From: Yi Liu <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com
Cc: joro@8bytes.org, robin.murphy@arm.com, cohuck@redhat.com,
eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org,
mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com,
yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com,
jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com,
lulu@redhat.com, suravee.suthikulpanit@amd.com,
intel-gvt-dev@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org,
xudong.hao@intel.com, yan.y.zhao@intel.com,
terrence.xu@intel.com, yanting.jiang@intel.com,
zhenzhong.duan@intel.com
Subject: [PATCH v10 06/22] vfio: Pass struct vfio_device_file * to vfio_device_open/close()
Date: Wed, 26 Apr 2023 08:03:05 -0700 [thread overview]
Message-ID: <20230426150321.454465-7-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230426150321.454465-1-yi.l.liu@intel.com>
This avoids passing too much parameters in multiple functions.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/vfio/group.c | 20 ++++++++++++++------
drivers/vfio/vfio.h | 8 ++++----
drivers/vfio/vfio_main.c | 25 +++++++++++++++----------
3 files changed, 33 insertions(+), 20 deletions(-)
diff --git a/drivers/vfio/group.c b/drivers/vfio/group.c
index d5e9cf422d2a..3cd373ffd308 100644
--- a/drivers/vfio/group.c
+++ b/drivers/vfio/group.c
@@ -169,8 +169,9 @@ static void vfio_device_group_get_kvm_safe(struct vfio_device *device)
spin_unlock(&device->group->kvm_ref_lock);
}
-static int vfio_device_group_open(struct vfio_device *device)
+static int vfio_device_group_open(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
int ret;
mutex_lock(&device->group->group_lock);
@@ -190,7 +191,11 @@ static int vfio_device_group_open(struct vfio_device *device)
if (device->open_count == 0)
vfio_device_group_get_kvm_safe(device);
- ret = vfio_device_open(device, device->group->iommufd);
+ df->iommufd = device->group->iommufd;
+
+ ret = vfio_device_open(df);
+ if (ret)
+ df->iommufd = NULL;
if (device->open_count == 0)
vfio_device_put_kvm(device);
@@ -202,12 +207,15 @@ static int vfio_device_group_open(struct vfio_device *device)
return ret;
}
-void vfio_device_group_close(struct vfio_device *device)
+void vfio_device_group_close(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
+
mutex_lock(&device->group->group_lock);
mutex_lock(&device->dev_set->lock);
- vfio_device_close(device, device->group->iommufd);
+ vfio_device_close(df);
+ df->iommufd = NULL;
if (device->open_count == 0)
vfio_device_put_kvm(device);
@@ -228,7 +236,7 @@ static struct file *vfio_device_open_file(struct vfio_device *device)
goto err_out;
}
- ret = vfio_device_group_open(device);
+ ret = vfio_device_group_open(df);
if (ret)
goto err_free;
@@ -260,7 +268,7 @@ static struct file *vfio_device_open_file(struct vfio_device *device)
return filep;
err_close_device:
- vfio_device_group_close(device);
+ vfio_device_group_close(df);
err_free:
kfree(df);
err_out:
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h
index fdc200b97283..f1da4378269d 100644
--- a/drivers/vfio/vfio.h
+++ b/drivers/vfio/vfio.h
@@ -20,13 +20,13 @@ struct vfio_device_file {
struct vfio_device *device;
spinlock_t kvm_ref_lock; /* protect kvm field */
struct kvm *kvm;
+ struct iommufd_ctx *iommufd; /* protected by struct vfio_device_set::lock */
};
void vfio_device_put_registration(struct vfio_device *device);
bool vfio_device_try_get_registration(struct vfio_device *device);
-int vfio_device_open(struct vfio_device *device, struct iommufd_ctx *iommufd);
-void vfio_device_close(struct vfio_device *device,
- struct iommufd_ctx *iommufd);
+int vfio_device_open(struct vfio_device_file *df);
+void vfio_device_close(struct vfio_device_file *df);
struct vfio_device_file *
vfio_allocate_device_file(struct vfio_device *device);
@@ -91,7 +91,7 @@ void vfio_device_group_register(struct vfio_device *device);
void vfio_device_group_unregister(struct vfio_device *device);
int vfio_device_group_use_iommu(struct vfio_device *device);
void vfio_device_group_unuse_iommu(struct vfio_device *device);
-void vfio_device_group_close(struct vfio_device *device);
+void vfio_device_group_close(struct vfio_device_file *df);
struct vfio_group *vfio_group_from_file(struct file *file);
bool vfio_group_enforced_coherent(struct vfio_group *group);
void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm);
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index d92aac2f7a8e..1a6d163f0e02 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -423,9 +423,10 @@ vfio_allocate_device_file(struct vfio_device *device)
return df;
}
-static int vfio_device_first_open(struct vfio_device *device,
- struct iommufd_ctx *iommufd)
+static int vfio_device_first_open(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
+ struct iommufd_ctx *iommufd = df->iommufd;
int ret;
lockdep_assert_held(&device->dev_set->lock);
@@ -457,9 +458,11 @@ static int vfio_device_first_open(struct vfio_device *device,
return ret;
}
-static void vfio_device_last_close(struct vfio_device *device,
- struct iommufd_ctx *iommufd)
+static void vfio_device_last_close(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
+ struct iommufd_ctx *iommufd = df->iommufd;
+
lockdep_assert_held(&device->dev_set->lock);
if (device->ops->close_device)
@@ -471,15 +474,16 @@ static void vfio_device_last_close(struct vfio_device *device,
module_put(device->dev->driver->owner);
}
-int vfio_device_open(struct vfio_device *device, struct iommufd_ctx *iommufd)
+int vfio_device_open(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
int ret = 0;
lockdep_assert_held(&device->dev_set->lock);
device->open_count++;
if (device->open_count == 1) {
- ret = vfio_device_first_open(device, iommufd);
+ ret = vfio_device_first_open(df);
if (ret)
device->open_count--;
}
@@ -487,14 +491,15 @@ int vfio_device_open(struct vfio_device *device, struct iommufd_ctx *iommufd)
return ret;
}
-void vfio_device_close(struct vfio_device *device,
- struct iommufd_ctx *iommufd)
+void vfio_device_close(struct vfio_device_file *df)
{
+ struct vfio_device *device = df->device;
+
lockdep_assert_held(&device->dev_set->lock);
vfio_assert_device_open(device);
if (device->open_count == 1)
- vfio_device_last_close(device, iommufd);
+ vfio_device_last_close(df);
device->open_count--;
}
@@ -539,7 +544,7 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep)
struct vfio_device_file *df = filep->private_data;
struct vfio_device *device = df->device;
- vfio_device_group_close(device);
+ vfio_device_group_close(df);
vfio_device_put_registration(device);
--
2.34.1
next prev parent reply other threads:[~2023-04-26 15:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-26 15:02 [PATCH v10 00/22] Add vfio_device cdev for iommufd support Yi Liu
2023-04-26 15:03 ` [PATCH v10 01/22] vfio: Allocate per device file structure Yi Liu
2023-04-26 15:03 ` [PATCH v10 02/22] vfio: Refine vfio file kAPIs for KVM Yi Liu
2023-04-26 15:03 ` [PATCH v10 03/22] vfio: Accept vfio device file in the KVM facing kAPI Yi Liu
2023-04-26 15:03 ` [PATCH v10 04/22] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu
2023-04-26 15:03 ` [PATCH v10 05/22] kvm/vfio: Accept vfio device file from userspace Yi Liu
2023-05-11 7:11 ` Cédric Le Goater
2023-05-12 7:57 ` Liu, Yi L
2023-04-26 15:03 ` Yi Liu [this message]
2023-04-26 15:03 ` [PATCH v10 07/22] vfio: Block device access via device fd until device is opened Yi Liu
2023-04-26 15:03 ` [PATCH v10 08/22] vfio: Add cdev_device_open_cnt to vfio_group Yi Liu
2023-04-26 15:03 ` [PATCH v10 09/22] vfio: Make vfio_device_open() single open for device cdev path Yi Liu
2023-04-26 15:03 ` [PATCH v10 10/22] vfio-iommufd: Move noiommu compat probe out of vfio_iommufd_bind() Yi Liu
2023-04-26 15:03 ` [PATCH v10 11/22] vfio-iommufd: Split bind/attach into two steps Yi Liu
2023-04-26 15:03 ` [PATCH v10 12/22] vfio: Record devid in vfio_device_file Yi Liu
2023-04-26 15:03 ` [PATCH v10 13/22] vfio-iommufd: Add detach_ioas support for physical VFIO devices Yi Liu
2023-04-26 15:03 ` [PATCH v10 14/22] iommufd/device: Add iommufd_access_detach() API Yi Liu
2023-04-26 15:03 ` [PATCH v10 15/22] vfio-iommufd: Add detach_ioas support for emulated VFIO devices Yi Liu
2023-04-26 15:03 ` [PATCH v10 16/22] vfio: Name noiommu vfio_device with "noiommu-" prefix Yi Liu
2023-04-26 15:03 ` [PATCH v10 17/22] vfio: Move vfio_device_group_unregister() to be the first operation in unregister Yi Liu
2023-04-26 15:03 ` [PATCH v10 18/22] vfio: Add cdev for vfio_device Yi Liu
2023-04-26 15:03 ` [PATCH v10 19/22] vfio: Add VFIO_DEVICE_BIND_IOMMUFD Yi Liu
2023-04-26 15:03 ` [PATCH v10 20/22] vfio: Add VFIO_DEVICE_[AT|DE]TACH_IOMMUFD_PT Yi Liu
2023-04-26 15:03 ` [PATCH v10 21/22] vfio: Compile group optionally Yi Liu
2023-04-26 15:03 ` [PATCH v10 22/22] docs: vfio: Add vfio device cdev description Yi Liu
2023-04-28 9:29 ` [PATCH v10 00/22] Add vfio_device cdev for iommufd support Jiang, Yanting
2023-04-28 15:11 ` Shameerali Kolothum Thodi
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