summaryrefslogtreecommitdiff
path: root/drivers/scsi/isci/host.c
blob: aa86615fa7a99ec2c7f93729d7fc69532361bd27 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "isci.h"
#include "scic_io_request.h"
#include "scic_remote_device.h"
#include "scic_port.h"

#include "port.h"
#include "request.h"
#include "host.h"

irqreturn_t isci_msix_isr(int vec, void *data)
{
	struct isci_host *ihost = data;
	struct scic_sds_controller *scic = ihost->core_controller;

	if (scic_sds_controller_isr(scic))
		tasklet_schedule(&ihost->completion_tasklet);

	return IRQ_HANDLED;
}

irqreturn_t isci_intx_isr(int vec, void *data)
{
	struct pci_dev *pdev = data;
	struct isci_host *ihost;
	irqreturn_t ret = IRQ_NONE;

	for_each_isci_host(ihost, pdev) {
		struct scic_sds_controller *scic = ihost->core_controller;

		if (scic_sds_controller_isr(scic)) {
			tasklet_schedule(&ihost->completion_tasklet);
			ret = IRQ_HANDLED;
		} else if (scic_sds_controller_error_isr(scic)) {
			spin_lock(&ihost->scic_lock);
			scic_sds_controller_error_handler(scic);
			spin_unlock(&ihost->scic_lock);
			ret = IRQ_HANDLED;
		}
	}

	return ret;
}

irqreturn_t isci_error_isr(int vec, void *data)
{
	struct isci_host *ihost = data;
	struct scic_sds_controller *scic = ihost->core_controller;

	if (scic_sds_controller_error_isr(scic))
		scic_sds_controller_error_handler(scic);

	return IRQ_HANDLED;
}

/**
 * isci_host_start_complete() - This function is called by the core library,
 *    through the ISCI Module, to indicate controller start status.
 * @isci_host: This parameter specifies the ISCI host object
 * @completion_status: This parameter specifies the completion status from the
 *    core library.
 *
 */
void isci_host_start_complete(struct isci_host *ihost, enum sci_status completion_status)
{
	if (completion_status != SCI_SUCCESS)
		dev_info(&ihost->pdev->dev,
			"controller start timed out, continuing...\n");
	isci_host_change_state(ihost, isci_ready);
	clear_bit(IHOST_START_PENDING, &ihost->flags);
	wake_up(&ihost->eventq);
}

int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
	struct isci_host *ihost = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));

	if (test_bit(IHOST_START_PENDING, &ihost->flags))
		return 0;

	/* todo: use sas_flush_discovery once it is upstream */
	scsi_flush_work(shost);

	scsi_flush_work(shost);

	dev_dbg(&ihost->pdev->dev,
		"%s: ihost->status = %d, time = %ld\n",
		 __func__, isci_host_get_state(ihost), time);

	return 1;

}

void isci_host_scan_start(struct Scsi_Host *shost)
{
	struct isci_host *ihost = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
	struct scic_sds_controller *scic = ihost->core_controller;
	unsigned long tmo = scic_controller_get_suggested_start_timeout(scic);

	set_bit(IHOST_START_PENDING, &ihost->flags);

	spin_lock_irq(&ihost->scic_lock);
	scic_controller_start(scic, tmo);
	scic_controller_enable_interrupts(scic);
	spin_unlock_irq(&ihost->scic_lock);
}

void isci_host_stop_complete(struct isci_host *ihost, enum sci_status completion_status)
{
	isci_host_change_state(ihost, isci_stopped);
	scic_controller_disable_interrupts(ihost->core_controller);
	clear_bit(IHOST_STOP_PENDING, &ihost->flags);
	wake_up(&ihost->eventq);
}

static struct coherent_memory_info *isci_host_alloc_mdl_struct(
	struct isci_host *isci_host,
	u32 size)
{
	struct coherent_memory_info *mdl_struct;
	void *uncached_address = NULL;


	mdl_struct = devm_kzalloc(&isci_host->pdev->dev,
				  sizeof(*mdl_struct),
				  GFP_KERNEL);
	if (!mdl_struct)
		return NULL;

	INIT_LIST_HEAD(&mdl_struct->node);

	uncached_address = dmam_alloc_coherent(&isci_host->pdev->dev,
					       size,
					       &mdl_struct->dma_handle,
					       GFP_KERNEL);
	if (!uncached_address)
		return NULL;

	/* memset the whole memory area. */
	memset((char *)uncached_address, 0, size);
	mdl_struct->vaddr = uncached_address;
	mdl_struct->size = (size_t)size;

	return mdl_struct;
}

static void isci_host_build_mde(
	struct sci_physical_memory_descriptor *mde_struct,
	struct coherent_memory_info *mdl_struct)
{
	unsigned long address = 0;
	dma_addr_t dma_addr = 0;

	address = (unsigned long)mdl_struct->vaddr;
	dma_addr = mdl_struct->dma_handle;

	/* to satisfy the alignment. */
	if ((address % mde_struct->constant_memory_alignment) != 0) {
		int align_offset
			= (mde_struct->constant_memory_alignment
			   - (address % mde_struct->constant_memory_alignment));
		address += align_offset;
		dma_addr += align_offset;
	}

	mde_struct->virtual_address = (void *)address;
	mde_struct->physical_address = dma_addr;
	mdl_struct->mde = mde_struct;
}

static int isci_host_mdl_allocate_coherent(
	struct isci_host *isci_host)
{
	struct sci_physical_memory_descriptor *current_mde;
	struct coherent_memory_info *mdl_struct;
	u32 size = 0;

	struct sci_base_memory_descriptor_list *mdl_handle
		= sci_controller_get_memory_descriptor_list_handle(
		isci_host->core_controller);

	sci_mdl_first_entry(mdl_handle);

	current_mde = sci_mdl_get_current_entry(mdl_handle);

	while (current_mde != NULL) {

		size = (current_mde->constant_memory_size
			+ current_mde->constant_memory_alignment);

		mdl_struct = isci_host_alloc_mdl_struct(isci_host, size);
		if (!mdl_struct)
			return -ENOMEM;

		list_add_tail(&mdl_struct->node, &isci_host->mdl_struct_list);

		isci_host_build_mde(current_mde, mdl_struct);

		sci_mdl_next_entry(mdl_handle);
		current_mde = sci_mdl_get_current_entry(mdl_handle);
	}

	return 0;
}


/**
 * isci_host_completion_routine() - This function is the delayed service
 *    routine that calls the sci core library's completion handler. It's
 *    scheduled as a tasklet from the interrupt service routine when interrupts
 *    in use, or set as the timeout function in polled mode.
 * @data: This parameter specifies the ISCI host object
 *
 */
static void isci_host_completion_routine(unsigned long data)
{
	struct isci_host *isci_host = (struct isci_host *)data;
	struct list_head completed_request_list;
	struct list_head aborted_request_list;
	struct list_head *current_position;
	struct list_head *next_position;
	struct isci_request *request;
	struct isci_request *next_request;
	struct sas_task *task;

	INIT_LIST_HEAD(&completed_request_list);
	INIT_LIST_HEAD(&aborted_request_list);

	spin_lock_irq(&isci_host->scic_lock);

	scic_sds_controller_completion_handler(isci_host->core_controller);

	/* Take the lists of completed I/Os from the host. */
	list_splice_init(&isci_host->requests_to_complete,
			 &completed_request_list);

	list_splice_init(&isci_host->requests_to_abort,
			 &aborted_request_list);

	spin_unlock_irq(&isci_host->scic_lock);

	/* Process any completions in the lists. */
	list_for_each_safe(current_position, next_position,
			   &completed_request_list) {

		request = list_entry(current_position, struct isci_request,
				     completed_node);
		task = isci_request_access_task(request);

		/* Normal notification (task_done) */
		dev_dbg(&isci_host->pdev->dev,
			"%s: Normal - request/task = %p/%p\n",
			__func__,
			request,
			task);

		task->task_done(task);
		task->lldd_task = NULL;

		/* Free the request object. */
		isci_request_free(isci_host, request);
	}
	list_for_each_entry_safe(request, next_request, &aborted_request_list,
				 completed_node) {

		task = isci_request_access_task(request);

		/* Use sas_task_abort */
		dev_warn(&isci_host->pdev->dev,
			 "%s: Error - request/task = %p/%p\n",
			 __func__,
			 request,
			 task);

		/* Put the task into the abort path. */
		sas_task_abort(task);
	}

}

void isci_host_deinit(struct isci_host *ihost)
{
	struct scic_sds_controller *scic = ihost->core_controller;
	int i;

	isci_host_change_state(ihost, isci_stopping);
	for (i = 0; i < SCI_MAX_PORTS; i++) {
		struct isci_port *port = &ihost->isci_ports[i];
		struct isci_remote_device *idev, *d;

		list_for_each_entry_safe(idev, d, &port->remote_dev_list, node) {
			isci_remote_device_change_state(idev, isci_stopping);
			isci_remote_device_stop(idev);
		}
	}

	set_bit(IHOST_STOP_PENDING, &ihost->flags);
	scic_controller_stop(scic, SCIC_CONTROLLER_STOP_TIMEOUT);
	wait_for_stop(ihost);
	scic_controller_reset(scic);
}

static void __iomem *scu_base(struct isci_host *isci_host)
{
	struct pci_dev *pdev = isci_host->pdev;
	int id = isci_host->id;

	return pcim_iomap_table(pdev)[SCI_SCU_BAR * 2] + SCI_SCU_BAR_SIZE * id;
}

static void __iomem *smu_base(struct isci_host *isci_host)
{
	struct pci_dev *pdev = isci_host->pdev;
	int id = isci_host->id;

	return pcim_iomap_table(pdev)[SCI_SMU_BAR * 2] + SCI_SMU_BAR_SIZE * id;
}

#define SCI_MAX_TIMER_COUNT 25

int isci_host_init(struct isci_host *isci_host)
{
	int err = 0;
	int index = 0;
	enum sci_status status;
	struct scic_sds_controller *controller;
	struct scic_sds_port *scic_port;
	union scic_oem_parameters scic_oem_params;
	union scic_user_parameters scic_user_params;

	INIT_LIST_HEAD(&isci_host->timer_list_struct.timers);
	isci_timer_list_construct(
		&isci_host->timer_list_struct,
		SCI_MAX_TIMER_COUNT
		);

	controller = scic_controller_alloc(&isci_host->pdev->dev);

	if (!controller) {
		dev_err(&isci_host->pdev->dev,
			"%s: failed (%d)\n",
			__func__,
			err);
		return -ENOMEM;
	}

	isci_host->core_controller = controller;
	spin_lock_init(&isci_host->state_lock);
	spin_lock_init(&isci_host->scic_lock);
	spin_lock_init(&isci_host->queue_lock);
	init_waitqueue_head(&isci_host->eventq);

	isci_host_change_state(isci_host, isci_starting);
	isci_host->can_queue = ISCI_CAN_QUEUE_VAL;

	status = scic_controller_construct(controller, scu_base(isci_host),
					   smu_base(isci_host));

	if (status != SCI_SUCCESS) {
		dev_err(&isci_host->pdev->dev,
			"%s: scic_controller_construct failed - status = %x\n",
			__func__,
			status);
		return -ENODEV;
	}

	isci_host->sas_ha.dev = &isci_host->pdev->dev;
	isci_host->sas_ha.lldd_ha = isci_host;

	/*----------- SCIC controller Initialization Stuff ------------------
	 * set association host adapter struct in core controller.
	 */
	sci_object_set_association(isci_host->core_controller,
				   (void *)isci_host);

	/* grab initial values stored in the controller object for OEM and USER
	 * parameters */
	scic_oem_parameters_get(controller, &scic_oem_params);
	scic_user_parameters_get(controller, &scic_user_params);

	if (isci_firmware) {
		/* grab any OEM and USER parameters specified in binary blob */
		status = isci_parse_oem_parameters(&scic_oem_params,
						   isci_host->id,
						   isci_firmware);
		if (status != SCI_SUCCESS) {
			dev_warn(&isci_host->pdev->dev,
				 "parsing firmware oem parameters failed\n");
			return -EINVAL;
		}

		status = isci_parse_user_parameters(&scic_user_params,
						    isci_host->id,
						    isci_firmware);
		if (status != SCI_SUCCESS) {
			dev_warn(&isci_host->pdev->dev,
				 "%s: isci_parse_user_parameters"
				 " failed\n", __func__);
			return -EINVAL;
		}
	} else {
		status = scic_oem_parameters_set(isci_host->core_controller,
						 &scic_oem_params);
		if (status != SCI_SUCCESS) {
			dev_warn(&isci_host->pdev->dev,
				 "%s: scic_oem_parameters_set failed\n",
				 __func__);
			return -ENODEV;
		}


		status = scic_user_parameters_set(isci_host->core_controller,
						  &scic_user_params);
		if (status != SCI_SUCCESS) {
			dev_warn(&isci_host->pdev->dev,
				 "%s: scic_user_parameters_set failed\n",
				 __func__);
			return -ENODEV;
		}
	}

	status = scic_controller_initialize(isci_host->core_controller);
	if (status != SCI_SUCCESS) {
		dev_warn(&isci_host->pdev->dev,
			 "%s: scic_controller_initialize failed -"
			 " status = 0x%x\n",
			 __func__, status);
		return -ENODEV;
	}

	tasklet_init(&isci_host->completion_tasklet,
		     isci_host_completion_routine, (unsigned long)isci_host);

	INIT_LIST_HEAD(&(isci_host->mdl_struct_list));

	INIT_LIST_HEAD(&isci_host->requests_to_complete);
	INIT_LIST_HEAD(&isci_host->requests_to_abort);

	/* populate mdl with dma memory. scu_mdl_allocate_coherent() */
	err = isci_host_mdl_allocate_coherent(isci_host);

	if (err)
		return err;

	/*
	 * keep the pool alloc size around, will use it for a bounds checking
	 * when trying to convert virtual addresses to physical addresses
	 */
	isci_host->dma_pool_alloc_size = sizeof(struct isci_request) +
					 scic_io_request_get_object_size();
	isci_host->dma_pool = dmam_pool_create(DRV_NAME, &isci_host->pdev->dev,
					       isci_host->dma_pool_alloc_size,
					       SLAB_HWCACHE_ALIGN, 0);

	if (!isci_host->dma_pool)
		return -ENOMEM;

	for (index = 0; index < SCI_MAX_PORTS; index++)
		isci_port_init(&isci_host->isci_ports[index],
			       isci_host,
			       index);

	for (index = 0; index < SCI_MAX_PHYS; index++)
		isci_phy_init(&isci_host->phys[index], isci_host, index);

	/* Why are we doing this? Is this even necessary? */
	memcpy(&isci_host->sas_addr[0],
	       &isci_host->phys[0].sas_addr[0],
	       SAS_ADDR_SIZE);

	/* Start the ports */
	for (index = 0; index < SCI_MAX_PORTS; index++) {
		scic_controller_get_port_handle(controller, index, &scic_port);
		scic_port_start(scic_port);
	}

	return 0;
}