[PATCH v7 1/2] tpm_tis: Move ilb_base_addr to tpm_tis_data

From: Azhar Shaikh
Date: Fri Dec 22 2017 - 15:14:17 EST

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Previous message: Azhar Shaikh: "[PATCH v6 0/2] Fix corner cases with disabling CLKRUN in tpm_tis"
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Move static variable ilb_base_addr to tpm_tis_data.

Signed-off-by: Azhar Shaikh <azhar.shaikh@xxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
---
drivers/char/tpm/tpm_tis.c | 75 +++++++++++++++--------------------------
drivers/char/tpm/tpm_tis_core.c | 16 ++++++++-
drivers/char/tpm/tpm_tis_core.h | 13 +++++++
3 files changed, 56 insertions(+), 48 deletions(-)

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index e2d1055fb814..923f8f2cbaca 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -134,33 +134,24 @@ static int check_acpi_tpm2(struct device *dev)
#endif

#ifdef CONFIG_X86
-#define INTEL_LEGACY_BLK_BASE_ADDR 0xFED08000
-#define ILB_REMAP_SIZE 0x100
-#define LPC_CNTRL_REG_OFFSET 0x84
-#define LPC_CLKRUN_EN (1 << 2)
-
-static void __iomem *ilb_base_addr;
-
-static inline bool is_bsw(void)
-{
- return ((boot_cpu_data.x86_model == INTEL_FAM6_ATOM_AIRMONT) ? 1 : 0);
-}
+#define LPC_CNTRL_OFFSET 0x84
+#define LPC_CLKRUN_EN (1 << 2)

/**
* tpm_platform_begin_xfer() - clear LPC CLKRUN_EN i.e. clocks will be running
*/
-static void tpm_platform_begin_xfer(void)
+static void tpm_platform_begin_xfer(struct tpm_tis_data *data)
{
u32 clkrun_val;

if (!is_bsw())
return;

- clkrun_val = ioread32(ilb_base_addr + LPC_CNTRL_REG_OFFSET);
+ clkrun_val = ioread32(data->ilb_base_addr + LPC_CNTRL_OFFSET);

/* Disable LPC CLKRUN# */
clkrun_val &= ~LPC_CLKRUN_EN;
- iowrite32(clkrun_val, ilb_base_addr + LPC_CNTRL_REG_OFFSET);
+ iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);

/*
* Write any random value on port 0x80 which is on LPC, to make
@@ -173,18 +164,18 @@ static void tpm_platform_begin_xfer(void)
/**
* tpm_platform_end_xfer() - set LPC CLKRUN_EN i.e. clocks can be turned off
*/
-static void tpm_platform_end_xfer(void)
+static void tpm_platform_end_xfer(struct tpm_tis_data *data)
{
u32 clkrun_val;

if (!is_bsw())
return;

- clkrun_val = ioread32(ilb_base_addr + LPC_CNTRL_REG_OFFSET);
+ clkrun_val = ioread32(data->ilb_base_addr + LPC_CNTRL_OFFSET);

/* Enable LPC CLKRUN# */
clkrun_val |= LPC_CLKRUN_EN;
- iowrite32(clkrun_val, ilb_base_addr + LPC_CNTRL_REG_OFFSET);
+ iowrite32(clkrun_val, data->ilb_base_addr + LPC_CNTRL_OFFSET);

/*
* Write any random value on port 0x80 which is on LPC, to make
@@ -194,16 +185,11 @@ static void tpm_platform_end_xfer(void)

}
#else
-static inline bool is_bsw(void)
-{
- return false;
-}
-
-static void tpm_platform_begin_xfer(void)
+static void tpm_platform_begin_xfer(struct tpm_tis_data *data)
{
}

-static void tpm_platform_end_xfer(void)
+static void tpm_platform_end_xfer(struct tpm_tis_data *data)
{
}
#endif
@@ -213,12 +199,12 @@ static int tpm_tcg_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

- tpm_platform_begin_xfer();
+ tpm_platform_begin_xfer(data);

while (len--)
*result++ = ioread8(phy->iobase + addr);

- tpm_platform_end_xfer();
+ tpm_platform_end_xfer(data);

return 0;
}
@@ -228,12 +214,12 @@ static int tpm_tcg_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

- tpm_platform_begin_xfer();
+ tpm_platform_begin_xfer(data);

while (len--)
iowrite8(*value++, phy->iobase + addr);

- tpm_platform_end_xfer();
+ tpm_platform_end_xfer(data);

return 0;
}
@@ -242,11 +228,11 @@ static int tpm_tcg_read16(struct tpm_tis_data *data, u32 addr, u16 *result)
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

- tpm_platform_begin_xfer();
+ tpm_platform_begin_xfer(data);

*result = ioread16(phy->iobase + addr);

- tpm_platform_end_xfer();
+ tpm_platform_end_xfer(data);

return 0;
}
@@ -255,11 +241,11 @@ static int tpm_tcg_read32(struct tpm_tis_data *data, u32 addr, u32 *result)
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

- tpm_platform_begin_xfer();
+ tpm_platform_begin_xfer(data);

*result = ioread32(phy->iobase + addr);

- tpm_platform_end_xfer();
+ tpm_platform_end_xfer(data);

return 0;
}
@@ -268,11 +254,11 @@ static int tpm_tcg_write32(struct tpm_tis_data *data, u32 addr, u32 value)
{
struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

- tpm_platform_begin_xfer();
+ tpm_platform_begin_xfer(data);

iowrite32(value, phy->iobase + addr);

- tpm_platform_end_xfer();
+ tpm_platform_end_xfer(data);

return 0;
}
@@ -351,9 +337,13 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
+ struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);

tpm_chip_unregister(chip);
tpm_tis_remove(chip);
+ if (is_bsw())
+ iounmap(priv->ilb_base_addr);
+
}

static struct pnp_driver tis_pnp_driver = {
@@ -400,10 +390,14 @@ static int tpm_tis_plat_probe(struct platform_device *pdev)
static int tpm_tis_plat_remove(struct platform_device *pdev)
{
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
+ struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);

tpm_chip_unregister(chip);
tpm_tis_remove(chip);

+ if (is_bsw())
+ iounmap(priv->ilb_base_addr);
+
return 0;
}

@@ -461,11 +455,6 @@ static int __init init_tis(void)
if (rc)
goto err_force;

-#ifdef CONFIG_X86
- if (is_bsw())
- ilb_base_addr = ioremap(INTEL_LEGACY_BLK_BASE_ADDR,
- ILB_REMAP_SIZE);
-#endif
rc = platform_driver_register(&tis_drv);
if (rc)
goto err_platform;
@@ -484,10 +473,6 @@ static int __init init_tis(void)
err_platform:
if (force_pdev)
platform_device_unregister(force_pdev);
-#ifdef CONFIG_X86
- if (is_bsw())
- iounmap(ilb_base_addr);
-#endif
err_force:
return rc;
}
@@ -497,10 +482,6 @@ static void __exit cleanup_tis(void)
pnp_unregister_driver(&tis_pnp_driver);
platform_driver_unregister(&tis_drv);

-#ifdef CONFIG_X86
- if (is_bsw())
- iounmap(ilb_base_addr);
-#endif
if (force_pdev)
platform_device_unregister(force_pdev);
}
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index ae905d17c248..bea151844692 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -754,6 +754,13 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
priv->phy_ops = phy_ops;
dev_set_drvdata(&chip->dev, priv);

+ if (is_bsw()) {
+ priv->ilb_base_addr = ioremap(INTEL_LEGACY_BLK_BASE_ADDR,
+ ILB_REMAP_SIZE);
+ if (!priv->ilb_base_addr)
+ return -ENOMEM;
+ }
+
if (wait_startup(chip, 0) != 0) {
rc = -ENODEV;
goto out_err;
@@ -844,9 +851,16 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
}
}

- return tpm_chip_register(chip);
+ rc = tpm_chip_register(chip);
+ if (rc && is_bsw())
+ iounmap(priv->ilb_base_addr);
+
+ return rc;
out_err:
tpm_tis_remove(chip);
+ if (is_bsw())
+ iounmap(priv->ilb_base_addr);
+
return rc;
}
EXPORT_SYMBOL_GPL(tpm_tis_core_init);
diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h
index 6bbac319ff3b..458847f72758 100644
--- a/drivers/char/tpm/tpm_tis_core.h
+++ b/drivers/char/tpm/tpm_tis_core.h
@@ -79,6 +79,9 @@ enum tis_defaults {
#define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
#define TPM_RID(l) (0x0F04 | ((l) << 12))

+#define INTEL_LEGACY_BLK_BASE_ADDR 0xFED08000
+#define ILB_REMAP_SIZE 0x100
+
enum tpm_tis_flags {
TPM_TIS_ITPM_WORKAROUND = BIT(0),
};
@@ -89,6 +92,7 @@ struct tpm_tis_data {
int irq;
bool irq_tested;
unsigned int flags;
+ void __iomem *ilb_base_addr;
wait_queue_head_t int_queue;
wait_queue_head_t read_queue;
const struct tpm_tis_phy_ops *phy_ops;
@@ -144,6 +148,15 @@ static inline int tpm_tis_write32(struct tpm_tis_data *data, u32 addr,
return data->phy_ops->write32(data, addr, value);
}

+static inline bool is_bsw(void)
+{
+#ifdef CONFIG_X86
+ return ((boot_cpu_data.x86_model == INTEL_FAM6_ATOM_AIRMONT) ? 1 : 0);
+#else
+ return false;
+#endif
+}
+
void tpm_tis_remove(struct tpm_chip *chip);
int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
const struct tpm_tis_phy_ops *phy_ops,
--
1.9.1

Next message: Mathieu Desnoyers: "[RFC PATCH for 4.16 00/11] membarrier updates for 4.16"
Previous message: Azhar Shaikh: "[PATCH v6 0/2] Fix corner cases with disabling CLKRUN in tpm_tis"
In reply to: Azhar Shaikh: "[PATCH v7 2/2] tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]