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 34 #include "hw/ide/pci.h" 35 #include "trace.h" 36 37 static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size) 38 { 39 BMDMAState *bm = opaque; 40 uint32_t val; 41 42 if (size != 1) { 43 return ((uint64_t)1 << (size * 8)) - 1; 44 } 45 46 switch(addr & 3) { 47 case 0: 48 val = bm->cmd; 49 break; 50 case 2: 51 val = bm->status; 52 break; 53 default: 54 val = 0xff; 55 break; 56 } 57 58 trace_bmdma_read(addr, val); 59 return val; 60 } 61 62 static void bmdma_write(void *opaque, hwaddr addr, 63 uint64_t val, unsigned size) 64 { 65 BMDMAState *bm = opaque; 66 67 if (size != 1) { 68 return; 69 } 70 71 trace_bmdma_write(addr, val); 72 73 switch(addr & 3) { 74 case 0: 75 bmdma_cmd_writeb(bm, val); 76 break; 77 case 2: 78 bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06); 79 break; 80 } 81 } 82 83 static const MemoryRegionOps piix_bmdma_ops = { 84 .read = bmdma_read, 85 .write = bmdma_write, 86 }; 87 88 static void bmdma_setup_bar(PCIIDEState *d) 89 { 90 int i; 91 92 memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16); 93 for(i = 0;i < 2; i++) { 94 BMDMAState *bm = &d->bmdma[i]; 95 96 memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm, 97 "piix-bmdma", 4); 98 memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io); 99 memory_region_init_io(&bm->addr_ioport, OBJECT(d), 100 &bmdma_addr_ioport_ops, bm, "bmdma", 4); 101 memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport); 102 } 103 } 104 105 static void piix_ide_reset(DeviceState *dev) 106 { 107 PCIIDEState *d = PCI_IDE(dev); 108 PCIDevice *pd = PCI_DEVICE(d); 109 uint8_t *pci_conf = pd->config; 110 int i; 111 112 for (i = 0; i < 2; i++) { 113 ide_bus_reset(&d->bus[i]); 114 } 115 116 /* TODO: this is the default. do not override. */ 117 pci_conf[PCI_COMMAND] = 0x00; 118 /* TODO: this is the default. do not override. */ 119 pci_conf[PCI_COMMAND + 1] = 0x00; 120 /* TODO: use pci_set_word */ 121 pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK; 122 pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8; 123 pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */ 124 } 125 126 static void pci_piix_init_ports(PCIIDEState *d) { 127 static const struct { 128 int iobase; 129 int iobase2; 130 int isairq; 131 } port_info[] = { 132 {0x1f0, 0x3f6, 14}, 133 {0x170, 0x376, 15}, 134 }; 135 int i; 136 137 for (i = 0; i < 2; i++) { 138 ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2); 139 ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase, 140 port_info[i].iobase2); 141 ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq)); 142 143 bmdma_init(&d->bus[i], &d->bmdma[i], d); 144 d->bmdma[i].bus = &d->bus[i]; 145 ide_register_restart_cb(&d->bus[i]); 146 } 147 } 148 149 static void pci_piix_ide_realize(PCIDevice *dev, Error **errp) 150 { 151 PCIIDEState *d = PCI_IDE(dev); 152 uint8_t *pci_conf = dev->config; 153 154 pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode 155 156 bmdma_setup_bar(d); 157 pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar); 158 159 vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_pci, d); 160 161 pci_piix_init_ports(d); 162 } 163 164 int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux) 165 { 166 PCIIDEState *pci_ide; 167 DriveInfo *di; 168 int i; 169 IDEDevice *idedev; 170 171 pci_ide = PCI_IDE(dev); 172 173 for (i = aux ? 1 : 0; i < 4; i++) { 174 di = drive_get_by_index(IF_IDE, i); 175 if (di != NULL && !di->media_cd) { 176 BlockBackend *blk = blk_by_legacy_dinfo(di); 177 DeviceState *ds = blk_get_attached_dev(blk); 178 179 blk_drain(blk); 180 blk_flush(blk); 181 182 if (ds) { 183 blk_detach_dev(blk, ds); 184 } 185 pci_ide->bus[di->bus].ifs[di->unit].blk = NULL; 186 if (!(i % 2)) { 187 idedev = pci_ide->bus[di->bus].master; 188 } else { 189 idedev = pci_ide->bus[di->bus].slave; 190 } 191 idedev->conf.blk = NULL; 192 monitor_remove_blk(blk); 193 blk_unref(blk); 194 } 195 } 196 qdev_reset_all(DEVICE(dev)); 197 return 0; 198 } 199 200 static void pci_piix_ide_exitfn(PCIDevice *dev) 201 { 202 PCIIDEState *d = PCI_IDE(dev); 203 unsigned i; 204 205 for (i = 0; i < 2; ++i) { 206 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io); 207 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport); 208 } 209 } 210 211 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */ 212 static void piix3_ide_class_init(ObjectClass *klass, void *data) 213 { 214 DeviceClass *dc = DEVICE_CLASS(klass); 215 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 216 217 dc->reset = piix_ide_reset; 218 k->realize = pci_piix_ide_realize; 219 k->exit = pci_piix_ide_exitfn; 220 k->vendor_id = PCI_VENDOR_ID_INTEL; 221 k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1; 222 k->class_id = PCI_CLASS_STORAGE_IDE; 223 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 224 dc->hotpluggable = false; 225 } 226 227 static const TypeInfo piix3_ide_info = { 228 .name = "piix3-ide", 229 .parent = TYPE_PCI_IDE, 230 .class_init = piix3_ide_class_init, 231 }; 232 233 static const TypeInfo piix3_ide_xen_info = { 234 .name = "piix3-ide-xen", 235 .parent = TYPE_PCI_IDE, 236 .class_init = piix3_ide_class_init, 237 }; 238 239 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */ 240 static void piix4_ide_class_init(ObjectClass *klass, void *data) 241 { 242 DeviceClass *dc = DEVICE_CLASS(klass); 243 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 244 245 dc->reset = piix_ide_reset; 246 k->realize = pci_piix_ide_realize; 247 k->exit = pci_piix_ide_exitfn; 248 k->vendor_id = PCI_VENDOR_ID_INTEL; 249 k->device_id = PCI_DEVICE_ID_INTEL_82371AB; 250 k->class_id = PCI_CLASS_STORAGE_IDE; 251 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 252 dc->hotpluggable = false; 253 } 254 255 static const TypeInfo piix4_ide_info = { 256 .name = "piix4-ide", 257 .parent = TYPE_PCI_IDE, 258 .class_init = piix4_ide_class_init, 259 }; 260 261 static void piix_ide_register_types(void) 262 { 263 type_register_static(&piix3_ide_info); 264 type_register_static(&piix3_ide_xen_info); 265 type_register_static(&piix4_ide_info); 266 } 267 268 type_init(piix_ide_register_types) 269