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 "qemu/osdep.h"
  27 #include <hw/hw.h>
  28 #include <hw/i386/pc.h>
  29 #include <hw/pci/pci.h>
  30 #include <hw/isa/isa.h>
  31 #include "sysemu/block-backend.h"
  32 #include "sysemu/sysemu.h"
  33 #include "sysemu/dma.h"
  34
  35 #include <hw/ide/pci.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 #ifdef DEBUG_IDE
  58     printf("bmdma: readb 0x%02x : 0x%02x\n", (uint8_t)addr, val);
  59 #endif
  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 #ifdef DEBUG_IDE
  73     printf("bmdma: writeb 0x%02x : 0x%02x\n", (uint8_t)addr, (uint8_t)val);
  74 #endif
  75     switch(addr & 3) {
  76     case 0:
  77         bmdma_cmd_writeb(bm, val);
  78         break;
  79     case 2:
  80         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
  81         break;
  82     }
  83 }
  84
  85 static const MemoryRegionOps piix_bmdma_ops = {
  86     .read = bmdma_read,
  87     .write = bmdma_write,
  88 };
  89
  90 static void bmdma_setup_bar(PCIIDEState *d)
  91 {
  92     int i;
  93
  94     memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16);
  95     for(i = 0;i < 2; i++) {
  96         BMDMAState *bm = &d->bmdma[i];
  97
  98         memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm,
  99                               "piix-bmdma", 4);
 100         memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
 101         memory_region_init_io(&bm->addr_ioport, OBJECT(d),
 102                               &bmdma_addr_ioport_ops, bm, "bmdma", 4);
 103         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 104     }
 105 }
 106
 107 static void piix3_reset(void *opaque)
 108 {
 109     PCIIDEState *d = opaque;
 110     PCIDevice *pd = PCI_DEVICE(d);
 111     uint8_t *pci_conf = pd->config;
 112     int i;
 113
 114     for (i = 0; i < 2; i++) {
 115         ide_bus_reset(&d->bus[i]);
 116     }
 117
 118     /* TODO: this is the default. do not override. */
 119     pci_conf[PCI_COMMAND] = 0x00;
 120     /* TODO: this is the default. do not override. */
 121     pci_conf[PCI_COMMAND + 1] = 0x00;
 122     /* TODO: use pci_set_word */
 123     pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK;
 124     pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
 125     pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
 126 }
 127
 128 static void pci_piix_init_ports(PCIIDEState *d) {
 129     static const struct {
 130         int iobase;
 131         int iobase2;
 132         int isairq;
 133     } port_info[] = {
 134         {0x1f0, 0x3f6, 14},
 135         {0x170, 0x376, 15},
 136     };
 137     int i;
 138
 139     for (i = 0; i < 2; i++) {
 140         ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2);
 141         ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
 142                         port_info[i].iobase2);
 143         ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq));
 144
 145         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 146         d->bmdma[i].bus = &d->bus[i];
 147         ide_register_restart_cb(&d->bus[i]);
 148     }
 149 }
 150
 151 static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
 152 {
 153     PCIIDEState *d = PCI_IDE(dev);
 154     uint8_t *pci_conf = dev->config;
 155
 156     pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
 157
 158     qemu_register_reset(piix3_reset, d);
 159
 160     bmdma_setup_bar(d);
 161     pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 162
 163     vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d);
 164
 165     pci_piix_init_ports(d);
 166 }
 167
 168 int pci_piix3_xen_ide_unplug(DeviceState *dev)
 169 {
 170     PCIIDEState *pci_ide;
 171     DriveInfo *di;
 172     int i;
 173     IDEDevice *idedev;
 174
 175     pci_ide = PCI_IDE(dev);
 176
 177     for (i = 0; i < 4; i++) {
 178         di = drive_get_by_index(IF_IDE, i);
 179         if (di != NULL && !di->media_cd) {
 180             BlockBackend *blk = blk_by_legacy_dinfo(di);
 181             DeviceState *ds = blk_get_attached_dev(blk);
 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             blk_unref(blk);
 193         }
 194     }
 195     qdev_reset_all(DEVICE(dev));
 196     return 0;
 197 }
 198
 199 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 200 {
 201     PCIDevice *dev;
 202
 203     dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
 204     pci_ide_create_devs(dev, hd_table);
 205     return dev;
 206 }
 207
 208 static void pci_piix_ide_exitfn(PCIDevice *dev)
 209 {
 210     PCIIDEState *d = PCI_IDE(dev);
 211     unsigned i;
 212
 213     for (i = 0; i < 2; ++i) {
 214         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 215         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 216     }
 217 }
 218
 219 /* hd_table must contain 4 block drivers */
 220 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
 221 PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 222 {
 223     PCIDevice *dev;
 224
 225     dev = pci_create_simple(bus, devfn, "piix3-ide");
 226     pci_ide_create_devs(dev, hd_table);
 227     return dev;
 228 }
 229
 230 /* hd_table must contain 4 block drivers */
 231 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
 232 PCIDevice *pci_piix4_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 233 {
 234     PCIDevice *dev;
 235
 236     dev = pci_create_simple(bus, devfn, "piix4-ide");
 237     pci_ide_create_devs(dev, hd_table);
 238     return dev;
 239 }
 240
 241 static void piix3_ide_class_init(ObjectClass *klass, void *data)
 242 {
 243     DeviceClass *dc = DEVICE_CLASS(klass);
 244     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 245
 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_82371SB_1;
 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 piix3_ide_info = {
 256     .name          = "piix3-ide",
 257     .parent        = TYPE_PCI_IDE,
 258     .class_init    = piix3_ide_class_init,
 259 };
 260
 261 static void piix3_ide_xen_class_init(ObjectClass *klass, void *data)
 262 {
 263     DeviceClass *dc = DEVICE_CLASS(klass);
 264     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 265
 266     k->realize = pci_piix_ide_realize;
 267     k->vendor_id = PCI_VENDOR_ID_INTEL;
 268     k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
 269     k->class_id = PCI_CLASS_STORAGE_IDE;
 270     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 271 }
 272
 273 static const TypeInfo piix3_ide_xen_info = {
 274     .name          = "piix3-ide-xen",
 275     .parent        = TYPE_PCI_IDE,
 276     .class_init    = piix3_ide_xen_class_init,
 277 };
 278
 279 static void piix4_ide_class_init(ObjectClass *klass, void *data)
 280 {
 281     DeviceClass *dc = DEVICE_CLASS(klass);
 282     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 283
 284     k->realize = pci_piix_ide_realize;
 285     k->exit = pci_piix_ide_exitfn;
 286     k->vendor_id = PCI_VENDOR_ID_INTEL;
 287     k->device_id = PCI_DEVICE_ID_INTEL_82371AB;
 288     k->class_id = PCI_CLASS_STORAGE_IDE;
 289     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 290     dc->hotpluggable = false;
 291 }
 292
 293 static const TypeInfo piix4_ide_info = {
 294     .name          = "piix4-ide",
 295     .parent        = TYPE_PCI_IDE,
 296     .class_init    = piix4_ide_class_init,
 297 };
 298
 299 static void piix_ide_register_types(void)
 300 {
 301     type_register_static(&piix3_ide_info);
 302     type_register_static(&piix3_ide_xen_info);
 303     type_register_static(&piix4_ide_info);
 304 }
 305
 306 type_init(piix_ide_register_types)