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.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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.
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.
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.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
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30 * modification, are permitted provided that the following conditions
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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>
64 #include "sci_controller_constants.h"
65 #include "scic_remote_device.h"
66 #include "sci_environment.h"
67 #include "probe_roms.h"
69 static struct scsi_transport_template *isci_transport_template;
71 static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
72 { PCI_VDEVICE(INTEL, 0x1D61),},
73 { PCI_VDEVICE(INTEL, 0x1D63),},
74 { PCI_VDEVICE(INTEL, 0x1D65),},
75 { PCI_VDEVICE(INTEL, 0x1D67),},
76 { PCI_VDEVICE(INTEL, 0x1D69),},
77 { PCI_VDEVICE(INTEL, 0x1D6B),},
78 { PCI_VDEVICE(INTEL, 0x1D60),},
79 { PCI_VDEVICE(INTEL, 0x1D62),},
80 { PCI_VDEVICE(INTEL, 0x1D64),},
81 { PCI_VDEVICE(INTEL, 0x1D66),},
82 { PCI_VDEVICE(INTEL, 0x1D68),},
83 { PCI_VDEVICE(INTEL, 0x1D6A),},
87 struct isci_firmware *isci_firmware;
89 static int __devinit isci_pci_probe(
91 const struct pci_device_id *device_id_p);
93 static void __devexit isci_pci_remove(struct pci_dev *pdev);
95 MODULE_DEVICE_TABLE(pci, isci_id_table);
97 static struct pci_driver isci_pci_driver = {
99 .id_table = isci_id_table,
100 .probe = isci_pci_probe,
101 .remove = __devexit_p(isci_pci_remove),
104 /* linux isci specific settings */
106 #if defined(CONFIG_PBG_HBA_A0)
107 int isci_si_rev = ISCI_SI_REVA0;
108 #elif defined(CONFIG_PBG_HBA_A2)
109 int isci_si_rev = ISCI_SI_REVA2;
111 int isci_si_rev = ISCI_SI_REVB0;
113 module_param(isci_si_rev, int, S_IRUGO | S_IWUSR);
114 MODULE_PARM_DESC(isci_si_rev, "override default si rev (0: A0 1: A2 2: B0)");
116 static struct scsi_host_template isci_sht = {
118 .module = THIS_MODULE,
120 .proc_name = DRV_NAME,
121 .queuecommand = sas_queuecommand,
122 .target_alloc = sas_target_alloc,
123 .slave_configure = sas_slave_configure,
124 .slave_destroy = sas_slave_destroy,
125 .scan_finished = isci_host_scan_finished,
126 .scan_start = isci_host_scan_start,
127 .change_queue_depth = sas_change_queue_depth,
128 .change_queue_type = sas_change_queue_type,
129 .bios_param = sas_bios_param,
130 .can_queue = ISCI_CAN_QUEUE_VAL,
133 .sg_tablesize = SG_ALL,
134 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
135 .use_clustering = ENABLE_CLUSTERING,
136 .eh_device_reset_handler = sas_eh_device_reset_handler,
137 .eh_bus_reset_handler = isci_bus_reset_handler,
138 .slave_alloc = sas_slave_alloc,
139 .target_destroy = sas_target_destroy,
143 static struct sas_domain_function_template isci_transport_ops = {
145 /* The class calls these to notify the LLDD of an event. */
146 .lldd_port_formed = isci_port_formed,
147 .lldd_port_deformed = isci_port_deformed,
149 /* The class calls these when a device is found or gone. */
150 .lldd_dev_found = isci_remote_device_found,
151 .lldd_dev_gone = isci_remote_device_gone,
153 .lldd_execute_task = isci_task_execute_task,
154 /* Task Management Functions. Must be called from process context. */
155 .lldd_abort_task = isci_task_abort_task,
156 .lldd_abort_task_set = isci_task_abort_task_set,
157 .lldd_clear_aca = isci_task_clear_aca,
158 .lldd_clear_task_set = isci_task_clear_task_set,
159 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
160 .lldd_lu_reset = isci_task_lu_reset,
161 .lldd_query_task = isci_task_query_task,
163 /* Port and Adapter management */
164 .lldd_clear_nexus_port = isci_task_clear_nexus_port,
165 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
168 .lldd_control_phy = isci_phy_control,
172 /******************************************************************************
173 * P R O T E C T E D M E T H O D S
174 ******************************************************************************/
179 * isci_register_sas_ha() - This method initializes various lldd
180 * specific members of the sas_ha struct and calls the libsas
181 * sas_register_ha() function.
182 * @isci_host: This parameter specifies the lldd specific wrapper for the
183 * libsas sas_ha struct.
185 * This method returns an error code indicating sucess or failure. The user
186 * should check for possible memory allocation error return otherwise, a zero
189 static int isci_register_sas_ha(struct isci_host *isci_host)
192 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
193 struct asd_sas_phy **sas_phys;
194 struct asd_sas_port **sas_ports;
196 sas_phys = devm_kzalloc(&isci_host->pdev->dev,
197 SCI_MAX_PHYS * sizeof(void *),
202 sas_ports = devm_kzalloc(&isci_host->pdev->dev,
203 SCI_MAX_PORTS * sizeof(void *),
208 /*----------------- Libsas Initialization Stuff----------------------
209 * Set various fields in the sas_ha struct:
212 sas_ha->sas_ha_name = DRV_NAME;
213 sas_ha->lldd_module = THIS_MODULE;
214 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
216 /* set the array of phy and port structs. */
217 for (i = 0; i < SCI_MAX_PHYS; i++) {
218 sas_phys[i] = &(isci_host->phys[i].sas_phy);
219 sas_ports[i] = &(isci_host->sas_ports[i]);
222 sas_ha->sas_phy = sas_phys;
223 sas_ha->sas_port = sas_ports;
224 sas_ha->num_phys = SCI_MAX_PHYS;
226 sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL;
227 sas_ha->lldd_max_execute_num = 1;
228 sas_ha->strict_wide_ports = 1;
230 sas_register_ha(sas_ha);
235 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
237 struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
238 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
239 struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
241 return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
244 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
246 static void isci_unregister(struct isci_host *isci_host)
248 struct Scsi_Host *shost;
253 shost = isci_host->shost;
254 device_remove_file(&shost->shost_dev, &dev_attr_isci_id);
256 sas_unregister_ha(&isci_host->sas_ha);
258 sas_remove_host(isci_host->shost);
259 scsi_remove_host(isci_host->shost);
260 scsi_host_put(isci_host->shost);
263 static int __devinit isci_pci_init(struct pci_dev *pdev)
265 int err, bar_num, bar_mask;
266 void __iomem * const *iomap;
268 err = pcim_enable_device(pdev);
271 "failed enable PCI device %s!\n",
276 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
277 bar_mask |= 1 << (bar_num * 2);
279 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
283 iomap = pcim_iomap_table(pdev);
287 pci_set_master(pdev);
289 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
291 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
296 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
298 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
306 static int num_controllers(struct pci_dev *pdev)
308 /* bar size alone can tell us if we are running with a dual controller
309 * part, no need to trust revision ids that might be under broken firmware
312 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
313 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
315 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
316 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
317 return SCI_MAX_CONTROLLERS;
322 static int isci_setup_interrupts(struct pci_dev *pdev)
324 int err, i, num_msix;
325 struct isci_pci_info *pci_info = to_pci_info(pdev);
328 * Determine the number of vectors associated with this
331 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
333 for (i = 0; i < num_msix; i++)
334 pci_info->msix_entries[i].entry = i;
336 err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix);
340 for (i = 0; i < num_msix; i++) {
341 int id = i / SCI_NUM_MSI_X_INT;
342 struct msix_entry *msix = &pci_info->msix_entries[i];
343 struct isci_host *isci_host = pci_info->hosts[id];
346 /* odd numbered vectors are error interrupts */
348 isr = isci_error_isr;
354 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
355 DRV_NAME"-msix", isci_host);
359 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
361 id = i / SCI_NUM_MSI_X_INT;
362 isci_host = pci_info->hosts[id];
363 msix = &pci_info->msix_entries[i];
364 devm_free_irq(&pdev->dev, msix->vector, isci_host);
366 pci_disable_msix(pdev);
373 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
374 IRQF_SHARED, DRV_NAME"-intx", pdev);
379 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
381 struct isci_host *isci_host;
382 struct Scsi_Host *shost;
385 isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host) +
386 SCI_MAX_REMOTE_DEVICES *
387 (sizeof(struct isci_remote_device) +
388 scic_remote_device_get_object_size()), GFP_KERNEL);
392 isci_host->pdev = pdev;
395 shost = scsi_host_alloc(&isci_sht, sizeof(void *));
398 isci_host->shost = shost;
400 err = isci_host_init(isci_host);
404 SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha;
405 isci_host->sas_ha.core.shost = shost;
406 shost->transportt = isci_transport_template;
410 shost->max_cmd_len = MAX_COMMAND_SIZE;
412 err = scsi_add_host(shost, &pdev->dev);
416 err = isci_register_sas_ha(isci_host);
418 goto err_shost_remove;
420 err = device_create_file(&shost->shost_dev, &dev_attr_isci_id);
422 goto err_unregister_ha;
427 sas_unregister_ha(&(isci_host->sas_ha));
429 scsi_remove_host(shost);
431 scsi_host_put(shost);
436 static void check_si_rev(struct pci_dev *pdev)
438 if (num_controllers(pdev) > 1)
439 isci_si_rev = ISCI_SI_REVB0;
441 switch (pdev->revision) {
444 /* if the id is ambiguous don't update isci_si_rev */
447 isci_si_rev = ISCI_SI_REVA2;
451 isci_si_rev = ISCI_SI_REVB0;
456 dev_info(&pdev->dev, "driver configured for %s silicon (rev: %d)\n",
457 isci_si_rev == ISCI_SI_REVA0 ? "A0" :
458 isci_si_rev == ISCI_SI_REVA2 ? "A2" : "B0", pdev->revision);
462 static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
464 struct isci_pci_info *pci_info;
466 struct isci_host *isci_host;
467 const struct firmware *fw = NULL;
468 struct isci_orom *orom;
472 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
475 pci_set_drvdata(pdev, pci_info);
478 orom = isci_get_efi_var(pdev);
480 orom = isci_request_oprom(pdev);
483 orom = isci_request_firmware(pdev, fw);
485 /* TODO convert this to WARN_TAINT_ONCE once the
486 * orom/efi parameter support is widely available
489 "Loading user firmware failed, using default "
492 "Default OEM configuration being used: 4 "
493 "narrow ports, and default SAS Addresses\n");
499 "OEM SAS parameters (version: %u.%u) loaded\n",
500 (orom->hdr.version & 0xf0) >> 4,
501 (orom->hdr.version & 0xf));
503 pci_info->orom = orom;
505 err = isci_pci_init(pdev);
509 for (i = 0; i < num_controllers(pdev); i++) {
510 struct isci_host *h = isci_host_alloc(pdev, i);
516 pci_info->hosts[i] = h;
519 err = isci_setup_interrupts(pdev);
523 for_each_isci_host(i, isci_host, pdev)
524 scsi_scan_host(isci_host->shost);
529 for_each_isci_host(i, isci_host, pdev)
530 isci_unregister(isci_host);
534 static void __devexit isci_pci_remove(struct pci_dev *pdev)
536 struct isci_host *isci_host;
539 for_each_isci_host(i, isci_host, pdev) {
540 isci_unregister(isci_host);
541 isci_host_deinit(isci_host);
542 scic_controller_disable_interrupts(isci_host->core_controller);
546 static __init int isci_init(void)
550 pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME);
552 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
553 if (!isci_transport_template)
556 err = pci_register_driver(&isci_pci_driver);
558 sas_release_transport(isci_transport_template);
563 static __exit void isci_exit(void)
565 pci_unregister_driver(&isci_pci_driver);
566 sas_release_transport(isci_transport_template);
569 MODULE_LICENSE("Dual BSD/GPL");
570 MODULE_FIRMWARE(ISCI_FW_NAME);
571 module_init(isci_init);
572 module_exit(isci_exit);