include/hw/ppc/xics.h

   1 /*
   2  * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3  *
   4  * PAPR Virtualized Interrupt System, aka ICS/ICP aka xics
   5  *
   6  * Copyright (c) 2010,2011 David Gibson, IBM Corporation.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  *
  26  */
  27
  28 #ifndef XICS_H
  29 #define XICS_H
  30
  31 #include "hw/qdev.h"
  32
  33 #define XICS_IPI        0x2
  34 #define XICS_BUID       0x1
  35 #define XICS_IRQ_BASE   (XICS_BUID << 12)
  36
  37 /*
  38  * We currently only support one BUID which is our interrupt base
  39  * (the kernel implementation supports more but we don't exploit
  40  *  that yet)
  41  */
  42 typedef struct ICPStateClass ICPStateClass;
  43 typedef struct ICPState ICPState;
  44 typedef struct PnvICPState PnvICPState;
  45 typedef struct ICSStateClass ICSStateClass;
  46 typedef struct ICSState ICSState;
  47 typedef struct ICSIRQState ICSIRQState;
  48 typedef struct XICSFabric XICSFabric;
  49
  50 #define TYPE_ICP "icp"
  51 #define ICP(obj) OBJECT_CHECK(ICPState, (obj), TYPE_ICP)
  52
  53 #define TYPE_PNV_ICP "pnv-icp"
  54 #define PNV_ICP(obj) OBJECT_CHECK(PnvICPState, (obj), TYPE_PNV_ICP)
  55
  56 #define ICP_CLASS(klass) \
  57      OBJECT_CLASS_CHECK(ICPStateClass, (klass), TYPE_ICP)
  58 #define ICP_GET_CLASS(obj) \
  59      OBJECT_GET_CLASS(ICPStateClass, (obj), TYPE_ICP)
  60
  61 struct ICPStateClass {
  62     DeviceClass parent_class;
  63
  64     DeviceRealize parent_realize;
  65 };
  66
  67 struct ICPState {
  68     /*< private >*/
  69     DeviceState parent_obj;
  70     /*< public >*/
  71     CPUState *cs;
  72     ICSState *xirr_owner;
  73     uint32_t xirr;
  74     uint8_t pending_priority;
  75     uint8_t mfrr;
  76     qemu_irq output;
  77
  78     XICSFabric *xics;
  79 };
  80
  81 #define ICP_PROP_XICS "xics"
  82 #define ICP_PROP_CPU "cpu"
  83
  84 struct PnvICPState {
  85     ICPState parent_obj;
  86
  87     MemoryRegion mmio;
  88     uint32_t links[3];
  89 };
  90
  91 #define TYPE_ICS_BASE "ics-base"
  92 #define ICS_BASE(obj) OBJECT_CHECK(ICSState, (obj), TYPE_ICS_BASE)
  93
  94 /* Retain ics for sPAPR for migration from existing sPAPR guests */
  95 #define TYPE_ICS_SIMPLE "ics"
  96 #define ICS_SIMPLE(obj) OBJECT_CHECK(ICSState, (obj), TYPE_ICS_SIMPLE)
  97
  98 #define ICS_BASE_CLASS(klass) \
  99      OBJECT_CLASS_CHECK(ICSStateClass, (klass), TYPE_ICS_BASE)
 100 #define ICS_BASE_GET_CLASS(obj) \
 101      OBJECT_GET_CLASS(ICSStateClass, (obj), TYPE_ICS_BASE)
 102
 103 struct ICSStateClass {
 104     DeviceClass parent_class;
 105
 106     DeviceRealize parent_realize;
 107     DeviceReset parent_reset;
 108
 109     void (*reject)(ICSState *s, uint32_t irq);
 110     void (*resend)(ICSState *s);
 111     void (*eoi)(ICSState *s, uint32_t irq);
 112 };
 113
 114 struct ICSState {
 115     /*< private >*/
 116     DeviceState parent_obj;
 117     /*< public >*/
 118     uint32_t nr_irqs;
 119     uint32_t offset;
 120     ICSIRQState *irqs;
 121     XICSFabric *xics;
 122 };
 123
 124 #define ICS_PROP_XICS "xics"
 125
 126 static inline bool ics_valid_irq(ICSState *ics, uint32_t nr)
 127 {
 128     return (nr >= ics->offset) && (nr < (ics->offset + ics->nr_irqs));
 129 }
 130
 131 struct ICSIRQState {
 132     uint32_t server;
 133     uint8_t priority;
 134     uint8_t saved_priority;
 135 #define XICS_STATUS_ASSERTED           0x1
 136 #define XICS_STATUS_SENT               0x2
 137 #define XICS_STATUS_REJECTED           0x4
 138 #define XICS_STATUS_MASKED_PENDING     0x8
 139 #define XICS_STATUS_PRESENTED          0x10
 140 #define XICS_STATUS_QUEUED             0x20
 141     uint8_t status;
 142 /* (flags & XICS_FLAGS_IRQ_MASK) == 0 means the interrupt is not allocated */
 143 #define XICS_FLAGS_IRQ_LSI             0x1
 144 #define XICS_FLAGS_IRQ_MSI             0x2
 145 #define XICS_FLAGS_IRQ_MASK            0x3
 146     uint8_t flags;
 147 };
 148
 149 struct XICSFabric {
 150     Object parent;
 151 };
 152
 153 #define TYPE_XICS_FABRIC "xics-fabric"
 154 #define XICS_FABRIC(obj)                                     \
 155     OBJECT_CHECK(XICSFabric, (obj), TYPE_XICS_FABRIC)
 156 #define XICS_FABRIC_CLASS(klass)                                     \
 157     OBJECT_CLASS_CHECK(XICSFabricClass, (klass), TYPE_XICS_FABRIC)
 158 #define XICS_FABRIC_GET_CLASS(obj)                                   \
 159     OBJECT_GET_CLASS(XICSFabricClass, (obj), TYPE_XICS_FABRIC)
 160
 161 typedef struct XICSFabricClass {
 162     InterfaceClass parent;
 163     ICSState *(*ics_get)(XICSFabric *xi, int irq);
 164     void (*ics_resend)(XICSFabric *xi);
 165     ICPState *(*icp_get)(XICSFabric *xi, int server);
 166 } XICSFabricClass;
 167
 168 ICPState *xics_icp_get(XICSFabric *xi, int server);
 169
 170 /* Internal XICS interfaces */
 171 void icp_set_cppr(ICPState *icp, uint8_t cppr);
 172 void icp_set_mfrr(ICPState *icp, uint8_t mfrr);
 173 uint32_t icp_accept(ICPState *ss);
 174 uint32_t icp_ipoll(ICPState *ss, uint32_t *mfrr);
 175 void icp_eoi(ICPState *icp, uint32_t xirr);
 176
 177 void ics_simple_write_xive(ICSState *ics, int nr, int server,
 178                            uint8_t priority, uint8_t saved_priority);
 179 void ics_simple_set_irq(void *opaque, int srcno, int val);
 180
 181 void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
 182 void icp_pic_print_info(ICPState *icp, Monitor *mon);
 183 void ics_pic_print_info(ICSState *ics, Monitor *mon);
 184
 185 void ics_resend(ICSState *ics);
 186 void icp_resend(ICPState *ss);
 187
 188 Object *icp_create(Object *cpu, const char *type, XICSFabric *xi,
 189                    Error **errp);
 190
 191 /* KVM */
 192 void icp_get_kvm_state(ICPState *icp);
 193 int icp_set_kvm_state(ICPState *icp, Error **errp);
 194 void icp_synchronize_state(ICPState *icp);
 195 void icp_kvm_realize(DeviceState *dev, Error **errp);
 196
 197 void ics_get_kvm_state(ICSState *ics);
 198 int ics_set_kvm_state_one(ICSState *ics, int srcno, Error **errp);
 199 int ics_set_kvm_state(ICSState *ics, Error **errp);
 200 void ics_synchronize_state(ICSState *ics);
 201 void ics_kvm_set_irq(ICSState *ics, int srcno, int val);
 202
 203 #endif /* XICS_H */