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linux
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
41/* libata-core.c */
42enum {
43 /* flags for ata_dev_read_id() */
44 ATA_READID_POSTRESET = (1 << 0), /* reading ID after reset */
45
46 /* selector for ata_down_xfermask_limit() */
47 ATA_DNXFER_PIO = 0, /* speed down PIO */
48 ATA_DNXFER_DMA = 1, /* speed down DMA */
49 ATA_DNXFER_40C = 2, /* apply 40c cable limit */
50 ATA_DNXFER_FORCE_PIO = 3, /* force PIO */
51 ATA_DNXFER_FORCE_PIO0 = 4, /* force PIO0 */
52
53 ATA_DNXFER_QUIET = (1 << 31),
54};
55
56extern atomic_t ata_print_id;
57extern int atapi_passthru16;
58extern int libata_fua;
59extern int libata_noacpi;
60extern int libata_allow_tpm;
61extern struct device_type ata_port_type;
62extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
63extern void ata_force_cbl(struct ata_port *ap);
64extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
65extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
66extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
67extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
68 u64 block, u32 n_block, unsigned int tf_flags,
69 unsigned int tag);
70extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
71extern unsigned ata_exec_internal(struct ata_device *dev,
72 struct ata_taskfile *tf, const u8 *cdb,
73 int dma_dir, void *buf, unsigned int buflen,
74 unsigned long timeout);
75extern unsigned ata_exec_internal_sg(struct ata_device *dev,
76 struct ata_taskfile *tf, const u8 *cdb,
77 int dma_dir, struct scatterlist *sg,
78 unsigned int n_elem, unsigned long timeout);
79extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
80extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
81 int (*check_ready)(struct ata_link *link));
82extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
83 unsigned int flags, u16 *id);
84extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
85extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
86 unsigned int readid_flags);
87extern int ata_dev_configure(struct ata_device *dev);
88extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
89extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
90extern unsigned int ata_dev_set_feature(struct ata_device *dev,
91 u8 enable, u8 feature);
92extern void ata_sg_clean(struct ata_queued_cmd *qc);
93extern void ata_qc_free(struct ata_queued_cmd *qc);
94extern void ata_qc_issue(struct ata_queued_cmd *qc);
95extern void __ata_qc_complete(struct ata_queued_cmd *qc);
96extern int atapi_check_dma(struct ata_queued_cmd *qc);
97extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
98extern bool ata_phys_link_online(struct ata_link *link);
99extern bool ata_phys_link_offline(struct ata_link *link);
100extern void ata_dev_init(struct ata_device *dev);
101extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
102extern int sata_link_init_spd(struct ata_link *link);
103extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
104extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
105extern struct ata_port *ata_port_alloc(struct ata_host *host);
106extern const char *sata_spd_string(unsigned int spd);
107extern int ata_port_probe(struct ata_port *ap);
108extern void __ata_port_probe(struct ata_port *ap);
109
110#define to_ata_port(d) container_of(d, struct ata_port, tdev)
111
112/* libata-acpi.c */
113#ifdef CONFIG_ATA_ACPI
114extern unsigned int ata_acpi_gtf_filter;
115extern void ata_acpi_dissociate(struct ata_host *host);
116extern int ata_acpi_on_suspend(struct ata_port *ap);
117extern void ata_acpi_on_resume(struct ata_port *ap);
118extern int ata_acpi_on_devcfg(struct ata_device *dev);
119extern void ata_acpi_on_disable(struct ata_device *dev);
120extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
121extern int ata_acpi_register(void);
122extern void ata_acpi_unregister(void);
123extern void ata_acpi_bind(struct ata_device *dev);
124extern void ata_acpi_unbind(struct ata_device *dev);
125#else
126static inline void ata_acpi_dissociate(struct ata_host *host) { }
127static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
128static inline void ata_acpi_on_resume(struct ata_port *ap) { }
129static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
130static inline void ata_acpi_on_disable(struct ata_device *dev) { }
131static inline void ata_acpi_set_state(struct ata_port *ap,
132 pm_message_t state) { }
133static inline int ata_acpi_register(void) { return 0; }
134static inline void ata_acpi_unregister(void) { }
135static inline void ata_acpi_bind(struct ata_device *dev) { }
136static inline void ata_acpi_unbind(struct ata_device *dev) { }
137#endif
138
139/* libata-scsi.c */
140extern int ata_scsi_add_hosts(struct ata_host *host,
141 struct scsi_host_template *sht);
142extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
143extern int ata_scsi_offline_dev(struct ata_device *dev);
144extern void ata_scsi_media_change_notify(struct ata_device *dev);
145extern void ata_scsi_hotplug(struct work_struct *work);
146extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
147extern void ata_scsi_dev_rescan(struct work_struct *work);
148extern int ata_bus_probe(struct ata_port *ap);
149extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
150 unsigned int id, unsigned int lun);
151
152
153/* libata-eh.c */
154extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
155extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
156extern void ata_eh_acquire(struct ata_port *ap);
157extern void ata_eh_release(struct ata_port *ap);
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_eh_fastdrain_timerfn(unsigned long arg);
161extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
162extern void ata_dev_disable(struct ata_device *dev);
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 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
169 u8 page, void *buf, unsigned int sectors);
170extern void ata_eh_autopsy(struct ata_port *ap);
171const char *ata_get_cmd_descript(u8 command);
172extern void ata_eh_report(struct ata_port *ap);
173extern int ata_eh_reset(struct ata_link *link, int classify,
174 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
175 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
176extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
177extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
178 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
179 ata_postreset_fn_t postreset,
180 struct ata_link **r_failed_disk);
181extern void ata_eh_finish(struct ata_port *ap);
182extern int ata_ering_map(struct ata_ering *ering,
183 int (*map_fn)(struct ata_ering_entry *, void *),
184 void *arg);
185extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key);
186extern unsigned int atapi_eh_request_sense(struct ata_device *dev,
187 u8 *sense_buf, u8 dfl_sense_key);
188
189/* libata-pmp.c */
190#ifdef CONFIG_SATA_PMP
191extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
192extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
193extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
194 unsigned hints);
195extern int sata_pmp_attach(struct ata_device *dev);
196#else /* CONFIG_SATA_PMP */
197static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
198{
199 return -EINVAL;
200}
201
202static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
203{
204 return -EINVAL;
205}
206
207static inline int sata_pmp_set_lpm(struct ata_link *link,
208 enum ata_lpm_policy policy, unsigned hints)
209{
210 return -EINVAL;
211}
212
213static inline int sata_pmp_attach(struct ata_device *dev)
214{
215 return -EINVAL;
216}
217#endif /* CONFIG_SATA_PMP */
218
219/* libata-sff.c */
220#ifdef CONFIG_ATA_SFF
221extern void ata_sff_flush_pio_task(struct ata_port *ap);
222extern void ata_sff_port_init(struct ata_port *ap);
223extern int ata_sff_init(void);
224extern void ata_sff_exit(void);
225#else /* CONFIG_ATA_SFF */
226static inline void ata_sff_flush_pio_task(struct ata_port *ap)
227{ }
228static inline void ata_sff_port_init(struct ata_port *ap)
229{ }
230static inline int ata_sff_init(void)
231{ return 0; }
232static inline void ata_sff_exit(void)
233{ }
234#endif /* CONFIG_ATA_SFF */
235
236/* libata-zpodd.c */
237#ifdef CONFIG_SATA_ZPODD
238void zpodd_init(struct ata_device *dev);
239void zpodd_exit(struct ata_device *dev);
240static inline bool zpodd_dev_enabled(struct ata_device *dev)
241{
242 return dev->zpodd != NULL;
243}
244void zpodd_on_suspend(struct ata_device *dev);
245bool zpodd_zpready(struct ata_device *dev);
246void zpodd_enable_run_wake(struct ata_device *dev);
247void zpodd_disable_run_wake(struct ata_device *dev);
248void zpodd_post_poweron(struct ata_device *dev);
249#else /* CONFIG_SATA_ZPODD */
250static inline void zpodd_init(struct ata_device *dev) {}
251static inline void zpodd_exit(struct ata_device *dev) {}
252static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; }
253static inline void zpodd_on_suspend(struct ata_device *dev) {}
254static inline bool zpodd_zpready(struct ata_device *dev) { return false; }
255static inline void zpodd_enable_run_wake(struct ata_device *dev) {}
256static inline void zpodd_disable_run_wake(struct ata_device *dev) {}
257static inline void zpodd_post_poweron(struct ata_device *dev) {}
258#endif /* CONFIG_SATA_ZPODD */
259
260#endif /* __LIBATA_H__ */