1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * B0D4 processor thermal device
4 * Copyright (c) 2020, Intel Corporation.
5 */
6
7#include <linux/acpi.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/thermal.h>
12
13#include "int340x_thermal_zone.h"
14#include "processor_thermal_device.h"
15#include "../intel_soc_dts_iosf.h"
16
17#define DRV_NAME "proc_thermal"
18
19static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)
20{
21	struct proc_thermal_device *proc_priv;
22	struct pci_dev *pdev = devid;
23
24	proc_priv = pci_get_drvdata(pdev);
25
26	intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);
27
28	return IRQ_HANDLED;
29}
30
31static int proc_thermal_pci_probe(struct pci_dev *pdev,
32				  const struct pci_device_id *id)
33{
34	struct proc_thermal_device *proc_priv;
35	int ret;
36
37	ret = pcim_enable_device(pdev);
38	if (ret < 0) {
39		dev_err(&pdev->dev, "error: could not enable device\n");
40		return ret;
41	}
42
43	proc_priv = devm_kzalloc(&pdev->dev, sizeof(*proc_priv), GFP_KERNEL);
44	if (!proc_priv)
45		return -ENOMEM;
46
47	ret = proc_thermal_add(&pdev->dev, proc_priv);
48	if (ret)
49		return ret;
50
51	pci_set_drvdata(pdev, proc_priv);
52
53	if (pdev->device == PCI_DEVICE_ID_INTEL_BSW_THERMAL) {
54		/*
55		 * Enumerate additional DTS sensors available via IOSF.
56		 * But we are not treating as a failure condition, if
57		 * there are no aux DTSs enabled or fails. This driver
58		 * already exposes sensors, which can be accessed via
59		 * ACPI/MSR. So we don't want to fail for auxiliary DTSs.
60		 */
61		proc_priv->soc_dts = intel_soc_dts_iosf_init(
62					INTEL_SOC_DTS_INTERRUPT_MSI, false, 0);
63
64		if (!IS_ERR(proc_priv->soc_dts) && pdev->irq) {
65			ret = pci_enable_msi(pdev);
66			if (!ret) {
67				ret = request_threaded_irq(pdev->irq, NULL,
68						proc_thermal_pci_msi_irq,
69						IRQF_ONESHOT, "proc_thermal",
70						pdev);
71				if (ret) {
72					intel_soc_dts_iosf_exit(
73							proc_priv->soc_dts);
74					pci_disable_msi(pdev);
75					proc_priv->soc_dts = NULL;
76				}
77			}
78		} else
79			dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");
80	} else {
81
82	}
83
84	ret = proc_thermal_mmio_add(pdev, proc_priv, id->driver_data);
85	if (ret) {
86		proc_thermal_remove(proc_priv);
87		return ret;
88	}
89
90	return 0;
91}
92
93static void proc_thermal_pci_remove(struct pci_dev *pdev)
94{
95	struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);
96
97	if (proc_priv->soc_dts) {
98		intel_soc_dts_iosf_exit(proc_priv->soc_dts);
99		if (pdev->irq) {
100			free_irq(pdev->irq, pdev);
101			pci_disable_msi(pdev);
102		}
103	}
104
105	proc_thermal_mmio_remove(pdev, proc_priv);
106	proc_thermal_remove(proc_priv);
107}
108
109#ifdef CONFIG_PM_SLEEP
110static int proc_thermal_pci_suspend(struct device *dev)
111{
112	return proc_thermal_suspend(dev);
113}
114static int proc_thermal_pci_resume(struct device *dev)
115{
116	return proc_thermal_resume(dev);
117}
118#else
119#define proc_thermal_pci_suspend NULL
120#define proc_thermal_pci_resume NULL
121#endif
122
123static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, proc_thermal_pci_suspend,
124			 proc_thermal_pci_resume);
125
126static const struct pci_device_id proc_thermal_pci_ids[] = {
127	{ PCI_DEVICE_DATA(INTEL, BDW_THERMAL, 0) },
128	{ PCI_DEVICE_DATA(INTEL, BSW_THERMAL, 0) },
129	{ PCI_DEVICE_DATA(INTEL, BXT0_THERMAL, 0) },
130	{ PCI_DEVICE_DATA(INTEL, BXT1_THERMAL, 0) },
131	{ PCI_DEVICE_DATA(INTEL, BXTX_THERMAL, 0) },
132	{ PCI_DEVICE_DATA(INTEL, BXTP_THERMAL, 0) },
133	{ PCI_DEVICE_DATA(INTEL, CNL_THERMAL, 0) },
134	{ PCI_DEVICE_DATA(INTEL, CFL_THERMAL, 0) },
135	{ PCI_DEVICE_DATA(INTEL, GLK_THERMAL, 0) },
136	{ PCI_DEVICE_DATA(INTEL, HSB_THERMAL, 0) },
137	{ PCI_DEVICE_DATA(INTEL, ICL_THERMAL, PROC_THERMAL_FEATURE_RAPL) },
138	{ PCI_DEVICE_DATA(INTEL, JSL_THERMAL, 0) },
139	{ PCI_DEVICE_DATA(INTEL, SKL_THERMAL, PROC_THERMAL_FEATURE_RAPL) },
140	{ PCI_DEVICE_DATA(INTEL, TGL_THERMAL, PROC_THERMAL_FEATURE_RAPL |
141	  PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_WT_REQ) },
142	{ },
143};
144
145MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);
146
147static struct pci_driver proc_thermal_pci_driver = {
148	.name		= DRV_NAME,
149	.probe		= proc_thermal_pci_probe,
150	.remove		= proc_thermal_pci_remove,
151	.id_table	= proc_thermal_pci_ids,
152	.driver.pm	= &proc_thermal_pci_pm,
153};
154
155module_pci_driver(proc_thermal_pci_driver);
156
157MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
158MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
159MODULE_LICENSE("GPL v2");
160