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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-01-16 11:56:32 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-07 15:44:37 -0800 |
| commit | 3ca2a3211ee5078d49b04fe7149ff2a76473be51 (patch) | |
| tree | 53f6df56c8d24c7750fced8aca7678867bdfc63d /drivers/usb/host/uhci-hcd.h | |
| parent | 6a6c957eba20814456bc4bffbd4ec42406f9eb02 (diff) | |
| download | lwn-3ca2a3211ee5078d49b04fe7149ff2a76473be51.tar.gz lwn-3ca2a3211ee5078d49b04fe7149ff2a76473be51.zip | |
UHCI: fix bandwidth allocation
This patch (as840) fixes the bandwidth allocation mechanism in
uhci-hcd. It has never worked correctly.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/uhci-hcd.h')
| -rw-r--r-- | drivers/usb/host/uhci-hcd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h index 108e3de2dc26..74469b5bcb61 100644 --- a/drivers/usb/host/uhci-hcd.h +++ b/drivers/usb/host/uhci-hcd.h @@ -83,6 +83,7 @@ #define UHCI_MAX_SOF_NUMBER 2047 /* in an SOF packet */ #define CAN_SCHEDULE_FRAMES 1000 /* how far in the future frames * can be scheduled */ +#define MAX_PHASE 32 /* Periodic scheduling length */ /* When no queues need Full-Speed Bandwidth Reclamation, * delay this long before turning FSBR off */ @@ -141,6 +142,8 @@ struct uhci_qh { unsigned long advance_jiffies; /* Time of last queue advance */ unsigned int unlink_frame; /* When the QH was unlinked */ unsigned int period; /* For Interrupt and Isochronous QHs */ + short phase; /* Between 0 and period-1 */ + short load; /* Periodic time requirement, in us */ unsigned int iso_frame; /* Frame # for iso_packet_desc */ int iso_status; /* Status for Isochronous URBs */ @@ -153,6 +156,8 @@ struct uhci_qh { unsigned int needs_fixup:1; /* Must fix the TD toggle values */ unsigned int is_stopped:1; /* Queue was stopped by error/unlink */ unsigned int wait_expired:1; /* QH_WAIT_TIMEOUT has expired */ + unsigned int bandwidth_reserved:1; /* Periodic bandwidth has + * been allocated */ } __attribute__((aligned(16))); /* @@ -414,6 +419,9 @@ struct uhci_hcd { wait_queue_head_t waitqh; /* endpoint_disable waiters */ int num_waiting; /* Number of waiters */ + + int total_load; /* Sum of array values */ + short load[MAX_PHASE]; /* Periodic allocations */ }; /* Convert between a usb_hcd pointer and the corresponding uhci_hcd */ |