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[xhci] Allow for residual byte counts exceeding 64kB

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2026-08-03 22:04:54 +01:00
parent 24a4bff85f
commit da52150a78
2 changed files with 19 additions and 11 deletions
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src/drivers/usb/xhci.c
+11 -5
View File
@@ -1598,6 +1598,8 @@ static void xhci_transfer ( struct xhci_device *xhci,
struct xhci_slot *slot;
struct xhci_endpoint *endpoint;
struct io_buffer *iobuf;
uint32_t cmplt;
unsigned int code;
int rc;
/* Profile transfer events */
@@ -1628,14 +1630,18 @@ static void xhci_transfer ( struct xhci_device *xhci,
/* Unmap I/O buffer */
iob_unmap ( iobuf );
/* Parse completion */
cmplt = le32_to_cpu ( trb->cmplt );
code = XHCI_CMPLT_CODE ( cmplt );
/* Check for errors */
if ( ! ( ( trb->code == XHCI_CMPLT_SUCCESS ) ||
( trb->code == XHCI_CMPLT_SHORT ) ) ) {
if ( ! ( ( code == XHCI_CMPLT_SUCCESS ) ||
( code == XHCI_CMPLT_SHORT ) ) ) {
/* Construct error */
rc = -ECODE ( trb->code );
rc = -ECODE ( code );
DBGC ( xhci, "XHCI %s slot %d ctx %d failed (code %d): %s\n",
xhci->name, slot->id, endpoint->ctx, trb->code,
xhci->name, slot->id, endpoint->ctx, code,
strerror ( rc ) );
DBGC_HDA ( xhci, 0, trb, sizeof ( *trb ) );
@@ -1649,7 +1655,7 @@ static void xhci_transfer ( struct xhci_device *xhci,
}
/* Record actual transfer size */
iob_unput ( iobuf, le16_to_cpu ( trb->residual ) );
iob_unput ( iobuf, XHCI_CMPLT_RESIDUAL ( cmplt ) );
/* Sanity check (for successful completions only) */
assert ( xhci_ring_consumed ( &endpoint->ring ) ==
src/include/ipxe/xhci.h
+8 -6
View File
@@ -589,12 +589,8 @@ struct xhci_trb_set_tr_dequeue_pointer {
struct xhci_trb_transfer {
/** Transfer TRB pointer */
uint64_t transfer;
/** Residual transfer length */
uint16_t residual;
/** Reserved */
uint8_t reserved;
/** Completion code */
uint8_t code;
/** Completion status */
uint32_t cmplt;
/** Flags */
uint8_t flags;
/** Type */
@@ -608,6 +604,12 @@ struct xhci_trb_transfer {
/** A transfer event transfer request block */
#define XHCI_TRB_TRANSFER XHCI_TRB_TYPE ( 32 )
/** Completion code */
#define XHCI_CMPLT_CODE( cmplt ) ( (cmplt) >> 24 )
/** Residual bytes not transferred */
#define XHCI_CMPLT_RESIDUAL( cmplt ) ( (cmplt) & 0xffffff )
/** A command completion event transfer request block */
struct xhci_trb_complete {
/** Command TRB pointer */