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[src/trunk]: src/sys/arch/arm/allwinner use bus_dma instead of pmap_extract t...
details: https://anonhg.NetBSD.org/src/rev/26ae5d7d704d
branches: trunk
changeset: 332084:26ae5d7d704d
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Sat Sep 06 14:53:41 2014 +0000
description:
use bus_dma instead of pmap_extract to get phys addr of audio buffer
diffstat:
sys/arch/arm/allwinner/awin_ac.c | 151 ++++++++++++++++++++++++++++++++++----
1 files changed, 135 insertions(+), 16 deletions(-)
diffs (260 lines):
diff -r 4e2f7a85e4a3 -r 26ae5d7d704d sys/arch/arm/allwinner/awin_ac.c
--- a/sys/arch/arm/allwinner/awin_ac.c Sat Sep 06 13:00:33 2014 +0000
+++ b/sys/arch/arm/allwinner/awin_ac.c Sat Sep 06 14:53:41 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: awin_ac.c,v 1.5 2014/09/06 13:00:33 jmcneill Exp $ */
+/* $NetBSD: awin_ac.c,v 1.6 2014/09/06 14:53:41 jmcneill Exp $ */
/*-
* Copyright (c) 2014 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -30,14 +30,14 @@
#include "opt_ddb.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: awin_ac.c,v 1.5 2014/09/06 13:00:33 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: awin_ac.c,v 1.6 2014/09/06 14:53:41 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/systm.h>
-#include <uvm/uvm_extern.h>
+#include <sys/kmem.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
@@ -122,12 +122,24 @@
#define AC_DAC_CAL 0x38
#define AC_MIC_PHONE_CAL 0x3c
+struct awinac_dma {
+ LIST_ENTRY(awinac_dma) dma_list;
+ bus_dmamap_t dma_map;
+ void *dma_addr;
+ size_t dma_size;
+ bus_dma_segment_t dma_segs[1];
+ int dma_nsegs;
+};
+
struct awinac_softc {
device_t sc_dev;
device_t sc_audiodev;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
+ bus_dma_tag_t sc_dmat;
+
+ LIST_HEAD(, awinac_dma) sc_dmalist;
kmutex_t sc_lock;
kmutex_t sc_intr_lock;
@@ -142,9 +154,9 @@
struct awin_dma_channel *sc_pdma;
void (*sc_pint)(void *);
void *sc_pintarg;
- uint8_t *sc_pstart;
- uint8_t *sc_pend;
- uint8_t *sc_pcur;
+ bus_addr_t sc_pstart;
+ bus_addr_t sc_pend;
+ bus_addr_t sc_pcur;
int sc_pblksize;
struct awin_gpio_pindata sc_pactrl_gpio;
@@ -157,6 +169,9 @@
static void awinac_childdet(device_t, device_t);
static void awinac_init(struct awinac_softc *);
+static int awinac_allocdma(struct awinac_softc *, size_t, size_t,
+ struct awinac_dma *);
+static void awinac_freedma(struct awinac_softc *, struct awinac_dma *);
static void awinac_pint(void *);
static int awinac_play(struct awinac_softc *);
@@ -180,6 +195,8 @@
static int awinac_set_port(void *, mixer_ctrl_t *);
static int awinac_get_port(void *, mixer_ctrl_t *);
static int awinac_query_devinfo(void *, mixer_devinfo_t *);
+static void * awinac_allocm(void *, int, size_t);
+static void awinac_freem(void *, void *, size_t);
static int awinac_getdev(void *, struct audio_device *);
static int awinac_get_props(void *);
static int awinac_round_blocksize(void *, int, int,
@@ -202,6 +219,8 @@
.commit_settings = awinac_commit_settings,
.halt_output = awinac_halt_output,
.halt_input = awinac_halt_input,
+ .allocm = awinac_allocm,
+ .freem = awinac_freem,
.getdev = awinac_getdev,
.set_port = awinac_set_port,
.get_port = awinac_get_port,
@@ -259,6 +278,8 @@
sc->sc_dev = self;
sc->sc_bst = aio->aio_core_bst;
+ sc->sc_dmat = aio->aio_coherent_dmat;
+ LIST_INIT(&sc->sc_dmalist);
bus_space_subregion(sc->sc_bst, aio->aio_core_bsh,
loc->loc_offset, loc->loc_size, &sc->sc_bsh);
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
@@ -361,6 +382,54 @@
AC_WRITE(sc, AC_DAC_FIFOS, AC_READ(sc, AC_DAC_FIFOS));
}
+static int
+awinac_allocdma(struct awinac_softc *sc, size_t size, size_t align,
+ struct awinac_dma *dma)
+{
+ int error;
+
+ dma->dma_size = size;
+ error = bus_dmamem_alloc(sc->sc_dmat, dma->dma_size, align, 0,
+ dma->dma_segs, 1, &dma->dma_nsegs, BUS_DMA_WAITOK);
+ if (error)
+ return error;
+
+ error = bus_dmamem_map(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs,
+ dma->dma_size, &dma->dma_addr, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
+ if (error)
+ goto free;
+
+ error = bus_dmamap_create(sc->sc_dmat, dma->dma_size, dma->dma_nsegs,
+ dma->dma_size, 0, BUS_DMA_WAITOK, &dma->dma_map);
+ if (error)
+ goto unmap;
+
+ error = bus_dmamap_load(sc->sc_dmat, dma->dma_map, dma->dma_addr,
+ dma->dma_size, NULL, BUS_DMA_WAITOK);
+ if (error)
+ goto destroy;
+
+ return 0;
+
+destroy:
+ bus_dmamap_destroy(sc->sc_dmat, dma->dma_map);
+unmap:
+ bus_dmamem_unmap(sc->sc_dmat, dma->dma_addr, dma->dma_size);
+free:
+ bus_dmamem_free(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs);
+
+ return error;
+}
+
+static void
+awinac_freedma(struct awinac_softc *sc, struct awinac_dma *dma)
+{
+ bus_dmamap_unload(sc->sc_dmat, dma->dma_map);
+ bus_dmamap_destroy(sc->sc_dmat, dma->dma_map);
+ bus_dmamem_unmap(sc->sc_dmat, dma->dma_addr, dma->dma_size);
+ bus_dmamem_free(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs);
+}
+
static void
awinac_pint(void *priv)
{
@@ -380,17 +449,10 @@
static int
awinac_play(struct awinac_softc *sc)
{
- paddr_t physsrc;
int error;
- if (!pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_pcur, &physsrc)) {
- device_printf(sc->sc_dev, "pmap_extract failed for %p\n",
- sc->sc_pcur);
- return ENXIO;
- }
-
error = awin_dma_transfer(sc->sc_pdma,
- physsrc, AWIN_CORE_PBASE + AWIN_AC_OFFSET + AC_DAC_TXDATA,
+ sc->sc_pcur, AWIN_CORE_PBASE + AWIN_AC_OFFSET + AC_DAC_TXDATA,
sc->sc_pblksize);
if (error) {
device_printf(sc->sc_dev, "failed to transfer DMA; error %d\n",
@@ -603,6 +665,46 @@
return ENXIO;
}
+static void *
+awinac_allocm(void *priv, int dir, size_t size)
+{
+ struct awinac_softc *sc = priv;
+ struct awinac_dma *dma;
+ int error;
+
+ dma = kmem_alloc(sizeof(*dma), KM_SLEEP);
+ if (dma == NULL)
+ return NULL;
+
+ error = awinac_allocdma(sc, size, 16, dma);
+ if (error) {
+ kmem_free(dma, sizeof(*dma));
+ device_printf(sc->sc_dev, "couldn't allocate DMA memory (%d)\n",
+ error);
+ return NULL;
+ }
+
+ LIST_INSERT_HEAD(&sc->sc_dmalist, dma, dma_list);
+
+ return dma->dma_addr;
+}
+
+static void
+awinac_freem(void *priv, void *addr, size_t size)
+{
+ struct awinac_softc *sc = priv;
+ struct awinac_dma *dma;
+
+ LIST_FOREACH(dma, &sc->sc_dmalist, dma_list) {
+ if (dma->dma_addr == addr) {
+ awinac_freedma(sc, dma);
+ LIST_REMOVE(dma, dma_list);
+ kmem_free(dma, sizeof(*dma));
+ break;
+ }
+ }
+}
+
static int
awinac_getdev(void *priv, struct audio_device *audiodev)
{
@@ -636,9 +738,26 @@
void (*intr)(void *), void *intrarg, const audio_params_t *params)
{
struct awinac_softc *sc = priv;
+ struct awinac_dma *dma;
+ bus_addr_t pstart;
+ bus_size_t psize;
uint32_t val, dmacfg;
int error;
+ pstart = 0;
+ psize = (uintptr_t)end - (uintptr_t)start;
+
+ LIST_FOREACH(dma, &sc->sc_dmalist, dma_list) {
+ if (dma->dma_addr == start) {
+ pstart = dma->dma_map->dm_segs[0].ds_addr;
+ break;
+ }
+ }
+ if (pstart == 0) {
+ device_printf(sc->sc_dev, "bad addr %p\n", start);
+ return EINVAL;
+ }
+
val = AC_READ(sc, AC_DAC_FIFOC);
val |= DAC_FIFOC_FIFO_FLUSH;
AC_WRITE(sc, AC_DAC_FIFOC, val);
@@ -651,8 +770,8 @@
sc->sc_pint = intr;
sc->sc_pintarg = intrarg;
- sc->sc_pstart = sc->sc_pcur = start;
- sc->sc_pend = end;
+ sc->sc_pstart = sc->sc_pcur = pstart;
+ sc->sc_pend = sc->sc_pstart + psize;
sc->sc_pblksize = blksize;
if (sc->sc_has_pactrl_gpio)
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