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     int i;
 126     struct {
 127         int iobase;
 128         int iobase2;
 129         int isairq;
 130     } port_info[] = {
 131         {0x1f0, 0x3f6, 14},
 132         {0x170, 0x376, 15},
 133     };
 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], port_info[i].iobase, port_info[i].iobase2);
 138         ide_init2(&d->bus[i], isa_get_irq(port_info[i].isairq));
 139
 140         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 141         d->bmdma[i].bus = &d->bus[i];
 142         qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
 143                                          &d->bmdma[i].dma);
 144     }
 145 }
 146
 147 static int pci_piix_ide_initfn(PCIDevice *dev)
 148 {
 149     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 150     uint8_t *pci_conf = d->dev.config;
 151
 152     pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
 153
 154     qemu_register_reset(piix3_reset, d);
 155
 156     bmdma_setup_bar(d);
 157     pci_register_bar(&d->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 158
 159     vmstate_register(&d->dev.qdev, 0, &vmstate_ide_pci, d);
 160
 161     pci_piix_init_ports(d);
 162
 163     return 0;
 164 }
 165
 166 static int pci_piix3_xen_ide_unplug(DeviceState *dev)
 167 {
 168     PCIDevice *pci_dev;
 169     PCIIDEState *pci_ide;
 170     DriveInfo *di;
 171     int i = 0;
 172
 173     pci_dev = DO_UPCAST(PCIDevice, qdev, dev);
 174     pci_ide = DO_UPCAST(PCIIDEState, dev, pci_dev);
 175
 176     for (; i < 3; i++) {
 177         di = drive_get_by_index(IF_IDE, i);
 178         if (di != NULL && !di->media_cd) {
 179             DeviceState *ds = bdrv_get_attached_dev(di->bdrv);
 180             if (ds) {
 181                 bdrv_detach_dev(di->bdrv, ds);
 182             }
 183             bdrv_close(di->bdrv);
 184             pci_ide->bus[di->bus].ifs[di->unit].bs = NULL;
 185             drive_put_ref(di);
 186         }
 187     }
 188     qdev_reset_all(&(pci_ide->dev.qdev));
 189     return 0;
 190 }
 191
 192 PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
 193 {
 194     PCIDevice *dev;
 195
 196     dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
 197     dev->qdev.info->unplug = pci_piix3_xen_ide_unplug;
 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 PCIDeviceInfo piix_ide_info[] = {
 241     {
 242         .qdev.name    = "piix3-ide",
 243         .qdev.size    = sizeof(PCIIDEState),
 244         .qdev.no_user = 1,
 245         .no_hotplug   = 1,
 246         .init         = pci_piix_ide_initfn,
 247         .exit         = pci_piix_ide_exitfn,
 248         .vendor_id    = PCI_VENDOR_ID_INTEL,
 249         .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
 250         .class_id     = PCI_CLASS_STORAGE_IDE,
 251     },{
 252         .qdev.name    = "piix3-ide-xen",
 253         .qdev.size    = sizeof(PCIIDEState),
 254         .qdev.no_user = 1,
 255         .init         = pci_piix_ide_initfn,
 256         .vendor_id    = PCI_VENDOR_ID_INTEL,
 257         .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
 258         .class_id     = PCI_CLASS_STORAGE_IDE,
 259     },{
 260         .qdev.name    = "piix4-ide",
 261         .qdev.size    = sizeof(PCIIDEState),
 262         .qdev.no_user = 1,
 263         .no_hotplug   = 1,
 264         .init         = pci_piix_ide_initfn,
 265         .exit         = pci_piix_ide_exitfn,
 266         .vendor_id    = PCI_VENDOR_ID_INTEL,
 267         .device_id    = PCI_DEVICE_ID_INTEL_82371AB,
 268         .class_id     = PCI_CLASS_STORAGE_IDE,
 269     },{
 270         /* end of list */
 271     }
 272 };
 273
 274 static void piix_ide_register(void)
 275 {
 276     pci_qdev_register_many(piix_ide_info);
 277 }
 278 device_init(piix_ide_register);