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authorAlan Stern <stern@rowland.harvard.edu>2007-01-16 19:56:32 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-08 02:44:37 +0300
commit3ca2a3211ee5078d49b04fe7149ff2a76473be51 (patch)
tree53f6df56c8d24c7750fced8aca7678867bdfc63d /drivers/usb/host/uhci-hcd.h
parent6a6c957eba20814456bc4bffbd4ec42406f9eb02 (diff)
downloadlinux-3ca2a3211ee5078d49b04fe7149ff2a76473be51.tar.xz
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.h8
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 */