ceph/src/seastar/dpdk/drivers/net/sfc/base/ef10_mcdi.c

   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 "efx.h"
  32 #include "efx_impl.h"
  33
  34
  35 #if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD
  36
  37 #if EFSYS_OPT_MCDI
  38
  39 #ifndef WITH_MCDI_V2
  40 #error "WITH_MCDI_V2 required for EF10 MCDIv2 commands."
  41 #endif
  42
  43
  44         __checkReturn   efx_rc_t
  45 ef10_mcdi_init(
  46         __in            efx_nic_t *enp,
  47         __in            const efx_mcdi_transport_t *emtp)
  48 {
  49         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  50         efsys_mem_t *esmp = emtp->emt_dma_mem;
  51         efx_dword_t dword;
  52         efx_rc_t rc;
  53
  54         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
  55                     enp->en_family == EFX_FAMILY_MEDFORD);
  56         EFSYS_ASSERT(enp->en_features & EFX_FEATURE_MCDI_DMA);
  57
  58         /*
  59          * All EF10 firmware supports MCDIv2 and MCDIv1.
  60          * Medford BootROM supports MCDIv2 and MCDIv1.
  61          * Huntington BootROM supports MCDIv1 only.
  62          */
  63         emip->emi_max_version = 2;
  64
  65         /* A host DMA buffer is required for EF10 MCDI */
  66         if (esmp == NULL) {
  67                 rc = EINVAL;
  68                 goto fail1;
  69         }
  70
  71         /*
  72          * Ensure that the MC doorbell is in a known state before issuing MCDI
  73          * commands. The recovery algorithm requires that the MC command buffer
  74          * must be 256 byte aligned. See bug24769.
  75          */
  76         if ((EFSYS_MEM_ADDR(esmp) & 0xFF) != 0) {
  77                 rc = EINVAL;
  78                 goto fail2;
  79         }
  80         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 1);
  81         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
  82
  83         /* Save initial MC reboot status */
  84         (void) ef10_mcdi_poll_reboot(enp);
  85
  86         /* Start a new epoch (allow fresh MCDI requests to succeed) */
  87         efx_mcdi_new_epoch(enp);
  88
  89         return (0);
  90
  91 fail2:
  92         EFSYS_PROBE(fail2);
  93 fail1:
  94         EFSYS_PROBE1(fail1, efx_rc_t, rc);
  95
  96         return (rc);
  97 }
  98
  99                         void
 100 ef10_mcdi_fini(
 101         __in            efx_nic_t *enp)
 102 {
 103         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
 104
 105         emip->emi_new_epoch = B_FALSE;
 106 }
 107
 108 /*
 109  * In older firmware all commands are processed in a single thread, so a long
 110  * running command for one PCIe function can block processing for another
 111  * function (see bug 61269).
 112  *
 113  * In newer firmware that supports multithreaded MCDI processing, we can extend
 114  * the timeout for long-running requests which we know firmware may choose to
 115  * process in a background thread.
 116  */
 117 #define EF10_MCDI_CMD_TIMEOUT_US        (10 * 1000 * 1000)
 118 #define EF10_MCDI_CMD_LONG_TIMEOUT_US   (60 * 1000 * 1000)
 119
 120                         void
 121 ef10_mcdi_get_timeout(
 122         __in            efx_nic_t *enp,
 123         __in            efx_mcdi_req_t *emrp,
 124         __out           uint32_t *timeoutp)
 125 {
 126         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 127
 128         switch (emrp->emr_cmd) {
 129         case MC_CMD_POLL_BIST:
 130         case MC_CMD_NVRAM_ERASE:
 131         case MC_CMD_LICENSING_V3:
 132         case MC_CMD_NVRAM_UPDATE_FINISH:
 133                 if (encp->enc_fw_verified_nvram_update_required != B_FALSE) {
 134                         /*
 135                          * Potentially longer running commands, which firmware
 136                          * may choose to process in a background thread.
 137                          */
 138                         *timeoutp = EF10_MCDI_CMD_LONG_TIMEOUT_US;
 139                         break;
 140                 }
 141                 /* FALLTHRU */
 142         default:
 143                 *timeoutp = EF10_MCDI_CMD_TIMEOUT_US;
 144                 break;
 145         }
 146 }
 147
 148                         void
 149 ef10_mcdi_send_request(
 150         __in                    efx_nic_t *enp,
 151         __in_bcount(hdr_len)    void *hdrp,
 152         __in                    size_t hdr_len,
 153         __in_bcount(sdu_len)    void *sdup,
 154         __in                    size_t sdu_len)
 155 {
 156         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 157         efsys_mem_t *esmp = emtp->emt_dma_mem;
 158         efx_dword_t dword;
 159         unsigned int pos;
 160
 161         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
 162                     enp->en_family == EFX_FAMILY_MEDFORD);
 163
 164         /* Write the header */
 165         for (pos = 0; pos < hdr_len; pos += sizeof (efx_dword_t)) {
 166                 dword = *(efx_dword_t *)((uint8_t *)hdrp + pos);
 167                 EFSYS_MEM_WRITED(esmp, pos, &dword);
 168         }
 169
 170         /* Write the payload */
 171         for (pos = 0; pos < sdu_len; pos += sizeof (efx_dword_t)) {
 172                 dword = *(efx_dword_t *)((uint8_t *)sdup + pos);
 173                 EFSYS_MEM_WRITED(esmp, hdr_len + pos, &dword);
 174         }
 175
 176         /* Guarantee ordering of memory (MCDI request) and PIO (MC doorbell) */
 177         EFSYS_DMA_SYNC_FOR_DEVICE(esmp, 0, hdr_len + sdu_len);
 178         EFSYS_PIO_WRITE_BARRIER();
 179
 180         /* Ring the doorbell to post the command DMA address to the MC */
 181         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
 182             EFSYS_MEM_ADDR(esmp) >> 32);
 183         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_LWRD_REG, &dword, B_FALSE);
 184
 185         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
 186             EFSYS_MEM_ADDR(esmp) & 0xffffffff);
 187         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
 188 }
 189
 190         __checkReturn   boolean_t
 191 ef10_mcdi_poll_response(
 192         __in            efx_nic_t *enp)
 193 {
 194         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 195         efsys_mem_t *esmp = emtp->emt_dma_mem;
 196         efx_dword_t hdr;
 197
 198         EFSYS_MEM_READD(esmp, 0, &hdr);
 199         EFSYS_MEM_READ_BARRIER();
 200
 201         return (EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE) ? B_TRUE : B_FALSE);
 202 }
 203
 204                         void
 205 ef10_mcdi_read_response(
 206         __in                    efx_nic_t *enp,
 207         __out_bcount(length)    void *bufferp,
 208         __in                    size_t offset,
 209         __in                    size_t length)
 210 {
 211         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 212         efsys_mem_t *esmp = emtp->emt_dma_mem;
 213         unsigned int pos;
 214         efx_dword_t data;
 215
 216         for (pos = 0; pos < length; pos += sizeof (efx_dword_t)) {
 217                 EFSYS_MEM_READD(esmp, offset + pos, &data);
 218                 memcpy((uint8_t *)bufferp + pos, &data,
 219                     MIN(sizeof (data), length - pos));
 220         }
 221 }
 222
 223                         efx_rc_t
 224 ef10_mcdi_poll_reboot(
 225         __in            efx_nic_t *enp)
 226 {
 227         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
 228         efx_dword_t dword;
 229         uint32_t old_status;
 230         uint32_t new_status;
 231         efx_rc_t rc;
 232
 233         old_status = emip->emi_mc_reboot_status;
 234
 235         /* Update MC reboot status word */
 236         EFX_BAR_TBL_READD(enp, ER_DZ_BIU_MC_SFT_STATUS_REG, 0, &dword, B_FALSE);
 237         new_status = dword.ed_u32[0];
 238
 239         /* MC has rebooted if the value has changed */
 240         if (new_status != old_status) {
 241                 emip->emi_mc_reboot_status = new_status;
 242
 243                 /*
 244                  * FIXME: Ignore detected MC REBOOT for now.
 245                  *
 246                  * The Siena support for checking for MC reboot from status
 247                  * flags is broken - see comments in siena_mcdi_poll_reboot().
 248                  * As the generic MCDI code is shared the EF10 reboot
 249                  * detection suffers similar problems.
 250                  *
 251                  * Do not report an error when the boot status changes until
 252                  * this can be handled by common code drivers (and reworked to
 253                  * support Siena too).
 254                  */
 255                 _NOTE(CONSTANTCONDITION)
 256                 if (B_FALSE) {
 257                         rc = EIO;
 258                         goto fail1;
 259                 }
 260         }
 261
 262         return (0);
 263
 264 fail1:
 265         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 266
 267         return (rc);
 268 }
 269
 270         __checkReturn   efx_rc_t
 271 ef10_mcdi_feature_supported(
 272         __in            efx_nic_t *enp,
 273         __in            efx_mcdi_feature_id_t id,
 274         __out           boolean_t *supportedp)
 275 {
 276         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 277         uint32_t privilege_mask = encp->enc_privilege_mask;
 278         efx_rc_t rc;
 279
 280         EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
 281                     enp->en_family == EFX_FAMILY_MEDFORD);
 282
 283         /*
 284          * Use privilege mask state at MCDI attach.
 285          */
 286
 287         switch (id) {
 288         case EFX_MCDI_FEATURE_FW_UPDATE:
 289                 /*
 290                  * Admin privilege must be used prior to introduction of
 291                  * specific flag.
 292                  */
 293                 *supportedp =
 294                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 295                 break;
 296         case EFX_MCDI_FEATURE_LINK_CONTROL:
 297                 /*
 298                  * Admin privilege used prior to introduction of
 299                  * specific flag.
 300                  */
 301                 *supportedp =
 302                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, LINK) ||
 303                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 304                 break;
 305         case EFX_MCDI_FEATURE_MACADDR_CHANGE:
 306                 /*
 307                  * Admin privilege must be used prior to introduction of
 308                  * mac spoofing privilege (at v4.6), which is used up to
 309                  * introduction of change mac spoofing privilege (at v4.7)
 310                  */
 311                 *supportedp =
 312                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, CHANGE_MAC) ||
 313                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
 314                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 315                 break;
 316         case EFX_MCDI_FEATURE_MAC_SPOOFING:
 317                 /*
 318                  * Admin privilege must be used prior to introduction of
 319                  * mac spoofing privilege (at v4.6), which is used up to
 320                  * introduction of mac spoofing TX privilege (at v4.7)
 321                  */
 322                 *supportedp =
 323                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING_TX) ||
 324                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
 325                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 326                 break;
 327         default:
 328                 rc = ENOTSUP;
 329                 goto fail1;
 330         }
 331
 332         return (0);
 333
 334 fail1:
 335         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 336
 337         return (rc);
 338 }
 339
 340 #endif  /* EFSYS_OPT_MCDI */
 341
 342 #endif  /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */