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cxgb4: Added support in debugfs to dump different timer and clock values of the adapter 

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-01-27 13:47:49 +05:30 committed by David S. Miller
parent b3bbe36a26
commit b58b667687
2 changed files with 86 additions and 0 deletions
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63
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
View File

@ -380,6 +380,68 @@ static const struct file_operations pm_stats_debugfs_fops = {
.write = pm_stats_clear
};
/* Format a value in a unit that differs from the value's native unit by the
* given factor.
*/
static char *unit_conv(char *buf, size_t len, unsigned int val,
unsigned int factor)
{
unsigned int rem = val % factor;
if (rem == 0) {
snprintf(buf, len, "%u", val / factor);
} else {
while (rem % 10 == 0)
rem /= 10;
snprintf(buf, len, "%u.%u", val / factor, rem);
}
return buf;
}
static int clk_show(struct seq_file *seq, void *v)
{
char buf[32];
struct adapter *adap = seq->private;
unsigned int cclk_ps = 1000000000 / adap->params.vpd.cclk; /* in ps */
u32 res = t4_read_reg(adap, TP_TIMER_RESOLUTION_A);
unsigned int tre = TIMERRESOLUTION_G(res);
unsigned int dack_re = DELAYEDACKRESOLUTION_G(res);
unsigned long long tp_tick_us = (cclk_ps << tre) / 1000000; /* in us */
seq_printf(seq, "Core clock period: %s ns\n",
unit_conv(buf, sizeof(buf), cclk_ps, 1000));
seq_printf(seq, "TP timer tick: %s us\n",
unit_conv(buf, sizeof(buf), (cclk_ps << tre), 1000000));
seq_printf(seq, "TCP timestamp tick: %s us\n",
unit_conv(buf, sizeof(buf),
(cclk_ps << TIMESTAMPRESOLUTION_G(res)), 1000000));
seq_printf(seq, "DACK tick: %s us\n",
unit_conv(buf, sizeof(buf), (cclk_ps << dack_re), 1000000));
seq_printf(seq, "DACK timer: %u us\n",
((cclk_ps << dack_re) / 1000000) *
t4_read_reg(adap, TP_DACK_TIMER_A));
seq_printf(seq, "Retransmit min: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_RXT_MIN_A));
seq_printf(seq, "Retransmit max: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_RXT_MAX_A));
seq_printf(seq, "Persist timer min: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_PERS_MIN_A));
seq_printf(seq, "Persist timer max: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_PERS_MAX_A));
seq_printf(seq, "Keepalive idle timer: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_KEEP_IDLE_A));
seq_printf(seq, "Keepalive interval: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_KEEP_INTVL_A));
seq_printf(seq, "Initial SRTT: %llu us\n",
tp_tick_us * INITSRTT_G(t4_read_reg(adap, TP_INIT_SRTT_A)));
seq_printf(seq, "FINWAIT2 timer: %llu us\n",
tp_tick_us * t4_read_reg(adap, TP_FINWAIT2_TIMER_A));
return 0;
}
DEFINE_SIMPLE_DEBUGFS_FILE(clk);
/* Firmware Device Log dump. */
static const char * const devlog_level_strings[] = {
[FW_DEVLOG_LEVEL_EMERG] = "EMERG",
@ -1478,6 +1540,7 @@ int t4_setup_debugfs(struct adapter *adap)
static struct t4_debugfs_entry t4_debugfs_files[] = {
{ "cim_la", &cim_la_fops, S_IRUSR, 0 },
{ "cim_qcfg", &cim_qcfg_fops, S_IRUSR, 0 },
{ "clk", &clk_debugfs_fops, S_IRUSR, 0 },
{ "devlog", &devlog_fops, S_IRUSR, 0 },
{ "l2t", &t4_l2t_fops, S_IRUSR, 0},
{ "mps_tcam", &mps_tcam_debugfs_fops, S_IRUSR, 0 },

23
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
View File

@ -1203,12 +1203,35 @@
#define TIMERRESOLUTION_M 0xffU
#define TIMERRESOLUTION_G(x) (((x) >> TIMERRESOLUTION_S) & TIMERRESOLUTION_M)
#define TIMESTAMPRESOLUTION_S 8
#define TIMESTAMPRESOLUTION_M 0xffU
#define TIMESTAMPRESOLUTION_G(x) \
(((x) >> TIMESTAMPRESOLUTION_S) & TIMESTAMPRESOLUTION_M)
#define DELAYEDACKRESOLUTION_S 0
#define DELAYEDACKRESOLUTION_M 0xffU
#define DELAYEDACKRESOLUTION_G(x) \
(((x) >> DELAYEDACKRESOLUTION_S) & DELAYEDACKRESOLUTION_M)
#define TP_SHIFT_CNT_A 0x7dc0
#define TP_RXT_MIN_A 0x7d98
#define TP_RXT_MAX_A 0x7d9c
#define TP_PERS_MIN_A 0x7da0
#define TP_PERS_MAX_A 0x7da4
#define TP_KEEP_IDLE_A 0x7da8
#define TP_KEEP_INTVL_A 0x7dac
#define TP_INIT_SRTT_A 0x7db0
#define TP_DACK_TIMER_A 0x7db4
#define TP_FINWAIT2_TIMER_A 0x7db8
#define INITSRTT_S 0
#define INITSRTT_M 0xffffU
#define INITSRTT_G(x) (((x) >> INITSRTT_S) & INITSRTT_M)
#define PERSMAX_S 0
#define PERSMAX_M 0x3fffffffU
#define PERSMAX_V(x) ((x) << PERSMAX_S)
#define PERSMAX_G(x) (((x) >> PERSMAX_S) & PERSMAX_M)
#define SYNSHIFTMAX_S 24
#define SYNSHIFTMAX_M 0xffU