1 /* 2 * QEMU IDE Emulation: PCI PIIX3/4 support. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/pci/pci.h" 28 #include "migration/vmstate.h" 29 #include "qemu/module.h" 30 #include "sysemu/block-backend.h" 31 #include "sysemu/blockdev.h" 32 #include "sysemu/dma.h" 33 #include "sysemu/reset.h" 34 35 #include "hw/ide/pci.h" 36 #include "trace.h" 37 38 static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size) 39 { 40 BMDMAState *bm = opaque; 41 uint32_t val; 42 43 if (size != 1) { 44 return ((uint64_t)1 << (size * 8)) - 1; 45 } 46 47 switch(addr & 3) { 48 case 0: 49 val = bm->cmd; 50 break; 51 case 2: 52 val = bm->status; 53 break; 54 default: 55 val = 0xff; 56 break; 57 } 58 59 trace_bmdma_read(addr, val); 60 return val; 61 } 62 63 static void bmdma_write(void *opaque, hwaddr addr, 64 uint64_t val, unsigned size) 65 { 66 BMDMAState *bm = opaque; 67 68 if (size != 1) { 69 return; 70 } 71 72 trace_bmdma_write(addr, val); 73 74 switch(addr & 3) { 75 case 0: 76 bmdma_cmd_writeb(bm, val); 77 break; 78 case 2: 79 bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06); 80 break; 81 } 82 } 83 84 static const MemoryRegionOps piix_bmdma_ops = { 85 .read = bmdma_read, 86 .write = bmdma_write, 87 }; 88 89 static void bmdma_setup_bar(PCIIDEState *d) 90 { 91 int i; 92 93 memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16); 94 for(i = 0;i < 2; i++) { 95 BMDMAState *bm = &d->bmdma[i]; 96 97 memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm, 98 "piix-bmdma", 4); 99 memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io); 100 memory_region_init_io(&bm->addr_ioport, OBJECT(d), 101 &bmdma_addr_ioport_ops, bm, "bmdma", 4); 102 memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport); 103 } 104 } 105 106 static void piix3_reset(void *opaque) 107 { 108 PCIIDEState *d = opaque; 109 PCIDevice *pd = PCI_DEVICE(d); 110 uint8_t *pci_conf = pd->config; 111 int i; 112 113 for (i = 0; i < 2; i++) { 114 ide_bus_reset(&d->bus[i]); 115 } 116 117 /* TODO: this is the default. do not override. */ 118 pci_conf[PCI_COMMAND] = 0x00; 119 /* TODO: this is the default. do not override. */ 120 pci_conf[PCI_COMMAND + 1] = 0x00; 121 /* TODO: use pci_set_word */ 122 pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK; 123 pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8; 124 pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */ 125 } 126 127 static void pci_piix_init_ports(PCIIDEState *d) { 128 static const struct { 129 int iobase; 130 int iobase2; 131 int isairq; 132 } port_info[] = { 133 {0x1f0, 0x3f6, 14}, 134 {0x170, 0x376, 15}, 135 }; 136 int i; 137 138 for (i = 0; i < 2; i++) { 139 ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2); 140 ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, 141 port_info[i].iobase2); 142 ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq)); 143 144 bmdma_init(&d->bus[i], &d->bmdma[i], d); 145 d->bmdma[i].bus = &d->bus[i]; 146 ide_register_restart_cb(&d->bus[i]); 147 } 148 } 149 150 static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) 151 { 152 PCIIDEState *d = PCI_IDE(dev); 153 uint8_t *pci_conf = dev->config; 154 155 pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode 156 157 qemu_register_reset(piix3_reset, d); 158 159 bmdma_setup_bar(d); 160 pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar); 161 162 vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d); 163 164 pci_piix_init_ports(d); 165 } 166 167 int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux) 168 { 169 PCIIDEState *pci_ide; 170 DriveInfo *di; 171 int i; 172 IDEDevice *idedev; 173 174 pci_ide = PCI_IDE(dev); 175 176 for (i = aux ? 1 : 0; i < 4; i++) { 177 di = drive_get_by_index(IF_IDE, i); 178 if (di != NULL && !di->media_cd) { 179 BlockBackend *blk = blk_by_legacy_dinfo(di); 180 DeviceState *ds = blk_get_attached_dev(blk); 181 182 blk_drain(blk); 183 blk_flush(blk); 184 185 if (ds) { 186 blk_detach_dev(blk, ds); 187 } 188 pci_ide->bus[di->bus].ifs[di->unit].blk = NULL; 189 if (!(i % 2)) { 190 idedev = pci_ide->bus[di->bus].master; 191 } else { 192 idedev = pci_ide->bus[di->bus].slave; 193 } 194 idedev->conf.blk = NULL; 195 monitor_remove_blk(blk); 196 blk_unref(blk); 197 } 198 } 199 qdev_reset_all(DEVICE(dev)); 200 return 0; 201 } 202 203 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn) 204 { 205 PCIDevice *dev; 206 207 dev = pci_create_simple(bus, devfn, "piix3-ide-xen"); 208 pci_ide_create_devs(dev, hd_table); 209 return dev; 210 } 211 212 static void pci_piix_ide_exitfn(PCIDevice *dev) 213 { 214 PCIIDEState *d = PCI_IDE(dev); 215 unsigned i; 216 217 for (i = 0; i < 2; ++i) { 218 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io); 219 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport); 220 } 221 } 222 223 /* hd_table must contain 4 block drivers */ 224 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */ 225 PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn) 226 { 227 PCIDevice *dev; 228 229 dev = pci_create_simple(bus, devfn, "piix3-ide"); 230 pci_ide_create_devs(dev, hd_table); 231 return dev; 232 } 233 234 /* hd_table must contain 4 block drivers */ 235 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */ 236 PCIDevice *pci_piix4_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn) 237 { 238 PCIDevice *dev; 239 240 dev = pci_create_simple(bus, devfn, "piix4-ide"); 241 pci_ide_create_devs(dev, hd_table); 242 return dev; 243 } 244 245 static void piix3_ide_class_init(ObjectClass *klass, void *data) 246 { 247 DeviceClass *dc = DEVICE_CLASS(klass); 248 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 249 250 k->realize = pci_piix_ide_realize; 251 k->exit = pci_piix_ide_exitfn; 252 k->vendor_id = PCI_VENDOR_ID_INTEL; 253 k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1; 254 k->class_id = PCI_CLASS_STORAGE_IDE; 255 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 256 dc->hotpluggable = false; 257 } 258 259 static const TypeInfo piix3_ide_info = { 260 .name = "piix3-ide", 261 .parent = TYPE_PCI_IDE, 262 .class_init = piix3_ide_class_init, 263 }; 264 265 static const TypeInfo piix3_ide_xen_info = { 266 .name = "piix3-ide-xen", 267 .parent = TYPE_PCI_IDE, 268 .class_init = piix3_ide_class_init, 269 }; 270 271 static void piix4_ide_class_init(ObjectClass *klass, void *data) 272 { 273 DeviceClass *dc = DEVICE_CLASS(klass); 274 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 275 276 k->realize = pci_piix_ide_realize; 277 k->exit = pci_piix_ide_exitfn; 278 k->vendor_id = PCI_VENDOR_ID_INTEL; 279 k->device_id = PCI_DEVICE_ID_INTEL_82371AB; 280 k->class_id = PCI_CLASS_STORAGE_IDE; 281 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 282 dc->hotpluggable = false; 283 } 284 285 static const TypeInfo piix4_ide_info = { 286 .name = "piix4-ide", 287 .parent = TYPE_PCI_IDE, 288 .class_init = piix4_ide_class_init, 289 }; 290 291 static void piix_ide_register_types(void) 292 { 293 type_register_static(&piix3_ide_info); 294 type_register_static(&piix3_ide_xen_info); 295 type_register_static(&piix4_ide_info); 296 } 297 298 type_init(piix_ide_register_types) 299