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Subject[PATCH v2 4/5] tools: PCI: Add 'd' command line option to support DMA
Date
Add a new command line option 'd' to use DMA for data transfers.
It should be used with read, write or copy commands.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
include/uapi/linux/pcitest.h | 5 +++++
tools/pci/pcitest.c | 20 ++++++++++++++++----
2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/include/uapi/linux/pcitest.h b/include/uapi/linux/pcitest.h
index cbf422e56696..1a63999e3deb 100644
--- a/include/uapi/linux/pcitest.h
+++ b/include/uapi/linux/pcitest.h
@@ -20,4 +20,9 @@
#define PCITEST_SET_IRQTYPE _IOW('P', 0x8, int)
#define PCITEST_GET_IRQTYPE _IO('P', 0x9)

+struct pci_endpoint_test_xfer_param {
+ unsigned long size;
+ bool use_dma;
+};
+
#endif /* __UAPI_LINUX_PCITEST_H */
diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
index 32b7c6f9043d..be79ec10cefc 100644
--- a/tools/pci/pcitest.c
+++ b/tools/pci/pcitest.c
@@ -34,10 +34,12 @@ struct pci_test {
bool write;
bool copy;
unsigned long size;
+ bool use_dma;
};

static int run_test(struct pci_test *test)
{
+ struct pci_endpoint_test_xfer_param param;
int ret = -EINVAL;
int fd;

@@ -102,7 +104,9 @@ static int run_test(struct pci_test *test)
}

if (test->write) {
- ret = ioctl(fd, PCITEST_WRITE, test->size);
+ param.size = test->size;
+ param.use_dma = test->use_dma;
+ ret = ioctl(fd, PCITEST_WRITE, &param);
fprintf(stdout, "WRITE (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@@ -111,7 +115,9 @@ static int run_test(struct pci_test *test)
}

if (test->read) {
- ret = ioctl(fd, PCITEST_READ, test->size);
+ param.size = test->size;
+ param.use_dma = test->use_dma;
+ ret = ioctl(fd, PCITEST_READ, &param);
fprintf(stdout, "READ (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@@ -120,7 +126,9 @@ static int run_test(struct pci_test *test)
}

if (test->copy) {
- ret = ioctl(fd, PCITEST_COPY, test->size);
+ param.size = test->size;
+ param.use_dma = test->use_dma;
+ ret = ioctl(fd, PCITEST_COPY, &param);
fprintf(stdout, "COPY (%7ld bytes):\t\t", test->size);
if (ret < 0)
fprintf(stdout, "TEST FAILED\n");
@@ -153,7 +161,7 @@ int main(int argc, char **argv)
/* set default endpoint device */
test->device = "/dev/pci-endpoint-test.0";

- while ((c = getopt(argc, argv, "D:b:m:x:i:Ilhrwcs:")) != EOF)
+ while ((c = getopt(argc, argv, "D:b:m:x:i:dIlhrwcs:")) != EOF)
switch (c) {
case 'D':
test->device = optarg;
@@ -197,6 +205,9 @@ int main(int argc, char **argv)
case 's':
test->size = strtoul(optarg, NULL, 0);
continue;
+ case 'd':
+ test->use_dma = true;
+ continue;
case 'h':
default:
usage:
@@ -209,6 +220,7 @@ int main(int argc, char **argv)
"\t-x <msix num> \tMSI-X test (msix number between 1..2048)\n"
"\t-i <irq type> \tSet IRQ type (0 - Legacy, 1 - MSI, 2 - MSI-X)\n"
"\t-I Get current IRQ type configured\n"
+ "\t-d Use DMA\n"
"\t-l Legacy IRQ test\n"
"\t-r Read buffer test\n"
"\t-w Write buffer test\n"
--
2.17.1
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