From: Heiner Kallweit Date: Sat, 28 Apr 2018 20:19:26 +0000 (+0200) Subject: r8169: improve CPlusCmd handling X-Git-Tag: v4.19~872^2~345^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0ae0974eb3d08e2166dd83aa669b63cb84a5ced3;p=platform%2Fkernel%2Flinux-rpi.git r8169: improve CPlusCmd handling tp->cp_cmd is supposed to reflect the current value of the CplusCmd register. Several (quite old) changes however directly change this register w/o updating tp->cp_cmd. Also we have places in the code reading this register where we could use the cached value. In addition: - Properly initialize tp->cmd with the register value. - In rtl_hw_start_8169 remove one setting of PCIMulRW because it's set unconditionally anyway a few lines later. - In rtl_hw_start_8168 properly mask out the INTT bits before setting INTT_1. So far we rely on both bits being zero. Signed-off-by: Heiner Kallweit Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 1dd189d..868dee7 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -1962,8 +1962,6 @@ static int rtl8169_set_features(struct net_device *dev, else tp->cp_cmd &= ~RxVlan; - tp->cp_cmd |= RTL_R16(tp, CPlusCmd) & ~(RxVlan | RxChkSum); - RTL_W16(tp, CPlusCmd, tp->cp_cmd); RTL_R16(tp, CPlusCmd); @@ -2345,7 +2343,7 @@ static int rtl_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) if (IS_ERR(ci)) return PTR_ERR(ci); - scale = &ci->scalev[RTL_R16(tp, CPlusCmd) & INTT_MASK]; + scale = &ci->scalev[tp->cp_cmd & INTT_MASK]; /* read IntrMitigate and adjust according to scale */ for (w = RTL_R16(tp, IntrMitigate); w; w >>= RTL_COALESCE_SHIFT, p++) { @@ -4841,7 +4839,7 @@ static void r8168_pll_power_down(struct rtl8169_private *tp) if ((tp->mac_version == RTL_GIGA_MAC_VER_23 || tp->mac_version == RTL_GIGA_MAC_VER_24) && - (RTL_R16(tp, CPlusCmd) & ASF)) { + (tp->cp_cmd & ASF)) { return; } @@ -5321,15 +5319,6 @@ static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp) RTL_W32(tp, RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_BIT_MASK(32)); } -static u16 rtl_rw_cpluscmd(struct rtl8169_private *tp) -{ - u16 cmd; - - cmd = RTL_R16(tp, CPlusCmd); - RTL_W16(tp, CPlusCmd, cmd); - return cmd; -} - static void rtl_set_rx_max_size(struct rtl8169_private *tp) { /* Low hurts. Let's disable the filtering. */ @@ -5415,10 +5404,8 @@ static void rtl_set_rx_mode(struct net_device *dev) static void rtl_hw_start_8169(struct rtl8169_private *tp) { - if (tp->mac_version == RTL_GIGA_MAC_VER_05) { - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) | PCIMulRW); + if (tp->mac_version == RTL_GIGA_MAC_VER_05) pci_write_config_byte(tp->pci_dev, PCI_CACHE_LINE_SIZE, 0x08); - } RTL_W8(tp, Cfg9346, Cfg9346_Unlock); if (tp->mac_version == RTL_GIGA_MAC_VER_01 || @@ -5439,7 +5426,7 @@ static void rtl_hw_start_8169(struct rtl8169_private *tp) tp->mac_version == RTL_GIGA_MAC_VER_04) rtl_set_rx_tx_config_registers(tp); - tp->cp_cmd |= rtl_rw_cpluscmd(tp) | PCIMulRW; + tp->cp_cmd |= PCIMulRW; if (tp->mac_version == RTL_GIGA_MAC_VER_02 || tp->mac_version == RTL_GIGA_MAC_VER_03) { @@ -5671,7 +5658,8 @@ static void rtl_hw_start_8168bb(struct rtl8169_private *tp) { RTL_W8(tp, Config3, RTL_R8(tp, Config3) & ~Beacon_en); - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK); + tp->cp_cmd &= ~R8168_CPCMD_QUIRK_MASK; + RTL_W16(tp, CPlusCmd, tp->cp_cmd); if (tp->dev->mtu <= ETH_DATA_LEN) { rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_4096B | @@ -5699,7 +5687,8 @@ static void __rtl_hw_start_8168cp(struct rtl8169_private *tp) rtl_disable_clock_request(tp); - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK); + tp->cp_cmd &= ~R8168_CPCMD_QUIRK_MASK; + RTL_W16(tp, CPlusCmd, tp->cp_cmd); } static void rtl_hw_start_8168cp_1(struct rtl8169_private *tp) @@ -5728,7 +5717,8 @@ static void rtl_hw_start_8168cp_2(struct rtl8169_private *tp) if (tp->dev->mtu <= ETH_DATA_LEN) rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_4096B); - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK); + tp->cp_cmd &= ~R8168_CPCMD_QUIRK_MASK; + RTL_W16(tp, CPlusCmd, tp->cp_cmd); } static void rtl_hw_start_8168cp_3(struct rtl8169_private *tp) @@ -5745,7 +5735,8 @@ static void rtl_hw_start_8168cp_3(struct rtl8169_private *tp) if (tp->dev->mtu <= ETH_DATA_LEN) rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_4096B); - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK); + tp->cp_cmd &= ~R8168_CPCMD_QUIRK_MASK; + RTL_W16(tp, CPlusCmd, tp->cp_cmd); } static void rtl_hw_start_8168c_1(struct rtl8169_private *tp) @@ -5802,7 +5793,8 @@ static void rtl_hw_start_8168d(struct rtl8169_private *tp) if (tp->dev->mtu <= ETH_DATA_LEN) rtl_tx_performance_tweak(tp, PCI_EXP_DEVCTL_READRQ_4096B); - RTL_W16(tp, CPlusCmd, RTL_R16(tp, CPlusCmd) & ~R8168_CPCMD_QUIRK_MASK); + tp->cp_cmd &= ~R8168_CPCMD_QUIRK_MASK; + RTL_W16(tp, CPlusCmd, tp->cp_cmd); } static void rtl_hw_start_8168dp(struct rtl8169_private *tp) @@ -6271,8 +6263,8 @@ static void rtl_hw_start_8168(struct rtl8169_private *tp) rtl_set_rx_max_size(tp); - tp->cp_cmd |= RTL_R16(tp, CPlusCmd) | PktCntrDisable | INTT_1; - + tp->cp_cmd &= ~INTT_MASK; + tp->cp_cmd |= PktCntrDisable | INTT_1; RTL_W16(tp, CPlusCmd, tp->cp_cmd); RTL_W16(tp, IntrMitigate, 0x5151); @@ -8130,7 +8122,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) /* Identify chip attached to board */ rtl8169_get_mac_version(tp, cfg->default_ver); - tp->cp_cmd = 0; + tp->cp_cmd = RTL_R16(tp, CPlusCmd); if ((sizeof(dma_addr_t) > 4) && (use_dac == 1 || (use_dac == -1 && pci_is_pcie(pdev) &&