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-rw-r--r--tools/testing/cxl/Kbuild53
-rw-r--r--tools/testing/cxl/config_check.c13
-rw-r--r--tools/testing/cxl/mock_acpi.c35
-rw-r--r--tools/testing/cxl/test/Kbuild10
-rw-r--r--tools/testing/cxl/test/cxl.c1080
-rw-r--r--tools/testing/cxl/test/mem.c310
-rw-r--r--tools/testing/cxl/test/mock.c229
-rw-r--r--tools/testing/cxl/test/mock.h31
8 files changed, 1761 insertions, 0 deletions
diff --git a/tools/testing/cxl/Kbuild b/tools/testing/cxl/Kbuild
new file mode 100644
index 000000000000..500be85729cc
--- /dev/null
+++ b/tools/testing/cxl/Kbuild
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0
+ldflags-y += --wrap=acpi_table_parse_cedt
+ldflags-y += --wrap=is_acpi_device_node
+ldflags-y += --wrap=acpi_evaluate_integer
+ldflags-y += --wrap=acpi_pci_find_root
+ldflags-y += --wrap=nvdimm_bus_register
+ldflags-y += --wrap=devm_cxl_port_enumerate_dports
+ldflags-y += --wrap=devm_cxl_setup_hdm
+ldflags-y += --wrap=devm_cxl_add_passthrough_decoder
+ldflags-y += --wrap=devm_cxl_enumerate_decoders
+ldflags-y += --wrap=cxl_await_media_ready
+ldflags-y += --wrap=cxl_hdm_decode_init
+
+DRIVERS := ../../../drivers
+CXL_SRC := $(DRIVERS)/cxl
+CXL_CORE_SRC := $(DRIVERS)/cxl/core
+ccflags-y := -I$(srctree)/drivers/cxl/
+ccflags-y += -D__mock=__weak
+
+obj-m += cxl_acpi.o
+
+cxl_acpi-y := $(CXL_SRC)/acpi.o
+cxl_acpi-y += mock_acpi.o
+cxl_acpi-y += config_check.o
+
+obj-m += cxl_pmem.o
+
+cxl_pmem-y := $(CXL_SRC)/pmem.o
+cxl_pmem-y += config_check.o
+
+obj-m += cxl_port.o
+
+cxl_port-y := $(CXL_SRC)/port.o
+cxl_port-y += config_check.o
+
+obj-m += cxl_mem.o
+
+cxl_mem-y := $(CXL_SRC)/mem.o
+cxl_mem-y += config_check.o
+
+obj-m += cxl_core.o
+
+cxl_core-y := $(CXL_CORE_SRC)/port.o
+cxl_core-y += $(CXL_CORE_SRC)/pmem.o
+cxl_core-y += $(CXL_CORE_SRC)/regs.o
+cxl_core-y += $(CXL_CORE_SRC)/memdev.o
+cxl_core-y += $(CXL_CORE_SRC)/mbox.o
+cxl_core-y += $(CXL_CORE_SRC)/pci.o
+cxl_core-y += $(CXL_CORE_SRC)/hdm.o
+cxl_core-$(CONFIG_CXL_REGION) += $(CXL_CORE_SRC)/region.o
+cxl_core-y += config_check.o
+
+obj-m += test/
diff --git a/tools/testing/cxl/config_check.c b/tools/testing/cxl/config_check.c
new file mode 100644
index 000000000000..de5e5b3652fd
--- /dev/null
+++ b/tools/testing/cxl/config_check.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bug.h>
+
+void check(void)
+{
+ /*
+ * These kconfig symbols must be set to "m" for cxl_test to load
+ * and operate.
+ */
+ BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_BUS));
+ BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_ACPI));
+ BUILD_BUG_ON(!IS_MODULE(CONFIG_CXL_PMEM));
+}
diff --git a/tools/testing/cxl/mock_acpi.c b/tools/testing/cxl/mock_acpi.c
new file mode 100644
index 000000000000..55813de26d46
--- /dev/null
+++ b/tools/testing/cxl/mock_acpi.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2021 Intel Corporation. All rights reserved. */
+
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/acpi.h>
+#include <cxl.h>
+#include "test/mock.h"
+
+struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
+{
+ int index;
+ struct acpi_device *adev, *found = NULL;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_bridge(dev)) {
+ found = ACPI_COMPANION(dev);
+ goto out;
+ }
+
+ if (dev->bus == &platform_bus_type)
+ goto out;
+
+ adev = to_acpi_device(dev);
+ if (!acpi_pci_find_root(adev->handle))
+ goto out;
+
+ if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
+ found = adev;
+ dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
+ }
+out:
+ put_cxl_mock_ops(index);
+ return found;
+}
diff --git a/tools/testing/cxl/test/Kbuild b/tools/testing/cxl/test/Kbuild
new file mode 100644
index 000000000000..4e59e2c911f6
--- /dev/null
+++ b/tools/testing/cxl/test/Kbuild
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+ccflags-y := -I$(srctree)/drivers/cxl/
+
+obj-m += cxl_test.o
+obj-m += cxl_mock.o
+obj-m += cxl_mock_mem.o
+
+cxl_test-y := cxl.o
+cxl_mock-y := mock.o
+cxl_mock_mem-y := mem.o
diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
new file mode 100644
index 000000000000..7edce12fd2ce
--- /dev/null
+++ b/tools/testing/cxl/test/cxl.c
@@ -0,0 +1,1080 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+
+#include <linux/platform_device.h>
+#include <linux/genalloc.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/mm.h>
+#include <cxlmem.h>
+#include "mock.h"
+
+#define NR_CXL_HOST_BRIDGES 2
+#define NR_CXL_SINGLE_HOST 1
+#define NR_CXL_ROOT_PORTS 2
+#define NR_CXL_SWITCH_PORTS 2
+#define NR_CXL_PORT_DECODERS 8
+
+static struct platform_device *cxl_acpi;
+static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
+#define NR_MULTI_ROOT (NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS)
+static struct platform_device *cxl_root_port[NR_MULTI_ROOT];
+static struct platform_device *cxl_switch_uport[NR_MULTI_ROOT];
+#define NR_MEM_MULTI \
+ (NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS * NR_CXL_SWITCH_PORTS)
+static struct platform_device *cxl_switch_dport[NR_MEM_MULTI];
+
+static struct platform_device *cxl_hb_single[NR_CXL_SINGLE_HOST];
+static struct platform_device *cxl_root_single[NR_CXL_SINGLE_HOST];
+static struct platform_device *cxl_swu_single[NR_CXL_SINGLE_HOST];
+#define NR_MEM_SINGLE (NR_CXL_SINGLE_HOST * NR_CXL_SWITCH_PORTS)
+static struct platform_device *cxl_swd_single[NR_MEM_SINGLE];
+
+struct platform_device *cxl_mem[NR_MEM_MULTI];
+struct platform_device *cxl_mem_single[NR_MEM_SINGLE];
+
+
+static inline bool is_multi_bridge(struct device *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++)
+ if (&cxl_host_bridge[i]->dev == dev)
+ return true;
+ return false;
+}
+
+static inline bool is_single_bridge(struct device *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++)
+ if (&cxl_hb_single[i]->dev == dev)
+ return true;
+ return false;
+}
+
+static struct acpi_device acpi0017_mock;
+static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST] = {
+ [0] = {
+ .handle = &host_bridge[0],
+ },
+ [1] = {
+ .handle = &host_bridge[1],
+ },
+ [2] = {
+ .handle = &host_bridge[2],
+ },
+
+};
+
+static bool is_mock_dev(struct device *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_mem); i++)
+ if (dev == &cxl_mem[i]->dev)
+ return true;
+ for (i = 0; i < ARRAY_SIZE(cxl_mem_single); i++)
+ if (dev == &cxl_mem_single[i]->dev)
+ return true;
+ if (dev == &cxl_acpi->dev)
+ return true;
+ return false;
+}
+
+static bool is_mock_adev(struct acpi_device *adev)
+{
+ int i;
+
+ if (adev == &acpi0017_mock)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(host_bridge); i++)
+ if (adev == &host_bridge[i])
+ return true;
+
+ return false;
+}
+
+static struct {
+ struct acpi_table_cedt cedt;
+ struct acpi_cedt_chbs chbs[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST];
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[1];
+ } cfmws0;
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[2];
+ } cfmws1;
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[1];
+ } cfmws2;
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[2];
+ } cfmws3;
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[1];
+ } cfmws4;
+} __packed mock_cedt = {
+ .cedt = {
+ .header = {
+ .signature = "CEDT",
+ .length = sizeof(mock_cedt),
+ .revision = 1,
+ },
+ },
+ .chbs[0] = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CHBS,
+ .length = sizeof(mock_cedt.chbs[0]),
+ },
+ .uid = 0,
+ .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
+ },
+ .chbs[1] = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CHBS,
+ .length = sizeof(mock_cedt.chbs[0]),
+ },
+ .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,
+ },
+ .cfmws0 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws0),
+ },
+ .interleave_ways = 0,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
+ .qtg_id = 0,
+ .window_size = SZ_256M * 4UL,
+ },
+ .target = { 0 },
+ },
+ .cfmws1 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws1),
+ },
+ .interleave_ways = 1,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
+ .qtg_id = 1,
+ .window_size = SZ_256M * 8UL,
+ },
+ .target = { 0, 1, },
+ },
+ .cfmws2 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws2),
+ },
+ .interleave_ways = 0,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_PMEM,
+ .qtg_id = 2,
+ .window_size = SZ_256M * 4UL,
+ },
+ .target = { 0 },
+ },
+ .cfmws3 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws3),
+ },
+ .interleave_ways = 1,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_PMEM,
+ .qtg_id = 3,
+ .window_size = SZ_256M * 8UL,
+ },
+ .target = { 0, 1, },
+ },
+ .cfmws4 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws4),
+ },
+ .interleave_ways = 0,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_PMEM,
+ .qtg_id = 4,
+ .window_size = SZ_256M * 4UL,
+ },
+ .target = { 2 },
+ },
+};
+
+struct acpi_cedt_cfmws *mock_cfmws[] = {
+ [0] = &mock_cedt.cfmws0.cfmws,
+ [1] = &mock_cedt.cfmws1.cfmws,
+ [2] = &mock_cedt.cfmws2.cfmws,
+ [3] = &mock_cedt.cfmws3.cfmws,
+ [4] = &mock_cedt.cfmws4.cfmws,
+};
+
+struct cxl_mock_res {
+ struct list_head list;
+ struct range range;
+};
+
+static LIST_HEAD(mock_res);
+static DEFINE_MUTEX(mock_res_lock);
+static struct gen_pool *cxl_mock_pool;
+
+static void depopulate_all_mock_resources(void)
+{
+ struct cxl_mock_res *res, *_res;
+
+ mutex_lock(&mock_res_lock);
+ list_for_each_entry_safe(res, _res, &mock_res, list) {
+ gen_pool_free(cxl_mock_pool, res->range.start,
+ range_len(&res->range));
+ list_del(&res->list);
+ kfree(res);
+ }
+ mutex_unlock(&mock_res_lock);
+}
+
+static struct cxl_mock_res *alloc_mock_res(resource_size_t size)
+{
+ struct cxl_mock_res *res = kzalloc(sizeof(*res), GFP_KERNEL);
+ struct genpool_data_align data = {
+ .align = SZ_256M,
+ };
+ unsigned long phys;
+
+ INIT_LIST_HEAD(&res->list);
+ phys = gen_pool_alloc_algo(cxl_mock_pool, size,
+ gen_pool_first_fit_align, &data);
+ if (!phys)
+ return NULL;
+
+ res->range = (struct range) {
+ .start = phys,
+ .end = phys + size - 1,
+ };
+ mutex_lock(&mock_res_lock);
+ list_add(&res->list, &mock_res);
+ mutex_unlock(&mock_res_lock);
+
+ return res;
+}
+
+static int populate_cedt(void)
+{
+ struct cxl_mock_res *res;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mock_cedt.chbs); i++) {
+ struct acpi_cedt_chbs *chbs = &mock_cedt.chbs[i];
+ resource_size_t size;
+
+ if (chbs->cxl_version == ACPI_CEDT_CHBS_VERSION_CXL20)
+ size = ACPI_CEDT_CHBS_LENGTH_CXL20;
+ else
+ size = ACPI_CEDT_CHBS_LENGTH_CXL11;
+
+ res = alloc_mock_res(size);
+ if (!res)
+ return -ENOMEM;
+ chbs->base = res->range.start;
+ chbs->length = size;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(mock_cfmws); i++) {
+ struct acpi_cedt_cfmws *window = mock_cfmws[i];
+
+ res = alloc_mock_res(window->window_size);
+ if (!res)
+ return -ENOMEM;
+ window->base_hpa = res->range.start;
+ }
+
+ return 0;
+}
+
+/*
+ * WARNING, this hack assumes the format of 'struct
+ * cxl_cfmws_context' and 'struct cxl_chbs_context' share the property that
+ * the first struct member is the device being probed by the cxl_acpi
+ * driver.
+ */
+struct cxl_cedt_context {
+ struct device *dev;
+};
+
+static int mock_acpi_table_parse_cedt(enum acpi_cedt_type id,
+ acpi_tbl_entry_handler_arg handler_arg,
+ void *arg)
+{
+ struct cxl_cedt_context *ctx = arg;
+ struct device *dev = ctx->dev;
+ union acpi_subtable_headers *h;
+ unsigned long end;
+ int i;
+
+ if (dev != &cxl_acpi->dev)
+ return acpi_table_parse_cedt(id, handler_arg, arg);
+
+ if (id == ACPI_CEDT_TYPE_CHBS)
+ for (i = 0; i < ARRAY_SIZE(mock_cedt.chbs); i++) {
+ h = (union acpi_subtable_headers *)&mock_cedt.chbs[i];
+ end = (unsigned long)&mock_cedt.chbs[i + 1];
+ handler_arg(h, arg, end);
+ }
+
+ if (id == ACPI_CEDT_TYPE_CFMWS)
+ for (i = 0; i < ARRAY_SIZE(mock_cfmws); i++) {
+ h = (union acpi_subtable_headers *) mock_cfmws[i];
+ end = (unsigned long) h + mock_cfmws[i]->header.length;
+ handler_arg(h, arg, end);
+ }
+
+ return 0;
+}
+
+static bool is_mock_bridge(struct device *dev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++)
+ if (dev == &cxl_host_bridge[i]->dev)
+ return true;
+ for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++)
+ if (dev == &cxl_hb_single[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;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_root_single); i++)
+ if (dev == &cxl_root_single[i]->dev)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_swu_single); i++)
+ if (dev == &cxl_swu_single[i]->dev)
+ return true;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_swd_single); i++)
+ if (dev == &cxl_swd_single[i]->dev)
+ return true;
+
+ if (is_cxl_memdev(dev))
+ return is_mock_dev(dev->parent);
+
+ return false;
+}
+
+static int host_bridge_index(struct acpi_device *adev)
+{
+ return adev - host_bridge;
+}
+
+static struct acpi_device *find_host_bridge(acpi_handle handle)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(host_bridge); i++)
+ if (handle == host_bridge[i].handle)
+ return &host_bridge[i];
+ return NULL;
+}
+
+static acpi_status
+mock_acpi_evaluate_integer(acpi_handle handle, acpi_string pathname,
+ struct acpi_object_list *arguments,
+ unsigned long long *data)
+{
+ struct acpi_device *adev = find_host_bridge(handle);
+
+ if (!adev || strcmp(pathname, METHOD_NAME__UID) != 0)
+ return acpi_evaluate_integer(handle, pathname, arguments, data);
+
+ *data = host_bridge_index(adev);
+ return AE_OK;
+}
+
+static struct pci_bus mock_pci_bus[NR_CXL_HOST_BRIDGES];
+static struct acpi_pci_root mock_pci_root[NR_CXL_HOST_BRIDGES] = {
+ [0] = {
+ .bus = &mock_pci_bus[0],
+ },
+ [1] = {
+ .bus = &mock_pci_bus[1],
+ },
+};
+
+static bool is_mock_bus(struct pci_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mock_pci_bus); i++)
+ if (bus == &mock_pci_bus[i])
+ return true;
+ return false;
+}
+
+static struct acpi_pci_root *mock_acpi_pci_find_root(acpi_handle handle)
+{
+ struct acpi_device *adev = find_host_bridge(handle);
+
+ if (!adev)
+ return acpi_pci_find_root(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_decoder_commit(struct cxl_decoder *cxld)
+{
+ struct cxl_port *port = to_cxl_port(cxld->dev.parent);
+ int id = cxld->id;
+
+ if (cxld->flags & CXL_DECODER_F_ENABLE)
+ return 0;
+
+ dev_dbg(&port->dev, "%s commit\n", dev_name(&cxld->dev));
+ if (port->commit_end + 1 != id) {
+ dev_dbg(&port->dev,
+ "%s: out of order commit, expected decoder%d.%d\n",
+ dev_name(&cxld->dev), port->id, port->commit_end + 1);
+ return -EBUSY;
+ }
+
+ port->commit_end++;
+ cxld->flags |= CXL_DECODER_F_ENABLE;
+
+ return 0;
+}
+
+static int mock_decoder_reset(struct cxl_decoder *cxld)
+{
+ struct cxl_port *port = to_cxl_port(cxld->dev.parent);
+ int id = cxld->id;
+
+ if ((cxld->flags & CXL_DECODER_F_ENABLE) == 0)
+ return 0;
+
+ dev_dbg(&port->dev, "%s reset\n", dev_name(&cxld->dev));
+ if (port->commit_end != id) {
+ dev_dbg(&port->dev,
+ "%s: out of order reset, expected decoder%d.%d\n",
+ dev_name(&cxld->dev), port->id, port->commit_end);
+ return -EBUSY;
+ }
+
+ port->commit_end--;
+ cxld->flags &= ~CXL_DECODER_F_ENABLE;
+
+ 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) {
+ struct cxl_switch_decoder *cxlsd;
+
+ cxlsd = cxl_switch_decoder_alloc(port, target_count);
+ if (IS_ERR(cxlsd)) {
+ dev_warn(&port->dev,
+ "Failed to allocate the decoder\n");
+ return PTR_ERR(cxlsd);
+ }
+ cxld = &cxlsd->cxld;
+ } else {
+ struct cxl_endpoint_decoder *cxled;
+
+ cxled = cxl_endpoint_decoder_alloc(port);
+
+ if (IS_ERR(cxled)) {
+ dev_warn(&port->dev,
+ "Failed to allocate the decoder\n");
+ return PTR_ERR(cxled);
+ }
+ cxld = &cxled->cxld;
+ }
+
+ cxld->hpa_range = (struct range) {
+ .start = 0,
+ .end = -1,
+ };
+
+ cxld->interleave_ways = min_not_zero(target_count, 1);
+ cxld->interleave_granularity = SZ_4K;
+ cxld->target_type = CXL_DECODER_EXPANDER;
+ cxld->commit = mock_decoder_commit;
+ cxld->reset = mock_decoder_reset;
+
+ 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) {
+ if (is_multi_bridge(port->uport)) {
+ array_size = ARRAY_SIZE(cxl_root_port);
+ array = cxl_root_port;
+ } else if (is_single_bridge(port->uport)) {
+ array_size = ARRAY_SIZE(cxl_root_single);
+ array = cxl_root_single;
+ } else {
+ dev_dbg(&port->dev, "%s: unknown bridge type\n",
+ dev_name(port->uport));
+ return -ENXIO;
+ }
+ } else if (port->depth == 2) {
+ struct cxl_port *parent = to_cxl_port(port->dev.parent);
+
+ if (is_multi_bridge(parent->uport)) {
+ array_size = ARRAY_SIZE(cxl_switch_dport);
+ array = cxl_switch_dport;
+ } else if (is_single_bridge(parent->uport)) {
+ array_size = ARRAY_SIZE(cxl_swd_single);
+ array = cxl_swd_single;
+ } else {
+ dev_dbg(&port->dev, "%s: unknown bridge type\n",
+ dev_name(port->uport));
+ return -ENXIO;
+ }
+ } 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) {
+ dev_dbg(&port->dev, "%s: mismatch parent %s\n",
+ dev_name(port->uport),
+ dev_name(pdev->dev.parent));
+ 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,
+ .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),
+};
+
+static void mock_companion(struct acpi_device *adev, struct device *dev)
+{
+ device_initialize(&adev->dev);
+ fwnode_init(&adev->fwnode, NULL);
+ dev->fwnode = &adev->fwnode;
+ adev->fwnode.dev = dev;
+}
+
+#ifndef SZ_64G
+#define SZ_64G (SZ_32G * 2)
+#endif
+
+#ifndef SZ_512G
+#define SZ_512G (SZ_64G * 8)
+#endif
+
+static __init int cxl_single_init(void)
+{
+ int i, rc;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++) {
+ struct acpi_device *adev =
+ &host_bridge[NR_CXL_HOST_BRIDGES + i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_host_bridge",
+ NR_CXL_HOST_BRIDGES + i);
+ if (!pdev)
+ goto err_bridge;
+
+ mock_companion(adev, &pdev->dev);
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_bridge;
+ }
+
+ cxl_hb_single[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_single); i++) {
+ struct platform_device *bridge =
+ cxl_hb_single[i % ARRAY_SIZE(cxl_hb_single)];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_root_port",
+ NR_MULTI_ROOT + i);
+ if (!pdev)
+ goto err_port;
+ pdev->dev.parent = &bridge->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_port;
+ }
+ cxl_root_single[i] = pdev;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_swu_single); i++) {
+ struct platform_device *root_port = cxl_root_single[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_switch_uport",
+ NR_MULTI_ROOT + i);
+ if (!pdev)
+ goto err_uport;
+ pdev->dev.parent = &root_port->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_uport;
+ }
+ cxl_swu_single[i] = pdev;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_swd_single); i++) {
+ struct platform_device *uport =
+ cxl_swu_single[i % ARRAY_SIZE(cxl_swu_single)];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_switch_dport",
+ i + NR_MEM_MULTI);
+ if (!pdev)
+ goto err_dport;
+ pdev->dev.parent = &uport->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_dport;
+ }
+ cxl_swd_single[i] = pdev;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_mem_single); i++) {
+ struct platform_device *dport = cxl_swd_single[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_mem", NR_MEM_MULTI + i);
+ if (!pdev)
+ goto err_mem;
+ pdev->dev.parent = &dport->dev;
+ set_dev_node(&pdev->dev, i % 2);
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_mem;
+ }
+ cxl_mem_single[i] = pdev;
+ }
+
+ return 0;
+
+err_mem:
+ for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_mem_single[i]);
+err_dport:
+ for (i = ARRAY_SIZE(cxl_swd_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_swd_single[i]);
+err_uport:
+ for (i = ARRAY_SIZE(cxl_swu_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_swu_single[i]);
+err_port:
+ for (i = ARRAY_SIZE(cxl_root_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_root_single[i]);
+err_bridge:
+ for (i = ARRAY_SIZE(cxl_hb_single) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_hb_single[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "physical_node");
+ platform_device_unregister(cxl_hb_single[i]);
+ }
+
+ return rc;
+}
+
+static void cxl_single_exit(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_mem_single[i]);
+ for (i = ARRAY_SIZE(cxl_swd_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_swd_single[i]);
+ for (i = ARRAY_SIZE(cxl_swu_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_swu_single[i]);
+ for (i = ARRAY_SIZE(cxl_root_single) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_root_single[i]);
+ for (i = ARRAY_SIZE(cxl_hb_single) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_hb_single[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "physical_node");
+ platform_device_unregister(cxl_hb_single[i]);
+ }
+}
+
+static __init int cxl_test_init(void)
+{
+ int rc, i;
+
+ register_cxl_mock_ops(&cxl_mock_ops);
+
+ cxl_mock_pool = gen_pool_create(ilog2(SZ_2M), NUMA_NO_NODE);
+ if (!cxl_mock_pool) {
+ rc = -ENOMEM;
+ goto err_gen_pool_create;
+ }
+
+ rc = gen_pool_add(cxl_mock_pool, iomem_resource.end + 1 - SZ_64G,
+ SZ_64G, NUMA_NO_NODE);
+ if (rc)
+ goto err_gen_pool_add;
+
+ rc = populate_cedt();
+ if (rc)
+ goto err_populate;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++) {
+ struct acpi_device *adev = &host_bridge[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_host_bridge", i);
+ if (!pdev)
+ goto err_bridge;
+
+ mock_companion(adev, &pdev->dev);
+ rc = platform_device_add(pdev);
+ if (rc) {
+ 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 % ARRAY_SIZE(cxl_host_bridge)];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_root_port", i);
+ if (!pdev)
+ goto err_port;
+ pdev->dev.parent = &bridge->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_port;
+ }
+ cxl_root_port[i] = pdev;
+ }
+
+ 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_uport;
+ 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_dport;
+ pdev->dev.parent = &uport->dev;
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_dport;
+ }
+ cxl_switch_dport[i] = pdev;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_mem); i++) {
+ struct platform_device *dport = cxl_switch_dport[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_mem", i);
+ if (!pdev)
+ goto err_mem;
+ pdev->dev.parent = &dport->dev;
+ set_dev_node(&pdev->dev, i % 2);
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_mem;
+ }
+ cxl_mem[i] = pdev;
+ }
+
+ rc = cxl_single_init();
+ if (rc)
+ goto err_mem;
+
+ cxl_acpi = platform_device_alloc("cxl_acpi", 0);
+ if (!cxl_acpi)
+ goto err_single;
+
+ mock_companion(&acpi0017_mock, &cxl_acpi->dev);
+ acpi0017_mock.dev.bus = &platform_bus_type;
+
+ rc = platform_device_add(cxl_acpi);
+ if (rc)
+ goto err_add;
+
+ return 0;
+
+err_add:
+ platform_device_put(cxl_acpi);
+err_single:
+ cxl_single_exit();
+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--) {
+ 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:
+ gen_pool_destroy(cxl_mock_pool);
+err_gen_pool_create:
+ unregister_cxl_mock_ops(&cxl_mock_ops);
+ return rc;
+}
+
+static __exit void cxl_test_exit(void)
+{
+ int i;
+
+ platform_device_unregister(cxl_acpi);
+ cxl_single_exit();
+ 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--) {
+ 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);
+}
+
+module_init(cxl_test_init);
+module_exit(cxl_test_exit);
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(ACPI);
+MODULE_IMPORT_NS(CXL);
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
new file mode 100644
index 000000000000..aa2df3a15051
--- /dev/null
+++ b/tools/testing/cxl/test/mem.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+
+#include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/sizes.h>
+#include <linux/bits.h>
+#include <cxlmem.h>
+
+#define LSA_SIZE SZ_128K
+#define DEV_SIZE SZ_2G
+#define EFFECT(x) (1U << x)
+
+static struct cxl_cel_entry mock_cel[] = {
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS),
+ .effect = cpu_to_le16(0),
+ },
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_IDENTIFY),
+ .effect = cpu_to_le16(0),
+ },
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_GET_LSA),
+ .effect = cpu_to_le16(0),
+ },
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_GET_PARTITION_INFO),
+ .effect = cpu_to_le16(0),
+ },
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_SET_LSA),
+ .effect = cpu_to_le16(EFFECT(1) | EFFECT(2)),
+ },
+ {
+ .opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO),
+ .effect = cpu_to_le16(0),
+ },
+};
+
+/* See CXL 2.0 Table 181 Get Health Info Output Payload */
+struct cxl_mbox_health_info {
+ u8 health_status;
+ u8 media_status;
+ u8 ext_status;
+ u8 life_used;
+ __le16 temperature;
+ __le32 dirty_shutdowns;
+ __le32 volatile_errors;
+ __le32 pmem_errors;
+} __packed;
+
+static struct {
+ struct cxl_mbox_get_supported_logs gsl;
+ struct cxl_gsl_entry entry;
+} mock_gsl_payload = {
+ .gsl = {
+ .entries = cpu_to_le16(1),
+ },
+ .entry = {
+ .uuid = DEFINE_CXL_CEL_UUID,
+ .size = cpu_to_le32(sizeof(mock_cel)),
+ },
+};
+
+static int mock_gsl(struct cxl_mbox_cmd *cmd)
+{
+ if (cmd->size_out < sizeof(mock_gsl_payload))
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, &mock_gsl_payload, sizeof(mock_gsl_payload));
+ cmd->size_out = sizeof(mock_gsl_payload);
+
+ return 0;
+}
+
+static int mock_get_log(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_get_log *gl = cmd->payload_in;
+ u32 offset = le32_to_cpu(gl->offset);
+ u32 length = le32_to_cpu(gl->length);
+ uuid_t uuid = DEFINE_CXL_CEL_UUID;
+ void *data = &mock_cel;
+
+ if (cmd->size_in < sizeof(*gl))
+ return -EINVAL;
+ if (length > cxlds->payload_size)
+ return -EINVAL;
+ if (offset + length > sizeof(mock_cel))
+ return -EINVAL;
+ if (!uuid_equal(&gl->uuid, &uuid))
+ return -EINVAL;
+ if (length > cmd->size_out)
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, data + offset, length);
+
+ return 0;
+}
+
+static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_identify id = {
+ .fw_revision = { "mock fw v1 " },
+ .lsa_size = cpu_to_le32(LSA_SIZE),
+ .partition_align =
+ cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER),
+ .total_capacity =
+ cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
+ };
+
+ if (cmd->size_out < sizeof(id))
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, &id, sizeof(id));
+
+ return 0;
+}
+
+static int mock_partition_info(struct cxl_dev_state *cxlds,
+ struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_get_partition_info pi = {
+ .active_volatile_cap =
+ cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
+ .active_persistent_cap =
+ cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
+ };
+
+ if (cmd->size_out < sizeof(pi))
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, &pi, sizeof(pi));
+
+ return 0;
+}
+
+static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in;
+ void *lsa = dev_get_drvdata(cxlds->dev);
+ u32 offset, length;
+
+ if (sizeof(*get_lsa) > cmd->size_in)
+ return -EINVAL;
+ offset = le32_to_cpu(get_lsa->offset);
+ length = le32_to_cpu(get_lsa->length);
+ if (offset + length > LSA_SIZE)
+ return -EINVAL;
+ if (length > cmd->size_out)
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, lsa + offset, length);
+ return 0;
+}
+
+static int mock_set_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_set_lsa *set_lsa = cmd->payload_in;
+ void *lsa = dev_get_drvdata(cxlds->dev);
+ u32 offset, length;
+
+ if (sizeof(*set_lsa) > cmd->size_in)
+ return -EINVAL;
+ offset = le32_to_cpu(set_lsa->offset);
+ length = cmd->size_in - sizeof(*set_lsa);
+ if (offset + length > LSA_SIZE)
+ return -EINVAL;
+
+ memcpy(lsa + offset, &set_lsa->data[0], length);
+ return 0;
+}
+
+static int mock_health_info(struct cxl_dev_state *cxlds,
+ struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_health_info health_info = {
+ /* set flags for maint needed, perf degraded, hw replacement */
+ .health_status = 0x7,
+ /* set media status to "All Data Lost" */
+ .media_status = 0x3,
+ /*
+ * set ext_status flags for:
+ * ext_life_used: normal,
+ * ext_temperature: critical,
+ * ext_corrected_volatile: warning,
+ * ext_corrected_persistent: normal,
+ */
+ .ext_status = 0x18,
+ .life_used = 15,
+ .temperature = cpu_to_le16(25),
+ .dirty_shutdowns = cpu_to_le32(10),
+ .volatile_errors = cpu_to_le32(20),
+ .pmem_errors = cpu_to_le32(30),
+ };
+
+ if (cmd->size_out < sizeof(health_info))
+ return -EINVAL;
+
+ memcpy(cmd->payload_out, &health_info, sizeof(health_info));
+ return 0;
+}
+
+static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct device *dev = cxlds->dev;
+ int rc = -EIO;
+
+ switch (cmd->opcode) {
+ case CXL_MBOX_OP_GET_SUPPORTED_LOGS:
+ rc = mock_gsl(cmd);
+ break;
+ case CXL_MBOX_OP_GET_LOG:
+ rc = mock_get_log(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_IDENTIFY:
+ rc = mock_id(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_GET_LSA:
+ rc = mock_get_lsa(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_GET_PARTITION_INFO:
+ rc = mock_partition_info(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_SET_LSA:
+ rc = mock_set_lsa(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_GET_HEALTH_INFO:
+ rc = mock_health_info(cxlds, cmd);
+ break;
+ default:
+ break;
+ }
+
+ dev_dbg(dev, "opcode: %#x sz_in: %zd sz_out: %zd rc: %d\n", cmd->opcode,
+ cmd->size_in, cmd->size_out, rc);
+
+ return rc;
+}
+
+static void label_area_release(void *lsa)
+{
+ vfree(lsa);
+}
+
+static int cxl_mock_mem_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cxl_memdev *cxlmd;
+ struct cxl_dev_state *cxlds;
+ void *lsa;
+ int rc;
+
+ lsa = vmalloc(LSA_SIZE);
+ if (!lsa)
+ return -ENOMEM;
+ rc = devm_add_action_or_reset(dev, label_area_release, lsa);
+ if (rc)
+ return rc;
+ dev_set_drvdata(dev, lsa);
+
+ cxlds = cxl_dev_state_create(dev);
+ if (IS_ERR(cxlds))
+ return PTR_ERR(cxlds);
+
+ cxlds->serial = pdev->id;
+ cxlds->mbox_send = cxl_mock_mbox_send;
+ cxlds->payload_size = SZ_4K;
+
+ rc = cxl_enumerate_cmds(cxlds);
+ if (rc)
+ return rc;
+
+ rc = cxl_dev_state_identify(cxlds);
+ if (rc)
+ return rc;
+
+ rc = cxl_mem_create_range_info(cxlds);
+ if (rc)
+ return rc;
+
+ cxlmd = devm_cxl_add_memdev(cxlds);
+ if (IS_ERR(cxlmd))
+ return PTR_ERR(cxlmd);
+
+ if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM))
+ rc = devm_cxl_add_nvdimm(dev, cxlmd);
+
+ return 0;
+}
+
+static const struct platform_device_id cxl_mock_mem_ids[] = {
+ { .name = "cxl_mem", },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, cxl_mock_mem_ids);
+
+static struct platform_driver cxl_mock_mem_driver = {
+ .probe = cxl_mock_mem_probe,
+ .id_table = cxl_mock_mem_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+};
+
+module_platform_driver(cxl_mock_mem_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(CXL);
diff --git a/tools/testing/cxl/test/mock.c b/tools/testing/cxl/test/mock.c
new file mode 100644
index 000000000000..bce6a21df0d5
--- /dev/null
+++ b/tools/testing/cxl/test/mock.c
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//Copyright(c) 2021 Intel Corporation. All rights reserved.
+
+#include <linux/libnvdimm.h>
+#include <linux/rculist.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <cxlmem.h>
+#include <cxlpci.h>
+#include "mock.h"
+
+static LIST_HEAD(mock);
+
+void register_cxl_mock_ops(struct cxl_mock_ops *ops)
+{
+ list_add_rcu(&ops->list, &mock);
+}
+EXPORT_SYMBOL_GPL(register_cxl_mock_ops);
+
+static DEFINE_SRCU(cxl_mock_srcu);
+
+void unregister_cxl_mock_ops(struct cxl_mock_ops *ops)
+{
+ list_del_rcu(&ops->list);
+ synchronize_srcu(&cxl_mock_srcu);
+}
+EXPORT_SYMBOL_GPL(unregister_cxl_mock_ops);
+
+struct cxl_mock_ops *get_cxl_mock_ops(int *index)
+{
+ *index = srcu_read_lock(&cxl_mock_srcu);
+ return list_first_or_null_rcu(&mock, struct cxl_mock_ops, list);
+}
+EXPORT_SYMBOL_GPL(get_cxl_mock_ops);
+
+void put_cxl_mock_ops(int index)
+{
+ srcu_read_unlock(&cxl_mock_srcu, index);
+}
+EXPORT_SYMBOL_GPL(put_cxl_mock_ops);
+
+bool __wrap_is_acpi_device_node(const struct fwnode_handle *fwnode)
+{
+ struct acpi_device *adev =
+ container_of(fwnode, struct acpi_device, fwnode);
+ int index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+ bool retval = false;
+
+ if (ops)
+ retval = ops->is_mock_adev(adev);
+
+ if (!retval)
+ retval = is_acpi_device_node(fwnode);
+
+ put_cxl_mock_ops(index);
+ return retval;
+}
+EXPORT_SYMBOL(__wrap_is_acpi_device_node);
+
+int __wrap_acpi_table_parse_cedt(enum acpi_cedt_type id,
+ acpi_tbl_entry_handler_arg handler_arg,
+ void *arg)
+{
+ int index, rc;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops)
+ rc = ops->acpi_table_parse_cedt(id, handler_arg, arg);
+ else
+ rc = acpi_table_parse_cedt(id, handler_arg, arg);
+
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_acpi_table_parse_cedt, ACPI);
+
+acpi_status __wrap_acpi_evaluate_integer(acpi_handle handle,
+ acpi_string pathname,
+ struct acpi_object_list *arguments,
+ unsigned long long *data)
+{
+ int index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+ acpi_status status;
+
+ if (ops)
+ status = ops->acpi_evaluate_integer(handle, pathname, arguments,
+ data);
+ else
+ status = acpi_evaluate_integer(handle, pathname, arguments,
+ data);
+ put_cxl_mock_ops(index);
+
+ return status;
+}
+EXPORT_SYMBOL(__wrap_acpi_evaluate_integer);
+
+struct acpi_pci_root *__wrap_acpi_pci_find_root(acpi_handle handle)
+{
+ int index;
+ struct acpi_pci_root *root;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops)
+ root = ops->acpi_pci_find_root(handle);
+ else
+ root = acpi_pci_find_root(handle);
+
+ put_cxl_mock_ops(index);
+
+ return root;
+}
+EXPORT_SYMBOL_GPL(__wrap_acpi_pci_find_root);
+
+struct nvdimm_bus *
+__wrap_nvdimm_bus_register(struct device *dev,
+ struct nvdimm_bus_descriptor *nd_desc)
+{
+ int index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_dev(dev->parent->parent))
+ nd_desc->provider_name = "cxl_test";
+ put_cxl_mock_ops(index);
+
+ return nvdimm_bus_register(dev, nd_desc);
+}
+EXPORT_SYMBOL_GPL(__wrap_nvdimm_bus_register);
+
+struct cxl_hdm *__wrap_devm_cxl_setup_hdm(struct cxl_port *port)
+{
+ int index;
+ struct cxl_hdm *cxlhdm;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_port(port->uport))
+ cxlhdm = ops->devm_cxl_setup_hdm(port);
+ else
+ cxlhdm = devm_cxl_setup_hdm(port);
+ put_cxl_mock_ops(index);
+
+ return cxlhdm;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_devm_cxl_setup_hdm, CXL);
+
+int __wrap_devm_cxl_add_passthrough_decoder(struct cxl_port *port)
+{
+ int rc, index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_port(port->uport))
+ rc = ops->devm_cxl_add_passthrough_decoder(port);
+ else
+ rc = devm_cxl_add_passthrough_decoder(port);
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_devm_cxl_add_passthrough_decoder, CXL);
+
+int __wrap_devm_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm)
+{
+ int rc, index;
+ struct cxl_port *port = cxlhdm->port;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_port(port->uport))
+ rc = ops->devm_cxl_enumerate_decoders(cxlhdm);
+ else
+ rc = devm_cxl_enumerate_decoders(cxlhdm);
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_devm_cxl_enumerate_decoders, CXL);
+
+int __wrap_devm_cxl_port_enumerate_dports(struct cxl_port *port)
+{
+ int rc, index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_port(port->uport))
+ rc = ops->devm_cxl_port_enumerate_dports(port);
+ else
+ rc = devm_cxl_port_enumerate_dports(port);
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_devm_cxl_port_enumerate_dports, CXL);
+
+int __wrap_cxl_await_media_ready(struct cxl_dev_state *cxlds)
+{
+ int rc, index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_dev(cxlds->dev))
+ rc = 0;
+ else
+ rc = cxl_await_media_ready(cxlds);
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_cxl_await_media_ready, CXL);
+
+int __wrap_cxl_hdm_decode_init(struct cxl_dev_state *cxlds,
+ struct cxl_hdm *cxlhdm)
+{
+ int rc = 0, index;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_dev(cxlds->dev))
+ rc = 0;
+ else
+ rc = cxl_hdm_decode_init(cxlds, cxlhdm);
+ put_cxl_mock_ops(index);
+
+ return rc;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_cxl_hdm_decode_init, CXL);
+
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(ACPI);
+MODULE_IMPORT_NS(CXL);
diff --git a/tools/testing/cxl/test/mock.h b/tools/testing/cxl/test/mock.h
new file mode 100644
index 000000000000..738f24e3988a
--- /dev/null
+++ b/tools/testing/cxl/test/mock.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/list.h>
+#include <linux/acpi.h>
+#include <cxl.h>
+
+struct cxl_mock_ops {
+ struct list_head list;
+ bool (*is_mock_adev)(struct acpi_device *dev);
+ int (*acpi_table_parse_cedt)(enum acpi_cedt_type id,
+ acpi_tbl_entry_handler_arg handler_arg,
+ void *arg);
+ bool (*is_mock_bridge)(struct device *dev);
+ acpi_status (*acpi_evaluate_integer)(acpi_handle handle,
+ acpi_string pathname,
+ struct acpi_object_list *arguments,
+ unsigned long long *data);
+ struct acpi_pci_root *(*acpi_pci_find_root)(acpi_handle handle);
+ bool (*is_mock_bus)(struct pci_bus *bus);
+ bool (*is_mock_port)(struct device *dev);
+ bool (*is_mock_dev)(struct device *dev);
+ int (*devm_cxl_port_enumerate_dports)(struct cxl_port *port);
+ struct cxl_hdm *(*devm_cxl_setup_hdm)(struct cxl_port *port);
+ int (*devm_cxl_add_passthrough_decoder)(struct cxl_port *port);
+ int (*devm_cxl_enumerate_decoders)(struct cxl_hdm *hdm);
+};
+
+void register_cxl_mock_ops(struct cxl_mock_ops *ops);
+void unregister_cxl_mock_ops(struct cxl_mock_ops *ops);
+struct cxl_mock_ops *get_cxl_mock_ops(int *index);
+void put_cxl_mock_ops(int index);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.