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

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Dump Transport Processor modules congestion control configuration

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2015-02-06 19:32:55 +05:30 committed by David S. Miller
parent bf7c781d57
commit bad4379263
4 changed files with 53 additions and 0 deletions
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1
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -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);

28
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
View File

@ -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

21
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -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

3
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
View File

@ -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