From: Niklas Cassel <niklas.cassel@xxxxxxx>
Use a unique test pattern for each BAR in. This makes it easier to
detect/debug address translation issues, since a developer can dump
the backing memory on the EP side, using e.g. devmem, to verify that
the address translation for each BAR is actually correct.
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx>
---
drivers/misc/pci_endpoint_test.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index a765a05f0c64..7ac1922475af 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -263,6 +263,15 @@ static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test)
return false;
}
+static const u32 bar_test_pattern[] = {
+ 0xA0A0A0A0,
+ 0xA1A1A1A1,
+ 0xA2A2A2A2,
+ 0xA3A3A3A3,
+ 0xA4A4A4A4,
+ 0xA5A5A5A5,
+};
+
static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
enum pci_barno barno)
{
@@ -280,11 +289,12 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
size = 0x4;
for (j = 0; j < size; j += 4)
- pci_endpoint_test_bar_writel(test, barno, j, 0xA0A0A0A0);
+ pci_endpoint_test_bar_writel(test, barno, j,
+ bar_test_pattern[barno]);
for (j = 0; j < size; j += 4) {
val = pci_endpoint_test_bar_readl(test, barno, j);
- if (val != 0xA0A0A0A0)
+ if (val != bar_test_pattern[barno])
return false;
}
--
2.43.0
