From f9dc68fe7ad390428c6bc5d7ff582cdb5d92fcb8 Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Mon, 27 Jul 2009 12:03:07 -0700 Subject: [PATCH] USB: xhci: Set TD size in transfer TRB. The 0.95 xHCI specification requires software to set the "TD size" field in each transaction request block (TRB). This field gives the host controller an indication of how much data is remaining in the TD (including the buffer in the current TRB). Set this field in bulk TRBs and data stage TRBs for control transfers. Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 02d81985c454..d5b952997423 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1285,6 +1285,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, /* Queue the first TRB, even if it's zero-length */ do { u32 field = 0; + u32 length_field = 0; /* Don't change the cycle bit of the first TRB until later */ if (first_trb) @@ -1314,10 +1315,13 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, (unsigned int) (addr + TRB_MAX_BUFF_SIZE) & ~(TRB_MAX_BUFF_SIZE - 1), (unsigned int) addr + trb_buff_len); } + length_field = TRB_LEN(trb_buff_len) | + TD_REMAINDER(urb->transfer_buffer_length - running_total) | + TRB_INTR_TARGET(0); queue_trb(xhci, ep_ring, false, (u32) addr, (u32) ((u64) addr >> 32), - TRB_LEN(trb_buff_len) | TRB_INTR_TARGET(0), + length_field, /* We always want to know if the TRB was short, * or we won't get an event when it completes. * (Unless we use event data TRBs, which are a @@ -1365,7 +1369,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct xhci_generic_trb *start_trb; bool first_trb; int start_cycle; - u32 field; + u32 field, length_field; int running_total, trb_buff_len, ret; u64 addr; @@ -1443,10 +1447,13 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, td->last_trb = ep_ring->enqueue; field |= TRB_IOC; } + length_field = TRB_LEN(trb_buff_len) | + TD_REMAINDER(urb->transfer_buffer_length - running_total) | + TRB_INTR_TARGET(0); queue_trb(xhci, ep_ring, false, (u32) addr, (u32) ((u64) addr >> 32), - TRB_LEN(trb_buff_len) | TRB_INTR_TARGET(0), + length_field, /* We always want to know if the TRB was short, * or we won't get an event when it completes. * (Unless we use event data TRBs, which are a @@ -1478,7 +1485,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct usb_ctrlrequest *setup; struct xhci_generic_trb *start_trb; int start_cycle; - u32 field; + u32 field, length_field; struct xhci_td *td; ep_ring = xhci->devs[slot_id]->ep_rings[ep_index]; @@ -1528,13 +1535,16 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, /* If there's data, queue data TRBs */ field = 0; + length_field = TRB_LEN(urb->transfer_buffer_length) | + TD_REMAINDER(urb->transfer_buffer_length) | + TRB_INTR_TARGET(0); if (urb->transfer_buffer_length > 0) { if (setup->bRequestType & USB_DIR_IN) field |= TRB_DIR_IN; queue_trb(xhci, ep_ring, false, lower_32_bits(urb->transfer_dma), upper_32_bits(urb->transfer_dma), - TRB_LEN(urb->transfer_buffer_length) | TRB_INTR_TARGET(0), + length_field, /* Event on short tx */ field | TRB_ISP | TRB_TYPE(TRB_DATA) | ep_ring->cycle_state); } -- 2.20.1