forked from luck/tmp_suning_uos_patched
04351821b4
This splits set_mode into do_set_mode and the wrapper so that a driver can call the standard method inside its own. This in theory also obsoletes ->post_set_mode(). Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Tejun Heo <htejun@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
1236 lines
38 KiB
C
1236 lines
38 KiB
C
/*
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* Copyright 2003-2005 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2005 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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*/
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#ifndef __LINUX_LIBATA_H__
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#define __LINUX_LIBATA_H__
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <asm/scatterlist.h>
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#include <linux/io.h>
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#include <linux/ata.h>
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#include <linux/workqueue.h>
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#include <scsi/scsi_host.h>
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#include <linux/acpi.h>
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/*
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* Define if arch has non-standard setup. This is a _PCI_ standard
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* not a legacy or ISA standard.
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*/
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#ifdef CONFIG_ATA_NONSTANDARD
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#include <asm/libata-portmap.h>
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#else
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#include <asm-generic/libata-portmap.h>
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#endif
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/*
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* compile-time options: to be removed as soon as all the drivers are
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* converted to the new debugging mechanism
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*/
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#undef ATA_DEBUG /* debugging output */
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#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
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#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
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#undef ATA_NDEBUG /* define to disable quick runtime checks */
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/* note: prints function name for you */
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#ifdef ATA_DEBUG
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#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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#ifdef ATA_VERBOSE_DEBUG
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#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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#else
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#define VPRINTK(fmt, args...)
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#endif /* ATA_VERBOSE_DEBUG */
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#else
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#define DPRINTK(fmt, args...)
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#define VPRINTK(fmt, args...)
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#endif /* ATA_DEBUG */
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#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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/* NEW: debug levels */
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#define HAVE_LIBATA_MSG 1
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enum {
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ATA_MSG_DRV = 0x0001,
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ATA_MSG_INFO = 0x0002,
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ATA_MSG_PROBE = 0x0004,
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ATA_MSG_WARN = 0x0008,
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ATA_MSG_MALLOC = 0x0010,
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ATA_MSG_CTL = 0x0020,
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ATA_MSG_INTR = 0x0040,
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ATA_MSG_ERR = 0x0080,
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};
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#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
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#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
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#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
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#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
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#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
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#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
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#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
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#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
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static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
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{
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if (dval < 0 || dval >= (sizeof(u32) * 8))
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return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
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if (!dval)
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return 0;
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return (1 << dval) - 1;
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}
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/* defines only for the constants which don't work well as enums */
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#define ATA_TAG_POISON 0xfafbfcfdU
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/* move to PCI layer? */
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static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
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{
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return &pdev->dev;
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}
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enum {
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/* various global constants */
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LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
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ATA_MAX_PORTS = 8,
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ATA_DEF_QUEUE = 1,
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/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
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ATA_MAX_QUEUE = 32,
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ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
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ATA_MAX_BUS = 2,
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ATA_DEF_BUSY_WAIT = 10000,
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ATA_SHORT_PAUSE = (HZ >> 6) + 1,
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ATA_SHT_EMULATED = 1,
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ATA_SHT_CMD_PER_LUN = 1,
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ATA_SHT_THIS_ID = -1,
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ATA_SHT_USE_CLUSTERING = 1,
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/* struct ata_device stuff */
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ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
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ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
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ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
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ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
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ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
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ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
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ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
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ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
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ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
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ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
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ATA_DFLAG_DETACH = (1 << 16),
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ATA_DFLAG_DETACHED = (1 << 17),
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ATA_DEV_UNKNOWN = 0, /* unknown device */
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ATA_DEV_ATA = 1, /* ATA device */
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ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
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ATA_DEV_ATAPI = 3, /* ATAPI device */
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ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
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ATA_DEV_NONE = 5, /* no device */
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/* struct ata_port flags */
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ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
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/* (doesn't imply presence) */
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ATA_FLAG_SATA = (1 << 1),
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ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
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ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
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ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
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ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
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ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
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ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
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ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
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ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
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* doesn't handle PIO interrupts */
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ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
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ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
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ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
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* Register FIS clearing BSY */
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ATA_FLAG_DEBUGMSG = (1 << 13),
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ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
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ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
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ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
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/* The following flag belongs to ap->pflags but is kept in
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* ap->flags because it's referenced in many LLDs and will be
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* removed in not-too-distant future.
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*/
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ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
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/* bits 24:31 of ap->flags are reserved for LLD specific flags */
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/* struct ata_port pflags */
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ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
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ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
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ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
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ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
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ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
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ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
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ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
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ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
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ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
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ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
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/* struct ata_queued_cmd flags */
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ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
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ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
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ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
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ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
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ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
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ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
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ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
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ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
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ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
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/* host set flags */
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ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
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/* various lengths of time */
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ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
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ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
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ATA_TMOUT_INTERNAL = 30 * HZ,
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ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
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/* ATA bus states */
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BUS_UNKNOWN = 0,
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BUS_DMA = 1,
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BUS_IDLE = 2,
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BUS_NOINTR = 3,
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BUS_NODATA = 4,
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BUS_TIMER = 5,
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BUS_PIO = 6,
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BUS_EDD = 7,
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BUS_IDENTIFY = 8,
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BUS_PACKET = 9,
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/* SATA port states */
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PORT_UNKNOWN = 0,
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PORT_ENABLED = 1,
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PORT_DISABLED = 2,
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/* encoding various smaller bitmaps into a single
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* unsigned int bitmap
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*/
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ATA_BITS_PIO = 7,
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ATA_BITS_MWDMA = 5,
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ATA_BITS_UDMA = 8,
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ATA_SHIFT_PIO = 0,
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ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
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ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
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ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
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ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
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ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
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/* size of buffer to pad xfers ending on unaligned boundaries */
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ATA_DMA_PAD_SZ = 4,
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ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
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/* masks for port functions */
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ATA_PORT_PRIMARY = (1 << 0),
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ATA_PORT_SECONDARY = (1 << 1),
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/* ering size */
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ATA_ERING_SIZE = 32,
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/* desc_len for ata_eh_info and context */
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ATA_EH_DESC_LEN = 80,
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/* reset / recovery action types */
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ATA_EH_REVALIDATE = (1 << 0),
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ATA_EH_SOFTRESET = (1 << 1),
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ATA_EH_HARDRESET = (1 << 2),
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ATA_EH_SUSPEND = (1 << 3),
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ATA_EH_RESUME = (1 << 4),
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ATA_EH_PM_FREEZE = (1 << 5),
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ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
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ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
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ATA_EH_RESUME | ATA_EH_PM_FREEZE,
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/* ata_eh_info->flags */
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ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
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ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
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ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
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ATA_EHI_QUIET = (1 << 3), /* be quiet */
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ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
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ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
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ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
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ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
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ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
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/* max repeat if error condition is still set after ->error_handler */
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ATA_EH_MAX_REPEAT = 5,
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/* how hard are we gonna try to probe/recover devices */
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ATA_PROBE_MAX_TRIES = 3,
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ATA_EH_RESET_TRIES = 3,
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ATA_EH_DEV_TRIES = 3,
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/* Drive spinup time (time from power-on to the first D2H FIS)
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* in msecs - 8s currently. Failing to get ready in this time
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* isn't critical. It will result in reset failure for
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* controllers which can't wait for the first D2H FIS. libata
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* will retry, so it just has to be long enough to spin up
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* most devices.
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*/
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ATA_SPINUP_WAIT = 8000,
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/* Horkage types. May be set by libata or controller on drives
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(some horkage may be drive/controller pair dependant */
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ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
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ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
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ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
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ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
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ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */
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};
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enum hsm_task_states {
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HSM_ST_IDLE, /* no command on going */
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HSM_ST_FIRST, /* (waiting the device to)
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write CDB or first data block */
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HSM_ST, /* (waiting the device to) transfer data */
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HSM_ST_LAST, /* (waiting the device to) complete command */
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HSM_ST_ERR, /* error */
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};
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enum ata_completion_errors {
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AC_ERR_DEV = (1 << 0), /* device reported error */
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AC_ERR_HSM = (1 << 1), /* host state machine violation */
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AC_ERR_TIMEOUT = (1 << 2), /* timeout */
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AC_ERR_MEDIA = (1 << 3), /* media error */
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AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
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AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
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AC_ERR_SYSTEM = (1 << 6), /* system error */
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AC_ERR_INVALID = (1 << 7), /* invalid argument */
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AC_ERR_OTHER = (1 << 8), /* unknown */
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AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
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};
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/* forward declarations */
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struct scsi_device;
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struct ata_port_operations;
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struct ata_port;
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struct ata_queued_cmd;
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/* typedefs */
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typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
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typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
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typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
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typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
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struct ata_ioports {
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void __iomem *cmd_addr;
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void __iomem *data_addr;
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void __iomem *error_addr;
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void __iomem *feature_addr;
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void __iomem *nsect_addr;
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void __iomem *lbal_addr;
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void __iomem *lbam_addr;
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void __iomem *lbah_addr;
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void __iomem *device_addr;
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void __iomem *status_addr;
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void __iomem *command_addr;
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void __iomem *altstatus_addr;
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void __iomem *ctl_addr;
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void __iomem *bmdma_addr;
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void __iomem *scr_addr;
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};
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struct ata_probe_ent {
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struct list_head node;
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struct device *dev;
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const struct ata_port_operations *port_ops;
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struct scsi_host_template *sht;
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struct ata_ioports port[ATA_MAX_PORTS];
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unsigned int n_ports;
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unsigned int dummy_port_mask;
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unsigned int pio_mask;
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unsigned int mwdma_mask;
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unsigned int udma_mask;
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unsigned long irq;
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unsigned long irq2;
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unsigned int irq_flags;
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unsigned long port_flags;
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unsigned long _host_flags;
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void __iomem * const *iomap;
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void *private_data;
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/* port_info for the secondary port. Together with irq2, it's
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* used to implement non-uniform secondary port. Currently,
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* the only user is ata_piix combined mode. This workaround
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* will be removed together with ata_probe_ent when init model
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* is updated.
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*/
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const struct ata_port_info *pinfo2;
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};
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struct ata_host {
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spinlock_t lock;
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struct device *dev;
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unsigned long irq;
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unsigned long irq2;
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void __iomem * const *iomap;
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unsigned int n_ports;
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void *private_data;
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const struct ata_port_operations *ops;
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unsigned long flags;
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struct ata_port *simplex_claimed; /* channel owning the DMA */
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struct ata_port *ports[0];
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};
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struct ata_queued_cmd {
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struct ata_port *ap;
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struct ata_device *dev;
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struct scsi_cmnd *scsicmd;
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void (*scsidone)(struct scsi_cmnd *);
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struct ata_taskfile tf;
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u8 cdb[ATAPI_CDB_LEN];
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unsigned long flags; /* ATA_QCFLAG_xxx */
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unsigned int tag;
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unsigned int n_elem;
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unsigned int orig_n_elem;
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|
int dma_dir;
|
|
|
|
unsigned int pad_len;
|
|
|
|
unsigned int nbytes;
|
|
unsigned int curbytes;
|
|
|
|
unsigned int cursg;
|
|
unsigned int cursg_ofs;
|
|
|
|
struct scatterlist sgent;
|
|
struct scatterlist pad_sgent;
|
|
void *buf_virt;
|
|
|
|
/* DO NOT iterate over __sg manually, use ata_for_each_sg() */
|
|
struct scatterlist *__sg;
|
|
|
|
unsigned int err_mask;
|
|
struct ata_taskfile result_tf;
|
|
ata_qc_cb_t complete_fn;
|
|
|
|
void *private_data;
|
|
};
|
|
|
|
struct ata_port_stats {
|
|
unsigned long unhandled_irq;
|
|
unsigned long idle_irq;
|
|
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;
|
|
unsigned int devno; /* 0 or 1 */
|
|
unsigned long flags; /* ATA_DFLAG_xxx */
|
|
struct scsi_device *sdev; /* attached SCSI device */
|
|
/* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
|
|
u64 n_sectors; /* size of device, if ATA */
|
|
unsigned int class; /* ATA_DEV_xxx */
|
|
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 */
|
|
|
|
unsigned int multi_count; /* sectors count for
|
|
READ/WRITE MULTIPLE */
|
|
unsigned int max_sectors; /* per-device max sectors */
|
|
unsigned int cdb_len;
|
|
|
|
/* per-dev xfer mask */
|
|
unsigned int pio_mask;
|
|
unsigned int mwdma_mask;
|
|
unsigned int udma_mask;
|
|
|
|
/* for CHS addressing */
|
|
u16 cylinders; /* Number of cylinders */
|
|
u16 heads; /* Number of heads */
|
|
u16 sectors; /* Number of sectors per track */
|
|
|
|
/* error history */
|
|
struct ata_ering ering;
|
|
int spdn_cnt;
|
|
unsigned int horkage; /* List of broken features */
|
|
#ifdef CONFIG_SATA_ACPI
|
|
/* ACPI objects info */
|
|
acpi_handle obj_handle;
|
|
#endif
|
|
};
|
|
|
|
/* Offset into struct ata_device. Fields above it are maintained
|
|
* acress device init. Fields below are zeroed.
|
|
*/
|
|
#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
|
|
|
|
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 dev_action[ATA_MAX_DEVICES]; /* dev EH action */
|
|
unsigned int flags; /* ATA_EHI_* flags */
|
|
|
|
unsigned long hotplug_timestamp;
|
|
unsigned int probe_mask;
|
|
|
|
char desc[ATA_EH_DESC_LEN];
|
|
int desc_len;
|
|
};
|
|
|
|
struct ata_eh_context {
|
|
struct ata_eh_info i;
|
|
int tries[ATA_MAX_DEVICES];
|
|
unsigned int classes[ATA_MAX_DEVICES];
|
|
unsigned int did_probe_mask;
|
|
};
|
|
|
|
struct ata_port {
|
|
struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
|
|
const struct ata_port_operations *ops;
|
|
spinlock_t *lock;
|
|
unsigned long flags; /* ATA_FLAG_xxx */
|
|
unsigned int pflags; /* ATA_PFLAG_xxx */
|
|
unsigned int print_id; /* user visible unique port ID */
|
|
unsigned int port_no; /* 0 based port no. inside the host */
|
|
|
|
struct ata_prd *prd; /* our SG list */
|
|
dma_addr_t prd_dma; /* and its DMA mapping */
|
|
|
|
void *pad; /* array of DMA pad buffers */
|
|
dma_addr_t pad_dma;
|
|
|
|
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 pio_mask;
|
|
unsigned int mwdma_mask;
|
|
unsigned int udma_mask;
|
|
unsigned int cbl; /* cable type; ATA_CBL_xxx */
|
|
unsigned int hw_sata_spd_limit;
|
|
unsigned int sata_spd_limit; /* SATA PHY speed limit */
|
|
|
|
/* record runtime error info, protected by host 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];
|
|
unsigned long qc_allocated;
|
|
unsigned int qc_active;
|
|
|
|
unsigned int active_tag;
|
|
u32 sactive;
|
|
|
|
struct ata_port_stats stats;
|
|
struct ata_host *host;
|
|
struct device *dev;
|
|
|
|
void *port_task_data;
|
|
struct delayed_work port_task;
|
|
struct delayed_work hotplug_task;
|
|
struct work_struct scsi_rescan_task;
|
|
|
|
unsigned int hsm_task_state;
|
|
|
|
u32 msg_enable;
|
|
struct list_head eh_done_q;
|
|
wait_queue_head_t eh_wait_q;
|
|
|
|
pm_message_t pm_mesg;
|
|
int *pm_result;
|
|
|
|
void *private_data;
|
|
|
|
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
|
|
};
|
|
|
|
struct ata_port_operations {
|
|
void (*port_disable) (struct ata_port *);
|
|
|
|
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) (const struct ata_port *, struct ata_device *, unsigned long);
|
|
|
|
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);
|
|
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_port *ap, struct ata_device **r_failed_dev);
|
|
|
|
void (*post_set_mode) (struct ata_port *ap);
|
|
|
|
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);
|
|
|
|
void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
|
|
|
|
void (*qc_prep) (struct ata_queued_cmd *qc);
|
|
unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
|
|
|
|
/* 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);
|
|
|
|
irq_handler_t irq_handler;
|
|
void (*irq_clear) (struct ata_port *);
|
|
u8 (*irq_on) (struct ata_port *);
|
|
u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
|
|
|
|
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_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);
|
|
|
|
void (*bmdma_stop) (struct ata_queued_cmd *qc);
|
|
u8 (*bmdma_status) (struct ata_port *ap);
|
|
};
|
|
|
|
struct ata_port_info {
|
|
struct scsi_host_template *sht;
|
|
unsigned long flags;
|
|
unsigned long pio_mask;
|
|
unsigned long mwdma_mask;
|
|
unsigned long udma_mask;
|
|
const struct ata_port_operations *port_ops;
|
|
void *private_data;
|
|
};
|
|
|
|
struct ata_timing {
|
|
unsigned short mode; /* ATA mode */
|
|
unsigned short setup; /* t1 */
|
|
unsigned short act8b; /* t2 for 8-bit I/O */
|
|
unsigned short rec8b; /* t2i for 8-bit I/O */
|
|
unsigned short cyc8b; /* t0 for 8-bit I/O */
|
|
unsigned short active; /* t2 or tD */
|
|
unsigned short recover; /* t2i or tK */
|
|
unsigned short cycle; /* t0 */
|
|
unsigned short udma; /* t2CYCTYP/2 */
|
|
};
|
|
|
|
#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
|
|
|
|
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;
|
|
|
|
static inline const unsigned long *
|
|
sata_ehc_deb_timing(struct ata_eh_context *ehc)
|
|
{
|
|
if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
|
|
return sata_deb_timing_hotplug;
|
|
else
|
|
return sata_deb_timing_normal;
|
|
}
|
|
|
|
static inline int ata_port_is_dummy(struct ata_port *ap)
|
|
{
|
|
return ap->ops == &ata_dummy_port_ops;
|
|
}
|
|
|
|
extern void sata_print_link_status(struct ata_port *ap);
|
|
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 sata_set_spd(struct ata_port *ap);
|
|
extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
|
|
extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
|
|
extern int ata_std_prereset(struct ata_port *ap);
|
|
extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
|
|
extern int sata_port_hardreset(struct ata_port *ap,
|
|
const unsigned long *timing);
|
|
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 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);
|
|
#ifdef CONFIG_PM
|
|
extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
|
|
extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
|
|
extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
|
|
extern int ata_pci_device_resume(struct pci_dev *pdev);
|
|
#endif
|
|
extern int ata_pci_clear_simplex(struct pci_dev *pdev);
|
|
#endif /* CONFIG_PCI */
|
|
extern int ata_device_add(const struct ata_probe_ent *ent);
|
|
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 *);
|
|
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_sas_port_destroy(struct ata_port *);
|
|
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
|
|
struct ata_port_info *, struct Scsi_Host *);
|
|
extern int ata_sas_port_init(struct ata_port *);
|
|
extern int ata_sas_port_start(struct ata_port *ap);
|
|
extern void ata_sas_port_stop(struct ata_port *ap);
|
|
extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
|
|
extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
|
|
struct ata_port *ap);
|
|
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);
|
|
#ifdef CONFIG_PM
|
|
extern int ata_scsi_device_resume(struct scsi_device *);
|
|
extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
|
|
extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
|
|
extern void ata_host_resume(struct ata_host *host);
|
|
#endif
|
|
extern int ata_ratelimit(void);
|
|
extern int ata_busy_sleep(struct ata_port *ap,
|
|
unsigned long timeout_pat, unsigned long timeout);
|
|
extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
|
|
void *data, unsigned long delay);
|
|
extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
|
|
unsigned long interval_msec,
|
|
unsigned long timeout_msec);
|
|
extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
|
|
|
|
/*
|
|
* Default driver ops implementations
|
|
*/
|
|
extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
|
|
extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
|
|
extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
|
|
extern void ata_tf_from_fis(const 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 void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
|
|
extern int ata_port_start (struct ata_port *ap);
|
|
extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
|
|
extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
|
|
unsigned int buflen, int write_data);
|
|
extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
|
|
unsigned int buflen, int write_data);
|
|
extern void ata_qc_prep(struct ata_queued_cmd *qc);
|
|
extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
|
|
extern unsigned 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(const struct ata_taskfile *tf);
|
|
extern void ata_dev_disable(struct ata_device *adev);
|
|
extern void ata_id_string(const u16 *id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len);
|
|
extern void ata_id_c_string(const u16 *id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len);
|
|
extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
|
|
extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
|
|
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_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,
|
|
u8 status, int in_wq);
|
|
extern void ata_qc_complete(struct ata_queued_cmd *qc);
|
|
extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
|
|
void (*finish_qc)(struct ata_queued_cmd *));
|
|
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 void ata_scsi_slave_destroy(struct scsi_device *sdev);
|
|
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
|
|
int queue_depth);
|
|
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
|
|
extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
|
|
extern u8 ata_irq_on(struct ata_port *ap);
|
|
extern u8 ata_dummy_irq_on(struct ata_port *ap);
|
|
extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
|
|
extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
|
|
|
|
extern int ata_cable_40wire(struct ata_port *ap);
|
|
extern int ata_cable_80wire(struct ata_port *ap);
|
|
extern int ata_cable_sata(struct ata_port *ap);
|
|
extern int ata_cable_unknown(struct ata_port *ap);
|
|
|
|
/*
|
|
* Timing helpers
|
|
*/
|
|
|
|
extern unsigned int ata_pio_need_iordy(const struct ata_device *);
|
|
extern int ata_timing_compute(struct ata_device *, unsigned short,
|
|
struct ata_timing *, int, int);
|
|
extern void ata_timing_merge(const struct ata_timing *,
|
|
const struct ata_timing *, struct ata_timing *,
|
|
unsigned int);
|
|
|
|
enum {
|
|
ATA_TIMING_SETUP = (1 << 0),
|
|
ATA_TIMING_ACT8B = (1 << 1),
|
|
ATA_TIMING_REC8B = (1 << 2),
|
|
ATA_TIMING_CYC8B = (1 << 3),
|
|
ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
|
|
ATA_TIMING_CYC8B,
|
|
ATA_TIMING_ACTIVE = (1 << 4),
|
|
ATA_TIMING_RECOVER = (1 << 5),
|
|
ATA_TIMING_CYCLE = (1 << 6),
|
|
ATA_TIMING_UDMA = (1 << 7),
|
|
ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
|
|
ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
|
|
ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
|
|
ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
|
|
};
|
|
|
|
|
|
#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, int portmask);
|
|
extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
|
|
extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
|
|
#endif /* CONFIG_PCI */
|
|
|
|
/*
|
|
* 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_prereset_fn_t prereset,
|
|
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)->print_id , ##args)
|
|
|
|
#define ata_dev_printk(dev, lv, fmt, args...) \
|
|
printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_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)
|
|
|
|
static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
|
|
{
|
|
if (ehi->flags & ATA_EHI_HOTPLUGGED)
|
|
return;
|
|
|
|
ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
|
|
ehi->hotplug_timestamp = jiffies;
|
|
|
|
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_hotplugged(ehi);
|
|
ehi->err_mask |= AC_ERR_ATA_BUS;
|
|
}
|
|
|
|
/*
|
|
* qc helpers
|
|
*/
|
|
static inline int
|
|
ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
|
|
{
|
|
if (sg == &qc->pad_sgent)
|
|
return 1;
|
|
if (qc->pad_len)
|
|
return 0;
|
|
if (((sg - qc->__sg) + 1) == qc->n_elem)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline struct scatterlist *
|
|
ata_qc_first_sg(struct ata_queued_cmd *qc)
|
|
{
|
|
if (qc->n_elem)
|
|
return qc->__sg;
|
|
if (qc->pad_len)
|
|
return &qc->pad_sgent;
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct scatterlist *
|
|
ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
|
|
{
|
|
if (sg == &qc->pad_sgent)
|
|
return NULL;
|
|
if (++sg - qc->__sg < qc->n_elem)
|
|
return sg;
|
|
if (qc->pad_len)
|
|
return &qc->pad_sgent;
|
|
return NULL;
|
|
}
|
|
|
|
#define ata_for_each_sg(sg, qc) \
|
|
for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* device helpers
|
|
*/
|
|
static inline unsigned int ata_class_enabled(unsigned int class)
|
|
{
|
|
return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
|
|
}
|
|
|
|
static inline unsigned int ata_class_disabled(unsigned int class)
|
|
{
|
|
return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
|
|
}
|
|
|
|
static inline unsigned int ata_class_absent(unsigned int class)
|
|
{
|
|
return !ata_class_enabled(class) && !ata_class_disabled(class);
|
|
}
|
|
|
|
static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
|
|
{
|
|
return ata_class_enabled(dev->class);
|
|
}
|
|
|
|
static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
|
|
{
|
|
return ata_class_disabled(dev->class);
|
|
}
|
|
|
|
static inline unsigned int ata_dev_absent(const struct ata_device *dev)
|
|
{
|
|
return ata_class_absent(dev->class);
|
|
}
|
|
|
|
static inline unsigned int ata_dev_ready(const struct ata_device *dev)
|
|
{
|
|
return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
|
|
}
|
|
|
|
/*
|
|
* port helpers
|
|
*/
|
|
static inline int ata_port_max_devices(const struct ata_port *ap)
|
|
{
|
|
if (ap->flags & ATA_FLAG_SLAVE_POSS)
|
|
return 2;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static inline u8 ata_chk_status(struct ata_port *ap)
|
|
{
|
|
return ap->ops->check_status(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_ncq_enabled - Test whether NCQ is enabled
|
|
* @dev: ATA device to test for
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*
|
|
* RETURNS:
|
|
* 1 if NCQ is enabled for @dev, 0 otherwise.
|
|
*/
|
|
static inline int ata_ncq_enabled(struct ata_device *dev)
|
|
{
|
|
return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
|
|
ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
* @bits: bits that must be clear
|
|
* @max: number of 10uS waits to perform
|
|
*
|
|
* 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 != 0xff && (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 != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
|
|
if (ata_msg_warn(ap))
|
|
printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
|
|
status, ap->ioaddr.status_addr);
|
|
}
|
|
|
|
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 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 = dev->ap->ctl;
|
|
if (dev->devno == 0)
|
|
tf->device = ATA_DEVICE_OBS;
|
|
else
|
|
tf->device = ATA_DEVICE_OBS | ATA_DEV1;
|
|
}
|
|
|
|
static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
|
|
{
|
|
qc->dma_dir = DMA_NONE;
|
|
qc->__sg = NULL;
|
|
qc->flags = 0;
|
|
qc->cursg = qc->cursg_ofs = 0;
|
|
qc->nbytes = qc->curbytes = 0;
|
|
qc->n_elem = 0;
|
|
qc->err_mask = 0;
|
|
qc->pad_len = 0;
|
|
|
|
ata_tf_init(qc->dev, &qc->tf);
|
|
|
|
/* init result_tf such that it indicates normal completion */
|
|
qc->result_tf.command = ATA_DRDY;
|
|
qc->result_tf.feature = 0;
|
|
}
|
|
|
|
static inline int ata_try_flush_cache(const struct ata_device *dev)
|
|
{
|
|
return ata_id_wcache_enabled(dev->id) ||
|
|
ata_id_has_flush(dev->id) ||
|
|
ata_id_has_flush_ext(dev->id);
|
|
}
|
|
|
|
static inline unsigned int ac_err_mask(u8 status)
|
|
{
|
|
if (status & (ATA_BUSY | ATA_DRQ))
|
|
return AC_ERR_HSM;
|
|
if (status & (ATA_ERR | ATA_DF))
|
|
return AC_ERR_DEV;
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int __ac_err_mask(u8 status)
|
|
{
|
|
unsigned int mask = ac_err_mask(status);
|
|
if (mask == 0)
|
|
return AC_ERR_OTHER;
|
|
return mask;
|
|
}
|
|
|
|
static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
|
|
{
|
|
ap->pad_dma = 0;
|
|
ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
|
|
&ap->pad_dma, GFP_KERNEL);
|
|
return (ap->pad == NULL) ? -ENOMEM : 0;
|
|
}
|
|
|
|
static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
|
|
{
|
|
dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
|
|
}
|
|
|
|
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
|
|
{
|
|
return (struct ata_port *) &host->hostdata[0];
|
|
}
|
|
|
|
#endif /* __LINUX_LIBATA_H__ */
|