1 /*
   2  * Copyright (c) 2009-2015 Solarflare Communications Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright notice,
   9  *    this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright notice,
  11  *    this list of conditions and the following disclaimer in the documentation
  12  *    and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  16  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  21  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  23  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  24  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * The views and conclusions contained in the software and documentation are
  27  * those of the authors and should not be interpreted as representing official
  28  * policies, either expressed or implied, of the FreeBSD Project.
  29  */
  30 
  31 #include <sys/types.h>
  32 #include <sys/kmem.h>
  33 #include "sfxge.h"
  34 
  35 
  36 static int
  37 sfxge_vpd_get_keyword(sfxge_t *sp, sfxge_vpd_ioc_t *svip)
  38 {
  39         efx_nic_t *enp = sp->s_enp;
  40         efx_vpd_value_t vpd;
  41         size_t size;
  42         void *buf;
  43         int rc;
  44 
  45         if ((rc = efx_vpd_size(enp, &size)) != 0)
  46                 goto fail1;
  47 
  48         buf = kmem_zalloc(size, KM_SLEEP);
  49         ASSERT(buf);
  50 
  51         if ((rc = efx_vpd_read(enp, buf, size)) != 0)
  52                 goto fail2;
  53 
  54         if ((rc = efx_vpd_verify(enp, buf, size)) != 0)
  55                 goto fail3;
  56 
  57         vpd.evv_tag = svip->svi_tag;
  58         vpd.evv_keyword = svip->svi_keyword;
  59 
  60         if ((rc = efx_vpd_get(enp, buf, size, &vpd)) != 0)
  61                 goto fail4;
  62 
  63         svip->svi_len = vpd.evv_length;
  64         EFX_STATIC_ASSERT(sizeof (svip->svi_payload) == sizeof (vpd.evv_value));
  65         bcopy(&vpd.evv_value[0], svip->svi_payload, sizeof (svip->svi_payload));
  66 
  67         kmem_free(buf, size);
  68 
  69         return (0);
  70 
  71 fail4:
  72         DTRACE_PROBE(fail4);
  73 fail3:
  74         DTRACE_PROBE(fail3);
  75 fail2:
  76         DTRACE_PROBE(fail2);
  77         kmem_free(buf, size);
  78 fail1:
  79         DTRACE_PROBE1(fail1, int, rc);
  80 
  81         return (rc);
  82 }
  83 
  84 
  85 static int
  86 sfxge_vpd_set_keyword(sfxge_t *sp, sfxge_vpd_ioc_t *svip)
  87 {
  88         efx_nic_t *enp = sp->s_enp;
  89         efx_vpd_value_t vpd;
  90         size_t size;
  91         void *buf;
  92         int rc;
  93 
  94         /* restriction on writable tags is in efx_vpd_hunk_set() */
  95 
  96         if ((rc = efx_vpd_size(enp, &size)) != 0)
  97                 goto fail1;
  98 
  99         buf = kmem_zalloc(size, KM_SLEEP);
 100         ASSERT(buf);
 101 
 102         if ((rc = efx_vpd_read(enp, buf, size)) != 0)
 103                 goto fail2;
 104 
 105         if ((rc = efx_vpd_verify(enp, buf, size)) != 0) {
 106                 if ((rc = efx_vpd_reinit(enp, buf, size)) != 0)
 107                         goto fail3;
 108                 if ((rc = efx_vpd_verify(enp, buf, size)) != 0)
 109                         goto fail4;
 110         }
 111 
 112         vpd.evv_tag = svip->svi_tag;
 113         vpd.evv_keyword = svip->svi_keyword;
 114         vpd.evv_length = svip->svi_len;
 115 
 116         EFX_STATIC_ASSERT(sizeof (svip->svi_payload) == sizeof (vpd.evv_value));
 117         bcopy(svip->svi_payload, &vpd.evv_value[0], sizeof (svip->svi_payload));
 118 
 119         if ((rc = efx_vpd_set(enp, buf, size, &vpd)) != 0)
 120                 goto fail5;
 121 
 122         if ((rc = efx_vpd_verify(enp, buf, size)) != 0)
 123                         goto fail6;
 124 
 125         /* And write the VPD back to the hardware */
 126         if ((rc = efx_vpd_write(enp, buf, size)) != 0)
 127                 goto fail7;
 128 
 129         kmem_free(buf, size);
 130 
 131         return (0);
 132 
 133 fail7:
 134         DTRACE_PROBE(fail7);
 135 fail6:
 136         DTRACE_PROBE(fail6);
 137 fail5:
 138         DTRACE_PROBE(fail5);
 139 fail4:
 140         DTRACE_PROBE(fail4);
 141 fail3:
 142         DTRACE_PROBE(fail3);
 143 fail2:
 144         DTRACE_PROBE(fail2);
 145         kmem_free(buf, size);
 146 fail1:
 147         DTRACE_PROBE1(fail1, int, rc);
 148 
 149         return (rc);
 150 }
 151 
 152 
 153 int
 154 sfxge_vpd_ioctl(sfxge_t *sp, sfxge_vpd_ioc_t *svip)
 155 {
 156         int rc;
 157 
 158         switch (svip->svi_op) {
 159         case SFXGE_VPD_OP_GET_KEYWORD:
 160                 if ((rc = sfxge_vpd_get_keyword(sp, svip)) != 0)
 161                         goto fail1;
 162                 break;
 163         case SFXGE_VPD_OP_SET_KEYWORD:
 164                 if ((rc = sfxge_vpd_set_keyword(sp, svip)) != 0)
 165                         goto fail1;
 166                 break;
 167         default:
 168                 rc = EINVAL;
 169                 goto fail2;
 170         }
 171 
 172         return (0);
 173 
 174 fail2:
 175         DTRACE_PROBE(fail2);
 176 fail1:
 177         DTRACE_PROBE1(fail1, int, rc);
 178 
 179         return (rc);
 180 }