351 lines
7.9 KiB
C
351 lines
7.9 KiB
C
/*
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* driver for Microsemi PQI-based storage controllers
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* Copyright (c) 2016-2017 Microsemi Corporation
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* Copyright (c) 2016 PMC-Sierra, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more details.
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*
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* Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
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*
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*/
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#include <linux/kernel.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_transport_sas.h>
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#include "smartpqi.h"
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static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port)
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{
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struct pqi_sas_phy *pqi_sas_phy;
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struct sas_phy *phy;
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pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL);
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if (!pqi_sas_phy)
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return NULL;
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phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
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pqi_sas_port->next_phy_index);
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if (!phy) {
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kfree(pqi_sas_phy);
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return NULL;
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}
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pqi_sas_port->next_phy_index++;
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pqi_sas_phy->phy = phy;
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pqi_sas_phy->parent_port = pqi_sas_port;
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return pqi_sas_phy;
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}
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static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
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{
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struct sas_phy *phy = pqi_sas_phy->phy;
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sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
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sas_phy_free(phy);
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if (pqi_sas_phy->added_to_port)
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list_del(&pqi_sas_phy->phy_list_entry);
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kfree(pqi_sas_phy);
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}
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static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
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{
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int rc;
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struct pqi_sas_port *pqi_sas_port;
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struct sas_phy *phy;
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struct sas_identify *identify;
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pqi_sas_port = pqi_sas_phy->parent_port;
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phy = pqi_sas_phy->phy;
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identify = &phy->identify;
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memset(identify, 0, sizeof(*identify));
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identify->sas_address = pqi_sas_port->sas_address;
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identify->device_type = SAS_END_DEVICE;
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identify->initiator_port_protocols = SAS_PROTOCOL_STP;
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identify->target_port_protocols = SAS_PROTOCOL_STP;
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phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
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phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
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phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
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phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
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phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
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rc = sas_phy_add(pqi_sas_phy->phy);
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if (rc)
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return rc;
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sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
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list_add_tail(&pqi_sas_phy->phy_list_entry,
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&pqi_sas_port->phy_list_head);
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pqi_sas_phy->added_to_port = true;
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return 0;
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}
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static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
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struct sas_rphy *rphy)
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{
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struct sas_identify *identify;
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identify = &rphy->identify;
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identify->sas_address = pqi_sas_port->sas_address;
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identify->initiator_port_protocols = SAS_PROTOCOL_STP;
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identify->target_port_protocols = SAS_PROTOCOL_STP;
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return sas_rphy_add(rphy);
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}
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static struct pqi_sas_port *pqi_alloc_sas_port(
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struct pqi_sas_node *pqi_sas_node, u64 sas_address)
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{
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int rc;
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struct pqi_sas_port *pqi_sas_port;
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struct sas_port *port;
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pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL);
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if (!pqi_sas_port)
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return NULL;
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INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
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pqi_sas_port->parent_node = pqi_sas_node;
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port = sas_port_alloc_num(pqi_sas_node->parent_dev);
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if (!port)
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goto free_pqi_port;
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rc = sas_port_add(port);
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if (rc)
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goto free_sas_port;
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pqi_sas_port->port = port;
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pqi_sas_port->sas_address = sas_address;
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list_add_tail(&pqi_sas_port->port_list_entry,
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&pqi_sas_node->port_list_head);
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return pqi_sas_port;
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free_sas_port:
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sas_port_free(port);
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free_pqi_port:
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kfree(pqi_sas_port);
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return NULL;
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}
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static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
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{
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struct pqi_sas_phy *pqi_sas_phy;
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struct pqi_sas_phy *next;
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list_for_each_entry_safe(pqi_sas_phy, next,
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&pqi_sas_port->phy_list_head, phy_list_entry)
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pqi_free_sas_phy(pqi_sas_phy);
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sas_port_delete(pqi_sas_port->port);
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list_del(&pqi_sas_port->port_list_entry);
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kfree(pqi_sas_port);
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}
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static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev)
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{
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struct pqi_sas_node *pqi_sas_node;
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pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL);
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if (pqi_sas_node) {
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pqi_sas_node->parent_dev = parent_dev;
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INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
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}
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return pqi_sas_node;
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}
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static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
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{
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struct pqi_sas_port *pqi_sas_port;
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struct pqi_sas_port *next;
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if (!pqi_sas_node)
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return;
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list_for_each_entry_safe(pqi_sas_port, next,
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&pqi_sas_node->port_list_head, port_list_entry)
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pqi_free_sas_port(pqi_sas_port);
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kfree(pqi_sas_node);
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}
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struct pqi_scsi_dev *pqi_find_device_by_sas_rphy(
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struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy)
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{
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struct pqi_scsi_dev *device;
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list_for_each_entry(device, &ctrl_info->scsi_device_list,
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scsi_device_list_entry) {
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if (!device->sas_port)
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continue;
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if (device->sas_port->rphy == rphy)
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return device;
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}
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return NULL;
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}
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int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info)
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{
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int rc;
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struct device *parent_dev;
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struct pqi_sas_node *pqi_sas_node;
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struct pqi_sas_port *pqi_sas_port;
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struct pqi_sas_phy *pqi_sas_phy;
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parent_dev = &shost->shost_gendev;
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pqi_sas_node = pqi_alloc_sas_node(parent_dev);
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if (!pqi_sas_node)
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return -ENOMEM;
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pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, ctrl_info->sas_address);
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if (!pqi_sas_port) {
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rc = -ENODEV;
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goto free_sas_node;
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}
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pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
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if (!pqi_sas_phy) {
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rc = -ENODEV;
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goto free_sas_port;
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}
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rc = pqi_sas_port_add_phy(pqi_sas_phy);
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if (rc)
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goto free_sas_phy;
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ctrl_info->sas_host = pqi_sas_node;
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return 0;
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free_sas_phy:
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pqi_free_sas_phy(pqi_sas_phy);
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free_sas_port:
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pqi_free_sas_port(pqi_sas_port);
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free_sas_node:
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pqi_free_sas_node(pqi_sas_node);
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return rc;
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}
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void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
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{
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pqi_free_sas_node(ctrl_info->sas_host);
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}
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int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
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struct pqi_scsi_dev *device)
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{
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int rc;
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struct pqi_sas_port *pqi_sas_port;
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struct sas_rphy *rphy;
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pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, device->sas_address);
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if (!pqi_sas_port)
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return -ENOMEM;
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rphy = sas_end_device_alloc(pqi_sas_port->port);
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if (!rphy) {
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rc = -ENODEV;
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goto free_sas_port;
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}
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pqi_sas_port->rphy = rphy;
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device->sas_port = pqi_sas_port;
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rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
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if (rc)
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goto free_sas_port;
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return 0;
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free_sas_port:
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pqi_free_sas_port(pqi_sas_port);
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device->sas_port = NULL;
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return rc;
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}
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void pqi_remove_sas_device(struct pqi_scsi_dev *device)
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{
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if (device->sas_port) {
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pqi_free_sas_port(device->sas_port);
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device->sas_port = NULL;
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}
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}
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static int pqi_sas_get_linkerrors(struct sas_phy *phy)
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{
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return 0;
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}
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static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
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u64 *identifier)
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{
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return 0;
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}
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static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
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{
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return -ENXIO;
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}
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static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
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{
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return 0;
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}
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static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
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{
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return 0;
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}
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static int pqi_sas_phy_setup(struct sas_phy *phy)
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{
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return 0;
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}
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static void pqi_sas_phy_release(struct sas_phy *phy)
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{
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}
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static int pqi_sas_phy_speed(struct sas_phy *phy,
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struct sas_phy_linkrates *rates)
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{
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return -EINVAL;
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}
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/* SMP = Serial Management Protocol */
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static int pqi_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
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struct request *req)
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{
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return -EINVAL;
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}
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struct sas_function_template pqi_sas_transport_functions = {
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.get_linkerrors = pqi_sas_get_linkerrors,
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.get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
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.get_bay_identifier = pqi_sas_get_bay_identifier,
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.phy_reset = pqi_sas_phy_reset,
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.phy_enable = pqi_sas_phy_enable,
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.phy_setup = pqi_sas_phy_setup,
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.phy_release = pqi_sas_phy_release,
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.set_phy_speed = pqi_sas_phy_speed,
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.smp_handler = pqi_sas_smp_handler,
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};
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