diff options
| -rw-r--r-- | payloads/libpayload/drivers/usb/xhci.c | 19 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/usb/xhci_private.h | 3 |
2 files changed, 13 insertions, 9 deletions
diff --git a/payloads/libpayload/drivers/usb/xhci.c b/payloads/libpayload/drivers/usb/xhci.c index 2e9dd3b912..d31a8e2a8e 100644 --- a/payloads/libpayload/drivers/usb/xhci.c +++ b/payloads/libpayload/drivers/usb/xhci.c @@ -551,6 +551,7 @@ xhci_enqueue_td(transfer_ring_t *const tr, const int ep, const size_t mps, trb->ptr_low = virt_to_phys(cur_start); TRB_SET(TL, trb, cur_length); TRB_SET(TDS, trb, packets); + TRB_SET(CH, trb, 1); /* Check for first, data stage TRB */ if (!trb_count && ep == 1) { @@ -560,17 +561,19 @@ xhci_enqueue_td(transfer_ring_t *const tr, const int ep, const size_t mps, TRB_SET(TT, trb, TRB_NORMAL); } - /* Check for last TRB */ - if (!length) - TRB_SET(IOC, trb, 1); - else - TRB_SET(CH, trb, 1); - xhci_enqueue_trb(tr); cur_start += cur_length; ++trb_count; } + + trb = tr->cur; + xhci_clear_trb(trb, tr->pcs); + trb->ptr_low = virt_to_phys(trb); /* for easier debugging only */ + TRB_SET(TT, trb, TRB_EVENT_DATA); + TRB_SET(IOC, trb, 1); + + xhci_enqueue_trb(tr); } static int @@ -583,7 +586,7 @@ xhci_control(usbdev_t *const dev, const direction_t dir, transfer_ring_t *const tr = di->transfer_rings[1]; const size_t off = (size_t)data & 0xffff; - if ((off + dalen) > ((TRANSFER_RING_SIZE - 3) << 16)) { + if ((off + dalen) > ((TRANSFER_RING_SIZE - 4) << 16)) { xhci_debug("Unsupported transfer size\n"); return 1; } @@ -670,7 +673,7 @@ xhci_bulk(endpoint_t *const ep, transfer_ring_t *const tr = di->transfer_rings[ep_id]; const size_t off = (size_t)data & 0xffff; - if ((off + size) > ((TRANSFER_RING_SIZE - 1) << 16)) { + if ((off + size) > ((TRANSFER_RING_SIZE - 2) << 16)) { xhci_debug("Unsupported transfer size\n"); return 1; } diff --git a/payloads/libpayload/drivers/usb/xhci_private.h b/payloads/libpayload/drivers/usb/xhci_private.h index 945c7f1982..c7048f494e 100644 --- a/payloads/libpayload/drivers/usb/xhci_private.h +++ b/payloads/libpayload/drivers/usb/xhci_private.h @@ -65,7 +65,7 @@ enum { XHCI_FULL_SPEED = 1, XHCI_LOW_SPEED = 2, XHCI_HIGH_SPEED = 3, XHCI_SUPER_ enum { TRB_NORMAL = 1, TRB_SETUP_STAGE = 2, TRB_DATA_STAGE = 3, TRB_STATUS_STAGE = 4, - TRB_LINK = 6, + TRB_LINK = 6, TRB_EVENT_DATA = 7, TRB_CMD_ENABLE_SLOT = 9, TRB_CMD_DISABLE_SLOT = 10, TRB_CMD_ADDRESS_DEV = 11, TRB_CMD_CONFIGURE_EP = 12, TRB_CMD_EVAL_CTX = 13, TRB_CMD_RESET_EP = 14, TRB_CMD_STOP_EP = 15, TRB_CMD_SET_TR_DQ = 16, TRB_CMD_NOOP = 23, @@ -150,6 +150,7 @@ typedef struct { u8 adv; } event_ring_t; +/* Never raise this above 256 to prevent transfer event length overflow! */ #define TRANSFER_RING_SIZE 32 typedef struct { trb_t *ring; |