drivers/scsi/scsi_common.c

1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/unaligned.h>
29 	"Direct-Access    ",
30 	"Sequential-Access",
34 	"CD-ROM           ",
43 	"Direct-Access-RBC",
49 	"Direct-Access-ZBC",
53  * scsi_device_type - Return 17-char string indicating device type.
59 		return "Well-known LUN   ";  in scsi_device_type()
61 		return "No Device        ";  in scsi_device_type()
111  * scsilun_to_int - convert a scsi_lun to an int
115  *     Convert @scsilun from a struct scsi_lun to a four-byte host byte-ordered
120  *     For a description of the LUN format, post SCSI-3 see the SCSI
121  *     Architecture Model, for SCSI-3 see the SCSI Controller Commands.
137 		lun = lun | (((u64)scsilun->scsi_lun[i] << ((i + 1) * 8)) |  in scsilun_to_int()
138 			     ((u64)scsilun->scsi_lun[i + 1] << (i * 8)));  in scsilun_to_int()
144  * int_to_scsilun - reverts an int into a scsi_lun
150  *     an 8-byte lun value into an int. This routine unpacks the int
162 	memset(scsilun->scsi_lun, 0, sizeof(scsilun->scsi_lun));  in int_to_scsilun()
165 		scsilun->scsi_lun[i] = (lun >> 8) & 0xFF;  in int_to_scsilun()
166 		scsilun->scsi_lun[i+1] = lun & 0xFF;  in int_to_scsilun()
173  * scsi_normalize_sense - normalize main elements from either fixed or
199 	sshdr->response_code = (sense_buffer[0] & 0x7f);  in scsi_normalize_sense()
204 	if (sshdr->response_code >= 0x72) {  in scsi_normalize_sense()
209 			sshdr->sense_key = (sense_buffer[1] & 0xf);  in scsi_normalize_sense()
211 			sshdr->asc = sense_buffer[2];  in scsi_normalize_sense()
213 			sshdr->ascq = sense_buffer[3];  in scsi_normalize_sense()
215 			sshdr->additional_length = sense_buffer[7];  in scsi_normalize_sense()
221 			sshdr->sense_key = (sense_buffer[2] & 0xf);  in scsi_normalize_sense()
225 				sshdr->asc = sense_buffer[12];  in scsi_normalize_sense()
227 				sshdr->ascq = sense_buffer[13];  in scsi_normalize_sense()
236  * scsi_sense_desc_find - search for a given descriptor type in	descriptor sense data format.
240  *			(e.g. 0 -> information)
258 	add_sen_len = (add_sen_len < (sb_len - 8)) ?  in scsi_sense_desc_find()
259 			add_sen_len : (sb_len - 8);  in scsi_sense_desc_find()
263 		add_len = (k < (add_sen_len - 1)) ? descp[1]: -1;  in scsi_sense_desc_find()
275  * scsi_build_sense_buffer - build sense data in a buffer
276  * @desc:	Sense format (non-zero == descriptor format,
303  * scsi_set_sense_information - set the information field in a
307  * @info:	64-bit information value to be set
310  *	0 on success or -EINVAL for invalid sense buffer length
326 			return -EINVAL;  in scsi_set_sense_information()
351  * scsi_set_sense_field_pointer - set the field pointer sense key
360  *	0 on success or -EINVAL for invalid sense buffer length
376 			return -EINVAL;  in scsi_set_sense_field_pointer()