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NetBSD/sys/dev/pci/pciide_common.c

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/* $NetBSD: pciide_common.c,v 1.11 2004/05/25 20:42:41 thorpej Exp $ */
/*
* Copyright (c) 1999, 2000, 2001, 2003 Manuel Bouyer.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
*/
/*
* Copyright (c) 1996, 1998 Christopher G. Demetriou. 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.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
/*
* PCI IDE controller driver.
*
* Author: Christopher G. Demetriou, March 2, 1998 (derived from NetBSD
* sys/dev/pci/ppb.c, revision 1.16).
*
* See "PCI IDE Controller Specification, Revision 1.0 3/4/94" and
* "Programming Interface for Bus Master IDE Controller, Revision 1.0
* 5/16/94" from the PCI SIG.
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pciide_common.c,v 1.11 2004/05/25 20:42:41 thorpej Exp $");
#include <sys/param.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciidereg.h>
#include <dev/pci/pciidevar.h>
#include <dev/ic/wdcreg.h>
#ifdef WDCDEBUG
int wdcdebug_pciide_mask = 0;
#endif
static const char dmaerrfmt[] =
"%s:%d: unable to %s table DMA map for drive %d, error=%d\n";
/* Default product description for devices not known from this controller */
const struct pciide_product_desc default_product_desc = {
0,
0,
"Generic PCI IDE controller",
default_chip_map,
};
const struct pciide_product_desc *
pciide_lookup_product(id, pp)
pcireg_t id;
const struct pciide_product_desc *pp;
{
for (; pp->chip_map != NULL; pp++)
if (PCI_PRODUCT(id) == pp->ide_product)
break;
if (pp->chip_map == NULL)
return NULL;
return pp;
}
void
pciide_common_attach(sc, pa, pp)
struct pciide_softc *sc;
struct pci_attach_args *pa;
const struct pciide_product_desc *pp;
{
pci_chipset_tag_t pc = pa->pa_pc;
pcitag_t tag = pa->pa_tag;
pcireg_t csr;
char devinfo[256];
const char *displaydev;
aprint_naive(": disk controller\n");
aprint_normal("\n");
sc->sc_pci_id = pa->pa_id;
if (pp == NULL) {
/* should only happen for generic pciide devices */
sc->sc_pp = &default_product_desc;
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
displaydev = devinfo;
} else {
sc->sc_pp = pp;
displaydev = sc->sc_pp->ide_name;
}
/* if displaydev == NULL, printf is done in chip-specific map */
if (displaydev)
aprint_normal("%s: %s (rev. 0x%02x)\n",
sc->sc_wdcdev.sc_dev.dv_xname, displaydev,
PCI_REVISION(pa->pa_class));
sc->sc_pc = pa->pa_pc;
sc->sc_tag = pa->pa_tag;
/* Set up DMA defaults; these might be adjusted by chip_map. */
sc->sc_dma_maxsegsz = IDEDMA_BYTE_COUNT_MAX;
sc->sc_dma_boundary = IDEDMA_BYTE_COUNT_ALIGN;
#ifdef WDCDEBUG
if (wdcdebug_pciide_mask & DEBUG_PROBE)
pci_conf_print(sc->sc_pc, sc->sc_tag, NULL);
#endif
sc->sc_pp->chip_map(sc, pa);
if (sc->sc_dma_ok) {
csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
csr |= PCI_COMMAND_MASTER_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
}
WDCDEBUG_PRINT(("pciide: command/status register=%x\n",
pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG)), DEBUG_PROBE);
}
/* tell whether the chip is enabled or not */
int
pciide_chipen(sc, pa)
struct pciide_softc *sc;
struct pci_attach_args *pa;
{
pcireg_t csr;
if ((pa->pa_flags & PCI_FLAGS_IO_ENABLED) == 0) {
csr = pci_conf_read(sc->sc_pc, sc->sc_tag,
PCI_COMMAND_STATUS_REG);
aprint_normal("%s: device disabled (at %s)\n",
sc->sc_wdcdev.sc_dev.dv_xname,
(csr & PCI_COMMAND_IO_ENABLE) == 0 ?
"device" : "bridge");
return 0;
}
return 1;
}
void
pciide_mapregs_compat(pa, cp, compatchan, cmdsizep, ctlsizep)
struct pci_attach_args *pa;
struct pciide_channel *cp;
int compatchan;
bus_size_t *cmdsizep, *ctlsizep;
{
struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.ch_wdc;
struct wdc_channel *wdc_cp = &cp->wdc_channel;
int i;
cp->compat = 1;
*cmdsizep = PCIIDE_COMPAT_CMD_SIZE;
*ctlsizep = PCIIDE_COMPAT_CTL_SIZE;
wdc_cp->cmd_iot = pa->pa_iot;
if (bus_space_map(wdc_cp->cmd_iot, PCIIDE_COMPAT_CMD_BASE(compatchan),
PCIIDE_COMPAT_CMD_SIZE, 0, &wdc_cp->cmd_baseioh) != 0) {
aprint_error("%s: couldn't map %s channel cmd regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
goto bad;
}
wdc_cp->ctl_iot = pa->pa_iot;
if (bus_space_map(wdc_cp->ctl_iot, PCIIDE_COMPAT_CTL_BASE(compatchan),
PCIIDE_COMPAT_CTL_SIZE, 0, &wdc_cp->ctl_ioh) != 0) {
aprint_error("%s: couldn't map %s channel ctl regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
bus_space_unmap(wdc_cp->cmd_iot, wdc_cp->cmd_baseioh,
PCIIDE_COMPAT_CMD_SIZE);
goto bad;
}
for (i = 0; i < WDC_NREG; i++) {
if (bus_space_subregion(wdc_cp->cmd_iot, wdc_cp->cmd_baseioh, i,
i == 0 ? 4 : 1, &wdc_cp->cmd_iohs[i]) != 0) {
aprint_error("%s: couldn't subregion %s channel "
"cmd regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
goto bad;
}
}
wdc_init_shadow_regs(wdc_cp);
wdc_cp->data32iot = wdc_cp->cmd_iot;
wdc_cp->data32ioh = wdc_cp->cmd_iohs[0];
pciide_map_compat_intr(pa, cp, compatchan);
return;
bad:
cp->wdc_channel.ch_flags |= WDCF_DISABLED;
return;
}
void
pciide_mapregs_native(pa, cp, cmdsizep, ctlsizep, pci_intr)
struct pci_attach_args * pa;
struct pciide_channel *cp;
bus_size_t *cmdsizep, *ctlsizep;
int (*pci_intr) __P((void *));
{
struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.ch_wdc;
struct wdc_channel *wdc_cp = &cp->wdc_channel;
const char *intrstr;
pci_intr_handle_t intrhandle;
int i;
cp->compat = 0;
if (sc->sc_pci_ih == NULL) {
if (pci_intr_map(pa, &intrhandle) != 0) {
aprint_error("%s: couldn't map native-PCI interrupt\n",
sc->sc_wdcdev.sc_dev.dv_xname);
goto bad;
}
intrstr = pci_intr_string(pa->pa_pc, intrhandle);
sc->sc_pci_ih = pci_intr_establish(pa->pa_pc,
intrhandle, IPL_BIO, pci_intr, sc);
if (sc->sc_pci_ih != NULL) {
aprint_normal("%s: using %s for native-PCI interrupt\n",
sc->sc_wdcdev.sc_dev.dv_xname,
intrstr ? intrstr : "unknown interrupt");
} else {
aprint_error(
"%s: couldn't establish native-PCI interrupt",
sc->sc_wdcdev.sc_dev.dv_xname);
if (intrstr != NULL)
aprint_normal(" at %s", intrstr);
aprint_normal("\n");
goto bad;
}
}
cp->ih = sc->sc_pci_ih;
if (pci_mapreg_map(pa, PCIIDE_REG_CMD_BASE(wdc_cp->ch_channel),
PCI_MAPREG_TYPE_IO, 0,
&wdc_cp->cmd_iot, &wdc_cp->cmd_baseioh, NULL, cmdsizep) != 0) {
aprint_error("%s: couldn't map %s channel cmd regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
goto bad;
}
if (pci_mapreg_map(pa, PCIIDE_REG_CTL_BASE(wdc_cp->ch_channel),
PCI_MAPREG_TYPE_IO, 0,
&wdc_cp->ctl_iot, &cp->ctl_baseioh, NULL, ctlsizep) != 0) {
aprint_error("%s: couldn't map %s channel ctl regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
bus_space_unmap(wdc_cp->cmd_iot, wdc_cp->cmd_baseioh,
*cmdsizep);
goto bad;
}
/*
* In native mode, 4 bytes of I/O space are mapped for the control
* register, the control register is at offset 2. Pass the generic
* code a handle for only one byte at the right offset.
*/
if (bus_space_subregion(wdc_cp->ctl_iot, cp->ctl_baseioh, 2, 1,
&wdc_cp->ctl_ioh) != 0) {
aprint_error("%s: unable to subregion %s channel ctl regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
bus_space_unmap(wdc_cp->cmd_iot, wdc_cp->cmd_baseioh,
*cmdsizep);
bus_space_unmap(wdc_cp->cmd_iot, cp->ctl_baseioh, *ctlsizep);
goto bad;
}
for (i = 0; i < WDC_NREG; i++) {
if (bus_space_subregion(wdc_cp->cmd_iot, wdc_cp->cmd_baseioh, i,
i == 0 ? 4 : 1, &wdc_cp->cmd_iohs[i]) != 0) {
aprint_error("%s: couldn't subregion %s channel "
"cmd regs\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
goto bad;
}
}
wdc_init_shadow_regs(wdc_cp);
wdc_cp->data32iot = wdc_cp->cmd_iot;
wdc_cp->data32ioh = wdc_cp->cmd_iohs[0];
return;
bad:
cp->wdc_channel.ch_flags |= WDCF_DISABLED;
return;
}
void
pciide_mapreg_dma(sc, pa)
struct pciide_softc *sc;
struct pci_attach_args *pa;
{
pcireg_t maptype;
bus_addr_t addr;
struct pciide_channel *pc;
int reg, chan;
bus_size_t size;
/*
* Map DMA registers
*
* Note that sc_dma_ok is the right variable to test to see if
* DMA can be done. If the interface doesn't support DMA,
* sc_dma_ok will never be non-zero. If the DMA regs couldn't
* be mapped, it'll be zero. I.e., sc_dma_ok will only be
* non-zero if the interface supports DMA and the registers
* could be mapped.
*
* XXX Note that despite the fact that the Bus Master IDE specs
* XXX say that "The bus master IDE function uses 16 bytes of IO
* XXX space," some controllers (at least the United
* XXX Microelectronics UM8886BF) place it in memory space.
*/
maptype = pci_mapreg_type(pa->pa_pc, pa->pa_tag,
PCIIDE_REG_BUS_MASTER_DMA);
switch (maptype) {
case PCI_MAPREG_TYPE_IO:
sc->sc_dma_ok = (pci_mapreg_info(pa->pa_pc, pa->pa_tag,
PCIIDE_REG_BUS_MASTER_DMA, PCI_MAPREG_TYPE_IO,
&addr, NULL, NULL) == 0);
if (sc->sc_dma_ok == 0) {
aprint_normal(
", but unused (couldn't query registers)");
break;
}
if ((sc->sc_pp->ide_flags & IDE_16BIT_IOSPACE)
&& addr >= 0x10000) {
sc->sc_dma_ok = 0;
aprint_normal(
", but unused (registers at unsafe address "
"%#lx)", (unsigned long)addr);
break;
}
/* FALLTHROUGH */
case PCI_MAPREG_MEM_TYPE_32BIT:
sc->sc_dma_ok = (pci_mapreg_map(pa,
PCIIDE_REG_BUS_MASTER_DMA, maptype, 0,
&sc->sc_dma_iot, &sc->sc_dma_ioh, NULL, NULL) == 0);
sc->sc_dmat = pa->pa_dmat;
if (sc->sc_dma_ok == 0) {
aprint_normal(", but unused (couldn't map registers)");
} else {
sc->sc_wdcdev.dma_arg = sc;
sc->sc_wdcdev.dma_init = pciide_dma_init;
sc->sc_wdcdev.dma_start = pciide_dma_start;
sc->sc_wdcdev.dma_finish = pciide_dma_finish;
}
if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags &
PCIIDE_OPTIONS_NODMA) {
aprint_normal(
", but unused (forced off by config file)");
sc->sc_dma_ok = 0;
}
break;
default:
sc->sc_dma_ok = 0;
aprint_normal(
", but unsupported register maptype (0x%x)", maptype);
}
/*
* Set up the default handles for the DMA registers.
* Just reserve 32 bits for each handle, unless space
* doesn't permit it.
*/
for (chan = 0; chan < PCIIDE_NUM_CHANNELS; chan++) {
pc = &sc->pciide_channels[chan];
for (reg = 0; reg < IDEDMA_NREGS; reg++) {
size = 4;
if (size > (IDEDMA_SCH_OFFSET - reg))
size = IDEDMA_SCH_OFFSET - reg;
if (bus_space_subregion(sc->sc_dma_iot, sc->sc_dma_ioh,
IDEDMA_SCH_OFFSET * chan + reg, size,
&pc->dma_iohs[reg]) != 0) {
sc->sc_dma_ok = 0;
aprint_normal(", but can't subregion offset %d "
"size %lu", reg, (u_long)size);
return;
}
}
}
}
int
pciide_compat_intr(arg)
void *arg;
{
struct pciide_channel *cp = arg;
#ifdef DIAGNOSTIC
/* should only be called for a compat channel */
if (cp->compat == 0)
panic("pciide compat intr called for non-compat chan %p", cp);
#endif
return (wdcintr(&cp->wdc_channel));
}
int
pciide_pci_intr(arg)
void *arg;
{
struct pciide_softc *sc = arg;
struct pciide_channel *cp;
struct wdc_channel *wdc_cp;
int i, rv, crv;
rv = 0;
for (i = 0; i < sc->sc_wdcdev.nchannels; i++) {
cp = &sc->pciide_channels[i];
wdc_cp = &cp->wdc_channel;
/* If a compat channel skip. */
if (cp->compat)
continue;
/* if this channel not waiting for intr, skip */
if ((wdc_cp->ch_flags & WDCF_IRQ_WAIT) == 0)
continue;
crv = wdcintr(wdc_cp);
if (crv == 0)
; /* leave rv alone */
else if (crv == 1)
rv = 1; /* claim the intr */
else if (rv == 0) /* crv should be -1 in this case */
rv = crv; /* if we've done no better, take it */
}
return (rv);
}
void
pciide_channel_dma_setup(cp)
struct pciide_channel *cp;
{
int drive;
struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.ch_wdc;
struct ata_drive_datas *drvp;
for (drive = 0; drive < 2; drive++) {
drvp = &cp->wdc_channel.ch_drive[drive];
/* If no drive, skip */
if ((drvp->drive_flags & DRIVE) == 0)
continue;
/* setup DMA if needed */
if (((drvp->drive_flags & DRIVE_DMA) == 0 &&
(drvp->drive_flags & DRIVE_UDMA) == 0) ||
sc->sc_dma_ok == 0) {
drvp->drive_flags &= ~(DRIVE_DMA | DRIVE_UDMA);
continue;
}
if (pciide_dma_table_setup(sc, cp->wdc_channel.ch_channel,
drive) != 0) {
/* Abort DMA setup */
drvp->drive_flags &= ~(DRIVE_DMA | DRIVE_UDMA);
continue;
}
}
}
int
pciide_dma_table_setup(sc, channel, drive)
struct pciide_softc *sc;
int channel, drive;
{
bus_dma_segment_t seg;
int error, rseg;
const bus_size_t dma_table_size =
sizeof(struct idedma_table) * NIDEDMA_TABLES;
struct pciide_dma_maps *dma_maps =
&sc->pciide_channels[channel].dma_maps[drive];
/* If table was already allocated, just return */
if (dma_maps->dma_table)
return 0;
/* Allocate memory for the DMA tables and map it */
if ((error = bus_dmamem_alloc(sc->sc_dmat, dma_table_size,
IDEDMA_TBL_ALIGN, IDEDMA_TBL_ALIGN, &seg, 1, &rseg,
BUS_DMA_NOWAIT)) != 0) {
aprint_error(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"allocate", drive, error);
return error;
}
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
dma_table_size,
(caddr_t *)&dma_maps->dma_table,
BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
aprint_error(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"map", drive, error);
return error;
}
WDCDEBUG_PRINT(("pciide_dma_table_setup: table at %p len %lu, "
"phy 0x%lx\n", dma_maps->dma_table, (u_long)dma_table_size,
(unsigned long)seg.ds_addr), DEBUG_PROBE);
/* Create and load table DMA map for this disk */
if ((error = bus_dmamap_create(sc->sc_dmat, dma_table_size,
1, dma_table_size, IDEDMA_TBL_ALIGN, BUS_DMA_NOWAIT,
&dma_maps->dmamap_table)) != 0) {
aprint_error(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"create", drive, error);
return error;
}
if ((error = bus_dmamap_load(sc->sc_dmat,
dma_maps->dmamap_table,
dma_maps->dma_table,
dma_table_size, NULL, BUS_DMA_NOWAIT)) != 0) {
aprint_error(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"load", drive, error);
return error;
}
WDCDEBUG_PRINT(("pciide_dma_table_setup: phy addr of table 0x%lx\n",
(unsigned long)dma_maps->dmamap_table->dm_segs[0].ds_addr),
DEBUG_PROBE);
/* Create a xfer DMA map for this drive */
if ((error = bus_dmamap_create(sc->sc_dmat, IDEDMA_BYTE_COUNT_MAX,
NIDEDMA_TABLES, sc->sc_dma_maxsegsz, sc->sc_dma_boundary,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&dma_maps->dmamap_xfer)) != 0) {
aprint_error(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"create xfer", drive, error);
return error;
}
return 0;
}
int
pciide_dma_init(v, channel, drive, databuf, datalen, flags)
void *v;
int channel, drive;
void *databuf;
size_t datalen;
int flags;
{
struct pciide_softc *sc = v;
int error, seg;
struct pciide_channel *cp = &sc->pciide_channels[channel];
struct pciide_dma_maps *dma_maps = &cp->dma_maps[drive];
error = bus_dmamap_load(sc->sc_dmat,
dma_maps->dmamap_xfer,
databuf, datalen, NULL, BUS_DMA_NOWAIT | BUS_DMA_STREAMING |
((flags & WDC_DMA_READ) ? BUS_DMA_READ : BUS_DMA_WRITE));
if (error) {
printf(dmaerrfmt, sc->sc_wdcdev.sc_dev.dv_xname, channel,
"load xfer", drive, error);
return error;
}
bus_dmamap_sync(sc->sc_dmat, dma_maps->dmamap_xfer, 0,
dma_maps->dmamap_xfer->dm_mapsize,
(flags & WDC_DMA_READ) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
for (seg = 0; seg < dma_maps->dmamap_xfer->dm_nsegs; seg++) {
#ifdef DIAGNOSTIC
/* A segment must not cross a 64k boundary */
{
u_long phys = dma_maps->dmamap_xfer->dm_segs[seg].ds_addr;
u_long len = dma_maps->dmamap_xfer->dm_segs[seg].ds_len;
if ((phys & ~IDEDMA_BYTE_COUNT_MASK) !=
((phys + len - 1) & ~IDEDMA_BYTE_COUNT_MASK)) {
printf("pciide_dma: segment %d physical addr 0x%lx"
" len 0x%lx not properly aligned\n",
seg, phys, len);
panic("pciide_dma: buf align");
}
}
#endif
dma_maps->dma_table[seg].base_addr =
htole32(dma_maps->dmamap_xfer->dm_segs[seg].ds_addr);
dma_maps->dma_table[seg].byte_count =
htole32(dma_maps->dmamap_xfer->dm_segs[seg].ds_len &
IDEDMA_BYTE_COUNT_MASK);
WDCDEBUG_PRINT(("\t seg %d len %d addr 0x%x\n",
seg, le32toh(dma_maps->dma_table[seg].byte_count),
le32toh(dma_maps->dma_table[seg].base_addr)), DEBUG_DMA);
}
dma_maps->dma_table[dma_maps->dmamap_xfer->dm_nsegs -1].byte_count |=
htole32(IDEDMA_BYTE_COUNT_EOT);
bus_dmamap_sync(sc->sc_dmat, dma_maps->dmamap_table, 0,
dma_maps->dmamap_table->dm_mapsize,
BUS_DMASYNC_PREWRITE);
/* Maps are ready. Start DMA function */
#ifdef DIAGNOSTIC
if (dma_maps->dmamap_table->dm_segs[0].ds_addr & ~IDEDMA_TBL_MASK) {
printf("pciide_dma_init: addr 0x%lx not properly aligned\n",
(u_long)dma_maps->dmamap_table->dm_segs[0].ds_addr);
panic("pciide_dma_init: table align");
}
#endif
/* Clear status bits */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
bus_space_read_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0));
/* Write table addr */
bus_space_write_4(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_TBL], 0,
dma_maps->dmamap_table->dm_segs[0].ds_addr);
/* set read/write */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CMD], 0,
((flags & WDC_DMA_READ) ? IDEDMA_CMD_WRITE : 0) | cp->idedma_cmd);
/* remember flags */
dma_maps->dma_flags = flags;
return 0;
}
void
pciide_dma_start(v, channel, drive)
void *v;
int channel, drive;
{
struct pciide_softc *sc = v;
struct pciide_channel *cp = &sc->pciide_channels[channel];
WDCDEBUG_PRINT(("pciide_dma_start\n"),DEBUG_XFERS);
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CMD], 0,
bus_space_read_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CMD], 0)
| IDEDMA_CMD_START);
}
int
pciide_dma_finish(v, channel, drive, force)
void *v;
int channel, drive;
int force;
{
struct pciide_softc *sc = v;
u_int8_t status;
int error = 0;
struct pciide_channel *cp = &sc->pciide_channels[channel];
struct pciide_dma_maps *dma_maps = &cp->dma_maps[drive];
status = bus_space_read_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0);
WDCDEBUG_PRINT(("pciide_dma_finish: status 0x%x\n", status),
DEBUG_XFERS);
if (force == 0 && (status & IDEDMA_CTL_INTR) == 0)
return WDC_DMAST_NOIRQ;
/* stop DMA channel */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CMD], 0,
bus_space_read_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CMD], 0)
& ~IDEDMA_CMD_START);
/* Unload the map of the data buffer */
bus_dmamap_sync(sc->sc_dmat, dma_maps->dmamap_xfer, 0,
dma_maps->dmamap_xfer->dm_mapsize,
(dma_maps->dma_flags & WDC_DMA_READ) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_dmat, dma_maps->dmamap_xfer);
if ((status & IDEDMA_CTL_ERR) != 0) {
printf("%s:%d:%d: bus-master DMA error: status=0x%x\n",
sc->sc_wdcdev.sc_dev.dv_xname, channel, drive, status);
error |= WDC_DMAST_ERR;
}
if ((status & IDEDMA_CTL_INTR) == 0) {
printf("%s:%d:%d: bus-master DMA error: missing interrupt, "
"status=0x%x\n", sc->sc_wdcdev.sc_dev.dv_xname, channel,
drive, status);
error |= WDC_DMAST_NOIRQ;
}
if ((status & IDEDMA_CTL_ACT) != 0) {
/* data underrun, may be a valid condition for ATAPI */
error |= WDC_DMAST_UNDER;
}
return error;
}
void
pciide_irqack(chp)
struct wdc_channel *chp;
{
struct pciide_channel *cp = (struct pciide_channel*)chp;
struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.ch_wdc;
/* clear status bits in IDE DMA registers */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
bus_space_read_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0));
}
/* some common code used by several chip_map */
int
pciide_chansetup(sc, channel, interface)
struct pciide_softc *sc;
int channel;
pcireg_t interface;
{
struct pciide_channel *cp = &sc->pciide_channels[channel];
sc->wdc_chanarray[channel] = &cp->wdc_channel;
cp->name = PCIIDE_CHANNEL_NAME(channel);
cp->wdc_channel.ch_channel = channel;
cp->wdc_channel.ch_wdc = &sc->sc_wdcdev;
cp->wdc_channel.ch_queue =
malloc(sizeof(struct ata_queue), M_DEVBUF, M_NOWAIT);
if (cp->wdc_channel.ch_queue == NULL) {
aprint_error("%s %s channel: "
"can't allocate memory for command queue",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
return 0;
}
aprint_normal("%s: %s channel %s to %s mode\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name,
(interface & PCIIDE_INTERFACE_SETTABLE(channel)) ?
"configured" : "wired",
(interface & PCIIDE_INTERFACE_PCI(channel)) ?
"native-PCI" : "compatibility");
return 1;
}
/* some common code used by several chip channel_map */
void
pciide_mapchan(pa, cp, interface, cmdsizep, ctlsizep, pci_intr)
struct pci_attach_args *pa;
struct pciide_channel *cp;
pcireg_t interface;
bus_size_t *cmdsizep, *ctlsizep;
int (*pci_intr) __P((void *));
{
struct wdc_channel *wdc_cp = &cp->wdc_channel;
if (interface & PCIIDE_INTERFACE_PCI(wdc_cp->ch_channel))
pciide_mapregs_native(pa, cp, cmdsizep, ctlsizep, pci_intr);
else
pciide_mapregs_compat(pa, cp, wdc_cp->ch_channel, cmdsizep,
ctlsizep);
wdcattach(wdc_cp);
}
/*
* generic code to map the compat intr.
*/
void
pciide_map_compat_intr(pa, cp, compatchan)
struct pci_attach_args *pa;
struct pciide_channel *cp;
int compatchan;
{
struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.ch_wdc;
#ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
cp->ih = pciide_machdep_compat_intr_establish(&sc->sc_wdcdev.sc_dev,
pa, compatchan, pciide_compat_intr, cp);
if (cp->ih == NULL) {
#endif
aprint_error("%s: no compatibility interrupt for use by %s "
"channel\n", sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
cp->wdc_channel.ch_flags |= WDCF_DISABLED;
#ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
}
#endif
}
void
default_chip_map(sc, pa)
struct pciide_softc *sc;
struct pci_attach_args *pa;
{
struct pciide_channel *cp;
pcireg_t interface = PCI_INTERFACE(pa->pa_class);
pcireg_t csr;
int channel, drive;
struct ata_drive_datas *drvp;
u_int8_t idedma_ctl;
bus_size_t cmdsize, ctlsize;
char *failreason;
if (pciide_chipen(sc, pa) == 0)
return;
if (interface & PCIIDE_INTERFACE_BUS_MASTER_DMA) {
aprint_normal("%s: bus-master DMA support present",
sc->sc_wdcdev.sc_dev.dv_xname);
if (sc->sc_pp == &default_product_desc &&
(sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags &
PCIIDE_OPTIONS_DMA) == 0) {
aprint_normal(", but unused (no driver support)");
sc->sc_dma_ok = 0;
} else {
pciide_mapreg_dma(sc, pa);
if (sc->sc_dma_ok != 0)
aprint_normal(", used without full driver "
"support");
}
} else {
aprint_normal("%s: hardware does not support DMA",
sc->sc_wdcdev.sc_dev.dv_xname);
sc->sc_dma_ok = 0;
}
aprint_normal("\n");
if (sc->sc_dma_ok) {
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_IRQACK;
sc->sc_wdcdev.irqack = pciide_irqack;
}
sc->sc_wdcdev.PIO_cap = 0;
sc->sc_wdcdev.DMA_cap = 0;
sc->sc_wdcdev.channels = sc->wdc_chanarray;
sc->sc_wdcdev.nchannels = PCIIDE_NUM_CHANNELS;
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16;
for (channel = 0; channel < sc->sc_wdcdev.nchannels; channel++) {
cp = &sc->pciide_channels[channel];
if (pciide_chansetup(sc, channel, interface) == 0)
continue;
if (interface & PCIIDE_INTERFACE_PCI(channel))
pciide_mapregs_native(pa, cp, &cmdsize, &ctlsize,
pciide_pci_intr);
else
pciide_mapregs_compat(pa, cp,
cp->wdc_channel.ch_channel, &cmdsize, &ctlsize);
if (cp->wdc_channel.ch_flags & WDCF_DISABLED)
continue;
/*
* Check to see if something appears to be there.
*/
failreason = NULL;
/*
* In native mode, always enable the controller. It's
* not possible to have an ISA board using the same address
* anyway.
*/
if (interface & PCIIDE_INTERFACE_PCI(channel))
goto next;
if (!wdcprobe(&cp->wdc_channel)) {
failreason = "not responding; disabled or no drives?";
goto next;
}
/*
* Now, make sure it's actually attributable to this PCI IDE
* channel by trying to access the channel again while the
* PCI IDE controller's I/O space is disabled. (If the
* channel no longer appears to be there, it belongs to
* this controller.) YUCK!
*/
csr = pci_conf_read(sc->sc_pc, sc->sc_tag,
PCI_COMMAND_STATUS_REG);
pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG,
csr & ~PCI_COMMAND_IO_ENABLE);
if (wdcprobe(&cp->wdc_channel))
failreason = "other hardware responding at addresses";
pci_conf_write(sc->sc_pc, sc->sc_tag,
PCI_COMMAND_STATUS_REG, csr);
next:
if (failreason) {
aprint_error("%s: %s channel ignored (%s)\n",
sc->sc_wdcdev.sc_dev.dv_xname, cp->name,
failreason);
cp->wdc_channel.ch_flags |= WDCF_DISABLED;
bus_space_unmap(cp->wdc_channel.cmd_iot,
cp->wdc_channel.cmd_baseioh, cmdsize);
bus_space_unmap(cp->wdc_channel.ctl_iot,
cp->wdc_channel.ctl_ioh, ctlsize);
} else {
wdcattach(&cp->wdc_channel);
}
}
if (sc->sc_dma_ok == 0)
return;
/* Allocate DMA maps */
for (channel = 0; channel < sc->sc_wdcdev.nchannels; channel++) {
idedma_ctl = 0;
cp = &sc->pciide_channels[channel];
for (drive = 0; drive < 2; drive++) {
drvp = &cp->wdc_channel.ch_drive[drive];
/* If no drive, skip */
if ((drvp->drive_flags & DRIVE) == 0)
continue;
if ((drvp->drive_flags & DRIVE_DMA) == 0)
continue;
if (pciide_dma_table_setup(sc, channel, drive) != 0) {
/* Abort DMA setup */
aprint_error(
"%s:%d:%d: can't allocate DMA maps, "
"using PIO transfers\n",
sc->sc_wdcdev.sc_dev.dv_xname,
channel, drive);
drvp->drive_flags &= ~DRIVE_DMA;
}
aprint_normal("%s:%d:%d: using DMA data transfers\n",
sc->sc_wdcdev.sc_dev.dv_xname,
channel, drive);
idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
}
if (idedma_ctl != 0) {
/* Add software bits in status register */
bus_space_write_1(sc->sc_dma_iot,
cp->dma_iohs[IDEDMA_CTL], 0, idedma_ctl);
}
}
}
void
sata_setup_channel(chp)
struct wdc_channel *chp;
{
struct ata_drive_datas *drvp;
int drive;
u_int32_t idedma_ctl;
struct pciide_channel *cp = (struct pciide_channel*)chp;
struct pciide_softc *sc = (struct pciide_softc*)cp->wdc_channel.ch_wdc;
/* setup DMA if needed */
pciide_channel_dma_setup(cp);
idedma_ctl = 0;
for (drive = 0; drive < 2; drive++) {
drvp = &chp->ch_drive[drive];
/* If no drive, skip */
if ((drvp->drive_flags & DRIVE) == 0)
continue;
if (drvp->drive_flags & DRIVE_UDMA) {
/* use Ultra/DMA */
drvp->drive_flags &= ~DRIVE_DMA;
idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
} else if (drvp->drive_flags & DRIVE_DMA) {
idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
}
}
/*
* Nothing to do to setup modes; it is meaningless in S-ATA
* (but many S-ATA drives still want to get the SET_FEATURE
* command).
*/
if (idedma_ctl != 0) {
/* Add software bits in status register */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
idedma_ctl);
}
}
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