[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1427373799-18662-2-git-send-email-joro@8bytes.org>
Date: Thu, 26 Mar 2015 13:43:04 +0100
From: Joerg Roedel <joro@...tes.org>
To: iommu@...ts.linux-foundation.org
Cc: Will Deacon <will.deacon@....com>, Kukjin Kim <kgene@...nel.org>,
David Woodhouse <dwmw2@...radead.org>,
Heiko Stuebner <heiko@...ech.de>,
Hiroshi Doyu <hdoyu@...dia.com>,
Stephen Warren <swarren@...dotorg.org>,
Thierry Reding <thierry.reding@...il.com>,
Alexandre Courbot <gnurou@...il.com>,
Alex Williamson <alex.williamson@...hat.com>,
Arnd Bergmann <arnd@...db.de>,
Yingjoe Chen <yingjoe.chen@...iatek.com>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-tegra@...r.kernel.org,
Joerg Roedel <joro@...tes.org>, jroedel@...e.de
Subject: [PATCH 01/16] iommu: Introduce domain_alloc and domain_free iommu_ops
From: Joerg Roedel <jroedel@...e.de>
These new call-backs defer the allocation and destruction of
'struct iommu_domain' to the iommu driver. This allows
drivers to embed this struct into their private domain
structures and to get rid of the domain_init and
domain_destroy call-backs when all drivers have been
converted.
Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
drivers/iommu/iommu.c | 29 +++++++++++++++++++++--------
include/linux/iommu.h | 5 +++++
2 files changed, 26 insertions(+), 8 deletions(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 72e683d..11de262 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -900,26 +900,34 @@ EXPORT_SYMBOL_GPL(iommu_set_fault_handler);
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
+ const struct iommu_ops *ops;
struct iommu_domain *domain;
- int ret;
if (bus == NULL || bus->iommu_ops == NULL)
return NULL;
- domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+ ops = bus->iommu_ops;
+
+ if (ops->domain_alloc)
+ domain = ops->domain_alloc();
+ else
+ domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+
if (!domain)
return NULL;
domain->ops = bus->iommu_ops;
- ret = domain->ops->domain_init(domain);
- if (ret)
+ if (ops->domain_init && domain->ops->domain_init(domain))
goto out_free;
return domain;
out_free:
- kfree(domain);
+ if (ops->domain_free)
+ ops->domain_free(domain);
+ else
+ kfree(domain);
return NULL;
}
@@ -927,10 +935,15 @@ EXPORT_SYMBOL_GPL(iommu_domain_alloc);
void iommu_domain_free(struct iommu_domain *domain)
{
- if (likely(domain->ops->domain_destroy != NULL))
- domain->ops->domain_destroy(domain);
+ const struct iommu_ops *ops = domain->ops;
- kfree(domain);
+ if (likely(ops->domain_destroy != NULL))
+ ops->domain_destroy(domain);
+
+ if (ops->domain_free)
+ ops->domain_free(domain);
+ else
+ kfree(domain);
}
EXPORT_SYMBOL_GPL(iommu_domain_free);
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 38daa45..69d1d12 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -115,6 +115,11 @@ struct iommu_ops {
bool (*capable)(enum iommu_cap);
int (*domain_init)(struct iommu_domain *domain);
void (*domain_destroy)(struct iommu_domain *domain);
+
+ /* Domain allocation and freeing by the iommu driver */
+ struct iommu_domain *(*domain_alloc)(void);
+ void (*domain_free)(struct iommu_domain *);
+
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
int (*map)(struct iommu_domain *domain, unsigned long iova,
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists