diff options
Diffstat (limited to 'src/occ_405/amec/amec_oversub.c')
| -rwxr-xr-x | src/occ_405/amec/amec_oversub.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/src/occ_405/amec/amec_oversub.c b/src/occ_405/amec/amec_oversub.c new file mode 100755 index 0000000..beff792 --- /dev/null +++ b/src/occ_405/amec/amec_oversub.c @@ -0,0 +1,252 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/occ_405/amec/amec_oversub.c $ */ +/* */ +/* OpenPOWER OnChipController Project */ +/* */ +/* Contributors Listed Below - COPYRIGHT 2011,2015 */ +/* [+] International Business Machines Corp. */ +/* */ +/* */ +/* Licensed under the Apache License, Version 2.0 (the "License"); */ +/* you may not use this file except in compliance with the License. */ +/* You may obtain a copy of the License at */ +/* */ +/* http://www.apache.org/licenses/LICENSE-2.0 */ +/* */ +/* Unless required by applicable law or agreed to in writing, software */ +/* distributed under the License is distributed on an "AS IS" BASIS, */ +/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */ +/* implied. See the License for the specific language governing */ +/* permissions and limitations under the License. */ +/* */ +/* IBM_PROLOG_END_TAG */ + +//************************************************************************* +// Includes +//************************************************************************* +#include "ssx.h" +#include <occ_common.h> +#include <trac.h> +#include <amec_sys.h> +#include <proc_pstate.h> +#include <dcom.h> +#include <occ_sys_config.h> +#include <amec_service_codes.h> + +//************************************************************************* +// Externs +//************************************************************************* + +//************************************************************************* +// Macros +//************************************************************************* + +//************************************************************************* +// Defines/Enums +//************************************************************************* +#define OVERSUB_REASON_DELAY_4MS 16 // 4ms (unit is 250us) +#define OVERSUB_REASON_COUNT_TIMEOUT 2 +#define OVERSUB_REASON_DETERMINED 1 + +//************************************************************************* +// Structures +//************************************************************************* + +//************************************************************************* +// Globals +//************************************************************************* + +//************************************************************************* +// Function Prototypes +//************************************************************************* + +//************************************************************************* +// Functions +//************************************************************************* + +// Function Specification +// +// Name: amec_oversub_pmax_clip +// +// Description: Set Pmax_Clip in PMC to lowest Pstate +// +// Task Flags: +// +// End Function Specification +void amec_oversub_pmax_clip(Pstate i_pstate) +{ + pmc_rail_bounds_register_t prbr; + + // Set Pmax_Clip in PMC to lowest Pstate + prbr.value = in32(PMC_RAIL_BOUNDS_REGISTER); + prbr.fields.pmax_rail = i_pstate; + out32(PMC_RAIL_BOUNDS_REGISTER, prbr.value); +} + +// Function Specification +// +// Name: amec_oversub_isr +// +// Description: Oversubscription ISR +// +// Task Flags: +// +// Note: This function is only ever called from Critical interrupt context +// +// End Function Specification +void amec_oversub_isr(void) +{ + static uint32_t l_isr_count = 0; + static uint8_t l_polarity = SSX_IRQ_POLARITY_ACTIVE_LOW; // Default is low + uint8_t l_cur_polarity = l_polarity; + + l_isr_count++; + + // SSX_IRQ_POLARITY_ACTIVE_LOW means over-subscription is active + if(l_polarity == SSX_IRQ_POLARITY_ACTIVE_LOW) + { + // If RTL doesn't control it, do it here + if(g_amec->oversub_status.oversubLatchAmec == 0) + { + // Set PMC Pmax_clip to Pmin and throttle all Cores via OCI write to PMC + amec_oversub_pmax_clip(gpst_pmin(&G_global_pstate_table)); + + // TODO: Throttle all Centaurs via PORE-GPE by setting 'Emergency Throttle' + + g_amec->oversub_status.oversubReasonLatchCount = OVERSUB_REASON_DELAY_4MS; + } + + // Set oversubPinLive and oversubActiveTime + g_amec->oversub_status.oversubPinLive = 1; + g_amec->oversub_status.oversubActiveTime = ssx_timebase_get(); + + // Setup the IRQ + ssx_irq_setup(PGP_IRQ_EXTERNAL_TRAP, + SSX_IRQ_POLARITY_ACTIVE_HIGH, + SSX_IRQ_TRIGGER_LEVEL_SENSITIVE); + l_polarity = SSX_IRQ_POLARITY_ACTIVE_HIGH; + + } + else // over-subscription is inactive + { + // Clear oversubPinLive + g_amec->oversub_status.oversubPinLive = 0; + + // Set oversubInActiveTime + g_amec->oversub_status.oversubInactiveTime = ssx_timebase_get(); + + // Setup the IRQ + ssx_irq_setup(PGP_IRQ_EXTERNAL_TRAP, + SSX_IRQ_POLARITY_ACTIVE_LOW, + SSX_IRQ_TRIGGER_LEVEL_SENSITIVE); + + l_polarity = SSX_IRQ_POLARITY_ACTIVE_LOW; + } + + // Trace Oversub Event, Polarity and ISR count + TRAC_INFO("Oversub IRQ - Polarity (low active):%d, oversubPinLive: %d, count: %d)", l_cur_polarity, g_amec->oversub_status.oversubPinLive, l_isr_count); + +} + +// Function Specification +// +// Name: amec_oversub_check +// +// Description: Oversubscription check called in amec_slv_common_tasks_pre() +// +// Task Flags: +// +// End Function Specification +void amec_oversub_check(void) +{ + uint8_t l_cme_pin_value = 1; // low active, so set default to high + static BOOLEAN l_prev_ovs_state = FALSE; // oversub happened + + // Get CME Pin state + // No longer reading gpio from APSS in GA1 due to instability in APSS composite mode + //apss_gpio_get(l_cme_pin, &l_cme_pin_value); + + // Check CME Pin? OR CME Oversub Mnfg Active + if( (l_cme_pin_value == 0) || + (g_amec->oversub_status.cmeThrottlePinMnfg == 1) ) + { + g_amec->oversub_status.cmeThrottlePinLive = 1; + g_amec->oversub_status.cmeThrottleLatchAmec = 1; + } + else + { + // Do not clear cmeThrottleLatchAmec. + // That will only be done via the PowerCa command from TMGT. + g_amec->oversub_status.cmeThrottlePinLive = 0; + } + + // oversubscription condition happened? + if ( AMEC_INTF_GET_OVERSUBSCRIPTION() == TRUE ) + { + if ( l_prev_ovs_state != TRUE) + { + l_prev_ovs_state = TRUE; + + TRAC_ERR("Oversubscription condition happened"); + /* @ + * @errortype + * @moduleid AMEC_SLAVE_CHECK_PERFORMANCE + * @reasoncode OVERSUB_ALERT + * @userdata1 Previous OVS State + * @userdata4 ERC_AMEC_SLAVE_OVS_STATE + * @devdesc Oversubscription condition happened + */ + errlHndl_t l_errl = createErrl(AMEC_SLAVE_CHECK_PERFORMANCE,//modId + OVERSUB_ALERT, //reasoncode + ERC_AMEC_SLAVE_OVS_STATE, //Extended reason code + ERRL_SEV_INFORMATIONAL, //Severity + NULL, //Trace Buf + DEFAULT_TRACE_SIZE, //Trace Size + l_prev_ovs_state, //userdata1 + 0); //userdata2 + + // set the mfg action flag (allows callout to be added to info error) + setErrlActions(l_errl, ERRL_ACTIONS_MANUFACTURING_ERROR); + + // add the oversubscription symbolic callout + addCalloutToErrl(l_errl, + ERRL_CALLOUT_TYPE_COMPONENT_ID, + ERRL_COMPONENT_ID_OVERSUBSCRIPTION, + ERRL_CALLOUT_PRIORITY_HIGH); + + // Commit Error + commitErrl(&l_errl); + } + } + else + { + l_prev_ovs_state = FALSE; + } + + // Figure out the over-subscription reason + if(g_amec->oversub_status.oversubReasonLatchCount > 1) + { + // Try to figure out why we throttled based on APSS GPIO pins + if( g_amec->oversub_status.oversubReasonLatchCount == OVERSUB_REASON_COUNT_TIMEOUT) + { + g_amec->oversub_status.oversubReason = INDETERMINATE; + g_amec->oversub_status.oversubReasonLatchCount = OVERSUB_REASON_DETERMINED; + + TRAC_INFO("Oversub (oversubReason: %d)", g_amec->oversub_status.oversubReason ); + } + else + { + // If we can figure out why oversub happened, set oversubReason to valide enum value + // then set oversubReasonLatchCount = 1 + + // If we can't figure it out, decrease oversubReasonLatchCount and we will try again in 250us + g_amec->oversub_status.oversubReasonLatchCount--; // The unit of oversubReasonLatchCount is 250us + } + } +} + +/*----------------------------------------------------------------------------*/ +/* End */ +/*----------------------------------------------------------------------------*/ |
