From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 06/22] iommu: Allocate a default domain for iommu groups Date: Thu, 28 May 2015 18:41:29 +0200 Message-ID: <1432831305-11126-7-git-send-email-joro@8bytes.org> References: <1432831305-11126-1-git-send-email-joro@8bytes.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1432831305-11126-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: jroedel-l3A5Bk7waGM@public.gmane.org, Laurent Pinchart , Heiko Stuebner , Will Deacon , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Thierry Reding , Kukjin Kim , David Woodhouse List-Id: iommu@lists.linux-foundation.org From: Joerg Roedel The default domain will be used (if supported by the iommu driver) when the devices in the iommu group are not attached to any other domain. Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index d69e0ca..fbfc015 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -51,6 +51,7 @@ struct iommu_group { void (*iommu_data_release)(void *iommu_data); char *name; int id; + struct iommu_domain *default_domain; }; struct iommu_device { @@ -75,6 +76,9 @@ struct iommu_group_attribute iommu_group_attr_##_name = \ #define to_iommu_group(_kobj) \ container_of(_kobj, struct iommu_group, kobj) +static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus, + unsigned type); + static ssize_t iommu_group_attr_show(struct kobject *kobj, struct attribute *__attr, char *buf) { @@ -137,6 +141,9 @@ static void iommu_group_release(struct kobject *kobj) ida_remove(&iommu_group_ida, group->id); mutex_unlock(&iommu_group_mutex); + if (group->default_domain) + iommu_domain_free(group->default_domain); + kfree(group->name); kfree(group); } @@ -701,7 +708,18 @@ static struct iommu_group *iommu_group_get_for_pci_dev(struct pci_dev *pdev) return group; /* No shared group found, allocate new */ - return iommu_group_alloc(); + group = iommu_group_alloc(); + if (group) { + /* + * Try to allocate a default domain - needs support from the + * IOMMU driver. + */ + group->default_domain = __iommu_domain_alloc(pdev->dev.bus, + IOMMU_DOMAIN_DMA); + group->domain = group->default_domain; + } + + return group; } /** @@ -922,22 +940,28 @@ void iommu_set_fault_handler(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_set_fault_handler); -struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) +static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus, + unsigned type) { struct iommu_domain *domain; if (bus == NULL || bus->iommu_ops == NULL) return NULL; - domain = bus->iommu_ops->domain_alloc(IOMMU_DOMAIN_UNMANAGED); + domain = bus->iommu_ops->domain_alloc(type); if (!domain) return NULL; domain->ops = bus->iommu_ops; - domain->type = IOMMU_DOMAIN_UNMANAGED; + domain->type = type; return domain; } + +struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) +{ + return __iommu_domain_alloc(bus, IOMMU_DOMAIN_UNMANAGED); +} EXPORT_SYMBOL_GPL(iommu_domain_alloc); void iommu_domain_free(struct iommu_domain *domain) -- 1.9.1