| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Linux/drivers/scsi/megaraid/ (Linux Kernel Version 6.17.9©) Datei vom 24.10.2025 mit Größe 97 kB |
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Quelle megaraid_mbox.cSprache: C |
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// SPDX-License-Identifier: GPL-2.0-or-later /* * * Linux MegaRAID device driver * * Copyright (c) 2003-2004 LSI Logic Corporation. * * FILE : megaraid_mbox.c * Version : v2.20.5.1 (Nov 16 2006) * * Authors: * Atul Mukker <Atul.Mukker@lsi.com> * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> * Manoj Jose <Manoj.Jose@lsi.com> * Seokmann Ju * * List of supported controllers * * OEM Product Name VID DID SSVID SSID * --- ------------ --- --- ---- ---- * Dell PERC3/QC 101E 1960 1028 0471 * Dell PERC3/DC 101E 1960 1028 0493 * Dell PERC3/SC 101E 1960 1028 0475 * Dell PERC3/Di 1028 1960 1028 0123 * Dell PERC4/SC 1000 1960 1028 0520 * Dell PERC4/DC 1000 1960 1028 0518 * Dell PERC4/QC 1000 0407 1028 0531 * Dell PERC4/Di 1028 000F 1028 014A * Dell PERC 4e/Si 1028 0013 1028 016c * Dell PERC 4e/Di 1028 0013 1028 016d * Dell PERC 4e/Di 1028 0013 1028 016e * Dell PERC 4e/Di 1028 0013 1028 016f * Dell PERC 4e/Di 1028 0013 1028 0170 * Dell PERC 4e/DC 1000 0408 1028 0002 * Dell PERC 4e/SC 1000 0408 1028 0001 * * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 * * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 * * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 * * ACER MegaRAID ROMB-2E 1000 0408 1025 004D * * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 * * For history of changes, see Documentation/scsi/ChangeLog.megaraid */ #include <linux/slab.h> #include <linux/module.h> #include "megaraid_mbox.h" static int megaraid_init(void); static void megaraid_exit(void); static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); static void megaraid_detach_one(struct pci_dev *); static void megaraid_mbox_shutdown(struct pci_dev *); static int megaraid_io_attach(adapter_t *); static void megaraid_io_detach(adapter_t *); static int megaraid_init_mbox(adapter_t *); static void megaraid_fini_mbox(adapter_t *); static int megaraid_alloc_cmd_packets(adapter_t *); static void megaraid_free_cmd_packets(adapter_t *); static int megaraid_mbox_setup_dma_pools(adapter_t *); static void megaraid_mbox_teardown_dma_pools(adapter_t *); static int megaraid_sysfs_alloc_resources(adapter_t *); static void megaraid_sysfs_free_resources(adapter_t *); static int megaraid_abort_handler(struct scsi_cmnd *); static int megaraid_reset_handler(struct scsi_cmnd *); static int mbox_post_sync_cmd(adapter_t *, uint8_t []); static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); static int megaraid_busywait_mbox(mraid_device_t *); static int megaraid_mbox_product_info(adapter_t *); static int megaraid_mbox_extended_cdb(adapter_t *); static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); static int megaraid_mbox_support_random_del(adapter_t *); static int megaraid_mbox_get_max_sg(adapter_t *); static void megaraid_mbox_enum_raid_scsi(adapter_t *); static void megaraid_mbox_flush_cache(adapter_t *); static int megaraid_mbox_fire_sync_cmd(adapter_t *); static void megaraid_mbox_display_scb(adapter_t *, scb_t *); static void megaraid_mbox_setup_device_map(adapter_t *); static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *); static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); static void megaraid_mbox_runpendq(adapter_t *, scb_t *); static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, struct scsi_cmnd *); static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, struct scsi_cmnd *); static irqreturn_t megaraid_isr(int, void *); static void megaraid_mbox_dpc(unsigned long); static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *at static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, cha static int megaraid_cmm_register(adapter_t *); static int megaraid_cmm_unregister(adapter_t *); static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); static void megaraid_mbox_mm_done(adapter_t *, scb_t *); static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); static int wait_till_fw_empty(adapter_t *); MODULE_AUTHOR("megaraidlinux@lsi.com"); MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(MEGARAID_VERSION); /* * ### modules parameters for driver ### */ /* * Set to enable driver to expose unconfigured disk to kernel */ static int megaraid_expose_unconf_disks = 0; module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); MODULE_PARM_DESC(unconf_disks, "Set to expose unconfigured disks to kernel (default=0)"); /* * driver wait time if the adapter's mailbox is busy */ static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; module_param_named(busy_wait, max_mbox_busy_wait, int, 0); MODULE_PARM_DESC(busy_wait, "Max wait for mailbox in microseconds if busy (default=10)"); /* * number of sectors per IO command */ static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; module_param_named(max_sectors, megaraid_max_sectors, int, 0); MODULE_PARM_DESC(max_sectors, "Maximum number of sectors per IO command (default=128)"); /* * number of commands per logical unit */ static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); MODULE_PARM_DESC(cmd_per_lun, "Maximum number of commands per logical unit (default=64)"); /* * Fast driver load option, skip scanning for physical devices during load. * This would result in non-disk devices being skipped during driver load * time. These can be later added though, using /proc/scsi/scsi */ static unsigned int megaraid_fast_load; module_param_named(fast_load, megaraid_fast_load, int, 0); MODULE_PARM_DESC(fast_load, "Faster loading of the driver, skips physical devices! (default=0)"); /* * mraid_debug level - threshold for amount of information to be displayed by * the driver. This level can be changed through modules parameters, ioctl or * sysfs/proc interface. By default, print the announcement messages only. */ int mraid_debug_level = CL_ANN; module_param_named(debug_level, mraid_debug_level, int, 0); MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); /* * PCI table for all supported controllers. */ static const struct pci_device_id pci_id_table_g[] = { { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4_DI_DISCOVERY, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_PERC4_SC, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4_SC, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_PERC4_DC, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4_DC, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_VERDE, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4_DI_EVERGLADES, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4E_SI_BIGBEND, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4E_DI_KOBUK, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4E_DI_KOBUK, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4E_DI_CORVETTE, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, }, { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, PCI_VENDOR_ID_DELL, PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_DOBSON, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID3, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_AMI_MEGARAID3, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LINDSAY, PCI_ANY_ID, PCI_ANY_ID, }, {0} /* Terminating entry */ }; MODULE_DEVICE_TABLE(pci, pci_id_table_g); static struct pci_driver megaraid_pci_driver = { .name = "megaraid", .id_table = pci_id_table_g, .probe = megaraid_probe_one, .remove = megaraid_detach_one, .shutdown = megaraid_mbox_shutdown, }; // definitions for the device attributes for exporting logical drive number // for a scsi address (Host, Channel, Id, Lun) static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl); // Host template initializer for megaraid mbox sysfs device attributes static struct attribute *megaraid_shost_attrs[] = { &dev_attr_megaraid_mbox_app_hndl.attr, NULL, }; ATTRIBUTE_GROUPS(megaraid_shost); static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld); // Host template initializer for megaraid mbox sysfs device attributes static struct attribute *megaraid_sdev_attrs[] = { &dev_attr_megaraid_mbox_ld.attr, NULL, }; ATTRIBUTE_GROUPS(megaraid_sdev); /* * Scsi host template for megaraid unified driver */ static const struct scsi_host_template megaraid_template_g = { .module = THIS_MODULE, .name = "LSI Logic MegaRAID driver", .proc_name = "megaraid", .queuecommand = megaraid_queue_command, .eh_abort_handler = megaraid_abort_handler, .eh_host_reset_handler = megaraid_reset_handler, .change_queue_depth = scsi_change_queue_depth, .no_write_same = 1, .sdev_groups = megaraid_sdev_groups, .shost_groups = megaraid_shost_groups, }; /** * megaraid_init - module load hook * * We register ourselves as hotplug enabled module and let PCI subsystem * discover our adapters. */ static int __init megaraid_init(void) { int rval; // Announce the driver version con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, MEGARAID_EXT_VERSION)); // check validity of module parameters if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { con_log(CL_ANN, (KERN_WARNING "megaraid mailbox: max commands per lun reset to %d\n", MBOX_MAX_SCSI_CMDS)); megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; } // register as a PCI hot-plug driver module rval = pci_register_driver(&megaraid_pci_driver); if (rval < 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: could not register hotplug support.\n")); } return rval; } /** * megaraid_exit - driver unload entry point * * We simply unwrap the megaraid_init routine here. */ static void __exit megaraid_exit(void) { con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); // unregister as PCI hotplug driver pci_unregister_driver(&megaraid_pci_driver); return; } /** * megaraid_probe_one - PCI hotplug entry point * @pdev : handle to this controller's PCI configuration space * @id : pci device id of the class of controllers * * This routine should be called whenever a new adapter is detected by the * PCI hotplug susbsystem. */ static int megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) { adapter_t *adapter; // detected a new controller con_log(CL_ANN, (KERN_INFO "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", pdev->vendor, pdev->device, pdev->subsystem_vendor, pdev->subsystem_device)); con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); if (pci_enable_device(pdev)) { con_log(CL_ANN, (KERN_WARNING "megaraid: pci_enable_device failed\n")); return -ENODEV; } // Enable bus-mastering on this controller pci_set_master(pdev); // Allocate the per driver initialization structure adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); if (adapter == NULL) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); goto out_probe_one; } // set up PCI related soft state and other pre-known parameters adapter->unique_id = pci_dev_id(pdev); adapter->irq = pdev->irq; adapter->pdev = pdev; atomic_set(&adapter->being_detached, 0); // Setup the default DMA mask. This would be changed later on // depending on hardware capabilities if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) { con_log(CL_ANN, (KERN_WARNING "megaraid: dma_set_mask failed:%d\n", __LINE__)); goto out_free_adapter; } // Initialize the synchronization lock for kernel and LLD spin_lock_init(&adapter->lock); // Initialize the command queues: the list of free SCBs and the list // of pending SCBs. INIT_LIST_HEAD(&adapter->kscb_pool); spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); INIT_LIST_HEAD(&adapter->pend_list); spin_lock_init(PENDING_LIST_LOCK(adapter)); INIT_LIST_HEAD(&adapter->completed_list); spin_lock_init(COMPLETED_LIST_LOCK(adapter)); // Start the mailbox based controller if (megaraid_init_mbox(adapter) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: mailbox adapter did not initialize\n")); goto out_free_adapter; } // Register with LSI Common Management Module if (megaraid_cmm_register(adapter) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: could not register with management module\n")); goto out_fini_mbox; } // setup adapter handle in PCI soft state pci_set_drvdata(pdev, adapter); // attach with scsi mid-layer if (megaraid_io_attach(adapter) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); goto out_cmm_unreg; } return 0; out_cmm_unreg: megaraid_cmm_unregister(adapter); out_fini_mbox: megaraid_fini_mbox(adapter); out_free_adapter: kfree(adapter); out_probe_one: pci_disable_device(pdev); return -ENODEV; } /** * megaraid_detach_one - release framework resources and call LLD release routine * @pdev : handle for our PCI configuration space * * This routine is called during driver unload. We free all the allocated * resources and call the corresponding LLD so that it can also release all * its resources. * * This routine is also called from the PCI hotplug system. */ static void megaraid_detach_one(struct pci_dev *pdev) { adapter_t *adapter; struct Scsi_Host *host; // Start a rollback on this adapter adapter = pci_get_drvdata(pdev); if (!adapter) { con_log(CL_ANN, (KERN_CRIT "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor, pdev->subsystem_device)); return; } else { con_log(CL_ANN, (KERN_NOTICE "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor, pdev->subsystem_device)); } host = adapter->host; // do not allow any more requests from the management module for this // adapter. // FIXME: How do we account for the request which might still be // pending with us? atomic_set(&adapter->being_detached, 1); // detach from the IO sub-system megaraid_io_detach(adapter); // Unregister from common management module // // FIXME: this must return success or failure for conditions if there // is a command pending with LLD or not. megaraid_cmm_unregister(adapter); // finalize the mailbox based controller and release all resources megaraid_fini_mbox(adapter); kfree(adapter); scsi_host_put(host); pci_disable_device(pdev); return; } /** * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA * @pdev : generic driver model device * * Shutdown notification, perform flush cache. */ static void megaraid_mbox_shutdown(struct pci_dev *pdev) { adapter_t *adapter = pci_get_drvdata(pdev); static int counter; if (!adapter) { con_log(CL_ANN, (KERN_WARNING "megaraid: null device in shutdown\n")); return; } // flush caches now con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", counter++)); megaraid_mbox_flush_cache(adapter); con_log(CL_ANN, ("done\n")); } /** * megaraid_io_attach - attach a device with the IO subsystem * @adapter : controller's soft state * * Attach this device with the IO subsystem. */ static int megaraid_io_attach(adapter_t *adapter) { struct Scsi_Host *host; // Initialize SCSI Host structure host = scsi_host_alloc(&megaraid_template_g, 8); if (!host) { con_log(CL_ANN, (KERN_WARNING "megaraid mbox: scsi_host_alloc failed\n")); return -1; } SCSIHOST2ADAP(host) = (caddr_t)adapter; adapter->host = host; host->irq = adapter->irq; host->unique_id = adapter->unique_id; host->can_queue = adapter->max_cmds; host->this_id = adapter->init_id; host->sg_tablesize = adapter->sglen; host->max_sectors = adapter->max_sectors; host->cmd_per_lun = adapter->cmd_per_lun; host->max_channel = adapter->max_channel; host->max_id = adapter->max_target; host->max_lun = adapter->max_lun; // notify mid-layer about the new controller if (scsi_add_host(host, &adapter->pdev->dev)) { con_log(CL_ANN, (KERN_WARNING "megaraid mbox: scsi_add_host failed\n")); scsi_host_put(host); return -1; } scsi_scan_host(host); return 0; } /** * megaraid_io_detach - detach a device from the IO subsystem * @adapter : controller's soft state * * Detach this device from the IO subsystem. */ static void megaraid_io_detach(adapter_t *adapter) { struct Scsi_Host *host; con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); host = adapter->host; scsi_remove_host(host); return; } /* * START: Mailbox Low Level Driver * * This is section specific to the single mailbox based controllers */ /** * megaraid_init_mbox - initialize controller * @adapter : our soft state * * - Allocate 16-byte aligned mailbox memory for firmware handshake * - Allocate controller's memory resources * - Find out all initialization data * - Allocate memory required for all the commands * - Use internal library of FW routines, build up complete soft state */ static int megaraid_init_mbox(adapter_t *adapter) { struct pci_dev *pdev; mraid_device_t *raid_dev; int i; uint32_t magic64; adapter->ito = MBOX_TIMEOUT; pdev = adapter->pdev; /* * Allocate and initialize the init data structure for mailbox * controllers */ raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); if (raid_dev == NULL) return -1; /* * Attach the adapter soft state to raid device soft state */ adapter->raid_device = (caddr_t)raid_dev; raid_dev->fast_load = megaraid_fast_load; // our baseport raid_dev->baseport = pci_resource_start(pdev, 0); if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: mem region busy\n")); goto out_free_raid_dev; } raid_dev->baseaddr = ioremap(raid_dev->baseport, 128); if (!raid_dev->baseaddr) { con_log(CL_ANN, (KERN_WARNING "megaraid: could not map hba memory\n") ); goto out_release_regions; } /* initialize the mutual exclusion lock for the mailbox */ spin_lock_init(&raid_dev->mailbox_lock); /* allocate memory required for commands */ if (megaraid_alloc_cmd_packets(adapter) != 0) goto out_iounmap; /* * Issue SYNC cmd to flush the pending cmds in the adapter * and initialize its internal state */ if (megaraid_mbox_fire_sync_cmd(adapter)) con_log(CL_ANN, ("megaraid: sync cmd failed\n")); /* * Setup the rest of the soft state using the library of * FW routines */ /* request IRQ and register the interrupt service routine */ if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", adapter)) { con_log(CL_ANN, (KERN_WARNING "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); goto out_alloc_cmds; } // Product info if (megaraid_mbox_product_info(adapter) != 0) goto out_free_irq; // Do we support extended CDBs adapter->max_cdb_sz = 10; if (megaraid_mbox_extended_cdb(adapter) == 0) { adapter->max_cdb_sz = 16; } /* * Do we support cluster environment, if we do, what is the initiator * id. * NOTE: In a non-cluster aware firmware environment, the LLD should * return 7 as initiator id. */ adapter->ha = 0; adapter->init_id = -1; if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { adapter->ha = 1; } /* * Prepare the device ids array to have the mapping between the kernel * device address and megaraid device address. * We export the physical devices on their actual addresses. The * logical drives are exported on a virtual SCSI channel */ megaraid_mbox_setup_device_map(adapter); // If the firmware supports random deletion, update the device id map if (megaraid_mbox_support_random_del(adapter)) { // Change the logical drives numbers in device_ids array one // slot in device_ids is reserved for target id, that's why // "<=" below for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { adapter->device_ids[adapter->max_channel][i] += 0x80; } adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; raid_dev->random_del_supported = 1; } /* * find out the maximum number of scatter-gather elements supported by * this firmware */ adapter->sglen = megaraid_mbox_get_max_sg(adapter); // enumerate RAID and SCSI channels so that all devices on SCSI // channels can later be exported, including disk devices megaraid_mbox_enum_raid_scsi(adapter); /* * Other parameters required by upper layer * * maximum number of sectors per IO command */ adapter->max_sectors = megaraid_max_sectors; /* * number of queued commands per LUN. */ adapter->cmd_per_lun = megaraid_cmd_per_lun; /* * Allocate resources required to issue FW calls, when sysfs is * accessed */ if (megaraid_sysfs_alloc_resources(adapter) != 0) goto out_free_irq; // Set the DMA mask to 64-bit. All supported controllers as capable of // DMA in this range pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); if (((magic64 == HBA_SIGNATURE_64_BIT) && ((adapter->pdev->subsystem_device != PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && (adapter->pdev->subsystem_device != PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && adapter->pdev->device == PCI_DEVICE_ID_VERDE) || (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) { con_log(CL_ANN, (KERN_WARNING "megaraid: DMA mask for 64-bit failed\n")); if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) { con_log(CL_ANN, (KERN_WARNING "megaraid: 32-bit DMA mask failed\n")); goto out_free_sysfs_res; } } } // setup tasklet for DPC tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, (unsigned long)adapter); con_log(CL_DLEVEL1, (KERN_INFO "megaraid mbox hba successfully initialized\n")); return 0; out_free_sysfs_res: megaraid_sysfs_free_resources(adapter); out_free_irq: free_irq(adapter->irq, adapter); out_alloc_cmds: megaraid_free_cmd_packets(adapter); out_iounmap: iounmap(raid_dev->baseaddr); out_release_regions: pci_release_regions(pdev); out_free_raid_dev: kfree(raid_dev); return -1; } /** * megaraid_fini_mbox - undo controller initialization * @adapter : our soft state */ static void megaraid_fini_mbox(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); // flush all caches megaraid_mbox_flush_cache(adapter); tasklet_kill(&adapter->dpc_h); megaraid_sysfs_free_resources(adapter); megaraid_free_cmd_packets(adapter); free_irq(adapter->irq, adapter); iounmap(raid_dev->baseaddr); pci_release_regions(adapter->pdev); kfree(raid_dev); return; } /** * megaraid_alloc_cmd_packets - allocate shared mailbox * @adapter : soft state of the raid controller * * Allocate and align the shared mailbox. This mailbox is used to issue * all the commands. For IO based controllers, the mailbox is also registered * with the FW. Allocate memory for all commands as well. * This is our big allocator. */ static int megaraid_alloc_cmd_packets(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); struct pci_dev *pdev; unsigned long align; scb_t *scb; mbox_ccb_t *ccb; struct mraid_pci_blk *epthru_pci_blk; struct mraid_pci_blk *sg_pci_blk; struct mraid_pci_blk *mbox_pci_blk; int i; pdev = adapter->pdev; /* * Setup the mailbox * Allocate the common 16-byte aligned memory for the handshake * mailbox. */ raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mbox64_t), &raid_dev->una_mbox64_dma, GFP_KERNEL); if (!raid_dev->una_mbox64) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); return -1; } /* * Align the mailbox at 16-byte boundary */ raid_dev->mbox = &raid_dev->una_mbox64->mbox32; raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & (~0UL ^ 0xFUL)); raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); align = ((void *)raid_dev->mbox - ((void *)&raid_dev->una_mbox64->mbox32)); raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + align; // Allocate memory for commands issued internally adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE, &adapter->ibuf_dma_h, GFP_KERNEL); if (!adapter->ibuf) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); goto out_free_common_mbox; } // Allocate memory for our SCSI Command Blocks and their associated // memory /* * Allocate memory for the base list of scb. Later allocate memory for * CCBs and embedded components of each CCB and point the pointers in * scb to the allocated components * NOTE: The code to allocate SCB will be duplicated in all the LLD * since the calling routine does not yet know the number of available * commands. */ adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); if (adapter->kscb_list == NULL) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); goto out_free_ibuf; } // memory allocation for our command packets if (megaraid_mbox_setup_dma_pools(adapter) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); goto out_free_scb_list; } // Adjust the scb pointers and link in the free pool epthru_pci_blk = raid_dev->epthru_pool; sg_pci_blk = raid_dev->sg_pool; mbox_pci_blk = raid_dev->mbox_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { scb = adapter->kscb_list + i; ccb = raid_dev->ccb_list + i; ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); ccb->raw_mbox = (uint8_t *)ccb->mbox; ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; // make sure the mailbox is aligned properly if (ccb->mbox_dma_h & 0x0F) { con_log(CL_ANN, (KERN_CRIT "megaraid mbox: not aligned on 16-bytes\n")); goto out_teardown_dma_pools; } ccb->epthru = (mraid_epassthru_t *) epthru_pci_blk[i].vaddr; ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; ccb->pthru = (mraid_passthru_t *)ccb->epthru; ccb->pthru_dma_h = ccb->epthru_dma_h; ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; scb->ccb = (caddr_t)ccb; scb->gp = 0; scb->sno = i; // command index scb->scp = NULL; scb->state = SCB_FREE; scb->dma_direction = DMA_NONE; scb->dma_type = MRAID_DMA_NONE; scb->dev_channel = -1; scb->dev_target = -1; // put scb in the free pool list_add_tail(&scb->list, &adapter->kscb_pool); } return 0; out_teardown_dma_pools: megaraid_mbox_teardown_dma_pools(adapter); out_free_scb_list: kfree(adapter->kscb_list); out_free_ibuf: dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, adapter->ibuf_dma_h); out_free_common_mbox: dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); return -1; } /** * megaraid_free_cmd_packets - free memory * @adapter : soft state of the raid controller * * Release memory resources allocated for commands. */ static void megaraid_free_cmd_packets(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); megaraid_mbox_teardown_dma_pools(adapter); kfree(adapter->kscb_list); dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, adapter->ibuf_dma_h); dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); return; } /** * megaraid_mbox_setup_dma_pools - setup dma pool for command packets * @adapter : HBA soft state * * Setup the dma pools for mailbox, passthru and extended passthru structures, * and scatter-gather lists. */ static int megaraid_mbox_setup_dma_pools(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); struct mraid_pci_blk *epthru_pci_blk; struct mraid_pci_blk *sg_pci_blk; struct mraid_pci_blk *mbox_pci_blk; int i; // Allocate memory for 16-bytes aligned mailboxes raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool", &adapter->pdev->dev, sizeof(mbox64_t) + 16, 16, 0); if (raid_dev->mbox_pool_handle == NULL) { goto fail_setup_dma_pool; } mbox_pci_blk = raid_dev->mbox_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { mbox_pci_blk[i].vaddr = dma_pool_alloc( raid_dev->mbox_pool_handle, GFP_KERNEL, &mbox_pci_blk[i].dma_addr); if (!mbox_pci_blk[i].vaddr) { goto fail_setup_dma_pool; } } /* * Allocate memory for each embedded passthru strucuture pointer * Request for a 128 bytes aligned structure for each passthru command * structure * Since passthru and extended passthru commands are exclusive, they * share common memory pool. Passthru structures piggyback on memory * allocated to extended passthru since passthru is smaller of the two */ raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru", &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0); if (raid_dev->epthru_pool_handle == NULL) { goto fail_setup_dma_pool; } epthru_pci_blk = raid_dev->epthru_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { epthru_pci_blk[i].vaddr = dma_pool_alloc( raid_dev->epthru_pool_handle, GFP_KERNEL, &epthru_pci_blk[i].dma_addr); if (!epthru_pci_blk[i].vaddr) { goto fail_setup_dma_pool; } } // Allocate memory for each scatter-gather list. Request for 512 bytes // alignment for each sg list raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg", &adapter->pdev->dev, sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 512, 0); if (raid_dev->sg_pool_handle == NULL) { goto fail_setup_dma_pool; } sg_pci_blk = raid_dev->sg_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { sg_pci_blk[i].vaddr = dma_pool_alloc( raid_dev->sg_pool_handle, GFP_KERNEL, &sg_pci_blk[i].dma_addr); if (!sg_pci_blk[i].vaddr) { goto fail_setup_dma_pool; } } return 0; fail_setup_dma_pool: megaraid_mbox_teardown_dma_pools(adapter); return -1; } /** * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets * @adapter : HBA soft state * * Teardown the dma pool for mailbox, passthru and extended passthru * structures, and scatter-gather lists. */ static void megaraid_mbox_teardown_dma_pools(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); struct mraid_pci_blk *epthru_pci_blk; struct mraid_pci_blk *sg_pci_blk; struct mraid_pci_blk *mbox_pci_blk; int i; sg_pci_blk = raid_dev->sg_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, sg_pci_blk[i].dma_addr); } dma_pool_destroy(raid_dev->sg_pool_handle); epthru_pci_blk = raid_dev->epthru_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { dma_pool_free(raid_dev->epthru_pool_handle, epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); } dma_pool_destroy(raid_dev->epthru_pool_handle); mbox_pci_blk = raid_dev->mbox_pool; for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { dma_pool_free(raid_dev->mbox_pool_handle, mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); } dma_pool_destroy(raid_dev->mbox_pool_handle); return; } /** * megaraid_alloc_scb - detach and return a scb from the free list * @adapter : controller's soft state * @scp : pointer to the scsi command to be executed * * Return the scb from the head of the free list. %NULL if there are none * available. */ static scb_t * megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) { struct list_head *head = &adapter->kscb_pool; scb_t *scb = NULL; unsigned long flags; // detach scb from free pool spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); if (list_empty(head)) { spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); return NULL; } scb = list_entry(head->next, scb_t, list); list_del_init(&scb->list); spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); scb->state = SCB_ACTIVE; scb->scp = scp; scb->dma_type = MRAID_DMA_NONE; return scb; } /** * megaraid_dealloc_scb - return the scb to the free pool * @adapter : controller's soft state * @scb : scb to be freed * * Return the scb back to the free list of scbs. The caller must 'flush' the * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. * NOTE NOTE: Make sure the scb is not on any list before calling this * routine. */ static inline void megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) { unsigned long flags; // put scb in the free pool scb->state = SCB_FREE; scb->scp = NULL; spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); list_add(&scb->list, &adapter->kscb_pool); spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); return; } /** * megaraid_mbox_mksgl - make the scatter-gather list * @adapter : controller's soft state * @scb : scsi control block * * Prepare the scatter-gather list. */ static int megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) { struct scatterlist *sgl; mbox_ccb_t *ccb; struct scsi_cmnd *scp; int sgcnt; int i; scp = scb->scp; ccb = (mbox_ccb_t *)scb->ccb; sgcnt = scsi_dma_map(scp); BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); // no mapping required if no data to be transferred if (!sgcnt) return 0; scb->dma_type = MRAID_DMA_WSG; scsi_for_each_sg(scp, sgl, sgcnt, i) { ccb->sgl64[i].address = sg_dma_address(sgl); ccb->sgl64[i].length = sg_dma_len(sgl); } // Return count of SG nodes return sgcnt; } /** * mbox_post_cmd - issue a mailbox command * @adapter : controller's soft state * @scb : command to be issued * * Post the command to the controller if mailbox is available. */ static int mbox_post_cmd(adapter_t *adapter, scb_t *scb) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox64_t *mbox64; mbox_t *mbox; mbox_ccb_t *ccb; unsigned long flags; unsigned int i = 0; ccb = (mbox_ccb_t *)scb->ccb; mbox = raid_dev->mbox; mbox64 = raid_dev->mbox64; /* * Check for busy mailbox. If it is, return failure - the caller * should retry later. */ spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); if (unlikely(mbox->busy)) { do { udelay(1); i++; rmb(); } while(mbox->busy && (i < max_mbox_busy_wait)); if (mbox->busy) { spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); return -1; } } // Copy this command's mailbox data into "adapter's" mailbox memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); mbox->cmdid = scb->sno; adapter->outstanding_cmds++; mbox->busy = 1; // Set busy mbox->poll = 0; mbox->ack = 0; wmb(); WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); return 0; } /** * megaraid_queue_command_lck - generic queue entry point for all LLDs * @scp : pointer to the scsi command to be executed * * Queue entry point for mailbox based controllers. */ static int megaraid_queue_command_lck(struct scsi_cmnd *scp) { void (*done)(struct scsi_cmnd *) = scsi_done; adapter_t *adapter; scb_t *scb; int if_busy; adapter = SCP2ADAPTER(scp); scp->result = 0; /* * Allocate and build a SCB request * if_busy flag will be set if megaraid_mbox_build_cmd() command could * not allocate scb. We will return non-zero status in that case. * NOTE: scb can be null even though certain commands completed * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would * return 0 in that case, and we would do the callback right away. */ if_busy = 0; scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); if (!scb) { // command already completed done(scp); return 0; } megaraid_mbox_runpendq(adapter, scb); return if_busy; } static DEF_SCSI_QCMD(megaraid_queue_command) /** * megaraid_mbox_build_cmd - transform the mid-layer scsi commands * @adapter : controller's soft state * @scp : mid-layer scsi command pointer * @busy : set if request could not be completed because of lack of * resources * * Transform the mid-layer scsi command to megaraid firmware lingua. * Convert the command issued by mid-layer to format understood by megaraid * firmware. We also complete certain commands without sending them to firmware. */ static scb_t * megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) { mraid_device_t *rdev = ADAP2RAIDDEV(adapter); int channel; int target; int islogical; mbox_ccb_t *ccb; mraid_passthru_t *pthru; mbox64_t *mbox64; mbox_t *mbox; scb_t *scb; char skip[] = "skipping"; char scan[] = "scanning"; char *ss; /* * Get the appropriate device map for the device this command is * intended for */ MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); /* * Logical drive commands */ if (islogical) { switch (scp->cmnd[0]) { case TEST_UNIT_READY: /* * Do we support clustering and is the support enabled * If no, return success always */ if (!adapter->ha) { scp->result = (DID_OK << 16); return NULL; } if (!(scb = megaraid_alloc_scb(adapter, scp))) { scp->result = (DID_ERROR << 16); *busy = 1; return NULL; } scb->dma_direction = scp->sc_data_direction; scb->dev_channel = 0xFF; scb->dev_target = target; ccb = (mbox_ccb_t *)scb->ccb; /* * The command id will be provided by the command * issuance routine */ ccb->raw_mbox[0] = CLUSTER_CMD; ccb->raw_mbox[2] = RESERVATION_STATUS; ccb->raw_mbox[3] = target; return scb; case MODE_SENSE: { struct scatterlist *sgl; caddr_t vaddr; sgl = scsi_sglist(scp); if (sg_page(sgl)) { vaddr = (caddr_t) sg_virt(&sgl[0]); memset(vaddr, 0, scp->cmnd[4]); } else { con_log(CL_ANN, (KERN_WARNING "megaraid mailbox: invalid sg:%d\n", __LINE__)); } } scp->result = (DID_OK << 16); return NULL; case INQUIRY: /* * Display the channel scan for logical drives * Do not display scan for a channel if already done. */ if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { con_log(CL_ANN, (KERN_INFO "scsi[%d]: scanning scsi channel %d", adapter->host->host_no, SCP2CHANNEL(scp))); con_log(CL_ANN, ( " [virtual] for logical drives\n")); rdev->last_disp |= (1L << SCP2CHANNEL(scp)); } if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { scsi_build_sense(scp, 0, ILLEGAL_REQUEST, MEGA_INVALID_FIELD_IN_CDB, 0); return NULL; } fallthrough; case READ_CAPACITY: /* * Do not allow LUN > 0 for logical drives and * requests for more than 40 logical drives */ if (SCP2LUN(scp)) { scp->result = (DID_BAD_TARGET << 16); return NULL; } if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { scp->result = (DID_BAD_TARGET << 16); return NULL; } /* Allocate a SCB and initialize passthru */ if (!(scb = megaraid_alloc_scb(adapter, scp))) { scp->result = (DID_ERROR << 16); *busy = 1; return NULL; } ccb = (mbox_ccb_t *)scb->ccb; scb->dev_channel = 0xFF; scb->dev_target = target; pthru = ccb->pthru; mbox = ccb->mbox; mbox64 = ccb->mbox64; pthru->timeout = 0; pthru->ars = 1; pthru->reqsenselen = 14; pthru->islogical = 1; pthru->logdrv = target; pthru->cdblen = scp->cmd_len; memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); mbox->cmd = MBOXCMD_PASSTHRU64; scb->dma_direction = scp->sc_data_direction; pthru->dataxferlen = scsi_bufflen(scp); pthru->dataxferaddr = ccb->sgl_dma_h; pthru->numsge = megaraid_mbox_mksgl(adapter, scb); mbox->xferaddr = 0xFFFFFFFF; mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; mbox64->xferaddr_hi = 0; return scb; case READ_6: case WRITE_6: case READ_10: case WRITE_10: case READ_12: case WRITE_12: /* * Allocate a SCB and initialize mailbox */ if (!(scb = megaraid_alloc_scb(adapter, scp))) { scp->result = (DID_ERROR << 16); *busy = 1; return NULL; } ccb = (mbox_ccb_t *)scb->ccb; scb->dev_channel = 0xFF; scb->dev_target = target; mbox = ccb->mbox; mbox64 = ccb->mbox64; mbox->logdrv = target; /* * A little HACK: 2nd bit is zero for all scsi read * commands and is set for all scsi write commands */ mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: MBOXCMD_LREAD64 ; /* * 6-byte READ(0x08) or WRITE(0x0A) cdb */ if (scp->cmd_len == 6) { mbox->numsectors = (uint32_t)scp->cmnd[4]; mbox->lba = ((uint32_t)scp->cmnd[1] << 16) | ((uint32_t)scp->cmnd[2] << 8) | (uint32_t)scp->cmnd[3]; mbox->lba &= 0x1FFFFF; } /* * 10-byte READ(0x28) or WRITE(0x2A) cdb */ else if (scp->cmd_len == 10) { mbox->numsectors = (uint32_t)scp->cmnd[8] | ((uint32_t)scp->cmnd[7] << 8); mbox->lba = ((uint32_t)scp->cmnd[2] << 24) | ((uint32_t)scp->cmnd[3] << 16) | ((uint32_t)scp->cmnd[4] << 8) | (uint32_t)scp->cmnd[5]; } /* * 12-byte READ(0xA8) or WRITE(0xAA) cdb */ else if (scp->cmd_len == 12) { mbox->lba = ((uint32_t)scp->cmnd[2] << 24) | ((uint32_t)scp->cmnd[3] << 16) | ((uint32_t)scp->cmnd[4] << 8) | (uint32_t)scp->cmnd[5]; mbox->numsectors = ((uint32_t)scp->cmnd[6] << 24) | ((uint32_t)scp->cmnd[7] << 16) | ((uint32_t)scp->cmnd[8] << 8) | (uint32_t)scp->cmnd[9]; } else { con_log(CL_ANN, (KERN_WARNING "megaraid: unsupported CDB length\n")); megaraid_dealloc_scb(adapter, scb); scp->result = (DID_ERROR << 16); return NULL; } scb->dma_direction = scp->sc_data_direction; // Calculate Scatter-Gather info mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; mbox->numsge = megaraid_mbox_mksgl(adapter, scb); mbox->xferaddr = 0xFFFFFFFF; mbox64->xferaddr_hi = 0; return scb; case RESERVE_6: case RELEASE_6: /* * Do we support clustering and is the support enabled */ if (!adapter->ha) { scp->result = (DID_BAD_TARGET << 16); return NULL; } /* * Allocate a SCB and initialize mailbox */ if (!(scb = megaraid_alloc_scb(adapter, scp))) { scp->result = (DID_ERROR << 16); *busy = 1; return NULL; } ccb = (mbox_ccb_t *)scb->ccb; scb->dev_channel = 0xFF; scb->dev_target = target; ccb->raw_mbox[0] = CLUSTER_CMD; ccb->raw_mbox[2] = scp->cmnd[0] == RESERVE_6 ? RESERVE_LD : RELEASE_LD; ccb->raw_mbox[3] = target; scb->dma_direction = scp->sc_data_direction; return scb; default: scp->result = (DID_BAD_TARGET << 16); return NULL; } } else { // Passthru device commands // Do not allow access to target id > 15 or LUN > 7 if (target > 15 || SCP2LUN(scp) > 7) { scp->result = (DID_BAD_TARGET << 16); return NULL; } // if fast load option was set and scan for last device is // over, reset the fast_load flag so that during a possible // next scan, devices can be made available if (rdev->fast_load && (target == 15) && (SCP2CHANNEL(scp) == adapter->max_channel -1)) { con_log(CL_ANN, (KERN_INFO "megaraid[%d]: physical device scan re-enabled\n", adapter->host->host_no)); rdev->fast_load = 0; } /* * Display the channel scan for physical devices */ if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { ss = rdev->fast_load ? skip : scan; con_log(CL_ANN, (KERN_INFO "scsi[%d]: %s scsi channel %d [Phy %d]", adapter->host->host_no, ss, SCP2CHANNEL(scp), channel)); con_log(CL_ANN, ( " for non-raid devices\n")); rdev->last_disp |= (1L << SCP2CHANNEL(scp)); } // disable channel sweep if fast load option given if (rdev->fast_load) { scp->result = (DID_BAD_TARGET << 16); return NULL; } // Allocate a SCB and initialize passthru if (!(scb = megaraid_alloc_scb(adapter, scp))) { scp->result = (DID_ERROR << 16); *busy = 1; return NULL; } ccb = (mbox_ccb_t *)scb->ccb; scb->dev_channel = channel; scb->dev_target = target; scb->dma_direction = scp->sc_data_direction; mbox = ccb->mbox; mbox64 = ccb->mbox64; // Does this firmware support extended CDBs if (adapter->max_cdb_sz == 16) { mbox->cmd = MBOXCMD_EXTPTHRU; megaraid_mbox_prepare_epthru(adapter, scb, scp); mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; mbox64->xferaddr_hi = 0; mbox->xferaddr = 0xFFFFFFFF; } else { mbox->cmd = MBOXCMD_PASSTHRU64; megaraid_mbox_prepare_pthru(adapter, scb, scp); mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; mbox64->xferaddr_hi = 0; mbox->xferaddr = 0xFFFFFFFF; } return scb; } // NOT REACHED } /** * megaraid_mbox_runpendq - execute commands queued in the pending queue * @adapter : controller's soft state * @scb_q : SCB to be queued in the pending list * * Scan the pending list for commands which are not yet issued and try to * post to the controller. The SCB can be a null pointer, which would indicate * no SCB to be queue, just try to execute the ones in the pending list. * * NOTE: We do not actually traverse the pending list. The SCBs are plucked * out from the head of the pending list. If it is successfully issued, the * next SCB is at the head now. */ static void megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) { scb_t *scb; unsigned long flags; spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); if (scb_q) { scb_q->state = SCB_PENDQ; list_add_tail(&scb_q->list, &adapter->pend_list); } // if the adapter in not in quiescent mode, post the commands to FW if (adapter->quiescent) { spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); return; } while (!list_empty(&adapter->pend_list)) { assert_spin_locked(PENDING_LIST_LOCK(adapter)); scb = list_entry(adapter->pend_list.next, scb_t, list); // remove the scb from the pending list and try to // issue. If we are unable to issue it, put back in // the pending list and return list_del_init(&scb->list); spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); // if mailbox was busy, return SCB back to pending // list. Make sure to add at the head, since that's // where it would have been removed from scb->state = SCB_ISSUED; if (mbox_post_cmd(adapter, scb) != 0) { spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); scb->state = SCB_PENDQ; list_add(&scb->list, &adapter->pend_list); spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); return; } spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); } spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); return; } /** * megaraid_mbox_prepare_pthru - prepare a command for physical devices * @adapter : pointer to controller's soft state * @scb : scsi control block * @scp : scsi command from the mid-layer * * Prepare a command for the scsi physical devices. */ static void megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *scp) { mbox_ccb_t *ccb; mraid_passthru_t *pthru; uint8_t channel; uint8_t target; ccb = (mbox_ccb_t *)scb->ccb; pthru = ccb->pthru; channel = scb->dev_channel; target = scb->dev_target; // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout pthru->timeout = 4; pthru->ars = 1; pthru->islogical = 0; pthru->channel = 0; pthru->target = (channel << 4) | target; pthru->logdrv = SCP2LUN(scp); pthru->reqsenselen = 14; pthru->cdblen = scp->cmd_len; memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); if (scsi_bufflen(scp)) { pthru->dataxferlen = scsi_bufflen(scp); pthru->dataxferaddr = ccb->sgl_dma_h; pthru->numsge = megaraid_mbox_mksgl(adapter, scb); } else { pthru->dataxferaddr = 0; pthru->dataxferlen = 0; pthru->numsge = 0; } return; } /** * megaraid_mbox_prepare_epthru - prepare a command for physical devices * @adapter : pointer to controller's soft state * @scb : scsi control block * @scp : scsi command from the mid-layer * * Prepare a command for the scsi physical devices. This routine prepares * commands for devices which can take extended CDBs (>10 bytes). */ static void megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *scp) { mbox_ccb_t *ccb; mraid_epassthru_t *epthru; uint8_t channel; uint8_t target; ccb = (mbox_ccb_t *)scb->ccb; epthru = ccb->epthru; channel = scb->dev_channel; target = scb->dev_target; // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout epthru->timeout = 4; epthru->ars = 1; epthru->islogical = 0; epthru->channel = 0; epthru->target = (channel << 4) | target; epthru->logdrv = SCP2LUN(scp); epthru->reqsenselen = 14; epthru->cdblen = scp->cmd_len; memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); if (scsi_bufflen(scp)) { epthru->dataxferlen = scsi_bufflen(scp); epthru->dataxferaddr = ccb->sgl_dma_h; epthru->numsge = megaraid_mbox_mksgl(adapter, scb); } else { epthru->dataxferaddr = 0; epthru->dataxferlen = 0; epthru->numsge = 0; } return; } /** * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs * @adapter : controller's soft state * * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the * completed command and put them on the completed list for later processing. * * Returns: 1 if the interrupt is valid, 0 otherwise */ static int megaraid_ack_sequence(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox_t *mbox; scb_t *scb; uint8_t nstatus; uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; struct list_head clist; int handled; uint32_t dword; unsigned long flags; int i, j; mbox = raid_dev->mbox; // move the SCBs from the firmware completed array to our local list INIT_LIST_HEAD(&clist); // loop till F/W has more commands for us to complete handled = 0; spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); do { /* * Check if a valid interrupt is pending. If found, force the * interrupt line low. */ dword = RDOUTDOOR(raid_dev); if (dword != 0x10001234) break; handled = 1; WROUTDOOR(raid_dev, 0x10001234); nstatus = 0; // wait for valid numstatus to post for (i = 0; i < 0xFFFFF; i++) { if (mbox->numstatus != 0xFF) { nstatus = mbox->numstatus; break; } rmb(); } mbox->numstatus = 0xFF; adapter->outstanding_cmds -= nstatus; for (i = 0; i < nstatus; i++) { // wait for valid command index to post for (j = 0; j < 0xFFFFF; j++) { if (mbox->completed[i] != 0xFF) break; rmb(); } completed[i] = mbox->completed[i]; mbox->completed[i] = 0xFF; if (completed[i] == 0xFF) { con_log(CL_ANN, (KERN_CRIT "megaraid: command posting timed out\n")); BUG(); continue; } // Get SCB associated with this command id if (completed[i] >= MBOX_MAX_SCSI_CMDS) { // a cmm command scb = adapter->uscb_list + (completed[i] - MBOX_MAX_SCSI_CMDS); } else { // an os command scb = adapter->kscb_list + completed[i]; } scb->status = mbox->status; list_add_tail(&scb->list, &clist); } // Acknowledge interrupt WRINDOOR(raid_dev, 0x02); } while(1); spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); // put the completed commands in the completed list. DPC would // complete these commands later spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); list_splice(&clist, &adapter->completed_list); spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); // schedule the DPC if there is some work for it if (handled) tasklet_schedule(&adapter->dpc_h); return handled; } /** * megaraid_isr - isr for memory based mailbox based controllers * @irq : irq * @devp : pointer to our soft state * * Interrupt service routine for memory-mapped mailbox controllers. */ static irqreturn_t megaraid_isr(int irq, void *devp) { adapter_t *adapter = devp; int handled; handled = megaraid_ack_sequence(adapter); /* Loop through any pending requests */ if (!adapter->quiescent) { megaraid_mbox_runpendq(adapter, NULL); } return IRQ_RETVAL(handled); } /** * megaraid_mbox_dpc - the tasklet to complete the commands from completed list * @devp : pointer to HBA soft state * * Pick up the commands from the completed list and send back to the owners. * This is a reentrant function and does not assume any locks are held while * it is being called. */ static void megaraid_mbox_dpc(unsigned long devp) { adapter_t *adapter = (adapter_t *)devp; mraid_device_t *raid_dev; struct list_head clist; struct scatterlist *sgl; scb_t *scb; scb_t *tmp; struct scsi_cmnd *scp; mraid_passthru_t *pthru; mraid_epassthru_t *epthru; mbox_ccb_t *ccb; int islogical; int pdev_index; int pdev_state; mbox_t *mbox; unsigned long flags; uint8_t c; int status; uioc_t *kioc; if (!adapter) return; raid_dev = ADAP2RAIDDEV(adapter); // move the SCBs from the completed list to our local list INIT_LIST_HEAD(&clist); spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); list_splice_init(&adapter->completed_list, &clist); spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); list_for_each_entry_safe(scb, tmp, &clist, list) { status = scb->status; scp = scb->scp; ccb = (mbox_ccb_t *)scb->ccb; pthru = ccb->pthru; epthru = ccb->epthru; mbox = ccb->mbox; // Make sure f/w has completed a valid command if (scb->state != SCB_ISSUED) { con_log(CL_ANN, (KERN_CRIT "megaraid critical err: invalid command %d:%d:%p\n", scb->sno, scb->state, scp)); BUG(); continue; // Must never happen! } // check for the management command and complete it right away if (scb->sno >= MBOX_MAX_SCSI_CMDS) { scb->state = SCB_FREE; scb->status = status; // remove from local clist list_del_init(&scb->list); kioc = (uioc_t *)scb->gp; kioc->status = 0; megaraid_mbox_mm_done(adapter, scb); continue; } // Was an abort issued for this command earlier if (scb->state & SCB_ABORT) { con_log(CL_ANN, (KERN_NOTICE "megaraid: aborted cmd [%x] completed\n", scb->sno)); } /* * If the inquiry came of a disk drive which is not part of * any RAID array, expose it to the kernel. For this to be * enabled, user must set the "megaraid_expose_unconf_disks" * flag to 1 by specifying it on module parameter list. * This would enable data migration off drives from other * configurations. */ islogical = MRAID_IS_LOGICAL(adapter, scp); if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 && IS_RAID_CH(raid_dev, scb->dev_channel)) { sgl = scsi_sglist(scp); if (sg_page(sgl)) { c = *(unsigned char *) sg_virt(&sgl[0]); } else { con_log(CL_ANN, (KERN_WARNING "megaraid mailbox: invalid sg:%d\n", __LINE__)); c = 0; } if ((c & 0x1F ) == TYPE_DISK) { pdev_index = (scb->dev_channel * 16) + scb->dev_target; pdev_state = raid_dev->pdrv_state[pdev_index] & 0x0F; if (pdev_state == PDRV_ONLINE || pdev_state == PDRV_FAILED || pdev_state == PDRV_RBLD || pdev_state == PDRV_HOTSPARE || megaraid_expose_unconf_disks == 0) { status = 0xF0; } } } // Convert MegaRAID status to Linux error code switch (status) { case 0x00: scp->result = (DID_OK << 16); break; case 0x02: /* set sense_buffer and result fields */ if (mbox->cmd == MBOXCMD_PASSTHRU || mbox->cmd == MBOXCMD_PASSTHRU64) { memcpy(scp->sense_buffer, pthru->reqsensearea, 14); scp->result = SAM_STAT_CHECK_CONDITION; } else { if (mbox->cmd == MBOXCMD_EXTPTHRU) { memcpy(scp->sense_buffer, epthru->reqsensearea, 14); scp->result = SAM_STAT_CHECK_CONDITION; } else scsi_build_sense(scp, 0, ABORTED_COMMAND, 0, 0); } break; case 0x08: scp->result = DID_BUS_BUSY << 16 | status; break; default: /* * If TEST_UNIT_READY fails, we know RESERVATION_STATUS * failed */ if (scp->cmnd[0] == TEST_UNIT_READY) { scp->result = DID_ERROR << 16 | SAM_STAT_RESERVATION_CONFLICT; } else /* * Error code returned is 1 if Reserve or Release * failed or the input parameter is invalid */ if (status == 1 && (scp->cmnd[0] == RESERVE_6 || scp->cmnd[0] == RELEASE_6)) { scp->result = DID_ERROR << 16 | SAM_STAT_RESERVATION_CONFLICT; } else { scp->result = DID_BAD_TARGET << 16 | status; } } // print a debug message for all failed commands if (status) { megaraid_mbox_display_scb(adapter, scb); } scsi_dma_unmap(scp); // remove from local clist list_del_init(&scb->list); // put back in free list megaraid_dealloc_scb(adapter, scb); // send the scsi packet back to kernel scsi_done(scp); } return; } /** * megaraid_abort_handler - abort the scsi command * @scp : command to be aborted * * Abort a previous SCSI request. Only commands on the pending list can be * aborted. All the commands issued to the F/W must complete. **/ static int megaraid_abort_handler(struct scsi_cmnd *scp) { adapter_t *adapter; mraid_device_t *raid_dev; scb_t *scb; scb_t *tmp; int found; unsigned long flags; int i; adapter = SCP2ADAPTER(scp); raid_dev = ADAP2RAIDDEV(adapter); con_log(CL_ANN, (KERN_WARNING "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", scp->cmnd[0], SCP2CHANNEL(scp), SCP2TARGET(scp), SCP2LUN(scp))); // If FW has stopped responding, simply return failure if (raid_dev->hw_error) { con_log(CL_ANN, (KERN_NOTICE "megaraid: hw error, not aborting\n")); return FAILED; } // There might a race here, where the command was completed by the // firmware and now it is on the completed list. Before we could // complete the command to the kernel in dpc, the abort came. // Find out if this is the case to avoid the race. scb = NULL; spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { if (scb->scp == scp) { // Found command list_del_init(&scb->list); // from completed list con_log(CL_ANN, (KERN_WARNING "megaraid: %d[%d:%d], abort from completed list\n", scb->sno, scb->dev_channel, scb->dev_target)); scp->result = (DID_ABORT << 16); scsi_done(scp); megaraid_dealloc_scb(adapter, scb); spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); return SUCCESS; } } spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); // Find out if this command is still on the pending list. If it is and // was never issued, abort and return success. If the command is owned // by the firmware, we must wait for it to complete by the FW. spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { if (scb->scp == scp) { // Found command list_del_init(&scb->list); // from pending list ASSERT(!(scb->state & SCB_ISSUED)); con_log(CL_ANN, (KERN_WARNING "megaraid abort: [%d:%d], driver owner\n", scb->dev_channel, scb->dev_target)); scp->result = (DID_ABORT << 16); scsi_done(scp); megaraid_dealloc_scb(adapter, scb); spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); return SUCCESS; } } spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); // Check do we even own this command, in which case this would be // owned by the firmware. The only way to locate the FW scb is to // traverse through the list of all SCB, since driver does not // maintain these SCBs on any list found = 0; spin_lock_irq(&adapter->lock); for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { scb = adapter->kscb_list + i; if (scb->scp == scp) { found = 1; if (!(scb->state & SCB_ISSUED)) { con_log(CL_ANN, (KERN_WARNING "megaraid abort: %d[%d:%d], invalid state\n", scb->sno, scb->dev_channel, scb->dev_target)); BUG(); } else { con_log(CL_ANN, (KERN_WARNING "megaraid abort: %d[%d:%d], fw owner\n", scb->sno, scb->dev_channel, scb->dev_target)); } } } spin_unlock_irq(&adapter->lock); if (!found) { con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); // FIXME: Should there be a callback for this command? return SUCCESS; } // We cannot actually abort a command owned by firmware, return // failure and wait for reset. In host reset handler, we will find out // if the HBA is still live return FAILED; } /** * megaraid_reset_handler - device reset handler for mailbox based driver * @scp : reference command * * Reset handler for the mailbox based controller. First try to find out if * the FW is still live, in which case the outstanding commands counter mut go * down to 0. If that happens, also issue the reservation reset command to * relinquish (possible) reservations on the logical drives connected to this * host. **/ static int megaraid_reset_handler(struct scsi_cmnd *scp) { adapter_t *adapter; scb_t *scb; scb_t *tmp; mraid_device_t *raid_dev; unsigned long flags; uint8_t raw_mbox[sizeof(mbox_t)]; int rval; int recovery_window; int i; uioc_t *kioc; adapter = SCP2ADAPTER(scp); raid_dev = ADAP2RAIDDEV(adapter); // return failure if adapter is not responding if (raid_dev->hw_error) { con_log(CL_ANN, (KERN_NOTICE "megaraid: hw error, cannot reset\n")); return FAILED; } // Under exceptional conditions, FW can take up to 3 minutes to // complete command processing. Wait for additional 2 minutes for the // pending commands counter to go down to 0. If it doesn't, let the // controller be marked offline // Also, reset all the commands currently owned by the driver spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { list_del_init(&scb->list); // from pending list if (scb->sno >= MBOX_MAX_SCSI_CMDS) { con_log(CL_ANN, (KERN_WARNING "megaraid: IOCTL packet with %d[%d:%d] being reset\n", scb->sno, scb->dev_channel, scb->dev_target)); scb->status = -1; kioc = (uioc_t *)scb->gp; kioc->status = -EFAULT; megaraid_mbox_mm_done(adapter, scb); } else { if (scb->scp == scp) { // Found command con_log(CL_ANN, (KERN_WARNING "megaraid: %d[%d:%d], reset from pending list\n", scb->sno, scb->dev_channel, scb->dev_target)); } else { con_log(CL_ANN, (KERN_WARNING "megaraid: IO packet with %d[%d:%d] being reset\n", scb->sno, scb->dev_channel, scb->dev_target)); } scb->scp->result = (DID_RESET << 16); scsi_done(scb->scp); megaraid_dealloc_scb(adapter, scb); } } spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); if (adapter->outstanding_cmds) { con_log(CL_ANN, (KERN_NOTICE "megaraid: %d outstanding commands. Max wait %d sec\n", adapter->outstanding_cmds, (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); } recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; for (i = 0; i < recovery_window; i++) { megaraid_ack_sequence(adapter); // print a message once every 5 seconds only if (!(i % 5)) { con_log(CL_ANN, ( "megaraid mbox: Wait for %d commands to complete:%d\n", adapter->outstanding_cmds, (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); } // bailout if no recovery happened in reset time if (adapter->outstanding_cmds == 0) { break; } msleep(1000); } spin_lock(&adapter->lock); // If still outstanding commands, bail out if (adapter->outstanding_cmds) { con_log(CL_ANN, (KERN_WARNING "megaraid mbox: critical hardware error!\n")); raid_dev->hw_error = 1; rval = FAILED; goto out; } else { con_log(CL_ANN, (KERN_NOTICE "megaraid mbox: reset sequence completed successfully\n")); } // If the controller supports clustering, reset reservations if (!adapter->ha) { rval = SUCCESS; goto out; } // clear reservations if any raw_mbox[0] = CLUSTER_CMD; raw_mbox[2] = RESET_RESERVATIONS; rval = SUCCESS; if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { con_log(CL_ANN, (KERN_INFO "megaraid: reservation reset\n")); } else { rval = FAILED; con_log(CL_ANN, (KERN_WARNING "megaraid: reservation reset failed\n")); } out: spin_unlock(&adapter->lock); return rval; } /* * START: internal commands library * * This section of the driver has the common routine used by the driver and * also has all the FW routines */ /** * mbox_post_sync_cmd() - blocking command to the mailbox based controllers * @adapter : controller's soft state * @raw_mbox : the mailbox * * Issue a scb in synchronous and non-interrupt mode for mailbox based * controllers. */ static int mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox_t *mbox; uint8_t status; int i; mbox = raid_dev->mbox; /* * Wait until mailbox is free */ if (megaraid_busywait_mbox(raid_dev) != 0) goto blocked_mailbox; /* * Copy mailbox data into host structure */ memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); mbox->cmdid = 0xFE; mbox->busy = 1; mbox->poll = 0; mbox->ack = 0; mbox->numstatus = 0xFF; mbox->status = 0xFF; wmb(); WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); // wait for maximum 1 second for status to post. If the status is not // available within 1 second, assume FW is initializing and wait // for an extended amount of time if (mbox->numstatus == 0xFF) { // status not yet available udelay(25); for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { rmb(); msleep(1); } if (i == 1000) { con_log(CL_ANN, (KERN_NOTICE "megaraid mailbox: wait for FW to boot ")); for (i = 0; (mbox->numstatus == 0xFF) && (i < MBOX_RESET_WAIT); i++) { rmb(); con_log(CL_ANN, ("\b\b\b\b\b[%03d]", MBOX_RESET_WAIT - i)); msleep(1000); } if (i == MBOX_RESET_WAIT) { con_log(CL_ANN, ( "\nmegaraid mailbox: status not available\n")); return -1; } con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); } } // wait for maximum 1 second for poll semaphore if (mbox->poll != 0x77) { udelay(25); for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { rmb(); msleep(1); } if (i == 1000) { con_log(CL_ANN, (KERN_WARNING "megaraid mailbox: could not get poll semaphore\n")); return -1; } } WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); wmb(); // wait for maximum 1 second for acknowledgement if (RDINDOOR(raid_dev) & 0x2) { udelay(25); for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { rmb(); msleep(1); } if (i == 1000) { con_log(CL_ANN, (KERN_WARNING "megaraid mailbox: could not acknowledge\n")); return -1; } } mbox->poll = 0; mbox->ack = 0x77; status = mbox->status; // invalidate the completed command id array. After command // completion, firmware would write the valid id. mbox->numstatus = 0xFF; mbox->status = 0xFF; for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { mbox->completed[i] = 0xFF; } return status; blocked_mailbox: con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); return -1; } /** * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers * @adapter : controller's soft state * @raw_mbox : the mailbox * * Issue a scb in synchronous and non-interrupt mode for mailbox based * controllers. This is a faster version of the synchronous command and * therefore can be called in interrupt-context as well. */ static int mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox_t *mbox; long i; mbox = raid_dev->mbox; // return immediately if the mailbox is busy if (mbox->busy) return -1; // Copy mailbox data into host structure memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); mbox->cmdid = 0xFE; mbox->busy = 1; mbox->poll = 0; mbox->ack = 0; mbox->numstatus = 0xFF; mbox->status = 0xFF; wmb(); WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { if (mbox->numstatus != 0xFF) break; rmb(); udelay(MBOX_SYNC_DELAY_200); } if (i == MBOX_SYNC_WAIT_CNT) { // We may need to re-calibrate the counter con_log(CL_ANN, (KERN_CRIT "megaraid: fast sync command timed out\n")); } WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); wmb(); return mbox->status; } /** * megaraid_busywait_mbox() - Wait until the controller's mailbox is available * @raid_dev : RAID device (HBA) soft state * * Wait until the controller's mailbox is available to accept more commands. * Wait for at most 1 second. */ static int megaraid_busywait_mbox(mraid_device_t *raid_dev) { mbox_t *mbox = raid_dev->mbox; int i = 0; if (mbox->busy) { udelay(25); for (i = 0; mbox->busy && i < 1000; i++) msleep(1); } if (i < 1000) return 0; else return -1; } /** * megaraid_mbox_product_info - some static information about the controller * @adapter : our soft state * * Issue commands to the controller to grab some parameters required by our * caller. */ static int megaraid_mbox_product_info(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; mraid_pinfo_t *pinfo; dma_addr_t pinfo_dma_h; mraid_inquiry3_t *mraid_inq3; int i; memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); mbox = (mbox_t *)raw_mbox; /* * Issue an ENQUIRY3 command to find out certain adapter parameters, * e.g., max channels, max commands etc. */ pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), &pinfo_dma_h, GFP_KERNEL); if (pinfo == NULL) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); return -1; } mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); raw_mbox[0] = FC_NEW_CONFIG; raw_mbox[2] = NC_SUBOP_ENQUIRY3; raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; // Issue the command if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo, pinfo_dma_h); return -1; } /* * Collect information about state of each physical drive * attached to the controller. We will expose all the disks * which are not part of RAID */ mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; } /* * Get product info for information like number of channels, * maximum commands supported. */ memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); mbox->xferaddr = (uint32_t)pinfo_dma_h; raw_mbox[0] = FC_NEW_CONFIG; raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid: product info failed\n")); dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo, pinfo_dma_h); return -1; } /* * Setup some parameters for host, as required by our caller */ adapter->max_channel = pinfo->nchannels; /* * we will export all the logical drives on a single channel. * Add 1 since inquires do not come for inititor ID */ adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; adapter->max_lun = 8; // up to 8 LUNs for non-disk devices /* * These are the maximum outstanding commands for the scsi-layer */ adapter->max_cmds = MBOX_MAX_SCSI_CMDS; memset(adapter->fw_version, 0, VERSION_SIZE); memset(adapter->bios_version, 0, VERSION_SIZE); memcpy(adapter->fw_version, pinfo->fw_version, 4); adapter->fw_version[4] = 0; memcpy(adapter->bios_version, pinfo->bios_version, 4); adapter->bios_version[4] = 0; con_log(CL_ANN, (KERN_NOTICE "megaraid: fw version:[%s] bios version:[%s]\n", adapter->fw_version, adapter->bios_version)); dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo, pinfo_dma_h); return 0; } /** * megaraid_mbox_extended_cdb - check for support for extended CDBs * @adapter : soft state for the controller * * This routine check whether the controller in question supports extended * ( > 10 bytes ) CDBs. */ static int megaraid_mbox_extended_cdb(adapter_t *adapter) { mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; int rval; mbox = (mbox_t *)raw_mbox; memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); raw_mbox[0] = MAIN_MISC_OPCODE; raw_mbox[2] = SUPPORT_EXT_CDB; /* * Issue the command */ rval = 0; if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { rval = -1; } return rval; } /** * megaraid_mbox_support_ha - Do we support clustering * @adapter : soft state for the controller * @init_id : ID of the initiator * * Determine if the firmware supports clustering and the ID of the initiator. */ static int megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) { mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; int rval; mbox = (mbox_t *)raw_mbox; memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); raw_mbox[0] = GET_TARGET_ID; // Issue the command *init_id = 7; rval = -1; if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { *init_id = *(uint8_t *)adapter->ibuf; con_log(CL_ANN, (KERN_INFO "megaraid: cluster firmware, initiator ID: %d\n", *init_id)); rval = 0; } return rval; } /** * megaraid_mbox_support_random_del - Do we support random deletion * @adapter : soft state for the controller * * Determine if the firmware supports random deletion. * Return: 1 is operation supported, 0 otherwise */ static int megaraid_mbox_support_random_del(adapter_t *adapter) { uint8_t raw_mbox[sizeof(mbox_t)]; int rval; /* * Newer firmware on Dell CERC expect a different * random deletion handling, so disable it. */ if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && (adapter->fw_version[0] > '6' || (adapter->fw_version[0] == '6' && adapter->fw_version[2] > '6') || (adapter->fw_version[0] == '6' && adapter->fw_version[2] == '6' && adapter->fw_version[3] > '1'))) { con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); return 0; } memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); raw_mbox[0] = FC_DEL_LOGDRV; raw_mbox[2] = OP_SUP_DEL_LOGDRV; // Issue the command rval = 0; if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); rval = 1; } return rval; } /** * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware * @adapter : soft state for the controller * * Find out the maximum number of scatter-gather elements supported by the * firmware. */ static int megaraid_mbox_get_max_sg(adapter_t *adapter) { mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; int nsg; mbox = (mbox_t *)raw_mbox; memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); raw_mbox[0] = MAIN_MISC_OPCODE; raw_mbox[2] = GET_MAX_SG_SUPPORT; // Issue the command if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { nsg = *(uint8_t *)adapter->ibuf; } else { nsg = MBOX_DEFAULT_SG_SIZE; } if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; return nsg; } /** * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels * @adapter : soft state for the controller * * Enumerate the RAID and SCSI channels for ROMB platforms so that channels * can be exported as regular SCSI channels. */ static void megaraid_mbox_enum_raid_scsi(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; mbox = (mbox_t *)raw_mbox; memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); raw_mbox[0] = CHNL_CLASS; raw_mbox[2] = GET_CHNL_CLASS; // Issue the command. If the command fails, all channels are RAID // channels raid_dev->channel_class = 0xFF; if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { raid_dev->channel_class = *(uint8_t *)adapter->ibuf; } return; } /** * megaraid_mbox_flush_cache - flush adapter and disks cache * @adapter : soft state for the controller * * Flush adapter cache followed by disks cache. */ static void megaraid_mbox_flush_cache(adapter_t *adapter) { uint8_t raw_mbox[sizeof(mbox_t)]; memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); raw_mbox[0] = FLUSH_ADAPTER; if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { con_log(CL_ANN, ("megaraid: flush adapter failed\n")); } raw_mbox[0] = FLUSH_SYSTEM; if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); } return; } /** * megaraid_mbox_fire_sync_cmd - fire the sync cmd * @adapter : soft state for the controller * * Clears the pending cmds in FW and reinits its RAID structs. */ static int megaraid_mbox_fire_sync_cmd(adapter_t *adapter) { mbox_t *mbox; uint8_t raw_mbox[sizeof(mbox_t)]; mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); int status = 0; int i; uint32_t dword; memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); raw_mbox[0] = 0xFF; mbox = raid_dev->mbox; /* Wait until mailbox is free */ if (megaraid_busywait_mbox(raid_dev) != 0) { status = 1; goto blocked_mailbox; } /* Copy mailbox data into host structure */ memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); mbox->cmdid = 0xFE; mbox->busy = 1; mbox->poll = 0; mbox->ack = 0; mbox->numstatus = 0; mbox->status = 0; wmb(); WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); /* Wait for maximum 1 min for status to post. * If the Firmware SUPPORTS the ABOVE COMMAND, * mbox->cmd will be set to 0 * else * the firmware will reject the command with * mbox->numstatus set to 1 */ i = 0; status = 0; while (!mbox->numstatus && mbox->cmd == 0xFF) { rmb(); msleep(1); i++; if (i > 1000 * 60) { status = 1; break; } } if (mbox->numstatus == 1) status = 1; /*cmd not supported*/ /* Check for interrupt line */ dword = RDOUTDOOR(raid_dev); WROUTDOOR(raid_dev, dword); WRINDOOR(raid_dev,2); return status; blocked_mailbox: con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); return status; } /** * megaraid_mbox_display_scb - display SCB information, mostly debug purposes * @adapter : controller's soft state * @scb : SCB to be displayed * * Diplay information about the given SCB iff the current debug level is * verbose. */ static void megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) { mbox_ccb_t *ccb; struct scsi_cmnd *scp; mbox_t *mbox; int level; int i; ccb = (mbox_ccb_t *)scb->ccb; scp = scb->scp; mbox = ccb->mbox; level = CL_DLEVEL3; con_log(level, (KERN_NOTICE "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, mbox->cmd, scb->sno)); con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, mbox->numsge)); if (!scp) return; con_log(level, (KERN_NOTICE "scsi cmnd: ")); for (i = 0; i < scp->cmd_len; i++) { con_log(level, ("%#2.02x ", scp->cmnd[i])); } con_log(level, ("\n")); return; } /** * megaraid_mbox_setup_device_map - manage device ids * @adapter : Driver's soft state * * Manage the device ids to have an appropriate mapping between the kernel * scsi addresses and megaraid scsi and logical drive addresses. We export * scsi devices on their actual addresses, whereas the logical drives are * exported on a virtual scsi channel. */ static void megaraid_mbox_setup_device_map(adapter_t *adapter) { uint8_t c; uint8_t t; /* * First fill the values on the logical drive channel */ for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) adapter->device_ids[adapter->max_channel][t] = (t < adapter->init_id) ? t : t - 1; adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; /* * Fill the values on the physical devices channels */ for (c = 0; c < adapter->max_channel; c++) for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) adapter->device_ids[c][t] = (c << 8) | t; } /* * END: internal commands library */ /* * START: Interface for the common management module * * This is the module, which interfaces with the common management module to * provide support for ioctl and sysfs */ /** * megaraid_cmm_register - register with the management module * @adapter : HBA soft state * * Register with the management module, which allows applications to issue * ioctl calls to the drivers. This interface is used by the management module * to setup sysfs support as well. */ static int megaraid_cmm_register(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); mraid_mmadp_t adp; scb_t *scb; mbox_ccb_t *ccb; int rval; int i; // Allocate memory for the base list of scb for management module. adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); if (adapter->uscb_list == NULL) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); return -1; } // Initialize the synchronization parameters for resources for // commands for management module INIT_LIST_HEAD(&adapter->uscb_pool); spin_lock_init(USER_FREE_LIST_LOCK(adapter)); // link all the packets. Note, CCB for commands, coming from the // commom management module, mailbox physical address are already // setup by it. We just need placeholder for that in our local command // control blocks for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { scb = adapter->uscb_list + i; ccb = raid_dev->uccb_list + i; scb->ccb = (caddr_t)ccb; ccb->mbox64 = raid_dev->umbox64 + i; ccb->mbox = &ccb->mbox64->mbox32; ccb->raw_mbox = (uint8_t *)ccb->mbox; scb->gp = 0; // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) scb->sno = i + MBOX_MAX_SCSI_CMDS; scb->scp = NULL; scb->state = SCB_FREE; scb->dma_direction = DMA_NONE; scb->dma_type = MRAID_DMA_NONE; scb->dev_channel = -1; scb->dev_target = -1; // put scb in the free pool list_add_tail(&scb->list, &adapter->uscb_pool); } adp.unique_id = adapter->unique_id; adp.drvr_type = DRVRTYPE_MBOX; adp.drvr_data = (unsigned long)adapter; adp.pdev = adapter->pdev; adp.issue_uioc = megaraid_mbox_mm_handler; adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; adp.max_kioc = MBOX_MAX_USER_CMDS; if ((rval = mraid_mm_register_adp(&adp)) != 0) { con_log(CL_ANN, (KERN_WARNING "megaraid mbox: did not register with CMM\n")); kfree(adapter->uscb_list); } return rval; } /** * megaraid_cmm_unregister - un-register with the management module * @adapter : HBA soft state * * Un-register with the management module. * FIXME: mgmt module must return failure for unregister if it has pending * commands in LLD. */ static int megaraid_cmm_unregister(adapter_t *adapter) { kfree(adapter->uscb_list); mraid_mm_unregister_adp(adapter->unique_id); return 0; } /** * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD * @drvr_data : LLD specific data * @kioc : CMM interface packet * @action : command action * * This routine is invoked whenever the Common Management Module (CMM) has a * command for us. The 'action' parameter specifies if this is a new command * or otherwise. */ static int megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) { adapter_t *adapter; if (action != IOCTL_ISSUE) { con_log(CL_ANN, (KERN_WARNING "megaraid: unsupported management action:%#2x\n", action)); return (-ENOTSUPP); } adapter = (adapter_t *)drvr_data; // make sure this adapter is not being detached right now. if (atomic_read(&adapter->being_detached)) { con_log(CL_ANN, (KERN_WARNING "megaraid: reject management request, detaching\n")); return (-ENODEV); } switch (kioc->opcode) { case GET_ADAP_INFO: kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) (unsigned long)kioc->buf_vaddr); kioc->done(kioc); return kioc->status; case MBOX_CMD: return megaraid_mbox_mm_command(adapter, kioc); default: kioc->status = (-EINVAL); kioc->done(kioc); return (-EINVAL); } return 0; // not reached } /** * megaraid_mbox_mm_command - issues commands routed through CMM * @adapter : HBA soft state * @kioc : management command packet * * Issues commands, which are routed through the management module. */ static int megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) { struct list_head *head = &adapter->uscb_pool; mbox64_t *mbox64; uint8_t *raw_mbox; scb_t *scb; mbox_ccb_t *ccb; unsigned long flags; // detach one scb from free pool spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); if (list_empty(head)) { // should never happen because of CMM con_log(CL_ANN, (KERN_WARNING "megaraid mbox: bug in cmm handler, lost resources\n")); spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); return (-EINVAL); } scb = list_entry(head->next, scb_t, list); list_del_init(&scb->list); spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); scb->state = SCB_ACTIVE; scb->dma_type = MRAID_DMA_NONE; scb->dma_direction = DMA_NONE; ccb = (mbox_ccb_t *)scb->ccb; mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; raw_mbox = (uint8_t *)&mbox64->mbox32; memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); scb->gp = (unsigned long)kioc; /* * If it is a logdrv random delete operation, we have to wait till * there are no outstanding cmds at the fw and then issue it directly */ if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { if (wait_till_fw_empty(adapter)) { con_log(CL_ANN, (KERN_NOTICE "megaraid mbox: LD delete, timed out\n")); kioc->status = -ETIME; scb->status = -1; megaraid_mbox_mm_done(adapter, scb); return (-ETIME); } INIT_LIST_HEAD(&scb->list); scb->state = SCB_ISSUED; if (mbox_post_cmd(adapter, scb) != 0) { con_log(CL_ANN, (KERN_NOTICE "megaraid mbox: LD delete, mailbox busy\n")); kioc->status = -EBUSY; scb->status = -1; megaraid_mbox_mm_done(adapter, scb); return (-EBUSY); } return 0; } // put the command on the pending list and execute megaraid_mbox_runpendq(adapter, scb); return 0; } static int wait_till_fw_empty(adapter_t *adapter) { unsigned long flags = 0; int i; /* * Set the quiescent flag to stop issuing cmds to FW. */ spin_lock_irqsave(&adapter->lock, flags); adapter->quiescent++; spin_unlock_irqrestore(&adapter->lock, flags); /* * Wait till there are no more cmds outstanding at FW. Try for at most * 60 seconds */ for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { con_log(CL_DLEVEL1, (KERN_INFO "megaraid: FW has %d pending commands\n", adapter->outstanding_cmds)); msleep(1000); } return adapter->outstanding_cmds; } /** * megaraid_mbox_mm_done - callback for CMM commands * @adapter : HBA soft state * @scb : completed command * * Callback routine for internal commands originated from the management * module. */ static void megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) { uioc_t *kioc; mbox64_t *mbox64; uint8_t *raw_mbox; unsigned long flags; kioc = (uioc_t *)scb->gp; mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; mbox64->mbox32.status = scb->status; raw_mbox = (uint8_t *)&mbox64->mbox32; // put scb in the free pool scb->state = SCB_FREE; scb->scp = NULL; spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); list_add(&scb->list, &adapter->uscb_pool); spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); // if a delete logical drive operation succeeded, restart the // controller if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { adapter->quiescent--; megaraid_mbox_runpendq(adapter, NULL); } kioc->done(kioc); return; } /** * gather_hbainfo - HBA characteristics for the applications * @adapter : HBA soft state * @hinfo : pointer to the caller's host info strucuture */ static int gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) { hinfo->pci_vendor_id = adapter->pdev->vendor; hinfo->pci_device_id = adapter->pdev->device; hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; hinfo->subsys_device_id = adapter->pdev->subsystem_device; hinfo->pci_bus = adapter->pdev->bus->number; hinfo->pci_dev_fn = adapter->pdev->devfn; hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); hinfo->irq = adapter->host->irq; hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; hinfo->host_no = adapter->host->host_no; return 0; } /* * END: Interface for the common management module */ /** * megaraid_sysfs_alloc_resources - allocate sysfs related resources * @adapter : controller's soft state * * Allocate packets required to issue FW calls whenever the sysfs attributes * are read. These attributes would require up-to-date information from the * FW. Also set up resources for mutual exclusion to share these resources and * the wait queue. * * Return 0 on success. * Return -ERROR_CODE on failure. */ static int megaraid_sysfs_alloc_resources(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); int rval = 0; raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev, PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL); if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || !raid_dev->sysfs_buffer) { con_log(CL_ANN, (KERN_WARNING "megaraid: out of memory, %s %d\n", __func__, __LINE__)); rval = -ENOMEM; megaraid_sysfs_free_resources(adapter); } mutex_init(&raid_dev->sysfs_mtx); init_waitqueue_head(&raid_dev->sysfs_wait_q); return rval; } /** * megaraid_sysfs_free_resources - free sysfs related resources * @adapter : controller's soft state * * Free packets allocated for sysfs FW commands */ static void megaraid_sysfs_free_resources(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); kfree(raid_dev->sysfs_uioc); kfree(raid_dev->sysfs_mbox64); if (raid_dev->sysfs_buffer) { dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE, raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); } } /** * megaraid_sysfs_get_ldmap_done - callback for get ldmap * @uioc : completed packet * * Callback routine called in the ISR/tasklet context for get ldmap call */ static void megaraid_sysfs_get_ldmap_done(uioc_t *uioc) { adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); uioc->status = 0; wake_up(&raid_dev->sysfs_wait_q); } /** * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap * @t : timed out timer * * Timeout routine to recover and return to application, in case the adapter * has stopped responding. A timeout of 60 seconds for this command seems like * a good value. */ static void megaraid_sysfs_get_ldmap_timeout(struct timer_list *t) { struct uioc_timeout *timeout = timer_container_of(timeout, t, timer); uioc_t *uioc = timeout->uioc; adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); uioc->status = -ETIME; wake_up(&raid_dev->sysfs_wait_q); } /** * megaraid_sysfs_get_ldmap - get update logical drive map * @adapter : controller's soft state * * This routine will be called whenever user reads the logical drive * attributes, go get the current logical drive mapping table from the * firmware. We use the management API's to issue commands to the controller. * * NOTE: The commands issuance functionality is not generalized and * implemented in context of "get ld map" command only. If required, the * command issuance logical can be trivially pulled out and implemented as a * standalone library. For now, this should suffice since there is no other * user of this interface. * * Return 0 on success. * Return -1 on failure. */ static int megaraid_sysfs_get_ldmap(adapter_t *adapter) { mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); uioc_t *uioc; mbox64_t *mbox64; mbox_t *mbox; char *raw_mbox; struct uioc_timeout timeout; caddr_t ldmap; int rval = 0; /* * Allow only one read at a time to go through the sysfs attributes */ mutex_lock(&raid_dev->sysfs_mtx); uioc = raid_dev->sysfs_uioc; mbox64 = raid_dev->sysfs_mbox64; ldmap = raid_dev->sysfs_buffer; memset(uioc, 0, sizeof(uioc_t)); memset(mbox64, 0, sizeof(mbox64_t)); memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); mbox = &mbox64->mbox32; raw_mbox = (char *)mbox; uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; uioc->buf_vaddr = (caddr_t)adapter; uioc->status = -ENODATA; uioc->done = megaraid_sysfs_get_ldmap_done; /* * Prepare the mailbox packet to get the current logical drive mapping * table */ mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; raw_mbox[0] = FC_DEL_LOGDRV; raw_mbox[2] = OP_GET_LDID_MAP; /* * Setup a timer to recover from a non-responding controller */ timeout.uioc = uioc; timer_setup_on_stack(&timeout.timer, megaraid_sysfs_get_ldmap_timeout, 0); timeout.timer.expires = jiffies + 60 * HZ; add_timer(&timeout.timer); /* * Send the command to the firmware */ rval = megaraid_mbox_mm_command(adapter, uioc); if (rval == 0) { // command successfully issued wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); /* * Check if the command timed out */ if (uioc->status == -ETIME) { con_log(CL_ANN, (KERN_NOTICE "megaraid: sysfs get ld map timed out\n")); rval = -ETIME; } else { rval = mbox->status; } if (rval == 0) { memcpy(raid_dev->curr_ldmap, ldmap, sizeof(raid_dev->curr_ldmap)); } else { con_log(CL_ANN, (KERN_NOTICE "megaraid: get ld map failed with %x\n", rval)); } } else { con_log(CL_ANN, (KERN_NOTICE "megaraid: could not issue ldmap command:%x\n", rval)); } timer_delete_sync(&timeout.timer); timer_destroy_on_stack(&timeout.timer); mutex_unlock(&raid_dev->sysfs_mtx); return rval; } /** * megaraid_mbox_app_hndl_show - display application handle for this adapter * @dev : class device object representation for the host * @attr : device attribute (unused) * @buf : buffer to send data to * * Display the handle used by the applications while executing management * tasks on the adapter. We invoke a management module API to get the adapter * handle, since we do not interface with applications directly. */ static ssize_t megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *bu { struct Scsi_Host *shost = class_to_shost(dev); adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); uint32_t app_hndl; app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); return sysfs_emit(buf, "%u\n", app_hndl); } /** * megaraid_mbox_ld_show - display the logical drive number for this device * @dev : device object representation for the scsi device * @attr : device attribute to show * @buf : buffer to send data to * * Display the logical drive number for the device in question, if it a valid * logical drive. For physical devices, "-1" is returned. * * The logical drive number is displayed in following format: * * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> * * <int> <int> <int> <int> */ static ssize_t megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); int scsi_id = -1; int logical_drv = -1; int ldid_map = -1; uint32_t app_hndl = 0; int mapped_sdev_id; int rval; int i; if (raid_dev->random_del_supported && MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { rval = megaraid_sysfs_get_ldmap(adapter); if (rval == 0) { for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { mapped_sdev_id = sdev->id; if (sdev->id > adapter->init_id) { mapped_sdev_id -= 1; } if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { scsi_id = sdev->id; logical_drv = i; ldid_map = raid_dev->curr_ldmap[i]; app_hndl = mraid_mm_adapter_app_handle( adapter->unique_id); break; } } } else { con_log(CL_ANN, (KERN_NOTICE "megaraid: sysfs get ld map failed: %x\n", rval)); } } return sysfs_emit(buf, "%d %d %d %d\n", scsi_id, logical_drv, ldid_map, app_hndl); } /* * END: Mailbox Low Level Driver */ module_init(megaraid_init); module_exit(megaraid_exit);
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2026-08-25