qcacmn: Rectify Spectral hexdump output

The Spectral hexdump output would have individual hexadecimal values
on each line due to a transition to the QDF framework carried out in
the past. This is difficult to understand. Rectify the hexdump output
to have sixteen hexadecimal values (and their corresponding ASCII
representation) on each line. As of now, this hexdump functionality
continues to be maintained specific to Spectral in order to allow for
Spectral specific low level annotations to be added as and when
required.

CRs-Fixed: 2502690
Change-Id: I5618e64c37db5b14ede2d91b2f2af5d0a60178c6

target_if/spectral/target_if_spectral_phyerr.c

@@ -35,30 +35,82 @@ extern int spectral_debug_level;
 
 #ifdef WLAN_CONV_SPECTRAL_ENABLE
 
+#define SPECTRAL_HEXDUMP_OCTET_PRINT_SIZE           (3)
+#define SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE        (16)
+#define SPECTRAL_HEXDUMP_EXTRA_BUFFER_PER_LINE      (16)
+
+/*
+ * Provision for the expected hexdump line size as follows:
+ *
+ * Size per octet multiplied by number of octets per line
+ * +
+ * ASCII representation which is equivalent in print size to number of octets
+ * per line
+ * +
+ * Some extra buffer
+ */
+#define SPECTRAL_HEXDUMP_LINESIZE                           \
+		((SPECTRAL_HEXDUMP_OCTET_PRINT_SIZE *       \
+		  SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE) +   \
+		 SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE +     \
+		 SPECTRAL_HEXDUMP_EXTRA_BUFFER_PER_LINE)
+
+/**
+ * target_if_spectral_hexdump() - Print hexdump of the given buffer
+ * @_buf: Pointer to buffer
+ * @_len: Length of the buffer
+ *
+ * Print the hexdump of buffer upto given length. Print upto
+ * SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE per line, followed by the ASCII
+ * representation of these octets.
+ */
 static inline void target_if_spectral_hexdump(unsigned char *_buf, int _len)
 {
 	int i, mod;
-	unsigned char ascii[17];
+	unsigned char ascii[SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE + 1];
 	unsigned char *pc = (_buf);
+	char hexdump_line[SPECTRAL_HEXDUMP_LINESIZE + 1];
+	int loc = 0;
+
+	qdf_mem_zero(hexdump_line, sizeof(hexdump_line));
 
 	for (i = 0; i < _len; i++) {
-		mod = i % 16;
+		mod = i % SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE;
+
 		if (!mod) {
-			if (i)
-				spectral_debug("  %s\n", ascii);
+			if (i) {
+				qdf_assert_always(loc < sizeof(hexdump_line));
+				loc += snprintf(&hexdump_line[loc],
+						sizeof(hexdump_line) - loc,
+						"  %s", ascii);
+				spectral_debug("%s", hexdump_line);
+				qdf_mem_zero(hexdump_line,
+					     sizeof(hexdump_line));
+				loc = 0;
+			}
 		}
-		spectral_debug(" %02x", pc[i]);
+
+		qdf_assert_always(loc < sizeof(hexdump_line));
+		loc += snprintf(&hexdump_line[loc], sizeof(hexdump_line) - loc,
+				" %02x", pc[i]);
+
 		if ((pc[i] < 0x20) || (pc[i] > 0x7e))
 			ascii[mod] = '.';
 		else
 			ascii[mod] = pc[i];
 		ascii[(mod) + 1] = '\0';
 	}
-	while ((i % 16) != 0) {
-		spectral_debug("   ");
+
+	while ((i % SPECTRAL_HEXDUMP_NUM_OCTETS_PER_LINE) != 0) {
+		qdf_assert_always(loc < sizeof(hexdump_line));
+		loc += snprintf(&hexdump_line[loc], sizeof(hexdump_line) - loc,
+				"   ");
 		i++;
 	}
-	spectral_debug("  %s\n", ascii);
+
+	qdf_assert_always(loc < sizeof(hexdump_line));
+	snprintf(&hexdump_line[loc], sizeof(hexdump_line) - loc, "  %s", ascii);
+	spectral_debug("%s", hexdump_line);
 }
 
 /**