Merge patch series "Add OP-TEE based RPMB driver for UFS devices"

Bean Huo <beanhuo@iokpp.de> says:

This patch series introduces OP-TEE based RPMB (Replay Protected
Memory Block) support for UFS devices, extending the kernel-level
secure storage capabilities that are currently available for eMMC
devices.

Previously, OP-TEE required a userspace supplicant to access RPMB
partitions, which created complex dependencies and reliability issues,
especially during early boot scenarios. Recent work by Linaro has
moved core supplicant functionality directly into the Linux kernel for
eMMC devices, eliminating userspace dependencies and enabling
immediate secure storage access. This series extends the same approach
to UFS devices, which are used in enterprise and mobile applications
that require secure storage capabilities.

Benefits:

 - Eliminates dependency on userspace supplicant for UFS RPMB access

 - Enables early boot secure storage access (e.g., fTPM, secure UEFI
   variables)

 - Provides kernel-level RPMB access as soon as UFS driver is
   initialized

 - Removes complex initramfs dependencies and boot ordering
   requirements

 - Ensures reliable and deterministic secure storage operations

 - Supports both built-in and modular fTPM configurations.

Prerequisites:
--------------

This patch series depends on commit 7e8242405b94 ("rpmb: move struct
rpmb_frame to common header") which has been merged into mainline
v6.18-rc2.

Link: https://patch.msgid.link/20251107230518.4060231-1-beanhuo@iokpp.de
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

2 files changed, 10 insertions, 7 deletions

diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h
index 245a6a829ce9..ab8f6c07b5a2 100644
--- a/include/ufs/ufs.h
+++ b/include/ufs/ufs.h
@@ -651,6 +651,11 @@ struct ufs_dev_info {
 	u8 rtt_cap; /* bDeviceRTTCap */
 
 	bool hid_sup;
+
+	/* Unique device ID string (manufacturer+model+serial+version+date) */
+	char *device_id;
+	u8 rpmb_io_size;
+	u8 rpmb_region_size[4];
 };
 
 #endif /* End of Header */
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 37b443d48528..19154228780b 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -828,6 +828,7 @@ enum ufshcd_mcq_opr {
  * @host: Scsi_Host instance of the driver
  * @dev: device handle
  * @ufs_device_wlun: WLUN that controls the entire UFS device.
+ * @ufs_rpmb_wlun: RPMB WLUN SCSI device
  * @hwmon_device: device instance registered with the hwmon core.
  * @curr_dev_pwr_mode: active UFS device power mode.
  * @uic_link_state: active state of the link to the UFS device.
@@ -940,8 +941,8 @@ enum ufshcd_mcq_opr {
  * @pm_qos_mutex: synchronizes PM QoS request and status updates
  * @critical_health_count: count of critical health exceptions
  * @dev_lvl_exception_count: count of device level exceptions since last reset
- * @dev_lvl_exception_id: vendor specific information about the
- * device level exception event.
+ * @dev_lvl_exception_id: vendor specific information about the device level exception event.
+ * @rpmbs: list of OP-TEE RPMB devices (one per RPMB region)
  */
 struct ufs_hba {
 	void __iomem *mmio_base;
@@ -959,6 +960,7 @@ struct ufs_hba {
 	struct Scsi_Host *host;
 	struct device *dev;
 	struct scsi_device *ufs_device_wlun;
+	struct scsi_device *ufs_rpmb_wlun;
 
 #ifdef CONFIG_SCSI_UFS_HWMON
 	struct device *hwmon_device;
@@ -1112,8 +1114,8 @@ struct ufs_hba {
 	int critical_health_count;
 	atomic_t dev_lvl_exception_count;
 	u64 dev_lvl_exception_id;
-
 	u32 vcc_off_delay_us;
+	struct list_head rpmbs;
 };
 
 /**
@@ -1427,10 +1429,6 @@ static inline int ufshcd_disable_host_tx_lcc(struct ufs_hba *hba)
 void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
 void ufshcd_fixup_dev_quirks(struct ufs_hba *hba,
 			     const struct ufs_dev_quirk *fixups);
-#define SD_ASCII_STD true
-#define SD_RAW false
-int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
-			    u8 **buf, bool ascii);
 
 void ufshcd_hold(struct ufs_hba *hba);
 void ufshcd_release(struct ufs_hba *hba);