From: Bean Huo <[email protected]>
v4--v5:
1. Rebase the patch
2. Change commit message of patch 1/3
v3--v4:
1. Change patch 1/3 title
2. Fix one typo in patch 3/3
3. Fix coding type issue in patch 2/3 based on Bart's comment
v2--v3:
1. Add patch 3/3
2. Add remove unused parameter param_offset in patch 1/3 based on Daejun's comment
3. Further optimized patch 2/3 based on Bart's comment
v1--v2:
1. change in ufshcd_lu_init() in patch 2/2:
1) Remove duplicate parameter initialization
2) Move lun parameter initialization before kmalloc()
Bean Huo (3):
scsi: ufs: core: Revert "WB is only available on LUN #0 to #7"
scsi: ufs: core: Cleanup ufshcd_slave_alloc()
scsi: ufs: core: Use is_visible to control UFS unit descriptor sysfs
nodes
drivers/ufs/core/ufs-sysfs.c | 21 ++++-
drivers/ufs/core/ufshcd-priv.h | 6 +-
drivers/ufs/core/ufshcd.c | 152 ++++++++++++---------------------
3 files changed, 74 insertions(+), 105 deletions(-)
--
2.34.1
From: Bean Huo <[email protected]>
UFS Boot and Device W-LUs do not have unit descriptors, and RPMB does not
support WB, we can use is_visible() to control which nodes are visible
and which are not.
Signed-off-by: Bean Huo <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Arthur Simchaev <[email protected]>
---
drivers/ufs/core/ufs-sysfs.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index eb6b278c4e79..883f0e44b54e 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -1285,9 +1285,27 @@ static struct attribute *ufs_sysfs_unit_descriptor[] = {
NULL,
};
+static umode_t ufs_unit_descriptor_is_visible(struct kobject *kobj, struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct scsi_device *sdev = to_scsi_device(dev);
+ u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
+ umode_t mode = attr->mode;
+
+ if (lun == UFS_UPIU_BOOT_WLUN || lun == UFS_UPIU_UFS_DEVICE_WLUN)
+ /* Boot and device WLUN have no unit descriptors */
+ mode = 0;
+ if (lun == UFS_UPIU_RPMB_WLUN && attr == &dev_attr_wb_buf_alloc_units.attr)
+ mode = 0;
+
+ return mode;
+}
+
+
const struct attribute_group ufs_sysfs_unit_descriptor_group = {
.name = "unit_descriptor",
.attrs = ufs_sysfs_unit_descriptor,
+ .is_visible = ufs_unit_descriptor_is_visible,
};
static ssize_t dyn_cap_needed_attribute_show(struct device *dev,
--
2.34.1
From: Bean Huo <[email protected]>
Combine ufshcd_get_lu_power_on_wp_status() and ufshcd_set_queue_depth()
into one single ufshcd_lu_init(), so that we only need to read the LUN
descriptor once.
Signed-off-by: Bean Huo <[email protected]>
Reviewed-by: Arthur Simchaev <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
---
drivers/ufs/core/ufshcd.c | 150 ++++++++++++++------------------------
1 file changed, 53 insertions(+), 97 deletions(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index e8b8b213c420..cd55853c0127 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4858,100 +4858,6 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba)
return err;
}
-/**
- * ufshcd_set_queue_depth - set lun queue depth
- * @sdev: pointer to SCSI device
- *
- * Read bLUQueueDepth value and activate scsi tagged command
- * queueing. For WLUN, queue depth is set to 1. For best-effort
- * cases (bLUQueueDepth = 0) the queue depth is set to a maximum
- * value that host can queue.
- */
-static void ufshcd_set_queue_depth(struct scsi_device *sdev)
-{
- int ret = 0;
- u8 lun_qdepth;
- struct ufs_hba *hba;
-
- hba = shost_priv(sdev->host);
-
- lun_qdepth = hba->nutrs;
- ret = ufshcd_read_unit_desc_param(hba,
- ufshcd_scsi_to_upiu_lun(sdev->lun),
- UNIT_DESC_PARAM_LU_Q_DEPTH,
- &lun_qdepth,
- sizeof(lun_qdepth));
-
- /* Some WLUN doesn't support unit descriptor */
- if (ret == -EOPNOTSUPP)
- lun_qdepth = 1;
- else if (!lun_qdepth)
- /* eventually, we can figure out the real queue depth */
- lun_qdepth = hba->nutrs;
- else
- lun_qdepth = min_t(int, lun_qdepth, hba->nutrs);
-
- dev_dbg(hba->dev, "%s: activate tcq with queue depth %d\n",
- __func__, lun_qdepth);
- scsi_change_queue_depth(sdev, lun_qdepth);
-}
-
-/*
- * ufshcd_get_lu_wp - returns the "b_lu_write_protect" from UNIT DESCRIPTOR
- * @hba: per-adapter instance
- * @lun: UFS device lun id
- * @b_lu_write_protect: pointer to buffer to hold the LU's write protect info
- *
- * Returns 0 in case of success and b_lu_write_protect status would be returned
- * @b_lu_write_protect parameter.
- * Returns -ENOTSUPP if reading b_lu_write_protect is not supported.
- * Returns -EINVAL in case of invalid parameters passed to this function.
- */
-static int ufshcd_get_lu_wp(struct ufs_hba *hba,
- u8 lun,
- u8 *b_lu_write_protect)
-{
- int ret;
-
- if (!b_lu_write_protect)
- ret = -EINVAL;
- /*
- * According to UFS device spec, RPMB LU can't be write
- * protected so skip reading bLUWriteProtect parameter for
- * it. For other W-LUs, UNIT DESCRIPTOR is not available.
- */
- else if (lun >= hba->dev_info.max_lu_supported)
- ret = -ENOTSUPP;
- else
- ret = ufshcd_read_unit_desc_param(hba,
- lun,
- UNIT_DESC_PARAM_LU_WR_PROTECT,
- b_lu_write_protect,
- sizeof(*b_lu_write_protect));
- return ret;
-}
-
-/**
- * ufshcd_get_lu_power_on_wp_status - get LU's power on write protect
- * status
- * @hba: per-adapter instance
- * @sdev: pointer to SCSI device
- *
- */
-static inline void ufshcd_get_lu_power_on_wp_status(struct ufs_hba *hba,
- const struct scsi_device *sdev)
-{
- if (hba->dev_info.f_power_on_wp_en &&
- !hba->dev_info.is_lu_power_on_wp) {
- u8 b_lu_write_protect;
-
- if (!ufshcd_get_lu_wp(hba, ufshcd_scsi_to_upiu_lun(sdev->lun),
- &b_lu_write_protect) &&
- (b_lu_write_protect == UFS_LU_POWER_ON_WP))
- hba->dev_info.is_lu_power_on_wp = true;
- }
-}
-
/**
* ufshcd_setup_links - associate link b/w device wlun and other luns
* @sdev: pointer to SCSI device
@@ -4989,6 +4895,58 @@ static void ufshcd_setup_links(struct ufs_hba *hba, struct scsi_device *sdev)
}
}
+/**
+ * ufshcd_lu_init - Initialize the relevant parameters of the LU
+ * @hba: per-adapter instance
+ * @sdev: pointer to SCSI device
+ */
+static void ufshcd_lu_init(struct ufs_hba *hba, struct scsi_device *sdev)
+{
+ int len = hba->desc_size[QUERY_DESC_IDN_UNIT];
+ u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
+ u8 lun_qdepth = hba->nutrs;
+ u8 *desc_buf;
+ int ret;
+
+ desc_buf = kzalloc(len, GFP_KERNEL);
+ if (!desc_buf)
+ goto set_qdepth;
+
+ ret = ufshcd_read_unit_desc_param(hba, lun, 0, desc_buf, len);
+ if (ret < 0) {
+ if (ret == -EOPNOTSUPP)
+ /* If LU doesn't support unit descriptor, its queue depth is set to 1 */
+ lun_qdepth = 1;
+ kfree(desc_buf);
+ goto set_qdepth;
+ }
+
+ if (desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH]) {
+ /*
+ * In per-LU queueing architecture, bLUQueueDepth will not be 0, then we will
+ * use the smaller between UFSHCI CAP.NUTRS and UFS LU bLUQueueDepth
+ */
+ lun_qdepth = min_t(int, desc_buf[UNIT_DESC_PARAM_LU_Q_DEPTH], hba->nutrs);
+ }
+ /*
+ * According to UFS device specification, the write protection mode is only supported by
+ * normal LU, not supported by WLUN.
+ */
+ if (hba->dev_info.f_power_on_wp_en && lun < hba->dev_info.max_lu_supported &&
+ !hba->dev_info.is_lu_power_on_wp &&
+ desc_buf[UNIT_DESC_PARAM_LU_WR_PROTECT] == UFS_LU_POWER_ON_WP)
+ hba->dev_info.is_lu_power_on_wp = true;
+
+ kfree(desc_buf);
+set_qdepth:
+ /*
+ * For WLUNs that don't support unit descriptor, queue depth is set to 1. For LUs whose
+ * bLUQueueDepth == 0, the queue depth is set to a maximum value that host can queue.
+ */
+ dev_dbg(hba->dev, "Set LU %x queue depth %d\n", lun, lun_qdepth);
+ scsi_change_queue_depth(sdev, lun_qdepth);
+}
+
/**
* ufshcd_slave_alloc - handle initial SCSI device configurations
* @sdev: pointer to SCSI device
@@ -5016,9 +4974,7 @@ static int ufshcd_slave_alloc(struct scsi_device *sdev)
/* WRITE_SAME command is not supported */
sdev->no_write_same = 1;
- ufshcd_set_queue_depth(sdev);
-
- ufshcd_get_lu_power_on_wp_status(hba, sdev);
+ ufshcd_lu_init(hba, sdev);
ufshcd_setup_links(hba, sdev);
--
2.34.1
Bean,
> Bean Huo (3):
> scsi: ufs: core: Revert "WB is only available on LUN #0 to #7"
> scsi: ufs: core: Cleanup ufshcd_slave_alloc()
> scsi: ufs: core: Use is_visible to control UFS unit descriptor sysfs
> nodes
Applied to 6.2/scsi-staging, thanks!
--
Martin K. Petersen Oracle Linux Engineering
On Wed, 26 Oct 2022 00:24:27 +0200, Bean Huo wrote:
> From: Bean Huo <[email protected]>
>
> v4--v5:
> 1. Rebase the patch
> 2. Change commit message of patch 1/3
>
> v3--v4:
> 1. Change patch 1/3 title
> 2. Fix one typo in patch 3/3
> 3. Fix coding type issue in patch 2/3 based on Bart's comment
>
> [...]
Applied to 6.2/scsi-queue, thanks!
[1/3] scsi: ufs: core: Revert "WB is only available on LUN #0 to #7"
https://git.kernel.org/mkp/scsi/c/b43678ea5bbd
[2/3] scsi: ufs: core: Cleanup ufshcd_slave_alloc()
https://git.kernel.org/mkp/scsi/c/dca899bc0223
[3/3] scsi: ufs: core: Use is_visible to control UFS unit descriptor sysfs nodes
https://git.kernel.org/mkp/scsi/c/9d266e792b0f
--
Martin K. Petersen Oracle Linux Engineering