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
proc_thermal_pci_msi_irq(int irq,void * devid)19 static 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
proc_thermal_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)31 static 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
proc_thermal_pci_remove(struct pci_dev * pdev)93 static 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
proc_thermal_pci_suspend(struct device * dev)110 static int proc_thermal_pci_suspend(struct device *dev)
111 {
112 return proc_thermal_suspend(dev);
113 }
proc_thermal_pci_resume(struct device * dev)114 static 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
123 static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, proc_thermal_pci_suspend,
124 proc_thermal_pci_resume);
125
126 static 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 | PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_MBOX) },
141 { },
142 };
143
144 MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);
145
146 static struct pci_driver proc_thermal_pci_driver = {
147 .name = DRV_NAME,
148 .probe = proc_thermal_pci_probe,
149 .remove = proc_thermal_pci_remove,
150 .id_table = proc_thermal_pci_ids,
151 .driver.pm = &proc_thermal_pci_pm,
152 };
153
154 module_pci_driver(proc_thermal_pci_driver);
155
156 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
157 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
158 MODULE_LICENSE("GPL v2");
159