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![Yazen Ghannam](/assets/img/avatar_default.png)
Newer AMD systems, such as Genoa, can support up to 12 channels per EDAC
"mc" device. These are detected by the device's EDAC module, and the
current EDAC interface is properly enumerated. However, the legacy EDAC
sysfs interface provides device attributes only for channels 0 to 7.
Therefore, channels 8 to 11 will not be visible in the legacy interface.
This was overlooked in the initial support for AMD Genoa.
Add additional device attributes so that up to 12 channels are visible
in the legacy EDAC sysfs interface.
Fixes: e2be5955a8
("EDAC/amd64: Add support for AMD Family 19h Models 10h-1Fh and A0h-AFh")
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20221018153630.14664-1-yazen.ghannam@amd.com
1055 lines
27 KiB
C
1055 lines
27 KiB
C
/*
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* edac_mc kernel module
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* (C) 2005-2007 Linux Networx (http://lnxi.com)
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*
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Written Doug Thompson <norsk5@xmission.com> www.softwarebitmaker.com
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*
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* (c) 2012-2013 - Mauro Carvalho Chehab
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* The entire API were re-written, and ported to use struct device
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*
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*/
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/edac.h>
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#include <linux/bug.h>
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#include <linux/pm_runtime.h>
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#include <linux/uaccess.h>
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#include "edac_mc.h"
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#include "edac_module.h"
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/* MC EDAC Controls, setable by module parameter, and sysfs */
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static int edac_mc_log_ue = 1;
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static int edac_mc_log_ce = 1;
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static int edac_mc_panic_on_ue;
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static unsigned int edac_mc_poll_msec = 1000;
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/* Getter functions for above */
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int edac_mc_get_log_ue(void)
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{
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return edac_mc_log_ue;
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}
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int edac_mc_get_log_ce(void)
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{
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return edac_mc_log_ce;
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}
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int edac_mc_get_panic_on_ue(void)
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{
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return edac_mc_panic_on_ue;
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}
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/* this is temporary */
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unsigned int edac_mc_get_poll_msec(void)
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{
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return edac_mc_poll_msec;
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}
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static int edac_set_poll_msec(const char *val, const struct kernel_param *kp)
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{
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unsigned int i;
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int ret;
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if (!val)
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return -EINVAL;
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ret = kstrtouint(val, 0, &i);
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if (ret)
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return ret;
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if (i < 1000)
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return -EINVAL;
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*((unsigned int *)kp->arg) = i;
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/* notify edac_mc engine to reset the poll period */
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edac_mc_reset_delay_period(i);
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return 0;
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}
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/* Parameter declarations for above */
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module_param(edac_mc_panic_on_ue, int, 0644);
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MODULE_PARM_DESC(edac_mc_panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
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module_param(edac_mc_log_ue, int, 0644);
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MODULE_PARM_DESC(edac_mc_log_ue,
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"Log uncorrectable error to console: 0=off 1=on");
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module_param(edac_mc_log_ce, int, 0644);
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MODULE_PARM_DESC(edac_mc_log_ce,
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"Log correctable error to console: 0=off 1=on");
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module_param_call(edac_mc_poll_msec, edac_set_poll_msec, param_get_uint,
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&edac_mc_poll_msec, 0644);
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MODULE_PARM_DESC(edac_mc_poll_msec, "Polling period in milliseconds");
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static struct device *mci_pdev;
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/*
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* various constants for Memory Controllers
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*/
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static const char * const dev_types[] = {
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[DEV_UNKNOWN] = "Unknown",
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[DEV_X1] = "x1",
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[DEV_X2] = "x2",
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[DEV_X4] = "x4",
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[DEV_X8] = "x8",
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[DEV_X16] = "x16",
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[DEV_X32] = "x32",
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[DEV_X64] = "x64"
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};
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static const char * const edac_caps[] = {
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[EDAC_UNKNOWN] = "Unknown",
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[EDAC_NONE] = "None",
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[EDAC_RESERVED] = "Reserved",
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[EDAC_PARITY] = "PARITY",
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[EDAC_EC] = "EC",
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[EDAC_SECDED] = "SECDED",
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[EDAC_S2ECD2ED] = "S2ECD2ED",
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[EDAC_S4ECD4ED] = "S4ECD4ED",
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[EDAC_S8ECD8ED] = "S8ECD8ED",
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[EDAC_S16ECD16ED] = "S16ECD16ED"
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};
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#ifdef CONFIG_EDAC_LEGACY_SYSFS
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/*
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* EDAC sysfs CSROW data structures and methods
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*/
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#define to_csrow(k) container_of(k, struct csrow_info, dev)
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/*
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* We need it to avoid namespace conflicts between the legacy API
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* and the per-dimm/per-rank one
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*/
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#define DEVICE_ATTR_LEGACY(_name, _mode, _show, _store) \
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static struct device_attribute dev_attr_legacy_##_name = __ATTR(_name, _mode, _show, _store)
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struct dev_ch_attribute {
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struct device_attribute attr;
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unsigned int channel;
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};
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#define DEVICE_CHANNEL(_name, _mode, _show, _store, _var) \
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static struct dev_ch_attribute dev_attr_legacy_##_name = \
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{ __ATTR(_name, _mode, _show, _store), (_var) }
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#define to_channel(k) (container_of(k, struct dev_ch_attribute, attr)->channel)
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/* Set of more default csrow<id> attribute show/store functions */
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static ssize_t csrow_ue_count_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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return sprintf(data, "%u\n", csrow->ue_count);
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}
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static ssize_t csrow_ce_count_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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return sprintf(data, "%u\n", csrow->ce_count);
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}
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static ssize_t csrow_size_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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int i;
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u32 nr_pages = 0;
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for (i = 0; i < csrow->nr_channels; i++)
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nr_pages += csrow->channels[i]->dimm->nr_pages;
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return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
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}
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static ssize_t csrow_mem_type_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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return sprintf(data, "%s\n", edac_mem_types[csrow->channels[0]->dimm->mtype]);
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}
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static ssize_t csrow_dev_type_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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return sprintf(data, "%s\n", dev_types[csrow->channels[0]->dimm->dtype]);
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}
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static ssize_t csrow_edac_mode_show(struct device *dev,
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struct device_attribute *mattr,
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char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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return sprintf(data, "%s\n", edac_caps[csrow->channels[0]->dimm->edac_mode]);
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}
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/* show/store functions for DIMM Label attributes */
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static ssize_t channel_dimm_label_show(struct device *dev,
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struct device_attribute *mattr,
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char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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unsigned int chan = to_channel(mattr);
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struct rank_info *rank = csrow->channels[chan];
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/* if field has not been initialized, there is nothing to send */
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if (!rank->dimm->label[0])
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return 0;
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return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
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rank->dimm->label);
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}
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static ssize_t channel_dimm_label_store(struct device *dev,
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struct device_attribute *mattr,
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const char *data, size_t count)
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{
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struct csrow_info *csrow = to_csrow(dev);
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unsigned int chan = to_channel(mattr);
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struct rank_info *rank = csrow->channels[chan];
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size_t copy_count = count;
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if (count == 0)
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return -EINVAL;
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if (data[count - 1] == '\0' || data[count - 1] == '\n')
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copy_count -= 1;
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if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
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return -EINVAL;
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strncpy(rank->dimm->label, data, copy_count);
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rank->dimm->label[copy_count] = '\0';
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return count;
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}
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/* show function for dynamic chX_ce_count attribute */
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static ssize_t channel_ce_count_show(struct device *dev,
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struct device_attribute *mattr, char *data)
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{
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struct csrow_info *csrow = to_csrow(dev);
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unsigned int chan = to_channel(mattr);
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struct rank_info *rank = csrow->channels[chan];
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return sprintf(data, "%u\n", rank->ce_count);
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}
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/* cwrow<id>/attribute files */
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DEVICE_ATTR_LEGACY(size_mb, S_IRUGO, csrow_size_show, NULL);
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DEVICE_ATTR_LEGACY(dev_type, S_IRUGO, csrow_dev_type_show, NULL);
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DEVICE_ATTR_LEGACY(mem_type, S_IRUGO, csrow_mem_type_show, NULL);
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DEVICE_ATTR_LEGACY(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL);
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DEVICE_ATTR_LEGACY(ue_count, S_IRUGO, csrow_ue_count_show, NULL);
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DEVICE_ATTR_LEGACY(ce_count, S_IRUGO, csrow_ce_count_show, NULL);
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/* default attributes of the CSROW<id> object */
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static struct attribute *csrow_attrs[] = {
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&dev_attr_legacy_dev_type.attr,
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&dev_attr_legacy_mem_type.attr,
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&dev_attr_legacy_edac_mode.attr,
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&dev_attr_legacy_size_mb.attr,
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&dev_attr_legacy_ue_count.attr,
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&dev_attr_legacy_ce_count.attr,
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NULL,
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};
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static const struct attribute_group csrow_attr_grp = {
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.attrs = csrow_attrs,
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};
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static const struct attribute_group *csrow_attr_groups[] = {
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&csrow_attr_grp,
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NULL
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};
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static const struct device_type csrow_attr_type = {
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.groups = csrow_attr_groups,
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};
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/*
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* possible dynamic channel DIMM Label attribute files
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*
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*/
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DEVICE_CHANNEL(ch0_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 0);
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DEVICE_CHANNEL(ch1_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 1);
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DEVICE_CHANNEL(ch2_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 2);
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DEVICE_CHANNEL(ch3_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 3);
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DEVICE_CHANNEL(ch4_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 4);
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DEVICE_CHANNEL(ch5_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 5);
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DEVICE_CHANNEL(ch6_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 6);
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DEVICE_CHANNEL(ch7_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 7);
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DEVICE_CHANNEL(ch8_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 8);
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DEVICE_CHANNEL(ch9_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 9);
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DEVICE_CHANNEL(ch10_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 10);
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DEVICE_CHANNEL(ch11_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 11);
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/* Total possible dynamic DIMM Label attribute file table */
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static struct attribute *dynamic_csrow_dimm_attr[] = {
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&dev_attr_legacy_ch0_dimm_label.attr.attr,
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&dev_attr_legacy_ch1_dimm_label.attr.attr,
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&dev_attr_legacy_ch2_dimm_label.attr.attr,
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&dev_attr_legacy_ch3_dimm_label.attr.attr,
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&dev_attr_legacy_ch4_dimm_label.attr.attr,
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&dev_attr_legacy_ch5_dimm_label.attr.attr,
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&dev_attr_legacy_ch6_dimm_label.attr.attr,
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&dev_attr_legacy_ch7_dimm_label.attr.attr,
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&dev_attr_legacy_ch8_dimm_label.attr.attr,
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&dev_attr_legacy_ch9_dimm_label.attr.attr,
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&dev_attr_legacy_ch10_dimm_label.attr.attr,
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&dev_attr_legacy_ch11_dimm_label.attr.attr,
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NULL
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};
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/* possible dynamic channel ce_count attribute files */
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DEVICE_CHANNEL(ch0_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 0);
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DEVICE_CHANNEL(ch1_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 1);
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DEVICE_CHANNEL(ch2_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 2);
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DEVICE_CHANNEL(ch3_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 3);
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DEVICE_CHANNEL(ch4_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 4);
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DEVICE_CHANNEL(ch5_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 5);
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DEVICE_CHANNEL(ch6_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 6);
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DEVICE_CHANNEL(ch7_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 7);
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DEVICE_CHANNEL(ch8_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 8);
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DEVICE_CHANNEL(ch9_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 9);
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DEVICE_CHANNEL(ch10_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 10);
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DEVICE_CHANNEL(ch11_ce_count, S_IRUGO,
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channel_ce_count_show, NULL, 11);
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/* Total possible dynamic ce_count attribute file table */
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static struct attribute *dynamic_csrow_ce_count_attr[] = {
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&dev_attr_legacy_ch0_ce_count.attr.attr,
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&dev_attr_legacy_ch1_ce_count.attr.attr,
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&dev_attr_legacy_ch2_ce_count.attr.attr,
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&dev_attr_legacy_ch3_ce_count.attr.attr,
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&dev_attr_legacy_ch4_ce_count.attr.attr,
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&dev_attr_legacy_ch5_ce_count.attr.attr,
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&dev_attr_legacy_ch6_ce_count.attr.attr,
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&dev_attr_legacy_ch7_ce_count.attr.attr,
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&dev_attr_legacy_ch8_ce_count.attr.attr,
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&dev_attr_legacy_ch9_ce_count.attr.attr,
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&dev_attr_legacy_ch10_ce_count.attr.attr,
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&dev_attr_legacy_ch11_ce_count.attr.attr,
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NULL
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};
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static umode_t csrow_dev_is_visible(struct kobject *kobj,
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struct attribute *attr, int idx)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct csrow_info *csrow = container_of(dev, struct csrow_info, dev);
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if (idx >= csrow->nr_channels)
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return 0;
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if (idx >= ARRAY_SIZE(dynamic_csrow_ce_count_attr) - 1) {
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WARN_ONCE(1, "idx: %d\n", idx);
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return 0;
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}
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/* Only expose populated DIMMs */
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if (!csrow->channels[idx]->dimm->nr_pages)
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return 0;
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return attr->mode;
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}
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static const struct attribute_group csrow_dev_dimm_group = {
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.attrs = dynamic_csrow_dimm_attr,
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.is_visible = csrow_dev_is_visible,
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};
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static const struct attribute_group csrow_dev_ce_count_group = {
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.attrs = dynamic_csrow_ce_count_attr,
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.is_visible = csrow_dev_is_visible,
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};
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static const struct attribute_group *csrow_dev_groups[] = {
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&csrow_dev_dimm_group,
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&csrow_dev_ce_count_group,
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NULL
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};
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static void csrow_release(struct device *dev)
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{
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/*
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* Nothing to do, just unregister sysfs here. The mci
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* device owns the data and will also release it.
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*/
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}
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static inline int nr_pages_per_csrow(struct csrow_info *csrow)
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{
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int chan, nr_pages = 0;
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for (chan = 0; chan < csrow->nr_channels; chan++)
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nr_pages += csrow->channels[chan]->dimm->nr_pages;
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return nr_pages;
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}
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|
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/* Create a CSROW object under specifed edac_mc_device */
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static int edac_create_csrow_object(struct mem_ctl_info *mci,
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struct csrow_info *csrow, int index)
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{
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int err;
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csrow->dev.type = &csrow_attr_type;
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csrow->dev.groups = csrow_dev_groups;
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csrow->dev.release = csrow_release;
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|
device_initialize(&csrow->dev);
|
|
csrow->dev.parent = &mci->dev;
|
|
csrow->mci = mci;
|
|
dev_set_name(&csrow->dev, "csrow%d", index);
|
|
dev_set_drvdata(&csrow->dev, csrow);
|
|
|
|
err = device_add(&csrow->dev);
|
|
if (err) {
|
|
edac_dbg(1, "failure: create device %s\n", dev_name(&csrow->dev));
|
|
put_device(&csrow->dev);
|
|
return err;
|
|
}
|
|
|
|
edac_dbg(0, "device %s created\n", dev_name(&csrow->dev));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Create a CSROW object under specifed edac_mc_device */
|
|
static int edac_create_csrow_objects(struct mem_ctl_info *mci)
|
|
{
|
|
int err, i;
|
|
struct csrow_info *csrow;
|
|
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
csrow = mci->csrows[i];
|
|
if (!nr_pages_per_csrow(csrow))
|
|
continue;
|
|
err = edac_create_csrow_object(mci, mci->csrows[i], i);
|
|
if (err < 0)
|
|
goto error;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
for (--i; i >= 0; i--) {
|
|
if (device_is_registered(&mci->csrows[i]->dev))
|
|
device_unregister(&mci->csrows[i]->dev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
if (device_is_registered(&mci->csrows[i]->dev))
|
|
device_unregister(&mci->csrows[i]->dev);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Per-dimm (or per-rank) devices
|
|
*/
|
|
|
|
#define to_dimm(k) container_of(k, struct dimm_info, dev)
|
|
|
|
/* show/store functions for DIMM Label attributes */
|
|
static ssize_t dimmdev_location_show(struct device *dev,
|
|
struct device_attribute *mattr, char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
ssize_t count;
|
|
|
|
count = edac_dimm_info_location(dimm, data, PAGE_SIZE);
|
|
count += scnprintf(data + count, PAGE_SIZE - count, "\n");
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t dimmdev_label_show(struct device *dev,
|
|
struct device_attribute *mattr, char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
/* if field has not been initialized, there is nothing to send */
|
|
if (!dimm->label[0])
|
|
return 0;
|
|
|
|
return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
|
|
}
|
|
|
|
static ssize_t dimmdev_label_store(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
const char *data,
|
|
size_t count)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
size_t copy_count = count;
|
|
|
|
if (count == 0)
|
|
return -EINVAL;
|
|
|
|
if (data[count - 1] == '\0' || data[count - 1] == '\n')
|
|
copy_count -= 1;
|
|
|
|
if (copy_count == 0 || copy_count >= sizeof(dimm->label))
|
|
return -EINVAL;
|
|
|
|
strncpy(dimm->label, data, copy_count);
|
|
dimm->label[copy_count] = '\0';
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t dimmdev_size_show(struct device *dev,
|
|
struct device_attribute *mattr, char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%u\n", PAGES_TO_MiB(dimm->nr_pages));
|
|
}
|
|
|
|
static ssize_t dimmdev_mem_type_show(struct device *dev,
|
|
struct device_attribute *mattr, char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%s\n", edac_mem_types[dimm->mtype]);
|
|
}
|
|
|
|
static ssize_t dimmdev_dev_type_show(struct device *dev,
|
|
struct device_attribute *mattr, char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%s\n", dev_types[dimm->dtype]);
|
|
}
|
|
|
|
static ssize_t dimmdev_edac_mode_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%s\n", edac_caps[dimm->edac_mode]);
|
|
}
|
|
|
|
static ssize_t dimmdev_ce_count_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%u\n", dimm->ce_count);
|
|
}
|
|
|
|
static ssize_t dimmdev_ue_count_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct dimm_info *dimm = to_dimm(dev);
|
|
|
|
return sprintf(data, "%u\n", dimm->ue_count);
|
|
}
|
|
|
|
/* dimm/rank attribute files */
|
|
static DEVICE_ATTR(dimm_label, S_IRUGO | S_IWUSR,
|
|
dimmdev_label_show, dimmdev_label_store);
|
|
static DEVICE_ATTR(dimm_location, S_IRUGO, dimmdev_location_show, NULL);
|
|
static DEVICE_ATTR(size, S_IRUGO, dimmdev_size_show, NULL);
|
|
static DEVICE_ATTR(dimm_mem_type, S_IRUGO, dimmdev_mem_type_show, NULL);
|
|
static DEVICE_ATTR(dimm_dev_type, S_IRUGO, dimmdev_dev_type_show, NULL);
|
|
static DEVICE_ATTR(dimm_edac_mode, S_IRUGO, dimmdev_edac_mode_show, NULL);
|
|
static DEVICE_ATTR(dimm_ce_count, S_IRUGO, dimmdev_ce_count_show, NULL);
|
|
static DEVICE_ATTR(dimm_ue_count, S_IRUGO, dimmdev_ue_count_show, NULL);
|
|
|
|
/* attributes of the dimm<id>/rank<id> object */
|
|
static struct attribute *dimm_attrs[] = {
|
|
&dev_attr_dimm_label.attr,
|
|
&dev_attr_dimm_location.attr,
|
|
&dev_attr_size.attr,
|
|
&dev_attr_dimm_mem_type.attr,
|
|
&dev_attr_dimm_dev_type.attr,
|
|
&dev_attr_dimm_edac_mode.attr,
|
|
&dev_attr_dimm_ce_count.attr,
|
|
&dev_attr_dimm_ue_count.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group dimm_attr_grp = {
|
|
.attrs = dimm_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *dimm_attr_groups[] = {
|
|
&dimm_attr_grp,
|
|
NULL
|
|
};
|
|
|
|
static const struct device_type dimm_attr_type = {
|
|
.groups = dimm_attr_groups,
|
|
};
|
|
|
|
static void dimm_release(struct device *dev)
|
|
{
|
|
/*
|
|
* Nothing to do, just unregister sysfs here. The mci
|
|
* device owns the data and will also release it.
|
|
*/
|
|
}
|
|
|
|
/* Create a DIMM object under specifed memory controller device */
|
|
static int edac_create_dimm_object(struct mem_ctl_info *mci,
|
|
struct dimm_info *dimm)
|
|
{
|
|
int err;
|
|
dimm->mci = mci;
|
|
|
|
dimm->dev.type = &dimm_attr_type;
|
|
dimm->dev.release = dimm_release;
|
|
device_initialize(&dimm->dev);
|
|
|
|
dimm->dev.parent = &mci->dev;
|
|
if (mci->csbased)
|
|
dev_set_name(&dimm->dev, "rank%d", dimm->idx);
|
|
else
|
|
dev_set_name(&dimm->dev, "dimm%d", dimm->idx);
|
|
dev_set_drvdata(&dimm->dev, dimm);
|
|
pm_runtime_forbid(&mci->dev);
|
|
|
|
err = device_add(&dimm->dev);
|
|
if (err) {
|
|
edac_dbg(1, "failure: create device %s\n", dev_name(&dimm->dev));
|
|
put_device(&dimm->dev);
|
|
return err;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_EDAC_DEBUG)) {
|
|
char location[80];
|
|
|
|
edac_dimm_info_location(dimm, location, sizeof(location));
|
|
edac_dbg(0, "device %s created at location %s\n",
|
|
dev_name(&dimm->dev), location);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Memory controller device
|
|
*/
|
|
|
|
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
|
|
|
|
static ssize_t mci_reset_counters_store(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
const char *data, size_t count)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
struct dimm_info *dimm;
|
|
int row, chan;
|
|
|
|
mci->ue_mc = 0;
|
|
mci->ce_mc = 0;
|
|
mci->ue_noinfo_count = 0;
|
|
mci->ce_noinfo_count = 0;
|
|
|
|
for (row = 0; row < mci->nr_csrows; row++) {
|
|
struct csrow_info *ri = mci->csrows[row];
|
|
|
|
ri->ue_count = 0;
|
|
ri->ce_count = 0;
|
|
|
|
for (chan = 0; chan < ri->nr_channels; chan++)
|
|
ri->channels[chan]->ce_count = 0;
|
|
}
|
|
|
|
mci_for_each_dimm(mci, dimm) {
|
|
dimm->ue_count = 0;
|
|
dimm->ce_count = 0;
|
|
}
|
|
|
|
mci->start_time = jiffies;
|
|
return count;
|
|
}
|
|
|
|
/* Memory scrubbing interface:
|
|
*
|
|
* A MC driver can limit the scrubbing bandwidth based on the CPU type.
|
|
* Therefore, ->set_sdram_scrub_rate should be made to return the actual
|
|
* bandwidth that is accepted or 0 when scrubbing is to be disabled.
|
|
*
|
|
* Negative value still means that an error has occurred while setting
|
|
* the scrub rate.
|
|
*/
|
|
static ssize_t mci_sdram_scrub_rate_store(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
const char *data, size_t count)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
unsigned long bandwidth = 0;
|
|
int new_bw = 0;
|
|
|
|
if (kstrtoul(data, 10, &bandwidth) < 0)
|
|
return -EINVAL;
|
|
|
|
new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
|
|
if (new_bw < 0) {
|
|
edac_printk(KERN_WARNING, EDAC_MC,
|
|
"Error setting scrub rate to: %lu\n", bandwidth);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* ->get_sdram_scrub_rate() return value semantics same as above.
|
|
*/
|
|
static ssize_t mci_sdram_scrub_rate_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
int bandwidth = 0;
|
|
|
|
bandwidth = mci->get_sdram_scrub_rate(mci);
|
|
if (bandwidth < 0) {
|
|
edac_printk(KERN_DEBUG, EDAC_MC, "Error reading scrub rate\n");
|
|
return bandwidth;
|
|
}
|
|
|
|
return sprintf(data, "%d\n", bandwidth);
|
|
}
|
|
|
|
/* default attribute files for the MCI object */
|
|
static ssize_t mci_ue_count_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%u\n", mci->ue_mc);
|
|
}
|
|
|
|
static ssize_t mci_ce_count_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%u\n", mci->ce_mc);
|
|
}
|
|
|
|
static ssize_t mci_ce_noinfo_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%u\n", mci->ce_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_ue_noinfo_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%u\n", mci->ue_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_seconds_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
|
|
}
|
|
|
|
static ssize_t mci_ctl_name_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
|
|
return sprintf(data, "%s\n", mci->ctl_name);
|
|
}
|
|
|
|
static ssize_t mci_size_mb_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
int total_pages = 0, csrow_idx, j;
|
|
|
|
for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
|
|
struct csrow_info *csrow = mci->csrows[csrow_idx];
|
|
|
|
for (j = 0; j < csrow->nr_channels; j++) {
|
|
struct dimm_info *dimm = csrow->channels[j]->dimm;
|
|
|
|
total_pages += dimm->nr_pages;
|
|
}
|
|
}
|
|
|
|
return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
|
|
}
|
|
|
|
static ssize_t mci_max_location_show(struct device *dev,
|
|
struct device_attribute *mattr,
|
|
char *data)
|
|
{
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
int len = PAGE_SIZE;
|
|
char *p = data;
|
|
int i, n;
|
|
|
|
for (i = 0; i < mci->n_layers; i++) {
|
|
n = scnprintf(p, len, "%s %d ",
|
|
edac_layer_name[mci->layers[i].type],
|
|
mci->layers[i].size - 1);
|
|
len -= n;
|
|
if (len <= 0)
|
|
goto out;
|
|
|
|
p += n;
|
|
}
|
|
|
|
p += scnprintf(p, len, "\n");
|
|
out:
|
|
return p - data;
|
|
}
|
|
|
|
/* default Control file */
|
|
static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
|
|
|
|
/* default Attribute files */
|
|
static DEVICE_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
|
|
static DEVICE_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
|
|
static DEVICE_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
|
|
static DEVICE_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
|
|
static DEVICE_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
|
|
static DEVICE_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
|
|
static DEVICE_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
|
|
static DEVICE_ATTR(max_location, S_IRUGO, mci_max_location_show, NULL);
|
|
|
|
/* memory scrubber attribute file */
|
|
static DEVICE_ATTR(sdram_scrub_rate, 0, mci_sdram_scrub_rate_show,
|
|
mci_sdram_scrub_rate_store); /* umode set later in is_visible */
|
|
|
|
static struct attribute *mci_attrs[] = {
|
|
&dev_attr_reset_counters.attr,
|
|
&dev_attr_mc_name.attr,
|
|
&dev_attr_size_mb.attr,
|
|
&dev_attr_seconds_since_reset.attr,
|
|
&dev_attr_ue_noinfo_count.attr,
|
|
&dev_attr_ce_noinfo_count.attr,
|
|
&dev_attr_ue_count.attr,
|
|
&dev_attr_ce_count.attr,
|
|
&dev_attr_max_location.attr,
|
|
&dev_attr_sdram_scrub_rate.attr,
|
|
NULL
|
|
};
|
|
|
|
static umode_t mci_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int idx)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct mem_ctl_info *mci = to_mci(dev);
|
|
umode_t mode = 0;
|
|
|
|
if (attr != &dev_attr_sdram_scrub_rate.attr)
|
|
return attr->mode;
|
|
if (mci->get_sdram_scrub_rate)
|
|
mode |= S_IRUGO;
|
|
if (mci->set_sdram_scrub_rate)
|
|
mode |= S_IWUSR;
|
|
return mode;
|
|
}
|
|
|
|
static const struct attribute_group mci_attr_grp = {
|
|
.attrs = mci_attrs,
|
|
.is_visible = mci_attr_is_visible,
|
|
};
|
|
|
|
static const struct attribute_group *mci_attr_groups[] = {
|
|
&mci_attr_grp,
|
|
NULL
|
|
};
|
|
|
|
static const struct device_type mci_attr_type = {
|
|
.groups = mci_attr_groups,
|
|
};
|
|
|
|
/*
|
|
* Create a new Memory Controller kobject instance,
|
|
* mc<id> under the 'mc' directory
|
|
*
|
|
* Return:
|
|
* 0 Success
|
|
* !0 Failure
|
|
*/
|
|
int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
|
|
const struct attribute_group **groups)
|
|
{
|
|
struct dimm_info *dimm;
|
|
int err;
|
|
|
|
/* get the /sys/devices/system/edac subsys reference */
|
|
mci->dev.type = &mci_attr_type;
|
|
mci->dev.parent = mci_pdev;
|
|
mci->dev.groups = groups;
|
|
dev_set_name(&mci->dev, "mc%d", mci->mc_idx);
|
|
dev_set_drvdata(&mci->dev, mci);
|
|
pm_runtime_forbid(&mci->dev);
|
|
|
|
err = device_add(&mci->dev);
|
|
if (err < 0) {
|
|
edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev));
|
|
/* no put_device() here, free mci with _edac_mc_free() */
|
|
return err;
|
|
}
|
|
|
|
edac_dbg(0, "device %s created\n", dev_name(&mci->dev));
|
|
|
|
/*
|
|
* Create the dimm/rank devices
|
|
*/
|
|
mci_for_each_dimm(mci, dimm) {
|
|
/* Only expose populated DIMMs */
|
|
if (!dimm->nr_pages)
|
|
continue;
|
|
|
|
err = edac_create_dimm_object(mci, dimm);
|
|
if (err)
|
|
goto fail;
|
|
}
|
|
|
|
#ifdef CONFIG_EDAC_LEGACY_SYSFS
|
|
err = edac_create_csrow_objects(mci);
|
|
if (err < 0)
|
|
goto fail;
|
|
#endif
|
|
|
|
edac_create_debugfs_nodes(mci);
|
|
return 0;
|
|
|
|
fail:
|
|
edac_remove_sysfs_mci_device(mci);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* remove a Memory Controller instance
|
|
*/
|
|
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
|
|
{
|
|
struct dimm_info *dimm;
|
|
|
|
if (!device_is_registered(&mci->dev))
|
|
return;
|
|
|
|
edac_dbg(0, "\n");
|
|
|
|
#ifdef CONFIG_EDAC_DEBUG
|
|
edac_debugfs_remove_recursive(mci->debugfs);
|
|
#endif
|
|
#ifdef CONFIG_EDAC_LEGACY_SYSFS
|
|
edac_delete_csrow_objects(mci);
|
|
#endif
|
|
|
|
mci_for_each_dimm(mci, dimm) {
|
|
if (!device_is_registered(&dimm->dev))
|
|
continue;
|
|
edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
|
|
device_unregister(&dimm->dev);
|
|
}
|
|
|
|
/* only remove the device, but keep mci */
|
|
device_del(&mci->dev);
|
|
}
|
|
|
|
static void mc_attr_release(struct device *dev)
|
|
{
|
|
/*
|
|
* There's no container structure here, as this is just the mci
|
|
* parent device, used to create the /sys/devices/mc sysfs node.
|
|
* So, there are no attributes on it.
|
|
*/
|
|
edac_dbg(1, "device %s released\n", dev_name(dev));
|
|
kfree(dev);
|
|
}
|
|
|
|
/*
|
|
* Init/exit code for the module. Basically, creates/removes /sys/class/rc
|
|
*/
|
|
int __init edac_mc_sysfs_init(void)
|
|
{
|
|
int err;
|
|
|
|
mci_pdev = kzalloc(sizeof(*mci_pdev), GFP_KERNEL);
|
|
if (!mci_pdev)
|
|
return -ENOMEM;
|
|
|
|
mci_pdev->bus = edac_get_sysfs_subsys();
|
|
mci_pdev->release = mc_attr_release;
|
|
mci_pdev->init_name = "mc";
|
|
|
|
err = device_register(mci_pdev);
|
|
if (err < 0) {
|
|
edac_dbg(1, "failure: create device %s\n", dev_name(mci_pdev));
|
|
put_device(mci_pdev);
|
|
return err;
|
|
}
|
|
|
|
edac_dbg(0, "device %s created\n", dev_name(mci_pdev));
|
|
|
|
return 0;
|
|
}
|
|
|
|
void edac_mc_sysfs_exit(void)
|
|
{
|
|
device_unregister(mci_pdev);
|
|
}
|