586 lines
14 KiB
C
586 lines
14 KiB
C
/*
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* driver for Microchip PQI-based storage controllers
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* Copyright (c) 2019-2021 Microchip Technology Inc. and its subsidiaries
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* Copyright (c) 2016-2018 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 storagedev@microchip.com
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*
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*/
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#include <linux/kernel.h>
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#include <linux/bsg-lib.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 <asm/unaligned.h>
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#include "smartpqi.h"
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#include "smartpqi_kernel_compat.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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if (pqi_sas_phy->added_to_port)
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list_del(&pqi_sas_phy->phy_list_entry);
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sas_phy_delete(phy);
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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_ALL;
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identify->target_port_protocols = SAS_PROTOCOL_ALL;
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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->phy_identifier = pqi_sas_port->device->phy_id;
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identify->initiator_port_protocols = SAS_PROTOCOL_ALL;
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identify->target_port_protocols = SAS_PROTOCOL_STP;
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if (pqi_sas_port->device) {
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switch (pqi_sas_port->device->device_type) {
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case SA_DEVICE_TYPE_SAS:
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case SA_DEVICE_TYPE_SES:
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case SA_DEVICE_TYPE_NVME:
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identify->target_port_protocols = SAS_PROTOCOL_SSP;
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break;
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case SA_DEVICE_TYPE_EXPANDER_SMP:
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identify->target_port_protocols = SAS_PROTOCOL_SMP;
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break;
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case SA_DEVICE_TYPE_SATA:
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default:
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break;
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}
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}
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return sas_rphy_add(rphy);
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}
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static struct sas_rphy *pqi_sas_rphy_alloc(struct pqi_sas_port *pqi_sas_port)
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{
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if (pqi_sas_port->device && pqi_sas_port->device->is_expander_smp_device)
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return sas_expander_alloc(pqi_sas_port->port,
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SAS_FANOUT_EXPANDER_DEVICE);
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return sas_end_device_alloc(pqi_sas_port->port);
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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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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_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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pqi_sas_port->device = device;
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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_dev;
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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,
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ctrl_info->sas_address, NULL);
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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,
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device->sas_address, device);
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if (!pqi_sas_port)
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return -ENOMEM;
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rphy = pqi_sas_rphy_alloc(pqi_sas_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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int rc;
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unsigned long flags;
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struct Scsi_Host *shost;
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struct pqi_ctrl_info *ctrl_info;
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struct pqi_scsi_dev *found_device;
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struct pqi_scsi_dev *device;
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if (!rphy)
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return -ENODEV;
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shost = rphy_to_shost(rphy);
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ctrl_info = shost_to_hba(shost);
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spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
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found_device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
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if (!found_device) {
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rc = -ENODEV;
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goto out;
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}
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if (found_device->devtype == TYPE_ENCLOSURE) {
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*identifier = get_unaligned_be64(&found_device->wwid);
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rc = 0;
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goto out;
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}
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if (found_device->box_index == 0xff ||
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found_device->phys_box_on_bus == 0 ||
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found_device->bay == 0xff) {
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rc = -EINVAL;
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goto out;
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}
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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->devtype == TYPE_ENCLOSURE &&
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device->box_index == found_device->box_index &&
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device->phys_box_on_bus ==
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found_device->phys_box_on_bus &&
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memcmp(device->phys_connector,
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found_device->phys_connector, 2) == 0) {
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*identifier =
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get_unaligned_be64(&device->wwid);
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rc = 0;
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goto out;
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}
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}
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if (found_device->phy_connected_dev_type != SA_DEVICE_TYPE_CONTROLLER) {
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rc = -EINVAL;
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goto out;
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}
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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->devtype == TYPE_ENCLOSURE &&
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CISS_GET_DRIVE_NUMBER(device->scsi3addr) ==
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PQI_VSEP_CISS_BTL) {
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*identifier = get_unaligned_be64(&device->wwid);
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rc = 0;
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goto out;
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}
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}
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rc = -EINVAL;
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out:
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spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
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return rc;
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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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int rc;
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unsigned long flags;
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struct pqi_ctrl_info *ctrl_info;
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struct pqi_scsi_dev *device;
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struct Scsi_Host *shost;
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if (!rphy)
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return -ENODEV;
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shost = rphy_to_shost(rphy);
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ctrl_info = shost_to_hba(shost);
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spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
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device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
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if (!device) {
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rc = -ENODEV;
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goto out;
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}
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if (device->bay == 0xff)
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rc = -EINVAL;
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else
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rc = device->bay;
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out:
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spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
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return rc;
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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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#define CSMI_IOCTL_TIMEOUT 60
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#define SMP_CRC_FIELD_LENGTH 4
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static struct bmic_csmi_smp_passthru_buffer *
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pqi_build_csmi_smp_passthru_buffer(struct sas_rphy *rphy,
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struct bsg_job *job)
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{
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struct bmic_csmi_smp_passthru_buffer *smp_buf;
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struct bmic_csmi_ioctl_header *ioctl_header;
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struct bmic_csmi_smp_passthru *parameters;
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u32 req_size;
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u32 resp_size;
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smp_buf = kzalloc(sizeof(*smp_buf), GFP_KERNEL);
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if (!smp_buf)
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return NULL;
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req_size = job->request_payload.payload_len;
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resp_size = job->reply_payload.payload_len;
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ioctl_header = &smp_buf->ioctl_header;
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put_unaligned_le32(sizeof(smp_buf->ioctl_header),
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&ioctl_header->header_length);
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put_unaligned_le32(CSMI_IOCTL_TIMEOUT, &ioctl_header->timeout);
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put_unaligned_le32(CSMI_CC_SAS_SMP_PASSTHRU,
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&ioctl_header->control_code);
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put_unaligned_le32(sizeof(smp_buf->parameters), &ioctl_header->length);
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parameters = &smp_buf->parameters;
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parameters->phy_identifier = rphy->identify.phy_identifier;
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parameters->port_identifier = 0;
|
|
parameters->connection_rate = 0;
|
|
put_unaligned_be64(rphy->identify.sas_address,
|
|
¶meters->destination_sas_address);
|
|
|
|
if (req_size > SMP_CRC_FIELD_LENGTH)
|
|
req_size -= SMP_CRC_FIELD_LENGTH;
|
|
|
|
put_unaligned_le32(req_size, ¶meters->request_length);
|
|
put_unaligned_le32(resp_size, ¶meters->response_length);
|
|
|
|
sg_copy_to_buffer(job->request_payload.sg_list,
|
|
job->reply_payload.sg_cnt, ¶meters->request,
|
|
req_size);
|
|
|
|
return smp_buf;
|
|
}
|
|
|
|
static unsigned int pqi_build_sas_smp_handler_reply(
|
|
struct bmic_csmi_smp_passthru_buffer *smp_buf, struct bsg_job *job,
|
|
struct pqi_raid_error_info *error_info)
|
|
{
|
|
sg_copy_from_buffer(job->reply_payload.sg_list,
|
|
job->reply_payload.sg_cnt, &smp_buf->parameters.response,
|
|
le32_to_cpu(smp_buf->parameters.response_length));
|
|
|
|
job->reply_len = le16_to_cpu(error_info->sense_data_length);
|
|
memcpy(job->reply, error_info->data,
|
|
le16_to_cpu(error_info->sense_data_length));
|
|
|
|
return job->reply_payload.payload_len -
|
|
get_unaligned_le32(&error_info->data_in_transferred);
|
|
}
|
|
|
|
void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
|
|
struct sas_rphy *rphy)
|
|
{
|
|
int rc;
|
|
struct pqi_ctrl_info *ctrl_info;
|
|
struct bmic_csmi_smp_passthru_buffer *smp_buf;
|
|
struct pqi_raid_error_info error_info;
|
|
unsigned int reslen = 0;
|
|
|
|
ctrl_info = shost_to_hba(shost);
|
|
|
|
if (job->reply_payload.payload_len == 0) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
if (!rphy) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (rphy->identify.device_type != SAS_FANOUT_EXPANDER_DEVICE) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (job->request_payload.sg_cnt > 1 || job->reply_payload.sg_cnt > 1) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
smp_buf = pqi_build_csmi_smp_passthru_buffer(rphy, job);
|
|
if (!smp_buf) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
rc = pqi_csmi_smp_passthru(ctrl_info, smp_buf, sizeof(*smp_buf),
|
|
&error_info);
|
|
if (rc)
|
|
goto out;
|
|
|
|
reslen = pqi_build_sas_smp_handler_reply(smp_buf, job, &error_info);
|
|
|
|
out:
|
|
pqi_bsg_job_done(job, rc, reslen);
|
|
}
|
|
|
|
struct sas_function_template pqi_sas_transport_functions = {
|
|
.get_linkerrors = pqi_sas_get_linkerrors,
|
|
.get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
|
|
.get_bay_identifier = pqi_sas_get_bay_identifier,
|
|
.phy_reset = pqi_sas_phy_reset,
|
|
.phy_enable = pqi_sas_phy_enable,
|
|
.phy_setup = pqi_sas_phy_setup,
|
|
.phy_release = pqi_sas_phy_release,
|
|
.set_phy_speed = pqi_sas_phy_speed,
|
|
.smp_handler = PQI_SAS_SMP_HANDLER,
|
|
};
|
|
|