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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
20enum {
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
31static 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
52static 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
71static 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
114static 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
123static const struct intel_th_drvdata intel_th_1x_multi_is_broken = {
124 .multi_is_broken = 1,
125};
126
127static const struct intel_th_drvdata intel_th_2x = {
128 .tscu_enable = 1,
129 .has_mintctl = 1,
130};
131
132static 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 { 0 },
267};
268
269MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
270
271static struct pci_driver intel_th_pci_driver = {
272 .name = DRIVER_NAME,
273 .id_table = intel_th_pci_id_table,
274 .probe = intel_th_pci_probe,
275 .remove = intel_th_pci_remove,
276};
277
278module_pci_driver(intel_th_pci_driver);
279
280MODULE_LICENSE("GPL v2");
281MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
282MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");