| /* |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| * The full GNU General Public License is included in this distribution |
| * in the file called LICENSE.GPL. |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef _SCI_HOST_H_ |
| #define _SCI_HOST_H_ |
| |
| #include "scic_sds_controller.h" |
| #include "remote_device.h" |
| #include "phy.h" |
| |
| struct isci_host { |
| struct scic_sds_controller sci; |
| union scic_oem_parameters oem_parameters; |
| |
| int id; /* unique within a given pci device */ |
| struct list_head timers; |
| void *core_ctrl_memory; |
| struct dma_pool *dma_pool; |
| struct isci_phy phys[SCI_MAX_PHYS]; |
| struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */ |
| struct sas_ha_struct sas_ha; |
| |
| int can_queue; |
| spinlock_t queue_lock; |
| spinlock_t state_lock; |
| |
| struct pci_dev *pdev; |
| |
| enum isci_status status; |
| #define IHOST_START_PENDING 0 |
| #define IHOST_STOP_PENDING 1 |
| unsigned long flags; |
| wait_queue_head_t eventq; |
| struct Scsi_Host *shost; |
| struct tasklet_struct completion_tasklet; |
| struct list_head requests_to_complete; |
| struct list_head requests_to_errorback; |
| spinlock_t scic_lock; |
| |
| struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES]; |
| }; |
| |
| /** |
| * struct isci_pci_info - This class represents the pci function containing the |
| * controllers. Depending on PCI SKU, there could be up to 2 controllers in |
| * the PCI function. |
| */ |
| #define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS) |
| |
| struct isci_pci_info { |
| struct msix_entry msix_entries[SCI_MAX_MSIX_INT]; |
| struct isci_host *hosts[SCI_MAX_CONTROLLERS]; |
| struct isci_orom *orom; |
| }; |
| |
| static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev) |
| { |
| return pci_get_drvdata(pdev); |
| } |
| |
| #define for_each_isci_host(id, ihost, pdev) \ |
| for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \ |
| id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \ |
| ihost = to_pci_info(pdev)->hosts[++id]) |
| |
| static inline |
| enum isci_status isci_host_get_state( |
| struct isci_host *isci_host) |
| { |
| return isci_host->status; |
| } |
| |
| |
| static inline void isci_host_change_state( |
| struct isci_host *isci_host, |
| enum isci_status status) |
| { |
| unsigned long flags; |
| |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_host = %p, state = 0x%x", |
| __func__, |
| isci_host, |
| status); |
| spin_lock_irqsave(&isci_host->state_lock, flags); |
| isci_host->status = status; |
| spin_unlock_irqrestore(&isci_host->state_lock, flags); |
| |
| } |
| |
| static inline int isci_host_can_queue( |
| struct isci_host *isci_host, |
| int num) |
| { |
| int ret = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&isci_host->queue_lock, flags); |
| if ((isci_host->can_queue - num) < 0) { |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_host->can_queue = %d\n", |
| __func__, |
| isci_host->can_queue); |
| ret = -SAS_QUEUE_FULL; |
| |
| } else |
| isci_host->can_queue -= num; |
| |
| spin_unlock_irqrestore(&isci_host->queue_lock, flags); |
| |
| return ret; |
| } |
| |
| static inline void isci_host_can_dequeue( |
| struct isci_host *isci_host, |
| int num) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&isci_host->queue_lock, flags); |
| isci_host->can_queue += num; |
| spin_unlock_irqrestore(&isci_host->queue_lock, flags); |
| } |
| |
| static inline void wait_for_start(struct isci_host *ihost) |
| { |
| wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags)); |
| } |
| |
| static inline void wait_for_stop(struct isci_host *ihost) |
| { |
| wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags)); |
| } |
| |
| static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev) |
| { |
| wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags)); |
| } |
| |
| static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev) |
| { |
| wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags)); |
| } |
| |
| static inline struct isci_host *dev_to_ihost(struct domain_device *dev) |
| { |
| return dev->port->ha->lldd_ha; |
| } |
| |
| static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic) |
| { |
| /* XXX delete after merging scic_sds_contoller and isci_host */ |
| struct isci_host *ihost = container_of(scic, typeof(*ihost), sci); |
| |
| return ihost; |
| } |
| |
| /** |
| * isci_host_scan_finished() - |
| * |
| * This function is one of the SCSI Host Template functions. The SCSI midlayer |
| * calls this function during a target scan, approx. once every 10 millisecs. |
| */ |
| int isci_host_scan_finished( |
| struct Scsi_Host *, |
| unsigned long); |
| |
| |
| /** |
| * isci_host_scan_start() - |
| * |
| * This function is one of the SCSI Host Template function, called by the SCSI |
| * mid layer berfore a target scan begins. The core library controller start |
| * routine is called from here. |
| */ |
| void isci_host_scan_start( |
| struct Scsi_Host *); |
| |
| /** |
| * isci_host_start_complete() - |
| * |
| * This function is called by the core library, through the ISCI Module, to |
| * indicate controller start status. |
| */ |
| void isci_host_start_complete( |
| struct isci_host *, |
| enum sci_status); |
| |
| void isci_host_stop_complete( |
| struct isci_host *isci_host, |
| enum sci_status completion_status); |
| |
| int isci_host_init(struct isci_host *); |
| |
| void isci_host_init_controller_names( |
| struct isci_host *isci_host, |
| unsigned int controller_idx); |
| |
| void isci_host_deinit( |
| struct isci_host *); |
| |
| void isci_host_port_link_up( |
| struct isci_host *, |
| struct scic_sds_port *, |
| struct scic_sds_phy *); |
| int isci_host_dev_found(struct domain_device *); |
| |
| void isci_host_remote_device_start_complete( |
| struct isci_host *, |
| struct isci_remote_device *, |
| enum sci_status); |
| |
| #endif /* !defined(_SCI_HOST_H_) */ |