diff options
Diffstat (limited to 'drivers/scsi/isci/init.c')
| -rw-r--r-- | drivers/scsi/isci/init.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c new file mode 100644 index 0000000..61e0d09 --- /dev/null +++ b/drivers/scsi/isci/init.c @@ -0,0 +1,565 @@ +/* + * 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 <linux/firmware.h> +#include <linux/efi.h> +#include <asm/string.h> +#include "isci.h" +#include "task.h" +#include "probe_roms.h" + +static struct scsi_transport_template *isci_transport_template; + +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),}, + {} +}; + +MODULE_DEVICE_TABLE(pci, isci_id_table); + +/* linux isci specific settings */ + +unsigned char no_outbound_task_to = 20; +module_param(no_outbound_task_to, byte, 0); +MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); + +u16 ssp_max_occ_to = 20; +module_param(ssp_max_occ_to, ushort, 0); +MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)"); + +u16 stp_max_occ_to = 5; +module_param(stp_max_occ_to, ushort, 0); +MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)"); + +u16 ssp_inactive_to = 5; +module_param(ssp_inactive_to, ushort, 0); +MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)"); + +u16 stp_inactive_to = 5; +module_param(stp_inactive_to, ushort, 0); +MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)"); + +unsigned char phy_gen = 3; +module_param(phy_gen, byte, 0); +MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)"); + +unsigned char max_concurr_spinup = 1; +module_param(max_concurr_spinup, byte, 0); +MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); + +static struct scsi_host_template isci_sht = { + + .module = THIS_MODULE, + .name = DRV_NAME, + .proc_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->phys[0].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->ports[i].sas_port; + } + + 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 ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev); + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha); + + return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id); +} + +static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL); + +static void isci_unregister(struct isci_host *isci_host) +{ + struct Scsi_Host *shost; + + if (!isci_host) + return; + + shost = isci_host->shost; + device_remove_file(&shost->shost_dev, &dev_attr_isci_id); + + 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 = 0; + 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 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_host *ihost; + 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]; + irq_handler_t isr; + + ihost = pci_info->hosts[id]; + /* odd numbered vectors are error interrupts */ + if (i & 1) + isr = isci_error_isr; + else + isr = isci_msix_isr; + + err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, + DRV_NAME"-msix", ihost); + if (!err) + continue; + + dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); + while (i--) { + id = i / SCI_NUM_MSI_X_INT; + ihost = pci_info->hosts[id]; + msix = &pci_info->msix_entries[i]; + devm_free_irq(&pdev->dev, msix->vector, ihost); + } + pci_disable_msix(pdev); + goto intx; + } + return 0; + + intx: + for_each_isci_host(i, ihost, pdev) { + err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, + IRQF_SHARED, DRV_NAME"-intx", ihost); + if (err) + break; + } + return err; +} + +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; + + err = device_create_file(&shost->shost_dev, &dev_attr_isci_id); + if (err) + goto err_unregister_ha; + + return isci_host; + + err_unregister_ha: + sas_unregister_ha(&(isci_host->sas_ha)); + err_shost_remove: + scsi_remove_host(shost); + err_shost: + scsi_host_put(shost); + + return NULL; +} + +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; + const struct firmware *fw = NULL; + struct isci_orom *orom = NULL; + char *source = "(platform)"; + + dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", + pdev->revision); + + pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); + if (!pci_info) + return -ENOMEM; + pci_set_drvdata(pdev, pci_info); + + if (efi_enabled) + orom = isci_get_efi_var(pdev); + + if (!orom) + orom = isci_request_oprom(pdev); + + for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) { + if (sci_oem_parameters_validate(&orom->ctrl[i])) { + dev_warn(&pdev->dev, + "[%d]: invalid oem parameters detected, falling back to firmware\n", i); + devm_kfree(&pdev->dev, orom); + orom = NULL; + break; + } + } + + if (!orom) { + source = "(firmware)"; + orom = isci_request_firmware(pdev, fw); + if (!orom) { + /* TODO convert this to WARN_TAINT_ONCE once the + * orom/efi parameter support is widely available + */ + dev_warn(&pdev->dev, + "Loading user firmware failed, using default " + "values\n"); + dev_warn(&pdev->dev, + "Default OEM configuration being used: 4 " + "narrow ports, and default SAS Addresses\n"); + } + } + + if (orom) + dev_info(&pdev->dev, + "OEM SAS parameters (version: %u.%u) loaded %s\n", + (orom->hdr.version & 0xf0) >> 4, + (orom->hdr.version & 0xf), source); + + pci_info->orom = orom; + + 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; + } + pci_info->hosts[i] = h; + } + + err = isci_setup_interrupts(pdev); + if (err) + goto err_host_alloc; + + for_each_isci_host(i, isci_host, pdev) + scsi_scan_host(isci_host->shost); + + return 0; + + err_host_alloc: + for_each_isci_host(i, isci_host, pdev) + isci_unregister(isci_host); + return err; +} + +static void __devexit isci_pci_remove(struct pci_dev *pdev) +{ + struct isci_host *ihost; + int i; + + for_each_isci_host(i, ihost, pdev) { + isci_unregister(ihost); + isci_host_deinit(ihost); + sci_controller_disable_interrupts(ihost); + } +} + +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), +}; + +static __init int isci_init(void) +{ + int err; + + pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME); + + isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); + if (!isci_transport_template) + return -ENOMEM; + + err = pci_register_driver(&isci_pci_driver); + if (err) + sas_release_transport(isci_transport_template); + + return err; +} + +static __exit void isci_exit(void) +{ + pci_unregister_driver(&isci_pci_driver); + sas_release_transport(isci_transport_template); +} + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_FIRMWARE(ISCI_FW_NAME); +module_init(isci_init); +module_exit(isci_exit); |
