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13#include "qemu/osdep.h"
14#include "qapi/error.h"
15#include "hw/pci/pci.h"
16#include "hw/pci/pci_bus.h"
17#include "hw/pci/pci_host.h"
18#include "hw/qdev-properties.h"
19#include "hw/pci/pci_bridge.h"
20#include "qemu/range.h"
21#include "qemu/error-report.h"
22#include "qemu/module.h"
23#include "sysemu/numa.h"
24#include "hw/boards.h"
25#include "qom/object.h"
26
27#define TYPE_PXB_BUS "pxb-bus"
28typedef struct PXBBus PXBBus;
29DECLARE_INSTANCE_CHECKER(PXBBus, PXB_BUS,
30 TYPE_PXB_BUS)
31
32#define TYPE_PXB_PCIE_BUS "pxb-pcie-bus"
33DECLARE_INSTANCE_CHECKER(PXBBus, PXB_PCIE_BUS,
34 TYPE_PXB_PCIE_BUS)
35
36struct PXBBus {
37
38 PCIBus parent_obj;
39
40
41 char bus_path[8];
42};
43
44#define TYPE_PXB_DEVICE "pxb"
45typedef struct PXBDev PXBDev;
46DECLARE_INSTANCE_CHECKER(PXBDev, PXB_DEV,
47 TYPE_PXB_DEVICE)
48
49#define TYPE_PXB_PCIE_DEVICE "pxb-pcie"
50DECLARE_INSTANCE_CHECKER(PXBDev, PXB_PCIE_DEV,
51 TYPE_PXB_PCIE_DEVICE)
52
53struct PXBDev {
54
55 PCIDevice parent_obj;
56
57
58 uint8_t bus_nr;
59 uint16_t numa_node;
60 bool bypass_iommu;
61};
62
63static PXBDev *convert_to_pxb(PCIDevice *dev)
64{
65 return pci_bus_is_express(pci_get_bus(dev))
66 ? PXB_PCIE_DEV(dev) : PXB_DEV(dev);
67}
68
69static GList *pxb_dev_list;
70
71#define TYPE_PXB_HOST "pxb-host"
72
73static int pxb_bus_num(PCIBus *bus)
74{
75 PXBDev *pxb = convert_to_pxb(bus->parent_dev);
76
77 return pxb->bus_nr;
78}
79
80static uint16_t pxb_bus_numa_node(PCIBus *bus)
81{
82 PXBDev *pxb = convert_to_pxb(bus->parent_dev);
83
84 return pxb->numa_node;
85}
86
87static void pxb_bus_class_init(ObjectClass *class, void *data)
88{
89 PCIBusClass *pbc = PCI_BUS_CLASS(class);
90
91 pbc->bus_num = pxb_bus_num;
92 pbc->numa_node = pxb_bus_numa_node;
93}
94
95static const TypeInfo pxb_bus_info = {
96 .name = TYPE_PXB_BUS,
97 .parent = TYPE_PCI_BUS,
98 .instance_size = sizeof(PXBBus),
99 .class_init = pxb_bus_class_init,
100};
101
102static const TypeInfo pxb_pcie_bus_info = {
103 .name = TYPE_PXB_PCIE_BUS,
104 .parent = TYPE_PCIE_BUS,
105 .instance_size = sizeof(PXBBus),
106 .class_init = pxb_bus_class_init,
107};
108
109static const char *pxb_host_root_bus_path(PCIHostState *host_bridge,
110 PCIBus *rootbus)
111{
112 PXBBus *bus = pci_bus_is_express(rootbus) ?
113 PXB_PCIE_BUS(rootbus) : PXB_BUS(rootbus);
114
115 snprintf(bus->bus_path, 8, "0000:%02x", pxb_bus_num(rootbus));
116 return bus->bus_path;
117}
118
119static char *pxb_host_ofw_unit_address(const SysBusDevice *dev)
120{
121 const PCIHostState *pxb_host;
122 const PCIBus *pxb_bus;
123 const PXBDev *pxb_dev;
124 int position;
125 const DeviceState *pxb_dev_base;
126 const PCIHostState *main_host;
127 const SysBusDevice *main_host_sbd;
128
129 pxb_host = PCI_HOST_BRIDGE(dev);
130 pxb_bus = pxb_host->bus;
131 pxb_dev = convert_to_pxb(pxb_bus->parent_dev);
132 position = g_list_index(pxb_dev_list, pxb_dev);
133 assert(position >= 0);
134
135 pxb_dev_base = DEVICE(pxb_dev);
136 main_host = PCI_HOST_BRIDGE(pxb_dev_base->parent_bus->parent);
137 main_host_sbd = SYS_BUS_DEVICE(main_host);
138
139 if (main_host_sbd->num_mmio > 0) {
140 return g_strdup_printf(TARGET_FMT_plx ",%x",
141 main_host_sbd->mmio[0].addr, position + 1);
142 }
143 if (main_host_sbd->num_pio > 0) {
144 return g_strdup_printf("i%04x,%x",
145 main_host_sbd->pio[0], position + 1);
146 }
147 return NULL;
148}
149
150static void pxb_host_class_init(ObjectClass *class, void *data)
151{
152 DeviceClass *dc = DEVICE_CLASS(class);
153 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(class);
154 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(class);
155
156 dc->fw_name = "pci";
157
158 dc->user_creatable = false;
159 sbc->explicit_ofw_unit_address = pxb_host_ofw_unit_address;
160 hc->root_bus_path = pxb_host_root_bus_path;
161}
162
163static const TypeInfo pxb_host_info = {
164 .name = TYPE_PXB_HOST,
165 .parent = TYPE_PCI_HOST_BRIDGE,
166 .class_init = pxb_host_class_init,
167};
168
169
170
171
172static void pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus, Error **errp)
173{
174 PCIBus *bus = pci_get_bus(dev);
175 int pxb_bus_num = pci_bus_num(pxb_bus);
176
177 if (bus->parent_dev) {
178 error_setg(errp, "PXB devices can be attached only to root bus");
179 return;
180 }
181
182 QLIST_FOREACH(bus, &bus->child, sibling) {
183 if (pci_bus_num(bus) == pxb_bus_num) {
184 error_setg(errp, "Bus %d is already in use", pxb_bus_num);
185 return;
186 }
187 }
188 QLIST_INSERT_HEAD(&pci_get_bus(dev)->child, pxb_bus, sibling);
189}
190
191static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
192{
193 PCIDevice *pxb = pci_get_bus(pci_dev)->parent_dev;
194
195
196
197
198
199
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201
202
203
204
205
206 return pin - PCI_SLOT(pxb->devfn);
207}
208
209static gint pxb_compare(gconstpointer a, gconstpointer b)
210{
211 const PXBDev *pxb_a = a, *pxb_b = b;
212
213 return pxb_a->bus_nr < pxb_b->bus_nr ? -1 :
214 pxb_a->bus_nr > pxb_b->bus_nr ? 1 :
215 0;
216}
217
218static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
219{
220 PXBDev *pxb = convert_to_pxb(dev);
221 DeviceState *ds, *bds = NULL;
222 PCIBus *bus;
223 const char *dev_name = NULL;
224 Error *local_err = NULL;
225 MachineState *ms = MACHINE(qdev_get_machine());
226
227 if (ms->numa_state == NULL) {
228 error_setg(errp, "NUMA is not supported by this machine-type");
229 return;
230 }
231
232 if (pxb->numa_node != NUMA_NODE_UNASSIGNED &&
233 pxb->numa_node >= ms->numa_state->num_nodes) {
234 error_setg(errp, "Illegal numa node %d", pxb->numa_node);
235 return;
236 }
237
238 if (dev->qdev.id && *dev->qdev.id) {
239 dev_name = dev->qdev.id;
240 }
241
242 ds = qdev_new(TYPE_PXB_HOST);
243 if (pcie) {
244 bus = pci_root_bus_new(ds, dev_name, NULL, NULL, 0, TYPE_PXB_PCIE_BUS);
245 } else {
246 bus = pci_root_bus_new(ds, "pxb-internal", NULL, NULL, 0, TYPE_PXB_BUS);
247 bds = qdev_new("pci-bridge");
248 bds->id = g_strdup(dev_name);
249 qdev_prop_set_uint8(bds, PCI_BRIDGE_DEV_PROP_CHASSIS_NR, pxb->bus_nr);
250 qdev_prop_set_bit(bds, PCI_BRIDGE_DEV_PROP_SHPC, false);
251 }
252
253 bus->parent_dev = dev;
254 bus->address_space_mem = pci_get_bus(dev)->address_space_mem;
255 bus->address_space_io = pci_get_bus(dev)->address_space_io;
256 bus->map_irq = pxb_map_irq_fn;
257
258 PCI_HOST_BRIDGE(ds)->bus = bus;
259 PCI_HOST_BRIDGE(ds)->bypass_iommu = pxb->bypass_iommu;
260
261 pxb_register_bus(dev, bus, &local_err);
262 if (local_err) {
263 error_propagate(errp, local_err);
264 goto err_register_bus;
265 }
266
267 sysbus_realize_and_unref(SYS_BUS_DEVICE(ds), &error_fatal);
268 if (bds) {
269 qdev_realize_and_unref(bds, &bus->qbus, &error_fatal);
270 }
271
272 pci_word_test_and_set_mask(dev->config + PCI_STATUS,
273 PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK);
274 pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_HOST);
275
276 pxb_dev_list = g_list_insert_sorted(pxb_dev_list, pxb, pxb_compare);
277 return;
278
279err_register_bus:
280 object_unref(OBJECT(bds));
281 object_unparent(OBJECT(bus));
282 object_unref(OBJECT(ds));
283}
284
285static void pxb_dev_realize(PCIDevice *dev, Error **errp)
286{
287 if (pci_bus_is_express(pci_get_bus(dev))) {
288 error_setg(errp, "pxb devices cannot reside on a PCIe bus");
289 return;
290 }
291
292 pxb_dev_realize_common(dev, false, errp);
293}
294
295static void pxb_dev_exitfn(PCIDevice *pci_dev)
296{
297 PXBDev *pxb = convert_to_pxb(pci_dev);
298
299 pxb_dev_list = g_list_remove(pxb_dev_list, pxb);
300}
301
302static Property pxb_dev_properties[] = {
303
304 DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
305 DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
306 DEFINE_PROP_BOOL("bypass_iommu", PXBDev, bypass_iommu, false),
307 DEFINE_PROP_END_OF_LIST(),
308};
309
310static void pxb_dev_class_init(ObjectClass *klass, void *data)
311{
312 DeviceClass *dc = DEVICE_CLASS(klass);
313 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
314
315 k->realize = pxb_dev_realize;
316 k->exit = pxb_dev_exitfn;
317 k->vendor_id = PCI_VENDOR_ID_REDHAT;
318 k->device_id = PCI_DEVICE_ID_REDHAT_PXB;
319 k->class_id = PCI_CLASS_BRIDGE_HOST;
320
321 dc->desc = "PCI Expander Bridge";
322 device_class_set_props(dc, pxb_dev_properties);
323 dc->hotpluggable = false;
324 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
325}
326
327static const TypeInfo pxb_dev_info = {
328 .name = TYPE_PXB_DEVICE,
329 .parent = TYPE_PCI_DEVICE,
330 .instance_size = sizeof(PXBDev),
331 .class_init = pxb_dev_class_init,
332 .interfaces = (InterfaceInfo[]) {
333 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
334 { },
335 },
336};
337
338static void pxb_pcie_dev_realize(PCIDevice *dev, Error **errp)
339{
340 if (!pci_bus_is_express(pci_get_bus(dev))) {
341 error_setg(errp, "pxb-pcie devices cannot reside on a PCI bus");
342 return;
343 }
344
345 pxb_dev_realize_common(dev, true, errp);
346}
347
348static void pxb_pcie_dev_class_init(ObjectClass *klass, void *data)
349{
350 DeviceClass *dc = DEVICE_CLASS(klass);
351 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
352
353 k->realize = pxb_pcie_dev_realize;
354 k->exit = pxb_dev_exitfn;
355 k->vendor_id = PCI_VENDOR_ID_REDHAT;
356 k->device_id = PCI_DEVICE_ID_REDHAT_PXB_PCIE;
357 k->class_id = PCI_CLASS_BRIDGE_HOST;
358
359 dc->desc = "PCI Express Expander Bridge";
360 device_class_set_props(dc, pxb_dev_properties);
361 dc->hotpluggable = false;
362 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
363}
364
365static const TypeInfo pxb_pcie_dev_info = {
366 .name = TYPE_PXB_PCIE_DEVICE,
367 .parent = TYPE_PCI_DEVICE,
368 .instance_size = sizeof(PXBDev),
369 .class_init = pxb_pcie_dev_class_init,
370 .interfaces = (InterfaceInfo[]) {
371 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
372 { },
373 },
374};
375
376static void pxb_register_types(void)
377{
378 type_register_static(&pxb_bus_info);
379 type_register_static(&pxb_pcie_bus_info);
380 type_register_static(&pxb_host_info);
381 type_register_static(&pxb_dev_info);
382 type_register_static(&pxb_pcie_dev_info);
383}
384
385type_init(pxb_register_types)
386
