80289167fd
The following patch enhances libata to allow SAS device drivers to utilize libata to talk to SATA devices. It introduces some new APIs which allow libata to be used without allocating a virtual scsi host. New APIs: ata_sas_port_alloc - Allocate an ata_port ata_sas_port_init - Initialize an ata_port (probe device, etc) ata_sas_port_destroy - Free an ata_port allocated by ata_sas_port_alloc ata_sas_slave_configure - configure scsi device ata_sas_queuecmd - queue a scsi command, similar to ata_scsi_queuecomand These new APIs can be used either directly by a SAS LLDD or could be used by the SAS transport class. Possible usage for a SAS LLDD would be: scsi_scan_host target_alloc ata_sas_port_alloc slave_alloc ata_sas_port_init slave_configure ata_sas_slave_configure Commands received by the LLDD for SATA devices would call ata_sas_queuecmd. Device teardown would occur with: slave_destroy port_disable target_destroy ata_sas_port_destroy Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
123 lines
5.1 KiB
C
123 lines
5.1 KiB
C
/*
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* libata.h - helper library for ATA
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*
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2004 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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*/
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#ifndef __LIBATA_H__
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#define __LIBATA_H__
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#define DRV_NAME "libata"
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#define DRV_VERSION "2.00" /* must be exactly four chars */
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struct ata_scsi_args {
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struct ata_device *dev;
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u16 *id;
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struct scsi_cmnd *cmd;
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void (*done)(struct scsi_cmnd *);
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};
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/* libata-core.c */
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extern struct workqueue_struct *ata_aux_wq;
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extern int atapi_enabled;
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extern int atapi_dmadir;
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extern int libata_fua;
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extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
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extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc);
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extern void ata_dev_disable(struct ata_device *dev);
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extern void ata_port_flush_task(struct ata_port *ap);
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extern unsigned ata_exec_internal(struct ata_device *dev,
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struct ata_taskfile *tf, const u8 *cdb,
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int dma_dir, void *buf, unsigned int buflen);
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extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
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extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
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int post_reset, u16 *id);
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extern int ata_dev_configure(struct ata_device *dev, int print_info);
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extern int sata_down_spd_limit(struct ata_port *ap);
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extern int sata_set_spd_needed(struct ata_port *ap);
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extern int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0);
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extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
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extern void ata_qc_free(struct ata_queued_cmd *qc);
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extern void ata_qc_issue(struct ata_queued_cmd *qc);
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extern void __ata_qc_complete(struct ata_queued_cmd *qc);
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extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
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extern void ata_dev_select(struct ata_port *ap, unsigned int device,
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unsigned int wait, unsigned int can_sleep);
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extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
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extern int ata_flush_cache(struct ata_device *dev);
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extern void ata_dev_init(struct ata_device *dev);
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extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
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extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
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extern void ata_port_init(struct ata_port *ap, struct ata_host_set *host_set,
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const struct ata_probe_ent *ent, unsigned int port_no);
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extern struct ata_probe_ent *ata_probe_ent_alloc(struct device *dev,
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const struct ata_port_info *port);
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/* libata-scsi.c */
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extern struct scsi_transport_template ata_scsi_transport_template;
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extern void ata_scsi_scan_host(struct ata_port *ap);
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extern int ata_scsi_offline_dev(struct ata_device *dev);
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extern void ata_scsi_hotplug(void *data);
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extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_sync_cache(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
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unsigned int buflen);
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extern void ata_scsi_badcmd(struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *),
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u8 asc, u8 ascq);
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extern void ata_scsi_set_sense(struct scsi_cmnd *cmd,
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u8 sk, u8 asc, u8 ascq);
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extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
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unsigned int (*actor) (struct ata_scsi_args *args,
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u8 *rbuf, unsigned int buflen));
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extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
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extern void ata_scsi_dev_rescan(void *data);
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extern int ata_bus_probe(struct ata_port *ap);
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/* libata-eh.c */
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extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
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extern void ata_scsi_error(struct Scsi_Host *host);
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extern void ata_port_wait_eh(struct ata_port *ap);
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extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
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#endif /* __LIBATA_H__ */
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