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Merge branch 'for-6.8/cxl-cdat' into for-6.8/cxl

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Pick up some follow-on fixes for 'cxl_root' reference count leaks.
This commit is contained in:
Dan Williams 2024-01-05 18:59:06 -08:00
commit d3953c78fc
6 changed files with 44 additions and 27 deletions
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6
drivers/cxl/acpi.c
View File

@ -295,14 +295,12 @@ out:
return rc;
}
static int cxl_acpi_qos_class(struct cxl_port *root_port,
static int cxl_acpi_qos_class(struct cxl_root *cxl_root,
struct access_coordinate *coord, int entries,
int *qos_class)
{
struct device *dev = cxl_root->port.uport_dev;
acpi_handle handle;
struct device *dev;
dev = root_port->uport_dev;
if (!dev_is_platform(dev))
return -ENODEV;

22
drivers/cxl/core/cdat.c
View File

@ -162,8 +162,6 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
struct xarray *dsmas_xa)
{
struct access_coordinate c;
struct cxl_port *root_port;
struct cxl_root *cxl_root;
struct dsmas_entry *dent;
int valid_entries = 0;
unsigned long index;
@ -175,8 +173,11 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
return rc;
}
root_port = find_cxl_root(port);
cxl_root = to_cxl_root(root_port);
struct cxl_root *cxl_root __free(put_cxl_root) = find_cxl_root(port);
if (!cxl_root)
return -ENODEV;
if (!cxl_root->ops || !cxl_root->ops->qos_class)
return -EOPNOTSUPP;
@ -193,7 +194,8 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
dent->coord.write_bandwidth);
dent->entries = 1;
rc = cxl_root->ops->qos_class(root_port, &dent->coord, 1, &qos_class);
rc = cxl_root->ops->qos_class(cxl_root, &dent->coord, 1,
&qos_class);
if (rc != 1)
continue;
@ -349,15 +351,19 @@ static int cxl_qos_class_verify(struct cxl_memdev *cxlmd)
{
struct cxl_dev_state *cxlds = cxlmd->cxlds;
struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlds);
struct cxl_port *root_port __free(put_device) = NULL;
LIST_HEAD(__discard);
struct list_head *discard __free(dpa_perf) = &__discard;
struct cxl_port *root_port;
int rc;
root_port = find_cxl_root(cxlmd->endpoint);
if (!root_port)
struct cxl_root *cxl_root __free(put_cxl_root) =
find_cxl_root(cxlmd->endpoint);
if (!cxl_root)
return -ENODEV;
root_port = &cxl_root->port;
/* Check that the QTG IDs are all sane between end device and root decoders */
cxl_qos_match(root_port, &mds->ram_perf_list, discard);
cxl_qos_match(root_port, &mds->pmem_perf_list, discard);

8
drivers/cxl/core/pmem.c
View File

@ -64,14 +64,14 @@ static int match_nvdimm_bridge(struct device *dev, void *data)
struct cxl_nvdimm_bridge *cxl_find_nvdimm_bridge(struct cxl_memdev *cxlmd)
{
struct cxl_port *port = find_cxl_root(cxlmd->endpoint);
struct cxl_root *cxl_root __free(put_cxl_root) =
find_cxl_root(cxlmd->endpoint);
struct device *dev;
if (!port)
if (!cxl_root)
return NULL;
dev = device_find_child(&port->dev, NULL, match_nvdimm_bridge);
put_device(&port->dev);
dev = device_find_child(&cxl_root->port.dev, NULL, match_nvdimm_bridge);
if (!dev)
return NULL;

13
drivers/cxl/core/port.c
View File

@ -972,7 +972,7 @@ static bool dev_is_cxl_root_child(struct device *dev)
return false;
}
struct cxl_port *find_cxl_root(struct cxl_port *port)
struct cxl_root *find_cxl_root(struct cxl_port *port)
{
struct cxl_port *iter = port;
@ -982,10 +982,19 @@ struct cxl_port *find_cxl_root(struct cxl_port *port)
if (!iter)
return NULL;
get_device(&iter->dev);
return iter;
return to_cxl_root(iter);
}
EXPORT_SYMBOL_NS_GPL(find_cxl_root, CXL);
void put_cxl_root(struct cxl_root *cxl_root)
{
if (!cxl_root)
return;
put_device(&cxl_root->port.dev);
}
EXPORT_SYMBOL_NS_GPL(put_cxl_root, CXL);
static struct cxl_dport *find_dport(struct cxl_port *port, int id)
{
struct cxl_dport *dport;

17
drivers/cxl/cxl.h
View File

@ -617,12 +617,6 @@ struct cxl_port {
long pci_latency;
};
struct cxl_root_ops {
int (*qos_class)(struct cxl_port *root_port,
struct access_coordinate *coord, int entries,
int *qos_class);
};
/**
* struct cxl_root - logical collection of root cxl_port items
*
@ -640,6 +634,12 @@ to_cxl_root(const struct cxl_port *port)
return container_of(port, struct cxl_root, port);
}
struct cxl_root_ops {
int (*qos_class)(struct cxl_root *cxl_root,
struct access_coordinate *coord, int entries,
int *qos_class);
};
static inline struct cxl_dport *
cxl_find_dport_by_dev(struct cxl_port *port, const struct device *dport_dev)
{
@ -734,7 +734,10 @@ struct cxl_port *devm_cxl_add_port(struct device *host,
struct cxl_dport *parent_dport);
struct cxl_root *devm_cxl_add_root(struct device *host,
const struct cxl_root_ops *ops);
struct cxl_port *find_cxl_root(struct cxl_port *port);
struct cxl_root *find_cxl_root(struct cxl_port *port);
void put_cxl_root(struct cxl_root *cxl_root);
DEFINE_FREE(put_cxl_root, struct cxl_root *, if (_T) put_cxl_root(_T))
int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd);
void cxl_bus_rescan(void);
void cxl_bus_drain(void);

5
drivers/cxl/port.c
View File

@ -130,14 +130,15 @@ static int cxl_endpoint_port_probe(struct cxl_port *port)
* This can't fail in practice as CXL root exit unregisters all
* descendant ports and that in turn synchronizes with cxl_port_probe()
*/
root = find_cxl_root(port);
struct cxl_root *cxl_root __free(put_cxl_root) = find_cxl_root(port);
root = &cxl_root->port;
/*
* Now that all endpoint decoders are successfully enumerated, try to
* assemble regions from committed decoders
*/
device_for_each_child(&port->dev, root, discover_region);
put_device(&root->dev);
return 0;
}