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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167// SPDX-License-Identifier: GPL-2.0-only/* * Kernel module for testing dynamic_debug * * Authors: * Jim Cromie <jim.cromie@gmail.com> */
#define pr_fmt(fmt) "test_dd: " fmt
#include <linux/module.h>
/* run tests by reading or writing sysfs node: do_prints */
static void do_prints(void); /* device under test */static int param_set_do_prints(const char *instr, const struct kernel_param *kp){ do_prints(); return 0;}static int param_get_do_prints(char *buffer, const struct kernel_param *kp){ do_prints(); return scnprintf(buffer, PAGE_SIZE, "did do_prints\n");}static const struct kernel_param_ops param_ops_do_prints = { .set = param_set_do_prints, .get = param_get_do_prints,};module_param_cb(do_prints, ¶m_ops_do_prints, NULL, 0600);
/* * Using the CLASSMAP api: * - classmaps must have corresponding enum * - enum symbols must match/correlate with class-name strings in the map. * - base must equal enum's 1st value * - multiple maps must set their base to share the 0-30 class_id space !! * (build-bug-on tips welcome) * Additionally, here: * - tie together sysname, mapname, bitsname, flagsname */#define DD_SYS_WRAP(_model, _flags) \ static unsigned long bits_##_model; \ static struct ddebug_class_param _flags##_model = { \ .bits = &bits_##_model, \ .flags = #_flags, \ .map = &map_##_model, \ }; \ module_param_cb(_flags##_##_model, ¶m_ops_dyndbg_classes, &_flags##_model, 0600)
/* numeric input, independent bits */enum cat_disjoint_bits { D2_CORE = 0, D2_DRIVER, D2_KMS, D2_PRIME, D2_ATOMIC, D2_VBL, D2_STATE, D2_LEASE, D2_DP, D2_DRMRES };DECLARE_DYNDBG_CLASSMAP(map_disjoint_bits, DD_CLASS_TYPE_DISJOINT_BITS, 0, "D2_CORE", "D2_DRIVER", "D2_KMS", "D2_PRIME", "D2_ATOMIC", "D2_VBL", "D2_STATE", "D2_LEASE", "D2_DP", "D2_DRMRES");DD_SYS_WRAP(disjoint_bits, p);DD_SYS_WRAP(disjoint_bits, T);
/* symbolic input, independent bits */enum cat_disjoint_names { LOW = 11, MID, HI };DECLARE_DYNDBG_CLASSMAP(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10, "LOW", "MID", "HI");DD_SYS_WRAP(disjoint_names, p);DD_SYS_WRAP(disjoint_names, T);
/* numeric verbosity, V2 > V1 related */enum cat_level_num { V0 = 14, V1, V2, V3, V4, V5, V6, V7 };DECLARE_DYNDBG_CLASSMAP(map_level_num, DD_CLASS_TYPE_LEVEL_NUM, 14, "V0", "V1", "V2", "V3", "V4", "V5", "V6", "V7");DD_SYS_WRAP(level_num, p);DD_SYS_WRAP(level_num, T);
/* symbolic verbosity */enum cat_level_names { L0 = 22, L1, L2, L3, L4, L5, L6, L7 };DECLARE_DYNDBG_CLASSMAP(map_level_names, DD_CLASS_TYPE_LEVEL_NAMES, 22, "L0", "L1", "L2", "L3", "L4", "L5", "L6", "L7");DD_SYS_WRAP(level_names, p);DD_SYS_WRAP(level_names, T);
/* stand-in for all pr_debug etc */#define prdbg(SYM) __pr_debug_cls(SYM, #SYM " msg\n")
static void do_cats(void){ pr_debug("doing categories\n");
prdbg(LOW); prdbg(MID); prdbg(HI);
prdbg(D2_CORE); prdbg(D2_DRIVER); prdbg(D2_KMS); prdbg(D2_PRIME); prdbg(D2_ATOMIC); prdbg(D2_VBL); prdbg(D2_STATE); prdbg(D2_LEASE); prdbg(D2_DP); prdbg(D2_DRMRES);}
static void do_levels(void){ pr_debug("doing levels\n");
prdbg(V1); prdbg(V2); prdbg(V3); prdbg(V4); prdbg(V5); prdbg(V6); prdbg(V7);
prdbg(L1); prdbg(L2); prdbg(L3); prdbg(L4); prdbg(L5); prdbg(L6); prdbg(L7);}
static void do_prints(void){ do_cats(); do_levels();}
static int __init test_dynamic_debug_init(void){ pr_debug("init start\n"); do_prints(); pr_debug("init done\n"); return 0;}
static void __exit test_dynamic_debug_exit(void){ pr_debug("exited\n");}
module_init(test_dynamic_debug_init);module_exit(test_dynamic_debug_exit);
MODULE_AUTHOR("Jim Cromie <jim.cromie@gmail.com>");MODULE_DESCRIPTION("Kernel module for testing dynamic_debug");MODULE_LICENSE("GPL");