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