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 000000000000..61e0d09e2b57
--- /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);