NetBSD-5.0.2/sys/arch/next68k/dev/nextdma.c
/* $NetBSD: nextdma.c,v 1.42 2006/05/14 21:55:39 elad Exp $ */
/*
* Copyright (c) 1998 Darrin B. Jewell
* 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 Darrin B. Jewell
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nextdma.c,v 1.42 2006/05/14 21:55:39 elad Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#define _M68K_BUS_DMA_PRIVATE
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <m68k/cacheops.h>
#include <next68k/next68k/isr.h>
#include <next68k/next68k/nextrom.h>
#include <next68k/dev/intiovar.h>
#include "nextdmareg.h"
#include "nextdmavar.h"
#include "esp.h"
#include "xe.h"
#if DEBUG
#define ND_DEBUG
#endif
extern int turbo;
#define panic __asm volatile("trap #15"); printf
#define NEXTDMA_DEBUG nextdma_debug
/* (nsc->sc_chan->nd_intr == NEXT_I_SCSI_DMA) && nextdma_debug */
#if defined(ND_DEBUG)
int nextdma_debug = 0;
#define DPRINTF(x) if (NEXTDMA_DEBUG) printf x;
int ndtraceshow = 0;
char ndtrace[8192+100];
char *ndtracep = ndtrace;
#define NDTRACEIF(x) if (10 && /* (nsc->sc_chan->nd_intr == NEXT_I_SCSI_DMA) && */ ndtracep < (ndtrace + 8192)) do {x;} while (0)
#else
#define DPRINTF(x)
#define NDTRACEIF(x)
#endif
#define PRINTF(x) printf x
#if defined(ND_DEBUG)
int nextdma_debug_enetr_idx = 0;
unsigned int nextdma_debug_enetr_state[100] = { 0 };
int nextdma_debug_scsi_idx = 0;
unsigned int nextdma_debug_scsi_state[100] = { 0 };
void nextdma_debug_initstate(struct nextdma_softc *);
void nextdma_debug_savestate(struct nextdma_softc *, unsigned int);
void nextdma_debug_scsi_dumpstate(void);
void nextdma_debug_enetr_dumpstate(void);
#endif
int nextdma_match(struct device *, struct cfdata *, void *);
void nextdma_attach(struct device *, struct device *, void *);
void nextdmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int);
int nextdma_continue(struct nextdma_softc *);
void nextdma_rotate(struct nextdma_softc *);
void nextdma_setup_cont_regs(struct nextdma_softc *);
void nextdma_setup_curr_regs(struct nextdma_softc *);
#if NESP > 0
static int nextdma_esp_intr(void *);
#endif
#if NXE > 0
static int nextdma_enet_intr(void *);
#endif
#define nd_bsr4(reg) \
bus_space_read_4(nsc->sc_bst, nsc->sc_bsh, (reg))
#define nd_bsw4(reg,val) \
bus_space_write_4(nsc->sc_bst, nsc->sc_bsh, (reg), (val))
CFATTACH_DECL(nextdma, sizeof(struct nextdma_softc),
nextdma_match, nextdma_attach, NULL, NULL);
static struct nextdma_channel nextdma_channel[] = {
#if NESP > 0
{ "scsi", NEXT_P_SCSI_CSR, DD_SIZE, NEXT_I_SCSI_DMA, &nextdma_esp_intr },
#endif
#if NXE > 0
{ "enetx", NEXT_P_ENETX_CSR, DD_SIZE, NEXT_I_ENETX_DMA, &nextdma_enet_intr },
{ "enetr", NEXT_P_ENETR_CSR, DD_SIZE, NEXT_I_ENETR_DMA, &nextdma_enet_intr },
#endif
};
static int nnextdma_channels = (sizeof(nextdma_channel)/sizeof(nextdma_channel[0]));
static int attached = 0;
struct nextdma_softc *
nextdma_findchannel(const char *name)
{
struct device *dev = TAILQ_FIRST(&alldevs);
while (dev != NULL) {
if (!strncmp(dev->dv_xname, "nextdma", 7)) {
struct nextdma_softc *nsc = (struct nextdma_softc *)dev;
if (!strcmp (nsc->sc_chan->nd_name, name))
return (nsc);
}
dev = TAILQ_NEXT(dev, dv_list);
}
return (NULL);
}
int
nextdma_match(struct device *parent, struct cfdata *match, void *aux)
{
struct intio_attach_args *ia = (struct intio_attach_args *)aux;
if (attached >= nnextdma_channels)
return (0);
ia->ia_addr = (void *)nextdma_channel[attached].nd_base;
return (1);
}
void
nextdma_attach(struct device *parent, struct device *self, void *aux)
{
struct nextdma_softc *nsc = (struct nextdma_softc *)self;
struct intio_attach_args *ia = (struct intio_attach_args *)aux;
if (attached >= nnextdma_channels)
return;
nsc->sc_chan = &nextdma_channel[attached];
nsc->sc_dmat = ia->ia_dmat;
nsc->sc_bst = ia->ia_bst;
if (bus_space_map(nsc->sc_bst, nsc->sc_chan->nd_base,
nsc->sc_chan->nd_size, 0, &nsc->sc_bsh)) {
panic("%s: can't map DMA registers for channel %s",
nsc->sc_dev.dv_xname, nsc->sc_chan->nd_name);
}
nextdma_init (nsc);
isrlink_autovec(nsc->sc_chan->nd_intrfunc, nsc,
NEXT_I_IPL(nsc->sc_chan->nd_intr), 10, NULL);
INTR_ENABLE(nsc->sc_chan->nd_intr);
printf (": channel %d (%s)\n", attached,
nsc->sc_chan->nd_name);
attached++;
return;
}
void
nextdma_init(struct nextdma_softc *nsc)
{
#ifdef ND_DEBUG
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("DMA init ipl (%ld) intr(0x%s)\n",
NEXT_I_IPL(nsc->sc_chan->nd_intr), sbuf);
}
#endif
nsc->sc_stat.nd_map = NULL;
nsc->sc_stat.nd_idx = 0;
nsc->sc_stat.nd_map_cont = NULL;
nsc->sc_stat.nd_idx_cont = 0;
nsc->sc_stat.nd_exception = 0;
nd_bsw4 (DD_CSR, DMACSR_RESET | DMACSR_CLRCOMPLETE);
nd_bsw4 (DD_CSR, 0);
#if 01
nextdma_setup_curr_regs(nsc);
nextdma_setup_cont_regs(nsc);
#endif
#if defined(DIAGNOSTIC)
{
u_long state;
state = nd_bsr4 (DD_CSR);
#if 1
/* mourning (a 25 MHz 68040 mono slab) appears to set BUSEXC
* milo (a 25 MHz 68040 mono cube) didn't have this problem
* Darrin B. Jewell <jewell@mit.edu> Mon May 25 07:53:05 1998
*/
state &= (DMACSR_COMPLETE | DMACSR_SUPDATE | DMACSR_ENABLE);
#else
state &= (DMACSR_BUSEXC | DMACSR_COMPLETE |
DMACSR_SUPDATE | DMACSR_ENABLE);
#endif
if (state) {
nextdma_print(nsc);
panic("DMA did not reset");
}
}
#endif
}
void
nextdma_reset(struct nextdma_softc *nsc)
{
int s;
struct nextdma_status *stat = &nsc->sc_stat;
s = spldma();
DPRINTF(("DMA reset\n"));
#if (defined(ND_DEBUG))
if (NEXTDMA_DEBUG > 1) nextdma_print(nsc);
#endif
nd_bsw4 (DD_CSR, DMACSR_CLRCOMPLETE | DMACSR_RESET);
if ((stat->nd_map) || (stat->nd_map_cont)) {
if (stat->nd_map_cont) {
DPRINTF(("DMA: resetting with non null continue map\n"));
if (nsc->sc_conf.nd_completed_cb)
(*nsc->sc_conf.nd_completed_cb)
(stat->nd_map_cont, nsc->sc_conf.nd_cb_arg);
stat->nd_map_cont = 0;
stat->nd_idx_cont = 0;
}
if (nsc->sc_conf.nd_shutdown_cb)
(*nsc->sc_conf.nd_shutdown_cb)(nsc->sc_conf.nd_cb_arg);
stat->nd_map = 0;
stat->nd_idx = 0;
}
splx(s);
}
/****************************************************************/
/* Call the completed and continue callbacks to try to fill
* in the dma continue buffers.
*/
void
nextdma_rotate(struct nextdma_softc *nsc)
{
struct nextdma_status *stat = &nsc->sc_stat;
NDTRACEIF (*ndtracep++ = 'r');
DPRINTF(("DMA nextdma_rotate()\n"));
/* Rotate the continue map into the current map */
stat->nd_map = stat->nd_map_cont;
stat->nd_idx = stat->nd_idx_cont;
if ((!stat->nd_map_cont) ||
((++stat->nd_idx_cont >= stat->nd_map_cont->dm_nsegs))) {
if (nsc->sc_conf.nd_continue_cb) {
stat->nd_map_cont = (*nsc->sc_conf.nd_continue_cb)
(nsc->sc_conf.nd_cb_arg);
if (stat->nd_map_cont) {
stat->nd_map_cont->dm_xfer_len = 0;
}
} else {
stat->nd_map_cont = 0;
}
stat->nd_idx_cont = 0;
}
#if defined(DIAGNOSTIC) && 0
if (stat->nd_map_cont) {
if (!DMA_BEGINALIGNED(stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_addr)) {
nextdma_print(nsc);
panic("DMA request unaligned at start");
}
if (!DMA_ENDALIGNED(stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_addr +
stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_len)) {
nextdma_print(nsc);
panic("DMA request unaligned at end");
}
}
#endif
}
void
nextdma_setup_curr_regs(struct nextdma_softc *nsc)
{
bus_addr_t dd_next;
bus_addr_t dd_limit;
bus_addr_t dd_saved_next;
bus_addr_t dd_saved_limit;
struct nextdma_status *stat = &nsc->sc_stat;
NDTRACEIF (*ndtracep++ = 'C');
DPRINTF(("DMA nextdma_setup_curr_regs()\n"));
if (stat->nd_map) {
dd_next = stat->nd_map->dm_segs[stat->nd_idx].ds_addr;
dd_limit = (stat->nd_map->dm_segs[stat->nd_idx].ds_addr +
stat->nd_map->dm_segs[stat->nd_idx].ds_len);
if (!turbo && nsc->sc_chan->nd_intr == NEXT_I_ENETX_DMA) {
dd_limit |= 0x80000000; /* Ethernet transmit needs secret magic */
dd_limit += 15;
}
} else {
dd_next = turbo ? 0 : 0xdeadbeef;
dd_limit = turbo ? 0 : 0xdeadbeef;
}
dd_saved_next = dd_next;
dd_saved_limit = dd_limit;
NDTRACEIF (if (stat->nd_map) {
sprintf (ndtracep, "%ld", stat->nd_map->dm_segs[stat->nd_idx].ds_len);
ndtracep += strlen (ndtracep);
});
if (!turbo && (nsc->sc_chan->nd_intr == NEXT_I_ENETX_DMA)) {
nd_bsw4 (DD_NEXT_INITBUF, dd_next);
} else {
nd_bsw4 (DD_NEXT, dd_next);
}
nd_bsw4 (DD_LIMIT, dd_limit);
if (!turbo) nd_bsw4 (DD_SAVED_NEXT, dd_saved_next);
if (!turbo) nd_bsw4 (DD_SAVED_LIMIT, dd_saved_limit);
#ifdef DIAGNOSTIC
if ((nd_bsr4 (DD_NEXT_INITBUF) != dd_next)
|| (nd_bsr4 (DD_NEXT) != dd_next)
|| (nd_bsr4 (DD_LIMIT) != dd_limit)
|| (!turbo && (nd_bsr4 (DD_SAVED_NEXT) != dd_saved_next))
|| (!turbo && (nd_bsr4 (DD_SAVED_LIMIT) != dd_saved_limit))
) {
nextdma_print(nsc);
panic("DMA failure writing to current regs");
}
#endif
}
void
nextdma_setup_cont_regs(struct nextdma_softc *nsc)
{
bus_addr_t dd_start;
bus_addr_t dd_stop;
bus_addr_t dd_saved_start;
bus_addr_t dd_saved_stop;
struct nextdma_status *stat = &nsc->sc_stat;
NDTRACEIF (*ndtracep++ = 'c');
DPRINTF(("DMA nextdma_setup_regs()\n"));
if (stat->nd_map_cont) {
dd_start = stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_addr;
dd_stop = (stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_addr +
stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_len);
if (!turbo && nsc->sc_chan->nd_intr == NEXT_I_ENETX_DMA) {
dd_stop |= 0x80000000; /* Ethernet transmit needs secret magic */
dd_stop += 15;
}
} else {
dd_start = turbo ? nd_bsr4 (DD_NEXT) : 0xdeadbee0;
dd_stop = turbo ? 0 : 0xdeadbee0;
}
dd_saved_start = dd_start;
dd_saved_stop = dd_stop;
NDTRACEIF (if (stat->nd_map_cont) {
sprintf (ndtracep, "%ld", stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_len);
ndtracep += strlen (ndtracep);
});
nd_bsw4 (DD_START, dd_start);
nd_bsw4 (DD_STOP, dd_stop);
if (!turbo) nd_bsw4 (DD_SAVED_START, dd_saved_start);
if (!turbo) nd_bsw4 (DD_SAVED_STOP, dd_saved_stop);
if (turbo && nsc->sc_chan->nd_intr == NEXT_I_ENETR_DMA)
nd_bsw4 (DD_STOP - 0x40, dd_start);
#ifdef DIAGNOSTIC
if ((nd_bsr4 (DD_START) != dd_start)
|| (dd_stop && (nd_bsr4 (DD_STOP) != dd_stop))
|| (!turbo && (nd_bsr4 (DD_SAVED_START) != dd_saved_start))
|| (!turbo && (nd_bsr4 (DD_SAVED_STOP) != dd_saved_stop))
) {
nextdma_print(nsc);
panic("DMA failure writing to continue regs");
}
#endif
}
/****************************************************************/
#if NESP > 0
static int
nextdma_esp_intr(void *arg)
{
/* @@@ This is bogus, we can't be certain of arg's type
* unless the interrupt is for us. For now we successfully
* cheat because DMA interrupts are the only things invoked
* at this interrupt level.
*/
struct nextdma_softc *nsc = arg;
int esp_dma_int(void *); /* XXX */
if (!INTR_OCCURRED(nsc->sc_chan->nd_intr))
return 0;
/* Handle dma interrupts */
return esp_dma_int (nsc->sc_conf.nd_cb_arg);
}
#endif
#if NXE > 0
static int
nextdma_enet_intr(void *arg)
{
/* @@@ This is bogus, we can't be certain of arg's type
* unless the interrupt is for us. For now we successfully
* cheat because DMA interrupts are the only things invoked
* at this interrupt level.
*/
struct nextdma_softc *nsc = arg;
unsigned int state;
bus_addr_t onext;
bus_addr_t olimit;
bus_addr_t slimit;
int result;
struct nextdma_status *stat = &nsc->sc_stat;
if (!INTR_OCCURRED(nsc->sc_chan->nd_intr))
return 0;
/* Handle dma interrupts */
NDTRACEIF (*ndtracep++ = 'D');
#ifdef ND_DEBUG
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("DMA interrupt ipl (%ld) intr(0x%s)\n",
NEXT_I_IPL(nsc->sc_chan->nd_intr), sbuf);
}
#endif
#ifdef DIAGNOSTIC
if (!stat->nd_map) {
nextdma_print(nsc);
panic("DMA missing current map in interrupt!");
}
#endif
state = nd_bsr4 (DD_CSR);
#if defined(ND_DEBUG)
nextdma_debug_savestate(nsc, state);
#endif
#ifdef DIAGNOSTIC
if (/* (state & DMACSR_READ) || */ !(state & DMACSR_COMPLETE)) {
char sbuf[256];
nextdma_print(nsc);
bitmask_snprintf(state, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: state 0x%s\n",sbuf);
panic("DMA complete not set in interrupt");
}
#endif
DPRINTF(("DMA: finishing xfer\n"));
onext = stat->nd_map->dm_segs[stat->nd_idx].ds_addr;
olimit = onext + stat->nd_map->dm_segs[stat->nd_idx].ds_len;
result = 0;
if (state & DMACSR_ENABLE) {
/* enable bit was set */
result |= 0x01;
}
if (state & DMACSR_SUPDATE) {
/* supdate bit was set */
result |= 0x02;
}
if (stat->nd_map_cont == NULL) {
KASSERT(stat->nd_idx+1 == stat->nd_map->dm_nsegs);
/* Expecting a shutdown, didn't SETSUPDATE last turn */
result |= 0x04;
}
if (state & DMACSR_BUSEXC) {
/* bus exception bit was set */
result |= 0x08;
}
switch (result) {
case 0x00: /* !BUSEXC && !expecting && !SUPDATE && !ENABLE */
case 0x08: /* BUSEXC && !expecting && !SUPDATE && !ENABLE */
if (turbo) {
volatile u_int *limit = (volatile u_int *)IIOV(0x2000050+0x4000);
slimit = *limit;
} else {
slimit = nd_bsr4 (DD_SAVED_LIMIT);
}
break;
case 0x01: /* !BUSEXC && !expecting && !SUPDATE && ENABLE */
case 0x09: /* BUSEXC && !expecting && !SUPDATE && ENABLE */
if (turbo) {
volatile u_int *limit = (volatile u_int *)IIOV(0x2000050+0x4000);
slimit = *limit;
} else {
slimit = nd_bsr4 (DD_SAVED_LIMIT);
}
break;
case 0x02: /* !BUSEXC && !expecting && SUPDATE && !ENABLE */
case 0x0a: /* BUSEXC && !expecting && SUPDATE && !ENABLE */
slimit = nd_bsr4 (DD_NEXT);
break;
case 0x04: /* !BUSEXC && expecting && !SUPDATE && !ENABLE */
case 0x0c: /* BUSEXC && expecting && !SUPDATE && !ENABLE */
slimit = nd_bsr4 (DD_LIMIT);
break;
default:
#ifdef DIAGNOSTIC
{
char sbuf[256];
printf("DMA: please send this output to port-next68k-maintainer@NetBSD.org:\n");
bitmask_snprintf(state, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: state 0x%s\n",sbuf);
nextdma_print(nsc);
panic("DMA: condition 0x%02x not yet documented to occur",result);
}
#endif
slimit = olimit;
break;
}
if (!turbo && nsc->sc_chan->nd_intr == NEXT_I_ENETX_DMA) {
slimit &= ~0x80000000;
slimit -= 15;
}
#ifdef DIAGNOSTIC
if ((state & DMACSR_READ))
DPRINTF (("limits: 0x%08lx <= 0x%08lx <= 0x%08lx %s\n", onext, slimit, olimit,
(state & DMACSR_READ) ? "read" : "write"));
if ((slimit < onext) || (slimit > olimit)) {
char sbuf[256];
bitmask_snprintf(state, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: state 0x%s\n",sbuf);
nextdma_print(nsc);
panic("DMA: Unexpected limit register (0x%08lx) in finish_xfer",slimit);
}
#endif
#ifdef DIAGNOSTIC
if ((state & DMACSR_ENABLE) && ((stat->nd_idx+1) != stat->nd_map->dm_nsegs)) {
if (slimit != olimit) {
char sbuf[256];
bitmask_snprintf(state, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: state 0x%s\n",sbuf);
nextdma_print(nsc);
panic("DMA: short limit register (0x%08lx) w/o finishing map.",slimit);
}
}
#endif
#if (defined(ND_DEBUG))
if (NEXTDMA_DEBUG > 2) nextdma_print(nsc);
#endif
stat->nd_map->dm_xfer_len += slimit-onext;
/* If we've reached the end of the current map, then inform
* that we've completed that map.
*/
if ((stat->nd_idx+1) == stat->nd_map->dm_nsegs) {
if (nsc->sc_conf.nd_completed_cb)
(*nsc->sc_conf.nd_completed_cb)
(stat->nd_map, nsc->sc_conf.nd_cb_arg);
} else {
KASSERT(stat->nd_map == stat->nd_map_cont);
KASSERT(stat->nd_idx+1 == stat->nd_idx_cont);
}
stat->nd_map = 0;
stat->nd_idx = 0;
#if (defined(ND_DEBUG))
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(state, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("CLNDMAP: dd->dd_csr = 0x%s\n", sbuf);
}
#endif
if (state & DMACSR_ENABLE) {
u_long dmadir; /* DMACSR_SETREAD or DMACSR_SETWRITE */
nextdma_rotate(nsc);
nextdma_setup_cont_regs(nsc);
if (state & DMACSR_READ) {
dmadir = DMACSR_SETREAD;
} else {
dmadir = DMACSR_SETWRITE;
}
if (stat->nd_map_cont == NULL) {
KASSERT(stat->nd_idx+1 == stat->nd_map->dm_nsegs);
nd_bsw4 (DD_CSR, DMACSR_CLRCOMPLETE | dmadir);
NDTRACEIF (*ndtracep++ = 'g');
} else {
nd_bsw4 (DD_CSR, DMACSR_CLRCOMPLETE | dmadir | DMACSR_SETSUPDATE);
NDTRACEIF (*ndtracep++ = 'G');
}
} else {
DPRINTF(("DMA: a shutdown occurred\n"));
nd_bsw4 (DD_CSR, DMACSR_CLRCOMPLETE | DMACSR_RESET);
/* Cleanup more incomplete transfers */
/* cleanup continue map */
if (stat->nd_map_cont) {
DPRINTF(("DMA: shutting down with non null continue map\n"));
if (nsc->sc_conf.nd_completed_cb)
(*nsc->sc_conf.nd_completed_cb)
(stat->nd_map_cont, nsc->sc_conf.nd_cb_arg);
stat->nd_map_cont = 0;
stat->nd_idx_cont = 0;
}
if (nsc->sc_conf.nd_shutdown_cb)
(*nsc->sc_conf.nd_shutdown_cb)(nsc->sc_conf.nd_cb_arg);
}
#ifdef ND_DEBUG
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("DMA exiting interrupt ipl (%ld) intr(0x%s)\n",
NEXT_I_IPL(nsc->sc_chan->nd_intr), sbuf);
}
#endif
return(1);
}
#endif
/*
* Check to see if dma has finished for a channel */
int
nextdma_finished(struct nextdma_softc *nsc)
{
int r;
int s;
struct nextdma_status *stat = &nsc->sc_stat;
s = spldma();
r = (stat->nd_map == NULL) && (stat->nd_map_cont == NULL);
splx(s);
return(r);
}
void
nextdma_start(struct nextdma_softc *nsc, u_long dmadir)
{
struct nextdma_status *stat = &nsc->sc_stat;
NDTRACEIF (*ndtracep++ = 'n');
#ifdef DIAGNOSTIC
if (!nextdma_finished(nsc)) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
panic("DMA trying to start before previous finished on intr(0x%s)", sbuf);
}
#endif
#ifdef ND_DEBUG
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("DMA start (%ld) intr(0x%s)\n",
NEXT_I_IPL(nsc->sc_chan->nd_intr), sbuf);
}
#endif
#ifdef DIAGNOSTIC
if (stat->nd_map) {
nextdma_print(nsc);
panic("DMA: nextdma_start() with non null map");
}
if (stat->nd_map_cont) {
nextdma_print(nsc);
panic("DMA: nextdma_start() with non null continue map");
}
#endif
#ifdef DIAGNOSTIC
if ((dmadir != DMACSR_SETREAD) && (dmadir != DMACSR_SETWRITE)) {
panic("DMA: nextdma_start(), dmadir arg must be DMACSR_SETREAD or DMACSR_SETWRITE");
}
#endif
#if defined(ND_DEBUG)
nextdma_debug_initstate(nsc);
#endif
/* preload both the current and the continue maps */
nextdma_rotate(nsc);
#ifdef DIAGNOSTIC
if (!stat->nd_map_cont) {
panic("No map available in nextdma_start()");
}
#endif
nextdma_rotate(nsc);
#ifdef ND_DEBUG
if (NEXTDMA_DEBUG) {
char sbuf[256];
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("DMA initiating DMA %s of %d segments on intr(0x%s)\n",
(dmadir == DMACSR_SETREAD ? "read" : "write"), stat->nd_map->dm_nsegs, sbuf);
}
#endif
nd_bsw4 (DD_CSR, (turbo ? DMACSR_INITBUFTURBO : DMACSR_INITBUF) |
DMACSR_RESET | dmadir);
nd_bsw4 (DD_CSR, 0);
nextdma_setup_curr_regs(nsc);
nextdma_setup_cont_regs(nsc);
#if (defined(ND_DEBUG))
if (NEXTDMA_DEBUG > 2) nextdma_print(nsc);
#endif
if (stat->nd_map_cont == NULL) {
nd_bsw4 (DD_CSR, DMACSR_SETENABLE | dmadir);
} else {
nd_bsw4 (DD_CSR, DMACSR_SETSUPDATE | DMACSR_SETENABLE | dmadir);
}
}
/* This routine is used for debugging */
void
nextdma_print(struct nextdma_softc *nsc)
{
u_long dd_csr;
u_long dd_next;
u_long dd_next_initbuf;
u_long dd_limit;
u_long dd_start;
u_long dd_stop;
u_long dd_saved_next;
u_long dd_saved_limit;
u_long dd_saved_start;
u_long dd_saved_stop;
char sbuf[256];
struct nextdma_status *stat = &nsc->sc_stat;
/* Read all of the registers before we print anything out,
* in case something changes
*/
dd_csr = nd_bsr4 (DD_CSR);
dd_next = nd_bsr4 (DD_NEXT);
dd_next_initbuf = nd_bsr4 (DD_NEXT_INITBUF);
dd_limit = nd_bsr4 (DD_LIMIT);
dd_start = nd_bsr4 (DD_START);
dd_stop = nd_bsr4 (DD_STOP);
dd_saved_next = nd_bsr4 (DD_SAVED_NEXT);
dd_saved_limit = nd_bsr4 (DD_SAVED_LIMIT);
dd_saved_start = nd_bsr4 (DD_SAVED_START);
dd_saved_stop = nd_bsr4 (DD_SAVED_STOP);
bitmask_snprintf((*(volatile u_long *)IIOV(NEXT_P_INTRSTAT)),
NEXT_INTR_BITS, sbuf, sizeof(sbuf));
printf("NDMAP: *intrstat = 0x%s\n", sbuf);
bitmask_snprintf((*(volatile u_long *)IIOV(NEXT_P_INTRMASK)),
NEXT_INTR_BITS, sbuf, sizeof(sbuf));
printf("NDMAP: *intrmask = 0x%s\n", sbuf);
/* NDMAP is Next DMA Print (really!) */
if (stat->nd_map) {
int i;
printf("NDMAP: nd_map->dm_mapsize = %ld\n",
stat->nd_map->dm_mapsize);
printf("NDMAP: nd_map->dm_nsegs = %d\n",
stat->nd_map->dm_nsegs);
printf("NDMAP: nd_map->dm_xfer_len = %ld\n",
stat->nd_map->dm_xfer_len);
printf("NDMAP: nd_map->dm_segs[%d].ds_addr = 0x%08lx\n",
stat->nd_idx, stat->nd_map->dm_segs[stat->nd_idx].ds_addr);
printf("NDMAP: nd_map->dm_segs[%d].ds_len = %ld\n",
stat->nd_idx, stat->nd_map->dm_segs[stat->nd_idx].ds_len);
printf("NDMAP: Entire map;\n");
for(i=0;i<stat->nd_map->dm_nsegs;i++) {
printf("NDMAP: nd_map->dm_segs[%d].ds_addr = 0x%08lx\n",
i,stat->nd_map->dm_segs[i].ds_addr);
printf("NDMAP: nd_map->dm_segs[%d].ds_len = %ld\n",
i,stat->nd_map->dm_segs[i].ds_len);
}
} else {
printf("NDMAP: nd_map = NULL\n");
}
if (stat->nd_map_cont) {
printf("NDMAP: nd_map_cont->dm_mapsize = %ld\n",
stat->nd_map_cont->dm_mapsize);
printf("NDMAP: nd_map_cont->dm_nsegs = %d\n",
stat->nd_map_cont->dm_nsegs);
printf("NDMAP: nd_map_cont->dm_xfer_len = %ld\n",
stat->nd_map_cont->dm_xfer_len);
printf("NDMAP: nd_map_cont->dm_segs[%d].ds_addr = 0x%08lx\n",
stat->nd_idx_cont,stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_addr);
printf("NDMAP: nd_map_cont->dm_segs[%d].ds_len = %ld\n",
stat->nd_idx_cont,stat->nd_map_cont->dm_segs[stat->nd_idx_cont].ds_len);
if (stat->nd_map_cont != stat->nd_map) {
int i;
printf("NDMAP: Entire map;\n");
for(i=0;i<stat->nd_map_cont->dm_nsegs;i++) {
printf("NDMAP: nd_map_cont->dm_segs[%d].ds_addr = 0x%08lx\n",
i,stat->nd_map_cont->dm_segs[i].ds_addr);
printf("NDMAP: nd_map_cont->dm_segs[%d].ds_len = %ld\n",
i,stat->nd_map_cont->dm_segs[i].ds_len);
}
}
} else {
printf("NDMAP: nd_map_cont = NULL\n");
}
bitmask_snprintf(dd_csr, DMACSR_BITS, sbuf, sizeof(sbuf));
printf("NDMAP: dd->dd_csr = 0x%s\n", sbuf);
printf("NDMAP: dd->dd_saved_next = 0x%08lx\n", dd_saved_next);
printf("NDMAP: dd->dd_saved_limit = 0x%08lx\n", dd_saved_limit);
printf("NDMAP: dd->dd_saved_start = 0x%08lx\n", dd_saved_start);
printf("NDMAP: dd->dd_saved_stop = 0x%08lx\n", dd_saved_stop);
printf("NDMAP: dd->dd_next = 0x%08lx\n", dd_next);
printf("NDMAP: dd->dd_next_initbuf = 0x%08lx\n", dd_next_initbuf);
printf("NDMAP: dd->dd_limit = 0x%08lx\n", dd_limit);
printf("NDMAP: dd->dd_start = 0x%08lx\n", dd_start);
printf("NDMAP: dd->dd_stop = 0x%08lx\n", dd_stop);
bitmask_snprintf(NEXT_I_BIT(nsc->sc_chan->nd_intr), NEXT_INTR_BITS,
sbuf, sizeof(sbuf));
printf("NDMAP: interrupt ipl (%ld) intr(0x%s)\n",
NEXT_I_IPL(nsc->sc_chan->nd_intr), sbuf);
}
#if defined(ND_DEBUG)
void
nextdma_debug_initstate(struct nextdma_softc *nsc)
{
switch(nsc->sc_chan->nd_intr) {
case NEXT_I_ENETR_DMA:
memset(nextdma_debug_enetr_state,0,sizeof(nextdma_debug_enetr_state));
break;
case NEXT_I_SCSI_DMA:
memset(nextdma_debug_scsi_state,0,sizeof(nextdma_debug_scsi_state));
break;
}
}
void
nextdma_debug_savestate(struct nextdma_softc *nsc, unsigned int state)
{
switch(nsc->sc_chan->nd_intr) {
case NEXT_I_ENETR_DMA:
nextdma_debug_enetr_state[nextdma_debug_enetr_idx++] = state;
nextdma_debug_enetr_idx %= (sizeof(nextdma_debug_enetr_state)/sizeof(unsigned int));
break;
case NEXT_I_SCSI_DMA:
nextdma_debug_scsi_state[nextdma_debug_scsi_idx++] = state;
nextdma_debug_scsi_idx %= (sizeof(nextdma_debug_scsi_state)/sizeof(unsigned int));
break;
}
}
void
nextdma_debug_enetr_dumpstate(void)
{
int i;
int s;
s = spldma();
i = nextdma_debug_enetr_idx;
do {
char sbuf[256];
if (nextdma_debug_enetr_state[i]) {
bitmask_snprintf(nextdma_debug_enetr_state[i], DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: 0x%02x state 0x%s\n",i,sbuf);
}
i++;
i %= (sizeof(nextdma_debug_enetr_state)/sizeof(unsigned int));
} while (i != nextdma_debug_enetr_idx);
splx(s);
}
void
nextdma_debug_scsi_dumpstate(void)
{
int i;
int s;
s = spldma();
i = nextdma_debug_scsi_idx;
do {
char sbuf[256];
if (nextdma_debug_scsi_state[i]) {
bitmask_snprintf(nextdma_debug_scsi_state[i], DMACSR_BITS, sbuf, sizeof(sbuf));
printf("DMA: 0x%02x state 0x%s\n",i,sbuf);
}
i++;
i %= (sizeof(nextdma_debug_scsi_state)/sizeof(unsigned int));
} while (i != nextdma_debug_scsi_idx);
splx(s);
}
#endif