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 <asm/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 ---------- */
96 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
97 #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
100 enum routing_attribute {
110 PHY_DEVICE_DISCOVERED
116 enum ex_phy_state phy_state;
118 enum sas_dev_type attached_dev_type;
119 enum sas_linkrate linkrate;
121 u8 attached_sata_host:1;
122 u8 attached_sata_dev:1;
123 u8 attached_sata_ps:1;
125 enum sas_proto attached_tproto;
126 enum sas_proto attached_iproto;
128 u8 attached_sas_addr[SAS_ADDR_SIZE];
132 enum routing_attribute routing_attr;
138 struct sas_port *port;
141 struct expander_device {
142 struct list_head children;
145 u16 max_route_indexes;
148 u8 conf_route_table:1;
149 u8 enclosure_logical_id[8];
151 struct ex_phy *ex_phy;
152 struct sas_port *parent_port;
155 /* ---------- SATA device ---------- */
156 enum ata_command_set {
158 ATAPI_COMMAND_SET = 1,
162 enum ata_command_set command_set;
163 struct smp_resp rps_resp; /* report_phy_sata_resp */
164 __le16 *identify_device;
165 __le16 *identify_packet_device;
167 u8 port_no; /* port number, if this is a PM (Port) */
168 struct list_head children; /* PM Ports if this is a PM */
171 struct ata_host ata_host;
172 struct ata_taskfile tf;
178 /* ---------- Domain device ---------- */
179 struct domain_device {
180 enum sas_dev_type dev_type;
182 enum sas_linkrate linkrate;
183 enum sas_linkrate min_linkrate;
184 enum sas_linkrate max_linkrate;
188 struct domain_device *parent;
189 struct list_head siblings; /* devices on the same level */
190 struct asd_sas_port *port; /* shortcut to root of the tree */
192 struct list_head dev_list_node;
194 enum sas_proto iproto;
195 enum sas_proto tproto;
197 struct sas_rphy *rphy;
199 u8 sas_addr[SAS_ADDR_SIZE];
200 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
205 struct expander_device ex_dev;
206 struct sata_device sata_dev; /* STP & directly attached */
212 struct sas_discovery_event {
213 struct work_struct work;
214 struct asd_sas_port *port;
217 struct sas_discovery {
218 spinlock_t disc_event_lock;
219 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
220 unsigned long pending;
221 u8 fanout_sas_addr[8];
228 /* The port struct is Class:RW, driver:RO */
229 struct asd_sas_port {
231 struct completion port_gone_completion;
233 struct sas_discovery disc;
234 struct domain_device *port_dev;
235 spinlock_t dev_list_lock;
236 struct list_head dev_list;
237 enum sas_linkrate linkrate;
240 struct work_struct work;
245 enum sas_class class;
246 u8 sas_addr[SAS_ADDR_SIZE];
247 u8 attached_sas_addr[SAS_ADDR_SIZE];
248 enum sas_proto iproto;
249 enum sas_proto tproto;
251 enum sas_oob_mode oob_mode;
253 spinlock_t phy_list_lock;
254 struct list_head phy_list;
258 struct sas_ha_struct *ha;
260 struct sas_port *port;
262 void *lldd_port; /* not touched by the sas class code */
265 struct asd_sas_event {
266 struct work_struct work;
267 struct asd_sas_phy *phy;
270 /* The phy pretty much is controlled by the LLDD.
271 * The class only reads those fields.
275 /* protected by ha->event_lock */
276 struct asd_sas_event port_events[PORT_NUM_EVENTS];
277 struct asd_sas_event phy_events[PHY_NUM_EVENTS];
279 unsigned long port_events_pending;
280 unsigned long phy_events_pending;
287 /* The following are class:RO, driver:R/W */
288 int enabled; /* must be set */
290 int id; /* must be set */
291 enum sas_class class;
292 enum sas_proto iproto;
293 enum sas_proto tproto;
295 enum sas_phy_type type;
296 enum sas_phy_role role;
297 enum sas_oob_mode oob_mode;
298 enum sas_linkrate linkrate;
300 u8 *sas_addr; /* must be set */
301 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
303 spinlock_t frame_rcvd_lock;
304 u8 *frame_rcvd; /* must be set */
307 spinlock_t sas_prim_lock;
310 struct list_head port_phy_el; /* driver:RO */
311 struct asd_sas_port *port; /* Class:RW, driver: RO */
313 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
315 void *lldd_phy; /* not touched by the sas_class_code */
319 struct Scsi_Host *shost;
321 spinlock_t task_queue_lock;
322 struct list_head task_queue;
325 struct task_struct *queue_thread;
328 struct sas_ha_event {
329 struct work_struct work;
330 struct sas_ha_struct *ha;
338 struct sas_ha_struct {
340 spinlock_t event_lock;
341 struct sas_ha_event ha_events[HA_NUM_EVENTS];
342 unsigned long pending;
344 enum sas_ha_state state;
345 spinlock_t state_lock;
347 struct scsi_core core;
351 struct device *dev; /* should be set */
352 struct module *lldd_module; /* should be set */
354 u8 *sas_addr; /* must be set */
355 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
357 spinlock_t phy_port_lock;
358 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
359 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
360 int num_phys; /* must be set, gt 0, static */
362 /* The class calls this to send a task for execution. */
363 int lldd_max_execute_num;
366 /* LLDD calls these to notify the class of an event. */
367 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
368 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
369 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
371 void *lldd_ha; /* not touched by sas class code */
373 struct list_head eh_done_q;
376 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
378 static inline struct domain_device *
379 starget_to_domain_dev(struct scsi_target *starget) {
380 return starget->hostdata;
383 static inline struct domain_device *
384 sdev_to_domain_dev(struct scsi_device *sdev) {
385 return starget_to_domain_dev(sdev->sdev_target);
388 static inline struct domain_device *
389 cmd_to_domain_dev(struct scsi_cmnd *cmd)
391 return sdev_to_domain_dev(cmd->device);
394 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
396 /* Before calling a notify event, LLDD should use this function
397 * when the link is severed (possibly from its tasklet).
398 * The idea is that the Class only reads those, while the LLDD,
399 * can R/W these (thus avoiding a race).
401 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
403 phy->oob_mode = OOB_NOT_CONNECTED;
404 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
407 /* ---------- Tasks ---------- */
409 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
411 ---------------------+---------------------+-----------------------+
413 DEV_NO_RESPONSE | X | X |
416 DEVICE_UNKNOWN | | X |
418 ---------------------+---------------------+-----------------------+
421 enum service_response {
423 SAS_TASK_UNDELIVERED = -1,
431 SAM_INTERMEDIATE = 0x10,
432 SAM_IM_COND_MET = 0x12,
433 SAM_RESV_CONFLICT= 0x14,
434 SAM_TASK_SET_FULL= 0x28,
435 SAM_ACA_ACTIVE = 0x30,
436 SAM_TASK_ABORTED = 0x40,
438 SAS_DEV_NO_RESPONSE = 0x80,
454 /* When a task finishes with a response, the LLDD examines the
456 * - For an ATA task task_status_struct::stat is set to
457 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
458 * contents of struct ata_task_resp.
459 * - For SSP tasks, if no data is present or status/TMF response
460 * is valid, task_status_struct::stat is set. If data is present
461 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
462 * task_status_struct::buf_valid_size, and task_status_struct::stat is
463 * set to SAM_CHECK_COND.
465 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
468 * "frame_len" is the total frame length, which could be more or less
469 * than actually copied.
471 * Tasks ending with response, always set the residual field.
473 struct ata_task_resp {
475 u8 ending_fis[24]; /* dev to host or data-in */
482 #define SAS_STATUS_BUF_SIZE 96
484 struct task_status_struct {
485 enum service_response resp;
486 enum exec_status stat;
489 u8 buf[SAS_STATUS_BUF_SIZE];
492 enum sas_open_rej_reason open_rej_reason;
495 /* ATA and ATAPI task queuable to a SAS LLDD.
497 struct sas_ata_task {
498 struct host_to_dev_fis fis;
499 u8 atapi_packet[16]; /* 0 if not ATAPI task */
501 u8 retry_count; /* hardware retry, should be > 0 */
503 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
508 u8 device_control_reg_update:1;
511 struct sas_smp_task {
512 struct scatterlist smp_req;
513 struct scatterlist smp_resp;
516 enum task_attribute {
517 TASK_ATTR_SIMPLE = 0,
519 TASK_ATTR_ORDERED= 2,
523 struct sas_ssp_task {
524 u8 retry_count; /* hardware retry, should be > 0 */
527 u8 enable_first_burst:1;
528 enum task_attribute task_attr;
534 struct domain_device *dev;
535 struct list_head list;
537 spinlock_t task_state_lock;
538 unsigned task_state_flags;
540 enum sas_proto task_proto;
542 /* Used by the discovery code. */
543 struct timer_list timer;
544 struct completion completion;
547 struct sas_ata_task ata_task;
548 struct sas_smp_task smp_task;
549 struct sas_ssp_task ssp_task;
552 struct scatterlist *scatter;
555 u8 data_dir:2; /* Use PCI_DMA_... */
557 struct task_status_struct task_status;
558 void (*task_done)(struct sas_task *);
560 void *lldd_task; /* for use by LLDDs */
563 struct work_struct abort_work;
568 #define SAS_TASK_STATE_PENDING 1
569 #define SAS_TASK_STATE_DONE 2
570 #define SAS_TASK_STATE_ABORTED 4
571 #define SAS_TASK_NEED_DEV_RESET 8
572 #define SAS_TASK_AT_INITIATOR 16
574 static inline struct sas_task *sas_alloc_task(gfp_t flags)
576 extern struct kmem_cache *sas_task_cache;
577 struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
580 INIT_LIST_HEAD(&task->list);
581 spin_lock_init(&task->task_state_lock);
582 task->task_state_flags = SAS_TASK_STATE_PENDING;
583 init_timer(&task->timer);
584 init_completion(&task->completion);
590 static inline void sas_free_task(struct sas_task *task)
593 extern struct kmem_cache *sas_task_cache;
594 BUG_ON(!list_empty(&task->list));
595 kmem_cache_free(sas_task_cache, task);
599 struct sas_domain_function_template {
600 /* The class calls these to notify the LLDD of an event. */
601 void (*lldd_port_formed)(struct asd_sas_phy *);
602 void (*lldd_port_deformed)(struct asd_sas_phy *);
604 /* The class calls these when a device is found or gone. */
605 int (*lldd_dev_found)(struct domain_device *);
606 void (*lldd_dev_gone)(struct domain_device *);
608 int (*lldd_execute_task)(struct sas_task *, int num,
611 /* Task Management Functions. Must be called from process context. */
612 int (*lldd_abort_task)(struct sas_task *);
613 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
614 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
615 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
616 int (*lldd_I_T_nexus_reset)(struct domain_device *);
617 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
618 int (*lldd_query_task)(struct sas_task *);
620 /* Port and Adapter management */
621 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
622 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
625 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
628 extern int sas_register_ha(struct sas_ha_struct *);
629 extern int sas_unregister_ha(struct sas_ha_struct *);
631 int sas_set_phy_speed(struct sas_phy *phy,
632 struct sas_phy_linkrates *rates);
633 int sas_phy_enable(struct sas_phy *phy, int enabled);
634 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
635 int sas_queue_up(struct sas_task *task);
636 extern int sas_queuecommand(struct scsi_cmnd *,
637 void (*scsi_done)(struct scsi_cmnd *));
638 extern int sas_target_alloc(struct scsi_target *);
639 extern int sas_slave_alloc(struct scsi_device *);
640 extern int sas_slave_configure(struct scsi_device *);
641 extern void sas_slave_destroy(struct scsi_device *);
642 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
643 extern int sas_change_queue_type(struct scsi_device *, int qt);
644 extern int sas_bios_param(struct scsi_device *,
645 struct block_device *,
646 sector_t capacity, int *hsc);
647 extern struct scsi_transport_template *
648 sas_domain_attach_transport(struct sas_domain_function_template *);
649 extern void sas_domain_release_transport(struct scsi_transport_template *);
651 int sas_discover_root_expander(struct domain_device *);
653 void sas_init_ex_attr(void);
655 int sas_ex_revalidate_domain(struct domain_device *);
657 void sas_unregister_domain_devices(struct asd_sas_port *port);
658 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
659 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
661 int sas_discover_sata(struct domain_device *);
662 int sas_discover_end_dev(struct domain_device *);
664 void sas_unregister_dev(struct domain_device *);
666 void sas_init_dev(struct domain_device *);
668 void sas_task_abort(struct sas_task *);
669 int __sas_task_abort(struct sas_task *);
670 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
671 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
673 extern void sas_target_destroy(struct scsi_target *);
674 extern int sas_slave_alloc(struct scsi_device *);
675 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
677 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
678 struct request *req);
679 #endif /* _SASLIB_H_ */