summaryrefslogtreecommitdiff
path: root/samples
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2021-07-03 11:49:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-03 11:49:33 -0700
commit8e8d9442d1139d05d0c3b83efa34c4b7693d2969 (patch)
tree33af777d1e177b0f950a406ae7c8a2dac2147dbc /samples
parent58ec9059b396a570b208239b4edc45eeb68b14c4 (diff)
parent6a45ece4c9af473555f01f0f8b97eba56e3c7d0d (diff)
Merge tag 'vfio-v5.14-rc1' of git://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson: - Module reference fixes, structure renaming (Max Gurtovoy) - Export and use common pci_dev_trylock() (Luis Chamberlain) - Enable direct mdev device creation and probing by parent (Christoph Hellwig & Jason Gunthorpe) - Fix mdpy error path leak (Colin Ian King) - Fix mtty list entry leak (Jason Gunthorpe) - Enforce mtty device limit (Alex Williamson) - Resolve concurrent vfio-pci mmap faults (Alex Williamson) * tag 'vfio-v5.14-rc1' of git://github.com/awilliam/linux-vfio: vfio/pci: Handle concurrent vma faults vfio/mtty: Enforce available_instances vfio/mtty: Delete mdev_devices_list vfio: use the new pci_dev_trylock() helper to simplify try lock PCI: Export pci_dev_trylock() and pci_dev_unlock() vfio/mdpy: Fix memory leak of object mdev_state->vconfig vfio/iommu_type1: rename vfio_group struck to vfio_iommu_group vfio/mbochs: Convert to use vfio_register_group_dev() vfio/mdpy: Convert to use vfio_register_group_dev() vfio/mtty: Convert to use vfio_register_group_dev() vfio/mdev: Allow the mdev_parent_ops to specify the device driver to bind vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE driver core: Export device_driver_attach() driver core: Don't return EPROBE_DEFER to userspace during sysfs bind driver core: Flow the return code from ->probe() through to sysfs bind driver core: Better distinguish probe errors in really_probe driver core: Pull required checks into driver_probe_device() vfio/platform: remove unneeded parent_module attribute vfio: centralize module refcount in subsystem layer
Diffstat (limited to 'samples')
-rw-r--r--samples/Kconfig6
-rw-r--r--samples/vfio-mdev/mbochs.c163
-rw-r--r--samples/vfio-mdev/mdpy.c160
-rw-r--r--samples/vfio-mdev/mtty.c219
4 files changed, 282 insertions, 266 deletions
diff --git a/samples/Kconfig b/samples/Kconfig
index b5a1a7aa7e23..b0503ef058d3 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -154,14 +154,14 @@ config SAMPLE_UHID
config SAMPLE_VFIO_MDEV_MTTY
tristate "Build VFIO mtty example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
help
Build a virtual tty sample driver for use as a VFIO
mediated device
config SAMPLE_VFIO_MDEV_MDPY
tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
help
Build a virtual display sample driver for use as a VFIO
mediated device. It is a simple framebuffer and supports
@@ -178,7 +178,7 @@ config SAMPLE_VFIO_MDEV_MDPY_FB
config SAMPLE_VFIO_MDEV_MBOCHS
tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
- depends on VFIO_MDEV_DEVICE && m
+ depends on VFIO_MDEV && m
select DMA_SHARED_BUFFER
help
Build a virtual display sample driver for use as a VFIO
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 881ef9a7296f..6c0f229db36a 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -130,6 +130,7 @@ static struct class *mbochs_class;
static struct cdev mbochs_cdev;
static struct device mbochs_dev;
static int mbochs_used_mbytes;
+static const struct vfio_device_ops mbochs_dev_ops;
struct vfio_region_info_ext {
struct vfio_region_info base;
@@ -160,6 +161,7 @@ struct mbochs_dmabuf {
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
u8 *vconfig;
u64 bar_mask[3];
u32 memory_bar_mask;
@@ -425,11 +427,9 @@ static void handle_edid_blob(struct mdev_state *mdev_state, u16 offset,
memcpy(buf, mdev_state->edid_blob + offset, count);
}
-static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
- loff_t pos, bool is_write)
+static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf,
+ size_t count, loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
struct page *pg;
loff_t poff;
char *map;
@@ -478,7 +478,7 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
put_page(pg);
} else {
- dev_dbg(dev, "%s: %s @0x%llx (unhandled)\n",
+ dev_dbg(mdev_state->vdev.dev, "%s: %s @0x%llx (unhandled)\n",
__func__, is_write ? "WR" : "RD", pos);
ret = -1;
goto accessfailed;
@@ -493,9 +493,8 @@ accessfailed:
return ret;
}
-static int mbochs_reset(struct mdev_device *mdev)
+static int mbochs_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
u32 size64k = mdev_state->memsize / (64 * 1024);
int i;
@@ -506,12 +505,13 @@ static int mbochs_reset(struct mdev_device *mdev)
return 0;
}
-static int mbochs_create(struct mdev_device *mdev)
+static int mbochs_probe(struct mdev_device *mdev)
{
const struct mbochs_type *type =
&mbochs_types[mdev_get_type_group_id(mdev)];
struct device *dev = mdev_dev(mdev);
struct mdev_state *mdev_state;
+ int ret = -ENOMEM;
if (type->mbytes + mbochs_used_mbytes > max_mbytes)
return -ENOMEM;
@@ -519,6 +519,7 @@ static int mbochs_create(struct mdev_device *mdev)
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mbochs_dev_ops);
mdev_state->vconfig = kzalloc(MBOCHS_CONFIG_SPACE_SIZE, GFP_KERNEL);
if (mdev_state->vconfig == NULL)
@@ -537,7 +538,6 @@ static int mbochs_create(struct mdev_device *mdev)
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
INIT_LIST_HEAD(&mdev_state->dmabufs);
mdev_state->next_id = 1;
@@ -547,32 +547,38 @@ static int mbochs_create(struct mdev_device *mdev)
mdev_state->edid_regs.edid_offset = MBOCHS_EDID_BLOB_OFFSET;
mdev_state->edid_regs.edid_max_size = sizeof(mdev_state->edid_blob);
mbochs_create_config_space(mdev_state);
- mbochs_reset(mdev);
+ mbochs_reset(mdev_state);
mbochs_used_mbytes += type->mbytes;
+
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret)
+ goto err_mem;
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
err_mem:
kfree(mdev_state->vconfig);
kfree(mdev_state);
- return -ENOMEM;
+ return ret;
}
-static int mbochs_remove(struct mdev_device *mdev)
+static void mbochs_remove(struct mdev_device *mdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
mbochs_used_mbytes -= mdev_state->type->mbytes;
- mdev_set_drvdata(mdev, NULL);
+ vfio_unregister_group_dev(&mdev_state->vdev);
kfree(mdev_state->pages);
kfree(mdev_state->vconfig);
kfree(mdev_state);
- return 0;
}
-static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mbochs_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -582,7 +588,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -594,7 +600,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -606,7 +612,7 @@ static ssize_t mbochs_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -629,9 +635,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mbochs_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -644,7 +652,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -656,7 +664,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -668,7 +676,7 @@ static ssize_t mbochs_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -754,9 +762,10 @@ static const struct vm_operations_struct mbochs_region_vm_ops = {
.fault = mbochs_region_vm_fault,
};
-static int mbochs_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
+static int mbochs_mmap(struct vfio_device *vdev, struct vm_area_struct *vma)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
if (vma->vm_pgoff != MBOCHS_MEMORY_BAR_OFFSET >> PAGE_SHIFT)
return -EINVAL;
@@ -963,7 +972,7 @@ mbochs_dmabuf_find_by_id(struct mdev_state *mdev_state, u32 id)
static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
{
struct mdev_state *mdev_state = dmabuf->mdev_state;
- struct device *dev = mdev_dev(mdev_state->mdev);
+ struct device *dev = mdev_state->vdev.dev;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
struct dma_buf *buf;
@@ -991,15 +1000,10 @@ static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
return 0;
}
-static int mbochs_get_region_info(struct mdev_device *mdev,
+static int mbochs_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info_ext *ext)
{
struct vfio_region_info *region_info = &ext->base;
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
if (region_info->index >= MBOCHS_NUM_REGIONS)
return -EINVAL;
@@ -1047,15 +1051,13 @@ static int mbochs_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mbochs_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mbochs_get_irq_info(struct vfio_irq_info *irq_info)
{
irq_info->count = 0;
return 0;
}
-static int mbochs_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mbochs_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = MBOCHS_NUM_REGIONS;
@@ -1063,11 +1065,9 @@ static int mbochs_get_device_info(struct mdev_device *mdev,
return 0;
}
-static int mbochs_query_gfx_plane(struct mdev_device *mdev,
+static int mbochs_query_gfx_plane(struct mdev_state *mdev_state,
struct vfio_device_gfx_plane_info *plane)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
struct mbochs_dmabuf *dmabuf;
struct mbochs_mode mode;
int ret;
@@ -1121,18 +1121,16 @@ static int mbochs_query_gfx_plane(struct mdev_device *mdev,
done:
if (plane->drm_plane_type == DRM_PLANE_TYPE_PRIMARY &&
mdev_state->active_id != plane->dmabuf_id) {
- dev_dbg(dev, "%s: primary: %d => %d\n", __func__,
- mdev_state->active_id, plane->dmabuf_id);
+ dev_dbg(mdev_state->vdev.dev, "%s: primary: %d => %d\n",
+ __func__, mdev_state->active_id, plane->dmabuf_id);
mdev_state->active_id = plane->dmabuf_id;
}
mutex_unlock(&mdev_state->ops_lock);
return 0;
}
-static int mbochs_get_gfx_dmabuf(struct mdev_device *mdev,
- u32 id)
+static int mbochs_get_gfx_dmabuf(struct mdev_state *mdev_state, u32 id)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
struct mbochs_dmabuf *dmabuf;
mutex_lock(&mdev_state->ops_lock);
@@ -1154,9 +1152,11 @@ static int mbochs_get_gfx_dmabuf(struct mdev_device *mdev,
return dma_buf_fd(dmabuf->buf, 0);
}
-static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
- unsigned long arg)
+static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd,
+ unsigned long arg)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
int ret = 0;
unsigned long minsz, outsz;
@@ -1173,7 +1173,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mbochs_get_device_info(mdev, &info);
+ ret = mbochs_get_device_info(&info);
if (ret)
return ret;
@@ -1197,7 +1197,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (outsz > sizeof(info))
return -EINVAL;
- ret = mbochs_get_region_info(mdev, &info);
+ ret = mbochs_get_region_info(mdev_state, &info);
if (ret)
return ret;
@@ -1220,7 +1220,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= VFIO_PCI_NUM_IRQS))
return -EINVAL;
- ret = mbochs_get_irq_info(mdev, &info);
+ ret = mbochs_get_irq_info(&info);
if (ret)
return ret;
@@ -1243,7 +1243,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (plane.argsz < minsz)
return -EINVAL;
- ret = mbochs_query_gfx_plane(mdev, &plane);
+ ret = mbochs_query_gfx_plane(mdev_state, &plane);
if (ret)
return ret;
@@ -1260,19 +1260,19 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (get_user(dmabuf_id, (__u32 __user *)arg))
return -EFAULT;
- return mbochs_get_gfx_dmabuf(mdev, dmabuf_id);
+ return mbochs_get_gfx_dmabuf(mdev_state, dmabuf_id);
}
case VFIO_DEVICE_SET_IRQS:
return -EINVAL;
case VFIO_DEVICE_RESET:
- return mbochs_reset(mdev);
+ return mbochs_reset(mdev_state);
}
return -ENOTTY;
}
-static int mbochs_open(struct mdev_device *mdev)
+static int mbochs_open(struct vfio_device *vdev)
{
if (!try_module_get(THIS_MODULE))
return -ENODEV;
@@ -1280,9 +1280,10 @@ static int mbochs_open(struct mdev_device *mdev)
return 0;
}
-static void mbochs_close(struct mdev_device *mdev)
+static void mbochs_close(struct vfio_device *vdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
struct mbochs_dmabuf *dmabuf, *tmp;
mutex_lock(&mdev_state->ops_lock);
@@ -1306,8 +1307,7 @@ static ssize_t
memory_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct mdev_device *mdev = mdev_from_dev(dev);
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(dev);
return sprintf(buf, "%d MB\n", mdev_state->type->mbytes);
}
@@ -1398,18 +1398,30 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mbochs_dev_ops = {
+ .open = mbochs_open,
+ .release = mbochs_close,
+ .read = mbochs_read,
+ .write = mbochs_write,
+ .ioctl = mbochs_ioctl,
+ .mmap = mbochs_mmap,
+};
+
+static struct mdev_driver mbochs_driver = {
+ .driver = {
+ .name = "mbochs",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mbochs_probe,
+ .remove = mbochs_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
- .mdev_attr_groups = mdev_dev_groups,
+ .device_driver = &mbochs_driver,
.supported_type_groups = mdev_type_groups,
- .create = mbochs_create,
- .remove = mbochs_remove,
- .open = mbochs_open,
- .release = mbochs_close,
- .read = mbochs_read,
- .write = mbochs_write,
- .ioctl = mbochs_ioctl,
- .mmap = mbochs_mmap,
};
static const struct file_operations vd_fops = {
@@ -1434,11 +1446,15 @@ static int __init mbochs_dev_init(void)
cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK + 1);
pr_info("%s: major %d\n", __func__, MAJOR(mbochs_devt));
+ ret = mdev_register_driver(&mbochs_driver);
+ if (ret)
+ goto err_cdev;
+
mbochs_class = class_create(THIS_MODULE, MBOCHS_CLASS_NAME);
if (IS_ERR(mbochs_class)) {
pr_err("Error: failed to register mbochs_dev class\n");
ret = PTR_ERR(mbochs_class);
- goto failed1;
+ goto err_driver;
}
mbochs_dev.class = mbochs_class;
mbochs_dev.release = mbochs_device_release;
@@ -1446,19 +1462,21 @@ static int __init mbochs_dev_init(void)
ret = device_register(&mbochs_dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mbochs_dev, &mdev_fops);
if (ret)
- goto failed3;
+ goto err_device;
return 0;
-failed3:
+err_device:
device_unregister(&mbochs_dev);
-failed2:
+err_class:
class_destroy(mbochs_class);
-failed1:
+err_driver:
+ mdev_unregister_driver(&mbochs_driver);
+err_cdev:
cdev_del(&mbochs_cdev);
unregister_chrdev_region(mbochs_devt, MINORMASK + 1);
return ret;
@@ -1470,6 +1488,7 @@ static void __exit mbochs_dev_exit(void)
mdev_unregister_device(&mbochs_dev);
device_unregister(&mbochs_dev);
+ mdev_unregister_driver(&mbochs_driver);
cdev_del(&mbochs_cdev);
unregister_chrdev_region(mbochs_devt, MINORMASK + 1);
class_destroy(mbochs_class);
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index e889c1cf8fd1..393c9df6f6a0 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -85,9 +85,11 @@ static struct class *mdpy_class;
static struct cdev mdpy_cdev;
static struct device mdpy_dev;
static u32 mdpy_count;
+static const struct vfio_device_ops mdpy_dev_ops;
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
u8 *vconfig;
u32 bar_mask;
struct mutex ops_lock;
@@ -162,11 +164,9 @@ static void handle_pci_cfg_write(struct mdev_state *mdev_state, u16 offset,
}
}
-static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
- loff_t pos, bool is_write)
+static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf,
+ size_t count, loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
int ret = 0;
mutex_lock(&mdev_state->ops_lock);
@@ -187,8 +187,9 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
memcpy(buf, mdev_state->memblk, count);
} else {
- dev_info(dev, "%s: %s @0x%llx (unhandled)\n",
- __func__, is_write ? "WR" : "RD", pos);
+ dev_info(mdev_state->vdev.dev,
+ "%s: %s @0x%llx (unhandled)\n", __func__,
+ is_write ? "WR" : "RD", pos);
ret = -1;
goto accessfailed;
}
@@ -202,9 +203,8 @@ accessfailed:
return ret;
}
-static int mdpy_reset(struct mdev_device *mdev)
+static int mdpy_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
u32 stride, i;
/* initialize with gray gradient */
@@ -216,13 +216,14 @@ static int mdpy_reset(struct mdev_device *mdev)
return 0;
}
-static int mdpy_create(struct mdev_device *mdev)
+static int mdpy_probe(struct mdev_device *mdev)
{
const struct mdpy_type *type =
&mdpy_types[mdev_get_type_group_id(mdev)];
struct device *dev = mdev_dev(mdev);
struct mdev_state *mdev_state;
u32 fbsize;
+ int ret;
if (mdpy_count >= max_devices)
return -ENOMEM;
@@ -230,6 +231,7 @@ static int mdpy_create(struct mdev_device *mdev)
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
if (mdev_state == NULL)
return -ENOMEM;
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mdpy_dev_ops);
mdev_state->vconfig = kzalloc(MDPY_CONFIG_SPACE_SIZE, GFP_KERNEL);
if (mdev_state->vconfig == NULL) {
@@ -250,36 +252,42 @@ static int mdpy_create(struct mdev_device *mdev)
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
-
mdev_state->type = type;
mdev_state->memsize = fbsize;
mdpy_create_config_space(mdev_state);
- mdpy_reset(mdev);
+ mdpy_reset(mdev_state);
mdpy_count++;
+
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret) {
+ kfree(mdev_state->vconfig);
+ kfree(mdev_state);
+ return ret;
+ }
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
}
-static int mdpy_remove(struct mdev_device *mdev)
+static void mdpy_remove(struct mdev_device *mdev)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- struct device *dev = mdev_dev(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
- dev_info(dev, "%s\n", __func__);
+ dev_info(&mdev->dev, "%s\n", __func__);
- mdev_set_drvdata(mdev, NULL);
+ vfio_unregister_group_dev(&mdev_state->vdev);
vfree(mdev_state->memblk);
kfree(mdev_state->vconfig);
kfree(mdev_state);
mdpy_count--;
- return 0;
}
-static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -289,8 +297,8 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
- *ppos, false);
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
+ *ppos, false);
if (ret <= 0)
goto read_err;
@@ -301,7 +309,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -313,7 +321,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -336,9 +344,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mdpy_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -351,7 +361,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -363,7 +373,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -375,7 +385,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (char *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -393,9 +403,10 @@ write_err:
return -EFAULT;
}
-static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
+static int mdpy_mmap(struct vfio_device *vdev, struct vm_area_struct *vma)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
if (vma->vm_pgoff != MDPY_MEMORY_BAR_OFFSET >> PAGE_SHIFT)
return -EINVAL;
@@ -409,16 +420,10 @@ static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
return remap_vmalloc_range(vma, mdev_state->memblk, 0);
}
-static int mdpy_get_region_info(struct mdev_device *mdev,
+static int mdpy_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info *region_info,
u16 *cap_type_id, void **cap_type)
{
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
if (region_info->index >= VFIO_PCI_NUM_REGIONS &&
region_info->index != MDPY_DISPLAY_REGION)
return -EINVAL;
@@ -447,15 +452,13 @@ static int mdpy_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mdpy_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mdpy_get_irq_info(struct vfio_irq_info *irq_info)
{
irq_info->count = 0;
return 0;
}
-static int mdpy_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mdpy_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
@@ -463,11 +466,9 @@ static int mdpy_get_device_info(struct mdev_device *mdev,
return 0;
}
-static int mdpy_query_gfx_plane(struct mdev_device *mdev,
+static int mdpy_query_gfx_plane(struct mdev_state *mdev_state,
struct vfio_device_gfx_plane_info *plane)
{
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
-
if (plane->flags & VFIO_GFX_PLANE_TYPE_PROBE) {
if (plane->flags == (VFIO_GFX_PLANE_TYPE_PROBE |
VFIO_GFX_PLANE_TYPE_REGION))
@@ -496,14 +497,13 @@ static int mdpy_query_gfx_plane(struct mdev_device *mdev,
return 0;
}
-static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
+static long mdpy_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg)
{
int ret = 0;
unsigned long minsz;
- struct mdev_state *mdev_state;
-
- mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
@@ -518,7 +518,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mdpy_get_device_info(mdev, &info);
+ ret = mdpy_get_device_info(&info);
if (ret)
return ret;
@@ -543,7 +543,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mdpy_get_region_info(mdev, &info, &cap_type_id,
+ ret = mdpy_get_region_info(mdev_state, &info, &cap_type_id,
&cap_type);
if (ret)
return ret;
@@ -567,7 +567,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= mdev_state->dev_info.num_irqs))
return -EINVAL;
- ret = mdpy_get_irq_info(mdev, &info);
+ ret = mdpy_get_irq_info(&info);
if (ret)
return ret;
@@ -590,7 +590,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (plane.argsz < minsz)
return -EINVAL;
- ret = mdpy_query_gfx_plane(mdev, &plane);
+ ret = mdpy_query_gfx_plane(mdev_state, &plane);
if (ret)
return ret;
@@ -604,12 +604,12 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
return -EINVAL;
case VFIO_DEVICE_RESET:
- return mdpy_reset(mdev);
+ return mdpy_reset(mdev_state);
}
return -ENOTTY;
}
-static int mdpy_open(struct mdev_device *mdev)
+static int mdpy_open(struct vfio_device *vdev)
{
if (!try_module_get(THIS_MODULE))
return -ENODEV;
@@ -617,7 +617,7 @@ static int mdpy_open(struct mdev_device *mdev)
return 0;
}
-static void mdpy_close(struct mdev_device *mdev)
+static void mdpy_close(struct vfio_device *vdev)
{
module_put(THIS_MODULE);
}
@@ -626,8 +626,7 @@ static ssize_t
resolution_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct mdev_device *mdev = mdev_from_dev(dev);
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
+ struct mdev_state *mdev_state = dev_get_drvdata(dev);
return sprintf(buf, "%dx%d\n",
mdev_state->type->width,
@@ -716,18 +715,30 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mdpy_dev_ops = {
+ .open = mdpy_open,
+ .release = mdpy_close,
+ .read = mdpy_read,
+ .write = mdpy_write,
+ .ioctl = mdpy_ioctl,
+ .mmap = mdpy_mmap,
+};
+
+static struct mdev_driver mdpy_driver = {
+ .driver = {
+ .name = "mdpy",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mdpy_probe,
+ .remove = mdpy_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
- .mdev_attr_groups = mdev_dev_groups,
+ .device_driver = &mdpy_driver,
.supported_type_groups = mdev_type_groups,
- .create = mdpy_create,
- .remove = mdpy_remove,
- .open = mdpy_open,
- .release = mdpy_close,
- .read = mdpy_read,
- .write = mdpy_write,
- .ioctl = mdpy_ioctl,
- .mmap = mdpy_mmap,
};
static const struct file_operations vd_fops = {
@@ -752,11 +763,15 @@ static int __init mdpy_dev_init(void)
cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK + 1);
pr_info("%s: major %d\n", __func__, MAJOR(mdpy_devt));
+ ret = mdev_register_driver(&mdpy_driver);
+ if (ret)
+ goto err_cdev;
+
mdpy_class = class_create(THIS_MODULE, MDPY_CLASS_NAME);
if (IS_ERR(mdpy_class)) {
pr_err("Error: failed to register mdpy_dev class\n");
ret = PTR_ERR(mdpy_class);
- goto failed1;
+ goto err_driver;
}
mdpy_dev.class = mdpy_class;
mdpy_dev.release = mdpy_device_release;
@@ -764,19 +779,21 @@ static int __init mdpy_dev_init(void)
ret = device_register(&mdpy_dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mdpy_dev, &mdev_fops);
if (ret)
- goto failed3;
+ goto err_device;
return 0;
-failed3:
+err_device:
device_unregister(&mdpy_dev);
-failed2:
+err_class:
class_destroy(mdpy_class);
-failed1:
+err_driver:
+ mdev_unregister_driver(&mdpy_driver);
+err_cdev:
cdev_del(&mdpy_cdev);
unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
return ret;
@@ -788,6 +805,7 @@ static void __exit mdpy_dev_exit(void)
mdev_unregister_device(&mdpy_dev);
device_unregister(&mdpy_dev);
+ mdev_unregister_driver(&mdpy_driver);
cdev_del(&mdpy_cdev);
unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
class_destroy(mdpy_class);
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index b9b24be4abda..8b26fecc4afe 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -127,6 +127,7 @@ struct serial_port {
/* State of each mdev device */
struct mdev_state {
+ struct vfio_device vdev;
int irq_fd;
struct eventfd_ctx *intx_evtfd;
struct eventfd_ctx *msi_evtfd;
@@ -143,13 +144,14 @@ struct mdev_state {
int nr_ports;
};
-static struct mutex mdev_list_lock;
-static struct list_head mdev_devices_list;
+static atomic_t mdev_avail_ports = ATOMIC_INIT(MAX_MTTYS);
static const struct file_operations vd_fops = {
.owner = THIS_MODULE,
};
+static const struct vfio_device_ops mtty_dev_ops;
+
/* function prototypes */
static int mtty_trigger_interrupt(struct mdev_state *mdev_state);
@@ -631,23 +633,16 @@ static void mdev_read_base(struct mdev_state *mdev_state)
}
}
-static ssize_t mdev_access(struct mdev_device *mdev, u8 *buf, size_t count,
+static ssize_t mdev_access(struct mdev_state *mdev_state, u8 *buf, size_t count,
loff_t pos, bool is_write)
{
- struct mdev_state *mdev_state;
unsigned int index;
loff_t offset;
int ret = 0;
- if (!mdev || !buf)
+ if (!buf)
return -EINVAL;
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state) {
- pr_err("%s mdev_state not found\n", __func__);
- return -EINVAL;
- }
-
mutex_lock(&mdev_state->ops_lock);
index = MTTY_VFIO_PCI_OFFSET_TO_INDEX(pos);
@@ -708,14 +703,26 @@ accessfailed:
return ret;
}
-static int mtty_create(struct mdev_device *mdev)
+static int mtty_probe(struct mdev_device *mdev)
{
struct mdev_state *mdev_state;
int nr_ports = mdev_get_type_group_id(mdev) + 1;
+ int avail_ports = atomic_read(&mdev_avail_ports);
+ int ret;
+
+ do {
+ if (avail_ports < nr_ports)
+ return -ENOSPC;
+ } while (!atomic_try_cmpxchg(&mdev_avail_ports,
+ &avail_ports, avail_ports - nr_ports));
mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
- if (mdev_state == NULL)
+ if (mdev_state == NULL) {
+ atomic_add(nr_ports, &mdev_avail_ports);
return -ENOMEM;
+ }
+
+ vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops);
mdev_state->nr_ports = nr_ports;
mdev_state->irq_index = -1;
@@ -726,63 +733,50 @@ static int mtty_create(struct mdev_device *mdev)
if (mdev_state->vconfig == NULL) {
kfree(mdev_state);
+ atomic_add(nr_ports, &mdev_avail_ports);
return -ENOMEM;
}
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_set_drvdata(mdev, mdev_state);
mtty_create_config_space(mdev_state);
- mutex_lock(&mdev_list_lock);
- list_add(&mdev_state->next, &mdev_devices_list);
- mutex_unlock(&mdev_list_lock);
+ ret = vfio_register_group_dev(&mdev_state->vdev);
+ if (ret) {
+ kfree(mdev_state);
+ atomic_add(nr_ports, &mdev_avail_ports);
+ return ret;
+ }
+ dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
}
-static int mtty_remove(struct mdev_device *mdev)
+static void mtty_remove(struct mdev_device *mdev)
{
- struct mdev_state *mds, *tmp_mds;
- struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
- int ret = -EINVAL;
-
- mutex_lock(&mdev_list_lock);
- list_for_each_entry_safe(mds, tmp_mds, &mdev_devices_list, next) {
- if (mdev_state == mds) {
- list_del(&mdev_state->next);
- mdev_set_drvdata(mdev, NULL);
- kfree(mdev_state->vconfig);
- kfree(mdev_state);
- ret = 0;
- break;
- }
- }
- mutex_unlock(&mdev_list_lock);
+ struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
+ int nr_ports = mdev_state->nr_ports;
- return ret;
+ vfio_unregister_group_dev(&mdev_state->vdev);
+
+ kfree(mdev_state->vconfig);
+ kfree(mdev_state);
+ atomic_add(nr_ports, &mdev_avail_ports);
}
-static int mtty_reset(struct mdev_device *mdev)
+static int mtty_reset(struct mdev_state *mdev_state)
{
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
pr_info("%s: called\n", __func__);
return 0;
}
-static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
+static ssize_t mtty_read(struct vfio_device *vdev, char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -792,7 +786,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
if (count >= 4 && !(*ppos % 4)) {
u32 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -804,7 +798,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
} else if (count >= 2 && !(*ppos % 2)) {
u16 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -816,7 +810,7 @@ static ssize_t mtty_read(struct mdev_device *mdev, char __user *buf,
} else {
u8 val;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, false);
if (ret <= 0)
goto read_err;
@@ -839,9 +833,11 @@ read_err:
return -EFAULT;
}
-static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
+static ssize_t mtty_write(struct vfio_device *vdev, const char __user *buf,
size_t count, loff_t *ppos)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
unsigned int done = 0;
int ret;
@@ -854,7 +850,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -866,7 +862,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -878,7 +874,7 @@ static ssize_t mtty_write(struct mdev_device *mdev, const char __user *buf,
if (copy_from_user(&val, buf, sizeof(val)))
goto write_err;
- ret = mdev_access(mdev, (u8 *)&val, sizeof(val),
+ ret = mdev_access(mdev_state, (u8 *)&val, sizeof(val),
*ppos, true);
if (ret <= 0)
goto write_err;
@@ -896,19 +892,11 @@ write_err:
return -EFAULT;
}
-static int mtty_set_irqs(struct mdev_device *mdev, uint32_t flags,
+static int mtty_set_irqs(struct mdev_state *mdev_state, uint32_t flags,
unsigned int index, unsigned int start,
unsigned int count, void *data)
{
int ret = 0;
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
mutex_lock(&mdev_state->ops_lock);
switch (index) {
@@ -1024,21 +1012,13 @@ static int mtty_trigger_interrupt(struct mdev_state *mdev_state)
return ret;
}
-static int mtty_get_region_info(struct mdev_device *mdev,
+static int mtty_get_region_info(struct mdev_state *mdev_state,
struct vfio_region_info *region_info,
u16 *cap_type_id, void **cap_type)
{
unsigned int size = 0;
- struct mdev_state *mdev_state;
u32 bar_index;
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -EINVAL;
-
bar_index = region_info->index;
if (bar_index >= VFIO_PCI_NUM_REGIONS)
return -EINVAL;
@@ -1073,8 +1053,7 @@ static int mtty_get_region_info(struct mdev_device *mdev,
return 0;
}
-static int mtty_get_irq_info(struct mdev_device *mdev,
- struct vfio_irq_info *irq_info)
+static int mtty_get_irq_info(struct vfio_irq_info *irq_info)
{
switch (irq_info->index) {
case VFIO_PCI_INTX_IRQ_INDEX:
@@ -1098,8 +1077,7 @@ static int mtty_get_irq_info(struct mdev_device *mdev,
return 0;
}
-static int mtty_get_device_info(struct mdev_device *mdev,
- struct vfio_device_info *dev_info)
+static int mtty_get_device_info(struct vfio_device_info *dev_info)
{
dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
@@ -1108,19 +1086,13 @@ static int mtty_get_device_info(struct mdev_device *mdev,
return 0;
}
-static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
+static long mtty_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
int ret = 0;
unsigned long minsz;
- struct mdev_state *mdev_state;
-
- if (!mdev)
- return -EINVAL;
-
- mdev_state = mdev_get_drvdata(mdev);
- if (!mdev_state)
- return -ENODEV;
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
@@ -1135,7 +1107,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mtty_get_device_info(mdev, &info);
+ ret = mtty_get_device_info(&info);
if (ret)
return ret;
@@ -1160,7 +1132,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
if (info.argsz < minsz)
return -EINVAL;
- ret = mtty_get_region_info(mdev, &info, &cap_type_id,
+ ret = mtty_get_region_info(mdev_state, &info, &cap_type_id,
&cap_type);
if (ret)
return ret;
@@ -1184,7 +1156,7 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
(info.index >= mdev_state->dev_info.num_irqs))
return -EINVAL;
- ret = mtty_get_irq_info(mdev, &info);
+ ret = mtty_get_irq_info(&info);
if (ret)
return ret;
@@ -1218,25 +1190,25 @@ static long mtty_ioctl(struct mdev_device *mdev, unsigned int cmd,
return PTR_ERR(data);
}
- ret = mtty_set_irqs(mdev, hdr.flags, hdr.index, hdr.start,
+ ret = mtty_set_irqs(mdev_state, hdr.flags, hdr.index, hdr.start,
hdr.count, data);
kfree(ptr);
return ret;
}
case VFIO_DEVICE_RESET:
- return mtty_reset(mdev);
+ return mtty_reset(mdev_state);
}
return -ENOTTY;
}
-static int mtty_open(struct mdev_device *mdev)
+static int mtty_open(struct vfio_device *vdev)
{
pr_info("%s\n", __func__);
return 0;
}
-static void mtty_close(struct mdev_device *mdev)
+static void mtty_close(struct vfio_device *mdev)
{
pr_info("%s\n", __func__);
}
@@ -1308,14 +1280,9 @@ static ssize_t available_instances_show(struct mdev_type *mtype,
struct mdev_type_attribute *attr,
char *buf)
{
- struct mdev_state *mds;
unsigned int ports = mtype_get_type_group_id(mtype) + 1;
- int used = 0;
-
- list_for_each_entry(mds, &mdev_devices_list, next)
- used += mds->nr_ports;
- return sprintf(buf, "%d\n", (MAX_MTTYS - used)/ports);
+ return sprintf(buf, "%d\n", atomic_read(&mdev_avail_ports) / ports);
}
static MDEV_TYPE_ATTR_RO(available_instances);
@@ -1351,18 +1318,31 @@ static struct attribute_group *mdev_type_groups[] = {
NULL,
};
+static const struct vfio_device_ops mtty_dev_ops = {
+ .name = "vfio-mtty",
+ .open = mtty_open,
+ .release = mtty_close,
+ .read = mtty_read,
+ .write = mtty_write,
+ .ioctl = mtty_ioctl,
+};
+
+static struct mdev_driver mtty_driver = {
+ .driver = {
+ .name = "mtty",
+ .owner = THIS_MODULE,
+ .mod_name = KBUILD_MODNAME,
+ .dev_groups = mdev_dev_groups,
+ },
+ .probe = mtty_probe,
+ .remove = mtty_remove,
+};
+
static const struct mdev_parent_ops mdev_fops = {
.owner = THIS_MODULE,
+ .device_driver = &mtty_driver,
.dev_attr_groups = mtty_dev_groups,
- .mdev_attr_groups = mdev_dev_groups,
.supported_type_groups = mdev_type_groups,
- .create = mtty_create,
- .remove = mtty_remove,
- .open = mtty_open,
- .release = mtty_close,
- .read = mtty_read,
- .write = mtty_write,
- .ioctl = mtty_ioctl,
};
static void mtty_device_release(struct device *dev)
@@ -1393,12 +1373,16 @@ static int __init mtty_dev_init(void)
pr_info("major_number:%d\n", MAJOR(mtty_dev.vd_devt));
+ ret = mdev_register_driver(&mtty_driver);
+ if (ret)
+ goto err_cdev;
+
mtty_dev.vd_class = class_create(THIS_MODULE, MTTY_CLASS_NAME);
if (IS_ERR(mtty_dev.vd_class)) {
pr_err("Error: failed to register mtty_dev class\n");
ret = PTR_ERR(mtty_dev.vd_class);
- goto failed1;
+ goto err_driver;
}
mtty_dev.dev.class = mtty_dev.vd_class;
@@ -1407,28 +1391,22 @@ static int __init mtty_dev_init(void)
ret = device_register(&mtty_dev.dev);
if (ret)
- goto failed2;
+ goto err_class;
ret = mdev_register_device(&mtty_dev.dev, &mdev_fops);
if (ret)
- goto failed3;
-
- mutex_init(&mdev_list_lock);
- INIT_LIST_HEAD(&mdev_devices_list);
-
- goto all_done;
-
-failed3:
+ goto err_device;
+ return 0;
+err_device:
device_unregister(&mtty_dev.dev);
-failed2:
+err_class:
class_destroy(mtty_dev.vd_class);
-
-failed1:
+err_driver:
+ mdev_unregister_driver(&mtty_driver);
+err_cdev:
cdev_del(&mtty_dev.vd_cdev);
unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
-
-all_done:
return ret;
}
@@ -1439,6 +1417,7 @@ static void __exit mtty_dev_exit(void)
device_unregister(&mtty_dev.dev);
idr_destroy(&mtty_dev.vd_idr);
+ mdev_unregister_driver(&mtty_driver);
cdev_del(&mtty_dev.vd_cdev);
unregister_chrdev_region(mtty_dev.vd_devt, MINORMASK + 1);
class_destroy(mtty_dev.vd_class);