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Commit 33f36483 authored by Jack Steiner's avatar Jack Steiner Committed by Linus Torvalds
Browse files

gru: add test for gru_copy_gpa 



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: default avatarJack Steiner <steiner@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b8229bed

drivers/misc/sgi-gru/grukservices.c

+39 −9
Original line number Diff line number Diff line
@@ -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)

			if (istatus != CBS_ACTIVE && istatus != CBS_CALL_OS)

				break;

		}

		if (i == numcb)

			continue;

			if (istatus == CBS_EXCEPTION)

		if (istatus != CBS_IDLE) {

			printk(KERN_DEBUG "GRU:%d quicktest2: cb %d, exception\n", smp_processor_id(), i);

			ret = -EFAULT;

			else if (buf[i] || buf[i + 1] || buf[i + 2] ||

					buf[i + 3])

		} 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 @@ static int quicktest2(unsigned long arg) 
	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;