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 <scsi/scsi_device.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_transport_sas.h>
38 #include <linux/scatterlist.h>
39 #include <linux/slab.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 */
82 PHYE_RESUME_TIMEOUT = 4,
87 DISCE_DISCOVER_DOMAIN = 0U,
88 DISCE_REVALIDATE_DOMAIN = 1,
97 /* ---------- Expander Devices ---------- */
99 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
100 #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
103 enum routing_attribute {
113 PHY_DEVICE_DISCOVERED
119 enum ex_phy_state phy_state;
121 enum sas_device_type attached_dev_type;
122 enum sas_linkrate linkrate;
124 u8 attached_sata_host:1;
125 u8 attached_sata_dev:1;
126 u8 attached_sata_ps:1;
128 enum sas_protocol attached_tproto;
129 enum sas_protocol attached_iproto;
131 u8 attached_sas_addr[SAS_ADDR_SIZE];
134 int phy_change_count;
135 enum routing_attribute routing_attr;
141 struct sas_port *port;
144 struct expander_device {
145 struct list_head children;
148 u16 max_route_indexes;
153 u8 conf_route_table:1;
155 u8 enclosure_logical_id[8];
157 struct ex_phy *ex_phy;
158 struct sas_port *parent_port;
160 struct mutex cmd_mutex;
163 /* ---------- SATA device ---------- */
164 #define ATA_RESP_FIS_SIZE 24
168 struct smp_resp rps_resp; /* report_phy_sata_resp */
169 u8 port_no; /* port number, if this is a PM (Port) */
172 struct ata_host ata_host;
173 u8 fis[ATA_RESP_FIS_SIZE];
177 struct list_head eh_list_node; /* pending a user requested eh action */
178 struct scsi_lun reset_lun;
183 SAS_DEV_FOUND, /* device notified to lldd */
190 struct domain_device {
191 spinlock_t done_lock;
192 enum sas_device_type dev_type;
194 enum sas_linkrate linkrate;
195 enum sas_linkrate min_linkrate;
196 enum sas_linkrate max_linkrate;
200 struct domain_device *parent;
201 struct list_head siblings; /* devices on the same level */
202 struct asd_sas_port *port; /* shortcut to root of the tree */
205 struct list_head dev_list_node;
206 struct list_head disco_list_node; /* awaiting probe or destruct */
208 enum sas_protocol iproto;
209 enum sas_protocol tproto;
211 struct sas_rphy *rphy;
213 u8 sas_addr[SAS_ADDR_SIZE];
214 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
219 struct expander_device ex_dev;
220 struct sata_device sata_dev; /* STP & directly attached */
221 struct ssp_device ssp_dev;
230 struct list_head drain_node;
231 struct work_struct work;
234 static inline void INIT_SAS_WORK(struct sas_work *sw, void (*fn)(struct work_struct *))
236 INIT_WORK(&sw->work, fn);
237 INIT_LIST_HEAD(&sw->drain_node);
240 struct sas_discovery_event {
241 struct sas_work work;
242 struct asd_sas_port *port;
245 static inline struct sas_discovery_event *to_sas_discovery_event(struct work_struct *work)
247 struct sas_discovery_event *ev = container_of(work, typeof(*ev), work.work);
252 struct sas_discovery {
253 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
254 unsigned long pending;
255 u8 fanout_sas_addr[8];
261 /* The port struct is Class:RW, driver:RO */
262 struct asd_sas_port {
264 struct completion port_gone_completion;
266 struct sas_discovery disc;
267 struct domain_device *port_dev;
268 spinlock_t dev_list_lock;
269 struct list_head dev_list;
270 struct list_head disco_list;
271 struct list_head destroy_list;
272 enum sas_linkrate linkrate;
274 struct sas_work work;
280 enum sas_class class;
281 u8 sas_addr[SAS_ADDR_SIZE];
282 u8 attached_sas_addr[SAS_ADDR_SIZE];
283 enum sas_protocol iproto;
284 enum sas_protocol tproto;
286 enum sas_oob_mode oob_mode;
288 spinlock_t phy_list_lock;
289 struct list_head phy_list;
293 struct sas_ha_struct *ha;
295 struct sas_port *port;
297 void *lldd_port; /* not touched by the sas class code */
300 struct asd_sas_event {
301 struct sas_work work;
302 struct asd_sas_phy *phy;
305 static inline struct asd_sas_event *to_asd_sas_event(struct work_struct *work)
307 struct asd_sas_event *ev = container_of(work, typeof(*ev), work.work);
312 /* The phy pretty much is controlled by the LLDD.
313 * The class only reads those fields.
317 struct asd_sas_event port_events[PORT_NUM_EVENTS];
318 struct asd_sas_event phy_events[PHY_NUM_EVENTS];
320 unsigned long port_events_pending;
321 unsigned long phy_events_pending;
329 /* The following are class:RO, driver:R/W */
330 int enabled; /* must be set */
332 int id; /* must be set */
333 enum sas_class class;
334 enum sas_protocol iproto;
335 enum sas_protocol tproto;
337 enum sas_phy_type type;
338 enum sas_phy_role role;
339 enum sas_oob_mode oob_mode;
340 enum sas_linkrate linkrate;
342 u8 *sas_addr; /* must be set */
343 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
345 spinlock_t frame_rcvd_lock;
346 u8 *frame_rcvd; /* must be set */
349 spinlock_t sas_prim_lock;
352 struct list_head port_phy_el; /* driver:RO */
353 struct asd_sas_port *port; /* Class:RW, driver: RO */
355 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
357 void *lldd_phy; /* not touched by the sas_class_code */
361 struct Scsi_Host *shost;
365 struct sas_ha_event {
366 struct sas_work work;
367 struct sas_ha_struct *ha;
370 static inline struct sas_ha_event *to_sas_ha_event(struct work_struct *work)
372 struct sas_ha_event *ev = container_of(work, typeof(*ev), work.work);
380 SAS_HA_ATA_EH_ACTIVE,
384 struct sas_ha_struct {
386 struct sas_ha_event ha_events[HA_NUM_EVENTS];
387 unsigned long pending;
389 struct list_head defer_q; /* work queued while draining */
390 struct mutex drain_mutex;
394 wait_queue_head_t eh_wait_q;
395 struct list_head eh_dev_q;
397 struct mutex disco_mutex;
399 struct scsi_core core;
403 struct device *dev; /* should be set */
404 struct module *lldd_module; /* should be set */
406 u8 *sas_addr; /* must be set */
407 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
409 spinlock_t phy_port_lock;
410 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
411 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
412 int num_phys; /* must be set, gt 0, static */
414 int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
415 * their siblings when forming wide ports */
417 /* LLDD calls these to notify the class of an event. */
418 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
419 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
420 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
422 void *lldd_ha; /* not touched by sas class code */
424 struct list_head eh_done_q; /* complete via scsi_eh_flush_done_q */
425 struct list_head eh_ata_q; /* scmds to promote from sas to ata eh */
428 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
430 static inline struct domain_device *
431 starget_to_domain_dev(struct scsi_target *starget) {
432 return starget->hostdata;
435 static inline struct domain_device *
436 sdev_to_domain_dev(struct scsi_device *sdev) {
437 return starget_to_domain_dev(sdev->sdev_target);
440 static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev)
442 return &dev->sata_dev.ap->link.device[0];
445 static inline struct domain_device *
446 cmd_to_domain_dev(struct scsi_cmnd *cmd)
448 return sdev_to_domain_dev(cmd->device);
451 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
453 /* Before calling a notify event, LLDD should use this function
454 * when the link is severed (possibly from its tasklet).
455 * The idea is that the Class only reads those, while the LLDD,
456 * can R/W these (thus avoiding a race).
458 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
460 phy->oob_mode = OOB_NOT_CONNECTED;
461 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
464 static inline unsigned int to_sas_gpio_od(int device, int bit)
466 return 3 * device + bit;
469 static inline void sas_put_local_phy(struct sas_phy *phy)
471 put_device(&phy->dev);
474 #ifdef CONFIG_SCSI_SAS_HOST_SMP
475 int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
477 static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count)
483 /* ---------- Tasks ---------- */
485 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
487 ---------------------+---------------------+-----------------------+
489 DEV_NO_RESPONSE | X | X |
492 DEVICE_UNKNOWN | | X |
494 ---------------------+---------------------+-----------------------+
497 enum service_response {
499 SAS_TASK_UNDELIVERED = -1,
503 /* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
504 * them here to silence 'case value not in enumerated type' warnings
506 __SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
508 SAS_DEV_NO_RESPONSE = 0x80,
524 /* When a task finishes with a response, the LLDD examines the
526 * - For an ATA task task_status_struct::stat is set to
527 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
528 * contents of struct ata_task_resp.
529 * - For SSP tasks, if no data is present or status/TMF response
530 * is valid, task_status_struct::stat is set. If data is present
531 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
532 * task_status_struct::buf_valid_size, and task_status_struct::stat is
533 * set to SAM_CHECK_COND.
535 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
538 * "frame_len" is the total frame length, which could be more or less
539 * than actually copied.
541 * Tasks ending with response, always set the residual field.
543 struct ata_task_resp {
545 u8 ending_fis[ATA_RESP_FIS_SIZE]; /* dev to host or data-in */
548 #define SAS_STATUS_BUF_SIZE 96
550 struct task_status_struct {
551 enum service_response resp;
552 enum exec_status stat;
555 u8 buf[SAS_STATUS_BUF_SIZE];
558 enum sas_open_rej_reason open_rej_reason;
561 /* ATA and ATAPI task queuable to a SAS LLDD.
563 struct sas_ata_task {
564 struct host_to_dev_fis fis;
565 u8 atapi_packet[16]; /* 0 if not ATAPI task */
567 u8 retry_count; /* hardware retry, should be > 0 */
569 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
574 u8 device_control_reg_update:1;
577 struct sas_smp_task {
578 struct scatterlist smp_req;
579 struct scatterlist smp_resp;
582 enum task_attribute {
583 TASK_ATTR_SIMPLE = 0,
585 TASK_ATTR_ORDERED= 2,
589 struct sas_ssp_task {
590 u8 retry_count; /* hardware retry, should be > 0 */
593 u8 enable_first_burst:1;
594 enum task_attribute task_attr;
596 struct scsi_cmnd *cmd;
600 struct domain_device *dev;
602 spinlock_t task_state_lock;
603 unsigned task_state_flags;
605 enum sas_protocol task_proto;
608 struct sas_ata_task ata_task;
609 struct sas_smp_task smp_task;
610 struct sas_ssp_task ssp_task;
613 struct scatterlist *scatter;
616 u8 data_dir:2; /* Use PCI_DMA_... */
618 struct task_status_struct task_status;
619 void (*task_done)(struct sas_task *);
621 void *lldd_task; /* for use by LLDDs */
623 struct sas_task_slow *slow_task;
626 struct sas_task_slow {
627 /* standard/extra infrastructure for slow path commands (SMP and
628 * internal lldd commands
630 struct timer_list timer;
631 struct completion completion;
634 #define SAS_TASK_STATE_PENDING 1
635 #define SAS_TASK_STATE_DONE 2
636 #define SAS_TASK_STATE_ABORTED 4
637 #define SAS_TASK_NEED_DEV_RESET 8
638 #define SAS_TASK_AT_INITIATOR 16
640 extern struct sas_task *sas_alloc_task(gfp_t flags);
641 extern struct sas_task *sas_alloc_slow_task(gfp_t flags);
642 extern void sas_free_task(struct sas_task *task);
644 struct sas_domain_function_template {
645 /* The class calls these to notify the LLDD of an event. */
646 void (*lldd_port_formed)(struct asd_sas_phy *);
647 void (*lldd_port_deformed)(struct asd_sas_phy *);
649 /* The class calls these when a device is found or gone. */
650 int (*lldd_dev_found)(struct domain_device *);
651 void (*lldd_dev_gone)(struct domain_device *);
653 int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
655 /* Task Management Functions. Must be called from process context. */
656 int (*lldd_abort_task)(struct sas_task *);
657 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
658 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
659 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
660 int (*lldd_I_T_nexus_reset)(struct domain_device *);
661 int (*lldd_ata_check_ready)(struct domain_device *);
662 void (*lldd_ata_set_dmamode)(struct domain_device *);
663 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
664 int (*lldd_query_task)(struct sas_task *);
666 /* Port and Adapter management */
667 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
668 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
671 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
674 int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type,
675 u8 reg_index, u8 reg_count, u8 *write_data);
678 extern int sas_register_ha(struct sas_ha_struct *);
679 extern int sas_unregister_ha(struct sas_ha_struct *);
680 extern void sas_prep_resume_ha(struct sas_ha_struct *sas_ha);
681 extern void sas_resume_ha(struct sas_ha_struct *sas_ha);
682 extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
684 int sas_set_phy_speed(struct sas_phy *phy,
685 struct sas_phy_linkrates *rates);
686 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
687 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
688 extern int sas_target_alloc(struct scsi_target *);
689 extern int sas_slave_configure(struct scsi_device *);
690 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
691 extern int sas_bios_param(struct scsi_device *,
692 struct block_device *,
693 sector_t capacity, int *hsc);
694 extern struct scsi_transport_template *
695 sas_domain_attach_transport(struct sas_domain_function_template *);
696 extern void sas_domain_release_transport(struct scsi_transport_template *);
698 int sas_discover_root_expander(struct domain_device *);
700 void sas_init_ex_attr(void);
702 int sas_ex_revalidate_domain(struct domain_device *);
704 void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
705 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
706 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
708 int sas_discover_sata(struct domain_device *);
709 int sas_discover_end_dev(struct domain_device *);
711 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *);
713 void sas_init_dev(struct domain_device *);
715 void sas_task_abort(struct sas_task *);
716 int sas_eh_abort_handler(struct scsi_cmnd *cmd);
717 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
718 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
720 extern void sas_target_destroy(struct scsi_target *);
721 extern int sas_slave_alloc(struct scsi_device *);
722 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
723 extern int sas_drain_work(struct sas_ha_struct *ha);
725 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
726 struct request *req);
728 extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
729 struct ssp_response_iu *iu);
730 struct sas_phy *sas_get_local_phy(struct domain_device *dev);
732 int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
734 #endif /* _SASLIB_H_ */