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Subject[Patch 13/29] GRU - Add test for gru_copy_gpa
From: Jack Steiner <steiner@sgi.com>

Improve existing driver self-tests. Add a new debugging test to the SGI GRU driver
for verifying the global GRU copy function.

Signed-off-by: Jack Steiner <steiner@sgi.com>

---
drivers/misc/sgi-gru/grukservices.c | 48 +++++++++++++++++++++++++++++-------
1 file changed, 39 insertions(+), 9 deletions(-)
Index: linux/drivers/misc/sgi-gru/grukservices.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grukservices.c 2009-11-20 09:32:29.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grukservices.c 2009-11-20 09:32:32.000000000 -0600
@@ -1004,6 +1004,7 @@ static int quicktest2(unsigned long arg)
int ret = 0;
unsigned long *buf;
void *cb0, *cb;
+ struct gru_control_block_status *gen;
int i, k, istatus, bytes;

bytes = numcb * 4 * 8;
@@ -1023,20 +1024,30 @@ static int quicktest2(unsigned long arg)
XTYPE_DW, 4, 1, IMA_INTERRUPT);

ret = 0;
- for (k = 0; k < numcb; k++) {
+ k = numcb;
+ do {
gru_wait_async_cbr(han);
for (i = 0; i < numcb; i++) {
cb = cb0 + i * GRU_HANDLE_STRIDE;
istatus = gru_check_status(cb);
- if (istatus == CBS_ACTIVE)
- continue;
- if (istatus == CBS_EXCEPTION)
- ret = -EFAULT;
- else if (buf[i] || buf[i + 1] || buf[i + 2] ||
- buf[i + 3])
- ret = -EIO;
+ if (istatus != CBS_ACTIVE && istatus != CBS_CALL_OS)
+ break;
}
- }
+ if (i == numcb)
+ continue;
+ if (istatus != CBS_IDLE) {
+ printk(KERN_DEBUG "GRU:%d quicktest2: cb %d, exception\n", smp_processor_id(), i);
+ ret = -EFAULT;
+ } else if (buf[4 * i] || buf[4 * i + 1] || buf[4 * i + 2] ||
+ buf[4 * i + 3]) {
+ printk(KERN_DEBUG "GRU:%d quicktest2:cb %d, buf 0x%lx, 0x%lx, 0x%lx, 0x%lx\n",
+ smp_processor_id(), i, buf[4 * i], buf[4 * i + 1], buf[4 * i + 2], buf[4 * i + 3]);
+ ret = -EIO;
+ }
+ k--;
+ gen = cb;
+ gen->istatus = CBS_CALL_OS; /* don't handle this CBR again */
+ } while (k);
BUG_ON(cmp.done);

gru_unlock_async_resource(han);
@@ -1046,6 +1057,22 @@ done:
return ret;
}

+#define BUFSIZE 200
+static int quicktest3(unsigned long arg)
+{
+ char buf1[BUFSIZE], buf2[BUFSIZE];
+ int ret = 0;
+
+ memset(buf2, 0, sizeof(buf2));
+ memset(buf1, get_cycles() & 255, sizeof(buf1));
+ gru_copy_gpa(uv_gpa(buf2), uv_gpa(buf1), BUFSIZE);
+ if (memcmp(buf1, buf2, BUFSIZE)) {
+ printk(KERN_DEBUG "GRU quicktest3 error\n");
+ ret = -EIO;
+ }
+ return ret;
+}
+
/*
* Debugging only. User hook for various kernel tests
* of driver & gru.
@@ -1064,6 +1091,9 @@ int gru_ktest(unsigned long arg)
case 2:
ret = quicktest2(arg);
break;
+ case 3:
+ ret = quicktest3(arg);
+ break;
case 99:
ret = gru_free_kernel_contexts();
break;


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