mmc_test: highmem tests
Add a couple of tests to make sure the host driver handles highmem memory pages properly. Unfortunately there is no way to guarantee an allocation below 4 GB in i386, so it might give you addresses that are out of reach for the hardware (OTOH, so will any other highmem allocation in the kernel). Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman
parent
907b2cd6db
commit
2661081f5a
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@ -21,13 +21,17 @@
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#define RESULT_UNSUP_HOST 2
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#define RESULT_UNSUP_CARD 3
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#define BUFFER_SIZE (PAGE_SIZE * 4)
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#define BUFFER_ORDER 2
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#define BUFFER_SIZE (PAGE_SIZE << BUFFER_ORDER)
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struct mmc_test_card {
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struct mmc_card *card;
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u8 scratch[BUFFER_SIZE];
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u8 *buffer;
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#ifdef CONFIG_HIGHMEM
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struct page *highmem;
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#endif
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};
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/*******************************************************************/
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@ -799,6 +803,94 @@ static int mmc_test_multi_xfersize_read(struct mmc_test_card *test)
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return 0;
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}
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#ifdef CONFIG_HIGHMEM
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static int mmc_test_write_high(struct mmc_test_card *test)
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{
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int ret;
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struct scatterlist sg;
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sg_init_table(&sg, 1);
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sg_set_page(&sg, test->highmem, 512, 0);
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ret = mmc_test_transfer(test, &sg, 1, 0, 1, 512, 1);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_read_high(struct mmc_test_card *test)
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{
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int ret;
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struct scatterlist sg;
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sg_init_table(&sg, 1);
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sg_set_page(&sg, test->highmem, 512, 0);
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ret = mmc_test_transfer(test, &sg, 1, 0, 1, 512, 0);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_multi_write_high(struct mmc_test_card *test)
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{
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int ret;
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unsigned int size;
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struct scatterlist sg;
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if (test->card->host->max_blk_count == 1)
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return RESULT_UNSUP_HOST;
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size = PAGE_SIZE * 2;
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size = min(size, test->card->host->max_req_size);
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size = min(size, test->card->host->max_seg_size);
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size = min(size, test->card->host->max_blk_count * 512);
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if (size < 1024)
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return RESULT_UNSUP_HOST;
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sg_init_table(&sg, 1);
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sg_set_page(&sg, test->highmem, size, 0);
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ret = mmc_test_transfer(test, &sg, 1, 0, size/512, 512, 1);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_test_multi_read_high(struct mmc_test_card *test)
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{
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int ret;
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unsigned int size;
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struct scatterlist sg;
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if (test->card->host->max_blk_count == 1)
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return RESULT_UNSUP_HOST;
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size = PAGE_SIZE * 2;
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size = min(size, test->card->host->max_req_size);
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size = min(size, test->card->host->max_seg_size);
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size = min(size, test->card->host->max_blk_count * 512);
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if (size < 1024)
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return RESULT_UNSUP_HOST;
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sg_init_table(&sg, 1);
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sg_set_page(&sg, test->highmem, size, 0);
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ret = mmc_test_transfer(test, &sg, 1, 0, size/512, 512, 0);
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if (ret)
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return ret;
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return 0;
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}
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#endif /* CONFIG_HIGHMEM */
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static const struct mmc_test_case mmc_test_cases[] = {
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{
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.name = "Basic write (no data verification)",
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@ -913,6 +1005,39 @@ static const struct mmc_test_case mmc_test_cases[] = {
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.name = "Correct xfer_size at read (midway failure)",
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.run = mmc_test_multi_xfersize_read,
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},
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#ifdef CONFIG_HIGHMEM
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{
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.name = "Highmem write",
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.prepare = mmc_test_prepare_write,
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.run = mmc_test_write_high,
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.cleanup = mmc_test_cleanup,
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},
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{
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.name = "Highmem read",
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.prepare = mmc_test_prepare_read,
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.run = mmc_test_read_high,
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.cleanup = mmc_test_cleanup,
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},
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{
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.name = "Multi-block highmem write",
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.prepare = mmc_test_prepare_write,
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.run = mmc_test_multi_write_high,
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.cleanup = mmc_test_cleanup,
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},
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{
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.name = "Multi-block highmem read",
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.prepare = mmc_test_prepare_read,
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.run = mmc_test_multi_read_high,
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.cleanup = mmc_test_cleanup,
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},
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#endif /* CONFIG_HIGHMEM */
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};
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static struct mutex mmc_test_lock;
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@ -1014,12 +1139,23 @@ static ssize_t mmc_test_store(struct device *dev,
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test->card = card;
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test->buffer = kzalloc(BUFFER_SIZE, GFP_KERNEL);
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#ifdef CONFIG_HIGHMEM
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test->highmem = alloc_pages(GFP_KERNEL | __GFP_HIGHMEM, BUFFER_ORDER);
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#endif
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#ifdef CONFIG_HIGHMEM
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if (test->buffer && test->highmem) {
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#else
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if (test->buffer) {
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#endif
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mutex_lock(&mmc_test_lock);
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mmc_test_run(test, testcase);
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mutex_unlock(&mmc_test_lock);
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}
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#ifdef CONFIG_HIGHMEM
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__free_pages(test->highmem, BUFFER_ORDER);
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#endif
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kfree(test->buffer);
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kfree(test);
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