diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index c6ebb176dc4..cbb44b7b9d6 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -318,7 +318,7 @@ static int xhci_abort_cmd_ring(struct xhci_hcd *xhci) * seconds), then it should assume that the there are * larger problems with the xHC and assert HCRST. */ - ret = handshake(xhci, &xhci->op_regs->cmd_ring, + ret = xhci_handshake(xhci, &xhci->op_regs->cmd_ring, CMD_RING_RUNNING, 0, 5 * 1000 * 1000); if (ret < 0) { xhci_err(xhci, "Stopped the command ring failed, " @@ -1228,6 +1228,17 @@ static void xhci_cmd_to_noop(struct xhci_hcd *xhci, struct xhci_cd *cur_cd) cur_seg = find_trb_seg(xhci->cmd_ring->first_seg, xhci->cmd_ring->dequeue, &cycle_state); + if (!cur_seg) { + xhci_warn(xhci, "Command ring mismatch, dequeue = %p %llx (dma)\n", + xhci->cmd_ring->dequeue, + (unsigned long long) + xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, + xhci->cmd_ring->dequeue)); + xhci_debug_ring(xhci, xhci->cmd_ring); + xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); + return; + } + /* find the command trb matched by cd from command ring */ for (cmd_trb = xhci->cmd_ring->dequeue; cmd_trb != xhci->cmd_ring->enqueue; @@ -3060,11 +3071,11 @@ static u32 xhci_td_remainder(unsigned int remainder) } /* - * For xHCI 1.0 host controllers, TD size is the number of packets remaining in - * the TD (*not* including this TRB). + * For xHCI 1.0 host controllers, TD size is the number of max packet sized + * packets remaining in the TD (*not* including this TRB). * * Total TD packet count = total_packet_count = - * roundup(TD size in bytes / wMaxPacketSize) + * DIV_ROUND_UP(TD size in bytes / wMaxPacketSize) * * Packets transferred up to and including this TRB = packets_transferred = * rounddown(total bytes transferred including this TRB / wMaxPacketSize) @@ -3072,15 +3083,16 @@ static u32 xhci_td_remainder(unsigned int remainder) * TD size = total_packet_count - packets_transferred * * It must fit in bits 21:17, so it can't be bigger than 31. + * The last TRB in a TD must have the TD size set to zero. */ - static u32 xhci_v1_0_td_remainder(int running_total, int trb_buff_len, - unsigned int total_packet_count, struct urb *urb) + unsigned int total_packet_count, struct urb *urb, + unsigned int num_trbs_left) { int packets_transferred; /* One TRB with a zero-length data packet. */ - if (running_total == 0 && trb_buff_len == 0) + if (num_trbs_left == 0 || (running_total == 0 && trb_buff_len == 0)) return 0; /* All the TRB queueing functions don't count the current TRB in @@ -3089,7 +3101,9 @@ static u32 xhci_v1_0_td_remainder(int running_total, int trb_buff_len, packets_transferred = (running_total + trb_buff_len) / usb_endpoint_maxp(&urb->ep->desc); - return xhci_td_remainder(total_packet_count - packets_transferred); + if ((total_packet_count - packets_transferred) > 31) + return 31 << 17; + return (total_packet_count - packets_transferred) << 17; } static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, @@ -3116,7 +3130,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, num_trbs = count_sg_trbs_needed(xhci, urb); num_sgs = urb->num_mapped_sgs; - total_packet_count = roundup(urb->transfer_buffer_length, + total_packet_count = DIV_ROUND_UP(urb->transfer_buffer_length, usb_endpoint_maxp(&urb->ep->desc)); trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id], @@ -3199,7 +3213,8 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, running_total); } else { remainder = xhci_v1_0_td_remainder(running_total, - trb_buff_len, total_packet_count, urb); + trb_buff_len, total_packet_count, urb, + num_trbs - 1); } length_field = TRB_LEN(trb_buff_len) | remainder | @@ -3307,7 +3322,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, start_cycle = ep_ring->cycle_state; running_total = 0; - total_packet_count = roundup(urb->transfer_buffer_length, + total_packet_count = DIV_ROUND_UP(urb->transfer_buffer_length, usb_endpoint_maxp(&urb->ep->desc)); /* How much data is in the first TRB? */ addr = (u64) urb->transfer_dma; @@ -3353,7 +3368,8 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, running_total); } else { remainder = xhci_v1_0_td_remainder(running_total, - trb_buff_len, total_packet_count, urb); + trb_buff_len, total_packet_count, urb, + num_trbs - 1); } length_field = TRB_LEN(trb_buff_len) | remainder | @@ -3616,7 +3632,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, addr = start_addr + urb->iso_frame_desc[i].offset; td_len = urb->iso_frame_desc[i].length; td_remain_len = td_len; - total_packet_count = roundup(td_len, + total_packet_count = DIV_ROUND_UP(td_len, usb_endpoint_maxp(&urb->ep->desc)); /* A zero-length transfer still involves at least one packet. */ if (total_packet_count == 0) @@ -3695,7 +3711,8 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, } else { remainder = xhci_v1_0_td_remainder( running_total, trb_buff_len, - total_packet_count, urb); + total_packet_count, urb, + (trbs_per_td - j - 1)); } length_field = TRB_LEN(trb_buff_len) | remainder | |