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Miller" , Jakub Kicinski CC: , , Shyam Sundar S K , Sudheesh Mavila Subject: [net,v3] net: amd-xgbe: Toggle PLL settings during rate change Date: Wed, 27 Oct 2021 15:27:27 +0530 Message-ID: <20211027095727.2072881-1-Shyam-sundar.S-k@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 0ce866ad-91eb-4f66-e133-08d99930489f X-MS-TrafficTypeDiagnostic: DM4PR12MB5056: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:451; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(36840700001)(46966006)(8936002)(2906002)(54906003)(316002)(7696005)(426003)(356005)(81166007)(1076003)(186003)(47076005)(508600001)(70206006)(36756003)(82310400003)(6666004)(36860700001)(8676002)(336012)(5660300002)(2616005)(4326008)(86362001)(83380400001)(26005)(110136005)(16526019)(70586007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2021 09:58:10.3954 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0ce866ad-91eb-4f66-e133-08d99930489f X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT066.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5056 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org For each rate change command submission, the FW has to do a phy power off sequence internally. For this to happen correctly, the PLL re-initialization control setting has to be turned off before sending mailbox commands and re-enabled once the command submission is complete. Without the PLL control setting, the link up takes longer time in a fixed phy configuration. Fixes: 47f164deab22 ("amd-xgbe: Add PCI device support") Co-developed-by: Sudheesh Mavila Signed-off-by: Sudheesh Mavila Signed-off-by: Shyam Sundar S K Acked-by: Tom Lendacky --- v1->v2: - Add Co-Developed-by: tag v2->v3: - Code Alignment - Add Fixes: tag - Add more information in the commit message. drivers/net/ethernet/amd/xgbe/xgbe-common.h | 8 ++++++++ drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 20 +++++++++++++++++++- 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h index b2cd3bdba9f8..533b8519ec35 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h @@ -1331,6 +1331,10 @@ #define MDIO_VEND2_PMA_CDR_CONTROL 0x8056 #endif +#ifndef MDIO_VEND2_PMA_MISC_CTRL0 +#define MDIO_VEND2_PMA_MISC_CTRL0 0x8090 +#endif + #ifndef MDIO_CTRL1_SPEED1G #define MDIO_CTRL1_SPEED1G (MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100) #endif @@ -1389,6 +1393,10 @@ #define XGBE_PMA_RX_RST_0_RESET_ON 0x10 #define XGBE_PMA_RX_RST_0_RESET_OFF 0x00 +#define XGBE_PMA_PLL_CTRL_MASK BIT(15) +#define XGBE_PMA_PLL_CTRL_ENABLE BIT(15) +#define XGBE_PMA_PLL_CTRL_DISABLE 0x0000 + /* Bit setting and getting macros * The get macro will extract the current bit field value from within * the variable diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c index 18e48b3bc402..213769054391 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c @@ -1977,12 +1977,26 @@ static void xgbe_phy_rx_reset(struct xgbe_prv_data *pdata) } } +static void xgbe_phy_pll_ctrl(struct xgbe_prv_data *pdata, bool enable) +{ + XMDIO_WRITE_BITS(pdata, MDIO_MMD_PMAPMD, MDIO_VEND2_PMA_MISC_CTRL0, + XGBE_PMA_PLL_CTRL_MASK, + enable ? XGBE_PMA_PLL_CTRL_ENABLE + : XGBE_PMA_PLL_CTRL_DISABLE); + + /* Wait for command to complete */ + usleep_range(100, 200); +} + static void xgbe_phy_perform_ratechange(struct xgbe_prv_data *pdata, unsigned int cmd, unsigned int sub_cmd) { unsigned int s0 = 0; unsigned int wait; + /* Disable PLL re-initialization during FW command processing */ + xgbe_phy_pll_ctrl(pdata, false); + /* Log if a previous command did not complete */ if (XP_IOREAD_BITS(pdata, XP_DRIVER_INT_RO, STATUS)) { netif_dbg(pdata, link, pdata->netdev, @@ -2003,7 +2017,7 @@ static void xgbe_phy_perform_ratechange(struct xgbe_prv_data *pdata, wait = XGBE_RATECHANGE_COUNT; while (wait--) { if (!XP_IOREAD_BITS(pdata, XP_DRIVER_INT_RO, STATUS)) - return; + goto reenable_pll; usleep_range(1000, 2000); } @@ -2013,6 +2027,10 @@ static void xgbe_phy_perform_ratechange(struct xgbe_prv_data *pdata, /* Reset on error */ xgbe_phy_rx_reset(pdata); + +reenable_pll: + /* Enable PLL re-initialization */ + xgbe_phy_pll_ctrl(pdata, true); } static void xgbe_phy_rrc(struct xgbe_prv_data *pdata) -- 2.25.1