1 /* 2 * linux/drivers/scsi/esas2r/esas2r_log.h 3 * For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers 4 * 5 * Copyright (c) 2001-2013 ATTO Technology, Inc. 6 * (mailto:linuxdrivers@attotech.com) 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 2 11 * of the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * NO WARRANTY 19 * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR 20 * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT 21 * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, 22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is 23 * solely responsible for determining the appropriateness of using and 24 * distributing the Program and assumes all risks associated with its 25 * exercise of rights under this Agreement, including but not limited to 26 * the risks and costs of program errors, damage to or loss of data, 27 * programs or equipment, and unavailability or interruption of operations. 28 * 29 * DISCLAIMER OF LIABILITY 30 * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY 31 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND 33 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 34 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 35 * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED 36 * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 37 * 38 * You should have received a copy of the GNU General Public License 39 * along with this program; if not, write to the Free Software 40 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 41 * USA. 42 */ 43 44 #ifndef __esas2r_log_h__ 45 #define __esas2r_log_h__ 46 47 struct device; 48 49 enum { 50 ESAS2R_LOG_NONE = 0, /* no events logged */ 51 ESAS2R_LOG_CRIT = 1, /* critical events */ 52 ESAS2R_LOG_WARN = 2, /* warning events */ 53 ESAS2R_LOG_INFO = 3, /* info events */ 54 ESAS2R_LOG_DEBG = 4, /* debugging events */ 55 ESAS2R_LOG_TRCE = 5, /* tracing events */ 56 57 #ifdef ESAS2R_TRACE 58 ESAS2R_LOG_DFLT = ESAS2R_LOG_TRCE 59 #else 60 ESAS2R_LOG_DFLT = ESAS2R_LOG_WARN 61 #endif 62 }; 63 64 int esas2r_log(const long level, const char *format, ...); 65 int esas2r_log_dev(const long level, 66 const struct device *dev, 67 const char *format, 68 ...); 69 int esas2r_log_hexdump(const long level, 70 const void *buf, 71 size_t len); 72 73 /* 74 * the following macros are provided specifically for debugging and tracing 75 * messages. esas2r_debug() is provided for generic non-hardware layer 76 * debugging and tracing events. esas2r_hdebug is provided specifically for 77 * hardware layer debugging and tracing events. 78 */ 79 80 #ifdef ESAS2R_DEBUG 81 #define esas2r_debug(f, args ...) esas2r_log(ESAS2R_LOG_DEBG, f, ## args) 82 #define esas2r_hdebug(f, args ...) esas2r_log(ESAS2R_LOG_DEBG, f, ## args) 83 #else 84 #define esas2r_debug(f, args ...) 85 #define esas2r_hdebug(f, args ...) 86 #endif /* ESAS2R_DEBUG */ 87 88 /* 89 * the following macros are provided in order to trace the driver and catch 90 * some more serious bugs. be warned, enabling these macros may *severely* 91 * impact performance. 92 */ 93 94 #ifdef ESAS2R_TRACE 95 #define esas2r_bugon() \ 96 do { \ 97 esas2r_log(ESAS2R_LOG_TRCE, "esas2r_bugon() called in %s:%d" \ 98 " - dumping stack and stopping kernel", __func__, \ 99 __LINE__); \ 100 dump_stack(); \ 101 BUG(); \ 102 } while (0) 103 104 #define esas2r_trace_enter() esas2r_log(ESAS2R_LOG_TRCE, "entered %s (%s:%d)", \ 105 __func__, __FILE__, __LINE__) 106 #define esas2r_trace_exit() esas2r_log(ESAS2R_LOG_TRCE, "exited %s (%s:%d)", \ 107 __func__, __FILE__, __LINE__) 108 #define esas2r_trace(f, args ...) esas2r_log(ESAS2R_LOG_TRCE, "(%s:%s:%d): " \ 109 f, __func__, __FILE__, __LINE__, \ 110 ## args) 111 #else 112 #define esas2r_bugon() 113 #define esas2r_trace_enter() 114 #define esas2r_trace_exit() 115 #define esas2r_trace(f, args ...) 116 #endif /* ESAS2R_TRACE */ 117 118 #endif /* __esas2r_log_h__ */ 119