kernel/linux.git/drivers/usb/dwc3/debug.h, branch v5.10.257

usb: dwc3: debugfs: Add and remove endpoint dirs dynamically

2021-06-23T12:42:54+00:00

commit 8d396bb0a5b62b326f6be7594d8bd46b088296bd upstream. The DWC3 DebugFS directory and files are currently created once during probe. This includes creation of subdirectories for each of the gadget's endpoints. This works fine for peripheral-only controllers, as dwc3_core_init_mode() calls dwc3_gadget_init() just prior to calling dwc3_debugfs_init(). However, for dual-role controllers, dwc3_core_init_mode() will instead call dwc3_drd_init() which is problematic in a few ways. First, the initial state must be determined, then dwc3_set_mode() will have to schedule drd_work and by then dwc3_debugfs_init() could have already been invoked. Even if the initial mode is peripheral, dwc3_gadget_init() happens after the DebugFS files are created, and worse so if the initial state is host and the controller switches to peripheral much later. And secondly, even if the gadget endpoints' debug entries were successfully created, if the controller exits peripheral mode, its dwc3_eps are freed so the debug files would now hold stale references. So it is best if the DebugFS endpoint entries are created and removed dynamically at the same time the underlying dwc3_eps are. Do this by calling dwc3_debugfs_create_endpoint_dir() as each endpoint is created, and conversely remove the DebugFS entry when the endpoint is freed. Fixes: 41ce1456e1db ("usb: dwc3: core: make dwc3_set_mode() work properly") Cc: stable Reviewed-by: Peter Chen Signed-off-by: Jack Pham Link: https://lore.kernel.org/r/20210529192932.22912-1-jackp@codeaurora.org Signed-off-by: Greg Kroah-Hartman

usb: dwc3: debug: fix checkpatch warning

2020-10-02T06:43:35+00:00

no functional changes Signed-off-by: Felipe Balbi

usb: dwc3: debug: fix sparse warning

2020-10-02T06:43:35+00:00

Fix the following sparse warning: drivers/usb/dwc3/trace.c: note: in included file (through drivers/usb/dwc3/trace.h): drivers/usb/dwc3/debug.h:374:39: warning: cast to non-scalar Signed-off-by: Felipe Balbi

usb: dwc3: Replace HTTP links with HTTPS ones

2020-07-15T14:33:51+00:00

Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov Link: https://lore.kernel.org/r/20200711135804.19735-1-grandmaster@al2klimov.de Signed-off-by: Greg Kroah-Hartman

usb: dwc3: gadget: Handle stream transfers

2020-05-25T08:09:42+00:00

Overview of stream transfer requirement: * A transfer will have a set of TRBs of the same stream ID. * A transfer is started with a stream ID in START_TRANSFER command. * A new stream will only start when the previous completes. Overview of stream events: * A "prime" from host indicates that its endpoints are active (buffers prepared and ready to receive/transmit data). The controller automatically initiates stream if it sees this. * A "NoStream" rejection event indicates that the host isn't ready. Host will put the endpoint back to idle state. Device may need to reinitiate the stream to start transfer again. * A Stream Found event means host accepted device initiated stream. Nothing needs to be done from driver. To initiate a stream, the driver will issue START_TRANSFER command with a stream ID. To reinitiate the stream, the driver must issue END_TRANSFER and restart the transfer with START_TRANSFER command with the same stream ID. This implementation handles device-initated streams (e.g. UASP driver). It also handles some hosts' quirky behavior where they only prime each endpoint once. Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi

USB: dwc3: Use the correct style for SPDX License Identifier

2020-05-05T07:58:49+00:00

This patch corrects the SPDX License Identifier style in header files related to DesignWare USB3 DRD Core Support. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches Signed-off-by: Nishad Kamdar Signed-off-by: Felipe Balbi

usb: dwc3: debug: fix string position formatting mixup with ret and len

2020-02-10T19:13:50+00:00

Currently the string formatting is mixing up the offset of ret and len. Re-work the code to use just len, remove ret and use scnprintf instead of snprintf and len position accumulation where required. Remove the -ve return check since scnprintf never returns a failure -ve size. Also break overly long lines to clean up checkpatch warnings. Addresses-Coverity: ("Unused value") Fixes: 1381a5113caf ("usb: dwc3: debug: purge usage of strcat") Signed-off-by: Colin Ian King Reviewed-by: Dan Carpenter Cc: stable Link: https://lore.kernel.org/r/20200210095139.328711-1-colin.king@canonical.com Signed-off-by: Greg Kroah-Hartman

usb: dwc3: debug: Remove newline printout

2019-10-23T06:25:08+00:00

The newline from the unknown link state tracepoint doesn't follow the other tracepoints, and it looks unsightly. Let's remove it. Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi

usb: common: Separated decoding functions from dwc3 driver.

2019-08-29T07:52:27+00:00

Patch moves some decoding functions from driver/usb/dwc3/debug.h driver to driver/usb/common/debug.c file. These moved functions include: dwc3_decode_get_status dwc3_decode_set_clear_feature dwc3_decode_set_address dwc3_decode_get_set_descriptor dwc3_decode_get_configuration dwc3_decode_set_configuration dwc3_decode_get_intf dwc3_decode_set_intf dwc3_decode_synch_frame dwc3_decode_set_sel dwc3_decode_set_isoch_delay dwc3_decode_ctrl These functions are used also in inroduced cdns3 driver. All functions prefixes were changed from dwc3 to usb. Also, function's parameters has been extended according to the name of fields in standard SETUP packet. Additionally, patch adds usb_decode_ctrl function to include/linux/usb/ch9.h file. Signed-off-by: Pawel Laszczak Signed-off-by: Felipe Balbi

usb: dwc3: debug: Print GET_STATUS(device) tracepoint

2019-05-03T06:13:49+00:00

DWC3 is missing the printing of control request GET_STATUS(device) tracepoint. This patch prints that. Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi