siena_mcdi.c

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    1 /*-
    2  * Copyright (c) 2012-2016 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/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include "efx.h"
   35 #include "efx_impl.h"
   36 
   37 #if EFSYS_OPT_SIENA && EFSYS_OPT_MCDI
   38 
   39 #define SIENA_MCDI_PDU(_emip)                   \
   40         (((emip)->emi_port == 1)                \
   41         ? MC_SMEM_P0_PDU_OFST >> 2              \
   42         : MC_SMEM_P1_PDU_OFST >> 2)
   43 
   44 #define SIENA_MCDI_DOORBELL(_emip)              \
   45         (((emip)->emi_port == 1)                \
   46         ? MC_SMEM_P0_DOORBELL_OFST >> 2         \
   47         : MC_SMEM_P1_DOORBELL_OFST >> 2)
   48 
   49 #define SIENA_MCDI_STATUS(_emip)                \
   50         (((emip)->emi_port == 1)                \
   51         ? MC_SMEM_P0_STATUS_OFST >> 2           \
   52         : MC_SMEM_P1_STATUS_OFST >> 2)
   53 
   54                         void
   55 siena_mcdi_send_request(
   56         __in                    efx_nic_t *enp,
   57         __in_bcount(hdr_len)    void *hdrp,
   58         __in                    size_t hdr_len,
   59         __in_bcount(sdu_len)    void *sdup,
   60         __in                    size_t sdu_len)
   61 {
   62         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
   63         efx_dword_t dword;
   64         unsigned int pdur;
   65         unsigned int dbr;
   66         unsigned int pos;
   67 
   68         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
   69 
   70         EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
   71         pdur = SIENA_MCDI_PDU(emip);
   72         dbr = SIENA_MCDI_DOORBELL(emip);
   73 
   74         /* Write the header */
   75         EFSYS_ASSERT3U(hdr_len, ==, sizeof (efx_dword_t));
   76         dword = *(efx_dword_t *)hdrp;
   77         EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, pdur, &dword, B_TRUE);
   78 
   79         /* Write the payload */
   80         for (pos = 0; pos < sdu_len; pos += sizeof (efx_dword_t)) {
   81                 dword = *(efx_dword_t *)((uint8_t *)sdup + pos);
   82                 EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM,
   83                     pdur + 1 + (pos >> 2), &dword, B_FALSE);
   84         }
   85 
   86         /* Ring the doorbell */
   87         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xd004be11);
   88         EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, dbr, &dword, B_FALSE);
   89 }
   90 
   91                         efx_rc_t
   92 siena_mcdi_poll_reboot(
   93         __in            efx_nic_t *enp)
   94 {
   95 #ifndef EFX_GRACEFUL_MC_REBOOT
   96         /*
   97          * This function is not being used properly.
   98          * Until its callers are fixed, it should always return 0.
   99          */
  100         _NOTE(ARGUNUSED(enp))
  101         return (0);
  102 #else
  103         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  104         unsigned int rebootr;
  105         efx_dword_t dword;
  106         uint32_t value;
  107 
  108         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
  109         EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
  110         rebootr = SIENA_MCDI_STATUS(emip);
  111 
  112         EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE);
  113         value = EFX_DWORD_FIELD(dword, EFX_DWORD_0);
  114 
  115         if (value == 0)
  116                 return (0);
  117 
  118         EFX_ZERO_DWORD(dword);
  119         EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE);
  120 
  121         if (value == MC_STATUS_DWORD_ASSERT)
  122                 return (EINTR);
  123         else
  124                 return (EIO);
  125 #endif
  126 }
  127 
  128 extern  __checkReturn   boolean_t
  129 siena_mcdi_poll_response(
  130         __in            efx_nic_t *enp)
  131 {
  132         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  133         efx_dword_t hdr;
  134         unsigned int pdur;
  135 
  136         EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
  137         pdur = SIENA_MCDI_PDU(emip);
  138 
  139         EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, pdur, &hdr, B_FALSE);
  140         return (EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE) ? B_TRUE : B_FALSE);
  141 }
  142 
  143                         void
  144 siena_mcdi_read_response(
  145         __in                    efx_nic_t *enp,
  146         __out_bcount(length)    void *bufferp,
  147         __in                    size_t offset,
  148         __in                    size_t length)
  149 {
  150         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  151         unsigned int pdur;
  152         unsigned int pos = 0;
  153         efx_dword_t data;
  154         size_t remaining = length;
  155 
  156         EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
  157         pdur = SIENA_MCDI_PDU(emip);
  158 
  159         while (remaining > 0) {
  160                 size_t chunk = MIN(remaining, sizeof (data));
  161 
  162                 EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM,
  163                     pdur + ((offset + pos) >> 2), &data, B_FALSE);
  164                 memcpy((uint8_t *)bufferp + pos, &data, chunk);
  165                 pos += chunk;
  166                 remaining -= chunk;
  167         }
  168 }
  169 
  170         __checkReturn   efx_rc_t
  171 siena_mcdi_init(
  172         __in            efx_nic_t *enp,
  173         __in            const efx_mcdi_transport_t *mtp)
  174 {
  175         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  176         efx_oword_t oword;
  177         unsigned int portnum;
  178         efx_rc_t rc;
  179 
  180         _NOTE(ARGUNUSED(mtp))
  181 
  182         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
  183 
  184         /* Determine the port number to use for MCDI */
  185         EFX_BAR_READO(enp, FR_AZ_CS_DEBUG_REG, &oword);
  186         portnum = EFX_OWORD_FIELD(oword, FRF_CZ_CS_PORT_NUM);
  187 
  188         if (portnum == 0) {
  189                 /* Presumably booted from ROM; only MCDI port 1 will work */
  190                 emip->emi_port = 1;
  191         } else if (portnum <= 2) {
  192                 emip->emi_port = portnum;
  193         } else {
  194                 rc = EINVAL;
  195                 goto fail1;
  196         }
  197 
  198         /* Siena BootROM and firmware only support MCDIv1 */
  199         emip->emi_max_version = 1;
  200 
  201         /*
  202          * Wipe the atomic reboot status so subsequent MCDI requests succeed.
  203          * BOOT_STATUS is preserved so eno_nic_probe() can boot out of the
  204          * assertion handler.
  205          */
  206         (void) siena_mcdi_poll_reboot(enp);
  207 
  208         return (0);
  209 
  210 fail1:
  211         EFSYS_PROBE1(fail1, efx_rc_t, rc);
  212 
  213         return (rc);
  214 }
  215 
  216                         void
  217 siena_mcdi_fini(
  218         __in            efx_nic_t *enp)
  219 {
  220         _NOTE(ARGUNUSED(enp))
  221 }
  222 
  223         __checkReturn   efx_rc_t
  224 siena_mcdi_feature_supported(
  225         __in            efx_nic_t *enp,
  226         __in            efx_mcdi_feature_id_t id,
  227         __out           boolean_t *supportedp)
  228 {
  229         efx_rc_t rc;
  230 
  231         EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA);
  232 
  233         switch (id) {
  234         case EFX_MCDI_FEATURE_FW_UPDATE:
  235         case EFX_MCDI_FEATURE_LINK_CONTROL:
  236         case EFX_MCDI_FEATURE_MACADDR_CHANGE:
  237         case EFX_MCDI_FEATURE_MAC_SPOOFING:
  238                 *supportedp = B_TRUE;
  239                 break;
  240         default:
  241                 rc = ENOTSUP;
  242                 goto fail1;
  243         }
  244 
  245         return (0);
  246 
  247 fail1:
  248         EFSYS_PROBE1(fail1, efx_rc_t, rc);
  249 
  250         return (rc);
  251 }
  252 
  253 /* Default timeout for MCDI command processing. */
  254 #define SIENA_MCDI_CMD_TIMEOUT_US       (10 * 1000 * 1000)
  255 
  256                         void
  257 siena_mcdi_get_timeout(
  258         __in            efx_nic_t *enp,
  259         __in            efx_mcdi_req_t *emrp,
  260         __out           uint32_t *timeoutp)
  261 {
  262         _NOTE(ARGUNUSED(enp, emrp))
  263 
  264         *timeoutp = SIENA_MCDI_CMD_TIMEOUT_US;
  265 }
  266 
  267 #endif  /* EFSYS_OPT_SIENA && EFSYS_OPT_MCDI */

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FreeBSD/Linux Kernel Cross Reference sys/dev/sfxge/common/siena_mcdi.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sfxge/common/siena_mcdi.c