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
103 #define IOCB_HIWAT_CUSHION 16
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
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 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
152 * SCSI Request Block structure (srb) that is placed
153 * on cmd->SCp location of every I/O [We have 22 bytes available]
156 struct list_head list; /* (8) */
157 struct scsi_qla_host *ha; /* HA the SP is queued on */
158 struct ddb_entry *ddb;
159 uint16_t flags; /* (1) Status flags. */
161 #define SRB_DMA_VALID BIT_3 /* DMA Buffer mapped. */
162 #define SRB_GOT_SENSE BIT_4 /* sense data recieved. */
163 uint8_t state; /* (1) Status flags. */
165 #define SRB_NO_QUEUE_STATE 0 /* Request is in between states */
166 #define SRB_FREE_STATE 1
167 #define SRB_ACTIVE_STATE 3
168 #define SRB_ACTIVE_TIMEOUT_STATE 4
169 #define SRB_SUSPENDED_STATE 7 /* Request in suspended state */
171 struct scsi_cmnd *cmd; /* (4) SCSI command block */
172 dma_addr_t dma_handle; /* (4) for unmap of single transfers */
173 atomic_t ref_count; /* reference count for this srb */
174 uint32_t fw_ddb_index;
175 uint8_t err_id; /* error id */
176 #define SRB_ERR_PORT 1 /* Request failed because "port down" */
177 #define SRB_ERR_LOOP 2 /* Request failed because "loop down" */
178 #define SRB_ERR_DEVICE 3 /* Request failed because "device error" */
179 #define SRB_ERR_OTHER 4
183 uint16_t iocb_cnt; /* Number of used iocbs */
185 u_long r_start; /* Time we recieve a cmd from OS */
186 u_long u_start; /* Time when we handed the cmd to F/W */
190 * Asynchronous Event Queue structure
193 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
198 struct aen entry[MAX_AEN_ENTRIES];
202 * Device Database (DDB) structure
205 struct list_head list; /* ddb list */
206 struct scsi_qla_host *ha;
207 struct iscsi_cls_session *sess;
208 struct iscsi_cls_conn *conn;
210 atomic_t state; /* DDB State */
212 unsigned long flags; /* DDB Flags */
214 unsigned long dev_scan_wait_to_start_relogin;
215 unsigned long dev_scan_wait_to_complete_relogin;
217 uint16_t os_target_id; /* Target ID */
218 uint16_t fw_ddb_index; /* DDB firmware index */
220 uint32_t fw_ddb_device_state; /* F/W Device State -- see ql4_fw.h */
223 uint16_t target_session_id;
224 uint16_t connection_id;
225 uint16_t exe_throttle; /* Max mumber of cmds outstanding
227 uint16_t task_mgmt_timeout; /* Min time for task mgmt cmds to
229 uint16_t default_relogin_timeout; /* Max time to wait for
230 * relogin to complete */
231 uint16_t tcp_source_port_num;
232 uint32_t default_time2wait; /* Default Min time between
233 * relogins (+aens) */
235 atomic_t port_down_timer; /* Device connection timer */
236 atomic_t retry_relogin_timer; /* Min Time between relogins
238 atomic_t relogin_timer; /* Max Time to wait for relogin to complete */
239 atomic_t relogin_retry_count; /* Num of times relogin has been
244 uint8_t ip_addr[ISCSI_IPADDR_SIZE];
245 uint8_t iscsi_name[ISCSI_NAME_SIZE]; /* 72 x48 */
246 uint8_t iscsi_alias[0x20];
252 #define DDB_STATE_DEAD 0 /* We can no longer talk to
254 #define DDB_STATE_ONLINE 1 /* Device ready to accept
256 #define DDB_STATE_MISSING 2 /* Device logged off, trying
262 #define DF_RELOGIN 0 /* Relogin to device */
263 #define DF_NO_RELOGIN 1 /* Do not relogin if IOCTL
265 #define DF_ISNS_DISCOVERED 2 /* Device was discovered via iSNS */
266 #define DF_FO_MASKED 3
270 #include "ql4_nvram.h"
273 * Linux Host Adapter structure
275 struct scsi_qla_host {
276 /* Linux adapter configuration data */
279 #define AF_ONLINE 0 /* 0x00000001 */
280 #define AF_INIT_DONE 1 /* 0x00000002 */
281 #define AF_MBOX_COMMAND 2 /* 0x00000004 */
282 #define AF_MBOX_COMMAND_DONE 3 /* 0x00000008 */
283 #define AF_INTERRUPTS_ON 6 /* 0x00000040 */
284 #define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
285 #define AF_LINK_UP 8 /* 0x00000100 */
286 #define AF_IRQ_ATTACHED 10 /* 0x00000400 */
287 #define AF_DISABLE_ACB_COMPLETE 11 /* 0x00000800 */
289 unsigned long dpc_flags;
291 #define DPC_RESET_HA 1 /* 0x00000002 */
292 #define DPC_RETRY_RESET_HA 2 /* 0x00000004 */
293 #define DPC_RELOGIN_DEVICE 3 /* 0x00000008 */
294 #define DPC_RESET_HA_DESTROY_DDB_LIST 4 /* 0x00000010 */
295 #define DPC_RESET_HA_INTR 5 /* 0x00000020 */
296 #define DPC_ISNS_RESTART 7 /* 0x00000080 */
297 #define DPC_AEN 9 /* 0x00000200 */
298 #define DPC_GET_DHCP_IP_ADDR 15 /* 0x00008000 */
300 struct Scsi_Host *host; /* pointer to host data */
307 #define SRB_MIN_REQ 128
308 mempool_t *srb_mempool;
310 /* pci information */
311 struct pci_dev *pdev;
313 struct isp_reg __iomem *reg; /* Base I/O address */
314 unsigned long pio_address;
315 unsigned long pio_length;
316 #define MIN_IOBASE_LEN 0x100
318 uint16_t req_q_count;
319 uint8_t marker_needed;
322 unsigned long host_no;
324 /* NVRAM registers */
325 struct eeprom_data *nvram;
326 spinlock_t hardware_lock ____cacheline_aligned;
327 uint32_t eeprom_cmd_data;
329 /* Counters for general statistics */
331 uint64_t adapter_error_count;
332 uint64_t device_error_count;
333 uint64_t total_io_count;
334 uint64_t total_mbytes_xferred;
335 uint64_t link_failure_count;
336 uint64_t invalid_crc_count;
337 uint32_t bytes_xfered;
338 uint32_t spurious_int_count;
339 uint32_t aborted_io_count;
340 uint32_t io_timeout_count;
341 uint32_t mailbox_timeout_count;
342 uint32_t seconds_since_last_intr;
343 uint32_t seconds_since_last_heartbeat;
346 /* Info Needed for Management App */
347 /* --- From GetFwVersion --- */
348 uint32_t firmware_version[2];
349 uint32_t patch_number;
350 uint32_t build_number;
353 /* --- From Init_FW --- */
354 /* init_cb_t *init_cb; */
355 uint16_t firmware_options;
356 uint16_t tcp_options;
357 uint8_t ip_address[IP_ADDR_LEN];
358 uint8_t subnet_mask[IP_ADDR_LEN];
359 uint8_t gateway[IP_ADDR_LEN];
361 uint8_t name_string[256];
362 uint8_t heartbeat_interval;
365 /* --- From FlashSysInfo --- */
366 uint8_t my_mac[MAC_ADDR_LEN];
367 uint8_t serial_number[16];
369 /* --- From GetFwState --- */
370 uint32_t firmware_state;
371 uint32_t addl_fw_state;
373 /* Linux kernel thread */
374 struct workqueue_struct *dpc_thread;
375 struct work_struct dpc_work;
377 /* Linux timer thread */
378 struct timer_list timer;
379 uint32_t timer_active;
381 /* Recovery Timers */
382 uint32_t port_down_retry_count;
383 uint32_t discovery_wait;
384 atomic_t check_relogin_timeouts;
385 uint32_t retry_reset_ha_cnt;
386 uint32_t isp_reset_timer; /* reset test timer */
387 uint32_t nic_reset_timer; /* simulated nic reset test timer */
389 struct list_head free_srb_q;
390 uint16_t free_srb_q_count;
391 uint16_t num_srbs_allocated;
393 /* DMA Memory Block */
395 dma_addr_t queues_dma;
396 unsigned long queues_len;
398 #define MEM_ALIGN_VALUE \
399 ((max(REQUEST_QUEUE_DEPTH, RESPONSE_QUEUE_DEPTH)) * \
400 sizeof(struct queue_entry))
401 /* request and response queue variables */
402 dma_addr_t request_dma;
403 struct queue_entry *request_ring;
404 struct queue_entry *request_ptr;
405 dma_addr_t response_dma;
406 struct queue_entry *response_ring;
407 struct queue_entry *response_ptr;
408 dma_addr_t shadow_regs_dma;
409 struct shadow_regs *shadow_regs;
410 uint16_t request_in; /* Current indexes. */
411 uint16_t request_out;
412 uint16_t response_in;
413 uint16_t response_out;
415 /* aen queue variables */
416 uint16_t aen_q_count; /* Number of available aen_q entries */
417 uint16_t aen_in; /* Current indexes */
419 struct aen aen_q[MAX_AEN_ENTRIES];
421 struct ql4_aen_log aen_log;/* tracks all aens */
423 /* This mutex protects several threads to do mailbox commands
426 struct mutex mbox_sem;
428 /* temporary mailbox status registers */
429 volatile uint8_t mbox_status_count;
430 volatile uint32_t mbox_status[MBOX_REG_COUNT];
432 /* local device database list (contains internal ddb entries) */
433 struct list_head ddb_list;
435 /* Map ddb_list entry by FW ddb index */
436 struct ddb_entry *fw_ddb_index_map[MAX_DDB_ENTRIES];
440 static inline int is_qla4010(struct scsi_qla_host *ha)
442 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4010;
445 static inline int is_qla4022(struct scsi_qla_host *ha)
447 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4022;
450 static inline int is_qla4032(struct scsi_qla_host *ha)
452 return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4032;
455 static inline int adapter_up(struct scsi_qla_host *ha)
457 return (test_bit(AF_ONLINE, &ha->flags) != 0) &&
458 (test_bit(AF_LINK_UP, &ha->flags) != 0);
461 static inline struct scsi_qla_host* to_qla_host(struct Scsi_Host *shost)
463 return (struct scsi_qla_host *)shost->hostdata;
466 static inline void __iomem* isp_semaphore(struct scsi_qla_host *ha)
468 return (is_qla4010(ha) ?
469 &ha->reg->u1.isp4010.nvram :
470 &ha->reg->u1.isp4022.semaphore);
473 static inline void __iomem* isp_nvram(struct scsi_qla_host *ha)
475 return (is_qla4010(ha) ?
476 &ha->reg->u1.isp4010.nvram :
477 &ha->reg->u1.isp4022.nvram);
480 static inline void __iomem* isp_ext_hw_conf(struct scsi_qla_host *ha)
482 return (is_qla4010(ha) ?
483 &ha->reg->u2.isp4010.ext_hw_conf :
484 &ha->reg->u2.isp4022.p0.ext_hw_conf);
487 static inline void __iomem* isp_port_status(struct scsi_qla_host *ha)
489 return (is_qla4010(ha) ?
490 &ha->reg->u2.isp4010.port_status :
491 &ha->reg->u2.isp4022.p0.port_status);
494 static inline void __iomem* isp_port_ctrl(struct scsi_qla_host *ha)
496 return (is_qla4010(ha) ?
497 &ha->reg->u2.isp4010.port_ctrl :
498 &ha->reg->u2.isp4022.p0.port_ctrl);
501 static inline void __iomem* isp_port_error_status(struct scsi_qla_host *ha)
503 return (is_qla4010(ha) ?
504 &ha->reg->u2.isp4010.port_err_status :
505 &ha->reg->u2.isp4022.p0.port_err_status);
508 static inline void __iomem * isp_gp_out(struct scsi_qla_host *ha)
510 return (is_qla4010(ha) ?
511 &ha->reg->u2.isp4010.gp_out :
512 &ha->reg->u2.isp4022.p0.gp_out);
515 static inline int eeprom_ext_hw_conf_offset(struct scsi_qla_host *ha)
517 return (is_qla4010(ha) ?
518 offsetof(struct eeprom_data, isp4010.ext_hw_conf) / 2 :
519 offsetof(struct eeprom_data, isp4022.ext_hw_conf) / 2);
522 int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
523 void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask);
524 int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
526 static inline int ql4xxx_lock_flash(struct scsi_qla_host *a)
529 return ql4xxx_sem_spinlock(a, QL4010_FLASH_SEM_MASK,
530 QL4010_FLASH_SEM_BITS);
532 return ql4xxx_sem_spinlock(a, QL4022_FLASH_SEM_MASK,
533 (QL4022_RESOURCE_BITS_BASE_CODE |
534 (a->mac_index)) << 13);
537 static inline void ql4xxx_unlock_flash(struct scsi_qla_host *a)
540 ql4xxx_sem_unlock(a, QL4010_FLASH_SEM_MASK);
542 ql4xxx_sem_unlock(a, QL4022_FLASH_SEM_MASK);
545 static inline int ql4xxx_lock_nvram(struct scsi_qla_host *a)
548 return ql4xxx_sem_spinlock(a, QL4010_NVRAM_SEM_MASK,
549 QL4010_NVRAM_SEM_BITS);
551 return ql4xxx_sem_spinlock(a, QL4022_NVRAM_SEM_MASK,
552 (QL4022_RESOURCE_BITS_BASE_CODE |
553 (a->mac_index)) << 10);
556 static inline void ql4xxx_unlock_nvram(struct scsi_qla_host *a)
559 ql4xxx_sem_unlock(a, QL4010_NVRAM_SEM_MASK);
561 ql4xxx_sem_unlock(a, QL4022_NVRAM_SEM_MASK);
564 static inline int ql4xxx_lock_drvr(struct scsi_qla_host *a)
567 return ql4xxx_sem_lock(a, QL4010_DRVR_SEM_MASK,
568 QL4010_DRVR_SEM_BITS);
570 return ql4xxx_sem_lock(a, QL4022_DRVR_SEM_MASK,
571 (QL4022_RESOURCE_BITS_BASE_CODE |
572 (a->mac_index)) << 1);
575 static inline void ql4xxx_unlock_drvr(struct scsi_qla_host *a)
578 ql4xxx_sem_unlock(a, QL4010_DRVR_SEM_MASK);
580 ql4xxx_sem_unlock(a, QL4022_DRVR_SEM_MASK);
583 /*---------------------------------------------------------------------------*/
585 /* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */
586 #define PRESERVE_DDB_LIST 0
587 #define REBUILD_DDB_LIST 1
589 /* Defines for process_aen() */
590 #define PROCESS_ALL_AENS 0
591 #define FLUSH_DDB_CHANGED_AENS 1
592 #define RELOGIN_DDB_CHANGED_AENS 2
594 #endif /*_QLA4XXX_H */