xref: /openbmc/linux/drivers/hwtracing/intel_th/pci.c (revision 6726d552) 
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 	const 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 		err = PTR_ERR(th);
105 		goto err_free_irq;
106 	}
107 
108 	th->activate   = intel_th_pci_activate;
109 	th->deactivate = intel_th_pci_deactivate;
110 
111 	pci_set_master(pdev);
112 
113 	return 0;
114 
115 err_free_irq:
116 	pci_free_irq_vectors(pdev);
117 	return err;
118 }
119 
120 static void intel_th_pci_remove(struct pci_dev *pdev)
121 {
122 	struct intel_th *th = pci_get_drvdata(pdev);
123 
124 	intel_th_free(th);
125 
126 	pci_free_irq_vectors(pdev);
127 }
128 
129 static const struct intel_th_drvdata intel_th_1x_multi_is_broken = {
130 	.multi_is_broken	= 1,
131 };
132 
133 static const struct intel_th_drvdata intel_th_2x = {
134 	.tscu_enable	= 1,
135 	.has_mintctl	= 1,
136 };
137 
138 static const struct pci_device_id intel_th_pci_id_table[] = {
139 	{
140 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
141 		.driver_data = (kernel_ulong_t)0,
142 	},
143 	{
144 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
145 		.driver_data = (kernel_ulong_t)0,
146 	},
147 	{
148 		/* Apollo Lake */
149 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
150 		.driver_data = (kernel_ulong_t)0,
151 	},
152 	{
153 		/* Broxton */
154 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
155 		.driver_data = (kernel_ulong_t)0,
156 	},
157 	{
158 		/* Broxton B-step */
159 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
160 		.driver_data = (kernel_ulong_t)0,
161 	},
162 	{
163 		/* Kaby Lake PCH-H */
164 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
165 		.driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken,
166 	},
167 	{
168 		/* Denverton */
169 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
170 		.driver_data = (kernel_ulong_t)0,
171 	},
172 	{
173 		/* Lewisburg PCH */
174 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
175 		.driver_data = (kernel_ulong_t)0,
176 	},
177 	{
178 		/* Lewisburg PCH */
179 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa226),
180 		.driver_data = (kernel_ulong_t)0,
181 	},
182 	{
183 		/* Gemini Lake */
184 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
185 		.driver_data = (kernel_ulong_t)&intel_th_2x,
186 	},
187 	{
188 		/* Cannon Lake H */
189 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
190 		.driver_data = (kernel_ulong_t)&intel_th_2x,
191 	},
192 	{
193 		/* Cannon Lake LP */
194 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
195 		.driver_data = (kernel_ulong_t)&intel_th_2x,
196 	},
197 	{
198 		/* Cedar Fork PCH */
199 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
200 		.driver_data = (kernel_ulong_t)&intel_th_2x,
201 	},
202 	{
203 		/* Ice Lake PCH */
204 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x34a6),
205 		.driver_data = (kernel_ulong_t)&intel_th_2x,
206 	},
207 	{
208 		/* Comet Lake */
209 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x02a6),
210 		.driver_data = (kernel_ulong_t)&intel_th_2x,
211 	},
212 	{
213 		/* Comet Lake PCH */
214 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x06a6),
215 		.driver_data = (kernel_ulong_t)&intel_th_2x,
216 	},
217 	{
218 		/* Comet Lake PCH-V */
219 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa3a6),
220 		.driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken,
221 	},
222 	{
223 		/* Ice Lake NNPI */
224 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x45c5),
225 		.driver_data = (kernel_ulong_t)&intel_th_2x,
226 	},
227 	{
228 		/* Ice Lake CPU */
229 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8a29),
230 		.driver_data = (kernel_ulong_t)&intel_th_2x,
231 	},
232 	{
233 		/* Tiger Lake CPU */
234 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9a33),
235 		.driver_data = (kernel_ulong_t)&intel_th_2x,
236 	},
237 	{
238 		/* Tiger Lake PCH */
239 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa0a6),
240 		.driver_data = (kernel_ulong_t)&intel_th_2x,
241 	},
242 	{
243 		/* Tiger Lake PCH-H */
244 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x43a6),
245 		.driver_data = (kernel_ulong_t)&intel_th_2x,
246 	},
247 	{
248 		/* Jasper Lake PCH */
249 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4da6),
250 		.driver_data = (kernel_ulong_t)&intel_th_2x,
251 	},
252 	{
253 		/* Jasper Lake CPU */
254 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4e29),
255 		.driver_data = (kernel_ulong_t)&intel_th_2x,
256 	},
257 	{
258 		/* Elkhart Lake CPU */
259 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4529),
260 		.driver_data = (kernel_ulong_t)&intel_th_2x,
261 	},
262 	{
263 		/* Elkhart Lake */
264 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4b26),
265 		.driver_data = (kernel_ulong_t)&intel_th_2x,
266 	},
267 	{
268 		/* Emmitsburg PCH */
269 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1bcc),
270 		.driver_data = (kernel_ulong_t)&intel_th_2x,
271 	},
272 	{
273 		/* Alder Lake */
274 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7aa6),
275 		.driver_data = (kernel_ulong_t)&intel_th_2x,
276 	},
277 	{
278 		/* Alder Lake-P */
279 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x51a6),
280 		.driver_data = (kernel_ulong_t)&intel_th_2x,
281 	},
282 	{
283 		/* Alder Lake-M */
284 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x54a6),
285 		.driver_data = (kernel_ulong_t)&intel_th_2x,
286 	},
287 	{
288 		/* Meteor Lake-P */
289 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7e24),
290 		.driver_data = (kernel_ulong_t)&intel_th_2x,
291 	},
292 	{
293 		/* Raptor Lake-S */
294 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x7a26),
295 		.driver_data = (kernel_ulong_t)&intel_th_2x,
296 	},
297 	{
298 		/* Raptor Lake-S CPU */
299 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa76f),
300 		.driver_data = (kernel_ulong_t)&intel_th_2x,
301 	},
302 	{
303 		/* Alder Lake CPU */
304 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x466f),
305 		.driver_data = (kernel_ulong_t)&intel_th_2x,
306 	},
307 	{
308 		/* Rocket Lake CPU */
309 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4c19),
310 		.driver_data = (kernel_ulong_t)&intel_th_2x,
311 	},
312 	{ 0 },
313 };
314 
315 MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
316 
317 static struct pci_driver intel_th_pci_driver = {
318 	.name		= DRIVER_NAME,
319 	.id_table	= intel_th_pci_id_table,
320 	.probe		= intel_th_pci_probe,
321 	.remove		= intel_th_pci_remove,
322 };
323 
324 module_pci_driver(intel_th_pci_driver);
325 
326 MODULE_LICENSE("GPL v2");
327 MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
328 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
329