mtd: tests: add multiblock erase test to the mtd_speedtest

New multiblock erase speed test is added to mtd_speedtest.
It consists of 2-, 4-, 8-, 16-, 32- and 64-blocks at once
multiblock erase tests.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 57 insertions, 2 deletions

diff --git a/drivers/mtd/tests/mtd_speedtest.c b/drivers/mtd/tests/mtd_speedtest.c
index 9bd986ef3b53..3ce6fce75e07 100644
--- a/drivers/mtd/tests/mtd_speedtest.c
+++ b/drivers/mtd/tests/mtd_speedtest.c
@@ -94,6 +94,33 @@ static int erase_eraseblock(int ebnum)
         return 0;
 }
 
+static int multiblock_erase(int ebnum, int blocks)
+{
+        int err;
+        struct erase_info ei;
+        loff_t addr = ebnum * mtd->erasesize;
+
+        memset(&ei, 0, sizeof(struct erase_info));
+        ei.mtd  = mtd;
+        ei.addr = addr;
+        ei.len  = mtd->erasesize * blocks;
+
+        err = mtd->erase(mtd, &ei);
+        if (err) {
+                printk(PRINT_PREF "error %d while erasing EB %d, blocks %d\n",
+                       err, ebnum, blocks);
+                return err;
+        }
+
+        if (ei.state == MTD_ERASE_FAILED) {
+                printk(PRINT_PREF "some erase error occurred at EB %d,"
+                       "blocks %d\n", ebnum, blocks);
+                return -EIO;
+        }
+
+        return 0;
+}
+
 static int erase_whole_device(void)
 {
         int err;
@@ -292,7 +319,10 @@ static long calc_speed(void)
         ms = (finish.tv_sec - start.tv_sec) * 1000 +
              (finish.tv_usec - start.tv_usec) / 1000;
         k = goodebcnt * mtd->erasesize / 1024;
-        speed = (k * 1000) / ms;
+        if (ms)
+                speed = (k * 1000) / ms;
+        else
+                speed = 0;
         return speed;
 }
 
@@ -325,7 +355,7 @@ out:
 
 static int __init mtd_speedtest_init(void)
 {
-        int err, i;
+        int err, i, blocks, j, k;
         long speed;
         uint64_t tmp;
 
@@ -495,6 +525,31 @@ static int __init mtd_speedtest_init(void)
         speed = calc_speed();
         printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed);
 
+        /* Multi-block erase all eraseblocks */
+        for (k = 1; k < 7; k++) {
+                blocks = 1 << k;
+                printk(PRINT_PREF "Testing %dx multi-block erase speed\n",
+                       blocks);
+                start_timing();
+                for (i = 0; i < ebcnt; ) {
+                        for (j = 0; j < blocks && (i + j) < ebcnt; j++)
+                                if (bbt[i + j])
+                                        break;
+                        if (j < 1) {
+                                i++;
+                                continue;
+                        }
+                        err = multiblock_erase(i, j);
+                        if (err)
+                                goto out;
+                        cond_resched();
+                        i += j;
+                }
+                stop_timing();
+                speed = calc_speed();
+                printk(PRINT_PREF "%dx multi-block erase speed is %ld KiB/s\n",
+                       blocks, speed);
+        }
         printk(PRINT_PREF "finished\n");
 out:
         kfree(iobuf);