Contributors: 32
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jason Gunthorpe |
474 |
27.72% |
11 |
17.46% |
| Christophe Ricard |
234 |
13.68% |
6 |
9.52% |
| Kylene Jo Hall |
229 |
13.39% |
6 |
9.52% |
| Leendert van Doorn |
134 |
7.84% |
1 |
1.59% |
| Jarkko Sakkinen |
118 |
6.90% |
7 |
11.11% |
| Haris Okanovic |
107 |
6.26% |
1 |
1.59% |
| Johannes Holland |
105 |
6.14% |
1 |
1.59% |
| Randy Dunlap |
42 |
2.46% |
1 |
1.59% |
| Matthew Garrett |
41 |
2.40% |
1 |
1.59% |
| Rajiv Andrade |
33 |
1.93% |
3 |
4.76% |
| Wei Yongjun |
26 |
1.52% |
2 |
3.17% |
| Björn Helgaas |
24 |
1.40% |
1 |
1.59% |
| Stefan Berger |
24 |
1.40% |
3 |
4.76% |
| Hanjun Guo |
19 |
1.11% |
1 |
1.59% |
| Shuah Khan |
17 |
0.99% |
1 |
1.59% |
| Rafael J. Wysocki |
13 |
0.76% |
1 |
1.59% |
| Matt Domsch |
11 |
0.64% |
1 |
1.59% |
| Lukas Wunner |
7 |
0.41% |
1 |
1.59% |
| Marcin Obara |
7 |
0.41% |
1 |
1.59% |
| LE DISEZ Erwan |
7 |
0.41% |
1 |
1.59% |
| Zhen Lei |
6 |
0.35% |
1 |
1.59% |
| Lino Sanfilippo |
6 |
0.35% |
1 |
1.59% |
| Lei Ming |
5 |
0.29% |
1 |
1.59% |
| Scot Doyle |
4 |
0.23% |
1 |
1.59% |
| Jérémy Lefaure |
4 |
0.23% |
1 |
1.59% |
| Xiaoyan Zhang |
4 |
0.23% |
1 |
1.59% |
| Uwe Kleine-König |
2 |
0.12% |
1 |
1.59% |
| Thomas Gleixner |
2 |
0.12% |
1 |
1.59% |
| Linus Torvalds (pre-git) |
2 |
0.12% |
1 |
1.59% |
| Linus Torvalds |
1 |
0.06% |
1 |
1.59% |
| Hans de Goede |
1 |
0.06% |
1 |
1.59% |
| Ahelenia Ziemiańska |
1 |
0.06% |
1 |
1.59% |
| Total |
1710 |
|
63 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2005, 2006 IBM Corporation
* Copyright (C) 2014, 2015 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
* Kylene Hall <kjhall@us.ibm.com>
*
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
*
* Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org
*
* This device driver implements the TPM interface as defined in
* the TCG TPM Interface Spec version 1.2, revision 1.0.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/acpi.h>
#include <linux/freezer.h>
#include <linux/of.h>
#include <linux/kernel.h>
#include "tpm.h"
#include "tpm_tis_core.h"
struct tpm_info {
struct resource res;
/* irq > 0 means: use irq $irq;
* irq = 0 means: autoprobe for an irq;
* irq = -1 means: no irq support
*/
int irq;
};
struct tpm_tis_tcg_phy {
struct tpm_tis_data priv;
void __iomem *iobase;
};
static inline struct tpm_tis_tcg_phy *to_tpm_tis_tcg_phy(struct tpm_tis_data *data)
{
return container_of(data, struct tpm_tis_tcg_phy, priv);
}
#ifdef CONFIG_PREEMPT_RT
/*
* Flush previous write operations with a dummy read operation to the
* TPM MMIO base address.
*/
static inline void tpm_tis_flush(void __iomem *iobase)
{
ioread8(iobase + TPM_ACCESS(0));
}
#else
#define tpm_tis_flush(iobase) do { } while (0)
#endif
/*
* Write a byte word to the TPM MMIO address, and flush the write queue.
* The flush ensures that the data is sent immediately over the bus and not
* aggregated with further requests and transferred later in a batch. The large
* write requests can lead to unwanted latency spikes by blocking the CPU until
* the complete batch has been transferred.
*/
static inline void tpm_tis_iowrite8(u8 b, void __iomem *iobase, u32 addr)
{
iowrite8(b, iobase + addr);
tpm_tis_flush(iobase);
}
/*
* Write a 32-bit word to the TPM MMIO address, and flush the write queue.
* The flush ensures that the data is sent immediately over the bus and not
* aggregated with further requests and transferred later in a batch. The large
* write requests can lead to unwanted latency spikes by blocking the CPU until
* the complete batch has been transferred.
*/
static inline void tpm_tis_iowrite32(u32 b, void __iomem *iobase, u32 addr)
{
iowrite32(b, iobase + addr);
tpm_tis_flush(iobase);
}
static bool interrupts;
module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
static bool itpm;
module_param(itpm, bool, 0444);
MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
static bool force;
#ifdef CONFIG_X86
module_param(force, bool, 0444);
MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
#endif
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int has_hid(struct acpi_device *dev, const char *hid)
{
struct acpi_hardware_id *id;
list_for_each_entry(id, &dev->pnp.ids, list)
if (!strcmp(hid, id->id))
return 1;
return 0;
}
static inline int is_itpm(struct acpi_device *dev)
{
if (!dev)
return 0;
return has_hid(dev, "INTC0102");
}
#else
static inline int is_itpm(struct acpi_device *dev)
{
return 0;
}
#endif
#if defined(CONFIG_ACPI)
#define DEVICE_IS_TPM2 1
static const struct acpi_device_id tpm_acpi_tbl[] = {
{"MSFT0101", DEVICE_IS_TPM2},
{},
};
MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);
static int check_acpi_tpm2(struct device *dev)
{
const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev);
struct acpi_table_tpm2 *tbl;
acpi_status st;
int ret = 0;
if (!aid || aid->driver_data != DEVICE_IS_TPM2)
return 0;
/* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2
* table is mandatory
*/
st = acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) {
dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n");
return -EINVAL;
}
/* The tpm2_crb driver handles this device */
if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)
ret = -ENODEV;
acpi_put_table((struct acpi_table_header *)tbl);
return ret;
}
#else
static int check_acpi_tpm2(struct device *dev)
{
return 0;
}
#endif
static int tpm_tcg_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
u8 *result, enum tpm_tis_io_mode io_mode)
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
__le16 result_le16;
__le32 result_le32;
switch (io_mode) {
case TPM_TIS_PHYS_8:
while (len--)
*result++ = ioread8(phy->iobase + addr);
break;
case TPM_TIS_PHYS_16:
result_le16 = cpu_to_le16(ioread16(phy->iobase + addr));
memcpy(result, &result_le16, sizeof(u16));
break;
case TPM_TIS_PHYS_32:
result_le32 = cpu_to_le32(ioread32(phy->iobase + addr));
memcpy(result, &result_le32, sizeof(u32));
break;
}
return 0;
}
static int tpm_tcg_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
const u8 *value, enum tpm_tis_io_mode io_mode)
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
switch (io_mode) {
case TPM_TIS_PHYS_8:
while (len--)
tpm_tis_iowrite8(*value++, phy->iobase, addr);
break;
case TPM_TIS_PHYS_16:
return -EINVAL;
case TPM_TIS_PHYS_32:
tpm_tis_iowrite32(le32_to_cpu(*((__le32 *)value)), phy->iobase, addr);
break;
}
return 0;
}
static const struct tpm_tis_phy_ops tpm_tcg = {
.read_bytes = tpm_tcg_read_bytes,
.write_bytes = tpm_tcg_write_bytes,
};
static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info)
{
struct tpm_tis_tcg_phy *phy;
int irq = -1;
int rc;
rc = check_acpi_tpm2(dev);
if (rc)
return rc;
phy = devm_kzalloc(dev, sizeof(struct tpm_tis_tcg_phy), GFP_KERNEL);
if (phy == NULL)
return -ENOMEM;
phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);
if (IS_ERR(phy->iobase))
return PTR_ERR(phy->iobase);
if (interrupts)
irq = tpm_info->irq;
if (itpm || is_itpm(ACPI_COMPANION(dev)))
set_bit(TPM_TIS_ITPM_WORKAROUND, &phy->priv.flags);
return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
ACPI_HANDLE(dev));
}
static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
const struct pnp_device_id *pnp_id)
{
struct tpm_info tpm_info = {};
struct resource *res;
res = pnp_get_resource(pnp_dev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
tpm_info.res = *res;
if (pnp_irq_valid(pnp_dev, 0))
tpm_info.irq = pnp_irq(pnp_dev, 0);
else
tpm_info.irq = -1;
return tpm_tis_init(&pnp_dev->dev, &tpm_info);
}
/*
* There is a known bug caused by 93e1b7d42e1e ("[PATCH] tpm: add HID module
* parameter"). This commit added IFX0102 device ID, which is also used by
* tpm_infineon but ignored to add quirks to probe which driver ought to be
* used.
*/
static struct pnp_device_id tpm_pnp_tbl[] = {
{"PNP0C31", 0}, /* TPM */
{"ATM1200", 0}, /* Atmel */
{"IFX0102", 0}, /* Infineon */
{"BCM0101", 0}, /* Broadcom */
{"BCM0102", 0}, /* Broadcom */
{"NSC1200", 0}, /* National */
{"ICO0102", 0}, /* Intel */
/* Add new here */
{"", 0}, /* User Specified */
{"", 0} /* Terminator */
};
MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
tpm_chip_unregister(chip);
tpm_tis_remove(chip);
}
static struct pnp_driver tis_pnp_driver = {
.name = "tpm_tis",
.id_table = tpm_pnp_tbl,
.probe = tpm_tis_pnp_init,
.remove = tpm_tis_pnp_remove,
.driver = {
.pm = &tpm_tis_pm,
},
};
#define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
static struct platform_device *force_pdev;
static int tpm_tis_plat_probe(struct platform_device *pdev)
{
struct tpm_info tpm_info = {};
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no memory resource defined\n");
return -ENODEV;
}
tpm_info.res = *res;
tpm_info.irq = platform_get_irq_optional(pdev, 0);
if (tpm_info.irq <= 0) {
if (pdev != force_pdev)
tpm_info.irq = -1;
else
/* When forcing auto probe the IRQ */
tpm_info.irq = 0;
}
return tpm_tis_init(&pdev->dev, &tpm_info);
}
static void tpm_tis_plat_remove(struct platform_device *pdev)
{
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
tpm_chip_unregister(chip);
tpm_tis_remove(chip);
}
#ifdef CONFIG_OF
static const struct of_device_id tis_of_platform_match[] = {
{.compatible = "atmel,at97sc3204"},
{.compatible = "tcg,tpm-tis-mmio"},
{},
};
MODULE_DEVICE_TABLE(of, tis_of_platform_match);
#endif
static struct platform_driver tis_drv = {
.probe = tpm_tis_plat_probe,
.remove_new = tpm_tis_plat_remove,
.driver = {
.name = "tpm_tis",
.pm = &tpm_tis_pm,
.of_match_table = of_match_ptr(tis_of_platform_match),
.acpi_match_table = ACPI_PTR(tpm_acpi_tbl),
},
};
static int tpm_tis_force_device(void)
{
struct platform_device *pdev;
static const struct resource x86_resources[] = {
DEFINE_RES_MEM(0xFED40000, TIS_MEM_LEN)
};
if (!force)
return 0;
/* The driver core will match the name tpm_tis of the device to
* the tpm_tis platform driver and complete the setup via
* tpm_tis_plat_probe
*/
pdev = platform_device_register_simple("tpm_tis", -1, x86_resources,
ARRAY_SIZE(x86_resources));
if (IS_ERR(pdev))
return PTR_ERR(pdev);
force_pdev = pdev;
return 0;
}
static int __init init_tis(void)
{
int rc;
rc = tpm_tis_force_device();
if (rc)
goto err_force;
rc = platform_driver_register(&tis_drv);
if (rc)
goto err_platform;
if (IS_ENABLED(CONFIG_PNP)) {
rc = pnp_register_driver(&tis_pnp_driver);
if (rc)
goto err_pnp;
}
return 0;
err_pnp:
platform_driver_unregister(&tis_drv);
err_platform:
if (force_pdev)
platform_device_unregister(force_pdev);
err_force:
return rc;
}
static void __exit cleanup_tis(void)
{
pnp_unregister_driver(&tis_pnp_driver);
platform_driver_unregister(&tis_drv);
if (force_pdev)
platform_device_unregister(force_pdev);
}
module_init(init_tis);
module_exit(cleanup_tis);
MODULE_AUTHOR("Leendert van Doorn <leendert@watson.ibm.com>");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");