Merge tag 'ffa-updates-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers

Arm FF-A updates for v6.15

This update primarily focuses on FF-A framework notification support
along with other improvements, including UUID handling enhancements
and various fixes.

1. FF-A framework notification upport

    - Adds support for multiple UUIDs per partition to register individual
      SRI callbacks.
    - Handles Rx buffer full framework notifications and provides a general
      interface for future extensions.

2. Improved multiple UUID/services per-partition handling

    - Adds support for UUID passing in FFA_MSG_SEND2, improving multiple
      UUID/service support in the driver.
    - Introduces a helper function to check whether a partition can
      receive REQUEST2 messages.

3. Partition handling generic improvements

    - Implements device unregistration for better partition cleanup.
    - Improves handling of the host partition presence in partition info.

4. FF-A version updates

    - Upgrades the driver version to FF-A v1.2.
    - Rejects major versions higher than the driver version as incompatible.

5. Big-Endian support fixes

    - Fixes big-endian issues in:
        __ffa_partition_info_regs_get()
        __ffa_partition_info_get()
    - Big-endian support is still incomplete, and only these changes can
      be verified without additional application/testing updates at the
      moment. We can discover all the partitions correctly with big-endian
      kernel now.

6. Miscellaneous fixes

    - Fixes function prototype misalignments in: sync_send_receive{,2}
    - Adds explicit type casting for return values from: FFA_VERSION
      and NOTIFICATION_INFO_GET
    - Corrects vCPU list parsing in ffa_notification_info_get().

7. UUID management in the driver and DMA mask updates

    - Replaces UUID buffer with the standard UUID format in ffa_partition_info
      structure.
    - Fixes a typo in some FF-A bus macros.
    - Sets dma_mask for FF-A devices.

In short, this update enhances notification handling, UUID support, and
overall robustness of the FF-A driver while addressing multiple fixes
and cleanups.

* tag 'ffa-updates-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: (23 commits)
  firmware: arm_ffa: Set dma_mask for ffa devices
  firmware: arm_ffa: Skip the first/partition ID when parsing vCPU list
  firmware: arm_ffa: Explicitly cast return value from NOTIFICATION_INFO_GET
  firmware: arm_ffa: Explicitly cast return value from FFA_VERSION before comparison
  firmware: arm_ffa: Handle ffa_notification_get correctly at virtual FF-A instance
  firmware: arm_ffa: Allow multiple UUIDs per partition to register SRI callback
  firmware: arm_ffa: Add support for handling framework notifications
  firmware: arm_ffa: Add support for {un,}registration of framework notifications
  firmware: arm_ffa: Stash ffa_device instead of notify_type in notifier_cb_info
  firmware: arm_ffa: Refactoring to prepare for framework notification support
  firmware: arm_ffa: Remove unnecessary declaration of ffa_partitions_cleanup()
  firmware: arm_ffa: Reject higher major version as incompatible
  firmware: arm_ffa: Upgrade FF-A version to v1.2 in the driver
  firmware: arm_ffa: Add support for passing UUID in FFA_MSG_SEND2
  firmware: arm_ffa: Helper to check if a partition can receive REQUEST2 messages
  firmware: arm_ffa: Unregister the FF-A devices when cleaning up the partitions
  firmware: arm_ffa: Handle the presence of host partition in the partition info
  firmware: arm_ffa: Refactor addition of partition information into XArray
  firmware: arm_ffa: Fix big-endian support in __ffa_partition_info_regs_get()
  firmware: arm_ffa: Fix big-endian support in __ffa_partition_info_get()
  ...

Link: https://lore.kernel.org/r/20250304105928.432997-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: arndb

drivers/firmware/arm_ffa/bus.c

@@ -15,7 +15,7 @@
 
 #include "common.h"
 
-#define SCMI_UEVENT_MODALIAS_FMT	"arm_ffa:%04x:%pUb"
+#define FFA_UEVENT_MODALIAS_FMT	"arm_ffa:%04x:%pUb"
 
 static DEFINE_IDA(ffa_bus_id);
 
@@ -68,7 +68,7 @@ static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *e
 {
 	const struct ffa_device *ffa_dev = to_ffa_dev(dev);
 
-	return add_uevent_var(env, "MODALIAS=" SCMI_UEVENT_MODALIAS_FMT,
+	return add_uevent_var(env, "MODALIAS=" FFA_UEVENT_MODALIAS_FMT,
 			      ffa_dev->vm_id, &ffa_dev->uuid);
 }
 
@@ -77,7 +77,7 @@ static ssize_t modalias_show(struct device *dev,
 {
 	struct ffa_device *ffa_dev = to_ffa_dev(dev);
 
-	return sysfs_emit(buf, SCMI_UEVENT_MODALIAS_FMT, ffa_dev->vm_id,
+	return sysfs_emit(buf, FFA_UEVENT_MODALIAS_FMT, ffa_dev->vm_id,
 			  &ffa_dev->uuid);
 }
 static DEVICE_ATTR_RO(modalias);
@@ -160,11 +160,12 @@ static int __ffa_devices_unregister(struct device *dev, void *data)
 	return 0;
 }
 
-static void ffa_devices_unregister(void)
+void ffa_devices_unregister(void)
 {
 	bus_for_each_dev(&ffa_bus_type, NULL, NULL,
 			 __ffa_devices_unregister);
 }
+EXPORT_SYMBOL_GPL(ffa_devices_unregister);
 
 bool ffa_device_is_valid(struct ffa_device *ffa_dev)
 {
@@ -192,7 +193,6 @@ ffa_device_register(const struct ffa_partition_info *part_info,
 		    const struct ffa_ops *ops)
 {
 	int id, ret;
-	uuid_t uuid;
 	struct device *dev;
 	struct ffa_device *ffa_dev;
 
@@ -212,14 +212,14 @@ ffa_device_register(const struct ffa_partition_info *part_info,
 	dev = &ffa_dev->dev;
 	dev->bus = &ffa_bus_type;
 	dev->release = ffa_release_device;
+	dev->dma_mask = &dev->coherent_dma_mask;
 	dev_set_name(&ffa_dev->dev, "arm-ffa-%d", id);
 
 	ffa_dev->id = id;
 	ffa_dev->vm_id = part_info->id;
 	ffa_dev->properties = part_info->properties;
 	ffa_dev->ops = ops;
-	import_uuid(&uuid, (u8 *)part_info->uuid);
-	uuid_copy(&ffa_dev->uuid, &uuid);
+	uuid_copy(&ffa_dev->uuid, &part_info->uuid);
 
 	ret = device_register(&ffa_dev->dev);
 	if (ret) {