drivers/net/ethernet/broadcom/genet/bcmgenet.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Broadcom GENET (Gigabit Ethernet) controller driver
   4  *
   5  * Copyright (c) 2014-2020 Broadcom
   6  */
   7
   8 #define pr_fmt(fmt)                             "bcmgenet: " fmt
   9
  10 #include <linux/acpi.h>
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/sched.h>
  14 #include <linux/types.h>
  15 #include <linux/fcntl.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/string.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/delay.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/pm.h>
  25 #include <linux/clk.h>
  26 #include <net/arp.h>
  27
  28 #include <linux/mii.h>
  29 #include <linux/ethtool.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/inetdevice.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/phy.h>
  38 #include <linux/platform_data/bcmgenet.h>
  39
  40 #include <asm/unaligned.h>
  41
  42 #include "bcmgenet.h"
  43
  44 /* Maximum number of hardware queues, downsized if needed */
  45 #define GENET_MAX_MQ_CNT        4
  46
  47 /* Default highest priority queue for multi queue support */
  48 #define GENET_Q0_PRIORITY       0
  49
  50 #define GENET_Q16_RX_BD_CNT     \
  51         (TOTAL_DESC - priv->hw_params->rx_queues * priv->hw_params->rx_bds_per_q)
  52 #define GENET_Q16_TX_BD_CNT     \
  53         (TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->tx_bds_per_q)
  54
  55 #define RX_BUF_LENGTH           2048
  56 #define SKB_ALIGNMENT           32
  57
  58 /* Tx/Rx DMA register offset, skip 256 descriptors */
  59 #define WORDS_PER_BD(p)         (p->hw_params->words_per_bd)
  60 #define DMA_DESC_SIZE           (WORDS_PER_BD(priv) * sizeof(u32))
  61
  62 #define GENET_TDMA_REG_OFF      (priv->hw_params->tdma_offset + \
  63                                 TOTAL_DESC * DMA_DESC_SIZE)
  64
  65 #define GENET_RDMA_REG_OFF      (priv->hw_params->rdma_offset + \
  66                                 TOTAL_DESC * DMA_DESC_SIZE)
  67
  68 /* Forward declarations */
  69 static void bcmgenet_set_rx_mode(struct net_device *dev);
  70
  71 static inline void bcmgenet_writel(u32 value, void __iomem *offset)
  72 {
  73         /* MIPS chips strapped for BE will automagically configure the
  74          * peripheral registers for CPU-native byte order.
  75          */
  76         if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
  77                 __raw_writel(value, offset);
  78         else
  79                 writel_relaxed(value, offset);
  80 }
  81
  82 static inline u32 bcmgenet_readl(void __iomem *offset)
  83 {
  84         if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
  85                 return __raw_readl(offset);
  86         else
  87                 return readl_relaxed(offset);
  88 }
  89
  90 static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv,
  91                                              void __iomem *d, u32 value)
  92 {
  93         bcmgenet_writel(value, d + DMA_DESC_LENGTH_STATUS);
  94 }
  95
  96 static inline void dmadesc_set_addr(struct bcmgenet_priv *priv,
  97                                     void __iomem *d,
  98                                     dma_addr_t addr)
  99 {
 100         bcmgenet_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO);
 101
 102         /* Register writes to GISB bus can take couple hundred nanoseconds
 103          * and are done for each packet, save these expensive writes unless
 104          * the platform is explicitly configured for 64-bits/LPAE.
 105          */
 106 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 107         if (priv->hw_params->flags & GENET_HAS_40BITS)
 108                 bcmgenet_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI);
 109 #endif
 110 }
 111
 112 /* Combined address + length/status setter */
 113 static inline void dmadesc_set(struct bcmgenet_priv *priv,
 114                                void __iomem *d, dma_addr_t addr, u32 val)
 115 {
 116         dmadesc_set_addr(priv, d, addr);
 117         dmadesc_set_length_status(priv, d, val);
 118 }
 119
 120 #define GENET_VER_FMT   "%1d.%1d EPHY: 0x%04x"
 121
 122 #define GENET_MSG_DEFAULT       (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
 123                                 NETIF_MSG_LINK)
 124
 125 static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
 126 {
 127         if (GENET_IS_V1(priv))
 128                 return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
 129         else
 130                 return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
 131 }
 132
 133 static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
 134 {
 135         if (GENET_IS_V1(priv))
 136                 bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
 137         else
 138                 bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
 139 }
 140
 141 /* These macros are defined to deal with register map change
 142  * between GENET1.1 and GENET2. Only those currently being used
 143  * by driver are defined.
 144  */
 145 static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
 146 {
 147         if (GENET_IS_V1(priv))
 148                 return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
 149         else
 150                 return bcmgenet_readl(priv->base +
 151                                       priv->hw_params->tbuf_offset + TBUF_CTRL);
 152 }
 153
 154 static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
 155 {
 156         if (GENET_IS_V1(priv))
 157                 bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
 158         else
 159                 bcmgenet_writel(val, priv->base +
 160                                 priv->hw_params->tbuf_offset + TBUF_CTRL);
 161 }
 162
 163 static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
 164 {
 165         if (GENET_IS_V1(priv))
 166                 return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
 167         else
 168                 return bcmgenet_readl(priv->base +
 169                                       priv->hw_params->tbuf_offset + TBUF_BP_MC);
 170 }
 171
 172 static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
 173 {
 174         if (GENET_IS_V1(priv))
 175                 bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
 176         else
 177                 bcmgenet_writel(val, priv->base +
 178                                 priv->hw_params->tbuf_offset + TBUF_BP_MC);
 179 }
 180
 181 /* RX/TX DMA register accessors */
 182 enum dma_reg {
 183         DMA_RING_CFG = 0,
 184         DMA_CTRL,
 185         DMA_STATUS,
 186         DMA_SCB_BURST_SIZE,
 187         DMA_ARB_CTRL,
 188         DMA_PRIORITY_0,
 189         DMA_PRIORITY_1,
 190         DMA_PRIORITY_2,
 191         DMA_INDEX2RING_0,
 192         DMA_INDEX2RING_1,
 193         DMA_INDEX2RING_2,
 194         DMA_INDEX2RING_3,
 195         DMA_INDEX2RING_4,
 196         DMA_INDEX2RING_5,
 197         DMA_INDEX2RING_6,
 198         DMA_INDEX2RING_7,
 199         DMA_RING0_TIMEOUT,
 200         DMA_RING1_TIMEOUT,
 201         DMA_RING2_TIMEOUT,
 202         DMA_RING3_TIMEOUT,
 203         DMA_RING4_TIMEOUT,
 204         DMA_RING5_TIMEOUT,
 205         DMA_RING6_TIMEOUT,
 206         DMA_RING7_TIMEOUT,
 207         DMA_RING8_TIMEOUT,
 208         DMA_RING9_TIMEOUT,
 209         DMA_RING10_TIMEOUT,
 210         DMA_RING11_TIMEOUT,
 211         DMA_RING12_TIMEOUT,
 212         DMA_RING13_TIMEOUT,
 213         DMA_RING14_TIMEOUT,
 214         DMA_RING15_TIMEOUT,
 215         DMA_RING16_TIMEOUT,
 216 };
 217
 218 static const u8 bcmgenet_dma_regs_v3plus[] = {
 219         [DMA_RING_CFG]          = 0x00,
 220         [DMA_CTRL]              = 0x04,
 221         [DMA_STATUS]            = 0x08,
 222         [DMA_SCB_BURST_SIZE]    = 0x0C,
 223         [DMA_ARB_CTRL]          = 0x2C,
 224         [DMA_PRIORITY_0]        = 0x30,
 225         [DMA_PRIORITY_1]        = 0x34,
 226         [DMA_PRIORITY_2]        = 0x38,
 227         [DMA_RING0_TIMEOUT]     = 0x2C,
 228         [DMA_RING1_TIMEOUT]     = 0x30,
 229         [DMA_RING2_TIMEOUT]     = 0x34,
 230         [DMA_RING3_TIMEOUT]     = 0x38,
 231         [DMA_RING4_TIMEOUT]     = 0x3c,
 232         [DMA_RING5_TIMEOUT]     = 0x40,
 233         [DMA_RING6_TIMEOUT]     = 0x44,
 234         [DMA_RING7_TIMEOUT]     = 0x48,
 235         [DMA_RING8_TIMEOUT]     = 0x4c,
 236         [DMA_RING9_TIMEOUT]     = 0x50,
 237         [DMA_RING10_TIMEOUT]    = 0x54,
 238         [DMA_RING11_TIMEOUT]    = 0x58,
 239         [DMA_RING12_TIMEOUT]    = 0x5c,
 240         [DMA_RING13_TIMEOUT]    = 0x60,
 241         [DMA_RING14_TIMEOUT]    = 0x64,
 242         [DMA_RING15_TIMEOUT]    = 0x68,
 243         [DMA_RING16_TIMEOUT]    = 0x6C,
 244         [DMA_INDEX2RING_0]      = 0x70,
 245         [DMA_INDEX2RING_1]      = 0x74,
 246         [DMA_INDEX2RING_2]      = 0x78,
 247         [DMA_INDEX2RING_3]      = 0x7C,
 248         [DMA_INDEX2RING_4]      = 0x80,
 249         [DMA_INDEX2RING_5]      = 0x84,
 250         [DMA_INDEX2RING_6]      = 0x88,
 251         [DMA_INDEX2RING_7]      = 0x8C,
 252 };
 253
 254 static const u8 bcmgenet_dma_regs_v2[] = {
 255         [DMA_RING_CFG]          = 0x00,
 256         [DMA_CTRL]              = 0x04,
 257         [DMA_STATUS]            = 0x08,
 258         [DMA_SCB_BURST_SIZE]    = 0x0C,
 259         [DMA_ARB_CTRL]          = 0x30,
 260         [DMA_PRIORITY_0]        = 0x34,
 261         [DMA_PRIORITY_1]        = 0x38,
 262         [DMA_PRIORITY_2]        = 0x3C,
 263         [DMA_RING0_TIMEOUT]     = 0x2C,
 264         [DMA_RING1_TIMEOUT]     = 0x30,
 265         [DMA_RING2_TIMEOUT]     = 0x34,
 266         [DMA_RING3_TIMEOUT]     = 0x38,
 267         [DMA_RING4_TIMEOUT]     = 0x3c,
 268         [DMA_RING5_TIMEOUT]     = 0x40,
 269         [DMA_RING6_TIMEOUT]     = 0x44,
 270         [DMA_RING7_TIMEOUT]     = 0x48,
 271         [DMA_RING8_TIMEOUT]     = 0x4c,
 272         [DMA_RING9_TIMEOUT]     = 0x50,
 273         [DMA_RING10_TIMEOUT]    = 0x54,
 274         [DMA_RING11_TIMEOUT]    = 0x58,
 275         [DMA_RING12_TIMEOUT]    = 0x5c,
 276         [DMA_RING13_TIMEOUT]    = 0x60,
 277         [DMA_RING14_TIMEOUT]    = 0x64,
 278         [DMA_RING15_TIMEOUT]    = 0x68,
 279         [DMA_RING16_TIMEOUT]    = 0x6C,
 280 };
 281
 282 static const u8 bcmgenet_dma_regs_v1[] = {
 283         [DMA_CTRL]              = 0x00,
 284         [DMA_STATUS]            = 0x04,
 285         [DMA_SCB_BURST_SIZE]    = 0x0C,
 286         [DMA_ARB_CTRL]          = 0x30,
 287         [DMA_PRIORITY_0]        = 0x34,
 288         [DMA_PRIORITY_1]        = 0x38,
 289         [DMA_PRIORITY_2]        = 0x3C,
 290         [DMA_RING0_TIMEOUT]     = 0x2C,
 291         [DMA_RING1_TIMEOUT]     = 0x30,
 292         [DMA_RING2_TIMEOUT]     = 0x34,
 293         [DMA_RING3_TIMEOUT]     = 0x38,
 294         [DMA_RING4_TIMEOUT]     = 0x3c,
 295         [DMA_RING5_TIMEOUT]     = 0x40,
 296         [DMA_RING6_TIMEOUT]     = 0x44,
 297         [DMA_RING7_TIMEOUT]     = 0x48,
 298         [DMA_RING8_TIMEOUT]     = 0x4c,
 299         [DMA_RING9_TIMEOUT]     = 0x50,
 300         [DMA_RING10_TIMEOUT]    = 0x54,
 301         [DMA_RING11_TIMEOUT]    = 0x58,
 302         [DMA_RING12_TIMEOUT]    = 0x5c,
 303         [DMA_RING13_TIMEOUT]    = 0x60,
 304         [DMA_RING14_TIMEOUT]    = 0x64,
 305         [DMA_RING15_TIMEOUT]    = 0x68,
 306         [DMA_RING16_TIMEOUT]    = 0x6C,
 307 };
 308
 309 /* Set at runtime once bcmgenet version is known */
 310 static const u8 *bcmgenet_dma_regs;
 311
 312 static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
 313 {
 314         return netdev_priv(dev_get_drvdata(dev));
 315 }
 316
 317 static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
 318                                       enum dma_reg r)
 319 {
 320         return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
 321                               DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 322 }
 323
 324 static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
 325                                         u32 val, enum dma_reg r)
 326 {
 327         bcmgenet_writel(val, priv->base + GENET_TDMA_REG_OFF +
 328                         DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 329 }
 330
 331 static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
 332                                       enum dma_reg r)
 333 {
 334         return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
 335                               DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 336 }
 337
 338 static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
 339                                         u32 val, enum dma_reg r)
 340 {
 341         bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
 342                         DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 343 }
 344
 345 /* RDMA/TDMA ring registers and accessors
 346  * we merge the common fields and just prefix with T/D the registers
 347  * having different meaning depending on the direction
 348  */
 349 enum dma_ring_reg {
 350         TDMA_READ_PTR = 0,
 351         RDMA_WRITE_PTR = TDMA_READ_PTR,
 352         TDMA_READ_PTR_HI,
 353         RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
 354         TDMA_CONS_INDEX,
 355         RDMA_PROD_INDEX = TDMA_CONS_INDEX,
 356         TDMA_PROD_INDEX,
 357         RDMA_CONS_INDEX = TDMA_PROD_INDEX,
 358         DMA_RING_BUF_SIZE,
 359         DMA_START_ADDR,
 360         DMA_START_ADDR_HI,
 361         DMA_END_ADDR,
 362         DMA_END_ADDR_HI,
 363         DMA_MBUF_DONE_THRESH,
 364         TDMA_FLOW_PERIOD,
 365         RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
 366         TDMA_WRITE_PTR,
 367         RDMA_READ_PTR = TDMA_WRITE_PTR,
 368         TDMA_WRITE_PTR_HI,
 369         RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
 370 };
 371
 372 /* GENET v4 supports 40-bits pointer addressing
 373  * for obvious reasons the LO and HI word parts
 374  * are contiguous, but this offsets the other
 375  * registers.
 376  */
 377 static const u8 genet_dma_ring_regs_v4[] = {
 378         [TDMA_READ_PTR]                 = 0x00,
 379         [TDMA_READ_PTR_HI]              = 0x04,
 380         [TDMA_CONS_INDEX]               = 0x08,
 381         [TDMA_PROD_INDEX]               = 0x0C,
 382         [DMA_RING_BUF_SIZE]             = 0x10,
 383         [DMA_START_ADDR]                = 0x14,
 384         [DMA_START_ADDR_HI]             = 0x18,
 385         [DMA_END_ADDR]                  = 0x1C,
 386         [DMA_END_ADDR_HI]               = 0x20,
 387         [DMA_MBUF_DONE_THRESH]          = 0x24,
 388         [TDMA_FLOW_PERIOD]              = 0x28,
 389         [TDMA_WRITE_PTR]                = 0x2C,
 390         [TDMA_WRITE_PTR_HI]             = 0x30,
 391 };
 392
 393 static const u8 genet_dma_ring_regs_v123[] = {
 394         [TDMA_READ_PTR]                 = 0x00,
 395         [TDMA_CONS_INDEX]               = 0x04,
 396         [TDMA_PROD_INDEX]               = 0x08,
 397         [DMA_RING_BUF_SIZE]             = 0x0C,
 398         [DMA_START_ADDR]                = 0x10,
 399         [DMA_END_ADDR]                  = 0x14,
 400         [DMA_MBUF_DONE_THRESH]          = 0x18,
 401         [TDMA_FLOW_PERIOD]              = 0x1C,
 402         [TDMA_WRITE_PTR]                = 0x20,
 403 };
 404
 405 /* Set at runtime once GENET version is known */
 406 static const u8 *genet_dma_ring_regs;
 407
 408 static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
 409                                            unsigned int ring,
 410                                            enum dma_ring_reg r)
 411 {
 412         return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
 413                               (DMA_RING_SIZE * ring) +
 414                               genet_dma_ring_regs[r]);
 415 }
 416
 417 static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv,
 418                                              unsigned int ring, u32 val,
 419                                              enum dma_ring_reg r)
 420 {
 421         bcmgenet_writel(val, priv->base + GENET_TDMA_REG_OFF +
 422                         (DMA_RING_SIZE * ring) +
 423                         genet_dma_ring_regs[r]);
 424 }
 425
 426 static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
 427                                            unsigned int ring,
 428                                            enum dma_ring_reg r)
 429 {
 430         return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
 431                               (DMA_RING_SIZE * ring) +
 432                               genet_dma_ring_regs[r]);
 433 }
 434
 435 static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
 436                                              unsigned int ring, u32 val,
 437                                              enum dma_ring_reg r)
 438 {
 439         bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
 440                         (DMA_RING_SIZE * ring) +
 441                         genet_dma_ring_regs[r]);
 442 }
 443
 444 static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
 445 {
 446         u32 offset;
 447         u32 reg;
 448
 449         offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
 450         reg = bcmgenet_hfb_reg_readl(priv, offset);
 451         reg |= (1 << (f_index % 32));
 452         bcmgenet_hfb_reg_writel(priv, reg, offset);
 453         reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
 454         reg |= RBUF_HFB_EN;
 455         bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
 456 }
 457
 458 static void bcmgenet_hfb_disable_filter(struct bcmgenet_priv *priv, u32 f_index)
 459 {
 460         u32 offset, reg, reg1;
 461
 462         offset = HFB_FLT_ENABLE_V3PLUS;
 463         reg = bcmgenet_hfb_reg_readl(priv, offset);
 464         reg1 = bcmgenet_hfb_reg_readl(priv, offset + sizeof(u32));
 465         if  (f_index < 32) {
 466                 reg1 &= ~(1 << (f_index % 32));
 467                 bcmgenet_hfb_reg_writel(priv, reg1, offset + sizeof(u32));
 468         } else {
 469                 reg &= ~(1 << (f_index % 32));
 470                 bcmgenet_hfb_reg_writel(priv, reg, offset);
 471         }
 472         if (!reg && !reg1) {
 473                 reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
 474                 reg &= ~RBUF_HFB_EN;
 475                 bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
 476         }
 477 }
 478
 479 static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
 480                                                      u32 f_index, u32 rx_queue)
 481 {
 482         u32 offset;
 483         u32 reg;
 484
 485         offset = f_index / 8;
 486         reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
 487         reg &= ~(0xF << (4 * (f_index % 8)));
 488         reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
 489         bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
 490 }
 491
 492 static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
 493                                            u32 f_index, u32 f_length)
 494 {
 495         u32 offset;
 496         u32 reg;
 497
 498         offset = HFB_FLT_LEN_V3PLUS +
 499                  ((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
 500                  sizeof(u32);
 501         reg = bcmgenet_hfb_reg_readl(priv, offset);
 502         reg &= ~(0xFF << (8 * (f_index % 4)));
 503         reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
 504         bcmgenet_hfb_reg_writel(priv, reg, offset);
 505 }
 506
 507 static int bcmgenet_hfb_validate_mask(void *mask, size_t size)
 508 {
 509         while (size) {
 510                 switch (*(unsigned char *)mask++) {
 511                 case 0x00:
 512                 case 0x0f:
 513                 case 0xf0:
 514                 case 0xff:
 515                         size--;
 516                         continue;
 517                 default:
 518                         return -EINVAL;
 519                 }
 520         }
 521
 522         return 0;
 523 }
 524
 525 #define VALIDATE_MASK(x) \
 526         bcmgenet_hfb_validate_mask(&(x), sizeof(x))
 527
 528 static int bcmgenet_hfb_insert_data(struct bcmgenet_priv *priv, u32 f_index,
 529                                     u32 offset, void *val, void *mask,
 530                                     size_t size)
 531 {
 532         u32 index, tmp;
 533
 534         index = f_index * priv->hw_params->hfb_filter_size + offset / 2;
 535         tmp = bcmgenet_hfb_readl(priv, index * sizeof(u32));
 536
 537         while (size--) {
 538                 if (offset++ & 1) {
 539                         tmp &= ~0x300FF;
 540                         tmp |= (*(unsigned char *)val++);
 541                         switch ((*(unsigned char *)mask++)) {
 542                         case 0xFF:
 543                                 tmp |= 0x30000;
 544                                 break;
 545                         case 0xF0:
 546                                 tmp |= 0x20000;
 547                                 break;
 548                         case 0x0F:
 549                                 tmp |= 0x10000;
 550                                 break;
 551                         }
 552                         bcmgenet_hfb_writel(priv, tmp, index++ * sizeof(u32));
 553                         if (size)
 554                                 tmp = bcmgenet_hfb_readl(priv,
 555                                                          index * sizeof(u32));
 556                 } else {
 557                         tmp &= ~0xCFF00;
 558                         tmp |= (*(unsigned char *)val++) << 8;
 559                         switch ((*(unsigned char *)mask++)) {
 560                         case 0xFF:
 561                                 tmp |= 0xC0000;
 562                                 break;
 563                         case 0xF0:
 564                                 tmp |= 0x80000;
 565                                 break;
 566                         case 0x0F:
 567                                 tmp |= 0x40000;
 568                                 break;
 569                         }
 570                         if (!size)
 571                                 bcmgenet_hfb_writel(priv, tmp, index * sizeof(u32));
 572                 }
 573         }
 574
 575         return 0;
 576 }
 577
 578 static void bcmgenet_hfb_create_rxnfc_filter(struct bcmgenet_priv *priv,
 579                                              struct bcmgenet_rxnfc_rule *rule)
 580 {
 581         struct ethtool_rx_flow_spec *fs = &rule->fs;
 582         u32 offset = 0, f_length = 0, f;
 583         u8 val_8, mask_8;
 584         __be16 val_16;
 585         u16 mask_16;
 586         size_t size;
 587
 588         f = fs->location;
 589         if (fs->flow_type & FLOW_MAC_EXT) {
 590                 bcmgenet_hfb_insert_data(priv, f, 0,
 591                                          &fs->h_ext.h_dest, &fs->m_ext.h_dest,
 592                                          sizeof(fs->h_ext.h_dest));
 593         }
 594
 595         if (fs->flow_type & FLOW_EXT) {
 596                 if (fs->m_ext.vlan_etype ||
 597                     fs->m_ext.vlan_tci) {
 598                         bcmgenet_hfb_insert_data(priv, f, 12,
 599                                                  &fs->h_ext.vlan_etype,
 600                                                  &fs->m_ext.vlan_etype,
 601                                                  sizeof(fs->h_ext.vlan_etype));
 602                         bcmgenet_hfb_insert_data(priv, f, 14,
 603                                                  &fs->h_ext.vlan_tci,
 604                                                  &fs->m_ext.vlan_tci,
 605                                                  sizeof(fs->h_ext.vlan_tci));
 606                         offset += VLAN_HLEN;
 607                         f_length += DIV_ROUND_UP(VLAN_HLEN, 2);
 608                 }
 609         }
 610
 611         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
 612         case ETHER_FLOW:
 613                 f_length += DIV_ROUND_UP(ETH_HLEN, 2);
 614                 bcmgenet_hfb_insert_data(priv, f, 0,
 615                                          &fs->h_u.ether_spec.h_dest,
 616                                          &fs->m_u.ether_spec.h_dest,
 617                                          sizeof(fs->h_u.ether_spec.h_dest));
 618                 bcmgenet_hfb_insert_data(priv, f, ETH_ALEN,
 619                                          &fs->h_u.ether_spec.h_source,
 620                                          &fs->m_u.ether_spec.h_source,
 621                                          sizeof(fs->h_u.ether_spec.h_source));
 622                 bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
 623                                          &fs->h_u.ether_spec.h_proto,
 624                                          &fs->m_u.ether_spec.h_proto,
 625                                          sizeof(fs->h_u.ether_spec.h_proto));
 626                 break;
 627         case IP_USER_FLOW:
 628                 f_length += DIV_ROUND_UP(ETH_HLEN + 20, 2);
 629                 /* Specify IP Ether Type */
 630                 val_16 = htons(ETH_P_IP);
 631                 mask_16 = 0xFFFF;
 632                 bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
 633                                          &val_16, &mask_16, sizeof(val_16));
 634                 bcmgenet_hfb_insert_data(priv, f, 15 + offset,
 635                                          &fs->h_u.usr_ip4_spec.tos,
 636                                          &fs->m_u.usr_ip4_spec.tos,
 637                                          sizeof(fs->h_u.usr_ip4_spec.tos));
 638                 bcmgenet_hfb_insert_data(priv, f, 23 + offset,
 639                                          &fs->h_u.usr_ip4_spec.proto,
 640                                          &fs->m_u.usr_ip4_spec.proto,
 641                                          sizeof(fs->h_u.usr_ip4_spec.proto));
 642                 bcmgenet_hfb_insert_data(priv, f, 26 + offset,
 643                                          &fs->h_u.usr_ip4_spec.ip4src,
 644                                          &fs->m_u.usr_ip4_spec.ip4src,
 645                                          sizeof(fs->h_u.usr_ip4_spec.ip4src));
 646                 bcmgenet_hfb_insert_data(priv, f, 30 + offset,
 647                                          &fs->h_u.usr_ip4_spec.ip4dst,
 648                                          &fs->m_u.usr_ip4_spec.ip4dst,
 649                                          sizeof(fs->h_u.usr_ip4_spec.ip4dst));
 650                 if (!fs->m_u.usr_ip4_spec.l4_4_bytes)
 651                         break;
 652
 653                 /* Only supports 20 byte IPv4 header */
 654                 val_8 = 0x45;
 655                 mask_8 = 0xFF;
 656                 bcmgenet_hfb_insert_data(priv, f, ETH_HLEN + offset,
 657                                          &val_8, &mask_8,
 658                                          sizeof(val_8));
 659                 size = sizeof(fs->h_u.usr_ip4_spec.l4_4_bytes);
 660                 bcmgenet_hfb_insert_data(priv, f,
 661                                          ETH_HLEN + 20 + offset,
 662                                          &fs->h_u.usr_ip4_spec.l4_4_bytes,
 663                                          &fs->m_u.usr_ip4_spec.l4_4_bytes,
 664                                          size);
 665                 f_length += DIV_ROUND_UP(size, 2);
 666                 break;
 667         }
 668
 669         bcmgenet_hfb_set_filter_length(priv, f, 2 * f_length);
 670         if (!fs->ring_cookie || fs->ring_cookie == RX_CLS_FLOW_WAKE) {
 671                 /* Ring 0 flows can be handled by the default Descriptor Ring
 672                  * We'll map them to ring 0, but don't enable the filter
 673                  */
 674                 bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f, 0);
 675                 rule->state = BCMGENET_RXNFC_STATE_DISABLED;
 676         } else {
 677                 /* Other Rx rings are direct mapped here */
 678                 bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f,
 679                                                          fs->ring_cookie);
 680                 bcmgenet_hfb_enable_filter(priv, f);
 681                 rule->state = BCMGENET_RXNFC_STATE_ENABLED;
 682         }
 683 }
 684
 685 /* bcmgenet_hfb_clear
 686  *
 687  * Clear Hardware Filter Block and disable all filtering.
 688  */
 689 static void bcmgenet_hfb_clear_filter(struct bcmgenet_priv *priv, u32 f_index)
 690 {
 691         u32 base, i;
 692
 693         base = f_index * priv->hw_params->hfb_filter_size;
 694         for (i = 0; i < priv->hw_params->hfb_filter_size; i++)
 695                 bcmgenet_hfb_writel(priv, 0x0, (base + i) * sizeof(u32));
 696 }
 697
 698 static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
 699 {
 700         u32 i;
 701
 702         if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
 703                 return;
 704
 705         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_CTRL);
 706         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS);
 707         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS + 4);
 708
 709         for (i = DMA_INDEX2RING_0; i <= DMA_INDEX2RING_7; i++)
 710                 bcmgenet_rdma_writel(priv, 0x0, i);
 711
 712         for (i = 0; i < (priv->hw_params->hfb_filter_cnt / 4); i++)
 713                 bcmgenet_hfb_reg_writel(priv, 0x0,
 714                                         HFB_FLT_LEN_V3PLUS + i * sizeof(u32));
 715
 716         for (i = 0; i < priv->hw_params->hfb_filter_cnt; i++)
 717                 bcmgenet_hfb_clear_filter(priv, i);
 718 }
 719
 720 static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
 721 {
 722         int i;
 723
 724         INIT_LIST_HEAD(&priv->rxnfc_list);
 725         if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
 726                 return;
 727
 728         for (i = 0; i < MAX_NUM_OF_FS_RULES; i++) {
 729                 INIT_LIST_HEAD(&priv->rxnfc_rules[i].list);
 730                 priv->rxnfc_rules[i].state = BCMGENET_RXNFC_STATE_UNUSED;
 731         }
 732
 733         bcmgenet_hfb_clear(priv);
 734 }
 735
 736 static int bcmgenet_begin(struct net_device *dev)
 737 {
 738         struct bcmgenet_priv *priv = netdev_priv(dev);
 739
 740         /* Turn on the clock */
 741         return clk_prepare_enable(priv->clk);
 742 }
 743
 744 static void bcmgenet_complete(struct net_device *dev)
 745 {
 746         struct bcmgenet_priv *priv = netdev_priv(dev);
 747
 748         /* Turn off the clock */
 749         clk_disable_unprepare(priv->clk);
 750 }
 751
 752 static int bcmgenet_get_link_ksettings(struct net_device *dev,
 753                                        struct ethtool_link_ksettings *cmd)
 754 {
 755         if (!netif_running(dev))
 756                 return -EINVAL;
 757
 758         if (!dev->phydev)
 759                 return -ENODEV;
 760
 761         phy_ethtool_ksettings_get(dev->phydev, cmd);
 762
 763         return 0;
 764 }
 765
 766 static int bcmgenet_set_link_ksettings(struct net_device *dev,
 767                                        const struct ethtool_link_ksettings *cmd)
 768 {
 769         if (!netif_running(dev))
 770                 return -EINVAL;
 771
 772         if (!dev->phydev)
 773                 return -ENODEV;
 774
 775         return phy_ethtool_ksettings_set(dev->phydev, cmd);
 776 }
 777
 778 static int bcmgenet_set_features(struct net_device *dev,
 779                                  netdev_features_t features)
 780 {
 781         struct bcmgenet_priv *priv = netdev_priv(dev);
 782         u32 reg;
 783         int ret;
 784
 785         ret = clk_prepare_enable(priv->clk);
 786         if (ret)
 787                 return ret;
 788
 789         /* Make sure we reflect the value of CRC_CMD_FWD */
 790         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
 791         priv->crc_fwd_en = !!(reg & CMD_CRC_FWD);
 792
 793         clk_disable_unprepare(priv->clk);
 794
 795         return ret;
 796 }
 797
 798 static u32 bcmgenet_get_msglevel(struct net_device *dev)
 799 {
 800         struct bcmgenet_priv *priv = netdev_priv(dev);
 801
 802         return priv->msg_enable;
 803 }
 804
 805 static void bcmgenet_set_msglevel(struct net_device *dev, u32 level)
 806 {
 807         struct bcmgenet_priv *priv = netdev_priv(dev);
 808
 809         priv->msg_enable = level;
 810 }
 811
 812 static int bcmgenet_get_coalesce(struct net_device *dev,
 813                                  struct ethtool_coalesce *ec,
 814                                  struct kernel_ethtool_coalesce *kernel_coal,
 815                                  struct netlink_ext_ack *extack)
 816 {
 817         struct bcmgenet_priv *priv = netdev_priv(dev);
 818         struct bcmgenet_rx_ring *ring;
 819         unsigned int i;
 820
 821         ec->tx_max_coalesced_frames =
 822                 bcmgenet_tdma_ring_readl(priv, DESC_INDEX,
 823                                          DMA_MBUF_DONE_THRESH);
 824         ec->rx_max_coalesced_frames =
 825                 bcmgenet_rdma_ring_readl(priv, DESC_INDEX,
 826                                          DMA_MBUF_DONE_THRESH);
 827         ec->rx_coalesce_usecs =
 828                 bcmgenet_rdma_readl(priv, DMA_RING16_TIMEOUT) * 8192 / 1000;
 829
 830         for (i = 0; i < priv->hw_params->rx_queues; i++) {
 831                 ring = &priv->rx_rings[i];
 832                 ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
 833         }
 834         ring = &priv->rx_rings[DESC_INDEX];
 835         ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
 836
 837         return 0;
 838 }
 839
 840 static void bcmgenet_set_rx_coalesce(struct bcmgenet_rx_ring *ring,
 841                                      u32 usecs, u32 pkts)
 842 {
 843         struct bcmgenet_priv *priv = ring->priv;
 844         unsigned int i = ring->index;
 845         u32 reg;
 846
 847         bcmgenet_rdma_ring_writel(priv, i, pkts, DMA_MBUF_DONE_THRESH);
 848
 849         reg = bcmgenet_rdma_readl(priv, DMA_RING0_TIMEOUT + i);
 850         reg &= ~DMA_TIMEOUT_MASK;
 851         reg |= DIV_ROUND_UP(usecs * 1000, 8192);
 852         bcmgenet_rdma_writel(priv, reg, DMA_RING0_TIMEOUT + i);
 853 }
 854
 855 static void bcmgenet_set_ring_rx_coalesce(struct bcmgenet_rx_ring *ring,
 856                                           struct ethtool_coalesce *ec)
 857 {
 858         struct dim_cq_moder moder;
 859         u32 usecs, pkts;
 860
 861         ring->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 862         ring->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 863         usecs = ring->rx_coalesce_usecs;
 864         pkts = ring->rx_max_coalesced_frames;
 865
 866         if (ec->use_adaptive_rx_coalesce && !ring->dim.use_dim) {
 867                 moder = net_dim_get_def_rx_moderation(ring->dim.dim.mode);
 868                 usecs = moder.usec;
 869                 pkts = moder.pkts;
 870         }
 871
 872         ring->dim.use_dim = ec->use_adaptive_rx_coalesce;
 873         bcmgenet_set_rx_coalesce(ring, usecs, pkts);
 874 }
 875
 876 static int bcmgenet_set_coalesce(struct net_device *dev,
 877                                  struct ethtool_coalesce *ec,
 878                                  struct kernel_ethtool_coalesce *kernel_coal,
 879                                  struct netlink_ext_ack *extack)
 880 {
 881         struct bcmgenet_priv *priv = netdev_priv(dev);
 882         unsigned int i;
 883
 884         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 885          * divided by 1024, which yields roughly 8.192us, our maximum value
 886          * has to fit in the DMA_TIMEOUT_MASK (16 bits)
 887          */
 888         if (ec->tx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
 889             ec->tx_max_coalesced_frames == 0 ||
 890             ec->rx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
 891             ec->rx_coalesce_usecs > (DMA_TIMEOUT_MASK * 8) + 1)
 892                 return -EINVAL;
 893
 894         if (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)
 895                 return -EINVAL;
 896
 897         /* GENET TDMA hardware does not support a configurable timeout, but will
 898          * always generate an interrupt either after MBDONE packets have been
 899          * transmitted, or when the ring is empty.
 900          */
 901
 902         /* Program all TX queues with the same values, as there is no
 903          * ethtool knob to do coalescing on a per-queue basis
 904          */
 905         for (i = 0; i < priv->hw_params->tx_queues; i++)
 906                 bcmgenet_tdma_ring_writel(priv, i,
 907                                           ec->tx_max_coalesced_frames,
 908                                           DMA_MBUF_DONE_THRESH);
 909         bcmgenet_tdma_ring_writel(priv, DESC_INDEX,
 910                                   ec->tx_max_coalesced_frames,
 911                                   DMA_MBUF_DONE_THRESH);
 912
 913         for (i = 0; i < priv->hw_params->rx_queues; i++)
 914                 bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[i], ec);
 915         bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[DESC_INDEX], ec);
 916
 917         return 0;
 918 }
 919
 920 static void bcmgenet_get_pauseparam(struct net_device *dev,
 921                                     struct ethtool_pauseparam *epause)
 922 {
 923         struct bcmgenet_priv *priv;
 924         u32 umac_cmd;
 925
 926         priv = netdev_priv(dev);
 927
 928         epause->autoneg = priv->autoneg_pause;
 929
 930         if (netif_carrier_ok(dev)) {
 931                 /* report active state when link is up */
 932                 umac_cmd = bcmgenet_umac_readl(priv, UMAC_CMD);
 933                 epause->tx_pause = !(umac_cmd & CMD_TX_PAUSE_IGNORE);
 934                 epause->rx_pause = !(umac_cmd & CMD_RX_PAUSE_IGNORE);
 935         } else {
 936                 /* otherwise report stored settings */
 937                 epause->tx_pause = priv->tx_pause;
 938                 epause->rx_pause = priv->rx_pause;
 939         }
 940 }
 941
 942 static int bcmgenet_set_pauseparam(struct net_device *dev,
 943                                    struct ethtool_pauseparam *epause)
 944 {
 945         struct bcmgenet_priv *priv = netdev_priv(dev);
 946
 947         if (!dev->phydev)
 948                 return -ENODEV;
 949
 950         if (!phy_validate_pause(dev->phydev, epause))
 951                 return -EINVAL;
 952
 953         priv->autoneg_pause = !!epause->autoneg;
 954         priv->tx_pause = !!epause->tx_pause;
 955         priv->rx_pause = !!epause->rx_pause;
 956
 957         bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
 958
 959         return 0;
 960 }
 961
 962 /* standard ethtool support functions. */
 963 enum bcmgenet_stat_type {
 964         BCMGENET_STAT_NETDEV = -1,
 965         BCMGENET_STAT_MIB_RX,
 966         BCMGENET_STAT_MIB_TX,
 967         BCMGENET_STAT_RUNT,
 968         BCMGENET_STAT_MISC,
 969         BCMGENET_STAT_SOFT,
 970 };
 971
 972 struct bcmgenet_stats {
 973         char stat_string[ETH_GSTRING_LEN];
 974         int stat_sizeof;
 975         int stat_offset;
 976         enum bcmgenet_stat_type type;
 977         /* reg offset from UMAC base for misc counters */
 978         u16 reg_offset;
 979 };
 980
 981 #define STAT_NETDEV(m) { \
 982         .stat_string = __stringify(m), \
 983         .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \
 984         .stat_offset = offsetof(struct net_device_stats, m), \
 985         .type = BCMGENET_STAT_NETDEV, \
 986 }
 987
 988 #define STAT_GENET_MIB(str, m, _type) { \
 989         .stat_string = str, \
 990         .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
 991         .stat_offset = offsetof(struct bcmgenet_priv, m), \
 992         .type = _type, \
 993 }
 994
 995 #define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX)
 996 #define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX)
 997 #define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT)
 998 #define STAT_GENET_SOFT_MIB(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_SOFT)
 999
1000 #define STAT_GENET_MISC(str, m, offset) { \
1001         .stat_string = str, \
1002         .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
1003         .stat_offset = offsetof(struct bcmgenet_priv, m), \
1004         .type = BCMGENET_STAT_MISC, \
1005         .reg_offset = offset, \
1006 }
1007
1008 #define STAT_GENET_Q(num) \
1009         STAT_GENET_SOFT_MIB("txq" __stringify(num) "_packets", \
1010                         tx_rings[num].packets), \
1011         STAT_GENET_SOFT_MIB("txq" __stringify(num) "_bytes", \
1012                         tx_rings[num].bytes), \
1013         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_bytes", \
1014                         rx_rings[num].bytes),    \
1015         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_packets", \
1016                         rx_rings[num].packets), \
1017         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_errors", \
1018                         rx_rings[num].errors), \
1019         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_dropped", \
1020                         rx_rings[num].dropped)
1021
1022 /* There is a 0xC gap between the end of RX and beginning of TX stats and then
1023  * between the end of TX stats and the beginning of the RX RUNT
1024  */
1025 #define BCMGENET_STAT_OFFSET    0xc
1026
1027 /* Hardware counters must be kept in sync because the order/offset
1028  * is important here (order in structure declaration = order in hardware)
1029  */
1030 static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
1031         /* general stats */
1032         STAT_NETDEV(rx_packets),
1033         STAT_NETDEV(tx_packets),
1034         STAT_NETDEV(rx_bytes),
1035         STAT_NETDEV(tx_bytes),
1036         STAT_NETDEV(rx_errors),
1037         STAT_NETDEV(tx_errors),
1038         STAT_NETDEV(rx_dropped),
1039         STAT_NETDEV(tx_dropped),
1040         STAT_NETDEV(multicast),
1041         /* UniMAC RSV counters */
1042         STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
1043         STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
1044         STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
1045         STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
1046         STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
1047         STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
1048         STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
1049         STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
1050         STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
1051         STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
1052         STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt),
1053         STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes),
1054         STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca),
1055         STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca),
1056         STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs),
1057         STAT_GENET_MIB_RX("rx_control", mib.rx.cf),
1058         STAT_GENET_MIB_RX("rx_pause", mib.rx.pf),
1059         STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo),
1060         STAT_GENET_MIB_RX("rx_align", mib.rx.aln),
1061         STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr),
1062         STAT_GENET_MIB_RX("rx_code", mib.rx.cde),
1063         STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr),
1064         STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr),
1065         STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr),
1066         STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue),
1067         STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok),
1068         STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc),
1069         STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp),
1070         STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc),
1071         /* UniMAC TSV counters */
1072         STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
1073         STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
1074         STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
1075         STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
1076         STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
1077         STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
1078         STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
1079         STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
1080         STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
1081         STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
1082         STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts),
1083         STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca),
1084         STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca),
1085         STAT_GENET_MIB_TX("tx_pause", mib.tx.pf),
1086         STAT_GENET_MIB_TX("tx_control", mib.tx.cf),
1087         STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs),
1088         STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr),
1089         STAT_GENET_MIB_TX("tx_defer", mib.tx.drf),
1090         STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf),
1091         STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl),
1092         STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl),
1093         STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl),
1094         STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl),
1095         STAT_GENET_MIB_TX("tx_frags", mib.tx.frg),
1096         STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl),
1097         STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr),
1098         STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes),
1099         STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok),
1100         STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc),
1101         /* UniMAC RUNT counters */
1102         STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
1103         STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
1104         STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
1105         STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
1106         /* Misc UniMAC counters */
1107         STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
1108                         UMAC_RBUF_OVFL_CNT_V1),
1109         STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt,
1110                         UMAC_RBUF_ERR_CNT_V1),
1111         STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
1112         STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
1113         STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
1114         STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
1115         STAT_GENET_SOFT_MIB("tx_realloc_tsb", mib.tx_realloc_tsb),
1116         STAT_GENET_SOFT_MIB("tx_realloc_tsb_failed",
1117                             mib.tx_realloc_tsb_failed),
1118         /* Per TX queues */
1119         STAT_GENET_Q(0),
1120         STAT_GENET_Q(1),
1121         STAT_GENET_Q(2),
1122         STAT_GENET_Q(3),
1123         STAT_GENET_Q(16),
1124 };
1125
1126 #define BCMGENET_STATS_LEN      ARRAY_SIZE(bcmgenet_gstrings_stats)
1127
1128 static void bcmgenet_get_drvinfo(struct net_device *dev,
1129                                  struct ethtool_drvinfo *info)
1130 {
1131         strscpy(info->driver, "bcmgenet", sizeof(info->driver));
1132 }
1133
1134 static int bcmgenet_get_sset_count(struct net_device *dev, int string_set)
1135 {
1136         switch (string_set) {
1137         case ETH_SS_STATS:
1138                 return BCMGENET_STATS_LEN;
1139         default:
1140                 return -EOPNOTSUPP;
1141         }
1142 }
1143
1144 static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
1145                                  u8 *data)
1146 {
1147         int i;
1148
1149         switch (stringset) {
1150         case ETH_SS_STATS:
1151                 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1152                         memcpy(data + i * ETH_GSTRING_LEN,
1153                                bcmgenet_gstrings_stats[i].stat_string,
1154                                ETH_GSTRING_LEN);
1155                 }
1156                 break;
1157         }
1158 }
1159
1160 static u32 bcmgenet_update_stat_misc(struct bcmgenet_priv *priv, u16 offset)
1161 {
1162         u16 new_offset;
1163         u32 val;
1164
1165         switch (offset) {
1166         case UMAC_RBUF_OVFL_CNT_V1:
1167                 if (GENET_IS_V2(priv))
1168                         new_offset = RBUF_OVFL_CNT_V2;
1169                 else
1170                         new_offset = RBUF_OVFL_CNT_V3PLUS;
1171
1172                 val = bcmgenet_rbuf_readl(priv, new_offset);
1173                 /* clear if overflowed */
1174                 if (val == ~0)
1175                         bcmgenet_rbuf_writel(priv, 0, new_offset);
1176                 break;
1177         case UMAC_RBUF_ERR_CNT_V1:
1178                 if (GENET_IS_V2(priv))
1179                         new_offset = RBUF_ERR_CNT_V2;
1180                 else
1181                         new_offset = RBUF_ERR_CNT_V3PLUS;
1182
1183                 val = bcmgenet_rbuf_readl(priv, new_offset);
1184                 /* clear if overflowed */
1185                 if (val == ~0)
1186                         bcmgenet_rbuf_writel(priv, 0, new_offset);
1187                 break;
1188         default:
1189                 val = bcmgenet_umac_readl(priv, offset);
1190                 /* clear if overflowed */
1191                 if (val == ~0)
1192                         bcmgenet_umac_writel(priv, 0, offset);
1193                 break;
1194         }
1195
1196         return val;
1197 }
1198
1199 static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
1200 {
1201         int i, j = 0;
1202
1203         for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1204                 const struct bcmgenet_stats *s;
1205                 u8 offset = 0;
1206                 u32 val = 0;
1207                 char *p;
1208
1209                 s = &bcmgenet_gstrings_stats[i];
1210                 switch (s->type) {
1211                 case BCMGENET_STAT_NETDEV:
1212                 case BCMGENET_STAT_SOFT:
1213                         continue;
1214                 case BCMGENET_STAT_RUNT:
1215                         offset += BCMGENET_STAT_OFFSET;
1216                         fallthrough;
1217                 case BCMGENET_STAT_MIB_TX:
1218                         offset += BCMGENET_STAT_OFFSET;
1219                         fallthrough;
1220                 case BCMGENET_STAT_MIB_RX:
1221                         val = bcmgenet_umac_readl(priv,
1222                                                   UMAC_MIB_START + j + offset);
1223                         offset = 0;     /* Reset Offset */
1224                         break;
1225                 case BCMGENET_STAT_MISC:
1226                         if (GENET_IS_V1(priv)) {
1227                                 val = bcmgenet_umac_readl(priv, s->reg_offset);
1228                                 /* clear if overflowed */
1229                                 if (val == ~0)
1230                                         bcmgenet_umac_writel(priv, 0,
1231                                                              s->reg_offset);
1232                         } else {
1233                                 val = bcmgenet_update_stat_misc(priv,
1234                                                                 s->reg_offset);
1235                         }
1236                         break;
1237                 }
1238
1239                 j += s->stat_sizeof;
1240                 p = (char *)priv + s->stat_offset;
1241                 *(u32 *)p = val;
1242         }
1243 }
1244
1245 static void bcmgenet_get_ethtool_stats(struct net_device *dev,
1246                                        struct ethtool_stats *stats,
1247                                        u64 *data)
1248 {
1249         struct bcmgenet_priv *priv = netdev_priv(dev);
1250         int i;
1251
1252         if (netif_running(dev))
1253                 bcmgenet_update_mib_counters(priv);
1254
1255         dev->netdev_ops->ndo_get_stats(dev);
1256
1257         for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1258                 const struct bcmgenet_stats *s;
1259                 char *p;
1260
1261                 s = &bcmgenet_gstrings_stats[i];
1262                 if (s->type == BCMGENET_STAT_NETDEV)
1263                         p = (char *)&dev->stats;
1264                 else
1265                         p = (char *)priv;
1266                 p += s->stat_offset;
1267                 if (sizeof(unsigned long) != sizeof(u32) &&
1268                     s->stat_sizeof == sizeof(unsigned long))
1269                         data[i] = *(unsigned long *)p;
1270                 else
1271                         data[i] = *(u32 *)p;
1272         }
1273 }
1274
1275 void bcmgenet_eee_enable_set(struct net_device *dev, bool enable,
1276                              bool tx_lpi_enabled)
1277 {
1278         struct bcmgenet_priv *priv = netdev_priv(dev);
1279         u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
1280         u32 reg;
1281
1282         if (enable && !priv->clk_eee_enabled) {
1283                 clk_prepare_enable(priv->clk_eee);
1284                 priv->clk_eee_enabled = true;
1285         }
1286
1287         reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
1288         if (enable)
1289                 reg |= EEE_EN;
1290         else
1291                 reg &= ~EEE_EN;
1292         bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
1293
1294         /* Enable EEE and switch to a 27Mhz clock automatically */
1295         reg = bcmgenet_readl(priv->base + off);
1296         if (tx_lpi_enabled)
1297                 reg |= TBUF_EEE_EN | TBUF_PM_EN;
1298         else
1299                 reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
1300         bcmgenet_writel(reg, priv->base + off);
1301
1302         /* Do the same for thing for RBUF */
1303         reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
1304         if (enable)
1305                 reg |= RBUF_EEE_EN | RBUF_PM_EN;
1306         else
1307                 reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
1308         bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
1309
1310         if (!enable && priv->clk_eee_enabled) {
1311                 clk_disable_unprepare(priv->clk_eee);
1312                 priv->clk_eee_enabled = false;
1313         }
1314
1315         priv->eee.eee_enabled = enable;
1316         priv->eee.tx_lpi_enabled = tx_lpi_enabled;
1317 }
1318
1319 static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_keee *e)
1320 {
1321         struct bcmgenet_priv *priv = netdev_priv(dev);
1322         struct ethtool_keee *p = &priv->eee;
1323
1324         if (GENET_IS_V1(priv))
1325                 return -EOPNOTSUPP;
1326
1327         if (!dev->phydev)
1328                 return -ENODEV;
1329
1330         e->tx_lpi_enabled = p->tx_lpi_enabled;
1331         e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
1332
1333         return phy_ethtool_get_eee(dev->phydev, e);
1334 }
1335
1336 static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_keee *e)
1337 {
1338         struct bcmgenet_priv *priv = netdev_priv(dev);
1339         struct ethtool_keee *p = &priv->eee;
1340         bool active;
1341
1342         if (GENET_IS_V1(priv))
1343                 return -EOPNOTSUPP;
1344
1345         if (!dev->phydev)
1346                 return -ENODEV;
1347
1348         p->eee_enabled = e->eee_enabled;
1349
1350         if (!p->eee_enabled) {
1351                 bcmgenet_eee_enable_set(dev, false, false);
1352         } else {
1353                 active = phy_init_eee(dev->phydev, false) >= 0;
1354                 bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
1355                 bcmgenet_eee_enable_set(dev, active, e->tx_lpi_enabled);
1356         }
1357
1358         return phy_ethtool_set_eee(dev->phydev, e);
1359 }
1360
1361 static int bcmgenet_validate_flow(struct net_device *dev,
1362                                   struct ethtool_rxnfc *cmd)
1363 {
1364         struct ethtool_usrip4_spec *l4_mask;
1365         struct ethhdr *eth_mask;
1366
1367         if (cmd->fs.location >= MAX_NUM_OF_FS_RULES &&
1368             cmd->fs.location != RX_CLS_LOC_ANY) {
1369                 netdev_err(dev, "rxnfc: Invalid location (%d)\n",
1370                            cmd->fs.location);
1371                 return -EINVAL;
1372         }
1373
1374         switch (cmd->fs.flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
1375         case IP_USER_FLOW:
1376                 l4_mask = &cmd->fs.m_u.usr_ip4_spec;
1377                 /* don't allow mask which isn't valid */
1378                 if (VALIDATE_MASK(l4_mask->ip4src) ||
1379                     VALIDATE_MASK(l4_mask->ip4dst) ||
1380                     VALIDATE_MASK(l4_mask->l4_4_bytes) ||
1381                     VALIDATE_MASK(l4_mask->proto) ||
1382                     VALIDATE_MASK(l4_mask->ip_ver) ||
1383                     VALIDATE_MASK(l4_mask->tos)) {
1384                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1385                         return -EINVAL;
1386                 }
1387                 break;
1388         case ETHER_FLOW:
1389                 eth_mask = &cmd->fs.m_u.ether_spec;
1390                 /* don't allow mask which isn't valid */
1391                 if (VALIDATE_MASK(eth_mask->h_dest) ||
1392                     VALIDATE_MASK(eth_mask->h_source) ||
1393                     VALIDATE_MASK(eth_mask->h_proto)) {
1394                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1395                         return -EINVAL;
1396                 }
1397                 break;
1398         default:
1399                 netdev_err(dev, "rxnfc: Unsupported flow type (0x%x)\n",
1400                            cmd->fs.flow_type);
1401                 return -EINVAL;
1402         }
1403
1404         if ((cmd->fs.flow_type & FLOW_EXT)) {
1405                 /* don't allow mask which isn't valid */
1406                 if (VALIDATE_MASK(cmd->fs.m_ext.vlan_etype) ||
1407                     VALIDATE_MASK(cmd->fs.m_ext.vlan_tci)) {
1408                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1409                         return -EINVAL;
1410                 }
1411                 if (cmd->fs.m_ext.data[0] || cmd->fs.m_ext.data[1]) {
1412                         netdev_err(dev, "rxnfc: user-def not supported\n");
1413                         return -EINVAL;
1414                 }
1415         }
1416
1417         if ((cmd->fs.flow_type & FLOW_MAC_EXT)) {
1418                 /* don't allow mask which isn't valid */
1419                 if (VALIDATE_MASK(cmd->fs.m_ext.h_dest)) {
1420                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1421                         return -EINVAL;
1422                 }
1423         }
1424
1425         return 0;
1426 }
1427
1428 static int bcmgenet_insert_flow(struct net_device *dev,
1429                                 struct ethtool_rxnfc *cmd)
1430 {
1431         struct bcmgenet_priv *priv = netdev_priv(dev);
1432         struct bcmgenet_rxnfc_rule *loc_rule;
1433         int err, i;
1434
1435         if (priv->hw_params->hfb_filter_size < 128) {
1436                 netdev_err(dev, "rxnfc: Not supported by this device\n");
1437                 return -EINVAL;
1438         }
1439
1440         if (cmd->fs.ring_cookie > priv->hw_params->rx_queues &&
1441             cmd->fs.ring_cookie != RX_CLS_FLOW_WAKE) {
1442                 netdev_err(dev, "rxnfc: Unsupported action (%llu)\n",
1443                            cmd->fs.ring_cookie);
1444                 return -EINVAL;
1445         }
1446
1447         err = bcmgenet_validate_flow(dev, cmd);
1448         if (err)
1449                 return err;
1450
1451         if (cmd->fs.location == RX_CLS_LOC_ANY) {
1452                 list_for_each_entry(loc_rule, &priv->rxnfc_list, list) {
1453                         cmd->fs.location = loc_rule->fs.location;
1454                         err = memcmp(&loc_rule->fs, &cmd->fs,
1455                                      sizeof(struct ethtool_rx_flow_spec));
1456                         if (!err)
1457                                 /* rule exists so return current location */
1458                                 return 0;
1459                 }
1460                 for (i = 0; i < MAX_NUM_OF_FS_RULES; i++) {
1461                         loc_rule = &priv->rxnfc_rules[i];
1462                         if (loc_rule->state == BCMGENET_RXNFC_STATE_UNUSED) {
1463                                 cmd->fs.location = i;
1464                                 break;
1465                         }
1466                 }
1467                 if (i == MAX_NUM_OF_FS_RULES) {
1468                         cmd->fs.location = RX_CLS_LOC_ANY;
1469                         return -ENOSPC;
1470                 }
1471         } else {
1472                 loc_rule = &priv->rxnfc_rules[cmd->fs.location];
1473         }
1474         if (loc_rule->state == BCMGENET_RXNFC_STATE_ENABLED)
1475                 bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
1476         if (loc_rule->state != BCMGENET_RXNFC_STATE_UNUSED) {
1477                 list_del(&loc_rule->list);
1478                 bcmgenet_hfb_clear_filter(priv, cmd->fs.location);
1479         }
1480         loc_rule->state = BCMGENET_RXNFC_STATE_UNUSED;
1481         memcpy(&loc_rule->fs, &cmd->fs,
1482                sizeof(struct ethtool_rx_flow_spec));
1483
1484         bcmgenet_hfb_create_rxnfc_filter(priv, loc_rule);
1485
1486         list_add_tail(&loc_rule->list, &priv->rxnfc_list);
1487
1488         return 0;
1489 }
1490
1491 static int bcmgenet_delete_flow(struct net_device *dev,
1492                                 struct ethtool_rxnfc *cmd)
1493 {
1494         struct bcmgenet_priv *priv = netdev_priv(dev);
1495         struct bcmgenet_rxnfc_rule *rule;
1496         int err = 0;
1497
1498         if (cmd->fs.location >= MAX_NUM_OF_FS_RULES)
1499                 return -EINVAL;
1500
1501         rule = &priv->rxnfc_rules[cmd->fs.location];
1502         if (rule->state == BCMGENET_RXNFC_STATE_UNUSED) {
1503                 err =  -ENOENT;
1504                 goto out;
1505         }
1506
1507         if (rule->state == BCMGENET_RXNFC_STATE_ENABLED)
1508                 bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
1509         if (rule->state != BCMGENET_RXNFC_STATE_UNUSED) {
1510                 list_del(&rule->list);
1511                 bcmgenet_hfb_clear_filter(priv, cmd->fs.location);
1512         }
1513         rule->state = BCMGENET_RXNFC_STATE_UNUSED;
1514         memset(&rule->fs, 0, sizeof(struct ethtool_rx_flow_spec));
1515
1516 out:
1517         return err;
1518 }
1519
1520 static int bcmgenet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1521 {
1522         struct bcmgenet_priv *priv = netdev_priv(dev);
1523         int err = 0;
1524
1525         switch (cmd->cmd) {
1526         case ETHTOOL_SRXCLSRLINS:
1527                 err = bcmgenet_insert_flow(dev, cmd);
1528                 break;
1529         case ETHTOOL_SRXCLSRLDEL:
1530                 err = bcmgenet_delete_flow(dev, cmd);
1531                 break;
1532         default:
1533                 netdev_warn(priv->dev, "Unsupported ethtool command. (%d)\n",
1534                             cmd->cmd);
1535                 return -EINVAL;
1536         }
1537
1538         return err;
1539 }
1540
1541 static int bcmgenet_get_flow(struct net_device *dev, struct ethtool_rxnfc *cmd,
1542                              int loc)
1543 {
1544         struct bcmgenet_priv *priv = netdev_priv(dev);
1545         struct bcmgenet_rxnfc_rule *rule;
1546         int err = 0;
1547
1548         if (loc < 0 || loc >= MAX_NUM_OF_FS_RULES)
1549                 return -EINVAL;
1550
1551         rule = &priv->rxnfc_rules[loc];
1552         if (rule->state == BCMGENET_RXNFC_STATE_UNUSED)
1553                 err = -ENOENT;
1554         else
1555                 memcpy(&cmd->fs, &rule->fs,
1556                        sizeof(struct ethtool_rx_flow_spec));
1557
1558         return err;
1559 }
1560
1561 static int bcmgenet_get_num_flows(struct bcmgenet_priv *priv)
1562 {
1563         struct list_head *pos;
1564         int res = 0;
1565
1566         list_for_each(pos, &priv->rxnfc_list)
1567                 res++;
1568
1569         return res;
1570 }
1571
1572 static int bcmgenet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1573                               u32 *rule_locs)
1574 {
1575         struct bcmgenet_priv *priv = netdev_priv(dev);
1576         struct bcmgenet_rxnfc_rule *rule;
1577         int err = 0;
1578         int i = 0;
1579
1580         switch (cmd->cmd) {
1581         case ETHTOOL_GRXRINGS:
1582                 cmd->data = priv->hw_params->rx_queues ?: 1;
1583                 break;
1584         case ETHTOOL_GRXCLSRLCNT:
1585                 cmd->rule_cnt = bcmgenet_get_num_flows(priv);
1586                 cmd->data = MAX_NUM_OF_FS_RULES | RX_CLS_LOC_SPECIAL;
1587                 break;
1588         case ETHTOOL_GRXCLSRULE:
1589                 err = bcmgenet_get_flow(dev, cmd, cmd->fs.location);
1590                 break;
1591         case ETHTOOL_GRXCLSRLALL:
1592                 list_for_each_entry(rule, &priv->rxnfc_list, list)
1593                         if (i < cmd->rule_cnt)
1594                                 rule_locs[i++] = rule->fs.location;
1595                 cmd->rule_cnt = i;
1596                 cmd->data = MAX_NUM_OF_FS_RULES;
1597                 break;
1598         default:
1599                 err = -EOPNOTSUPP;
1600                 break;
1601         }
1602
1603         return err;
1604 }
1605
1606 /* standard ethtool support functions. */
1607 static const struct ethtool_ops bcmgenet_ethtool_ops = {
1608         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
1609                                      ETHTOOL_COALESCE_MAX_FRAMES |
1610                                      ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
1611         .begin                  = bcmgenet_begin,
1612         .complete               = bcmgenet_complete,
1613         .get_strings            = bcmgenet_get_strings,
1614         .get_sset_count         = bcmgenet_get_sset_count,
1615         .get_ethtool_stats      = bcmgenet_get_ethtool_stats,
1616         .get_drvinfo            = bcmgenet_get_drvinfo,
1617         .get_link               = ethtool_op_get_link,
1618         .get_msglevel           = bcmgenet_get_msglevel,
1619         .set_msglevel           = bcmgenet_set_msglevel,
1620         .get_wol                = bcmgenet_get_wol,
1621         .set_wol                = bcmgenet_set_wol,
1622         .get_eee                = bcmgenet_get_eee,
1623         .set_eee                = bcmgenet_set_eee,
1624         .nway_reset             = phy_ethtool_nway_reset,
1625         .get_coalesce           = bcmgenet_get_coalesce,
1626         .set_coalesce           = bcmgenet_set_coalesce,
1627         .get_link_ksettings     = bcmgenet_get_link_ksettings,
1628         .set_link_ksettings     = bcmgenet_set_link_ksettings,
1629         .get_ts_info            = ethtool_op_get_ts_info,
1630         .get_rxnfc              = bcmgenet_get_rxnfc,
1631         .set_rxnfc              = bcmgenet_set_rxnfc,
1632         .get_pauseparam         = bcmgenet_get_pauseparam,
1633         .set_pauseparam         = bcmgenet_set_pauseparam,
1634 };
1635
1636 /* Power down the unimac, based on mode. */
1637 static int bcmgenet_power_down(struct bcmgenet_priv *priv,
1638                                 enum bcmgenet_power_mode mode)
1639 {
1640         int ret = 0;
1641         u32 reg;
1642
1643         switch (mode) {
1644         case GENET_POWER_CABLE_SENSE:
1645                 phy_detach(priv->dev->phydev);
1646                 break;
1647
1648         case GENET_POWER_WOL_MAGIC:
1649                 ret = bcmgenet_wol_power_down_cfg(priv, mode);
1650                 break;
1651
1652         case GENET_POWER_PASSIVE:
1653                 /* Power down LED */
1654                 if (priv->hw_params->flags & GENET_HAS_EXT) {
1655                         reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
1656                         if (GENET_IS_V5(priv) && !priv->ephy_16nm)
1657                                 reg |= EXT_PWR_DOWN_PHY_EN |
1658                                        EXT_PWR_DOWN_PHY_RD |
1659                                        EXT_PWR_DOWN_PHY_SD |
1660                                        EXT_PWR_DOWN_PHY_RX |
1661                                        EXT_PWR_DOWN_PHY_TX |
1662                                        EXT_IDDQ_GLBL_PWR;
1663                         else
1664                                 reg |= EXT_PWR_DOWN_PHY;
1665
1666                         reg |= (EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS);
1667                         bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1668
1669                         bcmgenet_phy_power_set(priv->dev, false);
1670                 }
1671                 break;
1672         default:
1673                 break;
1674         }
1675
1676         return ret;
1677 }
1678
1679 static void bcmgenet_power_up(struct bcmgenet_priv *priv,
1680                               enum bcmgenet_power_mode mode)
1681 {
1682         u32 reg;
1683
1684         if (!(priv->hw_params->flags & GENET_HAS_EXT))
1685                 return;
1686
1687         reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
1688
1689         switch (mode) {
1690         case GENET_POWER_PASSIVE:
1691                 reg &= ~(EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS |
1692                          EXT_ENERGY_DET_MASK);
1693                 if (GENET_IS_V5(priv) && !priv->ephy_16nm) {
1694                         reg &= ~(EXT_PWR_DOWN_PHY_EN |
1695                                  EXT_PWR_DOWN_PHY_RD |
1696                                  EXT_PWR_DOWN_PHY_SD |
1697                                  EXT_PWR_DOWN_PHY_RX |
1698                                  EXT_PWR_DOWN_PHY_TX |
1699                                  EXT_IDDQ_GLBL_PWR);
1700                         reg |=   EXT_PHY_RESET;
1701                         bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1702                         mdelay(1);
1703
1704                         reg &=  ~EXT_PHY_RESET;
1705                 } else {
1706                         reg &= ~EXT_PWR_DOWN_PHY;
1707                         reg |= EXT_PWR_DN_EN_LD;
1708                 }
1709                 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1710                 bcmgenet_phy_power_set(priv->dev, true);
1711                 break;
1712
1713         case GENET_POWER_CABLE_SENSE:
1714                 /* enable APD */
1715                 if (!GENET_IS_V5(priv)) {
1716                         reg |= EXT_PWR_DN_EN_LD;
1717                         bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1718                 }
1719                 break;
1720         case GENET_POWER_WOL_MAGIC:
1721                 bcmgenet_wol_power_up_cfg(priv, mode);
1722                 return;
1723         default:
1724                 break;
1725         }
1726 }
1727
1728 static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv,
1729                                          struct bcmgenet_tx_ring *ring)
1730 {
1731         struct enet_cb *tx_cb_ptr;
1732
1733         tx_cb_ptr = ring->cbs;
1734         tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
1735
1736         /* Advancing local write pointer */
1737         if (ring->write_ptr == ring->end_ptr)
1738                 ring->write_ptr = ring->cb_ptr;
1739         else
1740                 ring->write_ptr++;
1741
1742         return tx_cb_ptr;
1743 }
1744
1745 static struct enet_cb *bcmgenet_put_txcb(struct bcmgenet_priv *priv,
1746                                          struct bcmgenet_tx_ring *ring)
1747 {
1748         struct enet_cb *tx_cb_ptr;
1749
1750         tx_cb_ptr = ring->cbs;
1751         tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
1752
1753         /* Rewinding local write pointer */
1754         if (ring->write_ptr == ring->cb_ptr)
1755                 ring->write_ptr = ring->end_ptr;
1756         else
1757                 ring->write_ptr--;
1758
1759         return tx_cb_ptr;
1760 }
1761
1762 static inline void bcmgenet_rx_ring16_int_disable(struct bcmgenet_rx_ring *ring)
1763 {
1764         bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
1765                                  INTRL2_CPU_MASK_SET);
1766 }
1767
1768 static inline void bcmgenet_rx_ring16_int_enable(struct bcmgenet_rx_ring *ring)
1769 {
1770         bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
1771                                  INTRL2_CPU_MASK_CLEAR);
1772 }
1773
1774 static inline void bcmgenet_rx_ring_int_disable(struct bcmgenet_rx_ring *ring)
1775 {
1776         bcmgenet_intrl2_1_writel(ring->priv,
1777                                  1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
1778                                  INTRL2_CPU_MASK_SET);
1779 }
1780
1781 static inline void bcmgenet_rx_ring_int_enable(struct bcmgenet_rx_ring *ring)
1782 {
1783         bcmgenet_intrl2_1_writel(ring->priv,
1784                                  1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
1785                                  INTRL2_CPU_MASK_CLEAR);
1786 }
1787
1788 static inline void bcmgenet_tx_ring16_int_disable(struct bcmgenet_tx_ring *ring)
1789 {
1790         bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
1791                                  INTRL2_CPU_MASK_SET);
1792 }
1793
1794 static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_tx_ring *ring)
1795 {
1796         bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
1797                                  INTRL2_CPU_MASK_CLEAR);
1798 }
1799
1800 static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_tx_ring *ring)
1801 {
1802         bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
1803                                  INTRL2_CPU_MASK_CLEAR);
1804 }
1805
1806 static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_tx_ring *ring)
1807 {
1808         bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
1809                                  INTRL2_CPU_MASK_SET);
1810 }
1811
1812 /* Simple helper to free a transmit control block's resources
1813  * Returns an skb when the last transmit control block associated with the
1814  * skb is freed.  The skb should be freed by the caller if necessary.
1815  */
1816 static struct sk_buff *bcmgenet_free_tx_cb(struct device *dev,
1817                                            struct enet_cb *cb)
1818 {
1819         struct sk_buff *skb;
1820
1821         skb = cb->skb;
1822
1823         if (skb) {
1824                 cb->skb = NULL;
1825                 if (cb == GENET_CB(skb)->first_cb)
1826                         dma_unmap_single(dev, dma_unmap_addr(cb, dma_addr),
1827                                          dma_unmap_len(cb, dma_len),
1828                                          DMA_TO_DEVICE);
1829                 else
1830                         dma_unmap_page(dev, dma_unmap_addr(cb, dma_addr),
1831                                        dma_unmap_len(cb, dma_len),
1832                                        DMA_TO_DEVICE);
1833                 dma_unmap_addr_set(cb, dma_addr, 0);
1834
1835                 if (cb == GENET_CB(skb)->last_cb)
1836                         return skb;
1837
1838         } else if (dma_unmap_addr(cb, dma_addr)) {
1839                 dma_unmap_page(dev,
1840                                dma_unmap_addr(cb, dma_addr),
1841                                dma_unmap_len(cb, dma_len),
1842                                DMA_TO_DEVICE);
1843                 dma_unmap_addr_set(cb, dma_addr, 0);
1844         }
1845
1846         return NULL;
1847 }
1848
1849 /* Simple helper to free a receive control block's resources */
1850 static struct sk_buff *bcmgenet_free_rx_cb(struct device *dev,
1851                                            struct enet_cb *cb)
1852 {
1853         struct sk_buff *skb;
1854
1855         skb = cb->skb;
1856         cb->skb = NULL;
1857
1858         if (dma_unmap_addr(cb, dma_addr)) {
1859                 dma_unmap_single(dev, dma_unmap_addr(cb, dma_addr),
1860                                  dma_unmap_len(cb, dma_len), DMA_FROM_DEVICE);
1861                 dma_unmap_addr_set(cb, dma_addr, 0);
1862         }
1863
1864         return skb;
1865 }
1866
1867 /* Unlocked version of the reclaim routine */
1868 static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
1869                                           struct bcmgenet_tx_ring *ring)
1870 {
1871         struct bcmgenet_priv *priv = netdev_priv(dev);
1872         unsigned int txbds_processed = 0;
1873         unsigned int bytes_compl = 0;
1874         unsigned int pkts_compl = 0;
1875         unsigned int txbds_ready;
1876         unsigned int c_index;
1877         struct sk_buff *skb;
1878
1879         /* Clear status before servicing to reduce spurious interrupts */
1880         if (ring->index == DESC_INDEX)
1881                 bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_TXDMA_DONE,
1882                                          INTRL2_CPU_CLEAR);
1883         else
1884                 bcmgenet_intrl2_1_writel(priv, (1 << ring->index),
1885                                          INTRL2_CPU_CLEAR);
1886
1887         /* Compute how many buffers are transmitted since last xmit call */
1888         c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX)
1889                 & DMA_C_INDEX_MASK;
1890         txbds_ready = (c_index - ring->c_index) & DMA_C_INDEX_MASK;
1891
1892         netif_dbg(priv, tx_done, dev,
1893                   "%s ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
1894                   __func__, ring->index, ring->c_index, c_index, txbds_ready);
1895
1896         /* Reclaim transmitted buffers */
1897         while (txbds_processed < txbds_ready) {
1898                 skb = bcmgenet_free_tx_cb(&priv->pdev->dev,
1899                                           &priv->tx_cbs[ring->clean_ptr]);
1900                 if (skb) {
1901                         pkts_compl++;
1902                         bytes_compl += GENET_CB(skb)->bytes_sent;
1903                         dev_consume_skb_any(skb);
1904                 }
1905
1906                 txbds_processed++;
1907                 if (likely(ring->clean_ptr < ring->end_ptr))
1908                         ring->clean_ptr++;
1909                 else
1910                         ring->clean_ptr = ring->cb_ptr;
1911         }
1912
1913         ring->free_bds += txbds_processed;
1914         ring->c_index = c_index;
1915
1916         ring->packets += pkts_compl;
1917         ring->bytes += bytes_compl;
1918
1919         netdev_tx_completed_queue(netdev_get_tx_queue(dev, ring->queue),
1920                                   pkts_compl, bytes_compl);
1921
1922         return txbds_processed;
1923 }
1924
1925 static unsigned int bcmgenet_tx_reclaim(struct net_device *dev,
1926                                 struct bcmgenet_tx_ring *ring)
1927 {
1928         unsigned int released;
1929
1930         spin_lock_bh(&ring->lock);
1931         released = __bcmgenet_tx_reclaim(dev, ring);
1932         spin_unlock_bh(&ring->lock);
1933
1934         return released;
1935 }
1936
1937 static int bcmgenet_tx_poll(struct napi_struct *napi, int budget)
1938 {
1939         struct bcmgenet_tx_ring *ring =
1940                 container_of(napi, struct bcmgenet_tx_ring, napi);
1941         unsigned int work_done = 0;
1942         struct netdev_queue *txq;
1943
1944         spin_lock(&ring->lock);
1945         work_done = __bcmgenet_tx_reclaim(ring->priv->dev, ring);
1946         if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
1947                 txq = netdev_get_tx_queue(ring->priv->dev, ring->queue);
1948                 netif_tx_wake_queue(txq);
1949         }
1950         spin_unlock(&ring->lock);
1951
1952         if (work_done == 0) {
1953                 napi_complete(napi);
1954                 ring->int_enable(ring);
1955
1956                 return 0;
1957         }
1958
1959         return budget;
1960 }
1961
1962 static void bcmgenet_tx_reclaim_all(struct net_device *dev)
1963 {
1964         struct bcmgenet_priv *priv = netdev_priv(dev);
1965         int i;
1966
1967         if (netif_is_multiqueue(dev)) {
1968                 for (i = 0; i < priv->hw_params->tx_queues; i++)
1969                         bcmgenet_tx_reclaim(dev, &priv->tx_rings[i]);
1970         }
1971
1972         bcmgenet_tx_reclaim(dev, &priv->tx_rings[DESC_INDEX]);
1973 }
1974
1975 /* Reallocate the SKB to put enough headroom in front of it and insert
1976  * the transmit checksum offsets in the descriptors
1977  */
1978 static struct sk_buff *bcmgenet_add_tsb(struct net_device *dev,
1979                                         struct sk_buff *skb)
1980 {
1981         struct bcmgenet_priv *priv = netdev_priv(dev);
1982         struct status_64 *status = NULL;
1983         struct sk_buff *new_skb;
1984         u16 offset;
1985         u8 ip_proto;
1986         __be16 ip_ver;
1987         u32 tx_csum_info;
1988
1989         if (unlikely(skb_headroom(skb) < sizeof(*status))) {
1990                 /* If 64 byte status block enabled, must make sure skb has
1991                  * enough headroom for us to insert 64B status block.
1992                  */
1993                 new_skb = skb_realloc_headroom(skb, sizeof(*status));
1994                 if (!new_skb) {
1995                         dev_kfree_skb_any(skb);
1996                         priv->mib.tx_realloc_tsb_failed++;
1997                         dev->stats.tx_dropped++;
1998                         return NULL;
1999                 }
2000                 dev_consume_skb_any(skb);
2001                 skb = new_skb;
2002                 priv->mib.tx_realloc_tsb++;
2003         }
2004
2005         skb_push(skb, sizeof(*status));
2006         status = (struct status_64 *)skb->data;
2007
2008         if (skb->ip_summed  == CHECKSUM_PARTIAL) {
2009                 ip_ver = skb->protocol;
2010                 switch (ip_ver) {
2011                 case htons(ETH_P_IP):
2012                         ip_proto = ip_hdr(skb)->protocol;
2013                         break;
2014                 case htons(ETH_P_IPV6):
2015                         ip_proto = ipv6_hdr(skb)->nexthdr;
2016                         break;
2017                 default:
2018                         /* don't use UDP flag */
2019                         ip_proto = 0;
2020                         break;
2021                 }
2022
2023                 offset = skb_checksum_start_offset(skb) - sizeof(*status);
2024                 tx_csum_info = (offset << STATUS_TX_CSUM_START_SHIFT) |
2025                                 (offset + skb->csum_offset) |
2026                                 STATUS_TX_CSUM_LV;
2027
2028                 /* Set the special UDP flag for UDP */
2029                 if (ip_proto == IPPROTO_UDP)
2030                         tx_csum_info |= STATUS_TX_CSUM_PROTO_UDP;
2031
2032                 status->tx_csum_info = tx_csum_info;
2033         }
2034
2035         return skb;
2036 }
2037
2038 static void bcmgenet_hide_tsb(struct sk_buff *skb)
2039 {
2040         __skb_pull(skb, sizeof(struct status_64));
2041 }
2042
2043 static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
2044 {
2045         struct bcmgenet_priv *priv = netdev_priv(dev);
2046         struct device *kdev = &priv->pdev->dev;
2047         struct bcmgenet_tx_ring *ring = NULL;
2048         struct enet_cb *tx_cb_ptr;
2049         struct netdev_queue *txq;
2050         int nr_frags, index;
2051         dma_addr_t mapping;
2052         unsigned int size;
2053         skb_frag_t *frag;
2054         u32 len_stat;
2055         int ret;
2056         int i;
2057
2058         index = skb_get_queue_mapping(skb);
2059         /* Mapping strategy:
2060          * queue_mapping = 0, unclassified, packet xmited through ring16
2061          * queue_mapping = 1, goes to ring 0. (highest priority queue
2062          * queue_mapping = 2, goes to ring 1.
2063          * queue_mapping = 3, goes to ring 2.
2064          * queue_mapping = 4, goes to ring 3.
2065          */
2066         if (index == 0)
2067                 index = DESC_INDEX;
2068         else
2069                 index -= 1;
2070
2071         ring = &priv->tx_rings[index];
2072         txq = netdev_get_tx_queue(dev, ring->queue);
2073
2074         nr_frags = skb_shinfo(skb)->nr_frags;
2075
2076         spin_lock(&ring->lock);
2077         if (ring->free_bds <= (nr_frags + 1)) {
2078                 if (!netif_tx_queue_stopped(txq))
2079                         netif_tx_stop_queue(txq);
2080                 ret = NETDEV_TX_BUSY;
2081                 goto out;
2082         }
2083
2084         /* Retain how many bytes will be sent on the wire, without TSB inserted
2085          * by transmit checksum offload
2086          */
2087         GENET_CB(skb)->bytes_sent = skb->len;
2088
2089         /* add the Transmit Status Block */
2090         skb = bcmgenet_add_tsb(dev, skb);
2091         if (!skb) {
2092                 ret = NETDEV_TX_OK;
2093                 goto out;
2094         }
2095
2096         for (i = 0; i <= nr_frags; i++) {
2097                 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
2098
2099                 BUG_ON(!tx_cb_ptr);
2100
2101                 if (!i) {
2102                         /* Transmit single SKB or head of fragment list */
2103                         GENET_CB(skb)->first_cb = tx_cb_ptr;
2104                         size = skb_headlen(skb);
2105                         mapping = dma_map_single(kdev, skb->data, size,
2106                                                  DMA_TO_DEVICE);
2107                 } else {
2108                         /* xmit fragment */
2109                         frag = &skb_shinfo(skb)->frags[i - 1];
2110                         size = skb_frag_size(frag);
2111                         mapping = skb_frag_dma_map(kdev, frag, 0, size,
2112                                                    DMA_TO_DEVICE);
2113                 }
2114
2115                 ret = dma_mapping_error(kdev, mapping);
2116                 if (ret) {
2117                         priv->mib.tx_dma_failed++;
2118                         netif_err(priv, tx_err, dev, "Tx DMA map failed\n");
2119                         ret = NETDEV_TX_OK;
2120                         goto out_unmap_frags;
2121                 }
2122                 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
2123                 dma_unmap_len_set(tx_cb_ptr, dma_len, size);
2124
2125                 tx_cb_ptr->skb = skb;
2126
2127                 len_stat = (size << DMA_BUFLENGTH_SHIFT) |
2128                            (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT);
2129
2130                 /* Note: if we ever change from DMA_TX_APPEND_CRC below we
2131                  * will need to restore software padding of "runt" packets
2132                  */
2133                 len_stat |= DMA_TX_APPEND_CRC;
2134
2135                 if (!i) {
2136                         len_stat |= DMA_SOP;
2137                         if (skb->ip_summed == CHECKSUM_PARTIAL)
2138                                 len_stat |= DMA_TX_DO_CSUM;
2139                 }
2140                 if (i == nr_frags)
2141                         len_stat |= DMA_EOP;
2142
2143                 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, len_stat);
2144         }
2145
2146         GENET_CB(skb)->last_cb = tx_cb_ptr;
2147
2148         bcmgenet_hide_tsb(skb);
2149         skb_tx_timestamp(skb);
2150
2151         /* Decrement total BD count and advance our write pointer */
2152         ring->free_bds -= nr_frags + 1;
2153         ring->prod_index += nr_frags + 1;
2154         ring->prod_index &= DMA_P_INDEX_MASK;
2155
2156         netdev_tx_sent_queue(txq, GENET_CB(skb)->bytes_sent);
2157
2158         if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
2159                 netif_tx_stop_queue(txq);
2160
2161         if (!netdev_xmit_more() || netif_xmit_stopped(txq))
2162                 /* Packets are ready, update producer index */
2163                 bcmgenet_tdma_ring_writel(priv, ring->index,
2164                                           ring->prod_index, TDMA_PROD_INDEX);
2165 out:
2166         spin_unlock(&ring->lock);
2167
2168         return ret;
2169
2170 out_unmap_frags:
2171         /* Back up for failed control block mapping */
2172         bcmgenet_put_txcb(priv, ring);
2173
2174         /* Unmap successfully mapped control blocks */
2175         while (i-- > 0) {
2176                 tx_cb_ptr = bcmgenet_put_txcb(priv, ring);
2177                 bcmgenet_free_tx_cb(kdev, tx_cb_ptr);
2178         }
2179
2180         dev_kfree_skb(skb);
2181         goto out;
2182 }
2183
2184 static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
2185                                           struct enet_cb *cb)
2186 {
2187         struct device *kdev = &priv->pdev->dev;
2188         struct sk_buff *skb;
2189         struct sk_buff *rx_skb;
2190         dma_addr_t mapping;
2191
2192         /* Allocate a new Rx skb */
2193         skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT,
2194                                  GFP_ATOMIC | __GFP_NOWARN);
2195         if (!skb) {
2196                 priv->mib.alloc_rx_buff_failed++;
2197                 netif_err(priv, rx_err, priv->dev,
2198                           "%s: Rx skb allocation failed\n", __func__);
2199                 return NULL;
2200         }
2201
2202         /* DMA-map the new Rx skb */
2203         mapping = dma_map_single(kdev, skb->data, priv->rx_buf_len,
2204                                  DMA_FROM_DEVICE);
2205         if (dma_mapping_error(kdev, mapping)) {
2206                 priv->mib.rx_dma_failed++;
2207                 dev_kfree_skb_any(skb);
2208                 netif_err(priv, rx_err, priv->dev,
2209                           "%s: Rx skb DMA mapping failed\n", __func__);
2210                 return NULL;
2211         }
2212
2213         /* Grab the current Rx skb from the ring and DMA-unmap it */
2214         rx_skb = bcmgenet_free_rx_cb(kdev, cb);
2215
2216         /* Put the new Rx skb on the ring */
2217         cb->skb = skb;
2218         dma_unmap_addr_set(cb, dma_addr, mapping);
2219         dma_unmap_len_set(cb, dma_len, priv->rx_buf_len);
2220         dmadesc_set_addr(priv, cb->bd_addr, mapping);
2221
2222         /* Return the current Rx skb to caller */
2223         return rx_skb;
2224 }
2225
2226 /* bcmgenet_desc_rx - descriptor based rx process.
2227  * this could be called from bottom half, or from NAPI polling method.
2228  */
2229 static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
2230                                      unsigned int budget)
2231 {
2232         struct bcmgenet_priv *priv = ring->priv;
2233         struct net_device *dev = priv->dev;
2234         struct enet_cb *cb;
2235         struct sk_buff *skb;
2236         u32 dma_length_status;
2237         unsigned long dma_flag;
2238         int len;
2239         unsigned int rxpktprocessed = 0, rxpkttoprocess;
2240         unsigned int bytes_processed = 0;
2241         unsigned int p_index, mask;
2242         unsigned int discards;
2243
2244         /* Clear status before servicing to reduce spurious interrupts */
2245         if (ring->index == DESC_INDEX) {
2246                 bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_DONE,
2247                                          INTRL2_CPU_CLEAR);
2248         } else {
2249                 mask = 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index);
2250                 bcmgenet_intrl2_1_writel(priv,
2251                                          mask,
2252                                          INTRL2_CPU_CLEAR);
2253         }
2254
2255         p_index = bcmgenet_rdma_ring_readl(priv, ring->index, RDMA_PROD_INDEX);
2256
2257         discards = (p_index >> DMA_P_INDEX_DISCARD_CNT_SHIFT) &
2258                    DMA_P_INDEX_DISCARD_CNT_MASK;
2259         if (discards > ring->old_discards) {
2260                 discards = discards - ring->old_discards;
2261                 ring->errors += discards;
2262                 ring->old_discards += discards;
2263
2264                 /* Clear HW register when we reach 75% of maximum 0xFFFF */
2265                 if (ring->old_discards >= 0xC000) {
2266                         ring->old_discards = 0;
2267                         bcmgenet_rdma_ring_writel(priv, ring->index, 0,
2268                                                   RDMA_PROD_INDEX);
2269                 }
2270         }
2271
2272         p_index &= DMA_P_INDEX_MASK;
2273         rxpkttoprocess = (p_index - ring->c_index) & DMA_C_INDEX_MASK;
2274
2275         netif_dbg(priv, rx_status, dev,
2276                   "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
2277
2278         while ((rxpktprocessed < rxpkttoprocess) &&
2279                (rxpktprocessed < budget)) {
2280                 struct status_64 *status;
2281                 __be16 rx_csum;
2282
2283                 cb = &priv->rx_cbs[ring->read_ptr];
2284                 skb = bcmgenet_rx_refill(priv, cb);
2285
2286                 if (unlikely(!skb)) {
2287                         ring->dropped++;
2288                         goto next;
2289                 }
2290
2291                 status = (struct status_64 *)skb->data;
2292                 dma_length_status = status->length_status;
2293                 if (dev->features & NETIF_F_RXCSUM) {
2294                         rx_csum = (__force __be16)(status->rx_csum & 0xffff);
2295                         if (rx_csum) {
2296                                 skb->csum = (__force __wsum)ntohs(rx_csum);
2297                                 skb->ip_summed = CHECKSUM_COMPLETE;
2298                         }
2299                 }
2300
2301                 /* DMA flags and length are still valid no matter how
2302                  * we got the Receive Status Vector (64B RSB or register)
2303                  */
2304                 dma_flag = dma_length_status & 0xffff;
2305                 len = dma_length_status >> DMA_BUFLENGTH_SHIFT;
2306
2307                 netif_dbg(priv, rx_status, dev,
2308                           "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n",
2309                           __func__, p_index, ring->c_index,
2310                           ring->read_ptr, dma_length_status);
2311
2312                 if (unlikely(len > RX_BUF_LENGTH)) {
2313                         netif_err(priv, rx_status, dev, "oversized packet\n");
2314                         dev->stats.rx_length_errors++;
2315                         dev->stats.rx_errors++;
2316                         dev_kfree_skb_any(skb);
2317                         goto next;
2318                 }
2319
2320                 if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
2321                         netif_err(priv, rx_status, dev,
2322                                   "dropping fragmented packet!\n");
2323                         ring->errors++;
2324                         dev_kfree_skb_any(skb);
2325                         goto next;
2326                 }
2327
2328                 /* report errors */
2329                 if (unlikely(dma_flag & (DMA_RX_CRC_ERROR |
2330                                                 DMA_RX_OV |
2331                                                 DMA_RX_NO |
2332                                                 DMA_RX_LG |
2333                                                 DMA_RX_RXER))) {
2334                         netif_err(priv, rx_status, dev, "dma_flag=0x%x\n",
2335                                   (unsigned int)dma_flag);
2336                         if (dma_flag & DMA_RX_CRC_ERROR)
2337                                 dev->stats.rx_crc_errors++;
2338                         if (dma_flag & DMA_RX_OV)
2339                                 dev->stats.rx_over_errors++;
2340                         if (dma_flag & DMA_RX_NO)
2341                                 dev->stats.rx_frame_errors++;
2342                         if (dma_flag & DMA_RX_LG)
2343                                 dev->stats.rx_length_errors++;
2344                         dev->stats.rx_errors++;
2345                         dev_kfree_skb_any(skb);
2346                         goto next;
2347                 } /* error packet */
2348
2349                 skb_put(skb, len);
2350
2351                 /* remove RSB and hardware 2bytes added for IP alignment */
2352                 skb_pull(skb, 66);
2353                 len -= 66;
2354
2355                 if (priv->crc_fwd_en) {
2356                         skb_trim(skb, len - ETH_FCS_LEN);
2357                         len -= ETH_FCS_LEN;
2358                 }
2359
2360                 bytes_processed += len;
2361
2362                 /*Finish setting up the received SKB and send it to the kernel*/
2363                 skb->protocol = eth_type_trans(skb, priv->dev);
2364                 ring->packets++;
2365                 ring->bytes += len;
2366                 if (dma_flag & DMA_RX_MULT)
2367                         dev->stats.multicast++;
2368
2369                 /* Notify kernel */
2370                 napi_gro_receive(&ring->napi, skb);
2371                 netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
2372
2373 next:
2374                 rxpktprocessed++;
2375                 if (likely(ring->read_ptr < ring->end_ptr))
2376                         ring->read_ptr++;
2377                 else
2378                         ring->read_ptr = ring->cb_ptr;
2379
2380                 ring->c_index = (ring->c_index + 1) & DMA_C_INDEX_MASK;
2381                 bcmgenet_rdma_ring_writel(priv, ring->index, ring->c_index, RDMA_CONS_INDEX);
2382         }
2383
2384         ring->dim.bytes = bytes_processed;
2385         ring->dim.packets = rxpktprocessed;
2386
2387         return rxpktprocessed;
2388 }
2389
2390 /* Rx NAPI polling method */
2391 static int bcmgenet_rx_poll(struct napi_struct *napi, int budget)
2392 {
2393         struct bcmgenet_rx_ring *ring = container_of(napi,
2394                         struct bcmgenet_rx_ring, napi);
2395         struct dim_sample dim_sample = {};
2396         unsigned int work_done;
2397
2398         work_done = bcmgenet_desc_rx(ring, budget);
2399
2400         if (work_done < budget) {
2401                 napi_complete_done(napi, work_done);
2402                 ring->int_enable(ring);
2403         }
2404
2405         if (ring->dim.use_dim) {
2406                 dim_update_sample(ring->dim.event_ctr, ring->dim.packets,
2407                                   ring->dim.bytes, &dim_sample);
2408                 net_dim(&ring->dim.dim, dim_sample);
2409         }
2410
2411         return work_done;
2412 }
2413
2414 static void bcmgenet_dim_work(struct work_struct *work)
2415 {
2416         struct dim *dim = container_of(work, struct dim, work);
2417         struct bcmgenet_net_dim *ndim =
2418                         container_of(dim, struct bcmgenet_net_dim, dim);
2419         struct bcmgenet_rx_ring *ring =
2420                         container_of(ndim, struct bcmgenet_rx_ring, dim);
2421         struct dim_cq_moder cur_profile =
2422                         net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
2423
2424         bcmgenet_set_rx_coalesce(ring, cur_profile.usec, cur_profile.pkts);
2425         dim->state = DIM_START_MEASURE;
2426 }
2427
2428 /* Assign skb to RX DMA descriptor. */
2429 static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
2430                                      struct bcmgenet_rx_ring *ring)
2431 {
2432         struct enet_cb *cb;
2433         struct sk_buff *skb;
2434         int i;
2435
2436         netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
2437
2438         /* loop here for each buffer needing assign */
2439         for (i = 0; i < ring->size; i++) {
2440                 cb = ring->cbs + i;
2441                 skb = bcmgenet_rx_refill(priv, cb);
2442                 if (skb)
2443                         dev_consume_skb_any(skb);
2444                 if (!cb->skb)
2445                         return -ENOMEM;
2446         }
2447
2448         return 0;
2449 }
2450
2451 static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
2452 {
2453         struct sk_buff *skb;
2454         struct enet_cb *cb;
2455         int i;
2456
2457         for (i = 0; i < priv->num_rx_bds; i++) {
2458                 cb = &priv->rx_cbs[i];
2459
2460                 skb = bcmgenet_free_rx_cb(&priv->pdev->dev, cb);
2461                 if (skb)
2462                         dev_consume_skb_any(skb);
2463         }
2464 }
2465
2466 static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable)
2467 {
2468         u32 reg;
2469
2470         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
2471         if (reg & CMD_SW_RESET)
2472                 return;
2473         if (enable)
2474                 reg |= mask;
2475         else
2476                 reg &= ~mask;
2477         bcmgenet_umac_writel(priv, reg, UMAC_CMD);
2478
2479         /* UniMAC stops on a packet boundary, wait for a full-size packet
2480          * to be processed
2481          */
2482         if (enable == 0)
2483                 usleep_range(1000, 2000);
2484 }
2485
2486 static void reset_umac(struct bcmgenet_priv *priv)
2487 {
2488         /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */
2489         bcmgenet_rbuf_ctrl_set(priv, 0);
2490         udelay(10);
2491
2492         /* issue soft reset and disable MAC while updating its registers */
2493         bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD);
2494         udelay(2);
2495 }
2496
2497 static void bcmgenet_intr_disable(struct bcmgenet_priv *priv)
2498 {
2499         /* Mask all interrupts.*/
2500         bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
2501         bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
2502         bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
2503         bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
2504 }
2505
2506 static void bcmgenet_link_intr_enable(struct bcmgenet_priv *priv)
2507 {
2508         u32 int0_enable = 0;
2509
2510         /* Monitor cable plug/unplugged event for internal PHY, external PHY
2511          * and MoCA PHY
2512          */
2513         if (priv->internal_phy) {
2514                 int0_enable |= UMAC_IRQ_LINK_EVENT;
2515                 if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv))
2516                         int0_enable |= UMAC_IRQ_PHY_DET_R;
2517         } else if (priv->ext_phy) {
2518                 int0_enable |= UMAC_IRQ_LINK_EVENT;
2519         } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
2520                 if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)
2521                         int0_enable |= UMAC_IRQ_LINK_EVENT;
2522         }
2523         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
2524 }
2525
2526 static void init_umac(struct bcmgenet_priv *priv)
2527 {
2528         struct device *kdev = &priv->pdev->dev;
2529         u32 reg;
2530         u32 int0_enable = 0;
2531
2532         dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n");
2533
2534         reset_umac(priv);
2535
2536         /* clear tx/rx counter */
2537         bcmgenet_umac_writel(priv,
2538                              MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT,
2539                              UMAC_MIB_CTRL);
2540         bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL);
2541
2542         bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2543
2544         /* init tx registers, enable TSB */
2545         reg = bcmgenet_tbuf_ctrl_get(priv);
2546         reg |= TBUF_64B_EN;
2547         bcmgenet_tbuf_ctrl_set(priv, reg);
2548
2549         /* init rx registers, enable ip header optimization and RSB */
2550         reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
2551         reg |= RBUF_ALIGN_2B | RBUF_64B_EN;
2552         bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL);
2553
2554         /* enable rx checksumming */
2555         reg = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
2556         reg |= RBUF_RXCHK_EN | RBUF_L3_PARSE_DIS;
2557         /* If UniMAC forwards CRC, we need to skip over it to get
2558          * a valid CHK bit to be set in the per-packet status word
2559          */
2560         if (priv->crc_fwd_en)
2561                 reg |= RBUF_SKIP_FCS;
2562         else
2563                 reg &= ~RBUF_SKIP_FCS;
2564         bcmgenet_rbuf_writel(priv, reg, RBUF_CHK_CTRL);
2565
2566         if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv))
2567                 bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL);
2568
2569         bcmgenet_intr_disable(priv);
2570
2571         /* Configure backpressure vectors for MoCA */
2572         if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
2573                 reg = bcmgenet_bp_mc_get(priv);
2574                 reg |= BIT(priv->hw_params->bp_in_en_shift);
2575
2576                 /* bp_mask: back pressure mask */
2577                 if (netif_is_multiqueue(priv->dev))
2578                         reg |= priv->hw_params->bp_in_mask;
2579                 else
2580                         reg &= ~priv->hw_params->bp_in_mask;
2581                 bcmgenet_bp_mc_set(priv, reg);
2582         }
2583
2584         /* Enable MDIO interrupts on GENET v3+ */
2585         if (priv->hw_params->flags & GENET_HAS_MDIO_INTR)
2586                 int0_enable |= (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
2587
2588         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
2589
2590         dev_dbg(kdev, "done init umac\n");
2591 }
2592
2593 static void bcmgenet_init_dim(struct bcmgenet_rx_ring *ring,
2594                               void (*cb)(struct work_struct *work))
2595 {
2596         struct bcmgenet_net_dim *dim = &ring->dim;
2597
2598         INIT_WORK(&dim->dim.work, cb);
2599         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
2600         dim->event_ctr = 0;
2601         dim->packets = 0;
2602         dim->bytes = 0;
2603 }
2604
2605 static void bcmgenet_init_rx_coalesce(struct bcmgenet_rx_ring *ring)
2606 {
2607         struct bcmgenet_net_dim *dim = &ring->dim;
2608         struct dim_cq_moder moder;
2609         u32 usecs, pkts;
2610
2611         usecs = ring->rx_coalesce_usecs;
2612         pkts = ring->rx_max_coalesced_frames;
2613
2614         /* If DIM was enabled, re-apply default parameters */
2615         if (dim->use_dim) {
2616                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
2617                 usecs = moder.usec;
2618                 pkts = moder.pkts;
2619         }
2620
2621         bcmgenet_set_rx_coalesce(ring, usecs, pkts);
2622 }
2623
2624 /* Initialize a Tx ring along with corresponding hardware registers */
2625 static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv,
2626                                   unsigned int index, unsigned int size,
2627                                   unsigned int start_ptr, unsigned int end_ptr)
2628 {
2629         struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
2630         u32 words_per_bd = WORDS_PER_BD(priv);
2631         u32 flow_period_val = 0;
2632
2633         spin_lock_init(&ring->lock);
2634         ring->priv = priv;
2635         ring->index = index;
2636         if (index == DESC_INDEX) {
2637                 ring->queue = 0;
2638                 ring->int_enable = bcmgenet_tx_ring16_int_enable;
2639                 ring->int_disable = bcmgenet_tx_ring16_int_disable;
2640         } else {
2641                 ring->queue = index + 1;
2642                 ring->int_enable = bcmgenet_tx_ring_int_enable;
2643                 ring->int_disable = bcmgenet_tx_ring_int_disable;
2644         }
2645         ring->cbs = priv->tx_cbs + start_ptr;
2646         ring->size = size;
2647         ring->clean_ptr = start_ptr;
2648         ring->c_index = 0;
2649         ring->free_bds = size;
2650         ring->write_ptr = start_ptr;
2651         ring->cb_ptr = start_ptr;
2652         ring->end_ptr = end_ptr - 1;
2653         ring->prod_index = 0;
2654
2655         /* Set flow period for ring != 16 */
2656         if (index != DESC_INDEX)
2657                 flow_period_val = ENET_MAX_MTU_SIZE << 16;
2658
2659         bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX);
2660         bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX);
2661         bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
2662         /* Disable rate control for now */
2663         bcmgenet_tdma_ring_writel(priv, index, flow_period_val,
2664                                   TDMA_FLOW_PERIOD);
2665         bcmgenet_tdma_ring_writel(priv, index,
2666                                   ((size << DMA_RING_SIZE_SHIFT) |
2667                                    RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
2668
2669         /* Set start and end address, read and write pointers */
2670         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2671                                   DMA_START_ADDR);
2672         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2673                                   TDMA_READ_PTR);
2674         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2675                                   TDMA_WRITE_PTR);
2676         bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
2677                                   DMA_END_ADDR);
2678
2679         /* Initialize Tx NAPI */
2680         netif_napi_add_tx(priv->dev, &ring->napi, bcmgenet_tx_poll);
2681 }
2682
2683 /* Initialize a RDMA ring */
2684 static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
2685                                  unsigned int index, unsigned int size,
2686                                  unsigned int start_ptr, unsigned int end_ptr)
2687 {
2688         struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
2689         u32 words_per_bd = WORDS_PER_BD(priv);
2690         int ret;
2691
2692         ring->priv = priv;
2693         ring->index = index;
2694         if (index == DESC_INDEX) {
2695                 ring->int_enable = bcmgenet_rx_ring16_int_enable;
2696                 ring->int_disable = bcmgenet_rx_ring16_int_disable;
2697         } else {
2698                 ring->int_enable = bcmgenet_rx_ring_int_enable;
2699                 ring->int_disable = bcmgenet_rx_ring_int_disable;
2700         }
2701         ring->cbs = priv->rx_cbs + start_ptr;
2702         ring->size = size;
2703         ring->c_index = 0;
2704         ring->read_ptr = start_ptr;
2705         ring->cb_ptr = start_ptr;
2706         ring->end_ptr = end_ptr - 1;
2707
2708         ret = bcmgenet_alloc_rx_buffers(priv, ring);
2709         if (ret)
2710                 return ret;
2711
2712         bcmgenet_init_dim(ring, bcmgenet_dim_work);
2713         bcmgenet_init_rx_coalesce(ring);
2714
2715         /* Initialize Rx NAPI */
2716         netif_napi_add(priv->dev, &ring->napi, bcmgenet_rx_poll);
2717
2718         bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX);
2719         bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX);
2720         bcmgenet_rdma_ring_writel(priv, index,
2721                                   ((size << DMA_RING_SIZE_SHIFT) |
2722                                    RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
2723         bcmgenet_rdma_ring_writel(priv, index,
2724                                   (DMA_FC_THRESH_LO <<
2725                                    DMA_XOFF_THRESHOLD_SHIFT) |
2726                                    DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
2727
2728         /* Set start and end address, read and write pointers */
2729         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2730                                   DMA_START_ADDR);
2731         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2732                                   RDMA_READ_PTR);
2733         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2734                                   RDMA_WRITE_PTR);
2735         bcmgenet_rdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
2736                                   DMA_END_ADDR);
2737
2738         return ret;
2739 }
2740
2741 static void bcmgenet_enable_tx_napi(struct bcmgenet_priv *priv)
2742 {
2743         unsigned int i;
2744         struct bcmgenet_tx_ring *ring;
2745
2746         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2747                 ring = &priv->tx_rings[i];
2748                 napi_enable(&ring->napi);
2749                 ring->int_enable(ring);
2750         }
2751
2752         ring = &priv->tx_rings[DESC_INDEX];
2753         napi_enable(&ring->napi);
2754         ring->int_enable(ring);
2755 }
2756
2757 static void bcmgenet_disable_tx_napi(struct bcmgenet_priv *priv)
2758 {
2759         unsigned int i;
2760         struct bcmgenet_tx_ring *ring;
2761
2762         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2763                 ring = &priv->tx_rings[i];
2764                 napi_disable(&ring->napi);
2765         }
2766
2767         ring = &priv->tx_rings[DESC_INDEX];
2768         napi_disable(&ring->napi);
2769 }
2770
2771 static void bcmgenet_fini_tx_napi(struct bcmgenet_priv *priv)
2772 {
2773         unsigned int i;
2774         struct bcmgenet_tx_ring *ring;
2775
2776         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2777                 ring = &priv->tx_rings[i];
2778                 netif_napi_del(&ring->napi);
2779         }
2780
2781         ring = &priv->tx_rings[DESC_INDEX];
2782         netif_napi_del(&ring->napi);
2783 }
2784
2785 /* Initialize Tx queues
2786  *
2787  * Queues 0-3 are priority-based, each one has 32 descriptors,
2788  * with queue 0 being the highest priority queue.
2789  *
2790  * Queue 16 is the default Tx queue with
2791  * GENET_Q16_TX_BD_CNT = 256 - 4 * 32 = 128 descriptors.
2792  *
2793  * The transmit control block pool is then partitioned as follows:
2794  * - Tx queue 0 uses tx_cbs[0..31]
2795  * - Tx queue 1 uses tx_cbs[32..63]
2796  * - Tx queue 2 uses tx_cbs[64..95]
2797  * - Tx queue 3 uses tx_cbs[96..127]
2798  * - Tx queue 16 uses tx_cbs[128..255]
2799  */
2800 static void bcmgenet_init_tx_queues(struct net_device *dev)
2801 {
2802         struct bcmgenet_priv *priv = netdev_priv(dev);
2803         u32 i, dma_enable;
2804         u32 dma_ctrl, ring_cfg;
2805         u32 dma_priority[3] = {0, 0, 0};
2806
2807         dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL);
2808         dma_enable = dma_ctrl & DMA_EN;
2809         dma_ctrl &= ~DMA_EN;
2810         bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2811
2812         dma_ctrl = 0;
2813         ring_cfg = 0;
2814
2815         /* Enable strict priority arbiter mode */
2816         bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
2817
2818         /* Initialize Tx priority queues */
2819         for (i = 0; i < priv->hw_params->tx_queues; i++) {
2820                 bcmgenet_init_tx_ring(priv, i, priv->hw_params->tx_bds_per_q,
2821                                       i * priv->hw_params->tx_bds_per_q,
2822                                       (i + 1) * priv->hw_params->tx_bds_per_q);
2823                 ring_cfg |= (1 << i);
2824                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2825                 dma_priority[DMA_PRIO_REG_INDEX(i)] |=
2826                         ((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
2827         }
2828
2829         /* Initialize Tx default queue 16 */
2830         bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_Q16_TX_BD_CNT,
2831                               priv->hw_params->tx_queues *
2832                               priv->hw_params->tx_bds_per_q,
2833                               TOTAL_DESC);
2834         ring_cfg |= (1 << DESC_INDEX);
2835         dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2836         dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
2837                 ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
2838                  DMA_PRIO_REG_SHIFT(DESC_INDEX));
2839
2840         /* Set Tx queue priorities */
2841         bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
2842         bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
2843         bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
2844
2845         /* Enable Tx queues */
2846         bcmgenet_tdma_writel(priv, ring_cfg, DMA_RING_CFG);
2847
2848         /* Enable Tx DMA */
2849         if (dma_enable)
2850                 dma_ctrl |= DMA_EN;
2851         bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2852 }
2853
2854 static void bcmgenet_enable_rx_napi(struct bcmgenet_priv *priv)
2855 {
2856         unsigned int i;
2857         struct bcmgenet_rx_ring *ring;
2858
2859         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2860                 ring = &priv->rx_rings[i];
2861                 napi_enable(&ring->napi);
2862                 ring->int_enable(ring);
2863         }
2864
2865         ring = &priv->rx_rings[DESC_INDEX];
2866         napi_enable(&ring->napi);
2867         ring->int_enable(ring);
2868 }
2869
2870 static void bcmgenet_disable_rx_napi(struct bcmgenet_priv *priv)
2871 {
2872         unsigned int i;
2873         struct bcmgenet_rx_ring *ring;
2874
2875         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2876                 ring = &priv->rx_rings[i];
2877                 napi_disable(&ring->napi);
2878                 cancel_work_sync(&ring->dim.dim.work);
2879         }
2880
2881         ring = &priv->rx_rings[DESC_INDEX];
2882         napi_disable(&ring->napi);
2883         cancel_work_sync(&ring->dim.dim.work);
2884 }
2885
2886 static void bcmgenet_fini_rx_napi(struct bcmgenet_priv *priv)
2887 {
2888         unsigned int i;
2889         struct bcmgenet_rx_ring *ring;
2890
2891         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2892                 ring = &priv->rx_rings[i];
2893                 netif_napi_del(&ring->napi);
2894         }
2895
2896         ring = &priv->rx_rings[DESC_INDEX];
2897         netif_napi_del(&ring->napi);
2898 }
2899
2900 /* Initialize Rx queues
2901  *
2902  * Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
2903  * used to direct traffic to these queues.
2904  *
2905  * Queue 16 is the default Rx queue with GENET_Q16_RX_BD_CNT descriptors.
2906  */
2907 static int bcmgenet_init_rx_queues(struct net_device *dev)
2908 {
2909         struct bcmgenet_priv *priv = netdev_priv(dev);
2910         u32 i;
2911         u32 dma_enable;
2912         u32 dma_ctrl;
2913         u32 ring_cfg;
2914         int ret;
2915
2916         dma_ctrl = bcmgenet_rdma_readl(priv, DMA_CTRL);
2917         dma_enable = dma_ctrl & DMA_EN;
2918         dma_ctrl &= ~DMA_EN;
2919         bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2920
2921         dma_ctrl = 0;
2922         ring_cfg = 0;
2923
2924         /* Initialize Rx priority queues */
2925         for (i = 0; i < priv->hw_params->rx_queues; i++) {
2926                 ret = bcmgenet_init_rx_ring(priv, i,
2927                                             priv->hw_params->rx_bds_per_q,
2928                                             i * priv->hw_params->rx_bds_per_q,
2929                                             (i + 1) *
2930                                             priv->hw_params->rx_bds_per_q);
2931                 if (ret)
2932                         return ret;
2933
2934                 ring_cfg |= (1 << i);
2935                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2936         }
2937
2938         /* Initialize Rx default queue 16 */
2939         ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, GENET_Q16_RX_BD_CNT,
2940                                     priv->hw_params->rx_queues *
2941                                     priv->hw_params->rx_bds_per_q,
2942                                     TOTAL_DESC);
2943         if (ret)
2944                 return ret;
2945
2946         ring_cfg |= (1 << DESC_INDEX);
2947         dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2948
2949         /* Enable rings */
2950         bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
2951
2952         /* Configure ring as descriptor ring and re-enable DMA if enabled */
2953         if (dma_enable)
2954                 dma_ctrl |= DMA_EN;
2955         bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2956
2957         return 0;
2958 }
2959
2960 static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
2961 {
2962         int ret = 0;
2963         int timeout = 0;
2964         u32 reg;
2965         u32 dma_ctrl;
2966         int i;
2967
2968         /* Disable TDMA to stop add more frames in TX DMA */
2969         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2970         reg &= ~DMA_EN;
2971         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2972
2973         /* Check TDMA status register to confirm TDMA is disabled */
2974         while (timeout++ < DMA_TIMEOUT_VAL) {
2975                 reg = bcmgenet_tdma_readl(priv, DMA_STATUS);
2976                 if (reg & DMA_DISABLED)
2977                         break;
2978
2979                 udelay(1);
2980         }
2981
2982         if (timeout == DMA_TIMEOUT_VAL) {
2983                 netdev_warn(priv->dev, "Timed out while disabling TX DMA\n");
2984                 ret = -ETIMEDOUT;
2985         }
2986
2987         /* Wait 10ms for packet drain in both tx and rx dma */
2988         usleep_range(10000, 20000);
2989
2990         /* Disable RDMA */
2991         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2992         reg &= ~DMA_EN;
2993         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2994
2995         timeout = 0;
2996         /* Check RDMA status register to confirm RDMA is disabled */
2997         while (timeout++ < DMA_TIMEOUT_VAL) {
2998                 reg = bcmgenet_rdma_readl(priv, DMA_STATUS);
2999                 if (reg & DMA_DISABLED)
3000                         break;
3001
3002                 udelay(1);
3003         }
3004
3005         if (timeout == DMA_TIMEOUT_VAL) {
3006                 netdev_warn(priv->dev, "Timed out while disabling RX DMA\n");
3007                 ret = -ETIMEDOUT;
3008         }
3009
3010         dma_ctrl = 0;
3011         for (i = 0; i < priv->hw_params->rx_queues; i++)
3012                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3013         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3014         reg &= ~dma_ctrl;
3015         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3016
3017         dma_ctrl = 0;
3018         for (i = 0; i < priv->hw_params->tx_queues; i++)
3019                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3020         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3021         reg &= ~dma_ctrl;
3022         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3023
3024         return ret;
3025 }
3026
3027 static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
3028 {
3029         struct netdev_queue *txq;
3030         int i;
3031
3032         bcmgenet_fini_rx_napi(priv);
3033         bcmgenet_fini_tx_napi(priv);
3034
3035         for (i = 0; i < priv->num_tx_bds; i++)
3036                 dev_kfree_skb(bcmgenet_free_tx_cb(&priv->pdev->dev,
3037                                                   priv->tx_cbs + i));
3038
3039         for (i = 0; i < priv->hw_params->tx_queues; i++) {
3040                 txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[i].queue);
3041                 netdev_tx_reset_queue(txq);
3042         }
3043
3044         txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[DESC_INDEX].queue);
3045         netdev_tx_reset_queue(txq);
3046
3047         bcmgenet_free_rx_buffers(priv);
3048         kfree(priv->rx_cbs);
3049         kfree(priv->tx_cbs);
3050 }
3051
3052 /* init_edma: Initialize DMA control register */
3053 static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
3054 {
3055         int ret;
3056         unsigned int i;
3057         struct enet_cb *cb;
3058
3059         netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
3060
3061         /* Initialize common Rx ring structures */
3062         priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
3063         priv->num_rx_bds = TOTAL_DESC;
3064         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
3065                                GFP_KERNEL);
3066         if (!priv->rx_cbs)
3067                 return -ENOMEM;
3068
3069         for (i = 0; i < priv->num_rx_bds; i++) {
3070                 cb = priv->rx_cbs + i;
3071                 cb->bd_addr = priv->rx_bds + i * DMA_DESC_SIZE;
3072         }
3073
3074         /* Initialize common TX ring structures */
3075         priv->tx_bds = priv->base + priv->hw_params->tdma_offset;
3076         priv->num_tx_bds = TOTAL_DESC;
3077         priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb),
3078                                GFP_KERNEL);
3079         if (!priv->tx_cbs) {
3080                 kfree(priv->rx_cbs);
3081                 return -ENOMEM;
3082         }
3083
3084         for (i = 0; i < priv->num_tx_bds; i++) {
3085                 cb = priv->tx_cbs + i;
3086                 cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;
3087         }
3088
3089         /* Init rDma */
3090         bcmgenet_rdma_writel(priv, priv->dma_max_burst_length,
3091                              DMA_SCB_BURST_SIZE);
3092
3093         /* Initialize Rx queues */
3094         ret = bcmgenet_init_rx_queues(priv->dev);
3095         if (ret) {
3096                 netdev_err(priv->dev, "failed to initialize Rx queues\n");
3097                 bcmgenet_free_rx_buffers(priv);
3098                 kfree(priv->rx_cbs);
3099                 kfree(priv->tx_cbs);
3100                 return ret;
3101         }
3102
3103         /* Init tDma */
3104         bcmgenet_tdma_writel(priv, priv->dma_max_burst_length,
3105                              DMA_SCB_BURST_SIZE);
3106
3107         /* Initialize Tx queues */
3108         bcmgenet_init_tx_queues(priv->dev);
3109
3110         return 0;
3111 }
3112
3113 /* Interrupt bottom half */
3114 static void bcmgenet_irq_task(struct work_struct *work)
3115 {
3116         unsigned int status;
3117         struct bcmgenet_priv *priv = container_of(
3118                         work, struct bcmgenet_priv, bcmgenet_irq_work);
3119
3120         netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
3121
3122         spin_lock_irq(&priv->lock);
3123         status = priv->irq0_stat;
3124         priv->irq0_stat = 0;
3125         spin_unlock_irq(&priv->lock);
3126
3127         if (status & UMAC_IRQ_PHY_DET_R &&
3128             priv->dev->phydev->autoneg != AUTONEG_ENABLE) {
3129                 phy_init_hw(priv->dev->phydev);
3130                 genphy_config_aneg(priv->dev->phydev);
3131         }
3132
3133         /* Link UP/DOWN event */
3134         if (status & UMAC_IRQ_LINK_EVENT)
3135                 phy_mac_interrupt(priv->dev->phydev);
3136
3137 }
3138
3139 /* bcmgenet_isr1: handle Rx and Tx priority queues */
3140 static irqreturn_t bcmgenet_isr1(int irq, void *dev_id)
3141 {
3142         struct bcmgenet_priv *priv = dev_id;
3143         struct bcmgenet_rx_ring *rx_ring;
3144         struct bcmgenet_tx_ring *tx_ring;
3145         unsigned int index, status;
3146
3147         /* Read irq status */
3148         status = bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
3149                 ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
3150
3151         /* clear interrupts */
3152         bcmgenet_intrl2_1_writel(priv, status, INTRL2_CPU_CLEAR);
3153
3154         netif_dbg(priv, intr, priv->dev,
3155                   "%s: IRQ=0x%x\n", __func__, status);
3156
3157         /* Check Rx priority queue interrupts */
3158         for (index = 0; index < priv->hw_params->rx_queues; index++) {
3159                 if (!(status & BIT(UMAC_IRQ1_RX_INTR_SHIFT + index)))
3160                         continue;
3161
3162                 rx_ring = &priv->rx_rings[index];
3163                 rx_ring->dim.event_ctr++;
3164
3165                 if (likely(napi_schedule_prep(&rx_ring->napi))) {
3166                         rx_ring->int_disable(rx_ring);
3167                         __napi_schedule_irqoff(&rx_ring->napi);
3168                 }
3169         }
3170
3171         /* Check Tx priority queue interrupts */
3172         for (index = 0; index < priv->hw_params->tx_queues; index++) {
3173                 if (!(status & BIT(index)))
3174                         continue;
3175
3176                 tx_ring = &priv->tx_rings[index];
3177
3178                 if (likely(napi_schedule_prep(&tx_ring->napi))) {
3179                         tx_ring->int_disable(tx_ring);
3180                         __napi_schedule_irqoff(&tx_ring->napi);
3181                 }
3182         }
3183
3184         return IRQ_HANDLED;
3185 }
3186
3187 /* bcmgenet_isr0: handle Rx and Tx default queues + other stuff */
3188 static irqreturn_t bcmgenet_isr0(int irq, void *dev_id)
3189 {
3190         struct bcmgenet_priv *priv = dev_id;
3191         struct bcmgenet_rx_ring *rx_ring;
3192         struct bcmgenet_tx_ring *tx_ring;
3193         unsigned int status;
3194         unsigned long flags;
3195
3196         /* Read irq status */
3197         status = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) &
3198                 ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
3199
3200         /* clear interrupts */
3201         bcmgenet_intrl2_0_writel(priv, status, INTRL2_CPU_CLEAR);
3202
3203         netif_dbg(priv, intr, priv->dev,
3204                   "IRQ=0x%x\n", status);
3205
3206         if (status & UMAC_IRQ_RXDMA_DONE) {
3207                 rx_ring = &priv->rx_rings[DESC_INDEX];
3208                 rx_ring->dim.event_ctr++;
3209
3210                 if (likely(napi_schedule_prep(&rx_ring->napi))) {
3211                         rx_ring->int_disable(rx_ring);
3212                         __napi_schedule_irqoff(&rx_ring->napi);
3213                 }
3214         }
3215
3216         if (status & UMAC_IRQ_TXDMA_DONE) {
3217                 tx_ring = &priv->tx_rings[DESC_INDEX];
3218
3219                 if (likely(napi_schedule_prep(&tx_ring->napi))) {
3220                         tx_ring->int_disable(tx_ring);
3221                         __napi_schedule_irqoff(&tx_ring->napi);
3222                 }
3223         }
3224
3225         if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
3226                 status & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) {
3227                 wake_up(&priv->wq);
3228         }
3229
3230         /* all other interested interrupts handled in bottom half */
3231         status &= (UMAC_IRQ_LINK_EVENT | UMAC_IRQ_PHY_DET_R);
3232         if (status) {
3233                 /* Save irq status for bottom-half processing. */
3234                 spin_lock_irqsave(&priv->lock, flags);
3235                 priv->irq0_stat |= status;
3236                 spin_unlock_irqrestore(&priv->lock, flags);
3237
3238                 schedule_work(&priv->bcmgenet_irq_work);
3239         }
3240
3241         return IRQ_HANDLED;
3242 }
3243
3244 static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id)
3245 {
3246         /* Acknowledge the interrupt */
3247         return IRQ_HANDLED;
3248 }
3249
3250 static void bcmgenet_umac_reset(struct bcmgenet_priv *priv)
3251 {
3252         u32 reg;
3253
3254         reg = bcmgenet_rbuf_ctrl_get(priv);
3255         reg |= BIT(1);
3256         bcmgenet_rbuf_ctrl_set(priv, reg);
3257         udelay(10);
3258
3259         reg &= ~BIT(1);
3260         bcmgenet_rbuf_ctrl_set(priv, reg);
3261         udelay(10);
3262 }
3263
3264 static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv,
3265                                  const unsigned char *addr)
3266 {
3267         bcmgenet_umac_writel(priv, get_unaligned_be32(&addr[0]), UMAC_MAC0);
3268         bcmgenet_umac_writel(priv, get_unaligned_be16(&addr[4]), UMAC_MAC1);
3269 }
3270
3271 static void bcmgenet_get_hw_addr(struct bcmgenet_priv *priv,
3272                                  unsigned char *addr)
3273 {
3274         u32 addr_tmp;
3275
3276         addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC0);
3277         put_unaligned_be32(addr_tmp, &addr[0]);
3278         addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC1);
3279         put_unaligned_be16(addr_tmp, &addr[4]);
3280 }
3281
3282 /* Returns a reusable dma control register value */
3283 static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
3284 {
3285         unsigned int i;
3286         u32 reg;
3287         u32 dma_ctrl;
3288
3289         /* disable DMA */
3290         dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
3291         for (i = 0; i < priv->hw_params->tx_queues; i++)
3292                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3293         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3294         reg &= ~dma_ctrl;
3295         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3296
3297         dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
3298         for (i = 0; i < priv->hw_params->rx_queues; i++)
3299                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3300         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3301         reg &= ~dma_ctrl;
3302         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3303
3304         bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH);
3305         udelay(10);
3306         bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
3307
3308         return dma_ctrl;
3309 }
3310
3311 static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
3312 {
3313         u32 reg;
3314
3315         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3316         reg |= dma_ctrl;
3317         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3318
3319         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3320         reg |= dma_ctrl;
3321         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3322 }
3323
3324 static void bcmgenet_netif_start(struct net_device *dev)
3325 {
3326         struct bcmgenet_priv *priv = netdev_priv(dev);
3327
3328         /* Start the network engine */
3329         bcmgenet_set_rx_mode(dev);
3330         bcmgenet_enable_rx_napi(priv);
3331
3332         umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
3333
3334         bcmgenet_enable_tx_napi(priv);
3335
3336         /* Monitor link interrupts now */
3337         bcmgenet_link_intr_enable(priv);
3338
3339         phy_start(dev->phydev);
3340 }
3341
3342 static int bcmgenet_open(struct net_device *dev)
3343 {
3344         struct bcmgenet_priv *priv = netdev_priv(dev);
3345         unsigned long dma_ctrl;
3346         int ret;
3347
3348         netif_dbg(priv, ifup, dev, "bcmgenet_open\n");
3349
3350         /* Turn on the clock */
3351         clk_prepare_enable(priv->clk);
3352
3353         /* If this is an internal GPHY, power it back on now, before UniMAC is
3354          * brought out of reset as absolutely no UniMAC activity is allowed
3355          */
3356         if (priv->internal_phy)
3357                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
3358
3359         /* take MAC out of reset */
3360         bcmgenet_umac_reset(priv);
3361
3362         init_umac(priv);
3363
3364         /* Apply features again in case we changed them while interface was
3365          * down
3366          */
3367         bcmgenet_set_features(dev, dev->features);
3368
3369         bcmgenet_set_hw_addr(priv, dev->dev_addr);
3370
3371         /* Disable RX/TX DMA and flush TX queues */
3372         dma_ctrl = bcmgenet_dma_disable(priv);
3373
3374         /* Reinitialize TDMA and RDMA and SW housekeeping */
3375         ret = bcmgenet_init_dma(priv);
3376         if (ret) {
3377                 netdev_err(dev, "failed to initialize DMA\n");
3378                 goto err_clk_disable;
3379         }
3380
3381         /* Always enable ring 16 - descriptor ring */
3382         bcmgenet_enable_dma(priv, dma_ctrl);
3383
3384         /* HFB init */
3385         bcmgenet_hfb_init(priv);
3386
3387         ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED,
3388                           dev->name, priv);
3389         if (ret < 0) {
3390                 netdev_err(dev, "can't request IRQ %d\n", priv->irq0);
3391                 goto err_fini_dma;
3392         }
3393
3394         ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED,
3395                           dev->name, priv);
3396         if (ret < 0) {
3397                 netdev_err(dev, "can't request IRQ %d\n", priv->irq1);
3398                 goto err_irq0;
3399         }
3400
3401         ret = bcmgenet_mii_probe(dev);
3402         if (ret) {
3403                 netdev_err(dev, "failed to connect to PHY\n");
3404                 goto err_irq1;
3405         }
3406
3407         bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
3408
3409         bcmgenet_netif_start(dev);
3410
3411         netif_tx_start_all_queues(dev);
3412
3413         return 0;
3414
3415 err_irq1:
3416         free_irq(priv->irq1, priv);
3417 err_irq0:
3418         free_irq(priv->irq0, priv);
3419 err_fini_dma:
3420         bcmgenet_dma_teardown(priv);
3421         bcmgenet_fini_dma(priv);
3422 err_clk_disable:
3423         if (priv->internal_phy)
3424                 bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
3425         clk_disable_unprepare(priv->clk);
3426         return ret;
3427 }
3428
3429 static void bcmgenet_netif_stop(struct net_device *dev, bool stop_phy)
3430 {
3431         struct bcmgenet_priv *priv = netdev_priv(dev);
3432
3433         bcmgenet_disable_tx_napi(priv);
3434         netif_tx_disable(dev);
3435
3436         /* Disable MAC receive */
3437         umac_enable_set(priv, CMD_RX_EN, false);
3438
3439         bcmgenet_dma_teardown(priv);
3440
3441         /* Disable MAC transmit. TX DMA disabled must be done before this */
3442         umac_enable_set(priv, CMD_TX_EN, false);
3443
3444         if (stop_phy)
3445                 phy_stop(dev->phydev);
3446         bcmgenet_disable_rx_napi(priv);
3447         bcmgenet_intr_disable(priv);
3448
3449         /* Wait for pending work items to complete. Since interrupts are
3450          * disabled no new work will be scheduled.
3451          */
3452         cancel_work_sync(&priv->bcmgenet_irq_work);
3453
3454         /* tx reclaim */
3455         bcmgenet_tx_reclaim_all(dev);
3456         bcmgenet_fini_dma(priv);
3457 }
3458
3459 static int bcmgenet_close(struct net_device *dev)
3460 {
3461         struct bcmgenet_priv *priv = netdev_priv(dev);
3462         int ret = 0;
3463
3464         netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
3465
3466         bcmgenet_netif_stop(dev, false);
3467
3468         /* Really kill the PHY state machine and disconnect from it */
3469         phy_disconnect(dev->phydev);
3470
3471         free_irq(priv->irq0, priv);
3472         free_irq(priv->irq1, priv);
3473
3474         if (priv->internal_phy)
3475                 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
3476
3477         clk_disable_unprepare(priv->clk);
3478
3479         return ret;
3480 }
3481
3482 static void bcmgenet_dump_tx_queue(struct bcmgenet_tx_ring *ring)
3483 {
3484         struct bcmgenet_priv *priv = ring->priv;
3485         u32 p_index, c_index, intsts, intmsk;
3486         struct netdev_queue *txq;
3487         unsigned int free_bds;
3488         bool txq_stopped;
3489
3490         if (!netif_msg_tx_err(priv))
3491                 return;
3492
3493         txq = netdev_get_tx_queue(priv->dev, ring->queue);
3494
3495         spin_lock(&ring->lock);
3496         if (ring->index == DESC_INDEX) {
3497                 intsts = ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
3498                 intmsk = UMAC_IRQ_TXDMA_DONE | UMAC_IRQ_TXDMA_MBDONE;
3499         } else {
3500                 intsts = ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
3501                 intmsk = 1 << ring->index;
3502         }
3503         c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
3504         p_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_PROD_INDEX);
3505         txq_stopped = netif_tx_queue_stopped(txq);
3506         free_bds = ring->free_bds;
3507         spin_unlock(&ring->lock);
3508
3509         netif_err(priv, tx_err, priv->dev, "Ring %d queue %d status summary\n"
3510                   "TX queue status: %s, interrupts: %s\n"
3511                   "(sw)free_bds: %d (sw)size: %d\n"
3512                   "(sw)p_index: %d (hw)p_index: %d\n"
3513                   "(sw)c_index: %d (hw)c_index: %d\n"
3514                   "(sw)clean_p: %d (sw)write_p: %d\n"
3515                   "(sw)cb_ptr: %d (sw)end_ptr: %d\n",
3516                   ring->index, ring->queue,
3517                   txq_stopped ? "stopped" : "active",
3518                   intsts & intmsk ? "enabled" : "disabled",
3519                   free_bds, ring->size,
3520                   ring->prod_index, p_index & DMA_P_INDEX_MASK,
3521                   ring->c_index, c_index & DMA_C_INDEX_MASK,
3522                   ring->clean_ptr, ring->write_ptr,
3523                   ring->cb_ptr, ring->end_ptr);
3524 }
3525
3526 static void bcmgenet_timeout(struct net_device *dev, unsigned int txqueue)
3527 {
3528         struct bcmgenet_priv *priv = netdev_priv(dev);
3529         u32 int0_enable = 0;
3530         u32 int1_enable = 0;
3531         unsigned int q;
3532
3533         netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
3534
3535         for (q = 0; q < priv->hw_params->tx_queues; q++)
3536                 bcmgenet_dump_tx_queue(&priv->tx_rings[q]);
3537         bcmgenet_dump_tx_queue(&priv->tx_rings[DESC_INDEX]);
3538
3539         bcmgenet_tx_reclaim_all(dev);
3540
3541         for (q = 0; q < priv->hw_params->tx_queues; q++)
3542                 int1_enable |= (1 << q);
3543
3544         int0_enable = UMAC_IRQ_TXDMA_DONE;
3545
3546         /* Re-enable TX interrupts if disabled */
3547         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
3548         bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
3549
3550         netif_trans_update(dev);
3551
3552         dev->stats.tx_errors++;
3553
3554         netif_tx_wake_all_queues(dev);
3555 }
3556
3557 #define MAX_MDF_FILTER  17
3558
3559 static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv,
3560                                          const unsigned char *addr,
3561                                          int *i)
3562 {
3563         bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1],
3564                              UMAC_MDF_ADDR + (*i * 4));
3565         bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 |
3566                              addr[4] << 8 | addr[5],
3567                              UMAC_MDF_ADDR + ((*i + 1) * 4));
3568         *i += 2;
3569 }
3570
3571 static void bcmgenet_set_rx_mode(struct net_device *dev)
3572 {
3573         struct bcmgenet_priv *priv = netdev_priv(dev);
3574         struct netdev_hw_addr *ha;
3575         int i, nfilter;
3576         u32 reg;
3577
3578         netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags);
3579
3580         /* Number of filters needed */
3581         nfilter = netdev_uc_count(dev) + netdev_mc_count(dev) + 2;
3582
3583         /*
3584          * Turn on promicuous mode for three scenarios
3585          * 1. IFF_PROMISC flag is set
3586          * 2. IFF_ALLMULTI flag is set
3587          * 3. The number of filters needed exceeds the number filters
3588          *    supported by the hardware.
3589         */
3590         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
3591         if ((dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) ||
3592             (nfilter > MAX_MDF_FILTER)) {
3593                 reg |= CMD_PROMISC;
3594                 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3595                 bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL);
3596                 return;
3597         } else {
3598                 reg &= ~CMD_PROMISC;
3599                 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3600         }
3601
3602         /* update MDF filter */
3603         i = 0;
3604         /* Broadcast */
3605         bcmgenet_set_mdf_addr(priv, dev->broadcast, &i);
3606         /* my own address.*/
3607         bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i);
3608
3609         /* Unicast */
3610         netdev_for_each_uc_addr(ha, dev)
3611                 bcmgenet_set_mdf_addr(priv, ha->addr, &i);
3612
3613         /* Multicast */
3614         netdev_for_each_mc_addr(ha, dev)
3615                 bcmgenet_set_mdf_addr(priv, ha->addr, &i);
3616
3617         /* Enable filters */
3618         reg = GENMASK(MAX_MDF_FILTER - 1, MAX_MDF_FILTER - nfilter);
3619         bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL);
3620 }
3621
3622 /* Set the hardware MAC address. */
3623 static int bcmgenet_set_mac_addr(struct net_device *dev, void *p)
3624 {
3625         struct sockaddr *addr = p;
3626
3627         /* Setting the MAC address at the hardware level is not possible
3628          * without disabling the UniMAC RX/TX enable bits.
3629          */
3630         if (netif_running(dev))
3631                 return -EBUSY;
3632
3633         eth_hw_addr_set(dev, addr->sa_data);
3634
3635         return 0;
3636 }
3637
3638 static struct net_device_stats *bcmgenet_get_stats(struct net_device *dev)
3639 {
3640         struct bcmgenet_priv *priv = netdev_priv(dev);
3641         unsigned long tx_bytes = 0, tx_packets = 0;
3642         unsigned long rx_bytes = 0, rx_packets = 0;
3643         unsigned long rx_errors = 0, rx_dropped = 0;
3644         struct bcmgenet_tx_ring *tx_ring;
3645         struct bcmgenet_rx_ring *rx_ring;
3646         unsigned int q;
3647
3648         for (q = 0; q < priv->hw_params->tx_queues; q++) {
3649                 tx_ring = &priv->tx_rings[q];
3650                 tx_bytes += tx_ring->bytes;
3651                 tx_packets += tx_ring->packets;
3652         }
3653         tx_ring = &priv->tx_rings[DESC_INDEX];
3654         tx_bytes += tx_ring->bytes;
3655         tx_packets += tx_ring->packets;
3656
3657         for (q = 0; q < priv->hw_params->rx_queues; q++) {
3658                 rx_ring = &priv->rx_rings[q];
3659
3660                 rx_bytes += rx_ring->bytes;
3661                 rx_packets += rx_ring->packets;
3662                 rx_errors += rx_ring->errors;
3663                 rx_dropped += rx_ring->dropped;
3664         }
3665         rx_ring = &priv->rx_rings[DESC_INDEX];
3666         rx_bytes += rx_ring->bytes;
3667         rx_packets += rx_ring->packets;
3668         rx_errors += rx_ring->errors;
3669         rx_dropped += rx_ring->dropped;
3670
3671         dev->stats.tx_bytes = tx_bytes;
3672         dev->stats.tx_packets = tx_packets;
3673         dev->stats.rx_bytes = rx_bytes;
3674         dev->stats.rx_packets = rx_packets;
3675         dev->stats.rx_errors = rx_errors;
3676         dev->stats.rx_missed_errors = rx_errors;
3677         dev->stats.rx_dropped = rx_dropped;
3678         return &dev->stats;
3679 }
3680
3681 static int bcmgenet_change_carrier(struct net_device *dev, bool new_carrier)
3682 {
3683         struct bcmgenet_priv *priv = netdev_priv(dev);
3684
3685         if (!dev->phydev || !phy_is_pseudo_fixed_link(dev->phydev) ||
3686             priv->phy_interface != PHY_INTERFACE_MODE_MOCA)
3687                 return -EOPNOTSUPP;
3688
3689         if (new_carrier)
3690                 netif_carrier_on(dev);
3691         else
3692                 netif_carrier_off(dev);
3693
3694         return 0;
3695 }
3696
3697 static const struct net_device_ops bcmgenet_netdev_ops = {
3698         .ndo_open               = bcmgenet_open,
3699         .ndo_stop               = bcmgenet_close,
3700         .ndo_start_xmit         = bcmgenet_xmit,
3701         .ndo_tx_timeout         = bcmgenet_timeout,
3702         .ndo_set_rx_mode        = bcmgenet_set_rx_mode,
3703         .ndo_set_mac_address    = bcmgenet_set_mac_addr,
3704         .ndo_eth_ioctl          = phy_do_ioctl_running,
3705         .ndo_set_features       = bcmgenet_set_features,
3706         .ndo_get_stats          = bcmgenet_get_stats,
3707         .ndo_change_carrier     = bcmgenet_change_carrier,
3708 };
3709
3710 /* Array of GENET hardware parameters/characteristics */
3711 static struct bcmgenet_hw_params bcmgenet_hw_params[] = {
3712         [GENET_V1] = {
3713                 .tx_queues = 0,
3714                 .tx_bds_per_q = 0,
3715                 .rx_queues = 0,
3716                 .rx_bds_per_q = 0,
3717                 .bp_in_en_shift = 16,
3718                 .bp_in_mask = 0xffff,
3719                 .hfb_filter_cnt = 16,
3720                 .qtag_mask = 0x1F,
3721                 .hfb_offset = 0x1000,
3722                 .rdma_offset = 0x2000,
3723                 .tdma_offset = 0x3000,
3724                 .words_per_bd = 2,
3725         },
3726         [GENET_V2] = {
3727                 .tx_queues = 4,
3728                 .tx_bds_per_q = 32,
3729                 .rx_queues = 0,
3730                 .rx_bds_per_q = 0,
3731                 .bp_in_en_shift = 16,
3732                 .bp_in_mask = 0xffff,
3733                 .hfb_filter_cnt = 16,
3734                 .qtag_mask = 0x1F,
3735                 .tbuf_offset = 0x0600,
3736                 .hfb_offset = 0x1000,
3737                 .hfb_reg_offset = 0x2000,
3738                 .rdma_offset = 0x3000,
3739                 .tdma_offset = 0x4000,
3740                 .words_per_bd = 2,
3741                 .flags = GENET_HAS_EXT,
3742         },
3743         [GENET_V3] = {
3744                 .tx_queues = 4,
3745                 .tx_bds_per_q = 32,
3746                 .rx_queues = 0,
3747                 .rx_bds_per_q = 0,
3748                 .bp_in_en_shift = 17,
3749                 .bp_in_mask = 0x1ffff,
3750                 .hfb_filter_cnt = 48,
3751                 .hfb_filter_size = 128,
3752                 .qtag_mask = 0x3F,
3753                 .tbuf_offset = 0x0600,
3754                 .hfb_offset = 0x8000,
3755                 .hfb_reg_offset = 0xfc00,
3756                 .rdma_offset = 0x10000,
3757                 .tdma_offset = 0x11000,
3758                 .words_per_bd = 2,
3759                 .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR |
3760                          GENET_HAS_MOCA_LINK_DET,
3761         },
3762         [GENET_V4] = {
3763                 .tx_queues = 4,
3764                 .tx_bds_per_q = 32,
3765                 .rx_queues = 0,
3766                 .rx_bds_per_q = 0,
3767                 .bp_in_en_shift = 17,
3768                 .bp_in_mask = 0x1ffff,
3769                 .hfb_filter_cnt = 48,
3770                 .hfb_filter_size = 128,
3771                 .qtag_mask = 0x3F,
3772                 .tbuf_offset = 0x0600,
3773                 .hfb_offset = 0x8000,
3774                 .hfb_reg_offset = 0xfc00,
3775                 .rdma_offset = 0x2000,
3776                 .tdma_offset = 0x4000,
3777                 .words_per_bd = 3,
3778                 .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
3779                          GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
3780         },
3781         [GENET_V5] = {
3782                 .tx_queues = 4,
3783                 .tx_bds_per_q = 32,
3784                 .rx_queues = 0,
3785                 .rx_bds_per_q = 0,
3786                 .bp_in_en_shift = 17,
3787                 .bp_in_mask = 0x1ffff,
3788                 .hfb_filter_cnt = 48,
3789                 .hfb_filter_size = 128,
3790                 .qtag_mask = 0x3F,
3791                 .tbuf_offset = 0x0600,
3792                 .hfb_offset = 0x8000,
3793                 .hfb_reg_offset = 0xfc00,
3794                 .rdma_offset = 0x2000,
3795                 .tdma_offset = 0x4000,
3796                 .words_per_bd = 3,
3797                 .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
3798                          GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
3799         },
3800 };
3801
3802 /* Infer hardware parameters from the detected GENET version */
3803 static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
3804 {
3805         struct bcmgenet_hw_params *params;
3806         u32 reg;
3807         u8 major;
3808         u16 gphy_rev;
3809
3810         if (GENET_IS_V5(priv) || GENET_IS_V4(priv)) {
3811                 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3812                 genet_dma_ring_regs = genet_dma_ring_regs_v4;
3813         } else if (GENET_IS_V3(priv)) {
3814                 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3815                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3816         } else if (GENET_IS_V2(priv)) {
3817                 bcmgenet_dma_regs = bcmgenet_dma_regs_v2;
3818                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3819         } else if (GENET_IS_V1(priv)) {
3820                 bcmgenet_dma_regs = bcmgenet_dma_regs_v1;
3821                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3822         }
3823
3824         /* enum genet_version starts at 1 */
3825         priv->hw_params = &bcmgenet_hw_params[priv->version];
3826         params = priv->hw_params;
3827
3828         /* Read GENET HW version */
3829         reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL);
3830         major = (reg >> 24 & 0x0f);
3831         if (major == 6)
3832                 major = 5;
3833         else if (major == 5)
3834                 major = 4;
3835         else if (major == 0)
3836                 major = 1;
3837         if (major != priv->version) {
3838                 dev_err(&priv->pdev->dev,
3839                         "GENET version mismatch, got: %d, configured for: %d\n",
3840                         major, priv->version);
3841         }
3842
3843         /* Print the GENET core version */
3844         dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT,
3845                  major, (reg >> 16) & 0x0f, reg & 0xffff);
3846
3847         /* Store the integrated PHY revision for the MDIO probing function
3848          * to pass this information to the PHY driver. The PHY driver expects
3849          * to find the PHY major revision in bits 15:8 while the GENET register
3850          * stores that information in bits 7:0, account for that.
3851          *
3852          * On newer chips, starting with PHY revision G0, a new scheme is
3853          * deployed similar to the Starfighter 2 switch with GPHY major
3854          * revision in bits 15:8 and patch level in bits 7:0. Major revision 0
3855          * is reserved as well as special value 0x01ff, we have a small
3856          * heuristic to check for the new GPHY revision and re-arrange things
3857          * so the GPHY driver is happy.
3858          */
3859         gphy_rev = reg & 0xffff;
3860
3861         if (GENET_IS_V5(priv)) {
3862                 /* The EPHY revision should come from the MDIO registers of
3863                  * the PHY not from GENET.
3864                  */
3865                 if (gphy_rev != 0) {
3866                         pr_warn("GENET is reporting EPHY revision: 0x%04x\n",
3867                                 gphy_rev);
3868                 }
3869         /* This is reserved so should require special treatment */
3870         } else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
3871                 pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
3872                 return;
3873         /* This is the good old scheme, just GPHY major, no minor nor patch */
3874         } else if ((gphy_rev & 0xf0) != 0) {
3875                 priv->gphy_rev = gphy_rev << 8;
3876         /* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
3877         } else if ((gphy_rev & 0xff00) != 0) {
3878                 priv->gphy_rev = gphy_rev;
3879         }
3880
3881 #ifdef CONFIG_PHYS_ADDR_T_64BIT
3882         if (!(params->flags & GENET_HAS_40BITS))
3883                 pr_warn("GENET does not support 40-bits PA\n");
3884 #endif
3885
3886         pr_debug("Configuration for version: %d\n"
3887                 "TXq: %1d, TXqBDs: %1d, RXq: %1d, RXqBDs: %1d\n"
3888                 "BP << en: %2d, BP msk: 0x%05x\n"
3889                 "HFB count: %2d, QTAQ msk: 0x%05x\n"
3890                 "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n"
3891                 "RDMA: 0x%05x, TDMA: 0x%05x\n"
3892                 "Words/BD: %d\n",
3893                 priv->version,
3894                 params->tx_queues, params->tx_bds_per_q,
3895                 params->rx_queues, params->rx_bds_per_q,
3896                 params->bp_in_en_shift, params->bp_in_mask,
3897                 params->hfb_filter_cnt, params->qtag_mask,
3898                 params->tbuf_offset, params->hfb_offset,
3899                 params->hfb_reg_offset,
3900                 params->rdma_offset, params->tdma_offset,
3901                 params->words_per_bd);
3902 }
3903
3904 struct bcmgenet_plat_data {
3905         enum bcmgenet_version version;
3906         u32 dma_max_burst_length;
3907         bool ephy_16nm;
3908 };
3909
3910 static const struct bcmgenet_plat_data v1_plat_data = {
3911         .version = GENET_V1,
3912         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3913 };
3914
3915 static const struct bcmgenet_plat_data v2_plat_data = {
3916         .version = GENET_V2,
3917         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3918 };
3919
3920 static const struct bcmgenet_plat_data v3_plat_data = {
3921         .version = GENET_V3,
3922         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3923 };
3924
3925 static const struct bcmgenet_plat_data v4_plat_data = {
3926         .version = GENET_V4,
3927         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3928 };
3929
3930 static const struct bcmgenet_plat_data v5_plat_data = {
3931         .version = GENET_V5,
3932         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3933 };
3934
3935 static const struct bcmgenet_plat_data bcm2711_plat_data = {
3936         .version = GENET_V5,
3937         .dma_max_burst_length = 0x08,
3938 };
3939
3940 static const struct bcmgenet_plat_data bcm7712_plat_data = {
3941         .version = GENET_V5,
3942         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3943         .ephy_16nm = true,
3944 };
3945
3946 static const struct of_device_id bcmgenet_match[] = {
3947         { .compatible = "brcm,genet-v1", .data = &v1_plat_data },
3948         { .compatible = "brcm,genet-v2", .data = &v2_plat_data },
3949         { .compatible = "brcm,genet-v3", .data = &v3_plat_data },
3950         { .compatible = "brcm,genet-v4", .data = &v4_plat_data },
3951         { .compatible = "brcm,genet-v5", .data = &v5_plat_data },
3952         { .compatible = "brcm,bcm2711-genet-v5", .data = &bcm2711_plat_data },
3953         { .compatible = "brcm,bcm7712-genet-v5", .data = &bcm7712_plat_data },
3954         { },
3955 };
3956 MODULE_DEVICE_TABLE(of, bcmgenet_match);
3957
3958 static int bcmgenet_probe(struct platform_device *pdev)
3959 {
3960         struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
3961         const struct bcmgenet_plat_data *pdata;
3962         struct bcmgenet_priv *priv;
3963         struct net_device *dev;
3964         unsigned int i;
3965         int err = -EIO;
3966
3967         /* Up to GENET_MAX_MQ_CNT + 1 TX queues and RX queues */
3968         dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1,
3969                                  GENET_MAX_MQ_CNT + 1);
3970         if (!dev) {
3971                 dev_err(&pdev->dev, "can't allocate net device\n");
3972                 return -ENOMEM;
3973         }
3974
3975         priv = netdev_priv(dev);
3976         priv->irq0 = platform_get_irq(pdev, 0);
3977         if (priv->irq0 < 0) {
3978                 err = priv->irq0;
3979                 goto err;
3980         }
3981         priv->irq1 = platform_get_irq(pdev, 1);
3982         if (priv->irq1 < 0) {
3983                 err = priv->irq1;
3984                 goto err;
3985         }
3986         priv->wol_irq = platform_get_irq_optional(pdev, 2);
3987         if (priv->wol_irq == -EPROBE_DEFER) {
3988                 err = priv->wol_irq;
3989                 goto err;
3990         }
3991
3992         priv->base = devm_platform_ioremap_resource(pdev, 0);
3993         if (IS_ERR(priv->base)) {
3994                 err = PTR_ERR(priv->base);
3995                 goto err;
3996         }
3997
3998         spin_lock_init(&priv->lock);
3999
4000         /* Set default pause parameters */
4001         priv->autoneg_pause = 1;
4002         priv->tx_pause = 1;
4003         priv->rx_pause = 1;
4004
4005         SET_NETDEV_DEV(dev, &pdev->dev);
4006         dev_set_drvdata(&pdev->dev, dev);
4007         dev->watchdog_timeo = 2 * HZ;
4008         dev->ethtool_ops = &bcmgenet_ethtool_ops;
4009         dev->netdev_ops = &bcmgenet_netdev_ops;
4010
4011         priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);
4012
4013         /* Set default features */
4014         dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
4015                          NETIF_F_RXCSUM;
4016         dev->hw_features |= dev->features;
4017         dev->vlan_features |= dev->features;
4018
4019         /* Request the WOL interrupt and advertise suspend if available */
4020         priv->wol_irq_disabled = true;
4021         if (priv->wol_irq > 0) {
4022                 err = devm_request_irq(&pdev->dev, priv->wol_irq,
4023                                        bcmgenet_wol_isr, 0, dev->name, priv);
4024                 if (!err)
4025                         device_set_wakeup_capable(&pdev->dev, 1);
4026         }
4027
4028         /* Set the needed headroom to account for any possible
4029          * features enabling/disabling at runtime
4030          */
4031         dev->needed_headroom += 64;
4032
4033         priv->dev = dev;
4034         priv->pdev = pdev;
4035
4036         pdata = device_get_match_data(&pdev->dev);
4037         if (pdata) {
4038                 priv->version = pdata->version;
4039                 priv->dma_max_burst_length = pdata->dma_max_burst_length;
4040                 priv->ephy_16nm = pdata->ephy_16nm;
4041         } else {
4042                 priv->version = pd->genet_version;
4043                 priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH;
4044         }
4045
4046         priv->clk = devm_clk_get_optional(&priv->pdev->dev, "enet");
4047         if (IS_ERR(priv->clk)) {
4048                 dev_dbg(&priv->pdev->dev, "failed to get enet clock\n");
4049                 err = PTR_ERR(priv->clk);
4050                 goto err;
4051         }
4052
4053         err = clk_prepare_enable(priv->clk);
4054         if (err)
4055                 goto err;
4056
4057         bcmgenet_set_hw_params(priv);
4058
4059         err = -EIO;
4060         if (priv->hw_params->flags & GENET_HAS_40BITS)
4061                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
4062         if (err)
4063                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4064         if (err)
4065                 goto err_clk_disable;
4066
4067         /* Mii wait queue */
4068         init_waitqueue_head(&priv->wq);
4069         /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
4070         priv->rx_buf_len = RX_BUF_LENGTH;
4071         INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
4072
4073         priv->clk_wol = devm_clk_get_optional(&priv->pdev->dev, "enet-wol");
4074         if (IS_ERR(priv->clk_wol)) {
4075                 dev_dbg(&priv->pdev->dev, "failed to get enet-wol clock\n");
4076                 err = PTR_ERR(priv->clk_wol);
4077                 goto err_clk_disable;
4078         }
4079
4080         priv->clk_eee = devm_clk_get_optional(&priv->pdev->dev, "enet-eee");
4081         if (IS_ERR(priv->clk_eee)) {
4082                 dev_dbg(&priv->pdev->dev, "failed to get enet-eee clock\n");
4083                 err = PTR_ERR(priv->clk_eee);
4084                 goto err_clk_disable;
4085         }
4086
4087         /* If this is an internal GPHY, power it on now, before UniMAC is
4088          * brought out of reset as absolutely no UniMAC activity is allowed
4089          */
4090         if (device_get_phy_mode(&pdev->dev) == PHY_INTERFACE_MODE_INTERNAL)
4091                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
4092
4093         if (pd && !IS_ERR_OR_NULL(pd->mac_address))
4094                 eth_hw_addr_set(dev, pd->mac_address);
4095         else
4096                 if (device_get_ethdev_address(&pdev->dev, dev))
4097                         if (has_acpi_companion(&pdev->dev)) {
4098                                 u8 addr[ETH_ALEN];
4099
4100                                 bcmgenet_get_hw_addr(priv, addr);
4101                                 eth_hw_addr_set(dev, addr);
4102                         }
4103
4104         if (!is_valid_ether_addr(dev->dev_addr)) {
4105                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
4106                 eth_hw_addr_random(dev);
4107         }
4108
4109         reset_umac(priv);
4110
4111         err = bcmgenet_mii_init(dev);
4112         if (err)
4113                 goto err_clk_disable;
4114
4115         /* setup number of real queues  + 1 (GENET_V1 has 0 hardware queues
4116          * just the ring 16 descriptor based TX
4117          */
4118         netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1);
4119         netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1);
4120
4121         /* Set default coalescing parameters */
4122         for (i = 0; i < priv->hw_params->rx_queues; i++)
4123                 priv->rx_rings[i].rx_max_coalesced_frames = 1;
4124         priv->rx_rings[DESC_INDEX].rx_max_coalesced_frames = 1;
4125
4126         /* libphy will determine the link state */
4127         netif_carrier_off(dev);
4128
4129         /* Turn off the main clock, WOL clock is handled separately */
4130         clk_disable_unprepare(priv->clk);
4131
4132         err = register_netdev(dev);
4133         if (err) {
4134                 bcmgenet_mii_exit(dev);
4135                 goto err;
4136         }
4137
4138         return err;
4139
4140 err_clk_disable:
4141         clk_disable_unprepare(priv->clk);
4142 err:
4143         free_netdev(dev);
4144         return err;
4145 }
4146
4147 static void bcmgenet_remove(struct platform_device *pdev)
4148 {
4149         struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev);
4150
4151         dev_set_drvdata(&pdev->dev, NULL);
4152         unregister_netdev(priv->dev);
4153         bcmgenet_mii_exit(priv->dev);
4154         free_netdev(priv->dev);
4155 }
4156
4157 static void bcmgenet_shutdown(struct platform_device *pdev)
4158 {
4159         bcmgenet_remove(pdev);
4160 }
4161
4162 #ifdef CONFIG_PM_SLEEP
4163 static int bcmgenet_resume_noirq(struct device *d)
4164 {
4165         struct net_device *dev = dev_get_drvdata(d);
4166         struct bcmgenet_priv *priv = netdev_priv(dev);
4167         int ret;
4168         u32 reg;
4169
4170         if (!netif_running(dev))
4171                 return 0;
4172
4173         /* Turn on the clock */
4174         ret = clk_prepare_enable(priv->clk);
4175         if (ret)
4176                 return ret;
4177
4178         if (device_may_wakeup(d) && priv->wolopts) {
4179                 /* Account for Wake-on-LAN events and clear those events
4180                  * (Some devices need more time between enabling the clocks
4181                  *  and the interrupt register reflecting the wake event so
4182                  *  read the register twice)
4183                  */
4184                 reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
4185                 reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
4186                 if (reg & UMAC_IRQ_WAKE_EVENT)
4187                         pm_wakeup_event(&priv->pdev->dev, 0);
4188         }
4189
4190         bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_WAKE_EVENT, INTRL2_CPU_CLEAR);
4191
4192         return 0;
4193 }
4194
4195 static int bcmgenet_resume(struct device *d)
4196 {
4197         struct net_device *dev = dev_get_drvdata(d);
4198         struct bcmgenet_priv *priv = netdev_priv(dev);
4199         struct bcmgenet_rxnfc_rule *rule;
4200         unsigned long dma_ctrl;
4201         int ret;
4202
4203         if (!netif_running(dev))
4204                 return 0;
4205
4206         /* From WOL-enabled suspend, switch to regular clock */
4207         if (device_may_wakeup(d) && priv->wolopts)
4208                 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
4209
4210         /* If this is an internal GPHY, power it back on now, before UniMAC is
4211          * brought out of reset as absolutely no UniMAC activity is allowed
4212          */
4213         if (priv->internal_phy)
4214                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
4215
4216         bcmgenet_umac_reset(priv);
4217
4218         init_umac(priv);
4219
4220         phy_init_hw(dev->phydev);
4221
4222         /* Speed settings must be restored */
4223         genphy_config_aneg(dev->phydev);
4224         bcmgenet_mii_config(priv->dev, false);
4225
4226         /* Restore enabled features */
4227         bcmgenet_set_features(dev, dev->features);
4228
4229         bcmgenet_set_hw_addr(priv, dev->dev_addr);
4230
4231         /* Restore hardware filters */
4232         bcmgenet_hfb_clear(priv);
4233         list_for_each_entry(rule, &priv->rxnfc_list, list)
4234                 if (rule->state != BCMGENET_RXNFC_STATE_UNUSED)
4235                         bcmgenet_hfb_create_rxnfc_filter(priv, rule);
4236
4237         /* Disable RX/TX DMA and flush TX queues */
4238         dma_ctrl = bcmgenet_dma_disable(priv);
4239
4240         /* Reinitialize TDMA and RDMA and SW housekeeping */
4241         ret = bcmgenet_init_dma(priv);
4242         if (ret) {
4243                 netdev_err(dev, "failed to initialize DMA\n");
4244                 goto out_clk_disable;
4245         }
4246
4247         /* Always enable ring 16 - descriptor ring */
4248         bcmgenet_enable_dma(priv, dma_ctrl);
4249
4250         if (!device_may_wakeup(d))
4251                 phy_resume(dev->phydev);
4252
4253         bcmgenet_netif_start(dev);
4254
4255         netif_device_attach(dev);
4256
4257         return 0;
4258
4259 out_clk_disable:
4260         if (priv->internal_phy)
4261                 bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
4262         clk_disable_unprepare(priv->clk);
4263         return ret;
4264 }
4265
4266 static int bcmgenet_suspend(struct device *d)
4267 {
4268         struct net_device *dev = dev_get_drvdata(d);
4269         struct bcmgenet_priv *priv = netdev_priv(dev);
4270
4271         if (!netif_running(dev))
4272                 return 0;
4273
4274         netif_device_detach(dev);
4275
4276         bcmgenet_netif_stop(dev, true);
4277
4278         if (!device_may_wakeup(d))
4279                 phy_suspend(dev->phydev);
4280
4281         /* Disable filtering */
4282         bcmgenet_hfb_reg_writel(priv, 0, HFB_CTRL);
4283
4284         return 0;
4285 }
4286
4287 static int bcmgenet_suspend_noirq(struct device *d)
4288 {
4289         struct net_device *dev = dev_get_drvdata(d);
4290         struct bcmgenet_priv *priv = netdev_priv(dev);
4291         int ret = 0;
4292
4293         if (!netif_running(dev))
4294                 return 0;
4295
4296         /* Prepare the device for Wake-on-LAN and switch to the slow clock */
4297         if (device_may_wakeup(d) && priv->wolopts)
4298                 ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
4299         else if (priv->internal_phy)
4300                 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
4301
4302         /* Let the framework handle resumption and leave the clocks on */
4303         if (ret)
4304                 return ret;
4305
4306         /* Turn off the clocks */
4307         clk_disable_unprepare(priv->clk);
4308
4309         return 0;
4310 }
4311 #else
4312 #define bcmgenet_suspend        NULL
4313 #define bcmgenet_suspend_noirq  NULL
4314 #define bcmgenet_resume         NULL
4315 #define bcmgenet_resume_noirq   NULL
4316 #endif /* CONFIG_PM_SLEEP */
4317
4318 static const struct dev_pm_ops bcmgenet_pm_ops = {
4319         .suspend        = bcmgenet_suspend,
4320         .suspend_noirq  = bcmgenet_suspend_noirq,
4321         .resume         = bcmgenet_resume,
4322         .resume_noirq   = bcmgenet_resume_noirq,
4323 };
4324
4325 static const struct acpi_device_id genet_acpi_match[] = {
4326         { "BCM6E4E", (kernel_ulong_t)&bcm2711_plat_data },
4327         { },
4328 };
4329 MODULE_DEVICE_TABLE(acpi, genet_acpi_match);
4330
4331 static struct platform_driver bcmgenet_driver = {
4332         .probe  = bcmgenet_probe,
4333         .remove_new = bcmgenet_remove,
4334         .shutdown = bcmgenet_shutdown,
4335         .driver = {
4336                 .name   = "bcmgenet",
4337                 .of_match_table = bcmgenet_match,
4338                 .pm     = &bcmgenet_pm_ops,
4339                 .acpi_match_table = genet_acpi_match,
4340         },
4341 };
4342 module_platform_driver(bcmgenet_driver);
4343
4344 MODULE_AUTHOR("Broadcom Corporation");
4345 MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver");
4346 MODULE_ALIAS("platform:bcmgenet");
4347 MODULE_LICENSE("GPL");
4348 MODULE_SOFTDEP("pre: mdio-bcm-unimac");