From: Ganesh Goudar <ganeshgr@chelsio.com>
Date: Wed, 30 May 2018 17:15:50 +0530
Subject: cxgb4: Add FORCE_PAUSE bit to 32 bit port caps
Patch-mainline: v4.18-rc1
Git-commit: c5f732d7deb81a3c76c6d9b1045da800b22b196b
References: bsc#1097585 bsc#1097586 bsc#1097587 bsc#1097588 bsc#1097583 bsc#1097584

Add FORCE_PAUSE bit to force local pause settings instead
of using auto negotiated values.

Signed-off-by: Santosh Rastapur <santosh@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/chelsio/cxgb4/t4_hw.c    |   10 +++++++++-
 drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h |    5 +++--
 2 files changed, 12 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3939,6 +3939,7 @@ static fw_port_cap32_t fwcaps16_to_caps3
 	CAP16_TO_CAP32(FC_RX);
 	CAP16_TO_CAP32(FC_TX);
 	CAP16_TO_CAP32(ANEG);
+	CAP16_TO_CAP32(FORCE_PAUSE);
 	CAP16_TO_CAP32(MDIAUTO);
 	CAP16_TO_CAP32(MDISTRAIGHT);
 	CAP16_TO_CAP32(FEC_RS);
@@ -3980,6 +3981,7 @@ static fw_port_cap16_t fwcaps32_to_caps1
 	CAP32_TO_CAP16(802_3_PAUSE);
 	CAP32_TO_CAP16(802_3_ASM_DIR);
 	CAP32_TO_CAP16(ANEG);
+	CAP32_TO_CAP16(FORCE_PAUSE);
 	CAP32_TO_CAP16(MDIAUTO);
 	CAP32_TO_CAP16(MDISTRAIGHT);
 	CAP32_TO_CAP16(FEC_RS);
@@ -4012,6 +4014,8 @@ static inline fw_port_cap32_t cc_to_fwca
 		fw_pause |= FW_PORT_CAP32_FC_RX;
 	if (cc_pause & PAUSE_TX)
 		fw_pause |= FW_PORT_CAP32_FC_TX;
+	if (!(cc_pause & PAUSE_AUTONEG))
+		fw_pause |= FW_PORT_CAP32_FORCE_PAUSE;
 
 	return fw_pause;
 }
@@ -4099,7 +4103,11 @@ int t4_link_l1cfg_core(struct adapter *a
 		rcap = lc->acaps | fw_fc | fw_fec | fw_mdi;
 	}
 
-	if (rcap & ~lc->pcaps) {
+	/* Note that older Firmware doesn't have FW_PORT_CAP32_FORCE_PAUSE, so
+	 * we need to exclude this from this check in order to maintain
+	 * compatibility ...
+	 */
+	if ((rcap & ~lc->pcaps) & ~FW_PORT_CAP32_FORCE_PAUSE) {
 		dev_err(adapter->pdev_dev,
 			"Requested Port Capabilities %#x exceed Physical Port Capabilities %#x\n",
 			rcap, lc->pcaps);
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -2397,7 +2397,7 @@ enum fw_port_cap {
 	FW_PORT_CAP_MDISTRAIGHT		= 0x0400,
 	FW_PORT_CAP_FEC_RS		= 0x0800,
 	FW_PORT_CAP_FEC_BASER_RS	= 0x1000,
-	FW_PORT_CAP_FEC_RESERVED	= 0x2000,
+	FW_PORT_CAP_FORCE_PAUSE		= 0x2000,
 	FW_PORT_CAP_802_3_PAUSE		= 0x4000,
 	FW_PORT_CAP_802_3_ASM_DIR	= 0x8000,
 };
@@ -2444,7 +2444,8 @@ enum fw_port_mdi {
 #define	FW_PORT_CAP32_FEC_RESERVED1	0x02000000UL
 #define	FW_PORT_CAP32_FEC_RESERVED2	0x04000000UL
 #define	FW_PORT_CAP32_FEC_RESERVED3	0x08000000UL
-#define	FW_PORT_CAP32_RESERVED2		0xf0000000UL
+#define FW_PORT_CAP32_FORCE_PAUSE	0x10000000UL
+#define FW_PORT_CAP32_RESERVED2		0xe0000000UL
 
 #define FW_PORT_CAP32_SPEED_S	0
 #define FW_PORT_CAP32_SPEED_M	0xfff