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ANDROID: scsi: ufs: Add hook to influence the UFS clock scaling policy

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Add a vendor hook in ufshcd_devfreq_target() to allow vendor modules to
influence the UFS clock scaling policy.

Bug: 192050146
Change-Id: Ice3e629e132460d240e07c2eba01307317d5aeca
Signed-off-by: Nitin Rawat <nitirawa@codeaurora.org>
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
This commit is contained in:
Nitin Rawat 2021-06-25 16:55:47 +05:30 committed by Todd Kjos
parent 00aec39e2e
commit 14dd90ab37
3 changed files with 10 additions and 1 deletions
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1
drivers/android/vendor_hooks.c
View File

@ -207,6 +207,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_uic_command);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_tm_command);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_check_int_errors);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_update_sdev);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_clock_scaling);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_wake_up_sync);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_wake_flags);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_uclamp_eff_get);

7
drivers/scsi/ufs/ufshcd.c
View File

@ -1288,6 +1288,8 @@ static int ufshcd_devfreq_target(struct device *dev,
struct list_head *clk_list = &hba->clk_list_head;
struct ufs_clk_info *clki;
unsigned long irq_flags;
bool force_out = false;
bool force_scaling = false;
if (!ufshcd_is_clkscaling_supported(hba))
return -EINVAL;
@ -1313,8 +1315,11 @@ static int ufshcd_devfreq_target(struct device *dev,
scale_up = (*freq == clki->max_freq) ? true : false;
if (!scale_up)
*freq = clki->min_freq;
trace_android_vh_ufs_clock_scaling(hba, &force_out, &force_scaling, &scale_up);
/* Update the frequency */
if (!ufshcd_is_devfreq_scaling_required(hba, scale_up)) {
if (force_out || (!force_scaling && !ufshcd_is_devfreq_scaling_required(hba, scale_up))) {
spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
ret = 0;
goto out; /* no state change required */

3
include/trace/hooks/ufshcd.h
View File

@ -55,6 +55,9 @@ DECLARE_HOOK(android_vh_ufs_update_sdev,
TP_PROTO(struct scsi_device *sdev),
TP_ARGS(sdev));
DECLARE_HOOK(android_vh_ufs_clock_scaling,
TP_PROTO(struct ufs_hba *hba, bool *force_out, bool *force_scaling, bool *scale_up),
TP_ARGS(hba, force_out, force_scaling, scale_up));
#endif /* _TRACE_HOOK_UFSHCD_H */
/* This part must be outside protection */
#include <trace/define_trace.h>