459 lines
16 KiB
C
459 lines
16 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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#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 "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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/*
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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,
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"Number of Vlan Discovery Requests Sent %lld\n"
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"Vlan Response Received with no FCF VLAN ID: %lld\n"
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"No solicitations recvd after vlan set, expiry count: %lld\n"
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"Flogi rejects count: %lld\n",
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(u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs),
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(u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID),
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(u64)atomic64_read(&stats->vlan_stats.sol_expiry_count),
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(u64)atomic64_read(&stats->vlan_stats.flogi_rejects));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tOther Important Statistics\n"
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"------------------------------------------\n");
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jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1);
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jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2);
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Last ISR time: %llu (%8lu.%8lu)\n"
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"Last ACK time: %llu (%8lu.%8lu)\n"
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"Number of ISRs: %lld\n"
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"Maximum CQ Entries: %lld\n"
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"Number of ACK index out of range: %lld\n"
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"Number of data count mismatch: %lld\n"
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"Number of FCPIO Timeouts: %lld\n"
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"Number of FCPIO Aborted: %lld\n"
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"Number of SGL Invalid: %lld\n"
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"Number of Copy WQ Alloc Failures for ABTs: %lld\n"
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"Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
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"Number of Copy WQ Alloc Failures for IOs: %lld\n"
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"Number of no icmnd itmf Completions: %lld\n"
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"Number of QUEUE Fulls: %lld\n"
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"Number of rport not ready: %lld\n"
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"Number of receive frame errors: %lld\n",
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(u64)stats->misc_stats.last_isr_time,
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val1.tv_sec, val1.tv_nsec,
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(u64)stats->misc_stats.last_ack_time,
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val2.tv_sec, val2.tv_nsec,
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(u64)atomic64_read(&stats->misc_stats.isr_count),
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(u64)atomic64_read(&stats->misc_stats.max_cq_entries),
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(u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
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(u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
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(u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
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(u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
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(u64)atomic64_read(&stats->misc_stats.sgl_invalid),
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(u64)atomic64_read(
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&stats->misc_stats.abts_cpwq_alloc_failures),
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(u64)atomic64_read(
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&stats->misc_stats.devrst_cpwq_alloc_failures),
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(u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
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(u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
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(u64)atomic64_read(&stats->misc_stats.queue_fulls),
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(u64)atomic64_read(&stats->misc_stats.rport_not_ready),
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(u64)atomic64_read(&stats->misc_stats.frame_errors));
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return len;
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}
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/*
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* fnic_trace_buf_init - Initialize fnic trace buffer logging facility
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*
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* Description:
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* Initialize trace buffer data structure by allocating required memory and
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* setting page_offset information for every trace entry by adding trace entry
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* length to previous page_offset value.
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*/
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int fnic_trace_buf_init(void)
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{
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unsigned long fnic_buf_head;
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int i;
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int err = 0;
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trace_max_pages = fnic_trace_max_pages;
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fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
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FNIC_ENTRY_SIZE_BYTES;
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fnic_trace_buf_p = (unsigned long)vmalloc((trace_max_pages * PAGE_SIZE));
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if (!fnic_trace_buf_p) {
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printk(KERN_ERR PFX "Failed to allocate memory "
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"for fnic_trace_buf_p\n");
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err = -ENOMEM;
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goto err_fnic_trace_buf_init;
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}
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memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE));
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fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries *
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sizeof(unsigned long));
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if (!fnic_trace_entries.page_offset) {
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printk(KERN_ERR PFX "Failed to allocate memory for"
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" page_offset\n");
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if (fnic_trace_buf_p) {
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vfree((void *)fnic_trace_buf_p);
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fnic_trace_buf_p = 0;
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}
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err = -ENOMEM;
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goto err_fnic_trace_buf_init;
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}
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memset((void *)fnic_trace_entries.page_offset, 0,
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(fnic_max_trace_entries * sizeof(unsigned long)));
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fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
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fnic_buf_head = fnic_trace_buf_p;
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/*
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* 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) {
|
|
printk(KERN_ERR PFX "Failed to initialize debugfs for tracing\n");
|
|
goto err_fnic_trace_debugfs_init;
|
|
}
|
|
printk(KERN_INFO PFX "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");
|
|
}
|