mirror of https://gitee.com/openkylin/linux.git
566 lines
15 KiB
C
566 lines
15 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/firmware.h>
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#include <linux/efi.h>
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#include <asm/string.h>
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#include "isci.h"
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#include "task.h"
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#include "probe_roms.h"
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static struct scsi_transport_template *isci_transport_template;
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static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
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{ PCI_VDEVICE(INTEL, 0x1D61),},
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{ PCI_VDEVICE(INTEL, 0x1D63),},
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{ PCI_VDEVICE(INTEL, 0x1D65),},
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{ PCI_VDEVICE(INTEL, 0x1D67),},
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{ PCI_VDEVICE(INTEL, 0x1D69),},
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{ PCI_VDEVICE(INTEL, 0x1D6B),},
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{ PCI_VDEVICE(INTEL, 0x1D60),},
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{ PCI_VDEVICE(INTEL, 0x1D62),},
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{ PCI_VDEVICE(INTEL, 0x1D64),},
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{ PCI_VDEVICE(INTEL, 0x1D66),},
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{ PCI_VDEVICE(INTEL, 0x1D68),},
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{ PCI_VDEVICE(INTEL, 0x1D6A),},
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{}
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};
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MODULE_DEVICE_TABLE(pci, isci_id_table);
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/* linux isci specific settings */
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unsigned char no_outbound_task_to = 20;
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module_param(no_outbound_task_to, byte, 0);
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MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
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u16 ssp_max_occ_to = 20;
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module_param(ssp_max_occ_to, ushort, 0);
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MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
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u16 stp_max_occ_to = 5;
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module_param(stp_max_occ_to, ushort, 0);
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MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
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u16 ssp_inactive_to = 5;
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module_param(ssp_inactive_to, ushort, 0);
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MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
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u16 stp_inactive_to = 5;
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module_param(stp_inactive_to, ushort, 0);
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MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
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unsigned char phy_gen = 3;
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module_param(phy_gen, byte, 0);
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MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
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unsigned char max_concurr_spinup = 1;
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module_param(max_concurr_spinup, byte, 0);
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MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
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static struct scsi_host_template isci_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.proc_name = DRV_NAME,
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.queuecommand = sas_queuecommand,
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.target_alloc = sas_target_alloc,
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.slave_configure = sas_slave_configure,
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.slave_destroy = sas_slave_destroy,
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.scan_finished = isci_host_scan_finished,
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.scan_start = isci_host_scan_start,
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.change_queue_depth = sas_change_queue_depth,
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.change_queue_type = sas_change_queue_type,
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.bios_param = sas_bios_param,
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.can_queue = ISCI_CAN_QUEUE_VAL,
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.cmd_per_lun = 1,
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.this_id = -1,
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.sg_tablesize = SG_ALL,
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.max_sectors = SCSI_DEFAULT_MAX_SECTORS,
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.use_clustering = ENABLE_CLUSTERING,
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.eh_device_reset_handler = sas_eh_device_reset_handler,
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.eh_bus_reset_handler = isci_bus_reset_handler,
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.slave_alloc = sas_slave_alloc,
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.target_destroy = sas_target_destroy,
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.ioctl = sas_ioctl,
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};
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static struct sas_domain_function_template isci_transport_ops = {
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/* The class calls these to notify the LLDD of an event. */
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.lldd_port_formed = isci_port_formed,
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.lldd_port_deformed = isci_port_deformed,
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/* The class calls these when a device is found or gone. */
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.lldd_dev_found = isci_remote_device_found,
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.lldd_dev_gone = isci_remote_device_gone,
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.lldd_execute_task = isci_task_execute_task,
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/* Task Management Functions. Must be called from process context. */
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.lldd_abort_task = isci_task_abort_task,
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.lldd_abort_task_set = isci_task_abort_task_set,
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.lldd_clear_aca = isci_task_clear_aca,
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.lldd_clear_task_set = isci_task_clear_task_set,
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.lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
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.lldd_lu_reset = isci_task_lu_reset,
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.lldd_query_task = isci_task_query_task,
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/* Port and Adapter management */
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.lldd_clear_nexus_port = isci_task_clear_nexus_port,
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.lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
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/* Phy management */
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.lldd_control_phy = isci_phy_control,
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};
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/******************************************************************************
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* P R O T E C T E D M E T H O D S
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******************************************************************************/
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/**
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* isci_register_sas_ha() - This method initializes various lldd
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* specific members of the sas_ha struct and calls the libsas
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* sas_register_ha() function.
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* @isci_host: This parameter specifies the lldd specific wrapper for the
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* libsas sas_ha struct.
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*
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* This method returns an error code indicating sucess or failure. The user
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* should check for possible memory allocation error return otherwise, a zero
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* indicates success.
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*/
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static int isci_register_sas_ha(struct isci_host *isci_host)
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{
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int i;
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struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
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struct asd_sas_phy **sas_phys;
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struct asd_sas_port **sas_ports;
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sas_phys = devm_kzalloc(&isci_host->pdev->dev,
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SCI_MAX_PHYS * sizeof(void *),
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GFP_KERNEL);
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if (!sas_phys)
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return -ENOMEM;
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sas_ports = devm_kzalloc(&isci_host->pdev->dev,
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SCI_MAX_PORTS * sizeof(void *),
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GFP_KERNEL);
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if (!sas_ports)
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return -ENOMEM;
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/*----------------- Libsas Initialization Stuff----------------------
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* Set various fields in the sas_ha struct:
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*/
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sas_ha->sas_ha_name = DRV_NAME;
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sas_ha->lldd_module = THIS_MODULE;
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sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
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/* set the array of phy and port structs. */
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for (i = 0; i < SCI_MAX_PHYS; i++) {
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sas_phys[i] = &isci_host->phys[i].sas_phy;
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sas_ports[i] = &isci_host->ports[i].sas_port;
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}
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sas_ha->sas_phy = sas_phys;
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sas_ha->sas_port = sas_ports;
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sas_ha->num_phys = SCI_MAX_PHYS;
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sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL;
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sas_ha->lldd_max_execute_num = 1;
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sas_ha->strict_wide_ports = 1;
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sas_register_ha(sas_ha);
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return 0;
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}
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static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
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struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
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struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
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return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
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}
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static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
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static void isci_unregister(struct isci_host *isci_host)
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{
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struct Scsi_Host *shost;
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if (!isci_host)
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return;
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shost = isci_host->shost;
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device_remove_file(&shost->shost_dev, &dev_attr_isci_id);
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sas_unregister_ha(&isci_host->sas_ha);
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sas_remove_host(isci_host->shost);
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scsi_remove_host(isci_host->shost);
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scsi_host_put(isci_host->shost);
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}
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static int __devinit isci_pci_init(struct pci_dev *pdev)
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{
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int err, bar_num, bar_mask = 0;
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void __iomem * const *iomap;
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err = pcim_enable_device(pdev);
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if (err) {
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dev_err(&pdev->dev,
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"failed enable PCI device %s!\n",
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pci_name(pdev));
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return err;
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}
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for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
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bar_mask |= 1 << (bar_num * 2);
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err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
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if (err)
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return err;
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iomap = pcim_iomap_table(pdev);
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if (!iomap)
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return -ENOMEM;
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pci_set_master(pdev);
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err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
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if (err) {
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err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
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if (err)
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return err;
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}
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err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
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if (err) {
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err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
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if (err)
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return err;
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}
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return 0;
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}
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static int num_controllers(struct pci_dev *pdev)
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{
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/* bar size alone can tell us if we are running with a dual controller
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* part, no need to trust revision ids that might be under broken firmware
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* control
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*/
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resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
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resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
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if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
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smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
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return SCI_MAX_CONTROLLERS;
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else
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return 1;
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}
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static int isci_setup_interrupts(struct pci_dev *pdev)
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{
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int err, i, num_msix;
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struct isci_host *ihost;
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struct isci_pci_info *pci_info = to_pci_info(pdev);
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/*
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* Determine the number of vectors associated with this
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* PCI function.
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*/
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num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
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for (i = 0; i < num_msix; i++)
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pci_info->msix_entries[i].entry = i;
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err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix);
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if (err)
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goto intx;
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for (i = 0; i < num_msix; i++) {
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int id = i / SCI_NUM_MSI_X_INT;
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struct msix_entry *msix = &pci_info->msix_entries[i];
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irq_handler_t isr;
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ihost = pci_info->hosts[id];
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/* odd numbered vectors are error interrupts */
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if (i & 1)
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isr = isci_error_isr;
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else
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isr = isci_msix_isr;
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err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
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DRV_NAME"-msix", ihost);
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if (!err)
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continue;
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dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
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while (i--) {
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id = i / SCI_NUM_MSI_X_INT;
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ihost = pci_info->hosts[id];
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msix = &pci_info->msix_entries[i];
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devm_free_irq(&pdev->dev, msix->vector, ihost);
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}
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pci_disable_msix(pdev);
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goto intx;
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}
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return 0;
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intx:
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for_each_isci_host(i, ihost, pdev) {
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err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
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IRQF_SHARED, DRV_NAME"-intx", ihost);
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if (err)
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break;
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}
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return err;
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}
|
|
|
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static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
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{
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struct isci_host *isci_host;
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struct Scsi_Host *shost;
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int err;
|
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|
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isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL);
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if (!isci_host)
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return NULL;
|
|
|
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isci_host->pdev = pdev;
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isci_host->id = id;
|
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|
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shost = scsi_host_alloc(&isci_sht, sizeof(void *));
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if (!shost)
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return NULL;
|
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isci_host->shost = shost;
|
|
|
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err = isci_host_init(isci_host);
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if (err)
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goto err_shost;
|
|
|
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SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha;
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isci_host->sas_ha.core.shost = shost;
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shost->transportt = isci_transport_template;
|
|
|
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shost->max_id = ~0;
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shost->max_lun = ~0;
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shost->max_cmd_len = MAX_COMMAND_SIZE;
|
|
|
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err = scsi_add_host(shost, &pdev->dev);
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if (err)
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goto err_shost;
|
|
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err = isci_register_sas_ha(isci_host);
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if (err)
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goto err_shost_remove;
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|
|
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err = device_create_file(&shost->shost_dev, &dev_attr_isci_id);
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if (err)
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goto err_unregister_ha;
|
|
|
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return isci_host;
|
|
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err_unregister_ha:
|
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sas_unregister_ha(&(isci_host->sas_ha));
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err_shost_remove:
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scsi_remove_host(shost);
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err_shost:
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scsi_host_put(shost);
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return NULL;
|
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}
|
|
|
|
static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
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struct isci_pci_info *pci_info;
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int err, i;
|
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struct isci_host *isci_host;
|
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const struct firmware *fw = NULL;
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struct isci_orom *orom = NULL;
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char *source = "(platform)";
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|
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dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
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pdev->revision);
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|
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pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
|
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if (!pci_info)
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return -ENOMEM;
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pci_set_drvdata(pdev, pci_info);
|
|
|
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if (efi_enabled)
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orom = isci_get_efi_var(pdev);
|
|
|
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if (!orom)
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orom = isci_request_oprom(pdev);
|
|
|
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for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) {
|
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if (sci_oem_parameters_validate(&orom->ctrl[i])) {
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dev_warn(&pdev->dev,
|
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"[%d]: invalid oem parameters detected, falling back to firmware\n", i);
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devm_kfree(&pdev->dev, orom);
|
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orom = NULL;
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break;
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}
|
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}
|
|
|
|
if (!orom) {
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source = "(firmware)";
|
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orom = isci_request_firmware(pdev, fw);
|
|
if (!orom) {
|
|
/* TODO convert this to WARN_TAINT_ONCE once the
|
|
* orom/efi parameter support is widely available
|
|
*/
|
|
dev_warn(&pdev->dev,
|
|
"Loading user firmware failed, using default "
|
|
"values\n");
|
|
dev_warn(&pdev->dev,
|
|
"Default OEM configuration being used: 4 "
|
|
"narrow ports, and default SAS Addresses\n");
|
|
}
|
|
}
|
|
|
|
if (orom)
|
|
dev_info(&pdev->dev,
|
|
"OEM SAS parameters (version: %u.%u) loaded %s\n",
|
|
(orom->hdr.version & 0xf0) >> 4,
|
|
(orom->hdr.version & 0xf), source);
|
|
|
|
pci_info->orom = orom;
|
|
|
|
err = isci_pci_init(pdev);
|
|
if (err)
|
|
return err;
|
|
|
|
for (i = 0; i < num_controllers(pdev); i++) {
|
|
struct isci_host *h = isci_host_alloc(pdev, i);
|
|
|
|
if (!h) {
|
|
err = -ENOMEM;
|
|
goto err_host_alloc;
|
|
}
|
|
pci_info->hosts[i] = h;
|
|
}
|
|
|
|
err = isci_setup_interrupts(pdev);
|
|
if (err)
|
|
goto err_host_alloc;
|
|
|
|
for_each_isci_host(i, isci_host, pdev)
|
|
scsi_scan_host(isci_host->shost);
|
|
|
|
return 0;
|
|
|
|
err_host_alloc:
|
|
for_each_isci_host(i, isci_host, pdev)
|
|
isci_unregister(isci_host);
|
|
return err;
|
|
}
|
|
|
|
static void __devexit isci_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct isci_host *ihost;
|
|
int i;
|
|
|
|
for_each_isci_host(i, ihost, pdev) {
|
|
isci_unregister(ihost);
|
|
isci_host_deinit(ihost);
|
|
sci_controller_disable_interrupts(ihost);
|
|
}
|
|
}
|
|
|
|
static struct pci_driver isci_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = isci_id_table,
|
|
.probe = isci_pci_probe,
|
|
.remove = __devexit_p(isci_pci_remove),
|
|
};
|
|
|
|
static __init int isci_init(void)
|
|
{
|
|
int err;
|
|
|
|
pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME);
|
|
|
|
isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
|
|
if (!isci_transport_template)
|
|
return -ENOMEM;
|
|
|
|
err = pci_register_driver(&isci_pci_driver);
|
|
if (err)
|
|
sas_release_transport(isci_transport_template);
|
|
|
|
return err;
|
|
}
|
|
|
|
static __exit void isci_exit(void)
|
|
{
|
|
pci_unregister_driver(&isci_pci_driver);
|
|
sas_release_transport(isci_transport_template);
|
|
}
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_FIRMWARE(ISCI_FW_NAME);
|
|
module_init(isci_init);
|
|
module_exit(isci_exit);
|