qsfp_read
total_read = qsfp_read(ppd, target, *ppos, buff, count);
ret = qsfp_read(ppd, target, addr, bp, len);
ret = qsfp_read(ppd, target, 0, cache, QSFP_PAGESIZE);
ret = qsfp_read(ppd, target, 384, cache + 256, 128);
ret = qsfp_read(ppd, target, 640, cache + 384, 128);
ret = qsfp_read(ppd, target, 896, cache + 512, 128);
ret = qsfp_read(ppd, target, 640, cache + 384, 128);
ret = qsfp_read(ppd, target, 896, cache + 512, 128);
ret = qsfp_read(ppd, target, 384, cache + 256, 128);
ret = qsfp_read(ppd, target, 896, cache + 512, 128);
ret = qsfp_read(ppd, target, 896, cache + 512, 128);
int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,