--- /dev/null
+/*
+ *
+ * Linux MegaRAID device driver
+ *
+ * Copyright (c) 2003-2004 LSI Logic Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * FILE : megaraid_mbox.c
+ * Version : v2.20.5.1 (Nov 16 2006)
+ *
+ * Authors:
+ * Atul Mukker <Atul.Mukker@lsi.com>
+ * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com>
+ * Manoj Jose <Manoj.Jose@lsi.com>
+ * Seokmann Ju
+ *
+ * List of supported controllers
+ *
+ * OEM Product Name VID DID SSVID SSID
+ * --- ------------ --- --- ---- ----
+ * Dell PERC3/QC 101E 1960 1028 0471
+ * Dell PERC3/DC 101E 1960 1028 0493
+ * Dell PERC3/SC 101E 1960 1028 0475
+ * Dell PERC3/Di 1028 1960 1028 0123
+ * Dell PERC4/SC 1000 1960 1028 0520
+ * Dell PERC4/DC 1000 1960 1028 0518
+ * Dell PERC4/QC 1000 0407 1028 0531
+ * Dell PERC4/Di 1028 000F 1028 014A
+ * Dell PERC 4e/Si 1028 0013 1028 016c
+ * Dell PERC 4e/Di 1028 0013 1028 016d
+ * Dell PERC 4e/Di 1028 0013 1028 016e
+ * Dell PERC 4e/Di 1028 0013 1028 016f
+ * Dell PERC 4e/Di 1028 0013 1028 0170
+ * Dell PERC 4e/DC 1000 0408 1028 0002
+ * Dell PERC 4e/SC 1000 0408 1028 0001
+ *
+ *
+ * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520
+ * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520
+ * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518
+ * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530
+ * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532
+ * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531
+ * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001
+ * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002
+ * LSI MegaRAID SATA 150-4 1000 1960 1000 4523
+ * LSI MegaRAID SATA 150-6 1000 1960 1000 0523
+ * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004
+ * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008
+ *
+ * INTEL RAID Controller SRCU42X 1000 0407 8086 0532
+ * INTEL RAID Controller SRCS16 1000 1960 8086 0523
+ * INTEL RAID Controller SRCU42E 1000 0408 8086 0002
+ * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530
+ * INTEL RAID Controller SRCS28X 1000 0409 8086 3008
+ * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431
+ * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499
+ * INTEL RAID Controller SRCU51L 1000 1960 8086 0520
+ *
+ * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065
+ *
+ * ACER MegaRAID ROMB-2E 1000 0408 1025 004D
+ *
+ * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287
+ *
+ * For history of changes, see Documentation/scsi/ChangeLog.megaraid
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include "megaraid_mbox.h"
+
+static int megaraid_init(void);
+static void megaraid_exit(void);
+
+static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
+static void megaraid_detach_one(struct pci_dev *);
+static void megaraid_mbox_shutdown(struct pci_dev *);
+
+static int megaraid_io_attach(adapter_t *);
+static void megaraid_io_detach(adapter_t *);
+
+static int megaraid_init_mbox(adapter_t *);
+static void megaraid_fini_mbox(adapter_t *);
+
+static int megaraid_alloc_cmd_packets(adapter_t *);
+static void megaraid_free_cmd_packets(adapter_t *);
+
+static int megaraid_mbox_setup_dma_pools(adapter_t *);
+static void megaraid_mbox_teardown_dma_pools(adapter_t *);
+
+static int megaraid_sysfs_alloc_resources(adapter_t *);
+static void megaraid_sysfs_free_resources(adapter_t *);
+
+static int megaraid_abort_handler(struct scsi_cmnd *);
+static int megaraid_reset_handler(struct scsi_cmnd *);
+
+static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
+static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
+static int megaraid_busywait_mbox(mraid_device_t *);
+static int megaraid_mbox_product_info(adapter_t *);
+static int megaraid_mbox_extended_cdb(adapter_t *);
+static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
+static int megaraid_mbox_support_random_del(adapter_t *);
+static int megaraid_mbox_get_max_sg(adapter_t *);
+static void megaraid_mbox_enum_raid_scsi(adapter_t *);
+static void megaraid_mbox_flush_cache(adapter_t *);
+static int megaraid_mbox_fire_sync_cmd(adapter_t *);
+
+static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
+static void megaraid_mbox_setup_device_map(adapter_t *);
+
+static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
+static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
+static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
+static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
+ struct scsi_cmnd *);
+static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
+ struct scsi_cmnd *);
+
+static irqreturn_t megaraid_isr(int, void *);
+
+static void megaraid_mbox_dpc(unsigned long);
+
+static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
+static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
+
+static int megaraid_cmm_register(adapter_t *);
+static int megaraid_cmm_unregister(adapter_t *);
+static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
+static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
+static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
+static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
+static int wait_till_fw_empty(adapter_t *);
+
+
+
+MODULE_AUTHOR("megaraidlinux@lsi.com");
+MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MEGARAID_VERSION);
+
+/*
+ * ### modules parameters for driver ###
+ */
+
+/*
+ * Set to enable driver to expose unconfigured disk to kernel
+ */
+static int megaraid_expose_unconf_disks = 0;
+module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
+MODULE_PARM_DESC(unconf_disks,
+ "Set to expose unconfigured disks to kernel (default=0)");
+
+/*
+ * driver wait time if the adapter's mailbox is busy
+ */
+static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
+module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
+MODULE_PARM_DESC(busy_wait,
+ "Max wait for mailbox in microseconds if busy (default=10)");
+
+/*
+ * number of sectors per IO command
+ */
+static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
+module_param_named(max_sectors, megaraid_max_sectors, int, 0);
+MODULE_PARM_DESC(max_sectors,
+ "Maximum number of sectors per IO command (default=128)");
+
+/*
+ * number of commands per logical unit
+ */
+static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
+module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
+MODULE_PARM_DESC(cmd_per_lun,
+ "Maximum number of commands per logical unit (default=64)");
+
+
+/*
+ * Fast driver load option, skip scanning for physical devices during load.
+ * This would result in non-disk devices being skipped during driver load
+ * time. These can be later added though, using /proc/scsi/scsi
+ */
+static unsigned int megaraid_fast_load = 0;
+module_param_named(fast_load, megaraid_fast_load, int, 0);
+MODULE_PARM_DESC(fast_load,
+ "Faster loading of the driver, skips physical devices! (default=0)");
+
+
+/*
+ * mraid_debug level - threshold for amount of information to be displayed by
+ * the driver. This level can be changed through modules parameters, ioctl or
+ * sysfs/proc interface. By default, print the announcement messages only.
+ */
+int mraid_debug_level = CL_ANN;
+module_param_named(debug_level, mraid_debug_level, int, 0);
+MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
+
+/*
+ * ### global data ###
+ */
+static uint8_t megaraid_mbox_version[8] =
+ { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
+
+
+/*
+ * PCI table for all supported controllers.
+ */
+static struct pci_device_id pci_id_table_g[] = {
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_PERC4_SC,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4_SC,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_PERC4_DC,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4_DC,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_VERDE,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4E_DI_KOBUK,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_DOBSON,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_AMI,
+ PCI_DEVICE_ID_AMI_MEGARAID3,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_AMI_MEGARAID3,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_LINDSAY,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {0} /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(pci, pci_id_table_g);
+
+
+static struct pci_driver megaraid_pci_driver = {
+ .name = "megaraid",
+ .id_table = pci_id_table_g,
+ .probe = megaraid_probe_one,
+ .remove = megaraid_detach_one,
+ .shutdown = megaraid_mbox_shutdown,
+};
+
+
+
+// definitions for the device attributes for exporting logical drive number
+// for a scsi address (Host, Channel, Id, Lun)
+
+DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
+ NULL);
+
+// Host template initializer for megaraid mbox sysfs device attributes
+static struct device_attribute *megaraid_shost_attrs[] = {
+ &dev_attr_megaraid_mbox_app_hndl,
+ NULL,
+};
+
+
+DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
+
+// Host template initializer for megaraid mbox sysfs device attributes
+static struct device_attribute *megaraid_sdev_attrs[] = {
+ &dev_attr_megaraid_mbox_ld,
+ NULL,
+};
+
+/*
+ * Scsi host template for megaraid unified driver
+ */
+static struct scsi_host_template megaraid_template_g = {
+ .module = THIS_MODULE,
+ .name = "LSI Logic MegaRAID driver",
+ .proc_name = "megaraid",
+ .queuecommand = megaraid_queue_command,
+ .eh_abort_handler = megaraid_abort_handler,
+ .eh_device_reset_handler = megaraid_reset_handler,
+ .eh_bus_reset_handler = megaraid_reset_handler,
+ .eh_host_reset_handler = megaraid_reset_handler,
+ .change_queue_depth = scsi_change_queue_depth,
+ .use_clustering = ENABLE_CLUSTERING,
+ .no_write_same = 1,
+ .sdev_attrs = megaraid_sdev_attrs,
+ .shost_attrs = megaraid_shost_attrs,
+};
+
+
+/**
+ * megaraid_init - module load hook
+ *
+ * We register ourselves as hotplug enabled module and let PCI subsystem
+ * discover our adapters.
+ */
+static int __init
+megaraid_init(void)
+{
+ int rval;
+
+ // Announce the driver version
+ con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
+ MEGARAID_EXT_VERSION));
+
+ // check validity of module parameters
+ if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mailbox: max commands per lun reset to %d\n",
+ MBOX_MAX_SCSI_CMDS));
+
+ megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
+ }
+
+
+ // register as a PCI hot-plug driver module
+ rval = pci_register_driver(&megaraid_pci_driver);
+ if (rval < 0) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: could not register hotplug support.\n"));
+ }
+
+ return rval;
+}
+
+
+/**
+ * megaraid_exit - driver unload entry point
+ *
+ * We simply unwrap the megaraid_init routine here.
+ */
+static void __exit
+megaraid_exit(void)
+{
+ con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
+
+ // unregister as PCI hotplug driver
+ pci_unregister_driver(&megaraid_pci_driver);
+
+ return;
+}
+
+
+/**
+ * megaraid_probe_one - PCI hotplug entry point
+ * @pdev : handle to this controller's PCI configuration space
+ * @id : pci device id of the class of controllers
+ *
+ * This routine should be called whenever a new adapter is detected by the
+ * PCI hotplug susbsystem.
+ */
+static int
+megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ adapter_t *adapter;
+
+
+ // detected a new controller
+ con_log(CL_ANN, (KERN_INFO
+ "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
+ pdev->vendor, pdev->device, pdev->subsystem_vendor,
+ pdev->subsystem_device));
+
+ con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
+
+ if (pci_enable_device(pdev)) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: pci_enable_device failed\n"));
+
+ return -ENODEV;
+ }
+
+ // Enable bus-mastering on this controller
+ pci_set_master(pdev);
+
+ // Allocate the per driver initialization structure
+ adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
+
+ if (adapter == NULL) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
+
+ goto out_probe_one;
+ }
+
+
+ // set up PCI related soft state and other pre-known parameters
+ adapter->unique_id = pdev->bus->number << 8 | pdev->devfn;
+ adapter->irq = pdev->irq;
+ adapter->pdev = pdev;
+
+ atomic_set(&adapter->being_detached, 0);
+
+ // Setup the default DMA mask. This would be changed later on
+ // depending on hardware capabilities
+ if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
+
+ goto out_free_adapter;
+ }
+
+
+ // Initialize the synchronization lock for kernel and LLD
+ spin_lock_init(&adapter->lock);
+
+ // Initialize the command queues: the list of free SCBs and the list
+ // of pending SCBs.
+ INIT_LIST_HEAD(&adapter->kscb_pool);
+ spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
+
+ INIT_LIST_HEAD(&adapter->pend_list);
+ spin_lock_init(PENDING_LIST_LOCK(adapter));
+
+ INIT_LIST_HEAD(&adapter->completed_list);
+ spin_lock_init(COMPLETED_LIST_LOCK(adapter));
+
+
+ // Start the mailbox based controller
+ if (megaraid_init_mbox(adapter) != 0) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: maibox adapter did not initialize\n"));
+
+ goto out_free_adapter;
+ }
+
+ // Register with LSI Common Management Module
+ if (megaraid_cmm_register(adapter) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: could not register with management module\n"));
+
+ goto out_fini_mbox;
+ }
+
+ // setup adapter handle in PCI soft state
+ pci_set_drvdata(pdev, adapter);
+
+ // attach with scsi mid-layer
+ if (megaraid_io_attach(adapter) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
+
+ goto out_cmm_unreg;
+ }
+
+ return 0;
+
+out_cmm_unreg:
+ megaraid_cmm_unregister(adapter);
+out_fini_mbox:
+ megaraid_fini_mbox(adapter);
+out_free_adapter:
+ kfree(adapter);
+out_probe_one:
+ pci_disable_device(pdev);
+
+ return -ENODEV;
+}
+
+
+/**
+ * megaraid_detach_one - release framework resources and call LLD release routine
+ * @pdev : handle for our PCI configuration space
+ *
+ * This routine is called during driver unload. We free all the allocated
+ * resources and call the corresponding LLD so that it can also release all
+ * its resources.
+ *
+ * This routine is also called from the PCI hotplug system.
+ */
+static void
+megaraid_detach_one(struct pci_dev *pdev)
+{
+ adapter_t *adapter;
+ struct Scsi_Host *host;
+
+
+ // Start a rollback on this adapter
+ adapter = pci_get_drvdata(pdev);
+
+ if (!adapter) {
+ con_log(CL_ANN, (KERN_CRIT
+ "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
+ pdev->vendor, pdev->device, pdev->subsystem_vendor,
+ pdev->subsystem_device));
+
+ return;
+ }
+ else {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
+ pdev->vendor, pdev->device, pdev->subsystem_vendor,
+ pdev->subsystem_device));
+ }
+
+
+ host = adapter->host;
+
+ // do not allow any more requests from the management module for this
+ // adapter.
+ // FIXME: How do we account for the request which might still be
+ // pending with us?
+ atomic_set(&adapter->being_detached, 1);
+
+ // detach from the IO sub-system
+ megaraid_io_detach(adapter);
+
+ // Unregister from common management module
+ //
+ // FIXME: this must return success or failure for conditions if there
+ // is a command pending with LLD or not.
+ megaraid_cmm_unregister(adapter);
+
+ // finalize the mailbox based controller and release all resources
+ megaraid_fini_mbox(adapter);
+
+ kfree(adapter);
+
+ scsi_host_put(host);
+
+ pci_disable_device(pdev);
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
+ * @pdev : generic driver model device
+ *
+ * Shutdown notification, perform flush cache.
+ */
+static void
+megaraid_mbox_shutdown(struct pci_dev *pdev)
+{
+ adapter_t *adapter = pci_get_drvdata(pdev);
+ static int counter;
+
+ if (!adapter) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: null device in shutdown\n"));
+ return;
+ }
+
+ // flush caches now
+ con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
+ counter++));
+
+ megaraid_mbox_flush_cache(adapter);
+
+ con_log(CL_ANN, ("done\n"));
+}
+
+
+/**
+ * megaraid_io_attach - attach a device with the IO subsystem
+ * @adapter : controller's soft state
+ *
+ * Attach this device with the IO subsystem.
+ */
+static int
+megaraid_io_attach(adapter_t *adapter)
+{
+ struct Scsi_Host *host;
+
+ // Initialize SCSI Host structure
+ host = scsi_host_alloc(&megaraid_template_g, 8);
+ if (!host) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mbox: scsi_register failed\n"));
+
+ return -1;
+ }
+
+ SCSIHOST2ADAP(host) = (caddr_t)adapter;
+ adapter->host = host;
+
+ host->irq = adapter->irq;
+ host->unique_id = adapter->unique_id;
+ host->can_queue = adapter->max_cmds;
+ host->this_id = adapter->init_id;
+ host->sg_tablesize = adapter->sglen;
+ host->max_sectors = adapter->max_sectors;
+ host->cmd_per_lun = adapter->cmd_per_lun;
+ host->max_channel = adapter->max_channel;
+ host->max_id = adapter->max_target;
+ host->max_lun = adapter->max_lun;
+
+
+ // notify mid-layer about the new controller
+ if (scsi_add_host(host, &adapter->pdev->dev)) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mbox: scsi_add_host failed\n"));
+
+ scsi_host_put(host);
+
+ return -1;
+ }
+
+ scsi_scan_host(host);
+
+ return 0;
+}
+
+
+/**
+ * megaraid_io_detach - detach a device from the IO subsystem
+ * @adapter : controller's soft state
+ *
+ * Detach this device from the IO subsystem.
+ */
+static void
+megaraid_io_detach(adapter_t *adapter)
+{
+ struct Scsi_Host *host;
+
+ con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
+
+ host = adapter->host;
+
+ scsi_remove_host(host);
+
+ return;
+}
+
+
+/*
+ * START: Mailbox Low Level Driver
+ *
+ * This is section specific to the single mailbox based controllers
+ */
+
+/**
+ * megaraid_init_mbox - initialize controller
+ * @adapter : our soft state
+ *
+ * - Allocate 16-byte aligned mailbox memory for firmware handshake
+ * - Allocate controller's memory resources
+ * - Find out all initialization data
+ * - Allocate memory required for all the commands
+ * - Use internal library of FW routines, build up complete soft state
+ */
+static int
+megaraid_init_mbox(adapter_t *adapter)
+{
+ struct pci_dev *pdev;
+ mraid_device_t *raid_dev;
+ int i;
+ uint32_t magic64;
+
+
+ adapter->ito = MBOX_TIMEOUT;
+ pdev = adapter->pdev;
+
+ /*
+ * Allocate and initialize the init data structure for mailbox
+ * controllers
+ */
+ raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
+ if (raid_dev == NULL) return -1;
+
+
+ /*
+ * Attach the adapter soft state to raid device soft state
+ */
+ adapter->raid_device = (caddr_t)raid_dev;
+ raid_dev->fast_load = megaraid_fast_load;
+
+
+ // our baseport
+ raid_dev->baseport = pci_resource_start(pdev, 0);
+
+ if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: mem region busy\n"));
+
+ goto out_free_raid_dev;
+ }
+
+ raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
+
+ if (!raid_dev->baseaddr) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: could not map hba memory\n") );
+
+ goto out_release_regions;
+ }
+
+ /* initialize the mutual exclusion lock for the mailbox */
+ spin_lock_init(&raid_dev->mailbox_lock);
+
+ /* allocate memory required for commands */
+ if (megaraid_alloc_cmd_packets(adapter) != 0)
+ goto out_iounmap;
+
+ /*
+ * Issue SYNC cmd to flush the pending cmds in the adapter
+ * and initialize its internal state
+ */
+
+ if (megaraid_mbox_fire_sync_cmd(adapter))
+ con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
+
+ /*
+ * Setup the rest of the soft state using the library of
+ * FW routines
+ */
+
+ /* request IRQ and register the interrupt service routine */
+ if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
+ adapter)) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
+ goto out_alloc_cmds;
+
+ }
+
+ // Product info
+ if (megaraid_mbox_product_info(adapter) != 0)
+ goto out_free_irq;
+
+ // Do we support extended CDBs
+ adapter->max_cdb_sz = 10;
+ if (megaraid_mbox_extended_cdb(adapter) == 0) {
+ adapter->max_cdb_sz = 16;
+ }
+
+ /*
+ * Do we support cluster environment, if we do, what is the initiator
+ * id.
+ * NOTE: In a non-cluster aware firmware environment, the LLD should
+ * return 7 as initiator id.
+ */
+ adapter->ha = 0;
+ adapter->init_id = -1;
+ if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
+ adapter->ha = 1;
+ }
+
+ /*
+ * Prepare the device ids array to have the mapping between the kernel
+ * device address and megaraid device address.
+ * We export the physical devices on their actual addresses. The
+ * logical drives are exported on a virtual SCSI channel
+ */
+ megaraid_mbox_setup_device_map(adapter);
+
+ // If the firmware supports random deletion, update the device id map
+ if (megaraid_mbox_support_random_del(adapter)) {
+
+ // Change the logical drives numbers in device_ids array one
+ // slot in device_ids is reserved for target id, that's why
+ // "<=" below
+ for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
+ adapter->device_ids[adapter->max_channel][i] += 0x80;
+ }
+ adapter->device_ids[adapter->max_channel][adapter->init_id] =
+ 0xFF;
+
+ raid_dev->random_del_supported = 1;
+ }
+
+ /*
+ * find out the maximum number of scatter-gather elements supported by
+ * this firmware
+ */
+ adapter->sglen = megaraid_mbox_get_max_sg(adapter);
+
+ // enumerate RAID and SCSI channels so that all devices on SCSI
+ // channels can later be exported, including disk devices
+ megaraid_mbox_enum_raid_scsi(adapter);
+
+ /*
+ * Other parameters required by upper layer
+ *
+ * maximum number of sectors per IO command
+ */
+ adapter->max_sectors = megaraid_max_sectors;
+
+ /*
+ * number of queued commands per LUN.
+ */
+ adapter->cmd_per_lun = megaraid_cmd_per_lun;
+
+ /*
+ * Allocate resources required to issue FW calls, when sysfs is
+ * accessed
+ */
+ if (megaraid_sysfs_alloc_resources(adapter) != 0)
+ goto out_free_irq;
+
+ // Set the DMA mask to 64-bit. All supported controllers as capable of
+ // DMA in this range
+ pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
+
+ if (((magic64 == HBA_SIGNATURE_64_BIT) &&
+ ((adapter->pdev->subsystem_device !=
+ PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
+ (adapter->pdev->subsystem_device !=
+ PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
+ (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
+ adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
+ (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
+ adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
+ (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
+ adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
+ (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
+ adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
+ (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
+ adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
+ if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: DMA mask for 64-bit failed\n"));
+
+ if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: 32-bit DMA mask failed\n"));
+ goto out_free_sysfs_res;
+ }
+ }
+ }
+
+ // setup tasklet for DPC
+ tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
+ (unsigned long)adapter);
+
+ con_log(CL_DLEVEL1, (KERN_INFO
+ "megaraid mbox hba successfully initialized\n"));
+
+ return 0;
+
+out_free_sysfs_res:
+ megaraid_sysfs_free_resources(adapter);
+out_free_irq:
+ free_irq(adapter->irq, adapter);
+out_alloc_cmds:
+ megaraid_free_cmd_packets(adapter);
+out_iounmap:
+ iounmap(raid_dev->baseaddr);
+out_release_regions:
+ pci_release_regions(pdev);
+out_free_raid_dev:
+ kfree(raid_dev);
+
+ return -1;
+}
+
+
+/**
+ * megaraid_fini_mbox - undo controller initialization
+ * @adapter : our soft state
+ */
+static void
+megaraid_fini_mbox(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+
+ // flush all caches
+ megaraid_mbox_flush_cache(adapter);
+
+ tasklet_kill(&adapter->dpc_h);
+
+ megaraid_sysfs_free_resources(adapter);
+
+ megaraid_free_cmd_packets(adapter);
+
+ free_irq(adapter->irq, adapter);
+
+ iounmap(raid_dev->baseaddr);
+
+ pci_release_regions(adapter->pdev);
+
+ kfree(raid_dev);
+
+ return;
+}
+
+
+/**
+ * megaraid_alloc_cmd_packets - allocate shared mailbox
+ * @adapter : soft state of the raid controller
+ *
+ * Allocate and align the shared mailbox. This maibox is used to issue
+ * all the commands. For IO based controllers, the mailbox is also registered
+ * with the FW. Allocate memory for all commands as well.
+ * This is our big allocator.
+ */
+static int
+megaraid_alloc_cmd_packets(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ struct pci_dev *pdev;
+ unsigned long align;
+ scb_t *scb;
+ mbox_ccb_t *ccb;
+ struct mraid_pci_blk *epthru_pci_blk;
+ struct mraid_pci_blk *sg_pci_blk;
+ struct mraid_pci_blk *mbox_pci_blk;
+ int i;
+
+ pdev = adapter->pdev;
+
+ /*
+ * Setup the mailbox
+ * Allocate the common 16-byte aligned memory for the handshake
+ * mailbox.
+ */
+ raid_dev->una_mbox64 = pci_zalloc_consistent(adapter->pdev,
+ sizeof(mbox64_t),
+ &raid_dev->una_mbox64_dma);
+
+ if (!raid_dev->una_mbox64) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+ return -1;
+ }
+
+ /*
+ * Align the mailbox at 16-byte boundary
+ */
+ raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
+
+ raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
+ (~0UL ^ 0xFUL));
+
+ raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
+
+ align = ((void *)raid_dev->mbox -
+ ((void *)&raid_dev->una_mbox64->mbox32));
+
+ raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
+ align;
+
+ // Allocate memory for commands issued internally
+ adapter->ibuf = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE,
+ &adapter->ibuf_dma_h);
+ if (!adapter->ibuf) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+
+ goto out_free_common_mbox;
+ }
+
+ // Allocate memory for our SCSI Command Blocks and their associated
+ // memory
+
+ /*
+ * Allocate memory for the base list of scb. Later allocate memory for
+ * CCBs and embedded components of each CCB and point the pointers in
+ * scb to the allocated components
+ * NOTE: The code to allocate SCB will be duplicated in all the LLD
+ * since the calling routine does not yet know the number of available
+ * commands.
+ */
+ adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
+
+ if (adapter->kscb_list == NULL) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+ goto out_free_ibuf;
+ }
+
+ // memory allocation for our command packets
+ if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+ goto out_free_scb_list;
+ }
+
+ // Adjust the scb pointers and link in the free pool
+ epthru_pci_blk = raid_dev->epthru_pool;
+ sg_pci_blk = raid_dev->sg_pool;
+ mbox_pci_blk = raid_dev->mbox_pool;
+
+ for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
+ scb = adapter->kscb_list + i;
+ ccb = raid_dev->ccb_list + i;
+
+ ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
+ ccb->raw_mbox = (uint8_t *)ccb->mbox;
+ ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
+ ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
+
+ // make sure the mailbox is aligned properly
+ if (ccb->mbox_dma_h & 0x0F) {
+ con_log(CL_ANN, (KERN_CRIT
+ "megaraid mbox: not aligned on 16-bytes\n"));
+
+ goto out_teardown_dma_pools;
+ }
+
+ ccb->epthru = (mraid_epassthru_t *)
+ epthru_pci_blk[i].vaddr;
+ ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr;
+ ccb->pthru = (mraid_passthru_t *)ccb->epthru;
+ ccb->pthru_dma_h = ccb->epthru_dma_h;
+
+
+ ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
+ ccb->sgl_dma_h = sg_pci_blk[i].dma_addr;
+ ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64;
+
+ scb->ccb = (caddr_t)ccb;
+ scb->gp = 0;
+
+ scb->sno = i; // command index
+
+ scb->scp = NULL;
+ scb->state = SCB_FREE;
+ scb->dma_direction = PCI_DMA_NONE;
+ scb->dma_type = MRAID_DMA_NONE;
+ scb->dev_channel = -1;
+ scb->dev_target = -1;
+
+ // put scb in the free pool
+ list_add_tail(&scb->list, &adapter->kscb_pool);
+ }
+
+ return 0;
+
+out_teardown_dma_pools:
+ megaraid_mbox_teardown_dma_pools(adapter);
+out_free_scb_list:
+ kfree(adapter->kscb_list);
+out_free_ibuf:
+ pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
+ adapter->ibuf_dma_h);
+out_free_common_mbox:
+ pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
+ (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
+
+ return -1;
+}
+
+
+/**
+ * megaraid_free_cmd_packets - free memory
+ * @adapter : soft state of the raid controller
+ *
+ * Release memory resources allocated for commands.
+ */
+static void
+megaraid_free_cmd_packets(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+
+ megaraid_mbox_teardown_dma_pools(adapter);
+
+ kfree(adapter->kscb_list);
+
+ pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
+ (void *)adapter->ibuf, adapter->ibuf_dma_h);
+
+ pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
+ (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
+ return;
+}
+
+
+/**
+ * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
+ * @adapter : HBA soft state
+ *
+ * Setup the dma pools for mailbox, passthru and extended passthru structures,
+ * and scatter-gather lists.
+ */
+static int
+megaraid_mbox_setup_dma_pools(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ struct mraid_pci_blk *epthru_pci_blk;
+ struct mraid_pci_blk *sg_pci_blk;
+ struct mraid_pci_blk *mbox_pci_blk;
+ int i;
+
+
+
+ // Allocate memory for 16-bytes aligned mailboxes
+ raid_dev->mbox_pool_handle = 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
+ * @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
+ * @scp : pointer to the scsi command to be executed
+ *
+ * Return the scb from the head of the free list. %NULL if there are none
+ * available.
+ */
+static scb_t *
+megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
+{
+ struct list_head *head = &adapter->kscb_pool;
+ scb_t *scb = NULL;
+ unsigned long flags;
+
+ // detach scb from free pool
+ spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
+
+ if (list_empty(head)) {
+ spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
+ return NULL;
+ }
+
+ scb = list_entry(head->next, scb_t, list);
+ list_del_init(&scb->list);
+
+ spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
+
+ scb->state = SCB_ACTIVE;
+ scb->scp = scp;
+ scb->dma_type = MRAID_DMA_NONE;
+
+ return scb;
+}
+
+
+/**
+ * megaraid_dealloc_scb - return the scb to the free pool
+ * @adapter : controller's soft state
+ * @scb : scb to be freed
+ *
+ * Return the scb back to the free list of scbs. The caller must 'flush' the
+ * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
+ * NOTE NOTE: Make sure the scb is not on any list before calling this
+ * routine.
+ */
+static inline void
+megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
+{
+ unsigned long flags;
+
+ // put scb in the free pool
+ scb->state = SCB_FREE;
+ scb->scp = NULL;
+ spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
+
+ list_add(&scb->list, &adapter->kscb_pool);
+
+ spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_mksgl - make the scatter-gather list
+ * @adapter : controller's soft state
+ * @scb : scsi control block
+ *
+ * Prepare the scatter-gather list.
+ */
+static int
+megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
+{
+ struct scatterlist *sgl;
+ mbox_ccb_t *ccb;
+ struct scsi_cmnd *scp;
+ int sgcnt;
+ int i;
+
+
+ scp = scb->scp;
+ ccb = (mbox_ccb_t *)scb->ccb;
+
+ sgcnt = scsi_dma_map(scp);
+ BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
+
+ // no mapping required if no data to be transferred
+ if (!sgcnt)
+ return 0;
+
+ scb->dma_type = MRAID_DMA_WSG;
+
+ scsi_for_each_sg(scp, sgl, sgcnt, i) {
+ ccb->sgl64[i].address = sg_dma_address(sgl);
+ ccb->sgl64[i].length = sg_dma_len(sgl);
+ }
+
+ // Return count of SG nodes
+ return sgcnt;
+}
+
+
+/**
+ * mbox_post_cmd - issue a mailbox command
+ * @adapter : controller's soft state
+ * @scb : command to be issued
+ *
+ * Post the command to the controller if mailbox is available.
+ */
+static int
+mbox_post_cmd(adapter_t *adapter, scb_t *scb)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox64_t *mbox64;
+ mbox_t *mbox;
+ mbox_ccb_t *ccb;
+ unsigned long flags;
+ unsigned int i = 0;
+
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ mbox = raid_dev->mbox;
+ mbox64 = raid_dev->mbox64;
+
+ /*
+ * Check for busy mailbox. If it is, return failure - the caller
+ * should retry later.
+ */
+ spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
+
+ if (unlikely(mbox->busy)) {
+ do {
+ udelay(1);
+ i++;
+ rmb();
+ } while(mbox->busy && (i < max_mbox_busy_wait));
+
+ if (mbox->busy) {
+
+ spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
+
+ return -1;
+ }
+ }
+
+
+ // Copy this command's mailbox data into "adapter's" mailbox
+ memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
+ mbox->cmdid = scb->sno;
+
+ adapter->outstanding_cmds++;
+
+ if (scb->dma_direction == PCI_DMA_TODEVICE)
+ pci_dma_sync_sg_for_device(adapter->pdev,
+ scsi_sglist(scb->scp),
+ scsi_sg_count(scb->scp),
+ PCI_DMA_TODEVICE);
+
+ mbox->busy = 1; // Set busy
+ mbox->poll = 0;
+ mbox->ack = 0;
+ wmb();
+
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
+
+ spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
+
+ return 0;
+}
+
+
+/**
+ * megaraid_queue_command - generic queue entry point for all LLDs
+ * @scp : pointer to the scsi command to be executed
+ * @done : callback routine to be called after the cmd has be completed
+ *
+ * Queue entry point for mailbox based controllers.
+ */
+static int
+megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
+{
+ adapter_t *adapter;
+ scb_t *scb;
+ int if_busy;
+
+ adapter = SCP2ADAPTER(scp);
+ scp->scsi_done = done;
+ scp->result = 0;
+
+ /*
+ * Allocate and build a SCB request
+ * if_busy flag will be set if megaraid_mbox_build_cmd() command could
+ * not allocate scb. We will return non-zero status in that case.
+ * NOTE: scb can be null even though certain commands completed
+ * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
+ * return 0 in that case, and we would do the callback right away.
+ */
+ if_busy = 0;
+ scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
+ if (!scb) { // command already completed
+ done(scp);
+ return 0;
+ }
+
+ megaraid_mbox_runpendq(adapter, scb);
+ return if_busy;
+}
+
+static DEF_SCSI_QCMD(megaraid_queue_command)
+
+/**
+ * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
+ * @adapter : controller's soft state
+ * @scp : mid-layer scsi command pointer
+ * @busy : set if request could not be completed because of lack of
+ * resources
+ *
+ * Transform the mid-layer scsi command to megaraid firmware lingua.
+ * Convert the command issued by mid-layer to format understood by megaraid
+ * firmware. We also complete certain commands without sending them to firmware.
+ */
+static scb_t *
+megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
+{
+ mraid_device_t *rdev = ADAP2RAIDDEV(adapter);
+ int channel;
+ int target;
+ int islogical;
+ mbox_ccb_t *ccb;
+ mraid_passthru_t *pthru;
+ mbox64_t *mbox64;
+ mbox_t *mbox;
+ scb_t *scb;
+ char skip[] = "skipping";
+ char scan[] = "scanning";
+ char *ss;
+
+
+ /*
+ * Get the appropriate device map for the device this command is
+ * intended for
+ */
+ MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
+
+ /*
+ * Logical drive commands
+ */
+ if (islogical) {
+ switch (scp->cmnd[0]) {
+ case TEST_UNIT_READY:
+ /*
+ * Do we support clustering and is the support enabled
+ * If no, return success always
+ */
+ if (!adapter->ha) {
+ scp->result = (DID_OK << 16);
+ return NULL;
+ }
+
+ if (!(scb = megaraid_alloc_scb(adapter, scp))) {
+ scp->result = (DID_ERROR << 16);
+ *busy = 1;
+ return NULL;
+ }
+
+ scb->dma_direction = scp->sc_data_direction;
+ scb->dev_channel = 0xFF;
+ scb->dev_target = target;
+ ccb = (mbox_ccb_t *)scb->ccb;
+
+ /*
+ * The command id will be provided by the command
+ * issuance routine
+ */
+ ccb->raw_mbox[0] = CLUSTER_CMD;
+ ccb->raw_mbox[2] = RESERVATION_STATUS;
+ ccb->raw_mbox[3] = target;
+
+ return scb;
+
+ case MODE_SENSE:
+ {
+ struct scatterlist *sgl;
+ caddr_t vaddr;
+
+ sgl = scsi_sglist(scp);
+ if (sg_page(sgl)) {
+ vaddr = (caddr_t) sg_virt(&sgl[0]);
+
+ memset(vaddr, 0, scp->cmnd[4]);
+ }
+ else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mailbox: invalid sg:%d\n",
+ __LINE__));
+ }
+ }
+ scp->result = (DID_OK << 16);
+ return NULL;
+
+ case INQUIRY:
+ /*
+ * Display the channel scan for logical drives
+ * Do not display scan for a channel if already done.
+ */
+ if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
+
+ con_log(CL_ANN, (KERN_INFO
+ "scsi[%d]: scanning scsi channel %d",
+ adapter->host->host_no,
+ SCP2CHANNEL(scp)));
+
+ con_log(CL_ANN, (
+ " [virtual] for logical drives\n"));
+
+ rdev->last_disp |= (1L << SCP2CHANNEL(scp));
+ }
+
+ if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
+ scp->sense_buffer[0] = 0x70;
+ scp->sense_buffer[2] = ILLEGAL_REQUEST;
+ scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
+ scp->result = CHECK_CONDITION << 1;
+ return NULL;
+ }
+
+ /* Fall through */
+
+ case READ_CAPACITY:
+ /*
+ * Do not allow LUN > 0 for logical drives and
+ * requests for more than 40 logical drives
+ */
+ if (SCP2LUN(scp)) {
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+ if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+
+
+ /* Allocate a SCB and initialize passthru */
+ if (!(scb = megaraid_alloc_scb(adapter, scp))) {
+ scp->result = (DID_ERROR << 16);
+ *busy = 1;
+ return NULL;
+ }
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ scb->dev_channel = 0xFF;
+ scb->dev_target = target;
+ pthru = ccb->pthru;
+ mbox = ccb->mbox;
+ mbox64 = ccb->mbox64;
+
+ pthru->timeout = 0;
+ pthru->ars = 1;
+ pthru->reqsenselen = 14;
+ pthru->islogical = 1;
+ pthru->logdrv = target;
+ pthru->cdblen = scp->cmd_len;
+ memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
+
+ mbox->cmd = MBOXCMD_PASSTHRU64;
+ scb->dma_direction = scp->sc_data_direction;
+
+ pthru->dataxferlen = scsi_bufflen(scp);
+ pthru->dataxferaddr = ccb->sgl_dma_h;
+ pthru->numsge = megaraid_mbox_mksgl(adapter,
+ scb);
+
+ mbox->xferaddr = 0xFFFFFFFF;
+ mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h;
+ mbox64->xferaddr_hi = 0;
+
+ return scb;
+
+ case READ_6:
+ case WRITE_6:
+ case READ_10:
+ case WRITE_10:
+ case READ_12:
+ case WRITE_12:
+
+ /*
+ * Allocate a SCB and initialize mailbox
+ */
+ if (!(scb = megaraid_alloc_scb(adapter, scp))) {
+ scp->result = (DID_ERROR << 16);
+ *busy = 1;
+ return NULL;
+ }
+ ccb = (mbox_ccb_t *)scb->ccb;
+ scb->dev_channel = 0xFF;
+ scb->dev_target = target;
+ mbox = ccb->mbox;
+ mbox64 = ccb->mbox64;
+ mbox->logdrv = target;
+
+ /*
+ * A little HACK: 2nd bit is zero for all scsi read
+ * commands and is set for all scsi write commands
+ */
+ mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64:
+ MBOXCMD_LREAD64 ;
+
+ /*
+ * 6-byte READ(0x08) or WRITE(0x0A) cdb
+ */
+ if (scp->cmd_len == 6) {
+ mbox->numsectors = (uint32_t)scp->cmnd[4];
+ mbox->lba =
+ ((uint32_t)scp->cmnd[1] << 16) |
+ ((uint32_t)scp->cmnd[2] << 8) |
+ (uint32_t)scp->cmnd[3];
+
+ mbox->lba &= 0x1FFFFF;
+ }
+
+ /*
+ * 10-byte READ(0x28) or WRITE(0x2A) cdb
+ */
+ else if (scp->cmd_len == 10) {
+ mbox->numsectors =
+ (uint32_t)scp->cmnd[8] |
+ ((uint32_t)scp->cmnd[7] << 8);
+ mbox->lba =
+ ((uint32_t)scp->cmnd[2] << 24) |
+ ((uint32_t)scp->cmnd[3] << 16) |
+ ((uint32_t)scp->cmnd[4] << 8) |
+ (uint32_t)scp->cmnd[5];
+ }
+
+ /*
+ * 12-byte READ(0xA8) or WRITE(0xAA) cdb
+ */
+ else if (scp->cmd_len == 12) {
+ mbox->lba =
+ ((uint32_t)scp->cmnd[2] << 24) |
+ ((uint32_t)scp->cmnd[3] << 16) |
+ ((uint32_t)scp->cmnd[4] << 8) |
+ (uint32_t)scp->cmnd[5];
+
+ mbox->numsectors =
+ ((uint32_t)scp->cmnd[6] << 24) |
+ ((uint32_t)scp->cmnd[7] << 16) |
+ ((uint32_t)scp->cmnd[8] << 8) |
+ (uint32_t)scp->cmnd[9];
+ }
+ else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: unsupported CDB length\n"));
+
+ megaraid_dealloc_scb(adapter, scb);
+
+ scp->result = (DID_ERROR << 16);
+ return NULL;
+ }
+
+ scb->dma_direction = scp->sc_data_direction;
+
+ // Calculate Scatter-Gather info
+ mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h;
+ mbox->numsge = megaraid_mbox_mksgl(adapter,
+ scb);
+ mbox->xferaddr = 0xFFFFFFFF;
+ mbox64->xferaddr_hi = 0;
+
+ return scb;
+
+ case RESERVE:
+ case RELEASE:
+ /*
+ * Do we support clustering and is the support enabled
+ */
+ if (!adapter->ha) {
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+
+ /*
+ * Allocate a SCB and initialize mailbox
+ */
+ if (!(scb = megaraid_alloc_scb(adapter, scp))) {
+ scp->result = (DID_ERROR << 16);
+ *busy = 1;
+ return NULL;
+ }
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ scb->dev_channel = 0xFF;
+ scb->dev_target = target;
+ ccb->raw_mbox[0] = CLUSTER_CMD;
+ ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ?
+ RESERVE_LD : RELEASE_LD;
+
+ ccb->raw_mbox[3] = target;
+ scb->dma_direction = scp->sc_data_direction;
+
+ return scb;
+
+ default:
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+ }
+ else { // Passthru device commands
+
+ // Do not allow access to target id > 15 or LUN > 7
+ if (target > 15 || SCP2LUN(scp) > 7) {
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+
+ // if fast load option was set and scan for last device is
+ // over, reset the fast_load flag so that during a possible
+ // next scan, devices can be made available
+ if (rdev->fast_load && (target == 15) &&
+ (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
+
+ con_log(CL_ANN, (KERN_INFO
+ "megaraid[%d]: physical device scan re-enabled\n",
+ adapter->host->host_no));
+ rdev->fast_load = 0;
+ }
+
+ /*
+ * Display the channel scan for physical devices
+ */
+ if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
+
+ ss = rdev->fast_load ? skip : scan;
+
+ con_log(CL_ANN, (KERN_INFO
+ "scsi[%d]: %s scsi channel %d [Phy %d]",
+ adapter->host->host_no, ss, SCP2CHANNEL(scp),
+ channel));
+
+ con_log(CL_ANN, (
+ " for non-raid devices\n"));
+
+ rdev->last_disp |= (1L << SCP2CHANNEL(scp));
+ }
+
+ // disable channel sweep if fast load option given
+ if (rdev->fast_load) {
+ scp->result = (DID_BAD_TARGET << 16);
+ return NULL;
+ }
+
+ // Allocate a SCB and initialize passthru
+ if (!(scb = megaraid_alloc_scb(adapter, scp))) {
+ scp->result = (DID_ERROR << 16);
+ *busy = 1;
+ return NULL;
+ }
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ scb->dev_channel = channel;
+ scb->dev_target = target;
+ scb->dma_direction = scp->sc_data_direction;
+ mbox = ccb->mbox;
+ mbox64 = ccb->mbox64;
+
+ // Does this firmware support extended CDBs
+ if (adapter->max_cdb_sz == 16) {
+ mbox->cmd = MBOXCMD_EXTPTHRU;
+
+ megaraid_mbox_prepare_epthru(adapter, scb, scp);
+
+ mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h;
+ mbox64->xferaddr_hi = 0;
+ mbox->xferaddr = 0xFFFFFFFF;
+ }
+ else {
+ mbox->cmd = MBOXCMD_PASSTHRU64;
+
+ megaraid_mbox_prepare_pthru(adapter, scb, scp);
+
+ mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h;
+ mbox64->xferaddr_hi = 0;
+ mbox->xferaddr = 0xFFFFFFFF;
+ }
+ return scb;
+ }
+
+ // NOT REACHED
+}
+
+
+/**
+ * megaraid_mbox_runpendq - execute commands queued in the pending queue
+ * @adapter : controller's soft state
+ * @scb_q : SCB to be queued in the pending list
+ *
+ * Scan the pending list for commands which are not yet issued and try to
+ * post to the controller. The SCB can be a null pointer, which would indicate
+ * no SCB to be queue, just try to execute the ones in the pending list.
+ *
+ * NOTE: We do not actually traverse the pending list. The SCBs are plucked
+ * out from the head of the pending list. If it is successfully issued, the
+ * next SCB is at the head now.
+ */
+static void
+megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
+{
+ scb_t *scb;
+ unsigned long flags;
+
+ spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
+
+ if (scb_q) {
+ scb_q->state = SCB_PENDQ;
+ list_add_tail(&scb_q->list, &adapter->pend_list);
+ }
+
+ // if the adapter in not in quiescent mode, post the commands to FW
+ if (adapter->quiescent) {
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
+ return;
+ }
+
+ while (!list_empty(&adapter->pend_list)) {
+
+ assert_spin_locked(PENDING_LIST_LOCK(adapter));
+
+ scb = list_entry(adapter->pend_list.next, scb_t, list);
+
+ // remove the scb from the pending list and try to
+ // issue. If we are unable to issue it, put back in
+ // the pending list and return
+
+ list_del_init(&scb->list);
+
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
+
+ // if mailbox was busy, return SCB back to pending
+ // list. Make sure to add at the head, since that's
+ // where it would have been removed from
+
+ scb->state = SCB_ISSUED;
+
+ if (mbox_post_cmd(adapter, scb) != 0) {
+
+ spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
+
+ scb->state = SCB_PENDQ;
+
+ list_add(&scb->list, &adapter->pend_list);
+
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
+ flags);
+
+ return;
+ }
+
+ spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
+ }
+
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
+
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_prepare_pthru - prepare a command for physical devices
+ * @adapter : pointer to controller's soft state
+ * @scb : scsi control block
+ * @scp : scsi command from the mid-layer
+ *
+ * Prepare a command for the scsi physical devices.
+ */
+static void
+megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
+ struct scsi_cmnd *scp)
+{
+ mbox_ccb_t *ccb;
+ mraid_passthru_t *pthru;
+ uint8_t channel;
+ uint8_t target;
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ pthru = ccb->pthru;
+ channel = scb->dev_channel;
+ target = scb->dev_target;
+
+ // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
+ pthru->timeout = 4;
+ pthru->ars = 1;
+ pthru->islogical = 0;
+ pthru->channel = 0;
+ pthru->target = (channel << 4) | target;
+ pthru->logdrv = SCP2LUN(scp);
+ pthru->reqsenselen = 14;
+ pthru->cdblen = scp->cmd_len;
+
+ memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
+
+ if (scsi_bufflen(scp)) {
+ pthru->dataxferlen = scsi_bufflen(scp);
+ pthru->dataxferaddr = ccb->sgl_dma_h;
+ pthru->numsge = megaraid_mbox_mksgl(adapter, scb);
+ }
+ else {
+ pthru->dataxferaddr = 0;
+ pthru->dataxferlen = 0;
+ pthru->numsge = 0;
+ }
+ return;
+}
+
+
+/**
+ * megaraid_mbox_prepare_epthru - prepare a command for physical devices
+ * @adapter : pointer to controller's soft state
+ * @scb : scsi control block
+ * @scp : scsi command from the mid-layer
+ *
+ * Prepare a command for the scsi physical devices. This routine prepares
+ * commands for devices which can take extended CDBs (>10 bytes).
+ */
+static void
+megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
+ struct scsi_cmnd *scp)
+{
+ mbox_ccb_t *ccb;
+ mraid_epassthru_t *epthru;
+ uint8_t channel;
+ uint8_t target;
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ epthru = ccb->epthru;
+ channel = scb->dev_channel;
+ target = scb->dev_target;
+
+ // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
+ epthru->timeout = 4;
+ epthru->ars = 1;
+ epthru->islogical = 0;
+ epthru->channel = 0;
+ epthru->target = (channel << 4) | target;
+ epthru->logdrv = SCP2LUN(scp);
+ epthru->reqsenselen = 14;
+ epthru->cdblen = scp->cmd_len;
+
+ memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
+
+ if (scsi_bufflen(scp)) {
+ epthru->dataxferlen = scsi_bufflen(scp);
+ epthru->dataxferaddr = ccb->sgl_dma_h;
+ epthru->numsge = megaraid_mbox_mksgl(adapter, scb);
+ }
+ else {
+ epthru->dataxferaddr = 0;
+ epthru->dataxferlen = 0;
+ epthru->numsge = 0;
+ }
+ return;
+}
+
+
+/**
+ * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
+ * @adapter : controller's soft state
+ *
+ * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
+ * completed command and put them on the completed list for later processing.
+ *
+ * Returns: 1 if the interrupt is valid, 0 otherwise
+ */
+static int
+megaraid_ack_sequence(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox_t *mbox;
+ scb_t *scb;
+ uint8_t nstatus;
+ uint8_t completed[MBOX_MAX_FIRMWARE_STATUS];
+ struct list_head clist;
+ int handled;
+ uint32_t dword;
+ unsigned long flags;
+ int i, j;
+
+
+ mbox = raid_dev->mbox;
+
+ // move the SCBs from the firmware completed array to our local list
+ INIT_LIST_HEAD(&clist);
+
+ // loop till F/W has more commands for us to complete
+ handled = 0;
+ spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
+ do {
+ /*
+ * Check if a valid interrupt is pending. If found, force the
+ * interrupt line low.
+ */
+ dword = RDOUTDOOR(raid_dev);
+ if (dword != 0x10001234) break;
+
+ handled = 1;
+
+ WROUTDOOR(raid_dev, 0x10001234);
+
+ nstatus = 0;
+ // wait for valid numstatus to post
+ for (i = 0; i < 0xFFFFF; i++) {
+ if (mbox->numstatus != 0xFF) {
+ nstatus = mbox->numstatus;
+ break;
+ }
+ rmb();
+ }
+ mbox->numstatus = 0xFF;
+
+ adapter->outstanding_cmds -= nstatus;
+
+ for (i = 0; i < nstatus; i++) {
+
+ // wait for valid command index to post
+ for (j = 0; j < 0xFFFFF; j++) {
+ if (mbox->completed[i] != 0xFF) break;
+ rmb();
+ }
+ completed[i] = mbox->completed[i];
+ mbox->completed[i] = 0xFF;
+
+ if (completed[i] == 0xFF) {
+ con_log(CL_ANN, (KERN_CRIT
+ "megaraid: command posting timed out\n"));
+
+ BUG();
+ continue;
+ }
+
+ // Get SCB associated with this command id
+ if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
+ // a cmm command
+ scb = adapter->uscb_list + (completed[i] -
+ MBOX_MAX_SCSI_CMDS);
+ }
+ else {
+ // an os command
+ scb = adapter->kscb_list + completed[i];
+ }
+
+ scb->status = mbox->status;
+ list_add_tail(&scb->list, &clist);
+ }
+
+ // Acknowledge interrupt
+ WRINDOOR(raid_dev, 0x02);
+
+ } while(1);
+
+ spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
+
+
+ // put the completed commands in the completed list. DPC would
+ // complete these commands later
+ spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
+
+ list_splice(&clist, &adapter->completed_list);
+
+ spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
+
+
+ // schedule the DPC if there is some work for it
+ if (handled)
+ tasklet_schedule(&adapter->dpc_h);
+
+ return handled;
+}
+
+
+/**
+ * megaraid_isr - isr for memory based mailbox based controllers
+ * @irq : irq
+ * @devp : pointer to our soft state
+ *
+ * Interrupt service routine for memory-mapped mailbox controllers.
+ */
+static irqreturn_t
+megaraid_isr(int irq, void *devp)
+{
+ adapter_t *adapter = devp;
+ int handled;
+
+ handled = megaraid_ack_sequence(adapter);
+
+ /* Loop through any pending requests */
+ if (!adapter->quiescent) {
+ megaraid_mbox_runpendq(adapter, NULL);
+ }
+
+ return IRQ_RETVAL(handled);
+}
+
+
+/**
+ * megaraid_mbox_sync_scb - sync kernel buffers
+ * @adapter : controller's soft state
+ * @scb : pointer to the resource packet
+ *
+ * DMA sync if required.
+ */
+static void
+megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
+{
+ mbox_ccb_t *ccb;
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+
+ if (scb->dma_direction == PCI_DMA_FROMDEVICE)
+ pci_dma_sync_sg_for_cpu(adapter->pdev,
+ scsi_sglist(scb->scp),
+ scsi_sg_count(scb->scp),
+ PCI_DMA_FROMDEVICE);
+
+ scsi_dma_unmap(scb->scp);
+ return;
+}
+
+
+/**
+ * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
+ * @devp : pointer to HBA soft state
+ *
+ * Pick up the commands from the completed list and send back to the owners.
+ * This is a reentrant function and does not assume any locks are held while
+ * it is being called.
+ */
+static void
+megaraid_mbox_dpc(unsigned long devp)
+{
+ adapter_t *adapter = (adapter_t *)devp;
+ mraid_device_t *raid_dev;
+ struct list_head clist;
+ struct scatterlist *sgl;
+ scb_t *scb;
+ scb_t *tmp;
+ struct scsi_cmnd *scp;
+ mraid_passthru_t *pthru;
+ mraid_epassthru_t *epthru;
+ mbox_ccb_t *ccb;
+ int islogical;
+ int pdev_index;
+ int pdev_state;
+ mbox_t *mbox;
+ unsigned long flags;
+ uint8_t c;
+ int status;
+ uioc_t *kioc;
+
+
+ if (!adapter) return;
+
+ raid_dev = ADAP2RAIDDEV(adapter);
+
+ // move the SCBs from the completed list to our local list
+ INIT_LIST_HEAD(&clist);
+
+ spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
+
+ list_splice_init(&adapter->completed_list, &clist);
+
+ spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
+
+
+ list_for_each_entry_safe(scb, tmp, &clist, list) {
+
+ status = scb->status;
+ scp = scb->scp;
+ ccb = (mbox_ccb_t *)scb->ccb;
+ pthru = ccb->pthru;
+ epthru = ccb->epthru;
+ mbox = ccb->mbox;
+
+ // Make sure f/w has completed a valid command
+ if (scb->state != SCB_ISSUED) {
+ con_log(CL_ANN, (KERN_CRIT
+ "megaraid critical err: invalid command %d:%d:%p\n",
+ scb->sno, scb->state, scp));
+ BUG();
+ continue; // Must never happen!
+ }
+
+ // check for the management command and complete it right away
+ if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
+ scb->state = SCB_FREE;
+ scb->status = status;
+
+ // remove from local clist
+ list_del_init(&scb->list);
+
+ kioc = (uioc_t *)scb->gp;
+ kioc->status = 0;
+
+ megaraid_mbox_mm_done(adapter, scb);
+
+ continue;
+ }
+
+ // Was an abort issued for this command earlier
+ if (scb->state & SCB_ABORT) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: aborted cmd [%x] completed\n",
+ scb->sno));
+ }
+
+ /*
+ * If the inquiry came of a disk drive which is not part of
+ * any RAID array, expose it to the kernel. For this to be
+ * enabled, user must set the "megaraid_expose_unconf_disks"
+ * flag to 1 by specifying it on module parameter list.
+ * This would enable data migration off drives from other
+ * configurations.
+ */
+ islogical = MRAID_IS_LOGICAL(adapter, scp);
+ if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
+ && IS_RAID_CH(raid_dev, scb->dev_channel)) {
+
+ sgl = scsi_sglist(scp);
+ if (sg_page(sgl)) {
+ c = *(unsigned char *) sg_virt(&sgl[0]);
+ } else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mailbox: invalid sg:%d\n",
+ __LINE__));
+ c = 0;
+ }
+
+ if ((c & 0x1F ) == TYPE_DISK) {
+ pdev_index = (scb->dev_channel * 16) +
+ scb->dev_target;
+ pdev_state =
+ raid_dev->pdrv_state[pdev_index] & 0x0F;
+
+ if (pdev_state == PDRV_ONLINE ||
+ pdev_state == PDRV_FAILED ||
+ pdev_state == PDRV_RBLD ||
+ pdev_state == PDRV_HOTSPARE ||
+ megaraid_expose_unconf_disks == 0) {
+
+ status = 0xF0;
+ }
+ }
+ }
+
+ // Convert MegaRAID status to Linux error code
+ switch (status) {
+
+ case 0x00:
+
+ scp->result = (DID_OK << 16);
+ break;
+
+ case 0x02:
+
+ /* set sense_buffer and result fields */
+ if (mbox->cmd == MBOXCMD_PASSTHRU ||
+ mbox->cmd == MBOXCMD_PASSTHRU64) {
+
+ memcpy(scp->sense_buffer, pthru->reqsensearea,
+ 14);
+
+ scp->result = DRIVER_SENSE << 24 |
+ DID_OK << 16 | CHECK_CONDITION << 1;
+ }
+ else {
+ if (mbox->cmd == MBOXCMD_EXTPTHRU) {
+
+ memcpy(scp->sense_buffer,
+ epthru->reqsensearea, 14);
+
+ scp->result = DRIVER_SENSE << 24 |
+ DID_OK << 16 |
+ CHECK_CONDITION << 1;
+ } else {
+ scp->sense_buffer[0] = 0x70;
+ scp->sense_buffer[2] = ABORTED_COMMAND;
+ scp->result = CHECK_CONDITION << 1;
+ }
+ }
+ break;
+
+ case 0x08:
+
+ scp->result = DID_BUS_BUSY << 16 | status;
+ break;
+
+ default:
+
+ /*
+ * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
+ * failed
+ */
+ if (scp->cmnd[0] == TEST_UNIT_READY) {
+ scp->result = DID_ERROR << 16 |
+ RESERVATION_CONFLICT << 1;
+ }
+ else
+ /*
+ * Error code returned is 1 if Reserve or Release
+ * failed or the input parameter is invalid
+ */
+ if (status == 1 && (scp->cmnd[0] == RESERVE ||
+ scp->cmnd[0] == RELEASE)) {
+
+ scp->result = DID_ERROR << 16 |
+ RESERVATION_CONFLICT << 1;
+ }
+ else {
+ scp->result = DID_BAD_TARGET << 16 | status;
+ }
+ }
+
+ // print a debug message for all failed commands
+ if (status) {
+ megaraid_mbox_display_scb(adapter, scb);
+ }
+
+ // Free our internal resources and call the mid-layer callback
+ // routine
+ megaraid_mbox_sync_scb(adapter, scb);
+
+ // remove from local clist
+ list_del_init(&scb->list);
+
+ // put back in free list
+ megaraid_dealloc_scb(adapter, scb);
+
+ // send the scsi packet back to kernel
+ scp->scsi_done(scp);
+ }
+
+ return;
+}
+
+
+/**
+ * megaraid_abort_handler - abort the scsi command
+ * @scp : command to be aborted
+ *
+ * Abort a previous SCSI request. Only commands on the pending list can be
+ * aborted. All the commands issued to the F/W must complete.
+ **/
+static int
+megaraid_abort_handler(struct scsi_cmnd *scp)
+{
+ adapter_t *adapter;
+ mraid_device_t *raid_dev;
+ scb_t *scb;
+ scb_t *tmp;
+ int found;
+ unsigned long flags;
+ int i;
+
+
+ adapter = SCP2ADAPTER(scp);
+ raid_dev = ADAP2RAIDDEV(adapter);
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
+ scp->cmnd[0], SCP2CHANNEL(scp),
+ SCP2TARGET(scp), SCP2LUN(scp)));
+
+ // If FW has stopped responding, simply return failure
+ if (raid_dev->hw_error) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: hw error, not aborting\n"));
+ return FAILED;
+ }
+
+ // There might a race here, where the command was completed by the
+ // firmware and now it is on the completed list. Before we could
+ // complete the command to the kernel in dpc, the abort came.
+ // Find out if this is the case to avoid the race.
+ scb = NULL;
+ spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
+ list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
+
+ if (scb->scp == scp) { // Found command
+
+ list_del_init(&scb->list); // from completed list
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: %d[%d:%d], abort from completed list\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+
+ scp->result = (DID_ABORT << 16);
+ scp->scsi_done(scp);
+
+ megaraid_dealloc_scb(adapter, scb);
+
+ spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
+ flags);
+
+ return SUCCESS;
+ }
+ }
+ spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
+
+
+ // Find out if this command is still on the pending list. If it is and
+ // was never issued, abort and return success. If the command is owned
+ // by the firmware, we must wait for it to complete by the FW.
+ spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
+ list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
+
+ if (scb->scp == scp) { // Found command
+
+ list_del_init(&scb->list); // from pending list
+
+ ASSERT(!(scb->state & SCB_ISSUED));
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid abort: [%d:%d], driver owner\n",
+ scb->dev_channel, scb->dev_target));
+
+ scp->result = (DID_ABORT << 16);
+ scp->scsi_done(scp);
+
+ megaraid_dealloc_scb(adapter, scb);
+
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
+ flags);
+
+ return SUCCESS;
+ }
+ }
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
+
+
+ // Check do we even own this command, in which case this would be
+ // owned by the firmware. The only way to locate the FW scb is to
+ // traverse through the list of all SCB, since driver does not
+ // maintain these SCBs on any list
+ found = 0;
+ spin_lock_irq(&adapter->lock);
+ for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
+ scb = adapter->kscb_list + i;
+
+ if (scb->scp == scp) {
+
+ found = 1;
+
+ if (!(scb->state & SCB_ISSUED)) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid abort: %d[%d:%d], invalid state\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+ BUG();
+ }
+ else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid abort: %d[%d:%d], fw owner\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+ }
+ }
+ }
+ spin_unlock_irq(&adapter->lock);
+
+ if (!found) {
+ con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
+
+ // FIXME: Should there be a callback for this command?
+ return SUCCESS;
+ }
+
+ // We cannot actually abort a command owned by firmware, return
+ // failure and wait for reset. In host reset handler, we will find out
+ // if the HBA is still live
+ return FAILED;
+}
+
+/**
+ * megaraid_reset_handler - device reset handler for mailbox based driver
+ * @scp : reference command
+ *
+ * Reset handler for the mailbox based controller. First try to find out if
+ * the FW is still live, in which case the outstanding commands counter mut go
+ * down to 0. If that happens, also issue the reservation reset command to
+ * relinquish (possible) reservations on the logical drives connected to this
+ * host.
+ **/
+static int
+megaraid_reset_handler(struct scsi_cmnd *scp)
+{
+ adapter_t *adapter;
+ scb_t *scb;
+ scb_t *tmp;
+ mraid_device_t *raid_dev;
+ unsigned long flags;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ int rval;
+ int recovery_window;
+ int recovering;
+ int i;
+ uioc_t *kioc;
+
+ adapter = SCP2ADAPTER(scp);
+ raid_dev = ADAP2RAIDDEV(adapter);
+
+ // return failure if adapter is not responding
+ if (raid_dev->hw_error) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: hw error, cannot reset\n"));
+ return FAILED;
+ }
+
+
+ // Under exceptional conditions, FW can take up to 3 minutes to
+ // complete command processing. Wait for additional 2 minutes for the
+ // pending commands counter to go down to 0. If it doesn't, let the
+ // controller be marked offline
+ // Also, reset all the commands currently owned by the driver
+ spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
+ list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
+ list_del_init(&scb->list); // from pending list
+
+ if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+
+ scb->status = -1;
+
+ kioc = (uioc_t *)scb->gp;
+ kioc->status = -EFAULT;
+
+ megaraid_mbox_mm_done(adapter, scb);
+ } else {
+ if (scb->scp == scp) { // Found command
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: %d[%d:%d], reset from pending list\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+ } else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: IO packet with %d[%d:%d] being reset\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+ }
+
+ scb->scp->result = (DID_RESET << 16);
+ scb->scp->scsi_done(scb->scp);
+
+ megaraid_dealloc_scb(adapter, scb);
+ }
+ }
+ spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
+
+ if (adapter->outstanding_cmds) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: %d outstanding commands. Max wait %d sec\n",
+ adapter->outstanding_cmds,
+ (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
+ }
+
+ recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
+
+ recovering = adapter->outstanding_cmds;
+
+ for (i = 0; i < recovery_window; i++) {
+
+ megaraid_ack_sequence(adapter);
+
+ // print a message once every 5 seconds only
+ if (!(i % 5)) {
+ con_log(CL_ANN, (
+ "megaraid mbox: Wait for %d commands to complete:%d\n",
+ adapter->outstanding_cmds,
+ (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
+ }
+
+ // bailout if no recovery happened in reset time
+ if (adapter->outstanding_cmds == 0) {
+ break;
+ }
+
+ msleep(1000);
+ }
+
+ spin_lock(&adapter->lock);
+
+ // If still outstanding commands, bail out
+ if (adapter->outstanding_cmds) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mbox: critical hardware error!\n"));
+
+ raid_dev->hw_error = 1;
+
+ rval = FAILED;
+ goto out;
+ }
+ else {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid mbox: reset sequence completed successfully\n"));
+ }
+
+
+ // If the controller supports clustering, reset reservations
+ if (!adapter->ha) {
+ rval = SUCCESS;
+ goto out;
+ }
+
+ // clear reservations if any
+ raw_mbox[0] = CLUSTER_CMD;
+ raw_mbox[2] = RESET_RESERVATIONS;
+
+ rval = SUCCESS;
+ if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
+ con_log(CL_ANN,
+ (KERN_INFO "megaraid: reservation reset\n"));
+ }
+ else {
+ rval = FAILED;
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: reservation reset failed\n"));
+ }
+
+ out:
+ spin_unlock(&adapter->lock);
+ return rval;
+}
+
+/*
+ * START: internal commands library
+ *
+ * This section of the driver has the common routine used by the driver and
+ * also has all the FW routines
+ */
+
+/**
+ * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
+ * @adapter : controller's soft state
+ * @raw_mbox : the mailbox
+ *
+ * Issue a scb in synchronous and non-interrupt mode for mailbox based
+ * controllers.
+ */
+static int
+mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox64_t *mbox64;
+ mbox_t *mbox;
+ uint8_t status;
+ int i;
+
+
+ mbox64 = raid_dev->mbox64;
+ mbox = raid_dev->mbox;
+
+ /*
+ * Wait until mailbox is free
+ */
+ if (megaraid_busywait_mbox(raid_dev) != 0)
+ goto blocked_mailbox;
+
+ /*
+ * Copy mailbox data into host structure
+ */
+ memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
+ mbox->cmdid = 0xFE;
+ mbox->busy = 1;
+ mbox->poll = 0;
+ mbox->ack = 0;
+ mbox->numstatus = 0xFF;
+ mbox->status = 0xFF;
+
+ wmb();
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
+
+ // wait for maximum 1 second for status to post. If the status is not
+ // available within 1 second, assume FW is initializing and wait
+ // for an extended amount of time
+ if (mbox->numstatus == 0xFF) { // status not yet available
+ udelay(25);
+
+ for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
+ rmb();
+ msleep(1);
+ }
+
+
+ if (i == 1000) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid mailbox: wait for FW to boot "));
+
+ for (i = 0; (mbox->numstatus == 0xFF) &&
+ (i < MBOX_RESET_WAIT); i++) {
+ rmb();
+ con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
+ MBOX_RESET_WAIT - i));
+ msleep(1000);
+ }
+
+ if (i == MBOX_RESET_WAIT) {
+
+ con_log(CL_ANN, (
+ "\nmegaraid mailbox: status not available\n"));
+
+ return -1;
+ }
+ con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
+ }
+ }
+
+ // wait for maximum 1 second for poll semaphore
+ if (mbox->poll != 0x77) {
+ udelay(25);
+
+ for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
+ rmb();
+ msleep(1);
+ }
+
+ if (i == 1000) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mailbox: could not get poll semaphore\n"));
+ return -1;
+ }
+ }
+
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
+ wmb();
+
+ // wait for maximum 1 second for acknowledgement
+ if (RDINDOOR(raid_dev) & 0x2) {
+ udelay(25);
+
+ for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
+ rmb();
+ msleep(1);
+ }
+
+ if (i == 1000) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mailbox: could not acknowledge\n"));
+ return -1;
+ }
+ }
+ mbox->poll = 0;
+ mbox->ack = 0x77;
+
+ status = mbox->status;
+
+ // invalidate the completed command id array. After command
+ // completion, firmware would write the valid id.
+ mbox->numstatus = 0xFF;
+ mbox->status = 0xFF;
+ for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
+ mbox->completed[i] = 0xFF;
+ }
+
+ return status;
+
+blocked_mailbox:
+
+ con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
+ return -1;
+}
+
+
+/**
+ * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
+ * @adapter : controller's soft state
+ * @raw_mbox : the mailbox
+ *
+ * Issue a scb in synchronous and non-interrupt mode for mailbox based
+ * controllers. This is a faster version of the synchronous command and
+ * therefore can be called in interrupt-context as well.
+ */
+static int
+mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox_t *mbox;
+ long i;
+
+
+ mbox = raid_dev->mbox;
+
+ // return immediately if the mailbox is busy
+ if (mbox->busy) return -1;
+
+ // Copy mailbox data into host structure
+ memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
+ mbox->cmdid = 0xFE;
+ mbox->busy = 1;
+ mbox->poll = 0;
+ mbox->ack = 0;
+ mbox->numstatus = 0xFF;
+ mbox->status = 0xFF;
+
+ wmb();
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
+
+ for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
+ if (mbox->numstatus != 0xFF) break;
+ rmb();
+ udelay(MBOX_SYNC_DELAY_200);
+ }
+
+ if (i == MBOX_SYNC_WAIT_CNT) {
+ // We may need to re-calibrate the counter
+ con_log(CL_ANN, (KERN_CRIT
+ "megaraid: fast sync command timed out\n"));
+ }
+
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
+ wmb();
+
+ return mbox->status;
+}
+
+
+/**
+ * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
+ * @raid_dev : RAID device (HBA) soft state
+ *
+ * Wait until the controller's mailbox is available to accept more commands.
+ * Wait for at most 1 second.
+ */
+static int
+megaraid_busywait_mbox(mraid_device_t *raid_dev)
+{
+ mbox_t *mbox = raid_dev->mbox;
+ int i = 0;
+
+ if (mbox->busy) {
+ udelay(25);
+ for (i = 0; mbox->busy && i < 1000; i++)
+ msleep(1);
+ }
+
+ if (i < 1000) return 0;
+ else return -1;
+}
+
+
+/**
+ * megaraid_mbox_product_info - some static information about the controller
+ * @adapter : our soft state
+ *
+ * Issue commands to the controller to grab some parameters required by our
+ * caller.
+ */
+static int
+megaraid_mbox_product_info(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ mraid_pinfo_t *pinfo;
+ dma_addr_t pinfo_dma_h;
+ mraid_inquiry3_t *mraid_inq3;
+ int i;
+
+
+ memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
+ mbox = (mbox_t *)raw_mbox;
+
+ /*
+ * Issue an ENQUIRY3 command to find out certain adapter parameters,
+ * e.g., max channels, max commands etc.
+ */
+ pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
+ &pinfo_dma_h);
+
+ if (pinfo == NULL) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+
+ return -1;
+ }
+
+ mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
+ memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+ raw_mbox[0] = FC_NEW_CONFIG;
+ raw_mbox[2] = NC_SUBOP_ENQUIRY3;
+ raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
+
+ // Issue the command
+ if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
+
+ pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
+ pinfo, pinfo_dma_h);
+
+ return -1;
+ }
+
+ /*
+ * Collect information about state of each physical drive
+ * attached to the controller. We will expose all the disks
+ * which are not part of RAID
+ */
+ mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
+ for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
+ raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
+ }
+
+ /*
+ * Get product info for information like number of channels,
+ * maximum commands supported.
+ */
+ memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
+ mbox->xferaddr = (uint32_t)pinfo_dma_h;
+
+ raw_mbox[0] = FC_NEW_CONFIG;
+ raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
+
+ if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: product info failed\n"));
+
+ pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
+ pinfo, pinfo_dma_h);
+
+ return -1;
+ }
+
+ /*
+ * Setup some parameters for host, as required by our caller
+ */
+ adapter->max_channel = pinfo->nchannels;
+
+ /*
+ * we will export all the logical drives on a single channel.
+ * Add 1 since inquires do not come for inititor ID
+ */
+ adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
+ adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
+
+ /*
+ * These are the maximum outstanding commands for the scsi-layer
+ */
+ adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
+
+ memset(adapter->fw_version, 0, VERSION_SIZE);
+ memset(adapter->bios_version, 0, VERSION_SIZE);
+
+ memcpy(adapter->fw_version, pinfo->fw_version, 4);
+ adapter->fw_version[4] = 0;
+
+ memcpy(adapter->bios_version, pinfo->bios_version, 4);
+ adapter->bios_version[4] = 0;
+
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: fw version:[%s] bios version:[%s]\n",
+ adapter->fw_version, adapter->bios_version));
+
+ pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
+ pinfo_dma_h);
+
+ return 0;
+}
+
+
+
+/**
+ * megaraid_mbox_extended_cdb - check for support for extended CDBs
+ * @adapter : soft state for the controller
+ *
+ * This routine check whether the controller in question supports extended
+ * ( > 10 bytes ) CDBs.
+ */
+static int
+megaraid_mbox_extended_cdb(adapter_t *adapter)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ int rval;
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
+ mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
+
+ memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+ raw_mbox[0] = MAIN_MISC_OPCODE;
+ raw_mbox[2] = SUPPORT_EXT_CDB;
+
+ /*
+ * Issue the command
+ */
+ rval = 0;
+ if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
+ rval = -1;
+ }
+
+ return rval;
+}
+
+
+/**
+ * megaraid_mbox_support_ha - Do we support clustering
+ * @adapter : soft state for the controller
+ * @init_id : ID of the initiator
+ *
+ * Determine if the firmware supports clustering and the ID of the initiator.
+ */
+static int
+megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ int rval;
+
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
+
+ mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
+
+ memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+ raw_mbox[0] = GET_TARGET_ID;
+
+ // Issue the command
+ *init_id = 7;
+ rval = -1;
+ if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
+
+ *init_id = *(uint8_t *)adapter->ibuf;
+
+ con_log(CL_ANN, (KERN_INFO
+ "megaraid: cluster firmware, initiator ID: %d\n",
+ *init_id));
+
+ rval = 0;
+ }
+
+ return rval;
+}
+
+
+/**
+ * megaraid_mbox_support_random_del - Do we support random deletion
+ * @adapter : soft state for the controller
+ *
+ * Determine if the firmware supports random deletion.
+ * Return: 1 is operation supported, 0 otherwise
+ */
+static int
+megaraid_mbox_support_random_del(adapter_t *adapter)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ int rval;
+
+ /*
+ * Newer firmware on Dell CERC expect a different
+ * random deletion handling, so disable it.
+ */
+ if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
+ adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
+ adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
+ adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
+ (adapter->fw_version[0] > '6' ||
+ (adapter->fw_version[0] == '6' &&
+ adapter->fw_version[2] > '6') ||
+ (adapter->fw_version[0] == '6'
+ && adapter->fw_version[2] == '6'
+ && adapter->fw_version[3] > '1'))) {
+ con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
+ return 0;
+ }
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
+
+ raw_mbox[0] = FC_DEL_LOGDRV;
+ raw_mbox[2] = OP_SUP_DEL_LOGDRV;
+
+ // Issue the command
+ rval = 0;
+ if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
+
+ con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
+
+ rval = 1;
+ }
+
+ return rval;
+}
+
+
+/**
+ * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
+ * @adapter : soft state for the controller
+ *
+ * Find out the maximum number of scatter-gather elements supported by the
+ * firmware.
+ */
+static int
+megaraid_mbox_get_max_sg(adapter_t *adapter)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ int nsg;
+
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
+
+ mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
+
+ memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+ raw_mbox[0] = MAIN_MISC_OPCODE;
+ raw_mbox[2] = GET_MAX_SG_SUPPORT;
+
+ // Issue the command
+ if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
+ nsg = *(uint8_t *)adapter->ibuf;
+ }
+ else {
+ nsg = MBOX_DEFAULT_SG_SIZE;
+ }
+
+ if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
+
+ return nsg;
+}
+
+
+/**
+ * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
+ * @adapter : soft state for the controller
+ *
+ * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
+ * can be exported as regular SCSI channels.
+ */
+static void
+megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
+
+ mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
+
+ memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+ raw_mbox[0] = CHNL_CLASS;
+ raw_mbox[2] = GET_CHNL_CLASS;
+
+ // Issue the command. If the command fails, all channels are RAID
+ // channels
+ raid_dev->channel_class = 0xFF;
+ if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
+ raid_dev->channel_class = *(uint8_t *)adapter->ibuf;
+ }
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_flush_cache - flush adapter and disks cache
+ * @adapter : soft state for the controller
+ *
+ * Flush adapter cache followed by disks cache.
+ */
+static void
+megaraid_mbox_flush_cache(adapter_t *adapter)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
+
+ raw_mbox[0] = FLUSH_ADAPTER;
+
+ if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
+ con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
+ }
+
+ raw_mbox[0] = FLUSH_SYSTEM;
+
+ if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
+ con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
+ }
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_fire_sync_cmd - fire the sync cmd
+ * @adapter : soft state for the controller
+ *
+ * Clears the pending cmds in FW and reinits its RAID structs.
+ */
+static int
+megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
+{
+ mbox_t *mbox;
+ uint8_t raw_mbox[sizeof(mbox_t)];
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mbox64_t *mbox64;
+ int status = 0;
+ int i;
+ uint32_t dword;
+
+ mbox = (mbox_t *)raw_mbox;
+
+ memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
+
+ raw_mbox[0] = 0xFF;
+
+ mbox64 = raid_dev->mbox64;
+ mbox = raid_dev->mbox;
+
+ /* Wait until mailbox is free */
+ if (megaraid_busywait_mbox(raid_dev) != 0) {
+ status = 1;
+ goto blocked_mailbox;
+ }
+
+ /* Copy mailbox data into host structure */
+ memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
+ mbox->cmdid = 0xFE;
+ mbox->busy = 1;
+ mbox->poll = 0;
+ mbox->ack = 0;
+ mbox->numstatus = 0;
+ mbox->status = 0;
+
+ wmb();
+ WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
+
+ /* Wait for maximum 1 min for status to post.
+ * If the Firmware SUPPORTS the ABOVE COMMAND,
+ * mbox->cmd will be set to 0
+ * else
+ * the firmware will reject the command with
+ * mbox->numstatus set to 1
+ */
+
+ i = 0;
+ status = 0;
+ while (!mbox->numstatus && mbox->cmd == 0xFF) {
+ rmb();
+ msleep(1);
+ i++;
+ if (i > 1000 * 60) {
+ status = 1;
+ break;
+ }
+ }
+ if (mbox->numstatus == 1)
+ status = 1; /*cmd not supported*/
+
+ /* Check for interrupt line */
+ dword = RDOUTDOOR(raid_dev);
+ WROUTDOOR(raid_dev, dword);
+ WRINDOOR(raid_dev,2);
+
+ return status;
+
+blocked_mailbox:
+ con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
+ return status;
+}
+
+/**
+ * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
+ * @adapter : controller's soft state
+ * @scb : SCB to be displayed
+ * @level : debug level for console print
+ *
+ * Diplay information about the given SCB iff the current debug level is
+ * verbose.
+ */
+static void
+megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
+{
+ mbox_ccb_t *ccb;
+ struct scsi_cmnd *scp;
+ mbox_t *mbox;
+ int level;
+ int i;
+
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ scp = scb->scp;
+ mbox = ccb->mbox;
+
+ level = CL_DLEVEL3;
+
+ con_log(level, (KERN_NOTICE
+ "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
+ mbox->cmd, scb->sno));
+
+ con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
+ mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
+ mbox->numsge));
+
+ if (!scp) return;
+
+ con_log(level, (KERN_NOTICE "scsi cmnd: "));
+
+ for (i = 0; i < scp->cmd_len; i++) {
+ con_log(level, ("%#2.02x ", scp->cmnd[i]));
+ }
+
+ con_log(level, ("\n"));
+
+ return;
+}
+
+
+/**
+ * megaraid_mbox_setup_device_map - manage device ids
+ * @adapter : Driver's soft state
+ *
+ * Manage the device ids to have an appropriate mapping between the kernel
+ * scsi addresses and megaraid scsi and logical drive addresses. We export
+ * scsi devices on their actual addresses, whereas the logical drives are
+ * exported on a virtual scsi channel.
+ */
+static void
+megaraid_mbox_setup_device_map(adapter_t *adapter)
+{
+ uint8_t c;
+ uint8_t t;
+
+ /*
+ * First fill the values on the logical drive channel
+ */
+ for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
+ adapter->device_ids[adapter->max_channel][t] =
+ (t < adapter->init_id) ? t : t - 1;
+
+ adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
+
+ /*
+ * Fill the values on the physical devices channels
+ */
+ for (c = 0; c < adapter->max_channel; c++)
+ for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
+ adapter->device_ids[c][t] = (c << 8) | t;
+}
+
+
+/*
+ * END: internal commands library
+ */
+
+/*
+ * START: Interface for the common management module
+ *
+ * This is the module, which interfaces with the common management module to
+ * provide support for ioctl and sysfs
+ */
+
+/**
+ * megaraid_cmm_register - register with the management module
+ * @adapter : HBA soft state
+ *
+ * Register with the management module, which allows applications to issue
+ * ioctl calls to the drivers. This interface is used by the management module
+ * to setup sysfs support as well.
+ */
+static int
+megaraid_cmm_register(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ mraid_mmadp_t adp;
+ scb_t *scb;
+ mbox_ccb_t *ccb;
+ int rval;
+ int i;
+
+ // Allocate memory for the base list of scb for management module.
+ adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
+
+ if (adapter->uscb_list == NULL) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+ return -1;
+ }
+
+
+ // Initialize the synchronization parameters for resources for
+ // commands for management module
+ INIT_LIST_HEAD(&adapter->uscb_pool);
+
+ spin_lock_init(USER_FREE_LIST_LOCK(adapter));
+
+
+
+ // link all the packets. Note, CCB for commands, coming from the
+ // commom management module, mailbox physical address are already
+ // setup by it. We just need placeholder for that in our local command
+ // control blocks
+ for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
+
+ scb = adapter->uscb_list + i;
+ ccb = raid_dev->uccb_list + i;
+
+ scb->ccb = (caddr_t)ccb;
+ ccb->mbox64 = raid_dev->umbox64 + i;
+ ccb->mbox = &ccb->mbox64->mbox32;
+ ccb->raw_mbox = (uint8_t *)ccb->mbox;
+
+ scb->gp = 0;
+
+ // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
+ // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
+ scb->sno = i + MBOX_MAX_SCSI_CMDS;
+
+ scb->scp = NULL;
+ scb->state = SCB_FREE;
+ scb->dma_direction = PCI_DMA_NONE;
+ scb->dma_type = MRAID_DMA_NONE;
+ scb->dev_channel = -1;
+ scb->dev_target = -1;
+
+ // put scb in the free pool
+ list_add_tail(&scb->list, &adapter->uscb_pool);
+ }
+
+ adp.unique_id = adapter->unique_id;
+ adp.drvr_type = DRVRTYPE_MBOX;
+ adp.drvr_data = (unsigned long)adapter;
+ adp.pdev = adapter->pdev;
+ adp.issue_uioc = megaraid_mbox_mm_handler;
+ adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
+ adp.max_kioc = MBOX_MAX_USER_CMDS;
+
+ if ((rval = mraid_mm_register_adp(&adp)) != 0) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mbox: did not register with CMM\n"));
+
+ kfree(adapter->uscb_list);
+ }
+
+ return rval;
+}
+
+
+/**
+ * megaraid_cmm_unregister - un-register with the management module
+ * @adapter : HBA soft state
+ *
+ * Un-register with the management module.
+ * FIXME: mgmt module must return failure for unregister if it has pending
+ * commands in LLD.
+ */
+static int
+megaraid_cmm_unregister(adapter_t *adapter)
+{
+ kfree(adapter->uscb_list);
+ mraid_mm_unregister_adp(adapter->unique_id);
+ return 0;
+}
+
+
+/**
+ * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
+ * @drvr_data : LLD specific data
+ * @kioc : CMM interface packet
+ * @action : command action
+ *
+ * This routine is invoked whenever the Common Management Module (CMM) has a
+ * command for us. The 'action' parameter specifies if this is a new command
+ * or otherwise.
+ */
+static int
+megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
+{
+ adapter_t *adapter;
+
+ if (action != IOCTL_ISSUE) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: unsupported management action:%#2x\n",
+ action));
+ return (-ENOTSUPP);
+ }
+
+ adapter = (adapter_t *)drvr_data;
+
+ // make sure this adapter is not being detached right now.
+ if (atomic_read(&adapter->being_detached)) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: reject management request, detaching\n"));
+ return (-ENODEV);
+ }
+
+ switch (kioc->opcode) {
+
+ case GET_ADAP_INFO:
+
+ kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *)
+ (unsigned long)kioc->buf_vaddr);
+
+ kioc->done(kioc);
+
+ return kioc->status;
+
+ case MBOX_CMD:
+
+ return megaraid_mbox_mm_command(adapter, kioc);
+
+ default:
+ kioc->status = (-EINVAL);
+ kioc->done(kioc);
+ return (-EINVAL);
+ }
+
+ return 0; // not reached
+}
+
+/**
+ * megaraid_mbox_mm_command - issues commands routed through CMM
+ * @adapter : HBA soft state
+ * @kioc : management command packet
+ *
+ * Issues commands, which are routed through the management module.
+ */
+static int
+megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
+{
+ struct list_head *head = &adapter->uscb_pool;
+ mbox64_t *mbox64;
+ uint8_t *raw_mbox;
+ scb_t *scb;
+ mbox_ccb_t *ccb;
+ unsigned long flags;
+
+ // detach one scb from free pool
+ spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
+
+ if (list_empty(head)) { // should never happen because of CMM
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid mbox: bug in cmm handler, lost resources\n"));
+
+ spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
+
+ return (-EINVAL);
+ }
+
+ scb = list_entry(head->next, scb_t, list);
+ list_del_init(&scb->list);
+
+ spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
+
+ scb->state = SCB_ACTIVE;
+ scb->dma_type = MRAID_DMA_NONE;
+ scb->dma_direction = PCI_DMA_NONE;
+
+ ccb = (mbox_ccb_t *)scb->ccb;
+ mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
+ raw_mbox = (uint8_t *)&mbox64->mbox32;
+
+ memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
+
+ scb->gp = (unsigned long)kioc;
+
+ /*
+ * If it is a logdrv random delete operation, we have to wait till
+ * there are no outstanding cmds at the fw and then issue it directly
+ */
+ if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
+
+ if (wait_till_fw_empty(adapter)) {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid mbox: LD delete, timed out\n"));
+
+ kioc->status = -ETIME;
+
+ scb->status = -1;
+
+ megaraid_mbox_mm_done(adapter, scb);
+
+ return (-ETIME);
+ }
+
+ INIT_LIST_HEAD(&scb->list);
+
+ scb->state = SCB_ISSUED;
+ if (mbox_post_cmd(adapter, scb) != 0) {
+
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid mbox: LD delete, mailbox busy\n"));
+
+ kioc->status = -EBUSY;
+
+ scb->status = -1;
+
+ megaraid_mbox_mm_done(adapter, scb);
+
+ return (-EBUSY);
+ }
+
+ return 0;
+ }
+
+ // put the command on the pending list and execute
+ megaraid_mbox_runpendq(adapter, scb);
+
+ return 0;
+}
+
+
+static int
+wait_till_fw_empty(adapter_t *adapter)
+{
+ unsigned long flags = 0;
+ int i;
+
+
+ /*
+ * Set the quiescent flag to stop issuing cmds to FW.
+ */
+ spin_lock_irqsave(&adapter->lock, flags);
+ adapter->quiescent++;
+ spin_unlock_irqrestore(&adapter->lock, flags);
+
+ /*
+ * Wait till there are no more cmds outstanding at FW. Try for at most
+ * 60 seconds
+ */
+ for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
+ con_log(CL_DLEVEL1, (KERN_INFO
+ "megaraid: FW has %d pending commands\n",
+ adapter->outstanding_cmds));
+
+ msleep(1000);
+ }
+
+ return adapter->outstanding_cmds;
+}
+
+
+/**
+ * megaraid_mbox_mm_done - callback for CMM commands
+ * @adapter : HBA soft state
+ * @scb : completed command
+ *
+ * Callback routine for internal commands originated from the management
+ * module.
+ */
+static void
+megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
+{
+ uioc_t *kioc;
+ mbox64_t *mbox64;
+ uint8_t *raw_mbox;
+ unsigned long flags;
+
+ kioc = (uioc_t *)scb->gp;
+ mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
+ mbox64->mbox32.status = scb->status;
+ raw_mbox = (uint8_t *)&mbox64->mbox32;
+
+
+ // put scb in the free pool
+ scb->state = SCB_FREE;
+ scb->scp = NULL;
+
+ spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
+
+ list_add(&scb->list, &adapter->uscb_pool);
+
+ spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
+
+ // if a delete logical drive operation succeeded, restart the
+ // controller
+ if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
+
+ adapter->quiescent--;
+
+ megaraid_mbox_runpendq(adapter, NULL);
+ }
+
+ kioc->done(kioc);
+
+ return;
+}
+
+
+/**
+ * gather_hbainfo - HBA characteristics for the applications
+ * @adapter : HBA soft state
+ * @hinfo : pointer to the caller's host info strucuture
+ */
+static int
+gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
+{
+ uint8_t dmajor;
+
+ dmajor = megaraid_mbox_version[0];
+
+ hinfo->pci_vendor_id = adapter->pdev->vendor;
+ hinfo->pci_device_id = adapter->pdev->device;
+ hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
+ hinfo->subsys_device_id = adapter->pdev->subsystem_device;
+
+ hinfo->pci_bus = adapter->pdev->bus->number;
+ hinfo->pci_dev_fn = adapter->pdev->devfn;
+ hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn);
+ hinfo->irq = adapter->host->irq;
+ hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport;
+
+ hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
+ hinfo->host_no = adapter->host->host_no;
+
+ return 0;
+}
+
+/*
+ * END: Interface for the common management module
+ */
+
+
+
+/**
+ * megaraid_sysfs_alloc_resources - allocate sysfs related resources
+ * @adapter : controller's soft state
+ *
+ * Allocate packets required to issue FW calls whenever the sysfs attributes
+ * are read. These attributes would require up-to-date information from the
+ * FW. Also set up resources for mutual exclusion to share these resources and
+ * the wait queue.
+ *
+ * Return 0 on success.
+ * Return -ERROR_CODE on failure.
+ */
+static int
+megaraid_sysfs_alloc_resources(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ int rval = 0;
+
+ raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
+
+ raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
+
+ raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
+ PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
+
+ if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
+ !raid_dev->sysfs_buffer) {
+
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: out of memory, %s %d\n", __func__,
+ __LINE__));
+
+ rval = -ENOMEM;
+
+ megaraid_sysfs_free_resources(adapter);
+ }
+
+ mutex_init(&raid_dev->sysfs_mtx);
+
+ init_waitqueue_head(&raid_dev->sysfs_wait_q);
+
+ return rval;
+}
+
+
+/**
+ * megaraid_sysfs_free_resources - free sysfs related resources
+ * @adapter : controller's soft state
+ *
+ * Free packets allocated for sysfs FW commands
+ */
+static void
+megaraid_sysfs_free_resources(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+
+ kfree(raid_dev->sysfs_uioc);
+ kfree(raid_dev->sysfs_mbox64);
+
+ if (raid_dev->sysfs_buffer) {
+ pci_free_consistent(adapter->pdev, PAGE_SIZE,
+ raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
+ }
+}
+
+
+/**
+ * megaraid_sysfs_get_ldmap_done - callback for get ldmap
+ * @uioc : completed packet
+ *
+ * Callback routine called in the ISR/tasklet context for get ldmap call
+ */
+static void
+megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
+{
+ adapter_t *adapter = (adapter_t *)uioc->buf_vaddr;
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+
+ uioc->status = 0;
+
+ wake_up(&raid_dev->sysfs_wait_q);
+}
+
+
+/**
+ * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
+ * @data : timed out packet
+ *
+ * Timeout routine to recover and return to application, in case the adapter
+ * has stopped responding. A timeout of 60 seconds for this command seems like
+ * a good value.
+ */
+static void
+megaraid_sysfs_get_ldmap_timeout(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
+ * @adapter : controller's soft state
+ *
+ * This routine will be called whenever user reads the logical drive
+ * attributes, go get the current logical drive mapping table from the
+ * firmware. We use the management API's to issue commands to the controller.
+ *
+ * NOTE: The commands issuance functionality is not generalized and
+ * implemented in context of "get ld map" command only. If required, the
+ * command issuance logical can be trivially pulled out and implemented as a
+ * standalone library. For now, this should suffice since there is no other
+ * user of this interface.
+ *
+ * Return 0 on success.
+ * Return -1 on failure.
+ */
+static int
+megaraid_sysfs_get_ldmap(adapter_t *adapter)
+{
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ uioc_t *uioc;
+ mbox64_t *mbox64;
+ mbox_t *mbox;
+ char *raw_mbox;
+ struct 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
+ */
+ mutex_lock(&raid_dev->sysfs_mtx);
+
+ uioc = raid_dev->sysfs_uioc;
+ mbox64 = raid_dev->sysfs_mbox64;
+ ldmap = raid_dev->sysfs_buffer;
+
+ memset(uioc, 0, sizeof(uioc_t));
+ memset(mbox64, 0, sizeof(mbox64_t));
+ memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
+
+ mbox = &mbox64->mbox32;
+ raw_mbox = (char *)mbox;
+ uioc->cmdbuf = (uint64_t)(unsigned long)mbox64;
+ uioc->buf_vaddr = (caddr_t)adapter;
+ uioc->status = -ENODATA;
+ uioc->done = megaraid_sysfs_get_ldmap_done;
+
+ /*
+ * Prepare the mailbox packet to get the current logical drive mapping
+ * table
+ */
+ mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
+
+ raw_mbox[0] = FC_DEL_LOGDRV;
+ raw_mbox[2] = OP_GET_LDID_MAP;
+
+ /*
+ * Setup a timer to recover from a non-responding controller
+ */
+ 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);
+
+ mutex_unlock(&raid_dev->sysfs_mtx);
+
+ return rval;
+}
+
+
+/**
+ * megaraid_sysfs_show_app_hndl - display application handle for this adapter
+ * @cdev : class device object representation for the host
+ * @buf : buffer to send data to
+ *
+ * Display the handle used by the applications while executing management
+ * tasks on the adapter. We invoke a management module API to get the adapter
+ * handle, since we do not interface with applications directly.
+ */
+static ssize_t
+megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
+ uint32_t app_hndl;
+
+ app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
+
+ return snprintf(buf, 8, "%u\n", app_hndl);
+}
+
+
+/**
+ * megaraid_sysfs_show_ldnum - display the logical drive number for this device
+ * @dev : device object representation for the scsi device
+ * @attr : device attribute to show
+ * @buf : buffer to send data to
+ *
+ * Display the logical drive number for the device in question, if it a valid
+ * logical drive. For physical devices, "-1" is returned.
+ *
+ * The logical drive number is displayed in following format:
+ *
+ * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
+ *
+ * <int> <int> <int> <int>
+ */
+static ssize_t
+megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
+ mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+ int scsi_id = -1;
+ int logical_drv = -1;
+ int ldid_map = -1;
+ uint32_t app_hndl = 0;
+ int mapped_sdev_id;
+ int rval;
+ int i;
+
+ if (raid_dev->random_del_supported &&
+ MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
+
+ rval = megaraid_sysfs_get_ldmap(adapter);
+ if (rval == 0) {
+
+ for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
+
+ mapped_sdev_id = sdev->id;
+
+ if (sdev->id > adapter->init_id) {
+ mapped_sdev_id -= 1;
+ }
+
+ if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
+
+ scsi_id = sdev->id;
+
+ logical_drv = i;
+
+ ldid_map = raid_dev->curr_ldmap[i];
+
+ app_hndl = mraid_mm_adapter_app_handle(
+ adapter->unique_id);
+
+ break;
+ }
+ }
+ }
+ else {
+ con_log(CL_ANN, (KERN_NOTICE
+ "megaraid: sysfs get ld map failed: %x\n",
+ rval));
+ }
+ }
+
+ return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
+ ldid_map, app_hndl);
+}
+
+
+/*
+ * END: Mailbox Low Level Driver
+ */
+module_init(megaraid_init);
+module_exit(megaraid_exit);
+
+/* vim: set ts=8 sw=8 tw=78 ai si: */
Code Review / kvmfornfv.git / blobdiff