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BACKPORT: scsi: ufs: Introduce event_notify variant function

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Introduce event_notify variant function to allow vendor to get notification
of important events and connect to any proprietary debugging facilities.

Bug: 188004633
Change-Id: I7e23fb0842c1c114be97286627ea1c241d66ea31
(cherry picked from commit 172614a9d0)
[Stanley: Resolved minor conflict in drivers/scsi/ufs/ufshcd.c]
Link: https://lore.kernel.org/r/20201205115901.26815-4-stanley.chu@mediatek.com
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Stanley Chu 2020-12-05 19:59:00 +08:00 • committed by Todd Kjos
commit c88e6599d2
2 changed files with 13 additions and 0 deletions
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2
drivers/scsi/ufs/ufshcd.c
View file

@ -4563,6 +4563,8 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val)
e->tstamp[e->pos] = ktime_get();
e->cnt += 1;
e->pos = (e->pos + 1) % UFS_EVENT_HIST_LENGTH;
ufshcd_vops_event_notify(hba, id, &val);
}
EXPORT_SYMBOL_GPL(ufshcd_update_evt_hist);

11
drivers/scsi/ufs/ufshcd.h
View file

@ -317,6 +317,7 @@ struct ufs_pwr_mode_info {
* @phy_initialization: used to initialize phys
* @device_reset: called to issue a reset pulse on the UFS device
* @program_key: program or evict an inline encryption key
* @event_notify: called to notify important events
*/
struct ufs_hba_variant_ops {
const char *name;
@ -352,6 +353,8 @@ struct ufs_hba_variant_ops {
void *data);
int (*program_key)(struct ufs_hba *hba,
const union ufs_crypto_cfg_entry *cfg, int slot);
void (*event_notify)(struct ufs_hba *hba,
enum ufs_event_type evt, void *data);
};
/* clock gating state */
@ -1151,6 +1154,14 @@ static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba,
return 0;
}
static inline void ufshcd_vops_event_notify(struct ufs_hba *hba,
enum ufs_event_type evt,
void *data)
{
if (hba->vops && hba->vops->event_notify)
hba->vops->event_notify(hba, evt, data);
}
static inline int ufshcd_vops_setup_clocks(struct ufs_hba *hba, bool on,
enum ufs_notify_change_status status)
{