diff options
Diffstat (limited to 'drivers/usb/host/uhci-hcd.h')
| -rw-r--r-- | drivers/usb/host/uhci-hcd.h | 81 |
1 files changed, 34 insertions, 47 deletions
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h index d5c8f4d92823..108e3de2dc26 100644 --- a/drivers/usb/host/uhci-hcd.h +++ b/drivers/usb/host/uhci-hcd.h @@ -84,6 +84,13 @@ #define CAN_SCHEDULE_FRAMES 1000 /* how far in the future frames * can be scheduled */ +/* When no queues need Full-Speed Bandwidth Reclamation, + * delay this long before turning FSBR off */ +#define FSBR_OFF_DELAY msecs_to_jiffies(10) + +/* If a queue hasn't advanced after this much time, assume it is stuck */ +#define QH_WAIT_TIMEOUT msecs_to_jiffies(200) + /* * Queue Headers @@ -121,21 +128,31 @@ struct uhci_qh { __le32 element; /* Queue element (TD) pointer */ /* Software fields */ - dma_addr_t dma_handle; - struct list_head node; /* Node in the list of QHs */ struct usb_host_endpoint *hep; /* Endpoint information */ struct usb_device *udev; struct list_head queue; /* Queue of urbps for this QH */ struct uhci_qh *skel; /* Skeleton for this QH */ struct uhci_td *dummy_td; /* Dummy TD to end the queue */ + struct uhci_td *post_td; /* Last TD completed */ + struct usb_iso_packet_descriptor *iso_packet_desc; + /* Next urb->iso_frame_desc entry */ + 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 */ + unsigned int iso_frame; /* Frame # for iso_packet_desc */ + int iso_status; /* Status for Isochronous URBs */ + int state; /* QH_STATE_xxx; see above */ + int type; /* Queue type (control, bulk, etc) */ + + dma_addr_t dma_handle; unsigned int initial_toggle:1; /* Endpoint's current toggle value */ unsigned int needs_fixup:1; /* Must fix the TD toggle values */ - unsigned int is_stopped:1; /* Queue was stopped by an error */ + unsigned int is_stopped:1; /* Queue was stopped by error/unlink */ + unsigned int wait_expired:1; /* QH_WAIT_TIMEOUT has expired */ } __attribute__((aligned(16))); /* @@ -226,7 +243,6 @@ struct uhci_td { dma_addr_t dma_handle; struct list_head list; - struct list_head remove_list; int frame; /* for iso: what frame? */ struct list_head fl_list; @@ -305,38 +321,8 @@ static inline u32 td_status(struct uhci_td *td) { #define skel_bulk_qh skelqh[12] #define skel_term_qh skelqh[13] -/* - * Search tree for determining where <interval> fits in the skelqh[] - * skeleton. - * - * An interrupt request should be placed into the slowest skelqh[] - * which meets the interval/period/frequency requirement. - * An interrupt request is allowed to be faster than <interval> but not slower. - * - * For a given <interval>, this function returns the appropriate/matching - * skelqh[] index value. - */ -static inline int __interval_to_skel(int interval) -{ - if (interval < 16) { - if (interval < 4) { - if (interval < 2) - return 9; /* int1 for 0-1 ms */ - return 8; /* int2 for 2-3 ms */ - } - if (interval < 8) - return 7; /* int4 for 4-7 ms */ - return 6; /* int8 for 8-15 ms */ - } - if (interval < 64) { - if (interval < 32) - return 5; /* int16 for 16-31 ms */ - return 4; /* int32 for 32-63 ms */ - } - if (interval < 128) - return 3; /* int64 for 64-127 ms */ - return 2; /* int128 for 128-255 ms (Max.) */ -} +/* Find the skelqh entry corresponding to an interval exponent */ +#define UHCI_SKEL_INDEX(exponent) (9 - exponent) /* @@ -396,32 +382,32 @@ struct uhci_hcd { __le32 *frame; void **frame_cpu; /* CPU's frame list */ - int fsbr; /* Full-speed bandwidth reclamation */ - unsigned long fsbrtimeout; /* FSBR delay */ - enum uhci_rh_state rh_state; unsigned long auto_stop_time; /* When to AUTO_STOP */ unsigned int frame_number; /* As of last check */ unsigned int is_stopped; #define UHCI_IS_STOPPED 9999 /* Larger than a frame # */ + unsigned int last_iso_frame; /* Frame of last scan */ + unsigned int cur_iso_frame; /* Frame for current scan */ unsigned int scan_in_progress:1; /* Schedule scan is running */ unsigned int need_rescan:1; /* Redo the schedule scan */ - unsigned int hc_inaccessible:1; /* HC is suspended or dead */ + unsigned int dead:1; /* Controller has died */ unsigned int working_RD:1; /* Suspended root hub doesn't need to be polled */ unsigned int is_initialized:1; /* Data structure is usable */ + unsigned int fsbr_is_on:1; /* FSBR is turned on */ + unsigned int fsbr_is_wanted:1; /* Does any URB want FSBR? */ + unsigned int fsbr_expiring:1; /* FSBR is timing out */ + + struct timer_list fsbr_timer; /* For turning off FBSR */ /* Support for port suspend/resume/reset */ unsigned long port_c_suspend; /* Bit-arrays of ports */ unsigned long resuming_ports; unsigned long ports_timeout; /* Time to stop signalling */ - /* List of TDs that are done, but waiting to be freed (race) */ - struct list_head td_remove_list; - unsigned int td_remove_age; /* Age in frames */ - struct list_head idle_qh_list; /* Where the idle QHs live */ int rh_numports; /* Number of root-hub ports */ @@ -442,6 +428,9 @@ static inline struct usb_hcd *uhci_to_hcd(struct uhci_hcd *uhci) #define uhci_dev(u) (uhci_to_hcd(u)->self.controller) +/* Utility macro for comparing frame numbers */ +#define uhci_frame_before_eq(f1, f2) (0 <= (int) ((f2) - (f1))) + /* * Private per-URB data @@ -454,9 +443,7 @@ struct urb_priv { struct uhci_qh *qh; /* QH for this URB */ struct list_head td_list; - unsigned fsbr : 1; /* URB turned on FSBR */ - unsigned short_transfer : 1; /* URB got a short transfer, no - * need to rescan */ + unsigned fsbr:1; /* URB wants FSBR */ }; |