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1495 lines
38 KiB
1495 lines
38 KiB
// 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 <[email protected]> |
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*/ |
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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 <linux/libata.h> |
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|
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#include "libata.h" |
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#include "libata-transport.h" |
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|
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/* debounce timing parameters in msecs { interval, duration, timeout } */ |
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const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
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EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
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const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; |
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EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); |
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const unsigned long 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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/** |
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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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|
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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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/** |
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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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|
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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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/** |
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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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|
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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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/** |
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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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|
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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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|
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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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/** |
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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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|
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fis[2] = tf->command; |
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fis[3] = tf->feature; |
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|
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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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|
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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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|
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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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|
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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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/** |
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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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|
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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->command = fis[2]; /* status */ |
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tf->feature = fis[3]; /* error */ |
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|
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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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|
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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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|
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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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/** |
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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 long *params, |
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unsigned long deadline) |
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{ |
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unsigned long interval = params[0]; |
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unsigned long 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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|
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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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|
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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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|
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last = cur; |
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last_jiffies = jiffies; |
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|
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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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|
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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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|
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/* unstable, start over */ |
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last = cur; |
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last_jiffies = jiffies; |
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|
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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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/** |
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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 long *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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|
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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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/* |
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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_DB_DELAY)) |
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ata_msleep(link->ap, 200); |
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|
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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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|
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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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|
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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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|
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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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/** |
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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 |
|
* returning. |
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* |
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* LOCKING: |
|
* 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; |
|
} |
|
break; |
|
case ATA_LPM_MED_POWER: |
|
/* allow LPM to PARTIAL */ |
|
scontrol &= ~(0x1 << 8); |
|
scontrol |= (0x6 << 8); |
|
break; |
|
case ATA_LPM_MED_POWER_WITH_DIPM: |
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case ATA_LPM_MIN_POWER_WITH_PARTIAL: |
|
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 */ |
|
scontrol &= ~(0x7 << 8); |
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else { |
|
/* empty port, power off */ |
|
scontrol &= ~0xf; |
|
scontrol |= (0x1 << 2); |
|
} |
|
break; |
|
default: |
|
WARN_ON(1); |
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} |
|
|
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rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
|
if (rc) |
|
return rc; |
|
|
|
/* give the link time to transit out of LPM state */ |
|
if (woken_up) |
|
msleep(10); |
|
|
|
/* clear PHYRDY_CHG from SError */ |
|
ehc->i.serror &= ~SERR_PHYRDY_CHG; |
|
return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); |
|
} |
|
EXPORT_SYMBOL_GPL(sata_link_scr_lpm); |
|
|
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static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
|
{ |
|
struct ata_link *host_link = &link->ap->link; |
|
u32 limit, target, spd; |
|
|
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limit = link->sata_spd_limit; |
|
|
|
/* Don't configure downstream link faster than upstream link. |
|
* It doesn't speed up anything and some PMPs choke on such |
|
* configuration. |
|
*/ |
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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; |
|
|
|
if (limit == UINT_MAX) |
|
target = 0; |
|
else |
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target = fls(limit); |
|
|
|
spd = (*scontrol >> 4) & 0xf; |
|
*scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
|
|
|
return spd != target; |
|
} |
|
|
|
/** |
|
* sata_set_spd_needed - is SATA spd configuration needed |
|
* @link: Link in question |
|
* |
|
* Test whether the spd limit in SControl matches |
|
* @link->sata_spd_limit. This function is used to determine |
|
* whether hardreset is necessary to apply SATA spd |
|
* configuration. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
* |
|
* RETURNS: |
|
* 1 if SATA spd configuration is needed, 0 otherwise. |
|
*/ |
|
static int sata_set_spd_needed(struct ata_link *link) |
|
{ |
|
u32 scontrol; |
|
|
|
if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
|
return 1; |
|
|
|
return __sata_set_spd_needed(link, &scontrol); |
|
} |
|
|
|
/** |
|
* sata_set_spd - set SATA spd according to spd limit |
|
* @link: Link to set SATA spd for |
|
* |
|
* Set SATA spd of @link according to sata_spd_limit. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
* |
|
* RETURNS: |
|
* 0 if spd doesn't need to be changed, 1 if spd has been |
|
* changed. Negative errno if SCR registers are inaccessible. |
|
*/ |
|
int sata_set_spd(struct ata_link *link) |
|
{ |
|
u32 scontrol; |
|
int rc; |
|
|
|
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
|
return rc; |
|
|
|
if (!__sata_set_spd_needed(link, &scontrol)) |
|
return 0; |
|
|
|
if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
|
return rc; |
|
|
|
return 1; |
|
} |
|
EXPORT_SYMBOL_GPL(sata_set_spd); |
|
|
|
/** |
|
* sata_link_hardreset - reset link via SATA phy reset |
|
* @link: link to reset |
|
* @timing: timing parameters { interval, duration, timeout } in msec |
|
* @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 long *timing, |
|
unsigned long deadline, |
|
bool *online, int (*check_ready)(struct ata_link *)) |
|
{ |
|
u32 scontrol; |
|
int rc; |
|
|
|
DPRINTK("ENTER\n"); |
|
|
|
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); |
|
} |
|
DPRINTK("EXIT, rc=%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; |
|
} |
|
|
|
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 snprintf(buf, PAGE_SIZE, "%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_ENABLE; |
|
spin_unlock_irq(ap->lock); |
|
|
|
return rc ? rc : snprintf(buf, 20, "%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) |
|
dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; |
|
else |
|
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; |
|
|
|
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); |
|
|
|
struct device_attribute *ata_ncq_sdev_attrs[] = { |
|
&dev_attr_unload_heads, |
|
&dev_attr_ncq_prio_enable, |
|
&dev_attr_ncq_prio_supported, |
|
NULL |
|
}; |
|
EXPORT_SYMBOL_GPL(ata_ncq_sdev_attrs); |
|
|
|
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 snprintf(buf, 23, "%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 - helper for ata_scsi_change_queue_depth |
|
* @ap: ATA port to which the device change the queue depth |
|
* @sdev: SCSI device to configure queue depth for |
|
* @queue_depth: new queue depth |
|
* |
|
* libsas and libata have different approaches for associating a sdev to |
|
* its ata_port. |
|
* |
|
*/ |
|
int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, |
|
int queue_depth) |
|
{ |
|
struct ata_device *dev; |
|
unsigned long flags; |
|
|
|
if (queue_depth < 1 || queue_depth == sdev->queue_depth) |
|
return sdev->queue_depth; |
|
|
|
dev = ata_scsi_find_dev(ap, sdev); |
|
if (!dev || !ata_dev_enabled(dev)) |
|
return sdev->queue_depth; |
|
|
|
/* NCQ enabled? */ |
|
spin_lock_irqsave(ap->lock, flags); |
|
dev->flags &= ~ATA_DFLAG_NCQ_OFF; |
|
if (queue_depth == 1 || !ata_ncq_enabled(dev)) { |
|
dev->flags |= ATA_DFLAG_NCQ_OFF; |
|
queue_depth = 1; |
|
} |
|
spin_unlock_irqrestore(ap->lock, flags); |
|
|
|
/* limit and apply queue depth */ |
|
queue_depth = min(queue_depth, sdev->host->can_queue); |
|
queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); |
|
queue_depth = min(queue_depth, ATA_MAX_QUEUE); |
|
|
|
if (sdev->queue_depth == queue_depth) |
|
return -EINVAL; |
|
|
|
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; |
|
|
|
return ap; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_alloc); |
|
|
|
/** |
|
* ata_sas_port_start - Set port up for dma. |
|
* @ap: Port to initialize |
|
* |
|
* Called just after data structures for each port are |
|
* initialized. |
|
* |
|
* May be used as the port_start() entry in ata_port_operations. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
*/ |
|
int ata_sas_port_start(struct ata_port *ap) |
|
{ |
|
/* |
|
* the port is marked as frozen at allocation time, but if we don't |
|
* have new eh, we won't thaw it |
|
*/ |
|
if (!ap->ops->error_handler) |
|
ap->pflags &= ~ATA_PFLAG_FROZEN; |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_start); |
|
|
|
/** |
|
* ata_sas_port_stop - Undo ata_sas_port_start() |
|
* @ap: Port to shut down |
|
* |
|
* May be used as the port_stop() entry in ata_port_operations. |
|
* |
|
* LOCKING: |
|
* Inherited from caller. |
|
*/ |
|
|
|
void ata_sas_port_stop(struct ata_port *ap) |
|
{ |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_stop); |
|
|
|
/** |
|
* ata_sas_async_probe - simply schedule probing and return |
|
* @ap: Port to probe |
|
* |
|
* For batch scheduling of probe for sas attached ata devices, assumes |
|
* the port has already been through ata_sas_port_init() |
|
*/ |
|
void ata_sas_async_probe(struct ata_port *ap) |
|
{ |
|
__ata_port_probe(ap); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_async_probe); |
|
|
|
int ata_sas_sync_probe(struct ata_port *ap) |
|
{ |
|
return ata_port_probe(ap); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_sync_probe); |
|
|
|
|
|
/** |
|
* ata_sas_port_init - Initialize a SATA device |
|
* @ap: SATA port to initialize |
|
* |
|
* LOCKING: |
|
* PCI/etc. bus probe sem. |
|
* |
|
* RETURNS: |
|
* Zero on success, non-zero on error. |
|
*/ |
|
|
|
int ata_sas_port_init(struct ata_port *ap) |
|
{ |
|
int rc = ap->ops->port_start(ap); |
|
|
|
if (rc) |
|
return rc; |
|
ap->print_id = atomic_inc_return(&ata_print_id); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_init); |
|
|
|
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_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc |
|
* @ap: SATA port to destroy |
|
* |
|
*/ |
|
|
|
void ata_sas_port_destroy(struct ata_port *ap) |
|
{ |
|
if (ap->ops->port_stop) |
|
ap->ops->port_stop(ap); |
|
kfree(ap); |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_port_destroy); |
|
|
|
/** |
|
* 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; |
|
|
|
ata_scsi_dump_cdb(ap, cmd); |
|
|
|
if (likely(ata_dev_enabled(ap->link.device))) |
|
rc = __ata_scsi_queuecmd(cmd, ap->link.device); |
|
else { |
|
cmd->result = (DID_BAD_TARGET << 16); |
|
cmd->scsi_done(cmd); |
|
} |
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_sas_queuecmd); |
|
|
|
int ata_sas_allocate_tag(struct ata_port *ap) |
|
{ |
|
unsigned int max_queue = ap->host->n_tags; |
|
unsigned int i, tag; |
|
|
|
for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { |
|
tag = tag < max_queue ? tag : 0; |
|
|
|
/* the last tag is reserved for internal command. */ |
|
if (ata_tag_internal(tag)) |
|
continue; |
|
|
|
if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { |
|
ap->sas_last_tag = tag; |
|
return tag; |
|
} |
|
} |
|
return -1; |
|
} |
|
|
|
void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) |
|
{ |
|
clear_bit(tag, &ap->sas_tag_allocated); |
|
} |
|
|
|
/** |
|
* 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->command = buf[2]; |
|
tf->feature = 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 (dev->class == ATA_DEV_ZAC && ata_id_has_ncq_autosense(dev->id)) |
|
tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16]; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* 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 (ap->pflags & ATA_PFLAG_FROZEN) |
|
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_FAILED)) |
|
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 (dev->class == ATA_DEV_ZAC && |
|
((qc->result_tf.command & ATA_SENSE) || 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; |
|
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; |
|
} |
|
|
|
ehc->i.err_mask &= ~AC_ERR_DEV; |
|
} |
|
EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
|
|
|