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Fnic Ctlr Path Trace utility is a tracing functionality built directly into fnic driver to trace the control path frames like discovery, FLOGI request/reply, PLOGI request/reply, link event etc. It will be one trace file for all fnics. It will help us to debug and resolve the discovery and initialization related issues in more convenient way. This trace information includes time stamp, Host Number, Frame type, Frame Length and Frame. By default,64 pages are allocated but we can change the number of allocated pages by module parameter fnic_fc_trace_max_page. Each entry is of 256 byte and available entries are depends on allocated number of pages. We can turn on or off the fnic control path trace functionality by module paramter fc_trace_enable and/or reset the trace contain by module paramter fc_trace_clear. Signed-off-by: Hiral Shah <hishah@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
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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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#define FC_TRC_SIZE_BYTES 256
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#define FC_TRC_HEADER_SIZE sizeof(struct fc_trace_hdr)
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/*
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* Fisrt bit of FNIC_FC_RECV and FNIC_FC_SEND is used to represent the type
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* of frame 1 => Eth frame, 0=> FC frame
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*/
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#define FNIC_FC_RECV 0x52 /* Character R */
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#define FNIC_FC_SEND 0x54 /* Character T */
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#define FNIC_FC_LE 0x4C /* Character L */
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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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extern unsigned int fnic_fc_trace_max_pages;
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extern int fnic_fc_tracing_enabled;
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extern int fnic_fc_trace_cleared;
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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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struct fc_trace_hdr {
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struct timespec time_stamp;
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u32 host_no;
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u8 frame_type;
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u8 frame_len;
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} __attribute__((__packed__));
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#define FC_TRACE_ADDRESS(a) \
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((unsigned long)(a) + sizeof(struct fc_trace_hdr))
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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_debugfs_init(void);
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void fnic_debugfs_terminate(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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/* Fnic FC CTLR Trace releated function */
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int fnic_fc_trace_init(void);
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void fnic_fc_trace_free(void);
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int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
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char *frame, u32 fc_frame_len);
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int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag);
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void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
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fnic_dbgfs_t *fnic_dbgfs_prt,
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int *len, u8 rdata_flag);
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int fnic_fc_trace_debugfs_init(void);
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void fnic_fc_trace_debugfs_terminate(void);
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#endif
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