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| Current File : //usr/src/sys/dev/isci/isci.h |
/*-
* 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.
*
* 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.
*
* $FreeBSD: release/9.1.0/sys/dev/isci/isci.h 239741 2012-08-27 18:10:25Z jimharris $
*/
#ifndef _ISCI_H
#define _ISCI_H
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <dev/isci/environment.h>
#include <dev/isci/scil/intel_pci.h>
#include <dev/isci/scil/sci_types.h>
#include <dev/isci/scil/sci_object.h>
#include <dev/isci/scil/sci_status.h>
#include <dev/isci/scil/sci_pool.h>
#include <dev/isci/scil/sci_fast_list.h>
#include <dev/isci/scil/sci_controller_constants.h>
#include <dev/isci/scil/scic_controller.h>
#include <dev/isci/scil/scic_config_parameters.h>
#define DEVICE2SOFTC(dev) ((struct isci_softc *) device_get_softc(dev))
#define DEVICE_TIMEOUT 1000
#define SCI_MAX_TIMERS 32
#define ISCI_NUM_PCI_BARS 2
#define ISCI_MAX_LUN 8
MALLOC_DECLARE(M_ISCI);
struct ISCI_TIMER {
struct callout callout;
SCI_TIMER_CALLBACK_T callback;
void *cookie;
BOOL is_started;
};
struct ISCI_REMOTE_DEVICE {
uint32_t index;
struct ISCI_DOMAIN *domain;
SCI_REMOTE_DEVICE_HANDLE_T sci_object;
BOOL is_resetting;
uint32_t frozen_lun_mask;
SCI_FAST_LIST_ELEMENT_T pending_device_reset_element;
/*
* This queue maintains CCBs that have been returned with
* SCI_IO_FAILURE_INVALID_STATE from the SCI layer. These CCBs
* need to be retried, but we cannot return CAM_REQUEUE_REQ because
* this status gets passed all the way back up to users of the pass(4)
* interface and breaks things like smartctl. So instead, we queue
* these CCBs internally.
*/
TAILQ_HEAD(,ccb_hdr) queued_ccbs;
/*
* Marker denoting this remote device needs its first queued ccb to
* be retried.
*/
BOOL release_queued_ccb;
/*
* Points to a CCB in the queue that is currently being processed by
* SCIL. This allows us to keep in flight CCBs in the queue so as to
* maintain ordering (i.e. in case we retry an I/O and then find out
* it needs to be retried again - it just keeps its same place in the
* queue.
*/
union ccb * queued_ccb_in_progress;
};
struct ISCI_DOMAIN {
struct ISCI_CONTROLLER *controller;
SCI_DOMAIN_HANDLE_T sci_object;
uint8_t index;
struct ISCI_REMOTE_DEVICE *da_remote_device;
};
struct ISCI_MEMORY
{
bus_addr_t physical_address;
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
POINTER_UINT virtual_address;
uint32_t size;
int error;
};
struct ISCI_INTERRUPT_INFO
{
SCIC_CONTROLLER_HANDLER_METHODS_T *handlers;
void *interrupt_target_handle;
struct resource *res;
int rid;
void *tag;
};
struct ISCI_CONTROLLER
{
struct isci_softc *isci;
uint8_t index;
SCI_CONTROLLER_HANDLE_T scif_controller_handle;
struct ISCI_DOMAIN domain[SCI_MAX_DOMAINS];
BOOL is_started;
BOOL has_been_scanned;
uint32_t initial_discovery_mask;
BOOL is_frozen;
BOOL release_queued_ccbs;
uint8_t *remote_device_memory;
struct ISCI_MEMORY cached_controller_memory;
struct ISCI_MEMORY uncached_controller_memory;
struct ISCI_MEMORY request_memory;
bus_dma_tag_t buffer_dma_tag;
struct mtx lock;
struct cam_sim *sim;
struct cam_path *path;
struct ISCI_REMOTE_DEVICE *remote_device[SCI_MAX_REMOTE_DEVICES];
void *timer_memory;
SCIC_OEM_PARAMETERS_T oem_parameters;
uint32_t oem_parameters_version;
uint32_t queue_depth;
uint32_t sim_queue_depth;
SCI_FAST_LIST_T pending_device_reset_list;
SCI_MEMORY_DESCRIPTOR_LIST_HANDLE_T mdl;
SCI_POOL_CREATE(remote_device_pool, struct ISCI_REMOTE_DEVICE *, SCI_MAX_REMOTE_DEVICES);
SCI_POOL_CREATE(request_pool, struct ISCI_REQUEST *, SCI_MAX_IO_REQUESTS);
SCI_POOL_CREATE(timer_pool, struct ISCI_TIMER *, SCI_MAX_TIMERS);
SCI_POOL_CREATE(unmap_buffer_pool, void *, SCI_MAX_REMOTE_DEVICES);
};
struct ISCI_REQUEST
{
SCI_CONTROLLER_HANDLE_T controller_handle;
SCI_REMOTE_DEVICE_HANDLE_T remote_device_handle;
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
SCI_PHYSICAL_ADDRESS physical_address;
struct callout timer;
};
struct ISCI_IO_REQUEST
{
struct ISCI_REQUEST parent;
SCI_IO_REQUEST_HANDLE_T sci_object;
union ccb *ccb;
uint32_t num_segments;
uint32_t current_sge_index;
bus_dma_segment_t *sge;
};
struct ISCI_TASK_REQUEST
{
struct ISCI_REQUEST parent;
struct scsi_sense_data sense_data;
SCI_TASK_REQUEST_HANDLE_T sci_object;
union ccb *ccb;
};
struct ISCI_PCI_BAR {
bus_space_tag_t bus_tag;
bus_space_handle_t bus_handle;
int resource_id;
struct resource *resource;
};
/*
* One of these per allocated PCI device.
*/
struct isci_softc {
struct ISCI_PCI_BAR pci_bar[ISCI_NUM_PCI_BARS];
struct ISCI_CONTROLLER controllers[SCI_MAX_CONTROLLERS];
SCI_LIBRARY_HANDLE_T sci_library_handle;
void * sci_library_memory;
SCIC_CONTROLLER_HANDLER_METHODS_T handlers[4];
struct ISCI_INTERRUPT_INFO interrupt_info[4];
uint32_t controller_count;
uint32_t num_interrupts;
uint32_t coalesce_number;
uint32_t coalesce_timeout;
device_t device;
SCI_PCI_COMMON_HEADER_T pci_common_header;
BOOL oem_parameters_found;
struct intr_config_hook config_hook;
};
int isci_allocate_resources(device_t device);
int isci_allocate_dma_buffer(device_t device, struct ISCI_MEMORY *memory);
void isci_remote_device_reset(struct ISCI_REMOTE_DEVICE *remote_device,
union ccb *ccb);
/**
* Returns the negotiated link rate (in KB/s) for the associated
* remote device. Used to fill out bitrate field for GET_TRANS_SETTINGS.
* Will match the negotiated link rate for the lowest numbered local phy
* in the port/domain containing this remote device.
*/
uint32_t isci_remote_device_get_bitrate(
struct ISCI_REMOTE_DEVICE *remote_device);
void isci_remote_device_freeze_lun_queue(
struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
void isci_remote_device_release_lun_queue(
struct ISCI_REMOTE_DEVICE *remote_device, lun_id_t lun);
void isci_remote_device_release_device_queue(
struct ISCI_REMOTE_DEVICE * remote_device);
void isci_request_construct(struct ISCI_REQUEST *request,
SCI_CONTROLLER_HANDLE_T scif_controller_handle,
bus_dma_tag_t io_buffer_dma_tag, bus_addr_t physical_address);
#define isci_io_request_get_max_io_size() \
((SCI_MAX_SCATTER_GATHER_ELEMENTS - 1) * PAGE_SIZE)
#define isci_task_request_get_object_size() \
(sizeof(struct ISCI_TASK_REQUEST) + scif_task_request_get_object_size())
#define isci_io_request_get_object_size() \
(sizeof(struct ISCI_IO_REQUEST) + scif_io_request_get_object_size())
#define isci_request_get_object_size() \
max( \
isci_task_request_get_object_size(), \
isci_io_request_get_object_size() \
)
void isci_io_request_execute_scsi_io(union ccb *ccb,
struct ISCI_CONTROLLER *controller);
#if __FreeBSD_version >= 900026
void isci_io_request_execute_smp_io(
union ccb *ccb, struct ISCI_CONTROLLER *controller);
#endif
void isci_io_request_timeout(void *);
void isci_get_oem_parameters(struct isci_softc *isci);
void isci_io_request_complete(
SCI_CONTROLLER_HANDLE_T scif_controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
struct ISCI_IO_REQUEST * isci_request, SCI_IO_STATUS completion_status);
void isci_task_request_complete(
SCI_CONTROLLER_HANDLE_T scif_controller,
SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_TASK_REQUEST_HANDLE_T io_request, SCI_TASK_STATUS completion_status);
void isci_sysctl_initialize(struct isci_softc *isci);
void isci_controller_construct(struct ISCI_CONTROLLER *controller,
struct isci_softc *isci);
SCI_STATUS isci_controller_initialize(struct ISCI_CONTROLLER *controller);
int isci_controller_allocate_memory(struct ISCI_CONTROLLER *controller);
void isci_controller_domain_discovery_complete(
struct ISCI_CONTROLLER *isci_controller, struct ISCI_DOMAIN *isci_domain);
int isci_controller_attach_to_cam(struct ISCI_CONTROLLER *controller);
void isci_controller_start(void *controller);
void isci_controller_release_queued_ccbs(struct ISCI_CONTROLLER *controller);
void isci_domain_construct(struct ISCI_DOMAIN *domain, uint32_t domain_index,
struct ISCI_CONTROLLER *controller);
void isci_interrupt_setup(struct isci_softc *isci);
void isci_interrupt_poll_handler(struct ISCI_CONTROLLER *controller);
void isci_log_message(uint32_t verbosity, char *log_message_prefix,
char *log_message, ...);
extern uint32_t g_isci_debug_level;
#endif /* #ifndef _ISCI_H */