45 #define __CONST_RING_SIZE(_s, _sz) \  argument
46     (__RD32(((_sz) - offsetof(struct _s##_sring, ring)) / \
47 	    sizeof(((struct _s##_sring *)0)->ring[0])))
51 #define __RING_SIZE(_s, _sz) \  argument
52     (__RD32(((_sz) - (long)(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0])))
133 #define SHARED_RING_INIT(_s) do {                                       \  argument
134     (_s)->req_prod  = (_s)->rsp_prod  = 0;                              \
135     (_s)->req_event = (_s)->rsp_event = 1;                              \
136     (void)memset((_s)->__pad, 0, sizeof((_s)->__pad));                  \
139 #define FRONT_RING_ATTACH(_r, _s, _i, __size) do {                      \  argument
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
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