| /* |
| Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| Copyright 2003-2004 Jeff Garzik |
| |
| The contents of this file are subject to the Open |
| Software License version 1.1 that can be found at |
| http://www.opensource.org/licenses/osl-1.1.txt and is included herein |
| by reference. |
| |
| Alternatively, the contents of this file may be used under the terms |
| of the GNU General Public License version 2 (the "GPL") as distributed |
| in the kernel source COPYING file, in which case the provisions of |
| the GPL are applicable instead of the above. If you wish to allow |
| the use of your version of this file only under the terms of the |
| GPL and not to allow others to use your version of this file under |
| the OSL, indicate your decision by deleting the provisions above and |
| replace them with the notice and other provisions required by the GPL. |
| If you do not delete the provisions above, a recipient may use your |
| version of this file under either the OSL or the GPL. |
| |
| */ |
| |
| #ifndef __LINUX_LIBATA_H__ |
| #define __LINUX_LIBATA_H__ |
| |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <asm/io.h> |
| #include <linux/ata.h> |
| #include <linux/workqueue.h> |
| |
| /* |
| * compile-time options |
| */ |
| #undef ATA_DEBUG /* debugging output */ |
| #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ |
| #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ |
| #undef ATA_NDEBUG /* define to disable quick runtime checks */ |
| #undef ATA_ENABLE_ATAPI /* define to enable ATAPI support */ |
| #undef ATA_ENABLE_PATA /* define to enable PATA support in some |
| * low-level drivers */ |
| #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */ |
| |
| |
| /* note: prints function name for you */ |
| #ifdef ATA_DEBUG |
| #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
| #ifdef ATA_VERBOSE_DEBUG |
| #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
| #else |
| #define VPRINTK(fmt, args...) |
| #endif /* ATA_VERBOSE_DEBUG */ |
| #else |
| #define DPRINTK(fmt, args...) |
| #define VPRINTK(fmt, args...) |
| #endif /* ATA_DEBUG */ |
| |
| #ifdef ATA_NDEBUG |
| #define assert(expr) |
| #else |
| #define assert(expr) \ |
| if(unlikely(!(expr))) { \ |
| printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ |
| #expr,__FILE__,__FUNCTION__,__LINE__); \ |
| } |
| #endif |
| |
| /* defines only for the constants which don't work well as enums */ |
| #define ATA_TAG_POISON 0xfafbfcfdU |
| |
| /* move to PCI layer? */ |
| static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) |
| { |
| return &pdev->dev; |
| } |
| |
| enum { |
| /* various global constants */ |
| LIBATA_MAX_PRD = ATA_MAX_PRD / 2, |
| ATA_MAX_PORTS = 8, |
| ATA_DEF_QUEUE = 1, |
| ATA_MAX_QUEUE = 1, |
| ATA_MAX_SECTORS = 200, /* FIXME */ |
| ATA_MAX_BUS = 2, |
| ATA_DEF_BUSY_WAIT = 10000, |
| ATA_SHORT_PAUSE = (HZ >> 6) + 1, |
| |
| ATA_SHT_EMULATED = 1, |
| ATA_SHT_CMD_PER_LUN = 1, |
| ATA_SHT_THIS_ID = -1, |
| ATA_SHT_USE_CLUSTERING = 0, |
| |
| /* struct ata_device stuff */ |
| ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ |
| ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ |
| ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */ |
| |
| ATA_DEV_UNKNOWN = 0, /* unknown device */ |
| ATA_DEV_ATA = 1, /* ATA device */ |
| ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ |
| ATA_DEV_ATAPI = 3, /* ATAPI device */ |
| ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ |
| ATA_DEV_NONE = 5, /* no device */ |
| |
| /* struct ata_port flags */ |
| ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ |
| /* (doesn't imply presence) */ |
| ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ |
| ATA_FLAG_SATA = (1 << 3), |
| ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ |
| ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */ |
| ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ |
| ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */ |
| ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ |
| ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once |
| * proper HSM is in place. */ |
| |
| ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ |
| ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ |
| ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ |
| ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, |
| |
| /* various lengths of time */ |
| ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ |
| ATA_TMOUT_PIO = 30 * HZ, |
| ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ |
| ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ |
| ATA_TMOUT_CDB = 30 * HZ, |
| ATA_TMOUT_CDB_QUICK = 5 * HZ, |
| |
| /* ATA bus states */ |
| BUS_UNKNOWN = 0, |
| BUS_DMA = 1, |
| BUS_IDLE = 2, |
| BUS_NOINTR = 3, |
| BUS_NODATA = 4, |
| BUS_TIMER = 5, |
| BUS_PIO = 6, |
| BUS_EDD = 7, |
| BUS_IDENTIFY = 8, |
| BUS_PACKET = 9, |
| |
| /* SATA port states */ |
| PORT_UNKNOWN = 0, |
| PORT_ENABLED = 1, |
| PORT_DISABLED = 2, |
| |
| /* encoding various smaller bitmaps into a single |
| * unsigned long bitmap |
| */ |
| ATA_SHIFT_UDMA = 0, |
| ATA_SHIFT_MWDMA = 8, |
| ATA_SHIFT_PIO = 11, |
| }; |
| |
| enum pio_task_states { |
| PIO_ST_UNKNOWN, |
| PIO_ST_IDLE, |
| PIO_ST_POLL, |
| PIO_ST_TMOUT, |
| PIO_ST, |
| PIO_ST_LAST, |
| PIO_ST_LAST_POLL, |
| PIO_ST_ERR, |
| }; |
| |
| /* forward declarations */ |
| struct scsi_device; |
| struct ata_port_operations; |
| struct ata_port; |
| struct ata_queued_cmd; |
| |
| /* typedefs */ |
| typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat); |
| |
| struct ata_ioports { |
| unsigned long cmd_addr; |
| unsigned long data_addr; |
| unsigned long error_addr; |
| unsigned long feature_addr; |
| unsigned long nsect_addr; |
| unsigned long lbal_addr; |
| unsigned long lbam_addr; |
| unsigned long lbah_addr; |
| unsigned long device_addr; |
| unsigned long status_addr; |
| unsigned long command_addr; |
| unsigned long altstatus_addr; |
| unsigned long ctl_addr; |
| unsigned long bmdma_addr; |
| unsigned long scr_addr; |
| }; |
| |
| struct ata_probe_ent { |
| struct list_head node; |
| struct device *dev; |
| struct ata_port_operations *port_ops; |
| Scsi_Host_Template *sht; |
| struct ata_ioports port[ATA_MAX_PORTS]; |
| unsigned int n_ports; |
| unsigned int hard_port_no; |
| unsigned int pio_mask; |
| unsigned int mwdma_mask; |
| unsigned int udma_mask; |
| unsigned int legacy_mode; |
| unsigned long irq; |
| unsigned int irq_flags; |
| unsigned long host_flags; |
| void __iomem *mmio_base; |
| void *private_data; |
| }; |
| |
| struct ata_host_set { |
| spinlock_t lock; |
| struct device *dev; |
| unsigned long irq; |
| void __iomem *mmio_base; |
| unsigned int n_ports; |
| void *private_data; |
| struct ata_port_operations *ops; |
| struct ata_port * ports[0]; |
| }; |
| |
| struct ata_queued_cmd { |
| struct ata_port *ap; |
| struct ata_device *dev; |
| |
| struct scsi_cmnd *scsicmd; |
| void (*scsidone)(struct scsi_cmnd *); |
| |
| struct ata_taskfile tf; |
| u8 cdb[ATAPI_CDB_LEN]; |
| |
| unsigned long flags; /* ATA_QCFLAG_xxx */ |
| unsigned int tag; |
| unsigned int n_elem; |
| |
| int dma_dir; |
| |
| unsigned int nsect; |
| unsigned int cursect; |
| |
| unsigned int nbytes; |
| unsigned int curbytes; |
| |
| unsigned int cursg; |
| unsigned int cursg_ofs; |
| |
| struct scatterlist sgent; |
| void *buf_virt; |
| |
| struct scatterlist *sg; |
| |
| ata_qc_cb_t complete_fn; |
| |
| struct completion *waiting; |
| |
| void *private_data; |
| }; |
| |
| struct ata_host_stats { |
| unsigned long unhandled_irq; |
| unsigned long idle_irq; |
| unsigned long rw_reqbuf; |
| }; |
| |
| struct ata_device { |
| 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[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ |
| u8 pio_mode; |
| u8 dma_mode; |
| u8 xfer_mode; |
| unsigned int xfer_shift; /* ATA_SHIFT_xxx */ |
| |
| /* cache info about current transfer mode */ |
| u8 xfer_protocol; /* taskfile xfer protocol */ |
| u8 read_cmd; /* opcode to use on read */ |
| u8 write_cmd; /* opcode to use on write */ |
| }; |
| |
| struct ata_port { |
| struct Scsi_Host *host; /* our co-allocated scsi host */ |
| struct ata_port_operations *ops; |
| unsigned long flags; /* ATA_FLAG_xxx */ |
| unsigned int id; /* unique id req'd by scsi midlyr */ |
| unsigned int port_no; /* unique port #; from zero */ |
| unsigned int hard_port_no; /* hardware port #; from zero */ |
| |
| struct ata_prd *prd; /* our SG list */ |
| dma_addr_t prd_dma; /* and its DMA mapping */ |
| |
| struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
| |
| u8 ctl; /* cache of ATA control register */ |
| u8 last_ctl; /* Cache last written value */ |
| unsigned int bus_state; |
| unsigned int port_state; |
| unsigned int pio_mask; |
| unsigned int mwdma_mask; |
| unsigned int udma_mask; |
| unsigned int cbl; /* cable type; ATA_CBL_xxx */ |
| unsigned int cdb_len; |
| |
| struct ata_device device[ATA_MAX_DEVICES]; |
| |
| struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; |
| unsigned long qactive; |
| unsigned int active_tag; |
| |
| struct ata_host_stats stats; |
| struct ata_host_set *host_set; |
| |
| struct work_struct packet_task; |
| |
| struct work_struct pio_task; |
| unsigned int pio_task_state; |
| unsigned long pio_task_timeout; |
| |
| void *private_data; |
| }; |
| |
| struct ata_port_operations { |
| void (*port_disable) (struct ata_port *); |
| |
| void (*dev_config) (struct ata_port *, struct ata_device *); |
| |
| void (*set_piomode) (struct ata_port *, struct ata_device *); |
| void (*set_dmamode) (struct ata_port *, struct ata_device *); |
| |
| void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); |
| void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
| |
| void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); |
| u8 (*check_status)(struct ata_port *ap); |
| u8 (*check_altstatus)(struct ata_port *ap); |
| u8 (*check_err)(struct ata_port *ap); |
| void (*dev_select)(struct ata_port *ap, unsigned int device); |
| |
| void (*phy_reset) (struct ata_port *ap); |
| void (*post_set_mode) (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); |
| |
| void (*qc_prep) (struct ata_queued_cmd *qc); |
| int (*qc_issue) (struct ata_queued_cmd *qc); |
| |
| void (*eng_timeout) (struct ata_port *ap); |
| |
| irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); |
| void (*irq_clear) (struct ata_port *); |
| |
| u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); |
| void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, |
| u32 val); |
| |
| int (*port_start) (struct ata_port *ap); |
| void (*port_stop) (struct ata_port *ap); |
| |
| void (*host_stop) (struct ata_host_set *host_set); |
| |
| void (*bmdma_stop) (struct ata_queued_cmd *qc); |
| u8 (*bmdma_status) (struct ata_port *ap); |
| }; |
| |
| struct ata_port_info { |
| Scsi_Host_Template *sht; |
| unsigned long host_flags; |
| unsigned long pio_mask; |
| unsigned long mwdma_mask; |
| unsigned long udma_mask; |
| struct ata_port_operations *port_ops; |
| }; |
| |
| |
| 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 void ata_port_disable(struct ata_port *); |
| extern void ata_std_ports(struct ata_ioports *ioaddr); |
| #ifdef CONFIG_PCI |
| extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, |
| unsigned int n_ports); |
| extern void ata_pci_remove_one (struct pci_dev *pdev); |
| #endif /* CONFIG_PCI */ |
| extern int ata_device_add(struct ata_probe_ent *ent); |
| extern int ata_scsi_detect(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 int ata_scsi_error(struct Scsi_Host *host); |
| extern int ata_scsi_release(struct Scsi_Host *host); |
| extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
| /* |
| * Default driver ops implementations |
| */ |
| extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); |
| extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
| extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); |
| extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); |
| extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
| extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); |
| extern u8 ata_check_status(struct ata_port *ap); |
| extern u8 ata_altstatus(struct ata_port *ap); |
| extern u8 ata_chk_err(struct ata_port *ap); |
| extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); |
| extern int ata_port_start (struct ata_port *ap); |
| extern void ata_port_stop (struct ata_port *ap); |
| extern void ata_host_stop (struct ata_host_set *host_set); |
| extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
| extern void ata_qc_prep(struct ata_queued_cmd *qc); |
| extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
| extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
| unsigned int buflen); |
| extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| unsigned int n_elem); |
| extern unsigned int ata_dev_classify(struct ata_taskfile *tf); |
| extern void ata_dev_id_string(u16 *id, unsigned char *s, |
| unsigned int ofs, unsigned int len); |
| extern void ata_dev_config(struct ata_port *ap, unsigned int i); |
| extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
| 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, u8 drv_stat); |
| extern void ata_eng_timeout(struct ata_port *ap); |
| extern void ata_scsi_simulate(u16 *id, 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); |
| |
| |
| #ifdef CONFIG_PCI |
| struct pci_bits { |
| unsigned int reg; /* PCI config register to read */ |
| unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ |
| unsigned long mask; |
| unsigned long val; |
| }; |
| |
| extern struct ata_probe_ent * |
| ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); |
| extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); |
| |
| #endif /* CONFIG_PCI */ |
| |
| |
| static inline unsigned int ata_tag_valid(unsigned int tag) |
| { |
| return (tag < ATA_MAX_QUEUE) ? 1 : 0; |
| } |
| |
| static inline unsigned int ata_dev_present(struct ata_device *dev) |
| { |
| return ((dev->class == ATA_DEV_ATA) || |
| (dev->class == ATA_DEV_ATAPI)); |
| } |
| |
| static inline u8 ata_chk_status(struct ata_port *ap) |
| { |
| return ap->ops->check_status(ap); |
| } |
| |
| |
| /** |
| * ata_pause - Flush writes and pause 400 nanoseconds. |
| * @ap: Port to wait for. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| static inline void ata_pause(struct ata_port *ap) |
| { |
| ata_altstatus(ap); |
| ndelay(400); |
| } |
| |
| |
| /** |
| * ata_busy_wait - Wait for a port status register |
| * @ap: Port to wait for. |
| * |
| * Waits up to max*10 microseconds for the selected bits in the port's |
| * status register to be cleared. |
| * Returns final value of status register. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
| unsigned int max) |
| { |
| u8 status; |
| |
| do { |
| udelay(10); |
| status = ata_chk_status(ap); |
| max--; |
| } while ((status & bits) && (max > 0)); |
| |
| return status; |
| } |
| |
| |
| /** |
| * ata_wait_idle - Wait for a port to be idle. |
| * @ap: Port to wait for. |
| * |
| * Waits up to 10ms for port's BUSY and DRQ signals to clear. |
| * Returns final value of status register. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| static inline u8 ata_wait_idle(struct ata_port *ap) |
| { |
| u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); |
| |
| if (status & (ATA_BUSY | ATA_DRQ)) { |
| unsigned long l = ap->ioaddr.status_addr; |
| printk(KERN_WARNING |
| "ATA: abnormal status 0x%X on port 0x%lX\n", |
| status, l); |
| } |
| |
| return status; |
| } |
| |
| 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) |
| { |
| 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) |
| { |
| memset(tf, 0, sizeof(*tf)); |
| |
| tf->ctl = ap->ctl; |
| if (device == 0) |
| tf->device = ATA_DEVICE_OBS; |
| else |
| tf->device = ATA_DEVICE_OBS | ATA_DEV1; |
| } |
| |
| |
| /** |
| * ata_irq_on - Enable interrupts on a port. |
| * @ap: Port on which interrupts are enabled. |
| * |
| * Enable interrupts on a legacy IDE device using MMIO or PIO, |
| * wait for idle, clear any pending interrupts. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| static inline u8 ata_irq_on(struct ata_port *ap) |
| { |
| struct ata_ioports *ioaddr = &ap->ioaddr; |
| u8 tmp; |
| |
| ap->ctl &= ~ATA_NIEN; |
| ap->last_ctl = ap->ctl; |
| |
| if (ap->flags & ATA_FLAG_MMIO) |
| writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| else |
| outb(ap->ctl, ioaddr->ctl_addr); |
| tmp = ata_wait_idle(ap); |
| |
| ap->ops->irq_clear(ap); |
| |
| return tmp; |
| } |
| |
| |
| /** |
| * ata_irq_ack - Acknowledge a device interrupt. |
| * @ap: Port on which interrupts are enabled. |
| * |
| * Wait up to 10 ms for legacy IDE device to become idle (BUSY |
| * or BUSY+DRQ clear). Obtain dma status and port status from |
| * device. Clear the interrupt. Return port status. |
| * |
| * LOCKING: |
| */ |
| |
| static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
| { |
| unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; |
| u8 host_stat, post_stat, status; |
| |
| status = ata_busy_wait(ap, bits, 1000); |
| if (status & bits) |
| DPRINTK("abnormal status 0x%X\n", status); |
| |
| /* get controller status; clear intr, err bits */ |
| if (ap->flags & ATA_FLAG_MMIO) { |
| void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| host_stat = readb(mmio + ATA_DMA_STATUS); |
| writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, |
| mmio + ATA_DMA_STATUS); |
| |
| post_stat = readb(mmio + ATA_DMA_STATUS); |
| } else { |
| host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, |
| ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| |
| post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| } |
| |
| VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", |
| host_stat, post_stat, status); |
| |
| 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(struct ata_device *dev) |
| { |
| return ata_id_wcache_enabled(dev->id) || |
| ata_id_has_flush(dev->id) || |
| ata_id_has_flush_ext(dev->id); |
| } |
| |
| #endif /* __LINUX_LIBATA_H__ */ |