[PATCH ethtool-next 1/5] module-common: Add module_dump_eeprom_page_hex() helper

[Danielle Ratson <danieller@nvidia.com>]

Add module_dump_eeprom_page_hex() to module-common.c as the shared
building block for per-type EEPROM page hex dump functions.

It prints a per-page header (page number and optional bank) followed by
a hex dump in the established ethtool format, using dump_hex().

Assisted-by: Claude:claude-sonnet-4.6
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Danielle Ratson <danieller@nvidia.com>
---
 module-common.c | 16 ++++++++++++++++
 module-common.h |  3 +++
 2 files changed, 19 insertions(+)

diff --git a/module-common.c b/module-common.c
index 4e9a0a7..17e4845 100644
--- a/module-common.c
+++ b/module-common.c
@@ -7,6 +7,7 @@
 #include <math.h>
 #include <ctype.h>
 #include "module-common.h"
+#include "internal.h"
 
 const struct module_aw_mod module_aw_mod_flags[] = {
 	{ MODULE_TYPE_CMIS, "Module temperature high alarm",
@@ -656,3 +657,18 @@ void module_show_dom_mod_lvl_monitors(const struct sff_diags *sd)
 	PRINT_VCC_ALL("Module voltage", "module_voltage_measurement",
 		      sd->sfp_voltage[MCURR]);
 }
+
+/* Print one EEPROM page with a descriptive header followed by hex dump.
+ * When bank is non-zero it is included in the header.
+ */
+void module_dump_eeprom_page_hex(const u8 *data, u8 bank, u8 page,
+				 u32 offset, u32 length)
+{
+	if (bank)
+		printf("Bank: 0x%x, Page: 0x%x\n\n", bank, page);
+	else
+		printf("Page: 0x%x\n\n", page);
+
+	dump_hex(stdout, data, length, offset);
+	printf("\n");
+}
diff --git a/module-common.h b/module-common.h
index 985b518..94a3a8e 100644
--- a/module-common.h
+++ b/module-common.h
@@ -284,4 +284,7 @@ void module_show_connector(const __u8 *id, int ctor_offset);
 void module_show_mit_compliance(u16 value);
 void module_show_dom_mod_lvl_monitors(const struct sff_diags *sd);
 
+void module_dump_eeprom_page_hex(const u8 *data, u8 bank, u8 page,
+				 u32 offset, u32 length);
+
 #endif /* MODULE_COMMON_H__ */
-- 
2.51.0