forked from mirrors/linux
vfio/mdpy: Convert to use vfio_register_group_dev()
This is straightforward conversion, the mdev_state is actually serving as the vfio_device and we can replace all the mdev_get_drvdata()'s and the wonky dead code with a simple container_of(). Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20210617142218.1877096-10-hch@lst.de Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe
Alex Williamson
parent
09177ac919
commit
437e41368c
1 changed files with 88 additions and 71 deletions
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@ -85,9 +85,11 @@ static struct class *mdpy_class;
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static struct cdev mdpy_cdev;
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static struct device mdpy_dev;
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static u32 mdpy_count;
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static const struct vfio_device_ops mdpy_dev_ops;
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/* State of each mdev device */
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struct mdev_state {
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struct vfio_device vdev;
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u8 *vconfig;
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u32 bar_mask;
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struct mutex ops_lock;
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@ -162,11 +164,9 @@ static void handle_pci_cfg_write(struct mdev_state *mdev_state, u16 offset,
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}
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}
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static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
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loff_t pos, bool is_write)
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static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf,
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size_t count, loff_t pos, bool is_write)
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{
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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struct device *dev = mdev_dev(mdev);
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int ret = 0;
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mutex_lock(&mdev_state->ops_lock);
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@ -187,8 +187,9 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
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memcpy(buf, mdev_state->memblk, count);
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} else {
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dev_info(dev, "%s: %s @0x%llx (unhandled)\n",
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__func__, is_write ? "WR" : "RD", pos);
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dev_info(mdev_state->vdev.dev,
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"%s: %s @0x%llx (unhandled)\n", __func__,
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is_write ? "WR" : "RD", pos);
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ret = -1;
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goto accessfailed;
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}
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@ -202,9 +203,8 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
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return ret;
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}
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static int mdpy_reset(struct mdev_device *mdev)
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static int mdpy_reset(struct mdev_state *mdev_state)
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{
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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u32 stride, i;
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/* initialize with gray gradient */
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@ -216,13 +216,14 @@ static int mdpy_reset(struct mdev_device *mdev)
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return 0;
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}
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static int mdpy_create(struct mdev_device *mdev)
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static int mdpy_probe(struct mdev_device *mdev)
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{
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const struct mdpy_type *type =
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&mdpy_types[mdev_get_type_group_id(mdev)];
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struct device *dev = mdev_dev(mdev);
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struct mdev_state *mdev_state;
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u32 fbsize;
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int ret;
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if (mdpy_count >= max_devices)
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return -ENOMEM;
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@ -230,6 +231,7 @@ static int mdpy_create(struct mdev_device *mdev)
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mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL);
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if (mdev_state == NULL)
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return -ENOMEM;
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vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mdpy_dev_ops);
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mdev_state->vconfig = kzalloc(MDPY_CONFIG_SPACE_SIZE, GFP_KERNEL);
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if (mdev_state->vconfig == NULL) {
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@ -250,36 +252,41 @@ static int mdpy_create(struct mdev_device *mdev)
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mutex_init(&mdev_state->ops_lock);
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mdev_state->mdev = mdev;
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mdev_set_drvdata(mdev, mdev_state);
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mdev_state->type = type;
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mdev_state->memsize = fbsize;
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mdpy_create_config_space(mdev_state);
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mdpy_reset(mdev);
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mdpy_reset(mdev_state);
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mdpy_count++;
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ret = vfio_register_group_dev(&mdev_state->vdev);
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if (ret) {
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kfree(mdev_state);
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return ret;
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}
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dev_set_drvdata(&mdev->dev, mdev_state);
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return 0;
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}
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static int mdpy_remove(struct mdev_device *mdev)
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static void mdpy_remove(struct mdev_device *mdev)
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{
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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struct device *dev = mdev_dev(mdev);
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struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev);
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dev_info(dev, "%s\n", __func__);
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dev_info(&mdev->dev, "%s\n", __func__);
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mdev_set_drvdata(mdev, NULL);
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vfio_unregister_group_dev(&mdev_state->vdev);
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vfree(mdev_state->memblk);
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kfree(mdev_state->vconfig);
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kfree(mdev_state);
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mdpy_count--;
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return 0;
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}
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static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
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static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct mdev_state *mdev_state =
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container_of(vdev, struct mdev_state, vdev);
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unsigned int done = 0;
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int ret;
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@ -289,8 +296,8 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
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if (count >= 4 && !(*ppos % 4)) {
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u32 val;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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*ppos, false);
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, false);
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if (ret <= 0)
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goto read_err;
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@ -301,7 +308,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
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} else if (count >= 2 && !(*ppos % 2)) {
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u16 val;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, false);
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if (ret <= 0)
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goto read_err;
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@ -313,7 +320,7 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
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} else {
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u8 val;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, false);
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if (ret <= 0)
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goto read_err;
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@ -336,9 +343,11 @@ static ssize_t mdpy_read(struct mdev_device *mdev, char __user *buf,
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return -EFAULT;
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}
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static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
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static ssize_t mdpy_write(struct vfio_device *vdev, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct mdev_state *mdev_state =
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container_of(vdev, struct mdev_state, vdev);
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unsigned int done = 0;
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int ret;
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@ -351,7 +360,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
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if (copy_from_user(&val, buf, sizeof(val)))
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goto write_err;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, true);
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if (ret <= 0)
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goto write_err;
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@ -363,7 +372,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
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if (copy_from_user(&val, buf, sizeof(val)))
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goto write_err;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, true);
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if (ret <= 0)
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goto write_err;
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@ -375,7 +384,7 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
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if (copy_from_user(&val, buf, sizeof(val)))
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goto write_err;
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ret = mdev_access(mdev, (char *)&val, sizeof(val),
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ret = mdev_access(mdev_state, (char *)&val, sizeof(val),
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*ppos, true);
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if (ret <= 0)
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goto write_err;
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@ -393,9 +402,10 @@ static ssize_t mdpy_write(struct mdev_device *mdev, const char __user *buf,
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return -EFAULT;
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}
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static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
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static int mdpy_mmap(struct vfio_device *vdev, struct vm_area_struct *vma)
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{
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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struct mdev_state *mdev_state =
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container_of(vdev, struct mdev_state, vdev);
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if (vma->vm_pgoff != MDPY_MEMORY_BAR_OFFSET >> PAGE_SHIFT)
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return -EINVAL;
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@ -409,16 +419,10 @@ static int mdpy_mmap(struct mdev_device *mdev, struct vm_area_struct *vma)
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return remap_vmalloc_range(vma, mdev_state->memblk, 0);
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}
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static int mdpy_get_region_info(struct mdev_device *mdev,
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static int mdpy_get_region_info(struct mdev_state *mdev_state,
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struct vfio_region_info *region_info,
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u16 *cap_type_id, void **cap_type)
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{
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struct mdev_state *mdev_state;
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mdev_state = mdev_get_drvdata(mdev);
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if (!mdev_state)
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return -EINVAL;
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if (region_info->index >= VFIO_PCI_NUM_REGIONS &&
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region_info->index != MDPY_DISPLAY_REGION)
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return -EINVAL;
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@ -447,15 +451,13 @@ static int mdpy_get_region_info(struct mdev_device *mdev,
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return 0;
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}
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static int mdpy_get_irq_info(struct mdev_device *mdev,
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struct vfio_irq_info *irq_info)
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static int mdpy_get_irq_info(struct vfio_irq_info *irq_info)
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{
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irq_info->count = 0;
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return 0;
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}
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static int mdpy_get_device_info(struct mdev_device *mdev,
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struct vfio_device_info *dev_info)
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static int mdpy_get_device_info(struct vfio_device_info *dev_info)
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{
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dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
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dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
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@ -463,11 +465,9 @@ static int mdpy_get_device_info(struct mdev_device *mdev,
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return 0;
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}
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static int mdpy_query_gfx_plane(struct mdev_device *mdev,
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static int mdpy_query_gfx_plane(struct mdev_state *mdev_state,
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struct vfio_device_gfx_plane_info *plane)
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{
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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if (plane->flags & VFIO_GFX_PLANE_TYPE_PROBE) {
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if (plane->flags == (VFIO_GFX_PLANE_TYPE_PROBE |
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VFIO_GFX_PLANE_TYPE_REGION))
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@ -496,14 +496,13 @@ static int mdpy_query_gfx_plane(struct mdev_device *mdev,
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return 0;
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}
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static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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static long mdpy_ioctl(struct vfio_device *vdev, unsigned int cmd,
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unsigned long arg)
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{
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int ret = 0;
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unsigned long minsz;
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struct mdev_state *mdev_state;
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mdev_state = mdev_get_drvdata(mdev);
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struct mdev_state *mdev_state =
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container_of(vdev, struct mdev_state, vdev);
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switch (cmd) {
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case VFIO_DEVICE_GET_INFO:
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@ -518,7 +517,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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if (info.argsz < minsz)
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return -EINVAL;
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ret = mdpy_get_device_info(mdev, &info);
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ret = mdpy_get_device_info(&info);
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if (ret)
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return ret;
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@ -543,7 +542,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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if (info.argsz < minsz)
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return -EINVAL;
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ret = mdpy_get_region_info(mdev, &info, &cap_type_id,
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ret = mdpy_get_region_info(mdev_state, &info, &cap_type_id,
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&cap_type);
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if (ret)
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return ret;
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@ -567,7 +566,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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(info.index >= mdev_state->dev_info.num_irqs))
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return -EINVAL;
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ret = mdpy_get_irq_info(mdev, &info);
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ret = mdpy_get_irq_info(&info);
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if (ret)
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return ret;
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@ -590,7 +589,7 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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if (plane.argsz < minsz)
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return -EINVAL;
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ret = mdpy_query_gfx_plane(mdev, &plane);
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ret = mdpy_query_gfx_plane(mdev_state, &plane);
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if (ret)
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return ret;
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@ -604,12 +603,12 @@ static long mdpy_ioctl(struct mdev_device *mdev, unsigned int cmd,
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return -EINVAL;
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case VFIO_DEVICE_RESET:
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return mdpy_reset(mdev);
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return mdpy_reset(mdev_state);
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}
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return -ENOTTY;
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}
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static int mdpy_open(struct mdev_device *mdev)
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static int mdpy_open(struct vfio_device *vdev)
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{
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if (!try_module_get(THIS_MODULE))
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return -ENODEV;
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@ -617,7 +616,7 @@ static int mdpy_open(struct mdev_device *mdev)
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return 0;
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}
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static void mdpy_close(struct mdev_device *mdev)
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static void mdpy_close(struct vfio_device *vdev)
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{
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module_put(THIS_MODULE);
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}
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@ -626,8 +625,7 @@ static ssize_t
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resolution_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct mdev_device *mdev = mdev_from_dev(dev);
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struct mdev_state *mdev_state = mdev_get_drvdata(mdev);
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struct mdev_state *mdev_state = dev_get_drvdata(dev);
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return sprintf(buf, "%dx%d\n",
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mdev_state->type->width,
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@ -716,18 +714,30 @@ static struct attribute_group *mdev_type_groups[] = {
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NULL,
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};
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static const struct vfio_device_ops mdpy_dev_ops = {
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.open = mdpy_open,
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.release = mdpy_close,
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.read = mdpy_read,
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.write = mdpy_write,
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.ioctl = mdpy_ioctl,
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.mmap = mdpy_mmap,
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};
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static struct mdev_driver mdpy_driver = {
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.driver = {
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.name = "mdpy",
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.owner = THIS_MODULE,
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.mod_name = KBUILD_MODNAME,
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.dev_groups = mdev_dev_groups,
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},
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.probe = mdpy_probe,
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.remove = mdpy_remove,
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};
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static const struct mdev_parent_ops mdev_fops = {
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.owner = THIS_MODULE,
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.mdev_attr_groups = mdev_dev_groups,
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.device_driver = &mdpy_driver,
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.supported_type_groups = mdev_type_groups,
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.create = mdpy_create,
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.remove = mdpy_remove,
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.open = mdpy_open,
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.release = mdpy_close,
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.read = mdpy_read,
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.write = mdpy_write,
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.ioctl = mdpy_ioctl,
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.mmap = mdpy_mmap,
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};
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static const struct file_operations vd_fops = {
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@ -752,11 +762,15 @@ static int __init mdpy_dev_init(void)
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cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK + 1);
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pr_info("%s: major %d\n", __func__, MAJOR(mdpy_devt));
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ret = mdev_register_driver(&mdpy_driver);
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if (ret)
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goto err_cdev;
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mdpy_class = class_create(THIS_MODULE, MDPY_CLASS_NAME);
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if (IS_ERR(mdpy_class)) {
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pr_err("Error: failed to register mdpy_dev class\n");
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ret = PTR_ERR(mdpy_class);
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goto failed1;
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goto err_driver;
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}
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mdpy_dev.class = mdpy_class;
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mdpy_dev.release = mdpy_device_release;
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@ -764,19 +778,21 @@ 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 +804,7 @@ 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);
|
||||
|
|
|
|||
Loading…
Reference in a new issue