linux-imx

// SPDX-License-Identifier: GPL-2.0

#include <linux/kernel.h>

#include <linux/gfp.h>

#include <linux/ide.h>

​

int generic_ide_suspend(struct device *dev, pm_message_t mesg)

{

    ide_drive_t *drive = to_ide_device(dev);

    ide_drive_t *pair = ide_get_pair_dev(drive);

    ide_hwif_t *hwif = drive->hwif;

    struct request *rq;

    struct ide_pm_state rqpm;

    int ret;

​

    if (ide_port_acpi(hwif)) {

        /* call ACPI _GTM only once */

        if ((drive->dn & 1) == 0 || pair == NULL)

            ide_acpi_get_timing(hwif);

    }

​

    memset(&rqpm, 0, sizeof(rqpm));

    rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);

    ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;

    ide_req(rq)->special = &rqpm;

    rqpm.pm_step = IDE_PM_START_SUSPEND;

    if (mesg.event == PM_EVENT_PRETHAW)

        mesg.event = PM_EVENT_FREEZE;

    rqpm.pm_state = mesg.event;

​

    blk_execute_rq(drive->queue, NULL, rq, 0);

    ret = scsi_req(rq)->result ? -EIO : 0;

    blk_put_request(rq);

​

    if (ret == 0 && ide_port_acpi(hwif)) {

        /* call ACPI _PS3 only after both devices are suspended */

        if ((drive->dn & 1) || pair == NULL)

            ide_acpi_set_state(hwif, 0);

    }

​

    return ret;

}

​

static int ide_pm_execute_rq(struct request *rq)

{

    struct request_queue *q = rq->q;

​

    if (unlikely(blk_queue_dying(q))) {

        rq->rq_flags |= RQF_QUIET;

        scsi_req(rq)->result = -ENXIO;

        blk_mq_end_request(rq, BLK_STS_OK);

        return -ENXIO;

    }

    blk_execute_rq(q, NULL, rq, true);

​

    return scsi_req(rq)->result ? -EIO : 0;

}

​

int generic_ide_resume(struct device *dev)

{

    ide_drive_t *drive = to_ide_device(dev);

    ide_drive_t *pair = ide_get_pair_dev(drive);

    ide_hwif_t *hwif = drive->hwif;

    struct request *rq;

    struct ide_pm_state rqpm;

    int err;

​

    blk_mq_start_stopped_hw_queues(drive->queue, true);

​

    if (ide_port_acpi(hwif)) {

        /* call ACPI _PS0 / _STM only once */

        if ((drive->dn & 1) == 0 || pair == NULL) {

            ide_acpi_set_state(hwif, 1);

            ide_acpi_push_timing(hwif);

        }

​

        ide_acpi_exec_tfs(drive);

    }

​

    memset(&rqpm, 0, sizeof(rqpm));

    rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_PREEMPT);

    ide_req(rq)->type = ATA_PRIV_PM_RESUME;

    ide_req(rq)->special = &rqpm;

    rqpm.pm_step = IDE_PM_START_RESUME;

    rqpm.pm_state = PM_EVENT_ON;

​

    err = ide_pm_execute_rq(rq);

    blk_put_request(rq);

​

    if (err == 0 && dev->driver) {

        struct ide_driver *drv = to_ide_driver(dev->driver);

​

        if (drv->resume)