linux-kernel - [PATCH RFCv1 01/14] iommufd: Move iommufd

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Message-ID: <09e84c7c9099aba07b24b113c70d57d4574aee08.1712978212.git.nicolinc@nvidia.com>
Date: Fri, 12 Apr 2024 20:46:58 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <will@...nel.org>, <robin.murphy@....com>, <jgg@...dia.com>,
	<kevin.tian@...el.com>, <suravee.suthikulpanit@....com>
CC: <joro@...tes.org>, <linux-kernel@...r.kernel.org>,
	<iommu@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-tegra@...r.kernel.org>, <yi.l.liu@...el.com>, <eric.auger@...hat.com>,
	<vasant.hegde@....com>, <jon.grimm@....com>, <santosh.shukla@....com>,
	<Dhaval.Giani@....com>, <shameerali.kolothum.thodi@...wei.com>
Subject: [PATCH RFCv1 01/14] iommufd: Move iommufd_object to public iommufd header

To prepare for a new public iommufd_viommu structure that will be an
embedded object in a driver's viommu structure:
    // include/linux/iommufd.h
    struct iommufd_viommu {
        struct iommufd_object obj;
        ....
    };

    // Some IOMMU driver
    struct iommu_driver_viommu {
        struct iommufd_viommu core;
        ....
    };

Move iommufd_object and iommufd_object_type to the public header.

Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/iommu/iommufd/iommufd_private.h | 24 +-----------------------
 include/linux/iommufd.h                 | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 23 deletions(-)

diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h
index 991f864d1f9b..3ea0a093ee50 100644
--- a/drivers/iommu/iommufd/iommufd_private.h
+++ b/drivers/iommu/iommufd/iommufd_private.h
@@ -6,9 +6,9 @@
 
 #include <linux/rwsem.h>
 #include <linux/xarray.h>
-#include <linux/refcount.h>
 #include <linux/uaccess.h>
 #include <linux/iommu.h>
+#include <linux/iommufd.h>
 #include <linux/iova_bitmap.h>
 #include <uapi/linux/iommufd.h>
 
@@ -120,28 +120,6 @@ static inline int iommufd_ucmd_respond(struct iommufd_ucmd *ucmd,
 	return 0;
 }
 
-enum iommufd_object_type {
-	IOMMUFD_OBJ_NONE,
-	IOMMUFD_OBJ_ANY = IOMMUFD_OBJ_NONE,
-	IOMMUFD_OBJ_DEVICE,
-	IOMMUFD_OBJ_HWPT_PAGING,
-	IOMMUFD_OBJ_HWPT_NESTED,
-	IOMMUFD_OBJ_IOAS,
-	IOMMUFD_OBJ_ACCESS,
-#ifdef CONFIG_IOMMUFD_TEST
-	IOMMUFD_OBJ_SELFTEST,
-#endif
-	IOMMUFD_OBJ_MAX,
-};
-
-/* Base struct for all objects with a userspace ID handle. */
-struct iommufd_object {
-	refcount_t shortterm_users;
-	refcount_t users;
-	enum iommufd_object_type type;
-	unsigned int id;
-};
-
 static inline bool iommufd_lock_obj(struct iommufd_object *obj)
 {
 	if (!refcount_inc_not_zero(&obj->users))
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h
index ffc3a949f837..a0cb08a4b653 100644
--- a/include/linux/iommufd.h
+++ b/include/linux/iommufd.h
@@ -9,6 +9,7 @@
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/err.h>
+#include <linux/refcount.h>
 
 struct device;
 struct iommufd_device;
@@ -18,6 +19,28 @@ struct iommufd_access;
 struct file;
 struct iommu_group;
 
+enum iommufd_object_type {
+	IOMMUFD_OBJ_NONE,
+	IOMMUFD_OBJ_ANY = IOMMUFD_OBJ_NONE,
+	IOMMUFD_OBJ_DEVICE,
+	IOMMUFD_OBJ_HWPT_PAGING,
+	IOMMUFD_OBJ_HWPT_NESTED,
+	IOMMUFD_OBJ_IOAS,
+	IOMMUFD_OBJ_ACCESS,
+#ifdef CONFIG_IOMMUFD_TEST
+	IOMMUFD_OBJ_SELFTEST,
+#endif
+	IOMMUFD_OBJ_MAX,
+};
+
+/* Base struct for all objects with a userspace ID handle. */
+struct iommufd_object {
+	refcount_t shortterm_users;
+	refcount_t users;
+	enum iommufd_object_type type;
+	unsigned int id;
+};
+
 struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx,
 					   struct device *dev, u32 *id);
 void iommufd_device_unbind(struct iommufd_device *idev);
-- 
2.43.0