SFP_BLOCK_SIZE
#define SFP_RTDI_LEN SFP_BLOCK_SIZE
for (iter = 0; iter < SFP_DEV_SIZE / SFP_BLOCK_SIZE; iter++) {
addr, offset, SFP_BLOCK_SIZE, BIT_1);
if ((count - c) >= SFP_BLOCK_SIZE)
sz = SFP_BLOCK_SIZE;
buf += SFP_BLOCK_SIZE;
phys_addr += SFP_BLOCK_SIZE;
sfp_data += SFP_BLOCK_SIZE;
offset += SFP_BLOCK_SIZE;