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DAC960.c
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/*
Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
Portions Copyright 2002 by Mylex (An IBM Business Unit)
This program is free software; you may redistribute and/or modify it under
the terms of the GNU General Public License Version 2 as published by the
Free Software Foundation.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for complete details.
*/
#define DAC960_DriverVersion "2.5.49"
#define DAC960_DriverDate "21 Aug 2007"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/blkdev.h>
#include <linux/bio.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/genhd.h>
#include <linux/hdreg.h>
#include <linux/blkpg.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/random.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include "DAC960.h"
#define DAC960_GAM_MINOR 252
static DAC960_Controller_T *DAC960_Controllers[DAC960_MaxControllers];
static int DAC960_ControllerCount;
static struct proc_dir_entry *DAC960_ProcDirectoryEntry;
static long disk_size(DAC960_Controller_T *p, int drive_nr)
{
if (p->FirmwareType == DAC960_V1_Controller) {
if (drive_nr >= p->LogicalDriveCount)
return 0;
return p->V1.LogicalDriveInformation[drive_nr].
LogicalDriveSize;
} else {
DAC960_V2_LogicalDeviceInfo_T *i =
p->V2.LogicalDeviceInformation[drive_nr];
if (i == NULL)
return 0;
return i->ConfigurableDeviceSize;
}
}
static int DAC960_open(struct inode *inode, struct file *file)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
DAC960_Controller_T *p = disk->queue->queuedata;
int drive_nr = (long)disk->private_data;
if (p->FirmwareType == DAC960_V1_Controller) {
if (p->V1.LogicalDriveInformation[drive_nr].
LogicalDriveState == DAC960_V1_LogicalDrive_Offline)
return -ENXIO;
} else {
DAC960_V2_LogicalDeviceInfo_T *i =
p->V2.LogicalDeviceInformation[drive_nr];
if (!i || i->LogicalDeviceState == DAC960_V2_LogicalDevice_Offline)
return -ENXIO;
}
check_disk_change(inode->i_bdev);
if (!get_capacity(p->disks[drive_nr]))
return -ENXIO;
return 0;
}
static int DAC960_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
struct gendisk *disk = bdev->bd_disk;
DAC960_Controller_T *p = disk->queue->queuedata;
int drive_nr = (long)disk->private_data;
if (p->FirmwareType == DAC960_V1_Controller) {
geo->heads = p->V1.GeometryTranslationHeads;
geo->sectors = p->V1.GeometryTranslationSectors;
geo->cylinders = p->V1.LogicalDriveInformation[drive_nr].
LogicalDriveSize / (geo->heads * geo->sectors);
} else {
DAC960_V2_LogicalDeviceInfo_T *i =
p->V2.LogicalDeviceInformation[drive_nr];
switch (i->DriveGeometry) {
case DAC960_V2_Geometry_128_32:
geo->heads = 128;
geo->sectors = 32;
break;
case DAC960_V2_Geometry_255_63:
geo->heads = 255;
geo->sectors = 63;
break;
default:
DAC960_Error("Illegal Logical Device Geometry %d\n",
p, i->DriveGeometry);
return -EINVAL;
}
geo->cylinders = i->ConfigurableDeviceSize /
(geo->heads * geo->sectors);
}
return 0;
}
static int DAC960_media_changed(struct gendisk *disk)
{
DAC960_Controller_T *p = disk->queue->queuedata;
int drive_nr = (long)disk->private_data;
if (!p->LogicalDriveInitiallyAccessible[drive_nr])
return 1;
return 0;
}
static int DAC960_revalidate_disk(struct gendisk *disk)
{
DAC960_Controller_T *p = disk->queue->queuedata;
int unit = (long)disk->private_data;
set_capacity(disk, disk_size(p, unit));
return 0;
}
static struct block_device_operations DAC960_BlockDeviceOperations = {
.owner = THIS_MODULE,
.open = DAC960_open,
.getgeo = DAC960_getgeo,
.media_changed = DAC960_media_changed,
.revalidate_disk = DAC960_revalidate_disk,
};
/*
DAC960_AnnounceDriver announces the Driver Version and Date, Author's Name,
Copyright Notice, and Electronic Mail Address.
*/
static void DAC960_AnnounceDriver(DAC960_Controller_T *Controller)
{
DAC960_Announce("***** DAC960 RAID Driver Version "
DAC960_DriverVersion " of "
DAC960_DriverDate " *****\n", Controller);
DAC960_Announce("Copyright 1998-2001 by Leonard N. Zubkoff "
"<lnz@dandelion.com>\n", Controller);
}
/*
DAC960_Failure prints a standardized error message, and then returns false.
*/
static bool DAC960_Failure(DAC960_Controller_T *Controller,
unsigned char *ErrorMessage)
{
DAC960_Error("While configuring DAC960 PCI RAID Controller at\n",
Controller);
if (Controller->IO_Address == 0)
DAC960_Error("PCI Bus %d Device %d Function %d I/O Address N/A "
"PCI Address 0x%X\n", Controller,
Controller->Bus, Controller->Device,
Controller->Function, Controller->PCI_Address);
else DAC960_Error("PCI Bus %d Device %d Function %d I/O Address "
"0x%X PCI Address 0x%X\n", Controller,
Controller->Bus, Controller->Device,
Controller->Function, Controller->IO_Address,
Controller->PCI_Address);
DAC960_Error("%s FAILED - DETACHING\n", Controller, ErrorMessage);
return false;
}
/*
init_dma_loaf() and slice_dma_loaf() are helper functions for
aggregating the dma-mapped memory for a well-known collection of
data structures that are of different lengths.
These routines don't guarantee any alignment. The caller must
include any space needed for alignment in the sizes of the structures
that are passed in.
*/
static bool init_dma_loaf(struct pci_dev *dev, struct dma_loaf *loaf,
size_t len)
{
void *cpu_addr;
dma_addr_t dma_handle;
cpu_addr = pci_alloc_consistent(dev, len, &dma_handle);
if (cpu_addr == NULL)
return false;
loaf->cpu_free = loaf->cpu_base = cpu_addr;
loaf->dma_free =loaf->dma_base = dma_handle;
loaf->length = len;
memset(cpu_addr, 0, len);
return true;
}
static void *slice_dma_loaf(struct dma_loaf *loaf, size_t len,
dma_addr_t *dma_handle)
{
void *cpu_end = loaf->cpu_free + len;
void *cpu_addr = loaf->cpu_free;
BUG_ON(cpu_end > loaf->cpu_base + loaf->length);
*dma_handle = loaf->dma_free;
loaf->cpu_free = cpu_end;
loaf->dma_free += len;
return cpu_addr;
}
static void free_dma_loaf(struct pci_dev *dev, struct dma_loaf *loaf_handle)
{
if (loaf_handle->cpu_base != NULL)
pci_free_consistent(dev, loaf_handle->length,
loaf_handle->cpu_base, loaf_handle->dma_base);
}
/*
DAC960_CreateAuxiliaryStructures allocates and initializes the auxiliary
data structures for Controller. It returns true on success and false on
failure.
*/
static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
{
int CommandAllocationLength, CommandAllocationGroupSize;
int CommandsRemaining = 0, CommandIdentifier, CommandGroupByteCount;
void *AllocationPointer = NULL;
void *ScatterGatherCPU = NULL;
dma_addr_t ScatterGatherDMA;
struct pci_pool *ScatterGatherPool;
void *RequestSenseCPU = NULL;
dma_addr_t RequestSenseDMA;
struct pci_pool *RequestSensePool = NULL;
if (Controller->FirmwareType == DAC960_V1_Controller)
{
CommandAllocationLength = offsetof(DAC960_Command_T, V1.EndMarker);
CommandAllocationGroupSize = DAC960_V1_CommandAllocationGroupSize;
ScatterGatherPool = pci_pool_create("DAC960_V1_ScatterGather",
Controller->PCIDevice,
DAC960_V1_ScatterGatherLimit * sizeof(DAC960_V1_ScatterGatherSegment_T),
sizeof(DAC960_V1_ScatterGatherSegment_T), 0);
if (ScatterGatherPool == NULL)
return DAC960_Failure(Controller,
"AUXILIARY STRUCTURE CREATION (SG)");
Controller->ScatterGatherPool = ScatterGatherPool;
}
else
{
CommandAllocationLength = offsetof(DAC960_Command_T, V2.EndMarker);
CommandAllocationGroupSize = DAC960_V2_CommandAllocationGroupSize;
ScatterGatherPool = pci_pool_create("DAC960_V2_ScatterGather",
Controller->PCIDevice,
DAC960_V2_ScatterGatherLimit * sizeof(DAC960_V2_ScatterGatherSegment_T),
sizeof(DAC960_V2_ScatterGatherSegment_T), 0);
if (ScatterGatherPool == NULL)
return DAC960_Failure(Controller,
"AUXILIARY STRUCTURE CREATION (SG)");
RequestSensePool = pci_pool_create("DAC960_V2_RequestSense",
Controller->PCIDevice, sizeof(DAC960_SCSI_RequestSense_T),
sizeof(int), 0);
if (RequestSensePool == NULL) {
pci_pool_destroy(ScatterGatherPool);
return DAC960_Failure(Controller,
"AUXILIARY STRUCTURE CREATION (SG)");
}
Controller->ScatterGatherPool = ScatterGatherPool;
Controller->V2.RequestSensePool = RequestSensePool;
}
Controller->CommandAllocationGroupSize = CommandAllocationGroupSize;
Controller->FreeCommands = NULL;
for (CommandIdentifier = 1;
CommandIdentifier <= Controller->DriverQueueDepth;
CommandIdentifier++)
{
DAC960_Command_T *Command;
if (--CommandsRemaining <= 0)
{
CommandsRemaining =
Controller->DriverQueueDepth - CommandIdentifier + 1;
if (CommandsRemaining > CommandAllocationGroupSize)
CommandsRemaining = CommandAllocationGroupSize;
CommandGroupByteCount =
CommandsRemaining * CommandAllocationLength;
AllocationPointer = kzalloc(CommandGroupByteCount, GFP_ATOMIC);
if (AllocationPointer == NULL)
return DAC960_Failure(Controller,
"AUXILIARY STRUCTURE CREATION");
}
Command = (DAC960_Command_T *) AllocationPointer;
AllocationPointer += CommandAllocationLength;
Command->CommandIdentifier = CommandIdentifier;
Command->Controller = Controller;
Command->Next = Controller->FreeCommands;
Controller->FreeCommands = Command;
Controller->Commands[CommandIdentifier-1] = Command;
ScatterGatherCPU = pci_pool_alloc(ScatterGatherPool, GFP_ATOMIC,
&ScatterGatherDMA);
if (ScatterGatherCPU == NULL)
return DAC960_Failure(Controller, "AUXILIARY STRUCTURE CREATION");
if (RequestSensePool != NULL) {
RequestSenseCPU = pci_pool_alloc(RequestSensePool, GFP_ATOMIC,
&RequestSenseDMA);
if (RequestSenseCPU == NULL) {
pci_pool_free(ScatterGatherPool, ScatterGatherCPU,
ScatterGatherDMA);
return DAC960_Failure(Controller,
"AUXILIARY STRUCTURE CREATION");
}
}
if (Controller->FirmwareType == DAC960_V1_Controller) {
Command->cmd_sglist = Command->V1.ScatterList;
Command->V1.ScatterGatherList =
(DAC960_V1_ScatterGatherSegment_T *)ScatterGatherCPU;
Command->V1.ScatterGatherListDMA = ScatterGatherDMA;
sg_init_table(Command->cmd_sglist, DAC960_V1_ScatterGatherLimit);
} else {
Command->cmd_sglist = Command->V2.ScatterList;
Command->V2.ScatterGatherList =
(DAC960_V2_ScatterGatherSegment_T *)ScatterGatherCPU;
Command->V2.ScatterGatherListDMA = ScatterGatherDMA;
Command->V2.RequestSense =
(DAC960_SCSI_RequestSense_T *)RequestSenseCPU;
Command->V2.RequestSenseDMA = RequestSenseDMA;
sg_init_table(Command->cmd_sglist, DAC960_V2_ScatterGatherLimit);
}
}
return true;
}
/*
DAC960_DestroyAuxiliaryStructures deallocates the auxiliary data
structures for Controller.
*/
static void DAC960_DestroyAuxiliaryStructures(DAC960_Controller_T *Controller)
{
int i;
struct pci_pool *ScatterGatherPool = Controller->ScatterGatherPool;
struct pci_pool *RequestSensePool = NULL;
void *ScatterGatherCPU;
dma_addr_t ScatterGatherDMA;
void *RequestSenseCPU;
dma_addr_t RequestSenseDMA;
DAC960_Command_T *CommandGroup = NULL;
if (Controller->FirmwareType == DAC960_V2_Controller)
RequestSensePool = Controller->V2.RequestSensePool;
Controller->FreeCommands = NULL;
for (i = 0; i < Controller->DriverQueueDepth; i++)
{
DAC960_Command_T *Command = Controller->Commands[i];
if (Command == NULL)
continue;
if (Controller->FirmwareType == DAC960_V1_Controller) {
ScatterGatherCPU = (void *)Command->V1.ScatterGatherList;
ScatterGatherDMA = Command->V1.ScatterGatherListDMA;
RequestSenseCPU = NULL;
RequestSenseDMA = (dma_addr_t)0;
} else {
ScatterGatherCPU = (void *)Command->V2.ScatterGatherList;
ScatterGatherDMA = Command->V2.ScatterGatherListDMA;
RequestSenseCPU = (void *)Command->V2.RequestSense;
RequestSenseDMA = Command->V2.RequestSenseDMA;
}
if (ScatterGatherCPU != NULL)
pci_pool_free(ScatterGatherPool, ScatterGatherCPU, ScatterGatherDMA);
if (RequestSenseCPU != NULL)
pci_pool_free(RequestSensePool, RequestSenseCPU, RequestSenseDMA);
if ((Command->CommandIdentifier
% Controller->CommandAllocationGroupSize) == 1) {
/*
* We can't free the group of commands until all of the
* request sense and scatter gather dma structures are free.
* Remember the beginning of the group, but don't free it
* until we've reached the beginning of the next group.
*/
kfree(CommandGroup);
CommandGroup = Command;
}
Controller->Commands[i] = NULL;
}
kfree(CommandGroup);
if (Controller->CombinedStatusBuffer != NULL)
{
kfree(Controller->CombinedStatusBuffer);
Controller->CombinedStatusBuffer = NULL;
Controller->CurrentStatusBuffer = NULL;
}
if (ScatterGatherPool != NULL)
pci_pool_destroy(ScatterGatherPool);
if (Controller->FirmwareType == DAC960_V1_Controller)
return;
if (RequestSensePool != NULL)
pci_pool_destroy(RequestSensePool);
for (i = 0; i < DAC960_MaxLogicalDrives; i++) {
kfree(Controller->V2.LogicalDeviceInformation[i]);
Controller->V2.LogicalDeviceInformation[i] = NULL;
}
for (i = 0; i < DAC960_V2_MaxPhysicalDevices; i++)
{
kfree(Controller->V2.PhysicalDeviceInformation[i]);
Controller->V2.PhysicalDeviceInformation[i] = NULL;
kfree(Controller->V2.InquiryUnitSerialNumber[i]);
Controller->V2.InquiryUnitSerialNumber[i] = NULL;
}
}
/*
DAC960_V1_ClearCommand clears critical fields of Command for DAC960 V1
Firmware Controllers.
*/
static inline void DAC960_V1_ClearCommand(DAC960_Command_T *Command)
{
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
memset(CommandMailbox, 0, sizeof(DAC960_V1_CommandMailbox_T));
Command->V1.CommandStatus = 0;
}
/*
DAC960_V2_ClearCommand clears critical fields of Command for DAC960 V2
Firmware Controllers.
*/
static inline void DAC960_V2_ClearCommand(DAC960_Command_T *Command)
{
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
memset(CommandMailbox, 0, sizeof(DAC960_V2_CommandMailbox_T));
Command->V2.CommandStatus = 0;
}
/*
DAC960_AllocateCommand allocates a Command structure from Controller's
free list. During driver initialization, a special initialization command
has been placed on the free list to guarantee that command allocation can
never fail.
*/
static inline DAC960_Command_T *DAC960_AllocateCommand(DAC960_Controller_T
*Controller)
{
DAC960_Command_T *Command = Controller->FreeCommands;
if (Command == NULL) return NULL;
Controller->FreeCommands = Command->Next;
Command->Next = NULL;
return Command;
}
/*
DAC960_DeallocateCommand deallocates Command, returning it to Controller's
free list.
*/
static inline void DAC960_DeallocateCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
Command->Request = NULL;
Command->Next = Controller->FreeCommands;
Controller->FreeCommands = Command;
}
/*
DAC960_WaitForCommand waits for a wake_up on Controller's Command Wait Queue.
*/
static void DAC960_WaitForCommand(DAC960_Controller_T *Controller)
{
spin_unlock_irq(&Controller->queue_lock);
__wait_event(Controller->CommandWaitQueue, Controller->FreeCommands);
spin_lock_irq(&Controller->queue_lock);
}
/*
DAC960_GEM_QueueCommand queues Command for DAC960 GEM Series Controllers.
*/
static void DAC960_GEM_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandMailbox_T *NextCommandMailbox =
Controller->V2.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_GEM_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
DAC960_GEM_MemoryMailboxNewCommand(ControllerBaseAddress);
Controller->V2.PreviousCommandMailbox2 =
Controller->V2.PreviousCommandMailbox1;
Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
NextCommandMailbox = Controller->V2.FirstCommandMailbox;
Controller->V2.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_BA_QueueCommand queues Command for DAC960 BA Series Controllers.
*/
static void DAC960_BA_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandMailbox_T *NextCommandMailbox =
Controller->V2.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_BA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
DAC960_BA_MemoryMailboxNewCommand(ControllerBaseAddress);
Controller->V2.PreviousCommandMailbox2 =
Controller->V2.PreviousCommandMailbox1;
Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
NextCommandMailbox = Controller->V2.FirstCommandMailbox;
Controller->V2.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_LP_QueueCommand queues Command for DAC960 LP Series Controllers.
*/
static void DAC960_LP_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandMailbox_T *NextCommandMailbox =
Controller->V2.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_LP_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
DAC960_LP_MemoryMailboxNewCommand(ControllerBaseAddress);
Controller->V2.PreviousCommandMailbox2 =
Controller->V2.PreviousCommandMailbox1;
Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
NextCommandMailbox = Controller->V2.FirstCommandMailbox;
Controller->V2.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_LA_QueueCommandDualMode queues Command for DAC960 LA Series
Controllers with Dual Mode Firmware.
*/
static void DAC960_LA_QueueCommandDualMode(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandMailbox_T *NextCommandMailbox =
Controller->V1.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_LA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
DAC960_LA_MemoryMailboxNewCommand(ControllerBaseAddress);
Controller->V1.PreviousCommandMailbox2 =
Controller->V1.PreviousCommandMailbox1;
Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
NextCommandMailbox = Controller->V1.FirstCommandMailbox;
Controller->V1.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_LA_QueueCommandSingleMode queues Command for DAC960 LA Series
Controllers with Single Mode Firmware.
*/
static void DAC960_LA_QueueCommandSingleMode(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandMailbox_T *NextCommandMailbox =
Controller->V1.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_LA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
DAC960_LA_HardwareMailboxNewCommand(ControllerBaseAddress);
Controller->V1.PreviousCommandMailbox2 =
Controller->V1.PreviousCommandMailbox1;
Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
NextCommandMailbox = Controller->V1.FirstCommandMailbox;
Controller->V1.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_PG_QueueCommandDualMode queues Command for DAC960 PG Series
Controllers with Dual Mode Firmware.
*/
static void DAC960_PG_QueueCommandDualMode(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandMailbox_T *NextCommandMailbox =
Controller->V1.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_PG_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
DAC960_PG_MemoryMailboxNewCommand(ControllerBaseAddress);
Controller->V1.PreviousCommandMailbox2 =
Controller->V1.PreviousCommandMailbox1;
Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
NextCommandMailbox = Controller->V1.FirstCommandMailbox;
Controller->V1.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_PG_QueueCommandSingleMode queues Command for DAC960 PG Series
Controllers with Single Mode Firmware.
*/
static void DAC960_PG_QueueCommandSingleMode(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandMailbox_T *NextCommandMailbox =
Controller->V1.NextCommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
DAC960_PG_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
DAC960_PG_HardwareMailboxNewCommand(ControllerBaseAddress);
Controller->V1.PreviousCommandMailbox2 =
Controller->V1.PreviousCommandMailbox1;
Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
NextCommandMailbox = Controller->V1.FirstCommandMailbox;
Controller->V1.NextCommandMailbox = NextCommandMailbox;
}
/*
DAC960_PD_QueueCommand queues Command for DAC960 PD Series Controllers.
*/
static void DAC960_PD_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
while (DAC960_PD_MailboxFullP(ControllerBaseAddress))
udelay(1);
DAC960_PD_WriteCommandMailbox(ControllerBaseAddress, CommandMailbox);
DAC960_PD_NewCommand(ControllerBaseAddress);
}
/*
DAC960_P_QueueCommand queues Command for DAC960 P Series Controllers.
*/
static void DAC960_P_QueueCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
void __iomem *ControllerBaseAddress = Controller->BaseAddress;
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
switch (CommandMailbox->Common.CommandOpcode)
{
case DAC960_V1_Enquiry:
CommandMailbox->Common.CommandOpcode = DAC960_V1_Enquiry_Old;
break;
case DAC960_V1_GetDeviceState:
CommandMailbox->Common.CommandOpcode = DAC960_V1_GetDeviceState_Old;
break;
case DAC960_V1_Read:
CommandMailbox->Common.CommandOpcode = DAC960_V1_Read_Old;
DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
break;
case DAC960_V1_Write:
CommandMailbox->Common.CommandOpcode = DAC960_V1_Write_Old;
DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
break;
case DAC960_V1_ReadWithScatterGather:
CommandMailbox->Common.CommandOpcode =
DAC960_V1_ReadWithScatterGather_Old;
DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
break;
case DAC960_V1_WriteWithScatterGather:
CommandMailbox->Common.CommandOpcode =
DAC960_V1_WriteWithScatterGather_Old;
DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
break;
default:
break;
}
while (DAC960_PD_MailboxFullP(ControllerBaseAddress))
udelay(1);
DAC960_PD_WriteCommandMailbox(ControllerBaseAddress, CommandMailbox);
DAC960_PD_NewCommand(ControllerBaseAddress);
}
/*
DAC960_ExecuteCommand executes Command and waits for completion.
*/
static void DAC960_ExecuteCommand(DAC960_Command_T *Command)
{
DAC960_Controller_T *Controller = Command->Controller;
DECLARE_COMPLETION_ONSTACK(Completion);
unsigned long flags;
Command->Completion = &Completion;
spin_lock_irqsave(&Controller->queue_lock, flags);
DAC960_QueueCommand(Command);
spin_unlock_irqrestore(&Controller->queue_lock, flags);
if (in_interrupt())
return;
wait_for_completion(&Completion);
}
/*
DAC960_V1_ExecuteType3 executes a DAC960 V1 Firmware Controller Type 3
Command and waits for completion. It returns true on success and false
on failure.
*/
static bool DAC960_V1_ExecuteType3(DAC960_Controller_T *Controller,
DAC960_V1_CommandOpcode_T CommandOpcode,
dma_addr_t DataDMA)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandStatus_T CommandStatus;
DAC960_V1_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->Type3.CommandOpcode = CommandOpcode;
CommandMailbox->Type3.BusAddress = DataDMA;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V1.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V1_NormalCompletion);
}
/*
DAC960_V1_ExecuteTypeB executes a DAC960 V1 Firmware Controller Type 3B
Command and waits for completion. It returns true on success and false
on failure.
*/
static bool DAC960_V1_ExecuteType3B(DAC960_Controller_T *Controller,
DAC960_V1_CommandOpcode_T CommandOpcode,
unsigned char CommandOpcode2,
dma_addr_t DataDMA)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandStatus_T CommandStatus;
DAC960_V1_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->Type3B.CommandOpcode = CommandOpcode;
CommandMailbox->Type3B.CommandOpcode2 = CommandOpcode2;
CommandMailbox->Type3B.BusAddress = DataDMA;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V1.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V1_NormalCompletion);
}
/*
DAC960_V1_ExecuteType3D executes a DAC960 V1 Firmware Controller Type 3D
Command and waits for completion. It returns true on success and false
on failure.
*/
static bool DAC960_V1_ExecuteType3D(DAC960_Controller_T *Controller,
DAC960_V1_CommandOpcode_T CommandOpcode,
unsigned char Channel,
unsigned char TargetID,
dma_addr_t DataDMA)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
DAC960_V1_CommandStatus_T CommandStatus;
DAC960_V1_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->Type3D.CommandOpcode = CommandOpcode;
CommandMailbox->Type3D.Channel = Channel;
CommandMailbox->Type3D.TargetID = TargetID;
CommandMailbox->Type3D.BusAddress = DataDMA;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V1.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V1_NormalCompletion);
}
/*
DAC960_V2_GeneralInfo executes a DAC960 V2 Firmware General Information
Reading IOCTL Command and waits for completion. It returns true on success
and false on failure.
Return data in The controller's HealthStatusBuffer, which is dma-able memory
*/
static bool DAC960_V2_GeneralInfo(DAC960_Controller_T *Controller)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandStatus_T CommandStatus;
DAC960_V2_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->Common.CommandOpcode = DAC960_V2_IOCTL;
CommandMailbox->Common.CommandControlBits
.DataTransferControllerToHost = true;
CommandMailbox->Common.CommandControlBits
.NoAutoRequestSense = true;
CommandMailbox->Common.DataTransferSize = sizeof(DAC960_V2_HealthStatusBuffer_T);
CommandMailbox->Common.IOCTL_Opcode = DAC960_V2_GetHealthStatus;
CommandMailbox->Common.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentDataPointer =
Controller->V2.HealthStatusBufferDMA;
CommandMailbox->Common.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentByteCount =
CommandMailbox->Common.DataTransferSize;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V2.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V2_NormalCompletion);
}
/*
DAC960_V2_ControllerInfo executes a DAC960 V2 Firmware Controller
Information Reading IOCTL Command and waits for completion. It returns
true on success and false on failure.
Data is returned in the controller's V2.NewControllerInformation dma-able
memory buffer.
*/
static bool DAC960_V2_NewControllerInfo(DAC960_Controller_T *Controller)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandStatus_T CommandStatus;
DAC960_V2_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->ControllerInfo.CommandOpcode = DAC960_V2_IOCTL;
CommandMailbox->ControllerInfo.CommandControlBits
.DataTransferControllerToHost = true;
CommandMailbox->ControllerInfo.CommandControlBits
.NoAutoRequestSense = true;
CommandMailbox->ControllerInfo.DataTransferSize = sizeof(DAC960_V2_ControllerInfo_T);
CommandMailbox->ControllerInfo.ControllerNumber = 0;
CommandMailbox->ControllerInfo.IOCTL_Opcode = DAC960_V2_GetControllerInfo;
CommandMailbox->ControllerInfo.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentDataPointer =
Controller->V2.NewControllerInformationDMA;
CommandMailbox->ControllerInfo.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentByteCount =
CommandMailbox->ControllerInfo.DataTransferSize;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V2.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V2_NormalCompletion);
}
/*
DAC960_V2_LogicalDeviceInfo executes a DAC960 V2 Firmware Controller Logical
Device Information Reading IOCTL Command and waits for completion. It
returns true on success and false on failure.
Data is returned in the controller's V2.NewLogicalDeviceInformation
*/
static bool DAC960_V2_NewLogicalDeviceInfo(DAC960_Controller_T *Controller,
unsigned short LogicalDeviceNumber)
{
DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_CommandStatus_T CommandStatus;
DAC960_V2_ClearCommand(Command);
Command->CommandType = DAC960_ImmediateCommand;
CommandMailbox->LogicalDeviceInfo.CommandOpcode =
DAC960_V2_IOCTL;
CommandMailbox->LogicalDeviceInfo.CommandControlBits
.DataTransferControllerToHost = true;
CommandMailbox->LogicalDeviceInfo.CommandControlBits
.NoAutoRequestSense = true;
CommandMailbox->LogicalDeviceInfo.DataTransferSize =
sizeof(DAC960_V2_LogicalDeviceInfo_T);
CommandMailbox->LogicalDeviceInfo.LogicalDevice.LogicalDeviceNumber =
LogicalDeviceNumber;
CommandMailbox->LogicalDeviceInfo.IOCTL_Opcode = DAC960_V2_GetLogicalDeviceInfoValid;
CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentDataPointer =
Controller->V2.NewLogicalDeviceInformationDMA;
CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
.ScatterGatherSegments[0]
.SegmentByteCount =
CommandMailbox->LogicalDeviceInfo.DataTransferSize;
DAC960_ExecuteCommand(Command);
CommandStatus = Command->V2.CommandStatus;
DAC960_DeallocateCommand(Command);
return (CommandStatus == DAC960_V2_NormalCompletion);
}
/*
DAC960_V2_PhysicalDeviceInfo executes a DAC960 V2 Firmware Controller "Read
Physical Device Information" IOCTL Command and waits for completion. It
returns true on success and false on failure.
The Channel, TargetID, LogicalUnit arguments should be 0 the first time
this function is called for a given controller. This will return data
for the "first" device on that controller. The returned data includes a
Channel, TargetID, LogicalUnit that can be passed in to this routine to
get data for the NEXT device on that controller.
Data is stored in the controller's V2.NewPhysicalDeviceInfo dma-able
memory buffer.