| Message ID | 20191106093239.25517-3-rrichter@marvell.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | EDAC: Rework edac_mc and ghes drivers | expand |
Em Wed, 6 Nov 2019 09:33:04 +0000 Robert Richter <rrichter@marvell.com> escreveu: > The EDAC_DIMM_OFF() macro takes 5 arguments to get the DIMM's index. > This can be much simplified. Store the index in struct dimm_info to > avoid its calculation and remove the EDAC_DIMM_OFF() macro. The index > can be directly used. > > Another advantage is that edac_mc_alloc() could be used even if the > exact size of the layers is unknown. Only the number of DIMMs would be > needed. > > Signed-off-by: Robert Richter <rrichter@marvell.com> Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org> > --- > drivers/edac/edac_mc.c | 14 ++++------- > drivers/edac/edac_mc_sysfs.c | 20 ++++------------ > include/linux/edac.h | 45 ++++-------------------------------- > 3 files changed, 13 insertions(+), 66 deletions(-) > > diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c > index e6fd079783bd..72088d49b03b 100644 > --- a/drivers/edac/edac_mc.c > +++ b/drivers/edac/edac_mc.c > @@ -314,10 +314,10 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num, > struct dimm_info *dimm; > u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; > unsigned int pos[EDAC_MAX_LAYERS]; > - unsigned int size, tot_dimms = 1, count = 1; > + unsigned int idx, size, tot_dimms = 1, count = 1; > unsigned int tot_csrows = 1, tot_channels = 1, tot_errcount = 0; > void *pvt, *p, *ptr = NULL; > - int i, j, row, chn, n, len, off; > + int i, j, row, chn, n, len; > bool per_rank = false; > > BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0); > @@ -425,19 +425,15 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num, > memset(&pos, 0, sizeof(pos)); > row = 0; > chn = 0; > - for (i = 0; i < tot_dimms; i++) { > + for (idx = 0; idx < tot_dimms; idx++) { > 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); > if (!dimm) > goto error; > - mci->dimms[off] = dimm; > + mci->dimms[idx] = dimm; > dimm->mci = mci; > + dimm->idx = idx; > > /* > * Copy DIMM location and initialize it. > diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c > index 32d016f1ecd1..91e4c8f155af 100644 > --- a/drivers/edac/edac_mc_sysfs.c > +++ b/drivers/edac/edac_mc_sysfs.c > @@ -557,14 +557,8 @@ static ssize_t dimmdev_ce_count_show(struct device *dev, > { > struct dimm_info *dimm = to_dimm(dev); > u32 count; > - int off; > - > - off = EDAC_DIMM_OFF(dimm->mci->layers, > - dimm->mci->n_layers, > - dimm->location[0], > - dimm->location[1], > - dimm->location[2]); > - count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off]; > + > + count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][dimm->idx]; > return sprintf(data, "%u\n", count); > } > > @@ -574,14 +568,8 @@ static ssize_t dimmdev_ue_count_show(struct device *dev, > { > struct dimm_info *dimm = to_dimm(dev); > u32 count; > - int off; > - > - off = EDAC_DIMM_OFF(dimm->mci->layers, > - dimm->mci->n_layers, > - dimm->location[0], > - dimm->location[1], > - dimm->location[2]); > - count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off]; > + > + count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][dimm->idx]; > return sprintf(data, "%u\n", count); > } > > diff --git a/include/linux/edac.h b/include/linux/edac.h > index 696bfb684d92..79c5564ee314 100644 > --- a/include/linux/edac.h > +++ b/include/linux/edac.h > @@ -362,47 +362,6 @@ struct edac_mc_layer { > */ > #define EDAC_MAX_LAYERS 3 > > -/** > - * EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a pointer > - * array for the element given by [layer0,layer1,layer2] > - * position > - * > - * @layers: a struct edac_mc_layer array, describing how many elements > - * were allocated for each layer > - * @nlayers: Number of layers at the @layers array > - * @layer0: layer0 position > - * @layer1: layer1 position. Unused if n_layers < 2 > - * @layer2: layer2 position. Unused if n_layers < 3 > - * > - * For 1 layer, this macro returns "var[layer0] - var"; > - * > - * For 2 layers, this macro is similar to allocate a bi-dimensional array > - * and to return "var[layer0][layer1] - var"; > - * > - * For 3 layers, this macro is similar to allocate a tri-dimensional array > - * and to return "var[layer0][layer1][layer2] - var". > - * > - * A loop could be used here to make it more generic, but, as we only have > - * 3 layers, this is a little faster. > - * > - * By design, layers can never be 0 or more than 3. If that ever happens, > - * a NULL is returned, causing an OOPS during the memory allocation routine, > - * with would point to the developer that he's doing something wrong. > - */ > -#define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \ > - int __i; \ > - if ((nlayers) == 1) \ > - __i = layer0; \ > - else if ((nlayers) == 2) \ > - __i = (layer1) + ((layers[1]).size * (layer0)); \ > - else if ((nlayers) == 3) \ > - __i = (layer2) + ((layers[2]).size * ((layer1) + \ > - ((layers[1]).size * (layer0)))); \ > - else \ > - __i = -EINVAL; \ > - __i; \ > -}) > - > struct dimm_info { > struct device dev; > > @@ -412,6 +371,7 @@ struct dimm_info { > unsigned int location[EDAC_MAX_LAYERS]; > > struct mem_ctl_info *mci; /* the parent */ > + unsigned int idx; /* index within the parent dimm array */ > > u32 grain; /* granularity of reported error in bytes */ > enum dev_type dtype; /* memory device type */ > @@ -654,6 +614,9 @@ edac_get_dimm_by_index(struct mem_ctl_info *mci, int index) > if (index < 0 || index >= mci->tot_dimms) > return NULL; > > + if (WARN_ON_ONCE(mci->dimms[index]->idx != index)) > + return NULL; > + > return mci->dimms[index]; > } > Cheers, Mauro
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index e6fd079783bd..72088d49b03b 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -314,10 +314,10 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num, struct dimm_info *dimm; u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; unsigned int pos[EDAC_MAX_LAYERS]; - unsigned int size, tot_dimms = 1, count = 1; + unsigned int idx, size, tot_dimms = 1, count = 1; unsigned int tot_csrows = 1, tot_channels = 1, tot_errcount = 0; void *pvt, *p, *ptr = NULL; - int i, j, row, chn, n, len, off; + int i, j, row, chn, n, len; bool per_rank = false; BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0); @@ -425,19 +425,15 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num, memset(&pos, 0, sizeof(pos)); row = 0; chn = 0; - for (i = 0; i < tot_dimms; i++) { + for (idx = 0; idx < tot_dimms; idx++) { 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); if (!dimm) goto error; - mci->dimms[off] = dimm; + mci->dimms[idx] = dimm; dimm->mci = mci; + dimm->idx = idx; /* * Copy DIMM location and initialize it. diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 32d016f1ecd1..91e4c8f155af 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -557,14 +557,8 @@ static ssize_t dimmdev_ce_count_show(struct device *dev, { struct dimm_info *dimm = to_dimm(dev); u32 count; - int off; - - off = EDAC_DIMM_OFF(dimm->mci->layers, - dimm->mci->n_layers, - dimm->location[0], - dimm->location[1], - dimm->location[2]); - count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off]; + + count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][dimm->idx]; return sprintf(data, "%u\n", count); } @@ -574,14 +568,8 @@ static ssize_t dimmdev_ue_count_show(struct device *dev, { struct dimm_info *dimm = to_dimm(dev); u32 count; - int off; - - off = EDAC_DIMM_OFF(dimm->mci->layers, - dimm->mci->n_layers, - dimm->location[0], - dimm->location[1], - dimm->location[2]); - count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off]; + + count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][dimm->idx]; return sprintf(data, "%u\n", count); } diff --git a/include/linux/edac.h b/include/linux/edac.h index 696bfb684d92..79c5564ee314 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -362,47 +362,6 @@ struct edac_mc_layer { */ #define EDAC_MAX_LAYERS 3 -/** - * EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a pointer - * array for the element given by [layer0,layer1,layer2] - * position - * - * @layers: a struct edac_mc_layer array, describing how many elements - * were allocated for each layer - * @nlayers: Number of layers at the @layers array - * @layer0: layer0 position - * @layer1: layer1 position. Unused if n_layers < 2 - * @layer2: layer2 position. Unused if n_layers < 3 - * - * For 1 layer, this macro returns "var[layer0] - var"; - * - * For 2 layers, this macro is similar to allocate a bi-dimensional array - * and to return "var[layer0][layer1] - var"; - * - * For 3 layers, this macro is similar to allocate a tri-dimensional array - * and to return "var[layer0][layer1][layer2] - var". - * - * A loop could be used here to make it more generic, but, as we only have - * 3 layers, this is a little faster. - * - * By design, layers can never be 0 or more than 3. If that ever happens, - * a NULL is returned, causing an OOPS during the memory allocation routine, - * with would point to the developer that he's doing something wrong. - */ -#define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \ - int __i; \ - if ((nlayers) == 1) \ - __i = layer0; \ - else if ((nlayers) == 2) \ - __i = (layer1) + ((layers[1]).size * (layer0)); \ - else if ((nlayers) == 3) \ - __i = (layer2) + ((layers[2]).size * ((layer1) + \ - ((layers[1]).size * (layer0)))); \ - else \ - __i = -EINVAL; \ - __i; \ -}) - struct dimm_info { struct device dev; @@ -412,6 +371,7 @@ struct dimm_info { unsigned int location[EDAC_MAX_LAYERS]; struct mem_ctl_info *mci; /* the parent */ + unsigned int idx; /* index within the parent dimm array */ u32 grain; /* granularity of reported error in bytes */ enum dev_type dtype; /* memory device type */ @@ -654,6 +614,9 @@ edac_get_dimm_by_index(struct mem_ctl_info *mci, int index) if (index < 0 || index >= mci->tot_dimms) return NULL; + if (WARN_ON_ONCE(mci->dimms[index]->idx != index)) + return NULL; + return mci->dimms[index]; }
The EDAC_DIMM_OFF() macro takes 5 arguments to get the DIMM's index. This can be much simplified. Store the index in struct dimm_info to avoid its calculation and remove the EDAC_DIMM_OFF() macro. The index can be directly used. Another advantage is that edac_mc_alloc() could be used even if the exact size of the layers is unknown. Only the number of DIMMs would be needed. Signed-off-by: Robert Richter <rrichter@marvell.com> --- drivers/edac/edac_mc.c | 14 ++++------- drivers/edac/edac_mc_sysfs.c | 20 ++++------------ include/linux/edac.h | 45 ++++-------------------------------- 3 files changed, 13 insertions(+), 66 deletions(-)