hw/ide/macio.c

   1 /*
   2  * QEMU IDE Emulation: MacIO 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/ppc_mac.h>
  27 #include <hw/mac_dbdma.h>
  28 #include "block.h"
  29 #include "block_int.h"
  30 #include "sysemu.h"
  31 #include "dma.h"
  32
  33 #include <hw/ide/internal.h>
  34
  35 /***********************************************************/
  36 /* MacIO based PowerPC IDE */
  37
  38 typedef struct MACIOIDEState {
  39     IDEBus bus;
  40     BlockDriverAIOCB *aiocb;
  41 } MACIOIDEState;
  42
  43 #define MACIO_PAGE_SIZE 4096
  44
  45 static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
  46 {
  47     DBDMA_io *io = opaque;
  48     MACIOIDEState *m = io->opaque;
  49     IDEState *s = idebus_active_if(&m->bus);
  50
  51     if (ret < 0) {
  52         m->aiocb = NULL;
  53         qemu_sglist_destroy(&s->sg);
  54         ide_atapi_io_error(s, ret);
  55         io->dma_end(opaque);
  56         return;
  57     }
  58
  59     if (s->io_buffer_size > 0) {
  60         m->aiocb = NULL;
  61         qemu_sglist_destroy(&s->sg);
  62
  63         s->packet_transfer_size -= s->io_buffer_size;
  64
  65         s->io_buffer_index += s->io_buffer_size;
  66         s->lba += s->io_buffer_index >> 11;
  67         s->io_buffer_index &= 0x7ff;
  68     }
  69
  70     if (s->packet_transfer_size <= 0)
  71         ide_atapi_cmd_ok(s);
  72
  73     if (io->len == 0) {
  74         io->dma_end(opaque);
  75         return;
  76     }
  77
  78     /* launch next transfer */
  79
  80     s->io_buffer_size = io->len;
  81
  82     qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1);
  83     qemu_sglist_add(&s->sg, io->addr, io->len);
  84     io->addr += io->len;
  85     io->len = 0;
  86
  87     m->aiocb = dma_bdrv_read(s->bs, &s->sg,
  88                              (int64_t)(s->lba << 2) + (s->io_buffer_index >> 9),
  89                              pmac_ide_atapi_transfer_cb, io);
  90     if (!m->aiocb) {
  91         qemu_sglist_destroy(&s->sg);
  92         /* Note: media not present is the most likely case */
  93         ide_atapi_cmd_error(s, SENSE_NOT_READY,
  94                             ASC_MEDIUM_NOT_PRESENT);
  95         io->dma_end(opaque);
  96         return;
  97     }
  98 }
  99
 100 static void pmac_ide_transfer_cb(void *opaque, int ret)
 101 {
 102     DBDMA_io *io = opaque;
 103     MACIOIDEState *m = io->opaque;
 104     IDEState *s = idebus_active_if(&m->bus);
 105     int n;
 106     int64_t sector_num;
 107
 108     if (ret < 0) {
 109         m->aiocb = NULL;
 110         qemu_sglist_destroy(&s->sg);
 111         ide_dma_error(s);
 112         io->dma_end(io);
 113         return;
 114     }
 115
 116     sector_num = ide_get_sector(s);
 117     if (s->io_buffer_size > 0) {
 118         m->aiocb = NULL;
 119         qemu_sglist_destroy(&s->sg);
 120         n = (s->io_buffer_size + 0x1ff) >> 9;
 121         sector_num += n;
 122         ide_set_sector(s, sector_num);
 123         s->nsector -= n;
 124     }
 125
 126     /* end of transfer ? */
 127     if (s->nsector == 0) {
 128         s->status = READY_STAT | SEEK_STAT;
 129         ide_set_irq(s->bus);
 130     }
 131
 132     /* end of DMA ? */
 133
 134     if (io->len == 0) {
 135         io->dma_end(io);
 136         return;
 137     }
 138
 139     /* launch next transfer */
 140
 141     s->io_buffer_index = 0;
 142     s->io_buffer_size = io->len;
 143
 144     qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1);
 145     qemu_sglist_add(&s->sg, io->addr, io->len);
 146     io->addr += io->len;
 147     io->len = 0;
 148
 149     if (s->is_read)
 150         m->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num,
 151                                  pmac_ide_transfer_cb, io);
 152     else
 153         m->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num,
 154                                   pmac_ide_transfer_cb, io);
 155     if (!m->aiocb)
 156         pmac_ide_transfer_cb(io, -1);
 157 }
 158
 159 static void pmac_ide_transfer(DBDMA_io *io)
 160 {
 161     MACIOIDEState *m = io->opaque;
 162     IDEState *s = idebus_active_if(&m->bus);
 163
 164     s->io_buffer_size = 0;
 165     if (s->drive_kind == IDE_CD) {
 166         pmac_ide_atapi_transfer_cb(io, 0);
 167         return;
 168     }
 169
 170     pmac_ide_transfer_cb(io, 0);
 171 }
 172
 173 static void pmac_ide_flush(DBDMA_io *io)
 174 {
 175     MACIOIDEState *m = io->opaque;
 176
 177     if (m->aiocb)
 178         qemu_aio_flush();
 179 }
 180
 181 /* PowerMac IDE memory IO */
 182 static void pmac_ide_writeb (void *opaque,
 183                              target_phys_addr_t addr, uint32_t val)
 184 {
 185     MACIOIDEState *d = opaque;
 186
 187     addr = (addr & 0xFFF) >> 4;
 188     switch (addr) {
 189     case 1 ... 7:
 190         ide_ioport_write(&d->bus, addr, val);
 191         break;
 192     case 8:
 193     case 22:
 194         ide_cmd_write(&d->bus, 0, val);
 195         break;
 196     default:
 197         break;
 198     }
 199 }
 200
 201 static uint32_t pmac_ide_readb (void *opaque,target_phys_addr_t addr)
 202 {
 203     uint8_t retval;
 204     MACIOIDEState *d = opaque;
 205
 206     addr = (addr & 0xFFF) >> 4;
 207     switch (addr) {
 208     case 1 ... 7:
 209         retval = ide_ioport_read(&d->bus, addr);
 210         break;
 211     case 8:
 212     case 22:
 213         retval = ide_status_read(&d->bus, 0);
 214         break;
 215     default:
 216         retval = 0xFF;
 217         break;
 218     }
 219     return retval;
 220 }
 221
 222 static void pmac_ide_writew (void *opaque,
 223                              target_phys_addr_t addr, uint32_t val)
 224 {
 225     MACIOIDEState *d = opaque;
 226
 227     addr = (addr & 0xFFF) >> 4;
 228     val = bswap16(val);
 229     if (addr == 0) {
 230         ide_data_writew(&d->bus, 0, val);
 231     }
 232 }
 233
 234 static uint32_t pmac_ide_readw (void *opaque,target_phys_addr_t addr)
 235 {
 236     uint16_t retval;
 237     MACIOIDEState *d = opaque;
 238
 239     addr = (addr & 0xFFF) >> 4;
 240     if (addr == 0) {
 241         retval = ide_data_readw(&d->bus, 0);
 242     } else {
 243         retval = 0xFFFF;
 244     }
 245     retval = bswap16(retval);
 246     return retval;
 247 }
 248
 249 static void pmac_ide_writel (void *opaque,
 250                              target_phys_addr_t addr, uint32_t val)
 251 {
 252     MACIOIDEState *d = opaque;
 253
 254     addr = (addr & 0xFFF) >> 4;
 255     val = bswap32(val);
 256     if (addr == 0) {
 257         ide_data_writel(&d->bus, 0, val);
 258     }
 259 }
 260
 261 static uint32_t pmac_ide_readl (void *opaque,target_phys_addr_t addr)
 262 {
 263     uint32_t retval;
 264     MACIOIDEState *d = opaque;
 265
 266     addr = (addr & 0xFFF) >> 4;
 267     if (addr == 0) {
 268         retval = ide_data_readl(&d->bus, 0);
 269     } else {
 270         retval = 0xFFFFFFFF;
 271     }
 272     retval = bswap32(retval);
 273     return retval;
 274 }
 275
 276 static CPUWriteMemoryFunc * const pmac_ide_write[] = {
 277     pmac_ide_writeb,
 278     pmac_ide_writew,
 279     pmac_ide_writel,
 280 };
 281
 282 static CPUReadMemoryFunc * const pmac_ide_read[] = {
 283     pmac_ide_readb,
 284     pmac_ide_readw,
 285     pmac_ide_readl,
 286 };
 287
 288 static const VMStateDescription vmstate_pmac = {
 289     .name = "ide",
 290     .version_id = 3,
 291     .minimum_version_id = 0,
 292     .minimum_version_id_old = 0,
 293     .fields      = (VMStateField []) {
 294         VMSTATE_IDE_BUS(bus, MACIOIDEState),
 295         VMSTATE_IDE_DRIVES(bus.ifs, MACIOIDEState),
 296         VMSTATE_END_OF_LIST()
 297     }
 298 };
 299
 300 static void pmac_ide_reset(void *opaque)
 301 {
 302     MACIOIDEState *d = opaque;
 303
 304     ide_bus_reset(&d->bus);
 305 }
 306
 307 /* hd_table must contain 4 block drivers */
 308 /* PowerMac uses memory mapped registers, not I/O. Return the memory
 309    I/O index to access the ide. */
 310 int pmac_ide_init (DriveInfo **hd_table, qemu_irq irq,
 311                    void *dbdma, int channel, qemu_irq dma_irq)
 312 {
 313     MACIOIDEState *d;
 314     int pmac_ide_memory;
 315
 316     d = qemu_mallocz(sizeof(MACIOIDEState));
 317     ide_init2_with_non_qdev_drives(&d->bus, hd_table[0], hd_table[1], irq);
 318
 319     if (dbdma)
 320         DBDMA_register_channel(dbdma, channel, dma_irq, pmac_ide_transfer, pmac_ide_flush, d);
 321
 322     pmac_ide_memory = cpu_register_io_memory(pmac_ide_read,
 323                                              pmac_ide_write, d);
 324     vmstate_register(0, &vmstate_pmac, d);
 325     qemu_register_reset(pmac_ide_reset, d);
 326
 327     return pmac_ide_memory;
 328 }