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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-04-24 15:05:43 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-06-11 13:23:45 -0300 |
commit | de3910eb79ac8c0f29a11224661c0ebaaf813039 (patch) | |
tree | 44584d6691588b2c18823260be0e44f0c9872d02 /drivers/edac/edac_mc.c | |
parent | e39f4ea9b01f137f9e6fa631f3e9088fb9175e91 (diff) | |
download | blackbird-op-linux-de3910eb79ac8c0f29a11224661c0ebaaf813039.tar.gz blackbird-op-linux-de3910eb79ac8c0f29a11224661c0ebaaf813039.zip |
edac: change the mem allocation scheme to make Documentation/kobject.txt happy
Kernel kobjects have rigid rules: each container object should be
dynamically allocated, and can't be allocated into a single kmalloc.
EDAC never obeyed this rule: it has a single malloc function that
allocates all needed data into a single kzalloc.
As this is not accepted anymore, change the allocation schema of the
EDAC *_info structs to enforce this Kernel standard.
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/edac/edac_mc.c')
-rw-r--r-- | drivers/edac/edac_mc.c | 107 |
1 files changed, 70 insertions, 37 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 4a6fdc03740e..db2ba31ba2b1 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -210,15 +210,15 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, { struct mem_ctl_info *mci; struct edac_mc_layer *layer; - struct csrow_info *csi, *csr; - struct rank_info *chi, *chp, *chan; + struct csrow_info *csr; + struct rank_info *chan; struct dimm_info *dimm; u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; unsigned pos[EDAC_MAX_LAYERS]; unsigned size, tot_dimms = 1, count = 1; unsigned tot_csrows = 1, tot_channels = 1, tot_errcount = 0; void *pvt, *p, *ptr = NULL; - int i, j, row, chn, n, len; + int i, j, row, chn, n, len, off; bool per_rank = false; BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0); @@ -244,9 +244,6 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, */ mci = edac_align_ptr(&ptr, sizeof(*mci), 1); layer = edac_align_ptr(&ptr, sizeof(*layer), n_layers); - csi = edac_align_ptr(&ptr, sizeof(*csi), tot_csrows); - chi = edac_align_ptr(&ptr, sizeof(*chi), tot_csrows * tot_channels); - dimm = edac_align_ptr(&ptr, sizeof(*dimm), tot_dimms); for (i = 0; i < n_layers; i++) { count *= layers[i].size; debugf4("%s: errcount layer %d size %d\n", __func__, i, count); @@ -264,6 +261,7 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, tot_dimms, per_rank ? "ranks" : "dimms", tot_csrows * tot_channels); + mci = kzalloc(size, GFP_KERNEL); if (mci == NULL) return NULL; @@ -272,9 +270,6 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, * rather than an imaginary chunk of memory located at address 0. */ layer = (struct edac_mc_layer *)(((char *)mci) + ((unsigned long)layer)); - csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi)); - chi = (struct rank_info *)(((char *)mci) + ((unsigned long)chi)); - dimm = (struct dimm_info *)(((char *)mci) + ((unsigned long)dimm)); for (i = 0; i < n_layers; i++) { mci->ce_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ce_per_layer[i])); mci->ue_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ue_per_layer[i])); @@ -283,8 +278,6 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, /* setup index and various internal pointers */ mci->mc_idx = mc_num; - mci->csrows = csi; - mci->dimms = dimm; mci->tot_dimms = tot_dimms; mci->pvt_info = pvt; mci->n_layers = n_layers; @@ -295,39 +288,60 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, mci->mem_is_per_rank = per_rank; /* - * Fill the csrow struct + * Alocate and fill the csrow/channels structs */ + mci->csrows = kcalloc(sizeof(*mci->csrows), tot_csrows, GFP_KERNEL); + if (!mci->csrows) + goto error; for (row = 0; row < tot_csrows; row++) { - csr = &csi[row]; + csr = kzalloc(sizeof(**mci->csrows), GFP_KERNEL); + if (!csr) + goto error; + mci->csrows[row] = csr; csr->csrow_idx = row; csr->mci = mci; csr->nr_channels = tot_channels; - chp = &chi[row * tot_channels]; - csr->channels = chp; + csr->channels = kcalloc(sizeof(*csr->channels), tot_channels, + GFP_KERNEL); + if (!csr->channels) + goto error; for (chn = 0; chn < tot_channels; chn++) { - chan = &chp[chn]; + chan = kzalloc(sizeof(**csr->channels), GFP_KERNEL); + if (!chan) + goto error; + csr->channels[chn] = chan; chan->chan_idx = chn; chan->csrow = csr; } } /* - * Fill the dimm struct + * Allocate and fill the dimm structs */ + mci->dimms = kcalloc(sizeof(*mci->dimms), tot_dimms, GFP_KERNEL); + if (!mci->dimms) + goto error; + memset(&pos, 0, sizeof(pos)); row = 0; chn = 0; debugf4("%s: initializing %d %s\n", __func__, tot_dimms, per_rank ? "ranks" : "dimms"); for (i = 0; i < tot_dimms; i++) { - chan = &csi[row].channels[chn]; - dimm = EDAC_DIMM_PTR(layer, mci->dimms, n_layers, - pos[0], pos[1], pos[2]); + chan = mci->csrows[row]->channels[chn]; + off = EDAC_DIMM_OFF(layer, n_layers, pos[0], pos[1], pos[2]); + if (off < 0 || off >= tot_dimms) { + edac_mc_printk(mci, KERN_ERR, "EDAC core bug: EDAC_DIMM_OFF is trying to do an illegal data access\n"); + goto error; + } + + dimm = kzalloc(sizeof(**mci->dimms), GFP_KERNEL); + mci->dimms[off] = dimm; dimm->mci = mci; - debugf2("%s: %d: %s%zd (%d:%d:%d): row %d, chan %d\n", __func__, - i, per_rank ? "rank" : "dimm", (dimm - mci->dimms), + debugf2("%s: %d: %s%i (%d:%d:%d): row %d, chan %d\n", __func__, + i, per_rank ? "rank" : "dimm", off, pos[0], pos[1], pos[2], row, chn); /* @@ -381,6 +395,28 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num, */ return mci; + +error: + if (mci->dimms) { + for (i = 0; i < tot_dimms; i++) + kfree(mci->dimms[i]); + kfree(mci->dimms); + } + if (mci->csrows) { + for (chn = 0; chn < tot_channels; chn++) { + csr = mci->csrows[chn]; + if (csr) { + for (chn = 0; chn < tot_channels; chn++) + kfree(csr->channels[chn]); + kfree(csr); + } + kfree(mci->csrows[i]); + } + kfree(mci->csrows); + } + kfree(mci); + + return NULL; } EXPORT_SYMBOL_GPL(edac_mc_alloc); @@ -393,10 +429,8 @@ void edac_mc_free(struct mem_ctl_info *mci) { debugf1("%s()\n", __func__); + /* the mci instance is freed here, when the sysfs object is dropped */ edac_unregister_sysfs(mci); - - /* free the mci instance memory here */ - kfree(mci); } EXPORT_SYMBOL_GPL(edac_mc_free); @@ -668,13 +702,12 @@ int edac_mc_add_mc(struct mem_ctl_info *mci) for (i = 0; i < mci->nr_csrows; i++) { int j; - edac_mc_dump_csrow(&mci->csrows[i]); - for (j = 0; j < mci->csrows[i].nr_channels; j++) - edac_mc_dump_channel(&mci->csrows[i]. - channels[j]); + edac_mc_dump_csrow(mci->csrows[i]); + for (j = 0; j < mci->csrows[i]->nr_channels; j++) + edac_mc_dump_channel(mci->csrows[i]->channels[j]); } for (i = 0; i < mci->tot_dimms; i++) - edac_mc_dump_dimm(&mci->dimms[i]); + edac_mc_dump_dimm(mci->dimms[i]); } #endif mutex_lock(&mem_ctls_mutex); @@ -793,17 +826,17 @@ static void edac_mc_scrub_block(unsigned long page, unsigned long offset, /* FIXME - should return -1 */ int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) { - struct csrow_info *csrows = mci->csrows; + struct csrow_info **csrows = mci->csrows; int row, i, j, n; debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); row = -1; for (i = 0; i < mci->nr_csrows; i++) { - struct csrow_info *csrow = &csrows[i]; + struct csrow_info *csrow = csrows[i]; n = 0; for (j = 0; j < csrow->nr_channels; j++) { - struct dimm_info *dimm = csrow->channels[j].dimm; + struct dimm_info *dimm = csrow->channels[j]->dimm; n += dimm->nr_pages; } if (n == 0) @@ -1062,7 +1095,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type, p = label; *p = '\0'; for (i = 0; i < mci->tot_dimms; i++) { - struct dimm_info *dimm = &mci->dimms[i]; + struct dimm_info *dimm = mci->dimms[i]; if (top_layer >= 0 && top_layer != dimm->location[0]) continue; @@ -1120,13 +1153,13 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type, strcpy(label, "unknown memory"); if (type == HW_EVENT_ERR_CORRECTED) { if (row >= 0) { - mci->csrows[row].ce_count++; + mci->csrows[row]->ce_count++; if (chan >= 0) - mci->csrows[row].channels[chan].ce_count++; + mci->csrows[row]->channels[chan]->ce_count++; } } else if (row >= 0) - mci->csrows[row].ue_count++; + mci->csrows[row]->ue_count++; } /* Fill the RAM location data */ |