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Merge branch 'topic/ioatdma' into next
[deliverable/linux.git] / drivers / ata / libata.h
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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, int tag);
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(const struct ata_taskfile *tf,
71 struct ata_device *dev);
72extern unsigned ata_exec_internal(struct ata_device *dev,
73 struct ata_taskfile *tf, const u8 *cdb,
74 int dma_dir, void *buf, unsigned int buflen,
75 unsigned long timeout);
76extern unsigned ata_exec_internal_sg(struct ata_device *dev,
77 struct ata_taskfile *tf, const u8 *cdb,
78 int dma_dir, struct scatterlist *sg,
79 unsigned int n_elem, unsigned long timeout);
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 void ata_acpi_bind_port(struct ata_port *ap);
122extern void ata_acpi_bind_dev(struct ata_device *dev);
123extern acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
124#else
125static inline void ata_acpi_dissociate(struct ata_host *host) { }
126static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
127static inline void ata_acpi_on_resume(struct ata_port *ap) { }
128static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
129static inline void ata_acpi_on_disable(struct ata_device *dev) { }
130static inline void ata_acpi_set_state(struct ata_port *ap,
131 pm_message_t state) { }
132static inline void ata_acpi_bind_port(struct ata_port *ap) {}
133static inline void ata_acpi_bind_dev(struct ata_device *dev) {}
134#endif
135
136/* libata-scsi.c */
137extern int ata_scsi_add_hosts(struct ata_host *host,
138 struct scsi_host_template *sht);
139extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
140extern int ata_scsi_offline_dev(struct ata_device *dev);
141extern void ata_scsi_set_sense(struct ata_device *dev,
142 struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq);
143extern void ata_scsi_set_sense_information(struct ata_device *dev,
144 struct scsi_cmnd *cmd,
145 const struct ata_taskfile *tf);
146extern void ata_scsi_media_change_notify(struct ata_device *dev);
147extern void ata_scsi_hotplug(struct work_struct *work);
148extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
149extern void ata_scsi_dev_rescan(struct work_struct *work);
150extern int ata_bus_probe(struct ata_port *ap);
151extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
152 unsigned int id, u64 lun);
153int ata_sas_allocate_tag(struct ata_port *ap);
154void ata_sas_free_tag(unsigned int tag, struct ata_port *ap);
155
156
157/* libata-eh.c */
158extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
159extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
160extern void ata_eh_acquire(struct ata_port *ap);
161extern void ata_eh_release(struct ata_port *ap);
162extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
163extern void ata_scsi_error(struct Scsi_Host *host);
164extern void ata_eh_fastdrain_timerfn(unsigned long arg);
165extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
166extern void ata_dev_disable(struct ata_device *dev);
167extern void ata_eh_detach_dev(struct ata_device *dev);
168extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
169 unsigned int action);
170extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
171 unsigned int action);
172extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
173 u8 page, void *buf, unsigned int sectors);
174extern void ata_eh_autopsy(struct ata_port *ap);
175const char *ata_get_cmd_descript(u8 command);
176extern void ata_eh_report(struct ata_port *ap);
177extern int ata_eh_reset(struct ata_link *link, int classify,
178 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
179 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
180extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
181extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
182 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
183 ata_postreset_fn_t postreset,
184 struct ata_link **r_failed_disk);
185extern void ata_eh_finish(struct ata_port *ap);
186extern int ata_ering_map(struct ata_ering *ering,
187 int (*map_fn)(struct ata_ering_entry *, void *),
188 void *arg);
189extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key);
190extern unsigned int atapi_eh_request_sense(struct ata_device *dev,
191 u8 *sense_buf, u8 dfl_sense_key);
192
193/* libata-pmp.c */
194#ifdef CONFIG_SATA_PMP
195extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
196extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
197extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
198 unsigned hints);
199extern int sata_pmp_attach(struct ata_device *dev);
200#else /* CONFIG_SATA_PMP */
201static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
202{
203 return -EINVAL;
204}
205
206static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
207{
208 return -EINVAL;
209}
210
211static inline int sata_pmp_set_lpm(struct ata_link *link,
212 enum ata_lpm_policy policy, unsigned hints)
213{
214 return -EINVAL;
215}
216
217static inline int sata_pmp_attach(struct ata_device *dev)
218{
219 return -EINVAL;
220}
221#endif /* CONFIG_SATA_PMP */
222
223/* libata-sff.c */
224#ifdef CONFIG_ATA_SFF
225extern void ata_sff_flush_pio_task(struct ata_port *ap);
226extern void ata_sff_port_init(struct ata_port *ap);
227extern int ata_sff_init(void);
228extern void ata_sff_exit(void);
229#else /* CONFIG_ATA_SFF */
230static inline void ata_sff_flush_pio_task(struct ata_port *ap)
231{ }
232static inline void ata_sff_port_init(struct ata_port *ap)
233{ }
234static inline int ata_sff_init(void)
235{ return 0; }
236static inline void ata_sff_exit(void)
237{ }
238#endif /* CONFIG_ATA_SFF */
239
240/* libata-zpodd.c */
241#ifdef CONFIG_SATA_ZPODD
242void zpodd_init(struct ata_device *dev);
243void zpodd_exit(struct ata_device *dev);
244static inline bool zpodd_dev_enabled(struct ata_device *dev)
245{
246 return dev->zpodd != NULL;
247}
248void zpodd_on_suspend(struct ata_device *dev);
249bool zpodd_zpready(struct ata_device *dev);
250void zpodd_enable_run_wake(struct ata_device *dev);
251void zpodd_disable_run_wake(struct ata_device *dev);
252void zpodd_post_poweron(struct ata_device *dev);
253#else /* CONFIG_SATA_ZPODD */
254static inline void zpodd_init(struct ata_device *dev) {}
255static inline void zpodd_exit(struct ata_device *dev) {}
256static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; }
257static inline void zpodd_on_suspend(struct ata_device *dev) {}
258static inline bool zpodd_zpready(struct ata_device *dev) { return false; }
259static inline void zpodd_enable_run_wake(struct ata_device *dev) {}
260static inline void zpodd_disable_run_wake(struct ata_device *dev) {}
261static inline void zpodd_post_poweron(struct ata_device *dev) {}
262#endif /* CONFIG_SATA_ZPODD */
263
264#endif /* __LIBATA_H__ */
Linux kernel - Deliverables
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