| 1 | #include <linux/kernel.h> |
| 2 | #include <linux/slab.h> |
| 3 | #include <linux/time.h> |
| 4 | #include "dbg-trace.h" |
| 5 | |
| 6 | #define TRACE_ARR_LEN 800 |
| 7 | #define STR_LEN 128 |
| 8 | struct trace { |
| 9 | struct timeval tv; |
| 10 | char str[STR_LEN]; |
| 11 | unsigned int callback_val1; |
| 12 | unsigned int callback_val2; |
| 13 | char valid; |
| 14 | }; |
| 15 | static unsigned int (*trc_callback1) (unsigned char) = NULL; |
| 16 | static unsigned int (*trc_callback2) (unsigned char) = NULL; |
| 17 | static unsigned char trc_param1 = 0; |
| 18 | static unsigned char trc_param2 = 0; |
| 19 | struct trace *trc_arr; |
| 20 | static int trc_index; |
| 21 | static int trc_active = 0; |
| 22 | |
| 23 | void TRC_START() |
| 24 | { |
| 25 | trc_active = 1; |
| 26 | } |
| 27 | |
| 28 | void TRC_STOP() |
| 29 | { |
| 30 | trc_active = 0; |
| 31 | } |
| 32 | |
| 33 | void TRC_INIT(void *callback1, void *callback2, unsigned char callback1_param, unsigned char callback2_param) |
| 34 | { |
| 35 | printk("Marvell debug tracing is on\n"); |
| 36 | trc_arr = (struct trace *)kmalloc(TRACE_ARR_LEN*sizeof(struct trace),GFP_KERNEL); |
| 37 | if(trc_arr == NULL) |
| 38 | { |
| 39 | printk("Can't allocate Debug Trace buffer\n"); |
| 40 | return; |
| 41 | } |
| 42 | memset(trc_arr,0,TRACE_ARR_LEN*sizeof(struct trace)); |
| 43 | trc_index = 0; |
| 44 | trc_callback1 = callback1; |
| 45 | trc_callback2 = callback2; |
| 46 | trc_param1 = callback1_param; |
| 47 | trc_param2 = callback2_param; |
| 48 | } |
| 49 | void TRC_REC(char *fmt,...) |
| 50 | { |
| 51 | va_list args; |
| 52 | struct trace *trc = &trc_arr[trc_index]; |
| 53 | |
| 54 | if(trc_active == 0) |
| 55 | return; |
| 56 | |
| 57 | do_gettimeofday(&trc->tv); |
| 58 | if(trc_callback1) |
| 59 | trc->callback_val1 = trc_callback1(trc_param1); |
| 60 | if(trc_callback2) |
| 61 | trc->callback_val2 = trc_callback2(trc_param2); |
| 62 | va_start(args, fmt); |
| 63 | vsprintf(trc->str,fmt,args); |
| 64 | va_end(args); |
| 65 | trc->valid = 1; |
| 66 | if((++trc_index) == TRACE_ARR_LEN) { |
| 67 | trc_index = 0; |
| 68 | } |
| 69 | } |
| 70 | void TRC_OUTPUT(void) |
| 71 | { |
| 72 | int i,j; |
| 73 | struct trace *p; |
| 74 | printk("\n\nTrace %d items\n",TRACE_ARR_LEN); |
| 75 | for(i=0,j=trc_index; i<TRACE_ARR_LEN; i++,j++) { |
| 76 | if(j == TRACE_ARR_LEN) |
| 77 | j = 0; |
| 78 | p = &trc_arr[j]; |
| 79 | if(p->valid) { |
| 80 | unsigned long uoffs; |
| 81 | struct trace *plast; |
| 82 | if(p == &trc_arr[0]) |
| 83 | plast = &trc_arr[TRACE_ARR_LEN-1]; |
| 84 | else |
| 85 | plast = p-1; |
| 86 | if(p->tv.tv_sec == ((plast)->tv.tv_sec)) |
| 87 | uoffs = (p->tv.tv_usec - ((plast)->tv.tv_usec)); |
| 88 | else |
| 89 | uoffs = (1000000 - ((plast)->tv.tv_usec)) + |
| 90 | ((p->tv.tv_sec - ((plast)->tv.tv_sec) - 1) * 1000000) + |
| 91 | p->tv.tv_usec; |
| 92 | printk("%03d: [+%ld usec]", j, (unsigned long)uoffs); |
| 93 | if(trc_callback1) |
| 94 | printk("[%u]",p->callback_val1); |
| 95 | if(trc_callback2) |
| 96 | printk("[%u]",p->callback_val2); |
| 97 | printk(": %s",p->str); |
| 98 | } |
| 99 | p->valid = 0; |
| 100 | } |
| 101 | memset(trc_arr,0,TRACE_ARR_LEN*sizeof(struct trace)); |
| 102 | trc_index = 0; |
| 103 | } |
| 104 | void TRC_RELEASE(void) |
| 105 | { |
| 106 | kfree(trc_arr); |
| 107 | trc_index = 0; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | |
