diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2011-05-31 12:23:13 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2011-06-23 11:28:06 +0200 |
| commit | adddecb169c63913786dcf3a5879e89a300dbb20 (patch) | |
| tree | 34c2ac35a87f170663a8afd0ae4559c2bab99a56 /hw | |
| parent | 16a2dee6b98ec0d4f60fa17f78ca989ce5c7f831 (diff) | |
| download | qemu-adddecb169c63913786dcf3a5879e89a300dbb20.zip qemu-adddecb169c63913786dcf3a5879e89a300dbb20.tar.gz qemu-adddecb169c63913786dcf3a5879e89a300dbb20.tar.bz2 | |
ehci: switch to nanoseconds
Make ehci use nanoseconds everywhere.
Simplifies time calculations.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/usb-ehci.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c index fa9792e..91fb7de 100644 --- a/hw/usb-ehci.c +++ b/hw/usb-ehci.c @@ -130,7 +130,7 @@ #define PORTSC_CONNECT (1 << 0) // Current Connect Status #define FRAME_TIMER_FREQ 1000 -#define FRAME_TIMER_USEC (1000000 / FRAME_TIMER_FREQ) +#define FRAME_TIMER_NS (1000000000 / FRAME_TIMER_FREQ) #define NB_MAXINTRATE 8 // Max rate at which controller issues ints #define NB_PORTS 4 // Number of downstream ports @@ -348,7 +348,8 @@ struct EHCIQueue { EHCIState *ehci; QTAILQ_ENTRY(EHCIQueue) next; bool async_schedule; - uint32_t seen, ts; + uint32_t seen; + uint64_t ts; /* cached data from guest - needs to be flushed * when guest removes an entry (doorbell, handshake sequence) @@ -418,12 +419,11 @@ struct EHCIState { uint8_t ibuffer[BUFF_SIZE]; int isoch_pause; - uint32_t last_run_usec; - uint32_t frame_end_usec; + uint64_t last_run_ns; }; #define SET_LAST_RUN_CLOCK(s) \ - (s)->last_run_usec = qemu_get_clock_ns(vm_clock) / 1000; + (s)->last_run_ns = qemu_get_clock_ns(vm_clock); /* nifty macros from Arnon's EHCI version */ #define get_field(data, field) \ @@ -690,10 +690,10 @@ static void ehci_queues_rip_unused(EHCIState *ehci) QTAILQ_FOREACH_SAFE(q, &ehci->queues, next, tmp) { if (q->seen) { q->seen = 0; - q->ts = ehci->last_run_usec; + q->ts = ehci->last_run_ns; continue; } - if (ehci->last_run_usec < q->ts + 250000) { + if (ehci->last_run_ns < q->ts + 250000000) { /* allow 0.25 sec idle */ continue; } @@ -2045,23 +2045,16 @@ static void ehci_frame_timer(void *opaque) { EHCIState *ehci = opaque; int64_t expire_time, t_now; - int usec_elapsed; + uint64_t ns_elapsed; int frames; - int usec_now; int i; int skipped_frames = 0; - t_now = qemu_get_clock_ns(vm_clock); expire_time = t_now + (get_ticks_per_sec() / ehci->freq); - if (expire_time == t_now) { - expire_time++; - } - usec_now = t_now / 1000; - usec_elapsed = usec_now - ehci->last_run_usec; - frames = usec_elapsed / FRAME_TIMER_USEC; - ehci->frame_end_usec = usec_now + FRAME_TIMER_USEC - 10; + ns_elapsed = t_now - ehci->last_run_ns; + frames = ns_elapsed / FRAME_TIMER_NS; for (i = 0; i < frames; i++) { if ( !(ehci->usbsts & USBSTS_HALT)) { @@ -2084,7 +2077,7 @@ static void ehci_frame_timer(void *opaque) ehci_advance_periodic_state(ehci); } - ehci->last_run_usec += FRAME_TIMER_USEC; + ehci->last_run_ns += FRAME_TIMER_NS; } #if 0 |