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.
- 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
core/option.hcore/debug.h
Detected Declarations
function filesfunction nvkm_booloptfunction nvkm_longoptfunction nvkm_dbgopt
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
- Immediate include surface: `core/option.h`, `core/debug.h`.
- Detected declarations: `function files`, `function nvkm_boolopt`, `function nvkm_longopt`, `function nvkm_dbgopt`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.