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 #include <hw/hw.h>
  26 #include <hw/pc.h>
  27 #include <hw/pci.h>
  28 #include <hw/isa.h>
  29 #include "block.h"
  30 #include "sysemu.h"
  31 #include "dma.h"
  32
  33 #include <hw/ide/pci.h>
  34
  35 static uint64_t bmdma_read(void *opaque, target_phys_addr_t addr, unsigned size)
  36 {
  37     BMDMAState *bm = opaque;
  38     uint32_t val;
  39
  40     if (size != 1) {
  41         return ((uint64_t)1 << (size * 8)) - 1;
  42     }
  43
  44     switch(addr & 3) {
  45     case 0:
  46         val = bm->cmd;
  47         break;
  48     case 2:
  49         val = bm->status;
  50         break;
  51     default:
  52         val = 0xff;
  53         break;
  54     }
  55 #ifdef DEBUG_IDE
  56     printf("bmdma: readb 0x%02x : 0x%02x\n", addr, val);
  57 #endif
  58     return val;
  59 }
  60
  61 static void bmdma_write(void *opaque, target_phys_addr_t addr,
  62                         uint64_t val, unsigned size)
  63 {
  64     BMDMAState *bm = opaque;
  65
  66     if (size != 1) {
  67         return;
  68     }
  69
  70 #ifdef DEBUG_IDE
  71     printf("bmdma: writeb 0x%02x : 0x%02x\n", addr, val);
  72 #endif
  73     switch(addr & 3) {
  74     case 0:
  75         return bmdma_cmd_writeb(bm, val);
  76     case 2:
  77         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
  78         break;
  79     }
  80 }
  81
  82 static MemoryRegionOps piix_bmdma_ops = {
  83     .read = bmdma_read,
  84     .write = bmdma_write,
  85 };
  86
  87 static void bmdma_setup_bar(PCIIDEState *d)
  88 {
  89     int i;
  90
  91     memory_region_init(&d->bmdma_bar, "piix-bmdma-container", 16);
  92     for(i = 0;i < 2; i++) {
  93         BMDMAState *bm = &d->bmdma[i];
  94
  95         memory_region_init_io(&bm->extra_io, &piix_bmdma_ops, bm,
  96                               "piix-bmdma", 4);
  97         memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
  98         memory_region_init_io(&bm->addr_ioport, &bmdma_addr_ioport_ops, bm,
  99                               "bmdma", 4);
 100         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 101     }
 102 }
 103
 104 static void piix3_reset(void *opaque)
 105 {
 106     PCIIDEState *d = opaque;
 107     uint8_t *pci_conf = d->dev.config;
 108     int i;
 109
 110     for (i = 0; i < 2; i++) {
 111         ide_bus_reset(&d->bus[i]);
 112     }
 113
 114     /* TODO: this is the default. do not override. */
 115     pci_conf[PCI_COMMAND] = 0x00;
 116     /* TODO: this is the default. do not override. */
 117     pci_conf[PCI_COMMAND + 1] = 0x00;
 118     /* TODO: use pci_set_word */
 119     pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK;
 120     pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
 121     pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
 122 }
 123
 124 static void pci_piix_init_ports(PCIIDEState *d) {
 125     static const struct {
 126         int iobase;
 127         int iobase2;
 128         int isairq;
 129     } port_info[] = {
 130         {0x1f0, 0x3f6, 14},
 131         {0x170, 0x376, 15},
 132     };
 133     int i;
 134
 135     for (i = 0; i < 2; i++) {
 136         ide_bus_new(&d->bus[i], &d->dev.qdev, i);
 137         ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
 138                         port_info[i].iobase2);
 139         ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq));
 140
 141         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 142         d->bmdma[i].bus = &d->bus[i];
 143         qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
 144                                          &d->bmdma[i].dma);
 145     }
 146 }
 147
 148 static int pci_piix_ide_initfn(PCIDevice *dev)
 149 {
 150     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 151     uint8_t *pci_conf = d->dev.config;
 152
 153     pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
 154
 155     qemu_register_reset(piix3_reset, d);
 156
 157     bmdma_setup_bar(d);
 158     pci_register_bar(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 159
 160     vmstate_register(&d->dev.qdev, 0, &vmstate_ide_pci, d);
 161
 162     pci_piix_init_ports(d);
 163
 164     return 0;
 165 }
 166
 167 static int pci_piix3_xen_ide_unplug(DeviceState *dev)
 168 {
 169     PCIDevice *pci_dev;
 170     PCIIDEState *pci_ide;
 171     DriveInfo *di;
 172     int i = 0;
 173
 174     pci_dev = DO_UPCAST(PCIDevice, qdev, dev);
 175     pci_ide = DO_UPCAST(PCIIDEState, dev, pci_dev);
 176
 177     for (; i < 3; i++) {
 178         di = drive_get_by_index(IF_IDE, i);
 179         if (di != NULL && !di->media_cd) {
 180             DeviceState *ds = bdrv_get_attached_dev(di->bdrv);
 181             if (ds) {
 182                 bdrv_detach_dev(di->bdrv, ds);
 183             }
 184             bdrv_close(di->bdrv);
 185             pci_ide->bus[di->bus].ifs[di->unit].bs = NULL;
 186             drive_put_ref(di);
 187         }
 188     }
 189     qdev_reset_all(&(pci_ide->dev.qdev));
 190     return 0;
 191 }
 192
 193 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 194 {
 195     PCIDevice *dev;
 196
 197     dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
 198     pci_ide_create_devs(dev, hd_table);
 199     return dev;
 200 }
 201
 202 static int pci_piix_ide_exitfn(PCIDevice *dev)
 203 {
 204     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 205     unsigned i;
 206
 207     for (i = 0; i < 2; ++i) {
 208         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 209         memory_region_destroy(&d->bmdma[i].extra_io);
 210         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 211         memory_region_destroy(&d->bmdma[i].addr_ioport);
 212     }
 213     memory_region_destroy(&d->bmdma_bar);
 214
 215     return 0;
 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     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 243
 244     k->no_hotplug = 1;
 245     k->init = pci_piix_ide_initfn;
 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 }
 251
 252 static DeviceInfo piix3_ide_info = {
 253     .name = "piix3-ide",
 254     .size = sizeof(PCIIDEState),
 255     .no_user = 1,
 256     .class_init = piix3_ide_class_init,
 257 };
 258
 259 static void piix3_ide_xen_class_init(ObjectClass *klass, void *data)
 260 {
 261     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 262
 263     k->init = pci_piix_ide_initfn;
 264     k->vendor_id = PCI_VENDOR_ID_INTEL;
 265     k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
 266     k->class_id = PCI_CLASS_STORAGE_IDE;
 267 }
 268
 269 static DeviceInfo piix3_ide_xen_info = {
 270     .name = "piix3-ide-xen",
 271     .size = sizeof(PCIIDEState),
 272     .no_user = 1,
 273     .class_init = piix3_ide_xen_class_init,
 274     .unplug = pci_piix3_xen_ide_unplug,
 275 };
 276
 277 static void piix4_ide_class_init(ObjectClass *klass, void *data)
 278 {
 279     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 280
 281     k->no_hotplug = 1;
 282     k->init = pci_piix_ide_initfn;
 283     k->exit = pci_piix_ide_exitfn;
 284     k->vendor_id = PCI_VENDOR_ID_INTEL;
 285     k->device_id = PCI_DEVICE_ID_INTEL_82371AB;
 286     k->class_id = PCI_CLASS_STORAGE_IDE;
 287 }
 288
 289 static DeviceInfo piix4_ide_info = {
 290     .name = "piix4-ide",
 291     .size = sizeof(PCIIDEState),
 292     .no_user = 1,
 293     .class_init = piix4_ide_class_init,
 294 };
 295
 296 static void piix_ide_register(void)
 297 {
 298     pci_qdev_register(&piix3_ide_info);
 299     pci_qdev_register(&piix3_ide_xen_info);
 300     pci_qdev_register(&piix4_ide_info);
 301 }
 302 device_init(piix_ide_register);