Message-Id: <1302116833-24540-4-git-send-email-per.forlin@linaro.org>
Date:	Wed,  6 Apr 2011 21:07:04 +0200
From:	Per Forlin <per.forlin@...aro.org>
To:	linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org
Cc:	Chris Ball <cjb@...top.org>, Per Forlin <per.forlin@...aro.org>
Subject: [PATCH v2 03/12] mmc: mmc_test: add test for none blocking transfers

Add four tests for read and write performance per
different transfer size, 4k to 4M.
 * Read using blocking mmc request
 * Read using none blocking mmc request
 * Write using blocking mmc request
 * Write using none blocking mmc request

The host dirver must support pre_req() and post_req()
in order to run the none blocking test cases.

Signed-off-by: Per Forlin <per.forlin@...aro.org>
---
 drivers/mmc/card/mmc_test.c |  312 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 304 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 466cdb5..1000383 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -22,6 +22,7 @@
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
 #include <linux/seq_file.h>
+#include <linux/random.h>
 
 #define RESULT_OK		0
 #define RESULT_FAIL		1
@@ -51,10 +52,12 @@ struct mmc_test_pages {
  * struct mmc_test_mem - allocated memory.
  * @arr: array of allocations
  * @cnt: number of allocations
+ * @size_min_cmn: lowest common size in array of allocations
  */
 struct mmc_test_mem {
 	struct mmc_test_pages *arr;
 	unsigned int cnt;
+	unsigned int size_min_cmn;
 };
 
 /**
@@ -148,6 +151,21 @@ struct mmc_test_card {
 	struct mmc_test_general_result	*gr;
 };
 
+enum mmc_test_prep_media {
+	MMC_TEST_PREP_NONE = 0,
+	MMC_TEST_PREP_WRITE_FULL = 1 << 0,
+	MMC_TEST_PREP_ERASE = 1 << 1,
+};
+
+struct mmc_test_multiple_rw {
+	unsigned int *bs;
+	unsigned int len;
+	unsigned int size;
+	bool do_write;
+	bool do_nonblock_req;
+	enum mmc_test_prep_media prepare;
+};
+
 /*******************************************************************/
 /*  General helper functions                                       */
 /*******************************************************************/
@@ -307,6 +325,7 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
 	unsigned long max_seg_page_cnt = DIV_ROUND_UP(max_seg_sz, PAGE_SIZE);
 	unsigned long page_cnt = 0;
 	unsigned long limit = nr_free_buffer_pages() >> 4;
+	unsigned int min_cmn = 0;
 	struct mmc_test_mem *mem;
 
 	if (max_page_cnt > limit)
@@ -350,6 +369,12 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
 		mem->arr[mem->cnt].page = page;
 		mem->arr[mem->cnt].order = order;
 		mem->cnt += 1;
+		if (!min_cmn)
+			min_cmn = PAGE_SIZE << order;
+		else
+			min_cmn = min(min_cmn,
+				      (unsigned int) (PAGE_SIZE << order));
+
 		if (max_page_cnt <= (1UL << order))
 			break;
 		max_page_cnt -= 1UL << order;
@@ -360,6 +385,7 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
 			break;
 		}
 	}
+	mem->size_min_cmn = min_cmn;
 
 	return mem;
 
@@ -386,7 +412,6 @@ static int mmc_test_map_sg(struct mmc_test_mem *mem, unsigned long sz,
 	do {
 		for (i = 0; i < mem->cnt; i++) {
 			unsigned long len = PAGE_SIZE << mem->arr[i].order;
-
 			if (len > sz)
 				len = sz;
 			if (len > max_seg_sz)
@@ -725,6 +750,94 @@ static int mmc_test_check_broken_result(struct mmc_test_card *test,
 }
 
 /*
+ * Tests nonblock transfer with certain parameters
+ */
+static void mmc_test_nonblock_reset(struct mmc_request *mrq,
+				    struct mmc_command *cmd,
+				    struct mmc_command *stop,
+				    struct mmc_data *data)
+{
+	memset(mrq, 0, sizeof(struct mmc_request));
+	memset(cmd, 0, sizeof(struct mmc_command));
+	memset(data, 0, sizeof(struct mmc_data));
+	memset(stop, 0, sizeof(struct mmc_command));
+
+	mrq->cmd = cmd;
+	mrq->data = data;
+	mrq->stop = stop;
+}
+static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
+				      struct scatterlist *sg, unsigned sg_len,
+				      unsigned dev_addr, unsigned blocks,
+				      unsigned blksz, int write, int count)
+{
+	struct mmc_request mrq1;
+	struct mmc_command cmd1;
+	struct mmc_command stop1;
+	struct mmc_data data1;
+
+	struct mmc_request mrq2;
+	struct mmc_command cmd2;
+	struct mmc_command stop2;
+	struct mmc_data data2;
+
+	struct mmc_request *cur_mrq;
+	struct mmc_request *prev_mrq;
+	int i;
+	int ret = 0;
+
+	if (!test->card->host->ops->pre_req ||
+		!test->card->host->ops->post_req)
+		return -RESULT_UNSUP_HOST;
+
+	mmc_test_nonblock_reset(&mrq1, &cmd1, &stop1, &data1);
+	mmc_test_nonblock_reset(&mrq2, &cmd2, &stop2, &data2);
+
+	cur_mrq = &mrq1;
+	prev_mrq = NULL;
+
+	for (i = 0; i < count; i++) {
+		mmc_test_prepare_mrq(test, cur_mrq, sg, sg_len, dev_addr,
+				blocks, blksz, write);
+		mmc_pre_req(test->card->host, cur_mrq, !prev_mrq);
+
+		if (prev_mrq) {
+			mmc_wait_for_req_done(prev_mrq);
+			mmc_test_wait_busy(test);
+			ret = mmc_test_check_result(test, prev_mrq);
+			if (ret)
+				goto err;
+		}
+
+		mmc_start_req(test->card->host, cur_mrq);
+
+		if (prev_mrq)
+			mmc_post_req(test->card->host, prev_mrq, 0);
+
+		prev_mrq = cur_mrq;
+		if (cur_mrq == &mrq1) {
+			mmc_test_nonblock_reset(&mrq2, &cmd2, &stop2, &data2);
+			cur_mrq = &mrq2;
+		} else {
+			mmc_test_nonblock_reset(&mrq1, &cmd1, &stop1, &data1);
+			cur_mrq = &mrq1;
+		}
+		dev_addr += blocks;
+	}
+
+	mmc_wait_for_req_done(prev_mrq);
+	mmc_test_wait_busy(test);
+	ret = mmc_test_check_result(test, prev_mrq);
+	if (ret)
+		goto err;
+	mmc_post_req(test->card->host, prev_mrq, 0);
+
+	return ret;
+err:
+	return ret;
+}
+
+/*
  * Tests a basic transfer with certain parameters
  */
 static int mmc_test_simple_transfer(struct mmc_test_card *test,
@@ -1351,14 +1464,17 @@ static int mmc_test_area_transfer(struct mmc_test_card *test,
 }
 
 /*
- * Map and transfer bytes.
+ * Map and transfer bytes for multiple transfers.
  */
-static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
-			    unsigned int dev_addr, int write, int max_scatter,
-			    int timed)
+static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
+				unsigned int dev_addr, int write,
+				int max_scatter, int timed, int count,
+				bool nonblock)
 {
 	struct timespec ts1, ts2;
-	int ret;
+	int ret = 0;
+	int i;
+	struct mmc_test_area *t = &test->area;
 
 	/*
 	 * In the case of a maximally scattered transfer, the maximum transfer
@@ -1382,8 +1498,15 @@ static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
 
 	if (timed)
 		getnstimeofday(&ts1);
+	if (nonblock)
+		ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_len,
+				 dev_addr, t->blocks, 512, write, count);
+	else
+		for (i = 0; i < count && ret == 0; i++) {
+			ret = mmc_test_area_transfer(test, dev_addr, write);
+			dev_addr += sz >> 9;
+		}
 
-	ret = mmc_test_area_transfer(test, dev_addr, write);
 	if (ret)
 		return ret;
 
@@ -1391,11 +1514,19 @@ static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
 		getnstimeofday(&ts2);
 
 	if (timed)
-		mmc_test_print_rate(test, sz, &ts1, &ts2);
+		mmc_test_print_avg_rate(test, sz, count, &ts1, &ts2);
 
 	return 0;
 }
 
+static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
+			    unsigned int dev_addr, int write, int max_scatter,
+			    int timed)
+{
+	return mmc_test_area_io_seq(test, sz, dev_addr, write, max_scatter,
+				    timed, 1, false);
+}
+
 /*
  * Write the test area entirely.
  */
@@ -1956,6 +2087,144 @@ static int mmc_test_large_seq_write_perf(struct mmc_test_card *test)
 	return mmc_test_large_seq_perf(test, 1);
 }
 
+static int mmc_test_rw_multiple(struct mmc_test_card *test,
+				struct mmc_test_multiple_rw *tdata,
+				unsigned int reqsize, unsigned int size)
+{
+	unsigned int dev_addr;
+	struct mmc_test_area *t = &test->area;
+	int ret = 0;
+	int max_reqsize = max(t->mem->size_min_cmn *
+			      min(t->max_segs, t->mem->cnt), t->max_tfr);
+
+	/* Set up test area */
+	if (size > mmc_test_capacity(test->card) / 2 * 512)
+		size = mmc_test_capacity(test->card) / 2 * 512;
+	if (reqsize > max_reqsize)
+		reqsize = max_reqsize;
+	dev_addr = mmc_test_capacity(test->card) / 4;
+	if ((dev_addr & 0xffff0000))
+		dev_addr &= 0xffff0000; /* Round to 64MiB boundary */
+	else
+		dev_addr &= 0xfffff800; /* Round to 1MiB boundary */
+	if (!dev_addr)
+		goto err;
+
+	/* prepare test area */
+	if (mmc_can_erase(test->card) &&
+	    tdata->prepare & MMC_TEST_PREP_ERASE) {
+		ret = mmc_erase(test->card, dev_addr,
+				size / 512, MMC_SECURE_ERASE_ARG);
+		if (ret)
+			ret = mmc_erase(test->card, dev_addr,
+					size / 512, MMC_ERASE_ARG);
+		if (ret)
+			goto err;
+	}
+
+	/* Run test */
+	ret = mmc_test_area_io_seq(test, reqsize, dev_addr,
+				   tdata->do_write, 0, 1, size / reqsize,
+				   tdata->do_nonblock_req);
+	if (ret)
+		goto err;
+
+	return ret;
+ err:
+	printk(KERN_INFO "[%s] error\n", __func__);
+	return ret;
+}
+
+static int mmc_test_rw_multiple_size(struct mmc_test_card *test,
+				     struct mmc_test_multiple_rw *rw)
+{
+	int ret = 0;
+	int i;
+
+	for (i = 0 ; i < rw->len && ret == 0; i++) {
+		ret = mmc_test_rw_multiple(test, rw, rw->bs[i], rw->size);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+/*
+ * Multiple blocking write 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_write_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = 128*1024*1024,
+		.len = ARRAY_SIZE(bs),
+		.do_write = true,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+};
+
+/*
+ * Multiple none blocking write 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_write_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = 128*1024*1024,
+		.len = ARRAY_SIZE(bs),
+		.do_write = true,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
+/*
+ * Multiple blocking read 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_read_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = 128*1024*1024,
+		.len = ARRAY_SIZE(bs),
+		.do_write = false,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
+/*
+ * Multiple none blocking read 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_read_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = 128*1024*1024,
+		.len = ARRAY_SIZE(bs),
+		.do_write = false,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
 static const struct mmc_test_case mmc_test_cases[] = {
 	{
 		.name = "Basic write (no data verification)",
@@ -2223,6 +2492,33 @@ static const struct mmc_test_case mmc_test_cases[] = {
 		.cleanup = mmc_test_area_cleanup,
 	},
 
+	{
+		.name = "Write performance with blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_write_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Write performance with none blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_write_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance with blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_read_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance with none blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_read_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
 };
 
 static DEFINE_MUTEX(mmc_test_lock);
-- 
1.7.4.1

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