From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751914AbdKTR5d (ORCPT ); Mon, 20 Nov 2017 12:57:33 -0500 Received: from mail-qk0-f194.google.com ([209.85.220.194]:44939 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751781AbdKTR5b (ORCPT ); Mon, 20 Nov 2017 12:57:31 -0500 X-Google-Smtp-Source: AGs4zMYY62h5XSa32FXmeWOAZg9vFdbU1aty1ygNyo246nMbbVHZYyGToZrXnQF4L5cUCYEK4+C6tBsEN7SlBhgdK/Q= MIME-Version: 1.0 In-Reply-To: <1510107838-15181-11-git-send-email-sukadev@linux.vnet.ibm.com> References: <1510107838-15181-1-git-send-email-sukadev@linux.vnet.ibm.com> <1510107838-15181-11-git-send-email-sukadev@linux.vnet.ibm.com> From: Josh Boyer Date: Mon, 20 Nov 2017 12:57:30 -0500 X-Google-Sender-Auth: -nCkwa8nur6aW8Rl6_ch9DTDvx8 Message-ID: Subject: Re: [PATCH v3 10/18] powerpc/vas, nx-842: Define and use chip_to_vas_id() To: Sukadev Bhattiprolu Cc: Michael Ellerman , Benjamin Herrenschmidt , Michael Neuling , hbabu@us.ibm.com, nicholas.piggin@gmail.com, linuxppc-dev list , "Linux-Kernel@Vger. Kernel. Org" , "kernel-team@fedoraproject.org" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 7, 2017 at 9:23 PM, Sukadev Bhattiprolu wrote: > Define a helper, chip_to_vas_id() to map a given chip id to corresponding > vas id. > > Normally, callers of vas_rx_win_open() and vas_tx_win_open() want the VAS > window to be on the same chip where the calling thread is executing. These > callers can pass in -1 for the VAS id. > > This interface will be useful if a thread running on one chip wants to open > a window on another chip (like the NX-842 driver does during start up). > > Signed-off-by: Sukadev Bhattiprolu The Fedora kernel team seems to have hit an issue with this commit when trying to build a rawhide kernel that includes it. The failure is: ERROR: "chip_to_vas_id" [drivers/crypto/nx/nx-compress-powernv.ko] undefined! make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1 make: *** [Makefile:1218: modules] Error 2 + exit 1 error: Bad exit status from /var/tmp/rpm-tmp.dmbw5D (%build) RPM build errors: Bad exit status from /var/tmp/rpm-tmp.dmbw5D (%build) Child return code was: 1 EXCEPTION: [Error()] > --- > arch/powerpc/include/asm/vas.h | 9 +++++++++ > arch/powerpc/platforms/powernv/vas.c | 11 +++++++++++ > drivers/crypto/nx/nx-842-powernv.c | 18 +++--------------- > 3 files changed, 23 insertions(+), 15 deletions(-) > > diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h > index fd5963a..044748f 100644 > --- a/arch/powerpc/include/asm/vas.h > +++ b/arch/powerpc/include/asm/vas.h > @@ -104,6 +104,15 @@ struct vas_tx_win_attr { > }; > > /* > + * Helper to map a chip id to VAS id. > + * For POWER9, this is a 1:1 mapping. In the future this maybe a 1:N > + * mapping in which case, we will need to update this helper. > + * > + * Return the VAS id or -1 if no matching vasid is found. > + */ > +int chip_to_vas_id(int chipid); > + > +/* > * Helper to initialize receive window attributes to defaults for an > * NX window. > */ > diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c > index abb7090..cd9a733 100644 > --- a/arch/powerpc/platforms/powernv/vas.c > +++ b/arch/powerpc/platforms/powernv/vas.c > @@ -123,6 +123,17 @@ struct vas_instance *find_vas_instance(int vasid) > return NULL; > } > > +int chip_to_vas_id(int chipid) > +{ > + int cpu; > + > + for_each_possible_cpu(cpu) { > + if (cpu_to_chip_id(cpu) == chipid) > + return per_cpu(cpu_vas_id, cpu); > + } > + return -1; > +} > + Likely need an EXPORT_SYMBOL here? > static int vas_probe(struct platform_device *pdev) > { > return init_vas_instance(pdev); > diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c > index 874ddf5..eb221ed 100644 > --- a/drivers/crypto/nx/nx-842-powernv.c > +++ b/drivers/crypto/nx/nx-842-powernv.c Did anyone test this driver built as a module with this commit included? josh > @@ -847,24 +847,12 @@ static int __init nx842_powernv_probe_vas(struct device_node *pn) > return -EINVAL; > } > > - for_each_compatible_node(dn, NULL, "ibm,power9-vas-x") { > - if (of_get_ibm_chip_id(dn) == chip_id) > - break; > - } > - > - if (!dn) { > - pr_err("Missing VAS device node\n"); > + vasid = chip_to_vas_id(chip_id); > + if (vasid < 0) { > + pr_err("Unable to map chip_id %d to vasid\n", chip_id); > return -EINVAL; > } > > - if (of_property_read_u32(dn, "ibm,vas-id", &vasid)) { > - pr_err("Missing ibm,vas-id device property\n"); > - of_node_put(dn); > - return -EINVAL; > - } > - > - of_node_put(dn); > - > for_each_child_of_node(pn, dn) { > if (of_device_is_compatible(dn, "ibm,p9-nx-842")) { > ret = vas_cfg_coproc_info(dn, chip_id, vasid); > -- > 2.7.4 >