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 "block_int.h"
  31 #include "sysemu.h"
  32 #include "dma.h"
  33
  34 #include <hw/ide/pci.h>
  35
  36 static uint64_t bmdma_read(void *opaque, target_phys_addr_t 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", addr, val);
  58 #endif
  59     return val;
  60 }
  61
  62 static void bmdma_write(void *opaque, target_phys_addr_t 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", addr, val);
  73 #endif
  74     switch(addr & 3) {
  75     case 0:
  76         return bmdma_cmd_writeb(bm, val);
  77     case 2:
  78         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
  79         break;
  80     }
  81 }
  82
  83 static 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, "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, &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, &bmdma_addr_ioport_ops, bm,
 100                               "bmdma", 4);
 101         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 102     }
 103 }
 104
 105 static void piix3_reset(void *opaque)
 106 {
 107     PCIIDEState *d = opaque;
 108     uint8_t *pci_conf = d->dev.config;
 109     int i;
 110
 111     for (i = 0; i < 2; i++) {
 112         ide_bus_reset(&d->bus[i]);
 113     }
 114
 115     /* TODO: this is the default. do not override. */
 116     pci_conf[PCI_COMMAND] = 0x00;
 117     /* TODO: this is the default. do not override. */
 118     pci_conf[PCI_COMMAND + 1] = 0x00;
 119     /* TODO: use pci_set_word */
 120     pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK;
 121     pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
 122     pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
 123 }
 124
 125 static void pci_piix_init_ports(PCIIDEState *d) {
 126     int i;
 127     struct {
 128         int iobase;
 129         int iobase2;
 130         int isairq;
 131     } port_info[] = {
 132         {0x1f0, 0x3f6, 14},
 133         {0x170, 0x376, 15},
 134     };
 135
 136     for (i = 0; i < 2; i++) {
 137         ide_bus_new(&d->bus[i], &d->dev.qdev, i);
 138         ide_init_ioport(&d->bus[i], port_info[i].iobase, port_info[i].iobase2);
 139         ide_init2(&d->bus[i], isa_get_irq(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_region(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO,
 159                             &d->bmdma_bar);
 160
 161     vmstate_register(&d->dev.qdev, 0, &vmstate_ide_pci, d);
 162
 163     pci_piix_init_ports(d);
 164
 165     return 0;
 166 }
 167
 168 static int pci_piix3_xen_ide_unplug(DeviceState *dev)
 169 {
 170     PCIDevice *pci_dev;
 171     PCIIDEState *pci_ide;
 172     DriveInfo *di;
 173     int i = 0;
 174
 175     pci_dev = DO_UPCAST(PCIDevice, qdev, dev);
 176     pci_ide = DO_UPCAST(PCIIDEState, dev, pci_dev);
 177
 178     for (; i < 3; i++) {
 179         di = drive_get_by_index(IF_IDE, i);
 180         if (di != NULL && di->bdrv != NULL && !di->bdrv->removable) {
 181             DeviceState *ds = bdrv_get_attached(di->bdrv);
 182             if (ds) {
 183                 bdrv_detach(di->bdrv, ds);
 184             }
 185             bdrv_close(di->bdrv);
 186             pci_ide->bus[di->bus].ifs[di->unit].bs = NULL;
 187             drive_put_ref(di);
 188         }
 189     }
 190     qdev_reset_all(&(pci_ide->dev.qdev));
 191     return 0;
 192 }
 193
 194 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 195 {
 196     PCIDevice *dev;
 197
 198     dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
 199     dev->qdev.info->unplug = pci_piix3_xen_ide_unplug;
 200     pci_ide_create_devs(dev, hd_table);
 201     return dev;
 202 }
 203
 204 static int pci_piix_ide_exitfn(PCIDevice *dev)
 205 {
 206     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 207     unsigned i;
 208
 209     for (i = 0; i < 2; ++i) {
 210         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 211         memory_region_destroy(&d->bmdma[i].extra_io);
 212         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 213         memory_region_destroy(&d->bmdma[i].addr_ioport);
 214     }
 215     memory_region_destroy(&d->bmdma_bar);
 216
 217     return 0;
 218 }
 219
 220 /* hd_table must contain 4 block drivers */
 221 /* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
 222 PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 223 {
 224     PCIDevice *dev;
 225
 226     dev = pci_create_simple(bus, devfn, "piix3-ide");
 227     pci_ide_create_devs(dev, hd_table);
 228     return dev;
 229 }
 230
 231 /* hd_table must contain 4 block drivers */
 232 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
 233 PCIDevice *pci_piix4_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 234 {
 235     PCIDevice *dev;
 236
 237     dev = pci_create_simple(bus, devfn, "piix4-ide");
 238     pci_ide_create_devs(dev, hd_table);
 239     return dev;
 240 }
 241
 242 static PCIDeviceInfo piix_ide_info[] = {
 243     {
 244         .qdev.name    = "piix3-ide",
 245         .qdev.size    = sizeof(PCIIDEState),
 246         .qdev.no_user = 1,
 247         .no_hotplug   = 1,
 248         .init         = pci_piix_ide_initfn,
 249         .exit         = pci_piix_ide_exitfn,
 250         .vendor_id    = PCI_VENDOR_ID_INTEL,
 251         .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
 252         .class_id     = PCI_CLASS_STORAGE_IDE,
 253     },{
 254         .qdev.name    = "piix3-ide-xen",
 255         .qdev.size    = sizeof(PCIIDEState),
 256         .qdev.no_user = 1,
 257         .init         = pci_piix_ide_initfn,
 258         .vendor_id    = PCI_VENDOR_ID_INTEL,
 259         .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
 260         .class_id     = PCI_CLASS_STORAGE_IDE,
 261     },{
 262         .qdev.name    = "piix4-ide",
 263         .qdev.size    = sizeof(PCIIDEState),
 264         .qdev.no_user = 1,
 265         .no_hotplug   = 1,
 266         .init         = pci_piix_ide_initfn,
 267         .exit         = pci_piix_ide_exitfn,
 268         .vendor_id    = PCI_VENDOR_ID_INTEL,
 269         .device_id    = PCI_DEVICE_ID_INTEL_82371AB,
 270         .class_id     = PCI_CLASS_STORAGE_IDE,
 271     },{
 272         /* end of list */
 273     }
 274 };
 275
 276 static void piix_ide_register(void)
 277 {
 278     pci_qdev_register_many(piix_ide_info);
 279 }
 280 device_init(piix_ide_register);