1529 строки
39 KiB
C
1529 строки
39 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SATA specific part of ATA helper library
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*
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2004 Jeff Garzik
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* Copyright 2006 Tejun Heo <htejun@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <linux/libata.h>
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#include <asm/unaligned.h>
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#include "libata.h"
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#include "libata-transport.h"
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/* debounce timing parameters in msecs { interval, duration, timeout } */
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const unsigned int sata_deb_timing_normal[] = { 5, 100, 2000 };
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EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
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const unsigned int sata_deb_timing_hotplug[] = { 25, 500, 2000 };
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EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
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const unsigned int sata_deb_timing_long[] = { 100, 2000, 5000 };
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EXPORT_SYMBOL_GPL(sata_deb_timing_long);
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/**
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* sata_scr_valid - test whether SCRs are accessible
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* @link: ATA link to test SCR accessibility for
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*
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* Test whether SCRs are accessible for @link.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* 1 if SCRs are accessible, 0 otherwise.
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*/
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int sata_scr_valid(struct ata_link *link)
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{
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struct ata_port *ap = link->ap;
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return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
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}
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EXPORT_SYMBOL_GPL(sata_scr_valid);
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/**
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* sata_scr_read - read SCR register of the specified port
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* @link: ATA link to read SCR for
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* @reg: SCR to read
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* @val: Place to store read value
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*
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* Read SCR register @reg of @link into *@val. This function is
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* guaranteed to succeed if @link is ap->link, the cable type of
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* the port is SATA and the port implements ->scr_read.
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*
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* LOCKING:
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* None if @link is ap->link. Kernel thread context otherwise.
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*
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* RETURNS:
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* 0 on success, negative errno on failure.
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*/
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int sata_scr_read(struct ata_link *link, int reg, u32 *val)
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{
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if (ata_is_host_link(link)) {
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if (sata_scr_valid(link))
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return link->ap->ops->scr_read(link, reg, val);
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return -EOPNOTSUPP;
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}
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return sata_pmp_scr_read(link, reg, val);
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}
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EXPORT_SYMBOL_GPL(sata_scr_read);
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/**
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* sata_scr_write - write SCR register of the specified port
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* @link: ATA link to write SCR for
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* @reg: SCR to write
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* @val: value to write
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*
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* Write @val to SCR register @reg of @link. This function is
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* guaranteed to succeed if @link is ap->link, the cable type of
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* the port is SATA and the port implements ->scr_read.
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*
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* LOCKING:
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* None if @link is ap->link. Kernel thread context otherwise.
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*
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* RETURNS:
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* 0 on success, negative errno on failure.
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*/
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int sata_scr_write(struct ata_link *link, int reg, u32 val)
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{
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if (ata_is_host_link(link)) {
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if (sata_scr_valid(link))
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return link->ap->ops->scr_write(link, reg, val);
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return -EOPNOTSUPP;
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}
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return sata_pmp_scr_write(link, reg, val);
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}
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EXPORT_SYMBOL_GPL(sata_scr_write);
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/**
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* sata_scr_write_flush - write SCR register of the specified port and flush
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* @link: ATA link to write SCR for
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* @reg: SCR to write
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* @val: value to write
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*
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* This function is identical to sata_scr_write() except that this
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* function performs flush after writing to the register.
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*
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* LOCKING:
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* None if @link is ap->link. Kernel thread context otherwise.
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*
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* RETURNS:
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* 0 on success, negative errno on failure.
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*/
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int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
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{
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if (ata_is_host_link(link)) {
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int rc;
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if (sata_scr_valid(link)) {
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rc = link->ap->ops->scr_write(link, reg, val);
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if (rc == 0)
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rc = link->ap->ops->scr_read(link, reg, &val);
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return rc;
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}
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return -EOPNOTSUPP;
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}
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return sata_pmp_scr_write(link, reg, val);
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}
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EXPORT_SYMBOL_GPL(sata_scr_write_flush);
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/**
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* ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
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* @tf: Taskfile to convert
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* @pmp: Port multiplier port
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* @is_cmd: This FIS is for command
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* @fis: Buffer into which data will output
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*
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* Converts a standard ATA taskfile to a Serial ATA
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* FIS structure (Register - Host to Device).
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*
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* LOCKING:
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* Inherited from caller.
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*/
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void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
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{
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fis[0] = 0x27; /* Register - Host to Device FIS */
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fis[1] = pmp & 0xf; /* Port multiplier number*/
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if (is_cmd)
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fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
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fis[2] = tf->command;
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fis[3] = tf->feature;
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fis[4] = tf->lbal;
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fis[5] = tf->lbam;
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fis[6] = tf->lbah;
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fis[7] = tf->device;
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fis[8] = tf->hob_lbal;
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fis[9] = tf->hob_lbam;
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fis[10] = tf->hob_lbah;
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fis[11] = tf->hob_feature;
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fis[12] = tf->nsect;
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fis[13] = tf->hob_nsect;
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fis[14] = 0;
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fis[15] = tf->ctl;
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fis[16] = tf->auxiliary & 0xff;
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fis[17] = (tf->auxiliary >> 8) & 0xff;
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fis[18] = (tf->auxiliary >> 16) & 0xff;
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fis[19] = (tf->auxiliary >> 24) & 0xff;
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}
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EXPORT_SYMBOL_GPL(ata_tf_to_fis);
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/**
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* ata_tf_from_fis - Convert SATA FIS to ATA taskfile
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* @fis: Buffer from which data will be input
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* @tf: Taskfile to output
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*
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* Converts a serial ATA FIS structure to a standard ATA taskfile.
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*
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* LOCKING:
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* Inherited from caller.
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*/
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void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
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{
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tf->status = fis[2];
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tf->error = fis[3];
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tf->lbal = fis[4];
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tf->lbam = fis[5];
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tf->lbah = fis[6];
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tf->device = fis[7];
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tf->hob_lbal = fis[8];
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tf->hob_lbam = fis[9];
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tf->hob_lbah = fis[10];
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tf->nsect = fis[12];
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tf->hob_nsect = fis[13];
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}
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EXPORT_SYMBOL_GPL(ata_tf_from_fis);
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/**
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* sata_link_debounce - debounce SATA phy status
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* @link: ATA link to debounce SATA phy status for
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* @params: timing parameters { interval, duration, timeout } in msec
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* @deadline: deadline jiffies for the operation
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*
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* Make sure SStatus of @link reaches stable state, determined by
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* holding the same value where DET is not 1 for @duration polled
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* every @interval, before @timeout. Timeout constraints the
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* beginning of the stable state. Because DET gets stuck at 1 on
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* some controllers after hot unplugging, this functions waits
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* until timeout then returns 0 if DET is stable at 1.
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*
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* @timeout is further limited by @deadline. The sooner of the
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* two is used.
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*
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* LOCKING:
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* Kernel thread context (may sleep)
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*
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* RETURNS:
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* 0 on success, -errno on failure.
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*/
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int sata_link_debounce(struct ata_link *link, const unsigned int *params,
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unsigned long deadline)
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{
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unsigned int interval = params[0];
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unsigned int duration = params[1];
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unsigned long last_jiffies, t;
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u32 last, cur;
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int rc;
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t = ata_deadline(jiffies, params[2]);
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if (time_before(t, deadline))
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deadline = t;
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if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
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return rc;
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cur &= 0xf;
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last = cur;
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last_jiffies = jiffies;
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while (1) {
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ata_msleep(link->ap, interval);
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if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
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return rc;
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cur &= 0xf;
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/* DET stable? */
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if (cur == last) {
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if (cur == 1 && time_before(jiffies, deadline))
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continue;
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if (time_after(jiffies,
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ata_deadline(last_jiffies, duration)))
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return 0;
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continue;
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}
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/* unstable, start over */
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last = cur;
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last_jiffies = jiffies;
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/* Check deadline. If debouncing failed, return
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* -EPIPE to tell upper layer to lower link speed.
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*/
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if (time_after(jiffies, deadline))
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return -EPIPE;
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}
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}
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EXPORT_SYMBOL_GPL(sata_link_debounce);
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/**
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* sata_link_resume - resume SATA link
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* @link: ATA link to resume SATA
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* @params: timing parameters { interval, duration, timeout } in msec
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* @deadline: deadline jiffies for the operation
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*
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* Resume SATA phy @link and debounce it.
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*
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* LOCKING:
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* Kernel thread context (may sleep)
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*
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* RETURNS:
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* 0 on success, -errno on failure.
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*/
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int sata_link_resume(struct ata_link *link, const unsigned int *params,
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unsigned long deadline)
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{
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int tries = ATA_LINK_RESUME_TRIES;
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u32 scontrol, serror;
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int rc;
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if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
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return rc;
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/*
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* Writes to SControl sometimes get ignored under certain
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* controllers (ata_piix SIDPR). Make sure DET actually is
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* cleared.
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*/
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do {
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scontrol = (scontrol & 0x0f0) | 0x300;
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if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
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return rc;
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/*
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* Some PHYs react badly if SStatus is pounded
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* immediately after resuming. Delay 200ms before
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* debouncing.
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*/
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if (!(link->flags & ATA_LFLAG_NO_DEBOUNCE_DELAY))
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ata_msleep(link->ap, 200);
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/* is SControl restored correctly? */
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if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
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return rc;
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} while ((scontrol & 0xf0f) != 0x300 && --tries);
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if ((scontrol & 0xf0f) != 0x300) {
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ata_link_warn(link, "failed to resume link (SControl %X)\n",
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scontrol);
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return 0;
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}
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if (tries < ATA_LINK_RESUME_TRIES)
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ata_link_warn(link, "link resume succeeded after %d retries\n",
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ATA_LINK_RESUME_TRIES - tries);
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if ((rc = sata_link_debounce(link, params, deadline)))
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return rc;
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/* clear SError, some PHYs require this even for SRST to work */
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if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
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rc = sata_scr_write(link, SCR_ERROR, serror);
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return rc != -EINVAL ? rc : 0;
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}
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EXPORT_SYMBOL_GPL(sata_link_resume);
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/**
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* sata_link_scr_lpm - manipulate SControl IPM and SPM fields
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* @link: ATA link to manipulate SControl for
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* @policy: LPM policy to configure
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* @spm_wakeup: initiate LPM transition to active state
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*
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* Manipulate the IPM field of the SControl register of @link
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* according to @policy. If @policy is ATA_LPM_MAX_POWER and
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* @spm_wakeup is %true, the SPM field is manipulated to wake up
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* the link. This function also clears PHYRDY_CHG before
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* returning.
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*
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* LOCKING:
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* EH context.
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*
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* RETURNS:
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* 0 on success, -errno otherwise.
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*/
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int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
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bool spm_wakeup)
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{
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struct ata_eh_context *ehc = &link->eh_context;
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bool woken_up = false;
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u32 scontrol;
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int rc;
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rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
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if (rc)
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return rc;
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switch (policy) {
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case ATA_LPM_MAX_POWER:
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/* disable all LPM transitions */
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scontrol |= (0x7 << 8);
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/* initiate transition to active state */
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if (spm_wakeup) {
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scontrol |= (0x4 << 12);
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woken_up = true;
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}
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break;
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case ATA_LPM_MED_POWER:
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/* allow LPM to PARTIAL */
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scontrol &= ~(0x1 << 8);
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scontrol |= (0x6 << 8);
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break;
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case ATA_LPM_MED_POWER_WITH_DIPM:
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case ATA_LPM_MIN_POWER_WITH_PARTIAL:
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case ATA_LPM_MIN_POWER:
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if (ata_link_nr_enabled(link) > 0)
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/* no restrictions on LPM transitions */
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scontrol &= ~(0x7 << 8);
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else {
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/* empty port, power off */
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scontrol &= ~0xf;
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scontrol |= (0x1 << 2);
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}
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break;
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default:
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WARN_ON(1);
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}
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rc = sata_scr_write(link, SCR_CONTROL, scontrol);
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if (rc)
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return rc;
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/* give the link time to transit out of LPM state */
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if (woken_up)
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msleep(10);
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/* clear PHYRDY_CHG from SError */
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ehc->i.serror &= ~SERR_PHYRDY_CHG;
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return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
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}
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EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
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static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
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{
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struct ata_link *host_link = &link->ap->link;
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u32 limit, target, spd;
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limit = link->sata_spd_limit;
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/* Don't configure downstream link faster than upstream link.
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* It doesn't speed up anything and some PMPs choke on such
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* configuration.
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*/
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if (!ata_is_host_link(link) && host_link->sata_spd)
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limit &= (1 << host_link->sata_spd) - 1;
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if (limit == UINT_MAX)
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target = 0;
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else
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target = fls(limit);
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spd = (*scontrol >> 4) & 0xf;
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*scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
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return spd != target;
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}
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/**
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* sata_set_spd_needed - is SATA spd configuration needed
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* @link: Link in question
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*
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* Test whether the spd limit in SControl matches
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* @link->sata_spd_limit. This function is used to determine
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* whether hardreset is necessary to apply SATA spd
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* configuration.
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*
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* LOCKING:
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* Inherited from caller.
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*
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* RETURNS:
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* 1 if SATA spd configuration is needed, 0 otherwise.
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*/
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static int sata_set_spd_needed(struct ata_link *link)
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{
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u32 scontrol;
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if (sata_scr_read(link, SCR_CONTROL, &scontrol))
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return 1;
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return __sata_set_spd_needed(link, &scontrol);
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}
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/**
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* sata_set_spd - set SATA spd according to spd limit
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* @link: Link to set SATA spd for
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*
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* Set SATA spd of @link according to sata_spd_limit.
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*
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* LOCKING:
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* Inherited from caller.
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*
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* RETURNS:
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* 0 if spd doesn't need to be changed, 1 if spd has been
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* changed. Negative errno if SCR registers are inaccessible.
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*/
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int sata_set_spd(struct ata_link *link)
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{
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u32 scontrol;
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int rc;
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if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
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return rc;
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if (!__sata_set_spd_needed(link, &scontrol))
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return 0;
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if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
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return rc;
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return 1;
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}
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EXPORT_SYMBOL_GPL(sata_set_spd);
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/**
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* sata_link_hardreset - reset link via SATA phy reset
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* @link: link to reset
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* @timing: timing parameters { interval, duration, timeout } in msec
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* @deadline: deadline jiffies for the operation
|
|
* @online: optional out parameter indicating link onlineness
|
|
* @check_ready: optional callback to check link readiness
|
|
*
|
|
* SATA phy-reset @link using DET bits of SControl register.
|
|
* After hardreset, link readiness is waited upon using
|
|
* ata_wait_ready() if @check_ready is specified. LLDs are
|
|
* allowed to not specify @check_ready and wait itself after this
|
|
* function returns. Device classification is LLD's
|
|
* responsibility.
|
|
*
|
|
* *@online is set to one iff reset succeeded and @link is online
|
|
* after reset.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
int sata_link_hardreset(struct ata_link *link, const unsigned int *timing,
|
|
unsigned long deadline,
|
|
bool *online, int (*check_ready)(struct ata_link *))
|
|
{
|
|
u32 scontrol;
|
|
int rc;
|
|
|
|
if (online)
|
|
*online = false;
|
|
|
|
if (sata_set_spd_needed(link)) {
|
|
/* SATA spec says nothing about how to reconfigure
|
|
* spd. To be on the safe side, turn off phy during
|
|
* reconfiguration. This works for at least ICH7 AHCI
|
|
* and Sil3124.
|
|
*/
|
|
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
|
|
goto out;
|
|
|
|
scontrol = (scontrol & 0x0f0) | 0x304;
|
|
|
|
if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
|
|
goto out;
|
|
|
|
sata_set_spd(link);
|
|
}
|
|
|
|
/* issue phy wake/reset */
|
|
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
|
|
goto out;
|
|
|
|
scontrol = (scontrol & 0x0f0) | 0x301;
|
|
|
|
if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
|
|
goto out;
|
|
|
|
/* Couldn't find anything in SATA I/II specs, but AHCI-1.1
|
|
* 10.4.2 says at least 1 ms.
|
|
*/
|
|
ata_msleep(link->ap, 1);
|
|
|
|
/* bring link back */
|
|
rc = sata_link_resume(link, timing, deadline);
|
|
if (rc)
|
|
goto out;
|
|
/* if link is offline nothing more to do */
|
|
if (ata_phys_link_offline(link))
|
|
goto out;
|
|
|
|
/* Link is online. From this point, -ENODEV too is an error. */
|
|
if (online)
|
|
*online = true;
|
|
|
|
if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
|
|
/* If PMP is supported, we have to do follow-up SRST.
|
|
* Some PMPs don't send D2H Reg FIS after hardreset if
|
|
* the first port is empty. Wait only for
|
|
* ATA_TMOUT_PMP_SRST_WAIT.
|
|
*/
|
|
if (check_ready) {
|
|
unsigned long pmp_deadline;
|
|
|
|
pmp_deadline = ata_deadline(jiffies,
|
|
ATA_TMOUT_PMP_SRST_WAIT);
|
|
if (time_after(pmp_deadline, deadline))
|
|
pmp_deadline = deadline;
|
|
ata_wait_ready(link, pmp_deadline, check_ready);
|
|
}
|
|
rc = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
rc = 0;
|
|
if (check_ready)
|
|
rc = ata_wait_ready(link, deadline, check_ready);
|
|
out:
|
|
if (rc && rc != -EAGAIN) {
|
|
/* online is set iff link is online && reset succeeded */
|
|
if (online)
|
|
*online = false;
|
|
ata_link_err(link, "COMRESET failed (errno=%d)\n", rc);
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sata_link_hardreset);
|
|
|
|
/**
|
|
* ata_qc_complete_multiple - Complete multiple qcs successfully
|
|
* @ap: port in question
|
|
* @qc_active: new qc_active mask
|
|
*
|
|
* Complete in-flight commands. This functions is meant to be
|
|
* called from low-level driver's interrupt routine to complete
|
|
* requests normally. ap->qc_active and @qc_active is compared
|
|
* and commands are completed accordingly.
|
|
*
|
|
* Always use this function when completing multiple NCQ commands
|
|
* from IRQ handlers instead of calling ata_qc_complete()
|
|
* multiple times to keep IRQ expect status properly in sync.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*
|
|
* RETURNS:
|
|
* Number of completed commands on success, -errno otherwise.
|
|
*/
|
|
int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active)
|
|
{
|
|
u64 done_mask, ap_qc_active = ap->qc_active;
|
|
int nr_done = 0;
|
|
|
|
/*
|
|
* If the internal tag is set on ap->qc_active, then we care about
|
|
* bit0 on the passed in qc_active mask. Move that bit up to match
|
|
* the internal tag.
|
|
*/
|
|
if (ap_qc_active & (1ULL << ATA_TAG_INTERNAL)) {
|
|
qc_active |= (qc_active & 0x01) << ATA_TAG_INTERNAL;
|
|
qc_active ^= qc_active & 0x01;
|
|
}
|
|
|
|
done_mask = ap_qc_active ^ qc_active;
|
|
|
|
if (unlikely(done_mask & qc_active)) {
|
|
ata_port_err(ap, "illegal qc_active transition (%08llx->%08llx)\n",
|
|
ap->qc_active, qc_active);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ap->ops->qc_ncq_fill_rtf)
|
|
ap->ops->qc_ncq_fill_rtf(ap, done_mask);
|
|
|
|
while (done_mask) {
|
|
struct ata_queued_cmd *qc;
|
|
unsigned int tag = __ffs64(done_mask);
|
|
|
|
qc = ata_qc_from_tag(ap, tag);
|
|
if (qc) {
|
|
ata_qc_complete(qc);
|
|
nr_done++;
|
|
}
|
|
done_mask &= ~(1ULL << tag);
|
|
}
|
|
|
|
return nr_done;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
|
|
|
|
/**
|
|
* ata_slave_link_init - initialize slave link
|
|
* @ap: port to initialize slave link for
|
|
*
|
|
* Create and initialize slave link for @ap. This enables slave
|
|
* link handling on the port.
|
|
*
|
|
* In libata, a port contains links and a link contains devices.
|
|
* There is single host link but if a PMP is attached to it,
|
|
* there can be multiple fan-out links. On SATA, there's usually
|
|
* a single device connected to a link but PATA and SATA
|
|
* controllers emulating TF based interface can have two - master
|
|
* and slave.
|
|
*
|
|
* However, there are a few controllers which don't fit into this
|
|
* abstraction too well - SATA controllers which emulate TF
|
|
* interface with both master and slave devices but also have
|
|
* separate SCR register sets for each device. These controllers
|
|
* need separate links for physical link handling
|
|
* (e.g. onlineness, link speed) but should be treated like a
|
|
* traditional M/S controller for everything else (e.g. command
|
|
* issue, softreset).
|
|
*
|
|
* slave_link is libata's way of handling this class of
|
|
* controllers without impacting core layer too much. For
|
|
* anything other than physical link handling, the default host
|
|
* link is used for both master and slave. For physical link
|
|
* handling, separate @ap->slave_link is used. All dirty details
|
|
* are implemented inside libata core layer. From LLD's POV, the
|
|
* only difference is that prereset, hardreset and postreset are
|
|
* called once more for the slave link, so the reset sequence
|
|
* looks like the following.
|
|
*
|
|
* prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
|
|
* softreset(M) -> postreset(M) -> postreset(S)
|
|
*
|
|
* Note that softreset is called only for the master. Softreset
|
|
* resets both M/S by definition, so SRST on master should handle
|
|
* both (the standard method will work just fine).
|
|
*
|
|
* LOCKING:
|
|
* Should be called before host is registered.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno on failure.
|
|
*/
|
|
int ata_slave_link_init(struct ata_port *ap)
|
|
{
|
|
struct ata_link *link;
|
|
|
|
WARN_ON(ap->slave_link);
|
|
WARN_ON(ap->flags & ATA_FLAG_PMP);
|
|
|
|
link = kzalloc(sizeof(*link), GFP_KERNEL);
|
|
if (!link)
|
|
return -ENOMEM;
|
|
|
|
ata_link_init(ap, link, 1);
|
|
ap->slave_link = link;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_slave_link_init);
|
|
|
|
/**
|
|
* sata_lpm_ignore_phy_events - test if PHY event should be ignored
|
|
* @link: Link receiving the event
|
|
*
|
|
* Test whether the received PHY event has to be ignored or not.
|
|
*
|
|
* LOCKING:
|
|
* None:
|
|
*
|
|
* RETURNS:
|
|
* True if the event has to be ignored.
|
|
*/
|
|
bool sata_lpm_ignore_phy_events(struct ata_link *link)
|
|
{
|
|
unsigned long lpm_timeout = link->last_lpm_change +
|
|
msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
|
|
|
|
/* if LPM is enabled, PHYRDY doesn't mean anything */
|
|
if (link->lpm_policy > ATA_LPM_MAX_POWER)
|
|
return true;
|
|
|
|
/* ignore the first PHY event after the LPM policy changed
|
|
* as it is might be spurious
|
|
*/
|
|
if ((link->flags & ATA_LFLAG_CHANGED) &&
|
|
time_before(jiffies, lpm_timeout))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events);
|
|
|
|
static const char *ata_lpm_policy_names[] = {
|
|
[ATA_LPM_UNKNOWN] = "max_performance",
|
|
[ATA_LPM_MAX_POWER] = "max_performance",
|
|
[ATA_LPM_MED_POWER] = "medium_power",
|
|
[ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
|
|
[ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
|
|
[ATA_LPM_MIN_POWER] = "min_power",
|
|
};
|
|
|
|
static ssize_t ata_scsi_lpm_store(struct device *device,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(device);
|
|
struct ata_port *ap = ata_shost_to_port(shost);
|
|
struct ata_link *link;
|
|
struct ata_device *dev;
|
|
enum ata_lpm_policy policy;
|
|
unsigned long flags;
|
|
|
|
/* UNKNOWN is internal state, iterate from MAX_POWER */
|
|
for (policy = ATA_LPM_MAX_POWER;
|
|
policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
|
|
const char *name = ata_lpm_policy_names[policy];
|
|
|
|
if (strncmp(name, buf, strlen(name)) == 0)
|
|
break;
|
|
}
|
|
if (policy == ARRAY_SIZE(ata_lpm_policy_names))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(ap->lock, flags);
|
|
|
|
ata_for_each_link(link, ap, EDGE) {
|
|
ata_for_each_dev(dev, &ap->link, ENABLED) {
|
|
if (dev->horkage & ATA_HORKAGE_NOLPM) {
|
|
count = -EOPNOTSUPP;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
}
|
|
|
|
ap->target_lpm_policy = policy;
|
|
ata_port_schedule_eh(ap);
|
|
out_unlock:
|
|
spin_unlock_irqrestore(ap->lock, flags);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t ata_scsi_lpm_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct ata_port *ap = ata_shost_to_port(shost);
|
|
|
|
if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
|
|
return -EINVAL;
|
|
|
|
return sysfs_emit(buf, "%s\n",
|
|
ata_lpm_policy_names[ap->target_lpm_policy]);
|
|
}
|
|
DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
|
|
ata_scsi_lpm_show, ata_scsi_lpm_store);
|
|
EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
|
|
|
|
static ssize_t ata_ncq_prio_supported_show(struct device *device,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(device);
|
|
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
|
struct ata_device *dev;
|
|
bool ncq_prio_supported;
|
|
int rc = 0;
|
|
|
|
spin_lock_irq(ap->lock);
|
|
dev = ata_scsi_find_dev(ap, sdev);
|
|
if (!dev)
|
|
rc = -ENODEV;
|
|
else
|
|
ncq_prio_supported = dev->flags & ATA_DFLAG_NCQ_PRIO;
|
|
spin_unlock_irq(ap->lock);
|
|
|
|
return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_supported);
|
|
}
|
|
|
|
DEVICE_ATTR(ncq_prio_supported, S_IRUGO, ata_ncq_prio_supported_show, NULL);
|
|
EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_supported);
|
|
|
|
static ssize_t ata_ncq_prio_enable_show(struct device *device,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(device);
|
|
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
|
struct ata_device *dev;
|
|
bool ncq_prio_enable;
|
|
int rc = 0;
|
|
|
|
spin_lock_irq(ap->lock);
|
|
dev = ata_scsi_find_dev(ap, sdev);
|
|
if (!dev)
|
|
rc = -ENODEV;
|
|
else
|
|
ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED;
|
|
spin_unlock_irq(ap->lock);
|
|
|
|
return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_enable);
|
|
}
|
|
|
|
static ssize_t ata_ncq_prio_enable_store(struct device *device,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(device);
|
|
struct ata_port *ap;
|
|
struct ata_device *dev;
|
|
long int input;
|
|
int rc = 0;
|
|
|
|
rc = kstrtol(buf, 10, &input);
|
|
if (rc)
|
|
return rc;
|
|
if ((input < 0) || (input > 1))
|
|
return -EINVAL;
|
|
|
|
ap = ata_shost_to_port(sdev->host);
|
|
dev = ata_scsi_find_dev(ap, sdev);
|
|
if (unlikely(!dev))
|
|
return -ENODEV;
|
|
|
|
spin_lock_irq(ap->lock);
|
|
|
|
if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
|
|
rc = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
if (input) {
|
|
if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
|
|
ata_dev_err(dev,
|
|
"CDL must be disabled to enable NCQ priority\n");
|
|
rc = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLED;
|
|
} else {
|
|
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock_irq(ap->lock);
|
|
|
|
return rc ? rc : len;
|
|
}
|
|
|
|
DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
|
|
ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
|
|
EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
|
|
|
|
static struct attribute *ata_ncq_sdev_attrs[] = {
|
|
&dev_attr_unload_heads.attr,
|
|
&dev_attr_ncq_prio_enable.attr,
|
|
&dev_attr_ncq_prio_supported.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group ata_ncq_sdev_attr_group = {
|
|
.attrs = ata_ncq_sdev_attrs
|
|
};
|
|
|
|
const struct attribute_group *ata_ncq_sdev_groups[] = {
|
|
&ata_ncq_sdev_attr_group,
|
|
NULL
|
|
};
|
|
EXPORT_SYMBOL_GPL(ata_ncq_sdev_groups);
|
|
|
|
static ssize_t
|
|
ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct ata_port *ap = ata_shost_to_port(shost);
|
|
if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
|
|
return ap->ops->em_store(ap, buf, count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t
|
|
ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct ata_port *ap = ata_shost_to_port(shost);
|
|
|
|
if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
|
|
return ap->ops->em_show(ap, buf);
|
|
return -EINVAL;
|
|
}
|
|
DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
|
|
ata_scsi_em_message_show, ata_scsi_em_message_store);
|
|
EXPORT_SYMBOL_GPL(dev_attr_em_message);
|
|
|
|
static ssize_t
|
|
ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct Scsi_Host *shost = class_to_shost(dev);
|
|
struct ata_port *ap = ata_shost_to_port(shost);
|
|
|
|
return sysfs_emit(buf, "%d\n", ap->em_message_type);
|
|
}
|
|
DEVICE_ATTR(em_message_type, S_IRUGO,
|
|
ata_scsi_em_message_type_show, NULL);
|
|
EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
|
|
|
|
static ssize_t
|
|
ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
|
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
|
|
|
|
if (atadev && ap->ops->sw_activity_show &&
|
|
(ap->flags & ATA_FLAG_SW_ACTIVITY))
|
|
return ap->ops->sw_activity_show(atadev, buf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t
|
|
ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
|
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
|
|
enum sw_activity val;
|
|
int rc;
|
|
|
|
if (atadev && ap->ops->sw_activity_store &&
|
|
(ap->flags & ATA_FLAG_SW_ACTIVITY)) {
|
|
val = simple_strtoul(buf, NULL, 0);
|
|
switch (val) {
|
|
case OFF: case BLINK_ON: case BLINK_OFF:
|
|
rc = ap->ops->sw_activity_store(atadev, val);
|
|
if (!rc)
|
|
return count;
|
|
else
|
|
return rc;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
|
|
ata_scsi_activity_store);
|
|
EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
|
|
|
|
/**
|
|
* ata_change_queue_depth - Set a device maximum queue depth
|
|
* @ap: ATA port of the target device
|
|
* @sdev: SCSI device to configure queue depth for
|
|
* @queue_depth: new queue depth
|
|
*
|
|
* Helper to set a device maximum queue depth, usable with both libsas
|
|
* and libata.
|
|
*
|
|
*/
|
|
int ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
|
|
int queue_depth)
|
|
{
|
|
struct ata_device *dev;
|
|
unsigned long flags;
|
|
int max_queue_depth;
|
|
|
|
spin_lock_irqsave(ap->lock, flags);
|
|
|
|
dev = ata_scsi_find_dev(ap, sdev);
|
|
if (!dev || queue_depth < 1 || queue_depth == sdev->queue_depth) {
|
|
spin_unlock_irqrestore(ap->lock, flags);
|
|
return sdev->queue_depth;
|
|
}
|
|
|
|
/*
|
|
* Make sure that the queue depth requested does not exceed the device
|
|
* capabilities.
|
|
*/
|
|
max_queue_depth = min(ATA_MAX_QUEUE, sdev->host->can_queue);
|
|
max_queue_depth = min(max_queue_depth, ata_id_queue_depth(dev->id));
|
|
if (queue_depth > max_queue_depth) {
|
|
spin_unlock_irqrestore(ap->lock, flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* If NCQ is not supported by the device or if the target queue depth
|
|
* is 1 (to disable drive side command queueing), turn off NCQ.
|
|
*/
|
|
if (queue_depth == 1 || !ata_ncq_supported(dev)) {
|
|
dev->flags |= ATA_DFLAG_NCQ_OFF;
|
|
queue_depth = 1;
|
|
} else {
|
|
dev->flags &= ~ATA_DFLAG_NCQ_OFF;
|
|
}
|
|
|
|
spin_unlock_irqrestore(ap->lock, flags);
|
|
|
|
if (queue_depth == sdev->queue_depth)
|
|
return sdev->queue_depth;
|
|
|
|
return scsi_change_queue_depth(sdev, queue_depth);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_change_queue_depth);
|
|
|
|
/**
|
|
* ata_scsi_change_queue_depth - SCSI callback for queue depth config
|
|
* @sdev: SCSI device to configure queue depth for
|
|
* @queue_depth: new queue depth
|
|
*
|
|
* This is libata standard hostt->change_queue_depth callback.
|
|
* SCSI will call into this callback when user tries to set queue
|
|
* depth via sysfs.
|
|
*
|
|
* LOCKING:
|
|
* SCSI layer (we don't care)
|
|
*
|
|
* RETURNS:
|
|
* Newly configured queue depth.
|
|
*/
|
|
int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
|
|
{
|
|
struct ata_port *ap = ata_shost_to_port(sdev->host);
|
|
|
|
return ata_change_queue_depth(ap, sdev, queue_depth);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
|
|
|
|
/**
|
|
* ata_sas_port_alloc - Allocate port for a SAS attached SATA device
|
|
* @host: ATA host container for all SAS ports
|
|
* @port_info: Information from low-level host driver
|
|
* @shost: SCSI host that the scsi device is attached to
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
* RETURNS:
|
|
* ata_port pointer on success / NULL on failure.
|
|
*/
|
|
|
|
struct ata_port *ata_sas_port_alloc(struct ata_host *host,
|
|
struct ata_port_info *port_info,
|
|
struct Scsi_Host *shost)
|
|
{
|
|
struct ata_port *ap;
|
|
|
|
ap = ata_port_alloc(host);
|
|
if (!ap)
|
|
return NULL;
|
|
|
|
ap->port_no = 0;
|
|
ap->lock = &host->lock;
|
|
ap->pio_mask = port_info->pio_mask;
|
|
ap->mwdma_mask = port_info->mwdma_mask;
|
|
ap->udma_mask = port_info->udma_mask;
|
|
ap->flags |= port_info->flags;
|
|
ap->ops = port_info->port_ops;
|
|
ap->cbl = ATA_CBL_SATA;
|
|
ap->print_id = atomic_inc_return(&ata_print_id);
|
|
|
|
return ap;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
|
|
|
|
int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
|
|
{
|
|
return ata_tport_add(parent, ap);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_sas_tport_add);
|
|
|
|
void ata_sas_tport_delete(struct ata_port *ap)
|
|
{
|
|
ata_tport_delete(ap);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
|
|
|
|
/**
|
|
* ata_sas_slave_configure - Default slave_config routine for libata devices
|
|
* @sdev: SCSI device to configure
|
|
* @ap: ATA port to which SCSI device is attached
|
|
*
|
|
* RETURNS:
|
|
* Zero.
|
|
*/
|
|
|
|
int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
|
|
{
|
|
ata_scsi_sdev_config(sdev);
|
|
ata_scsi_dev_config(sdev, ap->link.device);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
|
|
|
|
/**
|
|
* ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
|
|
* @cmd: SCSI command to be sent
|
|
* @ap: ATA port to which the command is being sent
|
|
*
|
|
* RETURNS:
|
|
* Return value from __ata_scsi_queuecmd() if @cmd can be queued,
|
|
* 0 otherwise.
|
|
*/
|
|
|
|
int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (likely(ata_dev_enabled(ap->link.device)))
|
|
rc = __ata_scsi_queuecmd(cmd, ap->link.device);
|
|
else {
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
scsi_done(cmd);
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
|
|
|
|
/**
|
|
* sata_async_notification - SATA async notification handler
|
|
* @ap: ATA port where async notification is received
|
|
*
|
|
* Handler to be called when async notification via SDB FIS is
|
|
* received. This function schedules EH if necessary.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host lock)
|
|
*
|
|
* RETURNS:
|
|
* 1 if EH is scheduled, 0 otherwise.
|
|
*/
|
|
int sata_async_notification(struct ata_port *ap)
|
|
{
|
|
u32 sntf;
|
|
int rc;
|
|
|
|
if (!(ap->flags & ATA_FLAG_AN))
|
|
return 0;
|
|
|
|
rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
|
|
if (rc == 0)
|
|
sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
|
|
|
|
if (!sata_pmp_attached(ap) || rc) {
|
|
/* PMP is not attached or SNTF is not available */
|
|
if (!sata_pmp_attached(ap)) {
|
|
/* PMP is not attached. Check whether ATAPI
|
|
* AN is configured. If so, notify media
|
|
* change.
|
|
*/
|
|
struct ata_device *dev = ap->link.device;
|
|
|
|
if ((dev->class == ATA_DEV_ATAPI) &&
|
|
(dev->flags & ATA_DFLAG_AN))
|
|
ata_scsi_media_change_notify(dev);
|
|
return 0;
|
|
} else {
|
|
/* PMP is attached but SNTF is not available.
|
|
* ATAPI async media change notification is
|
|
* not used. The PMP must be reporting PHY
|
|
* status change, schedule EH.
|
|
*/
|
|
ata_port_schedule_eh(ap);
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* PMP is attached and SNTF is available */
|
|
struct ata_link *link;
|
|
|
|
/* check and notify ATAPI AN */
|
|
ata_for_each_link(link, ap, EDGE) {
|
|
if (!(sntf & (1 << link->pmp)))
|
|
continue;
|
|
|
|
if ((link->device->class == ATA_DEV_ATAPI) &&
|
|
(link->device->flags & ATA_DFLAG_AN))
|
|
ata_scsi_media_change_notify(link->device);
|
|
}
|
|
|
|
/* If PMP is reporting that PHY status of some
|
|
* downstream ports has changed, schedule EH.
|
|
*/
|
|
if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
|
|
ata_port_schedule_eh(ap);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(sata_async_notification);
|
|
|
|
/**
|
|
* ata_eh_read_log_10h - Read log page 10h for NCQ error details
|
|
* @dev: Device to read log page 10h from
|
|
* @tag: Resulting tag of the failed command
|
|
* @tf: Resulting taskfile registers of the failed command
|
|
*
|
|
* Read log page 10h to obtain NCQ error details and clear error
|
|
* condition.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep).
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
static int ata_eh_read_log_10h(struct ata_device *dev,
|
|
int *tag, struct ata_taskfile *tf)
|
|
{
|
|
u8 *buf = dev->link->ap->sector_buf;
|
|
unsigned int err_mask;
|
|
u8 csum;
|
|
int i;
|
|
|
|
err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, 0, buf, 1);
|
|
if (err_mask)
|
|
return -EIO;
|
|
|
|
csum = 0;
|
|
for (i = 0; i < ATA_SECT_SIZE; i++)
|
|
csum += buf[i];
|
|
if (csum)
|
|
ata_dev_warn(dev, "invalid checksum 0x%x on log page 10h\n",
|
|
csum);
|
|
|
|
if (buf[0] & 0x80)
|
|
return -ENOENT;
|
|
|
|
*tag = buf[0] & 0x1f;
|
|
|
|
tf->status = buf[2];
|
|
tf->error = buf[3];
|
|
tf->lbal = buf[4];
|
|
tf->lbam = buf[5];
|
|
tf->lbah = buf[6];
|
|
tf->device = buf[7];
|
|
tf->hob_lbal = buf[8];
|
|
tf->hob_lbam = buf[9];
|
|
tf->hob_lbah = buf[10];
|
|
tf->nsect = buf[12];
|
|
tf->hob_nsect = buf[13];
|
|
if (ata_id_has_ncq_autosense(dev->id) && (tf->status & ATA_SENSE))
|
|
tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16];
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_eh_read_sense_success_ncq_log - Read the sense data for successful
|
|
* NCQ commands log
|
|
* @link: ATA link to get sense data for
|
|
*
|
|
* Read the sense data for successful NCQ commands log page to obtain
|
|
* sense data for all NCQ commands that completed successfully with
|
|
* the sense data available bit set.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep).
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
int ata_eh_read_sense_success_ncq_log(struct ata_link *link)
|
|
{
|
|
struct ata_device *dev = link->device;
|
|
struct ata_port *ap = dev->link->ap;
|
|
u8 *buf = ap->ncq_sense_buf;
|
|
struct ata_queued_cmd *qc;
|
|
unsigned int err_mask, tag;
|
|
u8 *sense, sk = 0, asc = 0, ascq = 0;
|
|
u64 sense_valid, val;
|
|
int ret = 0;
|
|
|
|
err_mask = ata_read_log_page(dev, ATA_LOG_SENSE_NCQ, 0, buf, 2);
|
|
if (err_mask) {
|
|
ata_dev_err(dev,
|
|
"Failed to read Sense Data for Successful NCQ Commands log\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* Check the log header */
|
|
val = get_unaligned_le64(&buf[0]);
|
|
if ((val & 0xffff) != 1 || ((val >> 16) & 0xff) != 0x0f) {
|
|
ata_dev_err(dev,
|
|
"Invalid Sense Data for Successful NCQ Commands log\n");
|
|
return -EIO;
|
|
}
|
|
|
|
sense_valid = (u64)buf[8] | ((u64)buf[9] << 8) |
|
|
((u64)buf[10] << 16) | ((u64)buf[11] << 24);
|
|
|
|
ata_qc_for_each_raw(ap, qc, tag) {
|
|
if (!(qc->flags & ATA_QCFLAG_EH) ||
|
|
!(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) ||
|
|
qc->err_mask ||
|
|
ata_dev_phys_link(qc->dev) != link)
|
|
continue;
|
|
|
|
/*
|
|
* If the command does not have any sense data, clear ATA_SENSE.
|
|
* Keep ATA_QCFLAG_EH_SUCCESS_CMD so that command is finished.
|
|
*/
|
|
if (!(sense_valid & (1ULL << tag))) {
|
|
qc->result_tf.status &= ~ATA_SENSE;
|
|
continue;
|
|
}
|
|
|
|
sense = &buf[32 + 24 * tag];
|
|
sk = sense[0];
|
|
asc = sense[1];
|
|
ascq = sense[2];
|
|
|
|
if (!ata_scsi_sense_is_valid(sk, asc, ascq)) {
|
|
ret = -EIO;
|
|
continue;
|
|
}
|
|
|
|
/* Set sense without also setting scsicmd->result */
|
|
scsi_build_sense_buffer(dev->flags & ATA_DFLAG_D_SENSE,
|
|
qc->scsicmd->sense_buffer, sk,
|
|
asc, ascq);
|
|
qc->flags |= ATA_QCFLAG_SENSE_VALID;
|
|
|
|
/*
|
|
* If we have sense data, call scsi_check_sense() in order to
|
|
* set the correct SCSI ML byte (if any). No point in checking
|
|
* the return value, since the command has already completed
|
|
* successfully.
|
|
*/
|
|
scsi_check_sense(qc->scsicmd);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_eh_read_sense_success_ncq_log);
|
|
|
|
/**
|
|
* ata_eh_analyze_ncq_error - analyze NCQ error
|
|
* @link: ATA link to analyze NCQ error for
|
|
*
|
|
* Read log page 10h, determine the offending qc and acquire
|
|
* error status TF. For NCQ device errors, all LLDDs have to do
|
|
* is setting AC_ERR_DEV in ehi->err_mask. This function takes
|
|
* care of the rest.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep).
|
|
*/
|
|
void ata_eh_analyze_ncq_error(struct ata_link *link)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct ata_eh_context *ehc = &link->eh_context;
|
|
struct ata_device *dev = link->device;
|
|
struct ata_queued_cmd *qc;
|
|
struct ata_taskfile tf;
|
|
int tag, rc;
|
|
|
|
/* if frozen, we can't do much */
|
|
if (ata_port_is_frozen(ap))
|
|
return;
|
|
|
|
/* is it NCQ device error? */
|
|
if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
|
|
return;
|
|
|
|
/* has LLDD analyzed already? */
|
|
ata_qc_for_each_raw(ap, qc, tag) {
|
|
if (!(qc->flags & ATA_QCFLAG_EH))
|
|
continue;
|
|
|
|
if (qc->err_mask)
|
|
return;
|
|
}
|
|
|
|
/* okay, this error is ours */
|
|
memset(&tf, 0, sizeof(tf));
|
|
rc = ata_eh_read_log_10h(dev, &tag, &tf);
|
|
if (rc) {
|
|
ata_link_err(link, "failed to read log page 10h (errno=%d)\n",
|
|
rc);
|
|
return;
|
|
}
|
|
|
|
if (!(link->sactive & (1 << tag))) {
|
|
ata_link_err(link, "log page 10h reported inactive tag %d\n",
|
|
tag);
|
|
return;
|
|
}
|
|
|
|
/* we've got the perpetrator, condemn it */
|
|
qc = __ata_qc_from_tag(ap, tag);
|
|
memcpy(&qc->result_tf, &tf, sizeof(tf));
|
|
qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
|
|
qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
|
|
|
|
/*
|
|
* If the device supports NCQ autosense, ata_eh_read_log_10h() will have
|
|
* stored the sense data in qc->result_tf.auxiliary.
|
|
*/
|
|
if (qc->result_tf.auxiliary) {
|
|
char sense_key, asc, ascq;
|
|
|
|
sense_key = (qc->result_tf.auxiliary >> 16) & 0xff;
|
|
asc = (qc->result_tf.auxiliary >> 8) & 0xff;
|
|
ascq = qc->result_tf.auxiliary & 0xff;
|
|
if (ata_scsi_sense_is_valid(sense_key, asc, ascq)) {
|
|
ata_scsi_set_sense(dev, qc->scsicmd, sense_key, asc,
|
|
ascq);
|
|
ata_scsi_set_sense_information(dev, qc->scsicmd,
|
|
&qc->result_tf);
|
|
qc->flags |= ATA_QCFLAG_SENSE_VALID;
|
|
}
|
|
}
|
|
|
|
ata_qc_for_each_raw(ap, qc, tag) {
|
|
if (!(qc->flags & ATA_QCFLAG_EH) ||
|
|
qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD ||
|
|
ata_dev_phys_link(qc->dev) != link)
|
|
continue;
|
|
|
|
/* Skip the single QC which caused the NCQ error. */
|
|
if (qc->err_mask)
|
|
continue;
|
|
|
|
/*
|
|
* For SATA, the STATUS and ERROR fields are shared for all NCQ
|
|
* commands that were completed with the same SDB FIS.
|
|
* Therefore, we have to clear the ATA_ERR bit for all QCs
|
|
* except the one that caused the NCQ error.
|
|
*/
|
|
qc->result_tf.status &= ~ATA_ERR;
|
|
qc->result_tf.error = 0;
|
|
|
|
/*
|
|
* If we get a NCQ error, that means that a single command was
|
|
* aborted. All other failed commands for our link should be
|
|
* retried and has no business of going though further scrutiny
|
|
* by ata_eh_link_autopsy().
|
|
*/
|
|
qc->flags |= ATA_QCFLAG_RETRY;
|
|
}
|
|
|
|
ehc->i.err_mask &= ~AC_ERR_DEV;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
|