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authorKishon Vijay Abraham I2019-03-25 15:09:46 +0530
committerLorenzo Pieralisi2019-05-01 15:50:13 +0100
commit5bb04b19230c02cc1b450b029856cbe093e09908 (patch)
tree0bc6058c786892ee08e1e6f55eb82b7687709634 /drivers/misc
parent6b7330303a8186fb211357e6d379237fe9d2ece1 (diff)
misc: pci_endpoint_test: Add support to test PCI EP in AM654x
TI's AM654x PCIe EP has a restriction that BAR_0 is mapped to application registers. "PCIe Inbound Address Translation" section in AM65x Sitara Processors TRM (SPRUID7 – April 2018) describes BAR0 as reserved. Configure pci_endpoint_test to use BAR_2 instead. Also set alignment to 64K since "PCIe Subsystem Address Translation" section in TRM indicates minimum ATU window size is 64K. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/pci_endpoint_test.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 29582fe57151..e015e8fa9bd3 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -75,6 +75,11 @@
#define PCI_ENDPOINT_TEST_IRQ_TYPE 0x24
#define PCI_ENDPOINT_TEST_IRQ_NUMBER 0x28
+#define PCI_DEVICE_ID_TI_AM654 0xb00c
+
+#define is_am654_pci_dev(pdev) \
+ ((pdev)->device == PCI_DEVICE_ID_TI_AM654)
+
static DEFINE_IDA(pci_endpoint_test_ida);
#define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
@@ -588,6 +593,7 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,
int ret = -EINVAL;
enum pci_barno bar;
struct pci_endpoint_test *test = to_endpoint_test(file->private_data);
+ struct pci_dev *pdev = test->pdev;
mutex_lock(&test->mutex);
switch (cmd) {
@@ -595,6 +601,8 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,
bar = arg;
if (bar < 0 || bar > 5)
goto ret;
+ if (is_am654_pci_dev(pdev) && bar == BAR_0)
+ goto ret;
ret = pci_endpoint_test_bar(test, bar);
break;
case PCITEST_LEGACY_IRQ:
@@ -785,11 +793,20 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
pci_disable_device(pdev);
}
+static const struct pci_endpoint_test_data am654_data = {
+ .test_reg_bar = BAR_2,
+ .alignment = SZ_64K,
+ .irq_type = IRQ_TYPE_MSI,
+};
+
static const struct pci_device_id pci_endpoint_test_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x) },
{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x81c0) },
{ PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 0xedda) },
+ { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM654),
+ .driver_data = (kernel_ulong_t)&am654_data
+ },
{ }
};
MODULE_DEVICE_TABLE(pci, pci_endpoint_test_tbl);