From 37a8b9205f1a6fef0893d5b5c62178ea2a6bfde3 Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Sat, 2 Mar 2024 22:44:53 +0100 Subject: hw/scsi/lsi53c895a: stop script on phase mismatch Netbsd isn't happy with qemu lsi53c895a emulation: cd0(esiop0:0:2:0): command with tag id 0 reset esiop0: autoconfiguration error: phase mismatch without command esiop0: autoconfiguration error: unhandled scsi interrupt, sist=0x80 sstat1=0x0 DSA=0x23a64b1 DSP=0x50 This is because lsi_bad_phase() triggers a phase mismatch, which stops SCRIPT processing. However, after returning to lsi_command_complete(), SCRIPT is restarted with lsi_resume_script(). Fix this by adding a return value to lsi_bad_phase(), and only resume script processing when lsi_bad_phase() didn't trigger a host interrupt. Signed-off-by: Sven Schnelle Tested-by: Helge Deller Message-ID: <20240302214453.2071388-1-svens@stackframe.org> Signed-off-by: Paolo Bonzini (cherry picked from commit a9198b3132d81a6bfc9fdbf6f3d3a514c2864674) Signed-off-by: Michael Tokarev --- hw/scsi/lsi53c895a.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index afbea0fefa..46c17b320e 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -570,8 +570,9 @@ static inline void lsi_set_phase(LSIState *s, int phase) s->sstat1 = (s->sstat1 & ~PHASE_MASK) | phase; } -static void lsi_bad_phase(LSIState *s, int out, int new_phase) +static int lsi_bad_phase(LSIState *s, int out, int new_phase) { + int ret = 0; /* Trigger a phase mismatch. */ if (s->ccntl0 & LSI_CCNTL0_ENPMJ) { if ((s->ccntl0 & LSI_CCNTL0_PMJCTL)) { @@ -584,8 +585,10 @@ static void lsi_bad_phase(LSIState *s, int out, int new_phase) trace_lsi_bad_phase_interrupt(); lsi_script_scsi_interrupt(s, LSI_SIST0_MA, 0); lsi_stop_script(s); + ret = 1; } lsi_set_phase(s, new_phase); + return ret; } @@ -789,7 +792,7 @@ static int lsi_queue_req(LSIState *s, SCSIRequest *req, uint32_t len) static void lsi_command_complete(SCSIRequest *req, size_t resid) { LSIState *s = LSI53C895A(req->bus->qbus.parent); - int out; + int out, stop = 0; out = (s->sstat1 & PHASE_MASK) == PHASE_DO; trace_lsi_command_complete(req->status); @@ -797,7 +800,10 @@ static void lsi_command_complete(SCSIRequest *req, size_t resid) s->command_complete = 2; if (s->waiting && s->dbc != 0) { /* Raise phase mismatch for short transfers. */ - lsi_bad_phase(s, out, PHASE_ST); + stop = lsi_bad_phase(s, out, PHASE_ST); + if (stop) { + s->waiting = 0; + } } else { lsi_set_phase(s, PHASE_ST); } @@ -807,7 +813,9 @@ static void lsi_command_complete(SCSIRequest *req, size_t resid) lsi_request_free(s, s->current); scsi_req_unref(req); } - lsi_resume_script(s); + if (!stop) { + lsi_resume_script(s); + } } /* Callback to indicate that the SCSI layer has completed a transfer. */ -- cgit v1.2.3