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authorInaky Perez-Gonzalez <inaky@linux.intel.com>2009-09-02 15:36:05 -0700
committerInaky Perez-Gonzalez <inaky@linux.intel.com>2009-10-19 15:55:50 +0900
commit4c2b1a11646bf74e2926ce8b13a21884adc1e05c (patch)
tree59cd5b59b21969264c6833b567b828484a6d76ed /include/linux/wimax/debug.h
parent4dc1bf074e4db5aa281a7b82ceebb24df98922d2 (diff)
wimax: allow specifying debug levels as command line option
Add "debug" module options to all the wimax modules (including drivers) so that the debug levels can be set upon kernel boot or module load time. This is needed as currently there was a limitation where the debug levels could only be set when a device was succesfully enumerated. This made it difficult to debug issues that made a device not probe properly. Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Diffstat (limited to 'include/linux/wimax/debug.h')
-rw-r--r--include/linux/wimax/debug.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/wimax/debug.h b/include/linux/wimax/debug.h
index c703e034042..db8096e8853 100644
--- a/include/linux/wimax/debug.h
+++ b/include/linux/wimax/debug.h
@@ -450,4 +450,76 @@ do { \
})
+static inline
+void d_submodule_set(struct d_level *d_level, size_t d_level_size,
+ const char *submodule, u8 level, const char *tag)
+{
+ struct d_level *itr, *top;
+ int index = -1;
+
+ for (itr = d_level, top = itr + d_level_size; itr < top; itr++) {
+ index++;
+ if (itr->name == NULL) {
+ printk(KERN_ERR "%s: itr->name NULL?? (%p, #%d)\n",
+ tag, itr, index);
+ continue;
+ }
+ if (!strcmp(itr->name, submodule)) {
+ itr->level = level;
+ return;
+ }
+ }
+ printk(KERN_ERR "%s: unknown submodule %s\n", tag, submodule);
+}
+
+
+/**
+ * d_parse_params - Parse a string with debug parameters from the
+ * command line
+ *
+ * @d_level: level structure (D_LEVEL)
+ * @d_level_size: number of items in the level structure
+ * (D_LEVEL_SIZE).
+ * @_params: string with the parameters; this is a space (not tab!)
+ * separated list of NAME:VALUE, where value is the debug level
+ * and NAME is the name of the submodule.
+ * @tag: string for error messages (example: MODULE.ARGNAME).
+ */
+static inline
+void d_parse_params(struct d_level *d_level, size_t d_level_size,
+ const char *_params, const char *tag)
+{
+ char submodule[130], *params, *params_orig, *token, *colon;
+ unsigned level, tokens;
+
+ if (_params == NULL)
+ return;
+ params_orig = kstrdup(_params, GFP_KERNEL);
+ params = params_orig;
+ while (1) {
+ token = strsep(&params, " ");
+ if (token == NULL)
+ break;
+ if (*token == '\0') /* eat joint spaces */
+ continue;
+ /* kernel's sscanf %s eats until whitespace, so we
+ * replace : by \n so it doesn't get eaten later by
+ * strsep */
+ colon = strchr(token, ':');
+ if (colon != NULL)
+ *colon = '\n';
+ tokens = sscanf(token, "%s\n%u", submodule, &level);
+ if (colon != NULL)
+ *colon = ':'; /* set back, for error messages */
+ if (tokens == 2)
+ d_submodule_set(d_level, d_level_size,
+ submodule, level, tag);
+ else
+ printk(KERN_ERR "%s: can't parse '%s' as a "
+ "SUBMODULE:LEVEL (%d tokens)\n",
+ tag, token, tokens);
+ }
+ kfree(params_orig);
+}
+
#endif /* #ifndef __debug__h__ */