Lines Matching refs:_r
139 #define FRONT_RING_ATTACH(_r, _s, _i, __size) do { \ argument
140 (_r)->req_prod_pvt = (_i); \
141 (_r)->rsp_cons = (_i); \
142 (_r)->nr_ents = __RING_SIZE(_s, __size); \
143 (_r)->sring = (_s); \
146 #define FRONT_RING_INIT(_r, _s, __size) FRONT_RING_ATTACH(_r, _s, 0, __size) argument
153 #define BACK_RING_ATTACH(_r, _s, _i, __size) do { \ argument
154 (_r)->rsp_prod_pvt = (_i); \
155 (_r)->req_cons = (_i); \
156 (_r)->nr_ents = __RING_SIZE(_s, __size); \
157 (_r)->sring = (_s); \
160 #define BACK_RING_INIT(_r, _s, __size) BACK_RING_ATTACH(_r, _s, 0, __size) argument
163 #define RING_SIZE(_r) \ argument
164 ((_r)->nr_ents)
167 #define RING_FREE_REQUESTS(_r) \ argument
168 (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons))
173 #define RING_FULL(_r) \ argument
174 (RING_FREE_REQUESTS(_r) == 0)
177 #define XEN_RING_NR_UNCONSUMED_RESPONSES(_r) \ argument
178 ((_r)->sring->rsp_prod - (_r)->rsp_cons)
180 #define XEN_RING_NR_UNCONSUMED_REQUESTS(_r) ({ \ argument
181 unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \
182 unsigned int rsp = RING_SIZE(_r) - \
183 ((_r)->req_cons - (_r)->rsp_prod_pvt); \
187 #define RING_HAS_UNCONSUMED_RESPONSES(_r) \ argument
188 (!!XEN_RING_NR_UNCONSUMED_RESPONSES(_r))
189 #define RING_HAS_UNCONSUMED_REQUESTS(_r) \ argument
190 (!!XEN_RING_NR_UNCONSUMED_REQUESTS(_r))
193 #define RING_GET_REQUEST(_r, _idx) \ argument
194 (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))
196 #define RING_GET_RESPONSE(_r, _idx) \ argument
197 (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp))
217 #define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ argument
218 (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))
221 #define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ argument
222 (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r))
225 #define RING_RESPONSE_PROD_OVERFLOW(_r, _prod) \ argument
226 (((_prod) - (_r)->rsp_cons) > RING_SIZE(_r))
228 #define RING_PUSH_REQUESTS(_r) do { \ argument
230 (_r)->sring->req_prod = (_r)->req_prod_pvt; \
233 #define RING_PUSH_RESPONSES(_r) do { \ argument
235 (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \
268 #define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ argument
269 RING_IDX __old = (_r)->sring->req_prod; \
270 RING_IDX __new = (_r)->req_prod_pvt; \
272 (_r)->sring->req_prod = __new; \
274 (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \
278 #define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \ argument
279 RING_IDX __old = (_r)->sring->rsp_prod; \
280 RING_IDX __new = (_r)->rsp_prod_pvt; \
282 (_r)->sring->rsp_prod = __new; \
284 (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \
288 #define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \ argument
289 (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
291 (_r)->sring->req_event = (_r)->req_cons + 1; \
293 (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
296 #define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \ argument
297 (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
299 (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \
301 (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \