v4l2-compliance -m /dev/media0 -a -f
Total for uvcvideo device /dev/media0: 8, Succeeded: 6, Failed: 2, Warnings: 0
Total for uvcvideo device /dev/video0: 54, Succeeded: 50, Failed: 4, Warnings: 2
Total for uvcvideo device /dev/video1: 46, Succeeded: 46, Failed: 0, Warnings: 0
Grand Total for uvcvideo device /dev/media0: 108, Succeeded: 102,
Failed: 6, Warnings: 2
After fixing all of them we go down to:
Total for uvcvideo device /dev/media0: 8, Succeeded: 8, Failed: 0, Warnings: 0
Total for uvcvideo device /dev/video0: 54, Succeeded: 54, Failed: 0, Warnings: 0
Total for uvcvideo device /dev/video1: 46, Succeeded: 46, Failed: 0, Warnings: 0
Grand Total for uvcvideo device /dev/media0: 108, Succeeded: 108,
Failed: 0, Warnings: 0
YES, NO MORE WARNINGS :)
Note that we depend on:
https://patchwork.linuxtv.org/project/linux-media/patch/[email protected]/
With Hans patch we can also pass v4l2-compliance -s.
Changelog from v5 (Thanks to Hans)
- Move more checks to framework
- Rewrite the framework check_ext_ctrls
- Rewrite ctrl_is_inactive
- Add function ctrl_is_accessible
- Use ioctl name instead of boolean values
Hans Verkuil (1):
uvc: use vb2 ioctl and fop helpers
Ricardo Ribalda (16):
media: v4l2-ioctl: check_ext_ctrls: Fix multiclass
V4L2_CTRL_WHICH_DEF_VAL
media: v4l2-ioctl: check_ext_ctrls: Return -EINVAL on
V4L2_CTRL_WHICH_REQUEST_VAL
media: v4l2-ioctl: check_ext_ctrls: Return the right error_idx
media: v4l2-ioctl: check_ext_ctrls: Fix V4L2_CTRL_WHICH_DEF_VAL
media: pvrusb2: Do not check for V4L2_CTRL_WHICH_DEF_VAL
media: uvcvideo: Do not check for V4L2_CTRL_WHICH_DEF_VAL
media: uvcvideo: Set capability in s_param
media: uvcvideo: Return -EIO for control errors
media: uvcvideo: refactor __uvc_ctrl_add_mapping
media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS
media: uvcvideo: Use dev->name for querycap()
media: uvcvideo: Set unique vdev name based in type
media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE
media: uvcvideo: Use control names from framework
media: uvcvideo: Check controls flags before accessing them
media: uvcvideo: Return -EACCES to inactive controls
drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | 4 -
drivers/media/usb/uvc/uvc_ctrl.c | 284 ++++++++++++++----
drivers/media/usb/uvc/uvc_driver.c | 22 +-
drivers/media/usb/uvc/uvc_metadata.c | 8 +-
drivers/media/usb/uvc/uvc_queue.c | 143 ---------
drivers/media/usb/uvc/uvc_v4l2.c | 352 +++++------------------
drivers/media/usb/uvc/uvc_video.c | 13 +-
drivers/media/usb/uvc/uvcvideo.h | 43 +--
drivers/media/v4l2-core/v4l2-ioctl.c | 59 ++--
9 files changed, 366 insertions(+), 562 deletions(-)
--
2.31.0.rc2.261.g7f71774620-goog
The framework already contains a map of IDs to names, lets use it when
possible.
Signed-off-by: Ricardo Ribalda <[email protected]>
Reviewed-by: Hans Verkuil <[email protected]>
Suggested-by: Hans Verkuil <[email protected]>
---
drivers/media/usb/uvc/uvc_ctrl.c | 57 ++++++++++++--------------------
drivers/media/usb/uvc/uvc_v4l2.c | 8 ++++-
drivers/media/usb/uvc/uvcvideo.h | 2 +-
3 files changed, 30 insertions(+), 37 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index ba14733db757..929e70dff11a 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -436,7 +436,6 @@ static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping,
static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
{
.id = V4L2_CID_BRIGHTNESS,
- .name = "Brightness",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BRIGHTNESS_CONTROL,
.size = 16,
@@ -446,7 +445,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_CONTRAST,
- .name = "Contrast",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_CONTRAST_CONTROL,
.size = 16,
@@ -456,7 +454,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_HUE,
- .name = "Hue",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_CONTROL,
.size = 16,
@@ -468,7 +465,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_SATURATION,
- .name = "Saturation",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SATURATION_CONTROL,
.size = 16,
@@ -478,7 +474,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_SHARPNESS,
- .name = "Sharpness",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SHARPNESS_CONTROL,
.size = 16,
@@ -488,7 +483,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_GAMMA,
- .name = "Gamma",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAMMA_CONTROL,
.size = 16,
@@ -498,7 +492,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_BACKLIGHT_COMPENSATION,
- .name = "Backlight Compensation",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
.size = 16,
@@ -508,7 +501,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_GAIN,
- .name = "Gain",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAIN_CONTROL,
.size = 16,
@@ -518,7 +510,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_POWER_LINE_FREQUENCY,
- .name = "Power Line Frequency",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
@@ -530,7 +521,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_HUE_AUTO,
- .name = "Hue, Auto",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_AUTO_CONTROL,
.size = 1,
@@ -541,7 +531,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_EXPOSURE_AUTO,
- .name = "Exposure, Auto",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_MODE_CONTROL,
.size = 4,
@@ -554,7 +543,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_EXPOSURE_AUTO_PRIORITY,
- .name = "Exposure, Auto Priority",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_PRIORITY_CONTROL,
.size = 1,
@@ -564,7 +552,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_EXPOSURE_ABSOLUTE,
- .name = "Exposure (Absolute)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
.size = 32,
@@ -576,7 +563,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_AUTO_WHITE_BALANCE,
- .name = "White Balance Temperature, Auto",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
.size = 1,
@@ -587,7 +573,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
- .name = "White Balance Temperature",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
.size = 16,
@@ -599,7 +584,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_AUTO_WHITE_BALANCE,
- .name = "White Balance Component, Auto",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
.size = 1,
@@ -611,7 +595,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_BLUE_BALANCE,
- .name = "White Balance Blue Component",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
.size = 16,
@@ -623,7 +606,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_RED_BALANCE,
- .name = "White Balance Red Component",
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
.size = 16,
@@ -635,7 +617,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_FOCUS_ABSOLUTE,
- .name = "Focus (absolute)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
.size = 16,
@@ -647,7 +628,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_FOCUS_AUTO,
- .name = "Focus, Auto",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_AUTO_CONTROL,
.size = 1,
@@ -658,7 +638,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_IRIS_ABSOLUTE,
- .name = "Iris, Absolute",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
.size = 16,
@@ -668,7 +647,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_IRIS_RELATIVE,
- .name = "Iris, Relative",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_RELATIVE_CONTROL,
.size = 8,
@@ -678,7 +656,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_ZOOM_ABSOLUTE,
- .name = "Zoom, Absolute",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
.size = 16,
@@ -688,7 +665,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_ZOOM_CONTINUOUS,
- .name = "Zoom, Continuous",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
.size = 0,
@@ -700,7 +676,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_PAN_ABSOLUTE,
- .name = "Pan (Absolute)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
.size = 32,
@@ -710,7 +685,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_TILT_ABSOLUTE,
- .name = "Tilt (Absolute)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
.size = 32,
@@ -720,7 +694,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_PAN_SPEED,
- .name = "Pan (Speed)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
.size = 16,
@@ -732,7 +705,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_TILT_SPEED,
- .name = "Tilt (Speed)",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
.size = 16,
@@ -744,7 +716,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_PRIVACY,
- .name = "Privacy",
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PRIVACY_CONTROL,
.size = 1,
@@ -754,7 +725,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
{
.id = V4L2_CID_PRIVACY,
- .name = "Privacy",
.entity = UVC_GUID_EXT_GPIO_CONTROLLER,
.selector = UVC_CT_PRIVACY_CONTROL,
.size = 1,
@@ -1076,6 +1046,20 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
return 0;
}
+static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
+{
+ const char *name;
+
+ if (map->name)
+ return map->name;
+
+ name = v4l2_ctrl_get_name(map->id);
+ if (name)
+ return name;
+
+ return "Unknown Control";
+}
+
static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
@@ -1089,7 +1073,8 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
v4l2_ctrl->id = mapping->id;
v4l2_ctrl->type = mapping->v4l2_type;
- strscpy(v4l2_ctrl->name, mapping->name, sizeof(v4l2_ctrl->name));
+ strscpy(v4l2_ctrl->name, uvc_map_get_name(mapping),
+ sizeof(v4l2_ctrl->name));
v4l2_ctrl->flags = 0;
if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
@@ -2181,7 +2166,8 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
list_add_tail(&map->list, &ctrl->info.mappings);
uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n",
- map->name, ctrl->info.entity, ctrl->info.selector);
+ uvc_map_get_name(map), ctrl->info.entity,
+ ctrl->info.selector);
return 0;
}
@@ -2199,7 +2185,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
if (mapping->id & ~V4L2_CTRL_ID_MASK) {
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', control id 0x%08x is invalid\n",
- mapping->name, mapping->id);
+ uvc_map_get_name(mapping), mapping->id);
return -EINVAL;
}
@@ -2246,7 +2232,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
if (mapping->id == map->id) {
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', control id 0x%08x already exists\n",
- mapping->name, mapping->id);
+ uvc_map_get_name(mapping), mapping->id);
ret = -EEXIST;
goto done;
}
@@ -2257,7 +2243,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
atomic_dec(&dev->nmappings);
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', maximum mappings count (%u) exceeded\n",
- mapping->name, UVC_MAX_CONTROL_MAPPINGS);
+ uvc_map_get_name(mapping), UVC_MAX_CONTROL_MAPPINGS);
ret = -ENOMEM;
goto done;
}
@@ -2466,6 +2452,7 @@ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
list_del(&mapping->list);
kfree(mapping->menu_info);
+ kfree(mapping->name);
kfree(mapping);
}
}
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index dd10cb9361fa..ed262f61e6a6 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -40,7 +40,13 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
return -ENOMEM;
map->id = xmap->id;
- memcpy(map->name, xmap->name, sizeof(map->name));
+ /* Non standard control id. */
+ if (v4l2_ctrl_get_name(map->id) == NULL) {
+ map->name = kmemdup(xmap->name, sizeof(xmap->name),
+ GFP_KERNEL);
+ if (!map->name)
+ return -ENOMEM;
+ }
memcpy(map->entity, xmap->entity, sizeof(map->entity));
map->selector = xmap->selector;
map->size = xmap->size;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index a26bbec8d37b..dc20021f7ee0 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -240,7 +240,7 @@ struct uvc_control_mapping {
struct list_head ev_subs;
u32 id;
- u8 name[32];
+ char *name;
u8 entity[16];
u8 selector;
--
2.31.0.rc2.261.g7f71774620-goog
All the entities must have a unique name. We can have a descriptive and
unique name by appending the function and the entity->id.
This is even resilent to multi chain devices.
Fixes v4l2-compliance:
Media Controller ioctls:
fail: v4l2-test-media.cpp(205): v2_entity_names_set.find(key) != v2_entity_names_set.end()
test MEDIA_IOC_G_TOPOLOGY: FAIL
fail: v4l2-test-media.cpp(394): num_data_links != num_links
test MEDIA_IOC_ENUM_ENTITIES/LINKS: FAIL
Signed-off-by: Ricardo Ribalda <[email protected]>
Reviewed-by: Hans Verkuil <[email protected]>
---
drivers/media/usb/uvc/uvc_driver.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 35873cf2773d..76ab6acecbc9 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2163,6 +2163,7 @@ int uvc_register_video_device(struct uvc_device *dev,
const struct v4l2_ioctl_ops *ioctl_ops)
{
int ret;
+ const char *name;
/* Initialize the video buffers queue. */
ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
@@ -2190,16 +2191,20 @@ int uvc_register_video_device(struct uvc_device *dev,
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
default:
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ name = "Video Capture";
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ name = "Video Output";
break;
case V4L2_BUF_TYPE_META_CAPTURE:
vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
+ name = "Metadata";
break;
}
- strscpy(vdev->name, dev->name, sizeof(vdev->name));
+ snprintf(vdev->name, sizeof(vdev->name), "%s %u", name,
+ stream->header.bTerminalLink);
/*
* Set the driver data before calling video_register_device, otherwise
--
2.31.0.rc2.261.g7f71774620-goog
Hans has discovered that in his test device, for the H264 format
bytesused goes up to about 570, for YUYV it will actually go up
to a bit over 5000 bytes, and for MJPG up to about 2706 bytes.
We should also, according to V4L2_META_FMT_UVC docs, drop headers when
the buffer is full.
Credit-to: Hans Verkuil <[email protected]>
Reviewed-by: Hans Verkuil <[email protected]>
Signed-off-by: Ricardo Ribalda <[email protected]>
---
drivers/media/usb/uvc/uvc_video.c | 8 +++++---
drivers/media/usb/uvc/uvcvideo.h | 2 +-
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 25fd8aa23529..ea2903dc3252 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1244,11 +1244,13 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream,
if (!meta_buf || length == 2)
return;
+ /*
+ * According to V4L2_META_FMT_UVC docs, we should drop headers when
+ * the buffer is full.
+ */
if (meta_buf->length - meta_buf->bytesused <
- length + sizeof(meta->ns) + sizeof(meta->sof)) {
- meta_buf->error = 1;
+ length + sizeof(meta->ns) + sizeof(meta->sof))
return;
- }
has_pts = mem[1] & UVC_STREAM_PTS;
has_scr = mem[1] & UVC_STREAM_SCR;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index b81d3f65e52e..a26bbec8d37b 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -527,7 +527,7 @@ struct uvc_stats_stream {
unsigned int max_sof; /* Maximum STC.SOF value */
};
-#define UVC_METADATA_BUF_SIZE 1024
+#define UVC_METADATA_BUF_SIZE 10240
/**
* struct uvc_copy_op: Context structure to schedule asynchronous memcpy
--
2.31.0.rc2.261.g7f71774620-goog
If a control is inactive return -EACCES to let the userspace know that
the value will not be applied automatically when the control is active
again.
Signed-off-by: Ricardo Ribalda <[email protected]>
Suggested-by: Hans Verkuil <[email protected]>
---
drivers/media/usb/uvc/uvc_ctrl.c | 73 +++++++++++++++++++++++++-------
drivers/media/usb/uvc/uvc_v4l2.c | 11 ++++-
drivers/media/usb/uvc/uvcvideo.h | 3 +-
3 files changed, 69 insertions(+), 18 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index af1d4d9b8afb..26d3494b401b 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1046,10 +1046,62 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
return 0;
}
-int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
+static bool uvc_ctrl_is_inactive(struct uvc_video_chain *chain,
+ struct uvc_control *ctrl,
+ struct uvc_control_mapping *mapping)
+{
+ struct uvc_control_mapping *master_map = NULL;
+ struct uvc_control *master_ctrl = NULL;
+ s32 val;
+ int ret;
+
+ if (!mapping->master_id)
+ return false;
+
+ __uvc_find_control(ctrl->entity, mapping->master_id, &master_map,
+ &master_ctrl, 0);
+
+ if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
+ return false;
+
+ ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
+ if (ret < 0 || val == mapping->master_manual)
+ return false;
+
+ return true;
+}
+
+int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
+ unsigned long ioctl)
{
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
+ bool read, try;
+
+ switch (ioctl) {
+ case VIDIOC_G_EXT_CTRLS:
+ read = true;
+ try = false;
+ break;
+ case VIDIOC_S_EXT_CTRLS:
+ read = false;
+ try = false;
+ break;
+ case VIDIOC_TRY_EXT_CTRLS:
+ read = false;
+ try = true;
+ break;
+ case VIDIOC_G_CTRL:
+ read = true;
+ try = false;
+ break;
+ case VIDIOC_S_CTRL:
+ read = false;
+ try = false;
+ break;
+ default:
+ return -EINVAL;
+ }
if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
return -EACCES;
@@ -1064,6 +1116,9 @@ int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
return -EACCES;
+ if (!read && !try && uvc_ctrl_is_inactive(chain, ctrl, mapping))
+ return -EACCES;
+
return 0;
}
@@ -1086,8 +1141,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control_mapping *mapping,
struct v4l2_queryctrl *v4l2_ctrl)
{
- struct uvc_control_mapping *master_map = NULL;
- struct uvc_control *master_ctrl = NULL;
const struct uvc_menu_info *menu;
unsigned int i;
@@ -1103,18 +1156,8 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
- if (mapping->master_id)
- __uvc_find_control(ctrl->entity, mapping->master_id,
- &master_map, &master_ctrl, 0);
- if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) {
- s32 val;
- int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
- if (ret < 0)
- return ret;
-
- if (val != mapping->master_manual)
- v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
- }
+ if (uvc_ctrl_is_inactive(chain, ctrl, mapping))
+ v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
if (!ctrl->cached) {
int ret = uvc_ctrl_populate_cache(chain, ctrl);
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index ce55b4bff687..8e9051a245c7 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -999,6 +999,10 @@ static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
struct v4l2_ext_control xctrl;
int ret;
+ ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_G_CTRL);
+ if (ret)
+ return ret;
+
memset(&xctrl, 0, sizeof(xctrl));
xctrl.id = ctrl->id;
@@ -1023,6 +1027,10 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
struct v4l2_ext_control xctrl;
int ret;
+ ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_S_CTRL);
+ if (ret)
+ return ret;
+
memset(&xctrl, 0, sizeof(xctrl));
xctrl.id = ctrl->id;
xctrl.value = ctrl->value;
@@ -1054,8 +1062,7 @@ static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
int ret = 0;
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
- ret = uvc_ctrl_is_accesible(chain, ctrl->id,
- ioctl == VIDIOC_G_EXT_CTRLS);
+ ret = uvc_ctrl_is_accesible(chain, ctrl->id, ioctl);
if (ret)
break;
}
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 3288b118264e..4e86d0983d58 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -902,7 +902,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
-int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);
+int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
+ unsigned long ioctl);
int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control_query *xqry);
--
2.31.0.rc2.261.g7f71774620-goog
From: Hans Verkuil <[email protected]>
When uvc was written the vb2 ioctl and file operation helpers didn't exist.
This patch switches uvc over to those helpers, which removes a lot of boilerplate
code and simplifies VIDIOC_G/S_PRIORITY handling and allows us to drop the
'privileges' scheme, since that's now handled inside the vb2 helpers.
This makes it possible for uvc to pass the v4l2-compliance streaming tests.
Signed-off-by: Hans Verkuil <[email protected]>
---
drivers/media/usb/uvc/uvc_driver.c | 7 +-
drivers/media/usb/uvc/uvc_metadata.c | 8 +-
drivers/media/usb/uvc/uvc_queue.c | 143 -------------
drivers/media/usb/uvc/uvc_v4l2.c | 288 ++-------------------------
drivers/media/usb/uvc/uvcvideo.h | 32 ---
5 files changed, 25 insertions(+), 453 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 76ab6acecbc9..1a38ea31e218 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1911,7 +1911,6 @@ static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
INIT_LIST_HEAD(&chain->entities);
mutex_init(&chain->ctrl_mutex);
chain->dev = dev;
- v4l2_prio_init(&chain->prio);
return chain;
}
@@ -2181,7 +2180,7 @@ int uvc_register_video_device(struct uvc_device *dev,
vdev->fops = fops;
vdev->ioctl_ops = ioctl_ops;
vdev->release = uvc_release;
- vdev->prio = &stream->chain->prio;
+ vdev->queue = &queue->queue;
if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
vdev->vfl_dir = VFL_DIR_TX;
else
@@ -2546,8 +2545,8 @@ static int __uvc_resume(struct usb_interface *intf, int reset)
if (stream->intf == intf) {
ret = uvc_video_resume(stream, reset);
if (ret < 0)
- uvc_queue_streamoff(&stream->queue,
- stream->queue.queue.type);
+ vb2_streamoff(&stream->queue.queue,
+ stream->queue.queue.type);
return ret;
}
}
diff --git a/drivers/media/usb/uvc/uvc_metadata.c b/drivers/media/usb/uvc/uvc_metadata.c
index b6279ad7ac84..849d8e5ab75d 100644
--- a/drivers/media/usb/uvc/uvc_metadata.c
+++ b/drivers/media/usb/uvc/uvc_metadata.c
@@ -96,7 +96,7 @@ static int uvc_meta_v4l2_set_format(struct file *file, void *fh,
*/
mutex_lock(&stream->mutex);
- if (uvc_queue_allocated(&stream->queue))
+ if (vb2_is_busy(&stream->meta.queue.queue))
ret = -EBUSY;
else
stream->meta.format = fmt->dataformat;
@@ -164,12 +164,6 @@ int uvc_meta_register(struct uvc_streaming *stream)
stream->meta.format = V4L2_META_FMT_UVC;
- /*
- * The video interface queue uses manual locking and thus does not set
- * the queue pointer. Set it manually here.
- */
- vdev->queue = &queue->queue;
-
return uvc_register_video_device(dev, stream, vdev, queue,
V4L2_BUF_TYPE_META_CAPTURE,
&uvc_meta_fops, &uvc_meta_ioctl_ops);
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index 21a907d32bb7..437e48b32480 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -247,153 +247,10 @@ int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
return 0;
}
-void uvc_queue_release(struct uvc_video_queue *queue)
-{
- mutex_lock(&queue->mutex);
- vb2_queue_release(&queue->queue);
- mutex_unlock(&queue->mutex);
-}
-
-/* -----------------------------------------------------------------------------
- * V4L2 queue operations
- */
-
-int uvc_request_buffers(struct uvc_video_queue *queue,
- struct v4l2_requestbuffers *rb)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_reqbufs(&queue->queue, rb);
- mutex_unlock(&queue->mutex);
-
- return ret ? ret : rb->count;
-}
-
-int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_querybuf(&queue->queue, buf);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_create_buffers(struct uvc_video_queue *queue,
- struct v4l2_create_buffers *cb)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_create_bufs(&queue->queue, cb);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_queue_buffer(struct uvc_video_queue *queue,
- struct media_device *mdev, struct v4l2_buffer *buf)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_qbuf(&queue->queue, mdev, buf);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_export_buffer(struct uvc_video_queue *queue,
- struct v4l2_exportbuffer *exp)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_expbuf(&queue->queue, exp);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
- int nonblocking)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_dqbuf(&queue->queue, buf, nonblocking);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_streamon(&queue->queue, type);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type)
-{
- int ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_streamoff(&queue->queue, type);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
-int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma)
-{
- return vb2_mmap(&queue->queue, vma);
-}
-
-#ifndef CONFIG_MMU
-unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
- unsigned long pgoff)
-{
- return vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0);
-}
-#endif
-
-__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
- poll_table *wait)
-{
- __poll_t ret;
-
- mutex_lock(&queue->mutex);
- ret = vb2_poll(&queue->queue, file, wait);
- mutex_unlock(&queue->mutex);
-
- return ret;
-}
-
/* -----------------------------------------------------------------------------
*
*/
-/*
- * Check if buffers have been allocated.
- */
-int uvc_queue_allocated(struct uvc_video_queue *queue)
-{
- int allocated;
-
- mutex_lock(&queue->mutex);
- allocated = vb2_is_busy(&queue->queue);
- mutex_unlock(&queue->mutex);
-
- return allocated;
-}
-
/*
* Cancel the video buffers queue.
*
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 8e9051a245c7..1d706a475896 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -352,17 +352,13 @@ static int uvc_v4l2_set_format(struct uvc_streaming *stream,
return ret;
mutex_lock(&stream->mutex);
-
- if (uvc_queue_allocated(&stream->queue)) {
+ if (vb2_is_busy(&stream->queue.queue)) {
ret = -EBUSY;
- goto done;
+ } else {
+ stream->ctrl = probe;
+ stream->cur_format = format;
+ stream->cur_frame = frame;
}
-
- stream->ctrl = probe;
- stream->cur_format = format;
- stream->cur_frame = frame;
-
-done:
mutex_unlock(&stream->mutex);
return ret;
}
@@ -489,62 +485,6 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
return 0;
}
-/* ------------------------------------------------------------------------
- * Privilege management
- */
-
-/*
- * Privilege management is the multiple-open implementation basis. The current
- * implementation is completely transparent for the end-user and doesn't
- * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
- * Those ioctls enable finer control on the device (by making possible for a
- * user to request exclusive access to a device), but are not mature yet.
- * Switching to the V4L2 priority mechanism might be considered in the future
- * if this situation changes.
- *
- * Each open instance of a UVC device can either be in a privileged or
- * unprivileged state. Only a single instance can be in a privileged state at
- * a given time. Trying to perform an operation that requires privileges will
- * automatically acquire the required privileges if possible, or return -EBUSY
- * otherwise. Privileges are dismissed when closing the instance or when
- * freeing the video buffers using VIDIOC_REQBUFS.
- *
- * Operations that require privileges are:
- *
- * - VIDIOC_S_INPUT
- * - VIDIOC_S_PARM
- * - VIDIOC_S_FMT
- * - VIDIOC_REQBUFS
- */
-static int uvc_acquire_privileges(struct uvc_fh *handle)
-{
- /* Always succeed if the handle is already privileged. */
- if (handle->state == UVC_HANDLE_ACTIVE)
- return 0;
-
- /* Check if the device already has a privileged handle. */
- if (atomic_inc_return(&handle->stream->active) != 1) {
- atomic_dec(&handle->stream->active);
- return -EBUSY;
- }
-
- handle->state = UVC_HANDLE_ACTIVE;
- return 0;
-}
-
-static void uvc_dismiss_privileges(struct uvc_fh *handle)
-{
- if (handle->state == UVC_HANDLE_ACTIVE)
- atomic_dec(&handle->stream->active);
-
- handle->state = UVC_HANDLE_PASSIVE;
-}
-
-static int uvc_has_privileges(struct uvc_fh *handle)
-{
- return handle->state == UVC_HANDLE_ACTIVE;
-}
-
/* ------------------------------------------------------------------------
* V4L2 file operations
*/
@@ -587,7 +527,6 @@ static int uvc_v4l2_open(struct file *file)
v4l2_fh_add(&handle->vfh);
handle->chain = stream->chain;
handle->stream = stream;
- handle->state = UVC_HANDLE_PASSIVE;
file->private_data = handle;
return 0;
@@ -600,15 +539,8 @@ static int uvc_v4l2_release(struct file *file)
uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
- /* Only free resources if this is a privileged handle. */
- if (uvc_has_privileges(handle))
- uvc_queue_release(&stream->queue);
-
/* Release the file handle. */
- uvc_dismiss_privileges(handle);
- v4l2_fh_del(&handle->vfh);
- v4l2_fh_exit(&handle->vfh);
- kfree(handle);
+ vb2_fop_release(file);
file->private_data = NULL;
mutex_lock(&stream->dev->lock);
@@ -701,11 +633,6 @@ static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
return uvc_v4l2_set_format(stream, fmt);
}
@@ -715,11 +642,6 @@ static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
return uvc_v4l2_set_format(stream, fmt);
}
@@ -744,124 +666,6 @@ static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
}
-static int uvc_ioctl_reqbufs(struct file *file, void *fh,
- struct v4l2_requestbuffers *rb)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
-
- mutex_lock(&stream->mutex);
- ret = uvc_request_buffers(&stream->queue, rb);
- mutex_unlock(&stream->mutex);
- if (ret < 0)
- return ret;
-
- if (ret == 0)
- uvc_dismiss_privileges(handle);
-
- return 0;
-}
-
-static int uvc_ioctl_querybuf(struct file *file, void *fh,
- struct v4l2_buffer *buf)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_query_buffer(&stream->queue, buf);
-}
-
-static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_queue_buffer(&stream->queue,
- stream->vdev.v4l2_dev->mdev, buf);
-}
-
-static int uvc_ioctl_expbuf(struct file *file, void *fh,
- struct v4l2_exportbuffer *exp)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_export_buffer(&stream->queue, exp);
-}
-
-static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_dequeue_buffer(&stream->queue, buf,
- file->f_flags & O_NONBLOCK);
-}
-
-static int uvc_ioctl_create_bufs(struct file *file, void *fh,
- struct v4l2_create_buffers *cb)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
-
- return uvc_create_buffers(&stream->queue, cb);
-}
-
-static int uvc_ioctl_streamon(struct file *file, void *fh,
- enum v4l2_buf_type type)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
- int ret;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- mutex_lock(&stream->mutex);
- ret = uvc_queue_streamon(&stream->queue, type);
- mutex_unlock(&stream->mutex);
-
- return ret;
-}
-
-static int uvc_ioctl_streamoff(struct file *file, void *fh,
- enum v4l2_buf_type type)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- mutex_lock(&stream->mutex);
- uvc_queue_streamoff(&stream->queue, type);
- mutex_unlock(&stream->mutex);
-
- return 0;
-}
-
static int uvc_ioctl_enum_input(struct file *file, void *fh,
struct v4l2_input *input)
{
@@ -929,13 +733,12 @@ static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input)
static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
{
struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
struct uvc_video_chain *chain = handle->chain;
- int ret;
u32 i;
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
+ if (vb2_is_busy(&stream->queue.queue))
+ return -EBUSY;
if (chain->selector == NULL ||
(chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
@@ -1227,11 +1030,6 @@ static int uvc_ioctl_s_parm(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = uvc_acquire_privileges(handle);
- if (ret < 0)
- return ret;
return uvc_v4l2_set_streamparm(stream, parm);
}
@@ -1499,50 +1297,6 @@ static long uvc_v4l2_compat_ioctl32(struct file *file,
}
#endif
-static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
- size_t count, loff_t *ppos)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_dbg(stream->dev, CALLS, "%s: not implemented\n", __func__);
- return -EINVAL;
-}
-
-static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
- return uvc_queue_mmap(&stream->queue, vma);
-}
-
-static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
- return uvc_queue_poll(&stream->queue, file, wait);
-}
-
-#ifndef CONFIG_MMU
-static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
- unsigned long addr, unsigned long len, unsigned long pgoff,
- unsigned long flags)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
-
- return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
-}
-#endif
-
const struct v4l2_ioctl_ops uvc_ioctl_ops = {
.vidioc_querycap = uvc_ioctl_querycap,
.vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
@@ -1553,14 +1307,15 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
.vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
.vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
.vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
- .vidioc_reqbufs = uvc_ioctl_reqbufs,
- .vidioc_querybuf = uvc_ioctl_querybuf,
- .vidioc_qbuf = uvc_ioctl_qbuf,
- .vidioc_expbuf = uvc_ioctl_expbuf,
- .vidioc_dqbuf = uvc_ioctl_dqbuf,
- .vidioc_create_bufs = uvc_ioctl_create_bufs,
- .vidioc_streamon = uvc_ioctl_streamon,
- .vidioc_streamoff = uvc_ioctl_streamoff,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_enum_input = uvc_ioctl_enum_input,
.vidioc_g_input = uvc_ioctl_g_input,
.vidioc_s_input = uvc_ioctl_s_input,
@@ -1590,11 +1345,10 @@ const struct v4l2_file_operations uvc_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl32 = uvc_v4l2_compat_ioctl32,
#endif
- .read = uvc_v4l2_read,
- .mmap = uvc_v4l2_mmap,
- .poll = uvc_v4l2_poll,
+ .mmap = vb2_fop_mmap,
+ .poll = vb2_fop_poll,
#ifndef CONFIG_MMU
- .get_unmapped_area = uvc_v4l2_get_unmapped_area,
+ .get_unmapped_area = vb2_fop_get_unmapped_area,
#endif
};
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 4e86d0983d58..4d13e0ecd8f7 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -477,7 +477,6 @@ struct uvc_video_chain {
struct mutex ctrl_mutex; /* Protects ctrl.info */
- struct v4l2_prio_state prio; /* V4L2 priority state */
u32 caps; /* V4L2 chain-wide caps */
u8 ctrl_class_bitmap; /* Bitmap of valid classes */
};
@@ -714,16 +713,10 @@ struct uvc_device {
struct uvc_entity *gpio_unit;
};
-enum uvc_handle_state {
- UVC_HANDLE_PASSIVE = 0,
- UVC_HANDLE_ACTIVE = 1,
-};
-
struct uvc_fh {
struct v4l2_fh vfh;
struct uvc_video_chain *chain;
struct uvc_streaming *stream;
- enum uvc_handle_state state;
};
struct uvc_driver {
@@ -788,36 +781,11 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
/* Video buffers queue management. */
int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
int drop_corrupted);
-void uvc_queue_release(struct uvc_video_queue *queue);
-int uvc_request_buffers(struct uvc_video_queue *queue,
- struct v4l2_requestbuffers *rb);
-int uvc_query_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf);
-int uvc_create_buffers(struct uvc_video_queue *queue,
- struct v4l2_create_buffers *v4l2_cb);
-int uvc_queue_buffer(struct uvc_video_queue *queue,
- struct media_device *mdev,
- struct v4l2_buffer *v4l2_buf);
-int uvc_export_buffer(struct uvc_video_queue *queue,
- struct v4l2_exportbuffer *exp);
-int uvc_dequeue_buffer(struct uvc_video_queue *queue,
- struct v4l2_buffer *v4l2_buf, int nonblocking);
-int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
-int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
struct uvc_buffer *buf);
struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
void uvc_queue_buffer_release(struct uvc_buffer *buf);
-int uvc_queue_mmap(struct uvc_video_queue *queue,
- struct vm_area_struct *vma);
-__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
- poll_table *wait);
-#ifndef CONFIG_MMU
-unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
- unsigned long pgoff);
-#endif
-int uvc_queue_allocated(struct uvc_video_queue *queue);
static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
return vb2_is_streaming(&queue->queue);
--
2.31.0.rc2.261.g7f71774620-goog
We can figure out if reading/writing a set of controls can fail without
accessing them by checking their flags.
This way we can honor the API closer:
If an error is found when validating the list of controls passed with
VIDIOC_G_EXT_CTRLS, then error_idx shall be set to ctrls->count to
indicate to userspace that no actual hardware was touched.
Fixes v4l2-compliance:
Control ioctls (Input 0):
warn: v4l2-test-controls.cpp(765): g_ext_ctrls(0) invalid error_idx 0
fail: v4l2-test-controls.cpp(645): invalid error index write only control
test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
Signed-off-by: Ricardo Ribalda <[email protected]>
---
drivers/media/usb/uvc/uvc_ctrl.c | 21 +++++++++++++++++
drivers/media/usb/uvc/uvc_v4l2.c | 39 ++++++++++++++++++++++++++++----
drivers/media/usb/uvc/uvcvideo.h | 1 +
3 files changed, 56 insertions(+), 5 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 929e70dff11a..af1d4d9b8afb 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -1046,6 +1046,27 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
return 0;
}
+int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
+{
+ struct uvc_control_mapping *mapping;
+ struct uvc_control *ctrl;
+
+ if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
+ return -EACCES;
+
+ ctrl = uvc_find_control(chain, v4l2_id, &mapping);
+ if (!ctrl)
+ return -EINVAL;
+
+ if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read)
+ return -EACCES;
+
+ if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
+ return -EACCES;
+
+ return 0;
+}
+
static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
{
const char *name;
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index ed262f61e6a6..ce55b4bff687 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -1045,6 +1045,26 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
return 0;
}
+static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
+ struct v4l2_ext_controls *ctrls,
+ unsigned long ioctl)
+{
+ struct v4l2_ext_control *ctrl = ctrls->controls;
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+ ret = uvc_ctrl_is_accesible(chain, ctrl->id,
+ ioctl == VIDIOC_G_EXT_CTRLS);
+ if (ret)
+ break;
+ }
+
+ ctrls->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : ctrls->count;
+
+ return ret;
+}
+
static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
struct v4l2_ext_controls *ctrls)
{
@@ -1054,6 +1074,10 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
unsigned int i;
int ret;
+ ret = uvc_ctrl_check_access(chain, ctrls, VIDIOC_G_EXT_CTRLS);
+ if (ret < 0)
+ return ret;
+
if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
struct v4l2_queryctrl qc = { .id = ctrl->id };
@@ -1090,13 +1114,17 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
struct v4l2_ext_controls *ctrls,
- bool commit)
+ unsigned long ioctl)
{
struct v4l2_ext_control *ctrl = ctrls->controls;
struct uvc_video_chain *chain = handle->chain;
unsigned int i;
int ret;
+ ret = uvc_ctrl_check_access(chain, ctrls, ioctl);
+ if (ret < 0)
+ return ret;
+
ret = uvc_ctrl_begin(chain);
if (ret < 0)
return ret;
@@ -1105,14 +1133,15 @@ static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
ret = uvc_ctrl_set(handle, ctrl);
if (ret < 0) {
uvc_ctrl_rollback(handle);
- ctrls->error_idx = commit ? ctrls->count : i;
+ ctrls->error_idx = ioctl == VIDIOC_S_EXT_CTRLS ?
+ ctrls->count : i;
return ret;
}
}
ctrls->error_idx = 0;
- if (commit)
+ if (ioctl == VIDIOC_S_EXT_CTRLS)
return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
else
return uvc_ctrl_rollback(handle);
@@ -1123,7 +1152,7 @@ static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
- return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_S_EXT_CTRLS);
}
static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
@@ -1131,7 +1160,7 @@ static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
{
struct uvc_fh *handle = fh;
- return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_TRY_EXT_CTRLS);
}
static int uvc_ioctl_querymenu(struct file *file, void *fh,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index dc20021f7ee0..3288b118264e 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -902,6 +902,7 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
+int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);
int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control_query *xqry);
--
2.31.0.rc2.261.g7f71774620-goog
On 17/03/2021 17:45, Ricardo Ribalda wrote:
> We can figure out if reading/writing a set of controls can fail without
> accessing them by checking their flags.
>
> This way we can honor the API closer:
>
> If an error is found when validating the list of controls passed with
> VIDIOC_G_EXT_CTRLS, then error_idx shall be set to ctrls->count to
> indicate to userspace that no actual hardware was touched.
>
> Fixes v4l2-compliance:
> Control ioctls (Input 0):
> warn: v4l2-test-controls.cpp(765): g_ext_ctrls(0) invalid error_idx 0
> fail: v4l2-test-controls.cpp(645): invalid error index write only control
> test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
>
> Signed-off-by: Ricardo Ribalda <[email protected]>
> ---
> drivers/media/usb/uvc/uvc_ctrl.c | 21 +++++++++++++++++
> drivers/media/usb/uvc/uvc_v4l2.c | 39 ++++++++++++++++++++++++++++----
> drivers/media/usb/uvc/uvcvideo.h | 1 +
> 3 files changed, 56 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index 929e70dff11a..af1d4d9b8afb 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1046,6 +1046,27 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
> return 0;
> }
>
> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
accesible -> accessible
With that typo fixed you can add my:
Reviewed-by: Hans Verkuil <[email protected]>
Thanks!
Hans
> +{
> + struct uvc_control_mapping *mapping;
> + struct uvc_control *ctrl;
> +
> + if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
> + return -EACCES;
> +
> + ctrl = uvc_find_control(chain, v4l2_id, &mapping);
> + if (!ctrl)
> + return -EINVAL;
> +
> + if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read)
> + return -EACCES;
> +
> + if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
> + return -EACCES;
> +
> + return 0;
> +}
> +
> static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
> {
> const char *name;
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index ed262f61e6a6..ce55b4bff687 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -1045,6 +1045,26 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
> return 0;
> }
>
> +static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
> + struct v4l2_ext_controls *ctrls,
> + unsigned long ioctl)
> +{
> + struct v4l2_ext_control *ctrl = ctrls->controls;
> + unsigned int i;
> + int ret = 0;
> +
> + for (i = 0; i < ctrls->count; ++ctrl, ++i) {
> + ret = uvc_ctrl_is_accesible(chain, ctrl->id,
> + ioctl == VIDIOC_G_EXT_CTRLS);
> + if (ret)
> + break;
> + }
> +
> + ctrls->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : ctrls->count;
> +
> + return ret;
> +}
> +
> static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
> struct v4l2_ext_controls *ctrls)
> {
> @@ -1054,6 +1074,10 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
> unsigned int i;
> int ret;
>
> + ret = uvc_ctrl_check_access(chain, ctrls, VIDIOC_G_EXT_CTRLS);
> + if (ret < 0)
> + return ret;
> +
> if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
> for (i = 0; i < ctrls->count; ++ctrl, ++i) {
> struct v4l2_queryctrl qc = { .id = ctrl->id };
> @@ -1090,13 +1114,17 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
>
> static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
> struct v4l2_ext_controls *ctrls,
> - bool commit)
> + unsigned long ioctl)
> {
> struct v4l2_ext_control *ctrl = ctrls->controls;
> struct uvc_video_chain *chain = handle->chain;
> unsigned int i;
> int ret;
>
> + ret = uvc_ctrl_check_access(chain, ctrls, ioctl);
> + if (ret < 0)
> + return ret;
> +
> ret = uvc_ctrl_begin(chain);
> if (ret < 0)
> return ret;
> @@ -1105,14 +1133,15 @@ static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
> ret = uvc_ctrl_set(handle, ctrl);
> if (ret < 0) {
> uvc_ctrl_rollback(handle);
> - ctrls->error_idx = commit ? ctrls->count : i;
> + ctrls->error_idx = ioctl == VIDIOC_S_EXT_CTRLS ?
> + ctrls->count : i;
> return ret;
> }
> }
>
> ctrls->error_idx = 0;
>
> - if (commit)
> + if (ioctl == VIDIOC_S_EXT_CTRLS)
> return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
> else
> return uvc_ctrl_rollback(handle);
> @@ -1123,7 +1152,7 @@ static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
> {
> struct uvc_fh *handle = fh;
>
> - return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
> + return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_S_EXT_CTRLS);
> }
>
> static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
> @@ -1131,7 +1160,7 @@ static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
> {
> struct uvc_fh *handle = fh;
>
> - return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
> + return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_TRY_EXT_CTRLS);
> }
>
> static int uvc_ioctl_querymenu(struct file *file, void *fh,
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index dc20021f7ee0..3288b118264e 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -902,6 +902,7 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
>
> int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
> int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);
>
> int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
> struct uvc_xu_control_query *xqry);
>
Hi Ricardo,
On 17/03/2021 17:45, Ricardo Ribalda wrote:
> If a control is inactive return -EACCES to let the userspace know that
> the value will not be applied automatically when the control is active
> again.
>
> Signed-off-by: Ricardo Ribalda <[email protected]>
> Suggested-by: Hans Verkuil <[email protected]>
In several of the patches in this series you added 'Suggested-by' or 'Credit-to'.
Please use <[email protected]> so Cisco gets the credit as well :-)
> ---
> drivers/media/usb/uvc/uvc_ctrl.c | 73 +++++++++++++++++++++++++-------
> drivers/media/usb/uvc/uvc_v4l2.c | 11 ++++-
> drivers/media/usb/uvc/uvcvideo.h | 3 +-
> 3 files changed, 69 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index af1d4d9b8afb..26d3494b401b 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -1046,10 +1046,62 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
> return 0;
> }
>
> -int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
> +static bool uvc_ctrl_is_inactive(struct uvc_video_chain *chain,
> + struct uvc_control *ctrl,
> + struct uvc_control_mapping *mapping)
> +{
> + struct uvc_control_mapping *master_map = NULL;
> + struct uvc_control *master_ctrl = NULL;
> + s32 val;
> + int ret;
> +
> + if (!mapping->master_id)
> + return false;
> +
> + __uvc_find_control(ctrl->entity, mapping->master_id, &master_map,
> + &master_ctrl, 0);
> +
> + if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
> + return false;
> +
> + ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
> + if (ret < 0 || val == mapping->master_manual)
> + return false;
> +
> + return true;
> +}
> +
> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
Same typo: accesible -> accessible
> + unsigned long ioctl)
> {
> struct uvc_control_mapping *mapping;
> struct uvc_control *ctrl;
> + bool read, try;
> +
> + switch (ioctl) {
> + case VIDIOC_G_EXT_CTRLS:
> + read = true;
> + try = false;
> + break;
> + case VIDIOC_S_EXT_CTRLS:
> + read = false;
> + try = false;
> + break;
> + case VIDIOC_TRY_EXT_CTRLS:
> + read = false;
> + try = true;
> + break;
> + case VIDIOC_G_CTRL:
> + read = true;
> + try = false;
> + break;
> + case VIDIOC_S_CTRL:
> + read = false;
> + try = false;
> + break;
> + default:
> + return -EINVAL;
> + }
That's ugly. Just remove the bools and switch and just check the ioctl below...
>
> if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
> return -EACCES;
> @@ -1064,6 +1116,9 @@ int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
> if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
> return -EACCES;
>
> + if (!read && !try && uvc_ctrl_is_inactive(chain, ctrl, mapping))
and this becomes:
if ((ioctl == VIDIOC_S_EXT_CTRLS || ioctl == VIDIOC_S_CTRL) &&
uvc_ctrl_is_inactive(chain, ctrl, mapping))
Much, much simpler!
> + return -EACCES;
> +
> return 0;
> }
>
> @@ -1086,8 +1141,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> struct uvc_control_mapping *mapping,
> struct v4l2_queryctrl *v4l2_ctrl)
> {
> - struct uvc_control_mapping *master_map = NULL;
> - struct uvc_control *master_ctrl = NULL;
> const struct uvc_menu_info *menu;
> unsigned int i;
>
> @@ -1103,18 +1156,8 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
> if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
> v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>
> - if (mapping->master_id)
> - __uvc_find_control(ctrl->entity, mapping->master_id,
> - &master_map, &master_ctrl, 0);
> - if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) {
> - s32 val;
> - int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
> - if (ret < 0)
> - return ret;
> -
> - if (val != mapping->master_manual)
> - v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
> - }
> + if (uvc_ctrl_is_inactive(chain, ctrl, mapping))
> + v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
>
> if (!ctrl->cached) {
> int ret = uvc_ctrl_populate_cache(chain, ctrl);
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index ce55b4bff687..8e9051a245c7 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -999,6 +999,10 @@ static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
> struct v4l2_ext_control xctrl;
> int ret;
>
> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_G_CTRL);
> + if (ret)
> + return ret;
> +
> memset(&xctrl, 0, sizeof(xctrl));
> xctrl.id = ctrl->id;
>
> @@ -1023,6 +1027,10 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
> struct v4l2_ext_control xctrl;
> int ret;
>
> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_S_CTRL);
> + if (ret)
> + return ret;
> +
> memset(&xctrl, 0, sizeof(xctrl));
> xctrl.id = ctrl->id;
> xctrl.value = ctrl->value;
> @@ -1054,8 +1062,7 @@ static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
> int ret = 0;
>
> for (i = 0; i < ctrls->count; ++ctrl, ++i) {
> - ret = uvc_ctrl_is_accesible(chain, ctrl->id,
> - ioctl == VIDIOC_G_EXT_CTRLS);
> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, ioctl);
> if (ret)
> break;
> }
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index 3288b118264e..4e86d0983d58 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -902,7 +902,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
>
> int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
> int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
> -int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);
> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
> + unsigned long ioctl);
>
> int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
> struct uvc_xu_control_query *xqry);
>
Regards,
Hans
On 18/03/2021 08:39, Hans Verkuil wrote:
> Hi Ricardo,
>
> On 17/03/2021 17:45, Ricardo Ribalda wrote:
>> If a control is inactive return -EACCES to let the userspace know that
>> the value will not be applied automatically when the control is active
>> again.
Note that this needs to be documented in vidioc-g-ext-ctrls.rst and
vidioc-g-ctrl.rst as well. Currently setting inactive controls shouldn't
return EACCES, but this has now changed.
Regards,
Hans
>>
>> Signed-off-by: Ricardo Ribalda <[email protected]>
>> Suggested-by: Hans Verkuil <[email protected]>
>
> In several of the patches in this series you added 'Suggested-by' or 'Credit-to'.
> Please use <[email protected]> so Cisco gets the credit as well :-)
>
>> ---
>> drivers/media/usb/uvc/uvc_ctrl.c | 73 +++++++++++++++++++++++++-------
>> drivers/media/usb/uvc/uvc_v4l2.c | 11 ++++-
>> drivers/media/usb/uvc/uvcvideo.h | 3 +-
>> 3 files changed, 69 insertions(+), 18 deletions(-)
>>
>> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
>> index af1d4d9b8afb..26d3494b401b 100644
>> --- a/drivers/media/usb/uvc/uvc_ctrl.c
>> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
>> @@ -1046,10 +1046,62 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
>> return 0;
>> }
>>
>> -int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
>> +static bool uvc_ctrl_is_inactive(struct uvc_video_chain *chain,
>> + struct uvc_control *ctrl,
>> + struct uvc_control_mapping *mapping)
>> +{
>> + struct uvc_control_mapping *master_map = NULL;
>> + struct uvc_control *master_ctrl = NULL;
>> + s32 val;
>> + int ret;
>> +
>> + if (!mapping->master_id)
>> + return false;
>> +
>> + __uvc_find_control(ctrl->entity, mapping->master_id, &master_map,
>> + &master_ctrl, 0);
>> +
>> + if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
>> + return false;
>> +
>> + ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
>> + if (ret < 0 || val == mapping->master_manual)
>> + return false;
>> +
>> + return true;
>> +}
>> +
>> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
>
> Same typo: accesible -> accessible
>
>> + unsigned long ioctl)
>> {
>> struct uvc_control_mapping *mapping;
>> struct uvc_control *ctrl;
>> + bool read, try;
>> +
>> + switch (ioctl) {
>> + case VIDIOC_G_EXT_CTRLS:
>> + read = true;
>> + try = false;
>> + break;
>> + case VIDIOC_S_EXT_CTRLS:
>> + read = false;
>> + try = false;
>> + break;
>> + case VIDIOC_TRY_EXT_CTRLS:
>> + read = false;
>> + try = true;
>> + break;
>> + case VIDIOC_G_CTRL:
>> + read = true;
>> + try = false;
>> + break;
>> + case VIDIOC_S_CTRL:
>> + read = false;
>> + try = false;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>
> That's ugly. Just remove the bools and switch and just check the ioctl below...
>
>>
>> if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
>> return -EACCES;
>> @@ -1064,6 +1116,9 @@ int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read)
>> if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
>> return -EACCES;
>>
>> + if (!read && !try && uvc_ctrl_is_inactive(chain, ctrl, mapping))
>
> and this becomes:
>
> if ((ioctl == VIDIOC_S_EXT_CTRLS || ioctl == VIDIOC_S_CTRL) &&
> uvc_ctrl_is_inactive(chain, ctrl, mapping))
>
> Much, much simpler!
>
>> + return -EACCES;
>> +
>> return 0;
>> }
>>
>> @@ -1086,8 +1141,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
>> struct uvc_control_mapping *mapping,
>> struct v4l2_queryctrl *v4l2_ctrl)
>> {
>> - struct uvc_control_mapping *master_map = NULL;
>> - struct uvc_control *master_ctrl = NULL;
>> const struct uvc_menu_info *menu;
>> unsigned int i;
>>
>> @@ -1103,18 +1156,8 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
>> if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
>> v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
>>
>> - if (mapping->master_id)
>> - __uvc_find_control(ctrl->entity, mapping->master_id,
>> - &master_map, &master_ctrl, 0);
>> - if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) {
>> - s32 val;
>> - int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
>> - if (ret < 0)
>> - return ret;
>> -
>> - if (val != mapping->master_manual)
>> - v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
>> - }
>> + if (uvc_ctrl_is_inactive(chain, ctrl, mapping))
>> + v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
>>
>> if (!ctrl->cached) {
>> int ret = uvc_ctrl_populate_cache(chain, ctrl);
>> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
>> index ce55b4bff687..8e9051a245c7 100644
>> --- a/drivers/media/usb/uvc/uvc_v4l2.c
>> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
>> @@ -999,6 +999,10 @@ static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
>> struct v4l2_ext_control xctrl;
>> int ret;
>>
>> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_G_CTRL);
>> + if (ret)
>> + return ret;
>> +
>> memset(&xctrl, 0, sizeof(xctrl));
>> xctrl.id = ctrl->id;
>>
>> @@ -1023,6 +1027,10 @@ static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
>> struct v4l2_ext_control xctrl;
>> int ret;
>>
>> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, VIDIOC_S_CTRL);
>> + if (ret)
>> + return ret;
>> +
>> memset(&xctrl, 0, sizeof(xctrl));
>> xctrl.id = ctrl->id;
>> xctrl.value = ctrl->value;
>> @@ -1054,8 +1062,7 @@ static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
>> int ret = 0;
>>
>> for (i = 0; i < ctrls->count; ++ctrl, ++i) {
>> - ret = uvc_ctrl_is_accesible(chain, ctrl->id,
>> - ioctl == VIDIOC_G_EXT_CTRLS);
>> + ret = uvc_ctrl_is_accesible(chain, ctrl->id, ioctl);
>> if (ret)
>> break;
>> }
>> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
>> index 3288b118264e..4e86d0983d58 100644
>> --- a/drivers/media/usb/uvc/uvcvideo.h
>> +++ b/drivers/media/usb/uvc/uvcvideo.h
>> @@ -902,7 +902,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
>>
>> int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
>> int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
>> -int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id, bool read);
>> +int uvc_ctrl_is_accesible(struct uvc_video_chain *chain, u32 v4l2_id,
>> + unsigned long ioctl);
>>
>> int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
>> struct uvc_xu_control_query *xqry);
>>
>
> Regards,
>
> Hans
>
On 17/03/2021 17:44, Ricardo Ribalda wrote:
> v4l2-compliance -m /dev/media0 -a -f
> Total for uvcvideo device /dev/media0: 8, Succeeded: 6, Failed: 2, Warnings: 0
> Total for uvcvideo device /dev/video0: 54, Succeeded: 50, Failed: 4, Warnings: 2
> Total for uvcvideo device /dev/video1: 46, Succeeded: 46, Failed: 0, Warnings: 0
> Grand Total for uvcvideo device /dev/media0: 108, Succeeded: 102,
> Failed: 6, Warnings: 2
>
> After fixing all of them we go down to:
>
> Total for uvcvideo device /dev/media0: 8, Succeeded: 8, Failed: 0, Warnings: 0
> Total for uvcvideo device /dev/video0: 54, Succeeded: 54, Failed: 0, Warnings: 0
> Total for uvcvideo device /dev/video1: 46, Succeeded: 46, Failed: 0, Warnings: 0
> Grand Total for uvcvideo device /dev/media0: 108, Succeeded: 108,
> Failed: 0, Warnings: 0
>
> YES, NO MORE WARNINGS :)
>
> Note that we depend on:
> https://patchwork.linuxtv.org/project/linux-media/patch/[email protected]/
>
> With Hans patch we can also pass v4l2-compliance -s.
There is one remaining issue: if uvc_ioctl_s_try_ext_ctrls() calls uvc_ctrl_commit
and the 'commit' fails for a certain control, then you want error_idx to be the
index of the failing control. This is obviously something that v4l2-compliance cannot
test since it would rely on a buggy uvc HW implementation. But I can test it by
dropping patch 16/17: that should force the commit to fail and then I can verify
error_idx.
Regards,
Hans
>
> Changelog from v5 (Thanks to Hans)
> - Move more checks to framework
> - Rewrite the framework check_ext_ctrls
> - Rewrite ctrl_is_inactive
> - Add function ctrl_is_accessible
> - Use ioctl name instead of boolean values
>
> Hans Verkuil (1):
> uvc: use vb2 ioctl and fop helpers
>
> Ricardo Ribalda (16):
> media: v4l2-ioctl: check_ext_ctrls: Fix multiclass
> V4L2_CTRL_WHICH_DEF_VAL
> media: v4l2-ioctl: check_ext_ctrls: Return -EINVAL on
> V4L2_CTRL_WHICH_REQUEST_VAL
> media: v4l2-ioctl: check_ext_ctrls: Return the right error_idx
> media: v4l2-ioctl: check_ext_ctrls: Fix V4L2_CTRL_WHICH_DEF_VAL
> media: pvrusb2: Do not check for V4L2_CTRL_WHICH_DEF_VAL
> media: uvcvideo: Do not check for V4L2_CTRL_WHICH_DEF_VAL
> media: uvcvideo: Set capability in s_param
> media: uvcvideo: Return -EIO for control errors
> media: uvcvideo: refactor __uvc_ctrl_add_mapping
> media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS
> media: uvcvideo: Use dev->name for querycap()
> media: uvcvideo: Set unique vdev name based in type
> media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE
> media: uvcvideo: Use control names from framework
> media: uvcvideo: Check controls flags before accessing them
> media: uvcvideo: Return -EACCES to inactive controls
>
> drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | 4 -
> drivers/media/usb/uvc/uvc_ctrl.c | 284 ++++++++++++++----
> drivers/media/usb/uvc/uvc_driver.c | 22 +-
> drivers/media/usb/uvc/uvc_metadata.c | 8 +-
> drivers/media/usb/uvc/uvc_queue.c | 143 ---------
> drivers/media/usb/uvc/uvc_v4l2.c | 352 +++++------------------
> drivers/media/usb/uvc/uvc_video.c | 13 +-
> drivers/media/usb/uvc/uvcvideo.h | 43 +--
> drivers/media/v4l2-core/v4l2-ioctl.c | 59 ++--
> 9 files changed, 366 insertions(+), 562 deletions(-)
>