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qemu/hw/ide/ahci.c
John Snow c27c73aaf9 ahci: Recompute cur_cmd on migrate post load 
When the AHCI HBA device is migrated, all of the information that
led to the request being created is stored in the AHCIDevice
structures, except for pointers into guest data where return
information needs to be stored.

The "cur_cmd" field is usually responsible for this.

To rebuild the cur_cmd pointer post-migration, we can utilize
the busy_slot index to figure out where the command header
we are still processing is.

This allows a machine in a halted state from rerror=stop or
werror=stop to be migrated and resume operations without issue.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1424708286-16483-17-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-03-10 14:02:23 +01:00

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/*
* QEMU AHCI Emulation
*
* Copyright (c) 2010 qiaochong@loongson.cn
* Copyright (c) 2010 Roland Elek <elek.roland@gmail.com>
* Copyright (c) 2010 Sebastian Herbszt <herbszt@gmx.de>
* Copyright (c) 2010 Alexander Graf <agraf@suse.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <hw/hw.h>
#include <hw/pci/msi.h>
#include <hw/i386/pc.h>
#include <hw/pci/pci.h>
#include <hw/sysbus.h>
#include "monitor/monitor.h"
#include "sysemu/block-backend.h"
#include "sysemu/dma.h"
#include "internal.h"
#include <hw/ide/pci.h>
#include <hw/ide/ahci.h>
#define DEBUG_AHCI 0
#define DPRINTF(port, fmt, ...) \
do { \
if (DEBUG_AHCI) { \
fprintf(stderr, "ahci: %s: [%d] ", __func__, port); \
fprintf(stderr, fmt, ## __VA_ARGS__); \
} \
} while (0)
static void check_cmd(AHCIState *s, int port);
static int handle_cmd(AHCIState *s,int port,int slot);
static void ahci_reset_port(AHCIState *s, int port);
static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis);
static void ahci_init_d2h(AHCIDevice *ad);
static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write);
static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes);
static uint32_t ahci_port_read(AHCIState *s, int port, int offset)
{
uint32_t val;
AHCIPortRegs *pr;
pr = &s->dev[port].port_regs;
switch (offset) {
case PORT_LST_ADDR:
val = pr->lst_addr;
break;
case PORT_LST_ADDR_HI:
val = pr->lst_addr_hi;
break;
case PORT_FIS_ADDR:
val = pr->fis_addr;
break;
case PORT_FIS_ADDR_HI:
val = pr->fis_addr_hi;
break;
case PORT_IRQ_STAT:
val = pr->irq_stat;
break;
case PORT_IRQ_MASK:
val = pr->irq_mask;
break;
case PORT_CMD:
val = pr->cmd;
break;
case PORT_TFDATA:
val = pr->tfdata;
break;
case PORT_SIG:
val = pr->sig;
break;
case PORT_SCR_STAT:
if (s->dev[port].port.ifs[0].blk) {
val = SATA_SCR_SSTATUS_DET_DEV_PRESENT_PHY_UP |
SATA_SCR_SSTATUS_SPD_GEN1 | SATA_SCR_SSTATUS_IPM_ACTIVE;
} else {
val = SATA_SCR_SSTATUS_DET_NODEV;
}
break;
case PORT_SCR_CTL:
val = pr->scr_ctl;
break;
case PORT_SCR_ERR:
val = pr->scr_err;
break;
case PORT_SCR_ACT:
pr->scr_act &= ~s->dev[port].finished;
s->dev[port].finished = 0;
val = pr->scr_act;
break;
case PORT_CMD_ISSUE:
val = pr->cmd_issue;
break;
case PORT_RESERVED:
default:
val = 0;
}
DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
return val;
}
static void ahci_irq_raise(AHCIState *s, AHCIDevice *dev)
{
AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
PCIDevice *pci_dev =
(PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE);
DPRINTF(0, "raise irq\n");
if (pci_dev && msi_enabled(pci_dev)) {
msi_notify(pci_dev, 0);
} else {
qemu_irq_raise(s->irq);
}
}
static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev)
{
AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
PCIDevice *pci_dev =
(PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE);
DPRINTF(0, "lower irq\n");
if (!pci_dev || !msi_enabled(pci_dev)) {
qemu_irq_lower(s->irq);
}
}
static void ahci_check_irq(AHCIState *s)
{
int i;
DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus);
s->control_regs.irqstatus = 0;
for (i = 0; i < s->ports; i++) {
AHCIPortRegs *pr = &s->dev[i].port_regs;
if (pr->irq_stat & pr->irq_mask) {
s->control_regs.irqstatus |= (1 << i);
}
}
if (s->control_regs.irqstatus &&
(s->control_regs.ghc & HOST_CTL_IRQ_EN)) {
ahci_irq_raise(s, NULL);
} else {
ahci_irq_lower(s, NULL);
}
}
static void ahci_trigger_irq(AHCIState *s, AHCIDevice *d,
int irq_type)
{
DPRINTF(d->port_no, "trigger irq %#x -> %x\n",
irq_type, d->port_regs.irq_mask & irq_type);
d->port_regs.irq_stat |= irq_type;
ahci_check_irq(s);
}
static void map_page(AddressSpace *as, uint8_t **ptr, uint64_t addr,
uint32_t wanted)
{
hwaddr len = wanted;
if (*ptr) {
dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len);
}
*ptr = dma_memory_map(as, addr, &len, DMA_DIRECTION_FROM_DEVICE);
if (len < wanted) {
dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len);
*ptr = NULL;
}
}
static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val)
{
AHCIPortRegs *pr = &s->dev[port].port_regs;
DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val);
switch (offset) {
case PORT_LST_ADDR:
pr->lst_addr = val;
map_page(s->as, &s->dev[port].lst,
((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
s->dev[port].cur_cmd = NULL;
break;
case PORT_LST_ADDR_HI:
pr->lst_addr_hi = val;
map_page(s->as, &s->dev[port].lst,
((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
s->dev[port].cur_cmd = NULL;
break;
case PORT_FIS_ADDR:
pr->fis_addr = val;
map_page(s->as, &s->dev[port].res_fis,
((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
break;
case PORT_FIS_ADDR_HI:
pr->fis_addr_hi = val;
map_page(s->as, &s->dev[port].res_fis,
((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
break;
case PORT_IRQ_STAT:
pr->irq_stat &= ~val;
ahci_check_irq(s);
break;
case PORT_IRQ_MASK:
pr->irq_mask = val & 0xfdc000ff;
ahci_check_irq(s);
break;
case PORT_CMD:
pr->cmd = val & ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON);
if (pr->cmd & PORT_CMD_START) {
pr->cmd |= PORT_CMD_LIST_ON;
}
if (pr->cmd & PORT_CMD_FIS_RX) {
pr->cmd |= PORT_CMD_FIS_ON;
}
/* XXX usually the FIS would be pending on the bus here and
issuing deferred until the OS enables FIS receival.
Instead, we only submit it once - which works in most
cases, but is a hack. */
if ((pr->cmd & PORT_CMD_FIS_ON) &&
!s->dev[port].init_d2h_sent) {
ahci_init_d2h(&s->dev[port]);
s->dev[port].init_d2h_sent = true;
}
check_cmd(s, port);
break;
case PORT_TFDATA:
/* Read Only. */
break;
case PORT_SIG:
/* Read Only */
break;
case PORT_SCR_STAT:
/* Read Only */
break;
case PORT_SCR_CTL:
if (((pr->scr_ctl & AHCI_SCR_SCTL_DET) == 1) &&
((val & AHCI_SCR_SCTL_DET) == 0)) {
ahci_reset_port(s, port);
}
pr->scr_ctl = val;
break;
case PORT_SCR_ERR:
pr->scr_err &= ~val;
break;
case PORT_SCR_ACT:
/* RW1 */
pr->scr_act |= val;
break;
case PORT_CMD_ISSUE:
pr->cmd_issue |= val;
check_cmd(s, port);
break;
default:
break;
}
}
static uint64_t ahci_mem_read(void *opaque, hwaddr addr,
unsigned size)
{
AHCIState *s = opaque;
uint32_t val = 0;
if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
switch (addr) {
case HOST_CAP:
val = s->control_regs.cap;
break;
case HOST_CTL:
val = s->control_regs.ghc;
break;
case HOST_IRQ_STAT:
val = s->control_regs.irqstatus;
break;
case HOST_PORTS_IMPL:
val = s->control_regs.impl;
break;
case HOST_VERSION:
val = s->control_regs.version;
break;
}
DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val);
} else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
(addr < (AHCI_PORT_REGS_START_ADDR +
(s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
val = ahci_port_read(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
addr & AHCI_PORT_ADDR_OFFSET_MASK);
}
return val;
}
static void ahci_mem_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
AHCIState *s = opaque;
/* Only aligned reads are allowed on AHCI */
if (addr & 3) {
fprintf(stderr, "ahci: Mis-aligned write to addr 0x"
TARGET_FMT_plx "\n", addr);
return;
}
if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) {
DPRINTF(-1, "(addr 0x%08X), val 0x%08"PRIX64"\n", (unsigned) addr, val);
switch (addr) {
case HOST_CAP: /* R/WO, RO */
/* FIXME handle R/WO */
break;
case HOST_CTL: /* R/W */
if (val & HOST_CTL_RESET) {
DPRINTF(-1, "HBA Reset\n");
ahci_reset(s);
} else {
s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN;
ahci_check_irq(s);
}
break;
case HOST_IRQ_STAT: /* R/WC, RO */
s->control_regs.irqstatus &= ~val;
ahci_check_irq(s);
break;
case HOST_PORTS_IMPL: /* R/WO, RO */
/* FIXME handle R/WO */
break;
case HOST_VERSION: /* RO */
/* FIXME report write? */
break;
default:
DPRINTF(-1, "write to unknown register 0x%x\n", (unsigned)addr);
}
} else if ((addr >= AHCI_PORT_REGS_START_ADDR) &&
(addr < (AHCI_PORT_REGS_START_ADDR +
(s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) {
ahci_port_write(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7,
addr & AHCI_PORT_ADDR_OFFSET_MASK, val);
}
}
static const MemoryRegionOps ahci_mem_ops = {
.read = ahci_mem_read,
.write = ahci_mem_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static uint64_t ahci_idp_read(void *opaque, hwaddr addr,
unsigned size)
{
AHCIState *s = opaque;
if (addr == s->idp_offset) {
/* index register */
return s->idp_index;
} else if (addr == s->idp_offset + 4) {
/* data register - do memory read at location selected by index */
return ahci_mem_read(opaque, s->idp_index, size);
} else {
return 0;
}
}
static void ahci_idp_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
AHCIState *s = opaque;
if (addr == s->idp_offset) {
/* index register - mask off reserved bits */
s->idp_index = (uint32_t)val & ((AHCI_MEM_BAR_SIZE - 1) & ~3);
} else if (addr == s->idp_offset + 4) {
/* data register - do memory write at location selected by index */
ahci_mem_write(opaque, s->idp_index, val, size);
}
}
static const MemoryRegionOps ahci_idp_ops = {
.read = ahci_idp_read,
.write = ahci_idp_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void ahci_reg_init(AHCIState *s)
{
int i;
s->control_regs.cap = (s->ports - 1) |
(AHCI_NUM_COMMAND_SLOTS << 8) |
(AHCI_SUPPORTED_SPEED_GEN1 << AHCI_SUPPORTED_SPEED) |
HOST_CAP_NCQ | HOST_CAP_AHCI;
s->control_regs.impl = (1 << s->ports) - 1;
s->control_regs.version = AHCI_VERSION_1_0;
for (i = 0; i < s->ports; i++) {
s->dev[i].port_state = STATE_RUN;
}
}
static void check_cmd(AHCIState *s, int port)
{
AHCIPortRegs *pr = &s->dev[port].port_regs;
int slot;
if ((pr->cmd & PORT_CMD_START) && pr->cmd_issue) {
for (slot = 0; (slot < 32) && pr->cmd_issue; slot++) {
if ((pr->cmd_issue & (1U << slot)) &&
!handle_cmd(s, port, slot)) {
pr->cmd_issue &= ~(1U << slot);
}
}
}
}
static void ahci_check_cmd_bh(void *opaque)
{
AHCIDevice *ad = opaque;
qemu_bh_delete(ad->check_bh);
ad->check_bh = NULL;
if ((ad->busy_slot != -1) &&
!(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) {
/* no longer busy */
ad->port_regs.cmd_issue &= ~(1 << ad->busy_slot);
ad->busy_slot = -1;
}
check_cmd(ad->hba, ad->port_no);
}
static void ahci_init_d2h(AHCIDevice *ad)
{
uint8_t init_fis[20];
IDEState *ide_state = &ad->port.ifs[0];
memset(init_fis, 0, sizeof(init_fis));
init_fis[4] = 1;
init_fis[12] = 1;
if (ide_state->drive_kind == IDE_CD) {
init_fis[5] = ide_state->lcyl;
init_fis[6] = ide_state->hcyl;
}
ahci_write_fis_d2h(ad, init_fis);
}
static void ahci_reset_port(AHCIState *s, int port)
{
AHCIDevice *d = &s->dev[port];
AHCIPortRegs *pr = &d->port_regs;
IDEState *ide_state = &d->port.ifs[0];
int i;
DPRINTF(port, "reset port\n");
ide_bus_reset(&d->port);
ide_state->ncq_queues = AHCI_MAX_CMDS;
pr->scr_stat = 0;
pr->scr_err = 0;
pr->scr_act = 0;
pr->tfdata = 0x7F;
pr->sig = 0xFFFFFFFF;
d->busy_slot = -1;
d->init_d2h_sent = false;
ide_state = &s->dev[port].port.ifs[0];
if (!ide_state->blk) {
return;
}
/* reset ncq queue */
for (i = 0; i < AHCI_MAX_CMDS; i++) {
NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[i];
if (!ncq_tfs->used) {
continue;
}
if (ncq_tfs->aiocb) {
blk_aio_cancel(ncq_tfs->aiocb);
ncq_tfs->aiocb = NULL;
}
/* Maybe we just finished the request thanks to blk_aio_cancel() */
if (!ncq_tfs->used) {
continue;
}
qemu_sglist_destroy(&ncq_tfs->sglist);
ncq_tfs->used = 0;
}
s->dev[port].port_state = STATE_RUN;
if (!ide_state->blk) {
pr->sig = 0;
ide_state->status = SEEK_STAT | WRERR_STAT;
} else if (ide_state->drive_kind == IDE_CD) {
pr->sig = SATA_SIGNATURE_CDROM;
ide_state->lcyl = 0x14;
ide_state->hcyl = 0xeb;
DPRINTF(port, "set lcyl = %d\n", ide_state->lcyl);
ide_state->status = SEEK_STAT | WRERR_STAT | READY_STAT;
} else {
pr->sig = SATA_SIGNATURE_DISK;
ide_state->status = SEEK_STAT | WRERR_STAT;
}
ide_state->error = 1;
ahci_init_d2h(d);
}
static void debug_print_fis(uint8_t *fis, int cmd_len)
{
#if DEBUG_AHCI
int i;
fprintf(stderr, "fis:");
for (i = 0; i < cmd_len; i++) {
if ((i & 0xf) == 0) {
fprintf(stderr, "\n%02x:",i);
}
fprintf(stderr, "%02x ",fis[i]);
}
fprintf(stderr, "\n");
#endif
}
static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished)
{
AHCIDevice *ad = &s->dev[port];
AHCIPortRegs *pr = &ad->port_regs;
IDEState *ide_state;
SDBFIS *sdb_fis;
if (!s->dev[port].res_fis ||
!(pr->cmd & PORT_CMD_FIS_RX)) {
return;
}
sdb_fis = (SDBFIS *)&ad->res_fis[RES_FIS_SDBFIS];
ide_state = &ad->port.ifs[0];
sdb_fis->type = SATA_FIS_TYPE_SDB;
/* Interrupt pending & Notification bit */
sdb_fis->flags = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
sdb_fis->status = ide_state->status & 0x77;
sdb_fis->error = ide_state->error;
/* update SAct field in SDB_FIS */
s->dev[port].finished |= finished;
sdb_fis->payload = cpu_to_le32(ad->finished);
/* Update shadow registers (except BSY 0x80 and DRQ 0x08) */
pr->tfdata = (ad->port.ifs[0].error << 8) |
(ad->port.ifs[0].status & 0x77) |
(pr->tfdata & 0x88);
ahci_trigger_irq(s, ad, PORT_IRQ_SDB_FIS);
}
static void ahci_write_fis_pio(AHCIDevice *ad, uint16_t len)
{
AHCIPortRegs *pr = &ad->port_regs;
uint8_t *pio_fis, *cmd_fis;
uint64_t tbl_addr;
dma_addr_t cmd_len = 0x80;
IDEState *s = &ad->port.ifs[0];
if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
return;
}
/* map cmd_fis */
tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr);
cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len,
DMA_DIRECTION_TO_DEVICE);
if (cmd_fis == NULL) {
DPRINTF(ad->port_no, "dma_memory_map failed in ahci_write_fis_pio");
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR);
return;
}
if (cmd_len != 0x80) {
DPRINTF(ad->port_no,
"dma_memory_map mapped too few bytes in ahci_write_fis_pio");
dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
DMA_DIRECTION_TO_DEVICE, cmd_len);
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR);
return;
}
pio_fis = &ad->res_fis[RES_FIS_PSFIS];
pio_fis[0] = SATA_FIS_TYPE_PIO_SETUP;
pio_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
pio_fis[2] = s->status;
pio_fis[3] = s->error;
pio_fis[4] = s->sector;
pio_fis[5] = s->lcyl;
pio_fis[6] = s->hcyl;
pio_fis[7] = s->select;
pio_fis[8] = s->hob_sector;
pio_fis[9] = s->hob_lcyl;
pio_fis[10] = s->hob_hcyl;
pio_fis[11] = 0;
pio_fis[12] = cmd_fis[12];
pio_fis[13] = cmd_fis[13];
pio_fis[14] = 0;
pio_fis[15] = s->status;
pio_fis[16] = len & 255;
pio_fis[17] = len >> 8;
pio_fis[18] = 0;
pio_fis[19] = 0;
/* Update shadow registers: */
pr->tfdata = (ad->port.ifs[0].error << 8) |
ad->port.ifs[0].status;
if (pio_fis[2] & ERR_STAT) {
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR);
}
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_PIOS_FIS);
dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
DMA_DIRECTION_TO_DEVICE, cmd_len);
}
static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
{
AHCIPortRegs *pr = &ad->port_regs;
uint8_t *d2h_fis;
int i;
dma_addr_t cmd_len = 0x80;
int cmd_mapped = 0;
IDEState *s = &ad->port.ifs[0];
if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
return;
}
if (!cmd_fis) {
/* map cmd_fis */
uint64_t tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr);
cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len,
DMA_DIRECTION_TO_DEVICE);
cmd_mapped = 1;
}
d2h_fis = &ad->res_fis[RES_FIS_RFIS];
d2h_fis[0] = SATA_FIS_TYPE_REGISTER_D2H;
d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
d2h_fis[2] = s->status;
d2h_fis[3] = s->error;
d2h_fis[4] = s->sector;
d2h_fis[5] = s->lcyl;
d2h_fis[6] = s->hcyl;
d2h_fis[7] = s->select;
d2h_fis[8] = s->hob_sector;
d2h_fis[9] = s->hob_lcyl;
d2h_fis[10] = s->hob_hcyl;
d2h_fis[11] = 0;
d2h_fis[12] = cmd_fis[12];
d2h_fis[13] = cmd_fis[13];
for (i = 14; i < 20; i++) {
d2h_fis[i] = 0;
}
/* Update shadow registers: */
pr->tfdata = (ad->port.ifs[0].error << 8) |
ad->port.ifs[0].status;
if (d2h_fis[2] & ERR_STAT) {
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR);
}
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS);
if (cmd_mapped) {
dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len,
DMA_DIRECTION_TO_DEVICE, cmd_len);
}
}
static int prdt_tbl_entry_size(const AHCI_SG *tbl)
{
return (le32_to_cpu(tbl->flags_size) & AHCI_PRDT_SIZE_MASK) + 1;
}
static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist,
int32_t offset)
{
AHCICmdHdr *cmd = ad->cur_cmd;
uint32_t opts = le32_to_cpu(cmd->opts);
uint64_t prdt_addr = le64_to_cpu(cmd->tbl_addr) + 0x80;
int sglist_alloc_hint = opts >> AHCI_CMD_HDR_PRDT_LEN;
dma_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG));
dma_addr_t real_prdt_len = prdt_len;
uint8_t *prdt;
int i;
int r = 0;
uint64_t sum = 0;
int off_idx = -1;
int64_t off_pos = -1;
int tbl_entry_size;
IDEBus *bus = &ad->port;
BusState *qbus = BUS(bus);
/*
* Note: AHCI PRDT can describe up to 256GiB. SATA/ATA only support
* transactions of up to 32MiB as of ATA8-ACS3 rev 1b, assuming a
* 512 byte sector size. We limit the PRDT in this implementation to
* a reasonably large 2GiB, which can accommodate the maximum transfer
* request for sector sizes up to 32K.
*/
if (!sglist_alloc_hint) {
DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts);
return -1;
}
/* map PRDT */
if (!(prdt = dma_memory_map(ad->hba->as, prdt_addr, &prdt_len,
DMA_DIRECTION_TO_DEVICE))){
DPRINTF(ad->port_no, "map failed\n");
return -1;
}
if (prdt_len < real_prdt_len) {
DPRINTF(ad->port_no, "mapped less than expected\n");
r = -1;
goto out;
}
/* Get entries in the PRDT, init a qemu sglist accordingly */
if (sglist_alloc_hint > 0) {
AHCI_SG *tbl = (AHCI_SG *)prdt;
sum = 0;
for (i = 0; i < sglist_alloc_hint; i++) {
/* flags_size is zero-based */
tbl_entry_size = prdt_tbl_entry_size(&tbl[i]);
if (offset <= (sum + tbl_entry_size)) {
off_idx = i;
off_pos = offset - sum;
break;
}
sum += tbl_entry_size;
}
if ((off_idx == -1) || (off_pos < 0) || (off_pos > tbl_entry_size)) {
DPRINTF(ad->port_no, "%s: Incorrect offset! "
"off_idx: %d, off_pos: %"PRId64"\n",
__func__, off_idx, off_pos);
r = -1;
goto out;
}
qemu_sglist_init(sglist, qbus->parent, (sglist_alloc_hint - off_idx),
ad->hba->as);
qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr + off_pos),
prdt_tbl_entry_size(&tbl[off_idx]) - off_pos);
for (i = off_idx + 1; i < sglist_alloc_hint; i++) {
/* flags_size is zero-based */
qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr),
prdt_tbl_entry_size(&tbl[i]));
if (sglist->size > INT32_MAX) {
error_report("AHCI Physical Region Descriptor Table describes "
"more than 2 GiB.\n");
qemu_sglist_destroy(sglist);
r = -1;
goto out;
}
}
}
out:
dma_memory_unmap(ad->hba->as, prdt, prdt_len,
DMA_DIRECTION_TO_DEVICE, prdt_len);
return r;
}
static void ncq_cb(void *opaque, int ret)
{
NCQTransferState *ncq_tfs = (NCQTransferState *)opaque;
IDEState *ide_state = &ncq_tfs->drive->port.ifs[0];
if (ret == -ECANCELED) {
return;
}
/* Clear bit for this tag in SActive */
ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag);
if (ret < 0) {
/* error */
ide_state->error = ABRT_ERR;
ide_state->status = READY_STAT | ERR_STAT;
ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
} else {
ide_state->status = READY_STAT | SEEK_STAT;
}
ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no,
(1 << ncq_tfs->tag));
DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n",
ncq_tfs->tag);
block_acct_done(blk_get_stats(ncq_tfs->drive->port.ifs[0].blk),
&ncq_tfs->acct);
qemu_sglist_destroy(&ncq_tfs->sglist);
ncq_tfs->used = 0;
}
static int is_ncq(uint8_t ata_cmd)
{
/* Based on SATA 3.2 section 13.6.3.2 */
switch (ata_cmd) {
case READ_FPDMA_QUEUED:
case WRITE_FPDMA_QUEUED:
case NCQ_NON_DATA:
case RECEIVE_FPDMA_QUEUED:
case SEND_FPDMA_QUEUED:
return 1;
default:
return 0;
}
}
static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis,
int slot)
{
NCQFrame *ncq_fis = (NCQFrame*)cmd_fis;
uint8_t tag = ncq_fis->tag >> 3;
NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[tag];
if (ncq_tfs->used) {
/* error - already in use */
fprintf(stderr, "%s: tag %d already used\n", __FUNCTION__, tag);
return;
}
ncq_tfs->used = 1;
ncq_tfs->drive = &s->dev[port];
ncq_tfs->slot = slot;
ncq_tfs->lba = ((uint64_t)ncq_fis->lba5 << 40) |
((uint64_t)ncq_fis->lba4 << 32) |
((uint64_t)ncq_fis->lba3 << 24) |
((uint64_t)ncq_fis->lba2 << 16) |
((uint64_t)ncq_fis->lba1 << 8) |
(uint64_t)ncq_fis->lba0;
/* Note: We calculate the sector count, but don't currently rely on it.
* The total size of the DMA buffer tells us the transfer size instead. */
ncq_tfs->sector_count = ((uint16_t)ncq_fis->sector_count_high << 8) |
ncq_fis->sector_count_low;
DPRINTF(port, "NCQ transfer LBA from %"PRId64" to %"PRId64", "
"drive max %"PRId64"\n",
ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 2,
s->dev[port].port.ifs[0].nb_sectors - 1);
ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist, 0);
ncq_tfs->tag = tag;
switch(ncq_fis->command) {
case READ_FPDMA_QUEUED:
DPRINTF(port, "NCQ reading %d sectors from LBA %"PRId64", "
"tag %d\n",
ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
DPRINTF(port, "tag %d aio read %"PRId64"\n",
ncq_tfs->tag, ncq_tfs->lba);
dma_acct_start(ncq_tfs->drive->port.ifs[0].blk, &ncq_tfs->acct,
&ncq_tfs->sglist, BLOCK_ACCT_READ);
ncq_tfs->aiocb = dma_blk_read(ncq_tfs->drive->port.ifs[0].blk,
&ncq_tfs->sglist, ncq_tfs->lba,
ncq_cb, ncq_tfs);
break;
case WRITE_FPDMA_QUEUED:
DPRINTF(port, "NCQ writing %d sectors to LBA %"PRId64", tag %d\n",
ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
DPRINTF(port, "tag %d aio write %"PRId64"\n",
ncq_tfs->tag, ncq_tfs->lba);
dma_acct_start(ncq_tfs->drive->port.ifs[0].blk, &ncq_tfs->acct,
&ncq_tfs->sglist, BLOCK_ACCT_WRITE);
ncq_tfs->aiocb = dma_blk_write(ncq_tfs->drive->port.ifs[0].blk,
&ncq_tfs->sglist, ncq_tfs->lba,
ncq_cb, ncq_tfs);
break;
default:
if (is_ncq(cmd_fis[2])) {
DPRINTF(port,
"error: unsupported NCQ command (0x%02x) received\n",
cmd_fis[2]);
} else {
DPRINTF(port,
"error: tried to process non-NCQ command as NCQ\n");
}
qemu_sglist_destroy(&ncq_tfs->sglist);
}
}
static void handle_reg_h2d_fis(AHCIState *s, int port,
int slot, uint8_t *cmd_fis)
{
IDEState *ide_state = &s->dev[port].port.ifs[0];
AHCICmdHdr *cmd = s->dev[port].cur_cmd;
uint32_t opts = le32_to_cpu(cmd->opts);
if (cmd_fis[1] & 0x0F) {
DPRINTF(port, "Port Multiplier not supported."
" cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
cmd_fis[0], cmd_fis[1], cmd_fis[2]);
return;
}
if (cmd_fis[1] & 0x70) {
DPRINTF(port, "Reserved flags set in H2D Register FIS."
" cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
cmd_fis[0], cmd_fis[1], cmd_fis[2]);
return;
}
if (!(cmd_fis[1] & SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER)) {
switch (s->dev[port].port_state) {
case STATE_RUN:
if (cmd_fis[15] & ATA_SRST) {
s->dev[port].port_state = STATE_RESET;
}
break;
case STATE_RESET:
if (!(cmd_fis[15] & ATA_SRST)) {
ahci_reset_port(s, port);
}
break;
}
return;
}
/* Check for NCQ command */
if (is_ncq(cmd_fis[2])) {
process_ncq_command(s, port, cmd_fis, slot);
return;
}
/* Decompose the FIS:
* AHCI does not interpret FIS packets, it only forwards them.
* SATA 1.0 describes how to decode LBA28 and CHS FIS packets.
* Later specifications, e.g, SATA 3.2, describe LBA48 FIS packets.
*
* ATA4 describes sector number for LBA28/CHS commands.
* ATA6 describes sector number for LBA48 commands.
* ATA8 deprecates CHS fully, describing only LBA28/48.
*
* We dutifully convert the FIS into IDE registers, and allow the
* core layer to interpret them as needed. */
ide_state->feature = cmd_fis[3];
ide_state->sector = cmd_fis[4]; /* LBA 7:0 */
ide_state->lcyl = cmd_fis[5]; /* LBA 15:8 */
ide_state->hcyl = cmd_fis[6]; /* LBA 23:16 */
ide_state->select = cmd_fis[7]; /* LBA 27:24 (LBA28) */
ide_state->hob_sector = cmd_fis[8]; /* LBA 31:24 */
ide_state->hob_lcyl = cmd_fis[9]; /* LBA 39:32 */
ide_state->hob_hcyl = cmd_fis[10]; /* LBA 47:40 */
ide_state->hob_feature = cmd_fis[11];
ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]);
/* 14, 16, 17, 18, 19: Reserved (SATA 1.0) */
/* 15: Only valid when UPDATE_COMMAND not set. */
/* Copy the ACMD field (ATAPI packet, if any) from the AHCI command
* table to ide_state->io_buffer */
if (opts & AHCI_CMD_ATAPI) {
memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10);
debug_print_fis(ide_state->io_buffer, 0x10);
s->dev[port].done_atapi_packet = false;
/* XXX send PIO setup FIS */
}
ide_state->error = 0;
/* Reset transferred byte counter */
cmd->status = 0;
/* We're ready to process the command in FIS byte 2. */
ide_exec_cmd(&s->dev[port].port, cmd_fis[2]);
}
static int handle_cmd(AHCIState *s, int port, int slot)
{
IDEState *ide_state;
uint64_t tbl_addr;
AHCICmdHdr *cmd;
uint8_t *cmd_fis;
dma_addr_t cmd_len;
if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
/* Engine currently busy, try again later */
DPRINTF(port, "engine busy\n");
return -1;
}
if (!s->dev[port].lst) {
DPRINTF(port, "error: lst not given but cmd handled");
return -1;
}
cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot];
/* remember current slot handle for later */
s->dev[port].cur_cmd = cmd;
/* The device we are working for */
ide_state = &s->dev[port].port.ifs[0];
if (!ide_state->blk) {
DPRINTF(port, "error: guest accessed unused port");
return -1;
}
tbl_addr = le64_to_cpu(cmd->tbl_addr);
cmd_len = 0x80;
cmd_fis = dma_memory_map(s->as, tbl_addr, &cmd_len,
DMA_DIRECTION_FROM_DEVICE);
if (!cmd_fis) {
DPRINTF(port, "error: guest passed us an invalid cmd fis\n");
return -1;
} else if (cmd_len != 0x80) {
ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_HBUS_ERR);
DPRINTF(port, "error: dma_memory_map failed: "
"(len(%02"PRIx64") != 0x80)\n",
cmd_len);
goto out;
}
debug_print_fis(cmd_fis, 0x80);
switch (cmd_fis[0]) {
case SATA_FIS_TYPE_REGISTER_H2D:
handle_reg_h2d_fis(s, port, slot, cmd_fis);
break;
default:
DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x "
"cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1],
cmd_fis[2]);
break;
}
out:
dma_memory_unmap(s->as, cmd_fis, cmd_len, DMA_DIRECTION_FROM_DEVICE,
cmd_len);
if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
/* async command, complete later */
s->dev[port].busy_slot = slot;
return -1;
}
/* done handling the command */
return 0;
}
/* DMA dev <-> ram */
static void ahci_start_transfer(IDEDMA *dma)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
uint32_t size = (uint32_t)(s->data_end - s->data_ptr);
/* write == ram -> device */
uint32_t opts = le32_to_cpu(ad->cur_cmd->opts);
int is_write = opts & AHCI_CMD_WRITE;
int is_atapi = opts & AHCI_CMD_ATAPI;
int has_sglist = 0;
if (is_atapi && !ad->done_atapi_packet) {
/* already prepopulated iobuffer */
ad->done_atapi_packet = true;
size = 0;
goto out;
}
if (ahci_dma_prepare_buf(dma, is_write)) {
has_sglist = 1;
}
DPRINTF(ad->port_no, "%sing %d bytes on %s w/%s sglist\n",
is_write ? "writ" : "read", size, is_atapi ? "atapi" : "ata",
has_sglist ? "" : "o");
if (has_sglist && size) {
if (is_write) {
dma_buf_write(s->data_ptr, size, &s->sg);
} else {
dma_buf_read(s->data_ptr, size, &s->sg);
}
}
out:
/* declare that we processed everything */
s->data_ptr = s->data_end;
/* Update number of transferred bytes, destroy sglist */
ahci_commit_buf(dma, size);
s->end_transfer_func(s);
if (!(s->status & DRQ_STAT)) {
/* done with PIO send/receive */
ahci_write_fis_pio(ad, le32_to_cpu(ad->cur_cmd->status));
}
}
static void ahci_start_dma(IDEDMA *dma, IDEState *s,
BlockCompletionFunc *dma_cb)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
DPRINTF(ad->port_no, "\n");
s->io_buffer_offset = 0;
dma_cb(s, 0);
}
static void ahci_restart_dma(IDEDMA *dma)
{
/* Nothing to do, ahci_start_dma already resets s->io_buffer_offset. */
}
/**
* Called in DMA R/W chains to read the PRDT, utilizing ahci_populate_sglist.
* Not currently invoked by PIO R/W chains,
* which invoke ahci_populate_sglist via ahci_start_transfer.
*/
static int32_t ahci_dma_prepare_buf(IDEDMA *dma, int is_write)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
if (ahci_populate_sglist(ad, &s->sg, s->io_buffer_offset) == -1) {
DPRINTF(ad->port_no, "ahci_dma_prepare_buf failed.\n");
return -1;
}
s->io_buffer_size = s->sg.size;
DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size);
return s->io_buffer_size;
}
/**
* Destroys the scatter-gather list,
* and updates the command header with a bytes-read value.
* called explicitly via ahci_dma_rw_buf (ATAPI DMA),
* and ahci_start_transfer (PIO R/W),
* and called via callback from ide_dma_cb for DMA R/W paths.
*/
static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
tx_bytes += le32_to_cpu(ad->cur_cmd->status);
ad->cur_cmd->status = cpu_to_le32(tx_bytes);
qemu_sglist_destroy(&s->sg);
}
static int ahci_dma_rw_buf(IDEDMA *dma, int is_write)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
uint8_t *p = s->io_buffer + s->io_buffer_index;
int l = s->io_buffer_size - s->io_buffer_index;
if (ahci_populate_sglist(ad, &s->sg, s->io_buffer_offset)) {
return 0;
}
if (is_write) {
dma_buf_read(p, l, &s->sg);
} else {
dma_buf_write(p, l, &s->sg);
}
/* free sglist, update byte count */
ahci_commit_buf(dma, l);
s->io_buffer_index += l;
s->io_buffer_offset += l;
DPRINTF(ad->port_no, "len=%#x\n", l);
return 1;
}
static void ahci_cmd_done(IDEDMA *dma)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
DPRINTF(ad->port_no, "cmd done\n");
/* update d2h status */
ahci_write_fis_d2h(ad, NULL);
if (!ad->check_bh) {
/* maybe we still have something to process, check later */
ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad);
qemu_bh_schedule(ad->check_bh);
}
}
static void ahci_irq_set(void *opaque, int n, int level)
{
}
static const IDEDMAOps ahci_dma_ops = {
.start_dma = ahci_start_dma,
.restart_dma = ahci_restart_dma,
.start_transfer = ahci_start_transfer,
.prepare_buf = ahci_dma_prepare_buf,
.commit_buf = ahci_commit_buf,
.rw_buf = ahci_dma_rw_buf,
.cmd_done = ahci_cmd_done,
};
void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports)
{
qemu_irq *irqs;
int i;
s->as = as;
s->ports = ports;
s->dev = g_new0(AHCIDevice, ports);
ahci_reg_init(s);
/* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
memory_region_init_io(&s->mem, OBJECT(qdev), &ahci_mem_ops, s,
"ahci", AHCI_MEM_BAR_SIZE);
memory_region_init_io(&s->idp, OBJECT(qdev), &ahci_idp_ops, s,
"ahci-idp", 32);
irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports);
for (i = 0; i < s->ports; i++) {
AHCIDevice *ad = &s->dev[i];
ide_bus_new(&ad->port, sizeof(ad->port), qdev, i, 1);
ide_init2(&ad->port, irqs[i]);
ad->hba = s;
ad->port_no = i;
ad->port.dma = &ad->dma;
ad->port.dma->ops = &ahci_dma_ops;
ide_register_restart_cb(&ad->port);
}
}
void ahci_uninit(AHCIState *s)
{
g_free(s->dev);
}
void ahci_reset(AHCIState *s)
{
AHCIPortRegs *pr;
int i;
s->control_regs.irqstatus = 0;
/* AHCI Enable (AE)
* The implementation of this bit is dependent upon the value of the
* CAP.SAM bit. If CAP.SAM is '0', then GHC.AE shall be read-write and
* shall have a reset value of '0'. If CAP.SAM is '1', then AE shall be
* read-only and shall have a reset value of '1'.
*
* We set HOST_CAP_AHCI so we must enable AHCI at reset.
*/
s->control_regs.ghc = HOST_CTL_AHCI_EN;
for (i = 0; i < s->ports; i++) {
pr = &s->dev[i].port_regs;
pr->irq_stat = 0;
pr->irq_mask = 0;
pr->scr_ctl = 0;
pr->cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON;
ahci_reset_port(s, i);
}
}
static const VMStateDescription vmstate_ahci_device = {
.name = "ahci port",
.version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_IDE_BUS(port, AHCIDevice),
VMSTATE_IDE_DRIVE(port.ifs[0], AHCIDevice),
VMSTATE_UINT32(port_state, AHCIDevice),
VMSTATE_UINT32(finished, AHCIDevice),
VMSTATE_UINT32(port_regs.lst_addr, AHCIDevice),
VMSTATE_UINT32(port_regs.lst_addr_hi, AHCIDevice),
VMSTATE_UINT32(port_regs.fis_addr, AHCIDevice),
VMSTATE_UINT32(port_regs.fis_addr_hi, AHCIDevice),
VMSTATE_UINT32(port_regs.irq_stat, AHCIDevice),
VMSTATE_UINT32(port_regs.irq_mask, AHCIDevice),
VMSTATE_UINT32(port_regs.cmd, AHCIDevice),
VMSTATE_UINT32(port_regs.tfdata, AHCIDevice),
VMSTATE_UINT32(port_regs.sig, AHCIDevice),
VMSTATE_UINT32(port_regs.scr_stat, AHCIDevice),
VMSTATE_UINT32(port_regs.scr_ctl, AHCIDevice),
VMSTATE_UINT32(port_regs.scr_err, AHCIDevice),
VMSTATE_UINT32(port_regs.scr_act, AHCIDevice),
VMSTATE_UINT32(port_regs.cmd_issue, AHCIDevice),
VMSTATE_BOOL(done_atapi_packet, AHCIDevice),
VMSTATE_INT32(busy_slot, AHCIDevice),
VMSTATE_BOOL(init_d2h_sent, AHCIDevice),
VMSTATE_END_OF_LIST()
},
};
static int ahci_state_post_load(void *opaque, int version_id)
{
int i;
struct AHCIDevice *ad;
AHCIState *s = opaque;
for (i = 0; i < s->ports; i++) {
ad = &s->dev[i];
AHCIPortRegs *pr = &ad->port_regs;
map_page(s->as, &ad->lst,
((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024);
map_page(s->as, &ad->res_fis,
((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
/*
* If an error is present, ad->busy_slot will be valid and not -1.
* In this case, an operation is waiting to resume and will re-check
* for additional AHCI commands to execute upon completion.
*
* In the case where no error was present, busy_slot will be -1,
* and we should check to see if there are additional commands waiting.
*/
if (ad->busy_slot == -1) {
check_cmd(s, i);
} else {
/* We are in the middle of a command, and may need to access
* the command header in guest memory again. */
if (ad->busy_slot < 0 || ad->busy_slot >= AHCI_MAX_CMDS) {
return -1;
}
ad->cur_cmd = &((AHCICmdHdr *)ad->lst)[ad->busy_slot];
}
}
return 0;
}
const VMStateDescription vmstate_ahci = {
.name = "ahci",
.version_id = 1,
.post_load = ahci_state_post_load,
.fields = (VMStateField[]) {
VMSTATE_STRUCT_VARRAY_POINTER_INT32(dev, AHCIState, ports,
vmstate_ahci_device, AHCIDevice),
VMSTATE_UINT32(control_regs.cap, AHCIState),
VMSTATE_UINT32(control_regs.ghc, AHCIState),
VMSTATE_UINT32(control_regs.irqstatus, AHCIState),
VMSTATE_UINT32(control_regs.impl, AHCIState),
VMSTATE_UINT32(control_regs.version, AHCIState),
VMSTATE_UINT32(idp_index, AHCIState),
VMSTATE_INT32_EQUAL(ports, AHCIState),
VMSTATE_END_OF_LIST()
},
};
#define TYPE_SYSBUS_AHCI "sysbus-ahci"
#define SYSBUS_AHCI(obj) OBJECT_CHECK(SysbusAHCIState, (obj), TYPE_SYSBUS_AHCI)
typedef struct SysbusAHCIState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
AHCIState ahci;
uint32_t num_ports;
} SysbusAHCIState;
static const VMStateDescription vmstate_sysbus_ahci = {
.name = "sysbus-ahci",
.unmigratable = 1, /* Still buggy under I/O load */
.fields = (VMStateField[]) {
VMSTATE_AHCI(ahci, SysbusAHCIState),
VMSTATE_END_OF_LIST()
},
};
static void sysbus_ahci_reset(DeviceState *dev)
{
SysbusAHCIState *s = SYSBUS_AHCI(dev);
ahci_reset(&s->ahci);
}
static void sysbus_ahci_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
SysbusAHCIState *s = SYSBUS_AHCI(dev);
ahci_init(&s->ahci, dev, &address_space_memory, s->num_ports);
sysbus_init_mmio(sbd, &s->ahci.mem);
sysbus_init_irq(sbd, &s->ahci.irq);
}
static Property sysbus_ahci_properties[] = {
DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, num_ports, 1),
DEFINE_PROP_END_OF_LIST(),
};
static void sysbus_ahci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = sysbus_ahci_realize;
dc->vmsd = &vmstate_sysbus_ahci;
dc->props = sysbus_ahci_properties;
dc->reset = sysbus_ahci_reset;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
}
static const TypeInfo sysbus_ahci_info = {
.name = TYPE_SYSBUS_AHCI,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SysbusAHCIState),
.class_init = sysbus_ahci_class_init,
};
static void sysbus_ahci_register_types(void)
{
type_register_static(&sysbus_ahci_info);
}
type_init(sysbus_ahci_register_types)
void ahci_ide_create_devs(PCIDevice *dev, DriveInfo **hd)
{
AHCIPCIState *d = ICH_AHCI(dev);
AHCIState *ahci = &d->ahci;
int i;
for (i = 0; i < ahci->ports; i++) {
if (hd[i] == NULL) {
continue;
}
ide_create_drive(&ahci->dev[i].port, 0, hd[i]);
}
}
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