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cpqarray.c
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cpqarray.c
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/*
* Disk Array driver for Compaq SMART2 Controllers
* Copyright 1998 Compaq Computer 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.
*
* 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, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Questions/Comments/Bugfixes to [email protected]
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/bio.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/blkpg.h>
#include <linux/timer.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/hdreg.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#define SMART2_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
#define DRIVER_NAME "Compaq SMART2 Driver (v 2.6.0)"
#define DRIVER_VERSION SMART2_DRIVER_VERSION(2,6,0)
/* Embedded module documentation macros - see modules.h */
/* Original author Chris Frantz - Compaq Computer Corporation */
MODULE_AUTHOR("Compaq Computer Corporation");
MODULE_DESCRIPTION("Driver for Compaq Smart2 Array Controllers version 2.6.0");
MODULE_LICENSE("GPL");
#include "cpqarray.h"
#include "ida_cmd.h"
#include "smart1,2.h"
#include "ida_ioctl.h"
#define READ_AHEAD 128
#define NR_CMDS 128 /* This could probably go as high as ~400 */
#define MAX_CTLR 8
#define CTLR_SHIFT 8
#define CPQARRAY_DMA_MASK 0xFFFFFFFF /* 32 bit DMA */
static int nr_ctlr;
static ctlr_info_t *hba[MAX_CTLR];
static int eisa[8];
#define NR_PRODUCTS ARRAY_SIZE(products)
/* board_id = Subsystem Device ID & Vendor ID
* product = Marketing Name for the board
* access = Address of the struct of function pointers
*/
static struct board_type products[] = {
{ 0x0040110E, "IDA", &smart1_access },
{ 0x0140110E, "IDA-2", &smart1_access },
{ 0x1040110E, "IAES", &smart1_access },
{ 0x2040110E, "SMART", &smart1_access },
{ 0x3040110E, "SMART-2/E", &smart2e_access },
{ 0x40300E11, "SMART-2/P", &smart2_access },
{ 0x40310E11, "SMART-2SL", &smart2_access },
{ 0x40320E11, "Smart Array 3200", &smart2_access },
{ 0x40330E11, "Smart Array 3100ES", &smart2_access },
{ 0x40340E11, "Smart Array 221", &smart2_access },
{ 0x40400E11, "Integrated Array", &smart4_access },
{ 0x40480E11, "Compaq Raid LC2", &smart4_access },
{ 0x40500E11, "Smart Array 4200", &smart4_access },
{ 0x40510E11, "Smart Array 4250ES", &smart4_access },
{ 0x40580E11, "Smart Array 431", &smart4_access },
};
/* define the PCI info for the PCI cards this driver can control */
static const struct pci_device_id cpqarray_pci_device_id[] =
{
{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
0x0E11, 0x4058, 0, 0, 0}, /* SA431 */
{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
0x0E11, 0x4051, 0, 0, 0}, /* SA4250ES */
{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_COMPAQ_42XX,
0x0E11, 0x4050, 0, 0, 0}, /* SA4200 */
{ PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
0x0E11, 0x4048, 0, 0, 0}, /* LC2 */
{ PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C1510,
0x0E11, 0x4040, 0, 0, 0}, /* Integrated Array */
{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
0x0E11, 0x4034, 0, 0, 0}, /* SA 221 */
{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
0x0E11, 0x4033, 0, 0, 0}, /* SA 3100ES*/
{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
0x0E11, 0x4032, 0, 0, 0}, /* SA 3200*/
{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
0x0E11, 0x4031, 0, 0, 0}, /* SA 2SL*/
{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_SMART2P,
0x0E11, 0x4030, 0, 0, 0}, /* SA 2P */
{ 0 }
};
MODULE_DEVICE_TABLE(pci, cpqarray_pci_device_id);
static struct gendisk *ida_gendisk[MAX_CTLR][NWD];
/* Debug... */
#define DBG(s) do { s } while(0)
/* Debug (general info)... */
#define DBGINFO(s) do { } while(0)
/* Debug Paranoid... */
#define DBGP(s) do { } while(0)
/* Debug Extra Paranoid... */
#define DBGPX(s) do { } while(0)
static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev);
static void __iomem *remap_pci_mem(ulong base, ulong size);
static int cpqarray_eisa_detect(void);
static int pollcomplete(int ctlr);
static void getgeometry(int ctlr);
static void start_fwbk(int ctlr);
static cmdlist_t * cmd_alloc(ctlr_info_t *h, int get_from_pool);
static void cmd_free(ctlr_info_t *h, cmdlist_t *c, int got_from_pool);
static void free_hba(int i);
static int alloc_cpqarray_hba(void);
static int sendcmd(
__u8 cmd,
int ctlr,
void *buff,
size_t size,
unsigned int blk,
unsigned int blkcnt,
unsigned int log_unit );
static int ida_open(struct inode *inode, struct file *filep);
static int ida_release(struct inode *inode, struct file *filep);
static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, unsigned long arg);
static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
static void do_ida_request(request_queue_t *q);
static void start_io(ctlr_info_t *h);
static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c);
static inline void complete_buffers(struct bio *bio, int ok);
static inline void complete_command(cmdlist_t *cmd, int timeout);
static irqreturn_t do_ida_intr(int irq, void *dev_id);
static void ida_timer(unsigned long tdata);
static int ida_revalidate(struct gendisk *disk);
static int revalidate_allvol(ctlr_info_t *host);
static int cpqarray_register_ctlr(int ctlr, struct pci_dev *pdev);
#ifdef CONFIG_PROC_FS
static void ida_procinit(int i);
static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data);
#else
static void ida_procinit(int i) {}
#endif
static inline drv_info_t *get_drv(struct gendisk *disk)
{
return disk->private_data;
}
static inline ctlr_info_t *get_host(struct gendisk *disk)
{
return disk->queue->queuedata;
}
static struct block_device_operations ida_fops = {
.owner = THIS_MODULE,
.open = ida_open,
.release = ida_release,
.ioctl = ida_ioctl,
.getgeo = ida_getgeo,
.revalidate_disk= ida_revalidate,
};
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_array;
/*
* Get us a file in /proc/array that says something about each controller.
* Create /proc/array if it doesn't exist yet.
*/
static void __init ida_procinit(int i)
{
if (proc_array == NULL) {
proc_array = proc_mkdir("cpqarray", proc_root_driver);
if (!proc_array) return;
}
create_proc_read_entry(hba[i]->devname, 0, proc_array,
ida_proc_get_info, hba[i]);
}
/*
* Report information about this controller.
*/
static int ida_proc_get_info(char *buffer, char **start, off_t offset, int length, int *eof, void *data)
{
off_t pos = 0;
off_t len = 0;
int size, i, ctlr;
ctlr_info_t *h = (ctlr_info_t*)data;
drv_info_t *drv;
#ifdef CPQ_PROC_PRINT_QUEUES
cmdlist_t *c;
unsigned long flags;
#endif
ctlr = h->ctlr;
size = sprintf(buffer, "%s: Compaq %s Controller\n"
" Board ID: 0x%08lx\n"
" Firmware Revision: %c%c%c%c\n"
" Controller Sig: 0x%08lx\n"
" Memory Address: 0x%08lx\n"
" I/O Port: 0x%04x\n"
" IRQ: %d\n"
" Logical drives: %d\n"
" Physical drives: %d\n\n"
" Current Q depth: %d\n"
" Max Q depth since init: %d\n\n",
h->devname,
h->product_name,
(unsigned long)h->board_id,
h->firm_rev[0], h->firm_rev[1], h->firm_rev[2], h->firm_rev[3],
(unsigned long)h->ctlr_sig, (unsigned long)h->vaddr,
(unsigned int) h->io_mem_addr, (unsigned int)h->intr,
h->log_drives, h->phys_drives,
h->Qdepth, h->maxQsinceinit);
pos += size; len += size;
size = sprintf(buffer+len, "Logical Drive Info:\n");
pos += size; len += size;
for(i=0; i<h->log_drives; i++) {
drv = &h->drv[i];
size = sprintf(buffer+len, "ida/c%dd%d: blksz=%d nr_blks=%d\n",
ctlr, i, drv->blk_size, drv->nr_blks);
pos += size; len += size;
}
#ifdef CPQ_PROC_PRINT_QUEUES
spin_lock_irqsave(IDA_LOCK(h->ctlr), flags);
size = sprintf(buffer+len, "\nCurrent Queues:\n");
pos += size; len += size;
c = h->reqQ;
size = sprintf(buffer+len, "reqQ = %p", c); pos += size; len += size;
if (c) c=c->next;
while(c && c != h->reqQ) {
size = sprintf(buffer+len, "->%p", c);
pos += size; len += size;
c=c->next;
}
c = h->cmpQ;
size = sprintf(buffer+len, "\ncmpQ = %p", c); pos += size; len += size;
if (c) c=c->next;
while(c && c != h->cmpQ) {
size = sprintf(buffer+len, "->%p", c);
pos += size; len += size;
c=c->next;
}
size = sprintf(buffer+len, "\n"); pos += size; len += size;
spin_unlock_irqrestore(IDA_LOCK(h->ctlr), flags);
#endif
size = sprintf(buffer+len, "nr_allocs = %d\nnr_frees = %d\n",
h->nr_allocs, h->nr_frees);
pos += size; len += size;
*eof = 1;
*start = buffer+offset;
len -= offset;
if (len>length)
len = length;
return len;
}
#endif /* CONFIG_PROC_FS */
module_param_array(eisa, int, NULL, 0);
static void release_io_mem(ctlr_info_t *c)
{
/* if IO mem was not protected do nothing */
if( c->io_mem_addr == 0)
return;
release_region(c->io_mem_addr, c->io_mem_length);
c->io_mem_addr = 0;
c->io_mem_length = 0;
}
static void __devexit cpqarray_remove_one(int i)
{
int j;
char buff[4];
/* sendcmd will turn off interrupt, and send the flush...
* To write all data in the battery backed cache to disks
* no data returned, but don't want to send NULL to sendcmd */
if( sendcmd(FLUSH_CACHE, i, buff, 4, 0, 0, 0))
{
printk(KERN_WARNING "Unable to flush cache on controller %d\n",
i);
}
free_irq(hba[i]->intr, hba[i]);
iounmap(hba[i]->vaddr);
unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
del_timer(&hba[i]->timer);
remove_proc_entry(hba[i]->devname, proc_array);
pci_free_consistent(hba[i]->pci_dev,
NR_CMDS * sizeof(cmdlist_t), (hba[i]->cmd_pool),
hba[i]->cmd_pool_dhandle);
kfree(hba[i]->cmd_pool_bits);
for(j = 0; j < NWD; j++) {
if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
del_gendisk(ida_gendisk[i][j]);
put_disk(ida_gendisk[i][j]);
}
blk_cleanup_queue(hba[i]->queue);
release_io_mem(hba[i]);
free_hba(i);
}
static void __devexit cpqarray_remove_one_pci (struct pci_dev *pdev)
{
int i;
ctlr_info_t *tmp_ptr;
if (pci_get_drvdata(pdev) == NULL) {
printk( KERN_ERR "cpqarray: Unable to remove device \n");
return;
}
tmp_ptr = pci_get_drvdata(pdev);
i = tmp_ptr->ctlr;
if (hba[i] == NULL) {
printk(KERN_ERR "cpqarray: controller %d appears to have"
"already been removed \n", i);
return;
}
pci_set_drvdata(pdev, NULL);
cpqarray_remove_one(i);
}
/* removing an instance that was not removed automatically..
* must be an eisa card.
*/
static void __devexit cpqarray_remove_one_eisa (int i)
{
if (hba[i] == NULL) {
printk(KERN_ERR "cpqarray: controller %d appears to have"
"already been removed \n", i);
return;
}
cpqarray_remove_one(i);
}
/* pdev is NULL for eisa */
static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
{
request_queue_t *q;
int j;
/*
* register block devices
* Find disks and fill in structs
* Get an interrupt, set the Q depth and get into /proc
*/
/* If this successful it should insure that we are the only */
/* instance of the driver */
if (register_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname)) {
goto Enomem4;
}
hba[i]->access.set_intr_mask(hba[i], 0);
if (request_irq(hba[i]->intr, do_ida_intr,
IRQF_DISABLED|IRQF_SHARED, hba[i]->devname, hba[i]))
{
printk(KERN_ERR "cpqarray: Unable to get irq %d for %s\n",
hba[i]->intr, hba[i]->devname);
goto Enomem3;
}
for (j=0; j<NWD; j++) {
ida_gendisk[i][j] = alloc_disk(1 << NWD_SHIFT);
if (!ida_gendisk[i][j])
goto Enomem2;
}
hba[i]->cmd_pool = (cmdlist_t *)pci_alloc_consistent(
hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
&(hba[i]->cmd_pool_dhandle));
hba[i]->cmd_pool_bits = kmalloc(
((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long),
GFP_KERNEL);
if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
goto Enomem1;
memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
memset(hba[i]->cmd_pool_bits, 0, ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long));
printk(KERN_INFO "cpqarray: Finding drives on %s",
hba[i]->devname);
spin_lock_init(&hba[i]->lock);
q = blk_init_queue(do_ida_request, &hba[i]->lock);
if (!q)
goto Enomem1;
hba[i]->queue = q;
q->queuedata = hba[i];
getgeometry(i);
start_fwbk(i);
ida_procinit(i);
if (pdev)
blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
/* This is a hardware imposed limit. */
blk_queue_max_hw_segments(q, SG_MAX);
/* This is a driver limit and could be eliminated. */
blk_queue_max_phys_segments(q, SG_MAX);
init_timer(&hba[i]->timer);
hba[i]->timer.expires = jiffies + IDA_TIMER;
hba[i]->timer.data = (unsigned long)hba[i];
hba[i]->timer.function = ida_timer;
add_timer(&hba[i]->timer);
/* Enable IRQ now that spinlock and rate limit timer are set up */
hba[i]->access.set_intr_mask(hba[i], FIFO_NOT_EMPTY);
for(j=0; j<NWD; j++) {
struct gendisk *disk = ida_gendisk[i][j];
drv_info_t *drv = &hba[i]->drv[j];
sprintf(disk->disk_name, "ida/c%dd%d", i, j);
disk->major = COMPAQ_SMART2_MAJOR + i;
disk->first_minor = j<<NWD_SHIFT;
disk->fops = &ida_fops;
if (j && !drv->nr_blks)
continue;
blk_queue_hardsect_size(hba[i]->queue, drv->blk_size);
set_capacity(disk, drv->nr_blks);
disk->queue = hba[i]->queue;
disk->private_data = drv;
add_disk(disk);
}
/* done ! */
return(i);
Enomem1:
nr_ctlr = i;
kfree(hba[i]->cmd_pool_bits);
if (hba[i]->cmd_pool)
pci_free_consistent(hba[i]->pci_dev, NR_CMDS*sizeof(cmdlist_t),
hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
Enomem2:
while (j--) {
put_disk(ida_gendisk[i][j]);
ida_gendisk[i][j] = NULL;
}
free_irq(hba[i]->intr, hba[i]);
Enomem3:
unregister_blkdev(COMPAQ_SMART2_MAJOR+i, hba[i]->devname);
Enomem4:
if (pdev)
pci_set_drvdata(pdev, NULL);
release_io_mem(hba[i]);
free_hba(i);
printk( KERN_ERR "cpqarray: out of memory");
return -1;
}
static int __init cpqarray_init_one( struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int i;
printk(KERN_DEBUG "cpqarray: Device 0x%x has been found at"
" bus %d dev %d func %d\n",
pdev->device, pdev->bus->number, PCI_SLOT(pdev->devfn),
PCI_FUNC(pdev->devfn));
i = alloc_cpqarray_hba();
if( i < 0 )
return (-1);
memset(hba[i], 0, sizeof(ctlr_info_t));
sprintf(hba[i]->devname, "ida%d", i);
hba[i]->ctlr = i;
/* Initialize the pdev driver private data */
pci_set_drvdata(pdev, hba[i]);
if (cpqarray_pci_init(hba[i], pdev) != 0) {
pci_set_drvdata(pdev, NULL);
release_io_mem(hba[i]);
free_hba(i);
return -1;
}
return (cpqarray_register_ctlr(i, pdev));
}
static struct pci_driver cpqarray_pci_driver = {
.name = "cpqarray",
.probe = cpqarray_init_one,
.remove = __devexit_p(cpqarray_remove_one_pci),
.id_table = cpqarray_pci_device_id,
};
/*
* This is it. Find all the controllers and register them.
* returns the number of block devices registered.
*/
static int __init cpqarray_init(void)
{
int num_cntlrs_reg = 0;
int i;
int rc = 0;
/* detect controllers */
printk(DRIVER_NAME "\n");
rc = pci_register_driver(&cpqarray_pci_driver);
if (rc)
return rc;
cpqarray_eisa_detect();
for (i=0; i < MAX_CTLR; i++) {
if (hba[i] != NULL)
num_cntlrs_reg++;
}
return(num_cntlrs_reg);
}
/* Function to find the first free pointer into our hba[] array */
/* Returns -1 if no free entries are left. */
static int alloc_cpqarray_hba(void)
{
int i;
for(i=0; i< MAX_CTLR; i++) {
if (hba[i] == NULL) {
hba[i] = kmalloc(sizeof(ctlr_info_t), GFP_KERNEL);
if(hba[i]==NULL) {
printk(KERN_ERR "cpqarray: out of memory.\n");
return (-1);
}
return (i);
}
}
printk(KERN_WARNING "cpqarray: This driver supports a maximum"
" of 8 controllers.\n");
return(-1);
}
static void free_hba(int i)
{
kfree(hba[i]);
hba[i]=NULL;
}
/*
* Find the IO address of the controller, its IRQ and so forth. Fill
* in some basic stuff into the ctlr_info_t structure.
*/
static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
{
ushort vendor_id, device_id, command;
unchar cache_line_size, latency_timer;
unchar irq, revision;
unsigned long addr[6];
__u32 board_id;
int i;
c->pci_dev = pdev;
if (pci_enable_device(pdev)) {
printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
return -1;
}
vendor_id = pdev->vendor;
device_id = pdev->device;
irq = pdev->irq;
for(i=0; i<6; i++)
addr[i] = pci_resource_start(pdev, i);
if (pci_set_dma_mask(pdev, CPQARRAY_DMA_MASK) != 0)
{
printk(KERN_ERR "cpqarray: Unable to set DMA mask\n");
return -1;
}
pci_read_config_word(pdev, PCI_COMMAND, &command);
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
pci_read_config_dword(pdev, 0x2c, &board_id);
/* check to see if controller has been disabled */
if(!(command & 0x02)) {
printk(KERN_WARNING
"cpqarray: controller appears to be disabled\n");
return(-1);
}
DBGINFO(
printk("vendor_id = %x\n", vendor_id);
printk("device_id = %x\n", device_id);
printk("command = %x\n", command);
for(i=0; i<6; i++)
printk("addr[%d] = %lx\n", i, addr[i]);
printk("revision = %x\n", revision);
printk("irq = %x\n", irq);
printk("cache_line_size = %x\n", cache_line_size);
printk("latency_timer = %x\n", latency_timer);
printk("board_id = %x\n", board_id);
);
c->intr = irq;
for(i=0; i<6; i++) {
if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO)
{ /* IO space */
c->io_mem_addr = addr[i];
c->io_mem_length = pci_resource_end(pdev, i)
- pci_resource_start(pdev, i) + 1;
if(!request_region( c->io_mem_addr, c->io_mem_length,
"cpqarray"))
{
printk( KERN_WARNING "cpqarray I/O memory range already in use addr %lx length = %ld\n", c->io_mem_addr, c->io_mem_length);
c->io_mem_addr = 0;
c->io_mem_length = 0;
}
break;
}
}
c->paddr = 0;
for(i=0; i<6; i++)
if (!(pci_resource_flags(pdev, i) &
PCI_BASE_ADDRESS_SPACE_IO)) {
c->paddr = pci_resource_start (pdev, i);
break;
}
if (!c->paddr)
return -1;
c->vaddr = remap_pci_mem(c->paddr, 128);
if (!c->vaddr)
return -1;
c->board_id = board_id;
for(i=0; i<NR_PRODUCTS; i++) {
if (board_id == products[i].board_id) {
c->product_name = products[i].product_name;
c->access = *(products[i].access);
break;
}
}
if (i == NR_PRODUCTS) {
printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
" to access the SMART Array controller %08lx\n",
(unsigned long)board_id);
return -1;
}
return 0;
}
/*
* Map (physical) PCI mem into (virtual) kernel space
*/
static void __iomem *remap_pci_mem(ulong base, ulong size)
{
ulong page_base = ((ulong) base) & PAGE_MASK;
ulong page_offs = ((ulong) base) - page_base;
void __iomem *page_remapped = ioremap(page_base, page_offs+size);
return (page_remapped ? (page_remapped + page_offs) : NULL);
}
#ifndef MODULE
/*
* Config string is a comma separated set of i/o addresses of EISA cards.
*/
static int cpqarray_setup(char *str)
{
int i, ints[9];
(void)get_options(str, ARRAY_SIZE(ints), ints);
for(i=0; i<ints[0] && i<8; i++)
eisa[i] = ints[i+1];
return 1;
}
__setup("smart2=", cpqarray_setup);
#endif
/*
* Find an EISA controller's signature. Set up an hba if we find it.
*/
static int __init cpqarray_eisa_detect(void)
{
int i=0, j;
__u32 board_id;
int intr;
int ctlr;
int num_ctlr = 0;
while(i<8 && eisa[i]) {
ctlr = alloc_cpqarray_hba();
if(ctlr == -1)
break;
board_id = inl(eisa[i]+0xC80);
for(j=0; j < NR_PRODUCTS; j++)
if (board_id == products[j].board_id)
break;
if (j == NR_PRODUCTS) {
printk(KERN_WARNING "cpqarray: Sorry, I don't know how"
" to access the SMART Array controller %08lx\n", (unsigned long)board_id);
continue;
}
memset(hba[ctlr], 0, sizeof(ctlr_info_t));
hba[ctlr]->io_mem_addr = eisa[i];
hba[ctlr]->io_mem_length = 0x7FF;
if(!request_region(hba[ctlr]->io_mem_addr,
hba[ctlr]->io_mem_length,
"cpqarray"))
{
printk(KERN_WARNING "cpqarray: I/O range already in "
"use addr = %lx length = %ld\n",
hba[ctlr]->io_mem_addr,
hba[ctlr]->io_mem_length);
free_hba(ctlr);
continue;
}
/*
* Read the config register to find our interrupt
*/
intr = inb(eisa[i]+0xCC0) >> 4;
if (intr & 1) intr = 11;
else if (intr & 2) intr = 10;
else if (intr & 4) intr = 14;
else if (intr & 8) intr = 15;
hba[ctlr]->intr = intr;
sprintf(hba[ctlr]->devname, "ida%d", nr_ctlr);
hba[ctlr]->product_name = products[j].product_name;
hba[ctlr]->access = *(products[j].access);
hba[ctlr]->ctlr = ctlr;
hba[ctlr]->board_id = board_id;
hba[ctlr]->pci_dev = NULL; /* not PCI */
DBGINFO(
printk("i = %d, j = %d\n", i, j);
printk("irq = %x\n", intr);
printk("product name = %s\n", products[j].product_name);
printk("board_id = %x\n", board_id);
);
num_ctlr++;
i++;
if (cpqarray_register_ctlr(ctlr, NULL) == -1)
printk(KERN_WARNING
"cpqarray: Can't register EISA controller %d\n",
ctlr);
}
return num_ctlr;
}
/*
* Open. Make sure the device is really there.
*/
static int ida_open(struct inode *inode, struct file *filep)
{
drv_info_t *drv = get_drv(inode->i_bdev->bd_disk);
ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
DBGINFO(printk("ida_open %s\n", inode->i_bdev->bd_disk->disk_name));
/*
* Root is allowed to open raw volume zero even if it's not configured
* so array config can still work. I don't think I really like this,
* but I'm already using way to many device nodes to claim another one
* for "raw controller".
*/
if (!drv->nr_blks) {
if (!capable(CAP_SYS_RAWIO))
return -ENXIO;
if (!capable(CAP_SYS_ADMIN) && drv != host->drv)
return -ENXIO;
}
host->usage_count++;
return 0;
}
/*
* Close. Sync first.
*/
static int ida_release(struct inode *inode, struct file *filep)
{
ctlr_info_t *host = get_host(inode->i_bdev->bd_disk);
host->usage_count--;
return 0;
}
/*
* Enqueuing and dequeuing functions for cmdlists.
*/
static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c)
{
if (*Qptr == NULL) {
*Qptr = c;
c->next = c->prev = c;
} else {
c->prev = (*Qptr)->prev;
c->next = (*Qptr);
(*Qptr)->prev->next = c;
(*Qptr)->prev = c;
}
}
static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
{
if (c && c->next != c) {
if (*Qptr == c) *Qptr = c->next;
c->prev->next = c->next;
c->next->prev = c->prev;
} else {
*Qptr = NULL;
}
return c;
}
/*
* Get a request and submit it to the controller.
* This routine needs to grab all the requests it possibly can from the
* req Q and submit them. Interrupts are off (and need to be off) when you
* are in here (either via the dummy do_ida_request functions or by being
* called from the interrupt handler
*/
static void do_ida_request(request_queue_t *q)
{
ctlr_info_t *h = q->queuedata;
cmdlist_t *c;
struct request *creq;
struct scatterlist tmp_sg[SG_MAX];
int i, dir, seg;
if (blk_queue_plugged(q))
goto startio;
queue_next:
creq = elv_next_request(q);
if (!creq)
goto startio;
BUG_ON(creq->nr_phys_segments > SG_MAX);
if ((c = cmd_alloc(h,1)) == NULL)
goto startio;
blkdev_dequeue_request(creq);
c->ctlr = h->ctlr;
c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
c->hdr.size = sizeof(rblk_t) >> 2;
c->size += sizeof(rblk_t);
c->req.hdr.blk = creq->sector;
c->rq = creq;
DBGPX(
printk("sector=%d, nr_sectors=%d\n", creq->sector, creq->nr_sectors);
);
seg = blk_rq_map_sg(q, creq, tmp_sg);
/* Now do all the DMA Mappings */
if (rq_data_dir(creq) == READ)
dir = PCI_DMA_FROMDEVICE;
else
dir = PCI_DMA_TODEVICE;
for( i=0; i < seg; i++)
{
c->req.sg[i].size = tmp_sg[i].length;
c->req.sg[i].addr = (__u32) pci_map_page(h->pci_dev,
tmp_sg[i].page,
tmp_sg[i].offset,
tmp_sg[i].length, dir);
}
DBGPX( printk("Submitting %d sectors in %d segments\n", creq->nr_sectors, seg); );
c->req.hdr.sg_cnt = seg;
c->req.hdr.blk_cnt = creq->nr_sectors;
c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
c->type = CMD_RWREQ;
/* Put the request on the tail of the request queue */
addQ(&h->reqQ, c);
h->Qdepth++;
if (h->Qdepth > h->maxQsinceinit)
h->maxQsinceinit = h->Qdepth;
goto queue_next;
startio:
start_io(h);
}
/*
* start_io submits everything on a controller's request queue
* and moves it to the completion queue.
*
* Interrupts had better be off if you're in here
*/
static void start_io(ctlr_info_t *h)
{
cmdlist_t *c;
while((c = h->reqQ) != NULL) {
/* Can't do anything if we're busy */
if (h->access.fifo_full(h) == 0)
return;
/* Get the first entry from the request Q */
removeQ(&h->reqQ, c);
h->Qdepth--;
/* Tell the controller to do our bidding */
h->access.submit_command(h, c);
/* Get onto the completion Q */
addQ(&h->cmpQ, c);
}
}
static inline void complete_buffers(struct bio *bio, int ok)
{
struct bio *xbh;
while(bio) {
int nr_sectors = bio_sectors(bio);
xbh = bio->bi_next;
bio->bi_next = NULL;
bio_endio(bio, nr_sectors << 9, ok ? 0 : -EIO);
bio = xbh;
}
}
/*
* Mark all buffers that cmd was responsible for
*/
static inline void complete_command(cmdlist_t *cmd, int timeout)
{