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![Eric Badger](/assets/img/avatar_default.png)
This is cosmetically nicer for counts > INT32_MAX, and aligns the MC-scope format with that of the lower layer sysfs counter files. Signed-off-by: Eric Badger <ebadger@purestorage.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20211003181653.GA685515@ebadger-ThinkPad-T590
1031 lines
26 KiB
C
1031 lines
26 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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/* 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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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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/* 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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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);
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csrow->dev.parent = &mci->dev;
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csrow->mci = mci;
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dev_set_name(&csrow->dev, "csrow%d", index);
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dev_set_drvdata(&csrow->dev, csrow);
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err = device_add(&csrow->dev);
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if (err) {
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edac_dbg(1, "failure: create device %s\n", dev_name(&csrow->dev));
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put_device(&csrow->dev);
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return err;
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}
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edac_dbg(0, "device %s created\n", dev_name(&csrow->dev));
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return 0;
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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_objects(struct mem_ctl_info *mci)
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{
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int err, i;
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struct csrow_info *csrow;
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for (i = 0; i < mci->nr_csrows; i++) {
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csrow = mci->csrows[i];
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if (!nr_pages_per_csrow(csrow))
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continue;
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err = edac_create_csrow_object(mci, mci->csrows[i], i);
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if (err < 0)
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goto error;
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}
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return 0;
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error:
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for (--i; i >= 0; i--) {
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if (device_is_registered(&mci->csrows[i]->dev))
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device_unregister(&mci->csrows[i]->dev);
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}
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return err;
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}
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static void edac_delete_csrow_objects(struct mem_ctl_info *mci)
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{
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int i;
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for (i = 0; i < mci->nr_csrows; i++) {
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if (device_is_registered(&mci->csrows[i]->dev))
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device_unregister(&mci->csrows[i]->dev);
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|
}
|
|
}
|
|
|
|
#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);
|
|
}
|