2 * libata.h - helper library for ATA
4 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
5 * Copyright 2003-2004 Jeff Garzik
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)
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.
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.
23 * libata documentation is available via 'make {ps|pdf}docs',
24 * as Documentation/DocBook/libata.*
31 #define DRV_NAME "libata"
32 #define DRV_VERSION "3.00" /* must be exactly four chars */
34 struct ata_scsi_args {
35 struct ata_device *dev;
37 struct scsi_cmnd *cmd;
38 void (*done)(struct scsi_cmnd *);
41 static inline int ata_is_builtin_hardreset(ata_reset_fn_t reset)
43 if (reset == sata_std_hardreset)
46 if (reset == sata_sff_hardreset)
54 /* flags for ata_dev_read_id() */
55 ATA_READID_POSTRESET = (1 << 0), /* reading ID after reset */
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 */
64 ATA_DNXFER_QUIET = (1 << 31),
67 extern unsigned int ata_print_id;
68 extern struct workqueue_struct *ata_aux_wq;
69 extern int atapi_passthru16;
70 extern int libata_fua;
71 extern int libata_noacpi;
72 extern int libata_allow_tpm;
73 extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
74 extern void ata_force_cbl(struct ata_port *ap);
75 extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
76 extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
77 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag);
78 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
79 u64 block, u32 n_block, unsigned int tf_flags,
81 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
82 extern void ata_dev_disable(struct ata_device *dev);
83 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
85 extern void ata_port_flush_task(struct ata_port *ap);
86 extern 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);
90 extern 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);
94 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
95 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
96 int (*check_ready)(struct ata_link *link));
97 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
98 unsigned int flags, u16 *id);
99 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
100 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
101 unsigned int readid_flags);
102 extern int ata_dev_configure(struct ata_device *dev);
103 extern int sata_down_spd_limit(struct ata_link *link);
104 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
105 extern void ata_sg_clean(struct ata_queued_cmd *qc);
106 extern void ata_qc_issue(struct ata_queued_cmd *qc);
107 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
108 extern int atapi_check_dma(struct ata_queued_cmd *qc);
109 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
110 extern bool ata_phys_link_online(struct ata_link *link);
111 extern bool ata_phys_link_offline(struct ata_link *link);
112 extern void ata_dev_init(struct ata_device *dev);
113 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
114 extern int sata_link_init_spd(struct ata_link *link);
115 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
116 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
117 extern struct ata_port *ata_port_alloc(struct ata_host *host);
118 extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy);
119 extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm);
122 * ata_qc_free - free unused ata_queued_cmd
123 * @qc: Command to complete
125 * Designed to free unused ata_queued_cmd object
126 * in case something prevents using it.
129 * spin_lock_irqsave(host lock)
131 static inline void ata_qc_free(struct ata_queued_cmd *qc)
134 qc->tag = ATA_TAG_POISON;
138 #ifdef CONFIG_ATA_ACPI
139 extern void ata_acpi_associate_sata_port(struct ata_port *ap);
140 extern void ata_acpi_associate(struct ata_host *host);
141 extern void ata_acpi_dissociate(struct ata_host *host);
142 extern int ata_acpi_on_suspend(struct ata_port *ap);
143 extern void ata_acpi_on_resume(struct ata_port *ap);
144 extern int ata_acpi_on_devcfg(struct ata_device *dev);
145 extern void ata_acpi_on_disable(struct ata_device *dev);
146 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
148 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
149 static inline void ata_acpi_associate(struct ata_host *host) { }
150 static inline void ata_acpi_dissociate(struct ata_host *host) { }
151 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
152 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
153 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
154 static inline void ata_acpi_on_disable(struct ata_device *dev) { }
155 static inline void ata_acpi_set_state(struct ata_port *ap,
156 pm_message_t state) { }
160 extern int ata_scsi_add_hosts(struct ata_host *host,
161 struct scsi_host_template *sht);
162 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
163 extern int ata_scsi_offline_dev(struct ata_device *dev);
164 extern void ata_scsi_media_change_notify(struct ata_device *dev);
165 extern void ata_scsi_hotplug(struct work_struct *work);
166 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
167 extern void ata_scsi_dev_rescan(struct work_struct *work);
168 extern int ata_bus_probe(struct ata_port *ap);
171 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
172 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
173 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
174 extern void ata_scsi_error(struct Scsi_Host *host);
175 extern void ata_port_wait_eh(struct ata_port *ap);
176 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
177 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
178 extern void ata_eh_detach_dev(struct ata_device *dev);
179 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
180 unsigned int action);
181 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
182 unsigned int action);
183 extern void ata_eh_autopsy(struct ata_port *ap);
184 extern void ata_eh_report(struct ata_port *ap);
185 extern int ata_eh_reset(struct ata_link *link, int classify,
186 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
187 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
188 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
189 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
190 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
191 ata_postreset_fn_t postreset,
192 struct ata_link **r_failed_disk);
193 extern void ata_eh_finish(struct ata_port *ap);
196 #ifdef CONFIG_SATA_PMP
197 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
198 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
199 extern int sata_pmp_attach(struct ata_device *dev);
200 #else /* CONFIG_SATA_PMP */
201 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
206 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
211 static inline int sata_pmp_attach(struct ata_device *dev)
215 #endif /* CONFIG_SATA_PMP */
218 #ifdef CONFIG_ATA_SFF
219 extern void ata_dev_select(struct ata_port *ap, unsigned int device,
220 unsigned int wait, unsigned int can_sleep);
221 extern u8 ata_irq_on(struct ata_port *ap);
222 extern void ata_pio_task(struct work_struct *work);
223 #endif /* CONFIG_ATA_SFF */
225 #endif /* __LIBATA_H__ */