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-rw-r--r--samples/vfio-mdev/mbochs.c172
-rw-r--r--samples/vfio-mdev/mdpy.c185
-rw-r--r--samples/vfio-mdev/mtty.c157
3 files changed, 217 insertions, 297 deletions
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 344c2901a82b..117a8d799f71 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -21,7 +21,6 @@
*/
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
@@ -100,35 +99,44 @@ MODULE_PARM_DESC(mem, "megabytes available to " MBOCHS_NAME " devices");
#define MBOCHS_TYPE_2 "medium"
#define MBOCHS_TYPE_3 "large"
-static const struct mbochs_type {
- const char *name;
+static struct mbochs_type {
+ struct mdev_type type;
u32 mbytes;
u32 max_x;
u32 max_y;
} mbochs_types[] = {
{
- .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1,
+ .type.sysfs_name = MBOCHS_TYPE_1,
+ .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1,
.mbytes = 4,
.max_x = 800,
.max_y = 600,
}, {
- .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2,
+ .type.sysfs_name = MBOCHS_TYPE_2,
+ .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2,
.mbytes = 16,
.max_x = 1920,
.max_y = 1440,
}, {
- .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3,
+ .type.sysfs_name = MBOCHS_TYPE_3,
+ .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3,
.mbytes = 64,
.max_x = 0,
.max_y = 0,
},
};
+static struct mdev_type *mbochs_mdev_types[] = {
+ &mbochs_types[0].type,
+ &mbochs_types[1].type,
+ &mbochs_types[2].type,
+};
static dev_t mbochs_devt;
static struct class *mbochs_class;
static struct cdev mbochs_cdev;
static struct device mbochs_dev;
+static struct mdev_parent mbochs_parent;
static atomic_t mbochs_avail_mbytes;
static const struct vfio_device_ops mbochs_dev_ops;
@@ -505,13 +513,14 @@ static int mbochs_reset(struct mdev_state *mdev_state)
return 0;
}
-static int mbochs_probe(struct mdev_device *mdev)
+static int mbochs_init_dev(struct vfio_device *vdev)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+ struct mdev_device *mdev = to_mdev_device(vdev->dev);
+ struct mbochs_type *type =
+ container_of(mdev->type, struct mbochs_type, type);
int avail_mbytes = atomic_read(&mbochs_avail_mbytes);
- 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;
do {
@@ -520,14 +529,9 @@ static int mbochs_probe(struct mdev_device *mdev)
} while (!atomic_try_cmpxchg(&mbochs_avail_mbytes, &avail_mbytes,
avail_mbytes - type->mbytes));
- mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
- if (mdev_state == NULL)
- goto err_avail;
- 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)
- goto err_mem;
+ if (!mdev_state->vconfig)
+ goto err_avail;
mdev_state->memsize = type->mbytes * 1024 * 1024;
mdev_state->pagecount = mdev_state->memsize >> PAGE_SHIFT;
@@ -535,10 +539,7 @@ static int mbochs_probe(struct mdev_device *mdev)
sizeof(struct page *),
GFP_KERNEL);
if (!mdev_state->pages)
- goto err_mem;
-
- dev_info(dev, "%s: %s, %d MB, %ld pages\n", __func__,
- type->name, type->mbytes, mdev_state->pagecount);
+ goto err_vconfig;
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
@@ -553,19 +554,47 @@ static int mbochs_probe(struct mdev_device *mdev)
mbochs_create_config_space(mdev_state);
mbochs_reset(mdev_state);
+ dev_info(vdev->dev, "%s: %s, %d MB, %ld pages\n", __func__,
+ type->type.pretty_name, type->mbytes, mdev_state->pagecount);
+ return 0;
+
+err_vconfig:
+ kfree(mdev_state->vconfig);
+err_avail:
+ atomic_add(type->mbytes, &mbochs_avail_mbytes);
+ return ret;
+}
+
+static int mbochs_probe(struct mdev_device *mdev)
+{
+ struct mdev_state *mdev_state;
+ int ret = -ENOMEM;
+
+ mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
+ &mbochs_dev_ops);
+ if (IS_ERR(mdev_state))
+ return PTR_ERR(mdev_state);
+
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
- goto err_mem;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
-err_mem:
- vfio_uninit_group_dev(&mdev_state->vdev);
+
+err_put_vdev:
+ vfio_put_device(&mdev_state->vdev);
+ return ret;
+}
+
+static void mbochs_release_dev(struct vfio_device *vdev)
+{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+
+ atomic_add(mdev_state->type->mbytes, &mbochs_avail_mbytes);
kfree(mdev_state->pages);
kfree(mdev_state->vconfig);
- kfree(mdev_state);
-err_avail:
- atomic_add(type->mbytes, &mbochs_avail_mbytes);
- return ret;
+ vfio_free_device(vdev);
}
static void mbochs_remove(struct mdev_device *mdev)
@@ -573,11 +602,7 @@ static void mbochs_remove(struct mdev_device *mdev)
struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
vfio_unregister_group_dev(&mdev_state->vdev);
- vfio_uninit_group_dev(&mdev_state->vdev);
- atomic_add(mdev_state->type->mbytes, &mbochs_avail_mbytes);
- kfree(mdev_state->pages);
- kfree(mdev_state->vconfig);
- kfree(mdev_state);
+ vfio_put_device(&mdev_state->vdev);
}
static ssize_t mbochs_read(struct vfio_device *vdev, char __user *buf,
@@ -1325,78 +1350,27 @@ static const struct attribute_group *mdev_dev_groups[] = {
NULL,
};
-static ssize_t name_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
+static ssize_t mbochs_show_description(struct mdev_type *mtype, char *buf)
{
- const struct mbochs_type *type =
- &mbochs_types[mtype_get_type_group_id(mtype)];
-
- return sprintf(buf, "%s\n", type->name);
-}
-static MDEV_TYPE_ATTR_RO(name);
-
-static ssize_t description_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- const struct mbochs_type *type =
- &mbochs_types[mtype_get_type_group_id(mtype)];
+ struct mbochs_type *type =
+ container_of(mtype, struct mbochs_type, type);
return sprintf(buf, "virtual display, %d MB video memory\n",
type ? type->mbytes : 0);
}
-static MDEV_TYPE_ATTR_RO(description);
-static ssize_t available_instances_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr,
- char *buf)
+static unsigned int mbochs_get_available(struct mdev_type *mtype)
{
- const struct mbochs_type *type =
- &mbochs_types[mtype_get_type_group_id(mtype)];
- int count = atomic_read(&mbochs_avail_mbytes) / type->mbytes;
-
- return sprintf(buf, "%d\n", count);
-}
-static MDEV_TYPE_ATTR_RO(available_instances);
+ struct mbochs_type *type =
+ container_of(mtype, struct mbochs_type, type);
-static ssize_t device_api_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
+ return atomic_read(&mbochs_avail_mbytes) / type->mbytes;
}
-static MDEV_TYPE_ATTR_RO(device_api);
-
-static struct attribute *mdev_types_attrs[] = {
- &mdev_type_attr_name.attr,
- &mdev_type_attr_description.attr,
- &mdev_type_attr_device_api.attr,
- &mdev_type_attr_available_instances.attr,
- NULL,
-};
-
-static struct attribute_group mdev_type_group1 = {
- .name = MBOCHS_TYPE_1,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group mdev_type_group2 = {
- .name = MBOCHS_TYPE_2,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group mdev_type_group3 = {
- .name = MBOCHS_TYPE_3,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group *mdev_type_groups[] = {
- &mdev_type_group1,
- &mdev_type_group2,
- &mdev_type_group3,
- NULL,
-};
static const struct vfio_device_ops mbochs_dev_ops = {
.close_device = mbochs_close_device,
+ .init = mbochs_init_dev,
+ .release = mbochs_release_dev,
.read = mbochs_read,
.write = mbochs_write,
.ioctl = mbochs_ioctl,
@@ -1404,6 +1378,7 @@ static const struct vfio_device_ops mbochs_dev_ops = {
};
static struct mdev_driver mbochs_driver = {
+ .device_api = VFIO_DEVICE_API_PCI_STRING,
.driver = {
.name = "mbochs",
.owner = THIS_MODULE,
@@ -1412,7 +1387,8 @@ static struct mdev_driver mbochs_driver = {
},
.probe = mbochs_probe,
.remove = mbochs_remove,
- .supported_type_groups = mdev_type_groups,
+ .get_available = mbochs_get_available,
+ .show_description = mbochs_show_description,
};
static const struct file_operations vd_fops = {
@@ -1457,7 +1433,9 @@ static int __init mbochs_dev_init(void)
if (ret)
goto err_class;
- ret = mdev_register_device(&mbochs_dev, &mbochs_driver);
+ ret = mdev_register_parent(&mbochs_parent, &mbochs_dev, &mbochs_driver,
+ mbochs_mdev_types,
+ ARRAY_SIZE(mbochs_mdev_types));
if (ret)
goto err_device;
@@ -1478,7 +1456,7 @@ err_cdev:
static void __exit mbochs_dev_exit(void)
{
mbochs_dev.bus = NULL;
- mdev_unregister_device(&mbochs_dev);
+ mdev_unregister_parent(&mbochs_parent);
device_unregister(&mbochs_dev);
mdev_unregister_driver(&mbochs_driver);
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index e8c46eb2e246..946e8cfde6fd 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -17,7 +17,6 @@
*/
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
@@ -43,36 +42,34 @@
MODULE_LICENSE("GPL v2");
-static int max_devices = 4;
-module_param_named(count, max_devices, int, 0444);
-MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices");
-
-
#define MDPY_TYPE_1 "vga"
#define MDPY_TYPE_2 "xga"
#define MDPY_TYPE_3 "hd"
-static const struct mdpy_type {
- const char *name;
+static struct mdpy_type {
+ struct mdev_type type;
u32 format;
u32 bytepp;
u32 width;
u32 height;
} mdpy_types[] = {
{
- .name = MDPY_CLASS_NAME "-" MDPY_TYPE_1,
+ .type.sysfs_name = MDPY_TYPE_1,
+ .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_1,
.format = DRM_FORMAT_XRGB8888,
.bytepp = 4,
.width = 640,
.height = 480,
}, {
- .name = MDPY_CLASS_NAME "-" MDPY_TYPE_2,
+ .type.sysfs_name = MDPY_TYPE_2,
+ .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_2,
.format = DRM_FORMAT_XRGB8888,
.bytepp = 4,
.width = 1024,
.height = 768,
}, {
- .name = MDPY_CLASS_NAME "-" MDPY_TYPE_3,
+ .type.sysfs_name = MDPY_TYPE_3,
+ .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_3,
.format = DRM_FORMAT_XRGB8888,
.bytepp = 4,
.width = 1920,
@@ -80,11 +77,17 @@ static const struct mdpy_type {
},
};
+static struct mdev_type *mdpy_mdev_types[] = {
+ &mdpy_types[0].type,
+ &mdpy_types[1].type,
+ &mdpy_types[2].type,
+};
+
static dev_t mdpy_devt;
static struct class *mdpy_class;
static struct cdev mdpy_cdev;
static struct device mdpy_dev;
-static u32 mdpy_count;
+static struct mdev_parent mdpy_parent;
static const struct vfio_device_ops mdpy_dev_ops;
/* State of each mdev device */
@@ -216,61 +219,71 @@ static int mdpy_reset(struct mdev_state *mdev_state)
return 0;
}
-static int mdpy_probe(struct mdev_device *mdev)
+static int mdpy_init_dev(struct vfio_device *vdev)
{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+ struct mdev_device *mdev = to_mdev_device(vdev->dev);
const struct mdpy_type *type =
- &mdpy_types[mdev_get_type_group_id(mdev)];
- struct device *dev = mdev_dev(mdev);
- struct mdev_state *mdev_state;
+ container_of(mdev->type, struct mdpy_type, type);
u32 fbsize;
- int ret;
-
- if (mdpy_count >= max_devices)
- return -ENOMEM;
-
- 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);
+ int ret = -ENOMEM;
mdev_state->vconfig = kzalloc(MDPY_CONFIG_SPACE_SIZE, GFP_KERNEL);
- if (mdev_state->vconfig == NULL) {
- ret = -ENOMEM;
- goto err_state;
- }
+ if (!mdev_state->vconfig)
+ return ret;
fbsize = roundup_pow_of_two(type->width * type->height * type->bytepp);
mdev_state->memblk = vmalloc_user(fbsize);
- if (!mdev_state->memblk) {
- ret = -ENOMEM;
- goto err_vconfig;
- }
- dev_info(dev, "%s: %s (%dx%d)\n", __func__, type->name, type->width,
- type->height);
+ if (!mdev_state->memblk)
+ goto out_vconfig;
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
- mdev_state->type = type;
+ mdev_state->type = type;
mdev_state->memsize = fbsize;
mdpy_create_config_space(mdev_state);
mdpy_reset(mdev_state);
- mdpy_count++;
+ dev_info(vdev->dev, "%s: %s (%dx%d)\n", __func__, type->type.pretty_name,
+ type->width, type->height);
+ return 0;
+
+out_vconfig:
+ kfree(mdev_state->vconfig);
+ return ret;
+}
+
+static int mdpy_probe(struct mdev_device *mdev)
+{
+ struct mdev_state *mdev_state;
+ int ret;
+
+ mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
+ &mdpy_dev_ops);
+ if (IS_ERR(mdev_state))
+ return PTR_ERR(mdev_state);
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
- goto err_mem;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
-err_mem:
+
+err_put_vdev:
+ vfio_put_device(&mdev_state->vdev);
+ return ret;
+}
+
+static void mdpy_release_dev(struct vfio_device *vdev)
+{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+
vfree(mdev_state->memblk);
-err_vconfig:
kfree(mdev_state->vconfig);
-err_state:
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
- return ret;
+ vfio_free_device(vdev);
}
static void mdpy_remove(struct mdev_device *mdev)
@@ -280,12 +293,7 @@ static void mdpy_remove(struct mdev_device *mdev)
dev_info(&mdev->dev, "%s\n", __func__);
vfio_unregister_group_dev(&mdev_state->vdev);
- vfree(mdev_state->memblk);
- kfree(mdev_state->vconfig);
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
-
- mdpy_count--;
+ vfio_put_device(&mdev_state->vdev);
}
static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf,
@@ -641,73 +649,17 @@ static const struct attribute_group *mdev_dev_groups[] = {
NULL,
};
-static ssize_t name_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- const struct mdpy_type *type =
- &mdpy_types[mtype_get_type_group_id(mtype)];
-
- return sprintf(buf, "%s\n", type->name);
-}
-static MDEV_TYPE_ATTR_RO(name);
-
-static ssize_t description_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
+static ssize_t mdpy_show_description(struct mdev_type *mtype, char *buf)
{
- const struct mdpy_type *type =
- &mdpy_types[mtype_get_type_group_id(mtype)];
+ struct mdpy_type *type = container_of(mtype, struct mdpy_type, type);
return sprintf(buf, "virtual display, %dx%d framebuffer\n",
type->width, type->height);
}
-static MDEV_TYPE_ATTR_RO(description);
-
-static ssize_t available_instances_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%d\n", max_devices - mdpy_count);
-}
-static MDEV_TYPE_ATTR_RO(available_instances);
-
-static ssize_t device_api_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
-}
-static MDEV_TYPE_ATTR_RO(device_api);
-
-static struct attribute *mdev_types_attrs[] = {
- &mdev_type_attr_name.attr,
- &mdev_type_attr_description.attr,
- &mdev_type_attr_device_api.attr,
- &mdev_type_attr_available_instances.attr,
- NULL,
-};
-
-static struct attribute_group mdev_type_group1 = {
- .name = MDPY_TYPE_1,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group mdev_type_group2 = {
- .name = MDPY_TYPE_2,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group mdev_type_group3 = {
- .name = MDPY_TYPE_3,
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group *mdev_type_groups[] = {
- &mdev_type_group1,
- &mdev_type_group2,
- &mdev_type_group3,
- NULL,
-};
static const struct vfio_device_ops mdpy_dev_ops = {
+ .init = mdpy_init_dev,
+ .release = mdpy_release_dev,
.read = mdpy_read,
.write = mdpy_write,
.ioctl = mdpy_ioctl,
@@ -715,6 +667,8 @@ static const struct vfio_device_ops mdpy_dev_ops = {
};
static struct mdev_driver mdpy_driver = {
+ .device_api = VFIO_DEVICE_API_PCI_STRING,
+ .max_instances = 4,
.driver = {
.name = "mdpy",
.owner = THIS_MODULE,
@@ -723,7 +677,7 @@ static struct mdev_driver mdpy_driver = {
},
.probe = mdpy_probe,
.remove = mdpy_remove,
- .supported_type_groups = mdev_type_groups,
+ .show_description = mdpy_show_description,
};
static const struct file_operations vd_fops = {
@@ -766,7 +720,9 @@ static int __init mdpy_dev_init(void)
if (ret)
goto err_class;
- ret = mdev_register_device(&mdpy_dev, &mdpy_driver);
+ ret = mdev_register_parent(&mdpy_parent, &mdpy_dev, &mdpy_driver,
+ mdpy_mdev_types,
+ ARRAY_SIZE(mdpy_mdev_types));
if (ret)
goto err_device;
@@ -787,7 +743,7 @@ err_cdev:
static void __exit mdpy_dev_exit(void)
{
mdpy_dev.bus = NULL;
- mdev_unregister_device(&mdpy_dev);
+ mdev_unregister_parent(&mdpy_parent);
device_unregister(&mdpy_dev);
mdev_unregister_driver(&mdpy_driver);
@@ -797,5 +753,8 @@ static void __exit mdpy_dev_exit(void)
mdpy_class = NULL;
}
+module_param_named(count, mdpy_driver.max_instances, int, 0444);
+MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices");
+
module_init(mdpy_dev_init)
module_exit(mdpy_dev_exit)
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index f42a59ed2e3f..e72085fc1376 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -12,7 +12,6 @@
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/poll.h>
@@ -20,7 +19,6 @@
#include <linux/cdev.h>
#include <linux/sched.h>
#include <linux/wait.h>
-#include <linux/uuid.h>
#include <linux/vfio.h>
#include <linux/iommu.h>
#include <linux/sysfs.h>
@@ -74,6 +72,7 @@ static struct mtty_dev {
struct cdev vd_cdev;
struct idr vd_idr;
struct device dev;
+ struct mdev_parent parent;
} mtty_dev;
struct mdev_region_info {
@@ -144,6 +143,21 @@ struct mdev_state {
int nr_ports;
};
+static struct mtty_type {
+ struct mdev_type type;
+ int nr_ports;
+} mtty_types[2] = {
+ { .nr_ports = 1, .type.sysfs_name = "1",
+ .type.pretty_name = "Single port serial" },
+ { .nr_ports = 2, .type.sysfs_name = "2",
+ .type.pretty_name = "Dual port serial" },
+};
+
+static struct mdev_type *mtty_mdev_types[] = {
+ &mtty_types[0].type,
+ &mtty_types[1].type,
+};
+
static atomic_t mdev_avail_ports = ATOMIC_INIT(MAX_MTTYS);
static const struct file_operations vd_fops = {
@@ -703,71 +717,82 @@ accessfailed:
return ret;
}
-static int mtty_probe(struct mdev_device *mdev)
+static int mtty_init_dev(struct vfio_device *vdev)
{
- struct mdev_state *mdev_state;
- int nr_ports = mdev_get_type_group_id(mdev) + 1;
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+ struct mdev_device *mdev = to_mdev_device(vdev->dev);
+ struct mtty_type *type =
+ container_of(mdev->type, struct mtty_type, type);
int avail_ports = atomic_read(&mdev_avail_ports);
int ret;
do {
- if (avail_ports < nr_ports)
+ if (avail_ports < type->nr_ports)
return -ENOSPC;
} while (!atomic_try_cmpxchg(&mdev_avail_ports,
- &avail_ports, avail_ports - nr_ports));
+ &avail_ports,
+ avail_ports - type->nr_ports));
- mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
- if (mdev_state == NULL) {
- ret = -ENOMEM;
- goto err_nr_ports;
- }
-
- vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops);
-
- mdev_state->nr_ports = nr_ports;
+ mdev_state->nr_ports = type->nr_ports;
mdev_state->irq_index = -1;
mdev_state->s[0].max_fifo_size = MAX_FIFO_SIZE;
mdev_state->s[1].max_fifo_size = MAX_FIFO_SIZE;
mutex_init(&mdev_state->rxtx_lock);
- mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL);
- if (mdev_state->vconfig == NULL) {
+ mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL);
+ if (!mdev_state->vconfig) {
ret = -ENOMEM;
- goto err_state;
+ goto err_nr_ports;
}
mutex_init(&mdev_state->ops_lock);
mdev_state->mdev = mdev;
-
mtty_create_config_space(mdev_state);
+ return 0;
+
+err_nr_ports:
+ atomic_add(type->nr_ports, &mdev_avail_ports);
+ return ret;
+}
+
+static int mtty_probe(struct mdev_device *mdev)
+{
+ struct mdev_state *mdev_state;
+ int ret;
+
+ mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev,
+ &mtty_dev_ops);
+ if (IS_ERR(mdev_state))
+ return PTR_ERR(mdev_state);
ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
if (ret)
- goto err_vconfig;
+ goto err_put_vdev;
dev_set_drvdata(&mdev->dev, mdev_state);
return 0;
-err_vconfig:
- kfree(mdev_state->vconfig);
-err_state:
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
-err_nr_ports:
- atomic_add(nr_ports, &mdev_avail_ports);
+err_put_vdev:
+ vfio_put_device(&mdev_state->vdev);
return ret;
}
+static void mtty_release_dev(struct vfio_device *vdev)
+{
+ struct mdev_state *mdev_state =
+ container_of(vdev, struct mdev_state, vdev);
+
+ atomic_add(mdev_state->nr_ports, &mdev_avail_ports);
+ kfree(mdev_state->vconfig);
+ vfio_free_device(vdev);
+}
+
static void mtty_remove(struct mdev_device *mdev)
{
struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
- int nr_ports = mdev_state->nr_ports;
vfio_unregister_group_dev(&mdev_state->vdev);
-
- kfree(mdev_state->vconfig);
- vfio_uninit_group_dev(&mdev_state->vdev);
- kfree(mdev_state);
- atomic_add(nr_ports, &mdev_avail_ports);
+ vfio_put_device(&mdev_state->vdev);
}
static int mtty_reset(struct mdev_state *mdev_state)
@@ -1231,68 +1256,24 @@ static const struct attribute_group *mdev_dev_groups[] = {
NULL,
};
-static ssize_t name_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- static const char *name_str[2] = { "Single port serial",
- "Dual port serial" };
-
- return sysfs_emit(buf, "%s\n",
- name_str[mtype_get_type_group_id(mtype)]);
-}
-
-static MDEV_TYPE_ATTR_RO(name);
-
-static ssize_t available_instances_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr,
- char *buf)
+static unsigned int mtty_get_available(struct mdev_type *mtype)
{
- unsigned int ports = mtype_get_type_group_id(mtype) + 1;
+ struct mtty_type *type = container_of(mtype, struct mtty_type, type);
- return sprintf(buf, "%d\n", atomic_read(&mdev_avail_ports) / ports);
+ return atomic_read(&mdev_avail_ports) / type->nr_ports;
}
-static MDEV_TYPE_ATTR_RO(available_instances);
-
-static ssize_t device_api_show(struct mdev_type *mtype,
- struct mdev_type_attribute *attr, char *buf)
-{
- return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
-}
-
-static MDEV_TYPE_ATTR_RO(device_api);
-
-static struct attribute *mdev_types_attrs[] = {
- &mdev_type_attr_name.attr,
- &mdev_type_attr_device_api.attr,
- &mdev_type_attr_available_instances.attr,
- NULL,
-};
-
-static struct attribute_group mdev_type_group1 = {
- .name = "1",
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group mdev_type_group2 = {
- .name = "2",
- .attrs = mdev_types_attrs,
-};
-
-static struct attribute_group *mdev_type_groups[] = {
- &mdev_type_group1,
- &mdev_type_group2,
- NULL,
-};
-
static const struct vfio_device_ops mtty_dev_ops = {
.name = "vfio-mtty",
+ .init = mtty_init_dev,
+ .release = mtty_release_dev,
.read = mtty_read,
.write = mtty_write,
.ioctl = mtty_ioctl,
};
static struct mdev_driver mtty_driver = {
+ .device_api = VFIO_DEVICE_API_PCI_STRING,
.driver = {
.name = "mtty",
.owner = THIS_MODULE,
@@ -1301,7 +1282,7 @@ static struct mdev_driver mtty_driver = {
},
.probe = mtty_probe,
.remove = mtty_remove,
- .supported_type_groups = mdev_type_groups,
+ .get_available = mtty_get_available,
};
static void mtty_device_release(struct device *dev)
@@ -1352,7 +1333,9 @@ static int __init mtty_dev_init(void)
if (ret)
goto err_class;
- ret = mdev_register_device(&mtty_dev.dev, &mtty_driver);
+ ret = mdev_register_parent(&mtty_dev.parent, &mtty_dev.dev,
+ &mtty_driver, mtty_mdev_types,
+ ARRAY_SIZE(mtty_mdev_types));
if (ret)
goto err_device;
return 0;
@@ -1372,7 +1355,7 @@ err_cdev:
static void __exit mtty_dev_exit(void)
{
mtty_dev.dev.bus = NULL;
- mdev_unregister_device(&mtty_dev.dev);
+ mdev_unregister_parent(&mtty_dev.parent);
device_unregister(&mtty_dev.dev);
idr_destroy(&mtty_dev.vd_idr);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 02:33:18 +0000