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ANDROID: scsi: ufs: add vendor hook to override key reprogramming

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Some hardware has a way to restore all keyslots at once that is
significantly faster than restoring each keyslot individually, as is
done by blk_ksm_reprogram_all_keys().  Add a hook
"android_rvh_ufs_reprogram_all_keys" that allows overriding the
restoration of all keyslots after UFS reset.  This may sleep, so this
must be a "restricted" Android vendor hook rather than a regular one.

Note that currently this functionality can't be upstreamed, as support
for the hardware that needs it would need to be upstreamed first.

Bug: 162257402
Bug: 181905172
Change-Id: I0b25393a5131941f085892560e08a64e63cd1369
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers
2021-07-26 09:27:15 -07:00
parent 198e728044
commit e2e063f507
3 changed files with 15 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/android/vendor_hooks.c
View File

@@ -213,6 +213,7 @@ 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_reprogram_all_keys);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_prepare_command);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_update_sysfs);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_command);

12
drivers/scsi/ufs/ufshcd-crypto.c
View File

@@ -6,6 +6,9 @@
#include "ufshcd.h"
#include "ufshcd-crypto.h"
#undef CREATE_TRACE_POINTS
#include <trace/hooks/ufshcd.h>
/* Blk-crypto modes supported by UFS crypto */
static const struct ufs_crypto_alg_entry {
enum ufs_crypto_alg ufs_alg;
@@ -120,8 +123,13 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba)
return false;
/* Reset might clear all keys, so reprogram all the keys. */
if (hba->ksm.num_slots)
blk_ksm_reprogram_all_keys(&hba->ksm);
if (hba->ksm.num_slots) {
int err = -EOPNOTSUPP;
trace_android_rvh_ufs_reprogram_all_keys(hba, &err);
if (err == -EOPNOTSUPP)
blk_ksm_reprogram_all_keys(&hba->ksm);
}
if (hba->quirks & UFSHCD_QUIRK_BROKEN_CRYPTO_ENABLE)
return false;

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_reprogram_all_keys,
TP_PROTO(struct ufs_hba *hba, int *err),
TP_ARGS(hba, err), 1);
DECLARE_HOOK(android_vh_ufs_prepare_command,
TP_PROTO(struct ufs_hba *hba, struct request *rq,
struct ufshcd_lrb *lrbp, int *err),