diff options
Diffstat (limited to 'sys/mips/cavium/ciu.c')
| -rw-r--r-- | sys/mips/cavium/ciu.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/sys/mips/cavium/ciu.c b/sys/mips/cavium/ciu.c new file mode 100644 index 000000000000..eb58928ca958 --- /dev/null +++ b/sys/mips/cavium/ciu.c @@ -0,0 +1,374 @@ +/*- + * Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org> + * 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 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. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/interrupt.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/rman.h> +#include <sys/malloc.h> + +#include <machine/bus.h> +#include <machine/intr_machdep.h> + +#include <contrib/octeon-sdk/cvmx.h> +#include <contrib/octeon-sdk/cvmx-interrupt.h> + +/* + * This bus sits between devices/buses and nexus and handles CIU interrupts + * and passes everything else through. It should really be a nexus subclass + * or something, but for now this will be sufficient. + */ + +#define CIU_IRQ_HARD (0) + +#define CIU_IRQ_EN0_BEGIN CVMX_IRQ_WORKQ0 +#define CIU_IRQ_EN0_END CVMX_IRQ_BOOTDMA +#define CIU_IRQ_EN0_COUNT ((CIU_IRQ_EN0_END - CIU_IRQ_EN0_BEGIN) + 1) + +#define CIU_IRQ_EN1_BEGIN CVMX_IRQ_WDOG0 +#define CIU_IRQ_EN1_END CVMX_IRQ_WDOG15 +#define CIU_IRQ_EN1_COUNT ((CIU_IRQ_EN1_END - CIU_IRQ_EN1_BEGIN) + 1) + +struct ciu_softc { + struct rman irq_rman; + struct resource *ciu_irq; +}; + +static mips_intrcnt_t ciu_en0_intrcnt[CIU_IRQ_EN0_COUNT]; +static mips_intrcnt_t ciu_en1_intrcnt[CIU_IRQ_EN1_COUNT]; + +static struct intr_event *ciu_en0_intr_events[CIU_IRQ_EN0_COUNT]; +static struct intr_event *ciu_en1_intr_events[CIU_IRQ_EN1_COUNT]; + +static int ciu_probe(device_t); +static int ciu_attach(device_t); +static struct resource *ciu_alloc_resource(device_t, device_t, int, int *, + u_long, u_long, u_long, u_int); +static int ciu_setup_intr(device_t, device_t, struct resource *, + int, driver_filter_t *, driver_intr_t *, + void *, void **); +static int ciu_teardown_intr(device_t, device_t, + struct resource *, void *); +static void ciu_hinted_child(device_t, const char *, int); + +static void ciu_en0_intr_mask(void *); +static void ciu_en0_intr_unmask(void *); + +static void ciu_en1_intr_mask(void *); +static void ciu_en1_intr_unmask(void *); + +static int ciu_intr(void *); + +static int +ciu_probe(device_t dev) +{ + if (device_get_unit(dev) != 0) + return (ENXIO); + + device_set_desc(dev, "Cavium Octeon Central Interrupt Unit"); + return (0); +} + +static int +ciu_attach(device_t dev) +{ + char name[MAXCOMLEN + 1]; + struct ciu_softc *sc; + unsigned i; + int error; + int rid; + + sc = device_get_softc(dev); + + rid = 0; + sc->ciu_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, CIU_IRQ_HARD, + CIU_IRQ_HARD, 1, RF_ACTIVE); + if (sc->ciu_irq == NULL) { + device_printf(dev, "could not allocate irq%d\n", CIU_IRQ_HARD); + return (ENXIO); + } + + error = bus_setup_intr(dev, sc->ciu_irq, INTR_TYPE_MISC, ciu_intr, + NULL, sc, NULL); + if (error != 0) { + device_printf(dev, "bus_setup_intr failed: %d\n", error); + return (error); + } + + sc->irq_rman.rm_type = RMAN_ARRAY; + sc->irq_rman.rm_descr = "CIU IRQ"; + + error = rman_init(&sc->irq_rman); + if (error != 0) + return (error); + + /* + * We have two contiguous IRQ regions, use a single rman. + */ + error = rman_manage_region(&sc->irq_rman, CIU_IRQ_EN0_BEGIN, + CIU_IRQ_EN1_END); + if (error != 0) + return (error); + + for (i = 0; i < CIU_IRQ_EN0_COUNT; i++) { + snprintf(name, sizeof name, "int%d:", i + CIU_IRQ_EN0_BEGIN); + ciu_en0_intrcnt[i] = mips_intrcnt_create(name); + } + + for (i = 0; i < CIU_IRQ_EN1_COUNT; i++) { + snprintf(name, sizeof name, "int%d:", i + CIU_IRQ_EN1_BEGIN); + ciu_en1_intrcnt[i] = mips_intrcnt_create(name); + } + + bus_generic_probe(dev); + bus_generic_attach(dev); + + return (0); +} + +static struct resource * +ciu_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + struct resource *res; + struct ciu_softc *sc; + + sc = device_get_softc(bus); + + switch (type) { + case SYS_RES_IRQ: + break; + default: + return (bus_alloc_resource(device_get_parent(bus), type, rid, + start, end, count, flags)); + } + + /* + * One interrupt at a time for now. + */ + if (start != end) + return (NULL); + + res = rman_reserve_resource(&sc->irq_rman, start, end, count, flags, + child); + if (res != NULL) + return (res); + + return (NULL); +} + +static int +ciu_setup_intr(device_t bus, device_t child, struct resource *res, int flags, + driver_filter_t *filter, driver_intr_t *intr, void *arg, + void **cookiep) +{ + struct intr_event *event, **eventp; + void (*mask_func)(void *); + void (*unmask_func)(void *); + mips_intrcnt_t intrcnt; + int error; + int irq; + + irq = rman_get_start(res); + if (irq <= CIU_IRQ_EN0_END) { + eventp = &ciu_en0_intr_events[irq - CIU_IRQ_EN0_BEGIN]; + intrcnt = ciu_en0_intrcnt[irq - CIU_IRQ_EN0_BEGIN]; + mask_func = ciu_en0_intr_mask; + unmask_func = ciu_en0_intr_unmask; + } else { + eventp = &ciu_en1_intr_events[irq - CIU_IRQ_EN1_BEGIN]; + intrcnt = ciu_en1_intrcnt[irq - CIU_IRQ_EN1_BEGIN]; + mask_func = ciu_en1_intr_mask; + unmask_func = ciu_en1_intr_unmask; + } + + if ((event = *eventp) == NULL) { + error = intr_event_create(eventp, (void *)(uintptr_t)irq, 0, + irq, mask_func, unmask_func, NULL, NULL, "int%d", irq); + if (error != 0) + return (error); + + event = *eventp; + + unmask_func((void *)(uintptr_t)irq); + } + + intr_event_add_handler(event, device_get_nameunit(child), + filter, intr, arg, intr_priority(flags), flags, cookiep); + + mips_intrcnt_setname(intrcnt, event->ie_fullname); + + return (0); +} + +static int +ciu_teardown_intr(device_t bus, device_t child, struct resource *res, + void *cookie) +{ + int error; + + error = intr_event_remove_handler(cookie); + if (error != 0) + return (error); + + return (0); +} + +static void +ciu_hinted_child(device_t bus, const char *dname, int dunit) +{ + BUS_ADD_CHILD(bus, 0, dname, dunit); +} + +static void +ciu_en0_intr_mask(void *arg) +{ + uint64_t mask; + int irq; + + irq = (uintptr_t)arg; + mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2)); + mask &= ~(1ull << (irq - CIU_IRQ_EN0_BEGIN)); + cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2), mask); +} + +static void +ciu_en0_intr_unmask(void *arg) +{ + uint64_t mask; + int irq; + + irq = (uintptr_t)arg; + mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2)); + mask |= 1ull << (irq - CIU_IRQ_EN0_BEGIN); + cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2), mask); +} + +static void +ciu_en1_intr_mask(void *arg) +{ + uint64_t mask; + int irq; + + irq = (uintptr_t)arg; + mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2)); + mask &= ~(1ull << (irq - CIU_IRQ_EN1_BEGIN)); + cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2), mask); +} + +static void +ciu_en1_intr_unmask(void *arg) +{ + uint64_t mask; + int irq; + + irq = (uintptr_t)arg; + mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2)); + mask |= 1ull << (irq - CIU_IRQ_EN1_BEGIN); + cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2), mask); +} + +static int +ciu_intr(void *arg) +{ + struct ciu_softc *sc; + uint64_t en0_sum, en1_sum; + uint64_t en0_mask, en1_mask; + int irq_index; + int error; + + sc = arg; + (void)sc; + + en0_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(cvmx_get_core_num()*2)); + en1_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1); + + en0_mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2)); + en1_mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2)); + + en0_sum &= en0_mask; + en1_sum &= en1_mask; + + if (en0_sum == 0 && en1_sum == 0) + return (FILTER_STRAY); + + irq_index = 0; + for (irq_index = 0; en0_sum != 0; irq_index++, en0_sum >>= 1) { + if ((en0_sum & 1) == 0) + continue; + + mips_intrcnt_inc(ciu_en0_intrcnt[irq_index]); + + error = intr_event_handle(ciu_en0_intr_events[irq_index], NULL); + if (error != 0) + printf("%s: stray en0 irq%d\n", __func__, irq_index); + } + + irq_index = 0; + for (irq_index = 0; en1_sum != 0; irq_index++, en1_sum >>= 1) { + if ((en1_sum & 1) == 0) + continue; + + mips_intrcnt_inc(ciu_en1_intrcnt[irq_index]); + + error = intr_event_handle(ciu_en1_intr_events[irq_index], NULL); + if (error != 0) + printf("%s: stray en1 irq%d\n", __func__, irq_index); + } + + return (FILTER_HANDLED); +} + +static device_method_t ciu_methods[] = { + DEVMETHOD(device_probe, ciu_probe), + DEVMETHOD(device_attach, ciu_attach), + + DEVMETHOD(bus_alloc_resource, ciu_alloc_resource), + DEVMETHOD(bus_activate_resource,bus_generic_activate_resource), + DEVMETHOD(bus_setup_intr, ciu_setup_intr), + DEVMETHOD(bus_teardown_intr, ciu_teardown_intr), + + DEVMETHOD(bus_add_child, bus_generic_add_child), + DEVMETHOD(bus_hinted_child, ciu_hinted_child), + + { 0, 0 } +}; + +static driver_t ciu_driver = { + "ciu", + ciu_methods, + sizeof(struct ciu_softc), +}; +static devclass_t ciu_devclass; +DRIVER_MODULE(ciu, nexus, ciu_driver, ciu_devclass, 0, 0); |