2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
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30 * modification, are permitted provided that the following conditions
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58 #include "remote_device.h"
61 #include "state_machine.h"
62 #include "remote_node_table.h"
63 #include "registers.h"
64 #include "scu_unsolicited_frame.h"
65 #include "unsolicited_frame_control.h"
66 #include "probe_roms.h"
68 struct scic_sds_request
;
69 struct scu_task_context
;
73 * struct scic_power_control -
75 * This structure defines the fields for managing power control for direct
76 * attached disk devices.
78 struct scic_power_control
{
80 * This field is set when the power control timer is running and cleared when
86 * This field is the handle to the driver timer object. This timer is used to
87 * control when the directed attached disks can consume power.
92 * This field is used to keep track of how many phys are put into the
98 * This field is used to keep track of how many phys have been granted to consume power
100 u8 phys_granted_power
;
103 * This field is an array of phys that we are waiting on. The phys are direct
104 * mapped into requesters via struct scic_sds_phy.phy_index
106 struct scic_sds_phy
*requesters
[SCI_MAX_PHYS
];
110 struct scic_sds_port_configuration_agent
;
111 typedef void (*port_config_fn
)(struct scic_sds_controller
*,
112 struct scic_sds_port_configuration_agent
*,
113 struct scic_sds_port
*, struct scic_sds_phy
*);
115 struct scic_sds_port_configuration_agent
{
116 u16 phy_configured_mask
;
121 } phy_valid_port_range
[SCI_MAX_PHYS
];
123 port_config_fn link_up_handler
;
124 port_config_fn link_down_handler
;
125 struct sci_timer timer
;
129 * struct scic_sds_controller -
131 * This structure represents the SCU controller object.
133 struct scic_sds_controller
{
135 * This field contains the information for the base controller state
138 struct sci_base_state_machine state_machine
;
141 * This field is the driver timer object handler used to time the controller
142 * object start and stop requests.
147 * This field contains the user parameters to be utilized for this
148 * core controller object.
150 union scic_user_parameters user_parameters
;
153 * This field contains the OEM parameters to be utilized for this
154 * core controller object.
156 union scic_oem_parameters oem_parameters
;
159 * This field contains the port configuration agent for this controller.
161 struct scic_sds_port_configuration_agent port_agent
;
164 * This field is the array of device objects that are currently constructed
165 * for this controller object. This table is used as a fast lookup of device
166 * objects that need to handle device completion notifications from the
167 * hardware. The table is RNi based.
169 struct scic_sds_remote_device
*device_table
[SCI_MAX_REMOTE_DEVICES
];
172 * This field is the array of IO request objects that are currently active for
173 * this controller object. This table is used as a fast lookup of the io
174 * request object that need to handle completion queue notifications. The
175 * table is TCi based.
177 struct scic_sds_request
*io_request_table
[SCI_MAX_IO_REQUESTS
];
180 * This field is the free RNi data structure
182 struct scic_remote_node_table available_remote_nodes
;
185 * This field is the TCi pool used to manage the task context index.
187 SCI_POOL_CREATE(tci_pool
, u16
, SCI_MAX_IO_REQUESTS
);
190 * This filed is the struct scic_power_control data used to controll when direct
191 * attached devices can consume power.
193 struct scic_power_control power_control
;
196 * This field is the array of sequence values for the IO Tag fields. Even
197 * though only 4 bits of the field is used for the sequence the sequence is 16
198 * bits in size so the sequence can be bitwise or'd with the TCi to build the
201 u16 io_request_sequence
[SCI_MAX_IO_REQUESTS
];
204 * This field in the array of sequence values for the RNi. These are used
205 * to control io request build to io request start operations. The sequence
206 * value is recorded into an io request when it is built and is checked on
207 * the io request start operation to make sure that there was not a device
208 * hot plug between the build and start operation.
210 u8 remote_device_sequence
[SCI_MAX_REMOTE_DEVICES
];
213 * This field is a pointer to the memory allocated by the driver for the task
214 * context table. This data is shared between the hardware and software.
216 struct scu_task_context
*task_context_table
;
219 * This field is a pointer to the memory allocated by the driver for the
220 * remote node context table. This table is shared between the hardware and
223 union scu_remote_node_context
*remote_node_context_table
;
226 * This field is a pointer to the completion queue. This memory is
227 * written to by the hardware and read by the software.
229 u32
*completion_queue
;
232 * This field is the software copy of the completion queue get pointer. The
233 * controller object writes this value to the hardware after processing the
234 * completion entries.
236 u32 completion_queue_get
;
239 * This field is the minimum of the number of hardware supported port entries
240 * and the software requested port entries.
242 u32 logical_port_entries
;
245 * This field is the minimum number of hardware supported completion queue
246 * entries and the software requested completion queue entries.
248 u32 completion_queue_entries
;
251 * This field is the minimum number of hardware supported event entries and
252 * the software requested event entries.
254 u32 completion_event_entries
;
257 * This field is the minimum number of devices supported by the hardware and
258 * the number of devices requested by the software.
260 u32 remote_node_entries
;
263 * This field is the minimum number of IO requests supported by the hardware
264 * and the number of IO requests requested by the software.
266 u32 task_context_entries
;
269 * This object contains all of the unsolicited frame specific
270 * data utilized by the core controller.
272 struct scic_sds_unsolicited_frame_control uf_control
;
274 /* Phy Startup Data */
276 * This field is the driver timer handle for controller phy request startup.
277 * On controller start the controller will start each PHY individually in
278 * order of phy index.
280 void *phy_startup_timer
;
283 * This field is set when the phy_startup_timer is running and is cleared when
284 * the phy_startup_timer is stopped.
286 bool phy_startup_timer_pending
;
289 * This field is the index of the next phy start. It is initialized to 0 and
290 * increments for each phy index that is started.
292 u32 next_phy_to_start
;
295 * This field controlls the invalid link up notifications to the SCI_USER. If
296 * an invalid_link_up notification is reported a bit for the PHY index is set
297 * so further notifications are not made. Once the PHY object reports link up
298 * and is made part of a port then this bit for the PHY index is cleared.
303 * This field saves the current interrupt coalescing number of the controller.
305 u16 interrupt_coalesce_number
;
308 * This field saves the current interrupt coalescing timeout value in microseconds.
310 u32 interrupt_coalesce_timeout
;
313 * This field is a pointer to the memory mapped register space for the
314 * struct smu_registers.
316 struct smu_registers __iomem
*smu_registers
;
319 * This field is a pointer to the memory mapped register space for the
320 * struct scu_registers.
322 struct scu_registers __iomem
*scu_registers
;
327 struct scic_sds_controller sci
;
328 union scic_oem_parameters oem_parameters
;
330 int id
; /* unique within a given pci device */
331 struct list_head timers
;
332 void *core_ctrl_memory
;
333 struct dma_pool
*dma_pool
;
334 struct isci_phy phys
[SCI_MAX_PHYS
];
335 struct isci_port ports
[SCI_MAX_PORTS
+ 1]; /* includes dummy port */
336 struct sas_ha_struct sas_ha
;
339 spinlock_t queue_lock
;
340 spinlock_t state_lock
;
342 struct pci_dev
*pdev
;
344 enum isci_status status
;
345 #define IHOST_START_PENDING 0
346 #define IHOST_STOP_PENDING 1
348 wait_queue_head_t eventq
;
349 struct Scsi_Host
*shost
;
350 struct tasklet_struct completion_tasklet
;
351 struct list_head requests_to_complete
;
352 struct list_head requests_to_errorback
;
353 spinlock_t scic_lock
;
355 struct isci_remote_device devices
[SCI_MAX_REMOTE_DEVICES
];
359 * enum scic_sds_controller_states - This enumeration depicts all the states
360 * for the common controller state machine.
362 enum scic_sds_controller_states
{
364 * Simply the initial state for the base controller state machine.
366 SCI_BASE_CONTROLLER_STATE_INITIAL
= 0,
369 * This state indicates that the controller is reset. The memory for
370 * the controller is in it's initial state, but the controller requires
372 * This state is entered from the INITIAL state.
373 * This state is entered from the RESETTING state.
375 SCI_BASE_CONTROLLER_STATE_RESET
,
378 * This state is typically an action state that indicates the controller
379 * is in the process of initialization. In this state no new IO operations
381 * This state is entered from the RESET state.
383 SCI_BASE_CONTROLLER_STATE_INITIALIZING
,
386 * This state indicates that the controller has been successfully
387 * initialized. In this state no new IO operations are permitted.
388 * This state is entered from the INITIALIZING state.
390 SCI_BASE_CONTROLLER_STATE_INITIALIZED
,
393 * This state indicates the the controller is in the process of becoming
394 * ready (i.e. starting). In this state no new IO operations are permitted.
395 * This state is entered from the INITIALIZED state.
397 SCI_BASE_CONTROLLER_STATE_STARTING
,
400 * This state indicates the controller is now ready. Thus, the user
401 * is able to perform IO operations on the controller.
402 * This state is entered from the STARTING state.
404 SCI_BASE_CONTROLLER_STATE_READY
,
407 * This state is typically an action state that indicates the controller
408 * is in the process of resetting. Thus, the user is unable to perform
409 * IO operations on the controller. A reset is considered destructive in
411 * This state is entered from the READY state.
412 * This state is entered from the FAILED state.
413 * This state is entered from the STOPPED state.
415 SCI_BASE_CONTROLLER_STATE_RESETTING
,
418 * This state indicates that the controller is in the process of stopping.
419 * In this state no new IO operations are permitted, but existing IO
420 * operations are allowed to complete.
421 * This state is entered from the READY state.
423 SCI_BASE_CONTROLLER_STATE_STOPPING
,
426 * This state indicates that the controller has successfully been stopped.
427 * In this state no new IO operations are permitted.
428 * This state is entered from the STOPPING state.
430 SCI_BASE_CONTROLLER_STATE_STOPPED
,
433 * This state indicates that the controller could not successfully be
434 * initialized. In this state no new IO operations are permitted.
435 * This state is entered from the INITIALIZING state.
436 * This state is entered from the STARTING state.
437 * This state is entered from the STOPPING state.
438 * This state is entered from the RESETTING state.
440 SCI_BASE_CONTROLLER_STATE_FAILED
,
442 SCI_BASE_CONTROLLER_MAX_STATES
449 * struct isci_pci_info - This class represents the pci function containing the
450 * controllers. Depending on PCI SKU, there could be up to 2 controllers in
453 #define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS)
455 struct isci_pci_info
{
456 struct msix_entry msix_entries
[SCI_MAX_MSIX_INT
];
457 struct isci_host
*hosts
[SCI_MAX_CONTROLLERS
];
458 struct isci_orom
*orom
;
461 static inline struct isci_pci_info
*to_pci_info(struct pci_dev
*pdev
)
463 return pci_get_drvdata(pdev
);
466 #define for_each_isci_host(id, ihost, pdev) \
467 for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \
468 id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
469 ihost = to_pci_info(pdev)->hosts[++id])
471 static inline enum isci_status
isci_host_get_state(struct isci_host
*isci_host
)
473 return isci_host
->status
;
476 static inline void isci_host_change_state(struct isci_host
*isci_host
,
477 enum isci_status status
)
481 dev_dbg(&isci_host
->pdev
->dev
,
482 "%s: isci_host = %p, state = 0x%x",
486 spin_lock_irqsave(&isci_host
->state_lock
, flags
);
487 isci_host
->status
= status
;
488 spin_unlock_irqrestore(&isci_host
->state_lock
, flags
);
492 static inline int isci_host_can_queue(struct isci_host
*isci_host
, int num
)
497 spin_lock_irqsave(&isci_host
->queue_lock
, flags
);
498 if ((isci_host
->can_queue
- num
) < 0) {
499 dev_dbg(&isci_host
->pdev
->dev
,
500 "%s: isci_host->can_queue = %d\n",
502 isci_host
->can_queue
);
503 ret
= -SAS_QUEUE_FULL
;
506 isci_host
->can_queue
-= num
;
508 spin_unlock_irqrestore(&isci_host
->queue_lock
, flags
);
513 static inline void isci_host_can_dequeue(struct isci_host
*isci_host
, int num
)
517 spin_lock_irqsave(&isci_host
->queue_lock
, flags
);
518 isci_host
->can_queue
+= num
;
519 spin_unlock_irqrestore(&isci_host
->queue_lock
, flags
);
522 static inline void wait_for_start(struct isci_host
*ihost
)
524 wait_event(ihost
->eventq
, !test_bit(IHOST_START_PENDING
, &ihost
->flags
));
527 static inline void wait_for_stop(struct isci_host
*ihost
)
529 wait_event(ihost
->eventq
, !test_bit(IHOST_STOP_PENDING
, &ihost
->flags
));
532 static inline void wait_for_device_start(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
534 wait_event(ihost
->eventq
, !test_bit(IDEV_START_PENDING
, &idev
->flags
));
537 static inline void wait_for_device_stop(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
539 wait_event(ihost
->eventq
, !test_bit(IDEV_STOP_PENDING
, &idev
->flags
));
542 static inline struct isci_host
*dev_to_ihost(struct domain_device
*dev
)
544 return dev
->port
->ha
->lldd_ha
;
547 static inline struct isci_host
*scic_to_ihost(struct scic_sds_controller
*scic
)
549 /* XXX delete after merging scic_sds_contoller and isci_host */
550 struct isci_host
*ihost
= container_of(scic
, typeof(*ihost
), sci
);
556 * INCREMENT_QUEUE_GET() -
558 * This macro will increment the specified index to and if the index wraps to 0
559 * it will toggel the cycle bit.
561 #define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
563 if ((index) + 1 == entry_count) { \
565 (cycle) = (cycle) ^ (bit_toggle); \
572 * scic_sds_controller_get_protocol_engine_group() -
574 * This macro returns the protocol engine group for this controller object.
575 * Presently we only support protocol engine group 0 so just return that
577 #define scic_sds_controller_get_protocol_engine_group(controller) 0
580 * scic_sds_io_tag_construct() -
582 * This macro constructs an IO tag from the sequence and index values.
584 #define scic_sds_io_tag_construct(sequence, task_index) \
585 ((sequence) << 12 | (task_index))
588 * scic_sds_io_tag_get_sequence() -
590 * This macro returns the IO sequence from the IO tag value.
592 #define scic_sds_io_tag_get_sequence(io_tag) \
593 (((io_tag) & 0xF000) >> 12)
596 * scic_sds_io_tag_get_index() -
598 * This macro returns the TCi from the io tag value
600 #define scic_sds_io_tag_get_index(io_tag) \
604 * scic_sds_io_sequence_increment() -
606 * This is a helper macro to increment the io sequence count. We may find in
607 * the future that it will be faster to store the sequence count in such a way
608 * as we dont perform the shift operation to build io tag values so therefore
609 * need a way to incrment them correctly
611 #define scic_sds_io_sequence_increment(value) \
612 ((value) = (((value) + 1) & 0x000F))
614 /* expander attached sata devices require 3 rnc slots */
615 static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device
*sci_dev
)
617 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
619 if ((dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_STP
)) &&
620 !sci_dev
->is_direct_attached
)
621 return SCU_STP_REMOTE_NODE_COUNT
;
622 return SCU_SSP_REMOTE_NODE_COUNT
;
626 * scic_sds_controller_set_invalid_phy() -
628 * This macro will set the bit in the invalid phy mask for this controller
629 * object. This is used to control messages reported for invalid link up
632 #define scic_sds_controller_set_invalid_phy(controller, phy) \
633 ((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
636 * scic_sds_controller_clear_invalid_phy() -
638 * This macro will clear the bit in the invalid phy mask for this controller
639 * object. This is used to control messages reported for invalid link up
642 #define scic_sds_controller_clear_invalid_phy(controller, phy) \
643 ((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
645 static inline struct device
*scic_to_dev(struct scic_sds_controller
*scic
)
647 return &scic_to_ihost(scic
)->pdev
->dev
;
650 static inline struct device
*sciphy_to_dev(struct scic_sds_phy
*sci_phy
)
652 struct isci_phy
*iphy
= sci_phy_to_iphy(sci_phy
);
654 if (!iphy
|| !iphy
->isci_port
|| !iphy
->isci_port
->isci_host
)
657 return &iphy
->isci_port
->isci_host
->pdev
->dev
;
660 static inline struct device
*sciport_to_dev(struct scic_sds_port
*sci_port
)
662 struct isci_port
*iport
= sci_port_to_iport(sci_port
);
664 if (!iport
|| !iport
->isci_host
)
667 return &iport
->isci_host
->pdev
->dev
;
670 static inline struct device
*scirdev_to_dev(struct scic_sds_remote_device
*sci_dev
)
672 struct isci_remote_device
*idev
=
673 container_of(sci_dev
, typeof(*idev
), sci
);
675 if (!idev
|| !idev
->isci_port
|| !idev
->isci_port
->isci_host
)
678 return &idev
->isci_port
->isci_host
->pdev
->dev
;
687 extern int isci_si_rev
;
689 static inline bool is_a0(void)
691 return isci_si_rev
== ISCI_SI_REVA0
;
694 static inline bool is_a2(void)
696 return isci_si_rev
== ISCI_SI_REVA2
;
699 static inline bool is_b0(void)
701 return isci_si_rev
> ISCI_SI_REVA2
;
704 void scic_sds_controller_post_request(struct scic_sds_controller
*scic
,
706 void scic_sds_controller_release_frame(struct scic_sds_controller
*scic
,
708 void scic_sds_controller_copy_sata_response(void *response_buffer
,
711 enum sci_status
scic_sds_controller_allocate_remote_node_context(struct scic_sds_controller
*scic
,
712 struct scic_sds_remote_device
*sci_dev
,
714 void scic_sds_controller_free_remote_node_context(
715 struct scic_sds_controller
*scic
,
716 struct scic_sds_remote_device
*sci_dev
,
718 union scu_remote_node_context
*scic_sds_controller_get_remote_node_context_buffer(
719 struct scic_sds_controller
*scic
,
722 struct scic_sds_request
*scic_request_by_tag(struct scic_sds_controller
*scic
,
725 struct scu_task_context
*scic_sds_controller_get_task_context_buffer(
726 struct scic_sds_controller
*scic
,
729 void scic_sds_controller_power_control_queue_insert(
730 struct scic_sds_controller
*scic
,
731 struct scic_sds_phy
*sci_phy
);
733 void scic_sds_controller_power_control_queue_remove(
734 struct scic_sds_controller
*scic
,
735 struct scic_sds_phy
*sci_phy
);
737 void scic_sds_controller_link_up(
738 struct scic_sds_controller
*scic
,
739 struct scic_sds_port
*sci_port
,
740 struct scic_sds_phy
*sci_phy
);
742 void scic_sds_controller_link_down(
743 struct scic_sds_controller
*scic
,
744 struct scic_sds_port
*sci_port
,
745 struct scic_sds_phy
*sci_phy
);
747 void scic_sds_controller_remote_device_stopped(
748 struct scic_sds_controller
*scic
,
749 struct scic_sds_remote_device
*sci_dev
);
751 void scic_sds_controller_copy_task_context(
752 struct scic_sds_controller
*scic
,
753 struct scic_sds_request
*this_request
);
755 void scic_sds_controller_register_setup(struct scic_sds_controller
*scic
);
757 enum sci_status
scic_controller_continue_io(struct scic_sds_request
*sci_req
);
758 int isci_host_scan_finished(struct Scsi_Host
*, unsigned long);
759 void isci_host_scan_start(struct Scsi_Host
*);
761 int isci_host_init(struct isci_host
*);
763 void isci_host_init_controller_names(
764 struct isci_host
*isci_host
,
765 unsigned int controller_idx
);
767 void isci_host_deinit(
770 void isci_host_port_link_up(
772 struct scic_sds_port
*,
773 struct scic_sds_phy
*);
774 int isci_host_dev_found(struct domain_device
*);
776 void isci_host_remote_device_start_complete(
778 struct isci_remote_device
*,
781 void scic_controller_disable_interrupts(
782 struct scic_sds_controller
*scic
);
784 enum sci_status
scic_controller_start_io(
785 struct scic_sds_controller
*scic
,
786 struct scic_sds_remote_device
*remote_device
,
787 struct scic_sds_request
*io_request
,
790 enum sci_task_status
scic_controller_start_task(
791 struct scic_sds_controller
*scic
,
792 struct scic_sds_remote_device
*remote_device
,
793 struct scic_sds_request
*task_request
,
796 enum sci_status
scic_controller_terminate_request(
797 struct scic_sds_controller
*scic
,
798 struct scic_sds_remote_device
*remote_device
,
799 struct scic_sds_request
*request
);
801 enum sci_status
scic_controller_complete_io(
802 struct scic_sds_controller
*scic
,
803 struct scic_sds_remote_device
*remote_device
,
804 struct scic_sds_request
*io_request
);
806 u16
scic_controller_allocate_io_tag(
807 struct scic_sds_controller
*scic
);
809 enum sci_status
scic_controller_free_io_tag(
810 struct scic_sds_controller
*scic
,
813 void scic_sds_port_configuration_agent_construct(
814 struct scic_sds_port_configuration_agent
*port_agent
);
816 enum sci_status
scic_sds_port_configuration_agent_initialize(
817 struct scic_sds_controller
*controller
,
818 struct scic_sds_port_configuration_agent
*port_agent
);