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linux-next/drivers/scsi/megaraid/megaraid_mbox.c
Jeff Garzik f281233d3e SCSI host lock push-down 
Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-16 13:33:23 -08:00

4180 lines
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/*
*
* 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/ChangeLog.megaraid
*/
#include <linux/slab.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 = __devexit_p(megaraid_detach_one),
.shutdown = megaraid_mbox_shutdown,
};
// definitions for the device attributes for exporting logical drive number
// for a scsi address (Host, Channel, Id, Lun)
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,
};
/**
* megaraid_change_queue_depth - Change the device's queue depth
* @sdev: scsi device struct
* @qdepth: depth to set
* @reason: calling context
*
* Return value:
* actual depth set
*/
static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth,
int reason)
{
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
if (qdepth > MBOX_MAX_SCSI_CMDS)
qdepth = MBOX_MAX_SCSI_CMDS;
scsi_adjust_queue_depth(sdev, 0, qdepth);
return sdev->queue_depth;
}
/*
* 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 = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING,
.sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs,
};
/**
* megaraid_init - module load hook
*
* We register ourselves as hotplug enabled module and let PCI subsystem
* discover our 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 __devinit
megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
adapter_t *adapter;
// detected a new controller
con_log(CL_ANN, (KERN_INFO
"megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device));
con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
if (pci_enable_device(pdev)) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: pci_enable_device failed\n"));
return -ENODEV;
}
// Enable bus-mastering on this controller
pci_set_master(pdev);
// Allocate the per driver initialization structure
adapter = 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:
pci_set_drvdata(pdev, NULL);
megaraid_cmm_unregister(adapter);
out_fini_mbox:
megaraid_fini_mbox(adapter);
out_free_adapter:
kfree(adapter);
out_probe_one:
pci_disable_device(pdev);
return -ENODEV;
}
/**
* megaraid_detach_one - release framework resources and call LLD release routine
* @pdev : handle for our PCI cofiguration space
*
* This routine is called during driver unload. We free all the allocated
* resources and call the corresponding LLD so that it can also release all
* its resources.
*
* This routine is also called from the PCI hotplug system.
*/
static void
megaraid_detach_one(struct pci_dev *pdev)
{
adapter_t *adapter;
struct Scsi_Host *host;
// Start a rollback on this adapter
adapter = pci_get_drvdata(pdev);
if (!adapter) {
con_log(CL_ANN, (KERN_CRIT
"megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device));
return;
}
else {
con_log(CL_ANN, (KERN_NOTICE
"megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device));
}
host = adapter->host;
// do not allow any more requests from the management module for this
// adapter.
// FIXME: How do we account for the request which might still be
// pending with us?
atomic_set(&adapter->being_detached, 1);
// detach from the IO sub-system
megaraid_io_detach(adapter);
// reset the device state in the PCI structure. We check this
// condition when we enter here. If the device state is NULL,
// that would mean the device has already been removed
pci_set_drvdata(pdev, NULL);
// Unregister from common management module
//
// FIXME: this must return success or failure for conditions if there
// is a command pending with LLD or not.
megaraid_cmm_unregister(adapter);
// finalize the mailbox based controller and release all resources
megaraid_fini_mbox(adapter);
kfree(adapter);
scsi_host_put(host);
pci_disable_device(pdev);
return;
}
/**
* megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
* @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 __devinit
megaraid_init_mbox(adapter_t *adapter)
{
struct pci_dev *pdev;
mraid_device_t *raid_dev;
int i;
uint32_t magic64;
adapter->ito = MBOX_TIMEOUT;
pdev = adapter->pdev;
/*
* Allocate and initialize the init data structure for mailbox
* controllers
*/
raid_dev = 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 regsitered
* with the FW. Allocate memory for all commands as well.
* This is our big allocator.
*/
static int
megaraid_alloc_cmd_packets(adapter_t *adapter)
{
mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
struct pci_dev *pdev;
unsigned long align;
scb_t *scb;
mbox_ccb_t *ccb;
struct mraid_pci_blk *epthru_pci_blk;
struct mraid_pci_blk *sg_pci_blk;
struct mraid_pci_blk *mbox_pci_blk;
int i;
pdev = adapter->pdev;
/*
* Setup the mailbox
* Allocate the common 16-byte aligned memory for the handshake
* mailbox.
*/
raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
if (!raid_dev->una_mbox64) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: out of memory, %s %d\n", __func__,
__LINE__));
return -1;
}
memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
/*
* Align the mailbox at 16-byte boundary
*/
raid_dev->mbox = &raid_dev->una_mbox64->mbox32;
raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
(~0UL ^ 0xFUL));
raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
align = ((void *)raid_dev->mbox -
((void *)&raid_dev->una_mbox64->mbox32));
raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
align;
// Allocate memory for commands issued internally
adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
&adapter->ibuf_dma_h);
if (!adapter->ibuf) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: out of memory, %s %d\n", __func__,
__LINE__));
goto out_free_common_mbox;
}
memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
// Allocate memory for our SCSI Command Blocks and their associated
// memory
/*
* Allocate memory for the base list of scb. Later allocate memory for
* CCBs and embedded components of each CCB and point the pointers in
* scb to the allocated components
* NOTE: The code to allocate SCB will be duplicated in all the LLD
* since the calling routine does not yet know the number of available
* commands.
*/
adapter->kscb_list = 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 rountine prepares
* commands for devices which can take extended CDBs (>10 bytes).
*/
static void
megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
struct scsi_cmnd *scp)
{
mbox_ccb_t *ccb;
mraid_epassthru_t *epthru;
uint8_t channel;
uint8_t target;
ccb = (mbox_ccb_t *)scb->ccb;
epthru = ccb->epthru;
channel = scb->dev_channel;
target = scb->dev_target;
// 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
epthru->timeout = 4;
epthru->ars = 1;
epthru->islogical = 0;
epthru->channel = 0;
epthru->target = (channel << 4) | target;
epthru->logdrv = SCP2LUN(scp);
epthru->reqsenselen = 14;
epthru->cdblen = scp->cmd_len;
memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
if (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 %lx[%x] completed\n",
scp->serial_number, scb->sno));
}
/*
* If the inquiry came of a disk drive which is not part of
* any RAID array, expose it to the kernel. For this to be
* enabled, user must set the "megaraid_expose_unconf_disks"
* flag to 1 by specifying it on module parameter list.
* This would enable data migration off drives from other
* configurations.
*/
islogical = MRAID_IS_LOGICAL(adapter, scp);
if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
&& IS_RAID_CH(raid_dev, scb->dev_channel)) {
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-%ld cmd=%x <c=%d t=%d l=%d>\n",
scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
SCP2TARGET(scp), SCP2LUN(scp)));
// If FW has stopped responding, simply return failure
if (raid_dev->hw_error) {
con_log(CL_ANN, (KERN_NOTICE
"megaraid: hw error, not aborting\n"));
return FAILED;
}
// There might a race here, where the command was completed by the
// firmware and now it is on the completed list. Before we could
// complete the command to the kernel in dpc, the abort came.
// Find out if this is the case to avoid the race.
scb = NULL;
spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
if (scb->scp == scp) { // Found command
list_del_init(&scb->list); // from completed list
con_log(CL_ANN, (KERN_WARNING
"megaraid: %ld:%d[%d:%d], abort from completed list\n",
scp->serial_number, scb->sno,
scb->dev_channel, scb->dev_target));
scp->result = (DID_ABORT << 16);
scp->scsi_done(scp);
megaraid_dealloc_scb(adapter, scb);
spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
flags);
return SUCCESS;
}
}
spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
// Find out if this command is still on the pending list. If it is and
// was never issued, abort and return success. If the command is owned
// by the firmware, we must wait for it to complete by the FW.
spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
if (scb->scp == scp) { // Found command
list_del_init(&scb->list); // from pending list
ASSERT(!(scb->state & SCB_ISSUED));
con_log(CL_ANN, (KERN_WARNING
"megaraid abort: %ld[%d:%d], driver owner\n",
scp->serial_number, scb->dev_channel,
scb->dev_target));
scp->result = (DID_ABORT << 16);
scp->scsi_done(scp);
megaraid_dealloc_scb(adapter, scb);
spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
flags);
return SUCCESS;
}
}
spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
// Check do we even own this command, in which case this would be
// owned by the firmware. The only way to locate the FW scb is to
// traverse through the list of all SCB, since driver does not
// maintain these SCBs on any list
found = 0;
spin_lock_irq(&adapter->lock);
for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
scb = adapter->kscb_list + i;
if (scb->scp == scp) {
found = 1;
if (!(scb->state & SCB_ISSUED)) {
con_log(CL_ANN, (KERN_WARNING
"megaraid abort: %ld%d[%d:%d], invalid state\n",
scp->serial_number, scb->sno, scb->dev_channel,
scb->dev_target));
BUG();
}
else {
con_log(CL_ANN, (KERN_WARNING
"megaraid abort: %ld:%d[%d:%d], fw owner\n",
scp->serial_number, scb->sno, scb->dev_channel,
scb->dev_target));
}
}
}
spin_unlock_irq(&adapter->lock);
if (!found) {
con_log(CL_ANN, (KERN_WARNING
"megaraid abort: scsi cmd:%ld, do now own\n",
scp->serial_number));
// FIXME: Should there be a callback for this command?
return SUCCESS;
}
// We cannot actually abort a command owned by firmware, return
// failure and wait for reset. In host reset handler, we will find out
// if the HBA is still live
return FAILED;
}
/**
* megaraid_reset_handler - device reset hadler for mailbox based driver
* @scp : reference command
*
* Reset handler for the mailbox based controller. First try to find out if
* the FW is still live, in which case the outstanding commands counter mut go
* down to 0. If that happens, also issue the reservation reset command to
* relinquish (possible) reservations on the logical drives connected to this
* host.
**/
static int
megaraid_reset_handler(struct scsi_cmnd *scp)
{
adapter_t *adapter;
scb_t *scb;
scb_t *tmp;
mraid_device_t *raid_dev;
unsigned long flags;
uint8_t raw_mbox[sizeof(mbox_t)];
int rval;
int recovery_window;
int recovering;
int i;
uioc_t *kioc;
adapter = SCP2ADAPTER(scp);
raid_dev = ADAP2RAIDDEV(adapter);
// return failure if adapter is not responding
if (raid_dev->hw_error) {
con_log(CL_ANN, (KERN_NOTICE
"megaraid: hw error, cannot reset\n"));
return FAILED;
}
// Under exceptional conditions, FW can take up to 3 minutes to
// complete command processing. Wait for additional 2 minutes for the
// pending commands counter to go down to 0. If it doesn't, let the
// controller be marked offline
// Also, reset all the commands currently owned by the driver
spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
list_del_init(&scb->list); // from pending list
if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: IOCTL packet with %d[%d:%d] being reset\n",
scb->sno, scb->dev_channel, scb->dev_target));
scb->status = -1;
kioc = (uioc_t *)scb->gp;
kioc->status = -EFAULT;
megaraid_mbox_mm_done(adapter, scb);
} else {
if (scb->scp == scp) { // Found command
con_log(CL_ANN, (KERN_WARNING
"megaraid: %ld:%d[%d:%d], reset from pending list\n",
scp->serial_number, scb->sno,
scb->dev_channel, scb->dev_target));
} else {
con_log(CL_ANN, (KERN_WARNING
"megaraid: IO packet with %d[%d:%d] being reset\n",
scb->sno, scb->dev_channel, scb->dev_target));
}
scb->scp->result = (DID_RESET << 16);
scb->scp->scsi_done(scb->scp);
megaraid_dealloc_scb(adapter, scb);
}
}
spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
if (adapter->outstanding_cmds) {
con_log(CL_ANN, (KERN_NOTICE
"megaraid: %d outstanding commands. Max wait %d sec\n",
adapter->outstanding_cmds,
(MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
}
recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
recovering = adapter->outstanding_cmds;
for (i = 0; i < recovery_window; i++) {
megaraid_ack_sequence(adapter);
// print a message once every 5 seconds only
if (!(i % 5)) {
con_log(CL_ANN, (
"megaraid mbox: Wait for %d commands to complete:%d\n",
adapter->outstanding_cmds,
(MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
}
// bailout if no recovery happended in reset time
if (adapter->outstanding_cmds == 0) {
break;
}
msleep(1000);
}
spin_lock(&adapter->lock);
// If still outstanding commands, bail out
if (adapter->outstanding_cmds) {
con_log(CL_ANN, (KERN_WARNING
"megaraid mbox: critical hardware error!\n"));
raid_dev->hw_error = 1;
rval = FAILED;
goto out;
}
else {
con_log(CL_ANN, (KERN_NOTICE
"megaraid mbox: reset sequence completed 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_irq(&adapter->lock);
return rval;
}
/*
* START: internal commands library
*
* This section of the driver has the common routine used by the driver and
* also has all the FW routines
*/
/**
* mbox_post_sync_cmd() - blocking command to the mailbox based controllers
* @adapter : controller's soft state
* @raw_mbox : the mailbox
*
* Issue a scb in synchronous and non-interrupt mode for mailbox based
* controllers.
*/
static int
mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
{
mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
mbox64_t *mbox64;
mbox_t *mbox;
uint8_t status;
int i;
mbox64 = raid_dev->mbox64;
mbox = raid_dev->mbox;
/*
* Wait until mailbox is free
*/
if (megaraid_busywait_mbox(raid_dev) != 0)
goto blocked_mailbox;
/*
* Copy mailbox data into host structure
*/
memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
mbox->cmdid = 0xFE;
mbox->busy = 1;
mbox->poll = 0;
mbox->ack = 0;
mbox->numstatus = 0xFF;
mbox->status = 0xFF;
wmb();
WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
// wait for maximum 1 second for status to post. If the status is not
// available within 1 second, assume FW is initializing and wait
// for an extended amount of time
if (mbox->numstatus == 0xFF) { // status not yet available
udelay(25);
for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
rmb();
msleep(1);
}
if (i == 1000) {
con_log(CL_ANN, (KERN_NOTICE
"megaraid mailbox: wait for FW to boot "));
for (i = 0; (mbox->numstatus == 0xFF) &&
(i < MBOX_RESET_WAIT); i++) {
rmb();
con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
MBOX_RESET_WAIT - i));
msleep(1000);
}
if (i == MBOX_RESET_WAIT) {
con_log(CL_ANN, (
"\nmegaraid mailbox: status not available\n"));
return -1;
}
con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
}
}
// wait for maximum 1 second for poll semaphore
if (mbox->poll != 0x77) {
udelay(25);
for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
rmb();
msleep(1);
}
if (i == 1000) {
con_log(CL_ANN, (KERN_WARNING
"megaraid mailbox: could not get poll semaphore\n"));
return -1;
}
}
WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
wmb();
// wait for maximum 1 second for acknowledgement
if (RDINDOOR(raid_dev) & 0x2) {
udelay(25);
for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
rmb();
msleep(1);
}
if (i == 1000) {
con_log(CL_ANN, (KERN_WARNING
"megaraid mailbox: could not acknowledge\n"));
return -1;
}
}
mbox->poll = 0;
mbox->ack = 0x77;
status = mbox->status;
// invalidate the completed command id array. After command
// completion, firmware would write the valid id.
mbox->numstatus = 0xFF;
mbox->status = 0xFF;
for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
mbox->completed[i] = 0xFF;
}
return status;
blocked_mailbox:
con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
return -1;
}
/**
* mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
* @adapter : controller's soft state
* @raw_mbox : the mailbox
*
* Issue a scb in synchronous and non-interrupt mode for mailbox based
* controllers. This is a faster version of the synchronous command and
* therefore can be called in interrupt-context as well.
*/
static int
mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
{
mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
mbox_t *mbox;
long i;
mbox = raid_dev->mbox;
// return immediately if the mailbox is busy
if (mbox->busy) return -1;
// Copy mailbox data into host structure
memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
mbox->cmdid = 0xFE;
mbox->busy = 1;
mbox->poll = 0;
mbox->ack = 0;
mbox->numstatus = 0xFF;
mbox->status = 0xFF;
wmb();
WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
if (mbox->numstatus != 0xFF) break;
rmb();
udelay(MBOX_SYNC_DELAY_200);
}
if (i == MBOX_SYNC_WAIT_CNT) {
// We may need to re-calibrate the counter
con_log(CL_ANN, (KERN_CRIT
"megaraid: fast sync command timed out\n"));
}
WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
wmb();
return mbox->status;
}
/**
* megaraid_busywait_mbox() - Wait until the controller's mailbox is available
* @raid_dev : RAID device (HBA) soft state
*
* Wait until the controller's mailbox is available to accept more commands.
* Wait for at most 1 second.
*/
static int
megaraid_busywait_mbox(mraid_device_t *raid_dev)
{
mbox_t *mbox = raid_dev->mbox;
int i = 0;
if (mbox->busy) {
udelay(25);
for (i = 0; mbox->busy && i < 1000; i++)
msleep(1);
}
if (i < 1000) return 0;
else return -1;
}
/**
* megaraid_mbox_product_info - some static information about the controller
* @adapter : our soft state
*
* Issue commands to the controller to grab some parameters required by our
* caller.
*/
static int
megaraid_mbox_product_info(adapter_t *adapter)
{
mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
mbox_t *mbox;
uint8_t raw_mbox[sizeof(mbox_t)];
mraid_pinfo_t *pinfo;
dma_addr_t pinfo_dma_h;
mraid_inquiry3_t *mraid_inq3;
int i;
memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
mbox = (mbox_t *)raw_mbox;
/*
* Issue an ENQUIRY3 command to find out certain adapter parameters,
* e.g., max channels, max commands etc.
*/
pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
&pinfo_dma_h);
if (pinfo == NULL) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: out of memory, %s %d\n", __func__,
__LINE__));
return -1;
}
memset(pinfo, 0, sizeof(mraid_pinfo_t));
mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
raw_mbox[0] = FC_NEW_CONFIG;
raw_mbox[2] = NC_SUBOP_ENQUIRY3;
raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
// Issue the command
if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
pinfo, pinfo_dma_h);
return -1;
}
/*
* Collect information about state of each physical drive
* attached to the controller. We will expose all the disks
* which are not part of RAID
*/
mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
}
/*
* Get product info for information like number of channels,
* maximum commands supported.
*/
memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
mbox->xferaddr = (uint32_t)pinfo_dma_h;
raw_mbox[0] = FC_NEW_CONFIG;
raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
con_log(CL_ANN, (KERN_WARNING
"megaraid: product info failed\n"));
pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
pinfo, pinfo_dma_h);
return -1;
}
/*
* Setup some parameters for host, as required by our caller
*/
adapter->max_channel = pinfo->nchannels;
/*
* we will export all the logical drives on a single channel.
* Add 1 since inquires do not come for inititor ID
*/
adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1;
adapter->max_lun = 8; // up to 8 LUNs for non-disk devices
/*
* These are the maximum outstanding commands for the scsi-layer
*/
adapter->max_cmds = MBOX_MAX_SCSI_CMDS;
memset(adapter->fw_version, 0, VERSION_SIZE);
memset(adapter->bios_version, 0, VERSION_SIZE);
memcpy(adapter->fw_version, pinfo->fw_version, 4);
adapter->fw_version[4] = 0;
memcpy(adapter->bios_version, pinfo->bios_version, 4);
adapter->bios_version[4] = 0;
con_log(CL_ANN, (KERN_NOTICE
"megaraid: fw version:[%s] bios version:[%s]\n",
adapter->fw_version, adapter->bios_version));
pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
pinfo_dma_h);
return 0;
}
/**
* megaraid_mbox_extended_cdb - check for support for extended CDBs
* @adapter : soft state for the controller
*
* This routine check whether the controller in question supports extended
* ( > 10 bytes ) CDBs.
*/
static int
megaraid_mbox_extended_cdb(adapter_t *adapter)
{
mbox_t *mbox;
uint8_t raw_mbox[sizeof(mbox_t)];
int rval;
mbox = (mbox_t *)raw_mbox;
memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
raw_mbox[0] = MAIN_MISC_OPCODE;
raw_mbox[2] = SUPPORT_EXT_CDB;
/*
* Issue the command
*/
rval = 0;
if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
rval = -1;
}
return rval;
}
/**
* megaraid_mbox_support_ha - Do we support clustering
* @adapter : soft state for the controller
* @init_id : ID of the initiator
*
* Determine if the firmware supports clustering and the ID of the initiator.
*/
static int
megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
{
mbox_t *mbox;
uint8_t raw_mbox[sizeof(mbox_t)];
int rval;
mbox = (mbox_t *)raw_mbox;
memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
raw_mbox[0] = GET_TARGET_ID;
// Issue the command
*init_id = 7;
rval = -1;
if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
*init_id = *(uint8_t *)adapter->ibuf;
con_log(CL_ANN, (KERN_INFO
"megaraid: cluster firmware, initiator ID: %d\n",
*init_id));
rval = 0;
}
return rval;
}
/**
* megaraid_mbox_support_random_del - Do we support random deletion
* @adapter : soft state for the controller
*
* Determine if the firmware supports random deletion.
* Return: 1 is operation supported, 0 otherwise
*/
static int
megaraid_mbox_support_random_del(adapter_t *adapter)
{
mbox_t *mbox;
uint8_t raw_mbox[sizeof(mbox_t)];
int rval;
/*
* 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
*
* Manange the device ids to have an appropraite mapping between the kernel
* scsi addresses and megaraid scsi and logical drive addresses. We export
* scsi devices on their actual addresses, whereas the logical drives are
* exported on a virtual scsi channel.
*/
static void
megaraid_mbox_setup_device_map(adapter_t *adapter)
{
uint8_t c;
uint8_t t;
/*
* First fill the values on the logical drive channel
*/
for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
adapter->device_ids[adapter->max_channel][t] =
(t < adapter->init_id) ? t : t - 1;
adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
/*
* Fill the values on the physical devices channels
*/
for (c = 0; c < adapter->max_channel; c++)
for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
adapter->device_ids[c][t] = (c << 8) | t;
}
/*
* END: internal commands library
*/
/*
* START: Interface for the common management module
*
* This is the module, which interfaces with the common 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 libary. 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: */
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