diff options
Diffstat (limited to 'drivers/scsi/isci/init.c')
| -rw-r--r-- | drivers/scsi/isci/init.c | 613 |
1 files changed, 613 insertions, 0 deletions
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c new file mode 100644 index 000000000000..07b072f3004d --- /dev/null +++ b/drivers/scsi/isci/init.c @@ -0,0 +1,613 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <asm/string.h> +#include "isci.h" +#include "task.h" +#include "sci_controller_constants.h" +#include "scic_remote_device.h" +#include "sci_environment.h" + +static struct scsi_transport_template *isci_transport_template; +struct kmem_cache *isci_kmem_cache; + +static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = { + { PCI_VDEVICE(INTEL, 0x1D61),}, + { PCI_VDEVICE(INTEL, 0x1D63),}, + { PCI_VDEVICE(INTEL, 0x1D65),}, + { PCI_VDEVICE(INTEL, 0x1D67),}, + { PCI_VDEVICE(INTEL, 0x1D69),}, + { PCI_VDEVICE(INTEL, 0x1D6B),}, + { PCI_VDEVICE(INTEL, 0x1D60),}, + { PCI_VDEVICE(INTEL, 0x1D62),}, + { PCI_VDEVICE(INTEL, 0x1D64),}, + { PCI_VDEVICE(INTEL, 0x1D66),}, + { PCI_VDEVICE(INTEL, 0x1D68),}, + { PCI_VDEVICE(INTEL, 0x1D6A),}, + {} +}; + +static int __devinit isci_pci_probe( + struct pci_dev *pdev, + const struct pci_device_id *device_id_p); + +static void __devexit isci_pci_remove(struct pci_dev *pdev); + +MODULE_DEVICE_TABLE(pci, isci_id_table); + +static struct pci_driver isci_pci_driver = { + .name = DRV_NAME, + .id_table = isci_id_table, + .probe = isci_pci_probe, + .remove = __devexit_p(isci_pci_remove), +}; + +/* linux isci specific settings */ +int loglevel = 3; +module_param(loglevel, int, S_IRUGO | S_IWUSR); + +#if defined(CONFIG_PBG_HBA_A0) +int isci_si_rev = ISCI_SI_REVA0; +#elif defined(CONFIG_PBG_HBA_A2) +int isci_si_rev = ISCI_SI_REVA2; +#else +int isci_si_rev = ISCI_SI_REVB0; +#endif +module_param(isci_si_rev, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(isci_si_rev, "override default si rev (0: A0 1: A2 2: B0)"); + +static struct scsi_host_template isci_sht = { + + .module = THIS_MODULE, + .name = DRV_NAME, + .queuecommand = sas_queuecommand, + .target_alloc = sas_target_alloc, + .slave_configure = sas_slave_configure, + .slave_destroy = sas_slave_destroy, + .scan_finished = isci_host_scan_finished, + .scan_start = isci_host_scan_start, + .change_queue_depth = sas_change_queue_depth, + .change_queue_type = sas_change_queue_type, + .bios_param = sas_bios_param, + .can_queue = ISCI_CAN_QUEUE_VAL, + .cmd_per_lun = 1, + .this_id = -1, + .sg_tablesize = SG_ALL, + .max_sectors = SCSI_DEFAULT_MAX_SECTORS, + .use_clustering = ENABLE_CLUSTERING, + .eh_device_reset_handler = sas_eh_device_reset_handler, + .eh_bus_reset_handler = isci_bus_reset_handler, + .slave_alloc = sas_slave_alloc, + .target_destroy = sas_target_destroy, + .ioctl = sas_ioctl, +}; + +static struct sas_domain_function_template isci_transport_ops = { + + /* The class calls these to notify the LLDD of an event. */ + .lldd_port_formed = isci_port_formed, + .lldd_port_deformed = isci_port_deformed, + + /* The class calls these when a device is found or gone. */ + .lldd_dev_found = isci_remote_device_found, + .lldd_dev_gone = isci_remote_device_gone, + + .lldd_execute_task = isci_task_execute_task, + /* Task Management Functions. Must be called from process context. */ + .lldd_abort_task = isci_task_abort_task, + .lldd_abort_task_set = isci_task_abort_task_set, + .lldd_clear_aca = isci_task_clear_aca, + .lldd_clear_task_set = isci_task_clear_task_set, + .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, + .lldd_lu_reset = isci_task_lu_reset, + .lldd_query_task = isci_task_query_task, + + /* Port and Adapter management */ + .lldd_clear_nexus_port = isci_task_clear_nexus_port, + .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, + + /* Phy management */ + .lldd_control_phy = isci_phy_control, +}; + + +/****************************************************************************** +* P R O T E C T E D M E T H O D S +******************************************************************************/ + + + +/** + * isci_register_sas_ha() - This method initializes various lldd + * specific members of the sas_ha struct and calls the libsas + * sas_register_ha() function. + * @isci_host: This parameter specifies the lldd specific wrapper for the + * libsas sas_ha struct. + * + * This method returns an error code indicating sucess or failure. The user + * should check for possible memory allocation error return otherwise, a zero + * indicates success. + */ +static int isci_register_sas_ha(struct isci_host *isci_host) +{ + int i; + struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); + struct asd_sas_phy **sas_phys; + struct asd_sas_port **sas_ports; + + sas_phys = devm_kzalloc(&isci_host->pdev->dev, + SCI_MAX_PHYS * sizeof(void *), + GFP_KERNEL); + if (!sas_phys) + return -ENOMEM; + + sas_ports = devm_kzalloc(&isci_host->pdev->dev, + SCI_MAX_PORTS * sizeof(void *), + GFP_KERNEL); + if (!sas_ports) + return -ENOMEM; + + /*----------------- Libsas Initialization Stuff---------------------- + * Set various fields in the sas_ha struct: + */ + + sas_ha->sas_ha_name = DRV_NAME; + sas_ha->lldd_module = THIS_MODULE; + sas_ha->sas_addr = &(isci_host->sas_addr[0]); + + /* set the array of phy and port structs. */ + for (i = 0; i < SCI_MAX_PHYS; i++) { + sas_phys[i] = &(isci_host->phys[i].sas_phy); + sas_ports[i] = &(isci_host->sas_ports[i]); + } + + sas_ha->sas_phy = sas_phys; + sas_ha->sas_port = sas_ports; + sas_ha->num_phys = SCI_MAX_PHYS; + + sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; + sas_ha->lldd_max_execute_num = 1; + sas_ha->strict_wide_ports = 1; + + sas_register_ha(sas_ha); + + return 0; +} + +static void isci_unregister_sas_ha(struct isci_host *isci_host) +{ + if (!isci_host) + return; + + sas_unregister_ha(&(isci_host->sas_ha)); + + sas_remove_host(isci_host->shost); + scsi_remove_host(isci_host->shost); + scsi_host_put(isci_host->shost); +} + +static int __devinit isci_pci_init(struct pci_dev *pdev) +{ + int err, bar_num, bar_mask; + void __iomem * const *iomap; + + err = pcim_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, + "failed enable PCI device %s!\n", + pci_name(pdev)); + return err; + } + + for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) + bar_mask |= 1 << (bar_num * 2); + + err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); + if (err) + return err; + + iomap = pcim_iomap_table(pdev); + if (!iomap) + return -ENOMEM; + + pci_set_master(pdev); + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) + return err; + } + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) + return err; + } + + return 0; +} + +static struct isci_host *isci_host_by_id(struct pci_dev *pdev, int id) +{ + struct isci_host *h; + + for_each_isci_host(h, pdev) + if (h->id == id) + return h; + return NULL; +} + +static int num_controllers(struct pci_dev *pdev) +{ + /* bar size alone can tell us if we are running with a dual controller + * part, no need to trust revision ids that might be under broken firmware + * control + */ + resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); + resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); + + if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && + smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) + return SCI_MAX_CONTROLLERS; + else + return 1; +} + +static int isci_setup_interrupts(struct pci_dev *pdev) +{ + int err, i, num_msix; + struct isci_pci_info *pci_info = to_pci_info(pdev); + + /* + * Determine the number of vectors associated with this + * PCI function. + */ + num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; + + for (i = 0; i < num_msix; i++) + pci_info->msix_entries[i].entry = i; + + err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix); + if (err) + goto intx; + + for (i = 0; i < num_msix; i++) { + int id = i / SCI_NUM_MSI_X_INT; + struct msix_entry *msix = &pci_info->msix_entries[i]; + struct isci_host *isci_host = isci_host_by_id(pdev, id); + + BUG_ON(!isci_host); + + /* @todo: need to handle error case. */ + err = devm_request_irq(&pdev->dev, msix->vector, isci_isr, 0, + DRV_NAME"-msix", isci_host); + if (!err) + continue; + + dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); + while (i--) { + id = i / SCI_NUM_MSI_X_INT; + isci_host = isci_host_by_id(pdev, id); + msix = &pci_info->msix_entries[i]; + devm_free_irq(&pdev->dev, msix->vector, isci_host); + } + pci_disable_msix(pdev); + goto intx; + } + + return 0; + + intx: + err = devm_request_irq(&pdev->dev, pdev->irq, isci_legacy_isr, + IRQF_SHARED, DRV_NAME"-intx", pdev); + + return err; +} + +/** + * isci_parse_oem_parameters() - This method will take OEM parameters + * from the module init parameters and copy them to oem_params. This will + * only copy values that are not set to the module parameter default values + * @oem_parameters: This parameter specifies the controller default OEM + * parameters. It is expected that this has been initialized to the default + * parameters for the controller + * + * + */ +enum sci_status isci_parse_oem_parameters(union scic_oem_parameters *oem_params, + int scu_index, + struct isci_firmware *fw) +{ + int i; + + /* check for valid inputs */ + if (!(scu_index >= 0 + && scu_index < SCI_MAX_CONTROLLERS + && oem_params != NULL)) { + return SCI_FAILURE; + } + + for (i = 0; i < SCI_MAX_PHYS; i++) { + int array_idx = i + (SCI_MAX_PHYS * scu_index); + u64 sas_addr = fw->sas_addrs[array_idx]; + + if (sas_addr != 0) { + oem_params->sds1.phys[i].sas_address.low = + (u32)(sas_addr & 0xffffffff); + oem_params->sds1.phys[i].sas_address.high = + (u32)((sas_addr >> 32) & 0xffffffff); + } + } + + for (i = 0; i < SCI_MAX_PORTS; i++) { + int array_idx = i + (SCI_MAX_PORTS * scu_index); + u32 pmask = fw->phy_masks[array_idx]; + + oem_params->sds1.ports[i].phy_mask = pmask; + } + + return SCI_SUCCESS; +} + +/** + * isci_parse_user_parameters() - This method will take user parameters + * from the module init parameters and copy them to user_params. This will + * only copy values that are not set to the module parameter default values + * @user_parameters: This parameter specifies the controller default user + * parameters. It is expected that this has been initialized to the default + * parameters for the controller + * + * + */ +enum sci_status isci_parse_user_parameters( + union scic_user_parameters *user_params, + int scu_index, + struct isci_firmware *fw) +{ + int i; + + if (!(scu_index >= 0 + && scu_index < SCI_MAX_CONTROLLERS + && user_params != NULL)) { + return SCI_FAILURE; + } + + for (i = 0; i < SCI_MAX_PORTS; i++) { + int array_idx = i + (SCI_MAX_PORTS * scu_index); + u32 gen = fw->phy_gens[array_idx]; + + user_params->sds1.phys[i].max_speed_generation = gen; + + } + + return SCI_SUCCESS; +} + +static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) +{ + struct isci_host *isci_host; + struct Scsi_Host *shost; + int err; + + isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL); + if (!isci_host) + return NULL; + + isci_host->pdev = pdev; + isci_host->id = id; + + shost = scsi_host_alloc(&isci_sht, sizeof(void *)); + if (!shost) + return NULL; + isci_host->shost = shost; + + err = isci_host_init(isci_host); + if (err) + goto err_shost; + + SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha; + isci_host->sas_ha.core.shost = shost; + shost->transportt = isci_transport_template; + + shost->max_id = ~0; + shost->max_lun = ~0; + shost->max_cmd_len = MAX_COMMAND_SIZE; + + err = scsi_add_host(shost, &pdev->dev); + if (err) + goto err_shost; + + err = isci_register_sas_ha(isci_host); + if (err) + goto err_shost_remove; + + return isci_host; + + err_shost_remove: + scsi_remove_host(shost); + err_shost: + scsi_host_put(shost); + + return NULL; +} + +static void check_si_rev(struct pci_dev *pdev) +{ + if (num_controllers(pdev) > 1) + isci_si_rev = ISCI_SI_REVB0; + else { + switch (pdev->revision) { + case 0: + case 1: + /* if the id is ambiguous don't update isci_si_rev */ + break; + case 3: + isci_si_rev = ISCI_SI_REVA2; + break; + default: + case 4: + isci_si_rev = ISCI_SI_REVB0; + break; + } + } + + dev_info(&pdev->dev, "driver configured for %s silicon (rev: %d)\n", + isci_si_rev == ISCI_SI_REVA0 ? "A0" : + isci_si_rev == ISCI_SI_REVA2 ? "A2" : "B0", pdev->revision); + +} + +static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct isci_pci_info *pci_info; + int err, i; + struct isci_host *isci_host; + + check_si_rev(pdev); + + pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); + if (!pci_info) + return -ENOMEM; + pci_set_drvdata(pdev, pci_info); + + err = isci_pci_init(pdev); + if (err) + return err; + + for (i = 0; i < num_controllers(pdev); i++) { + struct isci_host *h = isci_host_alloc(pdev, i); + + if (!h) { + err = -ENOMEM; + goto err_host_alloc; + } + + h->next = pci_info->hosts; + pci_info->hosts = h; + } + + err = isci_setup_interrupts(pdev); + if (err) + goto err_host_alloc; + + for_each_isci_host(isci_host, pdev) + scsi_scan_host(isci_host->shost); + + return 0; + + err_host_alloc: + for_each_isci_host(isci_host, pdev) + isci_unregister_sas_ha(isci_host); + return err; +} + +static void __devexit isci_pci_remove(struct pci_dev *pdev) +{ + struct isci_host *isci_host; + + for_each_isci_host(isci_host, pdev) { + isci_unregister_sas_ha(isci_host); + isci_host_deinit(isci_host); + scic_controller_disable_interrupts(isci_host->core_controller); + } +} + +static __init int isci_init(void) +{ + int err = -ENOMEM; + + pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME); + + isci_kmem_cache = kmem_cache_create(DRV_NAME, + sizeof(struct isci_remote_device) + + scic_remote_device_get_object_size(), + 0, 0, NULL); + if (!isci_kmem_cache) + return err; + + isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); + if (!isci_transport_template) + goto err_kmem; + + err = pci_register_driver(&isci_pci_driver); + if (err) + goto err_sas; + + return 0; + + err_sas: + sas_release_transport(isci_transport_template); + err_kmem: + kmem_cache_destroy(isci_kmem_cache); + + return err; +} + +static __exit void isci_exit(void) +{ + pci_unregister_driver(&isci_pci_driver); + sas_release_transport(isci_transport_template); + kmem_cache_destroy(isci_kmem_cache); +} + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_FIRMWARE(ISCI_FW_NAME); +module_init(isci_init); +module_exit(isci_exit); |