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"); 4356