xref: /openbmc/linux/drivers/hwtracing/intel_th/pci.c (revision dc6a81c3) 
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Intel(R) Trace Hub pci driver
4  *
5  * Copyright (C) 2014-2015 Intel Corporation.
6  */
7 
8 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
9 
10 #include <linux/types.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/sysfs.h>
14 #include <linux/pci.h>
15 
16 #include "intel_th.h"
17 
18 #define DRIVER_NAME "intel_th_pci"
19 
20 enum {
21 	TH_PCI_CONFIG_BAR	= 0,
22 	TH_PCI_STH_SW_BAR	= 2,
23 	TH_PCI_RTIT_BAR		= 4,
24 };
25 
26 #define BAR_MASK (BIT(TH_PCI_CONFIG_BAR) | BIT(TH_PCI_STH_SW_BAR))
27 
28 #define PCI_REG_NPKDSC	0x80
29 #define NPKDSC_TSACT	BIT(5)
30 
31 static int intel_th_pci_activate(struct intel_th *th)
32 {
33 	struct pci_dev *pdev = to_pci_dev(th->dev);
34 	u32 npkdsc;
35 	int err;
36 
37 	if (!INTEL_TH_CAP(th, tscu_enable))
38 		return 0;
39 
40 	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
41 	if (!err) {
42 		npkdsc |= NPKDSC_TSACT;
43 		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
44 	}
45 
46 	if (err)
47 		dev_err(&pdev->dev, "failed to read NPKDSC register\n");
48 
49 	return err;
50 }
51 
52 static void intel_th_pci_deactivate(struct intel_th *th)
53 {
54 	struct pci_dev *pdev = to_pci_dev(th->dev);
55 	u32 npkdsc;
56 	int err;
57 
58 	if (!INTEL_TH_CAP(th, tscu_enable))
59 		return;
60 
61 	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
62 	if (!err) {
63 		npkdsc |= NPKDSC_TSACT;
64 		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
65 	}
66 
67 	if (err)
68 		dev_err(&pdev->dev, "failed to read NPKDSC register\n");
69 }
70 
71 static int intel_th_pci_probe(struct pci_dev *pdev,
72 			      const struct pci_device_id *id)
73 {
74 	struct intel_th_drvdata *drvdata = (void *)id->driver_data;
75 	struct resource resource[TH_MMIO_END + TH_NVEC_MAX] = {
76 		[TH_MMIO_CONFIG]	= pdev->resource[TH_PCI_CONFIG_BAR],
77 		[TH_MMIO_SW]		= pdev->resource[TH_PCI_STH_SW_BAR],
78 	};
79 	int err, r = TH_MMIO_SW + 1, i;
80 	struct intel_th *th;
81 
82 	err = pcim_enable_device(pdev);
83 	if (err)
84 		return err;
85 
86 	err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
87 	if (err)
88 		return err;
89 
90 	if (pdev->resource[TH_PCI_RTIT_BAR].start) {
91 		resource[TH_MMIO_RTIT] = pdev->resource[TH_PCI_RTIT_BAR];
92 		r++;
93 	}
94 
95 	err = pci_alloc_irq_vectors(pdev, 1, 8, PCI_IRQ_ALL_TYPES);
96 	if (err > 0)
97 		for (i = 0; i < err; i++, r++) {
98 			resource[r].flags = IORESOURCE_IRQ;
99 			resource[r].start = pci_irq_vector(pdev, i);
100 		}
101 
102 	th = intel_th_alloc(&pdev->dev, drvdata, resource, r);
103 	if (IS_ERR(th))
104 		return PTR_ERR(th);
105 
106 	th->activate   = intel_th_pci_activate;
107 	th->deactivate = intel_th_pci_deactivate;
108 
109 	pci_set_master(pdev);
110 
111 	return 0;
112 }
113 
114 static void intel_th_pci_remove(struct pci_dev *pdev)
115 {
116 	struct intel_th *th = pci_get_drvdata(pdev);
117 
118 	intel_th_free(th);
119 
120 	pci_free_irq_vectors(pdev);
121 }
122 
123 static const struct intel_th_drvdata intel_th_2x = {
124 	.tscu_enable	= 1,
125 	.has_mintctl	= 1,
126 };
127 
128 static const struct pci_device_id intel_th_pci_id_table[] = {
129 	{
130 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
131 		.driver_data = (kernel_ulong_t)0,
132 	},
133 	{
134 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
135 		.driver_data = (kernel_ulong_t)0,
136 	},
137 	{
138 		/* Apollo Lake */
139 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
140 		.driver_data = (kernel_ulong_t)0,
141 	},
142 	{
143 		/* Broxton */
144 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
145 		.driver_data = (kernel_ulong_t)0,
146 	},
147 	{
148 		/* Broxton B-step */
149 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
150 		.driver_data = (kernel_ulong_t)0,
151 	},
152 	{
153 		/* Kaby Lake PCH-H */
154 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
155 		.driver_data = (kernel_ulong_t)0,
156 	},
157 	{
158 		/* Denverton */
159 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
160 		.driver_data = (kernel_ulong_t)0,
161 	},
162 	{
163 		/* Lewisburg PCH */
164 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
165 		.driver_data = (kernel_ulong_t)0,
166 	},
167 	{
168 		/* Lewisburg PCH */
169 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa226),
170 		.driver_data = (kernel_ulong_t)0,
171 	},
172 	{
173 		/* Gemini Lake */
174 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
175 		.driver_data = (kernel_ulong_t)&intel_th_2x,
176 	},
177 	{
178 		/* Cannon Lake H */
179 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
180 		.driver_data = (kernel_ulong_t)&intel_th_2x,
181 	},
182 	{
183 		/* Cannon Lake LP */
184 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
185 		.driver_data = (kernel_ulong_t)&intel_th_2x,
186 	},
187 	{
188 		/* Cedar Fork PCH */
189 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
190 		.driver_data = (kernel_ulong_t)&intel_th_2x,
191 	},
192 	{
193 		/* Ice Lake PCH */
194 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x34a6),
195 		.driver_data = (kernel_ulong_t)&intel_th_2x,
196 	},
197 	{
198 		/* Comet Lake */
199 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x02a6),
200 		.driver_data = (kernel_ulong_t)&intel_th_2x,
201 	},
202 	{
203 		/* Comet Lake PCH */
204 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x06a6),
205 		.driver_data = (kernel_ulong_t)&intel_th_2x,
206 	},
207 	{
208 		/* Comet Lake PCH-V */
209 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa3a6),
210 		.driver_data = (kernel_ulong_t)&intel_th_2x,
211 	},
212 	{
213 		/* Ice Lake NNPI */
214 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x45c5),
215 		.driver_data = (kernel_ulong_t)&intel_th_2x,
216 	},
217 	{
218 		/* Ice Lake CPU */
219 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8a29),
220 		.driver_data = (kernel_ulong_t)&intel_th_2x,
221 	},
222 	{
223 		/* Tiger Lake CPU */
224 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9a33),
225 		.driver_data = (kernel_ulong_t)&intel_th_2x,
226 	},
227 	{
228 		/* Tiger Lake PCH */
229 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa0a6),
230 		.driver_data = (kernel_ulong_t)&intel_th_2x,
231 	},
232 	{
233 		/* Jasper Lake PCH */
234 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4da6),
235 		.driver_data = (kernel_ulong_t)&intel_th_2x,
236 	},
237 	{
238 		/* Elkhart Lake */
239 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4b26),
240 		.driver_data = (kernel_ulong_t)&intel_th_2x,
241 	},
242 	{ 0 },
243 };
244 
245 MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
246 
247 static struct pci_driver intel_th_pci_driver = {
248 	.name		= DRIVER_NAME,
249 	.id_table	= intel_th_pci_id_table,
250 	.probe		= intel_th_pci_probe,
251 	.remove		= intel_th_pci_remove,
252 };
253 
254 module_pci_driver(intel_th_pci_driver);
255 
256 MODULE_LICENSE("GPL v2");
257 MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
258 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
259