scsi: ufs: sysfs: string descriptors
This patch introduces a sysfs group entry for the UFS string descriptors. The group adds "string_descriptors" folder under the UFS driver sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The folder will contain 5 files that will show string values defined by the UFS spec: a manufacturer name, a product name, an OEM id, a serial number and a product revision. The full information about the string descriptors could be found at UFS specifications 2.1. Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanislav Nijnikov
Martin K. Petersen
parent
c2e6e283c5
commit
2238d31cde
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@ -451,3 +451,42 @@ Description: This file shows maximum VCC, VCCQ and VCCQ2 value for
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power descriptor parameters. The full information about
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the descriptor could be found at UFS specifications 2.1.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/manufacturer_name
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a device manufactureer name string.
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The full information about the descriptor could be found at
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UFS specifications 2.1.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a product name string. The full information
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about the descriptor could be found at UFS specifications 2.1.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a OEM ID string. The full information
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about the descriptor could be found at UFS specifications 2.1.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a device serial number string. The full
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information about the descriptor could be found at
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UFS specifications 2.1.
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The file is read only.
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What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
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Date: February 2018
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Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
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Description: This file contains a product revision string. The full
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information about the descriptor could be found at
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UFS specifications 2.1.
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The file is read only.
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@ -484,6 +484,61 @@ static const struct attribute_group ufs_sysfs_power_descriptor_group = {
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.attrs = ufs_sysfs_power_descriptor,
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};
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#define UFS_STRING_DESCRIPTOR(_name, _pname) \
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static ssize_t _name##_show(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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u8 index; \
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struct ufs_hba *hba = dev_get_drvdata(dev); \
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int ret; \
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int desc_len = QUERY_DESC_MAX_SIZE; \
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u8 *desc_buf; \
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desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_ATOMIC); \
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if (!desc_buf) \
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return -ENOMEM; \
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ret = ufshcd_query_descriptor_retry(hba, \
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UPIU_QUERY_OPCODE_READ_DESC, QUERY_DESC_IDN_DEVICE, \
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0, 0, desc_buf, &desc_len); \
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if (ret) { \
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ret = -EINVAL; \
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goto out; \
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} \
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index = desc_buf[DEVICE_DESC_PARAM##_pname]; \
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memset(desc_buf, 0, QUERY_DESC_MAX_SIZE); \
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if (ufshcd_read_string_desc(hba, index, desc_buf, \
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QUERY_DESC_MAX_SIZE, true)) { \
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ret = -EINVAL; \
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goto out; \
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} \
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ret = snprintf(buf, PAGE_SIZE, "%s\n", \
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desc_buf + QUERY_DESC_HDR_SIZE); \
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out: \
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kfree(desc_buf); \
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return ret; \
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} \
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static DEVICE_ATTR_RO(_name)
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UFS_STRING_DESCRIPTOR(manufacturer_name, _MANF_NAME);
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UFS_STRING_DESCRIPTOR(product_name, _PRDCT_NAME);
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UFS_STRING_DESCRIPTOR(oem_id, _OEM_ID);
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UFS_STRING_DESCRIPTOR(serial_number, _SN);
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UFS_STRING_DESCRIPTOR(product_revision, _PRDCT_REV);
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static struct attribute *ufs_sysfs_string_descriptors[] = {
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&dev_attr_manufacturer_name.attr,
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&dev_attr_product_name.attr,
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&dev_attr_oem_id.attr,
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&dev_attr_serial_number.attr,
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&dev_attr_product_revision.attr,
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NULL,
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};
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static const struct attribute_group ufs_sysfs_string_descriptors_group = {
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.name = "string_descriptors",
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.attrs = ufs_sysfs_string_descriptors,
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};
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static const struct attribute_group *ufs_sysfs_groups[] = {
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&ufs_sysfs_default_group,
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&ufs_sysfs_device_descriptor_group,
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@ -491,6 +546,7 @@ static const struct attribute_group *ufs_sysfs_groups[] = {
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&ufs_sysfs_geometry_descriptor_group,
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&ufs_sysfs_health_descriptor_group,
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&ufs_sysfs_power_descriptor_group,
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&ufs_sysfs_string_descriptors_group,
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NULL,
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};
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@ -2873,11 +2873,11 @@ static int __ufshcd_query_descriptor(struct ufs_hba *hba,
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* The buf_len parameter will contain, on return, the length parameter
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* received on the response.
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*/
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static int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
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enum query_opcode opcode,
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enum desc_idn idn, u8 index,
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u8 selector,
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u8 *desc_buf, int *buf_len)
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int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
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enum query_opcode opcode,
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enum desc_idn idn, u8 index,
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u8 selector,
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u8 *desc_buf, int *buf_len)
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{
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int err;
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int retries;
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@ -3093,8 +3093,8 @@ static int ufshcd_read_device_desc(struct ufs_hba *hba, u8 *buf, u32 size)
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* Return 0 in case of success, non-zero otherwise
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*/
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#define ASCII_STD true
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static int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
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u8 *buf, u32 size, bool ascii)
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int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
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u8 *buf, u32 size, bool ascii)
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{
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int err = 0;
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@ -842,6 +842,12 @@ static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)
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}
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/* Expose Query-Request API */
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int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
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enum query_opcode opcode,
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enum desc_idn idn, u8 index,
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u8 selector,
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u8 *desc_buf, int *buf_len);
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int ufshcd_read_desc_param(struct ufs_hba *hba,
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enum desc_idn desc_id,
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int desc_index,
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@ -850,6 +856,9 @@ int ufshcd_read_desc_param(struct ufs_hba *hba,
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u8 param_size);
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int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
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enum flag_idn idn, bool *flag_res);
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int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
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u8 *buf, u32 size, bool ascii);
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int ufshcd_hold(struct ufs_hba *hba, bool async);
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void ufshcd_release(struct ufs_hba *hba);
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