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From: Robert Richter <rrichter@marvell.com>
To: Borislav Petkov <bp@alien8.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Tony Luck <tony.luck@intel.com>, Jason Baron <jbaron@akamai.com>,
	Tero Kristo <t-kristo@ti.com>
Cc: James Morse <james.morse@arm.com>,
	Robert Richter <rrichter@marvell.com>,
	"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Subject: [PATCH v2 01/20] EDAC: Replace EDAC_DIMM_PTR() macro with edac_get_dimm() function
Date: Wed, 6 Nov 2019 09:33:02 +0000
Message-ID: <20191106093239.25517-2-rrichter@marvell.com> (raw)
In-Reply-To: <20191106093239.25517-1-rrichter@marvell.com>

The EDAC_DIMM_PTR() macro takes 3 arguments from struct mem_ctl_info.
Clean up this interface to only pass the mci struct and replace this
macro with the new function edac_get_dimm().

Also introduce the edac_get_dimm_by_index() function for later use.
This allows it to get a dimm pointer only by a given index. This can
be useful if the dimm's position within the layers of the memory
controller or the exact size of the layers are unknown.

Small style changes made for some hunks after applying the semantic
patch.

Semantic patch used:

@@ expression mci, a, b,c; @@

-EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, a, b, c)
+edac_get_dimm(mci, a, b, c)

Signed-off-by: Robert Richter <rrichter@marvell.com>
---
 drivers/edac/ghes_edac.c    |  7 +--
 drivers/edac/i10nm_base.c   |  3 +-
 drivers/edac/i3200_edac.c   |  3 +-
 drivers/edac/i5000_edac.c   |  5 +--
 drivers/edac/i5100_edac.c   |  3 +-
 drivers/edac/i5400_edac.c   |  3 +-
 drivers/edac/i7300_edac.c   |  3 +-
 drivers/edac/i7core_edac.c  |  3 +-
 drivers/edac/ie31200_edac.c |  7 +--
 drivers/edac/pnd2_edac.c    |  4 +-
 drivers/edac/sb_edac.c      |  2 +-
 drivers/edac/skx_base.c     |  3 +-
 drivers/edac/ti_edac.c      |  2 +-
 include/linux/edac.h        | 88 ++++++++++++++++++++++++-------------
 14 files changed, 74 insertions(+), 62 deletions(-)

diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 5da85ef7966d..d92cd99081d2 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -106,9 +106,7 @@ static void ghes_edac_dmidecode(const struct dmi_header *dh, void *arg)
 
 	if (dh->type == DMI_ENTRY_MEM_DEVICE) {
 		struct memdev_dmi_entry *entry = (struct memdev_dmi_entry *)dh;
-		struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-						       mci->n_layers,
-						       dimm_fill->count, 0, 0);
+		struct dimm_info *dimm = edac_get_dimm(mci, dimm_fill->count, 0, 0);
 		u16 rdr_mask = BIT(7) | BIT(13);
 
 		if (entry->size == 0xffff) {
@@ -543,8 +541,7 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
 		dimm_fill.mci = mci;
 		dmi_walk(ghes_edac_dmidecode, &dimm_fill);
 	} else {
-		struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-						       mci->n_layers, 0, 0, 0);
+		struct dimm_info *dimm = edac_get_dimm(mci, 0, 0, 0);
 
 		dimm->nr_pages = 1;
 		dimm->grain = 128;
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
index c370d5457e6b..059eccf0582b 100644
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -154,8 +154,7 @@ static int i10nm_get_dimm_config(struct mem_ctl_info *mci)
 
 		ndimms = 0;
 		for (j = 0; j < I10NM_NUM_DIMMS; j++) {
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-					     mci->n_layers, i, j, 0);
+			dimm = edac_get_dimm(mci, i, j, 0);
 			mtr = I10NM_GET_DIMMMTR(imc, i, j);
 			mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i, j);
 			edac_dbg(1, "dimmmtr 0x%x mcddrtcfg 0x%x (mc%d ch%d dimm%d)\n",
diff --git a/drivers/edac/i3200_edac.c b/drivers/edac/i3200_edac.c
index 299b441647cd..432b375a4075 100644
--- a/drivers/edac/i3200_edac.c
+++ b/drivers/edac/i3200_edac.c
@@ -392,8 +392,7 @@ static int i3200_probe1(struct pci_dev *pdev, int dev_idx)
 		unsigned long nr_pages;
 
 		for (j = 0; j < nr_channels; j++) {
-			struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-							       mci->n_layers, i, j, 0);
+			struct dimm_info *dimm = edac_get_dimm(mci, i, j, 0);
 
 			nr_pages = drb_to_nr_pages(drbs, stacked, j, i);
 			if (nr_pages == 0)
diff --git a/drivers/edac/i5000_edac.c b/drivers/edac/i5000_edac.c
index 078a7351bf05..1a6f69c859ab 100644
--- a/drivers/edac/i5000_edac.c
+++ b/drivers/edac/i5000_edac.c
@@ -1275,9 +1275,8 @@ static int i5000_init_csrows(struct mem_ctl_info *mci)
 			if (!MTR_DIMMS_PRESENT(mtr))
 				continue;
 
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
-				       channel / MAX_BRANCHES,
-				       channel % MAX_BRANCHES, slot);
+			dimm = edac_get_dimm(mci, channel / MAX_BRANCHES,
+					     channel % MAX_BRANCHES, slot);
 
 			csrow_megs = pvt->dimm_info[slot][channel].megabytes;
 			dimm->grain = 8;
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index 12bebecb203b..134586753311 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -858,8 +858,7 @@ static void i5100_init_csrows(struct mem_ctl_info *mci)
 		if (!npages)
 			continue;
 
-		dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
-			       chan, rank, 0);
+		dimm = edac_get_dimm(mci, chan, rank, 0);
 
 		dimm->nr_pages = npages;
 		dimm->grain = 32;
diff --git a/drivers/edac/i5400_edac.c b/drivers/edac/i5400_edac.c
index 8c86c6fd7da7..f131c05ade9f 100644
--- a/drivers/edac/i5400_edac.c
+++ b/drivers/edac/i5400_edac.c
@@ -1187,8 +1187,7 @@ static int i5400_init_dimms(struct mem_ctl_info *mci)
 			if (!MTR_DIMMS_PRESENT(mtr))
 				continue;
 
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
-				       channel / 2, channel % 2, slot);
+			dimm = edac_get_dimm(mci, channel / 2, channel % 2, slot);
 
 			size_mb =  pvt->dimm_info[slot][channel].megabytes;
 
diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index 447d357c7a67..2e9bbe56cde9 100644
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -794,8 +794,7 @@ static int i7300_init_csrows(struct mem_ctl_info *mci)
 			for (ch = 0; ch < max_channel; ch++) {
 				int channel = to_channel(ch, branch);
 
-				dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-					       mci->n_layers, branch, ch, slot);
+				dimm = edac_get_dimm(mci, branch, ch, slot);
 
 				dinfo = &pvt->dimm_info[slot][channel];
 
diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index a71cca6eeb33..b3135b208f9a 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -585,8 +585,7 @@ static int get_dimm_config(struct mem_ctl_info *mci)
 			if (!DIMM_PRESENT(dimm_dod[j]))
 				continue;
 
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
-				       i, j, 0);
+			dimm = edac_get_dimm(mci, i, j, 0);
 			banks = numbank(MC_DOD_NUMBANK(dimm_dod[j]));
 			ranks = numrank(MC_DOD_NUMRANK(dimm_dod[j]));
 			rows = numrow(MC_DOD_NUMROW(dimm_dod[j]));
diff --git a/drivers/edac/ie31200_edac.c b/drivers/edac/ie31200_edac.c
index d26300f9cb07..4f65073f230b 100644
--- a/drivers/edac/ie31200_edac.c
+++ b/drivers/edac/ie31200_edac.c
@@ -490,9 +490,7 @@ static int ie31200_probe1(struct pci_dev *pdev, int dev_idx)
 
 			if (dimm_info[j][i].dual_rank) {
 				nr_pages = nr_pages / 2;
-				dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-						     mci->n_layers, (i * 2) + 1,
-						     j, 0);
+				dimm = edac_get_dimm(mci, (i * 2) + 1, j, 0);
 				dimm->nr_pages = nr_pages;
 				edac_dbg(0, "set nr pages: 0x%lx\n", nr_pages);
 				dimm->grain = 8; /* just a guess */
@@ -503,8 +501,7 @@ static int ie31200_probe1(struct pci_dev *pdev, int dev_idx)
 				dimm->dtype = DEV_UNKNOWN;
 				dimm->edac_mode = EDAC_UNKNOWN;
 			}
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-					     mci->n_layers, i * 2, j, 0);
+			dimm = edac_get_dimm(mci, i * 2, j, 0);
 			dimm->nr_pages = nr_pages;
 			edac_dbg(0, "set nr pages: 0x%lx\n", nr_pages);
 			dimm->grain = 8; /* same guess */
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index b1193be1ef1d..933f7722b893 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -1231,7 +1231,7 @@ static void apl_get_dimm_config(struct mem_ctl_info *mci)
 		if (!(chan_mask & BIT(i)))
 			continue;
 
-		dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, i, 0, 0);
+		dimm = edac_get_dimm(mci, i, 0, 0);
 		if (!dimm) {
 			edac_dbg(0, "No allocated DIMM for channel %d\n", i);
 			continue;
@@ -1311,7 +1311,7 @@ static void dnv_get_dimm_config(struct mem_ctl_info *mci)
 			if (!ranks_of_dimm[j])
 				continue;
 
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, i, j, 0);
+			dimm = edac_get_dimm(mci, i, j, 0);
 			if (!dimm) {
 				edac_dbg(0, "No allocated DIMM for channel %d DIMM %d\n", i, j);
 				continue;
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index a2fd39d330d6..4957e8ee1879 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -1621,7 +1621,7 @@ static int __populate_dimms(struct mem_ctl_info *mci,
 		}
 
 		for (j = 0; j < max_dimms_per_channel; j++) {
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, i, j, 0);
+			dimm = edac_get_dimm(mci, i, j, 0);
 			if (pvt->info.type == KNIGHTS_LANDING) {
 				pci_read_config_dword(pvt->knl.pci_channel[i],
 					knl_mtr_reg, &mtr);
diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index a8853e724d1f..83545b4facb7 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -189,8 +189,7 @@ static int skx_get_dimm_config(struct mem_ctl_info *mci)
 		pci_read_config_dword(imc->chan[i].cdev, 0x8C, &amap);
 		pci_read_config_dword(imc->chan[i].cdev, 0x400, &mcddrtcfg);
 		for (j = 0; j < SKX_NUM_DIMMS; j++) {
-			dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
-					     mci->n_layers, i, j, 0);
+			dimm = edac_get_dimm(mci, i, j, 0);
 			pci_read_config_dword(imc->chan[i].cdev,
 					      0x80 + 4 * j, &mtr);
 			if (IS_DIMM_PRESENT(mtr)) {
diff --git a/drivers/edac/ti_edac.c b/drivers/edac/ti_edac.c
index 6ac26d1b929f..8be3e89a510e 100644
--- a/drivers/edac/ti_edac.c
+++ b/drivers/edac/ti_edac.c
@@ -135,7 +135,7 @@ static void ti_edac_setup_dimm(struct mem_ctl_info *mci, u32 type)
 	u32 val;
 	u32 memsize;
 
-	dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, 0, 0, 0);
+	dimm = edac_get_dimm(mci, 0, 0, 0);
 
 	val = ti_edac_readl(edac, EMIF_SDRAM_CONFIG);
 
diff --git a/include/linux/edac.h b/include/linux/edac.h
index c19483b90079..696bfb684d92 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -403,37 +403,6 @@ struct edac_mc_layer {
 	__i;								\
 })
 
-/**
- * EDAC_DIMM_PTR - Macro responsible to get a pointer 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
- * @var:	name of the var where we want to get the pointer
- *		(like mci->dimms)
- * @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]";
- *
- * For 2 layers, this macro is similar to allocate a bi-dimensional array
- * and to return "var[layer0][layer1]";
- *
- * For 3 layers, this macro is similar to allocate a tri-dimensional array
- * and to return "var[layer0][layer1][layer2]";
- */
-#define EDAC_DIMM_PTR(layers, var, nlayers, layer0, layer1, layer2) ({	\
-	typeof(*var) __p;						\
-	int ___i = EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2);	\
-	if (___i < 0)							\
-		__p = NULL;						\
-	else								\
-		__p = (var)[___i];					\
-	__p;								\
-})
-
 struct dimm_info {
 	struct device dev;
 
@@ -669,4 +638,61 @@ struct mem_ctl_info {
 	bool fake_inject_ue;
 	u16 fake_inject_count;
 };
+
+/**
+ * edac_get_dimm_by_index - Get DIMM info from a memory controller
+ *                          given by an index
+ *
+ * @mci:	a struct mem_ctl_info
+ * @index:	index in the memory controller's DIMM array
+ *
+ * Returns a struct dimm_info* or NULL on failure.
+ */
+static inline struct dimm_info *
+edac_get_dimm_by_index(struct mem_ctl_info *mci, int index)
+{
+	if (index < 0 || index >= mci->tot_dimms)
+		return NULL;
+
+	return mci->dimms[index];
+}
+
+/**
+ * edac_get_dimm - Get DIMM info from a memory controller given by
+ *                 [layer0,layer1,layer2] position
+ *
+ * @mci:	a struct mem_ctl_info
+ * @layer0:	layer0 position
+ * @layer1:	layer1 position. Unused if n_layers < 2
+ * @layer2:	layer2 position. Unused if n_layers < 3
+ *
+ * For 1 layer, this function returns "dimms[layer0]";
+ *
+ * For 2 layers, this function is similar to allocate a bi-dimensional
+ * array and to return "dimms[layer0][layer1]";
+ *
+ * For 3 layers, this function is similar to allocate a tri-dimensional array
+ * and to return "dimms[layer0][layer1][layer2]";
+ */
+static inline struct dimm_info *edac_get_dimm(struct mem_ctl_info *mci,
+	int layer0, int layer1, int layer2)
+{
+	int index;
+
+	if (layer0 < 0
+	    || (mci->n_layers > 1 && layer1 < 0)
+	    || (mci->n_layers > 2 && layer2 < 0))
+		return NULL;
+
+	index = layer0;
+
+	if (mci->n_layers > 1)
+		index = index * mci->layers[1].size + layer1;
+
+	if (mci->n_layers > 2)
+		index = index * mci->layers[2].size + layer2;
+
+	return edac_get_dimm_by_index(mci, index);
+}
+
 #endif
-- 
2.20.1


  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06  9:32 [PATCH v2 00/20] EDAC: Rework edac_mc and ghes drivers Robert Richter
2019-11-06  9:33 ` Robert Richter [this message]
2019-11-09  7:23   ` [PATCH v2 01/20] EDAC: Replace EDAC_DIMM_PTR() macro with edac_get_dimm() function Mauro Carvalho Chehab
2019-11-06  9:33 ` [PATCH v2 02/20] EDAC: Remove EDAC_DIMM_OFF() macro Robert Richter
2019-11-09  7:27   ` Mauro Carvalho Chehab
2019-11-06  9:33 ` [PATCH v2 03/20] EDAC: Introduce mci_for_each_dimm() iterator Robert Richter
2019-11-10 11:37   ` Borislav Petkov
2019-11-06  9:33 ` [PATCH v2 04/20] EDAC, mc: Do not BUG_ON() in edac_mc_alloc() Robert Richter
2019-11-06  9:33 ` [PATCH v2 05/20] EDAC, mc: Remove needless zero string termination Robert Richter
2019-11-09  7:28   ` Mauro Carvalho Chehab
2019-11-09 10:11   ` Borislav Petkov
2019-11-06  9:33 ` [PATCH v2 06/20] EDAC, mc: Reduce indentation level in edac_mc_handle_error() Robert Richter
2019-11-06  9:33 ` [PATCH v2 07/20] EDAC, mc: Rename iterator variable to idx Robert Richter
2019-11-09 10:21   ` Borislav Petkov
2019-11-06  9:33 ` [PATCH v2 08/20] EDAC: Remove misleading comment in struct edac_raw_error_desc Robert Richter
2019-11-06  9:33 ` [PATCH v2 09/20] EDAC, ghes: Use standard kernel macros for page calculations Robert Richter
2019-11-06  9:33 ` [PATCH v2 10/20] EDAC, ghes: Fix grain calculation Robert Richter
2019-11-06  9:33 ` [PATCH v2 11/20] EDAC, ghes: Remove intermediate buffer pvt->detail_location Robert Richter
2019-11-06  9:33 ` [PATCH v2 12/20] EDAC, ghes: Unify trace_mc_event() code with edac_mc driver Robert Richter
2019-11-06  9:33 ` [PATCH v2 13/20] EDAC, Documentation: Describe CPER module definition and DIMM ranks Robert Richter
2019-11-06  9:33 ` [PATCH v2 14/20] EDAC, mc: Remove per layer counters Robert Richter
2019-11-09  7:40   ` Mauro Carvalho Chehab
2019-11-18 20:30     ` Robert Richter
2019-11-06  9:33 ` [PATCH v2 15/20] EDAC, mc: Split edac_mc_alloc() into smaller functions Robert Richter
2019-11-06  9:33 ` [PATCH v2 16/20] EDAC, mc: Reorder functions edac_mc_alloc*() Robert Richter
2019-11-06  9:33 ` [PATCH v2 17/20] EDAC, mc: Rework edac_raw_mc_handle_error() to use struct dimm_info Robert Richter
2019-11-06  9:33 ` [PATCH v2 18/20] EDAC: Store error type in struct edac_raw_error_desc Robert Richter
2019-11-09  7:30   ` Mauro Carvalho Chehab
2019-11-06  9:33 ` [PATCH v2 19/20] EDAC, mc: Determine mci pointer from the error descriptor Robert Richter
2019-11-06  9:33 ` [PATCH v2 20/20] EDAC, mc: Create new function edac_inc_csrow() Robert Richter
2019-11-09  7:32   ` Mauro Carvalho Chehab
2019-11-10 14:51 ` [PATCH v2 00/20] EDAC: Rework edac_mc and ghes drivers Borislav Petkov
2019-11-11 15:49   ` Robert Richter

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	public-inbox-index linux-edac

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-edac


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git