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 
28 #define PCI_DEVICE_ID_TI_XIO3130U       0x8232  /* upstream port */
29 #define XIO3130_REVISION                0x2
30 #define XIO3130_MSI_OFFSET              0x70
31 #define XIO3130_MSI_SUPPORTED_FLAGS     PCI_MSI_FLAGS_64BIT
32 #define XIO3130_MSI_NR_VECTOR           1
33 #define XIO3130_SSVID_OFFSET            0x80
34 #define XIO3130_SSVID_SVID              0
35 #define XIO3130_SSVID_SSID              0
36 #define XIO3130_EXP_OFFSET              0x90
37 #define XIO3130_AER_OFFSET              0x100
38 
39 static void xio3130_upstream_write_config(PCIDevice *d, uint32_t address,
40                                           uint32_t val, int len)
41 {
42     pci_bridge_write_config(d, address, val, len);
43     pcie_cap_flr_write_config(d, address, val, len);
44     pcie_aer_write_config(d, address, val, len);
45 }
46 
47 static void xio3130_upstream_reset(DeviceState *qdev)
48 {
49     PCIDevice *d = PCI_DEVICE(qdev);
50 
51     pci_bridge_reset(qdev);
52     pcie_cap_deverr_reset(d);
53 }
54 
55 static void xio3130_upstream_realize(PCIDevice *d, Error **errp)
56 {
57     PCIEPort *p = PCIE_PORT(d);
58     int rc;
59 
60     pci_bridge_initfn(d, TYPE_PCIE_BUS);
61     pcie_port_init_reg(d);
62 
63     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
64                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
65                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
66                   errp);
67     if (rc < 0) {
68         assert(rc == -ENOTSUP);
69         goto err_bridge;
70     }
71 
72     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
73                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
74                                errp);
75     if (rc < 0) {
76         goto err_bridge;
77     }
78 
79     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
80                        p->port, errp);
81     if (rc < 0) {
82         goto err_msi;
83     }
84     pcie_cap_flr_init(d);
85     pcie_cap_deverr_init(d);
86 
87     rc = pcie_aer_init(d, PCI_ERR_VER, XIO3130_AER_OFFSET,
88                        PCI_ERR_SIZEOF, errp);
89     if (rc < 0) {
90         goto err;
91     }
92 
93     return;
94 
95 err:
96     pcie_cap_exit(d);
97 err_msi:
98     msi_uninit(d);
99 err_bridge:
100     pci_bridge_exitfn(d);
101 }
102 
103 static void xio3130_upstream_exitfn(PCIDevice *d)
104 {
105     pcie_aer_exit(d);
106     pcie_cap_exit(d);
107     msi_uninit(d);
108     pci_bridge_exitfn(d);
109 }
110 
111 static const VMStateDescription vmstate_xio3130_upstream = {
112     .name = "xio3130-express-upstream-port",
113     .priority = MIG_PRI_PCI_BUS,
114     .version_id = 1,
115     .minimum_version_id = 1,
116     .fields = (VMStateField[]) {
117         VMSTATE_PCI_DEVICE(parent_obj.parent_obj, PCIEPort),
118         VMSTATE_STRUCT(parent_obj.parent_obj.exp.aer_log, PCIEPort, 0,
119                        vmstate_pcie_aer_log, PCIEAERLog),
120         VMSTATE_END_OF_LIST()
121     }
122 };
123 
124 static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
125 {
126     DeviceClass *dc = DEVICE_CLASS(klass);
127     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
128 
129     k->is_bridge = true;
130     k->config_write = xio3130_upstream_write_config;
131     k->realize = xio3130_upstream_realize;
132     k->exit = xio3130_upstream_exitfn;
133     k->vendor_id = PCI_VENDOR_ID_TI;
134     k->device_id = PCI_DEVICE_ID_TI_XIO3130U;
135     k->revision = XIO3130_REVISION;
136     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
137     dc->desc = "TI X3130 Upstream Port of PCI Express Switch";
138     dc->reset = xio3130_upstream_reset;
139     dc->vmsd = &vmstate_xio3130_upstream;
140 }
141 
142 static const TypeInfo xio3130_upstream_info = {
143     .name          = "x3130-upstream",
144     .parent        = TYPE_PCIE_PORT,
145     .class_init    = xio3130_upstream_class_init,
146     .interfaces = (InterfaceInfo[]) {
147         { INTERFACE_PCIE_DEVICE },
148         { }
149     },
150 };
151 
152 static void xio3130_upstream_register_types(void)
153 {
154     type_register_static(&xio3130_upstream_info);
155 }
156 
157 type_init(xio3130_upstream_register_types)
158