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hyperv/et: Make Hyper-V event timer a device.

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Submitted by:	Jun Su <junsu microsoft com>
Reviewed by:	sephe, Dexuan Cui <decui microsoft com>
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D5957
This commit is contained in:
Sepherosa Ziehau 2016-04-22 05:15:59 +00:00
parent f517a30206
commit d1c801bbf1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=298449
3 changed files with 67 additions and 35 deletions
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96
sys/dev/hyperv/vmbus/hv_et.c
View File

@ -28,6 +28,9 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/smp.h>
@ -40,8 +43,7 @@ __FBSDID("$FreeBSD$");
#define HV_MAX_DELTA_TICKS 0xffffffffLL
#define HV_MIN_DELTA_TICKS 1LL
static struct eventtimer et;
static uint64_t periodticks[MAXCPU];
static struct eventtimer *et;
static inline uint64_t
sbintime2tick(sbintime_t time)
@ -62,10 +64,6 @@ hv_et_start(struct eventtimer *et, sbintime_t firsttime, sbintime_t periodtime)
timer_cfg.auto_enable = 1;
timer_cfg.sintx = HV_VMBUS_TIMER_SINT;
periodticks[curcpu] = sbintime2tick(periodtime);
if (firsttime == 0)
firsttime = periodtime;
current = rdmsr(HV_X64_MSR_TIME_REF_COUNT);
current += sbintime2tick(firsttime);
@ -87,45 +85,77 @@ hv_et_stop(struct eventtimer *et)
void
hv_et_intr(struct trapframe *frame)
{
union hv_timer_config timer_cfg;
struct trapframe *oldframe;
struct thread *td;
if (periodticks[curcpu] != 0) {
uint64_t tick = sbintime2tick(periodticks[curcpu]);
timer_cfg.as_uint64 = rdmsr(HV_X64_MSR_STIMER0_CONFIG);
timer_cfg.enable = 0;
timer_cfg.auto_enable = 1;
timer_cfg.periodic = 1;
periodticks[curcpu] = 0;
wrmsr(HV_X64_MSR_STIMER0_CONFIG, timer_cfg.as_uint64);
wrmsr(HV_X64_MSR_STIMER0_COUNT, tick);
}
if (et.et_active) {
if (et->et_active) {
td = curthread;
td->td_intr_nesting_level++;
oldframe = td->td_intr_frame;
td->td_intr_frame = frame;
et.et_event_cb(&et, et.et_arg);
et->et_event_cb(et, et->et_arg);
td->td_intr_frame = oldframe;
td->td_intr_nesting_level--;
}
}
void
hv_et_init(void)
static void
hv_et_identify (driver_t *driver, device_t parent)
{
et.et_name = "HyperV";
et.et_flags = ET_FLAGS_ONESHOT | ET_FLAGS_PERCPU | ET_FLAGS_PERIODIC;
et.et_quality = 1000;
et.et_frequency = HV_TIMER_FREQUENCY;
et.et_min_period = (1LL << 32) / HV_TIMER_FREQUENCY;
et.et_max_period = HV_MAX_DELTA_TICKS * ((1LL << 32) / HV_TIMER_FREQUENCY);
et.et_start = hv_et_start;
et.et_stop = hv_et_stop;
et.et_priv = &et;
et_register(&et);
if (device_find_child(parent, "hv_et", -1) != NULL)
return;
device_add_child(parent, "hv_et", -1);
}
static int
hv_et_probe(device_t dev)
{
device_set_desc(dev, "Hyper-V event timer");
return (BUS_PROBE_NOWILDCARD);
}
static int
hv_et_attach(device_t dev)
{
/* XXX: need allocate SINT and remove global et */
et = device_get_softc(dev);
et->et_name = "Hyper-V";
et->et_flags = ET_FLAGS_ONESHOT | ET_FLAGS_PERCPU;
et->et_quality = 1000;
et->et_frequency = HV_TIMER_FREQUENCY;
et->et_min_period = HV_MIN_DELTA_TICKS * ((1LL << 32) / HV_TIMER_FREQUENCY);
et->et_max_period = HV_MAX_DELTA_TICKS * ((1LL << 32) / HV_TIMER_FREQUENCY);
et->et_start = hv_et_start;
et->et_stop = hv_et_stop;
et->et_priv = dev;
return (et_register(et));
}
static int
hv_et_detach(device_t dev)
{
return (et_deregister(et));
}
static device_method_t hv_et_methods[] = {
DEVMETHOD(device_identify, hv_et_identify),
DEVMETHOD(device_probe, hv_et_probe),
DEVMETHOD(device_attach, hv_et_attach),
DEVMETHOD(device_detach, hv_et_detach),
DEVMETHOD_END
};
static driver_t hv_et_driver = {
"hv_et",
hv_et_methods,
sizeof(struct eventtimer)
};
static devclass_t hv_et_devclass;
DRIVER_MODULE(hv_et, vmbus, hv_et_driver, hv_et_devclass, NULL, 0);
MODULE_VERSION(hv_et, 1);

2
sys/dev/hyperv/vmbus/hv_hv.c
View File

@ -171,8 +171,6 @@ hv_vmbus_init(void)
hv_vmbus_g_context.hypercall_page = virt_addr;
hv_et_init();
return (0);
cleanup:

4
sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c
View File

@ -277,6 +277,9 @@ vmbus_child_pnpinfo_str(device_t dev, device_t child, char *buf, size_t buflen)
char guidbuf[40];
struct hv_device *dev_ctx = device_get_ivars(child);
if (dev_ctx == NULL)
return (0);
strlcat(buf, "classid=", buflen);
snprintf_hv_guid(guidbuf, sizeof(guidbuf), &dev_ctx->class_id);
strlcat(buf, guidbuf, buflen);
@ -525,6 +528,7 @@ vmbus_attach(device_t dev)
if (!cold)
vmbus_bus_init();
bus_generic_probe(dev);
return (0);
}