[U-Boot] [PATCH 3/4 v3] test: dm: Add a test for PCI Enhanced Allocation
Alex Marginean
alexm.osslist at gmail.com
Fri Jun 7 08:24:24 UTC 2019
This test is built on top of the existing swap_case driver. It adds EA
capability structure support to swap_case and uses that to map BARs.
BAR1 works as it used to, swapping upper/lower case. BARs 2,4 map to a
couple of magic values.
Signed-off-by: Alex Marginean <alexm.osslist at gmail.com>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Tested-by: Bin Meng <bmeng.cn at gmail.com>
---
Changes in v2:
- new patch, v1 didn't have a test
Changes in v3:
- renamed sandbox_swap_use_ea function for consistency
- fixed several typos and styling issues
arch/sandbox/dts/test.dts | 8 +++
arch/sandbox/include/asm/test.h | 13 ++++
drivers/misc/swap_case.c | 102 +++++++++++++++++++++++++++++++-
test/dm/pci.c | 49 +++++++++++++++
4 files changed, 171 insertions(+), 1 deletion(-)
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 46d8a56d0f..dd50a951a8 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -434,6 +434,14 @@
compatible = "sandbox,swap-case";
};
};
+ pci at 1,0 {
+ compatible = "pci-generic";
+ reg = <0x0800 0 0 0 0>;
+ emul at 0,0 {
+ compatible = "sandbox,swap-case";
+ use-ea;
+ };
+ };
pci at 1f,0 {
compatible = "pci-generic";
reg = <0xf800 0 0 0 0>;
diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index e956a05262..32125f3037 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -19,6 +19,7 @@
#define PCI_CAP_ID_PM_OFFSET 0x50
#define PCI_CAP_ID_EXP_OFFSET 0x60
#define PCI_CAP_ID_MSIX_OFFSET 0x70
+#define PCI_CAP_ID_EA_OFFSET 0x80
#define PCI_EXT_CAP_ID_ERR_OFFSET 0x100
#define PCI_EXT_CAP_ID_VC_OFFSET 0x200
@@ -30,6 +31,18 @@
#define SANDBOX_CLK_RATE 32768
+/* Macros used to test PCI EA capability structure */
+#define PCI_CAP_EA_BASE_LO0 0x00100000
+#define PCI_CAP_EA_BASE_LO1 0x00110000
+#define PCI_CAP_EA_BASE_LO2 0x00120000
+#define PCI_CAP_EA_BASE_LO4 0x00140000
+#define PCI_CAP_EA_BASE_HI2 0x00020000ULL
+#define PCI_CAP_EA_BASE_HI4 0x00040000ULL
+#define PCI_CAP_EA_SIZE_LO 0x0000ffff
+#define PCI_CAP_EA_SIZE_HI 0x00000010ULL
+#define PCI_EA_BAR2_MAGIC 0x72727272
+#define PCI_EA_BAR4_MAGIC 0x74747474
+
/* System controller driver data */
enum {
SYSCON0 = 32,
diff --git a/drivers/misc/swap_case.c b/drivers/misc/swap_case.c
index fa608cec1b..6afc6d9466 100644
--- a/drivers/misc/swap_case.c
+++ b/drivers/misc/swap_case.c
@@ -61,11 +61,63 @@ static int sandbox_swap_case_get_devfn(struct udevice *dev)
return plat->devfn;
}
+static int sandbox_swap_case_use_ea(struct udevice *dev)
+{
+ return !!ofnode_get_property(dev->node, "use-ea", NULL);
+}
+
+/* Please keep these macros in sync with ea_regs below */
+#define PCI_CAP_ID_EA_SIZE (sizeof(ea_regs) + 4)
+#define PCI_CAP_ID_EA_ENTRY_CNT 4
+/* Hardcoded EA structure, excluding 1st DW. */
+static const u32 ea_regs[] = {
+ /* BEI=0, ES=2, BAR0 32b Base + 32b MaxOffset, I/O space */
+ (2 << 8) | 2,
+ PCI_CAP_EA_BASE_LO0,
+ 0,
+ /* BEI=1, ES=2, BAR1 32b Base + 32b MaxOffset */
+ (1 << 4) | 2,
+ PCI_CAP_EA_BASE_LO1,
+ MEM_TEXT_SIZE - 1,
+ /* BEI=2, ES=3, BAR2 64b Base + 32b MaxOffset */
+ (2 << 4) | 3,
+ PCI_CAP_EA_BASE_LO2 | PCI_EA_IS_64,
+ PCI_CAP_EA_SIZE_LO,
+ PCI_CAP_EA_BASE_HI2,
+ /* BEI=4, ES=4, BAR4 64b Base + 64b MaxOffset */
+ (4 << 4) | 4,
+ PCI_CAP_EA_BASE_LO4 | PCI_EA_IS_64,
+ PCI_CAP_EA_SIZE_LO | PCI_EA_IS_64,
+ PCI_CAP_EA_BASE_HI4,
+ PCI_CAP_EA_SIZE_HI,
+};
+
+static int sandbox_swap_case_read_ea(struct udevice *emul, uint offset,
+ ulong *valuep, enum pci_size_t size)
+{
+ u32 reg;
+
+ offset = offset - PCI_CAP_ID_EA_OFFSET - 4;
+ reg = ea_regs[offset >> 2];
+ reg >>= (offset % 4) * 8;
+
+ *valuep = reg;
+ return 0;
+}
+
static int sandbox_swap_case_read_config(struct udevice *emul, uint offset,
ulong *valuep, enum pci_size_t size)
{
struct swap_case_platdata *plat = dev_get_platdata(emul);
+ /*
+ * The content of the EA capability structure is handled elsewhere to
+ * keep the switch/case below sane
+ */
+ if (offset > PCI_CAP_ID_EA_OFFSET + PCI_CAP_LIST_NEXT &&
+ offset < PCI_CAP_ID_EA_OFFSET + PCI_CAP_ID_EA_SIZE)
+ return sandbox_swap_case_read_ea(emul, offset, valuep, size);
+
switch (offset) {
case PCI_COMMAND:
*valuep = plat->command;
@@ -134,9 +186,21 @@ static int sandbox_swap_case_read_config(struct udevice *emul, uint offset,
*valuep = PCI_CAP_ID_MSIX_OFFSET;
break;
case PCI_CAP_ID_MSIX_OFFSET:
- *valuep = PCI_CAP_ID_MSIX;
+ if (sandbox_swap_case_use_ea(emul))
+ *valuep = (PCI_CAP_ID_EA_OFFSET << 8) | PCI_CAP_ID_MSIX;
+ else
+ *valuep = PCI_CAP_ID_MSIX;
break;
case PCI_CAP_ID_MSIX_OFFSET + PCI_CAP_LIST_NEXT:
+ if (sandbox_swap_case_use_ea(emul))
+ *valuep = PCI_CAP_ID_EA_OFFSET;
+ else
+ *valuep = 0;
+ break;
+ case PCI_CAP_ID_EA_OFFSET:
+ *valuep = (PCI_CAP_ID_EA_ENTRY_CNT << 16) | PCI_CAP_ID_EA;
+ break;
+ case PCI_CAP_ID_EA_OFFSET + PCI_CAP_LIST_NEXT:
*valuep = 0;
break;
case PCI_EXT_CAP_ID_ERR_OFFSET:
@@ -257,6 +321,9 @@ int sandbox_swap_case_write_io(struct udevice *dev, unsigned int addr,
return 0;
}
+static int pci_ea_bar2_magic = PCI_EA_BAR2_MAGIC;
+static int pci_ea_bar4_magic = PCI_EA_BAR4_MAGIC;
+
static int sandbox_swap_case_map_physmem(struct udevice *dev,
phys_addr_t addr, unsigned long *lenp, void **ptrp)
{
@@ -265,9 +332,42 @@ static int sandbox_swap_case_map_physmem(struct udevice *dev,
int barnum;
int ret;
+ if (sandbox_swap_case_use_ea(dev)) {
+ /*
+ * only support mapping base address in EA test for now, we
+ * don't handle mapping an offset inside a BAR. Seems good
+ * enough for the current test.
+ */
+ switch (addr) {
+ case (phys_addr_t)PCI_CAP_EA_BASE_LO0:
+ *ptrp = &priv->op;
+ *lenp = 4;
+ break;
+ case (phys_addr_t)PCI_CAP_EA_BASE_LO1:
+ *ptrp = priv->mem_text;
+ *lenp = barinfo[1].size - 1;
+ break;
+ case (phys_addr_t)((PCI_CAP_EA_BASE_HI2 << 32) |
+ PCI_CAP_EA_BASE_LO2):
+ *ptrp = &pci_ea_bar2_magic;
+ *lenp = PCI_CAP_EA_SIZE_LO;
+ break;
+ case (phys_addr_t)((PCI_CAP_EA_BASE_HI4 << 32) |
+ PCI_CAP_EA_BASE_LO4):
+ *ptrp = &pci_ea_bar4_magic;
+ *lenp = (PCI_CAP_EA_SIZE_HI << 32) |
+ PCI_CAP_EA_SIZE_LO;
+ break;
+ default:
+ return -ENOENT;
+ }
+ return 0;
+ }
+
ret = sandbox_swap_case_find_bar(dev, addr, &barnum, &offset);
if (ret)
return ret;
+
if (barnum == 1) {
*ptrp = priv->mem_text + offset;
avail = barinfo[1].size - offset;
diff --git a/test/dm/pci.c b/test/dm/pci.c
index a1febd54b7..c325f6600e 100644
--- a/test/dm/pci.c
+++ b/test/dm/pci.c
@@ -245,3 +245,52 @@ static int dm_test_pci_cap(struct unit_test_state *uts)
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);
--
2.17.1
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