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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/occ_405/pss/dpss.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 */
#include "ssx.h"
#include <dpss.h>
#include <trac.h>
#include <occ_common.h>
#include <comp_ids.h>
#include <occ_sys_config.h>
#include <trac_interface.h>
#include <occ_service_codes.h>
#include <pss_service_codes.h>
#include <state.h>
#include <amec_oversub.h>
#include <ppc405_irq.h>
// Macro creates a 'bridge' handler that converts the initial fast-mode to full-
// mode interrupt handler
SSX_IRQ_FAST2FULL(isr_dpss_oversubscription_handler, isr_dpss_oversubscription_handler_full);
// Increment a counter each time we see a phantom interrupt (used by health monitor thread)
uint32_t G_occ_phantom_critical_count = 0;
uint32_t G_occ_phantom_noncritical_count = 0;
// Function Specification
//
// Name: isr_dpss_oversubscription_handler_full
//
// Description: From the flow diagram:
// Will eventually be doing something to set the Pstates & Memory
// Throttles when this interrupt occurs, but for now just put in this
// comment and no code besides clearing the irq and tracing the fact that
// we got an interrupt.
//
// End Function Specification
void isr_dpss_oversubscription_handler_full(void *private, SsxIrqId irq, int priority)
{
SsxMachineContext ctx;
// disable further interrupts at this level
ssx_irq_disable(irq);
// enter the protected context
ssx_critical_section_enter( SSX_CRITICAL, &ctx );
// clear this irq
ssx_irq_status_clear(irq);
// exit the protected context
ssx_critical_section_exit( &ctx );
// call oversub isr
amec_oversub_isr();
// re-enable interrupts at this level
ssx_irq_enable(irq);
} // end isr_dpss_oversubscription_handler_full
// Function Specification
//
// Name: occ_phantom_irq_handler
//
// Description:
// handler for an interrupt that fired and then went away before
// we could read what it was.
//
// End Function Specification
void occ_phantom_irq_handler(void* i_arg, SsxIrqId i_irq, int i_critical)
{
if(i_critical == SSX_CRITICAL)
{
G_occ_phantom_critical_count++;
}
else
{
G_occ_phantom_noncritical_count++;
}
}
// Function Specification
//
// Name: dpss_oversubscription_irq_initialize
//
// Description:
// Installs the power oversubscription IRQ handler for the DPSS
//
// End Function Specification
errlHndl_t dpss_oversubscription_irq_initialize()
{
int rc = 0;
errlHndl_t l_err = NULL;
// NOTE: It is believed that the oversubscription interrupt bounces
// on and off as power supplies are re-inserted. If it happens quickly enough
// it will clear the interrupt before the code has a chance to see the cause
// of the interrupt. The default phantom handler would then be invoked and
// cause occ to panic. Instead, we just increment a counter and log an info
// error.
__ppc405_phantom_irq.handler = occ_phantom_irq_handler;
// Disable the IRQ while we work on it
ssx_irq_disable(OCCHW_IRQ_EXTERNAL_TRAP);
// Setup the IRQ
rc = ssx_irq_setup(OCCHW_IRQ_EXTERNAL_TRAP,
SSX_IRQ_POLARITY_ACTIVE_LOW,
SSX_IRQ_TRIGGER_LEVEL_SENSITIVE);
if( rc ) {
TRAC_ERR("%s: Failed IRQ setup.", __FUNCTION__);
/*@
* @moduleid PSS_MID_DPSS_OVS_IRQ_INIT
* @reasonCode SSX_GENERIC_FAILURE
* @severity ERRL_SEV_PREDICTIVE
* @userdata1 ssx_irq_setup return code
* @userdata4 ERC_SSX_IRQ_SETUP_FAILURE
* @devdesc Firmware failure initializing DPSS IRQ
*/
l_err = createErrl( PSS_MID_DPSS_OVS_IRQ_INIT, // i_modId
SSX_GENERIC_FAILURE, // i_reasonCode
ERC_SSX_IRQ_SETUP_FAILURE,
ERRL_SEV_PREDICTIVE,
NULL, // tracDesc_t i_trace
0, // i_traceSz
rc, // i_userData1
0); // i_userData2
}
else {
// Set the IRQ handler
rc = ssx_irq_handler_set(OCCHW_IRQ_EXTERNAL_TRAP,
isr_dpss_oversubscription_handler,
NULL,
SSX_NONCRITICAL);
if( rc ) {
TRAC_ERR("%s: Failed to set the IRQ handler.", __FUNCTION__);
/*@
* @moduleid PSS_MID_DPSS_OVS_IRQ_INIT
* @reasonCode SSX_GENERIC_FAILURE
* @severity ERRL_SEV_PREDICTIVE
* @userdata1 ssx_irq_handler_set return code
* @userdata4 ERC_SSX_IRQ_HANDLER_SET_FAILURE
* @devdesc Firmware failure setting up DPSS routine
*/
l_err = createErrl( PSS_MID_DPSS_OVS_IRQ_INIT, // i_modId
SSX_GENERIC_FAILURE, // i_reasonCode
ERC_SSX_IRQ_HANDLER_SET_FAILURE,
ERRL_SEV_PREDICTIVE,
NULL, // tracDesc_t i_trace
0, // i_traceSz
rc, // i_userData1
0); // i_userData2
}
else {
// Enable the IRQ
ssx_irq_status_clear(OCCHW_IRQ_EXTERNAL_TRAP);
ssx_irq_enable(OCCHW_IRQ_EXTERNAL_TRAP);
}
}
return l_err;
} // end dpss_oversubscription_irq_initialize
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