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u-boot/test/dm/pci.c
Andrew Scull 12507a2d22 pci: Map bars with offset and length 
Evolve dm_pci_map_bar() to include an offset and length parameter. These
allow a portion of the memory to be mapped and range checks to be
applied.

Passing both the offset and length as zero results in the previous
behaviour and this is used to migrate the previous callers.

Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2022-05-03 15:50:46 -04:00

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// 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/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, UT_TESTF_SCAN_PDATA | UT_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, UT_TESTF_SCAN_PDATA | UT_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, UT_TESTF_SCAN_PDATA | UT_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_has_ofnode(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_has_ofnode(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_has_ofnode(swap));
return 0;
}
DM_TEST(dm_test_pci_drvdata, UT_TESTF_SCAN_PDATA | UT_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, UT_TESTF_SCAN_PDATA | UT_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, UT_TESTF_SCAN_PDATA | UT_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, 0, 0);
ut_assertnonnull(bar);
*(int *)bar = 2; /* swap upper/lower */
bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0, 0, 0);
ut_assertnonnull(bar);
strcpy(bar, "ea TEST");
unmap_sysmem(bar);
bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_1, 0, 0, 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, 0, 0);
ut_assertnonnull(bar);
ut_asserteq(PCI_EA_BAR2_MAGIC, *(u32 *)bar);
bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_3, 0, 0, 0);
ut_assertnull(bar);
bar = dm_pci_map_bar(swap, PCI_BASE_ADDRESS_4, 0, 0, 0);
ut_assertnonnull(bar);
ut_asserteq(PCI_EA_BAR4_MAGIC, *(u32 *)bar);
return 0;
}
DM_TEST(dm_test_pci_ea, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/* Test the dev_read_addr_pci() function */
static int dm_test_pci_addr_flat(struct unit_test_state *uts)
{
struct udevice *swap1f, *swap1;
ulong io_addr, mem_addr;
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap1f));
io_addr = dm_pci_read_bar32(swap1f, 0);
ut_asserteq(io_addr, dev_read_addr_pci(swap1f));
/*
* This device has both I/O and MEM spaces but the MEM space appears
* first
*/
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1, 0), &swap1));
mem_addr = dm_pci_read_bar32(swap1, 1);
ut_asserteq(mem_addr, dev_read_addr_pci(swap1));
return 0;
}
DM_TEST(dm_test_pci_addr_flat, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT |
UT_TESTF_FLAT_TREE);
/*
* Test the dev_read_addr_pci() function with livetree. That function is
* not currently fully implemented, in that it fails to return the BAR address.
* Once that is implemented this test can be removed and dm_test_pci_addr_flat()
* can be used for both flattree and livetree by removing the UT_TESTF_FLAT_TREE
* flag above.
*/
static int dm_test_pci_addr_live(struct unit_test_state *uts)
{
struct udevice *swap1f, *swap1;
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &swap1f));
ut_asserteq_64(FDT_ADDR_T_NONE, dev_read_addr_pci(swap1f));
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1, 0), &swap1));
ut_asserteq_64(FDT_ADDR_T_NONE, dev_read_addr_pci(swap1));
return 0;
}
DM_TEST(dm_test_pci_addr_live, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT |
UT_TESTF_LIVE_TREE);
/* Test device_is_on_pci_bus() */
static int dm_test_pci_on_bus(struct unit_test_state *uts)
{
struct udevice *dev;
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(0, 0x1f, 0), &dev));
ut_asserteq(true, device_is_on_pci_bus(dev));
ut_asserteq(false, device_is_on_pci_bus(dev_get_parent(dev)));
ut_asserteq(true, device_is_on_pci_bus(dev));
return 0;
}
DM_TEST(dm_test_pci_on_bus, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/*
* Test support for multiple memory regions enabled via
* CONFIG_PCI_REGION_MULTI_ENTRY. When this feature is not enabled,
* only the last region of one type is stored. In this test-case,
* we have 2 memory regions, the first at 0x3000.0000 and the 2nd
* at 0x3100.0000. A correct test results now in BAR1 located at
* 0x3000.0000.
*/
static int dm_test_pci_region_multi(struct unit_test_state *uts)
{
struct udevice *dev;
ulong mem_addr;
/* Test memory BAR1 on bus#1 */
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &dev));
mem_addr = dm_pci_read_bar32(dev, 1);
ut_asserteq(mem_addr, 0x30000000);
return 0;
}
DM_TEST(dm_test_pci_region_multi, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/*
* Test the translation of PCI bus addresses to physical addresses using the
* ranges from bus#1.
*/
static int dm_test_pci_bus_to_phys(struct unit_test_state *uts)
{
struct udevice *dev;
phys_addr_t phys_addr;
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &dev));
/* Before any of the ranges. */
phys_addr = dm_pci_bus_to_phys(dev, 0x20000000, 0x400, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
/* Identity range: whole, start, mid, end */
phys_addr = dm_pci_bus_to_phys(dev, 0x2ffff000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x30000000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0x30000000, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x30000000, 0x1000, PCI_REGION_MEM);
ut_asserteq(0x30000000, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x30000abc, 0x12, PCI_REGION_MEM);
ut_asserteq(0x30000abc, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x30000800, 0x1800, PCI_REGION_MEM);
ut_asserteq(0x30000800, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x30008000, 0x1801, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
/* Translated range: whole, start, mid, end */
phys_addr = dm_pci_bus_to_phys(dev, 0x30fff000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x31000000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0x3e000000, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x31000000, 0x1000, PCI_REGION_MEM);
ut_asserteq(0x3e000000, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x31000abc, 0x12, PCI_REGION_MEM);
ut_asserteq(0x3e000abc, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x31000800, 0x1800, PCI_REGION_MEM);
ut_asserteq(0x3e000800, phys_addr);
phys_addr = dm_pci_bus_to_phys(dev, 0x31008000, 0x1801, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
/* Beyond all of the ranges. */
phys_addr = dm_pci_bus_to_phys(dev, 0x32000000, 0x400, PCI_REGION_MEM);
ut_asserteq(0, phys_addr);
return 0;
}
DM_TEST(dm_test_pci_bus_to_phys, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/*
* Test the translation of physical addresses to PCI bus addresses using the
* ranges from bus#1.
*/
static int dm_test_pci_phys_to_bus(struct unit_test_state *uts)
{
struct udevice *dev;
pci_addr_t pci_addr;
ut_assertok(dm_pci_bus_find_bdf(PCI_BDF(1, 0x08, 0), &dev));
/* Before any of the ranges. */
pci_addr = dm_pci_phys_to_bus(dev, 0x20000000, 0x400, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
/* Identity range: partial overlap, whole, start, mid, end */
pci_addr = dm_pci_phys_to_bus(dev, 0x2ffff000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x30000000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0x30000000, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x30000000, 0x1000, PCI_REGION_MEM);
ut_asserteq(0x30000000, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x30000abc, 0x12, PCI_REGION_MEM);
ut_asserteq(0x30000abc, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x30000800, 0x1800, PCI_REGION_MEM);
ut_asserteq(0x30000800, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x30008000, 0x1801, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
/* Translated range: partial overlap, whole, start, mid, end */
pci_addr = dm_pci_phys_to_bus(dev, 0x3dfff000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x3e000000, 0x2000, PCI_REGION_MEM);
ut_asserteq(0x31000000, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x3e000000, 0x1000, PCI_REGION_MEM);
ut_asserteq(0x31000000, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x3e000abc, 0x12, PCI_REGION_MEM);
ut_asserteq(0x31000abc, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x3e000800, 0x1800, PCI_REGION_MEM);
ut_asserteq(0x31000800, pci_addr);
pci_addr = dm_pci_phys_to_bus(dev, 0x3e008000, 0x1801, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
/* Beyond all of the ranges. */
pci_addr = dm_pci_phys_to_bus(dev, 0x3f000000, 0x400, PCI_REGION_MEM);
ut_asserteq(0, pci_addr);
return 0;
}
DM_TEST(dm_test_pci_phys_to_bus, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
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