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