Lines Matching refs:_r
125 #define FRONT_RING_INIT(_r, _s, __size) do { \
126 (_r)->req_prod_pvt = 0; \
127 (_r)->rsp_cons = 0; \
128 (_r)->nr_ents = __RING_SIZE(_s, __size); \
129 (_r)->sring = (_s); \
132 #define BACK_RING_INIT(_r, _s, __size) do { \
133 (_r)->rsp_prod_pvt = 0; \
134 (_r)->req_cons = 0; \
135 (_r)->nr_ents = __RING_SIZE(_s, __size); \
136 (_r)->sring = (_s); \
140 #define FRONT_RING_ATTACH(_r, _s, __size) do { \
141 (_r)->sring = (_s); \
142 (_r)->req_prod_pvt = (_s)->req_prod; \
143 (_r)->rsp_cons = (_s)->rsp_prod; \
144 (_r)->nr_ents = __RING_SIZE(_s, __size); \
147 #define BACK_RING_ATTACH(_r, _s, __size) do { \
148 (_r)->sring = (_s); \
149 (_r)->rsp_prod_pvt = (_s)->rsp_prod; \
150 (_r)->req_cons = (_s)->req_prod; \
151 (_r)->nr_ents = __RING_SIZE(_s, __size); \
155 #define RING_SIZE(_r) \
156 ((_r)->nr_ents)
159 #define RING_FREE_REQUESTS(_r) \
160 (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons))
165 #define RING_FULL(_r) \
166 (RING_FREE_REQUESTS(_r) == 0)
169 #define RING_HAS_UNCONSUMED_RESPONSES(_r) \
170 ((_r)->sring->rsp_prod - (_r)->rsp_cons)
172 #define RING_HAS_UNCONSUMED_REQUESTS(_r) \
174 unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \
175 unsigned int rsp = RING_SIZE(_r) - \
176 ((_r)->req_cons - (_r)->rsp_prod_pvt); \
181 #define RING_GET_REQUEST(_r, _idx) \
182 (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))
184 #define RING_GET_RESPONSE(_r, _idx) \
185 (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp))
188 #define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \
189 (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))
191 #define RING_PUSH_REQUESTS(_r) do { \
193 (_r)->sring->req_prod = (_r)->req_prod_pvt; \
196 #define RING_PUSH_RESPONSES(_r) do { \
198 (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \
231 #define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \
232 RING_IDX __old = (_r)->sring->req_prod; \
233 RING_IDX __new = (_r)->req_prod_pvt; \
235 (_r)->sring->req_prod = __new; \
237 (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \
241 #define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \
242 RING_IDX __old = (_r)->sring->rsp_prod; \
243 RING_IDX __new = (_r)->rsp_prod_pvt; \
245 (_r)->sring->rsp_prod = __new; \
247 (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \
251 #define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \
252 (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
254 (_r)->sring->req_event = (_r)->req_cons + 1; \
256 (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
259 #define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \
260 (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
262 (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \
264 (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \