1 /*
2  * xio3130_upstream.c
3  * TI X3130 pci express upstream port switch
4  *
5  * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
6  *                    VA Linux Systems Japan K.K.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, see <http://www.gnu.org/licenses/>.
20  */
21 
22 #include "qemu/osdep.h"
23 #include "hw/pci/pci_ids.h"
24 #include "hw/pci/msi.h"
25 #include "hw/pci/pcie.h"
26 #include "hw/pci/pcie_port.h"
27 #include "migration/vmstate.h"
28 #include "qemu/module.h"
29 
30 #define PCI_DEVICE_ID_TI_XIO3130U       0x8232  /* upstream port */
31 #define XIO3130_REVISION                0x2
32 #define XIO3130_MSI_OFFSET              0x70
33 #define XIO3130_MSI_SUPPORTED_FLAGS     PCI_MSI_FLAGS_64BIT
34 #define XIO3130_MSI_NR_VECTOR           1
35 #define XIO3130_SSVID_OFFSET            0x80
36 #define XIO3130_SSVID_SVID              0
37 #define XIO3130_SSVID_SSID              0
38 #define XIO3130_EXP_OFFSET              0x90
39 #define XIO3130_AER_OFFSET              0x100
40 
41 static void xio3130_upstream_write_config(PCIDevice *d, uint32_t address,
42                                           uint32_t val, int len)
43 {
44     pci_bridge_write_config(d, address, val, len);
45     pcie_cap_flr_write_config(d, address, val, len);
46     pcie_aer_write_config(d, address, val, len);
47 }
48 
49 static void xio3130_upstream_reset(DeviceState *qdev)
50 {
51     PCIDevice *d = PCI_DEVICE(qdev);
52 
53     pci_bridge_reset(qdev);
54     pcie_cap_deverr_reset(d);
55 }
56 
57 static void xio3130_upstream_realize(PCIDevice *d, Error **errp)
58 {
59     PCIEPort *p = PCIE_PORT(d);
60     int rc;
61 
62     pci_bridge_initfn(d, TYPE_PCIE_BUS);
63     pcie_port_init_reg(d);
64 
65     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
66                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
67                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
68                   errp);
69     if (rc < 0) {
70         assert(rc == -ENOTSUP);
71         goto err_bridge;
72     }
73 
74     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
75                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
76                                errp);
77     if (rc < 0) {
78         goto err_msi;
79     }
80 
81     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
82                        p->port, errp);
83     if (rc < 0) {
84         goto err_msi;
85     }
86     pcie_cap_flr_init(d);
87     pcie_cap_deverr_init(d);
88 
89     rc = pcie_aer_init(d, PCI_ERR_VER, XIO3130_AER_OFFSET,
90                        PCI_ERR_SIZEOF, errp);
91     if (rc < 0) {
92         goto err;
93     }
94 
95     return;
96 
97 err:
98     pcie_cap_exit(d);
99 err_msi:
100     msi_uninit(d);
101 err_bridge:
102     pci_bridge_exitfn(d);
103 }
104 
105 static void xio3130_upstream_exitfn(PCIDevice *d)
106 {
107     pcie_aer_exit(d);
108     pcie_cap_exit(d);
109     msi_uninit(d);
110     pci_bridge_exitfn(d);
111 }
112 
113 static const VMStateDescription vmstate_xio3130_upstream = {
114     .name = "xio3130-express-upstream-port",
115     .priority = MIG_PRI_PCI_BUS,
116     .version_id = 1,
117     .minimum_version_id = 1,
118     .fields = (const VMStateField[]) {
119         VMSTATE_PCI_DEVICE(parent_obj.parent_obj, PCIEPort),
120         VMSTATE_STRUCT(parent_obj.parent_obj.exp.aer_log, PCIEPort, 0,
121                        vmstate_pcie_aer_log, PCIEAERLog),
122         VMSTATE_END_OF_LIST()
123     }
124 };
125 
126 static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
127 {
128     DeviceClass *dc = DEVICE_CLASS(klass);
129     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
130 
131     k->config_write = xio3130_upstream_write_config;
132     k->realize = xio3130_upstream_realize;
133     k->exit = xio3130_upstream_exitfn;
134     k->vendor_id = PCI_VENDOR_ID_TI;
135     k->device_id = PCI_DEVICE_ID_TI_XIO3130U;
136     k->revision = XIO3130_REVISION;
137     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
138     dc->desc = "TI X3130 Upstream Port of PCI Express Switch";
139     device_class_set_legacy_reset(dc, xio3130_upstream_reset);
140     dc->vmsd = &vmstate_xio3130_upstream;
141 }
142 
143 static const TypeInfo xio3130_upstream_info = {
144     .name          = "x3130-upstream",
145     .parent        = TYPE_PCIE_PORT,
146     .class_init    = xio3130_upstream_class_init,
147     .interfaces = (InterfaceInfo[]) {
148         { INTERFACE_PCIE_DEVICE },
149         { }
150     },
151 };
152 
153 static void xio3130_upstream_register_types(void)
154 {
155     type_register_static(&xio3130_upstream_info);
156 }
157 
158 type_init(xio3130_upstream_register_types)
159