diff options
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mbox.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mbox.c | 4141 |
1 files changed, 4141 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c new file mode 100644 index 000000000..530358cdc --- /dev/null +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -0,0 +1,4141 @@ +/* + * + * Linux MegaRAID device driver + * + * Copyright (c) 2003-2004 LSI Logic Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * 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_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *); +static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); + +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 = 0; +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)"); + +/* + * ### global data ### + */ +static uint8_t megaraid_mbox_version[8] = + { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; + + +/* + * PCI table for all supported controllers. + */ +static 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) + +DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, + NULL); + +// Host template initializer for megaraid mbox sysfs device attributes +static struct device_attribute *megaraid_shost_attrs[] = { + &dev_attr_megaraid_mbox_app_hndl, + NULL, +}; + + +DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); + +// Host template initializer for megaraid mbox sysfs device attributes +static struct device_attribute *megaraid_sdev_attrs[] = { + &dev_attr_megaraid_mbox_ld, + NULL, +}; + +/* + * Scsi host template for megaraid unified driver + */ +static 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, + .use_clustering = ENABLE_CLUSTERING, + .no_write_same = 1, + .sdev_attrs = megaraid_sdev_attrs, + .shost_attrs = megaraid_shost_attrs, +}; + + +/** + * 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 = pdev->bus->number << 8 | pdev->devfn; + 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 (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) { + + con_log(CL_ANN, (KERN_WARNING + "megaraid: pci_set_dma_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: maibox 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_register 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_nocache(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 (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { + con_log(CL_ANN, (KERN_WARNING + "megaraid: DMA mask for 64-bit failed\n")); + + if (pci_set_dma_mask (adapter->pdev, 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 maibox 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 = pci_zalloc_consistent(adapter->pdev, + sizeof(mbox64_t), + &raid_dev->una_mbox64_dma); + + 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 = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE, + &adapter->ibuf_dma_h); + 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 = PCI_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: + pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, + adapter->ibuf_dma_h); +out_free_common_mbox: + pci_free_consistent(adapter->pdev, 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); + + pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, + (void *)adapter->ibuf, adapter->ibuf_dma_h); + + pci_free_consistent(adapter->pdev, 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 + * allocted 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); + } + if (raid_dev->sg_pool_handle) + 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); + } + if (raid_dev->epthru_pool_handle) + 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); + } + if (raid_dev->mbox_pool_handle) + 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++; + + if (scb->dma_direction == PCI_DMA_TODEVICE) + pci_dma_sync_sg_for_device(adapter->pdev, + scsi_sglist(scb->scp), + scsi_sg_count(scb->scp), + PCI_DMA_TODEVICE); + + 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 - generic queue entry point for all LLDs + * @scp : pointer to the scsi command to be executed + * @done : callback routine to be called after the cmd has be completed + * + * Queue entry point for mailbox based controllers. + */ +static int +megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) +{ + adapter_t *adapter; + scb_t *scb; + int if_busy; + + adapter = SCP2ADAPTER(scp); + scp->scsi_done = done; + 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) { + scp->sense_buffer[0] = 0x70; + scp->sense_buffer[2] = ILLEGAL_REQUEST; + scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; + scp->result = CHECK_CONDITION << 1; + return NULL; + } + + /* Fall through */ + + 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: + case RELEASE: + /* + * 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) ? + 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_sync_scb - sync kernel buffers + * @adapter : controller's soft state + * @scb : pointer to the resource packet + * + * DMA sync if required. + */ +static void +megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) +{ + mbox_ccb_t *ccb; + + ccb = (mbox_ccb_t *)scb->ccb; + + if (scb->dma_direction == PCI_DMA_FROMDEVICE) + pci_dma_sync_sg_for_cpu(adapter->pdev, + scsi_sglist(scb->scp), + scsi_sg_count(scb->scp), + PCI_DMA_FROMDEVICE); + + scsi_dma_unmap(scb->scp); + return; +} + + +/** + * 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 = DRIVER_SENSE << 24 | + DID_OK << 16 | CHECK_CONDITION << 1; + } + else { + if (mbox->cmd == MBOXCMD_EXTPTHRU) { + + memcpy(scp->sense_buffer, + epthru->reqsensearea, 14); + + scp->result = DRIVER_SENSE << 24 | + DID_OK << 16 | + CHECK_CONDITION << 1; + } else { + scp->sense_buffer[0] = 0x70; + scp->sense_buffer[2] = ABORTED_COMMAND; + scp->result = CHECK_CONDITION << 1; + } + } + 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 | + RESERVATION_CONFLICT << 1; + } + else + /* + * Error code returned is 1 if Reserve or Release + * failed or the input parameter is invalid + */ + if (status == 1 && (scp->cmnd[0] == RESERVE || + scp->cmnd[0] == RELEASE)) { + + scp->result = DID_ERROR << 16 | + RESERVATION_CONFLICT << 1; + } + else { + scp->result = DID_BAD_TARGET << 16 | status; + } + } + + // print a debug message for all failed commands + if (status) { + megaraid_mbox_display_scb(adapter, scb); + } + + // Free our internal resources and call the mid-layer callback + // routine + megaraid_mbox_sync_scb(adapter, scb); + + // 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 + scp->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); + scp->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); + scp->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 recovering; + 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); + scb->scp->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; + + recovering = adapter->outstanding_cmds; + + 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); + mbox64_t *mbox64; + mbox_t *mbox; + uint8_t status; + int i; + + + mbox64 = raid_dev->mbox64; + 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 = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), + &pinfo_dma_h); + + 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")); + + pci_free_consistent(adapter->pdev, 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")); + + pci_free_consistent(adapter->pdev, 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)); + + pci_free_consistent(adapter->pdev, 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) +{ + mbox_t *mbox; + 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; + } + + mbox = (mbox_t *)raw_mbox; + + 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) +{ + mbox_t *mbox; + uint8_t raw_mbox[sizeof(mbox_t)]; + + + mbox = (mbox_t *)raw_mbox; + + 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); + mbox64_t *mbox64; + int status = 0; + int i; + uint32_t dword; + + mbox = (mbox_t *)raw_mbox; + + memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); + + raw_mbox[0] = 0xFF; + + mbox64 = raid_dev->mbox64; + 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 + * @level : debug level for console print + * + * 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 = PCI_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 = PCI_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) +{ + uint8_t dmajor; + + dmajor = megaraid_mbox_version[0]; + + 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 = pci_alloc_consistent(adapter->pdev, + PAGE_SIZE, &raid_dev->sysfs_buffer_dma); + + 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) { + pci_free_consistent(adapter->pdev, 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 = from_timer(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)); + } + + + del_timer_sync(&timeout.timer); + destroy_timer_on_stack(&timeout.timer); + + mutex_unlock(&raid_dev->sysfs_mtx); + + return rval; +} + + +/** + * megaraid_sysfs_show_app_hndl - display application handle for this adapter + * @cdev : class device object representation for the host + * @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_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, + char *buf) +{ + 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 snprintf(buf, 8, "%u\n", app_hndl); +} + + +/** + * megaraid_sysfs_show_ldnum - 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_sysfs_show_ldnum(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 snprintf(buf, 36, "%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); + +/* vim: set ts=8 sw=8 tw=78 ai si: */ |