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add mrsas_shutdown method

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It should be safer to flush controller and disk caches on the shutdown.
And to gracefully shut down the controller as well.
It seems that the Linux driver has been doing that for a long time.

Discussed with:	scottl
Reviewed by:	imp, Sumit Saxena <sumit.saxena@broadcom.com>
		(both earlier version)
MFC after:	3 weeks
Sponsored by:	Panzura
Differential Revision: https://reviews.freebsd.org/D19817
This commit is contained in:
Andriy Gapon 2019-05-23 12:51:13 +00:00
parent 56d0e33e7a
commit f28ecf2b63
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348159
1 changed files with 34 additions and 0 deletions
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34
sys/dev/mrsas/mrsas.c
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@ -1182,6 +1182,39 @@ mrsas_detach(device_t dev)
return (0);
}
static int
mrsas_shutdown(device_t dev)
{
struct mrsas_softc *sc;
int i;
sc = device_get_softc(dev);
sc->remove_in_progress = 1;
if (panicstr == NULL) {
if (sc->ocr_thread_active)
wakeup(&sc->ocr_chan);
i = 0;
while (sc->reset_in_progress && i < 15) {
i++;
if ((i % MRSAS_RESET_NOTICE_INTERVAL) == 0) {
mrsas_dprint(sc, MRSAS_INFO,
"[%2d]waiting for OCR to be finished "
"from %s\n", i, __func__);
}
pause("mr_shutdown", hz);
}
if (sc->reset_in_progress) {
mrsas_dprint(sc, MRSAS_INFO,
"gave up waiting for OCR to be finished\n");
}
}
mrsas_flush_cache(sc);
mrsas_shutdown_ctlr(sc, MR_DCMD_CTRL_SHUTDOWN);
mrsas_disable_intr(sc);
return (0);
}
/*
* mrsas_free_mem: Frees allocated memory
* input: Adapter instance soft state
@ -5028,6 +5061,7 @@ static device_method_t mrsas_methods[] = {
DEVMETHOD(device_probe, mrsas_probe),
DEVMETHOD(device_attach, mrsas_attach),
DEVMETHOD(device_detach, mrsas_detach),
DEVMETHOD(device_shutdown, mrsas_shutdown),
DEVMETHOD(device_suspend, mrsas_suspend),
DEVMETHOD(device_resume, mrsas_resume),
DEVMETHOD(bus_print_child, bus_generic_print_child),