diff options
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r-- | include/linux/libata.h | 249 |
1 files changed, 157 insertions, 92 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index a8b508eeff1f..270aeaf17ba5 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -122,6 +122,8 @@ enum { ATAPI_MAX_DRAIN = 16 << 10, + ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, + ATA_SHT_EMULATED = 1, ATA_SHT_CMD_PER_LUN = 1, ATA_SHT_THIS_ID = -1, @@ -163,9 +165,6 @@ enum { ATA_DEV_NONE = 9, /* no device */ /* struct ata_link flags */ - ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */ - ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H - * Register FIS clearing BSY */ ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ @@ -292,16 +291,15 @@ enum { /* reset / recovery action types */ ATA_EH_REVALIDATE = (1 << 0), - ATA_EH_SOFTRESET = (1 << 1), - ATA_EH_HARDRESET = (1 << 2), + ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ + ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ + ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, ATA_EH_ENABLE_LINK = (1 << 3), - ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, /* ata_eh_info->flags */ ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ - ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ ATA_EHI_QUIET = (1 << 3), /* be quiet */ ATA_EHI_LPM = (1 << 4), /* link power management action */ @@ -313,7 +311,6 @@ enum { ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, - ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, /* max tries if error condition is still set after ->error_handler */ ATA_EH_MAX_TRIES = 5, @@ -435,7 +432,7 @@ struct ata_host { void __iomem * const *iomap; unsigned int n_ports; void *private_data; - const struct ata_port_operations *ops; + struct ata_port_operations *ops; unsigned long flags; #ifdef CONFIG_ATA_ACPI acpi_handle acpi_handle; @@ -604,7 +601,7 @@ struct ata_link { struct ata_port { struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ - const struct ata_port_operations *ops; + struct ata_port_operations *ops; spinlock_t *lock; unsigned long flags; /* ATA_FLAG_xxx */ unsigned int pflags; /* ATA_PFLAG_xxx */ @@ -666,81 +663,104 @@ struct ata_port { u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ }; -struct ata_port_operations { - void (*dev_config) (struct ata_device *); - - void (*set_piomode) (struct ata_port *, struct ata_device *); - void (*set_dmamode) (struct ata_port *, struct ata_device *); - unsigned long (*mode_filter) (struct ata_device *, unsigned long); +/* The following initializer overrides a method to NULL whether one of + * its parent has the method defined or not. This is equivalent to + * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant + * expression and thus can't be used as an initializer. + */ +#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) - void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); - void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); +struct ata_port_operations { + /* + * Command execution + */ + int (*qc_defer)(struct ata_queued_cmd *qc); + int (*check_atapi_dma)(struct ata_queued_cmd *qc); + void (*qc_prep)(struct ata_queued_cmd *qc); + unsigned int (*qc_issue)(struct ata_queued_cmd *qc); - void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); + /* + * Configuration and exception handling + */ + int (*cable_detect)(struct ata_port *ap); + unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); + void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); + void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); + int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); + + void (*dev_config)(struct ata_device *dev); + + void (*freeze)(struct ata_port *ap); + void (*thaw)(struct ata_port *ap); + ata_prereset_fn_t prereset; + ata_reset_fn_t softreset; + ata_reset_fn_t hardreset; + ata_postreset_fn_t postreset; + ata_prereset_fn_t pmp_prereset; + ata_reset_fn_t pmp_softreset; + ata_reset_fn_t pmp_hardreset; + ata_postreset_fn_t pmp_postreset; + void (*error_handler)(struct ata_port *ap); + void (*post_internal_cmd)(struct ata_queued_cmd *qc); + + /* + * Optional features + */ + int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val); + int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val); + void (*pmp_attach)(struct ata_port *ap); + void (*pmp_detach)(struct ata_port *ap); + int (*enable_pm)(struct ata_port *ap, enum link_pm policy); + void (*disable_pm)(struct ata_port *ap); + + /* + * Start, stop, suspend and resume + */ + int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); + int (*port_resume)(struct ata_port *ap); + int (*port_start)(struct ata_port *ap); + void (*port_stop)(struct ata_port *ap); + void (*host_stop)(struct ata_host *host); + + /* + * SFF / taskfile oriented ops + */ + void (*dev_select)(struct ata_port *ap, unsigned int device); u8 (*check_status)(struct ata_port *ap); u8 (*check_altstatus)(struct ata_port *ap); - void (*dev_select)(struct ata_port *ap, unsigned int device); - - void (*phy_reset) (struct ata_port *ap); /* obsolete */ - int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev); - - int (*cable_detect) (struct ata_port *ap); - - int (*check_atapi_dma) (struct ata_queued_cmd *qc); - - void (*bmdma_setup) (struct ata_queued_cmd *qc); - void (*bmdma_start) (struct ata_queued_cmd *qc); - - unsigned int (*data_xfer) (struct ata_device *dev, unsigned char *buf, - unsigned int buflen, int rw); - - int (*qc_defer) (struct ata_queued_cmd *qc); - void (*qc_prep) (struct ata_queued_cmd *qc); - unsigned int (*qc_issue) (struct ata_queued_cmd *qc); - - /* port multiplier */ - void (*pmp_attach) (struct ata_port *ap); - void (*pmp_detach) (struct ata_port *ap); - - /* Error handlers. ->error_handler overrides ->eng_timeout and - * indicates that new-style EH is in place. + void (*tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); + void (*tf_read)(struct ata_port *ap, struct ata_taskfile *tf); + void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); + unsigned int (*data_xfer)(struct ata_device *dev, unsigned char *buf, + unsigned int buflen, int rw); + u8 (*irq_on)(struct ata_port *); + + void (*irq_clear)(struct ata_port *); + void (*bmdma_setup)(struct ata_queued_cmd *qc); + void (*bmdma_start)(struct ata_queued_cmd *qc); + void (*bmdma_stop)(struct ata_queued_cmd *qc); + u8 (*bmdma_status)(struct ata_port *ap); + + /* + * Obsolete */ - 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); - - irq_handler_t irq_handler; - void (*irq_clear) (struct ata_port *); - u8 (*irq_on) (struct ata_port *); - - int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val); - int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val); + void (*phy_reset)(struct ata_port *ap); + void (*eng_timeout)(struct ata_port *ap); - int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); - int (*port_resume) (struct ata_port *ap); - int (*enable_pm) (struct ata_port *ap, enum link_pm policy); - void (*disable_pm) (struct ata_port *ap); - int (*port_start) (struct ata_port *ap); - void (*port_stop) (struct ata_port *ap); - - void (*host_stop) (struct ata_host *host); - - void (*bmdma_stop) (struct ata_queued_cmd *qc); - u8 (*bmdma_status) (struct ata_port *ap); + /* + * ->inherits must be the last field and all the preceding + * fields must be pointers. + */ + const struct ata_port_operations *inherits; }; struct ata_port_info { - struct scsi_host_template *sht; unsigned long flags; unsigned long link_flags; unsigned long pio_mask; unsigned long mwdma_mask; unsigned long udma_mask; - const struct ata_port_operations *port_ops; - irq_handler_t irq_handler; + struct ata_port_operations *port_ops; void *private_data; }; @@ -762,7 +782,7 @@ extern const unsigned long sata_deb_timing_normal[]; extern const unsigned long sata_deb_timing_hotplug[]; extern const unsigned long sata_deb_timing_long[]; -extern const struct ata_port_operations ata_dummy_port_ops; +extern struct ata_port_operations ata_dummy_port_ops; extern const struct ata_port_info ata_dummy_port_info; static inline const unsigned long * @@ -809,7 +829,7 @@ extern int ata_host_activate(struct ata_host *host, int irq, struct scsi_host_template *sht); extern void ata_host_detach(struct ata_host *host); extern void ata_host_init(struct ata_host *, struct device *, - unsigned long, const struct ata_port_operations *); + unsigned long, struct ata_port_operations *); 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 *)); @@ -892,12 +912,9 @@ 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_noop_irq_clear(struct ata_port *ap); 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_prereset_fn_t prereset, - 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 int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, @@ -1002,7 +1019,8 @@ static inline int ata_acpi_cbl_80wire(struct ata_port *ap, struct pci_dev; extern int ata_pci_init_one(struct pci_dev *pdev, - const struct ata_port_info * const * ppi); + const struct ata_port_info * const * ppi, + struct scsi_host_template *sht, void *host_priv); extern void ata_pci_remove_one(struct pci_dev *pdev); #ifdef CONFIG_PM extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); @@ -1040,11 +1058,7 @@ extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline); extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline); extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class); -extern void sata_pmp_do_eh(struct ata_port *ap, - ata_prereset_fn_t prereset, ata_reset_fn_t softreset, - ata_reset_fn_t hardreset, ata_postreset_fn_t postreset, - ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset, - ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset); +extern void sata_pmp_error_handler(struct ata_port *ap); /* * EH @@ -1064,6 +1078,64 @@ extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, ata_reset_fn_t softreset, ata_reset_fn_t hardreset, ata_postreset_fn_t postreset); +extern void ata_std_error_handler(struct ata_port *ap); + +/* + * Base operations to inherit from and initializers for sht + * + * Operations + * + * base : Common to all libata drivers. + * sata : SATA controllers w/ native interface. + * pmp : SATA controllers w/ PMP support. + * sff : SFF ATA controllers w/o BMDMA support. + * bmdma : SFF ATA controllers w/ BMDMA support. + * + * sht initializers + * + * BASE : Common to all libata drivers. The user must set + * sg_tablesize and dma_boundary. + * PIO : SFF ATA controllers w/ only PIO support. + * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and + * dma_boundary are set to BMDMA limits. + * NCQ : SATA controllers supporting NCQ. The user must set + * sg_tablesize, dma_boundary and can_queue. + */ +extern const struct ata_port_operations ata_base_port_ops; +extern const struct ata_port_operations sata_port_ops; +extern const struct ata_port_operations sata_pmp_port_ops; +extern const struct ata_port_operations ata_sff_port_ops; +extern const struct ata_port_operations ata_bmdma_port_ops; + +#define ATA_BASE_SHT(drv_name) \ + .module = THIS_MODULE, \ + .name = drv_name, \ + .ioctl = ata_scsi_ioctl, \ + .queuecommand = ata_scsi_queuecmd, \ + .can_queue = ATA_DEF_QUEUE, \ + .this_id = ATA_SHT_THIS_ID, \ + .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ + .emulated = ATA_SHT_EMULATED, \ + .use_clustering = ATA_SHT_USE_CLUSTERING, \ + .proc_name = drv_name, \ + .slave_configure = ata_scsi_slave_config, \ + .slave_destroy = ata_scsi_slave_destroy, \ + .bios_param = ata_std_bios_param + +/* PIO only, sg_tablesize and dma_boundary limits can be removed */ +#define ATA_PIO_SHT(drv_name) \ + ATA_BASE_SHT(drv_name), \ + .sg_tablesize = LIBATA_MAX_PRD, \ + .dma_boundary = ATA_DMA_BOUNDARY + +#define ATA_BMDMA_SHT(drv_name) \ + ATA_BASE_SHT(drv_name), \ + .sg_tablesize = LIBATA_MAX_PRD, \ + .dma_boundary = ATA_DMA_BOUNDARY + +#define ATA_NCQ_SHT(drv_name) \ + ATA_BASE_SHT(drv_name), \ + .change_queue_depth = ata_scsi_change_queue_depth /* * printk helpers @@ -1092,18 +1164,11 @@ extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); -static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi) -{ - ehi->flags |= ATA_EHI_RESUME_LINK; - ehi->action |= ATA_EH_SOFTRESET; - ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; -} - static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) { - ata_ehi_schedule_probe(ehi); + ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; ehi->flags |= ATA_EHI_HOTPLUGGED; - ehi->action |= ATA_EH_ENABLE_LINK; + ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; ehi->err_mask |= AC_ERR_ATA_BUS; } |