25 	struct sun8i_ce_dev *ce;  in sun8i_ce_trng_read()  local
35 	ce = container_of(rng, struct sun8i_ce_dev, trng);  in sun8i_ce_trng_read()
46 	ce->hwrng_stat_req++;  in sun8i_ce_trng_read()
47 	ce->hwrng_stat_bytes += todo;  in sun8i_ce_trng_read()
50 	dma_dst = dma_map_single(ce->dev, d, todo, DMA_FROM_DEVICE);  in sun8i_ce_trng_read()
51 	if (dma_mapping_error(ce->dev, dma_dst)) {  in sun8i_ce_trng_read()
52 		dev_err(ce->dev, "Cannot DMA MAP DST\n");  in sun8i_ce_trng_read()
57 	err = pm_runtime_resume_and_get(ce->dev);  in sun8i_ce_trng_read()
61 	mutex_lock(&ce->rnglock);  in sun8i_ce_trng_read()
62 	chan = &ce->chanlist[flow];  in sun8i_ce_trng_read()
68 	common = ce->variant->trng | CE_COMM_INT;  in sun8i_ce_trng_read()
72 	if (ce->variant->trng_t_dlen_in_bytes)  in sun8i_ce_trng_read()
82 	ce->chanlist[flow].timeout = todo;  in sun8i_ce_trng_read()
84 	err = sun8i_ce_run_task(ce, 3, "TRNG");  in sun8i_ce_trng_read()
85 	mutex_unlock(&ce->rnglock);  in sun8i_ce_trng_read()
87 	pm_runtime_put(ce->dev);  in sun8i_ce_trng_read()
90 	dma_unmap_single(ce->dev, dma_dst, todo, DMA_FROM_DEVICE);  in sun8i_ce_trng_read()
101 int sun8i_ce_hwrng_register(struct sun8i_ce_dev *ce)  in sun8i_ce_hwrng_register()  argument
105 	if (ce->variant->trng == CE_ID_NOTSUPP) {  in sun8i_ce_hwrng_register()
106 		dev_info(ce->dev, "TRNG not supported\n");  in sun8i_ce_hwrng_register()
109 	ce->trng.name = "sun8i Crypto Engine TRNG";  in sun8i_ce_hwrng_register()
110 	ce->trng.read = sun8i_ce_trng_read;  in sun8i_ce_hwrng_register()
112 	ret = hwrng_register(&ce->trng);  in sun8i_ce_hwrng_register()
114 		dev_err(ce->dev, "Fail to register the TRNG\n");  in sun8i_ce_hwrng_register()
118 void sun8i_ce_hwrng_unregister(struct sun8i_ce_dev *ce)  in sun8i_ce_hwrng_unregister()  argument
120 	if (ce->variant->trng == CE_ID_NOTSUPP)  in sun8i_ce_hwrng_unregister()
122 	hwrng_unregister(&ce->trng);  in sun8i_ce_hwrng_unregister()