/*
* 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.
* [Insert appropriate license here when releasing outside of Cisco]
* $Id: fnic_trace.h 95328 2012-02-09 01:42:58Z hiralpat $
*/
#ifndef __FNIC_TRACE_H__
#define __FNIC_TRACE_H__
#define FNIC_ENTRY_SIZE_BYTES 64
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 long *page_offset;
} fnic_trace_dbg_t;
typedef struct fnic_dbgfs {
int buffer_len;
char *buffer;
} fnic_dbgfs_t;
struct fnic_trace_data {
u64 timestamp;
u64 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) { \
trace_buf->timestamp = jiffies; \
trace_buf->fnaddr = _fn; \
trace_buf->host_no = _hn; \
trace_buf->tag = _t; \
trace_buf->data[0] = _a; \
trace_buf->data[1] = _b; \
trace_buf->data[2] = _c; \
trace_buf->data[3] = _d; \
trace_buf->data[4] = _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);
#endif