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.
29
* Redistribution and use in source and binary forms, with or without
30
* modification, are permitted provided that the following conditions
33
* * Redistributions of source code must retain the above copyright
34
* notice, this list of conditions and the following disclaimer.
35
* * Redistributions in binary form must reproduce the above copyright
36
* notice, this list of conditions and the following disclaimer in
37
* the documentation and/or other materials provided with the
39
* * Neither the name of Intel Corporation nor the names of its
40
* contributors may be used to endorse or promote products derived
41
* from this software without specific prior written permission.
43
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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
static 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_activate_phy(struct isci_port *iport, struct isci_phy *iphy,
653
struct isci_host *ihost = iport->owning_controller;
655
if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
656
sci_phy_resume(iphy);
658
iport->active_phy_mask |= 1 << iphy->phy_index;
660
sci_controller_clear_invalid_phy(ihost, iphy);
662
if (do_notify_user == true)
663
isci_port_link_up(ihost, iport, iphy);
666
void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy,
669
struct isci_host *ihost = iport->owning_controller;
671
iport->active_phy_mask &= ~(1 << iphy->phy_index);
672
if (!iport->active_phy_mask)
673
iport->last_active_phy = iphy->phy_index;
675
iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
677
/* Re-assign the phy back to the LP as if it were a narrow port */
678
writel(iphy->phy_index,
679
&iport->port_pe_configuration_register[iphy->phy_index]);
681
if (do_notify_user == true)
682
isci_port_link_down(ihost, iphy, iport);
685
static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy)
687
struct isci_host *ihost = iport->owning_controller;
690
* Check to see if we have alreay reported this link as bad and if
691
* not go ahead and tell the SCI_USER that we have discovered an
694
if ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) {
695
ihost->invalid_phy_mask |= 1 << iphy->phy_index;
696
dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
701
* sci_port_general_link_up_handler - phy can be assigned to port?
702
* @sci_port: sci_port object for which has a phy that has gone link up.
703
* @sci_phy: This is the struct isci_phy object that has gone link up.
704
* @do_notify_user: This parameter specifies whether to inform the user (via
705
* sci_port_link_up()) as to the fact that a new phy as become ready.
707
* Determine if this phy can be assigned to this
708
* port . If the phy is not a valid PHY for
709
* this port then the function will notify the user. A PHY can only be
710
* part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
711
* the same port. none
713
static void sci_port_general_link_up_handler(struct isci_port *iport,
714
struct isci_phy *iphy,
717
struct sci_sas_address port_sas_address;
718
struct sci_sas_address phy_sas_address;
720
sci_port_get_attached_sas_address(iport, &port_sas_address);
721
sci_phy_get_attached_sas_address(iphy, &phy_sas_address);
723
/* If the SAS address of the new phy matches the SAS address of
724
* other phys in the port OR this is the first phy in the port,
725
* then activate the phy and allow it to be used for operations
728
if ((phy_sas_address.high == port_sas_address.high &&
729
phy_sas_address.low == port_sas_address.low) ||
730
iport->active_phy_mask == 0) {
731
struct sci_base_state_machine *sm = &iport->sm;
733
sci_port_activate_phy(iport, iphy, do_notify_user);
734
if (sm->current_state_id == SCI_PORT_RESETTING)
735
port_state_machine_change(iport, SCI_PORT_READY);
737
sci_port_invalid_link_up(iport, iphy);
743
* This method returns false if the port only has a single phy object assigned.
744
* If there are no phys or more than one phy then the method will return
746
* @sci_port: The port for which the wide port condition is to be checked.
748
* bool true Is returned if this is a wide ported port. false Is returned if
749
* this is a narrow port.
751
static bool sci_port_is_wide(struct isci_port *iport)
756
for (index = 0; index < SCI_MAX_PHYS; index++) {
757
if (iport->phy_table[index] != NULL) {
762
return phy_count != 1;
766
* This method is called by the PHY object when the link is detected. if the
767
* port wants the PHY to continue on to the link up state then the port
768
* layer must return true. If the port object returns false the phy object
769
* must halt its attempt to go link up.
770
* @sci_port: The port associated with the phy object.
771
* @sci_phy: The phy object that is trying to go link up.
773
* true if the phy object can continue to the link up condition. true Is
774
* returned if this phy can continue to the ready state. false Is returned if
775
* can not continue on to the ready state. This notification is in place for
776
* wide ports and direct attached phys. Since there are no wide ported SATA
777
* devices this could become an invalid port configuration.
779
bool sci_port_link_detected(
780
struct isci_port *iport,
781
struct isci_phy *iphy)
783
if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
784
(iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
785
sci_port_is_wide(iport)) {
786
sci_port_invalid_link_up(iport, iphy);
794
static void port_timeout(unsigned long data)
796
struct sci_timer *tmr = (struct sci_timer *)data;
797
struct isci_port *iport = container_of(tmr, typeof(*iport), timer);
798
struct isci_host *ihost = iport->owning_controller;
802
spin_lock_irqsave(&ihost->scic_lock, flags);
807
current_state = iport->sm.current_state_id;
809
if (current_state == SCI_PORT_RESETTING) {
810
/* if the port is still in the resetting state then the timeout
811
* fired before the reset completed.
813
port_state_machine_change(iport, SCI_PORT_FAILED);
814
} else if (current_state == SCI_PORT_STOPPED) {
815
/* if the port is stopped then the start request failed In this
816
* case stay in the stopped state.
818
dev_err(sciport_to_dev(iport),
819
"%s: SCIC Port 0x%p failed to stop before tiemout.\n",
822
} else if (current_state == SCI_PORT_STOPPING) {
823
/* if the port is still stopping then the stop has not completed */
824
isci_port_stop_complete(iport->owning_controller,
826
SCI_FAILURE_TIMEOUT);
828
/* The port is in the ready state and we have a timer
829
* reporting a timeout this should not happen.
831
dev_err(sciport_to_dev(iport),
832
"%s: SCIC Port 0x%p is processing a timeout operation "
833
"in state %d.\n", __func__, iport, current_state);
837
spin_unlock_irqrestore(&ihost->scic_lock, flags);
840
/* --------------------------------------------------------------------------- */
843
* This function updates the hardwares VIIT entry for this port.
847
static void sci_port_update_viit_entry(struct isci_port *iport)
849
struct sci_sas_address sas_address;
851
sci_port_get_sas_address(iport, &sas_address);
853
writel(sas_address.high,
854
&iport->viit_registers->initiator_sas_address_hi);
855
writel(sas_address.low,
856
&iport->viit_registers->initiator_sas_address_lo);
858
/* This value get cleared just in case its not already cleared */
859
writel(0, &iport->viit_registers->reserved);
861
/* We are required to update the status register last */
862
writel(SCU_VIIT_ENTRY_ID_VIIT |
863
SCU_VIIT_IPPT_INITIATOR |
864
((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
865
SCU_VIIT_STATUS_ALL_VALID,
866
&iport->viit_registers->status);
869
enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport)
872
struct isci_phy *iphy;
873
enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
876
* Loop through all of the phys in this port and find the phy with the
877
* lowest maximum link rate. */
878
for (index = 0; index < SCI_MAX_PHYS; index++) {
879
iphy = iport->phy_table[index];
880
if (iphy && sci_port_active_phy(iport, iphy) &&
881
iphy->max_negotiated_speed < max_allowed_speed)
882
max_allowed_speed = iphy->max_negotiated_speed;
885
return max_allowed_speed;
888
static void sci_port_suspend_port_task_scheduler(struct isci_port *iport)
890
u32 pts_control_value;
892
pts_control_value = readl(&iport->port_task_scheduler_registers->control);
893
pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
894
writel(pts_control_value, &iport->port_task_scheduler_registers->control);
898
* sci_port_post_dummy_request() - post dummy/workaround request
899
* @sci_port: port to post task
901
* Prevent the hardware scheduler from posting new requests to the front
902
* of the scheduler queue causing a starvation problem for currently
906
static void sci_port_post_dummy_request(struct isci_port *iport)
908
struct isci_host *ihost = iport->owning_controller;
909
u16 tag = iport->reserved_tag;
910
struct scu_task_context *tc;
913
tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
916
command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
917
iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
920
sci_controller_post_request(ihost, command);
924
* This routine will abort the dummy request. This will alow the hardware to
925
* power down parts of the silicon to save power.
927
* @sci_port: The port on which the task must be aborted.
930
static void sci_port_abort_dummy_request(struct isci_port *iport)
932
struct isci_host *ihost = iport->owning_controller;
933
u16 tag = iport->reserved_tag;
934
struct scu_task_context *tc;
937
tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)];
940
command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
941
iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
944
sci_controller_post_request(ihost, command);
949
* @sci_port: This is the struct isci_port object to resume.
951
* This method will resume the port task scheduler for this port object. none
954
sci_port_resume_port_task_scheduler(struct isci_port *iport)
956
u32 pts_control_value;
958
pts_control_value = readl(&iport->port_task_scheduler_registers->control);
959
pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
960
writel(pts_control_value, &iport->port_task_scheduler_registers->control);
963
static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm)
965
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
967
sci_port_suspend_port_task_scheduler(iport);
969
iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
971
if (iport->active_phy_mask != 0) {
972
/* At least one of the phys on the port is ready */
973
port_state_machine_change(iport,
974
SCI_PORT_SUB_OPERATIONAL);
978
static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm)
981
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
982
struct isci_host *ihost = iport->owning_controller;
984
isci_port_ready(ihost, iport);
986
for (index = 0; index < SCI_MAX_PHYS; index++) {
987
if (iport->phy_table[index]) {
988
writel(iport->physical_port_index,
989
&iport->port_pe_configuration_register[
990
iport->phy_table[index]->phy_index]);
994
sci_port_update_viit_entry(iport);
996
sci_port_resume_port_task_scheduler(iport);
999
* Post the dummy task for the port so the hardware can schedule
1002
sci_port_post_dummy_request(iport);
1005
static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport)
1007
struct isci_host *ihost = iport->owning_controller;
1008
u8 phys_index = iport->physical_port_index;
1009
union scu_remote_node_context *rnc;
1010
u16 rni = iport->reserved_rni;
1013
rnc = &ihost->remote_node_context_table[rni];
1015
rnc->ssp.is_valid = false;
1017
/* ensure the preceding tc abort request has reached the
1018
* controller and give it ample time to act before posting the rnc
1021
readl(&ihost->smu_registers->interrupt_status); /* flush */
1024
command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
1025
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
1027
sci_controller_post_request(ihost, command);
1032
* @object: This is the object which is cast to a struct isci_port object.
1034
* This method will perform the actions required by the struct isci_port on
1035
* exiting the SCI_PORT_SUB_OPERATIONAL. This function reports
1036
* the port not ready and suspends the port task scheduler. none
1038
static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm)
1040
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1041
struct isci_host *ihost = iport->owning_controller;
1044
* Kill the dummy task for this port if it has not yet posted
1045
* the hardware will treat this as a NOP and just return abort
1048
sci_port_abort_dummy_request(iport);
1050
isci_port_not_ready(ihost, iport);
1052
if (iport->ready_exit)
1053
sci_port_invalidate_dummy_remote_node(iport);
1056
static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm)
1058
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1059
struct isci_host *ihost = iport->owning_controller;
1061
if (iport->active_phy_mask == 0) {
1062
isci_port_not_ready(ihost, iport);
1064
port_state_machine_change(iport,
1065
SCI_PORT_SUB_WAITING);
1066
} else if (iport->started_request_count == 0)
1067
port_state_machine_change(iport,
1068
SCI_PORT_SUB_OPERATIONAL);
1071
static void sci_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm)
1073
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1075
sci_port_suspend_port_task_scheduler(iport);
1076
if (iport->ready_exit)
1077
sci_port_invalidate_dummy_remote_node(iport);
1080
enum sci_status sci_port_start(struct isci_port *iport)
1082
struct isci_host *ihost = iport->owning_controller;
1083
enum sci_status status = SCI_SUCCESS;
1084
enum sci_port_states state;
1087
state = iport->sm.current_state_id;
1088
if (state != SCI_PORT_STOPPED) {
1089
dev_warn(sciport_to_dev(iport),
1090
"%s: in wrong state: %d\n", __func__, state);
1091
return SCI_FAILURE_INVALID_STATE;
1094
if (iport->assigned_device_count > 0) {
1095
/* TODO This is a start failure operation because
1096
* there are still devices assigned to this port.
1097
* There must be no devices assigned to a port on a
1100
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
1103
if (iport->reserved_rni == SCU_DUMMY_INDEX) {
1104
u16 rni = sci_remote_node_table_allocate_remote_node(
1105
&ihost->available_remote_nodes, 1);
1107
if (rni != SCU_DUMMY_INDEX)
1108
sci_port_construct_dummy_rnc(iport, rni);
1110
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
1111
iport->reserved_rni = rni;
1114
if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
1117
tag = isci_alloc_tag(ihost);
1118
if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
1119
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
1121
sci_port_construct_dummy_task(iport, tag);
1122
iport->reserved_tag = tag;
1125
if (status == SCI_SUCCESS) {
1126
phy_mask = sci_port_get_phys(iport);
1129
* There are one or more phys assigned to this port. Make sure
1130
* the port's phy mask is in fact legal and supported by the
1133
if (sci_port_is_phy_mask_valid(iport, phy_mask) == true) {
1134
port_state_machine_change(iport,
1139
status = SCI_FAILURE;
1142
if (status != SCI_SUCCESS)
1143
sci_port_destroy_dummy_resources(iport);
1148
enum sci_status sci_port_stop(struct isci_port *iport)
1150
enum sci_port_states state;
1152
state = iport->sm.current_state_id;
1154
case SCI_PORT_STOPPED:
1156
case SCI_PORT_SUB_WAITING:
1157
case SCI_PORT_SUB_OPERATIONAL:
1158
case SCI_PORT_SUB_CONFIGURING:
1159
case SCI_PORT_RESETTING:
1160
port_state_machine_change(iport,
1164
dev_warn(sciport_to_dev(iport),
1165
"%s: in wrong state: %d\n", __func__, state);
1166
return SCI_FAILURE_INVALID_STATE;
1170
static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout)
1172
enum sci_status status = SCI_FAILURE_INVALID_PHY;
1173
struct isci_phy *iphy = NULL;
1174
enum sci_port_states state;
1177
state = iport->sm.current_state_id;
1178
if (state != SCI_PORT_SUB_OPERATIONAL) {
1179
dev_warn(sciport_to_dev(iport),
1180
"%s: in wrong state: %d\n", __func__, state);
1181
return SCI_FAILURE_INVALID_STATE;
1184
/* Select a phy on which we can send the hard reset request. */
1185
for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) {
1186
iphy = iport->phy_table[phy_index];
1187
if (iphy && !sci_port_active_phy(iport, iphy)) {
1189
* We found a phy but it is not ready select
1196
/* If we have a phy then go ahead and start the reset procedure */
1199
status = sci_phy_reset(iphy);
1201
if (status != SCI_SUCCESS)
1204
sci_mod_timer(&iport->timer, timeout);
1205
iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
1207
port_state_machine_change(iport, SCI_PORT_RESETTING);
1212
* sci_port_add_phy() -
1213
* @sci_port: This parameter specifies the port in which the phy will be added.
1214
* @sci_phy: This parameter is the phy which is to be added to the port.
1216
* This method will add a PHY to the selected port. This method returns an
1217
* enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
1218
* status is a failure to add the phy to the port.
1220
enum sci_status sci_port_add_phy(struct isci_port *iport,
1221
struct isci_phy *iphy)
1223
enum sci_status status;
1224
enum sci_port_states state;
1226
state = iport->sm.current_state_id;
1228
case SCI_PORT_STOPPED: {
1229
struct sci_sas_address port_sas_address;
1231
/* Read the port assigned SAS Address if there is one */
1232
sci_port_get_sas_address(iport, &port_sas_address);
1234
if (port_sas_address.high != 0 && port_sas_address.low != 0) {
1235
struct sci_sas_address phy_sas_address;
1237
/* Make sure that the PHY SAS Address matches the SAS Address
1240
sci_phy_get_sas_address(iphy, &phy_sas_address);
1242
if (port_sas_address.high != phy_sas_address.high ||
1243
port_sas_address.low != phy_sas_address.low)
1244
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
1246
return sci_port_set_phy(iport, iphy);
1248
case SCI_PORT_SUB_WAITING:
1249
case SCI_PORT_SUB_OPERATIONAL:
1250
status = sci_port_set_phy(iport, iphy);
1252
if (status != SCI_SUCCESS)
1255
sci_port_general_link_up_handler(iport, iphy, true);
1256
iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
1257
port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING);
1260
case SCI_PORT_SUB_CONFIGURING:
1261
status = sci_port_set_phy(iport, iphy);
1263
if (status != SCI_SUCCESS)
1265
sci_port_general_link_up_handler(iport, iphy, true);
1267
/* Re-enter the configuring state since this may be the last phy in
1270
port_state_machine_change(iport,
1271
SCI_PORT_SUB_CONFIGURING);
1274
dev_warn(sciport_to_dev(iport),
1275
"%s: in wrong state: %d\n", __func__, state);
1276
return SCI_FAILURE_INVALID_STATE;
1281
* sci_port_remove_phy() -
1282
* @sci_port: This parameter specifies the port in which the phy will be added.
1283
* @sci_phy: This parameter is the phy which is to be added to the port.
1285
* This method will remove the PHY from the selected PORT. This method returns
1286
* an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
1287
* other status is a failure to add the phy to the port.
1289
enum sci_status sci_port_remove_phy(struct isci_port *iport,
1290
struct isci_phy *iphy)
1292
enum sci_status status;
1293
enum sci_port_states state;
1295
state = iport->sm.current_state_id;
1298
case SCI_PORT_STOPPED:
1299
return sci_port_clear_phy(iport, iphy);
1300
case SCI_PORT_SUB_OPERATIONAL:
1301
status = sci_port_clear_phy(iport, iphy);
1302
if (status != SCI_SUCCESS)
1305
sci_port_deactivate_phy(iport, iphy, true);
1306
iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
1307
port_state_machine_change(iport,
1308
SCI_PORT_SUB_CONFIGURING);
1310
case SCI_PORT_SUB_CONFIGURING:
1311
status = sci_port_clear_phy(iport, iphy);
1313
if (status != SCI_SUCCESS)
1315
sci_port_deactivate_phy(iport, iphy, true);
1317
/* Re-enter the configuring state since this may be the last phy in
1320
port_state_machine_change(iport,
1321
SCI_PORT_SUB_CONFIGURING);
1324
dev_warn(sciport_to_dev(iport),
1325
"%s: in wrong state: %d\n", __func__, state);
1326
return SCI_FAILURE_INVALID_STATE;
1330
enum sci_status sci_port_link_up(struct isci_port *iport,
1331
struct isci_phy *iphy)
1333
enum sci_port_states state;
1335
state = iport->sm.current_state_id;
1337
case SCI_PORT_SUB_WAITING:
1338
/* Since this is the first phy going link up for the port we
1339
* can just enable it and continue
1341
sci_port_activate_phy(iport, iphy, true);
1343
port_state_machine_change(iport,
1344
SCI_PORT_SUB_OPERATIONAL);
1346
case SCI_PORT_SUB_OPERATIONAL:
1347
sci_port_general_link_up_handler(iport, iphy, true);
1349
case SCI_PORT_RESETTING:
1350
/* TODO We should make sure that the phy that has gone
1351
* link up is the same one on which we sent the reset. It is
1352
* possible that the phy on which we sent the reset is not the
1353
* one that has gone link up and we want to make sure that
1354
* phy being reset comes back. Consider the case where a
1355
* reset is sent but before the hardware processes the reset it
1356
* get a link up on the port because of a hot plug event.
1357
* because of the reset request this phy will go link down
1358
* almost immediately.
1361
/* In the resetting state we don't notify the user regarding
1362
* link up and link down notifications.
1364
sci_port_general_link_up_handler(iport, iphy, false);
1367
dev_warn(sciport_to_dev(iport),
1368
"%s: in wrong state: %d\n", __func__, state);
1369
return SCI_FAILURE_INVALID_STATE;
1373
enum sci_status sci_port_link_down(struct isci_port *iport,
1374
struct isci_phy *iphy)
1376
enum sci_port_states state;
1378
state = iport->sm.current_state_id;
1380
case SCI_PORT_SUB_OPERATIONAL:
1381
sci_port_deactivate_phy(iport, iphy, true);
1383
/* If there are no active phys left in the port, then
1384
* transition the port to the WAITING state until such time
1385
* as a phy goes link up
1387
if (iport->active_phy_mask == 0)
1388
port_state_machine_change(iport,
1389
SCI_PORT_SUB_WAITING);
1391
case SCI_PORT_RESETTING:
1392
/* In the resetting state we don't notify the user regarding
1393
* link up and link down notifications. */
1394
sci_port_deactivate_phy(iport, iphy, false);
1397
dev_warn(sciport_to_dev(iport),
1398
"%s: in wrong state: %d\n", __func__, state);
1399
return SCI_FAILURE_INVALID_STATE;
1403
enum sci_status sci_port_start_io(struct isci_port *iport,
1404
struct isci_remote_device *idev,
1405
struct isci_request *ireq)
1407
enum sci_port_states state;
1409
state = iport->sm.current_state_id;
1411
case SCI_PORT_SUB_WAITING:
1412
return SCI_FAILURE_INVALID_STATE;
1413
case SCI_PORT_SUB_OPERATIONAL:
1414
iport->started_request_count++;
1417
dev_warn(sciport_to_dev(iport),
1418
"%s: in wrong state: %d\n", __func__, state);
1419
return SCI_FAILURE_INVALID_STATE;
1423
enum sci_status sci_port_complete_io(struct isci_port *iport,
1424
struct isci_remote_device *idev,
1425
struct isci_request *ireq)
1427
enum sci_port_states state;
1429
state = iport->sm.current_state_id;
1431
case SCI_PORT_STOPPED:
1432
dev_warn(sciport_to_dev(iport),
1433
"%s: in wrong state: %d\n", __func__, state);
1434
return SCI_FAILURE_INVALID_STATE;
1435
case SCI_PORT_STOPPING:
1436
sci_port_decrement_request_count(iport);
1438
if (iport->started_request_count == 0)
1439
port_state_machine_change(iport,
1442
case SCI_PORT_READY:
1443
case SCI_PORT_RESETTING:
1444
case SCI_PORT_FAILED:
1445
case SCI_PORT_SUB_WAITING:
1446
case SCI_PORT_SUB_OPERATIONAL:
1447
sci_port_decrement_request_count(iport);
1449
case SCI_PORT_SUB_CONFIGURING:
1450
sci_port_decrement_request_count(iport);
1451
if (iport->started_request_count == 0) {
1452
port_state_machine_change(iport,
1453
SCI_PORT_SUB_OPERATIONAL);
1460
static void sci_port_enable_port_task_scheduler(struct isci_port *iport)
1462
u32 pts_control_value;
1464
/* enable the port task scheduler in a suspended state */
1465
pts_control_value = readl(&iport->port_task_scheduler_registers->control);
1466
pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
1467
writel(pts_control_value, &iport->port_task_scheduler_registers->control);
1470
static void sci_port_disable_port_task_scheduler(struct isci_port *iport)
1472
u32 pts_control_value;
1474
pts_control_value = readl(&iport->port_task_scheduler_registers->control);
1475
pts_control_value &=
1476
~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
1477
writel(pts_control_value, &iport->port_task_scheduler_registers->control);
1480
static void sci_port_post_dummy_remote_node(struct isci_port *iport)
1482
struct isci_host *ihost = iport->owning_controller;
1483
u8 phys_index = iport->physical_port_index;
1484
union scu_remote_node_context *rnc;
1485
u16 rni = iport->reserved_rni;
1488
rnc = &ihost->remote_node_context_table[rni];
1489
rnc->ssp.is_valid = true;
1491
command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
1492
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
1494
sci_controller_post_request(ihost, command);
1496
/* ensure hardware has seen the post rnc command and give it
1497
* ample time to act before sending the suspend
1499
readl(&ihost->smu_registers->interrupt_status); /* flush */
1502
command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
1503
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
1505
sci_controller_post_request(ihost, command);
1508
static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm)
1510
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1512
if (iport->sm.previous_state_id == SCI_PORT_STOPPING) {
1514
* If we enter this state becasuse of a request to stop
1515
* the port then we want to disable the hardwares port
1516
* task scheduler. */
1517
sci_port_disable_port_task_scheduler(iport);
1521
static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm)
1523
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1525
/* Enable and suspend the port task scheduler */
1526
sci_port_enable_port_task_scheduler(iport);
1529
static void sci_port_ready_state_enter(struct sci_base_state_machine *sm)
1531
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1532
struct isci_host *ihost = iport->owning_controller;
1535
prev_state = iport->sm.previous_state_id;
1536
if (prev_state == SCI_PORT_RESETTING)
1537
isci_port_hard_reset_complete(iport, SCI_SUCCESS);
1539
isci_port_not_ready(ihost, iport);
1541
/* Post and suspend the dummy remote node context for this port. */
1542
sci_port_post_dummy_remote_node(iport);
1544
/* Start the ready substate machine */
1545
port_state_machine_change(iport,
1546
SCI_PORT_SUB_WAITING);
1549
static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm)
1551
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1553
sci_del_timer(&iport->timer);
1556
static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm)
1558
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1560
sci_del_timer(&iport->timer);
1562
sci_port_destroy_dummy_resources(iport);
1565
static void sci_port_failed_state_enter(struct sci_base_state_machine *sm)
1567
struct isci_port *iport = container_of(sm, typeof(*iport), sm);
1569
isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
1572
/* --------------------------------------------------------------------------- */
1574
static const struct sci_base_state sci_port_state_table[] = {
1575
[SCI_PORT_STOPPED] = {
1576
.enter_state = sci_port_stopped_state_enter,
1577
.exit_state = sci_port_stopped_state_exit
1579
[SCI_PORT_STOPPING] = {
1580
.exit_state = sci_port_stopping_state_exit
1582
[SCI_PORT_READY] = {
1583
.enter_state = sci_port_ready_state_enter,
1585
[SCI_PORT_SUB_WAITING] = {
1586
.enter_state = sci_port_ready_substate_waiting_enter,
1588
[SCI_PORT_SUB_OPERATIONAL] = {
1589
.enter_state = sci_port_ready_substate_operational_enter,
1590
.exit_state = sci_port_ready_substate_operational_exit
1592
[SCI_PORT_SUB_CONFIGURING] = {
1593
.enter_state = sci_port_ready_substate_configuring_enter,
1594
.exit_state = sci_port_ready_substate_configuring_exit
1596
[SCI_PORT_RESETTING] = {
1597
.exit_state = sci_port_resetting_state_exit
1599
[SCI_PORT_FAILED] = {
1600
.enter_state = sci_port_failed_state_enter,
1604
void sci_port_construct(struct isci_port *iport, u8 index,
1605
struct isci_host *ihost)
1607
sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED);
1609
iport->logical_port_index = SCIC_SDS_DUMMY_PORT;
1610
iport->physical_port_index = index;
1611
iport->active_phy_mask = 0;
1612
iport->last_active_phy = 0;
1613
iport->ready_exit = false;
1615
iport->owning_controller = ihost;
1617
iport->started_request_count = 0;
1618
iport->assigned_device_count = 0;
1620
iport->reserved_rni = SCU_DUMMY_INDEX;
1621
iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG;
1623
sci_init_timer(&iport->timer, port_timeout);
1625
iport->port_task_scheduler_registers = NULL;
1627
for (index = 0; index < SCI_MAX_PHYS; index++)
1628
iport->phy_table[index] = NULL;
1631
void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
1633
INIT_LIST_HEAD(&iport->remote_dev_list);
1634
INIT_LIST_HEAD(&iport->domain_dev_list);
1635
spin_lock_init(&iport->state_lock);
1636
init_completion(&iport->start_complete);
1637
iport->isci_host = ihost;
1638
isci_port_change_state(iport, isci_freed);
1642
* isci_port_get_state() - This function gets the status of the port object.
1643
* @isci_port: This parameter points to the isci_port object
1645
* status of the object as a isci_status enum.
1647
enum isci_status isci_port_get_state(
1648
struct isci_port *isci_port)
1650
return isci_port->status;
1653
void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy)
1655
struct isci_host *ihost = iport->owning_controller;
1657
/* notify the user. */
1658
isci_port_bc_change_received(ihost, iport, iphy);
1661
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
1662
struct isci_phy *iphy)
1664
unsigned long flags;
1665
enum sci_status status;
1666
int ret = TMF_RESP_FUNC_COMPLETE;
1668
dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
1671
init_completion(&iport->hard_reset_complete);
1673
spin_lock_irqsave(&ihost->scic_lock, flags);
1675
#define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
1676
status = sci_port_hard_reset(iport, ISCI_PORT_RESET_TIMEOUT);
1678
spin_unlock_irqrestore(&ihost->scic_lock, flags);
1680
if (status == SCI_SUCCESS) {
1681
wait_for_completion(&iport->hard_reset_complete);
1683
dev_dbg(&ihost->pdev->dev,
1684
"%s: iport = %p; hard reset completion\n",
1687
if (iport->hard_reset_status != SCI_SUCCESS) {
1688
ret = TMF_RESP_FUNC_FAILED;
1690
dev_err(&ihost->pdev->dev,
1691
"%s: iport = %p; hard reset failed (0x%x)\n",
1692
__func__, iport, iport->hard_reset_status);
1695
ret = TMF_RESP_FUNC_FAILED;
1697
dev_err(&ihost->pdev->dev,
1698
"%s: iport = %p; sci_port_hard_reset call"
1700
__func__, iport, status);
1704
/* If the hard reset for the port has failed, consider this
1705
* the same as link failures on all phys in the port.
1707
if (ret != TMF_RESP_FUNC_COMPLETE) {
1709
dev_err(&ihost->pdev->dev,
1710
"%s: iport = %p; hard reset failed "
1711
"(0x%x) - driving explicit link fail for all phys\n",
1712
__func__, iport, iport->hard_reset_status);
1718
* isci_port_deformed() - This function is called by libsas when a port becomes
1720
* @phy: This parameter specifies the libsas phy with the inactive port.
1723
void isci_port_deformed(struct asd_sas_phy *phy)
1725
pr_debug("%s: sas_phy = %p\n", __func__, phy);
1729
* isci_port_formed() - This function is called by libsas when a port becomes
1731
* @phy: This parameter specifies the libsas phy with the active port.
1734
void isci_port_formed(struct asd_sas_phy *phy)
1736
pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);