cxl: update names for interleave ways conversion macros

Change names for interleave ways macros to clearly indicate which
variable is encoded and which is the actual ways value.

ways == interleave ways
eiw == encoded interleave ways

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/167027516228.3124679.11265039496968588580.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Author: davejiang

drivers/cxl/acpi.c

@@ -34,7 +34,7 @@ static int cxl_xor_calc_n(u64 hpa, struct cxl_cxims_data *cximsd, int iw,
 	}
 	/* IW: 3,6,12 add a modulo calculation to 'n' */
 	if (!is_power_of_2(iw)) {
-		if (ways_to_cxl(iw, &eiw))
+		if (ways_to_eiw(iw, &eiw))
 			return -1;
 		hpa &= GENMASK_ULL(51, eiw + ig);
 		n |= do_div(hpa, 3) << i;
@@ -161,7 +161,7 @@ static int cxl_acpi_cfmws_verify(struct device *dev,
 		return -EINVAL;
 	}
 
-	rc = cxl_to_ways(cfmws->interleave_ways, &ways);
+	rc = eiw_to_ways(cfmws->interleave_ways, &ways);
 	if (rc) {
 		dev_err(dev, "CFMWS Interleave Ways (%d) invalid\n",
 			cfmws->interleave_ways);
@@ -221,7 +221,7 @@ static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg,
 		return 0;
 	}
 
-	rc = cxl_to_ways(cfmws->interleave_ways, &ways);
+	rc = eiw_to_ways(cfmws->interleave_ways, &ways);
 	if (rc)
 		return rc;
 	rc = eig_to_granularity(cfmws->granularity, &ig);

drivers/cxl/core/hdm.c

@@ -494,7 +494,7 @@ static void cxld_set_interleave(struct cxl_decoder *cxld, u32 *ctrl)
 	 * Input validation ensures these warns never fire, but otherwise
 	 * suppress unititalized variable usage warnings.
 	 */
-	if (WARN_ONCE(ways_to_cxl(cxld->interleave_ways, &eiw),
+	if (WARN_ONCE(ways_to_eiw(cxld->interleave_ways, &eiw),
 		      "invalid interleave_ways: %d\n", cxld->interleave_ways))
 		return;
 	if (WARN_ONCE(granularity_to_eig(cxld->interleave_granularity, &eig),
@@ -741,8 +741,8 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
 		}
 		cxld->target_type = CXL_DECODER_EXPANDER;
 	}
-	rc = cxl_to_ways(FIELD_GET(CXL_HDM_DECODER0_CTRL_IW_MASK, ctrl),
-			 &cxld->interleave_ways);
+	rc = eiw_to_ways(FIELD_GET(CXL_HDM_DECODER0_CTRL_IW_MASK, ctrl),
+			  &cxld->interleave_ways);
 	if (rc) {
 		dev_warn(&port->dev,
 			 "decoder%d.%d: Invalid interleave ways (ctrl: %#x)\n",

drivers/cxl/core/region.c

@@ -324,7 +324,7 @@ static ssize_t interleave_ways_store(struct device *dev,
 	if (rc)
 		return rc;
 
-	rc = ways_to_cxl(val, &iw);
+	rc = ways_to_eiw(val, &iw);
 	if (rc)
 		return rc;
 
@@ -1036,7 +1036,7 @@ static int cxl_port_setup_targets(struct cxl_port *port,
 		return rc;
 	}
 
-	rc = ways_to_cxl(parent_iw, &peiw);
+	rc = ways_to_eiw(parent_iw, &peiw);
 	if (rc) {
 		dev_dbg(&cxlr->dev, "%s:%s: invalid parent interleave: %d\n",
 			dev_name(parent_port->uport),
@@ -1045,7 +1045,7 @@ static int cxl_port_setup_targets(struct cxl_port *port,
 	}
 
 	iw = cxl_rr->nr_targets;
-	rc = ways_to_cxl(iw, &eiw);
+	rc = ways_to_eiw(iw, &eiw);
 	if (rc) {
 		dev_dbg(&cxlr->dev, "%s:%s: invalid port interleave: %d\n",
 			dev_name(port->uport), dev_name(&port->dev), iw);

drivers/cxl/cxl.h

@@ -83,14 +83,14 @@ static inline int eig_to_granularity(u16 eig, unsigned int *granularity)
 }
 
 /* Encode defined in CXL ECN "3, 6, 12 and 16-way memory Interleaving" */
-static inline int cxl_to_ways(u8 eniw, unsigned int *val)
+static inline int eiw_to_ways(u8 eiw, unsigned int *ways)
 {
-	switch (eniw) {
+	switch (eiw) {
 	case 0 ... 4:
-		*val = 1 << eniw;
+		*ways = 1 << eiw;
 		break;
 	case 8 ... 10:
-		*val = 3 << (eniw - 8);
+		*ways = 3 << (eiw - 8);
 		break;
 	default:
 		return -EINVAL;
@@ -108,20 +108,20 @@ static inline int granularity_to_eig(int granularity, u16 *eig)
 	return 0;
 }
 
-static inline int ways_to_cxl(unsigned int ways, u8 *iw)
+static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
 {
 	if (ways > 16)
 		return -EINVAL;
 	if (is_power_of_2(ways)) {
-		*iw = ilog2(ways);
+		*eiw = ilog2(ways);
 		return 0;
 	}
 	if (ways % 3)
 		return -EINVAL;
 	ways /= 3;
 	if (!is_power_of_2(ways))
 		return -EINVAL;
-	*iw = ilog2(ways) + 8;
+	*eiw = ilog2(ways) + 8;
 	return 0;
 }