netdev - [PATCH net-next] cxgb4: Add FORCE_PAUSE bit to 32 bit port caps

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Date:   Wed, 30 May 2018 17:15:50 +0530
From:   Ganesh Goudar <ganeshgr@...lsio.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     nirranjan@...lsio.com, indranil@...lsio.com,
        Ganesh Goudar <ganeshgr@...lsio.com>,
        Santosh Rastapur <santosh@...lsio.com>,
        Casey Leedom <leedom@...lsio.com>
Subject: [PATCH net-next] cxgb4: Add FORCE_PAUSE bit to 32 bit port caps

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

Signed-off-by: Santosh Rastapur <santosh@...lsio.com>
Signed-off-by: Casey Leedom <leedom@...lsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com>
---
 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(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 39da7e3..974a868 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3941,6 +3941,7 @@ static fw_port_cap32_t fwcaps16_to_caps32(fw_port_cap16_t caps16)
 	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);
@@ -3982,6 +3983,7 @@ static fw_port_cap16_t fwcaps32_to_caps16(fw_port_cap32_t caps32)
 	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);
@@ -4014,6 +4016,8 @@ static inline fw_port_cap32_t cc_to_fwcap_pause(enum cc_pause cc_pause)
 		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;
 }
@@ -4101,7 +4105,11 @@ int t4_link_l1cfg_core(struct adapter *adapter, unsigned int mbox,
 		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);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index 2d91480..f1967cf 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -2475,7 +2475,7 @@ 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,
 };
@@ -2522,7 +2522,8 @@ 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
-- 
2.1.0