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kernel_optimize_test/drivers/scsi/arcmsr/arcmsr_hba.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

1496 lines
46 KiB
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/*
*******************************************************************************
** O.S : Linux
** FILE NAME : arcmsr_hba.c
** BY : Erich Chen
** Description: SCSI RAID Device Driver for
** ARECA RAID Host adapter
*******************************************************************************
** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
**
** Web site: www.areca.com.tw
** E-mail: erich@areca.com.tw
**
** This program is free software; you can redistribute it 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 more details.
*******************************************************************************
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
*******************************************************************************
*/
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/pci_ids.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsicam.h>
#include "arcmsr.h"
MODULE_AUTHOR("Erich Chen <erich@areca.com.tw>");
MODULE_DESCRIPTION("ARECA (ARC11xx/12xx) SATA RAID HOST Adapter");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(ARCMSR_DRIVER_VERSION);
static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_cmnd *cmd);
static int arcmsr_abort(struct scsi_cmnd *);
static int arcmsr_bus_reset(struct scsi_cmnd *);
static int arcmsr_bios_param(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *info);
static int arcmsr_queue_command(struct scsi_cmnd * cmd,
void (*done) (struct scsi_cmnd *));
static int arcmsr_probe(struct pci_dev *pdev,
const struct pci_device_id *id);
static void arcmsr_remove(struct pci_dev *pdev);
static void arcmsr_shutdown(struct pci_dev *pdev);
static void arcmsr_iop_init(struct AdapterControlBlock *acb);
static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb);
static uint8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb);
static const char *arcmsr_info(struct Scsi_Host *);
static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev, int queue_depth)
{
if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
queue_depth = ARCMSR_MAX_CMD_PERLUN;
scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
return queue_depth;
}
static struct scsi_host_template arcmsr_scsi_host_template = {
.module = THIS_MODULE,
.name = "ARCMSR ARECA SATA RAID HOST Adapter" ARCMSR_DRIVER_VERSION,
.info = arcmsr_info,
.queuecommand = arcmsr_queue_command,
.eh_abort_handler = arcmsr_abort,
.eh_bus_reset_handler = arcmsr_bus_reset,
.bios_param = arcmsr_bios_param,
.change_queue_depth = arcmsr_adjust_disk_queue_depth,
.can_queue = ARCMSR_MAX_OUTSTANDING_CMD,
.this_id = ARCMSR_SCSI_INITIATOR_ID,
.sg_tablesize = ARCMSR_MAX_SG_ENTRIES,
.max_sectors = ARCMSR_MAX_XFER_SECTORS,
.cmd_per_lun = ARCMSR_MAX_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = arcmsr_host_attrs,
};
static struct pci_device_id arcmsr_device_id_table[] = {
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1120)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1130)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1160)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1170)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1220)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1230)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1260)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1270)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1280)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1380)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1381)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1680)},
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1681)},
{0, 0}, /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
static struct pci_driver arcmsr_pci_driver = {
.name = "arcmsr",
.id_table = arcmsr_device_id_table,
.probe = arcmsr_probe,
.remove = arcmsr_remove,
.shutdown = arcmsr_shutdown
};
static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
{
irqreturn_t handle_state;
struct AdapterControlBlock *acb;
unsigned long flags;
acb = (struct AdapterControlBlock *)dev_id;
spin_lock_irqsave(acb->host->host_lock, flags);
handle_state = arcmsr_interrupt(acb);
spin_unlock_irqrestore(acb->host->host_lock, flags);
return handle_state;
}
static int arcmsr_bios_param(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *geom)
{
int ret, heads, sectors, cylinders, total_capacity;
unsigned char *buffer;/* return copy of block device's partition table */
buffer = scsi_bios_ptable(bdev);
if (buffer) {
ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
kfree(buffer);
if (ret != -1)
return ret;
}
total_capacity = capacity;
heads = 64;
sectors = 32;
cylinders = total_capacity / (heads * sectors);
if (cylinders > 1024) {
heads = 255;
sectors = 63;
cylinders = total_capacity / (heads * sectors);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return 0;
}
static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
{
struct pci_dev *pdev = acb->pdev;
struct MessageUnit __iomem *reg = acb->pmu;
u32 ccb_phyaddr_hi32;
void *dma_coherent;
dma_addr_t dma_coherent_handle, dma_addr;
struct CommandControlBlock *ccb_tmp;
int i, j;
dma_coherent = dma_alloc_coherent(&pdev->dev,
ARCMSR_MAX_FREECCB_NUM *
sizeof (struct CommandControlBlock) + 0x20,
&dma_coherent_handle, GFP_KERNEL);
if (!dma_coherent)
return -ENOMEM;
acb->dma_coherent = dma_coherent;
acb->dma_coherent_handle = dma_coherent_handle;
if (((unsigned long)dma_coherent & 0x1F)) {
dma_coherent = dma_coherent +
(0x20 - ((unsigned long)dma_coherent & 0x1F));
dma_coherent_handle = dma_coherent_handle +
(0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
}
dma_addr = dma_coherent_handle;
ccb_tmp = (struct CommandControlBlock *)dma_coherent;
for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
ccb_tmp->acb = acb;
acb->pccb_pool[i] = ccb_tmp;
list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
dma_addr = dma_addr + sizeof (struct CommandControlBlock);
ccb_tmp++;
}
acb->vir2phy_offset = (unsigned long)ccb_tmp -
(unsigned long)dma_addr;
for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
acb->devstate[i][j] = ARECA_RAID_GOOD;
/*
** here we need to tell iop 331 our ccb_tmp.HighPart
** if ccb_tmp.HighPart is not zero
*/
ccb_phyaddr_hi32 = (uint32_t) ((dma_coherent_handle >> 16) >> 16);
if (ccb_phyaddr_hi32 != 0) {
writel(ARCMSR_SIGNATURE_SET_CONFIG, &reg->message_rwbuffer[0]);
writel(ccb_phyaddr_hi32, &reg->message_rwbuffer[1]);
writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb))
printk(KERN_NOTICE "arcmsr%d: "
"'set ccb high part physical address' timeout\n",
acb->host->host_no);
}
writel(readl(&reg->outbound_intmask) |
ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
&reg->outbound_intmask);
return 0;
}
static int arcmsr_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct Scsi_Host *host;
struct AdapterControlBlock *acb;
uint8_t bus, dev_fun;
int error;
error = pci_enable_device(pdev);
if (error)
goto out;
pci_set_master(pdev);
host = scsi_host_alloc(&arcmsr_scsi_host_template,
sizeof(struct AdapterControlBlock));
if (!host) {
error = -ENOMEM;
goto out_disable_device;
}
acb = (struct AdapterControlBlock *)host->hostdata;
memset(acb, 0, sizeof (struct AdapterControlBlock));
error = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
if (error) {
error = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (error) {
printk(KERN_WARNING
"scsi%d: No suitable DMA mask available\n",
host->host_no);
goto out_host_put;
}
}
bus = pdev->bus->number;
dev_fun = pdev->devfn;
acb->host = host;
acb->pdev = pdev;
host->max_sectors = ARCMSR_MAX_XFER_SECTORS;
host->max_lun = ARCMSR_MAX_TARGETLUN;
host->max_id = ARCMSR_MAX_TARGETID;/*16:8*/
host->max_cmd_len = 16; /*this is issue of 64bit LBA, over 2T byte*/
host->sg_tablesize = ARCMSR_MAX_SG_ENTRIES;
host->can_queue = ARCMSR_MAX_FREECCB_NUM; /* max simultaneous cmds */
host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;
host->this_id = ARCMSR_SCSI_INITIATOR_ID;
host->unique_id = (bus << 8) | dev_fun;
host->irq = pdev->irq;
error = pci_request_regions(pdev, "arcmsr");
if (error)
goto out_host_put;
acb->pmu = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!acb->pmu) {
printk(KERN_NOTICE "arcmsr%d: memory"
" mapping region fail \n", acb->host->host_no);
goto out_release_regions;
}
acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
ACB_F_MESSAGE_RQBUFFER_CLEARED |
ACB_F_MESSAGE_WQBUFFER_READED);
acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
INIT_LIST_HEAD(&acb->ccb_free_list);
error = arcmsr_alloc_ccb_pool(acb);
if (error)
goto out_iounmap;
error = request_irq(pdev->irq, arcmsr_do_interrupt,
SA_INTERRUPT | SA_SHIRQ, "arcmsr", acb);
if (error)
goto out_free_ccb_pool;
arcmsr_iop_init(acb);
pci_set_drvdata(pdev, host);
error = scsi_add_host(host, &pdev->dev);
if (error)
goto out_free_irq;
error = arcmsr_alloc_sysfs_attr(acb);
if (error)
goto out_free_sysfs;
scsi_scan_host(host);
return 0;
out_free_sysfs:
out_free_irq:
free_irq(pdev->irq, acb);
out_free_ccb_pool:
arcmsr_free_ccb_pool(acb);
out_iounmap:
iounmap(acb->pmu);
out_release_regions:
pci_release_regions(pdev);
out_host_put:
scsi_host_put(host);
out_disable_device:
pci_disable_device(pdev);
out:
return error;
}
static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb))
printk(KERN_NOTICE
"arcmsr%d: wait 'abort all outstanding command' timeout \n"
, acb->host->host_no);
}
static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
{
struct AdapterControlBlock *acb = ccb->acb;
struct scsi_cmnd *pcmd = ccb->pcmd;
if (pcmd->use_sg != 0) {
struct scatterlist *sl;
sl = (struct scatterlist *)pcmd->request_buffer;
pci_unmap_sg(acb->pdev, sl, pcmd->use_sg, pcmd->sc_data_direction);
}
else if (pcmd->request_bufflen != 0)
pci_unmap_single(acb->pdev,
pcmd->SCp.dma_handle,
pcmd->request_bufflen, pcmd->sc_data_direction);
}
static void arcmsr_ccb_complete(struct CommandControlBlock *ccb, int stand_flag)
{
struct AdapterControlBlock *acb = ccb->acb;
struct scsi_cmnd *pcmd = ccb->pcmd;
arcmsr_pci_unmap_dma(ccb);
if (stand_flag == 1)
atomic_dec(&acb->ccboutstandingcount);
ccb->startdone = ARCMSR_CCB_DONE;
ccb->ccb_flags = 0;
list_add_tail(&ccb->list, &acb->ccb_free_list);
pcmd->scsi_done(pcmd);
}
static void arcmsr_remove(struct pci_dev *pdev)
{
struct Scsi_Host *host = pci_get_drvdata(pdev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
struct MessageUnit __iomem *reg = acb->pmu;
int poll_count = 0;
arcmsr_free_sysfs_attr(acb);
scsi_remove_host(host);
arcmsr_stop_adapter_bgrb(acb);
arcmsr_flush_adapter_cache(acb);
writel(readl(&reg->outbound_intmask) |
ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
&reg->outbound_intmask);
acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
acb->acb_flags &= ~ACB_F_IOP_INITED;
for (poll_count = 0; poll_count < 256; poll_count++) {
if (!atomic_read(&acb->ccboutstandingcount))
break;
arcmsr_interrupt(acb);
msleep(25);
}
if (atomic_read(&acb->ccboutstandingcount)) {
int i;
arcmsr_abort_allcmd(acb);
for (i = 0; i < ARCMSR_MAX_OUTSTANDING_CMD; i++)
readl(&reg->outbound_queueport);
for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
struct CommandControlBlock *ccb = acb->pccb_pool[i];
if (ccb->startdone == ARCMSR_CCB_START) {
ccb->startdone = ARCMSR_CCB_ABORTED;
ccb->pcmd->result = DID_ABORT << 16;
arcmsr_ccb_complete(ccb, 1);
}
}
}
free_irq(pdev->irq, acb);
iounmap(acb->pmu);
arcmsr_free_ccb_pool(acb);
pci_release_regions(pdev);
scsi_host_put(host);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
}
static void arcmsr_shutdown(struct pci_dev *pdev)
{
struct Scsi_Host *host = pci_get_drvdata(pdev);
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *)host->hostdata;
arcmsr_stop_adapter_bgrb(acb);
arcmsr_flush_adapter_cache(acb);
}
static int arcmsr_module_init(void)
{
int error = 0;
error = pci_register_driver(&arcmsr_pci_driver);
return error;
}
static void arcmsr_module_exit(void)
{
pci_unregister_driver(&arcmsr_pci_driver);
}
module_init(arcmsr_module_init);
module_exit(arcmsr_module_exit);
static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
u32 orig_mask = readl(&reg->outbound_intmask);
writel(orig_mask | ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE,
&reg->outbound_intmask);
return orig_mask;
}
static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
u32 orig_mask)
{
struct MessageUnit __iomem *reg = acb->pmu;
u32 mask;
mask = orig_mask & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
writel(mask, &reg->outbound_intmask);
}
static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg=acb->pmu;
writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb))
printk(KERN_NOTICE
"arcmsr%d: wait 'flush adapter cache' timeout \n"
, acb->host->host_no);
}
static void arcmsr_report_sense_info(struct CommandControlBlock *ccb)
{
struct scsi_cmnd *pcmd = ccb->pcmd;
struct SENSE_DATA *sensebuffer = (struct SENSE_DATA *)pcmd->sense_buffer;
pcmd->result = DID_OK << 16;
if (sensebuffer) {
int sense_data_length =
sizeof (struct SENSE_DATA) < sizeof (pcmd->sense_buffer)
? sizeof (struct SENSE_DATA) : sizeof (pcmd->sense_buffer);
memset(sensebuffer, 0, sizeof (pcmd->sense_buffer));
memcpy(sensebuffer, ccb->arcmsr_cdb.SenseData, sense_data_length);
sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
sensebuffer->Valid = 1;
}
}
static uint8_t arcmsr_wait_msgint_ready(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
uint32_t Index;
uint8_t Retries = 0x00;
do {
for (Index = 0; Index < 100; Index++) {
if (readl(&reg->outbound_intstatus)
& ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT
, &reg->outbound_intstatus);
return 0x00;
}
msleep_interruptible(10);
}/*max 1 seconds*/
} while (Retries++ < 20);/*max 20 sec*/
return 0xff;
}
static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
struct CommandControlBlock *ccb, struct scsi_cmnd *pcmd)
{
struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
int8_t *psge = (int8_t *)&arcmsr_cdb->u;
uint32_t address_lo, address_hi;
int arccdbsize = 0x30;
ccb->pcmd = pcmd;
memset(arcmsr_cdb, 0, sizeof (struct ARCMSR_CDB));
arcmsr_cdb->Bus = 0;
arcmsr_cdb->TargetID = pcmd->device->id;
arcmsr_cdb->LUN = pcmd->device->lun;
arcmsr_cdb->Function = 1;
arcmsr_cdb->CdbLength = (uint8_t)pcmd->cmd_len;
arcmsr_cdb->Context = (unsigned long)arcmsr_cdb;
memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
if (pcmd->use_sg) {
int length, sgcount, i, cdb_sgcount = 0;
struct scatterlist *sl;
/* Get Scatter Gather List from scsiport. */
sl = (struct scatterlist *) pcmd->request_buffer;
sgcount = pci_map_sg(acb->pdev, sl, pcmd->use_sg,
pcmd->sc_data_direction);
/* map stor port SG list to our iop SG List. */
for (i = 0; i < sgcount; i++) {
/* Get the physical address of the current data pointer */
length = cpu_to_le32(sg_dma_len(sl));
address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sl)));
address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sl)));
if (address_hi == 0) {
struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
pdma_sg->address = address_lo;
pdma_sg->length = length;
psge += sizeof (struct SG32ENTRY);
arccdbsize += sizeof (struct SG32ENTRY);
} else {
struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
pdma_sg->addresshigh = address_hi;
pdma_sg->address = address_lo;
pdma_sg->length = length|IS_SG64_ADDR;
psge += sizeof (struct SG64ENTRY);
arccdbsize += sizeof (struct SG64ENTRY);
}
sl++;
cdb_sgcount++;
}
arcmsr_cdb->sgcount = (uint8_t)cdb_sgcount;
arcmsr_cdb->DataLength = pcmd->request_bufflen;
if ( arccdbsize > 256)
arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
} else if (pcmd->request_bufflen) {
dma_addr_t dma_addr;
dma_addr = pci_map_single(acb->pdev, pcmd->request_buffer,
pcmd->request_bufflen, pcmd->sc_data_direction);
pcmd->SCp.dma_handle = dma_addr;
address_lo = cpu_to_le32(dma_addr_lo32(dma_addr));
address_hi = cpu_to_le32(dma_addr_hi32(dma_addr));
if (address_hi == 0) {
struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
pdma_sg->address = address_lo;
pdma_sg->length = pcmd->request_bufflen;
} else {
struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
pdma_sg->addresshigh = address_hi;
pdma_sg->address = address_lo;
pdma_sg->length = pcmd->request_bufflen|IS_SG64_ADDR;
}
arcmsr_cdb->sgcount = 1;
arcmsr_cdb->DataLength = pcmd->request_bufflen;
}
if (pcmd->sc_data_direction == DMA_TO_DEVICE ) {
arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
ccb->ccb_flags |= CCB_FLAG_WRITE;
}
}
static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandControlBlock *ccb)
{
struct MessageUnit __iomem *reg = acb->pmu;
uint32_t cdb_shifted_phyaddr = ccb->cdb_shifted_phyaddr;
struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
atomic_inc(&acb->ccboutstandingcount);
ccb->startdone = ARCMSR_CCB_START;
if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE)
writel(cdb_shifted_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,
&reg->inbound_queueport);
else
writel(cdb_shifted_phyaddr, &reg->inbound_queueport);
}
void arcmsr_post_Qbuffer(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
struct QBUFFER __iomem *pwbuffer = (struct QBUFFER __iomem *) &reg->message_wbuffer;
uint8_t __iomem *iop_data = (uint8_t __iomem *) pwbuffer->data;
int32_t allxfer_len = 0;
if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
&& (allxfer_len < 124)) {
writeb(acb->wqbuffer[acb->wqbuf_firstindex], iop_data);
acb->wqbuf_firstindex++;
acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
iop_data++;
allxfer_len++;
}
writel(allxfer_len, &pwbuffer->data_len);
writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK
, &reg->inbound_doorbell);
}
}
static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb))
printk(KERN_NOTICE
"arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
, acb->host->host_no);
}
static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb)
{
dma_free_coherent(&acb->pdev->dev,
ARCMSR_MAX_FREECCB_NUM * sizeof (struct CommandControlBlock) + 0x20,
acb->dma_coherent,
acb->dma_coherent_handle);
}
static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
struct CommandControlBlock *ccb;
uint32_t flag_ccb, outbound_intstatus, outbound_doorbell;
outbound_intstatus = readl(&reg->outbound_intstatus)
& acb->outbound_int_enable;
writel(outbound_intstatus, &reg->outbound_intstatus);
if (outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT) {
outbound_doorbell = readl(&reg->outbound_doorbell);
writel(outbound_doorbell, &reg->outbound_doorbell);
if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK) {
struct QBUFFER __iomem * prbuffer =
(struct QBUFFER __iomem *) &reg->message_rbuffer;
uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;
rqbuf_lastindex = acb->rqbuf_lastindex;
rqbuf_firstindex = acb->rqbuf_firstindex;
iop_len = readl(&prbuffer->data_len);
my_empty_len = (rqbuf_firstindex - rqbuf_lastindex - 1)
&(ARCMSR_MAX_QBUFFER - 1);
if (my_empty_len >= iop_len) {
while (iop_len > 0) {
acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
acb->rqbuf_lastindex++;
acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
iop_data++;
iop_len--;
}
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
&reg->inbound_doorbell);
} else
acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
}
if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_READ_OK) {
acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
if (acb->wqbuf_firstindex != acb->wqbuf_lastindex) {
struct QBUFFER __iomem * pwbuffer =
(struct QBUFFER __iomem *) &reg->message_wbuffer;
uint8_t __iomem * iop_data = (uint8_t __iomem *) pwbuffer->data;
int32_t allxfer_len = 0;
acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
&& (allxfer_len < 124)) {
writeb(acb->wqbuffer[acb->wqbuf_firstindex], iop_data);
acb->wqbuf_firstindex++;
acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
iop_data++;
allxfer_len++;
}
writel(allxfer_len, &pwbuffer->data_len);
writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK,
&reg->inbound_doorbell);
}
if (acb->wqbuf_firstindex == acb->wqbuf_lastindex)
acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
}
}
if (outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT) {
int id, lun;
/*
****************************************************************
** areca cdb command done
****************************************************************
*/
while (1) {
if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF)
break;/*chip FIFO no ccb for completion already*/
/* check if command done with no error*/
ccb = (struct CommandControlBlock *)(acb->vir2phy_offset +
(flag_ccb << 5));
if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
if (ccb->startdone == ARCMSR_CCB_ABORTED) {
struct scsi_cmnd *abortcmd=ccb->pcmd;
if (abortcmd) {
abortcmd->result |= DID_ABORT >> 16;
arcmsr_ccb_complete(ccb, 1);
printk(KERN_NOTICE
"arcmsr%d: ccb='0x%p' isr got aborted command \n"
, acb->host->host_no, ccb);
}
continue;
}
printk(KERN_NOTICE
"arcmsr%d: isr get an illegal ccb command done acb='0x%p'"
"ccb='0x%p' ccbacb='0x%p' startdone = 0x%x"
" ccboutstandingcount=%d \n"
, acb->host->host_no
, acb
, ccb
, ccb->acb
, ccb->startdone
, atomic_read(&acb->ccboutstandingcount));
continue;
}
id = ccb->pcmd->device->id;
lun = ccb->pcmd->device->lun;
if (!(flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR)) {
if (acb->devstate[id][lun] == ARECA_RAID_GONE)
acb->devstate[id][lun] = ARECA_RAID_GOOD;
ccb->pcmd->result = DID_OK << 16;
arcmsr_ccb_complete(ccb, 1);
} else {
switch(ccb->arcmsr_cdb.DeviceStatus) {
case ARCMSR_DEV_SELECT_TIMEOUT: {
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_TIME_OUT << 16;
arcmsr_ccb_complete(ccb, 1);
}
break;
case ARCMSR_DEV_ABORTED:
case ARCMSR_DEV_INIT_FAIL: {
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_BAD_TARGET << 16;
arcmsr_ccb_complete(ccb, 1);
}
break;
case ARCMSR_DEV_CHECK_CONDITION: {
acb->devstate[id][lun] = ARECA_RAID_GOOD;
arcmsr_report_sense_info(ccb);
arcmsr_ccb_complete(ccb, 1);
}
break;
default:
printk(KERN_NOTICE
"arcmsr%d: scsi id=%d lun=%d"
" isr get command error done,"
"but got unknown DeviceStatus = 0x%x \n"
, acb->host->host_no
, id
, lun
, ccb->arcmsr_cdb.DeviceStatus);
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_NO_CONNECT << 16;
arcmsr_ccb_complete(ccb, 1);
break;
}
}
}/*drain reply FIFO*/
}
if (!(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT))
return IRQ_NONE;
return IRQ_HANDLED;
}
static void arcmsr_iop_parking(struct AdapterControlBlock *acb)
{
if (acb) {
/* stop adapter background rebuild */
if (acb->acb_flags & ACB_F_MSG_START_BGRB) {
acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
arcmsr_stop_adapter_bgrb(acb);
arcmsr_flush_adapter_cache(acb);
}
}
}
static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_cmnd *cmd)
{
struct MessageUnit __iomem *reg = acb->pmu;
struct CMD_MESSAGE_FIELD *pcmdmessagefld;
int retvalue = 0, transfer_len = 0;
char *buffer;
uint32_t controlcode = (uint32_t ) cmd->cmnd[5] << 24 |
(uint32_t ) cmd->cmnd[6] << 16 |
(uint32_t ) cmd->cmnd[7] << 8 |
(uint32_t ) cmd->cmnd[8];
/* 4 bytes: Areca io control code */
if (cmd->use_sg) {
struct scatterlist *sg = (struct scatterlist *)cmd->request_buffer;
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
if (cmd->use_sg > 1) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
transfer_len += sg->length;
} else {
buffer = cmd->request_buffer;
transfer_len = cmd->request_bufflen;
}
if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
pcmdmessagefld = (struct CMD_MESSAGE_FIELD *) buffer;
switch(controlcode) {
case ARCMSR_MESSAGE_READ_RQBUFFER: {
unsigned long *ver_addr;
dma_addr_t buf_handle;
uint8_t *pQbuffer, *ptmpQbuffer;
int32_t allxfer_len = 0;
ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
if (!ver_addr) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
ptmpQbuffer = (uint8_t *) ver_addr;
while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
&& (allxfer_len < 1031)) {
pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
memcpy(ptmpQbuffer, pQbuffer, 1);
acb->rqbuf_firstindex++;
acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
ptmpQbuffer++;
allxfer_len++;
}
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
struct QBUFFER __iomem * prbuffer = (struct QBUFFER __iomem *)
&reg->message_rbuffer;
uint8_t __iomem * iop_data = (uint8_t __iomem *)prbuffer->data;
int32_t iop_len;
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
iop_len = readl(&prbuffer->data_len);
while (iop_len > 0) {
acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
acb->rqbuf_lastindex++;
acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
iop_data++;
iop_len--;
}
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
&reg->inbound_doorbell);
}
memcpy(pcmdmessagefld->messagedatabuffer,
(uint8_t *)ver_addr, allxfer_len);
pcmdmessagefld->cmdmessage.Length = allxfer_len;
pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
}
break;
case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
unsigned long *ver_addr;
dma_addr_t buf_handle;
int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
uint8_t *pQbuffer, *ptmpuserbuffer;
ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
if (!ver_addr) {
retvalue = ARCMSR_MESSAGE_FAIL;
goto message_out;
}
ptmpuserbuffer = (uint8_t *)ver_addr;
user_len = pcmdmessagefld->cmdmessage.Length;
memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
wqbuf_lastindex = acb->wqbuf_lastindex;
wqbuf_firstindex = acb->wqbuf_firstindex;
if (wqbuf_lastindex != wqbuf_firstindex) {
struct SENSE_DATA *sensebuffer =
(struct SENSE_DATA *)cmd->sense_buffer;
arcmsr_post_Qbuffer(acb);
/* has error report sensedata */
sensebuffer->ErrorCode = 0x70;
sensebuffer->SenseKey = ILLEGAL_REQUEST;
sensebuffer->AdditionalSenseLength = 0x0A;
sensebuffer->AdditionalSenseCode = 0x20;
sensebuffer->Valid = 1;
retvalue = ARCMSR_MESSAGE_FAIL;
} else {
my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
&(ARCMSR_MAX_QBUFFER - 1);
if (my_empty_len >= user_len) {
while (user_len > 0) {
pQbuffer =
&acb->wqbuffer[acb->wqbuf_lastindex];
memcpy(pQbuffer, ptmpuserbuffer, 1);
acb->wqbuf_lastindex++;
acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
ptmpuserbuffer++;
user_len--;
}
if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
acb->acb_flags &=
~ACB_F_MESSAGE_WQBUFFER_CLEARED;
arcmsr_post_Qbuffer(acb);
}
} else {
/* has error report sensedata */
struct SENSE_DATA *sensebuffer =
(struct SENSE_DATA *)cmd->sense_buffer;
sensebuffer->ErrorCode = 0x70;
sensebuffer->SenseKey = ILLEGAL_REQUEST;
sensebuffer->AdditionalSenseLength = 0x0A;
sensebuffer->AdditionalSenseCode = 0x20;
sensebuffer->Valid = 1;
retvalue = ARCMSR_MESSAGE_FAIL;
}
}
pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
}
break;
case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
uint8_t *pQbuffer = acb->rqbuffer;
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK,
&reg->inbound_doorbell);
}
acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
acb->rqbuf_firstindex = 0;
acb->rqbuf_lastindex = 0;
memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
pcmdmessagefld->cmdmessage.ReturnCode =
ARCMSR_MESSAGE_RETURNCODE_OK;
}
break;
case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
uint8_t *pQbuffer = acb->wqbuffer;
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
, &reg->inbound_doorbell);
}
acb->acb_flags |=
(ACB_F_MESSAGE_WQBUFFER_CLEARED |
ACB_F_MESSAGE_WQBUFFER_READED);
acb->wqbuf_firstindex = 0;
acb->wqbuf_lastindex = 0;
memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
pcmdmessagefld->cmdmessage.ReturnCode =
ARCMSR_MESSAGE_RETURNCODE_OK;
}
break;
case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
uint8_t *pQbuffer;
if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK
, &reg->inbound_doorbell);
}
acb->acb_flags |=
(ACB_F_MESSAGE_WQBUFFER_CLEARED
| ACB_F_MESSAGE_RQBUFFER_CLEARED
| ACB_F_MESSAGE_WQBUFFER_READED);
acb->rqbuf_firstindex = 0;
acb->rqbuf_lastindex = 0;
acb->wqbuf_firstindex = 0;
acb->wqbuf_lastindex = 0;
pQbuffer = acb->rqbuffer;
memset(pQbuffer, 0, sizeof (struct QBUFFER));
pQbuffer = acb->wqbuffer;
memset(pQbuffer, 0, sizeof (struct QBUFFER));
pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
}
break;
case ARCMSR_MESSAGE_RETURN_CODE_3F: {
pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_3F;
}
break;
case ARCMSR_MESSAGE_SAY_HELLO: {
int8_t * hello_string = "Hello! I am ARCMSR";
memcpy(pcmdmessagefld->messagedatabuffer, hello_string
, (int16_t)strlen(hello_string));
pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
}
break;
case ARCMSR_MESSAGE_SAY_GOODBYE:
arcmsr_iop_parking(acb);
break;
case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE:
arcmsr_flush_adapter_cache(acb);
break;
default:
retvalue = ARCMSR_MESSAGE_FAIL;
}
message_out:
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
}
return retvalue;
}
static struct CommandControlBlock *arcmsr_get_freeccb(struct AdapterControlBlock *acb)
{
struct list_head *head = &acb->ccb_free_list;
struct CommandControlBlock *ccb = NULL;
if (!list_empty(head)) {
ccb = list_entry(head->next, struct CommandControlBlock, list);
list_del(head->next);
}
return ccb;
}
static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
struct scsi_cmnd *cmd)
{
switch (cmd->cmnd[0]) {
case INQUIRY: {
unsigned char inqdata[36];
char *buffer;
if (cmd->device->lun) {
cmd->result = (DID_TIME_OUT << 16);
cmd->scsi_done(cmd);
return;
}
inqdata[0] = TYPE_PROCESSOR;
/* Periph Qualifier & Periph Dev Type */
inqdata[1] = 0;
/* rem media bit & Dev Type Modifier */
inqdata[2] = 0;
/* ISO,ECMA,& ANSI versions */
inqdata[4] = 31;
/* length of additional data */
strncpy(&inqdata[8], "Areca ", 8);
/* Vendor Identification */
strncpy(&inqdata[16], "RAID controller ", 16);
/* Product Identification */
strncpy(&inqdata[32], "R001", 4); /* Product Revision */
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
buffer = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
} else {
buffer = cmd->request_buffer;
}
memcpy(buffer, inqdata, sizeof(inqdata));
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buffer - sg->offset, KM_IRQ0);
}
cmd->scsi_done(cmd);
}
break;
case WRITE_BUFFER:
case READ_BUFFER: {
if (arcmsr_iop_message_xfer(acb, cmd))
cmd->result = (DID_ERROR << 16);
cmd->scsi_done(cmd);
}
break;
default:
cmd->scsi_done(cmd);
}
}
static int arcmsr_queue_command(struct scsi_cmnd *cmd,
void (* done)(struct scsi_cmnd *))
{
struct Scsi_Host *host = cmd->device->host;
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
struct CommandControlBlock *ccb;
int target = cmd->device->id;
int lun = cmd->device->lun;
cmd->scsi_done = done;
cmd->host_scribble = NULL;
cmd->result = 0;
if (acb->acb_flags & ACB_F_BUS_RESET) {
printk(KERN_NOTICE "arcmsr%d: bus reset"
" and return busy \n"
, acb->host->host_no);
return SCSI_MLQUEUE_HOST_BUSY;
}
if(target == 16) {
/* virtual device for iop message transfer */
arcmsr_handle_virtual_command(acb, cmd);
return 0;
}
if (acb->devstate[target][lun] == ARECA_RAID_GONE) {
uint8_t block_cmd;
block_cmd = cmd->cmnd[0] & 0x0f;
if (block_cmd == 0x08 || block_cmd == 0x0a) {
printk(KERN_NOTICE
"arcmsr%d: block 'read/write'"
"command with gone raid volume"
" Cmd=%2x, TargetId=%d, Lun=%d \n"
, acb->host->host_no
, cmd->cmnd[0]
, target, lun);
cmd->result = (DID_NO_CONNECT << 16);
cmd->scsi_done(cmd);
return 0;
}
}
if (atomic_read(&acb->ccboutstandingcount) >=
ARCMSR_MAX_OUTSTANDING_CMD)
return SCSI_MLQUEUE_HOST_BUSY;
ccb = arcmsr_get_freeccb(acb);
if (!ccb)
return SCSI_MLQUEUE_HOST_BUSY;
arcmsr_build_ccb(acb, ccb, cmd);
arcmsr_post_ccb(acb, ccb);
return 0;
}
static void arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
char *acb_firm_model = acb->firm_model;
char *acb_firm_version = acb->firm_version;
char __iomem *iop_firm_model = (char __iomem *) &reg->message_rwbuffer[15];
char __iomem *iop_firm_version = (char __iomem *) &reg->message_rwbuffer[17];
int count;
writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb))
printk(KERN_NOTICE
"arcmsr%d: wait "
"'get adapter firmware miscellaneous data' timeout \n"
, acb->host->host_no);
count = 8;
while (count) {
*acb_firm_model = readb(iop_firm_model);
acb_firm_model++;
iop_firm_model++;
count--;
}
count = 16;
while (count) {
*acb_firm_version = readb(iop_firm_version);
acb_firm_version++;
iop_firm_version++;
count--;
}
printk(KERN_INFO
"ARECA RAID ADAPTER%d: FIRMWARE VERSION %s \n"
, acb->host->host_no
, acb->firm_version);
acb->firm_request_len = readl(&reg->message_rwbuffer[1]);
acb->firm_numbers_queue = readl(&reg->message_rwbuffer[2]);
acb->firm_sdram_size = readl(&reg->message_rwbuffer[3]);
acb->firm_hd_channels = readl(&reg->message_rwbuffer[4]);
}
static void arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
struct CommandControlBlock *poll_ccb)
{
struct MessageUnit __iomem *reg = acb->pmu;
struct CommandControlBlock *ccb;
uint32_t flag_ccb, outbound_intstatus, poll_ccb_done = 0, poll_count = 0;
int id, lun;
polling_ccb_retry:
poll_count++;
outbound_intstatus = readl(&reg->outbound_intstatus)
& acb->outbound_int_enable;
writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
while (1) {
if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF) {
if (poll_ccb_done)
break;
else {
msleep(25);
if (poll_count > 100)
break;
goto polling_ccb_retry;
}
}
ccb = (struct CommandControlBlock *)
(acb->vir2phy_offset + (flag_ccb << 5));
if ((ccb->acb != acb) ||
(ccb->startdone != ARCMSR_CCB_START)) {
if ((ccb->startdone == ARCMSR_CCB_ABORTED) ||
(ccb == poll_ccb)) {
printk(KERN_NOTICE
"arcmsr%d: scsi id=%d lun=%d ccb='0x%p'"
" poll command abort successfully \n"
, acb->host->host_no
, ccb->pcmd->device->id
, ccb->pcmd->device->lun
, ccb);
ccb->pcmd->result = DID_ABORT << 16;
arcmsr_ccb_complete(ccb, 1);
poll_ccb_done = 1;
continue;
}
printk(KERN_NOTICE
"arcmsr%d: polling get an illegal ccb"
" command done ccb='0x%p'"
"ccboutstandingcount=%d \n"
, acb->host->host_no
, ccb
, atomic_read(&acb->ccboutstandingcount));
continue;
}
id = ccb->pcmd->device->id;
lun = ccb->pcmd->device->lun;
if (!(flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR)) {
if (acb->devstate[id][lun] == ARECA_RAID_GONE)
acb->devstate[id][lun] = ARECA_RAID_GOOD;
ccb->pcmd->result = DID_OK << 16;
arcmsr_ccb_complete(ccb, 1);
} else {
switch(ccb->arcmsr_cdb.DeviceStatus) {
case ARCMSR_DEV_SELECT_TIMEOUT: {
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_TIME_OUT << 16;
arcmsr_ccb_complete(ccb, 1);
}
break;
case ARCMSR_DEV_ABORTED:
case ARCMSR_DEV_INIT_FAIL: {
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_BAD_TARGET << 16;
arcmsr_ccb_complete(ccb, 1);
}
break;
case ARCMSR_DEV_CHECK_CONDITION: {
acb->devstate[id][lun] = ARECA_RAID_GOOD;
arcmsr_report_sense_info(ccb);
arcmsr_ccb_complete(ccb, 1);
}
break;
default:
printk(KERN_NOTICE
"arcmsr%d: scsi id=%d lun=%d"
" polling and getting command error done"
"but got unknown DeviceStatus = 0x%x \n"
, acb->host->host_no
, id
, lun
, ccb->arcmsr_cdb.DeviceStatus);
acb->devstate[id][lun] = ARECA_RAID_GONE;
ccb->pcmd->result = DID_BAD_TARGET << 16;
arcmsr_ccb_complete(ccb, 1);
break;
}
}
}
}
static void arcmsr_iop_init(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
uint32_t intmask_org, mask, outbound_doorbell, firmware_state = 0;
do {
firmware_state = readl(&reg->outbound_msgaddr1);
} while (!(firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK));
intmask_org = readl(&reg->outbound_intmask)
| ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE;
arcmsr_get_firmware_spec(acb);
acb->acb_flags |= ACB_F_MSG_START_BGRB;
writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
if (arcmsr_wait_msgint_ready(acb)) {
printk(KERN_NOTICE "arcmsr%d: "
"wait 'start adapter background rebulid' timeout\n",
acb->host->host_no);
}
outbound_doorbell = readl(&reg->outbound_doorbell);
writel(outbound_doorbell, &reg->outbound_doorbell);
writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
mask = ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE
| ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
writel(intmask_org & mask, &reg->outbound_intmask);
acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
acb->acb_flags |= ACB_F_IOP_INITED;
}
static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
{
struct MessageUnit __iomem *reg = acb->pmu;
struct CommandControlBlock *ccb;
uint32_t intmask_org;
int i = 0;
if (atomic_read(&acb->ccboutstandingcount) != 0) {
/* talk to iop 331 outstanding command aborted */
arcmsr_abort_allcmd(acb);
/* wait for 3 sec for all command aborted*/
msleep_interruptible(3000);
/* disable all outbound interrupt */
intmask_org = arcmsr_disable_outbound_ints(acb);
/* clear all outbound posted Q */
for (i = 0; i < ARCMSR_MAX_OUTSTANDING_CMD; i++)
readl(&reg->outbound_queueport);
for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
ccb = acb->pccb_pool[i];
if ((ccb->startdone == ARCMSR_CCB_START) ||
(ccb->startdone == ARCMSR_CCB_ABORTED)) {
ccb->startdone = ARCMSR_CCB_ABORTED;
ccb->pcmd->result = DID_ABORT << 16;
arcmsr_ccb_complete(ccb, 1);
}
}
/* enable all outbound interrupt */
arcmsr_enable_outbound_ints(acb, intmask_org);
}
atomic_set(&acb->ccboutstandingcount, 0);
}
static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
{
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *)cmd->device->host->hostdata;
int i;
acb->num_resets++;
acb->acb_flags |= ACB_F_BUS_RESET;
for (i = 0; i < 400; i++) {
if (!atomic_read(&acb->ccboutstandingcount))
break;
arcmsr_interrupt(acb);
msleep(25);
}
arcmsr_iop_reset(acb);
acb->acb_flags &= ~ACB_F_BUS_RESET;
return SUCCESS;
}
static void arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
struct CommandControlBlock *ccb)
{
u32 intmask;
ccb->startdone = ARCMSR_CCB_ABORTED;
/*
** Wait for 3 sec for all command done.
*/
msleep_interruptible(3000);
intmask = arcmsr_disable_outbound_ints(acb);
arcmsr_polling_ccbdone(acb, ccb);
arcmsr_enable_outbound_ints(acb, intmask);
}
static int arcmsr_abort(struct scsi_cmnd *cmd)
{
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *)cmd->device->host->hostdata;
int i = 0;
printk(KERN_NOTICE
"arcmsr%d: abort device command of scsi id=%d lun=%d \n",
acb->host->host_no, cmd->device->id, cmd->device->lun);
acb->num_aborts++;
/*
************************************************
** the all interrupt service routine is locked
** we need to handle it as soon as possible and exit
************************************************
*/
if (!atomic_read(&acb->ccboutstandingcount))
return SUCCESS;
for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
struct CommandControlBlock *ccb = acb->pccb_pool[i];
if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
arcmsr_abort_one_cmd(acb, ccb);
break;
}
}
return SUCCESS;
}
static const char *arcmsr_info(struct Scsi_Host *host)
{
struct AdapterControlBlock *acb =
(struct AdapterControlBlock *) host->hostdata;
static char buf[256];
char *type;
int raid6 = 1;
switch (acb->pdev->device) {
case PCI_DEVICE_ID_ARECA_1110:
case PCI_DEVICE_ID_ARECA_1210:
raid6 = 0;
/*FALLTHRU*/
case PCI_DEVICE_ID_ARECA_1120:
case PCI_DEVICE_ID_ARECA_1130:
case PCI_DEVICE_ID_ARECA_1160:
case PCI_DEVICE_ID_ARECA_1170:
case PCI_DEVICE_ID_ARECA_1220:
case PCI_DEVICE_ID_ARECA_1230:
case PCI_DEVICE_ID_ARECA_1260:
case PCI_DEVICE_ID_ARECA_1270:
case PCI_DEVICE_ID_ARECA_1280:
type = "SATA";
break;
case PCI_DEVICE_ID_ARECA_1380:
case PCI_DEVICE_ID_ARECA_1381:
case PCI_DEVICE_ID_ARECA_1680:
case PCI_DEVICE_ID_ARECA_1681:
type = "SAS";
break;
default:
type = "X-TYPE";
break;
}
sprintf(buf, "Areca %s Host Adapter RAID Controller%s\n %s",
type, raid6 ? "( RAID6 capable)" : "",
ARCMSR_DRIVER_VERSION);
return buf;
}
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