netdev - [PATCH ethtool-next 1/8] sff-8636: Use an SFF-8636 specific define for maximum number of channels

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Date:   Tue, 23 Nov 2021 19:40:55 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     mkubecek@...e.cz, popadrian1996@...il.com, andrew@...n.ch,
        mlxsw@...dia.com, moshe@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH ethtool-next 1/8] sff-8636: Use an SFF-8636 specific define for maximum number of channels

From: Ido Schimmel <idosch@...dia.com>

'MAX_CHANNEL_NUM' is defined in the common SFF code as 4 and used to set
the size of the per-channel diagnostics array in the common 'sff_diags'
structure.

The CMIS parsing code is also going to use the structure, but it can
have up to 32 channels, unlike SFF-8636 that only has 4.

Therefore, set 'MAX_CHANNEL_NUM' to 32 and change the SFF-8636 code to
use an SFF-8636 specific define instead of the common 'MAX_CHANNEL_NUM'.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 qsfp.c       | 9 +++++----
 sff-common.h | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/qsfp.c b/qsfp.c
index e7c2f51cd9c6..58c4c4775e9b 100644
--- a/qsfp.c
+++ b/qsfp.c
@@ -71,6 +71,7 @@ struct sff8636_memory_map {
 
 #define SFF8636_PAGE_SIZE	0x80
 #define SFF8636_I2C_ADDRESS	0x50
+#define SFF8636_MAX_CHANNEL_NUM	4
 
 #define MAX_DESC_SIZE	42
 
@@ -761,7 +762,7 @@ static void sff8636_dom_parse(const struct sff8636_memory_map *map,
 
 out:
 	/* Channel Specific Data */
-	for (i = 0; i < MAX_CHANNEL_NUM; i++) {
+	for (i = 0; i < SFF8636_MAX_CHANNEL_NUM; i++) {
 		u8 rx_power_offset, tx_bias_offset;
 		u8 tx_power_offset;
 
@@ -832,13 +833,13 @@ static void sff8636_show_dom(const struct sff8636_memory_map *map)
 	printf("\t%-41s : %s\n", "Alarm/warning flags implemented",
 		(sd.supports_alarms ? "Yes" : "No"));
 
-	for (i = 0; i < MAX_CHANNEL_NUM; i++) {
+	for (i = 0; i < SFF8636_MAX_CHANNEL_NUM; i++) {
 		snprintf(power_string, MAX_DESC_SIZE, "%s (Channel %d)",
 					"Laser tx bias current", i+1);
 		PRINT_BIAS(power_string, sd.scd[i].bias_cur);
 	}
 
-	for (i = 0; i < MAX_CHANNEL_NUM; i++) {
+	for (i = 0; i < SFF8636_MAX_CHANNEL_NUM; i++) {
 		snprintf(power_string, MAX_DESC_SIZE, "%s (Channel %d)",
 					"Transmit avg optical power", i+1);
 		PRINT_xX_PWR(power_string, sd.scd[i].tx_power);
@@ -849,7 +850,7 @@ static void sff8636_show_dom(const struct sff8636_memory_map *map)
 	else
 		rx_power_string = "Rcvr signal avg optical power";
 
-	for (i = 0; i < MAX_CHANNEL_NUM; i++) {
+	for (i = 0; i < SFF8636_MAX_CHANNEL_NUM; i++) {
 		snprintf(power_string, MAX_DESC_SIZE, "%s(Channel %d)",
 					rx_power_string, i+1);
 		PRINT_xX_PWR(power_string, sd.scd[i].rx_power);
diff --git a/sff-common.h b/sff-common.h
index 2183f41ff9c9..aab306e0b74f 100644
--- a/sff-common.h
+++ b/sff-common.h
@@ -160,7 +160,7 @@ struct sff_channel_diags {
 /* Module Monitoring Fields */
 struct sff_diags {
 
-#define MAX_CHANNEL_NUM 4
+#define MAX_CHANNEL_NUM 32
 #define LWARN 0
 #define HWARN 1
 #define LALRM 2
-- 
2.31.1