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Diffstat (limited to 'drivers/scsi/isci/host.h')
| -rw-r--r-- | drivers/scsi/isci/host.h | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h new file mode 100644 index 000000000000..3530076d6107 --- /dev/null +++ b/drivers/scsi/isci/host.h @@ -0,0 +1,283 @@ +/* + * 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. + */ + +/** + * This file contains the isci_module initialization routines. + * + * host.h + */ + + + +#if !defined(_SCI_HOST_H_) +#define _SCI_HOST_H_ + +#include "phy.h" +/*#include "task.h"*/ +#include "timers.h" +#include "remote_device.h" +#include "scic_user_callback.h" + +#define DRV_NAME "isci" +#define SCI_PCI_BAR_COUNT 2 +#define SCI_NUM_MSI_X_INT 2 +#define SCI_SMU_BAR 0 +#define SCI_SMU_BAR_SIZE (16*1024) +#define SCI_SCU_BAR 1 +#define SCI_SCU_BAR_SIZE (4*1024*1024) +#define SCI_IO_SPACE_BAR0 2 +#define SCI_IO_SPACE_BAR1 3 +#define SCI_MSIX_NORMAL_VECTOR 0 +#define SCI_MSIX_ERROR_VECTOR 1 +#define SCI_MSIX_SINGLE_VECTOR 1 +#define SCI_MSIX_DOUBLE_VECTOR 2 +#define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */ +#define SCIC_CONTROLLER_STOP_TIMEOUT 5000 + +struct coherent_memory_info { + struct list_head node; + dma_addr_t dma_handle; + void *vaddr; + size_t size; + struct sci_physical_memory_descriptor *mde; +}; + +struct isci_host { + struct scic_sds_controller *core_controller; + struct scic_controller_handler_methods scic_irq_handlers[SCI_NUM_MSI_X_INT]; + union scic_oem_parameters oem_parameters; + + int id; /* unique within a given pci device */ + struct isci_timer_list timer_list_struct; + void *core_ctrl_memory; + struct dma_pool *dma_pool; + unsigned int dma_pool_alloc_size; + struct isci_phy phys[SCI_MAX_PHYS]; + + /* isci_ports and sas_ports are implicitly parallel to the + * ports maintained by the core + */ + struct isci_port isci_ports[SCI_MAX_PORTS]; + struct asd_sas_port sas_ports[SCI_MAX_PORTS]; + struct sas_ha_struct sas_ha; + + int can_queue; + spinlock_t queue_lock; + spinlock_t state_lock; + + struct pci_dev *pdev; + u8 sas_addr[SAS_ADDR_SIZE]; + + enum isci_status status; + struct Scsi_Host *shost; + struct tasklet_struct completion_tasklet; + struct list_head mdl_struct_list; + struct list_head requests_to_complete; + struct list_head requests_to_abort; + struct completion stop_complete; + struct completion start_complete; + spinlock_t scic_lock; + struct isci_host *next; +}; + + +/** + * 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]; + int core_lib_array_index; + SCI_LIBRARY_HANDLE_T core_lib_handle; + struct isci_host *hosts; +}; + +static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev) +{ + return pci_get_drvdata(pdev); +} + +#define for_each_isci_host(isci_host, pdev) \ + for (isci_host = to_pci_info(pdev)->hosts;\ + isci_host; isci_host = isci_host->next) + +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); +} + +/** + * isci_host_from_sas_ha() - This accessor retrieves the isci_host object + * reference from the Linux sas_ha_struct reference. + * @ha_struct,: This parameter points to the Linux sas_ha_struct object + * + * A reference to the associated isci_host structure. + */ +#define isci_host_from_sas_ha(ha_struct) \ + ((struct isci_host *)(ha_struct)->lldd_ha) + +/** + * 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_) */ |