test/dm/pci.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2015 Google, Inc
  */

 #include <common.h>
 #include <dm.h>
 #include <asm/io.h>
 #include <asm/test.h>
 #include <dm/test.h>
 #include <test/ut.h>

 /* Test that sandbox PCI works correctly */
 static int dm_test_pci_base(struct unit_test_state *uts)
 {
 	struct udevice *bus;

 	ut_assertok(uclass_get_device(UCLASS_PCI, 0, &bus));

 	return 0;
 }
 DM_TEST(dm_test_pci_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test that sandbox PCI bus numbering and device works correctly */
 static int dm_test_pci_busdev(struct unit_test_state *uts)
 {
 	struct udevice *bus;
 	struct udevice *swap;
 	u16 vendor, device;

 	/* Test bus#0 and its devices */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));

 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x00, 0), &swap));
 	vendor = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
 	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));
 	device = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
 	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

 	/* Test bus#1 and its devices */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));

 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));
 	vendor = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
 	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x0c, 0), &swap));
 	device = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
 	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

 	return 0;
 }
 DM_TEST(dm_test_pci_busdev, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test that we can use the swapcase device correctly */
 static int dm_test_pci_swapcase(struct unit_test_state *uts)
 {
 	struct udevice *swap;
 	ulong io_addr, mem_addr;
 	char *ptr;

 	/* Check that asking for the device 0 automatically fires up PCI */
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x00, 0), &swap));

 	/* First test I/O */
 	io_addr = dm_pci_read_bar32(swap, 0);
 	outb(2, io_addr);
 	ut_asserteq(2, inb(io_addr));

 	/*
 	 * Now test memory mapping - note we must unmap and remap to cause
 	 * the swapcase emulation to see our data and response.
 	 */
 	mem_addr = dm_pci_read_bar32(swap, 1);
 	ptr = map_sysmem(mem_addr, 20);
 	strcpy(ptr, "This is a TesT");
 	unmap_sysmem(ptr);

 	ptr = map_sysmem(mem_addr, 20);
 	ut_asserteq_str("tHIS IS A tESt", ptr);
 	unmap_sysmem(ptr);

 	/* Check that asking for the device 1 automatically fires up PCI */
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));

 	/* First test I/O */
 	io_addr = dm_pci_read_bar32(swap, 0);
 	outb(2, io_addr);
 	ut_asserteq(2, inb(io_addr));

 	/*
 	 * Now test memory mapping - note we must unmap and remap to cause
 	 * the swapcase emulation to see our data and response.
 	 */
 	mem_addr = dm_pci_read_bar32(swap, 1);
 	ptr = map_sysmem(mem_addr, 20);
 	strcpy(ptr, "This is a TesT");
 	unmap_sysmem(ptr);

 	ptr = map_sysmem(mem_addr, 20);
 	ut_asserteq_str("tHIS IS A tESt", ptr);
 	unmap_sysmem(ptr);

 	return 0;
 }
 DM_TEST(dm_test_pci_swapcase, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test that we can dynamically bind the device driver correctly */
 static int dm_test_pci_drvdata(struct unit_test_state *uts)
 {
 	struct udevice *bus, *swap;

 	/* Check that asking for the device automatically fires up PCI */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));

 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));
 	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
 	ut_assertok(dev_of_valid(swap));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x0c, 0), &swap));
 	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
 	ut_assertok(dev_of_valid(swap));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x10, 0), &swap));
 	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
 	ut_assertok(!dev_of_valid(swap));

 	return 0;
 }
 DM_TEST(dm_test_pci_drvdata, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test that devices on PCI bus#2 can be accessed correctly */
 static int dm_test_pci_mixed(struct unit_test_state *uts)
 {
 	/* PCI bus#2 has both statically and dynamic declared devices */
 	struct udevice *bus, *swap;
 	u16 vendor, device;
 	ulong io_addr, mem_addr;
 	char *ptr;

 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 2, &bus));

 	/* Test the dynamic device */
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(2, 0x08, 0), &swap));
 	vendor = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
 	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);

 	/* First test I/O */
 	io_addr = dm_pci_read_bar32(swap, 0);
 	outb(2, io_addr);
 	ut_asserteq(2, inb(io_addr));

 	/*
 	 * Now test memory mapping - note we must unmap and remap to cause
 	 * the swapcase emulation to see our data and response.
 	 */
 	mem_addr = dm_pci_read_bar32(swap, 1);
 	ptr = map_sysmem(mem_addr, 30);
 	strcpy(ptr, "This is a TesT oN dYNAMIc");
 	unmap_sysmem(ptr);

 	ptr = map_sysmem(mem_addr, 30);
 	ut_asserteq_str("tHIS IS A tESt On DynamiC", ptr);
 	unmap_sysmem(ptr);

 	/* Test the static device */
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(2, 0x1f, 0), &swap));
 	device = 0;
 	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
 	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

 	/* First test I/O */
 	io_addr = dm_pci_read_bar32(swap, 0);
 	outb(2, io_addr);
 	ut_asserteq(2, inb(io_addr));

 	/*
 	 * Now test memory mapping - note we must unmap and remap to cause
 	 * the swapcase emulation to see our data and response.
 	 */
 	mem_addr = dm_pci_read_bar32(swap, 1);
 	ptr = map_sysmem(mem_addr, 30);
 	strcpy(ptr, "This is a TesT oN sTATIc");
 	unmap_sysmem(ptr);

 	ptr = map_sysmem(mem_addr, 30);
 	ut_asserteq_str("tHIS IS A tESt On StatiC", ptr);
 	unmap_sysmem(ptr);

 	return 0;
 }
 DM_TEST(dm_test_pci_mixed, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test looking up PCI capability and extended capability */
 static int dm_test_pci_cap(struct unit_test_state *uts)
 {
 	struct udevice *bus, *swap;
 	int cap;

 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));

 	/* look up PCI_CAP_ID_EXP */
 	cap = dm_pci_find_capability(swap, PCI_CAP_ID_EXP);
 	ut_asserteq(PCI_CAP_ID_EXP_OFFSET, cap);

 	/* look up PCI_CAP_ID_PCIX */
 	cap = dm_pci_find_capability(swap, PCI_CAP_ID_PCIX);
 	ut_asserteq(0, cap);

 	/* look up PCI_CAP_ID_MSIX starting from PCI_CAP_ID_PM_OFFSET */
 	cap = dm_pci_find_next_capability(swap, PCI_CAP_ID_PM_OFFSET,
 					  PCI_CAP_ID_MSIX);
 	ut_asserteq(PCI_CAP_ID_MSIX_OFFSET, cap);

 	/* look up PCI_CAP_ID_VNDR starting from PCI_CAP_ID_EXP_OFFSET */
 	cap = dm_pci_find_next_capability(swap, PCI_CAP_ID_EXP_OFFSET,
 					  PCI_CAP_ID_VNDR);
 	ut_asserteq(0, cap);

 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));

 	/* look up PCI_EXT_CAP_ID_DSN */
 	cap = dm_pci_find_ext_capability(swap, PCI_EXT_CAP_ID_DSN);
 	ut_asserteq(PCI_EXT_CAP_ID_DSN_OFFSET, cap);

 	/* look up PCI_EXT_CAP_ID_SRIOV */
 	cap = dm_pci_find_ext_capability(swap, PCI_EXT_CAP_ID_SRIOV);
 	ut_asserteq(0, cap);

 	/* look up PCI_EXT_CAP_ID_DSN starting from PCI_EXT_CAP_ID_ERR_OFFSET */
 	cap = dm_pci_find_next_ext_capability(swap, PCI_EXT_CAP_ID_ERR_OFFSET,
 					      PCI_EXT_CAP_ID_DSN);
 	ut_asserteq(PCI_EXT_CAP_ID_DSN_OFFSET, cap);

 	/* look up PCI_EXT_CAP_ID_RCRB starting from PCI_EXT_CAP_ID_VC_OFFSET */
 	cap = dm_pci_find_next_ext_capability(swap, PCI_EXT_CAP_ID_VC_OFFSET,
 					      PCI_EXT_CAP_ID_RCRB);
 	ut_asserteq(0, cap);

 	return 0;
 }
 DM_TEST(dm_test_pci_cap, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);

 /* Test looking up BARs in EA capability structure */
 static int dm_test_pci_ea(struct unit_test_state *uts)
 {
 	struct udevice *bus, *swap;
 	void *bar;
 	int cap;

 	/*
 	 * use emulated device mapping function, we're not using real physical
 	 * addresses in this test
 	 */
 	sandbox_set_enable_pci_map(true);

 	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));
 	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x01, 0), &swap));

 	/* look up PCI_CAP_ID_EA */
 	cap = dm_pci_find_capability(swap, PCI_CAP_ID_EA);
 	ut_asserteq(PCI_CAP_ID_EA_OFFSET, cap);

 	/* test swap case in BAR 1 */
 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_0, 0);
 	ut_assertnonnull(bar);
 	*(int *)bar = 2; /* swap upper/lower */

 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0);
 	ut_assertnonnull(bar);
 	strcpy(bar, "ea TEST");
 	unmap_sysmem(bar);
 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0);
 	ut_assertnonnull(bar);
 	ut_asserteq_str("EA test", bar);

 	/* test magic values in BARs2, 4;  BAR 3 is n/a */
 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_2, 0);
 	ut_assertnonnull(bar);
 	ut_asserteq(PCI_EA_BAR2_MAGIC, *(u32 *)bar);

 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_3, 0);
 	ut_assertnull(bar);

 	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_4, 0);
 	ut_assertnonnull(bar);
 	ut_asserteq(PCI_EA_BAR4_MAGIC, *(u32 *)bar);

 	return 0;
 }
 DM_TEST(dm_test_pci_ea, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2015 Google, Inc
	*/

	#include <common.h>
	#include <dm.h>
	#include <asm/io.h>
	#include <asm/test.h>
	#include <dm/test.h>
	#include <test/ut.h>

	/* Test that sandbox PCI works correctly */
	static int dm_test_pci_base(struct unit_test_state *uts)
	{
	struct udevice *bus;

	ut_assertok(uclass_get_device(UCLASS_PCI, 0, &bus));

	return 0;
	}
	DM_TEST(dm_test_pci_base, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test that sandbox PCI bus numbering and device works correctly */
	static int dm_test_pci_busdev(struct unit_test_state *uts)
	{
	struct udevice *bus;
	struct udevice *swap;
	u16 vendor, device;

	/* Test bus#0 and its devices */
	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));

	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x00, 0), &swap));
	vendor = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));
	device = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

	/* Test bus#1 and its devices */
	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));

	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));
	vendor = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x0c, 0), &swap));
	device = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

	return 0;
	}
	DM_TEST(dm_test_pci_busdev, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test that we can use the swapcase device correctly */
	static int dm_test_pci_swapcase(struct unit_test_state *uts)
	{
	struct udevice *swap;
	ulong io_addr, mem_addr;
	char *ptr;

	/* Check that asking for the device 0 automatically fires up PCI */
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x00, 0), &swap));

	/* First test I/O */
	io_addr = dm_pci_read_bar32(swap, 0);
	outb(2, io_addr);
	ut_asserteq(2, inb(io_addr));

	/*
	* Now test memory mapping - note we must unmap and remap to cause
	* the swapcase emulation to see our data and response.
	*/
	mem_addr = dm_pci_read_bar32(swap, 1);
	ptr = map_sysmem(mem_addr, 20);
	strcpy(ptr, "This is a TesT");
	unmap_sysmem(ptr);

	ptr = map_sysmem(mem_addr, 20);
	ut_asserteq_str("tHIS IS A tESt", ptr);
	unmap_sysmem(ptr);

	/* Check that asking for the device 1 automatically fires up PCI */
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));

	/* First test I/O */
	io_addr = dm_pci_read_bar32(swap, 0);
	outb(2, io_addr);
	ut_asserteq(2, inb(io_addr));

	/*
	* Now test memory mapping - note we must unmap and remap to cause
	* the swapcase emulation to see our data and response.
	*/
	mem_addr = dm_pci_read_bar32(swap, 1);
	ptr = map_sysmem(mem_addr, 20);
	strcpy(ptr, "This is a TesT");
	unmap_sysmem(ptr);

	ptr = map_sysmem(mem_addr, 20);
	ut_asserteq_str("tHIS IS A tESt", ptr);
	unmap_sysmem(ptr);

	return 0;
	}
	DM_TEST(dm_test_pci_swapcase, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test that we can dynamically bind the device driver correctly */
	static int dm_test_pci_drvdata(struct unit_test_state *uts)
	{
	struct udevice bus, swap;

	/* Check that asking for the device automatically fires up PCI */
	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));

	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));
	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
	ut_assertok(dev_of_valid(swap));
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x0c, 0), &swap));
	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
	ut_assertok(dev_of_valid(swap));
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x10, 0), &swap));
	ut_asserteq(SWAP_CASE_DRV_DATA, swap->driver_data);
	ut_assertok(!dev_of_valid(swap));

	return 0;
	}
	DM_TEST(dm_test_pci_drvdata, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test that devices on PCI bus#2 can be accessed correctly */
	static int dm_test_pci_mixed(struct unit_test_state *uts)
	{
	/* PCI bus#2 has both statically and dynamic declared devices */
	struct udevice bus, swap;
	u16 vendor, device;
	ulong io_addr, mem_addr;
	char *ptr;

	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 2, &bus));

	/* Test the dynamic device */
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(2, 0x08, 0), &swap));
	vendor = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_VENDOR_ID, &vendor));
	ut_asserteq(SANDBOX_PCI_VENDOR_ID, vendor);

	/* First test I/O */
	io_addr = dm_pci_read_bar32(swap, 0);
	outb(2, io_addr);
	ut_asserteq(2, inb(io_addr));

	/*
	* Now test memory mapping - note we must unmap and remap to cause
	* the swapcase emulation to see our data and response.
	*/
	mem_addr = dm_pci_read_bar32(swap, 1);
	ptr = map_sysmem(mem_addr, 30);
	strcpy(ptr, "This is a TesT oN dYNAMIc");
	unmap_sysmem(ptr);

	ptr = map_sysmem(mem_addr, 30);
	ut_asserteq_str("tHIS IS A tESt On DynamiC", ptr);
	unmap_sysmem(ptr);

	/* Test the static device */
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(2, 0x1f, 0), &swap));
	device = 0;
	ut_assertok(dm_pci_read_config16(swap, PCI_DEVICE_ID, &device));
	ut_asserteq(SANDBOX_PCI_SWAP_CASE_EMUL_ID, device);

	/* First test I/O */
	io_addr = dm_pci_read_bar32(swap, 0);
	outb(2, io_addr);
	ut_asserteq(2, inb(io_addr));

	/*
	* Now test memory mapping - note we must unmap and remap to cause
	* the swapcase emulation to see our data and response.
	*/
	mem_addr = dm_pci_read_bar32(swap, 1);
	ptr = map_sysmem(mem_addr, 30);
	strcpy(ptr, "This is a TesT oN sTATIc");
	unmap_sysmem(ptr);

	ptr = map_sysmem(mem_addr, 30);
	ut_asserteq_str("tHIS IS A tESt On StatiC", ptr);
	unmap_sysmem(ptr);

	return 0;
	}
	DM_TEST(dm_test_pci_mixed, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test looking up PCI capability and extended capability */
	static int dm_test_pci_cap(struct unit_test_state *uts)
	{
	struct udevice bus, swap;
	int cap;

	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap));

	/* look up PCI_CAP_ID_EXP */
	cap = dm_pci_find_capability(swap, PCI_CAP_ID_EXP);
	ut_asserteq(PCI_CAP_ID_EXP_OFFSET, cap);

	/* look up PCI_CAP_ID_PCIX */
	cap = dm_pci_find_capability(swap, PCI_CAP_ID_PCIX);
	ut_asserteq(0, cap);

	/* look up PCI_CAP_ID_MSIX starting from PCI_CAP_ID_PM_OFFSET */
	cap = dm_pci_find_next_capability(swap, PCI_CAP_ID_PM_OFFSET,
	PCI_CAP_ID_MSIX);
	ut_asserteq(PCI_CAP_ID_MSIX_OFFSET, cap);

	/* look up PCI_CAP_ID_VNDR starting from PCI_CAP_ID_EXP_OFFSET */
	cap = dm_pci_find_next_capability(swap, PCI_CAP_ID_EXP_OFFSET,
	PCI_CAP_ID_VNDR);
	ut_asserteq(0, cap);

	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 1, &bus));
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &swap));

	/* look up PCI_EXT_CAP_ID_DSN */
	cap = dm_pci_find_ext_capability(swap, PCI_EXT_CAP_ID_DSN);
	ut_asserteq(PCI_EXT_CAP_ID_DSN_OFFSET, cap);

	/* look up PCI_EXT_CAP_ID_SRIOV */
	cap = dm_pci_find_ext_capability(swap, PCI_EXT_CAP_ID_SRIOV);
	ut_asserteq(0, cap);

	/* look up PCI_EXT_CAP_ID_DSN starting from PCI_EXT_CAP_ID_ERR_OFFSET */
	cap = dm_pci_find_next_ext_capability(swap, PCI_EXT_CAP_ID_ERR_OFFSET,
	PCI_EXT_CAP_ID_DSN);
	ut_asserteq(PCI_EXT_CAP_ID_DSN_OFFSET, cap);

	/* look up PCI_EXT_CAP_ID_RCRB starting from PCI_EXT_CAP_ID_VC_OFFSET */
	cap = dm_pci_find_next_ext_capability(swap, PCI_EXT_CAP_ID_VC_OFFSET,
	PCI_EXT_CAP_ID_RCRB);
	ut_asserteq(0, cap);

	return 0;
	}
	DM_TEST(dm_test_pci_cap, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);

	/* Test looking up BARs in EA capability structure */
	static int dm_test_pci_ea(struct unit_test_state *uts)
	{
	struct udevice bus, swap;
	void *bar;
	int cap;

	/*
	* use emulated device mapping function, we're not using real physical
	* addresses in this test
	*/
	sandbox_set_enable_pci_map(true);

	ut_assertok(uclass_get_device_by_seq(UCLASS_PCI, 0, &bus));
	ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x01, 0), &swap));

	/* look up PCI_CAP_ID_EA */
	cap = dm_pci_find_capability(swap, PCI_CAP_ID_EA);
	ut_asserteq(PCI_CAP_ID_EA_OFFSET, cap);

	/* test swap case in BAR 1 */
	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_0, 0);
	ut_assertnonnull(bar);
	(int )bar = 2; /* swap upper/lower */

	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0);
	ut_assertnonnull(bar);
	strcpy(bar, "ea TEST");
	unmap_sysmem(bar);
	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0);
	ut_assertnonnull(bar);
	ut_asserteq_str("EA test", bar);

	/* test magic values in BARs2, 4; BAR 3 is n/a */
	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_2, 0);
	ut_assertnonnull(bar);
	ut_asserteq(PCI_EA_BAR2_MAGIC, (u32 )bar);

	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_3, 0);
	ut_assertnull(bar);

	bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_4, 0);
	ut_assertnonnull(bar);
	ut_asserteq(PCI_EA_BAR4_MAGIC, (u32 )bar);

	return 0;
	}
	DM_TEST(dm_test_pci_ea, DM_TESTF_SCAN_PDATA \| DM_TESTF_SCAN_FDT);