632 xvdi_reinit_ring(dev_info_t *dip, grant_ref_t *gref, xendev_ring_t *ringp)  in xvdi_reinit_ring()  argument
637 	ASSERT((ringp != NULL) && (ringp->xr_paddr != 0));  in xvdi_reinit_ring()
638 	rpaddr = ringp->xr_paddr;  in xvdi_reinit_ring()
641 	gnttab_grant_foreign_access_ref(ringp->xr_gref, xvdi_get_oeid(dip),  in xvdi_reinit_ring()
643 	*gref = ringp->xr_gref;  in xvdi_reinit_ring()
646 	xvdi_ring_init_sring(ringp);  in xvdi_reinit_ring()
647 	xvdi_ring_init_front_ring(ringp, ringp->xr_sring.fr.nr_ents,  in xvdi_reinit_ring()
648 	    ringp->xr_entry_size);  in xvdi_reinit_ring()
2050 #define	GET_RING_SIZE(_ringp)	RING_SIZE(FRONT_RING(ringp))
2059 xvdi_ring_avail_slots(xendev_ring_t *ringp)  in xvdi_ring_avail_slots()  argument
2064 	if (ringp->xr_frontend) {  in xvdi_ring_avail_slots()
2065 		frp = FRONT_RING(ringp);  in xvdi_ring_avail_slots()
2066 		return (GET_RING_SIZE(ringp) -  in xvdi_ring_avail_slots()
2069 		brp = BACK_RING(ringp);  in xvdi_ring_avail_slots()
2070 		return (GET_RING_SIZE(ringp) -  in xvdi_ring_avail_slots()
2076 xvdi_ring_has_unconsumed_requests(xendev_ring_t *ringp)  in xvdi_ring_has_unconsumed_requests()  argument
2080 	ASSERT(!ringp->xr_frontend);  in xvdi_ring_has_unconsumed_requests()
2081 	brp = BACK_RING(ringp);  in xvdi_ring_has_unconsumed_requests()
2083 	    ddi_get32(ringp->xr_acc_hdl, &brp->sring->req_prod)) &&  in xvdi_ring_has_unconsumed_requests()
2088 xvdi_ring_has_incomp_request(xendev_ring_t *ringp)  in xvdi_ring_has_incomp_request()  argument
2092 	ASSERT(ringp->xr_frontend);  in xvdi_ring_has_incomp_request()
2093 	frp = FRONT_RING(ringp);  in xvdi_ring_has_incomp_request()
2095 	    ddi_get32(ringp->xr_acc_hdl, &frp->sring->rsp_prod));  in xvdi_ring_has_incomp_request()
2099 xvdi_ring_has_unconsumed_responses(xendev_ring_t *ringp)  in xvdi_ring_has_unconsumed_responses()  argument
2103 	ASSERT(ringp->xr_frontend);  in xvdi_ring_has_unconsumed_responses()
2104 	frp = FRONT_RING(ringp);  in xvdi_ring_has_unconsumed_responses()
2106 	    ddi_get32(ringp->xr_acc_hdl, &frp->sring->rsp_prod));  in xvdi_ring_has_unconsumed_responses()
2111 xvdi_ring_get_request(xendev_ring_t *ringp)  in xvdi_ring_get_request()  argument
2116 	if (ringp->xr_frontend) {  in xvdi_ring_get_request()
2118 		frp = FRONT_RING(ringp);  in xvdi_ring_get_request()
2120 			return (GET_RING_ENTRY_FE(ringp, frp->req_prod_pvt++));  in xvdi_ring_get_request()
2125 		brp = BACK_RING(ringp);  in xvdi_ring_get_request()
2127 		if (xvdi_ring_has_unconsumed_requests(ringp))  in xvdi_ring_get_request()
2128 			return (GET_RING_ENTRY_BE(ringp, brp->req_cons++));  in xvdi_ring_get_request()
2130 			ddi_put32(ringp->xr_acc_hdl, &brp->sring->req_event,  in xvdi_ring_get_request()
2133 			if (xvdi_ring_has_unconsumed_requests(ringp))  in xvdi_ring_get_request()
2134 				return (GET_RING_ENTRY_BE(ringp,  in xvdi_ring_get_request()
2143 xvdi_ring_push_request(xendev_ring_t *ringp)  in xvdi_ring_push_request()  argument
2149 	ASSERT(ringp->xr_frontend);  in xvdi_ring_push_request()
2152 	frp = FRONT_RING(ringp);  in xvdi_ring_push_request()
2153 	old = ddi_get32(ringp->xr_acc_hdl, &frp->sring->req_prod);  in xvdi_ring_push_request()
2155 	ddi_put32(ringp->xr_acc_hdl, &frp->sring->req_prod, new);  in xvdi_ring_push_request()
2157 	reqevt = ddi_get32(ringp->xr_acc_hdl, &frp->sring->req_event);  in xvdi_ring_push_request()
2163 xvdi_ring_get_response(xendev_ring_t *ringp)  in xvdi_ring_get_response()  argument
2168 	if (!ringp->xr_frontend) {  in xvdi_ring_get_response()
2170 		brp = BACK_RING(ringp);  in xvdi_ring_get_response()
2171 		return (GET_RING_ENTRY_BE(ringp, brp->rsp_prod_pvt++));  in xvdi_ring_get_response()
2174 		frp = FRONT_RING(ringp);  in xvdi_ring_get_response()
2176 		if (xvdi_ring_has_unconsumed_responses(ringp))  in xvdi_ring_get_response()
2177 			return (GET_RING_ENTRY_FE(ringp, frp->rsp_cons++));  in xvdi_ring_get_response()
2179 			ddi_put32(ringp->xr_acc_hdl, &frp->sring->rsp_event,  in xvdi_ring_get_response()
2182 			if (xvdi_ring_has_unconsumed_responses(ringp))  in xvdi_ring_get_response()
2183 				return (GET_RING_ENTRY_FE(ringp,  in xvdi_ring_get_response()
2192 xvdi_ring_push_response(xendev_ring_t *ringp)  in xvdi_ring_push_response()  argument
2198 	ASSERT(!ringp->xr_frontend);  in xvdi_ring_push_response()
2201 	brp = BACK_RING(ringp);  in xvdi_ring_push_response()
2202 	old = ddi_get32(ringp->xr_acc_hdl, &brp->sring->rsp_prod);  in xvdi_ring_push_response()
2204 	ddi_put32(ringp->xr_acc_hdl, &brp->sring->rsp_prod, new);  in xvdi_ring_push_response()
2206 	rspevt = ddi_get32(ringp->xr_acc_hdl, &brp->sring->rsp_event);  in xvdi_ring_push_response()
2211 xvdi_ring_init_sring(xendev_ring_t *ringp)  in xvdi_ring_init_sring()  argument
2217 	xsrp = (comif_sring_t *)ringp->xr_vaddr;  in xvdi_ring_init_sring()
2218 	acchdl = ringp->xr_acc_hdl;  in xvdi_ring_init_sring()
2230 xvdi_ring_init_front_ring(xendev_ring_t *ringp, size_t nentry, size_t entrysize)  in xvdi_ring_init_front_ring()  argument
2234 	xfrp = &ringp->xr_sring.fr;  in xvdi_ring_init_front_ring()
2238 	xfrp->sring = (comif_sring_t *)ringp->xr_vaddr;  in xvdi_ring_init_front_ring()
2240 	ringp->xr_frontend = 1;  in xvdi_ring_init_front_ring()
2241 	ringp->xr_entry_size = entrysize;  in xvdi_ring_init_front_ring()
2246 xvdi_ring_init_back_ring(xendev_ring_t *ringp, size_t nentry, size_t entrysize)  in xvdi_ring_init_back_ring()  argument
2250 	xbrp = &ringp->xr_sring.br;  in xvdi_ring_init_back_ring()
2254 	xbrp->sring = (comif_sring_t *)ringp->xr_vaddr;  in xvdi_ring_init_back_ring()
2256 	ringp->xr_frontend = 0;  in xvdi_ring_init_back_ring()
2257 	ringp->xr_entry_size = entrysize;  in xvdi_ring_init_back_ring()