| /* |
| * |
| * 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 : v2.20.4.9 (Jul 16 2006) |
| * |
| * Authors: |
| * Atul Mukker <Atul.Mukker@lsil.com> |
| * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> |
| * Manoj Jose <Manoj.Jose@lsil.com> |
| * Seokmann Ju <Seokmann.Ju@lsil.com> |
| * |
| * 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/ChangeLog.megaraid |
| */ |
| |
| #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 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_cmnd *, |
| void (*)(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 *, struct pt_regs *); |
| |
| static void megaraid_mbox_dpc(unsigned long); |
| |
| static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, 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("sju@lsil.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_g = { |
| .name = "megaraid", |
| .id_table = pci_id_table_g, |
| .probe = megaraid_probe_one, |
| .remove = __devexit_p(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) |
| |
| CLASS_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 class_device_attribute *megaraid_shost_attrs[] = { |
| &class_device_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_device_reset_handler = megaraid_reset_handler, |
| .eh_bus_reset_handler = megaraid_reset_handler, |
| .eh_host_reset_handler = megaraid_reset_handler, |
| .use_clustering = ENABLE_CLUSTERING, |
| .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 adaters |
| **/ |
| 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_g); |
| 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_g); |
| |
| return; |
| } |
| |
| |
| /** |
| * megaraid_probe_one - PCI hotplug entry point |
| * @param pdev : handle to this controller's PCI configuration space |
| * @param id : pci device id of the class of controllers |
| * |
| * This routine should be called whenever a new adapter is detected by the |
| * PCI hotplug susbsytem. |
| **/ |
| static int __devinit |
| 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 = kmalloc(sizeof(adapter_t), GFP_KERNEL); |
| |
| if (adapter == NULL) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__)); |
| |
| goto out_probe_one; |
| } |
| memset(adapter, 0, sizeof(adapter_t)); |
| |
| |
| // 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_32BIT_MASK) != 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: |
| pci_set_drvdata(pdev, NULL); |
| 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 the framework resources and call LLD release |
| * routine |
| * @param pdev : handle for our PCI cofiguration 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); |
| |
| // reset the device state in the PCI structure. We check this |
| // condition when we enter here. If the device state is NULL, |
| // that would mean the device has already been removed |
| pci_set_drvdata(pdev, NULL); |
| |
| // 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 |
| * @param device : generice 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 |
| * @param 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 |
| * @param 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 |
| * @param 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 __devinit |
| 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 = kmalloc(sizeof(mraid_device_t), GFP_KERNEL); |
| if (raid_dev == NULL) return -1; |
| |
| memset(raid_dev, 0, sizeof(mraid_device_t)); |
| |
| /* |
| * 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; |
| } |
| |
| // |
| // 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_iounmap; |
| } |
| |
| |
| // 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_free_irq; |
| } |
| |
| // Product info |
| if (megaraid_mbox_product_info(adapter) != 0) { |
| goto out_alloc_cmds; |
| } |
| |
| // 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_alloc_cmds; |
| } |
| |
| // 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_64BIT_MASK)) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid: DMA mask for 64-bit failed\n")); |
| |
| if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) { |
| 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_alloc_cmds: |
| megaraid_free_cmd_packets(adapter); |
| out_free_irq: |
| free_irq(adapter->irq, 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 |
| * @param 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 |
| * @param 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 regsitered |
| * 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_alloc_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", __FUNCTION__, |
| __LINE__)); |
| return -1; |
| } |
| memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); |
| |
| /* |
| * 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_alloc_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", __FUNCTION__, |
| __LINE__)); |
| |
| goto out_free_common_mbox; |
| } |
| memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); |
| |
| // 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 = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS, |
| GFP_KERNEL); |
| |
| if (adapter->kscb_list == NULL) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid: out of memory, %s %d\n", __FUNCTION__, |
| __LINE__)); |
| goto out_free_ibuf; |
| } |
| memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS); |
| |
| // 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", __FUNCTION__, |
| __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 |
| * @param 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 |
| * @param 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 = pci_pool_create("megaraid mbox pool", |
| adapter->pdev, |
| 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 = pci_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 = pci_pool_create("megaraid mbox pthru", |
| adapter->pdev, 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 = pci_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 = pci_pool_create("megaraid mbox sg", |
| adapter->pdev, |
| 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 = pci_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 |
| * @param 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++) { |
| pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, |
| sg_pci_blk[i].dma_addr); |
| } |
| if (raid_dev->sg_pool_handle) |
| pci_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++) { |
| pci_pool_free(raid_dev->epthru_pool_handle, |
| epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); |
| } |
| if (raid_dev->epthru_pool_handle) |
| pci_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++) { |
| pci_pool_free(raid_dev->mbox_pool_handle, |
| mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); |
| } |
| if (raid_dev->mbox_pool_handle) |
| pci_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 |
| * |
| * 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 page *page; |
| unsigned long offset; |
| struct scsi_cmnd *scp; |
| int sgcnt; |
| int i; |
| |
| |
| scp = scb->scp; |
| ccb = (mbox_ccb_t *)scb->ccb; |
| |
| // no mapping required if no data to be transferred |
| if (!scp->request_buffer || !scp->request_bufflen) |
| return 0; |
| |
| if (!scp->use_sg) { /* scatter-gather list not used */ |
| |
| page = virt_to_page(scp->request_buffer); |
| |
| offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK); |
| |
| ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset, |
| scp->request_bufflen, |
| scb->dma_direction); |
| scb->dma_type = MRAID_DMA_WBUF; |
| |
| /* |
| * We need to handle special 64-bit commands that need a |
| * minimum of 1 SG |
| */ |
| sgcnt = 1; |
| ccb->sgl64[0].address = ccb->buf_dma_h; |
| ccb->sgl64[0].length = scp->request_bufflen; |
| |
| return sgcnt; |
| } |
| |
| sgl = (struct scatterlist *)scp->request_buffer; |
| |
| // The number of sg elements returned must not exceed our limit |
| sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg, |
| scb->dma_direction); |
| |
| if (sgcnt > adapter->sglen) { |
| con_log(CL_ANN, (KERN_CRIT |
| "megaraid critical: too many sg elements:%d\n", |
| sgcnt)); |
| BUG(); |
| } |
| |
| scb->dma_type = MRAID_DMA_WSG; |
| |
| for (i = 0; i < sgcnt; i++, sgl++) { |
| 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 availble. |
| */ |
| 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) { |
| if (!scb->scp->use_sg) { // sg list not used |
| pci_dma_sync_single_for_device(adapter->pdev, |
| ccb->buf_dma_h, |
| scb->scp->request_bufflen, |
| PCI_DMA_TODEVICE); |
| } |
| else { |
| pci_dma_sync_sg_for_device(adapter->pdev, |
| scb->scp->request_buffer, |
| scb->scp->use_sg, 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(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; |
| } |
| |
| /** |
| * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid |
| * firmware lingua |
| * @adapter - controller's soft state |
| * @scp - mid-layer scsi command pointer |
| * @busy - set if request could not be completed because of lack of |
| * resources |
| * |
| * convert the command issued by mid-layer to format understood by megaraid |
| * firmware. We also complete certain command 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: |
| if (scp->use_sg) { |
| struct scatterlist *sgl; |
| caddr_t vaddr; |
| |
| sgl = (struct scatterlist *)scp->request_buffer; |
| if (sgl->page) { |
| vaddr = (caddr_t) |
| (page_address((&sgl[0])->page) |
| + (&sgl[0])->offset); |
| |
| memset(vaddr, 0, scp->cmnd[4]); |
| } |
| else { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid mailbox: invalid sg:%d\n", |
| __LINE__)); |
| } |
| } |
| else { |
| memset(scp->request_buffer, 0, scp->cmnd[4]); |
| } |
| 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)); |
| } |
| |
| /* 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 = scp->request_bufflen; |
| 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 : 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 (scp->request_bufflen) { |
| pthru->dataxferlen = scp->request_bufflen; |
| 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 rountine 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 (scp->request_bufflen) { |
| epthru->dataxferlen = scp->request_bufflen; |
| 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 ackrowledgement 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 |
| * @regs - unused |
| * |
| * Interrupt service routine for memory-mapped mailbox controllers. |
| */ |
| static irqreturn_t |
| megaraid_isr(int irq, void *devp, struct pt_regs *regs) |
| { |
| 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; |
| |
| switch (scb->dma_type) { |
| |
| case MRAID_DMA_WBUF: |
| if (scb->dma_direction == PCI_DMA_FROMDEVICE) { |
| pci_dma_sync_single_for_cpu(adapter->pdev, |
| ccb->buf_dma_h, |
| scb->scp->request_bufflen, |
| PCI_DMA_FROMDEVICE); |
| } |
| |
| pci_unmap_page(adapter->pdev, ccb->buf_dma_h, |
| scb->scp->request_bufflen, scb->dma_direction); |
| |
| break; |
| |
| case MRAID_DMA_WSG: |
| if (scb->dma_direction == PCI_DMA_FROMDEVICE) { |
| pci_dma_sync_sg_for_cpu(adapter->pdev, |
| scb->scp->request_buffer, |
| scb->scp->use_sg, PCI_DMA_FROMDEVICE); |
| } |
| |
| pci_unmap_sg(adapter->pdev, scb->scp->request_buffer, |
| scb->scp->use_sg, scb->dma_direction); |
| |
| break; |
| |
| default: |
| break; |
| } |
| |
| 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 %lx[%x] completed\n", |
| scp->serial_number, 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)) { |
| |
| if (scp->use_sg) { |
| sgl = (struct scatterlist *) |
| scp->request_buffer; |
| |
| if (sgl->page) { |
| c = *(unsigned char *) |
| (page_address((&sgl[0])->page) + |
| (&sgl[0])->offset); |
| } |
| else { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid mailbox: invalid sg:%d\n", |
| __LINE__)); |
| c = 0; |
| } |
| } |
| else { |
| c = *(uint8_t *)scp->request_buffer; |
| } |
| |
| 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-%ld cmd=%x <c=%d t=%d l=%d>\n", |
| scp->serial_number, 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: %ld:%d[%d:%d], abort from completed list\n", |
| scp->serial_number, 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: %ld[%d:%d], driver owner\n", |
| scp->serial_number, 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: %ld%d[%d:%d], invalid state\n", |
| scp->serial_number, scb->sno, scb->dev_channel, |
| scb->dev_target)); |
| BUG(); |
| } |
| else { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid abort: %ld:%d[%d:%d], fw owner\n", |
| scp->serial_number, scb->sno, scb->dev_channel, |
| scb->dev_target)); |
| } |
| } |
| } |
| spin_unlock_irq(&adapter->lock); |
| |
| if (!found) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid abort: scsi cmd:%ld, do now own\n", |
| scp->serial_number)); |
| |
| // 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 hadler 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: %ld:%d[%d:%d], reset from pending list\n", |
| scp->serial_number, 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 happended 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 sucessfully\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_irq(&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_alloc_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", __FUNCTION__, |
| __LINE__)); |
| |
| return -1; |
| } |
| memset(pinfo, 0, sizeof(mraid_pinfo_t)); |
| |
| 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; |
| |
| |
| 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 platoforms 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 |
| * @param 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_display_scb - display SCB information, mostly debug purposes |
| * @param adapter : controllers' soft state |
| * @param scb : SCB to be displayed |
| * @param 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 |
| * |
| * Manange the device ids to have an appropraite 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 mangement module to |
| * provide support for ioctl and sysfs |
| */ |
| |
| /** |
| * megaraid_cmm_register - register with the mangement module |
| * @param 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 = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS, |
| GFP_KERNEL); |
| |
| if (adapter->uscb_list == NULL) { |
| con_log(CL_ANN, (KERN_WARNING |
| "megaraid: out of memory, %s %d\n", __FUNCTION__, |
| __LINE__)); |
| return -1; |
| } |
| memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS); |
| |
| |
| // 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 mangement module |
| * @param 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 |
| * @param drvr_data : LLD specific data |
| * @param kioc : CMM interface packet |
| * @param action : command action |
| * |
| * This routine is invoked whenever the Common Mangement 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 |
| * @param adapter : HBA soft state |
| * @param 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 |
| * @param adapter : HBA soft state |
| * @param 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 |
| * |
| * 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. |
| * |
| * @param adapter : controller's soft state |
| * |
| * @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", __FUNCTION__, |
| __LINE__)); |
| |
| rval = -ENOMEM; |
| |
| megaraid_sysfs_free_resources(adapter); |
| } |
| |
| sema_init(&raid_dev->sysfs_sem, 1); |
| |
| init_waitqueue_head(&raid_dev->sysfs_wait_q); |
| |
| return rval; |
| } |
| |
| |
| /** |
| * megaraid_sysfs_free_resources - free sysfs related resources |
| * |
| * Free packets allocated for sysfs FW commands |
| * |
| * @param adapter : controller's soft state |
| */ |
| 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 |
| * |
| * Callback routine called in the ISR/tasklet context for get ldmap call |
| * |
| * @param uioc : completed packet |
| */ |
| 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 |
| * |
| * Timeout routine to recover and return to application, in case the adapter |
| * has stopped responding. A timeout of 60 seconds for this command seem like |
| * a good value |
| * |
| * @param uioc : timed out packet |
| */ |
| static void |
| megaraid_sysfs_get_ldmap_timeout(unsigned long data) |
| { |
| uioc_t *uioc = (uioc_t *)data; |
| 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 |
| * |
| * 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 managment 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 libary. For now, this should suffice since there is no other |
| * user of this interface. |
| * |
| * @param adapter : controller's soft state |
| * |
| * @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 timer_list sysfs_timer; |
| struct timer_list *timerp; |
| caddr_t ldmap; |
| int rval = 0; |
| |
| /* |
| * Allow only one read at a time to go through the sysfs attributes |
| */ |
| down(&raid_dev->sysfs_sem); |
| |
| 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 |
| */ |
| timerp = &sysfs_timer; |
| init_timer(timerp); |
| |
| timerp->function = megaraid_sysfs_get_ldmap_timeout; |
| timerp->data = (unsigned long)uioc; |
| timerp->expires = jiffies + 60 * HZ; |
| |
| add_timer(timerp); |
| |
| /* |
| * 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(timerp); |
| |
| up(&raid_dev->sysfs_sem); |
| |
| return rval; |
| } |
| |
| |
| /** |
| * megaraid_sysfs_show_app_hndl - display application handle for this adapter |
| * |
| * 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. |
| * |
| * @param cdev : class device object representation for the host |
| * @param buf : buffer to send data to |
| */ |
| static ssize_t |
| megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(cdev); |
| 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 |
| * |
| * 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> |
| * |
| * @param dev : device object representation for the scsi device |
| * @param buf : buffer to send data to |
| */ |
| 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: */ |