1065 lines
27 KiB
C
1065 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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*/
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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 "edac_core.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 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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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, struct kernel_param *kp)
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{
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long l;
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int ret;
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if (!val)
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return -EINVAL;
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ret = strict_strtol(val, 0, &l);
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if (ret == -EINVAL || ((int)l != l))
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return -EINVAL;
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*((int *)kp->arg) = l;
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/* notify edac_mc engine to reset the poll period */
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edac_mc_reset_delay_period(l);
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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_int,
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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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/*
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* various constants for Memory Controllers
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*/
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static const char *mem_types[] = {
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[MEM_EMPTY] = "Empty",
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[MEM_RESERVED] = "Reserved",
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[MEM_UNKNOWN] = "Unknown",
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[MEM_FPM] = "FPM",
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[MEM_EDO] = "EDO",
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[MEM_BEDO] = "BEDO",
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[MEM_SDR] = "Unbuffered-SDR",
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[MEM_RDR] = "Registered-SDR",
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[MEM_DDR] = "Unbuffered-DDR",
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[MEM_RDDR] = "Registered-DDR",
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[MEM_RMBS] = "RMBS",
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[MEM_DDR2] = "Unbuffered-DDR2",
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[MEM_FB_DDR2] = "FullyBuffered-DDR2",
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[MEM_RDDR2] = "Registered-DDR2",
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[MEM_XDR] = "XDR",
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[MEM_DDR3] = "Unbuffered-DDR3",
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[MEM_RDDR3] = "Registered-DDR3"
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};
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static const char *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 *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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/* EDAC sysfs CSROW data structures and methods
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*/
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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 csrow_info *csrow, char *data,
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int private)
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{
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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 csrow_info *csrow, char *data,
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int private)
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{
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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 csrow_info *csrow, char *data,
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int private)
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{
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return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
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}
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static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data,
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int private)
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{
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return sprintf(data, "%s\n", mem_types[csrow->mtype]);
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}
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static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data,
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int private)
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{
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return sprintf(data, "%s\n", dev_types[csrow->dtype]);
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}
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static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data,
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int private)
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{
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return sprintf(data, "%s\n", edac_caps[csrow->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 csrow_info *csrow,
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char *data, int channel)
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{
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/* if field has not been initialized, there is nothing to send */
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if (!csrow->channels[channel].label[0])
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return 0;
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return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
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csrow->channels[channel].label);
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}
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static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
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const char *data,
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size_t count, int channel)
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{
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ssize_t max_size = 0;
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max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
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strncpy(csrow->channels[channel].label, data, max_size);
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csrow->channels[channel].label[max_size] = '\0';
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return max_size;
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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 csrow_info *csrow,
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char *data, int channel)
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{
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return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
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}
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/* csrow specific attribute structure */
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struct csrowdev_attribute {
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struct attribute attr;
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ssize_t(*show) (struct csrow_info *, char *, int);
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ssize_t(*store) (struct csrow_info *, const char *, size_t, int);
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int private;
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};
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#define to_csrow(k) container_of(k, struct csrow_info, kobj)
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#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
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/* Set of show/store higher level functions for default csrow attributes */
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static ssize_t csrowdev_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct csrow_info *csrow = to_csrow(kobj);
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struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
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if (csrowdev_attr->show)
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return csrowdev_attr->show(csrow,
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buffer, csrowdev_attr->private);
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return -EIO;
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}
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static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct csrow_info *csrow = to_csrow(kobj);
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struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
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if (csrowdev_attr->store)
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return csrowdev_attr->store(csrow,
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buffer,
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count, csrowdev_attr->private);
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return -EIO;
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}
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static const struct sysfs_ops csrowfs_ops = {
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.show = csrowdev_show,
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.store = csrowdev_store
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};
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#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
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static struct csrowdev_attribute attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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.private = _private, \
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};
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/* default cwrow<id>/attribute files */
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CSROWDEV_ATTR(size_mb, S_IRUGO, csrow_size_show, NULL, 0);
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CSROWDEV_ATTR(dev_type, S_IRUGO, csrow_dev_type_show, NULL, 0);
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CSROWDEV_ATTR(mem_type, S_IRUGO, csrow_mem_type_show, NULL, 0);
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CSROWDEV_ATTR(edac_mode, S_IRUGO, csrow_edac_mode_show, NULL, 0);
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CSROWDEV_ATTR(ue_count, S_IRUGO, csrow_ue_count_show, NULL, 0);
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CSROWDEV_ATTR(ce_count, S_IRUGO, csrow_ce_count_show, NULL, 0);
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/* default attributes of the CSROW<id> object */
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static struct csrowdev_attribute *default_csrow_attr[] = {
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&attr_dev_type,
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&attr_mem_type,
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&attr_edac_mode,
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&attr_size_mb,
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&attr_ue_count,
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&attr_ce_count,
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NULL,
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};
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/* possible dynamic channel DIMM Label attribute files */
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CSROWDEV_ATTR(ch0_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 0);
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CSROWDEV_ATTR(ch1_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 1);
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CSROWDEV_ATTR(ch2_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 2);
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CSROWDEV_ATTR(ch3_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 3);
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CSROWDEV_ATTR(ch4_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 4);
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CSROWDEV_ATTR(ch5_dimm_label, S_IRUGO | S_IWUSR,
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channel_dimm_label_show, channel_dimm_label_store, 5);
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/* Total possible dynamic DIMM Label attribute file table */
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static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
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&attr_ch0_dimm_label,
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&attr_ch1_dimm_label,
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&attr_ch2_dimm_label,
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&attr_ch3_dimm_label,
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&attr_ch4_dimm_label,
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&attr_ch5_dimm_label
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};
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/* possible dynamic channel ce_count attribute files */
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CSROWDEV_ATTR(ch0_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 0);
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CSROWDEV_ATTR(ch1_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 1);
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CSROWDEV_ATTR(ch2_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 2);
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CSROWDEV_ATTR(ch3_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 3);
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CSROWDEV_ATTR(ch4_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 4);
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CSROWDEV_ATTR(ch5_ce_count, S_IRUGO | S_IWUSR, channel_ce_count_show, NULL, 5);
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/* Total possible dynamic ce_count attribute file table */
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static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
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&attr_ch0_ce_count,
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&attr_ch1_ce_count,
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&attr_ch2_ce_count,
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&attr_ch3_ce_count,
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&attr_ch4_ce_count,
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&attr_ch5_ce_count
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};
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#define EDAC_NR_CHANNELS 6
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/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
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static int edac_create_channel_files(struct kobject *kobj, int chan)
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{
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int err = -ENODEV;
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if (chan >= EDAC_NR_CHANNELS)
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return err;
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/* create the DIMM label attribute file */
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err = sysfs_create_file(kobj,
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(struct attribute *)
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dynamic_csrow_dimm_attr[chan]);
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if (!err) {
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/* create the CE Count attribute file */
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err = sysfs_create_file(kobj,
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(struct attribute *)
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dynamic_csrow_ce_count_attr[chan]);
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} else {
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debugf1("%s() dimm labels and ce_count files created",
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__func__);
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}
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return err;
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}
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/* No memory to release for this kobj */
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static void edac_csrow_instance_release(struct kobject *kobj)
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{
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struct mem_ctl_info *mci;
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struct csrow_info *cs;
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debugf1("%s()\n", __func__);
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cs = container_of(kobj, struct csrow_info, kobj);
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mci = cs->mci;
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kobject_put(&mci->edac_mci_kobj);
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}
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/* the kobj_type instance for a CSROW */
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static struct kobj_type ktype_csrow = {
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.release = edac_csrow_instance_release,
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.sysfs_ops = &csrowfs_ops,
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.default_attrs = (struct attribute **)default_csrow_attr,
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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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struct kobject *kobj_mci = &mci->edac_mci_kobj;
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struct kobject *kobj;
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int chan;
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int err;
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/* generate ..../edac/mc/mc<id>/csrow<index> */
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memset(&csrow->kobj, 0, sizeof(csrow->kobj));
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csrow->mci = mci; /* include container up link */
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/* bump the mci instance's kobject's ref count */
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kobj = kobject_get(&mci->edac_mci_kobj);
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if (!kobj) {
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err = -ENODEV;
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goto err_out;
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}
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|
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/* Instanstiate the csrow object */
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err = kobject_init_and_add(&csrow->kobj, &ktype_csrow, kobj_mci,
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"csrow%d", index);
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if (err)
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goto err_release_top_kobj;
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/* At this point, to release a csrow kobj, one must
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* call the kobject_put and allow that tear down
|
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* to work the releasing
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*/
|
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|
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/* Create the dyanmic attribute files on this csrow,
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* namely, the DIMM labels and the channel ce_count
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*/
|
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for (chan = 0; chan < csrow->nr_channels; chan++) {
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err = edac_create_channel_files(&csrow->kobj, chan);
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if (err) {
|
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/* special case the unregister here */
|
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kobject_put(&csrow->kobj);
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goto err_out;
|
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}
|
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}
|
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kobject_uevent(&csrow->kobj, KOBJ_ADD);
|
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return 0;
|
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|
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/* error unwind stack */
|
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err_release_top_kobj:
|
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kobject_put(&mci->edac_mci_kobj);
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|
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err_out:
|
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return err;
|
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}
|
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|
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/* default sysfs methods and data structures for the main MCI kobject */
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|
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static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
|
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const char *data, size_t count)
|
|
{
|
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int row, chan;
|
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|
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mci->ue_noinfo_count = 0;
|
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mci->ce_noinfo_count = 0;
|
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mci->ue_count = 0;
|
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mci->ce_count = 0;
|
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|
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for (row = 0; row < mci->nr_csrows; row++) {
|
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struct csrow_info *ri = &mci->csrows[row];
|
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|
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ri->ue_count = 0;
|
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ri->ce_count = 0;
|
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|
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for (chan = 0; chan < ri->nr_channels; chan++)
|
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ri->channels[chan].ce_count = 0;
|
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}
|
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|
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mci->start_time = jiffies;
|
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return count;
|
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}
|
|
|
|
/* Memory scrubbing interface:
|
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*
|
|
* 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
|
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* bandwidth that is accepted or 0 when scrubbing is to be disabled.
|
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*
|
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* Negative value still means that an error has occurred while setting
|
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* the scrub rate.
|
|
*/
|
|
static ssize_t mci_sdram_scrub_rate_store(struct mem_ctl_info *mci,
|
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const char *data, size_t count)
|
|
{
|
|
unsigned long bandwidth = 0;
|
|
int new_bw = 0;
|
|
|
|
if (!mci->set_sdram_scrub_rate)
|
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return -EINVAL;
|
|
|
|
if (strict_strtoul(data, 10, &bandwidth) < 0)
|
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return -EINVAL;
|
|
|
|
new_bw = mci->set_sdram_scrub_rate(mci, bandwidth);
|
|
if (new_bw < 0) {
|
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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 mem_ctl_info *mci, char *data)
|
|
{
|
|
int bandwidth = 0;
|
|
|
|
if (!mci->get_sdram_scrub_rate)
|
|
return -EINVAL;
|
|
|
|
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 mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%d\n", mci->ue_count);
|
|
}
|
|
|
|
static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%d\n", mci->ce_count);
|
|
}
|
|
|
|
static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%d\n", mci->ce_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%d\n", mci->ue_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%ld\n", (jiffies - mci->start_time) / HZ);
|
|
}
|
|
|
|
static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data, "%s\n", mci->ctl_name);
|
|
}
|
|
|
|
static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
int total_pages, csrow_idx;
|
|
|
|
for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
|
|
csrow_idx++) {
|
|
struct csrow_info *csrow = &mci->csrows[csrow_idx];
|
|
|
|
if (!csrow->nr_pages)
|
|
continue;
|
|
|
|
total_pages += csrow->nr_pages;
|
|
}
|
|
|
|
return sprintf(data, "%u\n", PAGES_TO_MiB(total_pages));
|
|
}
|
|
|
|
#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
|
|
#define to_mcidev_attr(a) container_of(a,struct mcidev_sysfs_attribute,attr)
|
|
|
|
/* MCI show/store functions for top most object */
|
|
static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
|
|
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
|
|
|
|
if (mcidev_attr->show)
|
|
return mcidev_attr->show(mem_ctl_info, buffer);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
|
|
const char *buffer, size_t count)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
|
|
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
|
|
|
|
if (mcidev_attr->store)
|
|
return mcidev_attr->store(mem_ctl_info, buffer, count);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
/* Intermediate show/store table */
|
|
static const struct sysfs_ops mci_ops = {
|
|
.show = mcidev_show,
|
|
.store = mcidev_store
|
|
};
|
|
|
|
#define MCIDEV_ATTR(_name,_mode,_show,_store) \
|
|
static struct mcidev_sysfs_attribute mci_attr_##_name = { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
};
|
|
|
|
/* default Control file */
|
|
MCIDEV_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
|
|
|
|
/* default Attribute files */
|
|
MCIDEV_ATTR(mc_name, S_IRUGO, mci_ctl_name_show, NULL);
|
|
MCIDEV_ATTR(size_mb, S_IRUGO, mci_size_mb_show, NULL);
|
|
MCIDEV_ATTR(seconds_since_reset, S_IRUGO, mci_seconds_show, NULL);
|
|
MCIDEV_ATTR(ue_noinfo_count, S_IRUGO, mci_ue_noinfo_show, NULL);
|
|
MCIDEV_ATTR(ce_noinfo_count, S_IRUGO, mci_ce_noinfo_show, NULL);
|
|
MCIDEV_ATTR(ue_count, S_IRUGO, mci_ue_count_show, NULL);
|
|
MCIDEV_ATTR(ce_count, S_IRUGO, mci_ce_count_show, NULL);
|
|
|
|
/* memory scrubber attribute file */
|
|
MCIDEV_ATTR(sdram_scrub_rate, S_IRUGO | S_IWUSR, mci_sdram_scrub_rate_show,
|
|
mci_sdram_scrub_rate_store);
|
|
|
|
static struct mcidev_sysfs_attribute *mci_attr[] = {
|
|
&mci_attr_reset_counters,
|
|
&mci_attr_mc_name,
|
|
&mci_attr_size_mb,
|
|
&mci_attr_seconds_since_reset,
|
|
&mci_attr_ue_noinfo_count,
|
|
&mci_attr_ce_noinfo_count,
|
|
&mci_attr_ue_count,
|
|
&mci_attr_ce_count,
|
|
&mci_attr_sdram_scrub_rate,
|
|
NULL
|
|
};
|
|
|
|
|
|
/*
|
|
* Release of a MC controlling instance
|
|
*
|
|
* each MC control instance has the following resources upon entry:
|
|
* a) a ref count on the top memctl kobj
|
|
* b) a ref count on this module
|
|
*
|
|
* this function must decrement those ref counts and then
|
|
* issue a free on the instance's memory
|
|
*/
|
|
static void edac_mci_control_release(struct kobject *kobj)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
|
|
mci = to_mci(kobj);
|
|
|
|
debugf0("%s() mci instance idx=%d releasing\n", __func__, mci->mc_idx);
|
|
|
|
/* decrement the module ref count */
|
|
module_put(mci->owner);
|
|
}
|
|
|
|
static struct kobj_type ktype_mci = {
|
|
.release = edac_mci_control_release,
|
|
.sysfs_ops = &mci_ops,
|
|
.default_attrs = (struct attribute **)mci_attr,
|
|
};
|
|
|
|
/* EDAC memory controller sysfs kset:
|
|
* /sys/devices/system/edac/mc
|
|
*/
|
|
static struct kset *mc_kset;
|
|
|
|
/*
|
|
* edac_mc_register_sysfs_main_kobj
|
|
*
|
|
* setups and registers the main kobject for each mci
|
|
*/
|
|
int edac_mc_register_sysfs_main_kobj(struct mem_ctl_info *mci)
|
|
{
|
|
struct kobject *kobj_mci;
|
|
int err;
|
|
|
|
debugf1("%s()\n", __func__);
|
|
|
|
kobj_mci = &mci->edac_mci_kobj;
|
|
|
|
/* Init the mci's kobject */
|
|
memset(kobj_mci, 0, sizeof(*kobj_mci));
|
|
|
|
/* Record which module 'owns' this control structure
|
|
* and bump the ref count of the module
|
|
*/
|
|
mci->owner = THIS_MODULE;
|
|
|
|
/* bump ref count on this module */
|
|
if (!try_module_get(mci->owner)) {
|
|
err = -ENODEV;
|
|
goto fail_out;
|
|
}
|
|
|
|
/* this instance become part of the mc_kset */
|
|
kobj_mci->kset = mc_kset;
|
|
|
|
/* register the mc<id> kobject to the mc_kset */
|
|
err = kobject_init_and_add(kobj_mci, &ktype_mci, NULL,
|
|
"mc%d", mci->mc_idx);
|
|
if (err) {
|
|
debugf1("%s()Failed to register '.../edac/mc%d'\n",
|
|
__func__, mci->mc_idx);
|
|
goto kobj_reg_fail;
|
|
}
|
|
kobject_uevent(kobj_mci, KOBJ_ADD);
|
|
|
|
/* At this point, to 'free' the control struct,
|
|
* edac_mc_unregister_sysfs_main_kobj() must be used
|
|
*/
|
|
|
|
debugf1("%s() Registered '.../edac/mc%d' kobject\n",
|
|
__func__, mci->mc_idx);
|
|
|
|
return 0;
|
|
|
|
/* Error exit stack */
|
|
|
|
kobj_reg_fail:
|
|
module_put(mci->owner);
|
|
|
|
fail_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_mc_register_sysfs_main_kobj
|
|
*
|
|
* tears down and the main mci kobject from the mc_kset
|
|
*/
|
|
void edac_mc_unregister_sysfs_main_kobj(struct mem_ctl_info *mci)
|
|
{
|
|
debugf1("%s()\n", __func__);
|
|
|
|
/* delete the kobj from the mc_kset */
|
|
kobject_put(&mci->edac_mci_kobj);
|
|
}
|
|
|
|
#define EDAC_DEVICE_SYMLINK "device"
|
|
|
|
#define grp_to_mci(k) (container_of(k, struct mcidev_sysfs_group_kobj, kobj)->mci)
|
|
|
|
/* MCI show/store functions for top most object */
|
|
static ssize_t inst_grp_show(struct kobject *kobj, struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
|
|
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
|
|
|
|
if (mcidev_attr->show)
|
|
return mcidev_attr->show(mem_ctl_info, buffer);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
static ssize_t inst_grp_store(struct kobject *kobj, struct attribute *attr,
|
|
const char *buffer, size_t count)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = grp_to_mci(kobj);
|
|
struct mcidev_sysfs_attribute *mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
debugf1("%s() mem_ctl_info %p\n", __func__, mem_ctl_info);
|
|
|
|
if (mcidev_attr->store)
|
|
return mcidev_attr->store(mem_ctl_info, buffer, count);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
/* No memory to release for this kobj */
|
|
static void edac_inst_grp_release(struct kobject *kobj)
|
|
{
|
|
struct mcidev_sysfs_group_kobj *grp;
|
|
struct mem_ctl_info *mci;
|
|
|
|
debugf1("%s()\n", __func__);
|
|
|
|
grp = container_of(kobj, struct mcidev_sysfs_group_kobj, kobj);
|
|
mci = grp->mci;
|
|
}
|
|
|
|
/* Intermediate show/store table */
|
|
static struct sysfs_ops inst_grp_ops = {
|
|
.show = inst_grp_show,
|
|
.store = inst_grp_store
|
|
};
|
|
|
|
/* the kobj_type instance for a instance group */
|
|
static struct kobj_type ktype_inst_grp = {
|
|
.release = edac_inst_grp_release,
|
|
.sysfs_ops = &inst_grp_ops,
|
|
};
|
|
|
|
|
|
/*
|
|
* edac_create_mci_instance_attributes
|
|
* create MC driver specific attributes bellow an specified kobj
|
|
* This routine calls itself recursively, in order to create an entire
|
|
* object tree.
|
|
*/
|
|
static int edac_create_mci_instance_attributes(struct mem_ctl_info *mci,
|
|
const struct mcidev_sysfs_attribute *sysfs_attrib,
|
|
struct kobject *kobj)
|
|
{
|
|
int err;
|
|
|
|
debugf4("%s()\n", __func__);
|
|
|
|
while (sysfs_attrib) {
|
|
debugf4("%s() sysfs_attrib = %p\n",__func__, sysfs_attrib);
|
|
if (sysfs_attrib->grp) {
|
|
struct mcidev_sysfs_group_kobj *grp_kobj;
|
|
|
|
grp_kobj = kzalloc(sizeof(*grp_kobj), GFP_KERNEL);
|
|
if (!grp_kobj)
|
|
return -ENOMEM;
|
|
|
|
grp_kobj->grp = sysfs_attrib->grp;
|
|
grp_kobj->mci = mci;
|
|
list_add_tail(&grp_kobj->list, &mci->grp_kobj_list);
|
|
|
|
debugf0("%s() grp %s, mci %p\n", __func__,
|
|
sysfs_attrib->grp->name, mci);
|
|
|
|
err = kobject_init_and_add(&grp_kobj->kobj,
|
|
&ktype_inst_grp,
|
|
&mci->edac_mci_kobj,
|
|
sysfs_attrib->grp->name);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "kobject_init_and_add failed: %d\n", err);
|
|
return err;
|
|
}
|
|
err = edac_create_mci_instance_attributes(mci,
|
|
grp_kobj->grp->mcidev_attr,
|
|
&grp_kobj->kobj);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
} else if (sysfs_attrib->attr.name) {
|
|
debugf4("%s() file %s\n", __func__,
|
|
sysfs_attrib->attr.name);
|
|
|
|
err = sysfs_create_file(kobj, &sysfs_attrib->attr);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "sysfs_create_file failed: %d\n", err);
|
|
return err;
|
|
}
|
|
} else
|
|
break;
|
|
|
|
sysfs_attrib++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_remove_mci_instance_attributes
|
|
* remove MC driver specific attributes at the topmost level
|
|
* directory of this mci instance.
|
|
*/
|
|
static void edac_remove_mci_instance_attributes(struct mem_ctl_info *mci,
|
|
const struct mcidev_sysfs_attribute *sysfs_attrib,
|
|
struct kobject *kobj, int count)
|
|
{
|
|
struct mcidev_sysfs_group_kobj *grp_kobj, *tmp;
|
|
|
|
debugf1("%s()\n", __func__);
|
|
|
|
/*
|
|
* loop if there are attributes and until we hit a NULL entry
|
|
* Remove first all the attributes
|
|
*/
|
|
while (sysfs_attrib) {
|
|
debugf4("%s() sysfs_attrib = %p\n",__func__, sysfs_attrib);
|
|
if (sysfs_attrib->grp) {
|
|
debugf4("%s() seeking for group %s\n",
|
|
__func__, sysfs_attrib->grp->name);
|
|
list_for_each_entry(grp_kobj,
|
|
&mci->grp_kobj_list, list) {
|
|
debugf4("%s() grp_kobj->grp = %p\n",__func__, grp_kobj->grp);
|
|
if (grp_kobj->grp == sysfs_attrib->grp) {
|
|
edac_remove_mci_instance_attributes(mci,
|
|
grp_kobj->grp->mcidev_attr,
|
|
&grp_kobj->kobj, count + 1);
|
|
debugf4("%s() group %s\n", __func__,
|
|
sysfs_attrib->grp->name);
|
|
kobject_put(&grp_kobj->kobj);
|
|
}
|
|
}
|
|
debugf4("%s() end of seeking for group %s\n",
|
|
__func__, sysfs_attrib->grp->name);
|
|
} else if (sysfs_attrib->attr.name) {
|
|
debugf4("%s() file %s\n", __func__,
|
|
sysfs_attrib->attr.name);
|
|
sysfs_remove_file(kobj, &sysfs_attrib->attr);
|
|
} else
|
|
break;
|
|
sysfs_attrib++;
|
|
}
|
|
|
|
/* Remove the group objects */
|
|
if (count)
|
|
return;
|
|
list_for_each_entry_safe(grp_kobj, tmp,
|
|
&mci->grp_kobj_list, list) {
|
|
list_del(&grp_kobj->list);
|
|
kfree(grp_kobj);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
int i;
|
|
int err;
|
|
struct csrow_info *csrow;
|
|
struct kobject *kobj_mci = &mci->edac_mci_kobj;
|
|
|
|
debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
|
|
|
|
INIT_LIST_HEAD(&mci->grp_kobj_list);
|
|
|
|
/* create a symlink for the device */
|
|
err = sysfs_create_link(kobj_mci, &mci->dev->kobj,
|
|
EDAC_DEVICE_SYMLINK);
|
|
if (err) {
|
|
debugf1("%s() failure to create symlink\n", __func__);
|
|
goto fail0;
|
|
}
|
|
|
|
/* If the low level driver desires some attributes,
|
|
* then create them now for the driver.
|
|
*/
|
|
if (mci->mc_driver_sysfs_attributes) {
|
|
err = edac_create_mci_instance_attributes(mci,
|
|
mci->mc_driver_sysfs_attributes,
|
|
&mci->edac_mci_kobj);
|
|
if (err) {
|
|
debugf1("%s() failure to create mci attributes\n",
|
|
__func__);
|
|
goto fail0;
|
|
}
|
|
}
|
|
|
|
/* Make directories for each CSROW object under the mc<id> kobject
|
|
*/
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
csrow = &mci->csrows[i];
|
|
|
|
/* Only expose populated CSROWs */
|
|
if (csrow->nr_pages > 0) {
|
|
err = edac_create_csrow_object(mci, csrow, i);
|
|
if (err) {
|
|
debugf1("%s() failure: create csrow %d obj\n",
|
|
__func__, i);
|
|
goto fail1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* CSROW error: backout what has already been registered, */
|
|
fail1:
|
|
for (i--; i >= 0; i--) {
|
|
if (csrow->nr_pages > 0) {
|
|
kobject_put(&mci->csrows[i].kobj);
|
|
}
|
|
}
|
|
|
|
/* remove the mci instance's attributes, if any */
|
|
edac_remove_mci_instance_attributes(mci,
|
|
mci->mc_driver_sysfs_attributes, &mci->edac_mci_kobj, 0);
|
|
|
|
/* remove the symlink */
|
|
sysfs_remove_link(kobj_mci, EDAC_DEVICE_SYMLINK);
|
|
|
|
fail0:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* remove a Memory Controller instance
|
|
*/
|
|
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
|
|
{
|
|
int i;
|
|
|
|
debugf0("%s()\n", __func__);
|
|
|
|
/* remove all csrow kobjects */
|
|
debugf4("%s() unregister this mci kobj\n", __func__);
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
if (mci->csrows[i].nr_pages > 0) {
|
|
debugf0("%s() unreg csrow-%d\n", __func__, i);
|
|
kobject_put(&mci->csrows[i].kobj);
|
|
}
|
|
}
|
|
|
|
/* remove this mci instance's attribtes */
|
|
if (mci->mc_driver_sysfs_attributes) {
|
|
debugf4("%s() unregister mci private attributes\n", __func__);
|
|
edac_remove_mci_instance_attributes(mci,
|
|
mci->mc_driver_sysfs_attributes,
|
|
&mci->edac_mci_kobj, 0);
|
|
}
|
|
|
|
/* remove the symlink */
|
|
debugf4("%s() remove_link\n", __func__);
|
|
sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
|
|
|
|
/* unregister this instance's kobject */
|
|
debugf4("%s() remove_mci_instance\n", __func__);
|
|
kobject_put(&mci->edac_mci_kobj);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* edac_setup_sysfs_mc_kset(void)
|
|
*
|
|
* Initialize the mc_kset for the 'mc' entry
|
|
* This requires creating the top 'mc' directory with a kset
|
|
* and its controls/attributes.
|
|
*
|
|
* To this 'mc' kset, instance 'mci' will be grouped as children.
|
|
*
|
|
* Return: 0 SUCCESS
|
|
* !0 FAILURE error code
|
|
*/
|
|
int edac_sysfs_setup_mc_kset(void)
|
|
{
|
|
int err = -EINVAL;
|
|
struct bus_type *edac_subsys;
|
|
|
|
debugf1("%s()\n", __func__);
|
|
|
|
/* get the /sys/devices/system/edac subsys reference */
|
|
edac_subsys = edac_get_sysfs_subsys();
|
|
if (edac_subsys == NULL) {
|
|
debugf1("%s() no edac_subsys error=%d\n", __func__, err);
|
|
goto fail_out;
|
|
}
|
|
|
|
/* Init the MC's kobject */
|
|
mc_kset = kset_create_and_add("mc", NULL, &edac_subsys->dev_root->kobj);
|
|
if (!mc_kset) {
|
|
err = -ENOMEM;
|
|
debugf1("%s() Failed to register '.../edac/mc'\n", __func__);
|
|
goto fail_kset;
|
|
}
|
|
|
|
debugf1("%s() Registered '.../edac/mc' kobject\n", __func__);
|
|
|
|
return 0;
|
|
|
|
fail_kset:
|
|
edac_put_sysfs_subsys();
|
|
|
|
fail_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* edac_sysfs_teardown_mc_kset
|
|
*
|
|
* deconstruct the mc_ket for memory controllers
|
|
*/
|
|
void edac_sysfs_teardown_mc_kset(void)
|
|
{
|
|
kset_unregister(mc_kset);
|
|
edac_put_sysfs_subsys();
|
|
}
|
|
|