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1 /*
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.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *
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.
12 *
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.
17 *
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.
23 *
24 * BSD LICENSE
25 *
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 *
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
38 * distribution.
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.
42 *
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.
54 */
55
56 #include <linux/kernel.h>
57 #include <linux/init.h>
58 #include <linux/module.h>
59 #include <linux/firmware.h>
60 #include <linux/efi.h>
61 #include <asm/string.h>
62 #include <scsi/scsi_host.h>
63 #include "host.h"
64 #include "isci.h"
65 #include "task.h"
66 #include "probe_roms.h"
67
68 #define MAJ 1
69 #define MIN 2
70 #define BUILD 0
71 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
72 __stringify(BUILD)
73
74 MODULE_VERSION(DRV_VERSION);
75
76 static struct scsi_transport_template *isci_transport_template;
77
78 static const struct pci_device_id isci_id_table[] = {
79 { PCI_VDEVICE(INTEL, 0x1D61),},
80 { PCI_VDEVICE(INTEL, 0x1D63),},
81 { PCI_VDEVICE(INTEL, 0x1D65),},
82 { PCI_VDEVICE(INTEL, 0x1D67),},
83 { PCI_VDEVICE(INTEL, 0x1D69),},
84 { PCI_VDEVICE(INTEL, 0x1D6B),},
85 { PCI_VDEVICE(INTEL, 0x1D60),},
86 { PCI_VDEVICE(INTEL, 0x1D62),},
87 { PCI_VDEVICE(INTEL, 0x1D64),},
88 { PCI_VDEVICE(INTEL, 0x1D66),},
89 { PCI_VDEVICE(INTEL, 0x1D68),},
90 { PCI_VDEVICE(INTEL, 0x1D6A),},
91 {}
92 };
93
94 MODULE_DEVICE_TABLE(pci, isci_id_table);
95
96 /* linux isci specific settings */
97
98 unsigned char no_outbound_task_to = 2;
99 module_param(no_outbound_task_to, byte, 0);
100 MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
101
102 u16 ssp_max_occ_to = 20;
103 module_param(ssp_max_occ_to, ushort, 0);
104 MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
105
106 u16 stp_max_occ_to = 5;
107 module_param(stp_max_occ_to, ushort, 0);
108 MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
109
110 u16 ssp_inactive_to = 5;
111 module_param(ssp_inactive_to, ushort, 0);
112 MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
113
114 u16 stp_inactive_to = 5;
115 module_param(stp_inactive_to, ushort, 0);
116 MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
117
118 unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED;
119 module_param(phy_gen, byte, 0);
120 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
121
122 unsigned char max_concurr_spinup;
123 module_param(max_concurr_spinup, byte, 0);
124 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
125
126 uint cable_selection_override = CABLE_OVERRIDE_DISABLED;
127 module_param(cable_selection_override, uint, 0);
128
129 MODULE_PARM_DESC(cable_selection_override,
130 "This field indicates length of the SAS/SATA cable between "
131 "host and device. If any bits > 15 are set (default) "
132 "indicates \"use platform defaults\"");
133
134 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
135 {
136 struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
137 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
138 struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
139
140 return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
141 }
142
143 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
144
145 struct device_attribute *isci_host_attrs[] = {
146 &dev_attr_isci_id,
147 NULL
148 };
149
150 static struct scsi_host_template isci_sht = {
151
152 .module = THIS_MODULE,
153 .name = DRV_NAME,
154 .proc_name = DRV_NAME,
155 .queuecommand = sas_queuecommand,
156 .target_alloc = sas_target_alloc,
157 .slave_configure = sas_slave_configure,
158 .scan_finished = isci_host_scan_finished,
159 .scan_start = isci_host_start,
160 .change_queue_depth = sas_change_queue_depth,
161 .bios_param = sas_bios_param,
162 .can_queue = ISCI_CAN_QUEUE_VAL,
163 .this_id = -1,
164 .sg_tablesize = SG_ALL,
165 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
166 .use_clustering = ENABLE_CLUSTERING,
167 .eh_abort_handler = sas_eh_abort_handler,
168 .eh_device_reset_handler = sas_eh_device_reset_handler,
169 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
170 .target_destroy = sas_target_destroy,
171 .ioctl = sas_ioctl,
172 .shost_attrs = isci_host_attrs,
173 .use_blk_tags = 1,
174 .track_queue_depth = 1,
175 };
176
177 static struct sas_domain_function_template isci_transport_ops = {
178
179 /* The class calls these to notify the LLDD of an event. */
180 .lldd_port_formed = isci_port_formed,
181 .lldd_port_deformed = isci_port_deformed,
182
183 /* The class calls these when a device is found or gone. */
184 .lldd_dev_found = isci_remote_device_found,
185 .lldd_dev_gone = isci_remote_device_gone,
186
187 .lldd_execute_task = isci_task_execute_task,
188 /* Task Management Functions. Must be called from process context. */
189 .lldd_abort_task = isci_task_abort_task,
190 .lldd_abort_task_set = isci_task_abort_task_set,
191 .lldd_clear_aca = isci_task_clear_aca,
192 .lldd_clear_task_set = isci_task_clear_task_set,
193 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
194 .lldd_lu_reset = isci_task_lu_reset,
195 .lldd_query_task = isci_task_query_task,
196
197 /* ata recovery called from ata-eh */
198 .lldd_ata_check_ready = isci_ata_check_ready,
199
200 /* Port and Adapter management */
201 .lldd_clear_nexus_port = isci_task_clear_nexus_port,
202 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
203
204 /* Phy management */
205 .lldd_control_phy = isci_phy_control,
206
207 /* GPIO support */
208 .lldd_write_gpio = isci_gpio_write,
209 };
210
211
212 /******************************************************************************
213 * P R O T E C T E D M E T H O D S
214 ******************************************************************************/
215
216
217
218 /**
219 * isci_register_sas_ha() - This method initializes various lldd
220 * specific members of the sas_ha struct and calls the libsas
221 * sas_register_ha() function.
222 * @isci_host: This parameter specifies the lldd specific wrapper for the
223 * libsas sas_ha struct.
224 *
225 * This method returns an error code indicating success or failure. The user
226 * should check for possible memory allocation error return otherwise, a zero
227 * indicates success.
228 */
229 static int isci_register_sas_ha(struct isci_host *isci_host)
230 {
231 int i;
232 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
233 struct asd_sas_phy **sas_phys;
234 struct asd_sas_port **sas_ports;
235
236 sas_phys = devm_kzalloc(&isci_host->pdev->dev,
237 SCI_MAX_PHYS * sizeof(void *),
238 GFP_KERNEL);
239 if (!sas_phys)
240 return -ENOMEM;
241
242 sas_ports = devm_kzalloc(&isci_host->pdev->dev,
243 SCI_MAX_PORTS * sizeof(void *),
244 GFP_KERNEL);
245 if (!sas_ports)
246 return -ENOMEM;
247
248 sas_ha->sas_ha_name = DRV_NAME;
249 sas_ha->lldd_module = THIS_MODULE;
250 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
251
252 for (i = 0; i < SCI_MAX_PHYS; i++) {
253 sas_phys[i] = &isci_host->phys[i].sas_phy;
254 sas_ports[i] = &isci_host->sas_ports[i];
255 }
256
257 sas_ha->sas_phy = sas_phys;
258 sas_ha->sas_port = sas_ports;
259 sas_ha->num_phys = SCI_MAX_PHYS;
260
261 sas_ha->strict_wide_ports = 1;
262
263 sas_register_ha(sas_ha);
264
265 return 0;
266 }
267
268 static void isci_unregister(struct isci_host *isci_host)
269 {
270 struct Scsi_Host *shost;
271
272 if (!isci_host)
273 return;
274
275 sas_unregister_ha(&isci_host->sas_ha);
276
277 shost = to_shost(isci_host);
278 sas_remove_host(shost);
279 scsi_remove_host(shost);
280 scsi_host_put(shost);
281 }
282
283 static int isci_pci_init(struct pci_dev *pdev)
284 {
285 int err, bar_num, bar_mask = 0;
286 void __iomem * const *iomap;
287
288 err = pcim_enable_device(pdev);
289 if (err) {
290 dev_err(&pdev->dev,
291 "failed enable PCI device %s!\n",
292 pci_name(pdev));
293 return err;
294 }
295
296 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
297 bar_mask |= 1 << (bar_num * 2);
298
299 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
300 if (err)
301 return err;
302
303 iomap = pcim_iomap_table(pdev);
304 if (!iomap)
305 return -ENOMEM;
306
307 pci_set_master(pdev);
308
309 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
310 if (err) {
311 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
312 if (err)
313 return err;
314 }
315
316 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
317 if (err) {
318 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
319 if (err)
320 return err;
321 }
322
323 return 0;
324 }
325
326 static int num_controllers(struct pci_dev *pdev)
327 {
328 /* bar size alone can tell us if we are running with a dual controller
329 * part, no need to trust revision ids that might be under broken firmware
330 * control
331 */
332 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
333 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
334
335 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
336 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
337 return SCI_MAX_CONTROLLERS;
338 else
339 return 1;
340 }
341
342 static int isci_setup_interrupts(struct pci_dev *pdev)
343 {
344 int err, i, num_msix;
345 struct isci_host *ihost;
346 struct isci_pci_info *pci_info = to_pci_info(pdev);
347
348 /*
349 * Determine the number of vectors associated with this
350 * PCI function.
351 */
352 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
353
354 for (i = 0; i < num_msix; i++)
355 pci_info->msix_entries[i].entry = i;
356
357 err = pci_enable_msix_exact(pdev, pci_info->msix_entries, num_msix);
358 if (err)
359 goto intx;
360
361 for (i = 0; i < num_msix; i++) {
362 int id = i / SCI_NUM_MSI_X_INT;
363 struct msix_entry *msix = &pci_info->msix_entries[i];
364 irq_handler_t isr;
365
366 ihost = pci_info->hosts[id];
367 /* odd numbered vectors are error interrupts */
368 if (i & 1)
369 isr = isci_error_isr;
370 else
371 isr = isci_msix_isr;
372
373 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
374 DRV_NAME"-msix", ihost);
375 if (!err)
376 continue;
377
378 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
379 while (i--) {
380 id = i / SCI_NUM_MSI_X_INT;
381 ihost = pci_info->hosts[id];
382 msix = &pci_info->msix_entries[i];
383 devm_free_irq(&pdev->dev, msix->vector, ihost);
384 }
385 pci_disable_msix(pdev);
386 goto intx;
387 }
388 return 0;
389
390 intx:
391 for_each_isci_host(i, ihost, pdev) {
392 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
393 IRQF_SHARED, DRV_NAME"-intx", ihost);
394 if (err)
395 break;
396 }
397 return err;
398 }
399
400 static void isci_user_parameters_get(struct sci_user_parameters *u)
401 {
402 int i;
403
404 for (i = 0; i < SCI_MAX_PHYS; i++) {
405 struct sci_phy_user_params *u_phy = &u->phys[i];
406
407 u_phy->max_speed_generation = phy_gen;
408
409 /* we are not exporting these for now */
410 u_phy->align_insertion_frequency = 0x7f;
411 u_phy->in_connection_align_insertion_frequency = 0xff;
412 u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
413 }
414
415 u->stp_inactivity_timeout = stp_inactive_to;
416 u->ssp_inactivity_timeout = ssp_inactive_to;
417 u->stp_max_occupancy_timeout = stp_max_occ_to;
418 u->ssp_max_occupancy_timeout = ssp_max_occ_to;
419 u->no_outbound_task_timeout = no_outbound_task_to;
420 u->max_concurr_spinup = max_concurr_spinup;
421 }
422
423 static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
424 struct sci_user_parameters *sci_parms)
425 {
426 u16 index;
427
428 /*
429 * Validate the user parameters. If they are not legal, then
430 * return a failure.
431 */
432 for (index = 0; index < SCI_MAX_PHYS; index++) {
433 struct sci_phy_user_params *u;
434
435 u = &sci_parms->phys[index];
436
437 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) &&
438 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED)))
439 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
440
441 if (u->in_connection_align_insertion_frequency < 3)
442 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
443
444 if ((u->in_connection_align_insertion_frequency < 3) ||
445 (u->align_insertion_frequency == 0) ||
446 (u->notify_enable_spin_up_insertion_frequency == 0))
447 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
448 }
449
450 if ((sci_parms->stp_inactivity_timeout == 0) ||
451 (sci_parms->ssp_inactivity_timeout == 0) ||
452 (sci_parms->stp_max_occupancy_timeout == 0) ||
453 (sci_parms->ssp_max_occupancy_timeout == 0) ||
454 (sci_parms->no_outbound_task_timeout == 0))
455 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
456
457 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
458
459 return SCI_SUCCESS;
460 }
461
462 static void sci_oem_defaults(struct isci_host *ihost)
463 {
464 /* these defaults are overridden by the platform / firmware */
465 struct sci_user_parameters *user = &ihost->user_parameters;
466 struct sci_oem_params *oem = &ihost->oem_parameters;
467 int i;
468
469 /* Default to APC mode. */
470 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
471
472 /* Default to APC mode. */
473 oem->controller.max_concurr_spin_up = 1;
474
475 /* Default to no SSC operation. */
476 oem->controller.do_enable_ssc = false;
477
478 /* Default to short cables on all phys. */
479 oem->controller.cable_selection_mask = 0;
480
481 /* Initialize all of the port parameter information to narrow ports. */
482 for (i = 0; i < SCI_MAX_PORTS; i++)
483 oem->ports[i].phy_mask = 0;
484
485 /* Initialize all of the phy parameter information. */
486 for (i = 0; i < SCI_MAX_PHYS; i++) {
487 /* Default to 3G (i.e. Gen 2). */
488 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED;
489
490 /* the frequencies cannot be 0 */
491 user->phys[i].align_insertion_frequency = 0x7f;
492 user->phys[i].in_connection_align_insertion_frequency = 0xff;
493 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33;
494
495 /* Previous Vitesse based expanders had a arbitration issue that
496 * is worked around by having the upper 32-bits of SAS address
497 * with a value greater then the Vitesse company identifier.
498 * Hence, usage of 0x5FCFFFFF.
499 */
500 oem->phys[i].sas_address.low = 0x1 + ihost->id;
501 oem->phys[i].sas_address.high = 0x5FCFFFFF;
502 }
503
504 user->stp_inactivity_timeout = 5;
505 user->ssp_inactivity_timeout = 5;
506 user->stp_max_occupancy_timeout = 5;
507 user->ssp_max_occupancy_timeout = 20;
508 user->no_outbound_task_timeout = 2;
509 }
510
511 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
512 {
513 struct isci_orom *orom = to_pci_info(pdev)->orom;
514 struct sci_user_parameters sci_user_params;
515 u8 oem_version = ISCI_ROM_VER_1_0;
516 struct isci_host *ihost;
517 struct Scsi_Host *shost;
518 int err, i;
519
520 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL);
521 if (!ihost)
522 return NULL;
523
524 ihost->pdev = pdev;
525 ihost->id = id;
526 spin_lock_init(&ihost->scic_lock);
527 init_waitqueue_head(&ihost->eventq);
528 ihost->sas_ha.dev = &ihost->pdev->dev;
529 ihost->sas_ha.lldd_ha = ihost;
530 tasklet_init(&ihost->completion_tasklet,
531 isci_host_completion_routine, (unsigned long)ihost);
532
533 /* validate module parameters */
534 /* TODO: kill struct sci_user_parameters and reference directly */
535 sci_oem_defaults(ihost);
536 isci_user_parameters_get(&sci_user_params);
537 if (sci_user_parameters_set(ihost, &sci_user_params)) {
538 dev_warn(&pdev->dev,
539 "%s: sci_user_parameters_set failed\n", __func__);
540 return NULL;
541 }
542
543 /* sanity check platform (or 'firmware') oem parameters */
544 if (orom) {
545 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) {
546 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n");
547 return NULL;
548 }
549 ihost->oem_parameters = orom->ctrl[id];
550 oem_version = orom->hdr.version;
551 }
552
553 /* validate oem parameters (platform, firmware, or built-in defaults) */
554 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) {
555 dev_warn(&pdev->dev, "oem parameter validation failed\n");
556 return NULL;
557 }
558
559 for (i = 0; i < SCI_MAX_PORTS; i++) {
560 struct isci_port *iport = &ihost->ports[i];
561
562 INIT_LIST_HEAD(&iport->remote_dev_list);
563 iport->isci_host = ihost;
564 }
565
566 for (i = 0; i < SCI_MAX_PHYS; i++)
567 isci_phy_init(&ihost->phys[i], ihost, i);
568
569 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
570 struct isci_remote_device *idev = &ihost->devices[i];
571
572 INIT_LIST_HEAD(&idev->node);
573 }
574
575 shost = scsi_host_alloc(&isci_sht, sizeof(void *));
576 if (!shost)
577 return NULL;
578
579 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
580 "{%s, %s, %s, %s}\n",
581 (is_cable_select_overridden() ? "* " : ""), ihost->id,
582 lookup_cable_names(decode_cable_selection(ihost, 3)),
583 lookup_cable_names(decode_cable_selection(ihost, 2)),
584 lookup_cable_names(decode_cable_selection(ihost, 1)),
585 lookup_cable_names(decode_cable_selection(ihost, 0)));
586
587 err = isci_host_init(ihost);
588 if (err)
589 goto err_shost;
590
591 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha;
592 ihost->sas_ha.core.shost = shost;
593 shost->transportt = isci_transport_template;
594
595 shost->max_id = ~0;
596 shost->max_lun = ~0;
597 shost->max_cmd_len = MAX_COMMAND_SIZE;
598
599 err = scsi_add_host(shost, &pdev->dev);
600 if (err)
601 goto err_shost;
602
603 err = isci_register_sas_ha(ihost);
604 if (err)
605 goto err_shost_remove;
606
607 return ihost;
608
609 err_shost_remove:
610 scsi_remove_host(shost);
611 err_shost:
612 scsi_host_put(shost);
613
614 return NULL;
615 }
616
617 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
618 {
619 struct isci_pci_info *pci_info;
620 int err, i;
621 struct isci_host *isci_host;
622 const struct firmware *fw = NULL;
623 struct isci_orom *orom = NULL;
624 char *source = "(platform)";
625
626 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
627 pdev->revision);
628
629 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
630 if (!pci_info)
631 return -ENOMEM;
632 pci_set_drvdata(pdev, pci_info);
633
634 if (efi_enabled(EFI_RUNTIME_SERVICES))
635 orom = isci_get_efi_var(pdev);
636
637 if (!orom)
638 orom = isci_request_oprom(pdev);
639
640 for (i = 0; orom && i < num_controllers(pdev); i++) {
641 if (sci_oem_parameters_validate(&orom->ctrl[i],
642 orom->hdr.version)) {
643 dev_warn(&pdev->dev,
644 "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
645 orom = NULL;
646 break;
647 }
648 }
649
650 if (!orom) {
651 source = "(firmware)";
652 orom = isci_request_firmware(pdev, fw);
653 if (!orom) {
654 /* TODO convert this to WARN_TAINT_ONCE once the
655 * orom/efi parameter support is widely available
656 */
657 dev_warn(&pdev->dev,
658 "Loading user firmware failed, using default "
659 "values\n");
660 dev_warn(&pdev->dev,
661 "Default OEM configuration being used: 4 "
662 "narrow ports, and default SAS Addresses\n");
663 }
664 }
665
666 if (orom)
667 dev_info(&pdev->dev,
668 "OEM SAS parameters (version: %u.%u) loaded %s\n",
669 (orom->hdr.version & 0xf0) >> 4,
670 (orom->hdr.version & 0xf), source);
671
672 pci_info->orom = orom;
673
674 err = isci_pci_init(pdev);
675 if (err)
676 return err;
677
678 for (i = 0; i < num_controllers(pdev); i++) {
679 struct isci_host *h = isci_host_alloc(pdev, i);
680
681 if (!h) {
682 err = -ENOMEM;
683 goto err_host_alloc;
684 }
685 pci_info->hosts[i] = h;
686
687 /* turn on DIF support */
688 scsi_host_set_prot(to_shost(h),
689 SHOST_DIF_TYPE1_PROTECTION |
690 SHOST_DIF_TYPE2_PROTECTION |
691 SHOST_DIF_TYPE3_PROTECTION);
692 scsi_host_set_guard(to_shost(h), SHOST_DIX_GUARD_CRC);
693 }
694
695 err = isci_setup_interrupts(pdev);
696 if (err)
697 goto err_host_alloc;
698
699 for_each_isci_host(i, isci_host, pdev)
700 scsi_scan_host(to_shost(isci_host));
701
702 return 0;
703
704 err_host_alloc:
705 for_each_isci_host(i, isci_host, pdev)
706 isci_unregister(isci_host);
707 return err;
708 }
709
710 static void isci_pci_remove(struct pci_dev *pdev)
711 {
712 struct isci_host *ihost;
713 int i;
714
715 for_each_isci_host(i, ihost, pdev) {
716 wait_for_start(ihost);
717 isci_unregister(ihost);
718 isci_host_deinit(ihost);
719 }
720 }
721
722 #ifdef CONFIG_PM_SLEEP
723 static int isci_suspend(struct device *dev)
724 {
725 struct pci_dev *pdev = to_pci_dev(dev);
726 struct isci_host *ihost;
727 int i;
728
729 for_each_isci_host(i, ihost, pdev) {
730 sas_suspend_ha(&ihost->sas_ha);
731 isci_host_deinit(ihost);
732 }
733
734 pci_save_state(pdev);
735 pci_disable_device(pdev);
736 pci_set_power_state(pdev, PCI_D3hot);
737
738 return 0;
739 }
740
741 static int isci_resume(struct device *dev)
742 {
743 struct pci_dev *pdev = to_pci_dev(dev);
744 struct isci_host *ihost;
745 int rc, i;
746
747 pci_set_power_state(pdev, PCI_D0);
748 pci_restore_state(pdev);
749
750 rc = pcim_enable_device(pdev);
751 if (rc) {
752 dev_err(&pdev->dev,
753 "enabling device failure after resume(%d)\n", rc);
754 return rc;
755 }
756
757 pci_set_master(pdev);
758
759 for_each_isci_host(i, ihost, pdev) {
760 sas_prep_resume_ha(&ihost->sas_ha);
761
762 isci_host_init(ihost);
763 isci_host_start(ihost->sas_ha.core.shost);
764 wait_for_start(ihost);
765
766 sas_resume_ha(&ihost->sas_ha);
767 }
768
769 return 0;
770 }
771 #endif
772
773 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
774
775 static struct pci_driver isci_pci_driver = {
776 .name = DRV_NAME,
777 .id_table = isci_id_table,
778 .probe = isci_pci_probe,
779 .remove = isci_pci_remove,
780 .driver.pm = &isci_pm_ops,
781 };
782
783 static __init int isci_init(void)
784 {
785 int err;
786
787 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
788 DRV_NAME, DRV_VERSION);
789
790 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
791 if (!isci_transport_template)
792 return -ENOMEM;
793
794 err = pci_register_driver(&isci_pci_driver);
795 if (err)
796 sas_release_transport(isci_transport_template);
797
798 return err;
799 }
800
801 static __exit void isci_exit(void)
802 {
803 pci_unregister_driver(&isci_pci_driver);
804 sas_release_transport(isci_transport_template);
805 }
806
807 MODULE_LICENSE("Dual BSD/GPL");
808 MODULE_FIRMWARE(ISCI_FW_NAME);
809 module_init(isci_init);
810 module_exit(isci_exit);