diff options
| author |   Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com> | 2022-05-10 19:43:29 +0200 |
|---|---|---|
| committer |   Jan-Simon Moeller <jsmoeller@linuxfoundation.org> | 2022-06-08 14:23:35 +0000 |
| commit | 8b11814ab8e860d333d5fc25607c23c9122a0b16 (patch) | |
| tree | b8a0bc7b3f5d55f6be10812268b25eec777d4888 /meta-egvirt | |
| parent | 25ee9ef44af5b1d305422afa2129d713be174062 (diff) | |
egvirt: linux-yocto: Add virtio_bt driver.
virtio-bt is not part of OASIS standard yet (v1.2) but Linux kernel has
driver for virtio transport for BT HCI.
Submit driver to meta-agl-devel since patch [1] is WIP and has a known
issue.
[1]: 0002-Bluetooth-virtio_bt-fix-device-removal.patch
Bug-AGL: SPEC-4363
Change-Id: Ib6851df24d430e991a4e9078345bef7e440fb6de
Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com>
Diffstat (limited to 'meta-egvirt')
3 files changed, 91 insertions, 0 deletions
diff --git a/meta-egvirt/recipes-kernel/linux/linux-yocto/0002-Bluetooth-virtio_bt-fix-device-removal.patch b/meta-egvirt/recipes-kernel/linux/linux-yocto/0002-Bluetooth-virtio_bt-fix-device-removal.patch new file mode 100644 index 00000000..8c33cab0 --- /dev/null +++ b/meta-egvirt/recipes-kernel/linux/linux-yocto/0002-Bluetooth-virtio_bt-fix-device-removal.patch @@ -0,0 +1,78 @@ +From 0eb8535f5991e658ef3a795b4124c04524ca8fc5 Mon Sep 17 00:00:00 2001 +From: "Michael S. Tsirkin" <mst@redhat.com> +Date: Thu, 25 Nov 2021 12:44:48 -0500 +Subject: [PATCH] Bluetooth: virtio_bt: fix device removal + +Device removal is clearly out of virtio spec: it attempts to remove +unused buffers from a VQ before invoking device reset. To fix, make +open/close NOPs and do all cleanup/setup in probe/remove. + +The cost here is a single skb wasted on an unused bt device - which +seems modest. + +NB: with this fix in place driver still suffers from a race condition if +an interrupt triggers while device is being reset. Work on a fix for +that issue is in progress. + +Signed-off-by: Michael S. Tsirkin <mst@redhat.com> +Upstream-Status: Submitted [https://lore.kernel.org/all/20211125174200.133230-1-mst@redhat.com/] +--- + drivers/bluetooth/virtio_bt.c | 18 ++++++++++++++++-- + 1 file changed, 16 insertions(+), 2 deletions(-) + +diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c +index 076e4942a3f0..0ce1778babe6 100644 +--- a/drivers/bluetooth/virtio_bt.c ++++ b/drivers/bluetooth/virtio_bt.c +@@ -50,8 +50,11 @@ static int virtbt_add_inbuf(struct virtio_bluetooth *vbt) + + static int virtbt_open(struct hci_dev *hdev) + { +- struct virtio_bluetooth *vbt = hci_get_drvdata(hdev); ++ return 0; ++} + ++static int virtbt_open_vdev(struct virtio_bluetooth *vbt) ++{ + if (virtbt_add_inbuf(vbt) < 0) + return -EIO; + +@@ -61,7 +64,11 @@ static int virtbt_open(struct hci_dev *hdev) + + static int virtbt_close(struct hci_dev *hdev) + { +- struct virtio_bluetooth *vbt = hci_get_drvdata(hdev); ++ return 0; ++} ++ ++static int virtbt_close_vdev(struct virtio_bluetooth *vbt) ++{ + int i; + + cancel_work_sync(&vbt->rx); +@@ -354,8 +361,14 @@ static int virtbt_probe(struct virtio_device *vdev) + goto failed; + } + ++ virtio_device_ready(vdev); ++ if (virtbt_open_vdev(vbt)) ++ goto open_failed; ++ + return 0; + ++open_failed: ++ hci_free_dev(hdev); + failed: + vdev->config->del_vqs(vdev); + return err; +@@ -368,6 +381,7 @@ static void virtbt_remove(struct virtio_device *vdev) + + hci_unregister_dev(hdev); + vdev->config->reset(vdev); ++ virtbt_close_vdev(vbt); + + hci_free_dev(hdev); + vbt->hdev = NULL; +-- +2.35.1 + diff --git a/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio_bt.cfg b/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio_bt.cfg new file mode 100644 index 00000000..154a05d5 --- /dev/null +++ b/meta-egvirt/recipes-kernel/linux/linux-yocto/virtio_bt.cfg @@ -0,0 +1,7 @@ +# Enable BT_VIRTIO ("Virtio Bluetooth driver") config located in menu +# +# -> Networking support (NET [=y]) │ +# -> Bluetooth subsystem support (BT [=m]) │ +# -> Bluetooth device drivers │ +# +CONFIG_BT_VIRTIO=m diff --git a/meta-egvirt/recipes-kernel/linux/linux-yocto_%.bbappend b/meta-egvirt/recipes-kernel/linux/linux-yocto_%.bbappend index 2dba2566..d646f535 100644 --- a/meta-egvirt/recipes-kernel/linux/linux-yocto_%.bbappend +++ b/meta-egvirt/recipes-kernel/linux/linux-yocto_%.bbappend @@ -5,3 +5,9 @@ SRC_URI += " \ file://0001-drivers-media-Add-config-option-for-virtio-video.patch \ file://virtio_video.cfg \ " + +# virtio BT +SRC_URI += " \ + file://virtio_bt.cfg \ + file://0002-Bluetooth-virtio_bt-fix-device-removal.patch \ +" |