v4.19.13 snapshot.
diff --git a/drivers/net/ethernet/cadence/Kconfig b/drivers/net/ethernet/cadence/Kconfig
new file mode 100644
index 0000000..b998401
--- /dev/null
+++ b/drivers/net/ethernet/cadence/Kconfig
@@ -0,0 +1,51 @@
+#
+# Atmel device configuration
+#
+
+config NET_VENDOR_CADENCE
+ bool "Cadence devices"
+ depends on HAS_IOMEM
+ default y
+ ---help---
+ If you have a network (Ethernet) card belonging to this class, say Y.
+
+ If unsure, say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the remaining Atmel network card questions. If you say Y, you will be
+ asked for your specific card in the following questions.
+
+if NET_VENDOR_CADENCE
+
+config MACB
+ tristate "Cadence MACB/GEM support"
+ depends on HAS_DMA
+ select PHYLIB
+ ---help---
+ The Cadence MACB ethernet interface is found on many Atmel AT32 and
+ AT91 parts. This driver also supports the Cadence GEM (Gigabit
+ Ethernet MAC found in some ARM SoC devices). Say Y to include
+ support for the MACB/GEM chip.
+
+ To compile this driver as a module, choose M here: the module
+ will be macb.
+
+config MACB_USE_HWSTAMP
+ bool "Use IEEE 1588 hwstamp"
+ depends on MACB
+ default y
+ imply PTP_1588_CLOCK
+ ---help---
+ Enable IEEE 1588 Precision Time Protocol (PTP) support for MACB.
+
+config MACB_PCI
+ tristate "Cadence PCI MACB/GEM support"
+ depends on MACB && PCI && COMMON_CLK
+ ---help---
+ This is PCI wrapper for MACB driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called macb_pci.
+
+endif # NET_VENDOR_CADENCE
diff --git a/drivers/net/ethernet/cadence/Makefile b/drivers/net/ethernet/cadence/Makefile
new file mode 100644
index 0000000..1f33cdc
--- /dev/null
+++ b/drivers/net/ethernet/cadence/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Atmel network device drivers.
+#
+macb-y := macb_main.o
+
+ifeq ($(CONFIG_MACB_USE_HWSTAMP),y)
+macb-y += macb_ptp.o
+endif
+
+obj-$(CONFIG_MACB) += macb.o
+obj-$(CONFIG_MACB_PCI) += macb_pci.o
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
new file mode 100644
index 0000000..3d45f4c
--- /dev/null
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -0,0 +1,1274 @@
+/*
+ * Atmel MACB Ethernet Controller driver
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _MACB_H
+#define _MACB_H
+
+#include <linux/phy.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/net_tstamp.h>
+#include <linux/interrupt.h>
+
+#if defined(CONFIG_ARCH_DMA_ADDR_T_64BIT) || defined(CONFIG_MACB_USE_HWSTAMP)
+#define MACB_EXT_DESC
+#endif
+
+#define MACB_GREGS_NBR 16
+#define MACB_GREGS_VERSION 2
+#define MACB_MAX_QUEUES 8
+
+/* MACB register offsets */
+#define MACB_NCR 0x0000 /* Network Control */
+#define MACB_NCFGR 0x0004 /* Network Config */
+#define MACB_NSR 0x0008 /* Network Status */
+#define MACB_TAR 0x000c /* AT91RM9200 only */
+#define MACB_TCR 0x0010 /* AT91RM9200 only */
+#define MACB_TSR 0x0014 /* Transmit Status */
+#define MACB_RBQP 0x0018 /* RX Q Base Address */
+#define MACB_TBQP 0x001c /* TX Q Base Address */
+#define MACB_RSR 0x0020 /* Receive Status */
+#define MACB_ISR 0x0024 /* Interrupt Status */
+#define MACB_IER 0x0028 /* Interrupt Enable */
+#define MACB_IDR 0x002c /* Interrupt Disable */
+#define MACB_IMR 0x0030 /* Interrupt Mask */
+#define MACB_MAN 0x0034 /* PHY Maintenance */
+#define MACB_PTR 0x0038
+#define MACB_PFR 0x003c
+#define MACB_FTO 0x0040
+#define MACB_SCF 0x0044
+#define MACB_MCF 0x0048
+#define MACB_FRO 0x004c
+#define MACB_FCSE 0x0050
+#define MACB_ALE 0x0054
+#define MACB_DTF 0x0058
+#define MACB_LCOL 0x005c
+#define MACB_EXCOL 0x0060
+#define MACB_TUND 0x0064
+#define MACB_CSE 0x0068
+#define MACB_RRE 0x006c
+#define MACB_ROVR 0x0070
+#define MACB_RSE 0x0074
+#define MACB_ELE 0x0078
+#define MACB_RJA 0x007c
+#define MACB_USF 0x0080
+#define MACB_STE 0x0084
+#define MACB_RLE 0x0088
+#define MACB_TPF 0x008c
+#define MACB_HRB 0x0090
+#define MACB_HRT 0x0094
+#define MACB_SA1B 0x0098
+#define MACB_SA1T 0x009c
+#define MACB_SA2B 0x00a0
+#define MACB_SA2T 0x00a4
+#define MACB_SA3B 0x00a8
+#define MACB_SA3T 0x00ac
+#define MACB_SA4B 0x00b0
+#define MACB_SA4T 0x00b4
+#define MACB_TID 0x00b8
+#define MACB_TPQ 0x00bc
+#define MACB_USRIO 0x00c0
+#define MACB_WOL 0x00c4
+#define MACB_MID 0x00fc
+#define MACB_TBQPH 0x04C8
+#define MACB_RBQPH 0x04D4
+
+/* GEM register offsets. */
+#define GEM_NCFGR 0x0004 /* Network Config */
+#define GEM_USRIO 0x000c /* User IO */
+#define GEM_DMACFG 0x0010 /* DMA Configuration */
+#define GEM_JML 0x0048 /* Jumbo Max Length */
+#define GEM_HRB 0x0080 /* Hash Bottom */
+#define GEM_HRT 0x0084 /* Hash Top */
+#define GEM_SA1B 0x0088 /* Specific1 Bottom */
+#define GEM_SA1T 0x008C /* Specific1 Top */
+#define GEM_SA2B 0x0090 /* Specific2 Bottom */
+#define GEM_SA2T 0x0094 /* Specific2 Top */
+#define GEM_SA3B 0x0098 /* Specific3 Bottom */
+#define GEM_SA3T 0x009C /* Specific3 Top */
+#define GEM_SA4B 0x00A0 /* Specific4 Bottom */
+#define GEM_SA4T 0x00A4 /* Specific4 Top */
+#define GEM_EFTSH 0x00e8 /* PTP Event Frame Transmitted Seconds Register 47:32 */
+#define GEM_EFRSH 0x00ec /* PTP Event Frame Received Seconds Register 47:32 */
+#define GEM_PEFTSH 0x00f0 /* PTP Peer Event Frame Transmitted Seconds Register 47:32 */
+#define GEM_PEFRSH 0x00f4 /* PTP Peer Event Frame Received Seconds Register 47:32 */
+#define GEM_OTX 0x0100 /* Octets transmitted */
+#define GEM_OCTTXL 0x0100 /* Octets transmitted [31:0] */
+#define GEM_OCTTXH 0x0104 /* Octets transmitted [47:32] */
+#define GEM_TXCNT 0x0108 /* Frames Transmitted counter */
+#define GEM_TXBCCNT 0x010c /* Broadcast Frames counter */
+#define GEM_TXMCCNT 0x0110 /* Multicast Frames counter */
+#define GEM_TXPAUSECNT 0x0114 /* Pause Frames Transmitted Counter */
+#define GEM_TX64CNT 0x0118 /* 64 byte Frames TX counter */
+#define GEM_TX65CNT 0x011c /* 65-127 byte Frames TX counter */
+#define GEM_TX128CNT 0x0120 /* 128-255 byte Frames TX counter */
+#define GEM_TX256CNT 0x0124 /* 256-511 byte Frames TX counter */
+#define GEM_TX512CNT 0x0128 /* 512-1023 byte Frames TX counter */
+#define GEM_TX1024CNT 0x012c /* 1024-1518 byte Frames TX counter */
+#define GEM_TX1519CNT 0x0130 /* 1519+ byte Frames TX counter */
+#define GEM_TXURUNCNT 0x0134 /* TX under run error counter */
+#define GEM_SNGLCOLLCNT 0x0138 /* Single Collision Frame Counter */
+#define GEM_MULTICOLLCNT 0x013c /* Multiple Collision Frame Counter */
+#define GEM_EXCESSCOLLCNT 0x0140 /* Excessive Collision Frame Counter */
+#define GEM_LATECOLLCNT 0x0144 /* Late Collision Frame Counter */
+#define GEM_TXDEFERCNT 0x0148 /* Deferred Transmission Frame Counter */
+#define GEM_TXCSENSECNT 0x014c /* Carrier Sense Error Counter */
+#define GEM_ORX 0x0150 /* Octets received */
+#define GEM_OCTRXL 0x0150 /* Octets received [31:0] */
+#define GEM_OCTRXH 0x0154 /* Octets received [47:32] */
+#define GEM_RXCNT 0x0158 /* Frames Received Counter */
+#define GEM_RXBROADCNT 0x015c /* Broadcast Frames Received Counter */
+#define GEM_RXMULTICNT 0x0160 /* Multicast Frames Received Counter */
+#define GEM_RXPAUSECNT 0x0164 /* Pause Frames Received Counter */
+#define GEM_RX64CNT 0x0168 /* 64 byte Frames RX Counter */
+#define GEM_RX65CNT 0x016c /* 65-127 byte Frames RX Counter */
+#define GEM_RX128CNT 0x0170 /* 128-255 byte Frames RX Counter */
+#define GEM_RX256CNT 0x0174 /* 256-511 byte Frames RX Counter */
+#define GEM_RX512CNT 0x0178 /* 512-1023 byte Frames RX Counter */
+#define GEM_RX1024CNT 0x017c /* 1024-1518 byte Frames RX Counter */
+#define GEM_RX1519CNT 0x0180 /* 1519+ byte Frames RX Counter */
+#define GEM_RXUNDRCNT 0x0184 /* Undersize Frames Received Counter */
+#define GEM_RXOVRCNT 0x0188 /* Oversize Frames Received Counter */
+#define GEM_RXJABCNT 0x018c /* Jabbers Received Counter */
+#define GEM_RXFCSCNT 0x0190 /* Frame Check Sequence Error Counter */
+#define GEM_RXLENGTHCNT 0x0194 /* Length Field Error Counter */
+#define GEM_RXSYMBCNT 0x0198 /* Symbol Error Counter */
+#define GEM_RXALIGNCNT 0x019c /* Alignment Error Counter */
+#define GEM_RXRESERRCNT 0x01a0 /* Receive Resource Error Counter */
+#define GEM_RXORCNT 0x01a4 /* Receive Overrun Counter */
+#define GEM_RXIPCCNT 0x01a8 /* IP header Checksum Error Counter */
+#define GEM_RXTCPCCNT 0x01ac /* TCP Checksum Error Counter */
+#define GEM_RXUDPCCNT 0x01b0 /* UDP Checksum Error Counter */
+#define GEM_TISUBN 0x01bc /* 1588 Timer Increment Sub-ns */
+#define GEM_TSH 0x01c0 /* 1588 Timer Seconds High */
+#define GEM_TSL 0x01d0 /* 1588 Timer Seconds Low */
+#define GEM_TN 0x01d4 /* 1588 Timer Nanoseconds */
+#define GEM_TA 0x01d8 /* 1588 Timer Adjust */
+#define GEM_TI 0x01dc /* 1588 Timer Increment */
+#define GEM_EFTSL 0x01e0 /* PTP Event Frame Tx Seconds Low */
+#define GEM_EFTN 0x01e4 /* PTP Event Frame Tx Nanoseconds */
+#define GEM_EFRSL 0x01e8 /* PTP Event Frame Rx Seconds Low */
+#define GEM_EFRN 0x01ec /* PTP Event Frame Rx Nanoseconds */
+#define GEM_PEFTSL 0x01f0 /* PTP Peer Event Frame Tx Secs Low */
+#define GEM_PEFTN 0x01f4 /* PTP Peer Event Frame Tx Ns */
+#define GEM_PEFRSL 0x01f8 /* PTP Peer Event Frame Rx Sec Low */
+#define GEM_PEFRN 0x01fc /* PTP Peer Event Frame Rx Ns */
+#define GEM_DCFG1 0x0280 /* Design Config 1 */
+#define GEM_DCFG2 0x0284 /* Design Config 2 */
+#define GEM_DCFG3 0x0288 /* Design Config 3 */
+#define GEM_DCFG4 0x028c /* Design Config 4 */
+#define GEM_DCFG5 0x0290 /* Design Config 5 */
+#define GEM_DCFG6 0x0294 /* Design Config 6 */
+#define GEM_DCFG7 0x0298 /* Design Config 7 */
+#define GEM_DCFG8 0x029C /* Design Config 8 */
+#define GEM_DCFG10 0x02A4 /* Design Config 10 */
+
+#define GEM_TXBDCTRL 0x04cc /* TX Buffer Descriptor control register */
+#define GEM_RXBDCTRL 0x04d0 /* RX Buffer Descriptor control register */
+
+/* Screener Type 2 match registers */
+#define GEM_SCRT2 0x540
+
+/* EtherType registers */
+#define GEM_ETHT 0x06E0
+
+/* Type 2 compare registers */
+#define GEM_T2CMPW0 0x0700
+#define GEM_T2CMPW1 0x0704
+#define T2CMP_OFST(t2idx) (t2idx * 2)
+
+/* type 2 compare registers
+ * each location requires 3 compare regs
+ */
+#define GEM_IP4SRC_CMP(idx) (idx * 3)
+#define GEM_IP4DST_CMP(idx) (idx * 3 + 1)
+#define GEM_PORT_CMP(idx) (idx * 3 + 2)
+
+/* Which screening type 2 EtherType register will be used (0 - 7) */
+#define SCRT2_ETHT 0
+
+#define GEM_ISR(hw_q) (0x0400 + ((hw_q) << 2))
+#define GEM_TBQP(hw_q) (0x0440 + ((hw_q) << 2))
+#define GEM_TBQPH(hw_q) (0x04C8)
+#define GEM_RBQP(hw_q) (0x0480 + ((hw_q) << 2))
+#define GEM_RBQS(hw_q) (0x04A0 + ((hw_q) << 2))
+#define GEM_RBQPH(hw_q) (0x04D4)
+#define GEM_IER(hw_q) (0x0600 + ((hw_q) << 2))
+#define GEM_IDR(hw_q) (0x0620 + ((hw_q) << 2))
+#define GEM_IMR(hw_q) (0x0640 + ((hw_q) << 2))
+
+/* Bitfields in NCR */
+#define MACB_LB_OFFSET 0 /* reserved */
+#define MACB_LB_SIZE 1
+#define MACB_LLB_OFFSET 1 /* Loop back local */
+#define MACB_LLB_SIZE 1
+#define MACB_RE_OFFSET 2 /* Receive enable */
+#define MACB_RE_SIZE 1
+#define MACB_TE_OFFSET 3 /* Transmit enable */
+#define MACB_TE_SIZE 1
+#define MACB_MPE_OFFSET 4 /* Management port enable */
+#define MACB_MPE_SIZE 1
+#define MACB_CLRSTAT_OFFSET 5 /* Clear stats regs */
+#define MACB_CLRSTAT_SIZE 1
+#define MACB_INCSTAT_OFFSET 6 /* Incremental stats regs */
+#define MACB_INCSTAT_SIZE 1
+#define MACB_WESTAT_OFFSET 7 /* Write enable stats regs */
+#define MACB_WESTAT_SIZE 1
+#define MACB_BP_OFFSET 8 /* Back pressure */
+#define MACB_BP_SIZE 1
+#define MACB_TSTART_OFFSET 9 /* Start transmission */
+#define MACB_TSTART_SIZE 1
+#define MACB_THALT_OFFSET 10 /* Transmit halt */
+#define MACB_THALT_SIZE 1
+#define MACB_NCR_TPF_OFFSET 11 /* Transmit pause frame */
+#define MACB_NCR_TPF_SIZE 1
+#define MACB_TZQ_OFFSET 12 /* Transmit zero quantum pause frame */
+#define MACB_TZQ_SIZE 1
+#define MACB_SRTSM_OFFSET 15
+#define MACB_OSSMODE_OFFSET 24 /* Enable One Step Synchro Mode */
+#define MACB_OSSMODE_SIZE 1
+
+/* Bitfields in NCFGR */
+#define MACB_SPD_OFFSET 0 /* Speed */
+#define MACB_SPD_SIZE 1
+#define MACB_FD_OFFSET 1 /* Full duplex */
+#define MACB_FD_SIZE 1
+#define MACB_BIT_RATE_OFFSET 2 /* Discard non-VLAN frames */
+#define MACB_BIT_RATE_SIZE 1
+#define MACB_JFRAME_OFFSET 3 /* reserved */
+#define MACB_JFRAME_SIZE 1
+#define MACB_CAF_OFFSET 4 /* Copy all frames */
+#define MACB_CAF_SIZE 1
+#define MACB_NBC_OFFSET 5 /* No broadcast */
+#define MACB_NBC_SIZE 1
+#define MACB_NCFGR_MTI_OFFSET 6 /* Multicast hash enable */
+#define MACB_NCFGR_MTI_SIZE 1
+#define MACB_UNI_OFFSET 7 /* Unicast hash enable */
+#define MACB_UNI_SIZE 1
+#define MACB_BIG_OFFSET 8 /* Receive 1536 byte frames */
+#define MACB_BIG_SIZE 1
+#define MACB_EAE_OFFSET 9 /* External address match enable */
+#define MACB_EAE_SIZE 1
+#define MACB_CLK_OFFSET 10
+#define MACB_CLK_SIZE 2
+#define MACB_RTY_OFFSET 12 /* Retry test */
+#define MACB_RTY_SIZE 1
+#define MACB_PAE_OFFSET 13 /* Pause enable */
+#define MACB_PAE_SIZE 1
+#define MACB_RM9200_RMII_OFFSET 13 /* AT91RM9200 only */
+#define MACB_RM9200_RMII_SIZE 1 /* AT91RM9200 only */
+#define MACB_RBOF_OFFSET 14 /* Receive buffer offset */
+#define MACB_RBOF_SIZE 2
+#define MACB_RLCE_OFFSET 16 /* Length field error frame discard */
+#define MACB_RLCE_SIZE 1
+#define MACB_DRFCS_OFFSET 17 /* FCS remove */
+#define MACB_DRFCS_SIZE 1
+#define MACB_EFRHD_OFFSET 18
+#define MACB_EFRHD_SIZE 1
+#define MACB_IRXFCS_OFFSET 19
+#define MACB_IRXFCS_SIZE 1
+
+/* GEM specific NCFGR bitfields. */
+#define GEM_GBE_OFFSET 10 /* Gigabit mode enable */
+#define GEM_GBE_SIZE 1
+#define GEM_PCSSEL_OFFSET 11
+#define GEM_PCSSEL_SIZE 1
+#define GEM_CLK_OFFSET 18 /* MDC clock division */
+#define GEM_CLK_SIZE 3
+#define GEM_DBW_OFFSET 21 /* Data bus width */
+#define GEM_DBW_SIZE 2
+#define GEM_RXCOEN_OFFSET 24
+#define GEM_RXCOEN_SIZE 1
+#define GEM_SGMIIEN_OFFSET 27
+#define GEM_SGMIIEN_SIZE 1
+
+
+/* Constants for data bus width. */
+#define GEM_DBW32 0 /* 32 bit AMBA AHB data bus width */
+#define GEM_DBW64 1 /* 64 bit AMBA AHB data bus width */
+#define GEM_DBW128 2 /* 128 bit AMBA AHB data bus width */
+
+/* Bitfields in DMACFG. */
+#define GEM_FBLDO_OFFSET 0 /* fixed burst length for DMA */
+#define GEM_FBLDO_SIZE 5
+#define GEM_ENDIA_DESC_OFFSET 6 /* endian swap mode for management descriptor access */
+#define GEM_ENDIA_DESC_SIZE 1
+#define GEM_ENDIA_PKT_OFFSET 7 /* endian swap mode for packet data access */
+#define GEM_ENDIA_PKT_SIZE 1
+#define GEM_RXBMS_OFFSET 8 /* RX packet buffer memory size select */
+#define GEM_RXBMS_SIZE 2
+#define GEM_TXPBMS_OFFSET 10 /* TX packet buffer memory size select */
+#define GEM_TXPBMS_SIZE 1
+#define GEM_TXCOEN_OFFSET 11 /* TX IP/TCP/UDP checksum gen offload */
+#define GEM_TXCOEN_SIZE 1
+#define GEM_RXBS_OFFSET 16 /* DMA receive buffer size */
+#define GEM_RXBS_SIZE 8
+#define GEM_DDRP_OFFSET 24 /* disc_when_no_ahb */
+#define GEM_DDRP_SIZE 1
+#define GEM_RXEXT_OFFSET 28 /* RX extended Buffer Descriptor mode */
+#define GEM_RXEXT_SIZE 1
+#define GEM_TXEXT_OFFSET 29 /* TX extended Buffer Descriptor mode */
+#define GEM_TXEXT_SIZE 1
+#define GEM_ADDR64_OFFSET 30 /* Address bus width - 64b or 32b */
+#define GEM_ADDR64_SIZE 1
+
+
+/* Bitfields in NSR */
+#define MACB_NSR_LINK_OFFSET 0 /* pcs_link_state */
+#define MACB_NSR_LINK_SIZE 1
+#define MACB_MDIO_OFFSET 1 /* status of the mdio_in pin */
+#define MACB_MDIO_SIZE 1
+#define MACB_IDLE_OFFSET 2 /* The PHY management logic is idle */
+#define MACB_IDLE_SIZE 1
+
+/* Bitfields in TSR */
+#define MACB_UBR_OFFSET 0 /* Used bit read */
+#define MACB_UBR_SIZE 1
+#define MACB_COL_OFFSET 1 /* Collision occurred */
+#define MACB_COL_SIZE 1
+#define MACB_TSR_RLE_OFFSET 2 /* Retry limit exceeded */
+#define MACB_TSR_RLE_SIZE 1
+#define MACB_TGO_OFFSET 3 /* Transmit go */
+#define MACB_TGO_SIZE 1
+#define MACB_BEX_OFFSET 4 /* TX frame corruption due to AHB error */
+#define MACB_BEX_SIZE 1
+#define MACB_RM9200_BNQ_OFFSET 4 /* AT91RM9200 only */
+#define MACB_RM9200_BNQ_SIZE 1 /* AT91RM9200 only */
+#define MACB_COMP_OFFSET 5 /* Trnasmit complete */
+#define MACB_COMP_SIZE 1
+#define MACB_UND_OFFSET 6 /* Trnasmit under run */
+#define MACB_UND_SIZE 1
+
+/* Bitfields in RSR */
+#define MACB_BNA_OFFSET 0 /* Buffer not available */
+#define MACB_BNA_SIZE 1
+#define MACB_REC_OFFSET 1 /* Frame received */
+#define MACB_REC_SIZE 1
+#define MACB_OVR_OFFSET 2 /* Receive overrun */
+#define MACB_OVR_SIZE 1
+
+/* Bitfields in ISR/IER/IDR/IMR */
+#define MACB_MFD_OFFSET 0 /* Management frame sent */
+#define MACB_MFD_SIZE 1
+#define MACB_RCOMP_OFFSET 1 /* Receive complete */
+#define MACB_RCOMP_SIZE 1
+#define MACB_RXUBR_OFFSET 2 /* RX used bit read */
+#define MACB_RXUBR_SIZE 1
+#define MACB_TXUBR_OFFSET 3 /* TX used bit read */
+#define MACB_TXUBR_SIZE 1
+#define MACB_ISR_TUND_OFFSET 4 /* Enable TX buffer under run interrupt */
+#define MACB_ISR_TUND_SIZE 1
+#define MACB_ISR_RLE_OFFSET 5 /* EN retry exceeded/late coll interrupt */
+#define MACB_ISR_RLE_SIZE 1
+#define MACB_TXERR_OFFSET 6 /* EN TX frame corrupt from error interrupt */
+#define MACB_TXERR_SIZE 1
+#define MACB_TCOMP_OFFSET 7 /* Enable transmit complete interrupt */
+#define MACB_TCOMP_SIZE 1
+#define MACB_ISR_LINK_OFFSET 9 /* Enable link change interrupt */
+#define MACB_ISR_LINK_SIZE 1
+#define MACB_ISR_ROVR_OFFSET 10 /* Enable receive overrun interrupt */
+#define MACB_ISR_ROVR_SIZE 1
+#define MACB_HRESP_OFFSET 11 /* Enable hrsep not OK interrupt */
+#define MACB_HRESP_SIZE 1
+#define MACB_PFR_OFFSET 12 /* Enable pause frame w/ quantum interrupt */
+#define MACB_PFR_SIZE 1
+#define MACB_PTZ_OFFSET 13 /* Enable pause time zero interrupt */
+#define MACB_PTZ_SIZE 1
+#define MACB_WOL_OFFSET 14 /* Enable wake-on-lan interrupt */
+#define MACB_WOL_SIZE 1
+#define MACB_DRQFR_OFFSET 18 /* PTP Delay Request Frame Received */
+#define MACB_DRQFR_SIZE 1
+#define MACB_SFR_OFFSET 19 /* PTP Sync Frame Received */
+#define MACB_SFR_SIZE 1
+#define MACB_DRQFT_OFFSET 20 /* PTP Delay Request Frame Transmitted */
+#define MACB_DRQFT_SIZE 1
+#define MACB_SFT_OFFSET 21 /* PTP Sync Frame Transmitted */
+#define MACB_SFT_SIZE 1
+#define MACB_PDRQFR_OFFSET 22 /* PDelay Request Frame Received */
+#define MACB_PDRQFR_SIZE 1
+#define MACB_PDRSFR_OFFSET 23 /* PDelay Response Frame Received */
+#define MACB_PDRSFR_SIZE 1
+#define MACB_PDRQFT_OFFSET 24 /* PDelay Request Frame Transmitted */
+#define MACB_PDRQFT_SIZE 1
+#define MACB_PDRSFT_OFFSET 25 /* PDelay Response Frame Transmitted */
+#define MACB_PDRSFT_SIZE 1
+#define MACB_SRI_OFFSET 26 /* TSU Seconds Register Increment */
+#define MACB_SRI_SIZE 1
+
+/* Timer increment fields */
+#define MACB_TI_CNS_OFFSET 0
+#define MACB_TI_CNS_SIZE 8
+#define MACB_TI_ACNS_OFFSET 8
+#define MACB_TI_ACNS_SIZE 8
+#define MACB_TI_NIT_OFFSET 16
+#define MACB_TI_NIT_SIZE 8
+
+/* Bitfields in MAN */
+#define MACB_DATA_OFFSET 0 /* data */
+#define MACB_DATA_SIZE 16
+#define MACB_CODE_OFFSET 16 /* Must be written to 10 */
+#define MACB_CODE_SIZE 2
+#define MACB_REGA_OFFSET 18 /* Register address */
+#define MACB_REGA_SIZE 5
+#define MACB_PHYA_OFFSET 23 /* PHY address */
+#define MACB_PHYA_SIZE 5
+#define MACB_RW_OFFSET 28 /* Operation. 10 is read. 01 is write. */
+#define MACB_RW_SIZE 2
+#define MACB_SOF_OFFSET 30 /* Must be written to 1 for Clause 22 */
+#define MACB_SOF_SIZE 2
+
+/* Bitfields in USRIO (AVR32) */
+#define MACB_MII_OFFSET 0
+#define MACB_MII_SIZE 1
+#define MACB_EAM_OFFSET 1
+#define MACB_EAM_SIZE 1
+#define MACB_TX_PAUSE_OFFSET 2
+#define MACB_TX_PAUSE_SIZE 1
+#define MACB_TX_PAUSE_ZERO_OFFSET 3
+#define MACB_TX_PAUSE_ZERO_SIZE 1
+
+/* Bitfields in USRIO (AT91) */
+#define MACB_RMII_OFFSET 0
+#define MACB_RMII_SIZE 1
+#define GEM_RGMII_OFFSET 0 /* GEM gigabit mode */
+#define GEM_RGMII_SIZE 1
+#define MACB_CLKEN_OFFSET 1
+#define MACB_CLKEN_SIZE 1
+
+/* Bitfields in WOL */
+#define MACB_IP_OFFSET 0
+#define MACB_IP_SIZE 16
+#define MACB_MAG_OFFSET 16
+#define MACB_MAG_SIZE 1
+#define MACB_ARP_OFFSET 17
+#define MACB_ARP_SIZE 1
+#define MACB_SA1_OFFSET 18
+#define MACB_SA1_SIZE 1
+#define MACB_WOL_MTI_OFFSET 19
+#define MACB_WOL_MTI_SIZE 1
+
+/* Bitfields in MID */
+#define MACB_IDNUM_OFFSET 16
+#define MACB_IDNUM_SIZE 12
+#define MACB_REV_OFFSET 0
+#define MACB_REV_SIZE 16
+
+/* Bitfields in DCFG1. */
+#define GEM_IRQCOR_OFFSET 23
+#define GEM_IRQCOR_SIZE 1
+#define GEM_DBWDEF_OFFSET 25
+#define GEM_DBWDEF_SIZE 3
+
+/* Bitfields in DCFG2. */
+#define GEM_RX_PKT_BUFF_OFFSET 20
+#define GEM_RX_PKT_BUFF_SIZE 1
+#define GEM_TX_PKT_BUFF_OFFSET 21
+#define GEM_TX_PKT_BUFF_SIZE 1
+
+
+/* Bitfields in DCFG5. */
+#define GEM_TSU_OFFSET 8
+#define GEM_TSU_SIZE 1
+
+/* Bitfields in DCFG6. */
+#define GEM_PBUF_LSO_OFFSET 27
+#define GEM_PBUF_LSO_SIZE 1
+#define GEM_DAW64_OFFSET 23
+#define GEM_DAW64_SIZE 1
+
+/* Bitfields in DCFG8. */
+#define GEM_T1SCR_OFFSET 24
+#define GEM_T1SCR_SIZE 8
+#define GEM_T2SCR_OFFSET 16
+#define GEM_T2SCR_SIZE 8
+#define GEM_SCR2ETH_OFFSET 8
+#define GEM_SCR2ETH_SIZE 8
+#define GEM_SCR2CMP_OFFSET 0
+#define GEM_SCR2CMP_SIZE 8
+
+/* Bitfields in DCFG10 */
+#define GEM_TXBD_RDBUFF_OFFSET 12
+#define GEM_TXBD_RDBUFF_SIZE 4
+#define GEM_RXBD_RDBUFF_OFFSET 8
+#define GEM_RXBD_RDBUFF_SIZE 4
+
+/* Bitfields in TISUBN */
+#define GEM_SUBNSINCR_OFFSET 0
+#define GEM_SUBNSINCR_SIZE 16
+
+/* Bitfields in TI */
+#define GEM_NSINCR_OFFSET 0
+#define GEM_NSINCR_SIZE 8
+
+/* Bitfields in TSH */
+#define GEM_TSH_OFFSET 0 /* TSU timer value (s). MSB [47:32] of seconds timer count */
+#define GEM_TSH_SIZE 16
+
+/* Bitfields in TSL */
+#define GEM_TSL_OFFSET 0 /* TSU timer value (s). LSB [31:0] of seconds timer count */
+#define GEM_TSL_SIZE 32
+
+/* Bitfields in TN */
+#define GEM_TN_OFFSET 0 /* TSU timer value (ns) */
+#define GEM_TN_SIZE 30
+
+/* Bitfields in TXBDCTRL */
+#define GEM_TXTSMODE_OFFSET 4 /* TX Descriptor Timestamp Insertion mode */
+#define GEM_TXTSMODE_SIZE 2
+
+/* Bitfields in RXBDCTRL */
+#define GEM_RXTSMODE_OFFSET 4 /* RX Descriptor Timestamp Insertion mode */
+#define GEM_RXTSMODE_SIZE 2
+
+/* Bitfields in SCRT2 */
+#define GEM_QUEUE_OFFSET 0 /* Queue Number */
+#define GEM_QUEUE_SIZE 4
+#define GEM_VLANPR_OFFSET 4 /* VLAN Priority */
+#define GEM_VLANPR_SIZE 3
+#define GEM_VLANEN_OFFSET 8 /* VLAN Enable */
+#define GEM_VLANEN_SIZE 1
+#define GEM_ETHT2IDX_OFFSET 9 /* Index to screener type 2 EtherType register */
+#define GEM_ETHT2IDX_SIZE 3
+#define GEM_ETHTEN_OFFSET 12 /* EtherType Enable */
+#define GEM_ETHTEN_SIZE 1
+#define GEM_CMPA_OFFSET 13 /* Compare A - Index to screener type 2 Compare register */
+#define GEM_CMPA_SIZE 5
+#define GEM_CMPAEN_OFFSET 18 /* Compare A Enable */
+#define GEM_CMPAEN_SIZE 1
+#define GEM_CMPB_OFFSET 19 /* Compare B - Index to screener type 2 Compare register */
+#define GEM_CMPB_SIZE 5
+#define GEM_CMPBEN_OFFSET 24 /* Compare B Enable */
+#define GEM_CMPBEN_SIZE 1
+#define GEM_CMPC_OFFSET 25 /* Compare C - Index to screener type 2 Compare register */
+#define GEM_CMPC_SIZE 5
+#define GEM_CMPCEN_OFFSET 30 /* Compare C Enable */
+#define GEM_CMPCEN_SIZE 1
+
+/* Bitfields in ETHT */
+#define GEM_ETHTCMP_OFFSET 0 /* EtherType compare value */
+#define GEM_ETHTCMP_SIZE 16
+
+/* Bitfields in T2CMPW0 */
+#define GEM_T2CMP_OFFSET 16 /* 0xFFFF0000 compare value */
+#define GEM_T2CMP_SIZE 16
+#define GEM_T2MASK_OFFSET 0 /* 0x0000FFFF compare value or mask */
+#define GEM_T2MASK_SIZE 16
+
+/* Bitfields in T2CMPW1 */
+#define GEM_T2DISMSK_OFFSET 9 /* disable mask */
+#define GEM_T2DISMSK_SIZE 1
+#define GEM_T2CMPOFST_OFFSET 7 /* compare offset */
+#define GEM_T2CMPOFST_SIZE 2
+#define GEM_T2OFST_OFFSET 0 /* offset value */
+#define GEM_T2OFST_SIZE 7
+
+/* Offset for screener type 2 compare values (T2CMPOFST).
+ * Note the offset is applied after the specified point,
+ * e.g. GEM_T2COMPOFST_ETYPE denotes the EtherType field, so an offset
+ * of 12 bytes from this would be the source IP address in an IP header
+ */
+#define GEM_T2COMPOFST_SOF 0
+#define GEM_T2COMPOFST_ETYPE 1
+#define GEM_T2COMPOFST_IPHDR 2
+#define GEM_T2COMPOFST_TCPUDP 3
+
+/* offset from EtherType to IP address */
+#define ETYPE_SRCIP_OFFSET 12
+#define ETYPE_DSTIP_OFFSET 16
+
+/* offset from IP header to port */
+#define IPHDR_SRCPORT_OFFSET 0
+#define IPHDR_DSTPORT_OFFSET 2
+
+/* Transmit DMA buffer descriptor Word 1 */
+#define GEM_DMA_TXVALID_OFFSET 23 /* timestamp has been captured in the Buffer Descriptor */
+#define GEM_DMA_TXVALID_SIZE 1
+
+/* Receive DMA buffer descriptor Word 0 */
+#define GEM_DMA_RXVALID_OFFSET 2 /* indicates a valid timestamp in the Buffer Descriptor */
+#define GEM_DMA_RXVALID_SIZE 1
+
+/* DMA buffer descriptor Word 2 (32 bit addressing) or Word 4 (64 bit addressing) */
+#define GEM_DMA_SECL_OFFSET 30 /* Timestamp seconds[1:0] */
+#define GEM_DMA_SECL_SIZE 2
+#define GEM_DMA_NSEC_OFFSET 0 /* Timestamp nanosecs [29:0] */
+#define GEM_DMA_NSEC_SIZE 30
+
+/* DMA buffer descriptor Word 3 (32 bit addressing) or Word 5 (64 bit addressing) */
+
+/* New hardware supports 12 bit precision of timestamp in DMA buffer descriptor.
+ * Old hardware supports only 6 bit precision but it is enough for PTP.
+ * Less accuracy is used always instead of checking hardware version.
+ */
+#define GEM_DMA_SECH_OFFSET 0 /* Timestamp seconds[5:2] */
+#define GEM_DMA_SECH_SIZE 4
+#define GEM_DMA_SEC_WIDTH (GEM_DMA_SECH_SIZE + GEM_DMA_SECL_SIZE)
+#define GEM_DMA_SEC_TOP (1 << GEM_DMA_SEC_WIDTH)
+#define GEM_DMA_SEC_MASK (GEM_DMA_SEC_TOP - 1)
+
+/* Bitfields in ADJ */
+#define GEM_ADDSUB_OFFSET 31
+#define GEM_ADDSUB_SIZE 1
+/* Constants for CLK */
+#define MACB_CLK_DIV8 0
+#define MACB_CLK_DIV16 1
+#define MACB_CLK_DIV32 2
+#define MACB_CLK_DIV64 3
+
+/* GEM specific constants for CLK. */
+#define GEM_CLK_DIV8 0
+#define GEM_CLK_DIV16 1
+#define GEM_CLK_DIV32 2
+#define GEM_CLK_DIV48 3
+#define GEM_CLK_DIV64 4
+#define GEM_CLK_DIV96 5
+
+/* Constants for MAN register */
+#define MACB_MAN_SOF 1
+#define MACB_MAN_WRITE 1
+#define MACB_MAN_READ 2
+#define MACB_MAN_CODE 2
+
+/* Capability mask bits */
+#define MACB_CAPS_ISR_CLEAR_ON_WRITE 0x00000001
+#define MACB_CAPS_USRIO_HAS_CLKEN 0x00000002
+#define MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII 0x00000004
+#define MACB_CAPS_NO_GIGABIT_HALF 0x00000008
+#define MACB_CAPS_USRIO_DISABLED 0x00000010
+#define MACB_CAPS_JUMBO 0x00000020
+#define MACB_CAPS_GEM_HAS_PTP 0x00000040
+#define MACB_CAPS_BD_RD_PREFETCH 0x00000080
+#define MACB_CAPS_FIFO_MODE 0x10000000
+#define MACB_CAPS_GIGABIT_MODE_AVAILABLE 0x20000000
+#define MACB_CAPS_SG_DISABLED 0x40000000
+#define MACB_CAPS_MACB_IS_GEM 0x80000000
+
+/* LSO settings */
+#define MACB_LSO_UFO_ENABLE 0x01
+#define MACB_LSO_TSO_ENABLE 0x02
+
+/* Bit manipulation macros */
+#define MACB_BIT(name) \
+ (1 << MACB_##name##_OFFSET)
+#define MACB_BF(name,value) \
+ (((value) & ((1 << MACB_##name##_SIZE) - 1)) \
+ << MACB_##name##_OFFSET)
+#define MACB_BFEXT(name,value)\
+ (((value) >> MACB_##name##_OFFSET) \
+ & ((1 << MACB_##name##_SIZE) - 1))
+#define MACB_BFINS(name,value,old) \
+ (((old) & ~(((1 << MACB_##name##_SIZE) - 1) \
+ << MACB_##name##_OFFSET)) \
+ | MACB_BF(name,value))
+
+#define GEM_BIT(name) \
+ (1 << GEM_##name##_OFFSET)
+#define GEM_BF(name, value) \
+ (((value) & ((1 << GEM_##name##_SIZE) - 1)) \
+ << GEM_##name##_OFFSET)
+#define GEM_BFEXT(name, value)\
+ (((value) >> GEM_##name##_OFFSET) \
+ & ((1 << GEM_##name##_SIZE) - 1))
+#define GEM_BFINS(name, value, old) \
+ (((old) & ~(((1 << GEM_##name##_SIZE) - 1) \
+ << GEM_##name##_OFFSET)) \
+ | GEM_BF(name, value))
+
+/* Register access macros */
+#define macb_readl(port, reg) (port)->macb_reg_readl((port), MACB_##reg)
+#define macb_writel(port, reg, value) (port)->macb_reg_writel((port), MACB_##reg, (value))
+#define gem_readl(port, reg) (port)->macb_reg_readl((port), GEM_##reg)
+#define gem_writel(port, reg, value) (port)->macb_reg_writel((port), GEM_##reg, (value))
+#define queue_readl(queue, reg) (queue)->bp->macb_reg_readl((queue)->bp, (queue)->reg)
+#define queue_writel(queue, reg, value) (queue)->bp->macb_reg_writel((queue)->bp, (queue)->reg, (value))
+#define gem_readl_n(port, reg, idx) (port)->macb_reg_readl((port), GEM_##reg + idx * 4)
+#define gem_writel_n(port, reg, idx, value) (port)->macb_reg_writel((port), GEM_##reg + idx * 4, (value))
+
+#define PTP_TS_BUFFER_SIZE 128 /* must be power of 2 */
+
+/* Conditional GEM/MACB macros. These perform the operation to the correct
+ * register dependent on whether the device is a GEM or a MACB. For registers
+ * and bitfields that are common across both devices, use macb_{read,write}l
+ * to avoid the cost of the conditional.
+ */
+#define macb_or_gem_writel(__bp, __reg, __value) \
+ ({ \
+ if (macb_is_gem((__bp))) \
+ gem_writel((__bp), __reg, __value); \
+ else \
+ macb_writel((__bp), __reg, __value); \
+ })
+
+#define macb_or_gem_readl(__bp, __reg) \
+ ({ \
+ u32 __v; \
+ if (macb_is_gem((__bp))) \
+ __v = gem_readl((__bp), __reg); \
+ else \
+ __v = macb_readl((__bp), __reg); \
+ __v; \
+ })
+
+/* struct macb_dma_desc - Hardware DMA descriptor
+ * @addr: DMA address of data buffer
+ * @ctrl: Control and status bits
+ */
+struct macb_dma_desc {
+ u32 addr;
+ u32 ctrl;
+};
+
+#ifdef MACB_EXT_DESC
+#define HW_DMA_CAP_32B 0
+#define HW_DMA_CAP_64B (1 << 0)
+#define HW_DMA_CAP_PTP (1 << 1)
+#define HW_DMA_CAP_64B_PTP (HW_DMA_CAP_64B | HW_DMA_CAP_PTP)
+
+struct macb_dma_desc_64 {
+ u32 addrh;
+ u32 resvd;
+};
+
+struct macb_dma_desc_ptp {
+ u32 ts_1;
+ u32 ts_2;
+};
+
+struct gem_tx_ts {
+ struct sk_buff *skb;
+ struct macb_dma_desc_ptp desc_ptp;
+};
+#endif
+
+/* DMA descriptor bitfields */
+#define MACB_RX_USED_OFFSET 0
+#define MACB_RX_USED_SIZE 1
+#define MACB_RX_WRAP_OFFSET 1
+#define MACB_RX_WRAP_SIZE 1
+#define MACB_RX_WADDR_OFFSET 2
+#define MACB_RX_WADDR_SIZE 30
+
+#define MACB_RX_FRMLEN_OFFSET 0
+#define MACB_RX_FRMLEN_SIZE 12
+#define MACB_RX_OFFSET_OFFSET 12
+#define MACB_RX_OFFSET_SIZE 2
+#define MACB_RX_SOF_OFFSET 14
+#define MACB_RX_SOF_SIZE 1
+#define MACB_RX_EOF_OFFSET 15
+#define MACB_RX_EOF_SIZE 1
+#define MACB_RX_CFI_OFFSET 16
+#define MACB_RX_CFI_SIZE 1
+#define MACB_RX_VLAN_PRI_OFFSET 17
+#define MACB_RX_VLAN_PRI_SIZE 3
+#define MACB_RX_PRI_TAG_OFFSET 20
+#define MACB_RX_PRI_TAG_SIZE 1
+#define MACB_RX_VLAN_TAG_OFFSET 21
+#define MACB_RX_VLAN_TAG_SIZE 1
+#define MACB_RX_TYPEID_MATCH_OFFSET 22
+#define MACB_RX_TYPEID_MATCH_SIZE 1
+#define MACB_RX_SA4_MATCH_OFFSET 23
+#define MACB_RX_SA4_MATCH_SIZE 1
+#define MACB_RX_SA3_MATCH_OFFSET 24
+#define MACB_RX_SA3_MATCH_SIZE 1
+#define MACB_RX_SA2_MATCH_OFFSET 25
+#define MACB_RX_SA2_MATCH_SIZE 1
+#define MACB_RX_SA1_MATCH_OFFSET 26
+#define MACB_RX_SA1_MATCH_SIZE 1
+#define MACB_RX_EXT_MATCH_OFFSET 28
+#define MACB_RX_EXT_MATCH_SIZE 1
+#define MACB_RX_UHASH_MATCH_OFFSET 29
+#define MACB_RX_UHASH_MATCH_SIZE 1
+#define MACB_RX_MHASH_MATCH_OFFSET 30
+#define MACB_RX_MHASH_MATCH_SIZE 1
+#define MACB_RX_BROADCAST_OFFSET 31
+#define MACB_RX_BROADCAST_SIZE 1
+
+#define MACB_RX_FRMLEN_MASK 0xFFF
+#define MACB_RX_JFRMLEN_MASK 0x3FFF
+
+/* RX checksum offload disabled: bit 24 clear in NCFGR */
+#define GEM_RX_TYPEID_MATCH_OFFSET 22
+#define GEM_RX_TYPEID_MATCH_SIZE 2
+
+/* RX checksum offload enabled: bit 24 set in NCFGR */
+#define GEM_RX_CSUM_OFFSET 22
+#define GEM_RX_CSUM_SIZE 2
+
+#define MACB_TX_FRMLEN_OFFSET 0
+#define MACB_TX_FRMLEN_SIZE 11
+#define MACB_TX_LAST_OFFSET 15
+#define MACB_TX_LAST_SIZE 1
+#define MACB_TX_NOCRC_OFFSET 16
+#define MACB_TX_NOCRC_SIZE 1
+#define MACB_MSS_MFS_OFFSET 16
+#define MACB_MSS_MFS_SIZE 14
+#define MACB_TX_LSO_OFFSET 17
+#define MACB_TX_LSO_SIZE 2
+#define MACB_TX_TCP_SEQ_SRC_OFFSET 19
+#define MACB_TX_TCP_SEQ_SRC_SIZE 1
+#define MACB_TX_BUF_EXHAUSTED_OFFSET 27
+#define MACB_TX_BUF_EXHAUSTED_SIZE 1
+#define MACB_TX_UNDERRUN_OFFSET 28
+#define MACB_TX_UNDERRUN_SIZE 1
+#define MACB_TX_ERROR_OFFSET 29
+#define MACB_TX_ERROR_SIZE 1
+#define MACB_TX_WRAP_OFFSET 30
+#define MACB_TX_WRAP_SIZE 1
+#define MACB_TX_USED_OFFSET 31
+#define MACB_TX_USED_SIZE 1
+
+#define GEM_TX_FRMLEN_OFFSET 0
+#define GEM_TX_FRMLEN_SIZE 14
+
+/* Buffer descriptor constants */
+#define GEM_RX_CSUM_NONE 0
+#define GEM_RX_CSUM_IP_ONLY 1
+#define GEM_RX_CSUM_IP_TCP 2
+#define GEM_RX_CSUM_IP_UDP 3
+
+/* limit RX checksum offload to TCP and UDP packets */
+#define GEM_RX_CSUM_CHECKED_MASK 2
+
+/* struct macb_tx_skb - data about an skb which is being transmitted
+ * @skb: skb currently being transmitted, only set for the last buffer
+ * of the frame
+ * @mapping: DMA address of the skb's fragment buffer
+ * @size: size of the DMA mapped buffer
+ * @mapped_as_page: true when buffer was mapped with skb_frag_dma_map(),
+ * false when buffer was mapped with dma_map_single()
+ */
+struct macb_tx_skb {
+ struct sk_buff *skb;
+ dma_addr_t mapping;
+ size_t size;
+ bool mapped_as_page;
+};
+
+/* Hardware-collected statistics. Used when updating the network
+ * device stats by a periodic timer.
+ */
+struct macb_stats {
+ u32 rx_pause_frames;
+ u32 tx_ok;
+ u32 tx_single_cols;
+ u32 tx_multiple_cols;
+ u32 rx_ok;
+ u32 rx_fcs_errors;
+ u32 rx_align_errors;
+ u32 tx_deferred;
+ u32 tx_late_cols;
+ u32 tx_excessive_cols;
+ u32 tx_underruns;
+ u32 tx_carrier_errors;
+ u32 rx_resource_errors;
+ u32 rx_overruns;
+ u32 rx_symbol_errors;
+ u32 rx_oversize_pkts;
+ u32 rx_jabbers;
+ u32 rx_undersize_pkts;
+ u32 sqe_test_errors;
+ u32 rx_length_mismatch;
+ u32 tx_pause_frames;
+};
+
+struct gem_stats {
+ u32 tx_octets_31_0;
+ u32 tx_octets_47_32;
+ u32 tx_frames;
+ u32 tx_broadcast_frames;
+ u32 tx_multicast_frames;
+ u32 tx_pause_frames;
+ u32 tx_64_byte_frames;
+ u32 tx_65_127_byte_frames;
+ u32 tx_128_255_byte_frames;
+ u32 tx_256_511_byte_frames;
+ u32 tx_512_1023_byte_frames;
+ u32 tx_1024_1518_byte_frames;
+ u32 tx_greater_than_1518_byte_frames;
+ u32 tx_underrun;
+ u32 tx_single_collision_frames;
+ u32 tx_multiple_collision_frames;
+ u32 tx_excessive_collisions;
+ u32 tx_late_collisions;
+ u32 tx_deferred_frames;
+ u32 tx_carrier_sense_errors;
+ u32 rx_octets_31_0;
+ u32 rx_octets_47_32;
+ u32 rx_frames;
+ u32 rx_broadcast_frames;
+ u32 rx_multicast_frames;
+ u32 rx_pause_frames;
+ u32 rx_64_byte_frames;
+ u32 rx_65_127_byte_frames;
+ u32 rx_128_255_byte_frames;
+ u32 rx_256_511_byte_frames;
+ u32 rx_512_1023_byte_frames;
+ u32 rx_1024_1518_byte_frames;
+ u32 rx_greater_than_1518_byte_frames;
+ u32 rx_undersized_frames;
+ u32 rx_oversize_frames;
+ u32 rx_jabbers;
+ u32 rx_frame_check_sequence_errors;
+ u32 rx_length_field_frame_errors;
+ u32 rx_symbol_errors;
+ u32 rx_alignment_errors;
+ u32 rx_resource_errors;
+ u32 rx_overruns;
+ u32 rx_ip_header_checksum_errors;
+ u32 rx_tcp_checksum_errors;
+ u32 rx_udp_checksum_errors;
+};
+
+/* Describes the name and offset of an individual statistic register, as
+ * returned by `ethtool -S`. Also describes which net_device_stats statistics
+ * this register should contribute to.
+ */
+struct gem_statistic {
+ char stat_string[ETH_GSTRING_LEN];
+ int offset;
+ u32 stat_bits;
+};
+
+/* Bitfield defs for net_device_stat statistics */
+#define GEM_NDS_RXERR_OFFSET 0
+#define GEM_NDS_RXLENERR_OFFSET 1
+#define GEM_NDS_RXOVERERR_OFFSET 2
+#define GEM_NDS_RXCRCERR_OFFSET 3
+#define GEM_NDS_RXFRAMEERR_OFFSET 4
+#define GEM_NDS_RXFIFOERR_OFFSET 5
+#define GEM_NDS_TXERR_OFFSET 6
+#define GEM_NDS_TXABORTEDERR_OFFSET 7
+#define GEM_NDS_TXCARRIERERR_OFFSET 8
+#define GEM_NDS_TXFIFOERR_OFFSET 9
+#define GEM_NDS_COLLISIONS_OFFSET 10
+
+#define GEM_STAT_TITLE(name, title) GEM_STAT_TITLE_BITS(name, title, 0)
+#define GEM_STAT_TITLE_BITS(name, title, bits) { \
+ .stat_string = title, \
+ .offset = GEM_##name, \
+ .stat_bits = bits \
+}
+
+/* list of gem statistic registers. The names MUST match the
+ * corresponding GEM_* definitions.
+ */
+static const struct gem_statistic gem_statistics[] = {
+ GEM_STAT_TITLE(OCTTXL, "tx_octets"), /* OCTTXH combined with OCTTXL */
+ GEM_STAT_TITLE(TXCNT, "tx_frames"),
+ GEM_STAT_TITLE(TXBCCNT, "tx_broadcast_frames"),
+ GEM_STAT_TITLE(TXMCCNT, "tx_multicast_frames"),
+ GEM_STAT_TITLE(TXPAUSECNT, "tx_pause_frames"),
+ GEM_STAT_TITLE(TX64CNT, "tx_64_byte_frames"),
+ GEM_STAT_TITLE(TX65CNT, "tx_65_127_byte_frames"),
+ GEM_STAT_TITLE(TX128CNT, "tx_128_255_byte_frames"),
+ GEM_STAT_TITLE(TX256CNT, "tx_256_511_byte_frames"),
+ GEM_STAT_TITLE(TX512CNT, "tx_512_1023_byte_frames"),
+ GEM_STAT_TITLE(TX1024CNT, "tx_1024_1518_byte_frames"),
+ GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frames"),
+ GEM_STAT_TITLE_BITS(TXURUNCNT, "tx_underrun",
+ GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_TXFIFOERR)),
+ GEM_STAT_TITLE_BITS(SNGLCOLLCNT, "tx_single_collision_frames",
+ GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
+ GEM_STAT_TITLE_BITS(MULTICOLLCNT, "tx_multiple_collision_frames",
+ GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
+ GEM_STAT_TITLE_BITS(EXCESSCOLLCNT, "tx_excessive_collisions",
+ GEM_BIT(NDS_TXERR)|
+ GEM_BIT(NDS_TXABORTEDERR)|
+ GEM_BIT(NDS_COLLISIONS)),
+ GEM_STAT_TITLE_BITS(LATECOLLCNT, "tx_late_collisions",
+ GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
+ GEM_STAT_TITLE(TXDEFERCNT, "tx_deferred_frames"),
+ GEM_STAT_TITLE_BITS(TXCSENSECNT, "tx_carrier_sense_errors",
+ GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
+ GEM_STAT_TITLE(OCTRXL, "rx_octets"), /* OCTRXH combined with OCTRXL */
+ GEM_STAT_TITLE(RXCNT, "rx_frames"),
+ GEM_STAT_TITLE(RXBROADCNT, "rx_broadcast_frames"),
+ GEM_STAT_TITLE(RXMULTICNT, "rx_multicast_frames"),
+ GEM_STAT_TITLE(RXPAUSECNT, "rx_pause_frames"),
+ GEM_STAT_TITLE(RX64CNT, "rx_64_byte_frames"),
+ GEM_STAT_TITLE(RX65CNT, "rx_65_127_byte_frames"),
+ GEM_STAT_TITLE(RX128CNT, "rx_128_255_byte_frames"),
+ GEM_STAT_TITLE(RX256CNT, "rx_256_511_byte_frames"),
+ GEM_STAT_TITLE(RX512CNT, "rx_512_1023_byte_frames"),
+ GEM_STAT_TITLE(RX1024CNT, "rx_1024_1518_byte_frames"),
+ GEM_STAT_TITLE(RX1519CNT, "rx_greater_than_1518_byte_frames"),
+ GEM_STAT_TITLE_BITS(RXUNDRCNT, "rx_undersized_frames",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
+ GEM_STAT_TITLE_BITS(RXOVRCNT, "rx_oversize_frames",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
+ GEM_STAT_TITLE_BITS(RXJABCNT, "rx_jabbers",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
+ GEM_STAT_TITLE_BITS(RXFCSCNT, "rx_frame_check_sequence_errors",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXCRCERR)),
+ GEM_STAT_TITLE_BITS(RXLENGTHCNT, "rx_length_field_frame_errors",
+ GEM_BIT(NDS_RXERR)),
+ GEM_STAT_TITLE_BITS(RXSYMBCNT, "rx_symbol_errors",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXFRAMEERR)),
+ GEM_STAT_TITLE_BITS(RXALIGNCNT, "rx_alignment_errors",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXOVERERR)),
+ GEM_STAT_TITLE_BITS(RXRESERRCNT, "rx_resource_errors",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXOVERERR)),
+ GEM_STAT_TITLE_BITS(RXORCNT, "rx_overruns",
+ GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXFIFOERR)),
+ GEM_STAT_TITLE_BITS(RXIPCCNT, "rx_ip_header_checksum_errors",
+ GEM_BIT(NDS_RXERR)),
+ GEM_STAT_TITLE_BITS(RXTCPCCNT, "rx_tcp_checksum_errors",
+ GEM_BIT(NDS_RXERR)),
+ GEM_STAT_TITLE_BITS(RXUDPCCNT, "rx_udp_checksum_errors",
+ GEM_BIT(NDS_RXERR)),
+};
+
+#define GEM_STATS_LEN ARRAY_SIZE(gem_statistics)
+
+#define QUEUE_STAT_TITLE(title) { \
+ .stat_string = title, \
+}
+
+/* per queue statistics, each should be unsigned long type */
+struct queue_stats {
+ union {
+ unsigned long first;
+ unsigned long rx_packets;
+ };
+ unsigned long rx_bytes;
+ unsigned long rx_dropped;
+ unsigned long tx_packets;
+ unsigned long tx_bytes;
+ unsigned long tx_dropped;
+};
+
+static const struct gem_statistic queue_statistics[] = {
+ QUEUE_STAT_TITLE("rx_packets"),
+ QUEUE_STAT_TITLE("rx_bytes"),
+ QUEUE_STAT_TITLE("rx_dropped"),
+ QUEUE_STAT_TITLE("tx_packets"),
+ QUEUE_STAT_TITLE("tx_bytes"),
+ QUEUE_STAT_TITLE("tx_dropped"),
+};
+
+#define QUEUE_STATS_LEN ARRAY_SIZE(queue_statistics)
+
+struct macb;
+struct macb_queue;
+
+struct macb_or_gem_ops {
+ int (*mog_alloc_rx_buffers)(struct macb *bp);
+ void (*mog_free_rx_buffers)(struct macb *bp);
+ void (*mog_init_rings)(struct macb *bp);
+ int (*mog_rx)(struct macb_queue *queue, int budget);
+};
+
+/* MACB-PTP interface: adapt to platform needs. */
+struct macb_ptp_info {
+ void (*ptp_init)(struct net_device *ndev);
+ void (*ptp_remove)(struct net_device *ndev);
+ s32 (*get_ptp_max_adj)(void);
+ unsigned int (*get_tsu_rate)(struct macb *bp);
+ int (*get_ts_info)(struct net_device *dev,
+ struct ethtool_ts_info *info);
+ int (*get_hwtst)(struct net_device *netdev,
+ struct ifreq *ifr);
+ int (*set_hwtst)(struct net_device *netdev,
+ struct ifreq *ifr, int cmd);
+};
+
+struct macb_config {
+ u32 caps;
+ unsigned int dma_burst_length;
+ int (*clk_init)(struct platform_device *pdev, struct clk **pclk,
+ struct clk **hclk, struct clk **tx_clk,
+ struct clk **rx_clk);
+ int (*init)(struct platform_device *pdev);
+ int jumbo_max_len;
+};
+
+struct tsu_incr {
+ u32 sub_ns;
+ u32 ns;
+};
+
+struct macb_queue {
+ struct macb *bp;
+ int irq;
+
+ unsigned int ISR;
+ unsigned int IER;
+ unsigned int IDR;
+ unsigned int IMR;
+ unsigned int TBQP;
+ unsigned int TBQPH;
+ unsigned int RBQS;
+ unsigned int RBQP;
+ unsigned int RBQPH;
+
+ unsigned int tx_head, tx_tail;
+ struct macb_dma_desc *tx_ring;
+ struct macb_tx_skb *tx_skb;
+ dma_addr_t tx_ring_dma;
+ struct work_struct tx_error_task;
+
+ dma_addr_t rx_ring_dma;
+ dma_addr_t rx_buffers_dma;
+ unsigned int rx_tail;
+ unsigned int rx_prepared_head;
+ struct macb_dma_desc *rx_ring;
+ struct sk_buff **rx_skbuff;
+ void *rx_buffers;
+ struct napi_struct napi;
+ struct queue_stats stats;
+
+#ifdef CONFIG_MACB_USE_HWSTAMP
+ struct work_struct tx_ts_task;
+ unsigned int tx_ts_head, tx_ts_tail;
+ struct gem_tx_ts tx_timestamps[PTP_TS_BUFFER_SIZE];
+#endif
+};
+
+struct ethtool_rx_fs_item {
+ struct ethtool_rx_flow_spec fs;
+ struct list_head list;
+};
+
+struct ethtool_rx_fs_list {
+ struct list_head list;
+ unsigned int count;
+};
+
+struct macb {
+ void __iomem *regs;
+ bool native_io;
+
+ /* hardware IO accessors */
+ u32 (*macb_reg_readl)(struct macb *bp, int offset);
+ void (*macb_reg_writel)(struct macb *bp, int offset, u32 value);
+
+ size_t rx_buffer_size;
+
+ unsigned int rx_ring_size;
+ unsigned int tx_ring_size;
+
+ unsigned int num_queues;
+ unsigned int queue_mask;
+ struct macb_queue queues[MACB_MAX_QUEUES];
+
+ spinlock_t lock;
+ struct platform_device *pdev;
+ struct clk *pclk;
+ struct clk *hclk;
+ struct clk *tx_clk;
+ struct clk *rx_clk;
+ struct net_device *dev;
+ union {
+ struct macb_stats macb;
+ struct gem_stats gem;
+ } hw_stats;
+
+ struct macb_or_gem_ops macbgem_ops;
+
+ struct mii_bus *mii_bus;
+ struct device_node *phy_node;
+ int link;
+ int speed;
+ int duplex;
+
+ u32 caps;
+ unsigned int dma_burst_length;
+
+ phy_interface_t phy_interface;
+
+ /* AT91RM9200 transmit */
+ struct sk_buff *skb; /* holds skb until xmit interrupt completes */
+ dma_addr_t skb_physaddr; /* phys addr from pci_map_single */
+ int skb_length; /* saved skb length for pci_unmap_single */
+ unsigned int max_tx_length;
+
+ u64 ethtool_stats[GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES];
+
+ unsigned int rx_frm_len_mask;
+ unsigned int jumbo_max_len;
+
+ u32 wol;
+
+ struct macb_ptp_info *ptp_info; /* macb-ptp interface */
+#ifdef MACB_EXT_DESC
+ uint8_t hw_dma_cap;
+#endif
+ spinlock_t tsu_clk_lock; /* gem tsu clock locking */
+ unsigned int tsu_rate;
+ struct ptp_clock *ptp_clock;
+ struct ptp_clock_info ptp_clock_info;
+ struct tsu_incr tsu_incr;
+ struct hwtstamp_config tstamp_config;
+
+ /* RX queue filer rule set*/
+ struct ethtool_rx_fs_list rx_fs_list;
+ spinlock_t rx_fs_lock;
+ unsigned int max_tuples;
+
+ struct tasklet_struct hresp_err_tasklet;
+
+ int rx_bd_rd_prefetch;
+ int tx_bd_rd_prefetch;
+};
+
+#ifdef CONFIG_MACB_USE_HWSTAMP
+#define GEM_TSEC_SIZE (GEM_TSH_SIZE + GEM_TSL_SIZE)
+#define TSU_SEC_MAX_VAL (((u64)1 << GEM_TSEC_SIZE) - 1)
+#define TSU_NSEC_MAX_VAL ((1 << GEM_TN_SIZE) - 1)
+
+enum macb_bd_control {
+ TSTAMP_DISABLED,
+ TSTAMP_FRAME_PTP_EVENT_ONLY,
+ TSTAMP_ALL_PTP_FRAMES,
+ TSTAMP_ALL_FRAMES,
+};
+
+void gem_ptp_init(struct net_device *ndev);
+void gem_ptp_remove(struct net_device *ndev);
+int gem_ptp_txstamp(struct macb_queue *queue, struct sk_buff *skb, struct macb_dma_desc *des);
+void gem_ptp_rxstamp(struct macb *bp, struct sk_buff *skb, struct macb_dma_desc *desc);
+static inline int gem_ptp_do_txstamp(struct macb_queue *queue, struct sk_buff *skb, struct macb_dma_desc *desc)
+{
+ if (queue->bp->tstamp_config.tx_type == TSTAMP_DISABLED)
+ return -ENOTSUPP;
+
+ return gem_ptp_txstamp(queue, skb, desc);
+}
+
+static inline void gem_ptp_do_rxstamp(struct macb *bp, struct sk_buff *skb, struct macb_dma_desc *desc)
+{
+ if (bp->tstamp_config.rx_filter == TSTAMP_DISABLED)
+ return;
+
+ gem_ptp_rxstamp(bp, skb, desc);
+}
+int gem_get_hwtst(struct net_device *dev, struct ifreq *rq);
+int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd);
+#else
+static inline void gem_ptp_init(struct net_device *ndev) { }
+static inline void gem_ptp_remove(struct net_device *ndev) { }
+
+static inline int gem_ptp_do_txstamp(struct macb_queue *queue, struct sk_buff *skb, struct macb_dma_desc *desc)
+{
+ return -1;
+}
+
+static inline void gem_ptp_do_rxstamp(struct macb *bp, struct sk_buff *skb, struct macb_dma_desc *desc) { }
+#endif
+
+static inline bool macb_is_gem(struct macb *bp)
+{
+ return !!(bp->caps & MACB_CAPS_MACB_IS_GEM);
+}
+
+static inline bool gem_has_ptp(struct macb *bp)
+{
+ return !!(bp->caps & MACB_CAPS_GEM_HAS_PTP);
+}
+
+#endif /* _MACB_H */
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
new file mode 100644
index 0000000..58b9744
--- /dev/null
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -0,0 +1,4220 @@
+/*
+ * Cadence MACB/GEM Ethernet Controller driver
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/clk.h>
+#include <linux/crc32.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/circ_buf.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_data/macb.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <linux/tcp.h>
+#include "macb.h"
+
+#define MACB_RX_BUFFER_SIZE 128
+#define RX_BUFFER_MULTIPLE 64 /* bytes */
+
+#define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */
+#define MIN_RX_RING_SIZE 64
+#define MAX_RX_RING_SIZE 8192
+#define RX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
+ * (bp)->rx_ring_size)
+
+#define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */
+#define MIN_TX_RING_SIZE 64
+#define MAX_TX_RING_SIZE 4096
+#define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
+ * (bp)->tx_ring_size)
+
+/* level of occupied TX descriptors under which we wake up TX process */
+#define MACB_TX_WAKEUP_THRESH(bp) (3 * (bp)->tx_ring_size / 4)
+
+#define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \
+ | MACB_BIT(ISR_ROVR))
+#define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \
+ | MACB_BIT(ISR_RLE) \
+ | MACB_BIT(TXERR))
+#define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP))
+
+/* Max length of transmit frame must be a multiple of 8 bytes */
+#define MACB_TX_LEN_ALIGN 8
+#define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
+#define GEM_MAX_TX_LEN ((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
+
+#define GEM_MTU_MIN_SIZE ETH_MIN_MTU
+#define MACB_NETIF_LSO NETIF_F_TSO
+
+#define MACB_WOL_HAS_MAGIC_PACKET (0x1 << 0)
+#define MACB_WOL_ENABLED (0x1 << 1)
+
+/* Graceful stop timeouts in us. We should allow up to
+ * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
+ */
+#define MACB_HALT_TIMEOUT 1230
+
+/* DMA buffer descriptor might be different size
+ * depends on hardware configuration:
+ *
+ * 1. dma address width 32 bits:
+ * word 1: 32 bit address of Data Buffer
+ * word 2: control
+ *
+ * 2. dma address width 64 bits:
+ * word 1: 32 bit address of Data Buffer
+ * word 2: control
+ * word 3: upper 32 bit address of Data Buffer
+ * word 4: unused
+ *
+ * 3. dma address width 32 bits with hardware timestamping:
+ * word 1: 32 bit address of Data Buffer
+ * word 2: control
+ * word 3: timestamp word 1
+ * word 4: timestamp word 2
+ *
+ * 4. dma address width 64 bits with hardware timestamping:
+ * word 1: 32 bit address of Data Buffer
+ * word 2: control
+ * word 3: upper 32 bit address of Data Buffer
+ * word 4: unused
+ * word 5: timestamp word 1
+ * word 6: timestamp word 2
+ */
+static unsigned int macb_dma_desc_get_size(struct macb *bp)
+{
+#ifdef MACB_EXT_DESC
+ unsigned int desc_size;
+
+ switch (bp->hw_dma_cap) {
+ case HW_DMA_CAP_64B:
+ desc_size = sizeof(struct macb_dma_desc)
+ + sizeof(struct macb_dma_desc_64);
+ break;
+ case HW_DMA_CAP_PTP:
+ desc_size = sizeof(struct macb_dma_desc)
+ + sizeof(struct macb_dma_desc_ptp);
+ break;
+ case HW_DMA_CAP_64B_PTP:
+ desc_size = sizeof(struct macb_dma_desc)
+ + sizeof(struct macb_dma_desc_64)
+ + sizeof(struct macb_dma_desc_ptp);
+ break;
+ default:
+ desc_size = sizeof(struct macb_dma_desc);
+ }
+ return desc_size;
+#endif
+ return sizeof(struct macb_dma_desc);
+}
+
+static unsigned int macb_adj_dma_desc_idx(struct macb *bp, unsigned int desc_idx)
+{
+#ifdef MACB_EXT_DESC
+ switch (bp->hw_dma_cap) {
+ case HW_DMA_CAP_64B:
+ case HW_DMA_CAP_PTP:
+ desc_idx <<= 1;
+ break;
+ case HW_DMA_CAP_64B_PTP:
+ desc_idx *= 3;
+ break;
+ default:
+ break;
+ }
+#endif
+ return desc_idx;
+}
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+static struct macb_dma_desc_64 *macb_64b_desc(struct macb *bp, struct macb_dma_desc *desc)
+{
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ return (struct macb_dma_desc_64 *)((void *)desc + sizeof(struct macb_dma_desc));
+ return NULL;
+}
+#endif
+
+/* Ring buffer accessors */
+static unsigned int macb_tx_ring_wrap(struct macb *bp, unsigned int index)
+{
+ return index & (bp->tx_ring_size - 1);
+}
+
+static struct macb_dma_desc *macb_tx_desc(struct macb_queue *queue,
+ unsigned int index)
+{
+ index = macb_tx_ring_wrap(queue->bp, index);
+ index = macb_adj_dma_desc_idx(queue->bp, index);
+ return &queue->tx_ring[index];
+}
+
+static struct macb_tx_skb *macb_tx_skb(struct macb_queue *queue,
+ unsigned int index)
+{
+ return &queue->tx_skb[macb_tx_ring_wrap(queue->bp, index)];
+}
+
+static dma_addr_t macb_tx_dma(struct macb_queue *queue, unsigned int index)
+{
+ dma_addr_t offset;
+
+ offset = macb_tx_ring_wrap(queue->bp, index) *
+ macb_dma_desc_get_size(queue->bp);
+
+ return queue->tx_ring_dma + offset;
+}
+
+static unsigned int macb_rx_ring_wrap(struct macb *bp, unsigned int index)
+{
+ return index & (bp->rx_ring_size - 1);
+}
+
+static struct macb_dma_desc *macb_rx_desc(struct macb_queue *queue, unsigned int index)
+{
+ index = macb_rx_ring_wrap(queue->bp, index);
+ index = macb_adj_dma_desc_idx(queue->bp, index);
+ return &queue->rx_ring[index];
+}
+
+static void *macb_rx_buffer(struct macb_queue *queue, unsigned int index)
+{
+ return queue->rx_buffers + queue->bp->rx_buffer_size *
+ macb_rx_ring_wrap(queue->bp, index);
+}
+
+/* I/O accessors */
+static u32 hw_readl_native(struct macb *bp, int offset)
+{
+ return __raw_readl(bp->regs + offset);
+}
+
+static void hw_writel_native(struct macb *bp, int offset, u32 value)
+{
+ __raw_writel(value, bp->regs + offset);
+}
+
+static u32 hw_readl(struct macb *bp, int offset)
+{
+ return readl_relaxed(bp->regs + offset);
+}
+
+static void hw_writel(struct macb *bp, int offset, u32 value)
+{
+ writel_relaxed(value, bp->regs + offset);
+}
+
+/* Find the CPU endianness by using the loopback bit of NCR register. When the
+ * CPU is in big endian we need to program swapped mode for management
+ * descriptor access.
+ */
+static bool hw_is_native_io(void __iomem *addr)
+{
+ u32 value = MACB_BIT(LLB);
+
+ __raw_writel(value, addr + MACB_NCR);
+ value = __raw_readl(addr + MACB_NCR);
+
+ /* Write 0 back to disable everything */
+ __raw_writel(0, addr + MACB_NCR);
+
+ return value == MACB_BIT(LLB);
+}
+
+static bool hw_is_gem(void __iomem *addr, bool native_io)
+{
+ u32 id;
+
+ if (native_io)
+ id = __raw_readl(addr + MACB_MID);
+ else
+ id = readl_relaxed(addr + MACB_MID);
+
+ return MACB_BFEXT(IDNUM, id) >= 0x2;
+}
+
+static void macb_set_hwaddr(struct macb *bp)
+{
+ u32 bottom;
+ u16 top;
+
+ bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
+ macb_or_gem_writel(bp, SA1B, bottom);
+ top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
+ macb_or_gem_writel(bp, SA1T, top);
+
+ /* Clear unused address register sets */
+ macb_or_gem_writel(bp, SA2B, 0);
+ macb_or_gem_writel(bp, SA2T, 0);
+ macb_or_gem_writel(bp, SA3B, 0);
+ macb_or_gem_writel(bp, SA3T, 0);
+ macb_or_gem_writel(bp, SA4B, 0);
+ macb_or_gem_writel(bp, SA4T, 0);
+}
+
+static void macb_get_hwaddr(struct macb *bp)
+{
+ struct macb_platform_data *pdata;
+ u32 bottom;
+ u16 top;
+ u8 addr[6];
+ int i;
+
+ pdata = dev_get_platdata(&bp->pdev->dev);
+
+ /* Check all 4 address register for valid address */
+ for (i = 0; i < 4; i++) {
+ bottom = macb_or_gem_readl(bp, SA1B + i * 8);
+ top = macb_or_gem_readl(bp, SA1T + i * 8);
+
+ if (pdata && pdata->rev_eth_addr) {
+ addr[5] = bottom & 0xff;
+ addr[4] = (bottom >> 8) & 0xff;
+ addr[3] = (bottom >> 16) & 0xff;
+ addr[2] = (bottom >> 24) & 0xff;
+ addr[1] = top & 0xff;
+ addr[0] = (top & 0xff00) >> 8;
+ } else {
+ addr[0] = bottom & 0xff;
+ addr[1] = (bottom >> 8) & 0xff;
+ addr[2] = (bottom >> 16) & 0xff;
+ addr[3] = (bottom >> 24) & 0xff;
+ addr[4] = top & 0xff;
+ addr[5] = (top >> 8) & 0xff;
+ }
+
+ if (is_valid_ether_addr(addr)) {
+ memcpy(bp->dev->dev_addr, addr, sizeof(addr));
+ return;
+ }
+ }
+
+ dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
+ eth_hw_addr_random(bp->dev);
+}
+
+static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+ struct macb *bp = bus->priv;
+ int value;
+
+ macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
+ | MACB_BF(RW, MACB_MAN_READ)
+ | MACB_BF(PHYA, mii_id)
+ | MACB_BF(REGA, regnum)
+ | MACB_BF(CODE, MACB_MAN_CODE)));
+
+ /* wait for end of transfer */
+ while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
+ cpu_relax();
+
+ value = MACB_BFEXT(DATA, macb_readl(bp, MAN));
+
+ return value;
+}
+
+static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+ u16 value)
+{
+ struct macb *bp = bus->priv;
+
+ macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
+ | MACB_BF(RW, MACB_MAN_WRITE)
+ | MACB_BF(PHYA, mii_id)
+ | MACB_BF(REGA, regnum)
+ | MACB_BF(CODE, MACB_MAN_CODE)
+ | MACB_BF(DATA, value)));
+
+ /* wait for end of transfer */
+ while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR)))
+ cpu_relax();
+
+ return 0;
+}
+
+/**
+ * macb_set_tx_clk() - Set a clock to a new frequency
+ * @clk Pointer to the clock to change
+ * @rate New frequency in Hz
+ * @dev Pointer to the struct net_device
+ */
+static void macb_set_tx_clk(struct clk *clk, int speed, struct net_device *dev)
+{
+ long ferr, rate, rate_rounded;
+
+ if (!clk)
+ return;
+
+ switch (speed) {
+ case SPEED_10:
+ rate = 2500000;
+ break;
+ case SPEED_100:
+ rate = 25000000;
+ break;
+ case SPEED_1000:
+ rate = 125000000;
+ break;
+ default:
+ return;
+ }
+
+ rate_rounded = clk_round_rate(clk, rate);
+ if (rate_rounded < 0)
+ return;
+
+ /* RGMII allows 50 ppm frequency error. Test and warn if this limit
+ * is not satisfied.
+ */
+ ferr = abs(rate_rounded - rate);
+ ferr = DIV_ROUND_UP(ferr, rate / 100000);
+ if (ferr > 5)
+ netdev_warn(dev, "unable to generate target frequency: %ld Hz\n",
+ rate);
+
+ if (clk_set_rate(clk, rate_rounded))
+ netdev_err(dev, "adjusting tx_clk failed.\n");
+}
+
+static void macb_handle_link_change(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct phy_device *phydev = dev->phydev;
+ unsigned long flags;
+ int status_change = 0;
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ if (phydev->link) {
+ if ((bp->speed != phydev->speed) ||
+ (bp->duplex != phydev->duplex)) {
+ u32 reg;
+
+ reg = macb_readl(bp, NCFGR);
+ reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
+ if (macb_is_gem(bp))
+ reg &= ~GEM_BIT(GBE);
+
+ if (phydev->duplex)
+ reg |= MACB_BIT(FD);
+ if (phydev->speed == SPEED_100)
+ reg |= MACB_BIT(SPD);
+ if (phydev->speed == SPEED_1000 &&
+ bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
+ reg |= GEM_BIT(GBE);
+
+ macb_or_gem_writel(bp, NCFGR, reg);
+
+ bp->speed = phydev->speed;
+ bp->duplex = phydev->duplex;
+ status_change = 1;
+ }
+ }
+
+ if (phydev->link != bp->link) {
+ if (!phydev->link) {
+ bp->speed = 0;
+ bp->duplex = -1;
+ }
+ bp->link = phydev->link;
+
+ status_change = 1;
+ }
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ if (status_change) {
+ if (phydev->link) {
+ /* Update the TX clock rate if and only if the link is
+ * up and there has been a link change.
+ */
+ macb_set_tx_clk(bp->tx_clk, phydev->speed, dev);
+
+ netif_carrier_on(dev);
+ netdev_info(dev, "link up (%d/%s)\n",
+ phydev->speed,
+ phydev->duplex == DUPLEX_FULL ?
+ "Full" : "Half");
+ } else {
+ netif_carrier_off(dev);
+ netdev_info(dev, "link down\n");
+ }
+ }
+}
+
+/* based on au1000_eth. c*/
+static int macb_mii_probe(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct macb_platform_data *pdata;
+ struct phy_device *phydev;
+ struct device_node *np;
+ int phy_irq, ret, i;
+
+ pdata = dev_get_platdata(&bp->pdev->dev);
+ np = bp->pdev->dev.of_node;
+ ret = 0;
+
+ if (np) {
+ if (of_phy_is_fixed_link(np)) {
+ bp->phy_node = of_node_get(np);
+ } else {
+ bp->phy_node = of_parse_phandle(np, "phy-handle", 0);
+ /* fallback to standard phy registration if no
+ * phy-handle was found nor any phy found during
+ * dt phy registration
+ */
+ if (!bp->phy_node && !phy_find_first(bp->mii_bus)) {
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ struct phy_device *phydev;
+
+ phydev = mdiobus_scan(bp->mii_bus, i);
+ if (IS_ERR(phydev) &&
+ PTR_ERR(phydev) != -ENODEV) {
+ ret = PTR_ERR(phydev);
+ break;
+ }
+ }
+
+ if (ret)
+ return -ENODEV;
+ }
+ }
+ }
+
+ if (bp->phy_node) {
+ phydev = of_phy_connect(dev, bp->phy_node,
+ &macb_handle_link_change, 0,
+ bp->phy_interface);
+ if (!phydev)
+ return -ENODEV;
+ } else {
+ phydev = phy_find_first(bp->mii_bus);
+ if (!phydev) {
+ netdev_err(dev, "no PHY found\n");
+ return -ENXIO;
+ }
+
+ if (pdata) {
+ if (gpio_is_valid(pdata->phy_irq_pin)) {
+ ret = devm_gpio_request(&bp->pdev->dev,
+ pdata->phy_irq_pin, "phy int");
+ if (!ret) {
+ phy_irq = gpio_to_irq(pdata->phy_irq_pin);
+ phydev->irq = (phy_irq < 0) ? PHY_POLL : phy_irq;
+ }
+ } else {
+ phydev->irq = PHY_POLL;
+ }
+ }
+
+ /* attach the mac to the phy */
+ ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
+ bp->phy_interface);
+ if (ret) {
+ netdev_err(dev, "Could not attach to PHY\n");
+ return ret;
+ }
+ }
+
+ /* mask with MAC supported features */
+ if (macb_is_gem(bp) && bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
+ phydev->supported &= PHY_GBIT_FEATURES;
+ else
+ phydev->supported &= PHY_BASIC_FEATURES;
+
+ if (bp->caps & MACB_CAPS_NO_GIGABIT_HALF)
+ phydev->supported &= ~SUPPORTED_1000baseT_Half;
+
+ phydev->advertising = phydev->supported;
+
+ bp->link = 0;
+ bp->speed = 0;
+ bp->duplex = -1;
+
+ return 0;
+}
+
+static int macb_mii_init(struct macb *bp)
+{
+ struct macb_platform_data *pdata;
+ struct device_node *np;
+ int err = -ENXIO;
+
+ /* Enable management port */
+ macb_writel(bp, NCR, MACB_BIT(MPE));
+
+ bp->mii_bus = mdiobus_alloc();
+ if (!bp->mii_bus) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ bp->mii_bus->name = "MACB_mii_bus";
+ bp->mii_bus->read = &macb_mdio_read;
+ bp->mii_bus->write = &macb_mdio_write;
+ snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+ bp->pdev->name, bp->pdev->id);
+ bp->mii_bus->priv = bp;
+ bp->mii_bus->parent = &bp->pdev->dev;
+ pdata = dev_get_platdata(&bp->pdev->dev);
+
+ dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
+
+ np = bp->pdev->dev.of_node;
+ if (np && of_phy_is_fixed_link(np)) {
+ if (of_phy_register_fixed_link(np) < 0) {
+ dev_err(&bp->pdev->dev,
+ "broken fixed-link specification %pOF\n", np);
+ goto err_out_free_mdiobus;
+ }
+
+ err = mdiobus_register(bp->mii_bus);
+ } else {
+ if (pdata)
+ bp->mii_bus->phy_mask = pdata->phy_mask;
+
+ err = of_mdiobus_register(bp->mii_bus, np);
+ }
+
+ if (err)
+ goto err_out_free_fixed_link;
+
+ err = macb_mii_probe(bp->dev);
+ if (err)
+ goto err_out_unregister_bus;
+
+ return 0;
+
+err_out_unregister_bus:
+ mdiobus_unregister(bp->mii_bus);
+err_out_free_fixed_link:
+ if (np && of_phy_is_fixed_link(np))
+ of_phy_deregister_fixed_link(np);
+err_out_free_mdiobus:
+ of_node_put(bp->phy_node);
+ mdiobus_free(bp->mii_bus);
+err_out:
+ return err;
+}
+
+static void macb_update_stats(struct macb *bp)
+{
+ u32 *p = &bp->hw_stats.macb.rx_pause_frames;
+ u32 *end = &bp->hw_stats.macb.tx_pause_frames + 1;
+ int offset = MACB_PFR;
+
+ WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
+
+ for (; p < end; p++, offset += 4)
+ *p += bp->macb_reg_readl(bp, offset);
+}
+
+static int macb_halt_tx(struct macb *bp)
+{
+ unsigned long halt_time, timeout;
+ u32 status;
+
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(THALT));
+
+ timeout = jiffies + usecs_to_jiffies(MACB_HALT_TIMEOUT);
+ do {
+ halt_time = jiffies;
+ status = macb_readl(bp, TSR);
+ if (!(status & MACB_BIT(TGO)))
+ return 0;
+
+ udelay(250);
+ } while (time_before(halt_time, timeout));
+
+ return -ETIMEDOUT;
+}
+
+static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb)
+{
+ if (tx_skb->mapping) {
+ if (tx_skb->mapped_as_page)
+ dma_unmap_page(&bp->pdev->dev, tx_skb->mapping,
+ tx_skb->size, DMA_TO_DEVICE);
+ else
+ dma_unmap_single(&bp->pdev->dev, tx_skb->mapping,
+ tx_skb->size, DMA_TO_DEVICE);
+ tx_skb->mapping = 0;
+ }
+
+ if (tx_skb->skb) {
+ dev_kfree_skb_any(tx_skb->skb);
+ tx_skb->skb = NULL;
+ }
+}
+
+static void macb_set_addr(struct macb *bp, struct macb_dma_desc *desc, dma_addr_t addr)
+{
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ struct macb_dma_desc_64 *desc_64;
+
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
+ desc_64 = macb_64b_desc(bp, desc);
+ desc_64->addrh = upper_32_bits(addr);
+ }
+#endif
+ desc->addr = lower_32_bits(addr);
+}
+
+static dma_addr_t macb_get_addr(struct macb *bp, struct macb_dma_desc *desc)
+{
+ dma_addr_t addr = 0;
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ struct macb_dma_desc_64 *desc_64;
+
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
+ desc_64 = macb_64b_desc(bp, desc);
+ addr = ((u64)(desc_64->addrh) << 32);
+ }
+#endif
+ addr |= MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr));
+ return addr;
+}
+
+static void macb_tx_error_task(struct work_struct *work)
+{
+ struct macb_queue *queue = container_of(work, struct macb_queue,
+ tx_error_task);
+ struct macb *bp = queue->bp;
+ struct macb_tx_skb *tx_skb;
+ struct macb_dma_desc *desc;
+ struct sk_buff *skb;
+ unsigned int tail;
+ unsigned long flags;
+
+ netdev_vdbg(bp->dev, "macb_tx_error_task: q = %u, t = %u, h = %u\n",
+ (unsigned int)(queue - bp->queues),
+ queue->tx_tail, queue->tx_head);
+
+ /* Prevent the queue IRQ handlers from running: each of them may call
+ * macb_tx_interrupt(), which in turn may call netif_wake_subqueue().
+ * As explained below, we have to halt the transmission before updating
+ * TBQP registers so we call netif_tx_stop_all_queues() to notify the
+ * network engine about the macb/gem being halted.
+ */
+ spin_lock_irqsave(&bp->lock, flags);
+
+ /* Make sure nobody is trying to queue up new packets */
+ netif_tx_stop_all_queues(bp->dev);
+
+ /* Stop transmission now
+ * (in case we have just queued new packets)
+ * macb/gem must be halted to write TBQP register
+ */
+ if (macb_halt_tx(bp))
+ /* Just complain for now, reinitializing TX path can be good */
+ netdev_err(bp->dev, "BUG: halt tx timed out\n");
+
+ /* Treat frames in TX queue including the ones that caused the error.
+ * Free transmit buffers in upper layer.
+ */
+ for (tail = queue->tx_tail; tail != queue->tx_head; tail++) {
+ u32 ctrl;
+
+ desc = macb_tx_desc(queue, tail);
+ ctrl = desc->ctrl;
+ tx_skb = macb_tx_skb(queue, tail);
+ skb = tx_skb->skb;
+
+ if (ctrl & MACB_BIT(TX_USED)) {
+ /* skb is set for the last buffer of the frame */
+ while (!skb) {
+ macb_tx_unmap(bp, tx_skb);
+ tail++;
+ tx_skb = macb_tx_skb(queue, tail);
+ skb = tx_skb->skb;
+ }
+
+ /* ctrl still refers to the first buffer descriptor
+ * since it's the only one written back by the hardware
+ */
+ if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) {
+ netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n",
+ macb_tx_ring_wrap(bp, tail),
+ skb->data);
+ bp->dev->stats.tx_packets++;
+ queue->stats.tx_packets++;
+ bp->dev->stats.tx_bytes += skb->len;
+ queue->stats.tx_bytes += skb->len;
+ }
+ } else {
+ /* "Buffers exhausted mid-frame" errors may only happen
+ * if the driver is buggy, so complain loudly about
+ * those. Statistics are updated by hardware.
+ */
+ if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED))
+ netdev_err(bp->dev,
+ "BUG: TX buffers exhausted mid-frame\n");
+
+ desc->ctrl = ctrl | MACB_BIT(TX_USED);
+ }
+
+ macb_tx_unmap(bp, tx_skb);
+ }
+
+ /* Set end of TX queue */
+ desc = macb_tx_desc(queue, 0);
+ macb_set_addr(bp, desc, 0);
+ desc->ctrl = MACB_BIT(TX_USED);
+
+ /* Make descriptor updates visible to hardware */
+ wmb();
+
+ /* Reinitialize the TX desc queue */
+ queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma));
+#endif
+ /* Make TX ring reflect state of hardware */
+ queue->tx_head = 0;
+ queue->tx_tail = 0;
+
+ /* Housework before enabling TX IRQ */
+ macb_writel(bp, TSR, macb_readl(bp, TSR));
+ queue_writel(queue, IER, MACB_TX_INT_FLAGS);
+
+ /* Now we are ready to start transmission again */
+ netif_tx_start_all_queues(bp->dev);
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+}
+
+static void macb_tx_interrupt(struct macb_queue *queue)
+{
+ unsigned int tail;
+ unsigned int head;
+ u32 status;
+ struct macb *bp = queue->bp;
+ u16 queue_index = queue - bp->queues;
+
+ status = macb_readl(bp, TSR);
+ macb_writel(bp, TSR, status);
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(TCOMP));
+
+ netdev_vdbg(bp->dev, "macb_tx_interrupt status = 0x%03lx\n",
+ (unsigned long)status);
+
+ head = queue->tx_head;
+ for (tail = queue->tx_tail; tail != head; tail++) {
+ struct macb_tx_skb *tx_skb;
+ struct sk_buff *skb;
+ struct macb_dma_desc *desc;
+ u32 ctrl;
+
+ desc = macb_tx_desc(queue, tail);
+
+ /* Make hw descriptor updates visible to CPU */
+ rmb();
+
+ ctrl = desc->ctrl;
+
+ /* TX_USED bit is only set by hardware on the very first buffer
+ * descriptor of the transmitted frame.
+ */
+ if (!(ctrl & MACB_BIT(TX_USED)))
+ break;
+
+ /* Process all buffers of the current transmitted frame */
+ for (;; tail++) {
+ tx_skb = macb_tx_skb(queue, tail);
+ skb = tx_skb->skb;
+
+ /* First, update TX stats if needed */
+ if (skb) {
+ if (gem_ptp_do_txstamp(queue, skb, desc) == 0) {
+ /* skb now belongs to timestamp buffer
+ * and will be removed later
+ */
+ tx_skb->skb = NULL;
+ }
+ netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n",
+ macb_tx_ring_wrap(bp, tail),
+ skb->data);
+ bp->dev->stats.tx_packets++;
+ queue->stats.tx_packets++;
+ bp->dev->stats.tx_bytes += skb->len;
+ queue->stats.tx_bytes += skb->len;
+ }
+
+ /* Now we can safely release resources */
+ macb_tx_unmap(bp, tx_skb);
+
+ /* skb is set only for the last buffer of the frame.
+ * WARNING: at this point skb has been freed by
+ * macb_tx_unmap().
+ */
+ if (skb)
+ break;
+ }
+ }
+
+ queue->tx_tail = tail;
+ if (__netif_subqueue_stopped(bp->dev, queue_index) &&
+ CIRC_CNT(queue->tx_head, queue->tx_tail,
+ bp->tx_ring_size) <= MACB_TX_WAKEUP_THRESH(bp))
+ netif_wake_subqueue(bp->dev, queue_index);
+}
+
+static void gem_rx_refill(struct macb_queue *queue)
+{
+ unsigned int entry;
+ struct sk_buff *skb;
+ dma_addr_t paddr;
+ struct macb *bp = queue->bp;
+ struct macb_dma_desc *desc;
+
+ while (CIRC_SPACE(queue->rx_prepared_head, queue->rx_tail,
+ bp->rx_ring_size) > 0) {
+ entry = macb_rx_ring_wrap(bp, queue->rx_prepared_head);
+
+ /* Make hw descriptor updates visible to CPU */
+ rmb();
+
+ queue->rx_prepared_head++;
+ desc = macb_rx_desc(queue, entry);
+
+ if (!queue->rx_skbuff[entry]) {
+ /* allocate sk_buff for this free entry in ring */
+ skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size);
+ if (unlikely(!skb)) {
+ netdev_err(bp->dev,
+ "Unable to allocate sk_buff\n");
+ break;
+ }
+
+ /* now fill corresponding descriptor entry */
+ paddr = dma_map_single(&bp->pdev->dev, skb->data,
+ bp->rx_buffer_size,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(&bp->pdev->dev, paddr)) {
+ dev_kfree_skb(skb);
+ break;
+ }
+
+ queue->rx_skbuff[entry] = skb;
+
+ if (entry == bp->rx_ring_size - 1)
+ paddr |= MACB_BIT(RX_WRAP);
+ macb_set_addr(bp, desc, paddr);
+ desc->ctrl = 0;
+
+ /* properly align Ethernet header */
+ skb_reserve(skb, NET_IP_ALIGN);
+ } else {
+ desc->addr &= ~MACB_BIT(RX_USED);
+ desc->ctrl = 0;
+ }
+ }
+
+ /* Make descriptor updates visible to hardware */
+ wmb();
+
+ netdev_vdbg(bp->dev, "rx ring: queue: %p, prepared head %d, tail %d\n",
+ queue, queue->rx_prepared_head, queue->rx_tail);
+}
+
+/* Mark DMA descriptors from begin up to and not including end as unused */
+static void discard_partial_frame(struct macb_queue *queue, unsigned int begin,
+ unsigned int end)
+{
+ unsigned int frag;
+
+ for (frag = begin; frag != end; frag++) {
+ struct macb_dma_desc *desc = macb_rx_desc(queue, frag);
+
+ desc->addr &= ~MACB_BIT(RX_USED);
+ }
+
+ /* Make descriptor updates visible to hardware */
+ wmb();
+
+ /* When this happens, the hardware stats registers for
+ * whatever caused this is updated, so we don't have to record
+ * anything.
+ */
+}
+
+static int gem_rx(struct macb_queue *queue, int budget)
+{
+ struct macb *bp = queue->bp;
+ unsigned int len;
+ unsigned int entry;
+ struct sk_buff *skb;
+ struct macb_dma_desc *desc;
+ int count = 0;
+
+ while (count < budget) {
+ u32 ctrl;
+ dma_addr_t addr;
+ bool rxused;
+
+ entry = macb_rx_ring_wrap(bp, queue->rx_tail);
+ desc = macb_rx_desc(queue, entry);
+
+ /* Make hw descriptor updates visible to CPU */
+ rmb();
+
+ rxused = (desc->addr & MACB_BIT(RX_USED)) ? true : false;
+ addr = macb_get_addr(bp, desc);
+ ctrl = desc->ctrl;
+
+ if (!rxused)
+ break;
+
+ queue->rx_tail++;
+ count++;
+
+ if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) {
+ netdev_err(bp->dev,
+ "not whole frame pointed by descriptor\n");
+ bp->dev->stats.rx_dropped++;
+ queue->stats.rx_dropped++;
+ break;
+ }
+ skb = queue->rx_skbuff[entry];
+ if (unlikely(!skb)) {
+ netdev_err(bp->dev,
+ "inconsistent Rx descriptor chain\n");
+ bp->dev->stats.rx_dropped++;
+ queue->stats.rx_dropped++;
+ break;
+ }
+ /* now everything is ready for receiving packet */
+ queue->rx_skbuff[entry] = NULL;
+ len = ctrl & bp->rx_frm_len_mask;
+
+ netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
+
+ skb_put(skb, len);
+ dma_unmap_single(&bp->pdev->dev, addr,
+ bp->rx_buffer_size, DMA_FROM_DEVICE);
+
+ skb->protocol = eth_type_trans(skb, bp->dev);
+ skb_checksum_none_assert(skb);
+ if (bp->dev->features & NETIF_F_RXCSUM &&
+ !(bp->dev->flags & IFF_PROMISC) &&
+ GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ bp->dev->stats.rx_packets++;
+ queue->stats.rx_packets++;
+ bp->dev->stats.rx_bytes += skb->len;
+ queue->stats.rx_bytes += skb->len;
+
+ gem_ptp_do_rxstamp(bp, skb, desc);
+
+#if defined(DEBUG) && defined(VERBOSE_DEBUG)
+ netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
+ skb->len, skb->csum);
+ print_hex_dump(KERN_DEBUG, " mac: ", DUMP_PREFIX_ADDRESS, 16, 1,
+ skb_mac_header(skb), 16, true);
+ print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_ADDRESS, 16, 1,
+ skb->data, 32, true);
+#endif
+
+ netif_receive_skb(skb);
+ }
+
+ gem_rx_refill(queue);
+
+ return count;
+}
+
+static int macb_rx_frame(struct macb_queue *queue, unsigned int first_frag,
+ unsigned int last_frag)
+{
+ unsigned int len;
+ unsigned int frag;
+ unsigned int offset;
+ struct sk_buff *skb;
+ struct macb_dma_desc *desc;
+ struct macb *bp = queue->bp;
+
+ desc = macb_rx_desc(queue, last_frag);
+ len = desc->ctrl & bp->rx_frm_len_mask;
+
+ netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
+ macb_rx_ring_wrap(bp, first_frag),
+ macb_rx_ring_wrap(bp, last_frag), len);
+
+ /* The ethernet header starts NET_IP_ALIGN bytes into the
+ * first buffer. Since the header is 14 bytes, this makes the
+ * payload word-aligned.
+ *
+ * Instead of calling skb_reserve(NET_IP_ALIGN), we just copy
+ * the two padding bytes into the skb so that we avoid hitting
+ * the slowpath in memcpy(), and pull them off afterwards.
+ */
+ skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN);
+ if (!skb) {
+ bp->dev->stats.rx_dropped++;
+ for (frag = first_frag; ; frag++) {
+ desc = macb_rx_desc(queue, frag);
+ desc->addr &= ~MACB_BIT(RX_USED);
+ if (frag == last_frag)
+ break;
+ }
+
+ /* Make descriptor updates visible to hardware */
+ wmb();
+
+ return 1;
+ }
+
+ offset = 0;
+ len += NET_IP_ALIGN;
+ skb_checksum_none_assert(skb);
+ skb_put(skb, len);
+
+ for (frag = first_frag; ; frag++) {
+ unsigned int frag_len = bp->rx_buffer_size;
+
+ if (offset + frag_len > len) {
+ if (unlikely(frag != last_frag)) {
+ dev_kfree_skb_any(skb);
+ return -1;
+ }
+ frag_len = len - offset;
+ }
+ skb_copy_to_linear_data_offset(skb, offset,
+ macb_rx_buffer(queue, frag),
+ frag_len);
+ offset += bp->rx_buffer_size;
+ desc = macb_rx_desc(queue, frag);
+ desc->addr &= ~MACB_BIT(RX_USED);
+
+ if (frag == last_frag)
+ break;
+ }
+
+ /* Make descriptor updates visible to hardware */
+ wmb();
+
+ __skb_pull(skb, NET_IP_ALIGN);
+ skb->protocol = eth_type_trans(skb, bp->dev);
+
+ bp->dev->stats.rx_packets++;
+ bp->dev->stats.rx_bytes += skb->len;
+ netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
+ skb->len, skb->csum);
+ netif_receive_skb(skb);
+
+ return 0;
+}
+
+static inline void macb_init_rx_ring(struct macb_queue *queue)
+{
+ struct macb *bp = queue->bp;
+ dma_addr_t addr;
+ struct macb_dma_desc *desc = NULL;
+ int i;
+
+ addr = queue->rx_buffers_dma;
+ for (i = 0; i < bp->rx_ring_size; i++) {
+ desc = macb_rx_desc(queue, i);
+ macb_set_addr(bp, desc, addr);
+ desc->ctrl = 0;
+ addr += bp->rx_buffer_size;
+ }
+ desc->addr |= MACB_BIT(RX_WRAP);
+ queue->rx_tail = 0;
+}
+
+static int macb_rx(struct macb_queue *queue, int budget)
+{
+ struct macb *bp = queue->bp;
+ bool reset_rx_queue = false;
+ int received = 0;
+ unsigned int tail;
+ int first_frag = -1;
+
+ for (tail = queue->rx_tail; budget > 0; tail++) {
+ struct macb_dma_desc *desc = macb_rx_desc(queue, tail);
+ u32 ctrl;
+
+ /* Make hw descriptor updates visible to CPU */
+ rmb();
+
+ ctrl = desc->ctrl;
+
+ if (!(desc->addr & MACB_BIT(RX_USED)))
+ break;
+
+ if (ctrl & MACB_BIT(RX_SOF)) {
+ if (first_frag != -1)
+ discard_partial_frame(queue, first_frag, tail);
+ first_frag = tail;
+ }
+
+ if (ctrl & MACB_BIT(RX_EOF)) {
+ int dropped;
+
+ if (unlikely(first_frag == -1)) {
+ reset_rx_queue = true;
+ continue;
+ }
+
+ dropped = macb_rx_frame(queue, first_frag, tail);
+ first_frag = -1;
+ if (unlikely(dropped < 0)) {
+ reset_rx_queue = true;
+ continue;
+ }
+ if (!dropped) {
+ received++;
+ budget--;
+ }
+ }
+ }
+
+ if (unlikely(reset_rx_queue)) {
+ unsigned long flags;
+ u32 ctrl;
+
+ netdev_err(bp->dev, "RX queue corruption: reset it\n");
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ ctrl = macb_readl(bp, NCR);
+ macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
+
+ macb_init_rx_ring(queue);
+ queue_writel(queue, RBQP, queue->rx_ring_dma);
+
+ macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
+
+ spin_unlock_irqrestore(&bp->lock, flags);
+ return received;
+ }
+
+ if (first_frag != -1)
+ queue->rx_tail = first_frag;
+ else
+ queue->rx_tail = tail;
+
+ return received;
+}
+
+static int macb_poll(struct napi_struct *napi, int budget)
+{
+ struct macb_queue *queue = container_of(napi, struct macb_queue, napi);
+ struct macb *bp = queue->bp;
+ int work_done;
+ u32 status;
+
+ status = macb_readl(bp, RSR);
+ macb_writel(bp, RSR, status);
+
+ netdev_vdbg(bp->dev, "poll: status = %08lx, budget = %d\n",
+ (unsigned long)status, budget);
+
+ work_done = bp->macbgem_ops.mog_rx(queue, budget);
+ if (work_done < budget) {
+ napi_complete_done(napi, work_done);
+
+ /* Packets received while interrupts were disabled */
+ status = macb_readl(bp, RSR);
+ if (status) {
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(RCOMP));
+ napi_reschedule(napi);
+ } else {
+ queue_writel(queue, IER, MACB_RX_INT_FLAGS);
+ }
+ }
+
+ /* TODO: Handle errors */
+
+ return work_done;
+}
+
+static void macb_hresp_error_task(unsigned long data)
+{
+ struct macb *bp = (struct macb *)data;
+ struct net_device *dev = bp->dev;
+ struct macb_queue *queue = bp->queues;
+ unsigned int q;
+ u32 ctrl;
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ queue_writel(queue, IDR, MACB_RX_INT_FLAGS |
+ MACB_TX_INT_FLAGS |
+ MACB_BIT(HRESP));
+ }
+ ctrl = macb_readl(bp, NCR);
+ ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
+ macb_writel(bp, NCR, ctrl);
+
+ netif_tx_stop_all_queues(dev);
+ netif_carrier_off(dev);
+
+ bp->macbgem_ops.mog_init_rings(bp);
+
+ /* Initialize TX and RX buffers */
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ queue_writel(queue, RBQPH,
+ upper_32_bits(queue->rx_ring_dma));
+#endif
+ queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ queue_writel(queue, TBQPH,
+ upper_32_bits(queue->tx_ring_dma));
+#endif
+
+ /* Enable interrupts */
+ queue_writel(queue, IER,
+ MACB_RX_INT_FLAGS |
+ MACB_TX_INT_FLAGS |
+ MACB_BIT(HRESP));
+ }
+
+ ctrl |= MACB_BIT(RE) | MACB_BIT(TE);
+ macb_writel(bp, NCR, ctrl);
+
+ netif_carrier_on(dev);
+ netif_tx_start_all_queues(dev);
+}
+
+static irqreturn_t macb_interrupt(int irq, void *dev_id)
+{
+ struct macb_queue *queue = dev_id;
+ struct macb *bp = queue->bp;
+ struct net_device *dev = bp->dev;
+ u32 status, ctrl;
+
+ status = queue_readl(queue, ISR);
+
+ if (unlikely(!status))
+ return IRQ_NONE;
+
+ spin_lock(&bp->lock);
+
+ while (status) {
+ /* close possible race with dev_close */
+ if (unlikely(!netif_running(dev))) {
+ queue_writel(queue, IDR, -1);
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, -1);
+ break;
+ }
+
+ netdev_vdbg(bp->dev, "queue = %u, isr = 0x%08lx\n",
+ (unsigned int)(queue - bp->queues),
+ (unsigned long)status);
+
+ if (status & MACB_RX_INT_FLAGS) {
+ /* There's no point taking any more interrupts
+ * until we have processed the buffers. The
+ * scheduling call may fail if the poll routine
+ * is already scheduled, so disable interrupts
+ * now.
+ */
+ queue_writel(queue, IDR, MACB_RX_INT_FLAGS);
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(RCOMP));
+
+ if (napi_schedule_prep(&queue->napi)) {
+ netdev_vdbg(bp->dev, "scheduling RX softirq\n");
+ __napi_schedule(&queue->napi);
+ }
+ }
+
+ if (unlikely(status & (MACB_TX_ERR_FLAGS))) {
+ queue_writel(queue, IDR, MACB_TX_INT_FLAGS);
+ schedule_work(&queue->tx_error_task);
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_TX_ERR_FLAGS);
+
+ break;
+ }
+
+ if (status & MACB_BIT(TCOMP))
+ macb_tx_interrupt(queue);
+
+ /* Link change detection isn't possible with RMII, so we'll
+ * add that if/when we get our hands on a full-blown MII PHY.
+ */
+
+ /* There is a hardware issue under heavy load where DMA can
+ * stop, this causes endless "used buffer descriptor read"
+ * interrupts but it can be cleared by re-enabling RX. See
+ * the at91 manual, section 41.3.1 or the Zynq manual
+ * section 16.7.4 for details.
+ */
+ if (status & MACB_BIT(RXUBR)) {
+ ctrl = macb_readl(bp, NCR);
+ macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
+ wmb();
+ macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(RXUBR));
+ }
+
+ if (status & MACB_BIT(ISR_ROVR)) {
+ /* We missed at least one packet */
+ if (macb_is_gem(bp))
+ bp->hw_stats.gem.rx_overruns++;
+ else
+ bp->hw_stats.macb.rx_overruns++;
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(ISR_ROVR));
+ }
+
+ if (status & MACB_BIT(HRESP)) {
+ tasklet_schedule(&bp->hresp_err_tasklet);
+ netdev_err(dev, "DMA bus error: HRESP not OK\n");
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(HRESP));
+ }
+ status = queue_readl(queue, ISR);
+ }
+
+ spin_unlock(&bp->lock);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/* Polling receive - used by netconsole and other diagnostic tools
+ * to allow network i/o with interrupts disabled.
+ */
+static void macb_poll_controller(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue;
+ unsigned long flags;
+ unsigned int q;
+
+ local_irq_save(flags);
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
+ macb_interrupt(dev->irq, queue);
+ local_irq_restore(flags);
+}
+#endif
+
+static unsigned int macb_tx_map(struct macb *bp,
+ struct macb_queue *queue,
+ struct sk_buff *skb,
+ unsigned int hdrlen)
+{
+ dma_addr_t mapping;
+ unsigned int len, entry, i, tx_head = queue->tx_head;
+ struct macb_tx_skb *tx_skb = NULL;
+ struct macb_dma_desc *desc;
+ unsigned int offset, size, count = 0;
+ unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags;
+ unsigned int eof = 1, mss_mfs = 0;
+ u32 ctrl, lso_ctrl = 0, seq_ctrl = 0;
+
+ /* LSO */
+ if (skb_shinfo(skb)->gso_size != 0) {
+ if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+ /* UDP - UFO */
+ lso_ctrl = MACB_LSO_UFO_ENABLE;
+ else
+ /* TCP - TSO */
+ lso_ctrl = MACB_LSO_TSO_ENABLE;
+ }
+
+ /* First, map non-paged data */
+ len = skb_headlen(skb);
+
+ /* first buffer length */
+ size = hdrlen;
+
+ offset = 0;
+ while (len) {
+ entry = macb_tx_ring_wrap(bp, tx_head);
+ tx_skb = &queue->tx_skb[entry];
+
+ mapping = dma_map_single(&bp->pdev->dev,
+ skb->data + offset,
+ size, DMA_TO_DEVICE);
+ if (dma_mapping_error(&bp->pdev->dev, mapping))
+ goto dma_error;
+
+ /* Save info to properly release resources */
+ tx_skb->skb = NULL;
+ tx_skb->mapping = mapping;
+ tx_skb->size = size;
+ tx_skb->mapped_as_page = false;
+
+ len -= size;
+ offset += size;
+ count++;
+ tx_head++;
+
+ size = min(len, bp->max_tx_length);
+ }
+
+ /* Then, map paged data from fragments */
+ for (f = 0; f < nr_frags; f++) {
+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
+
+ len = skb_frag_size(frag);
+ offset = 0;
+ while (len) {
+ size = min(len, bp->max_tx_length);
+ entry = macb_tx_ring_wrap(bp, tx_head);
+ tx_skb = &queue->tx_skb[entry];
+
+ mapping = skb_frag_dma_map(&bp->pdev->dev, frag,
+ offset, size, DMA_TO_DEVICE);
+ if (dma_mapping_error(&bp->pdev->dev, mapping))
+ goto dma_error;
+
+ /* Save info to properly release resources */
+ tx_skb->skb = NULL;
+ tx_skb->mapping = mapping;
+ tx_skb->size = size;
+ tx_skb->mapped_as_page = true;
+
+ len -= size;
+ offset += size;
+ count++;
+ tx_head++;
+ }
+ }
+
+ /* Should never happen */
+ if (unlikely(!tx_skb)) {
+ netdev_err(bp->dev, "BUG! empty skb!\n");
+ return 0;
+ }
+
+ /* This is the last buffer of the frame: save socket buffer */
+ tx_skb->skb = skb;
+
+ /* Update TX ring: update buffer descriptors in reverse order
+ * to avoid race condition
+ */
+
+ /* Set 'TX_USED' bit in buffer descriptor at tx_head position
+ * to set the end of TX queue
+ */
+ i = tx_head;
+ entry = macb_tx_ring_wrap(bp, i);
+ ctrl = MACB_BIT(TX_USED);
+ desc = macb_tx_desc(queue, entry);
+ desc->ctrl = ctrl;
+
+ if (lso_ctrl) {
+ if (lso_ctrl == MACB_LSO_UFO_ENABLE)
+ /* include header and FCS in value given to h/w */
+ mss_mfs = skb_shinfo(skb)->gso_size +
+ skb_transport_offset(skb) +
+ ETH_FCS_LEN;
+ else /* TSO */ {
+ mss_mfs = skb_shinfo(skb)->gso_size;
+ /* TCP Sequence Number Source Select
+ * can be set only for TSO
+ */
+ seq_ctrl = 0;
+ }
+ }
+
+ do {
+ i--;
+ entry = macb_tx_ring_wrap(bp, i);
+ tx_skb = &queue->tx_skb[entry];
+ desc = macb_tx_desc(queue, entry);
+
+ ctrl = (u32)tx_skb->size;
+ if (eof) {
+ ctrl |= MACB_BIT(TX_LAST);
+ eof = 0;
+ }
+ if (unlikely(entry == (bp->tx_ring_size - 1)))
+ ctrl |= MACB_BIT(TX_WRAP);
+
+ /* First descriptor is header descriptor */
+ if (i == queue->tx_head) {
+ ctrl |= MACB_BF(TX_LSO, lso_ctrl);
+ ctrl |= MACB_BF(TX_TCP_SEQ_SRC, seq_ctrl);
+ if ((bp->dev->features & NETIF_F_HW_CSUM) &&
+ skb->ip_summed != CHECKSUM_PARTIAL && !lso_ctrl)
+ ctrl |= MACB_BIT(TX_NOCRC);
+ } else
+ /* Only set MSS/MFS on payload descriptors
+ * (second or later descriptor)
+ */
+ ctrl |= MACB_BF(MSS_MFS, mss_mfs);
+
+ /* Set TX buffer descriptor */
+ macb_set_addr(bp, desc, tx_skb->mapping);
+ /* desc->addr must be visible to hardware before clearing
+ * 'TX_USED' bit in desc->ctrl.
+ */
+ wmb();
+ desc->ctrl = ctrl;
+ } while (i != queue->tx_head);
+
+ queue->tx_head = tx_head;
+
+ return count;
+
+dma_error:
+ netdev_err(bp->dev, "TX DMA map failed\n");
+
+ for (i = queue->tx_head; i != tx_head; i++) {
+ tx_skb = macb_tx_skb(queue, i);
+
+ macb_tx_unmap(bp, tx_skb);
+ }
+
+ return 0;
+}
+
+static netdev_features_t macb_features_check(struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ unsigned int nr_frags, f;
+ unsigned int hdrlen;
+
+ /* Validate LSO compatibility */
+
+ /* there is only one buffer */
+ if (!skb_is_nonlinear(skb))
+ return features;
+
+ /* length of header */
+ hdrlen = skb_transport_offset(skb);
+ if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+ hdrlen += tcp_hdrlen(skb);
+
+ /* For LSO:
+ * When software supplies two or more payload buffers all payload buffers
+ * apart from the last must be a multiple of 8 bytes in size.
+ */
+ if (!IS_ALIGNED(skb_headlen(skb) - hdrlen, MACB_TX_LEN_ALIGN))
+ return features & ~MACB_NETIF_LSO;
+
+ nr_frags = skb_shinfo(skb)->nr_frags;
+ /* No need to check last fragment */
+ nr_frags--;
+ for (f = 0; f < nr_frags; f++) {
+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
+
+ if (!IS_ALIGNED(skb_frag_size(frag), MACB_TX_LEN_ALIGN))
+ return features & ~MACB_NETIF_LSO;
+ }
+ return features;
+}
+
+static inline int macb_clear_csum(struct sk_buff *skb)
+{
+ /* no change for packets without checksum offloading */
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ return 0;
+
+ /* make sure we can modify the header */
+ if (unlikely(skb_cow_head(skb, 0)))
+ return -1;
+
+ /* initialize checksum field
+ * This is required - at least for Zynq, which otherwise calculates
+ * wrong UDP header checksums for UDP packets with UDP data len <=2
+ */
+ *(__sum16 *)(skb_checksum_start(skb) + skb->csum_offset) = 0;
+ return 0;
+}
+
+static int macb_pad_and_fcs(struct sk_buff **skb, struct net_device *ndev)
+{
+ bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb);
+ int padlen = ETH_ZLEN - (*skb)->len;
+ int headroom = skb_headroom(*skb);
+ int tailroom = skb_tailroom(*skb);
+ struct sk_buff *nskb;
+ u32 fcs;
+
+ if (!(ndev->features & NETIF_F_HW_CSUM) ||
+ !((*skb)->ip_summed != CHECKSUM_PARTIAL) ||
+ skb_shinfo(*skb)->gso_size) /* Not available for GSO */
+ return 0;
+
+ if (padlen <= 0) {
+ /* FCS could be appeded to tailroom. */
+ if (tailroom >= ETH_FCS_LEN)
+ goto add_fcs;
+ /* FCS could be appeded by moving data to headroom. */
+ else if (!cloned && headroom + tailroom >= ETH_FCS_LEN)
+ padlen = 0;
+ /* No room for FCS, need to reallocate skb. */
+ else
+ padlen = ETH_FCS_LEN - tailroom;
+ } else {
+ /* Add room for FCS. */
+ padlen += ETH_FCS_LEN;
+ }
+
+ if (!cloned && headroom + tailroom >= padlen) {
+ (*skb)->data = memmove((*skb)->head, (*skb)->data, (*skb)->len);
+ skb_set_tail_pointer(*skb, (*skb)->len);
+ } else {
+ nskb = skb_copy_expand(*skb, 0, padlen, GFP_ATOMIC);
+ if (!nskb)
+ return -ENOMEM;
+
+ dev_kfree_skb_any(*skb);
+ *skb = nskb;
+ }
+
+ if (padlen) {
+ if (padlen >= ETH_FCS_LEN)
+ skb_put_zero(*skb, padlen - ETH_FCS_LEN);
+ else
+ skb_trim(*skb, ETH_FCS_LEN - padlen);
+ }
+
+add_fcs:
+ /* set FCS to packet */
+ fcs = crc32_le(~0, (*skb)->data, (*skb)->len);
+ fcs = ~fcs;
+
+ skb_put_u8(*skb, fcs & 0xff);
+ skb_put_u8(*skb, (fcs >> 8) & 0xff);
+ skb_put_u8(*skb, (fcs >> 16) & 0xff);
+ skb_put_u8(*skb, (fcs >> 24) & 0xff);
+
+ return 0;
+}
+
+static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ u16 queue_index = skb_get_queue_mapping(skb);
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue = &bp->queues[queue_index];
+ unsigned long flags;
+ unsigned int desc_cnt, nr_frags, frag_size, f;
+ unsigned int hdrlen;
+ bool is_lso, is_udp = 0;
+ netdev_tx_t ret = NETDEV_TX_OK;
+
+ if (macb_clear_csum(skb)) {
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+
+ if (macb_pad_and_fcs(&skb, dev)) {
+ dev_kfree_skb_any(skb);
+ return ret;
+ }
+
+ is_lso = (skb_shinfo(skb)->gso_size != 0);
+
+ if (is_lso) {
+ is_udp = !!(ip_hdr(skb)->protocol == IPPROTO_UDP);
+
+ /* length of headers */
+ if (is_udp)
+ /* only queue eth + ip headers separately for UDP */
+ hdrlen = skb_transport_offset(skb);
+ else
+ hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ if (skb_headlen(skb) < hdrlen) {
+ netdev_err(bp->dev, "Error - LSO headers fragmented!!!\n");
+ /* if this is required, would need to copy to single buffer */
+ return NETDEV_TX_BUSY;
+ }
+ } else
+ hdrlen = min(skb_headlen(skb), bp->max_tx_length);
+
+#if defined(DEBUG) && defined(VERBOSE_DEBUG)
+ netdev_vdbg(bp->dev,
+ "start_xmit: queue %hu len %u head %p data %p tail %p end %p\n",
+ queue_index, skb->len, skb->head, skb->data,
+ skb_tail_pointer(skb), skb_end_pointer(skb));
+ print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data, 16, true);
+#endif
+
+ /* Count how many TX buffer descriptors are needed to send this
+ * socket buffer: skb fragments of jumbo frames may need to be
+ * split into many buffer descriptors.
+ */
+ if (is_lso && (skb_headlen(skb) > hdrlen))
+ /* extra header descriptor if also payload in first buffer */
+ desc_cnt = DIV_ROUND_UP((skb_headlen(skb) - hdrlen), bp->max_tx_length) + 1;
+ else
+ desc_cnt = DIV_ROUND_UP(skb_headlen(skb), bp->max_tx_length);
+ nr_frags = skb_shinfo(skb)->nr_frags;
+ for (f = 0; f < nr_frags; f++) {
+ frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]);
+ desc_cnt += DIV_ROUND_UP(frag_size, bp->max_tx_length);
+ }
+
+ spin_lock_irqsave(&bp->lock, flags);
+
+ /* This is a hard error, log it. */
+ if (CIRC_SPACE(queue->tx_head, queue->tx_tail,
+ bp->tx_ring_size) < desc_cnt) {
+ netif_stop_subqueue(dev, queue_index);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n",
+ queue->tx_head, queue->tx_tail);
+ return NETDEV_TX_BUSY;
+ }
+
+ /* Map socket buffer for DMA transfer */
+ if (!macb_tx_map(bp, queue, skb, hdrlen)) {
+ dev_kfree_skb_any(skb);
+ goto unlock;
+ }
+
+ /* Make newly initialized descriptor visible to hardware */
+ wmb();
+ skb_tx_timestamp(skb);
+
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
+
+ if (CIRC_SPACE(queue->tx_head, queue->tx_tail, bp->tx_ring_size) < 1)
+ netif_stop_subqueue(dev, queue_index);
+
+unlock:
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ return ret;
+}
+
+static void macb_init_rx_buffer_size(struct macb *bp, size_t size)
+{
+ if (!macb_is_gem(bp)) {
+ bp->rx_buffer_size = MACB_RX_BUFFER_SIZE;
+ } else {
+ bp->rx_buffer_size = size;
+
+ if (bp->rx_buffer_size % RX_BUFFER_MULTIPLE) {
+ netdev_dbg(bp->dev,
+ "RX buffer must be multiple of %d bytes, expanding\n",
+ RX_BUFFER_MULTIPLE);
+ bp->rx_buffer_size =
+ roundup(bp->rx_buffer_size, RX_BUFFER_MULTIPLE);
+ }
+ }
+
+ netdev_dbg(bp->dev, "mtu [%u] rx_buffer_size [%zu]\n",
+ bp->dev->mtu, bp->rx_buffer_size);
+}
+
+static void gem_free_rx_buffers(struct macb *bp)
+{
+ struct sk_buff *skb;
+ struct macb_dma_desc *desc;
+ struct macb_queue *queue;
+ dma_addr_t addr;
+ unsigned int q;
+ int i;
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ if (!queue->rx_skbuff)
+ continue;
+
+ for (i = 0; i < bp->rx_ring_size; i++) {
+ skb = queue->rx_skbuff[i];
+
+ if (!skb)
+ continue;
+
+ desc = macb_rx_desc(queue, i);
+ addr = macb_get_addr(bp, desc);
+
+ dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+ skb = NULL;
+ }
+
+ kfree(queue->rx_skbuff);
+ queue->rx_skbuff = NULL;
+ }
+}
+
+static void macb_free_rx_buffers(struct macb *bp)
+{
+ struct macb_queue *queue = &bp->queues[0];
+
+ if (queue->rx_buffers) {
+ dma_free_coherent(&bp->pdev->dev,
+ bp->rx_ring_size * bp->rx_buffer_size,
+ queue->rx_buffers, queue->rx_buffers_dma);
+ queue->rx_buffers = NULL;
+ }
+}
+
+static void macb_free_consistent(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int q;
+ int size;
+
+ bp->macbgem_ops.mog_free_rx_buffers(bp);
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ kfree(queue->tx_skb);
+ queue->tx_skb = NULL;
+ if (queue->tx_ring) {
+ size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
+ dma_free_coherent(&bp->pdev->dev, size,
+ queue->tx_ring, queue->tx_ring_dma);
+ queue->tx_ring = NULL;
+ }
+ if (queue->rx_ring) {
+ size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
+ dma_free_coherent(&bp->pdev->dev, size,
+ queue->rx_ring, queue->rx_ring_dma);
+ queue->rx_ring = NULL;
+ }
+ }
+}
+
+static int gem_alloc_rx_buffers(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int q;
+ int size;
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ size = bp->rx_ring_size * sizeof(struct sk_buff *);
+ queue->rx_skbuff = kzalloc(size, GFP_KERNEL);
+ if (!queue->rx_skbuff)
+ return -ENOMEM;
+ else
+ netdev_dbg(bp->dev,
+ "Allocated %d RX struct sk_buff entries at %p\n",
+ bp->rx_ring_size, queue->rx_skbuff);
+ }
+ return 0;
+}
+
+static int macb_alloc_rx_buffers(struct macb *bp)
+{
+ struct macb_queue *queue = &bp->queues[0];
+ int size;
+
+ size = bp->rx_ring_size * bp->rx_buffer_size;
+ queue->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
+ &queue->rx_buffers_dma, GFP_KERNEL);
+ if (!queue->rx_buffers)
+ return -ENOMEM;
+
+ netdev_dbg(bp->dev,
+ "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
+ size, (unsigned long)queue->rx_buffers_dma, queue->rx_buffers);
+ return 0;
+}
+
+static int macb_alloc_consistent(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int q;
+ int size;
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
+ queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
+ &queue->tx_ring_dma,
+ GFP_KERNEL);
+ if (!queue->tx_ring)
+ goto out_err;
+ netdev_dbg(bp->dev,
+ "Allocated TX ring for queue %u of %d bytes at %08lx (mapped %p)\n",
+ q, size, (unsigned long)queue->tx_ring_dma,
+ queue->tx_ring);
+
+ size = bp->tx_ring_size * sizeof(struct macb_tx_skb);
+ queue->tx_skb = kmalloc(size, GFP_KERNEL);
+ if (!queue->tx_skb)
+ goto out_err;
+
+ size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
+ queue->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
+ &queue->rx_ring_dma, GFP_KERNEL);
+ if (!queue->rx_ring)
+ goto out_err;
+ netdev_dbg(bp->dev,
+ "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
+ size, (unsigned long)queue->rx_ring_dma, queue->rx_ring);
+ }
+ if (bp->macbgem_ops.mog_alloc_rx_buffers(bp))
+ goto out_err;
+
+ return 0;
+
+out_err:
+ macb_free_consistent(bp);
+ return -ENOMEM;
+}
+
+static void gem_init_rings(struct macb *bp)
+{
+ struct macb_queue *queue;
+ struct macb_dma_desc *desc = NULL;
+ unsigned int q;
+ int i;
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ for (i = 0; i < bp->tx_ring_size; i++) {
+ desc = macb_tx_desc(queue, i);
+ macb_set_addr(bp, desc, 0);
+ desc->ctrl = MACB_BIT(TX_USED);
+ }
+ desc->ctrl |= MACB_BIT(TX_WRAP);
+ queue->tx_head = 0;
+ queue->tx_tail = 0;
+
+ queue->rx_tail = 0;
+ queue->rx_prepared_head = 0;
+
+ gem_rx_refill(queue);
+ }
+
+}
+
+static void macb_init_rings(struct macb *bp)
+{
+ int i;
+ struct macb_dma_desc *desc = NULL;
+
+ macb_init_rx_ring(&bp->queues[0]);
+
+ for (i = 0; i < bp->tx_ring_size; i++) {
+ desc = macb_tx_desc(&bp->queues[0], i);
+ macb_set_addr(bp, desc, 0);
+ desc->ctrl = MACB_BIT(TX_USED);
+ }
+ bp->queues[0].tx_head = 0;
+ bp->queues[0].tx_tail = 0;
+ desc->ctrl |= MACB_BIT(TX_WRAP);
+}
+
+static void macb_reset_hw(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int q;
+ u32 ctrl = macb_readl(bp, NCR);
+
+ /* Disable RX and TX (XXX: Should we halt the transmission
+ * more gracefully?)
+ */
+ ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
+
+ /* Clear the stats registers (XXX: Update stats first?) */
+ ctrl |= MACB_BIT(CLRSTAT);
+
+ macb_writel(bp, NCR, ctrl);
+
+ /* Clear all status flags */
+ macb_writel(bp, TSR, -1);
+ macb_writel(bp, RSR, -1);
+
+ /* Disable all interrupts */
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ queue_writel(queue, IDR, -1);
+ queue_readl(queue, ISR);
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, -1);
+ }
+}
+
+static u32 gem_mdc_clk_div(struct macb *bp)
+{
+ u32 config;
+ unsigned long pclk_hz = clk_get_rate(bp->pclk);
+
+ if (pclk_hz <= 20000000)
+ config = GEM_BF(CLK, GEM_CLK_DIV8);
+ else if (pclk_hz <= 40000000)
+ config = GEM_BF(CLK, GEM_CLK_DIV16);
+ else if (pclk_hz <= 80000000)
+ config = GEM_BF(CLK, GEM_CLK_DIV32);
+ else if (pclk_hz <= 120000000)
+ config = GEM_BF(CLK, GEM_CLK_DIV48);
+ else if (pclk_hz <= 160000000)
+ config = GEM_BF(CLK, GEM_CLK_DIV64);
+ else
+ config = GEM_BF(CLK, GEM_CLK_DIV96);
+
+ return config;
+}
+
+static u32 macb_mdc_clk_div(struct macb *bp)
+{
+ u32 config;
+ unsigned long pclk_hz;
+
+ if (macb_is_gem(bp))
+ return gem_mdc_clk_div(bp);
+
+ pclk_hz = clk_get_rate(bp->pclk);
+ if (pclk_hz <= 20000000)
+ config = MACB_BF(CLK, MACB_CLK_DIV8);
+ else if (pclk_hz <= 40000000)
+ config = MACB_BF(CLK, MACB_CLK_DIV16);
+ else if (pclk_hz <= 80000000)
+ config = MACB_BF(CLK, MACB_CLK_DIV32);
+ else
+ config = MACB_BF(CLK, MACB_CLK_DIV64);
+
+ return config;
+}
+
+/* Get the DMA bus width field of the network configuration register that we
+ * should program. We find the width from decoding the design configuration
+ * register to find the maximum supported data bus width.
+ */
+static u32 macb_dbw(struct macb *bp)
+{
+ if (!macb_is_gem(bp))
+ return 0;
+
+ switch (GEM_BFEXT(DBWDEF, gem_readl(bp, DCFG1))) {
+ case 4:
+ return GEM_BF(DBW, GEM_DBW128);
+ case 2:
+ return GEM_BF(DBW, GEM_DBW64);
+ case 1:
+ default:
+ return GEM_BF(DBW, GEM_DBW32);
+ }
+}
+
+/* Configure the receive DMA engine
+ * - use the correct receive buffer size
+ * - set best burst length for DMA operations
+ * (if not supported by FIFO, it will fallback to default)
+ * - set both rx/tx packet buffers to full memory size
+ * These are configurable parameters for GEM.
+ */
+static void macb_configure_dma(struct macb *bp)
+{
+ struct macb_queue *queue;
+ u32 buffer_size;
+ unsigned int q;
+ u32 dmacfg;
+
+ buffer_size = bp->rx_buffer_size / RX_BUFFER_MULTIPLE;
+ if (macb_is_gem(bp)) {
+ dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L);
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ if (q)
+ queue_writel(queue, RBQS, buffer_size);
+ else
+ dmacfg |= GEM_BF(RXBS, buffer_size);
+ }
+ if (bp->dma_burst_length)
+ dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg);
+ dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L);
+ dmacfg &= ~GEM_BIT(ENDIA_PKT);
+
+ if (bp->native_io)
+ dmacfg &= ~GEM_BIT(ENDIA_DESC);
+ else
+ dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */
+
+ if (bp->dev->features & NETIF_F_HW_CSUM)
+ dmacfg |= GEM_BIT(TXCOEN);
+ else
+ dmacfg &= ~GEM_BIT(TXCOEN);
+
+ dmacfg &= ~GEM_BIT(ADDR64);
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ dmacfg |= GEM_BIT(ADDR64);
+#endif
+#ifdef CONFIG_MACB_USE_HWSTAMP
+ if (bp->hw_dma_cap & HW_DMA_CAP_PTP)
+ dmacfg |= GEM_BIT(RXEXT) | GEM_BIT(TXEXT);
+#endif
+ netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n",
+ dmacfg);
+ gem_writel(bp, DMACFG, dmacfg);
+ }
+}
+
+static void macb_init_hw(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int q;
+
+ u32 config;
+
+ macb_reset_hw(bp);
+ macb_set_hwaddr(bp);
+
+ config = macb_mdc_clk_div(bp);
+ if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII)
+ config |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
+ config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */
+ config |= MACB_BIT(PAE); /* PAuse Enable */
+ config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
+ if (bp->caps & MACB_CAPS_JUMBO)
+ config |= MACB_BIT(JFRAME); /* Enable jumbo frames */
+ else
+ config |= MACB_BIT(BIG); /* Receive oversized frames */
+ if (bp->dev->flags & IFF_PROMISC)
+ config |= MACB_BIT(CAF); /* Copy All Frames */
+ else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
+ config |= GEM_BIT(RXCOEN);
+ if (!(bp->dev->flags & IFF_BROADCAST))
+ config |= MACB_BIT(NBC); /* No BroadCast */
+ config |= macb_dbw(bp);
+ macb_writel(bp, NCFGR, config);
+ if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len)
+ gem_writel(bp, JML, bp->jumbo_max_len);
+ bp->speed = SPEED_10;
+ bp->duplex = DUPLEX_HALF;
+ bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
+ if (bp->caps & MACB_CAPS_JUMBO)
+ bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
+
+ macb_configure_dma(bp);
+
+ /* Initialize TX and RX buffers */
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ queue_writel(queue, RBQPH, upper_32_bits(queue->rx_ring_dma));
+#endif
+ queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B)
+ queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma));
+#endif
+
+ /* Enable interrupts */
+ queue_writel(queue, IER,
+ MACB_RX_INT_FLAGS |
+ MACB_TX_INT_FLAGS |
+ MACB_BIT(HRESP));
+ }
+
+ /* Enable TX and RX */
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
+}
+
+/* The hash address register is 64 bits long and takes up two
+ * locations in the memory map. The least significant bits are stored
+ * in EMAC_HSL and the most significant bits in EMAC_HSH.
+ *
+ * The unicast hash enable and the multicast hash enable bits in the
+ * network configuration register enable the reception of hash matched
+ * frames. The destination address is reduced to a 6 bit index into
+ * the 64 bit hash register using the following hash function. The
+ * hash function is an exclusive or of every sixth bit of the
+ * destination address.
+ *
+ * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
+ * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
+ * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
+ * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
+ * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
+ * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
+ *
+ * da[0] represents the least significant bit of the first byte
+ * received, that is, the multicast/unicast indicator, and da[47]
+ * represents the most significant bit of the last byte received. If
+ * the hash index, hi[n], points to a bit that is set in the hash
+ * register then the frame will be matched according to whether the
+ * frame is multicast or unicast. A multicast match will be signalled
+ * if the multicast hash enable bit is set, da[0] is 1 and the hash
+ * index points to a bit set in the hash register. A unicast match
+ * will be signalled if the unicast hash enable bit is set, da[0] is 0
+ * and the hash index points to a bit set in the hash register. To
+ * receive all multicast frames, the hash register should be set with
+ * all ones and the multicast hash enable bit should be set in the
+ * network configuration register.
+ */
+
+static inline int hash_bit_value(int bitnr, __u8 *addr)
+{
+ if (addr[bitnr / 8] & (1 << (bitnr % 8)))
+ return 1;
+ return 0;
+}
+
+/* Return the hash index value for the specified address. */
+static int hash_get_index(__u8 *addr)
+{
+ int i, j, bitval;
+ int hash_index = 0;
+
+ for (j = 0; j < 6; j++) {
+ for (i = 0, bitval = 0; i < 8; i++)
+ bitval ^= hash_bit_value(i * 6 + j, addr);
+
+ hash_index |= (bitval << j);
+ }
+
+ return hash_index;
+}
+
+/* Add multicast addresses to the internal multicast-hash table. */
+static void macb_sethashtable(struct net_device *dev)
+{
+ struct netdev_hw_addr *ha;
+ unsigned long mc_filter[2];
+ unsigned int bitnr;
+ struct macb *bp = netdev_priv(dev);
+
+ mc_filter[0] = 0;
+ mc_filter[1] = 0;
+
+ netdev_for_each_mc_addr(ha, dev) {
+ bitnr = hash_get_index(ha->addr);
+ mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
+ }
+
+ macb_or_gem_writel(bp, HRB, mc_filter[0]);
+ macb_or_gem_writel(bp, HRT, mc_filter[1]);
+}
+
+/* Enable/Disable promiscuous and multicast modes. */
+static void macb_set_rx_mode(struct net_device *dev)
+{
+ unsigned long cfg;
+ struct macb *bp = netdev_priv(dev);
+
+ cfg = macb_readl(bp, NCFGR);
+
+ if (dev->flags & IFF_PROMISC) {
+ /* Enable promiscuous mode */
+ cfg |= MACB_BIT(CAF);
+
+ /* Disable RX checksum offload */
+ if (macb_is_gem(bp))
+ cfg &= ~GEM_BIT(RXCOEN);
+ } else {
+ /* Disable promiscuous mode */
+ cfg &= ~MACB_BIT(CAF);
+
+ /* Enable RX checksum offload only if requested */
+ if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM)
+ cfg |= GEM_BIT(RXCOEN);
+ }
+
+ if (dev->flags & IFF_ALLMULTI) {
+ /* Enable all multicast mode */
+ macb_or_gem_writel(bp, HRB, -1);
+ macb_or_gem_writel(bp, HRT, -1);
+ cfg |= MACB_BIT(NCFGR_MTI);
+ } else if (!netdev_mc_empty(dev)) {
+ /* Enable specific multicasts */
+ macb_sethashtable(dev);
+ cfg |= MACB_BIT(NCFGR_MTI);
+ } else if (dev->flags & (~IFF_ALLMULTI)) {
+ /* Disable all multicast mode */
+ macb_or_gem_writel(bp, HRB, 0);
+ macb_or_gem_writel(bp, HRT, 0);
+ cfg &= ~MACB_BIT(NCFGR_MTI);
+ }
+
+ macb_writel(bp, NCFGR, cfg);
+}
+
+static int macb_open(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN;
+ struct macb_queue *queue;
+ unsigned int q;
+ int err;
+
+ netdev_dbg(bp->dev, "open\n");
+
+ /* carrier starts down */
+ netif_carrier_off(dev);
+
+ /* if the phy is not yet register, retry later*/
+ if (!dev->phydev)
+ return -EAGAIN;
+
+ /* RX buffers initialization */
+ macb_init_rx_buffer_size(bp, bufsz);
+
+ err = macb_alloc_consistent(bp);
+ if (err) {
+ netdev_err(dev, "Unable to allocate DMA memory (error %d)\n",
+ err);
+ return err;
+ }
+
+ bp->macbgem_ops.mog_init_rings(bp);
+ macb_init_hw(bp);
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
+ napi_enable(&queue->napi);
+
+ /* schedule a link state check */
+ phy_start(dev->phydev);
+
+ netif_tx_start_all_queues(dev);
+
+ if (bp->ptp_info)
+ bp->ptp_info->ptp_init(dev);
+
+ return 0;
+}
+
+static int macb_close(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue;
+ unsigned long flags;
+ unsigned int q;
+
+ netif_tx_stop_all_queues(dev);
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
+ napi_disable(&queue->napi);
+
+ if (dev->phydev)
+ phy_stop(dev->phydev);
+
+ spin_lock_irqsave(&bp->lock, flags);
+ macb_reset_hw(bp);
+ netif_carrier_off(dev);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ macb_free_consistent(bp);
+
+ if (bp->ptp_info)
+ bp->ptp_info->ptp_remove(dev);
+
+ return 0;
+}
+
+static int macb_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if (netif_running(dev))
+ return -EBUSY;
+
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+
+static void gem_update_stats(struct macb *bp)
+{
+ struct macb_queue *queue;
+ unsigned int i, q, idx;
+ unsigned long *stat;
+
+ u32 *p = &bp->hw_stats.gem.tx_octets_31_0;
+
+ for (i = 0; i < GEM_STATS_LEN; ++i, ++p) {
+ u32 offset = gem_statistics[i].offset;
+ u64 val = bp->macb_reg_readl(bp, offset);
+
+ bp->ethtool_stats[i] += val;
+ *p += val;
+
+ if (offset == GEM_OCTTXL || offset == GEM_OCTRXL) {
+ /* Add GEM_OCTTXH, GEM_OCTRXH */
+ val = bp->macb_reg_readl(bp, offset + 4);
+ bp->ethtool_stats[i] += ((u64)val) << 32;
+ *(++p) += val;
+ }
+ }
+
+ idx = GEM_STATS_LEN;
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
+ for (i = 0, stat = &queue->stats.first; i < QUEUE_STATS_LEN; ++i, ++stat)
+ bp->ethtool_stats[idx++] = *stat;
+}
+
+static struct net_device_stats *gem_get_stats(struct macb *bp)
+{
+ struct gem_stats *hwstat = &bp->hw_stats.gem;
+ struct net_device_stats *nstat = &bp->dev->stats;
+
+ gem_update_stats(bp);
+
+ nstat->rx_errors = (hwstat->rx_frame_check_sequence_errors +
+ hwstat->rx_alignment_errors +
+ hwstat->rx_resource_errors +
+ hwstat->rx_overruns +
+ hwstat->rx_oversize_frames +
+ hwstat->rx_jabbers +
+ hwstat->rx_undersized_frames +
+ hwstat->rx_length_field_frame_errors);
+ nstat->tx_errors = (hwstat->tx_late_collisions +
+ hwstat->tx_excessive_collisions +
+ hwstat->tx_underrun +
+ hwstat->tx_carrier_sense_errors);
+ nstat->multicast = hwstat->rx_multicast_frames;
+ nstat->collisions = (hwstat->tx_single_collision_frames +
+ hwstat->tx_multiple_collision_frames +
+ hwstat->tx_excessive_collisions);
+ nstat->rx_length_errors = (hwstat->rx_oversize_frames +
+ hwstat->rx_jabbers +
+ hwstat->rx_undersized_frames +
+ hwstat->rx_length_field_frame_errors);
+ nstat->rx_over_errors = hwstat->rx_resource_errors;
+ nstat->rx_crc_errors = hwstat->rx_frame_check_sequence_errors;
+ nstat->rx_frame_errors = hwstat->rx_alignment_errors;
+ nstat->rx_fifo_errors = hwstat->rx_overruns;
+ nstat->tx_aborted_errors = hwstat->tx_excessive_collisions;
+ nstat->tx_carrier_errors = hwstat->tx_carrier_sense_errors;
+ nstat->tx_fifo_errors = hwstat->tx_underrun;
+
+ return nstat;
+}
+
+static void gem_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct macb *bp;
+
+ bp = netdev_priv(dev);
+ gem_update_stats(bp);
+ memcpy(data, &bp->ethtool_stats, sizeof(u64)
+ * (GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES));
+}
+
+static int gem_get_sset_count(struct net_device *dev, int sset)
+{
+ struct macb *bp = netdev_priv(dev);
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return GEM_STATS_LEN + bp->num_queues * QUEUE_STATS_LEN;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p)
+{
+ char stat_string[ETH_GSTRING_LEN];
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue;
+ unsigned int i;
+ unsigned int q;
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ for (i = 0; i < GEM_STATS_LEN; i++, p += ETH_GSTRING_LEN)
+ memcpy(p, gem_statistics[i].stat_string,
+ ETH_GSTRING_LEN);
+
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ for (i = 0; i < QUEUE_STATS_LEN; i++, p += ETH_GSTRING_LEN) {
+ snprintf(stat_string, ETH_GSTRING_LEN, "q%d_%s",
+ q, queue_statistics[i].stat_string);
+ memcpy(p, stat_string, ETH_GSTRING_LEN);
+ }
+ }
+ break;
+ }
+}
+
+static struct net_device_stats *macb_get_stats(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct net_device_stats *nstat = &bp->dev->stats;
+ struct macb_stats *hwstat = &bp->hw_stats.macb;
+
+ if (macb_is_gem(bp))
+ return gem_get_stats(bp);
+
+ /* read stats from hardware */
+ macb_update_stats(bp);
+
+ /* Convert HW stats into netdevice stats */
+ nstat->rx_errors = (hwstat->rx_fcs_errors +
+ hwstat->rx_align_errors +
+ hwstat->rx_resource_errors +
+ hwstat->rx_overruns +
+ hwstat->rx_oversize_pkts +
+ hwstat->rx_jabbers +
+ hwstat->rx_undersize_pkts +
+ hwstat->rx_length_mismatch);
+ nstat->tx_errors = (hwstat->tx_late_cols +
+ hwstat->tx_excessive_cols +
+ hwstat->tx_underruns +
+ hwstat->tx_carrier_errors +
+ hwstat->sqe_test_errors);
+ nstat->collisions = (hwstat->tx_single_cols +
+ hwstat->tx_multiple_cols +
+ hwstat->tx_excessive_cols);
+ nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
+ hwstat->rx_jabbers +
+ hwstat->rx_undersize_pkts +
+ hwstat->rx_length_mismatch);
+ nstat->rx_over_errors = hwstat->rx_resource_errors +
+ hwstat->rx_overruns;
+ nstat->rx_crc_errors = hwstat->rx_fcs_errors;
+ nstat->rx_frame_errors = hwstat->rx_align_errors;
+ nstat->rx_fifo_errors = hwstat->rx_overruns;
+ /* XXX: What does "missed" mean? */
+ nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
+ nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
+ nstat->tx_fifo_errors = hwstat->tx_underruns;
+ /* Don't know about heartbeat or window errors... */
+
+ return nstat;
+}
+
+static int macb_get_regs_len(struct net_device *netdev)
+{
+ return MACB_GREGS_NBR * sizeof(u32);
+}
+
+static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs,
+ void *p)
+{
+ struct macb *bp = netdev_priv(dev);
+ unsigned int tail, head;
+ u32 *regs_buff = p;
+
+ regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1))
+ | MACB_GREGS_VERSION;
+
+ tail = macb_tx_ring_wrap(bp, bp->queues[0].tx_tail);
+ head = macb_tx_ring_wrap(bp, bp->queues[0].tx_head);
+
+ regs_buff[0] = macb_readl(bp, NCR);
+ regs_buff[1] = macb_or_gem_readl(bp, NCFGR);
+ regs_buff[2] = macb_readl(bp, NSR);
+ regs_buff[3] = macb_readl(bp, TSR);
+ regs_buff[4] = macb_readl(bp, RBQP);
+ regs_buff[5] = macb_readl(bp, TBQP);
+ regs_buff[6] = macb_readl(bp, RSR);
+ regs_buff[7] = macb_readl(bp, IMR);
+
+ regs_buff[8] = tail;
+ regs_buff[9] = head;
+ regs_buff[10] = macb_tx_dma(&bp->queues[0], tail);
+ regs_buff[11] = macb_tx_dma(&bp->queues[0], head);
+
+ if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
+ regs_buff[12] = macb_or_gem_readl(bp, USRIO);
+ if (macb_is_gem(bp))
+ regs_buff[13] = gem_readl(bp, DMACFG);
+}
+
+static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ wol->supported = 0;
+ wol->wolopts = 0;
+
+ if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) {
+ wol->supported = WAKE_MAGIC;
+
+ if (bp->wol & MACB_WOL_ENABLED)
+ wol->wolopts |= WAKE_MAGIC;
+ }
+}
+
+static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ if (!(bp->wol & MACB_WOL_HAS_MAGIC_PACKET) ||
+ (wol->wolopts & ~WAKE_MAGIC))
+ return -EOPNOTSUPP;
+
+ if (wol->wolopts & WAKE_MAGIC)
+ bp->wol |= MACB_WOL_ENABLED;
+ else
+ bp->wol &= ~MACB_WOL_ENABLED;
+
+ device_set_wakeup_enable(&bp->pdev->dev, bp->wol & MACB_WOL_ENABLED);
+
+ return 0;
+}
+
+static void macb_get_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ ring->rx_max_pending = MAX_RX_RING_SIZE;
+ ring->tx_max_pending = MAX_TX_RING_SIZE;
+
+ ring->rx_pending = bp->rx_ring_size;
+ ring->tx_pending = bp->tx_ring_size;
+}
+
+static int macb_set_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct macb *bp = netdev_priv(netdev);
+ u32 new_rx_size, new_tx_size;
+ unsigned int reset = 0;
+
+ if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
+ return -EINVAL;
+
+ new_rx_size = clamp_t(u32, ring->rx_pending,
+ MIN_RX_RING_SIZE, MAX_RX_RING_SIZE);
+ new_rx_size = roundup_pow_of_two(new_rx_size);
+
+ new_tx_size = clamp_t(u32, ring->tx_pending,
+ MIN_TX_RING_SIZE, MAX_TX_RING_SIZE);
+ new_tx_size = roundup_pow_of_two(new_tx_size);
+
+ if ((new_tx_size == bp->tx_ring_size) &&
+ (new_rx_size == bp->rx_ring_size)) {
+ /* nothing to do */
+ return 0;
+ }
+
+ if (netif_running(bp->dev)) {
+ reset = 1;
+ macb_close(bp->dev);
+ }
+
+ bp->rx_ring_size = new_rx_size;
+ bp->tx_ring_size = new_tx_size;
+
+ if (reset)
+ macb_open(bp->dev);
+
+ return 0;
+}
+
+#ifdef CONFIG_MACB_USE_HWSTAMP
+static unsigned int gem_get_tsu_rate(struct macb *bp)
+{
+ struct clk *tsu_clk;
+ unsigned int tsu_rate;
+
+ tsu_clk = devm_clk_get(&bp->pdev->dev, "tsu_clk");
+ if (!IS_ERR(tsu_clk))
+ tsu_rate = clk_get_rate(tsu_clk);
+ /* try pclk instead */
+ else if (!IS_ERR(bp->pclk)) {
+ tsu_clk = bp->pclk;
+ tsu_rate = clk_get_rate(tsu_clk);
+ } else
+ return -ENOTSUPP;
+ return tsu_rate;
+}
+
+static s32 gem_get_ptp_max_adj(void)
+{
+ return 64000000;
+}
+
+static int gem_get_ts_info(struct net_device *dev,
+ struct ethtool_ts_info *info)
+{
+ struct macb *bp = netdev_priv(dev);
+
+ if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0) {
+ ethtool_op_get_ts_info(dev, info);
+ return 0;
+ }
+
+ 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_ONESTEP_SYNC) |
+ (1 << HWTSTAMP_TX_OFF) |
+ (1 << HWTSTAMP_TX_ON);
+ info->rx_filters =
+ (1 << HWTSTAMP_FILTER_NONE) |
+ (1 << HWTSTAMP_FILTER_ALL);
+
+ info->phc_index = bp->ptp_clock ? ptp_clock_index(bp->ptp_clock) : -1;
+
+ return 0;
+}
+
+static struct macb_ptp_info gem_ptp_info = {
+ .ptp_init = gem_ptp_init,
+ .ptp_remove = gem_ptp_remove,
+ .get_ptp_max_adj = gem_get_ptp_max_adj,
+ .get_tsu_rate = gem_get_tsu_rate,
+ .get_ts_info = gem_get_ts_info,
+ .get_hwtst = gem_get_hwtst,
+ .set_hwtst = gem_set_hwtst,
+};
+#endif
+
+static int macb_get_ts_info(struct net_device *netdev,
+ struct ethtool_ts_info *info)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ if (bp->ptp_info)
+ return bp->ptp_info->get_ts_info(netdev, info);
+
+ return ethtool_op_get_ts_info(netdev, info);
+}
+
+static void gem_enable_flow_filters(struct macb *bp, bool enable)
+{
+ struct ethtool_rx_fs_item *item;
+ u32 t2_scr;
+ int num_t2_scr;
+
+ num_t2_scr = GEM_BFEXT(T2SCR, gem_readl(bp, DCFG8));
+
+ list_for_each_entry(item, &bp->rx_fs_list.list, list) {
+ struct ethtool_rx_flow_spec *fs = &item->fs;
+ struct ethtool_tcpip4_spec *tp4sp_m;
+
+ if (fs->location >= num_t2_scr)
+ continue;
+
+ t2_scr = gem_readl_n(bp, SCRT2, fs->location);
+
+ /* enable/disable screener regs for the flow entry */
+ t2_scr = GEM_BFINS(ETHTEN, enable, t2_scr);
+
+ /* only enable fields with no masking */
+ tp4sp_m = &(fs->m_u.tcp_ip4_spec);
+
+ if (enable && (tp4sp_m->ip4src == 0xFFFFFFFF))
+ t2_scr = GEM_BFINS(CMPAEN, 1, t2_scr);
+ else
+ t2_scr = GEM_BFINS(CMPAEN, 0, t2_scr);
+
+ if (enable && (tp4sp_m->ip4dst == 0xFFFFFFFF))
+ t2_scr = GEM_BFINS(CMPBEN, 1, t2_scr);
+ else
+ t2_scr = GEM_BFINS(CMPBEN, 0, t2_scr);
+
+ if (enable && ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)))
+ t2_scr = GEM_BFINS(CMPCEN, 1, t2_scr);
+ else
+ t2_scr = GEM_BFINS(CMPCEN, 0, t2_scr);
+
+ gem_writel_n(bp, SCRT2, fs->location, t2_scr);
+ }
+}
+
+static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs)
+{
+ struct ethtool_tcpip4_spec *tp4sp_v, *tp4sp_m;
+ uint16_t index = fs->location;
+ u32 w0, w1, t2_scr;
+ bool cmp_a = false;
+ bool cmp_b = false;
+ bool cmp_c = false;
+
+ tp4sp_v = &(fs->h_u.tcp_ip4_spec);
+ tp4sp_m = &(fs->m_u.tcp_ip4_spec);
+
+ /* ignore field if any masking set */
+ if (tp4sp_m->ip4src == 0xFFFFFFFF) {
+ /* 1st compare reg - IP source address */
+ w0 = 0;
+ w1 = 0;
+ w0 = tp4sp_v->ip4src;
+ w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
+ w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
+ w1 = GEM_BFINS(T2OFST, ETYPE_SRCIP_OFFSET, w1);
+ gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w0);
+ gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w1);
+ cmp_a = true;
+ }
+
+ /* ignore field if any masking set */
+ if (tp4sp_m->ip4dst == 0xFFFFFFFF) {
+ /* 2nd compare reg - IP destination address */
+ w0 = 0;
+ w1 = 0;
+ w0 = tp4sp_v->ip4dst;
+ w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
+ w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
+ w1 = GEM_BFINS(T2OFST, ETYPE_DSTIP_OFFSET, w1);
+ gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4DST_CMP(index)), w0);
+ gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4DST_CMP(index)), w1);
+ cmp_b = true;
+ }
+
+ /* ignore both port fields if masking set in both */
+ if ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)) {
+ /* 3rd compare reg - source port, destination port */
+ w0 = 0;
+ w1 = 0;
+ w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_IPHDR, w1);
+ if (tp4sp_m->psrc == tp4sp_m->pdst) {
+ w0 = GEM_BFINS(T2MASK, tp4sp_v->psrc, w0);
+ w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
+ w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
+ w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
+ } else {
+ /* only one port definition */
+ w1 = GEM_BFINS(T2DISMSK, 0, w1); /* 16-bit compare */
+ w0 = GEM_BFINS(T2MASK, 0xFFFF, w0);
+ if (tp4sp_m->psrc == 0xFFFF) { /* src port */
+ w0 = GEM_BFINS(T2CMP, tp4sp_v->psrc, w0);
+ w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
+ } else { /* dst port */
+ w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
+ w1 = GEM_BFINS(T2OFST, IPHDR_DSTPORT_OFFSET, w1);
+ }
+ }
+ gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_PORT_CMP(index)), w0);
+ gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_PORT_CMP(index)), w1);
+ cmp_c = true;
+ }
+
+ t2_scr = 0;
+ t2_scr = GEM_BFINS(QUEUE, (fs->ring_cookie) & 0xFF, t2_scr);
+ t2_scr = GEM_BFINS(ETHT2IDX, SCRT2_ETHT, t2_scr);
+ if (cmp_a)
+ t2_scr = GEM_BFINS(CMPA, GEM_IP4SRC_CMP(index), t2_scr);
+ if (cmp_b)
+ t2_scr = GEM_BFINS(CMPB, GEM_IP4DST_CMP(index), t2_scr);
+ if (cmp_c)
+ t2_scr = GEM_BFINS(CMPC, GEM_PORT_CMP(index), t2_scr);
+ gem_writel_n(bp, SCRT2, index, t2_scr);
+}
+
+static int gem_add_flow_filter(struct net_device *netdev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+ struct ethtool_rx_flow_spec *fs = &cmd->fs;
+ struct ethtool_rx_fs_item *item, *newfs;
+ unsigned long flags;
+ int ret = -EINVAL;
+ bool added = false;
+
+ newfs = kmalloc(sizeof(*newfs), GFP_KERNEL);
+ if (newfs == NULL)
+ return -ENOMEM;
+ memcpy(&newfs->fs, fs, sizeof(newfs->fs));
+
+ netdev_dbg(netdev,
+ "Adding flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
+ fs->flow_type, (int)fs->ring_cookie, fs->location,
+ htonl(fs->h_u.tcp_ip4_spec.ip4src),
+ htonl(fs->h_u.tcp_ip4_spec.ip4dst),
+ htons(fs->h_u.tcp_ip4_spec.psrc), htons(fs->h_u.tcp_ip4_spec.pdst));
+
+ spin_lock_irqsave(&bp->rx_fs_lock, flags);
+
+ /* find correct place to add in list */
+ list_for_each_entry(item, &bp->rx_fs_list.list, list) {
+ if (item->fs.location > newfs->fs.location) {
+ list_add_tail(&newfs->list, &item->list);
+ added = true;
+ break;
+ } else if (item->fs.location == fs->location) {
+ netdev_err(netdev, "Rule not added: location %d not free!\n",
+ fs->location);
+ ret = -EBUSY;
+ goto err;
+ }
+ }
+ if (!added)
+ list_add_tail(&newfs->list, &bp->rx_fs_list.list);
+
+ gem_prog_cmp_regs(bp, fs);
+ bp->rx_fs_list.count++;
+ /* enable filtering if NTUPLE on */
+ if (netdev->features & NETIF_F_NTUPLE)
+ gem_enable_flow_filters(bp, 1);
+
+ spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
+ return 0;
+
+err:
+ spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
+ kfree(newfs);
+ return ret;
+}
+
+static int gem_del_flow_filter(struct net_device *netdev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+ struct ethtool_rx_fs_item *item;
+ struct ethtool_rx_flow_spec *fs;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bp->rx_fs_lock, flags);
+
+ list_for_each_entry(item, &bp->rx_fs_list.list, list) {
+ if (item->fs.location == cmd->fs.location) {
+ /* disable screener regs for the flow entry */
+ fs = &(item->fs);
+ netdev_dbg(netdev,
+ "Deleting flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
+ fs->flow_type, (int)fs->ring_cookie, fs->location,
+ htonl(fs->h_u.tcp_ip4_spec.ip4src),
+ htonl(fs->h_u.tcp_ip4_spec.ip4dst),
+ htons(fs->h_u.tcp_ip4_spec.psrc),
+ htons(fs->h_u.tcp_ip4_spec.pdst));
+
+ gem_writel_n(bp, SCRT2, fs->location, 0);
+
+ list_del(&item->list);
+ bp->rx_fs_list.count--;
+ spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
+ kfree(item);
+ return 0;
+ }
+ }
+
+ spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
+ return -EINVAL;
+}
+
+static int gem_get_flow_entry(struct net_device *netdev,
+ struct ethtool_rxnfc *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+ struct ethtool_rx_fs_item *item;
+
+ list_for_each_entry(item, &bp->rx_fs_list.list, list) {
+ if (item->fs.location == cmd->fs.location) {
+ memcpy(&cmd->fs, &item->fs, sizeof(cmd->fs));
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int gem_get_all_flow_entries(struct net_device *netdev,
+ struct ethtool_rxnfc *cmd, u32 *rule_locs)
+{
+ struct macb *bp = netdev_priv(netdev);
+ struct ethtool_rx_fs_item *item;
+ uint32_t cnt = 0;
+
+ list_for_each_entry(item, &bp->rx_fs_list.list, list) {
+ if (cnt == cmd->rule_cnt)
+ return -EMSGSIZE;
+ rule_locs[cnt] = item->fs.location;
+ cnt++;
+ }
+ cmd->data = bp->max_tuples;
+ cmd->rule_cnt = cnt;
+
+ return 0;
+}
+
+static int gem_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
+ u32 *rule_locs)
+{
+ struct macb *bp = netdev_priv(netdev);
+ int ret = 0;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_GRXRINGS:
+ cmd->data = bp->num_queues;
+ break;
+ case ETHTOOL_GRXCLSRLCNT:
+ cmd->rule_cnt = bp->rx_fs_list.count;
+ break;
+ case ETHTOOL_GRXCLSRULE:
+ ret = gem_get_flow_entry(netdev, cmd);
+ break;
+ case ETHTOOL_GRXCLSRLALL:
+ ret = gem_get_all_flow_entries(netdev, cmd, rule_locs);
+ break;
+ default:
+ netdev_err(netdev,
+ "Command parameter %d is not supported\n", cmd->cmd);
+ ret = -EOPNOTSUPP;
+ }
+
+ return ret;
+}
+
+static int gem_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+ int ret;
+
+ switch (cmd->cmd) {
+ case ETHTOOL_SRXCLSRLINS:
+ if ((cmd->fs.location >= bp->max_tuples)
+ || (cmd->fs.ring_cookie >= bp->num_queues)) {
+ ret = -EINVAL;
+ break;
+ }
+ ret = gem_add_flow_filter(netdev, cmd);
+ break;
+ case ETHTOOL_SRXCLSRLDEL:
+ ret = gem_del_flow_filter(netdev, cmd);
+ break;
+ default:
+ netdev_err(netdev,
+ "Command parameter %d is not supported\n", cmd->cmd);
+ ret = -EOPNOTSUPP;
+ }
+
+ return ret;
+}
+
+static const struct ethtool_ops macb_ethtool_ops = {
+ .get_regs_len = macb_get_regs_len,
+ .get_regs = macb_get_regs,
+ .get_link = ethtool_op_get_link,
+ .get_ts_info = ethtool_op_get_ts_info,
+ .get_wol = macb_get_wol,
+ .set_wol = macb_set_wol,
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_ringparam = macb_get_ringparam,
+ .set_ringparam = macb_set_ringparam,
+};
+
+static const struct ethtool_ops gem_ethtool_ops = {
+ .get_regs_len = macb_get_regs_len,
+ .get_regs = macb_get_regs,
+ .get_link = ethtool_op_get_link,
+ .get_ts_info = macb_get_ts_info,
+ .get_ethtool_stats = gem_get_ethtool_stats,
+ .get_strings = gem_get_ethtool_strings,
+ .get_sset_count = gem_get_sset_count,
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_ringparam = macb_get_ringparam,
+ .set_ringparam = macb_set_ringparam,
+ .get_rxnfc = gem_get_rxnfc,
+ .set_rxnfc = gem_set_rxnfc,
+};
+
+static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct phy_device *phydev = dev->phydev;
+ struct macb *bp = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!phydev)
+ return -ENODEV;
+
+ if (!bp->ptp_info)
+ return phy_mii_ioctl(phydev, rq, cmd);
+
+ switch (cmd) {
+ case SIOCSHWTSTAMP:
+ return bp->ptp_info->set_hwtst(dev, rq, cmd);
+ case SIOCGHWTSTAMP:
+ return bp->ptp_info->get_hwtst(dev, rq);
+ default:
+ return phy_mii_ioctl(phydev, rq, cmd);
+ }
+}
+
+static int macb_set_features(struct net_device *netdev,
+ netdev_features_t features)
+{
+ struct macb *bp = netdev_priv(netdev);
+ netdev_features_t changed = features ^ netdev->features;
+
+ /* TX checksum offload */
+ if ((changed & NETIF_F_HW_CSUM) && macb_is_gem(bp)) {
+ u32 dmacfg;
+
+ dmacfg = gem_readl(bp, DMACFG);
+ if (features & NETIF_F_HW_CSUM)
+ dmacfg |= GEM_BIT(TXCOEN);
+ else
+ dmacfg &= ~GEM_BIT(TXCOEN);
+ gem_writel(bp, DMACFG, dmacfg);
+ }
+
+ /* RX checksum offload */
+ if ((changed & NETIF_F_RXCSUM) && macb_is_gem(bp)) {
+ u32 netcfg;
+
+ netcfg = gem_readl(bp, NCFGR);
+ if (features & NETIF_F_RXCSUM &&
+ !(netdev->flags & IFF_PROMISC))
+ netcfg |= GEM_BIT(RXCOEN);
+ else
+ netcfg &= ~GEM_BIT(RXCOEN);
+ gem_writel(bp, NCFGR, netcfg);
+ }
+
+ /* RX Flow Filters */
+ if ((changed & NETIF_F_NTUPLE) && macb_is_gem(bp)) {
+ bool turn_on = features & NETIF_F_NTUPLE;
+
+ gem_enable_flow_filters(bp, turn_on);
+ }
+ return 0;
+}
+
+static const struct net_device_ops macb_netdev_ops = {
+ .ndo_open = macb_open,
+ .ndo_stop = macb_close,
+ .ndo_start_xmit = macb_start_xmit,
+ .ndo_set_rx_mode = macb_set_rx_mode,
+ .ndo_get_stats = macb_get_stats,
+ .ndo_do_ioctl = macb_ioctl,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = macb_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = macb_poll_controller,
+#endif
+ .ndo_set_features = macb_set_features,
+ .ndo_features_check = macb_features_check,
+};
+
+/* Configure peripheral capabilities according to device tree
+ * and integration options used
+ */
+static void macb_configure_caps(struct macb *bp,
+ const struct macb_config *dt_conf)
+{
+ u32 dcfg;
+
+ if (dt_conf)
+ bp->caps = dt_conf->caps;
+
+ if (hw_is_gem(bp->regs, bp->native_io)) {
+ bp->caps |= MACB_CAPS_MACB_IS_GEM;
+
+ dcfg = gem_readl(bp, DCFG1);
+ if (GEM_BFEXT(IRQCOR, dcfg) == 0)
+ bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE;
+ dcfg = gem_readl(bp, DCFG2);
+ if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0)
+ bp->caps |= MACB_CAPS_FIFO_MODE;
+#ifdef CONFIG_MACB_USE_HWSTAMP
+ if (gem_has_ptp(bp)) {
+ if (!GEM_BFEXT(TSU, gem_readl(bp, DCFG5)))
+ pr_err("GEM doesn't support hardware ptp.\n");
+ else {
+ bp->hw_dma_cap |= HW_DMA_CAP_PTP;
+ bp->ptp_info = &gem_ptp_info;
+ }
+ }
+#endif
+ }
+
+ dev_dbg(&bp->pdev->dev, "Cadence caps 0x%08x\n", bp->caps);
+}
+
+static void macb_probe_queues(void __iomem *mem,
+ bool native_io,
+ unsigned int *queue_mask,
+ unsigned int *num_queues)
+{
+ unsigned int hw_q;
+
+ *queue_mask = 0x1;
+ *num_queues = 1;
+
+ /* is it macb or gem ?
+ *
+ * We need to read directly from the hardware here because
+ * we are early in the probe process and don't have the
+ * MACB_CAPS_MACB_IS_GEM flag positioned
+ */
+ if (!hw_is_gem(mem, native_io))
+ return;
+
+ /* bit 0 is never set but queue 0 always exists */
+ *queue_mask = readl_relaxed(mem + GEM_DCFG6) & 0xff;
+
+ *queue_mask |= 0x1;
+
+ for (hw_q = 1; hw_q < MACB_MAX_QUEUES; ++hw_q)
+ if (*queue_mask & (1 << hw_q))
+ (*num_queues)++;
+}
+
+static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
+ struct clk **hclk, struct clk **tx_clk,
+ struct clk **rx_clk)
+{
+ struct macb_platform_data *pdata;
+ int err;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata) {
+ *pclk = pdata->pclk;
+ *hclk = pdata->hclk;
+ } else {
+ *pclk = devm_clk_get(&pdev->dev, "pclk");
+ *hclk = devm_clk_get(&pdev->dev, "hclk");
+ }
+
+ if (IS_ERR(*pclk)) {
+ err = PTR_ERR(*pclk);
+ dev_err(&pdev->dev, "failed to get macb_clk (%u)\n", err);
+ return err;
+ }
+
+ if (IS_ERR(*hclk)) {
+ err = PTR_ERR(*hclk);
+ dev_err(&pdev->dev, "failed to get hclk (%u)\n", err);
+ return err;
+ }
+
+ *tx_clk = devm_clk_get(&pdev->dev, "tx_clk");
+ if (IS_ERR(*tx_clk))
+ *tx_clk = NULL;
+
+ *rx_clk = devm_clk_get(&pdev->dev, "rx_clk");
+ if (IS_ERR(*rx_clk))
+ *rx_clk = NULL;
+
+ err = clk_prepare_enable(*pclk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err);
+ return err;
+ }
+
+ err = clk_prepare_enable(*hclk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable hclk (%u)\n", err);
+ goto err_disable_pclk;
+ }
+
+ err = clk_prepare_enable(*tx_clk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err);
+ goto err_disable_hclk;
+ }
+
+ err = clk_prepare_enable(*rx_clk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable rx_clk (%u)\n", err);
+ goto err_disable_txclk;
+ }
+
+ return 0;
+
+err_disable_txclk:
+ clk_disable_unprepare(*tx_clk);
+
+err_disable_hclk:
+ clk_disable_unprepare(*hclk);
+
+err_disable_pclk:
+ clk_disable_unprepare(*pclk);
+
+ return err;
+}
+
+static int macb_init(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ unsigned int hw_q, q;
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue;
+ int err;
+ u32 val, reg;
+
+ bp->tx_ring_size = DEFAULT_TX_RING_SIZE;
+ bp->rx_ring_size = DEFAULT_RX_RING_SIZE;
+
+ /* set the queue register mapping once for all: queue0 has a special
+ * register mapping but we don't want to test the queue index then
+ * compute the corresponding register offset at run time.
+ */
+ for (hw_q = 0, q = 0; hw_q < MACB_MAX_QUEUES; ++hw_q) {
+ if (!(bp->queue_mask & (1 << hw_q)))
+ continue;
+
+ queue = &bp->queues[q];
+ queue->bp = bp;
+ netif_napi_add(dev, &queue->napi, macb_poll, 64);
+ if (hw_q) {
+ queue->ISR = GEM_ISR(hw_q - 1);
+ queue->IER = GEM_IER(hw_q - 1);
+ queue->IDR = GEM_IDR(hw_q - 1);
+ queue->IMR = GEM_IMR(hw_q - 1);
+ queue->TBQP = GEM_TBQP(hw_q - 1);
+ queue->RBQP = GEM_RBQP(hw_q - 1);
+ queue->RBQS = GEM_RBQS(hw_q - 1);
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
+ queue->TBQPH = GEM_TBQPH(hw_q - 1);
+ queue->RBQPH = GEM_RBQPH(hw_q - 1);
+ }
+#endif
+ } else {
+ /* queue0 uses legacy registers */
+ queue->ISR = MACB_ISR;
+ queue->IER = MACB_IER;
+ queue->IDR = MACB_IDR;
+ queue->IMR = MACB_IMR;
+ queue->TBQP = MACB_TBQP;
+ queue->RBQP = MACB_RBQP;
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
+ queue->TBQPH = MACB_TBQPH;
+ queue->RBQPH = MACB_RBQPH;
+ }
+#endif
+ }
+
+ /* get irq: here we use the linux queue index, not the hardware
+ * queue index. the queue irq definitions in the device tree
+ * must remove the optional gaps that could exist in the
+ * hardware queue mask.
+ */
+ queue->irq = platform_get_irq(pdev, q);
+ err = devm_request_irq(&pdev->dev, queue->irq, macb_interrupt,
+ IRQF_SHARED, dev->name, queue);
+ if (err) {
+ dev_err(&pdev->dev,
+ "Unable to request IRQ %d (error %d)\n",
+ queue->irq, err);
+ return err;
+ }
+
+ INIT_WORK(&queue->tx_error_task, macb_tx_error_task);
+ q++;
+ }
+
+ dev->netdev_ops = &macb_netdev_ops;
+
+ /* setup appropriated routines according to adapter type */
+ if (macb_is_gem(bp)) {
+ bp->max_tx_length = GEM_MAX_TX_LEN;
+ bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers;
+ bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers;
+ bp->macbgem_ops.mog_init_rings = gem_init_rings;
+ bp->macbgem_ops.mog_rx = gem_rx;
+ dev->ethtool_ops = &gem_ethtool_ops;
+ } else {
+ bp->max_tx_length = MACB_MAX_TX_LEN;
+ bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers;
+ bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers;
+ bp->macbgem_ops.mog_init_rings = macb_init_rings;
+ bp->macbgem_ops.mog_rx = macb_rx;
+ dev->ethtool_ops = &macb_ethtool_ops;
+ }
+
+ /* Set features */
+ dev->hw_features = NETIF_F_SG;
+
+ /* Check LSO capability */
+ if (GEM_BFEXT(PBUF_LSO, gem_readl(bp, DCFG6)))
+ dev->hw_features |= MACB_NETIF_LSO;
+
+ /* Checksum offload is only available on gem with packet buffer */
+ if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE))
+ dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
+ if (bp->caps & MACB_CAPS_SG_DISABLED)
+ dev->hw_features &= ~NETIF_F_SG;
+ dev->features = dev->hw_features;
+
+ /* Check RX Flow Filters support.
+ * Max Rx flows set by availability of screeners & compare regs:
+ * each 4-tuple define requires 1 T2 screener reg + 3 compare regs
+ */
+ reg = gem_readl(bp, DCFG8);
+ bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3),
+ GEM_BFEXT(T2SCR, reg));
+ if (bp->max_tuples > 0) {
+ /* also needs one ethtype match to check IPv4 */
+ if (GEM_BFEXT(SCR2ETH, reg) > 0) {
+ /* program this reg now */
+ reg = 0;
+ reg = GEM_BFINS(ETHTCMP, (uint16_t)ETH_P_IP, reg);
+ gem_writel_n(bp, ETHT, SCRT2_ETHT, reg);
+ /* Filtering is supported in hw but don't enable it in kernel now */
+ dev->hw_features |= NETIF_F_NTUPLE;
+ /* init Rx flow definitions */
+ INIT_LIST_HEAD(&bp->rx_fs_list.list);
+ bp->rx_fs_list.count = 0;
+ spin_lock_init(&bp->rx_fs_lock);
+ } else
+ bp->max_tuples = 0;
+ }
+
+ if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) {
+ val = 0;
+ if (bp->phy_interface == PHY_INTERFACE_MODE_RGMII)
+ val = GEM_BIT(RGMII);
+ else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII &&
+ (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
+ val = MACB_BIT(RMII);
+ else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
+ val = MACB_BIT(MII);
+
+ if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN)
+ val |= MACB_BIT(CLKEN);
+
+ macb_or_gem_writel(bp, USRIO, val);
+ }
+
+ /* Set MII management clock divider */
+ val = macb_mdc_clk_div(bp);
+ val |= macb_dbw(bp);
+ if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII)
+ val |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
+ macb_writel(bp, NCFGR, val);
+
+ return 0;
+}
+
+#if defined(CONFIG_OF)
+/* 1518 rounded up */
+#define AT91ETHER_MAX_RBUFF_SZ 0x600
+/* max number of receive buffers */
+#define AT91ETHER_MAX_RX_DESCR 9
+
+/* Initialize and start the Receiver and Transmit subsystems */
+static int at91ether_start(struct net_device *dev)
+{
+ struct macb *lp = netdev_priv(dev);
+ struct macb_queue *q = &lp->queues[0];
+ struct macb_dma_desc *desc;
+ dma_addr_t addr;
+ u32 ctl;
+ int i;
+
+ q->rx_ring = dma_alloc_coherent(&lp->pdev->dev,
+ (AT91ETHER_MAX_RX_DESCR *
+ macb_dma_desc_get_size(lp)),
+ &q->rx_ring_dma, GFP_KERNEL);
+ if (!q->rx_ring)
+ return -ENOMEM;
+
+ q->rx_buffers = dma_alloc_coherent(&lp->pdev->dev,
+ AT91ETHER_MAX_RX_DESCR *
+ AT91ETHER_MAX_RBUFF_SZ,
+ &q->rx_buffers_dma, GFP_KERNEL);
+ if (!q->rx_buffers) {
+ dma_free_coherent(&lp->pdev->dev,
+ AT91ETHER_MAX_RX_DESCR *
+ macb_dma_desc_get_size(lp),
+ q->rx_ring, q->rx_ring_dma);
+ q->rx_ring = NULL;
+ return -ENOMEM;
+ }
+
+ addr = q->rx_buffers_dma;
+ for (i = 0; i < AT91ETHER_MAX_RX_DESCR; i++) {
+ desc = macb_rx_desc(q, i);
+ macb_set_addr(lp, desc, addr);
+ desc->ctrl = 0;
+ addr += AT91ETHER_MAX_RBUFF_SZ;
+ }
+
+ /* Set the Wrap bit on the last descriptor */
+ desc->addr |= MACB_BIT(RX_WRAP);
+
+ /* Reset buffer index */
+ q->rx_tail = 0;
+
+ /* Program address of descriptor list in Rx Buffer Queue register */
+ macb_writel(lp, RBQP, q->rx_ring_dma);
+
+ /* Enable Receive and Transmit */
+ ctl = macb_readl(lp, NCR);
+ macb_writel(lp, NCR, ctl | MACB_BIT(RE) | MACB_BIT(TE));
+
+ return 0;
+}
+
+/* Open the ethernet interface */
+static int at91ether_open(struct net_device *dev)
+{
+ struct macb *lp = netdev_priv(dev);
+ u32 ctl;
+ int ret;
+
+ /* Clear internal statistics */
+ ctl = macb_readl(lp, NCR);
+ macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT));
+
+ macb_set_hwaddr(lp);
+
+ ret = at91ether_start(dev);
+ if (ret)
+ return ret;
+
+ /* Enable MAC interrupts */
+ macb_writel(lp, IER, MACB_BIT(RCOMP) |
+ MACB_BIT(RXUBR) |
+ MACB_BIT(ISR_TUND) |
+ MACB_BIT(ISR_RLE) |
+ MACB_BIT(TCOMP) |
+ MACB_BIT(ISR_ROVR) |
+ MACB_BIT(HRESP));
+
+ /* schedule a link state check */
+ phy_start(dev->phydev);
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+/* Close the interface */
+static int at91ether_close(struct net_device *dev)
+{
+ struct macb *lp = netdev_priv(dev);
+ struct macb_queue *q = &lp->queues[0];
+ u32 ctl;
+
+ /* Disable Receiver and Transmitter */
+ ctl = macb_readl(lp, NCR);
+ macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE)));
+
+ /* Disable MAC interrupts */
+ macb_writel(lp, IDR, MACB_BIT(RCOMP) |
+ MACB_BIT(RXUBR) |
+ MACB_BIT(ISR_TUND) |
+ MACB_BIT(ISR_RLE) |
+ MACB_BIT(TCOMP) |
+ MACB_BIT(ISR_ROVR) |
+ MACB_BIT(HRESP));
+
+ netif_stop_queue(dev);
+
+ dma_free_coherent(&lp->pdev->dev,
+ AT91ETHER_MAX_RX_DESCR *
+ macb_dma_desc_get_size(lp),
+ q->rx_ring, q->rx_ring_dma);
+ q->rx_ring = NULL;
+
+ dma_free_coherent(&lp->pdev->dev,
+ AT91ETHER_MAX_RX_DESCR * AT91ETHER_MAX_RBUFF_SZ,
+ q->rx_buffers, q->rx_buffers_dma);
+ q->rx_buffers = NULL;
+
+ return 0;
+}
+
+/* Transmit packet */
+static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct macb *lp = netdev_priv(dev);
+
+ if (macb_readl(lp, TSR) & MACB_BIT(RM9200_BNQ)) {
+ netif_stop_queue(dev);
+
+ /* Store packet information (to free when Tx completed) */
+ lp->skb = skb;
+ lp->skb_length = skb->len;
+ lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(NULL, lp->skb_physaddr)) {
+ dev_kfree_skb_any(skb);
+ dev->stats.tx_dropped++;
+ netdev_err(dev, "%s: DMA mapping error\n", __func__);
+ return NETDEV_TX_OK;
+ }
+
+ /* Set address of the data in the Transmit Address register */
+ macb_writel(lp, TAR, lp->skb_physaddr);
+ /* Set length of the packet in the Transmit Control register */
+ macb_writel(lp, TCR, skb->len);
+
+ } else {
+ netdev_err(dev, "%s called, but device is busy!\n", __func__);
+ return NETDEV_TX_BUSY;
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/* Extract received frame from buffer descriptors and sent to upper layers.
+ * (Called from interrupt context)
+ */
+static void at91ether_rx(struct net_device *dev)
+{
+ struct macb *lp = netdev_priv(dev);
+ struct macb_queue *q = &lp->queues[0];
+ struct macb_dma_desc *desc;
+ unsigned char *p_recv;
+ struct sk_buff *skb;
+ unsigned int pktlen;
+
+ desc = macb_rx_desc(q, q->rx_tail);
+ while (desc->addr & MACB_BIT(RX_USED)) {
+ p_recv = q->rx_buffers + q->rx_tail * AT91ETHER_MAX_RBUFF_SZ;
+ pktlen = MACB_BF(RX_FRMLEN, desc->ctrl);
+ skb = netdev_alloc_skb(dev, pktlen + 2);
+ if (skb) {
+ skb_reserve(skb, 2);
+ skb_put_data(skb, p_recv, pktlen);
+
+ skb->protocol = eth_type_trans(skb, dev);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pktlen;
+ netif_rx(skb);
+ } else {
+ dev->stats.rx_dropped++;
+ }
+
+ if (desc->ctrl & MACB_BIT(RX_MHASH_MATCH))
+ dev->stats.multicast++;
+
+ /* reset ownership bit */
+ desc->addr &= ~MACB_BIT(RX_USED);
+
+ /* wrap after last buffer */
+ if (q->rx_tail == AT91ETHER_MAX_RX_DESCR - 1)
+ q->rx_tail = 0;
+ else
+ q->rx_tail++;
+
+ desc = macb_rx_desc(q, q->rx_tail);
+ }
+}
+
+/* MAC interrupt handler */
+static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct macb *lp = netdev_priv(dev);
+ u32 intstatus, ctl;
+
+ /* MAC Interrupt Status register indicates what interrupts are pending.
+ * It is automatically cleared once read.
+ */
+ intstatus = macb_readl(lp, ISR);
+
+ /* Receive complete */
+ if (intstatus & MACB_BIT(RCOMP))
+ at91ether_rx(dev);
+
+ /* Transmit complete */
+ if (intstatus & MACB_BIT(TCOMP)) {
+ /* The TCOM bit is set even if the transmission failed */
+ if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)))
+ dev->stats.tx_errors++;
+
+ if (lp->skb) {
+ dev_kfree_skb_irq(lp->skb);
+ lp->skb = NULL;
+ dma_unmap_single(NULL, lp->skb_physaddr,
+ lp->skb_length, DMA_TO_DEVICE);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += lp->skb_length;
+ }
+ netif_wake_queue(dev);
+ }
+
+ /* Work-around for EMAC Errata section 41.3.1 */
+ if (intstatus & MACB_BIT(RXUBR)) {
+ ctl = macb_readl(lp, NCR);
+ macb_writel(lp, NCR, ctl & ~MACB_BIT(RE));
+ wmb();
+ macb_writel(lp, NCR, ctl | MACB_BIT(RE));
+ }
+
+ if (intstatus & MACB_BIT(ISR_ROVR))
+ netdev_err(dev, "ROVR error\n");
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void at91ether_poll_controller(struct net_device *dev)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ at91ether_interrupt(dev->irq, dev);
+ local_irq_restore(flags);
+}
+#endif
+
+static const struct net_device_ops at91ether_netdev_ops = {
+ .ndo_open = at91ether_open,
+ .ndo_stop = at91ether_close,
+ .ndo_start_xmit = at91ether_start_xmit,
+ .ndo_get_stats = macb_get_stats,
+ .ndo_set_rx_mode = macb_set_rx_mode,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_do_ioctl = macb_ioctl,
+ .ndo_validate_addr = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = at91ether_poll_controller,
+#endif
+};
+
+static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk,
+ struct clk **hclk, struct clk **tx_clk,
+ struct clk **rx_clk)
+{
+ int err;
+
+ *hclk = NULL;
+ *tx_clk = NULL;
+ *rx_clk = NULL;
+
+ *pclk = devm_clk_get(&pdev->dev, "ether_clk");
+ if (IS_ERR(*pclk))
+ return PTR_ERR(*pclk);
+
+ err = clk_prepare_enable(*pclk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable pclk (%u)\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int at91ether_init(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct macb *bp = netdev_priv(dev);
+ int err;
+ u32 reg;
+
+ bp->queues[0].bp = bp;
+
+ dev->netdev_ops = &at91ether_netdev_ops;
+ dev->ethtool_ops = &macb_ethtool_ops;
+
+ err = devm_request_irq(&pdev->dev, dev->irq, at91ether_interrupt,
+ 0, dev->name, dev);
+ if (err)
+ return err;
+
+ macb_writel(bp, NCR, 0);
+
+ reg = MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG);
+ if (bp->phy_interface == PHY_INTERFACE_MODE_RMII)
+ reg |= MACB_BIT(RM9200_RMII);
+
+ macb_writel(bp, NCFGR, reg);
+
+ return 0;
+}
+
+static const struct macb_config at91sam9260_config = {
+ .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config sama5d3macb_config = {
+ .caps = MACB_CAPS_SG_DISABLED
+ | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config pc302gem_config = {
+ .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config sama5d2_config = {
+ .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config sama5d3_config = {
+ .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE
+ | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_JUMBO,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+ .jumbo_max_len = 10240,
+};
+
+static const struct macb_config sama5d4_config = {
+ .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .dma_burst_length = 4,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config emac_config = {
+ .clk_init = at91ether_clk_init,
+ .init = at91ether_init,
+};
+
+static const struct macb_config np4_config = {
+ .caps = MACB_CAPS_USRIO_DISABLED,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct macb_config zynqmp_config = {
+ .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+ MACB_CAPS_JUMBO |
+ MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+ .jumbo_max_len = 10240,
+};
+
+static const struct macb_config zynq_config = {
+ .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_NO_GIGABIT_HALF,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+};
+
+static const struct of_device_id macb_dt_ids[] = {
+ { .compatible = "cdns,at32ap7000-macb" },
+ { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
+ { .compatible = "cdns,macb" },
+ { .compatible = "cdns,np4-macb", .data = &np4_config },
+ { .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
+ { .compatible = "cdns,gem", .data = &pc302gem_config },
+ { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
+ { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
+ { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config },
+ { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
+ { .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
+ { .compatible = "cdns,emac", .data = &emac_config },
+ { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
+ { .compatible = "cdns,zynq-gem", .data = &zynq_config },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, macb_dt_ids);
+#endif /* CONFIG_OF */
+
+static const struct macb_config default_gem_config = {
+ .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+ MACB_CAPS_JUMBO |
+ MACB_CAPS_GEM_HAS_PTP,
+ .dma_burst_length = 16,
+ .clk_init = macb_clk_init,
+ .init = macb_init,
+ .jumbo_max_len = 10240,
+};
+
+static int macb_probe(struct platform_device *pdev)
+{
+ const struct macb_config *macb_config = &default_gem_config;
+ int (*clk_init)(struct platform_device *, struct clk **,
+ struct clk **, struct clk **, struct clk **)
+ = macb_config->clk_init;
+ int (*init)(struct platform_device *) = macb_config->init;
+ struct device_node *np = pdev->dev.of_node;
+ struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
+ unsigned int queue_mask, num_queues;
+ struct macb_platform_data *pdata;
+ bool native_io;
+ struct phy_device *phydev;
+ struct net_device *dev;
+ struct resource *regs;
+ void __iomem *mem;
+ const char *mac;
+ struct macb *bp;
+ int err, val;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mem = devm_ioremap_resource(&pdev->dev, regs);
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ if (np) {
+ const struct of_device_id *match;
+
+ match = of_match_node(macb_dt_ids, np);
+ if (match && match->data) {
+ macb_config = match->data;
+ clk_init = macb_config->clk_init;
+ init = macb_config->init;
+ }
+ }
+
+ err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk);
+ if (err)
+ return err;
+
+ native_io = hw_is_native_io(mem);
+
+ macb_probe_queues(mem, native_io, &queue_mask, &num_queues);
+ dev = alloc_etherdev_mq(sizeof(*bp), num_queues);
+ if (!dev) {
+ err = -ENOMEM;
+ goto err_disable_clocks;
+ }
+
+ dev->base_addr = regs->start;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ bp = netdev_priv(dev);
+ bp->pdev = pdev;
+ bp->dev = dev;
+ bp->regs = mem;
+ bp->native_io = native_io;
+ if (native_io) {
+ bp->macb_reg_readl = hw_readl_native;
+ bp->macb_reg_writel = hw_writel_native;
+ } else {
+ bp->macb_reg_readl = hw_readl;
+ bp->macb_reg_writel = hw_writel;
+ }
+ bp->num_queues = num_queues;
+ bp->queue_mask = queue_mask;
+ if (macb_config)
+ bp->dma_burst_length = macb_config->dma_burst_length;
+ bp->pclk = pclk;
+ bp->hclk = hclk;
+ bp->tx_clk = tx_clk;
+ bp->rx_clk = rx_clk;
+ if (macb_config)
+ bp->jumbo_max_len = macb_config->jumbo_max_len;
+
+ bp->wol = 0;
+ if (of_get_property(np, "magic-packet", NULL))
+ bp->wol |= MACB_WOL_HAS_MAGIC_PACKET;
+ device_init_wakeup(&pdev->dev, bp->wol & MACB_WOL_HAS_MAGIC_PACKET);
+
+ spin_lock_init(&bp->lock);
+
+ /* setup capabilities */
+ macb_configure_caps(bp, macb_config);
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (GEM_BFEXT(DAW64, gem_readl(bp, DCFG6))) {
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(44));
+ bp->hw_dma_cap |= HW_DMA_CAP_64B;
+ }
+#endif
+ platform_set_drvdata(pdev, dev);
+
+ dev->irq = platform_get_irq(pdev, 0);
+ if (dev->irq < 0) {
+ err = dev->irq;
+ goto err_out_free_netdev;
+ }
+
+ /* MTU range: 68 - 1500 or 10240 */
+ dev->min_mtu = GEM_MTU_MIN_SIZE;
+ if (bp->caps & MACB_CAPS_JUMBO)
+ dev->max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN;
+ else
+ dev->max_mtu = ETH_DATA_LEN;
+
+ if (bp->caps & MACB_CAPS_BD_RD_PREFETCH) {
+ val = GEM_BFEXT(RXBD_RDBUFF, gem_readl(bp, DCFG10));
+ if (val)
+ bp->rx_bd_rd_prefetch = (2 << (val - 1)) *
+ macb_dma_desc_get_size(bp);
+
+ val = GEM_BFEXT(TXBD_RDBUFF, gem_readl(bp, DCFG10));
+ if (val)
+ bp->tx_bd_rd_prefetch = (2 << (val - 1)) *
+ macb_dma_desc_get_size(bp);
+ }
+
+ mac = of_get_mac_address(np);
+ if (mac) {
+ ether_addr_copy(bp->dev->dev_addr, mac);
+ } else {
+ err = of_get_nvmem_mac_address(np, bp->dev->dev_addr);
+ if (err) {
+ if (err == -EPROBE_DEFER)
+ goto err_out_free_netdev;
+ macb_get_hwaddr(bp);
+ }
+ }
+
+ err = of_get_phy_mode(np);
+ if (err < 0) {
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata && pdata->is_rmii)
+ bp->phy_interface = PHY_INTERFACE_MODE_RMII;
+ else
+ bp->phy_interface = PHY_INTERFACE_MODE_MII;
+ } else {
+ bp->phy_interface = err;
+ }
+
+ /* IP specific init */
+ err = init(pdev);
+ if (err)
+ goto err_out_free_netdev;
+
+ err = macb_mii_init(bp);
+ if (err)
+ goto err_out_free_netdev;
+
+ phydev = dev->phydev;
+
+ netif_carrier_off(dev);
+
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
+ goto err_out_unregister_mdio;
+ }
+
+ tasklet_init(&bp->hresp_err_tasklet, macb_hresp_error_task,
+ (unsigned long)bp);
+
+ phy_attached_info(phydev);
+
+ netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n",
+ macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID),
+ dev->base_addr, dev->irq, dev->dev_addr);
+
+ return 0;
+
+err_out_unregister_mdio:
+ phy_disconnect(dev->phydev);
+ mdiobus_unregister(bp->mii_bus);
+ of_node_put(bp->phy_node);
+ if (np && of_phy_is_fixed_link(np))
+ of_phy_deregister_fixed_link(np);
+ mdiobus_free(bp->mii_bus);
+
+err_out_free_netdev:
+ free_netdev(dev);
+
+err_disable_clocks:
+ clk_disable_unprepare(tx_clk);
+ clk_disable_unprepare(hclk);
+ clk_disable_unprepare(pclk);
+ clk_disable_unprepare(rx_clk);
+
+ return err;
+}
+
+static int macb_remove(struct platform_device *pdev)
+{
+ struct net_device *dev;
+ struct macb *bp;
+ struct device_node *np = pdev->dev.of_node;
+
+ dev = platform_get_drvdata(pdev);
+
+ if (dev) {
+ bp = netdev_priv(dev);
+ if (dev->phydev)
+ phy_disconnect(dev->phydev);
+ mdiobus_unregister(bp->mii_bus);
+ if (np && of_phy_is_fixed_link(np))
+ of_phy_deregister_fixed_link(np);
+ dev->phydev = NULL;
+ mdiobus_free(bp->mii_bus);
+
+ unregister_netdev(dev);
+ clk_disable_unprepare(bp->tx_clk);
+ clk_disable_unprepare(bp->hclk);
+ clk_disable_unprepare(bp->pclk);
+ clk_disable_unprepare(bp->rx_clk);
+ of_node_put(bp->phy_node);
+ free_netdev(dev);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused macb_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct net_device *netdev = platform_get_drvdata(pdev);
+ struct macb *bp = netdev_priv(netdev);
+
+ netif_carrier_off(netdev);
+ netif_device_detach(netdev);
+
+ if (bp->wol & MACB_WOL_ENABLED) {
+ macb_writel(bp, IER, MACB_BIT(WOL));
+ macb_writel(bp, WOL, MACB_BIT(MAG));
+ enable_irq_wake(bp->queues[0].irq);
+ } else {
+ clk_disable_unprepare(bp->tx_clk);
+ clk_disable_unprepare(bp->hclk);
+ clk_disable_unprepare(bp->pclk);
+ clk_disable_unprepare(bp->rx_clk);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused macb_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct net_device *netdev = platform_get_drvdata(pdev);
+ struct macb *bp = netdev_priv(netdev);
+
+ if (bp->wol & MACB_WOL_ENABLED) {
+ macb_writel(bp, IDR, MACB_BIT(WOL));
+ macb_writel(bp, WOL, 0);
+ disable_irq_wake(bp->queues[0].irq);
+ } else {
+ clk_prepare_enable(bp->pclk);
+ clk_prepare_enable(bp->hclk);
+ clk_prepare_enable(bp->tx_clk);
+ clk_prepare_enable(bp->rx_clk);
+ }
+
+ netif_device_attach(netdev);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(macb_pm_ops, macb_suspend, macb_resume);
+
+static struct platform_driver macb_driver = {
+ .probe = macb_probe,
+ .remove = macb_remove,
+ .driver = {
+ .name = "macb",
+ .of_match_table = of_match_ptr(macb_dt_ids),
+ .pm = &macb_pm_ops,
+ },
+};
+
+module_platform_driver(macb_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence MACB/GEM Ethernet driver");
+MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
+MODULE_ALIAS("platform:macb");
diff --git a/drivers/net/ethernet/cadence/macb_pci.c b/drivers/net/ethernet/cadence/macb_pci.c
new file mode 100644
index 0000000..248a8fc
--- /dev/null
+++ b/drivers/net/ethernet/cadence/macb_pci.c
@@ -0,0 +1,146 @@
+/**
+ * Cadence GEM PCI wrapper.
+ *
+ * Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com
+ *
+ * Authors: Rafal Ozieblo <rafalo@cadence.com>
+ * Bartosz Folta <bfolta@cadence.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_data/macb.h>
+#include <linux/platform_device.h>
+#include "macb.h"
+
+#define PCI_DRIVER_NAME "macb_pci"
+#define PLAT_DRIVER_NAME "macb"
+
+#define CDNS_VENDOR_ID 0x17cd
+#define CDNS_DEVICE_ID 0xe007
+
+#define GEM_PCLK_RATE 50000000
+#define GEM_HCLK_RATE 50000000
+
+static int macb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int err;
+ struct platform_device *plat_dev;
+ struct platform_device_info plat_info;
+ struct macb_platform_data plat_data;
+ struct resource res[2];
+
+ /* enable pci device */
+ err = pcim_enable_device(pdev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Enabling PCI device has failed: %d", err);
+ return err;
+ }
+
+ pci_set_master(pdev);
+
+ /* set up resources */
+ memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
+ res[0].start = pci_resource_start(pdev, 0);
+ res[0].end = pci_resource_end(pdev, 0);
+ res[0].name = PCI_DRIVER_NAME;
+ res[0].flags = IORESOURCE_MEM;
+ res[1].start = pci_irq_vector(pdev, 0);
+ res[1].name = PCI_DRIVER_NAME;
+ res[1].flags = IORESOURCE_IRQ;
+
+ dev_info(&pdev->dev, "EMAC physical base addr: %pa\n",
+ &res[0].start);
+
+ /* set up macb platform data */
+ memset(&plat_data, 0, sizeof(plat_data));
+
+ /* initialize clocks */
+ plat_data.pclk = clk_register_fixed_rate(&pdev->dev, "pclk", NULL, 0,
+ GEM_PCLK_RATE);
+ if (IS_ERR(plat_data.pclk)) {
+ err = PTR_ERR(plat_data.pclk);
+ goto err_pclk_register;
+ }
+
+ plat_data.hclk = clk_register_fixed_rate(&pdev->dev, "hclk", NULL, 0,
+ GEM_HCLK_RATE);
+ if (IS_ERR(plat_data.hclk)) {
+ err = PTR_ERR(plat_data.hclk);
+ goto err_hclk_register;
+ }
+
+ /* set up platform device info */
+ memset(&plat_info, 0, sizeof(plat_info));
+ plat_info.parent = &pdev->dev;
+ plat_info.fwnode = pdev->dev.fwnode;
+ plat_info.name = PLAT_DRIVER_NAME;
+ plat_info.id = pdev->devfn;
+ plat_info.res = res;
+ plat_info.num_res = ARRAY_SIZE(res);
+ plat_info.data = &plat_data;
+ plat_info.size_data = sizeof(plat_data);
+ plat_info.dma_mask = pdev->dma_mask;
+
+ /* register platform device */
+ plat_dev = platform_device_register_full(&plat_info);
+ if (IS_ERR(plat_dev)) {
+ err = PTR_ERR(plat_dev);
+ goto err_plat_dev_register;
+ }
+
+ pci_set_drvdata(pdev, plat_dev);
+
+ return 0;
+
+err_plat_dev_register:
+ clk_unregister(plat_data.hclk);
+
+err_hclk_register:
+ clk_unregister(plat_data.pclk);
+
+err_pclk_register:
+ return err;
+}
+
+static void macb_remove(struct pci_dev *pdev)
+{
+ struct platform_device *plat_dev = pci_get_drvdata(pdev);
+ struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev);
+
+ platform_device_unregister(plat_dev);
+ clk_unregister(plat_data->pclk);
+ clk_unregister(plat_data->hclk);
+}
+
+static const struct pci_device_id dev_id_table[] = {
+ { PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
+ { 0, }
+};
+
+static struct pci_driver macb_pci_driver = {
+ .name = PCI_DRIVER_NAME,
+ .id_table = dev_id_table,
+ .probe = macb_probe,
+ .remove = macb_remove,
+};
+
+module_pci_driver(macb_pci_driver);
+MODULE_DEVICE_TABLE(pci, dev_id_table);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence NIC PCI wrapper");
diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c
new file mode 100644
index 0000000..cd5296b
--- /dev/null
+++ b/drivers/net/ethernet/cadence/macb_ptp.c
@@ -0,0 +1,516 @@
+/**
+ * 1588 PTP support for Cadence GEM device.
+ *
+ * Copyright (C) 2017 Cadence Design Systems - http://www.cadence.com
+ *
+ * Authors: Rafal Ozieblo <rafalo@cadence.com>
+ * Bartosz Folta <bfolta@cadence.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+#include <linux/time64.h>
+#include <linux/ptp_classify.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/net_tstamp.h>
+#include <linux/circ_buf.h>
+#include <linux/spinlock.h>
+
+#include "macb.h"
+
+#define GEM_PTP_TIMER_NAME "gem-ptp-timer"
+
+static struct macb_dma_desc_ptp *macb_ptp_desc(struct macb *bp,
+ struct macb_dma_desc *desc)
+{
+ if (bp->hw_dma_cap == HW_DMA_CAP_PTP)
+ return (struct macb_dma_desc_ptp *)
+ ((u8 *)desc + sizeof(struct macb_dma_desc));
+ if (bp->hw_dma_cap == HW_DMA_CAP_64B_PTP)
+ return (struct macb_dma_desc_ptp *)
+ ((u8 *)desc + sizeof(struct macb_dma_desc)
+ + sizeof(struct macb_dma_desc_64));
+ return NULL;
+}
+
+static int gem_tsu_get_time(struct ptp_clock_info *ptp, struct timespec64 *ts)
+{
+ struct macb *bp = container_of(ptp, struct macb, ptp_clock_info);
+ unsigned long flags;
+ long first, second;
+ u32 secl, sech;
+
+ spin_lock_irqsave(&bp->tsu_clk_lock, flags);
+ first = gem_readl(bp, TN);
+ secl = gem_readl(bp, TSL);
+ sech = gem_readl(bp, TSH);
+ second = gem_readl(bp, TN);
+
+ /* test for nsec rollover */
+ if (first > second) {
+ /* if so, use later read & re-read seconds
+ * (assume all done within 1s)
+ */
+ ts->tv_nsec = gem_readl(bp, TN);
+ secl = gem_readl(bp, TSL);
+ sech = gem_readl(bp, TSH);
+ } else {
+ ts->tv_nsec = first;
+ }
+
+ spin_unlock_irqrestore(&bp->tsu_clk_lock, flags);
+ ts->tv_sec = (((u64)sech << GEM_TSL_SIZE) | secl)
+ & TSU_SEC_MAX_VAL;
+ return 0;
+}
+
+static int gem_tsu_set_time(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct macb *bp = container_of(ptp, struct macb, ptp_clock_info);
+ unsigned long flags;
+ u32 ns, sech, secl;
+
+ secl = (u32)ts->tv_sec;
+ sech = (ts->tv_sec >> GEM_TSL_SIZE) & ((1 << GEM_TSH_SIZE) - 1);
+ ns = ts->tv_nsec;
+
+ spin_lock_irqsave(&bp->tsu_clk_lock, flags);
+
+ /* TSH doesn't latch the time and no atomicity! */
+ gem_writel(bp, TN, 0); /* clear to avoid overflow */
+ gem_writel(bp, TSH, sech);
+ /* write lower bits 2nd, for synchronized secs update */
+ gem_writel(bp, TSL, secl);
+ gem_writel(bp, TN, ns);
+
+ spin_unlock_irqrestore(&bp->tsu_clk_lock, flags);
+
+ return 0;
+}
+
+static int gem_tsu_incr_set(struct macb *bp, struct tsu_incr *incr_spec)
+{
+ unsigned long flags;
+
+ /* tsu_timer_incr register must be written after
+ * the tsu_timer_incr_sub_ns register and the write operation
+ * will cause the value written to the tsu_timer_incr_sub_ns register
+ * to take effect.
+ */
+ spin_lock_irqsave(&bp->tsu_clk_lock, flags);
+ gem_writel(bp, TISUBN, GEM_BF(SUBNSINCR, incr_spec->sub_ns));
+ gem_writel(bp, TI, GEM_BF(NSINCR, incr_spec->ns));
+ spin_unlock_irqrestore(&bp->tsu_clk_lock, flags);
+
+ return 0;
+}
+
+static int gem_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ struct macb *bp = container_of(ptp, struct macb, ptp_clock_info);
+ struct tsu_incr incr_spec;
+ bool neg_adj = false;
+ u32 word;
+ u64 adj;
+
+ if (scaled_ppm < 0) {
+ neg_adj = true;
+ scaled_ppm = -scaled_ppm;
+ }
+
+ /* Adjustment is relative to base frequency */
+ incr_spec.sub_ns = bp->tsu_incr.sub_ns;
+ incr_spec.ns = bp->tsu_incr.ns;
+
+ /* scaling: unused(8bit) | ns(8bit) | fractions(16bit) */
+ word = ((u64)incr_spec.ns << GEM_SUBNSINCR_SIZE) + incr_spec.sub_ns;
+ adj = (u64)scaled_ppm * word;
+ /* Divide with rounding, equivalent to floating dividing:
+ * (temp / USEC_PER_SEC) + 0.5
+ */
+ adj += (USEC_PER_SEC >> 1);
+ adj >>= GEM_SUBNSINCR_SIZE; /* remove fractions */
+ adj = div_u64(adj, USEC_PER_SEC);
+ adj = neg_adj ? (word - adj) : (word + adj);
+
+ incr_spec.ns = (adj >> GEM_SUBNSINCR_SIZE)
+ & ((1 << GEM_NSINCR_SIZE) - 1);
+ incr_spec.sub_ns = adj & ((1 << GEM_SUBNSINCR_SIZE) - 1);
+ gem_tsu_incr_set(bp, &incr_spec);
+ return 0;
+}
+
+static int gem_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ struct macb *bp = container_of(ptp, struct macb, ptp_clock_info);
+ struct timespec64 now, then = ns_to_timespec64(delta);
+ u32 adj, sign = 0;
+
+ if (delta < 0) {
+ sign = 1;
+ delta = -delta;
+ }
+
+ if (delta > TSU_NSEC_MAX_VAL) {
+ gem_tsu_get_time(&bp->ptp_clock_info, &now);
+ now = timespec64_add(now, then);
+
+ gem_tsu_set_time(&bp->ptp_clock_info,
+ (const struct timespec64 *)&now);
+ } else {
+ adj = (sign << GEM_ADDSUB_OFFSET) | delta;
+
+ gem_writel(bp, TA, adj);
+ }
+
+ return 0;
+}
+
+static int gem_ptp_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
+{
+ return -EOPNOTSUPP;
+}
+
+static const struct ptp_clock_info gem_ptp_caps_template = {
+ .owner = THIS_MODULE,
+ .name = GEM_PTP_TIMER_NAME,
+ .max_adj = 0,
+ .n_alarm = 0,
+ .n_ext_ts = 0,
+ .n_per_out = 0,
+ .n_pins = 0,
+ .pps = 1,
+ .adjfine = gem_ptp_adjfine,
+ .adjtime = gem_ptp_adjtime,
+ .gettime64 = gem_tsu_get_time,
+ .settime64 = gem_tsu_set_time,
+ .enable = gem_ptp_enable,
+};
+
+static void gem_ptp_init_timer(struct macb *bp)
+{
+ u32 rem = 0;
+ u64 adj;
+
+ bp->tsu_incr.ns = div_u64_rem(NSEC_PER_SEC, bp->tsu_rate, &rem);
+ if (rem) {
+ adj = rem;
+ adj <<= GEM_SUBNSINCR_SIZE;
+ bp->tsu_incr.sub_ns = div_u64(adj, bp->tsu_rate);
+ } else {
+ bp->tsu_incr.sub_ns = 0;
+ }
+}
+
+static void gem_ptp_init_tsu(struct macb *bp)
+{
+ struct timespec64 ts;
+
+ /* 1. get current system time */
+ ts = ns_to_timespec64(ktime_to_ns(ktime_get_real()));
+
+ /* 2. set ptp timer */
+ gem_tsu_set_time(&bp->ptp_clock_info, &ts);
+
+ /* 3. set PTP timer increment value to BASE_INCREMENT */
+ gem_tsu_incr_set(bp, &bp->tsu_incr);
+
+ gem_writel(bp, TA, 0);
+}
+
+static void gem_ptp_clear_timer(struct macb *bp)
+{
+ bp->tsu_incr.sub_ns = 0;
+ bp->tsu_incr.ns = 0;
+
+ gem_writel(bp, TISUBN, GEM_BF(SUBNSINCR, 0));
+ gem_writel(bp, TI, GEM_BF(NSINCR, 0));
+ gem_writel(bp, TA, 0);
+}
+
+static int gem_hw_timestamp(struct macb *bp, u32 dma_desc_ts_1,
+ u32 dma_desc_ts_2, struct timespec64 *ts)
+{
+ struct timespec64 tsu;
+
+ ts->tv_sec = (GEM_BFEXT(DMA_SECH, dma_desc_ts_2) << GEM_DMA_SECL_SIZE) |
+ GEM_BFEXT(DMA_SECL, dma_desc_ts_1);
+ ts->tv_nsec = GEM_BFEXT(DMA_NSEC, dma_desc_ts_1);
+
+ /* TSU overlapping workaround
+ * The timestamp only contains lower few bits of seconds,
+ * so add value from 1588 timer
+ */
+ gem_tsu_get_time(&bp->ptp_clock_info, &tsu);
+
+ /* If the top bit is set in the timestamp,
+ * but not in 1588 timer, it has rolled over,
+ * so subtract max size
+ */
+ if ((ts->tv_sec & (GEM_DMA_SEC_TOP >> 1)) &&
+ !(tsu.tv_sec & (GEM_DMA_SEC_TOP >> 1)))
+ ts->tv_sec -= GEM_DMA_SEC_TOP;
+
+ ts->tv_sec += ((~GEM_DMA_SEC_MASK) & tsu.tv_sec);
+
+ return 0;
+}
+
+void gem_ptp_rxstamp(struct macb *bp, struct sk_buff *skb,
+ struct macb_dma_desc *desc)
+{
+ struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
+ struct macb_dma_desc_ptp *desc_ptp;
+ struct timespec64 ts;
+
+ if (GEM_BFEXT(DMA_RXVALID, desc->addr)) {
+ desc_ptp = macb_ptp_desc(bp, desc);
+ gem_hw_timestamp(bp, desc_ptp->ts_1, desc_ptp->ts_2, &ts);
+ memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
+ shhwtstamps->hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);
+ }
+}
+
+static void gem_tstamp_tx(struct macb *bp, struct sk_buff *skb,
+ struct macb_dma_desc_ptp *desc_ptp)
+{
+ struct skb_shared_hwtstamps shhwtstamps;
+ struct timespec64 ts;
+
+ gem_hw_timestamp(bp, desc_ptp->ts_1, desc_ptp->ts_2, &ts);
+ memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+ shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);
+ skb_tstamp_tx(skb, &shhwtstamps);
+}
+
+int gem_ptp_txstamp(struct macb_queue *queue, struct sk_buff *skb,
+ struct macb_dma_desc *desc)
+{
+ unsigned long tail = READ_ONCE(queue->tx_ts_tail);
+ unsigned long head = queue->tx_ts_head;
+ struct macb_dma_desc_ptp *desc_ptp;
+ struct gem_tx_ts *tx_timestamp;
+
+ if (!GEM_BFEXT(DMA_TXVALID, desc->ctrl))
+ return -EINVAL;
+
+ if (CIRC_SPACE(head, tail, PTP_TS_BUFFER_SIZE) == 0)
+ return -ENOMEM;
+
+ skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+ desc_ptp = macb_ptp_desc(queue->bp, desc);
+ tx_timestamp = &queue->tx_timestamps[head];
+ tx_timestamp->skb = skb;
+ tx_timestamp->desc_ptp.ts_1 = desc_ptp->ts_1;
+ tx_timestamp->desc_ptp.ts_2 = desc_ptp->ts_2;
+ /* move head */
+ smp_store_release(&queue->tx_ts_head,
+ (head + 1) & (PTP_TS_BUFFER_SIZE - 1));
+
+ schedule_work(&queue->tx_ts_task);
+ return 0;
+}
+
+static void gem_tx_timestamp_flush(struct work_struct *work)
+{
+ struct macb_queue *queue =
+ container_of(work, struct macb_queue, tx_ts_task);
+ unsigned long head, tail;
+ struct gem_tx_ts *tx_ts;
+
+ /* take current head */
+ head = smp_load_acquire(&queue->tx_ts_head);
+ tail = queue->tx_ts_tail;
+
+ while (CIRC_CNT(head, tail, PTP_TS_BUFFER_SIZE)) {
+ tx_ts = &queue->tx_timestamps[tail];
+ gem_tstamp_tx(queue->bp, tx_ts->skb, &tx_ts->desc_ptp);
+ /* cleanup */
+ dev_kfree_skb_any(tx_ts->skb);
+ /* remove old tail */
+ smp_store_release(&queue->tx_ts_tail,
+ (tail + 1) & (PTP_TS_BUFFER_SIZE - 1));
+ tail = queue->tx_ts_tail;
+ }
+}
+
+void gem_ptp_init(struct net_device *dev)
+{
+ struct macb *bp = netdev_priv(dev);
+ struct macb_queue *queue;
+ unsigned int q;
+
+ bp->ptp_clock_info = gem_ptp_caps_template;
+
+ /* nominal frequency and maximum adjustment in ppb */
+ bp->tsu_rate = bp->ptp_info->get_tsu_rate(bp);
+ bp->ptp_clock_info.max_adj = bp->ptp_info->get_ptp_max_adj();
+ gem_ptp_init_timer(bp);
+ bp->ptp_clock = ptp_clock_register(&bp->ptp_clock_info, &dev->dev);
+ if (IS_ERR(bp->ptp_clock)) {
+ pr_err("ptp clock register failed: %ld\n",
+ PTR_ERR(bp->ptp_clock));
+ bp->ptp_clock = NULL;
+ return;
+ } else if (bp->ptp_clock == NULL) {
+ pr_err("ptp clock register failed\n");
+ return;
+ }
+
+ spin_lock_init(&bp->tsu_clk_lock);
+ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
+ queue->tx_ts_head = 0;
+ queue->tx_ts_tail = 0;
+ INIT_WORK(&queue->tx_ts_task, gem_tx_timestamp_flush);
+ }
+
+ gem_ptp_init_tsu(bp);
+
+ dev_info(&bp->pdev->dev, "%s ptp clock registered.\n",
+ GEM_PTP_TIMER_NAME);
+}
+
+void gem_ptp_remove(struct net_device *ndev)
+{
+ struct macb *bp = netdev_priv(ndev);
+
+ if (bp->ptp_clock)
+ ptp_clock_unregister(bp->ptp_clock);
+
+ gem_ptp_clear_timer(bp);
+
+ dev_info(&bp->pdev->dev, "%s ptp clock unregistered.\n",
+ GEM_PTP_TIMER_NAME);
+}
+
+static int gem_ptp_set_ts_mode(struct macb *bp,
+ enum macb_bd_control tx_bd_control,
+ enum macb_bd_control rx_bd_control)
+{
+ gem_writel(bp, TXBDCTRL, GEM_BF(TXTSMODE, tx_bd_control));
+ gem_writel(bp, RXBDCTRL, GEM_BF(RXTSMODE, rx_bd_control));
+
+ return 0;
+}
+
+int gem_get_hwtst(struct net_device *dev, struct ifreq *rq)
+{
+ struct hwtstamp_config *tstamp_config;
+ struct macb *bp = netdev_priv(dev);
+
+ tstamp_config = &bp->tstamp_config;
+ if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0)
+ return -EOPNOTSUPP;
+
+ if (copy_to_user(rq->ifr_data, tstamp_config, sizeof(*tstamp_config)))
+ return -EFAULT;
+ else
+ return 0;
+}
+
+static int gem_ptp_set_one_step_sync(struct macb *bp, u8 enable)
+{
+ u32 reg_val;
+
+ reg_val = macb_readl(bp, NCR);
+
+ if (enable)
+ macb_writel(bp, NCR, reg_val | MACB_BIT(OSSMODE));
+ else
+ macb_writel(bp, NCR, reg_val & ~MACB_BIT(OSSMODE));
+
+ return 0;
+}
+
+int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ enum macb_bd_control tx_bd_control = TSTAMP_DISABLED;
+ enum macb_bd_control rx_bd_control = TSTAMP_DISABLED;
+ struct hwtstamp_config *tstamp_config;
+ struct macb *bp = netdev_priv(dev);
+ u32 regval;
+
+ tstamp_config = &bp->tstamp_config;
+ if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(tstamp_config, ifr->ifr_data,
+ sizeof(*tstamp_config)))
+ return -EFAULT;
+
+ /* reserved for future extensions */
+ if (tstamp_config->flags)
+ return -EINVAL;
+
+ switch (tstamp_config->tx_type) {
+ case HWTSTAMP_TX_OFF:
+ break;
+ case HWTSTAMP_TX_ONESTEP_SYNC:
+ if (gem_ptp_set_one_step_sync(bp, 1) != 0)
+ return -ERANGE;
+ /* fall through */
+ case HWTSTAMP_TX_ON:
+ tx_bd_control = TSTAMP_ALL_FRAMES;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ switch (tstamp_config->rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+ break;
+ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+ rx_bd_control = TSTAMP_ALL_PTP_FRAMES;
+ tstamp_config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ regval = macb_readl(bp, NCR);
+ macb_writel(bp, NCR, (regval | MACB_BIT(SRTSM)));
+ break;
+ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+ case HWTSTAMP_FILTER_ALL:
+ rx_bd_control = TSTAMP_ALL_FRAMES;
+ tstamp_config->rx_filter = HWTSTAMP_FILTER_ALL;
+ break;
+ default:
+ tstamp_config->rx_filter = HWTSTAMP_FILTER_NONE;
+ return -ERANGE;
+ }
+
+ if (gem_ptp_set_ts_mode(bp, tx_bd_control, rx_bd_control) != 0)
+ return -ERANGE;
+
+ if (copy_to_user(ifr->ifr_data, tstamp_config, sizeof(*tstamp_config)))
+ return -EFAULT;
+ else
+ return 0;
+}
+