[U-Boot] [PATCH] usb_storage: USB storage transfer size increase for xHCI

[Sergey Temerkhanov]

Increase xHCI transfer size for USB storage devices. This helps to
achieve 10-20x speedup for large transfers

Signed-off-by: Sergey Temerkhanov <s.temerkhanov at gmail.com>
Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla at cavium.com>
---

 common/usb_storage.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/usb_storage.c b/common/usb_storage.c
index b978430..ee5acca 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -97,13 +97,15 @@ struct us_data {
 	trans_cmnd	transport;		/* transport routine */
 };
 
-#ifdef CONFIG_USB_EHCI
+#if defined(CONFIG_USB_EHCI)
 /*
  * The U-Boot EHCI driver can handle any transfer length as long as there is
  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
  * limited to 65535 blocks.
  */
 #define USB_MAX_XFER_BLK	65535
+#elif defined(CONFIG_USB_XHCI)
+#define USB_MAX_XFER_BLK	4096
 #else
 #define USB_MAX_XFER_BLK	20
 #endif
-- 
2.2.0