From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from co1outboundpool.messaging.microsoft.com (co1ehsobe006.messaging.microsoft.com [216.32.180.189]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "MSIT Machine Auth CA 2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 6BE032C00A7 for ; Fri, 23 Aug 2013 07:38:24 +1000 (EST) Message-ID: <1377207495.20722.11.camel@snotra.buserror.net> Subject: Re: Ethernet over PCIe driver for Inter-Processor Communication From: Scott Wood To: Saravanan S Date: Thu, 22 Aug 2013 16:38:15 -0500 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Cc: "linuxppc-dev@lists.ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2013-08-22 at 21:04 +0530, Saravanan S wrote: > a) I can generate MSI interrupts from End Point to Root Complex over > PCI . But the vice-versa is not possible . However i need a method to > interrupt the End Point from the Root Complex to complete my driver. > Only previous references I can find are this post > http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg25765.html . However this uses doorbells and I think may not be possible in MPC8640. You should be able to write to the destination's MPIC registers to send a doorbell. -Scott