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ae4d2eb273
The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to request unplug of 'aux' disks (which is stated to mean all IDE disks, except the primary master). This patch adds support for that unplug request. NOTE: The semantics of what happens if unplug of all disks and 'aux' disks is simultaneously requests is not clear. The patch makes that assumption that an 'all' request overrides an 'aux' request. [1] http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.markdown Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> ---- Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Anthony Perard <anthony.perard@citrix.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: John Snow <jsnow@redhat.com>
300 lines
8.3 KiB
C
300 lines
8.3 KiB
C
/*
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* QEMU IDE Emulation: PCI PIIX3/4 support.
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*
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2006 Openedhand Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/i386/pc.h"
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#include "hw/pci/pci.h"
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#include "hw/isa/isa.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/dma.h"
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#include "hw/ide/pci.h"
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static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size)
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{
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BMDMAState *bm = opaque;
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uint32_t val;
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if (size != 1) {
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return ((uint64_t)1 << (size * 8)) - 1;
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}
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switch(addr & 3) {
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case 0:
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val = bm->cmd;
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break;
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case 2:
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val = bm->status;
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break;
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default:
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val = 0xff;
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break;
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}
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#ifdef DEBUG_IDE
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printf("bmdma: readb 0x%02x : 0x%02x\n", (uint8_t)addr, val);
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#endif
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return val;
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}
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static void bmdma_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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BMDMAState *bm = opaque;
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if (size != 1) {
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return;
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}
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#ifdef DEBUG_IDE
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printf("bmdma: writeb 0x%02x : 0x%02x\n", (uint8_t)addr, (uint8_t)val);
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#endif
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switch(addr & 3) {
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case 0:
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bmdma_cmd_writeb(bm, val);
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break;
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case 2:
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bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
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break;
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}
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}
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static const MemoryRegionOps piix_bmdma_ops = {
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.read = bmdma_read,
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.write = bmdma_write,
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};
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static void bmdma_setup_bar(PCIIDEState *d)
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{
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int i;
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memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16);
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for(i = 0;i < 2; i++) {
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BMDMAState *bm = &d->bmdma[i];
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memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm,
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"piix-bmdma", 4);
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memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
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memory_region_init_io(&bm->addr_ioport, OBJECT(d),
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&bmdma_addr_ioport_ops, bm, "bmdma", 4);
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memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
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}
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}
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static void piix3_reset(void *opaque)
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{
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PCIIDEState *d = opaque;
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PCIDevice *pd = PCI_DEVICE(d);
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uint8_t *pci_conf = pd->config;
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int i;
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for (i = 0; i < 2; i++) {
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ide_bus_reset(&d->bus[i]);
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}
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/* TODO: this is the default. do not override. */
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pci_conf[PCI_COMMAND] = 0x00;
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/* TODO: this is the default. do not override. */
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pci_conf[PCI_COMMAND + 1] = 0x00;
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/* TODO: use pci_set_word */
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pci_conf[PCI_STATUS] = PCI_STATUS_FAST_BACK;
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pci_conf[PCI_STATUS + 1] = PCI_STATUS_DEVSEL_MEDIUM >> 8;
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pci_conf[0x20] = 0x01; /* BMIBA: 20-23h */
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}
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static void pci_piix_init_ports(PCIIDEState *d) {
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static const struct {
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int iobase;
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int iobase2;
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int isairq;
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} port_info[] = {
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{0x1f0, 0x3f6, 14},
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{0x170, 0x376, 15},
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};
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int i;
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for (i = 0; i < 2; i++) {
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ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2);
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ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
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port_info[i].iobase2);
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ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq));
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bmdma_init(&d->bus[i], &d->bmdma[i], d);
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d->bmdma[i].bus = &d->bus[i];
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ide_register_restart_cb(&d->bus[i]);
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}
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}
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static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
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{
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PCIIDEState *d = PCI_IDE(dev);
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uint8_t *pci_conf = dev->config;
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pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
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qemu_register_reset(piix3_reset, d);
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bmdma_setup_bar(d);
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pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
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vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d);
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pci_piix_init_ports(d);
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}
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int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux)
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{
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PCIIDEState *pci_ide;
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DriveInfo *di;
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int i;
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IDEDevice *idedev;
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pci_ide = PCI_IDE(dev);
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for (i = aux ? 1 : 0; i < 4; i++) {
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di = drive_get_by_index(IF_IDE, i);
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if (di != NULL && !di->media_cd) {
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BlockBackend *blk = blk_by_legacy_dinfo(di);
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DeviceState *ds = blk_get_attached_dev(blk);
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blk_drain(blk);
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blk_flush(blk);
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if (ds) {
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blk_detach_dev(blk, ds);
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}
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pci_ide->bus[di->bus].ifs[di->unit].blk = NULL;
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if (!(i % 2)) {
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idedev = pci_ide->bus[di->bus].master;
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} else {
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idedev = pci_ide->bus[di->bus].slave;
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}
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idedev->conf.blk = NULL;
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monitor_remove_blk(blk);
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blk_unref(blk);
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}
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}
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qdev_reset_all(DEVICE(dev));
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return 0;
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}
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PCIDevice *pci_piix3_xen_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
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{
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PCIDevice *dev;
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dev = pci_create_simple(bus, devfn, "piix3-ide-xen");
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pci_ide_create_devs(dev, hd_table);
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return dev;
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}
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static void pci_piix_ide_exitfn(PCIDevice *dev)
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{
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PCIIDEState *d = PCI_IDE(dev);
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unsigned i;
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for (i = 0; i < 2; ++i) {
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memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
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memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
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}
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}
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/* hd_table must contain 4 block drivers */
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/* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
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PCIDevice *pci_piix3_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
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{
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PCIDevice *dev;
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dev = pci_create_simple(bus, devfn, "piix3-ide");
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pci_ide_create_devs(dev, hd_table);
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return dev;
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}
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/* hd_table must contain 4 block drivers */
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/* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
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PCIDevice *pci_piix4_ide_init(PCIBus *bus, DriveInfo **hd_table, int devfn)
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{
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PCIDevice *dev;
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dev = pci_create_simple(bus, devfn, "piix4-ide");
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pci_ide_create_devs(dev, hd_table);
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return dev;
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}
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static void piix3_ide_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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k->realize = pci_piix_ide_realize;
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k->exit = pci_piix_ide_exitfn;
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k->vendor_id = PCI_VENDOR_ID_INTEL;
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k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
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k->class_id = PCI_CLASS_STORAGE_IDE;
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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dc->hotpluggable = false;
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}
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static const TypeInfo piix3_ide_info = {
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.name = "piix3-ide",
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.parent = TYPE_PCI_IDE,
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.class_init = piix3_ide_class_init,
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};
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static const TypeInfo piix3_ide_xen_info = {
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.name = "piix3-ide-xen",
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.parent = TYPE_PCI_IDE,
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.class_init = piix3_ide_class_init,
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};
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static void piix4_ide_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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k->realize = pci_piix_ide_realize;
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k->exit = pci_piix_ide_exitfn;
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k->vendor_id = PCI_VENDOR_ID_INTEL;
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k->device_id = PCI_DEVICE_ID_INTEL_82371AB;
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k->class_id = PCI_CLASS_STORAGE_IDE;
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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dc->hotpluggable = false;
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}
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static const TypeInfo piix4_ide_info = {
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.name = "piix4-ide",
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.parent = TYPE_PCI_IDE,
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.class_init = piix4_ide_class_init,
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};
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static void piix_ide_register_types(void)
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{
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type_register_static(&piix3_ide_info);
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type_register_static(&piix3_ide_xen_info);
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type_register_static(&piix4_ide_info);
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}
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type_init(piix_ide_register_types)
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