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Diffstat (limited to 'tools/testing/cxl/test/cxl.c')
-rw-r--r--tools/testing/cxl/test/cxl.c330
1 files changed, 265 insertions, 65 deletions
diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index 736d99006fb7..431f2bddf6c8 100644
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -8,16 +8,25 @@
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/mm.h>
+#include <cxlmem.h>
#include "mock.h"
-#define NR_CXL_HOST_BRIDGES 4
+#define NR_CXL_HOST_BRIDGES 2
#define NR_CXL_ROOT_PORTS 2
+#define NR_CXL_SWITCH_PORTS 2
+#define NR_CXL_PORT_DECODERS 2
static struct platform_device *cxl_acpi;
static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
static struct platform_device
*cxl_root_port[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS];
-struct platform_device *cxl_mem[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS];
+static struct platform_device
+ *cxl_switch_uport[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS];
+static struct platform_device
+ *cxl_switch_dport[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS *
+ NR_CXL_SWITCH_PORTS];
+struct platform_device
+ *cxl_mem[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS * NR_CXL_SWITCH_PORTS];
static struct acpi_device acpi0017_mock;
static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES] = {
@@ -27,12 +36,6 @@ static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES] = {
[1] = {
.handle = &host_bridge[1],
},
- [2] = {
- .handle = &host_bridge[2],
- },
- [3] = {
- .handle = &host_bridge[3],
- },
};
static bool is_mock_dev(struct device *dev)
@@ -70,7 +73,7 @@ static struct {
} cfmws0;
struct {
struct acpi_cedt_cfmws cfmws;
- u32 target[4];
+ u32 target[2];
} cfmws1;
struct {
struct acpi_cedt_cfmws cfmws;
@@ -78,7 +81,7 @@ static struct {
} cfmws2;
struct {
struct acpi_cedt_cfmws cfmws;
- u32 target[4];
+ u32 target[2];
} cfmws3;
} __packed mock_cedt = {
.cedt = {
@@ -104,22 +107,6 @@ static struct {
.uid = 1,
.cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
},
- .chbs[2] = {
- .header = {
- .type = ACPI_CEDT_TYPE_CHBS,
- .length = sizeof(mock_cedt.chbs[0]),
- },
- .uid = 2,
- .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
- },
- .chbs[3] = {
- .header = {
- .type = ACPI_CEDT_TYPE_CHBS,
- .length = sizeof(mock_cedt.chbs[0]),
- },
- .uid = 3,
- .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
- },
.cfmws0 = {
.cfmws = {
.header = {
@@ -141,14 +128,14 @@ static struct {
.type = ACPI_CEDT_TYPE_CFMWS,
.length = sizeof(mock_cedt.cfmws1),
},
- .interleave_ways = 2,
+ .interleave_ways = 1,
.granularity = 4,
.restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
.qtg_id = 1,
- .window_size = SZ_256M * 4,
+ .window_size = SZ_256M * 2,
},
- .target = { 0, 1, 2, 3 },
+ .target = { 0, 1, },
},
.cfmws2 = {
.cfmws = {
@@ -171,14 +158,14 @@ static struct {
.type = ACPI_CEDT_TYPE_CFMWS,
.length = sizeof(mock_cedt.cfmws3),
},
- .interleave_ways = 2,
+ .interleave_ways = 1,
.granularity = 4,
.restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
ACPI_CEDT_CFMWS_RESTRICT_PMEM,
.qtg_id = 3,
- .window_size = SZ_256M * 4,
+ .window_size = SZ_256M * 2,
},
- .target = { 0, 1, 2, 3 },
+ .target = { 0, 1, },
},
};
@@ -317,6 +304,30 @@ static bool is_mock_bridge(struct device *dev)
for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++)
if (dev == &cxl_host_bridge[i]->dev)
return true;
+ return false;
+}
+
+static bool is_mock_port(struct device *dev)
+{
+ int i;
+
+ if (is_mock_bridge(dev))
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++)
+ if (dev == &cxl_root_port[i]->dev)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++)
+ if (dev == &cxl_switch_uport[i]->dev)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++)
+ if (dev == &cxl_switch_dport[i]->dev)
+ return true;
+
+ if (is_cxl_memdev(dev))
+ return is_mock_dev(dev->parent);
return false;
}
@@ -358,34 +369,8 @@ static struct acpi_pci_root mock_pci_root[NR_CXL_HOST_BRIDGES] = {
[1] = {
.bus = &mock_pci_bus[1],
},
- [2] = {
- .bus = &mock_pci_bus[2],
- },
- [3] = {
- .bus = &mock_pci_bus[3],
- },
};
-static struct platform_device *mock_cxl_root_port(struct pci_bus *bus, int index)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(mock_pci_bus); i++)
- if (bus == &mock_pci_bus[i])
- return cxl_root_port[index + i * NR_CXL_ROOT_PORTS];
- return NULL;
-}
-
-static bool is_mock_port(struct platform_device *pdev)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++)
- if (pdev == cxl_root_port[i])
- return true;
- return false;
-}
-
static bool is_mock_bus(struct pci_bus *bus)
{
int i;
@@ -405,16 +390,166 @@ static struct acpi_pci_root *mock_acpi_pci_find_root(acpi_handle handle)
return &mock_pci_root[host_bridge_index(adev)];
}
+static struct cxl_hdm *mock_cxl_setup_hdm(struct cxl_port *port)
+{
+ struct cxl_hdm *cxlhdm = devm_kzalloc(&port->dev, sizeof(*cxlhdm), GFP_KERNEL);
+
+ if (!cxlhdm)
+ return ERR_PTR(-ENOMEM);
+
+ cxlhdm->port = port;
+ return cxlhdm;
+}
+
+static int mock_cxl_add_passthrough_decoder(struct cxl_port *port)
+{
+ dev_err(&port->dev, "unexpected passthrough decoder for cxl_test\n");
+ return -EOPNOTSUPP;
+}
+
+
+struct target_map_ctx {
+ int *target_map;
+ int index;
+ int target_count;
+};
+
+static int map_targets(struct device *dev, void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct target_map_ctx *ctx = data;
+
+ ctx->target_map[ctx->index++] = pdev->id;
+
+ if (ctx->index > ctx->target_count) {
+ dev_WARN_ONCE(dev, 1, "too many targets found?\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static int mock_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm)
+{
+ struct cxl_port *port = cxlhdm->port;
+ struct cxl_port *parent_port = to_cxl_port(port->dev.parent);
+ int target_count, i;
+
+ if (is_cxl_endpoint(port))
+ target_count = 0;
+ else if (is_cxl_root(parent_port))
+ target_count = NR_CXL_ROOT_PORTS;
+ else
+ target_count = NR_CXL_SWITCH_PORTS;
+
+ for (i = 0; i < NR_CXL_PORT_DECODERS; i++) {
+ int target_map[CXL_DECODER_MAX_INTERLEAVE] = { 0 };
+ struct target_map_ctx ctx = {
+ .target_map = target_map,
+ .target_count = target_count,
+ };
+ struct cxl_decoder *cxld;
+ int rc;
+
+ if (target_count)
+ cxld = cxl_switch_decoder_alloc(port, target_count);
+ else
+ cxld = cxl_endpoint_decoder_alloc(port);
+ if (IS_ERR(cxld)) {
+ dev_warn(&port->dev,
+ "Failed to allocate the decoder\n");
+ return PTR_ERR(cxld);
+ }
+
+ cxld->decoder_range = (struct range) {
+ .start = 0,
+ .end = -1,
+ };
+
+ cxld->flags = CXL_DECODER_F_ENABLE;
+ cxld->interleave_ways = min_not_zero(target_count, 1);
+ cxld->interleave_granularity = SZ_4K;
+ cxld->target_type = CXL_DECODER_EXPANDER;
+
+ if (target_count) {
+ rc = device_for_each_child(port->uport, &ctx,
+ map_targets);
+ if (rc) {
+ put_device(&cxld->dev);
+ return rc;
+ }
+ }
+
+ rc = cxl_decoder_add_locked(cxld, target_map);
+ if (rc) {
+ put_device(&cxld->dev);
+ dev_err(&port->dev, "Failed to add decoder\n");
+ return rc;
+ }
+
+ rc = cxl_decoder_autoremove(&port->dev, cxld);
+ if (rc)
+ return rc;
+ dev_dbg(&cxld->dev, "Added to port %s\n", dev_name(&port->dev));
+ }
+
+ return 0;
+}
+
+static int mock_cxl_port_enumerate_dports(struct cxl_port *port)
+{
+ struct device *dev = &port->dev;
+ struct platform_device **array;
+ int i, array_size;
+
+ if (port->depth == 1) {
+ array_size = ARRAY_SIZE(cxl_root_port);
+ array = cxl_root_port;
+ } else if (port->depth == 2) {
+ array_size = ARRAY_SIZE(cxl_switch_dport);
+ array = cxl_switch_dport;
+ } else {
+ dev_WARN_ONCE(&port->dev, 1, "unexpected depth %d\n",
+ port->depth);
+ return -ENXIO;
+ }
+
+ for (i = 0; i < array_size; i++) {
+ struct platform_device *pdev = array[i];
+ struct cxl_dport *dport;
+
+ if (pdev->dev.parent != port->uport)
+ continue;
+
+ dport = devm_cxl_add_dport(port, &pdev->dev, pdev->id,
+ CXL_RESOURCE_NONE);
+
+ if (IS_ERR(dport)) {
+ dev_err(dev, "failed to add dport: %s (%ld)\n",
+ dev_name(&pdev->dev), PTR_ERR(dport));
+ return PTR_ERR(dport);
+ }
+
+ dev_dbg(dev, "add dport%d: %s\n", pdev->id,
+ dev_name(&pdev->dev));
+ }
+
+ return 0;
+}
+
static struct cxl_mock_ops cxl_mock_ops = {
.is_mock_adev = is_mock_adev,
.is_mock_bridge = is_mock_bridge,
.is_mock_bus = is_mock_bus,
.is_mock_port = is_mock_port,
.is_mock_dev = is_mock_dev,
- .mock_port = mock_cxl_root_port,
.acpi_table_parse_cedt = mock_acpi_table_parse_cedt,
.acpi_evaluate_integer = mock_acpi_evaluate_integer,
.acpi_pci_find_root = mock_acpi_pci_find_root,
+ .devm_cxl_port_enumerate_dports = mock_cxl_port_enumerate_dports,
+ .devm_cxl_setup_hdm = mock_cxl_setup_hdm,
+ .devm_cxl_add_passthrough_decoder = mock_cxl_add_passthrough_decoder,
+ .devm_cxl_enumerate_decoders = mock_cxl_enumerate_decoders,
.list = LIST_HEAD_INIT(cxl_mock_ops.list),
};
@@ -506,12 +641,17 @@ static __init int cxl_test_init(void)
platform_device_put(pdev);
goto err_bridge;
}
+
cxl_host_bridge[i] = pdev;
+ rc = sysfs_create_link(&pdev->dev.kobj, &pdev->dev.kobj,
+ "physical_node");
+ if (rc)
+ goto err_bridge;
}
for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++) {
struct platform_device *bridge =
- cxl_host_bridge[i / NR_CXL_ROOT_PORTS];
+ cxl_host_bridge[i % ARRAY_SIZE(cxl_host_bridge)];
struct platform_device *pdev;
pdev = platform_device_alloc("cxl_root_port", i);
@@ -527,15 +667,52 @@ static __init int cxl_test_init(void)
cxl_root_port[i] = pdev;
}
- BUILD_BUG_ON(ARRAY_SIZE(cxl_mem) != ARRAY_SIZE(cxl_root_port));
+ BUILD_BUG_ON(ARRAY_SIZE(cxl_switch_uport) != ARRAY_SIZE(cxl_root_port));
+ for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++) {
+ struct platform_device *root_port = cxl_root_port[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_switch_uport", i);
+ if (!pdev)
+ goto err_port;
+ pdev->dev.parent = &root_port->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_uport;
+ }
+ cxl_switch_uport[i] = pdev;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) {
+ struct platform_device *uport =
+ cxl_switch_uport[i % ARRAY_SIZE(cxl_switch_uport)];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_switch_dport", i);
+ if (!pdev)
+ goto err_port;
+ pdev->dev.parent = &uport->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_dport;
+ }
+ cxl_switch_dport[i] = pdev;
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(cxl_mem) != ARRAY_SIZE(cxl_switch_dport));
for (i = 0; i < ARRAY_SIZE(cxl_mem); i++) {
- struct platform_device *port = cxl_root_port[i];
+ struct platform_device *dport = cxl_switch_dport[i];
struct platform_device *pdev;
pdev = alloc_memdev(i);
if (!pdev)
goto err_mem;
- pdev->dev.parent = &port->dev;
+ pdev->dev.parent = &dport->dev;
+ set_dev_node(&pdev->dev, i % 2);
rc = platform_device_add(pdev);
if (rc) {
@@ -563,12 +740,24 @@ err_add:
err_mem:
for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--)
platform_device_unregister(cxl_mem[i]);
+err_dport:
+ for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_switch_dport[i]);
+err_uport:
+ for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_switch_uport[i]);
err_port:
for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--)
platform_device_unregister(cxl_root_port[i]);
err_bridge:
- for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--)
+ for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_host_bridge[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "physical_node");
platform_device_unregister(cxl_host_bridge[i]);
+ }
err_populate:
depopulate_all_mock_resources();
err_gen_pool_add:
@@ -585,10 +774,20 @@ static __exit void cxl_test_exit(void)
platform_device_unregister(cxl_acpi);
for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--)
platform_device_unregister(cxl_mem[i]);
+ for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_switch_dport[i]);
+ for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_switch_uport[i]);
for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--)
platform_device_unregister(cxl_root_port[i]);
- for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--)
+ for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_host_bridge[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "physical_node");
platform_device_unregister(cxl_host_bridge[i]);
+ }
depopulate_all_mock_resources();
gen_pool_destroy(cxl_mock_pool);
unregister_cxl_mock_ops(&cxl_mock_ops);
@@ -598,3 +797,4 @@ module_init(cxl_test_init);
module_exit(cxl_test_exit);
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(ACPI);
+MODULE_IMPORT_NS(CXL);