From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FCCEC433EF for ; Wed, 6 Apr 2022 17:40:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238806AbiDFRmE (ORCPT ); Wed, 6 Apr 2022 13:42:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239374AbiDFRlo (ORCPT ); Wed, 6 Apr 2022 13:41:44 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2F4F71E1F7B for ; Wed, 6 Apr 2022 08:51:15 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E1BC012FC; Wed, 6 Apr 2022 08:51:14 -0700 (PDT) Received: from lpieralisi (unknown [10.57.21.160]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BC8973F73B; Wed, 6 Apr 2022 08:51:12 -0700 (PDT) Date: Wed, 6 Apr 2022 16:51:13 +0100 From: Lorenzo Pieralisi To: Shameer Kolothum Cc: linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, linuxarm@huawei.com, joro@8bytes.org, robin.murphy@arm.com, will@kernel.org, wanghuiqiang@huawei.com, guohanjun@huawei.com, steven.price@arm.com, Sami.Mujawar@arm.com, jon@solid-run.com, eric.auger@redhat.com, laurentiu.tudor@nxp.com, yangyicong@huawei.com Subject: Re: [PATCH v9 07/11] ACPI/IORT: Add a helper to retrieve RMR info directly Message-ID: <20220406155113.GC27518@lpieralisi> References: <20220404124209.1086-1-shameerali.kolothum.thodi@huawei.com> <20220404124209.1086-8-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220404124209.1086-8-shameerali.kolothum.thodi@huawei.com> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Mon, Apr 04, 2022 at 01:42:05PM +0100, Shameer Kolothum wrote: > This will provide a way for SMMU drivers to retrieve StreamIDs > associated with IORT RMR nodes and use that to set bypass settings > for those IDs. > > Signed-off-by: Shameer Kolothum > --- > drivers/acpi/arm64/iort.c | 29 +++++++++++++++++++++++++++++ > include/linux/acpi_iort.h | 8 ++++++++ > 2 files changed, 37 insertions(+) Reviewed-by: Lorenzo Pieralisi > diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c > index 1147387cfddb..fb2b0163c27d 100644 > --- a/drivers/acpi/arm64/iort.c > +++ b/drivers/acpi/arm64/iort.c > @@ -1402,6 +1402,35 @@ int iort_dma_get_ranges(struct device *dev, u64 *size) > return nc_dma_get_range(dev, size); > } > > +/** > + * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with > + * associated StreamIDs information. > + * @iommu_fwnode: fwnode associated with IOMMU > + * @head: Resereved region list > + */ > +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, > + struct list_head *head) > +{ > + iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head); > +} > +EXPORT_SYMBOL_GPL(iort_get_rmr_sids); > + > +/** > + * iort_put_rmr_sids - Free all the memory allocated for RMR reserved regions. > + * @iommu_fwnode: fwnode associated with IOMMU > + * @head: Resereved region list > + */ > +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, > + struct list_head *head) > +{ > + struct iommu_resv_region *entry, *next; > + > + iort_iommu_put_resv_regions(NULL, head); > + list_for_each_entry_safe(entry, next, head, list) > + kfree(entry); > +} > +EXPORT_SYMBOL_GPL(iort_put_rmr_sids); > + > static void __init acpi_iort_register_irq(int hwirq, const char *name, > int trigger, > struct resource *res) > diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h > index eb3c28853110..774b8bc16573 100644 > --- a/include/linux/acpi_iort.h > +++ b/include/linux/acpi_iort.h > @@ -33,6 +33,10 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id, > enum irq_domain_bus_token bus_token); > void acpi_configure_pmsi_domain(struct device *dev); > int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); > +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, > + struct list_head *head); > +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, > + struct list_head *head); > /* IOMMU interface */ > int iort_dma_get_ranges(struct device *dev, u64 *size); > int iort_iommu_configure_id(struct device *dev, const u32 *id_in); > @@ -47,6 +51,10 @@ static inline struct irq_domain *iort_get_device_domain( > struct device *dev, u32 id, enum irq_domain_bus_token bus_token) > { return NULL; } > static inline void acpi_configure_pmsi_domain(struct device *dev) { } > +static inline > +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { } > +static inline > +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { } > /* IOMMU interface */ > static inline int iort_dma_get_ranges(struct device *dev, u64 *size) > { return -ENODEV; } > -- > 2.25.1 >