1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright 2010-2011 Calxeda, Inc. 4 */ 5#include <linux/module.h> 6#include <linux/mod_devicetable.h> 7#include <linux/kernel.h> 8#include <linux/circ_buf.h> 9#include <linux/interrupt.h> 10#include <linux/etherdevice.h> 11#include <linux/platform_device.h> 12#include <linux/skbuff.h> 13#include <linux/ethtool.h> 14#include <linux/if.h> 15#include <linux/crc32.h> 16#include <linux/dma-mapping.h> 17#include <linux/slab.h> 18 19/* XGMAC Register definitions */ 20#define XGMAC_CONTROL 0x00000000 /* MAC Configuration */ 21#define XGMAC_FRAME_FILTER 0x00000004 /* MAC Frame Filter */ 22#define XGMAC_FLOW_CTRL 0x00000018 /* MAC Flow Control */ 23#define XGMAC_VLAN_TAG 0x0000001C /* VLAN Tags */ 24#define XGMAC_VERSION 0x00000020 /* Version */ 25#define XGMAC_VLAN_INCL 0x00000024 /* VLAN tag for tx frames */ 26#define XGMAC_LPI_CTRL 0x00000028 /* LPI Control and Status */ 27#define XGMAC_LPI_TIMER 0x0000002C /* LPI Timers Control */ 28#define XGMAC_TX_PACE 0x00000030 /* Transmit Pace and Stretch */ 29#define XGMAC_VLAN_HASH 0x00000034 /* VLAN Hash Table */ 30#define XGMAC_DEBUG 0x00000038 /* Debug */ 31#define XGMAC_INT_STAT 0x0000003C /* Interrupt and Control */ 32#define XGMAC_ADDR_HIGH(reg) (0x00000040 + ((reg) * 8)) 33#define XGMAC_ADDR_LOW(reg) (0x00000044 + ((reg) * 8)) 34#define XGMAC_HASH(n) (0x00000300 + (n) * 4) /* HASH table regs */ 35#define XGMAC_NUM_HASH 16 36#define XGMAC_OMR 0x00000400 37#define XGMAC_REMOTE_WAKE 0x00000700 /* Remote Wake-Up Frm Filter */ 38#define XGMAC_PMT 0x00000704 /* PMT Control and Status */ 39#define XGMAC_MMC_CTRL 0x00000800 /* XGMAC MMC Control */ 40#define XGMAC_MMC_INTR_RX 0x00000804 /* Receive Interrupt */ 41#define XGMAC_MMC_INTR_TX 0x00000808 /* Transmit Interrupt */ 42#define XGMAC_MMC_INTR_MASK_RX 0x0000080c /* Receive Interrupt Mask */ 43#define XGMAC_MMC_INTR_MASK_TX 0x00000810 /* Transmit Interrupt Mask */ 44 45/* Hardware TX Statistics Counters */ 46#define XGMAC_MMC_TXOCTET_GB_LO 0x00000814 47#define XGMAC_MMC_TXOCTET_GB_HI 0x00000818 48#define XGMAC_MMC_TXFRAME_GB_LO 0x0000081C 49#define XGMAC_MMC_TXFRAME_GB_HI 0x00000820 50#define XGMAC_MMC_TXBCFRAME_G 0x00000824 51#define XGMAC_MMC_TXMCFRAME_G 0x0000082C 52#define XGMAC_MMC_TXUCFRAME_GB 0x00000864 53#define XGMAC_MMC_TXMCFRAME_GB 0x0000086C 54#define XGMAC_MMC_TXBCFRAME_GB 0x00000874 55#define XGMAC_MMC_TXUNDERFLOW 0x0000087C 56#define XGMAC_MMC_TXOCTET_G_LO 0x00000884 57#define XGMAC_MMC_TXOCTET_G_HI 0x00000888 58#define XGMAC_MMC_TXFRAME_G_LO 0x0000088C 59#define XGMAC_MMC_TXFRAME_G_HI 0x00000890 60#define XGMAC_MMC_TXPAUSEFRAME 0x00000894 61#define XGMAC_MMC_TXVLANFRAME 0x0000089C 62 63/* Hardware RX Statistics Counters */ 64#define XGMAC_MMC_RXFRAME_GB_LO 0x00000900 65#define XGMAC_MMC_RXFRAME_GB_HI 0x00000904 66#define XGMAC_MMC_RXOCTET_GB_LO 0x00000908 67#define XGMAC_MMC_RXOCTET_GB_HI 0x0000090C 68#define XGMAC_MMC_RXOCTET_G_LO 0x00000910 69#define XGMAC_MMC_RXOCTET_G_HI 0x00000914 70#define XGMAC_MMC_RXBCFRAME_G 0x00000918 71#define XGMAC_MMC_RXMCFRAME_G 0x00000920 72#define XGMAC_MMC_RXCRCERR 0x00000928 73#define XGMAC_MMC_RXRUNT 0x00000930 74#define XGMAC_MMC_RXJABBER 0x00000934 75#define XGMAC_MMC_RXUCFRAME_G 0x00000970 76#define XGMAC_MMC_RXLENGTHERR 0x00000978 77#define XGMAC_MMC_RXPAUSEFRAME 0x00000988 78#define XGMAC_MMC_RXOVERFLOW 0x00000990 79#define XGMAC_MMC_RXVLANFRAME 0x00000998 80#define XGMAC_MMC_RXWATCHDOG 0x000009a0 81 82/* DMA Control and Status Registers */ 83#define XGMAC_DMA_BUS_MODE 0x00000f00 /* Bus Mode */ 84#define XGMAC_DMA_TX_POLL 0x00000f04 /* Transmit Poll Demand */ 85#define XGMAC_DMA_RX_POLL 0x00000f08 /* Received Poll Demand */ 86#define XGMAC_DMA_RX_BASE_ADDR 0x00000f0c /* Receive List Base */ 87#define XGMAC_DMA_TX_BASE_ADDR 0x00000f10 /* Transmit List Base */ 88#define XGMAC_DMA_STATUS 0x00000f14 /* Status Register */ 89#define XGMAC_DMA_CONTROL 0x00000f18 /* Ctrl (Operational Mode) */ 90#define XGMAC_DMA_INTR_ENA 0x00000f1c /* Interrupt Enable */ 91#define XGMAC_DMA_MISS_FRAME_CTR 0x00000f20 /* Missed Frame Counter */ 92#define XGMAC_DMA_RI_WDOG_TIMER 0x00000f24 /* RX Intr Watchdog Timer */ 93#define XGMAC_DMA_AXI_BUS 0x00000f28 /* AXI Bus Mode */ 94#define XGMAC_DMA_AXI_STATUS 0x00000f2C /* AXI Status */ 95#define XGMAC_DMA_HW_FEATURE 0x00000f58 /* Enabled Hardware Features */ 96 97#define XGMAC_ADDR_AE 0x80000000 98 99/* PMT Control and Status */ 100#define XGMAC_PMT_POINTER_RESET 0x80000000 101#define XGMAC_PMT_GLBL_UNICAST 0x00000200 102#define XGMAC_PMT_WAKEUP_RX_FRM 0x00000040 103#define XGMAC_PMT_MAGIC_PKT 0x00000020 104#define XGMAC_PMT_WAKEUP_FRM_EN 0x00000004 105#define XGMAC_PMT_MAGIC_PKT_EN 0x00000002 106#define XGMAC_PMT_POWERDOWN 0x00000001 107 108#define XGMAC_CONTROL_SPD 0x40000000 /* Speed control */ 109#define XGMAC_CONTROL_SPD_MASK 0x60000000 110#define XGMAC_CONTROL_SPD_1G 0x60000000 111#define XGMAC_CONTROL_SPD_2_5G 0x40000000 112#define XGMAC_CONTROL_SPD_10G 0x00000000 113#define XGMAC_CONTROL_SARC 0x10000000 /* Source Addr Insert/Replace */ 114#define XGMAC_CONTROL_SARK_MASK 0x18000000 115#define XGMAC_CONTROL_CAR 0x04000000 /* CRC Addition/Replacement */ 116#define XGMAC_CONTROL_CAR_MASK 0x06000000 117#define XGMAC_CONTROL_DP 0x01000000 /* Disable Padding */ 118#define XGMAC_CONTROL_WD 0x00800000 /* Disable Watchdog on rx */ 119#define XGMAC_CONTROL_JD 0x00400000 /* Jabber disable */ 120#define XGMAC_CONTROL_JE 0x00100000 /* Jumbo frame */ 121#define XGMAC_CONTROL_LM 0x00001000 /* Loop-back mode */ 122#define XGMAC_CONTROL_IPC 0x00000400 /* Checksum Offload */ 123#define XGMAC_CONTROL_ACS 0x00000080 /* Automatic Pad/FCS Strip */ 124#define XGMAC_CONTROL_DDIC 0x00000010 /* Disable Deficit Idle Count */ 125#define XGMAC_CONTROL_TE 0x00000008 /* Transmitter Enable */ 126#define XGMAC_CONTROL_RE 0x00000004 /* Receiver Enable */ 127 128/* XGMAC Frame Filter defines */ 129#define XGMAC_FRAME_FILTER_PR 0x00000001 /* Promiscuous Mode */ 130#define XGMAC_FRAME_FILTER_HUC 0x00000002 /* Hash Unicast */ 131#define XGMAC_FRAME_FILTER_HMC 0x00000004 /* Hash Multicast */ 132#define XGMAC_FRAME_FILTER_DAIF 0x00000008 /* DA Inverse Filtering */ 133#define XGMAC_FRAME_FILTER_PM 0x00000010 /* Pass all multicast */ 134#define XGMAC_FRAME_FILTER_DBF 0x00000020 /* Disable Broadcast frames */ 135#define XGMAC_FRAME_FILTER_SAIF 0x00000100 /* Inverse Filtering */ 136#define XGMAC_FRAME_FILTER_SAF 0x00000200 /* Source Address Filter */ 137#define XGMAC_FRAME_FILTER_HPF 0x00000400 /* Hash or perfect Filter */ 138#define XGMAC_FRAME_FILTER_VHF 0x00000800 /* VLAN Hash Filter */ 139#define XGMAC_FRAME_FILTER_VPF 0x00001000 /* VLAN Perfect Filter */ 140#define XGMAC_FRAME_FILTER_RA 0x80000000 /* Receive all mode */ 141 142/* XGMAC FLOW CTRL defines */ 143#define XGMAC_FLOW_CTRL_PT_MASK 0xffff0000 /* Pause Time Mask */ 144#define XGMAC_FLOW_CTRL_PT_SHIFT 16 145#define XGMAC_FLOW_CTRL_DZQP 0x00000080 /* Disable Zero-Quanta Phase */ 146#define XGMAC_FLOW_CTRL_PLT 0x00000020 /* Pause Low Threshold */ 147#define XGMAC_FLOW_CTRL_PLT_MASK 0x00000030 /* PLT MASK */ 148#define XGMAC_FLOW_CTRL_UP 0x00000008 /* Unicast Pause Frame Detect */ 149#define XGMAC_FLOW_CTRL_RFE 0x00000004 /* Rx Flow Control Enable */ 150#define XGMAC_FLOW_CTRL_TFE 0x00000002 /* Tx Flow Control Enable */ 151#define XGMAC_FLOW_CTRL_FCB_BPA 0x00000001 /* Flow Control Busy ... */ 152 153/* XGMAC_INT_STAT reg */ 154#define XGMAC_INT_STAT_PMTIM 0x00800000 /* PMT Interrupt Mask */ 155#define XGMAC_INT_STAT_PMT 0x0080 /* PMT Interrupt Status */ 156#define XGMAC_INT_STAT_LPI 0x0040 /* LPI Interrupt Status */ 157 158/* DMA Bus Mode register defines */ 159#define DMA_BUS_MODE_SFT_RESET 0x00000001 /* Software Reset */ 160#define DMA_BUS_MODE_DSL_MASK 0x0000007c /* Descriptor Skip Length */ 161#define DMA_BUS_MODE_DSL_SHIFT 2 /* (in DWORDS) */ 162#define DMA_BUS_MODE_ATDS 0x00000080 /* Alternate Descriptor Size */ 163 164/* Programmable burst length */ 165#define DMA_BUS_MODE_PBL_MASK 0x00003f00 /* Programmable Burst Len */ 166#define DMA_BUS_MODE_PBL_SHIFT 8 167#define DMA_BUS_MODE_FB 0x00010000 /* Fixed burst */ 168#define DMA_BUS_MODE_RPBL_MASK 0x003e0000 /* Rx-Programmable Burst Len */ 169#define DMA_BUS_MODE_RPBL_SHIFT 17 170#define DMA_BUS_MODE_USP 0x00800000 171#define DMA_BUS_MODE_8PBL 0x01000000 172#define DMA_BUS_MODE_AAL 0x02000000 173 174/* DMA Bus Mode register defines */ 175#define DMA_BUS_PR_RATIO_MASK 0x0000c000 /* Rx/Tx priority ratio */ 176#define DMA_BUS_PR_RATIO_SHIFT 14 177#define DMA_BUS_FB 0x00010000 /* Fixed Burst */ 178 179/* DMA Control register defines */ 180#define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */ 181#define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */ 182#define DMA_CONTROL_DFF 0x01000000 /* Disable flush of rx frames */ 183#define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */ 184 185/* DMA Normal interrupt */ 186#define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */ 187#define DMA_INTR_ENA_AIE 0x00008000 /* Abnormal Summary */ 188#define DMA_INTR_ENA_ERE 0x00004000 /* Early Receive */ 189#define DMA_INTR_ENA_FBE 0x00002000 /* Fatal Bus Error */ 190#define DMA_INTR_ENA_ETE 0x00000400 /* Early Transmit */ 191#define DMA_INTR_ENA_RWE 0x00000200 /* Receive Watchdog */ 192#define DMA_INTR_ENA_RSE 0x00000100 /* Receive Stopped */ 193#define DMA_INTR_ENA_RUE 0x00000080 /* Receive Buffer Unavailable */ 194#define DMA_INTR_ENA_RIE 0x00000040 /* Receive Interrupt */ 195#define DMA_INTR_ENA_UNE 0x00000020 /* Tx Underflow */ 196#define DMA_INTR_ENA_OVE 0x00000010 /* Receive Overflow */ 197#define DMA_INTR_ENA_TJE 0x00000008 /* Transmit Jabber */ 198#define DMA_INTR_ENA_TUE 0x00000004 /* Transmit Buffer Unavail */ 199#define DMA_INTR_ENA_TSE 0x00000002 /* Transmit Stopped */ 200#define DMA_INTR_ENA_TIE 0x00000001 /* Transmit Interrupt */ 201 202#define DMA_INTR_NORMAL (DMA_INTR_ENA_NIE | DMA_INTR_ENA_RIE | \ 203 DMA_INTR_ENA_TUE | DMA_INTR_ENA_TIE) 204 205#define DMA_INTR_ABNORMAL (DMA_INTR_ENA_AIE | DMA_INTR_ENA_FBE | \ 206 DMA_INTR_ENA_RWE | DMA_INTR_ENA_RSE | \ 207 DMA_INTR_ENA_RUE | DMA_INTR_ENA_UNE | \ 208 DMA_INTR_ENA_OVE | DMA_INTR_ENA_TJE | \ 209 DMA_INTR_ENA_TSE) 210 211/* DMA default interrupt mask */ 212#define DMA_INTR_DEFAULT_MASK (DMA_INTR_NORMAL | DMA_INTR_ABNORMAL) 213 214/* DMA Status register defines */ 215#define DMA_STATUS_GMI 0x08000000 /* MMC interrupt */ 216#define DMA_STATUS_GLI 0x04000000 /* GMAC Line interface int */ 217#define DMA_STATUS_EB_MASK 0x00380000 /* Error Bits Mask */ 218#define DMA_STATUS_EB_TX_ABORT 0x00080000 /* Error Bits - TX Abort */ 219#define DMA_STATUS_EB_RX_ABORT 0x00100000 /* Error Bits - RX Abort */ 220#define DMA_STATUS_TS_MASK 0x00700000 /* Transmit Process State */ 221#define DMA_STATUS_TS_SHIFT 20 222#define DMA_STATUS_RS_MASK 0x000e0000 /* Receive Process State */ 223#define DMA_STATUS_RS_SHIFT 17 224#define DMA_STATUS_NIS 0x00010000 /* Normal Interrupt Summary */ 225#define DMA_STATUS_AIS 0x00008000 /* Abnormal Interrupt Summary */ 226#define DMA_STATUS_ERI 0x00004000 /* Early Receive Interrupt */ 227#define DMA_STATUS_FBI 0x00002000 /* Fatal Bus Error Interrupt */ 228#define DMA_STATUS_ETI 0x00000400 /* Early Transmit Interrupt */ 229#define DMA_STATUS_RWT 0x00000200 /* Receive Watchdog Timeout */ 230#define DMA_STATUS_RPS 0x00000100 /* Receive Process Stopped */ 231#define DMA_STATUS_RU 0x00000080 /* Receive Buffer Unavailable */ 232#define DMA_STATUS_RI 0x00000040 /* Receive Interrupt */ 233#define DMA_STATUS_UNF 0x00000020 /* Transmit Underflow */ 234#define DMA_STATUS_OVF 0x00000010 /* Receive Overflow */ 235#define DMA_STATUS_TJT 0x00000008 /* Transmit Jabber Timeout */ 236#define DMA_STATUS_TU 0x00000004 /* Transmit Buffer Unavail */ 237#define DMA_STATUS_TPS 0x00000002 /* Transmit Process Stopped */ 238#define DMA_STATUS_TI 0x00000001 /* Transmit Interrupt */ 239 240/* Common MAC defines */ 241#define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */ 242#define MAC_ENABLE_RX 0x00000004 /* Receiver Enable */ 243 244/* XGMAC Operation Mode Register */ 245#define XGMAC_OMR_TSF 0x00200000 /* TX FIFO Store and Forward */ 246#define XGMAC_OMR_FTF 0x00100000 /* Flush Transmit FIFO */ 247#define XGMAC_OMR_TTC 0x00020000 /* Transmit Threshold Ctrl */ 248#define XGMAC_OMR_TTC_MASK 0x00030000 249#define XGMAC_OMR_RFD 0x00006000 /* FC Deactivation Threshold */ 250#define XGMAC_OMR_RFD_MASK 0x00007000 /* FC Deact Threshold MASK */ 251#define XGMAC_OMR_RFA 0x00000600 /* FC Activation Threshold */ 252#define XGMAC_OMR_RFA_MASK 0x00000E00 /* FC Act Threshold MASK */ 253#define XGMAC_OMR_EFC 0x00000100 /* Enable Hardware FC */ 254#define XGMAC_OMR_FEF 0x00000080 /* Forward Error Frames */ 255#define XGMAC_OMR_DT 0x00000040 /* Drop TCP/IP csum Errors */ 256#define XGMAC_OMR_RSF 0x00000020 /* RX FIFO Store and Forward */ 257#define XGMAC_OMR_RTC_256 0x00000018 /* RX Threshold Ctrl */ 258#define XGMAC_OMR_RTC_MASK 0x00000018 /* RX Threshold Ctrl MASK */ 259 260/* XGMAC HW Features Register */ 261#define DMA_HW_FEAT_TXCOESEL 0x00010000 /* TX Checksum offload */ 262 263#define XGMAC_MMC_CTRL_CNT_FRZ 0x00000008 264 265/* XGMAC Descriptor Defines */ 266#define MAX_DESC_BUF_SZ (0x2000 - 8) 267 268#define RXDESC_EXT_STATUS 0x00000001 269#define RXDESC_CRC_ERR 0x00000002 270#define RXDESC_RX_ERR 0x00000008 271#define RXDESC_RX_WDOG 0x00000010 272#define RXDESC_FRAME_TYPE 0x00000020 273#define RXDESC_GIANT_FRAME 0x00000080 274#define RXDESC_LAST_SEG 0x00000100 275#define RXDESC_FIRST_SEG 0x00000200 276#define RXDESC_VLAN_FRAME 0x00000400 277#define RXDESC_OVERFLOW_ERR 0x00000800 278#define RXDESC_LENGTH_ERR 0x00001000 279#define RXDESC_SA_FILTER_FAIL 0x00002000 280#define RXDESC_DESCRIPTOR_ERR 0x00004000 281#define RXDESC_ERROR_SUMMARY 0x00008000 282#define RXDESC_FRAME_LEN_OFFSET 16 283#define RXDESC_FRAME_LEN_MASK 0x3fff0000 284#define RXDESC_DA_FILTER_FAIL 0x40000000 285 286#define RXDESC1_END_RING 0x00008000 287 288#define RXDESC_IP_PAYLOAD_MASK 0x00000003 289#define RXDESC_IP_PAYLOAD_UDP 0x00000001 290#define RXDESC_IP_PAYLOAD_TCP 0x00000002 291#define RXDESC_IP_PAYLOAD_ICMP 0x00000003 292#define RXDESC_IP_HEADER_ERR 0x00000008 293#define RXDESC_IP_PAYLOAD_ERR 0x00000010 294#define RXDESC_IPV4_PACKET 0x00000040 295#define RXDESC_IPV6_PACKET 0x00000080 296#define TXDESC_UNDERFLOW_ERR 0x00000001 297#define TXDESC_JABBER_TIMEOUT 0x00000002 298#define TXDESC_LOCAL_FAULT 0x00000004 299#define TXDESC_REMOTE_FAULT 0x00000008 300#define TXDESC_VLAN_FRAME 0x00000010 301#define TXDESC_FRAME_FLUSHED 0x00000020 302#define TXDESC_IP_HEADER_ERR 0x00000040 303#define TXDESC_PAYLOAD_CSUM_ERR 0x00000080 304#define TXDESC_ERROR_SUMMARY 0x00008000 305#define TXDESC_SA_CTRL_INSERT 0x00040000 306#define TXDESC_SA_CTRL_REPLACE 0x00080000 307#define TXDESC_2ND_ADDR_CHAINED 0x00100000 308#define TXDESC_END_RING 0x00200000 309#define TXDESC_CSUM_IP 0x00400000 310#define TXDESC_CSUM_IP_PAYLD 0x00800000 311#define TXDESC_CSUM_ALL 0x00C00000 312#define TXDESC_CRC_EN_REPLACE 0x01000000 313#define TXDESC_CRC_EN_APPEND 0x02000000 314#define TXDESC_DISABLE_PAD 0x04000000 315#define TXDESC_FIRST_SEG 0x10000000 316#define TXDESC_LAST_SEG 0x20000000 317#define TXDESC_INTERRUPT 0x40000000 318 319#define DESC_OWN 0x80000000 320#define DESC_BUFFER1_SZ_MASK 0x00001fff 321#define DESC_BUFFER2_SZ_MASK 0x1fff0000 322#define DESC_BUFFER2_SZ_OFFSET 16 323 324struct xgmac_dma_desc { 325 __le32 flags; 326 __le32 buf_size; 327 __le32 buf1_addr; /* Buffer 1 Address Pointer */ 328 __le32 buf2_addr; /* Buffer 2 Address Pointer */ 329 __le32 ext_status; 330 __le32 res[3]; 331}; 332 333struct xgmac_extra_stats { 334 /* Transmit errors */ 335 unsigned long tx_jabber; 336 unsigned long tx_frame_flushed; 337 unsigned long tx_payload_error; 338 unsigned long tx_ip_header_error; 339 unsigned long tx_local_fault; 340 unsigned long tx_remote_fault; 341 /* Receive errors */ 342 unsigned long rx_watchdog; 343 unsigned long rx_da_filter_fail; 344 unsigned long rx_payload_error; 345 unsigned long rx_ip_header_error; 346 /* Tx/Rx IRQ errors */ 347 unsigned long tx_process_stopped; 348 unsigned long rx_buf_unav; 349 unsigned long rx_process_stopped; 350 unsigned long tx_early; 351 unsigned long fatal_bus_error; 352}; 353 354struct xgmac_priv { 355 struct xgmac_dma_desc *dma_rx; 356 struct sk_buff **rx_skbuff; 357 unsigned int rx_tail; 358 unsigned int rx_head; 359 360 struct xgmac_dma_desc *dma_tx; 361 struct sk_buff **tx_skbuff; 362 unsigned int tx_head; 363 unsigned int tx_tail; 364 int tx_irq_cnt; 365 366 void __iomem *base; 367 unsigned int dma_buf_sz; 368 dma_addr_t dma_rx_phy; 369 dma_addr_t dma_tx_phy; 370 371 struct net_device *dev; 372 struct device *device; 373 struct napi_struct napi; 374 375 int max_macs; 376 struct xgmac_extra_stats xstats; 377 378 spinlock_t stats_lock; 379 int pmt_irq; 380 char rx_pause; 381 char tx_pause; 382 int wolopts; 383 struct work_struct tx_timeout_work; 384}; 385 386/* XGMAC Configuration Settings */ 387#define XGMAC_MAX_MTU 9000 388#define PAUSE_TIME 0x400 389 390#define DMA_RX_RING_SZ 256 391#define DMA_TX_RING_SZ 128 392/* minimum number of free TX descriptors required to wake up TX process */ 393#define TX_THRESH (DMA_TX_RING_SZ/4) 394 395/* DMA descriptor ring helpers */ 396#define dma_ring_incr(n, s) (((n) + 1) & ((s) - 1)) 397#define dma_ring_space(h, t, s) CIRC_SPACE(h, t, s) 398#define dma_ring_cnt(h, t, s) CIRC_CNT(h, t, s) 399 400#define tx_dma_ring_space(p) \ 401 dma_ring_space((p)->tx_head, (p)->tx_tail, DMA_TX_RING_SZ) 402 403/* XGMAC Descriptor Access Helpers */ 404static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz) 405{ 406 if (buf_sz > MAX_DESC_BUF_SZ) 407 p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ | 408 (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET); 409 else 410 p->buf_size = cpu_to_le32(buf_sz); 411} 412 413static inline int desc_get_buf_len(struct xgmac_dma_desc *p) 414{ 415 u32 len = le32_to_cpu(p->buf_size); 416 return (len & DESC_BUFFER1_SZ_MASK) + 417 ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET); 418} 419 420static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size, 421 int buf_sz) 422{ 423 struct xgmac_dma_desc *end = p + ring_size - 1; 424 425 memset(p, 0, sizeof(*p) * ring_size); 426 427 for (; p <= end; p++) 428 desc_set_buf_len(p, buf_sz); 429 430 end->buf_size |= cpu_to_le32(RXDESC1_END_RING); 431} 432 433static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size) 434{ 435 memset(p, 0, sizeof(*p) * ring_size); 436 p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING); 437} 438 439static inline int desc_get_owner(struct xgmac_dma_desc *p) 440{ 441 return le32_to_cpu(p->flags) & DESC_OWN; 442} 443 444static inline void desc_set_rx_owner(struct xgmac_dma_desc *p) 445{ 446 /* Clear all fields and set the owner */ 447 p->flags = cpu_to_le32(DESC_OWN); 448} 449 450static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags) 451{ 452 u32 tmpflags = le32_to_cpu(p->flags); 453 tmpflags &= TXDESC_END_RING; 454 tmpflags |= flags | DESC_OWN; 455 p->flags = cpu_to_le32(tmpflags); 456} 457 458static inline void desc_clear_tx_owner(struct xgmac_dma_desc *p) 459{ 460 u32 tmpflags = le32_to_cpu(p->flags); 461 tmpflags &= TXDESC_END_RING; 462 p->flags = cpu_to_le32(tmpflags); 463} 464 465static inline int desc_get_tx_ls(struct xgmac_dma_desc *p) 466{ 467 return le32_to_cpu(p->flags) & TXDESC_LAST_SEG; 468} 469 470static inline int desc_get_tx_fs(struct xgmac_dma_desc *p) 471{ 472 return le32_to_cpu(p->flags) & TXDESC_FIRST_SEG; 473} 474 475static inline u32 desc_get_buf_addr(struct xgmac_dma_desc *p) 476{ 477 return le32_to_cpu(p->buf1_addr); 478} 479 480static inline void desc_set_buf_addr(struct xgmac_dma_desc *p, 481 u32 paddr, int len) 482{ 483 p->buf1_addr = cpu_to_le32(paddr); 484 if (len > MAX_DESC_BUF_SZ) 485 p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ); 486} 487 488static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p, 489 u32 paddr, int len) 490{ 491 desc_set_buf_len(p, len); 492 desc_set_buf_addr(p, paddr, len); 493} 494 495static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p) 496{ 497 u32 data = le32_to_cpu(p->flags); 498 u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET; 499 if (data & RXDESC_FRAME_TYPE) 500 len -= ETH_FCS_LEN; 501 502 return len; 503} 504 505static void xgmac_dma_flush_tx_fifo(void __iomem *ioaddr) 506{ 507 int timeout = 1000; 508 u32 reg = readl(ioaddr + XGMAC_OMR); 509 writel(reg | XGMAC_OMR_FTF, ioaddr + XGMAC_OMR); 510 511 while ((timeout-- > 0) && readl(ioaddr + XGMAC_OMR) & XGMAC_OMR_FTF) 512 udelay(1); 513} 514 515static int desc_get_tx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p) 516{ 517 struct xgmac_extra_stats *x = &priv->xstats; 518 u32 status = le32_to_cpu(p->flags); 519 520 if (!(status & TXDESC_ERROR_SUMMARY)) 521 return 0; 522 523 netdev_dbg(priv->dev, "tx desc error = 0x%08x\n", status); 524 if (status & TXDESC_JABBER_TIMEOUT) 525 x->tx_jabber++; 526 if (status & TXDESC_FRAME_FLUSHED) 527 x->tx_frame_flushed++; 528 if (status & TXDESC_UNDERFLOW_ERR) 529 xgmac_dma_flush_tx_fifo(priv->base); 530 if (status & TXDESC_IP_HEADER_ERR) 531 x->tx_ip_header_error++; 532 if (status & TXDESC_LOCAL_FAULT) 533 x->tx_local_fault++; 534 if (status & TXDESC_REMOTE_FAULT) 535 x->tx_remote_fault++; 536 if (status & TXDESC_PAYLOAD_CSUM_ERR) 537 x->tx_payload_error++; 538 539 return -1; 540} 541 542static int desc_get_rx_status(struct xgmac_priv *priv, struct xgmac_dma_desc *p) 543{ 544 struct xgmac_extra_stats *x = &priv->xstats; 545 int ret = CHECKSUM_UNNECESSARY; 546 u32 status = le32_to_cpu(p->flags); 547 u32 ext_status = le32_to_cpu(p->ext_status); 548 549 if (status & RXDESC_DA_FILTER_FAIL) { 550 netdev_dbg(priv->dev, "XGMAC RX : Dest Address filter fail\n"); 551 x->rx_da_filter_fail++; 552 return -1; 553 } 554 555 /* All frames should fit into a single buffer */ 556 if (!(status & RXDESC_FIRST_SEG) || !(status & RXDESC_LAST_SEG)) 557 return -1; 558 559 /* Check if packet has checksum already */ 560 if ((status & RXDESC_FRAME_TYPE) && (status & RXDESC_EXT_STATUS) && 561 !(ext_status & RXDESC_IP_PAYLOAD_MASK)) 562 ret = CHECKSUM_NONE; 563 564 netdev_dbg(priv->dev, "rx status - frame type=%d, csum = %d, ext stat %08x\n", 565 (status & RXDESC_FRAME_TYPE) ? 1 : 0, ret, ext_status); 566 567 if (!(status & RXDESC_ERROR_SUMMARY)) 568 return ret; 569 570 /* Handle any errors */ 571 if (status & (RXDESC_DESCRIPTOR_ERR | RXDESC_OVERFLOW_ERR | 572 RXDESC_GIANT_FRAME | RXDESC_LENGTH_ERR | RXDESC_CRC_ERR)) 573 return -1; 574 575 if (status & RXDESC_EXT_STATUS) { 576 if (ext_status & RXDESC_IP_HEADER_ERR) 577 x->rx_ip_header_error++; 578 if (ext_status & RXDESC_IP_PAYLOAD_ERR) 579 x->rx_payload_error++; 580 netdev_dbg(priv->dev, "IP checksum error - stat %08x\n", 581 ext_status); 582 return CHECKSUM_NONE; 583 } 584 585 return ret; 586} 587 588static inline void xgmac_mac_enable(void __iomem *ioaddr) 589{ 590 u32 value = readl(ioaddr + XGMAC_CONTROL); 591 value |= MAC_ENABLE_RX | MAC_ENABLE_TX; 592 writel(value, ioaddr + XGMAC_CONTROL); 593 594 value = readl(ioaddr + XGMAC_DMA_CONTROL); 595 value |= DMA_CONTROL_ST | DMA_CONTROL_SR; 596 writel(value, ioaddr + XGMAC_DMA_CONTROL); 597} 598 599static inline void xgmac_mac_disable(void __iomem *ioaddr) 600{ 601 u32 value = readl(ioaddr + XGMAC_DMA_CONTROL); 602 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR); 603 writel(value, ioaddr + XGMAC_DMA_CONTROL); 604 605 value = readl(ioaddr + XGMAC_CONTROL); 606 value &= ~(MAC_ENABLE_TX | MAC_ENABLE_RX); 607 writel(value, ioaddr + XGMAC_CONTROL); 608} 609 610static void xgmac_set_mac_addr(void __iomem *ioaddr, const unsigned char *addr, 611 int num) 612{ 613 u32 data; 614 615 if (addr) { 616 data = (addr[5] << 8) | addr[4] | (num ? XGMAC_ADDR_AE : 0); 617 writel(data, ioaddr + XGMAC_ADDR_HIGH(num)); 618 data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; 619 writel(data, ioaddr + XGMAC_ADDR_LOW(num)); 620 } else { 621 writel(0, ioaddr + XGMAC_ADDR_HIGH(num)); 622 writel(0, ioaddr + XGMAC_ADDR_LOW(num)); 623 } 624} 625 626static void xgmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr, 627 int num) 628{ 629 u32 hi_addr, lo_addr; 630 631 /* Read the MAC address from the hardware */ 632 hi_addr = readl(ioaddr + XGMAC_ADDR_HIGH(num)); 633 lo_addr = readl(ioaddr + XGMAC_ADDR_LOW(num)); 634 635 /* Extract the MAC address from the high and low words */ 636 addr[0] = lo_addr & 0xff; 637 addr[1] = (lo_addr >> 8) & 0xff; 638 addr[2] = (lo_addr >> 16) & 0xff; 639 addr[3] = (lo_addr >> 24) & 0xff; 640 addr[4] = hi_addr & 0xff; 641 addr[5] = (hi_addr >> 8) & 0xff; 642} 643 644static int xgmac_set_flow_ctrl(struct xgmac_priv *priv, int rx, int tx) 645{ 646 u32 reg; 647 unsigned int flow = 0; 648 649 priv->rx_pause = rx; 650 priv->tx_pause = tx; 651 652 if (rx || tx) { 653 if (rx) 654 flow |= XGMAC_FLOW_CTRL_RFE; 655 if (tx) 656 flow |= XGMAC_FLOW_CTRL_TFE; 657 658 flow |= XGMAC_FLOW_CTRL_PLT | XGMAC_FLOW_CTRL_UP; 659 flow |= (PAUSE_TIME << XGMAC_FLOW_CTRL_PT_SHIFT); 660 661 writel(flow, priv->base + XGMAC_FLOW_CTRL); 662 663 reg = readl(priv->base + XGMAC_OMR); 664 reg |= XGMAC_OMR_EFC; 665 writel(reg, priv->base + XGMAC_OMR); 666 } else { 667 writel(0, priv->base + XGMAC_FLOW_CTRL); 668 669 reg = readl(priv->base + XGMAC_OMR); 670 reg &= ~XGMAC_OMR_EFC; 671 writel(reg, priv->base + XGMAC_OMR); 672 } 673 674 return 0; 675} 676 677static void xgmac_rx_refill(struct xgmac_priv *priv) 678{ 679 struct xgmac_dma_desc *p; 680 dma_addr_t paddr; 681 int bufsz = priv->dev->mtu + ETH_HLEN + ETH_FCS_LEN; 682 683 while (dma_ring_space(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ) > 1) { 684 int entry = priv->rx_head; 685 struct sk_buff *skb; 686 687 p = priv->dma_rx + entry; 688 689 if (priv->rx_skbuff[entry] == NULL) { 690 skb = netdev_alloc_skb_ip_align(priv->dev, bufsz); 691 if (unlikely(skb == NULL)) 692 break; 693 694 paddr = dma_map_single(priv->device, skb->data, 695 priv->dma_buf_sz - NET_IP_ALIGN, 696 DMA_FROM_DEVICE); 697 if (dma_mapping_error(priv->device, paddr)) { 698 dev_kfree_skb_any(skb); 699 break; 700 } 701 priv->rx_skbuff[entry] = skb; 702 desc_set_buf_addr(p, paddr, priv->dma_buf_sz); 703 } 704 705 netdev_dbg(priv->dev, "rx ring: head %d, tail %d\n", 706 priv->rx_head, priv->rx_tail); 707 708 priv->rx_head = dma_ring_incr(priv->rx_head, DMA_RX_RING_SZ); 709 desc_set_rx_owner(p); 710 } 711} 712 713/** 714 * xgmac_dma_desc_rings_init - init the RX/TX descriptor rings 715 * @dev: net device structure 716 * Description: this function initializes the DMA RX/TX descriptors 717 * and allocates the socket buffers. 718 */ 719static int xgmac_dma_desc_rings_init(struct net_device *dev) 720{ 721 struct xgmac_priv *priv = netdev_priv(dev); 722 unsigned int bfsize; 723 724 /* Set the Buffer size according to the MTU; 725 * The total buffer size including any IP offset must be a multiple 726 * of 8 bytes. 727 */ 728 bfsize = ALIGN(dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN, 8); 729 730 netdev_dbg(priv->dev, "mtu [%d] bfsize [%d]\n", dev->mtu, bfsize); 731 732 priv->rx_skbuff = kcalloc(DMA_RX_RING_SZ, sizeof(struct sk_buff *), 733 GFP_KERNEL); 734 if (!priv->rx_skbuff) 735 return -ENOMEM; 736 737 priv->dma_rx = dma_alloc_coherent(priv->device, 738 DMA_RX_RING_SZ * 739 sizeof(struct xgmac_dma_desc), 740 &priv->dma_rx_phy, 741 GFP_KERNEL); 742 if (!priv->dma_rx) 743 goto err_dma_rx; 744 745 priv->tx_skbuff = kcalloc(DMA_TX_RING_SZ, sizeof(struct sk_buff *), 746 GFP_KERNEL); 747 if (!priv->tx_skbuff) 748 goto err_tx_skb; 749 750 priv->dma_tx = dma_alloc_coherent(priv->device, 751 DMA_TX_RING_SZ * 752 sizeof(struct xgmac_dma_desc), 753 &priv->dma_tx_phy, 754 GFP_KERNEL); 755 if (!priv->dma_tx) 756 goto err_dma_tx; 757 758 netdev_dbg(priv->dev, "DMA desc rings: virt addr (Rx %p, " 759 "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n", 760 priv->dma_rx, priv->dma_tx, 761 (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy); 762 763 priv->rx_tail = 0; 764 priv->rx_head = 0; 765 priv->dma_buf_sz = bfsize; 766 desc_init_rx_desc(priv->dma_rx, DMA_RX_RING_SZ, priv->dma_buf_sz); 767 xgmac_rx_refill(priv); 768 769 priv->tx_tail = 0; 770 priv->tx_head = 0; 771 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ); 772 773 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR); 774 writel(priv->dma_rx_phy, priv->base + XGMAC_DMA_RX_BASE_ADDR); 775 776 return 0; 777 778err_dma_tx: 779 kfree(priv->tx_skbuff); 780err_tx_skb: 781 dma_free_coherent(priv->device, 782 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc), 783 priv->dma_rx, priv->dma_rx_phy); 784err_dma_rx: 785 kfree(priv->rx_skbuff); 786 return -ENOMEM; 787} 788 789static void xgmac_free_rx_skbufs(struct xgmac_priv *priv) 790{ 791 int i; 792 struct xgmac_dma_desc *p; 793 794 if (!priv->rx_skbuff) 795 return; 796 797 for (i = 0; i < DMA_RX_RING_SZ; i++) { 798 struct sk_buff *skb = priv->rx_skbuff[i]; 799 if (skb == NULL) 800 continue; 801 802 p = priv->dma_rx + i; 803 dma_unmap_single(priv->device, desc_get_buf_addr(p), 804 priv->dma_buf_sz - NET_IP_ALIGN, DMA_FROM_DEVICE); 805 dev_kfree_skb_any(skb); 806 priv->rx_skbuff[i] = NULL; 807 } 808} 809 810static void xgmac_free_tx_skbufs(struct xgmac_priv *priv) 811{ 812 int i; 813 struct xgmac_dma_desc *p; 814 815 if (!priv->tx_skbuff) 816 return; 817 818 for (i = 0; i < DMA_TX_RING_SZ; i++) { 819 if (priv->tx_skbuff[i] == NULL) 820 continue; 821 822 p = priv->dma_tx + i; 823 if (desc_get_tx_fs(p)) 824 dma_unmap_single(priv->device, desc_get_buf_addr(p), 825 desc_get_buf_len(p), DMA_TO_DEVICE); 826 else 827 dma_unmap_page(priv->device, desc_get_buf_addr(p), 828 desc_get_buf_len(p), DMA_TO_DEVICE); 829 830 if (desc_get_tx_ls(p)) 831 dev_kfree_skb_any(priv->tx_skbuff[i]); 832 priv->tx_skbuff[i] = NULL; 833 } 834} 835 836static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv) 837{ 838 /* Release the DMA TX/RX socket buffers */ 839 xgmac_free_rx_skbufs(priv); 840 xgmac_free_tx_skbufs(priv); 841 842 /* Free the consistent memory allocated for descriptor rings */ 843 if (priv->dma_tx) { 844 dma_free_coherent(priv->device, 845 DMA_TX_RING_SZ * sizeof(struct xgmac_dma_desc), 846 priv->dma_tx, priv->dma_tx_phy); 847 priv->dma_tx = NULL; 848 } 849 if (priv->dma_rx) { 850 dma_free_coherent(priv->device, 851 DMA_RX_RING_SZ * sizeof(struct xgmac_dma_desc), 852 priv->dma_rx, priv->dma_rx_phy); 853 priv->dma_rx = NULL; 854 } 855 kfree(priv->rx_skbuff); 856 priv->rx_skbuff = NULL; 857 kfree(priv->tx_skbuff); 858 priv->tx_skbuff = NULL; 859} 860 861/** 862 * xgmac_tx_complete: 863 * @priv: private driver structure 864 * Description: it reclaims resources after transmission completes. 865 */ 866static void xgmac_tx_complete(struct xgmac_priv *priv) 867{ 868 while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) { 869 unsigned int entry = priv->tx_tail; 870 struct sk_buff *skb = priv->tx_skbuff[entry]; 871 struct xgmac_dma_desc *p = priv->dma_tx + entry; 872 873 /* Check if the descriptor is owned by the DMA. */ 874 if (desc_get_owner(p)) 875 break; 876 877 netdev_dbg(priv->dev, "tx ring: curr %d, dirty %d\n", 878 priv->tx_head, priv->tx_tail); 879 880 if (desc_get_tx_fs(p)) 881 dma_unmap_single(priv->device, desc_get_buf_addr(p), 882 desc_get_buf_len(p), DMA_TO_DEVICE); 883 else 884 dma_unmap_page(priv->device, desc_get_buf_addr(p), 885 desc_get_buf_len(p), DMA_TO_DEVICE); 886 887 /* Check tx error on the last segment */ 888 if (desc_get_tx_ls(p)) { 889 desc_get_tx_status(priv, p); 890 dev_consume_skb_any(skb); 891 } 892 893 priv->tx_skbuff[entry] = NULL; 894 priv->tx_tail = dma_ring_incr(entry, DMA_TX_RING_SZ); 895 } 896 897 /* Ensure tx_tail is visible to xgmac_xmit */ 898 smp_mb(); 899 if (unlikely(netif_queue_stopped(priv->dev) && 900 (tx_dma_ring_space(priv) > MAX_SKB_FRAGS))) 901 netif_wake_queue(priv->dev); 902} 903 904static void xgmac_tx_timeout_work(struct work_struct *work) 905{ 906 u32 reg, value; 907 struct xgmac_priv *priv = 908 container_of(work, struct xgmac_priv, tx_timeout_work); 909 910 napi_disable(&priv->napi); 911 912 writel(0, priv->base + XGMAC_DMA_INTR_ENA); 913 914 netif_tx_lock(priv->dev); 915 916 reg = readl(priv->base + XGMAC_DMA_CONTROL); 917 writel(reg & ~DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL); 918 do { 919 value = readl(priv->base + XGMAC_DMA_STATUS) & 0x700000; 920 } while (value && (value != 0x600000)); 921 922 xgmac_free_tx_skbufs(priv); 923 desc_init_tx_desc(priv->dma_tx, DMA_TX_RING_SZ); 924 priv->tx_tail = 0; 925 priv->tx_head = 0; 926 writel(priv->dma_tx_phy, priv->base + XGMAC_DMA_TX_BASE_ADDR); 927 writel(reg | DMA_CONTROL_ST, priv->base + XGMAC_DMA_CONTROL); 928 929 writel(DMA_STATUS_TU | DMA_STATUS_TPS | DMA_STATUS_NIS | DMA_STATUS_AIS, 930 priv->base + XGMAC_DMA_STATUS); 931 932 netif_tx_unlock(priv->dev); 933 netif_wake_queue(priv->dev); 934 935 napi_enable(&priv->napi); 936 937 /* Enable interrupts */ 938 writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_STATUS); 939 writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA); 940} 941 942static int xgmac_hw_init(struct net_device *dev) 943{ 944 u32 value, ctrl; 945 int limit; 946 struct xgmac_priv *priv = netdev_priv(dev); 947 void __iomem *ioaddr = priv->base; 948 949 /* Save the ctrl register value */ 950 ctrl = readl(ioaddr + XGMAC_CONTROL) & XGMAC_CONTROL_SPD_MASK; 951 952 /* SW reset */ 953 value = DMA_BUS_MODE_SFT_RESET; 954 writel(value, ioaddr + XGMAC_DMA_BUS_MODE); 955 limit = 15000; 956 while (limit-- && 957 (readl(ioaddr + XGMAC_DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET)) 958 cpu_relax(); 959 if (limit < 0) 960 return -EBUSY; 961 962 value = (0x10 << DMA_BUS_MODE_PBL_SHIFT) | 963 (0x10 << DMA_BUS_MODE_RPBL_SHIFT) | 964 DMA_BUS_MODE_FB | DMA_BUS_MODE_ATDS | DMA_BUS_MODE_AAL; 965 writel(value, ioaddr + XGMAC_DMA_BUS_MODE); 966 967 writel(0, ioaddr + XGMAC_DMA_INTR_ENA); 968 969 /* Mask power mgt interrupt */ 970 writel(XGMAC_INT_STAT_PMTIM, ioaddr + XGMAC_INT_STAT); 971 972 /* XGMAC requires AXI bus init. This is a 'magic number' for now */ 973 writel(0x0077000E, ioaddr + XGMAC_DMA_AXI_BUS); 974 975 ctrl |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_JE | XGMAC_CONTROL_ACS | 976 XGMAC_CONTROL_CAR; 977 if (dev->features & NETIF_F_RXCSUM) 978 ctrl |= XGMAC_CONTROL_IPC; 979 writel(ctrl, ioaddr + XGMAC_CONTROL); 980 981 writel(DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); 982 983 /* Set the HW DMA mode and the COE */ 984 writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA | 985 XGMAC_OMR_RTC_256, 986 ioaddr + XGMAC_OMR); 987 988 /* Reset the MMC counters */ 989 writel(1, ioaddr + XGMAC_MMC_CTRL); 990 return 0; 991} 992 993/** 994 * xgmac_open - open entry point of the driver 995 * @dev : pointer to the device structure. 996 * Description: 997 * This function is the open entry point of the driver. 998 * Return value: 999 * 0 on success and an appropriate (-)ve integer as defined in errno.h 1000 * file on failure. 1001 */ 1002static int xgmac_open(struct net_device *dev) 1003{ 1004 int ret; 1005 struct xgmac_priv *priv = netdev_priv(dev); 1006 void __iomem *ioaddr = priv->base; 1007 1008 /* Check that the MAC address is valid. If its not, refuse 1009 * to bring the device up. The user must specify an 1010 * address using the following linux command: 1011 * ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */ 1012 if (!is_valid_ether_addr(dev->dev_addr)) { 1013 eth_hw_addr_random(dev); 1014 netdev_dbg(priv->dev, "generated random MAC address %pM\n", 1015 dev->dev_addr); 1016 } 1017 1018 memset(&priv->xstats, 0, sizeof(struct xgmac_extra_stats)); 1019 1020 /* Initialize the XGMAC and descriptors */ 1021 xgmac_hw_init(dev); 1022 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0); 1023 xgmac_set_flow_ctrl(priv, priv->rx_pause, priv->tx_pause); 1024 1025 ret = xgmac_dma_desc_rings_init(dev); 1026 if (ret < 0) 1027 return ret; 1028 1029 /* Enable the MAC Rx/Tx */ 1030 xgmac_mac_enable(ioaddr); 1031 1032 napi_enable(&priv->napi); 1033 netif_start_queue(dev); 1034 1035 /* Enable interrupts */ 1036 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); 1037 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); 1038 1039 return 0; 1040} 1041 1042/** 1043 * xgmac_stop - close entry point of the driver 1044 * @dev : device pointer. 1045 * Description: 1046 * This is the stop entry point of the driver. 1047 */ 1048static int xgmac_stop(struct net_device *dev) 1049{ 1050 struct xgmac_priv *priv = netdev_priv(dev); 1051 1052 if (readl(priv->base + XGMAC_DMA_INTR_ENA)) 1053 napi_disable(&priv->napi); 1054 1055 writel(0, priv->base + XGMAC_DMA_INTR_ENA); 1056 1057 netif_tx_disable(dev); 1058 1059 /* Disable the MAC core */ 1060 xgmac_mac_disable(priv->base); 1061 1062 /* Release and free the Rx/Tx resources */ 1063 xgmac_free_dma_desc_rings(priv); 1064 1065 return 0; 1066} 1067 1068/** 1069 * xgmac_xmit: 1070 * @skb : the socket buffer 1071 * @dev : device pointer 1072 * Description : Tx entry point of the driver. 1073 */ 1074static netdev_tx_t xgmac_xmit(struct sk_buff *skb, struct net_device *dev) 1075{ 1076 struct xgmac_priv *priv = netdev_priv(dev); 1077 unsigned int entry; 1078 int i; 1079 u32 irq_flag; 1080 int nfrags = skb_shinfo(skb)->nr_frags; 1081 struct xgmac_dma_desc *desc, *first; 1082 unsigned int desc_flags; 1083 unsigned int len; 1084 dma_addr_t paddr; 1085 1086 priv->tx_irq_cnt = (priv->tx_irq_cnt + 1) & (DMA_TX_RING_SZ/4 - 1); 1087 irq_flag = priv->tx_irq_cnt ? 0 : TXDESC_INTERRUPT; 1088 1089 desc_flags = (skb->ip_summed == CHECKSUM_PARTIAL) ? 1090 TXDESC_CSUM_ALL : 0; 1091 entry = priv->tx_head; 1092 desc = priv->dma_tx + entry; 1093 first = desc; 1094 1095 len = skb_headlen(skb); 1096 paddr = dma_map_single(priv->device, skb->data, len, DMA_TO_DEVICE); 1097 if (dma_mapping_error(priv->device, paddr)) { 1098 dev_kfree_skb_any(skb); 1099 return NETDEV_TX_OK; 1100 } 1101 priv->tx_skbuff[entry] = skb; 1102 desc_set_buf_addr_and_size(desc, paddr, len); 1103 1104 for (i = 0; i < nfrags; i++) { 1105 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1106 1107 len = skb_frag_size(frag); 1108 1109 paddr = skb_frag_dma_map(priv->device, frag, 0, len, 1110 DMA_TO_DEVICE); 1111 if (dma_mapping_error(priv->device, paddr)) 1112 goto dma_err; 1113 1114 entry = dma_ring_incr(entry, DMA_TX_RING_SZ); 1115 desc = priv->dma_tx + entry; 1116 priv->tx_skbuff[entry] = skb; 1117 1118 desc_set_buf_addr_and_size(desc, paddr, len); 1119 if (i < (nfrags - 1)) 1120 desc_set_tx_owner(desc, desc_flags); 1121 } 1122 1123 /* Interrupt on completition only for the latest segment */ 1124 if (desc != first) 1125 desc_set_tx_owner(desc, desc_flags | 1126 TXDESC_LAST_SEG | irq_flag); 1127 else 1128 desc_flags |= TXDESC_LAST_SEG | irq_flag; 1129 1130 /* Set owner on first desc last to avoid race condition */ 1131 wmb(); 1132 desc_set_tx_owner(first, desc_flags | TXDESC_FIRST_SEG); 1133 1134 writel(1, priv->base + XGMAC_DMA_TX_POLL); 1135 1136 priv->tx_head = dma_ring_incr(entry, DMA_TX_RING_SZ); 1137 1138 /* Ensure tx_head update is visible to tx completion */ 1139 smp_mb(); 1140 if (unlikely(tx_dma_ring_space(priv) <= MAX_SKB_FRAGS)) { 1141 netif_stop_queue(dev); 1142 /* Ensure netif_stop_queue is visible to tx completion */ 1143 smp_mb(); 1144 if (tx_dma_ring_space(priv) > MAX_SKB_FRAGS) 1145 netif_start_queue(dev); 1146 } 1147 return NETDEV_TX_OK; 1148 1149dma_err: 1150 entry = priv->tx_head; 1151 for ( ; i > 0; i--) { 1152 entry = dma_ring_incr(entry, DMA_TX_RING_SZ); 1153 desc = priv->dma_tx + entry; 1154 priv->tx_skbuff[entry] = NULL; 1155 dma_unmap_page(priv->device, desc_get_buf_addr(desc), 1156 desc_get_buf_len(desc), DMA_TO_DEVICE); 1157 desc_clear_tx_owner(desc); 1158 } 1159 desc = first; 1160 dma_unmap_single(priv->device, desc_get_buf_addr(desc), 1161 desc_get_buf_len(desc), DMA_TO_DEVICE); 1162 dev_kfree_skb_any(skb); 1163 return NETDEV_TX_OK; 1164} 1165 1166static int xgmac_rx(struct xgmac_priv *priv, int limit) 1167{ 1168 unsigned int entry; 1169 unsigned int count = 0; 1170 struct xgmac_dma_desc *p; 1171 1172 while (count < limit) { 1173 int ip_checksum; 1174 struct sk_buff *skb; 1175 int frame_len; 1176 1177 if (!dma_ring_cnt(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ)) 1178 break; 1179 1180 entry = priv->rx_tail; 1181 p = priv->dma_rx + entry; 1182 if (desc_get_owner(p)) 1183 break; 1184 1185 count++; 1186 priv->rx_tail = dma_ring_incr(priv->rx_tail, DMA_RX_RING_SZ); 1187 1188 /* read the status of the incoming frame */ 1189 ip_checksum = desc_get_rx_status(priv, p); 1190 if (ip_checksum < 0) 1191 continue; 1192 1193 skb = priv->rx_skbuff[entry]; 1194 if (unlikely(!skb)) { 1195 netdev_err(priv->dev, "Inconsistent Rx descriptor chain\n"); 1196 break; 1197 } 1198 priv->rx_skbuff[entry] = NULL; 1199 1200 frame_len = desc_get_rx_frame_len(p); 1201 netdev_dbg(priv->dev, "RX frame size %d, COE status: %d\n", 1202 frame_len, ip_checksum); 1203 1204 skb_put(skb, frame_len); 1205 dma_unmap_single(priv->device, desc_get_buf_addr(p), 1206 priv->dma_buf_sz - NET_IP_ALIGN, DMA_FROM_DEVICE); 1207 1208 skb->protocol = eth_type_trans(skb, priv->dev); 1209 skb->ip_summed = ip_checksum; 1210 if (ip_checksum == CHECKSUM_NONE) 1211 netif_receive_skb(skb); 1212 else 1213 napi_gro_receive(&priv->napi, skb); 1214 } 1215 1216 xgmac_rx_refill(priv); 1217 1218 return count; 1219} 1220 1221/** 1222 * xgmac_poll - xgmac poll method (NAPI) 1223 * @napi : pointer to the napi structure. 1224 * @budget : maximum number of packets that the current CPU can receive from 1225 * all interfaces. 1226 * Description : 1227 * This function implements the reception process. 1228 * Also it runs the TX completion thread 1229 */ 1230static int xgmac_poll(struct napi_struct *napi, int budget) 1231{ 1232 struct xgmac_priv *priv = container_of(napi, 1233 struct xgmac_priv, napi); 1234 int work_done = 0; 1235 1236 xgmac_tx_complete(priv); 1237 work_done = xgmac_rx(priv, budget); 1238 1239 if (work_done < budget) { 1240 napi_complete_done(napi, work_done); 1241 __raw_writel(DMA_INTR_DEFAULT_MASK, priv->base + XGMAC_DMA_INTR_ENA); 1242 } 1243 return work_done; 1244} 1245 1246/** 1247 * xgmac_tx_timeout 1248 * @dev : Pointer to net device structure 1249 * @txqueue: index of the hung transmit queue 1250 * 1251 * Description: this function is called when a packet transmission fails to 1252 * complete within a reasonable tmrate. The driver will mark the error in the 1253 * netdev structure and arrange for the device to be reset to a sane state 1254 * in order to transmit a new packet. 1255 */ 1256static void xgmac_tx_timeout(struct net_device *dev, unsigned int txqueue) 1257{ 1258 struct xgmac_priv *priv = netdev_priv(dev); 1259 schedule_work(&priv->tx_timeout_work); 1260} 1261 1262/** 1263 * xgmac_set_rx_mode - entry point for multicast addressing 1264 * @dev : pointer to the device structure 1265 * Description: 1266 * This function is a driver entry point which gets called by the kernel 1267 * whenever multicast addresses must be enabled/disabled. 1268 * Return value: 1269 * void. 1270 */ 1271static void xgmac_set_rx_mode(struct net_device *dev) 1272{ 1273 int i; 1274 struct xgmac_priv *priv = netdev_priv(dev); 1275 void __iomem *ioaddr = priv->base; 1276 unsigned int value = 0; 1277 u32 hash_filter[XGMAC_NUM_HASH]; 1278 int reg = 1; 1279 struct netdev_hw_addr *ha; 1280 bool use_hash = false; 1281 1282 netdev_dbg(priv->dev, "# mcasts %d, # unicast %d\n", 1283 netdev_mc_count(dev), netdev_uc_count(dev)); 1284 1285 if (dev->flags & IFF_PROMISC) 1286 value |= XGMAC_FRAME_FILTER_PR; 1287 1288 memset(hash_filter, 0, sizeof(hash_filter)); 1289 1290 if (netdev_uc_count(dev) > priv->max_macs) { 1291 use_hash = true; 1292 value |= XGMAC_FRAME_FILTER_HUC | XGMAC_FRAME_FILTER_HPF; 1293 } 1294 netdev_for_each_uc_addr(ha, dev) { 1295 if (use_hash) { 1296 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23; 1297 1298 /* The most significant 4 bits determine the register to 1299 * use (H/L) while the other 5 bits determine the bit 1300 * within the register. */ 1301 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); 1302 } else { 1303 xgmac_set_mac_addr(ioaddr, ha->addr, reg); 1304 reg++; 1305 } 1306 } 1307 1308 if (dev->flags & IFF_ALLMULTI) { 1309 value |= XGMAC_FRAME_FILTER_PM; 1310 goto out; 1311 } 1312 1313 if ((netdev_mc_count(dev) + reg - 1) > priv->max_macs) { 1314 use_hash = true; 1315 value |= XGMAC_FRAME_FILTER_HMC | XGMAC_FRAME_FILTER_HPF; 1316 } else { 1317 use_hash = false; 1318 } 1319 netdev_for_each_mc_addr(ha, dev) { 1320 if (use_hash) { 1321 u32 bit_nr = ~ether_crc(ETH_ALEN, ha->addr) >> 23; 1322 1323 /* The most significant 4 bits determine the register to 1324 * use (H/L) while the other 5 bits determine the bit 1325 * within the register. */ 1326 hash_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); 1327 } else { 1328 xgmac_set_mac_addr(ioaddr, ha->addr, reg); 1329 reg++; 1330 } 1331 } 1332 1333out: 1334 for (i = reg; i <= priv->max_macs; i++) 1335 xgmac_set_mac_addr(ioaddr, NULL, i); 1336 for (i = 0; i < XGMAC_NUM_HASH; i++) 1337 writel(hash_filter[i], ioaddr + XGMAC_HASH(i)); 1338 1339 writel(value, ioaddr + XGMAC_FRAME_FILTER); 1340} 1341 1342/** 1343 * xgmac_change_mtu - entry point to change MTU size for the device. 1344 * @dev : device pointer. 1345 * @new_mtu : the new MTU size for the device. 1346 * Description: the Maximum Transfer Unit (MTU) is used by the network layer 1347 * to drive packet transmission. Ethernet has an MTU of 1500 octets 1348 * (ETH_DATA_LEN). This value can be changed with ifconfig. 1349 * Return value: 1350 * 0 on success and an appropriate (-)ve integer as defined in errno.h 1351 * file on failure. 1352 */ 1353static int xgmac_change_mtu(struct net_device *dev, int new_mtu) 1354{ 1355 /* Stop everything, get ready to change the MTU */ 1356 if (!netif_running(dev)) 1357 return 0; 1358 1359 /* Bring interface down, change mtu and bring interface back up */ 1360 xgmac_stop(dev); 1361 dev->mtu = new_mtu; 1362 return xgmac_open(dev); 1363} 1364 1365static irqreturn_t xgmac_pmt_interrupt(int irq, void *dev_id) 1366{ 1367 u32 intr_status; 1368 struct net_device *dev = (struct net_device *)dev_id; 1369 struct xgmac_priv *priv = netdev_priv(dev); 1370 void __iomem *ioaddr = priv->base; 1371 1372 intr_status = __raw_readl(ioaddr + XGMAC_INT_STAT); 1373 if (intr_status & XGMAC_INT_STAT_PMT) { 1374 netdev_dbg(priv->dev, "received Magic frame\n"); 1375 /* clear the PMT bits 5 and 6 by reading the PMT */ 1376 readl(ioaddr + XGMAC_PMT); 1377 } 1378 return IRQ_HANDLED; 1379} 1380 1381static irqreturn_t xgmac_interrupt(int irq, void *dev_id) 1382{ 1383 u32 intr_status; 1384 struct net_device *dev = (struct net_device *)dev_id; 1385 struct xgmac_priv *priv = netdev_priv(dev); 1386 struct xgmac_extra_stats *x = &priv->xstats; 1387 1388 /* read the status register (CSR5) */ 1389 intr_status = __raw_readl(priv->base + XGMAC_DMA_STATUS); 1390 intr_status &= __raw_readl(priv->base + XGMAC_DMA_INTR_ENA); 1391 __raw_writel(intr_status, priv->base + XGMAC_DMA_STATUS); 1392 1393 /* It displays the DMA process states (CSR5 register) */ 1394 /* ABNORMAL interrupts */ 1395 if (unlikely(intr_status & DMA_STATUS_AIS)) { 1396 if (intr_status & DMA_STATUS_TJT) { 1397 netdev_err(priv->dev, "transmit jabber\n"); 1398 x->tx_jabber++; 1399 } 1400 if (intr_status & DMA_STATUS_RU) 1401 x->rx_buf_unav++; 1402 if (intr_status & DMA_STATUS_RPS) { 1403 netdev_err(priv->dev, "receive process stopped\n"); 1404 x->rx_process_stopped++; 1405 } 1406 if (intr_status & DMA_STATUS_ETI) { 1407 netdev_err(priv->dev, "transmit early interrupt\n"); 1408 x->tx_early++; 1409 } 1410 if (intr_status & DMA_STATUS_TPS) { 1411 netdev_err(priv->dev, "transmit process stopped\n"); 1412 x->tx_process_stopped++; 1413 schedule_work(&priv->tx_timeout_work); 1414 } 1415 if (intr_status & DMA_STATUS_FBI) { 1416 netdev_err(priv->dev, "fatal bus error\n"); 1417 x->fatal_bus_error++; 1418 } 1419 } 1420 1421 /* TX/RX NORMAL interrupts */ 1422 if (intr_status & (DMA_STATUS_RI | DMA_STATUS_TU | DMA_STATUS_TI)) { 1423 __raw_writel(DMA_INTR_ABNORMAL, priv->base + XGMAC_DMA_INTR_ENA); 1424 napi_schedule(&priv->napi); 1425 } 1426 1427 return IRQ_HANDLED; 1428} 1429 1430#ifdef CONFIG_NET_POLL_CONTROLLER 1431/* Polling receive - used by NETCONSOLE and other diagnostic tools 1432 * to allow network I/O with interrupts disabled. */ 1433static void xgmac_poll_controller(struct net_device *dev) 1434{ 1435 disable_irq(dev->irq); 1436 xgmac_interrupt(dev->irq, dev); 1437 enable_irq(dev->irq); 1438} 1439#endif 1440 1441static void 1442xgmac_get_stats64(struct net_device *dev, 1443 struct rtnl_link_stats64 *storage) 1444{ 1445 struct xgmac_priv *priv = netdev_priv(dev); 1446 void __iomem *base = priv->base; 1447 u32 count; 1448 1449 spin_lock_bh(&priv->stats_lock); 1450 writel(XGMAC_MMC_CTRL_CNT_FRZ, base + XGMAC_MMC_CTRL); 1451 1452 storage->rx_bytes = readl(base + XGMAC_MMC_RXOCTET_G_LO); 1453 storage->rx_bytes |= (u64)(readl(base + XGMAC_MMC_RXOCTET_G_HI)) << 32; 1454 1455 storage->rx_packets = readl(base + XGMAC_MMC_RXFRAME_GB_LO); 1456 storage->multicast = readl(base + XGMAC_MMC_RXMCFRAME_G); 1457 storage->rx_crc_errors = readl(base + XGMAC_MMC_RXCRCERR); 1458 storage->rx_length_errors = readl(base + XGMAC_MMC_RXLENGTHERR); 1459 storage->rx_missed_errors = readl(base + XGMAC_MMC_RXOVERFLOW); 1460 1461 storage->tx_bytes = readl(base + XGMAC_MMC_TXOCTET_G_LO); 1462 storage->tx_bytes |= (u64)(readl(base + XGMAC_MMC_TXOCTET_G_HI)) << 32; 1463 1464 count = readl(base + XGMAC_MMC_TXFRAME_GB_LO); 1465 storage->tx_errors = count - readl(base + XGMAC_MMC_TXFRAME_G_LO); 1466 storage->tx_packets = count; 1467 storage->tx_fifo_errors = readl(base + XGMAC_MMC_TXUNDERFLOW); 1468 1469 writel(0, base + XGMAC_MMC_CTRL); 1470 spin_unlock_bh(&priv->stats_lock); 1471} 1472 1473static int xgmac_set_mac_address(struct net_device *dev, void *p) 1474{ 1475 struct xgmac_priv *priv = netdev_priv(dev); 1476 void __iomem *ioaddr = priv->base; 1477 struct sockaddr *addr = p; 1478 1479 if (!is_valid_ether_addr(addr->sa_data)) 1480 return -EADDRNOTAVAIL; 1481 1482 eth_hw_addr_set(dev, addr->sa_data); 1483 1484 xgmac_set_mac_addr(ioaddr, dev->dev_addr, 0); 1485 1486 return 0; 1487} 1488 1489static int xgmac_set_features(struct net_device *dev, netdev_features_t features) 1490{ 1491 u32 ctrl; 1492 struct xgmac_priv *priv = netdev_priv(dev); 1493 void __iomem *ioaddr = priv->base; 1494 netdev_features_t changed = dev->features ^ features; 1495 1496 if (!(changed & NETIF_F_RXCSUM)) 1497 return 0; 1498 1499 ctrl = readl(ioaddr + XGMAC_CONTROL); 1500 if (features & NETIF_F_RXCSUM) 1501 ctrl |= XGMAC_CONTROL_IPC; 1502 else 1503 ctrl &= ~XGMAC_CONTROL_IPC; 1504 writel(ctrl, ioaddr + XGMAC_CONTROL); 1505 1506 return 0; 1507} 1508 1509static const struct net_device_ops xgmac_netdev_ops = { 1510 .ndo_open = xgmac_open, 1511 .ndo_start_xmit = xgmac_xmit, 1512 .ndo_stop = xgmac_stop, 1513 .ndo_change_mtu = xgmac_change_mtu, 1514 .ndo_set_rx_mode = xgmac_set_rx_mode, 1515 .ndo_tx_timeout = xgmac_tx_timeout, 1516 .ndo_get_stats64 = xgmac_get_stats64, 1517#ifdef CONFIG_NET_POLL_CONTROLLER 1518 .ndo_poll_controller = xgmac_poll_controller, 1519#endif 1520 .ndo_set_mac_address = xgmac_set_mac_address, 1521 .ndo_set_features = xgmac_set_features, 1522}; 1523 1524static int xgmac_ethtool_get_link_ksettings(struct net_device *dev, 1525 struct ethtool_link_ksettings *cmd) 1526{ 1527 cmd->base.autoneg = 0; 1528 cmd->base.duplex = DUPLEX_FULL; 1529 cmd->base.speed = 10000; 1530 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 0); 1531 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 0); 1532 return 0; 1533} 1534 1535static void xgmac_get_pauseparam(struct net_device *netdev, 1536 struct ethtool_pauseparam *pause) 1537{ 1538 struct xgmac_priv *priv = netdev_priv(netdev); 1539 1540 pause->rx_pause = priv->rx_pause; 1541 pause->tx_pause = priv->tx_pause; 1542} 1543 1544static int xgmac_set_pauseparam(struct net_device *netdev, 1545 struct ethtool_pauseparam *pause) 1546{ 1547 struct xgmac_priv *priv = netdev_priv(netdev); 1548 1549 if (pause->autoneg) 1550 return -EINVAL; 1551 1552 return xgmac_set_flow_ctrl(priv, pause->rx_pause, pause->tx_pause); 1553} 1554 1555struct xgmac_stats { 1556 char stat_string[ETH_GSTRING_LEN]; 1557 int stat_offset; 1558 bool is_reg; 1559}; 1560 1561#define XGMAC_STAT(m) \ 1562 { #m, offsetof(struct xgmac_priv, xstats.m), false } 1563#define XGMAC_HW_STAT(m, reg_offset) \ 1564 { #m, reg_offset, true } 1565 1566static const struct xgmac_stats xgmac_gstrings_stats[] = { 1567 XGMAC_STAT(tx_frame_flushed), 1568 XGMAC_STAT(tx_payload_error), 1569 XGMAC_STAT(tx_ip_header_error), 1570 XGMAC_STAT(tx_local_fault), 1571 XGMAC_STAT(tx_remote_fault), 1572 XGMAC_STAT(tx_early), 1573 XGMAC_STAT(tx_process_stopped), 1574 XGMAC_STAT(tx_jabber), 1575 XGMAC_STAT(rx_buf_unav), 1576 XGMAC_STAT(rx_process_stopped), 1577 XGMAC_STAT(rx_payload_error), 1578 XGMAC_STAT(rx_ip_header_error), 1579 XGMAC_STAT(rx_da_filter_fail), 1580 XGMAC_STAT(fatal_bus_error), 1581 XGMAC_HW_STAT(rx_watchdog, XGMAC_MMC_RXWATCHDOG), 1582 XGMAC_HW_STAT(tx_vlan, XGMAC_MMC_TXVLANFRAME), 1583 XGMAC_HW_STAT(rx_vlan, XGMAC_MMC_RXVLANFRAME), 1584 XGMAC_HW_STAT(tx_pause, XGMAC_MMC_TXPAUSEFRAME), 1585 XGMAC_HW_STAT(rx_pause, XGMAC_MMC_RXPAUSEFRAME), 1586}; 1587#define XGMAC_STATS_LEN ARRAY_SIZE(xgmac_gstrings_stats) 1588 1589static void xgmac_get_ethtool_stats(struct net_device *dev, 1590 struct ethtool_stats *dummy, 1591 u64 *data) 1592{ 1593 struct xgmac_priv *priv = netdev_priv(dev); 1594 void *p = priv; 1595 int i; 1596 1597 for (i = 0; i < XGMAC_STATS_LEN; i++) { 1598 if (xgmac_gstrings_stats[i].is_reg) 1599 *data++ = readl(priv->base + 1600 xgmac_gstrings_stats[i].stat_offset); 1601 else 1602 *data++ = *(u32 *)(p + 1603 xgmac_gstrings_stats[i].stat_offset); 1604 } 1605} 1606 1607static int xgmac_get_sset_count(struct net_device *netdev, int sset) 1608{ 1609 switch (sset) { 1610 case ETH_SS_STATS: 1611 return XGMAC_STATS_LEN; 1612 default: 1613 return -EINVAL; 1614 } 1615} 1616 1617static void xgmac_get_strings(struct net_device *dev, u32 stringset, 1618 u8 *data) 1619{ 1620 int i; 1621 u8 *p = data; 1622 1623 switch (stringset) { 1624 case ETH_SS_STATS: 1625 for (i = 0; i < XGMAC_STATS_LEN; i++) { 1626 memcpy(p, xgmac_gstrings_stats[i].stat_string, 1627 ETH_GSTRING_LEN); 1628 p += ETH_GSTRING_LEN; 1629 } 1630 break; 1631 default: 1632 WARN_ON(1); 1633 break; 1634 } 1635} 1636 1637static void xgmac_get_wol(struct net_device *dev, 1638 struct ethtool_wolinfo *wol) 1639{ 1640 struct xgmac_priv *priv = netdev_priv(dev); 1641 1642 if (device_can_wakeup(priv->device)) { 1643 wol->supported = WAKE_MAGIC | WAKE_UCAST; 1644 wol->wolopts = priv->wolopts; 1645 } 1646} 1647 1648static int xgmac_set_wol(struct net_device *dev, 1649 struct ethtool_wolinfo *wol) 1650{ 1651 struct xgmac_priv *priv = netdev_priv(dev); 1652 u32 support = WAKE_MAGIC | WAKE_UCAST; 1653 1654 if (!device_can_wakeup(priv->device)) 1655 return -ENOTSUPP; 1656 1657 if (wol->wolopts & ~support) 1658 return -EINVAL; 1659 1660 priv->wolopts = wol->wolopts; 1661 1662 if (wol->wolopts) { 1663 device_set_wakeup_enable(priv->device, 1); 1664 enable_irq_wake(dev->irq); 1665 } else { 1666 device_set_wakeup_enable(priv->device, 0); 1667 disable_irq_wake(dev->irq); 1668 } 1669 1670 return 0; 1671} 1672 1673static const struct ethtool_ops xgmac_ethtool_ops = { 1674 .get_link = ethtool_op_get_link, 1675 .get_pauseparam = xgmac_get_pauseparam, 1676 .set_pauseparam = xgmac_set_pauseparam, 1677 .get_ethtool_stats = xgmac_get_ethtool_stats, 1678 .get_strings = xgmac_get_strings, 1679 .get_wol = xgmac_get_wol, 1680 .set_wol = xgmac_set_wol, 1681 .get_sset_count = xgmac_get_sset_count, 1682 .get_link_ksettings = xgmac_ethtool_get_link_ksettings, 1683}; 1684 1685/** 1686 * xgmac_probe 1687 * @pdev: platform device pointer 1688 * Description: the driver is initialized through platform_device. 1689 */ 1690static int xgmac_probe(struct platform_device *pdev) 1691{ 1692 int ret = 0; 1693 struct resource *res; 1694 struct net_device *ndev = NULL; 1695 struct xgmac_priv *priv = NULL; 1696 u8 addr[ETH_ALEN]; 1697 u32 uid; 1698 1699 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1700 if (!res) 1701 return -ENODEV; 1702 1703 if (!request_mem_region(res->start, resource_size(res), pdev->name)) 1704 return -EBUSY; 1705 1706 ndev = alloc_etherdev(sizeof(struct xgmac_priv)); 1707 if (!ndev) { 1708 ret = -ENOMEM; 1709 goto err_alloc; 1710 } 1711 1712 SET_NETDEV_DEV(ndev, &pdev->dev); 1713 priv = netdev_priv(ndev); 1714 platform_set_drvdata(pdev, ndev); 1715 ndev->netdev_ops = &xgmac_netdev_ops; 1716 ndev->ethtool_ops = &xgmac_ethtool_ops; 1717 spin_lock_init(&priv->stats_lock); 1718 INIT_WORK(&priv->tx_timeout_work, xgmac_tx_timeout_work); 1719 1720 priv->device = &pdev->dev; 1721 priv->dev = ndev; 1722 priv->rx_pause = 1; 1723 priv->tx_pause = 1; 1724 1725 priv->base = ioremap(res->start, resource_size(res)); 1726 if (!priv->base) { 1727 netdev_err(ndev, "ioremap failed\n"); 1728 ret = -ENOMEM; 1729 goto err_io; 1730 } 1731 1732 uid = readl(priv->base + XGMAC_VERSION); 1733 netdev_info(ndev, "h/w version is 0x%x\n", uid); 1734 1735 /* Figure out how many valid mac address filter registers we have */ 1736 writel(1, priv->base + XGMAC_ADDR_HIGH(31)); 1737 if (readl(priv->base + XGMAC_ADDR_HIGH(31)) == 1) 1738 priv->max_macs = 31; 1739 else 1740 priv->max_macs = 7; 1741 1742 writel(0, priv->base + XGMAC_DMA_INTR_ENA); 1743 ndev->irq = platform_get_irq(pdev, 0); 1744 if (ndev->irq == -ENXIO) { 1745 netdev_err(ndev, "No irq resource\n"); 1746 ret = ndev->irq; 1747 goto err_irq; 1748 } 1749 1750 ret = request_irq(ndev->irq, xgmac_interrupt, 0, 1751 dev_name(&pdev->dev), ndev); 1752 if (ret < 0) { 1753 netdev_err(ndev, "Could not request irq %d - ret %d)\n", 1754 ndev->irq, ret); 1755 goto err_irq; 1756 } 1757 1758 priv->pmt_irq = platform_get_irq(pdev, 1); 1759 if (priv->pmt_irq == -ENXIO) { 1760 netdev_err(ndev, "No pmt irq resource\n"); 1761 ret = priv->pmt_irq; 1762 goto err_pmt_irq; 1763 } 1764 1765 ret = request_irq(priv->pmt_irq, xgmac_pmt_interrupt, 0, 1766 dev_name(&pdev->dev), ndev); 1767 if (ret < 0) { 1768 netdev_err(ndev, "Could not request irq %d - ret %d)\n", 1769 priv->pmt_irq, ret); 1770 goto err_pmt_irq; 1771 } 1772 1773 device_set_wakeup_capable(&pdev->dev, 1); 1774 if (device_can_wakeup(priv->device)) 1775 priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */ 1776 1777 ndev->hw_features = NETIF_F_SG | NETIF_F_HIGHDMA; 1778 if (readl(priv->base + XGMAC_DMA_HW_FEATURE) & DMA_HW_FEAT_TXCOESEL) 1779 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1780 NETIF_F_RXCSUM; 1781 ndev->features |= ndev->hw_features; 1782 ndev->priv_flags |= IFF_UNICAST_FLT; 1783 1784 /* MTU range: 46 - 9000 */ 1785 ndev->min_mtu = ETH_ZLEN - ETH_HLEN; 1786 ndev->max_mtu = XGMAC_MAX_MTU; 1787 1788 /* Get the MAC address */ 1789 xgmac_get_mac_addr(priv->base, addr, 0); 1790 eth_hw_addr_set(ndev, addr); 1791 if (!is_valid_ether_addr(ndev->dev_addr)) 1792 netdev_warn(ndev, "MAC address %pM not valid", 1793 ndev->dev_addr); 1794 1795 netif_napi_add(ndev, &priv->napi, xgmac_poll); 1796 ret = register_netdev(ndev); 1797 if (ret) 1798 goto err_reg; 1799 1800 return 0; 1801 1802err_reg: 1803 netif_napi_del(&priv->napi); 1804 free_irq(priv->pmt_irq, ndev); 1805err_pmt_irq: 1806 free_irq(ndev->irq, ndev); 1807err_irq: 1808 iounmap(priv->base); 1809err_io: 1810 free_netdev(ndev); 1811err_alloc: 1812 release_mem_region(res->start, resource_size(res)); 1813 return ret; 1814} 1815 1816/** 1817 * xgmac_remove 1818 * @pdev: platform device pointer 1819 * Description: this function resets the TX/RX processes, disables the MAC RX/TX 1820 * changes the link status, releases the DMA descriptor rings, 1821 * unregisters the MDIO bus and unmaps the allocated memory. 1822 */ 1823static void xgmac_remove(struct platform_device *pdev) 1824{ 1825 struct net_device *ndev = platform_get_drvdata(pdev); 1826 struct xgmac_priv *priv = netdev_priv(ndev); 1827 struct resource *res; 1828 1829 xgmac_mac_disable(priv->base); 1830 1831 /* Free the IRQ lines */ 1832 free_irq(ndev->irq, ndev); 1833 free_irq(priv->pmt_irq, ndev); 1834 1835 unregister_netdev(ndev); 1836 netif_napi_del(&priv->napi); 1837 1838 iounmap(priv->base); 1839 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1840 release_mem_region(res->start, resource_size(res)); 1841 1842 free_netdev(ndev); 1843} 1844 1845#ifdef CONFIG_PM_SLEEP 1846static void xgmac_pmt(void __iomem *ioaddr, unsigned long mode) 1847{ 1848 unsigned int pmt = 0; 1849 1850 if (mode & WAKE_MAGIC) 1851 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_MAGIC_PKT_EN; 1852 if (mode & WAKE_UCAST) 1853 pmt |= XGMAC_PMT_POWERDOWN | XGMAC_PMT_GLBL_UNICAST; 1854 1855 writel(pmt, ioaddr + XGMAC_PMT); 1856} 1857 1858static int xgmac_suspend(struct device *dev) 1859{ 1860 struct net_device *ndev = dev_get_drvdata(dev); 1861 struct xgmac_priv *priv = netdev_priv(ndev); 1862 u32 value; 1863 1864 if (!ndev || !netif_running(ndev)) 1865 return 0; 1866 1867 netif_device_detach(ndev); 1868 napi_disable(&priv->napi); 1869 writel(0, priv->base + XGMAC_DMA_INTR_ENA); 1870 1871 if (device_may_wakeup(priv->device)) { 1872 /* Stop TX/RX DMA Only */ 1873 value = readl(priv->base + XGMAC_DMA_CONTROL); 1874 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR); 1875 writel(value, priv->base + XGMAC_DMA_CONTROL); 1876 1877 xgmac_pmt(priv->base, priv->wolopts); 1878 } else 1879 xgmac_mac_disable(priv->base); 1880 1881 return 0; 1882} 1883 1884static int xgmac_resume(struct device *dev) 1885{ 1886 struct net_device *ndev = dev_get_drvdata(dev); 1887 struct xgmac_priv *priv = netdev_priv(ndev); 1888 void __iomem *ioaddr = priv->base; 1889 1890 if (!netif_running(ndev)) 1891 return 0; 1892 1893 xgmac_pmt(ioaddr, 0); 1894 1895 /* Enable the MAC and DMA */ 1896 xgmac_mac_enable(ioaddr); 1897 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_STATUS); 1898 writel(DMA_INTR_DEFAULT_MASK, ioaddr + XGMAC_DMA_INTR_ENA); 1899 1900 netif_device_attach(ndev); 1901 napi_enable(&priv->napi); 1902 1903 return 0; 1904} 1905#endif /* CONFIG_PM_SLEEP */ 1906 1907static SIMPLE_DEV_PM_OPS(xgmac_pm_ops, xgmac_suspend, xgmac_resume); 1908 1909static const struct of_device_id xgmac_of_match[] = { 1910 { .compatible = "calxeda,hb-xgmac", }, 1911 {}, 1912}; 1913MODULE_DEVICE_TABLE(of, xgmac_of_match); 1914 1915static struct platform_driver xgmac_driver = { 1916 .driver = { 1917 .name = "calxedaxgmac", 1918 .of_match_table = xgmac_of_match, 1919 .pm = &xgmac_pm_ops, 1920 }, 1921 .probe = xgmac_probe, 1922 .remove_new = xgmac_remove, 1923}; 1924 1925module_platform_driver(xgmac_driver); 1926 1927MODULE_AUTHOR("Calxeda, Inc."); 1928MODULE_DESCRIPTION("Calxeda 10G XGMAC driver"); 1929MODULE_LICENSE("GPL v2"); 1930