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-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c81
-rw-r--r--drivers/char/tpm/tpm.h7
-rw-r--r--drivers/char/tpm/tpm_crb.c32
-rw-r--r--drivers/char/tpm/tpm_tis.c192
4 files changed, 229 insertions, 83 deletions
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 8a45e92ff60c..05222706dc66 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -404,18 +404,42 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info)
return rv;
}
-static void start_check_enables(struct smi_info *smi_info)
+static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
+{
+ smi_info->last_timeout_jiffies = jiffies;
+ mod_timer(&smi_info->si_timer, new_val);
+ smi_info->timer_running = true;
+}
+
+/*
+ * Start a new message and (re)start the timer and thread.
+ */
+static void start_new_msg(struct smi_info *smi_info, unsigned char *msg,
+ unsigned int size)
+{
+ smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
+ if (smi_info->thread)
+ wake_up_process(smi_info->thread);
+
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, size);
+}
+
+static void start_check_enables(struct smi_info *smi_info, bool start_timer)
{
unsigned char msg[2];
msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
- smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
+ if (start_timer)
+ start_new_msg(smi_info, msg, 2);
+ else
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
smi_info->si_state = SI_CHECKING_ENABLES;
}
-static void start_clear_flags(struct smi_info *smi_info)
+static void start_clear_flags(struct smi_info *smi_info, bool start_timer)
{
unsigned char msg[3];
@@ -424,7 +448,10 @@ static void start_clear_flags(struct smi_info *smi_info)
msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
msg[2] = WDT_PRE_TIMEOUT_INT;
- smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
+ if (start_timer)
+ start_new_msg(smi_info, msg, 3);
+ else
+ smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
smi_info->si_state = SI_CLEARING_FLAGS;
}
@@ -434,10 +461,8 @@ static void start_getting_msg_queue(struct smi_info *smi_info)
smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
smi_info->curr_msg->data_size = 2;
- smi_info->handlers->start_transaction(
- smi_info->si_sm,
- smi_info->curr_msg->data,
- smi_info->curr_msg->data_size);
+ start_new_msg(smi_info, smi_info->curr_msg->data,
+ smi_info->curr_msg->data_size);
smi_info->si_state = SI_GETTING_MESSAGES;
}
@@ -447,20 +472,11 @@ static void start_getting_events(struct smi_info *smi_info)
smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
smi_info->curr_msg->data_size = 2;
- smi_info->handlers->start_transaction(
- smi_info->si_sm,
- smi_info->curr_msg->data,
- smi_info->curr_msg->data_size);
+ start_new_msg(smi_info, smi_info->curr_msg->data,
+ smi_info->curr_msg->data_size);
smi_info->si_state = SI_GETTING_EVENTS;
}
-static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
-{
- smi_info->last_timeout_jiffies = jiffies;
- mod_timer(&smi_info->si_timer, new_val);
- smi_info->timer_running = true;
-}
-
/*
* When we have a situtaion where we run out of memory and cannot
* allocate messages, we just leave them in the BMC and run the system
@@ -470,11 +486,11 @@ static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
* Note that we cannot just use disable_irq(), since the interrupt may
* be shared.
*/
-static inline bool disable_si_irq(struct smi_info *smi_info)
+static inline bool disable_si_irq(struct smi_info *smi_info, bool start_timer)
{
if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
smi_info->interrupt_disabled = true;
- start_check_enables(smi_info);
+ start_check_enables(smi_info, start_timer);
return true;
}
return false;
@@ -484,7 +500,7 @@ static inline bool enable_si_irq(struct smi_info *smi_info)
{
if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
smi_info->interrupt_disabled = false;
- start_check_enables(smi_info);
+ start_check_enables(smi_info, true);
return true;
}
return false;
@@ -502,7 +518,7 @@ static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info)
msg = ipmi_alloc_smi_msg();
if (!msg) {
- if (!disable_si_irq(smi_info))
+ if (!disable_si_irq(smi_info, true))
smi_info->si_state = SI_NORMAL;
} else if (enable_si_irq(smi_info)) {
ipmi_free_smi_msg(msg);
@@ -518,7 +534,7 @@ static void handle_flags(struct smi_info *smi_info)
/* Watchdog pre-timeout */
smi_inc_stat(smi_info, watchdog_pretimeouts);
- start_clear_flags(smi_info);
+ start_clear_flags(smi_info, true);
smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
if (smi_info->intf)
ipmi_smi_watchdog_pretimeout(smi_info->intf);
@@ -870,8 +886,7 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
msg[1] = IPMI_GET_MSG_FLAGS_CMD;
- smi_info->handlers->start_transaction(
- smi_info->si_sm, msg, 2);
+ start_new_msg(smi_info, msg, 2);
smi_info->si_state = SI_GETTING_FLAGS;
goto restart;
}
@@ -901,7 +916,7 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
* disable and messages disabled.
*/
if (smi_info->supports_event_msg_buff || smi_info->irq) {
- start_check_enables(smi_info);
+ start_check_enables(smi_info, true);
} else {
smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
if (!smi_info->curr_msg)
@@ -1203,14 +1218,14 @@ static int smi_start_processing(void *send_info,
new_smi->intf = intf;
- /* Try to claim any interrupts. */
- if (new_smi->irq_setup)
- new_smi->irq_setup(new_smi);
-
/* Set up the timer that drives the interface. */
setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
+ /* Try to claim any interrupts. */
+ if (new_smi->irq_setup)
+ new_smi->irq_setup(new_smi);
+
/*
* Check if the user forcefully enabled the daemon.
*/
@@ -3515,7 +3530,7 @@ static int try_smi_init(struct smi_info *new_smi)
* Start clearing the flags before we enable interrupts or the
* timer to avoid racing with the timer.
*/
- start_clear_flags(new_smi);
+ start_clear_flags(new_smi, false);
/*
* IRQ is defined to be set when non-zero. req_events will
@@ -3817,7 +3832,7 @@ static void cleanup_one_si(struct smi_info *to_clean)
poll(to_clean);
schedule_timeout_uninterruptible(1);
}
- disable_si_irq(to_clean);
+ disable_si_irq(to_clean, false);
while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
poll(to_clean);
schedule_timeout_uninterruptible(1);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index f8319a0860fd..39be5acc9c48 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -115,6 +115,13 @@ enum tpm2_startup_types {
TPM2_SU_STATE = 0x0001,
};
+enum tpm2_start_method {
+ TPM2_START_ACPI = 2,
+ TPM2_START_FIFO = 6,
+ TPM2_START_CRB = 7,
+ TPM2_START_CRB_WITH_ACPI = 8,
+};
+
struct tpm_chip;
struct tpm_vendor_specific {
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 1267322595da..2b971b3e5c1c 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -34,12 +34,6 @@ enum crb_defaults {
CRB_ACPI_START_INDEX = 1,
};
-enum crb_start_method {
- CRB_SM_ACPI_START = 2,
- CRB_SM_CRB = 7,
- CRB_SM_CRB_WITH_ACPI_START = 8,
-};
-
struct acpi_tpm2 {
struct acpi_table_header hdr;
u16 platform_class;
@@ -220,12 +214,6 @@ static int crb_acpi_add(struct acpi_device *device)
u64 pa;
int rc;
- chip = tpmm_chip_alloc(dev, &tpm_crb);
- if (IS_ERR(chip))
- return PTR_ERR(chip);
-
- chip->flags = TPM_CHIP_FLAG_TPM2;
-
status = acpi_get_table(ACPI_SIG_TPM2, 1,
(struct acpi_table_header **) &buf);
if (ACPI_FAILURE(status)) {
@@ -233,13 +221,15 @@ static int crb_acpi_add(struct acpi_device *device)
return -ENODEV;
}
- /* At least some versions of AMI BIOS have a bug that TPM2 table has
- * zero address for the control area and therefore we must fail.
- */
- if (!buf->control_area_pa) {
- dev_err(dev, "TPM2 ACPI table has a zero address for the control area\n");
- return -EINVAL;
- }
+ /* Should the FIFO driver handle this? */
+ if (buf->start_method == TPM2_START_FIFO)
+ return -ENODEV;
+
+ chip = tpmm_chip_alloc(dev, &tpm_crb);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
+ chip->flags = TPM_CHIP_FLAG_TPM2;
if (buf->hdr.length < sizeof(struct acpi_tpm2)) {
dev_err(dev, "TPM2 ACPI table has wrong size");
@@ -259,11 +249,11 @@ static int crb_acpi_add(struct acpi_device *device)
* report only ACPI start but in practice seems to require both
* ACPI start and CRB start.
*/
- if (sm == CRB_SM_CRB || sm == CRB_SM_CRB_WITH_ACPI_START ||
+ if (sm == TPM2_START_CRB || sm == TPM2_START_FIFO ||
!strcmp(acpi_device_hid(device), "MSFT0101"))
priv->flags |= CRB_FL_CRB_START;
- if (sm == CRB_SM_ACPI_START || sm == CRB_SM_CRB_WITH_ACPI_START)
+ if (sm == TPM2_START_ACPI || sm == TPM2_START_CRB_WITH_ACPI)
priv->flags |= CRB_FL_ACPI_START;
priv->cca = (struct crb_control_area __iomem *)
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index f2dffa770b8e..696ef1d56b4f 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2005, 2006 IBM Corporation
- * Copyright (C) 2014 Intel Corporation
+ * Copyright (C) 2014, 2015 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
@@ -28,6 +28,7 @@
#include <linux/wait.h>
#include <linux/acpi.h>
#include <linux/freezer.h>
+#include <acpi/actbl2.h>
#include "tpm.h"
enum tis_access {
@@ -65,6 +66,17 @@ enum tis_defaults {
TIS_LONG_TIMEOUT = 2000, /* 2 sec */
};
+struct tpm_info {
+ unsigned long start;
+ unsigned long len;
+ unsigned int irq;
+};
+
+static struct tpm_info tis_default_info = {
+ .start = TIS_MEM_BASE,
+ .len = TIS_MEM_LEN,
+ .irq = 0,
+};
/* Some timeout values are needed before it is known whether the chip is
* TPM 1.0 or TPM 2.0.
@@ -91,26 +103,54 @@ struct priv_data {
};
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
-static int is_itpm(struct pnp_dev *dev)
+static int has_hid(struct acpi_device *dev, const char *hid)
{
- struct acpi_device *acpi = pnp_acpi_device(dev);
struct acpi_hardware_id *id;
- if (!acpi)
- return 0;
-
- list_for_each_entry(id, &acpi->pnp.ids, list) {
- if (!strcmp("INTC0102", 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)
+{
+ return has_hid(dev, "INTC0102");
+}
+
+static inline int is_fifo(struct acpi_device *dev)
+{
+ struct acpi_table_tpm2 *tbl;
+ acpi_status st;
+
+ /* TPM 1.2 FIFO */
+ if (!has_hid(dev, "MSFT0101"))
+ return 1;
+
+ st = acpi_get_table(ACPI_SIG_TPM2, 1,
+ (struct acpi_table_header **) &tbl);
+ if (ACPI_FAILURE(st)) {
+ dev_err(&dev->dev, "failed to get TPM2 ACPI table\n");
+ return 0;
+ }
+
+ if (le32_to_cpu(tbl->start_method) != TPM2_START_FIFO)
+ return 0;
+
+ /* TPM 2.0 FIFO */
+ return 1;
+}
#else
-static inline int is_itpm(struct pnp_dev *dev)
+static inline int is_itpm(struct acpi_device *dev)
{
return 0;
}
+
+static inline int is_fifo(struct acpi_device *dev)
+{
+ return 1;
+}
#endif
/* Before we attempt to access the TPM we must see that the valid bit is set.
@@ -600,9 +640,8 @@ static void tpm_tis_remove(struct tpm_chip *chip)
release_locality(chip, chip->vendor.locality, 1);
}
-static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
- resource_size_t start, resource_size_t len,
- unsigned int irq)
+static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
+ acpi_handle acpi_dev_handle)
{
u32 vendor, intfcaps, intmask;
int rc, i, irq_s, irq_e, probe;
@@ -622,7 +661,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
chip->acpi_dev_handle = acpi_dev_handle;
#endif
- chip->vendor.iobase = devm_ioremap(dev, start, len);
+ chip->vendor.iobase = devm_ioremap(dev, tpm_info->start, tpm_info->len);
if (!chip->vendor.iobase)
return -EIO;
@@ -707,7 +746,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
chip->vendor.iobase +
TPM_INT_ENABLE(chip->vendor.locality));
if (interrupts)
- chip->vendor.irq = irq;
+ chip->vendor.irq = tpm_info->irq;
if (interrupts && !chip->vendor.irq) {
irq_s =
ioread8(chip->vendor.iobase +
@@ -890,27 +929,27 @@ 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)
{
- resource_size_t start, len;
- unsigned int irq = 0;
+ struct tpm_info tpm_info = tis_default_info;
acpi_handle acpi_dev_handle = NULL;
- start = pnp_mem_start(pnp_dev, 0);
- len = pnp_mem_len(pnp_dev, 0);
+ tpm_info.start = pnp_mem_start(pnp_dev, 0);
+ tpm_info.len = pnp_mem_len(pnp_dev, 0);
if (pnp_irq_valid(pnp_dev, 0))
- irq = pnp_irq(pnp_dev, 0);
+ tpm_info.irq = pnp_irq(pnp_dev, 0);
else
interrupts = false;
- if (is_itpm(pnp_dev))
- itpm = true;
-
#ifdef CONFIG_ACPI
- if (pnp_acpi_device(pnp_dev))
+ if (pnp_acpi_device(pnp_dev)) {
+ if (is_itpm(pnp_acpi_device(pnp_dev)))
+ itpm = true;
+
acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle;
+ }
#endif
- return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq);
+ return tpm_tis_init(&pnp_dev->dev, &tpm_info, acpi_dev_handle);
}
static struct pnp_device_id tpm_pnp_tbl[] = {
@@ -930,6 +969,7 @@ 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);
}
@@ -950,6 +990,79 @@ module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
#endif
+#ifdef CONFIG_ACPI
+static int tpm_check_resource(struct acpi_resource *ares, void *data)
+{
+ struct tpm_info *tpm_info = (struct tpm_info *) data;
+ struct resource res;
+
+ if (acpi_dev_resource_interrupt(ares, 0, &res)) {
+ tpm_info->irq = res.start;
+ } else if (acpi_dev_resource_memory(ares, &res)) {
+ tpm_info->start = res.start;
+ tpm_info->len = resource_size(&res);
+ }
+
+ return 1;
+}
+
+static int tpm_tis_acpi_init(struct acpi_device *acpi_dev)
+{
+ struct list_head resources;
+ struct tpm_info tpm_info = tis_default_info;
+ int ret;
+
+ if (!is_fifo(acpi_dev))
+ return -ENODEV;
+
+ INIT_LIST_HEAD(&resources);
+ ret = acpi_dev_get_resources(acpi_dev, &resources, tpm_check_resource,
+ &tpm_info);
+ if (ret < 0)
+ return ret;
+
+ acpi_dev_free_resource_list(&resources);
+
+ if (!tpm_info.irq)
+ interrupts = false;
+
+ if (is_itpm(acpi_dev))
+ itpm = true;
+
+ return tpm_tis_init(&acpi_dev->dev, &tpm_info, acpi_dev->handle);
+}
+
+static int tpm_tis_acpi_remove(struct acpi_device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(&dev->dev);
+
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
+
+ return 0;
+}
+
+static struct acpi_device_id tpm_acpi_tbl[] = {
+ {"MSFT0101", 0}, /* TPM 2.0 */
+ /* Add new here */
+ {"", 0}, /* User Specified */
+ {"", 0} /* Terminator */
+};
+MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);
+
+static struct acpi_driver tis_acpi_driver = {
+ .name = "tpm_tis",
+ .ids = tpm_acpi_tbl,
+ .ops = {
+ .add = tpm_tis_acpi_init,
+ .remove = tpm_tis_acpi_remove,
+ },
+ .drv = {
+ .pm = &tpm_tis_pm,
+ },
+};
+#endif
+
static struct platform_driver tis_drv = {
.driver = {
.name = "tpm_tis",
@@ -966,9 +1079,25 @@ static int __init init_tis(void)
{
int rc;
#ifdef CONFIG_PNP
- if (!force)
- return pnp_register_driver(&tis_pnp_driver);
+ if (!force) {
+ rc = pnp_register_driver(&tis_pnp_driver);
+ if (rc)
+ return rc;
+ }
+#endif
+#ifdef CONFIG_ACPI
+ if (!force) {
+ rc = acpi_bus_register_driver(&tis_acpi_driver);
+ if (rc) {
+#ifdef CONFIG_PNP
+ pnp_unregister_driver(&tis_pnp_driver);
#endif
+ return rc;
+ }
+ }
+#endif
+ if (!force)
+ return 0;
rc = platform_driver_register(&tis_drv);
if (rc < 0)
@@ -978,7 +1107,7 @@ static int __init init_tis(void)
rc = PTR_ERR(pdev);
goto err_dev;
}
- rc = tpm_tis_init(&pdev->dev, NULL, TIS_MEM_BASE, TIS_MEM_LEN, 0);
+ rc = tpm_tis_init(&pdev->dev, &tis_default_info, NULL);
if (rc)
goto err_init;
return 0;
@@ -992,9 +1121,14 @@ err_dev:
static void __exit cleanup_tis(void)
{
struct tpm_chip *chip;
-#ifdef CONFIG_PNP
+#if defined(CONFIG_PNP) || defined(CONFIG_ACPI)
if (!force) {
+#ifdef CONFIG_ACPI
+ acpi_bus_unregister_driver(&tis_acpi_driver);
+#endif
+#ifdef CONFIG_PNP
pnp_unregister_driver(&tis_pnp_driver);
+#endif
return;
}
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-19 16:44:02 +0000