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