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freebsd-dev/sys/arm/allwinner/a31_dmac.c
Conrad Meyer e2e050c8ef Extract eventfilter declarations to sys/_eventfilter.h 
This allows replacing "sys/eventfilter.h" includes with "sys/_eventfilter.h"
in other header files (e.g., sys/{bus,conf,cpu}.h) and reduces header
pollution substantially.

EVENTHANDLER_DECLARE and EVENTHANDLER_LIST_DECLAREs were moved out of .c
files into appropriate headers (e.g., sys/proc.h, powernv/opal.h).

As a side effect of reduced header pollution, many .c files and headers no
longer contain needed definitions.  The remainder of the patch addresses
adding appropriate includes to fix those files.

LOCK_DEBUG and LOCK_FILE_LINE_ARG are moved to sys/_lock.h, as required by
sys/mutex.h since r326106 (but silently protected by header pollution prior
to this change).

No functional change (intended).  Of course, any out of tree modules that
relied on header pollution for sys/eventhandler.h, sys/lock.h, or
sys/mutex.h inclusion need to be fixed.  __FreeBSD_version has been bumped.
2019-05-20 00:38:23 +00:00

560 lines
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/*-
* Copyright (c) 2016 Jared D. McNeill <jmcneill@invisible.ca>
* 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.
*
* 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.
*
*/
/*
* Allwinner DMA controller
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/condvar.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/endian.h>
#include <machine/bus.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm/allwinner/a10_dmac.h>
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include "sunxi_dma_if.h"
#define DMA_IRQ_EN_REG0 0x00
#define DMA_IRQ_EN_REG1 0x04
#define DMA_IRQ_EN_REG(ch) (DMA_IRQ_EN_REG0 + ((ch) / 8) * 4)
#define DMA_PKG_IRQ_EN(ch) (1 << (((ch) % 8) * 4 + 1))
#define DMA_PKG_IRQ_MASK 0x2222222222222222ULL
#define DMA_IRQ_PEND_REG0 0x10
#define DMA_IRQ_PEND_REG1 0x14
#define DMA_IRQ_PEND_REG(ch) (DMA_IRQ_PEND_REG0 + ((ch) / 8) * 4)
#define DMA_STA_REG 0x30
#define DMA_EN_REG(n) (0x100 + (n) * 0x40 + 0x00)
#define DMA_EN (1 << 0)
#define DMA_PAU_REG(n) (0x100 + (n) * 0x40 + 0x04)
#define DMA_STAR_ADDR_REG(n) (0x100 + (n) * 0x40 + 0x08)
#define DMA_CFG_REG(n) (0x100 + (n) * 0x40 + 0x0c)
#define DMA_DEST_DATA_WIDTH (0x3 << 25)
#define DMA_DEST_DATA_WIDTH_SHIFT 25
#define DMA_DEST_BST_LEN (0x3 << 22)
#define DMA_DEST_BST_LEN_SHIFT 22
#define DMA_DEST_ADDR_MODE (0x1 << 21)
#define DMA_DEST_ADDR_MODE_SHIFT 21
#define DMA_DEST_DRQ_TYPE (0x1f << 16)
#define DMA_DEST_DRQ_TYPE_SHIFT 16
#define DMA_SRC_DATA_WIDTH (0x3 << 9)
#define DMA_SRC_DATA_WIDTH_SHIFT 9
#define DMA_SRC_BST_LEN (0x3 << 6)
#define DMA_SRC_BST_LEN_SHIFT 6
#define DMA_SRC_ADDR_MODE (0x1 << 5)
#define DMA_SRC_ADDR_MODE_SHIFT 5
#define DMA_SRC_DRQ_TYPE (0x1f << 0)
#define DMA_SRC_DRQ_TYPE_SHIFT 0
#define DMA_DATA_WIDTH_8BIT 0
#define DMA_DATA_WIDTH_16BIT 1
#define DMA_DATA_WIDTH_32BIT 2
#define DMA_DATA_WIDTH_64BIT 3
#define DMA_ADDR_MODE_LINEAR 0
#define DMA_ADDR_MODE_IO 1
#define DMA_BST_LEN_1 0
#define DMA_BST_LEN_4 1
#define DMA_BST_LEN_8 2
#define DMA_BST_LEN_16 3
#define DMA_CUR_SRC_REG(n) (0x100 + (n) * 0x40 + 0x10)
#define DMA_CUR_DEST_REG(n) (0x100 + (n) * 0x40 + 0x14)
#define DMA_BCNT_LEFT_REG(n) (0x100 + (n) * 0x40 + 0x18)
#define DMA_PARA_REG(n) (0x100 + (n) * 0x40 + 0x1c)
#define WAIT_CYC (0xff << 0)
#define WAIT_CYC_SHIFT 0
struct a31dmac_desc {
uint32_t config;
uint32_t srcaddr;
uint32_t dstaddr;
uint32_t bcnt;
uint32_t para;
uint32_t next;
#define DMA_NULL 0xfffff800
};
#define DESC_ALIGN 4
#define DESC_SIZE sizeof(struct a31dmac_desc)
struct a31dmac_config {
u_int nchans;
};
static const struct a31dmac_config a31_config = { .nchans = 16 };
static const struct a31dmac_config h3_config = { .nchans = 12 };
static const struct a31dmac_config a83t_config = { .nchans = 8 };
static const struct a31dmac_config a64_config = { .nchans = 8 };
static struct ofw_compat_data compat_data[] = {
{ "allwinner,sun6i-a31-dma", (uintptr_t)&a31_config },
{ "allwinner,sun8i-a83t-dma", (uintptr_t)&a83t_config },
{ "allwinner,sun8i-h3-dma", (uintptr_t)&h3_config },
{ "allwinner,sun50i-a64-dma", (uintptr_t)&a64_config },
{ NULL, (uintptr_t)NULL }
};
struct a31dmac_softc;
struct a31dmac_channel {
struct a31dmac_softc * sc;
uint8_t index;
void (*callback)(void *);
void * callbackarg;
bus_dmamap_t dmamap;
struct a31dmac_desc *desc;
bus_addr_t physaddr;
};
struct a31dmac_softc {
struct resource * res[2];
struct mtx mtx;
void * ih;
bus_dma_tag_t dmat;
u_int nchans;
struct a31dmac_channel * chans;
};
static struct resource_spec a31dmac_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_IRQ, 0, RF_ACTIVE },
{ -1, 0 }
};
#define DMA_READ(sc, reg) bus_read_4((sc)->res[0], (reg))
#define DMA_WRITE(sc, reg, val) bus_write_4((sc)->res[0], (reg), (val))
static void a31dmac_intr(void *);
static void a31dmac_dmamap_cb(void *, bus_dma_segment_t *, int, int);
static int
a31dmac_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
return (ENXIO);
device_set_desc(dev, "Allwinner DMA controller");
return (BUS_PROBE_DEFAULT);
}
static int
a31dmac_attach(device_t dev)
{
struct a31dmac_softc *sc;
struct a31dmac_config *conf;
u_int index;
hwreset_t rst;
clk_t clk;
int error;
sc = device_get_softc(dev);
conf = (void *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
clk = NULL;
rst = NULL;
if (bus_alloc_resources(dev, a31dmac_spec, sc->res)) {
device_printf(dev, "cannot allocate resources for device\n");
return (ENXIO);
}
mtx_init(&sc->mtx, "a31 dmac", NULL, MTX_SPIN);
/* Clock and reset setup */
if (clk_get_by_ofw_index(dev, 0, 0, &clk) != 0) {
device_printf(dev, "cannot get clock\n");
goto fail;
}
if (clk_enable(clk) != 0) {
device_printf(dev, "cannot enable clock\n");
goto fail;
}
if (hwreset_get_by_ofw_idx(dev, 0, 0, &rst) != 0) {
device_printf(dev, "cannot get hwreset\n");
goto fail;
}
if (hwreset_deassert(rst) != 0) {
device_printf(dev, "cannot de-assert reset\n");
goto fail;
}
/* Descriptor DMA */
error = bus_dma_tag_create(
bus_get_dma_tag(dev), /* Parent tag */
DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
DESC_SIZE, 1, /* maxsize, nsegs */
DESC_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->dmat);
if (error != 0) {
device_printf(dev, "cannot create dma tag\n");
goto fail;
}
/* Disable all interrupts and clear pending status */
DMA_WRITE(sc, DMA_IRQ_EN_REG0, 0);
DMA_WRITE(sc, DMA_IRQ_EN_REG1, 0);
DMA_WRITE(sc, DMA_IRQ_PEND_REG0, ~0);
DMA_WRITE(sc, DMA_IRQ_PEND_REG1, ~0);
/* Initialize channels */
sc->nchans = conf->nchans;
sc->chans = malloc(sizeof(*sc->chans) * sc->nchans, M_DEVBUF,
M_WAITOK | M_ZERO);
for (index = 0; index < sc->nchans; index++) {
sc->chans[index].sc = sc;
sc->chans[index].index = index;
sc->chans[index].callback = NULL;
sc->chans[index].callbackarg = NULL;
error = bus_dmamem_alloc(sc->dmat,
(void **)&sc->chans[index].desc,
BUS_DMA_WAITOK | BUS_DMA_COHERENT,
&sc->chans[index].dmamap);
if (error != 0) {
device_printf(dev, "cannot allocate dma mem\n");
goto fail;
}
error = bus_dmamap_load(sc->dmat, sc->chans[index].dmamap,
sc->chans[index].desc, sizeof(*sc->chans[index].desc),
a31dmac_dmamap_cb, &sc->chans[index], BUS_DMA_WAITOK);
if (error != 0) {
device_printf(dev, "cannot load dma map\n");
goto fail;
}
DMA_WRITE(sc, DMA_EN_REG(index), 0);
}
error = bus_setup_intr(dev, sc->res[1], INTR_MPSAFE | INTR_TYPE_MISC,
NULL, a31dmac_intr, sc, &sc->ih);
if (error != 0) {
device_printf(dev, "could not setup interrupt handler\n");
bus_release_resources(dev, a31dmac_spec, sc->res);
mtx_destroy(&sc->mtx);
return (ENXIO);
}
OF_device_register_xref(OF_xref_from_node(ofw_bus_get_node(dev)), dev);
return (0);
fail:
for (index = 0; index < sc->nchans; index++)
if (sc->chans[index].desc != NULL) {
bus_dmamap_unload(sc->dmat, sc->chans[index].dmamap);
bus_dmamem_free(sc->dmat, sc->chans[index].desc,
sc->chans[index].dmamap);
}
if (sc->chans != NULL)
free(sc->chans, M_DEVBUF);
if (sc->ih != NULL)
bus_teardown_intr(dev, sc->res[1], sc->ih);
if (rst != NULL)
hwreset_release(rst);
if (clk != NULL)
clk_release(clk);
bus_release_resources(dev, a31dmac_spec, sc->res);
return (ENXIO);
}
static void
a31dmac_dmamap_cb(void *priv, bus_dma_segment_t *segs, int nsegs, int error)
{
struct a31dmac_channel *ch;
if (error != 0)
return;
ch = priv;
ch->physaddr = segs[0].ds_addr;
}
static void
a31dmac_intr(void *priv)
{
struct a31dmac_softc *sc;
uint32_t pend0, pend1, bit;
uint64_t pend, mask;
u_int index;
sc = priv;
pend0 = DMA_READ(sc, DMA_IRQ_PEND_REG0);
pend1 = sc->nchans > 8 ? DMA_READ(sc, DMA_IRQ_PEND_REG1) : 0;
if (pend0 == 0 && pend1 == 0)
return;
if (pend0 != 0)
DMA_WRITE(sc, DMA_IRQ_PEND_REG0, pend0);
if (pend1 != 0)
DMA_WRITE(sc, DMA_IRQ_PEND_REG1, pend1);
pend = pend0 | ((uint64_t)pend1 << 32);
while ((bit = ffsll(pend & DMA_PKG_IRQ_MASK)) != 0) {
mask = (1U << (bit - 1));
pend &= ~mask;
index = (bit - 1) / 4;
if (index >= sc->nchans)
continue;
if (sc->chans[index].callback == NULL)
continue;
sc->chans[index].callback(sc->chans[index].callbackarg);
}
}
static int
a31dmac_set_config(device_t dev, void *priv, const struct sunxi_dma_config *cfg)
{
struct a31dmac_channel *ch;
uint32_t config, para;
unsigned int dst_dw, dst_bl, dst_wc, dst_am;
unsigned int src_dw, src_bl, src_wc, src_am;
ch = priv;
switch (cfg->dst_width) {
case 8:
dst_dw = DMA_DATA_WIDTH_8BIT;
break;
case 16:
dst_dw = DMA_DATA_WIDTH_16BIT;
break;
case 32:
dst_dw = DMA_DATA_WIDTH_32BIT;
break;
case 64:
dst_dw = DMA_DATA_WIDTH_64BIT;
break;
default:
return (EINVAL);
}
switch (cfg->dst_burst_len) {
case 1:
dst_bl = DMA_BST_LEN_1;
break;
case 4:
dst_bl = DMA_BST_LEN_4;
break;
case 8:
dst_bl = DMA_BST_LEN_8;
break;
case 16:
dst_bl = DMA_BST_LEN_16;
break;
default:
return (EINVAL);
}
switch (cfg->src_width) {
case 8:
src_dw = DMA_DATA_WIDTH_8BIT;
break;
case 16:
src_dw = DMA_DATA_WIDTH_16BIT;
break;
case 32:
src_dw = DMA_DATA_WIDTH_32BIT;
break;
case 64:
src_dw = DMA_DATA_WIDTH_64BIT;
default:
return (EINVAL);
}
switch (cfg->src_burst_len) {
case 1:
src_bl = DMA_BST_LEN_1;
break;
case 4:
src_bl = DMA_BST_LEN_4;
break;
case 8:
src_bl = DMA_BST_LEN_8;
break;
case 16:
src_bl = DMA_BST_LEN_16;
break;
default:
return (EINVAL);
}
dst_am = cfg->dst_noincr ? DMA_ADDR_MODE_IO : DMA_ADDR_MODE_LINEAR;
src_am = cfg->src_noincr ? DMA_ADDR_MODE_IO : DMA_ADDR_MODE_LINEAR;
dst_wc = cfg->dst_wait_cyc;
src_wc = cfg->src_wait_cyc;
if (dst_wc != src_wc)
return (EINVAL);
config = (dst_dw << DMA_DEST_DATA_WIDTH_SHIFT) |
(dst_bl << DMA_DEST_BST_LEN_SHIFT) |
(dst_am << DMA_DEST_ADDR_MODE_SHIFT) |
(cfg->dst_drqtype << DMA_DEST_DRQ_TYPE_SHIFT) |
(src_dw << DMA_SRC_DATA_WIDTH_SHIFT) |
(src_bl << DMA_SRC_BST_LEN_SHIFT) |
(src_am << DMA_SRC_ADDR_MODE_SHIFT) |
(cfg->src_drqtype << DMA_SRC_DRQ_TYPE_SHIFT);
para = (dst_wc << WAIT_CYC_SHIFT);
ch->desc->config = htole32(config);
ch->desc->para = htole32(para);
return (0);
}
static void *
a31dmac_alloc(device_t dev, bool dedicated, void (*cb)(void *), void *cbarg)
{
struct a31dmac_softc *sc;
struct a31dmac_channel *ch;
uint32_t irqen;
u_int index;
sc = device_get_softc(dev);
ch = NULL;
mtx_lock_spin(&sc->mtx);
for (index = 0; index < sc->nchans; index++) {
if (sc->chans[index].callback == NULL) {
ch = &sc->chans[index];
ch->callback = cb;
ch->callbackarg = cbarg;
irqen = DMA_READ(sc, DMA_IRQ_EN_REG(index));
irqen |= DMA_PKG_IRQ_EN(index);
DMA_WRITE(sc, DMA_IRQ_EN_REG(index), irqen);
break;
}
}
mtx_unlock_spin(&sc->mtx);
return (ch);
}
static void
a31dmac_free(device_t dev, void *priv)
{
struct a31dmac_channel *ch;
struct a31dmac_softc *sc;
uint32_t irqen;
u_int index;
ch = priv;
sc = ch->sc;
index = ch->index;
mtx_lock_spin(&sc->mtx);
irqen = DMA_READ(sc, DMA_IRQ_EN_REG(index));
irqen &= ~DMA_PKG_IRQ_EN(index);
DMA_WRITE(sc, DMA_IRQ_EN_REG(index), irqen);
DMA_WRITE(sc, DMA_IRQ_PEND_REG(index), DMA_PKG_IRQ_EN(index));
ch->callback = NULL;
ch->callbackarg = NULL;
mtx_unlock_spin(&sc->mtx);
}
static int
a31dmac_transfer(device_t dev, void *priv, bus_addr_t src, bus_addr_t dst,
size_t nbytes)
{
struct a31dmac_channel *ch;
struct a31dmac_softc *sc;
ch = priv;
sc = ch->sc;
ch->desc->srcaddr = htole32((uint32_t)src);
ch->desc->dstaddr = htole32((uint32_t)dst);
ch->desc->bcnt = htole32(nbytes);
ch->desc->next = htole32(DMA_NULL);
DMA_WRITE(sc, DMA_STAR_ADDR_REG(ch->index), (uint32_t)ch->physaddr);
DMA_WRITE(sc, DMA_EN_REG(ch->index), DMA_EN);
return (0);
}
static void
a31dmac_halt(device_t dev, void *priv)
{
struct a31dmac_channel *ch;
struct a31dmac_softc *sc;
ch = priv;
sc = ch->sc;
DMA_WRITE(sc, DMA_EN_REG(ch->index), 0);
}
static device_method_t a31dmac_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, a31dmac_probe),
DEVMETHOD(device_attach, a31dmac_attach),
/* sunxi DMA interface */
DEVMETHOD(sunxi_dma_alloc, a31dmac_alloc),
DEVMETHOD(sunxi_dma_free, a31dmac_free),
DEVMETHOD(sunxi_dma_set_config, a31dmac_set_config),
DEVMETHOD(sunxi_dma_transfer, a31dmac_transfer),
DEVMETHOD(sunxi_dma_halt, a31dmac_halt),
DEVMETHOD_END
};
static driver_t a31dmac_driver = {
"a31dmac",
a31dmac_methods,
sizeof(struct a31dmac_softc)
};
static devclass_t a31dmac_devclass;
DRIVER_MODULE(a31dmac, simplebus, a31dmac_driver, a31dmac_devclass, 0, 0);
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