Save the number of decoders committed to a port exposed by the kernel to the libcxl cxl_port context. The attribute is helpful for determing if a region is active. Add libcxl API to retrieve the number of decoders committed. Add the decoders_committed attribute to the port for cxl list command.
Link: https://lore.kernel.org/linux-cxl/169645700414.623072.3893376765415910289.stgit@djiang5-mobl3/T/#t Signed-off-by: Dave Jiang <[email protected]> --- Documentation/cxl/lib/libcxl.txt | 1 + cxl/json.c | 4 ++++ cxl/lib/libcxl.c | 9 +++++++++ cxl/lib/libcxl.sym | 5 +++++ cxl/lib/private.h | 1 + cxl/libcxl.h | 1 + 6 files changed, 21 insertions(+) diff --git a/Documentation/cxl/lib/libcxl.txt b/Documentation/cxl/lib/libcxl.txt index 31bc85511270..0b51d8b0012c 100644 --- a/Documentation/cxl/lib/libcxl.txt +++ b/Documentation/cxl/lib/libcxl.txt @@ -294,6 +294,7 @@ bool cxl_port_is_endpoint(struct cxl_port *port); int cxl_port_get_depth(struct cxl_port *port); bool cxl_port_hosts_memdev(struct cxl_port *port, struct cxl_memdev *memdev); int cxl_port_get_nr_dports(struct cxl_port *port); +struct cxl_port *cxl_port_decoders_committed(struct cxl_port *port); ---- The port type is communicated via cxl_port_is_<type>(). An 'enabled' port is one that has succeeded in discovering the CXL component registers in diff --git a/cxl/json.c b/cxl/json.c index 7678d02020b6..33800c6f9024 100644 --- a/cxl/json.c +++ b/cxl/json.c @@ -1120,6 +1120,10 @@ static struct json_object *__util_cxl_port_to_json(struct cxl_port *port, json_object_object_add(jport, "state", jobj); } + jobj = json_object_new_int(cxl_port_decoders_committed(port)); + if (jobj) + json_object_object_add(jport, "decoders_committed", jobj); + json_object_set_userdata(jport, port, NULL); return jport; } diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index af4ca44eae19..759713110cd1 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -1833,6 +1833,10 @@ static int cxl_port_init(struct cxl_port *port, struct cxl_port *parent_port, if (sysfs_read_attr(ctx, path, buf) == 0) port->module = util_modalias_to_module(ctx, buf); + sprintf(path, "%s/decoders_committed", cxlport_base); + if (sysfs_read_attr(ctx, path, buf) == 0) + port->decoders_committed = strtoul(buf, NULL, 0); + free(path); return 0; err: @@ -3071,6 +3075,11 @@ cxl_port_get_dport_by_memdev(struct cxl_port *port, struct cxl_memdev *memdev) return NULL; } +CXL_EXPORT int cxl_port_decoders_committed(struct cxl_port *port) +{ + return port->decoders_committed; +} + static void *add_cxl_bus(void *parent, int id, const char *cxlbus_base) { const char *devname = devpath_to_devname(cxlbus_base); diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index 8fa1cca3d0d7..17b43ac39056 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -264,3 +264,8 @@ global: cxl_memdev_update_fw; cxl_memdev_cancel_fw_update; } LIBCXL_5; + +LIBCXL_7 { +global: + cxl_port_decoders_committed; +} LIBCXL_6; diff --git a/cxl/lib/private.h b/cxl/lib/private.h index a641727000f1..aaaecba74096 100644 --- a/cxl/lib/private.h +++ b/cxl/lib/private.h @@ -87,6 +87,7 @@ struct cxl_port { int dports_init; int nr_dports; int depth; + int decoders_committed; struct cxl_ctx *ctx; struct cxl_bus *bus; enum cxl_port_type type; diff --git a/cxl/libcxl.h b/cxl/libcxl.h index 0f4f4b2648fb..9d9b4cc57769 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -145,6 +145,7 @@ bool cxl_port_hosts_memdev(struct cxl_port *port, struct cxl_memdev *memdev); int cxl_port_get_nr_dports(struct cxl_port *port); int cxl_port_disable_invalidate(struct cxl_port *port); int cxl_port_enable(struct cxl_port *port); +int cxl_port_decoders_committed(struct cxl_port *port); struct cxl_port *cxl_port_get_next_all(struct cxl_port *port, const struct cxl_port *top);
