2 * I2O kernel space accessible structures/APIs
4 * (c) Copyright 1999, 2000 Red Hat Software
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 *************************************************************************
13 * This header file defined the I2O APIs/structures for use by
14 * the I2O kernel modules.
21 #ifdef __KERNEL__ /* This file to be included by kernel only */
23 #include <linux/i2o-dev.h>
25 /* How many different OSM's are we allowing */
26 #define I2O_MAX_DRIVERS 8
28 #include <linux/pci.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/string.h>
31 #include <linux/slab.h>
32 #include <linux/workqueue.h> /* work_struct */
33 #include <linux/mempool.h>
34 #include <linux/mutex.h>
35 #include <linux/scatterlist.h>
38 #include <asm/semaphore.h> /* Needed for MUTEX init macros */
40 /* message queue empty */
41 #define I2O_QUEUE_EMPTY 0xffffffff
47 /* The NULL strategy leaves everything up to the controller. This tends to be a
48 * pessimal but functional choice.
51 /* Prefetch data when reading. We continually attempt to load the next 32 sectors
52 * into the controller cache.
54 #define CACHE_PREFETCH 1
55 /* Prefetch data when reading. We sometimes attempt to load the next 32 sectors
56 * into the controller cache. When an I/O is less <= 8K we assume its probably
57 * not sequential and don't prefetch (default)
59 #define CACHE_SMARTFETCH 2
60 /* Data is written to the cache and then out on to the disk. The I/O must be
61 * physically on the medium before the write is acknowledged (default without
64 #define CACHE_WRITETHROUGH 17
65 /* Data is written to the cache and then out on to the disk. The controller
66 * is permitted to write back the cache any way it wants. (default if battery
67 * backed NVRAM is present). It can be useful to set this for swap regardless of
70 #define CACHE_WRITEBACK 18
71 /* Optimise for under powered controllers, especially on RAID1 and RAID0. We
72 * write large I/O's directly to disk bypassing the cache to avoid the extra
73 * memory copy hits. Small writes are writeback cached
75 #define CACHE_SMARTBACK 19
76 /* Optimise for under powered controllers, especially on RAID1 and RAID0. We
77 * write large I/O's directly to disk bypassing the cache to avoid the extra
78 * memory copy hits. Small writes are writethrough cached. Suitable for devices
79 * lacking battery backup
81 #define CACHE_SMARTTHROUGH 20
87 #define BLKI2OGRSTRAT _IOR('2', 1, int)
88 #define BLKI2OGWSTRAT _IOR('2', 2, int)
89 #define BLKI2OSRSTRAT _IOW('2', 3, int)
90 #define BLKI2OSWSTRAT _IOW('2', 4, int)
99 #define I2O_CMD_ADAPTER_ASSIGN 0xB3
100 #define I2O_CMD_ADAPTER_READ 0xB2
101 #define I2O_CMD_ADAPTER_RELEASE 0xB5
102 #define I2O_CMD_BIOS_INFO_SET 0xA5
103 #define I2O_CMD_BOOT_DEVICE_SET 0xA7
104 #define I2O_CMD_CONFIG_VALIDATE 0xBB
105 #define I2O_CMD_CONN_SETUP 0xCA
106 #define I2O_CMD_DDM_DESTROY 0xB1
107 #define I2O_CMD_DDM_ENABLE 0xD5
108 #define I2O_CMD_DDM_QUIESCE 0xC7
109 #define I2O_CMD_DDM_RESET 0xD9
110 #define I2O_CMD_DDM_SUSPEND 0xAF
111 #define I2O_CMD_DEVICE_ASSIGN 0xB7
112 #define I2O_CMD_DEVICE_RELEASE 0xB9
113 #define I2O_CMD_HRT_GET 0xA8
114 #define I2O_CMD_ADAPTER_CLEAR 0xBE
115 #define I2O_CMD_ADAPTER_CONNECT 0xC9
116 #define I2O_CMD_ADAPTER_RESET 0xBD
117 #define I2O_CMD_LCT_NOTIFY 0xA2
118 #define I2O_CMD_OUTBOUND_INIT 0xA1
119 #define I2O_CMD_PATH_ENABLE 0xD3
120 #define I2O_CMD_PATH_QUIESCE 0xC5
121 #define I2O_CMD_PATH_RESET 0xD7
122 #define I2O_CMD_STATIC_MF_CREATE 0xDD
123 #define I2O_CMD_STATIC_MF_RELEASE 0xDF
124 #define I2O_CMD_STATUS_GET 0xA0
125 #define I2O_CMD_SW_DOWNLOAD 0xA9
126 #define I2O_CMD_SW_UPLOAD 0xAB
127 #define I2O_CMD_SW_REMOVE 0xAD
128 #define I2O_CMD_SYS_ENABLE 0xD1
129 #define I2O_CMD_SYS_MODIFY 0xC1
130 #define I2O_CMD_SYS_QUIESCE 0xC3
131 #define I2O_CMD_SYS_TAB_SET 0xA3
136 #define I2O_CMD_UTIL_NOP 0x00
137 #define I2O_CMD_UTIL_ABORT 0x01
138 #define I2O_CMD_UTIL_CLAIM 0x09
139 #define I2O_CMD_UTIL_RELEASE 0x0B
140 #define I2O_CMD_UTIL_PARAMS_GET 0x06
141 #define I2O_CMD_UTIL_PARAMS_SET 0x05
142 #define I2O_CMD_UTIL_EVT_REGISTER 0x13
143 #define I2O_CMD_UTIL_EVT_ACK 0x14
144 #define I2O_CMD_UTIL_CONFIG_DIALOG 0x10
145 #define I2O_CMD_UTIL_DEVICE_RESERVE 0x0D
146 #define I2O_CMD_UTIL_DEVICE_RELEASE 0x0F
147 #define I2O_CMD_UTIL_LOCK 0x17
148 #define I2O_CMD_UTIL_LOCK_RELEASE 0x19
149 #define I2O_CMD_UTIL_REPLY_FAULT_NOTIFY 0x15
152 * SCSI Host Bus Adapter Class
154 #define I2O_CMD_SCSI_EXEC 0x81
155 #define I2O_CMD_SCSI_ABORT 0x83
156 #define I2O_CMD_SCSI_BUSRESET 0x27
161 #define I2O_CMD_BUS_ADAPTER_RESET 0x85
162 #define I2O_CMD_BUS_RESET 0x87
163 #define I2O_CMD_BUS_SCAN 0x89
164 #define I2O_CMD_BUS_QUIESCE 0x8b
167 * Random Block Storage Class
169 #define I2O_CMD_BLOCK_READ 0x30
170 #define I2O_CMD_BLOCK_WRITE 0x31
171 #define I2O_CMD_BLOCK_CFLUSH 0x37
172 #define I2O_CMD_BLOCK_MLOCK 0x49
173 #define I2O_CMD_BLOCK_MUNLOCK 0x4B
174 #define I2O_CMD_BLOCK_MMOUNT 0x41
175 #define I2O_CMD_BLOCK_MEJECT 0x43
176 #define I2O_CMD_BLOCK_POWER 0x70
178 #define I2O_CMD_PRIVATE 0xFF
180 /* Command status values */
182 #define I2O_CMD_IN_PROGRESS 0x01
183 #define I2O_CMD_REJECTED 0x02
184 #define I2O_CMD_FAILED 0x03
185 #define I2O_CMD_COMPLETED 0x04
187 /* I2O API function return values */
189 #define I2O_RTN_NO_ERROR 0
190 #define I2O_RTN_NOT_INIT 1
191 #define I2O_RTN_FREE_Q_EMPTY 2
192 #define I2O_RTN_TCB_ERROR 3
193 #define I2O_RTN_TRANSACTION_ERROR 4
194 #define I2O_RTN_ADAPTER_ALREADY_INIT 5
195 #define I2O_RTN_MALLOC_ERROR 6
196 #define I2O_RTN_ADPTR_NOT_REGISTERED 7
197 #define I2O_RTN_MSG_REPLY_TIMEOUT 8
198 #define I2O_RTN_NO_STATUS 9
199 #define I2O_RTN_NO_FIRM_VER 10
200 #define I2O_RTN_NO_LINK_SPEED 11
202 /* Reply message status defines for all messages */
204 #define I2O_REPLY_STATUS_SUCCESS 0x00
205 #define I2O_REPLY_STATUS_ABORT_DIRTY 0x01
206 #define I2O_REPLY_STATUS_ABORT_NO_DATA_TRANSFER 0x02
207 #define I2O_REPLY_STATUS_ABORT_PARTIAL_TRANSFER 0x03
208 #define I2O_REPLY_STATUS_ERROR_DIRTY 0x04
209 #define I2O_REPLY_STATUS_ERROR_NO_DATA_TRANSFER 0x05
210 #define I2O_REPLY_STATUS_ERROR_PARTIAL_TRANSFER 0x06
211 #define I2O_REPLY_STATUS_PROCESS_ABORT_DIRTY 0x08
212 #define I2O_REPLY_STATUS_PROCESS_ABORT_NO_DATA_TRANSFER 0x09
213 #define I2O_REPLY_STATUS_PROCESS_ABORT_PARTIAL_TRANSFER 0x0A
214 #define I2O_REPLY_STATUS_TRANSACTION_ERROR 0x0B
215 #define I2O_REPLY_STATUS_PROGRESS_REPORT 0x80
217 /* Status codes and Error Information for Parameter functions */
219 #define I2O_PARAMS_STATUS_SUCCESS 0x00
220 #define I2O_PARAMS_STATUS_BAD_KEY_ABORT 0x01
221 #define I2O_PARAMS_STATUS_BAD_KEY_CONTINUE 0x02
222 #define I2O_PARAMS_STATUS_BUFFER_FULL 0x03
223 #define I2O_PARAMS_STATUS_BUFFER_TOO_SMALL 0x04
224 #define I2O_PARAMS_STATUS_FIELD_UNREADABLE 0x05
225 #define I2O_PARAMS_STATUS_FIELD_UNWRITEABLE 0x06
226 #define I2O_PARAMS_STATUS_INSUFFICIENT_FIELDS 0x07
227 #define I2O_PARAMS_STATUS_INVALID_GROUP_ID 0x08
228 #define I2O_PARAMS_STATUS_INVALID_OPERATION 0x09
229 #define I2O_PARAMS_STATUS_NO_KEY_FIELD 0x0A
230 #define I2O_PARAMS_STATUS_NO_SUCH_FIELD 0x0B
231 #define I2O_PARAMS_STATUS_NON_DYNAMIC_GROUP 0x0C
232 #define I2O_PARAMS_STATUS_OPERATION_ERROR 0x0D
233 #define I2O_PARAMS_STATUS_SCALAR_ERROR 0x0E
234 #define I2O_PARAMS_STATUS_TABLE_ERROR 0x0F
235 #define I2O_PARAMS_STATUS_WRONG_GROUP_TYPE 0x10
237 /* DetailedStatusCode defines for Executive, DDM, Util and Transaction error
238 * messages: Table 3-2 Detailed Status Codes.*/
240 #define I2O_DSC_SUCCESS 0x0000
241 #define I2O_DSC_BAD_KEY 0x0002
242 #define I2O_DSC_TCL_ERROR 0x0003
243 #define I2O_DSC_REPLY_BUFFER_FULL 0x0004
244 #define I2O_DSC_NO_SUCH_PAGE 0x0005
245 #define I2O_DSC_INSUFFICIENT_RESOURCE_SOFT 0x0006
246 #define I2O_DSC_INSUFFICIENT_RESOURCE_HARD 0x0007
247 #define I2O_DSC_CHAIN_BUFFER_TOO_LARGE 0x0009
248 #define I2O_DSC_UNSUPPORTED_FUNCTION 0x000A
249 #define I2O_DSC_DEVICE_LOCKED 0x000B
250 #define I2O_DSC_DEVICE_RESET 0x000C
251 #define I2O_DSC_INAPPROPRIATE_FUNCTION 0x000D
252 #define I2O_DSC_INVALID_INITIATOR_ADDRESS 0x000E
253 #define I2O_DSC_INVALID_MESSAGE_FLAGS 0x000F
254 #define I2O_DSC_INVALID_OFFSET 0x0010
255 #define I2O_DSC_INVALID_PARAMETER 0x0011
256 #define I2O_DSC_INVALID_REQUEST 0x0012
257 #define I2O_DSC_INVALID_TARGET_ADDRESS 0x0013
258 #define I2O_DSC_MESSAGE_TOO_LARGE 0x0014
259 #define I2O_DSC_MESSAGE_TOO_SMALL 0x0015
260 #define I2O_DSC_MISSING_PARAMETER 0x0016
261 #define I2O_DSC_TIMEOUT 0x0017
262 #define I2O_DSC_UNKNOWN_ERROR 0x0018
263 #define I2O_DSC_UNKNOWN_FUNCTION 0x0019
264 #define I2O_DSC_UNSUPPORTED_VERSION 0x001A
265 #define I2O_DSC_DEVICE_BUSY 0x001B
266 #define I2O_DSC_DEVICE_NOT_AVAILABLE 0x001C
268 /* DetailedStatusCode defines for Block Storage Operation: Table 6-7 Detailed
271 #define I2O_BSA_DSC_SUCCESS 0x0000
272 #define I2O_BSA_DSC_MEDIA_ERROR 0x0001
273 #define I2O_BSA_DSC_ACCESS_ERROR 0x0002
274 #define I2O_BSA_DSC_DEVICE_FAILURE 0x0003
275 #define I2O_BSA_DSC_DEVICE_NOT_READY 0x0004
276 #define I2O_BSA_DSC_MEDIA_NOT_PRESENT 0x0005
277 #define I2O_BSA_DSC_MEDIA_LOCKED 0x0006
278 #define I2O_BSA_DSC_MEDIA_FAILURE 0x0007
279 #define I2O_BSA_DSC_PROTOCOL_FAILURE 0x0008
280 #define I2O_BSA_DSC_BUS_FAILURE 0x0009
281 #define I2O_BSA_DSC_ACCESS_VIOLATION 0x000A
282 #define I2O_BSA_DSC_WRITE_PROTECTED 0x000B
283 #define I2O_BSA_DSC_DEVICE_RESET 0x000C
284 #define I2O_BSA_DSC_VOLUME_CHANGED 0x000D
285 #define I2O_BSA_DSC_TIMEOUT 0x000E
287 /* FailureStatusCodes, Table 3-3 Message Failure Codes */
289 #define I2O_FSC_TRANSPORT_SERVICE_SUSPENDED 0x81
290 #define I2O_FSC_TRANSPORT_SERVICE_TERMINATED 0x82
291 #define I2O_FSC_TRANSPORT_CONGESTION 0x83
292 #define I2O_FSC_TRANSPORT_FAILURE 0x84
293 #define I2O_FSC_TRANSPORT_STATE_ERROR 0x85
294 #define I2O_FSC_TRANSPORT_TIME_OUT 0x86
295 #define I2O_FSC_TRANSPORT_ROUTING_FAILURE 0x87
296 #define I2O_FSC_TRANSPORT_INVALID_VERSION 0x88
297 #define I2O_FSC_TRANSPORT_INVALID_OFFSET 0x89
298 #define I2O_FSC_TRANSPORT_INVALID_MSG_FLAGS 0x8A
299 #define I2O_FSC_TRANSPORT_FRAME_TOO_SMALL 0x8B
300 #define I2O_FSC_TRANSPORT_FRAME_TOO_LARGE 0x8C
301 #define I2O_FSC_TRANSPORT_INVALID_TARGET_ID 0x8D
302 #define I2O_FSC_TRANSPORT_INVALID_INITIATOR_ID 0x8E
303 #define I2O_FSC_TRANSPORT_INVALID_INITIATOR_CONTEXT 0x8F
304 #define I2O_FSC_TRANSPORT_UNKNOWN_FAILURE 0xFF
306 /* Device Claim Types */
307 #define I2O_CLAIM_PRIMARY 0x01000000
308 #define I2O_CLAIM_MANAGEMENT 0x02000000
309 #define I2O_CLAIM_AUTHORIZED 0x03000000
310 #define I2O_CLAIM_SECONDARY 0x04000000
312 /* Message header defines for VersionOffset */
313 #define I2OVER15 0x0001
314 #define I2OVER20 0x0002
317 #define I2OVERSION I2OVER15
319 #define SGL_OFFSET_0 I2OVERSION
320 #define SGL_OFFSET_4 (0x0040 | I2OVERSION)
321 #define SGL_OFFSET_5 (0x0050 | I2OVERSION)
322 #define SGL_OFFSET_6 (0x0060 | I2OVERSION)
323 #define SGL_OFFSET_7 (0x0070 | I2OVERSION)
324 #define SGL_OFFSET_8 (0x0080 | I2OVERSION)
325 #define SGL_OFFSET_9 (0x0090 | I2OVERSION)
326 #define SGL_OFFSET_10 (0x00A0 | I2OVERSION)
327 #define SGL_OFFSET_11 (0x00B0 | I2OVERSION)
328 #define SGL_OFFSET_12 (0x00C0 | I2OVERSION)
329 #define SGL_OFFSET(x) (((x)<<4) | I2OVERSION)
331 /* Transaction Reply Lists (TRL) Control Word structure */
332 #define TRL_SINGLE_FIXED_LENGTH 0x00
333 #define TRL_SINGLE_VARIABLE_LENGTH 0x40
334 #define TRL_MULTIPLE_FIXED_LENGTH 0x80
336 /* msg header defines for MsgFlags */
337 #define MSG_STATIC 0x0100
338 #define MSG_64BIT_CNTXT 0x0200
339 #define MSG_MULTI_TRANS 0x1000
340 #define MSG_FAIL 0x2000
341 #define MSG_FINAL 0x4000
342 #define MSG_REPLY 0x8000
344 /* minimum size msg */
345 #define THREE_WORD_MSG_SIZE 0x00030000
346 #define FOUR_WORD_MSG_SIZE 0x00040000
347 #define FIVE_WORD_MSG_SIZE 0x00050000
348 #define SIX_WORD_MSG_SIZE 0x00060000
349 #define SEVEN_WORD_MSG_SIZE 0x00070000
350 #define EIGHT_WORD_MSG_SIZE 0x00080000
351 #define NINE_WORD_MSG_SIZE 0x00090000
352 #define TEN_WORD_MSG_SIZE 0x000A0000
353 #define ELEVEN_WORD_MSG_SIZE 0x000B0000
354 #define I2O_MESSAGE_SIZE(x) ((x)<<16)
356 /* special TID assignments */
357 #define ADAPTER_TID 0
360 /* outbound queue defines */
361 #define I2O_MAX_OUTBOUND_MSG_FRAMES 128
362 #define I2O_OUTBOUND_MSG_FRAME_SIZE 128 /* in 32-bit words */
364 /* inbound queue definitions */
365 #define I2O_MSG_INPOOL_MIN 32
366 #define I2O_INBOUND_MSG_FRAME_SIZE 128 /* in 32-bit words */
368 #define I2O_POST_WAIT_OK 0
369 #define I2O_POST_WAIT_TIMEOUT -ETIMEDOUT
371 #define I2O_CONTEXT_LIST_MIN_LENGTH 15
372 #define I2O_CONTEXT_LIST_USED 0x01
373 #define I2O_CONTEXT_LIST_DELETED 0x02
376 #define I2O_TIMEOUT_INIT_OUTBOUND_QUEUE 15
377 #define I2O_TIMEOUT_MESSAGE_GET 5
378 #define I2O_TIMEOUT_RESET 30
379 #define I2O_TIMEOUT_STATUS_GET 5
380 #define I2O_TIMEOUT_LCT_GET 360
381 #define I2O_TIMEOUT_SCSI_SCB_ABORT 240
384 #define I2O_HRT_GET_TRIES 3
385 #define I2O_LCT_GET_TRIES 3
387 /* defines for max_sectors and max_phys_segments */
388 #define I2O_MAX_SECTORS 1024
389 #define I2O_MAX_SECTORS_LIMITED 128
390 #define I2O_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
404 u32 icntxt; /* initiator context */
405 u32 tcntxt; /* transaction context */
413 /* MFA and I2O message used by mempool */
415 u32 mfa; /* MFA returned by the controller */
416 struct i2o_message msg; /* I2O message */
420 * Each I2O device entity has one of these. There is one per device.
423 i2o_lct_entry lct_data; /* Device LCT information */
425 struct i2o_controller *iop; /* Controlling IOP */
426 struct list_head list; /* node in IOP devices list */
428 struct device device;
430 struct mutex lock; /* device lock */
434 * Event structure provided to the event handling function
437 struct work_struct work;
438 struct i2o_device *i2o_dev; /* I2O device pointer from which the
439 event reply was initiated */
440 u16 size; /* Size of data in 32-bit words */
441 u32 tcntxt; /* Transaction context used at
443 u32 event_indicator; /* Event indicator from reply */
444 u32 data[0]; /* Event data from reply */
448 * I2O classes which could be handled by the OSM
450 struct i2o_class_id {
455 * I2O driver structure for OSMs
458 char *name; /* OSM name */
459 int context; /* Low 8 bits of the transaction info */
460 struct i2o_class_id *classes; /* I2O classes that this OSM handles */
462 /* Message reply handler */
463 int (*reply) (struct i2o_controller *, u32, struct i2o_message *);
468 struct workqueue_struct *event_queue; /* Event queue */
470 struct device_driver driver;
472 /* notification of changes */
473 void (*notify_controller_add) (struct i2o_controller *);
474 void (*notify_controller_remove) (struct i2o_controller *);
475 void (*notify_device_add) (struct i2o_device *);
476 void (*notify_device_remove) (struct i2o_device *);
478 struct semaphore lock;
482 * Contains DMA mapped address information
491 * Contains slab cache and mempool information
495 struct kmem_cache *slab;
500 * Contains IO mapped address information
509 * Context queue entry, used for 32-bit context on 64-bit systems
511 struct i2o_context_list_element {
512 struct list_head list;
515 unsigned long timestamp;
519 * Each I2O controller has one of these objects
521 struct i2o_controller {
526 struct pci_dev *pdev; /* PCI device */
528 unsigned int promise:1; /* Promise controller */
529 unsigned int adaptec:1; /* DPT / Adaptec controller */
530 unsigned int raptor:1; /* split bar */
531 unsigned int no_quiesce:1; /* dont quiesce before reset */
532 unsigned int short_req:1; /* use small block sizes */
533 unsigned int limit_sectors:1; /* limit number of sectors / request */
534 unsigned int pae_support:1; /* controller has 64-bit SGL support */
536 struct list_head devices; /* list of I2O devices */
537 struct list_head list; /* Controller list */
539 void __iomem *in_port; /* Inbout port address */
540 void __iomem *out_port; /* Outbound port address */
541 void __iomem *irq_status; /* Interrupt status register address */
542 void __iomem *irq_mask; /* Interrupt mask register address */
544 struct i2o_dma status; /* IOP status block */
546 struct i2o_dma hrt; /* HW Resource Table */
547 i2o_lct *lct; /* Logical Config Table */
548 struct i2o_dma dlct; /* Temp LCT */
549 struct mutex lct_lock; /* Lock for LCT updates */
550 struct i2o_dma status_block; /* IOP status block */
552 struct i2o_io base; /* controller messaging unit */
553 struct i2o_io in_queue; /* inbound message queue Host->IOP */
554 struct i2o_dma out_queue; /* outbound message queue IOP->Host */
556 struct i2o_pool in_msg; /* mempool for inbound messages */
558 unsigned int battery:1; /* Has a battery backup */
559 unsigned int io_alloc:1; /* An I/O resource was allocated */
560 unsigned int mem_alloc:1; /* A memory resource was allocated */
562 struct resource io_resource; /* I/O resource allocated to the IOP */
563 struct resource mem_resource; /* Mem resource allocated to the IOP */
565 struct device device;
566 struct i2o_device *exec; /* Executive */
567 #if BITS_PER_LONG == 64
568 spinlock_t context_list_lock; /* lock for context_list */
569 atomic_t context_list_counter; /* needed for unique contexts */
570 struct list_head context_list; /* list of context id's
573 spinlock_t lock; /* lock for controller
576 void *driver_data[I2O_MAX_DRIVERS]; /* storage for drivers */
580 * I2O System table entry
582 * The system table contains information about all the IOPs in the
583 * system. It is sent to all IOPs so that they can create peer2peer
584 * connections between them.
586 struct i2o_sys_tbl_entry {
598 u32 iop_capabilities;
610 struct i2o_sys_tbl_entry iops[0];
613 extern struct list_head i2o_controllers;
615 /* Message functions */
616 static inline struct i2o_message *i2o_msg_get(struct i2o_controller *);
617 extern struct i2o_message *i2o_msg_get_wait(struct i2o_controller *, int);
618 static inline void i2o_msg_post(struct i2o_controller *, struct i2o_message *);
619 static inline int i2o_msg_post_wait(struct i2o_controller *,
620 struct i2o_message *, unsigned long);
621 extern int i2o_msg_post_wait_mem(struct i2o_controller *, struct i2o_message *,
622 unsigned long, struct i2o_dma *);
623 static inline void i2o_flush_reply(struct i2o_controller *, u32);
626 extern int i2o_status_get(struct i2o_controller *);
628 extern int i2o_event_register(struct i2o_device *, struct i2o_driver *, int,
630 extern struct i2o_device *i2o_iop_find_device(struct i2o_controller *, u16);
631 extern struct i2o_controller *i2o_find_iop(int);
633 /* Functions needed for handling 64-bit pointers in 32-bit context */
634 #if BITS_PER_LONG == 64
635 extern u32 i2o_cntxt_list_add(struct i2o_controller *, void *);
636 extern void *i2o_cntxt_list_get(struct i2o_controller *, u32);
637 extern u32 i2o_cntxt_list_remove(struct i2o_controller *, void *);
638 extern u32 i2o_cntxt_list_get_ptr(struct i2o_controller *, void *);
640 static inline u32 i2o_ptr_low(void *ptr)
642 return (u32) (u64) ptr;
645 static inline u32 i2o_ptr_high(void *ptr)
647 return (u32) ((u64) ptr >> 32);
650 static inline u32 i2o_dma_low(dma_addr_t dma_addr)
652 return (u32) (u64) dma_addr;
655 static inline u32 i2o_dma_high(dma_addr_t dma_addr)
657 return (u32) ((u64) dma_addr >> 32);
660 static inline u32 i2o_cntxt_list_add(struct i2o_controller *c, void *ptr)
665 static inline void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context)
667 return (void *)context;
670 static inline u32 i2o_cntxt_list_remove(struct i2o_controller *c, void *ptr)
675 static inline u32 i2o_cntxt_list_get_ptr(struct i2o_controller *c, void *ptr)
680 static inline u32 i2o_ptr_low(void *ptr)
685 static inline u32 i2o_ptr_high(void *ptr)
690 static inline u32 i2o_dma_low(dma_addr_t dma_addr)
692 return (u32) dma_addr;
695 static inline u32 i2o_dma_high(dma_addr_t dma_addr)
702 * i2o_sg_tablesize - Calculate the maximum number of elements in a SGL
703 * @c: I2O controller for which the calculation should be done
704 * @body_size: maximum body size used for message in 32-bit words.
706 * Return the maximum number of SG elements in a SG list.
708 static inline u16 i2o_sg_tablesize(struct i2o_controller *c, u16 body_size)
710 i2o_status_block *sb = c->status_block.virt;
712 (sb->inbound_frame_size - sizeof(struct i2o_message) / 4) -
715 if (c->pae_support) {
717 * for 64-bit a SG attribute element must be added and each
718 * SG element needs 12 bytes instead of 8.
725 if (c->short_req && (sg_count > 8))
732 * i2o_dma_map_single - Map pointer to controller and fill in I2O message.
734 * @ptr: pointer to the data which should be mapped
735 * @size: size of data in bytes
736 * @direction: DMA_TO_DEVICE / DMA_FROM_DEVICE
737 * @sg_ptr: pointer to the SG list inside the I2O message
739 * This function does all necessary DMA handling and also writes the I2O
740 * SGL elements into the I2O message. For details on DMA handling see also
741 * dma_map_single(). The pointer sg_ptr will only be set to the end of the
742 * SG list if the allocation was successful.
744 * Returns DMA address which must be checked for failures using
745 * dma_mapping_error().
747 static inline dma_addr_t i2o_dma_map_single(struct i2o_controller *c, void *ptr,
749 enum dma_data_direction direction,
758 sg_flags = 0xd4000000;
760 case DMA_FROM_DEVICE:
761 sg_flags = 0xd0000000;
767 dma_addr = dma_map_single(&c->pdev->dev, ptr, size, direction);
768 if (!dma_mapping_error(dma_addr)) {
769 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
770 if ((sizeof(dma_addr_t) > 4) && c->pae_support) {
771 *mptr++ = cpu_to_le32(0x7C020002);
772 *mptr++ = cpu_to_le32(PAGE_SIZE);
776 *mptr++ = cpu_to_le32(sg_flags | size);
777 *mptr++ = cpu_to_le32(i2o_dma_low(dma_addr));
778 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
779 if ((sizeof(dma_addr_t) > 4) && c->pae_support)
780 *mptr++ = cpu_to_le32(i2o_dma_high(dma_addr));
788 * i2o_dma_map_sg - Map a SG List to controller and fill in I2O message.
790 * @sg: SG list to be mapped
791 * @sg_count: number of elements in the SG list
792 * @direction: DMA_TO_DEVICE / DMA_FROM_DEVICE
793 * @sg_ptr: pointer to the SG list inside the I2O message
795 * This function does all necessary DMA handling and also writes the I2O
796 * SGL elements into the I2O message. For details on DMA handling see also
797 * dma_map_sg(). The pointer sg_ptr will only be set to the end of the SG
798 * list if the allocation was successful.
800 * Returns 0 on failure or 1 on success.
802 static inline int i2o_dma_map_sg(struct i2o_controller *c,
803 struct scatterlist *sg, int sg_count,
804 enum dma_data_direction direction,
812 sg_flags = 0x14000000;
814 case DMA_FROM_DEVICE:
815 sg_flags = 0x10000000;
821 sg_count = dma_map_sg(&c->pdev->dev, sg, sg_count, direction);
825 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
826 if ((sizeof(dma_addr_t) > 4) && c->pae_support) {
827 *mptr++ = cpu_to_le32(0x7C020002);
828 *mptr++ = cpu_to_le32(PAGE_SIZE);
832 while (sg_count-- > 0) {
834 sg_flags |= 0xC0000000;
835 *mptr++ = cpu_to_le32(sg_flags | sg_dma_len(sg));
836 *mptr++ = cpu_to_le32(i2o_dma_low(sg_dma_address(sg)));
837 #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
838 if ((sizeof(dma_addr_t) > 4) && c->pae_support)
839 *mptr++ = cpu_to_le32(i2o_dma_high(sg_dma_address(sg)));
849 * i2o_dma_alloc - Allocate DMA memory
850 * @dev: struct device pointer to the PCI device of the I2O controller
851 * @addr: i2o_dma struct which should get the DMA buffer
852 * @len: length of the new DMA memory
853 * @gfp_mask: GFP mask
855 * Allocate a coherent DMA memory and write the pointers into addr.
857 * Returns 0 on success or -ENOMEM on failure.
859 static inline int i2o_dma_alloc(struct device *dev, struct i2o_dma *addr,
860 size_t len, gfp_t gfp_mask)
862 struct pci_dev *pdev = to_pci_dev(dev);
865 if ((sizeof(dma_addr_t) > 4) && (pdev->dma_mask == DMA_64BIT_MASK)) {
867 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK))
871 addr->virt = dma_alloc_coherent(dev, len, &addr->phys, gfp_mask);
873 if ((sizeof(dma_addr_t) > 4) && dma_64)
874 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK))
875 printk(KERN_WARNING "i2o: unable to set 64-bit DMA");
880 memset(addr->virt, 0, len);
887 * i2o_dma_free - Free DMA memory
888 * @dev: struct device pointer to the PCI device of the I2O controller
889 * @addr: i2o_dma struct which contains the DMA buffer
891 * Free a coherent DMA memory and set virtual address of addr to NULL.
893 static inline void i2o_dma_free(struct device *dev, struct i2o_dma *addr)
897 dma_free_coherent(dev, addr->len, addr->virt,
906 * i2o_dma_realloc - Realloc DMA memory
907 * @dev: struct device pointer to the PCI device of the I2O controller
908 * @addr: pointer to a i2o_dma struct DMA buffer
909 * @len: new length of memory
910 * @gfp_mask: GFP mask
912 * If there was something allocated in the addr, free it first. If len > 0
913 * than try to allocate it and write the addresses back to the addr
914 * structure. If len == 0 set the virtual address to NULL.
916 * Returns the 0 on success or negative error code on failure.
918 static inline int i2o_dma_realloc(struct device *dev, struct i2o_dma *addr,
919 size_t len, gfp_t gfp_mask)
921 i2o_dma_free(dev, addr);
924 return i2o_dma_alloc(dev, addr, len, gfp_mask);
930 * i2o_pool_alloc - Allocate an slab cache and mempool
931 * @mempool: pointer to struct i2o_pool to write data into.
932 * @name: name which is used to identify cache
933 * @size: size of each object
934 * @min_nr: minimum number of objects
936 * First allocates a slab cache with name and size. Then allocates a
937 * mempool which uses the slab cache for allocation and freeing.
939 * Returns 0 on success or negative error code on failure.
941 static inline int i2o_pool_alloc(struct i2o_pool *pool, const char *name,
942 size_t size, int min_nr)
944 pool->name = kmalloc(strlen(name) + 1, GFP_KERNEL);
947 strcpy(pool->name, name);
950 kmem_cache_create(pool->name, size, 0, SLAB_HWCACHE_ALIGN, NULL);
954 pool->mempool = mempool_create_slab_pool(min_nr, pool->slab);
961 kmem_cache_destroy(pool->slab);
971 * i2o_pool_free - Free slab cache and mempool again
972 * @mempool: pointer to struct i2o_pool which should be freed
974 * Note that you have to return all objects to the mempool again before
975 * calling i2o_pool_free().
977 static inline void i2o_pool_free(struct i2o_pool *pool)
979 mempool_destroy(pool->mempool);
980 kmem_cache_destroy(pool->slab);
984 /* I2O driver (OSM) functions */
985 extern int i2o_driver_register(struct i2o_driver *);
986 extern void i2o_driver_unregister(struct i2o_driver *);
989 * i2o_driver_notify_controller_add - Send notification of added controller
993 * Send notification of added controller to a single registered driver.
995 static inline void i2o_driver_notify_controller_add(struct i2o_driver *drv,
996 struct i2o_controller *c)
998 if (drv->notify_controller_add)
999 drv->notify_controller_add(c);
1003 * i2o_driver_notify_controller_remove - Send notification of removed controller
1005 * @c: I2O controller
1007 * Send notification of removed controller to a single registered driver.
1009 static inline void i2o_driver_notify_controller_remove(struct i2o_driver *drv,
1010 struct i2o_controller *c)
1012 if (drv->notify_controller_remove)
1013 drv->notify_controller_remove(c);
1017 * i2o_driver_notify_device_add - Send notification of added device
1019 * @i2o_dev: the added i2o_device
1021 * Send notification of added device to a single registered driver.
1023 static inline void i2o_driver_notify_device_add(struct i2o_driver *drv,
1024 struct i2o_device *i2o_dev)
1026 if (drv->notify_device_add)
1027 drv->notify_device_add(i2o_dev);
1031 * i2o_driver_notify_device_remove - Send notification of removed device
1033 * @i2o_dev: the added i2o_device
1035 * Send notification of removed device to a single registered driver.
1037 static inline void i2o_driver_notify_device_remove(struct i2o_driver *drv,
1038 struct i2o_device *i2o_dev)
1040 if (drv->notify_device_remove)
1041 drv->notify_device_remove(i2o_dev);
1044 extern void i2o_driver_notify_controller_add_all(struct i2o_controller *);
1045 extern void i2o_driver_notify_controller_remove_all(struct i2o_controller *);
1046 extern void i2o_driver_notify_device_add_all(struct i2o_device *);
1047 extern void i2o_driver_notify_device_remove_all(struct i2o_device *);
1049 /* I2O device functions */
1050 extern int i2o_device_claim(struct i2o_device *);
1051 extern int i2o_device_claim_release(struct i2o_device *);
1053 /* Exec OSM functions */
1054 extern int i2o_exec_lct_get(struct i2o_controller *);
1056 /* device / driver / kobject conversion functions */
1057 #define to_i2o_driver(drv) container_of(drv,struct i2o_driver, driver)
1058 #define to_i2o_device(dev) container_of(dev, struct i2o_device, device)
1059 #define to_i2o_controller(dev) container_of(dev, struct i2o_controller, device)
1060 #define kobj_to_i2o_device(kobj) to_i2o_device(container_of(kobj, struct device, kobj))
1063 * i2o_out_to_virt - Turn an I2O message to a virtual address
1065 * @m: message engine value
1067 * Turn a receive message from an I2O controller bus address into
1068 * a Linux virtual address. The shared page frame is a linear block
1069 * so we simply have to shift the offset. This function does not
1070 * work for sender side messages as they are ioremap objects
1071 * provided by the I2O controller.
1073 static inline struct i2o_message *i2o_msg_out_to_virt(struct i2o_controller *c,
1076 BUG_ON(m < c->out_queue.phys
1077 || m >= c->out_queue.phys + c->out_queue.len);
1079 return c->out_queue.virt + (m - c->out_queue.phys);
1083 * i2o_msg_in_to_virt - Turn an I2O message to a virtual address
1085 * @m: message engine value
1087 * Turn a send message from an I2O controller bus address into
1088 * a Linux virtual address. The shared page frame is a linear block
1089 * so we simply have to shift the offset. This function does not
1090 * work for receive side messages as they are kmalloc objects
1091 * in a different pool.
1093 static inline struct i2o_message __iomem *i2o_msg_in_to_virt(struct
1097 return c->in_queue.virt + m;
1101 * i2o_msg_get - obtain an I2O message from the IOP
1102 * @c: I2O controller
1104 * This function tries to get a message frame. If no message frame is
1105 * available do not wait until one is availabe (see also i2o_msg_get_wait).
1106 * The returned pointer to the message frame is not in I/O memory, it is
1107 * allocated from a mempool. But because a MFA is allocated from the
1108 * controller too it is guaranteed that i2o_msg_post() will never fail.
1110 * On a success a pointer to the message frame is returned. If the message
1111 * queue is empty -EBUSY is returned and if no memory is available -ENOMEM
1114 static inline struct i2o_message *i2o_msg_get(struct i2o_controller *c)
1116 struct i2o_msg_mfa *mmsg = mempool_alloc(c->in_msg.mempool, GFP_ATOMIC);
1118 return ERR_PTR(-ENOMEM);
1120 mmsg->mfa = readl(c->in_port);
1121 if (unlikely(mmsg->mfa >= c->in_queue.len)) {
1122 u32 mfa = mmsg->mfa;
1124 mempool_free(mmsg, c->in_msg.mempool);
1126 if (mfa == I2O_QUEUE_EMPTY)
1127 return ERR_PTR(-EBUSY);
1128 return ERR_PTR(-EFAULT);
1135 * i2o_msg_post - Post I2O message to I2O controller
1136 * @c: I2O controller to which the message should be send
1137 * @msg: message returned by i2o_msg_get()
1139 * Post the message to the I2O controller and return immediately.
1141 static inline void i2o_msg_post(struct i2o_controller *c,
1142 struct i2o_message *msg)
1144 struct i2o_msg_mfa *mmsg;
1146 mmsg = container_of(msg, struct i2o_msg_mfa, msg);
1147 memcpy_toio(i2o_msg_in_to_virt(c, mmsg->mfa), msg,
1148 (le32_to_cpu(msg->u.head[0]) >> 16) << 2);
1149 writel(mmsg->mfa, c->in_port);
1150 mempool_free(mmsg, c->in_msg.mempool);
1154 * i2o_msg_post_wait - Post and wait a message and wait until return
1156 * @msg: message to post
1157 * @timeout: time in seconds to wait
1159 * This API allows an OSM to post a message and then be told whether or
1160 * not the system received a successful reply. If the message times out
1161 * then the value '-ETIMEDOUT' is returned.
1163 * Returns 0 on success or negative error code on failure.
1165 static inline int i2o_msg_post_wait(struct i2o_controller *c,
1166 struct i2o_message *msg,
1167 unsigned long timeout)
1169 return i2o_msg_post_wait_mem(c, msg, timeout, NULL);
1173 * i2o_msg_nop_mfa - Returns a fetched MFA back to the controller
1174 * @c: I2O controller from which the MFA was fetched
1175 * @mfa: MFA which should be returned
1177 * This function must be used for preserved messages, because i2o_msg_nop()
1178 * also returns the allocated memory back to the msg_pool mempool.
1180 static inline void i2o_msg_nop_mfa(struct i2o_controller *c, u32 mfa)
1182 struct i2o_message __iomem *msg;
1184 THREE_WORD_MSG_SIZE | SGL_OFFSET_0,
1185 I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | ADAPTER_TID,
1189 msg = i2o_msg_in_to_virt(c, mfa);
1190 memcpy_toio(msg, nop, sizeof(nop));
1191 writel(mfa, c->in_port);
1195 * i2o_msg_nop - Returns a message which is not used
1196 * @c: I2O controller from which the message was created
1197 * @msg: message which should be returned
1199 * If you fetch a message via i2o_msg_get, and can't use it, you must
1200 * return the message with this function. Otherwise the MFA is lost as well
1201 * as the allocated memory from the mempool.
1203 static inline void i2o_msg_nop(struct i2o_controller *c,
1204 struct i2o_message *msg)
1206 struct i2o_msg_mfa *mmsg;
1207 mmsg = container_of(msg, struct i2o_msg_mfa, msg);
1209 i2o_msg_nop_mfa(c, mmsg->mfa);
1210 mempool_free(mmsg, c->in_msg.mempool);
1214 * i2o_flush_reply - Flush reply from I2O controller
1215 * @c: I2O controller
1216 * @m: the message identifier
1218 * The I2O controller must be informed that the reply message is not needed
1219 * anymore. If you forget to flush the reply, the message frame can't be
1220 * used by the controller anymore and is therefore lost.
1222 static inline void i2o_flush_reply(struct i2o_controller *c, u32 m)
1224 writel(m, c->out_port);
1228 * Endian handling wrapped into the macro - keeps the core code
1232 #define i2o_raw_writel(val, mem) __raw_writel(cpu_to_le32(val), mem)
1234 extern int i2o_parm_field_get(struct i2o_device *, int, int, void *, int);
1235 extern int i2o_parm_table_get(struct i2o_device *, int, int, int, void *, int,
1238 /* debugging and troubleshooting/diagnostic helpers. */
1239 #define osm_printk(level, format, arg...) \
1240 printk(level "%s: " format, OSM_NAME , ## arg)
1243 #define osm_debug(format, arg...) \
1244 osm_printk(KERN_DEBUG, format , ## arg)
1246 #define osm_debug(format, arg...) \
1250 #define osm_err(format, arg...) \
1251 osm_printk(KERN_ERR, format , ## arg)
1252 #define osm_info(format, arg...) \
1253 osm_printk(KERN_INFO, format , ## arg)
1254 #define osm_warn(format, arg...) \
1255 osm_printk(KERN_WARNING, format , ## arg)
1257 /* debugging functions */
1258 extern void i2o_report_status(const char *, const char *, struct i2o_message *);
1259 extern void i2o_dump_message(struct i2o_message *);
1260 extern void i2o_dump_hrt(struct i2o_controller *c);
1261 extern void i2o_debug_state(struct i2o_controller *c);
1263 #endif /* __KERNEL__ */