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 DRV_VERSION "1.2.0"
69
70 MODULE_VERSION(DRV_VERSION);
71
72 static struct scsi_transport_template *isci_transport_template;
73
74 static const struct pci_device_id isci_id_table[] = {
75 { PCI_VDEVICE(INTEL, 0x1D61),},
76 { PCI_VDEVICE(INTEL, 0x1D63),},
77 { PCI_VDEVICE(INTEL, 0x1D65),},
78 { PCI_VDEVICE(INTEL, 0x1D67),},
79 { PCI_VDEVICE(INTEL, 0x1D69),},
80 { PCI_VDEVICE(INTEL, 0x1D6B),},
81 { PCI_VDEVICE(INTEL, 0x1D60),},
82 { PCI_VDEVICE(INTEL, 0x1D62),},
83 { PCI_VDEVICE(INTEL, 0x1D64),},
84 { PCI_VDEVICE(INTEL, 0x1D66),},
85 { PCI_VDEVICE(INTEL, 0x1D68),},
86 { PCI_VDEVICE(INTEL, 0x1D6A),},
87 {}
88 };
89
90 MODULE_DEVICE_TABLE(pci, isci_id_table);
91
92 /* linux isci specific settings */
93
94 unsigned char no_outbound_task_to = 2;
95 module_param(no_outbound_task_to, byte, 0);
96 MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
97
98 u16 ssp_max_occ_to = 20;
99 module_param(ssp_max_occ_to, ushort, 0);
100 MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
101
102 u16 stp_max_occ_to = 5;
103 module_param(stp_max_occ_to, ushort, 0);
104 MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
105
106 u16 ssp_inactive_to = 5;
107 module_param(ssp_inactive_to, ushort, 0);
108 MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
109
110 u16 stp_inactive_to = 5;
111 module_param(stp_inactive_to, ushort, 0);
112 MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
113
114 unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED;
115 module_param(phy_gen, byte, 0);
116 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
117
118 unsigned char max_concurr_spinup;
119 module_param(max_concurr_spinup, byte, 0);
120 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
121
122 uint cable_selection_override = CABLE_OVERRIDE_DISABLED;
123 module_param(cable_selection_override, uint, 0);
124
125 MODULE_PARM_DESC(cable_selection_override,
126 "This field indicates length of the SAS/SATA cable between "
127 "host and device. If any bits > 15 are set (default) "
128 "indicates \"use platform defaults\"");
129
isci_show_id(struct device * dev,struct device_attribute * attr,char * buf)130 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
131 {
132 struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
133 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
134 struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
135
136 return sysfs_emit(buf, "%d\n", ihost->id);
137 }
138
139 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
140
141 static struct attribute *isci_host_attrs[] = {
142 &dev_attr_isci_id.attr,
143 NULL
144 };
145
146 ATTRIBUTE_GROUPS(isci_host);
147
148 static const struct attribute_group *isci_sdev_groups[] = {
149 &sas_ata_sdev_attr_group,
150 NULL
151 };
152
153 static const struct scsi_host_template isci_sht = {
154 LIBSAS_SHT_BASE
155 .scan_finished = isci_host_scan_finished,
156 .scan_start = isci_host_start,
157 .can_queue = ISCI_CAN_QUEUE_VAL,
158 .sg_tablesize = SG_ALL,
159 .eh_abort_handler = sas_eh_abort_handler,
160 .shost_groups = isci_host_groups,
161 .sdev_groups = isci_sdev_groups,
162 .track_queue_depth = 1,
163 };
164
165 static struct sas_domain_function_template isci_transport_ops = {
166
167 /* The class calls these to notify the LLDD of an event. */
168 .lldd_port_formed = isci_port_formed,
169 .lldd_port_deformed = isci_port_deformed,
170
171 /* The class calls these when a device is found or gone. */
172 .lldd_dev_found = isci_remote_device_found,
173 .lldd_dev_gone = isci_remote_device_gone,
174
175 .lldd_execute_task = isci_task_execute_task,
176 /* Task Management Functions. Must be called from process context. */
177 .lldd_abort_task = isci_task_abort_task,
178 .lldd_abort_task_set = isci_task_abort_task_set,
179 .lldd_clear_task_set = isci_task_clear_task_set,
180 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
181 .lldd_lu_reset = isci_task_lu_reset,
182 .lldd_query_task = isci_task_query_task,
183
184 /* ata recovery called from ata-eh */
185 .lldd_ata_check_ready = isci_ata_check_ready,
186
187 /* Port and Adapter management */
188 .lldd_clear_nexus_port = isci_task_clear_nexus_port,
189 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
190
191 /* Phy management */
192 .lldd_control_phy = isci_phy_control,
193
194 /* GPIO support */
195 .lldd_write_gpio = isci_gpio_write,
196 };
197
198
199 /******************************************************************************
200 * P R O T E C T E D M E T H O D S
201 ******************************************************************************/
202
203
204
205 /**
206 * isci_register_sas_ha() - This method initializes various lldd
207 * specific members of the sas_ha struct and calls the libsas
208 * sas_register_ha() function.
209 * @isci_host: This parameter specifies the lldd specific wrapper for the
210 * libsas sas_ha struct.
211 *
212 * This method returns an error code indicating success or failure. The user
213 * should check for possible memory allocation error return otherwise, a zero
214 * indicates success.
215 */
isci_register_sas_ha(struct isci_host * isci_host)216 static int isci_register_sas_ha(struct isci_host *isci_host)
217 {
218 int i;
219 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
220 struct asd_sas_phy **sas_phys;
221 struct asd_sas_port **sas_ports;
222
223 sas_phys = devm_kcalloc(&isci_host->pdev->dev,
224 SCI_MAX_PHYS, sizeof(void *),
225 GFP_KERNEL);
226 if (!sas_phys)
227 return -ENOMEM;
228
229 sas_ports = devm_kcalloc(&isci_host->pdev->dev,
230 SCI_MAX_PORTS, sizeof(void *),
231 GFP_KERNEL);
232 if (!sas_ports)
233 return -ENOMEM;
234
235 sas_ha->sas_ha_name = DRV_NAME;
236 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
237
238 for (i = 0; i < SCI_MAX_PHYS; i++) {
239 sas_phys[i] = &isci_host->phys[i].sas_phy;
240 sas_ports[i] = &isci_host->sas_ports[i];
241 }
242
243 sas_ha->sas_phy = sas_phys;
244 sas_ha->sas_port = sas_ports;
245 sas_ha->num_phys = SCI_MAX_PHYS;
246
247 sas_ha->strict_wide_ports = 1;
248
249 return sas_register_ha(sas_ha);
250 }
251
isci_unregister(struct isci_host * isci_host)252 static void isci_unregister(struct isci_host *isci_host)
253 {
254 struct Scsi_Host *shost;
255
256 if (!isci_host)
257 return;
258
259 shost = to_shost(isci_host);
260 sas_unregister_ha(&isci_host->sas_ha);
261
262 sas_remove_host(shost);
263 scsi_host_put(shost);
264 }
265
isci_pci_init(struct pci_dev * pdev)266 static int isci_pci_init(struct pci_dev *pdev)
267 {
268 int err, bar_num, bar_mask = 0;
269 void __iomem * const *iomap;
270
271 err = pcim_enable_device(pdev);
272 if (err) {
273 dev_err(&pdev->dev,
274 "failed enable PCI device %s!\n",
275 pci_name(pdev));
276 return err;
277 }
278
279 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
280 bar_mask |= 1 << (bar_num * 2);
281
282 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
283 if (err)
284 return err;
285
286 iomap = pcim_iomap_table(pdev);
287 if (!iomap)
288 return -ENOMEM;
289
290 pci_set_master(pdev);
291
292 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
293 if (err)
294 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
295 return err;
296 }
297
num_controllers(struct pci_dev * pdev)298 static int num_controllers(struct pci_dev *pdev)
299 {
300 /* bar size alone can tell us if we are running with a dual controller
301 * part, no need to trust revision ids that might be under broken firmware
302 * control
303 */
304 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
305 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
306
307 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
308 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
309 return SCI_MAX_CONTROLLERS;
310 else
311 return 1;
312 }
313
isci_setup_interrupts(struct pci_dev * pdev)314 static int isci_setup_interrupts(struct pci_dev *pdev)
315 {
316 int err, i, num_msix;
317 struct isci_host *ihost;
318 struct isci_pci_info *pci_info = to_pci_info(pdev);
319
320 /*
321 * Determine the number of vectors associated with this
322 * PCI function.
323 */
324 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
325
326 err = pci_alloc_irq_vectors(pdev, num_msix, num_msix, PCI_IRQ_MSIX);
327 if (err < 0)
328 goto intx;
329
330 for (i = 0; i < num_msix; i++) {
331 int id = i / SCI_NUM_MSI_X_INT;
332 irq_handler_t isr;
333
334 ihost = pci_info->hosts[id];
335 /* odd numbered vectors are error interrupts */
336 if (i & 1)
337 isr = isci_error_isr;
338 else
339 isr = isci_msix_isr;
340
341 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
342 isr, 0, DRV_NAME"-msix", ihost);
343 if (!err)
344 continue;
345
346 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
347 while (i--) {
348 id = i / SCI_NUM_MSI_X_INT;
349 ihost = pci_info->hosts[id];
350 devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
351 ihost);
352 }
353 pci_free_irq_vectors(pdev);
354 goto intx;
355 }
356 return 0;
357
358 intx:
359 for_each_isci_host(i, ihost, pdev) {
360 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, 0),
361 isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx",
362 ihost);
363 if (err)
364 break;
365 }
366 return err;
367 }
368
isci_user_parameters_get(struct sci_user_parameters * u)369 static void isci_user_parameters_get(struct sci_user_parameters *u)
370 {
371 int i;
372
373 for (i = 0; i < SCI_MAX_PHYS; i++) {
374 struct sci_phy_user_params *u_phy = &u->phys[i];
375
376 u_phy->max_speed_generation = phy_gen;
377
378 /* we are not exporting these for now */
379 u_phy->align_insertion_frequency = 0x7f;
380 u_phy->in_connection_align_insertion_frequency = 0xff;
381 u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
382 }
383
384 u->stp_inactivity_timeout = stp_inactive_to;
385 u->ssp_inactivity_timeout = ssp_inactive_to;
386 u->stp_max_occupancy_timeout = stp_max_occ_to;
387 u->ssp_max_occupancy_timeout = ssp_max_occ_to;
388 u->no_outbound_task_timeout = no_outbound_task_to;
389 u->max_concurr_spinup = max_concurr_spinup;
390 }
391
sci_user_parameters_set(struct isci_host * ihost,struct sci_user_parameters * sci_parms)392 static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
393 struct sci_user_parameters *sci_parms)
394 {
395 u16 index;
396
397 /*
398 * Validate the user parameters. If they are not legal, then
399 * return a failure.
400 */
401 for (index = 0; index < SCI_MAX_PHYS; index++) {
402 struct sci_phy_user_params *u;
403
404 u = &sci_parms->phys[index];
405
406 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) &&
407 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED)))
408 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
409
410 if ((u->in_connection_align_insertion_frequency < 3) ||
411 (u->align_insertion_frequency == 0) ||
412 (u->notify_enable_spin_up_insertion_frequency == 0))
413 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
414 }
415
416 if ((sci_parms->stp_inactivity_timeout == 0) ||
417 (sci_parms->ssp_inactivity_timeout == 0) ||
418 (sci_parms->stp_max_occupancy_timeout == 0) ||
419 (sci_parms->ssp_max_occupancy_timeout == 0) ||
420 (sci_parms->no_outbound_task_timeout == 0))
421 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
422
423 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
424
425 return SCI_SUCCESS;
426 }
427
sci_oem_defaults(struct isci_host * ihost)428 static void sci_oem_defaults(struct isci_host *ihost)
429 {
430 /* these defaults are overridden by the platform / firmware */
431 struct sci_user_parameters *user = &ihost->user_parameters;
432 struct sci_oem_params *oem = &ihost->oem_parameters;
433 int i;
434
435 /* Default to APC mode. */
436 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
437
438 /* Default to APC mode. */
439 oem->controller.max_concurr_spin_up = 1;
440
441 /* Default to no SSC operation. */
442 oem->controller.do_enable_ssc = false;
443
444 /* Default to short cables on all phys. */
445 oem->controller.cable_selection_mask = 0;
446
447 /* Initialize all of the port parameter information to narrow ports. */
448 for (i = 0; i < SCI_MAX_PORTS; i++)
449 oem->ports[i].phy_mask = 0;
450
451 /* Initialize all of the phy parameter information. */
452 for (i = 0; i < SCI_MAX_PHYS; i++) {
453 /* Default to 3G (i.e. Gen 2). */
454 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED;
455
456 /* the frequencies cannot be 0 */
457 user->phys[i].align_insertion_frequency = 0x7f;
458 user->phys[i].in_connection_align_insertion_frequency = 0xff;
459 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33;
460
461 /* Previous Vitesse based expanders had a arbitration issue that
462 * is worked around by having the upper 32-bits of SAS address
463 * with a value greater then the Vitesse company identifier.
464 * Hence, usage of 0x5FCFFFFF.
465 */
466 oem->phys[i].sas_address.low = 0x1 + ihost->id;
467 oem->phys[i].sas_address.high = 0x5FCFFFFF;
468 }
469
470 user->stp_inactivity_timeout = 5;
471 user->ssp_inactivity_timeout = 5;
472 user->stp_max_occupancy_timeout = 5;
473 user->ssp_max_occupancy_timeout = 20;
474 user->no_outbound_task_timeout = 2;
475 }
476
isci_host_alloc(struct pci_dev * pdev,int id)477 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
478 {
479 struct isci_orom *orom = to_pci_info(pdev)->orom;
480 struct sci_user_parameters sci_user_params;
481 u8 oem_version = ISCI_ROM_VER_1_0;
482 struct isci_host *ihost;
483 struct Scsi_Host *shost;
484 int err, i;
485
486 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL);
487 if (!ihost)
488 return NULL;
489
490 ihost->pdev = pdev;
491 ihost->id = id;
492 spin_lock_init(&ihost->scic_lock);
493 init_waitqueue_head(&ihost->eventq);
494 ihost->sas_ha.dev = &ihost->pdev->dev;
495 ihost->sas_ha.lldd_ha = ihost;
496 tasklet_init(&ihost->completion_tasklet,
497 isci_host_completion_routine, (unsigned long)ihost);
498
499 /* validate module parameters */
500 /* TODO: kill struct sci_user_parameters and reference directly */
501 sci_oem_defaults(ihost);
502 isci_user_parameters_get(&sci_user_params);
503 if (sci_user_parameters_set(ihost, &sci_user_params)) {
504 dev_warn(&pdev->dev,
505 "%s: sci_user_parameters_set failed\n", __func__);
506 return NULL;
507 }
508
509 /* sanity check platform (or 'firmware') oem parameters */
510 if (orom) {
511 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) {
512 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n");
513 return NULL;
514 }
515 ihost->oem_parameters = orom->ctrl[id];
516 oem_version = orom->hdr.version;
517 }
518
519 /* validate oem parameters (platform, firmware, or built-in defaults) */
520 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) {
521 dev_warn(&pdev->dev, "oem parameter validation failed\n");
522 return NULL;
523 }
524
525 for (i = 0; i < SCI_MAX_PORTS; i++) {
526 struct isci_port *iport = &ihost->ports[i];
527
528 INIT_LIST_HEAD(&iport->remote_dev_list);
529 iport->isci_host = ihost;
530 }
531
532 for (i = 0; i < SCI_MAX_PHYS; i++)
533 isci_phy_init(&ihost->phys[i], ihost, i);
534
535 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
536 struct isci_remote_device *idev = &ihost->devices[i];
537
538 INIT_LIST_HEAD(&idev->node);
539 }
540
541 shost = scsi_host_alloc(&isci_sht, sizeof(void *));
542 if (!shost)
543 return NULL;
544
545 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
546 "{%s, %s, %s, %s}\n",
547 (is_cable_select_overridden() ? "* " : ""), ihost->id,
548 lookup_cable_names(decode_cable_selection(ihost, 3)),
549 lookup_cable_names(decode_cable_selection(ihost, 2)),
550 lookup_cable_names(decode_cable_selection(ihost, 1)),
551 lookup_cable_names(decode_cable_selection(ihost, 0)));
552
553 err = isci_host_init(ihost);
554 if (err)
555 goto err_shost;
556
557 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha;
558 ihost->sas_ha.shost = shost;
559 shost->transportt = isci_transport_template;
560
561 shost->max_id = ~0;
562 shost->max_lun = ~0;
563 shost->max_cmd_len = MAX_COMMAND_SIZE;
564
565 /* turn on DIF support */
566 scsi_host_set_prot(shost,
567 SHOST_DIF_TYPE1_PROTECTION |
568 SHOST_DIF_TYPE2_PROTECTION |
569 SHOST_DIF_TYPE3_PROTECTION);
570 scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
571
572 err = scsi_add_host(shost, &pdev->dev);
573 if (err)
574 goto err_shost;
575
576 err = isci_register_sas_ha(ihost);
577 if (err)
578 goto err_shost_remove;
579
580 return ihost;
581
582 err_shost_remove:
583 scsi_remove_host(shost);
584 err_shost:
585 scsi_host_put(shost);
586
587 return NULL;
588 }
589
isci_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)590 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
591 {
592 struct isci_pci_info *pci_info;
593 int err, i;
594 struct isci_host *isci_host;
595 const struct firmware *fw = NULL;
596 struct isci_orom *orom = NULL;
597 char *source = "(platform)";
598
599 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
600 pdev->revision);
601
602 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
603 if (!pci_info)
604 return -ENOMEM;
605 pci_set_drvdata(pdev, pci_info);
606
607 if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
608 orom = isci_get_efi_var(pdev);
609
610 if (!orom)
611 orom = isci_request_oprom(pdev);
612
613 for (i = 0; orom && i < num_controllers(pdev); i++) {
614 if (sci_oem_parameters_validate(&orom->ctrl[i],
615 orom->hdr.version)) {
616 dev_warn(&pdev->dev,
617 "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
618 orom = NULL;
619 break;
620 }
621 }
622
623 if (!orom) {
624 source = "(firmware)";
625 orom = isci_request_firmware(pdev, fw);
626 if (!orom) {
627 /* TODO convert this to WARN_TAINT_ONCE once the
628 * orom/efi parameter support is widely available
629 */
630 dev_warn(&pdev->dev,
631 "Loading user firmware failed, using default "
632 "values\n");
633 dev_warn(&pdev->dev,
634 "Default OEM configuration being used: 4 "
635 "narrow ports, and default SAS Addresses\n");
636 }
637 }
638
639 if (orom)
640 dev_info(&pdev->dev,
641 "OEM SAS parameters (version: %u.%u) loaded %s\n",
642 (orom->hdr.version & 0xf0) >> 4,
643 (orom->hdr.version & 0xf), source);
644
645 pci_info->orom = orom;
646
647 err = isci_pci_init(pdev);
648 if (err)
649 return err;
650
651 for (i = 0; i < num_controllers(pdev); i++) {
652 struct isci_host *h = isci_host_alloc(pdev, i);
653
654 if (!h) {
655 err = -ENOMEM;
656 goto err_host_alloc;
657 }
658 pci_info->hosts[i] = h;
659 }
660
661 err = isci_setup_interrupts(pdev);
662 if (err)
663 goto err_host_alloc;
664
665 for_each_isci_host(i, isci_host, pdev)
666 scsi_scan_host(to_shost(isci_host));
667
668 return 0;
669
670 err_host_alloc:
671 for_each_isci_host(i, isci_host, pdev)
672 isci_unregister(isci_host);
673 return err;
674 }
675
isci_pci_remove(struct pci_dev * pdev)676 static void isci_pci_remove(struct pci_dev *pdev)
677 {
678 struct isci_host *ihost;
679 int i;
680
681 for_each_isci_host(i, ihost, pdev) {
682 wait_for_start(ihost);
683 isci_unregister(ihost);
684 isci_host_deinit(ihost);
685 }
686 }
687
688 #ifdef CONFIG_PM_SLEEP
isci_suspend(struct device * dev)689 static int isci_suspend(struct device *dev)
690 {
691 struct pci_dev *pdev = to_pci_dev(dev);
692 struct isci_host *ihost;
693 int i;
694
695 for_each_isci_host(i, ihost, pdev) {
696 sas_suspend_ha(&ihost->sas_ha);
697 isci_host_deinit(ihost);
698 }
699
700 return 0;
701 }
702
isci_resume(struct device * dev)703 static int isci_resume(struct device *dev)
704 {
705 struct pci_dev *pdev = to_pci_dev(dev);
706 struct isci_host *ihost;
707 int i;
708
709 for_each_isci_host(i, ihost, pdev) {
710 sas_prep_resume_ha(&ihost->sas_ha);
711
712 isci_host_init(ihost);
713 isci_host_start(ihost->sas_ha.shost);
714 wait_for_start(ihost);
715
716 sas_resume_ha(&ihost->sas_ha);
717 }
718
719 return 0;
720 }
721 #endif
722
723 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
724
725 static struct pci_driver isci_pci_driver = {
726 .name = DRV_NAME,
727 .id_table = isci_id_table,
728 .probe = isci_pci_probe,
729 .remove = isci_pci_remove,
730 .driver.pm = &isci_pm_ops,
731 };
732
isci_init(void)733 static __init int isci_init(void)
734 {
735 int err;
736
737 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
738 DRV_NAME, DRV_VERSION);
739
740 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
741 if (!isci_transport_template)
742 return -ENOMEM;
743
744 err = pci_register_driver(&isci_pci_driver);
745 if (err)
746 sas_release_transport(isci_transport_template);
747
748 return err;
749 }
750
isci_exit(void)751 static __exit void isci_exit(void)
752 {
753 pci_unregister_driver(&isci_pci_driver);
754 sas_release_transport(isci_transport_template);
755 }
756
757 MODULE_DESCRIPTION("Intel(R) C600 Series Chipset SAS Controller driver");
758 MODULE_LICENSE("Dual BSD/GPL");
759 MODULE_FIRMWARE(ISCI_FW_NAME);
760 module_init(isci_init);
761 module_exit(isci_exit);
762