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libata: fix EH device failure handling
[deliverable/linux.git] / drivers / ata / libata.h
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CommitLineData
1/*
2 * libata.h - helper library for ATA
3 *
4 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
5 * Copyright 2003-2004 Jeff Garzik
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, write to
20 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 *
23 * libata documentation is available via 'make {ps|pdf}docs',
24 * as Documentation/DocBook/libata.*
25 *
26 */
27
28#ifndef __LIBATA_H__
29#define __LIBATA_H__
30
31#define DRV_NAME "libata"
32#define DRV_VERSION "3.00" /* must be exactly four chars */
33
34struct ata_scsi_args {
35 struct ata_device *dev;
36 u16 *id;
37 struct scsi_cmnd *cmd;
38 void (*done)(struct scsi_cmnd *);
39};
40
41static inline int ata_is_builtin_hardreset(ata_reset_fn_t reset)
42{
43 if (reset == sata_std_hardreset)
44 return 1;
45#ifdef CONFIG_ATA_SFF
46 if (reset == sata_sff_hardreset)
47 return 1;
48#endif
49 return 0;
50}
51
52/* libata-core.c */
53enum {
54 /* flags for ata_dev_read_id() */
55 ATA_READID_POSTRESET = (1 << 0), /* reading ID after reset */
56
57 /* selector for ata_down_xfermask_limit() */
58 ATA_DNXFER_PIO = 0, /* speed down PIO */
59 ATA_DNXFER_DMA = 1, /* speed down DMA */
60 ATA_DNXFER_40C = 2, /* apply 40c cable limit */
61 ATA_DNXFER_FORCE_PIO = 3, /* force PIO */
62 ATA_DNXFER_FORCE_PIO0 = 4, /* force PIO0 */
63
64 ATA_DNXFER_QUIET = (1 << 31),
65};
66
67extern unsigned int ata_print_id;
68extern struct workqueue_struct *ata_aux_wq;
69extern int atapi_passthru16;
70extern int libata_fua;
71extern int libata_noacpi;
72extern int libata_allow_tpm;
73extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
74extern void ata_force_cbl(struct ata_port *ap);
75extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
76extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
77extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
78extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
79 u64 block, u32 n_block, unsigned int tf_flags,
80 unsigned int tag);
81extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
82extern void ata_dev_disable(struct ata_device *dev);
83extern void ata_pio_queue_task(struct ata_port *ap, void *data,
84 unsigned long delay);
85extern void ata_port_flush_task(struct ata_port *ap);
86extern unsigned ata_exec_internal(struct ata_device *dev,
87 struct ata_taskfile *tf, const u8 *cdb,
88 int dma_dir, void *buf, unsigned int buflen,
89 unsigned long timeout);
90extern unsigned ata_exec_internal_sg(struct ata_device *dev,
91 struct ata_taskfile *tf, const u8 *cdb,
92 int dma_dir, struct scatterlist *sg,
93 unsigned int n_elem, unsigned long timeout);
94extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
95extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
96 int (*check_ready)(struct ata_link *link));
97extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
98 unsigned int flags, u16 *id);
99extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
100extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
101 unsigned int readid_flags);
102extern int ata_dev_configure(struct ata_device *dev);
103extern int sata_down_spd_limit(struct ata_link *link);
104extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
105extern void ata_sg_clean(struct ata_queued_cmd *qc);
106extern void ata_qc_free(struct ata_queued_cmd *qc);
107extern void ata_qc_issue(struct ata_queued_cmd *qc);
108extern void __ata_qc_complete(struct ata_queued_cmd *qc);
109extern int atapi_check_dma(struct ata_queued_cmd *qc);
110extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
111extern bool ata_phys_link_online(struct ata_link *link);
112extern bool ata_phys_link_offline(struct ata_link *link);
113extern void ata_dev_init(struct ata_device *dev);
114extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
115extern int sata_link_init_spd(struct ata_link *link);
116extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
117extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
118extern struct ata_port *ata_port_alloc(struct ata_host *host);
119extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy);
120extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm);
121
122/* libata-acpi.c */
123#ifdef CONFIG_ATA_ACPI
124extern void ata_acpi_associate_sata_port(struct ata_port *ap);
125extern void ata_acpi_associate(struct ata_host *host);
126extern void ata_acpi_dissociate(struct ata_host *host);
127extern int ata_acpi_on_suspend(struct ata_port *ap);
128extern void ata_acpi_on_resume(struct ata_port *ap);
129extern int ata_acpi_on_devcfg(struct ata_device *dev);
130extern void ata_acpi_on_disable(struct ata_device *dev);
131extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
132#else
133static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
134static inline void ata_acpi_associate(struct ata_host *host) { }
135static inline void ata_acpi_dissociate(struct ata_host *host) { }
136static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
137static inline void ata_acpi_on_resume(struct ata_port *ap) { }
138static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
139static inline void ata_acpi_on_disable(struct ata_device *dev) { }
140static inline void ata_acpi_set_state(struct ata_port *ap,
141 pm_message_t state) { }
142#endif
143
144/* libata-scsi.c */
145extern int ata_scsi_add_hosts(struct ata_host *host,
146 struct scsi_host_template *sht);
147extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
148extern int ata_scsi_offline_dev(struct ata_device *dev);
149extern void ata_scsi_media_change_notify(struct ata_device *dev);
150extern void ata_scsi_hotplug(struct work_struct *work);
151extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
152extern void ata_scsi_dev_rescan(struct work_struct *work);
153extern int ata_bus_probe(struct ata_port *ap);
154
155/* libata-eh.c */
156extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
157extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
158extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
159extern void ata_scsi_error(struct Scsi_Host *host);
160extern void ata_port_wait_eh(struct ata_port *ap);
161extern void ata_eh_fastdrain_timerfn(unsigned long arg);
162extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
163extern void ata_eh_detach_dev(struct ata_device *dev);
164extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
165 unsigned int action);
166extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
167 unsigned int action);
168extern void ata_eh_autopsy(struct ata_port *ap);
169extern void ata_eh_report(struct ata_port *ap);
170extern int ata_eh_reset(struct ata_link *link, int classify,
171 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
172 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
173extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
174extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
175 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
176 ata_postreset_fn_t postreset,
177 struct ata_link **r_failed_disk);
178extern void ata_eh_finish(struct ata_port *ap);
179
180/* libata-pmp.c */
181#ifdef CONFIG_SATA_PMP
182extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
183extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
184extern int sata_pmp_attach(struct ata_device *dev);
185#else /* CONFIG_SATA_PMP */
186static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
187{
188 return -EINVAL;
189}
190
191static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
192{
193 return -EINVAL;
194}
195
196static inline int sata_pmp_attach(struct ata_device *dev)
197{
198 return -EINVAL;
199}
200#endif /* CONFIG_SATA_PMP */
201
202/* libata-sff.c */
203#ifdef CONFIG_ATA_SFF
204extern void ata_dev_select(struct ata_port *ap, unsigned int device,
205 unsigned int wait, unsigned int can_sleep);
206extern u8 ata_irq_on(struct ata_port *ap);
207extern void ata_pio_task(struct work_struct *work);
208#endif /* CONFIG_ATA_SFF */
209
210#endif /* __LIBATA_H__ */
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