![Harvey Harrison](/assets/img/avatar_default.png)
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2186 lines
59 KiB
C
2186 lines
59 KiB
C
/*
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* drivers/s390/net/ctcm_mpc.c
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*
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* Copyright IBM Corp. 2004, 2007
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* Authors: Belinda Thompson (belindat@us.ibm.com)
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* Andy Richter (richtera@us.ibm.com)
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* Peter Tiedemann (ptiedem@de.ibm.com)
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*/
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/*
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This module exports functions to be used by CCS:
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EXPORT_SYMBOL(ctc_mpc_alloc_channel);
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EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
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EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
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EXPORT_SYMBOL(ctc_mpc_flow_control);
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*/
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#undef DEBUG
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#undef DEBUGDATA
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#undef DEBUGCCW
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/signal.h>
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#include <linux/string.h>
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#include <linux/proc_fs.h>
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#include <linux/ip.h>
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#include <linux/if_arp.h>
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#include <linux/tcp.h>
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#include <linux/skbuff.h>
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#include <linux/ctype.h>
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#include <linux/netdevice.h>
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#include <net/dst.h>
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#include <linux/io.h> /* instead of <asm/io.h> ok ? */
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#include <asm/ccwdev.h>
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#include <asm/ccwgroup.h>
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#include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */
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#include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */
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#include <linux/wait.h>
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#include <linux/moduleparam.h>
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#include <asm/idals.h>
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#include "cu3088.h"
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#include "ctcm_mpc.h"
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#include "ctcm_main.h"
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#include "ctcm_fsms.h"
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static const struct xid2 init_xid = {
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.xid2_type_id = XID_FM2,
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.xid2_len = 0x45,
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.xid2_adj_id = 0,
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.xid2_rlen = 0x31,
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.xid2_resv1 = 0,
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.xid2_flag1 = 0,
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.xid2_fmtt = 0,
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.xid2_flag4 = 0x80,
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.xid2_resv2 = 0,
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.xid2_tgnum = 0,
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.xid2_sender_id = 0,
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.xid2_flag2 = 0,
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.xid2_option = XID2_0,
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.xid2_resv3 = "\x00",
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.xid2_resv4 = 0,
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.xid2_dlc_type = XID2_READ_SIDE,
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.xid2_resv5 = 0,
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.xid2_mpc_flag = 0,
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.xid2_resv6 = 0,
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.xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35),
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};
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static const struct th_header thnorm = {
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.th_seg = 0x00,
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.th_ch_flag = TH_IS_XID,
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.th_blk_flag = TH_DATA_IS_XID,
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.th_is_xid = 0x01,
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.th_seq_num = 0x00000000,
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};
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static const struct th_header thdummy = {
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.th_seg = 0x00,
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.th_ch_flag = 0x00,
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.th_blk_flag = TH_DATA_IS_XID,
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.th_is_xid = 0x01,
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.th_seq_num = 0x00000000,
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};
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/*
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* Definition of one MPC group
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*/
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/*
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* Compatibility macros for busy handling
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* of network devices.
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*/
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static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb);
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/*
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* MPC Group state machine actions (static prototypes)
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*/
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static void mpc_action_nop(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg);
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static void mpc_action_timeout(fsm_instance *fi, int event, void *arg);
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static int mpc_validate_xid(struct mpcg_info *mpcginfo);
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static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg);
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static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg);
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#ifdef DEBUGDATA
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/*-------------------------------------------------------------------*
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* Dump buffer format *
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* *
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*--------------------------------------------------------------------*/
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void ctcmpc_dumpit(char *buf, int len)
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{
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__u32 ct, sw, rm, dup;
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char *ptr, *rptr;
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char tbuf[82], tdup[82];
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#if (UTS_MACHINE == s390x)
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char addr[22];
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#else
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char addr[12];
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#endif
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char boff[12];
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char bhex[82], duphex[82];
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char basc[40];
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sw = 0;
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rptr = ptr = buf;
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rm = 16;
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duphex[0] = 0x00;
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dup = 0;
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for (ct = 0; ct < len; ct++, ptr++, rptr++) {
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if (sw == 0) {
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#if (UTS_MACHINE == s390x)
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sprintf(addr, "%16.16lx", (__u64)rptr);
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#else
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sprintf(addr, "%8.8X", (__u32)rptr);
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#endif
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sprintf(boff, "%4.4X", (__u32)ct);
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bhex[0] = '\0';
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basc[0] = '\0';
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}
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if ((sw == 4) || (sw == 12))
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strcat(bhex, " ");
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if (sw == 8)
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strcat(bhex, " ");
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#if (UTS_MACHINE == s390x)
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sprintf(tbuf, "%2.2lX", (__u64)*ptr);
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#else
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sprintf(tbuf, "%2.2X", (__u32)*ptr);
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#endif
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tbuf[2] = '\0';
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strcat(bhex, tbuf);
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if ((0 != isprint(*ptr)) && (*ptr >= 0x20))
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basc[sw] = *ptr;
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else
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basc[sw] = '.';
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basc[sw+1] = '\0';
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sw++;
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rm--;
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if (sw != 16)
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continue;
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if ((strcmp(duphex, bhex)) != 0) {
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if (dup != 0) {
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sprintf(tdup,
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"Duplicate as above to %s", addr);
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ctcm_pr_debug(" --- %s ---\n",
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tdup);
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}
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ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
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addr, boff, bhex, basc);
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dup = 0;
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strcpy(duphex, bhex);
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} else
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dup++;
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sw = 0;
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rm = 16;
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} /* endfor */
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if (sw != 0) {
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for ( ; rm > 0; rm--, sw++) {
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if ((sw == 4) || (sw == 12))
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strcat(bhex, " ");
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if (sw == 8)
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strcat(bhex, " ");
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strcat(bhex, " ");
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strcat(basc, " ");
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}
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if (dup != 0) {
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sprintf(tdup, "Duplicate as above to %s", addr);
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ctcm_pr_debug(" --- %s ---\n", tdup);
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}
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ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
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addr, boff, bhex, basc);
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} else {
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if (dup >= 1) {
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sprintf(tdup, "Duplicate as above to %s", addr);
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ctcm_pr_debug(" --- %s ---\n", tdup);
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}
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if (dup != 0) {
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ctcm_pr_debug(" %s (+%s) : %s [%s]\n",
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addr, boff, bhex, basc);
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}
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}
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return;
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} /* end of ctcmpc_dumpit */
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#endif
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#ifdef DEBUGDATA
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/*
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* Dump header and first 16 bytes of an sk_buff for debugging purposes.
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*
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* skb The sk_buff to dump.
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* offset Offset relative to skb-data, where to start the dump.
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*/
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void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
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{
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__u8 *p = skb->data;
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struct th_header *header;
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struct pdu *pheader;
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int bl = skb->len;
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int i;
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if (p == NULL)
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return;
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p += offset;
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header = (struct th_header *)p;
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ctcm_pr_debug("dump:\n");
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ctcm_pr_debug("skb len=%d \n", skb->len);
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if (skb->len > 2) {
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switch (header->th_ch_flag) {
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case TH_HAS_PDU:
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break;
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case 0x00:
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case TH_IS_XID:
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if ((header->th_blk_flag == TH_DATA_IS_XID) &&
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(header->th_is_xid == 0x01))
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goto dumpth;
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case TH_SWEEP_REQ:
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goto dumpth;
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case TH_SWEEP_RESP:
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goto dumpth;
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default:
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break;
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}
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pheader = (struct pdu *)p;
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ctcm_pr_debug("pdu->offset: %d hex: %04x\n",
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pheader->pdu_offset, pheader->pdu_offset);
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ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag);
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ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto);
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ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq);
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goto dumpdata;
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dumpth:
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ctcm_pr_debug("th->seg : %02x\n", header->th_seg);
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ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag);
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ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag);
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ctcm_pr_debug("th->type : %s\n",
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(header->th_is_xid) ? "DATA" : "XID");
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ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num);
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}
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dumpdata:
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if (bl > 32)
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bl = 32;
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ctcm_pr_debug("data: ");
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for (i = 0; i < bl; i++)
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ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n");
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ctcm_pr_debug("\n");
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}
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#endif
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static struct net_device *ctcmpc_get_dev(int port_num)
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{
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char device[20];
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struct net_device *dev;
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struct ctcm_priv *priv;
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sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num);
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dev = __dev_get_by_name(&init_net, device);
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if (dev == NULL) {
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CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
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"%s: Device not found by name: %s",
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CTCM_FUNTAIL, device);
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return NULL;
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}
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priv = dev->ml_priv;
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if (priv == NULL) {
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CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
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"%s(%s): dev->ml_priv is NULL",
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CTCM_FUNTAIL, device);
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return NULL;
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}
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if (priv->mpcg == NULL) {
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CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
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"%s(%s): priv->mpcg is NULL",
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CTCM_FUNTAIL, device);
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return NULL;
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}
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return dev;
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}
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/*
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* ctc_mpc_alloc_channel
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* (exported interface)
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*
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* Device Initialization :
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* ACTPATH driven IO operations
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*/
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int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int))
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{
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struct net_device *dev;
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struct mpc_group *grp;
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struct ctcm_priv *priv;
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dev = ctcmpc_get_dev(port_num);
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if (dev == NULL)
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return 1;
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priv = dev->ml_priv;
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grp = priv->mpcg;
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grp->allochanfunc = callback;
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grp->port_num = port_num;
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grp->port_persist = 1;
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CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
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"%s(%s): state=%s",
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CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
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switch (fsm_getstate(grp->fsm)) {
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case MPCG_STATE_INOP:
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/* Group is in the process of terminating */
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grp->alloc_called = 1;
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break;
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case MPCG_STATE_RESET:
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/* MPC Group will transition to state */
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/* MPCG_STATE_XID2INITW iff the minimum number */
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/* of 1 read and 1 write channel have successfully*/
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/* activated */
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/*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/
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if (callback)
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grp->send_qllc_disc = 1;
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case MPCG_STATE_XID0IOWAIT:
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fsm_deltimer(&grp->timer);
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grp->outstanding_xid2 = 0;
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grp->outstanding_xid7 = 0;
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grp->outstanding_xid7_p2 = 0;
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grp->saved_xid2 = NULL;
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if (callback)
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ctcm_open(dev);
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fsm_event(priv->fsm, DEV_EVENT_START, dev);
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break;
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case MPCG_STATE_READY:
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/* XID exchanges completed after PORT was activated */
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/* Link station already active */
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/* Maybe timing issue...retry callback */
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grp->allocchan_callback_retries++;
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if (grp->allocchan_callback_retries < 4) {
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if (grp->allochanfunc)
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grp->allochanfunc(grp->port_num,
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grp->group_max_buflen);
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} else {
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/* there are problems...bail out */
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/* there may be a state mismatch so restart */
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grp->port_persist = 1;
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fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
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grp->allocchan_callback_retries = 0;
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}
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL(ctc_mpc_alloc_channel);
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/*
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* ctc_mpc_establish_connectivity
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* (exported interface)
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*/
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void ctc_mpc_establish_connectivity(int port_num,
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void (*callback)(int, int, int))
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{
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struct net_device *dev;
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struct mpc_group *grp;
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struct ctcm_priv *priv;
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struct channel *rch, *wch;
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dev = ctcmpc_get_dev(port_num);
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if (dev == NULL)
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return;
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priv = dev->ml_priv;
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grp = priv->mpcg;
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rch = priv->channel[READ];
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wch = priv->channel[WRITE];
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CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
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"%s(%s): state=%s",
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CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm));
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grp->estconnfunc = callback;
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grp->port_num = port_num;
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|
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switch (fsm_getstate(grp->fsm)) {
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case MPCG_STATE_READY:
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/* XID exchanges completed after PORT was activated */
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/* Link station already active */
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/* Maybe timing issue...retry callback */
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fsm_deltimer(&grp->timer);
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grp->estconn_callback_retries++;
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if (grp->estconn_callback_retries < 4) {
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if (grp->estconnfunc) {
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grp->estconnfunc(grp->port_num, 0,
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grp->group_max_buflen);
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grp->estconnfunc = NULL;
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}
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} else {
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/* there are problems...bail out */
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fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
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grp->estconn_callback_retries = 0;
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}
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break;
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case MPCG_STATE_INOP:
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case MPCG_STATE_RESET:
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/* MPC Group is not ready to start XID - min num of */
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/* 1 read and 1 write channel have not been acquired*/
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CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
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"%s(%s): REJECTED - inactive channels",
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CTCM_FUNTAIL, dev->name);
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if (grp->estconnfunc) {
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grp->estconnfunc(grp->port_num, -1, 0);
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grp->estconnfunc = NULL;
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}
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break;
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case MPCG_STATE_XID2INITW:
|
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/* alloc channel was called but no XID exchange */
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/* has occurred. initiate xside XID exchange */
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/* make sure yside XID0 processing has not started */
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|
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if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) ||
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(fsm_getstate(wch->fsm) > CH_XID0_PENDING)) {
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CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
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"%s(%s): ABORT - PASSIVE XID",
|
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CTCM_FUNTAIL, dev->name);
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break;
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}
|
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grp->send_qllc_disc = 1;
|
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fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT);
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fsm_deltimer(&grp->timer);
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fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE,
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MPCG_EVENT_TIMER, dev);
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grp->outstanding_xid7 = 0;
|
|
grp->outstanding_xid7_p2 = 0;
|
|
grp->saved_xid2 = NULL;
|
|
if ((rch->in_mpcgroup) &&
|
|
(fsm_getstate(rch->fsm) == CH_XID0_PENDING))
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch);
|
|
else {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): RX-%s not ready for ACTIVE XID0",
|
|
CTCM_FUNTAIL, dev->name, rch->id);
|
|
if (grp->estconnfunc) {
|
|
grp->estconnfunc(grp->port_num, -1, 0);
|
|
grp->estconnfunc = NULL;
|
|
}
|
|
fsm_deltimer(&grp->timer);
|
|
goto done;
|
|
}
|
|
if ((wch->in_mpcgroup) &&
|
|
(fsm_getstate(wch->fsm) == CH_XID0_PENDING))
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch);
|
|
else {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): WX-%s not ready for ACTIVE XID0",
|
|
CTCM_FUNTAIL, dev->name, wch->id);
|
|
if (grp->estconnfunc) {
|
|
grp->estconnfunc(grp->port_num, -1, 0);
|
|
grp->estconnfunc = NULL;
|
|
}
|
|
fsm_deltimer(&grp->timer);
|
|
goto done;
|
|
}
|
|
break;
|
|
case MPCG_STATE_XID0IOWAIT:
|
|
/* already in active XID negotiations */
|
|
default:
|
|
break;
|
|
}
|
|
|
|
done:
|
|
CTCM_PR_DEBUG("Exit %s()\n", __func__);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(ctc_mpc_establish_connectivity);
|
|
|
|
/*
|
|
* ctc_mpc_dealloc_ch
|
|
* (exported interface)
|
|
*/
|
|
void ctc_mpc_dealloc_ch(int port_num)
|
|
{
|
|
struct net_device *dev;
|
|
struct ctcm_priv *priv;
|
|
struct mpc_group *grp;
|
|
|
|
dev = ctcmpc_get_dev(port_num);
|
|
if (dev == NULL)
|
|
return;
|
|
priv = dev->ml_priv;
|
|
grp = priv->mpcg;
|
|
|
|
CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG,
|
|
"%s: %s: refcount = %d\n",
|
|
CTCM_FUNTAIL, dev->name, atomic_read(&dev->refcnt));
|
|
|
|
fsm_deltimer(&priv->restart_timer);
|
|
grp->channels_terminating = 0;
|
|
fsm_deltimer(&grp->timer);
|
|
grp->allochanfunc = NULL;
|
|
grp->estconnfunc = NULL;
|
|
grp->port_persist = 0;
|
|
grp->send_qllc_disc = 0;
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
|
|
ctcm_close(dev);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(ctc_mpc_dealloc_ch);
|
|
|
|
/*
|
|
* ctc_mpc_flow_control
|
|
* (exported interface)
|
|
*/
|
|
void ctc_mpc_flow_control(int port_num, int flowc)
|
|
{
|
|
struct ctcm_priv *priv;
|
|
struct mpc_group *grp;
|
|
struct net_device *dev;
|
|
struct channel *rch;
|
|
int mpcg_state;
|
|
|
|
dev = ctcmpc_get_dev(port_num);
|
|
if (dev == NULL)
|
|
return;
|
|
priv = dev->ml_priv;
|
|
grp = priv->mpcg;
|
|
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
|
|
"%s: %s: flowc = %d",
|
|
CTCM_FUNTAIL, dev->name, flowc);
|
|
|
|
rch = priv->channel[READ];
|
|
|
|
mpcg_state = fsm_getstate(grp->fsm);
|
|
switch (flowc) {
|
|
case 1:
|
|
if (mpcg_state == MPCG_STATE_FLOWC)
|
|
break;
|
|
if (mpcg_state == MPCG_STATE_READY) {
|
|
if (grp->flow_off_called == 1)
|
|
grp->flow_off_called = 0;
|
|
else
|
|
fsm_newstate(grp->fsm, MPCG_STATE_FLOWC);
|
|
break;
|
|
}
|
|
break;
|
|
case 0:
|
|
if (mpcg_state == MPCG_STATE_FLOWC) {
|
|
fsm_newstate(grp->fsm, MPCG_STATE_READY);
|
|
/* ensure any data that has accumulated */
|
|
/* on the io_queue will now be sen t */
|
|
tasklet_schedule(&rch->ch_tasklet);
|
|
}
|
|
/* possible race condition */
|
|
if (mpcg_state == MPCG_STATE_READY) {
|
|
grp->flow_off_called = 1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
}
|
|
EXPORT_SYMBOL(ctc_mpc_flow_control);
|
|
|
|
static int mpc_send_qllc_discontact(struct net_device *);
|
|
|
|
/*
|
|
* helper function of ctcmpc_unpack_skb
|
|
*/
|
|
static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo)
|
|
{
|
|
struct channel *rch = mpcginfo->ch;
|
|
struct net_device *dev = rch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
struct channel *ch = priv->channel[WRITE];
|
|
|
|
CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id);
|
|
CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
|
|
|
|
grp->sweep_rsp_pend_num--;
|
|
|
|
if ((grp->sweep_req_pend_num == 0) &&
|
|
(grp->sweep_rsp_pend_num == 0)) {
|
|
fsm_deltimer(&ch->sweep_timer);
|
|
grp->in_sweep = 0;
|
|
rch->th_seq_num = 0x00;
|
|
ch->th_seq_num = 0x00;
|
|
ctcm_clear_busy_do(dev);
|
|
}
|
|
|
|
kfree(mpcginfo);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
* helper function of mpc_rcvd_sweep_req
|
|
* which is a helper of ctcmpc_unpack_skb
|
|
*/
|
|
static void ctcmpc_send_sweep_resp(struct channel *rch)
|
|
{
|
|
struct net_device *dev = rch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
int rc = 0;
|
|
struct th_sweep *header;
|
|
struct sk_buff *sweep_skb;
|
|
struct channel *ch = priv->channel[WRITE];
|
|
|
|
CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id);
|
|
|
|
sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
|
|
if (sweep_skb == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): sweep_skb allocation ERROR\n",
|
|
CTCM_FUNTAIL, rch->id);
|
|
rc = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
header = (struct th_sweep *)
|
|
kmalloc(sizeof(struct th_sweep), gfp_type());
|
|
|
|
if (!header) {
|
|
dev_kfree_skb_any(sweep_skb);
|
|
rc = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
header->th.th_seg = 0x00 ;
|
|
header->th.th_ch_flag = TH_SWEEP_RESP;
|
|
header->th.th_blk_flag = 0x00;
|
|
header->th.th_is_xid = 0x00;
|
|
header->th.th_seq_num = 0x00;
|
|
header->sw.th_last_seq = ch->th_seq_num;
|
|
|
|
memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH);
|
|
|
|
kfree(header);
|
|
|
|
dev->trans_start = jiffies;
|
|
skb_queue_tail(&ch->sweep_queue, sweep_skb);
|
|
|
|
fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch);
|
|
|
|
return;
|
|
|
|
done:
|
|
if (rc != 0) {
|
|
grp->in_sweep = 0;
|
|
ctcm_clear_busy_do(dev);
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* helper function of ctcmpc_unpack_skb
|
|
*/
|
|
static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo)
|
|
{
|
|
struct channel *rch = mpcginfo->ch;
|
|
struct net_device *dev = rch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
struct channel *ch = priv->channel[WRITE];
|
|
|
|
if (do_debug)
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
|
|
" %s(): ch=0x%p id=%s\n", __func__, ch, ch->id);
|
|
|
|
if (grp->in_sweep == 0) {
|
|
grp->in_sweep = 1;
|
|
ctcm_test_and_set_busy(dev);
|
|
grp->sweep_req_pend_num = grp->active_channels[READ];
|
|
grp->sweep_rsp_pend_num = grp->active_channels[READ];
|
|
}
|
|
|
|
CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH);
|
|
|
|
grp->sweep_req_pend_num--;
|
|
ctcmpc_send_sweep_resp(ch);
|
|
kfree(mpcginfo);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM definitions
|
|
*/
|
|
static const char *mpcg_event_names[] = {
|
|
[MPCG_EVENT_INOP] = "INOP Condition",
|
|
[MPCG_EVENT_DISCONC] = "Discontact Received",
|
|
[MPCG_EVENT_XID0DO] = "Channel Active - Start XID",
|
|
[MPCG_EVENT_XID2] = "XID2 Received",
|
|
[MPCG_EVENT_XID2DONE] = "XID0 Complete",
|
|
[MPCG_EVENT_XID7DONE] = "XID7 Complete",
|
|
[MPCG_EVENT_TIMER] = "XID Setup Timer",
|
|
[MPCG_EVENT_DOIO] = "XID DoIO",
|
|
};
|
|
|
|
static const char *mpcg_state_names[] = {
|
|
[MPCG_STATE_RESET] = "Reset",
|
|
[MPCG_STATE_INOP] = "INOP",
|
|
[MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start",
|
|
[MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete",
|
|
[MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start",
|
|
[MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete",
|
|
[MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start",
|
|
[MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete",
|
|
[MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start",
|
|
[MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ",
|
|
[MPCG_STATE_XID7INITF] = "XID - XID7 Complete ",
|
|
[MPCG_STATE_FLOWC] = "FLOW CONTROL ON",
|
|
[MPCG_STATE_READY] = "READY",
|
|
};
|
|
|
|
/*
|
|
* The MPC Group Station FSM
|
|
* 22 events
|
|
*/
|
|
static const fsm_node mpcg_fsm[] = {
|
|
{ MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop },
|
|
{ MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
|
|
{ MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
|
|
{ MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
|
|
{ MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
|
|
{ MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
|
|
|
|
{ MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
|
|
{ MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
|
|
{ MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
|
|
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid },
|
|
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid },
|
|
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid },
|
|
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 },
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 },
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid },
|
|
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid },
|
|
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 },
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 },
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact },
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout },
|
|
{ MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid },
|
|
|
|
{ MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop },
|
|
{ MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready },
|
|
};
|
|
|
|
static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm);
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
struct net_device *dev = arg;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
if (grp == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): No MPC group",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
fsm_deltimer(&grp->timer);
|
|
|
|
if (grp->saved_xid2->xid2_flag2 == 0x40) {
|
|
priv->xid->xid2_flag2 = 0x00;
|
|
if (grp->estconnfunc) {
|
|
grp->estconnfunc(grp->port_num, 1,
|
|
grp->group_max_buflen);
|
|
grp->estconnfunc = NULL;
|
|
} else if (grp->allochanfunc)
|
|
grp->send_qllc_disc = 1;
|
|
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): fails",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
grp->port_persist = 1;
|
|
grp->out_of_sequence = 0;
|
|
grp->estconn_called = 0;
|
|
|
|
tasklet_hi_schedule(&grp->mpc_tasklet2);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* helper of ctcm_init_netdevice
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
void mpc_group_ready(unsigned long adev)
|
|
{
|
|
struct net_device *dev = (struct net_device *)adev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
struct channel *ch = NULL;
|
|
|
|
if (grp == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): No MPC group",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE,
|
|
"%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n",
|
|
CTCM_FUNTAIL, dev->name, grp->group_max_buflen);
|
|
|
|
fsm_newstate(grp->fsm, MPCG_STATE_READY);
|
|
|
|
/* Put up a read on the channel */
|
|
ch = priv->channel[READ];
|
|
ch->pdu_seq = 0;
|
|
CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" ,
|
|
__func__, ch->pdu_seq);
|
|
|
|
ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch);
|
|
/* Put the write channel in idle state */
|
|
ch = priv->channel[WRITE];
|
|
if (ch->collect_len > 0) {
|
|
spin_lock(&ch->collect_lock);
|
|
ctcm_purge_skb_queue(&ch->collect_queue);
|
|
ch->collect_len = 0;
|
|
spin_unlock(&ch->collect_lock);
|
|
}
|
|
ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch);
|
|
ctcm_clear_busy(dev);
|
|
|
|
if (grp->estconnfunc) {
|
|
grp->estconnfunc(grp->port_num, 0,
|
|
grp->group_max_buflen);
|
|
grp->estconnfunc = NULL;
|
|
} else if (grp->allochanfunc)
|
|
grp->allochanfunc(grp->port_num, grp->group_max_buflen);
|
|
|
|
grp->send_qllc_disc = 1;
|
|
grp->changed_side = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
* Increment the MPC Group Active Channel Counts
|
|
* helper of dev_action (called from channel fsm)
|
|
*/
|
|
void mpc_channel_action(struct channel *ch, int direction, int action)
|
|
{
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
if (grp == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): No MPC group",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id);
|
|
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
|
|
"%s: %i / Grp:%s total_channels=%i, active_channels: "
|
|
"read=%i, write=%i\n", __func__, action,
|
|
fsm_getstate_str(grp->fsm), grp->num_channel_paths,
|
|
grp->active_channels[READ], grp->active_channels[WRITE]);
|
|
|
|
if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) {
|
|
grp->num_channel_paths++;
|
|
grp->active_channels[direction]++;
|
|
grp->outstanding_xid2++;
|
|
ch->in_mpcgroup = 1;
|
|
|
|
if (ch->xid_skb != NULL)
|
|
dev_kfree_skb_any(ch->xid_skb);
|
|
|
|
ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT,
|
|
GFP_ATOMIC | GFP_DMA);
|
|
if (ch->xid_skb == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): Couldn't alloc ch xid_skb\n",
|
|
CTCM_FUNTAIL, dev->name);
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
return;
|
|
}
|
|
ch->xid_skb_data = ch->xid_skb->data;
|
|
ch->xid_th = (struct th_header *)ch->xid_skb->data;
|
|
skb_put(ch->xid_skb, TH_HEADER_LENGTH);
|
|
ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb);
|
|
skb_put(ch->xid_skb, XID2_LENGTH);
|
|
ch->xid_id = skb_tail_pointer(ch->xid_skb);
|
|
ch->xid_skb->data = ch->xid_skb_data;
|
|
skb_reset_tail_pointer(ch->xid_skb);
|
|
ch->xid_skb->len = 0;
|
|
|
|
memcpy(skb_put(ch->xid_skb, grp->xid_skb->len),
|
|
grp->xid_skb->data,
|
|
grp->xid_skb->len);
|
|
|
|
ch->xid->xid2_dlc_type = ((CHANNEL_DIRECTION(ch->flags) == READ)
|
|
? XID2_READ_SIDE : XID2_WRITE_SIDE);
|
|
|
|
if (CHANNEL_DIRECTION(ch->flags) == WRITE)
|
|
ch->xid->xid2_buf_len = 0x00;
|
|
|
|
ch->xid_skb->data = ch->xid_skb_data;
|
|
skb_reset_tail_pointer(ch->xid_skb);
|
|
ch->xid_skb->len = 0;
|
|
|
|
fsm_newstate(ch->fsm, CH_XID0_PENDING);
|
|
|
|
if ((grp->active_channels[READ] > 0) &&
|
|
(grp->active_channels[WRITE] > 0) &&
|
|
(fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) {
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);
|
|
CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE,
|
|
"%s: %s: MPC GROUP CHANNELS ACTIVE\n",
|
|
__func__, dev->name);
|
|
}
|
|
} else if ((action == MPC_CHANNEL_REMOVE) &&
|
|
(ch->in_mpcgroup == 1)) {
|
|
ch->in_mpcgroup = 0;
|
|
grp->num_channel_paths--;
|
|
grp->active_channels[direction]--;
|
|
|
|
if (ch->xid_skb != NULL)
|
|
dev_kfree_skb_any(ch->xid_skb);
|
|
ch->xid_skb = NULL;
|
|
|
|
if (grp->channels_terminating)
|
|
goto done;
|
|
|
|
if (((grp->active_channels[READ] == 0) &&
|
|
(grp->active_channels[WRITE] > 0))
|
|
|| ((grp->active_channels[WRITE] == 0) &&
|
|
(grp->active_channels[READ] > 0)))
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
}
|
|
done:
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
|
|
"exit %s: %i / Grp:%s total_channels=%i, active_channels: "
|
|
"read=%i, write=%i\n", __func__, action,
|
|
fsm_getstate_str(grp->fsm), grp->num_channel_paths,
|
|
grp->active_channels[READ], grp->active_channels[WRITE]);
|
|
|
|
CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id);
|
|
}
|
|
|
|
/**
|
|
* Unpack a just received skb and hand it over to
|
|
* upper layers.
|
|
* special MPC version of unpack_skb.
|
|
*
|
|
* ch The channel where this skb has been received.
|
|
* pskb The received skb.
|
|
*/
|
|
static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb)
|
|
{
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
struct pdu *curr_pdu;
|
|
struct mpcg_info *mpcginfo;
|
|
struct th_header *header = NULL;
|
|
struct th_sweep *sweep = NULL;
|
|
int pdu_last_seen = 0;
|
|
__u32 new_len;
|
|
struct sk_buff *skb;
|
|
int skblen;
|
|
int sendrc = 0;
|
|
|
|
CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n",
|
|
__func__, dev->name, smp_processor_id(), ch->id);
|
|
|
|
header = (struct th_header *)pskb->data;
|
|
if ((header->th_seg == 0) &&
|
|
(header->th_ch_flag == 0) &&
|
|
(header->th_blk_flag == 0) &&
|
|
(header->th_seq_num == 0))
|
|
/* nothing for us */ goto done;
|
|
|
|
CTCM_PR_DBGDATA("%s: th_header\n", __func__);
|
|
CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH);
|
|
CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len);
|
|
|
|
pskb->dev = dev;
|
|
pskb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
skb_pull(pskb, TH_HEADER_LENGTH);
|
|
|
|
if (likely(header->th_ch_flag == TH_HAS_PDU)) {
|
|
CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__);
|
|
if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) ||
|
|
((fsm_getstate(grp->fsm) == MPCG_STATE_READY) &&
|
|
(header->th_seq_num != ch->th_seq_num + 1) &&
|
|
(ch->th_seq_num != 0))) {
|
|
/* This is NOT the next segment *
|
|
* we are not the correct race winner *
|
|
* go away and let someone else win *
|
|
* BUT..this only applies if xid negot *
|
|
* is done *
|
|
*/
|
|
grp->out_of_sequence += 1;
|
|
__skb_push(pskb, TH_HEADER_LENGTH);
|
|
skb_queue_tail(&ch->io_queue, pskb);
|
|
CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x "
|
|
"got:%08x\n", __func__,
|
|
ch->th_seq_num + 1, header->th_seq_num);
|
|
|
|
return;
|
|
}
|
|
grp->out_of_sequence = 0;
|
|
ch->th_seq_num = header->th_seq_num;
|
|
|
|
CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n",
|
|
__func__, ch->th_seq_num);
|
|
|
|
if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY))
|
|
goto done;
|
|
pdu_last_seen = 0;
|
|
while ((pskb->len > 0) && !pdu_last_seen) {
|
|
curr_pdu = (struct pdu *)pskb->data;
|
|
|
|
CTCM_PR_DBGDATA("%s: pdu_header\n", __func__);
|
|
CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH);
|
|
CTCM_PR_DBGDATA("%s: pskb len: %04x \n",
|
|
__func__, pskb->len);
|
|
|
|
skb_pull(pskb, PDU_HEADER_LENGTH);
|
|
|
|
if (curr_pdu->pdu_flag & PDU_LAST)
|
|
pdu_last_seen = 1;
|
|
if (curr_pdu->pdu_flag & PDU_CNTL)
|
|
pskb->protocol = htons(ETH_P_SNAP);
|
|
else
|
|
pskb->protocol = htons(ETH_P_SNA_DIX);
|
|
|
|
if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): Dropping packet with "
|
|
"illegal siize %d",
|
|
CTCM_FUNTAIL, dev->name, pskb->len);
|
|
|
|
priv->stats.rx_dropped++;
|
|
priv->stats.rx_length_errors++;
|
|
goto done;
|
|
}
|
|
skb_reset_mac_header(pskb);
|
|
new_len = curr_pdu->pdu_offset;
|
|
CTCM_PR_DBGDATA("%s: new_len: %04x \n",
|
|
__func__, new_len);
|
|
if ((new_len == 0) || (new_len > pskb->len)) {
|
|
/* should never happen */
|
|
/* pskb len must be hosed...bail out */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): non valid pdu_offset: %04x",
|
|
/* "data may be lost", */
|
|
CTCM_FUNTAIL, dev->name, new_len);
|
|
goto done;
|
|
}
|
|
skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC);
|
|
|
|
if (!skb) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): MEMORY allocation error",
|
|
CTCM_FUNTAIL, dev->name);
|
|
priv->stats.rx_dropped++;
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
goto done;
|
|
}
|
|
memcpy(skb_put(skb, new_len), pskb->data, new_len);
|
|
|
|
skb_reset_mac_header(skb);
|
|
skb->dev = pskb->dev;
|
|
skb->protocol = pskb->protocol;
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
*((__u32 *) skb_push(skb, 4)) = ch->pdu_seq;
|
|
ch->pdu_seq++;
|
|
|
|
if (do_debug_data) {
|
|
ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n",
|
|
__func__, ch->pdu_seq);
|
|
ctcm_pr_debug("%s: skb:%0lx "
|
|
"skb len: %d \n", __func__,
|
|
(unsigned long)skb, skb->len);
|
|
ctcm_pr_debug("%s: up to 32 bytes "
|
|
"of pdu_data sent\n", __func__);
|
|
ctcmpc_dump32((char *)skb->data, skb->len);
|
|
}
|
|
|
|
skblen = skb->len;
|
|
sendrc = netif_rx(skb);
|
|
priv->stats.rx_packets++;
|
|
priv->stats.rx_bytes += skblen;
|
|
skb_pull(pskb, new_len); /* point to next PDU */
|
|
}
|
|
} else {
|
|
mpcginfo = (struct mpcg_info *)
|
|
kmalloc(sizeof(struct mpcg_info), gfp_type());
|
|
if (mpcginfo == NULL)
|
|
goto done;
|
|
|
|
mpcginfo->ch = ch;
|
|
mpcginfo->th = header;
|
|
mpcginfo->skb = pskb;
|
|
CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n",
|
|
__func__);
|
|
/* it's a sweep? */
|
|
sweep = (struct th_sweep *)pskb->data;
|
|
mpcginfo->sweep = sweep;
|
|
if (header->th_ch_flag == TH_SWEEP_REQ)
|
|
mpc_rcvd_sweep_req(mpcginfo);
|
|
else if (header->th_ch_flag == TH_SWEEP_RESP)
|
|
mpc_rcvd_sweep_resp(mpcginfo);
|
|
else if (header->th_blk_flag == TH_DATA_IS_XID) {
|
|
struct xid2 *thisxid = (struct xid2 *)pskb->data;
|
|
skb_pull(pskb, XID2_LENGTH);
|
|
mpcginfo->xid = thisxid;
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo);
|
|
} else if (header->th_blk_flag == TH_DISCONTACT)
|
|
fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo);
|
|
else if (header->th_seq_num != 0) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): control pkt expected\n",
|
|
CTCM_FUNTAIL, dev->name);
|
|
priv->stats.rx_dropped++;
|
|
/* mpcginfo only used for non-data transfers */
|
|
kfree(mpcginfo);
|
|
if (do_debug_data)
|
|
ctcmpc_dump_skb(pskb, -8);
|
|
}
|
|
}
|
|
done:
|
|
|
|
dev_kfree_skb_any(pskb);
|
|
if (sendrc == NET_RX_DROP) {
|
|
printk(KERN_WARNING "%s %s() NETWORK BACKLOG EXCEEDED"
|
|
" - PACKET DROPPED\n", dev->name, __func__);
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
}
|
|
|
|
CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
|
|
__func__, dev->name, ch, ch->id);
|
|
}
|
|
|
|
/**
|
|
* tasklet helper for mpc's skb unpacking.
|
|
*
|
|
* ch The channel to work on.
|
|
* Allow flow control back pressure to occur here.
|
|
* Throttling back channel can result in excessive
|
|
* channel inactivity and system deact of channel
|
|
*/
|
|
void ctcmpc_bh(unsigned long thischan)
|
|
{
|
|
struct channel *ch = (struct channel *)thischan;
|
|
struct sk_buff *skb;
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n",
|
|
dev->name, smp_processor_id(), __func__, ch->id);
|
|
/* caller has requested driver to throttle back */
|
|
while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) &&
|
|
(skb = skb_dequeue(&ch->io_queue))) {
|
|
ctcmpc_unpack_skb(ch, skb);
|
|
if (grp->out_of_sequence > 20) {
|
|
/* assume data loss has occurred if */
|
|
/* missing seq_num for extended */
|
|
/* period of time */
|
|
grp->out_of_sequence = 0;
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
break;
|
|
}
|
|
if (skb == skb_peek(&ch->io_queue))
|
|
break;
|
|
}
|
|
CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n",
|
|
__func__, dev->name, ch, ch->id);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Initializations
|
|
*/
|
|
struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv)
|
|
{
|
|
struct mpc_group *grp;
|
|
|
|
CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO,
|
|
"Enter %s(%p)", CTCM_FUNTAIL, priv);
|
|
|
|
grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL);
|
|
if (grp == NULL)
|
|
return NULL;
|
|
|
|
grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names,
|
|
MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm,
|
|
mpcg_fsm_len, GFP_KERNEL);
|
|
if (grp->fsm == NULL) {
|
|
kfree(grp);
|
|
return NULL;
|
|
}
|
|
|
|
fsm_newstate(grp->fsm, MPCG_STATE_RESET);
|
|
fsm_settimer(grp->fsm, &grp->timer);
|
|
|
|
grp->xid_skb =
|
|
__dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA);
|
|
if (grp->xid_skb == NULL) {
|
|
kfree_fsm(grp->fsm);
|
|
kfree(grp);
|
|
return NULL;
|
|
}
|
|
/* base xid for all channels in group */
|
|
grp->xid_skb_data = grp->xid_skb->data;
|
|
grp->xid_th = (struct th_header *)grp->xid_skb->data;
|
|
memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH),
|
|
&thnorm, TH_HEADER_LENGTH);
|
|
|
|
grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb);
|
|
memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH);
|
|
grp->xid->xid2_adj_id = jiffies | 0xfff00000;
|
|
grp->xid->xid2_sender_id = jiffies;
|
|
|
|
grp->xid_id = skb_tail_pointer(grp->xid_skb);
|
|
memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4);
|
|
|
|
grp->rcvd_xid_skb =
|
|
__dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA);
|
|
if (grp->rcvd_xid_skb == NULL) {
|
|
kfree_fsm(grp->fsm);
|
|
dev_kfree_skb(grp->xid_skb);
|
|
kfree(grp);
|
|
return NULL;
|
|
}
|
|
grp->rcvd_xid_data = grp->rcvd_xid_skb->data;
|
|
grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
|
|
memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH),
|
|
&thnorm, TH_HEADER_LENGTH);
|
|
grp->saved_xid2 = NULL;
|
|
priv->xid = grp->xid;
|
|
priv->mpcg = grp;
|
|
return grp;
|
|
}
|
|
|
|
/*
|
|
* The MPC Group Station FSM
|
|
*/
|
|
|
|
/*
|
|
* MPC Group Station FSM actions
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
|
|
/**
|
|
* NOP action for statemachines
|
|
*/
|
|
static void mpc_action_nop(fsm_instance *fi, int event, void *arg)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* invoked when the device transitions to dev_stopped
|
|
* MPC will stop each individual channel if a single XID failure
|
|
* occurs, or will intitiate all channels be stopped if a GROUP
|
|
* level failure occurs.
|
|
*/
|
|
static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg)
|
|
{
|
|
struct net_device *dev = arg;
|
|
struct ctcm_priv *priv;
|
|
struct mpc_group *grp;
|
|
int rc = 0;
|
|
struct channel *wch, *rch;
|
|
|
|
BUG_ON(dev == NULL);
|
|
CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name);
|
|
|
|
priv = dev->ml_priv;
|
|
grp = priv->mpcg;
|
|
grp->flow_off_called = 0;
|
|
fsm_deltimer(&grp->timer);
|
|
if (grp->channels_terminating)
|
|
return;
|
|
|
|
grp->channels_terminating = 1;
|
|
grp->saved_state = fsm_getstate(grp->fsm);
|
|
fsm_newstate(grp->fsm, MPCG_STATE_INOP);
|
|
if (grp->saved_state > MPCG_STATE_XID7INITF)
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
|
|
"%s(%s): MPC GROUP INOPERATIVE",
|
|
CTCM_FUNTAIL, dev->name);
|
|
if ((grp->saved_state != MPCG_STATE_RESET) ||
|
|
/* dealloc_channel has been called */
|
|
((grp->saved_state == MPCG_STATE_RESET) &&
|
|
(grp->port_persist == 0)))
|
|
fsm_deltimer(&priv->restart_timer);
|
|
|
|
wch = priv->channel[WRITE];
|
|
rch = priv->channel[READ];
|
|
|
|
switch (grp->saved_state) {
|
|
case MPCG_STATE_RESET:
|
|
case MPCG_STATE_INOP:
|
|
case MPCG_STATE_XID2INITW:
|
|
case MPCG_STATE_XID0IOWAIT:
|
|
case MPCG_STATE_XID2INITX:
|
|
case MPCG_STATE_XID7INITW:
|
|
case MPCG_STATE_XID7INITX:
|
|
case MPCG_STATE_XID0IOWAIX:
|
|
case MPCG_STATE_XID7INITI:
|
|
case MPCG_STATE_XID7INITZ:
|
|
case MPCG_STATE_XID7INITF:
|
|
break;
|
|
case MPCG_STATE_FLOWC:
|
|
case MPCG_STATE_READY:
|
|
default:
|
|
tasklet_hi_schedule(&wch->ch_disc_tasklet);
|
|
}
|
|
|
|
grp->xid2_tgnum = 0;
|
|
grp->group_max_buflen = 0; /*min of all received */
|
|
grp->outstanding_xid2 = 0;
|
|
grp->outstanding_xid7 = 0;
|
|
grp->outstanding_xid7_p2 = 0;
|
|
grp->saved_xid2 = NULL;
|
|
grp->xidnogood = 0;
|
|
grp->changed_side = 0;
|
|
|
|
grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
|
|
skb_reset_tail_pointer(grp->rcvd_xid_skb);
|
|
grp->rcvd_xid_skb->len = 0;
|
|
grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data;
|
|
memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm,
|
|
TH_HEADER_LENGTH);
|
|
|
|
if (grp->send_qllc_disc == 1) {
|
|
grp->send_qllc_disc = 0;
|
|
rc = mpc_send_qllc_discontact(dev);
|
|
}
|
|
|
|
/* DO NOT issue DEV_EVENT_STOP directly out of this code */
|
|
/* This can result in INOP of VTAM PU due to halting of */
|
|
/* outstanding IO which causes a sense to be returned */
|
|
/* Only about 3 senses are allowed and then IOS/VTAM will*/
|
|
/* become unreachable without manual intervention */
|
|
if ((grp->port_persist == 1) || (grp->alloc_called)) {
|
|
grp->alloc_called = 0;
|
|
fsm_deltimer(&priv->restart_timer);
|
|
fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev);
|
|
fsm_newstate(grp->fsm, MPCG_STATE_RESET);
|
|
if (grp->saved_state > MPCG_STATE_XID7INITF)
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
|
|
"%s(%s): MPC GROUP RECOVERY SCHEDULED",
|
|
CTCM_FUNTAIL, dev->name);
|
|
} else {
|
|
fsm_deltimer(&priv->restart_timer);
|
|
fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev);
|
|
fsm_newstate(grp->fsm, MPCG_STATE_RESET);
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS,
|
|
"%s(%s): NO MPC GROUP RECOVERY ATTEMPTED",
|
|
CTCM_FUNTAIL, dev->name);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handle mpc group action timeout.
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*
|
|
* fi An instance of an mpc_group fsm.
|
|
* event The event, just happened.
|
|
* arg Generic pointer, casted from net_device * upon call.
|
|
*/
|
|
static void mpc_action_timeout(fsm_instance *fi, int event, void *arg)
|
|
{
|
|
struct net_device *dev = arg;
|
|
struct ctcm_priv *priv;
|
|
struct mpc_group *grp;
|
|
struct channel *wch;
|
|
struct channel *rch;
|
|
|
|
BUG_ON(dev == NULL);
|
|
|
|
priv = dev->ml_priv;
|
|
grp = priv->mpcg;
|
|
wch = priv->channel[WRITE];
|
|
rch = priv->channel[READ];
|
|
|
|
switch (fsm_getstate(grp->fsm)) {
|
|
case MPCG_STATE_XID2INITW:
|
|
/* Unless there is outstanding IO on the */
|
|
/* channel just return and wait for ATTN */
|
|
/* interrupt to begin XID negotiations */
|
|
if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) &&
|
|
(fsm_getstate(wch->fsm) == CH_XID0_PENDING))
|
|
break;
|
|
default:
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
}
|
|
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG,
|
|
"%s: dev=%s exit",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
void mpc_action_discontact(fsm_instance *fi, int event, void *arg)
|
|
{
|
|
struct mpcg_info *mpcginfo = arg;
|
|
struct channel *ch = mpcginfo->ch;
|
|
struct net_device *dev;
|
|
struct ctcm_priv *priv;
|
|
struct mpc_group *grp;
|
|
|
|
if (ch) {
|
|
dev = ch->netdev;
|
|
if (dev) {
|
|
priv = dev->ml_priv;
|
|
if (priv) {
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
|
|
"%s: %s: %s\n",
|
|
CTCM_FUNTAIL, dev->name, ch->id);
|
|
grp = priv->mpcg;
|
|
grp->send_qllc_disc = 1;
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station - not part of FSM
|
|
* CTCM_PROTO_MPC only
|
|
* called from add_channel in ctcm_main.c
|
|
*/
|
|
void mpc_action_send_discontact(unsigned long thischan)
|
|
{
|
|
int rc;
|
|
struct channel *ch = (struct channel *)thischan;
|
|
unsigned long saveflags = 0;
|
|
|
|
spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
|
|
rc = ccw_device_start(ch->cdev, &ch->ccw[15],
|
|
(unsigned long)ch, 0xff, 0);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
|
|
|
|
if (rc != 0) {
|
|
ctcm_ccw_check_rc(ch, rc, (char *)__func__);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* helper function of mpc FSM
|
|
* CTCM_PROTO_MPC only
|
|
* mpc_action_rcvd_xid7
|
|
*/
|
|
static int mpc_validate_xid(struct mpcg_info *mpcginfo)
|
|
{
|
|
struct channel *ch = mpcginfo->ch;
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
struct xid2 *xid = mpcginfo->xid;
|
|
int rc = 0;
|
|
__u64 our_id = 0;
|
|
__u64 their_id = 0;
|
|
int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH;
|
|
|
|
CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid);
|
|
|
|
if (xid == NULL) {
|
|
rc = 1;
|
|
/* XID REJECTED: xid == NULL */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): xid = NULL",
|
|
CTCM_FUNTAIL, ch->id);
|
|
goto done;
|
|
}
|
|
|
|
CTCM_D3_DUMP((char *)xid, XID2_LENGTH);
|
|
|
|
/*the received direction should be the opposite of ours */
|
|
if (((CHANNEL_DIRECTION(ch->flags) == READ) ? XID2_WRITE_SIDE :
|
|
XID2_READ_SIDE) != xid->xid2_dlc_type) {
|
|
rc = 2;
|
|
/* XID REJECTED: r/w channel pairing mismatch */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): r/w channel pairing mismatch",
|
|
CTCM_FUNTAIL, ch->id);
|
|
goto done;
|
|
}
|
|
|
|
if (xid->xid2_dlc_type == XID2_READ_SIDE) {
|
|
CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__,
|
|
grp->group_max_buflen, xid->xid2_buf_len);
|
|
|
|
if (grp->group_max_buflen == 0 || grp->group_max_buflen >
|
|
xid->xid2_buf_len - len)
|
|
grp->group_max_buflen = xid->xid2_buf_len - len;
|
|
}
|
|
|
|
if (grp->saved_xid2 == NULL) {
|
|
grp->saved_xid2 =
|
|
(struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb);
|
|
|
|
memcpy(skb_put(grp->rcvd_xid_skb,
|
|
XID2_LENGTH), xid, XID2_LENGTH);
|
|
grp->rcvd_xid_skb->data = grp->rcvd_xid_data;
|
|
|
|
skb_reset_tail_pointer(grp->rcvd_xid_skb);
|
|
grp->rcvd_xid_skb->len = 0;
|
|
|
|
/* convert two 32 bit numbers into 1 64 bit for id compare */
|
|
our_id = (__u64)priv->xid->xid2_adj_id;
|
|
our_id = our_id << 32;
|
|
our_id = our_id + priv->xid->xid2_sender_id;
|
|
their_id = (__u64)xid->xid2_adj_id;
|
|
their_id = their_id << 32;
|
|
their_id = their_id + xid->xid2_sender_id;
|
|
/* lower id assume the xside role */
|
|
if (our_id < their_id) {
|
|
grp->roll = XSIDE;
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
|
|
"%s(%s): WE HAVE LOW ID - TAKE XSIDE",
|
|
CTCM_FUNTAIL, ch->id);
|
|
} else {
|
|
grp->roll = YSIDE;
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE,
|
|
"%s(%s): WE HAVE HIGH ID - TAKE YSIDE",
|
|
CTCM_FUNTAIL, ch->id);
|
|
}
|
|
|
|
} else {
|
|
if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) {
|
|
rc = 3;
|
|
/* XID REJECTED: xid flag byte4 mismatch */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): xid flag byte4 mismatch",
|
|
CTCM_FUNTAIL, ch->id);
|
|
}
|
|
if (xid->xid2_flag2 == 0x40) {
|
|
rc = 4;
|
|
/* XID REJECTED - xid NOGOOD */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): xid NOGOOD",
|
|
CTCM_FUNTAIL, ch->id);
|
|
}
|
|
if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) {
|
|
rc = 5;
|
|
/* XID REJECTED - Adjacent Station ID Mismatch */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): Adjacent Station ID Mismatch",
|
|
CTCM_FUNTAIL, ch->id);
|
|
}
|
|
if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) {
|
|
rc = 6;
|
|
/* XID REJECTED - Sender Address Mismatch */
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): Sender Address Mismatch",
|
|
CTCM_FUNTAIL, ch->id);
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (rc) {
|
|
ctcm_pr_info("ctcmpc : %s() failed\n", __func__);
|
|
priv->xid->xid2_flag2 = 0x40;
|
|
grp->saved_xid2->xid2_flag2 = 0x40;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side)
|
|
{
|
|
struct channel *ch = arg;
|
|
int rc = 0;
|
|
int gotlock = 0;
|
|
unsigned long saveflags = 0; /* avoids compiler warning with
|
|
spin_unlock_irqrestore */
|
|
|
|
CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
|
|
__func__, smp_processor_id(), ch, ch->id);
|
|
|
|
if (ctcm_checkalloc_buffer(ch))
|
|
goto done;
|
|
|
|
/*
|
|
* skb data-buffer referencing:
|
|
*/
|
|
ch->trans_skb->data = ch->trans_skb_data;
|
|
skb_reset_tail_pointer(ch->trans_skb);
|
|
ch->trans_skb->len = 0;
|
|
/* result of the previous 3 statements is NOT always
|
|
* already set after ctcm_checkalloc_buffer
|
|
* because of possible reuse of the trans_skb
|
|
*/
|
|
memset(ch->trans_skb->data, 0, 16);
|
|
ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
|
|
/* check is main purpose here: */
|
|
skb_put(ch->trans_skb, TH_HEADER_LENGTH);
|
|
ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb);
|
|
/* check is main purpose here: */
|
|
skb_put(ch->trans_skb, XID2_LENGTH);
|
|
ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb);
|
|
/* cleanup back to startpoint */
|
|
ch->trans_skb->data = ch->trans_skb_data;
|
|
skb_reset_tail_pointer(ch->trans_skb);
|
|
ch->trans_skb->len = 0;
|
|
|
|
/* non-checking rewrite of above skb data-buffer referencing: */
|
|
/*
|
|
memset(ch->trans_skb->data, 0, 16);
|
|
ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data;
|
|
ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH);
|
|
ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH;
|
|
*/
|
|
|
|
ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[8].count = 0;
|
|
ch->ccw[8].cda = 0x00;
|
|
|
|
if (!(ch->xid_th && ch->xid && ch->xid_id))
|
|
CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO,
|
|
"%s(%s): xid_th=%p, xid=%p, xid_id=%p",
|
|
CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id);
|
|
|
|
if (side == XSIDE) {
|
|
/* mpc_action_xside_xid */
|
|
if (ch->xid_th == NULL)
|
|
goto done;
|
|
ch->ccw[9].cmd_code = CCW_CMD_WRITE;
|
|
ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[9].count = TH_HEADER_LENGTH;
|
|
ch->ccw[9].cda = virt_to_phys(ch->xid_th);
|
|
|
|
if (ch->xid == NULL)
|
|
goto done;
|
|
ch->ccw[10].cmd_code = CCW_CMD_WRITE;
|
|
ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[10].count = XID2_LENGTH;
|
|
ch->ccw[10].cda = virt_to_phys(ch->xid);
|
|
|
|
ch->ccw[11].cmd_code = CCW_CMD_READ;
|
|
ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[11].count = TH_HEADER_LENGTH;
|
|
ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th);
|
|
|
|
ch->ccw[12].cmd_code = CCW_CMD_READ;
|
|
ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[12].count = XID2_LENGTH;
|
|
ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid);
|
|
|
|
ch->ccw[13].cmd_code = CCW_CMD_READ;
|
|
ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id);
|
|
|
|
} else { /* side == YSIDE : mpc_action_yside_xid */
|
|
ch->ccw[9].cmd_code = CCW_CMD_READ;
|
|
ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[9].count = TH_HEADER_LENGTH;
|
|
ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th);
|
|
|
|
ch->ccw[10].cmd_code = CCW_CMD_READ;
|
|
ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[10].count = XID2_LENGTH;
|
|
ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid);
|
|
|
|
if (ch->xid_th == NULL)
|
|
goto done;
|
|
ch->ccw[11].cmd_code = CCW_CMD_WRITE;
|
|
ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[11].count = TH_HEADER_LENGTH;
|
|
ch->ccw[11].cda = virt_to_phys(ch->xid_th);
|
|
|
|
if (ch->xid == NULL)
|
|
goto done;
|
|
ch->ccw[12].cmd_code = CCW_CMD_WRITE;
|
|
ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[12].count = XID2_LENGTH;
|
|
ch->ccw[12].cda = virt_to_phys(ch->xid);
|
|
|
|
if (ch->xid_id == NULL)
|
|
goto done;
|
|
ch->ccw[13].cmd_code = CCW_CMD_WRITE;
|
|
ch->ccw[13].cda = virt_to_phys(ch->xid_id);
|
|
|
|
}
|
|
ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC;
|
|
ch->ccw[13].count = 4;
|
|
|
|
ch->ccw[14].cmd_code = CCW_CMD_NOOP;
|
|
ch->ccw[14].flags = CCW_FLAG_SLI;
|
|
ch->ccw[14].count = 0;
|
|
ch->ccw[14].cda = 0;
|
|
|
|
CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7);
|
|
CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH);
|
|
CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH);
|
|
CTCM_D3_DUMP((char *)ch->xid_id, 4);
|
|
|
|
if (!in_irq()) {
|
|
/* Such conditional locking is a known problem for
|
|
* sparse because its static undeterministic.
|
|
* Warnings should be ignored here. */
|
|
spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
|
|
gotlock = 1;
|
|
}
|
|
|
|
fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch);
|
|
rc = ccw_device_start(ch->cdev, &ch->ccw[8],
|
|
(unsigned long)ch, 0xff, 0);
|
|
|
|
if (gotlock) /* see remark above about conditional locking */
|
|
spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);
|
|
|
|
if (rc != 0) {
|
|
ctcm_ccw_check_rc(ch, rc,
|
|
(side == XSIDE) ? "x-side XID" : "y-side XID");
|
|
}
|
|
|
|
done:
|
|
CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n",
|
|
__func__, ch, ch->id);
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
mpc_action_side_xid(fsm, arg, XSIDE);
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
mpc_action_side_xid(fsm, arg, YSIDE);
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
struct channel *ch = arg;
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
|
|
__func__, smp_processor_id(), ch, ch->id);
|
|
|
|
if (ch->xid == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): ch->xid == NULL",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return;
|
|
}
|
|
|
|
fsm_newstate(ch->fsm, CH_XID0_INPROGRESS);
|
|
|
|
ch->xid->xid2_option = XID2_0;
|
|
|
|
switch (fsm_getstate(grp->fsm)) {
|
|
case MPCG_STATE_XID2INITW:
|
|
case MPCG_STATE_XID2INITX:
|
|
ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
|
|
break;
|
|
case MPCG_STATE_XID0IOWAIT:
|
|
case MPCG_STATE_XID0IOWAIX:
|
|
ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
|
|
break;
|
|
}
|
|
|
|
fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
struct net_device *dev = arg;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = NULL;
|
|
int direction;
|
|
int send = 0;
|
|
|
|
if (priv)
|
|
grp = priv->mpcg;
|
|
if (grp == NULL) {
|
|
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
|
|
return;
|
|
}
|
|
|
|
for (direction = READ; direction <= WRITE; direction++) {
|
|
struct channel *ch = priv->channel[direction];
|
|
struct xid2 *thisxid = ch->xid;
|
|
ch->xid_skb->data = ch->xid_skb_data;
|
|
skb_reset_tail_pointer(ch->xid_skb);
|
|
ch->xid_skb->len = 0;
|
|
thisxid->xid2_option = XID2_7;
|
|
send = 0;
|
|
|
|
/* xid7 phase 1 */
|
|
if (grp->outstanding_xid7_p2 > 0) {
|
|
if (grp->roll == YSIDE) {
|
|
if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) {
|
|
fsm_newstate(ch->fsm, CH_XID7_PENDING2);
|
|
ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
|
|
memcpy(skb_put(ch->xid_skb,
|
|
TH_HEADER_LENGTH),
|
|
&thdummy, TH_HEADER_LENGTH);
|
|
send = 1;
|
|
}
|
|
} else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) {
|
|
fsm_newstate(ch->fsm, CH_XID7_PENDING2);
|
|
ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
|
|
memcpy(skb_put(ch->xid_skb,
|
|
TH_HEADER_LENGTH),
|
|
&thnorm, TH_HEADER_LENGTH);
|
|
send = 1;
|
|
}
|
|
} else {
|
|
/* xid7 phase 2 */
|
|
if (grp->roll == YSIDE) {
|
|
if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) {
|
|
fsm_newstate(ch->fsm, CH_XID7_PENDING4);
|
|
memcpy(skb_put(ch->xid_skb,
|
|
TH_HEADER_LENGTH),
|
|
&thnorm, TH_HEADER_LENGTH);
|
|
ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL;
|
|
send = 1;
|
|
}
|
|
} else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) {
|
|
fsm_newstate(ch->fsm, CH_XID7_PENDING4);
|
|
ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD;
|
|
memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH),
|
|
&thdummy, TH_HEADER_LENGTH);
|
|
send = 1;
|
|
}
|
|
}
|
|
|
|
if (send)
|
|
fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
|
|
struct mpcg_info *mpcginfo = arg;
|
|
struct channel *ch = mpcginfo->ch;
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n",
|
|
__func__, ch->id, grp->outstanding_xid2,
|
|
grp->outstanding_xid7, grp->outstanding_xid7_p2);
|
|
|
|
if (fsm_getstate(ch->fsm) < CH_XID7_PENDING)
|
|
fsm_newstate(ch->fsm, CH_XID7_PENDING);
|
|
|
|
grp->outstanding_xid2--;
|
|
grp->outstanding_xid7++;
|
|
grp->outstanding_xid7_p2++;
|
|
|
|
/* must change state before validating xid to */
|
|
/* properly handle interim interrupts received*/
|
|
switch (fsm_getstate(grp->fsm)) {
|
|
case MPCG_STATE_XID2INITW:
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX);
|
|
mpc_validate_xid(mpcginfo);
|
|
break;
|
|
case MPCG_STATE_XID0IOWAIT:
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX);
|
|
mpc_validate_xid(mpcginfo);
|
|
break;
|
|
case MPCG_STATE_XID2INITX:
|
|
if (grp->outstanding_xid2 == 0) {
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW);
|
|
mpc_validate_xid(mpcginfo);
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
|
|
}
|
|
break;
|
|
case MPCG_STATE_XID0IOWAIX:
|
|
if (grp->outstanding_xid2 == 0) {
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI);
|
|
mpc_validate_xid(mpcginfo);
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev);
|
|
}
|
|
break;
|
|
}
|
|
kfree(mpcginfo);
|
|
|
|
CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n",
|
|
__func__, ch->id, grp->outstanding_xid2,
|
|
grp->outstanding_xid7, grp->outstanding_xid7_p2);
|
|
CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n",
|
|
__func__, ch->id,
|
|
fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm));
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg)
|
|
{
|
|
struct mpcg_info *mpcginfo = arg;
|
|
struct channel *ch = mpcginfo->ch;
|
|
struct net_device *dev = ch->netdev;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n",
|
|
__func__, smp_processor_id(), ch, ch->id);
|
|
CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n",
|
|
__func__, grp->outstanding_xid7, grp->outstanding_xid7_p2);
|
|
|
|
grp->outstanding_xid7--;
|
|
ch->xid_skb->data = ch->xid_skb_data;
|
|
skb_reset_tail_pointer(ch->xid_skb);
|
|
ch->xid_skb->len = 0;
|
|
|
|
switch (fsm_getstate(grp->fsm)) {
|
|
case MPCG_STATE_XID7INITI:
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ);
|
|
mpc_validate_xid(mpcginfo);
|
|
break;
|
|
case MPCG_STATE_XID7INITW:
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX);
|
|
mpc_validate_xid(mpcginfo);
|
|
break;
|
|
case MPCG_STATE_XID7INITZ:
|
|
case MPCG_STATE_XID7INITX:
|
|
if (grp->outstanding_xid7 == 0) {
|
|
if (grp->outstanding_xid7_p2 > 0) {
|
|
grp->outstanding_xid7 =
|
|
grp->outstanding_xid7_p2;
|
|
grp->outstanding_xid7_p2 = 0;
|
|
} else
|
|
fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF);
|
|
|
|
mpc_validate_xid(mpcginfo);
|
|
fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev);
|
|
break;
|
|
}
|
|
mpc_validate_xid(mpcginfo);
|
|
break;
|
|
}
|
|
kfree(mpcginfo);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* mpc_action helper of an MPC Group Station FSM action
|
|
* CTCM_PROTO_MPC only
|
|
*/
|
|
static int mpc_send_qllc_discontact(struct net_device *dev)
|
|
{
|
|
__u32 new_len = 0;
|
|
struct sk_buff *skb;
|
|
struct qllc *qllcptr;
|
|
struct ctcm_priv *priv = dev->ml_priv;
|
|
struct mpc_group *grp = priv->mpcg;
|
|
|
|
CTCM_PR_DEBUG("%s: GROUP STATE: %s\n",
|
|
__func__, mpcg_state_names[grp->saved_state]);
|
|
|
|
switch (grp->saved_state) {
|
|
/*
|
|
* establish conn callback function is
|
|
* preferred method to report failure
|
|
*/
|
|
case MPCG_STATE_XID0IOWAIT:
|
|
case MPCG_STATE_XID0IOWAIX:
|
|
case MPCG_STATE_XID7INITI:
|
|
case MPCG_STATE_XID7INITZ:
|
|
case MPCG_STATE_XID2INITW:
|
|
case MPCG_STATE_XID2INITX:
|
|
case MPCG_STATE_XID7INITW:
|
|
case MPCG_STATE_XID7INITX:
|
|
if (grp->estconnfunc) {
|
|
grp->estconnfunc(grp->port_num, -1, 0);
|
|
grp->estconnfunc = NULL;
|
|
break;
|
|
}
|
|
case MPCG_STATE_FLOWC:
|
|
case MPCG_STATE_READY:
|
|
grp->send_qllc_disc = 2;
|
|
new_len = sizeof(struct qllc);
|
|
qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA);
|
|
if (qllcptr == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): qllcptr allocation error",
|
|
CTCM_FUNTAIL, dev->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
qllcptr->qllc_address = 0xcc;
|
|
qllcptr->qllc_commands = 0x03;
|
|
|
|
skb = __dev_alloc_skb(new_len, GFP_ATOMIC);
|
|
|
|
if (skb == NULL) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): skb allocation error",
|
|
CTCM_FUNTAIL, dev->name);
|
|
priv->stats.rx_dropped++;
|
|
kfree(qllcptr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memcpy(skb_put(skb, new_len), qllcptr, new_len);
|
|
kfree(qllcptr);
|
|
|
|
if (skb_headroom(skb) < 4) {
|
|
CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
|
|
"%s(%s): skb_headroom error",
|
|
CTCM_FUNTAIL, dev->name);
|
|
dev_kfree_skb_any(skb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
*((__u32 *)skb_push(skb, 4)) = priv->channel[READ]->pdu_seq;
|
|
priv->channel[READ]->pdu_seq++;
|
|
CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n",
|
|
__func__, priv->channel[READ]->pdu_seq);
|
|
|
|
/* receipt of CC03 resets anticipated sequence number on
|
|
receiving side */
|
|
priv->channel[READ]->pdu_seq = 0x00;
|
|
skb_reset_mac_header(skb);
|
|
skb->dev = dev;
|
|
skb->protocol = htons(ETH_P_SNAP);
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4));
|
|
|
|
netif_rx(skb);
|
|
break;
|
|
default:
|
|
break;
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* --- This is the END my friend --- */
|
|
|