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qemu/hw/ide/ahci.c
Alexander Graf 1fddfba129 ahci: Fix non-NCQ accesses for LBA > 16bits 
AHCI provides two ways of reading/writing data:

 1) NCQ
 2) ATA commands with the LBA in the command FIS

In the second code path, we didn't handle any LBAs that were bigger than
16 bits, so whenever a guest that used high LBA numbers wanted to access
data, the LBA got truncated down to 16 bits, giving the guest garbage.

This patch adds support for LBAs higher than 16 bits. I've tested that it
works just fine with SeaBIOS and Linux guests. This patch also unbreaks
the often reported grub errors people have seen with AHCI.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-05-19 12:08:28 +02:00

1169 lines
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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/msi.h>
#include <hw/pc.h>
#include <hw/pci.h>
#include "monitor.h"
#include "dma.h"
#include "cpu-common.h"
#include "internal.h"
#include <hw/ide/pci.h>
#include <hw/ide/ahci.h>
/* #define DEBUG_AHCI */
#ifdef DEBUG_AHCI
#define DPRINTF(port, fmt, ...) \
do { fprintf(stderr, "ahci: %s: [%d] ", __FUNCTION__, port); \
fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(port, fmt, ...) do {} while(0)
#endif
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 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 = ((uint16_t)s->dev[port].port.ifs[0].error << 8) |
s->dev[port].port.ifs[0].status;
break;
case PORT_SIG:
val = pr->sig;
break;
case PORT_SCR_STAT:
if (s->dev[port].port.ifs[0].bs) {
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)
{
struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
DPRINTF(0, "raise irq\n");
if (msi_enabled(&d->card)) {
msi_notify(&d->card, 0);
} else {
qemu_irq_raise(s->irq);
}
}
static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev)
{
struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci);
DPRINTF(0, "lower irq\n");
if (!msi_enabled(&d->card)) {
qemu_irq_lower(s->irq);
}
}
static void ahci_check_irq(AHCIState *s)
{
int i;
DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus);
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(uint8_t **ptr, uint64_t addr, uint32_t wanted)
{
target_phys_addr_t len = wanted;
if (*ptr) {
cpu_physical_memory_unmap(*ptr, len, 1, len);
}
*ptr = cpu_physical_memory_map(addr, &len, 1);
if (len < wanted) {
cpu_physical_memory_unmap(*ptr, len, 1, 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->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->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->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->dev[port].res_fis,
((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
break;
case PORT_IRQ_STAT:
pr->irq_stat &= ~val;
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 = 1;
}
check_cmd(s, port);
break;
case PORT_TFDATA:
s->dev[port].port.ifs[0].error = (val >> 8) & 0xff;
s->dev[port].port.ifs[0].status = val & 0xff;
break;
case PORT_SIG:
pr->sig = val;
break;
case PORT_SCR_STAT:
pr->scr_stat = val;
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 uint32_t ahci_mem_readl(void *ptr, target_phys_addr_t addr)
{
AHCIState *s = ptr;
uint32_t val = 0;
addr = addr & 0xfff;
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_writel(void *ptr, target_phys_addr_t addr, uint32_t val)
{
AHCIState *s = ptr;
addr = addr & 0xfff;
/* 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%08X\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(container_of(s, AHCIPCIState, ahci));
} 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 CPUReadMemoryFunc * const ahci_readfn[3]={
ahci_mem_readl,
ahci_mem_readl,
ahci_mem_readl
};
static CPUWriteMemoryFunc * const ahci_writefn[3]={
ahci_mem_writel,
ahci_mem_writel,
ahci_mem_writel
};
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 uint32_t read_from_sglist(uint8_t *buffer, uint32_t len,
QEMUSGList *sglist)
{
uint32_t i = 0;
uint32_t total = 0, once;
ScatterGatherEntry *cur_prd;
uint32_t sgcount;
cur_prd = sglist->sg;
sgcount = sglist->nsg;
for (i = 0; len && sgcount; i++) {
once = MIN(cur_prd->len, len);
cpu_physical_memory_read(cur_prd->base, buffer, once);
cur_prd++;
sgcount--;
len -= once;
buffer += once;
total += once;
}
return total;
}
static uint32_t write_to_sglist(uint8_t *buffer, uint32_t len,
QEMUSGList *sglist)
{
uint32_t i = 0;
uint32_t total = 0, once;
ScatterGatherEntry *cur_prd;
uint32_t sgcount;
DPRINTF(-1, "total: 0x%x bytes\n", len);
cur_prd = sglist->sg;
sgcount = sglist->nsg;
for (i = 0; len && sgcount; i++) {
once = MIN(cur_prd->len, len);
DPRINTF(-1, "write 0x%x bytes to 0x%lx\n", once, (long)cur_prd->base);
cpu_physical_memory_write(cur_prd->base, buffer, once);
cur_prd++;
sgcount--;
len -= once;
buffer += once;
total += once;
}
return total;
}
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 & (1 << slot)) &&
!handle_cmd(s, port, slot)) {
pr->cmd_issue &= ~(1 << 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[0x20];
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->irq_stat = 0;
pr->irq_mask = 0;
pr->scr_stat = 0;
pr->scr_ctl = 0;
pr->scr_err = 0;
pr->scr_act = 0;
d->busy_slot = -1;
d->init_d2h_sent = 0;
ide_state = &s->dev[port].port.ifs[0];
if (!ide_state->bs) {
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) {
bdrv_aio_cancel(ncq_tfs->aiocb);
ncq_tfs->aiocb = NULL;
}
qemu_sglist_destroy(&ncq_tfs->sglist);
ncq_tfs->used = 0;
}
s->dev[port].port_state = STATE_RUN;
if (!ide_state->bs) {
s->dev[port].port_regs.sig = 0;
ide_state->status = SEEK_STAT | WRERR_STAT;
} else if (ide_state->drive_kind == IDE_CD) {
s->dev[port].port_regs.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 {
s->dev[port].port_regs.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)
{
#ifdef 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)
{
AHCIPortRegs *pr = &s->dev[port].port_regs;
IDEState *ide_state;
uint8_t *sdb_fis;
if (!s->dev[port].res_fis ||
!(pr->cmd & PORT_CMD_FIS_RX)) {
return;
}
sdb_fis = &s->dev[port].res_fis[RES_FIS_SDBFIS];
ide_state = &s->dev[port].port.ifs[0];
/* clear memory */
*(uint32_t*)sdb_fis = 0;
/* write values */
sdb_fis[0] = ide_state->error;
sdb_fis[2] = ide_state->status & 0x77;
s->dev[port].finished |= finished;
*(uint32_t*)(sdb_fis + 4) = cpu_to_le32(s->dev[port].finished);
ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_STAT_SDBS);
}
static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
{
AHCIPortRegs *pr = &ad->port_regs;
uint8_t *d2h_fis;
int i;
target_phys_addr_t cmd_len = 0x80;
int cmd_mapped = 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 = cpu_physical_memory_map(tbl_addr, &cmd_len, 0);
cmd_mapped = 1;
}
d2h_fis = &ad->res_fis[RES_FIS_RFIS];
d2h_fis[0] = 0x34;
d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0);
d2h_fis[2] = ad->port.ifs[0].status;
d2h_fis[3] = ad->port.ifs[0].error;
d2h_fis[4] = cmd_fis[4];
d2h_fis[5] = cmd_fis[5];
d2h_fis[6] = cmd_fis[6];
d2h_fis[7] = cmd_fis[7];
d2h_fis[8] = cmd_fis[8];
d2h_fis[9] = cmd_fis[9];
d2h_fis[10] = cmd_fis[10];
d2h_fis[11] = cmd_fis[11];
d2h_fis[12] = cmd_fis[12];
d2h_fis[13] = cmd_fis[13];
for (i = 14; i < 0x20; i++) {
d2h_fis[i] = 0;
}
if (d2h_fis[2] & ERR_STAT) {
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_TFES);
}
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS);
if (cmd_mapped) {
cpu_physical_memory_unmap(cmd_fis, cmd_len, 0, cmd_len);
}
}
static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
{
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;
target_phys_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG));
target_phys_addr_t real_prdt_len = prdt_len;
uint8_t *prdt;
int i;
int r = 0;
if (!sglist_alloc_hint) {
DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts);
return -1;
}
/* map PRDT */
if (!(prdt = cpu_physical_memory_map(prdt_addr, &prdt_len, 0))){
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;
qemu_sglist_init(sglist, sglist_alloc_hint);
for (i = 0; i < sglist_alloc_hint; i++) {
/* flags_size is zero-based */
qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr),
le32_to_cpu(tbl[i].flags_size) + 1);
}
}
out:
cpu_physical_memory_unmap(prdt, prdt_len, 0, 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];
/* 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);
qemu_sglist_destroy(&ncq_tfs->sglist);
ncq_tfs->used = 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 %ld to %ld, drive max %ld\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);
ncq_tfs->tag = tag;
switch(ncq_fis->command) {
case READ_FPDMA_QUEUED:
DPRINTF(port, "NCQ reading %d sectors from LBA %ld, tag %d\n",
ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
ncq_tfs->is_read = 1;
DPRINTF(port, "tag %d aio read %ld\n", ncq_tfs->tag, ncq_tfs->lba);
ncq_tfs->aiocb = dma_bdrv_read(ncq_tfs->drive->port.ifs[0].bs,
&ncq_tfs->sglist, ncq_tfs->lba,
ncq_cb, ncq_tfs);
break;
case WRITE_FPDMA_QUEUED:
DPRINTF(port, "NCQ writing %d sectors to LBA %ld, tag %d\n",
ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag);
ncq_tfs->is_read = 0;
DPRINTF(port, "tag %d aio write %ld\n", ncq_tfs->tag, ncq_tfs->lba);
ncq_tfs->aiocb = dma_bdrv_write(ncq_tfs->drive->port.ifs[0].bs,
&ncq_tfs->sglist, ncq_tfs->lba,
ncq_cb, ncq_tfs);
break;
default:
DPRINTF(port, "error: tried to process non-NCQ command as NCQ\n");
qemu_sglist_destroy(&ncq_tfs->sglist);
break;
}
}
static int handle_cmd(AHCIState *s, int port, int slot)
{
IDEState *ide_state;
uint32_t opts;
uint64_t tbl_addr;
AHCICmdHdr *cmd;
uint8_t *cmd_fis;
target_phys_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;
}
cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot];
if (!s->dev[port].lst) {
DPRINTF(port, "error: lst not given but cmd handled");
return -1;
}
/* remember current slot handle for later */
s->dev[port].cur_cmd = cmd;
opts = le32_to_cpu(cmd->opts);
tbl_addr = le64_to_cpu(cmd->tbl_addr);
cmd_len = 0x80;
cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 1);
if (!cmd_fis) {
DPRINTF(port, "error: guest passed us an invalid cmd fis\n");
return -1;
}
/* The device we are working for */
ide_state = &s->dev[port].port.ifs[0];
if (!ide_state->bs) {
DPRINTF(port, "error: guest accessed unused port");
goto out;
}
debug_print_fis(cmd_fis, 0x90);
//debug_print_fis(cmd_fis, (opts & AHCI_CMD_HDR_CMD_FIS_LEN) * 4);
switch (cmd_fis[0]) {
case SATA_FIS_TYPE_REGISTER_H2D:
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]);
goto out;
break;
}
switch (cmd_fis[1]) {
case SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER:
break;
case 0:
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]);
goto out;
break;
}
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;
}
if (cmd_fis[1] == SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER) {
/* Check for NCQ command */
if ((cmd_fis[2] == READ_FPDMA_QUEUED) ||
(cmd_fis[2] == WRITE_FPDMA_QUEUED)) {
process_ncq_command(s, port, cmd_fis, slot);
goto out;
}
/* Decompose the FIS */
ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]);
ide_state->feature = cmd_fis[3];
if (!ide_state->nsector) {
ide_state->nsector = 256;
}
if (ide_state->drive_kind != IDE_CD) {
/*
* We set the sector depending on the sector defined in the FIS.
* Unfortunately, the spec isn't exactly obvious on this one.
*
* Apparently LBA48 commands set fis bytes 10,9,8,6,5,4 to the
* 48 bit sector number. ATA_CMD_READ_DMA_EXT is an example for
* such a command.
*
* Non-LBA48 commands however use 7[lower 4 bits],6,5,4 to define a
* 28-bit sector number. ATA_CMD_READ_DMA is an example for such
* a command.
*
* Since the spec doesn't explicitly state what each field should
* do, I simply assume non-used fields as reserved and OR everything
* together, independent of the command.
*/
ide_set_sector(ide_state, ((uint64_t)cmd_fis[10] << 40)
| ((uint64_t)cmd_fis[9] << 32)
/* This is used for LBA48 commands */
| ((uint64_t)cmd_fis[8] << 24)
/* This is used for non-LBA48 commands */
| ((uint64_t)(cmd_fis[7] & 0xf) << 24)
| ((uint64_t)cmd_fis[6] << 16)
| ((uint64_t)cmd_fis[5] << 8)
| cmd_fis[4]);
}
/* 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);
ide_state->lcyl = 0x14;
ide_state->hcyl = 0xeb;
debug_print_fis(ide_state->io_buffer, 0x10);
ide_state->feature = IDE_FEATURE_DMA;
s->dev[port].done_atapi_packet = 0;
/* 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]);
if (s->dev[port].port.ifs[0].status & READY_STAT) {
ahci_write_fis_d2h(&s->dev[port], cmd_fis);
}
}
out:
cpu_physical_memory_unmap(cmd_fis, cmd_len, 1, 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 int 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 = 1;
goto out;
}
if (!ahci_populate_sglist(ad, &s->sg)) {
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 (is_write && has_sglist && (s->data_ptr < s->data_end)) {
read_from_sglist(s->data_ptr, size, &s->sg);
}
if (!is_write && has_sglist && (s->data_ptr < s->data_end)) {
write_to_sglist(s->data_ptr, size, &s->sg);
}
/* update number of transferred bytes */
ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + size);
out:
/* declare that we processed everything */
s->data_ptr = s->data_end;
if (has_sglist) {
qemu_sglist_destroy(&s->sg);
}
s->end_transfer_func(s);
if (!(s->status & DRQ_STAT)) {
/* done with DMA */
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS);
}
return 0;
}
static void ahci_start_dma(IDEDMA *dma, IDEState *s,
BlockDriverCompletionFunc *dma_cb)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
DPRINTF(ad->port_no, "\n");
ad->dma_cb = dma_cb;
ad->dma_status |= BM_STATUS_DMAING;
dma_cb(s, 0);
}
static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
int i;
ahci_populate_sglist(ad, &s->sg);
s->io_buffer_size = 0;
for (i = 0; i < s->sg.nsg; i++) {
s->io_buffer_size += s->sg.sg[i].len;
}
DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size);
return s->io_buffer_size != 0;
}
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)) {
return 0;
}
if (is_write) {
write_to_sglist(p, l, &s->sg);
} else {
read_from_sglist(p, l, &s->sg);
}
/* update number of transferred bytes */
ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + l);
s->io_buffer_index += l;
DPRINTF(ad->port_no, "len=%#x\n", l);
return 1;
}
static int ahci_dma_set_unit(IDEDMA *dma, int unit)
{
/* only a single unit per link */
return 0;
}
static int ahci_dma_add_status(IDEDMA *dma, int status)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
ad->dma_status |= status;
DPRINTF(ad->port_no, "set status: %x\n", status);
if (status & BM_STATUS_INT) {
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS);
}
return 0;
}
static int ahci_dma_set_inactive(IDEDMA *dma)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
DPRINTF(ad->port_no, "dma done\n");
/* update d2h status */
ahci_write_fis_d2h(ad, NULL);
ad->dma_cb = 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);
}
return 0;
}
static void ahci_irq_set(void *opaque, int n, int level)
{
}
static void ahci_dma_restart_cb(void *opaque, int running, int reason)
{
}
static int ahci_dma_reset(IDEDMA *dma)
{
return 0;
}
static const IDEDMAOps ahci_dma_ops = {
.start_dma = ahci_start_dma,
.start_transfer = ahci_start_transfer,
.prepare_buf = ahci_dma_prepare_buf,
.rw_buf = ahci_dma_rw_buf,
.set_unit = ahci_dma_set_unit,
.add_status = ahci_dma_add_status,
.set_inactive = ahci_dma_set_inactive,
.restart_cb = ahci_dma_restart_cb,
.reset = ahci_dma_reset,
};
void ahci_init(AHCIState *s, DeviceState *qdev, int ports)
{
qemu_irq *irqs;
int i;
s->ports = ports;
s->dev = qemu_mallocz(sizeof(AHCIDevice) * ports);
ahci_reg_init(s);
s->mem = cpu_register_io_memory(ahci_readfn, ahci_writefn, s,
DEVICE_LITTLE_ENDIAN);
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, qdev, i);
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;
ad->port_regs.cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON;
}
}
void ahci_uninit(AHCIState *s)
{
qemu_free(s->dev);
}
void ahci_reset(void *opaque)
{
struct AHCIPCIState *d = opaque;
int i;
d->ahci.control_regs.irqstatus = 0;
d->ahci.control_regs.ghc = 0;
for (i = 0; i < d->ahci.ports; i++) {
ahci_reset_port(&d->ahci, i);
}
}
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