qemu/include/hw/ppc/spapr_drc.h

   1 /*
   2  * QEMU SPAPR Dynamic Reconfiguration Connector Implementation
   3  *
   4  * Copyright IBM Corp. 2014
   5  *
   6  * Authors:
   7  *  Michael Roth      <mdroth@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12 #if !defined(__HW_SPAPR_DRC_H__)
  13 #define __HW_SPAPR_DRC_H__
  14
  15 #include "qom/object.h"
  16 #include "hw/qdev.h"
  17 #include "libfdt.h"
  18
  19 #define TYPE_SPAPR_DR_CONNECTOR "spapr-dr-connector"
  20 #define SPAPR_DR_CONNECTOR_GET_CLASS(obj) \
  21         OBJECT_GET_CLASS(sPAPRDRConnectorClass, obj, TYPE_SPAPR_DR_CONNECTOR)
  22 #define SPAPR_DR_CONNECTOR_CLASS(klass) \
  23         OBJECT_CLASS_CHECK(sPAPRDRConnectorClass, klass, \
  24                            TYPE_SPAPR_DR_CONNECTOR)
  25 #define SPAPR_DR_CONNECTOR(obj) OBJECT_CHECK(sPAPRDRConnector, (obj), \
  26                                              TYPE_SPAPR_DR_CONNECTOR)
  27
  28 /*
  29  * Various hotplug types managed by sPAPRDRConnector
  30  *
  31  * these are somewhat arbitrary, but to make things easier
  32  * when generating DRC indexes later we've aligned the bit
  33  * positions with the values used to assign DRC indexes on
  34  * pSeries. we use those values as bit shifts to allow for
  35  * the OR'ing of these values in various QEMU routines, but
  36  * for values exposed to the guest (via DRC indexes for
  37  * instance) we will use the shift amounts.
  38  */
  39 typedef enum {
  40     SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU = 1,
  41     SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB = 2,
  42     SPAPR_DR_CONNECTOR_TYPE_SHIFT_VIO = 3,
  43     SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI = 4,
  44     SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB = 8,
  45 } sPAPRDRConnectorTypeShift;
  46
  47 typedef enum {
  48     SPAPR_DR_CONNECTOR_TYPE_ANY = ~0,
  49     SPAPR_DR_CONNECTOR_TYPE_CPU = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU,
  50     SPAPR_DR_CONNECTOR_TYPE_PHB = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB,
  51     SPAPR_DR_CONNECTOR_TYPE_VIO = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_VIO,
  52     SPAPR_DR_CONNECTOR_TYPE_PCI = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI,
  53     SPAPR_DR_CONNECTOR_TYPE_LMB = 1 << SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB,
  54 } sPAPRDRConnectorType;
  55
  56 /*
  57  * set via set-indicator RTAS calls
  58  * as documented by PAPR+ 2.7 13.5.3.4, Table 177
  59  *
  60  * isolated: put device under firmware control
  61  * unisolated: claim OS control of device (may or may not be in use)
  62  */
  63 typedef enum {
  64     SPAPR_DR_ISOLATION_STATE_ISOLATED   = 0,
  65     SPAPR_DR_ISOLATION_STATE_UNISOLATED = 1
  66 } sPAPRDRIsolationState;
  67
  68 /*
  69  * set via set-indicator RTAS calls
  70  * as documented by PAPR+ 2.7 13.5.3.4, Table 177
  71  *
  72  * unusable: mark device as unavailable to OS
  73  * usable: mark device as available to OS
  74  * exchange: (currently unused)
  75  * recover: (currently unused)
  76  */
  77 typedef enum {
  78     SPAPR_DR_ALLOCATION_STATE_UNUSABLE  = 0,
  79     SPAPR_DR_ALLOCATION_STATE_USABLE    = 1,
  80     SPAPR_DR_ALLOCATION_STATE_EXCHANGE  = 2,
  81     SPAPR_DR_ALLOCATION_STATE_RECOVER   = 3
  82 } sPAPRDRAllocationState;
  83
  84 /*
  85  * LED/visual indicator state
  86  *
  87  * set via set-indicator RTAS calls
  88  * as documented by PAPR+ 2.7 13.5.3.4, Table 177,
  89  * and PAPR+ 2.7 13.5.4.1, Table 180
  90  *
  91  * inactive: hotpluggable entity inactive and safely removable
  92  * active: hotpluggable entity in use and not safely removable
  93  * identify: (currently unused)
  94  * action: (currently unused)
  95  */
  96 typedef enum {
  97     SPAPR_DR_INDICATOR_STATE_INACTIVE   = 0,
  98     SPAPR_DR_INDICATOR_STATE_ACTIVE     = 1,
  99     SPAPR_DR_INDICATOR_STATE_IDENTIFY   = 2,
 100     SPAPR_DR_INDICATOR_STATE_ACTION     = 3,
 101 } sPAPRDRIndicatorState;
 102
 103 /*
 104  * returned via get-sensor-state RTAS calls
 105  * as documented by PAPR+ 2.7 13.5.3.3, Table 175:
 106  *
 107  * empty: connector slot empty (e.g. empty hotpluggable PCI slot)
 108  * present: connector slot populated and device available to OS
 109  * unusable: device not currently available to OS
 110  * exchange: (currently unused)
 111  * recover: (currently unused)
 112  */
 113 typedef enum {
 114     SPAPR_DR_ENTITY_SENSE_EMPTY     = 0,
 115     SPAPR_DR_ENTITY_SENSE_PRESENT   = 1,
 116     SPAPR_DR_ENTITY_SENSE_UNUSABLE  = 2,
 117     SPAPR_DR_ENTITY_SENSE_EXCHANGE  = 3,
 118     SPAPR_DR_ENTITY_SENSE_RECOVER   = 4,
 119 } sPAPRDREntitySense;
 120
 121 typedef enum {
 122     SPAPR_DR_CC_RESPONSE_NEXT_SIB         = 1, /* currently unused */
 123     SPAPR_DR_CC_RESPONSE_NEXT_CHILD       = 2,
 124     SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY    = 3,
 125     SPAPR_DR_CC_RESPONSE_PREV_PARENT      = 4,
 126     SPAPR_DR_CC_RESPONSE_SUCCESS          = 0,
 127     SPAPR_DR_CC_RESPONSE_ERROR            = -1,
 128     SPAPR_DR_CC_RESPONSE_CONTINUE         = -2,
 129     SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE = -9003,
 130 } sPAPRDRCCResponse;
 131
 132 typedef void (spapr_drc_detach_cb)(DeviceState *d, void *opaque);
 133
 134 typedef struct sPAPRDRConnector {
 135     /*< private >*/
 136     DeviceState parent;
 137
 138     sPAPRDRConnectorType type;
 139     uint32_t id;
 140     Object *owner;
 141     const char *name;
 142
 143     /* sensor/indicator states */
 144     uint32_t isolation_state;
 145     uint32_t allocation_state;
 146     uint32_t indicator_state;
 147
 148     /* configure-connector state */
 149     void *fdt;
 150     int fdt_start_offset;
 151     bool configured;
 152
 153     bool awaiting_release;
 154     bool signalled;
 155
 156     /* device pointer, via link property */
 157     DeviceState *dev;
 158     spapr_drc_detach_cb *detach_cb;
 159     void *detach_cb_opaque;
 160 } sPAPRDRConnector;
 161
 162 typedef struct sPAPRDRConnectorClass {
 163     /*< private >*/
 164     DeviceClass parent;
 165
 166     /*< public >*/
 167
 168     /* accessors for guest-visible (generally via RTAS) DR state */
 169     uint32_t (*set_isolation_state)(sPAPRDRConnector *drc,
 170                                     sPAPRDRIsolationState state);
 171     uint32_t (*set_indicator_state)(sPAPRDRConnector *drc,
 172                                     sPAPRDRIndicatorState state);
 173     uint32_t (*set_allocation_state)(sPAPRDRConnector *drc,
 174                                      sPAPRDRAllocationState state);
 175     uint32_t (*get_index)(sPAPRDRConnector *drc);
 176     uint32_t (*get_type)(sPAPRDRConnector *drc);
 177     const char *(*get_name)(sPAPRDRConnector *drc);
 178
 179     uint32_t (*entity_sense)(sPAPRDRConnector *drc, sPAPRDREntitySense *state);
 180
 181     /* QEMU interfaces for managing FDT/configure-connector */
 182     const void *(*get_fdt)(sPAPRDRConnector *drc, int *fdt_start_offset);
 183     void (*set_configured)(sPAPRDRConnector *drc);
 184
 185     /* QEMU interfaces for managing hotplug operations */
 186     void (*attach)(sPAPRDRConnector *drc, DeviceState *d, void *fdt,
 187                    int fdt_start_offset, bool coldplug, Error **errp);
 188     void (*detach)(sPAPRDRConnector *drc, DeviceState *d,
 189                    spapr_drc_detach_cb *detach_cb,
 190                    void *detach_cb_opaque, Error **errp);
 191     bool (*release_pending)(sPAPRDRConnector *drc);
 192     void (*set_signalled)(sPAPRDRConnector *drc);
 193 } sPAPRDRConnectorClass;
 194
 195 sPAPRDRConnector *spapr_dr_connector_new(Object *owner,
 196                                          sPAPRDRConnectorType type,
 197                                          uint32_t id);
 198 sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index);
 199 sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type,
 200                                            uint32_t id);
 201 int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner,
 202                           uint32_t drc_type_mask);
 203
 204 #endif /* __HW_SPAPR_DRC_H__ */