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| Current File : //usr/src/sys/arm/mv/mv_sata.c |
/*-
* Copyright (C) 2008-2009 Semihalf
* All rights reserved.
*
* Initial version developed by Ilya Bakulin. Full functionality and bringup
* by Piotr Ziecik.
*
* 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.
* 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 AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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: release/9.1.0/sys/arm/mv/mv_sata.c 214016 2010-10-18 11:30:13Z mav $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/resource.h>
#include <sys/systm.h>
#include <sys/rman.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/endian.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/ata.h>
#include <dev/ata/ata-all.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "ata_if.h"
#include "mvreg.h"
#include "mvvar.h"
/* Useful macros */
#define EDMA_TIMEOUT 100000 /* 100 ms */
#define SATA_INL(sc, reg) ATA_INL((sc)->sc_mem_res, reg)
#define SATA_OUTL(sc, reg, val) ATA_OUTL((sc)->sc_mem_res, reg, val)
/* HW-related data structures */
struct sata_prdentry {
uint32_t prd_addrlo;
uint32_t prd_count;
uint32_t prd_addrhi;
uint32_t prd_reserved;
};
struct sata_crqb {
uint32_t crqb_prdlo;
uint32_t crqb_prdhi;
uint32_t crqb_flags;
uint16_t crqb_count;
uint16_t crqb_reserved1[2];
uint8_t crqb_ata_command;
uint8_t crqb_ata_feature;
uint8_t crqb_ata_lba_low;
uint8_t crqb_ata_lba_mid;
uint8_t crqb_ata_lba_high;
uint8_t crqb_ata_device;
uint8_t crqb_ata_lba_low_p;
uint8_t crqb_ata_lba_mid_p;
uint8_t crqb_ata_lba_high_p;
uint8_t crqb_ata_feature_p;
uint8_t crqb_ata_count;
uint8_t crqb_ata_count_p;
uint16_t crqb_reserved2;
};
struct sata_crpb {
uint8_t crpb_tag;
uint8_t crpb_reserved;
uint8_t crpb_edma_status;
uint8_t crpb_dev_status;
uint32_t crpb_timestamp;
};
/* Identification section. */
struct sata_softc {
device_t sc_dev;
unsigned int sc_version;
unsigned int sc_edma_qlen;
uint32_t sc_edma_reqis_mask;
uint32_t sc_edma_resos_mask;
struct resource *sc_mem_res;
bus_space_tag_t sc_mem_res_bustag;
bus_space_handle_t sc_mem_res_bushdl;
struct resource *sc_irq_res;
void *sc_irq_cookiep;
struct {
void (*function)(void *);
void *argument;
} sc_interrupt[SATA_CHAN_NUM];
};
/* Controller functions */
static int sata_probe(device_t dev);
static int sata_attach(device_t dev);
static int sata_detach(device_t dev);
static void sata_intr(void*);
static struct resource * sata_alloc_resource(device_t dev, device_t child,
int type, int *rid, u_long start, u_long end, u_long count, u_int flags);
static int sata_release_resource(device_t dev, device_t child, int type,
int rid, struct resource *r);
static int sata_setup_intr(device_t dev, device_t child,
struct resource *irq, int flags, driver_filter_t *filt,
driver_intr_t *function, void *argument, void **cookiep);
static int sata_teardown_intr(device_t dev, device_t child,
struct resource *irq, void *cookie);
/* Channel functions */
static int sata_channel_probe(device_t dev);
static int sata_channel_attach(device_t dev);
static int sata_channel_detach(device_t dev);
static int sata_channel_begin_transaction(struct ata_request *request);
static int sata_channel_end_transaction(struct ata_request *request);
static int sata_channel_status(device_t dev);
static int sata_channel_setmode(device_t dev, int target, int mode);
static int sata_channel_getrev(device_t dev, int target);
static void sata_channel_reset(device_t dev);
static void sata_channel_dmasetprd(void *xsc, bus_dma_segment_t *segs,
int nsegs, int error);
/* EDMA functions */
static int sata_edma_ctrl(device_t dev, int on);
static int sata_edma_is_running(device_t);
static device_method_t sata_methods[] = {
/* Device method */
DEVMETHOD(device_probe, sata_probe),
DEVMETHOD(device_attach, sata_attach),
DEVMETHOD(device_detach, sata_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* ATA bus methods. */
DEVMETHOD(bus_alloc_resource, sata_alloc_resource),
DEVMETHOD(bus_release_resource, sata_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, sata_setup_intr),
DEVMETHOD(bus_teardown_intr, sata_teardown_intr),
{ 0, 0 },
};
static driver_t sata_driver = {
"sata",
sata_methods,
sizeof(struct sata_softc),
};
devclass_t sata_devclass;
DRIVER_MODULE(sata, simplebus, sata_driver, sata_devclass, 0, 0);
MODULE_VERSION(sata, 1);
MODULE_DEPEND(sata, ata, 1, 1, 1);
static int
sata_probe(device_t dev)
{
struct sata_softc *sc;
uint32_t d, r;
if (!ofw_bus_is_compatible(dev, "mrvl,sata"))
return (ENXIO);
soc_id(&d, &r);
sc = device_get_softc(dev);
switch(d) {
case MV_DEV_88F5182:
sc->sc_version = 1;
sc->sc_edma_qlen = 128;
break;
case MV_DEV_88F6281:
case MV_DEV_MV78100:
case MV_DEV_MV78100_Z0:
sc->sc_version = 2;
sc->sc_edma_qlen = 32;
break;
default:
device_printf(dev, "unsupported SoC (ID: 0x%08X)!\n", d);
return (ENXIO);
}
sc->sc_edma_reqis_mask = (sc->sc_edma_qlen - 1) << SATA_EDMA_REQIS_OFS;
sc->sc_edma_resos_mask = (sc->sc_edma_qlen - 1) << SATA_EDMA_RESOS_OFS;
device_set_desc(dev, "Marvell Integrated SATA Controller");
return (0);
}
static int
sata_attach(device_t dev)
{
struct sata_softc *sc;
int mem_id, irq_id, error, i;
device_t ata_chan;
uint32_t reg;
sc = device_get_softc(dev);
sc->sc_dev = dev;
mem_id = 0;
irq_id = 0;
/* Allocate resources */
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&mem_id, RF_ACTIVE);
if (sc->sc_mem_res == NULL) {
device_printf(dev, "could not allocate memory.\n");
return (ENOMEM);
}
sc->sc_mem_res_bustag = rman_get_bustag(sc->sc_mem_res);
sc->sc_mem_res_bushdl = rman_get_bushandle(sc->sc_mem_res);
KASSERT(sc->sc_mem_res_bustag && sc->sc_mem_res_bushdl,
("cannot get bus handle or tag."));
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq_id,
RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(dev, "could not allocate IRQ.\n");
error = ENOMEM;
goto err;
}
error = bus_setup_intr(dev, sc->sc_irq_res,
INTR_TYPE_BIO | INTR_MPSAFE | INTR_ENTROPY,
NULL, sata_intr, sc, &sc->sc_irq_cookiep);
if (error != 0) {
device_printf(dev, "could not setup interrupt.\n");
goto err;
}
/* Attach channels */
for (i = 0; i < SATA_CHAN_NUM; i++) {
ata_chan = device_add_child(dev, "ata",
devclass_find_free_unit(ata_devclass, 0));
if (!ata_chan) {
device_printf(dev, "cannot add channel %d.\n", i);
error = ENOMEM;
goto err;
}
}
/* Disable interrupt coalescing */
reg = SATA_INL(sc, SATA_CR);
for (i = 0; i < SATA_CHAN_NUM; i++)
reg |= SATA_CR_COALDIS(i);
/* Disable DMA byte swapping */
if (sc->sc_version == 2)
reg |= SATA_CR_NODMABS | SATA_CR_NOEDMABS |
SATA_CR_NOPRDPBS;
SATA_OUTL(sc, SATA_CR, reg);
/* Clear and mask all interrupts */
SATA_OUTL(sc, SATA_ICR, 0);
SATA_OUTL(sc, SATA_MIMR, 0);
return(bus_generic_attach(dev));
err:
sata_detach(dev);
return (error);
}
static int
sata_detach(device_t dev)
{
struct sata_softc *sc;
sc = device_get_softc(dev);
if (device_is_attached(dev))
bus_generic_detach(dev);
if (sc->sc_mem_res != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(sc->sc_mem_res), sc->sc_mem_res);
sc->sc_mem_res = NULL;
}
if (sc->sc_irq_res != NULL) {
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_irq_cookiep);
bus_release_resource(dev, SYS_RES_IRQ,
rman_get_rid(sc->sc_irq_res), sc->sc_irq_res);
sc->sc_irq_res = NULL;
}
return (0);
}
static struct resource *
sata_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct sata_softc *sc;
sc = device_get_softc(dev);
KASSERT(type == SYS_RES_IRQ && *rid == ATA_IRQ_RID,
("illegal resource request (type %u, rid %u).",
type, *rid));
return (sc->sc_irq_res);
}
static int
sata_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *r)
{
KASSERT(type == SYS_RES_IRQ && rid == ATA_IRQ_RID,
("strange type %u and/or rid %u while releasing resource.", type,
rid));
return (0);
}
static int
sata_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
driver_filter_t *filt, driver_intr_t *function, void *argument,
void **cookiep)
{
struct sata_softc *sc;
struct ata_channel *ch;
sc = device_get_softc(dev);
ch = device_get_softc(child);
if (filt != NULL) {
device_printf(dev, "filter interrupts are not supported.\n");
return (EINVAL);
}
sc->sc_interrupt[ch->unit].function = function;
sc->sc_interrupt[ch->unit].argument = argument;
*cookiep = sc;
return (0);
}
static int
sata_teardown_intr(device_t dev, device_t child, struct resource *irq,
void *cookie)
{
struct sata_softc *sc;
struct ata_channel *ch;
sc = device_get_softc(dev);
ch = device_get_softc(child);
sc->sc_interrupt[ch->unit].function = NULL;
sc->sc_interrupt[ch->unit].argument = NULL;
return (0);
}
static void
sata_intr(void *xsc)
{
struct sata_softc *sc;
int unit;
sc = xsc;
/*
* Behave like ata_generic_intr() for PCI controllers.
* Simply invoke ISRs on all channels.
*/
for (unit = 0; unit < SATA_CHAN_NUM; unit++)
if (sc->sc_interrupt[unit].function != NULL)
sc->sc_interrupt[unit].function(
sc->sc_interrupt[unit].argument);
}
static int
sata_channel_probe(device_t dev)
{
device_set_desc(dev, "Marvell Integrated SATA Channel");
return (ata_probe(dev));
}
static int
sata_channel_attach(device_t dev)
{
struct sata_softc *sc;
struct ata_channel *ch;
uint64_t work;
int error, i;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
if (ch->attached)
return (0);
ch->dev = dev;
ch->unit = device_get_unit(dev);
ch->flags |= ATA_USE_16BIT | ATA_NO_SLAVE | ATA_SATA;
/* Set legacy ATA resources. */
for (i = ATA_DATA; i <= ATA_COMMAND; i++) {
ch->r_io[i].res = sc->sc_mem_res;
ch->r_io[i].offset = SATA_SHADOWR_BASE(ch->unit) + (i << 2);
}
ch->r_io[ATA_CONTROL].res = sc->sc_mem_res;
ch->r_io[ATA_CONTROL].offset = SATA_SHADOWR_CONTROL(ch->unit);
ch->r_io[ATA_IDX_ADDR].res = sc->sc_mem_res;
ata_default_registers(dev);
/* Set SATA resources. */
ch->r_io[ATA_SSTATUS].res = sc->sc_mem_res;
ch->r_io[ATA_SSTATUS].offset = SATA_SATA_SSTATUS(ch->unit);
ch->r_io[ATA_SERROR].res = sc->sc_mem_res;
ch->r_io[ATA_SERROR].offset = SATA_SATA_SERROR(ch->unit);
ch->r_io[ATA_SCONTROL].res = sc->sc_mem_res;
ch->r_io[ATA_SCONTROL].offset = SATA_SATA_SCONTROL(ch->unit);
ata_generic_hw(dev);
ch->hw.begin_transaction = sata_channel_begin_transaction;
ch->hw.end_transaction = sata_channel_end_transaction;
ch->hw.status = sata_channel_status;
/* Set DMA resources */
ata_dmainit(dev);
ch->dma.setprd = sata_channel_dmasetprd;
/* Clear work area */
KASSERT(sc->sc_edma_qlen * (sizeof(struct sata_crqb) +
sizeof(struct sata_crpb)) <= ch->dma.max_iosize,
("insufficient DMA memory for request/response queues.\n"));
bzero(ch->dma.work, sc->sc_edma_qlen * (sizeof(struct sata_crqb) +
sizeof(struct sata_crpb)));
bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Turn off EDMA engine */
error = sata_edma_ctrl(dev, 0);
if (error) {
ata_dmafini(dev);
return (error);
}
/*
* Initialize EDMA engine:
* - Native Command Queuing off,
* - Non-Queued operation,
* - Host Queue Cache enabled.
*/
SATA_OUTL(sc, SATA_EDMA_CFG(ch->unit), SATA_EDMA_CFG_HQCACHE |
(sc->sc_version == 1) ? SATA_EDMA_CFG_QL128 : 0);
/* Set request queue pointers */
work = ch->dma.work_bus;
SATA_OUTL(sc, SATA_EDMA_REQBAHR(ch->unit), work >> 32);
SATA_OUTL(sc, SATA_EDMA_REQIPR(ch->unit), work & 0xFFFFFFFF);
SATA_OUTL(sc, SATA_EDMA_REQOPR(ch->unit), work & 0xFFFFFFFF);
/* Set response queue pointers */
work += sc->sc_edma_qlen * sizeof(struct sata_crqb);
SATA_OUTL(sc, SATA_EDMA_RESBAHR(ch->unit), work >> 32);
SATA_OUTL(sc, SATA_EDMA_RESIPR(ch->unit), work & 0xFFFFFFFF);
SATA_OUTL(sc, SATA_EDMA_RESOPR(ch->unit), work & 0xFFFFFFFF);
/* Clear any outstanding interrupts */
ATA_IDX_OUTL(ch, ATA_SERROR, ATA_IDX_INL(ch, ATA_SERROR));
SATA_OUTL(sc, SATA_SATA_FISICR(ch->unit), 0);
SATA_OUTL(sc, SATA_EDMA_IECR(ch->unit), 0);
SATA_OUTL(sc, SATA_ICR,
~(SATA_ICR_DEV(ch->unit) | SATA_ICR_DMADONE(ch->unit)));
/* Umask channel interrupts */
SATA_OUTL(sc, SATA_EDMA_IEMR(ch->unit), 0xFFFFFFFF);
SATA_OUTL(sc, SATA_MIMR, SATA_INL(sc, SATA_MIMR) |
SATA_MICR_DONE(ch->unit) | SATA_MICR_DMADONE(ch->unit) |
SATA_MICR_ERR(ch->unit));
ch->attached = 1;
return (ata_attach(dev));
}
static int
sata_channel_detach(device_t dev)
{
struct sata_softc *sc;
struct ata_channel *ch;
int error;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
if (!ch->attached)
return (0);
/* Turn off EDMA engine */
sata_edma_ctrl(dev, 0);
/* Mask chanel interrupts */
SATA_OUTL(sc, SATA_EDMA_IEMR(ch->unit), 0);
SATA_OUTL(sc, SATA_MIMR, SATA_INL(sc, SATA_MIMR) & ~(
SATA_MICR_DONE(ch->unit) | SATA_MICR_DMADONE(ch->unit) |
SATA_MICR_ERR(ch->unit)));
error = ata_detach(dev);
ata_dmafini(dev);
ch->attached = 0;
return (error);
}
static int
sata_channel_begin_transaction(struct ata_request *request)
{
struct sata_softc *sc;
struct ata_channel *ch;
struct sata_crqb *crqb;
uint32_t req_in;
int error, slot;
sc = device_get_softc(device_get_parent(request->parent));
ch = device_get_softc(request->parent);
mtx_assert(&ch->state_mtx, MA_OWNED);
/* Only DMA R/W goes through the EDMA machine. */
if (request->u.ata.command != ATA_READ_DMA &&
request->u.ata.command != ATA_WRITE_DMA &&
request->u.ata.command != ATA_READ_DMA48 &&
request->u.ata.command != ATA_WRITE_DMA48) {
/* Disable EDMA before accessing legacy registers */
if (sata_edma_is_running(request->parent)) {
error = sata_edma_ctrl(request->parent, 0);
if (error) {
request->result = error;
return (ATA_OP_FINISHED);
}
}
return (ata_begin_transaction(request));
}
/* Prepare data for DMA */
if ((error = ch->dma.load(request, NULL, NULL))) {
device_printf(request->parent, "setting up DMA failed!\n");
request->result = error;
return ATA_OP_FINISHED;
}
/* Get next free queue slot */
req_in = SATA_INL(sc, SATA_EDMA_REQIPR(ch->unit));
slot = (req_in & sc->sc_edma_reqis_mask) >> SATA_EDMA_REQIS_OFS;
crqb = (struct sata_crqb *)(ch->dma.work +
(slot << SATA_EDMA_REQIS_OFS));
/* Fill in request */
bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
crqb->crqb_prdlo = htole32((uint64_t)request->dma->sg_bus & 0xFFFFFFFF);
crqb->crqb_prdhi = htole32((uint64_t)request->dma->sg_bus >> 32);
crqb->crqb_flags = htole32((request->flags & ATA_R_READ ? 0x01 : 0x00) |
(request->tag << 1));
crqb->crqb_ata_command = request->u.ata.command;
crqb->crqb_ata_feature = request->u.ata.feature;
crqb->crqb_ata_lba_low = request->u.ata.lba;
crqb->crqb_ata_lba_mid = request->u.ata.lba >> 8;
crqb->crqb_ata_lba_high = request->u.ata.lba >> 16;
crqb->crqb_ata_device = ((request->u.ata.lba >> 24) & 0x0F) | (1 << 6);
crqb->crqb_ata_lba_low_p = request->u.ata.lba >> 24;
crqb->crqb_ata_lba_mid_p = request->u.ata.lba >> 32;
crqb->crqb_ata_lba_high_p = request->u.ata.lba >> 40;
crqb->crqb_ata_feature_p = request->u.ata.feature >> 8;
crqb->crqb_ata_count = request->u.ata.count;
crqb->crqb_ata_count_p = request->u.ata.count >> 8;
bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Enable EDMA if disabled */
if (!sata_edma_is_running(request->parent)) {
error = sata_edma_ctrl(request->parent, 1);
if (error) {
ch->dma.unload(request);
request->result = error;
return (ATA_OP_FINISHED);
}
}
/* Tell EDMA about new request */
req_in = (req_in & ~sc->sc_edma_reqis_mask) | (((slot + 1) <<
SATA_EDMA_REQIS_OFS) & sc->sc_edma_reqis_mask);
SATA_OUTL(sc, SATA_EDMA_REQIPR(ch->unit), req_in);
return (ATA_OP_CONTINUES);
}
static int
sata_channel_end_transaction(struct ata_request *request)
{
struct sata_softc *sc;
struct ata_channel *ch;
struct sata_crpb *crpb;
uint32_t res_in, res_out, icr;
int slot;
sc = device_get_softc(device_get_parent(request->parent));
ch = device_get_softc(request->parent);
mtx_assert(&ch->state_mtx, MA_OWNED);
icr = SATA_INL(sc, SATA_ICR);
if (icr & SATA_ICR_DMADONE(ch->unit)) {
/* Get current response slot */
res_out = SATA_INL(sc, SATA_EDMA_RESOPR(ch->unit));
slot = (res_out & sc->sc_edma_resos_mask) >>
SATA_EDMA_RESOS_OFS;
crpb = (struct sata_crpb *)(ch->dma.work +
(sc->sc_edma_qlen * sizeof(struct sata_crqb)) +
(slot << SATA_EDMA_RESOS_OFS));
/* Record this request status */
bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
request->status = crpb->crpb_dev_status;
request->error = 0;
bus_dmamap_sync(ch->dma.work_tag, ch->dma.work_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Update response queue pointer */
res_out = (res_out & ~sc->sc_edma_resos_mask) | (((slot + 1) <<
SATA_EDMA_RESOS_OFS) & sc->sc_edma_resos_mask);
SATA_OUTL(sc, SATA_EDMA_RESOPR(ch->unit), res_out);
/* Ack DMA interrupt if there is nothing more to do */
res_in = SATA_INL(sc, SATA_EDMA_RESIPR(ch->unit));
res_in &= sc->sc_edma_resos_mask;
res_out &= sc->sc_edma_resos_mask;
if (res_in == res_out)
SATA_OUTL(sc, SATA_ICR,
~SATA_ICR_DMADONE(ch->unit));
/* Update progress */
if (!(request->status & ATA_S_ERROR) &&
!(request->flags & ATA_R_TIMEOUT))
request->donecount = request->bytecount;
/* Unload DMA data */
ch->dma.unload(request);
return(ATA_OP_FINISHED);
}
/* Legacy ATA interrupt */
return (ata_end_transaction(request));
}
static int
sata_channel_status(device_t dev)
{
struct sata_softc *sc;
struct ata_channel *ch;
uint32_t icr, iecr;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
icr = SATA_INL(sc, SATA_ICR);
iecr = SATA_INL(sc, SATA_EDMA_IECR(ch->unit));
if ((icr & SATA_ICR_DEV(ch->unit)) || iecr) {
/* Disable EDMA before accessing SATA registers */
sata_edma_ctrl(dev, 0);
ata_sata_phy_check_events(dev, -1);
/* Ack device and error interrupt */
SATA_OUTL(sc, SATA_ICR, ~SATA_ICR_DEV(ch->unit));
SATA_OUTL(sc, SATA_EDMA_IECR(ch->unit), 0);
}
icr &= SATA_ICR_DEV(ch->unit) | SATA_ICR_DMADONE(ch->unit);
return (icr);
}
static void
sata_channel_reset(device_t dev)
{
struct sata_softc *sc;
struct ata_channel *ch;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
/* Disable EDMA before using legacy registers */
sata_edma_ctrl(dev, 0);
/* Mask all EDMA interrups */
SATA_OUTL(sc, SATA_EDMA_IEMR(ch->unit), 0);
/* Reset EDMA */
SATA_OUTL(sc, SATA_EDMA_CMD(ch->unit), SATA_EDMA_CMD_RESET);
DELAY(25);
SATA_OUTL(sc, SATA_EDMA_CMD(ch->unit), 0);
/* Reset PHY and device */
if (ata_sata_phy_reset(dev, -1, 1))
ata_generic_reset(dev);
else
ch->devices = 0;
/* Clear EDMA errors */
SATA_OUTL(sc, SATA_SATA_FISICR(ch->unit), 0);
SATA_OUTL(sc, SATA_EDMA_IECR(ch->unit), 0);
/* Unmask all EDMA interrups */
SATA_OUTL(sc, SATA_EDMA_IEMR(ch->unit), 0xFFFFFFFF);
}
static int
sata_channel_setmode(device_t parent, int target, int mode)
{
/* Disable EDMA before using legacy registers */
sata_edma_ctrl(parent, 0);
return (ata_sata_setmode(parent, target, mode));
}
static int
sata_channel_getrev(device_t parent, int target)
{
/* Disable EDMA before using legacy registers */
sata_edma_ctrl(parent, 0);
return (ata_sata_getrev(parent, target));
}
static void
sata_channel_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs,
int error)
{
struct ata_dmasetprd_args *args;
struct sata_prdentry *prd;
int i;
args = xsc;
prd = args->dmatab;
if ((args->error = error))
return;
for (i = 0; i < nsegs; i++) {
prd[i].prd_addrlo = htole32(segs[i].ds_addr);
prd[i].prd_addrhi = htole32((uint64_t)segs[i].ds_addr >> 32);
prd[i].prd_count = htole32(segs[i].ds_len);
}
prd[i - 1].prd_count |= htole32(ATA_DMA_EOT);
KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries.\n"));
args->nsegs = nsegs;
}
static int
sata_edma_ctrl(device_t dev, int on)
{
struct sata_softc *sc;
struct ata_channel *ch;
int bit, timeout;
uint32_t reg;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
bit = on ? SATA_EDMA_CMD_ENABLE : SATA_EDMA_CMD_DISABLE;
timeout = EDMA_TIMEOUT;
SATA_OUTL(sc, SATA_EDMA_CMD(ch->unit), bit);
while (1) {
DELAY(1);
reg = SATA_INL(sc, SATA_EDMA_CMD(ch->unit));
/* Enable bit will be 1 after disable command completion */
if (on && (reg & SATA_EDMA_CMD_ENABLE))
break;
/* Disable bit will be 0 after disable command completion */
if (!on && !(reg & SATA_EDMA_CMD_DISABLE))
break;
if (timeout-- <= 0) {
device_printf(dev, "EDMA command timeout!\n");
return (ETIMEDOUT);
}
}
return (0);
}
static int
sata_edma_is_running(device_t dev)
{
struct sata_softc *sc;
struct ata_channel *ch;
sc = device_get_softc(device_get_parent(dev));
ch = device_get_softc(dev);
return (SATA_INL(sc, SATA_EDMA_CMD(ch->unit)) & SATA_EDMA_CMD_ENABLE);
}
static device_method_t sata_channel_methods[] = {
/* Device interface. */
DEVMETHOD(device_probe, sata_channel_probe),
DEVMETHOD(device_attach, sata_channel_attach),
DEVMETHOD(device_detach, sata_channel_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, ata_suspend),
DEVMETHOD(device_resume, ata_resume),
/* ATA channel interface */
DEVMETHOD(ata_reset, sata_channel_reset),
DEVMETHOD(ata_setmode, sata_channel_setmode),
DEVMETHOD(ata_getrev, sata_channel_getrev),
{ 0, 0 }
};
driver_t sata_channel_driver = {
"ata",
sata_channel_methods,
sizeof(struct ata_channel),
};
DRIVER_MODULE(ata, sata, sata_channel_driver, ata_devclass, 0, 0);