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BACKPORT: FROMGIT: scsi: ufshcd: Let vendor override devfreq parameters

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Vendor drivers may have a need to update the polling interval and
thresholds.  Provide a vops for vendor drivers to use.

Bug: 152781094
(cherry picked from commit 2c75f9a5be53501a6e733cd72c1c46281eaa49a0
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/log/?h=5.7/scsi-queue)
Link: https://lore.kernel.org/r/acd79e00396cff855256adad47f615ccdbde85ac.1585160616.git.asutoshd@codeaurora.org
Acked-by: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Change-Id: Iaa41b1861a95d686fa0db6d5b7eb045ed14b531f
[can: Resolved minor conflict in drivers/scsi/ufs/ufshcd.h ]
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo 2020-04-01 00:07:43 -07:00 • committed by Todd Kjos
commit 02eb210229
2 changed files with 26 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/scsi/ufs/ufshcd.c
View file

@ -1349,6 +1349,17 @@ static struct devfreq_dev_profile ufs_devfreq_profile = {
.get_dev_status = ufshcd_devfreq_get_dev_status,
};
#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
static struct devfreq_simple_ondemand_data ufs_ondemand_data = {
.upthreshold = 70,
.downdifferential = 5,
};
static void *gov_data = &ufs_ondemand_data;
#else
static void *gov_data; /* NULL */
#endif
static int ufshcd_devfreq_init(struct ufs_hba *hba)
{
struct list_head *clk_list = &hba->clk_list_head;
@ -1364,10 +1375,12 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
dev_pm_opp_add(hba->dev, clki->min_freq, 0);
dev_pm_opp_add(hba->dev, clki->max_freq, 0);
ufshcd_vops_config_scaling_param(hba, &ufs_devfreq_profile,
gov_data);
devfreq = devfreq_add_device(hba->dev,
&ufs_devfreq_profile,
DEVFREQ_GOV_SIMPLE_ONDEMAND,
NULL);
gov_data);
if (IS_ERR(devfreq)) {
ret = PTR_ERR(devfreq);
dev_err(hba->dev, "Unable to register with devfreq %d\n", ret);

12
drivers/scsi/ufs/ufshcd.h
View file

@ -55,6 +55,7 @@
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/regulator/consumer.h>
#include <linux/devfreq.h>
#include <linux/bitfield.h>
#include "unipro.h"
@ -355,6 +356,9 @@ struct ufs_hba_variant_ops {
void (*device_reset)(struct ufs_hba *hba);
int (*program_key)(struct ufs_hba *hba,
const union ufs_crypto_cfg_entry *cfg, int slot);
void (*config_scaling_param)(struct ufs_hba *hba,
struct devfreq_dev_profile *profile,
void *data);
};
struct keyslot_mgmt_ll_ops;
@ -1181,6 +1185,14 @@ static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
}
}
static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
struct devfreq_dev_profile
*profile, void *data)
{
if (hba->vops && hba->vops->config_scaling_param)
hba->vops->config_scaling_param(hba, profile, data);
}
extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
/*