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-rw-r--r--drivers/acpi/pci_root.c1
-rw-r--r--drivers/cxl/acpi.c109
-rw-r--r--drivers/cxl/core/core.h8
-rw-r--r--drivers/cxl/core/pmem.c102
-rw-r--r--drivers/cxl/core/port.c118
-rw-r--r--drivers/cxl/core/region.c64
-rw-r--r--drivers/cxl/core/regs.c65
-rw-r--r--drivers/cxl/cxl.h46
-rw-r--r--drivers/cxl/cxlmem.h15
-rw-r--r--drivers/cxl/mem.c74
-rw-r--r--drivers/cxl/pci.c13
-rw-r--r--drivers/cxl/pmem.c351
-rw-r--r--tools/testing/cxl/Kbuild1
-rw-r--r--tools/testing/cxl/test/cxl.c170
-rw-r--r--tools/testing/cxl/test/mem.c40
-rw-r--r--tools/testing/cxl/test/mock.c19
-rw-r--r--tools/testing/cxl/test/mock.h3
17 files changed, 721 insertions, 478 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 4e3db20e9cbb..b3c202d2a433 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -493,6 +493,7 @@ static u32 calculate_cxl_support(void)
u32 support;
support = OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT;
+ support |= OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT;
if (pci_aer_available())
support |= OSC_CXL_PROTOCOL_ERR_REPORTING_SUPPORT;
if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index fb9f72813067..b9472fbfdefc 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -9,6 +9,8 @@
#include "cxlpci.h"
#include "cxl.h"
+#define CXL_RCRB_SIZE SZ_8K
+
static unsigned long cfmws_to_decoder_flags(int restrictions)
{
unsigned long flags = CXL_DECODER_F_ENABLE;
@@ -70,6 +72,10 @@ static int cxl_acpi_cfmws_verify(struct device *dev,
return 0;
}
+/*
+ * Note, @dev must be the first member, see 'struct cxl_chbs_context'
+ * and mock_acpi_table_parse_cedt()
+ */
struct cxl_cfmws_context {
struct device *dev;
struct cxl_port *root_port;
@@ -193,35 +199,39 @@ static int add_host_bridge_uport(struct device *match, void *arg)
{
struct cxl_port *root_port = arg;
struct device *host = root_port->dev.parent;
- struct acpi_device *bridge = to_cxl_host_bridge(host, match);
+ struct acpi_device *hb = to_cxl_host_bridge(host, match);
struct acpi_pci_root *pci_root;
struct cxl_dport *dport;
struct cxl_port *port;
+ struct device *bridge;
int rc;
- if (!bridge)
+ if (!hb)
return 0;
- dport = cxl_find_dport_by_dev(root_port, match);
+ pci_root = acpi_pci_find_root(hb->handle);
+ bridge = pci_root->bus->bridge;
+ dport = cxl_find_dport_by_dev(root_port, bridge);
if (!dport) {
dev_dbg(host, "host bridge expected and not found\n");
return 0;
}
- /*
- * Note that this lookup already succeeded in
- * to_cxl_host_bridge(), so no need to check for failure here
- */
- pci_root = acpi_pci_find_root(bridge->handle);
- rc = devm_cxl_register_pci_bus(host, match, pci_root->bus);
+ if (dport->rch) {
+ dev_info(bridge, "host supports CXL (restricted)\n");
+ return 0;
+ }
+
+ rc = devm_cxl_register_pci_bus(host, bridge, pci_root->bus);
if (rc)
return rc;
- port = devm_cxl_add_port(host, match, dport->component_reg_phys, dport);
+ port = devm_cxl_add_port(host, bridge, dport->component_reg_phys,
+ dport);
if (IS_ERR(port))
return PTR_ERR(port);
- dev_info(pci_root->bus->bridge, "host supports CXL\n");
+ dev_info(bridge, "host supports CXL\n");
return 0;
}
@@ -229,7 +239,9 @@ static int add_host_bridge_uport(struct device *match, void *arg)
struct cxl_chbs_context {
struct device *dev;
unsigned long long uid;
+ resource_size_t rcrb;
resource_size_t chbcr;
+ u32 cxl_version;
};
static int cxl_get_chbcr(union acpi_subtable_headers *header, void *arg,
@@ -245,27 +257,46 @@ static int cxl_get_chbcr(union acpi_subtable_headers *header, void *arg,
if (ctx->uid != chbs->uid)
return 0;
- ctx->chbcr = chbs->base;
+
+ ctx->cxl_version = chbs->cxl_version;
+ ctx->rcrb = CXL_RESOURCE_NONE;
+ ctx->chbcr = CXL_RESOURCE_NONE;
+
+ if (!chbs->base)
+ return 0;
+
+ if (chbs->cxl_version != ACPI_CEDT_CHBS_VERSION_CXL11) {
+ ctx->chbcr = chbs->base;
+ return 0;
+ }
+
+ if (chbs->length != CXL_RCRB_SIZE)
+ return 0;
+
+ ctx->rcrb = chbs->base;
+ ctx->chbcr = cxl_rcrb_to_component(ctx->dev, chbs->base,
+ CXL_RCRB_DOWNSTREAM);
return 0;
}
static int add_host_bridge_dport(struct device *match, void *arg)
{
- acpi_status status;
+ acpi_status rc;
+ struct device *bridge;
unsigned long long uid;
struct cxl_dport *dport;
struct cxl_chbs_context ctx;
+ struct acpi_pci_root *pci_root;
struct cxl_port *root_port = arg;
struct device *host = root_port->dev.parent;
- struct acpi_device *bridge = to_cxl_host_bridge(host, match);
+ struct acpi_device *hb = to_cxl_host_bridge(host, match);
- if (!bridge)
+ if (!hb)
return 0;
- status = acpi_evaluate_integer(bridge->handle, METHOD_NAME__UID, NULL,
- &uid);
- if (status != AE_OK) {
+ rc = acpi_evaluate_integer(hb->handle, METHOD_NAME__UID, NULL, &uid);
+ if (rc != AE_OK) {
dev_err(match, "unable to retrieve _UID\n");
return -ENODEV;
}
@@ -273,19 +304,35 @@ static int add_host_bridge_dport(struct device *match, void *arg)
dev_dbg(match, "UID found: %lld\n", uid);
ctx = (struct cxl_chbs_context) {
- .dev = host,
+ .dev = match,
.uid = uid,
};
acpi_table_parse_cedt(ACPI_CEDT_TYPE_CHBS, cxl_get_chbcr, &ctx);
- if (ctx.chbcr == 0) {
+ if (!ctx.chbcr) {
+ dev_warn(match, "No CHBS found for Host Bridge (UID %lld)\n",
+ uid);
+ return 0;
+ }
+
+ if (ctx.rcrb != CXL_RESOURCE_NONE)
+ dev_dbg(match, "RCRB found for UID %lld: %pa\n", uid, &ctx.rcrb);
+
+ if (ctx.chbcr == CXL_RESOURCE_NONE) {
dev_warn(match, "No CHBS found for Host Bridge (UID %lld)\n", uid);
return 0;
}
- dev_dbg(match, "CHBCR found: 0x%08llx\n", (u64)ctx.chbcr);
+ dev_dbg(match, "CHBCR found: %pa\n", &ctx.chbcr);
- dport = devm_cxl_add_dport(root_port, match, uid, ctx.chbcr);
+ pci_root = acpi_pci_find_root(hb->handle);
+ bridge = pci_root->bus->bridge;
+ if (ctx.cxl_version == ACPI_CEDT_CHBS_VERSION_CXL11)
+ dport = devm_cxl_add_rch_dport(root_port, bridge, uid,
+ ctx.chbcr, ctx.rcrb);
+ else
+ dport = devm_cxl_add_dport(root_port, bridge, uid,
+ ctx.chbcr);
if (IS_ERR(dport))
return PTR_ERR(dport);
@@ -511,7 +558,8 @@ static int cxl_acpi_probe(struct platform_device *pdev)
return rc;
/* In case PCI is scanned before ACPI re-trigger memdev attach */
- return cxl_bus_rescan();
+ cxl_bus_rescan();
+ return 0;
}
static const struct acpi_device_id cxl_acpi_ids[] = {
@@ -535,7 +583,20 @@ static struct platform_driver cxl_acpi_driver = {
.id_table = cxl_test_ids,
};
-module_platform_driver(cxl_acpi_driver);
+static int __init cxl_acpi_init(void)
+{
+ return platform_driver_register(&cxl_acpi_driver);
+}
+
+static void __exit cxl_acpi_exit(void)
+{
+ platform_driver_unregister(&cxl_acpi_driver);
+ cxl_bus_drain();
+}
+
+module_init(cxl_acpi_init);
+module_exit(cxl_acpi_exit);
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(CXL);
MODULE_IMPORT_NS(ACPI);
+MODULE_SOFTDEP("pre: cxl_pmem");
diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h
index 1d8f87be283f..8c04672dca56 100644
--- a/drivers/cxl/core/core.h
+++ b/drivers/cxl/core/core.h
@@ -58,14 +58,6 @@ extern struct rw_semaphore cxl_dpa_rwsem;
bool is_switch_decoder(struct device *dev);
struct cxl_switch_decoder *to_cxl_switch_decoder(struct device *dev);
-static inline struct cxl_ep *cxl_ep_load(struct cxl_port *port,
- struct cxl_memdev *cxlmd)
-{
- if (!port)
- return NULL;
-
- return xa_load(&port->endpoints, (unsigned long)&cxlmd->dev);
-}
int cxl_memdev_init(void);
void cxl_memdev_exit(void);
diff --git a/drivers/cxl/core/pmem.c b/drivers/cxl/core/pmem.c
index 7b9a9573e6f2..f3d2169b6731 100644
--- a/drivers/cxl/core/pmem.c
+++ b/drivers/cxl/core/pmem.c
@@ -99,7 +99,6 @@ static struct cxl_nvdimm_bridge *cxl_nvdimm_bridge_alloc(struct cxl_port *port)
dev = &cxl_nvb->dev;
cxl_nvb->port = port;
- cxl_nvb->state = CXL_NVB_NEW;
device_initialize(dev);
lockdep_set_class(&dev->mutex, &cxl_nvdimm_bridge_key);
device_set_pm_not_required(dev);
@@ -117,28 +116,7 @@ err:
static void unregister_nvb(void *_cxl_nvb)
{
struct cxl_nvdimm_bridge *cxl_nvb = _cxl_nvb;
- bool flush;
- /*
- * If the bridge was ever activated then there might be in-flight state
- * work to flush. Once the state has been changed to 'dead' then no new
- * work can be queued by user-triggered bind.
- */
- device_lock(&cxl_nvb->dev);
- flush = cxl_nvb->state != CXL_NVB_NEW;
- cxl_nvb->state = CXL_NVB_DEAD;
- device_unlock(&cxl_nvb->dev);
-
- /*
- * Even though the device core will trigger device_release_driver()
- * before the unregister, it does not know about the fact that
- * cxl_nvdimm_bridge_driver defers ->remove() work. So, do the driver
- * release not and flush it before tearing down the nvdimm device
- * hierarchy.
- */
- device_release_driver(&cxl_nvb->dev);
- if (flush)
- flush_work(&cxl_nvb->state_work);
device_unregister(&cxl_nvb->dev);
}
@@ -188,7 +166,6 @@ static void cxl_nvdimm_release(struct device *dev)
{
struct cxl_nvdimm *cxl_nvd = to_cxl_nvdimm(dev);
- xa_destroy(&cxl_nvd->pmem_regions);
kfree(cxl_nvd);
}
@@ -220,7 +197,8 @@ EXPORT_SYMBOL_NS_GPL(to_cxl_nvdimm, CXL);
static struct lock_class_key cxl_nvdimm_key;
-static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd)
+static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_nvdimm_bridge *cxl_nvb,
+ struct cxl_memdev *cxlmd)
{
struct cxl_nvdimm *cxl_nvd;
struct device *dev;
@@ -231,7 +209,7 @@ static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd)
dev = &cxl_nvd->dev;
cxl_nvd->cxlmd = cxlmd;
- xa_init(&cxl_nvd->pmem_regions);
+ cxlmd->cxl_nvd = cxl_nvd;
device_initialize(dev);
lockdep_set_class(&dev->mutex, &cxl_nvdimm_key);
device_set_pm_not_required(dev);
@@ -249,27 +227,60 @@ static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd)
return cxl_nvd;
}
-static void cxl_nvd_unregister(void *dev)
+static void cxl_nvd_unregister(void *_cxl_nvd)
{
- device_unregister(dev);
+ struct cxl_nvdimm *cxl_nvd = _cxl_nvd;
+ struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlmd->cxl_nvb;
+
+ /*
+ * Either the bridge is in ->remove() context under the device_lock(),
+ * or cxlmd_release_nvdimm() is cancelling the bridge's release action
+ * for @cxl_nvd and doing it itself (while manually holding the bridge
+ * lock).
+ */
+ device_lock_assert(&cxl_nvb->dev);
+ cxl_nvd->cxlmd = NULL;
+ cxlmd->cxl_nvd = NULL;
+ device_unregister(&cxl_nvd->dev);
+}
+
+static void cxlmd_release_nvdimm(void *_cxlmd)
+{
+ struct cxl_memdev *cxlmd = _cxlmd;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlmd->cxl_nvb;
+
+ device_lock(&cxl_nvb->dev);
+ if (cxlmd->cxl_nvd)
+ devm_release_action(&cxl_nvb->dev, cxl_nvd_unregister,
+ cxlmd->cxl_nvd);
+ device_unlock(&cxl_nvb->dev);
+ put_device(&cxl_nvb->dev);
}
/**
* devm_cxl_add_nvdimm() - add a bridge between a cxl_memdev and an nvdimm
- * @host: same host as @cxlmd
* @cxlmd: cxl_memdev instance that will perform LIBNVDIMM operations
*
* Return: 0 on success negative error code on failure.
*/
-int devm_cxl_add_nvdimm(struct device *host, struct cxl_memdev *cxlmd)
+int devm_cxl_add_nvdimm(struct cxl_memdev *cxlmd)
{
+ struct cxl_nvdimm_bridge *cxl_nvb;
struct cxl_nvdimm *cxl_nvd;
struct device *dev;
int rc;
- cxl_nvd = cxl_nvdimm_alloc(cxlmd);
- if (IS_ERR(cxl_nvd))
- return PTR_ERR(cxl_nvd);
+ cxl_nvb = cxl_find_nvdimm_bridge(&cxlmd->dev);
+ if (!cxl_nvb)
+ return -ENODEV;
+
+ cxl_nvd = cxl_nvdimm_alloc(cxl_nvb, cxlmd);
+ if (IS_ERR(cxl_nvd)) {
+ rc = PTR_ERR(cxl_nvd);
+ goto err_alloc;
+ }
+ cxlmd->cxl_nvb = cxl_nvb;
dev = &cxl_nvd->dev;
rc = dev_set_name(dev, "pmem%d", cxlmd->id);
@@ -280,13 +291,34 @@ int devm_cxl_add_nvdimm(struct device *host, struct cxl_memdev *cxlmd)
if (rc)
goto err;
- dev_dbg(host, "%s: register %s\n", dev_name(dev->parent),
- dev_name(dev));
+ dev_dbg(&cxlmd->dev, "register %s\n", dev_name(dev));
- return devm_add_action_or_reset(host, cxl_nvd_unregister, dev);
+ /*
+ * The two actions below arrange for @cxl_nvd to be deleted when either
+ * the top-level PMEM bridge goes down, or the endpoint device goes
+ * through ->remove().
+ */
+ device_lock(&cxl_nvb->dev);
+ if (cxl_nvb->dev.driver)
+ rc = devm_add_action_or_reset(&cxl_nvb->dev, cxl_nvd_unregister,
+ cxl_nvd);
+ else
+ rc = -ENXIO;
+ device_unlock(&cxl_nvb->dev);
+
+ if (rc)
+ goto err_alloc;
+
+ /* @cxlmd carries a reference on @cxl_nvb until cxlmd_release_nvdimm */
+ return devm_add_action_or_reset(&cxlmd->dev, cxlmd_release_nvdimm, cxlmd);
err:
put_device(dev);
+err_alloc:
+ cxlmd->cxl_nvb = NULL;
+ cxlmd->cxl_nvd = NULL;
+ put_device(&cxl_nvb->dev);
+
return rc;
}
EXPORT_SYMBOL_NS_GPL(devm_cxl_add_nvdimm, CXL);
diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index 0d2f5eaaca7d..50bdbd9f8da3 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -628,6 +628,8 @@ static struct cxl_port *cxl_port_alloc(struct device *uport,
iter = to_cxl_port(iter->dev.parent);
if (iter->host_bridge)
port->host_bridge = iter->host_bridge;
+ else if (parent_dport->rch)
+ port->host_bridge = parent_dport->dport;
else
port->host_bridge = iter->uport;
dev_dbg(uport, "host-bridge: %s\n", dev_name(port->host_bridge));
@@ -899,10 +901,10 @@ static void cxl_dport_unlink(void *data)
sysfs_remove_link(&port->dev.kobj, link_name);
}
-static struct cxl_dport *__devm_cxl_add_dport(struct cxl_port *port,
- struct device *dport_dev,
- int port_id,
- resource_size_t component_reg_phys)
+static struct cxl_dport *
+__devm_cxl_add_dport(struct cxl_port *port, struct device *dport_dev,
+ int port_id, resource_size_t component_reg_phys,
+ resource_size_t rcrb)
{
char link_name[CXL_TARGET_STRLEN];
struct cxl_dport *dport;
@@ -932,6 +934,9 @@ static struct cxl_dport *__devm_cxl_add_dport(struct cxl_port *port,
dport->port_id = port_id;
dport->component_reg_phys = component_reg_phys;
dport->port = port;
+ if (rcrb != CXL_RESOURCE_NONE)
+ dport->rch = true;
+ dport->rcrb = rcrb;
cond_cxl_root_lock(port);
rc = add_dport(port, dport);
@@ -956,7 +961,7 @@ static struct cxl_dport *__devm_cxl_add_dport(struct cxl_port *port,
}
/**
- * devm_cxl_add_dport - append downstream port data to a cxl_port
+ * devm_cxl_add_dport - append VH downstream port data to a cxl_port
* @port: the cxl_port that references this dport
* @dport_dev: firmware or PCI device representing the dport
* @port_id: identifier for this dport in a decoder's target list
@@ -973,7 +978,7 @@ struct cxl_dport *devm_cxl_add_dport(struct cxl_port *port,
struct cxl_dport *dport;
dport = __devm_cxl_add_dport(port, dport_dev, port_id,
- component_reg_phys);
+ component_reg_phys, CXL_RESOURCE_NONE);
if (IS_ERR(dport)) {
dev_dbg(dport_dev, "failed to add dport to %s: %ld\n",
dev_name(&port->dev), PTR_ERR(dport));
@@ -986,6 +991,42 @@ struct cxl_dport *devm_cxl_add_dport(struct cxl_port *port,
}
EXPORT_SYMBOL_NS_GPL(devm_cxl_add_dport, CXL);
+/**
+ * devm_cxl_add_rch_dport - append RCH downstream port data to a cxl_port
+ * @port: the cxl_port that references this dport
+ * @dport_dev: firmware or PCI device representing the dport
+ * @port_id: identifier for this dport in a decoder's target list
+ * @component_reg_phys: optional location of CXL component registers
+ * @rcrb: mandatory location of a Root Complex Register Block
+ *
+ * See CXL 3.0 9.11.8 CXL Devices Attached to an RCH
+ */
+struct cxl_dport *devm_cxl_add_rch_dport(struct cxl_port *port,
+ struct device *dport_dev, int port_id,
+ resource_size_t component_reg_phys,
+ resource_size_t rcrb)
+{
+ struct cxl_dport *dport;
+
+ if (rcrb == CXL_RESOURCE_NONE) {
+ dev_dbg(&port->dev, "failed to add RCH dport, missing RCRB\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ dport = __devm_cxl_add_dport(port, dport_dev, port_id,
+ component_reg_phys, rcrb);
+ if (IS_ERR(dport)) {
+ dev_dbg(dport_dev, "failed to add RCH dport to %s: %ld\n",
+ dev_name(&port->dev), PTR_ERR(dport));
+ } else {
+ dev_dbg(dport_dev, "RCH dport added to %s\n",
+ dev_name(&port->dev));
+ }
+
+ return dport;
+}
+EXPORT_SYMBOL_NS_GPL(devm_cxl_add_rch_dport, CXL);
+
static int add_ep(struct cxl_ep *new)
{
struct cxl_port *port = new->dport->port;
@@ -1171,45 +1212,6 @@ static void reap_dports(struct cxl_port *port)
}
}
-int devm_cxl_add_endpoint(struct cxl_memdev *cxlmd,
- struct cxl_dport *parent_dport)
-{
- struct cxl_port *parent_port = parent_dport->port;
- struct cxl_dev_state *cxlds = cxlmd->cxlds;
- struct cxl_port *endpoint, *iter, *down;
- int rc;
-
- /*
- * Now that the path to the root is established record all the
- * intervening ports in the chain.
- */
- for (iter = parent_port, down = NULL; !is_cxl_root(iter);
- down = iter, iter = to_cxl_port(iter->dev.parent)) {
- struct cxl_ep *ep;
-
- ep = cxl_ep_load(iter, cxlmd);
- ep->next = down;
- }
-
- endpoint = devm_cxl_add_port(&parent_port->dev, &cxlmd->dev,
- cxlds->component_reg_phys, parent_dport);
- if (IS_ERR(endpoint))
- return PTR_ERR(endpoint);
-
- rc = cxl_endpoint_autoremove(cxlmd, endpoint);
- if (rc)
- return rc;
-
- if (!endpoint->dev.driver) {
- dev_err(&cxlmd->dev, "%s failed probe\n",
- dev_name(&endpoint->dev));
- return -ENXIO;
- }
-
- return 0;
-}
-EXPORT_SYMBOL_NS_GPL(devm_cxl_add_endpoint, CXL);
-
static void cxl_detach_ep(void *data)
{
struct cxl_memdev *cxlmd = data;
@@ -1367,6 +1369,13 @@ int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd)
struct device *iter;
int rc;
+ /*
+ * Skip intermediate port enumeration in the RCH case, there
+ * are no ports in between a host bridge and an endpoint.
+ */
+ if (cxlmd->cxlds->rcd)
+ return 0;
+
rc = devm_add_action_or_reset(&cxlmd->dev, cxl_detach_ep, cxlmd);
if (rc)
return rc;
@@ -1844,12 +1853,27 @@ static void cxl_bus_remove(struct device *dev)
static struct workqueue_struct *cxl_bus_wq;
-int cxl_bus_rescan(void)
+static void cxl_bus_rescan_queue(struct work_struct *w)
{
- return bus_rescan_devices(&cxl_bus_type);
+ int rc = bus_rescan_devices(&cxl_bus_type);
+
+ pr_debug("CXL bus rescan result: %d\n", rc);
+}
+
+void cxl_bus_rescan(void)
+{
+ static DECLARE_WORK(rescan_work, cxl_bus_rescan_queue);
+
+ queue_work(cxl_bus_wq, &rescan_work);
}
EXPORT_SYMBOL_NS_GPL(cxl_bus_rescan, CXL);
+void cxl_bus_drain(void)
+{
+ drain_workqueue(cxl_bus_wq);
+}
+EXPORT_SYMBOL_NS_GPL(cxl_bus_drain, CXL);
+
bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd)
{
return queue_work(cxl_bus_wq, &cxlmd->detach_work);
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 3a6c3f84015f..f75df35b9d3d 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -1814,6 +1814,7 @@ static struct lock_class_key cxl_pmem_region_key;
static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr)
{
struct cxl_region_params *p = &cxlr->params;
+ struct cxl_nvdimm_bridge *cxl_nvb;
struct cxl_pmem_region *cxlr_pmem;
struct device *dev;
int i;
@@ -1841,6 +1842,18 @@ static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr)
struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
struct cxl_pmem_region_mapping *m = &cxlr_pmem->mapping[i];
+ /*
+ * Regions never span CXL root devices, so by definition the
+ * bridge for one device is the same for all.
+ */
+ if (i == 0) {
+ cxl_nvb = cxl_find_nvdimm_bridge(&cxlmd->dev);
+ if (!cxl_nvb) {
+ cxlr_pmem = ERR_PTR(-ENODEV);
+ goto out;
+ }
+ cxlr->cxl_nvb = cxl_nvb;
+ }
m->cxlmd = cxlmd;
get_device(&cxlmd->dev);
m->start = cxled->dpa_res->start;
@@ -1850,6 +1863,7 @@ static struct cxl_pmem_region *cxl_pmem_region_alloc(struct cxl_region *cxlr)
dev = &cxlr_pmem->dev;
cxlr_pmem->cxlr = cxlr;
+ cxlr->cxlr_pmem = cxlr_pmem;
device_initialize(dev);
lockdep_set_class(&dev->mutex, &cxl_pmem_region_key);
device_set_pm_not_required(dev);
@@ -1862,9 +1876,36 @@ out:
return cxlr_pmem;
}
-static void cxlr_pmem_unregister(void *dev)
+static void cxlr_pmem_unregister(void *_cxlr_pmem)
{
- device_unregister(dev);
+ struct cxl_pmem_region *cxlr_pmem = _cxlr_pmem;
+ struct cxl_region *cxlr = cxlr_pmem->cxlr;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlr->cxl_nvb;
+
+ /*
+ * Either the bridge is in ->remove() context under the device_lock(),
+ * or cxlr_release_nvdimm() is cancelling the bridge's release action
+ * for @cxlr_pmem and doing it itself (while manually holding the bridge
+ * lock).
+ */
+ device_lock_assert(&cxl_nvb->dev);
+ cxlr->cxlr_pmem = NULL;
+ cxlr_pmem->cxlr = NULL;
+ device_unregister(&cxlr_pmem->dev);
+}
+
+static void cxlr_release_nvdimm(void *_cxlr)
+{
+ struct cxl_region *cxlr = _cxlr;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlr->cxl_nvb;
+
+ device_lock(&cxl_nvb->dev);
+ if (cxlr->cxlr_pmem)
+ devm_release_action(&cxl_nvb->dev, cxlr_pmem_unregister,
+ cxlr->cxlr_pmem);
+ device_unlock(&cxl_nvb->dev);
+ cxlr->cxl_nvb = NULL;
+ put_device(&cxl_nvb->dev);
}
/**
@@ -1876,12 +1917,14 @@ static void cxlr_pmem_unregister(void *dev)
static int devm_cxl_add_pmem_region(struct cxl_region *cxlr)
{
struct cxl_pmem_region *cxlr_pmem;
+ struct cxl_nvdimm_bridge *cxl_nvb;
struct device *dev;
int rc;
cxlr_pmem = cxl_pmem_region_alloc(cxlr);
if (IS_ERR(cxlr_pmem))
return PTR_ERR(cxlr_pmem);
+ cxl_nvb = cxlr->cxl_nvb;
dev = &cxlr_pmem->dev;
rc = dev_set_name(dev, "pmem_region%d", cxlr->id);
@@ -1895,10 +1938,25 @@ static int devm_cxl_add_pmem_region(struct cxl_region *cxlr)
dev_dbg(&cxlr->dev, "%s: register %s\n", dev_name(dev->parent),
dev_name(dev));
- return devm_add_action_or_reset(&cxlr->dev, cxlr_pmem_unregister, dev);
+ device_lock(&cxl_nvb->dev);
+ if (cxl_nvb->dev.driver)
+ rc = devm_add_action_or_reset(&cxl_nvb->dev,
+ cxlr_pmem_unregister, cxlr_pmem);
+ else
+ rc = -ENXIO;
+ device_unlock(&cxl_nvb->dev);
+
+ if (rc)
+ goto err_bridge;
+
+ /* @cxlr carries a reference on @cxl_nvb until cxlr_release_nvdimm */
+ return devm_add_action_or_reset(&cxlr->dev, cxlr_release_nvdimm, cxlr);
err:
put_device(dev);
+err_bridge:
+ put_device(&cxl_nvb->dev);
+ cxlr->cxl_nvb = NULL;
return rc;
}
diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c
index ec178e69b18f..1173912b9cf7 100644
--- a/drivers/cxl/core/regs.c
+++ b/drivers/cxl/core/regs.c
@@ -307,3 +307,68 @@ int cxl_find_regblock(struct pci_dev *pdev, enum cxl_regloc_type type,
return -ENODEV;
}
EXPORT_SYMBOL_NS_GPL(cxl_find_regblock, CXL);
+
+resource_size_t cxl_rcrb_to_component(struct device *dev,
+ resource_size_t rcrb,
+ enum cxl_rcrb which)
+{
+ resource_size_t component_reg_phys;
+ u32 bar0, bar1;
+ void *addr;
+ u16 cmd;
+ u32 id;
+
+ if (which == CXL_RCRB_UPSTREAM)
+ rcrb += SZ_4K;
+
+ /*
+ * RCRB's BAR[0..1] point to component block containing CXL
+ * subsystem component registers. MEMBAR extraction follows
+ * the PCI Base spec here, esp. 64 bit extraction and memory
+ * ranges alignment (6.0, 7.5.1.2.1).
+ */
+ if (!request_mem_region(rcrb, SZ_4K, "CXL RCRB"))
+ return CXL_RESOURCE_NONE;
+ addr = ioremap(rcrb, SZ_4K);
+ if (!addr) {
+ dev_err(dev, "Failed to map region %pr\n", addr);
+ release_mem_region(rcrb, SZ_4K);
+ return CXL_RESOURCE_NONE;
+ }
+
+ id = readl(addr + PCI_VENDOR_ID);
+ cmd = readw(addr + PCI_COMMAND);
+ bar0 = readl(addr + PCI_BASE_ADDRESS_0);
+ bar1 = readl(addr + PCI_BASE_ADDRESS_1);
+ iounmap(addr);
+ release_mem_region(rcrb, SZ_4K);
+
+ /*
+ * Sanity check, see CXL 3.0 Figure 9-8 CXL Device that Does Not
+ * Remap Upstream Port and Component Registers
+ */
+ if (id == U32_MAX) {
+ if (which == CXL_RCRB_DOWNSTREAM)
+ dev_err(dev, "Failed to access Downstream Port RCRB\n");
+ return CXL_RESOURCE_NONE;
+ }
+ if (!(cmd & PCI_COMMAND_MEMORY))
+ return CXL_RESOURCE_NONE;
+ /* The RCRB is a Memory Window, and the MEM_TYPE_1M bit is obsolete */
+ if (bar0 & (PCI_BASE_ADDRESS_MEM_TYPE_1M | PCI_BASE_ADDRESS_SPACE_IO))
+ return CXL_RESOURCE_NONE;
+
+ component_reg_phys = bar0 & PCI_BASE_ADDRESS_MEM_MASK;
+ if (bar0 & PCI_BASE_ADDRESS_MEM_TYPE_64)
+ component_reg_phys |= ((u64)bar1) << 32;
+
+ if (!component_reg_phys)
+ return CXL_RESOURCE_NONE;
+
+ /* MEMBAR is block size (64k) aligned. */
+ if (!IS_ALIGNED(component_reg_phys, CXL_COMPONENT_REG_BLOCK_SIZE))
+ return CXL_RESOURCE_NONE;
+
+ return component_reg_phys;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_rcrb_to_component, CXL);
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index e5e1abceeca7..8b7fb33d368b 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -223,6 +223,14 @@ enum cxl_regloc_type;
int cxl_find_regblock(struct pci_dev *pdev, enum cxl_regloc_type type,
struct cxl_register_map *map);
+enum cxl_rcrb {
+ CXL_RCRB_DOWNSTREAM,
+ CXL_RCRB_UPSTREAM,
+};
+resource_size_t cxl_rcrb_to_component(struct device *dev,
+ resource_size_t rcrb,
+ enum cxl_rcrb which);
+
#define CXL_RESOURCE_NONE ((resource_size_t) -1)
#define CXL_TARGET_STRLEN 20
@@ -392,6 +400,8 @@ struct cxl_region_params {
* @id: This region's id. Id is globally unique across all regions
* @mode: Endpoint decoder allocation / access mode
* @type: Endpoint decoder target type
+ * @cxl_nvb: nvdimm bridge for coordinating @cxlr_pmem setup / shutdown
+ * @cxlr_pmem: (for pmem regions) cached copy of the nvdimm bridge
* @flags: Region state flags
* @params: active + config params for the region
*/
@@ -400,32 +410,18 @@ struct cxl_region {
int id;
enum cxl_decoder_mode mode;
enum cxl_decoder_type type;
+ struct cxl_nvdimm_bridge *cxl_nvb;
+ struct cxl_pmem_region *cxlr_pmem;
unsigned long flags;
struct cxl_region_params params;
};
-/**
- * enum cxl_nvdimm_brige_state - state machine for managing bus rescans
- * @CXL_NVB_NEW: Set at bridge create and after cxl_pmem_wq is destroyed
- * @CXL_NVB_DEAD: Set at brige unregistration to preclude async probing
- * @CXL_NVB_ONLINE: Target state after successful ->probe()
- * @CXL_NVB_OFFLINE: Target state after ->remove() or failed ->probe()
- */
-enum cxl_nvdimm_brige_state {
- CXL_NVB_NEW,
- CXL_NVB_DEAD,
- CXL_NVB_ONLINE,
- CXL_NVB_OFFLINE,
-};
-
struct cxl_nvdimm_bridge {
int id;
struct device dev;
struct cxl_port *port;
struct nvdimm_bus *nvdimm_bus;
struct nvdimm_bus_descriptor nd_desc;
- struct work_struct state_work;
- enum cxl_nvdimm_brige_state state;
};
#define CXL_DEV_ID_LEN 19
@@ -433,8 +429,6 @@ struct cxl_nvdimm_bridge {
struct cxl_nvdimm {
struct device dev;
struct cxl_memdev *cxlmd;
- struct cxl_nvdimm_bridge *bridge;
- struct xarray pmem_regions;
u8 dev_id[CXL_DEV_ID_LEN]; /* for nvdimm, string of 'serial' */
};
@@ -450,7 +444,6 @@ struct cxl_pmem_region {
struct device dev;
struct cxl_region *cxlr;
struct nd_region *nd_region;
- struct cxl_nvdimm_bridge *bridge;
struct range hpa_range;
int nr_mappings;
struct cxl_pmem_region_mapping mapping[];
@@ -512,12 +505,16 @@ cxl_find_dport_by_dev(struct cxl_port *port, const struct device *dport_dev)
* @dport: PCI bridge or firmware device representing the downstream link
* @port_id: unique hardware identifier for dport in decoder target list
* @component_reg_phys: downstream port component registers
+ * @rcrb: base address for the Root Complex Register Block
+ * @rch: Indicate whether this dport was enumerated in RCH or VH mode
* @port: reference to cxl_port that contains this downstream port
*/
struct cxl_dport {
struct device *dport;
int port_id;
resource_size_t component_reg_phys;
+ resource_size_t rcrb;
+ bool rch;
struct cxl_port *port;
};
@@ -574,11 +571,10 @@ struct pci_bus *cxl_port_to_pci_bus(struct cxl_port *port);
struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport,
resource_size_t component_reg_phys,
struct cxl_dport *parent_dport);
-int devm_cxl_add_endpoint(struct cxl_memdev *cxlmd,
- struct cxl_dport *parent_dport);
struct cxl_port *find_cxl_root(struct device *dev);
int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd);
-int cxl_bus_rescan(void);
+void cxl_bus_rescan(void);
+void cxl_bus_drain(void);
struct cxl_port *cxl_mem_find_port(struct cxl_memdev *cxlmd,
struct cxl_dport **dport);
bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd);
@@ -586,6 +582,10 @@ bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd);
struct cxl_dport *devm_cxl_add_dport(struct cxl_port *port,
struct device *dport, int port_id,
resource_size_t component_reg_phys);
+struct cxl_dport *devm_cxl_add_rch_dport(struct cxl_port *port,
+ struct device *dport_dev, int port_id,
+ resource_size_t component_reg_phys,
+ resource_size_t rcrb);
struct cxl_decoder *to_cxl_decoder(struct device *dev);
struct cxl_root_decoder *to_cxl_root_decoder(struct device *dev);
@@ -649,7 +649,7 @@ struct cxl_nvdimm_bridge *devm_cxl_add_nvdimm_bridge(struct device *host,
struct cxl_nvdimm *to_cxl_nvdimm(struct device *dev);
bool is_cxl_nvdimm(struct device *dev);
bool is_cxl_nvdimm_bridge(struct device *dev);
-int devm_cxl_add_nvdimm(struct device *host, struct cxl_memdev *cxlmd);
+int devm_cxl_add_nvdimm(struct cxl_memdev *cxlmd);
struct cxl_nvdimm_bridge *cxl_find_nvdimm_bridge(struct device *dev);
#ifdef CONFIG_CXL_REGION
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 75baeb0bbe57..710c7694bf9f 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -35,6 +35,8 @@
* @cdev: char dev core object for ioctl operations
* @cxlds: The device state backing this device
* @detach_work: active memdev lost a port in its ancestry
+ * @cxl_nvb: coordinate removal of @cxl_nvd if present
+ * @cxl_nvd: optional bridge to an nvdimm if the device supports pmem
* @id: id number of this memdev instance.
*/
struct cxl_memdev {
@@ -42,6 +44,8 @@ struct cxl_memdev {
struct cdev cdev;
struct cxl_dev_state *cxlds;
struct work_struct detach_work;
+ struct cxl_nvdimm_bridge *cxl_nvb;
+ struct cxl_nvdimm *cxl_nvd;
int id;
};
@@ -76,6 +80,15 @@ static inline bool is_cxl_endpoint(struct cxl_port *port)
struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds);
+static inline struct cxl_ep *cxl_ep_load(struct cxl_port *port,
+ struct cxl_memdev *cxlmd)
+{
+ if (!port)
+ return NULL;
+
+ return xa_load(&port->endpoints, (unsigned long)&cxlmd->dev);
+}
+
/**
* struct cxl_mbox_cmd - A command to be submitted to hardware.
* @opcode: (input) The command set and command submitted to hardware.
@@ -188,6 +201,7 @@ struct cxl_endpoint_dvsec_info {
* @dev: The device associated with this CXL state
* @regs: Parsed register blocks
* @cxl_dvsec: Offset to the PCIe device DVSEC
+ * @rcd: operating in RCD mode (CXL 3.0 9.11.8 CXL Devices Attached to an RCH)
* @payload_size: Size of space for payload
* (CXL 2.0 8.2.8.4.3 Mailbox Capabilities Register)
* @lsa_size: Size of Label Storage Area
@@ -222,6 +236,7 @@ struct cxl_dev_state {
struct cxl_regs regs;
int cxl_dvsec;
+ bool rcd;
size_t payload_size;
size_t lsa_size;
struct mutex mbox_mutex; /* Protects device mailbox and firmware */
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 64ccf053d32c..39c4b54f0715 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -45,9 +45,60 @@ static int cxl_mem_dpa_show(struct seq_file *file, void *data)
return 0;
}
+static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
+ struct cxl_dport *parent_dport)
+{
+ struct cxl_port *parent_port = parent_dport->port;
+ struct cxl_dev_state *cxlds = cxlmd->cxlds;
+ struct cxl_port *endpoint, *iter, *down;
+ resource_size_t component_reg_phys;
+ int rc;
+
+ /*
+ * Now that the path to the root is established record all the
+ * intervening ports in the chain.
+ */
+ for (iter = parent_port, down = NULL; !is_cxl_root(iter);
+ down = iter, iter = to_cxl_port(iter->dev.parent)) {
+ struct cxl_ep *ep;
+
+ ep = cxl_ep_load(iter, cxlmd);
+ ep->next = down;
+ }
+
+ /*
+ * The component registers for an RCD might come from the
+ * host-bridge RCRB if they are not already mapped via the
+ * typical register locator mechanism.
+ */
+ if (parent_dport->rch && cxlds->component_reg_phys == CXL_RESOURCE_NONE)
+ component_reg_phys = cxl_rcrb_to_component(
+ &cxlmd->dev, parent_dport->rcrb, CXL_RCRB_UPSTREAM);
+ else
+ component_reg_phys = cxlds->component_reg_phys;
+ endpoint = devm_cxl_add_port(host, &cxlmd->dev, component_reg_phys,
+ parent_dport);
+ if (IS_ERR(endpoint))
+ return PTR_ERR(endpoint);
+
+ rc = cxl_endpoint_autoremove(cxlmd, endpoint);
+ if (rc)
+ return rc;
+
+ if (!endpoint->dev.driver) {
+ dev_err(&cxlmd->dev, "%s failed probe\n",
+ dev_name(&endpoint->dev));
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
static int cxl_mem_probe(struct device *dev)
{
struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
+ struct cxl_dev_state *cxlds = cxlmd->cxlds;
+ struct device *endpoint_parent;
struct cxl_port *parent_port;
struct cxl_dport *dport;
struct dentry *dentry;
@@ -80,21 +131,34 @@ static int cxl_mem_probe(struct device *dev)
return -ENXIO;
}
- device_lock(&parent_port->dev);
- if (!parent_port->dev.driver) {
+ if (dport->rch)
+ endpoint_parent = parent_port->uport;
+ else
+ endpoint_parent = &parent_port->dev;
+
+ device_lock(endpoint_parent);
+ if (!endpoint_parent->driver) {
dev_err(dev, "CXL port topology %s not enabled\n",
- dev_name(&parent_port->dev));
+ dev_name(endpoint_parent));
rc = -ENXIO;
goto unlock;
}
- rc = devm_cxl_add_endpoint(cxlmd, dport);
+ rc = devm_cxl_add_endpoint(endpoint_parent, cxlmd, dport);
unlock:
- device_unlock(&parent_port->dev);
+ device_unlock(endpoint_parent);
put_device(&parent_port->dev);
if (rc)
return rc;
+ if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM)) {
+ rc = devm_cxl_add_nvdimm(cxlmd);
+ if (rc == -ENODEV)
+ dev_info(dev, "PMEM disabled by platform\n");
+ else
+ return rc;
+ }
+
/*
* The kernel may be operating out of CXL memory on this device,
* there is no spec defined way to determine whether this device
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 621a0522b554..73ff6c33a0c0 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -433,6 +433,15 @@ static void devm_cxl_pci_create_doe(struct cxl_dev_state *cxlds)
}
}
+/*
+ * Assume that any RCIEP that emits the CXL memory expander class code
+ * is an RCD
+ */
+static bool is_cxl_restricted(struct pci_dev *pdev)
+{
+ return pci_pcie_type(pdev) == PCI_EXP_TYPE_RC_END;
+}
+
static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct cxl_register_map map;
@@ -455,6 +464,7 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (IS_ERR(cxlds))
return PTR_ERR(cxlds);
+ cxlds->rcd = is_cxl_restricted(pdev);
cxlds->serial = pci_get_dsn(pdev);
cxlds->cxl_dvsec = pci_find_dvsec_capability(
pdev, PCI_DVSEC_VENDOR_ID_CXL, CXL_DVSEC_PCIE_DEVICE);
@@ -503,9 +513,6 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
- if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM))
- rc = devm_cxl_add_nvdimm(&pdev->dev, cxlmd);
-
return rc;
}
diff --git a/drivers/cxl/pmem.c b/drivers/cxl/pmem.c
index ab40c93c44e5..2fc8070b6a17 100644
--- a/drivers/cxl/pmem.c
+++ b/drivers/cxl/pmem.c
@@ -13,13 +13,6 @@
extern const struct nvdimm_security_ops *cxl_security_ops;
-/*
- * Ordered workqueue for cxl nvdimm device arrival and departure
- * to coordinate bus rescans when a bridge arrives and trigger remove
- * operations when the bridge is removed.
- */
-static struct workqueue_struct *cxl_pmem_wq;
-
static __read_mostly DECLARE_BITMAP(exclusive_cmds, CXL_MEM_COMMAND_ID_MAX);
static void clear_exclusive(void *cxlds)
@@ -29,26 +22,7 @@ static void clear_exclusive(void *cxlds)
static void unregister_nvdimm(void *nvdimm)
{
- struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
- struct cxl_nvdimm_bridge *cxl_nvb = cxl_nvd->bridge;
- struct cxl_pmem_region *cxlr_pmem;
- unsigned long index;
-
- device_lock(&cxl_nvb->dev);
- dev_set_drvdata(&cxl_nvd->dev, NULL);
- xa_for_each(&cxl_nvd->pmem_regions, index, cxlr_pmem) {
- get_device(&cxlr_pmem->dev);
- device_unlock(&cxl_nvb->dev);
-
- device_release_driver(&cxlr_pmem->dev);
- put_device(&cxlr_pmem->dev);
-
- device_lock(&cxl_nvb->dev);
- }
- device_unlock(&cxl_nvb->dev);
-
nvdimm_delete(nvdimm);
- cxl_nvd->bridge = NULL;
}
static ssize_t provider_show(struct device *dev, struct device_attribute *attr, char *buf)
@@ -90,26 +64,16 @@ static int cxl_nvdimm_probe(struct device *dev)
{
struct cxl_nvdimm *cxl_nvd = to_cxl_nvdimm(dev);
struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlmd->cxl_nvb;
unsigned long flags = 0, cmd_mask = 0;
struct cxl_dev_state *cxlds = cxlmd->cxlds;
- struct cxl_nvdimm_bridge *cxl_nvb;
struct nvdimm *nvdimm;
int rc;
- cxl_nvb = cxl_find_nvdimm_bridge(dev);
- if (!cxl_nvb)
- return -ENXIO;
-
- device_lock(&cxl_nvb->dev);
- if (!cxl_nvb->nvdimm_bus) {
- rc = -ENXIO;
- goto out;
- }
-
set_exclusive_cxl_commands(cxlds, exclusive_cmds);
rc = devm_add_action_or_reset(dev, clear_exclusive, cxlds);
if (rc)
- goto out;
+ return rc;
set_bit(NDD_LABELING, &flags);
set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
@@ -119,25 +83,20 @@ static int cxl_nvdimm_probe(struct device *dev)
cxl_dimm_attribute_groups, flags,
cmd_mask, 0, NULL, cxl_nvd->dev_id,
cxl_security_ops, NULL);
- if (!nvdimm) {
- rc = -ENOMEM;
- goto out;
- }
+ if (!nvdimm)
+ return -ENOMEM;
dev_set_drvdata(dev, nvdimm);
- cxl_nvd->bridge = cxl_nvb;
- rc = devm_add_action_or_reset(dev, unregister_nvdimm, nvdimm);
-out:
- device_unlock(&cxl_nvb->dev);
- put_device(&cxl_nvb->dev);
-
- return rc;
+ return devm_add_action_or_reset(dev, unregister_nvdimm, nvdimm);
}
static struct cxl_driver cxl_nvdimm_driver = {
.name = "cxl_nvdimm",
.probe = cxl_nvdimm_probe,
.id = CXL_DEVICE_NVDIMM,
+ .drv = {
+ .suppress_bind_attrs = true,
+ },
};
static int cxl_pmem_get_config_size(struct cxl_dev_state *cxlds,
@@ -255,204 +214,48 @@ static int cxl_pmem_ctl(struct nvdimm_bus_descriptor *nd_desc,
return cxl_pmem_nvdimm_ctl(nvdimm, cmd, buf, buf_len);
}
-static bool online_nvdimm_bus(struct cxl_nvdimm_bridge *cxl_nvb)
-{
- if (cxl_nvb->nvdimm_bus)
- return true;
- cxl_nvb->nvdimm_bus =
- nvdimm_bus_register(&cxl_nvb->dev, &cxl_nvb->nd_desc);
- return cxl_nvb->nvdimm_bus != NULL;
-}
-
-static int cxl_nvdimm_release_driver(struct device *dev, void *cxl_nvb)
-{
- struct cxl_nvdimm *cxl_nvd;
-
- if (!is_cxl_nvdimm(dev))
- return 0;
-
- cxl_nvd = to_cxl_nvdimm(dev);
- if (cxl_nvd->bridge != cxl_nvb)
- return 0;
-
- device_release_driver(dev);
- return 0;
-}
-
-static int cxl_pmem_region_release_driver(struct device *dev, void *cxl_nvb)
-{
- struct cxl_pmem_region *cxlr_pmem;
-
- if (!is_cxl_pmem_region(dev))
- return 0;
-
- cxlr_pmem = to_cxl_pmem_region(dev);
- if (cxlr_pmem->bridge != cxl_nvb)
- return 0;
-
- device_release_driver(dev);
- return 0;
-}
-
-static void offline_nvdimm_bus(struct cxl_nvdimm_bridge *cxl_nvb,
- struct nvdimm_bus *nvdimm_bus)
+static void unregister_nvdimm_bus(void *_cxl_nvb)
{
- if (!nvdimm_bus)
- return;
+ struct cxl_nvdimm_bridge *cxl_nvb = _cxl_nvb;
+ struct nvdimm_bus *nvdimm_bus = cxl_nvb->nvdimm_bus;
- /*
- * Set the state of cxl_nvdimm devices to unbound / idle before
- * nvdimm_bus_unregister() rips the nvdimm objects out from
- * underneath them.
- */
- bus_for_each_dev(&cxl_bus_type, NULL, cxl_nvb,
- cxl_pmem_region_release_driver);
- bus_for_each_dev(&cxl_bus_type, NULL, cxl_nvb,
- cxl_nvdimm_release_driver);
+ cxl_nvb->nvdimm_bus = NULL;
nvdimm_bus_unregister(nvdimm_bus);
}
-static void cxl_nvb_update_state(struct work_struct *work)
-{
- struct cxl_nvdimm_bridge *cxl_nvb =
- container_of(work, typeof(*cxl_nvb), state_work);
- struct nvdimm_bus *victim_bus = NULL;
- bool release = false, rescan = false;
-
- device_lock(&cxl_nvb->dev);
- switch (cxl_nvb->state) {
- case CXL_NVB_ONLINE:
- if (!online_nvdimm_bus(cxl_nvb)) {
- dev_err(&cxl_nvb->dev,
- "failed to establish nvdimm bus\n");
- release = true;
- } else
- rescan = true;
- break;
- case CXL_NVB_OFFLINE:
- case CXL_NVB_DEAD:
- victim_bus = cxl_nvb->nvdimm_bus;
- cxl_nvb->nvdimm_bus = NULL;
- break;
- default:
- break;
- }
- device_unlock(&cxl_nvb->dev);
-
- if (release)
- device_release_driver(&cxl_nvb->dev);
- if (rescan) {
- int rc = bus_rescan_devices(&cxl_bus_type);
-
- dev_dbg(&cxl_nvb->dev, "rescan: %d\n", rc);
- }
- offline_nvdimm_bus(cxl_nvb, victim_bus);
-
- put_device(&cxl_nvb->dev);
-}
-
-static void cxl_nvdimm_bridge_state_work(struct cxl_nvdimm_bridge *cxl_nvb)
-{
- /*
- * Take a reference that the workqueue will drop if new work
- * gets queued.
- */
- get_device(&cxl_nvb->dev);
- if (!queue_work(cxl_pmem_wq, &cxl_nvb->state_work))
- put_device(&cxl_nvb->dev);
-}
-
-static void cxl_nvdimm_bridge_remove(struct device *dev)
-{
- struct cxl_nvdimm_bridge *cxl_nvb = to_cxl_nvdimm_bridge(dev);
-
- if (cxl_nvb->state == CXL_NVB_ONLINE)
- cxl_nvb->state = CXL_NVB_OFFLINE;
- cxl_nvdimm_bridge_state_work(cxl_nvb);
-}
-
static int cxl_nvdimm_bridge_probe(struct device *dev)
{
struct cxl_nvdimm_bridge *cxl_nvb = to_cxl_nvdimm_bridge(dev);
- if (cxl_nvb->state == CXL_NVB_DEAD)
- return -ENXIO;
-
- if (cxl_nvb->state == CXL_NVB_NEW) {
- cxl_nvb->nd_desc = (struct nvdimm_bus_descriptor) {
- .provider_name = "CXL",
- .module = THIS_MODULE,
- .ndctl = cxl_pmem_ctl,
- };
+ cxl_nvb->nd_desc = (struct nvdimm_bus_descriptor) {
+ .provider_name = "CXL",
+ .module = THIS_MODULE,
+ .ndctl = cxl_pmem_ctl,
+ };
- INIT_WORK(&cxl_nvb->state_work, cxl_nvb_update_state);
- }
+ cxl_nvb->nvdimm_bus =
+ nvdimm_bus_register(&cxl_nvb->dev, &cxl_nvb->nd_desc);
- cxl_nvb->state = CXL_NVB_ONLINE;
- cxl_nvdimm_bridge_state_work(cxl_nvb);
+ if (!cxl_nvb->nvdimm_bus)
+ return -ENOMEM;
- return 0;
+ return devm_add_action_or_reset(dev, unregister_nvdimm_bus, cxl_nvb);
}
static struct cxl_driver cxl_nvdimm_bridge_driver = {
.name = "cxl_nvdimm_bridge",
.probe = cxl_nvdimm_bridge_probe,
- .remove = cxl_nvdimm_bridge_remove,
.id = CXL_DEVICE_NVDIMM_BRIDGE,
+ .drv = {
+ .suppress_bind_attrs = true,
+ },
};
-static int match_cxl_nvdimm(struct device *dev, void *data)
-{
- return is_cxl_nvdimm(dev);
-}
-
static void unregister_nvdimm_region(void *nd_region)
{
nvdimm_region_delete(nd_region);
}
-static int cxl_nvdimm_add_region(struct cxl_nvdimm *cxl_nvd,
- struct cxl_pmem_region *cxlr_pmem)
-{
- int rc;
-
- rc = xa_insert(&cxl_nvd->pmem_regions, (unsigned long)cxlr_pmem,
- cxlr_pmem, GFP_KERNEL);
- if (rc)
- return rc;
-
- get_device(&cxlr_pmem->dev);
- return 0;
-}
-
-static void cxl_nvdimm_del_region(struct cxl_nvdimm *cxl_nvd,
- struct cxl_pmem_region *cxlr_pmem)
-{
- /*
- * It is possible this is called without a corresponding
- * cxl_nvdimm_add_region for @cxlr_pmem
- */
- cxlr_pmem = xa_erase(&cxl_nvd->pmem_regions, (unsigned long)cxlr_pmem);
- if (cxlr_pmem)
- put_device(&cxlr_pmem->dev);
-}
-
-static void release_mappings(void *data)
-{
- int i;
- struct cxl_pmem_region *cxlr_pmem = data;
- struct cxl_nvdimm_bridge *cxl_nvb = cxlr_pmem->bridge;
-
- device_lock(&cxl_nvb->dev);
- for (i = 0; i < cxlr_pmem->nr_mappings; i++) {
- struct cxl_pmem_region_mapping *m = &cxlr_pmem->mapping[i];
- struct cxl_nvdimm *cxl_nvd = m->cxl_nvd;
-
- cxl_nvdimm_del_region(cxl_nvd, cxlr_pmem);
- }
- device_unlock(&cxl_nvb->dev);
-}
-
static void cxlr_pmem_remove_resource(void *res)
{
remove_resource(res);
@@ -468,8 +271,8 @@ static int cxl_pmem_region_probe(struct device *dev)
struct nd_mapping_desc mappings[CXL_DECODER_MAX_INTERLEAVE];
struct cxl_pmem_region *cxlr_pmem = to_cxl_pmem_region(dev);
struct cxl_region *cxlr = cxlr_pmem->cxlr;
+ struct cxl_nvdimm_bridge *cxl_nvb = cxlr->cxl_nvb;
struct cxl_pmem_region_info *info = NULL;
- struct cxl_nvdimm_bridge *cxl_nvb;
struct nd_interleave_set *nd_set;
struct nd_region_desc ndr_desc;
struct cxl_nvdimm *cxl_nvd;
@@ -477,28 +280,12 @@ static int cxl_pmem_region_probe(struct device *dev)
struct resource *res;
int rc, i = 0;
- cxl_nvb = cxl_find_nvdimm_bridge(&cxlr_pmem->mapping[0].cxlmd->dev);
- if (!cxl_nvb) {
- dev_dbg(dev, "bridge not found\n");
- return -ENXIO;
- }
- cxlr_pmem->bridge = cxl_nvb;
-
- device_lock(&cxl_nvb->dev);
- if (!cxl_nvb->nvdimm_bus) {
- dev_dbg(dev, "nvdimm bus not found\n");
- rc = -ENXIO;
- goto out_nvb;
- }
-
memset(&mappings, 0, sizeof(mappings));
memset(&ndr_desc, 0, sizeof(ndr_desc));
res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL);
- if (!res) {
- rc = -ENOMEM;
- goto out_nvb;
- }
+ if (!res)
+ return -ENOMEM;
res->name = "Persistent Memory";
res->start = cxlr_pmem->hpa_range.start;
@@ -508,11 +295,11 @@ static int cxl_pmem_region_probe(struct device *dev)
rc = insert_resource(&iomem_resource, res);
if (rc)
- goto out_nvb;
+ return rc;
rc = devm_add_action_or_reset(dev, cxlr_pmem_remove_resource, res);
if (rc)
- goto out_nvb;
+ return rc;
ndr_desc.res = res;
ndr_desc.provider_data = cxlr_pmem;
@@ -526,43 +313,23 @@ static int cxl_pmem_region_probe(struct device *dev)
}
nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL);
- if (!nd_set) {
- rc = -ENOMEM;
- goto out_nvb;
- }
+ if (!nd_set)
+ return -ENOMEM;
ndr_desc.memregion = cxlr->id;
set_bit(ND_REGION_CXL, &ndr_desc.flags);
set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc.flags);
info = kmalloc_array(cxlr_pmem->nr_mappings, sizeof(*info), GFP_KERNEL);
- if (!info) {
- rc = -ENOMEM;
- goto out_nvb;
- }
-
- rc = devm_add_action_or_reset(dev, release_mappings, cxlr_pmem);
- if (rc)
- goto out_nvd;
+ if (!info)
+ return -ENOMEM;
for (i = 0; i < cxlr_pmem->nr_mappings; i++) {
struct cxl_pmem_region_mapping *m = &cxlr_pmem->mapping[i];
struct cxl_memdev *cxlmd = m->cxlmd;
struct cxl_dev_state *cxlds = cxlmd->cxlds;
- struct device *d;
-
- d = device_find_child(&cxlmd->dev, NULL, match_cxl_nvdimm);
- if (!d) {
- dev_dbg(dev, "[%d]: %s: no cxl_nvdimm found\n", i,
- dev_name(&cxlmd->dev));
- rc = -ENODEV;
- goto out_nvd;
- }
- /* safe to drop ref now with bridge lock held */
- put_device(d);
-
- cxl_nvd = to_cxl_nvdimm(d);
+ cxl_nvd = cxlmd->cxl_nvd;
nvdimm = dev_get_drvdata(&cxl_nvd->dev);
if (!nvdimm) {
dev_dbg(dev, "[%d]: %s: no nvdimm found\n", i,
@@ -571,14 +338,6 @@ static int cxl_pmem_region_probe(struct device *dev)
goto out_nvd;
}
- /*
- * Pin the region per nvdimm device as those may be released
- * out-of-order with respect to the region, and a single nvdimm
- * maybe associated with multiple regions
- */
- rc = cxl_nvdimm_add_region(cxl_nvd, cxlr_pmem);
- if (rc)
- goto out_nvd;
m->cxl_nvd = cxl_nvd;
mappings[i] = (struct nd_mapping_desc) {
.nvdimm = nvdimm,
@@ -611,9 +370,6 @@ static int cxl_pmem_region_probe(struct device *dev)
cxlr_pmem->nd_region);
out_nvd:
kfree(info);
-out_nvb:
- device_unlock(&cxl_nvb->dev);
- put_device(&cxl_nvb->dev);
return rc;
}
@@ -622,33 +378,11 @@ static struct cxl_driver cxl_pmem_region_driver = {
.name = "cxl_pmem_region",
.probe = cxl_pmem_region_probe,
.id = CXL_DEVICE_PMEM_REGION,
+ .drv = {
+ .suppress_bind_attrs = true,
+ },
};
-/*
- * Return all bridges to the CXL_NVB_NEW state to invalidate any
- * ->state_work referring to the now destroyed cxl_pmem_wq.
- */
-static int cxl_nvdimm_bridge_reset(struct device *dev, void *data)
-{
- struct cxl_nvdimm_bridge *cxl_nvb;
-
- if (!is_cxl_nvdimm_bridge(dev))
- return 0;
-
- cxl_nvb = to_cxl_nvdimm_bridge(dev);
- device_lock(dev);
- cxl_nvb->state = CXL_NVB_NEW;
- device_unlock(dev);
-
- return 0;
-}
-
-static void destroy_cxl_pmem_wq(void)
-{
- destroy_workqueue(cxl_pmem_wq);
- bus_for_each_dev(&cxl_bus_type, NULL, NULL, cxl_nvdimm_bridge_reset);
-}
-
static __init int cxl_pmem_init(void)
{
int rc;
@@ -656,13 +390,9 @@ static __init int cxl_pmem_init(void)
set_bit(CXL_MEM_COMMAND_ID_SET_SHUTDOWN_STATE, exclusive_cmds);
set_bit(CXL_MEM_COMMAND_ID_SET_LSA, exclusive_cmds);
- cxl_pmem_wq = alloc_ordered_workqueue("cxl_pmem", 0);
- if (!cxl_pmem_wq)
- return -ENXIO;
-
rc = cxl_driver_register(&cxl_nvdimm_bridge_driver);
if (rc)
- goto err_bridge;
+ return rc;
rc = cxl_driver_register(&cxl_nvdimm_driver);
if (rc)
@@ -678,8 +408,6 @@ err_region:
cxl_driver_unregister(&cxl_nvdimm_driver);
err_nvdimm:
cxl_driver_unregister(&cxl_nvdimm_bridge_driver);
-err_bridge:
- destroy_cxl_pmem_wq();
return rc;
}
@@ -688,7 +416,6 @@ static __exit void cxl_pmem_exit(void)
cxl_driver_unregister(&cxl_pmem_region_driver);
cxl_driver_unregister(&cxl_nvdimm_driver);
cxl_driver_unregister(&cxl_nvdimm_bridge_driver);
- destroy_cxl_pmem_wq();
}
MODULE_LICENSE("GPL v2");
diff --git a/tools/testing/cxl/Kbuild b/tools/testing/cxl/Kbuild
index e4048a05b6ab..0805f08af8b3 100644
--- a/tools/testing/cxl/Kbuild
+++ b/tools/testing/cxl/Kbuild
@@ -10,6 +10,7 @@ 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
+ldflags-y += --wrap=cxl_rcrb_to_component
DRIVERS := ../../../drivers
CXL_SRC := $(DRIVERS)/cxl
diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index facfcd11cb67..ffe775178507 100644
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -13,9 +13,11 @@
#define NR_CXL_HOST_BRIDGES 2
#define NR_CXL_SINGLE_HOST 1
+#define NR_CXL_RCH 1
#define NR_CXL_ROOT_PORTS 2
#define NR_CXL_SWITCH_PORTS 2
#define NR_CXL_PORT_DECODERS 8
+#define NR_BRIDGES (NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + NR_CXL_RCH)
static struct platform_device *cxl_acpi;
static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
@@ -35,6 +37,8 @@ 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 struct platform_device *cxl_rch[NR_CXL_RCH];
+static struct platform_device *cxl_rcd[NR_CXL_RCH];
static inline bool is_multi_bridge(struct device *dev)
{
@@ -57,7 +61,7 @@ static inline bool is_single_bridge(struct device *dev)
}
static struct acpi_device acpi0017_mock;
-static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST] = {
+static struct acpi_device host_bridge[NR_BRIDGES] = {
[0] = {
.handle = &host_bridge[0],
},
@@ -67,7 +71,9 @@ static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST]
[2] = {
.handle = &host_bridge[2],
},
-
+ [3] = {
+ .handle = &host_bridge[3],
+ },
};
static bool is_mock_dev(struct device *dev)
@@ -80,6 +86,9 @@ static bool is_mock_dev(struct device *dev)
for (i = 0; i < ARRAY_SIZE(cxl_mem_single); i++)
if (dev == &cxl_mem_single[i]->dev)
return true;
+ for (i = 0; i < ARRAY_SIZE(cxl_rcd); i++)
+ if (dev == &cxl_rcd[i]->dev)
+ return true;
if (dev == &cxl_acpi->dev)
return true;
return false;
@@ -101,7 +110,7 @@ static bool is_mock_adev(struct acpi_device *adev)
static struct {
struct acpi_table_cedt cedt;
- struct acpi_cedt_chbs chbs[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST];
+ struct acpi_cedt_chbs chbs[NR_BRIDGES];
struct {
struct acpi_cedt_cfmws cfmws;
u32 target[1];
@@ -122,6 +131,10 @@ static struct {
struct acpi_cedt_cfmws cfmws;
u32 target[1];
} cfmws4;
+ struct {
+ struct acpi_cedt_cfmws cfmws;
+ u32 target[1];
+ } cfmws5;
} __packed mock_cedt = {
.cedt = {
.header = {
@@ -154,6 +167,14 @@ static struct {
.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_CXL11,
+ },
.cfmws0 = {
.cfmws = {
.header = {
@@ -229,6 +250,21 @@ static struct {
},
.target = { 2 },
},
+ .cfmws5 = {
+ .cfmws = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws5),
+ },
+ .interleave_ways = 0,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
+ ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
+ .qtg_id = 5,
+ .window_size = SZ_256M,
+ },
+ .target = { 3 },
+ },
};
struct acpi_cedt_cfmws *mock_cfmws[] = {
@@ -237,6 +273,7 @@ struct acpi_cedt_cfmws *mock_cfmws[] = {
[2] = &mock_cedt.cfmws2.cfmws,
[3] = &mock_cedt.cfmws3.cfmws,
[4] = &mock_cedt.cfmws4.cfmws,
+ [5] = &mock_cedt.cfmws5.cfmws,
};
struct cxl_mock_res {
@@ -262,11 +299,11 @@ static void depopulate_all_mock_resources(void)
mutex_unlock(&mock_res_lock);
}
-static struct cxl_mock_res *alloc_mock_res(resource_size_t size)
+static struct cxl_mock_res *alloc_mock_res(resource_size_t size, int align)
{
struct cxl_mock_res *res = kzalloc(sizeof(*res), GFP_KERNEL);
struct genpool_data_align data = {
- .align = SZ_256M,
+ .align = align,
};
unsigned long phys;
@@ -301,7 +338,7 @@ static int populate_cedt(void)
else
size = ACPI_CEDT_CHBS_LENGTH_CXL11;
- res = alloc_mock_res(size);
+ res = alloc_mock_res(size, size);
if (!res)
return -ENOMEM;
chbs->base = res->range.start;
@@ -311,7 +348,7 @@ static int populate_cedt(void)
for (i = 0; i < ARRAY_SIZE(mock_cfmws); i++) {
struct acpi_cedt_cfmws *window = mock_cfmws[i];
- res = alloc_mock_res(window->window_size);
+ res = alloc_mock_res(window->window_size, SZ_256M);
if (!res)
return -ENOMEM;
window->base_hpa = res->range.start;
@@ -320,10 +357,12 @@ static int populate_cedt(void)
return 0;
}
+static bool is_mock_port(struct device *dev);
+
/*
- * 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
+ * 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 a cxl_test device being probed by the cxl_acpi
* driver.
*/
struct cxl_cedt_context {
@@ -340,7 +379,7 @@ static int mock_acpi_table_parse_cedt(enum acpi_cedt_type id,
unsigned long end;
int i;
- if (dev != &cxl_acpi->dev)
+ if (!is_mock_port(dev) && !is_mock_dev(dev))
return acpi_table_parse_cedt(id, handler_arg, arg);
if (id == ACPI_CEDT_TYPE_CHBS)
@@ -370,6 +409,10 @@ static bool is_mock_bridge(struct device *dev)
for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++)
if (dev == &cxl_hb_single[i]->dev)
return true;
+ for (i = 0; i < ARRAY_SIZE(cxl_rch); i++)
+ if (dev == &cxl_rch[i]->dev)
+ return true;
+
return false;
}
@@ -439,7 +482,7 @@ mock_acpi_evaluate_integer(acpi_handle handle, acpi_string pathname,
return AE_OK;
}
-static struct pci_bus mock_pci_bus[NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST];
+static struct pci_bus mock_pci_bus[NR_BRIDGES];
static struct acpi_pci_root mock_pci_root[ARRAY_SIZE(mock_pci_bus)] = {
[0] = {
.bus = &mock_pci_bus[0],
@@ -450,6 +493,9 @@ static struct acpi_pci_root mock_pci_root[ARRAY_SIZE(mock_pci_bus)] = {
[2] = {
.bus = &mock_pci_bus[2],
},
+ [3] = {
+ .bus = &mock_pci_bus[3],
+ },
};
@@ -694,6 +740,15 @@ static int mock_cxl_port_enumerate_dports(struct cxl_port *port)
return 0;
}
+resource_size_t mock_cxl_rcrb_to_component(struct device *dev,
+ resource_size_t rcrb,
+ enum cxl_rcrb which)
+{
+ dev_dbg(dev, "rcrb: %pa which: %d\n", &rcrb, which);
+
+ return (resource_size_t) which + 1;
+}
+
static struct cxl_mock_ops cxl_mock_ops = {
.is_mock_adev = is_mock_adev,
.is_mock_bridge = is_mock_bridge,
@@ -702,6 +757,7 @@ static struct cxl_mock_ops cxl_mock_ops = {
.is_mock_dev = is_mock_dev,
.acpi_table_parse_cedt = mock_acpi_table_parse_cedt,
.acpi_evaluate_integer = mock_acpi_evaluate_integer,
+ .cxl_rcrb_to_component = mock_cxl_rcrb_to_component,
.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,
@@ -726,6 +782,87 @@ static void mock_companion(struct acpi_device *adev, struct device *dev)
#define SZ_512G (SZ_64G * 8)
#endif
+static __init int cxl_rch_init(void)
+{
+ int rc, i;
+
+ for (i = 0; i < ARRAY_SIZE(cxl_rch); i++) {
+ int idx = NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + i;
+ struct acpi_device *adev = &host_bridge[idx];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_host_bridge", idx);
+ 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_rch[i] = pdev;
+ mock_pci_bus[idx].bridge = &pdev->dev;
+ rc = sysfs_create_link(&pdev->dev.kobj, &pdev->dev.kobj,
+ "firmware_node");
+ if (rc)
+ goto err_bridge;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(cxl_rcd); i++) {
+ int idx = NR_MEM_MULTI + NR_MEM_SINGLE + i;
+ struct platform_device *rch = cxl_rch[i];
+ struct platform_device *pdev;
+
+ pdev = platform_device_alloc("cxl_rcd", idx);
+ if (!pdev)
+ goto err_mem;
+ pdev->dev.parent = &rch->dev;
+ set_dev_node(&pdev->dev, i % 2);
+
+ rc = platform_device_add(pdev);
+ if (rc) {
+ platform_device_put(pdev);
+ goto err_mem;
+ }
+ cxl_rcd[i] = pdev;
+ }
+
+ return 0;
+
+err_mem:
+ for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_rcd[i]);
+err_bridge:
+ for (i = ARRAY_SIZE(cxl_rch) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_rch[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "firmware_node");
+ platform_device_unregister(cxl_rch[i]);
+ }
+
+ return rc;
+}
+
+static void cxl_rch_exit(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--)
+ platform_device_unregister(cxl_rcd[i]);
+ for (i = ARRAY_SIZE(cxl_rch) - 1; i >= 0; i--) {
+ struct platform_device *pdev = cxl_rch[i];
+
+ if (!pdev)
+ continue;
+ sysfs_remove_link(&pdev->dev.kobj, "firmware_node");
+ platform_device_unregister(cxl_rch[i]);
+ }
+}
+
static __init int cxl_single_init(void)
{
int i, rc;
@@ -998,9 +1135,13 @@ static __init int cxl_test_init(void)
if (rc)
goto err_mem;
+ rc = cxl_rch_init();
+ if (rc)
+ goto err_single;
+
cxl_acpi = platform_device_alloc("cxl_acpi", 0);
if (!cxl_acpi)
- goto err_single;
+ goto err_rch;
mock_companion(&acpi0017_mock, &cxl_acpi->dev);
acpi0017_mock.dev.bus = &platform_bus_type;
@@ -1013,6 +1154,8 @@ static __init int cxl_test_init(void)
err_add:
platform_device_put(cxl_acpi);
+err_rch:
+ cxl_rch_exit();
err_single:
cxl_single_exit();
err_mem:
@@ -1050,6 +1193,7 @@ static __exit void cxl_test_exit(void)
int i;
platform_device_unregister(cxl_acpi);
+ cxl_rch_exit();
cxl_single_exit();
for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--)
platform_device_unregister(cxl_mem[i]);
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 35d9ad04e0d6..5e4ecd93f1d2 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -112,6 +112,24 @@ static int mock_get_log(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
return 0;
}
+static int mock_rcd_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_identify id = {
+ .fw_revision = { "mock fw v1 " },
+ .total_capacity =
+ cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
+ .volatile_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_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_identify id = {
@@ -553,7 +571,10 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
rc = mock_get_log(cxlds, cmd);
break;
case CXL_MBOX_OP_IDENTIFY:
- rc = mock_id(cxlds, cmd);
+ if (cxlds->rcd)
+ rc = mock_rcd_id(cxlds, cmd);
+ else
+ rc = mock_id(cxlds, cmd);
break;
case CXL_MBOX_OP_GET_LSA:
rc = mock_get_lsa(cxlds, cmd);
@@ -600,6 +621,13 @@ static void label_area_release(void *lsa)
vfree(lsa);
}
+static bool is_rcd(struct platform_device *pdev)
+{
+ const struct platform_device_id *id = platform_get_device_id(pdev);
+
+ return !!id->driver_data;
+}
+
static int cxl_mock_mem_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -627,6 +655,10 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
cxlds->serial = pdev->id;
cxlds->mbox_send = cxl_mock_mbox_send;
cxlds->payload_size = SZ_4K;
+ if (is_rcd(pdev)) {
+ cxlds->rcd = true;
+ cxlds->component_reg_phys = CXL_RESOURCE_NONE;
+ }
rc = cxl_enumerate_cmds(cxlds);
if (rc)
@@ -644,9 +676,6 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
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;
}
@@ -690,7 +719,8 @@ static struct attribute *cxl_mock_mem_attrs[] = {
ATTRIBUTE_GROUPS(cxl_mock_mem);
static const struct platform_device_id cxl_mock_mem_ids[] = {
- { .name = "cxl_mem", },
+ { .name = "cxl_mem", 0 },
+ { .name = "cxl_rcd", 1 },
{ },
};
MODULE_DEVICE_TABLE(platform, cxl_mock_mem_ids);
diff --git a/tools/testing/cxl/test/mock.c b/tools/testing/cxl/test/mock.c
index bce6a21df0d5..5dface08e0de 100644
--- a/tools/testing/cxl/test/mock.c
+++ b/tools/testing/cxl/test/mock.c
@@ -224,6 +224,25 @@ int __wrap_cxl_hdm_decode_init(struct cxl_dev_state *cxlds,
}
EXPORT_SYMBOL_NS_GPL(__wrap_cxl_hdm_decode_init, CXL);
+resource_size_t __wrap_cxl_rcrb_to_component(struct device *dev,
+ resource_size_t rcrb,
+ enum cxl_rcrb which)
+{
+ int index;
+ resource_size_t component_reg_phys;
+ struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+ if (ops && ops->is_mock_port(dev))
+ component_reg_phys =
+ ops->cxl_rcrb_to_component(dev, rcrb, which);
+ else
+ component_reg_phys = cxl_rcrb_to_component(dev, rcrb, which);
+ put_cxl_mock_ops(index);
+
+ return component_reg_phys;
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_cxl_rcrb_to_component, 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
index 738f24e3988a..ef33f159375e 100644
--- a/tools/testing/cxl/test/mock.h
+++ b/tools/testing/cxl/test/mock.h
@@ -15,6 +15,9 @@ struct cxl_mock_ops {
acpi_string pathname,
struct acpi_object_list *arguments,
unsigned long long *data);
+ resource_size_t (*cxl_rcrb_to_component)(struct device *dev,
+ resource_size_t rcrb,
+ enum cxl_rcrb which);
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);
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