From patchwork Thu Jan 19 20:57:47 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 9526861 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5B0C660437 for ; Thu, 19 Jan 2017 21:03:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 47FD228651 for ; Thu, 19 Jan 2017 21:03:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3B6ED2865D; Thu, 19 Jan 2017 21:03:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=2.0 tests=BAYES_00,RDNS_NONE autolearn=no version=3.3.1 Received: from bombadil.infradead.org (unknown [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A943228651 for ; Thu, 19 Jan 2017 21:03:33 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cUJrl-0003md-Hw; Thu, 19 Jan 2017 21:03:29 +0000 Received: from casper.infradead.org ([85.118.1.10]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cUJpf-0001A2-5N for linux-arm-kernel@bombadil.infradead.org; Thu, 19 Jan 2017 21:01:19 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by casper.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cUJnX-0007oG-32 for linux-arm-kernel@lists.infradead.org; Thu, 19 Jan 2017 20:59:09 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E1456C04B935; Thu, 19 Jan 2017 20:58:24 +0000 (UTC) Received: from localhost.redhat.com (vpn1-5-234.ams2.redhat.com [10.36.5.234]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v0JKw58i001139; Thu, 19 Jan 2017 15:58:18 -0500 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 02/18] iommu: Rename iommu_dm_regions into iommu_resv_regions Date: Thu, 19 Jan 2017 20:57:47 +0000 Message-Id: <1484859483-2866-3-git-send-email-eric.auger@redhat.com> In-Reply-To: <1484859483-2866-1-git-send-email-eric.auger@redhat.com> References: <1484859483-2866-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 19 Jan 2017 20:58:25 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170119_205907_400462_04A69B9E X-CRM114-Status: GOOD ( 22.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: drjones@redhat.com, kvm@vger.kernel.org, punit.agrawal@arm.com, linux-kernel@vger.kernel.org, geethasowjanya.akula@gmail.com, diana.craciun@nxp.com, iommu@lists.linux-foundation.org, pranav.sawargaonkar@gmail.com, bharat.bhushan@nxp.com, shankerd@codeaurora.org, gpkulkarni@gmail.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP We want to extend the callbacks used for dm regions and use them for reserved regions. Reserved regions can be - directly mapped regions - regions that cannot be iommu mapped (PCI host bridge windows, ...) - MSI regions (because they belong to another address space or because they are not translated by the IOMMU and need special handling) So let's rename the struct and also the callbacks. Signed-off-by: Eric Auger Acked-by: Robin Murphy Reviewed-by: Tomasz Nowicki Tested-by: Tomasz Nowicki Tested-by: Bharat Bhushan --- v3 -> v4: - add Robin's A-b --- drivers/iommu/amd_iommu.c | 20 ++++++++++---------- drivers/iommu/iommu.c | 22 +++++++++++----------- include/linux/iommu.h | 29 +++++++++++++++-------------- 3 files changed, 36 insertions(+), 35 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 3ef0f42..f7a024f 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3161,8 +3161,8 @@ static bool amd_iommu_capable(enum iommu_cap cap) return false; } -static void amd_iommu_get_dm_regions(struct device *dev, - struct list_head *head) +static void amd_iommu_get_resv_regions(struct device *dev, + struct list_head *head) { struct unity_map_entry *entry; int devid; @@ -3172,7 +3172,7 @@ static void amd_iommu_get_dm_regions(struct device *dev, return; list_for_each_entry(entry, &amd_iommu_unity_map, list) { - struct iommu_dm_region *region; + struct iommu_resv_region *region; if (devid < entry->devid_start || devid > entry->devid_end) continue; @@ -3195,18 +3195,18 @@ static void amd_iommu_get_dm_regions(struct device *dev, } } -static void amd_iommu_put_dm_regions(struct device *dev, +static void amd_iommu_put_resv_regions(struct device *dev, struct list_head *head) { - struct iommu_dm_region *entry, *next; + struct iommu_resv_region *entry, *next; list_for_each_entry_safe(entry, next, head, list) kfree(entry); } -static void amd_iommu_apply_dm_region(struct device *dev, +static void amd_iommu_apply_resv_region(struct device *dev, struct iommu_domain *domain, - struct iommu_dm_region *region) + struct iommu_resv_region *region) { struct dma_ops_domain *dma_dom = to_dma_ops_domain(to_pdomain(domain)); unsigned long start, end; @@ -3230,9 +3230,9 @@ static void amd_iommu_apply_dm_region(struct device *dev, .add_device = amd_iommu_add_device, .remove_device = amd_iommu_remove_device, .device_group = amd_iommu_device_group, - .get_dm_regions = amd_iommu_get_dm_regions, - .put_dm_regions = amd_iommu_put_dm_regions, - .apply_dm_region = amd_iommu_apply_dm_region, + .get_resv_regions = amd_iommu_get_resv_regions, + .put_resv_regions = amd_iommu_put_resv_regions, + .apply_resv_region = amd_iommu_apply_resv_region, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index dbe7f65..1cee5c3 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -318,7 +318,7 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group, struct device *dev) { struct iommu_domain *domain = group->default_domain; - struct iommu_dm_region *entry; + struct iommu_resv_region *entry; struct list_head mappings; unsigned long pg_size; int ret = 0; @@ -331,14 +331,14 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group, pg_size = 1UL << __ffs(domain->pgsize_bitmap); INIT_LIST_HEAD(&mappings); - iommu_get_dm_regions(dev, &mappings); + iommu_get_resv_regions(dev, &mappings); /* We need to consider overlapping regions for different devices */ list_for_each_entry(entry, &mappings, list) { dma_addr_t start, end, addr; - if (domain->ops->apply_dm_region) - domain->ops->apply_dm_region(dev, domain, entry); + if (domain->ops->apply_resv_region) + domain->ops->apply_resv_region(dev, domain, entry); start = ALIGN(entry->start, pg_size); end = ALIGN(entry->start + entry->length, pg_size); @@ -358,7 +358,7 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group, } out: - iommu_put_dm_regions(dev, &mappings); + iommu_put_resv_regions(dev, &mappings); return ret; } @@ -1559,20 +1559,20 @@ int iommu_domain_set_attr(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_domain_set_attr); -void iommu_get_dm_regions(struct device *dev, struct list_head *list) +void iommu_get_resv_regions(struct device *dev, struct list_head *list) { const struct iommu_ops *ops = dev->bus->iommu_ops; - if (ops && ops->get_dm_regions) - ops->get_dm_regions(dev, list); + if (ops && ops->get_resv_regions) + ops->get_resv_regions(dev, list); } -void iommu_put_dm_regions(struct device *dev, struct list_head *list) +void iommu_put_resv_regions(struct device *dev, struct list_head *list) { const struct iommu_ops *ops = dev->bus->iommu_ops; - if (ops && ops->put_dm_regions) - ops->put_dm_regions(dev, list); + if (ops && ops->put_resv_regions) + ops->put_resv_regions(dev, list); } /* Request that a device is direct mapped by the IOMMU */ diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 0ff5111..bfecb8b 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -118,13 +118,13 @@ enum iommu_attr { }; /** - * struct iommu_dm_region - descriptor for a direct mapped memory region + * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers * @start: System physical start address of the region * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) */ -struct iommu_dm_region { +struct iommu_resv_region { struct list_head list; phys_addr_t start; size_t length; @@ -150,9 +150,9 @@ struct iommu_dm_region { * @device_group: find iommu group for a particular device * @domain_get_attr: Query domain attributes * @domain_set_attr: Change domain attributes - * @get_dm_regions: Request list of direct mapping requirements for a device - * @put_dm_regions: Free list of direct mapping requirements for a device - * @apply_dm_region: Temporary helper call-back for iova reserved ranges + * @get_resv_regions: Request list of reserved regions for a device + * @put_resv_regions: Free list of reserved regions for a device + * @apply_resv_region: Temporary helper call-back for iova reserved ranges * @domain_window_enable: Configure and enable a particular window for a domain * @domain_window_disable: Disable a particular window for a domain * @domain_set_windows: Set the number of windows for a domain @@ -184,11 +184,12 @@ struct iommu_ops { int (*domain_set_attr)(struct iommu_domain *domain, enum iommu_attr attr, void *data); - /* Request/Free a list of direct mapping requirements for a device */ - void (*get_dm_regions)(struct device *dev, struct list_head *list); - void (*put_dm_regions)(struct device *dev, struct list_head *list); - void (*apply_dm_region)(struct device *dev, struct iommu_domain *domain, - struct iommu_dm_region *region); + /* Request/Free a list of reserved regions for a device */ + void (*get_resv_regions)(struct device *dev, struct list_head *list); + void (*put_resv_regions)(struct device *dev, struct list_head *list); + void (*apply_resv_region)(struct device *dev, + struct iommu_domain *domain, + struct iommu_resv_region *region); /* Window handling functions */ int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr, @@ -233,8 +234,8 @@ extern size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long io extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token); -extern void iommu_get_dm_regions(struct device *dev, struct list_head *list); -extern void iommu_put_dm_regions(struct device *dev, struct list_head *list); +extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); +extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); extern int iommu_request_dm_for_dev(struct device *dev); extern int iommu_attach_group(struct iommu_domain *domain, @@ -443,12 +444,12 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain, { } -static inline void iommu_get_dm_regions(struct device *dev, +static inline void iommu_get_resv_regions(struct device *dev, struct list_head *list) { } -static inline void iommu_put_dm_regions(struct device *dev, +static inline void iommu_put_resv_regions(struct device *dev, struct list_head *list) { }