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[SCSI] Add PPR support to spi_print_msg 

Introduce a new helper, print_nego() to handle SDTR/WDTR/PPR.
Split out the guts of show_spi_transport_period_helper() into period_to_str()
and use it in print_nego to get the period factor conversion right.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox 2005-12-15 16:22:01 -05:00 committed by James Bottomley
parent b32aaffcdc
commit ef72582e7a
1 changed files with 29 additions and 7 deletions
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36
drivers/scsi/scsi_transport_spi.c
View File

@ -379,9 +379,7 @@ static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate);
/* Translate the period into ns according to the current spec
* for SDTR/PPR messages */
static ssize_t
show_spi_transport_period_helper(struct class_device *cdev, char *buf,
int period)
static int period_to_str(char *buf, int period)
{
int len, picosec;
@ -399,6 +397,14 @@ show_spi_transport_period_helper(struct class_device *cdev, char *buf,
len = sprint_frac(buf, picosec, 1000);
}
return len;
}
static ssize_t
show_spi_transport_period_helper(struct class_device *cdev, char *buf,
int period)
{
int len = period_to_str(buf, period);
buf[len++] = '\n';
buf[len] = '\0';
return len;
@ -1065,9 +1071,23 @@ static const char * const two_byte_msgs[] = {
static const char * const extended_msgs[] = {
/* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request",
/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request"
/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request",
/* 0x04 */ "Parallel Protocol Request"
};
void print_nego(const unsigned char *msg, int per, int off, int width)
{
if (per) {
char buf[20];
period_to_str(buf, msg[per]);
printk("period = %s ns ", buf);
}
if (off)
printk("offset = %d ", msg[off]);
if (width)
printk("width = %d ", 8 << msg[width]);
}
int spi_print_msg(const unsigned char *msg)
{
@ -1085,11 +1105,13 @@ int spi_print_msg(const unsigned char *msg)
(msg[4] << 16) | (msg[5] << 8) | msg[6]);
break;
case EXTENDED_SDTR:
printk("period = %d ns, offset = %d",
(int) msg[3] * 4, (int) msg[4]);
print_nego(msg, 3, 4, 0);
break;
case EXTENDED_WDTR:
printk("width = 2^%d bytes", msg[3]);
print_nego(msg, 0, 0, 3);
break;
case EXTENDED_PPR:
print_nego(msg, 3, 5, 6);
break;
default:
for (i = 2; i < len; ++i)