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Commit b58b6676 authored by Hariprasad Shenai's avatar Hariprasad Shenai Committed by David S. Miller
Browse files

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



Signed-off-by: default avatarHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b3bbe36a

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c

+63 −0
Original line number Diff line number Diff line
@@ -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 },

drivers/net/ethernet/chelsio/cxgb4/t4_regs.h

+23 −0
Original line number Diff line number Diff line
@@ -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