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1.1 root 1: /*
2: * QEMU PCI hotplug support
3: *
4: * Copyright (c) 2004 Fabrice Bellard
5: *
6: * Permission is hereby granted, free of charge, to any person obtaining a copy
7: * of this software and associated documentation files (the "Software"), to deal
8: * in the Software without restriction, including without limitation the rights
9: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10: * copies of the Software, and to permit persons to whom the Software is
11: * furnished to do so, subject to the following conditions:
12: *
13: * The above copyright notice and this permission notice shall be included in
14: * all copies or substantial portions of the Software.
15: *
16: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22: * THE SOFTWARE.
23: */
24:
25: #include "hw.h"
26: #include "boards.h"
27: #include "pci.h"
28: #include "net.h"
29: #include "sysemu.h"
30: #include "pc.h"
31: #include "console.h"
32: #include "block_int.h"
33: #include "virtio-blk.h"
34:
35: #if defined(TARGET_I386) || defined(TARGET_X86_64)
36: static PCIDevice *qemu_pci_hot_add_nic(PCIBus *pci_bus, const char *opts)
37: {
38: int ret;
39:
40: ret = net_client_init ("nic", opts);
41: if (ret < 0 || !nd_table[ret].model)
42: return NULL;
43: return pci_nic_init (pci_bus, &nd_table[ret], -1, "rtl8139");
44: }
45:
46: void drive_hot_add(const char *pci_addr, const char *opts)
47: {
48: int dom, pci_bus;
49: unsigned slot;
50: int drive_idx, type, bus;
51: int success = 0;
52: PCIDevice *dev;
53:
54: if (pci_read_devaddr(pci_addr, &dom, &pci_bus, &slot)) {
55: term_printf("Invalid pci address\n");
56: return;
57: }
58:
59: dev = pci_find_device(pci_bus, slot, 0);
60: if (!dev) {
61: term_printf("no pci device with address %s\n", pci_addr);
62: return;
63: }
64:
65: drive_idx = add_init_drive(opts);
66: if (drive_idx < 0)
67: return;
68: type = drives_table[drive_idx].type;
69: bus = drive_get_max_bus (type);
70:
71: switch (type) {
72: case IF_SCSI:
73: success = 1;
74: lsi_scsi_attach (dev, drives_table[drive_idx].bdrv,
75: drives_table[drive_idx].unit);
76: break;
77: default:
78: term_printf("Can't hot-add drive to type %d\n", type);
79: }
80:
81: if (success)
82: term_printf("OK bus %d, unit %d\n", drives_table[drive_idx].bus,
83: drives_table[drive_idx].unit);
84: return;
85: }
86:
87: static PCIDevice *qemu_pci_hot_add_storage(PCIBus *pci_bus, const char *opts)
88: {
89: void *opaque = NULL;
90: int type = -1, drive_idx = -1;
91: char buf[128];
92:
93: if (get_param_value(buf, sizeof(buf), "if", opts)) {
94: if (!strcmp(buf, "scsi"))
95: type = IF_SCSI;
96: else if (!strcmp(buf, "virtio")) {
97: type = IF_VIRTIO;
98: }
99: } else {
100: term_printf("no if= specified\n");
101: return NULL;
102: }
103:
104: if (get_param_value(buf, sizeof(buf), "file", opts)) {
105: drive_idx = add_init_drive(opts);
106: if (drive_idx < 0)
107: return NULL;
108: } else if (type == IF_VIRTIO) {
109: term_printf("virtio requires a backing file/device.\n");
110: return NULL;
111: }
112:
113: switch (type) {
114: case IF_SCSI:
115: opaque = lsi_scsi_init (pci_bus, -1);
116: if (opaque && drive_idx >= 0)
117: lsi_scsi_attach (opaque, drives_table[drive_idx].bdrv,
118: drives_table[drive_idx].unit);
119: break;
120: case IF_VIRTIO:
121: opaque = virtio_blk_init (pci_bus, drives_table[drive_idx].bdrv);
122: break;
123: default:
124: term_printf ("type %s not a hotpluggable PCI device.\n", buf);
125: }
126:
127: return opaque;
128: }
129:
130: void pci_device_hot_add(const char *pci_addr, const char *type, const char *opts)
131: {
132: PCIDevice *dev = NULL;
133: PCIBus *pci_bus;
134: int dom, bus;
135: unsigned slot;
136:
137: if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
138: term_printf("Invalid pci address\n");
139: return;
140: }
141:
142: pci_bus = pci_find_bus(bus);
143: if (!pci_bus) {
144: term_printf("Can't find pci_bus %d\n", bus);
145: return;
146: }
147:
148: if (strcmp(type, "nic") == 0)
149: dev = qemu_pci_hot_add_nic(pci_bus, opts);
150: else if (strcmp(type, "storage") == 0)
151: dev = qemu_pci_hot_add_storage(pci_bus, opts);
152: else
153: term_printf("invalid type: %s\n", type);
154:
155: if (dev) {
156: qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
157: term_printf("OK domain %d, bus %d, slot %d, function %d\n",
158: 0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
159: PCI_FUNC(dev->devfn));
160: } else
161: term_printf("failed to add %s\n", opts);
162: }
163: #endif
164:
165: void pci_device_hot_remove(const char *pci_addr)
166: {
167: PCIDevice *d;
168: int dom, bus;
169: unsigned slot;
170:
171: if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
172: term_printf("Invalid pci address\n");
173: return;
174: }
175:
176: d = pci_find_device(bus, slot, 0);
177: if (!d) {
178: term_printf("slot %d empty\n", slot);
179: return;
180: }
181:
182: qemu_system_device_hot_add(bus, slot, 0);
183: }
184:
185: static int pci_match_fn(void *dev_private, void *arg)
186: {
187: PCIDevice *dev = dev_private;
188: PCIDevice *match = arg;
189:
190: return (dev == match);
191: }
192:
193: /*
194: * OS has executed _EJ0 method, we now can remove the device
195: */
196: void pci_device_hot_remove_success(int pcibus, int slot)
197: {
198: PCIDevice *d = pci_find_device(pcibus, slot, 0);
199: int class_code;
200:
201: if (!d) {
202: term_printf("invalid slot %d\n", slot);
203: return;
204: }
205:
206: class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
207:
208: switch(class_code) {
209: case PCI_BASE_CLASS_STORAGE:
210: destroy_bdrvs(pci_match_fn, d);
211: break;
212: case PCI_BASE_CLASS_NETWORK:
213: destroy_nic(pci_match_fn, d);
214: break;
215: }
216:
217: pci_unregister_device(d);
218: }
219:
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