Added new logging backend - for spinel protocol #2

kkasperczyk-no · 2020-06-15T12:51:21Z

No description provided.

lmaciejonczyk

LGTM

subsys/logging/Kconfig

subsys/logging/log_backend_spinel.c

MarekPorwisz

I think I found some issue - or I am missing something

MarekPorwisz · 2020-06-22T09:58:21Z

subsys/logging/log_backend_spinel.c

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2018 Nordic Semiconductor ASA


fix copyright

MarekPorwisz · 2020-06-22T09:59:27Z

subsys/logging/log_backend_spinel.c

+#define CONFIG_LOG_BACKEND_SPINEL_BUFFER_SIZE 0
+#endif
+
+static u8_t char_buf[CONFIG_LOG_BACKEND_SPINEL_BUFFER_SIZE];


I think you need to upmerge. Zephyr var types were removed. use stdint instead

MarekPorwisz · 2020-06-22T10:04:20Z

subsys/logging/log_backend_spinel.c

+}
+
+static void sync_string(const struct log_backend *const backend,
+		     struct log_msg_ids src_level, u32_t timestamp,


Not sure if alignment is wrong here or is it just github display issue

MarekPorwisz · 2020-06-22T10:05:29Z

subsys/logging/log_backend_spinel.c

+static void put(const struct log_backend *const backend,
+		struct log_msg *msg)
+{
+	// prevent adding CRLF, which may crash spinel decoding


run the checkpatch script on the files. I'm not sure c++ comments are allowed

I did and there were no errors, but as Łukasz Maciejończyk wrote it is not allowed, so was fixed.

MarekPorwisz · 2020-06-22T10:11:08Z

subsys/logging/log_backend_spinel.c

+	log_backend_std_dropped(&log_output, cnt);
+}
+
+__attribute__((weak)) void otPlatLog(int aLogLevel, int aLogRegion,


I'm afraid of this;) But leave it for now.

Why do we need a weak definition in the first place?

I did this, because I couldn't find clear way to include logging.h file, where otPlatLog method declaration is located. Moreover I thought that I shouldn't provide OpenThread specific includes inside very general Zephyr logging directory.

I don't see an issue with introducing a header if we aleady use an OT function in the file, if that's the case. I also don't see why shouldn't it work (for instance logging.c use this header).

Nonetheless, I still don't quite understand why a weak definition is provided here instead of a function declaration:
void otPlatLog(int aLogLevel, int aLogRegion, const char *aFormat, ...);
(which would not be needed if the header was provided).

Hmm I did, as you said and it works. I'm not sure why I was having a problems. Probably I had some weird state because I messed up something in include paths or maybe switching between branches. Still have to learn project structure and using git...

MarekPorwisz · 2020-06-22T10:16:23Z

subsys/net/lib/openthread/platform/logging.c

@@ -44,7 +49,6 @@ void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion,
 	case OT_LOG_LEVEL_WARN:
 		LOG_WRN("%s", log_strdup(logString));
 		break;
-	case OT_LOG_LEVEL_NOTE:


why was OT_LOG_LEVEL_NOTE removed?

Actually both changes are not mine and I don't know how they get there. I think that I did something wrong during cherry picking of file revision, but it is fixed now

MarekPorwisz · 2020-06-22T10:19:51Z

subsys/net/lib/openthread/platform/logging.c

@@ -19,13 +19,18 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);

 #define LOG_PARSE_BUFFER_SIZE  128

+#ifndef OPENTHREAD_CONFIG_LOG_OUTPUT
+#define OPENTHREAD_CONFIG_LOG_OUTPUT CONFIG_LOG_OUTPUT


What is it used for? Cant find any use of it in the file.

It is used to provide (or not) implementation of otPlatLog method by Zephyr. If we want to use Spinel backend such implementation has to be turned off, because it is already provided by ncp_base.cpp file in ncp component and multiple definition error occur.

MarekPorwisz · 2020-06-22T10:22:58Z

subsys/logging/Kconfig

@@ -44,6 +44,19 @@ config LOG_DEFAULT_LEVEL
 	  - 3 INFO, default to write LOG_LEVEL_INFO
 	  - 4 DEBUG, default to write LOG_LEVEL_DBG

+config LOG_OUTPUT


How is that used? Is it some macro magic? Can't find any usage of it except the one unused macro.

subsys/logging/log_backend_spinel.c

MarekPorwisz · 2020-06-22T11:28:35Z

subsys/logging/Kconfig

@@ -424,6 +437,41 @@ config LOG_BACKEND_RTT_FORCE_PRINTK

 endif # LOG_BACKEND_RTT

+if LOG_BACKEND_SPINEL


does that work? the if is above it's symbol definition.

No it's not. I miss clicked and it worked for me probably thanks for cmake cache. Fixed

subsys/logging/Kconfig

MarekPorwisz · 2020-06-22T11:29:48Z

subsys/logging/Kconfig

+	help
+	  Sets log level
+
+	  - 0 NONE


this could also be converted to options

rlubos

Looks pretty ok for me, you might consider requesting a review from @nordic-krch before going upstream, he's our logging subsystem expert. He'll review it eventually anyway.

rlubos · 2020-06-23T12:14:49Z

subsys/net/lib/openthread/platform/logging.c

@@ -19,6 +19,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);

 #define LOG_PARSE_BUFFER_SIZE  128

+#if !CONFIG_LOG_BACKEND_SPINEL


I think it would be cleaner to disable logging.c build at the CMake level (make it conditional with zephyr_library_sources_ifndef), there's really no point building this file in this case.

Very smart way. I find it really useful to remember :) Done

rlubos · 2020-06-23T12:15:19Z

subsys/logging/Kconfig

+config LOG_BACKEND_SPINEL
+	bool "Enable Spinel protocol backend"
+	depends on !LOG_BACKEND_UART
+	default n


No need for default n.

rlubos · 2020-06-23T12:16:46Z

subsys/logging/Kconfig

@@ -424,6 +424,51 @@ config LOG_BACKEND_RTT_FORCE_PRINTK

 endif # LOG_BACKEND_RTT

+config LOG_BACKEND_SPINEL
+	bool "Enable Spinel protocol backend"


I'd mention here that this backend is dedicated to use with OpenThread, it might be not clear what Spinnel actually is. Here or in the help message.

rlubos · 2020-06-23T12:17:16Z

subsys/logging/Kconfig

@@ -424,6 +424,51 @@ config LOG_BACKEND_RTT_FORCE_PRINTK

 endif # LOG_BACKEND_RTT

+config LOG_BACKEND_SPINEL
+	bool "Enable Spinel protocol backend"
+	depends on !LOG_BACKEND_UART


I think we shall also add dependency to OpenThread (NET_L2_OPENTHREAD).

depends on !LOG_BACKEND_UART
isn't it possible to have spinel on different UART and console/log on another?

Yes it is. I changed dependency to turn on Spinel backend only if UART backend is disabled or is enabled on another UART device than spinel. Is it ok now? I did some tests, using both backends at once and it seems to work properly.

rlubos · 2020-06-23T12:24:25Z

subsys/logging/log_backend_spinel.c

+	log_backend_std_dropped(&log_output, cnt);
+}
+
+__attribute__((weak)) void otPlatLog(int aLogLevel, int aLogRegion,


Why do we need a weak definition in the first place?

nordic-krch · 2020-06-24T06:47:02Z

subsys/logging/Kconfig

@@ -424,6 +424,51 @@ config LOG_BACKEND_RTT_FORCE_PRINTK

 endif # LOG_BACKEND_RTT

+config LOG_BACKEND_SPINEL
+	bool "Enable Spinel protocol backend"
+	depends on !LOG_BACKEND_UART


depends on !LOG_BACKEND_UART
isn't it possible to have spinel on different UART and console/log on another?

nordic-krch · 2020-06-24T06:48:43Z

subsys/logging/log_backend_spinel.c

+	const int log_region_platform = 12;
+
+	otPlatLog(CONFIG_LOG_BACKEND_SPINEL_LEVEL, log_region_platform,
+	"%s", data);


please improve indentation

Done. Can you tell me where to find some indentation rules? As I can see in other files done by Nordic, when breaking line of method arguments, number of tabs is quite different. Sometimes its 1 tab, another 3 or 4.

https://docs.zephyrproject.org/latest/contribute/index.html#coding-style
https://www.kernel.org/doc/html/latest/process/coding-style.html

Not sure it is written there, but when you break line on function params you just align to the first parameter unless it is not possible

nordic-krch · 2020-06-24T06:51:16Z

subsys/logging/log_backend_spinel.c

+	/* assuming SPINEL backend logs as platform region */
+	const int log_region_platform = 12;
+
+	otPlatLog(CONFIG_LOG_BACKEND_SPINEL_LEVEL, log_region_platform,


i see that you don't do any reconfiguration when panic is called. Can otPlatLog be called from isr and is it synchronous? when system enters panic mode, it is expected that all log operations becomes synchronous without any context switching.

It is fixed, please take a look at this. It was decided to add synchronous UART transmission in the Zephyr ot platform uart.c file, as it wasn't implemented. OT in its assumption doesn't use otPlatLog method from the isr, so it doesn't make a problem. Zephyr may do that and otPlatLog for NCP cannot be called from isr, so that's why after consultation with Łukasz Duda, we decided to put raw bytes without encoding on the interface in the panic mode.

konradderda

Nice contribution, I have left few comments

konradderda · 2020-06-30T06:45:18Z

subsys/logging/log_backend_spinel.c

+static int write(uint8_t *data, size_t length, void *ctx)
+{
+	/* assuming SPINEL backend logs as platform region */
+	const int log_region_platform = 12;


How about using OT_LOG_REGION_PLATFORM enum value?

konradderda · 2020-06-30T06:47:44Z

subsys/logging/log_backend_spinel.c

+		 * cannot be used, because it cannot be called from interrupt.
+		 * In such situation raw data bytes without encoding are send. 
+		 */
+		otPlatUartSetPanicMode();


uart panic function should be called once in panic() body

konradderda · 2020-06-30T06:48:16Z

subsys/logging/log_backend_spinel.c

+}
+
+static void panic(struct log_backend const *const backend)
+{


wrap every unused argument with ARG_UNUSED()

konradderda · 2020-06-30T06:51:49Z

subsys/net/lib/openthread/platform/uart.c

@@ -208,7 +210,14 @@ otError otPlatUartSend(const u8_t *aBuf, u16_t aBufLength)
 	size_t cnt = ring_buf_put(ot_uart.tx_ringbuf, aBuf, aBufLength);

 	if (atomic_set(&(ot_uart.tx_busy), 1) == 0) {
-		uart_irq_tx_enable(ot_uart.dev);
+		if(is_panic_mode){
+			/* In panic mode all data have to be send imidiatelly


'immediately' typo

konradderda · 2020-06-30T06:53:25Z

subsys/net/lib/openthread/platform/uart.c

@@ -208,7 +210,14 @@ otError otPlatUartSend(const u8_t *aBuf, u16_t aBufLength)
 	size_t cnt = ring_buf_put(ot_uart.tx_ringbuf, aBuf, aBufLength);

 	if (atomic_set(&(ot_uart.tx_busy), 1) == 0) {
-		uart_irq_tx_enable(ot_uart.dev);
+		if(is_panic_mode){


fix spaces in this block - space after if, before bracket and after 'else'

konradderda · 2020-06-30T06:57:09Z

subsys/net/lib/openthread/platform/uart.c

+	return result;
+}
+
+void otPlatUartSetPanicMode(void)


instead of creating OT-like function let's create Zephyr - specific function like platformUartProcess(), e.g. platformUartPanic(), it's declaration can be added to zephyr/subsys/net/lib/openthread/platform/platform-zephyr.h

konradderda · 2020-06-30T06:57:39Z

subsys/logging/log_backend_spinel.c

+	/* assuming SPINEL backend logs as platform region */
+	const int log_region_platform = 12;
+
+	if(is_panic_mode()){


fix spaces in this block - space after if, before bracket and after 'else'

rlubos · 2020-06-30T13:51:14Z

subsys/net/lib/openthread/platform/uart.c

+	const u8_t *data;
+	otError result = OT_ERROR_NONE;
+
+	len = ring_buf_get_claim(ot_uart.tx_ringbuf, (u8_t **)&data,


Not exactly my area of expertise, but shouldn't we call ring_buf_get_finish after we process the data? In the API docs we have:

Once data is processed it can be freed using @ref ring_buf_get_finish.

Also, shouldn't we call this in a loop until ring_buf_is_empty() returns true in order to fully flush the buffer? IIUC ring_buf_get_claim returns the largest continuous buffer it can, but it isn't necessarily all of the data available in the buffer (in case the data wraps). At least, that's what documentation suggests (and brief look into the code confirms that):

@return Number of valid bytes in the provided buffer which can be smaller than requested if there is not enough free space or buffer wraps.

According to documentation, you are right about the need to free space and call claim operation in loop. So I implemented do while() loop, which should solve the problem, please verify it. If it comes to usage the ring_buf_is_empty() method, it leads to lock in infinite loop, as buffer is not empty even when ring_buf_get_claim() can't get anything from it and returns 0 bytes every time. I'm not sure why is it happening, so I look to the ring buffer tests, where buffer empty is checked by trying to claim something and getting 0 bytes in result and ring_buf_is_empty() is not used for that. I thought about leaving it implemented this way, as it is compatible with tests, but also to contact with verification team to ask about this problem. Is this ok?

If it is so, then indeed it seems something fishy is going on with ring_buf_is_empty() function, probably worth an Zephyr issue to create. Nonetheless, current solution looks fine to me.

rlubos · 2020-06-30T13:52:43Z

subsys/logging/log_backend_spinel.c

+static int write(uint8_t *data, size_t length, void *ctx);
+
+LOG_OUTPUT_DEFINE(log_output, write,
+		  char_buf, sizeof(char_buf));


nit: Do we need to break the line here, I guess it should all fit into a single line?

MarekPorwisz

alignment seems to be off in some places.

MarekPorwisz · 2020-07-01T07:24:09Z

subsys/logging/log_backend_spinel.c

+	memset(char_buf, '\0', sizeof(char_buf));
+}
+
+static void panic(struct log_backend const *const backend)


Question: Shouldn't panic function flush the uart automatically?

rlubos · 2020-07-02T09:28:28Z

subsys/net/lib/openthread/platform/uart.c

+
+	do {
+		len = ring_buf_get_claim(ot_uart.tx_ringbuf, (u8_t **)&data,
+				 ot_uart.tx_ringbuf->size);


nit: alignment

rlubos · 2020-07-02T09:29:31Z

It seems something went wrong with the reabase (I guess?), there are commits in here that should not be.

kkasperczyk-no · 2020-07-02T09:42:19Z

Yes, I accidentally pushed also not mine commits. It is fixed now.

New logging backend that can be used by NCP architecture. Signed-off-by: Kamil Kasperczyk <[email protected]>

This makes the gatt metrics also available for gatt write-without-rsp-cb so it now prints the rate of each write: uart:~$ gatt write-without-response-cb 1e ff 10 10 Write #1: 16 bytes (0 bps) Write #2: 32 bytes (3445948416 bps) Write #3: 48 bytes (2596929536 bps) Write #4: 64 bytes (6400 bps) Write #5: 80 bytes (8533 bps) Write #6: 96 bytes (10666 bps) Write #7: 112 bytes (8533 bps) Write #8: 128 bytes (9955 bps) Write zephyrproject-rtos#9: 144 bytes (11377 bps) Write zephyrproject-rtos#10: 160 bytes (7680 bps) Write zephyrproject-rtos#11: 176 bytes (8533 bps) Write zephyrproject-rtos#12: 192 bytes (9386 bps) Write Complete (err 0) Write zephyrproject-rtos#13: 208 bytes (8533 bps) Write zephyrproject-rtos#14: 224 bytes (9244 bps) Write zephyrproject-rtos#15: 240 bytes (9955 bps) Write zephyrproject-rtos#16: 256 bytes (8000 bps) Signed-off-by: Luiz Augusto von Dentz <[email protected]>

The _ldiv5() is an optimized divide-by-5 function that is smaller and faster than the generic libgcc implementation. Yet it can be made even smaller and faster with this replacement implementation based on a reciprocal multiplication plus some tricks. For example, here's the assembly from the original code on ARM: _ldiv5: ldr r3, [r0] movw ip, zephyrproject-rtos#52429 ldr r1, [r0, #4] movt ip, 52428 adds r3, r3, #2 push {r4, r5, r6, r7, lr} mov lr, #0 adc r1, r1, lr adds r2, lr, lr umull r7, r6, ip, r1 lsr r6, r6, #2 adc r7, r6, r6 adds r2, r2, r2 adc r7, r7, r7 adds r2, r2, lr adc r7, r7, r6 subs r3, r3, r2 sbc r7, r1, r7 lsr r2, r3, #3 orr r2, r2, r7, lsl zephyrproject-rtos#29 umull r2, r1, ip, r2 lsr r2, r1, #2 lsr r7, r1, zephyrproject-rtos#31 lsl r1, r2, #3 adds r4, lr, r1 adc r5, r6, r7 adds r2, r1, r1 adds r2, r2, r2 adds r2, r2, r1 subs r2, r3, r2 umull r3, r2, ip, r2 lsr r2, r2, #2 adds r4, r4, r2 adc r5, r5, #0 strd r4, [r0] pop {r4, r5, r6, r7, pc} And here's the resulting assembly with this commit applied: _ldiv5: push {r4, r5, r6, r7} movw r4, zephyrproject-rtos#13107 ldr r6, [r0] movt r4, 13107 ldr r1, [r0, #4] mov r3, #0 umull r6, r7, r6, r4 add r2, r4, r4, lsl #1 umull r4, r5, r1, r4 adds r1, r6, r2 adc r2, r7, r2 adds ip, r6, r4 adc r1, r7, r5 adds r2, ip, r2 adc r2, r1, r3 adds r2, r4, r2 adc r3, r5, r3 strd r2, [r0] pop {r4, r5, r6, r7} bx lr So we're down to 20 instructions from 36 initially, with only 2 umull instructions instead of 3, and slightly smaller stack footprint. Signed-off-by: Nicolas Pitre <[email protected]>

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logging: Added new logging backend - Spinel protocol

ea75dae

New logging backend that can be used by NCP architecture. Signed-off-by: Kamil Kasperczyk <[email protected]>

kkasperczyk-no force-pushed the spinel_backend_internal branch from d8f7210 to ea75dae Compare July 2, 2020 10:36

github-actions bot added the area: Networking label Jul 28, 2020

konradderda removed their request for review October 9, 2023 11:33

		@@ -0,0 +1,103 @@
		/*
		* Copyright (c) 2018 Nordic Semiconductor ASA

		@@ -424,6 +437,41 @@ config LOG_BACKEND_RTT_FORCE_PRINTK

		endif # LOG_BACKEND_RTT

		if LOG_BACKEND_SPINEL

		@@ -19,6 +19,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);

		#define LOG_PARSE_BUFFER_SIZE 128

		#if !CONFIG_LOG_BACKEND_SPINEL

Added new logging backend - for spinel protocol #2

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Added new logging backend - for spinel protocol #2

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kkasperczyk-no commented Jun 15, 2020

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rlubos commented Jul 2, 2020

kkasperczyk-no commented Jul 2, 2020

rlubos Jun 23, 2020 •

edited

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