319cb083cc
READ/WRITE seems to be a bit too generic for defines in a device driver.
Just rename them to READ_CHANNEL/WRITE_CHANNEL which should suffice.
Fixes this:
In file included from drivers/s390/net/claw.c:93:
drivers/s390/net/claw.h:78:1: warning: "WRITE" redefined
In file included from /home2/heicarst/linux-2.6/arch/s390/include/asm/debug.h:12,
from drivers/s390/net/claw.c:68:
include/linux/fs.h:156:1: warning: this is the location of the previous definition
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3433 lines
115 KiB
C
3433 lines
115 KiB
C
/*
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* drivers/s390/net/claw.c
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* ESCON CLAW network driver
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*
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* Linux for zSeries version
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* Copyright IBM Corp. 2002, 2009
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* Author(s) Original code written by:
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* Kazuo Iimura <iimura@jp.ibm.com>
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* Rewritten by
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* Andy Richter <richtera@us.ibm.com>
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* Marc Price <mwprice@us.ibm.com>
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*
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* sysfs parms:
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* group x.x.rrrr,x.x.wwww
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* read_buffer nnnnnnn
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* write_buffer nnnnnn
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* host_name aaaaaaaa
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* adapter_name aaaaaaaa
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* api_type aaaaaaaa
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*
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* eg.
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* group 0.0.0200 0.0.0201
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* read_buffer 25
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* write_buffer 20
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* host_name LINUX390
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* adapter_name RS6K
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* api_type TCPIP
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*
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* where
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*
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* The device id is decided by the order entries
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* are added to the group the first is claw0 the second claw1
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* up to CLAW_MAX_DEV
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*
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* rrrr - the first of 2 consecutive device addresses used for the
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* CLAW protocol.
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* The specified address is always used as the input (Read)
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* channel and the next address is used as the output channel.
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*
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* wwww - the second of 2 consecutive device addresses used for
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* the CLAW protocol.
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* The specified address is always used as the output
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* channel and the previous address is used as the input channel.
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*
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* read_buffer - specifies number of input buffers to allocate.
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* write_buffer - specifies number of output buffers to allocate.
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* host_name - host name
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* adaptor_name - adaptor name
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* api_type - API type TCPIP or API will be sent and expected
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* as ws_name
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*
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* Note the following requirements:
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* 1) host_name must match the configured adapter_name on the remote side
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* 2) adaptor_name must match the configured host name on the remote side
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*
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* Change History
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* 1.00 Initial release shipped
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* 1.10 Changes for Buffer allocation
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* 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
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* 1.25 Added Packing support
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* 1.5
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*/
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#define KMSG_COMPONENT "claw"
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#include <asm/ccwdev.h>
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#include <asm/ccwgroup.h>
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#include <asm/debug.h>
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#include <asm/idals.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <linux/ctype.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/tcp.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include "claw.h"
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/*
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CLAW uses the s390dbf file system see claw_trace and claw_setup
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*/
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static char version[] __initdata = "CLAW driver";
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static char debug_buffer[255];
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/**
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* Debug Facility Stuff
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*/
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static debug_info_t *claw_dbf_setup;
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static debug_info_t *claw_dbf_trace;
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/**
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* CLAW Debug Facility functions
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*/
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static void
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claw_unregister_debug_facility(void)
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{
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if (claw_dbf_setup)
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debug_unregister(claw_dbf_setup);
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if (claw_dbf_trace)
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debug_unregister(claw_dbf_trace);
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}
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static int
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claw_register_debug_facility(void)
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{
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claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
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claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
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if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
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claw_unregister_debug_facility();
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return -ENOMEM;
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}
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debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
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debug_set_level(claw_dbf_setup, 2);
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debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
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debug_set_level(claw_dbf_trace, 2);
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return 0;
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}
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static inline void
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claw_set_busy(struct net_device *dev)
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{
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((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
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eieio();
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}
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static inline void
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claw_clear_busy(struct net_device *dev)
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{
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clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
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netif_wake_queue(dev);
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eieio();
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}
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static inline int
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claw_check_busy(struct net_device *dev)
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{
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eieio();
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return ((struct claw_privbk *) dev->ml_priv)->tbusy;
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}
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static inline void
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claw_setbit_busy(int nr,struct net_device *dev)
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{
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netif_stop_queue(dev);
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set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
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}
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static inline void
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claw_clearbit_busy(int nr,struct net_device *dev)
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{
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clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
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netif_wake_queue(dev);
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}
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static inline int
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claw_test_and_setbit_busy(int nr,struct net_device *dev)
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{
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netif_stop_queue(dev);
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return test_and_set_bit(nr,
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(void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
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}
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/* Functions for the DEV methods */
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static int claw_probe(struct ccwgroup_device *cgdev);
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static void claw_remove_device(struct ccwgroup_device *cgdev);
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static void claw_purge_skb_queue(struct sk_buff_head *q);
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static int claw_new_device(struct ccwgroup_device *cgdev);
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static int claw_shutdown_device(struct ccwgroup_device *cgdev);
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static int claw_tx(struct sk_buff *skb, struct net_device *dev);
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static int claw_change_mtu( struct net_device *dev, int new_mtu);
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static int claw_open(struct net_device *dev);
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static void claw_irq_handler(struct ccw_device *cdev,
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unsigned long intparm, struct irb *irb);
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static void claw_irq_tasklet ( unsigned long data );
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static int claw_release(struct net_device *dev);
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static void claw_write_retry ( struct chbk * p_ch );
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static void claw_write_next ( struct chbk * p_ch );
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static void claw_timer ( struct chbk * p_ch );
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/* Functions */
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static int add_claw_reads(struct net_device *dev,
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struct ccwbk* p_first, struct ccwbk* p_last);
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static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
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static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
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static int find_link(struct net_device *dev, char *host_name, char *ws_name );
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static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
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static int init_ccw_bk(struct net_device *dev);
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static void probe_error( struct ccwgroup_device *cgdev);
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static struct net_device_stats *claw_stats(struct net_device *dev);
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static int pages_to_order_of_mag(int num_of_pages);
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static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
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/* sysfs Functions */
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static ssize_t claw_hname_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t claw_hname_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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static ssize_t claw_adname_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t claw_adname_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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static ssize_t claw_apname_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t claw_apname_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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static ssize_t claw_wbuff_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t claw_wbuff_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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static ssize_t claw_rbuff_show(struct device *dev,
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struct device_attribute *attr, char *buf);
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static ssize_t claw_rbuff_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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static int claw_add_files(struct device *dev);
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static void claw_remove_files(struct device *dev);
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/* Functions for System Validate */
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static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
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static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
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__u8 correlator, __u8 rc , char *local_name, char *remote_name);
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static int claw_snd_conn_req(struct net_device *dev, __u8 link);
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static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
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static int claw_snd_sys_validate_rsp(struct net_device *dev,
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struct clawctl * p_ctl, __u32 return_code);
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static int claw_strt_conn_req(struct net_device *dev );
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static void claw_strt_read(struct net_device *dev, int lock);
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static void claw_strt_out_IO(struct net_device *dev);
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static void claw_free_wrt_buf(struct net_device *dev);
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/* Functions for unpack reads */
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static void unpack_read(struct net_device *dev);
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static int claw_pm_prepare(struct ccwgroup_device *gdev)
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{
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return -EPERM;
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}
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/* the root device for claw group devices */
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static struct device *claw_root_dev;
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/* ccwgroup table */
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static struct ccwgroup_driver claw_group_driver = {
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.owner = THIS_MODULE,
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.name = "claw",
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.max_slaves = 2,
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.driver_id = 0xC3D3C1E6,
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.probe = claw_probe,
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.remove = claw_remove_device,
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.set_online = claw_new_device,
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.set_offline = claw_shutdown_device,
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.prepare = claw_pm_prepare,
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};
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static struct ccw_device_id claw_ids[] = {
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{CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
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{},
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};
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MODULE_DEVICE_TABLE(ccw, claw_ids);
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static struct ccw_driver claw_ccw_driver = {
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.owner = THIS_MODULE,
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.name = "claw",
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.ids = claw_ids,
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.probe = ccwgroup_probe_ccwdev,
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.remove = ccwgroup_remove_ccwdev,
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};
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static ssize_t
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claw_driver_group_store(struct device_driver *ddrv, const char *buf,
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size_t count)
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{
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int err;
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err = ccwgroup_create_from_string(claw_root_dev,
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claw_group_driver.driver_id,
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&claw_ccw_driver, 2, buf);
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return err ? err : count;
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}
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static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
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static struct attribute *claw_group_attrs[] = {
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&driver_attr_group.attr,
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NULL,
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};
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static struct attribute_group claw_group_attr_group = {
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.attrs = claw_group_attrs,
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};
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static const struct attribute_group *claw_group_attr_groups[] = {
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&claw_group_attr_group,
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NULL,
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};
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/*
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* Key functions
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*/
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/*----------------------------------------------------------------*
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* claw_probe *
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* this function is called for each CLAW device. *
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*----------------------------------------------------------------*/
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static int
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claw_probe(struct ccwgroup_device *cgdev)
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{
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int rc;
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struct claw_privbk *privptr=NULL;
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CLAW_DBF_TEXT(2, setup, "probe");
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if (!get_device(&cgdev->dev))
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return -ENODEV;
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privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
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dev_set_drvdata(&cgdev->dev, privptr);
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if (privptr == NULL) {
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probe_error(cgdev);
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put_device(&cgdev->dev);
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CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
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return -ENOMEM;
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}
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privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
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privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
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if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
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probe_error(cgdev);
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put_device(&cgdev->dev);
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CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
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return -ENOMEM;
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}
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memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
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memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
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memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
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privptr->p_env->packing = 0;
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privptr->p_env->write_buffers = 5;
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privptr->p_env->read_buffers = 5;
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privptr->p_env->read_size = CLAW_FRAME_SIZE;
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privptr->p_env->write_size = CLAW_FRAME_SIZE;
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rc = claw_add_files(&cgdev->dev);
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if (rc) {
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probe_error(cgdev);
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put_device(&cgdev->dev);
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dev_err(&cgdev->dev, "Creating the /proc files for a new"
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" CLAW device failed\n");
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CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
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return rc;
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}
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privptr->p_env->p_priv = privptr;
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cgdev->cdev[0]->handler = claw_irq_handler;
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cgdev->cdev[1]->handler = claw_irq_handler;
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CLAW_DBF_TEXT(2, setup, "prbext 0");
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return 0;
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} /* end of claw_probe */
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|
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/*-------------------------------------------------------------------*
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* claw_tx *
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*-------------------------------------------------------------------*/
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static int
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claw_tx(struct sk_buff *skb, struct net_device *dev)
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{
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int rc;
|
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struct claw_privbk *privptr = dev->ml_priv;
|
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unsigned long saveflags;
|
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struct chbk *p_ch;
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|
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CLAW_DBF_TEXT(4, trace, "claw_tx");
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p_ch = &privptr->channel[WRITE_CHANNEL];
|
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spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
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rc=claw_hw_tx( skb, dev, 1 );
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spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
|
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CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
|
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if (rc)
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rc = NETDEV_TX_BUSY;
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else
|
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rc = NETDEV_TX_OK;
|
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return rc;
|
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} /* end of claw_tx */
|
|
|
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/*------------------------------------------------------------------*
|
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* pack the collect queue into an skb and return it *
|
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* If not packing just return the top skb from the queue *
|
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*------------------------------------------------------------------*/
|
|
|
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static struct sk_buff *
|
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claw_pack_skb(struct claw_privbk *privptr)
|
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{
|
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struct sk_buff *new_skb,*held_skb;
|
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struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
|
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struct claw_env *p_env = privptr->p_env;
|
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int pkt_cnt,pk_ind,so_far;
|
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|
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new_skb = NULL; /* assume no dice */
|
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pkt_cnt = 0;
|
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CLAW_DBF_TEXT(4, trace, "PackSKBe");
|
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if (!skb_queue_empty(&p_ch->collect_queue)) {
|
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/* some data */
|
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held_skb = skb_dequeue(&p_ch->collect_queue);
|
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if (held_skb)
|
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dev_kfree_skb_any(held_skb);
|
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else
|
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return NULL;
|
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if (p_env->packing != DO_PACKED)
|
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return held_skb;
|
|
/* get a new SKB we will pack at least one */
|
|
new_skb = dev_alloc_skb(p_env->write_size);
|
|
if (new_skb == NULL) {
|
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atomic_inc(&held_skb->users);
|
|
skb_queue_head(&p_ch->collect_queue,held_skb);
|
|
return NULL;
|
|
}
|
|
/* we have packed packet and a place to put it */
|
|
pk_ind = 1;
|
|
so_far = 0;
|
|
new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
|
|
while ((pk_ind) && (held_skb != NULL)) {
|
|
if (held_skb->len+so_far <= p_env->write_size-8) {
|
|
memcpy(skb_put(new_skb,held_skb->len),
|
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held_skb->data,held_skb->len);
|
|
privptr->stats.tx_packets++;
|
|
so_far += held_skb->len;
|
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pkt_cnt++;
|
|
dev_kfree_skb_any(held_skb);
|
|
held_skb = skb_dequeue(&p_ch->collect_queue);
|
|
if (held_skb)
|
|
atomic_dec(&held_skb->users);
|
|
} else {
|
|
pk_ind = 0;
|
|
atomic_inc(&held_skb->users);
|
|
skb_queue_head(&p_ch->collect_queue,held_skb);
|
|
}
|
|
}
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "PackSKBx");
|
|
return new_skb;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_change_mtu *
|
|
* *
|
|
*-------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
struct claw_privbk *privptr = dev->ml_priv;
|
|
int buff_size;
|
|
CLAW_DBF_TEXT(4, trace, "setmtu");
|
|
buff_size = privptr->p_env->write_size;
|
|
if ((new_mtu < 60) || (new_mtu > buff_size)) {
|
|
return -EINVAL;
|
|
}
|
|
dev->mtu = new_mtu;
|
|
return 0;
|
|
} /* end of claw_change_mtu */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_open *
|
|
* *
|
|
*-------------------------------------------------------------------*/
|
|
static int
|
|
claw_open(struct net_device *dev)
|
|
{
|
|
|
|
int rc;
|
|
int i;
|
|
unsigned long saveflags=0;
|
|
unsigned long parm;
|
|
struct claw_privbk *privptr;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct timer_list timer;
|
|
struct ccwbk *p_buf;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "open");
|
|
privptr = (struct claw_privbk *)dev->ml_priv;
|
|
/* allocate and initialize CCW blocks */
|
|
if (privptr->buffs_alloc == 0) {
|
|
rc=init_ccw_bk(dev);
|
|
if (rc) {
|
|
CLAW_DBF_TEXT(2, trace, "openmem");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
privptr->system_validate_comp=0;
|
|
privptr->release_pend=0;
|
|
if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
|
|
privptr->p_env->read_size=DEF_PACK_BUFSIZE;
|
|
privptr->p_env->write_size=DEF_PACK_BUFSIZE;
|
|
privptr->p_env->packing=PACKING_ASK;
|
|
} else {
|
|
privptr->p_env->packing=0;
|
|
privptr->p_env->read_size=CLAW_FRAME_SIZE;
|
|
privptr->p_env->write_size=CLAW_FRAME_SIZE;
|
|
}
|
|
claw_set_busy(dev);
|
|
tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
|
|
(unsigned long) &privptr->channel[READ_CHANNEL]);
|
|
for ( i = 0; i < 2; i++) {
|
|
CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
|
|
init_waitqueue_head(&privptr->channel[i].wait);
|
|
/* skb_queue_head_init(&p_ch->io_queue); */
|
|
if (i == WRITE_CHANNEL)
|
|
skb_queue_head_init(
|
|
&privptr->channel[WRITE_CHANNEL].collect_queue);
|
|
privptr->channel[i].flag_a = 0;
|
|
privptr->channel[i].IO_active = 0;
|
|
privptr->channel[i].flag &= ~CLAW_TIMER;
|
|
init_timer(&timer);
|
|
timer.function = (void *)claw_timer;
|
|
timer.data = (unsigned long)(&privptr->channel[i]);
|
|
timer.expires = jiffies + 15*HZ;
|
|
add_timer(&timer);
|
|
spin_lock_irqsave(get_ccwdev_lock(
|
|
privptr->channel[i].cdev), saveflags);
|
|
parm = (unsigned long) &privptr->channel[i];
|
|
privptr->channel[i].claw_state = CLAW_START_HALT_IO;
|
|
rc = 0;
|
|
add_wait_queue(&privptr->channel[i].wait, &wait);
|
|
rc = ccw_device_halt(
|
|
(struct ccw_device *)privptr->channel[i].cdev,parm);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irqrestore(
|
|
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
|
|
schedule();
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&privptr->channel[i].wait, &wait);
|
|
if(rc != 0)
|
|
ccw_check_return_code(privptr->channel[i].cdev, rc);
|
|
if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
|
|
del_timer(&timer);
|
|
}
|
|
if ((((privptr->channel[READ_CHANNEL].last_dstat |
|
|
privptr->channel[WRITE_CHANNEL].last_dstat) &
|
|
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
|
|
(((privptr->channel[READ_CHANNEL].flag |
|
|
privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
|
|
dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
|
|
"%s: remote side is not ready\n", dev->name);
|
|
CLAW_DBF_TEXT(2, trace, "notrdy");
|
|
|
|
for ( i = 0; i < 2; i++) {
|
|
spin_lock_irqsave(
|
|
get_ccwdev_lock(privptr->channel[i].cdev),
|
|
saveflags);
|
|
parm = (unsigned long) &privptr->channel[i];
|
|
privptr->channel[i].claw_state = CLAW_STOP;
|
|
rc = ccw_device_halt(
|
|
(struct ccw_device *)&privptr->channel[i].cdev,
|
|
parm);
|
|
spin_unlock_irqrestore(
|
|
get_ccwdev_lock(privptr->channel[i].cdev),
|
|
saveflags);
|
|
if (rc != 0) {
|
|
ccw_check_return_code(
|
|
privptr->channel[i].cdev, rc);
|
|
}
|
|
}
|
|
free_pages((unsigned long)privptr->p_buff_ccw,
|
|
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
|
|
if (privptr->p_env->read_size < PAGE_SIZE) {
|
|
free_pages((unsigned long)privptr->p_buff_read,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_read_num));
|
|
}
|
|
else {
|
|
p_buf=privptr->p_read_active_first;
|
|
while (p_buf!=NULL) {
|
|
free_pages((unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perread ));
|
|
p_buf=p_buf->next;
|
|
}
|
|
}
|
|
if (privptr->p_env->write_size < PAGE_SIZE ) {
|
|
free_pages((unsigned long)privptr->p_buff_write,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_write_num));
|
|
}
|
|
else {
|
|
p_buf=privptr->p_write_active_first;
|
|
while (p_buf!=NULL) {
|
|
free_pages((unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perwrite ));
|
|
p_buf=p_buf->next;
|
|
}
|
|
}
|
|
privptr->buffs_alloc = 0;
|
|
privptr->channel[READ_CHANNEL].flag = 0x00;
|
|
privptr->channel[WRITE_CHANNEL].flag = 0x00;
|
|
privptr->p_buff_ccw=NULL;
|
|
privptr->p_buff_read=NULL;
|
|
privptr->p_buff_write=NULL;
|
|
claw_clear_busy(dev);
|
|
CLAW_DBF_TEXT(2, trace, "open EIO");
|
|
return -EIO;
|
|
}
|
|
|
|
/* Send SystemValidate command */
|
|
|
|
claw_clear_busy(dev);
|
|
CLAW_DBF_TEXT(4, trace, "openok");
|
|
return 0;
|
|
} /* end of claw_open */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* claw_irq_handler *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static void
|
|
claw_irq_handler(struct ccw_device *cdev,
|
|
unsigned long intparm, struct irb *irb)
|
|
{
|
|
struct chbk *p_ch = NULL;
|
|
struct claw_privbk *privptr = NULL;
|
|
struct net_device *dev = NULL;
|
|
struct claw_env *p_env;
|
|
struct chbk *p_ch_r=NULL;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "clawirq");
|
|
/* Bypass all 'unsolicited interrupts' */
|
|
privptr = dev_get_drvdata(&cdev->dev);
|
|
if (!privptr) {
|
|
dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
|
|
" IRQ, c-%02x d-%02x\n",
|
|
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
|
|
CLAW_DBF_TEXT(2, trace, "badirq");
|
|
return;
|
|
}
|
|
|
|
/* Try to extract channel from driver data. */
|
|
if (privptr->channel[READ_CHANNEL].cdev == cdev)
|
|
p_ch = &privptr->channel[READ_CHANNEL];
|
|
else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
|
|
p_ch = &privptr->channel[WRITE_CHANNEL];
|
|
else {
|
|
dev_warn(&cdev->dev, "The device is not a CLAW device\n");
|
|
CLAW_DBF_TEXT(2, trace, "badchan");
|
|
return;
|
|
}
|
|
CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
|
|
|
|
dev = (struct net_device *) (p_ch->ndev);
|
|
p_env=privptr->p_env;
|
|
|
|
/* Copy interruption response block. */
|
|
memcpy(p_ch->irb, irb, sizeof(struct irb));
|
|
|
|
/* Check for good subchannel return code, otherwise info message */
|
|
if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
|
|
dev_info(&cdev->dev,
|
|
"%s: subchannel check for device: %04x -"
|
|
" Sch Stat %02x Dev Stat %02x CPA - %04x\n",
|
|
dev->name, p_ch->devno,
|
|
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
|
|
irb->scsw.cmd.cpa);
|
|
CLAW_DBF_TEXT(2, trace, "chanchk");
|
|
/* return; */
|
|
}
|
|
|
|
/* Check the reason-code of a unit check */
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
|
|
ccw_check_unit_check(p_ch, irb->ecw[0]);
|
|
|
|
/* State machine to bring the connection up, down and to restart */
|
|
p_ch->last_dstat = irb->scsw.cmd.dstat;
|
|
|
|
switch (p_ch->claw_state) {
|
|
case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
|
|
if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
|
|
(p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
|
|
(p_ch->irb->scsw.cmd.stctl ==
|
|
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
|
|
return;
|
|
wake_up(&p_ch->wait); /* wake up claw_release */
|
|
CLAW_DBF_TEXT(4, trace, "stop");
|
|
return;
|
|
case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
|
|
if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
|
|
(p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
|
|
(p_ch->irb->scsw.cmd.stctl ==
|
|
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
|
|
CLAW_DBF_TEXT(4, trace, "haltio");
|
|
return;
|
|
}
|
|
if (p_ch->flag == CLAW_READ) {
|
|
p_ch->claw_state = CLAW_START_READ;
|
|
wake_up(&p_ch->wait); /* wake claw_open (READ)*/
|
|
} else if (p_ch->flag == CLAW_WRITE) {
|
|
p_ch->claw_state = CLAW_START_WRITE;
|
|
/* send SYSTEM_VALIDATE */
|
|
claw_strt_read(dev, LOCK_NO);
|
|
claw_send_control(dev,
|
|
SYSTEM_VALIDATE_REQUEST,
|
|
0, 0, 0,
|
|
p_env->host_name,
|
|
p_env->adapter_name);
|
|
} else {
|
|
dev_warn(&cdev->dev, "The CLAW device received"
|
|
" an unexpected IRQ, "
|
|
"c-%02x d-%02x\n",
|
|
irb->scsw.cmd.cstat,
|
|
irb->scsw.cmd.dstat);
|
|
return;
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "haltio");
|
|
return;
|
|
case CLAW_START_READ:
|
|
CLAW_DBF_TEXT(4, trace, "ReadIRQ");
|
|
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
|
|
clear_bit(0, (void *)&p_ch->IO_active);
|
|
if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
|
|
(p_ch->irb->ecw[0] & 0x40) == 0x40 ||
|
|
(p_ch->irb->ecw[0]) == 0) {
|
|
privptr->stats.rx_errors++;
|
|
dev_info(&cdev->dev,
|
|
"%s: Restart is required after remote "
|
|
"side recovers \n",
|
|
dev->name);
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "notrdy");
|
|
return;
|
|
}
|
|
if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
|
|
(p_ch->irb->scsw.cmd.dstat == 0)) {
|
|
if (test_and_set_bit(CLAW_BH_ACTIVE,
|
|
(void *)&p_ch->flag_a) == 0)
|
|
tasklet_schedule(&p_ch->tasklet);
|
|
else
|
|
CLAW_DBF_TEXT(4, trace, "PCINoBH");
|
|
CLAW_DBF_TEXT(4, trace, "PCI_read");
|
|
return;
|
|
}
|
|
if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
|
|
(p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
|
|
(p_ch->irb->scsw.cmd.stctl ==
|
|
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
|
|
CLAW_DBF_TEXT(4, trace, "SPend_rd");
|
|
return;
|
|
}
|
|
clear_bit(0, (void *)&p_ch->IO_active);
|
|
claw_clearbit_busy(TB_RETRY, dev);
|
|
if (test_and_set_bit(CLAW_BH_ACTIVE,
|
|
(void *)&p_ch->flag_a) == 0)
|
|
tasklet_schedule(&p_ch->tasklet);
|
|
else
|
|
CLAW_DBF_TEXT(4, trace, "RdBHAct");
|
|
CLAW_DBF_TEXT(4, trace, "RdIRQXit");
|
|
return;
|
|
case CLAW_START_WRITE:
|
|
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
|
|
dev_info(&cdev->dev,
|
|
"%s: Unit Check Occured in "
|
|
"write channel\n", dev->name);
|
|
clear_bit(0, (void *)&p_ch->IO_active);
|
|
if (p_ch->irb->ecw[0] & 0x80) {
|
|
dev_info(&cdev->dev,
|
|
"%s: Resetting Event "
|
|
"occurred:\n", dev->name);
|
|
init_timer(&p_ch->timer);
|
|
p_ch->timer.function =
|
|
(void *)claw_write_retry;
|
|
p_ch->timer.data = (unsigned long)p_ch;
|
|
p_ch->timer.expires = jiffies + 10*HZ;
|
|
add_timer(&p_ch->timer);
|
|
dev_info(&cdev->dev,
|
|
"%s: write connection "
|
|
"restarting\n", dev->name);
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "rstrtwrt");
|
|
return;
|
|
}
|
|
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
|
|
clear_bit(0, (void *)&p_ch->IO_active);
|
|
dev_info(&cdev->dev,
|
|
"%s: Unit Exception "
|
|
"occurred in write channel\n",
|
|
dev->name);
|
|
}
|
|
if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
|
|
(p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
|
|
(p_ch->irb->scsw.cmd.stctl ==
|
|
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
|
|
CLAW_DBF_TEXT(4, trace, "writeUE");
|
|
return;
|
|
}
|
|
clear_bit(0, (void *)&p_ch->IO_active);
|
|
if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
|
|
claw_write_next(p_ch);
|
|
claw_clearbit_busy(TB_TX, dev);
|
|
claw_clear_busy(dev);
|
|
}
|
|
p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
|
|
if (test_and_set_bit(CLAW_BH_ACTIVE,
|
|
(void *)&p_ch_r->flag_a) == 0)
|
|
tasklet_schedule(&p_ch_r->tasklet);
|
|
CLAW_DBF_TEXT(4, trace, "StWtExit");
|
|
return;
|
|
default:
|
|
dev_warn(&cdev->dev,
|
|
"The CLAW device for %s received an unexpected IRQ\n",
|
|
dev->name);
|
|
CLAW_DBF_TEXT(2, trace, "badIRQ");
|
|
return;
|
|
}
|
|
|
|
} /* end of claw_irq_handler */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_irq_tasklet *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static void
|
|
claw_irq_tasklet ( unsigned long data )
|
|
{
|
|
struct chbk * p_ch;
|
|
struct net_device *dev;
|
|
struct claw_privbk * privptr;
|
|
|
|
p_ch = (struct chbk *) data;
|
|
dev = (struct net_device *)p_ch->ndev;
|
|
CLAW_DBF_TEXT(4, trace, "IRQtask");
|
|
privptr = (struct claw_privbk *)dev->ml_priv;
|
|
unpack_read(dev);
|
|
clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
|
|
CLAW_DBF_TEXT(4, trace, "TskletXt");
|
|
return;
|
|
} /* end of claw_irq_bh */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_release *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static int
|
|
claw_release(struct net_device *dev)
|
|
{
|
|
int rc;
|
|
int i;
|
|
unsigned long saveflags;
|
|
unsigned long parm;
|
|
struct claw_privbk *privptr;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct ccwbk* p_this_ccw;
|
|
struct ccwbk* p_buf;
|
|
|
|
if (!dev)
|
|
return 0;
|
|
privptr = (struct claw_privbk *)dev->ml_priv;
|
|
if (!privptr)
|
|
return 0;
|
|
CLAW_DBF_TEXT(4, trace, "release");
|
|
privptr->release_pend=1;
|
|
claw_setbit_busy(TB_STOP,dev);
|
|
for ( i = 1; i >=0 ; i--) {
|
|
spin_lock_irqsave(
|
|
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
|
|
/* del_timer(&privptr->channel[READ_CHANNEL].timer); */
|
|
privptr->channel[i].claw_state = CLAW_STOP;
|
|
privptr->channel[i].IO_active = 0;
|
|
parm = (unsigned long) &privptr->channel[i];
|
|
if (i == WRITE_CHANNEL)
|
|
claw_purge_skb_queue(
|
|
&privptr->channel[WRITE_CHANNEL].collect_queue);
|
|
rc = ccw_device_halt (privptr->channel[i].cdev, parm);
|
|
if (privptr->system_validate_comp==0x00) /* never opened? */
|
|
init_waitqueue_head(&privptr->channel[i].wait);
|
|
add_wait_queue(&privptr->channel[i].wait, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irqrestore(
|
|
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
|
|
schedule();
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&privptr->channel[i].wait, &wait);
|
|
if (rc != 0) {
|
|
ccw_check_return_code(privptr->channel[i].cdev, rc);
|
|
}
|
|
}
|
|
if (privptr->pk_skb != NULL) {
|
|
dev_kfree_skb_any(privptr->pk_skb);
|
|
privptr->pk_skb = NULL;
|
|
}
|
|
if(privptr->buffs_alloc != 1) {
|
|
CLAW_DBF_TEXT(4, trace, "none2fre");
|
|
return 0;
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "freebufs");
|
|
if (privptr->p_buff_ccw != NULL) {
|
|
free_pages((unsigned long)privptr->p_buff_ccw,
|
|
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "freeread");
|
|
if (privptr->p_env->read_size < PAGE_SIZE) {
|
|
if (privptr->p_buff_read != NULL) {
|
|
free_pages((unsigned long)privptr->p_buff_read,
|
|
(int)pages_to_order_of_mag(privptr->p_buff_read_num));
|
|
}
|
|
}
|
|
else {
|
|
p_buf=privptr->p_read_active_first;
|
|
while (p_buf!=NULL) {
|
|
free_pages((unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perread ));
|
|
p_buf=p_buf->next;
|
|
}
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "freewrit");
|
|
if (privptr->p_env->write_size < PAGE_SIZE ) {
|
|
free_pages((unsigned long)privptr->p_buff_write,
|
|
(int)pages_to_order_of_mag(privptr->p_buff_write_num));
|
|
}
|
|
else {
|
|
p_buf=privptr->p_write_active_first;
|
|
while (p_buf!=NULL) {
|
|
free_pages((unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perwrite ));
|
|
p_buf=p_buf->next;
|
|
}
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "clearptr");
|
|
privptr->buffs_alloc = 0;
|
|
privptr->p_buff_ccw=NULL;
|
|
privptr->p_buff_read=NULL;
|
|
privptr->p_buff_write=NULL;
|
|
privptr->system_validate_comp=0;
|
|
privptr->release_pend=0;
|
|
/* Remove any writes that were pending and reset all reads */
|
|
p_this_ccw=privptr->p_read_active_first;
|
|
while (p_this_ccw!=NULL) {
|
|
p_this_ccw->header.length=0xffff;
|
|
p_this_ccw->header.opcode=0xff;
|
|
p_this_ccw->header.flag=0x00;
|
|
p_this_ccw=p_this_ccw->next;
|
|
}
|
|
|
|
while (privptr->p_write_active_first!=NULL) {
|
|
p_this_ccw=privptr->p_write_active_first;
|
|
p_this_ccw->header.flag=CLAW_PENDING;
|
|
privptr->p_write_active_first=p_this_ccw->next;
|
|
p_this_ccw->next=privptr->p_write_free_chain;
|
|
privptr->p_write_free_chain=p_this_ccw;
|
|
++privptr->write_free_count;
|
|
}
|
|
privptr->p_write_active_last=NULL;
|
|
privptr->mtc_logical_link = -1;
|
|
privptr->mtc_skipping = 1;
|
|
privptr->mtc_offset=0;
|
|
|
|
if (((privptr->channel[READ_CHANNEL].last_dstat |
|
|
privptr->channel[WRITE_CHANNEL].last_dstat) &
|
|
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
|
|
dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
|
|
"Deactivating %s completed with incorrect"
|
|
" subchannel status "
|
|
"(read %02x, write %02x)\n",
|
|
dev->name,
|
|
privptr->channel[READ_CHANNEL].last_dstat,
|
|
privptr->channel[WRITE_CHANNEL].last_dstat);
|
|
CLAW_DBF_TEXT(2, trace, "badclose");
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "rlsexit");
|
|
return 0;
|
|
} /* end of claw_release */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_write_retry *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
claw_write_retry ( struct chbk *p_ch )
|
|
{
|
|
|
|
struct net_device *dev=p_ch->ndev;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "w_retry");
|
|
if (p_ch->claw_state == CLAW_STOP) {
|
|
return;
|
|
}
|
|
claw_strt_out_IO( dev );
|
|
CLAW_DBF_TEXT(4, trace, "rtry_xit");
|
|
return;
|
|
} /* end of claw_write_retry */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_write_next *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
claw_write_next ( struct chbk * p_ch )
|
|
{
|
|
|
|
struct net_device *dev;
|
|
struct claw_privbk *privptr=NULL;
|
|
struct sk_buff *pk_skb;
|
|
int rc;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "claw_wrt");
|
|
if (p_ch->claw_state == CLAW_STOP)
|
|
return;
|
|
dev = (struct net_device *) p_ch->ndev;
|
|
privptr = (struct claw_privbk *) dev->ml_priv;
|
|
claw_free_wrt_buf( dev );
|
|
if ((privptr->write_free_count > 0) &&
|
|
!skb_queue_empty(&p_ch->collect_queue)) {
|
|
pk_skb = claw_pack_skb(privptr);
|
|
while (pk_skb != NULL) {
|
|
rc = claw_hw_tx( pk_skb, dev,1);
|
|
if (privptr->write_free_count > 0) {
|
|
pk_skb = claw_pack_skb(privptr);
|
|
} else
|
|
pk_skb = NULL;
|
|
}
|
|
}
|
|
if (privptr->p_write_active_first!=NULL) {
|
|
claw_strt_out_IO(dev);
|
|
}
|
|
return;
|
|
} /* end of claw_write_next */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* claw_timer *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
claw_timer ( struct chbk * p_ch )
|
|
{
|
|
CLAW_DBF_TEXT(4, trace, "timer");
|
|
p_ch->flag |= CLAW_TIMER;
|
|
wake_up(&p_ch->wait);
|
|
return;
|
|
} /* end of claw_timer */
|
|
|
|
/*
|
|
*
|
|
* functions
|
|
*/
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* pages_to_order_of_mag *
|
|
* *
|
|
* takes a number of pages from 1 to 512 and returns the *
|
|
* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
|
|
* of magnitude get_free_pages() has an upper order of 9 *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
pages_to_order_of_mag(int num_of_pages)
|
|
{
|
|
int order_of_mag=1; /* assume 2 pages */
|
|
int nump;
|
|
|
|
CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
|
|
if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
|
|
/* 512 pages = 2Meg on 4k page systems */
|
|
if (num_of_pages >= 512) {return 9; }
|
|
/* we have two or more pages order is at least 1 */
|
|
for (nump=2 ;nump <= 512;nump*=2) {
|
|
if (num_of_pages <= nump)
|
|
break;
|
|
order_of_mag +=1;
|
|
}
|
|
if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
|
|
CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
|
|
return order_of_mag;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* add_claw_reads *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static int
|
|
add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
|
|
struct ccwbk* p_last)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
struct ccw1 temp_ccw;
|
|
struct endccw * p_end;
|
|
CLAW_DBF_TEXT(4, trace, "addreads");
|
|
privptr = dev->ml_priv;
|
|
p_end = privptr->p_end_ccw;
|
|
|
|
/* first CCW and last CCW contains a new set of read channel programs
|
|
* to apend the running channel programs
|
|
*/
|
|
if ( p_first==NULL) {
|
|
CLAW_DBF_TEXT(4, trace, "addexit");
|
|
return 0;
|
|
}
|
|
|
|
/* set up ending CCW sequence for this segment */
|
|
if (p_end->read1) {
|
|
p_end->read1=0x00; /* second ending CCW is now active */
|
|
/* reset ending CCWs and setup TIC CCWs */
|
|
p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
|
|
p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
|
|
p_end->read2_nop2.cda=0;
|
|
p_end->read2_nop2.count=1;
|
|
}
|
|
else {
|
|
p_end->read1=0x01; /* first ending CCW is now active */
|
|
/* reset ending CCWs and setup TIC CCWs */
|
|
p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
|
|
p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
|
|
p_end->read1_nop2.cda=0;
|
|
p_end->read1_nop2.count=1;
|
|
}
|
|
|
|
if ( privptr-> p_read_active_first ==NULL ) {
|
|
privptr->p_read_active_first = p_first; /* set new first */
|
|
privptr->p_read_active_last = p_last; /* set new last */
|
|
}
|
|
else {
|
|
|
|
/* set up TIC ccw */
|
|
temp_ccw.cda= (__u32)__pa(&p_first->read);
|
|
temp_ccw.count=0;
|
|
temp_ccw.flags=0;
|
|
temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
|
|
|
|
|
|
if (p_end->read1) {
|
|
|
|
/* first set of CCW's is chained to the new read */
|
|
/* chain, so the second set is chained to the active chain. */
|
|
/* Therefore modify the second set to point to the new */
|
|
/* read chain set up TIC CCWs */
|
|
/* make sure we update the CCW so channel doesn't fetch it */
|
|
/* when it's only half done */
|
|
memcpy( &p_end->read2_nop2, &temp_ccw ,
|
|
sizeof(struct ccw1));
|
|
privptr->p_read_active_last->r_TIC_1.cda=
|
|
(__u32)__pa(&p_first->read);
|
|
privptr->p_read_active_last->r_TIC_2.cda=
|
|
(__u32)__pa(&p_first->read);
|
|
}
|
|
else {
|
|
/* make sure we update the CCW so channel doesn't */
|
|
/* fetch it when it is only half done */
|
|
memcpy( &p_end->read1_nop2, &temp_ccw ,
|
|
sizeof(struct ccw1));
|
|
privptr->p_read_active_last->r_TIC_1.cda=
|
|
(__u32)__pa(&p_first->read);
|
|
privptr->p_read_active_last->r_TIC_2.cda=
|
|
(__u32)__pa(&p_first->read);
|
|
}
|
|
/* chain in new set of blocks */
|
|
privptr->p_read_active_last->next = p_first;
|
|
privptr->p_read_active_last=p_last;
|
|
} /* end of if ( privptr-> p_read_active_first ==NULL) */
|
|
CLAW_DBF_TEXT(4, trace, "addexit");
|
|
return 0;
|
|
} /* end of add_claw_reads */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* ccw_check_return_code *
|
|
* *
|
|
*-------------------------------------------------------------------*/
|
|
|
|
static void
|
|
ccw_check_return_code(struct ccw_device *cdev, int return_code)
|
|
{
|
|
CLAW_DBF_TEXT(4, trace, "ccwret");
|
|
if (return_code != 0) {
|
|
switch (return_code) {
|
|
case -EBUSY: /* BUSY is a transient state no action needed */
|
|
break;
|
|
case -ENODEV:
|
|
dev_err(&cdev->dev, "The remote channel adapter is not"
|
|
" available\n");
|
|
break;
|
|
case -EINVAL:
|
|
dev_err(&cdev->dev,
|
|
"The status of the remote channel adapter"
|
|
" is not valid\n");
|
|
break;
|
|
default:
|
|
dev_err(&cdev->dev, "The common device layer"
|
|
" returned error code %d\n",
|
|
return_code);
|
|
}
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "ccwret");
|
|
} /* end of ccw_check_return_code */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* ccw_check_unit_check *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
|
|
{
|
|
struct net_device *ndev = p_ch->ndev;
|
|
struct device *dev = &p_ch->cdev->dev;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "unitchek");
|
|
dev_warn(dev, "The communication peer of %s disconnected\n",
|
|
ndev->name);
|
|
|
|
if (sense & 0x40) {
|
|
if (sense & 0x01) {
|
|
dev_warn(dev, "The remote channel adapter for"
|
|
" %s has been reset\n",
|
|
ndev->name);
|
|
}
|
|
} else if (sense & 0x20) {
|
|
if (sense & 0x04) {
|
|
dev_warn(dev, "A data streaming timeout occurred"
|
|
" for %s\n",
|
|
ndev->name);
|
|
} else if (sense & 0x10) {
|
|
dev_warn(dev, "The remote channel adapter for %s"
|
|
" is faulty\n",
|
|
ndev->name);
|
|
} else {
|
|
dev_warn(dev, "A data transfer parity error occurred"
|
|
" for %s\n",
|
|
ndev->name);
|
|
}
|
|
} else if (sense & 0x10) {
|
|
dev_warn(dev, "A read data parity error occurred"
|
|
" for %s\n",
|
|
ndev->name);
|
|
}
|
|
|
|
} /* end of ccw_check_unit_check */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* find_link *
|
|
*--------------------------------------------------------------------*/
|
|
static int
|
|
find_link(struct net_device *dev, char *host_name, char *ws_name )
|
|
{
|
|
struct claw_privbk *privptr;
|
|
struct claw_env *p_env;
|
|
int rc=0;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "findlink");
|
|
privptr = dev->ml_priv;
|
|
p_env=privptr->p_env;
|
|
switch (p_env->packing)
|
|
{
|
|
case PACKING_ASK:
|
|
if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
|
|
(memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
|
|
rc = EINVAL;
|
|
break;
|
|
case DO_PACKED:
|
|
case PACK_SEND:
|
|
if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
|
|
(memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
|
|
rc = EINVAL;
|
|
break;
|
|
default:
|
|
if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
|
|
(memcmp(p_env->api_type , ws_name, 8)!=0))
|
|
rc = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
} /* end of find_link */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_hw_tx *
|
|
* *
|
|
* *
|
|
*-------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
|
|
{
|
|
int rc=0;
|
|
struct claw_privbk *privptr;
|
|
struct ccwbk *p_this_ccw;
|
|
struct ccwbk *p_first_ccw;
|
|
struct ccwbk *p_last_ccw;
|
|
__u32 numBuffers;
|
|
signed long len_of_data;
|
|
unsigned long bytesInThisBuffer;
|
|
unsigned char *pDataAddress;
|
|
struct endccw *pEnd;
|
|
struct ccw1 tempCCW;
|
|
struct chbk *p_ch;
|
|
struct claw_env *p_env;
|
|
int lock;
|
|
struct clawph *pk_head;
|
|
struct chbk *ch;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "hw_tx");
|
|
privptr = (struct claw_privbk *)(dev->ml_priv);
|
|
p_ch = (struct chbk *)&privptr->channel[WRITE_CHANNEL];
|
|
p_env =privptr->p_env;
|
|
claw_free_wrt_buf(dev); /* Clean up free chain if posible */
|
|
/* scan the write queue to free any completed write packets */
|
|
p_first_ccw=NULL;
|
|
p_last_ccw=NULL;
|
|
if ((p_env->packing >= PACK_SEND) &&
|
|
(skb->cb[1] != 'P')) {
|
|
skb_push(skb,sizeof(struct clawph));
|
|
pk_head=(struct clawph *)skb->data;
|
|
pk_head->len=skb->len-sizeof(struct clawph);
|
|
if (pk_head->len%4) {
|
|
pk_head->len+= 4-(pk_head->len%4);
|
|
skb_pad(skb,4-(pk_head->len%4));
|
|
skb_put(skb,4-(pk_head->len%4));
|
|
}
|
|
if (p_env->packing == DO_PACKED)
|
|
pk_head->link_num = linkid;
|
|
else
|
|
pk_head->link_num = 0;
|
|
pk_head->flag = 0x00;
|
|
skb_pad(skb,4);
|
|
skb->cb[1] = 'P';
|
|
}
|
|
if (linkid == 0) {
|
|
if (claw_check_busy(dev)) {
|
|
if (privptr->write_free_count!=0) {
|
|
claw_clear_busy(dev);
|
|
}
|
|
else {
|
|
claw_strt_out_IO(dev );
|
|
claw_free_wrt_buf( dev );
|
|
if (privptr->write_free_count==0) {
|
|
ch = &privptr->channel[WRITE_CHANNEL];
|
|
atomic_inc(&skb->users);
|
|
skb_queue_tail(&ch->collect_queue, skb);
|
|
goto Done;
|
|
}
|
|
else {
|
|
claw_clear_busy(dev);
|
|
}
|
|
}
|
|
}
|
|
/* tx lock */
|
|
if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
|
|
ch = &privptr->channel[WRITE_CHANNEL];
|
|
atomic_inc(&skb->users);
|
|
skb_queue_tail(&ch->collect_queue, skb);
|
|
claw_strt_out_IO(dev );
|
|
rc=-EBUSY;
|
|
goto Done2;
|
|
}
|
|
}
|
|
/* See how many write buffers are required to hold this data */
|
|
numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
|
|
|
|
/* If that number of buffers isn't available, give up for now */
|
|
if (privptr->write_free_count < numBuffers ||
|
|
privptr->p_write_free_chain == NULL ) {
|
|
|
|
claw_setbit_busy(TB_NOBUFFER,dev);
|
|
ch = &privptr->channel[WRITE_CHANNEL];
|
|
atomic_inc(&skb->users);
|
|
skb_queue_tail(&ch->collect_queue, skb);
|
|
CLAW_DBF_TEXT(2, trace, "clawbusy");
|
|
goto Done2;
|
|
}
|
|
pDataAddress=skb->data;
|
|
len_of_data=skb->len;
|
|
|
|
while (len_of_data > 0) {
|
|
p_this_ccw=privptr->p_write_free_chain; /* get a block */
|
|
if (p_this_ccw == NULL) { /* lost the race */
|
|
ch = &privptr->channel[WRITE_CHANNEL];
|
|
atomic_inc(&skb->users);
|
|
skb_queue_tail(&ch->collect_queue, skb);
|
|
goto Done2;
|
|
}
|
|
privptr->p_write_free_chain=p_this_ccw->next;
|
|
p_this_ccw->next=NULL;
|
|
--privptr->write_free_count; /* -1 */
|
|
if (len_of_data >= privptr->p_env->write_size)
|
|
bytesInThisBuffer = privptr->p_env->write_size;
|
|
else
|
|
bytesInThisBuffer = len_of_data;
|
|
memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
|
|
len_of_data-=bytesInThisBuffer;
|
|
pDataAddress+=(unsigned long)bytesInThisBuffer;
|
|
/* setup write CCW */
|
|
p_this_ccw->write.cmd_code = (linkid * 8) +1;
|
|
if (len_of_data>0) {
|
|
p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
|
|
}
|
|
p_this_ccw->write.count=bytesInThisBuffer;
|
|
/* now add to end of this chain */
|
|
if (p_first_ccw==NULL) {
|
|
p_first_ccw=p_this_ccw;
|
|
}
|
|
if (p_last_ccw!=NULL) {
|
|
p_last_ccw->next=p_this_ccw;
|
|
/* set up TIC ccws */
|
|
p_last_ccw->w_TIC_1.cda=
|
|
(__u32)__pa(&p_this_ccw->write);
|
|
}
|
|
p_last_ccw=p_this_ccw; /* save new last block */
|
|
}
|
|
|
|
/* FirstCCW and LastCCW now contain a new set of write channel
|
|
* programs to append to the running channel program
|
|
*/
|
|
|
|
if (p_first_ccw!=NULL) {
|
|
/* setup ending ccw sequence for this segment */
|
|
pEnd=privptr->p_end_ccw;
|
|
if (pEnd->write1) {
|
|
pEnd->write1=0x00; /* second end ccw is now active */
|
|
/* set up Tic CCWs */
|
|
p_last_ccw->w_TIC_1.cda=
|
|
(__u32)__pa(&pEnd->write2_nop1);
|
|
pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
pEnd->write2_nop2.flags =
|
|
CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
pEnd->write2_nop2.cda=0;
|
|
pEnd->write2_nop2.count=1;
|
|
}
|
|
else { /* end of if (pEnd->write1)*/
|
|
pEnd->write1=0x01; /* first end ccw is now active */
|
|
/* set up Tic CCWs */
|
|
p_last_ccw->w_TIC_1.cda=
|
|
(__u32)__pa(&pEnd->write1_nop1);
|
|
pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
pEnd->write1_nop2.flags =
|
|
CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
pEnd->write1_nop2.cda=0;
|
|
pEnd->write1_nop2.count=1;
|
|
} /* end if if (pEnd->write1) */
|
|
|
|
if (privptr->p_write_active_first==NULL ) {
|
|
privptr->p_write_active_first=p_first_ccw;
|
|
privptr->p_write_active_last=p_last_ccw;
|
|
}
|
|
else {
|
|
/* set up Tic CCWs */
|
|
|
|
tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
|
|
tempCCW.count=0;
|
|
tempCCW.flags=0;
|
|
tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
|
|
|
|
if (pEnd->write1) {
|
|
|
|
/*
|
|
* first set of ending CCW's is chained to the new write
|
|
* chain, so the second set is chained to the active chain
|
|
* Therefore modify the second set to point the new write chain.
|
|
* make sure we update the CCW atomically
|
|
* so channel does not fetch it when it's only half done
|
|
*/
|
|
memcpy( &pEnd->write2_nop2, &tempCCW ,
|
|
sizeof(struct ccw1));
|
|
privptr->p_write_active_last->w_TIC_1.cda=
|
|
(__u32)__pa(&p_first_ccw->write);
|
|
}
|
|
else {
|
|
|
|
/*make sure we update the CCW atomically
|
|
*so channel does not fetch it when it's only half done
|
|
*/
|
|
memcpy(&pEnd->write1_nop2, &tempCCW ,
|
|
sizeof(struct ccw1));
|
|
privptr->p_write_active_last->w_TIC_1.cda=
|
|
(__u32)__pa(&p_first_ccw->write);
|
|
|
|
} /* end if if (pEnd->write1) */
|
|
|
|
privptr->p_write_active_last->next=p_first_ccw;
|
|
privptr->p_write_active_last=p_last_ccw;
|
|
}
|
|
|
|
} /* endif (p_first_ccw!=NULL) */
|
|
dev_kfree_skb_any(skb);
|
|
if (linkid==0) {
|
|
lock=LOCK_NO;
|
|
}
|
|
else {
|
|
lock=LOCK_YES;
|
|
}
|
|
claw_strt_out_IO(dev );
|
|
/* if write free count is zero , set NOBUFFER */
|
|
if (privptr->write_free_count==0) {
|
|
claw_setbit_busy(TB_NOBUFFER,dev);
|
|
}
|
|
Done2:
|
|
claw_clearbit_busy(TB_TX,dev);
|
|
Done:
|
|
return(rc);
|
|
} /* end of claw_hw_tx */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* init_ccw_bk *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
init_ccw_bk(struct net_device *dev)
|
|
{
|
|
|
|
__u32 ccw_blocks_required;
|
|
__u32 ccw_blocks_perpage;
|
|
__u32 ccw_pages_required;
|
|
__u32 claw_reads_perpage=1;
|
|
__u32 claw_read_pages;
|
|
__u32 claw_writes_perpage=1;
|
|
__u32 claw_write_pages;
|
|
void *p_buff=NULL;
|
|
struct ccwbk*p_free_chain;
|
|
struct ccwbk*p_buf;
|
|
struct ccwbk*p_last_CCWB;
|
|
struct ccwbk*p_first_CCWB;
|
|
struct endccw *p_endccw=NULL;
|
|
addr_t real_address;
|
|
struct claw_privbk *privptr = dev->ml_priv;
|
|
struct clawh *pClawH=NULL;
|
|
addr_t real_TIC_address;
|
|
int i,j;
|
|
CLAW_DBF_TEXT(4, trace, "init_ccw");
|
|
|
|
/* initialize statistics field */
|
|
privptr->active_link_ID=0;
|
|
/* initialize ccwbk pointers */
|
|
privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
|
|
privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
|
|
privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
|
|
privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
|
|
privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
|
|
privptr->p_end_ccw=NULL; /* pointer to ending ccw */
|
|
privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
|
|
privptr->buffs_alloc = 0;
|
|
memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
|
|
memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
|
|
/* initialize free write ccwbk counter */
|
|
privptr->write_free_count=0; /* number of free bufs on write chain */
|
|
p_last_CCWB = NULL;
|
|
p_first_CCWB= NULL;
|
|
/*
|
|
* We need 1 CCW block for each read buffer, 1 for each
|
|
* write buffer, plus 1 for ClawSignalBlock
|
|
*/
|
|
ccw_blocks_required =
|
|
privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
|
|
/*
|
|
* compute number of CCW blocks that will fit in a page
|
|
*/
|
|
ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
|
|
ccw_pages_required=
|
|
DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
|
|
|
|
/*
|
|
* read and write sizes are set by 2 constants in claw.h
|
|
* 4k and 32k. Unpacked values other than 4k are not going to
|
|
* provide good performance. With packing buffers support 32k
|
|
* buffers are used.
|
|
*/
|
|
if (privptr->p_env->read_size < PAGE_SIZE) {
|
|
claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
|
|
claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
|
|
claw_reads_perpage);
|
|
}
|
|
else { /* > or equal */
|
|
privptr->p_buff_pages_perread =
|
|
DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
|
|
claw_read_pages = privptr->p_env->read_buffers *
|
|
privptr->p_buff_pages_perread;
|
|
}
|
|
if (privptr->p_env->write_size < PAGE_SIZE) {
|
|
claw_writes_perpage =
|
|
PAGE_SIZE / privptr->p_env->write_size;
|
|
claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
|
|
claw_writes_perpage);
|
|
|
|
}
|
|
else { /* > or equal */
|
|
privptr->p_buff_pages_perwrite =
|
|
DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
|
|
claw_write_pages = privptr->p_env->write_buffers *
|
|
privptr->p_buff_pages_perwrite;
|
|
}
|
|
/*
|
|
* allocate ccw_pages_required
|
|
*/
|
|
if (privptr->p_buff_ccw==NULL) {
|
|
privptr->p_buff_ccw=
|
|
(void *)__get_free_pages(__GFP_DMA,
|
|
(int)pages_to_order_of_mag(ccw_pages_required ));
|
|
if (privptr->p_buff_ccw==NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
privptr->p_buff_ccw_num=ccw_pages_required;
|
|
}
|
|
memset(privptr->p_buff_ccw, 0x00,
|
|
privptr->p_buff_ccw_num * PAGE_SIZE);
|
|
|
|
/*
|
|
* obtain ending ccw block address
|
|
*
|
|
*/
|
|
privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
|
|
real_address = (__u32)__pa(privptr->p_end_ccw);
|
|
/* Initialize ending CCW block */
|
|
p_endccw=privptr->p_end_ccw;
|
|
p_endccw->real=real_address;
|
|
p_endccw->write1=0x00;
|
|
p_endccw->read1=0x00;
|
|
|
|
/* write1_nop1 */
|
|
p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
|
|
p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_endccw->write1_nop1.count = 1;
|
|
p_endccw->write1_nop1.cda = 0;
|
|
|
|
/* write1_nop2 */
|
|
p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_endccw->write1_nop2.count = 1;
|
|
p_endccw->write1_nop2.cda = 0;
|
|
|
|
/* write2_nop1 */
|
|
p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
|
|
p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_endccw->write2_nop1.count = 1;
|
|
p_endccw->write2_nop1.cda = 0;
|
|
|
|
/* write2_nop2 */
|
|
p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_endccw->write2_nop2.count = 1;
|
|
p_endccw->write2_nop2.cda = 0;
|
|
|
|
/* read1_nop1 */
|
|
p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
|
|
p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_endccw->read1_nop1.count = 1;
|
|
p_endccw->read1_nop1.cda = 0;
|
|
|
|
/* read1_nop2 */
|
|
p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_endccw->read1_nop2.count = 1;
|
|
p_endccw->read1_nop2.cda = 0;
|
|
|
|
/* read2_nop1 */
|
|
p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
|
|
p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_endccw->read2_nop1.count = 1;
|
|
p_endccw->read2_nop1.cda = 0;
|
|
|
|
/* read2_nop2 */
|
|
p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
|
|
p_endccw->read2_nop2.count = 1;
|
|
p_endccw->read2_nop2.cda = 0;
|
|
|
|
/*
|
|
* Build a chain of CCWs
|
|
*
|
|
*/
|
|
p_buff=privptr->p_buff_ccw;
|
|
|
|
p_free_chain=NULL;
|
|
for (i=0 ; i < ccw_pages_required; i++ ) {
|
|
real_address = (__u32)__pa(p_buff);
|
|
p_buf=p_buff;
|
|
for (j=0 ; j < ccw_blocks_perpage ; j++) {
|
|
p_buf->next = p_free_chain;
|
|
p_free_chain = p_buf;
|
|
p_buf->real=(__u32)__pa(p_buf);
|
|
++p_buf;
|
|
}
|
|
p_buff+=PAGE_SIZE;
|
|
}
|
|
/*
|
|
* Initialize ClawSignalBlock
|
|
*
|
|
*/
|
|
if (privptr->p_claw_signal_blk==NULL) {
|
|
privptr->p_claw_signal_blk=p_free_chain;
|
|
p_free_chain=p_free_chain->next;
|
|
pClawH=(struct clawh *)privptr->p_claw_signal_blk;
|
|
pClawH->length=0xffff;
|
|
pClawH->opcode=0xff;
|
|
pClawH->flag=CLAW_BUSY;
|
|
}
|
|
|
|
/*
|
|
* allocate write_pages_required and add to free chain
|
|
*/
|
|
if (privptr->p_buff_write==NULL) {
|
|
if (privptr->p_env->write_size < PAGE_SIZE) {
|
|
privptr->p_buff_write=
|
|
(void *)__get_free_pages(__GFP_DMA,
|
|
(int)pages_to_order_of_mag(claw_write_pages ));
|
|
if (privptr->p_buff_write==NULL) {
|
|
privptr->p_buff_ccw=NULL;
|
|
return -ENOMEM;
|
|
}
|
|
/*
|
|
* Build CLAW write free chain
|
|
*
|
|
*/
|
|
|
|
memset(privptr->p_buff_write, 0x00,
|
|
ccw_pages_required * PAGE_SIZE);
|
|
privptr->p_write_free_chain=NULL;
|
|
|
|
p_buff=privptr->p_buff_write;
|
|
|
|
for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
|
|
p_buf = p_free_chain; /* get a CCW */
|
|
p_free_chain = p_buf->next;
|
|
p_buf->next =privptr->p_write_free_chain;
|
|
privptr->p_write_free_chain = p_buf;
|
|
p_buf-> p_buffer = (struct clawbuf *)p_buff;
|
|
p_buf-> write.cda = (__u32)__pa(p_buff);
|
|
p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> w_read_FF.count = 1;
|
|
p_buf-> w_read_FF.cda =
|
|
(__u32)__pa(&p_buf-> header.flag);
|
|
p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
|
|
p_buf-> w_TIC_1.flags = 0;
|
|
p_buf-> w_TIC_1.count = 0;
|
|
|
|
if (((unsigned long)p_buff +
|
|
privptr->p_env->write_size) >=
|
|
((unsigned long)(p_buff+2*
|
|
(privptr->p_env->write_size) - 1) & PAGE_MASK)) {
|
|
p_buff = p_buff+privptr->p_env->write_size;
|
|
}
|
|
}
|
|
}
|
|
else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
|
|
{
|
|
privptr->p_write_free_chain=NULL;
|
|
for (i = 0; i< privptr->p_env->write_buffers ; i++) {
|
|
p_buff=(void *)__get_free_pages(__GFP_DMA,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perwrite) );
|
|
if (p_buff==NULL) {
|
|
free_pages((unsigned long)privptr->p_buff_ccw,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_ccw_num));
|
|
privptr->p_buff_ccw=NULL;
|
|
p_buf=privptr->p_buff_write;
|
|
while (p_buf!=NULL) {
|
|
free_pages((unsigned long)
|
|
p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perwrite));
|
|
p_buf=p_buf->next;
|
|
}
|
|
return -ENOMEM;
|
|
} /* Error on get_pages */
|
|
memset(p_buff, 0x00, privptr->p_env->write_size );
|
|
p_buf = p_free_chain;
|
|
p_free_chain = p_buf->next;
|
|
p_buf->next = privptr->p_write_free_chain;
|
|
privptr->p_write_free_chain = p_buf;
|
|
privptr->p_buff_write = p_buf;
|
|
p_buf->p_buffer=(struct clawbuf *)p_buff;
|
|
p_buf-> write.cda = (__u32)__pa(p_buff);
|
|
p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> w_read_FF.count = 1;
|
|
p_buf-> w_read_FF.cda =
|
|
(__u32)__pa(&p_buf-> header.flag);
|
|
p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
|
|
p_buf-> w_TIC_1.flags = 0;
|
|
p_buf-> w_TIC_1.count = 0;
|
|
} /* for all write_buffers */
|
|
|
|
} /* else buffers are PAGE_SIZE or bigger */
|
|
|
|
}
|
|
privptr->p_buff_write_num=claw_write_pages;
|
|
privptr->write_free_count=privptr->p_env->write_buffers;
|
|
|
|
|
|
/*
|
|
* allocate read_pages_required and chain to free chain
|
|
*/
|
|
if (privptr->p_buff_read==NULL) {
|
|
if (privptr->p_env->read_size < PAGE_SIZE) {
|
|
privptr->p_buff_read=
|
|
(void *)__get_free_pages(__GFP_DMA,
|
|
(int)pages_to_order_of_mag(claw_read_pages) );
|
|
if (privptr->p_buff_read==NULL) {
|
|
free_pages((unsigned long)privptr->p_buff_ccw,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_ccw_num));
|
|
/* free the write pages size is < page size */
|
|
free_pages((unsigned long)privptr->p_buff_write,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_write_num));
|
|
privptr->p_buff_ccw=NULL;
|
|
privptr->p_buff_write=NULL;
|
|
return -ENOMEM;
|
|
}
|
|
memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
|
|
privptr->p_buff_read_num=claw_read_pages;
|
|
/*
|
|
* Build CLAW read free chain
|
|
*
|
|
*/
|
|
p_buff=privptr->p_buff_read;
|
|
for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
|
|
p_buf = p_free_chain;
|
|
p_free_chain = p_buf->next;
|
|
|
|
if (p_last_CCWB==NULL) {
|
|
p_buf->next=NULL;
|
|
real_TIC_address=0;
|
|
p_last_CCWB=p_buf;
|
|
}
|
|
else {
|
|
p_buf->next=p_first_CCWB;
|
|
real_TIC_address=
|
|
(__u32)__pa(&p_first_CCWB -> read );
|
|
}
|
|
|
|
p_first_CCWB=p_buf;
|
|
|
|
p_buf->p_buffer=(struct clawbuf *)p_buff;
|
|
/* initialize read command */
|
|
p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
|
|
p_buf-> read.cda = (__u32)__pa(p_buff);
|
|
p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> read.count = privptr->p_env->read_size;
|
|
|
|
/* initialize read_h command */
|
|
p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
|
|
p_buf-> read_h.cda =
|
|
(__u32)__pa(&(p_buf->header));
|
|
p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> read_h.count = sizeof(struct clawh);
|
|
|
|
/* initialize Signal command */
|
|
p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
|
|
p_buf-> signal.cda =
|
|
(__u32)__pa(&(pClawH->flag));
|
|
p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> signal.count = 1;
|
|
|
|
/* initialize r_TIC_1 command */
|
|
p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
|
|
p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
|
|
p_buf-> r_TIC_1.flags = 0;
|
|
p_buf-> r_TIC_1.count = 0;
|
|
|
|
/* initialize r_read_FF command */
|
|
p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_buf-> r_read_FF.cda =
|
|
(__u32)__pa(&(pClawH->flag));
|
|
p_buf-> r_read_FF.flags =
|
|
CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
|
|
p_buf-> r_read_FF.count = 1;
|
|
|
|
/* initialize r_TIC_2 */
|
|
memcpy(&p_buf->r_TIC_2,
|
|
&p_buf->r_TIC_1, sizeof(struct ccw1));
|
|
|
|
/* initialize Header */
|
|
p_buf->header.length=0xffff;
|
|
p_buf->header.opcode=0xff;
|
|
p_buf->header.flag=CLAW_PENDING;
|
|
|
|
if (((unsigned long)p_buff+privptr->p_env->read_size) >=
|
|
((unsigned long)(p_buff+2*(privptr->p_env->read_size)
|
|
-1)
|
|
& PAGE_MASK)) {
|
|
p_buff= p_buff+privptr->p_env->read_size;
|
|
}
|
|
else {
|
|
p_buff=
|
|
(void *)((unsigned long)
|
|
(p_buff+2*(privptr->p_env->read_size)-1)
|
|
& PAGE_MASK) ;
|
|
}
|
|
} /* for read_buffers */
|
|
} /* read_size < PAGE_SIZE */
|
|
else { /* read Size >= PAGE_SIZE */
|
|
for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
|
|
p_buff = (void *)__get_free_pages(__GFP_DMA,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perread));
|
|
if (p_buff==NULL) {
|
|
free_pages((unsigned long)privptr->p_buff_ccw,
|
|
(int)pages_to_order_of_mag(privptr->
|
|
p_buff_ccw_num));
|
|
/* free the write pages */
|
|
p_buf=privptr->p_buff_write;
|
|
while (p_buf!=NULL) {
|
|
free_pages(
|
|
(unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perwrite));
|
|
p_buf=p_buf->next;
|
|
}
|
|
/* free any read pages already alloc */
|
|
p_buf=privptr->p_buff_read;
|
|
while (p_buf!=NULL) {
|
|
free_pages(
|
|
(unsigned long)p_buf->p_buffer,
|
|
(int)pages_to_order_of_mag(
|
|
privptr->p_buff_pages_perread));
|
|
p_buf=p_buf->next;
|
|
}
|
|
privptr->p_buff_ccw=NULL;
|
|
privptr->p_buff_write=NULL;
|
|
return -ENOMEM;
|
|
}
|
|
memset(p_buff, 0x00, privptr->p_env->read_size);
|
|
p_buf = p_free_chain;
|
|
privptr->p_buff_read = p_buf;
|
|
p_free_chain = p_buf->next;
|
|
|
|
if (p_last_CCWB==NULL) {
|
|
p_buf->next=NULL;
|
|
real_TIC_address=0;
|
|
p_last_CCWB=p_buf;
|
|
}
|
|
else {
|
|
p_buf->next=p_first_CCWB;
|
|
real_TIC_address=
|
|
(addr_t)__pa(
|
|
&p_first_CCWB -> read );
|
|
}
|
|
|
|
p_first_CCWB=p_buf;
|
|
/* save buff address */
|
|
p_buf->p_buffer=(struct clawbuf *)p_buff;
|
|
/* initialize read command */
|
|
p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
|
|
p_buf-> read.cda = (__u32)__pa(p_buff);
|
|
p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> read.count = privptr->p_env->read_size;
|
|
|
|
/* initialize read_h command */
|
|
p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
|
|
p_buf-> read_h.cda =
|
|
(__u32)__pa(&(p_buf->header));
|
|
p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> read_h.count = sizeof(struct clawh);
|
|
|
|
/* initialize Signal command */
|
|
p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
|
|
p_buf-> signal.cda =
|
|
(__u32)__pa(&(pClawH->flag));
|
|
p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
p_buf-> signal.count = 1;
|
|
|
|
/* initialize r_TIC_1 command */
|
|
p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
|
|
p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
|
|
p_buf-> r_TIC_1.flags = 0;
|
|
p_buf-> r_TIC_1.count = 0;
|
|
|
|
/* initialize r_read_FF command */
|
|
p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
|
|
p_buf-> r_read_FF.cda =
|
|
(__u32)__pa(&(pClawH->flag));
|
|
p_buf-> r_read_FF.flags =
|
|
CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
|
|
p_buf-> r_read_FF.count = 1;
|
|
|
|
/* initialize r_TIC_2 */
|
|
memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
|
|
sizeof(struct ccw1));
|
|
|
|
/* initialize Header */
|
|
p_buf->header.length=0xffff;
|
|
p_buf->header.opcode=0xff;
|
|
p_buf->header.flag=CLAW_PENDING;
|
|
|
|
} /* For read_buffers */
|
|
} /* read_size >= PAGE_SIZE */
|
|
} /* pBuffread = NULL */
|
|
add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
|
|
privptr->buffs_alloc = 1;
|
|
|
|
return 0;
|
|
} /* end of init_ccw_bk */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* *
|
|
* probe_error *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
probe_error( struct ccwgroup_device *cgdev)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "proberr");
|
|
privptr = dev_get_drvdata(&cgdev->dev);
|
|
if (privptr != NULL) {
|
|
dev_set_drvdata(&cgdev->dev, NULL);
|
|
kfree(privptr->p_env);
|
|
kfree(privptr->p_mtc_envelope);
|
|
kfree(privptr);
|
|
}
|
|
} /* probe_error */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_process_control *
|
|
* *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
|
|
{
|
|
|
|
struct clawbuf *p_buf;
|
|
struct clawctl ctlbk;
|
|
struct clawctl *p_ctlbk;
|
|
char temp_host_name[8];
|
|
char temp_ws_name[8];
|
|
struct claw_privbk *privptr;
|
|
struct claw_env *p_env;
|
|
struct sysval *p_sysval;
|
|
struct conncmd *p_connect=NULL;
|
|
int rc;
|
|
struct chbk *p_ch = NULL;
|
|
struct device *tdev;
|
|
CLAW_DBF_TEXT(2, setup, "clw_cntl");
|
|
udelay(1000); /* Wait a ms for the control packets to
|
|
*catch up to each other */
|
|
privptr = dev->ml_priv;
|
|
p_env=privptr->p_env;
|
|
tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
|
|
memcpy( &temp_host_name, p_env->host_name, 8);
|
|
memcpy( &temp_ws_name, p_env->adapter_name , 8);
|
|
dev_info(tdev, "%s: CLAW device %.8s: "
|
|
"Received Control Packet\n",
|
|
dev->name, temp_ws_name);
|
|
if (privptr->release_pend==1) {
|
|
return 0;
|
|
}
|
|
p_buf=p_ccw->p_buffer;
|
|
p_ctlbk=&ctlbk;
|
|
if (p_env->packing == DO_PACKED) { /* packing in progress?*/
|
|
memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
|
|
} else {
|
|
memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
|
|
}
|
|
switch (p_ctlbk->command)
|
|
{
|
|
case SYSTEM_VALIDATE_REQUEST:
|
|
if (p_ctlbk->version != CLAW_VERSION_ID) {
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk,
|
|
CLAW_RC_WRONG_VERSION);
|
|
dev_warn(tdev, "The communication peer of %s"
|
|
" uses an incorrect API version %d\n",
|
|
dev->name, p_ctlbk->version);
|
|
}
|
|
p_sysval = (struct sysval *)&(p_ctlbk->data);
|
|
dev_info(tdev, "%s: Recv Sys Validate Request: "
|
|
"Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
|
|
"Host name=%.8s\n",
|
|
dev->name, p_ctlbk->version,
|
|
p_ctlbk->linkid,
|
|
p_ctlbk->correlator,
|
|
p_sysval->WS_name,
|
|
p_sysval->host_name);
|
|
if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk,
|
|
CLAW_RC_NAME_MISMATCH);
|
|
CLAW_DBF_TEXT(2, setup, "HSTBAD");
|
|
CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
|
|
CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
|
|
dev_warn(tdev,
|
|
"Host name %s for %s does not match the"
|
|
" remote adapter name %s\n",
|
|
p_sysval->host_name,
|
|
dev->name,
|
|
temp_host_name);
|
|
}
|
|
if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk,
|
|
CLAW_RC_NAME_MISMATCH);
|
|
CLAW_DBF_TEXT(2, setup, "WSNBAD");
|
|
CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
|
|
CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
|
|
dev_warn(tdev, "Adapter name %s for %s does not match"
|
|
" the remote host name %s\n",
|
|
p_sysval->WS_name,
|
|
dev->name,
|
|
temp_ws_name);
|
|
}
|
|
if ((p_sysval->write_frame_size < p_env->write_size) &&
|
|
(p_env->packing == 0)) {
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk,
|
|
CLAW_RC_HOST_RCV_TOO_SMALL);
|
|
dev_warn(tdev,
|
|
"The local write buffer is smaller than the"
|
|
" remote read buffer\n");
|
|
CLAW_DBF_TEXT(2, setup, "wrtszbad");
|
|
}
|
|
if ((p_sysval->read_frame_size < p_env->read_size) &&
|
|
(p_env->packing == 0)) {
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk,
|
|
CLAW_RC_HOST_RCV_TOO_SMALL);
|
|
dev_warn(tdev,
|
|
"The local read buffer is smaller than the"
|
|
" remote write buffer\n");
|
|
CLAW_DBF_TEXT(2, setup, "rdsizbad");
|
|
}
|
|
claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
|
|
dev_info(tdev,
|
|
"CLAW device %.8s: System validate"
|
|
" completed.\n", temp_ws_name);
|
|
dev_info(tdev,
|
|
"%s: sys Validate Rsize:%d Wsize:%d\n",
|
|
dev->name, p_sysval->read_frame_size,
|
|
p_sysval->write_frame_size);
|
|
privptr->system_validate_comp = 1;
|
|
if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
|
|
p_env->packing = PACKING_ASK;
|
|
claw_strt_conn_req(dev);
|
|
break;
|
|
case SYSTEM_VALIDATE_RESPONSE:
|
|
p_sysval = (struct sysval *)&(p_ctlbk->data);
|
|
dev_info(tdev,
|
|
"Settings for %s validated (version=%d, "
|
|
"remote device=%d, rc=%d, adapter name=%.8s, "
|
|
"host name=%.8s)\n",
|
|
dev->name,
|
|
p_ctlbk->version,
|
|
p_ctlbk->correlator,
|
|
p_ctlbk->rc,
|
|
p_sysval->WS_name,
|
|
p_sysval->host_name);
|
|
switch (p_ctlbk->rc) {
|
|
case 0:
|
|
dev_info(tdev, "%s: CLAW device "
|
|
"%.8s: System validate completed.\n",
|
|
dev->name, temp_ws_name);
|
|
if (privptr->system_validate_comp == 0)
|
|
claw_strt_conn_req(dev);
|
|
privptr->system_validate_comp = 1;
|
|
break;
|
|
case CLAW_RC_NAME_MISMATCH:
|
|
dev_warn(tdev, "Validating %s failed because of"
|
|
" a host or adapter name mismatch\n",
|
|
dev->name);
|
|
break;
|
|
case CLAW_RC_WRONG_VERSION:
|
|
dev_warn(tdev, "Validating %s failed because of a"
|
|
" version conflict\n",
|
|
dev->name);
|
|
break;
|
|
case CLAW_RC_HOST_RCV_TOO_SMALL:
|
|
dev_warn(tdev, "Validating %s failed because of a"
|
|
" frame size conflict\n",
|
|
dev->name);
|
|
break;
|
|
default:
|
|
dev_warn(tdev, "The communication peer of %s rejected"
|
|
" the connection\n",
|
|
dev->name);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case CONNECTION_REQUEST:
|
|
p_connect = (struct conncmd *)&(p_ctlbk->data);
|
|
dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
|
|
"Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
|
|
dev->name,
|
|
p_ctlbk->version,
|
|
p_ctlbk->linkid,
|
|
p_ctlbk->correlator,
|
|
p_connect->host_name,
|
|
p_connect->WS_name);
|
|
if (privptr->active_link_ID != 0) {
|
|
claw_snd_disc(dev, p_ctlbk);
|
|
dev_info(tdev, "%s rejected a connection request"
|
|
" because it is already active\n",
|
|
dev->name);
|
|
}
|
|
if (p_ctlbk->linkid != 1) {
|
|
claw_snd_disc(dev, p_ctlbk);
|
|
dev_info(tdev, "%s rejected a request to open multiple"
|
|
" connections\n",
|
|
dev->name);
|
|
}
|
|
rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
|
|
if (rc != 0) {
|
|
claw_snd_disc(dev, p_ctlbk);
|
|
dev_info(tdev, "%s rejected a connection request"
|
|
" because of a type mismatch\n",
|
|
dev->name);
|
|
}
|
|
claw_send_control(dev,
|
|
CONNECTION_CONFIRM, p_ctlbk->linkid,
|
|
p_ctlbk->correlator,
|
|
0, p_connect->host_name,
|
|
p_connect->WS_name);
|
|
if (p_env->packing == PACKING_ASK) {
|
|
p_env->packing = PACK_SEND;
|
|
claw_snd_conn_req(dev, 0);
|
|
}
|
|
dev_info(tdev, "%s: CLAW device %.8s: Connection "
|
|
"completed link_id=%d.\n",
|
|
dev->name, temp_ws_name,
|
|
p_ctlbk->linkid);
|
|
privptr->active_link_ID = p_ctlbk->linkid;
|
|
p_ch = &privptr->channel[WRITE_CHANNEL];
|
|
wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
|
|
break;
|
|
case CONNECTION_RESPONSE:
|
|
p_connect = (struct conncmd *)&(p_ctlbk->data);
|
|
dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
|
|
"Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
|
|
dev->name,
|
|
p_ctlbk->version,
|
|
p_ctlbk->linkid,
|
|
p_ctlbk->correlator,
|
|
p_ctlbk->rc,
|
|
p_connect->host_name,
|
|
p_connect->WS_name);
|
|
|
|
if (p_ctlbk->rc != 0) {
|
|
dev_warn(tdev, "The communication peer of %s rejected"
|
|
" a connection request\n",
|
|
dev->name);
|
|
return 1;
|
|
}
|
|
rc = find_link(dev,
|
|
p_connect->host_name, p_connect->WS_name);
|
|
if (rc != 0) {
|
|
claw_snd_disc(dev, p_ctlbk);
|
|
dev_warn(tdev, "The communication peer of %s"
|
|
" rejected a connection "
|
|
"request because of a type mismatch\n",
|
|
dev->name);
|
|
}
|
|
/* should be until CONNECTION_CONFIRM */
|
|
privptr->active_link_ID = -(p_ctlbk->linkid);
|
|
break;
|
|
case CONNECTION_CONFIRM:
|
|
p_connect = (struct conncmd *)&(p_ctlbk->data);
|
|
dev_info(tdev,
|
|
"%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
|
|
"Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
|
|
dev->name,
|
|
p_ctlbk->version,
|
|
p_ctlbk->linkid,
|
|
p_ctlbk->correlator,
|
|
p_connect->host_name,
|
|
p_connect->WS_name);
|
|
if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
|
|
privptr->active_link_ID = p_ctlbk->linkid;
|
|
if (p_env->packing > PACKING_ASK) {
|
|
dev_info(tdev,
|
|
"%s: Confirmed Now packing\n", dev->name);
|
|
p_env->packing = DO_PACKED;
|
|
}
|
|
p_ch = &privptr->channel[WRITE_CHANNEL];
|
|
wake_up(&p_ch->wait);
|
|
} else {
|
|
dev_warn(tdev, "Activating %s failed because of"
|
|
" an incorrect link ID=%d\n",
|
|
dev->name, p_ctlbk->linkid);
|
|
claw_snd_disc(dev, p_ctlbk);
|
|
}
|
|
break;
|
|
case DISCONNECT:
|
|
dev_info(tdev, "%s: Disconnect: "
|
|
"Vers=%d,link_id=%d,Corr=%d\n",
|
|
dev->name, p_ctlbk->version,
|
|
p_ctlbk->linkid, p_ctlbk->correlator);
|
|
if ((p_ctlbk->linkid == 2) &&
|
|
(p_env->packing == PACK_SEND)) {
|
|
privptr->active_link_ID = 1;
|
|
p_env->packing = DO_PACKED;
|
|
} else
|
|
privptr->active_link_ID = 0;
|
|
break;
|
|
case CLAW_ERROR:
|
|
dev_warn(tdev, "The communication peer of %s failed\n",
|
|
dev->name);
|
|
break;
|
|
default:
|
|
dev_warn(tdev, "The communication peer of %s sent"
|
|
" an unknown command code\n",
|
|
dev->name);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
} /* end of claw_process_control */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_send_control *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_send_control(struct net_device *dev, __u8 type, __u8 link,
|
|
__u8 correlator, __u8 rc, char *local_name, char *remote_name)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
struct clawctl *p_ctl;
|
|
struct sysval *p_sysval;
|
|
struct conncmd *p_connect;
|
|
struct sk_buff *skb;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "sndcntl");
|
|
privptr = dev->ml_priv;
|
|
p_ctl=(struct clawctl *)&privptr->ctl_bk;
|
|
|
|
p_ctl->command=type;
|
|
p_ctl->version=CLAW_VERSION_ID;
|
|
p_ctl->linkid=link;
|
|
p_ctl->correlator=correlator;
|
|
p_ctl->rc=rc;
|
|
|
|
p_sysval=(struct sysval *)&p_ctl->data;
|
|
p_connect=(struct conncmd *)&p_ctl->data;
|
|
|
|
switch (p_ctl->command) {
|
|
case SYSTEM_VALIDATE_REQUEST:
|
|
case SYSTEM_VALIDATE_RESPONSE:
|
|
memcpy(&p_sysval->host_name, local_name, 8);
|
|
memcpy(&p_sysval->WS_name, remote_name, 8);
|
|
if (privptr->p_env->packing > 0) {
|
|
p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
|
|
p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
|
|
} else {
|
|
/* how big is the biggest group of packets */
|
|
p_sysval->read_frame_size =
|
|
privptr->p_env->read_size;
|
|
p_sysval->write_frame_size =
|
|
privptr->p_env->write_size;
|
|
}
|
|
memset(&p_sysval->reserved, 0x00, 4);
|
|
break;
|
|
case CONNECTION_REQUEST:
|
|
case CONNECTION_RESPONSE:
|
|
case CONNECTION_CONFIRM:
|
|
case DISCONNECT:
|
|
memcpy(&p_sysval->host_name, local_name, 8);
|
|
memcpy(&p_sysval->WS_name, remote_name, 8);
|
|
if (privptr->p_env->packing > 0) {
|
|
/* How big is the biggest packet */
|
|
p_connect->reserved1[0]=CLAW_FRAME_SIZE;
|
|
p_connect->reserved1[1]=CLAW_FRAME_SIZE;
|
|
} else {
|
|
memset(&p_connect->reserved1, 0x00, 4);
|
|
memset(&p_connect->reserved2, 0x00, 4);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* write Control Record to the device */
|
|
|
|
|
|
skb = dev_alloc_skb(sizeof(struct clawctl));
|
|
if (!skb) {
|
|
return -ENOMEM;
|
|
}
|
|
memcpy(skb_put(skb, sizeof(struct clawctl)),
|
|
p_ctl, sizeof(struct clawctl));
|
|
if (privptr->p_env->packing >= PACK_SEND)
|
|
claw_hw_tx(skb, dev, 1);
|
|
else
|
|
claw_hw_tx(skb, dev, 0);
|
|
return 0;
|
|
} /* end of claw_send_control */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_snd_conn_req *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static int
|
|
claw_snd_conn_req(struct net_device *dev, __u8 link)
|
|
{
|
|
int rc;
|
|
struct claw_privbk *privptr = dev->ml_priv;
|
|
struct clawctl *p_ctl;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "snd_conn");
|
|
rc = 1;
|
|
p_ctl=(struct clawctl *)&privptr->ctl_bk;
|
|
p_ctl->linkid = link;
|
|
if ( privptr->system_validate_comp==0x00 ) {
|
|
return rc;
|
|
}
|
|
if (privptr->p_env->packing == PACKING_ASK )
|
|
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
|
|
WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
|
|
if (privptr->p_env->packing == PACK_SEND) {
|
|
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
|
|
WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
|
|
}
|
|
if (privptr->p_env->packing == 0)
|
|
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
|
|
HOST_APPL_NAME, privptr->p_env->api_type);
|
|
return rc;
|
|
|
|
} /* end of claw_snd_conn_req */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_snd_disc *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
|
|
{
|
|
int rc;
|
|
struct conncmd * p_connect;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "snd_dsc");
|
|
p_connect=(struct conncmd *)&p_ctl->data;
|
|
|
|
rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
|
|
p_ctl->correlator, 0,
|
|
p_connect->host_name, p_connect->WS_name);
|
|
return rc;
|
|
} /* end of claw_snd_disc */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_snd_sys_validate_rsp *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_snd_sys_validate_rsp(struct net_device *dev,
|
|
struct clawctl *p_ctl, __u32 return_code)
|
|
{
|
|
struct claw_env * p_env;
|
|
struct claw_privbk *privptr;
|
|
int rc;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "chkresp");
|
|
privptr = dev->ml_priv;
|
|
p_env=privptr->p_env;
|
|
rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
|
|
p_ctl->linkid,
|
|
p_ctl->correlator,
|
|
return_code,
|
|
p_env->host_name,
|
|
p_env->adapter_name );
|
|
return rc;
|
|
} /* end of claw_snd_sys_validate_rsp */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_strt_conn_req *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static int
|
|
claw_strt_conn_req(struct net_device *dev )
|
|
{
|
|
int rc;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "conn_req");
|
|
rc=claw_snd_conn_req(dev, 1);
|
|
return rc;
|
|
} /* end of claw_strt_conn_req */
|
|
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_stats *
|
|
*-------------------------------------------------------------------*/
|
|
|
|
static struct
|
|
net_device_stats *claw_stats(struct net_device *dev)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "stats");
|
|
privptr = dev->ml_priv;
|
|
return &privptr->stats;
|
|
} /* end of claw_stats */
|
|
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* unpack_read *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static void
|
|
unpack_read(struct net_device *dev )
|
|
{
|
|
struct sk_buff *skb;
|
|
struct claw_privbk *privptr;
|
|
struct claw_env *p_env;
|
|
struct ccwbk *p_this_ccw;
|
|
struct ccwbk *p_first_ccw;
|
|
struct ccwbk *p_last_ccw;
|
|
struct clawph *p_packh;
|
|
void *p_packd;
|
|
struct clawctl *p_ctlrec=NULL;
|
|
struct device *p_dev;
|
|
|
|
__u32 len_of_data;
|
|
__u32 pack_off;
|
|
__u8 link_num;
|
|
__u8 mtc_this_frm=0;
|
|
__u32 bytes_to_mov;
|
|
int i=0;
|
|
int p=0;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "unpkread");
|
|
p_first_ccw=NULL;
|
|
p_last_ccw=NULL;
|
|
p_packh=NULL;
|
|
p_packd=NULL;
|
|
privptr = dev->ml_priv;
|
|
|
|
p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
|
|
p_env = privptr->p_env;
|
|
p_this_ccw=privptr->p_read_active_first;
|
|
while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
|
|
pack_off = 0;
|
|
p = 0;
|
|
p_this_ccw->header.flag=CLAW_PENDING;
|
|
privptr->p_read_active_first=p_this_ccw->next;
|
|
p_this_ccw->next=NULL;
|
|
p_packh = (struct clawph *)p_this_ccw->p_buffer;
|
|
if ((p_env->packing == PACK_SEND) &&
|
|
(p_packh->len == 32) &&
|
|
(p_packh->link_num == 0)) { /* is it a packed ctl rec? */
|
|
p_packh++; /* peek past pack header */
|
|
p_ctlrec = (struct clawctl *)p_packh;
|
|
p_packh--; /* un peek */
|
|
if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
|
|
(p_ctlrec->command == CONNECTION_CONFIRM))
|
|
p_env->packing = DO_PACKED;
|
|
}
|
|
if (p_env->packing == DO_PACKED)
|
|
link_num=p_packh->link_num;
|
|
else
|
|
link_num=p_this_ccw->header.opcode / 8;
|
|
if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
|
|
mtc_this_frm=1;
|
|
if (p_this_ccw->header.length!=
|
|
privptr->p_env->read_size ) {
|
|
dev_warn(p_dev,
|
|
"The communication peer of %s"
|
|
" sent a faulty"
|
|
" frame of length %02x\n",
|
|
dev->name, p_this_ccw->header.length);
|
|
}
|
|
}
|
|
|
|
if (privptr->mtc_skipping) {
|
|
/*
|
|
* We're in the mode of skipping past a
|
|
* multi-frame message
|
|
* that we can't process for some reason or other.
|
|
* The first frame without the More-To-Come flag is
|
|
* the last frame of the skipped message.
|
|
*/
|
|
/* in case of More-To-Come not set in this frame */
|
|
if (mtc_this_frm==0) {
|
|
privptr->mtc_skipping=0; /* Ok, the end */
|
|
privptr->mtc_logical_link=-1;
|
|
}
|
|
goto NextFrame;
|
|
}
|
|
|
|
if (link_num==0) {
|
|
claw_process_control(dev, p_this_ccw);
|
|
CLAW_DBF_TEXT(4, trace, "UnpkCntl");
|
|
goto NextFrame;
|
|
}
|
|
unpack_next:
|
|
if (p_env->packing == DO_PACKED) {
|
|
if (pack_off > p_env->read_size)
|
|
goto NextFrame;
|
|
p_packd = p_this_ccw->p_buffer+pack_off;
|
|
p_packh = (struct clawph *) p_packd;
|
|
if ((p_packh->len == 0) || /* done with this frame? */
|
|
(p_packh->flag != 0))
|
|
goto NextFrame;
|
|
bytes_to_mov = p_packh->len;
|
|
pack_off += bytes_to_mov+sizeof(struct clawph);
|
|
p++;
|
|
} else {
|
|
bytes_to_mov=p_this_ccw->header.length;
|
|
}
|
|
if (privptr->mtc_logical_link<0) {
|
|
|
|
/*
|
|
* if More-To-Come is set in this frame then we don't know
|
|
* length of entire message, and hence have to allocate
|
|
* large buffer */
|
|
|
|
/* We are starting a new envelope */
|
|
privptr->mtc_offset=0;
|
|
privptr->mtc_logical_link=link_num;
|
|
}
|
|
|
|
if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
|
|
/* error */
|
|
privptr->stats.rx_frame_errors++;
|
|
goto NextFrame;
|
|
}
|
|
if (p_env->packing == DO_PACKED) {
|
|
memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
|
|
p_packd+sizeof(struct clawph), bytes_to_mov);
|
|
|
|
} else {
|
|
memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
|
|
p_this_ccw->p_buffer, bytes_to_mov);
|
|
}
|
|
if (mtc_this_frm==0) {
|
|
len_of_data=privptr->mtc_offset+bytes_to_mov;
|
|
skb=dev_alloc_skb(len_of_data);
|
|
if (skb) {
|
|
memcpy(skb_put(skb,len_of_data),
|
|
privptr->p_mtc_envelope,
|
|
len_of_data);
|
|
skb->dev=dev;
|
|
skb_reset_mac_header(skb);
|
|
skb->protocol=htons(ETH_P_IP);
|
|
skb->ip_summed=CHECKSUM_UNNECESSARY;
|
|
privptr->stats.rx_packets++;
|
|
privptr->stats.rx_bytes+=len_of_data;
|
|
netif_rx(skb);
|
|
}
|
|
else {
|
|
dev_info(p_dev, "Allocating a buffer for"
|
|
" incoming data failed\n");
|
|
privptr->stats.rx_dropped++;
|
|
}
|
|
privptr->mtc_offset=0;
|
|
privptr->mtc_logical_link=-1;
|
|
}
|
|
else {
|
|
privptr->mtc_offset+=bytes_to_mov;
|
|
}
|
|
if (p_env->packing == DO_PACKED)
|
|
goto unpack_next;
|
|
NextFrame:
|
|
/*
|
|
* Remove ThisCCWblock from active read queue, and add it
|
|
* to queue of free blocks to be reused.
|
|
*/
|
|
i++;
|
|
p_this_ccw->header.length=0xffff;
|
|
p_this_ccw->header.opcode=0xff;
|
|
/*
|
|
* add this one to the free queue for later reuse
|
|
*/
|
|
if (p_first_ccw==NULL) {
|
|
p_first_ccw = p_this_ccw;
|
|
}
|
|
else {
|
|
p_last_ccw->next = p_this_ccw;
|
|
}
|
|
p_last_ccw = p_this_ccw;
|
|
/*
|
|
* chain to next block on active read queue
|
|
*/
|
|
p_this_ccw = privptr->p_read_active_first;
|
|
CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
|
|
} /* end of while */
|
|
|
|
/* check validity */
|
|
|
|
CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
|
|
add_claw_reads(dev, p_first_ccw, p_last_ccw);
|
|
claw_strt_read(dev, LOCK_YES);
|
|
return;
|
|
} /* end of unpack_read */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_strt_read *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static void
|
|
claw_strt_read (struct net_device *dev, int lock )
|
|
{
|
|
int rc = 0;
|
|
__u32 parm;
|
|
unsigned long saveflags = 0;
|
|
struct claw_privbk *privptr = dev->ml_priv;
|
|
struct ccwbk*p_ccwbk;
|
|
struct chbk *p_ch;
|
|
struct clawh *p_clawh;
|
|
p_ch = &privptr->channel[READ_CHANNEL];
|
|
|
|
CLAW_DBF_TEXT(4, trace, "StRdNter");
|
|
p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
|
|
p_clawh->flag=CLAW_IDLE; /* 0x00 */
|
|
|
|
if ((privptr->p_write_active_first!=NULL &&
|
|
privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
|
|
(privptr->p_read_active_first!=NULL &&
|
|
privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
|
|
p_clawh->flag=CLAW_BUSY; /* 0xff */
|
|
}
|
|
if (lock==LOCK_YES) {
|
|
spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
|
|
}
|
|
if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
|
|
CLAW_DBF_TEXT(4, trace, "HotRead");
|
|
p_ccwbk=privptr->p_read_active_first;
|
|
parm = (unsigned long) p_ch;
|
|
rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
|
|
0xff, 0);
|
|
if (rc != 0) {
|
|
ccw_check_return_code(p_ch->cdev, rc);
|
|
}
|
|
}
|
|
else {
|
|
CLAW_DBF_TEXT(2, trace, "ReadAct");
|
|
}
|
|
|
|
if (lock==LOCK_YES) {
|
|
spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
|
|
}
|
|
CLAW_DBF_TEXT(4, trace, "StRdExit");
|
|
return;
|
|
} /* end of claw_strt_read */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw_strt_out_IO *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
claw_strt_out_IO( struct net_device *dev )
|
|
{
|
|
int rc = 0;
|
|
unsigned long parm;
|
|
struct claw_privbk *privptr;
|
|
struct chbk *p_ch;
|
|
struct ccwbk *p_first_ccw;
|
|
|
|
if (!dev) {
|
|
return;
|
|
}
|
|
privptr = (struct claw_privbk *)dev->ml_priv;
|
|
p_ch = &privptr->channel[WRITE_CHANNEL];
|
|
|
|
CLAW_DBF_TEXT(4, trace, "strt_io");
|
|
p_first_ccw=privptr->p_write_active_first;
|
|
|
|
if (p_ch->claw_state == CLAW_STOP)
|
|
return;
|
|
if (p_first_ccw == NULL) {
|
|
return;
|
|
}
|
|
if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
|
|
parm = (unsigned long) p_ch;
|
|
CLAW_DBF_TEXT(2, trace, "StWrtIO");
|
|
rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
|
|
0xff, 0);
|
|
if (rc != 0) {
|
|
ccw_check_return_code(p_ch->cdev, rc);
|
|
}
|
|
}
|
|
dev->trans_start = jiffies;
|
|
return;
|
|
} /* end of claw_strt_out_IO */
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* Free write buffers *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
|
|
static void
|
|
claw_free_wrt_buf( struct net_device *dev )
|
|
{
|
|
|
|
struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
|
|
struct ccwbk*p_first_ccw;
|
|
struct ccwbk*p_last_ccw;
|
|
struct ccwbk*p_this_ccw;
|
|
struct ccwbk*p_next_ccw;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "freewrtb");
|
|
/* scan the write queue to free any completed write packets */
|
|
p_first_ccw=NULL;
|
|
p_last_ccw=NULL;
|
|
p_this_ccw=privptr->p_write_active_first;
|
|
while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
|
|
{
|
|
p_next_ccw = p_this_ccw->next;
|
|
if (((p_next_ccw!=NULL) &&
|
|
(p_next_ccw->header.flag!=CLAW_PENDING)) ||
|
|
((p_this_ccw == privptr->p_write_active_last) &&
|
|
(p_this_ccw->header.flag!=CLAW_PENDING))) {
|
|
/* The next CCW is OK or this is */
|
|
/* the last CCW...free it @A1A */
|
|
privptr->p_write_active_first=p_this_ccw->next;
|
|
p_this_ccw->header.flag=CLAW_PENDING;
|
|
p_this_ccw->next=privptr->p_write_free_chain;
|
|
privptr->p_write_free_chain=p_this_ccw;
|
|
++privptr->write_free_count;
|
|
privptr->stats.tx_bytes+= p_this_ccw->write.count;
|
|
p_this_ccw=privptr->p_write_active_first;
|
|
privptr->stats.tx_packets++;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
if (privptr->write_free_count!=0) {
|
|
claw_clearbit_busy(TB_NOBUFFER,dev);
|
|
}
|
|
/* whole chain removed? */
|
|
if (privptr->p_write_active_first==NULL) {
|
|
privptr->p_write_active_last=NULL;
|
|
}
|
|
CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
|
|
return;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------*
|
|
* claw free netdevice *
|
|
* *
|
|
*--------------------------------------------------------------------*/
|
|
static void
|
|
claw_free_netdevice(struct net_device * dev, int free_dev)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
|
|
CLAW_DBF_TEXT(2, setup, "free_dev");
|
|
if (!dev)
|
|
return;
|
|
CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
|
|
privptr = dev->ml_priv;
|
|
if (dev->flags & IFF_RUNNING)
|
|
claw_release(dev);
|
|
if (privptr) {
|
|
privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
|
|
}
|
|
dev->ml_priv = NULL;
|
|
#ifdef MODULE
|
|
if (free_dev) {
|
|
free_netdev(dev);
|
|
}
|
|
#endif
|
|
CLAW_DBF_TEXT(2, setup, "free_ok");
|
|
}
|
|
|
|
/**
|
|
* Claw init netdevice
|
|
* Initialize everything of the net device except the name and the
|
|
* channel structs.
|
|
*/
|
|
static const struct net_device_ops claw_netdev_ops = {
|
|
.ndo_open = claw_open,
|
|
.ndo_stop = claw_release,
|
|
.ndo_get_stats = claw_stats,
|
|
.ndo_start_xmit = claw_tx,
|
|
.ndo_change_mtu = claw_change_mtu,
|
|
};
|
|
|
|
static void
|
|
claw_init_netdevice(struct net_device * dev)
|
|
{
|
|
CLAW_DBF_TEXT(2, setup, "init_dev");
|
|
CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
|
|
dev->mtu = CLAW_DEFAULT_MTU_SIZE;
|
|
dev->hard_header_len = 0;
|
|
dev->addr_len = 0;
|
|
dev->type = ARPHRD_SLIP;
|
|
dev->tx_queue_len = 1300;
|
|
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
|
|
dev->netdev_ops = &claw_netdev_ops;
|
|
CLAW_DBF_TEXT(2, setup, "initok");
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Init a new channel in the privptr->channel[i].
|
|
*
|
|
* @param cdev The ccw_device to be added.
|
|
*
|
|
* @return 0 on success, !0 on error.
|
|
*/
|
|
static int
|
|
add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
|
|
{
|
|
struct chbk *p_ch;
|
|
struct ccw_dev_id dev_id;
|
|
|
|
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
|
|
privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
|
|
p_ch = &privptr->channel[i];
|
|
p_ch->cdev = cdev;
|
|
snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
|
|
ccw_device_get_id(cdev, &dev_id);
|
|
p_ch->devno = dev_id.devno;
|
|
if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* Setup an interface.
|
|
*
|
|
* @param cgdev Device to be setup.
|
|
*
|
|
* @returns 0 on success, !0 on failure.
|
|
*/
|
|
static int
|
|
claw_new_device(struct ccwgroup_device *cgdev)
|
|
{
|
|
struct claw_privbk *privptr;
|
|
struct claw_env *p_env;
|
|
struct net_device *dev;
|
|
int ret;
|
|
struct ccw_dev_id dev_id;
|
|
|
|
dev_info(&cgdev->dev, "add for %s\n",
|
|
dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
|
|
CLAW_DBF_TEXT(2, setup, "new_dev");
|
|
privptr = dev_get_drvdata(&cgdev->dev);
|
|
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
|
|
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
|
|
if (!privptr)
|
|
return -ENODEV;
|
|
p_env = privptr->p_env;
|
|
ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
|
|
p_env->devno[READ_CHANNEL] = dev_id.devno;
|
|
ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
|
|
p_env->devno[WRITE_CHANNEL] = dev_id.devno;
|
|
ret = add_channel(cgdev->cdev[0],0,privptr);
|
|
if (ret == 0)
|
|
ret = add_channel(cgdev->cdev[1],1,privptr);
|
|
if (ret != 0) {
|
|
dev_warn(&cgdev->dev, "Creating a CLAW group device"
|
|
" failed with error code %d\n", ret);
|
|
goto out;
|
|
}
|
|
ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
|
|
if (ret != 0) {
|
|
dev_warn(&cgdev->dev,
|
|
"Setting the read subchannel online"
|
|
" failed with error code %d\n", ret);
|
|
goto out;
|
|
}
|
|
ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
|
|
if (ret != 0) {
|
|
dev_warn(&cgdev->dev,
|
|
"Setting the write subchannel online "
|
|
"failed with error code %d\n", ret);
|
|
goto out;
|
|
}
|
|
dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
|
|
if (!dev) {
|
|
dev_warn(&cgdev->dev,
|
|
"Activating the CLAW device failed\n");
|
|
goto out;
|
|
}
|
|
dev->ml_priv = privptr;
|
|
dev_set_drvdata(&cgdev->dev, privptr);
|
|
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
|
|
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
|
|
/* sysfs magic */
|
|
SET_NETDEV_DEV(dev, &cgdev->dev);
|
|
if (register_netdev(dev) != 0) {
|
|
claw_free_netdevice(dev, 1);
|
|
CLAW_DBF_TEXT(2, trace, "regfail");
|
|
goto out;
|
|
}
|
|
dev->flags &=~IFF_RUNNING;
|
|
if (privptr->buffs_alloc == 0) {
|
|
ret=init_ccw_bk(dev);
|
|
if (ret !=0) {
|
|
unregister_netdev(dev);
|
|
claw_free_netdevice(dev,1);
|
|
CLAW_DBF_TEXT(2, trace, "ccwmem");
|
|
goto out;
|
|
}
|
|
}
|
|
privptr->channel[READ_CHANNEL].ndev = dev;
|
|
privptr->channel[WRITE_CHANNEL].ndev = dev;
|
|
privptr->p_env->ndev = dev;
|
|
|
|
dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
|
|
"readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
|
|
dev->name, p_env->read_size,
|
|
p_env->write_size, p_env->read_buffers,
|
|
p_env->write_buffers, p_env->devno[READ_CHANNEL],
|
|
p_env->devno[WRITE_CHANNEL]);
|
|
dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
|
|
":%.8s api_type: %.8s\n",
|
|
dev->name, p_env->host_name,
|
|
p_env->adapter_name , p_env->api_type);
|
|
return 0;
|
|
out:
|
|
ccw_device_set_offline(cgdev->cdev[1]);
|
|
ccw_device_set_offline(cgdev->cdev[0]);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void
|
|
claw_purge_skb_queue(struct sk_buff_head *q)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
CLAW_DBF_TEXT(4, trace, "purgque");
|
|
while ((skb = skb_dequeue(q))) {
|
|
atomic_dec(&skb->users);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Shutdown an interface.
|
|
*
|
|
* @param cgdev Device to be shut down.
|
|
*
|
|
* @returns 0 on success, !0 on failure.
|
|
*/
|
|
static int
|
|
claw_shutdown_device(struct ccwgroup_device *cgdev)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct net_device *ndev;
|
|
int ret;
|
|
|
|
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
|
|
priv = dev_get_drvdata(&cgdev->dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
ndev = priv->channel[READ_CHANNEL].ndev;
|
|
if (ndev) {
|
|
/* Close the device */
|
|
dev_info(&cgdev->dev, "%s: shutting down\n",
|
|
ndev->name);
|
|
if (ndev->flags & IFF_RUNNING)
|
|
ret = claw_release(ndev);
|
|
ndev->flags &=~IFF_RUNNING;
|
|
unregister_netdev(ndev);
|
|
ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
|
|
claw_free_netdevice(ndev, 1);
|
|
priv->channel[READ_CHANNEL].ndev = NULL;
|
|
priv->channel[WRITE_CHANNEL].ndev = NULL;
|
|
priv->p_env->ndev = NULL;
|
|
}
|
|
ccw_device_set_offline(cgdev->cdev[1]);
|
|
ccw_device_set_offline(cgdev->cdev[0]);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
claw_remove_device(struct ccwgroup_device *cgdev)
|
|
{
|
|
struct claw_privbk *priv;
|
|
|
|
BUG_ON(!cgdev);
|
|
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
|
|
priv = dev_get_drvdata(&cgdev->dev);
|
|
BUG_ON(!priv);
|
|
dev_info(&cgdev->dev, " will be removed.\n");
|
|
if (cgdev->state == CCWGROUP_ONLINE)
|
|
claw_shutdown_device(cgdev);
|
|
claw_remove_files(&cgdev->dev);
|
|
kfree(priv->p_mtc_envelope);
|
|
priv->p_mtc_envelope=NULL;
|
|
kfree(priv->p_env);
|
|
priv->p_env=NULL;
|
|
kfree(priv->channel[0].irb);
|
|
priv->channel[0].irb=NULL;
|
|
kfree(priv->channel[1].irb);
|
|
priv->channel[1].irb=NULL;
|
|
kfree(priv);
|
|
dev_set_drvdata(&cgdev->dev, NULL);
|
|
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
|
|
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
|
|
put_device(&cgdev->dev);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* sysfs attributes
|
|
*/
|
|
static ssize_t
|
|
claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
return sprintf(buf, "%s\n",p_env->host_name);
|
|
}
|
|
|
|
static ssize_t
|
|
claw_hname_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
if (count > MAX_NAME_LEN+1)
|
|
return -EINVAL;
|
|
memset(p_env->host_name, 0x20, MAX_NAME_LEN);
|
|
strncpy(p_env->host_name,buf, count);
|
|
p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
|
|
p_env->host_name[MAX_NAME_LEN] = 0x00;
|
|
CLAW_DBF_TEXT(2, setup, "HstnSet");
|
|
CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
|
|
|
|
static ssize_t
|
|
claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
return sprintf(buf, "%s\n", p_env->adapter_name);
|
|
}
|
|
|
|
static ssize_t
|
|
claw_adname_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
if (count > MAX_NAME_LEN+1)
|
|
return -EINVAL;
|
|
memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
|
|
strncpy(p_env->adapter_name,buf, count);
|
|
p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
|
|
p_env->adapter_name[MAX_NAME_LEN] = 0x00;
|
|
CLAW_DBF_TEXT(2, setup, "AdnSet");
|
|
CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
|
|
|
|
static ssize_t
|
|
claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
return sprintf(buf, "%s\n",
|
|
p_env->api_type);
|
|
}
|
|
|
|
static ssize_t
|
|
claw_apname_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
if (count > MAX_NAME_LEN+1)
|
|
return -EINVAL;
|
|
memset(p_env->api_type, 0x20, MAX_NAME_LEN);
|
|
strncpy(p_env->api_type,buf, count);
|
|
p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
|
|
p_env->api_type[MAX_NAME_LEN] = 0x00;
|
|
if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
|
|
p_env->read_size=DEF_PACK_BUFSIZE;
|
|
p_env->write_size=DEF_PACK_BUFSIZE;
|
|
p_env->packing=PACKING_ASK;
|
|
CLAW_DBF_TEXT(2, setup, "PACKING");
|
|
}
|
|
else {
|
|
p_env->packing=0;
|
|
p_env->read_size=CLAW_FRAME_SIZE;
|
|
p_env->write_size=CLAW_FRAME_SIZE;
|
|
CLAW_DBF_TEXT(2, setup, "ApiSet");
|
|
}
|
|
CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
|
|
|
|
static ssize_t
|
|
claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
return sprintf(buf, "%d\n", p_env->write_buffers);
|
|
}
|
|
|
|
static ssize_t
|
|
claw_wbuff_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
int nnn,max;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
sscanf(buf, "%i", &nnn);
|
|
if (p_env->packing) {
|
|
max = 64;
|
|
}
|
|
else {
|
|
max = 512;
|
|
}
|
|
if ((nnn > max ) || (nnn < 2))
|
|
return -EINVAL;
|
|
p_env->write_buffers = nnn;
|
|
CLAW_DBF_TEXT(2, setup, "Wbufset");
|
|
CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
|
|
|
|
static ssize_t
|
|
claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env * p_env;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
return sprintf(buf, "%d\n", p_env->read_buffers);
|
|
}
|
|
|
|
static ssize_t
|
|
claw_rbuff_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct claw_privbk *priv;
|
|
struct claw_env *p_env;
|
|
int nnn,max;
|
|
|
|
priv = dev_get_drvdata(dev);
|
|
if (!priv)
|
|
return -ENODEV;
|
|
p_env = priv->p_env;
|
|
sscanf(buf, "%i", &nnn);
|
|
if (p_env->packing) {
|
|
max = 64;
|
|
}
|
|
else {
|
|
max = 512;
|
|
}
|
|
if ((nnn > max ) || (nnn < 2))
|
|
return -EINVAL;
|
|
p_env->read_buffers = nnn;
|
|
CLAW_DBF_TEXT(2, setup, "Rbufset");
|
|
CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
|
|
|
|
static struct attribute *claw_attr[] = {
|
|
&dev_attr_read_buffer.attr,
|
|
&dev_attr_write_buffer.attr,
|
|
&dev_attr_adapter_name.attr,
|
|
&dev_attr_api_type.attr,
|
|
&dev_attr_host_name.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group claw_attr_group = {
|
|
.attrs = claw_attr,
|
|
};
|
|
|
|
static int
|
|
claw_add_files(struct device *dev)
|
|
{
|
|
CLAW_DBF_TEXT(2, setup, "add_file");
|
|
return sysfs_create_group(&dev->kobj, &claw_attr_group);
|
|
}
|
|
|
|
static void
|
|
claw_remove_files(struct device *dev)
|
|
{
|
|
CLAW_DBF_TEXT(2, setup, "rem_file");
|
|
sysfs_remove_group(&dev->kobj, &claw_attr_group);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------*
|
|
* claw_init and cleanup *
|
|
*---------------------------------------------------------------------*/
|
|
|
|
static void __exit
|
|
claw_cleanup(void)
|
|
{
|
|
driver_remove_file(&claw_group_driver.driver,
|
|
&driver_attr_group);
|
|
ccwgroup_driver_unregister(&claw_group_driver);
|
|
ccw_driver_unregister(&claw_ccw_driver);
|
|
root_device_unregister(claw_root_dev);
|
|
claw_unregister_debug_facility();
|
|
pr_info("Driver unloaded\n");
|
|
|
|
}
|
|
|
|
/**
|
|
* Initialize module.
|
|
* This is called just after the module is loaded.
|
|
*
|
|
* @return 0 on success, !0 on error.
|
|
*/
|
|
static int __init
|
|
claw_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
pr_info("Loading %s\n", version);
|
|
ret = claw_register_debug_facility();
|
|
if (ret) {
|
|
pr_err("Registering with the S/390 debug feature"
|
|
" failed with error code %d\n", ret);
|
|
goto out_err;
|
|
}
|
|
CLAW_DBF_TEXT(2, setup, "init_mod");
|
|
claw_root_dev = root_device_register("claw");
|
|
ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
|
|
if (ret)
|
|
goto register_err;
|
|
ret = ccw_driver_register(&claw_ccw_driver);
|
|
if (ret)
|
|
goto ccw_err;
|
|
claw_group_driver.driver.groups = claw_group_attr_groups;
|
|
ret = ccwgroup_driver_register(&claw_group_driver);
|
|
if (ret)
|
|
goto ccwgroup_err;
|
|
return 0;
|
|
|
|
ccwgroup_err:
|
|
ccw_driver_unregister(&claw_ccw_driver);
|
|
ccw_err:
|
|
root_device_unregister(claw_root_dev);
|
|
register_err:
|
|
CLAW_DBF_TEXT(2, setup, "init_bad");
|
|
claw_unregister_debug_facility();
|
|
out_err:
|
|
pr_err("Initializing the claw device driver failed\n");
|
|
return ret;
|
|
}
|
|
|
|
module_init(claw_init);
|
|
module_exit(claw_cleanup);
|
|
|
|
MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
|
|
MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
|
|
"Copyright 2000,2008 IBM Corporation\n");
|
|
MODULE_LICENSE("GPL");
|