diff options
Diffstat (limited to 'drivers/cxl/cxl.h')
| -rw-r--r-- | drivers/cxl/cxl.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index bfd95acea66c..621a70e023c1 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -278,6 +278,17 @@ struct cxl_dport { struct list_head list; }; +/* + * The platform firmware device hosting the root is also the top of the + * CXL port topology. All other CXL ports have another CXL port as their + * parent and their ->uport / host device is out-of-line of the port + * ancestry. + */ +static inline bool is_cxl_root(struct cxl_port *port) +{ + return port->uport == port->dev.parent; +} + struct cxl_port *to_cxl_port(struct device *dev); struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport, resource_size_t component_reg_phys, @@ -288,7 +299,10 @@ int cxl_add_dport(struct cxl_port *port, struct device *dport, int port_id, struct cxl_decoder *to_cxl_decoder(struct device *dev); bool is_root_decoder(struct device *dev); -struct cxl_decoder *cxl_decoder_alloc(struct cxl_port *port, int nr_targets); +struct cxl_decoder *cxl_root_decoder_alloc(struct cxl_port *port, + unsigned int nr_targets); +struct cxl_decoder *cxl_switch_decoder_alloc(struct cxl_port *port, + unsigned int nr_targets); int cxl_decoder_add(struct cxl_decoder *cxld, int *target_map); int cxl_decoder_autoremove(struct device *host, struct cxl_decoder *cxld); |