[PATCH 4.9 20/61] scsi: ufs: refactor device descriptor reading

Greg Kroah-Hartman
2018-06-05T17:06:32Z

From: Tomas Winkler <tomas.winkler@intel.com>

commit 93fdd5ac64bbe80dac6416f048405362d7ef0945 upstream.

Pull device descriptor reading out of ufs quirk so it can be used also
for other purposes.

Revamp the fixup setup:

1. Rename ufs_device_info to ufs_dev_desc as very similar name
ufs_dev_info is already in use.

2. Make the handlers static as they are not used out of the ufshdc.c
file.

[mkp: applied by hand]

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Li Wei <liwei213@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/scsi/ufs/ufs.h | 12 ++++++++++++
drivers/scsi/ufs/ufs_quirks.h | 28 ++++++----------------------
drivers/scsi/ufs/ufshcd.c | 40 +++++++++++++++++++---------------------
3 files changed, 37 insertions(+), 43 deletions(-)

--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -522,4 +522,16 @@ struct ufs_dev_info {
bool is_lu_power_on_wp;
};

+#define MAX_MODEL_LEN 16
+/**
+ * ufs_dev_desc - ufs device details from the device descriptor
+ *
+ * @wmanufacturerid: card details
+ * @model: card model
+ */
+struct ufs_dev_desc {
+ u16 wmanufacturerid;
+ char model[MAX_MODEL_LEN + 1];
+};
+
#endif /* End of Header */
--- a/drivers/scsi/ufs/ufs_quirks.h
+++ b/drivers/scsi/ufs/ufs_quirks.h
@@ -21,41 +21,28 @@
#define UFS_ANY_VENDOR 0xFFFF
#define UFS_ANY_MODEL "ANY_MODEL"

-#define MAX_MODEL_LEN 16
-
#define UFS_VENDOR_TOSHIBA 0x198
#define UFS_VENDOR_SAMSUNG 0x1CE
#define UFS_VENDOR_SKHYNIX 0x1AD

/**
- * ufs_device_info - ufs device details
- * @wmanufacturerid: card details
- * @model: card model
- */
-struct ufs_device_info {
- u16 wmanufacturerid;
- char model[MAX_MODEL_LEN + 1];
-};
-
-/**
* ufs_dev_fix - ufs device quirk info
* @card: ufs card details
* @quirk: device quirk
*/
struct ufs_dev_fix {
- struct ufs_device_info card;
+ struct ufs_dev_desc card;
unsigned int quirk;
};

#define END_FIX { { 0 }, 0 }

/* add specific device quirk */
-#define UFS_FIX(_vendor, _model, _quirk) \
- { \
- .card.wmanufacturerid = (_vendor),\
- .card.model = (_model), \
- .quirk = (_quirk), \
- }
+#define UFS_FIX(_vendor, _model, _quirk) { \
+ .card.wmanufacturerid = (_vendor),\
+ .card.model = (_model), \
+ .quirk = (_quirk), \
+}

/*
* If UFS device is having issue in processing LCC (Line Control
@@ -144,7 +131,4 @@ struct ufs_dev_fix {
*/
#define UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME (1 << 8)

-struct ufs_hba;
-void ufs_advertise_fixup_device(struct ufs_hba *hba);
-
#endif /* UFS_QUIRKS_H_ */
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4906,8 +4906,8 @@ out:
return ret;
}

-static int ufs_get_device_info(struct ufs_hba *hba,
- struct ufs_device_info *card_data)
+static int ufs_get_device_desc(struct ufs_hba *hba,
+ struct ufs_dev_desc *dev_desc)
{
int err;
u8 model_index;
@@ -4926,7 +4926,7 @@ static int ufs_get_device_info(struct uf
* getting vendor (manufacturerID) and Bank Index in big endian
* format
*/
- card_data->wmanufacturerid = desc_buf[DEVICE_DESC_PARAM_MANF_ID] << 8 |
+ dev_desc->wmanufacturerid = desc_buf[DEVICE_DESC_PARAM_MANF_ID] << 8 |
desc_buf[DEVICE_DESC_PARAM_MANF_ID + 1];

model_index = desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME];
@@ -4940,36 +4940,26 @@ static int ufs_get_device_info(struct uf
}

str_desc_buf[QUERY_DESC_STRING_MAX_SIZE] = '\0';
- strlcpy(card_data->model, (str_desc_buf + QUERY_DESC_HDR_SIZE),
+ strlcpy(dev_desc->model, (str_desc_buf + QUERY_DESC_HDR_SIZE),
min_t(u8, str_desc_buf[QUERY_DESC_LENGTH_OFFSET],
MAX_MODEL_LEN));

/* Null terminate the model string */
- card_data->model[MAX_MODEL_LEN] = '\0';
+ dev_desc->model[MAX_MODEL_LEN] = '\0';

out:
return err;
}

-void ufs_advertise_fixup_device(struct ufs_hba *hba)
+static void ufs_fixup_device_setup(struct ufs_hba *hba,
+ struct ufs_dev_desc *dev_desc)
{
- int err;
struct ufs_dev_fix *f;
- struct ufs_device_info card_data;
-
- card_data.wmanufacturerid = 0;
-
- err = ufs_get_device_info(hba, &card_data);
- if (err) {
- dev_err(hba->dev, "%s: Failed getting device info. err = %d\n",
- __func__, err);
- return;
- }

for (f = ufs_fixups; f->quirk; f++) {
- if (((f->card.wmanufacturerid == card_data.wmanufacturerid) ||
- (f->card.wmanufacturerid == UFS_ANY_VENDOR)) &&
- (STR_PRFX_EQUAL(f->card.model, card_data.model) ||
+ if ((f->card.wmanufacturerid == dev_desc->wmanufacturerid ||
+ f->card.wmanufacturerid == UFS_ANY_VENDOR) &&
+ (STR_PRFX_EQUAL(f->card.model, dev_desc->model) ||
!strcmp(f->card.model, UFS_ANY_MODEL)))
hba->dev_quirks |= f->quirk;
}
@@ -5147,6 +5137,7 @@ static void ufshcd_tune_unipro_params(st
*/
static int ufshcd_probe_hba(struct ufs_hba *hba)
{
+ struct ufs_dev_desc card = {0};
int ret;

ret = ufshcd_link_startup(hba);
@@ -5170,7 +5161,14 @@ static int ufshcd_probe_hba(struct ufs_h
if (ret)
goto out;

- ufs_advertise_fixup_device(hba);
+ ret = ufs_get_device_desc(hba, &card);
+ if (ret) {
+ dev_err(hba->dev, "%s: Failed getting device info. err = %d\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ufs_fixup_device_setup(hba, &card);
ufshcd_tune_unipro_params(hba);

ret = ufshcd_set_vccq_rail_unused(hba,