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Wed, 6 Apr 2022 08:51:12 -0700 (PDT) Date: Wed, 6 Apr 2022 16:51:13 +0100 From: Lorenzo Pieralisi To: Shameer Kolothum 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-Disposition: inline In-Reply-To: <20220404124209.1086-8-shameerali.kolothum.thodi@huawei.com> User-Agent: Mutt/1.9.4 (2018-02-28) Cc: will@kernel.org, jon@solid-run.com, linuxarm@huawei.com, steven.price@arm.com, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, wanghuiqiang@huawei.com, guohanjun@huawei.com, yangyicong@huawei.com, Sami.Mujawar@arm.com, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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 > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu