sys/dev/atm/hea/eni_init.c

   1 /*
   2  *
   3  * ===================================
   4  * HARP  |  Host ATM Research Platform
   5  * ===================================
   6  *
   7  *
   8  * This Host ATM Research Platform ("HARP") file (the "Software") is
   9  * made available by Network Computing Services, Inc. ("NetworkCS")
  10  * "AS IS".  NetworkCS does not provide maintenance, improvements or
  11  * support of any kind.
  12  *
  13  * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
  14  * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
  15  * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
  16  * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
  17  * In no event shall NetworkCS be responsible for any damages, including
  18  * but not limited to consequential damages, arising from or relating to
  19  * any use of the Software or related support.
  20  *
  21  * Copyright 1994-1998 Network Computing Services, Inc.
  22  *
  23  * Copies of this Software may be made, however, the above copyright
  24  * notice must be reproduced on all copies.
  25  *
  26  *      @(#) $FreeBSD: src/sys/dev/hea/eni_init.c,v 1.3 1999/08/28 00:41:44 peter Exp $
  27  *      @(#) $DragonFly: src/sys/dev/atm/hea/eni_init.c,v 1.5 2008/03/01 22:03:13 swildner Exp $
  28  */
  29
  30 /*
  31  * Efficient ENI Adapter Support
  32  * -----------------------------
  33  *
  34  * Driver initialization support
  35  *
  36  */
  37
  38 #include <netproto/atm/kern_include.h>
  39
  40 #include "eni_stats.h"
  41 #include "eni.h"
  42 #include "eni_var.h"
  43
  44 /*
  45  * Initialize adapter for PDU processing
  46  *
  47  * Enable interrupts, set master control, initialize TX buffer,
  48  * set initial pointers, etc.
  49  *
  50  * Arguments:
  51  *      eup             pointer to device unit structure
  52  *
  53  * Returns:
  54  *      0               successful
  55  *      error           error condition
  56  */
  57 int
  58 eni_init(Eni_unit *eup)
  59 {
  60         u_long  words, order;
  61
  62         /*
  63          * Allocate one large TX buffer. Currently we use only one
  64          * channel with full cell rate which all VCs will use.
  65          * This will (probably) have to change (alot) when we
  66          * implement QoS.
  67          */
  68         /*
  69          * Server cards, which have more then 512KB of RAM, will
  70          * allocate a 128KB TX buffer, while client cards, with
  71          * 512KB or less will allocate a 32KB TX buffer.
  72          */
  73         words = ( eup->eu_ramsize > MAX_CLIENT_RAM * ENI_BUF_PGSZ ?
  74                 TX_LARGE_BSIZE : TX_SMALL_BSIZE ) * ENI_BUF_PGSZ;
  75         if ( ( eup->eu_txbuf = eni_allocate_buffer ( eup, &words ) ) ==
  76             (caddr_t)NULL ) {
  77                 return ENOMEM;
  78         }
  79         eup->eu_txsize = words >> 2;            /* Bytes to words */
  80         words >>= ENI_LOC_PREDIV;               /* Predivide by 256 words */
  81         for ( order = -1; words; order++ )
  82                 words >>= 1;
  83         eup->eu_midway[MIDWAY_TXPLACE] =
  84             (order << TXSIZE_SHIFT) | ((int)eup->eu_txbuf >> ENI_LOC_PREDIV);
  85         eup->eu_txpos = eup->eu_midway[MIDWAY_DESCR] & 0x7FFF;
  86         /*
  87          * Set first word of unack'ed data to start
  88          */
  89         eup->eu_txfirst = eup->eu_txpos;
  90
  91         /*
  92          * Set initial values of local DMA pointer used to prevent wraps
  93          */
  94         eup->eu_txdmawr = 0;
  95         eup->eu_rxdmawr = 0;
  96
  97         /*
  98          * Initialize queue's for receive/transmit pdus
  99          */
 100         eup->eu_txqueue.ifq_maxlen = ENI_IFQ_MAXLEN;
 101         eup->eu_rxqueue.ifq_maxlen = ENI_IFQ_MAXLEN;
 102
 103         /*
 104          * Acknowledge any interrupts
 105          */
 106         (void) eup->eu_midway[MIDWAY_ISA];
 107
 108         /*
 109          * "Zero" Sonet error counters
 110          */
 111         eni_zero_stats ( eup );
 112
 113         /*
 114          * Set master control register
 115          *
 116          * IntSel1 | LOCK_MODE | DMA_ENABLE | TX_ENABLE | RX_ENABLE
 117          *
 118          */
 119         eup->eu_midway[MIDWAY_MASTER] = 1 << ENI_ISEL_SHIFT |
 120             ENI_M_DMAENABLE | ENI_M_TXENABLE | ENI_M_RXENABLE;
 121
 122         /*
 123          * Enable interrupts
 124          */
 125         eup->eu_midway[MIDWAY_IE] = ENI_INT_SERVICE | ENI_INT_RX_DMA |
 126                 ENI_INT_TX_DMA | ENI_INT_DMA_ERR | ENI_INT_DMA_LERR |
 127                         ENI_INT_IDEN | ENI_INT_DMA_OVFL;
 128
 129         /*
 130          * Last thing to do is to indicate that we've finished initializing
 131          * this unit.
 132          */
 133         eup->eu_flags |= CUF_INITED;
 134
 135         return 0;
 136 }
 137