Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Serial Attached SCSI (SAS) Event processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
^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/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <scsi/scsi_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "sas_internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 	/* it's added to the defer_q when draining so return succeed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	int rc = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	if (!test_bit(SAS_HA_REGISTERED, &ha->state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	if (test_bit(SAS_HA_DRAINING, &ha->state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 		/* add it to the defer list, if not already pending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		if (list_empty(&sw->drain_node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 			list_add_tail(&sw->drain_node, &ha->defer_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		rc = queue_work(ha->event_q, &sw->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static int sas_queue_event(int event, struct sas_work *work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			    struct sas_ha_struct *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	spin_lock_irqsave(&ha->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	rc = sas_queue_work(ha, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	spin_unlock_irqrestore(&ha->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) void __sas_drain_work(struct sas_ha_struct *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct sas_work *sw, *_sw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	set_bit(SAS_HA_DRAINING, &ha->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/* flush submitters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	spin_lock_irq(&ha->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	spin_unlock_irq(&ha->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	drain_workqueue(ha->event_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	drain_workqueue(ha->disco_q);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	spin_lock_irq(&ha->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	clear_bit(SAS_HA_DRAINING, &ha->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		list_del_init(&sw->drain_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		ret = sas_queue_work(ha, sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		if (ret != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			sas_free_event(to_asd_sas_event(&sw->work));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	spin_unlock_irq(&ha->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) int sas_drain_work(struct sas_ha_struct *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	err = mutex_lock_interruptible(&ha->drain_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (test_bit(SAS_HA_REGISTERED, &ha->state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		__sas_drain_work(ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	mutex_unlock(&ha->drain_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) EXPORT_SYMBOL_GPL(sas_drain_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) void sas_disable_revalidation(struct sas_ha_struct *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	mutex_lock(&ha->disco_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	mutex_unlock(&ha->disco_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) void sas_enable_revalidation(struct sas_ha_struct *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	mutex_lock(&ha->disco_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	for (i = 0; i < ha->num_phys; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		struct asd_sas_port *port = ha->sas_port[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		const int ev = DISCE_REVALIDATE_DOMAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		struct sas_discovery *d = &port->disc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		struct asd_sas_phy *sas_phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		if (!test_and_clear_bit(ev, &d->pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		if (list_empty(&port->phy_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		sas_phy = container_of(port->phy_list.next, struct asd_sas_phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				port_phy_el);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	mutex_unlock(&ha->disco_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static void sas_port_event_worker(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	struct asd_sas_event *ev = to_asd_sas_event(work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	sas_port_event_fns[ev->event](work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	sas_free_event(ev);
^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 sas_phy_event_worker(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct asd_sas_event *ev = to_asd_sas_event(work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	sas_phy_event_fns[ev->event](work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	sas_free_event(ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static int __sas_notify_port_event(struct asd_sas_phy *phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 				   enum port_event event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 				   struct asd_sas_event *ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct sas_ha_struct *ha = phy->ha;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	BUG_ON(event >= PORT_NUM_EVENTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	INIT_SAS_EVENT(ev, sas_port_event_worker, phy, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	ret = sas_queue_event(event, &ev->work, ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (ret != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		sas_free_event(ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int sas_notify_port_event_gfp(struct asd_sas_phy *phy, enum port_event event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			      gfp_t gfp_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct asd_sas_event *ev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	ev = sas_alloc_event_gfp(phy, gfp_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (!ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return __sas_notify_port_event(phy, event, ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL_GPL(sas_notify_port_event_gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct asd_sas_event *ev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	ev = sas_alloc_event(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (!ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return __sas_notify_port_event(phy, event, ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) EXPORT_SYMBOL_GPL(sas_notify_port_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static inline int __sas_notify_phy_event(struct asd_sas_phy *phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 					 enum phy_event event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 					 struct asd_sas_event *ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct sas_ha_struct *ha = phy->ha;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	BUG_ON(event >= PHY_NUM_EVENTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	INIT_SAS_EVENT(ev, sas_phy_event_worker, phy, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	ret = sas_queue_event(event, &ev->work, ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (ret != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		sas_free_event(ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return ret;
^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) int sas_notify_phy_event_gfp(struct asd_sas_phy *phy, enum phy_event event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			     gfp_t gfp_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	struct asd_sas_event *ev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	ev = sas_alloc_event_gfp(phy, gfp_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (!ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	return __sas_notify_phy_event(phy, event, ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) EXPORT_SYMBOL_GPL(sas_notify_phy_event_gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct asd_sas_event *ev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	ev = sas_alloc_event(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (!ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	return __sas_notify_phy_event(phy, event, ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) EXPORT_SYMBOL_GPL(sas_notify_phy_event);