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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-11 14:48:42 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-11 14:48:42 -0700 |
commit | 78e709522d2c012cb0daad2e668506637bffb7c2 (patch) | |
tree | 899d892238891f4f2ca1dee3657cb69694c0ca34 /drivers/virtio | |
parent | b79bd0d5102b4a3ea908018fda6b84a4c8fd6235 (diff) | |
parent | 7bc7f61897b66bef78bb5952e3d1e9f3aaf9ccca (diff) | |
download | linux-stable-78e709522d2c012cb0daad2e668506637bffb7c2.tar.gz linux-stable-78e709522d2c012cb0daad2e668506637bffb7c2.tar.bz2 linux-stable-78e709522d2c012cb0daad2e668506637bffb7c2.zip |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
- vduse driver ("vDPA Device in Userspace") supporting emulated virtio
block devices
- virtio-vsock support for end of record with SEQPACKET
- vdpa: mac and mq support for ifcvf and mlx5
- vdpa: management netlink for ifcvf
- virtio-i2c, gpio dt bindings
- misc fixes and cleanups
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (39 commits)
Documentation: Add documentation for VDUSE
vduse: Introduce VDUSE - vDPA Device in Userspace
vduse: Implement an MMU-based software IOTLB
vdpa: Support transferring virtual addressing during DMA mapping
vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap()
vdpa: Add an opaque pointer for vdpa_config_ops.dma_map()
vhost-iotlb: Add an opaque pointer for vhost IOTLB
vhost-vdpa: Handle the failure of vdpa_reset()
vdpa: Add reset callback in vdpa_config_ops
vdpa: Fix some coding style issues
file: Export receive_fd() to modules
eventfd: Export eventfd_wake_count to modules
iova: Export alloc_iova_fast() and free_iova_fast()
virtio-blk: remove unneeded "likely" statements
virtio-balloon: Use virtio_find_vqs() helper
vdpa: Make use of PFN_PHYS/PFN_UP/PFN_DOWN helper macro
vsock_test: update message bounds test for MSG_EOR
af_vsock: rename variables in receive loop
virtio/vsock: support MSG_EOR bit processing
vhost/vsock: support MSG_EOR bit processing
...
Diffstat (limited to 'drivers/virtio')
-rw-r--r-- | drivers/virtio/virtio.c | 56 | ||||
-rw-r--r-- | drivers/virtio/virtio_balloon.c | 4 |
2 files changed, 55 insertions, 5 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 1ea0c1f6a1fd..588e02fb91d3 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -4,6 +4,7 @@ #include <linux/virtio_config.h> #include <linux/module.h> #include <linux/idr.h> +#include <linux/of.h> #include <uapi/linux/virtio_ids.h> /* Unique numbering for virtio devices. */ @@ -292,6 +293,8 @@ static void virtio_dev_remove(struct device *_d) /* Acknowledge the device's existence again. */ virtio_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE); + + of_node_put(dev->dev.of_node); } static struct bus_type virtio_bus = { @@ -318,6 +321,43 @@ void unregister_virtio_driver(struct virtio_driver *driver) } EXPORT_SYMBOL_GPL(unregister_virtio_driver); +static int virtio_device_of_init(struct virtio_device *dev) +{ + struct device_node *np, *pnode = dev_of_node(dev->dev.parent); + char compat[] = "virtio,deviceXXXXXXXX"; + int ret, count; + + if (!pnode) + return 0; + + count = of_get_available_child_count(pnode); + if (!count) + return 0; + + /* There can be only 1 child node */ + if (WARN_ON(count > 1)) + return -EINVAL; + + np = of_get_next_available_child(pnode, NULL); + if (WARN_ON(!np)) + return -ENODEV; + + ret = snprintf(compat, sizeof(compat), "virtio,device%x", dev->id.device); + BUG_ON(ret >= sizeof(compat)); + + if (!of_device_is_compatible(np, compat)) { + ret = -EINVAL; + goto out; + } + + dev->dev.of_node = np; + return 0; + +out: + of_node_put(np); + return ret; +} + /** * register_virtio_device - register virtio device * @dev : virtio device to be registered @@ -342,6 +382,10 @@ int register_virtio_device(struct virtio_device *dev) dev->index = err; dev_set_name(&dev->dev, "virtio%u", dev->index); + err = virtio_device_of_init(dev); + if (err) + goto out_ida_remove; + spin_lock_init(&dev->config_lock); dev->config_enabled = false; dev->config_change_pending = false; @@ -362,10 +406,16 @@ int register_virtio_device(struct virtio_device *dev) */ err = device_add(&dev->dev); if (err) - ida_simple_remove(&virtio_index_ida, dev->index); + goto out_of_node_put; + + return 0; + +out_of_node_put: + of_node_put(dev->dev.of_node); +out_ida_remove: + ida_simple_remove(&virtio_index_ida, dev->index); out: - if (err) - virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); + virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); return err; } EXPORT_SYMBOL_GPL(register_virtio_device); diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 47dce91f788c..c22ff0117b46 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -531,8 +531,8 @@ static int init_vqs(struct virtio_balloon *vb) callbacks[VIRTIO_BALLOON_VQ_REPORTING] = balloon_ack; } - err = vb->vdev->config->find_vqs(vb->vdev, VIRTIO_BALLOON_VQ_MAX, - vqs, callbacks, names, NULL, NULL); + err = virtio_find_vqs(vb->vdev, VIRTIO_BALLOON_VQ_MAX, vqs, + callbacks, names, NULL); if (err) return err; |