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alistair23-linux/drivers/scsi/qla4xxx/ql4_def.h
David C Somayajulu 477ffb9d87 [SCSI] qla4xxx: bug fixes 
The included patch fixes the following issues:

1. qla3xxx/qla4xxx co-existence issue which can result in a lockup
when qla3xxx driver is unloaded, or when ifdown; ifup is performed on
one of the interfaces correponding to qla3xxx. This is because qla4xxx
HBA supports one ethernet and iscsi interfaces per port. Both iscsi
and ethernet interfaces share the same state machine. The problem has
to do with synchronizing access to the state machine in the event of a
reset

2. mutex_lock() is sometimes not followed by mutex_unlock() prior to
invoking a msleep() in qla4xxx_mailbox_command()

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-01-27 09:15:46 -06:00

595 lines
15 KiB
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/*
* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2006 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
#ifndef __QL4_DEF_H
#define __QL4_DEF_H
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/dmapool.h>
#include <linux/mempool.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_iscsi.h>
#ifndef PCI_DEVICE_ID_QLOGIC_ISP4010
#define PCI_DEVICE_ID_QLOGIC_ISP4010 0x4010
#endif
#ifndef PCI_DEVICE_ID_QLOGIC_ISP4022
#define PCI_DEVICE_ID_QLOGIC_ISP4022 0x4022
#endif
#ifndef PCI_DEVICE_ID_QLOGIC_ISP4032
#define PCI_DEVICE_ID_QLOGIC_ISP4032 0x4032
#endif
#define QLA_SUCCESS 0
#define QLA_ERROR 1
/*
* Data bit definitions
*/
#define BIT_0 0x1
#define BIT_1 0x2
#define BIT_2 0x4
#define BIT_3 0x8
#define BIT_4 0x10
#define BIT_5 0x20
#define BIT_6 0x40
#define BIT_7 0x80
#define BIT_8 0x100
#define BIT_9 0x200
#define BIT_10 0x400
#define BIT_11 0x800
#define BIT_12 0x1000
#define BIT_13 0x2000
#define BIT_14 0x4000
#define BIT_15 0x8000
#define BIT_16 0x10000
#define BIT_17 0x20000
#define BIT_18 0x40000
#define BIT_19 0x80000
#define BIT_20 0x100000
#define BIT_21 0x200000
#define BIT_22 0x400000
#define BIT_23 0x800000
#define BIT_24 0x1000000
#define BIT_25 0x2000000
#define BIT_26 0x4000000
#define BIT_27 0x8000000
#define BIT_28 0x10000000
#define BIT_29 0x20000000
#define BIT_30 0x40000000
#define BIT_31 0x80000000
/*
* Host adapter default definitions
***********************************/
#define MAX_HBAS 16
#define MAX_BUSES 1
#define MAX_TARGETS (MAX_PRST_DEV_DB_ENTRIES + MAX_DEV_DB_ENTRIES)
#define MAX_LUNS 0xffff
#define MAX_AEN_ENTRIES 256 /* should be > EXT_DEF_MAX_AEN_QUEUE */
#define MAX_DDB_ENTRIES (MAX_PRST_DEV_DB_ENTRIES + MAX_DEV_DB_ENTRIES)
#define MAX_PDU_ENTRIES 32
#define INVALID_ENTRY 0xFFFF
#define MAX_CMDS_TO_RISC 1024
#define MAX_SRBS MAX_CMDS_TO_RISC
#define MBOX_AEN_REG_COUNT 5
#define MAX_INIT_RETRIES 5
#define IOCB_HIWAT_CUSHION 16
/*
* Buffer sizes
*/
#define REQUEST_QUEUE_DEPTH MAX_CMDS_TO_RISC
#define RESPONSE_QUEUE_DEPTH 64
#define QUEUE_SIZE 64
#define DMA_BUFFER_SIZE 512
/*
* Misc
*/
#define MAC_ADDR_LEN 6 /* in bytes */
#define IP_ADDR_LEN 4 /* in bytes */
#define DRIVER_NAME "qla4xxx"
#define MAX_LINKED_CMDS_PER_LUN 3
#define MAX_REQS_SERVICED_PER_INTR 16
#define ISCSI_IPADDR_SIZE 4 /* IP address size */
#define ISCSI_ALIAS_SIZE 32 /* ISCSI Alais name size */
#define ISCSI_NAME_SIZE 255 /* ISCSI Name size -
* usually a string */
#define LSDW(x) ((u32)((u64)(x)))
#define MSDW(x) ((u32)((((u64)(x)) >> 16) >> 16))
/*
* Retry & Timeout Values
*/
#define MBOX_TOV 60
#define SOFT_RESET_TOV 30
#define RESET_INTR_TOV 3
#define SEMAPHORE_TOV 10
#define ADAPTER_INIT_TOV 120
#define ADAPTER_RESET_TOV 180
#define EXTEND_CMD_TOV 60
#define WAIT_CMD_TOV 30
#define EH_WAIT_CMD_TOV 120
#define FIRMWARE_UP_TOV 60
#define RESET_FIRMWARE_TOV 30
#define LOGOUT_TOV 10
#define IOCB_TOV_MARGIN 10
#define RELOGIN_TOV 18
#define ISNS_DEREG_TOV 5
#define MAX_RESET_HA_RETRIES 2
/*
* SCSI Request Block structure (srb) that is placed
* on cmd->SCp location of every I/O [We have 22 bytes available]
*/
struct srb {
struct list_head list; /* (8) */
struct scsi_qla_host *ha; /* HA the SP is queued on */
struct ddb_entry *ddb;
uint16_t flags; /* (1) Status flags. */
#define SRB_DMA_VALID BIT_3 /* DMA Buffer mapped. */
#define SRB_GOT_SENSE BIT_4 /* sense data recieved. */
uint8_t state; /* (1) Status flags. */
#define SRB_NO_QUEUE_STATE 0 /* Request is in between states */
#define SRB_FREE_STATE 1
#define SRB_ACTIVE_STATE 3
#define SRB_ACTIVE_TIMEOUT_STATE 4
#define SRB_SUSPENDED_STATE 7 /* Request in suspended state */
struct scsi_cmnd *cmd; /* (4) SCSI command block */
dma_addr_t dma_handle; /* (4) for unmap of single transfers */
atomic_t ref_count; /* reference count for this srb */
uint32_t fw_ddb_index;
uint8_t err_id; /* error id */
#define SRB_ERR_PORT 1 /* Request failed because "port down" */
#define SRB_ERR_LOOP 2 /* Request failed because "loop down" */
#define SRB_ERR_DEVICE 3 /* Request failed because "device error" */
#define SRB_ERR_OTHER 4
uint16_t reserved;
uint16_t iocb_tov;
uint16_t iocb_cnt; /* Number of used iocbs */
uint16_t cc_stat;
u_long r_start; /* Time we recieve a cmd from OS */
u_long u_start; /* Time when we handed the cmd to F/W */
};
/*
* Device Database (DDB) structure
*/
struct ddb_entry {
struct list_head list; /* ddb list */
struct scsi_qla_host *ha;
struct iscsi_cls_session *sess;
struct iscsi_cls_conn *conn;
atomic_t state; /* DDB State */
unsigned long flags; /* DDB Flags */
unsigned long dev_scan_wait_to_start_relogin;
unsigned long dev_scan_wait_to_complete_relogin;
uint16_t os_target_id; /* Target ID */
uint16_t fw_ddb_index; /* DDB firmware index */
uint8_t reserved[2];
uint32_t fw_ddb_device_state; /* F/W Device State -- see ql4_fw.h */
uint32_t CmdSn;
uint16_t target_session_id;
uint16_t connection_id;
uint16_t exe_throttle; /* Max mumber of cmds outstanding
* simultaneously */
uint16_t task_mgmt_timeout; /* Min time for task mgmt cmds to
* complete */
uint16_t default_relogin_timeout; /* Max time to wait for
* relogin to complete */
uint16_t tcp_source_port_num;
uint32_t default_time2wait; /* Default Min time between
* relogins (+aens) */
atomic_t port_down_timer; /* Device connection timer */
atomic_t retry_relogin_timer; /* Min Time between relogins
* (4000 only) */
atomic_t relogin_timer; /* Max Time to wait for relogin to complete */
atomic_t relogin_retry_count; /* Num of times relogin has been
* retried */
uint16_t port;
uint32_t tpgt;
uint8_t ip_addr[ISCSI_IPADDR_SIZE];
uint8_t iscsi_name[ISCSI_NAME_SIZE]; /* 72 x48 */
uint8_t iscsi_alias[0x20];
};
/*
* DDB states.
*/
#define DDB_STATE_DEAD 0 /* We can no longer talk to
* this device */
#define DDB_STATE_ONLINE 1 /* Device ready to accept
* commands */
#define DDB_STATE_MISSING 2 /* Device logged off, trying
* to re-login */
/*
* DDB flags.
*/
#define DF_RELOGIN 0 /* Relogin to device */
#define DF_NO_RELOGIN 1 /* Do not relogin if IOCTL
* logged it out */
#define DF_ISNS_DISCOVERED 2 /* Device was discovered via iSNS */
#define DF_FO_MASKED 3
/*
* Asynchronous Event Queue structure
*/
struct aen {
uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
};
#include "ql4_fw.h"
#include "ql4_nvram.h"
/*
* Linux Host Adapter structure
*/
struct scsi_qla_host {
/* Linux adapter configuration data */
struct Scsi_Host *host; /* pointer to host data */
uint32_t tot_ddbs;
unsigned long flags;
#define AF_ONLINE 0 /* 0x00000001 */
#define AF_INIT_DONE 1 /* 0x00000002 */
#define AF_MBOX_COMMAND 2 /* 0x00000004 */
#define AF_MBOX_COMMAND_DONE 3 /* 0x00000008 */
#define AF_INTERRUPTS_ON 6 /* 0x00000040 Not Used */
#define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
#define AF_LINK_UP 8 /* 0x00000100 */
#define AF_IRQ_ATTACHED 10 /* 0x00000400 */
#define AF_ISNS_CMD_IN_PROCESS 12 /* 0x00001000 */
#define AF_ISNS_CMD_DONE 13 /* 0x00002000 */
unsigned long dpc_flags;
#define DPC_RESET_HA 1 /* 0x00000002 */
#define DPC_RETRY_RESET_HA 2 /* 0x00000004 */
#define DPC_RELOGIN_DEVICE 3 /* 0x00000008 */
#define DPC_RESET_HA_DESTROY_DDB_LIST 4 /* 0x00000010 */
#define DPC_RESET_HA_INTR 5 /* 0x00000020 */
#define DPC_ISNS_RESTART 7 /* 0x00000080 */
#define DPC_AEN 9 /* 0x00000200 */
#define DPC_GET_DHCP_IP_ADDR 15 /* 0x00008000 */
uint16_t iocb_cnt;
uint16_t iocb_hiwat;
/* SRB cache. */
#define SRB_MIN_REQ 128
mempool_t *srb_mempool;
/* pci information */
struct pci_dev *pdev;
struct isp_reg __iomem *reg; /* Base I/O address */
unsigned long pio_address;
unsigned long pio_length;
#define MIN_IOBASE_LEN 0x100
uint16_t req_q_count;
uint8_t marker_needed;
uint8_t rsvd1;
unsigned long host_no;
/* NVRAM registers */
struct eeprom_data *nvram;
spinlock_t hardware_lock ____cacheline_aligned;
uint32_t eeprom_cmd_data;
/* Counters for general statistics */
uint64_t isr_count;
uint64_t adapter_error_count;
uint64_t device_error_count;
uint64_t total_io_count;
uint64_t total_mbytes_xferred;
uint64_t link_failure_count;
uint64_t invalid_crc_count;
uint32_t bytes_xfered;
uint32_t spurious_int_count;
uint32_t aborted_io_count;
uint32_t io_timeout_count;
uint32_t mailbox_timeout_count;
uint32_t seconds_since_last_intr;
uint32_t seconds_since_last_heartbeat;
uint32_t mac_index;
/* Info Needed for Management App */
/* --- From GetFwVersion --- */
uint32_t firmware_version[2];
uint32_t patch_number;
uint32_t build_number;
/* --- From Init_FW --- */
/* init_cb_t *init_cb; */
uint16_t firmware_options;
uint16_t tcp_options;
uint8_t ip_address[IP_ADDR_LEN];
uint8_t subnet_mask[IP_ADDR_LEN];
uint8_t gateway[IP_ADDR_LEN];
uint8_t alias[32];
uint8_t name_string[256];
uint8_t heartbeat_interval;
uint8_t rsvd;
/* --- From FlashSysInfo --- */
uint8_t my_mac[MAC_ADDR_LEN];
uint8_t serial_number[16];
/* --- From GetFwState --- */
uint32_t firmware_state;
uint32_t board_id;
uint32_t addl_fw_state;
/* Linux kernel thread */
struct workqueue_struct *dpc_thread;
struct work_struct dpc_work;
/* Linux timer thread */
struct timer_list timer;
uint32_t timer_active;
/* Recovery Timers */
uint32_t port_down_retry_count;
uint32_t discovery_wait;
atomic_t check_relogin_timeouts;
uint32_t retry_reset_ha_cnt;
uint32_t isp_reset_timer; /* reset test timer */
uint32_t nic_reset_timer; /* simulated nic reset test timer */
int eh_start;
struct list_head free_srb_q;
uint16_t free_srb_q_count;
uint16_t num_srbs_allocated;
/* DMA Memory Block */
void *queues;
dma_addr_t queues_dma;
unsigned long queues_len;
#define MEM_ALIGN_VALUE \
((max(REQUEST_QUEUE_DEPTH, RESPONSE_QUEUE_DEPTH)) * \
sizeof(struct queue_entry))
/* request and response queue variables */
dma_addr_t request_dma;
struct queue_entry *request_ring;
struct queue_entry *request_ptr;
dma_addr_t response_dma;
struct queue_entry *response_ring;
struct queue_entry *response_ptr;
dma_addr_t shadow_regs_dma;
struct shadow_regs *shadow_regs;
uint16_t request_in; /* Current indexes. */
uint16_t request_out;
uint16_t response_in;
uint16_t response_out;
/* aen queue variables */
uint16_t aen_q_count; /* Number of available aen_q entries */
uint16_t aen_in; /* Current indexes */
uint16_t aen_out;
struct aen aen_q[MAX_AEN_ENTRIES];
/* This mutex protects several threads to do mailbox commands
* concurrently.
*/
struct mutex mbox_sem;
/* temporary mailbox status registers */
volatile uint8_t mbox_status_count;
volatile uint32_t mbox_status[MBOX_REG_COUNT];
/* local device database list (contains internal ddb entries) */
struct list_head ddb_list;
/* Map ddb_list entry by FW ddb index */
struct ddb_entry *fw_ddb_index_map[MAX_DDB_ENTRIES];
};
static inline int is_qla4010(struct scsi_qla_host *ha)
{
return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4010;
}
static inline int is_qla4022(struct scsi_qla_host *ha)
{
return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4022;
}
static inline int is_qla4032(struct scsi_qla_host *ha)
{
return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4032;
}
static inline int adapter_up(struct scsi_qla_host *ha)
{
return (test_bit(AF_ONLINE, &ha->flags) != 0) &&
(test_bit(AF_LINK_UP, &ha->flags) != 0);
}
static inline struct scsi_qla_host* to_qla_host(struct Scsi_Host *shost)
{
return (struct scsi_qla_host *)shost->hostdata;
}
static inline void __iomem* isp_semaphore(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u1.isp4010.nvram :
&ha->reg->u1.isp4022.semaphore);
}
static inline void __iomem* isp_nvram(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u1.isp4010.nvram :
&ha->reg->u1.isp4022.nvram);
}
static inline void __iomem* isp_ext_hw_conf(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u2.isp4010.ext_hw_conf :
&ha->reg->u2.isp4022.p0.ext_hw_conf);
}
static inline void __iomem* isp_port_status(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u2.isp4010.port_status :
&ha->reg->u2.isp4022.p0.port_status);
}
static inline void __iomem* isp_port_ctrl(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u2.isp4010.port_ctrl :
&ha->reg->u2.isp4022.p0.port_ctrl);
}
static inline void __iomem* isp_port_error_status(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u2.isp4010.port_err_status :
&ha->reg->u2.isp4022.p0.port_err_status);
}
static inline void __iomem * isp_gp_out(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
&ha->reg->u2.isp4010.gp_out :
&ha->reg->u2.isp4022.p0.gp_out);
}
static inline int eeprom_ext_hw_conf_offset(struct scsi_qla_host *ha)
{
return (is_qla4010(ha) ?
offsetof(struct eeprom_data, isp4010.ext_hw_conf) / 2 :
offsetof(struct eeprom_data, isp4022.ext_hw_conf) / 2);
}
int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask);
int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
static inline int ql4xxx_lock_flash(struct scsi_qla_host *a)
{
if (is_qla4010(a))
return ql4xxx_sem_spinlock(a, QL4010_FLASH_SEM_MASK,
QL4010_FLASH_SEM_BITS);
else
return ql4xxx_sem_spinlock(a, QL4022_FLASH_SEM_MASK,
(QL4022_RESOURCE_BITS_BASE_CODE |
(a->mac_index)) << 13);
}
static inline void ql4xxx_unlock_flash(struct scsi_qla_host *a)
{
if (is_qla4010(a))
ql4xxx_sem_unlock(a, QL4010_FLASH_SEM_MASK);
else
ql4xxx_sem_unlock(a, QL4022_FLASH_SEM_MASK);
}
static inline int ql4xxx_lock_nvram(struct scsi_qla_host *a)
{
if (is_qla4010(a))
return ql4xxx_sem_spinlock(a, QL4010_NVRAM_SEM_MASK,
QL4010_NVRAM_SEM_BITS);
else
return ql4xxx_sem_spinlock(a, QL4022_NVRAM_SEM_MASK,
(QL4022_RESOURCE_BITS_BASE_CODE |
(a->mac_index)) << 10);
}
static inline void ql4xxx_unlock_nvram(struct scsi_qla_host *a)
{
if (is_qla4010(a))
ql4xxx_sem_unlock(a, QL4010_NVRAM_SEM_MASK);
else
ql4xxx_sem_unlock(a, QL4022_NVRAM_SEM_MASK);
}
static inline int ql4xxx_lock_drvr(struct scsi_qla_host *a)
{
if (is_qla4010(a))
return ql4xxx_sem_lock(a, QL4010_DRVR_SEM_MASK,
QL4010_DRVR_SEM_BITS);
else
return ql4xxx_sem_lock(a, QL4022_DRVR_SEM_MASK,
(QL4022_RESOURCE_BITS_BASE_CODE |
(a->mac_index)) << 1);
}
static inline void ql4xxx_unlock_drvr(struct scsi_qla_host *a)
{
if (is_qla4010(a))
ql4xxx_sem_unlock(a, QL4010_DRVR_SEM_MASK);
else
ql4xxx_sem_unlock(a, QL4022_DRVR_SEM_MASK);
}
/*---------------------------------------------------------------------------*/
/* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */
#define PRESERVE_DDB_LIST 0
#define REBUILD_DDB_LIST 1
/* Defines for process_aen() */
#define PROCESS_ALL_AENS 0
#define FLUSH_DDB_CHANGED_AENS 1
#define RELOGIN_DDB_CHANGED_AENS 2
#include "ql4_version.h"
#include "ql4_glbl.h"
#include "ql4_dbg.h"
#include "ql4_inline.h"
#endif /*_QLA4XXX_H */
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