include/hw/pci/pcie.h

   1 /*
   2  * pcie.h
   3  *
   4  * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
   5  *                    VA Linux Systems Japan K.K.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef QEMU_PCIE_H
  22 #define QEMU_PCIE_H
  23
  24 #include "hw/hw.h"
  25 #include "hw/pci/pci_regs.h"
  26 #include "hw/pci/pcie_regs.h"
  27 #include "hw/pci/pcie_aer.h"
  28 #include "hw/hotplug.h"
  29
  30 typedef enum {
  31     /* for attention and power indicator */
  32     PCI_EXP_HP_IND_RESERVED     = PCI_EXP_SLTCTL_IND_RESERVED,
  33     PCI_EXP_HP_IND_ON           = PCI_EXP_SLTCTL_IND_ON,
  34     PCI_EXP_HP_IND_BLINK        = PCI_EXP_SLTCTL_IND_BLINK,
  35     PCI_EXP_HP_IND_OFF          = PCI_EXP_SLTCTL_IND_OFF,
  36 } PCIExpressIndicator;
  37
  38 typedef enum {
  39     /* these bits must match the bits in Slot Control/Status registers.
  40      * PCI_EXP_HP_EV_xxx = PCI_EXP_SLTCTL_xxxE = PCI_EXP_SLTSTA_xxx
  41      *
  42      * Not all the bits of slot control register match with the ones of
  43      * slot status. Not some bits of slot status register is used to
  44      * show status, not to report event occurrence.
  45      * So such bits must be masked out when checking the software
  46      * notification condition.
  47      */
  48     PCI_EXP_HP_EV_ABP           = PCI_EXP_SLTCTL_ABPE,
  49                                         /* attention button pressed */
  50     PCI_EXP_HP_EV_PDC           = PCI_EXP_SLTCTL_PDCE,
  51                                         /* presence detect changed */
  52     PCI_EXP_HP_EV_CCI           = PCI_EXP_SLTCTL_CCIE,
  53                                         /* command completed */
  54
  55     PCI_EXP_HP_EV_SUPPORTED     = PCI_EXP_HP_EV_ABP |
  56                                   PCI_EXP_HP_EV_PDC |
  57                                   PCI_EXP_HP_EV_CCI,
  58                                                 /* supported event mask  */
  59
  60     /* events not listed aren't supported */
  61 } PCIExpressHotPlugEvent;
  62
  63 struct PCIExpressDevice {
  64     /* Offset of express capability in config space */
  65     uint8_t exp_cap;
  66
  67     /* SLOT */
  68     bool hpev_notified; /* Logical AND of conditions for hot plug event.
  69                          Following 6.7.3.4:
  70                          Software Notification of Hot-Plug Events, an interrupt
  71                          is sent whenever the logical and of these conditions
  72                          transitions from false to true. */
  73
  74     /* AER */
  75     uint16_t aer_cap;
  76     PCIEAERLog aer_log;
  77 };
  78
  79 #define COMPAT_PROP_PCP "power_controller_present"
  80
  81 /* PCI express capability helper functions */
  82 int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type, uint8_t port);
  83 int pcie_endpoint_cap_init(PCIDevice *dev, uint8_t offset);
  84 void pcie_cap_exit(PCIDevice *dev);
  85 uint8_t pcie_cap_get_type(const PCIDevice *dev);
  86 void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector);
  87 uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);
  88
  89 void pcie_cap_deverr_init(PCIDevice *dev);
  90 void pcie_cap_deverr_reset(PCIDevice *dev);
  91
  92 void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot);
  93 void pcie_cap_slot_reset(PCIDevice *dev);
  94 void pcie_cap_slot_write_config(PCIDevice *dev,
  95                                 uint32_t addr, uint32_t val, int len);
  96 int pcie_cap_slot_post_load(void *opaque, int version_id);
  97 void pcie_cap_slot_push_attention_button(PCIDevice *dev);
  98
  99 void pcie_cap_root_init(PCIDevice *dev);
 100 void pcie_cap_root_reset(PCIDevice *dev);
 101
 102 void pcie_cap_flr_init(PCIDevice *dev);
 103 void pcie_cap_flr_write_config(PCIDevice *dev,
 104                            uint32_t addr, uint32_t val, int len);
 105
 106 /* ARI forwarding capability and control */
 107 void pcie_cap_arifwd_init(PCIDevice *dev);
 108 void pcie_cap_arifwd_reset(PCIDevice *dev);
 109 bool pcie_cap_is_arifwd_enabled(const PCIDevice *dev);
 110
 111 /* PCI express extended capability helper functions */
 112 uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id);
 113 void pcie_add_capability(PCIDevice *dev,
 114                          uint16_t cap_id, uint8_t cap_ver,
 115                          uint16_t offset, uint16_t size);
 116
 117 void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn);
 118
 119 extern const VMStateDescription vmstate_pcie_device;
 120
 121 #define VMSTATE_PCIE_DEVICE(_field, _state) {                        \
 122     .name       = (stringify(_field)),                               \
 123     .size       = sizeof(PCIDevice),                                 \
 124     .vmsd       = &vmstate_pcie_device,                              \
 125     .flags      = VMS_STRUCT,                                        \
 126     .offset     = vmstate_offset_value(_state, _field, PCIDevice),   \
 127 }
 128
 129 void pcie_cap_slot_hotplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
 130                               Error **errp);
 131 void pcie_cap_slot_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
 132                                          DeviceState *dev, Error **errp);
 133 #endif /* QEMU_PCIE_H */