2 * This file is provided under a dual BSD/GPLv2 license. When using or
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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.
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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.
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30 * modification, are permitted provided that the following conditions
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
61 #define SCU_DUMMY_INDEX (0xFFFF)
63 static void isci_port_change_state(struct isci_port
*iport
, enum isci_status status
)
67 dev_dbg(&iport
->isci_host
->pdev
->dev
,
68 "%s: iport = %p, state = 0x%x\n",
69 __func__
, iport
, status
);
71 /* XXX pointless lock */
72 spin_lock_irqsave(&iport
->state_lock
, flags
);
73 iport
->status
= status
;
74 spin_unlock_irqrestore(&iport
->state_lock
, flags
);
77 static void sci_port_get_protocols(struct isci_port
*iport
, struct sci_phy_proto
*proto
)
82 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
83 struct isci_phy
*iphy
= iport
->phy_table
[index
];
87 sci_phy_get_protocols(iphy
, proto
);
91 static u32
sci_port_get_phys(struct isci_port
*iport
)
97 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
98 if (iport
->phy_table
[index
])
105 * sci_port_get_properties() - This method simply returns the properties
106 * regarding the port, such as: physical index, protocols, sas address, etc.
107 * @port: this parameter specifies the port for which to retrieve the physical
109 * @properties: This parameter specifies the properties structure into which to
110 * copy the requested information.
112 * Indicate if the user specified a valid port. SCI_SUCCESS This value is
113 * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
114 * value is returned if the specified port is not valid. When this value is
115 * returned, no data is copied to the properties output parameter.
117 enum sci_status
sci_port_get_properties(struct isci_port
*iport
,
118 struct sci_port_properties
*prop
)
120 if (!iport
|| iport
->logical_port_index
== SCIC_SDS_DUMMY_PORT
)
121 return SCI_FAILURE_INVALID_PORT
;
123 prop
->index
= iport
->logical_port_index
;
124 prop
->phy_mask
= sci_port_get_phys(iport
);
125 sci_port_get_sas_address(iport
, &prop
->local
.sas_address
);
126 sci_port_get_protocols(iport
, &prop
->local
.protocols
);
127 sci_port_get_attached_sas_address(iport
, &prop
->remote
.sas_address
);
132 static void sci_port_bcn_enable(struct isci_port
*iport
)
134 struct isci_phy
*iphy
;
138 for (i
= 0; i
< ARRAY_SIZE(iport
->phy_table
); i
++) {
139 iphy
= iport
->phy_table
[i
];
142 val
= readl(&iphy
->link_layer_registers
->link_layer_control
);
143 /* clear the bit by writing 1. */
144 writel(val
, &iphy
->link_layer_registers
->link_layer_control
);
148 static void isci_port_bc_change_received(struct isci_host
*ihost
,
149 struct isci_port
*iport
,
150 struct isci_phy
*iphy
)
152 dev_dbg(&ihost
->pdev
->dev
,
153 "%s: isci_phy = %p, sas_phy = %p\n",
154 __func__
, iphy
, &iphy
->sas_phy
);
156 ihost
->sas_ha
.notify_port_event(&iphy
->sas_phy
, PORTE_BROADCAST_RCVD
);
157 sci_port_bcn_enable(iport
);
160 static void isci_port_link_up(struct isci_host
*isci_host
,
161 struct isci_port
*iport
,
162 struct isci_phy
*iphy
)
165 struct sci_port_properties properties
;
166 unsigned long success
= true;
168 BUG_ON(iphy
->isci_port
!= NULL
);
170 iphy
->isci_port
= iport
;
172 dev_dbg(&isci_host
->pdev
->dev
,
173 "%s: isci_port = %p\n",
176 spin_lock_irqsave(&iphy
->sas_phy
.frame_rcvd_lock
, flags
);
178 isci_port_change_state(iphy
->isci_port
, isci_starting
);
180 sci_port_get_properties(iport
, &properties
);
182 if (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
) {
183 u64 attached_sas_address
;
185 iphy
->sas_phy
.oob_mode
= SATA_OOB_MODE
;
186 iphy
->sas_phy
.frame_rcvd_size
= sizeof(struct dev_to_host_fis
);
189 * For direct-attached SATA devices, the SCI core will
190 * automagically assign a SAS address to the end device
191 * for the purpose of creating a port. This SAS address
192 * will not be the same as assigned to the PHY and needs
193 * to be obtained from struct sci_port_properties properties.
195 attached_sas_address
= properties
.remote
.sas_address
.high
;
196 attached_sas_address
<<= 32;
197 attached_sas_address
|= properties
.remote
.sas_address
.low
;
198 swab64s(&attached_sas_address
);
200 memcpy(&iphy
->sas_phy
.attached_sas_addr
,
201 &attached_sas_address
, sizeof(attached_sas_address
));
202 } else if (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SAS
) {
203 iphy
->sas_phy
.oob_mode
= SAS_OOB_MODE
;
204 iphy
->sas_phy
.frame_rcvd_size
= sizeof(struct sas_identify_frame
);
206 /* Copy the attached SAS address from the IAF */
207 memcpy(iphy
->sas_phy
.attached_sas_addr
,
208 iphy
->frame_rcvd
.iaf
.sas_addr
, SAS_ADDR_SIZE
);
210 dev_err(&isci_host
->pdev
->dev
, "%s: unkown target\n", __func__
);
214 iphy
->sas_phy
.phy
->negotiated_linkrate
= sci_phy_linkrate(iphy
);
216 spin_unlock_irqrestore(&iphy
->sas_phy
.frame_rcvd_lock
, flags
);
218 /* Notify libsas that we have an address frame, if indeed
219 * we've found an SSP, SMP, or STP target */
221 isci_host
->sas_ha
.notify_port_event(&iphy
->sas_phy
,
227 * isci_port_link_down() - This function is called by the sci core when a link
229 * @isci_host: This parameter specifies the isci host object.
230 * @phy: This parameter specifies the isci phy with the active link.
231 * @port: This parameter specifies the isci port with the active link.
234 static void isci_port_link_down(struct isci_host
*isci_host
,
235 struct isci_phy
*isci_phy
,
236 struct isci_port
*isci_port
)
238 struct isci_remote_device
*isci_device
;
240 dev_dbg(&isci_host
->pdev
->dev
,
241 "%s: isci_port = %p\n", __func__
, isci_port
);
245 /* check to see if this is the last phy on this port. */
246 if (isci_phy
->sas_phy
.port
&&
247 isci_phy
->sas_phy
.port
->num_phys
== 1) {
248 /* change the state for all devices on this port. The
249 * next task sent to this device will be returned as
250 * SAS_TASK_UNDELIVERED, and the scsi mid layer will
253 list_for_each_entry(isci_device
,
254 &isci_port
->remote_dev_list
,
256 dev_dbg(&isci_host
->pdev
->dev
,
257 "%s: isci_device = %p\n",
258 __func__
, isci_device
);
259 set_bit(IDEV_GONE
, &isci_device
->flags
);
261 isci_port_change_state(isci_port
, isci_stopping
);
265 /* Notify libsas of the borken link, this will trigger calls to our
266 * isci_port_deformed and isci_dev_gone functions.
268 sas_phy_disconnected(&isci_phy
->sas_phy
);
269 isci_host
->sas_ha
.notify_phy_event(&isci_phy
->sas_phy
,
270 PHYE_LOSS_OF_SIGNAL
);
272 isci_phy
->isci_port
= NULL
;
274 dev_dbg(&isci_host
->pdev
->dev
,
275 "%s: isci_port = %p - Done\n", __func__
, isci_port
);
280 * isci_port_ready() - This function is called by the sci core when a link
282 * @isci_host: This parameter specifies the isci host object.
283 * @port: This parameter specifies the sci port with the active link.
286 static void isci_port_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
288 dev_dbg(&isci_host
->pdev
->dev
,
289 "%s: isci_port = %p\n", __func__
, isci_port
);
291 complete_all(&isci_port
->start_complete
);
292 isci_port_change_state(isci_port
, isci_ready
);
297 * isci_port_not_ready() - This function is called by the sci core when a link
298 * is not ready. All remote devices on this link will be removed if they are
299 * in the stopping state.
300 * @isci_host: This parameter specifies the isci host object.
301 * @port: This parameter specifies the sci port with the active link.
304 static void isci_port_not_ready(struct isci_host
*isci_host
, struct isci_port
*isci_port
)
306 dev_dbg(&isci_host
->pdev
->dev
,
307 "%s: isci_port = %p\n", __func__
, isci_port
);
310 static void isci_port_stop_complete(struct isci_host
*ihost
,
311 struct isci_port
*iport
,
312 enum sci_status completion_status
)
314 dev_dbg(&ihost
->pdev
->dev
, "Port stop complete\n");
318 static bool is_port_ready_state(enum sci_port_states state
)
322 case SCI_PORT_SUB_WAITING
:
323 case SCI_PORT_SUB_OPERATIONAL
:
324 case SCI_PORT_SUB_CONFIGURING
:
331 /* flag dummy rnc hanling when exiting a ready state */
332 static void port_state_machine_change(struct isci_port
*iport
,
333 enum sci_port_states state
)
335 struct sci_base_state_machine
*sm
= &iport
->sm
;
336 enum sci_port_states old_state
= sm
->current_state_id
;
338 if (is_port_ready_state(old_state
) && !is_port_ready_state(state
))
339 iport
->ready_exit
= true;
341 sci_change_state(sm
, state
);
342 iport
->ready_exit
= false;
346 * isci_port_hard_reset_complete() - This function is called by the sci core
347 * when the hard reset complete notification has been received.
348 * @port: This parameter specifies the sci port with the active link.
349 * @completion_status: This parameter specifies the core status for the reset
353 static void isci_port_hard_reset_complete(struct isci_port
*isci_port
,
354 enum sci_status completion_status
)
356 dev_dbg(&isci_port
->isci_host
->pdev
->dev
,
357 "%s: isci_port = %p, completion_status=%x\n",
358 __func__
, isci_port
, completion_status
);
360 /* Save the status of the hard reset from the port. */
361 isci_port
->hard_reset_status
= completion_status
;
363 if (completion_status
!= SCI_SUCCESS
) {
365 /* The reset failed. The port state is now SCI_PORT_FAILED. */
366 if (isci_port
->active_phy_mask
== 0) {
368 /* Generate the link down now to the host, since it
369 * was intercepted by the hard reset state machine when
370 * it really happened.
372 isci_port_link_down(isci_port
->isci_host
,
373 &isci_port
->isci_host
->phys
[
374 isci_port
->last_active_phy
],
377 /* Advance the port state so that link state changes will be
380 port_state_machine_change(isci_port
, SCI_PORT_SUB_WAITING
);
383 complete_all(&isci_port
->hard_reset_complete
);
386 /* This method will return a true value if the specified phy can be assigned to
387 * this port The following is a list of phys for each port that are allowed: -
388 * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
389 * doesn't preclude all configurations. It merely ensures that a phy is part
390 * of the allowable set of phy identifiers for that port. For example, one
391 * could assign phy 3 to port 0 and no other phys. Please refer to
392 * sci_port_is_phy_mask_valid() for information regarding whether the
393 * phy_mask for a port can be supported. bool true if this is a valid phy
394 * assignment for the port false if this is not a valid phy assignment for the
397 bool sci_port_is_valid_phy_assignment(struct isci_port
*iport
, u32 phy_index
)
399 struct isci_host
*ihost
= iport
->owning_controller
;
400 struct sci_user_parameters
*user
= &ihost
->user_parameters
;
402 /* Initialize to invalid value. */
403 u32 existing_phy_index
= SCI_MAX_PHYS
;
406 if ((iport
->physical_port_index
== 1) && (phy_index
!= 1))
409 if (iport
->physical_port_index
== 3 && phy_index
!= 3)
412 if (iport
->physical_port_index
== 2 &&
413 (phy_index
== 0 || phy_index
== 1))
416 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
417 if (iport
->phy_table
[index
] && index
!= phy_index
)
418 existing_phy_index
= index
;
420 /* Ensure that all of the phys in the port are capable of
421 * operating at the same maximum link rate.
423 if (existing_phy_index
< SCI_MAX_PHYS
&&
424 user
->phys
[phy_index
].max_speed_generation
!=
425 user
->phys
[existing_phy_index
].max_speed_generation
)
433 * @sci_port: This is the port object for which to determine if the phy mask
436 * This method will return a true value if the port's phy mask can be supported
437 * by the SCU. The following is a list of valid PHY mask configurations for
438 * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
439 * - Port 3 - [3] This method returns a boolean indication specifying if the
440 * phy mask can be supported. true if this is a valid phy assignment for the
441 * port false if this is not a valid phy assignment for the port
443 static bool sci_port_is_phy_mask_valid(
444 struct isci_port
*iport
,
447 if (iport
->physical_port_index
== 0) {
448 if (((phy_mask
& 0x0F) == 0x0F)
449 || ((phy_mask
& 0x03) == 0x03)
450 || ((phy_mask
& 0x01) == 0x01)
453 } else if (iport
->physical_port_index
== 1) {
454 if (((phy_mask
& 0x02) == 0x02)
457 } else if (iport
->physical_port_index
== 2) {
458 if (((phy_mask
& 0x0C) == 0x0C)
459 || ((phy_mask
& 0x04) == 0x04)
462 } else if (iport
->physical_port_index
== 3) {
463 if (((phy_mask
& 0x08) == 0x08)
472 * This method retrieves a currently active (i.e. connected) phy contained in
473 * the port. Currently, the lowest order phy that is connected is returned.
474 * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
475 * returned if there are no currently active (i.e. connected to a remote end
476 * point) phys contained in the port. All other values specify a struct sci_phy
477 * object that is active in the port.
479 static struct isci_phy
*sci_port_get_a_connected_phy(struct isci_port
*iport
)
482 struct isci_phy
*iphy
;
484 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
485 /* Ensure that the phy is both part of the port and currently
486 * connected to the remote end-point.
488 iphy
= iport
->phy_table
[index
];
489 if (iphy
&& sci_port_active_phy(iport
, iphy
))
496 static enum sci_status
sci_port_set_phy(struct isci_port
*iport
, struct isci_phy
*iphy
)
498 /* Check to see if we can add this phy to a port
499 * that means that the phy is not part of a port and that the port does
500 * not already have a phy assinged to the phy index.
502 if (!iport
->phy_table
[iphy
->phy_index
] &&
503 !phy_get_non_dummy_port(iphy
) &&
504 sci_port_is_valid_phy_assignment(iport
, iphy
->phy_index
)) {
505 /* Phy is being added in the stopped state so we are in MPC mode
506 * make logical port index = physical port index
508 iport
->logical_port_index
= iport
->physical_port_index
;
509 iport
->phy_table
[iphy
->phy_index
] = iphy
;
510 sci_phy_set_port(iphy
, iport
);
518 static enum sci_status
sci_port_clear_phy(struct isci_port
*iport
, struct isci_phy
*iphy
)
520 /* Make sure that this phy is part of this port */
521 if (iport
->phy_table
[iphy
->phy_index
] == iphy
&&
522 phy_get_non_dummy_port(iphy
) == iport
) {
523 struct isci_host
*ihost
= iport
->owning_controller
;
525 /* Yep it is assigned to this port so remove it */
526 sci_phy_set_port(iphy
, &ihost
->ports
[SCI_MAX_PORTS
]);
527 iport
->phy_table
[iphy
->phy_index
] = NULL
;
534 void sci_port_get_sas_address(struct isci_port
*iport
, struct sci_sas_address
*sas
)
540 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
541 if (iport
->phy_table
[index
])
542 sci_phy_get_sas_address(iport
->phy_table
[index
], sas
);
545 void sci_port_get_attached_sas_address(struct isci_port
*iport
, struct sci_sas_address
*sas
)
547 struct isci_phy
*iphy
;
550 * Ensure that the phy is both part of the port and currently
551 * connected to the remote end-point.
553 iphy
= sci_port_get_a_connected_phy(iport
);
555 if (iphy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
) {
556 sci_phy_get_attached_sas_address(iphy
, sas
);
558 sci_phy_get_sas_address(iphy
, sas
);
559 sas
->low
+= iphy
->phy_index
;
568 * sci_port_construct_dummy_rnc() - create dummy rnc for si workaround
570 * @sci_port: logical port on which we need to create the remote node context
571 * @rni: remote node index for this remote node context.
573 * This routine will construct a dummy remote node context data structure
574 * This structure will be posted to the hardware to work around a scheduler
575 * error in the hardware.
577 static void sci_port_construct_dummy_rnc(struct isci_port
*iport
, u16 rni
)
579 union scu_remote_node_context
*rnc
;
581 rnc
= &iport
->owning_controller
->remote_node_context_table
[rni
];
583 memset(rnc
, 0, sizeof(union scu_remote_node_context
));
585 rnc
->ssp
.remote_sas_address_hi
= 0;
586 rnc
->ssp
.remote_sas_address_lo
= 0;
588 rnc
->ssp
.remote_node_index
= rni
;
589 rnc
->ssp
.remote_node_port_width
= 1;
590 rnc
->ssp
.logical_port_index
= iport
->physical_port_index
;
592 rnc
->ssp
.nexus_loss_timer_enable
= false;
593 rnc
->ssp
.check_bit
= false;
594 rnc
->ssp
.is_valid
= true;
595 rnc
->ssp
.is_remote_node_context
= true;
596 rnc
->ssp
.function_number
= 0;
597 rnc
->ssp
.arbitration_wait_time
= 0;
601 * construct a dummy task context data structure. This
602 * structure will be posted to the hardwre to work around a scheduler error
605 static void sci_port_construct_dummy_task(struct isci_port
*iport
, u16 tag
)
607 struct isci_host
*ihost
= iport
->owning_controller
;
608 struct scu_task_context
*task_context
;
610 task_context
= &ihost
->task_context_table
[ISCI_TAG_TCI(tag
)];
611 memset(task_context
, 0, sizeof(struct scu_task_context
));
613 task_context
->initiator_request
= 1;
614 task_context
->connection_rate
= 1;
615 task_context
->logical_port_index
= iport
->physical_port_index
;
616 task_context
->protocol_type
= SCU_TASK_CONTEXT_PROTOCOL_SSP
;
617 task_context
->task_index
= ISCI_TAG_TCI(tag
);
618 task_context
->valid
= SCU_TASK_CONTEXT_VALID
;
619 task_context
->context_type
= SCU_TASK_CONTEXT_TYPE
;
620 task_context
->remote_node_index
= iport
->reserved_rni
;
621 task_context
->do_not_dma_ssp_good_response
= 1;
622 task_context
->task_phase
= 0x01;
625 static void sci_port_destroy_dummy_resources(struct isci_port
*iport
)
627 struct isci_host
*ihost
= iport
->owning_controller
;
629 if (iport
->reserved_tag
!= SCI_CONTROLLER_INVALID_IO_TAG
)
630 isci_free_tag(ihost
, iport
->reserved_tag
);
632 if (iport
->reserved_rni
!= SCU_DUMMY_INDEX
)
633 sci_remote_node_table_release_remote_node_index(&ihost
->available_remote_nodes
,
634 1, iport
->reserved_rni
);
636 iport
->reserved_rni
= SCU_DUMMY_INDEX
;
637 iport
->reserved_tag
= SCI_CONTROLLER_INVALID_IO_TAG
;
640 void sci_port_setup_transports(struct isci_port
*iport
, u32 device_id
)
644 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
645 if (iport
->active_phy_mask
& (1 << index
))
646 sci_phy_setup_transport(iport
->phy_table
[index
], device_id
);
650 static void sci_port_resume_phy(struct isci_port
*iport
, struct isci_phy
*iphy
)
652 sci_phy_resume(iphy
);
653 iport
->enabled_phy_mask
|= 1 << iphy
->phy_index
;
656 static void sci_port_activate_phy(struct isci_port
*iport
,
657 struct isci_phy
*iphy
,
660 struct isci_host
*ihost
= iport
->owning_controller
;
662 if (iphy
->protocol
!= SCIC_SDS_PHY_PROTOCOL_SATA
&& (flags
& PF_RESUME
))
663 sci_phy_resume(iphy
);
665 iport
->active_phy_mask
|= 1 << iphy
->phy_index
;
667 sci_controller_clear_invalid_phy(ihost
, iphy
);
669 if (flags
& PF_NOTIFY
)
670 isci_port_link_up(ihost
, iport
, iphy
);
673 void sci_port_deactivate_phy(struct isci_port
*iport
, struct isci_phy
*iphy
,
676 struct isci_host
*ihost
= iport
->owning_controller
;
678 iport
->active_phy_mask
&= ~(1 << iphy
->phy_index
);
679 iport
->enabled_phy_mask
&= ~(1 << iphy
->phy_index
);
680 if (!iport
->active_phy_mask
)
681 iport
->last_active_phy
= iphy
->phy_index
;
683 iphy
->max_negotiated_speed
= SAS_LINK_RATE_UNKNOWN
;
685 /* Re-assign the phy back to the LP as if it were a narrow port for APC
686 * mode. For MPC mode, the phy will remain in the port.
688 if (iport
->owning_controller
->oem_parameters
.controller
.mode_type
==
689 SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE
)
690 writel(iphy
->phy_index
,
691 &iport
->port_pe_configuration_register
[iphy
->phy_index
]);
693 if (do_notify_user
== true)
694 isci_port_link_down(ihost
, iphy
, iport
);
697 static void sci_port_invalid_link_up(struct isci_port
*iport
, struct isci_phy
*iphy
)
699 struct isci_host
*ihost
= iport
->owning_controller
;
702 * Check to see if we have alreay reported this link as bad and if
703 * not go ahead and tell the SCI_USER that we have discovered an
706 if ((ihost
->invalid_phy_mask
& (1 << iphy
->phy_index
)) == 0) {
707 ihost
->invalid_phy_mask
|= 1 << iphy
->phy_index
;
708 dev_warn(&ihost
->pdev
->dev
, "Invalid link up!\n");
713 * sci_port_general_link_up_handler - phy can be assigned to port?
714 * @sci_port: sci_port object for which has a phy that has gone link up.
715 * @sci_phy: This is the struct isci_phy object that has gone link up.
716 * @flags: PF_RESUME, PF_NOTIFY to sci_port_activate_phy
718 * Determine if this phy can be assigned to this port . If the phy is
719 * not a valid PHY for this port then the function will notify the user.
720 * A PHY can only be part of a port if it's attached SAS ADDRESS is the
721 * same as all other PHYs in the same port.
723 static void sci_port_general_link_up_handler(struct isci_port
*iport
,
724 struct isci_phy
*iphy
,
727 struct sci_sas_address port_sas_address
;
728 struct sci_sas_address phy_sas_address
;
730 sci_port_get_attached_sas_address(iport
, &port_sas_address
);
731 sci_phy_get_attached_sas_address(iphy
, &phy_sas_address
);
733 /* If the SAS address of the new phy matches the SAS address of
734 * other phys in the port OR this is the first phy in the port,
735 * then activate the phy and allow it to be used for operations
738 if ((phy_sas_address
.high
== port_sas_address
.high
&&
739 phy_sas_address
.low
== port_sas_address
.low
) ||
740 iport
->active_phy_mask
== 0) {
741 struct sci_base_state_machine
*sm
= &iport
->sm
;
743 sci_port_activate_phy(iport
, iphy
, flags
);
744 if (sm
->current_state_id
== SCI_PORT_RESETTING
)
745 port_state_machine_change(iport
, SCI_PORT_READY
);
747 sci_port_invalid_link_up(iport
, iphy
);
753 * This method returns false if the port only has a single phy object assigned.
754 * If there are no phys or more than one phy then the method will return
756 * @sci_port: The port for which the wide port condition is to be checked.
758 * bool true Is returned if this is a wide ported port. false Is returned if
759 * this is a narrow port.
761 static bool sci_port_is_wide(struct isci_port
*iport
)
766 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
767 if (iport
->phy_table
[index
] != NULL
) {
772 return phy_count
!= 1;
776 * This method is called by the PHY object when the link is detected. if the
777 * port wants the PHY to continue on to the link up state then the port
778 * layer must return true. If the port object returns false the phy object
779 * must halt its attempt to go link up.
780 * @sci_port: The port associated with the phy object.
781 * @sci_phy: The phy object that is trying to go link up.
783 * true if the phy object can continue to the link up condition. true Is
784 * returned if this phy can continue to the ready state. false Is returned if
785 * can not continue on to the ready state. This notification is in place for
786 * wide ports and direct attached phys. Since there are no wide ported SATA
787 * devices this could become an invalid port configuration.
789 bool sci_port_link_detected(
790 struct isci_port
*iport
,
791 struct isci_phy
*iphy
)
793 if ((iport
->logical_port_index
!= SCIC_SDS_DUMMY_PORT
) &&
794 (iphy
->protocol
== SCIC_SDS_PHY_PROTOCOL_SATA
)) {
795 if (sci_port_is_wide(iport
)) {
796 sci_port_invalid_link_up(iport
, iphy
);
799 struct isci_host
*ihost
= iport
->owning_controller
;
800 struct isci_port
*dst_port
= &(ihost
->ports
[iphy
->phy_index
]);
801 writel(iphy
->phy_index
,
802 &dst_port
->port_pe_configuration_register
[iphy
->phy_index
]);
809 static void port_timeout(unsigned long data
)
811 struct sci_timer
*tmr
= (struct sci_timer
*)data
;
812 struct isci_port
*iport
= container_of(tmr
, typeof(*iport
), timer
);
813 struct isci_host
*ihost
= iport
->owning_controller
;
817 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
822 current_state
= iport
->sm
.current_state_id
;
824 if (current_state
== SCI_PORT_RESETTING
) {
825 /* if the port is still in the resetting state then the timeout
826 * fired before the reset completed.
828 port_state_machine_change(iport
, SCI_PORT_FAILED
);
829 } else if (current_state
== SCI_PORT_STOPPED
) {
830 /* if the port is stopped then the start request failed In this
831 * case stay in the stopped state.
833 dev_err(sciport_to_dev(iport
),
834 "%s: SCIC Port 0x%p failed to stop before tiemout.\n",
837 } else if (current_state
== SCI_PORT_STOPPING
) {
838 /* if the port is still stopping then the stop has not completed */
839 isci_port_stop_complete(iport
->owning_controller
,
841 SCI_FAILURE_TIMEOUT
);
843 /* The port is in the ready state and we have a timer
844 * reporting a timeout this should not happen.
846 dev_err(sciport_to_dev(iport
),
847 "%s: SCIC Port 0x%p is processing a timeout operation "
848 "in state %d.\n", __func__
, iport
, current_state
);
852 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
855 /* --------------------------------------------------------------------------- */
858 * This function updates the hardwares VIIT entry for this port.
862 static void sci_port_update_viit_entry(struct isci_port
*iport
)
864 struct sci_sas_address sas_address
;
866 sci_port_get_sas_address(iport
, &sas_address
);
868 writel(sas_address
.high
,
869 &iport
->viit_registers
->initiator_sas_address_hi
);
870 writel(sas_address
.low
,
871 &iport
->viit_registers
->initiator_sas_address_lo
);
873 /* This value get cleared just in case its not already cleared */
874 writel(0, &iport
->viit_registers
->reserved
);
876 /* We are required to update the status register last */
877 writel(SCU_VIIT_ENTRY_ID_VIIT
|
878 SCU_VIIT_IPPT_INITIATOR
|
879 ((1 << iport
->physical_port_index
) << SCU_VIIT_ENTRY_LPVIE_SHIFT
) |
880 SCU_VIIT_STATUS_ALL_VALID
,
881 &iport
->viit_registers
->status
);
884 enum sas_linkrate
sci_port_get_max_allowed_speed(struct isci_port
*iport
)
887 struct isci_phy
*iphy
;
888 enum sas_linkrate max_allowed_speed
= SAS_LINK_RATE_6_0_GBPS
;
891 * Loop through all of the phys in this port and find the phy with the
892 * lowest maximum link rate. */
893 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
894 iphy
= iport
->phy_table
[index
];
895 if (iphy
&& sci_port_active_phy(iport
, iphy
) &&
896 iphy
->max_negotiated_speed
< max_allowed_speed
)
897 max_allowed_speed
= iphy
->max_negotiated_speed
;
900 return max_allowed_speed
;
903 static void sci_port_suspend_port_task_scheduler(struct isci_port
*iport
)
905 u32 pts_control_value
;
907 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
908 pts_control_value
|= SCU_PTSxCR_GEN_BIT(SUSPEND
);
909 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
913 * sci_port_post_dummy_request() - post dummy/workaround request
914 * @sci_port: port to post task
916 * Prevent the hardware scheduler from posting new requests to the front
917 * of the scheduler queue causing a starvation problem for currently
921 static void sci_port_post_dummy_request(struct isci_port
*iport
)
923 struct isci_host
*ihost
= iport
->owning_controller
;
924 u16 tag
= iport
->reserved_tag
;
925 struct scu_task_context
*tc
;
928 tc
= &ihost
->task_context_table
[ISCI_TAG_TCI(tag
)];
931 command
= SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC
|
932 iport
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
935 sci_controller_post_request(ihost
, command
);
939 * This routine will abort the dummy request. This will alow the hardware to
940 * power down parts of the silicon to save power.
942 * @sci_port: The port on which the task must be aborted.
945 static void sci_port_abort_dummy_request(struct isci_port
*iport
)
947 struct isci_host
*ihost
= iport
->owning_controller
;
948 u16 tag
= iport
->reserved_tag
;
949 struct scu_task_context
*tc
;
952 tc
= &ihost
->task_context_table
[ISCI_TAG_TCI(tag
)];
955 command
= SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT
|
956 iport
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
|
959 sci_controller_post_request(ihost
, command
);
964 * @sci_port: This is the struct isci_port object to resume.
966 * This method will resume the port task scheduler for this port object. none
969 sci_port_resume_port_task_scheduler(struct isci_port
*iport
)
971 u32 pts_control_value
;
973 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
974 pts_control_value
&= ~SCU_PTSxCR_GEN_BIT(SUSPEND
);
975 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
978 static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine
*sm
)
980 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
982 sci_port_suspend_port_task_scheduler(iport
);
984 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS
;
986 if (iport
->active_phy_mask
!= 0) {
987 /* At least one of the phys on the port is ready */
988 port_state_machine_change(iport
,
989 SCI_PORT_SUB_OPERATIONAL
);
993 static void scic_sds_port_ready_substate_waiting_exit(
994 struct sci_base_state_machine
*sm
)
996 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
997 sci_port_resume_port_task_scheduler(iport
);
1000 static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine
*sm
)
1003 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1004 struct isci_host
*ihost
= iport
->owning_controller
;
1006 isci_port_ready(ihost
, iport
);
1008 for (index
= 0; index
< SCI_MAX_PHYS
; index
++) {
1009 if (iport
->phy_table
[index
]) {
1010 writel(iport
->physical_port_index
,
1011 &iport
->port_pe_configuration_register
[
1012 iport
->phy_table
[index
]->phy_index
]);
1013 if (((iport
->active_phy_mask
^iport
->enabled_phy_mask
) & (1 << index
)) != 0)
1014 sci_port_resume_phy(iport
, iport
->phy_table
[index
]);
1018 sci_port_update_viit_entry(iport
);
1021 * Post the dummy task for the port so the hardware can schedule
1024 sci_port_post_dummy_request(iport
);
1027 static void sci_port_invalidate_dummy_remote_node(struct isci_port
*iport
)
1029 struct isci_host
*ihost
= iport
->owning_controller
;
1030 u8 phys_index
= iport
->physical_port_index
;
1031 union scu_remote_node_context
*rnc
;
1032 u16 rni
= iport
->reserved_rni
;
1035 rnc
= &ihost
->remote_node_context_table
[rni
];
1037 rnc
->ssp
.is_valid
= false;
1039 /* ensure the preceding tc abort request has reached the
1040 * controller and give it ample time to act before posting the rnc
1043 readl(&ihost
->smu_registers
->interrupt_status
); /* flush */
1046 command
= SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE
|
1047 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1049 sci_controller_post_request(ihost
, command
);
1054 * @object: This is the object which is cast to a struct isci_port object.
1056 * This method will perform the actions required by the struct isci_port on
1057 * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
1058 * the port not ready and suspends the port task scheduler. none
1060 static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine
*sm
)
1062 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1063 struct isci_host
*ihost
= iport
->owning_controller
;
1066 * Kill the dummy task for this port if it has not yet posted
1067 * the hardware will treat this as a NOP and just return abort
1070 sci_port_abort_dummy_request(iport
);
1072 isci_port_not_ready(ihost
, iport
);
1074 if (iport
->ready_exit
)
1075 sci_port_invalidate_dummy_remote_node(iport
);
1078 static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine
*sm
)
1080 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1081 struct isci_host
*ihost
= iport
->owning_controller
;
1083 if (iport
->active_phy_mask
== 0) {
1084 isci_port_not_ready(ihost
, iport
);
1086 port_state_machine_change(iport
, SCI_PORT_SUB_WAITING
);
1088 port_state_machine_change(iport
, SCI_PORT_SUB_OPERATIONAL
);
1091 enum sci_status
sci_port_start(struct isci_port
*iport
)
1093 struct isci_host
*ihost
= iport
->owning_controller
;
1094 enum sci_status status
= SCI_SUCCESS
;
1095 enum sci_port_states state
;
1098 state
= iport
->sm
.current_state_id
;
1099 if (state
!= SCI_PORT_STOPPED
) {
1100 dev_warn(sciport_to_dev(iport
),
1101 "%s: in wrong state: %d\n", __func__
, state
);
1102 return SCI_FAILURE_INVALID_STATE
;
1105 if (iport
->assigned_device_count
> 0) {
1106 /* TODO This is a start failure operation because
1107 * there are still devices assigned to this port.
1108 * There must be no devices assigned to a port on a
1111 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1114 if (iport
->reserved_rni
== SCU_DUMMY_INDEX
) {
1115 u16 rni
= sci_remote_node_table_allocate_remote_node(
1116 &ihost
->available_remote_nodes
, 1);
1118 if (rni
!= SCU_DUMMY_INDEX
)
1119 sci_port_construct_dummy_rnc(iport
, rni
);
1121 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1122 iport
->reserved_rni
= rni
;
1125 if (iport
->reserved_tag
== SCI_CONTROLLER_INVALID_IO_TAG
) {
1128 tag
= isci_alloc_tag(ihost
);
1129 if (tag
== SCI_CONTROLLER_INVALID_IO_TAG
)
1130 status
= SCI_FAILURE_INSUFFICIENT_RESOURCES
;
1132 sci_port_construct_dummy_task(iport
, tag
);
1133 iport
->reserved_tag
= tag
;
1136 if (status
== SCI_SUCCESS
) {
1137 phy_mask
= sci_port_get_phys(iport
);
1140 * There are one or more phys assigned to this port. Make sure
1141 * the port's phy mask is in fact legal and supported by the
1144 if (sci_port_is_phy_mask_valid(iport
, phy_mask
) == true) {
1145 port_state_machine_change(iport
,
1150 status
= SCI_FAILURE
;
1153 if (status
!= SCI_SUCCESS
)
1154 sci_port_destroy_dummy_resources(iport
);
1159 enum sci_status
sci_port_stop(struct isci_port
*iport
)
1161 enum sci_port_states state
;
1163 state
= iport
->sm
.current_state_id
;
1165 case SCI_PORT_STOPPED
:
1167 case SCI_PORT_SUB_WAITING
:
1168 case SCI_PORT_SUB_OPERATIONAL
:
1169 case SCI_PORT_SUB_CONFIGURING
:
1170 case SCI_PORT_RESETTING
:
1171 port_state_machine_change(iport
,
1175 dev_warn(sciport_to_dev(iport
),
1176 "%s: in wrong state: %d\n", __func__
, state
);
1177 return SCI_FAILURE_INVALID_STATE
;
1181 static enum sci_status
sci_port_hard_reset(struct isci_port
*iport
, u32 timeout
)
1183 enum sci_status status
= SCI_FAILURE_INVALID_PHY
;
1184 struct isci_phy
*iphy
= NULL
;
1185 enum sci_port_states state
;
1188 state
= iport
->sm
.current_state_id
;
1189 if (state
!= SCI_PORT_SUB_OPERATIONAL
) {
1190 dev_warn(sciport_to_dev(iport
),
1191 "%s: in wrong state: %d\n", __func__
, state
);
1192 return SCI_FAILURE_INVALID_STATE
;
1195 /* Select a phy on which we can send the hard reset request. */
1196 for (phy_index
= 0; phy_index
< SCI_MAX_PHYS
&& !iphy
; phy_index
++) {
1197 iphy
= iport
->phy_table
[phy_index
];
1198 if (iphy
&& !sci_port_active_phy(iport
, iphy
)) {
1200 * We found a phy but it is not ready select
1207 /* If we have a phy then go ahead and start the reset procedure */
1210 status
= sci_phy_reset(iphy
);
1212 if (status
!= SCI_SUCCESS
)
1215 sci_mod_timer(&iport
->timer
, timeout
);
1216 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED
;
1218 port_state_machine_change(iport
, SCI_PORT_RESETTING
);
1223 * sci_port_add_phy() -
1224 * @sci_port: This parameter specifies the port in which the phy will be added.
1225 * @sci_phy: This parameter is the phy which is to be added to the port.
1227 * This method will add a PHY to the selected port. This method returns an
1228 * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
1229 * status is a failure to add the phy to the port.
1231 enum sci_status
sci_port_add_phy(struct isci_port
*iport
,
1232 struct isci_phy
*iphy
)
1234 enum sci_status status
;
1235 enum sci_port_states state
;
1237 state
= iport
->sm
.current_state_id
;
1239 case SCI_PORT_STOPPED
: {
1240 struct sci_sas_address port_sas_address
;
1242 /* Read the port assigned SAS Address if there is one */
1243 sci_port_get_sas_address(iport
, &port_sas_address
);
1245 if (port_sas_address
.high
!= 0 && port_sas_address
.low
!= 0) {
1246 struct sci_sas_address phy_sas_address
;
1248 /* Make sure that the PHY SAS Address matches the SAS Address
1251 sci_phy_get_sas_address(iphy
, &phy_sas_address
);
1253 if (port_sas_address
.high
!= phy_sas_address
.high
||
1254 port_sas_address
.low
!= phy_sas_address
.low
)
1255 return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
;
1257 return sci_port_set_phy(iport
, iphy
);
1259 case SCI_PORT_SUB_WAITING
:
1260 case SCI_PORT_SUB_OPERATIONAL
:
1261 status
= sci_port_set_phy(iport
, iphy
);
1263 if (status
!= SCI_SUCCESS
)
1266 sci_port_general_link_up_handler(iport
, iphy
, PF_NOTIFY
|PF_RESUME
);
1267 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1268 port_state_machine_change(iport
, SCI_PORT_SUB_CONFIGURING
);
1271 case SCI_PORT_SUB_CONFIGURING
:
1272 status
= sci_port_set_phy(iport
, iphy
);
1274 if (status
!= SCI_SUCCESS
)
1276 sci_port_general_link_up_handler(iport
, iphy
, PF_NOTIFY
);
1278 /* Re-enter the configuring state since this may be the last phy in
1281 port_state_machine_change(iport
,
1282 SCI_PORT_SUB_CONFIGURING
);
1285 dev_warn(sciport_to_dev(iport
),
1286 "%s: in wrong state: %d\n", __func__
, state
);
1287 return SCI_FAILURE_INVALID_STATE
;
1292 * sci_port_remove_phy() -
1293 * @sci_port: This parameter specifies the port in which the phy will be added.
1294 * @sci_phy: This parameter is the phy which is to be added to the port.
1296 * This method will remove the PHY from the selected PORT. This method returns
1297 * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
1298 * other status is a failure to add the phy to the port.
1300 enum sci_status
sci_port_remove_phy(struct isci_port
*iport
,
1301 struct isci_phy
*iphy
)
1303 enum sci_status status
;
1304 enum sci_port_states state
;
1306 state
= iport
->sm
.current_state_id
;
1309 case SCI_PORT_STOPPED
:
1310 return sci_port_clear_phy(iport
, iphy
);
1311 case SCI_PORT_SUB_OPERATIONAL
:
1312 status
= sci_port_clear_phy(iport
, iphy
);
1313 if (status
!= SCI_SUCCESS
)
1316 sci_port_deactivate_phy(iport
, iphy
, true);
1317 iport
->not_ready_reason
= SCIC_PORT_NOT_READY_RECONFIGURING
;
1318 port_state_machine_change(iport
,
1319 SCI_PORT_SUB_CONFIGURING
);
1321 case SCI_PORT_SUB_CONFIGURING
:
1322 status
= sci_port_clear_phy(iport
, iphy
);
1324 if (status
!= SCI_SUCCESS
)
1326 sci_port_deactivate_phy(iport
, iphy
, true);
1328 /* Re-enter the configuring state since this may be the last phy in
1331 port_state_machine_change(iport
,
1332 SCI_PORT_SUB_CONFIGURING
);
1335 dev_warn(sciport_to_dev(iport
),
1336 "%s: in wrong state: %d\n", __func__
, state
);
1337 return SCI_FAILURE_INVALID_STATE
;
1341 enum sci_status
sci_port_link_up(struct isci_port
*iport
,
1342 struct isci_phy
*iphy
)
1344 enum sci_port_states state
;
1346 state
= iport
->sm
.current_state_id
;
1348 case SCI_PORT_SUB_WAITING
:
1349 /* Since this is the first phy going link up for the port we
1350 * can just enable it and continue
1352 sci_port_activate_phy(iport
, iphy
, PF_NOTIFY
|PF_RESUME
);
1354 port_state_machine_change(iport
,
1355 SCI_PORT_SUB_OPERATIONAL
);
1357 case SCI_PORT_SUB_OPERATIONAL
:
1358 sci_port_general_link_up_handler(iport
, iphy
, PF_NOTIFY
|PF_RESUME
);
1360 case SCI_PORT_RESETTING
:
1361 /* TODO We should make sure that the phy that has gone
1362 * link up is the same one on which we sent the reset. It is
1363 * possible that the phy on which we sent the reset is not the
1364 * one that has gone link up and we want to make sure that
1365 * phy being reset comes back. Consider the case where a
1366 * reset is sent but before the hardware processes the reset it
1367 * get a link up on the port because of a hot plug event.
1368 * because of the reset request this phy will go link down
1369 * almost immediately.
1372 /* In the resetting state we don't notify the user regarding
1373 * link up and link down notifications.
1375 sci_port_general_link_up_handler(iport
, iphy
, PF_RESUME
);
1378 dev_warn(sciport_to_dev(iport
),
1379 "%s: in wrong state: %d\n", __func__
, state
);
1380 return SCI_FAILURE_INVALID_STATE
;
1384 enum sci_status
sci_port_link_down(struct isci_port
*iport
,
1385 struct isci_phy
*iphy
)
1387 enum sci_port_states state
;
1389 state
= iport
->sm
.current_state_id
;
1391 case SCI_PORT_SUB_OPERATIONAL
:
1392 sci_port_deactivate_phy(iport
, iphy
, true);
1394 /* If there are no active phys left in the port, then
1395 * transition the port to the WAITING state until such time
1396 * as a phy goes link up
1398 if (iport
->active_phy_mask
== 0)
1399 port_state_machine_change(iport
,
1400 SCI_PORT_SUB_WAITING
);
1402 case SCI_PORT_RESETTING
:
1403 /* In the resetting state we don't notify the user regarding
1404 * link up and link down notifications. */
1405 sci_port_deactivate_phy(iport
, iphy
, false);
1408 dev_warn(sciport_to_dev(iport
),
1409 "%s: in wrong state: %d\n", __func__
, state
);
1410 return SCI_FAILURE_INVALID_STATE
;
1414 enum sci_status
sci_port_start_io(struct isci_port
*iport
,
1415 struct isci_remote_device
*idev
,
1416 struct isci_request
*ireq
)
1418 enum sci_port_states state
;
1420 state
= iport
->sm
.current_state_id
;
1422 case SCI_PORT_SUB_WAITING
:
1423 return SCI_FAILURE_INVALID_STATE
;
1424 case SCI_PORT_SUB_OPERATIONAL
:
1425 iport
->started_request_count
++;
1428 dev_warn(sciport_to_dev(iport
),
1429 "%s: in wrong state: %d\n", __func__
, state
);
1430 return SCI_FAILURE_INVALID_STATE
;
1434 enum sci_status
sci_port_complete_io(struct isci_port
*iport
,
1435 struct isci_remote_device
*idev
,
1436 struct isci_request
*ireq
)
1438 enum sci_port_states state
;
1440 state
= iport
->sm
.current_state_id
;
1442 case SCI_PORT_STOPPED
:
1443 dev_warn(sciport_to_dev(iport
),
1444 "%s: in wrong state: %d\n", __func__
, state
);
1445 return SCI_FAILURE_INVALID_STATE
;
1446 case SCI_PORT_STOPPING
:
1447 sci_port_decrement_request_count(iport
);
1449 if (iport
->started_request_count
== 0)
1450 port_state_machine_change(iport
,
1453 case SCI_PORT_READY
:
1454 case SCI_PORT_RESETTING
:
1455 case SCI_PORT_FAILED
:
1456 case SCI_PORT_SUB_WAITING
:
1457 case SCI_PORT_SUB_OPERATIONAL
:
1458 sci_port_decrement_request_count(iport
);
1460 case SCI_PORT_SUB_CONFIGURING
:
1461 sci_port_decrement_request_count(iport
);
1462 if (iport
->started_request_count
== 0) {
1463 port_state_machine_change(iport
,
1464 SCI_PORT_SUB_OPERATIONAL
);
1471 static void sci_port_enable_port_task_scheduler(struct isci_port
*iport
)
1473 u32 pts_control_value
;
1475 /* enable the port task scheduler in a suspended state */
1476 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1477 pts_control_value
|= SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
);
1478 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1481 static void sci_port_disable_port_task_scheduler(struct isci_port
*iport
)
1483 u32 pts_control_value
;
1485 pts_control_value
= readl(&iport
->port_task_scheduler_registers
->control
);
1486 pts_control_value
&=
1487 ~(SCU_PTSxCR_GEN_BIT(ENABLE
) | SCU_PTSxCR_GEN_BIT(SUSPEND
));
1488 writel(pts_control_value
, &iport
->port_task_scheduler_registers
->control
);
1491 static void sci_port_post_dummy_remote_node(struct isci_port
*iport
)
1493 struct isci_host
*ihost
= iport
->owning_controller
;
1494 u8 phys_index
= iport
->physical_port_index
;
1495 union scu_remote_node_context
*rnc
;
1496 u16 rni
= iport
->reserved_rni
;
1499 rnc
= &ihost
->remote_node_context_table
[rni
];
1500 rnc
->ssp
.is_valid
= true;
1502 command
= SCU_CONTEXT_COMMAND_POST_RNC_32
|
1503 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1505 sci_controller_post_request(ihost
, command
);
1507 /* ensure hardware has seen the post rnc command and give it
1508 * ample time to act before sending the suspend
1510 readl(&ihost
->smu_registers
->interrupt_status
); /* flush */
1513 command
= SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX
|
1514 phys_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
| rni
;
1516 sci_controller_post_request(ihost
, command
);
1519 static void sci_port_stopped_state_enter(struct sci_base_state_machine
*sm
)
1521 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1523 if (iport
->sm
.previous_state_id
== SCI_PORT_STOPPING
) {
1525 * If we enter this state becasuse of a request to stop
1526 * the port then we want to disable the hardwares port
1527 * task scheduler. */
1528 sci_port_disable_port_task_scheduler(iport
);
1532 static void sci_port_stopped_state_exit(struct sci_base_state_machine
*sm
)
1534 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1536 /* Enable and suspend the port task scheduler */
1537 sci_port_enable_port_task_scheduler(iport
);
1540 static void sci_port_ready_state_enter(struct sci_base_state_machine
*sm
)
1542 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1543 struct isci_host
*ihost
= iport
->owning_controller
;
1546 prev_state
= iport
->sm
.previous_state_id
;
1547 if (prev_state
== SCI_PORT_RESETTING
)
1548 isci_port_hard_reset_complete(iport
, SCI_SUCCESS
);
1550 isci_port_not_ready(ihost
, iport
);
1552 /* Post and suspend the dummy remote node context for this port. */
1553 sci_port_post_dummy_remote_node(iport
);
1555 /* Start the ready substate machine */
1556 port_state_machine_change(iport
,
1557 SCI_PORT_SUB_WAITING
);
1560 static void sci_port_resetting_state_exit(struct sci_base_state_machine
*sm
)
1562 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1564 sci_del_timer(&iport
->timer
);
1567 static void sci_port_stopping_state_exit(struct sci_base_state_machine
*sm
)
1569 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1571 sci_del_timer(&iport
->timer
);
1573 sci_port_destroy_dummy_resources(iport
);
1576 static void sci_port_failed_state_enter(struct sci_base_state_machine
*sm
)
1578 struct isci_port
*iport
= container_of(sm
, typeof(*iport
), sm
);
1580 isci_port_hard_reset_complete(iport
, SCI_FAILURE_TIMEOUT
);
1583 /* --------------------------------------------------------------------------- */
1585 static const struct sci_base_state sci_port_state_table
[] = {
1586 [SCI_PORT_STOPPED
] = {
1587 .enter_state
= sci_port_stopped_state_enter
,
1588 .exit_state
= sci_port_stopped_state_exit
1590 [SCI_PORT_STOPPING
] = {
1591 .exit_state
= sci_port_stopping_state_exit
1593 [SCI_PORT_READY
] = {
1594 .enter_state
= sci_port_ready_state_enter
,
1596 [SCI_PORT_SUB_WAITING
] = {
1597 .enter_state
= sci_port_ready_substate_waiting_enter
,
1598 .exit_state
= scic_sds_port_ready_substate_waiting_exit
,
1600 [SCI_PORT_SUB_OPERATIONAL
] = {
1601 .enter_state
= sci_port_ready_substate_operational_enter
,
1602 .exit_state
= sci_port_ready_substate_operational_exit
1604 [SCI_PORT_SUB_CONFIGURING
] = {
1605 .enter_state
= sci_port_ready_substate_configuring_enter
1607 [SCI_PORT_RESETTING
] = {
1608 .exit_state
= sci_port_resetting_state_exit
1610 [SCI_PORT_FAILED
] = {
1611 .enter_state
= sci_port_failed_state_enter
,
1615 void sci_port_construct(struct isci_port
*iport
, u8 index
,
1616 struct isci_host
*ihost
)
1618 sci_init_sm(&iport
->sm
, sci_port_state_table
, SCI_PORT_STOPPED
);
1620 iport
->logical_port_index
= SCIC_SDS_DUMMY_PORT
;
1621 iport
->physical_port_index
= index
;
1622 iport
->active_phy_mask
= 0;
1623 iport
->enabled_phy_mask
= 0;
1624 iport
->last_active_phy
= 0;
1625 iport
->ready_exit
= false;
1627 iport
->owning_controller
= ihost
;
1629 iport
->started_request_count
= 0;
1630 iport
->assigned_device_count
= 0;
1632 iport
->reserved_rni
= SCU_DUMMY_INDEX
;
1633 iport
->reserved_tag
= SCI_CONTROLLER_INVALID_IO_TAG
;
1635 sci_init_timer(&iport
->timer
, port_timeout
);
1637 iport
->port_task_scheduler_registers
= NULL
;
1639 for (index
= 0; index
< SCI_MAX_PHYS
; index
++)
1640 iport
->phy_table
[index
] = NULL
;
1643 void isci_port_init(struct isci_port
*iport
, struct isci_host
*ihost
, int index
)
1645 INIT_LIST_HEAD(&iport
->remote_dev_list
);
1646 INIT_LIST_HEAD(&iport
->domain_dev_list
);
1647 spin_lock_init(&iport
->state_lock
);
1648 init_completion(&iport
->start_complete
);
1649 iport
->isci_host
= ihost
;
1650 isci_port_change_state(iport
, isci_freed
);
1654 * isci_port_get_state() - This function gets the status of the port object.
1655 * @isci_port: This parameter points to the isci_port object
1657 * status of the object as a isci_status enum.
1659 enum isci_status
isci_port_get_state(
1660 struct isci_port
*isci_port
)
1662 return isci_port
->status
;
1665 void sci_port_broadcast_change_received(struct isci_port
*iport
, struct isci_phy
*iphy
)
1667 struct isci_host
*ihost
= iport
->owning_controller
;
1669 /* notify the user. */
1670 isci_port_bc_change_received(ihost
, iport
, iphy
);
1673 int isci_port_perform_hard_reset(struct isci_host
*ihost
, struct isci_port
*iport
,
1674 struct isci_phy
*iphy
)
1676 unsigned long flags
;
1677 enum sci_status status
;
1678 int ret
= TMF_RESP_FUNC_COMPLETE
;
1680 dev_dbg(&ihost
->pdev
->dev
, "%s: iport = %p\n",
1683 init_completion(&iport
->hard_reset_complete
);
1685 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1687 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
1688 status
= sci_port_hard_reset(iport
, ISCI_PORT_RESET_TIMEOUT
);
1690 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1692 if (status
== SCI_SUCCESS
) {
1693 wait_for_completion(&iport
->hard_reset_complete
);
1695 dev_dbg(&ihost
->pdev
->dev
,
1696 "%s: iport = %p; hard reset completion\n",
1699 if (iport
->hard_reset_status
!= SCI_SUCCESS
) {
1700 ret
= TMF_RESP_FUNC_FAILED
;
1702 dev_err(&ihost
->pdev
->dev
,
1703 "%s: iport = %p; hard reset failed (0x%x)\n",
1704 __func__
, iport
, iport
->hard_reset_status
);
1707 ret
= TMF_RESP_FUNC_FAILED
;
1709 dev_err(&ihost
->pdev
->dev
,
1710 "%s: iport = %p; sci_port_hard_reset call"
1712 __func__
, iport
, status
);
1716 /* If the hard reset for the port has failed, consider this
1717 * the same as link failures on all phys in the port.
1719 if (ret
!= TMF_RESP_FUNC_COMPLETE
) {
1721 dev_err(&ihost
->pdev
->dev
,
1722 "%s: iport = %p; hard reset failed "
1723 "(0x%x) - driving explicit link fail for all phys\n",
1724 __func__
, iport
, iport
->hard_reset_status
);
1730 * isci_port_deformed() - This function is called by libsas when a port becomes
1732 * @phy: This parameter specifies the libsas phy with the inactive port.
1735 void isci_port_deformed(struct asd_sas_phy
*phy
)
1737 pr_debug("%s: sas_phy = %p\n", __func__
, phy
);
1741 * isci_port_formed() - This function is called by libsas when a port becomes
1743 * @phy: This parameter specifies the libsas phy with the active port.
1746 void isci_port_formed(struct asd_sas_phy
*phy
)
1748 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__
, phy
, phy
->port
);