gru: add test for gru_copy_gpa
Jack Steiner [Wed, 16 Dec 2009 00:48:09 +0000 (16:48 -0800)]
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-gru/grukservices.c

index e0d4b53..24ec109 100644 (file)
@@ -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;