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misc: pci_endpoint_test: Add support to test PCI EP in AM654x

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[ Upstream commit 5bb04b19230c02cc1b450b029856cbe093e09908 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kishon Vijay Abraham I 2019-03-25 15:09:46 +05:30 committed by Greg Kroah-Hartman
parent 72892982d3
commit 4b66ab91c0
1 changed files with 17 additions and 0 deletions
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17
drivers/misc/pci_endpoint_test.c
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@ -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, \
@ -593,6 +598,7 @@ 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) {
@ -600,6 +606,8 @@ 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:
@ -792,11 +800,20 @@ 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);