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/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     int i;
 168     IDEDevice *idedev;
 169     IDEBus *idebus;
 170     BlockBackend *blk;
 171
 172     pci_ide = PCI_IDE(dev);
 173
 174     for (i = aux ? 1 : 0; i < 4; i++) {
 175         idebus = &pci_ide->bus[i / 2];
 176         blk = idebus->ifs[i % 2].blk;
 177
 178         if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) {
 179             if (!(i % 2)) {
 180                 idedev = idebus->master;
 181             } else {
 182                 idedev = idebus->slave;
 183             }
 184
 185             blk_drain(blk);
 186             blk_flush(blk);
 187
 188             blk_detach_dev(blk, DEVICE(idedev));
 189             idebus->ifs[i % 2].blk = NULL;
 190             idedev->conf.blk = NULL;
 191             monitor_remove_blk(blk);
 192             blk_unref(blk);
 193         }
 194     }
 195     qdev_reset_all(dev);
 196     return 0;
 197 }
 198
 199 static void pci_piix_ide_exitfn(PCIDevice *dev)
 200 {
 201     PCIIDEState *d = PCI_IDE(dev);
 202     unsigned i;
 203
 204     for (i = 0; i < 2; ++i) {
 205         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 206         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 207     }
 208 }
 209
 210 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
 211 static void piix3_ide_class_init(ObjectClass *klass, void *data)
 212 {
 213     DeviceClass *dc = DEVICE_CLASS(klass);
 214     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 215
 216     dc->reset = piix_ide_reset;
 217     k->realize = pci_piix_ide_realize;
 218     k->exit = pci_piix_ide_exitfn;
 219     k->vendor_id = PCI_VENDOR_ID_INTEL;
 220     k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
 221     k->class_id = PCI_CLASS_STORAGE_IDE;
 222     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 223     dc->hotpluggable = false;
 224 }
 225
 226 static const TypeInfo piix3_ide_info = {
 227     .name          = "piix3-ide",
 228     .parent        = TYPE_PCI_IDE,
 229     .class_init    = piix3_ide_class_init,
 230 };
 231
 232 static const TypeInfo piix3_ide_xen_info = {
 233     .name          = "piix3-ide-xen",
 234     .parent        = TYPE_PCI_IDE,
 235     .class_init    = piix3_ide_class_init,
 236 };
 237
 238 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
 239 static void piix4_ide_class_init(ObjectClass *klass, void *data)
 240 {
 241     DeviceClass *dc = DEVICE_CLASS(klass);
 242     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 243
 244     dc->reset = piix_ide_reset;
 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_82371AB;
 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 piix4_ide_info = {
 255     .name          = "piix4-ide",
 256     .parent        = TYPE_PCI_IDE,
 257     .class_init    = piix4_ide_class_init,
 258 };
 259
 260 static void piix_ide_register_types(void)
 261 {
 262     type_register_static(&piix3_ide_info);
 263     type_register_static(&piix3_ide_xen_info);
 264     type_register_static(&piix4_ide_info);
 265 }
 266
 267 type_init(piix_ide_register_types)