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/*
* Copyright 2012 Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __FNIC_TRACE_H__
#define __FNIC_TRACE_H__
#define FNIC_ENTRY_SIZE_BYTES 64
extern ssize_t simple_read_from_buffer(void __user *to,
size_t count,
loff_t *ppos,
const void *from,
size_t available);
extern unsigned int fnic_trace_max_pages;
extern int fnic_tracing_enabled;
extern unsigned int trace_max_pages;
typedef struct fnic_trace_dbg {
int wr_idx;
int rd_idx;
unsigned long *page_offset;
} fnic_trace_dbg_t;
typedef struct fnic_dbgfs {
int buffer_len;
char *buffer;
} fnic_dbgfs_t;
struct fnic_trace_data {
union {
struct {
u32 low;
u32 high;
};
u64 val;
} timestamp, fnaddr;
u32 host_no;
u32 tag;
u64 data[5];
} __attribute__((__packed__));
typedef struct fnic_trace_data fnic_trace_data_t;
#define FNIC_TRACE_ENTRY_SIZE \
(FNIC_ENTRY_SIZE_BYTES - sizeof(fnic_trace_data_t))
#define FNIC_TRACE(_fn, _hn, _t, _a, _b, _c, _d, _e) \
if (unlikely(fnic_tracing_enabled)) { \
fnic_trace_data_t *trace_buf = fnic_trace_get_buf(); \
if (trace_buf) { \
if (sizeof(unsigned long) < 8) { \
trace_buf->timestamp.low = jiffies; \
trace_buf->fnaddr.low = (u32)(unsigned long)_fn; \
} else { \
trace_buf->timestamp.val = jiffies; \
trace_buf->fnaddr.val = (u64)(unsigned long)_fn; \
} \
trace_buf->host_no = _hn; \
trace_buf->tag = _t; \
trace_buf->data[0] = (u64)(unsigned long)_a; \
trace_buf->data[1] = (u64)(unsigned long)_b; \
trace_buf->data[2] = (u64)(unsigned long)_c; \
trace_buf->data[3] = (u64)(unsigned long)_d; \
trace_buf->data[4] = (u64)(unsigned long)_e; \
} \
}
fnic_trace_data_t *fnic_trace_get_buf(void);
int fnic_get_trace_data(fnic_dbgfs_t *);
int fnic_trace_buf_init(void);
void fnic_trace_free(void);
int fnic_trace_debugfs_init(void);
void fnic_trace_debugfs_terminate(void);
#endif
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