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cxgbe(4): Allow the TOE timer tunables to be set with microsecond

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precision.  These timers are already displayed in microseconds in the
sysctl MIB.  Add variables to track these tunables while here.

MFC after:	3 days
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2017-08-04 15:57:10 +00:00
parent 73979478cc
commit 019c1a0111
2 changed files with 75 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sys/dev/cxgbe/common/common.h
View File

@ -501,13 +501,10 @@ static inline unsigned int dack_ticks_to_usec(const struct adapter *adap,
return (ticks << adap->params.tp.dack_re) / core_ticks_per_usec(adap);
}
static inline u_int ms_to_tcp_ticks(const struct adapter *adap, u_int ms)
static inline u_int us_to_tcp_ticks(const struct adapter *adap, u_long us)
{
u_long l;
l = (u_long)ms * adap->params.vpd.cclk >> adap->params.tp.tre;
return (l);
return (us * adap->params.vpd.cclk / 1000 >> adap->params.tp.tre);
}
void t4_set_reg_field(struct adapter *adap, unsigned int addr, u32 mask, u32 val);

93
sys/dev/cxgbe/t4_main.c
View File

@ -294,6 +294,51 @@ TUNABLE_INT("hw.cxgbe.nofldtxq_vi", &t4_nofldtxq_vi);
#define NOFLDRXQ_VI 1
static int t4_nofldrxq_vi = -NOFLDRXQ_VI;
TUNABLE_INT("hw.cxgbe.nofldrxq_vi", &t4_nofldrxq_vi);
/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_keepalive_idle = 0;
TUNABLE_ULONG("hw.cxgbe.toe.keepalive_idle", &t4_toe_keepalive_idle);
/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_keepalive_interval = 0;
TUNABLE_ULONG("hw.cxgbe.toe.keepalive_interval", &t4_toe_keepalive_interval);
/* 0 means chip/fw default, non-zero number is # of keepalives before abort */
static int t4_toe_keepalive_count = 0;
TUNABLE_INT("hw.cxgbe.toe.keepalive_count", &t4_toe_keepalive_count);
/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_rexmt_min = 0;
TUNABLE_ULONG("hw.cxgbe.toe.rexmt_min", &t4_toe_rexmt_min);
/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_rexmt_max = 0;
TUNABLE_ULONG("hw.cxgbe.toe.rexmt_max", &t4_toe_rexmt_max);
/* 0 means chip/fw default, non-zero number is # of rexmt before abort */
static int t4_toe_rexmt_count = 0;
TUNABLE_INT("hw.cxgbe.toe.rexmt_count", &t4_toe_rexmt_count);
/* -1 means chip/fw default, other values are raw backoff values to use */
static int t4_toe_rexmt_backoff[16] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.0", &t4_toe_rexmt_backoff[0]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.1", &t4_toe_rexmt_backoff[1]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.2", &t4_toe_rexmt_backoff[2]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.3", &t4_toe_rexmt_backoff[3]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.4", &t4_toe_rexmt_backoff[4]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.5", &t4_toe_rexmt_backoff[5]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.6", &t4_toe_rexmt_backoff[6]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.7", &t4_toe_rexmt_backoff[7]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.8", &t4_toe_rexmt_backoff[8]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.9", &t4_toe_rexmt_backoff[9]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.10", &t4_toe_rexmt_backoff[10]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.11", &t4_toe_rexmt_backoff[11]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.12", &t4_toe_rexmt_backoff[12]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.13", &t4_toe_rexmt_backoff[13]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.14", &t4_toe_rexmt_backoff[14]);
TUNABLE_INT("hw.cxgbe.toe.rexmt_backoff.15", &t4_toe_rexmt_backoff[15]);
#endif
#ifdef DEV_NETMAP
@ -3611,62 +3656,70 @@ static int
set_params__post_init(struct adapter *sc)
{
uint32_t param, val;
#ifdef TCP_OFFLOAD
int i, v, shift;
char s[32];
#endif
/* ask for encapsulated CPLs */
param = FW_PARAM_PFVF(CPLFW4MSG_ENCAP);
val = 1;
(void)t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
#ifdef TCP_OFFLOAD
/*
* Override the TOE timers with user provided tunables. This is not the
* recommended way to change the timers (the firmware config file is) so
* these tunables are not documented.
*
* All the timer tunables are in milliseconds.
* All the timer tunables are in microseconds.
*/
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.keepalive_idle", &v)) {
if (t4_toe_keepalive_idle != 0) {
v = us_to_tcp_ticks(sc, t4_toe_keepalive_idle);
v &= M_KEEPALIVEIDLE;
t4_set_reg_field(sc, A_TP_KEEP_IDLE,
V_KEEPALIVEIDLE(M_KEEPALIVEIDLE),
V_KEEPALIVEIDLE(ms_to_tcp_ticks(sc, v)));
V_KEEPALIVEIDLE(M_KEEPALIVEIDLE), V_KEEPALIVEIDLE(v));
}
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.keepalive_interval", &v)) {
if (t4_toe_keepalive_interval != 0) {
v = us_to_tcp_ticks(sc, t4_toe_keepalive_interval);
v &= M_KEEPALIVEINTVL;
t4_set_reg_field(sc, A_TP_KEEP_INTVL,
V_KEEPALIVEINTVL(M_KEEPALIVEINTVL),
V_KEEPALIVEINTVL(ms_to_tcp_ticks(sc, v)));
V_KEEPALIVEINTVL(M_KEEPALIVEINTVL), V_KEEPALIVEINTVL(v));
}
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.keepalive_count", &v)) {
v &= M_KEEPALIVEMAXR1;
if (t4_toe_keepalive_count != 0) {
v = t4_toe_keepalive_count & M_KEEPALIVEMAXR2;
t4_set_reg_field(sc, A_TP_SHIFT_CNT,
V_KEEPALIVEMAXR1(M_KEEPALIVEMAXR1) |
V_KEEPALIVEMAXR2(M_KEEPALIVEMAXR2),
V_KEEPALIVEMAXR1(1) | V_KEEPALIVEMAXR2(v));
}
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.rexmt_min", &v)) {
if (t4_toe_rexmt_min != 0) {
v = us_to_tcp_ticks(sc, t4_toe_rexmt_min);
v &= M_RXTMIN;
t4_set_reg_field(sc, A_TP_RXT_MIN,
V_RXTMIN(M_RXTMIN), V_RXTMIN(ms_to_tcp_ticks(sc, v)));
V_RXTMIN(M_RXTMIN), V_RXTMIN(v));
}
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.rexmt_max", &v)) {
if (t4_toe_rexmt_max != 0) {
v = us_to_tcp_ticks(sc, t4_toe_rexmt_max);
v &= M_RXTMAX;
t4_set_reg_field(sc, A_TP_RXT_MAX,
V_RXTMAX(M_RXTMAX), V_RXTMAX(ms_to_tcp_ticks(sc, v)));
V_RXTMAX(M_RXTMAX), V_RXTMAX(v));
}
if (TUNABLE_INT_FETCH("hw.cxgbe.toe.rexmt_count", &v)) {
v &= M_RXTSHIFTMAXR1;
if (t4_toe_rexmt_count != 0) {
v = t4_toe_rexmt_count & M_RXTSHIFTMAXR2;
t4_set_reg_field(sc, A_TP_SHIFT_CNT,
V_RXTSHIFTMAXR1(M_RXTSHIFTMAXR1) |
V_RXTSHIFTMAXR2(M_RXTSHIFTMAXR2),
V_RXTSHIFTMAXR1(1) | V_RXTSHIFTMAXR2(v));
}
for (i = 0; i < 16; i++) {
snprintf(s, sizeof(s), "hw.cxgbe.toe.rexmt_backoff.%d", i);
if (TUNABLE_INT_FETCH(s, &v)) {
v &= M_TIMERBACKOFFINDEX0;
for (i = 0; i < nitems(t4_toe_rexmt_backoff); i++) {
if (t4_toe_rexmt_backoff[i] != -1) {
v = t4_toe_rexmt_backoff[i] & M_TIMERBACKOFFINDEX0;
shift = (i & 3) << 3;
t4_set_reg_field(sc, A_TP_TCP_BACKOFF_REG0 + (i & ~3),
M_TIMERBACKOFFINDEX0 << shift, v << shift);
}
}
#endif
return (0);
}