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-rw-r--r--drivers/scsi/libsas/sas_phy.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_phy.c b/drivers/scsi/libsas/sas_phy.c
new file mode 100644
index 000000000..a0d592d11
--- /dev/null
+++ b/drivers/scsi/libsas/sas_phy.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Serial Attached SCSI (SAS) Phy 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_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_sas.h>
+#include "scsi_sas_internal.h"
+
+/* ---------- Phy events ---------- */
+
+static void sas_phye_loss_of_signal(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ phy->error = 0;
+ sas_deform_port(phy, 1);
+}
+
+static void sas_phye_oob_done(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ phy->error = 0;
+}
+
+static void sas_phye_oob_error(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct asd_sas_port *port = phy->port;
+ struct sas_internal *i =
+ to_sas_internal(sas_ha->core.shost->transportt);
+
+ sas_deform_port(phy, 1);
+
+ if (!port && phy->enabled && i->dft->lldd_control_phy) {
+ phy->error++;
+ switch (phy->error) {
+ case 1:
+ case 2:
+ i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
+ NULL);
+ break;
+ case 3:
+ default:
+ phy->error = 0;
+ phy->enabled = 0;
+ i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
+ break;
+ }
+ }
+}
+
+static void sas_phye_spinup_hold(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct sas_internal *i =
+ to_sas_internal(sas_ha->core.shost->transportt);
+
+ phy->error = 0;
+ i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
+}
+
+static void sas_phye_resume_timeout(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+
+ /* phew, lldd got the phy back in the nick of time */
+ if (!phy->suspended) {
+ dev_info(&phy->phy->dev, "resume timeout cancelled\n");
+ return;
+ }
+
+ phy->error = 0;
+ phy->suspended = 0;
+ sas_deform_port(phy, 1);
+}
+
+
+static void sas_phye_shutdown(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct sas_internal *i =
+ to_sas_internal(sas_ha->core.shost->transportt);
+
+ if (phy->enabled) {
+ int ret;
+
+ phy->error = 0;
+ phy->enabled = 0;
+ ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
+ if (ret)
+ pr_notice("lldd disable phy%d returned %d\n", phy->id,
+ ret);
+ } else
+ pr_notice("phy%d is not enabled, cannot shutdown\n", phy->id);
+ phy->in_shutdown = 0;
+}
+
+/* ---------- Phy class registration ---------- */
+
+int sas_register_phys(struct sas_ha_struct *sas_ha)
+{
+ int i;
+
+ /* Now register the phys. */
+ for (i = 0; i < sas_ha->num_phys; i++) {
+ struct asd_sas_phy *phy = sas_ha->sas_phy[i];
+
+ phy->error = 0;
+ atomic_set(&phy->event_nr, 0);
+ INIT_LIST_HEAD(&phy->port_phy_el);
+
+ phy->port = NULL;
+ phy->ha = sas_ha;
+ spin_lock_init(&phy->frame_rcvd_lock);
+ spin_lock_init(&phy->sas_prim_lock);
+ phy->frame_rcvd_size = 0;
+
+ phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i);
+ if (!phy->phy)
+ return -ENOMEM;
+
+ phy->phy->identify.initiator_port_protocols =
+ phy->iproto;
+ phy->phy->identify.target_port_protocols = phy->tproto;
+ phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
+ phy->phy->identify.phy_identifier = i;
+ phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
+ phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
+ phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
+ phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
+ phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
+
+ sas_phy_add(phy->phy);
+ }
+
+ return 0;
+}
+
+const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
+ [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
+ [PHYE_OOB_DONE] = sas_phye_oob_done,
+ [PHYE_OOB_ERROR] = sas_phye_oob_error,
+ [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
+ [PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout,
+ [PHYE_SHUTDOWN] = sas_phye_shutdown,
+};