diff options
Diffstat (limited to 'drivers/cxl/acpi.c')
| -rw-r--r-- | drivers/cxl/acpi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index 2f7de910ce57..afc712264d1c 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -513,8 +513,29 @@ static int cxl_get_chbs(struct device *dev, struct acpi_device *hb, return 0; } +static int get_genport_coordinates(struct device *dev, struct cxl_dport *dport) +{ + struct acpi_device *hb = to_cxl_host_bridge(NULL, dev); + u32 uid; + int rc; + + if (kstrtou32(acpi_device_uid(hb), 0, &uid)) + return -EINVAL; + + rc = acpi_get_genport_coordinates(uid, &dport->hb_coord); + if (rc < 0) + return rc; + + /* Adjust back to picoseconds from nanoseconds */ + dport->hb_coord.read_latency *= 1000; + dport->hb_coord.write_latency *= 1000; + + return 0; +} + static int add_host_bridge_dport(struct device *match, void *arg) { + int ret; acpi_status rc; struct device *bridge; struct cxl_dport *dport; @@ -564,6 +585,10 @@ static int add_host_bridge_dport(struct device *match, void *arg) if (IS_ERR(dport)) return PTR_ERR(dport); + ret = get_genport_coordinates(match, dport); + if (ret) + dev_dbg(match, "Failed to get generic port perf coordinates.\n"); + return 0; } |