xref: /openbmc/linux/drivers/hwtracing/intel_th/pci.c (revision 842ed298) 
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_1x_multi_is_broken = {
124 	.multi_is_broken	= 1,
125 };
126 
127 static const struct intel_th_drvdata intel_th_2x = {
128 	.tscu_enable	= 1,
129 	.has_mintctl	= 1,
130 };
131 
132 static const struct pci_device_id intel_th_pci_id_table[] = {
133 	{
134 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
135 		.driver_data = (kernel_ulong_t)0,
136 	},
137 	{
138 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
139 		.driver_data = (kernel_ulong_t)0,
140 	},
141 	{
142 		/* Apollo Lake */
143 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
144 		.driver_data = (kernel_ulong_t)0,
145 	},
146 	{
147 		/* Broxton */
148 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
149 		.driver_data = (kernel_ulong_t)0,
150 	},
151 	{
152 		/* Broxton B-step */
153 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
154 		.driver_data = (kernel_ulong_t)0,
155 	},
156 	{
157 		/* Kaby Lake PCH-H */
158 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
159 		.driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken,
160 	},
161 	{
162 		/* Denverton */
163 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
164 		.driver_data = (kernel_ulong_t)0,
165 	},
166 	{
167 		/* Lewisburg PCH */
168 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
169 		.driver_data = (kernel_ulong_t)0,
170 	},
171 	{
172 		/* Lewisburg PCH */
173 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa226),
174 		.driver_data = (kernel_ulong_t)0,
175 	},
176 	{
177 		/* Gemini Lake */
178 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
179 		.driver_data = (kernel_ulong_t)&intel_th_2x,
180 	},
181 	{
182 		/* Cannon Lake H */
183 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
184 		.driver_data = (kernel_ulong_t)&intel_th_2x,
185 	},
186 	{
187 		/* Cannon Lake LP */
188 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
189 		.driver_data = (kernel_ulong_t)&intel_th_2x,
190 	},
191 	{
192 		/* Cedar Fork PCH */
193 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
194 		.driver_data = (kernel_ulong_t)&intel_th_2x,
195 	},
196 	{
197 		/* Ice Lake PCH */
198 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x34a6),
199 		.driver_data = (kernel_ulong_t)&intel_th_2x,
200 	},
201 	{
202 		/* Comet Lake */
203 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x02a6),
204 		.driver_data = (kernel_ulong_t)&intel_th_2x,
205 	},
206 	{
207 		/* Comet Lake PCH */
208 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x06a6),
209 		.driver_data = (kernel_ulong_t)&intel_th_2x,
210 	},
211 	{
212 		/* Comet Lake PCH-V */
213 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa3a6),
214 		.driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken,
215 	},
216 	{
217 		/* Ice Lake NNPI */
218 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x45c5),
219 		.driver_data = (kernel_ulong_t)&intel_th_2x,
220 	},
221 	{
222 		/* Ice Lake CPU */
223 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8a29),
224 		.driver_data = (kernel_ulong_t)&intel_th_2x,
225 	},
226 	{
227 		/* Tiger Lake CPU */
228 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9a33),
229 		.driver_data = (kernel_ulong_t)&intel_th_2x,
230 	},
231 	{
232 		/* Tiger Lake PCH */
233 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa0a6),
234 		.driver_data = (kernel_ulong_t)&intel_th_2x,
235 	},
236 	{
237 		/* Tiger Lake PCH-H */
238 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x43a6),
239 		.driver_data = (kernel_ulong_t)&intel_th_2x,
240 	},
241 	{
242 		/* Jasper Lake PCH */
243 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4da6),
244 		.driver_data = (kernel_ulong_t)&intel_th_2x,
245 	},
246 	{
247 		/* Jasper Lake CPU */
248 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4e29),
249 		.driver_data = (kernel_ulong_t)&intel_th_2x,
250 	},
251 	{
252 		/* Elkhart Lake CPU */
253 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4529),
254 		.driver_data = (kernel_ulong_t)&intel_th_2x,
255 	},
256 	{
257 		/* Elkhart Lake */
258 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4b26),
259 		.driver_data = (kernel_ulong_t)&intel_th_2x,
260 	},
261 	{
262 		/* Emmitsburg PCH */
263 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1bcc),
264 		.driver_data = (kernel_ulong_t)&intel_th_2x,
265 	},
266 	{
267 		/* Alder Lake */
268 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7aa6),
269 		.driver_data = (kernel_ulong_t)&intel_th_2x,
270 	},
271 	{
272 		/* Alder Lake-P */
273 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x51a6),
274 		.driver_data = (kernel_ulong_t)&intel_th_2x,
275 	},
276 	{
277 		/* Alder Lake CPU */
278 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x466f),
279 		.driver_data = (kernel_ulong_t)&intel_th_2x,
280 	},
281 	{ 0 },
282 };
283 
284 MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
285 
286 static struct pci_driver intel_th_pci_driver = {
287 	.name		= DRIVER_NAME,
288 	.id_table	= intel_th_pci_id_table,
289 	.probe		= intel_th_pci_probe,
290 	.remove		= intel_th_pci_remove,
291 };
292 
293 module_pci_driver(intel_th_pci_driver);
294 
295 MODULE_LICENSE("GPL v2");
296 MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
297 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
298