From c2e5caf3606b85b6f45cde53b8021692ef01710e Mon Sep 17 00:00:00 2001
From: Ali Saidi <saidi@eecs.umich.edu>
Date: Mon, 12 Jul 2004 22:51:20 -0400
Subject: [PATCH] modified devtime to print out raw data

--HG--
extra : convert_revision : 5ad673d6f684acaffeb61db794f7e2ac099ba99d
---
 util/ccdrv/devtime.c | 59 ++++++++++++++++++++++++++++----------------
 1 file changed, 38 insertions(+), 21 deletions(-)

diff --git a/util/ccdrv/devtime.c b/util/ccdrv/devtime.c
index 0e5d17f60..c3897e597 100644
--- a/util/ccdrv/devtime.c
+++ b/util/ccdrv/devtime.c
@@ -46,7 +46,6 @@
 #define DRIVER_DESC   "Interface to time uncacachable read and writes to device registers"
 #define DRIVER_VER    "0.1"
 
-static unsigned long devCnt, devSum, devSsq;
 static char *dataAddr = NULL;
 static int count = 0;
 
@@ -55,35 +54,43 @@ static inline uint32_t cycleCounter(uint32_t dep);
 static int __init devtime_start(void)
 {
     uint64_t addr;
-    uint32_t t1, t2;
+        uint32_t t1, t2;
     uint32_t trash;
     int x;
-
+    uint32_t *times;
+    uint32_t num = 0;
     struct net_device *dev;
 
 
     printk("Devtime Driver Version %s Loaded...\n", DRIVER_VER);
 
-    if (dataAddr != 0 && count != 0) {
+    if ((dataAddr != 0) && (count != 0))
+    {
         addr = simple_strtoull(dataAddr, NULL, 0);
 
-        devSum = 0;
-        devCnt = count;
-
         addr = ioremap(addr, PAGE_SIZE);
         /**
          * Make sure that the remapping actually worked. On alpha we have
          * linear addressing, so its not a problem. But it can fail in x86
          * if physical memory is mapped to this address.
          */
-        if (addr) {
+        times = kmalloc(sizeof(uint32_t) * count, GFP_USER);
+        if (!times)
+        {
+            printk("Could not allocate memory... Try again later.\n");
+            return -1;
+        }
+
+        if (addr)
+        {
             printk("Preparing to read %#llx %d times.\n", addr, count);
 
             t1 = cycleCounter(trash);
-            for (x = 0; x < count; x++) {
+            for (x=0; x < count; x++)
+            {
                 trash = readl(addr);
                 t2 = cycleCounter(trash);
-                devSum += t2 - t1;
+                times[num++] = t2 - t1;
                 t1 = t2;
             }
 
@@ -92,26 +99,37 @@ static int __init devtime_start(void)
              */
             iounmap(addr);
 
-            printk("Read Address %#llx %ld times. Average latency %ld.\n",
-                   addr, devCnt, devSum/devCnt);
+            printk("Measurements:\n");
+            for (x = 0; x < count; x++)
+            {
+                printk("%d ", times[x]);
+                if (((x+1) % 10) == 0)
+                    printk("\n");
+            }
+            printk("\nDone.\n");
+
+
         }
         else
             printk("Unable to remap address. Please try again later.\n");
     } else {
         dev = dev_get_by_name("eth0");
-        if (dev) {
-            printk("Eth0: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n",
-                   dev->mem_start, dev->mem_end, dev->base_addr);
+        if (dev)
+        {
+            printk("Eth0: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", dev->mem_start,
+                    dev->mem_end, dev->base_addr);
             dev_put(dev);
         }
         dev = 0;
         dev = dev_get_by_name("eth1");
-        if (dev) {
-            printk("Eth1: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n",
-                   dev->mem_start, dev->mem_end, dev->base_addr);
+        if (dev)
+        {
+            printk("Eth1: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", dev->mem_start,
+                    dev->mem_end, dev->base_addr);
             dev_put(dev);
         }
 
+
         printk("Required information not supplied.\n");
     }
 
@@ -141,8 +159,7 @@ inline uint32_t cycleCounter(uint32_t dep)
 #error Architecture NOT SUPPORTE
 #endif
 
-static void __exit devtime_end(void)
-{
+static void __exit devtime_end(void) {
     printk("Devtime Driver Version %s Unloaded...\n", DRIVER_VER);
 }
 
@@ -150,7 +167,7 @@ static void __exit devtime_end(void)
 module_init(devtime_start);
 module_exit(devtime_end);
 
-MODULE_LICENSE("BSD");
+MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 module_param(dataAddr, charp, 0);