781 lines
26 KiB
C
781 lines
26 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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#include <linux/module.h>
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#include <linux/mempool.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/kallsyms.h>
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#include <linux/time.h>
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#include <linux/vmalloc.h>
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#include "fnic_io.h"
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#include "fnic.h"
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unsigned int trace_max_pages;
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static int fnic_max_trace_entries;
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static unsigned long fnic_trace_buf_p;
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static DEFINE_SPINLOCK(fnic_trace_lock);
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static fnic_trace_dbg_t fnic_trace_entries;
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int fnic_tracing_enabled = 1;
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/* static char *fnic_fc_ctlr_trace_buf_p; */
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static int fc_trace_max_entries;
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static unsigned long fnic_fc_ctlr_trace_buf_p;
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static fnic_trace_dbg_t fc_trace_entries;
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int fnic_fc_tracing_enabled = 1;
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int fnic_fc_trace_cleared = 1;
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static DEFINE_SPINLOCK(fnic_fc_trace_lock);
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/*
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* fnic_trace_get_buf - Give buffer pointer to user to fill up trace information
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*
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* Description:
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* This routine gets next available trace buffer entry location @wr_idx
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* from allocated trace buffer pages and give that memory location
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* to user to store the trace information.
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*
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* Return Value:
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* This routine returns pointer to next available trace entry
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* @fnic_buf_head for user to fill trace information.
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*/
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fnic_trace_data_t *fnic_trace_get_buf(void)
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{
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unsigned long fnic_buf_head;
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unsigned long flags;
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spin_lock_irqsave(&fnic_trace_lock, flags);
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/*
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* Get next available memory location for writing trace information
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* at @wr_idx and increment @wr_idx
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*/
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fnic_buf_head =
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fnic_trace_entries.page_offset[fnic_trace_entries.wr_idx];
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fnic_trace_entries.wr_idx++;
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/*
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* Verify if trace buffer is full then change wd_idx to
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* start from zero
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*/
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if (fnic_trace_entries.wr_idx >= fnic_max_trace_entries)
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fnic_trace_entries.wr_idx = 0;
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/*
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* Verify if write index @wr_idx and read index @rd_idx are same then
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* increment @rd_idx to move to next entry in trace buffer
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*/
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if (fnic_trace_entries.wr_idx == fnic_trace_entries.rd_idx) {
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fnic_trace_entries.rd_idx++;
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if (fnic_trace_entries.rd_idx >= fnic_max_trace_entries)
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fnic_trace_entries.rd_idx = 0;
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}
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return (fnic_trace_data_t *)fnic_buf_head;
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}
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/*
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* fnic_get_trace_data - Copy trace buffer to a memory file
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* @fnic_dbgfs_t: pointer to debugfs trace buffer
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*
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* Description:
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* This routine gathers the fnic trace debugfs data from the fnic_trace_data_t
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* buffer and dumps it to fnic_dbgfs_t. It will start at the rd_idx entry in
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* the log and process the log until the end of the buffer. Then it will gather
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* from the beginning of the log and process until the current entry @wr_idx.
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*
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* Return Value:
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* This routine returns the amount of bytes that were dumped into fnic_dbgfs_t
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*/
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int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
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{
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int rd_idx;
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int wr_idx;
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int len = 0;
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unsigned long flags;
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char str[KSYM_SYMBOL_LEN];
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struct timespec val;
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fnic_trace_data_t *tbp;
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spin_lock_irqsave(&fnic_trace_lock, flags);
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rd_idx = fnic_trace_entries.rd_idx;
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wr_idx = fnic_trace_entries.wr_idx;
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if (wr_idx < rd_idx) {
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while (1) {
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/* Start from read index @rd_idx */
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tbp = (fnic_trace_data_t *)
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fnic_trace_entries.page_offset[rd_idx];
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if (!tbp) {
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return 0;
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}
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/* Convert function pointer to function name */
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if (sizeof(unsigned long) < 8) {
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sprint_symbol(str, tbp->fnaddr.low);
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jiffies_to_timespec(tbp->timestamp.low, &val);
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} else {
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sprint_symbol(str, tbp->fnaddr.val);
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jiffies_to_timespec(tbp->timestamp.val, &val);
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}
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/*
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* Dump trace buffer entry to memory file
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* and increment read index @rd_idx
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*/
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len += snprintf(fnic_dbgfs_prt->buffer + len,
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(trace_max_pages * PAGE_SIZE * 3) - len,
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"%16lu.%16lu %-50s %8x %8x %16llx %16llx "
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"%16llx %16llx %16llx\n", val.tv_sec,
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val.tv_nsec, str, tbp->host_no, tbp->tag,
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tbp->data[0], tbp->data[1], tbp->data[2],
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tbp->data[3], tbp->data[4]);
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rd_idx++;
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/*
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* If rd_idx is reached to maximum trace entries
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* then move rd_idx to zero
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*/
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if (rd_idx > (fnic_max_trace_entries-1))
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rd_idx = 0;
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/*
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* Continure dumpping trace buffer entries into
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* memory file till rd_idx reaches write index
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*/
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if (rd_idx == wr_idx)
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break;
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}
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} else if (wr_idx > rd_idx) {
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while (1) {
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/* Start from read index @rd_idx */
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tbp = (fnic_trace_data_t *)
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fnic_trace_entries.page_offset[rd_idx];
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if (!tbp) {
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return 0;
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}
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/* Convert function pointer to function name */
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if (sizeof(unsigned long) < 8) {
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sprint_symbol(str, tbp->fnaddr.low);
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jiffies_to_timespec(tbp->timestamp.low, &val);
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} else {
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sprint_symbol(str, tbp->fnaddr.val);
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jiffies_to_timespec(tbp->timestamp.val, &val);
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}
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/*
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* Dump trace buffer entry to memory file
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* and increment read index @rd_idx
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*/
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len += snprintf(fnic_dbgfs_prt->buffer + len,
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(trace_max_pages * PAGE_SIZE * 3) - len,
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"%16lu.%16lu %-50s %8x %8x %16llx %16llx "
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"%16llx %16llx %16llx\n", val.tv_sec,
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val.tv_nsec, str, tbp->host_no, tbp->tag,
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tbp->data[0], tbp->data[1], tbp->data[2],
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tbp->data[3], tbp->data[4]);
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rd_idx++;
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/*
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* Continue dumpping trace buffer entries into
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* memory file till rd_idx reaches write index
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*/
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if (rd_idx == wr_idx)
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break;
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}
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}
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return len;
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}
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/*
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* fnic_get_stats_data - Copy fnic stats buffer to a memory file
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* @fnic_dbgfs_t: pointer to debugfs fnic stats buffer
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*
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* Description:
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* This routine gathers the fnic stats debugfs data from the fnic_stats struct
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* and dumps it to stats_debug_info.
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*
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* Return Value:
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* This routine returns the amount of bytes that were dumped into
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* stats_debug_info
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*/
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int fnic_get_stats_data(struct stats_debug_info *debug,
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struct fnic_stats *stats)
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{
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int len = 0;
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int buf_size = debug->buf_size;
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struct timespec val1, val2;
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len = snprintf(debug->debug_buffer + len, buf_size - len,
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"------------------------------------------\n"
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"\t\tIO Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Active IOs: %lld\nMaximum Active IOs: %lld\n"
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"Number of IOs: %lld\nNumber of IO Completions: %lld\n"
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"Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n"
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"Number of Memory alloc Failures: %lld\n"
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"Number of IOREQ Null: %lld\n"
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"Number of SCSI cmd pointer Null: %lld\n",
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(u64)atomic64_read(&stats->io_stats.active_ios),
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(u64)atomic64_read(&stats->io_stats.max_active_ios),
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(u64)atomic64_read(&stats->io_stats.num_ios),
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(u64)atomic64_read(&stats->io_stats.io_completions),
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(u64)atomic64_read(&stats->io_stats.io_failures),
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(u64)atomic64_read(&stats->io_stats.io_not_found),
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(u64)atomic64_read(&stats->io_stats.alloc_failures),
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(u64)atomic64_read(&stats->io_stats.ioreq_null),
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(u64)atomic64_read(&stats->io_stats.sc_null));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tAbort Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Aborts: %lld\n"
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"Number of Abort Failures: %lld\n"
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"Number of Abort Driver Timeouts: %lld\n"
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"Number of Abort FW Timeouts: %lld\n"
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"Number of Abort IO NOT Found: %lld\n",
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(u64)atomic64_read(&stats->abts_stats.aborts),
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(u64)atomic64_read(&stats->abts_stats.abort_failures),
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(u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts),
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(u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts),
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(u64)atomic64_read(&stats->abts_stats.abort_io_not_found));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tTerminate Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Terminates: %lld\n"
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"Maximum Terminates: %lld\n"
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"Number of Terminate Driver Timeouts: %lld\n"
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"Number of Terminate FW Timeouts: %lld\n"
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"Number of Terminate IO NOT Found: %lld\n"
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"Number of Terminate Failures: %lld\n",
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(u64)atomic64_read(&stats->term_stats.terminates),
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(u64)atomic64_read(&stats->term_stats.max_terminates),
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(u64)atomic64_read(&stats->term_stats.terminate_drv_timeouts),
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(u64)atomic64_read(&stats->term_stats.terminate_fw_timeouts),
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(u64)atomic64_read(&stats->term_stats.terminate_io_not_found),
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(u64)atomic64_read(&stats->term_stats.terminate_failures));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tReset Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Device Resets: %lld\n"
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"Number of Device Reset Failures: %lld\n"
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"Number of Device Reset Aborts: %lld\n"
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"Number of Device Reset Timeouts: %lld\n"
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"Number of Device Reset Terminates: %lld\n"
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"Number of FW Resets: %lld\n"
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"Number of FW Reset Completions: %lld\n"
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"Number of FW Reset Failures: %lld\n"
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"Number of Fnic Reset: %lld\n"
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"Number of Fnic Reset Completions: %lld\n"
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"Number of Fnic Reset Failures: %lld\n",
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(u64)atomic64_read(&stats->reset_stats.device_resets),
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(u64)atomic64_read(&stats->reset_stats.device_reset_failures),
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(u64)atomic64_read(&stats->reset_stats.device_reset_aborts),
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(u64)atomic64_read(&stats->reset_stats.device_reset_timeouts),
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(u64)atomic64_read(
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&stats->reset_stats.device_reset_terminates),
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(u64)atomic64_read(&stats->reset_stats.fw_resets),
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(u64)atomic64_read(&stats->reset_stats.fw_reset_completions),
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(u64)atomic64_read(&stats->reset_stats.fw_reset_failures),
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(u64)atomic64_read(&stats->reset_stats.fnic_resets),
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(u64)atomic64_read(
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&stats->reset_stats.fnic_reset_completions),
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(u64)atomic64_read(&stats->reset_stats.fnic_reset_failures));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tFirmware Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Active FW Requests %lld\n"
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"Maximum FW Requests: %lld\n"
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"Number of FW out of resources: %lld\n"
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"Number of FW IO errors: %lld\n",
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(u64)atomic64_read(&stats->fw_stats.active_fw_reqs),
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(u64)atomic64_read(&stats->fw_stats.max_fw_reqs),
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(u64)atomic64_read(&stats->fw_stats.fw_out_of_resources),
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(u64)atomic64_read(&stats->fw_stats.io_fw_errs));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tVlan Discovery Statistics\n"
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"------------------------------------------\n");
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|
|
len += snprintf(debug->debug_buffer + len, buf_size - len,
|
||
|
|
"Number of Vlan Discovery Requests Sent %lld\n"
|
||
|
|
"Vlan Response Received with no FCF VLAN ID: %lld\n"
|
||
|
|
"No solicitations recvd after vlan set, expiry count: %lld\n"
|
||
|
|
"Flogi rejects count: %lld\n",
|
||
|
|
(u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs),
|
||
|
|
(u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID),
|
||
|
|
(u64)atomic64_read(&stats->vlan_stats.sol_expiry_count),
|
||
|
|
(u64)atomic64_read(&stats->vlan_stats.flogi_rejects));
|
||
|
|
|
||
|
|
len += snprintf(debug->debug_buffer + len, buf_size - len,
|
||
|
|
"\n------------------------------------------\n"
|
||
|
|
"\t\tOther Important Statistics\n"
|
||
|
|
"------------------------------------------\n");
|
||
|
|
|
||
|
|
jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1);
|
||
|
|
jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2);
|
||
|
|
|
||
|
|
len += snprintf(debug->debug_buffer + len, buf_size - len,
|
||
|
|
"Last ISR time: %llu (%8lu.%8lu)\n"
|
||
|
|
"Last ACK time: %llu (%8lu.%8lu)\n"
|
||
|
|
"Number of ISRs: %lld\n"
|
||
|
|
"Maximum CQ Entries: %lld\n"
|
||
|
|
"Number of ACK index out of range: %lld\n"
|
||
|
|
"Number of data count mismatch: %lld\n"
|
||
|
|
"Number of FCPIO Timeouts: %lld\n"
|
||
|
|
"Number of FCPIO Aborted: %lld\n"
|
||
|
|
"Number of SGL Invalid: %lld\n"
|
||
|
|
"Number of Copy WQ Alloc Failures for ABTs: %lld\n"
|
||
|
|
"Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
|
||
|
|
"Number of Copy WQ Alloc Failures for IOs: %lld\n"
|
||
|
|
"Number of no icmnd itmf Completions: %lld\n"
|
||
|
|
"Number of QUEUE Fulls: %lld\n"
|
||
|
|
"Number of rport not ready: %lld\n"
|
||
|
|
"Number of receive frame errors: %lld\n",
|
||
|
|
(u64)stats->misc_stats.last_isr_time,
|
||
|
|
val1.tv_sec, val1.tv_nsec,
|
||
|
|
(u64)stats->misc_stats.last_ack_time,
|
||
|
|
val2.tv_sec, val2.tv_nsec,
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.isr_count),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.max_cq_entries),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.sgl_invalid),
|
||
|
|
(u64)atomic64_read(
|
||
|
|
&stats->misc_stats.abts_cpwq_alloc_failures),
|
||
|
|
(u64)atomic64_read(
|
||
|
|
&stats->misc_stats.devrst_cpwq_alloc_failures),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.queue_fulls),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.rport_not_ready),
|
||
|
|
(u64)atomic64_read(&stats->misc_stats.frame_errors));
|
||
|
|
|
||
|
|
return len;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fnic_trace_buf_init - Initialize fnic trace buffer logging facility
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Initialize trace buffer data structure by allocating required memory and
|
||
|
|
* setting page_offset information for every trace entry by adding trace entry
|
||
|
|
* length to previous page_offset value.
|
||
|
|
*/
|
||
|
|
int fnic_trace_buf_init(void)
|
||
|
|
{
|
||
|
|
unsigned long fnic_buf_head;
|
||
|
|
int i;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
trace_max_pages = fnic_trace_max_pages;
|
||
|
|
fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
|
||
|
|
FNIC_ENTRY_SIZE_BYTES;
|
||
|
|
|
||
|
|
fnic_trace_buf_p = (unsigned long)vmalloc((trace_max_pages * PAGE_SIZE));
|
||
|
|
if (!fnic_trace_buf_p) {
|
||
|
|
printk(KERN_ERR PFX "Failed to allocate memory "
|
||
|
|
"for fnic_trace_buf_p\n");
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err_fnic_trace_buf_init;
|
||
|
|
}
|
||
|
|
memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE));
|
||
|
|
|
||
|
|
fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries *
|
||
|
|
sizeof(unsigned long));
|
||
|
|
if (!fnic_trace_entries.page_offset) {
|
||
|
|
printk(KERN_ERR PFX "Failed to allocate memory for"
|
||
|
|
" page_offset\n");
|
||
|
|
if (fnic_trace_buf_p) {
|
||
|
|
vfree((void *)fnic_trace_buf_p);
|
||
|
|
fnic_trace_buf_p = 0;
|
||
|
|
}
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err_fnic_trace_buf_init;
|
||
|
|
}
|
||
|
|
memset((void *)fnic_trace_entries.page_offset, 0,
|
||
|
|
(fnic_max_trace_entries * sizeof(unsigned long)));
|
||
|
|
fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
|
||
|
|
fnic_buf_head = fnic_trace_buf_p;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set page_offset field of fnic_trace_entries struct by
|
||
|
|
* calculating memory location for every trace entry using
|
||
|
|
* length of each trace entry
|
||
|
|
*/
|
||
|
|
for (i = 0; i < fnic_max_trace_entries; i++) {
|
||
|
|
fnic_trace_entries.page_offset[i] = fnic_buf_head;
|
||
|
|
fnic_buf_head += FNIC_ENTRY_SIZE_BYTES;
|
||
|
|
}
|
||
|
|
err = fnic_trace_debugfs_init();
|
||
|
|
if (err < 0) {
|
||
|
|
pr_err("fnic: Failed to initialize debugfs for tracing\n");
|
||
|
|
goto err_fnic_trace_debugfs_init;
|
||
|
|
}
|
||
|
|
pr_info("fnic: Successfully Initialized Trace Buffer\n");
|
||
|
|
return err;
|
||
|
|
err_fnic_trace_debugfs_init:
|
||
|
|
fnic_trace_free();
|
||
|
|
err_fnic_trace_buf_init:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fnic_trace_free - Free memory of fnic trace data structures.
|
||
|
|
*/
|
||
|
|
void fnic_trace_free(void)
|
||
|
|
{
|
||
|
|
fnic_tracing_enabled = 0;
|
||
|
|
fnic_trace_debugfs_terminate();
|
||
|
|
if (fnic_trace_entries.page_offset) {
|
||
|
|
vfree((void *)fnic_trace_entries.page_offset);
|
||
|
|
fnic_trace_entries.page_offset = NULL;
|
||
|
|
}
|
||
|
|
if (fnic_trace_buf_p) {
|
||
|
|
vfree((void *)fnic_trace_buf_p);
|
||
|
|
fnic_trace_buf_p = 0;
|
||
|
|
}
|
||
|
|
printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fnic_fc_ctlr_trace_buf_init -
|
||
|
|
* Initialize trace buffer to log fnic control frames
|
||
|
|
* Description:
|
||
|
|
* Initialize trace buffer data structure by allocating
|
||
|
|
* required memory for trace data as well as for Indexes.
|
||
|
|
* Frame size is 256 bytes and
|
||
|
|
* memory is allocated for 1024 entries of 256 bytes.
|
||
|
|
* Page_offset(Index) is set to the address of trace entry
|
||
|
|
* and page_offset is initialized by adding frame size
|
||
|
|
* to the previous page_offset entry.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int fnic_fc_trace_init(void)
|
||
|
|
{
|
||
|
|
unsigned long fc_trace_buf_head;
|
||
|
|
int err = 0;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
|
||
|
|
FC_TRC_SIZE_BYTES;
|
||
|
|
fnic_fc_ctlr_trace_buf_p = (unsigned long)vmalloc(
|
||
|
|
fnic_fc_trace_max_pages * PAGE_SIZE);
|
||
|
|
if (!fnic_fc_ctlr_trace_buf_p) {
|
||
|
|
pr_err("fnic: Failed to allocate memory for "
|
||
|
|
"FC Control Trace Buf\n");
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err_fnic_fc_ctlr_trace_buf_init;
|
||
|
|
}
|
||
|
|
|
||
|
|
memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
|
||
|
|
fnic_fc_trace_max_pages * PAGE_SIZE);
|
||
|
|
|
||
|
|
/* Allocate memory for page offset */
|
||
|
|
fc_trace_entries.page_offset = vmalloc(fc_trace_max_entries *
|
||
|
|
sizeof(unsigned long));
|
||
|
|
if (!fc_trace_entries.page_offset) {
|
||
|
|
pr_err("fnic:Failed to allocate memory for page_offset\n");
|
||
|
|
if (fnic_fc_ctlr_trace_buf_p) {
|
||
|
|
pr_err("fnic: Freeing FC Control Trace Buf\n");
|
||
|
|
vfree((void *)fnic_fc_ctlr_trace_buf_p);
|
||
|
|
fnic_fc_ctlr_trace_buf_p = 0;
|
||
|
|
}
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err_fnic_fc_ctlr_trace_buf_init;
|
||
|
|
}
|
||
|
|
memset((void *)fc_trace_entries.page_offset, 0,
|
||
|
|
(fc_trace_max_entries * sizeof(unsigned long)));
|
||
|
|
|
||
|
|
fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
|
||
|
|
fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set up fc_trace_entries.page_offset field with memory location
|
||
|
|
* for every trace entry
|
||
|
|
*/
|
||
|
|
for (i = 0; i < fc_trace_max_entries; i++) {
|
||
|
|
fc_trace_entries.page_offset[i] = fc_trace_buf_head;
|
||
|
|
fc_trace_buf_head += FC_TRC_SIZE_BYTES;
|
||
|
|
}
|
||
|
|
err = fnic_fc_trace_debugfs_init();
|
||
|
|
if (err < 0) {
|
||
|
|
pr_err("fnic: Failed to initialize FC_CTLR tracing.\n");
|
||
|
|
goto err_fnic_fc_ctlr_trace_debugfs_init;
|
||
|
|
}
|
||
|
|
pr_info("fnic: Successfully Initialized FC_CTLR Trace Buffer\n");
|
||
|
|
return err;
|
||
|
|
|
||
|
|
err_fnic_fc_ctlr_trace_debugfs_init:
|
||
|
|
fnic_fc_trace_free();
|
||
|
|
err_fnic_fc_ctlr_trace_buf_init:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Fnic_fc_ctlr_trace_free - Free memory of fnic_fc_ctlr trace data structures.
|
||
|
|
*/
|
||
|
|
void fnic_fc_trace_free(void)
|
||
|
|
{
|
||
|
|
fnic_fc_tracing_enabled = 0;
|
||
|
|
fnic_fc_trace_debugfs_terminate();
|
||
|
|
if (fc_trace_entries.page_offset) {
|
||
|
|
vfree((void *)fc_trace_entries.page_offset);
|
||
|
|
fc_trace_entries.page_offset = NULL;
|
||
|
|
}
|
||
|
|
if (fnic_fc_ctlr_trace_buf_p) {
|
||
|
|
vfree((void *)fnic_fc_ctlr_trace_buf_p);
|
||
|
|
fnic_fc_ctlr_trace_buf_p = 0;
|
||
|
|
}
|
||
|
|
pr_info("fnic:Successfully FC_CTLR Freed Trace Buffer\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fnic_fc_ctlr_set_trace_data:
|
||
|
|
* Maintain rd & wr idx accordingly and set data
|
||
|
|
* Passed parameters:
|
||
|
|
* host_no: host number accociated with fnic
|
||
|
|
* frame_type: send_frame, rece_frame or link event
|
||
|
|
* fc_frame: pointer to fc_frame
|
||
|
|
* frame_len: Length of the fc_frame
|
||
|
|
* Description:
|
||
|
|
* This routine will get next available wr_idx and
|
||
|
|
* copy all passed trace data to the buffer pointed by wr_idx
|
||
|
|
* and increment wr_idx. It will also make sure that we dont
|
||
|
|
* overwrite the entry which we are reading and also
|
||
|
|
* wrap around if we reach the maximum entries.
|
||
|
|
* Returned Value:
|
||
|
|
* It will return 0 for success or -1 for failure
|
||
|
|
*/
|
||
|
|
int fnic_fc_trace_set_data(u32 host_no, u8 frame_type,
|
||
|
|
char *frame, u32 fc_trc_frame_len)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
struct fc_trace_hdr *fc_buf;
|
||
|
|
unsigned long eth_fcoe_hdr_len;
|
||
|
|
char *fc_trace;
|
||
|
|
|
||
|
|
if (fnic_fc_tracing_enabled == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&fnic_fc_trace_lock, flags);
|
||
|
|
|
||
|
|
if (fnic_fc_trace_cleared == 1) {
|
||
|
|
fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
|
||
|
|
pr_info("fnic: Resetting the read idx\n");
|
||
|
|
memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
|
||
|
|
fnic_fc_trace_max_pages * PAGE_SIZE);
|
||
|
|
fnic_fc_trace_cleared = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
fc_buf = (struct fc_trace_hdr *)
|
||
|
|
fc_trace_entries.page_offset[fc_trace_entries.wr_idx];
|
||
|
|
|
||
|
|
fc_trace_entries.wr_idx++;
|
||
|
|
|
||
|
|
if (fc_trace_entries.wr_idx >= fc_trace_max_entries)
|
||
|
|
fc_trace_entries.wr_idx = 0;
|
||
|
|
|
||
|
|
if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
|
||
|
|
fc_trace_entries.rd_idx++;
|
||
|
|
if (fc_trace_entries.rd_idx >= fc_trace_max_entries)
|
||
|
|
fc_trace_entries.rd_idx = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
fc_buf->time_stamp = CURRENT_TIME;
|
||
|
|
fc_buf->host_no = host_no;
|
||
|
|
fc_buf->frame_type = frame_type;
|
||
|
|
|
||
|
|
fc_trace = (char *)FC_TRACE_ADDRESS(fc_buf);
|
||
|
|
|
||
|
|
/* During the receive path, we do not have eth hdr as well as fcoe hdr
|
||
|
|
* at trace entry point so we will stuff 0xff just to make it generic.
|
||
|
|
*/
|
||
|
|
if (frame_type == FNIC_FC_RECV) {
|
||
|
|
eth_fcoe_hdr_len = sizeof(struct ethhdr) +
|
||
|
|
sizeof(struct fcoe_hdr);
|
||
|
|
memset((char *)fc_trace, 0xff, eth_fcoe_hdr_len);
|
||
|
|
/* Copy the rest of data frame */
|
||
|
|
memcpy((char *)(fc_trace + eth_fcoe_hdr_len), (void *)frame,
|
||
|
|
min_t(u8, fc_trc_frame_len,
|
||
|
|
(u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE
|
||
|
|
- eth_fcoe_hdr_len)));
|
||
|
|
} else {
|
||
|
|
memcpy((char *)fc_trace, (void *)frame,
|
||
|
|
min_t(u8, fc_trc_frame_len,
|
||
|
|
(u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Store the actual received length */
|
||
|
|
fc_buf->frame_len = fc_trc_frame_len;
|
||
|
|
|
||
|
|
spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* fnic_fc_ctlr_get_trace_data: Copy trace buffer to a memory file
|
||
|
|
* Passed parameter:
|
||
|
|
* @fnic_dbgfs_t: pointer to debugfs trace buffer
|
||
|
|
* rdata_flag: 1 => Unformated file
|
||
|
|
* 0 => formated file
|
||
|
|
* Description:
|
||
|
|
* This routine will copy the trace data to memory file with
|
||
|
|
* proper formatting and also copy to another memory
|
||
|
|
* file without formatting for further procesing.
|
||
|
|
* Retrun Value:
|
||
|
|
* Number of bytes that were dumped into fnic_dbgfs_t
|
||
|
|
*/
|
||
|
|
|
||
|
|
int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag)
|
||
|
|
{
|
||
|
|
int rd_idx, wr_idx;
|
||
|
|
unsigned long flags;
|
||
|
|
int len = 0, j;
|
||
|
|
struct fc_trace_hdr *tdata;
|
||
|
|
char *fc_trace;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&fnic_fc_trace_lock, flags);
|
||
|
|
if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) {
|
||
|
|
spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
|
||
|
|
pr_info("fnic: Buffer is empty\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
rd_idx = fc_trace_entries.rd_idx;
|
||
|
|
wr_idx = fc_trace_entries.wr_idx;
|
||
|
|
if (rdata_flag == 0) {
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
(fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
|
||
|
|
"Time Stamp (UTC)\t\t"
|
||
|
|
"Host No: F Type: len: FCoE_FRAME:\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
while (rd_idx != wr_idx) {
|
||
|
|
tdata = (struct fc_trace_hdr *)
|
||
|
|
fc_trace_entries.page_offset[rd_idx];
|
||
|
|
if (!tdata) {
|
||
|
|
pr_info("fnic: Rd data is NULL\n");
|
||
|
|
spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (rdata_flag == 0) {
|
||
|
|
copy_and_format_trace_data(tdata,
|
||
|
|
fnic_dbgfs_prt, &len, rdata_flag);
|
||
|
|
} else {
|
||
|
|
fc_trace = (char *)tdata;
|
||
|
|
for (j = 0; j < FC_TRC_SIZE_BYTES; j++) {
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
(fnic_fc_trace_max_pages * PAGE_SIZE * 3)
|
||
|
|
- len, "%02x", fc_trace[j] & 0xff);
|
||
|
|
} /* for loop */
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
(fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len,
|
||
|
|
"\n");
|
||
|
|
}
|
||
|
|
rd_idx++;
|
||
|
|
if (rd_idx > (fc_trace_max_entries - 1))
|
||
|
|
rd_idx = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_unlock_irqrestore(&fnic_fc_trace_lock, flags);
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* copy_and_format_trace_data: Copy formatted data to char * buffer
|
||
|
|
* Passed Parameter:
|
||
|
|
* @fc_trace_hdr_t: pointer to trace data
|
||
|
|
* @fnic_dbgfs_t: pointer to debugfs trace buffer
|
||
|
|
* @orig_len: pointer to len
|
||
|
|
* rdata_flag: 0 => Formated file, 1 => Unformated file
|
||
|
|
* Description:
|
||
|
|
* This routine will format and copy the passed trace data
|
||
|
|
* for formated file or unformated file accordingly.
|
||
|
|
*/
|
||
|
|
|
||
|
|
void copy_and_format_trace_data(struct fc_trace_hdr *tdata,
|
||
|
|
fnic_dbgfs_t *fnic_dbgfs_prt, int *orig_len,
|
||
|
|
u8 rdata_flag)
|
||
|
|
{
|
||
|
|
struct tm tm;
|
||
|
|
int j, i = 1, len;
|
||
|
|
char *fc_trace, *fmt;
|
||
|
|
int ethhdr_len = sizeof(struct ethhdr) - 1;
|
||
|
|
int fcoehdr_len = sizeof(struct fcoe_hdr);
|
||
|
|
int fchdr_len = sizeof(struct fc_frame_header);
|
||
|
|
int max_size = fnic_fc_trace_max_pages * PAGE_SIZE * 3;
|
||
|
|
|
||
|
|
tdata->frame_type = tdata->frame_type & 0x7F;
|
||
|
|
|
||
|
|
len = *orig_len;
|
||
|
|
|
||
|
|
time_to_tm(tdata->time_stamp.tv_sec, 0, &tm);
|
||
|
|
|
||
|
|
fmt = "%02d:%02d:%04ld %02d:%02d:%02d.%09lu ns%8x %c%8x\t";
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
max_size - len,
|
||
|
|
fmt,
|
||
|
|
tm.tm_mon + 1, tm.tm_mday, tm.tm_year + 1900,
|
||
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec,
|
||
|
|
tdata->time_stamp.tv_nsec, tdata->host_no,
|
||
|
|
tdata->frame_type, tdata->frame_len);
|
||
|
|
|
||
|
|
fc_trace = (char *)FC_TRACE_ADDRESS(tdata);
|
||
|
|
|
||
|
|
for (j = 0; j < min_t(u8, tdata->frame_len,
|
||
|
|
(u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)); j++) {
|
||
|
|
if (tdata->frame_type == FNIC_FC_LE) {
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
max_size - len, "%c", fc_trace[j]);
|
||
|
|
} else {
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
max_size - len, "%02x", fc_trace[j] & 0xff);
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
max_size - len, " ");
|
||
|
|
if (j == ethhdr_len ||
|
||
|
|
j == ethhdr_len + fcoehdr_len ||
|
||
|
|
j == ethhdr_len + fcoehdr_len + fchdr_len ||
|
||
|
|
(i > 3 && j%fchdr_len == 0)) {
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer
|
||
|
|
+ len, max_size - len,
|
||
|
|
"\n\t\t\t\t\t\t\t\t");
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
} /* end of else*/
|
||
|
|
} /* End of for loop*/
|
||
|
|
len += snprintf(fnic_dbgfs_prt->buffer + len,
|
||
|
|
max_size - len, "\n");
|
||
|
|
*orig_len = len;
|
||
|
|
}
|