82 static int check_rng_health(struct cavium_rng *rng)  in check_rng_health()  argument
90 	if (!rng->pf_regbase)  in check_rng_health()
93 	status = readq(rng->pf_regbase + HEALTH_STATUS_REG);  in check_rng_health()
95 		dev_err(&rng->pdev->dev, "HWRNG: Startup health test failed\n");  in check_rng_health()
110 	cur_err = (cycles * 1000000000) / rng->clock_rate; /* In nanosec */  in check_rng_health()
116 		rng->prev_error = 0;  in check_rng_health()
117 		rng->prev_time = 0;  in check_rng_health()
121 	if (rng->prev_error) {  in check_rng_health()
125 		time_elapsed = (cur_time - rng->prev_time) * 10;  in check_rng_health()
126 		time_elapsed += rng->prev_error;  in check_rng_health()
133 			dev_err(&rng->pdev->dev, "HWRNG failure detected\n");  in check_rng_health()
134 			rng->prev_error = cur_err;  in check_rng_health()
135 			rng->prev_time = cur_time;  in check_rng_health()
140 	rng->prev_error = cur_err;  in check_rng_health()
141 	rng->prev_time = cur_time;  in check_rng_health()
145 /* Read data from the RNG unit */
146 static int cavium_rng_read(struct hwrng *rng, void *dat, size_t max, bool wait)  in cavium_rng_read()  argument
148 	struct cavium_rng *p = container_of(rng, struct cavium_rng, ops);  in cavium_rng_read()
169 static int cavium_map_pf_regs(struct cavium_rng *rng)  in cavium_map_pf_regs()  argument
174 	if (is_octeontx(rng->pdev)) {  in cavium_map_pf_regs()
175 		rng->pf_regbase = NULL;  in cavium_map_pf_regs()
182 		pr_err("Cannot find RNG PF device\n");  in cavium_map_pf_regs()
186 	rng->pf_regbase = ioremap(pci_resource_start(pdev, 0),  in cavium_map_pf_regs()
188 	if (!rng->pf_regbase) {  in cavium_map_pf_regs()
197 	rng->clock_rate = rng_get_coprocessor_clkrate();  in cavium_map_pf_regs()
202 /* Map Cavium RNG to an HWRNG object */
206 	struct	cavium_rng *rng;  in cavium_rng_probe_vf()  local
209 	rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);  in cavium_rng_probe_vf()
210 	if (!rng)  in cavium_rng_probe_vf()
213 	rng->pdev = pdev;  in cavium_rng_probe_vf()
215 	/* Map the RNG result */  in cavium_rng_probe_vf()
216 	rng->result = pcim_iomap(pdev, 0, 0);  in cavium_rng_probe_vf()
217 	if (!rng->result) {  in cavium_rng_probe_vf()
222 	rng->ops.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,  in cavium_rng_probe_vf()
223 				       "cavium-rng-%s", dev_name(&pdev->dev));  in cavium_rng_probe_vf()
224 	if (!rng->ops.name)  in cavium_rng_probe_vf()
227 	rng->ops.read    = cavium_rng_read;  in cavium_rng_probe_vf()
229 	pci_set_drvdata(pdev, rng);  in cavium_rng_probe_vf()
232 	ret = cavium_map_pf_regs(rng);  in cavium_rng_probe_vf()
236 	ret = devm_hwrng_register(&pdev->dev, &rng->ops);  in cavium_rng_probe_vf()
248 	struct cavium_rng *rng;  in cavium_rng_remove_vf()  local
250 	rng = pci_get_drvdata(pdev);  in cavium_rng_remove_vf()
251 	iounmap(rng->pf_regbase);  in cavium_rng_remove_vf()