From: Jason Gunthorpe <jgg@nvidia.com>
To: Alex Williamson <alex.williamson@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Diana Craciun <diana.craciun@oss.nxp.com>,
Eric Auger <eric.auger@redhat.com>,
kvm@vger.kernel.org, Kirti Wankhede <kwankhede@nvidia.com>,
linux-doc@vger.kernel.org
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
Cornelia Huck <cohuck@redhat.com>,
Dan Williams <dan.j.williams@intel.com>,
Daniel Vetter <daniel@ffwll.ch>, Christoph Hellwig <hch@lst.de>,
Leon Romanovsky <leonro@nvidia.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
Tarun Gupta <targupta@nvidia.com>
Subject: [PATCH v3 12/14] vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *'
Date: Tue, 23 Mar 2021 13:15:04 -0300 [thread overview]
Message-ID: <12-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> (raw)
In-Reply-To: <0-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com>
This is the standard kernel pattern, the ops associated with a struct get
the struct pointer in for typesafety. The expected design is to use
container_of to cleanly go from the subsystem level type to the driver
level type without having any type erasure in a void *.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
Documentation/driver-api/vfio.rst | 18 ++++----
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 36 +++++++++------
drivers/vfio/mdev/vfio_mdev.c | 33 +++++++-------
drivers/vfio/pci/vfio_pci.c | 47 ++++++++++++--------
drivers/vfio/platform/vfio_platform_common.c | 33 ++++++++------
drivers/vfio/vfio.c | 20 ++++-----
include/linux/vfio.h | 16 +++----
7 files changed, 117 insertions(+), 86 deletions(-)
diff --git a/Documentation/driver-api/vfio.rst b/Documentation/driver-api/vfio.rst
index d3a02300913a7f..3337f337293a32 100644
--- a/Documentation/driver-api/vfio.rst
+++ b/Documentation/driver-api/vfio.rst
@@ -269,20 +269,22 @@ ready before calling it. The driver provides an ops structure for callbacks
similar to a file operations structure::
struct vfio_device_ops {
- int (*open)(void *device_data);
- void (*release)(void *device_data);
- ssize_t (*read)(void *device_data, char __user *buf,
+ int (*open)(struct vfio_device *vdev);
+ void (*release)(struct vfio_device *vdev);
+ ssize_t (*read)(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos);
- ssize_t (*write)(void *device_data, const char __user *buf,
+ ssize_t (*write)(struct vfio_device *vdev,
+ const char __user *buf,
size_t size, loff_t *ppos);
- long (*ioctl)(void *device_data, unsigned int cmd,
+ long (*ioctl)(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg);
- int (*mmap)(void *device_data, struct vm_area_struct *vma);
+ int (*mmap)(struct vfio_device *vdev,
+ struct vm_area_struct *vma);
};
-Each function is passed the device_data that was originally registered
+Each function is passed the vdev that was originally registered
in the vfio_register_group_dev() call above. This allows the bus driver
-an easy place to store its opaque, private data. The open/release
+to obtain its private data using container_of(). The open/release
callbacks are issued when a new file descriptor is created for a
device (via VFIO_GROUP_GET_DEVICE_FD). The ioctl interface provides
a direct pass through for VFIO_DEVICE_* ioctls. The read/write/mmap
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index ad6c6feeeb4b2a..45f397c04a8959 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -135,9 +135,10 @@ static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
kfree(vdev->regions);
}
-static int vfio_fsl_mc_open(void *device_data)
+static int vfio_fsl_mc_open(struct vfio_device *core_vdev)
{
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
int ret;
if (!try_module_get(THIS_MODULE))
@@ -161,9 +162,10 @@ static int vfio_fsl_mc_open(void *device_data)
return ret;
}
-static void vfio_fsl_mc_release(void *device_data)
+static void vfio_fsl_mc_release(struct vfio_device *core_vdev)
{
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
int ret;
mutex_lock(&vdev->reflck->lock);
@@ -197,11 +199,12 @@ static void vfio_fsl_mc_release(void *device_data)
module_put(THIS_MODULE);
}
-static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
- unsigned long arg)
+static long vfio_fsl_mc_ioctl(struct vfio_device *core_vdev,
+ unsigned int cmd, unsigned long arg)
{
unsigned long minsz;
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
struct fsl_mc_device *mc_dev = vdev->mc_dev;
switch (cmd) {
@@ -327,10 +330,11 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
}
}
-static ssize_t vfio_fsl_mc_read(void *device_data, char __user *buf,
+static ssize_t vfio_fsl_mc_read(struct vfio_device *core_vdev, char __user *buf,
size_t count, loff_t *ppos)
{
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
struct fsl_mc_device *mc_dev = vdev->mc_dev;
@@ -404,10 +408,12 @@ static int vfio_fsl_mc_send_command(void __iomem *ioaddr, uint64_t *cmd_data)
return 0;
}
-static ssize_t vfio_fsl_mc_write(void *device_data, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t vfio_fsl_mc_write(struct vfio_device *core_vdev,
+ const char __user *buf, size_t count,
+ loff_t *ppos)
{
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
struct fsl_mc_device *mc_dev = vdev->mc_dev;
@@ -468,9 +474,11 @@ static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
size, vma->vm_page_prot);
}
-static int vfio_fsl_mc_mmap(void *device_data, struct vm_area_struct *vma)
+static int vfio_fsl_mc_mmap(struct vfio_device *core_vdev,
+ struct vm_area_struct *vma)
{
- struct vfio_fsl_mc_device *vdev = device_data;
+ struct vfio_fsl_mc_device *vdev =
+ container_of(core_vdev, struct vfio_fsl_mc_device, vdev);
struct fsl_mc_device *mc_dev = vdev->mc_dev;
unsigned int index;
diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c
index 4043cc91f9524e..11b3e15403ba4f 100644
--- a/drivers/vfio/mdev/vfio_mdev.c
+++ b/drivers/vfio/mdev/vfio_mdev.c
@@ -21,10 +21,11 @@
#define DRIVER_AUTHOR "NVIDIA Corporation"
#define DRIVER_DESC "VFIO based driver for Mediated device"
-static int vfio_mdev_open(void *device_data)
+static int vfio_mdev_open(struct vfio_device *core_vdev)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
+
int ret;
if (unlikely(!parent->ops->open))
@@ -40,9 +41,9 @@ static int vfio_mdev_open(void *device_data)
return ret;
}
-static void vfio_mdev_release(void *device_data)
+static void vfio_mdev_release(struct vfio_device *core_vdev)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (likely(parent->ops->release))
@@ -51,10 +52,10 @@ static void vfio_mdev_release(void *device_data)
module_put(THIS_MODULE);
}
-static long vfio_mdev_unlocked_ioctl(void *device_data,
+static long vfio_mdev_unlocked_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->ioctl))
@@ -63,10 +64,10 @@ static long vfio_mdev_unlocked_ioctl(void *device_data,
return parent->ops->ioctl(mdev, cmd, arg);
}
-static ssize_t vfio_mdev_read(void *device_data, char __user *buf,
+static ssize_t vfio_mdev_read(struct vfio_device *core_vdev, char __user *buf,
size_t count, loff_t *ppos)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->read))
@@ -75,10 +76,11 @@ static ssize_t vfio_mdev_read(void *device_data, char __user *buf,
return parent->ops->read(mdev, buf, count, ppos);
}
-static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t vfio_mdev_write(struct vfio_device *core_vdev,
+ const char __user *buf, size_t count,
+ loff_t *ppos)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->write))
@@ -87,9 +89,10 @@ static ssize_t vfio_mdev_write(void *device_data, const char __user *buf,
return parent->ops->write(mdev, buf, count, ppos);
}
-static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma)
+static int vfio_mdev_mmap(struct vfio_device *core_vdev,
+ struct vm_area_struct *vma)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (unlikely(!parent->ops->mmap))
@@ -98,9 +101,9 @@ static int vfio_mdev_mmap(void *device_data, struct vm_area_struct *vma)
return parent->ops->mmap(mdev, vma);
}
-static void vfio_mdev_request(void *device_data, unsigned int count)
+static void vfio_mdev_request(struct vfio_device *core_vdev, unsigned int count)
{
- struct mdev_device *mdev = device_data;
+ struct mdev_device *mdev = to_mdev_device(core_vdev->dev);
struct mdev_parent *parent = mdev->parent;
if (parent->ops->request)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index a0ac20a499cf6c..5f1a782d1c65ae 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -553,9 +553,10 @@ static void vfio_pci_vf_token_user_add(struct vfio_pci_device *vdev, int val)
vfio_device_put(pf_dev);
}
-static void vfio_pci_release(void *device_data)
+static void vfio_pci_release(struct vfio_device *core_vdev)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
mutex_lock(&vdev->reflck->lock);
@@ -581,9 +582,10 @@ static void vfio_pci_release(void *device_data)
module_put(THIS_MODULE);
}
-static int vfio_pci_open(void *device_data)
+static int vfio_pci_open(struct vfio_device *core_vdev)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
int ret = 0;
if (!try_module_get(THIS_MODULE))
@@ -797,10 +799,11 @@ struct vfio_devices {
int max_index;
};
-static long vfio_pci_ioctl(void *device_data,
+static long vfio_pci_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
unsigned long minsz;
if (cmd == VFIO_DEVICE_GET_INFO) {
@@ -1402,11 +1405,10 @@ static long vfio_pci_ioctl(void *device_data,
return -ENOTTY;
}
-static ssize_t vfio_pci_rw(void *device_data, char __user *buf,
+static ssize_t vfio_pci_rw(struct vfio_pci_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
{
unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos);
- struct vfio_pci_device *vdev = device_data;
if (index >= VFIO_PCI_NUM_REGIONS + vdev->num_regions)
return -EINVAL;
@@ -1434,22 +1436,28 @@ static ssize_t vfio_pci_rw(void *device_data, char __user *buf,
return -EINVAL;
}
-static ssize_t vfio_pci_read(void *device_data, char __user *buf,
+static ssize_t vfio_pci_read(struct vfio_device *core_vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
+
if (!count)
return 0;
- return vfio_pci_rw(device_data, buf, count, ppos, false);
+ return vfio_pci_rw(vdev, buf, count, ppos, false);
}
-static ssize_t vfio_pci_write(void *device_data, const char __user *buf,
+static ssize_t vfio_pci_write(struct vfio_device *core_vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
+
if (!count)
return 0;
- return vfio_pci_rw(device_data, (char __user *)buf, count, ppos, true);
+ return vfio_pci_rw(vdev, (char __user *)buf, count, ppos, true);
}
/* Return 1 on zap and vma_lock acquired, 0 on contention (only with @try) */
@@ -1646,9 +1654,10 @@ static const struct vm_operations_struct vfio_pci_mmap_ops = {
.fault = vfio_pci_mmap_fault,
};
-static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma)
+static int vfio_pci_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
struct pci_dev *pdev = vdev->pdev;
unsigned int index;
u64 phys_len, req_len, pgoff, req_start;
@@ -1714,9 +1723,10 @@ static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma)
return 0;
}
-static void vfio_pci_request(void *device_data, unsigned int count)
+static void vfio_pci_request(struct vfio_device *core_vdev, unsigned int count)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
struct pci_dev *pdev = vdev->pdev;
mutex_lock(&vdev->igate);
@@ -1830,9 +1840,10 @@ static int vfio_pci_validate_vf_token(struct vfio_pci_device *vdev,
#define VF_TOKEN_ARG "vf_token="
-static int vfio_pci_match(void *device_data, char *buf)
+static int vfio_pci_match(struct vfio_device *core_vdev, char *buf)
{
- struct vfio_pci_device *vdev = device_data;
+ struct vfio_pci_device *vdev =
+ container_of(core_vdev, struct vfio_pci_device, vdev);
bool vf_token = false;
uuid_t uuid;
int ret;
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index 6eb749250ee41c..f5f6b537084a67 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -218,9 +218,10 @@ static int vfio_platform_call_reset(struct vfio_platform_device *vdev,
return -EINVAL;
}
-static void vfio_platform_release(void *device_data)
+static void vfio_platform_release(struct vfio_device *core_vdev)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
mutex_lock(&driver_lock);
@@ -244,9 +245,10 @@ static void vfio_platform_release(void *device_data)
module_put(vdev->parent_module);
}
-static int vfio_platform_open(void *device_data)
+static int vfio_platform_open(struct vfio_device *core_vdev)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
int ret;
if (!try_module_get(vdev->parent_module))
@@ -293,10 +295,12 @@ static int vfio_platform_open(void *device_data)
return ret;
}
-static long vfio_platform_ioctl(void *device_data,
+static long vfio_platform_ioctl(struct vfio_device *core_vdev,
unsigned int cmd, unsigned long arg)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
+
unsigned long minsz;
if (cmd == VFIO_DEVICE_GET_INFO) {
@@ -455,10 +459,11 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region *reg,
return -EFAULT;
}
-static ssize_t vfio_platform_read(void *device_data, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t vfio_platform_read(struct vfio_device *core_vdev,
+ char __user *buf, size_t count, loff_t *ppos)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
unsigned int index = VFIO_PLATFORM_OFFSET_TO_INDEX(*ppos);
loff_t off = *ppos & VFIO_PLATFORM_OFFSET_MASK;
@@ -531,10 +536,11 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region *reg,
return -EFAULT;
}
-static ssize_t vfio_platform_write(void *device_data, const char __user *buf,
+static ssize_t vfio_platform_write(struct vfio_device *core_vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
unsigned int index = VFIO_PLATFORM_OFFSET_TO_INDEX(*ppos);
loff_t off = *ppos & VFIO_PLATFORM_OFFSET_MASK;
@@ -573,9 +579,10 @@ static int vfio_platform_mmap_mmio(struct vfio_platform_region region,
req_len, vma->vm_page_prot);
}
-static int vfio_platform_mmap(void *device_data, struct vm_area_struct *vma)
+static int vfio_platform_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma)
{
- struct vfio_platform_device *vdev = device_data;
+ struct vfio_platform_device *vdev =
+ container_of(core_vdev, struct vfio_platform_device, vdev);
unsigned int index;
index = vma->vm_pgoff >> (VFIO_PLATFORM_OFFSET_SHIFT - PAGE_SHIFT);
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 180b4ab02d115a..e6f5109fba4858 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -832,7 +832,7 @@ static struct vfio_device *vfio_device_get_from_name(struct vfio_group *group,
int ret;
if (it->ops->match) {
- ret = it->ops->match(it->device_data, buf);
+ ret = it->ops->match(it, buf);
if (ret < 0) {
device = ERR_PTR(ret);
break;
@@ -893,7 +893,7 @@ void vfio_unregister_group_dev(struct vfio_device *device)
rc = try_wait_for_completion(&device->comp);
while (rc <= 0) {
if (device->ops->request)
- device->ops->request(device->device_data, i++);
+ device->ops->request(device, i++);
if (interrupted) {
rc = wait_for_completion_timeout(&device->comp,
@@ -1379,7 +1379,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
if (IS_ERR(device))
return PTR_ERR(device);
- ret = device->ops->open(device->device_data);
+ ret = device->ops->open(device);
if (ret) {
vfio_device_put(device);
return ret;
@@ -1391,7 +1391,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
*/
ret = get_unused_fd_flags(O_CLOEXEC);
if (ret < 0) {
- device->ops->release(device->device_data);
+ device->ops->release(device);
vfio_device_put(device);
return ret;
}
@@ -1401,7 +1401,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
if (IS_ERR(filep)) {
put_unused_fd(ret);
ret = PTR_ERR(filep);
- device->ops->release(device->device_data);
+ device->ops->release(device);
vfio_device_put(device);
return ret;
}
@@ -1558,7 +1558,7 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep)
{
struct vfio_device *device = filep->private_data;
- device->ops->release(device->device_data);
+ device->ops->release(device);
vfio_group_try_dissolve_container(device->group);
@@ -1575,7 +1575,7 @@ static long vfio_device_fops_unl_ioctl(struct file *filep,
if (unlikely(!device->ops->ioctl))
return -EINVAL;
- return device->ops->ioctl(device->device_data, cmd, arg);
+ return device->ops->ioctl(device, cmd, arg);
}
static ssize_t vfio_device_fops_read(struct file *filep, char __user *buf,
@@ -1586,7 +1586,7 @@ static ssize_t vfio_device_fops_read(struct file *filep, char __user *buf,
if (unlikely(!device->ops->read))
return -EINVAL;
- return device->ops->read(device->device_data, buf, count, ppos);
+ return device->ops->read(device, buf, count, ppos);
}
static ssize_t vfio_device_fops_write(struct file *filep,
@@ -1598,7 +1598,7 @@ static ssize_t vfio_device_fops_write(struct file *filep,
if (unlikely(!device->ops->write))
return -EINVAL;
- return device->ops->write(device->device_data, buf, count, ppos);
+ return device->ops->write(device, buf, count, ppos);
}
static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma)
@@ -1608,7 +1608,7 @@ static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma)
if (unlikely(!device->ops->mmap))
return -EINVAL;
- return device->ops->mmap(device->device_data, vma);
+ return device->ops->mmap(device, vma);
}
static const struct file_operations vfio_device_fops = {
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 4995faf51efeae..784c34c0a28763 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -44,17 +44,17 @@ struct vfio_device {
*/
struct vfio_device_ops {
char *name;
- int (*open)(void *device_data);
- void (*release)(void *device_data);
- ssize_t (*read)(void *device_data, char __user *buf,
+ int (*open)(struct vfio_device *vdev);
+ void (*release)(struct vfio_device *vdev);
+ ssize_t (*read)(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos);
- ssize_t (*write)(void *device_data, const char __user *buf,
+ ssize_t (*write)(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *size);
- long (*ioctl)(void *device_data, unsigned int cmd,
+ long (*ioctl)(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg);
- int (*mmap)(void *device_data, struct vm_area_struct *vma);
- void (*request)(void *device_data, unsigned int count);
- int (*match)(void *device_data, char *buf);
+ int (*mmap)(struct vfio_device *vdev, struct vm_area_struct *vma);
+ void (*request)(struct vfio_device *vdev, unsigned int count);
+ int (*match)(struct vfio_device *vdev, char *buf);
};
extern struct iommu_group *vfio_iommu_group_get(struct device *dev);
--
2.31.0
next prev parent reply other threads:[~2021-03-23 16:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 16:14 [PATCH v3 00/14] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 01/14] vfio: Remove extra put/gets around vfio_device->group Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 02/14] vfio: Simplify the lifetime logic for vfio_device Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 03/14] vfio: Split creation of a vfio_device into init and register ops Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 04/14] vfio/platform: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 05/14] vfio/fsl-mc: Re-order vfio_fsl_mc_probe() Jason Gunthorpe
2021-03-26 16:54 ` Diana Craciun OSS
2021-03-23 16:14 ` [PATCH v3 06/14] vfio/fsl-mc: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-23 16:14 ` [PATCH v3 07/14] vfio/pci: Move VGA and VF initialization to functions Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 08/14] vfio/pci: Re-order vfio_pci_probe() Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 09/14] vfio/pci: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 10/14] vfio/mdev: " Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 11/14] vfio/mdev: Make to_mdev_device() into a static inline Jason Gunthorpe
2021-03-23 16:15 ` Jason Gunthorpe [this message]
2021-03-23 16:15 ` [PATCH v3 13/14] vfio/pci: Replace uses of vfio_device_data() with container_of Jason Gunthorpe
2021-03-23 16:15 ` [PATCH v3 14/14] vfio: Remove device_data from the vfio bus driver API Jason Gunthorpe
2021-04-06 15:57 ` [PATCH v3 00/14] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-04-06 19:38 ` Alex Williamson
2021-04-06 19:45 ` Jason Gunthorpe
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