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qemu/include/hw/ppc/spapr_drc.h
Greg Kurz 4b63db1289 spapr: Don't use spapr_drc_needed() in CAS code 
We currently don't support hotplug of devices between boot and CAS. If
this happens a CAS reboot is triggered. We detect this during CAS using
the spapr_drc_needed() function which is essentially a VMStateDescription
.needed callback. Even if the condition for CAS reboot happens to be the
same as for DRC migration, it looks wrong to piggyback a migration helper
for this.

Introduce a helper with slightly more explicit name and use it in both CAS
and DRC migration code. Since a subsequent patch will enhance this helper
to cover the case of hot unplug, let's go for spapr_drc_transient(). While
here convert spapr_hotplugged_dev_before_cas() to the "transient" wording as
well.

This doesn't change any behaviour.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <158169248180.3465937.9531405453362718771.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-02-21 09:15:04 +11:00

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/*
* QEMU SPAPR Dynamic Reconfiguration Connector Implementation
*
* Copyright IBM Corp. 2014
*
* Authors:
* Michael Roth <mdroth@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_SPAPR_DRC_H
#define HW_SPAPR_DRC_H
#include <libfdt.h>
#include "qom/object.h"
#include "sysemu/runstate.h"
#include "hw/qdev-core.h"
#include "qapi/error.h"
#define TYPE_SPAPR_DR_CONNECTOR "spapr-dr-connector"
#define SPAPR_DR_CONNECTOR_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DR_CONNECTOR)
#define SPAPR_DR_CONNECTOR_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, \
TYPE_SPAPR_DR_CONNECTOR)
#define SPAPR_DR_CONNECTOR(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DR_CONNECTOR)
#define TYPE_SPAPR_DRC_PHYSICAL "spapr-drc-physical"
#define SPAPR_DRC_PHYSICAL_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_PHYSICAL)
#define SPAPR_DRC_PHYSICAL_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, \
TYPE_SPAPR_DRC_PHYSICAL)
#define SPAPR_DRC_PHYSICAL(obj) OBJECT_CHECK(SpaprDrcPhysical, (obj), \
TYPE_SPAPR_DRC_PHYSICAL)
#define TYPE_SPAPR_DRC_LOGICAL "spapr-drc-logical"
#define SPAPR_DRC_LOGICAL_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_LOGICAL)
#define SPAPR_DRC_LOGICAL_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, \
TYPE_SPAPR_DRC_LOGICAL)
#define SPAPR_DRC_LOGICAL(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_LOGICAL)
#define TYPE_SPAPR_DRC_CPU "spapr-drc-cpu"
#define SPAPR_DRC_CPU_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_CPU)
#define SPAPR_DRC_CPU_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, TYPE_SPAPR_DRC_CPU)
#define SPAPR_DRC_CPU(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_CPU)
#define TYPE_SPAPR_DRC_PCI "spapr-drc-pci"
#define SPAPR_DRC_PCI_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_PCI)
#define SPAPR_DRC_PCI_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, TYPE_SPAPR_DRC_PCI)
#define SPAPR_DRC_PCI(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_PCI)
#define TYPE_SPAPR_DRC_LMB "spapr-drc-lmb"
#define SPAPR_DRC_LMB_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_LMB)
#define SPAPR_DRC_LMB_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, TYPE_SPAPR_DRC_LMB)
#define SPAPR_DRC_LMB(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_LMB)
#define TYPE_SPAPR_DRC_PHB "spapr-drc-phb"
#define SPAPR_DRC_PHB_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_PHB)
#define SPAPR_DRC_PHB_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, TYPE_SPAPR_DRC_PHB)
#define SPAPR_DRC_PHB(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_PHB)
#define TYPE_SPAPR_DRC_PMEM "spapr-drc-pmem"
#define SPAPR_DRC_PMEM_GET_CLASS(obj) \
OBJECT_GET_CLASS(SpaprDrcClass, obj, TYPE_SPAPR_DRC_PMEM)
#define SPAPR_DRC_PMEM_CLASS(klass) \
OBJECT_CLASS_CHECK(SpaprDrcClass, klass, TYPE_SPAPR_DRC_PMEM)
#define SPAPR_DRC_PMEM(obj) OBJECT_CHECK(SpaprDrc, (obj), \
TYPE_SPAPR_DRC_PMEM)
/*
* Various hotplug types managed by SpaprDrc
*
* these are somewhat arbitrary, but to make things easier
* when generating DRC indexes later we've aligned the bit
* positions with the values used to assign DRC indexes on
* pSeries. we use those values as bit shifts to allow for
* the OR'ing of these values in various QEMU routines, but
* for values exposed to the guest (via DRC indexes for
* instance) we will use the shift amounts.
*/
typedef enum {
SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU = 1,
SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB = 2,
SPAPR_DR_CONNECTOR_TYPE_SHIFT_VIO = 3,
SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI = 4,
SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB = 8,
SPAPR_DR_CONNECTOR_TYPE_SHIFT_PMEM = 9,
} SpaprDrcTypeShift;
typedef enum {
SPAPR_DR_CONNECTOR_TYPE_ANY = ~0,
SPAPR_DR_CONNECTOR_TYPE_CPU = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU,
SPAPR_DR_CONNECTOR_TYPE_PHB = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB,
SPAPR_DR_CONNECTOR_TYPE_VIO = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_VIO,
SPAPR_DR_CONNECTOR_TYPE_PCI = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI,
SPAPR_DR_CONNECTOR_TYPE_LMB = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB,
SPAPR_DR_CONNECTOR_TYPE_PMEM = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_PMEM,
} SpaprDrcType;
/*
* set via set-indicator RTAS calls
* as documented by PAPR+ 2.7 13.5.3.4, Table 177
*
* isolated: put device under firmware control
* unisolated: claim OS control of device (may or may not be in use)
*/
typedef enum {
SPAPR_DR_ISOLATION_STATE_ISOLATED = 0,
SPAPR_DR_ISOLATION_STATE_UNISOLATED = 1
} SpaprDRIsolationState;
/*
* set via set-indicator RTAS calls
* as documented by PAPR+ 2.7 13.5.3.4, Table 177
*
* unusable: mark device as unavailable to OS
* usable: mark device as available to OS
* exchange: (currently unused)
* recover: (currently unused)
*/
typedef enum {
SPAPR_DR_ALLOCATION_STATE_UNUSABLE = 0,
SPAPR_DR_ALLOCATION_STATE_USABLE = 1,
SPAPR_DR_ALLOCATION_STATE_EXCHANGE = 2,
SPAPR_DR_ALLOCATION_STATE_RECOVER = 3
} SpaprDRAllocationState;
/*
* DR-indicator (LED/visual indicator)
*
* set via set-indicator RTAS calls
* as documented by PAPR+ 2.7 13.5.3.4, Table 177,
* and PAPR+ 2.7 13.5.4.1, Table 180
*
* inactive: hotpluggable entity inactive and safely removable
* active: hotpluggable entity in use and not safely removable
* identify: (currently unused)
* action: (currently unused)
*/
typedef enum {
SPAPR_DR_INDICATOR_INACTIVE = 0,
SPAPR_DR_INDICATOR_ACTIVE = 1,
SPAPR_DR_INDICATOR_IDENTIFY = 2,
SPAPR_DR_INDICATOR_ACTION = 3,
} SpaprDRIndicatorState;
/*
* returned via get-sensor-state RTAS calls
* as documented by PAPR+ 2.7 13.5.3.3, Table 175:
*
* empty: connector slot empty (e.g. empty hotpluggable PCI slot)
* present: connector slot populated and device available to OS
* unusable: device not currently available to OS
* exchange: (currently unused)
* recover: (currently unused)
*/
typedef enum {
SPAPR_DR_ENTITY_SENSE_EMPTY = 0,
SPAPR_DR_ENTITY_SENSE_PRESENT = 1,
SPAPR_DR_ENTITY_SENSE_UNUSABLE = 2,
SPAPR_DR_ENTITY_SENSE_EXCHANGE = 3,
SPAPR_DR_ENTITY_SENSE_RECOVER = 4,
} SpaprDREntitySense;
typedef enum {
SPAPR_DR_CC_RESPONSE_NEXT_SIB = 1, /* currently unused */
SPAPR_DR_CC_RESPONSE_NEXT_CHILD = 2,
SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY = 3,
SPAPR_DR_CC_RESPONSE_PREV_PARENT = 4,
SPAPR_DR_CC_RESPONSE_SUCCESS = 0,
SPAPR_DR_CC_RESPONSE_ERROR = -1,
SPAPR_DR_CC_RESPONSE_CONTINUE = -2,
SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE = -9003,
} SpaprDRCCResponse;
typedef enum {
/*
* Values come from Fig. 12 in LoPAPR section 13.4
*
* These are exposed in the migration stream, so don't change
* them.
*/
SPAPR_DRC_STATE_INVALID = 0,
SPAPR_DRC_STATE_LOGICAL_UNUSABLE = 1,
SPAPR_DRC_STATE_LOGICAL_AVAILABLE = 2,
SPAPR_DRC_STATE_LOGICAL_UNISOLATE = 3,
SPAPR_DRC_STATE_LOGICAL_CONFIGURED = 4,
SPAPR_DRC_STATE_PHYSICAL_AVAILABLE = 5,
SPAPR_DRC_STATE_PHYSICAL_POWERON = 6,
SPAPR_DRC_STATE_PHYSICAL_UNISOLATE = 7,
SPAPR_DRC_STATE_PHYSICAL_CONFIGURED = 8,
} SpaprDrcState;
typedef struct SpaprDrc {
/*< private >*/
DeviceState parent;
uint32_t id;
Object *owner;
uint32_t state;
/* RTAS ibm,configure-connector state */
/* (only valid in UNISOLATE state) */
int ccs_offset;
int ccs_depth;
/* device pointer, via link property */
DeviceState *dev;
bool unplug_requested;
void *fdt;
int fdt_start_offset;
} SpaprDrc;
struct SpaprMachineState;
typedef struct SpaprDrcClass {
/*< private >*/
DeviceClass parent;
SpaprDrcState empty_state;
SpaprDrcState ready_state;
/*< public >*/
SpaprDrcTypeShift typeshift;
const char *typename; /* used in device tree, PAPR 13.5.2.6 & C.6.1 */
const char *drc_name_prefix; /* used other places in device tree */
SpaprDREntitySense (*dr_entity_sense)(SpaprDrc *drc);
uint32_t (*isolate)(SpaprDrc *drc);
uint32_t (*unisolate)(SpaprDrc *drc);
void (*release)(DeviceState *dev);
int (*dt_populate)(SpaprDrc *drc, struct SpaprMachineState *spapr,
void *fdt, int *fdt_start_offset, Error **errp);
} SpaprDrcClass;
typedef struct SpaprDrcPhysical {
/*< private >*/
SpaprDrc parent;
/* DR-indicator */
uint32_t dr_indicator;
} SpaprDrcPhysical;
static inline bool spapr_drc_hotplugged(DeviceState *dev)
{
return dev->hotplugged && !runstate_check(RUN_STATE_INMIGRATE);
}
void spapr_drc_reset(SpaprDrc *drc);
uint32_t spapr_drc_index(SpaprDrc *drc);
SpaprDrcType spapr_drc_type(SpaprDrc *drc);
SpaprDrc *spapr_dr_connector_new(Object *owner, const char *type,
uint32_t id);
SpaprDrc *spapr_drc_by_index(uint32_t index);
SpaprDrc *spapr_drc_by_id(const char *type, uint32_t id);
int spapr_dt_drc(void *fdt, int offset, Object *owner, uint32_t drc_type_mask);
void spapr_drc_attach(SpaprDrc *drc, DeviceState *d, Error **errp);
void spapr_drc_detach(SpaprDrc *drc);
/* Returns true if a hot plug/unplug request is pending */
bool spapr_drc_transient(SpaprDrc *drc);
static inline bool spapr_drc_unplug_requested(SpaprDrc *drc)
{
return drc->unplug_requested;
}
#endif /* HW_SPAPR_DRC_H */
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