RE: [PATCH 4.15 118/146] tpm_tis: Move ilb_base_addr to tpm_tis_data

From: Shaikh, Azhar
Date: Tue Mar 13 2018 - 20:42:46 EST

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In reply to: Greg Kroah-Hartman: "[PATCH 4.15 118/146] tpm_tis: Move ilb_base_addr to tpm_tis_data"
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No objections from my side.

Please merge.

Regards,
Azhar Shaikh

>-----Original Message-----
>From: Greg Kroah-Hartman [mailto:gregkh@xxxxxxxxxxxxxxxxxxx]
>Sent: Tuesday, March 13, 2018 8:25 AM
>To: linux-kernel@xxxxxxxxxxxxxxx
>Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>;
>stable@xxxxxxxxxxxxxxx; Shaikh, Azhar <azhar.shaikh@xxxxxxxxx>; Jarkko
>Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
>Subject: [PATCH 4.15 118/146] tpm_tis: Move ilb_base_addr to tpm_tis_data
>
>4.15-stable review patch. If anyone has any objections, please let me know.
>
>------------------
>
>From: Azhar Shaikh <azhar.shaikh@xxxxxxxxx>
>
>commit c382babccba2c82fe57f9e647f290fb7bf4d130d upstream.
>
>Move static variable ilb_base_addr to tpm_tis_data.
>
>Cc: stable@xxxxxxxxxxxxxxx
>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>
>Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>
>---
> 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(-)
>
>--- 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 #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 {
> 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 tp {
> 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 {
> 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 {
> 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_ti {
> 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 @@ 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);
>+ 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 pla 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 @@ err_pnp:
> 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);
> }
>--- a/drivers/char/tpm/tpm_tis_core.c
>+++ b/drivers/char/tpm/tpm_tis_core.c
>@@ -701,6 +701,13 @@ int tpm_tis_core_init(struct device *dev
> 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;
>@@ -791,9 +798,16 @@ int tpm_tis_core_init(struct device *dev
> }
> }
>
>- 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);
>--- 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
> 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,
>

Next message: Shaikh, Azhar: "RE: [PATCH 4.14 019/140] tpm_tis: Move ilb_base_addr to tpm_tis_data"
Previous message: Shaikh, Azhar: "RE: [PATCH 4.14 020/140] tpm: Keep CLKRUN enabled throughout the duration of transmit_cmd()"
In reply to: Greg Kroah-Hartman: "[PATCH 4.15 118/146] tpm_tis: Move ilb_base_addr to tpm_tis_data"
Next in thread: Greg Kroah-Hartman: "[PATCH 4.15 122/146] tpm: only attempt to disable the LPC CLKRUN if is already enabled"
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