302 lines
8.7 KiB
C
302 lines
8.7 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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#if !defined(_SCI_HOST_H_)
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#define _SCI_HOST_H_
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#include "phy.h"
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/*#include "task.h"*/
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#include "timers.h"
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#include "remote_device.h"
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#include "scic_remote_device.h"
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#define DRV_NAME "isci"
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#define SCI_PCI_BAR_COUNT 2
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#define SCI_NUM_MSI_X_INT 2
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#define SCI_SMU_BAR 0
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#define SCI_SMU_BAR_SIZE (16*1024)
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#define SCI_SCU_BAR 1
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#define SCI_SCU_BAR_SIZE (4*1024*1024)
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#define SCI_IO_SPACE_BAR0 2
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#define SCI_IO_SPACE_BAR1 3
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#define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */
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#define SCIC_CONTROLLER_STOP_TIMEOUT 5000
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struct coherent_memory_info {
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struct list_head node;
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dma_addr_t dma_handle;
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void *vaddr;
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size_t size;
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struct sci_physical_memory_descriptor *mde;
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};
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struct isci_host {
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struct scic_sds_controller *core_controller;
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union scic_oem_parameters oem_parameters;
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int id; /* unique within a given pci device */
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struct list_head timers;
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void *core_ctrl_memory;
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struct dma_pool *dma_pool;
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unsigned int dma_pool_alloc_size;
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struct isci_phy phys[SCI_MAX_PHYS];
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/* isci_ports and sas_ports are implicitly parallel to the
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* ports maintained by the core
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*/
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struct isci_port isci_ports[SCI_MAX_PORTS];
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struct asd_sas_port sas_ports[SCI_MAX_PORTS];
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struct sas_ha_struct sas_ha;
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int can_queue;
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spinlock_t queue_lock;
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spinlock_t state_lock;
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struct pci_dev *pdev;
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enum isci_status status;
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#define IHOST_START_PENDING 0
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#define IHOST_STOP_PENDING 1
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unsigned long flags;
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wait_queue_head_t eventq;
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struct Scsi_Host *shost;
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struct tasklet_struct completion_tasklet;
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struct list_head mdl_struct_list;
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struct list_head requests_to_complete;
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struct list_head requests_to_errorback;
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spinlock_t scic_lock;
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/* careful only access this via idev_by_id */
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struct isci_remote_device devices[0];
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};
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static inline struct isci_remote_device *idev_by_id(struct isci_host *ihost, int i)
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{
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void *p = ihost->devices;
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return p + i * (sizeof(struct isci_remote_device) +
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scic_remote_device_get_object_size());
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}
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/**
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* struct isci_pci_info - This class represents the pci function containing the
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* controllers. Depending on PCI SKU, there could be up to 2 controllers in
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* the PCI function.
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*/
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#define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS)
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struct isci_pci_info {
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struct msix_entry msix_entries[SCI_MAX_MSIX_INT];
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struct isci_host *hosts[SCI_MAX_CONTROLLERS];
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struct isci_orom *orom;
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};
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static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev)
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{
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return pci_get_drvdata(pdev);
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}
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#define for_each_isci_host(id, ihost, pdev) \
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for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \
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id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
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ihost = to_pci_info(pdev)->hosts[++id])
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static inline
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enum isci_status isci_host_get_state(
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struct isci_host *isci_host)
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{
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return isci_host->status;
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}
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static inline void isci_host_change_state(
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struct isci_host *isci_host,
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enum isci_status status)
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{
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unsigned long flags;
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_host = %p, state = 0x%x",
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__func__,
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isci_host,
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status);
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spin_lock_irqsave(&isci_host->state_lock, flags);
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isci_host->status = status;
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spin_unlock_irqrestore(&isci_host->state_lock, flags);
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}
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static inline int isci_host_can_queue(
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struct isci_host *isci_host,
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int num)
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{
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int ret = 0;
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unsigned long flags;
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spin_lock_irqsave(&isci_host->queue_lock, flags);
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if ((isci_host->can_queue - num) < 0) {
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dev_dbg(&isci_host->pdev->dev,
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"%s: isci_host->can_queue = %d\n",
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__func__,
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isci_host->can_queue);
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ret = -SAS_QUEUE_FULL;
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} else
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isci_host->can_queue -= num;
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spin_unlock_irqrestore(&isci_host->queue_lock, flags);
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return ret;
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}
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static inline void isci_host_can_dequeue(
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struct isci_host *isci_host,
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int num)
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{
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unsigned long flags;
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spin_lock_irqsave(&isci_host->queue_lock, flags);
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isci_host->can_queue += num;
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spin_unlock_irqrestore(&isci_host->queue_lock, flags);
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}
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static inline void wait_for_start(struct isci_host *ihost)
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{
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wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags));
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}
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static inline void wait_for_stop(struct isci_host *ihost)
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{
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wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags));
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}
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static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev)
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{
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wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags));
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}
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static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
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{
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wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags));
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}
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/**
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* isci_host_from_sas_ha() - This accessor retrieves the isci_host object
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* reference from the Linux sas_ha_struct reference.
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* @ha_struct,: This parameter points to the Linux sas_ha_struct object
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*
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* A reference to the associated isci_host structure.
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*/
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#define isci_host_from_sas_ha(ha_struct) \
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((struct isci_host *)(ha_struct)->lldd_ha)
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/**
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* isci_host_scan_finished() -
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*
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* This function is one of the SCSI Host Template functions. The SCSI midlayer
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* calls this function during a target scan, approx. once every 10 millisecs.
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*/
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int isci_host_scan_finished(
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struct Scsi_Host *,
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unsigned long);
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/**
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* isci_host_scan_start() -
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*
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* This function is one of the SCSI Host Template function, called by the SCSI
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* mid layer berfore a target scan begins. The core library controller start
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* routine is called from here.
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*/
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void isci_host_scan_start(
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struct Scsi_Host *);
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/**
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* isci_host_start_complete() -
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*
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* This function is called by the core library, through the ISCI Module, to
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* indicate controller start status.
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*/
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void isci_host_start_complete(
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struct isci_host *,
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enum sci_status);
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void isci_host_stop_complete(
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struct isci_host *isci_host,
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enum sci_status completion_status);
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int isci_host_init(struct isci_host *);
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void isci_host_init_controller_names(
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struct isci_host *isci_host,
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unsigned int controller_idx);
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void isci_host_deinit(
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struct isci_host *);
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void isci_host_port_link_up(
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struct isci_host *,
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struct scic_sds_port *,
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struct scic_sds_phy *);
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int isci_host_dev_found(struct domain_device *);
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void isci_host_remote_device_start_complete(
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struct isci_host *,
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struct isci_remote_device *,
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enum sci_status);
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#endif /* !defined(_SCI_HOST_H_) */
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