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ANDROID: scsi: ufs: add complete init vendor hook

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Currently the core UFS driver does not have a vops to notify when the
device is operational. This commit introduces a hook, which serves to
notify device completing initialization and is ready to accept I/O.

This is required by the FIPS140-2 [1] self integrity test of inline
encryption engine, which must run whenever the host controller is reset.
The code requires sleeping while waiting for I/O to complete and allocating
some memory dynamically, which requires the vendor hook to be restricted.

[1] https://csrc.nist.gov/publications/detail/fips/140/2/final

Bug: 185809932
Signed-off-by: Konstantin Vyshetsky <vkon@google.com>
Change-Id: I6f476f9c2e2b50574d2898c3f1ef6b648d92df24
This commit is contained in:
Konstantin Vyshetsky
2021-08-25 15:42:09 -07:00
committed by Jaegeuk Kim
parent 7050ead570
commit e774e4eca6
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -214,6 +214,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_filemap_fault_cache_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_enable_thermal_genl_check);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_thermal_pm_notify_suspend);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_fill_prdt);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ufs_complete_init);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ufs_reprogram_all_keys);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_prepare_command);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_update_sysfs);

2
drivers/scsi/ufs/ufshcd.c
View File

@@ -8042,6 +8042,8 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool async)
ufshcd_auto_hibern8_enable(hba);
ufshpb_reset(hba);
trace_android_rvh_ufs_complete_init(hba);
out:
spin_lock_irqsave(hba->host->host_lock, flags);
if (ret)

4
include/trace/hooks/ufshcd.h
View File

@@ -19,6 +19,10 @@ DECLARE_HOOK(android_vh_ufs_fill_prdt,
unsigned int segments, int *err),
TP_ARGS(hba, lrbp, segments, err));
DECLARE_RESTRICTED_HOOK(android_rvh_ufs_complete_init,
TP_PROTO(struct ufs_hba *hba),
TP_ARGS(hba), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_ufs_reprogram_all_keys,
TP_PROTO(struct ufs_hba *hba, int *err),
TP_ARGS(hba, err), 1);