[resend] Renesas Ethernet AVB driver

Message ID	2926619.fiYHPz1IBk@wasted.cogentembedded.com (mailing list archive)
State	Superseded
Delegated to:	Geert Uytterhoeven
Headers	show Return-Path: <linux-sh-owner@kernel.org> From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org, galak@codeaurora.org, netdev@vger.kernel.org Cc: linux-sh@vger.kernel.org Subject: [PATCH resend] Renesas Ethernet AVB driver Date: Sat, 28 Mar 2015 02:13:19 +0300 Message-ID: <2926619.fiYHPz1IBk@wasted.cogentembedded.com> Organization: Cogent Embedded Inc. User-Agent: KMail/4.14.4 (Linux/3.18.9-100.fc20.x86_64; KDE/4.14.6; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-sh-owner@vger.kernel.org Precedence: bulk

On Sat, Mar 28, 2015 at 02:13:19AM +0300, Sergei Shtylyov wrote: > Ethernet AVB includes an Gigabit Ethernet controller (E-MAC) that is basically > compatible with SuperH Gigabit Ethernet E-MAC). Ethernet AVB has a dedicated > direct memory access controller (AVB-DMAC) that is a new design compared to the > SuperH E-DMAC. The AVB-DMAC is compliant with 3 standards formulated for IEEE > 802.1BA: IEEE 802.1AS timing and synchronization protocol, IEEE 802.1Qav real- > time transfer, and the IEEE 802.1Qat stream reservation protocol. Since this is a PTP Hardware Clock driver, why not include the maintainer on CC? > The driver only supports device tree probing, so the binding document is > included in this patch. > > Based on the patches by Mitsuhiro Kimura <mitsuhiro.kimura.kc@renesas.com> and > Masaru Nagai <masaru.nagai.vx@renesas.com>. > > Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> We also need SOB from Mitsuhiro and Masaru. ... > Index: net-next/drivers/net/ethernet/renesas/ravb.c > =================================================================== > --- /dev/null > +++ net-next/drivers/net/ethernet/renesas/ravb.c > @@ -0,0 +1,3071 @@ > +/* Renesas Ethernet AVB device driver > + * > + * Copyright (C) 2014-2015 Renesas Electronics Corporation > + * Copyright (C) 2015 Renesas Solutions Corp. > + * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com> > + * > + * Based on the SuperH Ethernet driver > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License version 2, > + * as published by the Free Software Foundation. > + */ > + > +#include <linux/cache.h> > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/dma-mapping.h> > +#include <linux/err.h> > +#include <linux/etherdevice.h> > +#include <linux/ethtool.h> > +#include <linux/if_vlan.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/kernel.h> > +#include <linux/list.h> > +#include <linux/mdio-bitbang.h> > +#include <linux/module.h> > +#include <linux/netdevice.h> > +#include <linux/net_tstamp.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/of_irq.h> > +#include <linux/of_mdio.h> > +#include <linux/of_net.h> > +#include <linux/phy.h> > +#include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > +#include <linux/ptp_clock_kernel.h> > +#include <linux/slab.h> > +#include <linux/spinlock.h> > + > +#define TX_TIMEOUT (5 * HZ) > + > +#define BE_TX_RING_SIZE 64 /* TX ring size for Best Effort */ > +#define BE_RX_RING_SIZE 1024 /* RX ring size for Best Effort */ > +#define NC_TX_RING_SIZE 64 /* TX ring size for Network Control */ > +#define NC_RX_RING_SIZE 64 /* RX ring size for Network Control */ > +#define BE_TX_RING_MIN 64 > +#define BE_RX_RING_MIN 64 > +#define NC_TX_RING_MIN 64 > +#define NC_RX_RING_MIN 64 > +#define BE_TX_RING_MAX 1024 > +#define BE_RX_RING_MAX 2048 > +#define NC_TX_RING_MAX 128 > +#define NC_RX_RING_MAX 128 > + > +#define PKT_BUF_SZ 1538 > + > +enum ravb_reg { > + /* AVB-DMAC registers */ > + CCC = 0x0000, > + DBAT = 0x0004, > + DLR = 0x0008, > + CSR = 0x000C, > + CDAR0 = 0x0010, > + CDAR1 = 0x0014, > + CDAR2 = 0x0018, > + CDAR3 = 0x001C, > + CDAR4 = 0x0020, > + CDAR5 = 0x0024, > + CDAR6 = 0x0028, > + CDAR7 = 0x002C, > + CDAR8 = 0x0030, > + CDAR9 = 0x0034, > + CDAR10 = 0x0038, > + CDAR11 = 0x003C, > + CDAR12 = 0x0040, > + CDAR13 = 0x0044, > + CDAR14 = 0x0048, > + CDAR15 = 0x004C, > + CDAR16 = 0x0050, > + CDAR17 = 0x0054, > + CDAR18 = 0x0058, > + CDAR19 = 0x005C, > + CDAR20 = 0x0060, > + CDAR21 = 0x0064, > + ESR = 0x0088, > + RCR = 0x0090, > + RQC0 = 0x0094, > + RQC1 = 0x0098, > + RQC2 = 0x009C, > + RQC3 = 0x00A0, > + RQC4 = 0x00A4, > + RPC = 0x00B0, > + UFCW = 0x00BC, > + UFCS = 0x00C0, > + UFCV0 = 0x00C4, > + UFCV1 = 0x00C8, > + UFCV2 = 0x00CC, > + UFCV3 = 0x00D0, > + UFCV4 = 0x00D4, > + UFCD0 = 0x00E0, > + UFCD1 = 0x00E4, > + UFCD2 = 0x00E8, > + UFCD3 = 0x00EC, > + UFCD4 = 0x00F0, > + SFO = 0x00FC, > + SFP0 = 0x0100, > + SFP1 = 0x0104, > + SFP2 = 0x0108, > + SFP3 = 0x010C, > + SFP4 = 0x0110, > + SFP5 = 0x0114, > + SFP6 = 0x0118, > + SFP7 = 0x011C, > + SFP8 = 0x0120, > + SFP9 = 0x0124, > + SFP10 = 0x0128, > + SFP11 = 0x012C, > + SFP12 = 0x0130, > + SFP13 = 0x0134, > + SFP14 = 0x0138, > + SFP15 = 0x013C, > + SFP16 = 0x0140, > + SFP17 = 0x0144, > + SFP18 = 0x0148, > + SFP19 = 0x014C, > + SFP20 = 0x0150, > + SFP21 = 0x0154, > + SFP22 = 0x0158, > + SFP23 = 0x015C, > + SFP24 = 0x0160, > + SFP25 = 0x0164, > + SFP26 = 0x0168, > + SFP27 = 0x016C, > + SFP28 = 0x0170, > + SFP29 = 0x0174, > + SFP30 = 0x0178, > + SFP31 = 0x017C, > + SFM0 = 0x01C0, > + SFM1 = 0x01C4, > + TGC = 0x0300, > + TCCR = 0x0304, > + TSR = 0x0308, > + TFA0 = 0x0310, > + TFA1 = 0x0314, > + TFA2 = 0x0318, > + CIVR0 = 0x0320, > + CIVR1 = 0x0324, > + CDVR0 = 0x0328, > + CDVR1 = 0x032C, > + CUL0 = 0x0330, > + CUL1 = 0x0334, > + CLL0 = 0x0338, > + CLL1 = 0x033C, > + DIC = 0x0350, > + DIS = 0x0354, > + EIC = 0x0358, > + EIS = 0x035C, > + RIC0 = 0x0360, > + RIS0 = 0x0364, > + RIC1 = 0x0368, > + RIS1 = 0x036C, > + RIC2 = 0x0370, > + RIS2 = 0x0374, > + TIC = 0x0378, > + TIS = 0x037C, > + ISS = 0x0380, > + GCCR = 0x0390, > + GMTT = 0x0394, > + GPTC = 0x0398, > + GTI = 0x039C, > + GTO0 = 0x03A0, > + GTO1 = 0x03A4, > + GTO2 = 0x03A8, > + GIC = 0x03AC, > + GIS = 0x03B0, > + GCPT = 0x03B4, /* Undocumented? */ > + GCT0 = 0x03B8, > + GCT1 = 0x03BC, > + GCT2 = 0x03C0, > + > + /* E-MAC registers */ > + ECMR = 0x0500, > + RFLR = 0x0508, > + ECSR = 0x0510, > + ECSIPR = 0x0518, > + PIR = 0x0520, > + PSR = 0x0528, > + PIPR = 0x052c, > + MPR = 0x0558, > + PFTCR = 0x055c, > + PFRCR = 0x0560, > + GECMR = 0x05b0, > + MAHR = 0x05c0, > + MALR = 0x05c8, > + TROCR = 0x0700, /* Undocumented? */ > + CDCR = 0x0708, /* Undocumented? */ > + LCCR = 0x0710, /* Undocumented? */ > + CEFCR = 0x0740, > + FRECR = 0x0748, > + TSFRCR = 0x0750, > + TLFRCR = 0x0758, > + RFCR = 0x0760, > + CERCR = 0x0768, /* Undocumented? */ > + CEECR = 0x0770, /* Undocumented? */ > + MAFCR = 0x0778, > +}; > + > +/* Driver's parameters */ > +#define RAVB_ALIGN 128 > + > +/* Hardware time stamp */ > +#define RAVB_TXTSTAMP_VALID 0x00000001 /* TX timestamp valid */ > +#define RAVB_TXTSTAMP_ENABLED 0x00000010 /* enable TX timestampping */ > +#define RAVB_RXTSTAMP_VALID 0x00000001 /* RX timestamp valid */ > +#define RAVB_RXTSTAMP_TYPE 0x00000006 /* RX type mask */ > +#define RAVB_RXTSTAMP_TYPE_V2_L2_EVENT 0x00000002 > +#define RAVB_RXTSTAMP_TYPE_ALL 0x00000006 > +#define RAVB_RXTSTAMP_ENABLED 0x00000010 /* enable rx timestampping */ > + > +/* Register bits of the Ethernet AVB */ > +/* CCC */ > +enum CCC_BIT { > + CCC_OPC = 0x00000003, > + CCC_OPC_RESET = 0x00000000, > + CCC_OPC_CONFIG = 0x00000001, > + CCC_OPC_OPERATION = 0x00000002, > + CCC_DTSR = 0x00000100, > + CCC_CSEL = 0x00030000, > + CCC_CSEL_HPB = 0x00010000, > + CCC_CSEL_ETH_TX = 0x00020000, > + CCC_CSEL_GMII_REF = 0x00030000, > + CCC_BOC = 0x00100000, /* Undocumented? */ > + CCC_LBME = 0x01000000, > +}; > + > +/* CSR */ > +enum CSR_BIT { > + CSR_OPS = 0x0000000F, > + CSR_OPS_RESET = 0x00000001, > + CSR_OPS_CONFIG = 0x00000002, > + CSR_OPS_OPERATION = 0x00000004, > + CSR_OPS_STANDBY = 0x00000008, /* Undocumented? */ > + CSR_DTS = 0x00000100, > + CSR_TPO0 = 0x00010000, > + CSR_TPO1 = 0x00020000, > + CSR_TPO2 = 0x00040000, > + CSR_TPO3 = 0x00080000, > + CSR_RPO = 0x00100000, > +}; > + > +/* ESR */ > +enum ESR_BIT { > + ESR_EQN = 0x0000001F, > + ESR_ET = 0x00000F00, > + ESR_EIL = 0x00001000, > +}; > + > +/* RCR */ > +enum RCR_BIT { > + RCR_EFFS = 0x00000001, > + RCR_ENCF = 0x00000002, > + RCR_ESF = 0x0000000C, > + RCR_ETS0 = 0x00000010, > + RCR_ETS2 = 0x00000020, > + RCR_RFCL = 0x1FFF0000, > +}; > + > +/* RQC0/1/2/3/4 */ > +enum RQC_BIT { > + RQC_RSM0 = 0x00000003, > + RQC_UFCC0 = 0x00000030, > + RQC_RSM1 = 0x00000300, > + RQC_UFCC1 = 0x00003000, > + RQC_RSM2 = 0x00030000, > + RQC_UFCC2 = 0x00300000, > + RQC_RSM3 = 0x03000000, > + RQC_UFCC3 = 0x30000000, > +}; > + > +/* RPC */ > +enum RPC_BIT { > + RPC_PCNT = 0x00000700, > + RPC_DCNT = 0x00FF0000, > +}; > + > +/* UFCW */ > +enum UFCW_BIT { > + UFCW_WL0 = 0x0000003F, > + UFCW_WL1 = 0x00003F00, > + UFCW_WL2 = 0x003F0000, > + UFCW_WL3 = 0x3F000000, > +}; > + > +/* UFCS */ > +enum UFCS_BIT { > + UFCS_SL0 = 0x0000003F, > + UFCS_SL1 = 0x00003F00, > + UFCS_SL2 = 0x003F0000, > + UFCS_SL3 = 0x3F000000, > +}; > + > +/* UFCV0/1/2/3/4 */ > +enum UFCV_BIT { > + UFCV_CV0 = 0x0000003F, > + UFCV_CV1 = 0x00003F00, > + UFCV_CV2 = 0x003F0000, > + UFCV_CV3 = 0x3F000000, > +}; > + > +/* UFCD0/1/2/3/4 */ > +enum UFCD_BIT { > + UFCD_DV0 = 0x0000003F, > + UFCD_DV1 = 0x00003F00, > + UFCD_DV2 = 0x003F0000, > + UFCD_DV3 = 0x3F000000, > +}; > + > +/* SFO */ > +enum SFO_BIT { > + SFO_FPB = 0x0000003F, > +}; > + > +/* RTC */ > +enum RTC_BIT { > + RTC_MFL0 = 0x00000FFF, > + RTC_MFL1 = 0x0FFF0000, > +}; > + > +/* TGC */ > +enum TGC_BIT { > + TGC_TSM0 = 0x00000001, > + TGC_TSM1 = 0x00000002, > + TGC_TSM2 = 0x00000004, > + TGC_TSM3 = 0x00000008, > + TGC_TQP = 0x00000030, > + TGC_TQP_NONAVB = 0x00000000, > + TGC_TQP_AVBMODE1 = 0x00000010, > + TGC_TQP_AVBMODE2 = 0x00000030, > + TGC_TBD0 = 0x00000300, > + TGC_TBD1 = 0x00003000, > + TGC_TBD2 = 0x00030000, > + TGC_TBD3 = 0x00300000, > +}; > + > +/* TCCR */ > +enum TCCR_BIT { > + TCCR_TSRQ0 = 0x00000001, > + TCCR_TSRQ1 = 0x00000002, > + TCCR_TSRQ2 = 0x00000004, > + TCCR_TSRQ3 = 0x00000008, > + TCCR_TFEN = 0x00000100, > + TCCR_TFR = 0x00000200, > +}; > + > +/* TSR */ > +enum TSR_BIT { > + TSR_CCS0 = 0x00000003, > + TSR_CCS1 = 0x0000000C, > + TSR_TFFL = 0x00000700, > +}; > + > +/* TFA2 */ > +enum TFA2_BIT { > + TFA2_TSV = 0x0000FFFF, > + TFA2_TST = 0x03FF0000, > +}; > + > +/* DIC */ > +enum DIC_BIT { > + DIC_DPE1 = 0x00000002, > + DIC_DPE2 = 0x00000004, > + DIC_DPE3 = 0x00000008, > + DIC_DPE4 = 0x00000010, > + DIC_DPE5 = 0x00000020, > + DIC_DPE6 = 0x00000040, > + DIC_DPE7 = 0x00000080, > + DIC_DPE8 = 0x00000100, > + DIC_DPE9 = 0x00000200, > + DIC_DPE10 = 0x00000400, > + DIC_DPE11 = 0x00000800, > + DIC_DPE12 = 0x00001000, > + DIC_DPE13 = 0x00002000, > + DIC_DPE14 = 0x00004000, > + DIC_DPE15 = 0x00008000, > +}; > + > +/* DIS */ > +enum DIS_BIT { > + DIS_DPF1 = 0x00000002, > + DIS_DPF2 = 0x00000004, > + DIS_DPF3 = 0x00000008, > + DIS_DPF4 = 0x00000010, > + DIS_DPF5 = 0x00000020, > + DIS_DPF6 = 0x00000040, > + DIS_DPF7 = 0x00000080, > + DIS_DPF8 = 0x00000100, > + DIS_DPF9 = 0x00000200, > + DIS_DPF10 = 0x00000400, > + DIS_DPF11 = 0x00000800, > + DIS_DPF12 = 0x00001000, > + DIS_DPF13 = 0x00002000, > + DIS_DPF14 = 0x00004000, > + DIS_DPF15 = 0x00008000, > +}; > + > +/* EIC */ > +enum EIC_BIT { > + EIC_MREE = 0x00000001, > + EIC_MTEE = 0x00000002, > + EIC_QEE = 0x00000004, > + EIC_SEE = 0x00000008, > + EIC_CLLE0 = 0x00000010, > + EIC_CLLE1 = 0x00000020, > + EIC_CULE0 = 0x00000040, > + EIC_CULE1 = 0x00000080, > + EIC_TFFE = 0x00000100, > +}; > + > +/* EIS */ > +enum EIS_BIT { > + EIS_MREF = 0x00000001, > + EIS_MTEF = 0x00000002, > + EIS_QEF = 0x00000004, > + EIS_SEF = 0x00000008, > + EIS_CLLF0 = 0x00000010, > + EIS_CLLF1 = 0x00000020, > + EIS_CULF0 = 0x00000040, > + EIS_CULF1 = 0x00000080, > + EIS_TFFF = 0x00000100, > + EIS_QFS = 0x00010000, > +}; > + > +/* RIC0 */ > +enum RIC0_BIT { > + RIC0_FRE0 = 0x00000001, > + RIC0_FRE1 = 0x00000002, > + RIC0_FRE2 = 0x00000004, > + RIC0_FRE3 = 0x00000008, > + RIC0_FRE4 = 0x00000010, > + RIC0_FRE5 = 0x00000020, > + RIC0_FRE6 = 0x00000040, > + RIC0_FRE7 = 0x00000080, > + RIC0_FRE8 = 0x00000100, > + RIC0_FRE9 = 0x00000200, > + RIC0_FRE10 = 0x00000400, > + RIC0_FRE11 = 0x00000800, > + RIC0_FRE12 = 0x00001000, > + RIC0_FRE13 = 0x00002000, > + RIC0_FRE14 = 0x00004000, > + RIC0_FRE15 = 0x00008000, > + RIC0_FRE16 = 0x00010000, > + RIC0_FRE17 = 0x00020000, > +}; > + > +/* RIC0 */ > +enum RIS0_BIT { > + RIS0_FRF0 = 0x00000001, > + RIS0_FRF1 = 0x00000002, > + RIS0_FRF2 = 0x00000004, > + RIS0_FRF3 = 0x00000008, > + RIS0_FRF4 = 0x00000010, > + RIS0_FRF5 = 0x00000020, > + RIS0_FRF6 = 0x00000040, > + RIS0_FRF7 = 0x00000080, > + RIS0_FRF8 = 0x00000100, > + RIS0_FRF9 = 0x00000200, > + RIS0_FRF10 = 0x00000400, > + RIS0_FRF11 = 0x00000800, > + RIS0_FRF12 = 0x00001000, > + RIS0_FRF13 = 0x00002000, > + RIS0_FRF14 = 0x00004000, > + RIS0_FRF15 = 0x00008000, > + RIS0_FRF16 = 0x00010000, > + RIS0_FRF17 = 0x00020000, > +}; > + > +/* RIC1 */ > +enum RIC1_BIT { > + RIC1_RFWE = 0x80000000, > +}; > + > +/* RIS1 */ > +enum RIS1_BIT { > + RIS1_RFWF = 0x80000000, > +}; > + > +/* RIC2 */ > +enum RIC2_BIT { > + RIC2_QFE0 = 0x00000001, > + RIC2_QFE1 = 0x00000002, > + RIC2_QFE2 = 0x00000004, > + RIC2_QFE3 = 0x00000008, > + RIC2_QFE4 = 0x00000010, > + RIC2_QFE5 = 0x00000020, > + RIC2_QFE6 = 0x00000040, > + RIC2_QFE7 = 0x00000080, > + RIC2_QFE8 = 0x00000100, > + RIC2_QFE9 = 0x00000200, > + RIC2_QFE10 = 0x00000400, > + RIC2_QFE11 = 0x00000800, > + RIC2_QFE12 = 0x00001000, > + RIC2_QFE13 = 0x00002000, > + RIC2_QFE14 = 0x00004000, > + RIC2_QFE15 = 0x00008000, > + RIC2_QFE16 = 0x00010000, > + RIC2_QFE17 = 0x00020000, > + RIC2_RFFE = 0x80000000, > +}; > + > +/* RIS2 */ > +enum RIS2_BIT { > + RIS2_QFF0 = 0x00000001, > + RIS2_QFF1 = 0x00000002, > + RIS2_QFF2 = 0x00000004, > + RIS2_QFF3 = 0x00000008, > + RIS2_QFF4 = 0x00000010, > + RIS2_QFF5 = 0x00000020, > + RIS2_QFF6 = 0x00000040, > + RIS2_QFF7 = 0x00000080, > + RIS2_QFF8 = 0x00000100, > + RIS2_QFF9 = 0x00000200, > + RIS2_QFF10 = 0x00000400, > + RIS2_QFF11 = 0x00000800, > + RIS2_QFF12 = 0x00001000, > + RIS2_QFF13 = 0x00002000, > + RIS2_QFF14 = 0x00004000, > + RIS2_QFF15 = 0x00008000, > + RIS2_QFF16 = 0x00010000, > + RIS2_QFF17 = 0x00020000, > + RIS2_RFFF = 0x80000000, > +}; > + > +/* TIC */ > +enum TIC_BIT { > + TIC_FTE0 = 0x00000001, /* Undocumented? */ > + TIC_FTE1 = 0x00000002, /* Undocumented? */ > + TIC_TFUE = 0x00000100, > + TIC_TFWE = 0x00000200, > +}; > + > +/* TIS */ > +enum TIS_BIT { > + TIS_FTF0 = 0x00000001, /* Undocumented? */ > + TIS_FTF1 = 0x00000002, /* Undocumented? */ > + TIS_TFUF = 0x00000100, > + TIS_TFWF = 0x00000200, > +}; > + > +/* ISS */ > +enum ISS_BIT { > + ISS_FRS = 0x00000001, /* Undocumented? */ > + ISS_FTS = 0x00000004, /* Undocumented? */ > + ISS_ES = 0x00000040, > + ISS_MS = 0x00000080, > + ISS_TFUS = 0x00000100, > + ISS_TFWS = 0x00000200, > + ISS_RFWS = 0x00001000, > + ISS_CGIS = 0x00002000, > + ISS_DPS1 = 0x00020000, > + ISS_DPS2 = 0x00040000, > + ISS_DPS3 = 0x00080000, > + ISS_DPS4 = 0x00100000, > + ISS_DPS5 = 0x00200000, > + ISS_DPS6 = 0x00400000, > + ISS_DPS7 = 0x00800000, > + ISS_DPS8 = 0x01000000, > + ISS_DPS9 = 0x02000000, > + ISS_DPS10 = 0x04000000, > + ISS_DPS11 = 0x08000000, > + ISS_DPS12 = 0x10000000, > + ISS_DPS13 = 0x20000000, > + ISS_DPS14 = 0x40000000, > + ISS_DPS15 = 0x80000000, > +}; > + > +/* GCCR */ > +enum GCCR_BIT { > + GCCR_TCR = 0x00000003, > + GCCR_TCR_NOREQ = 0x00000000, /* No request */ > + GCCR_TCR_RESET = 0x00000001, /* gPTP/AVTP presentation timer reset */ > + GCCR_TCR_CAPTURE = 0x00000003, /* Capture value set in GCCR.TCSS */ > + GCCR_LTO = 0x00000004, > + GCCR_LTI = 0x00000008, > + GCCR_LPTC = 0x00000010, > + GCCR_LMTT = 0x00000020, > + GCCR_TCSS = 0x00000300, > + GCCR_TCSS_GPTP = 0x00000000, /* gPTP timer value */ > + GCCR_TCSS_ADJGPTP = 0x00000100, /* Adjusted gPTP timer value */ > + GCCR_TCSS_AVTP = 0x00000200, /* AVTP presentation time value */ > +}; > + > +/* GTI */ > +enum GTI_BIT { > + GTI_TIV = 0x0FFFFFFF, > +}; > + > +/* GIC */ > +enum GIC_BIT { > + GIC_PTCE = 0x00000001, /* Undocumented? */ > + GIC_PTME = 0x00000004, > +}; > + > +/* GIS */ > +enum GIS_BIT { > + GIS_PTCF = 0x00000001, /* Undocumented? */ > + GIS_PTMF = 0x00000004, > +}; > + > +/* ECMR */ > +enum ECMR_BIT { > + ECMR_PRM = 0x00000001, > + ECMR_DM = 0x00000002, > + ECMR_TE = 0x00000020, > + ECMR_RE = 0x00000040, > + ECMR_MPDE = 0x00000200, > + ECMR_TXF = 0x00010000, /* Undocumented? */ > + ECMR_RXF = 0x00020000, > + ECMR_PFR = 0x00040000, > + ECMR_ZPF = 0x00080000, /* Undocumented? */ > + ECMR_RZPF = 0x00100000, > + ECMR_DPAD = 0x00200000, > + ECMR_RCSC = 0x00800000, > + ECMR_TRCCM = 0x04000000, > +}; > + > +/* ECSR */ > +enum ECSR_BIT { > + ECSR_ICD = 0x00000001, > + ECSR_MPD = 0x00000002, > + ECSR_LCHNG = 0x00000004, > + ECSR_PHYI = 0x00000008, > +}; > + > +/* ECSIPR */ > +enum ECSIPR_BIT { > + ECSIPR_ICDIP = 0x00000001, > + ECSIPR_MPDIP = 0x00000002, > + ECSIPR_LCHNGIP = 0x00000004, /* Undocumented? */ > +}; > + > +/* PIR */ > +enum PIR_BIT { > + PIR_MDC = 0x00000001, > + PIR_MMD = 0x00000002, > + PIR_MDO = 0x00000004, > + PIR_MDI = 0x00000008, > +}; > + > +/* PSR */ > +enum PSR_BIT { > + PSR_LMON = 0x00000001, > +}; > + > +/* PIPR */ > +enum PIPR_BIT { > + PIPR_PHYIP = 0x00000001, > +}; > + > +/* MPR */ > +enum MPR_BIT { > + MPR_MP = 0x0000ffff, > +}; > + > +/* GECMR */ > +enum GECMR_BIT { > + GECMR_SPEED = 0x00000001, > + GECMR_SPEED_100 = 0x00000000, > + GECMR_SPEED_1000 = 0x00000001, > +}; > + > +/* The Ethernet AVB descriptor definitions. */ > +enum DT { > + /* Frame data */ > + DT_FMID = 4, > + DT_FSTART = 5, > + DT_FEND = 6, > + DT_FSINGLE = 7, > + /* Chain control */ > + DT_LINK = 8, > + DT_LINKFIX = 9, > + DT_EOS = 10, > + /* HW/SW arbitration */ > + DT_FEMPTY = 12, > + DT_FEMPTY_IS = 13, > + DT_FEMPTY_IC = 14, > + DT_FEMPTY_ND = 15, > + DT_LEMPTY = 2, > + DT_EEMPTY = 3, > + /* 0, 1, 11 are reserved */ > +}; > + > +struct ravb_desc { > +#ifdef __LITTLE_ENDIAN > + u32 ds: 12; /* Descriptor size */ > + u32 cc: 12; /* Content control */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 dt: 4; /* Descriptor type */ > +#else > + u32 dt: 4; /* Descriptor type */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 cc: 12; /* Content control */ > + u32 ds: 12; /* Descriptor size */ > +#endif > + u32 dptr; /* Descriptor pointer */ > +}; > + > +struct ravb_rx_desc { > +#ifdef __LITTLE_ENDIAN > + u32 ds: 12; /* Descriptor size */ > + u32 ei: 1; /* Error indication */ > + u32 ps: 2; /* Padding selection */ > + u32 tr: 1; /* Truncation indication */ > + u32 msc: 8; /* MAC status code */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 dt: 4; /* Descriptor type */ > +#else > + u32 dt: 4; /* Descriptor type */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 msc: 8; /* MAC status code */ > + u32 ps: 2; /* Padding selection */ > + u32 ei: 1; /* Error indication */ > + u32 tr: 1; /* Truncation indication */ > + u32 ds: 12; /* Descriptor size */ > +#endif > + u32 dptr; /* Descpriptor pointer */ > +}; > + > +struct ravb_ex_rx_desc { > +#ifdef __LITTLE_ENDIAN > + u32 ds: 12; /* Descriptor size */ > + u32 ei: 1; /* Error indication */ > + u32 ps: 2; /* Padding selection */ > + u32 tr: 1; /* Truncation indication */ > + u32 msc: 8; /* MAC status code */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 dt: 4; /* Descriptor type */ > +#else > + u32 dt: 4; /* Descriptor type */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 msc: 8; /* MAC status code */ > + u32 ps: 2; /* Padding selection */ > + u32 ei: 1; /* Error indication */ > + u32 tr: 1; /* Truncation indication */ > + u32 ds: 12; /* Descriptor size */ > +#endif > + u32 dptr; /* Descpriptor pointer */ > + u32 ts_n; /* Timestampe nsec */ > + u32 ts_sl; /* Timestamp low */ > +#ifdef __LITTLE_ENDIAN > + u32 res: 16; /* Reserved bits */ > + u32 ts_sh: 16; /* Timestamp high */ > +#else > + u32 ts_sh: 16; /* Timestamp high */ > + u32 res: 16; /* Reserved bits */ > +#endif > +}; > + > +/* E-MAC status code */ > +enum MSC_BIT { > + MSC_CRC = 0x01, /* Frame CRC error */ > + MSC_RFE = 0x02, /* Frame reception error (flagged by PHY) */ > + MSC_RTSF = 0x04, /* Frame length error (frame too short) */ > + MSC_RTLF = 0x08, /* Frame length error (frame too long) */ > + MSC_FRE = 0x10, /* Fraction error (not a multiple of 8 bits) */ > + MSC_CRL = 0x20, /* Carrier lost */ > + MSC_CEEF = 0x40, /* Carrier extension error */ > + MSC_MC = 0x80, /* Multicast frame reception */ > +}; > + > +struct ravb_tx_desc { > +#ifdef __LITTLE_ENDIAN > + u32 ds: 12; /* Descriptor size */ > + u32 tag: 10; /* Frame tag */ > + u32 tsr: 1; /* Timestamp storage request */ > + u32 msc: 1; /* MAC status storage request */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 dt: 4; /* Descriptor type */ > +#else > + u32 dt: 4; /* Descriptor type */ > + u32 die: 4; /* Descriptor interrupt enable */ > + /* 0: disable, other: enable */ > + u32 msc: 1; /* MAC status storage request */ > + u32 tsr: 1; /* Timestamp storage request */ > + u32 tag: 10; /* Frame tag */ > + u32 ds: 12; /* Descriptor size */ > +#endif > + u32 dptr; /* Descpriptor pointer */ > +}; > + > +#define DBAT_ENTRY_NUM 22 > +#define RX_QUEUE_OFFSET 4 > +#define NUM_RX_QUEUE 2 > +#define NUM_TX_QUEUE 2 > + > +enum RAVB_QUEUE { > + RAVB_BE = 0, /* Best Effort Queue */ > + RAVB_NC, /* Network Control Queue */ > +}; > + > +struct ravb_tstamp_skb { > + struct list_head list; > + struct sk_buff *skb; > + u16 tag; > +}; > + > +struct ravb_ptp_perout { > + u32 target; > + u32 period; > +}; > + > +#define N_EXT_TS 1 > +#define N_PER_OUT 1 > + > +struct ravb_ptp { > + struct ptp_clock *clock; > + struct ptp_clock_info info; > + u32 default_addend; > + u32 current_addend; > + int extts[N_EXT_TS]; > + struct ravb_ptp_perout perout[N_PER_OUT]; > +}; > + > +struct ravb_private { > + struct net_device *ndev; > + struct platform_device *pdev; > + void __iomem *addr; > + struct mdiobb_ctrl mdiobb; > + u32 num_rx_ring[NUM_RX_QUEUE]; > + u32 num_tx_ring[NUM_TX_QUEUE]; > + u32 desc_bat_size; > + dma_addr_t desc_bat_dma; > + struct ravb_desc *desc_bat; > + dma_addr_t rx_desc_dma[NUM_RX_QUEUE]; > + dma_addr_t tx_desc_dma[NUM_TX_QUEUE]; > + struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE]; > + struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE]; > + struct sk_buff **rx_skb[NUM_RX_QUEUE]; > + struct sk_buff **tx_skb[NUM_TX_QUEUE]; > + void **tx_buffers[NUM_TX_QUEUE]; > + u32 rx_over_errors; > + u32 rx_fifo_errors; > + struct net_device_stats stats[NUM_RX_QUEUE]; > + u32 tstamp_tx_ctrl; > + u32 tstamp_rx_ctrl; > + struct list_head ts_skb_list; > + u32 ts_skb_tag; > + struct ravb_ptp ptp; > + spinlock_t lock; /* Register access lock */ > + u32 cur_rx[NUM_RX_QUEUE]; /* Consumer ring indices */ > + u32 dirty_rx[NUM_RX_QUEUE]; /* Producer ring indices */ > + u32 cur_tx[NUM_TX_QUEUE]; > + u32 dirty_tx[NUM_TX_QUEUE]; > + u32 rx_buffer_size; /* Based on MTU+slack. */ > + int edmac_endian; > + struct napi_struct napi; > + /* MII transceiver section. */ > + struct mii_bus *mii_bus; /* MDIO bus control */ > + struct phy_device *phydev; /* PHY device control */ > + int link; > + phy_interface_t phy_interface; > + int msg_enable; > + int speed; > + int duplex; > + > + unsigned no_avb_link:1; > + unsigned avb_link_active_low:1; > +}; > + > +#define RAVB_DEF_MSG_ENABLE \ > + (NETIF_MSG_LINK | \ > + NETIF_MSG_TIMER | \ > + NETIF_MSG_RX_ERR | \ > + NETIF_MSG_TX_ERR) > + > +static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + return ioread32(priv->addr + reg); > +} > + > +static inline void ravb_write(struct net_device *ndev, u32 data, > + enum ravb_reg reg) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + iowrite32(data, priv->addr + reg); > +} > + > +/* There is CPU dependent code */ > +static int ravb_wait_clear(struct net_device *ndev, u16 reg, u32 bits) > +{ > + int i; > + > + for (i = 0; i < 100; i++) { > + if (!(ravb_read(ndev, reg) & bits)) > + break; > + mdelay(1); > + } > + if (i >= 100) > + return -ETIMEDOUT; > + > + return 0; > +} > + > +static int ravb_wait_setting(struct net_device *ndev, u16 reg, u32 bits) > +{ This function is identical to the previous one. > + int i; > + > + for (i = 0; i < 100; i++) { > + if (ravb_read(ndev, reg) & bits) > + break; > + mdelay(1); > + } > + if (i >= 100) > + return -ETIMEDOUT; > + > + return 0; > +} > + > +static int ravb_reset(struct net_device *ndev) > +{ > + int result; > + > + /* set config mode */ > + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, > + CCC); > + /* check the operating mode is changed to the config mode */ > + result = ravb_wait_setting(ndev, CSR, CSR_OPS_CONFIG); > + if (result < 0) > + netdev_err(ndev, "Device reset failed\n"); > + > + return result; > +} > + > +static void ravb_set_duplex(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + if (priv->duplex) /* Full */ > + ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_DM, ECMR); > + else /* Half */ > + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_DM, ECMR); > +} > + > +static void ravb_set_rate(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + switch (priv->speed) { > + case 100: /* 100BASE */ > + ravb_write(ndev, GECMR_SPEED_100, GECMR); > + break; > + case 1000: /* 1000BASE */ > + ravb_write(ndev, GECMR_SPEED_1000, GECMR); > + break; > + default: > + break; > + } > +} > + > +static void ravb_set_buffer_align(struct sk_buff *skb) > +{ > + u32 reserve = (u32)skb->data & (RAVB_ALIGN - 1); > + > + if (reserve) > + skb_reserve(skb, RAVB_ALIGN - reserve); > +} > + > +/* Program the hardware MAC address from dev->dev_addr. */ > +static void update_mac_address(struct net_device *ndev) > +{ > + ravb_write(ndev, > + (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) | > + (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR); > + ravb_write(ndev, > + (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR); > +} > + > +/* Get MAC address from the MAC address registers > + * > + * Ethernet AVB device doesn't have ROM for MAC address. > + * This function gets the MAC address that was used by a bootloader. > + */ > +static void read_mac_address(struct net_device *ndev, const u8 *mac) > +{ > + if (mac) { > + ether_addr_copy(ndev->dev_addr, mac); > + } else { > + ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24); > + ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF; > + ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF; > + ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF; > + ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF; > + ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF; > + } > +} > + > +static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set) > +{ > + struct ravb_private *priv = container_of(ctrl, struct ravb_private, > + mdiobb); > + u32 pir = ravb_read(priv->ndev, PIR); > + > + if (set) > + pir |= mask; > + else > + pir &= ~mask; > + ravb_write(priv->ndev, pir, PIR); > +} > + > +/* MDC pin control */ > +static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level) > +{ > + ravb_mdio_ctrl(ctrl, PIR_MDC, level); > +} > + > +/* Data I/O pin control */ > +static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output) > +{ > + ravb_mdio_ctrl(ctrl, PIR_MMD, output); > +} > + > +/* Set data bit */ > +static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value) > +{ > + ravb_mdio_ctrl(ctrl, PIR_MDO, value); > +} > + > +/* Get data bit */ > +static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl) > +{ > + struct ravb_private *priv = container_of(ctrl, struct ravb_private, > + mdiobb); > + > + return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0; > +} > + > +/* MDIO bus control struct */ > +static struct mdiobb_ops bb_ops = { > + .owner = THIS_MODULE, > + .set_mdc = ravb_set_mdc, > + .set_mdio_dir = ravb_set_mdio_dir, > + .set_mdio_data = ravb_set_mdio_data, > + .get_mdio_data = ravb_get_mdio_data, > +}; > + > +/* Free skb and buffers for Ethernet AVB */ > +static void ravb_ring_free(struct net_device *ndev, int q) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int i; > + > + /* Free RX skb ringbuffer */ > + if (priv->rx_skb[q]) { > + for (i = 0; i < priv->num_rx_ring[q]; i++) > + dev_kfree_skb(priv->rx_skb[q][i]); > + } > + kfree(priv->rx_skb[q]); > + priv->rx_skb[q] = NULL; > + > + /* Free TX skb ringbuffer */ > + if (priv->tx_skb[q]) { > + for (i = 0; i < priv->num_tx_ring[q]; i++) > + dev_kfree_skb(priv->tx_skb[q][i]); > + } > + kfree(priv->tx_skb[q]); > + priv->tx_skb[q] = NULL; > + > + /* Free aligned TX buffers */ > + if (priv->tx_buffers[q]) { > + for (i = 0; i < priv->num_tx_ring[q]; i++) > + kfree(priv->tx_buffers[q][i]); > + } > + kfree(priv->tx_buffers[q]); > + priv->tx_buffers[q] = NULL; > +} > + > +/* Format skb and descriptor buffer for Ethernet AVB */ > +static void ravb_ring_format(struct net_device *ndev, int q) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct ravb_ex_rx_desc *rx_desc = NULL; > + struct ravb_tx_desc *tx_desc = NULL; > + struct ravb_desc *desc = NULL; > + int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q]; > + int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q]; > + int buffer_size = priv->rx_buffer_size + RAVB_ALIGN - 1; > + struct sk_buff *skb; > + dma_addr_t dma_addr; > + void *buffer; > + int i; > + > + priv->cur_rx[q] = 0; > + priv->cur_tx[q] = 0; > + priv->dirty_rx[q] = 0; > + priv->dirty_tx[q] = 0; > + memset(priv->rx_ring[q], 0, rx_ring_size); > + /* Build RX ring buffer */ > + for (i = 0; i < priv->num_rx_ring[q]; i++) { > + priv->rx_skb[q][i] = NULL; > + skb = netdev_alloc_skb(ndev, buffer_size); > + if (!skb) > + break; > + ravb_set_buffer_align(skb); > + /* RX descriptor */ > + rx_desc = &priv->rx_ring[q][i]; > + /* The size of the buffer should be on 16-byte boundary. */ > + rx_desc->ds = ALIGN(priv->rx_buffer_size, 16); > + dma_addr = dma_map_single(&ndev->dev, skb->data, rx_desc->ds, > + DMA_FROM_DEVICE); > + if (dma_mapping_error(&ndev->dev, dma_addr)) { > + dev_kfree_skb(skb); > + break; > + } > + priv->rx_skb[q][i] = skb; > + rx_desc->dptr = dma_addr; > + rx_desc->dt = DT_FEMPTY; > + } > + rx_desc = &priv->rx_ring[q][i]; > + rx_desc->dptr = (u32)priv->rx_desc_dma[q]; > + rx_desc->dt = DT_LINKFIX; /* type */ > + priv->dirty_rx[q] = (u32)(i - priv->num_rx_ring[q]); > + > + memset(priv->tx_ring[q], 0, tx_ring_size); > + /* Build TX ring buffer */ > + for (i = 0; i < priv->num_tx_ring[q]; i++) { > + priv->tx_skb[q][i] = NULL; > + priv->tx_buffers[q][i] = NULL; > + buffer = kmalloc(buffer_size, GFP_ATOMIC); > + if (!buffer) > + break; > + /* Aligned TX buffer */ > + priv->tx_buffers[q][i] = buffer; > + tx_desc = &priv->tx_ring[q][i]; > + tx_desc->dt = DT_EEMPTY; > + } > + tx_desc = &priv->tx_ring[q][i]; > + tx_desc->dptr = (u32)priv->tx_desc_dma[q]; > + tx_desc->dt = DT_LINKFIX; /* type */ > + > + /* RX descriptor base address for best effort */ > + desc = &priv->desc_bat[RX_QUEUE_OFFSET + q]; > + desc->dt = DT_LINKFIX; /* type */ > + desc->dptr = (u32)priv->rx_desc_dma[q]; > + > + /* TX descriptor base address for best effort */ > + desc = &priv->desc_bat[q]; > + desc->dt = DT_LINKFIX; /* type */ > + desc->dptr = (u32)priv->tx_desc_dma[q]; > +} > + > +/* Init skb and descriptor buffer for Ethernet AVB */ > +static int ravb_ring_init(struct net_device *ndev, int q) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int rx_ring_size = 0, tx_ring_size; > + > + /* Allocate RX and TX skb rings */ > + priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q], > + sizeof(*priv->rx_skb[q]), GFP_KERNEL); > + priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q], > + sizeof(*priv->tx_skb[q]), GFP_KERNEL); > + if (!priv->rx_skb[q] || !priv->tx_skb[q]) > + goto skb_ring_free; > + > + /* Allocate rings for the aligned buffers */ > + priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q], > + sizeof(*priv->tx_buffers[q]), GFP_KERNEL); > + if (!priv->tx_buffers[q]) > + goto skb_ring_free; > + > + /* Allocate all RX descriptors. */ > + rx_ring_size = sizeof(struct ravb_ex_rx_desc) * > + (priv->num_rx_ring[q] + 1); > + priv->rx_ring[q] = dma_alloc_coherent(NULL, rx_ring_size, > + &priv->rx_desc_dma[q], > + GFP_KERNEL); > + if (!priv->rx_ring[q]) > + goto skb_ring_free; > + > + priv->dirty_rx[q] = 0; > + > + /* Allocate all TX descriptors. */ > + tx_ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1); > + priv->tx_ring[q] = dma_alloc_coherent(NULL, tx_ring_size, > + &priv->tx_desc_dma[q], > + GFP_KERNEL); > + if (!priv->tx_ring[q]) > + goto desc_ring_free; > + > + return 0; > + > +desc_ring_free: > + /* Free DMA buffer */ > + dma_free_coherent(NULL, rx_ring_size, > + priv->rx_ring[q], priv->rx_desc_dma[q]); > + > +skb_ring_free: > + /* Free RX and TX skb ring buffer */ > + ravb_ring_free(ndev, q); > + priv->tx_ring[q] = NULL; > + priv->rx_ring[q] = NULL; > + > + return -ENOMEM; > +} > + > +static void ravb_free_dma_buffer(struct ravb_private *priv) > +{ > + int ring_size; > + int q; > + > + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { > + if (priv->rx_ring[q]) { > + ring_size = sizeof(struct ravb_ex_rx_desc) * > + (priv->num_rx_ring[q] + 1); > + dma_free_coherent(NULL, ring_size, priv->rx_ring[q], > + priv->rx_desc_dma[q]); > + priv->rx_ring[q] = NULL; > + } > + } > + > + for (q = RAVB_BE; q < NUM_TX_QUEUE; q++) { > + if (priv->tx_ring[q]) { > + ring_size = sizeof(struct ravb_tx_desc) * > + (priv->num_tx_ring[q] + 1); > + dma_free_coherent(NULL, ring_size, priv->tx_ring[q], > + priv->tx_desc_dma[q]); > + priv->tx_ring[q] = NULL; > + } > + } > +} > + > +/* E-MAC init function */ > +static void ravb_mac_init(struct net_device *ndev, bool start) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + u32 val; > + > + /* Receive frame limit set register */ > + ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR); > + > + /* PAUSE prohibition */ > + val = (ravb_read(ndev, ECMR) & ECMR_DM) | ECMR_ZPF | > + (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; > + > + ravb_write(ndev, val, ECMR); > + > + ravb_set_rate(ndev); > + > + /* Set MAC address */ > + update_mac_address(ndev); > + > + ravb_write(ndev, 1, MPR); > + > + /* E-MAC status register clear */ > + ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR); > + > + /* E-MAC interrupt enable register */ > + if (start) { > + ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, > + ECSIPR); > + netif_start_queue(ndev); > + } > +} > + > +/* Device init function for Ethernet AVB */ > +static int ravb_dmac_init(struct net_device *ndev, bool start) > +{ > + int result; > + > + /* Set CONFIG mode */ > + result = ravb_reset(ndev); > + if (result) > + return result; > + > + /* Descriptor format */ > + ravb_ring_format(ndev, RAVB_BE); > + ravb_ring_format(ndev, RAVB_NC); > + > + /* Disable all interrupts */ > + ravb_write(ndev, 0, RIC0); > + ravb_write(ndev, 0, RIC1); > + ravb_write(ndev, 0, RIC2); > + ravb_write(ndev, 0, TIC); > + > +#if defined(__LITTLE_ENDIAN) > + ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC); > +#else > + ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC); > +#endif > + > + /* Set AVB RX */ > + ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | 0x18000000, RCR); > + > + /* Set FIFO size */ > + ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00222200, TGC); > + > + /* Timestamp enable */ > + ravb_write(ndev, TCCR_TFEN, TCCR); > + > + /* Interrupt enable */ > + if (start) { > + /* Frame receive */ > + ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0); > + /* Receive FIFO full warning */ > + ravb_write(ndev, RIC1_RFWE, RIC1); > + /* Receive FIFO full error, descriptor empty */ > + ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2); > + /* Frame transmited, timestamp FIFO updated */ > + ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC); > + > + /* Setting the control will start the AVB-DMAC process. */ > + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | > + CCC_OPC_OPERATION, CCC); > + netif_start_queue(ndev); > + } > + > + return 0; > +} > + > +/* Free TX skb function for AVB-IP */ > +static int ravb_tx_free(struct net_device *ndev, int q) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct net_device_stats *stats = &priv->stats[q]; > + struct ravb_tx_desc *desc; > + int free_num = 0; > + int entry = 0; > + > + for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) { > + entry = priv->dirty_tx[q] % priv->num_tx_ring[q]; > + desc = &priv->tx_ring[q][entry]; > + if (desc->dt != DT_FEMPTY) > + break; > + > + /* Free the original skb. */ > + if (priv->tx_skb[q][entry]) { > + dma_unmap_single(&ndev->dev, desc->dptr, desc->ds, > + DMA_TO_DEVICE); > + dev_kfree_skb_any(priv->tx_skb[q][entry]); > + priv->tx_skb[q][entry] = NULL; > + free_num++; > + } > + stats->tx_packets++; > + stats->tx_bytes += desc->ds; > + desc->dt = DT_EEMPTY; > + } > + return free_num; > +} > + > +static void ravb_get_tx_tstamp(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct ravb_tstamp_skb *ts_skb, *ts_skb1; > + struct skb_shared_hwtstamps shhwtstamps; > + struct sk_buff *skb; > + struct timespec ts; For new drivers, please use timespec64. > + u16 tag, tfa_tag; > + int count; > + u32 tfa2; > + > + count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8; > + while (count--) { > + tfa2 = ravb_read(ndev, TFA2); > + tfa_tag = (tfa2 & TFA2_TST) >> 16; > + ts.tv_nsec = (u64)ravb_read(ndev, TFA0); > + ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) | > + ravb_read(ndev, TFA1); > + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); > + shhwtstamps.hwtstamp = timespec_to_ktime(ts); > + list_for_each_entry_safe(ts_skb, > + ts_skb1, &priv->ts_skb_list, list) { > + skb = ts_skb->skb; > + tag = ts_skb->tag; > + list_del(&ts_skb->list); > + kfree(ts_skb); > + if (tag == tfa_tag) { > + skb_tstamp_tx(skb, &shhwtstamps); > + break; > + } > + } > + ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR); > + } > +} > + > +/* Packet receive function for Ethernet AVB */ > +static int ravb_rx(struct net_device *ndev, u32 ris0, int *quota, int q) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int entry = priv->cur_rx[q] % priv->num_rx_ring[q]; > + int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) - > + priv->cur_rx[q]; > + struct net_device_stats *stats = &priv->stats[q]; > + int skb_size = priv->rx_buffer_size + RAVB_ALIGN - 1; > + struct ravb_ex_rx_desc *desc; > + struct sk_buff *skb; > + dma_addr_t dma_addr; > + struct timespec ts; timespec64 > + u16 pkt_len = 0; > + u8 desc_status; > + int limit; > + > + if (quota) > + boguscnt = min(boguscnt, *quota); > + limit = boguscnt; > + desc = &priv->rx_ring[q][entry]; > + while (desc->dt != DT_FEMPTY) { > + desc_status = desc->msc; > + pkt_len = desc->ds; > + > + if (--boguscnt < 0) > + break; > + > + if (desc_status & MSC_MC) > + stats->multicast++; > + > + if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | > + MSC_CEEF)) { > + stats->rx_errors++; > + if (desc_status & MSC_CRC) > + stats->rx_crc_errors++; > + if (desc_status & MSC_RFE) > + stats->rx_frame_errors++; > + if (desc_status & (MSC_RTLF | MSC_RTSF)) > + stats->rx_length_errors++; > + if (desc_status & MSC_CEEF) > + stats->rx_missed_errors++; > + } else { > + u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE; > + > + skb = priv->rx_skb[q][entry]; > + priv->rx_skb[q][entry] = NULL; > + dma_sync_single_for_cpu(&ndev->dev, desc->dptr, > + ALIGN(priv->rx_buffer_size, 16), > + DMA_FROM_DEVICE); > + get_ts &= (q == RAVB_NC) ? > + RAVB_RXTSTAMP_TYPE_V2_L2_EVENT : > + ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; > + if (get_ts) { > + struct skb_shared_hwtstamps *shhwtstamps; > + > + shhwtstamps = skb_hwtstamps(skb); > + memset(shhwtstamps, 0, sizeof(*shhwtstamps)); > + ts.tv_sec = ((u64)desc->ts_sh << 32) | > + desc->ts_sl; > + ts.tv_nsec = (u64)desc->ts_n; > + shhwtstamps->hwtstamp = timespec_to_ktime(ts); > + } > + skb_put(skb, pkt_len); > + skb->protocol = eth_type_trans(skb, ndev); > + if (q == RAVB_NC) > + netif_rx(skb); > + else > + netif_receive_skb(skb); > + stats->rx_packets++; > + stats->rx_bytes += pkt_len; > + } > + > + entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; > + desc = &priv->rx_ring[q][entry]; > + } > + > + /* Refill the RX ring buffers. */ > + for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { > + entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; > + desc = &priv->rx_ring[q][entry]; > + /* The size of the buffer should be on 16-byte boundary. */ > + desc->ds = ALIGN(priv->rx_buffer_size, 16); > + > + if (!priv->rx_skb[q][entry]) { > + skb = netdev_alloc_skb(ndev, skb_size); > + if (!skb) > + break; /* Better luck next round. */ > + ravb_set_buffer_align(skb); > + dma_unmap_single(&ndev->dev, desc->dptr, desc->ds, > + DMA_FROM_DEVICE); > + dma_addr = dma_map_single(&ndev->dev, skb->data, > + desc->ds, DMA_FROM_DEVICE); > + skb_checksum_none_assert(skb); > + if (dma_mapping_error(&ndev->dev, dma_addr)) { > + dev_kfree_skb_any(skb); > + break; > + } > + desc->dptr = dma_addr; > + priv->rx_skb[q][entry] = skb; > + } > + desc->dt = DT_FEMPTY; > + } > + > + if (quota) > + *quota -= limit - (++boguscnt); > + > + return boguscnt <= 0; > +} > + > +static void ravb_rcv_snd_disable(struct net_device *ndev) > +{ > + /* Disable TX and RX */ > + ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR); > +} > + > +static void ravb_rcv_snd_enable(struct net_device *ndev) > +{ > + /* Enable TX and RX */ > + ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR); > +} > + > +/* function for waiting dma process finished */ > +static void ravb_wait_stop_dma(struct net_device *ndev) > +{ > + /* Wait for stopping the hardware TX process */ > + ravb_wait_clear(ndev, TCCR, > + TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3); > + > + ravb_wait_clear(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3); > + > + /* Stop the E-MAC's RX processes. */ > + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_RE, ECMR); > + > + /* Wait for stopping the RX DMA process */ > + ravb_wait_clear(ndev, CSR, CSR_RPO); > +} > + > +/* Caller must hold the lock */ > +static void ravb_ptp_update_compare(struct ravb_private *priv, u32 ns) > +{ > + struct net_device *ndev = priv->ndev; > + /* When the comparison value (GPTC.PTCV) is in range of > + * [x-1 to x+1] (x is the configured increment value in > + * GTI.TIV), it may happen that a comparison match is > + * not detected when the timer wraps around. > + */ What does this funtion do, exactly? This looks very fishy to me. > + u32 gti_ns_plus_1 = (priv->ptp.current_addend >> 20) + 1; > + > + if (ns < gti_ns_plus_1) > + ns = gti_ns_plus_1; > + else if (ns > 0 - gti_ns_plus_1) > + ns = 0 - gti_ns_plus_1; > + > + ravb_write(ndev, ns, GPTC); > + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LPTC, GCCR); > + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) > + while (ravb_read(ndev, GCCR) & GCCR_LPTC) > + ; Infinite loop while holding a spin lock = not good. > +} > + > +/* E-MAC interrupt handler */ > +static void ravb_emac_interrupt(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + u32 ecsr, psr; > + > + ecsr = ravb_read(ndev, ECSR); > + ravb_write(ndev, ecsr, ECSR); /* clear interrupt */ > + if (ecsr & ECSR_ICD) > + ndev->stats.tx_carrier_errors++; > + if (ecsr & ECSR_LCHNG) { > + /* Link changed */ > + if (priv->no_avb_link) > + return; > + psr = ravb_read(ndev, PSR); > + if (priv->avb_link_active_low) > + psr ^= PSR_LMON; > + if (!(psr & PSR_LMON)) { > + /* DIsable RX and TX */ > + ravb_rcv_snd_disable(ndev); > + } else { > + /* Enable RX and TX */ > + ravb_rcv_snd_enable(ndev); > + } > + } > +} > + > +/* Error interrupt handler */ > +static void ravb_error_interrupt(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + u32 eis, ris2; > + > + eis = ravb_read(ndev, EIS); > + ravb_write(ndev, ~EIS_QFS, EIS); > + if (eis & EIS_QFS) { > + ris2 = ravb_read(ndev, RIS2); > + ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF), RIS2); > + > + /* Receive Descriptor Empty int */ > + if (ris2 & RIS2_QFF0) > + priv->stats[RAVB_BE].rx_over_errors++; > + > + /* Receive Descriptor Empty int */ > + if (ris2 & RIS2_QFF1) > + priv->stats[RAVB_NC].rx_over_errors++; > + > + /* Receive FIFO Overflow int */ > + if (ris2 & RIS2_RFFF) > + priv->rx_fifo_errors++; > + } > +} > + > +static irqreturn_t ravb_interrupt(int irq, void *dev_id) > +{ > + struct net_device *ndev = dev_id; > + struct ravb_private *priv = netdev_priv(ndev); > + irqreturn_t result = IRQ_NONE; > + u32 iss; > + > + spin_lock(&priv->lock); > + /* Get interrupt status */ > + iss = ravb_read(ndev, ISS); > + > + /* Received and transmited interrupts */ > + if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) { > + u32 ris0, ric0, tic, tis; > + > + ris0 = ravb_read(ndev, RIS0); > + ric0 = ravb_read(ndev, RIC0); > + tis = ravb_read(ndev, TIS); > + tic = ravb_read(ndev, TIC); > + ravb_write(ndev, ~(TIS_FTF1 | TIS_TFUF), TIS); > + > + /* Received network control queue */ > + if (ris0 & RIS0_FRF1) { > + ravb_write(ndev, ~RIS0_FRF1, RIS0); > + /* Timestamp of network control packets that is based > + * on IEEE802.1AS, is used time synchronization of PTP. > + * It should not be handled by NAPI scheduling, because > + * it needs to be received as soon as possible. > + */ > + ravb_rx(ndev, ris0, NULL, RAVB_NC); > + result = IRQ_HANDLED; > + } > + > + /* Timestamp updated */ > + if (tis & TIS_TFUF) { > + ravb_get_tx_tstamp(ndev); > + result = IRQ_HANDLED; > + } > + > + /* Transmited network control queue */ > + if (tis & TIS_FTF1) { > + ravb_tx_free(ndev, RAVB_NC); > + netif_wake_queue(ndev); > + result = IRQ_HANDLED; > + } > + > + /* Received and transmited best effort queue */ > + if (((ris0 & ric0) & RIS0_FRF0) || ((tis & tic) & TIS_FTF0)) { > + if (napi_schedule_prep(&priv->napi)) { > + /* Mask RX and TX interrupts */ > + ravb_write(ndev, ric0 & ~RIC0_FRE0, RIC0); > + ravb_write(ndev, tic & ~TIC_FTE0, TIC); > + __napi_schedule(&priv->napi); > + } else { > + netdev_warn(ndev, > + "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n", > + ris0, ric0); > + netdev_warn(ndev, > + " tx status 0x%08x, tx mask 0x%08x.\n", > + tis, tic); > + } > + result = IRQ_HANDLED; > + } > + } > + > + /* E-MAC status summary */ > + if (iss & ISS_MS) { > + ravb_emac_interrupt(ndev); > + result = IRQ_HANDLED; > + } > + > + /* Error status summary */ > + if (iss & ISS_ES) { > + ravb_error_interrupt(ndev); > + result = IRQ_HANDLED; > + } > + > + if (iss & ISS_CGIS) { > + u32 gis = ravb_read(ndev, GIS); > + > + gis &= ravb_read(ndev, GIC); > + if (gis & GIS_PTCF) { > + struct ptp_clock_event event; > + > + event.type = PTP_CLOCK_EXTTS; > + event.index = 0; > + event.timestamp = ravb_read(ndev, GCPT); > + ptp_clock_event(priv->ptp.clock, &event); > + } > + if (gis & GIS_PTMF) { > + struct ravb_ptp_perout *perout = priv->ptp.perout; > + > + if (perout->period) { > + perout->target += perout->period; > + ravb_ptp_update_compare(priv, perout->target); Infinite loop in an interrupt handler. Brilliant. > + } > + } > + > + if (gis) { > + ravb_write(ndev, ~gis, GIS); > + result = IRQ_HANDLED; > + } > + } > + > + spin_unlock(&priv->lock); > + return result; > +} > + > +static int ravb_poll(struct napi_struct *napi, int budget) > +{ > + struct ravb_private *priv = container_of(napi, struct ravb_private, > + napi); > + struct net_device *ndev = napi->dev; > + unsigned long flags; > + int quota = budget; > + u32 ris0, tis; > + > + for (;;) { > + tis = ravb_read(ndev, TIS); > + ris0 = ravb_read(ndev, RIS0); > + if (!((ris0 & RIS0_FRF0) || (tis & TIS_FTF0))) > + break; > + > + /* Processing RX Descriptor Ring */ > + if ((ris0 & RIS0_FRF0)) { > + /* Clear RX interrupt */ > + ravb_write(ndev, ~RIS0_FRF0, RIS0); > + if (ravb_rx(ndev, ris0, &quota, RAVB_BE)) > + goto out; > + } > + /* Processing TX Descriptor Ring */ > + if (tis & TIS_FTF0) { > + /* Clear TX interrupt */ > + ravb_write(ndev, ~TIS_FTF0, TIS); > + spin_lock_irqsave(&priv->lock, flags); > + ravb_tx_free(ndev, RAVB_BE); > + if (netif_queue_stopped(ndev)) > + netif_wake_queue(ndev); > + spin_unlock_irqrestore(&priv->lock, flags); > + } > + } > + > + napi_complete(napi); > + > + /* Re-enable RX interrupts */ > + spin_lock_irqsave(&priv->lock, flags); > + ravb_write(ndev, ravb_read(ndev, RIC0) | RIC0_FRE0, RIC0); > + ravb_write(ndev, ravb_read(ndev, TIC) | TIC_FTE0, TIC); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + /* Receive error message handling */ > + priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors; > + priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors; > + if (priv->rx_over_errors != ndev->stats.rx_over_errors) { > + ndev->stats.rx_over_errors = priv->rx_over_errors; > + netif_err(priv, rx_err, ndev, "Receive Descriptor Empty\n"); > + } > + if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors) { > + ndev->stats.rx_fifo_errors = priv->rx_fifo_errors; > + netif_err(priv, rx_err, ndev, "Receive FIFO Overflow\n"); > + } > +out: > + return budget - quota; > +} > + > +/* PHY state control function */ > +static void ravb_adjust_link(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct phy_device *phydev = priv->phydev; > + int new_state = 0; > + > + if (phydev->link) { > + if (phydev->duplex != priv->duplex) { > + new_state = 1; > + priv->duplex = phydev->duplex; > + ravb_set_duplex(ndev); > + } > + > + if (phydev->speed != priv->speed) { > + new_state = 1; > + priv->speed = phydev->speed; > + ravb_set_rate(ndev); > + } > + if (!priv->link) { > + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF, > + ECMR); > + new_state = 1; > + priv->link = phydev->link; > + if (priv->no_avb_link) > + ravb_rcv_snd_enable(ndev); > + } > + } else if (priv->link) { > + new_state = 1; > + priv->link = 0; > + priv->speed = 0; > + priv->duplex = -1; > + if (priv->no_avb_link) > + ravb_rcv_snd_disable(ndev); > + } > + > + if (new_state && netif_msg_link(priv)) > + phy_print_status(phydev); > +} > + > +/* PHY init function */ > +static int ravb_phy_init(struct net_device *ndev) > +{ > + struct device_node *np = ndev->dev.parent->of_node; > + struct ravb_private *priv = netdev_priv(ndev); > + struct phy_device *phydev; > + struct device_node *pn; > + > + priv->link = 0; > + priv->speed = 0; > + priv->duplex = -1; > + > + /* Try connecting to PHY */ > + pn = of_parse_phandle(np, "phy-handle", 0); > + phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, > + priv->phy_interface); > + if (!phydev) { > + netdev_err(ndev, "failed to connect PHY\n"); > + return -ENOENT; > + } > + > + netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n", > + phydev->addr, phydev->irq, phydev->drv->name); > + > + priv->phydev = phydev; > + > + return 0; > +} > + > +/* PHY control start function */ > +static int ravb_phy_start(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int result; > + > + result = ravb_phy_init(ndev); > + if (result) > + return result; > + > + phy_start(priv->phydev); > + > + return 0; > +} > + > +static int ravb_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + unsigned long flags; > + int result = -ENODEV; > + > + if (priv->phydev) { > + spin_lock_irqsave(&priv->lock, flags); > + result = phy_ethtool_gset(priv->phydev, ecmd); > + spin_unlock_irqrestore(&priv->lock, flags); > + } > + > + return result; > +} > + > +static int ravb_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + unsigned long flags; > + int result; > + > + if (!priv->phydev) > + return -ENODEV; > + > + spin_lock_irqsave(&priv->lock, flags); > + > + /* Disable TX and RX */ > + ravb_rcv_snd_disable(ndev); > + > + result = phy_ethtool_sset(priv->phydev, ecmd); > + if (result) > + goto error_exit; > + > + if (ecmd->duplex == DUPLEX_FULL) > + priv->duplex = 1; > + else > + priv->duplex = 0; > + > + ravb_set_duplex(ndev); > + > +error_exit: > + mdelay(1); > + > + /* Enable TX and RX */ > + ravb_rcv_snd_enable(ndev); > + > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return result; > +} > + > +static int ravb_nway_reset(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int result = -ENODEV; > + unsigned long flags; > + > + if (priv->phydev) { > + spin_lock_irqsave(&priv->lock, flags); > + result = phy_start_aneg(priv->phydev); > + spin_unlock_irqrestore(&priv->lock, flags); > + } > + > + return result; > +} > + > +static u32 ravb_get_msglevel(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + return priv->msg_enable; > +} > + > +static void ravb_set_msglevel(struct net_device *ndev, u32 value) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + priv->msg_enable = value; > +} > + > +static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = { > + "rx_queue_0_current", > + "tx_queue_0_current", > + "rx_queue_0_dirty", > + "tx_queue_0_dirty", > + "rx_queue_0_packets", > + "tx_queue_0_packets", > + "rx_queue_0_bytes", > + "tx_queue_0_bytes", > + "rx_queue_0_mcast_packets", > + "rx_queue_0_errors", > + "rx_queue_0_crc_errors", > + "rx_queue_0_frame_errors", > + "rx_queue_0_length_errors", > + "rx_queue_0_missed_errors", > + "rx_queue_0_over_errors", > + > + "rx_queue_1_current", > + "tx_queue_1_current", > + "rx_queue_1_dirty", > + "tx_queue_1_dirty", > + "rx_queue_1_packets", > + "tx_queue_1_packets", > + "rx_queue_1_bytes", > + "tx_queue_1_bytes", > + "rx_queue_1_mcast_packets", > + "rx_queue_1_errors", > + "rx_queue_1_crc_errors", > + "rx_queue_1_frame_errors_", > + "rx_queue_1_length_errors", > + "rx_queue_1_missed_errors", > + "rx_queue_1_over_errors", > +}; > + > +#define RAVB_STATS_LEN ARRAY_SIZE(ravb_gstrings_stats) > + > +static int ravb_get_sset_count(struct net_device *netdev, int sset) > +{ > + switch (sset) { > + case ETH_SS_STATS: > + return RAVB_STATS_LEN; > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static void ravb_get_ethtool_stats(struct net_device *ndev, > + struct ethtool_stats *stats, u64 *data) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int i = 0; > + int q; > + > + /* Device-specific stats */ > + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { > + struct net_device_stats *stats = &priv->stats[q]; > + > + data[i++] = priv->cur_rx[q]; > + data[i++] = priv->cur_tx[q]; > + data[i++] = priv->dirty_rx[q]; > + data[i++] = priv->dirty_tx[q]; > + data[i++] = stats->rx_packets; > + data[i++] = stats->tx_packets; > + data[i++] = stats->rx_bytes; > + data[i++] = stats->tx_bytes; > + data[i++] = stats->multicast; > + data[i++] = stats->rx_errors; > + data[i++] = stats->rx_crc_errors; > + data[i++] = stats->rx_frame_errors; > + data[i++] = stats->rx_length_errors; > + data[i++] = stats->rx_missed_errors; > + data[i++] = stats->rx_over_errors; > + } > +} > + > +static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data) > +{ > + switch (stringset) { > + case ETH_SS_STATS: > + memcpy(data, *ravb_gstrings_stats, sizeof(ravb_gstrings_stats)); > + break; > + } > +} > + > +static void ravb_get_ringparam(struct net_device *ndev, > + struct ethtool_ringparam *ring) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + ring->rx_max_pending = BE_RX_RING_MAX; > + ring->tx_max_pending = BE_TX_RING_MAX; > + ring->rx_pending = priv->num_rx_ring[RAVB_BE]; > + ring->tx_pending = priv->num_tx_ring[RAVB_BE]; > +} > + > +static int ravb_set_ringparam(struct net_device *ndev, > + struct ethtool_ringparam *ring) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int result; > + > + if (ring->tx_pending > BE_TX_RING_MAX || > + ring->rx_pending > BE_RX_RING_MAX || > + ring->tx_pending < BE_TX_RING_MIN || > + ring->rx_pending < BE_RX_RING_MIN) > + return -EINVAL; > + if (ring->rx_mini_pending || ring->rx_jumbo_pending) > + return -EINVAL; > + > + if (netif_running(ndev)) { > + netif_tx_disable(ndev); > + /* Wait for DMA stopping */ > + ravb_wait_stop_dma(ndev); > + > + /* Stop AVB-DMAC process */ > + result = ravb_reset(ndev); > + if (result < 0) { > + netdev_err(ndev, > + "Cannot reset ringparam! Any AVB processes are still running?\n"); > + return result; > + } > + synchronize_irq(ndev->irq); > + } > + > + /* Free all the skbuffs in the RX queue. */ > + ravb_ring_free(ndev, RAVB_BE); > + ravb_ring_free(ndev, RAVB_NC); > + /* Free DMA buffer */ > + ravb_free_dma_buffer(priv); > + > + /* Set new parameters */ > + priv->num_rx_ring[RAVB_BE] = ring->rx_pending; > + priv->num_tx_ring[RAVB_BE] = ring->tx_pending; > + priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; > + priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; > + > + result = ravb_ring_init(ndev, RAVB_BE); > + if (result < 0) { > + netdev_err(ndev, "%s: ravb_ring_init(RAVB_BE) failed\n", > + __func__); > + return result; > + } > + > + result = ravb_ring_init(ndev, RAVB_NC); > + if (result < 0) { > + netdev_err(ndev, "%s: ravb_ring_init(RAVB_NC) failed\n", > + __func__); > + return result; > + } > + > + result = ravb_dmac_init(ndev, false); > + if (result < 0) { > + netdev_err(ndev, "%s: ravb_dmac_init() failed\n", __func__); > + return result; > + } > + > + ravb_mac_init(ndev, false); > + > + if (netif_running(ndev)) { > + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | > + CCC_OPC_OPERATION, CCC); > + netif_wake_queue(ndev); > + } > + > + return 0; > +} > + > +static int ravb_get_ts_info(struct net_device *ndev, > + struct ethtool_ts_info *info) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + info->so_timestamping = > + SOF_TIMESTAMPING_TX_SOFTWARE | > + SOF_TIMESTAMPING_RX_SOFTWARE | > + SOF_TIMESTAMPING_SOFTWARE | > + SOF_TIMESTAMPING_TX_HARDWARE | > + SOF_TIMESTAMPING_RX_HARDWARE | > + SOF_TIMESTAMPING_RAW_HARDWARE; > + info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); > + info->rx_filters = > + (1 << HWTSTAMP_FILTER_NONE) | > + (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | > + (1 << HWTSTAMP_FILTER_ALL); > + info->phc_index = ptp_clock_index(priv->ptp.clock); > + > + return 0; > +} > + > +static const struct ethtool_ops ravb_ethtool_ops = { > + .get_settings = ravb_get_settings, > + .set_settings = ravb_set_settings, > + .nway_reset = ravb_nway_reset, > + .get_msglevel = ravb_get_msglevel, > + .set_msglevel = ravb_set_msglevel, > + .get_link = ethtool_op_get_link, > + .get_strings = ravb_get_strings, > + .get_ethtool_stats = ravb_get_ethtool_stats, > + .get_sset_count = ravb_get_sset_count, > + .get_ringparam = ravb_get_ringparam, > + .set_ringparam = ravb_set_ringparam, > + .get_ts_info = ravb_get_ts_info, > +}; > + > +/* Network device open function for Ethernet AVB */ > +static int ravb_open(struct net_device *ndev) > +{ > + int result; > + struct ravb_private *priv = netdev_priv(ndev); > + > + napi_enable(&priv->napi); > + > + result = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED, ndev->name, > + ndev); > + if (result) { > + netdev_err(ndev, "cannot request IRQ\n"); > + goto out_napi_off; > + } > + > + /* Descriptor set */ > + /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the > + * card needs room to do 8 byte alignment, +2 so we can reserve > + * the first 2 bytes, and +16 gets room for the status word from the > + * card. > + */ > + priv->rx_buffer_size = (ndev->mtu <= 1492 ? PKT_BUF_SZ : > + (((ndev->mtu + 26 + 7) & ~7) + 2 + 16)); > + > + result = ravb_ring_init(ndev, RAVB_BE); > + if (result) > + goto out_free_irq; > + result = ravb_ring_init(ndev, RAVB_NC); > + if (result) > + goto out_free_irq; > + > + /* Device init */ > + result = ravb_dmac_init(ndev, true); > + if (result) > + goto out_free_irq; > + ravb_mac_init(ndev, true); > + > + /* PHY control start */ > + result = ravb_phy_start(ndev); > + if (result) > + goto out_free_irq; > + > + return 0; > + > +out_free_irq: > + free_irq(ndev->irq, ndev); > +out_napi_off: > + napi_disable(&priv->napi); > + return result; > +} > + > +/* Timeout function for Ethernet AVB */ > +static void ravb_tx_timeout(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + int i, q; > + > + netif_stop_queue(ndev); > + > + netif_err(priv, tx_err, ndev, > + "transmit timed out, status %8.8x, resetting...\n", > + ravb_read(ndev, ISS)); > + > + /* tx_errors count up */ > + ndev->stats.tx_errors++; > + > + /* Free all the skbuffs */ > + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { > + for (i = 0; i < priv->num_rx_ring[q]; i++) { > + dev_kfree_skb(priv->rx_skb[q][i]); > + priv->rx_skb[q][i] = NULL; > + } > + } > + for (q = RAVB_BE; q < NUM_TX_QUEUE; q++) { > + for (i = 0; i < priv->num_tx_ring[q]; i++) { > + dev_kfree_skb(priv->tx_skb[q][i]); > + priv->tx_skb[q][i] = NULL; > + kfree(priv->tx_buffers[q][i]); > + priv->tx_buffers[q][i] = NULL; > + } > + } > + > + /* Device init */ > + ravb_dmac_init(ndev, true); > + ravb_mac_init(ndev, true); > +} > + > +/* Packet transmit function for Ethernet AVB */ > +static int ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct ravb_tstamp_skb *ts_skb = NULL; > + struct ravb_tx_desc *desc; > + unsigned long flags; > + void *buffer; > + u32 entry; > + u32 tccr; > + int q; > + > + /* If skb needs TX timestamp, it is handled in network control queue */ > + q = (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC : RAVB_BE; > + > + spin_lock_irqsave(&priv->lock, flags); > + if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] - 4) { > + if (!ravb_tx_free(ndev, q)) { > + netif_warn(priv, tx_queued, ndev, "TX FD exhausted.\n"); > + netif_stop_queue(ndev); > + spin_unlock_irqrestore(&priv->lock, flags); > + return NETDEV_TX_BUSY; > + } > + } > + entry = priv->cur_tx[q] % priv->num_tx_ring[q]; > + priv->cur_tx[q]++; > + spin_unlock_irqrestore(&priv->lock, flags); > + > + if (skb_put_padto(skb, ETH_ZLEN)) > + return NETDEV_TX_OK; > + > + priv->tx_skb[q][entry] = skb; > + buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN); > + memcpy(buffer, skb->data, skb->len); > + desc = &priv->tx_ring[q][entry]; > + desc->ds = skb->len; > + desc->dptr = dma_map_single(&ndev->dev, buffer, skb->len, > + DMA_TO_DEVICE); > + if (dma_mapping_error(&ndev->dev, desc->dptr)) { > + dev_kfree_skb_any(skb); > + priv->tx_skb[q][entry] = NULL; > + return NETDEV_TX_OK; > + } > + > + /* TX timestamp required */ > + if (q == RAVB_NC) { > + ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC); > + if (!ts_skb) { > + netdev_err(ndev, > + "Cannot allocate skb list element for HW timestamp\n"); > + return -ENOMEM; > + } > + ts_skb->skb = skb; > + ts_skb->tag = priv->ts_skb_tag++; > + priv->ts_skb_tag %= 0x400; > + list_add_tail(&ts_skb->list, &priv->ts_skb_list); > + > + /* TAG and timestamp required flag */ > + skb_tx_timestamp(skb); > + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; Wrong order WRT skb_tx_timestamp() and SKBTX_IN_PROGRESS. From skbuff.h: /* device driver is going to provide hardware time stamp */ SKBTX_IN_PROGRESS = 1 << 2, > + desc->tsr = 1; > + desc->tag = ts_skb->tag; > + } > + > + /* Descriptor type */ > + desc->dt = DT_FSINGLE; > + > + spin_lock_irqsave(&priv->lock, flags); > + tccr = ravb_read(ndev, TCCR); > + if (!(tccr & (TCCR_TSRQ0 << q))) > + ravb_write(ndev, tccr | (TCCR_TSRQ0 << q), TCCR); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return NETDEV_TX_OK; > +} > + > +static struct net_device_stats *ravb_get_stats(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct net_device_stats *nstats, *stats0, *stats1; > + > + nstats = &ndev->stats; > + stats0 = &priv->stats[RAVB_BE]; > + stats1 = &priv->stats[RAVB_NC]; > + > + nstats->tx_dropped += ravb_read(ndev, TROCR); > + ravb_write(ndev, 0, TROCR); /* (write clear) */ > + nstats->collisions += ravb_read(ndev, CDCR); > + ravb_write(ndev, 0, CDCR); /* (write clear) */ > + nstats->tx_carrier_errors += ravb_read(ndev, LCCR); > + ravb_write(ndev, 0, LCCR); /* (write clear) */ > + > + nstats->tx_carrier_errors += ravb_read(ndev, CERCR); > + ravb_write(ndev, 0, CERCR); /* (write clear) */ > + nstats->tx_carrier_errors += ravb_read(ndev, CEECR); > + ravb_write(ndev, 0, CEECR); /* (write clear) */ > + > + nstats->rx_packets = stats0->rx_packets + stats1->rx_packets; > + nstats->tx_packets = stats0->tx_packets + stats1->tx_packets; > + nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes; > + nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes; > + nstats->multicast = stats0->multicast + stats1->multicast; > + nstats->rx_errors = stats0->rx_errors + stats1->rx_errors; > + nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors; > + nstats->rx_frame_errors = > + stats0->rx_frame_errors + stats1->rx_frame_errors; > + nstats->rx_length_errors = > + stats0->rx_length_errors + stats1->rx_length_errors; > + nstats->rx_missed_errors = > + stats0->rx_missed_errors + stats1->rx_missed_errors; > + nstats->rx_over_errors = > + stats0->rx_over_errors + stats1->rx_over_errors; > + > + return nstats; > +} > + > +/* device close function for Ethernet AVB */ > +static int ravb_close(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct ravb_tstamp_skb *ts_skb, *ts_skb1; > + > + netif_stop_queue(ndev); > + > + /* Disable interrupts by clearing the interrupt masks. */ > + ravb_write(ndev, 0, RIC0); > + ravb_write(ndev, 0, RIC1); > + ravb_write(ndev, 0, RIC2); > + ravb_write(ndev, 0, TIC); > + > + /* Wait for DMA stop */ > + ravb_wait_stop_dma(ndev); > + > + /* Set the config mode to stop the AVB-DMAC's processes */ > + if (ravb_reset(ndev) < 0) > + netdev_err(ndev, > + "Device will be stopped after HW processes are done.\n"); > + > + /* Clear the timestamp list */ > + list_for_each_entry_safe(ts_skb, ts_skb1, &priv->ts_skb_list, list) { > + list_del(&ts_skb->list); > + kfree(ts_skb); > + } > + > + /* PHY disconnect */ > + if (priv->phydev) { > + phy_stop(priv->phydev); > + phy_disconnect(priv->phydev); > + priv->phydev = NULL; > + } > + > + free_irq(ndev->irq, ndev); > + > + napi_disable(&priv->napi); > + > + /* Free all the skbs in the RX queue. */ > + ravb_ring_free(ndev, RAVB_BE); > + ravb_ring_free(ndev, RAVB_NC); > + > + /* Free DMA buffer */ > + ravb_free_dma_buffer(priv); > + > + return 0; > +} > + > +/* Control hardware time stamping */ > +static int ravb_hwtstamp_ioctl(struct net_device *ndev, struct ifreq *ifr, > + int cmd) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct hwtstamp_config config; > + u32 tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED; > + u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED; > + > + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) > + return -EFAULT; > + > + /* Reserved for future extensions */ > + if (config.flags) > + return -EINVAL; > + > + switch (config.tx_type) { > + case HWTSTAMP_TX_OFF: > + tstamp_tx_ctrl = 0; > + case HWTSTAMP_TX_ON: > + break; > + default: > + return -ERANGE; > + } > + > + switch (config.rx_filter) { > + case HWTSTAMP_FILTER_NONE: > + tstamp_rx_ctrl = 0; > + break; > + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: > + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; > + break; > + default: > + config.rx_filter = HWTSTAMP_FILTER_ALL; > + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL; > + } > + > + priv->tstamp_tx_ctrl = tstamp_tx_ctrl; > + priv->tstamp_rx_ctrl = tstamp_rx_ctrl; > + > + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? > + -EFAULT : 0; > +} > + > +/* ioctl to device function */ > +static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + struct phy_device *phydev = priv->phydev; > + > + if (!netif_running(ndev)) > + return -EINVAL; > + > + if (!phydev) > + return -ENODEV; > + > + if (cmd == SIOCSHWTSTAMP) > + return ravb_hwtstamp_ioctl(ndev, req, cmd); > + > + return phy_mii_ioctl(phydev, req, cmd); > +} > + > +static const struct net_device_ops ravb_netdev_ops = { > + .ndo_open = ravb_open, > + .ndo_stop = ravb_close, > + .ndo_start_xmit = ravb_start_xmit, > + .ndo_get_stats = ravb_get_stats, > + .ndo_tx_timeout = ravb_tx_timeout, > + .ndo_do_ioctl = ravb_do_ioctl, > + .ndo_validate_addr = eth_validate_addr, > + .ndo_set_mac_address = eth_mac_addr, > + .ndo_change_mtu = eth_change_mtu, > +}; > + > +static void ravb_ptp_tcr_request(struct ravb_private *priv, int request) > +{ > + struct net_device *ndev = priv->ndev; > + > + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) { > + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) > + ; > + ravb_write(ndev, ravb_read(ndev, GCCR) | request, GCCR); > + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) > + ; Infinite loops while holding spin lock. > + } > +} > + > +static bool ravb_ptp_is_config(struct ravb_private *priv) > +{ This is a bit hacky. Can't your driver make sure that the HW is ready? > + if (ravb_read(priv->ndev, CSR) & CSR_OPS_CONFIG) > + return true; > + else > + return false; > +} > + > +/* Caller must hold lock */ > +static void ravb_ptp_time_read(struct ravb_private *priv, struct timespec *ts) > +{ > + struct net_device *ndev = priv->ndev; > + > + ravb_ptp_tcr_request(priv, GCCR_TCR_CAPTURE); > + > + ts->tv_nsec = ravb_read(ndev, GCT0); > + ts->tv_sec = ravb_read(ndev, GCT1); > +} > + > +/* Caller must hold lock */ > +static void ravb_ptp_time_write(struct ravb_private *priv, > + const struct timespec *ts) timespec64 > +{ > + struct net_device *ndev = priv->ndev; > + > + ravb_ptp_tcr_request(priv, GCCR_TCR_RESET); > + > + ravb_write(ndev, ts->tv_nsec, GTO0); > + ravb_write(ndev, ts->tv_sec, GTO1); > + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTO, GCCR); > + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) > + while (ravb_read(ndev, GCCR) & GCCR_LTO) > + ; Infinite loop. > +} > + > +/* Caller must hold lock */ > +static u64 ravb_ptp_cnt_read(struct ravb_private *priv) > +{ > + struct timespec ts; timespec64 > + ktime_t kt; > + > + ravb_ptp_time_read(priv, &ts); > + kt = timespec_to_ktime(ts); > + > + return ktime_to_ns(kt); > +} > + > +/* Caller must hold lock */ > +static void ravb_ptp_cnt_write(struct ravb_private *priv, u64 ns) > +{ > + struct timespec ts; timespec64 > + > + ts = ns_to_timespec(ns); > + > + ravb_ptp_time_write(priv, &ts); > +} > + > +/* Caller must hold lock */ > +static void ravb_ptp_select_counter(struct ravb_private *priv, u16 sel) > +{ > + struct net_device *ndev = priv->ndev; > + u32 val; > + > + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) > + ; Infinte loop. > + val = ravb_read(ndev, GCCR) & ~GCCR_TCSS; > + ravb_write(ndev, val | (sel << 8), GCCR); > +} > + > +/* Caller must hold lock */ > +static void ravb_ptp_update_addend(struct ravb_private *priv, u32 addend) > +{ > + struct net_device *ndev = priv->ndev; > + > + priv->ptp.current_addend = addend; > + > + ravb_write(ndev, addend & GTI_TIV, GTI); > + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); > + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) > + while (ravb_read(ndev, GCCR) & GCCR_LTI) > + ; loop. > +} > + > +/* PTP clock operations */ > +static int ravb_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + unsigned long flags; > + u32 diff, addend; > + int neg_adj = 0; > + u64 adj; > + > + if (ppb < 0) { > + neg_adj = 1; > + ppb = -ppb; > + } > + addend = priv->ptp.default_addend; > + adj = addend; > + adj *= ppb; > + diff = div_u64(adj, NSEC_PER_SEC); > + > + addend = neg_adj ? addend - diff : addend + diff; > + > + spin_lock_irqsave(&priv->lock, flags); > + ravb_ptp_update_addend(priv, addend); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return 0; > +} > + > +static int ravb_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + unsigned long flags; > + u64 now; > + > + if (ravb_ptp_is_config(priv)) > + return -EBUSY; > + > + spin_lock_irqsave(&priv->lock, flags); > + now = ravb_ptp_cnt_read(priv); > + now += delta; > + ravb_ptp_cnt_write(priv, now); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return 0; > +} > + > +static int ravb_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts) The PHC driver API will be changing to timespec64 soon. (See recent patch series.) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + unsigned long flags; > + > + if (ravb_ptp_is_config(priv)) > + return -EBUSY; > + > + spin_lock_irqsave(&priv->lock, flags); > + ravb_ptp_time_read(priv, ts); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return 0; > +} > + > +static int ravb_ptp_settime(struct ptp_clock_info *ptp, > + const struct timespec *ts) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + unsigned long flags; > + > + spin_lock_irqsave(&priv->lock, flags); > + ravb_ptp_time_write(priv, ts); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return 0; > +} > + > +static int ravb_ptp_extts(struct ptp_clock_info *ptp, > + struct ptp_extts_request *req, int on) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + struct net_device *ndev = priv->ndev; > + unsigned long flags; > + u32 gic; > + > + if (req->index) > + return -EINVAL; > + > + if (priv->ptp.extts[req->index] == on) > + return 0; > + priv->ptp.extts[req->index] = on; > + > + spin_lock_irqsave(&priv->lock, flags); > + gic = ravb_read(ndev, GIC); > + if (on) > + gic |= GIC_PTCE; > + else > + gic &= ~GIC_PTCE; > + ravb_write(ndev, gic, GIC); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + return 0; > +} > + > +static int ravb_ptp_perout(struct ptp_clock_info *ptp, > + struct ptp_perout_request *req, int on) > +{ > + struct ravb_private *priv = container_of(ptp, struct ravb_private, > + ptp.info); > + struct net_device *ndev = priv->ndev; > + struct ravb_ptp_perout *perout; > + unsigned long flags; > + u32 gic; > + > + if (req->index) > + return -EINVAL; > + > + if (on) { > + u64 start_ns; > + u64 period_ns; > + > + start_ns = req->start.sec * NSEC_PER_SEC + req->start.nsec; > + period_ns = req->period.sec * NSEC_PER_SEC + req->period.nsec; > + > + if (start_ns > U32_MAX) { > + netdev_warn(ndev, > + "ptp: Start value (nsec) is over limit. Maximum size of start is only 32 bits\n"); This line is rather long. > + return -ERANGE; > + } > + > + if (period_ns > U32_MAX) { > + netdev_warn(ndev, > + "ptp: Period value (nsec) is over limit. Maximum size of period is only 32 bits\n"); > + return -ERANGE; > + } > + > + spin_lock_irqsave(&priv->lock, flags); > + > + perout = &priv->ptp.perout[req->index]; > + perout->target = (u32)start_ns; > + perout->period = (u32)period_ns; > + ravb_ptp_update_compare(priv, (u32)start_ns); > + > + /* Unmask interrupt */ > + gic = ravb_read(ndev, GIC); > + gic |= GIC_PTME; > + ravb_write(ndev, gic, GIC); > + > + spin_unlock_irqrestore(&priv->lock, flags); > + } else { > + spin_lock_irqsave(&priv->lock, flags); > + > + perout = &priv->ptp.perout[req->index]; > + perout->period = 0; > + > + /* Mask interrupt */ > + gic = ravb_read(ndev, GIC); > + gic &= ~GIC_PTME; > + ravb_write(ndev, gic, GIC); > + > + spin_unlock_irqrestore(&priv->lock, flags); > + } > + > + return 0; > +} > + > +static int ravb_ptp_enable(struct ptp_clock_info *ptp, > + struct ptp_clock_request *req, int on) > +{ > + switch (req->type) { > + case PTP_CLK_REQ_EXTTS: > + return ravb_ptp_extts(ptp, &req->extts, on); > + case PTP_CLK_REQ_PEROUT: > + return ravb_ptp_perout(ptp, &req->perout, on); > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static const struct ptp_clock_info ravb_ptp_info = { > + .owner = THIS_MODULE, > + .name = "ravb clock", > + .max_adj = 50000000, > + .n_ext_ts = N_EXT_TS, > + .n_per_out = N_PER_OUT, > + .adjfreq = ravb_ptp_adjfreq, > + .adjtime = ravb_ptp_adjtime, > + .gettime = ravb_ptp_gettime, > + .settime = ravb_ptp_settime, So get/settime will change to timespec64 soon. Thanks, Richard > + .enable = ravb_ptp_enable, > +}; > + > +static int ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + unsigned long flags; > + > + priv->ptp.info = ravb_ptp_info; > + > + priv->ptp.default_addend = ravb_read(ndev, GTI); > + priv->ptp.current_addend = priv->ptp.default_addend; > + > + spin_lock_irqsave(&priv->lock, flags); > + ravb_ptp_select_counter(priv, GCCR_TCSS_ADJGPTP); > + spin_unlock_irqrestore(&priv->lock, flags); > + > + priv->ptp.clock = ptp_clock_register(&priv->ptp.info, &pdev->dev); > + if (IS_ERR(priv->ptp.clock)) > + return PTR_ERR(priv->ptp.clock); > + > + return 0; > +} > + > +static void ravb_ptp_stop(struct net_device *ndev) > +{ > + struct ravb_private *priv = netdev_priv(ndev); > + > + ravb_write(ndev, 0, GIC); > + ravb_write(ndev, 0, GIS); > + > + ptp_clock_unregister(priv->ptp.clock); > +} > + > +/* MDIO bus init function */ > +static int ravb_mdio_init(struct ravb_private *priv) > +{ > + struct platform_device *pdev = priv->pdev; > + struct device *dev = &pdev->dev; > + int result; > + > + /* Bitbang init */ > + priv->mdiobb.ops = &bb_ops; > + > + /* MII controller setting */ > + priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb); > + if (!priv->mii_bus) > + return -ENOMEM; > + > + /* Hook up MII support for ethtool */ > + priv->mii_bus->name = "ravb_mii"; > + priv->mii_bus->parent = dev; > + snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", > + pdev->name, pdev->id); > + > + /* Register MDIO bus */ > + result = of_mdiobus_register(priv->mii_bus, dev->of_node); > + if (result) > + goto out_free_bus; > + > + return 0; > + > +out_free_bus: > + free_mdio_bitbang(priv->mii_bus); > + return result; > +} > + > +/* MDIO bus release function */ > +static int ravb_mdio_release(struct ravb_private *priv) > +{ > + /* Unregister mdio bus */ > + mdiobus_unregister(priv->mii_bus); > + > + /* Free bitbang info */ > + free_mdio_bitbang(priv->mii_bus); > + > + return 0; > +} > + > +static int ravb_probe(struct platform_device *pdev) > +{ > + struct device_node *np = pdev->dev.of_node; > + struct ravb_private *priv; > + struct net_device *ndev; > + int result, q; > + struct resource *res; > + > + if (!np) { > + dev_err(&pdev->dev, > + "this driver is required to be instantiated from device tree\n"); > + return -EINVAL; > + } > + > + /* Get base address */ > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(&pdev->dev, "invalid resource\n"); > + return -EINVAL; > + } > + > + ndev = alloc_etherdev(sizeof(struct ravb_private)); > + if (!ndev) > + return -ENOMEM; > + > + pm_runtime_enable(&pdev->dev); > + pm_runtime_get_sync(&pdev->dev); > + > + /* The Ether-specific entries in the device structure. */ > + ndev->base_addr = res->start; > + ndev->dma = -1; > + result = platform_get_irq(pdev, 0); > + if (result < 0) { > + result = -ENODEV; > + goto out_release; > + } > + ndev->irq = result; > + > + SET_NETDEV_DEV(ndev, &pdev->dev); > + > + priv = netdev_priv(ndev); > + priv->ndev = ndev; > + priv->pdev = pdev; > + priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE; > + priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE; > + priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; > + priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; > + priv->addr = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(priv->addr)) { > + result = PTR_ERR(priv->addr); > + goto out_release; > + } > + > + spin_lock_init(&priv->lock); > + > + priv->phy_interface = of_get_phy_mode(np); > + > + priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link"); > + priv->avb_link_active_low = > + of_property_read_bool(np, "renesas,ether-link-active-low"); > + > + ndev->netdev_ops = &ravb_netdev_ops; > + > + priv->rx_over_errors = 0; > + priv->rx_fifo_errors = 0; > + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { > + struct net_device_stats *stats = &priv->stats[q]; > + > + stats->rx_packets = 0; > + stats->tx_packets = 0; > + stats->rx_bytes = 0; > + stats->tx_bytes = 0; > + stats->multicast = 0; > + stats->rx_errors = 0; > + stats->rx_crc_errors = 0; > + stats->rx_frame_errors = 0; > + stats->rx_length_errors = 0; > + stats->rx_missed_errors = 0; > + stats->rx_over_errors = 0; > + } > + > + /* Set function */ > + ndev->netdev_ops = &ravb_netdev_ops; > + ndev->ethtool_ops = &ravb_ethtool_ops; > + > + /* Set AVB config mode */ > + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, > + CCC); > + > + /* Set CSEL value */ > + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) | CCC_CSEL_HPB, > + CCC); > + > + /* Set GTI value */ > + ravb_write(ndev, ((1000 << 20) / 130) & GTI_TIV, GTI); > + > + /* Request GTI loading */ > + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); > + > + /* Allocate descriptor base address table */ > + priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM; > + priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size, > + &priv->desc_bat_dma, GFP_KERNEL); > + if (!priv->desc_bat) { > + dev_err(&ndev->dev, > + "Cannot allocate desc base address table (size %d bytes)\n", > + priv->desc_bat_size); > + result = -ENOMEM; > + goto out_release; > + } > + for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++) > + priv->desc_bat[q].dt = DT_EOS; > + ravb_write(ndev, priv->desc_bat_dma, DBAT); > + > + /* Initialise HW timestamp list */ > + INIT_LIST_HEAD(&priv->ts_skb_list); > + > + /* Initialise PTP Clock driver */ > + ravb_ptp_init(ndev, pdev); > + > + /* Debug message level */ > + priv->msg_enable = RAVB_DEF_MSG_ENABLE; > + > + /* Read and set MAC address */ > + read_mac_address(ndev, of_get_mac_address(np)); > + if (!is_valid_ether_addr(ndev->dev_addr)) { > + dev_warn(&pdev->dev, > + "no valid MAC address supplied, using a random one\n"); > + eth_hw_addr_random(ndev); > + } > + > + /* MDIO bus init */ > + result = ravb_mdio_init(priv); > + if (result) { > + dev_err(&ndev->dev, "failed to initialize MDIO\n"); > + goto out_dma_free; > + } > + > + netif_napi_add(ndev, &priv->napi, ravb_poll, 64); > + > + /* Network device register */ > + result = register_netdev(ndev); > + if (result) > + goto out_napi_del; > + > + /* Print device information */ > + netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n", > + (u32)ndev->base_addr, ndev->dev_addr, ndev->irq); > + > + platform_set_drvdata(pdev, ndev); > + > + return 0; > + > +out_napi_del: > + netif_napi_del(&priv->napi); > + ravb_mdio_release(priv); > +out_dma_free: > + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, > + priv->desc_bat_dma); > + /* Stop PTP Clock driver */ > + ravb_ptp_stop(ndev); > +out_release: > + if (ndev) > + free_netdev(ndev); > + > + pm_runtime_put(&pdev->dev); > + pm_runtime_disable(&pdev->dev); > + return result; > +} > + > +static int ravb_remove(struct platform_device *pdev) > +{ > + struct net_device *ndev = platform_get_drvdata(pdev); > + struct ravb_private *priv = netdev_priv(ndev); > + > + /* Stop PTP clock driver */ > + ravb_ptp_stop(ndev); > + > + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, > + priv->desc_bat_dma); > + /* Set reset mode */ > + ravb_write(ndev, CCC_OPC_RESET, CCC); > + pm_runtime_put_sync(&pdev->dev); > + unregister_netdev(ndev); > + netif_napi_del(&priv->napi); > + ravb_mdio_release(priv); > + pm_runtime_disable(&pdev->dev); > + free_netdev(ndev); > + platform_set_drvdata(pdev, NULL); > + > + return 0; > +} > + > +#ifdef CONFIG_PM > +static int ravb_runtime_nop(struct device *dev) > +{ > + /* Runtime PM callback shared between ->runtime_suspend() > + * and ->runtime_resume(). Simply returns success. > + * > + * This driver re-initializes all registers after > + * pm_runtime_get_sync() anyway so there is no need > + * to save and restore registers here. > + */ > + return 0; > +} > + > +static const struct dev_pm_ops ravb_dev_pm_ops = { > + .runtime_suspend = ravb_runtime_nop, > + .runtime_resume = ravb_runtime_nop, > +}; > + > +#define RAVB_PM_OPS (&ravb_dev_pm_ops) > +#else > +#define RAVB_PM_OPS NULL > +#endif > + > +static const struct of_device_id ravb_match_table[] = { > + { .compatible = "renesas,ravb-r8a7790" }, > + { .compatible = "renesas,ravb-r8a7794" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, ravb_match_table); > + > +static struct platform_driver ravb_driver = { > + .probe = ravb_probe, > + .remove = ravb_remove, > + .driver = { > + .name = "ravb", > + .pm = RAVB_PM_OPS, > + .of_match_table = ravb_match_table, > + }, > +}; > + > +module_platform_driver(ravb_driver); > + > +MODULE_AUTHOR("Mitsuhiro Kimura"); > +MODULE_DESCRIPTION("Renesas Ethernet AVB driver"); > +MODULE_LICENSE("GPL v2"); > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Index: net-next/Documentation/devicetree/bindings/net/renesas,ravb.txt =================================================================== --- /dev/null +++ net-next/Documentation/devicetree/bindings/net/renesas,ravb.txt @@ -0,0 +1,48 @@ +* Renesas Electronics Ethernet AVB + +This file provides information on what the device node for the Ethernet AVB +interface contains. + +Required properties: +- compatible: "renesas,ravb-r8a7790" if the device is a part of R8A7790 SoC. + "renesas,ravb-r8a7794" if the device is a part of R8A7794 SoC. +- reg: offset and length of (1) the register block and (2) the stream buffer. +- interrupts: interrupt specifier for the sole interrupt. +- phy-mode: see ethernet.txt file in the same directory. +- phy-handle: see ethernet.txt file in the same directory. +- #address-cells: number of address cells for the MDIO bus, must be equal to 1. +- #size-cells: number of size cells on the MDIO bus, must be equal to 0. +- clocks: clock phandle and specifier pair. +- pinctrl-0: phandle, referring to a default pin configuration node. + +Optional properties: +- interrupt-parent: the phandle for the interrupt controller that services + interrupts for this device. +- pinctrl-names: pin configuration state name ("default"). +- renesas,no-ether-link: boolean, specify when a board does not provide a proper + AVB_LINK signal. +- renesas,ether-link-active-low: boolean, specify when the AVB_LINK signal is + active-low instead of normal active-high. + +Example: + + ethernet@e6800000 { + compatible = "renesas,ravb-r8a7790"; + reg = <0 0xe6800000 0 0x800>, <0 0xee0e8000 0 0x4000>; + interrupt-parent = <&gic>; + interrupts = <0 163 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp8_clks R8A7790_CLK_ETHERAVB>; + phy-mode = "rmii"; + phy-handle = <&phy0>; + pinctrl-0 = <&ether_pins>; + pinctrl-names = "default"; + renesas,no-ether-link; + #address-cells = <1>; + #size-cells = <0>; + + phy0: ethernet-phy@0 { + reg = <0>; + interrupt-parent = <&gpio2>; + interrupts = <15 IRQ_TYPE_LEVEL_LOW>; + }; + }; Index: net-next/drivers/net/ethernet/renesas/Kconfig =================================================================== --- net-next.orig/drivers/net/ethernet/renesas/Kconfig +++ net-next/drivers/net/ethernet/renesas/Kconfig @@ -15,3 +15,17 @@ config SH_ETH This driver supporting CPUs are: - SH7619, SH7710, SH7712, SH7724, SH7734, SH7763, SH7757, R8A7740, R8A777x and R8A779x. + +config RAVB + tristate "Renesas Ethernet AVB support" + depends on HAS_DMA + depends on ARCH_SHMOBILE || COMPILE_TEST + select CRC32 + select MII + select MDIO_BITBANG + select PHYLIB + select PTP_1588_CLOCK + help + Renesas Ethernet AVB device driver. + This driver supports the following SoCs: + - R8A779x. Index: net-next/drivers/net/ethernet/renesas/Makefile =================================================================== --- net-next.orig/drivers/net/ethernet/renesas/Makefile +++ net-next/drivers/net/ethernet/renesas/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_SH_ETH) += sh_eth.o +obj-$(CONFIG_RAVB) += ravb.o Index: net-next/drivers/net/ethernet/renesas/ravb.c =================================================================== --- /dev/null +++ net-next/drivers/net/ethernet/renesas/ravb.c @@ -0,0 +1,3071 @@ +/* Renesas Ethernet AVB device driver + * + * Copyright (C) 2014-2015 Renesas Electronics Corporation + * Copyright (C) 2015 Renesas Solutions Corp. + * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com> + * + * Based on the SuperH Ethernet driver + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License version 2, + * as published by the Free Software Foundation. + */ + +#include <linux/cache.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/if_vlan.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/mdio-bitbang.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/net_tstamp.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/phy.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/ptp_clock_kernel.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#define TX_TIMEOUT (5 * HZ) + +#define BE_TX_RING_SIZE 64 /* TX ring size for Best Effort */ +#define BE_RX_RING_SIZE 1024 /* RX ring size for Best Effort */ +#define NC_TX_RING_SIZE 64 /* TX ring size for Network Control */ +#define NC_RX_RING_SIZE 64 /* RX ring size for Network Control */ +#define BE_TX_RING_MIN 64 +#define BE_RX_RING_MIN 64 +#define NC_TX_RING_MIN 64 +#define NC_RX_RING_MIN 64 +#define BE_TX_RING_MAX 1024 +#define BE_RX_RING_MAX 2048 +#define NC_TX_RING_MAX 128 +#define NC_RX_RING_MAX 128 + +#define PKT_BUF_SZ 1538 + +enum ravb_reg { + /* AVB-DMAC registers */ + CCC = 0x0000, + DBAT = 0x0004, + DLR = 0x0008, + CSR = 0x000C, + CDAR0 = 0x0010, + CDAR1 = 0x0014, + CDAR2 = 0x0018, + CDAR3 = 0x001C, + CDAR4 = 0x0020, + CDAR5 = 0x0024, + CDAR6 = 0x0028, + CDAR7 = 0x002C, + CDAR8 = 0x0030, + CDAR9 = 0x0034, + CDAR10 = 0x0038, + CDAR11 = 0x003C, + CDAR12 = 0x0040, + CDAR13 = 0x0044, + CDAR14 = 0x0048, + CDAR15 = 0x004C, + CDAR16 = 0x0050, + CDAR17 = 0x0054, + CDAR18 = 0x0058, + CDAR19 = 0x005C, + CDAR20 = 0x0060, + CDAR21 = 0x0064, + ESR = 0x0088, + RCR = 0x0090, + RQC0 = 0x0094, + RQC1 = 0x0098, + RQC2 = 0x009C, + RQC3 = 0x00A0, + RQC4 = 0x00A4, + RPC = 0x00B0, + UFCW = 0x00BC, + UFCS = 0x00C0, + UFCV0 = 0x00C4, + UFCV1 = 0x00C8, + UFCV2 = 0x00CC, + UFCV3 = 0x00D0, + UFCV4 = 0x00D4, + UFCD0 = 0x00E0, + UFCD1 = 0x00E4, + UFCD2 = 0x00E8, + UFCD3 = 0x00EC, + UFCD4 = 0x00F0, + SFO = 0x00FC, + SFP0 = 0x0100, + SFP1 = 0x0104, + SFP2 = 0x0108, + SFP3 = 0x010C, + SFP4 = 0x0110, + SFP5 = 0x0114, + SFP6 = 0x0118, + SFP7 = 0x011C, + SFP8 = 0x0120, + SFP9 = 0x0124, + SFP10 = 0x0128, + SFP11 = 0x012C, + SFP12 = 0x0130, + SFP13 = 0x0134, + SFP14 = 0x0138, + SFP15 = 0x013C, + SFP16 = 0x0140, + SFP17 = 0x0144, + SFP18 = 0x0148, + SFP19 = 0x014C, + SFP20 = 0x0150, + SFP21 = 0x0154, + SFP22 = 0x0158, + SFP23 = 0x015C, + SFP24 = 0x0160, + SFP25 = 0x0164, + SFP26 = 0x0168, + SFP27 = 0x016C, + SFP28 = 0x0170, + SFP29 = 0x0174, + SFP30 = 0x0178, + SFP31 = 0x017C, + SFM0 = 0x01C0, + SFM1 = 0x01C4, + TGC = 0x0300, + TCCR = 0x0304, + TSR = 0x0308, + TFA0 = 0x0310, + TFA1 = 0x0314, + TFA2 = 0x0318, + CIVR0 = 0x0320, + CIVR1 = 0x0324, + CDVR0 = 0x0328, + CDVR1 = 0x032C, + CUL0 = 0x0330, + CUL1 = 0x0334, + CLL0 = 0x0338, + CLL1 = 0x033C, + DIC = 0x0350, + DIS = 0x0354, + EIC = 0x0358, + EIS = 0x035C, + RIC0 = 0x0360, + RIS0 = 0x0364, + RIC1 = 0x0368, + RIS1 = 0x036C, + RIC2 = 0x0370, + RIS2 = 0x0374, + TIC = 0x0378, + TIS = 0x037C, + ISS = 0x0380, + GCCR = 0x0390, + GMTT = 0x0394, + GPTC = 0x0398, + GTI = 0x039C, + GTO0 = 0x03A0, + GTO1 = 0x03A4, + GTO2 = 0x03A8, + GIC = 0x03AC, + GIS = 0x03B0, + GCPT = 0x03B4, /* Undocumented? */ + GCT0 = 0x03B8, + GCT1 = 0x03BC, + GCT2 = 0x03C0, + + /* E-MAC registers */ + ECMR = 0x0500, + RFLR = 0x0508, + ECSR = 0x0510, + ECSIPR = 0x0518, + PIR = 0x0520, + PSR = 0x0528, + PIPR = 0x052c, + MPR = 0x0558, + PFTCR = 0x055c, + PFRCR = 0x0560, + GECMR = 0x05b0, + MAHR = 0x05c0, + MALR = 0x05c8, + TROCR = 0x0700, /* Undocumented? */ + CDCR = 0x0708, /* Undocumented? */ + LCCR = 0x0710, /* Undocumented? */ + CEFCR = 0x0740, + FRECR = 0x0748, + TSFRCR = 0x0750, + TLFRCR = 0x0758, + RFCR = 0x0760, + CERCR = 0x0768, /* Undocumented? */ + CEECR = 0x0770, /* Undocumented? */ + MAFCR = 0x0778, +}; + +/* Driver's parameters */ +#define RAVB_ALIGN 128 + +/* Hardware time stamp */ +#define RAVB_TXTSTAMP_VALID 0x00000001 /* TX timestamp valid */ +#define RAVB_TXTSTAMP_ENABLED 0x00000010 /* enable TX timestampping */ +#define RAVB_RXTSTAMP_VALID 0x00000001 /* RX timestamp valid */ +#define RAVB_RXTSTAMP_TYPE 0x00000006 /* RX type mask */ +#define RAVB_RXTSTAMP_TYPE_V2_L2_EVENT 0x00000002 +#define RAVB_RXTSTAMP_TYPE_ALL 0x00000006 +#define RAVB_RXTSTAMP_ENABLED 0x00000010 /* enable rx timestampping */ + +/* Register bits of the Ethernet AVB */ +/* CCC */ +enum CCC_BIT { + CCC_OPC = 0x00000003, + CCC_OPC_RESET = 0x00000000, + CCC_OPC_CONFIG = 0x00000001, + CCC_OPC_OPERATION = 0x00000002, + CCC_DTSR = 0x00000100, + CCC_CSEL = 0x00030000, + CCC_CSEL_HPB = 0x00010000, + CCC_CSEL_ETH_TX = 0x00020000, + CCC_CSEL_GMII_REF = 0x00030000, + CCC_BOC = 0x00100000, /* Undocumented? */ + CCC_LBME = 0x01000000, +}; + +/* CSR */ +enum CSR_BIT { + CSR_OPS = 0x0000000F, + CSR_OPS_RESET = 0x00000001, + CSR_OPS_CONFIG = 0x00000002, + CSR_OPS_OPERATION = 0x00000004, + CSR_OPS_STANDBY = 0x00000008, /* Undocumented? */ + CSR_DTS = 0x00000100, + CSR_TPO0 = 0x00010000, + CSR_TPO1 = 0x00020000, + CSR_TPO2 = 0x00040000, + CSR_TPO3 = 0x00080000, + CSR_RPO = 0x00100000, +}; + +/* ESR */ +enum ESR_BIT { + ESR_EQN = 0x0000001F, + ESR_ET = 0x00000F00, + ESR_EIL = 0x00001000, +}; + +/* RCR */ +enum RCR_BIT { + RCR_EFFS = 0x00000001, + RCR_ENCF = 0x00000002, + RCR_ESF = 0x0000000C, + RCR_ETS0 = 0x00000010, + RCR_ETS2 = 0x00000020, + RCR_RFCL = 0x1FFF0000, +}; + +/* RQC0/1/2/3/4 */ +enum RQC_BIT { + RQC_RSM0 = 0x00000003, + RQC_UFCC0 = 0x00000030, + RQC_RSM1 = 0x00000300, + RQC_UFCC1 = 0x00003000, + RQC_RSM2 = 0x00030000, + RQC_UFCC2 = 0x00300000, + RQC_RSM3 = 0x03000000, + RQC_UFCC3 = 0x30000000, +}; + +/* RPC */ +enum RPC_BIT { + RPC_PCNT = 0x00000700, + RPC_DCNT = 0x00FF0000, +}; + +/* UFCW */ +enum UFCW_BIT { + UFCW_WL0 = 0x0000003F, + UFCW_WL1 = 0x00003F00, + UFCW_WL2 = 0x003F0000, + UFCW_WL3 = 0x3F000000, +}; + +/* UFCS */ +enum UFCS_BIT { + UFCS_SL0 = 0x0000003F, + UFCS_SL1 = 0x00003F00, + UFCS_SL2 = 0x003F0000, + UFCS_SL3 = 0x3F000000, +}; + +/* UFCV0/1/2/3/4 */ +enum UFCV_BIT { + UFCV_CV0 = 0x0000003F, + UFCV_CV1 = 0x00003F00, + UFCV_CV2 = 0x003F0000, + UFCV_CV3 = 0x3F000000, +}; + +/* UFCD0/1/2/3/4 */ +enum UFCD_BIT { + UFCD_DV0 = 0x0000003F, + UFCD_DV1 = 0x00003F00, + UFCD_DV2 = 0x003F0000, + UFCD_DV3 = 0x3F000000, +}; + +/* SFO */ +enum SFO_BIT { + SFO_FPB = 0x0000003F, +}; + +/* RTC */ +enum RTC_BIT { + RTC_MFL0 = 0x00000FFF, + RTC_MFL1 = 0x0FFF0000, +}; + +/* TGC */ +enum TGC_BIT { + TGC_TSM0 = 0x00000001, + TGC_TSM1 = 0x00000002, + TGC_TSM2 = 0x00000004, + TGC_TSM3 = 0x00000008, + TGC_TQP = 0x00000030, + TGC_TQP_NONAVB = 0x00000000, + TGC_TQP_AVBMODE1 = 0x00000010, + TGC_TQP_AVBMODE2 = 0x00000030, + TGC_TBD0 = 0x00000300, + TGC_TBD1 = 0x00003000, + TGC_TBD2 = 0x00030000, + TGC_TBD3 = 0x00300000, +}; + +/* TCCR */ +enum TCCR_BIT { + TCCR_TSRQ0 = 0x00000001, + TCCR_TSRQ1 = 0x00000002, + TCCR_TSRQ2 = 0x00000004, + TCCR_TSRQ3 = 0x00000008, + TCCR_TFEN = 0x00000100, + TCCR_TFR = 0x00000200, +}; + +/* TSR */ +enum TSR_BIT { + TSR_CCS0 = 0x00000003, + TSR_CCS1 = 0x0000000C, + TSR_TFFL = 0x00000700, +}; + +/* TFA2 */ +enum TFA2_BIT { + TFA2_TSV = 0x0000FFFF, + TFA2_TST = 0x03FF0000, +}; + +/* DIC */ +enum DIC_BIT { + DIC_DPE1 = 0x00000002, + DIC_DPE2 = 0x00000004, + DIC_DPE3 = 0x00000008, + DIC_DPE4 = 0x00000010, + DIC_DPE5 = 0x00000020, + DIC_DPE6 = 0x00000040, + DIC_DPE7 = 0x00000080, + DIC_DPE8 = 0x00000100, + DIC_DPE9 = 0x00000200, + DIC_DPE10 = 0x00000400, + DIC_DPE11 = 0x00000800, + DIC_DPE12 = 0x00001000, + DIC_DPE13 = 0x00002000, + DIC_DPE14 = 0x00004000, + DIC_DPE15 = 0x00008000, +}; + +/* DIS */ +enum DIS_BIT { + DIS_DPF1 = 0x00000002, + DIS_DPF2 = 0x00000004, + DIS_DPF3 = 0x00000008, + DIS_DPF4 = 0x00000010, + DIS_DPF5 = 0x00000020, + DIS_DPF6 = 0x00000040, + DIS_DPF7 = 0x00000080, + DIS_DPF8 = 0x00000100, + DIS_DPF9 = 0x00000200, + DIS_DPF10 = 0x00000400, + DIS_DPF11 = 0x00000800, + DIS_DPF12 = 0x00001000, + DIS_DPF13 = 0x00002000, + DIS_DPF14 = 0x00004000, + DIS_DPF15 = 0x00008000, +}; + +/* EIC */ +enum EIC_BIT { + EIC_MREE = 0x00000001, + EIC_MTEE = 0x00000002, + EIC_QEE = 0x00000004, + EIC_SEE = 0x00000008, + EIC_CLLE0 = 0x00000010, + EIC_CLLE1 = 0x00000020, + EIC_CULE0 = 0x00000040, + EIC_CULE1 = 0x00000080, + EIC_TFFE = 0x00000100, +}; + +/* EIS */ +enum EIS_BIT { + EIS_MREF = 0x00000001, + EIS_MTEF = 0x00000002, + EIS_QEF = 0x00000004, + EIS_SEF = 0x00000008, + EIS_CLLF0 = 0x00000010, + EIS_CLLF1 = 0x00000020, + EIS_CULF0 = 0x00000040, + EIS_CULF1 = 0x00000080, + EIS_TFFF = 0x00000100, + EIS_QFS = 0x00010000, +}; + +/* RIC0 */ +enum RIC0_BIT { + RIC0_FRE0 = 0x00000001, + RIC0_FRE1 = 0x00000002, + RIC0_FRE2 = 0x00000004, + RIC0_FRE3 = 0x00000008, + RIC0_FRE4 = 0x00000010, + RIC0_FRE5 = 0x00000020, + RIC0_FRE6 = 0x00000040, + RIC0_FRE7 = 0x00000080, + RIC0_FRE8 = 0x00000100, + RIC0_FRE9 = 0x00000200, + RIC0_FRE10 = 0x00000400, + RIC0_FRE11 = 0x00000800, + RIC0_FRE12 = 0x00001000, + RIC0_FRE13 = 0x00002000, + RIC0_FRE14 = 0x00004000, + RIC0_FRE15 = 0x00008000, + RIC0_FRE16 = 0x00010000, + RIC0_FRE17 = 0x00020000, +}; + +/* RIC0 */ +enum RIS0_BIT { + RIS0_FRF0 = 0x00000001, + RIS0_FRF1 = 0x00000002, + RIS0_FRF2 = 0x00000004, + RIS0_FRF3 = 0x00000008, + RIS0_FRF4 = 0x00000010, + RIS0_FRF5 = 0x00000020, + RIS0_FRF6 = 0x00000040, + RIS0_FRF7 = 0x00000080, + RIS0_FRF8 = 0x00000100, + RIS0_FRF9 = 0x00000200, + RIS0_FRF10 = 0x00000400, + RIS0_FRF11 = 0x00000800, + RIS0_FRF12 = 0x00001000, + RIS0_FRF13 = 0x00002000, + RIS0_FRF14 = 0x00004000, + RIS0_FRF15 = 0x00008000, + RIS0_FRF16 = 0x00010000, + RIS0_FRF17 = 0x00020000, +}; + +/* RIC1 */ +enum RIC1_BIT { + RIC1_RFWE = 0x80000000, +}; + +/* RIS1 */ +enum RIS1_BIT { + RIS1_RFWF = 0x80000000, +}; + +/* RIC2 */ +enum RIC2_BIT { + RIC2_QFE0 = 0x00000001, + RIC2_QFE1 = 0x00000002, + RIC2_QFE2 = 0x00000004, + RIC2_QFE3 = 0x00000008, + RIC2_QFE4 = 0x00000010, + RIC2_QFE5 = 0x00000020, + RIC2_QFE6 = 0x00000040, + RIC2_QFE7 = 0x00000080, + RIC2_QFE8 = 0x00000100, + RIC2_QFE9 = 0x00000200, + RIC2_QFE10 = 0x00000400, + RIC2_QFE11 = 0x00000800, + RIC2_QFE12 = 0x00001000, + RIC2_QFE13 = 0x00002000, + RIC2_QFE14 = 0x00004000, + RIC2_QFE15 = 0x00008000, + RIC2_QFE16 = 0x00010000, + RIC2_QFE17 = 0x00020000, + RIC2_RFFE = 0x80000000, +}; + +/* RIS2 */ +enum RIS2_BIT { + RIS2_QFF0 = 0x00000001, + RIS2_QFF1 = 0x00000002, + RIS2_QFF2 = 0x00000004, + RIS2_QFF3 = 0x00000008, + RIS2_QFF4 = 0x00000010, + RIS2_QFF5 = 0x00000020, + RIS2_QFF6 = 0x00000040, + RIS2_QFF7 = 0x00000080, + RIS2_QFF8 = 0x00000100, + RIS2_QFF9 = 0x00000200, + RIS2_QFF10 = 0x00000400, + RIS2_QFF11 = 0x00000800, + RIS2_QFF12 = 0x00001000, + RIS2_QFF13 = 0x00002000, + RIS2_QFF14 = 0x00004000, + RIS2_QFF15 = 0x00008000, + RIS2_QFF16 = 0x00010000, + RIS2_QFF17 = 0x00020000, + RIS2_RFFF = 0x80000000, +}; + +/* TIC */ +enum TIC_BIT { + TIC_FTE0 = 0x00000001, /* Undocumented? */ + TIC_FTE1 = 0x00000002, /* Undocumented? */ + TIC_TFUE = 0x00000100, + TIC_TFWE = 0x00000200, +}; + +/* TIS */ +enum TIS_BIT { + TIS_FTF0 = 0x00000001, /* Undocumented? */ + TIS_FTF1 = 0x00000002, /* Undocumented? */ + TIS_TFUF = 0x00000100, + TIS_TFWF = 0x00000200, +}; + +/* ISS */ +enum ISS_BIT { + ISS_FRS = 0x00000001, /* Undocumented? */ + ISS_FTS = 0x00000004, /* Undocumented? */ + ISS_ES = 0x00000040, + ISS_MS = 0x00000080, + ISS_TFUS = 0x00000100, + ISS_TFWS = 0x00000200, + ISS_RFWS = 0x00001000, + ISS_CGIS = 0x00002000, + ISS_DPS1 = 0x00020000, + ISS_DPS2 = 0x00040000, + ISS_DPS3 = 0x00080000, + ISS_DPS4 = 0x00100000, + ISS_DPS5 = 0x00200000, + ISS_DPS6 = 0x00400000, + ISS_DPS7 = 0x00800000, + ISS_DPS8 = 0x01000000, + ISS_DPS9 = 0x02000000, + ISS_DPS10 = 0x04000000, + ISS_DPS11 = 0x08000000, + ISS_DPS12 = 0x10000000, + ISS_DPS13 = 0x20000000, + ISS_DPS14 = 0x40000000, + ISS_DPS15 = 0x80000000, +}; + +/* GCCR */ +enum GCCR_BIT { + GCCR_TCR = 0x00000003, + GCCR_TCR_NOREQ = 0x00000000, /* No request */ + GCCR_TCR_RESET = 0x00000001, /* gPTP/AVTP presentation timer reset */ + GCCR_TCR_CAPTURE = 0x00000003, /* Capture value set in GCCR.TCSS */ + GCCR_LTO = 0x00000004, + GCCR_LTI = 0x00000008, + GCCR_LPTC = 0x00000010, + GCCR_LMTT = 0x00000020, + GCCR_TCSS = 0x00000300, + GCCR_TCSS_GPTP = 0x00000000, /* gPTP timer value */ + GCCR_TCSS_ADJGPTP = 0x00000100, /* Adjusted gPTP timer value */ + GCCR_TCSS_AVTP = 0x00000200, /* AVTP presentation time value */ +}; + +/* GTI */ +enum GTI_BIT { + GTI_TIV = 0x0FFFFFFF, +}; + +/* GIC */ +enum GIC_BIT { + GIC_PTCE = 0x00000001, /* Undocumented? */ + GIC_PTME = 0x00000004, +}; + +/* GIS */ +enum GIS_BIT { + GIS_PTCF = 0x00000001, /* Undocumented? */ + GIS_PTMF = 0x00000004, +}; + +/* ECMR */ +enum ECMR_BIT { + ECMR_PRM = 0x00000001, + ECMR_DM = 0x00000002, + ECMR_TE = 0x00000020, + ECMR_RE = 0x00000040, + ECMR_MPDE = 0x00000200, + ECMR_TXF = 0x00010000, /* Undocumented? */ + ECMR_RXF = 0x00020000, + ECMR_PFR = 0x00040000, + ECMR_ZPF = 0x00080000, /* Undocumented? */ + ECMR_RZPF = 0x00100000, + ECMR_DPAD = 0x00200000, + ECMR_RCSC = 0x00800000, + ECMR_TRCCM = 0x04000000, +}; + +/* ECSR */ +enum ECSR_BIT { + ECSR_ICD = 0x00000001, + ECSR_MPD = 0x00000002, + ECSR_LCHNG = 0x00000004, + ECSR_PHYI = 0x00000008, +}; + +/* ECSIPR */ +enum ECSIPR_BIT { + ECSIPR_ICDIP = 0x00000001, + ECSIPR_MPDIP = 0x00000002, + ECSIPR_LCHNGIP = 0x00000004, /* Undocumented? */ +}; + +/* PIR */ +enum PIR_BIT { + PIR_MDC = 0x00000001, + PIR_MMD = 0x00000002, + PIR_MDO = 0x00000004, + PIR_MDI = 0x00000008, +}; + +/* PSR */ +enum PSR_BIT { + PSR_LMON = 0x00000001, +}; + +/* PIPR */ +enum PIPR_BIT { + PIPR_PHYIP = 0x00000001, +}; + +/* MPR */ +enum MPR_BIT { + MPR_MP = 0x0000ffff, +}; + +/* GECMR */ +enum GECMR_BIT { + GECMR_SPEED = 0x00000001, + GECMR_SPEED_100 = 0x00000000, + GECMR_SPEED_1000 = 0x00000001, +}; + +/* The Ethernet AVB descriptor definitions. */ +enum DT { + /* Frame data */ + DT_FMID = 4, + DT_FSTART = 5, + DT_FEND = 6, + DT_FSINGLE = 7, + /* Chain control */ + DT_LINK = 8, + DT_LINKFIX = 9, + DT_EOS = 10, + /* HW/SW arbitration */ + DT_FEMPTY = 12, + DT_FEMPTY_IS = 13, + DT_FEMPTY_IC = 14, + DT_FEMPTY_ND = 15, + DT_LEMPTY = 2, + DT_EEMPTY = 3, + /* 0, 1, 11 are reserved */ +}; + +struct ravb_desc { +#ifdef __LITTLE_ENDIAN + u32 ds: 12; /* Descriptor size */ + u32 cc: 12; /* Content control */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 dt: 4; /* Descriptor type */ +#else + u32 dt: 4; /* Descriptor type */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 cc: 12; /* Content control */ + u32 ds: 12; /* Descriptor size */ +#endif + u32 dptr; /* Descriptor pointer */ +}; + +struct ravb_rx_desc { +#ifdef __LITTLE_ENDIAN + u32 ds: 12; /* Descriptor size */ + u32 ei: 1; /* Error indication */ + u32 ps: 2; /* Padding selection */ + u32 tr: 1; /* Truncation indication */ + u32 msc: 8; /* MAC status code */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 dt: 4; /* Descriptor type */ +#else + u32 dt: 4; /* Descriptor type */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 msc: 8; /* MAC status code */ + u32 ps: 2; /* Padding selection */ + u32 ei: 1; /* Error indication */ + u32 tr: 1; /* Truncation indication */ + u32 ds: 12; /* Descriptor size */ +#endif + u32 dptr; /* Descpriptor pointer */ +}; + +struct ravb_ex_rx_desc { +#ifdef __LITTLE_ENDIAN + u32 ds: 12; /* Descriptor size */ + u32 ei: 1; /* Error indication */ + u32 ps: 2; /* Padding selection */ + u32 tr: 1; /* Truncation indication */ + u32 msc: 8; /* MAC status code */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 dt: 4; /* Descriptor type */ +#else + u32 dt: 4; /* Descriptor type */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 msc: 8; /* MAC status code */ + u32 ps: 2; /* Padding selection */ + u32 ei: 1; /* Error indication */ + u32 tr: 1; /* Truncation indication */ + u32 ds: 12; /* Descriptor size */ +#endif + u32 dptr; /* Descpriptor pointer */ + u32 ts_n; /* Timestampe nsec */ + u32 ts_sl; /* Timestamp low */ +#ifdef __LITTLE_ENDIAN + u32 res: 16; /* Reserved bits */ + u32 ts_sh: 16; /* Timestamp high */ +#else + u32 ts_sh: 16; /* Timestamp high */ + u32 res: 16; /* Reserved bits */ +#endif +}; + +/* E-MAC status code */ +enum MSC_BIT { + MSC_CRC = 0x01, /* Frame CRC error */ + MSC_RFE = 0x02, /* Frame reception error (flagged by PHY) */ + MSC_RTSF = 0x04, /* Frame length error (frame too short) */ + MSC_RTLF = 0x08, /* Frame length error (frame too long) */ + MSC_FRE = 0x10, /* Fraction error (not a multiple of 8 bits) */ + MSC_CRL = 0x20, /* Carrier lost */ + MSC_CEEF = 0x40, /* Carrier extension error */ + MSC_MC = 0x80, /* Multicast frame reception */ +}; + +struct ravb_tx_desc { +#ifdef __LITTLE_ENDIAN + u32 ds: 12; /* Descriptor size */ + u32 tag: 10; /* Frame tag */ + u32 tsr: 1; /* Timestamp storage request */ + u32 msc: 1; /* MAC status storage request */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 dt: 4; /* Descriptor type */ +#else + u32 dt: 4; /* Descriptor type */ + u32 die: 4; /* Descriptor interrupt enable */ + /* 0: disable, other: enable */ + u32 msc: 1; /* MAC status storage request */ + u32 tsr: 1; /* Timestamp storage request */ + u32 tag: 10; /* Frame tag */ + u32 ds: 12; /* Descriptor size */ +#endif + u32 dptr; /* Descpriptor pointer */ +}; + +#define DBAT_ENTRY_NUM 22 +#define RX_QUEUE_OFFSET 4 +#define NUM_RX_QUEUE 2 +#define NUM_TX_QUEUE 2 + +enum RAVB_QUEUE { + RAVB_BE = 0, /* Best Effort Queue */ + RAVB_NC, /* Network Control Queue */ +}; + +struct ravb_tstamp_skb { + struct list_head list; + struct sk_buff *skb; + u16 tag; +}; + +struct ravb_ptp_perout { + u32 target; + u32 period; +}; + +#define N_EXT_TS 1 +#define N_PER_OUT 1 + +struct ravb_ptp { + struct ptp_clock *clock; + struct ptp_clock_info info; + u32 default_addend; + u32 current_addend; + int extts[N_EXT_TS]; + struct ravb_ptp_perout perout[N_PER_OUT]; +}; + +struct ravb_private { + struct net_device *ndev; + struct platform_device *pdev; + void __iomem *addr; + struct mdiobb_ctrl mdiobb; + u32 num_rx_ring[NUM_RX_QUEUE]; + u32 num_tx_ring[NUM_TX_QUEUE]; + u32 desc_bat_size; + dma_addr_t desc_bat_dma; + struct ravb_desc *desc_bat; + dma_addr_t rx_desc_dma[NUM_RX_QUEUE]; + dma_addr_t tx_desc_dma[NUM_TX_QUEUE]; + struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE]; + struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE]; + struct sk_buff **rx_skb[NUM_RX_QUEUE]; + struct sk_buff **tx_skb[NUM_TX_QUEUE]; + void **tx_buffers[NUM_TX_QUEUE]; + u32 rx_over_errors; + u32 rx_fifo_errors; + struct net_device_stats stats[NUM_RX_QUEUE]; + u32 tstamp_tx_ctrl; + u32 tstamp_rx_ctrl; + struct list_head ts_skb_list; + u32 ts_skb_tag; + struct ravb_ptp ptp; + spinlock_t lock; /* Register access lock */ + u32 cur_rx[NUM_RX_QUEUE]; /* Consumer ring indices */ + u32 dirty_rx[NUM_RX_QUEUE]; /* Producer ring indices */ + u32 cur_tx[NUM_TX_QUEUE]; + u32 dirty_tx[NUM_TX_QUEUE]; + u32 rx_buffer_size; /* Based on MTU+slack. */ + int edmac_endian; + struct napi_struct napi; + /* MII transceiver section. */ + struct mii_bus *mii_bus; /* MDIO bus control */ + struct phy_device *phydev; /* PHY device control */ + int link; + phy_interface_t phy_interface; + int msg_enable; + int speed; + int duplex; + + unsigned no_avb_link:1; + unsigned avb_link_active_low:1; +}; + +#define RAVB_DEF_MSG_ENABLE \ + (NETIF_MSG_LINK | \ + NETIF_MSG_TIMER | \ + NETIF_MSG_RX_ERR | \ + NETIF_MSG_TX_ERR) + +static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg) +{ + struct ravb_private *priv = netdev_priv(ndev); + + return ioread32(priv->addr + reg); +} + +static inline void ravb_write(struct net_device *ndev, u32 data, + enum ravb_reg reg) +{ + struct ravb_private *priv = netdev_priv(ndev); + + iowrite32(data, priv->addr + reg); +} + +/* There is CPU dependent code */ +static int ravb_wait_clear(struct net_device *ndev, u16 reg, u32 bits) +{ + int i; + + for (i = 0; i < 100; i++) { + if (!(ravb_read(ndev, reg) & bits)) + break; + mdelay(1); + } + if (i >= 100) + return -ETIMEDOUT; + + return 0; +} + +static int ravb_wait_setting(struct net_device *ndev, u16 reg, u32 bits) +{ + int i; + + for (i = 0; i < 100; i++) { + if (ravb_read(ndev, reg) & bits) + break; + mdelay(1); + } + if (i >= 100) + return -ETIMEDOUT; + + return 0; +} + +static int ravb_reset(struct net_device *ndev) +{ + int result; + + /* set config mode */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, + CCC); + /* check the operating mode is changed to the config mode */ + result = ravb_wait_setting(ndev, CSR, CSR_OPS_CONFIG); + if (result < 0) + netdev_err(ndev, "Device reset failed\n"); + + return result; +} + +static void ravb_set_duplex(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + if (priv->duplex) /* Full */ + ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_DM, ECMR); + else /* Half */ + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_DM, ECMR); +} + +static void ravb_set_rate(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + switch (priv->speed) { + case 100: /* 100BASE */ + ravb_write(ndev, GECMR_SPEED_100, GECMR); + break; + case 1000: /* 1000BASE */ + ravb_write(ndev, GECMR_SPEED_1000, GECMR); + break; + default: + break; + } +} + +static void ravb_set_buffer_align(struct sk_buff *skb) +{ + u32 reserve = (u32)skb->data & (RAVB_ALIGN - 1); + + if (reserve) + skb_reserve(skb, RAVB_ALIGN - reserve); +} + +/* Program the hardware MAC address from dev->dev_addr. */ +static void update_mac_address(struct net_device *ndev) +{ + ravb_write(ndev, + (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) | + (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR); + ravb_write(ndev, + (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR); +} + +/* Get MAC address from the MAC address registers + * + * Ethernet AVB device doesn't have ROM for MAC address. + * This function gets the MAC address that was used by a bootloader. + */ +static void read_mac_address(struct net_device *ndev, const u8 *mac) +{ + if (mac) { + ether_addr_copy(ndev->dev_addr, mac); + } else { + ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24); + ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF; + ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF; + ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF; + ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF; + ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF; + } +} + +static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set) +{ + struct ravb_private *priv = container_of(ctrl, struct ravb_private, + mdiobb); + u32 pir = ravb_read(priv->ndev, PIR); + + if (set) + pir |= mask; + else + pir &= ~mask; + ravb_write(priv->ndev, pir, PIR); +} + +/* MDC pin control */ +static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level) +{ + ravb_mdio_ctrl(ctrl, PIR_MDC, level); +} + +/* Data I/O pin control */ +static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output) +{ + ravb_mdio_ctrl(ctrl, PIR_MMD, output); +} + +/* Set data bit */ +static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value) +{ + ravb_mdio_ctrl(ctrl, PIR_MDO, value); +} + +/* Get data bit */ +static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl) +{ + struct ravb_private *priv = container_of(ctrl, struct ravb_private, + mdiobb); + + return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0; +} + +/* MDIO bus control struct */ +static struct mdiobb_ops bb_ops = { + .owner = THIS_MODULE, + .set_mdc = ravb_set_mdc, + .set_mdio_dir = ravb_set_mdio_dir, + .set_mdio_data = ravb_set_mdio_data, + .get_mdio_data = ravb_get_mdio_data, +}; + +/* Free skb and buffers for Ethernet AVB */ +static void ravb_ring_free(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int i; + + /* Free RX skb ringbuffer */ + if (priv->rx_skb[q]) { + for (i = 0; i < priv->num_rx_ring[q]; i++) + dev_kfree_skb(priv->rx_skb[q][i]); + } + kfree(priv->rx_skb[q]); + priv->rx_skb[q] = NULL; + + /* Free TX skb ringbuffer */ + if (priv->tx_skb[q]) { + for (i = 0; i < priv->num_tx_ring[q]; i++) + dev_kfree_skb(priv->tx_skb[q][i]); + } + kfree(priv->tx_skb[q]); + priv->tx_skb[q] = NULL; + + /* Free aligned TX buffers */ + if (priv->tx_buffers[q]) { + for (i = 0; i < priv->num_tx_ring[q]; i++) + kfree(priv->tx_buffers[q][i]); + } + kfree(priv->tx_buffers[q]); + priv->tx_buffers[q] = NULL; +} + +/* Format skb and descriptor buffer for Ethernet AVB */ +static void ravb_ring_format(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_ex_rx_desc *rx_desc = NULL; + struct ravb_tx_desc *tx_desc = NULL; + struct ravb_desc *desc = NULL; + int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q]; + int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q]; + int buffer_size = priv->rx_buffer_size + RAVB_ALIGN - 1; + struct sk_buff *skb; + dma_addr_t dma_addr; + void *buffer; + int i; + + priv->cur_rx[q] = 0; + priv->cur_tx[q] = 0; + priv->dirty_rx[q] = 0; + priv->dirty_tx[q] = 0; + memset(priv->rx_ring[q], 0, rx_ring_size); + /* Build RX ring buffer */ + for (i = 0; i < priv->num_rx_ring[q]; i++) { + priv->rx_skb[q][i] = NULL; + skb = netdev_alloc_skb(ndev, buffer_size); + if (!skb) + break; + ravb_set_buffer_align(skb); + /* RX descriptor */ + rx_desc = &priv->rx_ring[q][i]; + /* The size of the buffer should be on 16-byte boundary. */ + rx_desc->ds = ALIGN(priv->rx_buffer_size, 16); + dma_addr = dma_map_single(&ndev->dev, skb->data, rx_desc->ds, + DMA_FROM_DEVICE); + if (dma_mapping_error(&ndev->dev, dma_addr)) { + dev_kfree_skb(skb); + break; + } + priv->rx_skb[q][i] = skb; + rx_desc->dptr = dma_addr; + rx_desc->dt = DT_FEMPTY; + } + rx_desc = &priv->rx_ring[q][i]; + rx_desc->dptr = (u32)priv->rx_desc_dma[q]; + rx_desc->dt = DT_LINKFIX; /* type */ + priv->dirty_rx[q] = (u32)(i - priv->num_rx_ring[q]); + + memset(priv->tx_ring[q], 0, tx_ring_size); + /* Build TX ring buffer */ + for (i = 0; i < priv->num_tx_ring[q]; i++) { + priv->tx_skb[q][i] = NULL; + priv->tx_buffers[q][i] = NULL; + buffer = kmalloc(buffer_size, GFP_ATOMIC); + if (!buffer) + break; + /* Aligned TX buffer */ + priv->tx_buffers[q][i] = buffer; + tx_desc = &priv->tx_ring[q][i]; + tx_desc->dt = DT_EEMPTY; + } + tx_desc = &priv->tx_ring[q][i]; + tx_desc->dptr = (u32)priv->tx_desc_dma[q]; + tx_desc->dt = DT_LINKFIX; /* type */ + + /* RX descriptor base address for best effort */ + desc = &priv->desc_bat[RX_QUEUE_OFFSET + q]; + desc->dt = DT_LINKFIX; /* type */ + desc->dptr = (u32)priv->rx_desc_dma[q]; + + /* TX descriptor base address for best effort */ + desc = &priv->desc_bat[q]; + desc->dt = DT_LINKFIX; /* type */ + desc->dptr = (u32)priv->tx_desc_dma[q]; +} + +/* Init skb and descriptor buffer for Ethernet AVB */ +static int ravb_ring_init(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int rx_ring_size = 0, tx_ring_size; + + /* Allocate RX and TX skb rings */ + priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q], + sizeof(*priv->rx_skb[q]), GFP_KERNEL); + priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q], + sizeof(*priv->tx_skb[q]), GFP_KERNEL); + if (!priv->rx_skb[q] || !priv->tx_skb[q]) + goto skb_ring_free; + + /* Allocate rings for the aligned buffers */ + priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q], + sizeof(*priv->tx_buffers[q]), GFP_KERNEL); + if (!priv->tx_buffers[q]) + goto skb_ring_free; + + /* Allocate all RX descriptors. */ + rx_ring_size = sizeof(struct ravb_ex_rx_desc) * + (priv->num_rx_ring[q] + 1); + priv->rx_ring[q] = dma_alloc_coherent(NULL, rx_ring_size, + &priv->rx_desc_dma[q], + GFP_KERNEL); + if (!priv->rx_ring[q]) + goto skb_ring_free; + + priv->dirty_rx[q] = 0; + + /* Allocate all TX descriptors. */ + tx_ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1); + priv->tx_ring[q] = dma_alloc_coherent(NULL, tx_ring_size, + &priv->tx_desc_dma[q], + GFP_KERNEL); + if (!priv->tx_ring[q]) + goto desc_ring_free; + + return 0; + +desc_ring_free: + /* Free DMA buffer */ + dma_free_coherent(NULL, rx_ring_size, + priv->rx_ring[q], priv->rx_desc_dma[q]); + +skb_ring_free: + /* Free RX and TX skb ring buffer */ + ravb_ring_free(ndev, q); + priv->tx_ring[q] = NULL; + priv->rx_ring[q] = NULL; + + return -ENOMEM; +} + +static void ravb_free_dma_buffer(struct ravb_private *priv) +{ + int ring_size; + int q; + + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { + if (priv->rx_ring[q]) { + ring_size = sizeof(struct ravb_ex_rx_desc) * + (priv->num_rx_ring[q] + 1); + dma_free_coherent(NULL, ring_size, priv->rx_ring[q], + priv->rx_desc_dma[q]); + priv->rx_ring[q] = NULL; + } + } + + for (q = RAVB_BE; q < NUM_TX_QUEUE; q++) { + if (priv->tx_ring[q]) { + ring_size = sizeof(struct ravb_tx_desc) * + (priv->num_tx_ring[q] + 1); + dma_free_coherent(NULL, ring_size, priv->tx_ring[q], + priv->tx_desc_dma[q]); + priv->tx_ring[q] = NULL; + } + } +} + +/* E-MAC init function */ +static void ravb_mac_init(struct net_device *ndev, bool start) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 val; + + /* Receive frame limit set register */ + ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR); + + /* PAUSE prohibition */ + val = (ravb_read(ndev, ECMR) & ECMR_DM) | ECMR_ZPF | + (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; + + ravb_write(ndev, val, ECMR); + + ravb_set_rate(ndev); + + /* Set MAC address */ + update_mac_address(ndev); + + ravb_write(ndev, 1, MPR); + + /* E-MAC status register clear */ + ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR); + + /* E-MAC interrupt enable register */ + if (start) { + ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, + ECSIPR); + netif_start_queue(ndev); + } +} + +/* Device init function for Ethernet AVB */ +static int ravb_dmac_init(struct net_device *ndev, bool start) +{ + int result; + + /* Set CONFIG mode */ + result = ravb_reset(ndev); + if (result) + return result; + + /* Descriptor format */ + ravb_ring_format(ndev, RAVB_BE); + ravb_ring_format(ndev, RAVB_NC); + + /* Disable all interrupts */ + ravb_write(ndev, 0, RIC0); + ravb_write(ndev, 0, RIC1); + ravb_write(ndev, 0, RIC2); + ravb_write(ndev, 0, TIC); + +#if defined(__LITTLE_ENDIAN) + ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC); +#else + ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC); +#endif + + /* Set AVB RX */ + ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | 0x18000000, RCR); + + /* Set FIFO size */ + ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00222200, TGC); + + /* Timestamp enable */ + ravb_write(ndev, TCCR_TFEN, TCCR); + + /* Interrupt enable */ + if (start) { + /* Frame receive */ + ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0); + /* Receive FIFO full warning */ + ravb_write(ndev, RIC1_RFWE, RIC1); + /* Receive FIFO full error, descriptor empty */ + ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2); + /* Frame transmited, timestamp FIFO updated */ + ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC); + + /* Setting the control will start the AVB-DMAC process. */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | + CCC_OPC_OPERATION, CCC); + netif_start_queue(ndev); + } + + return 0; +} + +/* Free TX skb function for AVB-IP */ +static int ravb_tx_free(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct net_device_stats *stats = &priv->stats[q]; + struct ravb_tx_desc *desc; + int free_num = 0; + int entry = 0; + + for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) { + entry = priv->dirty_tx[q] % priv->num_tx_ring[q]; + desc = &priv->tx_ring[q][entry]; + if (desc->dt != DT_FEMPTY) + break; + + /* Free the original skb. */ + if (priv->tx_skb[q][entry]) { + dma_unmap_single(&ndev->dev, desc->dptr, desc->ds, + DMA_TO_DEVICE); + dev_kfree_skb_any(priv->tx_skb[q][entry]); + priv->tx_skb[q][entry] = NULL; + free_num++; + } + stats->tx_packets++; + stats->tx_bytes += desc->ds; + desc->dt = DT_EEMPTY; + } + return free_num; +} + +static void ravb_get_tx_tstamp(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb, *ts_skb1; + struct skb_shared_hwtstamps shhwtstamps; + struct sk_buff *skb; + struct timespec ts; + u16 tag, tfa_tag; + int count; + u32 tfa2; + + count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8; + while (count--) { + tfa2 = ravb_read(ndev, TFA2); + tfa_tag = (tfa2 & TFA2_TST) >> 16; + ts.tv_nsec = (u64)ravb_read(ndev, TFA0); + ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) | + ravb_read(ndev, TFA1); + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); + shhwtstamps.hwtstamp = timespec_to_ktime(ts); + list_for_each_entry_safe(ts_skb, + ts_skb1, &priv->ts_skb_list, list) { + skb = ts_skb->skb; + tag = ts_skb->tag; + list_del(&ts_skb->list); + kfree(ts_skb); + if (tag == tfa_tag) { + skb_tstamp_tx(skb, &shhwtstamps); + break; + } + } + ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR); + } +} + +/* Packet receive function for Ethernet AVB */ +static int ravb_rx(struct net_device *ndev, u32 ris0, int *quota, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int entry = priv->cur_rx[q] % priv->num_rx_ring[q]; + int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) - + priv->cur_rx[q]; + struct net_device_stats *stats = &priv->stats[q]; + int skb_size = priv->rx_buffer_size + RAVB_ALIGN - 1; + struct ravb_ex_rx_desc *desc; + struct sk_buff *skb; + dma_addr_t dma_addr; + struct timespec ts; + u16 pkt_len = 0; + u8 desc_status; + int limit; + + if (quota) + boguscnt = min(boguscnt, *quota); + limit = boguscnt; + desc = &priv->rx_ring[q][entry]; + while (desc->dt != DT_FEMPTY) { + desc_status = desc->msc; + pkt_len = desc->ds; + + if (--boguscnt < 0) + break; + + if (desc_status & MSC_MC) + stats->multicast++; + + if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | + MSC_CEEF)) { + stats->rx_errors++; + if (desc_status & MSC_CRC) + stats->rx_crc_errors++; + if (desc_status & MSC_RFE) + stats->rx_frame_errors++; + if (desc_status & (MSC_RTLF | MSC_RTSF)) + stats->rx_length_errors++; + if (desc_status & MSC_CEEF) + stats->rx_missed_errors++; + } else { + u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE; + + skb = priv->rx_skb[q][entry]; + priv->rx_skb[q][entry] = NULL; + dma_sync_single_for_cpu(&ndev->dev, desc->dptr, + ALIGN(priv->rx_buffer_size, 16), + DMA_FROM_DEVICE); + get_ts &= (q == RAVB_NC) ? + RAVB_RXTSTAMP_TYPE_V2_L2_EVENT : + ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; + if (get_ts) { + struct skb_shared_hwtstamps *shhwtstamps; + + shhwtstamps = skb_hwtstamps(skb); + memset(shhwtstamps, 0, sizeof(*shhwtstamps)); + ts.tv_sec = ((u64)desc->ts_sh << 32) | + desc->ts_sl; + ts.tv_nsec = (u64)desc->ts_n; + shhwtstamps->hwtstamp = timespec_to_ktime(ts); + } + skb_put(skb, pkt_len); + skb->protocol = eth_type_trans(skb, ndev); + if (q == RAVB_NC) + netif_rx(skb); + else + netif_receive_skb(skb); + stats->rx_packets++; + stats->rx_bytes += pkt_len; + } + + entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; + desc = &priv->rx_ring[q][entry]; + } + + /* Refill the RX ring buffers. */ + for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { + entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; + desc = &priv->rx_ring[q][entry]; + /* The size of the buffer should be on 16-byte boundary. */ + desc->ds = ALIGN(priv->rx_buffer_size, 16); + + if (!priv->rx_skb[q][entry]) { + skb = netdev_alloc_skb(ndev, skb_size); + if (!skb) + break; /* Better luck next round. */ + ravb_set_buffer_align(skb); + dma_unmap_single(&ndev->dev, desc->dptr, desc->ds, + DMA_FROM_DEVICE); + dma_addr = dma_map_single(&ndev->dev, skb->data, + desc->ds, DMA_FROM_DEVICE); + skb_checksum_none_assert(skb); + if (dma_mapping_error(&ndev->dev, dma_addr)) { + dev_kfree_skb_any(skb); + break; + } + desc->dptr = dma_addr; + priv->rx_skb[q][entry] = skb; + } + desc->dt = DT_FEMPTY; + } + + if (quota) + *quota -= limit - (++boguscnt); + + return boguscnt <= 0; +} + +static void ravb_rcv_snd_disable(struct net_device *ndev) +{ + /* Disable TX and RX */ + ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR); +} + +static void ravb_rcv_snd_enable(struct net_device *ndev) +{ + /* Enable TX and RX */ + ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR); +} + +/* function for waiting dma process finished */ +static void ravb_wait_stop_dma(struct net_device *ndev) +{ + /* Wait for stopping the hardware TX process */ + ravb_wait_clear(ndev, TCCR, + TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3); + + ravb_wait_clear(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3); + + /* Stop the E-MAC's RX processes. */ + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_RE, ECMR); + + /* Wait for stopping the RX DMA process */ + ravb_wait_clear(ndev, CSR, CSR_RPO); +} + +/* Caller must hold the lock */ +static void ravb_ptp_update_compare(struct ravb_private *priv, u32 ns) +{ + struct net_device *ndev = priv->ndev; + /* When the comparison value (GPTC.PTCV) is in range of + * [x-1 to x+1] (x is the configured increment value in + * GTI.TIV), it may happen that a comparison match is + * not detected when the timer wraps around. + */ + u32 gti_ns_plus_1 = (priv->ptp.current_addend >> 20) + 1; + + if (ns < gti_ns_plus_1) + ns = gti_ns_plus_1; + else if (ns > 0 - gti_ns_plus_1) + ns = 0 - gti_ns_plus_1; + + ravb_write(ndev, ns, GPTC); + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LPTC, GCCR); + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) + while (ravb_read(ndev, GCCR) & GCCR_LPTC) + ; +} + +/* E-MAC interrupt handler */ +static void ravb_emac_interrupt(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 ecsr, psr; + + ecsr = ravb_read(ndev, ECSR); + ravb_write(ndev, ecsr, ECSR); /* clear interrupt */ + if (ecsr & ECSR_ICD) + ndev->stats.tx_carrier_errors++; + if (ecsr & ECSR_LCHNG) { + /* Link changed */ + if (priv->no_avb_link) + return; + psr = ravb_read(ndev, PSR); + if (priv->avb_link_active_low) + psr ^= PSR_LMON; + if (!(psr & PSR_LMON)) { + /* DIsable RX and TX */ + ravb_rcv_snd_disable(ndev); + } else { + /* Enable RX and TX */ + ravb_rcv_snd_enable(ndev); + } + } +} + +/* Error interrupt handler */ +static void ravb_error_interrupt(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 eis, ris2; + + eis = ravb_read(ndev, EIS); + ravb_write(ndev, ~EIS_QFS, EIS); + if (eis & EIS_QFS) { + ris2 = ravb_read(ndev, RIS2); + ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF), RIS2); + + /* Receive Descriptor Empty int */ + if (ris2 & RIS2_QFF0) + priv->stats[RAVB_BE].rx_over_errors++; + + /* Receive Descriptor Empty int */ + if (ris2 & RIS2_QFF1) + priv->stats[RAVB_NC].rx_over_errors++; + + /* Receive FIFO Overflow int */ + if (ris2 & RIS2_RFFF) + priv->rx_fifo_errors++; + } +} + +static irqreturn_t ravb_interrupt(int irq, void *dev_id) +{ + struct net_device *ndev = dev_id; + struct ravb_private *priv = netdev_priv(ndev); + irqreturn_t result = IRQ_NONE; + u32 iss; + + spin_lock(&priv->lock); + /* Get interrupt status */ + iss = ravb_read(ndev, ISS); + + /* Received and transmited interrupts */ + if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) { + u32 ris0, ric0, tic, tis; + + ris0 = ravb_read(ndev, RIS0); + ric0 = ravb_read(ndev, RIC0); + tis = ravb_read(ndev, TIS); + tic = ravb_read(ndev, TIC); + ravb_write(ndev, ~(TIS_FTF1 | TIS_TFUF), TIS); + + /* Received network control queue */ + if (ris0 & RIS0_FRF1) { + ravb_write(ndev, ~RIS0_FRF1, RIS0); + /* Timestamp of network control packets that is based + * on IEEE802.1AS, is used time synchronization of PTP. + * It should not be handled by NAPI scheduling, because + * it needs to be received as soon as possible. + */ + ravb_rx(ndev, ris0, NULL, RAVB_NC); + result = IRQ_HANDLED; + } + + /* Timestamp updated */ + if (tis & TIS_TFUF) { + ravb_get_tx_tstamp(ndev); + result = IRQ_HANDLED; + } + + /* Transmited network control queue */ + if (tis & TIS_FTF1) { + ravb_tx_free(ndev, RAVB_NC); + netif_wake_queue(ndev); + result = IRQ_HANDLED; + } + + /* Received and transmited best effort queue */ + if (((ris0 & ric0) & RIS0_FRF0) || ((tis & tic) & TIS_FTF0)) { + if (napi_schedule_prep(&priv->napi)) { + /* Mask RX and TX interrupts */ + ravb_write(ndev, ric0 & ~RIC0_FRE0, RIC0); + ravb_write(ndev, tic & ~TIC_FTE0, TIC); + __napi_schedule(&priv->napi); + } else { + netdev_warn(ndev, + "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n", + ris0, ric0); + netdev_warn(ndev, + " tx status 0x%08x, tx mask 0x%08x.\n", + tis, tic); + } + result = IRQ_HANDLED; + } + } + + /* E-MAC status summary */ + if (iss & ISS_MS) { + ravb_emac_interrupt(ndev); + result = IRQ_HANDLED; + } + + /* Error status summary */ + if (iss & ISS_ES) { + ravb_error_interrupt(ndev); + result = IRQ_HANDLED; + } + + if (iss & ISS_CGIS) { + u32 gis = ravb_read(ndev, GIS); + + gis &= ravb_read(ndev, GIC); + if (gis & GIS_PTCF) { + struct ptp_clock_event event; + + event.type = PTP_CLOCK_EXTTS; + event.index = 0; + event.timestamp = ravb_read(ndev, GCPT); + ptp_clock_event(priv->ptp.clock, &event); + } + if (gis & GIS_PTMF) { + struct ravb_ptp_perout *perout = priv->ptp.perout; + + if (perout->period) { + perout->target += perout->period; + ravb_ptp_update_compare(priv, perout->target); + } + } + + if (gis) { + ravb_write(ndev, ~gis, GIS); + result = IRQ_HANDLED; + } + } + + spin_unlock(&priv->lock); + return result; +} + +static int ravb_poll(struct napi_struct *napi, int budget) +{ + struct ravb_private *priv = container_of(napi, struct ravb_private, + napi); + struct net_device *ndev = napi->dev; + unsigned long flags; + int quota = budget; + u32 ris0, tis; + + for (;;) { + tis = ravb_read(ndev, TIS); + ris0 = ravb_read(ndev, RIS0); + if (!((ris0 & RIS0_FRF0) || (tis & TIS_FTF0))) + break; + + /* Processing RX Descriptor Ring */ + if ((ris0 & RIS0_FRF0)) { + /* Clear RX interrupt */ + ravb_write(ndev, ~RIS0_FRF0, RIS0); + if (ravb_rx(ndev, ris0, &quota, RAVB_BE)) + goto out; + } + /* Processing TX Descriptor Ring */ + if (tis & TIS_FTF0) { + /* Clear TX interrupt */ + ravb_write(ndev, ~TIS_FTF0, TIS); + spin_lock_irqsave(&priv->lock, flags); + ravb_tx_free(ndev, RAVB_BE); + if (netif_queue_stopped(ndev)) + netif_wake_queue(ndev); + spin_unlock_irqrestore(&priv->lock, flags); + } + } + + napi_complete(napi); + + /* Re-enable RX interrupts */ + spin_lock_irqsave(&priv->lock, flags); + ravb_write(ndev, ravb_read(ndev, RIC0) | RIC0_FRE0, RIC0); + ravb_write(ndev, ravb_read(ndev, TIC) | TIC_FTE0, TIC); + spin_unlock_irqrestore(&priv->lock, flags); + + /* Receive error message handling */ + priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors; + priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors; + if (priv->rx_over_errors != ndev->stats.rx_over_errors) { + ndev->stats.rx_over_errors = priv->rx_over_errors; + netif_err(priv, rx_err, ndev, "Receive Descriptor Empty\n"); + } + if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors) { + ndev->stats.rx_fifo_errors = priv->rx_fifo_errors; + netif_err(priv, rx_err, ndev, "Receive FIFO Overflow\n"); + } +out: + return budget - quota; +} + +/* PHY state control function */ +static void ravb_adjust_link(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev = priv->phydev; + int new_state = 0; + + if (phydev->link) { + if (phydev->duplex != priv->duplex) { + new_state = 1; + priv->duplex = phydev->duplex; + ravb_set_duplex(ndev); + } + + if (phydev->speed != priv->speed) { + new_state = 1; + priv->speed = phydev->speed; + ravb_set_rate(ndev); + } + if (!priv->link) { + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF, + ECMR); + new_state = 1; + priv->link = phydev->link; + if (priv->no_avb_link) + ravb_rcv_snd_enable(ndev); + } + } else if (priv->link) { + new_state = 1; + priv->link = 0; + priv->speed = 0; + priv->duplex = -1; + if (priv->no_avb_link) + ravb_rcv_snd_disable(ndev); + } + + if (new_state && netif_msg_link(priv)) + phy_print_status(phydev); +} + +/* PHY init function */ +static int ravb_phy_init(struct net_device *ndev) +{ + struct device_node *np = ndev->dev.parent->of_node; + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev; + struct device_node *pn; + + priv->link = 0; + priv->speed = 0; + priv->duplex = -1; + + /* Try connecting to PHY */ + pn = of_parse_phandle(np, "phy-handle", 0); + phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, + priv->phy_interface); + if (!phydev) { + netdev_err(ndev, "failed to connect PHY\n"); + return -ENOENT; + } + + netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n", + phydev->addr, phydev->irq, phydev->drv->name); + + priv->phydev = phydev; + + return 0; +} + +/* PHY control start function */ +static int ravb_phy_start(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int result; + + result = ravb_phy_init(ndev); + if (result) + return result; + + phy_start(priv->phydev); + + return 0; +} + +static int ravb_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + int result = -ENODEV; + + if (priv->phydev) { + spin_lock_irqsave(&priv->lock, flags); + result = phy_ethtool_gset(priv->phydev, ecmd); + spin_unlock_irqrestore(&priv->lock, flags); + } + + return result; +} + +static int ravb_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + int result; + + if (!priv->phydev) + return -ENODEV; + + spin_lock_irqsave(&priv->lock, flags); + + /* Disable TX and RX */ + ravb_rcv_snd_disable(ndev); + + result = phy_ethtool_sset(priv->phydev, ecmd); + if (result) + goto error_exit; + + if (ecmd->duplex == DUPLEX_FULL) + priv->duplex = 1; + else + priv->duplex = 0; + + ravb_set_duplex(ndev); + +error_exit: + mdelay(1); + + /* Enable TX and RX */ + ravb_rcv_snd_enable(ndev); + + spin_unlock_irqrestore(&priv->lock, flags); + + return result; +} + +static int ravb_nway_reset(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int result = -ENODEV; + unsigned long flags; + + if (priv->phydev) { + spin_lock_irqsave(&priv->lock, flags); + result = phy_start_aneg(priv->phydev); + spin_unlock_irqrestore(&priv->lock, flags); + } + + return result; +} + +static u32 ravb_get_msglevel(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + return priv->msg_enable; +} + +static void ravb_set_msglevel(struct net_device *ndev, u32 value) +{ + struct ravb_private *priv = netdev_priv(ndev); + + priv->msg_enable = value; +} + +static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = { + "rx_queue_0_current", + "tx_queue_0_current", + "rx_queue_0_dirty", + "tx_queue_0_dirty", + "rx_queue_0_packets", + "tx_queue_0_packets", + "rx_queue_0_bytes", + "tx_queue_0_bytes", + "rx_queue_0_mcast_packets", + "rx_queue_0_errors", + "rx_queue_0_crc_errors", + "rx_queue_0_frame_errors", + "rx_queue_0_length_errors", + "rx_queue_0_missed_errors", + "rx_queue_0_over_errors", + + "rx_queue_1_current", + "tx_queue_1_current", + "rx_queue_1_dirty", + "tx_queue_1_dirty", + "rx_queue_1_packets", + "tx_queue_1_packets", + "rx_queue_1_bytes", + "tx_queue_1_bytes", + "rx_queue_1_mcast_packets", + "rx_queue_1_errors", + "rx_queue_1_crc_errors", + "rx_queue_1_frame_errors_", + "rx_queue_1_length_errors", + "rx_queue_1_missed_errors", + "rx_queue_1_over_errors", +}; + +#define RAVB_STATS_LEN ARRAY_SIZE(ravb_gstrings_stats) + +static int ravb_get_sset_count(struct net_device *netdev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return RAVB_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +static void ravb_get_ethtool_stats(struct net_device *ndev, + struct ethtool_stats *stats, u64 *data) +{ + struct ravb_private *priv = netdev_priv(ndev); + int i = 0; + int q; + + /* Device-specific stats */ + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { + struct net_device_stats *stats = &priv->stats[q]; + + data[i++] = priv->cur_rx[q]; + data[i++] = priv->cur_tx[q]; + data[i++] = priv->dirty_rx[q]; + data[i++] = priv->dirty_tx[q]; + data[i++] = stats->rx_packets; + data[i++] = stats->tx_packets; + data[i++] = stats->rx_bytes; + data[i++] = stats->tx_bytes; + data[i++] = stats->multicast; + data[i++] = stats->rx_errors; + data[i++] = stats->rx_crc_errors; + data[i++] = stats->rx_frame_errors; + data[i++] = stats->rx_length_errors; + data[i++] = stats->rx_missed_errors; + data[i++] = stats->rx_over_errors; + } +} + +static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data) +{ + switch (stringset) { + case ETH_SS_STATS: + memcpy(data, *ravb_gstrings_stats, sizeof(ravb_gstrings_stats)); + break; + } +} + +static void ravb_get_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring) +{ + struct ravb_private *priv = netdev_priv(ndev); + + ring->rx_max_pending = BE_RX_RING_MAX; + ring->tx_max_pending = BE_TX_RING_MAX; + ring->rx_pending = priv->num_rx_ring[RAVB_BE]; + ring->tx_pending = priv->num_tx_ring[RAVB_BE]; +} + +static int ravb_set_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring) +{ + struct ravb_private *priv = netdev_priv(ndev); + int result; + + if (ring->tx_pending > BE_TX_RING_MAX || + ring->rx_pending > BE_RX_RING_MAX || + ring->tx_pending < BE_TX_RING_MIN || + ring->rx_pending < BE_RX_RING_MIN) + return -EINVAL; + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + if (netif_running(ndev)) { + netif_tx_disable(ndev); + /* Wait for DMA stopping */ + ravb_wait_stop_dma(ndev); + + /* Stop AVB-DMAC process */ + result = ravb_reset(ndev); + if (result < 0) { + netdev_err(ndev, + "Cannot reset ringparam! Any AVB processes are still running?\n"); + return result; + } + synchronize_irq(ndev->irq); + } + + /* Free all the skbuffs in the RX queue. */ + ravb_ring_free(ndev, RAVB_BE); + ravb_ring_free(ndev, RAVB_NC); + /* Free DMA buffer */ + ravb_free_dma_buffer(priv); + + /* Set new parameters */ + priv->num_rx_ring[RAVB_BE] = ring->rx_pending; + priv->num_tx_ring[RAVB_BE] = ring->tx_pending; + priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; + priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; + + result = ravb_ring_init(ndev, RAVB_BE); + if (result < 0) { + netdev_err(ndev, "%s: ravb_ring_init(RAVB_BE) failed\n", + __func__); + return result; + } + + result = ravb_ring_init(ndev, RAVB_NC); + if (result < 0) { + netdev_err(ndev, "%s: ravb_ring_init(RAVB_NC) failed\n", + __func__); + return result; + } + + result = ravb_dmac_init(ndev, false); + if (result < 0) { + netdev_err(ndev, "%s: ravb_dmac_init() failed\n", __func__); + return result; + } + + ravb_mac_init(ndev, false); + + if (netif_running(ndev)) { + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | + CCC_OPC_OPERATION, CCC); + netif_wake_queue(ndev); + } + + return 0; +} + +static int ravb_get_ts_info(struct net_device *ndev, + struct ethtool_ts_info *info) +{ + struct ravb_private *priv = netdev_priv(ndev); + + info->so_timestamping = + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); + info->rx_filters = + (1 << HWTSTAMP_FILTER_NONE) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + (1 << HWTSTAMP_FILTER_ALL); + info->phc_index = ptp_clock_index(priv->ptp.clock); + + return 0; +} + +static const struct ethtool_ops ravb_ethtool_ops = { + .get_settings = ravb_get_settings, + .set_settings = ravb_set_settings, + .nway_reset = ravb_nway_reset, + .get_msglevel = ravb_get_msglevel, + .set_msglevel = ravb_set_msglevel, + .get_link = ethtool_op_get_link, + .get_strings = ravb_get_strings, + .get_ethtool_stats = ravb_get_ethtool_stats, + .get_sset_count = ravb_get_sset_count, + .get_ringparam = ravb_get_ringparam, + .set_ringparam = ravb_set_ringparam, + .get_ts_info = ravb_get_ts_info, +}; + +/* Network device open function for Ethernet AVB */ +static int ravb_open(struct net_device *ndev) +{ + int result; + struct ravb_private *priv = netdev_priv(ndev); + + napi_enable(&priv->napi); + + result = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED, ndev->name, + ndev); + if (result) { + netdev_err(ndev, "cannot request IRQ\n"); + goto out_napi_off; + } + + /* Descriptor set */ + /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the + * card needs room to do 8 byte alignment, +2 so we can reserve + * the first 2 bytes, and +16 gets room for the status word from the + * card. + */ + priv->rx_buffer_size = (ndev->mtu <= 1492 ? PKT_BUF_SZ : + (((ndev->mtu + 26 + 7) & ~7) + 2 + 16)); + + result = ravb_ring_init(ndev, RAVB_BE); + if (result) + goto out_free_irq; + result = ravb_ring_init(ndev, RAVB_NC); + if (result) + goto out_free_irq; + + /* Device init */ + result = ravb_dmac_init(ndev, true); + if (result) + goto out_free_irq; + ravb_mac_init(ndev, true); + + /* PHY control start */ + result = ravb_phy_start(ndev); + if (result) + goto out_free_irq; + + return 0; + +out_free_irq: + free_irq(ndev->irq, ndev); +out_napi_off: + napi_disable(&priv->napi); + return result; +} + +/* Timeout function for Ethernet AVB */ +static void ravb_tx_timeout(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int i, q; + + netif_stop_queue(ndev); + + netif_err(priv, tx_err, ndev, + "transmit timed out, status %8.8x, resetting...\n", + ravb_read(ndev, ISS)); + + /* tx_errors count up */ + ndev->stats.tx_errors++; + + /* Free all the skbuffs */ + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { + for (i = 0; i < priv->num_rx_ring[q]; i++) { + dev_kfree_skb(priv->rx_skb[q][i]); + priv->rx_skb[q][i] = NULL; + } + } + for (q = RAVB_BE; q < NUM_TX_QUEUE; q++) { + for (i = 0; i < priv->num_tx_ring[q]; i++) { + dev_kfree_skb(priv->tx_skb[q][i]); + priv->tx_skb[q][i] = NULL; + kfree(priv->tx_buffers[q][i]); + priv->tx_buffers[q][i] = NULL; + } + } + + /* Device init */ + ravb_dmac_init(ndev, true); + ravb_mac_init(ndev, true); +} + +/* Packet transmit function for Ethernet AVB */ +static int ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb = NULL; + struct ravb_tx_desc *desc; + unsigned long flags; + void *buffer; + u32 entry; + u32 tccr; + int q; + + /* If skb needs TX timestamp, it is handled in network control queue */ + q = (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC : RAVB_BE; + + spin_lock_irqsave(&priv->lock, flags); + if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] - 4) { + if (!ravb_tx_free(ndev, q)) { + netif_warn(priv, tx_queued, ndev, "TX FD exhausted.\n"); + netif_stop_queue(ndev); + spin_unlock_irqrestore(&priv->lock, flags); + return NETDEV_TX_BUSY; + } + } + entry = priv->cur_tx[q] % priv->num_tx_ring[q]; + priv->cur_tx[q]++; + spin_unlock_irqrestore(&priv->lock, flags); + + if (skb_put_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + + priv->tx_skb[q][entry] = skb; + buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN); + memcpy(buffer, skb->data, skb->len); + desc = &priv->tx_ring[q][entry]; + desc->ds = skb->len; + desc->dptr = dma_map_single(&ndev->dev, buffer, skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(&ndev->dev, desc->dptr)) { + dev_kfree_skb_any(skb); + priv->tx_skb[q][entry] = NULL; + return NETDEV_TX_OK; + } + + /* TX timestamp required */ + if (q == RAVB_NC) { + ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC); + if (!ts_skb) { + netdev_err(ndev, + "Cannot allocate skb list element for HW timestamp\n"); + return -ENOMEM; + } + ts_skb->skb = skb; + ts_skb->tag = priv->ts_skb_tag++; + priv->ts_skb_tag %= 0x400; + list_add_tail(&ts_skb->list, &priv->ts_skb_list); + + /* TAG and timestamp required flag */ + skb_tx_timestamp(skb); + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + desc->tsr = 1; + desc->tag = ts_skb->tag; + } + + /* Descriptor type */ + desc->dt = DT_FSINGLE; + + spin_lock_irqsave(&priv->lock, flags); + tccr = ravb_read(ndev, TCCR); + if (!(tccr & (TCCR_TSRQ0 << q))) + ravb_write(ndev, tccr | (TCCR_TSRQ0 << q), TCCR); + spin_unlock_irqrestore(&priv->lock, flags); + + return NETDEV_TX_OK; +} + +static struct net_device_stats *ravb_get_stats(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct net_device_stats *nstats, *stats0, *stats1; + + nstats = &ndev->stats; + stats0 = &priv->stats[RAVB_BE]; + stats1 = &priv->stats[RAVB_NC]; + + nstats->tx_dropped += ravb_read(ndev, TROCR); + ravb_write(ndev, 0, TROCR); /* (write clear) */ + nstats->collisions += ravb_read(ndev, CDCR); + ravb_write(ndev, 0, CDCR); /* (write clear) */ + nstats->tx_carrier_errors += ravb_read(ndev, LCCR); + ravb_write(ndev, 0, LCCR); /* (write clear) */ + + nstats->tx_carrier_errors += ravb_read(ndev, CERCR); + ravb_write(ndev, 0, CERCR); /* (write clear) */ + nstats->tx_carrier_errors += ravb_read(ndev, CEECR); + ravb_write(ndev, 0, CEECR); /* (write clear) */ + + nstats->rx_packets = stats0->rx_packets + stats1->rx_packets; + nstats->tx_packets = stats0->tx_packets + stats1->tx_packets; + nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes; + nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes; + nstats->multicast = stats0->multicast + stats1->multicast; + nstats->rx_errors = stats0->rx_errors + stats1->rx_errors; + nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors; + nstats->rx_frame_errors = + stats0->rx_frame_errors + stats1->rx_frame_errors; + nstats->rx_length_errors = + stats0->rx_length_errors + stats1->rx_length_errors; + nstats->rx_missed_errors = + stats0->rx_missed_errors + stats1->rx_missed_errors; + nstats->rx_over_errors = + stats0->rx_over_errors + stats1->rx_over_errors; + + return nstats; +} + +/* device close function for Ethernet AVB */ +static int ravb_close(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb, *ts_skb1; + + netif_stop_queue(ndev); + + /* Disable interrupts by clearing the interrupt masks. */ + ravb_write(ndev, 0, RIC0); + ravb_write(ndev, 0, RIC1); + ravb_write(ndev, 0, RIC2); + ravb_write(ndev, 0, TIC); + + /* Wait for DMA stop */ + ravb_wait_stop_dma(ndev); + + /* Set the config mode to stop the AVB-DMAC's processes */ + if (ravb_reset(ndev) < 0) + netdev_err(ndev, + "Device will be stopped after HW processes are done.\n"); + + /* Clear the timestamp list */ + list_for_each_entry_safe(ts_skb, ts_skb1, &priv->ts_skb_list, list) { + list_del(&ts_skb->list); + kfree(ts_skb); + } + + /* PHY disconnect */ + if (priv->phydev) { + phy_stop(priv->phydev); + phy_disconnect(priv->phydev); + priv->phydev = NULL; + } + + free_irq(ndev->irq, ndev); + + napi_disable(&priv->napi); + + /* Free all the skbs in the RX queue. */ + ravb_ring_free(ndev, RAVB_BE); + ravb_ring_free(ndev, RAVB_NC); + + /* Free DMA buffer */ + ravb_free_dma_buffer(priv); + + return 0; +} + +/* Control hardware time stamping */ +static int ravb_hwtstamp_ioctl(struct net_device *ndev, struct ifreq *ifr, + int cmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct hwtstamp_config config; + u32 tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED; + u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED; + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + /* Reserved for future extensions */ + if (config.flags) + return -EINVAL; + + switch (config.tx_type) { + case HWTSTAMP_TX_OFF: + tstamp_tx_ctrl = 0; + case HWTSTAMP_TX_ON: + break; + default: + return -ERANGE; + } + + switch (config.rx_filter) { + case HWTSTAMP_FILTER_NONE: + tstamp_rx_ctrl = 0; + break; + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; + break; + default: + config.rx_filter = HWTSTAMP_FILTER_ALL; + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL; + } + + priv->tstamp_tx_ctrl = tstamp_tx_ctrl; + priv->tstamp_rx_ctrl = tstamp_rx_ctrl; + + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + +/* ioctl to device function */ +static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev = priv->phydev; + + if (!netif_running(ndev)) + return -EINVAL; + + if (!phydev) + return -ENODEV; + + if (cmd == SIOCSHWTSTAMP) + return ravb_hwtstamp_ioctl(ndev, req, cmd); + + return phy_mii_ioctl(phydev, req, cmd); +} + +static const struct net_device_ops ravb_netdev_ops = { + .ndo_open = ravb_open, + .ndo_stop = ravb_close, + .ndo_start_xmit = ravb_start_xmit, + .ndo_get_stats = ravb_get_stats, + .ndo_tx_timeout = ravb_tx_timeout, + .ndo_do_ioctl = ravb_do_ioctl, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_change_mtu = eth_change_mtu, +}; + +static void ravb_ptp_tcr_request(struct ravb_private *priv, int request) +{ + struct net_device *ndev = priv->ndev; + + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) { + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) + ; + ravb_write(ndev, ravb_read(ndev, GCCR) | request, GCCR); + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) + ; + } +} + +static bool ravb_ptp_is_config(struct ravb_private *priv) +{ + if (ravb_read(priv->ndev, CSR) & CSR_OPS_CONFIG) + return true; + else + return false; +} + +/* Caller must hold lock */ +static void ravb_ptp_time_read(struct ravb_private *priv, struct timespec *ts) +{ + struct net_device *ndev = priv->ndev; + + ravb_ptp_tcr_request(priv, GCCR_TCR_CAPTURE); + + ts->tv_nsec = ravb_read(ndev, GCT0); + ts->tv_sec = ravb_read(ndev, GCT1); +} + +/* Caller must hold lock */ +static void ravb_ptp_time_write(struct ravb_private *priv, + const struct timespec *ts) +{ + struct net_device *ndev = priv->ndev; + + ravb_ptp_tcr_request(priv, GCCR_TCR_RESET); + + ravb_write(ndev, ts->tv_nsec, GTO0); + ravb_write(ndev, ts->tv_sec, GTO1); + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTO, GCCR); + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) + while (ravb_read(ndev, GCCR) & GCCR_LTO) + ; +} + +/* Caller must hold lock */ +static u64 ravb_ptp_cnt_read(struct ravb_private *priv) +{ + struct timespec ts; + ktime_t kt; + + ravb_ptp_time_read(priv, &ts); + kt = timespec_to_ktime(ts); + + return ktime_to_ns(kt); +} + +/* Caller must hold lock */ +static void ravb_ptp_cnt_write(struct ravb_private *priv, u64 ns) +{ + struct timespec ts; + + ts = ns_to_timespec(ns); + + ravb_ptp_time_write(priv, &ts); +} + +/* Caller must hold lock */ +static void ravb_ptp_select_counter(struct ravb_private *priv, u16 sel) +{ + struct net_device *ndev = priv->ndev; + u32 val; + + while ((ravb_read(ndev, GCCR) & GCCR_TCR) != GCCR_TCR_NOREQ) + ; + val = ravb_read(ndev, GCCR) & ~GCCR_TCSS; + ravb_write(ndev, val | (sel << 8), GCCR); +} + +/* Caller must hold lock */ +static void ravb_ptp_update_addend(struct ravb_private *priv, u32 addend) +{ + struct net_device *ndev = priv->ndev; + + priv->ptp.current_addend = addend; + + ravb_write(ndev, addend & GTI_TIV, GTI); + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); + if (ravb_read(ndev, CSR) & CSR_OPS_OPERATION) + while (ravb_read(ndev, GCCR) & GCCR_LTI) + ; +} + +/* PTP clock operations */ +static int ravb_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + u32 diff, addend; + int neg_adj = 0; + u64 adj; + + if (ppb < 0) { + neg_adj = 1; + ppb = -ppb; + } + addend = priv->ptp.default_addend; + adj = addend; + adj *= ppb; + diff = div_u64(adj, NSEC_PER_SEC); + + addend = neg_adj ? addend - diff : addend + diff; + + spin_lock_irqsave(&priv->lock, flags); + ravb_ptp_update_addend(priv, addend); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + u64 now; + + if (ravb_ptp_is_config(priv)) + return -EBUSY; + + spin_lock_irqsave(&priv->lock, flags); + now = ravb_ptp_cnt_read(priv); + now += delta; + ravb_ptp_cnt_write(priv, now); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + + if (ravb_ptp_is_config(priv)) + return -EBUSY; + + spin_lock_irqsave(&priv->lock, flags); + ravb_ptp_time_read(priv, ts); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_settime(struct ptp_clock_info *ptp, + const struct timespec *ts) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + ravb_ptp_time_write(priv, ts); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_extts(struct ptp_clock_info *ptp, + struct ptp_extts_request *req, int on) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct net_device *ndev = priv->ndev; + unsigned long flags; + u32 gic; + + if (req->index) + return -EINVAL; + + if (priv->ptp.extts[req->index] == on) + return 0; + priv->ptp.extts[req->index] = on; + + spin_lock_irqsave(&priv->lock, flags); + gic = ravb_read(ndev, GIC); + if (on) + gic |= GIC_PTCE; + else + gic &= ~GIC_PTCE; + ravb_write(ndev, gic, GIC); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_perout(struct ptp_clock_info *ptp, + struct ptp_perout_request *req, int on) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct net_device *ndev = priv->ndev; + struct ravb_ptp_perout *perout; + unsigned long flags; + u32 gic; + + if (req->index) + return -EINVAL; + + if (on) { + u64 start_ns; + u64 period_ns; + + start_ns = req->start.sec * NSEC_PER_SEC + req->start.nsec; + period_ns = req->period.sec * NSEC_PER_SEC + req->period.nsec; + + if (start_ns > U32_MAX) { + netdev_warn(ndev, + "ptp: Start value (nsec) is over limit. Maximum size of start is only 32 bits\n"); + return -ERANGE; + } + + if (period_ns > U32_MAX) { + netdev_warn(ndev, + "ptp: Period value (nsec) is over limit. Maximum size of period is only 32 bits\n"); + return -ERANGE; + } + + spin_lock_irqsave(&priv->lock, flags); + + perout = &priv->ptp.perout[req->index]; + perout->target = (u32)start_ns; + perout->period = (u32)period_ns; + ravb_ptp_update_compare(priv, (u32)start_ns); + + /* Unmask interrupt */ + gic = ravb_read(ndev, GIC); + gic |= GIC_PTME; + ravb_write(ndev, gic, GIC); + + spin_unlock_irqrestore(&priv->lock, flags); + } else { + spin_lock_irqsave(&priv->lock, flags); + + perout = &priv->ptp.perout[req->index]; + perout->period = 0; + + /* Mask interrupt */ + gic = ravb_read(ndev, GIC); + gic &= ~GIC_PTME; + ravb_write(ndev, gic, GIC); + + spin_unlock_irqrestore(&priv->lock, flags); + } + + return 0; +} + +static int ravb_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *req, int on) +{ + switch (req->type) { + case PTP_CLK_REQ_EXTTS: + return ravb_ptp_extts(ptp, &req->extts, on); + case PTP_CLK_REQ_PEROUT: + return ravb_ptp_perout(ptp, &req->perout, on); + default: + return -EOPNOTSUPP; + } +} + +static const struct ptp_clock_info ravb_ptp_info = { + .owner = THIS_MODULE, + .name = "ravb clock", + .max_adj = 50000000, + .n_ext_ts = N_EXT_TS, + .n_per_out = N_PER_OUT, + .adjfreq = ravb_ptp_adjfreq, + .adjtime = ravb_ptp_adjtime, + .gettime = ravb_ptp_gettime, + .settime = ravb_ptp_settime, + .enable = ravb_ptp_enable, +}; + +static int ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + + priv->ptp.info = ravb_ptp_info; + + priv->ptp.default_addend = ravb_read(ndev, GTI); + priv->ptp.current_addend = priv->ptp.default_addend; + + spin_lock_irqsave(&priv->lock, flags); + ravb_ptp_select_counter(priv, GCCR_TCSS_ADJGPTP); + spin_unlock_irqrestore(&priv->lock, flags); + + priv->ptp.clock = ptp_clock_register(&priv->ptp.info, &pdev->dev); + if (IS_ERR(priv->ptp.clock)) + return PTR_ERR(priv->ptp.clock); + + return 0; +} + +static void ravb_ptp_stop(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + ravb_write(ndev, 0, GIC); + ravb_write(ndev, 0, GIS); + + ptp_clock_unregister(priv->ptp.clock); +} + +/* MDIO bus init function */ +static int ravb_mdio_init(struct ravb_private *priv) +{ + struct platform_device *pdev = priv->pdev; + struct device *dev = &pdev->dev; + int result; + + /* Bitbang init */ + priv->mdiobb.ops = &bb_ops; + + /* MII controller setting */ + priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb); + if (!priv->mii_bus) + return -ENOMEM; + + /* Hook up MII support for ethtool */ + priv->mii_bus->name = "ravb_mii"; + priv->mii_bus->parent = dev; + snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", + pdev->name, pdev->id); + + /* Register MDIO bus */ + result = of_mdiobus_register(priv->mii_bus, dev->of_node); + if (result) + goto out_free_bus; + + return 0; + +out_free_bus: + free_mdio_bitbang(priv->mii_bus); + return result; +} + +/* MDIO bus release function */ +static int ravb_mdio_release(struct ravb_private *priv) +{ + /* Unregister mdio bus */ + mdiobus_unregister(priv->mii_bus); + + /* Free bitbang info */ + free_mdio_bitbang(priv->mii_bus); + + return 0; +} + +static int ravb_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct ravb_private *priv; + struct net_device *ndev; + int result, q; + struct resource *res; + + if (!np) { + dev_err(&pdev->dev, + "this driver is required to be instantiated from device tree\n"); + return -EINVAL; + } + + /* Get base address */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "invalid resource\n"); + return -EINVAL; + } + + ndev = alloc_etherdev(sizeof(struct ravb_private)); + if (!ndev) + return -ENOMEM; + + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + /* The Ether-specific entries in the device structure. */ + ndev->base_addr = res->start; + ndev->dma = -1; + result = platform_get_irq(pdev, 0); + if (result < 0) { + result = -ENODEV; + goto out_release; + } + ndev->irq = result; + + SET_NETDEV_DEV(ndev, &pdev->dev); + + priv = netdev_priv(ndev); + priv->ndev = ndev; + priv->pdev = pdev; + priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE; + priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE; + priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; + priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; + priv->addr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->addr)) { + result = PTR_ERR(priv->addr); + goto out_release; + } + + spin_lock_init(&priv->lock); + + priv->phy_interface = of_get_phy_mode(np); + + priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link"); + priv->avb_link_active_low = + of_property_read_bool(np, "renesas,ether-link-active-low"); + + ndev->netdev_ops = &ravb_netdev_ops; + + priv->rx_over_errors = 0; + priv->rx_fifo_errors = 0; + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { + struct net_device_stats *stats = &priv->stats[q]; + + stats->rx_packets = 0; + stats->tx_packets = 0; + stats->rx_bytes = 0; + stats->tx_bytes = 0; + stats->multicast = 0; + stats->rx_errors = 0; + stats->rx_crc_errors = 0; + stats->rx_frame_errors = 0; + stats->rx_length_errors = 0; + stats->rx_missed_errors = 0; + stats->rx_over_errors = 0; + } + + /* Set function */ + ndev->netdev_ops = &ravb_netdev_ops; + ndev->ethtool_ops = &ravb_ethtool_ops; + + /* Set AVB config mode */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, + CCC); + + /* Set CSEL value */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) | CCC_CSEL_HPB, + CCC); + + /* Set GTI value */ + ravb_write(ndev, ((1000 << 20) / 130) & GTI_TIV, GTI); + + /* Request GTI loading */ + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); + + /* Allocate descriptor base address table */ + priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM; + priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size, + &priv->desc_bat_dma, GFP_KERNEL); + if (!priv->desc_bat) { + dev_err(&ndev->dev, + "Cannot allocate desc base address table (size %d bytes)\n", + priv->desc_bat_size); + result = -ENOMEM; + goto out_release; + } + for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++) + priv->desc_bat[q].dt = DT_EOS; + ravb_write(ndev, priv->desc_bat_dma, DBAT); + + /* Initialise HW timestamp list */ + INIT_LIST_HEAD(&priv->ts_skb_list); + + /* Initialise PTP Clock driver */ + ravb_ptp_init(ndev, pdev); + + /* Debug message level */ + priv->msg_enable = RAVB_DEF_MSG_ENABLE; + + /* Read and set MAC address */ + read_mac_address(ndev, of_get_mac_address(np)); + if (!is_valid_ether_addr(ndev->dev_addr)) { + dev_warn(&pdev->dev, + "no valid MAC address supplied, using a random one\n"); + eth_hw_addr_random(ndev); + } + + /* MDIO bus init */ + result = ravb_mdio_init(priv); + if (result) { + dev_err(&ndev->dev, "failed to initialize MDIO\n"); + goto out_dma_free; + } + + netif_napi_add(ndev, &priv->napi, ravb_poll, 64); + + /* Network device register */ + result = register_netdev(ndev); + if (result) + goto out_napi_del; + + /* Print device information */ + netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n", + (u32)ndev->base_addr, ndev->dev_addr, ndev->irq); + + platform_set_drvdata(pdev, ndev); + + return 0; + +out_napi_del: + netif_napi_del(&priv->napi); + ravb_mdio_release(priv); +out_dma_free: + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, + priv->desc_bat_dma); + /* Stop PTP Clock driver */ + ravb_ptp_stop(ndev); +out_release: + if (ndev) + free_netdev(ndev); + + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return result; +} + +static int ravb_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ravb_private *priv = netdev_priv(ndev); + + /* Stop PTP clock driver */ + ravb_ptp_stop(ndev); + + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, + priv->desc_bat_dma); + /* Set reset mode */ + ravb_write(ndev, CCC_OPC_RESET, CCC); + pm_runtime_put_sync(&pdev->dev); + unregister_netdev(ndev); + netif_napi_del(&priv->napi); + ravb_mdio_release(priv); + pm_runtime_disable(&pdev->dev); + free_netdev(ndev); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int ravb_runtime_nop(struct device *dev) +{ + /* Runtime PM callback shared between ->runtime_suspend() + * and ->runtime_resume(). Simply returns success. + * + * This driver re-initializes all registers after + * pm_runtime_get_sync() anyway so there is no need + * to save and restore registers here. + */ + return 0; +} + +static const struct dev_pm_ops ravb_dev_pm_ops = { + .runtime_suspend = ravb_runtime_nop, + .runtime_resume = ravb_runtime_nop, +}; + +#define RAVB_PM_OPS (&ravb_dev_pm_ops) +#else +#define RAVB_PM_OPS NULL +#endif + +static const struct of_device_id ravb_match_table[] = { + { .compatible = "renesas,ravb-r8a7790" }, + { .compatible = "renesas,ravb-r8a7794" }, + { } +}; +MODULE_DEVICE_TABLE(of, ravb_match_table); + +static struct platform_driver ravb_driver = { + .probe = ravb_probe, + .remove = ravb_remove, + .driver = { + .name = "ravb", + .pm = RAVB_PM_OPS, + .of_match_table = ravb_match_table, + }, +}; + +module_platform_driver(ravb_driver); + +MODULE_AUTHOR("Mitsuhiro Kimura"); +MODULE_DESCRIPTION("Renesas Ethernet AVB driver"); +MODULE_LICENSE("GPL v2");

[resend] Renesas Ethernet AVB driver

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