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