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authorJack Steiner <steiner@sgi.com>2009-06-17 16:28:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:04:03 -0700
commit92b39388eeb45326feb0fa8bd69dbbce66c9efbf (patch)
treef39193cc5341dfd4ed3b807f9f802c4575822a29 /drivers/misc
parent9f2501142bd3c496afa7efdf18583aab56fe3134 (diff)
gru: generic infrastructure for context options
Change the user GRU request for specifying the "task_slice" option to use a generic infrastructure that can be expanded in the future to include additional context options. No new capabilities are added with this patch. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/sgi-gru/grufault.c24
-rw-r--r--drivers/misc/sgi-gru/grufile.c4
-rw-r--r--drivers/misc/sgi-gru/grulib.h14
-rw-r--r--drivers/misc/sgi-gru/gruprocfs.c2
-rw-r--r--drivers/misc/sgi-gru/grutables.h4
5 files changed, 35 insertions, 13 deletions
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index cdd151b30dc..b894b7ed9c3 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -749,18 +749,30 @@ long gru_get_gseg_statistics(unsigned long arg)
* Register the current task as the user of the GSEG slice.
* Needed for TLB fault interrupt targeting.
*/
-int gru_set_task_slice(long address)
+int gru_set_context_option(unsigned long arg)
{
struct gru_thread_state *gts;
+ struct gru_set_context_option_req req;
+ int ret = 0;
- STAT(set_task_slice);
- gru_dbg(grudev, "address 0x%lx\n", address);
- gts = gru_alloc_locked_gts(address);
+ STAT(set_context_option);
+ if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
+ return -EFAULT;
+ gru_dbg(grudev, "op %d, gseg 0x%lx, value1 0x%lx\n", req.op, req.gseg, req.val1);
+
+ gts = gru_alloc_locked_gts(req.gseg);
if (!gts)
return -EINVAL;
- gts->ts_tgid_owner = current->tgid;
+ switch (req.op) {
+ case sco_gseg_owner:
+ /* Register the current task as the GSEG owner */
+ gts->ts_tgid_owner = current->tgid;
+ break;
+ default:
+ ret = -EINVAL;
+ }
gru_unlock_gts(gts);
- return 0;
+ return ret;
}
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index 2b72629db91..fa2d93a9fb8 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -198,8 +198,8 @@ static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
case GRU_CREATE_CONTEXT:
err = gru_create_new_context(arg);
break;
- case GRU_SET_TASK_SLICE:
- err = gru_set_task_slice(arg);
+ case GRU_SET_CONTEXT_OPTION:
+ err = gru_set_context_option(arg);
break;
case GRU_USER_GET_EXCEPTION_DETAIL:
err = gru_get_exception_detail(arg);
diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
index 8ed6acbc47c..8615b904a7c 100644
--- a/drivers/misc/sgi-gru/grulib.h
+++ b/drivers/misc/sgi-gru/grulib.h
@@ -32,8 +32,8 @@
/* Set Number of Request Blocks */
#define GRU_CREATE_CONTEXT _IOWR(GRU_IOCTL_NUM, 1, void *)
-/* Register task as using the slice */
-#define GRU_SET_TASK_SLICE _IOWR(GRU_IOCTL_NUM, 5, void *)
+/* Set Context Options */
+#define GRU_SET_CONTEXT_OPTION _IOWR(GRU_IOCTL_NUM, 4, void *)
/* Fetch exception detail */
#define GRU_USER_GET_EXCEPTION_DETAIL _IOWR(GRU_IOCTL_NUM, 6, void *)
@@ -96,6 +96,16 @@ struct gru_unload_context_req {
};
/*
+ * Structure used to set context options
+ */
+enum {sco_gseg_owner};
+struct gru_set_context_option_req {
+ unsigned long gseg;
+ int op;
+ unsigned long val1;
+};
+
+/*
* Structure used to pass TLB flush parameters to the driver
*/
struct gru_flush_tlb_req {
diff --git a/drivers/misc/sgi-gru/gruprocfs.c b/drivers/misc/sgi-gru/gruprocfs.c
index b5b9cf5c182..9cbf95bedce 100644
--- a/drivers/misc/sgi-gru/gruprocfs.c
+++ b/drivers/misc/sgi-gru/gruprocfs.c
@@ -73,7 +73,7 @@ static int statistics_show(struct seq_file *s, void *p)
printstat(s, user_flush_tlb);
printstat(s, user_unload_context);
printstat(s, user_exception);
- printstat(s, set_task_slice);
+ printstat(s, set_context_option);
printstat(s, migrate_check);
printstat(s, migrated_retarget);
printstat(s, migrated_unload);
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index 63b76e2732f..ee2f4121db2 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -198,7 +198,7 @@ struct gru_stats_s {
atomic_long_t user_flush_tlb;
atomic_long_t user_unload_context;
atomic_long_t user_exception;
- atomic_long_t set_task_slice;
+ atomic_long_t set_context_option;
atomic_long_t migrate_check;
atomic_long_t migrated_retarget;
atomic_long_t migrated_unload;
@@ -649,7 +649,7 @@ extern int gru_handle_user_call_os(unsigned long address);
extern int gru_user_flush_tlb(unsigned long arg);
extern int gru_user_unload_context(unsigned long arg);
extern int gru_get_exception_detail(unsigned long arg);
-extern int gru_set_task_slice(long address);
+extern int gru_set_context_option(unsigned long address);
extern int gru_cpu_fault_map_id(void);
extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
extern void gru_flush_all_tlb(struct gru_state *gru);