2 * SAS host prototypes and structures header file
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 * This file is licensed under GPLv2.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <linux/timer.h>
31 #include <linux/pci.h>
33 #include <linux/libata.h>
34 #include <linux/list.h>
35 #include <asm/semaphore.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <scsi/scsi_transport_sas.h>
39 #include <linux/scatterlist.h>
50 PHY_ROLE_TARGET = 0x40,
51 PHY_ROLE_INITIATOR = 0x80,
59 /* The events are mnemonically described in sas_dump.c
60 * so when updating/adding events here, please also
61 * update the other file too.
69 PORTE_BYTES_DMAED = 0U,
70 PORTE_BROADCAST_RCVD = 1,
71 PORTE_LINK_RESET_ERR = 2,
72 PORTE_TIMER_EVENT = 3,
78 PHYE_LOSS_OF_SIGNAL = 0U,
81 PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */
86 DISCE_DISCOVER_DOMAIN = 0U,
87 DISCE_REVALIDATE_DOMAIN = 1,
92 /* ---------- Expander Devices ---------- */
94 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
95 #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
98 enum routing_attribute {
108 PHY_DEVICE_DISCOVERED
114 enum ex_phy_state phy_state;
116 enum sas_dev_type attached_dev_type;
117 enum sas_linkrate linkrate;
119 u8 attached_sata_host:1;
120 u8 attached_sata_dev:1;
121 u8 attached_sata_ps:1;
123 enum sas_protocol attached_tproto;
124 enum sas_protocol attached_iproto;
126 u8 attached_sas_addr[SAS_ADDR_SIZE];
130 enum routing_attribute routing_attr;
136 struct sas_port *port;
139 struct expander_device {
140 struct list_head children;
143 u16 max_route_indexes;
146 u8 conf_route_table:1;
147 u8 enclosure_logical_id[8];
149 struct ex_phy *ex_phy;
150 struct sas_port *parent_port;
153 /* ---------- SATA device ---------- */
154 enum ata_command_set {
156 ATAPI_COMMAND_SET = 1,
160 enum ata_command_set command_set;
161 struct smp_resp rps_resp; /* report_phy_sata_resp */
162 __le16 *identify_device;
163 __le16 *identify_packet_device;
165 u8 port_no; /* port number, if this is a PM (Port) */
166 struct list_head children; /* PM Ports if this is a PM */
169 struct ata_host ata_host;
170 struct ata_taskfile tf;
176 /* ---------- Domain device ---------- */
177 struct domain_device {
178 enum sas_dev_type dev_type;
180 enum sas_linkrate linkrate;
181 enum sas_linkrate min_linkrate;
182 enum sas_linkrate max_linkrate;
186 struct domain_device *parent;
187 struct list_head siblings; /* devices on the same level */
188 struct asd_sas_port *port; /* shortcut to root of the tree */
190 struct list_head dev_list_node;
192 enum sas_protocol iproto;
193 enum sas_protocol tproto;
195 struct sas_rphy *rphy;
197 u8 sas_addr[SAS_ADDR_SIZE];
198 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
203 struct expander_device ex_dev;
204 struct sata_device sata_dev; /* STP & directly attached */
210 struct sas_discovery_event {
211 struct work_struct work;
212 struct asd_sas_port *port;
215 struct sas_discovery {
216 spinlock_t disc_event_lock;
217 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
218 unsigned long pending;
219 u8 fanout_sas_addr[8];
226 /* The port struct is Class:RW, driver:RO */
227 struct asd_sas_port {
229 struct completion port_gone_completion;
231 struct sas_discovery disc;
232 struct domain_device *port_dev;
233 spinlock_t dev_list_lock;
234 struct list_head dev_list;
235 enum sas_linkrate linkrate;
238 struct work_struct work;
243 enum sas_class class;
244 u8 sas_addr[SAS_ADDR_SIZE];
245 u8 attached_sas_addr[SAS_ADDR_SIZE];
246 enum sas_protocol iproto;
247 enum sas_protocol tproto;
249 enum sas_oob_mode oob_mode;
251 spinlock_t phy_list_lock;
252 struct list_head phy_list;
256 struct sas_ha_struct *ha;
258 struct sas_port *port;
260 void *lldd_port; /* not touched by the sas class code */
263 struct asd_sas_event {
264 struct work_struct work;
265 struct asd_sas_phy *phy;
268 /* The phy pretty much is controlled by the LLDD.
269 * The class only reads those fields.
273 /* protected by ha->event_lock */
274 struct asd_sas_event port_events[PORT_NUM_EVENTS];
275 struct asd_sas_event phy_events[PHY_NUM_EVENTS];
277 unsigned long port_events_pending;
278 unsigned long phy_events_pending;
285 /* The following are class:RO, driver:R/W */
286 int enabled; /* must be set */
288 int id; /* must be set */
289 enum sas_class class;
290 enum sas_protocol iproto;
291 enum sas_protocol tproto;
293 enum sas_phy_type type;
294 enum sas_phy_role role;
295 enum sas_oob_mode oob_mode;
296 enum sas_linkrate linkrate;
298 u8 *sas_addr; /* must be set */
299 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
301 spinlock_t frame_rcvd_lock;
302 u8 *frame_rcvd; /* must be set */
305 spinlock_t sas_prim_lock;
308 struct list_head port_phy_el; /* driver:RO */
309 struct asd_sas_port *port; /* Class:RW, driver: RO */
311 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
313 void *lldd_phy; /* not touched by the sas_class_code */
317 struct Scsi_Host *shost;
319 spinlock_t task_queue_lock;
320 struct list_head task_queue;
323 struct task_struct *queue_thread;
326 struct sas_ha_event {
327 struct work_struct work;
328 struct sas_ha_struct *ha;
336 struct sas_ha_struct {
338 spinlock_t event_lock;
339 struct sas_ha_event ha_events[HA_NUM_EVENTS];
340 unsigned long pending;
342 enum sas_ha_state state;
343 spinlock_t state_lock;
345 struct scsi_core core;
349 struct device *dev; /* should be set */
350 struct module *lldd_module; /* should be set */
352 u8 *sas_addr; /* must be set */
353 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
355 spinlock_t phy_port_lock;
356 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
357 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
358 int num_phys; /* must be set, gt 0, static */
360 /* The class calls this to send a task for execution. */
361 int lldd_max_execute_num;
364 /* LLDD calls these to notify the class of an event. */
365 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
366 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
367 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
369 void *lldd_ha; /* not touched by sas class code */
371 struct list_head eh_done_q;
374 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
376 static inline struct domain_device *
377 starget_to_domain_dev(struct scsi_target *starget) {
378 return starget->hostdata;
381 static inline struct domain_device *
382 sdev_to_domain_dev(struct scsi_device *sdev) {
383 return starget_to_domain_dev(sdev->sdev_target);
386 static inline struct domain_device *
387 cmd_to_domain_dev(struct scsi_cmnd *cmd)
389 return sdev_to_domain_dev(cmd->device);
392 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
394 /* Before calling a notify event, LLDD should use this function
395 * when the link is severed (possibly from its tasklet).
396 * The idea is that the Class only reads those, while the LLDD,
397 * can R/W these (thus avoiding a race).
399 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
401 phy->oob_mode = OOB_NOT_CONNECTED;
402 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
405 /* ---------- Tasks ---------- */
407 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
409 ---------------------+---------------------+-----------------------+
411 DEV_NO_RESPONSE | X | X |
414 DEVICE_UNKNOWN | | X |
416 ---------------------+---------------------+-----------------------+
419 enum service_response {
421 SAS_TASK_UNDELIVERED = -1,
429 SAM_INTERMEDIATE = 0x10,
430 SAM_IM_COND_MET = 0x12,
431 SAM_RESV_CONFLICT= 0x14,
432 SAM_TASK_SET_FULL= 0x28,
433 SAM_ACA_ACTIVE = 0x30,
434 SAM_TASK_ABORTED = 0x40,
436 SAS_DEV_NO_RESPONSE = 0x80,
452 /* When a task finishes with a response, the LLDD examines the
454 * - For an ATA task task_status_struct::stat is set to
455 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
456 * contents of struct ata_task_resp.
457 * - For SSP tasks, if no data is present or status/TMF response
458 * is valid, task_status_struct::stat is set. If data is present
459 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
460 * task_status_struct::buf_valid_size, and task_status_struct::stat is
461 * set to SAM_CHECK_COND.
463 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
466 * "frame_len" is the total frame length, which could be more or less
467 * than actually copied.
469 * Tasks ending with response, always set the residual field.
471 struct ata_task_resp {
473 u8 ending_fis[24]; /* dev to host or data-in */
480 #define SAS_STATUS_BUF_SIZE 96
482 struct task_status_struct {
483 enum service_response resp;
484 enum exec_status stat;
487 u8 buf[SAS_STATUS_BUF_SIZE];
490 enum sas_open_rej_reason open_rej_reason;
493 /* ATA and ATAPI task queuable to a SAS LLDD.
495 struct sas_ata_task {
496 struct host_to_dev_fis fis;
497 u8 atapi_packet[16]; /* 0 if not ATAPI task */
499 u8 retry_count; /* hardware retry, should be > 0 */
501 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
506 u8 device_control_reg_update:1;
509 struct sas_smp_task {
510 struct scatterlist smp_req;
511 struct scatterlist smp_resp;
514 enum task_attribute {
515 TASK_ATTR_SIMPLE = 0,
517 TASK_ATTR_ORDERED= 2,
521 struct sas_ssp_task {
522 u8 retry_count; /* hardware retry, should be > 0 */
525 u8 enable_first_burst:1;
526 enum task_attribute task_attr;
532 struct domain_device *dev;
533 struct list_head list;
535 spinlock_t task_state_lock;
536 unsigned task_state_flags;
538 enum sas_protocol task_proto;
540 /* Used by the discovery code. */
541 struct timer_list timer;
542 struct completion completion;
545 struct sas_ata_task ata_task;
546 struct sas_smp_task smp_task;
547 struct sas_ssp_task ssp_task;
550 struct scatterlist *scatter;
553 u8 data_dir:2; /* Use PCI_DMA_... */
555 struct task_status_struct task_status;
556 void (*task_done)(struct sas_task *);
558 void *lldd_task; /* for use by LLDDs */
561 struct work_struct abort_work;
564 extern struct kmem_cache *sas_task_cache;
566 #define SAS_TASK_STATE_PENDING 1
567 #define SAS_TASK_STATE_DONE 2
568 #define SAS_TASK_STATE_ABORTED 4
569 #define SAS_TASK_NEED_DEV_RESET 8
570 #define SAS_TASK_AT_INITIATOR 16
572 static inline struct sas_task *sas_alloc_task(gfp_t flags)
574 struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
577 INIT_LIST_HEAD(&task->list);
578 spin_lock_init(&task->task_state_lock);
579 task->task_state_flags = SAS_TASK_STATE_PENDING;
580 init_timer(&task->timer);
581 init_completion(&task->completion);
587 static inline void sas_free_task(struct sas_task *task)
590 BUG_ON(!list_empty(&task->list));
591 kmem_cache_free(sas_task_cache, task);
595 struct sas_domain_function_template {
596 /* The class calls these to notify the LLDD of an event. */
597 void (*lldd_port_formed)(struct asd_sas_phy *);
598 void (*lldd_port_deformed)(struct asd_sas_phy *);
600 /* The class calls these when a device is found or gone. */
601 int (*lldd_dev_found)(struct domain_device *);
602 void (*lldd_dev_gone)(struct domain_device *);
604 int (*lldd_execute_task)(struct sas_task *, int num,
607 /* Task Management Functions. Must be called from process context. */
608 int (*lldd_abort_task)(struct sas_task *);
609 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
610 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
611 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
612 int (*lldd_I_T_nexus_reset)(struct domain_device *);
613 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
614 int (*lldd_query_task)(struct sas_task *);
616 /* Port and Adapter management */
617 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
618 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
621 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
624 extern int sas_register_ha(struct sas_ha_struct *);
625 extern int sas_unregister_ha(struct sas_ha_struct *);
627 int sas_set_phy_speed(struct sas_phy *phy,
628 struct sas_phy_linkrates *rates);
629 int sas_phy_enable(struct sas_phy *phy, int enabled);
630 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
631 int sas_queue_up(struct sas_task *task);
632 extern int sas_queuecommand(struct scsi_cmnd *,
633 void (*scsi_done)(struct scsi_cmnd *));
634 extern int sas_target_alloc(struct scsi_target *);
635 extern int sas_slave_alloc(struct scsi_device *);
636 extern int sas_slave_configure(struct scsi_device *);
637 extern void sas_slave_destroy(struct scsi_device *);
638 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
639 extern int sas_change_queue_type(struct scsi_device *, int qt);
640 extern int sas_bios_param(struct scsi_device *,
641 struct block_device *,
642 sector_t capacity, int *hsc);
643 extern struct scsi_transport_template *
644 sas_domain_attach_transport(struct sas_domain_function_template *);
645 extern void sas_domain_release_transport(struct scsi_transport_template *);
647 int sas_discover_root_expander(struct domain_device *);
649 void sas_init_ex_attr(void);
651 int sas_ex_revalidate_domain(struct domain_device *);
653 void sas_unregister_domain_devices(struct asd_sas_port *port);
654 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
655 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
657 int sas_discover_sata(struct domain_device *);
658 int sas_discover_end_dev(struct domain_device *);
660 void sas_unregister_dev(struct domain_device *);
662 void sas_init_dev(struct domain_device *);
664 void sas_task_abort(struct sas_task *);
665 int __sas_task_abort(struct sas_task *);
666 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
667 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
669 extern void sas_target_destroy(struct scsi_target *);
670 extern int sas_slave_alloc(struct scsi_device *);
671 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
673 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
674 struct request *req);
676 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
677 struct ssp_response_iu *iu);
678 struct sas_phy *sas_find_local_phy(struct domain_device *dev);
680 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
682 #endif /* _SASLIB_H_ */