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Date: Wed, 23 Mar 2016 08:20:28 +0200
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: Peter Huewe <peterhuewe@....de>
Cc: Marcel Selhorst <tpmdd@...horst.net>,
Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
"moderated list:TPM DEVICE DRIVER"
<tpmdd-devel@...ts.sourceforge.net>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: drop 'base' from struct tpm_vendor_specific
On Wed, Mar 23, 2016 at 08:16:09AM +0200, Jarkko Sakkinen wrote:
> Dropped the field 'base' from struct tpm_vendor_specific and migrated
> it to the private structures of tpm_atmel and tpm_nsc.
>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Ugh, forgot the final step: removing the field from the struct.
Otherwise, this should be good (at least from my point of view).
/Jarkko
> ---
> drivers/char/tpm/tpm_atmel.c | 6 ++---
> drivers/char/tpm/tpm_atmel.h | 7 ++++--
> drivers/char/tpm/tpm_nsc.c | 57 +++++++++++++++++++++++++++++---------------
> 3 files changed, 46 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
> index affc04b..c6daf6c 100644
> --- a/drivers/char/tpm/tpm_atmel.c
> +++ b/drivers/char/tpm/tpm_atmel.c
> @@ -36,6 +36,7 @@ enum tpm_atmel_read_status {
> };
>
> struct tpm_atmel_priv {
> + unsigned long base;
> int region_size;
> int have_region;
> };
> @@ -146,8 +147,7 @@ static void atml_plat_remove(void)
> if (chip) {
> tpm_chip_unregister(chip);
> if (priv->have_region)
> - atmel_release_region(chip->vendor.base,
> - priv->region_size);
> + atmel_release_region(priv->base, priv->region_size);
> atmel_put_base_addr(chip->vendor.iobase);
> platform_device_unregister(pdev);
> }
> @@ -196,6 +196,7 @@ static int __init init_atmel(void)
> goto err_unreg_dev;
> }
>
> + priv->base = base;
> priv->have_region = have_region;
> priv->region_size = region_size;
>
> @@ -206,7 +207,6 @@ static int __init init_atmel(void)
> }
>
> chip->vendor.iobase = iobase;
> - chip->vendor.base = base;
> chip->vendor.priv = priv;
>
> rc = tpm_chip_register(chip);
> diff --git a/drivers/char/tpm/tpm_atmel.h b/drivers/char/tpm/tpm_atmel.h
> index 6c831f9..08607a6 100644
> --- a/drivers/char/tpm/tpm_atmel.h
> +++ b/drivers/char/tpm/tpm_atmel.h
> @@ -22,6 +22,8 @@
> *
> */
>
> +#define atmel_get_priv(chip) ((struct tpm_atmel_priv *) chip->vendor.priv)
> +
> #ifdef CONFIG_PPC64
>
> #include <asm/prom.h>
> @@ -78,8 +80,9 @@ static void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size)
> return ioremap(*base, *region_size);
> }
> #else
> -#define atmel_getb(chip, offset) inb(chip->vendor->base + offset)
> -#define atmel_putb(val, chip, offset) outb(val, chip->vendor->base + offset)
> +#define atmel_getb(chip, offset) inb(atmel_get_priv(chip)->base + offset)
> +#define atmel_putb(val, chip, offset) \
> + outb(val, atmel_get_priv(chip)->base + offset)
> #define atmel_request_region request_region
> #define atmel_release_region release_region
> /* Atmel definitions */
> diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
> index 766370b..8ccb1d5 100644
> --- a/drivers/char/tpm/tpm_nsc.c
> +++ b/drivers/char/tpm/tpm_nsc.c
> @@ -64,6 +64,13 @@ enum tpm_nsc_cmd_mode {
> NSC_COMMAND_EOC = 0x03,
> NSC_COMMAND_CANCEL = 0x22
> };
> +
> +struct tpm_nsc_priv {
> + unsigned long base;
> +};
> +
> +#define tpm_nsc_get_priv(chip) ((struct tpm_nsc_priv *) chip->vendor.priv)
> +
> /*
> * Wait for a certain status to appear
> */
> @@ -72,7 +79,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data)
> unsigned long stop;
>
> /* status immediately available check */
> - *data = inb(chip->vendor.base + NSC_STATUS);
> + *data = inb(tpm_nsc_get_priv(chip)->base + NSC_STATUS);
> if ((*data & mask) == val)
> return 0;
>
> @@ -80,7 +87,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data)
> stop = jiffies + 10 * HZ;
> do {
> msleep(TPM_TIMEOUT);
> - *data = inb(chip->vendor.base + 1);
> + *data = inb(tpm_nsc_get_priv(chip)->base + 1);
> if ((*data & mask) == val)
> return 0;
> }
> @@ -95,9 +102,9 @@ static int nsc_wait_for_ready(struct tpm_chip *chip)
> unsigned long stop;
>
> /* status immediately available check */
> - status = inb(chip->vendor.base + NSC_STATUS);
> + status = inb(tpm_nsc_get_priv(chip)->base + NSC_STATUS);
> if (status & NSC_STATUS_OBF)
> - status = inb(chip->vendor.base + NSC_DATA);
> + status = inb(tpm_nsc_get_priv(chip)->base + NSC_DATA);
> if (status & NSC_STATUS_RDY)
> return 0;
>
> @@ -105,9 +112,9 @@ static int nsc_wait_for_ready(struct tpm_chip *chip)
> stop = jiffies + 100;
> do {
> msleep(TPM_TIMEOUT);
> - status = inb(chip->vendor.base + NSC_STATUS);
> + status = inb(tpm_nsc_get_priv(chip)->base + NSC_STATUS);
> if (status & NSC_STATUS_OBF)
> - status = inb(chip->vendor.base + NSC_DATA);
> + status = inb(tpm_nsc_get_priv(chip)->base + NSC_DATA);
> if (status & NSC_STATUS_RDY)
> return 0;
> }
> @@ -132,8 +139,9 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
> dev_err(&chip->dev, "F0 timeout\n");
> return -EIO;
> }
> - if ((data =
> - inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
> +
> + data = inb(tpm_nsc_get_priv(chip)->base + NSC_DATA);
> + if (data != NSC_COMMAND_NORMAL) {
> dev_err(&chip->dev, "not in normal mode (0x%x)\n",
> data);
> return -EIO;
> @@ -149,7 +157,7 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
> }
> if (data & NSC_STATUS_F0)
> break;
> - *p = inb(chip->vendor.base + NSC_DATA);
> + *p = inb(tpm_nsc_get_priv(chip)->base + NSC_DATA);
> }
>
> if ((data & NSC_STATUS_F0) == 0 &&
> @@ -157,7 +165,9 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
> dev_err(&chip->dev, "F0 not set\n");
> return -EIO;
> }
> - if ((data = inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_EOC) {
> +
> + data = inb(tpm_nsc_get_priv(chip)->base + NSC_DATA);
> + if (data != NSC_COMMAND_EOC) {
> dev_err(&chip->dev,
> "expected end of command(0x%x)\n", data);
> return -EIO;
> @@ -183,7 +193,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
> * fix it. Not sure why this is needed, we followed the flow
> * chart in the manual to the letter.
> */
> - outb(NSC_COMMAND_CANCEL, chip->vendor.base + NSC_COMMAND);
> + outb(NSC_COMMAND_CANCEL, tpm_nsc_get_priv(chip)->base + NSC_COMMAND);
>
> if (nsc_wait_for_ready(chip) != 0)
> return -EIO;
> @@ -193,7 +203,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
> return -EIO;
> }
>
> - outb(NSC_COMMAND_NORMAL, chip->vendor.base + NSC_COMMAND);
> + outb(NSC_COMMAND_NORMAL, tpm_nsc_get_priv(chip)->base + NSC_COMMAND);
> if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
> dev_err(&chip->dev, "IBR timeout\n");
> return -EIO;
> @@ -205,26 +215,26 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
> "IBF timeout (while writing data)\n");
> return -EIO;
> }
> - outb(buf[i], chip->vendor.base + NSC_DATA);
> + outb(buf[i], tpm_nsc_get_priv(chip)->base + NSC_DATA);
> }
>
> if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
> dev_err(&chip->dev, "IBF timeout\n");
> return -EIO;
> }
> - outb(NSC_COMMAND_EOC, chip->vendor.base + NSC_COMMAND);
> + outb(NSC_COMMAND_EOC, tpm_nsc_get_priv(chip)->base + NSC_COMMAND);
>
> return count;
> }
>
> static void tpm_nsc_cancel(struct tpm_chip *chip)
> {
> - outb(NSC_COMMAND_CANCEL, chip->vendor.base + NSC_COMMAND);
> + outb(NSC_COMMAND_CANCEL, tpm_nsc_get_priv(chip)->base + NSC_COMMAND);
> }
>
> static u8 tpm_nsc_status(struct tpm_chip *chip)
> {
> - return inb(chip->vendor.base + NSC_STATUS);
> + return inb(tpm_nsc_get_priv(chip)->base + NSC_STATUS);
> }
>
> static bool tpm_nsc_req_canceled(struct tpm_chip *chip, u8 status)
> @@ -249,7 +259,7 @@ static void tpm_nsc_remove(struct device *dev)
> struct tpm_chip *chip = dev_get_drvdata(dev);
>
> tpm_chip_unregister(chip);
> - release_region(chip->vendor.base, 2);
> + release_region(tpm_nsc_get_priv(chip)->base, 2);
> }
>
> static SIMPLE_DEV_PM_OPS(tpm_nsc_pm, tpm_pm_suspend, tpm_pm_resume);
> @@ -268,6 +278,7 @@ static int __init init_nsc(void)
> int nscAddrBase = TPM_ADDR;
> struct tpm_chip *chip;
> unsigned long base;
> + struct tpm_nsc_priv *priv;
>
> /* verify that it is a National part (SID) */
> if (tpm_read_index(TPM_ADDR, NSC_SID_INDEX) != 0xEF) {
> @@ -301,6 +312,14 @@ static int __init init_nsc(void)
> if ((rc = platform_device_add(pdev)) < 0)
> goto err_put_dev;
>
> + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv) {
> + rc = -ENOMEM;
> + goto err_del_dev;
> + }
> +
> + priv->base = base;
> +
> if (request_region(base, 2, "tpm_nsc0") == NULL ) {
> rc = -EBUSY;
> goto err_del_dev;
> @@ -312,6 +331,8 @@ static int __init init_nsc(void)
> goto err_rel_reg;
> }
>
> + chip->vendor.priv = priv;
> +
> rc = tpm_chip_register(chip);
> if (rc)
> goto err_rel_reg;
> @@ -349,8 +370,6 @@ static int __init init_nsc(void)
> "NSC TPM revision %d\n",
> tpm_read_index(nscAddrBase, 0x27) & 0x1F);
>
> - chip->vendor.base = base;
> -
> return 0;
>
> err_rel_reg:
> --
> 2.7.3
>
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