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 34 struct 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 */ 42 enum { 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 56 extern atomic_t ata_print_id; 57 extern int atapi_passthru16; 58 extern int libata_fua; 59 extern int libata_noacpi; 60 extern int libata_allow_tpm; 61 extern struct device_type ata_port_type; 62 extern struct ata_link *ata_dev_phys_link(struct ata_device *dev); 63 extern void ata_force_cbl(struct ata_port *ap); 64 extern u64 ata_tf_to_lba(const struct ata_taskfile *tf); 65 extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf); 66 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev); 67 extern 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); 70 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev); 71 extern 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); 75 extern 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); 79 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd); 80 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline, 81 int (*check_ready)(struct ata_link *link)); 82 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 83 unsigned int flags, u16 *id); 84 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); 85 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 86 unsigned int readid_flags); 87 extern int ata_dev_configure(struct ata_device *dev); 88 extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); 89 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); 90 extern unsigned int ata_dev_set_feature(struct ata_device *dev, 91 u8 enable, u8 feature); 92 extern void ata_sg_clean(struct ata_queued_cmd *qc); 93 extern void ata_qc_free(struct ata_queued_cmd *qc); 94 extern void ata_qc_issue(struct ata_queued_cmd *qc); 95 extern void __ata_qc_complete(struct ata_queued_cmd *qc); 96 extern int atapi_check_dma(struct ata_queued_cmd *qc); 97 extern void swap_buf_le16(u16 *buf, unsigned int buf_words); 98 extern bool ata_phys_link_online(struct ata_link *link); 99 extern bool ata_phys_link_offline(struct ata_link *link); 100 extern void ata_dev_init(struct ata_device *dev); 101 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp); 102 extern int sata_link_init_spd(struct ata_link *link); 103 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg); 104 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg); 105 extern struct ata_port *ata_port_alloc(struct ata_host *host); 106 extern const char *sata_spd_string(unsigned int spd); 107 extern int ata_port_probe(struct ata_port *ap); 108 extern 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 114 extern unsigned int ata_acpi_gtf_filter; 115 extern void ata_acpi_dissociate(struct ata_host *host); 116 extern int ata_acpi_on_suspend(struct ata_port *ap); 117 extern void ata_acpi_on_resume(struct ata_port *ap); 118 extern int ata_acpi_on_devcfg(struct ata_device *dev); 119 extern void ata_acpi_on_disable(struct ata_device *dev); 120 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state); 121 extern void ata_acpi_bind_port(struct ata_port *ap); 122 extern void ata_acpi_bind_dev(struct ata_device *dev); 123 extern acpi_handle ata_dev_acpi_handle(struct ata_device *dev); 124 #else 125 static inline void ata_acpi_dissociate(struct ata_host *host) { } 126 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; } 127 static inline void ata_acpi_on_resume(struct ata_port *ap) { } 128 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; } 129 static inline void ata_acpi_on_disable(struct ata_device *dev) { } 130 static inline void ata_acpi_set_state(struct ata_port *ap, 131 pm_message_t state) { } 132 static inline void ata_acpi_bind_port(struct ata_port *ap) {} 133 static inline void ata_acpi_bind_dev(struct ata_device *dev) {} 134 #endif 135 136 /* libata-scsi.c */ 137 extern int ata_scsi_add_hosts(struct ata_host *host, 138 struct scsi_host_template *sht); 139 extern void ata_scsi_scan_host(struct ata_port *ap, int sync); 140 extern int ata_scsi_offline_dev(struct ata_device *dev); 141 extern void ata_scsi_media_change_notify(struct ata_device *dev); 142 extern void ata_scsi_hotplug(struct work_struct *work); 143 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost); 144 extern void ata_scsi_dev_rescan(struct work_struct *work); 145 extern int ata_bus_probe(struct ata_port *ap); 146 extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 147 unsigned int id, unsigned int lun); 148 149 150 /* libata-eh.c */ 151 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd); 152 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd); 153 extern void ata_eh_acquire(struct ata_port *ap); 154 extern void ata_eh_release(struct ata_port *ap); 155 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); 156 extern void ata_scsi_error(struct Scsi_Host *host); 157 extern void ata_eh_fastdrain_timerfn(unsigned long arg); 158 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc); 159 extern void ata_dev_disable(struct ata_device *dev); 160 extern void ata_eh_detach_dev(struct ata_device *dev); 161 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, 162 unsigned int action); 163 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev, 164 unsigned int action); 165 extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log, 166 u8 page, void *buf, unsigned int sectors); 167 extern void ata_eh_autopsy(struct ata_port *ap); 168 const char *ata_get_cmd_descript(u8 command); 169 extern void ata_eh_report(struct ata_port *ap); 170 extern 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); 173 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 174 extern 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); 178 extern void ata_eh_finish(struct ata_port *ap); 179 extern int ata_ering_map(struct ata_ering *ering, 180 int (*map_fn)(struct ata_ering_entry *, void *), 181 void *arg); 182 extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key); 183 extern unsigned int atapi_eh_request_sense(struct ata_device *dev, 184 u8 *sense_buf, u8 dfl_sense_key); 185 186 /* libata-pmp.c */ 187 #ifdef CONFIG_SATA_PMP 188 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val); 189 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val); 190 extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, 191 unsigned hints); 192 extern int sata_pmp_attach(struct ata_device *dev); 193 #else /* CONFIG_SATA_PMP */ 194 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val) 195 { 196 return -EINVAL; 197 } 198 199 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) 200 { 201 return -EINVAL; 202 } 203 204 static inline int sata_pmp_set_lpm(struct ata_link *link, 205 enum ata_lpm_policy policy, unsigned hints) 206 { 207 return -EINVAL; 208 } 209 210 static inline int sata_pmp_attach(struct ata_device *dev) 211 { 212 return -EINVAL; 213 } 214 #endif /* CONFIG_SATA_PMP */ 215 216 /* libata-sff.c */ 217 #ifdef CONFIG_ATA_SFF 218 extern void ata_sff_flush_pio_task(struct ata_port *ap); 219 extern void ata_sff_port_init(struct ata_port *ap); 220 extern int ata_sff_init(void); 221 extern void ata_sff_exit(void); 222 #else /* CONFIG_ATA_SFF */ 223 static inline void ata_sff_flush_pio_task(struct ata_port *ap) 224 { } 225 static inline void ata_sff_port_init(struct ata_port *ap) 226 { } 227 static inline int ata_sff_init(void) 228 { return 0; } 229 static inline void ata_sff_exit(void) 230 { } 231 #endif /* CONFIG_ATA_SFF */ 232 233 /* libata-zpodd.c */ 234 #ifdef CONFIG_SATA_ZPODD 235 void zpodd_init(struct ata_device *dev); 236 void zpodd_exit(struct ata_device *dev); 237 static inline bool zpodd_dev_enabled(struct ata_device *dev) 238 { 239 return dev->zpodd != NULL; 240 } 241 void zpodd_on_suspend(struct ata_device *dev); 242 bool zpodd_zpready(struct ata_device *dev); 243 void zpodd_enable_run_wake(struct ata_device *dev); 244 void zpodd_disable_run_wake(struct ata_device *dev); 245 void zpodd_post_poweron(struct ata_device *dev); 246 #else /* CONFIG_SATA_ZPODD */ 247 static inline void zpodd_init(struct ata_device *dev) {} 248 static inline void zpodd_exit(struct ata_device *dev) {} 249 static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; } 250 static inline void zpodd_on_suspend(struct ata_device *dev) {} 251 static inline bool zpodd_zpready(struct ata_device *dev) { return false; } 252 static inline void zpodd_enable_run_wake(struct ata_device *dev) {} 253 static inline void zpodd_disable_run_wake(struct ata_device *dev) {} 254 static inline void zpodd_post_poweron(struct ata_device *dev) {} 255 #endif /* CONFIG_SATA_ZPODD */ 256 257 #endif /* __LIBATA_H__ */ 258