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AHCI Port Interrupt Enable register cleaning on soft reset 

I've found that FreeBSD AHCI driver doesn't work with AHCI hardware
emulation of QEMU 0.15.0. I believe the problem is on QEMU's side. As I
see, it clears port's Interrupt Enable register each time when reset of
any level happens. Is is reasonable for the global controller reset. It
is probably not good, but acceptable for FreeBSD driver for the port
hard reset. But it is IMO wrong for the device soft reset. None of real
hardware I know behaves that way.

Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alexander Motin 2011-09-12 11:19:25 +03:00 committed by Kevin Wolf
parent 21cfa41e91
commit a26a13da68
1 changed files with 5 additions and 3 deletions
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8
hw/ide/ahci.c
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@ -499,10 +499,7 @@ static void ahci_reset_port(AHCIState *s, int port)
ide_bus_reset(&d->port);
ide_state->ncq_queues = AHCI_MAX_CMDS;
pr->irq_stat = 0;
pr->irq_mask = 0;
pr->scr_stat = 0;
pr->scr_ctl = 0;
pr->scr_err = 0;
pr->scr_act = 0;
d->busy_slot = -1;
@ -1159,12 +1156,17 @@ void ahci_uninit(AHCIState *s)
void ahci_reset(void *opaque)
{
struct AHCIPCIState *d = opaque;
AHCIPortRegs *pr;
int i;
d->ahci.control_regs.irqstatus = 0;
d->ahci.control_regs.ghc = 0;
for (i = 0; i < d->ahci.ports; i++) {
pr = &d->ahci.dev[i].port_regs;
pr->irq_stat = 0;
pr->irq_mask = 0;
pr->scr_ctl = 0;
ahci_reset_port(&d->ahci, i);
}
}