From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Thu, 13 Aug 2015 21:09:02 +0200 Subject: [U-Boot] [PATCH] usb_storage: USB storage transfer size increase for xHCI In-Reply-To: <1439492404-1606-1-git-send-email-s.temerkhanov@gmail.com> References: <1439492404-1606-1-git-send-email-s.temerkhanov@gmail.com> Message-ID: <201508132109.02973.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Thursday, August 13, 2015 at 09:00:04 PM, Sergey Temerkhanov wrote: > Increase xHCI transfer size for USB storage devices. This helps to > achieve 10-20x speedup for large transfers > > Signed-off-by: Sergey Temerkhanov > Signed-off-by: Radha Mohan Chintakuntla Hi! > --- > > 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) Why don't you keep the XHCI consistent with EHCI, ie 64k transfers as well ? > +#define USB_MAX_XFER_BLK 4096 > #else > #define USB_MAX_XFER_BLK 20 > #endif Best regards, Marek Vasut