cadbd4a5e3
[jejb: fixed up a ton of missed conversions. All of you are on notice this has happened, driver trees will now need to be rebased] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: SCSI List <linux-scsi@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
291 lines
9.1 KiB
C
291 lines
9.1 KiB
C
/*
|
|
*
|
|
* Linux MegaRAID device driver
|
|
*
|
|
* Copyright (c) 2003-2004 LSI Logic Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* FILE : mega_common.h
|
|
*
|
|
* Libaray of common routine used by all low-level megaraid drivers
|
|
*/
|
|
|
|
#ifndef _MEGA_COMMON_H_
|
|
#define _MEGA_COMMON_H_
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/list.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_cmnd.h>
|
|
#include <scsi/scsi_device.h>
|
|
#include <scsi/scsi_host.h>
|
|
|
|
|
|
#define LSI_MAX_CHANNELS 16
|
|
#define LSI_MAX_LOGICAL_DRIVES_64LD (64+1)
|
|
|
|
#define HBA_SIGNATURE_64_BIT 0x299
|
|
#define PCI_CONF_AMISIG64 0xa4
|
|
|
|
#define MEGA_SCSI_INQ_EVPD 1
|
|
#define MEGA_INVALID_FIELD_IN_CDB 0x24
|
|
|
|
|
|
/**
|
|
* scb_t - scsi command control block
|
|
* @ccb : command control block for individual driver
|
|
* @list : list of control blocks
|
|
* @gp : general purpose field for LLDs
|
|
* @sno : all SCBs have a serial number
|
|
* @scp : associated scsi command
|
|
* @state : current state of scb
|
|
* @dma_dir : direction of data transfer
|
|
* @dma_type : transfer with sg list, buffer, or no data transfer
|
|
* @dev_channel : actual channel on the device
|
|
* @dev_target : actual target on the device
|
|
* @status : completion status
|
|
*
|
|
* This is our central data structure to issue commands the each driver.
|
|
* Driver specific data structures are maintained in the ccb field.
|
|
* scb provides a field 'gp', which can be used by LLD for its own purposes
|
|
*
|
|
* dev_channel and dev_target must be initialized with the actual channel and
|
|
* target on the controller.
|
|
*/
|
|
typedef struct {
|
|
caddr_t ccb;
|
|
struct list_head list;
|
|
unsigned long gp;
|
|
unsigned int sno;
|
|
struct scsi_cmnd *scp;
|
|
uint32_t state;
|
|
uint32_t dma_direction;
|
|
uint32_t dma_type;
|
|
uint16_t dev_channel;
|
|
uint16_t dev_target;
|
|
uint32_t status;
|
|
} scb_t;
|
|
|
|
/*
|
|
* SCB states as it transitions from one state to another
|
|
*/
|
|
#define SCB_FREE 0x0000 /* on the free list */
|
|
#define SCB_ACTIVE 0x0001 /* off the free list */
|
|
#define SCB_PENDQ 0x0002 /* on the pending queue */
|
|
#define SCB_ISSUED 0x0004 /* issued - owner f/w */
|
|
#define SCB_ABORT 0x0008 /* Got an abort for this one */
|
|
#define SCB_RESET 0x0010 /* Got a reset for this one */
|
|
|
|
/*
|
|
* DMA types for scb
|
|
*/
|
|
#define MRAID_DMA_NONE 0x0000 /* no data transfer for this command */
|
|
#define MRAID_DMA_WSG 0x0001 /* data transfer using a sg list */
|
|
#define MRAID_DMA_WBUF 0x0002 /* data transfer using a contiguous buffer */
|
|
|
|
|
|
/**
|
|
* struct adapter_t - driver's initialization structure
|
|
* @aram dpc_h : tasklet handle
|
|
* @pdev : pci configuration pointer for kernel
|
|
* @host : pointer to host structure of mid-layer
|
|
* @lock : synchronization lock for mid-layer and driver
|
|
* @quiescent : driver is quiescent for now.
|
|
* @outstanding_cmds : number of commands pending in the driver
|
|
* @kscb_list : pointer to the bulk of SCBs pointers for IO
|
|
* @kscb_pool : pool of free scbs for IO
|
|
* @kscb_pool_lock : lock for pool of free scbs
|
|
* @pend_list : pending commands list
|
|
* @pend_list_lock : exclusion lock for pending commands list
|
|
* @completed_list : list of completed commands
|
|
* @completed_list_lock : exclusion lock for list of completed commands
|
|
* @sglen : max sg elements supported
|
|
* @device_ids : to convert kernel device addr to our devices.
|
|
* @raid_device : raid adapter specific pointer
|
|
* @max_channel : maximum channel number supported - inclusive
|
|
* @max_target : max target supported - inclusive
|
|
* @max_lun : max lun supported - inclusive
|
|
* @unique_id : unique identifier for each adapter
|
|
* @irq : IRQ for this adapter
|
|
* @ito : internal timeout value, (-1) means no timeout
|
|
* @ibuf : buffer to issue internal commands
|
|
* @ibuf_dma_h : dma handle for the above buffer
|
|
* @uscb_list : SCB pointers for user cmds, common mgmt module
|
|
* @uscb_pool : pool of SCBs for user commands
|
|
* @uscb_pool_lock : exclusion lock for these SCBs
|
|
* @max_cmds : max outstanding commands
|
|
* @fw_version : firmware version
|
|
* @bios_version : bios version
|
|
* @max_cdb_sz : biggest CDB size supported.
|
|
* @ha : is high availability present - clustering
|
|
* @init_id : initiator ID, the default value should be 7
|
|
* @max_sectors : max sectors per request
|
|
* @cmd_per_lun : max outstanding commands per LUN
|
|
* @being_detached : set when unloading, no more mgmt calls
|
|
*
|
|
*
|
|
* mraid_setup_device_map() can be called anytime after the device map is
|
|
* available and MRAID_GET_DEVICE_MAP() can be called whenever the mapping is
|
|
* required, usually from LLD's queue entry point. The formar API sets up the
|
|
* MRAID_IS_LOGICAL(adapter_t *, struct scsi_cmnd *) to find out if the
|
|
* device in question is a logical drive.
|
|
*
|
|
* quiescent flag should be set by the driver if it is not accepting more
|
|
* commands
|
|
*
|
|
* NOTE: The fields of this structures are placed to minimize cache misses
|
|
*/
|
|
|
|
// amount of space required to store the bios and firmware version strings
|
|
#define VERSION_SIZE 16
|
|
|
|
typedef struct {
|
|
struct tasklet_struct dpc_h;
|
|
struct pci_dev *pdev;
|
|
struct Scsi_Host *host;
|
|
spinlock_t lock;
|
|
uint8_t quiescent;
|
|
int outstanding_cmds;
|
|
scb_t *kscb_list;
|
|
struct list_head kscb_pool;
|
|
spinlock_t kscb_pool_lock;
|
|
struct list_head pend_list;
|
|
spinlock_t pend_list_lock;
|
|
struct list_head completed_list;
|
|
spinlock_t completed_list_lock;
|
|
uint16_t sglen;
|
|
int device_ids[LSI_MAX_CHANNELS]
|
|
[LSI_MAX_LOGICAL_DRIVES_64LD];
|
|
caddr_t raid_device;
|
|
uint8_t max_channel;
|
|
uint16_t max_target;
|
|
uint8_t max_lun;
|
|
|
|
uint32_t unique_id;
|
|
int irq;
|
|
uint8_t ito;
|
|
caddr_t ibuf;
|
|
dma_addr_t ibuf_dma_h;
|
|
scb_t *uscb_list;
|
|
struct list_head uscb_pool;
|
|
spinlock_t uscb_pool_lock;
|
|
int max_cmds;
|
|
uint8_t fw_version[VERSION_SIZE];
|
|
uint8_t bios_version[VERSION_SIZE];
|
|
uint8_t max_cdb_sz;
|
|
uint8_t ha;
|
|
uint16_t init_id;
|
|
uint16_t max_sectors;
|
|
uint16_t cmd_per_lun;
|
|
atomic_t being_detached;
|
|
} adapter_t;
|
|
|
|
#define SCSI_FREE_LIST_LOCK(adapter) (&adapter->kscb_pool_lock)
|
|
#define USER_FREE_LIST_LOCK(adapter) (&adapter->uscb_pool_lock)
|
|
#define PENDING_LIST_LOCK(adapter) (&adapter->pend_list_lock)
|
|
#define COMPLETED_LIST_LOCK(adapter) (&adapter->completed_list_lock)
|
|
|
|
|
|
// conversion from scsi command
|
|
#define SCP2HOST(scp) (scp)->device->host // to host
|
|
#define SCP2HOSTDATA(scp) SCP2HOST(scp)->hostdata // to soft state
|
|
#define SCP2CHANNEL(scp) (scp)->device->channel // to channel
|
|
#define SCP2TARGET(scp) (scp)->device->id // to target
|
|
#define SCP2LUN(scp) (scp)->device->lun // to LUN
|
|
|
|
// generic macro to convert scsi command and host to controller's soft state
|
|
#define SCSIHOST2ADAP(host) (((caddr_t *)(host->hostdata))[0])
|
|
#define SCP2ADAPTER(scp) (adapter_t *)SCSIHOST2ADAP(SCP2HOST(scp))
|
|
|
|
|
|
#define MRAID_IS_LOGICAL(adp, scp) \
|
|
(SCP2CHANNEL(scp) == (adp)->max_channel) ? 1 : 0
|
|
|
|
#define MRAID_IS_LOGICAL_SDEV(adp, sdev) \
|
|
(sdev->channel == (adp)->max_channel) ? 1 : 0
|
|
|
|
/**
|
|
* MRAID_GET_DEVICE_MAP - device ids
|
|
* @adp : adapter's soft state
|
|
* @scp : mid-layer scsi command pointer
|
|
* @p_chan : physical channel on the controller
|
|
* @target : target id of the device or logical drive number
|
|
* @islogical : set if the command is for the logical drive
|
|
*
|
|
* Macro to retrieve information about device class, logical or physical and
|
|
* the corresponding physical channel and target or logical drive number
|
|
*/
|
|
#define MRAID_GET_DEVICE_MAP(adp, scp, p_chan, target, islogical) \
|
|
/* \
|
|
* Is the request coming for the virtual channel \
|
|
*/ \
|
|
islogical = MRAID_IS_LOGICAL(adp, scp); \
|
|
\
|
|
/* \
|
|
* Get an index into our table of drive ids mapping \
|
|
*/ \
|
|
if (islogical) { \
|
|
p_chan = 0xFF; \
|
|
target = \
|
|
(adp)->device_ids[(adp)->max_channel][SCP2TARGET(scp)]; \
|
|
} \
|
|
else { \
|
|
p_chan = ((adp)->device_ids[SCP2CHANNEL(scp)] \
|
|
[SCP2TARGET(scp)] >> 8) & 0xFF; \
|
|
target = ((adp)->device_ids[SCP2CHANNEL(scp)] \
|
|
[SCP2TARGET(scp)] & 0xFF); \
|
|
}
|
|
|
|
/*
|
|
* ### Helper routines ###
|
|
*/
|
|
#define LSI_DBGLVL mraid_debug_level // each LLD must define a global
|
|
// mraid_debug_level
|
|
|
|
#ifdef DEBUG
|
|
#if defined (_ASSERT_PANIC)
|
|
#define ASSERT_ACTION panic
|
|
#else
|
|
#define ASSERT_ACTION printk
|
|
#endif
|
|
|
|
#define ASSERT(expression) \
|
|
if (!(expression)) { \
|
|
ASSERT_ACTION("assertion failed:(%s), file: %s, line: %d:%s\n", \
|
|
#expression, __FILE__, __LINE__, __func__); \
|
|
}
|
|
#else
|
|
#define ASSERT(expression)
|
|
#endif
|
|
|
|
/**
|
|
* struct mraid_pci_blk - structure holds DMA memory block info
|
|
* @vaddr : virtual address to a memory block
|
|
* @dma_addr : DMA handle to a memory block
|
|
*
|
|
* This structure is filled up for the caller. It is the responsibilty of the
|
|
* caller to allocate this array big enough to store addresses for all
|
|
* requested elements
|
|
*/
|
|
struct mraid_pci_blk {
|
|
caddr_t vaddr;
|
|
dma_addr_t dma_addr;
|
|
};
|
|
|
|
#endif // _MEGA_COMMON_H_
|
|
|
|
// vim: set ts=8 sw=8 tw=78:
|