1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * fam15h_power.c - AMD Family 15h processor power monitoring
5  * Copyright (c) 2011-2016 Advanced Micro Devices, Inc.
11 #include <linux/hwmon-sysfs.h>
23 MODULE_DESCRIPTION("AMD Family 15h CPU processor power monitor");
41 /* set maximum interval as 1 second */
77 	struct pci_dev *f4 = data->pdev;  in power1_input_show()
79 	pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),  in power1_input_show()
96 	pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),  in power1_input_show()
109 				data->base_tdp)) << running_avg_range;  in power1_input_show()
110 	curr_pwr_watts -= running_avg_capture;  in power1_input_show()
111 	curr_pwr_watts *= data->tdp_to_watts;  in power1_input_show()
130 	return sprintf(buf, "%u\n", data->processor_pwr_watts);  in power1_crit_show()
147 	rdmsrl_safe(MSR_F15H_CU_PWR_ACCUMULATOR, &data->cu_acc_power[cu]);  in do_read_registers_on_cu()
148 	rdmsrl_safe(MSR_F15H_PTSC, &data->cpu_sw_pwr_ptsc[cu]);  in do_read_registers_on_cu()
150 	data->cu_on[cu] = 1;  in do_read_registers_on_cu()
165 		return -ENOMEM;  in read_registers()
167 	memset(data->cu_on, 0, sizeof(int) * MAX_CUS);  in read_registers()
177 	core = -1;  in read_registers()
220 		prev_cu_acc_power[cu] = data->cu_acc_power[cu];  in power1_average_show()
221 		prev_ptsc[cu] = data->cpu_sw_pwr_ptsc[cu];  in power1_average_show()
224 	leftover = schedule_timeout_interruptible(msecs_to_jiffies(data->power_period));  in power1_average_show()
234 		if (data->cu_on[cu] == 0)  in power1_average_show()
237 		if (data->cu_acc_power[cu] < prev_cu_acc_power[cu]) {  in power1_average_show()
238 			jdelta[cu] = data->max_cu_acc_power + data->cu_acc_power[cu];  in power1_average_show()
239 			jdelta[cu] -= prev_cu_acc_power[cu];  in power1_average_show()
241 			jdelta[cu] = data->cu_acc_power[cu] - prev_cu_acc_power[cu];  in power1_average_show()
243 		tdelta = data->cpu_sw_pwr_ptsc[cu] - prev_ptsc[cu];  in power1_average_show()
244 		jdelta[cu] *= data->cpu_pwr_sample_ratio * 1000;  in power1_average_show()
261 	return sprintf(buf, "%lu\n", data->power_period);  in power1_average_interval_show()
277 		return -EINVAL;  in power1_average_interval_store()
279 	/* the interval value should be greater than 0 */  in power1_average_interval_store()
281 		return -EINVAL;  in power1_average_interval_store()
283 	data->power_period = temp;  in power1_average_interval_store()
296 	if (c->x86 == 0x15 &&  in fam15h_power_init_attrs()
297 	    (c->x86_model <= 0xf ||  in fam15h_power_init_attrs()
298 	     (c->x86_model >= 0x60 && c->x86_model <= 0x7f)))  in fam15h_power_init_attrs()
305 	fam15h_power_attrs = devm_kcalloc(&pdev->dev, n,  in fam15h_power_init_attrs()
310 		return -ENOMEM;  in fam15h_power_init_attrs()
314 	if (c->x86 == 0x15 &&  in fam15h_power_init_attrs()
315 	    (c->x86_model <= 0xf ||  in fam15h_power_init_attrs()
316 	     (c->x86_model >= 0x60 && c->x86_model <= 0x7f)))  in fam15h_power_init_attrs()
324 	data->group.attrs = fam15h_power_attrs;  in fam15h_power_init_attrs()
333 	pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 3),  in should_load_on_this_node()
363 	pci_bus_read_config_dword(pdev->bus,  in tweak_runavg_range()
364 		PCI_DEVFN(PCI_SLOT(pdev->devfn), 5),  in tweak_runavg_range()
371 	pci_bus_write_config_dword(pdev->bus,  in tweak_runavg_range()
372 		PCI_DEVFN(PCI_SLOT(pdev->devfn), 5),  in tweak_runavg_range()
394 	data->base_tdp = val >> 16;  in fam15h_power_init_data()
397 	pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),  in fam15h_power_init_data()
400 	data->tdp_to_watts = ((val & 0x3ff) << 6) | ((val >> 10) & 0x3f);  in fam15h_power_init_data()
401 	tmp *= data->tdp_to_watts;  in fam15h_power_init_data()
405 		dev_warn(&f4->dev,  in fam15h_power_init_data()
410 	data->processor_pwr_watts = (tmp * 15625) >> 10;  in fam15h_power_init_data()
426 	data->cpu_pwr_sample_ratio = cpuid_ecx(0x80000007);  in fam15h_power_init_data()
430 		return -ENODEV;  in fam15h_power_init_data()
433 	data->max_cu_acc_power = tmp;  in fam15h_power_init_data()
436 	 * Milliseconds are a reasonable interval for the measurement.  in fam15h_power_init_data()
439 	 * interval as 10 ms.  in fam15h_power_init_data()
441 	data->power_period = 10;  in fam15h_power_init_data()
450 	struct device *dev = &pdev->dev;  in fam15h_power_probe()
457 	 * are working hand-in-hand  in fam15h_power_probe()
462 		return -ENODEV;  in fam15h_power_probe()
466 		return -ENOMEM;  in fam15h_power_probe()
472 	data->pdev = pdev;  in fam15h_power_probe()
474 	data->groups[0] = &data->group;  in fam15h_power_probe()
478 							   &data->groups[0]);  in fam15h_power_probe()