xref: /linux/drivers/hwtracing/intel_th/pci.c (revision 3adbb5718dd5264666ddbc2b9b43799d292e9cb6)
150352fa7SAlexander Shishkin // SPDX-License-Identifier: GPL-2.0
22b0b16d3SAlexander Shishkin /*
32b0b16d3SAlexander Shishkin  * Intel(R) Trace Hub pci driver
42b0b16d3SAlexander Shishkin  *
52b0b16d3SAlexander Shishkin  * Copyright (C) 2014-2015 Intel Corporation.
62b0b16d3SAlexander Shishkin  */
72b0b16d3SAlexander Shishkin 
82b0b16d3SAlexander Shishkin #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
92b0b16d3SAlexander Shishkin 
102b0b16d3SAlexander Shishkin #include <linux/types.h>
112b0b16d3SAlexander Shishkin #include <linux/module.h>
122b0b16d3SAlexander Shishkin #include <linux/device.h>
132b0b16d3SAlexander Shishkin #include <linux/sysfs.h>
142b0b16d3SAlexander Shishkin #include <linux/pci.h>
152b0b16d3SAlexander Shishkin 
162b0b16d3SAlexander Shishkin #include "intel_th.h"
172b0b16d3SAlexander Shishkin 
182b0b16d3SAlexander Shishkin #define DRIVER_NAME "intel_th_pci"
192b0b16d3SAlexander Shishkin 
20db73a059SAlexander Shishkin enum {
21db73a059SAlexander Shishkin 	TH_PCI_CONFIG_BAR	= 0,
22db73a059SAlexander Shishkin 	TH_PCI_STH_SW_BAR	= 2,
23fc027f4cSAlexander Shishkin 	TH_PCI_RTIT_BAR		= 4,
24db73a059SAlexander Shishkin };
25db73a059SAlexander Shishkin 
26db73a059SAlexander Shishkin #define BAR_MASK (BIT(TH_PCI_CONFIG_BAR) | BIT(TH_PCI_STH_SW_BAR))
272b0b16d3SAlexander Shishkin 
28a0e7df33SAlexander Shishkin #define PCI_REG_NPKDSC	0x80
29a0e7df33SAlexander Shishkin #define NPKDSC_TSACT	BIT(5)
30a0e7df33SAlexander Shishkin 
31a0e7df33SAlexander Shishkin static int intel_th_pci_activate(struct intel_th *th)
32a0e7df33SAlexander Shishkin {
33a0e7df33SAlexander Shishkin 	struct pci_dev *pdev = to_pci_dev(th->dev);
34a0e7df33SAlexander Shishkin 	u32 npkdsc;
35a0e7df33SAlexander Shishkin 	int err;
36a0e7df33SAlexander Shishkin 
37a0e7df33SAlexander Shishkin 	if (!INTEL_TH_CAP(th, tscu_enable))
38a0e7df33SAlexander Shishkin 		return 0;
39a0e7df33SAlexander Shishkin 
40a0e7df33SAlexander Shishkin 	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
41a0e7df33SAlexander Shishkin 	if (!err) {
42a0e7df33SAlexander Shishkin 		npkdsc |= NPKDSC_TSACT;
43a0e7df33SAlexander Shishkin 		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
44a0e7df33SAlexander Shishkin 	}
45a0e7df33SAlexander Shishkin 
46a0e7df33SAlexander Shishkin 	if (err)
47a0e7df33SAlexander Shishkin 		dev_err(&pdev->dev, "failed to read NPKDSC register\n");
48a0e7df33SAlexander Shishkin 
49a0e7df33SAlexander Shishkin 	return err;
50a0e7df33SAlexander Shishkin }
51a0e7df33SAlexander Shishkin 
52a0e7df33SAlexander Shishkin static void intel_th_pci_deactivate(struct intel_th *th)
53a0e7df33SAlexander Shishkin {
54a0e7df33SAlexander Shishkin 	struct pci_dev *pdev = to_pci_dev(th->dev);
55a0e7df33SAlexander Shishkin 	u32 npkdsc;
56a0e7df33SAlexander Shishkin 	int err;
57a0e7df33SAlexander Shishkin 
58a0e7df33SAlexander Shishkin 	if (!INTEL_TH_CAP(th, tscu_enable))
59a0e7df33SAlexander Shishkin 		return;
60a0e7df33SAlexander Shishkin 
61a0e7df33SAlexander Shishkin 	err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
62a0e7df33SAlexander Shishkin 	if (!err) {
63a0e7df33SAlexander Shishkin 		npkdsc |= NPKDSC_TSACT;
64a0e7df33SAlexander Shishkin 		err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
65a0e7df33SAlexander Shishkin 	}
66a0e7df33SAlexander Shishkin 
67a0e7df33SAlexander Shishkin 	if (err)
68a0e7df33SAlexander Shishkin 		dev_err(&pdev->dev, "failed to read NPKDSC register\n");
69a0e7df33SAlexander Shishkin }
70a0e7df33SAlexander Shishkin 
712b0b16d3SAlexander Shishkin static int intel_th_pci_probe(struct pci_dev *pdev,
722b0b16d3SAlexander Shishkin 			      const struct pci_device_id *id)
732b0b16d3SAlexander Shishkin {
743321371bSAlexander Shishkin 	struct intel_th_drvdata *drvdata = (void *)id->driver_data;
757b7036d4SAlexander Shishkin 	struct resource resource[TH_MMIO_END + TH_NVEC_MAX] = {
76db73a059SAlexander Shishkin 		[TH_MMIO_CONFIG]	= pdev->resource[TH_PCI_CONFIG_BAR],
77db73a059SAlexander Shishkin 		[TH_MMIO_SW]		= pdev->resource[TH_PCI_STH_SW_BAR],
78db73a059SAlexander Shishkin 	};
797b7036d4SAlexander Shishkin 	int err, r = TH_MMIO_SW + 1, i;
802b0b16d3SAlexander Shishkin 	struct intel_th *th;
812b0b16d3SAlexander Shishkin 
822b0b16d3SAlexander Shishkin 	err = pcim_enable_device(pdev);
832b0b16d3SAlexander Shishkin 	if (err)
842b0b16d3SAlexander Shishkin 		return err;
852b0b16d3SAlexander Shishkin 
862b0b16d3SAlexander Shishkin 	err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
872b0b16d3SAlexander Shishkin 	if (err)
882b0b16d3SAlexander Shishkin 		return err;
892b0b16d3SAlexander Shishkin 
90fc027f4cSAlexander Shishkin 	if (pdev->resource[TH_PCI_RTIT_BAR].start) {
91fc027f4cSAlexander Shishkin 		resource[TH_MMIO_RTIT] = pdev->resource[TH_PCI_RTIT_BAR];
92fc027f4cSAlexander Shishkin 		r++;
93fc027f4cSAlexander Shishkin 	}
94fc027f4cSAlexander Shishkin 
957b7036d4SAlexander Shishkin 	err = pci_alloc_irq_vectors(pdev, 1, 8, PCI_IRQ_ALL_TYPES);
967b7036d4SAlexander Shishkin 	if (err > 0)
977b7036d4SAlexander Shishkin 		for (i = 0; i < err; i++, r++) {
9862a59302SAlexander Shishkin 			resource[r].flags = IORESOURCE_IRQ;
997b7036d4SAlexander Shishkin 			resource[r].start = pci_irq_vector(pdev, i);
10062a59302SAlexander Shishkin 		}
10162a59302SAlexander Shishkin 
10262a59302SAlexander Shishkin 	th = intel_th_alloc(&pdev->dev, drvdata, resource, r);
1032b0b16d3SAlexander Shishkin 	if (IS_ERR(th))
1042b0b16d3SAlexander Shishkin 		return PTR_ERR(th);
1052b0b16d3SAlexander Shishkin 
106a0e7df33SAlexander Shishkin 	th->activate   = intel_th_pci_activate;
107a0e7df33SAlexander Shishkin 	th->deactivate = intel_th_pci_deactivate;
108a0e7df33SAlexander Shishkin 
109e9b2b3e7SAlexander Shishkin 	pci_set_master(pdev);
110e9b2b3e7SAlexander Shishkin 
1112b0b16d3SAlexander Shishkin 	return 0;
1122b0b16d3SAlexander Shishkin }
1132b0b16d3SAlexander Shishkin 
1142b0b16d3SAlexander Shishkin static void intel_th_pci_remove(struct pci_dev *pdev)
1152b0b16d3SAlexander Shishkin {
1162b0b16d3SAlexander Shishkin 	struct intel_th *th = pci_get_drvdata(pdev);
1172b0b16d3SAlexander Shishkin 
1182b0b16d3SAlexander Shishkin 	intel_th_free(th);
1197b7036d4SAlexander Shishkin 
1207b7036d4SAlexander Shishkin 	pci_free_irq_vectors(pdev);
1212b0b16d3SAlexander Shishkin }
1222b0b16d3SAlexander Shishkin 
123a0e7df33SAlexander Shishkin static const struct intel_th_drvdata intel_th_2x = {
124a0e7df33SAlexander Shishkin 	.tscu_enable	= 1,
1254c5bb6ebSAlexander Shishkin 	.has_mintctl	= 1,
126a0e7df33SAlexander Shishkin };
127a0e7df33SAlexander Shishkin 
1282b0b16d3SAlexander Shishkin static const struct pci_device_id intel_th_pci_id_table[] = {
1292b0b16d3SAlexander Shishkin 	{
1302b0b16d3SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
1312b0b16d3SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1322b0b16d3SAlexander Shishkin 	},
1332b0b16d3SAlexander Shishkin 	{
1342b0b16d3SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
1352b0b16d3SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1362b0b16d3SAlexander Shishkin 	},
1376396b912SAlexander Shishkin 	{
1386396b912SAlexander Shishkin 		/* Apollo Lake */
1396396b912SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
1406396b912SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1416396b912SAlexander Shishkin 	},
1423f040887SAlexander Shishkin 	{
1433f040887SAlexander Shishkin 		/* Broxton */
1443f040887SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
1453f040887SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1463f040887SAlexander Shishkin 	},
147aaa3ca82SAlexander Shishkin 	{
148aaa3ca82SAlexander Shishkin 		/* Broxton B-step */
149aaa3ca82SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
150aaa3ca82SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
151aaa3ca82SAlexander Shishkin 	},
1527a1a47ceSAlexander Shishkin 	{
1537a1a47ceSAlexander Shishkin 		/* Kaby Lake PCH-H */
1547a1a47ceSAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
1557a1a47ceSAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1567a1a47ceSAlexander Shishkin 	},
1575118ccd3SAlexander Shishkin 	{
1585118ccd3SAlexander Shishkin 		/* Denverton */
1595118ccd3SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
1605118ccd3SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
1615118ccd3SAlexander Shishkin 	},
162340837f9SAlexander Shishkin 	{
16324600840SAlexander Shishkin 		/* Lewisburg PCH */
16424600840SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
16524600840SAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
16624600840SAlexander Shishkin 	},
16724600840SAlexander Shishkin 	{
168164eb56eSAlexander Shishkin 		/* Lewisburg PCH */
169164eb56eSAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa226),
170164eb56eSAlexander Shishkin 		.driver_data = (kernel_ulong_t)0,
171164eb56eSAlexander Shishkin 	},
172164eb56eSAlexander Shishkin 	{
173340837f9SAlexander Shishkin 		/* Gemini Lake */
174340837f9SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
175a0e7df33SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
176340837f9SAlexander Shishkin 	},
17784331e13SAlexander Shishkin 	{
17884331e13SAlexander Shishkin 		/* Cannon Lake H */
17984331e13SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
180a0e7df33SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
18184331e13SAlexander Shishkin 	},
182efb3669eSAlexander Shishkin 	{
183efb3669eSAlexander Shishkin 		/* Cannon Lake LP */
184efb3669eSAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
185a0e7df33SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
186efb3669eSAlexander Shishkin 	},
187920ce7c3SAlexander Shishkin 	{
188920ce7c3SAlexander Shishkin 		/* Cedar Fork PCH */
189920ce7c3SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
190920ce7c3SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
191920ce7c3SAlexander Shishkin 	},
19259d08d00SAlexander Shishkin 	{
19359d08d00SAlexander Shishkin 		/* Ice Lake PCH */
19459d08d00SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x34a6),
19559d08d00SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
19659d08d00SAlexander Shishkin 	},
197e60e9a4bSAlexander Shishkin 	{
198e60e9a4bSAlexander Shishkin 		/* Comet Lake */
199e60e9a4bSAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x02a6),
200e60e9a4bSAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
201e60e9a4bSAlexander Shishkin 	},
2024aa5aed2SAlexander Shishkin 	{
203*3adbb571SAlexander Shishkin 		/* Comet Lake PCH */
204*3adbb571SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x06a6),
205*3adbb571SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
206*3adbb571SAlexander Shishkin 	},
207*3adbb571SAlexander Shishkin 	{
2084aa5aed2SAlexander Shishkin 		/* Ice Lake NNPI */
2094aa5aed2SAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x45c5),
2104aa5aed2SAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
2114aa5aed2SAlexander Shishkin 	},
2129c78255fSAlexander Shishkin 	{
2139c78255fSAlexander Shishkin 		/* Tiger Lake PCH */
2149c78255fSAlexander Shishkin 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa0a6),
2159c78255fSAlexander Shishkin 		.driver_data = (kernel_ulong_t)&intel_th_2x,
2169c78255fSAlexander Shishkin 	},
2172b0b16d3SAlexander Shishkin 	{ 0 },
2182b0b16d3SAlexander Shishkin };
2192b0b16d3SAlexander Shishkin 
2202b0b16d3SAlexander Shishkin MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
2212b0b16d3SAlexander Shishkin 
2222b0b16d3SAlexander Shishkin static struct pci_driver intel_th_pci_driver = {
2232b0b16d3SAlexander Shishkin 	.name		= DRIVER_NAME,
2242b0b16d3SAlexander Shishkin 	.id_table	= intel_th_pci_id_table,
2252b0b16d3SAlexander Shishkin 	.probe		= intel_th_pci_probe,
2262b0b16d3SAlexander Shishkin 	.remove		= intel_th_pci_remove,
2272b0b16d3SAlexander Shishkin };
2282b0b16d3SAlexander Shishkin 
2292b0b16d3SAlexander Shishkin module_pci_driver(intel_th_pci_driver);
2302b0b16d3SAlexander Shishkin 
2312b0b16d3SAlexander Shishkin MODULE_LICENSE("GPL v2");
2322b0b16d3SAlexander Shishkin MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
2332b0b16d3SAlexander Shishkin MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
234