diff options
Diffstat (limited to 'sys/dev/sfxge/common/siena_mcdi.c')
-rw-r--r-- | sys/dev/sfxge/common/siena_mcdi.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/sys/dev/sfxge/common/siena_mcdi.c b/sys/dev/sfxge/common/siena_mcdi.c new file mode 100644 index 0000000..b2224ac --- /dev/null +++ b/sys/dev/sfxge/common/siena_mcdi.c @@ -0,0 +1,354 @@ +/*- + * Copyright (c) 2012-2015 Solarflare Communications Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * The views and conclusions contained in the software and documentation are + * those of the authors and should not be interpreted as representing official + * policies, either expressed or implied, of the FreeBSD Project. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "efsys.h" +#include "efx.h" +#include "efx_impl.h" + +#if EFSYS_OPT_SIENA && EFSYS_OPT_MCDI + +#define SIENA_MCDI_PDU(_emip) \ + (((emip)->emi_port == 1) \ + ? MC_SMEM_P0_PDU_OFST >> 2 \ + : MC_SMEM_P1_PDU_OFST >> 2) + +#define SIENA_MCDI_DOORBELL(_emip) \ + (((emip)->emi_port == 1) \ + ? MC_SMEM_P0_DOORBELL_OFST >> 2 \ + : MC_SMEM_P1_DOORBELL_OFST >> 2) + +#define SIENA_MCDI_STATUS(_emip) \ + (((emip)->emi_port == 1) \ + ? MC_SMEM_P0_STATUS_OFST >> 2 \ + : MC_SMEM_P1_STATUS_OFST >> 2) + + + void +siena_mcdi_request_copyin( + __in efx_nic_t *enp, + __in efx_mcdi_req_t *emrp, + __in unsigned int seq, + __in boolean_t ev_cpl, + __in boolean_t new_epoch) +{ + efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip); + efx_dword_t dword; + unsigned int xflags; + unsigned int pdur; + unsigned int dbr; + unsigned int pos; + + EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA); + _NOTE(ARGUNUSED(new_epoch)) + + EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2); + pdur = SIENA_MCDI_PDU(emip); + dbr = SIENA_MCDI_DOORBELL(emip); + + xflags = 0; + if (ev_cpl) + xflags |= MCDI_HEADER_XFLAGS_EVREQ; + + /* Construct the header in shared memory */ + EFX_POPULATE_DWORD_6(dword, + MCDI_HEADER_CODE, emrp->emr_cmd, + MCDI_HEADER_RESYNC, 1, + MCDI_HEADER_DATALEN, emrp->emr_in_length, + MCDI_HEADER_SEQ, seq, + MCDI_HEADER_RESPONSE, 0, + MCDI_HEADER_XFLAGS, xflags); + EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, pdur, &dword, B_TRUE); + + for (pos = 0; pos < emrp->emr_in_length; pos += sizeof (efx_dword_t)) { + memcpy(&dword, MCDI_IN(*emrp, efx_dword_t, pos), + MIN(sizeof (dword), emrp->emr_in_length - pos)); + EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, + pdur + 1 + (pos >> 2), &dword, B_FALSE); + } + + /* Ring the doorbell */ + EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xd004be11); + EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, dbr, &dword, B_FALSE); +} + + void +siena_mcdi_request_copyout( + __in efx_nic_t *enp, + __in efx_mcdi_req_t *emrp) +{ + efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip); + unsigned int pos; + unsigned int pdur; + efx_dword_t data; + + pdur = SIENA_MCDI_PDU(emip); + + /* Copy payload out if caller supplied buffer */ + if (emrp->emr_out_buf != NULL) { + size_t bytes = MIN(emrp->emr_out_length_used, + emrp->emr_out_length); + for (pos = 0; pos < bytes; pos += sizeof (efx_dword_t)) { + EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, + pdur + 1 + (pos >> 2), &data, B_FALSE); + memcpy(MCDI_OUT(*emrp, efx_dword_t, pos), &data, + MIN(sizeof (data), bytes - pos)); + } + } +} + + int +siena_mcdi_poll_reboot( + __in efx_nic_t *enp) +{ +#ifndef EFX_GRACEFUL_MC_REBOOT + /* + * This function is not being used properly. + * Until its callers are fixed, it should always return 0. + */ + _NOTE(ARGUNUSED(enp)) + return (0); +#else + efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip); + unsigned int rebootr; + efx_dword_t dword; + uint32_t value; + + EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA); + EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2); + rebootr = SIENA_MCDI_STATUS(emip); + + EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE); + value = EFX_DWORD_FIELD(dword, EFX_DWORD_0); + + if (value == 0) + return (0); + + EFX_ZERO_DWORD(dword); + EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE); + + if (value == MC_STATUS_DWORD_ASSERT) + return (EINTR); + else + return (EIO); +#endif +} + + __checkReturn boolean_t +siena_mcdi_request_poll( + __in efx_nic_t *enp) +{ + efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip); + efx_mcdi_req_t *emrp; + efx_dword_t dword; + unsigned int pdur; + unsigned int seq; + unsigned int length; + int state; + int rc; + + EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA); + + /* Serialise against post-watchdog efx_mcdi_ev* */ + EFSYS_LOCK(enp->en_eslp, state); + + EFSYS_ASSERT(emip->emi_pending_req != NULL); + EFSYS_ASSERT(!emip->emi_ev_cpl); + emrp = emip->emi_pending_req; + + /* Check for reboot atomically w.r.t efx_mcdi_request_start */ + if (emip->emi_poll_cnt++ == 0) { + if ((rc = siena_mcdi_poll_reboot(enp)) != 0) { + emip->emi_pending_req = NULL; + EFSYS_UNLOCK(enp->en_eslp, state); + + goto fail1; + } + } + + EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2); + pdur = SIENA_MCDI_PDU(emip); + + /* Read the command header */ + EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, pdur, &dword, B_FALSE); + if (EFX_DWORD_FIELD(dword, MCDI_HEADER_RESPONSE) == 0) { + EFSYS_UNLOCK(enp->en_eslp, state); + return (B_FALSE); + } + + /* Request complete */ + emip->emi_pending_req = NULL; + seq = (emip->emi_seq - 1) & EFX_MASK32(MCDI_HEADER_SEQ); + + /* Check for synchronous reboot */ + if (EFX_DWORD_FIELD(dword, MCDI_HEADER_ERROR) != 0 && + EFX_DWORD_FIELD(dword, MCDI_HEADER_DATALEN) == 0) { + /* Consume status word */ + EFSYS_SPIN(EFX_MCDI_STATUS_SLEEP_US); + siena_mcdi_poll_reboot(enp); + EFSYS_UNLOCK(enp->en_eslp, state); + rc = EIO; + goto fail2; + } + + EFSYS_UNLOCK(enp->en_eslp, state); + + /* Check that the returned data is consistent */ + if (EFX_DWORD_FIELD(dword, MCDI_HEADER_CODE) != emrp->emr_cmd || + EFX_DWORD_FIELD(dword, MCDI_HEADER_SEQ) != seq) { + /* Response is for a different request */ + rc = EIO; + goto fail3; + } + + length = EFX_DWORD_FIELD(dword, MCDI_HEADER_DATALEN); + if (EFX_DWORD_FIELD(dword, MCDI_HEADER_ERROR)) { + efx_dword_t errdword; + int errcode; + + EFSYS_ASSERT3U(length, ==, 4); + EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, + pdur + 1 + (MC_CMD_ERR_CODE_OFST >> 2), + &errdword, B_FALSE); + errcode = EFX_DWORD_FIELD(errdword, EFX_DWORD_0); + rc = efx_mcdi_request_errcode(errcode); + if (!emrp->emr_quiet) { + EFSYS_PROBE2(mcdi_err, int, emrp->emr_cmd, + int, errcode); + } + goto fail4; + + } else { + emrp->emr_out_length_used = length; + emrp->emr_rc = 0; + siena_mcdi_request_copyout(enp, emrp); + } + + goto out; + +fail4: + if (!emrp->emr_quiet) + EFSYS_PROBE(fail4); +fail3: + if (!emrp->emr_quiet) + EFSYS_PROBE(fail3); +fail2: + if (!emrp->emr_quiet) + EFSYS_PROBE(fail2); +fail1: + if (!emrp->emr_quiet) + EFSYS_PROBE1(fail1, int, rc); + + /* Fill out error state */ + emrp->emr_rc = rc; + emrp->emr_out_length_used = 0; + + /* Reboot/Assertion */ + if (rc == EIO || rc == EINTR) + efx_mcdi_raise_exception(enp, emrp, rc); + +out: + return (B_TRUE); +} + + __checkReturn int +siena_mcdi_init( + __in efx_nic_t *enp, + __in const efx_mcdi_transport_t *mtp) +{ + efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip); + efx_oword_t oword; + unsigned int portnum; + int rc; + + EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA); + + /* Determine the port number to use for MCDI */ + EFX_BAR_READO(enp, FR_AZ_CS_DEBUG_REG, &oword); + portnum = EFX_OWORD_FIELD(oword, FRF_CZ_CS_PORT_NUM); + + if (portnum == 0) { + /* Presumably booted from ROM; only MCDI port 1 will work */ + emip->emi_port = 1; + } else if (portnum <= 2) { + emip->emi_port = portnum; + } else { + rc = EINVAL; + goto fail1; + } + + /* + * Wipe the atomic reboot status so subsequent MCDI requests succeed. + * BOOT_STATUS is preserved so eno_nic_probe() can boot out of the + * assertion handler. + */ + (void) siena_mcdi_poll_reboot(enp); + + return (0); + +fail1: + EFSYS_PROBE1(fail1, int, rc); + + return (rc); +} + + void +siena_mcdi_fini( + __in efx_nic_t *enp) +{ +} + + __checkReturn int +siena_mcdi_fw_update_supported( + __in efx_nic_t *enp, + __out boolean_t *supportedp) +{ + EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA); + + *supportedp = B_TRUE; + + return (0); +} + + __checkReturn int +siena_mcdi_macaddr_change_supported( + __in efx_nic_t *enp, + __out boolean_t *supportedp) +{ + EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA); + + *supportedp = B_TRUE; + + return (0); +} + +#endif /* EFSYS_OPT_SIENA && EFSYS_OPT_MCDI */ |