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freebsd-skq/sys/dev/ata/chipsets/ata-ahci.c
Alexander Motin d498a2e62b Fix kernel panic, when ataahci driver is used on system with increased 
MAXPHYS. Current ataahci driver memory allocation scheme includes only
64 items in DMA S/G table, and so not guarantied to support transactions
with more then 252K data.

Approved by:    re (kensmith)
MFC after:      2 weeks
2009-07-08 06:00:21 +00:00

934 lines
29 KiB
C
Raw Blame History

/*-
* Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ata.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/stdarg.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-pci.h>
#include <ata_if.h>
/* local prototypes */
static int ata_ahci_suspend(device_t dev);
static int ata_ahci_status(device_t dev);
static int ata_ahci_begin_transaction(struct ata_request *request);
static int ata_ahci_end_transaction(struct ata_request *request);
static int ata_ahci_pm_read(device_t dev, int port, int reg, u_int32_t *result);
static int ata_ahci_pm_write(device_t dev, int port, int reg, u_int32_t result);
static int ata_ahci_hardreset(device_t dev, int port, uint32_t *signature);
static u_int32_t ata_ahci_softreset(device_t dev, int port);
static void ata_ahci_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
static int ata_ahci_setup_fis(struct ata_ahci_cmd_tab *ctp, struct ata_request *equest);
static void ata_ahci_dmainit(device_t dev);
static void ata_ahci_start(device_t dev);
static void ata_ahci_stop(device_t dev);
static void ata_ahci_clo(device_t dev);
static void ata_ahci_start_fr(device_t dev);
static void ata_ahci_stop_fr(device_t dev);
/*
* AHCI v1.x compliant SATA chipset support functions
*/
static int
ata_ahci_probe(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
char buffer[64];
/* is this a possible AHCI candidate ? */
if (pci_get_class(dev) != PCIC_STORAGE ||
pci_get_subclass(dev) != PCIS_STORAGE_SATA)
return (ENXIO);
/* is this PCI device flagged as an AHCI compliant chip ? */
if (pci_get_progif(dev) != PCIP_STORAGE_SATA_AHCI_1_0)
return (ENXIO);
if (bootverbose)
sprintf(buffer, "%s (ID=%08x) AHCI controller",
ata_pcivendor2str(dev), pci_get_devid(dev));
else
sprintf(buffer, "%s AHCI controller", ata_pcivendor2str(dev));
device_set_desc_copy(dev, buffer);
ctlr->chipinit = ata_ahci_chipinit;
return (BUS_PROBE_GENERIC);
}
int
ata_ahci_chipinit(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
int error, speed;
u_int32_t caps, version;
/* if we have a memory BAR(5) we are likely on an AHCI part */
ctlr->r_type2 = SYS_RES_MEMORY;
ctlr->r_rid2 = PCIR_BAR(5);
if (!(ctlr->r_res2 = bus_alloc_resource_any(dev, ctlr->r_type2,
&ctlr->r_rid2, RF_ACTIVE)))
return ENXIO;
/* setup interrupt delivery if not done allready by a vendor driver */
if (!ctlr->r_irq) {
if (ata_setup_interrupt(dev, ata_generic_intr)) {
bus_release_resource(dev, ctlr->r_type2, ctlr->r_rid2, ctlr->r_res2);
return ENXIO;
}
}
else
device_printf(dev, "AHCI called from vendor specific driver\n");
/* reset controller */
if ((error = ata_ahci_ctlr_reset(dev)) != 0) {
bus_release_resource(dev, ctlr->r_type2, ctlr->r_rid2, ctlr->r_res2);
return (error);
};
/* get the number of HW channels */
ctlr->ichannels = ATA_INL(ctlr->r_res2, ATA_AHCI_PI);
ctlr->channels =
MAX(flsl(ctlr->ichannels),
(ATA_INL(ctlr->r_res2, ATA_AHCI_CAP) & ATA_AHCI_CAP_NPMASK) + 1);
ctlr->reset = ata_ahci_reset;
ctlr->ch_attach = ata_ahci_ch_attach;
ctlr->ch_detach = ata_ahci_ch_detach;
ctlr->ch_suspend = ata_ahci_ch_suspend;
ctlr->ch_resume = ata_ahci_ch_resume;
ctlr->setmode = ata_sata_setmode;
ctlr->suspend = ata_ahci_suspend;
ctlr->resume = ata_ahci_ctlr_reset;
/* announce we support the HW */
version = ATA_INL(ctlr->r_res2, ATA_AHCI_VS);
caps = ATA_INL(ctlr->r_res2, ATA_AHCI_CAP);
speed = (caps & ATA_AHCI_CAP_ISS) >> ATA_AHCI_CAP_ISS_SHIFT;
device_printf(dev,
"AHCI v%x.%02x controller with %d %sGbps ports, PM %s\n",
((version >> 20) & 0xf0) + ((version >> 16) & 0x0f),
((version >> 4) & 0xf0) + (version & 0x0f),
(caps & ATA_AHCI_CAP_NPMASK) + 1,
((speed == 1) ? "1.5":((speed == 2) ? "3":
((speed == 3) ? "6":"?"))),
(caps & ATA_AHCI_CAP_SPM) ?
"supported" : "not supported");
if (bootverbose) {
device_printf(dev, "Caps:%s%s%s%s%s%s%s%s %sGbps",
(caps & ATA_AHCI_CAP_64BIT) ? " 64bit":"",
(caps & ATA_AHCI_CAP_SNCQ) ? " NCQ":"",
(caps & ATA_AHCI_CAP_SSNTF) ? " SNTF":"",
(caps & ATA_AHCI_CAP_SMPS) ? " MPS":"",
(caps & ATA_AHCI_CAP_SSS) ? " SS":"",
(caps & ATA_AHCI_CAP_SALP) ? " ALP":"",
(caps & ATA_AHCI_CAP_SAL) ? " AL":"",
(caps & ATA_AHCI_CAP_SCLO) ? " CLO":"",
((speed == 1) ? "1.5":((speed == 2) ? "3":
((speed == 3) ? "6":"?"))));
printf("%s%s%s%s%s%s %dcmd%s%s%s %dports\n",
(caps & ATA_AHCI_CAP_SAM) ? " AM":"",
(caps & ATA_AHCI_CAP_SPM) ? " PM":"",
(caps & ATA_AHCI_CAP_FBSS) ? " FBS":"",
(caps & ATA_AHCI_CAP_PMD) ? " PMD":"",
(caps & ATA_AHCI_CAP_SSC) ? " SSC":"",
(caps & ATA_AHCI_CAP_PSC) ? " PSC":"",
((caps & ATA_AHCI_CAP_NCS) >> ATA_AHCI_CAP_NCS_SHIFT) + 1,
(caps & ATA_AHCI_CAP_CCCS) ? " CCC":"",
(caps & ATA_AHCI_CAP_EMS) ? " EM":"",
(caps & ATA_AHCI_CAP_SXS) ? " eSATA":"",
(caps & ATA_AHCI_CAP_NPMASK) + 1);
}
return 0;
}
int
ata_ahci_ctlr_reset(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
int timeout;
/* enable AHCI mode */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_GHC, ATA_AHCI_GHC_AE);
/* reset AHCI controller */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_GHC, ATA_AHCI_GHC_AE|ATA_AHCI_GHC_HR);
for (timeout = 1000; timeout > 0; timeout--) {
DELAY(1000);
if ((ATA_INL(ctlr->r_res2, ATA_AHCI_GHC) & ATA_AHCI_GHC_HR) == 0)
break;
}
if (timeout == 0) {
device_printf(dev, "AHCI controller reset failure\n");
return ENXIO;
}
/* reenable AHCI mode */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_GHC, ATA_AHCI_GHC_AE);
/* clear interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_IS, ATA_INL(ctlr->r_res2, ATA_AHCI_IS));
/* enable AHCI interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_GHC,
ATA_INL(ctlr->r_res2, ATA_AHCI_GHC) | ATA_AHCI_GHC_IE);
return 0;
}
static int
ata_ahci_suspend(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(dev);
/* disable interupts so the state change(s) doesn't trigger */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_GHC,
ATA_INL(ctlr->r_res2, ATA_AHCI_GHC) & (~ATA_AHCI_GHC_IE));
return 0;
}
int
ata_ahci_ch_attach(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
int offset = ch->unit << 7;
ata_ahci_dmainit(dev);
/* set the SATA resources */
ch->r_io[ATA_SSTATUS].res = ctlr->r_res2;
ch->r_io[ATA_SSTATUS].offset = ATA_AHCI_P_SSTS + offset;
ch->r_io[ATA_SERROR].res = ctlr->r_res2;
ch->r_io[ATA_SERROR].offset = ATA_AHCI_P_SERR + offset;
ch->r_io[ATA_SCONTROL].res = ctlr->r_res2;
ch->r_io[ATA_SCONTROL].offset = ATA_AHCI_P_SCTL + offset;
ch->r_io[ATA_SACTIVE].res = ctlr->r_res2;
ch->r_io[ATA_SACTIVE].offset = ATA_AHCI_P_SACT + offset;
ch->hw.status = ata_ahci_status;
ch->hw.begin_transaction = ata_ahci_begin_transaction;
ch->hw.end_transaction = ata_ahci_end_transaction;
ch->hw.command = NULL; /* not used here */
ch->hw.softreset = ata_ahci_softreset;
ch->hw.pm_read = ata_ahci_pm_read;
ch->hw.pm_write = ata_ahci_pm_write;
ata_ahci_ch_resume(dev);
return 0;
}
int
ata_ahci_ch_detach(device_t dev)
{
ata_ahci_ch_suspend(dev);
ata_dmafini(dev);
return (0);
}
int
ata_ahci_ch_suspend(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
int offset = ch->unit << 7;
/* Disable port interrupts. */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset, 0);
/* Reset command register. */
ata_ahci_stop(dev);
ata_ahci_stop_fr(dev);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset, 0);
/* Allow everything including partial and slumber modes. */
ATA_IDX_OUTL(ch, ATA_SCONTROL, 0);
/* Request slumber mode transition and give some time to get there. */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset, ATA_AHCI_P_CMD_SLUMBER);
DELAY(100);
/* Disable PHY. */
ATA_IDX_OUTL(ch, ATA_SCONTROL, ATA_SC_DET_DISABLE);
return (0);
}
int
ata_ahci_ch_resume(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
uint64_t work;
int offset = ch->unit << 7;
/* Disable port interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset, 0);
/* setup work areas */
work = ch->dma.work_bus + ATA_AHCI_CL_OFFSET;
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CLB + offset, work & 0xffffffff);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CLBU + offset, work >> 32);
work = ch->dma.work_bus + ATA_AHCI_FB_OFFSET;
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_FB + offset, work & 0xffffffff);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_FBU + offset, work >> 32);
/* activate the channel and power/spin up device */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
(ATA_AHCI_P_CMD_ACTIVE | ATA_AHCI_P_CMD_POD | ATA_AHCI_P_CMD_SUD |
((ch->pm_level > 1) ? ATA_AHCI_P_CMD_ALPE : 0) |
((ch->pm_level > 2) ? ATA_AHCI_P_CMD_ASP : 0 )));
ata_ahci_start_fr(dev);
ata_ahci_start(dev);
return (0);
}
static int
ata_ahci_status(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t action = ATA_INL(ctlr->r_res2, ATA_AHCI_IS);
int offset = ch->unit << 7;
#define ATA_AHCI_STATBITS \
(ATA_AHCI_P_IX_IF|ATA_AHCI_P_IX_HBD|ATA_AHCI_P_IX_HBF|ATA_AHCI_P_IX_TFE)
if (action & (1 << ch->unit)) {
u_int32_t istatus = ATA_INL(ctlr->r_res2, ATA_AHCI_P_IS + offset);
u_int32_t cstatus = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CI + offset);
/* clear interrupt(s) */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IS + offset, istatus);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_IS, 1 << ch->unit);
/* do we have any PHY events ? */
if (istatus & (ATA_AHCI_P_IX_PRC | ATA_AHCI_P_IX_PC))
ata_sata_phy_check_events(dev);
/* do we have a potentially hanging engine to take care of? */
/* XXX SOS what todo on NCQ */
if ((istatus & ATA_AHCI_STATBITS) && (cstatus & 1)) {
u_int32_t cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
int timeout = 0;
/* kill off all activity on this channel */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
cmd & ~(ATA_AHCI_P_CMD_FRE | ATA_AHCI_P_CMD_ST));
/* XXX SOS this is not entirely wrong */
do {
DELAY(1000);
if (timeout++ > 1000) {
device_printf(dev, "stopping AHCI engine failed\n");
break;
}
} while (ATA_INL(ctlr->r_res2,
ATA_AHCI_P_CMD + offset) & ATA_AHCI_P_CMD_CR);
/* start operations on this channel */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
cmd | (ATA_AHCI_P_CMD_FRE | ATA_AHCI_P_CMD_ST));
return 1;
}
else
/* XXX SOS what todo on NCQ */
return (!(cstatus & 1));
}
return 0;
}
/* must be called with ATA channel locked and state_mtx held */
static int
ata_ahci_begin_transaction(struct ata_request *request)
{
struct ata_pci_controller *ctlr=device_get_softc(GRANDPARENT(request->dev));
struct ata_channel *ch = device_get_softc(request->parent);
struct ata_device *atadev = device_get_softc(request->dev);
struct ata_ahci_cmd_tab *ctp;
struct ata_ahci_cmd_list *clp;
int offset = ch->unit << 7;
int port = atadev->unit & 0x0f;
int entries = 0;
int fis_size;
/* get a piece of the workspace for this request */
ctp = (struct ata_ahci_cmd_tab *)
(ch->dma.work + ATA_AHCI_CT_OFFSET + (ATA_AHCI_CT_SIZE*request->tag));
/* setup the FIS for this request */
if (!(fis_size = ata_ahci_setup_fis(ctp, request))) {
device_printf(request->dev, "setting up SATA FIS failed\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* if request moves data setup and load SG list */
if (request->flags & (ATA_R_READ | ATA_R_WRITE)) {
if (ch->dma.load(request, ctp->prd_tab, &entries)) {
device_printf(request->dev, "setting up DMA failed\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
}
/* setup the command list entry */
clp = (struct ata_ahci_cmd_list *)
(ch->dma.work + ATA_AHCI_CL_OFFSET + (ATA_AHCI_CL_SIZE*request->tag));
clp->prd_length = entries;
clp->cmd_flags = (request->flags & ATA_R_WRITE ? ATA_AHCI_CMD_WRITE : 0) |
(request->flags & ATA_R_ATAPI ?
(ATA_AHCI_CMD_ATAPI | ATA_AHCI_CMD_PREFETCH) : 0) |
(fis_size / sizeof(u_int32_t)) |
(port << 12);
clp->bytecount = 0;
clp->cmd_table_phys = htole64(ch->dma.work_bus + ATA_AHCI_CT_OFFSET +
(ATA_AHCI_CT_SIZE * request->tag));
/* clear eventual ACTIVE bit */
ATA_IDX_OUTL(ch, ATA_SACTIVE,
ATA_IDX_INL(ch, ATA_SACTIVE) & (1 << request->tag));
/* set command type bit */
if (request->flags & ATA_R_ATAPI)
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset) |
ATA_AHCI_P_CMD_ATAPI);
else
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset) &
~ATA_AHCI_P_CMD_ATAPI);
/* issue command to controller */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CI + offset, (1 << request->tag));
if (!(request->flags & ATA_R_ATAPI)) {
/* device reset doesn't interrupt */
if (request->u.ata.command == ATA_DEVICE_RESET) {
u_int32_t tf_data;
int timeout = 1000000;
do {
DELAY(10);
tf_data = ATA_INL(ctlr->r_res2, ATA_AHCI_P_TFD + (ch->unit<<7));
} while ((tf_data & ATA_S_BUSY) && timeout--);
if (bootverbose)
device_printf(ch->dev, "device_reset timeout=%dus\n",
(1000000-timeout)*10);
request->status = tf_data;
if (request->status & ATA_S_ERROR)
request->error = tf_data >> 8;
return ATA_OP_FINISHED;
}
}
/* start the timeout */
callout_reset(&request->callout, request->timeout * hz,
(timeout_t*)ata_timeout, request);
return ATA_OP_CONTINUES;
}
/* must be called with ATA channel locked and state_mtx held */
static int
ata_ahci_end_transaction(struct ata_request *request)
{
struct ata_pci_controller *ctlr=device_get_softc(GRANDPARENT(request->dev));
struct ata_channel *ch = device_get_softc(request->parent);
struct ata_ahci_cmd_list *clp;
u_int32_t tf_data;
int offset = ch->unit << 7;
/* kill the timeout */
callout_stop(&request->callout);
/* get status */
tf_data = ATA_INL(ctlr->r_res2, ATA_AHCI_P_TFD + offset);
request->status = tf_data;
/* if error status get details */
if (request->status & ATA_S_ERROR)
request->error = tf_data >> 8;
/* on control commands read back registers to the request struct */
if (request->flags & ATA_R_CONTROL) {
struct ata_device *atadev = device_get_softc(request->dev);
u_int8_t *fis = ch->dma.work + ATA_AHCI_FB_OFFSET + 0x40;
request->u.ata.count = fis[12] | ((u_int16_t)fis[13] << 8);
request->u.ata.lba = fis[4] | ((u_int64_t)fis[5] << 8) |
((u_int64_t)fis[6] << 16);
if (atadev->flags & ATA_D_48BIT_ACTIVE)
request->u.ata.lba |= ((u_int64_t)fis[8] << 24) |
((u_int64_t)fis[9] << 32) |
((u_int64_t)fis[10] << 40);
else
request->u.ata.lba |= ((u_int64_t)(fis[7] & 0x0f) << 24);
}
/* record how much data we actually moved */
clp = (struct ata_ahci_cmd_list *)
(ch->dma.work + ATA_AHCI_CL_OFFSET + (ATA_AHCI_CL_SIZE*request->tag));
request->donecount = clp->bytecount;
/* release SG list etc */
ch->dma.unload(request);
return ATA_OP_FINISHED;
}
static int
ata_ahci_issue_cmd(device_t dev, u_int16_t flags, int timeout)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
struct ata_ahci_cmd_list *clp =
(struct ata_ahci_cmd_list *)(ch->dma.work + ATA_AHCI_CL_OFFSET);
struct ata_ahci_cmd_tab *ctp =
(struct ata_ahci_cmd_tab *)(ch->dma.work + ATA_AHCI_CT_OFFSET);
u_int32_t status = 0;
int offset = ch->unit << 7;
int port = (ctp->cfis[1] & 0x0f);
int count;
clp->prd_length = 0;
clp->cmd_flags = (20 / sizeof(u_int32_t)) | flags | (port << 12);
clp->bytecount = 0;
clp->cmd_table_phys = htole64(ch->dma.work_bus + ATA_AHCI_CT_OFFSET);
/* issue command to controller */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CI + offset, 1);
/* poll for command finished */
for (count = 0; count < timeout; count++) {
DELAY(1000);
if (!((status = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CI + offset)) & 1))
break;
}
/* clear interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IS + offset,
ATA_INL(ctlr->r_res2, ATA_AHCI_P_IS + offset));
if (timeout && (count >= timeout)) {
if (bootverbose) {
device_printf(dev, "ahci_issue_cmd timeout: %d of %dms, status=%08x\n",
count, timeout, status);
}
return EIO;
}
return 0;
}
static int
ata_ahci_pm_read(device_t dev, int port, int reg, u_int32_t *result)
{
struct ata_channel *ch = device_get_softc(dev);
struct ata_ahci_cmd_tab *ctp =
(struct ata_ahci_cmd_tab *)(ch->dma.work + ATA_AHCI_CT_OFFSET);
u_int8_t *fis = ch->dma.work + ATA_AHCI_FB_OFFSET + 0x40;
bzero(ctp->cfis, 64);
ctp->cfis[0] = 0x27; /* host to device */
ctp->cfis[1] = 0x8f; /* command FIS to PM port */
ctp->cfis[2] = ATA_READ_PM;
ctp->cfis[3] = reg;
ctp->cfis[7] = port | ATA_D_LBA;
ctp->cfis[15] = ATA_A_4BIT;
if (ata_ahci_issue_cmd(dev, 0, 10)) {
device_printf(dev, "error reading PM port\n");
return EIO;
}
*result = fis[12] | (fis[4] << 8) | (fis[5] << 16) | (fis[6] << 24);
return 0;
}
static int
ata_ahci_pm_write(device_t dev, int port, int reg, u_int32_t value)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
struct ata_ahci_cmd_tab *ctp =
(struct ata_ahci_cmd_tab *)(ch->dma.work + ATA_AHCI_CT_OFFSET);
int offset = ch->unit << 7;
bzero(ctp->cfis, 64);
ctp->cfis[0] = 0x27; /* host to device */
ctp->cfis[1] = 0x8f; /* command FIS to PM port */
ctp->cfis[2] = ATA_WRITE_PM;
ctp->cfis[3] = reg;
ctp->cfis[7] = port | ATA_D_LBA;
ctp->cfis[12] = value & 0xff;
ctp->cfis[4] = (value >> 8) & 0xff;;
ctp->cfis[5] = (value >> 16) & 0xff;;
ctp->cfis[6] = (value >> 24) & 0xff;;
ctp->cfis[15] = ATA_A_4BIT;
if (ata_ahci_issue_cmd(dev, 0, 100)) {
device_printf(dev, "error writing PM port\n");
return ATA_E_ABORT;
}
return (ATA_INL(ctlr->r_res2, ATA_AHCI_P_TFD + offset) >> 8) & 0xff;
}
static void
ata_ahci_stop(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t cmd;
int offset = ch->unit << 7;
int timeout;
/* kill off all activity on this channel */
cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
cmd & ~ATA_AHCI_P_CMD_ST);
/* XXX SOS this is not entirely wrong */
timeout = 0;
do {
DELAY(1000);
if (timeout++ > 1000) {
device_printf(dev, "stopping AHCI engine failed\n");
break;
}
}
while (ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset) & ATA_AHCI_P_CMD_CR);
}
static void
ata_ahci_clo(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t cmd;
int offset = ch->unit << 7;
int timeout;
/* issue Command List Override if supported */
if (ATA_INL(ctlr->r_res2, ATA_AHCI_CAP) & ATA_AHCI_CAP_SCLO) {
cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
cmd |= ATA_AHCI_P_CMD_CLO;
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset, cmd);
timeout = 0;
do {
DELAY(1000);
if (timeout++ > 1000) {
device_printf(dev, "executing CLO failed\n");
break;
}
}
while (ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD+offset)&ATA_AHCI_P_CMD_CLO);
}
}
static void
ata_ahci_start(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t cmd;
int offset = ch->unit << 7;
/* clear SATA error register */
ATA_IDX_OUTL(ch, ATA_SERROR, ATA_IDX_INL(ch, ATA_SERROR));
/* clear any interrupts pending on this channel */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IS + offset,
ATA_INL(ctlr->r_res2, ATA_AHCI_P_IS + offset));
/* start operations on this channel */
cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset,
cmd | ATA_AHCI_P_CMD_ST |
(ch->devices & ATA_PORTMULTIPLIER ? ATA_AHCI_P_CMD_PMA : 0));
}
static void
ata_ahci_stop_fr(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t cmd;
int offset = ch->unit << 7;
int timeout;
/* kill off all activity on this channel */
cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset, cmd & ~ATA_AHCI_P_CMD_FRE);
timeout = 0;
do {
DELAY(1000);
if (timeout++ > 1000) {
device_printf(dev, "stopping AHCI FR engine failed\n");
break;
}
}
while (ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset) & ATA_AHCI_P_CMD_FR);
}
static void
ata_ahci_start_fr(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t cmd;
int offset = ch->unit << 7;
/* start FIS reception on this channel */
cmd = ATA_INL(ctlr->r_res2, ATA_AHCI_P_CMD + offset);
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_CMD + offset, cmd | ATA_AHCI_P_CMD_FRE);
}
static int
ata_ahci_wait_ready(device_t dev, int t)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
int offset = ch->unit << 7;
int timeout = 0;
uint32_t val;
while ((val = ATA_INL(ctlr->r_res2, ATA_AHCI_P_TFD + offset)) &
(ATA_S_BUSY | ATA_S_DRQ)) {
DELAY(1000);
if (timeout++ > t) {
device_printf(dev, "port is not ready (timeout %dms) tfd = %08x\n", t, val);
return (EBUSY);
}
}
if (bootverbose)
device_printf(dev, "ready wait time=%dms\n", timeout);
return (0);
}
static int
ata_ahci_hardreset(device_t dev, int port, uint32_t *signature)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
int offset = ch->unit << 7;
*signature = 0xffffffff;
ata_ahci_stop(dev);
/* Reset port */
if (!ata_sata_phy_reset(dev, port, 0))
return (ENOENT);
/* Wait for clearing busy status. */
if (ata_ahci_wait_ready(dev, 10000)) {
device_printf(dev, "hardware reset timeout\n");
return (EBUSY);
}
*signature = ATA_INL(ctlr->r_res2, ATA_AHCI_P_SIG + offset);
ata_ahci_start(dev);
return (0);
}
static u_int32_t
ata_ahci_softreset(device_t dev, int port)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
int offset = ch->unit << 7;
struct ata_ahci_cmd_tab *ctp =
(struct ata_ahci_cmd_tab *)(ch->dma.work + ATA_AHCI_CT_OFFSET);
if (bootverbose)
device_printf(dev, "software reset port %d...\n", port);
/* kick controller into sane state */
ata_ahci_stop(dev);
ata_ahci_clo(dev);
ata_ahci_start(dev);
/* pull reset active */
bzero(ctp->cfis, 64);
ctp->cfis[0] = 0x27;
ctp->cfis[1] = port & 0x0f;
//ctp->cfis[7] = ATA_D_LBA | ATA_D_IBM;
ctp->cfis[15] = (ATA_A_4BIT | ATA_A_RESET);
if (ata_ahci_issue_cmd(dev, ATA_AHCI_CMD_RESET | ATA_AHCI_CMD_CLR_BUSY,100)) {
device_printf(dev, "software reset set timeout\n");
return (-1);
}
ata_udelay(50);
/* pull reset inactive -> device softreset */
bzero(ctp->cfis, 64);
ctp->cfis[0] = 0x27;
ctp->cfis[1] = port & 0x0f;
//ctp->cfis[7] = ATA_D_LBA | ATA_D_IBM;
ctp->cfis[15] = ATA_A_4BIT;
ata_ahci_issue_cmd(dev, 0, 3000);
if (ata_ahci_wait_ready(dev, 0)) {
device_printf(dev, "software reset clear timeout\n");
return (-1);
}
return ATA_INL(ctlr->r_res2, ATA_AHCI_P_SIG + offset);
}
void
ata_ahci_reset(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
u_int32_t signature;
int offset = ch->unit << 7;
if (bootverbose)
device_printf(dev, "AHCI reset...\n");
/* Disable port interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset, 0);
if (ata_ahci_hardreset(dev, -1, &signature)) {
if (bootverbose)
device_printf(dev, "AHCI reset done: phy reset found no device\n");
ch->devices = 0;
/* enable wanted port interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset,
(ATA_AHCI_P_IX_CPD | ATA_AHCI_P_IX_PRC | ATA_AHCI_P_IX_PC));
return;
}
/* enable wanted port interrupts */
ATA_OUTL(ctlr->r_res2, ATA_AHCI_P_IE + offset,
(ATA_AHCI_P_IX_CPD | ATA_AHCI_P_IX_TFE | ATA_AHCI_P_IX_HBF |
ATA_AHCI_P_IX_HBD | ATA_AHCI_P_IX_IF | ATA_AHCI_P_IX_OF |
((ch->pm_level == 0) ? ATA_AHCI_P_IX_PRC | ATA_AHCI_P_IX_PC : 0) |
ATA_AHCI_P_IX_DP | ATA_AHCI_P_IX_UF | ATA_AHCI_P_IX_SDB |
ATA_AHCI_P_IX_DS | ATA_AHCI_P_IX_PS | ATA_AHCI_P_IX_DHR));
/* only probe for PortMultiplier if HW has support */
if (ATA_INL(ctlr->r_res2, ATA_AHCI_CAP) & ATA_AHCI_CAP_SPM) {
signature = ata_ahci_softreset(dev, ATA_PM);
/* Workaround for some ATI chips, failing to soft-reset
* when port multiplicator supported, but absent.
* XXX: We can also check PxIS.IPMS==1 here to be sure. */
if (signature == 0xffffffff)
signature = ata_ahci_softreset(dev, 0);
} else {
signature = ata_ahci_softreset(dev, 0);
}
if (bootverbose)
device_printf(dev, "SIGNATURE: %08x\n", signature);
switch (signature >> 16) {
case 0x0000:
ch->devices = ATA_ATA_MASTER;
break;
case 0x9669:
ch->devices = ATA_PORTMULTIPLIER;
ata_pm_identify(dev);
break;
case 0xeb14:
ch->devices = ATA_ATAPI_MASTER;
break;
default: /* SOS XXX */
if (bootverbose)
device_printf(dev, "Unknown signature, assuming disk device\n");
ch->devices = ATA_ATA_MASTER;
}
if (bootverbose)
device_printf(dev, "AHCI reset done: devices=%08x\n", ch->devices);
}
static void
ata_ahci_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
{
struct ata_dmasetprd_args *args = xsc;
struct ata_ahci_dma_prd *prd = args->dmatab;
int i;
if (!(args->error = error)) {
for (i = 0; i < nsegs; i++) {
prd[i].dba = htole64(segs[i].ds_addr);
prd[i].dbc = htole32((segs[i].ds_len - 1) & ATA_AHCI_PRD_MASK);
}
}
KASSERT(nsegs <= ATA_AHCI_DMA_ENTRIES, ("too many DMA segment entries\n"));
args->nsegs = nsegs;
}
static void
ata_ahci_dmainit(device_t dev)
{
struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
ata_dmainit(dev);
/* note start and stop are not used here */
ch->dma.setprd = ata_ahci_dmasetprd;
ch->dma.max_iosize = (ATA_AHCI_DMA_ENTRIES - 1) * PAGE_SIZE;
if (ATA_INL(ctlr->r_res2, ATA_AHCI_CAP) & ATA_AHCI_CAP_64BIT)
ch->dma.max_address = BUS_SPACE_MAXADDR;
}
static int
ata_ahci_setup_fis(struct ata_ahci_cmd_tab *ctp, struct ata_request *request)
{
bzero(ctp->cfis, 64);
if (request->flags & ATA_R_ATAPI) {
bzero(ctp->acmd, 32);
bcopy(request->u.atapi.ccb, ctp->acmd, 16);
}
return ata_request2fis_h2d(request, &ctp->cfis[0]);
}
ATA_DECLARE_DRIVER(ata_ahci);
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