Add a field to struct cmn_unit to hold a pointer to the driver's softc.

sys/dev/hea/eni.h

@@ -499,5 +499,6 @@ typedef	struct eni_unit		Eni_unit;
 #define	eu_closevcc	eu_cmn.cu_closevcc
 #define	eu_output	eu_cmn.cu_output
 #define	eu_config	eu_cmn.cu_config
+#define	eu_softc	eu_cmn.cu_softc
 
 #endif	/* _ENI_ENI_H */

sys/dev/hea/hea_freebsd.c

@@ -184,6 +184,7 @@ hea_attach (device_t dev)
 	eup->eu_output = eni_output;
 
 	eup->eu_pcitag = dev;
+	eup->eu_softc = (void *)sc;
 
 	/*
 	 * Map memory structures into adapter space

sys/dev/hfa/fore_var.h

@@ -245,6 +245,7 @@ typedef struct fore_unit	Fore_unit;
 #define	fu_closevcc	fu_cmn.cu_closevcc
 #define	fu_output	fu_cmn.cu_output
 #define	fu_config	fu_cmn.cu_config
+#define	fu_softc	fu_cmn.cu_softc
 
 /*
  * Device flags (in addition to CUF_* flags)

sys/dev/hfa/hfa_freebsd.c

@@ -176,6 +176,7 @@ hfa_attach (device_t dev)
 	fup->fu_openvcc = fore_openvcc;
 	fup->fu_closevcc = fore_closevcc;
 	fup->fu_output = fore_output;
+	fup->fu_softc = (void *)sc;
 
 	callout_handle_init(&fup->fu_thandle);
 

sys/dev/idt/idt_harp.c

@@ -109,6 +109,7 @@
 #define	iu_closevcc	iu_cmn.cu_closevcc
 #define	iu_output	iu_cmn.cu_output
 #define	iu_config	iu_cmn.cu_config
+#define	iu_softc	iu_cmn.cu_softc
 
 /*
  * ATM Interface services
@@ -313,6 +314,7 @@ idt_harp_init(nicstar_reg_t *idt)
 	idt->iu_output = idt_output;
 	idt->iu_vcc_zone = idt_vcc_zone;
 	idt->iu_nif_zone = idt_nif_zone;
+	idt->iu_softc = (void *)idt;
 
 	/*
 	 * Copy serial number into config space

sys/netatm/atm_if.h

@@ -279,6 +279,8 @@ struct cmn_unit {
 				(struct cmn_unit *, Cmn_vcc *, KBuffer *);
 
 	Atm_config	cu_config;	/* Device configuration data */
+
+	void *		cu_softc;	/* pointer to driver state */
 };
 typedef struct cmn_unit	Cmn_unit;