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 static 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 */ 53 enum { 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 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); 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, 80 unsigned int tag); 81 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev); 82 extern void ata_port_flush_task(struct ata_port *ap); 83 extern unsigned ata_exec_internal(struct ata_device *dev, 84 struct ata_taskfile *tf, const u8 *cdb, 85 int dma_dir, void *buf, unsigned int buflen, 86 unsigned long timeout); 87 extern unsigned ata_exec_internal_sg(struct ata_device *dev, 88 struct ata_taskfile *tf, const u8 *cdb, 89 int dma_dir, struct scatterlist *sg, 90 unsigned int n_elem, unsigned long timeout); 91 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd); 92 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline, 93 int (*check_ready)(struct ata_link *link)); 94 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 95 unsigned int flags, u16 *id); 96 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); 97 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 98 unsigned int readid_flags); 99 extern int ata_dev_configure(struct ata_device *dev); 100 extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); 101 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); 102 extern void ata_sg_clean(struct ata_queued_cmd *qc); 103 extern void ata_qc_free(struct ata_queued_cmd *qc); 104 extern void ata_qc_issue(struct ata_queued_cmd *qc); 105 extern void __ata_qc_complete(struct ata_queued_cmd *qc); 106 extern int atapi_check_dma(struct ata_queued_cmd *qc); 107 extern void swap_buf_le16(u16 *buf, unsigned int buf_words); 108 extern bool ata_phys_link_online(struct ata_link *link); 109 extern bool ata_phys_link_offline(struct ata_link *link); 110 extern void ata_dev_init(struct ata_device *dev); 111 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp); 112 extern int sata_link_init_spd(struct ata_link *link); 113 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg); 114 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg); 115 extern struct ata_port *ata_port_alloc(struct ata_host *host); 116 extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy); 117 extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm); 118 119 /* libata-acpi.c */ 120 #ifdef CONFIG_ATA_ACPI 121 extern unsigned int ata_acpi_gtf_filter; 122 123 extern void ata_acpi_associate_sata_port(struct ata_port *ap); 124 extern void ata_acpi_associate(struct ata_host *host); 125 extern void ata_acpi_dissociate(struct ata_host *host); 126 extern int ata_acpi_on_suspend(struct ata_port *ap); 127 extern void ata_acpi_on_resume(struct ata_port *ap); 128 extern int ata_acpi_on_devcfg(struct ata_device *dev); 129 extern void ata_acpi_on_disable(struct ata_device *dev); 130 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state); 131 #else 132 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { } 133 static inline void ata_acpi_associate(struct ata_host *host) { } 134 static inline void ata_acpi_dissociate(struct ata_host *host) { } 135 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; } 136 static inline void ata_acpi_on_resume(struct ata_port *ap) { } 137 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; } 138 static inline void ata_acpi_on_disable(struct ata_device *dev) { } 139 static inline void ata_acpi_set_state(struct ata_port *ap, 140 pm_message_t state) { } 141 #endif 142 143 /* libata-scsi.c */ 144 extern int ata_scsi_add_hosts(struct ata_host *host, 145 struct scsi_host_template *sht); 146 extern void ata_scsi_scan_host(struct ata_port *ap, int sync); 147 extern int ata_scsi_offline_dev(struct ata_device *dev); 148 extern void ata_scsi_media_change_notify(struct ata_device *dev); 149 extern void ata_scsi_hotplug(struct work_struct *work); 150 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost); 151 extern void ata_scsi_dev_rescan(struct work_struct *work); 152 extern int ata_bus_probe(struct ata_port *ap); 153 154 /* libata-eh.c */ 155 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd); 156 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd); 157 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); 158 extern void ata_scsi_error(struct Scsi_Host *host); 159 extern void ata_port_wait_eh(struct ata_port *ap); 160 extern void ata_eh_fastdrain_timerfn(unsigned long arg); 161 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc); 162 extern void ata_dev_disable(struct ata_device *dev); 163 extern void ata_eh_detach_dev(struct ata_device *dev); 164 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev, 165 unsigned int action); 166 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev, 167 unsigned int action); 168 extern void ata_eh_autopsy(struct ata_port *ap); 169 const char *ata_get_cmd_descript(u8 command); 170 extern void ata_eh_report(struct ata_port *ap); 171 extern int ata_eh_reset(struct ata_link *link, int classify, 172 ata_prereset_fn_t prereset, ata_reset_fn_t softreset, 173 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset); 174 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 175 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, 176 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 177 ata_postreset_fn_t postreset, 178 struct ata_link **r_failed_disk); 179 extern void ata_eh_finish(struct ata_port *ap); 180 181 /* libata-pmp.c */ 182 #ifdef CONFIG_SATA_PMP 183 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val); 184 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val); 185 extern int sata_pmp_attach(struct ata_device *dev); 186 #else /* CONFIG_SATA_PMP */ 187 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val) 188 { 189 return -EINVAL; 190 } 191 192 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) 193 { 194 return -EINVAL; 195 } 196 197 static inline int sata_pmp_attach(struct ata_device *dev) 198 { 199 return -EINVAL; 200 } 201 #endif /* CONFIG_SATA_PMP */ 202 203 /* libata-sff.c */ 204 #ifdef CONFIG_ATA_SFF 205 extern void ata_dev_select(struct ata_port *ap, unsigned int device, 206 unsigned int wait, unsigned int can_sleep); 207 extern u8 ata_irq_on(struct ata_port *ap); 208 extern void ata_pio_task(struct work_struct *work); 209 #endif /* CONFIG_ATA_SFF */ 210 211 #endif /* __LIBATA_H__ */ 212