Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *	scsi_pm.c	Copyright (C) 2010 Alan Stern
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	SCSI dynamic Power Management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *		Initial version: Alan Stern <stern@rowland.harvard.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/async.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/blk-pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <scsi/scsi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <scsi/scsi_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <scsi/scsi_driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <scsi/scsi_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "scsi_priv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static int do_scsi_suspend(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	return pm && pm->suspend ? pm->suspend(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) static int do_scsi_freeze(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	return pm && pm->freeze ? pm->freeze(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static int do_scsi_poweroff(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	return pm && pm->poweroff ? pm->poweroff(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int do_scsi_resume(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	return pm && pm->resume ? pm->resume(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static int do_scsi_thaw(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	return pm && pm->thaw ? pm->thaw(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static int do_scsi_restore(struct device *dev, const struct dev_pm_ops *pm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	return pm && pm->restore ? pm->restore(dev) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static int scsi_dev_type_suspend(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		int (*cb)(struct device *, const struct dev_pm_ops *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	/* flush pending in-flight resume operations, suspend is synchronous */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	async_synchronize_full_domain(&scsi_sd_pm_domain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	err = scsi_device_quiesce(to_scsi_device(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (err == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		err = cb(dev, pm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			scsi_device_resume(to_scsi_device(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	dev_dbg(dev, "scsi suspend: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int scsi_dev_type_resume(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		int (*cb)(struct device *, const struct dev_pm_ops *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	err = cb(dev, pm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	scsi_device_resume(to_scsi_device(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	dev_dbg(dev, "scsi resume: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (err == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		pm_runtime_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		err = pm_runtime_set_active(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		pm_runtime_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		 * Forcibly set runtime PM status of request queue to "active"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		 * to make sure we can again get requests from the queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		 * (see also blk_pm_peek_request()).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		 * The resume hook will correct runtime PM status of the disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (!err && scsi_is_sdev_device(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			struct scsi_device *sdev = to_scsi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			blk_set_runtime_active(sdev->request_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) scsi_bus_suspend_common(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		int (*cb)(struct device *, const struct dev_pm_ops *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (scsi_is_sdev_device(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		 * All the high-level SCSI drivers that implement runtime
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		 * PM treat runtime suspend, system suspend, and system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		 * hibernate nearly identically. In all cases the requirements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		 * for runtime suspension are stricter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		if (pm_runtime_suspended(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		err = scsi_dev_type_suspend(dev, cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static void async_sdev_resume(void *dev, async_cookie_t cookie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	scsi_dev_type_resume(dev, do_scsi_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static void async_sdev_thaw(void *dev, async_cookie_t cookie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	scsi_dev_type_resume(dev, do_scsi_thaw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static void async_sdev_restore(void *dev, async_cookie_t cookie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	scsi_dev_type_resume(dev, do_scsi_restore);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static int scsi_bus_resume_common(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		int (*cb)(struct device *, const struct dev_pm_ops *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	async_func_t fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (!scsi_is_sdev_device(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		fn = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	else if (cb == do_scsi_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		fn = async_sdev_resume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	else if (cb == do_scsi_thaw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		fn = async_sdev_thaw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	else if (cb == do_scsi_restore)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		fn = async_sdev_restore;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		fn = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (fn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		async_schedule_domain(fn, dev, &scsi_sd_pm_domain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		 * If a user has disabled async probing a likely reason
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		 * is due to a storage enclosure that does not inject
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		 * staggered spin-ups.  For safety, make resume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		 * synchronous as well in that case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (strncmp(scsi_scan_type, "async", 5) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			async_synchronize_full_domain(&scsi_sd_pm_domain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		pm_runtime_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		pm_runtime_set_active(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		pm_runtime_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int scsi_bus_prepare(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (scsi_is_host_device(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		/* Wait until async scanning is finished */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		scsi_complete_async_scans();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int scsi_bus_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return scsi_bus_suspend_common(dev, do_scsi_suspend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int scsi_bus_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return scsi_bus_resume_common(dev, do_scsi_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int scsi_bus_freeze(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return scsi_bus_suspend_common(dev, do_scsi_freeze);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int scsi_bus_thaw(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	return scsi_bus_resume_common(dev, do_scsi_thaw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int scsi_bus_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	return scsi_bus_suspend_common(dev, do_scsi_poweroff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int scsi_bus_restore(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	return scsi_bus_resume_common(dev, do_scsi_restore);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #else /* CONFIG_PM_SLEEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #define scsi_bus_prepare		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) #define scsi_bus_suspend		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #define scsi_bus_resume			NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #define scsi_bus_freeze			NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) #define scsi_bus_thaw			NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #define scsi_bus_poweroff		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define scsi_bus_restore		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) #endif /* CONFIG_PM_SLEEP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int sdev_runtime_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	struct scsi_device *sdev = to_scsi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	err = blk_pre_runtime_suspend(sdev->request_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (pm && pm->runtime_suspend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		err = pm->runtime_suspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	blk_post_runtime_suspend(sdev->request_queue, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static int scsi_runtime_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	dev_dbg(dev, "scsi_runtime_suspend\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (scsi_is_sdev_device(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		err = sdev_runtime_suspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	/* Insert hooks here for targets, hosts, and transport classes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int sdev_runtime_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct scsi_device *sdev = to_scsi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	blk_pre_runtime_resume(sdev->request_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (pm && pm->runtime_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		err = pm->runtime_resume(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	blk_post_runtime_resume(sdev->request_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static int scsi_runtime_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	dev_dbg(dev, "scsi_runtime_resume\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (scsi_is_sdev_device(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		err = sdev_runtime_resume(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	/* Insert hooks here for targets, hosts, and transport classes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int scsi_runtime_idle(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	dev_dbg(dev, "scsi_runtime_idle\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	/* Insert hooks here for targets, hosts, and transport classes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (scsi_is_sdev_device(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		pm_runtime_mark_last_busy(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		pm_runtime_autosuspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) int scsi_autopm_get_device(struct scsi_device *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	int	err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	err = pm_runtime_get_sync(&sdev->sdev_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	if (err < 0 && err !=-EACCES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		pm_runtime_put_sync(&sdev->sdev_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) EXPORT_SYMBOL_GPL(scsi_autopm_get_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) void scsi_autopm_put_device(struct scsi_device *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	pm_runtime_put_sync(&sdev->sdev_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) EXPORT_SYMBOL_GPL(scsi_autopm_put_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) void scsi_autopm_get_target(struct scsi_target *starget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	pm_runtime_get_sync(&starget->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) void scsi_autopm_put_target(struct scsi_target *starget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	pm_runtime_put_sync(&starget->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) int scsi_autopm_get_host(struct Scsi_Host *shost)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	int	err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	err = pm_runtime_get_sync(&shost->shost_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (err < 0 && err !=-EACCES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		pm_runtime_put_sync(&shost->shost_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) void scsi_autopm_put_host(struct Scsi_Host *shost)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	pm_runtime_put_sync(&shost->shost_gendev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) const struct dev_pm_ops scsi_bus_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	.prepare =		scsi_bus_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	.suspend =		scsi_bus_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.resume =		scsi_bus_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	.freeze =		scsi_bus_freeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	.thaw =			scsi_bus_thaw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	.poweroff =		scsi_bus_poweroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	.restore =		scsi_bus_restore,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	.runtime_suspend =	scsi_runtime_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	.runtime_resume =	scsi_runtime_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	.runtime_idle =		scsi_runtime_idle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) };