2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
5 * See LICENSE.qla4xxx for copyright and licensing details.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/types.h>
14 #include <linux/module.h>
15 #include <linux/list.h>
16 #include <linux/pci.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/sched.h>
19 #include <linux/slab.h>
20 #include <linux/dmapool.h>
21 #include <linux/mempool.h>
22 #include <linux/spinlock.h>
23 #include <linux/workqueue.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/mutex.h>
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_cmnd.h>
33 #include <scsi/scsi_transport.h>
34 #include <scsi/scsi_transport_iscsi.h>
37 #ifndef PCI_DEVICE_ID_QLOGIC_ISP4010
38 #define PCI_DEVICE_ID_QLOGIC_ISP4010 0x4010
41 #ifndef PCI_DEVICE_ID_QLOGIC_ISP4022
42 #define PCI_DEVICE_ID_QLOGIC_ISP4022 0x4022
45 #ifndef PCI_DEVICE_ID_QLOGIC_ISP4032
46 #define PCI_DEVICE_ID_QLOGIC_ISP4032 0x4032
53 * Data bit definitions
71 #define BIT_16 0x10000
72 #define BIT_17 0x20000
73 #define BIT_18 0x40000
74 #define BIT_19 0x80000
75 #define BIT_20 0x100000
76 #define BIT_21 0x200000
77 #define BIT_22 0x400000
78 #define BIT_23 0x800000
79 #define BIT_24 0x1000000
80 #define BIT_25 0x2000000
81 #define BIT_26 0x4000000
82 #define BIT_27 0x8000000
83 #define BIT_28 0x10000000
84 #define BIT_29 0x20000000
85 #define BIT_30 0x40000000
86 #define BIT_31 0x80000000
89 * Host adapter default definitions
90 ***********************************/
93 #define MAX_TARGETS (MAX_PRST_DEV_DB_ENTRIES + MAX_DEV_DB_ENTRIES)
94 #define MAX_LUNS 0xffff
95 #define MAX_AEN_ENTRIES 256 /* should be > EXT_DEF_MAX_AEN_QUEUE */
96 #define MAX_DDB_ENTRIES (MAX_PRST_DEV_DB_ENTRIES + MAX_DEV_DB_ENTRIES)
97 #define MAX_PDU_ENTRIES 32
98 #define INVALID_ENTRY 0xFFFF
99 #define MAX_CMDS_TO_RISC 1024
100 #define MAX_SRBS MAX_CMDS_TO_RISC
101 #define MBOX_AEN_REG_COUNT 5
102 #define MAX_INIT_RETRIES 5
107 #define REQUEST_QUEUE_DEPTH MAX_CMDS_TO_RISC
108 #define RESPONSE_QUEUE_DEPTH 64
109 #define QUEUE_SIZE 64
110 #define DMA_BUFFER_SIZE 512
115 #define MAC_ADDR_LEN 6 /* in bytes */
116 #define IP_ADDR_LEN 4 /* in bytes */
117 #define IPv6_ADDR_LEN 16 /* IPv6 address size */
118 #define DRIVER_NAME "qla4xxx"
120 #define MAX_LINKED_CMDS_PER_LUN 3
121 #define MAX_REQS_SERVICED_PER_INTR 16
123 #define ISCSI_IPADDR_SIZE 4 /* IP address size */
124 #define ISCSI_ALIAS_SIZE 32 /* ISCSI Alias name size */
125 #define ISCSI_NAME_SIZE 0xE0 /* ISCSI Name size */
127 #define LSDW(x) ((u32)((u64)(x)))
128 #define MSDW(x) ((u32)((((u64)(x)) >> 16) >> 16))
131 * Retry & Timeout Values
134 #define SOFT_RESET_TOV 30
135 #define RESET_INTR_TOV 3
136 #define SEMAPHORE_TOV 10
137 #define ADAPTER_INIT_TOV 120
138 #define ADAPTER_RESET_TOV 180
139 #define EXTEND_CMD_TOV 60
140 #define WAIT_CMD_TOV 30
141 #define EH_WAIT_CMD_TOV 120
142 #define FIRMWARE_UP_TOV 60
143 #define RESET_FIRMWARE_TOV 30
144 #define LOGOUT_TOV 10
145 #define IOCB_TOV_MARGIN 10
146 #define RELOGIN_TOV 18
147 #define ISNS_DEREG_TOV 5
149 #define MAX_RESET_HA_RETRIES 2
151 #define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
154 * SCSI Request Block structure (srb) that is placed
155 * on cmd->SCp location of every I/O [We have 22 bytes available]
158 struct list_head list
; /* (8) */
159 struct scsi_qla_host
*ha
; /* HA the SP is queued on */
160 struct ddb_entry
*ddb
;
161 uint16_t flags
; /* (1) Status flags. */
163 #define SRB_DMA_VALID BIT_3 /* DMA Buffer mapped. */
164 #define SRB_GOT_SENSE BIT_4 /* sense data recieved. */
165 uint8_t state
; /* (1) Status flags. */
167 #define SRB_NO_QUEUE_STATE 0 /* Request is in between states */
168 #define SRB_FREE_STATE 1
169 #define SRB_ACTIVE_STATE 3
170 #define SRB_ACTIVE_TIMEOUT_STATE 4
171 #define SRB_SUSPENDED_STATE 7 /* Request in suspended state */
173 struct scsi_cmnd
*cmd
; /* (4) SCSI command block */
174 dma_addr_t dma_handle
; /* (4) for unmap of single transfers */
175 struct kref srb_ref
; /* reference count for this srb */
176 uint32_t fw_ddb_index
;
177 uint8_t err_id
; /* error id */
178 #define SRB_ERR_PORT 1 /* Request failed because "port down" */
179 #define SRB_ERR_LOOP 2 /* Request failed because "loop down" */
180 #define SRB_ERR_DEVICE 3 /* Request failed because "device error" */
181 #define SRB_ERR_OTHER 4
185 uint16_t iocb_cnt
; /* Number of used iocbs */
187 u_long r_start
; /* Time we recieve a cmd from OS */
188 u_long u_start
; /* Time when we handed the cmd to F/W */
190 /* Used for extended sense / status continuation */
191 uint8_t *req_sense_ptr
;
192 uint16_t req_sense_len
;
197 * Asynchronous Event Queue structure
200 uint32_t mbox_sts
[MBOX_AEN_REG_COUNT
];
205 struct aen entry
[MAX_AEN_ENTRIES
];
209 * Device Database (DDB) structure
212 struct list_head list
; /* ddb list */
213 struct scsi_qla_host
*ha
;
214 struct iscsi_cls_session
*sess
;
215 struct iscsi_cls_conn
*conn
;
217 atomic_t state
; /* DDB State */
219 unsigned long flags
; /* DDB Flags */
221 unsigned long dev_scan_wait_to_start_relogin
;
222 unsigned long dev_scan_wait_to_complete_relogin
;
224 uint16_t os_target_id
; /* Target ID */
225 uint16_t fw_ddb_index
; /* DDB firmware index */
227 uint32_t fw_ddb_device_state
; /* F/W Device State -- see ql4_fw.h */
230 uint16_t target_session_id
;
231 uint16_t connection_id
;
232 uint16_t exe_throttle
; /* Max mumber of cmds outstanding
234 uint16_t task_mgmt_timeout
; /* Min time for task mgmt cmds to
236 uint16_t default_relogin_timeout
; /* Max time to wait for
237 * relogin to complete */
238 uint16_t tcp_source_port_num
;
239 uint32_t default_time2wait
; /* Default Min time between
240 * relogins (+aens) */
242 atomic_t port_down_timer
; /* Device connection timer */
243 atomic_t retry_relogin_timer
; /* Min Time between relogins
245 atomic_t relogin_timer
; /* Max Time to wait for relogin to complete */
246 atomic_t relogin_retry_count
; /* Num of times relogin has been
251 uint8_t ip_addr
[IP_ADDR_LEN
];
252 uint8_t iscsi_name
[ISCSI_NAME_SIZE
]; /* 72 x48 */
253 uint8_t iscsi_alias
[0x20];
255 uint16_t iscsi_max_burst_len
;
256 uint16_t iscsi_max_outsnd_r2t
;
257 uint16_t iscsi_first_burst_len
;
258 uint16_t iscsi_max_rcv_data_seg_len
;
259 uint16_t iscsi_max_snd_data_seg_len
;
261 struct in6_addr remote_ipv6_addr
;
262 struct in6_addr link_local_ipv6_addr
;
268 #define DDB_STATE_DEAD 0 /* We can no longer talk to
270 #define DDB_STATE_ONLINE 1 /* Device ready to accept
272 #define DDB_STATE_MISSING 2 /* Device logged off, trying
278 #define DF_RELOGIN 0 /* Relogin to device */
279 #define DF_NO_RELOGIN 1 /* Do not relogin if IOCTL
281 #define DF_ISNS_DISCOVERED 2 /* Device was discovered via iSNS */
282 #define DF_FO_MASKED 3
286 #include "ql4_nvram.h"
289 * Linux Host Adapter structure
291 struct scsi_qla_host
{
292 /* Linux adapter configuration data */
295 #define AF_ONLINE 0 /* 0x00000001 */
296 #define AF_INIT_DONE 1 /* 0x00000002 */
297 #define AF_MBOX_COMMAND 2 /* 0x00000004 */
298 #define AF_MBOX_COMMAND_DONE 3 /* 0x00000008 */
299 #define AF_INTERRUPTS_ON 6 /* 0x00000040 */
300 #define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
301 #define AF_LINK_UP 8 /* 0x00000100 */
302 #define AF_IRQ_ATTACHED 10 /* 0x00000400 */
303 #define AF_DISABLE_ACB_COMPLETE 11 /* 0x00000800 */
305 unsigned long dpc_flags
;
307 #define DPC_RESET_HA 1 /* 0x00000002 */
308 #define DPC_RETRY_RESET_HA 2 /* 0x00000004 */
309 #define DPC_RELOGIN_DEVICE 3 /* 0x00000008 */
310 #define DPC_RESET_HA_DESTROY_DDB_LIST 4 /* 0x00000010 */
311 #define DPC_RESET_HA_INTR 5 /* 0x00000020 */
312 #define DPC_ISNS_RESTART 7 /* 0x00000080 */
313 #define DPC_AEN 9 /* 0x00000200 */
314 #define DPC_GET_DHCP_IP_ADDR 15 /* 0x00008000 */
315 #define DPC_LINK_CHANGED 18 /* 0x00040000 */
317 struct Scsi_Host
*host
; /* pointer to host data */
323 #define SRB_MIN_REQ 128
324 mempool_t
*srb_mempool
;
326 /* pci information */
327 struct pci_dev
*pdev
;
329 struct isp_reg __iomem
*reg
; /* Base I/O address */
330 unsigned long pio_address
;
331 unsigned long pio_length
;
332 #define MIN_IOBASE_LEN 0x100
334 uint16_t req_q_count
;
337 unsigned long host_no
;
339 /* NVRAM registers */
340 struct eeprom_data
*nvram
;
341 spinlock_t hardware_lock ____cacheline_aligned
;
342 uint32_t eeprom_cmd_data
;
344 /* Counters for general statistics */
346 uint64_t adapter_error_count
;
347 uint64_t device_error_count
;
348 uint64_t total_io_count
;
349 uint64_t total_mbytes_xferred
;
350 uint64_t link_failure_count
;
351 uint64_t invalid_crc_count
;
352 uint32_t bytes_xfered
;
353 uint32_t spurious_int_count
;
354 uint32_t aborted_io_count
;
355 uint32_t io_timeout_count
;
356 uint32_t mailbox_timeout_count
;
357 uint32_t seconds_since_last_intr
;
358 uint32_t seconds_since_last_heartbeat
;
361 /* Info Needed for Management App */
362 /* --- From GetFwVersion --- */
363 uint32_t firmware_version
[2];
364 uint32_t patch_number
;
365 uint32_t build_number
;
368 /* --- From Init_FW --- */
369 /* init_cb_t *init_cb; */
370 uint16_t firmware_options
;
371 uint16_t tcp_options
;
372 uint8_t ip_address
[IP_ADDR_LEN
];
373 uint8_t subnet_mask
[IP_ADDR_LEN
];
374 uint8_t gateway
[IP_ADDR_LEN
];
376 uint8_t name_string
[256];
377 uint8_t heartbeat_interval
;
380 /* --- From FlashSysInfo --- */
381 uint8_t my_mac
[MAC_ADDR_LEN
];
382 uint8_t serial_number
[16];
384 /* --- From GetFwState --- */
385 uint32_t firmware_state
;
386 uint32_t addl_fw_state
;
388 /* Linux kernel thread */
389 struct workqueue_struct
*dpc_thread
;
390 struct work_struct dpc_work
;
392 /* Linux timer thread */
393 struct timer_list timer
;
394 uint32_t timer_active
;
396 /* Recovery Timers */
397 uint32_t port_down_retry_count
;
398 uint32_t discovery_wait
;
399 atomic_t check_relogin_timeouts
;
400 uint32_t retry_reset_ha_cnt
;
401 uint32_t isp_reset_timer
; /* reset test timer */
402 uint32_t nic_reset_timer
; /* simulated nic reset test timer */
404 struct list_head free_srb_q
;
405 uint16_t free_srb_q_count
;
406 uint16_t num_srbs_allocated
;
408 /* DMA Memory Block */
410 dma_addr_t queues_dma
;
411 unsigned long queues_len
;
413 #define MEM_ALIGN_VALUE \
414 ((max(REQUEST_QUEUE_DEPTH, RESPONSE_QUEUE_DEPTH)) * \
415 sizeof(struct queue_entry))
416 /* request and response queue variables */
417 dma_addr_t request_dma
;
418 struct queue_entry
*request_ring
;
419 struct queue_entry
*request_ptr
;
420 dma_addr_t response_dma
;
421 struct queue_entry
*response_ring
;
422 struct queue_entry
*response_ptr
;
423 dma_addr_t shadow_regs_dma
;
424 struct shadow_regs
*shadow_regs
;
425 uint16_t request_in
; /* Current indexes. */
426 uint16_t request_out
;
427 uint16_t response_in
;
428 uint16_t response_out
;
430 /* aen queue variables */
431 uint16_t aen_q_count
; /* Number of available aen_q entries */
432 uint16_t aen_in
; /* Current indexes */
434 struct aen aen_q
[MAX_AEN_ENTRIES
];
436 struct ql4_aen_log aen_log
;/* tracks all aens */
438 /* This mutex protects several threads to do mailbox commands
441 struct mutex mbox_sem
;
443 /* temporary mailbox status registers */
444 volatile uint8_t mbox_status_count
;
445 volatile uint32_t mbox_status
[MBOX_REG_COUNT
];
447 /* local device database list (contains internal ddb entries) */
448 struct list_head ddb_list
;
450 /* Map ddb_list entry by FW ddb index */
451 struct ddb_entry
*fw_ddb_index_map
[MAX_DDB_ENTRIES
];
453 /* Saved srb for status continuation entry processing */
454 struct srb
*status_srb
;
456 /* IPv6 support info from InitFW */
458 uint8_t ipv4_addr_state
;
459 uint16_t ipv4_options
;
462 uint32_t ipv6_options
;
463 uint32_t ipv6_addl_options
;
464 uint8_t ipv6_link_local_state
;
465 uint8_t ipv6_addr0_state
;
466 uint8_t ipv6_addr1_state
;
467 uint8_t ipv6_default_router_state
;
468 struct in6_addr ipv6_link_local_addr
;
469 struct in6_addr ipv6_addr0
;
470 struct in6_addr ipv6_addr1
;
471 struct in6_addr ipv6_default_router_addr
;
474 static inline int is_ipv4_enabled(struct scsi_qla_host
*ha
)
476 return ((ha
->ipv4_options
& IPOPT_IPv4_PROTOCOL_ENABLE
) != 0);
479 static inline int is_ipv6_enabled(struct scsi_qla_host
*ha
)
481 return ((ha
->ipv6_options
& IPV6_OPT_IPV6_PROTOCOL_ENABLE
) != 0);
484 static inline int is_qla4010(struct scsi_qla_host
*ha
)
486 return ha
->pdev
->device
== PCI_DEVICE_ID_QLOGIC_ISP4010
;
489 static inline int is_qla4022(struct scsi_qla_host
*ha
)
491 return ha
->pdev
->device
== PCI_DEVICE_ID_QLOGIC_ISP4022
;
494 static inline int is_qla4032(struct scsi_qla_host
*ha
)
496 return ha
->pdev
->device
== PCI_DEVICE_ID_QLOGIC_ISP4032
;
499 static inline int adapter_up(struct scsi_qla_host
*ha
)
501 return (test_bit(AF_ONLINE
, &ha
->flags
) != 0) &&
502 (test_bit(AF_LINK_UP
, &ha
->flags
) != 0);
505 static inline struct scsi_qla_host
* to_qla_host(struct Scsi_Host
*shost
)
507 return (struct scsi_qla_host
*)shost
->hostdata
;
510 static inline void __iomem
* isp_semaphore(struct scsi_qla_host
*ha
)
512 return (is_qla4010(ha
) ?
513 &ha
->reg
->u1
.isp4010
.nvram
:
514 &ha
->reg
->u1
.isp4022
.semaphore
);
517 static inline void __iomem
* isp_nvram(struct scsi_qla_host
*ha
)
519 return (is_qla4010(ha
) ?
520 &ha
->reg
->u1
.isp4010
.nvram
:
521 &ha
->reg
->u1
.isp4022
.nvram
);
524 static inline void __iomem
* isp_ext_hw_conf(struct scsi_qla_host
*ha
)
526 return (is_qla4010(ha
) ?
527 &ha
->reg
->u2
.isp4010
.ext_hw_conf
:
528 &ha
->reg
->u2
.isp4022
.p0
.ext_hw_conf
);
531 static inline void __iomem
* isp_port_status(struct scsi_qla_host
*ha
)
533 return (is_qla4010(ha
) ?
534 &ha
->reg
->u2
.isp4010
.port_status
:
535 &ha
->reg
->u2
.isp4022
.p0
.port_status
);
538 static inline void __iomem
* isp_port_ctrl(struct scsi_qla_host
*ha
)
540 return (is_qla4010(ha
) ?
541 &ha
->reg
->u2
.isp4010
.port_ctrl
:
542 &ha
->reg
->u2
.isp4022
.p0
.port_ctrl
);
545 static inline void __iomem
* isp_port_error_status(struct scsi_qla_host
*ha
)
547 return (is_qla4010(ha
) ?
548 &ha
->reg
->u2
.isp4010
.port_err_status
:
549 &ha
->reg
->u2
.isp4022
.p0
.port_err_status
);
552 static inline void __iomem
* isp_gp_out(struct scsi_qla_host
*ha
)
554 return (is_qla4010(ha
) ?
555 &ha
->reg
->u2
.isp4010
.gp_out
:
556 &ha
->reg
->u2
.isp4022
.p0
.gp_out
);
559 static inline int eeprom_ext_hw_conf_offset(struct scsi_qla_host
*ha
)
561 return (is_qla4010(ha
) ?
562 offsetof(struct eeprom_data
, isp4010
.ext_hw_conf
) / 2 :
563 offsetof(struct eeprom_data
, isp4022
.ext_hw_conf
) / 2);
566 int ql4xxx_sem_spinlock(struct scsi_qla_host
* ha
, u32 sem_mask
, u32 sem_bits
);
567 void ql4xxx_sem_unlock(struct scsi_qla_host
* ha
, u32 sem_mask
);
568 int ql4xxx_sem_lock(struct scsi_qla_host
* ha
, u32 sem_mask
, u32 sem_bits
);
570 static inline int ql4xxx_lock_flash(struct scsi_qla_host
*a
)
573 return ql4xxx_sem_spinlock(a
, QL4010_FLASH_SEM_MASK
,
574 QL4010_FLASH_SEM_BITS
);
576 return ql4xxx_sem_spinlock(a
, QL4022_FLASH_SEM_MASK
,
577 (QL4022_RESOURCE_BITS_BASE_CODE
|
578 (a
->mac_index
)) << 13);
581 static inline void ql4xxx_unlock_flash(struct scsi_qla_host
*a
)
584 ql4xxx_sem_unlock(a
, QL4010_FLASH_SEM_MASK
);
586 ql4xxx_sem_unlock(a
, QL4022_FLASH_SEM_MASK
);
589 static inline int ql4xxx_lock_nvram(struct scsi_qla_host
*a
)
592 return ql4xxx_sem_spinlock(a
, QL4010_NVRAM_SEM_MASK
,
593 QL4010_NVRAM_SEM_BITS
);
595 return ql4xxx_sem_spinlock(a
, QL4022_NVRAM_SEM_MASK
,
596 (QL4022_RESOURCE_BITS_BASE_CODE
|
597 (a
->mac_index
)) << 10);
600 static inline void ql4xxx_unlock_nvram(struct scsi_qla_host
*a
)
603 ql4xxx_sem_unlock(a
, QL4010_NVRAM_SEM_MASK
);
605 ql4xxx_sem_unlock(a
, QL4022_NVRAM_SEM_MASK
);
608 static inline int ql4xxx_lock_drvr(struct scsi_qla_host
*a
)
611 return ql4xxx_sem_lock(a
, QL4010_DRVR_SEM_MASK
,
612 QL4010_DRVR_SEM_BITS
);
614 return ql4xxx_sem_lock(a
, QL4022_DRVR_SEM_MASK
,
615 (QL4022_RESOURCE_BITS_BASE_CODE
|
616 (a
->mac_index
)) << 1);
619 static inline void ql4xxx_unlock_drvr(struct scsi_qla_host
*a
)
622 ql4xxx_sem_unlock(a
, QL4010_DRVR_SEM_MASK
);
624 ql4xxx_sem_unlock(a
, QL4022_DRVR_SEM_MASK
);
627 /*---------------------------------------------------------------------------*/
629 /* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */
630 #define PRESERVE_DDB_LIST 0
631 #define REBUILD_DDB_LIST 1
633 /* Defines for process_aen() */
634 #define PROCESS_ALL_AENS 0
635 #define FLUSH_DDB_CHANGED_AENS 1
636 #define RELOGIN_DDB_CHANGED_AENS 2
638 #endif /*_QLA4XXX_H */