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 static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
 121                                           void __iomem *d)
 122 {
 123         dma_addr_t addr;
 124
 125         addr = bcmgenet_readl(d + DMA_DESC_ADDRESS_LO);
 126
 127         /* Register writes to GISB bus can take couple hundred nanoseconds
 128          * and are done for each packet, save these expensive writes unless
 129          * the platform is explicitly configured for 64-bits/LPAE.
 130          */
 131 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 132         if (priv->hw_params->flags & GENET_HAS_40BITS)
 133                 addr |= (u64)bcmgenet_readl(d + DMA_DESC_ADDRESS_HI) << 32;
 134 #endif
 135         return addr;
 136 }
 137
 138 #define GENET_VER_FMT   "%1d.%1d EPHY: 0x%04x"
 139
 140 #define GENET_MSG_DEFAULT       (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
 141                                 NETIF_MSG_LINK)
 142
 143 static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
 144 {
 145         if (GENET_IS_V1(priv))
 146                 return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
 147         else
 148                 return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
 149 }
 150
 151 static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
 152 {
 153         if (GENET_IS_V1(priv))
 154                 bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
 155         else
 156                 bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
 157 }
 158
 159 /* These macros are defined to deal with register map change
 160  * between GENET1.1 and GENET2. Only those currently being used
 161  * by driver are defined.
 162  */
 163 static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
 164 {
 165         if (GENET_IS_V1(priv))
 166                 return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
 167         else
 168                 return bcmgenet_readl(priv->base +
 169                                       priv->hw_params->tbuf_offset + TBUF_CTRL);
 170 }
 171
 172 static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
 173 {
 174         if (GENET_IS_V1(priv))
 175                 bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
 176         else
 177                 bcmgenet_writel(val, priv->base +
 178                                 priv->hw_params->tbuf_offset + TBUF_CTRL);
 179 }
 180
 181 static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
 182 {
 183         if (GENET_IS_V1(priv))
 184                 return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
 185         else
 186                 return bcmgenet_readl(priv->base +
 187                                       priv->hw_params->tbuf_offset + TBUF_BP_MC);
 188 }
 189
 190 static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
 191 {
 192         if (GENET_IS_V1(priv))
 193                 bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
 194         else
 195                 bcmgenet_writel(val, priv->base +
 196                                 priv->hw_params->tbuf_offset + TBUF_BP_MC);
 197 }
 198
 199 /* RX/TX DMA register accessors */
 200 enum dma_reg {
 201         DMA_RING_CFG = 0,
 202         DMA_CTRL,
 203         DMA_STATUS,
 204         DMA_SCB_BURST_SIZE,
 205         DMA_ARB_CTRL,
 206         DMA_PRIORITY_0,
 207         DMA_PRIORITY_1,
 208         DMA_PRIORITY_2,
 209         DMA_INDEX2RING_0,
 210         DMA_INDEX2RING_1,
 211         DMA_INDEX2RING_2,
 212         DMA_INDEX2RING_3,
 213         DMA_INDEX2RING_4,
 214         DMA_INDEX2RING_5,
 215         DMA_INDEX2RING_6,
 216         DMA_INDEX2RING_7,
 217         DMA_RING0_TIMEOUT,
 218         DMA_RING1_TIMEOUT,
 219         DMA_RING2_TIMEOUT,
 220         DMA_RING3_TIMEOUT,
 221         DMA_RING4_TIMEOUT,
 222         DMA_RING5_TIMEOUT,
 223         DMA_RING6_TIMEOUT,
 224         DMA_RING7_TIMEOUT,
 225         DMA_RING8_TIMEOUT,
 226         DMA_RING9_TIMEOUT,
 227         DMA_RING10_TIMEOUT,
 228         DMA_RING11_TIMEOUT,
 229         DMA_RING12_TIMEOUT,
 230         DMA_RING13_TIMEOUT,
 231         DMA_RING14_TIMEOUT,
 232         DMA_RING15_TIMEOUT,
 233         DMA_RING16_TIMEOUT,
 234 };
 235
 236 static const u8 bcmgenet_dma_regs_v3plus[] = {
 237         [DMA_RING_CFG]          = 0x00,
 238         [DMA_CTRL]              = 0x04,
 239         [DMA_STATUS]            = 0x08,
 240         [DMA_SCB_BURST_SIZE]    = 0x0C,
 241         [DMA_ARB_CTRL]          = 0x2C,
 242         [DMA_PRIORITY_0]        = 0x30,
 243         [DMA_PRIORITY_1]        = 0x34,
 244         [DMA_PRIORITY_2]        = 0x38,
 245         [DMA_RING0_TIMEOUT]     = 0x2C,
 246         [DMA_RING1_TIMEOUT]     = 0x30,
 247         [DMA_RING2_TIMEOUT]     = 0x34,
 248         [DMA_RING3_TIMEOUT]     = 0x38,
 249         [DMA_RING4_TIMEOUT]     = 0x3c,
 250         [DMA_RING5_TIMEOUT]     = 0x40,
 251         [DMA_RING6_TIMEOUT]     = 0x44,
 252         [DMA_RING7_TIMEOUT]     = 0x48,
 253         [DMA_RING8_TIMEOUT]     = 0x4c,
 254         [DMA_RING9_TIMEOUT]     = 0x50,
 255         [DMA_RING10_TIMEOUT]    = 0x54,
 256         [DMA_RING11_TIMEOUT]    = 0x58,
 257         [DMA_RING12_TIMEOUT]    = 0x5c,
 258         [DMA_RING13_TIMEOUT]    = 0x60,
 259         [DMA_RING14_TIMEOUT]    = 0x64,
 260         [DMA_RING15_TIMEOUT]    = 0x68,
 261         [DMA_RING16_TIMEOUT]    = 0x6C,
 262         [DMA_INDEX2RING_0]      = 0x70,
 263         [DMA_INDEX2RING_1]      = 0x74,
 264         [DMA_INDEX2RING_2]      = 0x78,
 265         [DMA_INDEX2RING_3]      = 0x7C,
 266         [DMA_INDEX2RING_4]      = 0x80,
 267         [DMA_INDEX2RING_5]      = 0x84,
 268         [DMA_INDEX2RING_6]      = 0x88,
 269         [DMA_INDEX2RING_7]      = 0x8C,
 270 };
 271
 272 static const u8 bcmgenet_dma_regs_v2[] = {
 273         [DMA_RING_CFG]          = 0x00,
 274         [DMA_CTRL]              = 0x04,
 275         [DMA_STATUS]            = 0x08,
 276         [DMA_SCB_BURST_SIZE]    = 0x0C,
 277         [DMA_ARB_CTRL]          = 0x30,
 278         [DMA_PRIORITY_0]        = 0x34,
 279         [DMA_PRIORITY_1]        = 0x38,
 280         [DMA_PRIORITY_2]        = 0x3C,
 281         [DMA_RING0_TIMEOUT]     = 0x2C,
 282         [DMA_RING1_TIMEOUT]     = 0x30,
 283         [DMA_RING2_TIMEOUT]     = 0x34,
 284         [DMA_RING3_TIMEOUT]     = 0x38,
 285         [DMA_RING4_TIMEOUT]     = 0x3c,
 286         [DMA_RING5_TIMEOUT]     = 0x40,
 287         [DMA_RING6_TIMEOUT]     = 0x44,
 288         [DMA_RING7_TIMEOUT]     = 0x48,
 289         [DMA_RING8_TIMEOUT]     = 0x4c,
 290         [DMA_RING9_TIMEOUT]     = 0x50,
 291         [DMA_RING10_TIMEOUT]    = 0x54,
 292         [DMA_RING11_TIMEOUT]    = 0x58,
 293         [DMA_RING12_TIMEOUT]    = 0x5c,
 294         [DMA_RING13_TIMEOUT]    = 0x60,
 295         [DMA_RING14_TIMEOUT]    = 0x64,
 296         [DMA_RING15_TIMEOUT]    = 0x68,
 297         [DMA_RING16_TIMEOUT]    = 0x6C,
 298 };
 299
 300 static const u8 bcmgenet_dma_regs_v1[] = {
 301         [DMA_CTRL]              = 0x00,
 302         [DMA_STATUS]            = 0x04,
 303         [DMA_SCB_BURST_SIZE]    = 0x0C,
 304         [DMA_ARB_CTRL]          = 0x30,
 305         [DMA_PRIORITY_0]        = 0x34,
 306         [DMA_PRIORITY_1]        = 0x38,
 307         [DMA_PRIORITY_2]        = 0x3C,
 308         [DMA_RING0_TIMEOUT]     = 0x2C,
 309         [DMA_RING1_TIMEOUT]     = 0x30,
 310         [DMA_RING2_TIMEOUT]     = 0x34,
 311         [DMA_RING3_TIMEOUT]     = 0x38,
 312         [DMA_RING4_TIMEOUT]     = 0x3c,
 313         [DMA_RING5_TIMEOUT]     = 0x40,
 314         [DMA_RING6_TIMEOUT]     = 0x44,
 315         [DMA_RING7_TIMEOUT]     = 0x48,
 316         [DMA_RING8_TIMEOUT]     = 0x4c,
 317         [DMA_RING9_TIMEOUT]     = 0x50,
 318         [DMA_RING10_TIMEOUT]    = 0x54,
 319         [DMA_RING11_TIMEOUT]    = 0x58,
 320         [DMA_RING12_TIMEOUT]    = 0x5c,
 321         [DMA_RING13_TIMEOUT]    = 0x60,
 322         [DMA_RING14_TIMEOUT]    = 0x64,
 323         [DMA_RING15_TIMEOUT]    = 0x68,
 324         [DMA_RING16_TIMEOUT]    = 0x6C,
 325 };
 326
 327 /* Set at runtime once bcmgenet version is known */
 328 static const u8 *bcmgenet_dma_regs;
 329
 330 static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
 331 {
 332         return netdev_priv(dev_get_drvdata(dev));
 333 }
 334
 335 static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
 336                                       enum dma_reg r)
 337 {
 338         return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
 339                               DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 340 }
 341
 342 static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
 343                                         u32 val, enum dma_reg r)
 344 {
 345         bcmgenet_writel(val, priv->base + GENET_TDMA_REG_OFF +
 346                         DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 347 }
 348
 349 static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
 350                                       enum dma_reg r)
 351 {
 352         return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
 353                               DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 354 }
 355
 356 static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
 357                                         u32 val, enum dma_reg r)
 358 {
 359         bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
 360                         DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
 361 }
 362
 363 /* RDMA/TDMA ring registers and accessors
 364  * we merge the common fields and just prefix with T/D the registers
 365  * having different meaning depending on the direction
 366  */
 367 enum dma_ring_reg {
 368         TDMA_READ_PTR = 0,
 369         RDMA_WRITE_PTR = TDMA_READ_PTR,
 370         TDMA_READ_PTR_HI,
 371         RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
 372         TDMA_CONS_INDEX,
 373         RDMA_PROD_INDEX = TDMA_CONS_INDEX,
 374         TDMA_PROD_INDEX,
 375         RDMA_CONS_INDEX = TDMA_PROD_INDEX,
 376         DMA_RING_BUF_SIZE,
 377         DMA_START_ADDR,
 378         DMA_START_ADDR_HI,
 379         DMA_END_ADDR,
 380         DMA_END_ADDR_HI,
 381         DMA_MBUF_DONE_THRESH,
 382         TDMA_FLOW_PERIOD,
 383         RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
 384         TDMA_WRITE_PTR,
 385         RDMA_READ_PTR = TDMA_WRITE_PTR,
 386         TDMA_WRITE_PTR_HI,
 387         RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
 388 };
 389
 390 /* GENET v4 supports 40-bits pointer addressing
 391  * for obvious reasons the LO and HI word parts
 392  * are contiguous, but this offsets the other
 393  * registers.
 394  */
 395 static const u8 genet_dma_ring_regs_v4[] = {
 396         [TDMA_READ_PTR]                 = 0x00,
 397         [TDMA_READ_PTR_HI]              = 0x04,
 398         [TDMA_CONS_INDEX]               = 0x08,
 399         [TDMA_PROD_INDEX]               = 0x0C,
 400         [DMA_RING_BUF_SIZE]             = 0x10,
 401         [DMA_START_ADDR]                = 0x14,
 402         [DMA_START_ADDR_HI]             = 0x18,
 403         [DMA_END_ADDR]                  = 0x1C,
 404         [DMA_END_ADDR_HI]               = 0x20,
 405         [DMA_MBUF_DONE_THRESH]          = 0x24,
 406         [TDMA_FLOW_PERIOD]              = 0x28,
 407         [TDMA_WRITE_PTR]                = 0x2C,
 408         [TDMA_WRITE_PTR_HI]             = 0x30,
 409 };
 410
 411 static const u8 genet_dma_ring_regs_v123[] = {
 412         [TDMA_READ_PTR]                 = 0x00,
 413         [TDMA_CONS_INDEX]               = 0x04,
 414         [TDMA_PROD_INDEX]               = 0x08,
 415         [DMA_RING_BUF_SIZE]             = 0x0C,
 416         [DMA_START_ADDR]                = 0x10,
 417         [DMA_END_ADDR]                  = 0x14,
 418         [DMA_MBUF_DONE_THRESH]          = 0x18,
 419         [TDMA_FLOW_PERIOD]              = 0x1C,
 420         [TDMA_WRITE_PTR]                = 0x20,
 421 };
 422
 423 /* Set at runtime once GENET version is known */
 424 static const u8 *genet_dma_ring_regs;
 425
 426 static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
 427                                            unsigned int ring,
 428                                            enum dma_ring_reg r)
 429 {
 430         return bcmgenet_readl(priv->base + GENET_TDMA_REG_OFF +
 431                               (DMA_RING_SIZE * ring) +
 432                               genet_dma_ring_regs[r]);
 433 }
 434
 435 static inline void bcmgenet_tdma_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_TDMA_REG_OFF +
 440                         (DMA_RING_SIZE * ring) +
 441                         genet_dma_ring_regs[r]);
 442 }
 443
 444 static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
 445                                            unsigned int ring,
 446                                            enum dma_ring_reg r)
 447 {
 448         return bcmgenet_readl(priv->base + GENET_RDMA_REG_OFF +
 449                               (DMA_RING_SIZE * ring) +
 450                               genet_dma_ring_regs[r]);
 451 }
 452
 453 static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
 454                                              unsigned int ring, u32 val,
 455                                              enum dma_ring_reg r)
 456 {
 457         bcmgenet_writel(val, priv->base + GENET_RDMA_REG_OFF +
 458                         (DMA_RING_SIZE * ring) +
 459                         genet_dma_ring_regs[r]);
 460 }
 461
 462 static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
 463 {
 464         u32 offset;
 465         u32 reg;
 466
 467         offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
 468         reg = bcmgenet_hfb_reg_readl(priv, offset);
 469         reg |= (1 << (f_index % 32));
 470         bcmgenet_hfb_reg_writel(priv, reg, offset);
 471         reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
 472         reg |= RBUF_HFB_EN;
 473         bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
 474 }
 475
 476 static void bcmgenet_hfb_disable_filter(struct bcmgenet_priv *priv, u32 f_index)
 477 {
 478         u32 offset, reg, reg1;
 479
 480         offset = HFB_FLT_ENABLE_V3PLUS;
 481         reg = bcmgenet_hfb_reg_readl(priv, offset);
 482         reg1 = bcmgenet_hfb_reg_readl(priv, offset + sizeof(u32));
 483         if  (f_index < 32) {
 484                 reg1 &= ~(1 << (f_index % 32));
 485                 bcmgenet_hfb_reg_writel(priv, reg1, offset + sizeof(u32));
 486         } else {
 487                 reg &= ~(1 << (f_index % 32));
 488                 bcmgenet_hfb_reg_writel(priv, reg, offset);
 489         }
 490         if (!reg && !reg1) {
 491                 reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
 492                 reg &= ~RBUF_HFB_EN;
 493                 bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
 494         }
 495 }
 496
 497 static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
 498                                                      u32 f_index, u32 rx_queue)
 499 {
 500         u32 offset;
 501         u32 reg;
 502
 503         offset = f_index / 8;
 504         reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
 505         reg &= ~(0xF << (4 * (f_index % 8)));
 506         reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
 507         bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
 508 }
 509
 510 static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
 511                                            u32 f_index, u32 f_length)
 512 {
 513         u32 offset;
 514         u32 reg;
 515
 516         offset = HFB_FLT_LEN_V3PLUS +
 517                  ((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
 518                  sizeof(u32);
 519         reg = bcmgenet_hfb_reg_readl(priv, offset);
 520         reg &= ~(0xFF << (8 * (f_index % 4)));
 521         reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
 522         bcmgenet_hfb_reg_writel(priv, reg, offset);
 523 }
 524
 525 static int bcmgenet_hfb_validate_mask(void *mask, size_t size)
 526 {
 527         while (size) {
 528                 switch (*(unsigned char *)mask++) {
 529                 case 0x00:
 530                 case 0x0f:
 531                 case 0xf0:
 532                 case 0xff:
 533                         size--;
 534                         continue;
 535                 default:
 536                         return -EINVAL;
 537                 }
 538         }
 539
 540         return 0;
 541 }
 542
 543 #define VALIDATE_MASK(x) \
 544         bcmgenet_hfb_validate_mask(&(x), sizeof(x))
 545
 546 static int bcmgenet_hfb_insert_data(struct bcmgenet_priv *priv, u32 f_index,
 547                                     u32 offset, void *val, void *mask,
 548                                     size_t size)
 549 {
 550         u32 index, tmp;
 551
 552         index = f_index * priv->hw_params->hfb_filter_size + offset / 2;
 553         tmp = bcmgenet_hfb_readl(priv, index * sizeof(u32));
 554
 555         while (size--) {
 556                 if (offset++ & 1) {
 557                         tmp &= ~0x300FF;
 558                         tmp |= (*(unsigned char *)val++);
 559                         switch ((*(unsigned char *)mask++)) {
 560                         case 0xFF:
 561                                 tmp |= 0x30000;
 562                                 break;
 563                         case 0xF0:
 564                                 tmp |= 0x20000;
 565                                 break;
 566                         case 0x0F:
 567                                 tmp |= 0x10000;
 568                                 break;
 569                         }
 570                         bcmgenet_hfb_writel(priv, tmp, index++ * sizeof(u32));
 571                         if (size)
 572                                 tmp = bcmgenet_hfb_readl(priv,
 573                                                          index * sizeof(u32));
 574                 } else {
 575                         tmp &= ~0xCFF00;
 576                         tmp |= (*(unsigned char *)val++) << 8;
 577                         switch ((*(unsigned char *)mask++)) {
 578                         case 0xFF:
 579                                 tmp |= 0xC0000;
 580                                 break;
 581                         case 0xF0:
 582                                 tmp |= 0x80000;
 583                                 break;
 584                         case 0x0F:
 585                                 tmp |= 0x40000;
 586                                 break;
 587                         }
 588                         if (!size)
 589                                 bcmgenet_hfb_writel(priv, tmp, index * sizeof(u32));
 590                 }
 591         }
 592
 593         return 0;
 594 }
 595
 596 static void bcmgenet_hfb_create_rxnfc_filter(struct bcmgenet_priv *priv,
 597                                              struct bcmgenet_rxnfc_rule *rule)
 598 {
 599         struct ethtool_rx_flow_spec *fs = &rule->fs;
 600         u32 offset = 0, f_length = 0, f;
 601         u8 val_8, mask_8;
 602         __be16 val_16;
 603         u16 mask_16;
 604         size_t size;
 605
 606         f = fs->location;
 607         if (fs->flow_type & FLOW_MAC_EXT) {
 608                 bcmgenet_hfb_insert_data(priv, f, 0,
 609                                          &fs->h_ext.h_dest, &fs->m_ext.h_dest,
 610                                          sizeof(fs->h_ext.h_dest));
 611         }
 612
 613         if (fs->flow_type & FLOW_EXT) {
 614                 if (fs->m_ext.vlan_etype ||
 615                     fs->m_ext.vlan_tci) {
 616                         bcmgenet_hfb_insert_data(priv, f, 12,
 617                                                  &fs->h_ext.vlan_etype,
 618                                                  &fs->m_ext.vlan_etype,
 619                                                  sizeof(fs->h_ext.vlan_etype));
 620                         bcmgenet_hfb_insert_data(priv, f, 14,
 621                                                  &fs->h_ext.vlan_tci,
 622                                                  &fs->m_ext.vlan_tci,
 623                                                  sizeof(fs->h_ext.vlan_tci));
 624                         offset += VLAN_HLEN;
 625                         f_length += DIV_ROUND_UP(VLAN_HLEN, 2);
 626                 }
 627         }
 628
 629         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
 630         case ETHER_FLOW:
 631                 f_length += DIV_ROUND_UP(ETH_HLEN, 2);
 632                 bcmgenet_hfb_insert_data(priv, f, 0,
 633                                          &fs->h_u.ether_spec.h_dest,
 634                                          &fs->m_u.ether_spec.h_dest,
 635                                          sizeof(fs->h_u.ether_spec.h_dest));
 636                 bcmgenet_hfb_insert_data(priv, f, ETH_ALEN,
 637                                          &fs->h_u.ether_spec.h_source,
 638                                          &fs->m_u.ether_spec.h_source,
 639                                          sizeof(fs->h_u.ether_spec.h_source));
 640                 bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
 641                                          &fs->h_u.ether_spec.h_proto,
 642                                          &fs->m_u.ether_spec.h_proto,
 643                                          sizeof(fs->h_u.ether_spec.h_proto));
 644                 break;
 645         case IP_USER_FLOW:
 646                 f_length += DIV_ROUND_UP(ETH_HLEN + 20, 2);
 647                 /* Specify IP Ether Type */
 648                 val_16 = htons(ETH_P_IP);
 649                 mask_16 = 0xFFFF;
 650                 bcmgenet_hfb_insert_data(priv, f, (2 * ETH_ALEN) + offset,
 651                                          &val_16, &mask_16, sizeof(val_16));
 652                 bcmgenet_hfb_insert_data(priv, f, 15 + offset,
 653                                          &fs->h_u.usr_ip4_spec.tos,
 654                                          &fs->m_u.usr_ip4_spec.tos,
 655                                          sizeof(fs->h_u.usr_ip4_spec.tos));
 656                 bcmgenet_hfb_insert_data(priv, f, 23 + offset,
 657                                          &fs->h_u.usr_ip4_spec.proto,
 658                                          &fs->m_u.usr_ip4_spec.proto,
 659                                          sizeof(fs->h_u.usr_ip4_spec.proto));
 660                 bcmgenet_hfb_insert_data(priv, f, 26 + offset,
 661                                          &fs->h_u.usr_ip4_spec.ip4src,
 662                                          &fs->m_u.usr_ip4_spec.ip4src,
 663                                          sizeof(fs->h_u.usr_ip4_spec.ip4src));
 664                 bcmgenet_hfb_insert_data(priv, f, 30 + offset,
 665                                          &fs->h_u.usr_ip4_spec.ip4dst,
 666                                          &fs->m_u.usr_ip4_spec.ip4dst,
 667                                          sizeof(fs->h_u.usr_ip4_spec.ip4dst));
 668                 if (!fs->m_u.usr_ip4_spec.l4_4_bytes)
 669                         break;
 670
 671                 /* Only supports 20 byte IPv4 header */
 672                 val_8 = 0x45;
 673                 mask_8 = 0xFF;
 674                 bcmgenet_hfb_insert_data(priv, f, ETH_HLEN + offset,
 675                                          &val_8, &mask_8,
 676                                          sizeof(val_8));
 677                 size = sizeof(fs->h_u.usr_ip4_spec.l4_4_bytes);
 678                 bcmgenet_hfb_insert_data(priv, f,
 679                                          ETH_HLEN + 20 + offset,
 680                                          &fs->h_u.usr_ip4_spec.l4_4_bytes,
 681                                          &fs->m_u.usr_ip4_spec.l4_4_bytes,
 682                                          size);
 683                 f_length += DIV_ROUND_UP(size, 2);
 684                 break;
 685         }
 686
 687         bcmgenet_hfb_set_filter_length(priv, f, 2 * f_length);
 688         if (!fs->ring_cookie || fs->ring_cookie == RX_CLS_FLOW_WAKE) {
 689                 /* Ring 0 flows can be handled by the default Descriptor Ring
 690                  * We'll map them to ring 0, but don't enable the filter
 691                  */
 692                 bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f, 0);
 693                 rule->state = BCMGENET_RXNFC_STATE_DISABLED;
 694         } else {
 695                 /* Other Rx rings are direct mapped here */
 696                 bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f,
 697                                                          fs->ring_cookie);
 698                 bcmgenet_hfb_enable_filter(priv, f);
 699                 rule->state = BCMGENET_RXNFC_STATE_ENABLED;
 700         }
 701 }
 702
 703 /* bcmgenet_hfb_clear
 704  *
 705  * Clear Hardware Filter Block and disable all filtering.
 706  */
 707 static void bcmgenet_hfb_clear_filter(struct bcmgenet_priv *priv, u32 f_index)
 708 {
 709         u32 base, i;
 710
 711         base = f_index * priv->hw_params->hfb_filter_size;
 712         for (i = 0; i < priv->hw_params->hfb_filter_size; i++)
 713                 bcmgenet_hfb_writel(priv, 0x0, (base + i) * sizeof(u32));
 714 }
 715
 716 static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
 717 {
 718         u32 i;
 719
 720         if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
 721                 return;
 722
 723         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_CTRL);
 724         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS);
 725         bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS + 4);
 726
 727         for (i = DMA_INDEX2RING_0; i <= DMA_INDEX2RING_7; i++)
 728                 bcmgenet_rdma_writel(priv, 0x0, i);
 729
 730         for (i = 0; i < (priv->hw_params->hfb_filter_cnt / 4); i++)
 731                 bcmgenet_hfb_reg_writel(priv, 0x0,
 732                                         HFB_FLT_LEN_V3PLUS + i * sizeof(u32));
 733
 734         for (i = 0; i < priv->hw_params->hfb_filter_cnt; i++)
 735                 bcmgenet_hfb_clear_filter(priv, i);
 736 }
 737
 738 static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
 739 {
 740         int i;
 741
 742         INIT_LIST_HEAD(&priv->rxnfc_list);
 743         if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
 744                 return;
 745
 746         for (i = 0; i < MAX_NUM_OF_FS_RULES; i++) {
 747                 INIT_LIST_HEAD(&priv->rxnfc_rules[i].list);
 748                 priv->rxnfc_rules[i].state = BCMGENET_RXNFC_STATE_UNUSED;
 749         }
 750
 751         bcmgenet_hfb_clear(priv);
 752 }
 753
 754 static int bcmgenet_begin(struct net_device *dev)
 755 {
 756         struct bcmgenet_priv *priv = netdev_priv(dev);
 757
 758         /* Turn on the clock */
 759         return clk_prepare_enable(priv->clk);
 760 }
 761
 762 static void bcmgenet_complete(struct net_device *dev)
 763 {
 764         struct bcmgenet_priv *priv = netdev_priv(dev);
 765
 766         /* Turn off the clock */
 767         clk_disable_unprepare(priv->clk);
 768 }
 769
 770 static int bcmgenet_get_link_ksettings(struct net_device *dev,
 771                                        struct ethtool_link_ksettings *cmd)
 772 {
 773         if (!netif_running(dev))
 774                 return -EINVAL;
 775
 776         if (!dev->phydev)
 777                 return -ENODEV;
 778
 779         phy_ethtool_ksettings_get(dev->phydev, cmd);
 780
 781         return 0;
 782 }
 783
 784 static int bcmgenet_set_link_ksettings(struct net_device *dev,
 785                                        const struct ethtool_link_ksettings *cmd)
 786 {
 787         if (!netif_running(dev))
 788                 return -EINVAL;
 789
 790         if (!dev->phydev)
 791                 return -ENODEV;
 792
 793         return phy_ethtool_ksettings_set(dev->phydev, cmd);
 794 }
 795
 796 static int bcmgenet_set_features(struct net_device *dev,
 797                                  netdev_features_t features)
 798 {
 799         struct bcmgenet_priv *priv = netdev_priv(dev);
 800         u32 reg;
 801         int ret;
 802
 803         ret = clk_prepare_enable(priv->clk);
 804         if (ret)
 805                 return ret;
 806
 807         /* Make sure we reflect the value of CRC_CMD_FWD */
 808         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
 809         priv->crc_fwd_en = !!(reg & CMD_CRC_FWD);
 810
 811         clk_disable_unprepare(priv->clk);
 812
 813         return ret;
 814 }
 815
 816 static u32 bcmgenet_get_msglevel(struct net_device *dev)
 817 {
 818         struct bcmgenet_priv *priv = netdev_priv(dev);
 819
 820         return priv->msg_enable;
 821 }
 822
 823 static void bcmgenet_set_msglevel(struct net_device *dev, u32 level)
 824 {
 825         struct bcmgenet_priv *priv = netdev_priv(dev);
 826
 827         priv->msg_enable = level;
 828 }
 829
 830 static int bcmgenet_get_coalesce(struct net_device *dev,
 831                                  struct ethtool_coalesce *ec,
 832                                  struct kernel_ethtool_coalesce *kernel_coal,
 833                                  struct netlink_ext_ack *extack)
 834 {
 835         struct bcmgenet_priv *priv = netdev_priv(dev);
 836         struct bcmgenet_rx_ring *ring;
 837         unsigned int i;
 838
 839         ec->tx_max_coalesced_frames =
 840                 bcmgenet_tdma_ring_readl(priv, DESC_INDEX,
 841                                          DMA_MBUF_DONE_THRESH);
 842         ec->rx_max_coalesced_frames =
 843                 bcmgenet_rdma_ring_readl(priv, DESC_INDEX,
 844                                          DMA_MBUF_DONE_THRESH);
 845         ec->rx_coalesce_usecs =
 846                 bcmgenet_rdma_readl(priv, DMA_RING16_TIMEOUT) * 8192 / 1000;
 847
 848         for (i = 0; i < priv->hw_params->rx_queues; i++) {
 849                 ring = &priv->rx_rings[i];
 850                 ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
 851         }
 852         ring = &priv->rx_rings[DESC_INDEX];
 853         ec->use_adaptive_rx_coalesce |= ring->dim.use_dim;
 854
 855         return 0;
 856 }
 857
 858 static void bcmgenet_set_rx_coalesce(struct bcmgenet_rx_ring *ring,
 859                                      u32 usecs, u32 pkts)
 860 {
 861         struct bcmgenet_priv *priv = ring->priv;
 862         unsigned int i = ring->index;
 863         u32 reg;
 864
 865         bcmgenet_rdma_ring_writel(priv, i, pkts, DMA_MBUF_DONE_THRESH);
 866
 867         reg = bcmgenet_rdma_readl(priv, DMA_RING0_TIMEOUT + i);
 868         reg &= ~DMA_TIMEOUT_MASK;
 869         reg |= DIV_ROUND_UP(usecs * 1000, 8192);
 870         bcmgenet_rdma_writel(priv, reg, DMA_RING0_TIMEOUT + i);
 871 }
 872
 873 static void bcmgenet_set_ring_rx_coalesce(struct bcmgenet_rx_ring *ring,
 874                                           struct ethtool_coalesce *ec)
 875 {
 876         struct dim_cq_moder moder;
 877         u32 usecs, pkts;
 878
 879         ring->rx_coalesce_usecs = ec->rx_coalesce_usecs;
 880         ring->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
 881         usecs = ring->rx_coalesce_usecs;
 882         pkts = ring->rx_max_coalesced_frames;
 883
 884         if (ec->use_adaptive_rx_coalesce && !ring->dim.use_dim) {
 885                 moder = net_dim_get_def_rx_moderation(ring->dim.dim.mode);
 886                 usecs = moder.usec;
 887                 pkts = moder.pkts;
 888         }
 889
 890         ring->dim.use_dim = ec->use_adaptive_rx_coalesce;
 891         bcmgenet_set_rx_coalesce(ring, usecs, pkts);
 892 }
 893
 894 static int bcmgenet_set_coalesce(struct net_device *dev,
 895                                  struct ethtool_coalesce *ec,
 896                                  struct kernel_ethtool_coalesce *kernel_coal,
 897                                  struct netlink_ext_ack *extack)
 898 {
 899         struct bcmgenet_priv *priv = netdev_priv(dev);
 900         unsigned int i;
 901
 902         /* Base system clock is 125Mhz, DMA timeout is this reference clock
 903          * divided by 1024, which yields roughly 8.192us, our maximum value
 904          * has to fit in the DMA_TIMEOUT_MASK (16 bits)
 905          */
 906         if (ec->tx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
 907             ec->tx_max_coalesced_frames == 0 ||
 908             ec->rx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
 909             ec->rx_coalesce_usecs > (DMA_TIMEOUT_MASK * 8) + 1)
 910                 return -EINVAL;
 911
 912         if (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)
 913                 return -EINVAL;
 914
 915         /* GENET TDMA hardware does not support a configurable timeout, but will
 916          * always generate an interrupt either after MBDONE packets have been
 917          * transmitted, or when the ring is empty.
 918          */
 919
 920         /* Program all TX queues with the same values, as there is no
 921          * ethtool knob to do coalescing on a per-queue basis
 922          */
 923         for (i = 0; i < priv->hw_params->tx_queues; i++)
 924                 bcmgenet_tdma_ring_writel(priv, i,
 925                                           ec->tx_max_coalesced_frames,
 926                                           DMA_MBUF_DONE_THRESH);
 927         bcmgenet_tdma_ring_writel(priv, DESC_INDEX,
 928                                   ec->tx_max_coalesced_frames,
 929                                   DMA_MBUF_DONE_THRESH);
 930
 931         for (i = 0; i < priv->hw_params->rx_queues; i++)
 932                 bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[i], ec);
 933         bcmgenet_set_ring_rx_coalesce(&priv->rx_rings[DESC_INDEX], ec);
 934
 935         return 0;
 936 }
 937
 938 static void bcmgenet_get_pauseparam(struct net_device *dev,
 939                                     struct ethtool_pauseparam *epause)
 940 {
 941         struct bcmgenet_priv *priv;
 942         u32 umac_cmd;
 943
 944         priv = netdev_priv(dev);
 945
 946         epause->autoneg = priv->autoneg_pause;
 947
 948         if (netif_carrier_ok(dev)) {
 949                 /* report active state when link is up */
 950                 umac_cmd = bcmgenet_umac_readl(priv, UMAC_CMD);
 951                 epause->tx_pause = !(umac_cmd & CMD_TX_PAUSE_IGNORE);
 952                 epause->rx_pause = !(umac_cmd & CMD_RX_PAUSE_IGNORE);
 953         } else {
 954                 /* otherwise report stored settings */
 955                 epause->tx_pause = priv->tx_pause;
 956                 epause->rx_pause = priv->rx_pause;
 957         }
 958 }
 959
 960 static int bcmgenet_set_pauseparam(struct net_device *dev,
 961                                    struct ethtool_pauseparam *epause)
 962 {
 963         struct bcmgenet_priv *priv = netdev_priv(dev);
 964
 965         if (!dev->phydev)
 966                 return -ENODEV;
 967
 968         if (!phy_validate_pause(dev->phydev, epause))
 969                 return -EINVAL;
 970
 971         priv->autoneg_pause = !!epause->autoneg;
 972         priv->tx_pause = !!epause->tx_pause;
 973         priv->rx_pause = !!epause->rx_pause;
 974
 975         bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
 976
 977         return 0;
 978 }
 979
 980 /* standard ethtool support functions. */
 981 enum bcmgenet_stat_type {
 982         BCMGENET_STAT_NETDEV = -1,
 983         BCMGENET_STAT_MIB_RX,
 984         BCMGENET_STAT_MIB_TX,
 985         BCMGENET_STAT_RUNT,
 986         BCMGENET_STAT_MISC,
 987         BCMGENET_STAT_SOFT,
 988 };
 989
 990 struct bcmgenet_stats {
 991         char stat_string[ETH_GSTRING_LEN];
 992         int stat_sizeof;
 993         int stat_offset;
 994         enum bcmgenet_stat_type type;
 995         /* reg offset from UMAC base for misc counters */
 996         u16 reg_offset;
 997 };
 998
 999 #define STAT_NETDEV(m) { \
1000         .stat_string = __stringify(m), \
1001         .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \
1002         .stat_offset = offsetof(struct net_device_stats, m), \
1003         .type = BCMGENET_STAT_NETDEV, \
1004 }
1005
1006 #define STAT_GENET_MIB(str, m, _type) { \
1007         .stat_string = str, \
1008         .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
1009         .stat_offset = offsetof(struct bcmgenet_priv, m), \
1010         .type = _type, \
1011 }
1012
1013 #define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX)
1014 #define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX)
1015 #define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT)
1016 #define STAT_GENET_SOFT_MIB(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_SOFT)
1017
1018 #define STAT_GENET_MISC(str, m, offset) { \
1019         .stat_string = str, \
1020         .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
1021         .stat_offset = offsetof(struct bcmgenet_priv, m), \
1022         .type = BCMGENET_STAT_MISC, \
1023         .reg_offset = offset, \
1024 }
1025
1026 #define STAT_GENET_Q(num) \
1027         STAT_GENET_SOFT_MIB("txq" __stringify(num) "_packets", \
1028                         tx_rings[num].packets), \
1029         STAT_GENET_SOFT_MIB("txq" __stringify(num) "_bytes", \
1030                         tx_rings[num].bytes), \
1031         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_bytes", \
1032                         rx_rings[num].bytes),    \
1033         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_packets", \
1034                         rx_rings[num].packets), \
1035         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_errors", \
1036                         rx_rings[num].errors), \
1037         STAT_GENET_SOFT_MIB("rxq" __stringify(num) "_dropped", \
1038                         rx_rings[num].dropped)
1039
1040 /* There is a 0xC gap between the end of RX and beginning of TX stats and then
1041  * between the end of TX stats and the beginning of the RX RUNT
1042  */
1043 #define BCMGENET_STAT_OFFSET    0xc
1044
1045 /* Hardware counters must be kept in sync because the order/offset
1046  * is important here (order in structure declaration = order in hardware)
1047  */
1048 static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
1049         /* general stats */
1050         STAT_NETDEV(rx_packets),
1051         STAT_NETDEV(tx_packets),
1052         STAT_NETDEV(rx_bytes),
1053         STAT_NETDEV(tx_bytes),
1054         STAT_NETDEV(rx_errors),
1055         STAT_NETDEV(tx_errors),
1056         STAT_NETDEV(rx_dropped),
1057         STAT_NETDEV(tx_dropped),
1058         STAT_NETDEV(multicast),
1059         /* UniMAC RSV counters */
1060         STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
1061         STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
1062         STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
1063         STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
1064         STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
1065         STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
1066         STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
1067         STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
1068         STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
1069         STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
1070         STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt),
1071         STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes),
1072         STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca),
1073         STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca),
1074         STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs),
1075         STAT_GENET_MIB_RX("rx_control", mib.rx.cf),
1076         STAT_GENET_MIB_RX("rx_pause", mib.rx.pf),
1077         STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo),
1078         STAT_GENET_MIB_RX("rx_align", mib.rx.aln),
1079         STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr),
1080         STAT_GENET_MIB_RX("rx_code", mib.rx.cde),
1081         STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr),
1082         STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr),
1083         STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr),
1084         STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue),
1085         STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok),
1086         STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc),
1087         STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp),
1088         STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc),
1089         /* UniMAC TSV counters */
1090         STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
1091         STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
1092         STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
1093         STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
1094         STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
1095         STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
1096         STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
1097         STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
1098         STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
1099         STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
1100         STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts),
1101         STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca),
1102         STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca),
1103         STAT_GENET_MIB_TX("tx_pause", mib.tx.pf),
1104         STAT_GENET_MIB_TX("tx_control", mib.tx.cf),
1105         STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs),
1106         STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr),
1107         STAT_GENET_MIB_TX("tx_defer", mib.tx.drf),
1108         STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf),
1109         STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl),
1110         STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl),
1111         STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl),
1112         STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl),
1113         STAT_GENET_MIB_TX("tx_frags", mib.tx.frg),
1114         STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl),
1115         STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr),
1116         STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes),
1117         STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok),
1118         STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc),
1119         /* UniMAC RUNT counters */
1120         STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
1121         STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
1122         STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
1123         STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
1124         /* Misc UniMAC counters */
1125         STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
1126                         UMAC_RBUF_OVFL_CNT_V1),
1127         STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt,
1128                         UMAC_RBUF_ERR_CNT_V1),
1129         STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
1130         STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
1131         STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
1132         STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
1133         STAT_GENET_SOFT_MIB("tx_realloc_tsb", mib.tx_realloc_tsb),
1134         STAT_GENET_SOFT_MIB("tx_realloc_tsb_failed",
1135                             mib.tx_realloc_tsb_failed),
1136         /* Per TX queues */
1137         STAT_GENET_Q(0),
1138         STAT_GENET_Q(1),
1139         STAT_GENET_Q(2),
1140         STAT_GENET_Q(3),
1141         STAT_GENET_Q(16),
1142 };
1143
1144 #define BCMGENET_STATS_LEN      ARRAY_SIZE(bcmgenet_gstrings_stats)
1145
1146 static void bcmgenet_get_drvinfo(struct net_device *dev,
1147                                  struct ethtool_drvinfo *info)
1148 {
1149         strlcpy(info->driver, "bcmgenet", sizeof(info->driver));
1150 }
1151
1152 static int bcmgenet_get_sset_count(struct net_device *dev, int string_set)
1153 {
1154         switch (string_set) {
1155         case ETH_SS_STATS:
1156                 return BCMGENET_STATS_LEN;
1157         default:
1158                 return -EOPNOTSUPP;
1159         }
1160 }
1161
1162 static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
1163                                  u8 *data)
1164 {
1165         int i;
1166
1167         switch (stringset) {
1168         case ETH_SS_STATS:
1169                 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1170                         memcpy(data + i * ETH_GSTRING_LEN,
1171                                bcmgenet_gstrings_stats[i].stat_string,
1172                                ETH_GSTRING_LEN);
1173                 }
1174                 break;
1175         }
1176 }
1177
1178 static u32 bcmgenet_update_stat_misc(struct bcmgenet_priv *priv, u16 offset)
1179 {
1180         u16 new_offset;
1181         u32 val;
1182
1183         switch (offset) {
1184         case UMAC_RBUF_OVFL_CNT_V1:
1185                 if (GENET_IS_V2(priv))
1186                         new_offset = RBUF_OVFL_CNT_V2;
1187                 else
1188                         new_offset = RBUF_OVFL_CNT_V3PLUS;
1189
1190                 val = bcmgenet_rbuf_readl(priv, new_offset);
1191                 /* clear if overflowed */
1192                 if (val == ~0)
1193                         bcmgenet_rbuf_writel(priv, 0, new_offset);
1194                 break;
1195         case UMAC_RBUF_ERR_CNT_V1:
1196                 if (GENET_IS_V2(priv))
1197                         new_offset = RBUF_ERR_CNT_V2;
1198                 else
1199                         new_offset = RBUF_ERR_CNT_V3PLUS;
1200
1201                 val = bcmgenet_rbuf_readl(priv, new_offset);
1202                 /* clear if overflowed */
1203                 if (val == ~0)
1204                         bcmgenet_rbuf_writel(priv, 0, new_offset);
1205                 break;
1206         default:
1207                 val = bcmgenet_umac_readl(priv, offset);
1208                 /* clear if overflowed */
1209                 if (val == ~0)
1210                         bcmgenet_umac_writel(priv, 0, offset);
1211                 break;
1212         }
1213
1214         return val;
1215 }
1216
1217 static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
1218 {
1219         int i, j = 0;
1220
1221         for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1222                 const struct bcmgenet_stats *s;
1223                 u8 offset = 0;
1224                 u32 val = 0;
1225                 char *p;
1226
1227                 s = &bcmgenet_gstrings_stats[i];
1228                 switch (s->type) {
1229                 case BCMGENET_STAT_NETDEV:
1230                 case BCMGENET_STAT_SOFT:
1231                         continue;
1232                 case BCMGENET_STAT_RUNT:
1233                         offset += BCMGENET_STAT_OFFSET;
1234                         fallthrough;
1235                 case BCMGENET_STAT_MIB_TX:
1236                         offset += BCMGENET_STAT_OFFSET;
1237                         fallthrough;
1238                 case BCMGENET_STAT_MIB_RX:
1239                         val = bcmgenet_umac_readl(priv,
1240                                                   UMAC_MIB_START + j + offset);
1241                         offset = 0;     /* Reset Offset */
1242                         break;
1243                 case BCMGENET_STAT_MISC:
1244                         if (GENET_IS_V1(priv)) {
1245                                 val = bcmgenet_umac_readl(priv, s->reg_offset);
1246                                 /* clear if overflowed */
1247                                 if (val == ~0)
1248                                         bcmgenet_umac_writel(priv, 0,
1249                                                              s->reg_offset);
1250                         } else {
1251                                 val = bcmgenet_update_stat_misc(priv,
1252                                                                 s->reg_offset);
1253                         }
1254                         break;
1255                 }
1256
1257                 j += s->stat_sizeof;
1258                 p = (char *)priv + s->stat_offset;
1259                 *(u32 *)p = val;
1260         }
1261 }
1262
1263 static void bcmgenet_get_ethtool_stats(struct net_device *dev,
1264                                        struct ethtool_stats *stats,
1265                                        u64 *data)
1266 {
1267         struct bcmgenet_priv *priv = netdev_priv(dev);
1268         int i;
1269
1270         if (netif_running(dev))
1271                 bcmgenet_update_mib_counters(priv);
1272
1273         dev->netdev_ops->ndo_get_stats(dev);
1274
1275         for (i = 0; i < BCMGENET_STATS_LEN; i++) {
1276                 const struct bcmgenet_stats *s;
1277                 char *p;
1278
1279                 s = &bcmgenet_gstrings_stats[i];
1280                 if (s->type == BCMGENET_STAT_NETDEV)
1281                         p = (char *)&dev->stats;
1282                 else
1283                         p = (char *)priv;
1284                 p += s->stat_offset;
1285                 if (sizeof(unsigned long) != sizeof(u32) &&
1286                     s->stat_sizeof == sizeof(unsigned long))
1287                         data[i] = *(unsigned long *)p;
1288                 else
1289                         data[i] = *(u32 *)p;
1290         }
1291 }
1292
1293 static void bcmgenet_eee_enable_set(struct net_device *dev, bool enable)
1294 {
1295         struct bcmgenet_priv *priv = netdev_priv(dev);
1296         u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
1297         u32 reg;
1298
1299         if (enable && !priv->clk_eee_enabled) {
1300                 clk_prepare_enable(priv->clk_eee);
1301                 priv->clk_eee_enabled = true;
1302         }
1303
1304         reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
1305         if (enable)
1306                 reg |= EEE_EN;
1307         else
1308                 reg &= ~EEE_EN;
1309         bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
1310
1311         /* Enable EEE and switch to a 27Mhz clock automatically */
1312         reg = bcmgenet_readl(priv->base + off);
1313         if (enable)
1314                 reg |= TBUF_EEE_EN | TBUF_PM_EN;
1315         else
1316                 reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
1317         bcmgenet_writel(reg, priv->base + off);
1318
1319         /* Do the same for thing for RBUF */
1320         reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
1321         if (enable)
1322                 reg |= RBUF_EEE_EN | RBUF_PM_EN;
1323         else
1324                 reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
1325         bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
1326
1327         if (!enable && priv->clk_eee_enabled) {
1328                 clk_disable_unprepare(priv->clk_eee);
1329                 priv->clk_eee_enabled = false;
1330         }
1331
1332         priv->eee.eee_enabled = enable;
1333         priv->eee.eee_active = enable;
1334 }
1335
1336 static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e)
1337 {
1338         struct bcmgenet_priv *priv = netdev_priv(dev);
1339         struct ethtool_eee *p = &priv->eee;
1340
1341         if (GENET_IS_V1(priv))
1342                 return -EOPNOTSUPP;
1343
1344         if (!dev->phydev)
1345                 return -ENODEV;
1346
1347         e->eee_enabled = p->eee_enabled;
1348         e->eee_active = p->eee_active;
1349         e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
1350
1351         return phy_ethtool_get_eee(dev->phydev, e);
1352 }
1353
1354 static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
1355 {
1356         struct bcmgenet_priv *priv = netdev_priv(dev);
1357         struct ethtool_eee *p = &priv->eee;
1358         int ret = 0;
1359
1360         if (GENET_IS_V1(priv))
1361                 return -EOPNOTSUPP;
1362
1363         if (!dev->phydev)
1364                 return -ENODEV;
1365
1366         p->eee_enabled = e->eee_enabled;
1367
1368         if (!p->eee_enabled) {
1369                 bcmgenet_eee_enable_set(dev, false);
1370         } else {
1371                 ret = phy_init_eee(dev->phydev, 0);
1372                 if (ret) {
1373                         netif_err(priv, hw, dev, "EEE initialization failed\n");
1374                         return ret;
1375                 }
1376
1377                 bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
1378                 bcmgenet_eee_enable_set(dev, true);
1379         }
1380
1381         return phy_ethtool_set_eee(dev->phydev, e);
1382 }
1383
1384 static int bcmgenet_validate_flow(struct net_device *dev,
1385                                   struct ethtool_rxnfc *cmd)
1386 {
1387         struct ethtool_usrip4_spec *l4_mask;
1388         struct ethhdr *eth_mask;
1389
1390         if (cmd->fs.location >= MAX_NUM_OF_FS_RULES) {
1391                 netdev_err(dev, "rxnfc: Invalid location (%d)\n",
1392                            cmd->fs.location);
1393                 return -EINVAL;
1394         }
1395
1396         switch (cmd->fs.flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
1397         case IP_USER_FLOW:
1398                 l4_mask = &cmd->fs.m_u.usr_ip4_spec;
1399                 /* don't allow mask which isn't valid */
1400                 if (VALIDATE_MASK(l4_mask->ip4src) ||
1401                     VALIDATE_MASK(l4_mask->ip4dst) ||
1402                     VALIDATE_MASK(l4_mask->l4_4_bytes) ||
1403                     VALIDATE_MASK(l4_mask->proto) ||
1404                     VALIDATE_MASK(l4_mask->ip_ver) ||
1405                     VALIDATE_MASK(l4_mask->tos)) {
1406                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1407                         return -EINVAL;
1408                 }
1409                 break;
1410         case ETHER_FLOW:
1411                 eth_mask = &cmd->fs.m_u.ether_spec;
1412                 /* don't allow mask which isn't valid */
1413                 if (VALIDATE_MASK(eth_mask->h_dest) ||
1414                     VALIDATE_MASK(eth_mask->h_source) ||
1415                     VALIDATE_MASK(eth_mask->h_proto)) {
1416                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1417                         return -EINVAL;
1418                 }
1419                 break;
1420         default:
1421                 netdev_err(dev, "rxnfc: Unsupported flow type (0x%x)\n",
1422                            cmd->fs.flow_type);
1423                 return -EINVAL;
1424         }
1425
1426         if ((cmd->fs.flow_type & FLOW_EXT)) {
1427                 /* don't allow mask which isn't valid */
1428                 if (VALIDATE_MASK(cmd->fs.m_ext.vlan_etype) ||
1429                     VALIDATE_MASK(cmd->fs.m_ext.vlan_tci)) {
1430                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1431                         return -EINVAL;
1432                 }
1433                 if (cmd->fs.m_ext.data[0] || cmd->fs.m_ext.data[1]) {
1434                         netdev_err(dev, "rxnfc: user-def not supported\n");
1435                         return -EINVAL;
1436                 }
1437         }
1438
1439         if ((cmd->fs.flow_type & FLOW_MAC_EXT)) {
1440                 /* don't allow mask which isn't valid */
1441                 if (VALIDATE_MASK(cmd->fs.m_ext.h_dest)) {
1442                         netdev_err(dev, "rxnfc: Unsupported mask\n");
1443                         return -EINVAL;
1444                 }
1445         }
1446
1447         return 0;
1448 }
1449
1450 static int bcmgenet_insert_flow(struct net_device *dev,
1451                                 struct ethtool_rxnfc *cmd)
1452 {
1453         struct bcmgenet_priv *priv = netdev_priv(dev);
1454         struct bcmgenet_rxnfc_rule *loc_rule;
1455         int err;
1456
1457         if (priv->hw_params->hfb_filter_size < 128) {
1458                 netdev_err(dev, "rxnfc: Not supported by this device\n");
1459                 return -EINVAL;
1460         }
1461
1462         if (cmd->fs.ring_cookie > priv->hw_params->rx_queues &&
1463             cmd->fs.ring_cookie != RX_CLS_FLOW_WAKE) {
1464                 netdev_err(dev, "rxnfc: Unsupported action (%llu)\n",
1465                            cmd->fs.ring_cookie);
1466                 return -EINVAL;
1467         }
1468
1469         err = bcmgenet_validate_flow(dev, cmd);
1470         if (err)
1471                 return err;
1472
1473         loc_rule = &priv->rxnfc_rules[cmd->fs.location];
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;
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 netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
2039 {
2040         struct bcmgenet_priv *priv = netdev_priv(dev);
2041         struct device *kdev = &priv->pdev->dev;
2042         struct bcmgenet_tx_ring *ring = NULL;
2043         struct enet_cb *tx_cb_ptr;
2044         struct netdev_queue *txq;
2045         int nr_frags, index;
2046         dma_addr_t mapping;
2047         unsigned int size;
2048         skb_frag_t *frag;
2049         u32 len_stat;
2050         int ret;
2051         int i;
2052
2053         index = skb_get_queue_mapping(skb);
2054         /* Mapping strategy:
2055          * queue_mapping = 0, unclassified, packet xmited through ring16
2056          * queue_mapping = 1, goes to ring 0. (highest priority queue
2057          * queue_mapping = 2, goes to ring 1.
2058          * queue_mapping = 3, goes to ring 2.
2059          * queue_mapping = 4, goes to ring 3.
2060          */
2061         if (index == 0)
2062                 index = DESC_INDEX;
2063         else
2064                 index -= 1;
2065
2066         ring = &priv->tx_rings[index];
2067         txq = netdev_get_tx_queue(dev, ring->queue);
2068
2069         nr_frags = skb_shinfo(skb)->nr_frags;
2070
2071         spin_lock(&ring->lock);
2072         if (ring->free_bds <= (nr_frags + 1)) {
2073                 if (!netif_tx_queue_stopped(txq)) {
2074                         netif_tx_stop_queue(txq);
2075                         netdev_err(dev,
2076                                    "%s: tx ring %d full when queue %d awake\n",
2077                                    __func__, index, ring->queue);
2078                 }
2079                 ret = NETDEV_TX_BUSY;
2080                 goto out;
2081         }
2082
2083         /* Retain how many bytes will be sent on the wire, without TSB inserted
2084          * by transmit checksum offload
2085          */
2086         GENET_CB(skb)->bytes_sent = skb->len;
2087
2088         /* add the Transmit Status Block */
2089         skb = bcmgenet_add_tsb(dev, skb);
2090         if (!skb) {
2091                 ret = NETDEV_TX_OK;
2092                 goto out;
2093         }
2094
2095         for (i = 0; i <= nr_frags; i++) {
2096                 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
2097
2098                 BUG_ON(!tx_cb_ptr);
2099
2100                 if (!i) {
2101                         /* Transmit single SKB or head of fragment list */
2102                         GENET_CB(skb)->first_cb = tx_cb_ptr;
2103                         size = skb_headlen(skb);
2104                         mapping = dma_map_single(kdev, skb->data, size,
2105                                                  DMA_TO_DEVICE);
2106                 } else {
2107                         /* xmit fragment */
2108                         frag = &skb_shinfo(skb)->frags[i - 1];
2109                         size = skb_frag_size(frag);
2110                         mapping = skb_frag_dma_map(kdev, frag, 0, size,
2111                                                    DMA_TO_DEVICE);
2112                 }
2113
2114                 ret = dma_mapping_error(kdev, mapping);
2115                 if (ret) {
2116                         priv->mib.tx_dma_failed++;
2117                         netif_err(priv, tx_err, dev, "Tx DMA map failed\n");
2118                         ret = NETDEV_TX_OK;
2119                         goto out_unmap_frags;
2120                 }
2121                 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
2122                 dma_unmap_len_set(tx_cb_ptr, dma_len, size);
2123
2124                 tx_cb_ptr->skb = skb;
2125
2126                 len_stat = (size << DMA_BUFLENGTH_SHIFT) |
2127                            (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT);
2128
2129                 /* Note: if we ever change from DMA_TX_APPEND_CRC below we
2130                  * will need to restore software padding of "runt" packets
2131                  */
2132                 if (!i) {
2133                         len_stat |= DMA_TX_APPEND_CRC | DMA_SOP;
2134                         if (skb->ip_summed == CHECKSUM_PARTIAL)
2135                                 len_stat |= DMA_TX_DO_CSUM;
2136                 }
2137                 if (i == nr_frags)
2138                         len_stat |= DMA_EOP;
2139
2140                 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, len_stat);
2141         }
2142
2143         GENET_CB(skb)->last_cb = tx_cb_ptr;
2144         skb_tx_timestamp(skb);
2145
2146         /* Decrement total BD count and advance our write pointer */
2147         ring->free_bds -= nr_frags + 1;
2148         ring->prod_index += nr_frags + 1;
2149         ring->prod_index &= DMA_P_INDEX_MASK;
2150
2151         netdev_tx_sent_queue(txq, GENET_CB(skb)->bytes_sent);
2152
2153         if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
2154                 netif_tx_stop_queue(txq);
2155
2156         if (!netdev_xmit_more() || netif_xmit_stopped(txq))
2157                 /* Packets are ready, update producer index */
2158                 bcmgenet_tdma_ring_writel(priv, ring->index,
2159                                           ring->prod_index, TDMA_PROD_INDEX);
2160 out:
2161         spin_unlock(&ring->lock);
2162
2163         return ret;
2164
2165 out_unmap_frags:
2166         /* Back up for failed control block mapping */
2167         bcmgenet_put_txcb(priv, ring);
2168
2169         /* Unmap successfully mapped control blocks */
2170         while (i-- > 0) {
2171                 tx_cb_ptr = bcmgenet_put_txcb(priv, ring);
2172                 bcmgenet_free_tx_cb(kdev, tx_cb_ptr);
2173         }
2174
2175         dev_kfree_skb(skb);
2176         goto out;
2177 }
2178
2179 static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
2180                                           struct enet_cb *cb)
2181 {
2182         struct device *kdev = &priv->pdev->dev;
2183         struct sk_buff *skb;
2184         struct sk_buff *rx_skb;
2185         dma_addr_t mapping;
2186
2187         /* Allocate a new Rx skb */
2188         skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT,
2189                                  GFP_ATOMIC | __GFP_NOWARN);
2190         if (!skb) {
2191                 priv->mib.alloc_rx_buff_failed++;
2192                 netif_err(priv, rx_err, priv->dev,
2193                           "%s: Rx skb allocation failed\n", __func__);
2194                 return NULL;
2195         }
2196
2197         /* DMA-map the new Rx skb */
2198         mapping = dma_map_single(kdev, skb->data, priv->rx_buf_len,
2199                                  DMA_FROM_DEVICE);
2200         if (dma_mapping_error(kdev, mapping)) {
2201                 priv->mib.rx_dma_failed++;
2202                 dev_kfree_skb_any(skb);
2203                 netif_err(priv, rx_err, priv->dev,
2204                           "%s: Rx skb DMA mapping failed\n", __func__);
2205                 return NULL;
2206         }
2207
2208         /* Grab the current Rx skb from the ring and DMA-unmap it */
2209         rx_skb = bcmgenet_free_rx_cb(kdev, cb);
2210
2211         /* Put the new Rx skb on the ring */
2212         cb->skb = skb;
2213         dma_unmap_addr_set(cb, dma_addr, mapping);
2214         dma_unmap_len_set(cb, dma_len, priv->rx_buf_len);
2215         dmadesc_set_addr(priv, cb->bd_addr, mapping);
2216
2217         /* Return the current Rx skb to caller */
2218         return rx_skb;
2219 }
2220
2221 /* bcmgenet_desc_rx - descriptor based rx process.
2222  * this could be called from bottom half, or from NAPI polling method.
2223  */
2224 static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
2225                                      unsigned int budget)
2226 {
2227         struct bcmgenet_priv *priv = ring->priv;
2228         struct net_device *dev = priv->dev;
2229         struct enet_cb *cb;
2230         struct sk_buff *skb;
2231         u32 dma_length_status;
2232         unsigned long dma_flag;
2233         int len;
2234         unsigned int rxpktprocessed = 0, rxpkttoprocess;
2235         unsigned int bytes_processed = 0;
2236         unsigned int p_index, mask;
2237         unsigned int discards;
2238
2239         /* Clear status before servicing to reduce spurious interrupts */
2240         if (ring->index == DESC_INDEX) {
2241                 bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_DONE,
2242                                          INTRL2_CPU_CLEAR);
2243         } else {
2244                 mask = 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index);
2245                 bcmgenet_intrl2_1_writel(priv,
2246                                          mask,
2247                                          INTRL2_CPU_CLEAR);
2248         }
2249
2250         p_index = bcmgenet_rdma_ring_readl(priv, ring->index, RDMA_PROD_INDEX);
2251
2252         discards = (p_index >> DMA_P_INDEX_DISCARD_CNT_SHIFT) &
2253                    DMA_P_INDEX_DISCARD_CNT_MASK;
2254         if (discards > ring->old_discards) {
2255                 discards = discards - ring->old_discards;
2256                 ring->errors += discards;
2257                 ring->old_discards += discards;
2258
2259                 /* Clear HW register when we reach 75% of maximum 0xFFFF */
2260                 if (ring->old_discards >= 0xC000) {
2261                         ring->old_discards = 0;
2262                         bcmgenet_rdma_ring_writel(priv, ring->index, 0,
2263                                                   RDMA_PROD_INDEX);
2264                 }
2265         }
2266
2267         p_index &= DMA_P_INDEX_MASK;
2268         rxpkttoprocess = (p_index - ring->c_index) & DMA_C_INDEX_MASK;
2269
2270         netif_dbg(priv, rx_status, dev,
2271                   "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
2272
2273         while ((rxpktprocessed < rxpkttoprocess) &&
2274                (rxpktprocessed < budget)) {
2275                 struct status_64 *status;
2276                 __be16 rx_csum;
2277
2278                 cb = &priv->rx_cbs[ring->read_ptr];
2279                 skb = bcmgenet_rx_refill(priv, cb);
2280
2281                 if (unlikely(!skb)) {
2282                         ring->dropped++;
2283                         goto next;
2284                 }
2285
2286                 status = (struct status_64 *)skb->data;
2287                 dma_length_status = status->length_status;
2288                 if (dev->features & NETIF_F_RXCSUM) {
2289                         rx_csum = (__force __be16)(status->rx_csum & 0xffff);
2290                         skb->csum = (__force __wsum)ntohs(rx_csum);
2291                         skb->ip_summed = CHECKSUM_COMPLETE;
2292                 }
2293
2294                 /* DMA flags and length are still valid no matter how
2295                  * we got the Receive Status Vector (64B RSB or register)
2296                  */
2297                 dma_flag = dma_length_status & 0xffff;
2298                 len = dma_length_status >> DMA_BUFLENGTH_SHIFT;
2299
2300                 netif_dbg(priv, rx_status, dev,
2301                           "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n",
2302                           __func__, p_index, ring->c_index,
2303                           ring->read_ptr, dma_length_status);
2304
2305                 if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
2306                         netif_err(priv, rx_status, dev,
2307                                   "dropping fragmented packet!\n");
2308                         ring->errors++;
2309                         dev_kfree_skb_any(skb);
2310                         goto next;
2311                 }
2312
2313                 /* report errors */
2314                 if (unlikely(dma_flag & (DMA_RX_CRC_ERROR |
2315                                                 DMA_RX_OV |
2316                                                 DMA_RX_NO |
2317                                                 DMA_RX_LG |
2318                                                 DMA_RX_RXER))) {
2319                         netif_err(priv, rx_status, dev, "dma_flag=0x%x\n",
2320                                   (unsigned int)dma_flag);
2321                         if (dma_flag & DMA_RX_CRC_ERROR)
2322                                 dev->stats.rx_crc_errors++;
2323                         if (dma_flag & DMA_RX_OV)
2324                                 dev->stats.rx_over_errors++;
2325                         if (dma_flag & DMA_RX_NO)
2326                                 dev->stats.rx_frame_errors++;
2327                         if (dma_flag & DMA_RX_LG)
2328                                 dev->stats.rx_length_errors++;
2329                         dev->stats.rx_errors++;
2330                         dev_kfree_skb_any(skb);
2331                         goto next;
2332                 } /* error packet */
2333
2334                 skb_put(skb, len);
2335
2336                 /* remove RSB and hardware 2bytes added for IP alignment */
2337                 skb_pull(skb, 66);
2338                 len -= 66;
2339
2340                 if (priv->crc_fwd_en) {
2341                         skb_trim(skb, len - ETH_FCS_LEN);
2342                         len -= ETH_FCS_LEN;
2343                 }
2344
2345                 bytes_processed += len;
2346
2347                 /*Finish setting up the received SKB and send it to the kernel*/
2348                 skb->protocol = eth_type_trans(skb, priv->dev);
2349                 ring->packets++;
2350                 ring->bytes += len;
2351                 if (dma_flag & DMA_RX_MULT)
2352                         dev->stats.multicast++;
2353
2354                 /* Notify kernel */
2355                 napi_gro_receive(&ring->napi, skb);
2356                 netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
2357
2358 next:
2359                 rxpktprocessed++;
2360                 if (likely(ring->read_ptr < ring->end_ptr))
2361                         ring->read_ptr++;
2362                 else
2363                         ring->read_ptr = ring->cb_ptr;
2364
2365                 ring->c_index = (ring->c_index + 1) & DMA_C_INDEX_MASK;
2366                 bcmgenet_rdma_ring_writel(priv, ring->index, ring->c_index, RDMA_CONS_INDEX);
2367         }
2368
2369         ring->dim.bytes = bytes_processed;
2370         ring->dim.packets = rxpktprocessed;
2371
2372         return rxpktprocessed;
2373 }
2374
2375 /* Rx NAPI polling method */
2376 static int bcmgenet_rx_poll(struct napi_struct *napi, int budget)
2377 {
2378         struct bcmgenet_rx_ring *ring = container_of(napi,
2379                         struct bcmgenet_rx_ring, napi);
2380         struct dim_sample dim_sample = {};
2381         unsigned int work_done;
2382
2383         work_done = bcmgenet_desc_rx(ring, budget);
2384
2385         if (work_done < budget) {
2386                 napi_complete_done(napi, work_done);
2387                 ring->int_enable(ring);
2388         }
2389
2390         if (ring->dim.use_dim) {
2391                 dim_update_sample(ring->dim.event_ctr, ring->dim.packets,
2392                                   ring->dim.bytes, &dim_sample);
2393                 net_dim(&ring->dim.dim, dim_sample);
2394         }
2395
2396         return work_done;
2397 }
2398
2399 static void bcmgenet_dim_work(struct work_struct *work)
2400 {
2401         struct dim *dim = container_of(work, struct dim, work);
2402         struct bcmgenet_net_dim *ndim =
2403                         container_of(dim, struct bcmgenet_net_dim, dim);
2404         struct bcmgenet_rx_ring *ring =
2405                         container_of(ndim, struct bcmgenet_rx_ring, dim);
2406         struct dim_cq_moder cur_profile =
2407                         net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
2408
2409         bcmgenet_set_rx_coalesce(ring, cur_profile.usec, cur_profile.pkts);
2410         dim->state = DIM_START_MEASURE;
2411 }
2412
2413 /* Assign skb to RX DMA descriptor. */
2414 static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
2415                                      struct bcmgenet_rx_ring *ring)
2416 {
2417         struct enet_cb *cb;
2418         struct sk_buff *skb;
2419         int i;
2420
2421         netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
2422
2423         /* loop here for each buffer needing assign */
2424         for (i = 0; i < ring->size; i++) {
2425                 cb = ring->cbs + i;
2426                 skb = bcmgenet_rx_refill(priv, cb);
2427                 if (skb)
2428                         dev_consume_skb_any(skb);
2429                 if (!cb->skb)
2430                         return -ENOMEM;
2431         }
2432
2433         return 0;
2434 }
2435
2436 static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
2437 {
2438         struct sk_buff *skb;
2439         struct enet_cb *cb;
2440         int i;
2441
2442         for (i = 0; i < priv->num_rx_bds; i++) {
2443                 cb = &priv->rx_cbs[i];
2444
2445                 skb = bcmgenet_free_rx_cb(&priv->pdev->dev, cb);
2446                 if (skb)
2447                         dev_consume_skb_any(skb);
2448         }
2449 }
2450
2451 static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable)
2452 {
2453         u32 reg;
2454
2455         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
2456         if (reg & CMD_SW_RESET)
2457                 return;
2458         if (enable)
2459                 reg |= mask;
2460         else
2461                 reg &= ~mask;
2462         bcmgenet_umac_writel(priv, reg, UMAC_CMD);
2463
2464         /* UniMAC stops on a packet boundary, wait for a full-size packet
2465          * to be processed
2466          */
2467         if (enable == 0)
2468                 usleep_range(1000, 2000);
2469 }
2470
2471 static void reset_umac(struct bcmgenet_priv *priv)
2472 {
2473         /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */
2474         bcmgenet_rbuf_ctrl_set(priv, 0);
2475         udelay(10);
2476
2477         /* issue soft reset and disable MAC while updating its registers */
2478         bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD);
2479         udelay(2);
2480 }
2481
2482 static void bcmgenet_intr_disable(struct bcmgenet_priv *priv)
2483 {
2484         /* Mask all interrupts.*/
2485         bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
2486         bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
2487         bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
2488         bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
2489 }
2490
2491 static void bcmgenet_link_intr_enable(struct bcmgenet_priv *priv)
2492 {
2493         u32 int0_enable = 0;
2494
2495         /* Monitor cable plug/unplugged event for internal PHY, external PHY
2496          * and MoCA PHY
2497          */
2498         if (priv->internal_phy) {
2499                 int0_enable |= UMAC_IRQ_LINK_EVENT;
2500                 if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv))
2501                         int0_enable |= UMAC_IRQ_PHY_DET_R;
2502         } else if (priv->ext_phy) {
2503                 int0_enable |= UMAC_IRQ_LINK_EVENT;
2504         } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
2505                 if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)
2506                         int0_enable |= UMAC_IRQ_LINK_EVENT;
2507         }
2508         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
2509 }
2510
2511 static void init_umac(struct bcmgenet_priv *priv)
2512 {
2513         struct device *kdev = &priv->pdev->dev;
2514         u32 reg;
2515         u32 int0_enable = 0;
2516
2517         dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n");
2518
2519         reset_umac(priv);
2520
2521         /* clear tx/rx counter */
2522         bcmgenet_umac_writel(priv,
2523                              MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT,
2524                              UMAC_MIB_CTRL);
2525         bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL);
2526
2527         bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2528
2529         /* init tx registers, enable TSB */
2530         reg = bcmgenet_tbuf_ctrl_get(priv);
2531         reg |= TBUF_64B_EN;
2532         bcmgenet_tbuf_ctrl_set(priv, reg);
2533
2534         /* init rx registers, enable ip header optimization and RSB */
2535         reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
2536         reg |= RBUF_ALIGN_2B | RBUF_64B_EN;
2537         bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL);
2538
2539         /* enable rx checksumming */
2540         reg = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
2541         reg |= RBUF_RXCHK_EN | RBUF_L3_PARSE_DIS;
2542         /* If UniMAC forwards CRC, we need to skip over it to get
2543          * a valid CHK bit to be set in the per-packet status word
2544          */
2545         if (priv->crc_fwd_en)
2546                 reg |= RBUF_SKIP_FCS;
2547         else
2548                 reg &= ~RBUF_SKIP_FCS;
2549         bcmgenet_rbuf_writel(priv, reg, RBUF_CHK_CTRL);
2550
2551         if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv))
2552                 bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL);
2553
2554         bcmgenet_intr_disable(priv);
2555
2556         /* Configure backpressure vectors for MoCA */
2557         if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
2558                 reg = bcmgenet_bp_mc_get(priv);
2559                 reg |= BIT(priv->hw_params->bp_in_en_shift);
2560
2561                 /* bp_mask: back pressure mask */
2562                 if (netif_is_multiqueue(priv->dev))
2563                         reg |= priv->hw_params->bp_in_mask;
2564                 else
2565                         reg &= ~priv->hw_params->bp_in_mask;
2566                 bcmgenet_bp_mc_set(priv, reg);
2567         }
2568
2569         /* Enable MDIO interrupts on GENET v3+ */
2570         if (priv->hw_params->flags & GENET_HAS_MDIO_INTR)
2571                 int0_enable |= (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
2572
2573         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
2574
2575         dev_dbg(kdev, "done init umac\n");
2576 }
2577
2578 static void bcmgenet_init_dim(struct bcmgenet_rx_ring *ring,
2579                               void (*cb)(struct work_struct *work))
2580 {
2581         struct bcmgenet_net_dim *dim = &ring->dim;
2582
2583         INIT_WORK(&dim->dim.work, cb);
2584         dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
2585         dim->event_ctr = 0;
2586         dim->packets = 0;
2587         dim->bytes = 0;
2588 }
2589
2590 static void bcmgenet_init_rx_coalesce(struct bcmgenet_rx_ring *ring)
2591 {
2592         struct bcmgenet_net_dim *dim = &ring->dim;
2593         struct dim_cq_moder moder;
2594         u32 usecs, pkts;
2595
2596         usecs = ring->rx_coalesce_usecs;
2597         pkts = ring->rx_max_coalesced_frames;
2598
2599         /* If DIM was enabled, re-apply default parameters */
2600         if (dim->use_dim) {
2601                 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
2602                 usecs = moder.usec;
2603                 pkts = moder.pkts;
2604         }
2605
2606         bcmgenet_set_rx_coalesce(ring, usecs, pkts);
2607 }
2608
2609 /* Initialize a Tx ring along with corresponding hardware registers */
2610 static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv,
2611                                   unsigned int index, unsigned int size,
2612                                   unsigned int start_ptr, unsigned int end_ptr)
2613 {
2614         struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
2615         u32 words_per_bd = WORDS_PER_BD(priv);
2616         u32 flow_period_val = 0;
2617
2618         spin_lock_init(&ring->lock);
2619         ring->priv = priv;
2620         ring->index = index;
2621         if (index == DESC_INDEX) {
2622                 ring->queue = 0;
2623                 ring->int_enable = bcmgenet_tx_ring16_int_enable;
2624                 ring->int_disable = bcmgenet_tx_ring16_int_disable;
2625         } else {
2626                 ring->queue = index + 1;
2627                 ring->int_enable = bcmgenet_tx_ring_int_enable;
2628                 ring->int_disable = bcmgenet_tx_ring_int_disable;
2629         }
2630         ring->cbs = priv->tx_cbs + start_ptr;
2631         ring->size = size;
2632         ring->clean_ptr = start_ptr;
2633         ring->c_index = 0;
2634         ring->free_bds = size;
2635         ring->write_ptr = start_ptr;
2636         ring->cb_ptr = start_ptr;
2637         ring->end_ptr = end_ptr - 1;
2638         ring->prod_index = 0;
2639
2640         /* Set flow period for ring != 16 */
2641         if (index != DESC_INDEX)
2642                 flow_period_val = ENET_MAX_MTU_SIZE << 16;
2643
2644         bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX);
2645         bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX);
2646         bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
2647         /* Disable rate control for now */
2648         bcmgenet_tdma_ring_writel(priv, index, flow_period_val,
2649                                   TDMA_FLOW_PERIOD);
2650         bcmgenet_tdma_ring_writel(priv, index,
2651                                   ((size << DMA_RING_SIZE_SHIFT) |
2652                                    RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
2653
2654         /* Set start and end address, read and write pointers */
2655         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2656                                   DMA_START_ADDR);
2657         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2658                                   TDMA_READ_PTR);
2659         bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
2660                                   TDMA_WRITE_PTR);
2661         bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
2662                                   DMA_END_ADDR);
2663
2664         /* Initialize Tx NAPI */
2665         netif_tx_napi_add(priv->dev, &ring->napi, bcmgenet_tx_poll,
2666                           NAPI_POLL_WEIGHT);
2667 }
2668
2669 /* Initialize a RDMA ring */
2670 static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
2671                                  unsigned int index, unsigned int size,
2672                                  unsigned int start_ptr, unsigned int end_ptr)
2673 {
2674         struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
2675         u32 words_per_bd = WORDS_PER_BD(priv);
2676         int ret;
2677
2678         ring->priv = priv;
2679         ring->index = index;
2680         if (index == DESC_INDEX) {
2681                 ring->int_enable = bcmgenet_rx_ring16_int_enable;
2682                 ring->int_disable = bcmgenet_rx_ring16_int_disable;
2683         } else {
2684                 ring->int_enable = bcmgenet_rx_ring_int_enable;
2685                 ring->int_disable = bcmgenet_rx_ring_int_disable;
2686         }
2687         ring->cbs = priv->rx_cbs + start_ptr;
2688         ring->size = size;
2689         ring->c_index = 0;
2690         ring->read_ptr = start_ptr;
2691         ring->cb_ptr = start_ptr;
2692         ring->end_ptr = end_ptr - 1;
2693
2694         ret = bcmgenet_alloc_rx_buffers(priv, ring);
2695         if (ret)
2696                 return ret;
2697
2698         bcmgenet_init_dim(ring, bcmgenet_dim_work);
2699         bcmgenet_init_rx_coalesce(ring);
2700
2701         /* Initialize Rx NAPI */
2702         netif_napi_add(priv->dev, &ring->napi, bcmgenet_rx_poll,
2703                        NAPI_POLL_WEIGHT);
2704
2705         bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX);
2706         bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX);
2707         bcmgenet_rdma_ring_writel(priv, index,
2708                                   ((size << DMA_RING_SIZE_SHIFT) |
2709                                    RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
2710         bcmgenet_rdma_ring_writel(priv, index,
2711                                   (DMA_FC_THRESH_LO <<
2712                                    DMA_XOFF_THRESHOLD_SHIFT) |
2713                                    DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
2714
2715         /* Set start and end address, read and write pointers */
2716         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2717                                   DMA_START_ADDR);
2718         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2719                                   RDMA_READ_PTR);
2720         bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2721                                   RDMA_WRITE_PTR);
2722         bcmgenet_rdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
2723                                   DMA_END_ADDR);
2724
2725         return ret;
2726 }
2727
2728 static void bcmgenet_enable_tx_napi(struct bcmgenet_priv *priv)
2729 {
2730         unsigned int i;
2731         struct bcmgenet_tx_ring *ring;
2732
2733         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2734                 ring = &priv->tx_rings[i];
2735                 napi_enable(&ring->napi);
2736                 ring->int_enable(ring);
2737         }
2738
2739         ring = &priv->tx_rings[DESC_INDEX];
2740         napi_enable(&ring->napi);
2741         ring->int_enable(ring);
2742 }
2743
2744 static void bcmgenet_disable_tx_napi(struct bcmgenet_priv *priv)
2745 {
2746         unsigned int i;
2747         struct bcmgenet_tx_ring *ring;
2748
2749         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2750                 ring = &priv->tx_rings[i];
2751                 napi_disable(&ring->napi);
2752         }
2753
2754         ring = &priv->tx_rings[DESC_INDEX];
2755         napi_disable(&ring->napi);
2756 }
2757
2758 static void bcmgenet_fini_tx_napi(struct bcmgenet_priv *priv)
2759 {
2760         unsigned int i;
2761         struct bcmgenet_tx_ring *ring;
2762
2763         for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2764                 ring = &priv->tx_rings[i];
2765                 netif_napi_del(&ring->napi);
2766         }
2767
2768         ring = &priv->tx_rings[DESC_INDEX];
2769         netif_napi_del(&ring->napi);
2770 }
2771
2772 /* Initialize Tx queues
2773  *
2774  * Queues 0-3 are priority-based, each one has 32 descriptors,
2775  * with queue 0 being the highest priority queue.
2776  *
2777  * Queue 16 is the default Tx queue with
2778  * GENET_Q16_TX_BD_CNT = 256 - 4 * 32 = 128 descriptors.
2779  *
2780  * The transmit control block pool is then partitioned as follows:
2781  * - Tx queue 0 uses tx_cbs[0..31]
2782  * - Tx queue 1 uses tx_cbs[32..63]
2783  * - Tx queue 2 uses tx_cbs[64..95]
2784  * - Tx queue 3 uses tx_cbs[96..127]
2785  * - Tx queue 16 uses tx_cbs[128..255]
2786  */
2787 static void bcmgenet_init_tx_queues(struct net_device *dev)
2788 {
2789         struct bcmgenet_priv *priv = netdev_priv(dev);
2790         u32 i, dma_enable;
2791         u32 dma_ctrl, ring_cfg;
2792         u32 dma_priority[3] = {0, 0, 0};
2793
2794         dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL);
2795         dma_enable = dma_ctrl & DMA_EN;
2796         dma_ctrl &= ~DMA_EN;
2797         bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2798
2799         dma_ctrl = 0;
2800         ring_cfg = 0;
2801
2802         /* Enable strict priority arbiter mode */
2803         bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
2804
2805         /* Initialize Tx priority queues */
2806         for (i = 0; i < priv->hw_params->tx_queues; i++) {
2807                 bcmgenet_init_tx_ring(priv, i, priv->hw_params->tx_bds_per_q,
2808                                       i * priv->hw_params->tx_bds_per_q,
2809                                       (i + 1) * priv->hw_params->tx_bds_per_q);
2810                 ring_cfg |= (1 << i);
2811                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2812                 dma_priority[DMA_PRIO_REG_INDEX(i)] |=
2813                         ((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
2814         }
2815
2816         /* Initialize Tx default queue 16 */
2817         bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_Q16_TX_BD_CNT,
2818                               priv->hw_params->tx_queues *
2819                               priv->hw_params->tx_bds_per_q,
2820                               TOTAL_DESC);
2821         ring_cfg |= (1 << DESC_INDEX);
2822         dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2823         dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
2824                 ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
2825                  DMA_PRIO_REG_SHIFT(DESC_INDEX));
2826
2827         /* Set Tx queue priorities */
2828         bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
2829         bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
2830         bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
2831
2832         /* Enable Tx queues */
2833         bcmgenet_tdma_writel(priv, ring_cfg, DMA_RING_CFG);
2834
2835         /* Enable Tx DMA */
2836         if (dma_enable)
2837                 dma_ctrl |= DMA_EN;
2838         bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2839 }
2840
2841 static void bcmgenet_enable_rx_napi(struct bcmgenet_priv *priv)
2842 {
2843         unsigned int i;
2844         struct bcmgenet_rx_ring *ring;
2845
2846         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2847                 ring = &priv->rx_rings[i];
2848                 napi_enable(&ring->napi);
2849                 ring->int_enable(ring);
2850         }
2851
2852         ring = &priv->rx_rings[DESC_INDEX];
2853         napi_enable(&ring->napi);
2854         ring->int_enable(ring);
2855 }
2856
2857 static void bcmgenet_disable_rx_napi(struct bcmgenet_priv *priv)
2858 {
2859         unsigned int i;
2860         struct bcmgenet_rx_ring *ring;
2861
2862         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2863                 ring = &priv->rx_rings[i];
2864                 napi_disable(&ring->napi);
2865                 cancel_work_sync(&ring->dim.dim.work);
2866         }
2867
2868         ring = &priv->rx_rings[DESC_INDEX];
2869         napi_disable(&ring->napi);
2870         cancel_work_sync(&ring->dim.dim.work);
2871 }
2872
2873 static void bcmgenet_fini_rx_napi(struct bcmgenet_priv *priv)
2874 {
2875         unsigned int i;
2876         struct bcmgenet_rx_ring *ring;
2877
2878         for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2879                 ring = &priv->rx_rings[i];
2880                 netif_napi_del(&ring->napi);
2881         }
2882
2883         ring = &priv->rx_rings[DESC_INDEX];
2884         netif_napi_del(&ring->napi);
2885 }
2886
2887 /* Initialize Rx queues
2888  *
2889  * Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
2890  * used to direct traffic to these queues.
2891  *
2892  * Queue 16 is the default Rx queue with GENET_Q16_RX_BD_CNT descriptors.
2893  */
2894 static int bcmgenet_init_rx_queues(struct net_device *dev)
2895 {
2896         struct bcmgenet_priv *priv = netdev_priv(dev);
2897         u32 i;
2898         u32 dma_enable;
2899         u32 dma_ctrl;
2900         u32 ring_cfg;
2901         int ret;
2902
2903         dma_ctrl = bcmgenet_rdma_readl(priv, DMA_CTRL);
2904         dma_enable = dma_ctrl & DMA_EN;
2905         dma_ctrl &= ~DMA_EN;
2906         bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2907
2908         dma_ctrl = 0;
2909         ring_cfg = 0;
2910
2911         /* Initialize Rx priority queues */
2912         for (i = 0; i < priv->hw_params->rx_queues; i++) {
2913                 ret = bcmgenet_init_rx_ring(priv, i,
2914                                             priv->hw_params->rx_bds_per_q,
2915                                             i * priv->hw_params->rx_bds_per_q,
2916                                             (i + 1) *
2917                                             priv->hw_params->rx_bds_per_q);
2918                 if (ret)
2919                         return ret;
2920
2921                 ring_cfg |= (1 << i);
2922                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2923         }
2924
2925         /* Initialize Rx default queue 16 */
2926         ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, GENET_Q16_RX_BD_CNT,
2927                                     priv->hw_params->rx_queues *
2928                                     priv->hw_params->rx_bds_per_q,
2929                                     TOTAL_DESC);
2930         if (ret)
2931                 return ret;
2932
2933         ring_cfg |= (1 << DESC_INDEX);
2934         dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2935
2936         /* Enable rings */
2937         bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
2938
2939         /* Configure ring as descriptor ring and re-enable DMA if enabled */
2940         if (dma_enable)
2941                 dma_ctrl |= DMA_EN;
2942         bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2943
2944         return 0;
2945 }
2946
2947 static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
2948 {
2949         int ret = 0;
2950         int timeout = 0;
2951         u32 reg;
2952         u32 dma_ctrl;
2953         int i;
2954
2955         /* Disable TDMA to stop add more frames in TX DMA */
2956         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2957         reg &= ~DMA_EN;
2958         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2959
2960         /* Check TDMA status register to confirm TDMA is disabled */
2961         while (timeout++ < DMA_TIMEOUT_VAL) {
2962                 reg = bcmgenet_tdma_readl(priv, DMA_STATUS);
2963                 if (reg & DMA_DISABLED)
2964                         break;
2965
2966                 udelay(1);
2967         }
2968
2969         if (timeout == DMA_TIMEOUT_VAL) {
2970                 netdev_warn(priv->dev, "Timed out while disabling TX DMA\n");
2971                 ret = -ETIMEDOUT;
2972         }
2973
2974         /* Wait 10ms for packet drain in both tx and rx dma */
2975         usleep_range(10000, 20000);
2976
2977         /* Disable RDMA */
2978         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2979         reg &= ~DMA_EN;
2980         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2981
2982         timeout = 0;
2983         /* Check RDMA status register to confirm RDMA is disabled */
2984         while (timeout++ < DMA_TIMEOUT_VAL) {
2985                 reg = bcmgenet_rdma_readl(priv, DMA_STATUS);
2986                 if (reg & DMA_DISABLED)
2987                         break;
2988
2989                 udelay(1);
2990         }
2991
2992         if (timeout == DMA_TIMEOUT_VAL) {
2993                 netdev_warn(priv->dev, "Timed out while disabling RX DMA\n");
2994                 ret = -ETIMEDOUT;
2995         }
2996
2997         dma_ctrl = 0;
2998         for (i = 0; i < priv->hw_params->rx_queues; i++)
2999                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3000         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3001         reg &= ~dma_ctrl;
3002         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3003
3004         dma_ctrl = 0;
3005         for (i = 0; i < priv->hw_params->tx_queues; i++)
3006                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3007         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3008         reg &= ~dma_ctrl;
3009         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3010
3011         return ret;
3012 }
3013
3014 static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
3015 {
3016         struct netdev_queue *txq;
3017         int i;
3018
3019         bcmgenet_fini_rx_napi(priv);
3020         bcmgenet_fini_tx_napi(priv);
3021
3022         for (i = 0; i < priv->num_tx_bds; i++)
3023                 dev_kfree_skb(bcmgenet_free_tx_cb(&priv->pdev->dev,
3024                                                   priv->tx_cbs + i));
3025
3026         for (i = 0; i < priv->hw_params->tx_queues; i++) {
3027                 txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[i].queue);
3028                 netdev_tx_reset_queue(txq);
3029         }
3030
3031         txq = netdev_get_tx_queue(priv->dev, priv->tx_rings[DESC_INDEX].queue);
3032         netdev_tx_reset_queue(txq);
3033
3034         bcmgenet_free_rx_buffers(priv);
3035         kfree(priv->rx_cbs);
3036         kfree(priv->tx_cbs);
3037 }
3038
3039 /* init_edma: Initialize DMA control register */
3040 static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
3041 {
3042         int ret;
3043         unsigned int i;
3044         struct enet_cb *cb;
3045
3046         netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
3047
3048         /* Initialize common Rx ring structures */
3049         priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
3050         priv->num_rx_bds = TOTAL_DESC;
3051         priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
3052                                GFP_KERNEL);
3053         if (!priv->rx_cbs)
3054                 return -ENOMEM;
3055
3056         for (i = 0; i < priv->num_rx_bds; i++) {
3057                 cb = priv->rx_cbs + i;
3058                 cb->bd_addr = priv->rx_bds + i * DMA_DESC_SIZE;
3059         }
3060
3061         /* Initialize common TX ring structures */
3062         priv->tx_bds = priv->base + priv->hw_params->tdma_offset;
3063         priv->num_tx_bds = TOTAL_DESC;
3064         priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb),
3065                                GFP_KERNEL);
3066         if (!priv->tx_cbs) {
3067                 kfree(priv->rx_cbs);
3068                 return -ENOMEM;
3069         }
3070
3071         for (i = 0; i < priv->num_tx_bds; i++) {
3072                 cb = priv->tx_cbs + i;
3073                 cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;
3074         }
3075
3076         /* Init rDma */
3077         bcmgenet_rdma_writel(priv, priv->dma_max_burst_length,
3078                              DMA_SCB_BURST_SIZE);
3079
3080         /* Initialize Rx queues */
3081         ret = bcmgenet_init_rx_queues(priv->dev);
3082         if (ret) {
3083                 netdev_err(priv->dev, "failed to initialize Rx queues\n");
3084                 bcmgenet_free_rx_buffers(priv);
3085                 kfree(priv->rx_cbs);
3086                 kfree(priv->tx_cbs);
3087                 return ret;
3088         }
3089
3090         /* Init tDma */
3091         bcmgenet_tdma_writel(priv, priv->dma_max_burst_length,
3092                              DMA_SCB_BURST_SIZE);
3093
3094         /* Initialize Tx queues */
3095         bcmgenet_init_tx_queues(priv->dev);
3096
3097         return 0;
3098 }
3099
3100 /* Interrupt bottom half */
3101 static void bcmgenet_irq_task(struct work_struct *work)
3102 {
3103         unsigned int status;
3104         struct bcmgenet_priv *priv = container_of(
3105                         work, struct bcmgenet_priv, bcmgenet_irq_work);
3106
3107         netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
3108
3109         spin_lock_irq(&priv->lock);
3110         status = priv->irq0_stat;
3111         priv->irq0_stat = 0;
3112         spin_unlock_irq(&priv->lock);
3113
3114         if (status & UMAC_IRQ_PHY_DET_R &&
3115             priv->dev->phydev->autoneg != AUTONEG_ENABLE) {
3116                 phy_init_hw(priv->dev->phydev);
3117                 genphy_config_aneg(priv->dev->phydev);
3118         }
3119
3120         /* Link UP/DOWN event */
3121         if (status & UMAC_IRQ_LINK_EVENT)
3122                 phy_mac_interrupt(priv->dev->phydev);
3123
3124 }
3125
3126 /* bcmgenet_isr1: handle Rx and Tx priority queues */
3127 static irqreturn_t bcmgenet_isr1(int irq, void *dev_id)
3128 {
3129         struct bcmgenet_priv *priv = dev_id;
3130         struct bcmgenet_rx_ring *rx_ring;
3131         struct bcmgenet_tx_ring *tx_ring;
3132         unsigned int index, status;
3133
3134         /* Read irq status */
3135         status = bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
3136                 ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
3137
3138         /* clear interrupts */
3139         bcmgenet_intrl2_1_writel(priv, status, INTRL2_CPU_CLEAR);
3140
3141         netif_dbg(priv, intr, priv->dev,
3142                   "%s: IRQ=0x%x\n", __func__, status);
3143
3144         /* Check Rx priority queue interrupts */
3145         for (index = 0; index < priv->hw_params->rx_queues; index++) {
3146                 if (!(status & BIT(UMAC_IRQ1_RX_INTR_SHIFT + index)))
3147                         continue;
3148
3149                 rx_ring = &priv->rx_rings[index];
3150                 rx_ring->dim.event_ctr++;
3151
3152                 if (likely(napi_schedule_prep(&rx_ring->napi))) {
3153                         rx_ring->int_disable(rx_ring);
3154                         __napi_schedule_irqoff(&rx_ring->napi);
3155                 }
3156         }
3157
3158         /* Check Tx priority queue interrupts */
3159         for (index = 0; index < priv->hw_params->tx_queues; index++) {
3160                 if (!(status & BIT(index)))
3161                         continue;
3162
3163                 tx_ring = &priv->tx_rings[index];
3164
3165                 if (likely(napi_schedule_prep(&tx_ring->napi))) {
3166                         tx_ring->int_disable(tx_ring);
3167                         __napi_schedule_irqoff(&tx_ring->napi);
3168                 }
3169         }
3170
3171         return IRQ_HANDLED;
3172 }
3173
3174 /* bcmgenet_isr0: handle Rx and Tx default queues + other stuff */
3175 static irqreturn_t bcmgenet_isr0(int irq, void *dev_id)
3176 {
3177         struct bcmgenet_priv *priv = dev_id;
3178         struct bcmgenet_rx_ring *rx_ring;
3179         struct bcmgenet_tx_ring *tx_ring;
3180         unsigned int status;
3181         unsigned long flags;
3182
3183         /* Read irq status */
3184         status = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) &
3185                 ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
3186
3187         /* clear interrupts */
3188         bcmgenet_intrl2_0_writel(priv, status, INTRL2_CPU_CLEAR);
3189
3190         netif_dbg(priv, intr, priv->dev,
3191                   "IRQ=0x%x\n", status);
3192
3193         if (status & UMAC_IRQ_RXDMA_DONE) {
3194                 rx_ring = &priv->rx_rings[DESC_INDEX];
3195                 rx_ring->dim.event_ctr++;
3196
3197                 if (likely(napi_schedule_prep(&rx_ring->napi))) {
3198                         rx_ring->int_disable(rx_ring);
3199                         __napi_schedule_irqoff(&rx_ring->napi);
3200                 }
3201         }
3202
3203         if (status & UMAC_IRQ_TXDMA_DONE) {
3204                 tx_ring = &priv->tx_rings[DESC_INDEX];
3205
3206                 if (likely(napi_schedule_prep(&tx_ring->napi))) {
3207                         tx_ring->int_disable(tx_ring);
3208                         __napi_schedule_irqoff(&tx_ring->napi);
3209                 }
3210         }
3211
3212         if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
3213                 status & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) {
3214                 wake_up(&priv->wq);
3215         }
3216
3217         /* all other interested interrupts handled in bottom half */
3218         status &= (UMAC_IRQ_LINK_EVENT | UMAC_IRQ_PHY_DET_R);
3219         if (status) {
3220                 /* Save irq status for bottom-half processing. */
3221                 spin_lock_irqsave(&priv->lock, flags);
3222                 priv->irq0_stat |= status;
3223                 spin_unlock_irqrestore(&priv->lock, flags);
3224
3225                 schedule_work(&priv->bcmgenet_irq_work);
3226         }
3227
3228         return IRQ_HANDLED;
3229 }
3230
3231 static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id)
3232 {
3233         /* Acknowledge the interrupt */
3234         return IRQ_HANDLED;
3235 }
3236
3237 #ifdef CONFIG_NET_POLL_CONTROLLER
3238 static void bcmgenet_poll_controller(struct net_device *dev)
3239 {
3240         struct bcmgenet_priv *priv = netdev_priv(dev);
3241
3242         /* Invoke the main RX/TX interrupt handler */
3243         disable_irq(priv->irq0);
3244         bcmgenet_isr0(priv->irq0, priv);
3245         enable_irq(priv->irq0);
3246
3247         /* And the interrupt handler for RX/TX priority queues */
3248         disable_irq(priv->irq1);
3249         bcmgenet_isr1(priv->irq1, priv);
3250         enable_irq(priv->irq1);
3251 }
3252 #endif
3253
3254 static void bcmgenet_umac_reset(struct bcmgenet_priv *priv)
3255 {
3256         u32 reg;
3257
3258         reg = bcmgenet_rbuf_ctrl_get(priv);
3259         reg |= BIT(1);
3260         bcmgenet_rbuf_ctrl_set(priv, reg);
3261         udelay(10);
3262
3263         reg &= ~BIT(1);
3264         bcmgenet_rbuf_ctrl_set(priv, reg);
3265         udelay(10);
3266 }
3267
3268 static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv,
3269                                  const unsigned char *addr)
3270 {
3271         bcmgenet_umac_writel(priv, get_unaligned_be32(&addr[0]), UMAC_MAC0);
3272         bcmgenet_umac_writel(priv, get_unaligned_be16(&addr[4]), UMAC_MAC1);
3273 }
3274
3275 static void bcmgenet_get_hw_addr(struct bcmgenet_priv *priv,
3276                                  unsigned char *addr)
3277 {
3278         u32 addr_tmp;
3279
3280         addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC0);
3281         put_unaligned_be32(addr_tmp, &addr[0]);
3282         addr_tmp = bcmgenet_umac_readl(priv, UMAC_MAC1);
3283         put_unaligned_be16(addr_tmp, &addr[4]);
3284 }
3285
3286 /* Returns a reusable dma control register value */
3287 static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
3288 {
3289         unsigned int i;
3290         u32 reg;
3291         u32 dma_ctrl;
3292
3293         /* disable DMA */
3294         dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
3295         for (i = 0; i < priv->hw_params->tx_queues; i++)
3296                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3297         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3298         reg &= ~dma_ctrl;
3299         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3300
3301         dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
3302         for (i = 0; i < priv->hw_params->rx_queues; i++)
3303                 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
3304         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3305         reg &= ~dma_ctrl;
3306         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3307
3308         bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH);
3309         udelay(10);
3310         bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
3311
3312         return dma_ctrl;
3313 }
3314
3315 static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
3316 {
3317         u32 reg;
3318
3319         reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
3320         reg |= dma_ctrl;
3321         bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
3322
3323         reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
3324         reg |= dma_ctrl;
3325         bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
3326 }
3327
3328 static void bcmgenet_netif_start(struct net_device *dev)
3329 {
3330         struct bcmgenet_priv *priv = netdev_priv(dev);
3331
3332         /* Start the network engine */
3333         bcmgenet_set_rx_mode(dev);
3334         bcmgenet_enable_rx_napi(priv);
3335
3336         umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
3337
3338         bcmgenet_enable_tx_napi(priv);
3339
3340         /* Monitor link interrupts now */
3341         bcmgenet_link_intr_enable(priv);
3342
3343         phy_start(dev->phydev);
3344 }
3345
3346 static int bcmgenet_open(struct net_device *dev)
3347 {
3348         struct bcmgenet_priv *priv = netdev_priv(dev);
3349         unsigned long dma_ctrl;
3350         int ret;
3351
3352         netif_dbg(priv, ifup, dev, "bcmgenet_open\n");
3353
3354         /* Turn on the clock */
3355         clk_prepare_enable(priv->clk);
3356
3357         /* If this is an internal GPHY, power it back on now, before UniMAC is
3358          * brought out of reset as absolutely no UniMAC activity is allowed
3359          */
3360         if (priv->internal_phy)
3361                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
3362
3363         /* take MAC out of reset */
3364         bcmgenet_umac_reset(priv);
3365
3366         init_umac(priv);
3367
3368         /* Apply features again in case we changed them while interface was
3369          * down
3370          */
3371         bcmgenet_set_features(dev, dev->features);
3372
3373         bcmgenet_set_hw_addr(priv, dev->dev_addr);
3374
3375         /* Disable RX/TX DMA and flush TX queues */
3376         dma_ctrl = bcmgenet_dma_disable(priv);
3377
3378         /* Reinitialize TDMA and RDMA and SW housekeeping */
3379         ret = bcmgenet_init_dma(priv);
3380         if (ret) {
3381                 netdev_err(dev, "failed to initialize DMA\n");
3382                 goto err_clk_disable;
3383         }
3384
3385         /* Always enable ring 16 - descriptor ring */
3386         bcmgenet_enable_dma(priv, dma_ctrl);
3387
3388         /* HFB init */
3389         bcmgenet_hfb_init(priv);
3390
3391         ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED,
3392                           dev->name, priv);
3393         if (ret < 0) {
3394                 netdev_err(dev, "can't request IRQ %d\n", priv->irq0);
3395                 goto err_fini_dma;
3396         }
3397
3398         ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED,
3399                           dev->name, priv);
3400         if (ret < 0) {
3401                 netdev_err(dev, "can't request IRQ %d\n", priv->irq1);
3402                 goto err_irq0;
3403         }
3404
3405         ret = bcmgenet_mii_probe(dev);
3406         if (ret) {
3407                 netdev_err(dev, "failed to connect to PHY\n");
3408                 goto err_irq1;
3409         }
3410
3411         bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
3412
3413         bcmgenet_netif_start(dev);
3414
3415         netif_tx_start_all_queues(dev);
3416
3417         return 0;
3418
3419 err_irq1:
3420         free_irq(priv->irq1, priv);
3421 err_irq0:
3422         free_irq(priv->irq0, priv);
3423 err_fini_dma:
3424         bcmgenet_dma_teardown(priv);
3425         bcmgenet_fini_dma(priv);
3426 err_clk_disable:
3427         if (priv->internal_phy)
3428                 bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
3429         clk_disable_unprepare(priv->clk);
3430         return ret;
3431 }
3432
3433 static void bcmgenet_netif_stop(struct net_device *dev)
3434 {
3435         struct bcmgenet_priv *priv = netdev_priv(dev);
3436
3437         bcmgenet_disable_tx_napi(priv);
3438         netif_tx_disable(dev);
3439
3440         /* Disable MAC receive */
3441         umac_enable_set(priv, CMD_RX_EN, false);
3442
3443         bcmgenet_dma_teardown(priv);
3444
3445         /* Disable MAC transmit. TX DMA disabled must be done before this */
3446         umac_enable_set(priv, CMD_TX_EN, false);
3447
3448         phy_stop(dev->phydev);
3449         bcmgenet_disable_rx_napi(priv);
3450         bcmgenet_intr_disable(priv);
3451
3452         /* Wait for pending work items to complete. Since interrupts are
3453          * disabled no new work will be scheduled.
3454          */
3455         cancel_work_sync(&priv->bcmgenet_irq_work);
3456
3457         /* tx reclaim */
3458         bcmgenet_tx_reclaim_all(dev);
3459         bcmgenet_fini_dma(priv);
3460 }
3461
3462 static int bcmgenet_close(struct net_device *dev)
3463 {
3464         struct bcmgenet_priv *priv = netdev_priv(dev);
3465         int ret = 0;
3466
3467         netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
3468
3469         bcmgenet_netif_stop(dev);
3470
3471         /* Really kill the PHY state machine and disconnect from it */
3472         phy_disconnect(dev->phydev);
3473
3474         free_irq(priv->irq0, priv);
3475         free_irq(priv->irq1, priv);
3476
3477         if (priv->internal_phy)
3478                 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
3479
3480         clk_disable_unprepare(priv->clk);
3481
3482         return ret;
3483 }
3484
3485 static void bcmgenet_dump_tx_queue(struct bcmgenet_tx_ring *ring)
3486 {
3487         struct bcmgenet_priv *priv = ring->priv;
3488         u32 p_index, c_index, intsts, intmsk;
3489         struct netdev_queue *txq;
3490         unsigned int free_bds;
3491         bool txq_stopped;
3492
3493         if (!netif_msg_tx_err(priv))
3494                 return;
3495
3496         txq = netdev_get_tx_queue(priv->dev, ring->queue);
3497
3498         spin_lock(&ring->lock);
3499         if (ring->index == DESC_INDEX) {
3500                 intsts = ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
3501                 intmsk = UMAC_IRQ_TXDMA_DONE | UMAC_IRQ_TXDMA_MBDONE;
3502         } else {
3503                 intsts = ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
3504                 intmsk = 1 << ring->index;
3505         }
3506         c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
3507         p_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_PROD_INDEX);
3508         txq_stopped = netif_tx_queue_stopped(txq);
3509         free_bds = ring->free_bds;
3510         spin_unlock(&ring->lock);
3511
3512         netif_err(priv, tx_err, priv->dev, "Ring %d queue %d status summary\n"
3513                   "TX queue status: %s, interrupts: %s\n"
3514                   "(sw)free_bds: %d (sw)size: %d\n"
3515                   "(sw)p_index: %d (hw)p_index: %d\n"
3516                   "(sw)c_index: %d (hw)c_index: %d\n"
3517                   "(sw)clean_p: %d (sw)write_p: %d\n"
3518                   "(sw)cb_ptr: %d (sw)end_ptr: %d\n",
3519                   ring->index, ring->queue,
3520                   txq_stopped ? "stopped" : "active",
3521                   intsts & intmsk ? "enabled" : "disabled",
3522                   free_bds, ring->size,
3523                   ring->prod_index, p_index & DMA_P_INDEX_MASK,
3524                   ring->c_index, c_index & DMA_C_INDEX_MASK,
3525                   ring->clean_ptr, ring->write_ptr,
3526                   ring->cb_ptr, ring->end_ptr);
3527 }
3528
3529 static void bcmgenet_timeout(struct net_device *dev, unsigned int txqueue)
3530 {
3531         struct bcmgenet_priv *priv = netdev_priv(dev);
3532         u32 int0_enable = 0;
3533         u32 int1_enable = 0;
3534         unsigned int q;
3535
3536         netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
3537
3538         for (q = 0; q < priv->hw_params->tx_queues; q++)
3539                 bcmgenet_dump_tx_queue(&priv->tx_rings[q]);
3540         bcmgenet_dump_tx_queue(&priv->tx_rings[DESC_INDEX]);
3541
3542         bcmgenet_tx_reclaim_all(dev);
3543
3544         for (q = 0; q < priv->hw_params->tx_queues; q++)
3545                 int1_enable |= (1 << q);
3546
3547         int0_enable = UMAC_IRQ_TXDMA_DONE;
3548
3549         /* Re-enable TX interrupts if disabled */
3550         bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
3551         bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
3552
3553         netif_trans_update(dev);
3554
3555         dev->stats.tx_errors++;
3556
3557         netif_tx_wake_all_queues(dev);
3558 }
3559
3560 #define MAX_MDF_FILTER  17
3561
3562 static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv,
3563                                          const unsigned char *addr,
3564                                          int *i)
3565 {
3566         bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1],
3567                              UMAC_MDF_ADDR + (*i * 4));
3568         bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 |
3569                              addr[4] << 8 | addr[5],
3570                              UMAC_MDF_ADDR + ((*i + 1) * 4));
3571         *i += 2;
3572 }
3573
3574 static void bcmgenet_set_rx_mode(struct net_device *dev)
3575 {
3576         struct bcmgenet_priv *priv = netdev_priv(dev);
3577         struct netdev_hw_addr *ha;
3578         int i, nfilter;
3579         u32 reg;
3580
3581         netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags);
3582
3583         /* Number of filters needed */
3584         nfilter = netdev_uc_count(dev) + netdev_mc_count(dev) + 2;
3585
3586         /*
3587          * Turn on promicuous mode for three scenarios
3588          * 1. IFF_PROMISC flag is set
3589          * 2. IFF_ALLMULTI flag is set
3590          * 3. The number of filters needed exceeds the number filters
3591          *    supported by the hardware.
3592         */
3593         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
3594         if ((dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) ||
3595             (nfilter > MAX_MDF_FILTER)) {
3596                 reg |= CMD_PROMISC;
3597                 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3598                 bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL);
3599                 return;
3600         } else {
3601                 reg &= ~CMD_PROMISC;
3602                 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3603         }
3604
3605         /* update MDF filter */
3606         i = 0;
3607         /* Broadcast */
3608         bcmgenet_set_mdf_addr(priv, dev->broadcast, &i);
3609         /* my own address.*/
3610         bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i);
3611
3612         /* Unicast */
3613         netdev_for_each_uc_addr(ha, dev)
3614                 bcmgenet_set_mdf_addr(priv, ha->addr, &i);
3615
3616         /* Multicast */
3617         netdev_for_each_mc_addr(ha, dev)
3618                 bcmgenet_set_mdf_addr(priv, ha->addr, &i);
3619
3620         /* Enable filters */
3621         reg = GENMASK(MAX_MDF_FILTER - 1, MAX_MDF_FILTER - nfilter);
3622         bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL);
3623 }
3624
3625 /* Set the hardware MAC address. */
3626 static int bcmgenet_set_mac_addr(struct net_device *dev, void *p)
3627 {
3628         struct sockaddr *addr = p;
3629
3630         /* Setting the MAC address at the hardware level is not possible
3631          * without disabling the UniMAC RX/TX enable bits.
3632          */
3633         if (netif_running(dev))
3634                 return -EBUSY;
3635
3636         eth_hw_addr_set(dev, addr->sa_data);
3637
3638         return 0;
3639 }
3640
3641 static struct net_device_stats *bcmgenet_get_stats(struct net_device *dev)
3642 {
3643         struct bcmgenet_priv *priv = netdev_priv(dev);
3644         unsigned long tx_bytes = 0, tx_packets = 0;
3645         unsigned long rx_bytes = 0, rx_packets = 0;
3646         unsigned long rx_errors = 0, rx_dropped = 0;
3647         struct bcmgenet_tx_ring *tx_ring;
3648         struct bcmgenet_rx_ring *rx_ring;
3649         unsigned int q;
3650
3651         for (q = 0; q < priv->hw_params->tx_queues; q++) {
3652                 tx_ring = &priv->tx_rings[q];
3653                 tx_bytes += tx_ring->bytes;
3654                 tx_packets += tx_ring->packets;
3655         }
3656         tx_ring = &priv->tx_rings[DESC_INDEX];
3657         tx_bytes += tx_ring->bytes;
3658         tx_packets += tx_ring->packets;
3659
3660         for (q = 0; q < priv->hw_params->rx_queues; q++) {
3661                 rx_ring = &priv->rx_rings[q];
3662
3663                 rx_bytes += rx_ring->bytes;
3664                 rx_packets += rx_ring->packets;
3665                 rx_errors += rx_ring->errors;
3666                 rx_dropped += rx_ring->dropped;
3667         }
3668         rx_ring = &priv->rx_rings[DESC_INDEX];
3669         rx_bytes += rx_ring->bytes;
3670         rx_packets += rx_ring->packets;
3671         rx_errors += rx_ring->errors;
3672         rx_dropped += rx_ring->dropped;
3673
3674         dev->stats.tx_bytes = tx_bytes;
3675         dev->stats.tx_packets = tx_packets;
3676         dev->stats.rx_bytes = rx_bytes;
3677         dev->stats.rx_packets = rx_packets;
3678         dev->stats.rx_errors = rx_errors;
3679         dev->stats.rx_missed_errors = rx_errors;
3680         dev->stats.rx_dropped = rx_dropped;
3681         return &dev->stats;
3682 }
3683
3684 static int bcmgenet_change_carrier(struct net_device *dev, bool new_carrier)
3685 {
3686         struct bcmgenet_priv *priv = netdev_priv(dev);
3687
3688         if (!dev->phydev || !phy_is_pseudo_fixed_link(dev->phydev) ||
3689             priv->phy_interface != PHY_INTERFACE_MODE_MOCA)
3690                 return -EOPNOTSUPP;
3691
3692         if (new_carrier)
3693                 netif_carrier_on(dev);
3694         else
3695                 netif_carrier_off(dev);
3696
3697         return 0;
3698 }
3699
3700 static const struct net_device_ops bcmgenet_netdev_ops = {
3701         .ndo_open               = bcmgenet_open,
3702         .ndo_stop               = bcmgenet_close,
3703         .ndo_start_xmit         = bcmgenet_xmit,
3704         .ndo_tx_timeout         = bcmgenet_timeout,
3705         .ndo_set_rx_mode        = bcmgenet_set_rx_mode,
3706         .ndo_set_mac_address    = bcmgenet_set_mac_addr,
3707         .ndo_eth_ioctl          = phy_do_ioctl_running,
3708         .ndo_set_features       = bcmgenet_set_features,
3709 #ifdef CONFIG_NET_POLL_CONTROLLER
3710         .ndo_poll_controller    = bcmgenet_poll_controller,
3711 #endif
3712         .ndo_get_stats          = bcmgenet_get_stats,
3713         .ndo_change_carrier     = bcmgenet_change_carrier,
3714 };
3715
3716 /* Array of GENET hardware parameters/characteristics */
3717 static struct bcmgenet_hw_params bcmgenet_hw_params[] = {
3718         [GENET_V1] = {
3719                 .tx_queues = 0,
3720                 .tx_bds_per_q = 0,
3721                 .rx_queues = 0,
3722                 .rx_bds_per_q = 0,
3723                 .bp_in_en_shift = 16,
3724                 .bp_in_mask = 0xffff,
3725                 .hfb_filter_cnt = 16,
3726                 .qtag_mask = 0x1F,
3727                 .hfb_offset = 0x1000,
3728                 .rdma_offset = 0x2000,
3729                 .tdma_offset = 0x3000,
3730                 .words_per_bd = 2,
3731         },
3732         [GENET_V2] = {
3733                 .tx_queues = 4,
3734                 .tx_bds_per_q = 32,
3735                 .rx_queues = 0,
3736                 .rx_bds_per_q = 0,
3737                 .bp_in_en_shift = 16,
3738                 .bp_in_mask = 0xffff,
3739                 .hfb_filter_cnt = 16,
3740                 .qtag_mask = 0x1F,
3741                 .tbuf_offset = 0x0600,
3742                 .hfb_offset = 0x1000,
3743                 .hfb_reg_offset = 0x2000,
3744                 .rdma_offset = 0x3000,
3745                 .tdma_offset = 0x4000,
3746                 .words_per_bd = 2,
3747                 .flags = GENET_HAS_EXT,
3748         },
3749         [GENET_V3] = {
3750                 .tx_queues = 4,
3751                 .tx_bds_per_q = 32,
3752                 .rx_queues = 0,
3753                 .rx_bds_per_q = 0,
3754                 .bp_in_en_shift = 17,
3755                 .bp_in_mask = 0x1ffff,
3756                 .hfb_filter_cnt = 48,
3757                 .hfb_filter_size = 128,
3758                 .qtag_mask = 0x3F,
3759                 .tbuf_offset = 0x0600,
3760                 .hfb_offset = 0x8000,
3761                 .hfb_reg_offset = 0xfc00,
3762                 .rdma_offset = 0x10000,
3763                 .tdma_offset = 0x11000,
3764                 .words_per_bd = 2,
3765                 .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR |
3766                          GENET_HAS_MOCA_LINK_DET,
3767         },
3768         [GENET_V4] = {
3769                 .tx_queues = 4,
3770                 .tx_bds_per_q = 32,
3771                 .rx_queues = 0,
3772                 .rx_bds_per_q = 0,
3773                 .bp_in_en_shift = 17,
3774                 .bp_in_mask = 0x1ffff,
3775                 .hfb_filter_cnt = 48,
3776                 .hfb_filter_size = 128,
3777                 .qtag_mask = 0x3F,
3778                 .tbuf_offset = 0x0600,
3779                 .hfb_offset = 0x8000,
3780                 .hfb_reg_offset = 0xfc00,
3781                 .rdma_offset = 0x2000,
3782                 .tdma_offset = 0x4000,
3783                 .words_per_bd = 3,
3784                 .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
3785                          GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
3786         },
3787         [GENET_V5] = {
3788                 .tx_queues = 4,
3789                 .tx_bds_per_q = 32,
3790                 .rx_queues = 0,
3791                 .rx_bds_per_q = 0,
3792                 .bp_in_en_shift = 17,
3793                 .bp_in_mask = 0x1ffff,
3794                 .hfb_filter_cnt = 48,
3795                 .hfb_filter_size = 128,
3796                 .qtag_mask = 0x3F,
3797                 .tbuf_offset = 0x0600,
3798                 .hfb_offset = 0x8000,
3799                 .hfb_reg_offset = 0xfc00,
3800                 .rdma_offset = 0x2000,
3801                 .tdma_offset = 0x4000,
3802                 .words_per_bd = 3,
3803                 .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
3804                          GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
3805         },
3806 };
3807
3808 /* Infer hardware parameters from the detected GENET version */
3809 static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
3810 {
3811         struct bcmgenet_hw_params *params;
3812         u32 reg;
3813         u8 major;
3814         u16 gphy_rev;
3815
3816         if (GENET_IS_V5(priv) || GENET_IS_V4(priv)) {
3817                 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3818                 genet_dma_ring_regs = genet_dma_ring_regs_v4;
3819         } else if (GENET_IS_V3(priv)) {
3820                 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3821                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3822         } else if (GENET_IS_V2(priv)) {
3823                 bcmgenet_dma_regs = bcmgenet_dma_regs_v2;
3824                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3825         } else if (GENET_IS_V1(priv)) {
3826                 bcmgenet_dma_regs = bcmgenet_dma_regs_v1;
3827                 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3828         }
3829
3830         /* enum genet_version starts at 1 */
3831         priv->hw_params = &bcmgenet_hw_params[priv->version];
3832         params = priv->hw_params;
3833
3834         /* Read GENET HW version */
3835         reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL);
3836         major = (reg >> 24 & 0x0f);
3837         if (major == 6)
3838                 major = 5;
3839         else if (major == 5)
3840                 major = 4;
3841         else if (major == 0)
3842                 major = 1;
3843         if (major != priv->version) {
3844                 dev_err(&priv->pdev->dev,
3845                         "GENET version mismatch, got: %d, configured for: %d\n",
3846                         major, priv->version);
3847         }
3848
3849         /* Print the GENET core version */
3850         dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT,
3851                  major, (reg >> 16) & 0x0f, reg & 0xffff);
3852
3853         /* Store the integrated PHY revision for the MDIO probing function
3854          * to pass this information to the PHY driver. The PHY driver expects
3855          * to find the PHY major revision in bits 15:8 while the GENET register
3856          * stores that information in bits 7:0, account for that.
3857          *
3858          * On newer chips, starting with PHY revision G0, a new scheme is
3859          * deployed similar to the Starfighter 2 switch with GPHY major
3860          * revision in bits 15:8 and patch level in bits 7:0. Major revision 0
3861          * is reserved as well as special value 0x01ff, we have a small
3862          * heuristic to check for the new GPHY revision and re-arrange things
3863          * so the GPHY driver is happy.
3864          */
3865         gphy_rev = reg & 0xffff;
3866
3867         if (GENET_IS_V5(priv)) {
3868                 /* The EPHY revision should come from the MDIO registers of
3869                  * the PHY not from GENET.
3870                  */
3871                 if (gphy_rev != 0) {
3872                         pr_warn("GENET is reporting EPHY revision: 0x%04x\n",
3873                                 gphy_rev);
3874                 }
3875         /* This is reserved so should require special treatment */
3876         } else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
3877                 pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
3878                 return;
3879         /* This is the good old scheme, just GPHY major, no minor nor patch */
3880         } else if ((gphy_rev & 0xf0) != 0) {
3881                 priv->gphy_rev = gphy_rev << 8;
3882         /* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
3883         } else if ((gphy_rev & 0xff00) != 0) {
3884                 priv->gphy_rev = gphy_rev;
3885         }
3886
3887 #ifdef CONFIG_PHYS_ADDR_T_64BIT
3888         if (!(params->flags & GENET_HAS_40BITS))
3889                 pr_warn("GENET does not support 40-bits PA\n");
3890 #endif
3891
3892         pr_debug("Configuration for version: %d\n"
3893                 "TXq: %1d, TXqBDs: %1d, RXq: %1d, RXqBDs: %1d\n"
3894                 "BP << en: %2d, BP msk: 0x%05x\n"
3895                 "HFB count: %2d, QTAQ msk: 0x%05x\n"
3896                 "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n"
3897                 "RDMA: 0x%05x, TDMA: 0x%05x\n"
3898                 "Words/BD: %d\n",
3899                 priv->version,
3900                 params->tx_queues, params->tx_bds_per_q,
3901                 params->rx_queues, params->rx_bds_per_q,
3902                 params->bp_in_en_shift, params->bp_in_mask,
3903                 params->hfb_filter_cnt, params->qtag_mask,
3904                 params->tbuf_offset, params->hfb_offset,
3905                 params->hfb_reg_offset,
3906                 params->rdma_offset, params->tdma_offset,
3907                 params->words_per_bd);
3908 }
3909
3910 struct bcmgenet_plat_data {
3911         enum bcmgenet_version version;
3912         u32 dma_max_burst_length;
3913         bool ephy_16nm;
3914 };
3915
3916 static const struct bcmgenet_plat_data v1_plat_data = {
3917         .version = GENET_V1,
3918         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3919 };
3920
3921 static const struct bcmgenet_plat_data v2_plat_data = {
3922         .version = GENET_V2,
3923         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3924 };
3925
3926 static const struct bcmgenet_plat_data v3_plat_data = {
3927         .version = GENET_V3,
3928         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3929 };
3930
3931 static const struct bcmgenet_plat_data v4_plat_data = {
3932         .version = GENET_V4,
3933         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3934 };
3935
3936 static const struct bcmgenet_plat_data v5_plat_data = {
3937         .version = GENET_V5,
3938         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3939 };
3940
3941 static const struct bcmgenet_plat_data bcm2711_plat_data = {
3942         .version = GENET_V5,
3943         .dma_max_burst_length = 0x08,
3944 };
3945
3946 static const struct bcmgenet_plat_data bcm7712_plat_data = {
3947         .version = GENET_V5,
3948         .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
3949         .ephy_16nm = true,
3950 };
3951
3952 static const struct of_device_id bcmgenet_match[] = {
3953         { .compatible = "brcm,genet-v1", .data = &v1_plat_data },
3954         { .compatible = "brcm,genet-v2", .data = &v2_plat_data },
3955         { .compatible = "brcm,genet-v3", .data = &v3_plat_data },
3956         { .compatible = "brcm,genet-v4", .data = &v4_plat_data },
3957         { .compatible = "brcm,genet-v5", .data = &v5_plat_data },
3958         { .compatible = "brcm,bcm2711-genet-v5", .data = &bcm2711_plat_data },
3959         { .compatible = "brcm,bcm7712-genet-v5", .data = &bcm7712_plat_data },
3960         { },
3961 };
3962 MODULE_DEVICE_TABLE(of, bcmgenet_match);
3963
3964 static int bcmgenet_probe(struct platform_device *pdev)
3965 {
3966         struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
3967         const struct bcmgenet_plat_data *pdata;
3968         struct bcmgenet_priv *priv;
3969         struct net_device *dev;
3970         unsigned int i;
3971         int err = -EIO;
3972
3973         /* Up to GENET_MAX_MQ_CNT + 1 TX queues and RX queues */
3974         dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1,
3975                                  GENET_MAX_MQ_CNT + 1);
3976         if (!dev) {
3977                 dev_err(&pdev->dev, "can't allocate net device\n");
3978                 return -ENOMEM;
3979         }
3980
3981         priv = netdev_priv(dev);
3982         priv->irq0 = platform_get_irq(pdev, 0);
3983         if (priv->irq0 < 0) {
3984                 err = priv->irq0;
3985                 goto err;
3986         }
3987         priv->irq1 = platform_get_irq(pdev, 1);
3988         if (priv->irq1 < 0) {
3989                 err = priv->irq1;
3990                 goto err;
3991         }
3992         priv->wol_irq = platform_get_irq_optional(pdev, 2);
3993
3994         priv->base = devm_platform_ioremap_resource(pdev, 0);
3995         if (IS_ERR(priv->base)) {
3996                 err = PTR_ERR(priv->base);
3997                 goto err;
3998         }
3999
4000         spin_lock_init(&priv->lock);
4001
4002         /* Set default pause parameters */
4003         priv->autoneg_pause = 1;
4004         priv->tx_pause = 1;
4005         priv->rx_pause = 1;
4006
4007         SET_NETDEV_DEV(dev, &pdev->dev);
4008         dev_set_drvdata(&pdev->dev, dev);
4009         dev->watchdog_timeo = 2 * HZ;
4010         dev->ethtool_ops = &bcmgenet_ethtool_ops;
4011         dev->netdev_ops = &bcmgenet_netdev_ops;
4012
4013         priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);
4014
4015         /* Set default features */
4016         dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
4017                          NETIF_F_RXCSUM;
4018         dev->hw_features |= dev->features;
4019         dev->vlan_features |= dev->features;
4020
4021         /* Request the WOL interrupt and advertise suspend if available */
4022         priv->wol_irq_disabled = true;
4023         if (priv->wol_irq > 0) {
4024                 err = devm_request_irq(&pdev->dev, priv->wol_irq,
4025                                        bcmgenet_wol_isr, 0, dev->name, priv);
4026                 if (!err)
4027                         device_set_wakeup_capable(&pdev->dev, 1);
4028         }
4029
4030         /* Set the needed headroom to account for any possible
4031          * features enabling/disabling at runtime
4032          */
4033         dev->needed_headroom += 64;
4034
4035         priv->dev = dev;
4036         priv->pdev = pdev;
4037
4038         pdata = device_get_match_data(&pdev->dev);
4039         if (pdata) {
4040                 priv->version = pdata->version;
4041                 priv->dma_max_burst_length = pdata->dma_max_burst_length;
4042                 priv->ephy_16nm = pdata->ephy_16nm;
4043         } else {
4044                 priv->version = pd->genet_version;
4045                 priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH;
4046         }
4047
4048         priv->clk = devm_clk_get_optional(&priv->pdev->dev, "enet");
4049         if (IS_ERR(priv->clk)) {
4050                 dev_dbg(&priv->pdev->dev, "failed to get enet clock\n");
4051                 err = PTR_ERR(priv->clk);
4052                 goto err;
4053         }
4054
4055         err = clk_prepare_enable(priv->clk);
4056         if (err)
4057                 goto err;
4058
4059         bcmgenet_set_hw_params(priv);
4060
4061         err = -EIO;
4062         if (priv->hw_params->flags & GENET_HAS_40BITS)
4063                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
4064         if (err)
4065                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4066         if (err)
4067                 goto err_clk_disable;
4068
4069         /* Mii wait queue */
4070         init_waitqueue_head(&priv->wq);
4071         /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
4072         priv->rx_buf_len = RX_BUF_LENGTH;
4073         INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
4074
4075         priv->clk_wol = devm_clk_get_optional(&priv->pdev->dev, "enet-wol");
4076         if (IS_ERR(priv->clk_wol)) {
4077                 dev_dbg(&priv->pdev->dev, "failed to get enet-wol clock\n");
4078                 err = PTR_ERR(priv->clk_wol);
4079                 goto err_clk_disable;
4080         }
4081
4082         priv->clk_eee = devm_clk_get_optional(&priv->pdev->dev, "enet-eee");
4083         if (IS_ERR(priv->clk_eee)) {
4084                 dev_dbg(&priv->pdev->dev, "failed to get enet-eee clock\n");
4085                 err = PTR_ERR(priv->clk_eee);
4086                 goto err_clk_disable;
4087         }
4088
4089         /* If this is an internal GPHY, power it on now, before UniMAC is
4090          * brought out of reset as absolutely no UniMAC activity is allowed
4091          */
4092         if (device_get_phy_mode(&pdev->dev) == PHY_INTERFACE_MODE_INTERNAL)
4093                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
4094
4095         if (pd && !IS_ERR_OR_NULL(pd->mac_address))
4096                 eth_hw_addr_set(dev, pd->mac_address);
4097         else
4098                 if (device_get_ethdev_address(&pdev->dev, dev))
4099                         if (has_acpi_companion(&pdev->dev)) {
4100                                 u8 addr[ETH_ALEN];
4101
4102                                 bcmgenet_get_hw_addr(priv, addr);
4103                                 eth_hw_addr_set(dev, addr);
4104                         }
4105
4106         if (!is_valid_ether_addr(dev->dev_addr)) {
4107                 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
4108                 eth_hw_addr_random(dev);
4109         }
4110
4111         reset_umac(priv);
4112
4113         err = bcmgenet_mii_init(dev);
4114         if (err)
4115                 goto err_clk_disable;
4116
4117         /* setup number of real queues  + 1 (GENET_V1 has 0 hardware queues
4118          * just the ring 16 descriptor based TX
4119          */
4120         netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1);
4121         netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1);
4122
4123         /* Set default coalescing parameters */
4124         for (i = 0; i < priv->hw_params->rx_queues; i++)
4125                 priv->rx_rings[i].rx_max_coalesced_frames = 1;
4126         priv->rx_rings[DESC_INDEX].rx_max_coalesced_frames = 1;
4127
4128         /* libphy will determine the link state */
4129         netif_carrier_off(dev);
4130
4131         /* Turn off the main clock, WOL clock is handled separately */
4132         clk_disable_unprepare(priv->clk);
4133
4134         err = register_netdev(dev);
4135         if (err) {
4136                 bcmgenet_mii_exit(dev);
4137                 goto err;
4138         }
4139
4140         return err;
4141
4142 err_clk_disable:
4143         clk_disable_unprepare(priv->clk);
4144 err:
4145         free_netdev(dev);
4146         return err;
4147 }
4148
4149 static int bcmgenet_remove(struct platform_device *pdev)
4150 {
4151         struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev);
4152
4153         dev_set_drvdata(&pdev->dev, NULL);
4154         unregister_netdev(priv->dev);
4155         bcmgenet_mii_exit(priv->dev);
4156         free_netdev(priv->dev);
4157
4158         return 0;
4159 }
4160
4161 static void bcmgenet_shutdown(struct platform_device *pdev)
4162 {
4163         bcmgenet_remove(pdev);
4164 }
4165
4166 #ifdef CONFIG_PM_SLEEP
4167 static int bcmgenet_resume_noirq(struct device *d)
4168 {
4169         struct net_device *dev = dev_get_drvdata(d);
4170         struct bcmgenet_priv *priv = netdev_priv(dev);
4171         int ret;
4172         u32 reg;
4173
4174         if (!netif_running(dev))
4175                 return 0;
4176
4177         /* Turn on the clock */
4178         ret = clk_prepare_enable(priv->clk);
4179         if (ret)
4180                 return ret;
4181
4182         if (device_may_wakeup(d) && priv->wolopts) {
4183                 /* Account for Wake-on-LAN events and clear those events
4184                  * (Some devices need more time between enabling the clocks
4185                  *  and the interrupt register reflecting the wake event so
4186                  *  read the register twice)
4187                  */
4188                 reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
4189                 reg = bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT);
4190                 if (reg & UMAC_IRQ_WAKE_EVENT)
4191                         pm_wakeup_event(&priv->pdev->dev, 0);
4192         }
4193
4194         bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_WAKE_EVENT, INTRL2_CPU_CLEAR);
4195
4196         return 0;
4197 }
4198
4199 static int bcmgenet_resume(struct device *d)
4200 {
4201         struct net_device *dev = dev_get_drvdata(d);
4202         struct bcmgenet_priv *priv = netdev_priv(dev);
4203         struct bcmgenet_rxnfc_rule *rule;
4204         unsigned long dma_ctrl;
4205         int ret;
4206
4207         if (!netif_running(dev))
4208                 return 0;
4209
4210         /* From WOL-enabled suspend, switch to regular clock */
4211         if (device_may_wakeup(d) && priv->wolopts)
4212                 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
4213
4214         /* If this is an internal GPHY, power it back on now, before UniMAC is
4215          * brought out of reset as absolutely no UniMAC activity is allowed
4216          */
4217         if (priv->internal_phy)
4218                 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
4219
4220         bcmgenet_umac_reset(priv);
4221
4222         init_umac(priv);
4223
4224         phy_init_hw(dev->phydev);
4225
4226         /* Speed settings must be restored */
4227         genphy_config_aneg(dev->phydev);
4228         bcmgenet_mii_config(priv->dev, false);
4229
4230         /* Restore enabled features */
4231         bcmgenet_set_features(dev, dev->features);
4232
4233         bcmgenet_set_hw_addr(priv, dev->dev_addr);
4234
4235         /* Restore hardware filters */
4236         bcmgenet_hfb_clear(priv);
4237         list_for_each_entry(rule, &priv->rxnfc_list, list)
4238                 if (rule->state != BCMGENET_RXNFC_STATE_UNUSED)
4239                         bcmgenet_hfb_create_rxnfc_filter(priv, rule);
4240
4241         /* Disable RX/TX DMA and flush TX queues */
4242         dma_ctrl = bcmgenet_dma_disable(priv);
4243
4244         /* Reinitialize TDMA and RDMA and SW housekeeping */
4245         ret = bcmgenet_init_dma(priv);
4246         if (ret) {
4247                 netdev_err(dev, "failed to initialize DMA\n");
4248                 goto out_clk_disable;
4249         }
4250
4251         /* Always enable ring 16 - descriptor ring */
4252         bcmgenet_enable_dma(priv, dma_ctrl);
4253
4254         if (!device_may_wakeup(d))
4255                 phy_resume(dev->phydev);
4256
4257         if (priv->eee.eee_enabled)
4258                 bcmgenet_eee_enable_set(dev, true);
4259
4260         bcmgenet_netif_start(dev);
4261
4262         netif_device_attach(dev);
4263
4264         return 0;
4265
4266 out_clk_disable:
4267         if (priv->internal_phy)
4268                 bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
4269         clk_disable_unprepare(priv->clk);
4270         return ret;
4271 }
4272
4273 static int bcmgenet_suspend(struct device *d)
4274 {
4275         struct net_device *dev = dev_get_drvdata(d);
4276         struct bcmgenet_priv *priv = netdev_priv(dev);
4277
4278         if (!netif_running(dev))
4279                 return 0;
4280
4281         netif_device_detach(dev);
4282
4283         bcmgenet_netif_stop(dev);
4284
4285         if (!device_may_wakeup(d))
4286                 phy_suspend(dev->phydev);
4287
4288         /* Disable filtering */
4289         bcmgenet_hfb_reg_writel(priv, 0, HFB_CTRL);
4290
4291         return 0;
4292 }
4293
4294 static int bcmgenet_suspend_noirq(struct device *d)
4295 {
4296         struct net_device *dev = dev_get_drvdata(d);
4297         struct bcmgenet_priv *priv = netdev_priv(dev);
4298         int ret = 0;
4299
4300         if (!netif_running(dev))
4301                 return 0;
4302
4303         /* Prepare the device for Wake-on-LAN and switch to the slow clock */
4304         if (device_may_wakeup(d) && priv->wolopts)
4305                 ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
4306         else if (priv->internal_phy)
4307                 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
4308
4309         /* Let the framework handle resumption and leave the clocks on */
4310         if (ret)
4311                 return ret;
4312
4313         /* Turn off the clocks */
4314         clk_disable_unprepare(priv->clk);
4315
4316         return 0;
4317 }
4318 #else
4319 #define bcmgenet_suspend        NULL
4320 #define bcmgenet_suspend_noirq  NULL
4321 #define bcmgenet_resume         NULL
4322 #define bcmgenet_resume_noirq   NULL
4323 #endif /* CONFIG_PM_SLEEP */
4324
4325 static const struct dev_pm_ops bcmgenet_pm_ops = {
4326         .suspend        = bcmgenet_suspend,
4327         .suspend_noirq  = bcmgenet_suspend_noirq,
4328         .resume         = bcmgenet_resume,
4329         .resume_noirq   = bcmgenet_resume_noirq,
4330 };
4331
4332 static const struct acpi_device_id genet_acpi_match[] = {
4333         { "BCM6E4E", (kernel_ulong_t)&bcm2711_plat_data },
4334         { },
4335 };
4336 MODULE_DEVICE_TABLE(acpi, genet_acpi_match);
4337
4338 static struct platform_driver bcmgenet_driver = {
4339         .probe  = bcmgenet_probe,
4340         .remove = bcmgenet_remove,
4341         .shutdown = bcmgenet_shutdown,
4342         .driver = {
4343                 .name   = "bcmgenet",
4344                 .of_match_table = bcmgenet_match,
4345                 .pm     = &bcmgenet_pm_ops,
4346                 .acpi_match_table = genet_acpi_match,
4347         },
4348 };
4349 module_platform_driver(bcmgenet_driver);
4350
4351 MODULE_AUTHOR("Broadcom Corporation");
4352 MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver");
4353 MODULE_ALIAS("platform:bcmgenet");
4354 MODULE_LICENSE("GPL");
4355 MODULE_SOFTDEP("pre: mdio-bcm-unimac");