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/list.h>
34 #include <asm/semaphore.h>
35 #include <scsi/scsi_device.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_transport_sas.h>
48 PHY_ROLE_TARGET = 0x40,
49 PHY_ROLE_INITIATOR = 0x80,
57 /* The events are mnemonically described in sas_dump.c
58 * so when updating/adding events here, please also
59 * update the other file too.
67 PORTE_BYTES_DMAED = 0U,
68 PORTE_BROADCAST_RCVD = 1,
69 PORTE_LINK_RESET_ERR = 2,
70 PORTE_TIMER_EVENT = 3,
76 PHYE_LOSS_OF_SIGNAL = 0U,
79 PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */
84 DISCE_DISCOVER_DOMAIN = 0U,
85 DISCE_REVALIDATE_DOMAIN = 1,
90 /* ---------- 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_proto attached_tproto;
124 enum sas_proto 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 /* ---------- Domain device ---------- */
170 struct domain_device {
171 enum sas_dev_type dev_type;
173 enum sas_linkrate linkrate;
174 enum sas_linkrate min_linkrate;
175 enum sas_linkrate max_linkrate;
179 struct domain_device *parent;
180 struct list_head siblings; /* devices on the same level */
181 struct asd_sas_port *port; /* shortcut to root of the tree */
183 struct list_head dev_list_node;
185 enum sas_proto iproto;
186 enum sas_proto tproto;
188 struct sas_rphy *rphy;
190 u8 sas_addr[SAS_ADDR_SIZE];
191 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
196 struct expander_device ex_dev;
197 struct sata_device sata_dev; /* STP & directly attached */
203 struct sas_discovery {
204 spinlock_t disc_event_lock;
205 struct work_struct disc_work[DISC_NUM_EVENTS];
206 unsigned long pending;
207 u8 fanout_sas_addr[8];
214 /* The port struct is Class:RW, driver:RO */
215 struct asd_sas_port {
217 struct completion port_gone_completion;
219 struct sas_discovery disc;
220 struct domain_device *port_dev;
221 spinlock_t dev_list_lock;
222 struct list_head dev_list;
223 enum sas_linkrate linkrate;
226 struct work_struct work;
231 enum sas_class class;
232 u8 sas_addr[SAS_ADDR_SIZE];
233 u8 attached_sas_addr[SAS_ADDR_SIZE];
234 enum sas_proto iproto;
235 enum sas_proto tproto;
237 enum sas_oob_mode oob_mode;
239 spinlock_t phy_list_lock;
240 struct list_head phy_list;
244 struct sas_ha_struct *ha;
246 struct sas_port *port;
248 void *lldd_port; /* not touched by the sas class code */
251 /* The phy pretty much is controlled by the LLDD.
252 * The class only reads those fields.
256 /* protected by ha->event_lock */
257 struct work_struct port_events[PORT_NUM_EVENTS];
258 struct work_struct phy_events[PHY_NUM_EVENTS];
260 unsigned long port_events_pending;
261 unsigned long phy_events_pending;
268 /* The following are class:RO, driver:R/W */
269 int enabled; /* must be set */
271 int id; /* must be set */
272 enum sas_class class;
273 enum sas_proto iproto;
274 enum sas_proto tproto;
276 enum sas_phy_type type;
277 enum sas_phy_role role;
278 enum sas_oob_mode oob_mode;
279 enum sas_linkrate linkrate;
281 u8 *sas_addr; /* must be set */
282 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
284 spinlock_t frame_rcvd_lock;
285 u8 *frame_rcvd; /* must be set */
288 spinlock_t sas_prim_lock;
291 struct list_head port_phy_el; /* driver:RO */
292 struct asd_sas_port *port; /* Class:RW, driver: RO */
294 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
296 void *lldd_phy; /* not touched by the sas_class_code */
300 struct Scsi_Host *shost;
302 spinlock_t task_queue_lock;
303 struct list_head task_queue;
306 struct semaphore queue_thread_sema;
307 int queue_thread_kill;
310 struct sas_ha_struct {
312 spinlock_t event_lock;
313 struct work_struct ha_events[HA_NUM_EVENTS];
314 unsigned long pending;
316 struct scsi_core core;
320 struct pci_dev *pcidev; /* should be set */
321 struct module *lldd_module; /* should be set */
323 u8 *sas_addr; /* must be set */
324 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
326 spinlock_t phy_port_lock;
327 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
328 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
329 int num_phys; /* must be set, gt 0, static */
331 /* The class calls this to send a task for execution. */
332 int lldd_max_execute_num;
335 /* LLDD calls these to notify the class of an event. */
336 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
337 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
338 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
340 void *lldd_ha; /* not touched by sas class code */
343 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
345 static inline struct domain_device *
346 starget_to_domain_dev(struct scsi_target *starget) {
347 return starget->hostdata;
350 static inline struct domain_device *
351 sdev_to_domain_dev(struct scsi_device *sdev) {
352 return starget_to_domain_dev(sdev->sdev_target);
355 static inline struct domain_device *
356 cmd_to_domain_dev(struct scsi_cmnd *cmd)
358 return sdev_to_domain_dev(cmd->device);
361 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
363 /* Before calling a notify event, LLDD should use this function
364 * when the link is severed (possibly from its tasklet).
365 * The idea is that the Class only reads those, while the LLDD,
366 * can R/W these (thus avoiding a race).
368 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
370 phy->oob_mode = OOB_NOT_CONNECTED;
371 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
374 /* ---------- Tasks ---------- */
376 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
378 ---------------------+---------------------+-----------------------+
380 DEV_NO_RESPONSE | X | X |
383 DEVICE_UNKNOWN | | X |
385 ---------------------+---------------------+-----------------------+
388 enum service_response {
390 SAS_TASK_UNDELIVERED = -1,
398 SAM_INTERMEDIATE = 0x10,
399 SAM_IM_COND_MET = 0x12,
400 SAM_RESV_CONFLICT= 0x14,
401 SAM_TASK_SET_FULL= 0x28,
402 SAM_ACA_ACTIVE = 0x30,
403 SAM_TASK_ABORTED = 0x40,
405 SAS_DEV_NO_RESPONSE = 0x80,
421 /* When a task finishes with a response, the LLDD examines the
423 * - For an ATA task task_status_struct::stat is set to
424 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
425 * contents of struct ata_task_resp.
426 * - For SSP tasks, if no data is present or status/TMF response
427 * is valid, task_status_struct::stat is set. If data is present
428 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
429 * task_status_struct::buf_valid_size, and task_status_struct::stat is
430 * set to SAM_CHECK_COND.
432 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
435 * "frame_len" is the total frame length, which could be more or less
436 * than actually copied.
438 * Tasks ending with response, always set the residual field.
440 struct ata_task_resp {
442 u8 ending_fis[24]; /* dev to host or data-in */
449 #define SAS_STATUS_BUF_SIZE 96
451 struct task_status_struct {
452 enum service_response resp;
453 enum exec_status stat;
456 u8 buf[SAS_STATUS_BUF_SIZE];
459 enum sas_open_rej_reason open_rej_reason;
462 /* ATA and ATAPI task queuable to a SAS LLDD.
464 struct sas_ata_task {
465 struct host_to_dev_fis fis;
466 u8 atapi_packet[16]; /* 0 if not ATAPI task */
468 u8 retry_count; /* hardware retry, should be > 0 */
470 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
475 u8 device_control_reg_update:1;
478 struct sas_smp_task {
479 struct scatterlist smp_req;
480 struct scatterlist smp_resp;
483 enum task_attribute {
484 TASK_ATTR_SIMPLE = 0,
486 TASK_ATTR_ORDERED= 2,
490 struct sas_ssp_task {
491 u8 retry_count; /* hardware retry, should be > 0 */
494 u8 enable_first_burst:1;
495 enum task_attribute task_attr;
501 struct domain_device *dev;
502 struct list_head list;
504 spinlock_t task_state_lock;
505 unsigned task_state_flags;
507 enum sas_proto task_proto;
509 /* Used by the discovery code. */
510 struct timer_list timer;
511 struct completion completion;
514 struct sas_ata_task ata_task;
515 struct sas_smp_task smp_task;
516 struct sas_ssp_task ssp_task;
519 struct scatterlist *scatter;
522 u8 data_dir:2; /* Use PCI_DMA_... */
524 struct task_status_struct task_status;
525 void (*task_done)(struct sas_task *);
527 void *lldd_task; /* for use by LLDDs */
533 #define SAS_TASK_STATE_PENDING 1
534 #define SAS_TASK_STATE_DONE 2
535 #define SAS_TASK_STATE_ABORTED 4
537 static inline struct sas_task *sas_alloc_task(gfp_t flags)
539 extern kmem_cache_t *sas_task_cache;
540 struct sas_task *task = kmem_cache_alloc(sas_task_cache, flags);
543 memset(task, 0, sizeof(*task));
544 INIT_LIST_HEAD(&task->list);
545 spin_lock_init(&task->task_state_lock);
546 task->task_state_flags = SAS_TASK_STATE_PENDING;
547 init_timer(&task->timer);
548 init_completion(&task->completion);
554 static inline void sas_free_task(struct sas_task *task)
557 extern kmem_cache_t *sas_task_cache;
558 BUG_ON(!list_empty(&task->list));
559 kmem_cache_free(sas_task_cache, task);
563 struct sas_domain_function_template {
564 /* The class calls these to notify the LLDD of an event. */
565 void (*lldd_port_formed)(struct asd_sas_phy *);
566 void (*lldd_port_deformed)(struct asd_sas_phy *);
568 /* The class calls these when a device is found or gone. */
569 int (*lldd_dev_found)(struct domain_device *);
570 void (*lldd_dev_gone)(struct domain_device *);
572 int (*lldd_execute_task)(struct sas_task *, int num,
575 /* Task Management Functions. Must be called from process context. */
576 int (*lldd_abort_task)(struct sas_task *);
577 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
578 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
579 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
580 int (*lldd_I_T_nexus_reset)(struct domain_device *);
581 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
582 int (*lldd_query_task)(struct sas_task *);
584 /* Port and Adapter management */
585 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
586 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
589 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
592 extern int sas_register_ha(struct sas_ha_struct *);
593 extern int sas_unregister_ha(struct sas_ha_struct *);
595 extern int sas_queuecommand(struct scsi_cmnd *,
596 void (*scsi_done)(struct scsi_cmnd *));
597 extern int sas_target_alloc(struct scsi_target *);
598 extern int sas_slave_alloc(struct scsi_device *);
599 extern int sas_slave_configure(struct scsi_device *);
600 extern void sas_slave_destroy(struct scsi_device *);
601 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
602 extern int sas_change_queue_type(struct scsi_device *, int qt);
603 extern int sas_bios_param(struct scsi_device *,
604 struct block_device *,
605 sector_t capacity, int *hsc);
606 extern struct scsi_transport_template *
607 sas_domain_attach_transport(struct sas_domain_function_template *);
608 extern void sas_domain_release_transport(struct scsi_transport_template *);
610 int sas_discover_root_expander(struct domain_device *);
612 void sas_init_ex_attr(void);
614 int sas_ex_revalidate_domain(struct domain_device *);
616 void sas_unregister_domain_devices(struct asd_sas_port *port);
617 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
618 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
620 int sas_discover_sata(struct domain_device *);
621 int sas_discover_end_dev(struct domain_device *);
623 void sas_unregister_dev(struct domain_device *);
625 void sas_init_dev(struct domain_device *);
627 #endif /* _SASLIB_H_ */