diff options
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 238 |
1 files changed, 171 insertions, 67 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index bf86ee4..db17723 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -108,7 +108,9 @@ enum { LIBATA_MAX_PRD = ATA_MAX_PRD / 2, ATA_MAX_PORTS = 8, ATA_DEF_QUEUE = 1, - ATA_MAX_QUEUE = 1, + /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ + ATA_MAX_QUEUE = 2, + ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, ATA_MAX_SECTORS = 200, /* FIXME */ ATA_MAX_BUS = 2, ATA_DEF_BUSY_WAIT = 10000, @@ -149,11 +151,15 @@ enum { ATA_FLAG_PIO_POLLING = (1 << 10), /* use polling PIO if LLD * doesn't handle PIO interrupts */ - ATA_FLAG_DEBUGMSG = (1 << 17), - ATA_FLAG_FLUSH_PORT_TASK = (1 << 18), /* flush port task */ + ATA_FLAG_DEBUGMSG = (1 << 14), + ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */ - ATA_FLAG_DISABLED = (1 << 19), /* port is disabled, ignore it */ - ATA_FLAG_SUSPENDED = (1 << 20), /* port is suspended */ + ATA_FLAG_EH_PENDING = (1 << 16), /* EH pending */ + ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */ + ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */ + + ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */ + ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */ /* bits 24:31 of ap->flags are reserved for LLDD specific flags */ @@ -163,7 +169,11 @@ enum { ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ - ATA_QCFLAG_EH_SCHEDULED = (1 << 4), /* EH scheduled */ + ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ + + ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ + ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ + ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ /* host set flags */ ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */ @@ -214,8 +224,29 @@ enum { ATA_PORT_PRIMARY = (1 << 0), ATA_PORT_SECONDARY = (1 << 1), + /* ering size */ + ATA_ERING_SIZE = 32, + + /* desc_len for ata_eh_info and context */ + ATA_EH_DESC_LEN = 80, + + /* reset / recovery action types */ + ATA_EH_REVALIDATE = (1 << 0), + ATA_EH_SOFTRESET = (1 << 1), + ATA_EH_HARDRESET = (1 << 2), + + ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, + + /* ata_eh_info->flags */ + ATA_EHI_DID_RESET = (1 << 0), /* already reset this port */ + + /* max repeat if error condition is still set after ->error_handler */ + ATA_EH_MAX_REPEAT = 5, + /* how hard are we gonna try to probe/recover devices */ ATA_PROBE_MAX_TRIES = 3, + ATA_EH_RESET_TRIES = 3, + ATA_EH_DEV_TRIES = 3, }; enum hsm_task_states { @@ -340,7 +371,7 @@ struct ata_queued_cmd { struct scatterlist *__sg; unsigned int err_mask; - + struct ata_taskfile result_tf; ata_qc_cb_t complete_fn; void *private_data; @@ -352,12 +383,24 @@ struct ata_host_stats { unsigned long rw_reqbuf; }; +struct ata_ering_entry { + int is_io; + unsigned int err_mask; + u64 timestamp; +}; + +struct ata_ering { + int cursor; + struct ata_ering_entry ring[ATA_ERING_SIZE]; +}; + struct ata_device { + struct ata_port *ap; u64 n_sectors; /* size of device, if ATA */ unsigned long flags; /* ATA_DFLAG_xxx */ unsigned int class; /* ATA_DEV_xxx */ unsigned int devno; /* 0 or 1 */ - u16 *id; /* IDENTIFY xxx DEVICE data */ + u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ u8 pio_mode; u8 dma_mode; u8 xfer_mode; @@ -377,6 +420,24 @@ struct ata_device { u16 cylinders; /* Number of cylinders */ u16 heads; /* Number of heads */ u16 sectors; /* Number of sectors per track */ + + /* error history */ + struct ata_ering ering; +}; + +struct ata_eh_info { + struct ata_device *dev; /* offending device */ + u32 serror; /* SError from LLDD */ + unsigned int err_mask; /* port-wide err_mask */ + unsigned int action; /* ATA_EH_* action mask */ + unsigned int flags; /* ATA_EHI_* flags */ + char desc[ATA_EH_DESC_LEN]; + int desc_len; +}; + +struct ata_eh_context { + struct ata_eh_info i; + int tries[ATA_MAX_DEVICES]; }; struct ata_port { @@ -403,6 +464,11 @@ struct ata_port { unsigned int cbl; /* cable type; ATA_CBL_xxx */ unsigned int sata_spd_limit; /* SATA PHY speed limit */ + /* record runtime error info, protected by host_set lock */ + struct ata_eh_info eh_info; + /* EH context owned by EH */ + struct ata_eh_context eh_context; + struct ata_device device[ATA_MAX_DEVICES]; struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; @@ -421,6 +487,8 @@ struct ata_port { struct list_head eh_done_q; void *private_data; + + u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ }; struct ata_port_operations { @@ -454,7 +522,15 @@ struct ata_port_operations { void (*qc_prep) (struct ata_queued_cmd *qc); unsigned int (*qc_issue) (struct ata_queued_cmd *qc); - void (*eng_timeout) (struct ata_port *ap); + /* Error handlers. ->error_handler overrides ->eng_timeout and + * indicates that new-style EH is in place. + */ + void (*eng_timeout) (struct ata_port *ap); /* obsolete */ + + void (*freeze) (struct ata_port *ap); + void (*thaw) (struct ata_port *ap); + void (*error_handler) (struct ata_port *ap); + void (*post_internal_cmd) (struct ata_queued_cmd *qc); irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); void (*irq_clear) (struct ata_port *); @@ -500,7 +576,7 @@ extern void ata_port_probe(struct ata_port *); extern void __sata_phy_reset(struct ata_port *ap); extern void sata_phy_reset(struct ata_port *ap); extern void ata_bus_reset(struct ata_port *ap); -extern int ata_set_sata_spd(struct ata_port *ap); +extern int sata_set_spd(struct ata_port *ap); extern int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, ata_reset_fn_t softreset, ata_reset_fn_t hardreset, @@ -509,8 +585,7 @@ extern void ata_std_probeinit(struct ata_port *ap); extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); -extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, - int post_reset); +extern int ata_dev_revalidate(struct ata_device *dev, int post_reset); extern void ata_port_disable(struct ata_port *); extern void ata_std_ports(struct ata_ioports *ioaddr); #ifdef CONFIG_PCI @@ -526,14 +601,18 @@ extern void ata_host_set_remove(struct ata_host_set *host_set); extern int ata_scsi_detect(struct scsi_host_template *sht); extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); -extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); -extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); extern int ata_scsi_release(struct Scsi_Host *host); extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); +extern int sata_scr_valid(struct ata_port *ap); +extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); +extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); +extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); +extern int ata_port_online(struct ata_port *ap); +extern int ata_port_offline(struct ata_port *ap); extern int ata_scsi_device_resume(struct scsi_device *); extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); -extern int ata_device_resume(struct ata_port *, struct ata_device *); -extern int ata_device_suspend(struct ata_port *, struct ata_device *, pm_message_t state); +extern int ata_device_resume(struct ata_device *); +extern int ata_device_suspend(struct ata_device *, pm_message_t state); extern int ata_ratelimit(void); extern unsigned int ata_busy_sleep(struct ata_port *ap, unsigned long timeout_pat, @@ -578,16 +657,22 @@ extern void ata_bmdma_start (struct ata_queued_cmd *qc); extern void ata_bmdma_stop(struct ata_queued_cmd *qc); extern u8 ata_bmdma_status(struct ata_port *ap); extern void ata_bmdma_irq_clear(struct ata_port *ap); -extern void __ata_qc_complete(struct ata_queued_cmd *qc); -extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd, +extern void ata_bmdma_freeze(struct ata_port *ap); +extern void ata_bmdma_thaw(struct ata_port *ap); +extern void ata_bmdma_drive_eh(struct ata_port *ap, + ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, + ata_postreset_fn_t postreset); +extern void ata_bmdma_error_handler(struct ata_port *ap); +extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); +extern void ata_qc_complete(struct ata_queued_cmd *qc); +extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); extern int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]); extern int ata_scsi_slave_config(struct scsi_device *sdev); -extern struct ata_device *ata_dev_pair(struct ata_port *ap, - struct ata_device *adev); +extern struct ata_device *ata_dev_pair(struct ata_device *adev); /* * Timing helpers @@ -637,10 +722,46 @@ extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_ * EH */ extern void ata_eng_timeout(struct ata_port *ap); + +extern void ata_port_schedule_eh(struct ata_port *ap); +extern int ata_port_abort(struct ata_port *ap); +extern int ata_port_freeze(struct ata_port *ap); + +extern void ata_eh_freeze_port(struct ata_port *ap); +extern void ata_eh_thaw_port(struct ata_port *ap); + extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); +extern void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, ata_postreset_fn_t postreset); + +/* + * printk helpers + */ +#define ata_port_printk(ap, lv, fmt, args...) \ + printk(lv"ata%u: "fmt, (ap)->id , ##args) + +#define ata_dev_printk(dev, lv, fmt, args...) \ + printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) +/* + * ata_eh_info helpers + */ +#define ata_ehi_push_desc(ehi, fmt, args...) do { \ + (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ + ATA_EH_DESC_LEN - (ehi)->desc_len, \ + fmt , ##args); \ +} while (0) + +#define ata_ehi_clear_desc(ehi) do { \ + (ehi)->desc[0] = '\0'; \ + (ehi)->desc_len = 0; \ +} while (0) + +/* + * qc helpers + */ static inline int ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) { @@ -683,6 +804,11 @@ static inline unsigned int ata_tag_valid(unsigned int tag) return (tag < ATA_MAX_QUEUE) ? 1 : 0; } +static inline unsigned int ata_tag_internal(unsigned int tag) +{ + return tag == ATA_MAX_QUEUE - 1; +} + static inline unsigned int ata_class_enabled(unsigned int class) { return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; @@ -791,20 +917,35 @@ static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) qc->tf.ctl |= ATA_NIEN; } -static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, - unsigned int tag) +static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) { if (likely(ata_tag_valid(tag))) return &ap->qcmd[tag]; return NULL; } -static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) +static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) +{ + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (unlikely(!qc) || !ap->ops->error_handler) + return qc; + + if ((qc->flags & (ATA_QCFLAG_ACTIVE | + ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) + return qc; + + return NULL; +} + +static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) { memset(tf, 0, sizeof(*tf)); - tf->ctl = ap->ctl; - if (device == 0) + tf->ctl = dev->ap->ctl; + if (dev->devno == 0) tf->device = ATA_DEVICE_OBS; else tf->device = ATA_DEVICE_OBS | ATA_DEV1; @@ -819,26 +960,11 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc) qc->nbytes = qc->curbytes = 0; qc->err_mask = 0; - ata_tf_init(qc->ap, &qc->tf, qc->dev->devno); -} - -/** - * ata_qc_complete - Complete an active ATA command - * @qc: Command to complete - * @err_mask: ATA Status register contents - * - * Indicate to the mid and upper layers that an ATA - * command has completed, with either an ok or not-ok status. - * - * LOCKING: - * spin_lock_irqsave(host_set lock) - */ -static inline void ata_qc_complete(struct ata_queued_cmd *qc) -{ - if (unlikely(qc->flags & ATA_QCFLAG_EH_SCHEDULED)) - return; + ata_tf_init(qc->dev, &qc->tf); - __ata_qc_complete(qc); + /* init result_tf such that it indicates normal completion */ + qc->result_tf.command = ATA_DRDY; + qc->result_tf.feature = 0; } /** @@ -917,28 +1043,6 @@ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) return status; } -static inline u32 scr_read(struct ata_port *ap, unsigned int reg) -{ - return ap->ops->scr_read(ap, reg); -} - -static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) -{ - ap->ops->scr_write(ap, reg, val); -} - -static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, - u32 val) -{ - ap->ops->scr_write(ap, reg, val); - (void) ap->ops->scr_read(ap, reg); -} - -static inline unsigned int sata_dev_present(struct ata_port *ap) -{ - return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; -} - static inline int ata_try_flush_cache(const struct ata_device *dev) { return ata_id_wcache_enabled(dev->id) || |