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[SCSI] sym53c8xx: Remove tag_ctrl module parameter 

With sysfs making these options tunable at runtime, there's no
justification for keeping this horrendously complex specification
string around.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox 2007-10-05 15:55:08 -04:00 committed by James Bottomley
parent 8637baa360
commit a44131b35e
3 changed files with 8 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
Documentation/scsi/sym53c8xx_2.txt
View File

@ -449,25 +449,14 @@ options as above.
cmd_per_lun=#tags (#tags > 1) tagged command queuing enabled
#tags will be truncated to the max queued commands configuration parameter.
10.2.2 Detailed control of tagged commands
This option allows you to specify a command queue depth for each device
that supports tagged command queueing.
Example:
tag_ctrl=10/t2t3q16-t5q24/t1u2q32
will set devices queue depth as follow:
- controller #0 target #2 and target #3 -> 16 commands,
- controller #0 target #5 -> 24 commands,
- controller #1 target #1 logical unit #2 -> 32 commands,
- all other logical units (all targets, all controllers) -> 10 commands.
10.2.3 Burst max
10.2.2 Burst max
burst=0 burst disabled
burst=255 get burst length from initial IO register settings.
burst=#x burst enabled (1<<#x burst transfers max)
#x is an integer value which is log base 2 of the burst transfers max.
By default the driver uses the maximum value supported by the chip.
10.2.4 LED support
10.2.3 LED support
led=1 enable LED support
led=0 disable LED support
Do not enable LED support if your scsi board does not use SDMS BIOS.
@ -560,9 +549,9 @@ Previously, the sym2 driver accepted arguments of the form
sym53c8xx=tags:4,sync:10,debug:0x200
As a result of the new module parameters, this is no longer available.
Most of the options have remained the same, but tags has split into
cmd_per_lun and tag_ctrl for its two different purposes. The sample above
would be specified as:
Most of the options have remained the same, but tags has become
cmd_per_lun to reflect its different purposes. The sample above would
be specified as:
modprobe sym53c8xx cmd_per_lun=4 sync=10 debug=0x200
or on the kernel boot line as:

1
drivers/scsi/sym53c8xx_2/sym53c8xx.h
View File

@ -127,7 +127,6 @@ struct sym_driver_setup {
u_char settle_delay;
u_char use_nvram;
u_long excludes[8];
char tag_ctrl[100];
};
#define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag

66
drivers/scsi/sym53c8xx_2/sym_glue.c
View File

@ -63,7 +63,6 @@ unsigned int sym_debug_flags = 0;
static char *excl_string;
static char *safe_string;
module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
@ -78,7 +77,6 @@ module_param_named(excl, excl_string, charp, 0);
module_param_named(safe, safe_string, charp, 0);
MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
@ -744,59 +742,6 @@ static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
}
}
/*
* Linux select queue depths function
*/
#define DEF_DEPTH (sym_driver_setup.max_tag)
#define ALL_TARGETS -2
#define NO_TARGET -1
#define ALL_LUNS -2
#define NO_LUN -1
static int device_queue_depth(struct sym_hcb *np, int target, int lun)
{
int c, h, t, u, v;
char *p = sym_driver_setup.tag_ctrl;
char *ep;
h = -1;
t = NO_TARGET;
u = NO_LUN;
while ((c = *p++) != 0) {
v = simple_strtoul(p, &ep, 0);
switch(c) {
case '/':
++h;
t = ALL_TARGETS;
u = ALL_LUNS;
break;
case 't':
if (t != target)
t = (target == v) ? v : NO_TARGET;
u = ALL_LUNS;
break;
case 'u':
if (u != lun)
u = (lun == v) ? v : NO_LUN;
break;
case 'q':
if (h == np->s.unit &&
(t == ALL_TARGETS || t == target) &&
(u == ALL_LUNS || u == lun))
return v;
break;
case '-':
t = ALL_TARGETS;
u = ALL_LUNS;
break;
default:
break;
}
p = ep;
}
return DEF_DEPTH;
}
static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
{
struct sym_hcb *np = sym_get_hcb(sdev->host);
@ -861,21 +806,16 @@ static int sym53c8xx_slave_configure(struct scsi_device *sdev)
* Use at least 2.
* Donnot use more than our maximum.
*/
reqtags = device_queue_depth(np, sdev->id, sdev->lun);
reqtags = sym_driver_setup.max_tag;
if (reqtags > tp->usrtags)
reqtags = tp->usrtags;
if (!sdev->tagged_supported)
reqtags = 0;
#if 1 /* Avoid to locally queue commands for no good reasons */
if (reqtags > SYM_CONF_MAX_TAG)
reqtags = SYM_CONF_MAX_TAG;
depth_to_use = (reqtags ? reqtags : 2);
#else
depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
#endif
depth_to_use = reqtags ? reqtags : 2;
scsi_adjust_queue_depth(sdev,
(sdev->tagged_supported ?
MSG_SIMPLE_TAG : 0),
sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
depth_to_use);
lp->s.scdev_depth = depth_to_use;
sym_tune_dev_queuing(tp, sdev->lun, reqtags);