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| Current File : //sys/ia64/ia64/nexus.c |
/*-
* 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.
*
* $FreeBSD: release/9.1.0/sys/ia64/ia64/nexus.c 224184 2011-07-18 14:04:37Z jhb $
*/
/*
* This code implements a `root nexus' for Intel 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/interrupt.h>
#include <sys/pcpu.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/efi.h>
#include <machine/intr.h>
#include <machine/pmap.h>
#include <machine/resource.h>
#include <machine/vmparam.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
#include <isa/isareg.h>
#include <sys/rtprio.h>
#include "clock_if.h"
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 irq_rman, port_rman, mem_rman;
static int nexus_probe(device_t);
static int nexus_attach(device_t);
static int nexus_print_child(device_t, device_t);
static device_t nexus_add_child(device_t bus, u_int order, const char *name,
int unit);
static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int nexus_adjust_resource(device_t, device_t, int, struct resource *,
u_long, u_long);
static int nexus_activate_resource(device_t, device_t, int, int,
struct resource *);
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, device_t, struct resource *, int flags,
driver_filter_t filter, void (*)(void *), void *,
void **);
static int nexus_teardown_intr(device_t, device_t, struct resource *,
void *);
static struct resource_list *nexus_get_reslist(device_t dev, device_t child);
static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
static int nexus_get_resource(device_t, device_t, int, int, u_long *,
u_long *);
static void nexus_delete_resource(device_t, device_t, int, int);
static int nexus_bind_intr(device_t, device_t, struct resource *, int);
static int nexus_config_intr(device_t, int, enum intr_trigger,
enum intr_polarity);
static int nexus_gettime(device_t, struct timespec *);
static int nexus_settime(device_t, struct timespec *);
static device_method_t nexus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_probe),
DEVMETHOD(device_attach, nexus_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* 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_adjust_resource, nexus_adjust_resource),
DEVMETHOD(bus_release_resource, nexus_release_resource),
DEVMETHOD(bus_activate_resource, nexus_activate_resource),
DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
DEVMETHOD(bus_setup_intr, nexus_setup_intr),
DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
DEVMETHOD(bus_set_resource, nexus_set_resource),
DEVMETHOD(bus_get_resource, nexus_get_resource),
DEVMETHOD(bus_delete_resource, nexus_delete_resource),
DEVMETHOD(bus_bind_intr, nexus_bind_intr),
DEVMETHOD(bus_config_intr, nexus_config_intr),
/* Clock interface */
DEVMETHOD(clock_gettime, nexus_gettime),
DEVMETHOD(clock_settime, nexus_settime),
{ 0, 0 }
};
static driver_t nexus_driver = {
"nexus",
nexus_methods,
1, /* no softc */
};
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
static int
nexus_probe(device_t dev)
{
device_quiet(dev); /* suppress attach message for neatness */
irq_rman.rm_type = RMAN_ARRAY;
irq_rman.rm_descr = "Interrupt request lines";
irq_rman.rm_start = 0;
irq_rman.rm_end = IA64_NXIVS - 1;
if (rman_init(&irq_rman)
|| rman_manage_region(&irq_rman,
irq_rman.rm_start, irq_rman.rm_end))
panic("nexus_probe irq_rman");
port_rman.rm_start = 0;
port_rman.rm_end = 0xffff;
port_rman.rm_type = RMAN_ARRAY;
port_rman.rm_descr = "I/O ports";
if (rman_init(&port_rman)
|| rman_manage_region(&port_rman, 0, 0xffff))
panic("nexus_probe port_rman");
mem_rman.rm_start = 0;
mem_rman.rm_end = ~0ul;
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, ~0))
panic("nexus_probe mem_rman");
return bus_generic_probe(dev);
}
static int
nexus_attach(device_t dev)
{
/*
* Mask the legacy PICs - we will use the I/O SAPIC for interrupt.
*/
outb(IO_ICU1+1, 0xff);
outb(IO_ICU2+1, 0xff);
if (acpi_identify() == 0)
BUS_ADD_CHILD(dev, 10, "acpi", 0);
clock_register(dev, 1000);
bus_generic_attach(dev);
return 0;
}
static int
nexus_print_child(device_t bus, device_t child)
{
struct nexus_device *ndev = DEVTONX(child);
struct resource_list *rl = &ndev->nx_resources;
int retval = 0;
retval += bus_print_child_header(bus, child);
retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
if (device_get_flags(child))
retval += printf(" flags %#x", device_get_flags(child));
retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
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);
}
static struct rman *
nexus_rman(int type)
{
switch (type) {
case SYS_RES_IRQ:
return (&irq_rman);
case SYS_RES_IOPORT:
return (&port_rman);
case SYS_RES_MEMORY:
return (&mem_rman);
default:
return (NULL);
}
}
/*
* 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 npx.)
*/
static struct resource *
nexus_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 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 ((start == 0UL) && (end == ~0UL) && (count == 1)) {
if (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;
}
flags &= ~RF_ACTIVE;
rm = nexus_rman(type);
if (rm == NULL)
return (NULL);
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == 0)
return 0;
rman_set_rid(rv, *rid);
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return 0;
}
}
return rv;
}
static int
nexus_adjust_resource(device_t bus, device_t child, int type,
struct resource *r, u_long start, u_long end)
{
struct rman *rm;
rm = nexus_rman(type);
if (rm == NULL)
return (ENXIO);
if (!rman_is_region_manager(r, rm))
return (EINVAL);
return (rman_adjust_resource(r, start, end));
}
static int
nexus_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
vm_paddr_t paddr;
void *vaddr;
paddr = rman_get_start(r);
switch (type) {
case SYS_RES_IOPORT:
rman_set_bustag(r, IA64_BUS_SPACE_IO);
rman_set_bushandle(r, paddr);
break;
case SYS_RES_MEMORY:
vaddr = pmap_mapdev(paddr, rman_get_size(r));
rman_set_bustag(r, IA64_BUS_SPACE_MEM);
rman_set_bushandle(r, (bus_space_handle_t) vaddr);
rman_set_virtual(r, vaddr);
break;
}
return (rman_activate_resource(r));
}
static int
nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (rman_deactivate_resource(r));
}
static int
nexus_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
if (rman_get_flags(r) & RF_ACTIVE) {
int error = bus_deactivate_resource(child, type, rid, r);
if (error)
return error;
}
return (rman_release_resource(r));
}
/*
* Currently this uses the really grody interface from kern/kern_intr.c
* (which really doesn't belong in kern/anything.c). Eventually, all of
* the code in kern_intr.c and machdep_intr.c should get moved here, since
* this is going to be the official interface.
*/
static int
nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
int flags, driver_filter_t filter, void (*ihand)(void *),
void *arg, void **cookiep)
{
driver_t *driver;
int error;
/* somebody tried to setup an irq that failed to allocate! */
if (irq == NULL)
panic("nexus_setup_intr: NULL irq resource!");
*cookiep = 0;
if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
flags |= INTR_EXCL;
driver = device_get_driver(child);
/*
* We depend here on rman_activate_resource() being idempotent.
*/
error = rman_activate_resource(irq);
if (error)
return (error);
error = ia64_setup_intr(device_get_nameunit(child),
rman_get_start(irq), filter, ihand, arg, flags, cookiep);
return (error);
}
static int
nexus_teardown_intr(device_t dev, device_t child, struct resource *ires,
void *cookie)
{
return (ia64_teardown_intr(cookie));
}
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,
u_long start, u_long count)
{
struct nexus_device *ndev = DEVTONX(child);
struct resource_list *rl = &ndev->nx_resources;
if (type == SYS_RES_IOPORT && start > (0x10000 - count)) {
/*
* Work around a firmware bug in the HP rx2660, where in ACPI
* an I/O port is really a memory mapped I/O address. The bug
* is in the GAS that describes the address and in particular
* the SpaceId field. The field should not say the address is
* an I/O port when it is in fact an I/O memory address.
*/
if (bootverbose)
printf("%s: invalid port range (%#lx-%#lx); "
"assuming I/O memory range.\n", __func__, start,
start + count - 1);
type = SYS_RES_MEMORY;
}
/* XXX this should return a success/failure indicator */
resource_list_add(rl, type, rid, start, start + count - 1, count);
return(0);
}
static int
nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
{
struct nexus_device *ndev = DEVTONX(child);
struct resource_list *rl = &ndev->nx_resources;
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
device_printf(child, "type %d rid %d startp %p countp %p - got %p\n",
type, rid, startp, countp, rle);
if (!rle)
return(ENOENT);
if (startp)
*startp = rle->start;
if (countp)
*countp = rle->count;
return(0);
}
static void
nexus_delete_resource(device_t dev, device_t child, int type, int rid)
{
struct nexus_device *ndev = DEVTONX(child);
struct resource_list *rl = &ndev->nx_resources;
resource_list_delete(rl, type, rid);
}
static int
nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
enum intr_polarity pol)
{
return (sapic_config_intr(irq, trig, pol));
}
static int
nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
{
struct pcpu *pc;
pc = cpuid_to_pcpu[cpu];
if (pc == NULL)
return (EINVAL);
return (sapic_bind_intr(rman_get_start(irq), pc));
}
static int
nexus_gettime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
struct efi_tm tm;
efi_get_time(&tm);
/*
* This code was written in 2005, so logically EFI cannot return
* a year smaller than that. Assume the EFI clock is out of whack
* in that case and reset the EFI clock.
*/
if (tm.tm_year < 2005)
return (EINVAL);
ct.nsec = tm.tm_nsec;
ct.sec = tm.tm_sec;
ct.min = tm.tm_min;
ct.hour = tm.tm_hour;
ct.day = tm.tm_mday;
ct.mon = tm.tm_mon;
ct.year = tm.tm_year;
ct.dow = -1;
return (clock_ct_to_ts(&ct, ts));
}
static int
nexus_settime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
struct efi_tm tm;
efi_get_time(&tm);
clock_ts_to_ct(ts, &ct);
tm.tm_nsec = ts->tv_nsec;
tm.tm_sec = ct.sec;
tm.tm_min = ct.min;
tm.tm_hour = ct.hour;
tm.tm_year = ct.year;
tm.tm_mon = ct.mon;
tm.tm_mday = ct.day;
return (efi_set_time(&tm));
}