hw/ide/piix.c

   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 <hw/hw.h>
  27 #include <hw/i386/pc.h>
  28 #include <hw/pci/pci.h>
  29 #include <hw/isa/isa.h>
  30 #include "sysemu/block-backend.h"
  31 #include "sysemu/sysemu.h"
  32 #include "sysemu/dma.h"
  33
  34 #include <hw/ide/pci.h>
  35
  36 static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size)
  37 {
  38     BMDMAState *bm = opaque;
  39     uint32_t val;
  40
  41     if (size != 1) {
  42         return ((uint64_t)1 << (size * 8)) - 1;
  43     }
  44
  45     switch(addr & 3) {
  46     case 0:
  47         val = bm->cmd;
  48         break;
  49     case 2:
  50         val = bm->status;
  51         break;
  52     default:
  53         val = 0xff;
  54         break;
  55     }
  56 #ifdef DEBUG_IDE
  57     printf("bmdma: readb 0x%02x : 0x%02x\n", (uint8_t)addr, val);
  58 #endif
  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 #ifdef DEBUG_IDE
  72     printf("bmdma: writeb 0x%02x : 0x%02x\n", (uint8_t)addr, (uint8_t)val);
  73 #endif
  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)
 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 = 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             if (ds) {
 182                 blk_detach_dev(blk, ds);
 183             }
 184             pci_ide->bus[di->bus].ifs[di->unit].blk = NULL;
 185             if (!(i % 2)) {
 186                 idedev = pci_ide->bus[di->bus].master;
 187             } else {
 188                 idedev = pci_ide->bus[di->bus].slave;
 189             }
 190             idedev->conf.blk = NULL;
 191             blk_unref(blk);
 192         }
 193     }
 194     qdev_reset_all(DEVICE(dev));
 195     return 0;
 196 }
 197
 198 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 199 {
 200     PCIDevice *dev;
 201
 202     dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
 203     pci_ide_create_devs(dev, hd_table);
 204     return dev;
 205 }
 206
 207 static void pci_piix_ide_exitfn(PCIDevice *dev)
 208 {
 209     PCIIDEState *d = PCI_IDE(dev);
 210     unsigned i;
 211
 212     for (i = 0; i < 2; ++i) {
 213         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 214         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 215     }
 216 }
 217
 218 /* hd_table must contain 4 block drivers */
 219 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
 220 PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 221 {
 222     PCIDevice *dev;
 223
 224     dev = pci_create_simple(bus, devfn, "piix3-ide");
 225     pci_ide_create_devs(dev, hd_table);
 226     return dev;
 227 }
 228
 229 /* hd_table must contain 4 block drivers */
 230 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
 231 PCIDevice *pci_piix4_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 232 {
 233     PCIDevice *dev;
 234
 235     dev = pci_create_simple(bus, devfn, "piix4-ide");
 236     pci_ide_create_devs(dev, hd_table);
 237     return dev;
 238 }
 239
 240 static void piix3_ide_class_init(ObjectClass *klass, void *data)
 241 {
 242     DeviceClass *dc = DEVICE_CLASS(klass);
 243     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 244
 245     k->realize = pci_piix_ide_realize;
 246     k->exit = pci_piix_ide_exitfn;
 247     k->vendor_id = PCI_VENDOR_ID_INTEL;
 248     k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
 249     k->class_id = PCI_CLASS_STORAGE_IDE;
 250     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 251     dc->hotpluggable = false;
 252 }
 253
 254 static const TypeInfo piix3_ide_info = {
 255     .name          = "piix3-ide",
 256     .parent        = TYPE_PCI_IDE,
 257     .class_init    = piix3_ide_class_init,
 258 };
 259
 260 static void piix3_ide_xen_class_init(ObjectClass *klass, void *data)
 261 {
 262     DeviceClass *dc = DEVICE_CLASS(klass);
 263     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 264
 265     k->realize = pci_piix_ide_realize;
 266     k->vendor_id = PCI_VENDOR_ID_INTEL;
 267     k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
 268     k->class_id = PCI_CLASS_STORAGE_IDE;
 269     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 270 }
 271
 272 static const TypeInfo piix3_ide_xen_info = {
 273     .name          = "piix3-ide-xen",
 274     .parent        = TYPE_PCI_IDE,
 275     .class_init    = piix3_ide_xen_class_init,
 276 };
 277
 278 static void piix4_ide_class_init(ObjectClass *klass, void *data)
 279 {
 280     DeviceClass *dc = DEVICE_CLASS(klass);
 281     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 282
 283     k->realize = pci_piix_ide_realize;
 284     k->exit = pci_piix_ide_exitfn;
 285     k->vendor_id = PCI_VENDOR_ID_INTEL;
 286     k->device_id = PCI_DEVICE_ID_INTEL_82371AB;
 287     k->class_id = PCI_CLASS_STORAGE_IDE;
 288     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 289     dc->hotpluggable = false;
 290 }
 291
 292 static const TypeInfo piix4_ide_info = {
 293     .name          = "piix4-ide",
 294     .parent        = TYPE_PCI_IDE,
 295     .class_init    = piix4_ide_class_init,
 296 };
 297
 298 static void piix_ide_register_types(void)
 299 {
 300     type_register_static(&piix3_ide_info);
 301     type_register_static(&piix3_ide_xen_info);
 302     type_register_static(&piix4_ide_info);
 303 }
 304
 305 type_init(piix_ide_register_types)