xref: /openbmc/qemu/include/hw/pci/pcie.h (revision ad66b5cb)
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/pci/pci_regs.h"
25 #include "hw/pci/pcie_regs.h"
26 #include "hw/pci/pcie_aer.h"
27 #include "hw/pci/pcie_sriov.h"
28 #include "hw/hotplug.h"
29 
30 typedef enum {
31     /* these bits must match the bits in Slot Control/Status registers.
32      * PCI_EXP_HP_EV_xxx = PCI_EXP_SLTCTL_xxxE = PCI_EXP_SLTSTA_xxx
33      *
34      * Not all the bits of slot control register match with the ones of
35      * slot status. Not some bits of slot status register is used to
36      * show status, not to report event occurrence.
37      * So such bits must be masked out when checking the software
38      * notification condition.
39      */
40     PCI_EXP_HP_EV_ABP           = PCI_EXP_SLTCTL_ABPE,
41                                         /* attention button pressed */
42     PCI_EXP_HP_EV_PDC           = PCI_EXP_SLTCTL_PDCE,
43                                         /* presence detect changed */
44     PCI_EXP_HP_EV_CCI           = PCI_EXP_SLTCTL_CCIE,
45                                         /* command completed */
46 
47     PCI_EXP_HP_EV_SUPPORTED     = PCI_EXP_HP_EV_ABP |
48                                   PCI_EXP_HP_EV_PDC |
49                                   PCI_EXP_HP_EV_CCI,
50                                                 /* supported event mask  */
51 
52     /* events not listed aren't supported */
53 } PCIExpressHotPlugEvent;
54 
55 struct PCIExpressDevice {
56     /* Offset of express capability in config space */
57     uint8_t exp_cap;
58     /* Offset of Power Management capability in config space */
59     uint8_t pm_cap;
60 
61     /* SLOT */
62     bool hpev_notified; /* Logical AND of conditions for hot plug event.
63                          Following 6.7.3.4:
64                          Software Notification of Hot-Plug Events, an interrupt
65                          is sent whenever the logical and of these conditions
66                          transitions from false to true. */
67 
68     /* AER */
69     uint16_t aer_cap;
70     PCIEAERLog aer_log;
71 
72     /* Offset of ATS capability in config space */
73     uint16_t ats_cap;
74 
75     /* ACS */
76     uint16_t acs_cap;
77 
78     /* SR/IOV */
79     uint16_t sriov_cap;
80     PCIESriovPF sriov_pf;
81     PCIESriovVF sriov_vf;
82 };
83 
84 #define COMPAT_PROP_PCP "power_controller_present"
85 
86 /* PCI express capability helper functions */
87 int pcie_cap_init(PCIDevice *dev, uint8_t offset, uint8_t type,
88                   uint8_t port, Error **errp);
89 int pcie_cap_v1_init(PCIDevice *dev, uint8_t offset,
90                      uint8_t type, uint8_t port);
91 int pcie_endpoint_cap_init(PCIDevice *dev, uint8_t offset);
92 void pcie_cap_exit(PCIDevice *dev);
93 int pcie_endpoint_cap_v1_init(PCIDevice *dev, uint8_t offset);
94 void pcie_cap_v1_exit(PCIDevice *dev);
95 uint8_t pcie_cap_get_type(const PCIDevice *dev);
96 void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector);
97 uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);
98 
99 void pcie_cap_deverr_init(PCIDevice *dev);
100 void pcie_cap_deverr_reset(PCIDevice *dev);
101 
102 void pcie_cap_lnkctl_init(PCIDevice *dev);
103 void pcie_cap_lnkctl_reset(PCIDevice *dev);
104 
105 void pcie_cap_slot_init(PCIDevice *dev, PCIESlot *s);
106 void pcie_cap_slot_reset(PCIDevice *dev);
107 void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slt_ctl, uint16_t *slt_sta);
108 void pcie_cap_slot_write_config(PCIDevice *dev,
109                                 uint16_t old_slt_ctl, uint16_t old_slt_sta,
110                                 uint32_t addr, uint32_t val, int len);
111 int pcie_cap_slot_post_load(void *opaque, int version_id);
112 void pcie_cap_slot_push_attention_button(PCIDevice *dev);
113 void pcie_cap_slot_enable_power(PCIDevice *dev);
114 
115 void pcie_cap_root_init(PCIDevice *dev);
116 void pcie_cap_root_reset(PCIDevice *dev);
117 
118 void pcie_cap_flr_init(PCIDevice *dev);
119 void pcie_cap_flr_write_config(PCIDevice *dev,
120                            uint32_t addr, uint32_t val, int len);
121 
122 /* ARI forwarding capability and control */
123 void pcie_cap_arifwd_init(PCIDevice *dev);
124 void pcie_cap_arifwd_reset(PCIDevice *dev);
125 bool pcie_cap_is_arifwd_enabled(const PCIDevice *dev);
126 
127 /* PCI express extended capability helper functions */
128 uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id);
129 void pcie_add_capability(PCIDevice *dev,
130                          uint16_t cap_id, uint8_t cap_ver,
131                          uint16_t offset, uint16_t size);
132 void pcie_sync_bridge_lnk(PCIDevice *dev);
133 
134 void pcie_acs_init(PCIDevice *dev, uint16_t offset);
135 void pcie_acs_reset(PCIDevice *dev);
136 
137 void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn);
138 void pcie_dev_ser_num_init(PCIDevice *dev, uint16_t offset, uint64_t ser_num);
139 void pcie_ats_init(PCIDevice *dev, uint16_t offset, bool aligned);
140 
141 void pcie_cap_slot_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
142                                Error **errp);
143 void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
144                            Error **errp);
145 void pcie_cap_slot_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
146                              Error **errp);
147 void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
148                                      DeviceState *dev, Error **errp);
149 #endif /* QEMU_PCIE_H */
150