54  * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
57  * if GID is found in AMGM, *index = index in AMGM, *prev = index of
60  * If no AMGM exists for given gid, *index = -1, *prev = index of last
65 		    u16 *hash, int *prev, int *index)  in find_mgm()  argument
88 	*index = *hash;  in find_mgm()
92 		err = mthca_READ_MGM(dev, *index, mgm_mailbox);  in find_mgm()
99 			if (*index != *hash) {  in find_mgm()
109 		*prev = *index;  in find_mgm()
110 		*index = be32_to_cpu(mgm->next_gid_index) >> 6;  in find_mgm()
111 	} while (*index);  in find_mgm()
113 	*index = -1;  in find_mgm()
126 	int index, prev;  in mthca_multicast_attach()  local
138 	err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);  in mthca_multicast_attach()
142 	if (index != -1) {  in mthca_multicast_attach()
148 		index = mthca_alloc(&dev->mcg_table.alloc);  in mthca_multicast_attach()
149 		if (index == -1) {  in mthca_multicast_attach()
155 		err = mthca_READ_MGM(dev, index, mailbox);  in mthca_multicast_attach()
176 		mthca_err(dev, "MGM at index %x is full.\n", index);  in mthca_multicast_attach()
181 	err = mthca_WRITE_MGM(dev, index, mailbox);  in mthca_multicast_attach()
197 	mgm->next_gid_index = cpu_to_be32(index << 6);  in mthca_multicast_attach()
204 	if (err && link && index != -1) {  in mthca_multicast_attach()
205 		BUG_ON(index < dev->limits.num_mgms);  in mthca_multicast_attach()
206 		mthca_free(&dev->mcg_table.alloc, index);  in mthca_multicast_attach()
220 	int prev, index;  in mthca_multicast_detach()  local
231 	err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);  in mthca_multicast_detach()
235 	if (index == -1) {  in mthca_multicast_detach()
257 	err = mthca_WRITE_MGM(dev, index, mailbox);  in mthca_multicast_detach()
279 		err = mthca_WRITE_MGM(dev, index, mailbox);  in mthca_multicast_detach()
304 		BUG_ON(index < dev->limits.num_mgms);  in mthca_multicast_detach()
305 		mthca_free(&dev->mcg_table.alloc, index);  in mthca_multicast_detach()