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-rw-r--r--drivers/usb/host/xhci-ring.c76
1 files changed, 70 insertions, 6 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 766f6a615b2..27d690d889a 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2655,6 +2655,35 @@ static u32 xhci_td_remainder(unsigned int remainder)
return (remainder >> 10) << 17;
}
+/*
+ * For xHCI 1.0 host controllers, TD size is the number of packets remaining in
+ * the TD (*not* including this TRB).
+ *
+ * Total TD packet count = total_packet_count =
+ * roundup(TD size in bytes / wMaxPacketSize)
+ *
+ * Packets transferred up to and including this TRB = packets_transferred =
+ * rounddown(total bytes transferred including this TRB / wMaxPacketSize)
+ *
+ * TD size = total_packet_count - packets_transferred
+ *
+ * It must fit in bits 21:17, so it can't be bigger than 31.
+ */
+
+static u32 xhci_v1_0_td_remainder(int running_total, int trb_buff_len,
+ unsigned int total_packet_count, struct urb *urb)
+{
+ int packets_transferred;
+
+ /* All the TRB queueing functions don't count the current TRB in
+ * running_total.
+ */
+ packets_transferred = (running_total + trb_buff_len) /
+ le16_to_cpu(urb->ep->desc.wMaxPacketSize);
+
+ return xhci_td_remainder(total_packet_count - packets_transferred);
+}
+
static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
struct urb *urb, int slot_id, unsigned int ep_index)
{
@@ -2665,6 +2694,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
struct scatterlist *sg;
int num_sgs;
int trb_buff_len, this_sg_len, running_total;
+ unsigned int total_packet_count;
bool first_trb;
u64 addr;
bool more_trbs_coming;
@@ -2678,6 +2708,8 @@ 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_sgs;
+ total_packet_count = roundup(urb->transfer_buffer_length,
+ le16_to_cpu(urb->ep->desc.wMaxPacketSize));
trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id],
ep_index, urb->stream_id,
@@ -2758,11 +2790,20 @@ 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);
}
- remainder = xhci_td_remainder(urb->transfer_buffer_length -
- running_total) ;
+
+ /* Set the TRB length, TD size, and interrupter fields. */
+ if (xhci->hci_version < 0x100) {
+ remainder = xhci_td_remainder(
+ urb->transfer_buffer_length -
+ running_total);
+ } else {
+ remainder = xhci_v1_0_td_remainder(running_total,
+ trb_buff_len, total_packet_count, urb);
+ }
length_field = TRB_LEN(trb_buff_len) |
remainder |
TRB_INTR_TARGET(0);
+
if (num_trbs > 1)
more_trbs_coming = true;
else
@@ -2819,6 +2860,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
u32 field, length_field;
int running_total, trb_buff_len, ret;
+ unsigned int total_packet_count;
u64 addr;
if (urb->num_sgs)
@@ -2873,6 +2915,8 @@ 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,
+ le16_to_cpu(urb->ep->desc.wMaxPacketSize));
/* How much data is in the first TRB? */
addr = (u64) urb->transfer_dma;
trb_buff_len = TRB_MAX_BUFF_SIZE -
@@ -2910,11 +2954,19 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
if (usb_urb_dir_in(urb))
field |= TRB_ISP;
- remainder = xhci_td_remainder(urb->transfer_buffer_length -
- running_total);
+ /* Set the TRB length, TD size, and interrupter fields. */
+ if (xhci->hci_version < 0x100) {
+ remainder = xhci_td_remainder(
+ urb->transfer_buffer_length -
+ running_total);
+ } else {
+ remainder = xhci_v1_0_td_remainder(running_total,
+ trb_buff_len, total_packet_count, urb);
+ }
length_field = TRB_LEN(trb_buff_len) |
remainder |
TRB_INTR_TARGET(0);
+
if (num_trbs > 1)
more_trbs_coming = true;
else
@@ -3111,12 +3163,15 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
/* Queue the first TRB, even if it's zero-length */
for (i = 0; i < num_tds; i++) {
- first_trb = true;
+ unsigned int total_packet_count;
+ first_trb = true;
running_total = 0;
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,
+ le16_to_cpu(urb->ep->desc.wMaxPacketSize));
trbs_per_td = count_isoc_trbs_needed(xhci, urb, i);
@@ -3172,10 +3227,19 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
if (trb_buff_len > td_remain_len)
trb_buff_len = td_remain_len;
- remainder = xhci_td_remainder(td_len - running_total);
+ /* Set the TRB length, TD size, & interrupter fields. */
+ if (xhci->hci_version < 0x100) {
+ remainder = xhci_td_remainder(
+ td_len - running_total);
+ } else {
+ remainder = xhci_v1_0_td_remainder(
+ running_total, trb_buff_len,
+ total_packet_count, urb);
+ }
length_field = TRB_LEN(trb_buff_len) |
remainder |
TRB_INTR_TARGET(0);
+
queue_trb(xhci, ep_ring, false, more_trbs_coming,
lower_32_bits(addr),
upper_32_bits(addr),