ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/scsi/libsas/sas_port.c b/marvell/linux/drivers/scsi/libsas/sas_port.c
new file mode 100644
index 0000000..f751a12
--- /dev/null
+++ b/marvell/linux/drivers/scsi/libsas/sas_port.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Serial Attached SCSI (SAS) Port class
+ *
+ * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
+ * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+ */
+
+#include "sas_internal.h"
+
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_sas.h>
+#include "../scsi_sas_internal.h"
+
+static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
+{
+ struct sas_ha_struct *sas_ha = phy->ha;
+
+ if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
+ SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports &&
+ memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0))
+ return false;
+ return true;
+}
+
+static void sas_resume_port(struct asd_sas_phy *phy)
+{
+ struct domain_device *dev, *n;
+ struct asd_sas_port *port = phy->port;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);
+
+ if (si->dft->lldd_port_formed)
+ si->dft->lldd_port_formed(phy);
+
+ if (port->suspended)
+ port->suspended = 0;
+ else {
+ /* we only need to handle "link returned" actions once */
+ return;
+ }
+
+ /* if the port came back:
+ * 1/ presume every device came back
+ * 2/ force the next revalidation to check all expander phys
+ */
+ list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
+ int i, rc;
+
+ rc = sas_notify_lldd_dev_found(dev);
+ if (rc) {
+ sas_unregister_dev(port, dev);
+ sas_destruct_devices(port);
+ continue;
+ }
+
+ if (dev_is_expander(dev->dev_type)) {
+ dev->ex_dev.ex_change_count = -1;
+ for (i = 0; i < dev->ex_dev.num_phys; i++) {
+ struct ex_phy *phy = &dev->ex_dev.ex_phy[i];
+
+ phy->phy_change_count = -1;
+ }
+ }
+ }
+
+ sas_discover_event(port, DISCE_RESUME);
+}
+
+/**
+ * sas_form_port - add this phy to a port
+ * @phy: the phy of interest
+ *
+ * This function adds this phy to an existing port, thus creating a wide
+ * port, or it creates a port and adds the phy to the port.
+ */
+static void sas_form_port(struct asd_sas_phy *phy)
+{
+ int i;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct asd_sas_port *port = phy->port;
+ struct domain_device *port_dev;
+ struct sas_internal *si =
+ to_sas_internal(sas_ha->core.shost->transportt);
+ unsigned long flags;
+
+ if (port) {
+ if (!phy_is_wideport_member(port, phy))
+ sas_deform_port(phy, 0);
+ else if (phy->suspended) {
+ phy->suspended = 0;
+ sas_resume_port(phy);
+
+ /* phy came back, try to cancel the timeout */
+ wake_up(&sas_ha->eh_wait_q);
+ return;
+ } else {
+ pr_info("%s: phy%d belongs to port%d already(%d)!\n",
+ __func__, phy->id, phy->port->id,
+ phy->port->num_phys);
+ return;
+ }
+ }
+
+ /* see if the phy should be part of a wide port */
+ spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
+ for (i = 0; i < sas_ha->num_phys; i++) {
+ port = sas_ha->sas_port[i];
+ spin_lock(&port->phy_list_lock);
+ if (*(u64 *) port->sas_addr &&
+ phy_is_wideport_member(port, phy) && port->num_phys > 0) {
+ /* wide port */
+ pr_debug("phy%d matched wide port%d\n", phy->id,
+ port->id);
+ break;
+ }
+ spin_unlock(&port->phy_list_lock);
+ }
+ /* The phy does not match any existing port, create a new one */
+ if (i == sas_ha->num_phys) {
+ for (i = 0; i < sas_ha->num_phys; i++) {
+ port = sas_ha->sas_port[i];
+ spin_lock(&port->phy_list_lock);
+ if (*(u64 *)port->sas_addr == 0
+ && port->num_phys == 0) {
+ memcpy(port->sas_addr, phy->sas_addr,
+ SAS_ADDR_SIZE);
+ break;
+ }
+ spin_unlock(&port->phy_list_lock);
+ }
+ }
+
+ if (i >= sas_ha->num_phys) {
+ pr_err("%s: couldn't find a free port, bug?\n", __func__);
+ spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
+ return;
+ }
+
+ /* add the phy to the port */
+ port_dev = port->port_dev;
+ list_add_tail(&phy->port_phy_el, &port->phy_list);
+ sas_phy_set_target(phy, port_dev);
+ phy->port = port;
+ port->num_phys++;
+ port->phy_mask |= (1U << phy->id);
+
+ if (*(u64 *)port->attached_sas_addr == 0) {
+ port->class = phy->class;
+ memcpy(port->attached_sas_addr, phy->attached_sas_addr,
+ SAS_ADDR_SIZE);
+ port->iproto = phy->iproto;
+ port->tproto = phy->tproto;
+ port->oob_mode = phy->oob_mode;
+ port->linkrate = phy->linkrate;
+ } else
+ port->linkrate = max(port->linkrate, phy->linkrate);
+ spin_unlock(&port->phy_list_lock);
+ spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
+
+ if (!port->port) {
+ port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
+ BUG_ON(!port->port);
+ sas_port_add(port->port);
+ }
+ sas_port_add_phy(port->port, phy->phy);
+
+ pr_debug("%s added to %s, phy_mask:0x%x (%16llx)\n",
+ dev_name(&phy->phy->dev), dev_name(&port->port->dev),
+ port->phy_mask,
+ SAS_ADDR(port->attached_sas_addr));
+
+ if (port_dev)
+ port_dev->pathways = port->num_phys;
+
+ /* Tell the LLDD about this port formation. */
+ if (si->dft->lldd_port_formed)
+ si->dft->lldd_port_formed(phy);
+
+ sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
+ /* Only insert a revalidate event after initial discovery */
+ if (port_dev && dev_is_expander(port_dev->dev_type)) {
+ struct expander_device *ex_dev = &port_dev->ex_dev;
+
+ ex_dev->ex_change_count = -1;
+ sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
+ }
+ flush_workqueue(sas_ha->disco_q);
+}
+
+/**
+ * sas_deform_port - remove this phy from the port it belongs to
+ * @phy: the phy of interest
+ * @gone: whether or not the PHY is gone
+ *
+ * This is called when the physical link to the other phy has been
+ * lost (on this phy), in Event thread context. We cannot delay here.
+ */
+void sas_deform_port(struct asd_sas_phy *phy, int gone)
+{
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct asd_sas_port *port = phy->port;
+ struct sas_internal *si =
+ to_sas_internal(sas_ha->core.shost->transportt);
+ struct domain_device *dev;
+ unsigned long flags;
+
+ if (!port)
+ return; /* done by a phy event */
+
+ dev = port->port_dev;
+ if (dev)
+ dev->pathways--;
+
+ if (port->num_phys == 1) {
+ sas_unregister_domain_devices(port, gone);
+ sas_destruct_devices(port);
+ sas_port_delete(port->port);
+ port->port = NULL;
+ } else {
+ sas_port_delete_phy(port->port, phy->phy);
+ sas_device_set_phy(dev, port->port);
+ }
+
+ if (si->dft->lldd_port_deformed)
+ si->dft->lldd_port_deformed(phy);
+
+ spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
+ spin_lock(&port->phy_list_lock);
+
+ list_del_init(&phy->port_phy_el);
+ sas_phy_set_target(phy, NULL);
+ phy->port = NULL;
+ port->num_phys--;
+ port->phy_mask &= ~(1U << phy->id);
+
+ if (port->num_phys == 0) {
+ INIT_LIST_HEAD(&port->phy_list);
+ memset(port->sas_addr, 0, SAS_ADDR_SIZE);
+ memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
+ port->class = 0;
+ port->iproto = 0;
+ port->tproto = 0;
+ port->oob_mode = 0;
+ port->phy_mask = 0;
+ }
+ spin_unlock(&port->phy_list_lock);
+ spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
+
+ /* Only insert revalidate event if the port still has members */
+ if (port->port && dev && dev_is_expander(dev->dev_type)) {
+ struct expander_device *ex_dev = &dev->ex_dev;
+
+ ex_dev->ex_change_count = -1;
+ sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
+ }
+ flush_workqueue(sas_ha->disco_q);
+
+ return;
+}
+
+/* ---------- SAS port events ---------- */
+
+void sas_porte_bytes_dmaed(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ sas_form_port(phy);
+}
+
+void sas_porte_broadcast_rcvd(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ unsigned long flags;
+ u32 prim;
+
+ spin_lock_irqsave(&phy->sas_prim_lock, flags);
+ prim = phy->sas_prim;
+ spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
+
+ pr_debug("broadcast received: %d\n", prim);
+ sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
+
+ if (phy->port)
+ flush_workqueue(phy->port->ha->disco_q);
+}
+
+void sas_porte_link_reset_err(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ sas_deform_port(phy, 1);
+}
+
+void sas_porte_timer_event(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ sas_deform_port(phy, 1);
+}
+
+void sas_porte_hard_reset(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ sas_deform_port(phy, 1);
+}
+
+/* ---------- SAS port registration ---------- */
+
+static void sas_init_port(struct asd_sas_port *port,
+ struct sas_ha_struct *sas_ha, int i)
+{
+ memset(port, 0, sizeof(*port));
+ port->id = i;
+ INIT_LIST_HEAD(&port->dev_list);
+ INIT_LIST_HEAD(&port->disco_list);
+ INIT_LIST_HEAD(&port->destroy_list);
+ INIT_LIST_HEAD(&port->sas_port_del_list);
+ spin_lock_init(&port->phy_list_lock);
+ INIT_LIST_HEAD(&port->phy_list);
+ port->ha = sas_ha;
+
+ spin_lock_init(&port->dev_list_lock);
+}
+
+int sas_register_ports(struct sas_ha_struct *sas_ha)
+{
+ int i;
+
+ /* initialize the ports and discovery */
+ for (i = 0; i < sas_ha->num_phys; i++) {
+ struct asd_sas_port *port = sas_ha->sas_port[i];
+
+ sas_init_port(port, sas_ha, i);
+ sas_init_disc(&port->disc, port);
+ }
+ return 0;
+}
+
+void sas_unregister_ports(struct sas_ha_struct *sas_ha)
+{
+ int i;
+
+ for (i = 0; i < sas_ha->num_phys; i++)
+ if (sas_ha->sas_phy[i]->port)
+ sas_deform_port(sas_ha->sas_phy[i], 0);
+
+}
+
+const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
+ [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
+ [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
+ [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
+ [PORTE_TIMER_EVENT] = sas_porte_timer_event,
+ [PORTE_HARD_RESET] = sas_porte_hard_reset,
+};