[PATCH] IPV6: Do no rely on skb->dst before it is assigned.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / qla4xxx / ql4_def.h
blob6f4cf2dd2f4a45a2cdf258471db05090bd2fb01a
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
8 #ifndef __QL4_DEF_H
9 #define __QL4_DEF_H
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>
28 #include <net/tcp.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
39 #endif
41 #ifndef PCI_DEVICE_ID_QLOGIC_ISP4022
42 #define PCI_DEVICE_ID_QLOGIC_ISP4022 0x4022
43 #endif
45 #ifndef PCI_DEVICE_ID_QLOGIC_ISP4032
46 #define PCI_DEVICE_ID_QLOGIC_ISP4032 0x4032
47 #endif
49 #define QLA_SUCCESS 0
50 #define QLA_ERROR 1
53 * Data bit definitions
55 #define BIT_0 0x1
56 #define BIT_1 0x2
57 #define BIT_2 0x4
58 #define BIT_3 0x8
59 #define BIT_4 0x10
60 #define BIT_5 0x20
61 #define BIT_6 0x40
62 #define BIT_7 0x80
63 #define BIT_8 0x100
64 #define BIT_9 0x200
65 #define BIT_10 0x400
66 #define BIT_11 0x800
67 #define BIT_12 0x1000
68 #define BIT_13 0x2000
69 #define BIT_14 0x4000
70 #define BIT_15 0x8000
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 ***********************************/
91 #define MAX_HBAS 16
92 #define MAX_BUSES 1
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
103 #define IOCB_HIWAT_CUSHION 16
106 * Buffer sizes
108 #define REQUEST_QUEUE_DEPTH MAX_CMDS_TO_RISC
109 #define RESPONSE_QUEUE_DEPTH 64
110 #define QUEUE_SIZE 64
111 #define DMA_BUFFER_SIZE 512
114 * Misc
116 #define MAC_ADDR_LEN 6 /* in bytes */
117 #define IP_ADDR_LEN 4 /* in bytes */
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 Alais name size */
125 #define ISCSI_NAME_SIZE 255 /* ISCSI Name size -
126 * usually a string */
128 #define LSDW(x) ((u32)((u64)(x)))
129 #define MSDW(x) ((u32)((((u64)(x)) >> 16) >> 16))
132 * Retry & Timeout Values
134 #define MBOX_TOV 60
135 #define SOFT_RESET_TOV 30
136 #define RESET_INTR_TOV 3
137 #define SEMAPHORE_TOV 10
138 #define ADAPTER_INIT_TOV 120
139 #define ADAPTER_RESET_TOV 180
140 #define EXTEND_CMD_TOV 60
141 #define WAIT_CMD_TOV 30
142 #define EH_WAIT_CMD_TOV 120
143 #define FIRMWARE_UP_TOV 60
144 #define RESET_FIRMWARE_TOV 30
145 #define LOGOUT_TOV 10
146 #define IOCB_TOV_MARGIN 10
147 #define RELOGIN_TOV 18
148 #define ISNS_DEREG_TOV 5
150 #define MAX_RESET_HA_RETRIES 2
153 * SCSI Request Block structure (srb) that is placed
154 * on cmd->SCp location of every I/O [We have 22 bytes available]
156 struct srb {
157 struct list_head list; /* (8) */
158 struct scsi_qla_host *ha; /* HA the SP is queued on */
159 struct ddb_entry *ddb;
160 uint16_t flags; /* (1) Status flags. */
162 #define SRB_DMA_VALID BIT_3 /* DMA Buffer mapped. */
163 #define SRB_GOT_SENSE BIT_4 /* sense data recieved. */
164 uint8_t state; /* (1) Status flags. */
166 #define SRB_NO_QUEUE_STATE 0 /* Request is in between states */
167 #define SRB_FREE_STATE 1
168 #define SRB_ACTIVE_STATE 3
169 #define SRB_ACTIVE_TIMEOUT_STATE 4
170 #define SRB_SUSPENDED_STATE 7 /* Request in suspended state */
172 struct scsi_cmnd *cmd; /* (4) SCSI command block */
173 dma_addr_t dma_handle; /* (4) for unmap of single transfers */
174 atomic_t ref_count; /* reference count for this srb */
175 uint32_t fw_ddb_index;
176 uint8_t err_id; /* error id */
177 #define SRB_ERR_PORT 1 /* Request failed because "port down" */
178 #define SRB_ERR_LOOP 2 /* Request failed because "loop down" */
179 #define SRB_ERR_DEVICE 3 /* Request failed because "device error" */
180 #define SRB_ERR_OTHER 4
182 uint16_t reserved;
183 uint16_t iocb_tov;
184 uint16_t iocb_cnt; /* Number of used iocbs */
185 uint16_t cc_stat;
186 u_long r_start; /* Time we recieve a cmd from OS */
187 u_long u_start; /* Time when we handed the cmd to F/W */
191 * Device Database (DDB) structure
193 struct ddb_entry {
194 struct list_head list; /* ddb list */
195 struct scsi_qla_host *ha;
196 struct iscsi_cls_session *sess;
197 struct iscsi_cls_conn *conn;
199 atomic_t state; /* DDB State */
201 unsigned long flags; /* DDB Flags */
203 unsigned long dev_scan_wait_to_start_relogin;
204 unsigned long dev_scan_wait_to_complete_relogin;
206 uint16_t os_target_id; /* Target ID */
207 uint16_t fw_ddb_index; /* DDB firmware index */
208 uint8_t reserved[2];
209 uint32_t fw_ddb_device_state; /* F/W Device State -- see ql4_fw.h */
211 uint32_t CmdSn;
212 uint16_t target_session_id;
213 uint16_t connection_id;
214 uint16_t exe_throttle; /* Max mumber of cmds outstanding
215 * simultaneously */
216 uint16_t task_mgmt_timeout; /* Min time for task mgmt cmds to
217 * complete */
218 uint16_t default_relogin_timeout; /* Max time to wait for
219 * relogin to complete */
220 uint16_t tcp_source_port_num;
221 uint32_t default_time2wait; /* Default Min time between
222 * relogins (+aens) */
224 atomic_t port_down_timer; /* Device connection timer */
225 atomic_t retry_relogin_timer; /* Min Time between relogins
226 * (4000 only) */
227 atomic_t relogin_timer; /* Max Time to wait for relogin to complete */
228 atomic_t relogin_retry_count; /* Num of times relogin has been
229 * retried */
231 uint16_t port;
232 uint32_t tpgt;
233 uint8_t ip_addr[ISCSI_IPADDR_SIZE];
234 uint8_t iscsi_name[ISCSI_NAME_SIZE]; /* 72 x48 */
235 uint8_t iscsi_alias[0x20];
239 * DDB states.
241 #define DDB_STATE_DEAD 0 /* We can no longer talk to
242 * this device */
243 #define DDB_STATE_ONLINE 1 /* Device ready to accept
244 * commands */
245 #define DDB_STATE_MISSING 2 /* Device logged off, trying
246 * to re-login */
249 * DDB flags.
251 #define DF_RELOGIN 0 /* Relogin to device */
252 #define DF_NO_RELOGIN 1 /* Do not relogin if IOCTL
253 * logged it out */
254 #define DF_ISNS_DISCOVERED 2 /* Device was discovered via iSNS */
255 #define DF_FO_MASKED 3
258 * Asynchronous Event Queue structure
260 struct aen {
261 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
265 #include "ql4_fw.h"
266 #include "ql4_nvram.h"
269 * Linux Host Adapter structure
271 struct scsi_qla_host {
272 /* Linux adapter configuration data */
273 struct Scsi_Host *host; /* pointer to host data */
274 uint32_t tot_ddbs;
275 unsigned long flags;
277 #define AF_ONLINE 0 /* 0x00000001 */
278 #define AF_INIT_DONE 1 /* 0x00000002 */
279 #define AF_MBOX_COMMAND 2 /* 0x00000004 */
280 #define AF_MBOX_COMMAND_DONE 3 /* 0x00000008 */
281 #define AF_INTERRUPTS_ON 6 /* 0x00000040 Not Used */
282 #define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
283 #define AF_LINK_UP 8 /* 0x00000100 */
284 #define AF_IRQ_ATTACHED 10 /* 0x00000400 */
285 #define AF_ISNS_CMD_IN_PROCESS 12 /* 0x00001000 */
286 #define AF_ISNS_CMD_DONE 13 /* 0x00002000 */
288 unsigned long dpc_flags;
290 #define DPC_RESET_HA 1 /* 0x00000002 */
291 #define DPC_RETRY_RESET_HA 2 /* 0x00000004 */
292 #define DPC_RELOGIN_DEVICE 3 /* 0x00000008 */
293 #define DPC_RESET_HA_DESTROY_DDB_LIST 4 /* 0x00000010 */
294 #define DPC_RESET_HA_INTR 5 /* 0x00000020 */
295 #define DPC_ISNS_RESTART 7 /* 0x00000080 */
296 #define DPC_AEN 9 /* 0x00000200 */
297 #define DPC_GET_DHCP_IP_ADDR 15 /* 0x00008000 */
299 uint16_t iocb_cnt;
300 uint16_t iocb_hiwat;
302 /* SRB cache. */
303 #define SRB_MIN_REQ 128
304 mempool_t *srb_mempool;
306 /* pci information */
307 struct pci_dev *pdev;
309 struct isp_reg __iomem *reg; /* Base I/O address */
310 unsigned long pio_address;
311 unsigned long pio_length;
312 #define MIN_IOBASE_LEN 0x100
314 uint16_t req_q_count;
315 uint8_t marker_needed;
316 uint8_t rsvd1;
318 unsigned long host_no;
320 /* NVRAM registers */
321 struct eeprom_data *nvram;
322 spinlock_t hardware_lock ____cacheline_aligned;
323 uint32_t eeprom_cmd_data;
325 /* Counters for general statistics */
326 uint64_t isr_count;
327 uint64_t adapter_error_count;
328 uint64_t device_error_count;
329 uint64_t total_io_count;
330 uint64_t total_mbytes_xferred;
331 uint64_t link_failure_count;
332 uint64_t invalid_crc_count;
333 uint32_t bytes_xfered;
334 uint32_t spurious_int_count;
335 uint32_t aborted_io_count;
336 uint32_t io_timeout_count;
337 uint32_t mailbox_timeout_count;
338 uint32_t seconds_since_last_intr;
339 uint32_t seconds_since_last_heartbeat;
340 uint32_t mac_index;
342 /* Info Needed for Management App */
343 /* --- From GetFwVersion --- */
344 uint32_t firmware_version[2];
345 uint32_t patch_number;
346 uint32_t build_number;
348 /* --- From Init_FW --- */
349 /* init_cb_t *init_cb; */
350 uint16_t firmware_options;
351 uint16_t tcp_options;
352 uint8_t ip_address[IP_ADDR_LEN];
353 uint8_t subnet_mask[IP_ADDR_LEN];
354 uint8_t gateway[IP_ADDR_LEN];
355 uint8_t alias[32];
356 uint8_t name_string[256];
357 uint8_t heartbeat_interval;
358 uint8_t rsvd;
360 /* --- From FlashSysInfo --- */
361 uint8_t my_mac[MAC_ADDR_LEN];
362 uint8_t serial_number[16];
364 /* --- From GetFwState --- */
365 uint32_t firmware_state;
366 uint32_t board_id;
367 uint32_t addl_fw_state;
369 /* Linux kernel thread */
370 struct workqueue_struct *dpc_thread;
371 struct work_struct dpc_work;
373 /* Linux timer thread */
374 struct timer_list timer;
375 uint32_t timer_active;
377 /* Recovery Timers */
378 uint32_t port_down_retry_count;
379 uint32_t discovery_wait;
380 atomic_t check_relogin_timeouts;
381 uint32_t retry_reset_ha_cnt;
382 uint32_t isp_reset_timer; /* reset test timer */
383 uint32_t nic_reset_timer; /* simulated nic reset test timer */
384 int eh_start;
385 struct list_head free_srb_q;
386 uint16_t free_srb_q_count;
387 uint16_t num_srbs_allocated;
389 /* DMA Memory Block */
390 void *queues;
391 dma_addr_t queues_dma;
392 unsigned long queues_len;
394 #define MEM_ALIGN_VALUE \
395 ((max(REQUEST_QUEUE_DEPTH, RESPONSE_QUEUE_DEPTH)) * \
396 sizeof(struct queue_entry))
397 /* request and response queue variables */
398 dma_addr_t request_dma;
399 struct queue_entry *request_ring;
400 struct queue_entry *request_ptr;
401 dma_addr_t response_dma;
402 struct queue_entry *response_ring;
403 struct queue_entry *response_ptr;
404 dma_addr_t shadow_regs_dma;
405 struct shadow_regs *shadow_regs;
406 uint16_t request_in; /* Current indexes. */
407 uint16_t request_out;
408 uint16_t response_in;
409 uint16_t response_out;
411 /* aen queue variables */
412 uint16_t aen_q_count; /* Number of available aen_q entries */
413 uint16_t aen_in; /* Current indexes */
414 uint16_t aen_out;
415 struct aen aen_q[MAX_AEN_ENTRIES];
417 /* This mutex protects several threads to do mailbox commands
418 * concurrently.
420 struct mutex mbox_sem;
422 /* temporary mailbox status registers */
423 volatile uint8_t mbox_status_count;
424 volatile uint32_t mbox_status[MBOX_REG_COUNT];
426 /* local device database list (contains internal ddb entries) */
427 struct list_head ddb_list;
429 /* Map ddb_list entry by FW ddb index */
430 struct ddb_entry *fw_ddb_index_map[MAX_DDB_ENTRIES];
434 static inline int is_qla4010(struct scsi_qla_host *ha)
436 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4010;
439 static inline int is_qla4022(struct scsi_qla_host *ha)
441 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4022;
444 static inline int is_qla4032(struct scsi_qla_host *ha)
446 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4032;
449 static inline int adapter_up(struct scsi_qla_host *ha)
451 return (test_bit(AF_ONLINE, &ha->flags) != 0) &&
452 (test_bit(AF_LINK_UP, &ha->flags) != 0);
455 static inline struct scsi_qla_host* to_qla_host(struct Scsi_Host *shost)
457 return (struct scsi_qla_host *)shost->hostdata;
460 static inline void __iomem* isp_semaphore(struct scsi_qla_host *ha)
462 return (is_qla4010(ha) ?
463 &ha->reg->u1.isp4010.nvram :
464 &ha->reg->u1.isp4022.semaphore);
467 static inline void __iomem* isp_nvram(struct scsi_qla_host *ha)
469 return (is_qla4010(ha) ?
470 &ha->reg->u1.isp4010.nvram :
471 &ha->reg->u1.isp4022.nvram);
474 static inline void __iomem* isp_ext_hw_conf(struct scsi_qla_host *ha)
476 return (is_qla4010(ha) ?
477 &ha->reg->u2.isp4010.ext_hw_conf :
478 &ha->reg->u2.isp4022.p0.ext_hw_conf);
481 static inline void __iomem* isp_port_status(struct scsi_qla_host *ha)
483 return (is_qla4010(ha) ?
484 &ha->reg->u2.isp4010.port_status :
485 &ha->reg->u2.isp4022.p0.port_status);
488 static inline void __iomem* isp_port_ctrl(struct scsi_qla_host *ha)
490 return (is_qla4010(ha) ?
491 &ha->reg->u2.isp4010.port_ctrl :
492 &ha->reg->u2.isp4022.p0.port_ctrl);
495 static inline void __iomem* isp_port_error_status(struct scsi_qla_host *ha)
497 return (is_qla4010(ha) ?
498 &ha->reg->u2.isp4010.port_err_status :
499 &ha->reg->u2.isp4022.p0.port_err_status);
502 static inline void __iomem * isp_gp_out(struct scsi_qla_host *ha)
504 return (is_qla4010(ha) ?
505 &ha->reg->u2.isp4010.gp_out :
506 &ha->reg->u2.isp4022.p0.gp_out);
509 static inline int eeprom_ext_hw_conf_offset(struct scsi_qla_host *ha)
511 return (is_qla4010(ha) ?
512 offsetof(struct eeprom_data, isp4010.ext_hw_conf) / 2 :
513 offsetof(struct eeprom_data, isp4022.ext_hw_conf) / 2);
516 int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
517 void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask);
518 int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
520 static inline int ql4xxx_lock_flash(struct scsi_qla_host *a)
522 if (is_qla4010(a))
523 return ql4xxx_sem_spinlock(a, QL4010_FLASH_SEM_MASK,
524 QL4010_FLASH_SEM_BITS);
525 else
526 return ql4xxx_sem_spinlock(a, QL4022_FLASH_SEM_MASK,
527 (QL4022_RESOURCE_BITS_BASE_CODE |
528 (a->mac_index)) << 13);
531 static inline void ql4xxx_unlock_flash(struct scsi_qla_host *a)
533 if (is_qla4010(a))
534 ql4xxx_sem_unlock(a, QL4010_FLASH_SEM_MASK);
535 else
536 ql4xxx_sem_unlock(a, QL4022_FLASH_SEM_MASK);
539 static inline int ql4xxx_lock_nvram(struct scsi_qla_host *a)
541 if (is_qla4010(a))
542 return ql4xxx_sem_spinlock(a, QL4010_NVRAM_SEM_MASK,
543 QL4010_NVRAM_SEM_BITS);
544 else
545 return ql4xxx_sem_spinlock(a, QL4022_NVRAM_SEM_MASK,
546 (QL4022_RESOURCE_BITS_BASE_CODE |
547 (a->mac_index)) << 10);
550 static inline void ql4xxx_unlock_nvram(struct scsi_qla_host *a)
552 if (is_qla4010(a))
553 ql4xxx_sem_unlock(a, QL4010_NVRAM_SEM_MASK);
554 else
555 ql4xxx_sem_unlock(a, QL4022_NVRAM_SEM_MASK);
558 static inline int ql4xxx_lock_drvr(struct scsi_qla_host *a)
560 if (is_qla4010(a))
561 return ql4xxx_sem_lock(a, QL4010_DRVR_SEM_MASK,
562 QL4010_DRVR_SEM_BITS);
563 else
564 return ql4xxx_sem_lock(a, QL4022_DRVR_SEM_MASK,
565 (QL4022_RESOURCE_BITS_BASE_CODE |
566 (a->mac_index)) << 1);
569 static inline void ql4xxx_unlock_drvr(struct scsi_qla_host *a)
571 if (is_qla4010(a))
572 ql4xxx_sem_unlock(a, QL4010_DRVR_SEM_MASK);
573 else
574 ql4xxx_sem_unlock(a, QL4022_DRVR_SEM_MASK);
577 /*---------------------------------------------------------------------------*/
579 /* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */
580 #define PRESERVE_DDB_LIST 0
581 #define REBUILD_DDB_LIST 1
583 /* Defines for process_aen() */
584 #define PROCESS_ALL_AENS 0
585 #define FLUSH_DDB_CHANGED_AENS 1
586 #define RELOGIN_DDB_CHANGED_AENS 2
588 #include "ql4_version.h"
589 #include "ql4_glbl.h"
590 #include "ql4_dbg.h"
591 #include "ql4_inline.h"
594 #endif /*_QLA4XXX_H */