16  *      - Redistributions of source code must retain the above
20  *      - Redistributions in binary form must reproduce the above
53 	s->smt_size = smt_size;  in t4_init_smt()
54 	rwlock_init(&s->lock);  in t4_init_smt()
55 	for (i = 0; i < s->smt_size; ++i) {  in t4_init_smt()
56 		s->smtab[i].idx = i;  in t4_init_smt()
57 		s->smtab[i].state = SMT_STATE_UNUSED;  in t4_init_smt()
58 		eth_zero_addr(s->smtab[i].src_mac);  in t4_init_smt()
59 		spin_lock_init(&s->smtab[i].lock);  in t4_init_smt()
60 		s->smtab[i].refcnt = 0;  in t4_init_smt()
68 	struct smt_entry *e, *end;  in find_or_alloc_smte()  local
70 	for (e = &s->smtab[0], end = &s->smtab[s->smt_size]; e != end; ++e) {  in find_or_alloc_smte()
71 		if (e->refcnt == 0) {  in find_or_alloc_smte()
73 				first_free = e;  in find_or_alloc_smte()
75 			if (e->state == SMT_STATE_SWITCHING) {  in find_or_alloc_smte()
77 				 * re-use it ?  in find_or_alloc_smte()
79 				if (memcmp(e->src_mac, smac, ETH_ALEN) == 0)  in find_or_alloc_smte()
86 		e = first_free;  in find_or_alloc_smte()
92 	e->state = SMT_STATE_UNUSED;  in find_or_alloc_smte()
95 	return e;  in find_or_alloc_smte()
98 static void t4_smte_free(struct smt_entry *e)  in t4_smte_free()  argument
100 	if (e->refcnt == 0) {  /* hasn't been recycled */  in t4_smte_free()
101 		e->state = SMT_STATE_UNUSED;  in t4_smte_free()
106  * cxgb4_smt_release - Release SMT entry
107  * @e: smt entry to release
111 void cxgb4_smt_release(struct smt_entry *e)  in cxgb4_smt_release()  argument
113 	spin_lock_bh(&e->lock);  in cxgb4_smt_release()
114 	if ((--e->refcnt) == 0)  in cxgb4_smt_release()
115 		t4_smte_free(e);  in cxgb4_smt_release()
116 	spin_unlock_bh(&e->lock);  in cxgb4_smt_release()
123 	struct smt_data *s = adap->smt;  in do_smt_write_rpl()
125 	if (unlikely(rpl->status != CPL_ERR_NONE)) {  in do_smt_write_rpl()
126 		struct smt_entry *e = &s->smtab[smtidx];  in do_smt_write_rpl()  local
128 		dev_err(adap->pdev_dev,  in do_smt_write_rpl()
130 			rpl->status, smtidx);  in do_smt_write_rpl()
131 		spin_lock(&e->lock);  in do_smt_write_rpl()
132 		e->state = SMT_STATE_ERROR;  in do_smt_write_rpl()
133 		spin_unlock(&e->lock);  in do_smt_write_rpl()
138 static int write_smt_entry(struct adapter *adapter, struct smt_entry *e)  in write_smt_entry()  argument
141 	struct smt_data *s = adapter->smt;  in write_smt_entry()
147 	if (CHELSIO_CHIP_VERSION(adapter->params.chip) <= CHELSIO_T5) {  in write_smt_entry()
151 			return -ENOMEM;  in write_smt_entry()
161 		row = (e->idx >> 1);  in write_smt_entry()
162 		if (e->idx & 1) {  in write_smt_entry()
163 			req->pfvf1 = 0x0;  in write_smt_entry()
164 			memcpy(req->src_mac1, e->src_mac, ETH_ALEN);  in write_smt_entry()
167 			 * at prev index from smt-tab.  in write_smt_entry()
169 			req->pfvf0 = 0x0;  in write_smt_entry()
170 			memcpy(req->src_mac0, s->smtab[e->idx - 1].src_mac,  in write_smt_entry()
173 			req->pfvf0 = 0x0;  in write_smt_entry()
174 			memcpy(req->src_mac0, e->src_mac, ETH_ALEN);  in write_smt_entry()
177 			 * at next index from smt-tab  in write_smt_entry()
179 			req->pfvf1 = 0x0;  in write_smt_entry()
180 			memcpy(req->src_mac1, s->smtab[e->idx + 1].src_mac,  in write_smt_entry()
187 			return -ENOMEM;  in write_smt_entry()
193 		/* fill pfvf0/src_mac0 from smt-tab */  in write_smt_entry()
194 		req->pfvf0 = 0x0;  in write_smt_entry()
195 		memcpy(req->src_mac0, s->smtab[e->idx].src_mac, ETH_ALEN);  in write_smt_entry()
196 		row = e->idx;  in write_smt_entry()
200 		htonl(MK_OPCODE_TID(CPL_SMT_WRITE_REQ, e->idx |  in write_smt_entry()
201 				    TID_QID_V(adapter->sge.fw_evtq.abs_id)));  in write_smt_entry()
202 	req->params = htonl(SMTW_NORPL_V(0) |  in write_smt_entry()
212 	struct smt_data *s = adap->smt;  in t4_smt_alloc_switching()
213 	struct smt_entry *e;  in t4_smt_alloc_switching()  local
215 	write_lock_bh(&s->lock);  in t4_smt_alloc_switching()
216 	e = find_or_alloc_smte(s, smac);  in t4_smt_alloc_switching()
217 	if (e) {  in t4_smt_alloc_switching()
218 		spin_lock(&e->lock);  in t4_smt_alloc_switching()
219 		if (!e->refcnt) {  in t4_smt_alloc_switching()
220 			e->refcnt = 1;  in t4_smt_alloc_switching()
221 			e->state = SMT_STATE_SWITCHING;  in t4_smt_alloc_switching()
222 			e->pfvf = pfvf;  in t4_smt_alloc_switching()
223 			memcpy(e->src_mac, smac, ETH_ALEN);  in t4_smt_alloc_switching()
224 			write_smt_entry(adap, e);  in t4_smt_alloc_switching()
226 			++e->refcnt;  in t4_smt_alloc_switching()
228 		spin_unlock(&e->lock);  in t4_smt_alloc_switching()
230 	write_unlock_bh(&s->lock);  in t4_smt_alloc_switching()
231 	return e;  in t4_smt_alloc_switching()
235  * cxgb4_smt_alloc_switching - Allocates an SMT entry for switch filters.