forked from Minki/linux
bd528d4e69
When configfs is in place, the luns will not be represented in sysfs, so there will be no struct device associated with a lun. In order to maintain compatibility and allow configfs adoption sysfs is made optional in this patch. As a consequence some debug macros need to be adjusted. Two new fields are added to struct fsg_lun: name and name_pfx. The "name" is for storing a string which is presented to the user instead of the dev_name. The "name_pfx", if non-NULL, is prepended to the "name" at printing time. The name_pfx is for a future lun.0, which will be a default group in mass_storage.<name>. By design at USB function configfs group's creation time its name is not known (but instead set a bit later in drivers/usb/gadget/configfs.c:function_make) and it is this name that serves the purpose of the said name prefix. So instead of copying a yet-unknown string a pointer to it is stored in struct fsg_lun. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
223 lines
6.1 KiB
C
223 lines
6.1 KiB
C
#ifndef USB_STORAGE_COMMON_H
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#define USB_STORAGE_COMMON_H
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#include <linux/device.h>
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#include <linux/usb/storage.h>
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#include <scsi/scsi.h>
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#include <asm/unaligned.h>
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#ifndef DEBUG
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#undef VERBOSE_DEBUG
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#undef DUMP_MSGS
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#endif /* !DEBUG */
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#ifdef VERBOSE_DEBUG
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#define VLDBG LDBG
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#else
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#define VLDBG(lun, fmt, args...) do { } while (0)
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#endif /* VERBOSE_DEBUG */
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#define _LMSG(func, lun, fmt, args...) \
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do { \
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if ((lun)->name_pfx && *(lun)->name_pfx) \
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func("%s/%s: " fmt, *(lun)->name_pfx, \
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(lun)->name, ## args); \
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else \
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func("%s: " fmt, (lun)->name, ## args); \
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} while (0)
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#define LDBG(lun, fmt, args...) _LMSG(pr_debug, lun, fmt, ## args)
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#define LERROR(lun, fmt, args...) _LMSG(pr_err, lun, fmt, ## args)
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#define LWARN(lun, fmt, args...) _LMSG(pr_warn, lun, fmt, ## args)
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#define LINFO(lun, fmt, args...) _LMSG(pr_info, lun, fmt, ## args)
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#ifdef DUMP_MSGS
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# define dump_msg(fsg, /* const char * */ label, \
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/* const u8 * */ buf, /* unsigned */ length) \
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do { \
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if (length < 512) { \
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DBG(fsg, "%s, length %u:\n", label, length); \
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print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
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16, 1, buf, length, 0); \
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} \
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} while (0)
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# define dump_cdb(fsg) do { } while (0)
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#else
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# define dump_msg(fsg, /* const char * */ label, \
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/* const u8 * */ buf, /* unsigned */ length) do { } while (0)
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# ifdef VERBOSE_DEBUG
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# define dump_cdb(fsg) \
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print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
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16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
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# else
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# define dump_cdb(fsg) do { } while (0)
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# endif /* VERBOSE_DEBUG */
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#endif /* DUMP_MSGS */
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/* Length of a SCSI Command Data Block */
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#define MAX_COMMAND_SIZE 16
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/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
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#define SS_NO_SENSE 0
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#define SS_COMMUNICATION_FAILURE 0x040800
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#define SS_INVALID_COMMAND 0x052000
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#define SS_INVALID_FIELD_IN_CDB 0x052400
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#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
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#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
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#define SS_MEDIUM_NOT_PRESENT 0x023a00
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#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
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#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
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#define SS_RESET_OCCURRED 0x062900
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#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
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#define SS_UNRECOVERED_READ_ERROR 0x031100
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#define SS_WRITE_ERROR 0x030c02
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#define SS_WRITE_PROTECTED 0x072700
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#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
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#define ASC(x) ((u8) ((x) >> 8))
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#define ASCQ(x) ((u8) (x))
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struct fsg_lun {
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struct file *filp;
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loff_t file_length;
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loff_t num_sectors;
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unsigned int initially_ro:1;
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unsigned int ro:1;
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unsigned int removable:1;
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unsigned int cdrom:1;
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unsigned int prevent_medium_removal:1;
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unsigned int registered:1;
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unsigned int info_valid:1;
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unsigned int nofua:1;
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u32 sense_data;
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u32 sense_data_info;
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u32 unit_attention_data;
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unsigned int blkbits; /* Bits of logical block size
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of bound block device */
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unsigned int blksize; /* logical block size of bound block device */
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struct device dev;
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const char *name; /* "lun.name" */
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const char **name_pfx; /* "function.name" */
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};
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static inline bool fsg_lun_is_open(struct fsg_lun *curlun)
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{
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return curlun->filp != NULL;
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}
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/* Big enough to hold our biggest descriptor */
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#define EP0_BUFSIZE 256
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#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
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/* Default size of buffer length. */
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#define FSG_BUFLEN ((u32)16384)
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/* Maximal number of LUNs supported in mass storage function */
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#define FSG_MAX_LUNS 8
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enum fsg_buffer_state {
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BUF_STATE_EMPTY = 0,
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BUF_STATE_FULL,
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BUF_STATE_BUSY
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};
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struct fsg_buffhd {
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void *buf;
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enum fsg_buffer_state state;
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struct fsg_buffhd *next;
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/*
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* The NetChip 2280 is faster, and handles some protocol faults
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* better, if we don't submit any short bulk-out read requests.
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* So we will record the intended request length here.
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*/
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unsigned int bulk_out_intended_length;
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struct usb_request *inreq;
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int inreq_busy;
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struct usb_request *outreq;
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int outreq_busy;
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};
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enum fsg_state {
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/* This one isn't used anywhere */
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FSG_STATE_COMMAND_PHASE = -10,
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FSG_STATE_DATA_PHASE,
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FSG_STATE_STATUS_PHASE,
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FSG_STATE_IDLE = 0,
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FSG_STATE_ABORT_BULK_OUT,
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FSG_STATE_RESET,
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FSG_STATE_INTERFACE_CHANGE,
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FSG_STATE_CONFIG_CHANGE,
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FSG_STATE_DISCONNECT,
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FSG_STATE_EXIT,
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FSG_STATE_TERMINATED
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};
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enum data_direction {
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DATA_DIR_UNKNOWN = 0,
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DATA_DIR_FROM_HOST,
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DATA_DIR_TO_HOST,
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DATA_DIR_NONE
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};
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static inline u32 get_unaligned_be24(u8 *buf)
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{
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return 0xffffff & (u32) get_unaligned_be32(buf - 1);
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}
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enum {
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FSG_STRING_INTERFACE
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};
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extern struct usb_interface_descriptor fsg_intf_desc;
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extern struct usb_endpoint_descriptor fsg_fs_bulk_in_desc;
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extern struct usb_endpoint_descriptor fsg_fs_bulk_out_desc;
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extern struct usb_descriptor_header *fsg_fs_function[];
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extern struct usb_endpoint_descriptor fsg_hs_bulk_in_desc;
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extern struct usb_endpoint_descriptor fsg_hs_bulk_out_desc;
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extern struct usb_descriptor_header *fsg_hs_function[];
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extern struct usb_endpoint_descriptor fsg_ss_bulk_in_desc;
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extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc;
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extern struct usb_endpoint_descriptor fsg_ss_bulk_out_desc;
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extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc;
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extern struct usb_descriptor_header *fsg_ss_function[];
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void fsg_lun_close(struct fsg_lun *curlun);
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int fsg_lun_open(struct fsg_lun *curlun, const char *filename);
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int fsg_lun_fsync_sub(struct fsg_lun *curlun);
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void store_cdrom_address(u8 *dest, int msf, u32 addr);
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ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t fsg_show_file(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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ssize_t fsg_store_nofua(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count);
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ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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#endif /* USB_STORAGE_COMMON_H */
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