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Subject[PATCH] tpm, tpm_crb: migrate to struct acpi_table_tpm2 and acpi_tpm2_control
Date
Migrate to struct acpi_table_tpm2 and struct acpi_tpm2_control defined
in include/acpi/actbl3.h from the internal structures.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm_crb.c | 64 +++++++++++++++-------------------------------
1 file changed, 21 insertions(+), 43 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index b26ceee..0cbc944 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2014 Intel Corporation
+ * Copyright (C) 2014, 2015 Intel Corporation
*
* Authors:
* Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
@@ -20,10 +20,9 @@
#include <linux/rculist.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <acpi/actbl3.h>
#include "tpm.h"

-#define ACPI_SIG_TPM2 "TPM2"
-
static const u8 CRB_ACPI_START_UUID[] = {
/* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
/* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
@@ -40,14 +39,6 @@ enum crb_start_method {
CRB_SM_CRB_WITH_ACPI_START = 8,
};

-struct acpi_tpm2 {
- struct acpi_table_header hdr;
- u16 platform_class;
- u16 reserved;
- u64 control_area_pa;
- u32 start_method;
-} __packed;
-
enum crb_ca_request {
CRB_CA_REQ_GO_IDLE = BIT(0),
CRB_CA_REQ_CMD_READY = BIT(1),
@@ -66,19 +57,6 @@ enum crb_cancel {
CRB_CANCEL_INVOKE = BIT(0),
};

-struct crb_control_area {
- u32 req;
- u32 sts;
- u32 cancel;
- u32 start;
- u32 int_enable;
- u32 int_sts;
- u32 cmd_size;
- u64 cmd_pa;
- u32 rsp_size;
- u64 rsp_pa;
-} __packed;
-
enum crb_status {
CRB_STS_COMPLETE = BIT(0),
};
@@ -90,7 +68,7 @@ enum crb_flags {

struct crb_priv {
unsigned int flags;
- struct crb_control_area __iomem *cca;
+ struct acpi_tpm2_control __iomem *ctl;
u8 __iomem *cmd;
u8 __iomem *rsp;
};
@@ -102,7 +80,7 @@ static u8 crb_status(struct tpm_chip *chip)
struct crb_priv *priv = chip->vendor.priv;
u8 sts = 0;

- if ((le32_to_cpu(ioread32(&priv->cca->start)) & CRB_START_INVOKE) !=
+ if ((le32_to_cpu(ioread32(&priv->ctl->start)) & CRB_START_INVOKE) !=
CRB_START_INVOKE)
sts |= CRB_STS_COMPLETE;

@@ -118,7 +96,7 @@ static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count)
if (count < 6)
return -EIO;

- if (le32_to_cpu(ioread32(&priv->cca->sts)) & CRB_CA_STS_ERROR)
+ if (le32_to_cpu(ioread32(&priv->ctl->error)) & CRB_CA_STS_ERROR)
return -EIO;

memcpy_fromio(buf, priv->rsp, 6);
@@ -152,13 +130,13 @@ static int crb_do_acpi_start(struct tpm_chip *chip)
static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
struct crb_priv *priv = chip->vendor.priv;
+ u32 cmd_size = le32_to_cpu(ioread32(&priv->ctl->command_size));
int rc = 0;

- if (len > le32_to_cpu(ioread32(&priv->cca->cmd_size))) {
+ if (len > cmd_size) {
dev_err(&chip->dev,
"invalid command count value %x %zx\n",
- (unsigned int) len,
- (size_t) le32_to_cpu(ioread32(&priv->cca->cmd_size)));
+ (unsigned int) len, (size_t) cmd_size);
return -E2BIG;
}

@@ -168,7 +146,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len)
wmb();

if (priv->flags & CRB_FL_CRB_START)
- iowrite32(cpu_to_le32(CRB_START_INVOKE), &priv->cca->start);
+ iowrite32(cpu_to_le32(CRB_START_INVOKE), &priv->ctl->start);

if (priv->flags & CRB_FL_ACPI_START)
rc = crb_do_acpi_start(chip);
@@ -180,7 +158,7 @@ static void crb_cancel(struct tpm_chip *chip)
{
struct crb_priv *priv = chip->vendor.priv;

- iowrite32(cpu_to_le32(CRB_CANCEL_INVOKE), &priv->cca->cancel);
+ iowrite32(cpu_to_le32(CRB_CANCEL_INVOKE), &priv->ctl->cancel);

/* Make sure that cmd is populated before issuing cancel. */
wmb();
@@ -188,13 +166,13 @@ static void crb_cancel(struct tpm_chip *chip)
if ((priv->flags & CRB_FL_ACPI_START) && crb_do_acpi_start(chip))
dev_err(&chip->dev, "ACPI Start failed\n");

- iowrite32(0, &priv->cca->cancel);
+ iowrite32(0, &priv->ctl->cancel);
}

static bool crb_req_canceled(struct tpm_chip *chip, u8 status)
{
struct crb_priv *priv = chip->vendor.priv;
- u32 cancel = le32_to_cpu(ioread32(&priv->cca->cancel));
+ u32 cancel = le32_to_cpu(ioread32(&priv->ctl->cancel));

return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE;
}
@@ -212,7 +190,7 @@ static const struct tpm_class_ops tpm_crb = {
static int crb_acpi_add(struct acpi_device *device)
{
struct tpm_chip *chip;
- struct acpi_tpm2 *buf;
+ struct acpi_table_tpm2 *buf;
struct crb_priv *priv;
struct device *dev = &device->dev;
acpi_status status;
@@ -233,7 +211,7 @@ static int crb_acpi_add(struct acpi_device *device)
return -ENODEV;
}

- if (buf->hdr.length < sizeof(struct acpi_tpm2)) {
+ if (buf->header.length < sizeof(struct acpi_table_tpm2)) {
dev_err(dev, "TPM2 ACPI table has wrong size");
return -EINVAL;
}
@@ -258,26 +236,26 @@ static int crb_acpi_add(struct acpi_device *device)
if (sm == CRB_SM_ACPI_START || sm == CRB_SM_CRB_WITH_ACPI_START)
priv->flags |= CRB_FL_ACPI_START;

- priv->cca = (struct crb_control_area __iomem *)
- devm_ioremap_nocache(dev, buf->control_area_pa, 0x1000);
- if (!priv->cca) {
+ priv->ctl = (struct acpi_tpm2_control __iomem *)
+ devm_ioremap_nocache(dev, buf->control_address, PAGE_SIZE);
+ if (!priv->ctl) {
dev_err(dev, "ioremap of the control area failed\n");
return -ENOMEM;
}

- memcpy_fromio(&pa, &priv->cca->cmd_pa, 8);
+ memcpy_fromio(&pa, &priv->ctl->command_address, 8);
pa = le64_to_cpu(pa);
priv->cmd = devm_ioremap_nocache(dev, le64_to_cpu(pa),
- ioread32(&priv->cca->cmd_size));
+ ioread32(&priv->ctl->command_size));
if (!priv->cmd) {
dev_err(dev, "ioremap of the command buffer failed\n");
return -ENOMEM;
}

- memcpy_fromio(&pa, &priv->cca->rsp_pa, 8);
+ memcpy_fromio(&pa, &priv->ctl->response_address, 8);
pa = le64_to_cpu(pa);
priv->rsp = devm_ioremap_nocache(dev, le64_to_cpu(pa),
- ioread32(&priv->cca->rsp_size));
+ ioread32(&priv->ctl->response_size));
if (!priv->rsp) {
dev_err(dev, "ioremap of the response buffer failed\n");
return -ENOMEM;
--
2.1.4


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