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Commit bad43792 authored by Hariprasad Shenai's avatar Hariprasad Shenai Committed by David S. Miller
Browse files

cxgb4: Add support in debugfs to dump the congestion control table 



Dump Transport Processor modules congestion control configuration

Signed-off-by: default avatarHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bf7c781d

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

+1 −0
Original line number Diff line number Diff line
@@ -1173,6 +1173,7 @@ void t4_read_cimq_cfg(struct adapter *adap, u16 *base, u16 *size, u16 *thres); 
const char *t4_get_port_type_description(enum fw_port_type port_type);

void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p);

void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log);

void t4_read_cong_tbl(struct adapter *adap, u16 incr[NMTUS][NCCTRL_WIN]);

void t4_tp_wr_bits_indirect(struct adapter *adap, unsigned int addr,

			    unsigned int mask, unsigned int val);

void t4_tp_read_la(struct adapter *adap, u64 *la_buf, unsigned int *wrptr);

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

+28 −0
Original line number Diff line number Diff line
@@ -663,6 +663,33 @@ static const struct file_operations pm_stats_debugfs_fops = { 
	.write   = pm_stats_clear

};



static int cctrl_tbl_show(struct seq_file *seq, void *v)

{

	static const char * const dec_fac[] = {

		"0.5", "0.5625", "0.625", "0.6875", "0.75", "0.8125", "0.875",

		"0.9375" };



	int i;

	u16 incr[NMTUS][NCCTRL_WIN];

	struct adapter *adap = seq->private;



	t4_read_cong_tbl(adap, incr);



	for (i = 0; i < NCCTRL_WIN; ++i) {

		seq_printf(seq, "%2d: %4u %4u %4u %4u %4u %4u %4u %4u\n", i,

			   incr[0][i], incr[1][i], incr[2][i], incr[3][i],

			   incr[4][i], incr[5][i], incr[6][i], incr[7][i]);

		seq_printf(seq, "%8u %4u %4u %4u %4u %4u %4u %4u %5u %s\n",

			   incr[8][i], incr[9][i], incr[10][i], incr[11][i],

			   incr[12][i], incr[13][i], incr[14][i], incr[15][i],

			   adap->params.a_wnd[i],

			   dec_fac[adap->params.b_wnd[i]]);

	}

	return 0;

}



DEFINE_SIMPLE_DEBUGFS_FILE(cctrl_tbl);



/* Format a value in a unit that differs from the value's native unit by the

 * given factor.

 */
@@ -1990,6 +2017,7 @@ int t4_setup_debugfs(struct adapter *adap) 
		{ "ulprx_la", &ulprx_la_fops, S_IRUSR, 0 },

		{ "sensors", &sensors_debugfs_fops, S_IRUSR, 0 },

		{ "pm_stats", &pm_stats_debugfs_fops, S_IRUSR, 0 },

		{ "cctrl", &cctrl_tbl_debugfs_fops, S_IRUSR, 0 },

#if IS_ENABLED(CONFIG_IPV6)

		{ "clip_tbl", &clip_tbl_debugfs_fops, S_IRUSR, 0 },

#endif

drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

+21 −0
Original line number Diff line number Diff line
@@ -2418,6 +2418,27 @@ void t4_read_mtu_tbl(struct adapter *adap, u16 *mtus, u8 *mtu_log) 
	}

}



/**

 *	t4_read_cong_tbl - reads the congestion control table

 *	@adap: the adapter

 *	@incr: where to store the alpha values

 *

 *	Reads the additive increments programmed into the HW congestion

 *	control table.

 */

void t4_read_cong_tbl(struct adapter *adap, u16 incr[NMTUS][NCCTRL_WIN])

{

	unsigned int mtu, w;



	for (mtu = 0; mtu < NMTUS; ++mtu)

		for (w = 0; w < NCCTRL_WIN; ++w) {

			t4_write_reg(adap, TP_CCTRL_TABLE_A,

				     ROWINDEX_V(0xffff) | (mtu << 5) | w);

			incr[mtu][w] = (u16)t4_read_reg(adap,

						TP_CCTRL_TABLE_A) & 0x1fff;

		}

}



/**

 *	t4_tp_wr_bits_indirect - set/clear bits in an indirect TP register

 *	@adap: the adapter

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

+3 −0
Original line number Diff line number Diff line
@@ -1292,6 +1292,9 @@ 
#define KEEPALIVEMAXR2_V(x) ((x) << KEEPALIVEMAXR2_S)

#define KEEPALIVEMAXR2_G(x) (((x) >> KEEPALIVEMAXR2_S) & KEEPALIVEMAXR2_M)



#define ROWINDEX_S    16

#define ROWINDEX_V(x) ((x) << ROWINDEX_S)



#define TP_CCTRL_TABLE_A	0x7ddc

#define TP_MTU_TABLE_A		0x7de4