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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;
1.1.1.2 ! root 98: } else {
! 99: term_printf("type %s not a hotpluggable PCI device.\n", buf);
! 100: goto out;
1.1 root 101: }
102: } else {
103: term_printf("no if= specified\n");
1.1.1.2 ! root 104: goto out;
1.1 root 105: }
106:
107: if (get_param_value(buf, sizeof(buf), "file", opts)) {
108: drive_idx = add_init_drive(opts);
109: if (drive_idx < 0)
1.1.1.2 ! root 110: goto out;
1.1 root 111: } else if (type == IF_VIRTIO) {
112: term_printf("virtio requires a backing file/device.\n");
1.1.1.2 ! root 113: goto out;
1.1 root 114: }
115:
116: switch (type) {
117: case IF_SCSI:
118: opaque = lsi_scsi_init (pci_bus, -1);
119: if (opaque && drive_idx >= 0)
120: lsi_scsi_attach (opaque, drives_table[drive_idx].bdrv,
121: drives_table[drive_idx].unit);
122: break;
123: case IF_VIRTIO:
124: opaque = virtio_blk_init (pci_bus, drives_table[drive_idx].bdrv);
125: break;
126: }
127:
1.1.1.2 ! root 128: out:
1.1 root 129: return opaque;
130: }
131:
132: void pci_device_hot_add(const char *pci_addr, const char *type, const char *opts)
133: {
134: PCIDevice *dev = NULL;
135: PCIBus *pci_bus;
136: int dom, bus;
137: unsigned slot;
138:
139: if (pci_assign_devaddr(pci_addr, &dom, &bus, &slot)) {
140: term_printf("Invalid pci address\n");
141: return;
142: }
143:
144: pci_bus = pci_find_bus(bus);
145: if (!pci_bus) {
146: term_printf("Can't find pci_bus %d\n", bus);
147: return;
148: }
149:
150: if (strcmp(type, "nic") == 0)
151: dev = qemu_pci_hot_add_nic(pci_bus, opts);
152: else if (strcmp(type, "storage") == 0)
153: dev = qemu_pci_hot_add_storage(pci_bus, opts);
154: else
155: term_printf("invalid type: %s\n", type);
156:
157: if (dev) {
158: qemu_system_device_hot_add(bus, PCI_SLOT(dev->devfn), 1);
159: term_printf("OK domain %d, bus %d, slot %d, function %d\n",
160: 0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
161: PCI_FUNC(dev->devfn));
162: } else
163: term_printf("failed to add %s\n", opts);
164: }
165: #endif
166:
167: void pci_device_hot_remove(const char *pci_addr)
168: {
169: PCIDevice *d;
170: int dom, bus;
171: unsigned slot;
172:
173: if (pci_read_devaddr(pci_addr, &dom, &bus, &slot)) {
174: term_printf("Invalid pci address\n");
175: return;
176: }
177:
178: d = pci_find_device(bus, slot, 0);
179: if (!d) {
180: term_printf("slot %d empty\n", slot);
181: return;
182: }
183:
184: qemu_system_device_hot_add(bus, slot, 0);
185: }
186:
187: static int pci_match_fn(void *dev_private, void *arg)
188: {
189: PCIDevice *dev = dev_private;
190: PCIDevice *match = arg;
191:
192: return (dev == match);
193: }
194:
195: /*
196: * OS has executed _EJ0 method, we now can remove the device
197: */
198: void pci_device_hot_remove_success(int pcibus, int slot)
199: {
200: PCIDevice *d = pci_find_device(pcibus, slot, 0);
201: int class_code;
202:
203: if (!d) {
204: term_printf("invalid slot %d\n", slot);
205: return;
206: }
207:
208: class_code = d->config_read(d, PCI_CLASS_DEVICE+1, 1);
209:
210: switch(class_code) {
211: case PCI_BASE_CLASS_STORAGE:
212: destroy_bdrvs(pci_match_fn, d);
213: break;
214: case PCI_BASE_CLASS_NETWORK:
215: destroy_nic(pci_match_fn, d);
216: break;
217: }
218:
219: pci_unregister_device(d);
220: }
221:
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