diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/xhci.c | 69 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 3 |
2 files changed, 67 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 7583b24c338..54cb762d15c 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1810,6 +1810,22 @@ static int xhci_check_tt_bw_table(struct xhci_hcd *xhci, return 0; } +static int xhci_check_ss_bw(struct xhci_hcd *xhci, + struct xhci_virt_device *virt_dev) +{ + unsigned int bw_reserved; + + bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_IN, 100); + if (virt_dev->bw_table->ss_bw_in > (SS_BW_LIMIT_IN - bw_reserved)) + return -ENOMEM; + + bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_OUT, 100); + if (virt_dev->bw_table->ss_bw_out > (SS_BW_LIMIT_OUT - bw_reserved)) + return -ENOMEM; + + return 0; +} + /* * This algorithm is a very conservative estimate of the worst-case scheduling * scenario for any one interval. The hardware dynamically schedules the @@ -1866,6 +1882,9 @@ static int xhci_check_bw_table(struct xhci_hcd *xhci, unsigned int packets_remaining = 0; unsigned int i; + if (virt_dev->udev->speed == USB_SPEED_SUPER) + return xhci_check_ss_bw(xhci, virt_dev); + if (virt_dev->udev->speed == USB_SPEED_HIGH) { max_bandwidth = HS_BW_LIMIT; /* Convert percent of bus BW reserved to blocks reserved */ @@ -2028,6 +2047,25 @@ static bool xhci_is_async_ep(unsigned int ep_type) ep_type != INT_IN_EP); } +static bool xhci_is_sync_in_ep(unsigned int ep_type) +{ + return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP); +} + +static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) +{ + unsigned int mps = DIV_ROUND_UP(ep_bw->max_packet_size, SS_BLOCK); + + if (ep_bw->ep_interval == 0) + return SS_OVERHEAD_BURST + + (ep_bw->mult * ep_bw->num_packets * + (SS_OVERHEAD + mps)); + return DIV_ROUND_UP(ep_bw->mult * ep_bw->num_packets * + (SS_OVERHEAD + mps + SS_OVERHEAD_BURST), + 1 << ep_bw->ep_interval); + +} + void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci, struct xhci_bw_info *ep_bw, struct xhci_interval_bw_table *bw_table, @@ -2038,10 +2076,24 @@ void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci, struct xhci_interval_bw *interval_bw; int normalized_interval; - if (xhci_is_async_ep(ep_bw->type) || - list_empty(&virt_ep->bw_endpoint_list)) + if (xhci_is_async_ep(ep_bw->type)) return; + if (udev->speed == USB_SPEED_SUPER) { + if (xhci_is_sync_in_ep(ep_bw->type)) + xhci->devs[udev->slot_id]->bw_table->ss_bw_in -= + xhci_get_ss_bw_consumed(ep_bw); + else + xhci->devs[udev->slot_id]->bw_table->ss_bw_out -= + xhci_get_ss_bw_consumed(ep_bw); + return; + } + + /* SuperSpeed endpoints never get added to intervals in the table, so + * this check is only valid for HS/FS/LS devices. + */ + if (list_empty(&virt_ep->bw_endpoint_list)) + return; /* For LS/FS devices, we need to translate the interval expressed in * microframes to frames. */ @@ -2091,6 +2143,16 @@ static void xhci_add_ep_to_interval_table(struct xhci_hcd *xhci, if (xhci_is_async_ep(ep_bw->type)) return; + if (udev->speed == USB_SPEED_SUPER) { + if (xhci_is_sync_in_ep(ep_bw->type)) + xhci->devs[udev->slot_id]->bw_table->ss_bw_in += + xhci_get_ss_bw_consumed(ep_bw); + else + xhci->devs[udev->slot_id]->bw_table->ss_bw_out += + xhci_get_ss_bw_consumed(ep_bw); + return; + } + /* For LS/FS devices, we need to translate the interval expressed in * microframes to frames. */ @@ -2169,9 +2231,6 @@ static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, struct xhci_input_control_ctx *ctrl_ctx; int old_active_eps = 0; - if (virt_dev->udev->speed == USB_SPEED_SUPER) - return 0; - if (virt_dev->tt_info) old_active_eps = virt_dev->tt_info->active_eps; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 752a500f869..2882074eb2c 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -799,6 +799,7 @@ struct xhci_bw_info { /* Percentage of bus bandwidth reserved for non-periodic transfers */ #define FS_BW_RESERVED 10 #define HS_BW_RESERVED 20 +#define SS_BW_RESERVED 10 struct xhci_virt_ep { struct xhci_ring *ring; @@ -869,6 +870,8 @@ struct xhci_interval_bw_table { struct xhci_interval_bw interval_bw[XHCI_MAX_INTERVAL]; /* Includes reserved bandwidth for async endpoints */ unsigned int bw_used; + unsigned int ss_bw_in; + unsigned int ss_bw_out; }; |