From: Sasha Neftin Date: Wed, 8 Jan 2020 08:19:24 +0000 (+0200) Subject: igc: Add PHY power management control X-Git-Tag: v5.15~4637^2~74^2~4 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=bcb3244ccdc4cebb6ed3d47d973da7b1a03837c0;p=mirror_ubuntu-kernels.git igc: Add PHY power management control PHY power management control should provide a reliable and accurate indication of PHY reset completion and decrease the delay time after a PHY reset Signed-off-by: Sasha Neftin Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h index 9e34b0969322..58efa7a02c68 100644 --- a/drivers/net/ethernet/intel/igc/igc_defines.h +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -464,6 +464,7 @@ /* PHY Status Register */ #define MII_SR_LINK_STATUS 0x0004 /* Link Status 1 = link */ #define MII_SR_AUTONEG_COMPLETE 0x0020 /* Auto Neg Complete */ +#define IGC_PHY_RST_COMP 0x0100 /* Internal PHY reset completion */ /* PHY 1000 MII Register/Bit Definitions */ /* PHY Registers defined by IEEE */ diff --git a/drivers/net/ethernet/intel/igc/igc_phy.c b/drivers/net/ethernet/intel/igc/igc_phy.c index f4b05af0dd2f..8e1799508edc 100644 --- a/drivers/net/ethernet/intel/igc/igc_phy.c +++ b/drivers/net/ethernet/intel/igc/igc_phy.c @@ -173,6 +173,7 @@ s32 igc_check_downshift(struct igc_hw *hw) s32 igc_phy_hw_reset(struct igc_hw *hw) { struct igc_phy_info *phy = &hw->phy; + u32 phpm = 0, timeout = 10000; s32 ret_val; u32 ctrl; @@ -186,6 +187,8 @@ s32 igc_phy_hw_reset(struct igc_hw *hw) if (ret_val) goto out; + phpm = rd32(IGC_I225_PHPM); + ctrl = rd32(IGC_CTRL); wr32(IGC_CTRL, ctrl | IGC_CTRL_PHY_RST); wrfl(); @@ -195,7 +198,18 @@ s32 igc_phy_hw_reset(struct igc_hw *hw) wr32(IGC_CTRL, ctrl); wrfl(); - usleep_range(1500, 2000); + /* SW should guarantee 100us for the completion of the PHY reset */ + usleep_range(100, 150); + do { + phpm = rd32(IGC_I225_PHPM); + timeout--; + udelay(1); + } while (!(phpm & IGC_PHY_RST_COMP) && timeout); + + if (!timeout) + hw_dbg("Timeout is expired after a phy reset\n"); + + usleep_range(100, 150); phy->ops.release(hw); diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h index c82111051898..c9029b549b90 100644 --- a/drivers/net/ethernet/intel/igc/igc_regs.h +++ b/drivers/net/ethernet/intel/igc/igc_regs.h @@ -12,6 +12,7 @@ #define IGC_MDIC 0x00020 /* MDI Control - RW */ #define IGC_MDICNFG 0x00E04 /* MDC/MDIO Configuration - RW */ #define IGC_CONNSW 0x00034 /* Copper/Fiber switch control - RW */ +#define IGC_I225_PHPM 0x00E14 /* I225 PHY Power Management */ /* Internal Packet Buffer Size Registers */ #define IGC_RXPBS 0x02404 /* Rx Packet Buffer Size - RW */