| /* |
| * This file is part of the Chelsio T4 Ethernet driver for Linux. |
| * |
| * Copyright (C) 2003-2010 Chelsio Communications. All rights reserved. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this |
| * release for licensing terms and conditions. |
| */ |
| |
| /* |
| * Definitions and inline functions for the T4 trace buffers. |
| * |
| * Authors: |
| * Felix Marti <felix@chelsio.com> |
| */ |
| |
| #ifndef __T4_TRACE_H__ |
| #define __T4_TRACE_H__ |
| |
| #ifdef T4_TRACE |
| |
| #include <linux/time.h> |
| #include <linux/timex.h> |
| |
| #define T4_TRACE_NUM_PARAM 6 |
| |
| typedef unsigned long tracearg_t; |
| |
| #define T4_TRACE0(b, s) \ |
| if ((b) != NULL) \ |
| (void) t4_trace((b), (s)); |
| #define T4_TRACE1(b, s, p0) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| } |
| #define T4_TRACE2(b, s, p0, p1) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| _p[1] = (tracearg_t) (p1); \ |
| } |
| #define T4_TRACE3(b, s, p0, p1, p2) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| _p[1] = (tracearg_t) (p1); \ |
| _p[2] = (tracearg_t) (p2); \ |
| } |
| #define T4_TRACE4(b, s, p0, p1, p2, p3) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| _p[1] = (tracearg_t) (p1); \ |
| _p[2] = (tracearg_t) (p2); \ |
| _p[3] = (tracearg_t) (p3); \ |
| } |
| #define T4_TRACE5(b, s, p0, p1, p2, p3, p4) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| _p[1] = (tracearg_t) (p1); \ |
| _p[2] = (tracearg_t) (p2); \ |
| _p[3] = (tracearg_t) (p3); \ |
| _p[4] = (tracearg_t) (p4); \ |
| } |
| #define T4_TRACE6(b, s, p0, p1, p2, p3, p4, p5) \ |
| if ((b) != NULL) { \ |
| tracearg_t *_p = t4_trace((b), (s)); \ |
| _p[0] = (tracearg_t) (p0); \ |
| _p[1] = (tracearg_t) (p1); \ |
| _p[2] = (tracearg_t) (p2); \ |
| _p[3] = (tracearg_t) (p3); \ |
| _p[4] = (tracearg_t) (p4); \ |
| _p[5] = (tracearg_t) (p5); \ |
| } |
| |
| struct trace_entry { |
| cycles_t tsc; |
| char *fmt; |
| tracearg_t param[T4_TRACE_NUM_PARAM]; |
| }; |
| |
| struct dentry; |
| |
| struct trace_buf { |
| unsigned int capacity; /* size of ring buffer */ |
| unsigned int idx; /* index of next entry to write */ |
| struct dentry *debugfs_dentry; |
| struct trace_entry ep[0]; /* the ring buffer */ |
| }; |
| |
| static inline unsigned long *t4_trace(struct trace_buf *tb, char *fmt) |
| { |
| struct trace_entry *ep = &tb->ep[tb->idx++ & (tb->capacity - 1)]; |
| |
| ep->fmt = fmt; |
| ep->tsc = get_cycles(); |
| |
| return (unsigned long *) &ep->param[0]; |
| } |
| |
| struct trace_buf *t4_trace_alloc(struct dentry *root, const char *name, |
| unsigned int capacity); |
| void t4_trace_free(struct trace_buf *tb); |
| |
| #else |
| #define T4_TRACE0(b, s) |
| #define T4_TRACE1(b, s, p0) |
| #define T4_TRACE2(b, s, p0, p1) |
| #define T4_TRACE3(b, s, p0, p1, p2) |
| #define T4_TRACE4(b, s, p0, p1, p2, p3) |
| #define T4_TRACE5(b, s, p0, p1, p2, p3, p4) |
| #define T4_TRACE6(b, s, p0, p1, p2, p3, p4, p5) |
| |
| #define t4_trace_alloc(root, name, capacity) NULL |
| #define t4_trace_free(tb) |
| #endif |
| |
| #endif /* __T4_TRACE_H__ */ |
