diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-cxl | 14 | ||||
| -rw-r--r-- | drivers/misc/cxl/sysfs.c | 39 |
2 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-cxl b/Documentation/ABI/testing/sysfs-class-cxl index 2ab97527e186..5941ff38d4a3 100644 --- a/Documentation/ABI/testing/sysfs-class-cxl +++ b/Documentation/ABI/testing/sysfs-class-cxl @@ -132,3 +132,17 @@ Contact: linuxppc-dev@lists.ozlabs.org Description: read only Will return "user" or "factory" depending on the image loaded onto the card. + +What: /sys/class/cxl/<card>/load_image_on_perst +Date: December 2014 +Contact: linuxppc-dev@lists.ozlabs.org +Description: read/write + Valid entries are "none", "user", and "factory". + "none" means PERST will not cause image to be loaded to the + card. A power cycle is required to load the image. + "none" could be useful for debugging because the trace arrays + are preserved. + "user" and "factory" means PERST will cause either the user or + user or factory image to be loaded. + Default is to reload on PERST whichever image the card has + loaded. diff --git a/drivers/misc/cxl/sysfs.c b/drivers/misc/cxl/sysfs.c index 461bdbd5d483..ed4ad461143c 100644 --- a/drivers/misc/cxl/sysfs.c +++ b/drivers/misc/cxl/sysfs.c @@ -56,11 +56,50 @@ static ssize_t image_loaded_show(struct device *device, return scnprintf(buf, PAGE_SIZE, "factory\n"); } +static ssize_t load_image_on_perst_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct cxl *adapter = to_cxl_adapter(device); + + if (!adapter->perst_loads_image) + return scnprintf(buf, PAGE_SIZE, "none\n"); + + if (adapter->perst_select_user) + return scnprintf(buf, PAGE_SIZE, "user\n"); + return scnprintf(buf, PAGE_SIZE, "factory\n"); +} + +static ssize_t load_image_on_perst_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct cxl *adapter = to_cxl_adapter(device); + int rc; + + if (!strncmp(buf, "none", 4)) + adapter->perst_loads_image = false; + else if (!strncmp(buf, "user", 4)) { + adapter->perst_select_user = true; + adapter->perst_loads_image = true; + } else if (!strncmp(buf, "factory", 7)) { + adapter->perst_select_user = false; + adapter->perst_loads_image = true; + } else + return -EINVAL; + + if ((rc = cxl_update_image_control(adapter))) + return rc; + + return count; +} + static struct device_attribute adapter_attrs[] = { __ATTR_RO(caia_version), __ATTR_RO(psl_revision), __ATTR_RO(base_image), __ATTR_RO(image_loaded), + __ATTR_RW(load_image_on_perst), }; |