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scsi: ufs: Prepare to add HCI capabilities sysfs

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Prepare so we'll be able to read various other HCI registers.  While at it,
fix the HCPID & HCMID register names to stand for what they really are.
Also replace the pm_runtime_{get/put}_sync() calls in auto_hibern8_show to
ufshcd_rpm_{get/put}_sync() as any host controller register reads should.

Reviewed-by: Keoseong Park <keosung.park@samsung.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240811143757.2538212-2-avri.altman@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Avri Altman 2024-08-11 17:37:56 +03:00 committed by Martin K. Petersen
parent 992f988462
commit b9d104465a
2 changed files with 25 additions and 18 deletions
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38
drivers/ufs/core/ufs-sysfs.c
View file

@ -198,6 +198,24 @@ static u32 ufshcd_us_to_ahit(unsigned int timer)
FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, scale);
}
static int ufshcd_read_hci_reg(struct ufs_hba *hba, u32 *val, unsigned int reg)
{
down(&hba->host_sem);
if (!ufshcd_is_user_access_allowed(hba)) {
up(&hba->host_sem);
return -EBUSY;
}
ufshcd_rpm_get_sync(hba);
ufshcd_hold(hba);
*val = ufshcd_readl(hba, reg);
ufshcd_release(hba);
ufshcd_rpm_put_sync(hba);
up(&hba->host_sem);
return 0;
}
static ssize_t auto_hibern8_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -208,23 +226,11 @@ static ssize_t auto_hibern8_show(struct device *dev,
if (!ufshcd_is_auto_hibern8_supported(hba))
return -EOPNOTSUPP;
down(&hba->host_sem);
if (!ufshcd_is_user_access_allowed(hba)) {
ret = -EBUSY;
goto out;
}
ret = ufshcd_read_hci_reg(hba, &ahit, REG_AUTO_HIBERNATE_IDLE_TIMER);
if (ret)
return ret;
pm_runtime_get_sync(hba->dev);
ufshcd_hold(hba);
ahit = ufshcd_readl(hba, REG_AUTO_HIBERNATE_IDLE_TIMER);
ufshcd_release(hba);
pm_runtime_put_sync(hba->dev);
ret = sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
out:
up(&hba->host_sem);
return ret;
return sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
}
static ssize_t auto_hibern8_store(struct device *dev,

5
include/ufs/ufshci.h
View file

@ -25,8 +25,9 @@ enum {
REG_CONTROLLER_CAPABILITIES = 0x00,
REG_MCQCAP = 0x04,
REG_UFS_VERSION = 0x08,
REG_CONTROLLER_DEV_ID = 0x10,
REG_CONTROLLER_PROD_ID = 0x14,
REG_EXT_CONTROLLER_CAPABILITIES = 0x0C,
REG_CONTROLLER_PID = 0x10,
REG_CONTROLLER_MID = 0x14,
REG_AUTO_HIBERNATE_IDLE_TIMER = 0x18,
REG_INTERRUPT_STATUS = 0x20,
REG_INTERRUPT_ENABLE = 0x24,