b8b739941e
The driver should not have such a generic global variable name. Reported-by: Zimny Lech <napohybelskurwysynom2010@gmail.com> Cc: Bob Beers <bob.beers@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1982 lines
65 KiB
C
1982 lines
65 KiB
C
/*
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* $Id: musycc.c,v 2.1 2007/08/15 23:32:17 rickd PMCC4_3_1B $
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*/
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unsigned int max_intcnt = 0;
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unsigned int max_bh = 0;
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/*-----------------------------------------------------------------------------
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* musycc.c -
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*
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* Copyright (C) 2007 One Stop Systems, Inc.
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* Copyright (C) 2003-2006 SBE, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* For further information, contact via email: support@onestopsystems.com
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* One Stop Systems, Inc. Escondido, California U.S.A.
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*-----------------------------------------------------------------------------
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* RCS info:
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* RCS revision: $Revision: 2.1 $
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* Last changed on $Date: 2007/08/15 23:32:17 $
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* Changed by $Author: rickd $
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*-----------------------------------------------------------------------------
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* $Log: musycc.c,v $
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* Revision 2.1 2007/08/15 23:32:17 rickd
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* Use 'if 0' instead of GNU comment delimeter to avoid line wrap induced compiler errors.
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*
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* Revision 2.0 2007/08/15 22:13:20 rickd
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* Update to printf pointer %p usage and correct some UINT to ULONG for
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* 64bit comptibility.
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*
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* Revision 1.7 2006/04/21 00:56:40 rickd
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* workqueue files now prefixed with <sbecom> prefix.
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*
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* Revision 1.6 2005/10/27 18:54:19 rickd
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* Clean out old code. Default to HDLC_FCS16, not TRANS.
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*
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* Revision 1.5 2005/10/17 23:55:28 rickd
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* Initial port of NCOMM support patches from original work found
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* in pmc_c4t1e1 as updated by NCOMM. Ref: CONFIG_SBE_PMCC4_NCOMM.
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*
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* Revision 1.4 2005/10/13 20:35:25 rickd
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* Cleanup warning for unused <flags> variable.
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*
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* Revision 1.3 2005/10/13 19:19:22 rickd
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* Disable redundant driver removal cleanup code.
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*
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* Revision 1.2 2005/10/11 18:36:16 rickd
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* Clean up warning messages caused by de-implemented some <flags> associated
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* with spin_lock() removals.
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*
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* Revision 1.1 2005/10/05 00:45:28 rickd
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* Re-enable xmit on flow-controlled and full channel to fix restart hang.
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* Add some temp spin-lock debug code (rld_spin_owner).
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*
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* Revision 1.0 2005/09/28 00:10:06 rickd
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* Initial release for C4T1E1 support. Lots of transparent
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* mode updates.
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*
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*-----------------------------------------------------------------------------
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*/
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char SBEid_pmcc4_musyccc[] =
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"@(#)musycc.c - $Revision: 2.1 $ (c) Copyright 2004-2006 SBE, Inc.";
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/types.h>
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#include "pmcc4_sysdep.h"
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include "sbecom_inline_linux.h"
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#include "libsbew.h"
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#include "pmcc4_private.h"
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#include "pmcc4.h"
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#include "musycc.h"
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#ifdef SBE_INCLUDE_SYMBOLS
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#define STATIC
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#else
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#define STATIC static
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#endif
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#define sd_find_chan(ci,ch) c4_find_chan(ch)
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/*******************************************************************/
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/* global driver variables */
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extern ci_t *c4_list;
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extern int drvr_state;
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extern int cxt1e1_log_level;
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extern int cxt1e1_max_mru;
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extern int cxt1e1_max_mtu;
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extern int max_rxdesc_used;
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extern int max_txdesc_used;
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extern ci_t *CI; /* dummy pointr to board ZEROE's data - DEBUG
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* USAGE */
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/*******************************************************************/
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/* forward references */
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void c4_fifo_free (mpi_t *, int);
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void c4_wk_chan_restart (mch_t *);
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void musycc_bh_tx_eom (mpi_t *, int);
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int musycc_chan_up (ci_t *, int);
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status_t __init musycc_init (ci_t *);
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STATIC void __init musycc_init_port (mpi_t *);
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void musycc_intr_bh_tasklet (ci_t *);
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void musycc_serv_req (mpi_t *, u_int32_t);
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void musycc_update_timeslots (mpi_t *);
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/*******************************************************************/
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#if 1
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STATIC int
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musycc_dump_rxbuffer_ring (mch_t * ch, int lockit)
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{
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struct mdesc *m;
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unsigned long flags = 0;
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u_int32_t status;
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int n;
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if (lockit)
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{
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spin_lock_irqsave (&ch->ch_rxlock, flags);
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}
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if (ch->rxd_num == 0)
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{
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pr_info(" ZERO receive buffers allocated for this channel.");
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} else
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{
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FLUSH_MEM_READ ();
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m = &ch->mdr[ch->rxix_irq_srv];
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for (n = ch->rxd_num; n; n--)
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{
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status = le32_to_cpu (m->status);
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{
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pr_info("%c %08lx[%2d]: sts %08x (%c%c%c%c:%d.) Data [%08x] Next [%08x]\n",
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(m == &ch->mdr[ch->rxix_irq_srv]) ? 'F' : ' ',
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(unsigned long) m, n,
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status,
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m->data ? (status & HOST_RX_OWNED ? 'H' : 'M') : '-',
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status & POLL_DISABLED ? 'P' : '-',
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status & EOBIRQ_ENABLE ? 'b' : '-',
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status & EOMIRQ_ENABLE ? 'm' : '-',
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status & LENGTH_MASK,
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le32_to_cpu (m->data), le32_to_cpu (m->next));
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#ifdef RLD_DUMP_BUFDATA
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{
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u_int32_t *dp;
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int len = status & LENGTH_MASK;
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#if 1
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if (m->data && (status & HOST_RX_OWNED))
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#else
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if (m->data) /* always dump regardless of valid RX
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* data */
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#endif
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{
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dp = (u_int32_t *) OS_phystov ((void *) (le32_to_cpu (m->data)));
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if (len >= 0x10)
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pr_info(" %x[%x]: %08X %08X %08X %08x\n", (u_int32_t) dp, len,
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*dp, *(dp + 1), *(dp + 2), *(dp + 3));
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else if (len >= 0x08)
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pr_info(" %x[%x]: %08X %08X\n", (u_int32_t) dp, len,
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*dp, *(dp + 1));
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else
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pr_info(" %x[%x]: %08X\n", (u_int32_t) dp, len, *dp);
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}
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}
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#endif
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}
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m = m->snext;
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}
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} /* -for- */
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pr_info("\n");
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if (lockit)
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{
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spin_unlock_irqrestore (&ch->ch_rxlock, flags);
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}
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return 0;
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}
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#endif
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#if 1
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STATIC int
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musycc_dump_txbuffer_ring (mch_t * ch, int lockit)
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{
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struct mdesc *m;
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unsigned long flags = 0;
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u_int32_t status;
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int n;
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if (lockit)
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{
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spin_lock_irqsave (&ch->ch_txlock, flags);
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}
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if (ch->txd_num == 0)
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{
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pr_info(" ZERO transmit buffers allocated for this channel.");
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} else
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{
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FLUSH_MEM_READ ();
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m = ch->txd_irq_srv;
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for (n = ch->txd_num; n; n--)
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{
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status = le32_to_cpu (m->status);
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{
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pr_info("%c%c %08lx[%2d]: sts %08x (%c%c%c%c:%d.) Data [%08x] Next [%08x]\n",
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(m == ch->txd_usr_add) ? 'F' : ' ',
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(m == ch->txd_irq_srv) ? 'L' : ' ',
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(unsigned long) m, n,
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status,
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m->data ? (status & MUSYCC_TX_OWNED ? 'M' : 'H') : '-',
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status & POLL_DISABLED ? 'P' : '-',
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status & EOBIRQ_ENABLE ? 'b' : '-',
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status & EOMIRQ_ENABLE ? 'm' : '-',
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status & LENGTH_MASK,
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le32_to_cpu (m->data), le32_to_cpu (m->next));
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#ifdef RLD_DUMP_BUFDATA
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{
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u_int32_t *dp;
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int len = status & LENGTH_MASK;
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if (m->data)
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{
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dp = (u_int32_t *) OS_phystov ((void *) (le32_to_cpu (m->data)));
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if (len >= 0x10)
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pr_info(" %x[%x]: %08X %08X %08X %08x\n", (u_int32_t) dp, len,
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*dp, *(dp + 1), *(dp + 2), *(dp + 3));
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else if (len >= 0x08)
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pr_info(" %x[%x]: %08X %08X\n", (u_int32_t) dp, len,
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*dp, *(dp + 1));
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else
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pr_info(" %x[%x]: %08X\n", (u_int32_t) dp, len, *dp);
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}
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}
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#endif
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}
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m = m->snext;
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}
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} /* -for- */
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pr_info("\n");
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if (lockit)
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{
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spin_unlock_irqrestore (&ch->ch_txlock, flags);
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}
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return 0;
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}
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#endif
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/*
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* The following supports a backdoor debug facility which can be used to
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* display the state of a board's channel.
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*/
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status_t
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musycc_dump_ring (ci_t * ci, unsigned int chan)
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{
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mch_t *ch;
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if (chan >= MAX_CHANS_USED)
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{
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return SBE_DRVR_FAIL; /* E2BIG */
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}
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{
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int bh;
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bh = atomic_read (&ci->bh_pending);
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pr_info(">> bh_pend %d [%d] ihead %d itail %d [%d] th_cnt %d bh_cnt %d wdcnt %d note %d\n",
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bh, max_bh, ci->iqp_headx, ci->iqp_tailx, max_intcnt,
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ci->intlog.drvr_intr_thcount,
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ci->intlog.drvr_intr_bhcount,
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ci->wdcount, ci->wd_notify);
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max_bh = 0; /* reset counter */
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max_intcnt = 0; /* reset counter */
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}
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if (!(ch = sd_find_chan (dummy, chan)))
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{
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pr_info(">> musycc_dump_ring: channel %d not up.\n", chan);
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return ENOENT;
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}
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pr_info(">> CI %p CHANNEL %3d @ %p: state %x status/p %x/%x\n", ci, chan, ch, ch->state,
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ch->status, ch->p.status);
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pr_info("--------------------------------\nTX Buffer Ring - Channel %d, txd_num %d. (bd/ch pend %d %d), TXD required %d, txpkt %lu\n",
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chan, ch->txd_num,
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(u_int32_t) atomic_read (&ci->tx_pending), (u_int32_t) atomic_read (&ch->tx_pending), ch->txd_required, ch->s.tx_packets);
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pr_info("++ User 0x%p IRQ_SRV 0x%p USR_ADD 0x%p QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n",
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ch->user, ch->txd_irq_srv, ch->txd_usr_add,
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sd_queue_stopped (ch->user),
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ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode);
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musycc_dump_txbuffer_ring (ch, 1);
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pr_info("RX Buffer Ring - Channel %d, rxd_num %d. IRQ_SRV[%d] 0x%p, start_rx %x rxpkt %lu\n",
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chan, ch->rxd_num, ch->rxix_irq_srv,
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&ch->mdr[ch->rxix_irq_srv], ch->ch_start_rx, ch->s.rx_packets);
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musycc_dump_rxbuffer_ring (ch, 1);
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return SBE_DRVR_SUCCESS;
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}
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status_t
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musycc_dump_rings (ci_t * ci, unsigned int start_chan)
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{
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unsigned int chan;
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for (chan = start_chan; chan < (start_chan + 5); chan++)
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musycc_dump_ring (ci, chan);
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return SBE_DRVR_SUCCESS;
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}
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/*
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* NOTE on musycc_init_mdt(): These MUSYCC writes are only operational after
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* a MUSYCC GROUP_INIT command has been issued.
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*/
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void
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musycc_init_mdt (mpi_t * pi)
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{
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u_int32_t *addr, cfg;
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int i;
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/*
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* This Idle Code insertion takes effect prior to channel's first
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* transmitted message. After that, each message contains its own Idle
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* Code information which is to be issued after the message is
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* transmitted (Ref.MUSYCC 5.2.2.3: MCENBL bit in Group Configuration
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* Descriptor).
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*/
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addr = (u_int32_t *) ((u_long) pi->reg + MUSYCC_MDT_BASE03_ADDR);
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cfg = CFG_CH_FLAG_7E << IDLE_CODE;
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for (i = 0; i < 32; addr++, i++)
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{
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pci_write_32 (addr, cfg);
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}
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}
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/* Set TX thp to the next unprocessed md */
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void
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musycc_update_tx_thp (mch_t * ch)
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{
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struct mdesc *md;
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unsigned long flags;
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spin_lock_irqsave (&ch->ch_txlock, flags);
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while (1)
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{
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md = ch->txd_irq_srv;
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FLUSH_MEM_READ ();
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if (!md->data)
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{
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/* No MDs with buffers to process */
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spin_unlock_irqrestore (&ch->ch_txlock, flags);
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return;
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}
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if ((le32_to_cpu (md->status)) & MUSYCC_TX_OWNED)
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{
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/* this is the MD to restart TX with */
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break;
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}
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/*
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* Otherwise, we have a valid, host-owned message descriptor which
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* has been successfully transmitted and whose buffer can be freed,
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* so... process this MD, it's owned by the host. (This might give
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* as a new, updated txd_irq_srv.)
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*/
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musycc_bh_tx_eom (ch->up, ch->gchan);
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}
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md = ch->txd_irq_srv;
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ch->up->regram->thp[ch->gchan] = cpu_to_le32 (OS_vtophys (md));
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FLUSH_MEM_WRITE ();
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if (ch->tx_full)
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{
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ch->tx_full = 0;
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ch->txd_required = 0;
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sd_enable_xmit (ch->user); /* re-enable to catch flow controlled
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* channel */
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}
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spin_unlock_irqrestore (&ch->ch_txlock, flags);
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#ifdef RLD_TRANS_DEBUG
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pr_info("++ musycc_update_tx_thp[%d]: setting thp = %p, sts %x\n", ch->channum, md, md->status);
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#endif
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}
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/*
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* This is the workq task executed by the OS when our queue_work() is
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* scheduled and run. It can fire off either RX or TX ACTIVATION depending
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* upon the channel's ch_start_tx and ch_start_rx variables. This routine
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* is implemented as a work queue so that the call to the service request is
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* able to sleep, awaiting an interrupt acknowledgment response (SACK) from
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* the hardware.
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*/
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void
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musycc_wq_chan_restart (void *arg) /* channel private structure */
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{
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mch_t *ch;
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mpi_t *pi;
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struct mdesc *md;
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#if 0
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unsigned long flags;
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#endif
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ch = container_of(arg, struct c4_chan_info, ch_work);
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pi = ch->up;
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#ifdef RLD_TRANS_DEBUG
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pr_info("wq_chan_restart[%d]: start_RT[%d/%d] status %x\n",
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ch->channum, ch->ch_start_rx, ch->ch_start_tx, ch->status);
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#endif
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/**********************************/
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/** check for RX restart request **/
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/**********************************/
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if ((ch->ch_start_rx) && (ch->status & RX_ENABLED))
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{
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ch->ch_start_rx = 0;
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#if defined(RLD_TRANS_DEBUG) || defined(RLD_RXACT_DEBUG)
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{
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static int hereb4 = 7;
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if (hereb4) /* RLD DEBUG */
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{
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hereb4--;
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#ifdef RLD_TRANS_DEBUG
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md = &ch->mdr[ch->rxix_irq_srv];
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pr_info("++ musycc_wq_chan_restart[%d] CHAN RX ACTIVATE: rxix_irq_srv %d, md %p sts %x, rxpkt %lu\n",
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ch->channum, ch->rxix_irq_srv, md, le32_to_cpu (md->status),
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ch->s.rx_packets);
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#elif defined(RLD_RXACT_DEBUG)
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md = &ch->mdr[ch->rxix_irq_srv];
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pr_info("++ musycc_wq_chan_restart[%d] CHAN RX ACTIVATE: rxix_irq_srv %d, md %p sts %x, rxpkt %lu\n",
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ch->channum, ch->rxix_irq_srv, md, le32_to_cpu (md->status),
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ch->s.rx_packets);
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musycc_dump_rxbuffer_ring (ch, 1); /* RLD DEBUG */
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#endif
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}
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}
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#endif
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musycc_serv_req (pi, SR_CHANNEL_ACTIVATE | SR_RX_DIRECTION | ch->gchan);
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}
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/**********************************/
|
|
/** check for TX restart request **/
|
|
/**********************************/
|
|
|
|
if ((ch->ch_start_tx) && (ch->status & TX_ENABLED))
|
|
{
|
|
/* find next unprocessed message, then set TX thp to it */
|
|
musycc_update_tx_thp (ch);
|
|
|
|
#if 0
|
|
spin_lock_irqsave (&ch->ch_txlock, flags);
|
|
#endif
|
|
md = ch->txd_irq_srv;
|
|
if (!md)
|
|
{
|
|
#ifdef RLD_TRANS_DEBUG
|
|
pr_info("-- musycc_wq_chan_restart[%d]: WARNING, starting NULL md\n", ch->channum);
|
|
#endif
|
|
#if 0
|
|
spin_unlock_irqrestore (&ch->ch_txlock, flags);
|
|
#endif
|
|
} else if (md->data && ((le32_to_cpu (md->status)) & MUSYCC_TX_OWNED))
|
|
{
|
|
ch->ch_start_tx = 0;
|
|
#if 0
|
|
spin_unlock_irqrestore (&ch->ch_txlock, flags); /* allow interrupts for service request */
|
|
#endif
|
|
#ifdef RLD_TRANS_DEBUG
|
|
pr_info("++ musycc_wq_chan_restart() CHAN TX ACTIVATE: chan %d txd_irq_srv %p = sts %x, txpkt %lu\n",
|
|
ch->channum, ch->txd_irq_srv, ch->txd_irq_srv->status, ch->s.tx_packets);
|
|
#endif
|
|
musycc_serv_req (pi, SR_CHANNEL_ACTIVATE | SR_TX_DIRECTION | ch->gchan);
|
|
}
|
|
#ifdef RLD_RESTART_DEBUG
|
|
else
|
|
{
|
|
/* retain request to start until retried and we have data to xmit */
|
|
pr_info("-- musycc_wq_chan_restart[%d]: DELAYED due to md %p sts %x data %x, start_tx %x\n",
|
|
ch->channum, md,
|
|
le32_to_cpu (md->status),
|
|
le32_to_cpu (md->data), ch->ch_start_tx);
|
|
musycc_dump_txbuffer_ring (ch, 0);
|
|
#if 0
|
|
spin_unlock_irqrestore (&ch->ch_txlock, flags); /* allow interrupts for service request */
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Channel restart either fires of a workqueue request (2.6) or lodges a
|
|
* watchdog activation sequence (2.4).
|
|
*/
|
|
|
|
void
|
|
musycc_chan_restart (mch_t * ch)
|
|
{
|
|
#ifdef RLD_RESTART_DEBUG
|
|
pr_info("++ musycc_chan_restart[%d]: txd_irq_srv @ %p = sts %x\n",
|
|
ch->channum, ch->txd_irq_srv, ch->txd_irq_srv->status);
|
|
#endif
|
|
|
|
/* 2.6 - find next unprocessed message, then set TX thp to it */
|
|
#ifdef RLD_RESTART_DEBUG
|
|
pr_info(">> musycc_chan_restart: scheduling Chan %x workQ @ %p\n", ch->channum, &ch->ch_work);
|
|
#endif
|
|
c4_wk_chan_restart (ch); /* work queue mechanism fires off: Ref:
|
|
* musycc_wq_chan_restart () */
|
|
|
|
}
|
|
|
|
|
|
void
|
|
rld_put_led (mpi_t * pi, u_int32_t ledval)
|
|
{
|
|
static u_int32_t led = 0;
|
|
|
|
if (ledval == 0)
|
|
led = 0;
|
|
else
|
|
led |= ledval;
|
|
|
|
pci_write_32 ((u_int32_t *) &pi->up->cpldbase->leds, led); /* RLD DEBUG TRANHANG */
|
|
}
|
|
|
|
|
|
#define MUSYCC_SR_RETRY_CNT 9
|
|
|
|
void
|
|
musycc_serv_req (mpi_t * pi, u_int32_t req)
|
|
{
|
|
volatile u_int32_t r;
|
|
int rcnt;
|
|
|
|
/*
|
|
* PORT NOTE: Semaphore protect service loop guarantees only a single
|
|
* operation at a time. Per MUSYCC Manual - "Issuing service requests to
|
|
* the same channel group without first receiving ACK from each request
|
|
* may cause the host to lose track of which service request has been
|
|
* acknowledged."
|
|
*/
|
|
|
|
SD_SEM_TAKE (&pi->sr_sem_busy, "serv"); /* only 1 thru here, per
|
|
* group */
|
|
|
|
if (pi->sr_last == req)
|
|
{
|
|
#ifdef RLD_TRANS_DEBUG
|
|
pr_info(">> same SR, Port %d Req %x\n", pi->portnum, req);
|
|
#endif
|
|
|
|
/*
|
|
* The most likely repeated request is the channel activation command
|
|
* which follows the occurrence of a Transparent mode TX ONR or a
|
|
* BUFF error. If the previous command was a CHANNEL ACTIVATE,
|
|
* precede it with a NOOP command in order maintain coherent control
|
|
* of this current (re)ACTIVATE.
|
|
*/
|
|
|
|
r = (pi->sr_last & ~SR_GCHANNEL_MASK);
|
|
if ((r == (SR_CHANNEL_ACTIVATE | SR_TX_DIRECTION)) ||
|
|
(r == (SR_CHANNEL_ACTIVATE | SR_RX_DIRECTION)))
|
|
{
|
|
#ifdef RLD_TRANS_DEBUG
|
|
pr_info(">> same CHAN ACT SR, Port %d Req %x => issue SR_NOOP CMD\n", pi->portnum, req);
|
|
#endif
|
|
SD_SEM_GIVE (&pi->sr_sem_busy); /* allow this next request */
|
|
musycc_serv_req (pi, SR_NOOP);
|
|
SD_SEM_TAKE (&pi->sr_sem_busy, "serv"); /* relock & continue w/
|
|
* original req */
|
|
} else if (req == SR_NOOP)
|
|
{
|
|
/* no need to issue back-to-back SR_NOOP commands at this time */
|
|
#ifdef RLD_TRANS_DEBUG
|
|
pr_info(">> same Port SR_NOOP skipped, Port %d\n", pi->portnum);
|
|
#endif
|
|
SD_SEM_GIVE (&pi->sr_sem_busy); /* allow this next request */
|
|
return;
|
|
}
|
|
}
|
|
rcnt = 0;
|
|
pi->sr_last = req;
|
|
rewrite:
|
|
pci_write_32 ((u_int32_t *) &pi->reg->srd, req);
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
/*
|
|
* Per MUSYCC Manual, Section 6.1,2 - "When writing an SCR service
|
|
* request, the host must ensure at least one PCI bus clock cycle has
|
|
* elapsed before writing another service request. To meet this minimum
|
|
* elapsed service request write timing interval, it is recommended that
|
|
* the host follow any SCR write with another operation which reads from
|
|
* the same address."
|
|
*/
|
|
r = pci_read_32 ((u_int32_t *) &pi->reg->srd); /* adhere to write
|
|
* timing imposition */
|
|
|
|
|
|
if ((r != req) && (req != SR_CHIP_RESET) && (++rcnt <= MUSYCC_SR_RETRY_CNT))
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
pr_info("%s: %d - reissue srv req/last %x/%x (hdw reads %x), Chan %d.\n",
|
|
pi->up->devname, rcnt, req, pi->sr_last, r,
|
|
(pi->portnum * MUSYCC_NCHANS) + (req & 0x1f));
|
|
OS_uwait_dummy (); /* this delay helps reduce reissue counts
|
|
* (reason not yet researched) */
|
|
goto rewrite;
|
|
}
|
|
if (rcnt > MUSYCC_SR_RETRY_CNT)
|
|
{
|
|
pr_warning("%s: failed service request (#%d)= %x, group %d.\n",
|
|
pi->up->devname, MUSYCC_SR_RETRY_CNT, req, pi->portnum);
|
|
SD_SEM_GIVE (&pi->sr_sem_busy); /* allow any next request */
|
|
return;
|
|
}
|
|
if (req == SR_CHIP_RESET)
|
|
{
|
|
/*
|
|
* PORT NOTE: the CHIP_RESET command is NOT ack'd by the MUSYCC, thus
|
|
* the upcoming delay is used. Though the MUSYCC documentation
|
|
* suggests a read-after-write would supply the required delay, it's
|
|
* unclear what CPU/BUS clock speeds might have been assumed when
|
|
* suggesting this 'lack of ACK' workaround. Thus the use of uwait.
|
|
*/
|
|
OS_uwait (100000, "icard"); /* 100ms */
|
|
} else
|
|
{
|
|
FLUSH_MEM_READ ();
|
|
SD_SEM_TAKE (&pi->sr_sem_wait, "sakack"); /* sleep until SACK
|
|
* interrupt occurs */
|
|
}
|
|
SD_SEM_GIVE (&pi->sr_sem_busy); /* allow any next request */
|
|
}
|
|
|
|
|
|
#ifdef SBE_PMCC4_ENABLE
|
|
void
|
|
musycc_update_timeslots (mpi_t * pi)
|
|
{
|
|
int i, ch;
|
|
char e1mode = IS_FRAME_ANY_E1 (pi->p.port_mode);
|
|
|
|
for (i = 0; i < 32; i++)
|
|
{
|
|
int usedby = 0, last = 0, ts, j, bits[8];
|
|
|
|
u_int8_t lastval = 0;
|
|
|
|
if (((i == 0) && e1mode) || /* disable if E1 mode */
|
|
((i == 16) && ((pi->p.port_mode == CFG_FRAME_E1CRC_CAS) || (pi->p.port_mode == CFG_FRAME_E1CRC_CAS_AMI)))
|
|
|| ((i > 23) && (!e1mode))) /* disable if T1 mode */
|
|
{
|
|
pi->tsm[i] = 0xff; /* make tslot unavailable for this mode */
|
|
} else
|
|
{
|
|
pi->tsm[i] = 0x00; /* make tslot available for assignment */
|
|
}
|
|
for (j = 0; j < 8; j++)
|
|
bits[j] = -1;
|
|
for (ch = 0; ch < MUSYCC_NCHANS; ch++)
|
|
{
|
|
if ((pi->chan[ch]->state == UP) && (pi->chan[ch]->p.bitmask[i]))
|
|
{
|
|
usedby++;
|
|
last = ch;
|
|
lastval = pi->chan[ch]->p.bitmask[i];
|
|
for (j = 0; j < 8; j++)
|
|
if (lastval & (1 << j))
|
|
bits[j] = ch;
|
|
pi->tsm[i] |= lastval;
|
|
}
|
|
}
|
|
if (!usedby)
|
|
ts = 0;
|
|
else if ((usedby == 1) && (lastval == 0xff))
|
|
ts = (4 << 5) | last;
|
|
else if ((usedby == 1) && (lastval == 0x7f))
|
|
ts = (5 << 5) | last;
|
|
else
|
|
{
|
|
int idx;
|
|
|
|
if (bits[0] < 0)
|
|
ts = (6 << 5) | (idx = last);
|
|
else
|
|
ts = (7 << 5) | (idx = bits[0]);
|
|
for (j = 1; j < 8; j++)
|
|
{
|
|
pi->regram->rscm[idx * 8 + j] = (bits[j] < 0) ? 0 : (0x80 | bits[j]);
|
|
pi->regram->tscm[idx * 8 + j] = (bits[j] < 0) ? 0 : (0x80 | bits[j]);
|
|
}
|
|
}
|
|
pi->regram->rtsm[i] = ts;
|
|
pi->regram->ttsm[i] = ts;
|
|
}
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_RX_DIRECTION);
|
|
musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_TX_DIRECTION);
|
|
musycc_serv_req (pi, SR_SUBCHANNEL_MAP | SR_RX_DIRECTION);
|
|
musycc_serv_req (pi, SR_SUBCHANNEL_MAP | SR_TX_DIRECTION);
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
void
|
|
musycc_update_timeslots (mpi_t * pi)
|
|
{
|
|
mch_t *ch;
|
|
|
|
u_int8_t ts, hmask, tsen;
|
|
int gchan;
|
|
int i;
|
|
|
|
#ifdef SBE_PMCC4_ENABLE
|
|
hmask = (0x1f << pi->up->p.hypersize) & 0x1f;
|
|
#endif
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
hmask = (0x1f << hyperdummy) & 0x1f;
|
|
#endif
|
|
for (i = 0; i < 128; i++)
|
|
{
|
|
gchan = ((pi->portnum * MUSYCC_NCHANS) + (i & hmask)) % MUSYCC_NCHANS;
|
|
ch = pi->chan[gchan];
|
|
if (ch->p.mode_56k)
|
|
tsen = MODE_56KBPS;
|
|
else
|
|
tsen = MODE_64KBPS; /* also the default */
|
|
ts = ((pi->portnum % 4) == (i / 32)) ? (tsen << 5) | (i & hmask) : 0;
|
|
pi->regram->rtsm[i] = ts;
|
|
pi->regram->ttsm[i] = ts;
|
|
}
|
|
FLUSH_MEM_WRITE ();
|
|
musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_RX_DIRECTION);
|
|
musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_TX_DIRECTION);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* This routine converts a generic library channel configuration parameter
|
|
* into a hardware specific register value (IE. MUSYCC CCD Register).
|
|
*/
|
|
u_int32_t
|
|
musycc_chan_proto (int proto)
|
|
{
|
|
int reg;
|
|
|
|
switch (proto)
|
|
{
|
|
case CFG_CH_PROTO_TRANS: /* 0 */
|
|
reg = MUSYCC_CCD_TRANS;
|
|
break;
|
|
case CFG_CH_PROTO_SS7: /* 1 */
|
|
reg = MUSYCC_CCD_SS7;
|
|
break;
|
|
default:
|
|
case CFG_CH_PROTO_ISLP_MODE: /* 4 */
|
|
case CFG_CH_PROTO_HDLC_FCS16: /* 2 */
|
|
reg = MUSYCC_CCD_HDLC_FCS16;
|
|
break;
|
|
case CFG_CH_PROTO_HDLC_FCS32: /* 3 */
|
|
reg = MUSYCC_CCD_HDLC_FCS32;
|
|
break;
|
|
}
|
|
|
|
return reg;
|
|
}
|
|
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
STATIC void __init
|
|
musycc_init_port (mpi_t * pi)
|
|
{
|
|
pci_write_32 ((u_int32_t *) &pi->reg->gbp, OS_vtophys (pi->regram));
|
|
|
|
pi->regram->grcd =
|
|
__constant_cpu_to_le32 (MUSYCC_GRCD_RX_ENABLE |
|
|
MUSYCC_GRCD_TX_ENABLE |
|
|
MUSYCC_GRCD_SF_ALIGN |
|
|
MUSYCC_GRCD_SUBCHAN_DISABLE |
|
|
MUSYCC_GRCD_OOFMP_DISABLE |
|
|
MUSYCC_GRCD_COFAIRQ_DISABLE |
|
|
MUSYCC_GRCD_MC_ENABLE |
|
|
(MUSYCC_GRCD_POLLTH_32 << MUSYCC_GRCD_POLLTH_SHIFT));
|
|
|
|
pi->regram->pcd =
|
|
__constant_cpu_to_le32 (MUSYCC_PCD_E1X4_MODE |
|
|
MUSYCC_PCD_TXDATA_RISING |
|
|
MUSYCC_PCD_TX_DRIVEN);
|
|
|
|
/* Message length descriptor */
|
|
pi->regram->mld = __constant_cpu_to_le32 (cxt1e1_max_mru | (cxt1e1_max_mru << 16));
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
musycc_serv_req (pi, SR_GROUP_INIT | SR_RX_DIRECTION);
|
|
musycc_serv_req (pi, SR_GROUP_INIT | SR_TX_DIRECTION);
|
|
|
|
musycc_init_mdt (pi);
|
|
|
|
musycc_update_timeslots (pi);
|
|
}
|
|
#endif
|
|
|
|
|
|
status_t __init
|
|
musycc_init (ci_t * ci)
|
|
{
|
|
char *regaddr; /* temp for address boundary calculations */
|
|
int i, gchan;
|
|
|
|
OS_sem_init (&ci->sem_wdbusy, SEM_AVAILABLE); /* watchdog exclusion */
|
|
|
|
/*
|
|
* Per MUSYCC manual, Section 6.3.4 - "The host must allocate a dword
|
|
* aligned memory segment for interrupt queue pointers."
|
|
*/
|
|
|
|
#define INT_QUEUE_BOUNDARY 4
|
|
|
|
regaddr = OS_kmalloc ((INT_QUEUE_SIZE + 1) * sizeof (u_int32_t));
|
|
if (regaddr == 0)
|
|
return ENOMEM;
|
|
ci->iqd_p_saved = regaddr; /* save orig value for free's usage */
|
|
ci->iqd_p = (u_int32_t *) ((unsigned long) (regaddr + INT_QUEUE_BOUNDARY - 1) &
|
|
(~(INT_QUEUE_BOUNDARY - 1))); /* this calculates
|
|
* closest boundary */
|
|
|
|
for (i = 0; i < INT_QUEUE_SIZE; i++)
|
|
{
|
|
ci->iqd_p[i] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY);
|
|
}
|
|
|
|
for (i = 0; i < ci->max_port; i++)
|
|
{
|
|
mpi_t *pi = &ci->port[i];
|
|
|
|
/*
|
|
* Per MUSYCC manual, Section 6.3.2 - "The host must allocate a 2KB
|
|
* bound memory segment for Channel Group 0."
|
|
*/
|
|
|
|
#define GROUP_BOUNDARY 0x800
|
|
|
|
regaddr = OS_kmalloc (sizeof (struct musycc_groupr) + GROUP_BOUNDARY);
|
|
if (regaddr == 0)
|
|
{
|
|
for (gchan = 0; gchan < i; gchan++)
|
|
{
|
|
pi = &ci->port[gchan];
|
|
OS_kfree (pi->reg);
|
|
pi->reg = 0;
|
|
}
|
|
return ENOMEM;
|
|
}
|
|
pi->regram_saved = regaddr; /* save orig value for free's usage */
|
|
pi->regram = (struct musycc_groupr *) ((unsigned long) (regaddr + GROUP_BOUNDARY - 1) &
|
|
(~(GROUP_BOUNDARY - 1))); /* this calculates
|
|
* closest boundary */
|
|
}
|
|
|
|
/* any board centric MUSYCC commands will use group ZERO as its "home" */
|
|
ci->regram = ci->port[0].regram;
|
|
musycc_serv_req (&ci->port[0], SR_CHIP_RESET);
|
|
|
|
pci_write_32 ((u_int32_t *) &ci->reg->gbp, OS_vtophys (ci->regram));
|
|
pci_flush_write (ci);
|
|
#ifdef CONFIG_SBE_PMCC4_NCOMM
|
|
ci->regram->__glcd = __constant_cpu_to_le32 (GCD_MAGIC);
|
|
#else
|
|
/* standard driver POLLS for INTB via CPLD register */
|
|
ci->regram->__glcd = __constant_cpu_to_le32 (GCD_MAGIC | MUSYCC_GCD_INTB_DISABLE);
|
|
#endif
|
|
|
|
ci->regram->__iqp = cpu_to_le32 (OS_vtophys (&ci->iqd_p[0]));
|
|
ci->regram->__iql = __constant_cpu_to_le32 (INT_QUEUE_SIZE - 1);
|
|
pci_write_32 ((u_int32_t *) &ci->reg->dacbp, 0);
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
ci->state = C_RUNNING; /* mark as full interrupt processing
|
|
* available */
|
|
|
|
musycc_serv_req (&ci->port[0], SR_GLOBAL_INIT); /* FIRST INTERRUPT ! */
|
|
|
|
/* sanity check settable parameters */
|
|
|
|
if (cxt1e1_max_mru > 0xffe)
|
|
{
|
|
pr_warning("Maximum allowed MRU exceeded, resetting %d to %d.\n",
|
|
cxt1e1_max_mru, 0xffe);
|
|
cxt1e1_max_mru = 0xffe;
|
|
}
|
|
if (cxt1e1_max_mtu > 0xffe)
|
|
{
|
|
pr_warning("Maximum allowed MTU exceeded, resetting %d to %d.\n",
|
|
cxt1e1_max_mtu, 0xffe);
|
|
cxt1e1_max_mtu = 0xffe;
|
|
}
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
for (i = 0; i < MUSYCC_NPORTS; i++)
|
|
musycc_init_port (&ci->port[i]);
|
|
#endif
|
|
|
|
return SBE_DRVR_SUCCESS; /* no error */
|
|
}
|
|
|
|
|
|
void
|
|
musycc_bh_tx_eom (mpi_t * pi, int gchan)
|
|
{
|
|
mch_t *ch;
|
|
struct mdesc *md;
|
|
|
|
#if 0
|
|
#ifndef SBE_ISR_INLINE
|
|
unsigned long flags;
|
|
|
|
#endif
|
|
#endif
|
|
volatile u_int32_t status;
|
|
|
|
ch = pi->chan[gchan];
|
|
if (ch == 0 || ch->state != UP)
|
|
{
|
|
if (cxt1e1_log_level >= LOG_ERROR)
|
|
pr_info("%s: intr: xmit EOM on uninitialized channel %d\n",
|
|
pi->up->devname, gchan);
|
|
}
|
|
if (ch == 0 || ch->mdt == 0)
|
|
return; /* note: mdt==0 implies a malloc()
|
|
* failure w/in chan_up() routine */
|
|
|
|
#if 0
|
|
#ifdef SBE_ISR_INLINE
|
|
spin_lock_irq (&ch->ch_txlock);
|
|
#else
|
|
spin_lock_irqsave (&ch->ch_txlock, flags);
|
|
#endif
|
|
#endif
|
|
do
|
|
{
|
|
FLUSH_MEM_READ ();
|
|
md = ch->txd_irq_srv;
|
|
status = le32_to_cpu (md->status);
|
|
|
|
/*
|
|
* Note: Per MUSYCC Ref 6.4.9, the host does not poll a host-owned
|
|
* Transmit Buffer Descriptor during Transparent Mode.
|
|
*/
|
|
if (status & MUSYCC_TX_OWNED)
|
|
{
|
|
int readCount, loopCount;
|
|
|
|
/***********************************************************/
|
|
/* HW Bug Fix */
|
|
/* ---------- */
|
|
/* Under certain PCI Bus loading conditions, the data */
|
|
/* associated with an update of Shared Memory is delayed */
|
|
/* relative to its PCI Interrupt. This is caught when */
|
|
/* the host determines it does not yet OWN the descriptor. */
|
|
/***********************************************************/
|
|
|
|
readCount = 0;
|
|
while (status & MUSYCC_TX_OWNED)
|
|
{
|
|
for (loopCount = 0; loopCount < 0x30; loopCount++)
|
|
OS_uwait_dummy (); /* use call to avoid optimization
|
|
* removal of dummy delay */
|
|
FLUSH_MEM_READ ();
|
|
status = le32_to_cpu (md->status);
|
|
if (readCount++ > 40)
|
|
break; /* don't wait any longer */
|
|
}
|
|
if (status & MUSYCC_TX_OWNED)
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
{
|
|
pr_info("%s: Port %d Chan %2d - unexpected TX msg ownership intr (md %p sts %x)\n",
|
|
pi->up->devname, pi->portnum, ch->channum,
|
|
md, status);
|
|
pr_info("++ User 0x%p IRQ_SRV 0x%p USR_ADD 0x%p QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n",
|
|
ch->user, ch->txd_irq_srv, ch->txd_usr_add,
|
|
sd_queue_stopped (ch->user),
|
|
ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode);
|
|
musycc_dump_txbuffer_ring (ch, 0);
|
|
}
|
|
break; /* Not our mdesc, done */
|
|
} else
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
pr_info("%s: Port %d Chan %2d - recovered TX msg ownership [%d] (md %p sts %x)\n",
|
|
pi->up->devname, pi->portnum, ch->channum, readCount, md, status);
|
|
}
|
|
}
|
|
ch->txd_irq_srv = md->snext;
|
|
|
|
md->data = 0;
|
|
if (md->mem_token != 0)
|
|
{
|
|
/* upcount channel */
|
|
atomic_sub (OS_mem_token_tlen (md->mem_token), &ch->tx_pending);
|
|
/* upcount card */
|
|
atomic_sub (OS_mem_token_tlen (md->mem_token), &pi->up->tx_pending);
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
if (!atomic_read (&pi->up->tx_pending))
|
|
wan256t3_led (pi->up, LED_TX, 0);
|
|
#endif
|
|
|
|
#ifdef CONFIG_SBE_WAN256T3_NCOMM
|
|
/* callback that our packet was sent */
|
|
{
|
|
int hdlcnum = (pi->portnum * 32 + gchan);
|
|
|
|
if (hdlcnum >= 228)
|
|
{
|
|
if (nciProcess_TX_complete)
|
|
(*nciProcess_TX_complete) (hdlcnum,
|
|
getuserbychan (gchan));
|
|
}
|
|
}
|
|
#endif /*** CONFIG_SBE_WAN256T3_NCOMM ***/
|
|
|
|
OS_mem_token_free_irq (md->mem_token);
|
|
md->mem_token = 0;
|
|
}
|
|
md->status = 0;
|
|
#ifdef RLD_TXFULL_DEBUG
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
pr_info("~~ tx_eom: tx_full %x txd_free %d -> %d\n",
|
|
ch->tx_full, ch->txd_free, ch->txd_free + 1);
|
|
#endif
|
|
++ch->txd_free;
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
if ((ch->p.chan_mode != CFG_CH_PROTO_TRANS) && (status & EOBIRQ_ENABLE))
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
pr_info("%s: Mode (%x) incorrect EOB status (%x)\n",
|
|
pi->up->devname, ch->p.chan_mode, status);
|
|
if ((status & EOMIRQ_ENABLE) == 0)
|
|
break;
|
|
}
|
|
}
|
|
while ((ch->p.chan_mode != CFG_CH_PROTO_TRANS) && ((status & EOMIRQ_ENABLE) == 0));
|
|
/*
|
|
* NOTE: (The above 'while' is coupled w/ previous 'do', way above.) Each
|
|
* Transparent data buffer has the EOB bit, and NOT the EOM bit, set and
|
|
* will furthermore have a separate IQD associated with each messages
|
|
* buffer.
|
|
*/
|
|
|
|
FLUSH_MEM_READ ();
|
|
/*
|
|
* Smooth flow control hysterisis by maintaining task stoppage until half
|
|
* the available write buffers are available.
|
|
*/
|
|
if (ch->tx_full && (ch->txd_free >= (ch->txd_num / 2)))
|
|
{
|
|
/*
|
|
* Then, only releave task stoppage if we actually have enough
|
|
* buffers to service the last requested packet. It may require MORE
|
|
* than half the available!
|
|
*/
|
|
if (ch->txd_free >= ch->txd_required)
|
|
{
|
|
|
|
#ifdef RLD_TXFULL_DEBUG
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
pr_info("tx_eom[%d]: enable xmit tx_full no more, txd_free %d txd_num/2 %d\n",
|
|
ch->channum,
|
|
ch->txd_free, ch->txd_num / 2);
|
|
#endif
|
|
ch->tx_full = 0;
|
|
ch->txd_required = 0;
|
|
sd_enable_xmit (ch->user); /* re-enable to catch flow controlled
|
|
* channel */
|
|
}
|
|
}
|
|
#ifdef RLD_TXFULL_DEBUG
|
|
else if (ch->tx_full)
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
pr_info("tx_eom[%d]: bypass TX enable though room available? (txd_free %d txd_num/2 %d)\n",
|
|
ch->channum,
|
|
ch->txd_free, ch->txd_num / 2);
|
|
}
|
|
#endif
|
|
|
|
FLUSH_MEM_WRITE ();
|
|
#if 0
|
|
#ifdef SBE_ISR_INLINE
|
|
spin_unlock_irq (&ch->ch_txlock);
|
|
#else
|
|
spin_unlock_irqrestore (&ch->ch_txlock, flags);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
|
|
STATIC void
|
|
musycc_bh_rx_eom (mpi_t * pi, int gchan)
|
|
{
|
|
mch_t *ch;
|
|
void *m, *m2;
|
|
struct mdesc *md;
|
|
volatile u_int32_t status;
|
|
u_int32_t error;
|
|
|
|
ch = pi->chan[gchan];
|
|
if (ch == 0 || ch->state != UP)
|
|
{
|
|
if (cxt1e1_log_level > LOG_ERROR)
|
|
pr_info("%s: intr: receive EOM on uninitialized channel %d\n",
|
|
pi->up->devname, gchan);
|
|
return;
|
|
}
|
|
if (ch->mdr == 0)
|
|
return; /* can this happen ? */
|
|
|
|
for (;;)
|
|
{
|
|
FLUSH_MEM_READ ();
|
|
md = &ch->mdr[ch->rxix_irq_srv];
|
|
status = le32_to_cpu (md->status);
|
|
if (!(status & HOST_RX_OWNED))
|
|
break; /* Not our mdesc, done */
|
|
m = md->mem_token;
|
|
error = (status >> 16) & 0xf;
|
|
if (error == 0)
|
|
{
|
|
#ifdef CONFIG_SBE_WAN256T3_NCOMM
|
|
int hdlcnum = (pi->portnum * 32 + gchan);
|
|
|
|
/*
|
|
* if the packet number belongs to NCOMM, then send it to the TMS
|
|
* driver
|
|
*/
|
|
if (hdlcnum >= 228)
|
|
{
|
|
if (nciProcess_RX_packet)
|
|
(*nciProcess_RX_packet) (hdlcnum, status & 0x3fff, m, ch->user);
|
|
} else
|
|
#endif /*** CONFIG_SBE_WAN256T3_NCOMM ***/
|
|
|
|
{
|
|
if ((m2 = OS_mem_token_alloc (cxt1e1_max_mru)))
|
|
{
|
|
/* substitute the mbuf+cluster */
|
|
md->mem_token = m2;
|
|
md->data = cpu_to_le32 (OS_vtophys (OS_mem_token_data (m2)));
|
|
|
|
/* pass the received mbuf upward */
|
|
sd_recv_consume (m, status & LENGTH_MASK, ch->user);
|
|
ch->s.rx_packets++;
|
|
ch->s.rx_bytes += status & LENGTH_MASK;
|
|
} else
|
|
{
|
|
ch->s.rx_dropped++;
|
|
}
|
|
}
|
|
} else if (error == ERR_FCS)
|
|
{
|
|
ch->s.rx_crc_errors++;
|
|
} else if (error == ERR_ALIGN)
|
|
{
|
|
ch->s.rx_missed_errors++;
|
|
} else if (error == ERR_ABT)
|
|
{
|
|
ch->s.rx_missed_errors++;
|
|
} else if (error == ERR_LNG)
|
|
{
|
|
ch->s.rx_length_errors++;
|
|
} else if (error == ERR_SHT)
|
|
{
|
|
ch->s.rx_length_errors++;
|
|
}
|
|
FLUSH_MEM_WRITE ();
|
|
status = cxt1e1_max_mru;
|
|
if (ch->p.chan_mode == CFG_CH_PROTO_TRANS)
|
|
status |= EOBIRQ_ENABLE;
|
|
md->status = cpu_to_le32 (status);
|
|
|
|
/* Check next mdesc in the ring */
|
|
if (++ch->rxix_irq_srv >= ch->rxd_num)
|
|
ch->rxix_irq_srv = 0;
|
|
FLUSH_MEM_WRITE ();
|
|
}
|
|
}
|
|
|
|
|
|
irqreturn_t
|
|
musycc_intr_th_handler (void *devp)
|
|
{
|
|
ci_t *ci = (ci_t *) devp;
|
|
volatile u_int32_t status, currInt = 0;
|
|
u_int32_t nextInt, intCnt;
|
|
|
|
/*
|
|
* Hardware not available, potential interrupt hang. But since interrupt
|
|
* might be shared, just return.
|
|
*/
|
|
if (ci->state == C_INIT)
|
|
{
|
|
return IRQ_NONE;
|
|
}
|
|
/*
|
|
* Marked as hardware available. Don't service interrupts, just clear the
|
|
* event.
|
|
*/
|
|
|
|
if (ci->state == C_IDLE)
|
|
{
|
|
status = pci_read_32 ((u_int32_t *) &ci->reg->isd);
|
|
|
|
/* clear the interrupt but process nothing else */
|
|
pci_write_32 ((u_int32_t *) &ci->reg->isd, status);
|
|
return IRQ_HANDLED;
|
|
}
|
|
FLUSH_PCI_READ ();
|
|
FLUSH_MEM_READ ();
|
|
|
|
status = pci_read_32 ((u_int32_t *) &ci->reg->isd);
|
|
nextInt = INTRPTS_NEXTINT (status);
|
|
intCnt = INTRPTS_INTCNT (status);
|
|
ci->intlog.drvr_intr_thcount++;
|
|
|
|
/*********************************************************/
|
|
/* HW Bug Fix */
|
|
/* ---------- */
|
|
/* Under certain PCI Bus loading conditions, the */
|
|
/* MUSYCC looses the data associated with an update */
|
|
/* of its ISD and erroneously returns the immediately */
|
|
/* preceding 'nextInt' value. However, the 'intCnt' */
|
|
/* value appears to be correct. By not starting service */
|
|
/* where the 'missing' 'nextInt' SHOULD point causes */
|
|
/* the IQD not to be serviced - the 'not serviced' */
|
|
/* entries then remain and continue to increase as more */
|
|
/* incorrect ISD's are encountered. */
|
|
/*********************************************************/
|
|
|
|
if (nextInt != INTRPTS_NEXTINT (ci->intlog.this_status_new))
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
{
|
|
pr_info("%s: note - updated ISD from %08x to %08x\n",
|
|
ci->devname, status,
|
|
(status & (~INTRPTS_NEXTINT_M)) | ci->intlog.this_status_new);
|
|
}
|
|
/*
|
|
* Replace bogus status with software corrected value.
|
|
*
|
|
* It's not known whether, during this problem occurrence, if the
|
|
* INTFULL bit is correctly reported or not.
|
|
*/
|
|
status = (status & (~INTRPTS_NEXTINT_M)) | (ci->intlog.this_status_new);
|
|
nextInt = INTRPTS_NEXTINT (status);
|
|
}
|
|
/**********************************************/
|
|
/* Cn847x Bug Fix */
|
|
/* -------------- */
|
|
/* Fix for inability to write back same index */
|
|
/* as read for a full interrupt queue. */
|
|
/**********************************************/
|
|
|
|
if (intCnt == INT_QUEUE_SIZE)
|
|
{
|
|
currInt = ((intCnt - 1) + nextInt) & (INT_QUEUE_SIZE - 1);
|
|
} else
|
|
/************************************************/
|
|
/* Interrupt Write Location Issues */
|
|
/* ------------------------------- */
|
|
/* When the interrupt status descriptor is */
|
|
/* written, the interrupt line is de-asserted */
|
|
/* by the Cn847x. In the case of MIPS */
|
|
/* microprocessors, this must occur at the */
|
|
/* beginning of the interrupt handler so that */
|
|
/* the interrupt handle is not re-entered due */
|
|
/* to interrupt dis-assertion latency. */
|
|
/* In the case of all other processors, this */
|
|
/* action should occur at the end of the */
|
|
/* interrupt handler to avoid overwriting the */
|
|
/* interrupt queue. */
|
|
/************************************************/
|
|
|
|
if (intCnt)
|
|
{
|
|
currInt = (intCnt + nextInt) & (INT_QUEUE_SIZE - 1);
|
|
} else
|
|
{
|
|
/*
|
|
* NOTE: Servicing an interrupt whose ISD contains a count of ZERO
|
|
* can be indicative of a Shared Interrupt chain. Our driver can be
|
|
* called from the system's interrupt handler as a matter of the OS
|
|
* walking the chain. As the chain is walked, the interrupt will
|
|
* eventually be serviced by the correct driver/handler.
|
|
*/
|
|
#if 0
|
|
/* chained interrupt = not ours */
|
|
pr_info(">> %s: intCnt NULL, sts %x, possibly a chained interrupt!\n",
|
|
ci->devname, status);
|
|
#endif
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
ci->iqp_tailx = currInt;
|
|
|
|
currInt <<= INTRPTS_NEXTINT_S;
|
|
ci->intlog.last_status_new = ci->intlog.this_status_new;
|
|
ci->intlog.this_status_new = currInt;
|
|
|
|
if ((cxt1e1_log_level >= LOG_WARN) && (status & INTRPTS_INTFULL_M))
|
|
{
|
|
pr_info("%s: Interrupt queue full condition occurred\n", ci->devname);
|
|
}
|
|
if (cxt1e1_log_level >= LOG_DEBUG)
|
|
pr_info("%s: interrupts pending, isd @ 0x%p: %x curr %d cnt %d NEXT %d\n",
|
|
ci->devname, &ci->reg->isd,
|
|
status, nextInt, intCnt, (intCnt + nextInt) & (INT_QUEUE_SIZE - 1));
|
|
|
|
FLUSH_MEM_WRITE ();
|
|
#if defined(SBE_ISR_TASKLET)
|
|
pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt);
|
|
atomic_inc (&ci->bh_pending);
|
|
tasklet_schedule (&ci->ci_musycc_isr_tasklet);
|
|
#elif defined(SBE_ISR_IMMEDIATE)
|
|
pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt);
|
|
atomic_inc (&ci->bh_pending);
|
|
queue_task (&ci->ci_musycc_isr_tq, &tq_immediate);
|
|
mark_bh (IMMEDIATE_BH);
|
|
#elif defined(SBE_ISR_INLINE)
|
|
(void) musycc_intr_bh_tasklet (ci);
|
|
pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt);
|
|
#endif
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
#if defined(SBE_ISR_IMMEDIATE)
|
|
unsigned long
|
|
#else
|
|
void
|
|
#endif
|
|
musycc_intr_bh_tasklet (ci_t * ci)
|
|
{
|
|
mpi_t *pi;
|
|
mch_t *ch;
|
|
unsigned int intCnt;
|
|
volatile u_int32_t currInt = 0;
|
|
volatile unsigned int headx, tailx;
|
|
int readCount, loopCount;
|
|
int group, gchan, event, err, tx;
|
|
u_int32_t badInt = INT_EMPTY_ENTRY;
|
|
u_int32_t badInt2 = INT_EMPTY_ENTRY2;
|
|
|
|
/*
|
|
* Hardware not available, potential interrupt hang. But since interrupt
|
|
* might be shared, just return.
|
|
*/
|
|
if ((drvr_state != SBE_DRVR_AVAILABLE) || (ci->state == C_INIT))
|
|
{
|
|
#if defined(SBE_ISR_IMMEDIATE)
|
|
return 0L;
|
|
#else
|
|
return;
|
|
#endif
|
|
}
|
|
#if defined(SBE_ISR_TASKLET) || defined(SBE_ISR_IMMEDIATE)
|
|
if (drvr_state != SBE_DRVR_AVAILABLE)
|
|
{
|
|
#if defined(SBE_ISR_TASKLET)
|
|
return;
|
|
#elif defined(SBE_ISR_IMMEDIATE)
|
|
return 0L;
|
|
#endif
|
|
}
|
|
#elif defined(SBE_ISR_INLINE)
|
|
/* no semaphore taken, no double checks */
|
|
#endif
|
|
|
|
ci->intlog.drvr_intr_bhcount++;
|
|
FLUSH_MEM_READ ();
|
|
{
|
|
unsigned int bh = atomic_read (&ci->bh_pending);
|
|
|
|
max_bh = max (bh, max_bh);
|
|
}
|
|
atomic_set (&ci->bh_pending, 0);/* if here, no longer pending */
|
|
while ((headx = ci->iqp_headx) != (tailx = ci->iqp_tailx))
|
|
{
|
|
intCnt = (tailx >= headx) ? (tailx - headx) : (tailx - headx + INT_QUEUE_SIZE);
|
|
currInt = le32_to_cpu (ci->iqd_p[headx]);
|
|
|
|
max_intcnt = max (intCnt, max_intcnt); /* RLD DEBUG */
|
|
|
|
/**************************************************/
|
|
/* HW Bug Fix */
|
|
/* ---------- */
|
|
/* The following code checks for the condition */
|
|
/* of interrupt assertion before interrupt */
|
|
/* queue update. This is a problem on several */
|
|
/* PCI-Local bridge chips found on some products. */
|
|
/**************************************************/
|
|
|
|
readCount = 0;
|
|
if ((currInt == badInt) || (currInt == badInt2))
|
|
ci->intlog.drvr_int_failure++;
|
|
|
|
while ((currInt == badInt) || (currInt == badInt2))
|
|
{
|
|
for (loopCount = 0; loopCount < 0x30; loopCount++)
|
|
OS_uwait_dummy (); /* use call to avoid optimization removal
|
|
* of dummy delay */
|
|
FLUSH_MEM_READ ();
|
|
currInt = le32_to_cpu (ci->iqd_p[headx]);
|
|
if (readCount++ > 20)
|
|
break;
|
|
}
|
|
|
|
if ((currInt == badInt) || (currInt == badInt2)) /* catch failure of Bug
|
|
* Fix checking */
|
|
{
|
|
if (cxt1e1_log_level >= LOG_WARN)
|
|
pr_info("%s: Illegal Interrupt Detected @ 0x%p, mod %d.)\n",
|
|
ci->devname, &ci->iqd_p[headx], headx);
|
|
|
|
/*
|
|
* If the descriptor has not recovered, then leaving the EMPTY
|
|
* entry set will not signal to the MUSYCC that this descriptor
|
|
* has been serviced. The Interrupt Queue can then start loosing
|
|
* available descriptors and MUSYCC eventually encounters and
|
|
* reports the INTFULL condition. Per manual, changing any bit
|
|
* marks descriptor as available, thus the use of different
|
|
* EMPTY_ENTRY values.
|
|
*/
|
|
|
|
if (currInt == badInt)
|
|
{
|
|
ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY2);
|
|
} else
|
|
{
|
|
ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY);
|
|
}
|
|
ci->iqp_headx = (headx + 1) & (INT_QUEUE_SIZE - 1); /* insure wrapness */
|
|
FLUSH_MEM_WRITE ();
|
|
FLUSH_MEM_READ ();
|
|
continue;
|
|
}
|
|
group = INTRPT_GRP (currInt);
|
|
gchan = INTRPT_CH (currInt);
|
|
event = INTRPT_EVENT (currInt);
|
|
err = INTRPT_ERROR (currInt);
|
|
tx = currInt & INTRPT_DIR_M;
|
|
|
|
ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY);
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
if (cxt1e1_log_level >= LOG_DEBUG)
|
|
{
|
|
if (err != 0)
|
|
pr_info(" %08x -> err: %2d,", currInt, err);
|
|
|
|
pr_info("+ interrupt event: %d, grp: %d, chan: %2d, side: %cX\n",
|
|
event, group, gchan, tx ? 'T' : 'R');
|
|
}
|
|
pi = &ci->port[group]; /* notice that here we assume 1-1 group -
|
|
* port mapping */
|
|
ch = pi->chan[gchan];
|
|
switch (event)
|
|
{
|
|
case EVE_SACK: /* Service Request Acknowledge */
|
|
if (cxt1e1_log_level >= LOG_DEBUG)
|
|
{
|
|
volatile u_int32_t r;
|
|
|
|
r = pci_read_32 ((u_int32_t *) &pi->reg->srd);
|
|
pr_info("- SACK cmd: %08x (hdw= %08x)\n", pi->sr_last, r);
|
|
}
|
|
SD_SEM_GIVE (&pi->sr_sem_wait); /* wake up waiting process */
|
|
break;
|
|
case EVE_CHABT: /* Change To Abort Code (0x7e -> 0xff) */
|
|
case EVE_CHIC: /* Change To Idle Code (0xff -> 0x7e) */
|
|
break;
|
|
case EVE_EOM: /* End Of Message */
|
|
case EVE_EOB: /* End Of Buffer (Transparent mode) */
|
|
if (tx)
|
|
{
|
|
musycc_bh_tx_eom (pi, gchan);
|
|
} else
|
|
{
|
|
musycc_bh_rx_eom (pi, gchan);
|
|
}
|
|
#if 0
|
|
break;
|
|
#else
|
|
/*
|
|
* MUSYCC Interrupt Descriptor section states that EOB and EOM
|
|
* can be combined with the NONE error (as well as others). So
|
|
* drop thru to catch this...
|
|
*/
|
|
#endif
|
|
case EVE_NONE:
|
|
if (err == ERR_SHT)
|
|
{
|
|
ch->s.rx_length_errors++;
|
|
}
|
|
break;
|
|
default:
|
|
if (cxt1e1_log_level >= LOG_WARN)
|
|
pr_info("%s: unexpected interrupt event: %d, iqd[%d]: %08x, port: %d\n", ci->devname,
|
|
event, headx, currInt, group);
|
|
break;
|
|
} /* switch on event */
|
|
|
|
|
|
/*
|
|
* Per MUSYCC Manual, Section 6.4.8.3 [Transmit Errors], TX errors
|
|
* are service-affecting and require action to resume normal
|
|
* bit-level processing.
|
|
*/
|
|
|
|
switch (err)
|
|
{
|
|
case ERR_ONR:
|
|
/*
|
|
* Per MUSYCC manual, Section 6.4.8.3 [Transmit Errors], this
|
|
* error requires Transmit channel reactivation.
|
|
*
|
|
* Per MUSYCC manual, Section 6.4.8.4 [Receive Errors], this error
|
|
* requires Receive channel reactivation.
|
|
*/
|
|
if (tx)
|
|
{
|
|
|
|
/*
|
|
* TX ONR Error only occurs when channel is configured for
|
|
* Transparent Mode. However, this code will catch and
|
|
* re-activate on ANY TX ONR error.
|
|
*/
|
|
|
|
/*
|
|
* Set flag to re-enable on any next transmit attempt.
|
|
*/
|
|
ch->ch_start_tx = CH_START_TX_ONR;
|
|
|
|
{
|
|
#ifdef RLD_TRANS_DEBUG
|
|
if (1 || cxt1e1_log_level >= LOG_MONITOR)
|
|
#else
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
#endif
|
|
{
|
|
pr_info("%s: TX buffer underflow [ONR] on channel %d, mode %x QStopped %x free %d\n",
|
|
ci->devname, ch->channum, ch->p.chan_mode, sd_queue_stopped (ch->user), ch->txd_free);
|
|
#ifdef RLD_DEBUG
|
|
if (ch->p.chan_mode == 2) /* problem = ONR on HDLC
|
|
* mode */
|
|
{
|
|
pr_info("++ Failed Last %x Next %x QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n",
|
|
(u_int32_t) ch->txd_irq_srv, (u_int32_t) ch->txd_usr_add,
|
|
sd_queue_stopped (ch->user),
|
|
ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode);
|
|
musycc_dump_txbuffer_ring (ch, 0);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
} else /* RX buffer overrun */
|
|
{
|
|
/*
|
|
* Per MUSYCC manual, Section 6.4.8.4 [Receive Errors],
|
|
* channel recovery for this RX ONR error IS required. It is
|
|
* also suggested to increase the number of receive buffers
|
|
* for this channel. Receive channel reactivation IS
|
|
* required, and data has been lost.
|
|
*/
|
|
ch->s.rx_over_errors++;
|
|
ch->ch_start_rx = CH_START_RX_ONR;
|
|
|
|
if (cxt1e1_log_level >= LOG_WARN)
|
|
{
|
|
pr_info("%s: RX buffer overflow [ONR] on channel %d, mode %x\n",
|
|
ci->devname, ch->channum, ch->p.chan_mode);
|
|
//musycc_dump_rxbuffer_ring (ch, 0); /* RLD DEBUG */
|
|
}
|
|
}
|
|
musycc_chan_restart (ch);
|
|
break;
|
|
case ERR_BUF:
|
|
if (tx)
|
|
{
|
|
ch->s.tx_fifo_errors++;
|
|
ch->ch_start_tx = CH_START_TX_BUF;
|
|
/*
|
|
* Per MUSYCC manual, Section 6.4.8.3 [Transmit Errors],
|
|
* this BUFF error requires Transmit channel reactivation.
|
|
*/
|
|
if (cxt1e1_log_level >= LOG_MONITOR)
|
|
pr_info("%s: TX buffer underrun [BUFF] on channel %d, mode %x\n",
|
|
ci->devname, ch->channum, ch->p.chan_mode);
|
|
} else /* RX buffer overrun */
|
|
{
|
|
ch->s.rx_over_errors++;
|
|
/*
|
|
* Per MUSYCC manual, Section 6.4.8.4 [Receive Errors], HDLC
|
|
* mode requires NO recovery for this RX BUFF error is
|
|
* required. It is suggested to increase the FIFO buffer
|
|
* space for this channel. Receive channel reactivation is
|
|
* not required, but data has been lost.
|
|
*/
|
|
if (cxt1e1_log_level >= LOG_WARN)
|
|
pr_info("%s: RX buffer overrun [BUFF] on channel %d, mode %x\n",
|
|
ci->devname, ch->channum, ch->p.chan_mode);
|
|
/*
|
|
* Per MUSYCC manual, Section 6.4.9.4 [Receive Errors],
|
|
* Transparent mode DOES require recovery for the RX BUFF
|
|
* error. It is suggested to increase the FIFO buffer space
|
|
* for this channel. Receive channel reactivation IS
|
|
* required and data has been lost.
|
|
*/
|
|
if (ch->p.chan_mode == CFG_CH_PROTO_TRANS)
|
|
ch->ch_start_rx = CH_START_RX_BUF;
|
|
}
|
|
|
|
if (tx || (ch->p.chan_mode == CFG_CH_PROTO_TRANS))
|
|
musycc_chan_restart (ch);
|
|
break;
|
|
default:
|
|
break;
|
|
} /* switch on err */
|
|
|
|
/* Check for interrupt lost condition */
|
|
if ((currInt & INTRPT_ILOST_M) && (cxt1e1_log_level >= LOG_ERROR))
|
|
{
|
|
pr_info("%s: Interrupt queue overflow - ILOST asserted\n",
|
|
ci->devname);
|
|
}
|
|
ci->iqp_headx = (headx + 1) & (INT_QUEUE_SIZE - 1); /* insure wrapness */
|
|
FLUSH_MEM_WRITE ();
|
|
FLUSH_MEM_READ ();
|
|
} /* while */
|
|
if ((cxt1e1_log_level >= LOG_MONITOR2) && (ci->iqp_headx != ci->iqp_tailx))
|
|
{
|
|
int bh;
|
|
|
|
bh = atomic_read (&CI->bh_pending);
|
|
pr_info("_bh_: late arrivals, head %d != tail %d, pending %d\n",
|
|
ci->iqp_headx, ci->iqp_tailx, bh);
|
|
}
|
|
#if defined(SBE_ISR_IMMEDIATE)
|
|
return 0L;
|
|
#endif
|
|
/* else, nothing returned */
|
|
}
|
|
|
|
#if 0
|
|
int __init
|
|
musycc_new_chan (ci_t * ci, int channum, void *user)
|
|
{
|
|
mch_t *ch;
|
|
|
|
ch = ci->port[channum / MUSYCC_NCHANS].chan[channum % MUSYCC_NCHANS];
|
|
|
|
if (ch->state != UNASSIGNED)
|
|
return EEXIST;
|
|
/* NOTE: mch_t already cleared during OS_kmalloc() */
|
|
ch->state = DOWN;
|
|
ch->user = user;
|
|
#if 0
|
|
ch->status = 0;
|
|
ch->p.status = 0;
|
|
ch->p.intr_mask = 0;
|
|
#endif
|
|
ch->p.chan_mode = CFG_CH_PROTO_HDLC_FCS16;
|
|
ch->p.idlecode = CFG_CH_FLAG_7E;
|
|
ch->p.pad_fill_count = 2;
|
|
spin_lock_init (&ch->ch_rxlock);
|
|
spin_lock_init (&ch->ch_txlock);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef SBE_PMCC4_ENABLE
|
|
status_t
|
|
musycc_chan_down (ci_t * dummy, int channum)
|
|
{
|
|
mpi_t *pi;
|
|
mch_t *ch;
|
|
int i, gchan;
|
|
|
|
if (!(ch = sd_find_chan (dummy, channum)))
|
|
return EINVAL;
|
|
pi = ch->up;
|
|
gchan = ch->gchan;
|
|
|
|
/* Deactivate the channel */
|
|
musycc_serv_req (pi, SR_CHANNEL_DEACTIVATE | SR_RX_DIRECTION | gchan);
|
|
ch->ch_start_rx = 0;
|
|
musycc_serv_req (pi, SR_CHANNEL_DEACTIVATE | SR_TX_DIRECTION | gchan);
|
|
ch->ch_start_tx = 0;
|
|
|
|
if (ch->state == DOWN)
|
|
return 0;
|
|
ch->state = DOWN;
|
|
|
|
pi->regram->thp[gchan] = 0;
|
|
pi->regram->tmp[gchan] = 0;
|
|
pi->regram->rhp[gchan] = 0;
|
|
pi->regram->rmp[gchan] = 0;
|
|
FLUSH_MEM_WRITE ();
|
|
for (i = 0; i < ch->txd_num; i++)
|
|
{
|
|
if (ch->mdt[i].mem_token != 0)
|
|
OS_mem_token_free (ch->mdt[i].mem_token);
|
|
}
|
|
|
|
for (i = 0; i < ch->rxd_num; i++)
|
|
{
|
|
if (ch->mdr[i].mem_token != 0)
|
|
OS_mem_token_free (ch->mdr[i].mem_token);
|
|
}
|
|
|
|
OS_kfree (ch->mdr);
|
|
ch->mdr = 0;
|
|
ch->rxd_num = 0;
|
|
OS_kfree (ch->mdt);
|
|
ch->mdt = 0;
|
|
ch->txd_num = 0;
|
|
|
|
musycc_update_timeslots (pi);
|
|
c4_fifo_free (pi, ch->gchan);
|
|
|
|
pi->openchans--;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
int
|
|
musycc_del_chan (ci_t * ci, int channum)
|
|
{
|
|
mch_t *ch;
|
|
|
|
if ((channum < 0) || (channum >= (MUSYCC_NPORTS * MUSYCC_NCHANS))) /* sanity chk param */
|
|
return ECHRNG;
|
|
if (!(ch = sd_find_chan (ci, channum)))
|
|
return ENOENT;
|
|
if (ch->state == UP)
|
|
musycc_chan_down (ci, channum);
|
|
ch->state = UNASSIGNED;
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
musycc_del_chan_stats (ci_t * ci, int channum)
|
|
{
|
|
mch_t *ch;
|
|
|
|
if (channum < 0 || channum >= (MUSYCC_NPORTS * MUSYCC_NCHANS)) /* sanity chk param */
|
|
return ECHRNG;
|
|
if (!(ch = sd_find_chan (ci, channum)))
|
|
return ENOENT;
|
|
|
|
memset (&ch->s, 0, sizeof (struct sbecom_chan_stats));
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
musycc_start_xmit (ci_t * ci, int channum, void *mem_token)
|
|
{
|
|
mch_t *ch;
|
|
struct mdesc *md;
|
|
void *m2;
|
|
#if 0
|
|
unsigned long flags;
|
|
#endif
|
|
int txd_need_cnt;
|
|
u_int32_t len;
|
|
|
|
if (!(ch = sd_find_chan (ci, channum)))
|
|
return ENOENT;
|
|
|
|
if (ci->state != C_RUNNING) /* full interrupt processing available */
|
|
return EINVAL;
|
|
if (ch->state != UP)
|
|
return EINVAL;
|
|
|
|
if (!(ch->status & TX_ENABLED))
|
|
return EROFS; /* how else to flag unwritable state ? */
|
|
|
|
#ifdef RLD_TRANS_DEBUGx
|
|
if (1 || cxt1e1_log_level >= LOG_MONITOR2)
|
|
#else
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
#endif
|
|
{
|
|
pr_info("++ start_xmt[%d]: state %x start %x full %d free %d required %d stopped %x\n",
|
|
channum, ch->state, ch->ch_start_tx, ch->tx_full,
|
|
ch->txd_free, ch->txd_required, sd_queue_stopped (ch->user));
|
|
}
|
|
/***********************************************/
|
|
/** Determine total amount of data to be sent **/
|
|
/***********************************************/
|
|
m2 = mem_token;
|
|
txd_need_cnt = 0;
|
|
for (len = OS_mem_token_tlen (m2); len > 0;
|
|
m2 = (void *) OS_mem_token_next (m2))
|
|
{
|
|
if (!OS_mem_token_len (m2))
|
|
continue;
|
|
txd_need_cnt++;
|
|
len -= OS_mem_token_len (m2);
|
|
}
|
|
|
|
if (txd_need_cnt == 0)
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
pr_info("%s channel %d: no TX data in User buffer\n", ci->devname, channum);
|
|
OS_mem_token_free (mem_token);
|
|
return 0; /* no data to send */
|
|
}
|
|
/*************************************************/
|
|
/** Are there sufficient descriptors available? **/
|
|
/*************************************************/
|
|
if (txd_need_cnt > ch->txd_num) /* never enough descriptors for this
|
|
* large a buffer */
|
|
{
|
|
if (cxt1e1_log_level >= LOG_DEBUG)
|
|
{
|
|
pr_info("start_xmit: discarding buffer, insufficient descriptor cnt %d, need %d.\n",
|
|
ch->txd_num, txd_need_cnt + 1);
|
|
}
|
|
ch->s.tx_dropped++;
|
|
OS_mem_token_free (mem_token);
|
|
return 0;
|
|
}
|
|
#if 0
|
|
spin_lock_irqsave (&ch->ch_txlock, flags);
|
|
#endif
|
|
/************************************************************/
|
|
/** flow control the line if not enough descriptors remain **/
|
|
/************************************************************/
|
|
if (txd_need_cnt > ch->txd_free)
|
|
{
|
|
if (cxt1e1_log_level >= LOG_MONITOR2)
|
|
{
|
|
pr_info("start_xmit[%d]: EBUSY - need more descriptors, have %d of %d need %d\n",
|
|
channum, ch->txd_free, ch->txd_num, txd_need_cnt);
|
|
}
|
|
ch->tx_full = 1;
|
|
ch->txd_required = txd_need_cnt;
|
|
sd_disable_xmit (ch->user);
|
|
#if 0
|
|
spin_unlock_irqrestore (&ch->ch_txlock, flags);
|
|
#endif
|
|
return EBUSY; /* tell user to try again later */
|
|
}
|
|
/**************************************************/
|
|
/** Put the user data into MUSYCC data buffer(s) **/
|
|
/**************************************************/
|
|
m2 = mem_token;
|
|
md = ch->txd_usr_add; /* get current available descriptor */
|
|
|
|
for (len = OS_mem_token_tlen (m2); len > 0; m2 = OS_mem_token_next (m2))
|
|
{
|
|
int u = OS_mem_token_len (m2);
|
|
|
|
if (!u)
|
|
continue;
|
|
len -= u;
|
|
|
|
/*
|
|
* Enable following chunks, yet wait to enable the FIRST chunk until
|
|
* after ALL subsequent chunks are setup.
|
|
*/
|
|
if (md != ch->txd_usr_add) /* not first chunk */
|
|
u |= MUSYCC_TX_OWNED; /* transfer ownership from HOST to MUSYCC */
|
|
|
|
if (len) /* not last chunk */
|
|
u |= EOBIRQ_ENABLE;
|
|
else if (ch->p.chan_mode == CFG_CH_PROTO_TRANS)
|
|
{
|
|
/*
|
|
* Per MUSYCC Ref 6.4.9 for Transparent Mode, the host must
|
|
* always clear EOMIRQ_ENABLE in every Transmit Buffer Descriptor
|
|
* (IE. don't set herein).
|
|
*/
|
|
u |= EOBIRQ_ENABLE;
|
|
} else
|
|
u |= EOMIRQ_ENABLE; /* EOM, last HDLC chunk */
|
|
|
|
|
|
/* last chunk in hdlc mode */
|
|
u |= (ch->p.idlecode << IDLE_CODE);
|
|
if (ch->p.pad_fill_count)
|
|
{
|
|
#if 0
|
|
/* NOOP NOTE: u_int8_t cannot be > 0xFF */
|
|
/* sanitize pad_fill_count for maximums allowed by hardware */
|
|
if (ch->p.pad_fill_count > EXTRA_FLAGS_MASK)
|
|
ch->p.pad_fill_count = EXTRA_FLAGS_MASK;
|
|
#endif
|
|
u |= (PADFILL_ENABLE | (ch->p.pad_fill_count << EXTRA_FLAGS));
|
|
}
|
|
md->mem_token = len ? 0 : mem_token; /* Fill in mds on last
|
|
* segment, others set ZERO
|
|
* so that entire token is
|
|
* removed ONLY when ALL
|
|
* segments have been
|
|
* transmitted. */
|
|
|
|
md->data = cpu_to_le32 (OS_vtophys (OS_mem_token_data (m2)));
|
|
FLUSH_MEM_WRITE ();
|
|
md->status = cpu_to_le32 (u);
|
|
--ch->txd_free;
|
|
md = md->snext;
|
|
}
|
|
FLUSH_MEM_WRITE ();
|
|
|
|
|
|
/*
|
|
* Now transfer ownership of first chunk from HOST to MUSYCC in order to
|
|
* fire-off this XMIT.
|
|
*/
|
|
ch->txd_usr_add->status |= __constant_cpu_to_le32 (MUSYCC_TX_OWNED);
|
|
FLUSH_MEM_WRITE ();
|
|
ch->txd_usr_add = md;
|
|
|
|
len = OS_mem_token_tlen (mem_token);
|
|
atomic_add (len, &ch->tx_pending);
|
|
atomic_add (len, &ci->tx_pending);
|
|
ch->s.tx_packets++;
|
|
ch->s.tx_bytes += len;
|
|
/*
|
|
* If an ONR was seen, then channel requires poking to restart
|
|
* transmission.
|
|
*/
|
|
if (ch->ch_start_tx)
|
|
{
|
|
musycc_chan_restart (ch);
|
|
}
|
|
#ifdef SBE_WAN256T3_ENABLE
|
|
wan256t3_led (ci, LED_TX, LEDV_G);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*** End-of-File ***/
|