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/* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2012-2018 Solarflare Communications Inc.
* All rights reserved.
*/
#include "efx.h"
#include "efx_impl.h"
#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD
#if EFSYS_OPT_MCDI
#ifndef WITH_MCDI_V2
#error "WITH_MCDI_V2 required for EF10 MCDIv2 commands."
#endif
__checkReturn efx_rc_t
ef10_mcdi_init(
__in efx_nic_t *enp,
__in const efx_mcdi_transport_t *emtp)
{
efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
efsys_mem_t *esmp = emtp->emt_dma_mem;
efx_dword_t dword;
efx_rc_t rc;
EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
enp->en_family == EFX_FAMILY_MEDFORD);
EFSYS_ASSERT(enp->en_features & EFX_FEATURE_MCDI_DMA);
/*
* All EF10 firmware supports MCDIv2 and MCDIv1.
* Medford BootROM supports MCDIv2 and MCDIv1.
* Huntington BootROM supports MCDIv1 only.
*/
emip->emi_max_version = 2;
/* A host DMA buffer is required for EF10 MCDI */
if (esmp == NULL) {
rc = EINVAL;
goto fail1;
}
/*
* Ensure that the MC doorbell is in a known state before issuing MCDI
* commands. The recovery algorithm requires that the MC command buffer
* must be 256 byte aligned. See bug24769.
*/
if ((EFSYS_MEM_ADDR(esmp) & 0xFF) != 0) {
rc = EINVAL;
goto fail2;
}
EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 1);
EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
/* Save initial MC reboot status */
(void) ef10_mcdi_poll_reboot(enp);
/* Start a new epoch (allow fresh MCDI requests to succeed) */
efx_mcdi_new_epoch(enp);
return (0);
fail2:
EFSYS_PROBE(fail2);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
void
ef10_mcdi_fini(
__in efx_nic_t *enp)
{
efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
emip->emi_new_epoch = B_FALSE;
}
/*
* In older firmware all commands are processed in a single thread, so a long
* running command for one PCIe function can block processing for another
* function (see bug 61269).
*
* In newer firmware that supports multithreaded MCDI processing, we can extend
* the timeout for long-running requests which we know firmware may choose to
* process in a background thread.
*/
#define EF10_MCDI_CMD_TIMEOUT_US (10 * 1000 * 1000)
#define EF10_MCDI_CMD_LONG_TIMEOUT_US (60 * 1000 * 1000)
void
ef10_mcdi_get_timeout(
__in efx_nic_t *enp,
__in efx_mcdi_req_t *emrp,
__out uint32_t *timeoutp)
{
efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
switch (emrp->emr_cmd) {
case MC_CMD_POLL_BIST:
case MC_CMD_NVRAM_ERASE:
case MC_CMD_LICENSING_V3:
case MC_CMD_NVRAM_UPDATE_FINISH:
if (encp->enc_nvram_update_verify_result_supported != B_FALSE) {
/*
* Potentially longer running commands, which firmware
* may choose to process in a background thread.
*/
*timeoutp = EF10_MCDI_CMD_LONG_TIMEOUT_US;
break;
}
/* FALLTHRU */
default:
*timeoutp = EF10_MCDI_CMD_TIMEOUT_US;
break;
}
}
void
ef10_mcdi_send_request(
__in efx_nic_t *enp,
__in_bcount(hdr_len) void *hdrp,
__in size_t hdr_len,
__in_bcount(sdu_len) void *sdup,
__in size_t sdu_len)
{
const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
efsys_mem_t *esmp = emtp->emt_dma_mem;
efx_dword_t dword;
unsigned int pos;
EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
enp->en_family == EFX_FAMILY_MEDFORD);
/* Write the header */
for (pos = 0; pos < hdr_len; pos += sizeof (efx_dword_t)) {
dword = *(efx_dword_t *)((uint8_t *)hdrp + pos);
EFSYS_MEM_WRITED(esmp, pos, &dword);
}
/* Write the payload */
for (pos = 0; pos < sdu_len; pos += sizeof (efx_dword_t)) {
dword = *(efx_dword_t *)((uint8_t *)sdup + pos);
EFSYS_MEM_WRITED(esmp, hdr_len + pos, &dword);
}
/* Guarantee ordering of memory (MCDI request) and PIO (MC doorbell) */
EFSYS_DMA_SYNC_FOR_DEVICE(esmp, 0, hdr_len + sdu_len);
EFSYS_PIO_WRITE_BARRIER();
/* Ring the doorbell to post the command DMA address to the MC */
EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
EFSYS_MEM_ADDR(esmp) >> 32);
EFX_BAR_WRITED(enp, ER_DZ_MC_DB_LWRD_REG, &dword, B_FALSE);
EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0,
EFSYS_MEM_ADDR(esmp) & 0xffffffff);
EFX_BAR_WRITED(enp, ER_DZ_MC_DB_HWRD_REG, &dword, B_FALSE);
}
__checkReturn boolean_t
ef10_mcdi_poll_response(
__in efx_nic_t *enp)
{
const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
efsys_mem_t *esmp = emtp->emt_dma_mem;
efx_dword_t hdr;
EFSYS_MEM_READD(esmp, 0, &hdr);
EFSYS_MEM_READ_BARRIER();
return (EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE) ? B_TRUE : B_FALSE);
}
void
ef10_mcdi_read_response(
__in efx_nic_t *enp,
__out_bcount(length) void *bufferp,
__in size_t offset,
__in size_t length)
{
const efx_mcdi_transport_t *emtp = enp->en_mcdi.em_emtp;
efsys_mem_t *esmp = emtp->emt_dma_mem;
unsigned int pos;
efx_dword_t data;
for (pos = 0; pos < length; pos += sizeof (efx_dword_t)) {
EFSYS_MEM_READD(esmp, offset + pos, &data);
memcpy((uint8_t *)bufferp + pos, &data,
MIN(sizeof (data), length - pos));
}
}
efx_rc_t
ef10_mcdi_poll_reboot(
__in efx_nic_t *enp)
{
efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
efx_dword_t dword;
uint32_t old_status;
uint32_t new_status;
efx_rc_t rc;
old_status = emip->emi_mc_reboot_status;
/* Update MC reboot status word */
EFX_BAR_TBL_READD(enp, ER_DZ_BIU_MC_SFT_STATUS_REG, 0, &dword, B_FALSE);
new_status = dword.ed_u32[0];
/* MC has rebooted if the value has changed */
if (new_status != old_status) {
emip->emi_mc_reboot_status = new_status;
/*
* FIXME: Ignore detected MC REBOOT for now.
*
* The Siena support for checking for MC reboot from status
* flags is broken - see comments in siena_mcdi_poll_reboot().
* As the generic MCDI code is shared the EF10 reboot
* detection suffers similar problems.
*
* Do not report an error when the boot status changes until
* this can be handled by common code drivers (and reworked to
* support Siena too).
*/
_NOTE(CONSTANTCONDITION)
if (B_FALSE) {
rc = EIO;
goto fail1;
}
}
return (0);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
__checkReturn efx_rc_t
ef10_mcdi_feature_supported(
__in efx_nic_t *enp,
__in efx_mcdi_feature_id_t id,
__out boolean_t *supportedp)
{
efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
uint32_t privilege_mask = encp->enc_privilege_mask;
efx_rc_t rc;
EFSYS_ASSERT(enp->en_family == EFX_FAMILY_HUNTINGTON ||
enp->en_family == EFX_FAMILY_MEDFORD);
/*
* Use privilege mask state at MCDI attach.
*/
switch (id) {
case EFX_MCDI_FEATURE_FW_UPDATE:
/*
* Admin privilege must be used prior to introduction of
* specific flag.
*/
*supportedp =
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
break;
case EFX_MCDI_FEATURE_LINK_CONTROL:
/*
* Admin privilege used prior to introduction of
* specific flag.
*/
*supportedp =
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, LINK) ||
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
break;
case EFX_MCDI_FEATURE_MACADDR_CHANGE:
/*
* Admin privilege must be used prior to introduction of
* mac spoofing privilege (at v4.6), which is used up to
* introduction of change mac spoofing privilege (at v4.7)
*/
*supportedp =
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, CHANGE_MAC) ||
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
break;
case EFX_MCDI_FEATURE_MAC_SPOOFING:
/*
* Admin privilege must be used prior to introduction of
* mac spoofing privilege (at v4.6), which is used up to
* introduction of mac spoofing TX privilege (at v4.7)
*/
*supportedp =
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING_TX) ||
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
break;
default:
rc = ENOTSUP;
goto fail1;
}
return (0);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
#endif /* EFSYS_OPT_MCDI */
#endif /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD */
|