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

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright(c) 2019-2020 Xilinx, Inc.
   4  * Copyright(c) 2012-2019 Solarflare Communications Inc.
   5  */
   6
   7 #include "efx.h"
   8 #include "efx_impl.h"
   9
  10
  11 #if EFX_OPTS_EF10()
  12
  13 #if EFSYS_OPT_MCDI
  14
  15 #ifndef WITH_MCDI_V2
  16 #error "WITH_MCDI_V2 required for EF10 MCDIv2 commands."
  17 #endif
  18
  19
  20         __checkReturn   efx_rc_t
  21 ef10_mcdi_init(
  22         __in            efx_nic_t *enp,
  23         __in            const efx_mcdi_transport_t *emtp)
  24 {
  25         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  26         efsys_mem_t *esmp = emtp->emt_dma_mem;
  27         efx_dword_t dword;
  28         efx_rc_t rc;
  29
  30         EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));
  31         EFSYS_ASSERT(enp->en_features & EFX_FEATURE_MCDI_DMA);
  32
  33         /*
  34          * All EF10 firmware supports MCDIv2 and MCDIv1.
  35          * Medford BootROM supports MCDIv2 and MCDIv1.
  36          * Huntington BootROM supports MCDIv1 only.
  37          */
  38         emip->emi_max_version = 2;
  39
  40         /* A host DMA buffer is required for EF10 MCDI */
  41         if (esmp == NULL) {
  42                 rc = EINVAL;
  43                 goto fail1;
  44         }
  45
  46         /*
  47          * Ensure that the MC doorbell is in a known state before issuing MCDI
  48          * commands. The recovery algorithm requires that the MC command buffer
  49          * must be 256 byte aligned. See bug24769.
  50          */
  51         if ((EFSYS_MEM_ADDR(esmp) & 0xFF) != 0) {
  52                 rc = EINVAL;
  53                 goto fail2;
  54         }
  55         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 1);
  56         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
  57
  58         /* Save initial MC reboot status */
  59         (void) ef10_mcdi_poll_reboot(enp);
  60
  61         /* Start a new epoch (allow fresh MCDI requests to succeed) */
  62         efx_mcdi_new_epoch(enp);
  63
  64         return (0);
  65
  66 fail2:
  67         EFSYS_PROBE(fail2);
  68 fail1:
  69         EFSYS_PROBE1(fail1, efx_rc_t, rc);
  70
  71         return (rc);
  72 }
  73
  74                         void
  75 ef10_mcdi_fini(
  76         __in            efx_nic_t *enp)
  77 {
  78         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
  79
  80         emip->emi_new_epoch = B_FALSE;
  81 }
  82
  83 /*
  84  * In older firmware all commands are processed in a single thread, so a long
  85  * running command for one PCIe function can block processing for another
  86  * function (see bug 61269).
  87  *
  88  * In newer firmware that supports multithreaded MCDI processing, we can extend
  89  * the timeout for long-running requests which we know firmware may choose to
  90  * process in a background thread.
  91  */
  92 #define EF10_MCDI_CMD_TIMEOUT_US        (10 * 1000 * 1000)
  93 #define EF10_MCDI_CMD_LONG_TIMEOUT_US   (60 * 1000 * 1000)
  94
  95                         void
  96 ef10_mcdi_get_timeout(
  97         __in            efx_nic_t *enp,
  98         __in            efx_mcdi_req_t *emrp,
  99         __out           uint32_t *timeoutp)
 100 {
 101         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 102
 103         switch (emrp->emr_cmd) {
 104         case MC_CMD_POLL_BIST:
 105         case MC_CMD_NVRAM_ERASE:
 106         case MC_CMD_LICENSING_V3:
 107         case MC_CMD_NVRAM_UPDATE_FINISH:
 108                 if (encp->enc_nvram_update_verify_result_supported != B_FALSE) {
 109                         /*
 110                          * Potentially longer running commands, which firmware
 111                          * may choose to process in a background thread.
 112                          */
 113                         *timeoutp = EF10_MCDI_CMD_LONG_TIMEOUT_US;
 114                         break;
 115                 }
 116                 /* FALLTHRU */
 117         default:
 118                 *timeoutp = EF10_MCDI_CMD_TIMEOUT_US;
 119                 break;
 120         }
 121 }
 122
 123                         void
 124 ef10_mcdi_send_request(
 125         __in                    efx_nic_t *enp,
 126         __in_bcount(hdr_len)    void *hdrp,
 127         __in                    size_t hdr_len,
 128         __in_bcount(sdu_len)    void *sdup,
 129         __in                    size_t sdu_len)
 130 {
 131         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 132         efsys_mem_t *esmp = emtp->emt_dma_mem;
 133         efx_dword_t dword;
 134         unsigned int pos;
 135
 136         EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));
 137
 138         /* Write the header */
 139         for (pos = 0; pos < hdr_len; pos += sizeof (efx_dword_t)) {
 140                 dword = *(efx_dword_t *)((uint8_t *)hdrp + pos);
 141                 EFSYS_MEM_WRITED(esmp, pos, &dword);
 142         }
 143
 144         /* Write the payload */
 145         for (pos = 0; pos < sdu_len; pos += sizeof (efx_dword_t)) {
 146                 dword = *(efx_dword_t *)((uint8_t *)sdup + pos);
 147                 EFSYS_MEM_WRITED(esmp, hdr_len + pos, &dword);
 148         }
 149
 150         /* Guarantee ordering of memory (MCDI request) and PIO (MC doorbell) */
 151         EFSYS_DMA_SYNC_FOR_DEVICE(esmp, 0, hdr_len + sdu_len);
 152         EFSYS_PIO_WRITE_BARRIER();
 153
 154         /* Ring the doorbell to post the command DMA address to the MC */
 155         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
 156             EFSYS_MEM_ADDR(esmp) >> 32);
 157         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_LWRD_REG, &dword, B_FALSE);
 158
 159         EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
 160             EFSYS_MEM_ADDR(esmp) & 0xffffffff);
 161         EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
 162 }
 163
 164         __checkReturn   boolean_t
 165 ef10_mcdi_poll_response(
 166         __in            efx_nic_t *enp)
 167 {
 168         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 169         efsys_mem_t *esmp = emtp->emt_dma_mem;
 170         efx_dword_t hdr;
 171
 172         EFSYS_MEM_READD(esmp, 0, &hdr);
 173         EFSYS_MEM_READ_BARRIER();
 174
 175         return (EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE) ? B_TRUE : B_FALSE);
 176 }
 177
 178                         void
 179 ef10_mcdi_read_response(
 180         __in                    efx_nic_t *enp,
 181         __out_bcount(length)    void *bufferp,
 182         __in                    size_t offset,
 183         __in                    size_t length)
 184 {
 185         const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
 186         efsys_mem_t *esmp = emtp->emt_dma_mem;
 187         unsigned int pos = 0;
 188         efx_dword_t data;
 189         size_t remaining = length;
 190
 191         while (remaining > 0) {
 192                 size_t chunk = MIN(remaining, sizeof (data));
 193
 194                 EFSYS_MEM_READD(esmp, offset + pos, &data);
 195                 memcpy((uint8_t *)bufferp + pos, &data, chunk);
 196                 pos += chunk;
 197                 remaining -= chunk;
 198         }
 199 }
 200
 201                         efx_rc_t
 202 ef10_mcdi_poll_reboot(
 203         __in            efx_nic_t *enp)
 204 {
 205         efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
 206         efx_dword_t dword;
 207         uint32_t old_status;
 208         uint32_t new_status;
 209         efx_rc_t rc;
 210
 211         old_status = emip->emi_mc_reboot_status;
 212
 213         /* Update MC reboot status word */
 214         EFX_BAR_TBL_READD(enp, ER_DZ_BIU_MC_SFT_STATUS_REG, 0, &dword, B_FALSE);
 215         new_status = dword.ed_u32[0];
 216
 217         /* MC has rebooted if the value has changed */
 218         if (new_status != old_status) {
 219                 emip->emi_mc_reboot_status = new_status;
 220
 221                 /*
 222                  * FIXME: Ignore detected MC REBOOT for now.
 223                  *
 224                  * The Siena support for checking for MC reboot from status
 225                  * flags is broken - see comments in siena_mcdi_poll_reboot().
 226                  * As the generic MCDI code is shared the EF10 reboot
 227                  * detection suffers similar problems.
 228                  *
 229                  * Do not report an error when the boot status changes until
 230                  * this can be handled by common code drivers (and reworked to
 231                  * support Siena too).
 232                  */
 233                 _NOTE(CONSTANTCONDITION)
 234                 if (B_FALSE) {
 235                         rc = EIO;
 236                         goto fail1;
 237                 }
 238         }
 239
 240         return (0);
 241
 242 fail1:
 243         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 244
 245         return (rc);
 246 }
 247
 248         __checkReturn   efx_rc_t
 249 ef10_mcdi_feature_supported(
 250         __in            efx_nic_t *enp,
 251         __in            efx_mcdi_feature_id_t id,
 252         __out           boolean_t *supportedp)
 253 {
 254         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 255         uint32_t privilege_mask = encp->enc_privilege_mask;
 256         efx_rc_t rc;
 257
 258         EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));
 259
 260         /*
 261          * Use privilege mask state at MCDI attach.
 262          */
 263
 264         switch (id) {
 265         case EFX_MCDI_FEATURE_FW_UPDATE:
 266                 /*
 267                  * Admin privilege must be used prior to introduction of
 268                  * specific flag.
 269                  */
 270                 *supportedp =
 271                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 272                 break;
 273         case EFX_MCDI_FEATURE_LINK_CONTROL:
 274                 /*
 275                  * Admin privilege used prior to introduction of
 276                  * specific flag.
 277                  */
 278                 *supportedp =
 279                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, LINK) ||
 280                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 281                 break;
 282         case EFX_MCDI_FEATURE_MACADDR_CHANGE:
 283                 /*
 284                  * Admin privilege must be used prior to introduction of
 285                  * mac spoofing privilege (at v4.6), which is used up to
 286                  * introduction of change mac spoofing privilege (at v4.7)
 287                  */
 288                 *supportedp =
 289                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, CHANGE_MAC) ||
 290                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
 291                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 292                 break;
 293         case EFX_MCDI_FEATURE_MAC_SPOOFING:
 294                 /*
 295                  * Admin privilege must be used prior to introduction of
 296                  * mac spoofing privilege (at v4.6), which is used up to
 297                  * introduction of mac spoofing TX privilege (at v4.7)
 298                  */
 299                 *supportedp =
 300                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING_TX) ||
 301                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
 302                     EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 303                 break;
 304         default:
 305                 rc = ENOTSUP;
 306                 goto fail1;
 307         }
 308
 309         return (0);
 310
 311 fail1:
 312         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 313
 314         return (rc);
 315 }
 316
 317 #endif  /* EFSYS_OPT_MCDI */
 318
 319 #endif  /* EFX_OPTS_EF10() */