Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935325AbXHNX3G (ORCPT ); Tue, 14 Aug 2007 19:29:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935346AbXHNX1y (ORCPT ); Tue, 14 Aug 2007 19:27:54 -0400 Received: from stargate.chelsio.com ([12.22.49.110]:7241 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935110AbXHNX1w (ORCPT ); Tue, 14 Aug 2007 19:27:52 -0400 Message-ID: <46C23A73.4090907@chelsio.com> Date: Tue, 14 Aug 2007 16:27:47 -0700 From: Divy Le Ray User-Agent: Thunderbird 1.5.0.12 (X11/20070509) MIME-Version: 1.0 To: Jeff Garzik CC: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, swise@opengridcomputing.com Subject: Re: [PATCH 5/13] cxgb3 - Expose HW memory page info References: <20070811062954.8094.33064.stgit@speedy5> <46C14140.2000104@garzik.org> In-Reply-To: <46C14140.2000104@garzik.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 14 Aug 2007 23:26:30.0411 (UTC) FILETIME=[8B3C8DB0:01C7DECA] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 845 Lines: 26 Jeff Garzik wrote: > Divy Le Ray wrote: >> From: Divy Le Ray >> >> Let the RDMA driver get HW page info to work around HW issues. >> Assign explicit enum values. >> >> Signed-off-by: Divy Le Ray > > "HW issues" -- you need to go into far more detail, when adding a new > interface. what hw issues? why was this the best/only solution? > > A HW issue requires limiting the receive window size to 23 pages of internal memory. These pages can be configured to different sizes, thus the RDMA driver needs to know the page size to enforce the upper limit. Divy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/