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gru: add user request to explicitly unload a gru context

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Add user function to explicitly unload GRU kernel contexts from the GRU.
Only contexts that are not in-use will be unloaded.

This function is primarily for testing.  It is not expected that this will
be used in normal production systems.

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>
This commit is contained in:
Jack Steiner
2009-06-17 16:28:28 -07:00
committed by Linus Torvalds
vanhempi 1a2c09e3b4
commit d5826dd600
3 muutettua tiedostoa jossa 41 lisäystä ja 28 poistoa
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10
drivers/misc/sgi-gru/grufile.c
Näytä tiedosto

@@ -287,7 +287,6 @@ static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n",
bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
gru->gs_gru_base_paddr);
gru_kservices_init(gru);
}
static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
@@ -314,6 +313,7 @@ static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
spin_lock_init(&gru_base[bid]->bs_lock);
init_rwsem(&gru_base[bid]->bs_kgts_sema);
dsrbytes = 0;
cbrs = 0;
@@ -426,6 +426,7 @@ static int __init gru_init(void)
printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
goto exit3;
}
gru_kservices_init();
printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
GRU_DRIVER_VERSION_STR);
@@ -444,7 +445,7 @@ exit1:
static void __exit gru_exit(void)
{
int i, bid, gid;
int i, bid;
int order = get_order(sizeof(struct gru_state) *
GRU_CHIPLETS_PER_BLADE);
@@ -453,10 +454,7 @@ static void __exit gru_exit(void)
for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
free_irq(IRQ_GRU + i, NULL);
foreach_gid(gid)
gru_kservices_exit(GID_TO_GRU(gid));
gru_kservices_exit();
for (bid = 0; bid < GRU_MAX_BLADES; bid++)
free_pages((unsigned long)gru_base[bid], order);