diff --git a/sys/arm64/arm64/nexus.c b/sys/arm64/arm64/nexus.c index 321113c7f57e..a5408bb1c86c 100644 --- a/sys/arm64/arm64/nexus.c +++ b/sys/arm64/arm64/nexus.c @@ -1,532 +1,549 @@ /*- * Copyright 1998 Massachusetts Institute of Technology * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that both the above copyright notice and this * permission notice appear in all copies, that both the above * copyright notice and this permission notice appear in all * supporting documentation, and that the name of M.I.T. not be used * in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. M.I.T. makes * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied * warranty. * * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT * SHALL M.I.T. 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. * */ /* * This code implements a `root nexus' for Arm Architecture * machines. The function of the root nexus is to serve as an * attachment point for both processors and buses, and to manage * resources which are common to all of them. In particular, * this code implements the core resource managers for interrupt * requests, DMA requests (which rightfully should be a part of the * ISA code but it's easier to do it here for now), I/O port addresses, * and I/O memory address space. */ #include "opt_acpi.h" #include "opt_platform.h" #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef FDT #include #include #include "ofw_bus_if.h" #endif #ifdef DEV_ACPI #include #include #include "acpi_bus_if.h" #include "pcib_if.h" #endif extern struct bus_space memmap_bus; static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); struct nexus_device { struct resource_list nx_resources; }; #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) static struct rman mem_rman; static struct rman irq_rman; static int nexus_attach(device_t); #ifdef FDT static device_probe_t nexus_fdt_probe; static device_attach_t nexus_fdt_attach; #endif #ifdef DEV_ACPI static device_probe_t nexus_acpi_probe; static device_attach_t nexus_acpi_attach; #endif static int nexus_print_child(device_t, device_t); static device_t nexus_add_child(device_t, u_int, const char *, int); static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, rman_res_t, rman_res_t, rman_res_t, u_int); static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol); static struct resource_list *nexus_get_reslist(device_t, device_t); static int nexus_set_resource(device_t, device_t, int, int, rman_res_t, rman_res_t); static int nexus_deactivate_resource(device_t, device_t, int, int, struct resource *); +static int nexus_release_resource(device_t, device_t, int, int, + struct resource *); static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep); static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); #ifdef SMP static int nexus_bind_intr(device_t, device_t, struct resource *, int); #endif #ifdef FDT static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, pcell_t *intr); #endif static device_method_t nexus_methods[] = { /* Bus interface */ DEVMETHOD(bus_print_child, nexus_print_child), DEVMETHOD(bus_add_child, nexus_add_child), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_activate_resource, nexus_activate_resource), DEVMETHOD(bus_config_intr, nexus_config_intr), DEVMETHOD(bus_get_resource_list, nexus_get_reslist), DEVMETHOD(bus_set_resource, nexus_set_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), + DEVMETHOD(bus_release_resource, nexus_release_resource), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), #ifdef SMP DEVMETHOD(bus_bind_intr, nexus_bind_intr), #endif { 0, 0 } }; static driver_t nexus_driver = { "nexus", nexus_methods, 1 /* no softc */ }; static int nexus_attach(device_t dev) { mem_rman.rm_start = 0; mem_rman.rm_end = BUS_SPACE_MAXADDR; mem_rman.rm_type = RMAN_ARRAY; mem_rman.rm_descr = "I/O memory addresses"; if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, BUS_SPACE_MAXADDR)) panic("nexus_attach mem_rman"); irq_rman.rm_start = 0; irq_rman.rm_end = ~0; irq_rman.rm_type = RMAN_ARRAY; irq_rman.rm_descr = "Interrupts"; if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, 0, ~0)) panic("nexus_attach irq_rman"); bus_generic_probe(dev); bus_generic_attach(dev); return (0); } static int nexus_print_child(device_t bus, device_t child) { int retval = 0; retval += bus_print_child_header(bus, child); retval += printf("\n"); return (retval); } static device_t nexus_add_child(device_t bus, u_int order, const char *name, int unit) { device_t child; struct nexus_device *ndev; ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); if (!ndev) return (0); resource_list_init(&ndev->nx_resources); child = device_add_child_ordered(bus, order, name, unit); /* should we free this in nexus_child_detached? */ device_set_ivars(child, ndev); return (child); } /* * Allocate a resource on behalf of child. NB: child is usually going to be a * child of one of our descendants, not a direct child of nexus0. * (Exceptions include footbridge.) */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct nexus_device *ndev = DEVTONX(child); struct resource *rv; struct resource_list_entry *rle; struct rman *rm; int needactivate = flags & RF_ACTIVE; /* * If this is an allocation of the "default" range for a given * RID, and we know what the resources for this device are * (ie. they aren't maintained by a child bus), then work out * the start/end values. */ if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { if (device_get_parent(child) != bus || ndev == NULL) return(NULL); rle = resource_list_find(&ndev->nx_resources, type, *rid); if (rle == NULL) return(NULL); start = rle->start; end = rle->end; count = rle->count; } switch (type) { case SYS_RES_IRQ: rm = &irq_rman; break; case SYS_RES_MEMORY: case SYS_RES_IOPORT: rm = &mem_rman; break; default: return (NULL); } rv = rman_reserve_resource(rm, start, end, count, flags, child); if (rv == NULL) return (NULL); rman_set_rid(rv, *rid); rman_set_bushandle(rv, rman_get_start(rv)); if (needactivate) { if (bus_activate_resource(child, type, *rid, rv)) { rman_release_resource(rv); return (NULL); } } return (rv); } +static int +nexus_release_resource(device_t bus, device_t child, int type, int rid, + struct resource *res) +{ + int error; + + if (rman_get_flags(res) & RF_ACTIVE) { + error = bus_deactivate_resource(child, type, rid, res); + if (error) + return (error); + } + return (rman_release_resource(res)); +} + static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) { /* TODO: This is wrong, it's needed for ACPI */ device_printf(dev, "bus_config_intr is obsolete and not supported!\n"); return (EOPNOTSUPP); } static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) { int error; if ((rman_get_flags(res) & RF_SHAREABLE) == 0) flags |= INTR_EXCL; /* We depend here on rman_activate_resource() being idempotent. */ error = rman_activate_resource(res); if (error) return (error); error = intr_setup_irq(child, res, filt, intr, arg, flags, cookiep); return (error); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) { return (intr_teardown_irq(child, r, ih)); } #ifdef SMP static int nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu) { return (intr_bind_irq(child, irq, cpu)); } #endif static bus_space_tag_t nexus_get_bus_tag(device_t bus __unused, device_t child __unused) { return(&memmap_bus); } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { int err; bus_addr_t paddr; bus_size_t psize; bus_space_handle_t vaddr; if ((err = rman_activate_resource(r)) != 0) return (err); /* * If this is a memory resource, map it into the kernel. */ if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { paddr = (bus_addr_t)rman_get_start(r); psize = (bus_size_t)rman_get_size(r); err = bus_space_map(&memmap_bus, paddr, psize, 0, &vaddr); if (err != 0) { rman_deactivate_resource(r); return (err); } rman_set_bustag(r, &memmap_bus); rman_set_virtual(r, (void *)vaddr); rman_set_bushandle(r, vaddr); } else if (type == SYS_RES_IRQ) { err = intr_activate_irq(child, r); if (err != 0) { rman_deactivate_resource(r); return (err); } } return (0); } static struct resource_list * nexus_get_reslist(device_t dev, device_t child) { struct nexus_device *ndev = DEVTONX(child); return (&ndev->nx_resources); } static int nexus_set_resource(device_t dev, device_t child, int type, int rid, rman_res_t start, rman_res_t count) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; /* XXX this should return a success/failure indicator */ resource_list_add(rl, type, rid, start, start + count - 1, count); return(0); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { bus_size_t psize; bus_space_handle_t vaddr; if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { psize = (bus_size_t)rman_get_size(r); vaddr = rman_get_bushandle(r); if (vaddr != 0) { bus_space_unmap(&memmap_bus, vaddr, psize); rman_set_virtual(r, NULL); rman_set_bushandle(r, 0); } } else if (type == SYS_RES_IRQ) { intr_deactivate_irq(child, r); } return (rman_deactivate_resource(r)); } #ifdef FDT static device_method_t nexus_fdt_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_fdt_probe), DEVMETHOD(device_attach, nexus_fdt_attach), /* OFW interface */ DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), DEVMETHOD_END, }; #define nexus_baseclasses nexus_fdt_baseclasses DEFINE_CLASS_1(nexus, nexus_fdt_driver, nexus_fdt_methods, 1, nexus_driver); #undef nexus_baseclasses static devclass_t nexus_fdt_devclass; EARLY_DRIVER_MODULE(nexus_fdt, root, nexus_fdt_driver, nexus_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); static int nexus_fdt_probe(device_t dev) { if (arm64_bus_method != ARM64_BUS_FDT) return (ENXIO); device_quiet(dev); return (BUS_PROBE_DEFAULT); } static int nexus_fdt_attach(device_t dev) { nexus_add_child(dev, 10, "ofwbus", 0); return (nexus_attach(dev)); } static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, pcell_t *intr) { u_int irq; struct intr_map_data_fdt *fdt_data; size_t len; len = sizeof(*fdt_data) + icells * sizeof(pcell_t); fdt_data = (struct intr_map_data_fdt *)intr_alloc_map_data( INTR_MAP_DATA_FDT, len, M_WAITOK | M_ZERO); fdt_data->iparent = iparent; fdt_data->ncells = icells; memcpy(fdt_data->cells, intr, icells * sizeof(pcell_t)); irq = intr_map_irq(NULL, iparent, (struct intr_map_data *)fdt_data); return (irq); } #endif #ifdef DEV_ACPI static int nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol); static device_method_t nexus_acpi_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_acpi_probe), DEVMETHOD(device_attach, nexus_acpi_attach), /* ACPI interface */ DEVMETHOD(acpi_bus_map_intr, nexus_acpi_map_intr), DEVMETHOD_END, }; #define nexus_baseclasses nexus_acpi_baseclasses DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); #undef nexus_baseclasses static devclass_t nexus_acpi_devclass; EARLY_DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_acpi_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); static int nexus_acpi_probe(device_t dev) { if (arm64_bus_method != ARM64_BUS_ACPI || acpi_identify() != 0) return (ENXIO); device_quiet(dev); return (BUS_PROBE_LOW_PRIORITY); } static int nexus_acpi_attach(device_t dev) { nexus_add_child(dev, 10, "acpi", 0); return (nexus_attach(dev)); } static int nexus_acpi_map_intr(device_t dev, device_t child, u_int irq, int trig, int pol) { struct intr_map_data_acpi *acpi_data; size_t len; len = sizeof(*acpi_data); acpi_data = (struct intr_map_data_acpi *)intr_alloc_map_data( INTR_MAP_DATA_ACPI, len, M_WAITOK | M_ZERO); acpi_data->irq = irq; acpi_data->pol = pol; acpi_data->trig = trig; /* * TODO: This will only handle a single interrupt controller. * ACPI will map multiple controllers into a single virtual IRQ * space. Each controller has a System Vector Base to hold the * first irq it handles in this space. As such the correct way * to handle interrupts with ACPI is to search through the * controllers for the largest base value that is no larger than * the IRQ value. */ irq = intr_map_irq(NULL, ACPI_INTR_XREF, (struct intr_map_data *)acpi_data); return (irq); } #endif