* HPT370 Raid - SPAN&RAID1 Patch
@ 2003-04-14 20:18 Wilfried Weissmann
0 siblings, 0 replies; only message in thread
From: Wilfried Weissmann @ 2003-04-14 20:18 UTC (permalink / raw)
To: Kernel Mailing List; +Cc: Arjan van de Ven
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Greetings HPT370 owners,
After I messed up my harddisk I had no more reasons for not doing some
work on the raid implementation. So here is an update that does the
disk-spanning and raid1 (sorry, no real redundancy implemented yet, just
clone of pdcraid1). It also correct the total sector length (round down
to 1k blocks). The patch applies against linux-2.4.21-pre7. The PCI-ID
of HPT372N is also added so that HPT[67]X supports compiles. Enjoy...
bye,
Wilfried
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Index: linux/drivers/ide/raid/hptraid.c
===================================================================
RCS file: /home/rayn/src/cvsroot/linux/drivers/ide/raid/Attic/hptraid.c,v
retrieving revision 1.1.2.1
retrieving revision 1.1.2.1.6.2
diff -a -u -r1.1.2.1 -r1.1.2.1.6.2
--- linux/drivers/ide/raid/hptraid.c 12 Apr 2003 21:57:31 -0000 1.1.2.1
+++ linux/drivers/ide/raid/hptraid.c 14 Apr 2003 19:37:52 -0000 1.1.2.1.6.2
@@ -38,7 +38,9 @@
static int hptraid_open(struct inode * inode, struct file * filp);
static int hptraid_release(struct inode * inode, struct file * filp);
static int hptraid_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
-static int hptraid_make_request (request_queue_t *q, int rw, struct buffer_head * bh);
+static int hptraidspan_make_request (request_queue_t *q, int rw, struct buffer_head * bh);
+static int hptraid0_make_request (request_queue_t *q, int rw, struct buffer_head * bh);
+static int hptraid1_make_request (request_queue_t *q, int rw, struct buffer_head * bh);
@@ -46,28 +48,68 @@
kdev_t device;
unsigned long sectors;
struct block_device *bdev;
+ unsigned long last_pos;
};
struct hptraid {
unsigned int stride;
unsigned int disks;
unsigned long sectors;
+ u_int32_t magic_0;
struct geom geom;
struct hptdisk disk[8];
-
unsigned long cutoff[8];
unsigned int cutoff_disks[8];
};
-static struct raid_device_operations hptraid_ops = {
+struct hptraid_dev {
+ int major;
+ int minor;
+ int device;
+};
+
+static struct hptraid_dev devlist[]=
+{
+
+ {IDE0_MAJOR, 0, -1},
+ {IDE0_MAJOR, 64, -1},
+ {IDE1_MAJOR, 0, -1},
+ {IDE1_MAJOR, 64, -1},
+ {IDE2_MAJOR, 0, -1},
+ {IDE2_MAJOR, 64, -1},
+ {IDE3_MAJOR, 0, -1},
+ {IDE3_MAJOR, 64, -1},
+ {IDE4_MAJOR, 0, -1},
+ {IDE4_MAJOR, 64, -1},
+ {IDE5_MAJOR, 0, -1},
+ {IDE5_MAJOR, 64, -1},
+ {IDE6_MAJOR, 0, -1},
+ {IDE6_MAJOR, 64, -1}
+};
+
+static struct raid_device_operations hptraidspan_ops = {
+ open: hptraid_open,
+ release: hptraid_release,
+ ioctl: hptraid_ioctl,
+ make_request: hptraidspan_make_request
+};
+
+static struct raid_device_operations hptraid0_ops = {
+ open: hptraid_open,
+ release: hptraid_release,
+ ioctl: hptraid_ioctl,
+ make_request: hptraid0_make_request
+};
+
+static struct raid_device_operations hptraid1_ops = {
open: hptraid_open,
release: hptraid_release,
ioctl: hptraid_ioctl,
- make_request: hptraid_make_request
+ make_request: hptraid1_make_request
};
-static struct hptraid raid[16];
+static struct hptraid raid[14];
static int hptraid_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
@@ -131,7 +173,50 @@
}
-static int hptraid_make_request (request_queue_t *q, int rw, struct buffer_head * bh)
+static int hptraidspan_make_request (request_queue_t *q, int rw, struct buffer_head * bh)
+{
+ unsigned long rsect;
+ unsigned int disk;
+ int device;
+ struct hptraid *thisraid;
+
+ rsect = bh->b_rsector;
+
+ device = (bh->b_rdev >> SHIFT)&MAJOR_MASK;
+ thisraid = &raid[device];
+
+ /* Partitions need adding of the start sector of the partition to the requested sector */
+
+ rsect += ataraid_gendisk.part[MINOR(bh->b_rdev)].start_sect;
+
+ for (disk=0;disk<thisraid->disks;disk++) {
+ if (disk==1)
+ rsect+=10;
+ // the "on next disk" contition check is a bit odd
+ if (thisraid->disk[disk].sectors > rsect+1)
+ break;
+ rsect-=thisraid->disk[disk].sectors-(disk?11:1);
+ }
+
+ // request spans over 2 disks => request must be split
+ if(rsect+bh->b_size/512 >= thisraid->disk[disk].sectors)
+ return -1;
+
+ /*
+ * The new BH_Lock semantics in ll_rw_blk.c guarantee that this
+ * is the only IO operation happening on this bh.
+ */
+
+ bh->b_rdev = thisraid->disk[disk].device;
+ bh->b_rsector = rsect;
+
+ /*
+ * Let the main block layer submit the IO and resolve recursion:
+ */
+ return 1;
+}
+
+static int hptraid0_make_request (request_queue_t *q, int rw, struct buffer_head * bh)
{
unsigned long rsect;
unsigned long rsect_left,rsect_accum = 0;
@@ -218,6 +303,106 @@
return 1;
}
+static int hptraid1_read_request (request_queue_t *q, int rw, struct buffer_head * bh)
+{
+ int device;
+ int dist;
+ int bestsofar,bestdist,i;
+ static int previous;
+
+ /* Reads are simple in principle. Pick a disk and go.
+ Initially I cheat by just picking the one which the last known
+ head position is closest by.
+ Later on, online/offline checking and performance needs adding */
+
+ device = (bh->b_rdev >> SHIFT)&MAJOR_MASK;
+ bh->b_rsector += ataraid_gendisk.part[MINOR(bh->b_rdev)].start_sect;
+
+ bestsofar = 0;
+ bestdist = raid[device].disk[0].last_pos - bh->b_rsector;
+ if (bestdist<0)
+ bestdist=-bestdist;
+ if (bestdist>4095)
+ bestdist=4095;
+
+ for (i=1 ; i<raid[device].disks; i++) {
+ dist = raid[device].disk[i].last_pos - bh->b_rsector;
+ if (dist<0)
+ dist = -dist;
+ if (dist>4095)
+ dist=4095;
+
+ if (bestdist==dist) { /* it's a tie; try to do some read balancing */
+ if ((previous>bestsofar)&&(previous<=i))
+ bestsofar = i;
+ previous = (previous + 1) % raid[device].disks;
+ } else if (bestdist>dist) {
+ bestdist = dist;
+ bestsofar = i;
+ }
+
+ }
+
+ bh->b_rsector += bestsofar?10:0;
+ bh->b_rdev = raid[device].disk[bestsofar].device;
+ raid[device].disk[bestsofar].last_pos = bh->b_rsector+(bh->b_size>>9);
+
+ /*
+ * Let the main block layer submit the IO and resolve recursion:
+ */
+
+ return 1;
+}
+
+static int hptraid1_write_request(request_queue_t *q, int rw, struct buffer_head * bh)
+{
+ struct buffer_head *bh1;
+ struct ataraid_bh_private *private;
+ int device;
+ int i;
+
+ device = (bh->b_rdev >> SHIFT)&MAJOR_MASK;
+ private = ataraid_get_private();
+ if (private==NULL)
+ BUG();
+
+ private->parent = bh;
+
+ atomic_set(&private->count,raid[device].disks);
+
+
+ for (i = 0; i< raid[device].disks; i++) {
+ bh1=ataraid_get_bhead();
+ /* If this ever fails we're doomed */
+ if (!bh1)
+ BUG();
+
+ /* dupe the bufferhead and update the parts that need to be different */
+ memcpy(bh1, bh, sizeof(*bh));
+
+ bh1->b_end_io = ataraid_end_request;
+ bh1->b_private = private;
+ bh1->b_rsector += ataraid_gendisk.part[MINOR(bh->b_rdev)].start_sect+(i==0?0:10); /* partition offset */
+ bh1->b_rdev = raid[device].disk[i].device;
+
+ /* update the last known head position for the drive */
+ raid[device].disk[i].last_pos = bh1->b_rsector+(bh1->b_size>>9);
+
+ generic_make_request(rw,bh1);
+ }
+ return 0;
+}
+
+static int hptraid1_make_request (request_queue_t *q, int rw, struct buffer_head * bh) {
+ /* Read and Write are totally different cases; split them totally here */
+ if (rw==READA)
+ rw = READ;
+
+ if (rw==READ)
+ return hptraid1_read_request(q,rw,bh);
+ else
+ return hptraid1_write_request(q,rw,bh);
+}
#include "hptraid.h"
@@ -271,35 +456,49 @@
return lba;
}
-static void __init probedisk(int major, int minor,int device)
+static void __init probedisk(struct hptraid_dev *disk, int device, u_int8_t type)
{
int i;
struct highpoint_raid_conf *prom;
static unsigned char block[4096];
struct block_device *bdev;
- if (maxsectors(major,minor)==0)
+ if (disk->device != -1) /* disk is occupied? */
+ return;
+
+ if (maxsectors(disk->major,disk->minor)==0)
return;
- if (read_disk_sb(major,minor,(unsigned char*)&block,sizeof(block)))
+ if (read_disk_sb(disk->major,disk->minor,(unsigned char*)&block,sizeof(block)))
return;
prom = (struct highpoint_raid_conf*)&block[512];
if (prom->magic!= 0x5a7816f0)
return;
- if (prom->type) {
- printk(KERN_INFO "hptraid: only RAID0 is supported currently\n");
- return;
+ switch (prom->type) {
+ case HPT_T_SPAN:
+ case HPT_T_RAID_0:
+ case HPT_T_RAID_1:
+ if(prom->type != type)
+ return;
+ break;
+ default:
+ printk(KERN_INFO "hptraid: only SPAN, RAID0 and RAID1 is currently supported \n");
+ return;
}
+ /* disk from another array? */
+ if(raid[device].disks && prom->magic_0 != raid[device].magic_0)
+ return;
+
i = prom->disk_number;
if (i<0)
return;
if (i>8)
return;
- bdev = bdget(MKDEV(major,minor));
+ bdev = bdget(MKDEV(disk->major,disk->minor));
if (bdev && blkdev_get(bdev,FMODE_READ|FMODE_WRITE,0,BDEV_RAW) == 0) {
int j=0;
struct gendisk *gd;
@@ -308,17 +507,22 @@
/* now blank the /proc/partitions table for the wrong partition table,
so that scripts don't accidentally mount it and crash the kernel */
/* XXX: the 0 is an utter hack --hch */
- gd=get_gendisk(MKDEV(major, 0));
+ gd=get_gendisk(MKDEV(disk->major, 0));
if (gd!=NULL) {
- for (j=1+(minor<<gd->minor_shift);j<((minor+1)<<gd->minor_shift);j++)
- gd->part[j].nr_sects=0;
+ if (gd->major==disk->major)
+ for (j=1+(disk->minor<<gd->minor_shift);
+ j<((disk->minor+1)<<gd->minor_shift);
+ j++) gd->part[j].nr_sects=0;
}
}
- raid[device].disk[i].device = MKDEV(major,minor);
- raid[device].disk[i].sectors = maxsectors(major,minor);
+ raid[device].disk[i].device = MKDEV(disk->major,disk->minor);
+ raid[device].disk[i].sectors = maxsectors(disk->major,disk->minor);
raid[device].stride = (1<<prom->raid0_shift);
raid[device].disks = prom->raid_disks;
- raid[device].sectors = prom->total_secs;
+ raid[device].sectors = prom->total_secs-(prom->total_secs%(255*63));
+ raid[device].sectors += raid[device].sectors&1?1:0;
+ raid[device].magic_0=prom->magic_0;
+ disk->device=device;
}
@@ -349,31 +553,23 @@
}
-static __init int hptraid_init_one(int device)
+static __init int hptraid_init_one(int device, u_int8_t type)
{
int i,count;
- probedisk(IDE0_MAJOR, 0, device);
- probedisk(IDE0_MAJOR, 64, device);
- probedisk(IDE1_MAJOR, 0, device);
- probedisk(IDE1_MAJOR, 64, device);
- probedisk(IDE2_MAJOR, 0, device);
- probedisk(IDE2_MAJOR, 64, device);
- probedisk(IDE3_MAJOR, 0, device);
- probedisk(IDE3_MAJOR, 64, device);
- probedisk(IDE4_MAJOR, 0, device);
- probedisk(IDE4_MAJOR, 64, device);
- probedisk(IDE5_MAJOR, 0, device);
- probedisk(IDE5_MAJOR, 64, device);
+ memset(raid+device, 0, sizeof(struct hptraid));
+ for(i=0; i < 14; i++) {
+ probedisk(devlist+i, device, type);
+ }
- fill_cutoff(device);
+ if(type == HPT_T_RAID_0)
+ fill_cutoff(device);
/* Initialize the gendisk structure */
ataraid_register_disk(device,raid[device].sectors);
count=0;
- printk(KERN_INFO "Highpoint HPT370 Softwareraid driver for linux version 0.01\n");
for (i=0;i<8;i++) {
if (raid[device].disk[i].device!=0) {
@@ -394,15 +590,44 @@
static __init int hptraid_init(void)
{
- int retval,device;
-
- device=ataraid_get_device(&hptraid_ops);
- if (device<0)
- return -ENODEV;
- retval = hptraid_init_one(device);
- if (retval)
- ataraid_release_device(device);
- return retval;
+ int retval,device,count=0;
+
+ printk(KERN_INFO "Highpoint HPT370 Softwareraid driver for linux version 0.01-ww1\n");
+
+ do
+ {
+ device=ataraid_get_device(&hptraid0_ops);
+ if (device<0)
+ return (count?0:-ENODEV);
+ retval = hptraid_init_one(device, HPT_T_RAID_0);
+ if (retval)
+ ataraid_release_device(device);
+ else
+ count++;
+ } while(!retval);
+ do
+ {
+ device=ataraid_get_device(&hptraid1_ops);
+ if (device<0)
+ return (count?0:-ENODEV);
+ retval = hptraid_init_one(device, HPT_T_RAID_1);
+ if (retval)
+ ataraid_release_device(device);
+ else
+ count++;
+ } while(!retval);
+ do
+ {
+ device=ataraid_get_device(&hptraidspan_ops);
+ if (device<0)
+ return (count?0:-ENODEV);
+ retval = hptraid_init_one(device, HPT_T_SPAN);
+ if (retval)
+ ataraid_release_device(device);
+ else
+ count++;
+ } while(!retval);
+ return (count?0:retval);
}
static void __exit hptraid_exit (void)
Index: linux/include/linux/pci_ids.h
===================================================================
RCS file: /home/rayn/src/cvsroot/linux/include/linux/pci_ids.h,v
retrieving revision 1.1.1.3
retrieving revision 1.1.1.3.2.1
diff -a -u -r1.1.1.3 -r1.1.1.3.2.1
--- linux/include/linux/pci_ids.h 12 Apr 2003 21:58:17 -0000 1.1.1.3
+++ linux/include/linux/pci_ids.h 13 Apr 2003 20:55:02 -0000 1.1.1.3.2.1
@@ -983,6 +983,7 @@
#define PCI_DEVICE_ID_TTI_HPT302 0x0006
#define PCI_DEVICE_ID_TTI_HPT371 0x0007
#define PCI_DEVICE_ID_TTI_HPT374 0x0008
+#define PCI_DEVICE_ID_TTI_HPT372N 0x0009
#define PCI_VENDOR_ID_VIA 0x1106
#define PCI_DEVICE_ID_VIA_8363_0 0x0305
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