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freebsd-nq/sys/arm/broadcom/bcm2835/bcm2835_intr.c
Ian Lepore 9e655cd522 Move the reporting of spurious interrupts under bootverbose control, because 
occasional spurious interrupts are a normal thing on this hardware.  Also,
change the name of the cpu-local interrupt controller driver from local_intc
to lintc, because the name gets built into interrupt names, which have to
fit into a 19-byte field for stats reporting (so this allows 5 more bytes
of the actual interrupt name to be displayed).
2019-04-21 17:39:01 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
* All rights reserved.
*
* Based on OMAP3 INTC code by Ben Gray
*
* 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 THE 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("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "pic_if.h"
#define INTC_PENDING_BASIC 0x00
#define INTC_PENDING_BANK1 0x04
#define INTC_PENDING_BANK2 0x08
#define INTC_FIQ_CONTROL 0x0C
#define INTC_ENABLE_BANK1 0x10
#define INTC_ENABLE_BANK2 0x14
#define INTC_ENABLE_BASIC 0x18
#define INTC_DISABLE_BANK1 0x1C
#define INTC_DISABLE_BANK2 0x20
#define INTC_DISABLE_BASIC 0x24
#define INTC_PENDING_BASIC_ARM 0x0000FF
#define INTC_PENDING_BASIC_GPU1_PEND 0x000100
#define INTC_PENDING_BASIC_GPU2_PEND 0x000200
#define INTC_PENDING_BASIC_GPU1_7 0x000400
#define INTC_PENDING_BASIC_GPU1_9 0x000800
#define INTC_PENDING_BASIC_GPU1_10 0x001000
#define INTC_PENDING_BASIC_GPU1_18 0x002000
#define INTC_PENDING_BASIC_GPU1_19 0x004000
#define INTC_PENDING_BASIC_GPU2_21 0x008000
#define INTC_PENDING_BASIC_GPU2_22 0x010000
#define INTC_PENDING_BASIC_GPU2_23 0x020000
#define INTC_PENDING_BASIC_GPU2_24 0x040000
#define INTC_PENDING_BASIC_GPU2_25 0x080000
#define INTC_PENDING_BASIC_GPU2_30 0x100000
#define INTC_PENDING_BASIC_MASK 0x1FFFFF
#define INTC_PENDING_BASIC_GPU1_MASK (INTC_PENDING_BASIC_GPU1_7 | \
INTC_PENDING_BASIC_GPU1_9 | \
INTC_PENDING_BASIC_GPU1_10 | \
INTC_PENDING_BASIC_GPU1_18 | \
INTC_PENDING_BASIC_GPU1_19)
#define INTC_PENDING_BASIC_GPU2_MASK (INTC_PENDING_BASIC_GPU2_21 | \
INTC_PENDING_BASIC_GPU2_22 | \
INTC_PENDING_BASIC_GPU2_23 | \
INTC_PENDING_BASIC_GPU2_24 | \
INTC_PENDING_BASIC_GPU2_25 | \
INTC_PENDING_BASIC_GPU2_30)
#define INTC_PENDING_BANK1_MASK (~((1 << 7) | (1 << 9) | (1 << 10) | \
(1 << 18) | (1 << 19)))
#define INTC_PENDING_BANK2_MASK (~((1 << 21) | (1 << 22) | (1 << 23) | \
(1 << 24) | (1 << 25) | (1 << 30)))
#define BANK1_START 8
#define BANK1_END (BANK1_START + 32 - 1)
#define BANK2_START (BANK1_START + 32)
#define BANK2_END (BANK2_START + 32 - 1)
#define IS_IRQ_BASIC(n) (((n) >= 0) && ((n) < BANK1_START))
#define IS_IRQ_BANK1(n) (((n) >= BANK1_START) && ((n) <= BANK1_END))
#define IS_IRQ_BANK2(n) (((n) >= BANK2_START) && ((n) <= BANK2_END))
#define IRQ_BANK1(n) ((n) - BANK1_START)
#define IRQ_BANK2(n) ((n) - BANK2_START)
#ifdef DEBUG
#define dprintf(fmt, args...) printf(fmt, ##args)
#else
#define dprintf(fmt, args...)
#endif
#define BCM_INTC_NIRQS 72 /* 8 + 32 + 32 */
struct bcm_intc_irqsrc {
struct intr_irqsrc bii_isrc;
u_int bii_irq;
uint16_t bii_disable_reg;
uint16_t bii_enable_reg;
uint32_t bii_mask;
};
struct bcm_intc_softc {
device_t sc_dev;
struct resource * intc_res;
bus_space_tag_t intc_bst;
bus_space_handle_t intc_bsh;
struct resource * intc_irq_res;
void * intc_irq_hdl;
struct bcm_intc_irqsrc intc_isrcs[BCM_INTC_NIRQS];
};
static struct ofw_compat_data compat_data[] = {
{"broadcom,bcm2835-armctrl-ic", 1},
{"brcm,bcm2835-armctrl-ic", 1},
{"brcm,bcm2836-armctrl-ic", 1},
{NULL, 0}
};
static struct bcm_intc_softc *bcm_intc_sc = NULL;
#define intc_read_4(_sc, reg) \
bus_space_read_4((_sc)->intc_bst, (_sc)->intc_bsh, (reg))
#define intc_write_4(_sc, reg, val) \
bus_space_write_4((_sc)->intc_bst, (_sc)->intc_bsh, (reg), (val))
static inline void
bcm_intc_isrc_mask(struct bcm_intc_softc *sc, struct bcm_intc_irqsrc *bii)
{
intc_write_4(sc, bii->bii_disable_reg, bii->bii_mask);
}
static inline void
bcm_intc_isrc_unmask(struct bcm_intc_softc *sc, struct bcm_intc_irqsrc *bii)
{
intc_write_4(sc, bii->bii_enable_reg, bii->bii_mask);
}
static inline int
bcm2835_intc_active_intr(struct bcm_intc_softc *sc)
{
uint32_t pending, pending_gpu;
pending = intc_read_4(sc, INTC_PENDING_BASIC) & INTC_PENDING_BASIC_MASK;
if (pending == 0)
return (-1);
if (pending & INTC_PENDING_BASIC_ARM)
return (ffs(pending) - 1);
if (pending & INTC_PENDING_BASIC_GPU1_MASK) {
if (pending & INTC_PENDING_BASIC_GPU1_7)
return (BANK1_START + 7);
if (pending & INTC_PENDING_BASIC_GPU1_9)
return (BANK1_START + 9);
if (pending & INTC_PENDING_BASIC_GPU1_10)
return (BANK1_START + 10);
if (pending & INTC_PENDING_BASIC_GPU1_18)
return (BANK1_START + 18);
if (pending & INTC_PENDING_BASIC_GPU1_19)
return (BANK1_START + 19);
}
if (pending & INTC_PENDING_BASIC_GPU2_MASK) {
if (pending & INTC_PENDING_BASIC_GPU2_21)
return (BANK2_START + 21);
if (pending & INTC_PENDING_BASIC_GPU2_22)
return (BANK2_START + 22);
if (pending & INTC_PENDING_BASIC_GPU2_23)
return (BANK2_START + 23);
if (pending & INTC_PENDING_BASIC_GPU2_24)
return (BANK2_START + 24);
if (pending & INTC_PENDING_BASIC_GPU2_25)
return (BANK2_START + 25);
if (pending & INTC_PENDING_BASIC_GPU2_30)
return (BANK2_START + 30);
}
if (pending & INTC_PENDING_BASIC_GPU1_PEND) {
pending_gpu = intc_read_4(sc, INTC_PENDING_BANK1);
pending_gpu &= INTC_PENDING_BANK1_MASK;
if (pending_gpu != 0)
return (BANK1_START + ffs(pending_gpu) - 1);
}
if (pending & INTC_PENDING_BASIC_GPU2_PEND) {
pending_gpu = intc_read_4(sc, INTC_PENDING_BANK2);
pending_gpu &= INTC_PENDING_BANK2_MASK;
if (pending_gpu != 0)
return (BANK2_START + ffs(pending_gpu) - 1);
}
return (-1); /* It shouldn't end here, but it's hardware. */
}
static int
bcm2835_intc_intr(void *arg)
{
int irq, num;
struct bcm_intc_softc *sc = arg;
for (num = 0; ; num++) {
irq = bcm2835_intc_active_intr(sc);
if (irq == -1)
break;
if (intr_isrc_dispatch(&sc->intc_isrcs[irq].bii_isrc,
curthread->td_intr_frame) != 0) {
bcm_intc_isrc_mask(sc, &sc->intc_isrcs[irq]);
device_printf(sc->sc_dev, "Stray irq %u disabled\n",
irq);
}
arm_irq_memory_barrier(0); /* XXX */
}
if (num == 0 && bootverbose)
device_printf(sc->sc_dev, "Spurious interrupt detected\n");
return (FILTER_HANDLED);
}
static void
bcm_intc_enable_intr(device_t dev, struct intr_irqsrc *isrc)
{
struct bcm_intc_irqsrc *bii = (struct bcm_intc_irqsrc *)isrc;
arm_irq_memory_barrier(bii->bii_irq);
bcm_intc_isrc_unmask(device_get_softc(dev), bii);
}
static void
bcm_intc_disable_intr(device_t dev, struct intr_irqsrc *isrc)
{
bcm_intc_isrc_mask(device_get_softc(dev),
(struct bcm_intc_irqsrc *)isrc);
}
static int
bcm_intc_map_intr(device_t dev, struct intr_map_data *data,
struct intr_irqsrc **isrcp)
{
u_int irq;
struct intr_map_data_fdt *daf;
struct bcm_intc_softc *sc;
bool valid;
if (data->type != INTR_MAP_DATA_FDT)
return (ENOTSUP);
daf = (struct intr_map_data_fdt *)data;
if (daf->ncells == 1)
irq = daf->cells[0];
else if (daf->ncells == 2) {
valid = true;
switch (daf->cells[0]) {
case 0:
irq = daf->cells[1];
if (irq >= BANK1_START)
valid = false;
break;
case 1:
irq = daf->cells[1] + BANK1_START;
if (irq > BANK1_END)
valid = false;
break;
case 2:
irq = daf->cells[1] + BANK2_START;
if (irq > BANK2_END)
valid = false;
break;
default:
valid = false;
break;
}
if (!valid) {
device_printf(dev,
"invalid IRQ config: bank=%d, irq=%d\n",
daf->cells[0], daf->cells[1]);
return (EINVAL);
}
}
else
return (EINVAL);
if (irq >= BCM_INTC_NIRQS)
return (EINVAL);
sc = device_get_softc(dev);
*isrcp = &sc->intc_isrcs[irq].bii_isrc;
return (0);
}
static void
bcm_intc_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
{
bcm_intc_disable_intr(dev, isrc);
}
static void
bcm_intc_post_ithread(device_t dev, struct intr_irqsrc *isrc)
{
bcm_intc_enable_intr(dev, isrc);
}
static void
bcm_intc_post_filter(device_t dev, struct intr_irqsrc *isrc)
{
}
static int
bcm_intc_pic_register(struct bcm_intc_softc *sc, intptr_t xref)
{
struct bcm_intc_irqsrc *bii;
int error;
uint32_t irq;
const char *name;
name = device_get_nameunit(sc->sc_dev);
for (irq = 0; irq < BCM_INTC_NIRQS; irq++) {
bii = &sc->intc_isrcs[irq];
bii->bii_irq = irq;
if (IS_IRQ_BASIC(irq)) {
bii->bii_disable_reg = INTC_DISABLE_BASIC;
bii->bii_enable_reg = INTC_ENABLE_BASIC;
bii->bii_mask = 1 << irq;
} else if (IS_IRQ_BANK1(irq)) {
bii->bii_disable_reg = INTC_DISABLE_BANK1;
bii->bii_enable_reg = INTC_ENABLE_BANK1;
bii->bii_mask = 1 << IRQ_BANK1(irq);
} else if (IS_IRQ_BANK2(irq)) {
bii->bii_disable_reg = INTC_DISABLE_BANK2;
bii->bii_enable_reg = INTC_ENABLE_BANK2;
bii->bii_mask = 1 << IRQ_BANK2(irq);
} else
return (ENXIO);
error = intr_isrc_register(&bii->bii_isrc, sc->sc_dev, 0,
"%s,%u", name, irq);
if (error != 0)
return (error);
}
if (intr_pic_register(sc->sc_dev, xref) == NULL)
return (ENXIO);
return (0);
}
static int
bcm_intc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "BCM2835 Interrupt Controller");
return (BUS_PROBE_DEFAULT);
}
static int
bcm_intc_attach(device_t dev)
{
struct bcm_intc_softc *sc = device_get_softc(dev);
int rid = 0;
intptr_t xref;
sc->sc_dev = dev;
if (bcm_intc_sc)
return (ENXIO);
sc->intc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (sc->intc_res == NULL) {
device_printf(dev, "could not allocate memory resource\n");
return (ENXIO);
}
xref = OF_xref_from_node(ofw_bus_get_node(dev));
if (bcm_intc_pic_register(sc, xref) != 0) {
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->intc_res);
device_printf(dev, "could not register PIC\n");
return (ENXIO);
}
rid = 0;
sc->intc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->intc_irq_res == NULL) {
if (intr_pic_claim_root(dev, xref, bcm2835_intc_intr, sc, 0) != 0) {
/* XXX clean up */
device_printf(dev, "could not set PIC as a root\n");
return (ENXIO);
}
} else {
if (bus_setup_intr(dev, sc->intc_irq_res, INTR_TYPE_CLK,
bcm2835_intc_intr, NULL, sc, &sc->intc_irq_hdl)) {
/* XXX clean up */
device_printf(dev, "could not setup irq handler\n");
return (ENXIO);
}
}
sc->intc_bst = rman_get_bustag(sc->intc_res);
sc->intc_bsh = rman_get_bushandle(sc->intc_res);
bcm_intc_sc = sc;
return (0);
}
static device_method_t bcm_intc_methods[] = {
DEVMETHOD(device_probe, bcm_intc_probe),
DEVMETHOD(device_attach, bcm_intc_attach),
DEVMETHOD(pic_disable_intr, bcm_intc_disable_intr),
DEVMETHOD(pic_enable_intr, bcm_intc_enable_intr),
DEVMETHOD(pic_map_intr, bcm_intc_map_intr),
DEVMETHOD(pic_post_filter, bcm_intc_post_filter),
DEVMETHOD(pic_post_ithread, bcm_intc_post_ithread),
DEVMETHOD(pic_pre_ithread, bcm_intc_pre_ithread),
{ 0, 0 }
};
static driver_t bcm_intc_driver = {
"intc",
bcm_intc_methods,
sizeof(struct bcm_intc_softc),
};
static devclass_t bcm_intc_devclass;
EARLY_DRIVER_MODULE(intc, simplebus, bcm_intc_driver, bcm_intc_devclass,
0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
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