69 static unsigned long reset_rng_health_state(struct cn10k_rng *rng)  in reset_rng_health_state()  argument
78 static int check_rng_health(struct cn10k_rng *rng)  in check_rng_health()  argument
84 	if (!rng->reg_base)  in check_rng_health()
87 	status = readq(rng->reg_base + RNM_PF_EBG_HEALTH);  in check_rng_health()
89 		err = reset_rng_health_state(rng);  in check_rng_health()
91 			dev_err(&rng->pdev->dev, "HWRNG: Health test failed (status=%llx)\n",  in check_rng_health()
93 			dev_err(&rng->pdev->dev, "HWRNG: error during reset (error=%lx)\n",  in check_rng_health()
102 static bool cn10k_read_trng(struct cn10k_rng *rng, u64 *value)  in cn10k_read_trng()  argument
108 	if (rng->extended_trng_regs) {  in cn10k_read_trng()
110 			*value = readq(rng->reg_base + RNM_PF_TRNG_DAT);  in cn10k_read_trng()
113 			status = readq(rng->reg_base + RNM_PF_TRNG_RES);  in cn10k_read_trng()
119 	*value = readq(rng->reg_base + RNM_PF_RANDOM);  in cn10k_read_trng()
125 		upper = readq(rng->reg_base + RNM_PF_RANDOM);  in cn10k_read_trng()
126 		lower = readq(rng->reg_base + RNM_PF_RANDOM);  in cn10k_read_trng()
128 			upper = readq(rng->reg_base + RNM_PF_RANDOM);  in cn10k_read_trng()
130 			lower = readq(rng->reg_base + RNM_PF_RANDOM);  in cn10k_read_trng()
140 	struct cn10k_rng *rng = (struct cn10k_rng *)hwrng->priv;  in cn10k_rng_read()  local
146 	err = check_rng_health(rng);  in cn10k_rng_read()
153 		if (!cn10k_read_trng(rng, &value))  in cn10k_rng_read()
162 		if (!cn10k_read_trng(rng, &value))  in cn10k_rng_read()
179 	struct	cn10k_rng *rng;  in cn10k_rng_probe()  local
182 	rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);  in cn10k_rng_probe()
183 	if (!rng)  in cn10k_rng_probe()
186 	rng->pdev = pdev;  in cn10k_rng_probe()
187 	pci_set_drvdata(pdev, rng);  in cn10k_rng_probe()
189 	rng->reg_base = pcim_iomap(pdev, 0, 0);  in cn10k_rng_probe()
190 	if (!rng->reg_base)  in cn10k_rng_probe()
193 	rng->ops.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,  in cn10k_rng_probe()
194 				       "cn10k-rng-%s", dev_name(&pdev->dev));  in cn10k_rng_probe()
195 	if (!rng->ops.name)  in cn10k_rng_probe()
198 	rng->ops.read = cn10k_rng_read;  in cn10k_rng_probe()
199 	rng->ops.priv = (unsigned long)rng;  in cn10k_rng_probe()
201 	rng->extended_trng_regs = cn10k_is_extended_trng_regs_supported(pdev);  in cn10k_rng_probe()
203 	reset_rng_health_state(rng);  in cn10k_rng_probe()
205 	err = devm_hwrng_register(&pdev->dev, &rng->ops);  in cn10k_rng_probe()
213 	{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xA098) }, /* RNG PF */
227 MODULE_DESCRIPTION("Marvell CN10K HW RNG Driver");