Author: markj
Date: Thu Nov 7 23:36:25 2019
New Revision: 354506
URL: https://svnweb.freebsd.org/changeset/base/354506
Log:
iwm: Explicitly enable MSI on newer chipsets.
9000-series chips implement support for MSI-X interrupts and disable MSI
by default.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/dev/iwm/if_iwm_pcie_trans.c
head/sys/dev/iwm/if_iwmreg.h
Modified: head/sys/dev/iwm/if_iwm_pcie_trans.c
==============================================================================
--- head/sys/dev/iwm/if_iwm_pcie_trans.c Thu Nov 7 23:36:10 2019
(r354505)
+++ head/sys/dev/iwm/if_iwm_pcie_trans.c Thu Nov 7 23:36:25 2019
(r354506)
@@ -616,6 +616,10 @@ iwm_start_hw(struct iwm_softc *sc)
if ((error = iwm_apm_init(sc)) != 0)
return error;
+ /* On newer chipsets MSI is disabled by default. */
+ if (sc->cfg->mqrx_supported)
+ iwm_write_prph(sc, IWM_UREG_CHICK, IWM_UREG_CHICK_MSI_ENABLE);
+
iwm_enable_rfkill_int(sc);
iwm_check_rfkill(sc);
Modified: head/sys/dev/iwm/if_iwmreg.h
==============================================================================
--- head/sys/dev/iwm/if_iwmreg.h Thu Nov 7 23:36:10 2019
(r354505)
+++ head/sys/dev/iwm/if_iwmreg.h Thu Nov 7 23:36:25 2019
(r354506)
@@ -457,6 +457,10 @@ enum iwm_secure_boot_status_reg {
#define IWM_LMPM_CHICK 0xa01ff8
#define IWM_LMPM_CHICK_EXTENDED_ADDR_SPACE 0x01
+#define IWM_UREG_CHICK 0xa05c00
+#define IWM_UREG_CHICK_MSI_ENABLE 0x01000000
+#define IWM_UREG_CHICK_MSIX_ENABLE 0x02000000
+
#define IWM_FH_TCSR_0_REG0 (0x1D00)
/*
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