From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3zHzC25KnrzF0Vs for ; Fri, 12 Jan 2018 21:15:10 +1100 (AEDT) Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w0CADqaF031117 for ; Fri, 12 Jan 2018 05:15:08 -0500 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ferqndw92-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 12 Jan 2018 05:15:07 -0500 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 12 Jan 2018 10:15:05 -0000 Subject: Re: [PATCH v6 1/2] powerpc/powernv: Enable tunneled operations To: Philippe Bergheaud , linuxppc-dev@lists.ozlabs.org Cc: fbarrat@linux.vnet.ibm.com References: <20180111150103.3137-1-felix@linux.vnet.ibm.com> From: christophe lombard Date: Fri, 12 Jan 2018 11:15:02 +0100 MIME-Version: 1.0 In-Reply-To: <20180111150103.3137-1-felix@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Message-Id: <1b4b129c-5b9e-a423-90a8-fd345e9d89f0@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Le 11/01/2018 à 16:01, Philippe Bergheaud a écrit : > P9 supports PCI tunneled operations (atomics and as_notify). This > patch adds support for tunneled operations on powernv, with a new > API, to be called by device drivers: > > pnv_pci_get_tunnel_ind() > Tell driver the 16-bit ASN indication used by kernel. > > pnv_pci_set_tunnel_bar() > Tell kernel the Tunnel BAR Response address used by driver. > This function uses two new OPAL calls, as the PBCQ Tunnel BAR > register is configured by skiboot. > > pnv_pci_get_as_notify_info() > Return the ASN info of the thread to be woken up. > > Signed-off-by: Philippe Bergheaud > --- > Changelog: > > v2: Do not set the ASN indication. Get it from the device tree. > > v3: Make pnv_pci_get_phb_node() available when compiling without cxl. > > v4: Add pnv_pci_get_as_notify_info(). > Rebase opal call numbers on skiboot 5.9.6. > > v5: pnv_pci_get_tunnel_ind(): > - fix node reference count > pnv_pci_get_as_notify_info(): > - fail if task == NULL > - read pid from mm->context.id > - explain that thread.tidr require CONFIG_PPC64 > > v6: pnv_pci_get_tunnel_ind(): > - check if radix is enabled, or else return an error > pnv_pci_get_as_notify_info(): > - remove a capi-specific comment, irrelevant for pci > > This patch depends on the following skiboot patches: > https://patchwork.ozlabs.org/patch/858324/ > https://patchwork.ozlabs.org/patch/858325/ > --- > arch/powerpc/include/asm/opal-api.h | 4 +- > arch/powerpc/include/asm/opal.h | 2 + > arch/powerpc/include/asm/pnv-pci.h | 5 ++ > arch/powerpc/platforms/powernv/opal-wrappers.S | 2 + > arch/powerpc/platforms/powernv/pci-cxl.c | 8 -- > arch/powerpc/platforms/powernv/pci.c | 106 +++++++++++++++++++++++++ > 6 files changed, 118 insertions(+), 9 deletions(-) > Acked-by: Christophe Lombard