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path: root/drivers/block/hd.c
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Diffstat (limited to 'drivers/block/hd.c')
-rw-r--r--drivers/block/hd.c159
1 files changed, 79 insertions, 80 deletions
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 482c0c4b964..8a290c08262 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -34,7 +34,6 @@
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/genhd.h>
-#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -42,8 +41,9 @@
#include <linux/ata.h>
#include <linux/hdreg.h>
+#define HD_IRQ 14
+
#define REALLY_SLOW_IO
-#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
@@ -96,10 +96,7 @@
static DEFINE_SPINLOCK(hd_lock);
static struct request_queue *hd_queue;
-
-#define MAJOR_NR HD_MAJOR
-#define QUEUE (hd_queue)
-#define CURRENT elv_next_request(hd_queue)
+static struct request *hd_req;
#define TIMEOUT_VALUE (6*HZ)
#define HD_DELAY 0
@@ -157,7 +154,7 @@ else \
#if (HD_DELAY > 0)
-#include <asm/i8253.h>
+#include <linux/i8253.h>
unsigned long last_req;
@@ -166,12 +163,12 @@ unsigned long read_timer(void)
unsigned long t, flags;
int i;
- spin_lock_irqsave(&i8253_lock, flags);
+ raw_spin_lock_irqsave(&i8253_lock, flags);
t = jiffies * 11932;
outb_p(0, 0x43);
i = inb_p(0x40);
i |= inb(0x40) << 8;
- spin_unlock_irqrestore(&i8253_lock, flags);
+ raw_spin_unlock_irqrestore(&i8253_lock, flags);
return(t - i);
}
#endif
@@ -193,11 +190,24 @@ static void __init hd_setup(char *str, int *ints)
NR_HD = hdind+1;
}
+static bool hd_end_request(int err, unsigned int bytes)
+{
+ if (__blk_end_request(hd_req, err, bytes))
+ return true;
+ hd_req = NULL;
+ return false;
+}
+
+static bool hd_end_request_cur(int err)
+{
+ return hd_end_request(err, blk_rq_cur_bytes(hd_req));
+}
+
static void dump_status(const char *msg, unsigned int stat)
{
char *name = "hd?";
- if (CURRENT)
- name = CURRENT->rq_disk->disk_name;
+ if (hd_req)
+ name = hd_req->rq_disk->disk_name;
#ifdef VERBOSE_ERRORS
printk("%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
@@ -225,8 +235,8 @@ static void dump_status(const char *msg, unsigned int stat)
if (hd_error & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
printk(", CHS=%d/%d/%d", (inb(HD_HCYL)<<8) + inb(HD_LCYL),
inb(HD_CURRENT) & 0xf, inb(HD_SECTOR));
- if (CURRENT)
- printk(", sector=%ld", CURRENT->sector);
+ if (hd_req)
+ printk(", sector=%ld", blk_rq_pos(hd_req));
}
printk("\n");
}
@@ -404,11 +414,12 @@ static void unexpected_hd_interrupt(void)
*/
static void bad_rw_intr(void)
{
- struct request *req = CURRENT;
+ struct request *req = hd_req;
+
if (req != NULL) {
struct hd_i_struct *disk = req->rq_disk->private_data;
if (++req->errors >= MAX_ERRORS || (hd_error & BBD_ERR)) {
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
disk->special_op = disk->recalibrate = 1;
} else if (req->errors % RESET_FREQ == 0)
reset = 1;
@@ -450,37 +461,30 @@ static void read_intr(void)
bad_rw_intr();
hd_request();
return;
+
ok_to_read:
- req = CURRENT;
- insw(HD_DATA, req->buffer, 256);
- req->sector++;
- req->buffer += 512;
- req->errors = 0;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
+ req = hd_req;
+ insw(HD_DATA, bio_data(req->bio), 256);
#ifdef DEBUG
- printk("%s: read: sector %ld, remaining = %ld, buffer=%p\n",
- req->rq_disk->disk_name, req->sector, req->nr_sectors,
- req->buffer+512);
+ printk("%s: read: sector %ld, remaining = %u, buffer=%p\n",
+ req->rq_disk->disk_name, blk_rq_pos(req) + 1,
+ blk_rq_sectors(req) - 1, bio_data(req->bio)+512);
#endif
- if (req->current_nr_sectors <= 0)
- end_request(req, 1);
- if (i > 0) {
+ if (hd_end_request(0, 512)) {
SET_HANDLER(&read_intr);
return;
}
+
(void) inb_p(HD_STATUS);
#if (HD_DELAY > 0)
last_req = read_timer();
#endif
- if (elv_next_request(QUEUE))
- hd_request();
- return;
+ hd_request();
}
static void write_intr(void)
{
- struct request *req = CURRENT;
+ struct request *req = hd_req;
int i;
int retries = 100000;
@@ -490,31 +494,25 @@ static void write_intr(void)
continue;
if (!OK_STATUS(i))
break;
- if ((req->nr_sectors <= 1) || (i & DRQ_STAT))
+ if ((blk_rq_sectors(req) <= 1) || (i & DRQ_STAT))
goto ok_to_write;
} while (--retries > 0);
dump_status("write_intr", i);
bad_rw_intr();
hd_request();
return;
+
ok_to_write:
- req->sector++;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
- req->buffer += 512;
- if (!i || (req->bio && req->current_nr_sectors <= 0))
- end_request(req, 1);
- if (i > 0) {
+ if (hd_end_request(0, 512)) {
SET_HANDLER(&write_intr);
- outsw(HD_DATA, req->buffer, 256);
- local_irq_enable();
- } else {
+ outsw(HD_DATA, bio_data(req->bio), 256);
+ return;
+ }
+
#if (HD_DELAY > 0)
- last_req = read_timer();
+ last_req = read_timer();
#endif
- hd_request();
- }
- return;
+ hd_request();
}
static void recal_intr(void)
@@ -536,23 +534,21 @@ static void hd_times_out(unsigned long dummy)
do_hd = NULL;
- if (!CURRENT)
+ if (!hd_req)
return;
- disable_irq(HD_IRQ);
- local_irq_enable();
+ spin_lock_irq(hd_queue->queue_lock);
reset = 1;
- name = CURRENT->rq_disk->disk_name;
+ name = hd_req->rq_disk->disk_name;
printk("%s: timeout\n", name);
- if (++CURRENT->errors >= MAX_ERRORS) {
+ if (++hd_req->errors >= MAX_ERRORS) {
#ifdef DEBUG
printk("%s: too many errors\n", name);
#endif
- end_request(CURRENT, 0);
+ hd_end_request_cur(-EIO);
}
- local_irq_disable();
hd_request();
- enable_irq(HD_IRQ);
+ spin_unlock_irq(hd_queue->queue_lock);
}
static int do_special_op(struct hd_i_struct *disk, struct request *req)
@@ -564,7 +560,7 @@ static int do_special_op(struct hd_i_struct *disk, struct request *req)
}
if (disk->head > 16) {
printk("%s: cannot handle device with more than 16 heads - giving up\n", req->rq_disk->disk_name);
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
}
disk->special_op = 0;
return 1;
@@ -590,27 +586,28 @@ static void hd_request(void)
return;
repeat:
del_timer(&device_timer);
- local_irq_enable();
- req = CURRENT;
- if (!req) {
- do_hd = NULL;
- return;
+ if (!hd_req) {
+ hd_req = blk_fetch_request(hd_queue);
+ if (!hd_req) {
+ do_hd = NULL;
+ return;
+ }
}
+ req = hd_req;
if (reset) {
- local_irq_disable();
reset_hd();
return;
}
disk = req->rq_disk->private_data;
- block = req->sector;
- nsect = req->nr_sectors;
+ block = blk_rq_pos(req);
+ nsect = blk_rq_sectors(req);
if (block >= get_capacity(req->rq_disk) ||
((block+nsect) > get_capacity(req->rq_disk))) {
printk("%s: bad access: block=%d, count=%d\n",
req->rq_disk->disk_name, block, nsect);
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
goto repeat;
}
@@ -627,9 +624,9 @@ repeat:
printk("%s: %sing: CHS=%d/%d/%d, sectors=%d, buffer=%p\n",
req->rq_disk->disk_name,
req_data_dir(req) == READ ? "read" : "writ",
- cyl, head, sec, nsect, req->buffer);
+ cyl, head, sec, nsect, bio_data(req->bio));
#endif
- if (blk_fs_request(req)) {
+ if (req->cmd_type == REQ_TYPE_FS) {
switch (rq_data_dir(req)) {
case READ:
hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_READ,
@@ -646,11 +643,11 @@ repeat:
bad_rw_intr();
goto repeat;
}
- outsw(HD_DATA, req->buffer, 256);
+ outsw(HD_DATA, bio_data(req->bio), 256);
break;
default:
printk("unknown hd-command\n");
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
break;
}
}
@@ -658,9 +655,7 @@ repeat:
static void do_hd_request(struct request_queue *q)
{
- disable_irq(HD_IRQ);
hd_request();
- enable_irq(HD_IRQ);
}
static int hd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
@@ -682,16 +677,20 @@ static irqreturn_t hd_interrupt(int irq, void *dev_id)
{
void (*handler)(void) = do_hd;
+ spin_lock(hd_queue->queue_lock);
+
do_hd = NULL;
del_timer(&device_timer);
if (!handler)
handler = unexpected_hd_interrupt;
handler();
- local_irq_enable();
+
+ spin_unlock(hd_queue->queue_lock);
+
return IRQ_HANDLED;
}
-static struct block_device_operations hd_fops = {
+static const struct block_device_operations hd_fops = {
.getgeo = hd_getgeo,
};
@@ -709,19 +708,19 @@ static int __init hd_init(void)
{
int drive;
- if (register_blkdev(MAJOR_NR, "hd"))
+ if (register_blkdev(HD_MAJOR, "hd"))
return -1;
hd_queue = blk_init_queue(do_hd_request, &hd_lock);
if (!hd_queue) {
- unregister_blkdev(MAJOR_NR, "hd");
+ unregister_blkdev(HD_MAJOR, "hd");
return -ENOMEM;
}
- blk_queue_max_sectors(hd_queue, 255);
+ blk_queue_max_hw_sectors(hd_queue, 255);
init_timer(&device_timer);
device_timer.function = hd_times_out;
- blk_queue_hardsect_size(hd_queue, 512);
+ blk_queue_logical_block_size(hd_queue, 512);
if (!NR_HD) {
/*
@@ -733,7 +732,7 @@ static int __init hd_init(void)
* the BIOS or CMOS. This doesn't work all that well,
* since this assumes that this is a primary or secondary
* drive, and if we're using this legacy driver, it's
- * probably an auxilliary controller added to recover
+ * probably an auxiliary controller added to recover
* legacy data off an ST-506 drive. Either way, it's
* definitely safest to have the user explicitly specify
* the information.
@@ -748,7 +747,7 @@ static int __init hd_init(void)
struct hd_i_struct *p = &hd_info[drive];
if (!disk)
goto Enomem;
- disk->major = MAJOR_NR;
+ disk->major = HD_MAJOR;
disk->first_minor = drive << 6;
disk->fops = &hd_fops;
sprintf(disk->disk_name, "hd%c", 'a'+drive);
@@ -792,7 +791,7 @@ out1:
NR_HD = 0;
out:
del_timer(&device_timer);
- unregister_blkdev(MAJOR_NR, "hd");
+ unregister_blkdev(HD_MAJOR, "hd");
blk_cleanup_queue(hd_queue);
return -1;
Enomem:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 05:04:42 +0000