int alloc_size; /* total buffer size needed */
char *top_v, *curr_v; /* virtual addrs into memory block */
dma_addr_t top_p, curr_p; /* physical addrs into memory block */
int alloc_size; /* total buffer size needed */
char *top_v, *curr_v; /* virtual addrs into memory block */
dma_addr_t top_p, curr_p; /* physical addrs into memory block */