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path: root/drivers/char/tpm/tpm_tis.c
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* tpm_tis: fix the error handling of init_tis()Wei Yongjun2017-02-141-1/+1
| | | | | | | | | | | | Add the missing platform_driver_unregister() and remove the duplicate platform_device_unregister(force_pdev) in the error handling case. Fixes: 00194826e6be ("tpm_tis: Clean up the force=1 module parameter") Cc: stable@vger.kernel.org Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm_tis: use default timeout value if chip reports it as zeroMaciej S. Szmigiero2017-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Since commit 1107d065fdf1 ("tpm_tis: Introduce intermediate layer for TPM access") Atmel 3203 TPM on ThinkPad X61S (TPM firmware version 13.9) no longer works. The initialization proceeds fine until we get and start using chip-reported timeouts - and the chip reports C and D timeouts of zero. It turns out that until commit 8e54caf407b98e ("tpm: Provide a generic means to override the chip returned timeouts") we had actually let default timeout values remain in this case, so let's bring back this behavior to make chips like Atmel 3203 work again. Use a common code that was introduced by that commit so a warning is printed in this case and /sys/class/tpm/tpm*/timeouts correctly says the timeouts aren't chip-original. Fixes: 1107d065fdf1 ("tpm_tis: Introduce intermediate layer for TPM access") Cc: stable@vger.kernel.org Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm_tis: Allow tpm_tis to be bound using DTJason Gunthorpe2016-11-281-0/+11
| | | | | | | | | | | | This provides an open firwmare driver binding for tpm_tis. OF is useful on arches where ACPI/PNP is not used. The tcg,tpm-tis-mmio register map interface is specified by the TCG. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm/tpm_tis: Split tpm_tis driver into a core and TCG TIS compliant phyChristophe Ricard2016-06-251-882/+20Star
| | | | | | | | | | | | | | | | | | | | | To avoid code duplication between the old tpm_tis and the new and future native tcg tis driver(ie: spi, i2c...), the tpm_tis driver was reworked, so that all common logic is extracted and can be reused from all drivers. The core methods can also be used from other TIS like drivers. itpm workaround is now managed with a specific tis flag TPM_TIS_ITPM_POSSIBLE. This commit is based on the initial work by Peter Huewe. Signed-off-by: Peter Huewe <peter.huewe@infineon.com> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm_tis: Introduce intermediate layer for TPM accessChristophe Ricard2016-06-251-101/+219
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This splits tpm_tis in a high-level protocol part and a low-level interface for the actual TPM communication. The low-level interface can then be implemented by additional drivers to provide access to TPMs using other mechanisms, for example native I2C or SPI transfers, while still reusing the same TIS protocol implementation. Though the ioread/iowrite calls cannot fail, other implementations of this interface might want to return error codes if their communication fails. This follows the usual pattern of negative values representing errors and zero representing success. Positive values are not used (yet). Errors are passed back to the caller if possible. If the interface of a function does not allow that, it tries to do the most sensible thing it can, but this might also mean ignoring the error in this instance. This commit is based on the initial work by Peter Huewe. Signed-off-by: Alexander Steffen <Alexander.Steffen@infineon.com> Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: tpm_tis: Share common data between physChristophe Ricard2016-06-251-76/+95
| | | | | | | | | | | | | | | | | | Split priv_data structure in common and phy specific structures. This will allow in future patches to reuse the same tis logic on top of new phy such as spi and i2c. Ultimately, other drivers may reuse this tis logic. (e.g: st33zp24...) iobase field is specific to TPM addressed on 0xFED4xxxx on LPC/SPI bus. This commit is based on the initial work by Peter Huewe. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: Fix IRQ unwind ordering in TISJason Gunthorpe2016-06-251-2/+2
| | | | | | | | | | | | | | | The devm for the IRQ was placed on the chip, not the pdev. This can cause the irq to be still callable after the pdev has been cleaned up (eg priv kfree'd). Found by CONFIG_DEBUG_SHIRQ=y Reported-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Fixes: 233a065e0cd0 ("tpm: Get rid of chip->pdev") Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: Remove useless priv field in struct tpm_vendor_specificChristophe Ricard2016-06-251-23/+24
| | | | | | | | | | Remove useless priv field in struct tpm_vendor_specific and take benefit of chip->dev.driver_data. As priv is the latest field available in struct tpm_vendor_specific, remove any reference to that structure. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: Move tpm_vendor_specific data related with PTP specification to tpm_chipChristophe Ricard2016-06-251-12/+12
| | | | | | | | | | | | | Move tpm_vendor_specific data related to TCG PTP specification to tpm_chip. Move all fields directly linked with well known TCG concepts and used in TPM drivers (tpm_i2c_atmel, tpm_i2c_infineon, tpm_i2c_nuvoton, tpm_tis and xen-tpmfront) as well as in TPM core files (tpm-sysfs, tpm-interface and tpm2-cmd) in tpm_chip. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: drop 'locality' from struct tpm_vendor_specificChristophe Ricard2016-06-251-36/+35Star
| | | | | | | | | Dropped the field 'locality' from struct tpm_vendor_specific migrated it to the private structures of st33zp24, tpm_i2c_infineon and tpm_tis. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: drop 'read_queue' from struct tpm_vendor_specificChristophe Ricard2016-06-251-4/+5
| | | | | | | | | Dropped the field 'read_queue' from struct tpm_vendor_specific and make it available to the various private structures in the drivers. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: drop 'irq' from struct tpm_vendor_specificChristophe Ricard2016-06-251-13/+17
| | | | | | | | | | | | | | | | | Dropped the field 'irq' from struct tpm_vendor_specific and make it available to the various private structures in the drivers using irqs. A dedicated flag TPM_CHIP_FLAG_IRQ is added for the upper layers. In st33zp24, struct st33zp24_dev declaration is moved to st33zp24.h in order to make accessible irq from other phy's(i2c, spi). In tpm_i2c_nuvoton, chip->vendor.priv is not directly allocated. We can access irq field from priv_data in a cleaner way. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: drop 'iobase' from struct tpm_vendor_specificChristophe Ricard2016-06-251-42/+58
| | | | | | | | | | Dropped the field 'iobase' from struct tpm_vendor_specific and migrated it to the private structures of tpm_atmel and tpm_tis. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: drop manufacturer_id from struct tpm_vendor_specificJarkko Sakkinen2016-06-251-2/+5
| | | | | | | | | Dropped manufacturer_id from struct tpm_vendor_specific and redeclared it in the private struct priv_data that tpm_tis uses because the field is only used tpm_tis. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
* tpm: drop int_queue from tpm_vendor_specificJarkko Sakkinen2016-06-251-7/+12
| | | | | | | | | | Drop field int_queue from tpm_vendor_specific as it is used only by tpm_tis. Probably all of the fields should be eventually dropped and moved to the private structures of different drivers but it is better to do this one step at a time in order not to break anything. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
* tpm: fix crash in tpm_tis deinitializationJarkko Sakkinen2016-06-251-3/+0Star
| | | | | | | | | | | rmmod crashes the driver because tpm_chip_unregister() already sets ops to NULL. This commit fixes the issue by moving tpm2_shutdown() to tpm_chip_unregister(). This commit is also cleanup because it removes duplicate code from tpm_crb and tpm_tis to the core. Fixes: 4d3eac5e156a ("tpm: Provide strong locking for device removal") Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
* tpm: cleanup tpm_tis_remove()Jarkko Sakkinen2016-06-251-6/+4Star
| | | | | | | | | Created a local variable pointing to the INT_ENABLE_x register. The expression clearing INT_ENABLE_x.globalIntEnable is unreadable and hard to modify without surpassing the 80 char boundary. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Christophe Ricard <christophe-h.ricard@st.com>
* tpm: Get rid of devnameJason Gunthorpe2016-06-251-1/+1
| | | | | | | | | | | Now that we have a proper struct device just use dev_name() to access this value instead of keeping two copies. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm: Get rid of chip->pdevJason Gunthorpe2016-06-251-8/+8
| | | | | | | | | | | | | | | | | | | | This is a hold over from before the struct device conversion. - All prints should be using &chip->dev, which is the Linux standard. This changes prints to use tpm0 as the device name, not the PnP/etc ID. - The few places involving sysfs/modules that really do need the parent just use chip->dev.parent instead - We no longer need to get_device(pdev) in any places since it is no longer used by any of the code. The kref on the parent is held by the device core during device_add and dropped in device_del Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
* tpm_tis: fix build warning with tpm_tis_resumeJarkko Sakkinen2016-02-261-0/+2
| | | | | | | | | | drivers/char/tpm/tpm_tis.c:838: warning: ‘tpm_tis_resume’ defined but not used Reported-by: James Morris <jmorris@namei.org> Fixes: 00194826e6be ("tpm_tis: Clean up the force=1 module parameter") Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> cc: stable@vger.kernel.org
* tpm_crb/tis: fix: use dev_name() for /proc/iomemJarkko Sakkinen2016-02-201-1/+3
| | | | | | | | | In all cases use dev_name() for the mapped resources. This is both for sake of consistency and also with some platforms resource name given by ACPI object seems to return garbage. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Fixes: 1bd047be37d9 ("tpm_crb: Use devm_ioremap_resource")
* tpm_tis: Clean up the force=1 module parameterJason Gunthorpe2016-02-101-65/+104
| | | | | | | | | | | | | | | | | | | | | | | | | The TPM core has long assumed that every device has a driver attached, however the force path was attaching the TPM core outside of a driver context. This isn't generally reliable as the user could detatch the driver using sysfs or something, but commit b8b2c7d845d5 ("base/platform: assert that dev_pm_domain callbacks are called unconditionally") forced the issue by leaving the driver pointer NULL if there is no probe. Rework the TPM setup to create a platform device with resources and then allow the driver core to naturally bind and probe it through the normal mechanisms. All this structure is needed anyhow to enable TPM for OF environments. Finally, since the entire flow is changing convert the init/exit to use the modern ifdef-less coding style when possible Reported-by: "Wilck, Martin" <martin.wilck@ts.fujitsu.com> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Wilck, Martin <martin.wilck@ts.fujitsu.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Use devm_ioremap_resourceJason Gunthorpe2016-02-101-15/+18
| | | | | | | | | | | | | | | | | This does a request_resource under the covers which means tis holds a lock on the memory range it is using so other drivers cannot grab it. When doing probing it is important to ensure that other drivers are not using the same range before tis starts touching it. To do this flow the actual struct resource from the device right through to devm_ioremap_resource. This ensures all the proper resource meta-data is carried down. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Wilck, Martin <martin.wilck@ts.fujitsu.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Do not fall back to a hardcoded address for TPM2Jason Gunthorpe2016-02-101-30/+18Star
| | | | | | | | | | | | | | | If the ACPI tables do not declare a memory resource for the TPM2 then do not just fall back to the x86 default base address. Also be stricter when checking the ancillary TPM2 ACPI data and error out if any of this data is wrong rather than blindly assuming TPM1. Fixes: 399235dc6e95 ("tpm, tpm_tis: fix tpm_tis ACPI detection issue with TPM 2.0") Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Wilck, Martin <martin.wilck@ts.fujitsu.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Disable interrupt auto probing on a per-device basisJason Gunthorpe2016-02-101-8/+10
| | | | | | | | | | | | | Instead of clearing the global interrupts flag when any device does not have an interrupt just pass -1 through tpm_info.irq. The only thing that asks for autoprobing is the force=1 path. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Wilck, Martin <martin.wilck@ts.fujitsu.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_crb: Use the common ACPI definition of struct acpi_tpm2Jason Gunthorpe2016-02-101-1/+1
| | | | | | | | | | | | | | | | include/acpi/actbl2.h is the proper place for these definitions and the needed TPM2 ones have been there since commit 413d4a6defe0 ("ACPICA: Update TPM2 ACPI table") This also drops a couple of le32_to_cpu's for members of this table, the existing swapping was not done consistently, and the standard used by other Linux callers of acpi_get_table is unswapped. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Wilck, Martin <martin.wilck@ts.fujitsu.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: remove unneeded include of actbl2.hJerry Snitselaar2016-02-101-1/+0Star
| | | | | | | | | | tpm_tis.c already gets actbl2.h via linux/acpi.h -> acpi/acpi.h -> acpi/actbl.h -> acpi/actbl2.h, so the direct include in tpm_tis.c is not needed. Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com> Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Tighten IRQ auto-probingJason Gunthorpe2015-12-201-7/+12
| | | | | | | | | | | | | auto-probing doesn't work with shared interrupts, and the auto detection interrupt range is for x86 only. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Refactor the interrupt setupJason Gunthorpe2015-12-201-100/+84Star
| | | | | | | | | | | | | | | | | Now that the probe and run cases are merged together we can use a much simpler setup flow where probe and normal setup are done with exactly the same code. Since the new flow always calls tpm_gen_interrupt to confirm the IRQ there is also no longer any need to call tpm_get_timeouts twice. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Get rid of the duplicate IRQ probing codeJason Gunthorpe2015-12-201-44/+20Star
| | | | | | | | | | | | | The new code that works directly in tpm_tis_send is able to handle IRQ probing duties as well, so just use it for everything. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off--by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: rework tpm_get_timeouts()Jason Gunthorpe2015-12-201-17/+16Star
| | | | | | | | | | | | | | | | | | | | | IRQ probing needs to know that the TPM is working before trying to probe, so move tpm_get_timeouts() to the top of the tpm_tis_init(). This has the advantage of also getting the correct timeouts loaded before doing IRQ probing. All the timeout handling code is moved to tpm_get_timeouts() in order to remove duplicate code in tpm_tis and tpm_crb. [jarkko.sakkinen@linux.intel.com: squashed two patches together and improved the commit message.] Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Ensure interrupts are disabled when the driver startsJason Gunthorpe2015-12-201-11/+9Star
| | | | | | | | | | | | | | | This should be done very early, before anything could possibly cause the TPM to generate an interrupt. If the IRQ line is shared with another driver causing an interrupt before setting up our handler will be very bad. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: Use devm_free_irq not free_irqJason Gunthorpe2015-12-201-1/+1
| | | | | | | | | | | | | The interrupt is always allocated with devm_request_irq so it must always be freed with devm_free_irq. Fixes: 448e9c55c12d ("tpm_tis: verify interrupt during init") Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: restore IRQ vector in IO memory after failed probingMartin Wilck2015-11-091-1/+5
| | | | | | | | | | | | | | | If the probing finishes without success, it will leave the value 15 in the TPM_IRQ_VECTOR register. If the driver is unloaded and reloaded, it will "think" that the hardware had been programmed with IRQ 15, and will not probe again. This patch restores the original value in the IO memory if no IRQ is probed. Signed-off-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <PeterHuewe@gmx.de>
* tpm_tis: free irq after probingMartin Wilck2015-11-091-0/+2
| | | | | | | | | | | | Release IRQs used for probing only. Otherwise the TPM will end up with all IRQs 3-15 assigned. Fixes: afb5abc262e9 ("tpm: two-phase chip management functions") Signed-off-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <PeterHuewe@gmx.de>
* tpm, tpm_tis: fix tpm_tis ACPI detection issue with TPM 2.0Jarkko Sakkinen2015-10-191-29/+163
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both for FIFO and CRB interface TCG has decided to use the same HID MSFT0101. They can be differentiated by looking at the start method from TPM2 ACPI table. This patches makes necessary fixes to tpm_tis and tpm_crb modules in order to correctly detect, which module should be used. For MSFT0101 we must use struct acpi_driver because struct pnp_driver has a 7 character limitation. It turned out that the root cause in b371616b8 was not correct for https://bugzilla.kernel.org/show_bug.cgi?id=98181. v2: * One fixup was missing from v1: is_tpm2_fifo -> is_fifo v3: * Use pnp_driver for existing HIDs and acpi_driver only for MSFT0101 in order ensure backwards compatibility. v4: * Check for FIFO before doing *anything* in crb_acpi_add(). * There was return immediately after acpi_bus_unregister_driver() in cleanup_tis(). This caused pnp_unregister_driver() not to be called. Cc: stable@kernel.org Reported-by: Michael Saunders <mick.saunders@gmail.com> Reported-by: Michael Marley <michael@michaelmarley.com> Reported-by: Jethro Beekman <kernel@jbeekman.nl> Reported-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Michael Marley <michael@michaelmarley.com> Tested-by: Mimi Zohar <zohar@linux.vnet.ibm.com> (on TPM 1.2) Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm, tpm_tis: fix TPM 2.0 probingJarkko Sakkinen2015-02-151-7/+4Star
| | | | | | | | | | | | | | | If during transmission system error was returned, the logic was to incorrectly deduce that chip is a TPM 1.x chip. This patch fixes this issue. Also, this patch changes probing so that message tag is used as the measure for TPM 2.x, which should be much more stable. A separate function called tpm2_probe() is encapsulated because it can be used with any chipset. Fixes: aec04cbdf723 ("tpm: TPM 2.0 FIFO Interface") Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: fix suspend/resume paths for TPM 2.0Jarkko Sakkinen2015-02-151-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixed suspend/resume paths for TPM 2.0 and consolidated all the associated code to the tpm_pm_suspend() and tpm_pm_resume() functions. Resume path should be handled by the firmware, i.e. Startup(CLEAR) for hibernate and Startup(STATE) for suspend. There might be some non-PC embedded devices in the future where Startup() is not the handled by the FW but fixing the code for those IMHO should be postponed until there is hardware available to test the fixes although extra Startup in the driver code is essentially a NOP. Added Shutdown(CLEAR) to the remove paths of TIS and CRB drivers. Changed tpm2_shutdown() to a void function because there isn't much you can do except print an error message if this fails with a system error. Fixes: aec04cbdf723 ("tpm: TPM 2.0 FIFO Interface") Fixes: 30fc8d138e91 ("tpm: TPM 2.0 CRB Interface") [phuewe: both did send TPM_Shutdown on resume which 'disables' the TPM and did not send TPM2_Shutdown on teardown which leads some TPM2.0 to believe there was an attack (no TPM2_Shutdown = no orderly shutdown = attack)] Reported-by: Peter Hüwe <PeterHuewe@gmx.de> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm/tpm_tis: Add missing ifdef CONFIG_ACPI for pnp_acpi_devicePeter Huewe2015-01-221-0/+2
| | | | | | | | | | | | | | | | This fixes a build failure if CONFIG_PNP is set but CONFIG_ACPI is not: drivers/char/tpm/tpm_tis.c: In function ?tpm_tis_pnp_init?: drivers/char/tpm/tpm_tis.c:912:45: error: invalid type argument of ?->? (have ?int?) acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle; If CONFIG_PNPACPI is not set pnp_acpi_device is defined as 0 and thus accesing the handle is not possible. Fixes: 0dc553652102 ("tpm: fix raciness of PPI interface lookup") Reported-by: Jim Davis <jim.epost@gmail.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: James Morris <james.l.morris@oracle.com>
* tpm: TPM 2.0 FIFO InterfaceJarkko Sakkinen2015-01-171-23/+89
| | | | | | | | | | | | | | | | | | | Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe. Using STS3 is unreliable because some chips just report 0xff and not what the spec says. Before TPM family is detected, timeouts are set to the maximum values for both TPM 1.x and TPM 2.x. In addition to this, suspend/resume functionality is implemented for TPM 2.x. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Will Arthur <will.c.arthur@intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Tested-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: device class for tpmJarkko Sakkinen2015-01-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added own device class for TPM. Uses MISC_MAJOR:TPM_MINOR for the first character device in order to retain backwards compatibility. Added tpm_dev_release() back attached to the character device. I've been running this code now for a while on my laptop (Lenovo T430S) TrouSerS works perfectly without modifications. I don't believe it breaks anything significantly. The sysfs attributes that have been placed under the wrong place and are against sysfs-rules.txt should be probably left to stagnate under platform device directory and start defining new sysfs attributes to the char device directory. Guidelines for future TPM sysfs attributes should be probably along the lines of - Single flat set of mandatory sysfs attributes. For example, current PPI interface is way way too rich when you only want to use it to clear and activate the TPM. - Define sysfs attribute if and only if there's no way to get the value from ring-3. No attributes for TPM properties. It's just unnecessary maintenance hurdle that we don't want. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: rename chip->dev to chip->pdevJarkko Sakkinen2015-01-171-7/+7
| | | | | | | | | | | | | Rename chip->dev to chip->pdev to make it explicit that this not the character device but actually represents the platform device. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Peter Huewe <peterhuewe@gmx.de> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: fix raciness of PPI interface lookupJarkko Sakkinen2015-01-171-4/+10
| | | | | | | | | | | | | | | | Traversal of the ACPI device tree was not done right. PPI interface should be looked up only from the ACPI device that is the platform device for the TPM. This could cause problems with systems with two TPM chips such as 4th gen Intel systems. In addition, added the missing license and copyright platter to the tpm_ppi.c. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: two-phase chip management functionsJarkko Sakkinen2015-01-171-49/+31Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | tpm_register_hardware() and tpm_remove_hardware() are called often before initializing the device. The problem is that the device might not be fully initialized when it comes visible to the user space. This patch resolves the issue by diving initialization into two parts: - tpmm_chip_alloc() creates struct tpm_chip. - tpm_chip_register() sets up the character device and sysfs attributes. The framework takes care of freeing struct tpm_chip by using the devres API. The broken release callback has been wiped. ACPI drivers do not ever get this callback. Regards to Jason Gunthorpe for carefully reviewing this part of the code. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Peter Huewe <peterhuewe@gmx.de> [phuewe: update to upstream changes] Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm_tis: verify interrupt during initScot Doyle2015-01-171-14/+62
| | | | | | | | | | | | | | | | | Some machines, such as the Acer C720 and Toshiba CB35, have TPMs that do not send IRQs while also having an ACPI TPM entry indicating that they will be sent. These machines freeze on resume while the tpm_tis module waits for an IRQ, eventually timing out. When in interrupt mode, the tpm_tis module should receive an IRQ during module init. Fall back to polling mode if none is received when expected. Cc: <stable@vger.kernel.org> Signed-off-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Michael Mullin <masmullin@gmail.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> [phuewe: minor checkpatch fixed] Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* char: tpm: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0Star
| | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* tpm: Provide a generic means to override the chip returned timeoutsJason Gunthorpe2014-07-291-0/+31
| | | | | | | | | | | | | | | | Some Atmel TPMs provide completely wrong timeouts from their TPM_CAP_PROP_TIS_TIMEOUT query. This patch detects that and returns new correct values via a DID/VID table in the TIS driver. Tested on ARM using an AT97SC3204T FW version 37.16 Cc: <stable@vger.kernel.org> [PHuewe: without this fix these 'broken' Atmel TPMs won't function on older kernels] Signed-off-by: "Berg, Christopher" <Christopher.Berg@atmel.com> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: tpm_tis: Fix compile problems with CONFIG_PM_SLEEP/CONFIG_PNPJason Gunthorpe2014-01-061-5/+1Star
| | | | | | | | | | | | | | | | If CONFIG_PM_SLEEP=n, CONFIG_PNP=y we get this warning: drivers/char/tpm/tpm_tis.c:706:13: warning: 'tpm_tis_reenable_interrupts' defined but not used [-Wunused-function] This seems to have been introduced in a2fa3fb0d 'tpm: convert tpm_tis driver to use dev_pm_ops from legacy pm_ops' Also, unpon reviewing, the #ifdefs around tpm_tis_pm are not right, the first reference is protected, the second is not. tpm_tis_pm is always defined so we can drop the #ifdef. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: Create a tpm_class_ops structure and use it in the driversJason Gunthorpe2014-01-061-1/+1
| | | | | | | | | | | | | This replaces the static initialization of a tpm_vendor_specific structure in the drivers with the standard Linux idiom of providing a const structure of function pointers. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Reviewed-by: Ashley Lai <adlai@linux.vnet.ibm.com> [phuewe: did apply manually due to commit 191ffc6bde3 tpm/tpm_i2c_atmel: fix coccinelle warnings] Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
* tpm: Pull all driver sysfs code into tpm-sysfs.cJason Gunthorpe2014-01-061-30/+0Star
| | | | | | | | | | | | | | | | | The tpm core now sets up and controls all sysfs attributes, instead of having each driver have a unique take on it. All drivers now now have a uniform set of attributes, and no sysfs related entry points are exported from the tpm core module. This also uses the new method used to declare sysfs attributes with DEVICE_ATTR_RO and 'struct attribute *' Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> [phuewe: had to apply the tpm_i2c_atmel part manually due to commit 191ffc6bde3fc tpm/tpm_i2c_atmel: fix coccinelle warnings] Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
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