
if (iucv_external_int_buffer)
return 0;
if (!MACHINE_IS_VM) {
printk(KERN_ERR "IUCV: IUCV connection needs VM as base\n");
return -EPROTONOSUPPORT;
}
ret = bus_register(&iucv_bus);
if (ret) {
printk(KERN_ERR "IUCV: failed to register bus.\n");
return ret;
}
iucv_root = s390_root_dev_register("iucv");
if (IS_ERR(iucv_root)) {
printk(KERN_ERR "IUCV: failed to register iucv root.\n");
bus_unregister(&iucv_bus);
return PTR_ERR(iucv_root);
}
/* Note: GFP_DMA used used to get memory below 2G */
iucv_external_int_buffer = kzalloc(sizeof(iucv_GeneralInterrupt),
GFP_KERNEL|GFP_DMA);
if (!iucv_external_int_buffer) {
printk(KERN_WARNING
"%s: Could not allocate external interrupt buffer\n",
__FUNCTION__);
s390_root_dev_unregister(iucv_root);
bus_unregister(&iucv_bus);
return -ENOMEM;
}
/* Initialize parameter pool */
iucv_param_pool = kzalloc(sizeof(iucv_param) * PARAM_POOL_SIZE,
GFP_KERNEL|GFP_DMA);
if (!iucv_param_pool) {
printk(KERN_WARNING "%s: Could not allocate param pool\n",
__FUNCTION__);
kfree(iucv_external_int_buffer);
iucv_external_int_buffer = NULL;
s390_root_dev_unregister(iucv_root);
bus_unregister(&iucv_bus);
return -ENOMEM;
}
/* Initialize irq queue */
INIT_LIST_HEAD(&iucv_irq_queue);
/* Initialize handler table */
INIT_LIST_HEAD(&iucv_handler_table);
iucv_banner();
return 0;
}
/**
* iucv_exit - De-Initialization
*
* Frees everything allocated from iucv_init.
*/
static int iucv_retrieve_buffer (void);
static void
iucv_exit(void)
{
iucv_retrieve_buffer();
kfree(iucv_external_int_buffer);
iucv_external_int_buffer = NULL;
kfree(iucv_param_pool);
iucv_param_pool = NULL;
s390_root_dev_unregister(iucv_root);
bus_unregister(&iucv_bus);
printk(KERN_INFO "IUCV lowlevel driver unloaded\n");
}
/**
* grab_param: - Get a parameter buffer from the pre-allocated pool.
*
* This function searches for an unused element in the pre-allocated pool
* of parameter buffers. If one is found, it marks it "in use" and returns
* a pointer to it. The calling function is responsible for releasing it
* when it has finished its usage.
*
* Returns: A pointer to iucv_param.
*/
static __inline__ iucv_param *
grab_param(void)
{
iucv_param *ptr;
static int hint = 0;
ptr = iucv_param_pool + hint;
do {
ptr++;
if (ptr >= iucv_param_pool + PARAM_POOL_SIZE)
ptr = iucv_param_pool;
} while (atomic_cmpxchg(&ptr->in_use, 0, 1) != 0);
hint = ptr - iucv_param_pool;
memset(&ptr->param, 0, sizeof(ptr->param));
return ptr;
}
/**
* release_param - Release a parameter buffer.
* @p: A pointer to a struct iucv_param, previously obtained by calling
* grab_param().
*
* This function marks the specified parameter buffer "unused".
*/
static __inline__ void
release_param(void *p)
{
atomic_set(&((iucv_param *)p)->in_use, 0);
}
/**
* iucv_add_handler: - Add a new handler
* @new_handler: handle that is being entered into chain.
*
* Places new handle on iucv_handler_table, if identical handler is not
* found.
*
* Returns: 0 on success, !0 on failure (handler already in chain).
*/
static int
iucv_add_handler (handler *new)
{
ulong flags;
iucv_debug(1, "entering");
iucv_dumpit("handler:", new, sizeof(handler));
spin_lock_irqsave (&iucv_lock, flags);
if (!list_empty(&iucv_handler_table)) {
struct list_head *lh;
/**
* Search list for handler with identical id. If one
* is found, the new handler is _not_ added.
*/
list_for_each(lh, &iucv_handler_table) {
handler *h = list_entry(lh, handler, list);
if (!memcmp(&new->id, &h->id, sizeof(h->id))) {
iucv_debug(1, "ret 1");
spin_unlock_irqrestore (&iucv_lock, flags);
return 1;
}
}
}
/**
* If we get here, no handler was found.
*/
INIT_LIST_HEAD(&new->list);
list_add(&new->list, &iucv_handler_table);
spin_unlock_irqrestore (&iucv_lock, flags);
iucv_debug(1, "exiting");
return 0;
}
/**
* b2f0:
* @code: identifier of IUCV call to CP.
* @parm: pointer to 40 byte iparml area passed to CP
*
* Calls CP to execute IUCV commands.
*
* Returns: return code from CP's IUCV call
*/
static __inline__ ulong
b2f0(__u32 code, void *parm)
{
iucv_dumpit("iparml before b2f0 call:", parm, sizeof(iucv_param));
asm volatile (
"LRA 1,0(%1)\n\t"
"LR 0,%0\n\t"
".long 0xb2f01000"
:
: "d" (code), "a" (parm)
: "0", "1"
);
iucv_dumpit("iparml after b2f0 call:", parm, sizeof(iucv_param));
return (unsigned long)*((__u8 *)(parm + 3));
}
/*
* Name: iucv_add_pathid
* Purpose: Adds a path id to the system.
* Input: pathid - pathid that is going to be entered into system
* handle - address of handler that the pathid will be associated
* with.
* pgm_data - token passed in by application.
* Output: 0: successful addition of pathid
* - EINVAL - pathid entry is being used by another application
* - ENOMEM - storage allocation for a new pathid table failed
*/
static int
__iucv_add_pathid(__u16 pathid, handler *handler)
{
iucv_debug(1, "entering");
iucv_debug(1, "handler is pointing to %p", handler);
if (pathid > (max_connections - 1))
return -EINVAL;
if (iucv_pathid_table[pathid]) {
iucv_debug(1, "pathid entry is %p", iucv_pathid_table[pathid]);
printk(KERN_WARNING
"%s: Pathid being used, error.\n", __FUNCTION__);
return -EINVAL;
}
iucv_pathid_table[pathid] = handler;
iucv_debug(1, "exiting");
return 0;
} /* end of add_pathid function */
static int
iucv_add_pathid(__u16 pathid, handler *handler)
{
ulong flags;
int rc;
spin_lock_irqsave (&iucv_lock, flags);
rc = __iucv_add_pathid(pathid, handler);
spin_unlock_irqrestore (&iucv_lock, flags);
return rc;
}
static void
iucv_remove_pathid(__u16 pathid)
{
ulong flags;
if (pathid > (max_connections - 1))
return;
spin_lock_irqsave (&iucv_lock, flags);
iucv_pathid_table[pathid] = NULL;
spin_unlock_irqrestore (&iucv_lock, flags);
}
/**
* iucv_declare_buffer_cpuid
* Register at VM for subsequent IUCV operations. This is executed
* on the reserved CPU iucv_cpuid. Called from iucv_declare_buffer().
*/
static void
iucv_declare_buffer_cpuid (void *result)
{
iparml_db *parm;
parm = (iparml_db *)grab_param();
parm->ipbfadr1 = virt_to_phys(iucv_external_int_buffer);
if ((*((ulong *)result) = b2f0(DECLARE_BUFFER, parm)) == 1)
*((ulong *)result) = parm->iprcode;
release_param(parm);
}
/**
* iucv_retrieve_buffer_cpuid:
* Unregister IUCV usage at VM. This is always executed on the same
* cpu that registered the buffer to VM.
* Called from iucv_retrieve_buffer().
*/
static void
iucv_retrieve_buffer_cpuid (void *cpu)
{
iparml_control *parm;
parm = (iparml_control *)grab_param();
b2f0(RETRIEVE_BUFFER, parm);
release_param(parm);
}
/**
* Name: iucv_declare_buffer
* Purpose: Specifies the guests real address of an external
* interrupt.
* Input: void
* Output: iprcode - return code from b2f0 call
*/
static int
iucv_declare_buffer (void)
{
unsigned long flags;
ulong b2f0_result;
iucv_debug(1, "entering");
b2f0_result = -ENODEV;
spin_lock_irqsave (&iucv_lock, flags);
if (iucv_cpuid == -1) {
/* Reserve any cpu for use by iucv. */
iucv_cpuid = smp_get_cpu(CPU_MASK_ALL);
spin_unlock_irqrestore (&iucv_lock, flags);
smp_call_function_on(iucv_declare_buffer_cpuid,
&b2f0_result, 0, 1, iucv_cpuid);
if (b2f0_result) {
smp_put_cpu(iucv_cpuid);
iucv_cpuid = -1;
}
iucv_debug(1, "Address of EIB = %p", iucv_external_int_buffer);
} else {
spin_unlock_irqrestore (&iucv_lock, flags);
b2f0_result = 0;
}
iucv_debug(1, "exiting");
return b2f0_result;
}
/**
* iucv_retrieve_buffer:
*
* Terminates all use of IUCV.
* Returns: return code from CP
*/
static int
iucv_retrieve_buffer (void)
{
iucv_debug(1, "entering");
if (iucv_cpuid != -1) {
smp_call_function_on(iucv_retrieve_buffer_cpuid,
0, 0, 1, iucv_cpuid);
/* Release the cpu reserved by iucv_declare_buffer. */
smp_put_cpu(iucv_cpuid);
iucv_cpuid = -1;
}
iucv_debug(1, "exiting");
return 0;
}
/**
* iucv_remove_handler:
* @users_handler: handler to be removed
*
* Remove handler when application unregisters.
*/
static void
iucv_remove_handler(handler *handler)
{
unsigned long flags;
if ((!iucv_pathid_table) || (!handler))
return;
iucv_debug(1, "entering");
spin_lock_irqsave (&iucv_lock, flags);
list_del(&handler->list);
if (list_empty(&iucv_handler_table)) {
if (register_flag) {
unregister_external_interrupt(0x4000, iucv_irq_handler);
register_flag = 0;
}
}
spin_unlock_irqrestore (&iucv_lock, flags);
iucv_debug(1, "exiting");
return;
}
/**
* iucv_register_program:
* @pgmname: user identification
* @userid: machine identification
* @pgmmask: Indicates which bits in the pgmname and userid combined will be
* used to determine who is given control.
* @ops: Address of interrupt handler table.
* @pgm_data: Application data to be passed to interrupt handlers.
*
* Registers an application with IUCV.
* Returns:
* The address of handler, or NULL on failure.
* NOTE on pgmmask:
* If pgmname, userid and pgmmask are provided, pgmmask is entered into the
* handler as is.
* If pgmmask is NULL, the internal mask is set to all 0xff's
* When userid is NULL, the first 8 bytes of the internal mask are forced
* to 0x00.
* If pgmmask and userid are NULL, the first 8 bytes of the internal mask
* are forced to 0x00 and the last 16 bytes to 0xff.
*/
iucv_handle_t
iucv_register_program (__u8 pgmname[16],
__u8 userid[8],
__u8 pgmmask[24],
iucv_interrupt_ops_t * ops, void *pgm_data)
{
ulong rc = 0; /* return code from function calls */
handler *new_handler;
iucv_debug(1, "entering");
if (ops == NULL) {
/* interrupt table is not defined */
printk(KERN_WARNING "%s: Interrupt table is not defined, "
"exiting\n", __FUNCTION__);
return NULL;
}
if (!pgmname) {
printk(KERN_WARNING "%s: pgmname not provided\n", __FUNCTION__);
return NULL;
}
/* Allocate handler entry */
new_handler = (handler *)kmalloc(sizeof(handler), GFP_ATOMIC);
if (new_handler == NULL) {
printk(KERN_WARNING "%s: storage allocation for new handler "
"failed.\n", __FUNCTION__);
return NULL;
}
if (!iucv_pathid_table) {
if (iucv_init()) {
kfree(new_handler);
return NULL;
}
max_connections = iucv_query_maxconn();
iucv_pathid_table = kcalloc(max_connections, sizeof(handler *),
GFP_ATOMIC);
if (iucv_pathid_table == NULL) {
printk(KERN_WARNING "%s: iucv_pathid_table storage "
"allocation failed\n", __FUNCTION__);
kfree(new_handler);
return NULL;
}
}
memset(new_handler, 0, sizeof (handler));
memcpy(new_handler->id.user_data, pgmname,
sizeof (new_handler->id.user_data));
if (userid) {
memcpy (new_handler->id.userid, userid,
sizeof (new_handler->id.userid));
ASCEBC (new_handler->id.userid,
sizeof (new_handler->id.userid));
EBC_TOUPPER (new_handler->id.userid,
sizeof (new_handler->id.userid));
if (pgmmask) {
memcpy (new_handler->id.mask, pgmmask,
sizeof (new_handler->id.mask));
} else {
memset (new_handler->id.mask, 0xFF,
sizeof (new_handler->id.mask));
}
} else {
if (pgmmask) {
memcpy (new_handler->id.mask, pgmmask,
sizeof (new_handler->id.mask));
} else {
memset (new_handler->id.mask, 0xFF,
sizeof (new_handler->id.mask));
}
memset (new_handler->id.userid, 0x00,
sizeof (new_handler->id.userid));
}
/* fill in the rest of handler */
new_handler->pgm_data = pgm_data;
new_handler->interrupt_table = ops;
/*
* Check if someone else is registered with same pgmname, userid
* and mask. If someone is already registered with same pgmname,
* userid and mask, registration will fail and NULL will be returned
* to the application.
* If identical handler not found, then handler is added to list.
*/
rc = iucv_add_handler(new_handler);
if (rc) {
printk(KERN_WARNING "%s: Someone already registered with same "
"pgmname, userid, pgmmask\n", __FUNCTION__);
kfree (new_handler);
return NULL;
}
rc = iucv_declare_buffer();
if (rc) {
char *err = "Unknown";
iucv_remove_handler(new_handler);
kfree(new_handler);
switch(rc) {
case 0x03:
err = "Directory error";
break;
case 0x0a:
err = "Invalid length";
break;
case 0x13:
err = "Buffer already exists";
break;
case 0x3e:
err = "Buffer overlap";
break;
case 0x5c:
err = "Paging or storage error";
break;
}
printk(KERN_WARNING "%s: iucv_declare_buffer "
"returned error 0x%02lx (%s)\n", __FUNCTION__, rc, err);
return NULL;
}
if (!register_flag) {
/* request the 0x4000 external interrupt */
rc = register_external_interrupt (0x4000, iucv_irq_handler);
if (rc) {
iucv_remove_handler(new_handler);
kfree (new_handler);
printk(KERN_WARNING "%s: "
"register_external_interrupt returned %ld\n",
__FUNCTION__, rc);
return NULL;
}
register_flag = 1;
}
iucv_debug(1, "exiting");
return new_handler;
} /* end of register function */
/**
* iucv_unregister_program:
* @handle: address of handler
*
* Unregister application with IUCV.
* Returns:
* 0 on success, -EINVAL, if specified handle is invalid.
*/
int
iucv_unregister_program (iucv_handle_t handle)
{
handler *h = NULL;
struct list_head *lh;
int i;
ulong flags;
iucv_debug(1, "entering");
iucv_debug(1, "address of handler is %p", h);
/* Checking if handle is valid */
spin_lock_irqsave (&iucv_lock, flags);
list_for_each(lh, &iucv_handler_table) {
if ((handler *)handle == list_entry(lh, handler, list)) {
h = (handler *)handle;
break;
}
}
if (!h) {
spin_unlock_irqrestore (&iucv_lock, flags);
if (handle)
printk(KERN_WARNING
"%s: Handler not found in iucv_handler_table.\n",
__FUNCTION__);
else
printk(KERN_WARNING
"%s: NULL handle passed by application.\n",
__FUNCTION__);
return -EINVAL;
}
/**
* First, walk thru iucv_pathid_table and sever any pathid which is
* still pointing to the handler to be removed.
*/
for (i = 0; i < max_connections; i++)
if (iucv_pathid_table[i] == h) {
spin_unlock_irqrestore (&iucv_lock, flags);
iucv_sever(i, h->id.user_data);
spin_lock_irqsave(&iucv_lock, flags);
}
spin_unlock_irqrestore (&iucv_lock, flags);
iucv_remove_handler(h);
kfree(h);
iucv_debug(1, "exiting");
return 0;
}
/**
* iucv_accept:
* @pathid: Path identification number
* @msglim_reqstd: The number of outstanding messages requested.
* @user_data: Data specified by the iucv_connect function.
* @flags1: Contains options for this path.
* - IPPRTY (0x20) Specifies if you want to send priority message.
* - IPRMDATA (0x80) Specifies whether your program can handle a message
* in the parameter list.
* - IPQUSCE (0x40) Specifies whether you want to quiesce the path being
* established.
* @handle: Address of handler.
* @pgm_data: Application data passed to interrupt handlers.
* @flags1_out: Pointer to an int. If not NULL, on return the options for
* the path are stored at the given location:
* - IPPRTY (0x20) Indicates you may send a priority message.
* @msglim: Pointer to an __u16. If not NULL, on return the maximum
* number of outstanding messages is stored at the given
* location.
*
* This function is issued after the user receives a Connection Pending external
* interrupt and now wishes to complete the IUCV communication path.
* Returns:
* return code from CP
*/
int
iucv_accept(__u16 pathid, __u16 msglim_reqstd,
__u8 user_data[16], int flags1,
iucv_handle_t handle, void *pgm_data,
int *flags1_out, __u16 * msglim)
{
ulong b2f0_result = 0;
ulong flags;
struct list_head *lh;
handler *h = NULL;
iparml_control *parm;
iucv_debug(1, "entering");
iucv_debug(1, "pathid = %d", pathid);
/* Checking if handle is valid */
spin_lock_irqsave (&iucv_lock, flags);
list_for_each(lh, &iucv_handler_table) {
if ((handler *)handle == list_entry(lh, handler, list)) {
h = (handler *)handle;
break;
}
}
spin_unlock_irqrestore (&iucv_lock, flags);
if (!h) {
if (handle)
printk(KERN_WARNING
"%s: Handler not found in iucv_handler_table.\n",
__FUNCTION__);
else
printk(KERN_WARNING
"%s: NULL handle passed by application.\n",
__FUNCTION__);
return -EINVAL;
}
parm = (iparml_control *)grab_param();
parm->ippathid = pathid;
parm->ipmsglim = msglim_reqstd;
if (user_data)
memcpy(parm->ipuser, user_data, sizeof(parm->ipuser));
parm->ipflags1 = (__u8)flags1;
b2f0_result = b2f0(ACCEPT, parm);
if (!b2f0_result) {
if (msglim)
*msglim = parm->ipmsglim;
if (pgm_data)
h->pgm_data = pgm_data;
if (flags1_out)
*flags1_out = (parm->ipflags1 & IPPRTY) ? IPPRTY : 0;
}
release_param(parm);
iucv_debug(1, "exiting");
return b2f0_result;
}
/**
* iucv_connect:
* @pathid: Path identification number
* @msglim_reqstd: Number of outstanding messages requested
* @user_data: 16-byte user data
* @userid: 8-byte of user identification
* @system_name: 8-byte identifying the system name
* @flags1: Specifies options for this path:
* - IPPRTY (0x20) Specifies if you want to send priority message.
* - IPRMDATA (0x80) Specifies whether your program can handle a message
* in the parameter list.
* - IPQUSCE (0x40) Specifies whether you want to quiesce the path being
* established.
* - IPLOCAL (0x01) Allows an application to force the partner to be on the
* local system. If local is specified then target class
* cannot be specified.
* @flags1_out: Pointer to an int. If not NULL, on return the options for
* the path are stored at the given location:
* - IPPRTY (0x20) Indicates you may send a priority message.
* @msglim: Pointer to an __u16. If not NULL, on return the maximum
* number of outstanding messages is stored at the given
* location.
* @handle: Address of handler.
* @pgm_data: Application data to be passed to interrupt handlers.
*
* This function establishes an IUCV path. Although the connect may complete
* successfully, you are not able to use the path until you receive an IUCV
* Connection Complete external interrupt.
* Returns: return code from CP, or one of the following
* - ENOMEM
* - return code from iucv_declare_buffer
* - EINVAL - invalid handle passed by application
* - EINVAL - pathid address is NULL
* - ENOMEM - pathid table storage allocation failed
* - return code from internal function add_pathid
*/
int
iucv_connect (__u16 *pathid, __u16 msglim_reqstd,
__u8 user_data[16], __u8 userid[8],
__u8 system_name[8], int flags1,
int *flags1_out, __u16 * msglim,
iucv_handle_t handle, void *pgm_data)
{
iparml_control *parm;
iparml_control local_parm;
struct list_head *lh;
ulong b2f0_result = 0;
ulong flags;
int add_pathid_result = 0;
handler *h = NULL;
__u8 no_memory[16] = "NO MEMORY";
iucv_debug(1, "entering");
/* Checking if handle is valid */
spin_lock_irqsave (&iucv_lock, flags);
list_for_each(lh, &iucv_handler_table) {
if ((handler *)handle == list_entry(lh, handler, list)) {
h = (handler *)handle;
break;
}
}
spin_unlock_irqrestore (&iucv_lock, flags);
if (!h) {
if (handle)
printk(KERN_WARNING
"%s: Handler not found in iucv_handler_table.\n",
__FUNCTION__);
else
printk(KERN_WARNING
"%s: NULL handle passed by application.\n",
__FUNCTION__);
return -EINVAL;
}
if (pathid == NULL) {
printk(KERN_WARNING "%s: NULL pathid pointer\n",
__FUNCTION__);
return -EINVAL;
}
parm = (iparml_control *)grab_param();
parm->ipmsglim = msglim_reqstd;
if (user_data)
memcpy(parm->ipuser, user_data, sizeof(parm->ipuser));
if (userid) {
memcpy(parm->ipvmid, userid, sizeof(parm->ipvmid));
ASCEBC(parm->ipvmid, sizeof(parm->ipvmid));
EBC_TOUPPER(parm->ipvmid, sizeof(parm->ipvmid));
}
if (system_name) {
memcpy(parm->iptarget, system_name, sizeof(parm->iptarget));
ASCEBC(parm->iptarget, sizeof(parm->iptarget));
EBC_TOUPPER(parm->iptarget, sizeof(parm->iptarget));
}
/* In order to establish an IUCV connection, the procedure is:
*
* b2f0(CONNECT)
* take the ippathid from the b2f0 call
* register the handler to the ippathid
*
* Unfortunately, the ConnectionEstablished message gets sent after the
* b2f0(CONNECT) call but before the register is handled.
*
* In order for this race condition to be eliminated, the IUCV Control
* Interrupts must be disabled for the above procedure.
*
* David Kennedy <dkennedy@linuxcare.com>
*/
/* Enable everything but IUCV Control messages */
iucv_setmask(~(AllInterrupts));
messagesDisabled = 1;
spin_lock_irqsave (&iucv_lock, flags);
parm->ipflags1 = (__u8)flags1;
b2f0_result = b2f0(CONNECT, parm);
memcpy(&local_parm, parm, sizeof(local_parm));
release_param(parm);
parm = &local_parm;
if (!b2f0_result)
add_pathid_result = __iucv_add_pathid(parm->ippathid, h);
spin_unlock_irqrestore (&iucv_lock, flags);
if (b2f0_result) {
iucv_setmask(~0);
messagesDisabled = 0;
return b2f0_result;
}
*pathid = parm->ippathid;
/* Enable everything again */
iucv_setmask(IUCVControlInterruptsFlag);
if (msglim)
*msglim = parm->ipmsglim;
if (flags1_out)
*flags1_out = (parm->ipflags1 & IPPRTY) ? IPPRTY : 0;
if (add_pathid_result) {
iucv_sever(*pathid, no_memory);
printk(KERN_WARNING "%s: add_pathid failed with rc ="
" %d\n", __FUNCTION__, add_pathid_result);
return(add_pathid_result);
}
iucv_debug(1, "exiting");
return b2f0_result;
}
/**
* iucv_purge:
* @pathid: Path identification number
* @msgid: Message ID of message to purge.
* @srccls: Message class of the message to purge.
* @audit: Pointer to an __u32. If not NULL, on return, information about
* asynchronous errors that may have affected the normal completion
* of this message ist stored at the given location.
*
* Cancels a message you have sent.
* Returns: return code from CP
*/
int
iucv_purge (__u16 pathid, __u32 msgid, __u32 srccls, __u32 *audit)
{
iparml_purge *parm;
ulong b2f0_result = 0;
iucv_debug(1, "entering");
iucv_debug(1, "pathid = %d", pathid);
parm = (iparml_purge *)grab_param();
parm->ipmsgid = msgid;
parm->ippathid = pathid;
parm->ipsrccls = srccls;
parm->ipflags1 |= (IPSRCCLS | IPFGMID | IPFGPID);
b2f0_result = b2f0(PURGE, parm);
if (!b2f0_result && audit) {
memcpy(audit, parm->ipaudit, sizeof(parm->ipaudit));
/* parm->ipaudit has only 3 bytes */
*audit >>= 8;
}
release_param(parm);
iucv_debug(1, "b2f0_result = %ld", b2f0_result);
iucv_debug(1, "exiting");
return b2f0_result;
}
/**
* iucv_query_generic:
* @want_maxconn: Flag, describing which value is to be returned.
*
* Helper function for iucv_query_maxconn() and iucv_query_bufsize().
*
* Returns: The buffersize, if want_maxconn is 0; the maximum number of
* connections, if want_maxconn is 1 or an error-code < 0 on failure.
*/
static int
iucv_query_generic(int want_maxconn)
{
iparml_purge *parm = (iparml_purge *)grab_param();
int bufsize, maxconn;
int ccode;
/**
* Call b2f0 and store R0 (max buffer size),
* R1 (max connections) and CC.
*/
asm volatile (
"LRA 1,0(%4)\n\t"
"LR 0,%3\n\t"
".long 0xb2f01000\n\t"
"IPM %0\n\t"
"SRL %0,28\n\t"
"ST 0,%1\n\t"
"ST 1,%2\n\t"
: "=d" (ccode), "=m" (bufsize), "=m" (maxconn)
: "d" (QUERY), "a" (parm)
: "0", "1", "cc"
);
release_param(parm);
if (ccode)
return -EPERM;
if (want_maxconn)
return maxconn;
return bufsize;
}
/**
* iucv_query_maxconn:
*
* Determines the maximum number of connections thay may be established.
*
* Returns: Maximum number of connections that can be.
*/
ulong
iucv_query_maxconn(void)
{
return iucv_query_generic(1);
}
/**
* iucv_query_bufsize:
*
* Determines the size of the external interrupt buffer.
*
* Returns: Size of external interrupt buffer.
*/
ulong
iucv_query_bufsize (void)
{
return iucv_query_generic(0);
}
/**
* iucv_quiesce:
* @pathid: Path identification number
* @user_data: 16-byte user data
*
* Temporarily suspends incoming messages on an IUCV path.
* You can later reactivate the path by invoking the iucv_resume function.
* Returns: return code from CP
*/
int
iucv_quiesce (__u16 pathid, __u8 user_data[16])
{
iparml_control *parm;
ulong b2f0_result = 0;
iucv_debug(1, "entering");
iucv_debug(1, "pathid = %d", pathid);
parm = (iparml_control *)grab_param();
memcpy(parm->ipuser, user_data, sizeof(parm->ipuser));
parm->ippathid = pathid;
b2f0_result = b2f0(QUIESCE, parm);
release_param(parm);
iucv_debug(1, "b2f0_result = %ld", b2f0_result);
iucv_debug(1, "exiting");
return b2f0_result;
}
/**
* iucv_receive:
* @pathid: Path identification number.
* @buffer: Address of buffer to receive. Must be below 2G.
* @buflen: Length of buffer to receive.
* @msgid: Specifies the message ID.
* @trgcls: Specifies target class.
* @flags1_out: Receives options for path on return.
* - IPNORPY (0x10) Specifies whether a reply is required
* - IPPRTY (0x20) Specifies if you want to send priority message
* - IPRMDATA (0x80) Specifies the data is contained in the parameter list
* @residual_buffer: Receives the address of buffer updated by the number
* of bytes you have received on return.
* @residual_length: On return, receives one of the following values:
* - 0 If the receive buffer is the same length as
* the message.
* - Remaining bytes in buffer If the receive buffer is longer than the
* message.
* - Remaining bytes in message If the receive buffer is shorter than the
* message.
*
* This function receives messages that are being sent to you over established
* paths.
* Returns: return code from CP IUCV call; If the receive buffer is shorter
* than the message, always 5
* -EINVAL - buffer address is pointing to NULL
*/
int
iucv_receive (__u16 pathid, __u32 msgid, __u32 trgcls,
void *buffer, ulong buflen,
int *flags1_out, ulong * residual_buffer, ulong * residual_length)
{
iparml_db *parm;
ulong b2f0_result;
int moved = 0; /* number of bytes moved from parmlist to buffer */
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ipbfadr1 = (__u32) (addr_t) buffer;
parm->ipbfln1f = (__u32) ((ulong) buflen);
parm->ipmsgid = msgid;
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipflags1 = (IPFGPID | IPFGMID | IPFGMCL);
b2f0_result = b2f0(RECEIVE, parm);
if (!b2f0_result || b2f0_result == 5) {
if (flags1_out) {
iucv_debug(2, "*flags1_out = %d", *flags1_out);
*flags1_out = (parm->ipflags1 & (~0x07));
iucv_debug(2, "*flags1_out = %d", *flags1_out);
}
if (!(parm->ipflags1 & IPRMDATA)) { /*msg not in parmlist */
if (residual_length)
*residual_length = parm->ipbfln1f;
if (residual_buffer)
*residual_buffer = parm->ipbfadr1;
} else {
moved = min_t (unsigned long, buflen, 8);
memcpy ((char *) buffer,
(char *) &parm->ipbfadr1, moved);
if (buflen < 8)
b2f0_result = 5;
if (residual_length)
*residual_length = abs (buflen - 8);
if (residual_buffer)
*residual_buffer = (ulong) (buffer + moved);
}
}
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_receive_array
* Purpose: This function receives messages that are being sent to you
* over established paths.
* Input: pathid - path identification number
* buffer - address of array of buffers
* buflen - total length of buffers
* msgid - specifies the message ID.
* trgcls - specifies target class
* Output:
* flags1_out: Options for path.
* IPNORPY - 0x10 specifies whether a reply is required
* IPPRTY - 0x20 specifies if you want to send priority message
* IPRMDATA - 0x80 specifies the data is contained in the parameter list
* residual_buffer - address points to the current list entry IUCV
* is working on.
* residual_length -
* Contains one of the following values, if the receive buffer is:
* The same length as the message, this field is zero.
* Longer than the message, this field contains the number of
* bytes remaining in the buffer.
* Shorter than the message, this field contains the residual
* count (that is, the number of bytes remaining in the
* message that does not fit into the buffer. In this case
* b2f0_result = 5.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_receive_array (__u16 pathid,
__u32 msgid, __u32 trgcls,
iucv_array_t * buffer, ulong buflen,
int *flags1_out,
ulong * residual_buffer, ulong * residual_length)
{
iparml_db *parm;
ulong b2f0_result;
int i = 0, moved = 0, need_to_move = 8, dyn_len;
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ipbfadr1 = (__u32) ((ulong) buffer);
parm->ipbfln1f = (__u32) buflen;
parm->ipmsgid = msgid;
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipflags1 = (IPBUFLST | IPFGPID | IPFGMID | IPFGMCL);
b2f0_result = b2f0(RECEIVE, parm);
if (!b2f0_result || b2f0_result == 5) {
if (flags1_out) {
iucv_debug(2, "*flags1_out = %d", *flags1_out);
*flags1_out = (parm->ipflags1 & (~0x07));
iucv_debug(2, "*flags1_out = %d", *flags1_out);
}
if (!(parm->ipflags1 & IPRMDATA)) { /*msg not in parmlist */
if (residual_length)
*residual_length = parm->ipbfln1f;
if (residual_buffer)
*residual_buffer = parm->ipbfadr1;
} else {
/* copy msg from parmlist to users array. */
while ((moved < 8) && (moved < buflen)) {
dyn_len =
min_t (unsigned int,
(buffer + i)->length, need_to_move);
memcpy ((char *)((ulong)((buffer + i)->address)),
((char *) &parm->ipbfadr1) + moved,
dyn_len);
moved += dyn_len;
need_to_move -= dyn_len;
(buffer + i)->address =
(__u32)
((ulong)(__u8 *) ((ulong)(buffer + i)->address)
+ dyn_len);
(buffer + i)->length -= dyn_len;
i++;
}
if (need_to_move) /* buflen < 8 bytes */
b2f0_result = 5;
if (residual_length)
*residual_length = abs (buflen - 8);
if (residual_buffer) {
if (!moved)
*residual_buffer = (ulong) buffer;
else
*residual_buffer =
(ulong) (buffer + (i - 1));
}
}
}
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/**
* iucv_reject:
* @pathid: Path identification number.
* @msgid: Message ID of the message to reject.
* @trgcls: Target class of the message to reject.
* Returns: return code from CP
*
* Refuses a specified message. Between the time you are notified of a
* message and the time that you complete the message, the message may
* be rejected.
*/
int
iucv_reject (__u16 pathid, __u32 msgid, __u32 trgcls)
{
iparml_db *parm;
ulong b2f0_result = 0;
iucv_debug(1, "entering");
iucv_debug(1, "pathid = %d", pathid);
parm = (iparml_db *)grab_param();
parm->ippathid = pathid;
parm->ipmsgid = msgid;
parm->iptrgcls = trgcls;
parm->ipflags1 = (IPFGMCL | IPFGMID | IPFGPID);
b2f0_result = b2f0(REJECT, parm);
release_param(parm);
iucv_debug(1, "b2f0_result = %ld", b2f0_result);
iucv_debug(1, "exiting");
return b2f0_result;
}
/*
* Name: iucv_reply
* Purpose: This function responds to the two-way messages that you
* receive. You must identify completely the message to
* which you wish to reply. ie, pathid, msgid, and trgcls.
* Input: pathid - path identification number
* msgid - specifies the message ID.
* trgcls - specifies target class
* flags1 - option for path
* IPPRTY- 0x20 - specifies if you want to send priority message
* buffer - address of reply buffer
* buflen - length of reply buffer
* Output: ipbfadr2 - Address of buffer updated by the number
* of bytes you have moved.
* ipbfln2f - Contains one of the following values:
* If the answer buffer is the same length as the reply, this field
* contains zero.
* If the answer buffer is longer than the reply, this field contains
* the number of bytes remaining in the buffer.
* If the answer buffer is shorter than the reply, this field contains
* a residual count (that is, the number of bytes remianing in the
* reply that does not fit into the buffer. In this
* case b2f0_result = 5.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_reply (__u16 pathid,
__u32 msgid, __u32 trgcls,
int flags1,
void *buffer, ulong buflen, ulong * ipbfadr2, ulong * ipbfln2f)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ipbfadr2 = (__u32) ((ulong) buffer);
parm->ipbfln2f = (__u32) buflen; /* length of message */
parm->ippathid = pathid;
parm->ipmsgid = msgid;
parm->iptrgcls = trgcls;
parm->ipflags1 = (__u8) flags1; /* priority message */
b2f0_result = b2f0(REPLY, parm);
if ((!b2f0_result) || (b2f0_result == 5)) {
if (ipbfadr2)
*ipbfadr2 = parm->ipbfadr2;
if (ipbfln2f)
*ipbfln2f = parm->ipbfln2f;
}
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_reply_array
* Purpose: This function responds to the two-way messages that you
* receive. You must identify completely the message to
* which you wish to reply. ie, pathid, msgid, and trgcls.
* The array identifies a list of addresses and lengths of
* discontiguous buffers that contains the reply data.
* Input: pathid - path identification number
* msgid - specifies the message ID.
* trgcls - specifies target class
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* buffer - address of array of reply buffers
* buflen - total length of reply buffers
* Output: ipbfadr2 - Address of buffer which IUCV is currently working on.
* ipbfln2f - Contains one of the following values:
* If the answer buffer is the same length as the reply, this field
* contains zero.
* If the answer buffer is longer than the reply, this field contains
* the number of bytes remaining in the buffer.
* If the answer buffer is shorter than the reply, this field contains
* a residual count (that is, the number of bytes remianing in the
* reply that does not fit into the buffer. In this
* case b2f0_result = 5.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_reply_array (__u16 pathid,
__u32 msgid, __u32 trgcls,
int flags1,
iucv_array_t * buffer,
ulong buflen, ulong * ipbfadr2, ulong * ipbfln2f)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ipbfadr2 = (__u32) ((ulong) buffer);
parm->ipbfln2f = buflen; /* length of message */
parm->ippathid = pathid;
parm->ipmsgid = msgid;
parm->iptrgcls = trgcls;
parm->ipflags1 = (IPANSLST | flags1);
b2f0_result = b2f0(REPLY, parm);
if ((!b2f0_result) || (b2f0_result == 5)) {
if (ipbfadr2)
*ipbfadr2 = parm->ipbfadr2;
if (ipbfln2f)
*ipbfln2f = parm->ipbfln2f;
}
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_reply_prmmsg
* Purpose: This function responds to the two-way messages that you
* receive. You must identify completely the message to
* which you wish to reply. ie, pathid, msgid, and trgcls.
* Prmmsg signifies the data is moved into the
* parameter list.
* Input: pathid - path identification number
* msgid - specifies the message ID.
* trgcls - specifies target class
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* prmmsg - 8-bytes of data to be placed into the parameter
* list.
* Output: NA
* Return: b2f0_result - return code from CP
*/
int
iucv_reply_prmmsg (__u16 pathid,
__u32 msgid, __u32 trgcls, int flags1, __u8 prmmsg[8])
{
iparml_dpl *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
parm = (iparml_dpl *)grab_param();
parm->ippathid = pathid;
parm->ipmsgid = msgid;
parm->iptrgcls = trgcls;
memcpy(parm->iprmmsg, prmmsg, sizeof (parm->iprmmsg));
parm->ipflags1 = (IPRMDATA | flags1);
b2f0_result = b2f0(REPLY, parm);
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/**
* iucv_resume:
* @pathid: Path identification number
* @user_data: 16-byte of user data
*
* This function restores communication over a quiesced path.
* Returns: return code from CP
*/
int
iucv_resume (__u16 pathid, __u8 user_data[16])
{
iparml_control *parm;
ulong b2f0_result = 0;
iucv_debug(1, "entering");
iucv_debug(1, "pathid = %d", pathid);
parm = (iparml_control *)grab_param();
memcpy (parm->ipuser, user_data, sizeof (*user_data));
parm->ippathid = pathid;
b2f0_result = b2f0(RESUME, parm);
release_param(parm);
iucv_debug(1, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send
* Purpose: sends messages
* Input: pathid - ushort, pathid
* msgid - ulong *, id of message returned to caller
* trgcls - ulong, target message class
* srccls - ulong, source message class
* msgtag - ulong, message tag
* flags1 - Contains options for this path.
* IPPRTY - Ox20 - specifies if you want to send a priority message.
* buffer - pointer to buffer
* buflen - ulong, length of buffer
* Output: b2f0_result - return code from b2f0 call
* msgid - returns message id
*/
int
iucv_send (__u16 pathid, __u32 * msgid,
__u32 trgcls, __u32 srccls,
__u32 msgtag, int flags1, void *buffer, ulong buflen)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ipbfadr1 = (__u32) ((ulong) buffer);
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipbfln1f = (__u32) buflen; /* length of message */
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipflags1 = (IPNORPY | flags1); /* one way priority message */
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send_array
* Purpose: This function transmits data to another application.
* The contents of buffer is the address of the array of
* addresses and lengths of discontiguous buffers that hold
* the message text. This is a one-way message and the
* receiver will not reply to the message.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - specifies a tag to be associated witht the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* buffer - address of array of send buffers
* buflen - total length of send buffers
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_send_array (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls,
__u32 msgtag, int flags1, iucv_array_t * buffer, ulong buflen)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipbfadr1 = (__u32) ((ulong) buffer);
parm->ipbfln1f = (__u32) buflen; /* length of message */
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipflags1 = (IPNORPY | IPBUFLST | flags1);
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send_prmmsg
* Purpose: This function transmits data to another application.
* Prmmsg specifies that the 8-bytes of data are to be moved
* into the parameter list. This is a one-way message and the
* receiver will not reply to the message.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - specifies a tag to be associated with the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* prmmsg - 8-bytes of data to be placed into parameter list
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
*/
int
iucv_send_prmmsg (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls, __u32 msgtag, int flags1, __u8 prmmsg[8])
{
iparml_dpl *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
parm = (iparml_dpl *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipflags1 = (IPRMDATA | IPNORPY | flags1);
memcpy(parm->iprmmsg, prmmsg, sizeof(parm->iprmmsg));
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send2way
* Purpose: This function transmits data to another application.
* Data to be transmitted is in a buffer. The receiver
* of the send is expected to reply to the message and
* a buffer is provided into which IUCV moves the reply
* to this message.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - specifies a tag associated with the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* buffer - address of send buffer
* buflen - length of send buffer
* ansbuf - address of buffer to reply with
* anslen - length of buffer to reply with
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer or ansbuf address is NULL
*/
int
iucv_send2way (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls,
__u32 msgtag,
int flags1,
void *buffer, ulong buflen, void *ansbuf, ulong anslen)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer || !ansbuf)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipbfadr1 = (__u32) ((ulong) buffer);
parm->ipbfln1f = (__u32) buflen; /* length of message */
parm->ipbfadr2 = (__u32) ((ulong) ansbuf);
parm->ipbfln2f = (__u32) anslen;
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipflags1 = flags1; /* priority message */
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send2way_array
* Purpose: This function transmits data to another application.
* The contents of buffer is the address of the array of
* addresses and lengths of discontiguous buffers that hold
* the message text. The receiver of the send is expected to
* reply to the message and a buffer is provided into which
* IUCV moves the reply to this message.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - spcifies a tag to be associated with the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* buffer - address of array of send buffers
* buflen - total length of send buffers
* ansbuf - address of buffer to reply with
* anslen - length of buffer to reply with
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_send2way_array (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls,
__u32 msgtag,
int flags1,
iucv_array_t * buffer,
ulong buflen, iucv_array_t * ansbuf, ulong anslen)
{
iparml_db *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!buffer || !ansbuf)
return -EINVAL;
parm = (iparml_db *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipbfadr1 = (__u32) ((ulong) buffer);
parm->ipbfln1f = (__u32) buflen; /* length of message */
parm->ipbfadr2 = (__u32) ((ulong) ansbuf);
parm->ipbfln2f = (__u32) anslen;
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipflags1 = (IPBUFLST | IPANSLST | flags1);
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send2way_prmmsg
* Purpose: This function transmits data to another application.
* Prmmsg specifies that the 8-bytes of data are to be moved
* into the parameter list. This is a two-way message and the
* receiver of the message is expected to reply. A buffer
* is provided into which IUCV moves the reply to this
* message.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - specifies a tag to be associated with the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* prmmsg - 8-bytes of data to be placed in parameter list
* ansbuf - address of buffer to reply with
* anslen - length of buffer to reply with
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
* (-EINVAL) - buffer address is NULL
*/
int
iucv_send2way_prmmsg (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls,
__u32 msgtag,
ulong flags1, __u8 prmmsg[8], void *ansbuf, ulong anslen)
{
iparml_dpl *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!ansbuf)
return -EINVAL;
parm = (iparml_dpl *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipbfadr2 = (__u32) ((ulong) ansbuf);
parm->ipbfln2f = (__u32) anslen;
parm->ipflags1 = (IPRMDATA | flags1); /* message in prmlist */
memcpy(parm->iprmmsg, prmmsg, sizeof(parm->iprmmsg));
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
/*
* Name: iucv_send2way_prmmsg_array
* Purpose: This function transmits data to another application.
* Prmmsg specifies that the 8-bytes of data are to be moved
* into the parameter list. This is a two-way message and the
* receiver of the message is expected to reply. A buffer
* is provided into which IUCV moves the reply to this
* message. The contents of ansbuf is the address of the
* array of addresses and lengths of discontiguous buffers
* that contain the reply.
* Input: pathid - path identification number
* trgcls - specifies target class
* srccls - specifies the source message class
* msgtag - specifies a tag to be associated with the message
* flags1 - option for path
* IPPRTY- specifies if you want to send priority message
* prmmsg - 8-bytes of data to be placed into the parameter list
* ansbuf - address of buffer to reply with
* anslen - length of buffer to reply with
* Output: msgid - specifies the message ID.
* Return: b2f0_result - return code from CP
* (-EINVAL) - ansbuf address is NULL
*/
int
iucv_send2way_prmmsg_array (__u16 pathid,
__u32 * msgid,
__u32 trgcls,
__u32 srccls,
__u32 msgtag,
int flags1,
__u8 prmmsg[8],
iucv_array_t * ansbuf, ulong anslen)
{
iparml_dpl *parm;
ulong b2f0_result;
iucv_debug(2, "entering");
if (!ansbuf)
return -EINVAL;
parm = (iparml_dpl *)grab_param();
parm->ippathid = pathid;
parm->iptrgcls = trgcls;
parm->ipsrccls = srccls;
parm->ipmsgtag = msgtag;
parm->ipbfadr2 = (__u32) ((ulong) ansbuf);
parm->ipbfln2f = (__u32) anslen;
parm->ipflags1 = (IPRMDATA | IPANSLST | flags1);
memcpy(parm->iprmmsg, prmmsg, sizeof(parm->iprmmsg));
b2f0_result = b2f0(SEND, parm);
if ((!b2f0_result) && (msgid))
*msgid = parm->ipmsgid;
release_param(parm);
iucv_debug(2, "exiting");
return b2f0_result;
}
void
iucv_setmask_cpuid (void *result)
{
iparml_set_mask *parm;
iucv_debug(1, "entering");
parm = (iparml_set_mask *)grab_param();
parm->ipmask = *((__u8*)result);
*((ulong *)result) = b2f0(SETMASK, parm);
release_param(parm);
iucv_debug(1, "b2f0_result = %ld", *((ulong *)result));
iucv_debug(1, "exiting");
}
/*
* Name: iucv_setmask
* Purpose: This function enables or disables the following IUCV
* external interruptions: Nonpriority and priority message
* interrupts, nonpriority and priority reply interrupts.
* Input: SetMaskFlag - options for interrupts
* 0x80 - Nonpriority_MessagePendingInterruptsFlag
* 0x40 - Priority_MessagePendingInterruptsFlag
* 0x20 - Nonpriority_MessageCompletionInterruptsFlag
* 0x10 - Priority_MessageCompletionInterruptsFlag
* 0x08 - IUCVControlInterruptsFlag
* Output: NA
* Return: b2f0_result - return code from CP
*/
int
iucv_setmask (int SetMaskFlag)
{
union {
ulong result;
__u8 param;
} u;
int cpu;
u.param = SetMaskFlag;
cpu = get_cpu();
smp_call_function_on(iucv_setmask_cpuid, &u, 0, 1, iucv_cpuid);
put_cpu();
return u.result;
}
/**
* iucv_sever:
* @pathid: Path identification number
* @user_data: 16-byte of user data
*
* This function terminates an iucv path.
* Returns: return code from CP
*/
int
iucv_sever(__u16 pathid, __u8 user_data[16])
{
iparml_control *parm;
ulong b2f0_result = 0;
iucv_debug(1, "entering");
parm = (iparml_control *)grab_param();
memcpy(parm->ipuser, user_data, sizeof(parm->ipuser));
parm->ippathid = pathid;
b2f0_result = b2f0(SEVER, parm);
if (!b2f0_result)
iucv_remove_pathid(pathid);
release_param(parm);
iucv_debug(1, "exiting");
return b2f0_result;
}
/*
* Interrupt Handlers
*******************************************************************************/
/**
* iucv_irq_handler:
* @regs: Current registers
* @code: irq code
*
* Handles external interrupts coming in from CP.
* Places the interrupt buffer on a queue and schedules iucv_tasklet_handler().
*/
static void
iucv_irq_handler(struct pt_regs *regs, __u16 code)
{
iucv_irqdata *irqdata;
irqdata = kmalloc(sizeof(iucv_irqdata), GFP_ATOMIC);
if (!irqdata) {
printk(KERN_WARNING "%s: out of memory\n", __FUNCTION__);
return;
}
memcpy(&irqdata->data, iucv_external_int_buffer,
sizeof(iucv_GeneralInterrupt));
spin_lock(&iucv_irq_queue_lock);
list_add_tail(&irqdata->queue, &iucv_irq_queue);
spin_unlock(&iucv_irq_queue_lock);
tasklet_schedule(&iucv_tasklet);
}
/**
* iucv_do_int:
* @int_buf: Pointer to copy of external interrupt buffer
*
* The workhorse for handling interrupts queued by iucv_irq_handler().
* This function is called from the bottom half iucv_tasklet_handler().
*/
static void
iucv_do_int(iucv_GeneralInterrupt * int_buf)
{
handler *h = NULL;
struct list_head *lh;
ulong flags;
iucv_interrupt_ops_t *interrupt = NULL; /* interrupt addresses */
__u8 temp_buff1[24], temp_buff2[24]; /* masked handler id. */
int rc = 0, j = 0;
__u8 no_listener[16] = "NO LISTENER";
iucv_debug(2, "entering, pathid %d, type %02X",
int_buf->ippathid, int_buf->iptype);
iucv_dumpit("External Interrupt Buffer:",
int_buf, sizeof(iucv_GeneralInterrupt));
ASCEBC (no_listener, 16);
if (int_buf->iptype != 01) {
if ((int_buf->ippathid) > (max_connections - 1)) {
printk(KERN_WARNING "%s: Got interrupt with pathid %d"
" > max_connections (%ld)\n", __FUNCTION__,
int_buf->ippathid, max_connections - 1);
} else {
h = iucv_pathid_table[int_buf->ippathid];
interrupt = h->interrupt_table;
iucv_dumpit("Handler:", h, sizeof(handler));
}
}
/* end of if statement */
switch (int_buf->iptype) {
case 0x01: /* connection pending */
if (messagesDisabled) {
iucv_setmask(~0);
messagesDisabled = 0;
}
spin_lock_irqsave(&iucv_lock, flags);
list_for_each(lh, &iucv_handler_table) {
h = list_entry(lh, handler, list);
memcpy(temp_buff1, &(int_buf->ipvmid), 24);
memcpy(temp_buff2, &(h->id.userid), 24);
for (j = 0; j < 24; j++) {
temp_buff1[j] &= (h->id.mask)[j];
temp_buff2[j] &= (h->id.mask)[j];
}
iucv_dumpit("temp_buff1:",
temp_buff1, sizeof(temp_buff1));
iucv_dumpit("temp_buff2",
temp_buff2, sizeof(temp_buff2));
if (!memcmp (temp_buff1, temp_buff2, 24)) {
iucv_debug(2,
"found a matching handler");
break;
} else
h = NULL;
}
spin_unlock_irqrestore (&iucv_lock, flags);
if (h) {
/* ADD PATH TO PATHID TABLE */
rc = iucv_add_pathid(int_buf->ippathid, h);
if (rc) {
iucv_sever (int_buf->ippathid,
no_listener);
iucv_debug(1,
"add_pathid failed, rc = %d",
rc);
} else {
interrupt = h->interrupt_table;
if (interrupt->ConnectionPending) {
EBCASC (int_buf->ipvmid, 8);
interrupt->ConnectionPending(
(iucv_ConnectionPending *)int_buf,
h->pgm_data);
} else
iucv_sever(int_buf->ippathid,
no_listener);
}
} else
iucv_sever(int_buf->ippathid, no_listener);
break;
case 0x02: /*connection complete */
if (messagesDisabled) {
iucv_setmask(~0);
messagesDisabled = 0;
}
if (h) {
if (interrupt->ConnectionComplete)
{
interrupt->ConnectionComplete(
(iucv_ConnectionComplete *)int_buf,
h->pgm_data);
}
else
iucv_debug(1,
"ConnectionComplete not called");
} else
iucv_sever(int_buf->ippathid, no_listener);
break;
case 0x03: /* connection severed */
if (messagesDisabled) {
iucv_setmask(~0);
messagesDisabled = 0;
}
if (h) {
if (interrupt->ConnectionSevered)
interrupt->ConnectionSevered(
(iucv_ConnectionSevered *)int_buf,
h->pgm_data);
else
iucv_sever (int_buf->ippathid, no_listener);
} else
iucv_sever(int_buf->ippathid, no_listener);
break;
case 0x04: /* connection quiesced */
if (messagesDisabled) {
iucv_setmask(~0);
messagesDisabled = 0;
}
if (h) {
if (interrupt->ConnectionQuiesced)
interrupt->ConnectionQuiesced(
(iucv_ConnectionQuiesced *)int_buf,
h->pgm_data);
else
iucv_debug(1,
"ConnectionQuiesced not called");
}
break;
case 0x05: /* connection resumed */
if (messagesDisabled) {
iucv_setmask(~0);
messagesDisabled = 0;
}
if (h) {
if (interrupt->ConnectionResumed)
interrupt->ConnectionResumed(
(iucv_ConnectionResumed *)int_buf,
h->pgm_data);
else
iucv_debug(1,
"ConnectionResumed not called");
}
break;
case 0x06: /* priority message complete */
case 0x07: /* nonpriority message complete */
if (h) {
if (interrupt->MessageComplete)
interrupt->MessageComplete(
(iucv_MessageComplete *)int_buf,
h->pgm_data);
else
iucv_debug(2,
"MessageComplete not called");
}
break;
case 0x08: /* priority message pending */
case 0x09: /* nonpriority message pending */
if (h) {
if (interrupt->MessagePending)
interrupt->MessagePending(
(iucv_MessagePending *) int_buf,
h->pgm_data);
else
iucv_debug(2,
"MessagePending not called");
}
break;
default: /* unknown iucv type */
printk(KERN_WARNING "%s: unknown iucv interrupt\n",
__FUNCTION__);
break;
} /* end switch */
iucv_debug(2, "exiting pathid %d, type %02X",
int_buf->ippathid, int_buf->iptype);
return;
}
/**
* iucv_tasklet_handler:
*
* This function loops over the queue of irq buffers and runs iucv_do_int()
* on every queue element.
*/
static void
iucv_tasklet_handler(unsigned long ignored)
{
struct list_head head;
struct list_head *next;
ulong flags;
spin_lock_irqsave(&iucv_irq_queue_lock, flags);
list_add(&head, &iucv_irq_queue);
list_del_init(&iucv_irq_queue);
spin_unlock_irqrestore (&iucv_irq_queue_lock, flags);
next = head.next;
while (next != &head) {
iucv_irqdata *p = list_entry(next, iucv_irqdata, queue);
next = next->next;
iucv_do_int(&p->data);
kfree(p);
}
return;
}
subsys_initcall(iucv_init);
module_exit(iucv_exit);
/**
* Export all public stuff
*/
EXPORT_SYMBOL (iucv_bus);
EXPORT_SYMBOL (iucv_root);
EXPORT_SYMBOL (iucv_accept);
EXPORT_SYMBOL (iucv_connect);
#if 0
EXPORT_SYMBOL (iucv_purge);
EXPORT_SYMBOL (iucv_query_maxconn);
EXPORT_SYMBOL (iucv_query_bufsize);
EXPORT_SYMBOL (iucv_quiesce);
#endif
EXPORT_SYMBOL (iucv_receive);
#if 0
EXPORT_SYMBOL (iucv_receive_array);
#endif
EXPORT_SYMBOL (iucv_reject);
#if 0
EXPORT_SYMBOL (iucv_reply);
EXPORT_SYMBOL (iucv_reply_array);
EXPORT_SYMBOL (iucv_resume);
#endif
EXPORT_SYMBOL (iucv_reply_prmmsg);
EXPORT_SYMBOL (iucv_send);
EXPORT_SYMBOL (iucv_send2way);
EXPORT_SYMBOL (iucv_send2way_array);
EXPORT_SYMBOL (iucv_send2way_prmmsg);
EXPORT_SYMBOL (iucv_send2way_prmmsg_array);
#if 0
EXPORT_SYMBOL (iucv_send_array);
EXPORT_SYMBOL (iucv_send_prmmsg);
EXPORT_SYMBOL (iucv_setmask);
#endif
EXPORT_SYMBOL (iucv_sever);
EXPORT_SYMBOL (iucv_register_program);
EXPORT_SYMBOL (iucv_unregister_program);
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