sgi-xp: support runtime selection of xp_max_npartitions
Support runtime selection of the max number of partitions based on the
hardware being run on.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-xp/xp_main.c b/drivers/misc/sgi-xp/xp_main.c
index 196480b..c5cec60 100644
--- a/drivers/misc/sgi-xp/xp_main.c
+++ b/drivers/misc/sgi-xp/xp_main.c
@@ -15,28 +15,32 @@
*/
#include <linux/kernel.h>
-#include <linux/interrupt.h>
#include <linux/module.h>
-#include <linux/mutex.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
+#include <linux/device.h>
#include "xp.h"
-/*
- * The export of xp_nofault_PIOR needs to happen here since it is defined
- * in drivers/misc/sgi-xp/xp_nofault.S. The target of the nofault read is
- * defined here.
- */
-EXPORT_SYMBOL_GPL(xp_nofault_PIOR);
+/* define the XP debug device structures to be used with dev_dbg() et al */
-u64 xp_nofault_PIOR_target;
-EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
+struct device_driver xp_dbg_name = {
+ .name = "xp"
+};
+
+struct device xp_dbg_subname = {
+ .bus_id = {0}, /* set to "" */
+ .driver = &xp_dbg_name
+};
+
+struct device *xp = &xp_dbg_subname;
+
+/* max #of partitions possible */
+short xp_max_npartitions;
+EXPORT_SYMBOL_GPL(xp_max_npartitions);
/*
* xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
* users of XPC.
*/
-struct xpc_registration xpc_registrations[XPC_NCHANNELS];
+struct xpc_registration xpc_registrations[XPC_MAX_NCHANNELS];
EXPORT_SYMBOL_GPL(xpc_registrations);
/*
@@ -135,7 +139,7 @@
{
struct xpc_registration *registration;
- DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+ DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
DBUG_ON(payload_size == 0 || nentries == 0);
DBUG_ON(func == NULL);
DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
@@ -185,7 +189,7 @@
{
struct xpc_registration *registration;
- DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+ DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
registration = &xpc_registrations[ch_number];
@@ -221,39 +225,21 @@
int __init
xp_init(void)
{
- int ret, ch_number;
- u64 func_addr = *(u64 *)xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *)xp_error_PIOR;
+ enum xp_retval ret;
+ int ch_number;
- if (!ia64_platform_is("sn2"))
+ if (is_shub())
+ ret = xp_init_sn2();
+ else if (is_uv())
+ ret = xp_init_uv();
+ else
+ ret = xpUnsupported;
+
+ if (ret != xpSuccess)
return -ENODEV;
- /*
- * Register a nofault code region which performs a cross-partition
- * PIO read. If the PIO read times out, the MCA handler will consume
- * the error and return to a kernel-provided instruction to indicate
- * an error. This PIO read exists because it is guaranteed to timeout
- * if the destination is down (AMO operations do not timeout on at
- * least some CPUs on Shubs <= v1.2, which unfortunately we have to
- * work around).
- */
- ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
- 1, 1);
- if (ret != 0) {
- printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
- ret);
- }
- /*
- * Setup the nofault PIO read target. (There is no special reason why
- * SH_IPI_ACCESS was selected.)
- */
- if (is_shub2())
- xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
- else
- xp_nofault_PIOR_target = SH1_IPI_ACCESS;
-
/* initialize the connection registration mutex */
- for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++)
+ for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++)
mutex_init(&xpc_registrations[ch_number].mutex);
return 0;
@@ -264,12 +250,10 @@
void __exit
xp_exit(void)
{
- u64 func_addr = *(u64 *)xp_nofault_PIOR;
- u64 err_func_addr = *(u64 *)xp_error_PIOR;
-
- /* unregister the PIO read nofault code region */
- (void)sn_register_nofault_code(func_addr, err_func_addr,
- err_func_addr, 1, 0);
+ if (is_shub())
+ xp_exit_sn2();
+ else if (is_uv())
+ xp_exit_uv();
}
module_exit(xp_exit);