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Annotation of qemu/hw/pci-hotplug.c, revision 1.1

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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