sys/dev/atm/hea/eni_intr.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_intr.c,v 1.4 1999/08/28 00:41:44 peter Exp $
  27  *      @(#) $DragonFly: src/sys/dev/atm/hea/eni_intr.c,v 1.7 2008/03/01 22:03:13 swildner Exp $
  28  */
  29
  30 /*
  31  * Efficient ENI Adapter Support
  32  * -----------------------------
  33  *
  34  * Interrupt processing
  35  *
  36  */
  37
  38 #include <netproto/atm/kern_include.h>
  39
  40 #include "eni_stats.h"
  41 #include "eni.h"
  42 #include "eni_suni.h"
  43 #include "eni_var.h"
  44
  45 static void     eni_suni_intr (Eni_unit *);
  46
  47 /*
  48  * SUNI Interrupt processing
  49  *
  50  * Currently, we don't do anything more then clear the interrupt
  51  * for the SUNI chip.
  52  *
  53  * Arguments:
  54  *      eup             pointer to device unit structure
  55  *
  56  * Returns:
  57  *      none
  58  *
  59  */
  60 static void
  61 eni_suni_intr(Eni_unit *eup)
  62 {
  63         int     SuniInt;
  64         int     val;
  65
  66         SuniInt = eup->eu_suni[SUNI_IS_REG];
  67
  68         /* RSOPI */
  69         if ( SuniInt & SUNI_RSOPI )
  70                 val = eup->eu_suni[SUNI_RSOP_REG];
  71
  72         /* RLOPI */
  73         if ( SuniInt & SUNI_RLOPI )
  74                 val = eup->eu_suni[SUNI_RLOP_REG];
  75
  76         /* RPOPI */
  77         if ( SuniInt & SUNI_RPOPI )
  78                 val = eup->eu_suni[SUNI_RPOP_IS_REG];
  79
  80         /* RACPI */
  81         if ( SuniInt & SUNI_RACPI )
  82                 val = eup->eu_suni[SUNI_RACP_REG];
  83
  84         /* TACPI */
  85         if ( SuniInt & SUNI_TACPI )
  86                 val = eup->eu_suni[SUNI_TACP_REG];
  87
  88         /* TROOLI */
  89         if ( SuniInt & SUNI_TROOLI )
  90                 val = eup->eu_suni[SUNI_CLOCK_REG];
  91
  92         /* LCDI */
  93                 /* Cleared when reading Master Interrupt Status Reg */
  94
  95         /* RDOOLI */
  96         if ( SuniInt & SUNI_RDOOLI )
  97                 val = eup->eu_suni[SUNI_CLOCK_REG];
  98
  99         return;
 100 }
 101
 102 /*
 103  * Device interrupt routine
 104  *
 105  * Service an interrupt from this device
 106  *
 107  * Arguments:
 108  *      eup             pointer to device unit structure
 109  *
 110  * Returns:
 111  *      none
 112  *
 113  */
 114 void
 115 eni_intr(void *arg)
 116 {
 117         Eni_unit        *eup = (Eni_unit *)arg;
 118
 119         /*
 120          * Read and acknowledge any interrupts
 121          */
 122         u_long  mask = eup->eu_midway[MIDWAY_ISA];
 123         /*
 124          * Read the error statistics counter
 125          */
 126         u_long  sval = eup->eu_midway[MIDWAY_STAT];
 127
 128         /*
 129          * Update statistics from adapter
 130          */
 131         eup->eu_trash += ( sval >> 16 );
 132         eup->eu_ovfl += ( sval & 0xffff );
 133
 134         /*
 135          * We handle any DMA completes first so
 136          * that we can free resources for use
 137          * during transmit and especially receive
 138          */
 139         /*
 140          * Handle RX DMA Complete
 141          */
 142         if ( mask & ENI_INT_RX_DMA ) {
 143                 eni_recv_drain ( eup );
 144         }
 145
 146         /*
 147          * Handle TX DMA Complete
 148          */
 149         if ( mask & ENI_INT_TX_DMA ) {
 150                 eni_xmit_drain ( eup );
 151         }
 152
 153         /*
 154          * Look for any PDUs in service list
 155          */
 156         if ( mask & ENI_INT_SERVICE ) {
 157                 eni_do_service ( eup );
 158         }
 159
 160         /*
 161          * Handle miscelaneous interrupts
 162          */
 163         if ( mask & ENI_INT_STAT ) {                    /* STAT_OVFL */
 164                 log ( LOG_INFO, "eni_intr: stat_ovfl: 0x%lx\n", sval );
 165         }
 166         if ( mask & ENI_INT_SUNI ) {                    /* SUNI_INTR */
 167                 eni_suni_intr ( eup );
 168         }
 169         if ( mask & ENI_INT_DMA_ERR ) {                 /* DMA Error */
 170                 log ( LOG_ERR,
 171                         "eni_intr: DMA Error\n" );
 172                 /*
 173                  * We don't know how to recover from DMA errors
 174                  * yet. The adapter has disabled any further
 175                  * processing and we're going to leave it like
 176                  * that.
 177                  */
 178                 return;                                 /* Leave now */
 179         }
 180         if ( mask & ENI_INT_IDEN ) {
 181                 log ( LOG_ERR,
 182                         "eni_intr: TX DMA Ident mismatch\n" );
 183                 /*
 184                  * Something in the TX buffer has really gotten messed
 185                  * up. Since this is most likely a driver bug, and
 186                  * the adapter has shut everything down, leave it
 187                  * like that.
 188                  */
 189                 return;                                 /* Leave now */
 190         }
 191         if ( mask & ENI_INT_DMA_OVFL )
 192                 eup->eu_stats.eni_st_drv.drv_xm_dmaovfl++;
 193         if ( mask & ENI_INT_DMA_LERR ) {
 194                 log ( LOG_ERR,
 195                         "eni_intr: DMA LERR\n" );
 196                 return;
 197         }
 198 }
 199