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
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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
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 #include "scic_io_request.h"
58 #include "scic_port.h"
62 #include "probe_roms.h"
63 #include "scic_sds_controller.h"
65 irqreturn_t
isci_msix_isr(int vec
, void *data
)
67 struct isci_host
*ihost
= data
;
69 if (scic_sds_controller_isr(&ihost
->sci
))
70 tasklet_schedule(&ihost
->completion_tasklet
);
75 irqreturn_t
isci_intx_isr(int vec
, void *data
)
77 irqreturn_t ret
= IRQ_NONE
;
78 struct isci_host
*ihost
= data
;
79 struct scic_sds_controller
*scic
= &ihost
->sci
;
81 if (scic_sds_controller_isr(scic
)) {
82 writel(SMU_ISR_COMPLETION
, &scic
->smu_registers
->interrupt_status
);
83 tasklet_schedule(&ihost
->completion_tasklet
);
85 } else if (scic_sds_controller_error_isr(scic
)) {
86 spin_lock(&ihost
->scic_lock
);
87 scic_sds_controller_error_handler(scic
);
88 spin_unlock(&ihost
->scic_lock
);
95 irqreturn_t
isci_error_isr(int vec
, void *data
)
97 struct isci_host
*ihost
= data
;
99 if (scic_sds_controller_error_isr(&ihost
->sci
))
100 scic_sds_controller_error_handler(&ihost
->sci
);
106 * isci_host_start_complete() - This function is called by the core library,
107 * through the ISCI Module, to indicate controller start status.
108 * @isci_host: This parameter specifies the ISCI host object
109 * @completion_status: This parameter specifies the completion status from the
113 void isci_host_start_complete(struct isci_host
*ihost
, enum sci_status completion_status
)
115 if (completion_status
!= SCI_SUCCESS
)
116 dev_info(&ihost
->pdev
->dev
,
117 "controller start timed out, continuing...\n");
118 isci_host_change_state(ihost
, isci_ready
);
119 clear_bit(IHOST_START_PENDING
, &ihost
->flags
);
120 wake_up(&ihost
->eventq
);
123 int isci_host_scan_finished(struct Scsi_Host
*shost
, unsigned long time
)
125 struct isci_host
*ihost
= SHOST_TO_SAS_HA(shost
)->lldd_ha
;
127 if (test_bit(IHOST_START_PENDING
, &ihost
->flags
))
130 /* todo: use sas_flush_discovery once it is upstream */
131 scsi_flush_work(shost
);
133 scsi_flush_work(shost
);
135 dev_dbg(&ihost
->pdev
->dev
,
136 "%s: ihost->status = %d, time = %ld\n",
137 __func__
, isci_host_get_state(ihost
), time
);
143 void isci_host_scan_start(struct Scsi_Host
*shost
)
145 struct isci_host
*ihost
= SHOST_TO_SAS_HA(shost
)->lldd_ha
;
146 unsigned long tmo
= scic_controller_get_suggested_start_timeout(&ihost
->sci
);
148 set_bit(IHOST_START_PENDING
, &ihost
->flags
);
150 spin_lock_irq(&ihost
->scic_lock
);
151 scic_controller_start(&ihost
->sci
, tmo
);
152 scic_controller_enable_interrupts(&ihost
->sci
);
153 spin_unlock_irq(&ihost
->scic_lock
);
156 void isci_host_stop_complete(struct isci_host
*ihost
, enum sci_status completion_status
)
158 isci_host_change_state(ihost
, isci_stopped
);
159 scic_controller_disable_interrupts(&ihost
->sci
);
160 clear_bit(IHOST_STOP_PENDING
, &ihost
->flags
);
161 wake_up(&ihost
->eventq
);
165 * isci_host_completion_routine() - This function is the delayed service
166 * routine that calls the sci core library's completion handler. It's
167 * scheduled as a tasklet from the interrupt service routine when interrupts
168 * in use, or set as the timeout function in polled mode.
169 * @data: This parameter specifies the ISCI host object
172 static void isci_host_completion_routine(unsigned long data
)
174 struct isci_host
*isci_host
= (struct isci_host
*)data
;
175 struct list_head completed_request_list
;
176 struct list_head errored_request_list
;
177 struct list_head
*current_position
;
178 struct list_head
*next_position
;
179 struct isci_request
*request
;
180 struct isci_request
*next_request
;
181 struct sas_task
*task
;
183 INIT_LIST_HEAD(&completed_request_list
);
184 INIT_LIST_HEAD(&errored_request_list
);
186 spin_lock_irq(&isci_host
->scic_lock
);
188 scic_sds_controller_completion_handler(&isci_host
->sci
);
190 /* Take the lists of completed I/Os from the host. */
192 list_splice_init(&isci_host
->requests_to_complete
,
193 &completed_request_list
);
195 /* Take the list of errored I/Os from the host. */
196 list_splice_init(&isci_host
->requests_to_errorback
,
197 &errored_request_list
);
199 spin_unlock_irq(&isci_host
->scic_lock
);
201 /* Process any completions in the lists. */
202 list_for_each_safe(current_position
, next_position
,
203 &completed_request_list
) {
205 request
= list_entry(current_position
, struct isci_request
,
207 task
= isci_request_access_task(request
);
209 /* Normal notification (task_done) */
210 dev_dbg(&isci_host
->pdev
->dev
,
211 "%s: Normal - request/task = %p/%p\n",
216 /* Return the task to libsas */
219 task
->lldd_task
= NULL
;
220 if (!(task
->task_state_flags
& SAS_TASK_STATE_ABORTED
)) {
222 /* If the task is already in the abort path,
223 * the task_done callback cannot be called.
225 task
->task_done(task
);
228 /* Free the request object. */
229 isci_request_free(isci_host
, request
);
231 list_for_each_entry_safe(request
, next_request
, &errored_request_list
,
234 task
= isci_request_access_task(request
);
236 /* Use sas_task_abort */
237 dev_warn(&isci_host
->pdev
->dev
,
238 "%s: Error - request/task = %p/%p\n",
245 /* Put the task into the abort path if it's not there
248 if (!(task
->task_state_flags
& SAS_TASK_STATE_ABORTED
))
249 sas_task_abort(task
);
252 /* This is a case where the request has completed with a
253 * status such that it needed further target servicing,
254 * but the sas_task reference has already been removed
255 * from the request. Since it was errored, it was not
256 * being aborted, so there is nothing to do except free
260 spin_lock_irq(&isci_host
->scic_lock
);
261 /* Remove the request from the remote device's list
262 * of pending requests.
264 list_del_init(&request
->dev_node
);
265 spin_unlock_irq(&isci_host
->scic_lock
);
267 /* Free the request object. */
268 isci_request_free(isci_host
, request
);
274 void isci_host_deinit(struct isci_host
*ihost
)
278 isci_host_change_state(ihost
, isci_stopping
);
279 for (i
= 0; i
< SCI_MAX_PORTS
; i
++) {
280 struct isci_port
*iport
= &ihost
->ports
[i
];
281 struct isci_remote_device
*idev
, *d
;
283 list_for_each_entry_safe(idev
, d
, &iport
->remote_dev_list
, node
) {
284 isci_remote_device_change_state(idev
, isci_stopping
);
285 isci_remote_device_stop(ihost
, idev
);
289 set_bit(IHOST_STOP_PENDING
, &ihost
->flags
);
291 spin_lock_irq(&ihost
->scic_lock
);
292 scic_controller_stop(&ihost
->sci
, SCIC_CONTROLLER_STOP_TIMEOUT
);
293 spin_unlock_irq(&ihost
->scic_lock
);
295 wait_for_stop(ihost
);
296 scic_controller_reset(&ihost
->sci
);
297 isci_timer_list_destroy(ihost
);
300 static void __iomem
*scu_base(struct isci_host
*isci_host
)
302 struct pci_dev
*pdev
= isci_host
->pdev
;
303 int id
= isci_host
->id
;
305 return pcim_iomap_table(pdev
)[SCI_SCU_BAR
* 2] + SCI_SCU_BAR_SIZE
* id
;
308 static void __iomem
*smu_base(struct isci_host
*isci_host
)
310 struct pci_dev
*pdev
= isci_host
->pdev
;
311 int id
= isci_host
->id
;
313 return pcim_iomap_table(pdev
)[SCI_SMU_BAR
* 2] + SCI_SMU_BAR_SIZE
* id
;
316 static void isci_user_parameters_get(
317 struct isci_host
*isci_host
,
318 union scic_user_parameters
*scic_user_params
)
320 struct scic_sds_user_parameters
*u
= &scic_user_params
->sds1
;
323 for (i
= 0; i
< SCI_MAX_PHYS
; i
++) {
324 struct sci_phy_user_params
*u_phy
= &u
->phys
[i
];
326 u_phy
->max_speed_generation
= phy_gen
;
328 /* we are not exporting these for now */
329 u_phy
->align_insertion_frequency
= 0x7f;
330 u_phy
->in_connection_align_insertion_frequency
= 0xff;
331 u_phy
->notify_enable_spin_up_insertion_frequency
= 0x33;
334 u
->stp_inactivity_timeout
= stp_inactive_to
;
335 u
->ssp_inactivity_timeout
= ssp_inactive_to
;
336 u
->stp_max_occupancy_timeout
= stp_max_occ_to
;
337 u
->ssp_max_occupancy_timeout
= ssp_max_occ_to
;
338 u
->no_outbound_task_timeout
= no_outbound_task_to
;
339 u
->max_number_concurrent_device_spin_up
= max_concurr_spinup
;
342 int isci_host_init(struct isci_host
*isci_host
)
345 enum sci_status status
;
346 union scic_oem_parameters oem
;
347 union scic_user_parameters scic_user_params
;
348 struct isci_pci_info
*pci_info
= to_pci_info(isci_host
->pdev
);
350 isci_timer_list_construct(isci_host
);
352 spin_lock_init(&isci_host
->state_lock
);
353 spin_lock_init(&isci_host
->scic_lock
);
354 spin_lock_init(&isci_host
->queue_lock
);
355 init_waitqueue_head(&isci_host
->eventq
);
357 isci_host_change_state(isci_host
, isci_starting
);
358 isci_host
->can_queue
= ISCI_CAN_QUEUE_VAL
;
360 status
= scic_controller_construct(&isci_host
->sci
, scu_base(isci_host
),
361 smu_base(isci_host
));
363 if (status
!= SCI_SUCCESS
) {
364 dev_err(&isci_host
->pdev
->dev
,
365 "%s: scic_controller_construct failed - status = %x\n",
371 isci_host
->sas_ha
.dev
= &isci_host
->pdev
->dev
;
372 isci_host
->sas_ha
.lldd_ha
= isci_host
;
375 * grab initial values stored in the controller object for OEM and USER
378 isci_user_parameters_get(isci_host
, &scic_user_params
);
379 status
= scic_user_parameters_set(&isci_host
->sci
,
381 if (status
!= SCI_SUCCESS
) {
382 dev_warn(&isci_host
->pdev
->dev
,
383 "%s: scic_user_parameters_set failed\n",
388 scic_oem_parameters_get(&isci_host
->sci
, &oem
);
390 /* grab any OEM parameters specified in orom */
391 if (pci_info
->orom
) {
392 status
= isci_parse_oem_parameters(&oem
,
395 if (status
!= SCI_SUCCESS
) {
396 dev_warn(&isci_host
->pdev
->dev
,
397 "parsing firmware oem parameters failed\n");
402 status
= scic_oem_parameters_set(&isci_host
->sci
, &oem
);
403 if (status
!= SCI_SUCCESS
) {
404 dev_warn(&isci_host
->pdev
->dev
,
405 "%s: scic_oem_parameters_set failed\n",
410 tasklet_init(&isci_host
->completion_tasklet
,
411 isci_host_completion_routine
, (unsigned long)isci_host
);
413 INIT_LIST_HEAD(&isci_host
->requests_to_complete
);
414 INIT_LIST_HEAD(&isci_host
->requests_to_errorback
);
416 spin_lock_irq(&isci_host
->scic_lock
);
417 status
= scic_controller_initialize(&isci_host
->sci
);
418 spin_unlock_irq(&isci_host
->scic_lock
);
419 if (status
!= SCI_SUCCESS
) {
420 dev_warn(&isci_host
->pdev
->dev
,
421 "%s: scic_controller_initialize failed -"
427 err
= scic_controller_mem_init(&isci_host
->sci
);
432 * keep the pool alloc size around, will use it for a bounds checking
433 * when trying to convert virtual addresses to physical addresses
435 isci_host
->dma_pool_alloc_size
= sizeof(struct isci_request
) +
436 scic_io_request_get_object_size();
437 isci_host
->dma_pool
= dmam_pool_create(DRV_NAME
, &isci_host
->pdev
->dev
,
438 isci_host
->dma_pool_alloc_size
,
439 SLAB_HWCACHE_ALIGN
, 0);
441 if (!isci_host
->dma_pool
)
444 for (i
= 0; i
< SCI_MAX_PORTS
; i
++)
445 isci_port_init(&isci_host
->ports
[i
], isci_host
, i
);
447 for (i
= 0; i
< SCI_MAX_PHYS
; i
++)
448 isci_phy_init(&isci_host
->phys
[i
], isci_host
, i
);
450 for (i
= 0; i
< SCI_MAX_REMOTE_DEVICES
; i
++) {
451 struct isci_remote_device
*idev
= &isci_host
->devices
[i
];
453 INIT_LIST_HEAD(&idev
->reqs_in_process
);
454 INIT_LIST_HEAD(&idev
->node
);
455 spin_lock_init(&idev
->state_lock
);