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aha/drivers/scsi/qla4xxx/ql4_def.h
Karen Higgins 16ed55f9de [SCSI] qla4xxx: Remove hiwat code so scsi eh does not get escalated when we can make progress 
Removed unnecessary hiwat code to free up the number available IOCBs.
Eliminates unnecessary eh_ escalations due to inability to obtain IOCB
pkt for marker.

v2.
- Remove define not used anymore and fix req_q_coun accounting.

Signed-off-by: Karen Higgins <karen.higgins@qlogic.com>
[michaelc: ported patch from qlogic.com driver to upstream]
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-07-30 08:50:01 -05:00

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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
/*
* 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 Alias name size */
#define ISCSI_NAME_SIZE 0xE0 /* ISCSI Name size */
#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 */
/* Used for extended sense / status continuation */
uint8_t *req_sense_ptr;
uint16_t req_sense_len;
uint16_t reserved2;
};
/*
* Asynchronous Event Queue structure
*/
struct aen {
uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
};
struct ql4_aen_log {
int count;
struct aen entry[MAX_AEN_ENTRIES];
};
/*
* 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];
uint8_t isid[6];
};
/*
* 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
#include "ql4_fw.h"
#include "ql4_nvram.h"
/*
* Linux Host Adapter structure
*/
struct scsi_qla_host {
/* Linux adapter configuration data */
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 */
#define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
#define AF_LINK_UP 8 /* 0x00000100 */
#define AF_IRQ_ATTACHED 10 /* 0x00000400 */
#define AF_DISABLE_ACB_COMPLETE 11 /* 0x00000800 */
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 */
struct Scsi_Host *host; /* pointer to host data */
uint32_t tot_ddbs;
uint16_t iocb_cnt;
/* 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;
uint32_t board_id;
/* --- 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 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];
struct ql4_aen_log aen_log;/* tracks all aens */
/* 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];
/* Saved srb for status continuation entry processing */
struct srb *status_srb;
};
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
#endif /*_QLA4XXX_H */
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