libata-pmp.c File Reference

#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/libata.h>
#include <linux/slab.h>
#include "libata.h"
#include "libata-transport.h"

Go to the source code of this file.

Macros
#define	PMP_GSCR_SII_POL   129

Functions
int	sata_pmp_qc_defer_cmd_switch (struct ata_queued_cmd *qc)
int	sata_pmp_scr_read (struct ata_link *link, int reg, u32 *r_val)
int	sata_pmp_scr_write (struct ata_link *link, int reg, u32 val)
int	sata_pmp_set_lpm (struct ata_link *link, enum ata_lpm_policy policy, unsigned hints)
int	sata_pmp_attach (struct ata_device *dev)
void	sata_pmp_error_handler (struct ata_port *ap)
	EXPORT_SYMBOL_GPL (sata_pmp_port_ops)
	EXPORT_SYMBOL_GPL (sata_pmp_qc_defer_cmd_switch)
	EXPORT_SYMBOL_GPL (sata_pmp_error_handler)

Variables
struct ata_port_operations	sata_pmp_port_ops

Macro Definition Documentation

#define PMP_GSCR_SII_POL   129

Definition at line 257 of file libata-pmp.c.

Function Documentation

EXPORT_SYMBOL_GPL

(

sata_pmp_port_ops

)

EXPORT_SYMBOL_GPL

(

sata_pmp_qc_defer_cmd_switch

)

EXPORT_SYMBOL_GPL

(

sata_pmp_error_handler

)

int sata_pmp_attach

(

struct ata_device *

dev

)

sata_pmp_attach - attach a SATA PMP device : SATA PMP device to attach

Configure and attach SATA PMP device . This function is also responsible for allocating and initializing PMP links.

LOCKING: Kernel thread context (may sleep).

RETURNS: 0 on success, -errno on failure.

Definition at line 475 of file libata-pmp.c.

void sata_pmp_error_handler

(

struct ata_port *

ap

)

sata_pmp_error_handler - do standard error handling for PMP-enabled host : host port to handle error for

Perform standard error handling sequence for PMP-enabled host .

LOCKING: Kernel thread context (may sleep).

Definition at line 1092 of file libata-pmp.c.

int sata_pmp_qc_defer_cmd_switch

(

struct ata_queued_cmd *

qc

)

sata_pmp_qc_defer_cmd_switch - qc_defer for command switching PMP : ATA command in question

A host which has command switching PMP support cannot issue commands to multiple links simultaneously.

LOCKING: spin_lock_irqsave(host lock)

RETURNS: ATA_DEFER_* if deferring is needed, 0 otherwise.

Definition at line 110 of file libata-pmp.c.

int sata_pmp_scr_read	(	struct ata_link *	link,
		int	reg,
		u32 *	r_val
	)

sata_pmp_scr_read - read PSCR ATA link to read PSCR for : PSCR to read : resulting value

Read PSCR into for to be called from ata_scr_read().

LOCKING: Kernel thread context (may sleep).

RETURNS: 0 on success, -errno on failure.

Definition at line 142 of file libata-pmp.c.

int sata_pmp_scr_write	(	struct ata_link *	link,
		int	reg,
		u32	val
	)

sata_pmp_scr_write - write PSCR ATA link to write PSCR for : PSCR to write : value to be written

Write to PSCR for to be called from ata_scr_write() and ata_scr_write_flush().

LOCKING: Kernel thread context (may sleep).

RETURNS: 0 on success, -errno on failure.

Definition at line 173 of file libata-pmp.c.

int sata_pmp_set_lpm	(	struct ata_link *	link,
		enum ata_lpm_policy	policy,
		unsigned	hints
	)

sata_pmp_set_lpm - configure LPM for a PMP link PMP link to configure LPM for : target LPM policy : LPM hints

Configure LPM for This function will contain any PMP specific workarounds if necessary.

LOCKING: EH context.

RETURNS: 0 on success, -errno on failure.

Definition at line 204 of file libata-pmp.c.

Variable Documentation

struct ata_port_operations sata_pmp_port_ops

Initial value:

= {
    .inherits       = &sata_port_ops,
    .pmp_prereset       = ata_std_prereset,
    .pmp_hardreset      = sata_std_hardreset,
    .pmp_postreset      = ata_std_postreset,
    .error_handler      = sata_pmp_error_handler,
}

Definition at line 17 of file libata-pmp.c.