diff options
Diffstat (limited to 'drivers/spi/spi-loopback-test.c')
| -rw-r--r-- | drivers/spi/spi-loopback-test.c | 154 |
1 files changed, 106 insertions, 48 deletions
diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c index 50e620f4e8fe..f4875f177df0 100644 --- a/drivers/spi/spi-loopback-test.c +++ b/drivers/spi/spi-loopback-test.c @@ -20,11 +20,13 @@ #include <linux/delay.h> #include <linux/kernel.h> +#include <linux/ktime.h> #include <linux/list.h> #include <linux/list_sort.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/printk.h> +#include <linux/vmalloc.h> #include <linux/spi/spi.h> #include "spi-test.h" @@ -55,6 +57,18 @@ module_param(run_only_test, int, 0); MODULE_PARM_DESC(run_only_test, "only run the test with this number (0-based !)"); +/* use vmalloc'ed buffers */ +int use_vmalloc; +module_param(use_vmalloc, int, 0644); +MODULE_PARM_DESC(use_vmalloc, + "use vmalloc'ed buffers instead of kmalloc'ed"); + +/* check rx ranges */ +int check_ranges = 1; +module_param(check_ranges, int, 0644); +MODULE_PARM_DESC(check_ranges, + "checks rx_buffer pattern are valid"); + /* the actual tests to execute */ static struct spi_test spi_tests[] = { { @@ -63,9 +77,9 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_rx_align = ITERATE_ALIGN, + .transfer_count = 1, .transfers = { { - .len = 1, .tx_buf = TX(0), .rx_buf = RX(0), }, @@ -77,9 +91,9 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_rx_align = ITERATE_ALIGN, + .transfer_count = 1, .transfers = { { - .len = 1, .tx_buf = TX(PAGE_SIZE - 4), .rx_buf = RX(PAGE_SIZE - 4), }, @@ -90,9 +104,9 @@ static struct spi_test spi_tests[] = { .fill_option = FILL_COUNT_8, .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, + .transfer_count = 1, .transfers = { { - .len = 1, .tx_buf = TX(0), }, }, @@ -102,9 +116,9 @@ static struct spi_test spi_tests[] = { .fill_option = FILL_COUNT_8, .iterate_len = { ITERATE_MAX_LEN }, .iterate_rx_align = ITERATE_ALIGN, + .transfer_count = 1, .transfers = { { - .len = 1, .rx_buf = RX(0), }, }, @@ -115,13 +129,12 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(0) | BIT(1), + .transfer_count = 2, .transfers = { { - .len = 1, .tx_buf = TX(0), }, { - .len = 1, /* this is why we cant use ITERATE_MAX_LEN */ .tx_buf = TX(SPI_TEST_MAX_SIZE_HALF), }, @@ -132,10 +145,10 @@ static struct spi_test spi_tests[] = { .fill_option = FILL_COUNT_8, .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, - .iterate_transfer_mask = BIT(1), + .iterate_transfer_mask = BIT(0), + .transfer_count = 2, .transfers = { { - .len = 1, .tx_buf = TX(64), }, { @@ -149,14 +162,14 @@ static struct spi_test spi_tests[] = { .fill_option = FILL_COUNT_8, .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, - .iterate_transfer_mask = BIT(0), + .iterate_transfer_mask = BIT(1), + .transfer_count = 2, .transfers = { { .len = 16, .tx_buf = TX(0), }, { - .len = 1, .tx_buf = TX(64), }, }, @@ -167,13 +180,12 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(0) | BIT(1), + .transfer_count = 2, .transfers = { { - .len = 1, .tx_buf = TX(0), }, { - .len = 1, .rx_buf = RX(0), }, }, @@ -184,9 +196,9 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(0), + .transfer_count = 2, .transfers = { { - .len = 1, .tx_buf = TX(0), }, { @@ -201,13 +213,13 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(1), + .transfer_count = 2, .transfers = { { .len = 1, .tx_buf = TX(0), }, { - .len = 1, .rx_buf = RX(0), }, }, @@ -218,14 +230,13 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(0) | BIT(1), + .transfer_count = 2, .transfers = { { - .len = 1, .tx_buf = TX(0), .rx_buf = RX(0), }, { - .len = 1, /* making sure we align without overwrite * the reason we can not use ITERATE_MAX_LEN */ @@ -240,9 +251,9 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(0), + .transfer_count = 2, .transfers = { { - .len = 1, /* making sure we align without overwrite */ .tx_buf = TX(1024), .rx_buf = RX(1024), @@ -261,6 +272,7 @@ static struct spi_test spi_tests[] = { .iterate_len = { ITERATE_MAX_LEN }, .iterate_tx_align = ITERATE_ALIGN, .iterate_transfer_mask = BIT(1), + .transfer_count = 2, .transfers = { { .len = 1, @@ -268,13 +280,31 @@ static struct spi_test spi_tests[] = { .rx_buf = RX(0), }, { - .len = 1, /* making sure we align without overwrite */ .tx_buf = TX(1024), .rx_buf = RX(1024), }, }, }, + { + .description = "two tx+rx transfers - delay after transfer", + .fill_option = FILL_COUNT_8, + .iterate_len = { ITERATE_MAX_LEN }, + .iterate_transfer_mask = BIT(0) | BIT(1), + .transfer_count = 2, + .transfers = { + { + .tx_buf = TX(0), + .rx_buf = RX(0), + .delay_usecs = 1000, + }, + { + .tx_buf = TX(0), + .rx_buf = RX(0), + .delay_usecs = 1000, + }, + }, + }, { /* end of tests sequence */ } }; @@ -482,6 +512,36 @@ static int spi_check_rx_ranges(struct spi_device *spi, return ret; } +static int spi_test_check_elapsed_time(struct spi_device *spi, + struct spi_test *test) +{ + int i; + unsigned long long estimated_time = 0; + unsigned long long delay_usecs = 0; + + for (i = 0; i < test->transfer_count; i++) { + struct spi_transfer *xfer = test->transfers + i; + unsigned long long nbits = (unsigned long long)BITS_PER_BYTE * + xfer->len; + + delay_usecs += xfer->delay_usecs; + if (!xfer->speed_hz) + continue; + estimated_time += div_u64(nbits * NSEC_PER_SEC, xfer->speed_hz); + } + + estimated_time += delay_usecs * NSEC_PER_USEC; + if (test->elapsed_time < estimated_time) { + dev_err(&spi->dev, + "elapsed time %lld ns is shorter than minimum estimated time %lld ns\n", + test->elapsed_time, estimated_time); + + return -EINVAL; + } + + return 0; +} + static int spi_test_check_loopback_result(struct spi_device *spi, struct spi_message *msg, void *tx, void *rx) @@ -492,9 +552,11 @@ static int spi_test_check_loopback_result(struct spi_device *spi, int ret; /* checks rx_buffer pattern are valid with loopback or without */ - ret = spi_check_rx_ranges(spi, msg, rx); - if (ret) - return ret; + if (check_ranges) { + ret = spi_check_rx_ranges(spi, msg, rx); + if (ret) + return ret; + } /* if we run without loopback, then return now */ if (!loopback) @@ -503,11 +565,11 @@ static int spi_test_check_loopback_result(struct spi_device *spi, /* if applicable to transfer check that rx_buf is equal to tx_buf */ list_for_each_entry(xfer, &msg->transfers, transfer_list) { /* if there is no rx, then no check is needed */ - if (!xfer->rx_buf) + if (!xfer->len || !xfer->rx_buf) continue; /* so depending on tx_buf we need to handle things */ if (xfer->tx_buf) { - for (i = 1; i < xfer->len; i++) { + for (i = 0; i < xfer->len; i++) { txb = ((u8 *)xfer->tx_buf)[i]; rxb = ((u8 *)xfer->rx_buf)[i]; if (txb != rxb) @@ -745,15 +807,6 @@ static int spi_test_run_iter(struct spi_device *spi, /* copy the test template to test */ memcpy(&test, testtemplate, sizeof(test)); - /* set up test->transfers to the correct count */ - if (!test.transfer_count) { - for (i = 0; - (i < SPI_TEST_MAX_TRANSFERS) && test.transfers[i].len; - i++) { - test.transfer_count++; - } - } - /* if iterate_transfer_mask is not set, * then set it to first transfer only */ @@ -799,8 +852,7 @@ static int spi_test_run_iter(struct spi_device *spi, /* only when bit in transfer mask is set */ if (!(test.iterate_transfer_mask & BIT(i))) continue; - if (len) - test.transfers[i].len = len; + test.transfers[i].len = len; if (test.transfers[i].tx_buf) test.transfers[i].tx_buf += tx_off; if (test.transfers[i].tx_buf) @@ -830,12 +882,16 @@ int spi_test_execute_msg(struct spi_device *spi, struct spi_test *test, /* only if we do not simulate */ if (!simulate_only) { + ktime_t start; + /* dump the complete message before and after the transfer */ if (dump_messages == 3) spi_test_dump_message(spi, msg, true); + start = ktime_get(); /* run spi message */ ret = spi_sync(spi, msg); + test->elapsed_time = ktime_to_ns(ktime_sub(ktime_get(), start)); if (ret == -ETIMEDOUT) { dev_info(&spi->dev, "spi-message timed out - reruning...\n"); @@ -861,6 +917,10 @@ int spi_test_execute_msg(struct spi_device *spi, struct spi_test *test, /* run rx-buffer tests */ ret = spi_test_check_loopback_result(spi, msg, tx, rx); + if (ret) + goto exit; + + ret = spi_test_check_elapsed_time(spi, test); } /* if requested or on error dump message (including data) */ @@ -910,15 +970,6 @@ int spi_test_run_test(struct spi_device *spi, const struct spi_test *test, /* iterate over all the iterable values using macros * (to make it a bit more readable... */ -#define FOR_EACH_ITERATE(var, defaultvalue) \ - for (idx_##var = -1, var = defaultvalue; \ - ((idx_##var < 0) || \ - ( \ - (idx_##var < SPI_TEST_MAX_ITERATE) && \ - (var = test->iterate_##var[idx_##var]) \ - ) \ - ); \ - idx_##var++) #define FOR_EACH_ALIGNMENT(var) \ for (var = 0; \ var < (test->iterate_##var ? \ @@ -928,7 +979,8 @@ int spi_test_run_test(struct spi_device *spi, const struct spi_test *test, 1); \ var++) - FOR_EACH_ITERATE(len, 0) { + for (idx_len = 0; idx_len < SPI_TEST_MAX_ITERATE && + (len = test->iterate_len[idx_len]) != -1; idx_len++) { FOR_EACH_ALIGNMENT(tx_align) { FOR_EACH_ALIGNMENT(rx_align) { /* and run the iteration */ @@ -965,13 +1017,19 @@ int spi_test_run_tests(struct spi_device *spi, /* allocate rx/tx buffers of 128kB size without devm * in the hope that is on a page boundary */ - rx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); + if (use_vmalloc) + rx = vmalloc(SPI_TEST_MAX_SIZE_PLUS); + else + rx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); if (!rx) { ret = -ENOMEM; goto out; } - tx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); + if (use_vmalloc) + tx = vmalloc(SPI_TEST_MAX_SIZE_PLUS); + else + tx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL); if (!tx) { ret = -ENOMEM; goto out; @@ -999,8 +1057,8 @@ int spi_test_run_tests(struct spi_device *spi, } out: - kfree(rx); - kfree(tx); + kvfree(rx); + kvfree(tx); return ret; } EXPORT_SYMBOL_GPL(spi_test_run_tests); |