drivers/gpu/drm/nouveau/nvkm/core/option.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/core/option.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/core/option.c
Extension
.c
Size
3590 bytes
Lines
140
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (optstr[len]) {
		case '=':
			if (!strncasecmpz(optstr, opt, len)) {
				optstr += len + 1;
				*arglen = strcspn(optstr, ",=");
				return *arglen ? optstr : NULL;
			}
			optstr++;
			break;
		case ',':
			optstr++;
			break;
		default:
			break;
		}
		optstr += len;
	}

	return NULL;
}

bool
nvkm_boolopt(const char *optstr, const char *opt, bool value)
{
	int arglen;

	optstr = nvkm_stropt(optstr, opt, &arglen);
	if (optstr) {
		if (!strncasecmpz(optstr, "0", arglen) ||
		    !strncasecmpz(optstr, "no", arglen) ||
		    !strncasecmpz(optstr, "off", arglen) ||
		    !strncasecmpz(optstr, "false", arglen))
			value = false;
		else
		if (!strncasecmpz(optstr, "1", arglen) ||
		    !strncasecmpz(optstr, "yes", arglen) ||
		    !strncasecmpz(optstr, "on", arglen) ||
		    !strncasecmpz(optstr, "true", arglen))
			value = true;
	}

	return value;
}

long
nvkm_longopt(const char *optstr, const char *opt, long value)
{
	long result = value;
	int arglen;
	char *s;

	optstr = nvkm_stropt(optstr, opt, &arglen);
	if (optstr && (s = kstrndup(optstr, arglen, GFP_KERNEL))) {
		int ret = kstrtol(s, 0, &value);
		if (ret == 0)
			result = value;
		kfree(s);
	}

	return result;
}

int
nvkm_dbgopt(const char *optstr, const char *sub)
{
	int mode = 1, level = CONFIG_NOUVEAU_DEBUG_DEFAULT;

	while (optstr) {
		int len = strcspn(optstr, ",=");
		switch (optstr[len]) {
		case '=':
			if (strncasecmpz(optstr, sub, len))
				mode = 0;
			optstr++;
			break;
		default:
			if (mode) {
				if (!strncasecmpz(optstr, "fatal", len))
					level = NV_DBG_FATAL;
				else if (!strncasecmpz(optstr, "error", len))
					level = NV_DBG_ERROR;
				else if (!strncasecmpz(optstr, "warn", len))
					level = NV_DBG_WARN;
				else if (!strncasecmpz(optstr, "info", len))
					level = NV_DBG_INFO;
				else if (!strncasecmpz(optstr, "debug", len))
					level = NV_DBG_DEBUG;
				else if (!strncasecmpz(optstr, "trace", len))
					level = NV_DBG_TRACE;
				else if (!strncasecmpz(optstr, "paranoia", len))

Annotation

Implementation Notes