io/softmac/softmac_fp.c

31  * When the softmac fast-path is used, a dedicated lower-stream
44  * softmac fast-path must be disabled to support GLDv3 VNIC functionality.
50  * By default, the softmac fast-path mode will be used to assure the
51  * performance; MAC clients will be able to request to disable the softmac
53  * the system will fallback to the slow-path softmac data-path model.
56  * The details of the softmac data fast-path model is stated as below
58  * 1. When a stream is opened on a softMAC, the softmac module will takes
61  * 2. For IP/ARP streams over a softMAC, softmac data fast-path will be
63  *    explicitly. The softmac module first identifies an IP/ARP stream
68  * 3. When the softmac fast-path is used, an dedicated lower-stream will
75  * 4. When the softmac data fast-path is disabled by a MAC client (e.g.,
88  * 1) To switch the softmac data-path mode (between fast-path and slow-path),
89  *    softmac will first send a DL_NOTE_REPLUMB DL_NOTIFY_IND message
105  * 3) When softmac receives the DL_NOTE_REPLUMB_DONE message, it either
107  *    data-path mode the softMAC switches to), and change the softmac
108  *    data-path mode. From then on, softmac will process all the succeeding
307 	softmac_t		*softmac = sup->su_softmac;
321 	 * Direct capability negotiation interface between IP and softmac
332 	if (softmac->smac_capab_flags & MAC_CAPAB_HCKSUM) {
341 	if (!(softmac->smac_capab_flags & MAC_CAPAB_NO_ZCOPY)) {
347 	if (softmac->smac_mdt) {
408 		hcksum.hcksum_txflags = softmac->smac_hcksum_txflags;
449 		mdt.mdt_hdr_head = softmac->smac_mdt_capab.mdt_hdr_head;
450 		mdt.mdt_hdr_tail = softmac->smac_mdt_capab.mdt_hdr_tail;
451 		mdt.mdt_max_pld = softmac->smac_mdt_capab.mdt_max_pld;
452 		mdt.mdt_span_limit = softmac->smac_mdt_capab.mdt_span_limit;
550 	softmac_t	*softmac = sup->su_softmac;
587 	 * Check whether this softmac is already marked as exclusively used,
590 	mutex_enter(&softmac->smac_active_mutex);
591 	if (softmac->smac_active) {
592 		mutex_exit(&softmac->smac_active_mutex);
596 	softmac->smac_nactive++;
598 	mutex_exit(&softmac->smac_active_mutex);
614 	softmac_t	*softmac = sup->su_softmac;
653 	mutex_enter(&softmac->smac_active_mutex);
655 		ASSERT(!softmac->smac_active);
656 		softmac->smac_nactive--;
659 	mutex_exit(&softmac->smac_active_mutex);
671 	softmac_t *softmac = sup->su_softmac;
700 		mutex_enter(&softmac->smac_fp_mutex);
702 		expected_mode = DATAPATH_MODE(softmac);
705 		list_insert_head(&softmac->smac_sup_list, sup);
706 		mutex_exit(&softmac->smac_fp_mutex);
737 			 * and queued by the softmac itself, when the
836  * This thread is started when the softmac module is first loaded.
915 	softmac_t	*softmac = sup->su_softmac;
919 	err = softmac_lower_setup(softmac, sup, &slp);
1058 	softmac_t	*softmac = arg;
1060 	mutex_enter(&softmac->smac_active_mutex);
1061 	if (softmac->smac_nactive != 0) {
1062 		mutex_exit(&softmac->smac_active_mutex);
1065 	softmac->smac_active = B_TRUE;
1066 	mutex_exit(&softmac->smac_active_mutex);
1073 	softmac_t	*softmac = arg;
1075 	mutex_enter(&softmac->smac_active_mutex);
1076 	ASSERT(softmac->smac_active && (softmac->smac_nactive == 0));
1077 	softmac->smac_active = B_FALSE;
1078 	mutex_exit(&softmac->smac_active_mutex);
1082  * Disable/reenable fastpath on given softmac. This request could come from a
1086 softmac_datapath_switch(softmac_t *softmac, boolean_t disable, boolean_t admin)
1095 	mutex_enter(&softmac->smac_fp_mutex);
1097 	current_mode = DATAPATH_MODE(softmac);
1099 		if (softmac->smac_fastpath_admin_disabled == disable) {
1100 			mutex_exit(&softmac->smac_fp_mutex);
1103 		softmac->smac_fastpath_admin_disabled = disable;
1105 		softmac->smac_fp_disable_clients++;
1107 		ASSERT(softmac->smac_fp_disable_clients != 0);
1108 		softmac->smac_fp_disable_clients--;
1111 	expected_mode = DATAPATH_MODE(softmac);
1113 		mutex_exit(&softmac->smac_fp_mutex);
1119 	 * this softmac is expected from last request, enqueue the data-path
1129 	for (sup = list_head(&softmac->smac_sup_list); sup != NULL;
1130 	    sup = list_next(&softmac->smac_sup_list, sup)) {
1181 	for (sup = list_head(&softmac->smac_sup_list); sup != NULL;
1182 	    sup = list_next(&softmac->smac_sup_list, sup)) {
1198 	mutex_exit(&softmac->smac_fp_mutex);
1204 		softmac->smac_fastpath_admin_disabled = !disable;
1206 		softmac->smac_fp_disable_clients--;
1208 		softmac->smac_fp_disable_clients++;
1211 	mutex_exit(&softmac->smac_fp_mutex);
1237 	softmac_t		*softmac = sup->su_softmac;
1240 	mutex_enter(&softmac->smac_fp_mutex);
1246 		list_remove(&softmac->smac_sup_list, sup);
1257 	mutex_exit(&softmac->smac_fp_mutex);
1267 	softmac_t		*softmac = sup->su_softmac;
1271 	mutex_enter(&softmac->smac_fp_mutex);
1278 		mutex_exit(&softmac->smac_fp_mutex);
1283 	mutex_exit(&softmac->smac_fp_mutex);