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cxgbe(4): Add a knob to request that clocks be gated on suspend.

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MFC after:	3 months
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2022-08-16 00:48:21 -07:00
parent a7d081a8ce
commit a8dc67388a
1 changed files with 10 additions and 0 deletions
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10
sys/dev/cxgbe/t4_main.c
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@ -626,6 +626,10 @@ static int t4_reset_on_fatal_err = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, reset_on_fatal_err, CTLFLAG_RWTUN,
&t4_reset_on_fatal_err, 0, "reset adapter on fatal errors");
static int t4_clock_gate_on_suspend = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, clock_gate_on_suspend, CTLFLAG_RWTUN,
&t4_clock_gate_on_suspend, 0, "gate the clock on suspend");
static int t4_tx_vm_wr = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, tx_vm_wr, CTLFLAG_RWTUN, &t4_tx_vm_wr, 0,
"Use VM work requests to transmit packets.");
@ -1996,6 +2000,12 @@ t4_suspend(device_t dev)
sc->reset_thread = NULL;
mtx_unlock(&sc->reg_lock);
if (t4_clock_gate_on_suspend) {
t4_set_reg_field(sc, A_PMU_PART_CG_PWRMODE, F_MA_PART_CGEN |
F_LE_PART_CGEN | F_EDC1_PART_CGEN | F_EDC0_PART_CGEN |
F_TP_PART_CGEN | F_PDP_PART_CGEN | F_SGE_PART_CGEN, 0);
}
CH_ALERT(sc, "suspend completed.\n");
done:
end_synchronized_op(sc, 0);