1 /* 2 * Driver for (BCM4706)? GBit MAC core on BCMA bus. 3 * 4 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com> 5 * 6 * Licensed under the GNU/GPL. See COPYING for details. 7 */ 8 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/bcma/bcma.h> 13 #include <linux/etherdevice.h> 14 #include <linux/interrupt.h> 15 #include <linux/bcm47xx_nvram.h> 16 #include <linux/phy.h> 17 #include <linux/phy_fixed.h> 18 #include <net/dsa.h> 19 #include "bgmac.h" 20 21 static bool bgmac_wait_value(struct bgmac *bgmac, u16 reg, u32 mask, 22 u32 value, int timeout) 23 { 24 u32 val; 25 int i; 26 27 for (i = 0; i < timeout / 10; i++) { 28 val = bgmac_read(bgmac, reg); 29 if ((val & mask) == value) 30 return true; 31 udelay(10); 32 } 33 dev_err(bgmac->dev, "Timeout waiting for reg 0x%X\n", reg); 34 return false; 35 } 36 37 /************************************************** 38 * DMA 39 **************************************************/ 40 41 static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 42 { 43 u32 val; 44 int i; 45 46 if (!ring->mmio_base) 47 return; 48 49 /* Suspend DMA TX ring first. 50 * bgmac_wait_value doesn't support waiting for any of few values, so 51 * implement whole loop here. 52 */ 53 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 54 BGMAC_DMA_TX_SUSPEND); 55 for (i = 0; i < 10000 / 10; i++) { 56 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 57 val &= BGMAC_DMA_TX_STAT; 58 if (val == BGMAC_DMA_TX_STAT_DISABLED || 59 val == BGMAC_DMA_TX_STAT_IDLEWAIT || 60 val == BGMAC_DMA_TX_STAT_STOPPED) { 61 i = 0; 62 break; 63 } 64 udelay(10); 65 } 66 if (i) 67 dev_err(bgmac->dev, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n", 68 ring->mmio_base, val); 69 70 /* Remove SUSPEND bit */ 71 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0); 72 if (!bgmac_wait_value(bgmac, 73 ring->mmio_base + BGMAC_DMA_TX_STATUS, 74 BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED, 75 10000)) { 76 dev_warn(bgmac->dev, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n", 77 ring->mmio_base); 78 udelay(300); 79 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 80 if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED) 81 dev_err(bgmac->dev, "Reset of DMA TX ring 0x%X failed\n", 82 ring->mmio_base); 83 } 84 } 85 86 static void bgmac_dma_tx_enable(struct bgmac *bgmac, 87 struct bgmac_dma_ring *ring) 88 { 89 u32 ctl; 90 91 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL); 92 if (bgmac->feature_flags & BGMAC_FEAT_TX_MASK_SETUP) { 93 ctl &= ~BGMAC_DMA_TX_BL_MASK; 94 ctl |= BGMAC_DMA_TX_BL_128 << BGMAC_DMA_TX_BL_SHIFT; 95 96 ctl &= ~BGMAC_DMA_TX_MR_MASK; 97 ctl |= BGMAC_DMA_TX_MR_2 << BGMAC_DMA_TX_MR_SHIFT; 98 99 ctl &= ~BGMAC_DMA_TX_PC_MASK; 100 ctl |= BGMAC_DMA_TX_PC_16 << BGMAC_DMA_TX_PC_SHIFT; 101 102 ctl &= ~BGMAC_DMA_TX_PT_MASK; 103 ctl |= BGMAC_DMA_TX_PT_8 << BGMAC_DMA_TX_PT_SHIFT; 104 } 105 ctl |= BGMAC_DMA_TX_ENABLE; 106 ctl |= BGMAC_DMA_TX_PARITY_DISABLE; 107 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl); 108 } 109 110 static void 111 bgmac_dma_tx_add_buf(struct bgmac *bgmac, struct bgmac_dma_ring *ring, 112 int i, int len, u32 ctl0) 113 { 114 struct bgmac_slot_info *slot; 115 struct bgmac_dma_desc *dma_desc; 116 u32 ctl1; 117 118 if (i == BGMAC_TX_RING_SLOTS - 1) 119 ctl0 |= BGMAC_DESC_CTL0_EOT; 120 121 ctl1 = len & BGMAC_DESC_CTL1_LEN; 122 123 slot = &ring->slots[i]; 124 dma_desc = &ring->cpu_base[i]; 125 dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr)); 126 dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr)); 127 dma_desc->ctl0 = cpu_to_le32(ctl0); 128 dma_desc->ctl1 = cpu_to_le32(ctl1); 129 } 130 131 static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac, 132 struct bgmac_dma_ring *ring, 133 struct sk_buff *skb) 134 { 135 struct device *dma_dev = bgmac->dma_dev; 136 struct net_device *net_dev = bgmac->net_dev; 137 int index = ring->end % BGMAC_TX_RING_SLOTS; 138 struct bgmac_slot_info *slot = &ring->slots[index]; 139 int nr_frags; 140 u32 flags; 141 int i; 142 143 if (skb->len > BGMAC_DESC_CTL1_LEN) { 144 netdev_err(bgmac->net_dev, "Too long skb (%d)\n", skb->len); 145 goto err_drop; 146 } 147 148 if (skb->ip_summed == CHECKSUM_PARTIAL) 149 skb_checksum_help(skb); 150 151 nr_frags = skb_shinfo(skb)->nr_frags; 152 153 /* ring->end - ring->start will return the number of valid slots, 154 * even when ring->end overflows 155 */ 156 if (ring->end - ring->start + nr_frags + 1 >= BGMAC_TX_RING_SLOTS) { 157 netdev_err(bgmac->net_dev, "TX ring is full, queue should be stopped!\n"); 158 netif_stop_queue(net_dev); 159 return NETDEV_TX_BUSY; 160 } 161 162 slot->dma_addr = dma_map_single(dma_dev, skb->data, skb_headlen(skb), 163 DMA_TO_DEVICE); 164 if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr))) 165 goto err_dma_head; 166 167 flags = BGMAC_DESC_CTL0_SOF; 168 if (!nr_frags) 169 flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC; 170 171 bgmac_dma_tx_add_buf(bgmac, ring, index, skb_headlen(skb), flags); 172 flags = 0; 173 174 for (i = 0; i < nr_frags; i++) { 175 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 176 int len = skb_frag_size(frag); 177 178 index = (index + 1) % BGMAC_TX_RING_SLOTS; 179 slot = &ring->slots[index]; 180 slot->dma_addr = skb_frag_dma_map(dma_dev, frag, 0, 181 len, DMA_TO_DEVICE); 182 if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr))) 183 goto err_dma; 184 185 if (i == nr_frags - 1) 186 flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC; 187 188 bgmac_dma_tx_add_buf(bgmac, ring, index, len, flags); 189 } 190 191 slot->skb = skb; 192 ring->end += nr_frags + 1; 193 netdev_sent_queue(net_dev, skb->len); 194 195 wmb(); 196 197 /* Increase ring->end to point empty slot. We tell hardware the first 198 * slot it should *not* read. 199 */ 200 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX, 201 ring->index_base + 202 (ring->end % BGMAC_TX_RING_SLOTS) * 203 sizeof(struct bgmac_dma_desc)); 204 205 if (ring->end - ring->start >= BGMAC_TX_RING_SLOTS - 8) 206 netif_stop_queue(net_dev); 207 208 return NETDEV_TX_OK; 209 210 err_dma: 211 dma_unmap_single(dma_dev, slot->dma_addr, skb_headlen(skb), 212 DMA_TO_DEVICE); 213 214 while (i-- > 0) { 215 int index = (ring->end + i) % BGMAC_TX_RING_SLOTS; 216 struct bgmac_slot_info *slot = &ring->slots[index]; 217 u32 ctl1 = le32_to_cpu(ring->cpu_base[index].ctl1); 218 int len = ctl1 & BGMAC_DESC_CTL1_LEN; 219 220 dma_unmap_page(dma_dev, slot->dma_addr, len, DMA_TO_DEVICE); 221 } 222 223 err_dma_head: 224 netdev_err(bgmac->net_dev, "Mapping error of skb on ring 0x%X\n", 225 ring->mmio_base); 226 227 err_drop: 228 dev_kfree_skb(skb); 229 net_dev->stats.tx_dropped++; 230 net_dev->stats.tx_errors++; 231 return NETDEV_TX_OK; 232 } 233 234 /* Free transmitted packets */ 235 static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 236 { 237 struct device *dma_dev = bgmac->dma_dev; 238 int empty_slot; 239 unsigned bytes_compl = 0, pkts_compl = 0; 240 241 /* The last slot that hardware didn't consume yet */ 242 empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS); 243 empty_slot &= BGMAC_DMA_TX_STATDPTR; 244 empty_slot -= ring->index_base; 245 empty_slot &= BGMAC_DMA_TX_STATDPTR; 246 empty_slot /= sizeof(struct bgmac_dma_desc); 247 248 while (ring->start != ring->end) { 249 int slot_idx = ring->start % BGMAC_TX_RING_SLOTS; 250 struct bgmac_slot_info *slot = &ring->slots[slot_idx]; 251 u32 ctl0, ctl1; 252 int len; 253 254 if (slot_idx == empty_slot) 255 break; 256 257 ctl0 = le32_to_cpu(ring->cpu_base[slot_idx].ctl0); 258 ctl1 = le32_to_cpu(ring->cpu_base[slot_idx].ctl1); 259 len = ctl1 & BGMAC_DESC_CTL1_LEN; 260 if (ctl0 & BGMAC_DESC_CTL0_SOF) 261 /* Unmap no longer used buffer */ 262 dma_unmap_single(dma_dev, slot->dma_addr, len, 263 DMA_TO_DEVICE); 264 else 265 dma_unmap_page(dma_dev, slot->dma_addr, len, 266 DMA_TO_DEVICE); 267 268 if (slot->skb) { 269 bgmac->net_dev->stats.tx_bytes += slot->skb->len; 270 bgmac->net_dev->stats.tx_packets++; 271 bytes_compl += slot->skb->len; 272 pkts_compl++; 273 274 /* Free memory! :) */ 275 dev_kfree_skb(slot->skb); 276 slot->skb = NULL; 277 } 278 279 slot->dma_addr = 0; 280 ring->start++; 281 } 282 283 if (!pkts_compl) 284 return; 285 286 netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl); 287 288 if (netif_queue_stopped(bgmac->net_dev)) 289 netif_wake_queue(bgmac->net_dev); 290 } 291 292 static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring) 293 { 294 if (!ring->mmio_base) 295 return; 296 297 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0); 298 if (!bgmac_wait_value(bgmac, 299 ring->mmio_base + BGMAC_DMA_RX_STATUS, 300 BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED, 301 10000)) 302 dev_err(bgmac->dev, "Reset of ring 0x%X RX failed\n", 303 ring->mmio_base); 304 } 305 306 static void bgmac_dma_rx_enable(struct bgmac *bgmac, 307 struct bgmac_dma_ring *ring) 308 { 309 u32 ctl; 310 311 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL); 312 313 /* preserve ONLY bits 16-17 from current hardware value */ 314 ctl &= BGMAC_DMA_RX_ADDREXT_MASK; 315 316 if (bgmac->feature_flags & BGMAC_FEAT_RX_MASK_SETUP) { 317 ctl &= ~BGMAC_DMA_RX_BL_MASK; 318 ctl |= BGMAC_DMA_RX_BL_128 << BGMAC_DMA_RX_BL_SHIFT; 319 320 ctl &= ~BGMAC_DMA_RX_PC_MASK; 321 ctl |= BGMAC_DMA_RX_PC_8 << BGMAC_DMA_RX_PC_SHIFT; 322 323 ctl &= ~BGMAC_DMA_RX_PT_MASK; 324 ctl |= BGMAC_DMA_RX_PT_1 << BGMAC_DMA_RX_PT_SHIFT; 325 } 326 ctl |= BGMAC_DMA_RX_ENABLE; 327 ctl |= BGMAC_DMA_RX_PARITY_DISABLE; 328 ctl |= BGMAC_DMA_RX_OVERFLOW_CONT; 329 ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT; 330 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl); 331 } 332 333 static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac, 334 struct bgmac_slot_info *slot) 335 { 336 struct device *dma_dev = bgmac->dma_dev; 337 dma_addr_t dma_addr; 338 struct bgmac_rx_header *rx; 339 void *buf; 340 341 /* Alloc skb */ 342 buf = netdev_alloc_frag(BGMAC_RX_ALLOC_SIZE); 343 if (!buf) 344 return -ENOMEM; 345 346 /* Poison - if everything goes fine, hardware will overwrite it */ 347 rx = buf + BGMAC_RX_BUF_OFFSET; 348 rx->len = cpu_to_le16(0xdead); 349 rx->flags = cpu_to_le16(0xbeef); 350 351 /* Map skb for the DMA */ 352 dma_addr = dma_map_single(dma_dev, buf + BGMAC_RX_BUF_OFFSET, 353 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 354 if (dma_mapping_error(dma_dev, dma_addr)) { 355 netdev_err(bgmac->net_dev, "DMA mapping error\n"); 356 put_page(virt_to_head_page(buf)); 357 return -ENOMEM; 358 } 359 360 /* Update the slot */ 361 slot->buf = buf; 362 slot->dma_addr = dma_addr; 363 364 return 0; 365 } 366 367 static void bgmac_dma_rx_update_index(struct bgmac *bgmac, 368 struct bgmac_dma_ring *ring) 369 { 370 dma_wmb(); 371 372 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, 373 ring->index_base + 374 ring->end * sizeof(struct bgmac_dma_desc)); 375 } 376 377 static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac, 378 struct bgmac_dma_ring *ring, int desc_idx) 379 { 380 struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx; 381 u32 ctl0 = 0, ctl1 = 0; 382 383 if (desc_idx == BGMAC_RX_RING_SLOTS - 1) 384 ctl0 |= BGMAC_DESC_CTL0_EOT; 385 ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN; 386 /* Is there any BGMAC device that requires extension? */ 387 /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) & 388 * B43_DMA64_DCTL1_ADDREXT_MASK; 389 */ 390 391 dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[desc_idx].dma_addr)); 392 dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[desc_idx].dma_addr)); 393 dma_desc->ctl0 = cpu_to_le32(ctl0); 394 dma_desc->ctl1 = cpu_to_le32(ctl1); 395 396 ring->end = desc_idx; 397 } 398 399 static void bgmac_dma_rx_poison_buf(struct device *dma_dev, 400 struct bgmac_slot_info *slot) 401 { 402 struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET; 403 404 dma_sync_single_for_cpu(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE, 405 DMA_FROM_DEVICE); 406 rx->len = cpu_to_le16(0xdead); 407 rx->flags = cpu_to_le16(0xbeef); 408 dma_sync_single_for_device(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE, 409 DMA_FROM_DEVICE); 410 } 411 412 static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, 413 int weight) 414 { 415 u32 end_slot; 416 int handled = 0; 417 418 end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS); 419 end_slot &= BGMAC_DMA_RX_STATDPTR; 420 end_slot -= ring->index_base; 421 end_slot &= BGMAC_DMA_RX_STATDPTR; 422 end_slot /= sizeof(struct bgmac_dma_desc); 423 424 while (ring->start != end_slot) { 425 struct device *dma_dev = bgmac->dma_dev; 426 struct bgmac_slot_info *slot = &ring->slots[ring->start]; 427 struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET; 428 struct sk_buff *skb; 429 void *buf = slot->buf; 430 dma_addr_t dma_addr = slot->dma_addr; 431 u16 len, flags; 432 433 do { 434 /* Prepare new skb as replacement */ 435 if (bgmac_dma_rx_skb_for_slot(bgmac, slot)) { 436 bgmac_dma_rx_poison_buf(dma_dev, slot); 437 break; 438 } 439 440 /* Unmap buffer to make it accessible to the CPU */ 441 dma_unmap_single(dma_dev, dma_addr, 442 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); 443 444 /* Get info from the header */ 445 len = le16_to_cpu(rx->len); 446 flags = le16_to_cpu(rx->flags); 447 448 /* Check for poison and drop or pass the packet */ 449 if (len == 0xdead && flags == 0xbeef) { 450 netdev_err(bgmac->net_dev, "Found poisoned packet at slot %d, DMA issue!\n", 451 ring->start); 452 put_page(virt_to_head_page(buf)); 453 bgmac->net_dev->stats.rx_errors++; 454 break; 455 } 456 457 if (len > BGMAC_RX_ALLOC_SIZE) { 458 netdev_err(bgmac->net_dev, "Found oversized packet at slot %d, DMA issue!\n", 459 ring->start); 460 put_page(virt_to_head_page(buf)); 461 bgmac->net_dev->stats.rx_length_errors++; 462 bgmac->net_dev->stats.rx_errors++; 463 break; 464 } 465 466 /* Omit CRC. */ 467 len -= ETH_FCS_LEN; 468 469 skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE); 470 if (unlikely(!skb)) { 471 netdev_err(bgmac->net_dev, "build_skb failed\n"); 472 put_page(virt_to_head_page(buf)); 473 bgmac->net_dev->stats.rx_errors++; 474 break; 475 } 476 skb_put(skb, BGMAC_RX_FRAME_OFFSET + 477 BGMAC_RX_BUF_OFFSET + len); 478 skb_pull(skb, BGMAC_RX_FRAME_OFFSET + 479 BGMAC_RX_BUF_OFFSET); 480 481 skb_checksum_none_assert(skb); 482 skb->protocol = eth_type_trans(skb, bgmac->net_dev); 483 bgmac->net_dev->stats.rx_bytes += len; 484 bgmac->net_dev->stats.rx_packets++; 485 napi_gro_receive(&bgmac->napi, skb); 486 handled++; 487 } while (0); 488 489 bgmac_dma_rx_setup_desc(bgmac, ring, ring->start); 490 491 if (++ring->start >= BGMAC_RX_RING_SLOTS) 492 ring->start = 0; 493 494 if (handled >= weight) /* Should never be greater */ 495 break; 496 } 497 498 bgmac_dma_rx_update_index(bgmac, ring); 499 500 return handled; 501 } 502 503 /* Does ring support unaligned addressing? */ 504 static bool bgmac_dma_unaligned(struct bgmac *bgmac, 505 struct bgmac_dma_ring *ring, 506 enum bgmac_dma_ring_type ring_type) 507 { 508 switch (ring_type) { 509 case BGMAC_DMA_RING_TX: 510 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 511 0xff0); 512 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO)) 513 return true; 514 break; 515 case BGMAC_DMA_RING_RX: 516 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 517 0xff0); 518 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO)) 519 return true; 520 break; 521 } 522 return false; 523 } 524 525 static void bgmac_dma_tx_ring_free(struct bgmac *bgmac, 526 struct bgmac_dma_ring *ring) 527 { 528 struct device *dma_dev = bgmac->dma_dev; 529 struct bgmac_dma_desc *dma_desc = ring->cpu_base; 530 struct bgmac_slot_info *slot; 531 int i; 532 533 for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) { 534 u32 ctl1 = le32_to_cpu(dma_desc[i].ctl1); 535 unsigned int len = ctl1 & BGMAC_DESC_CTL1_LEN; 536 537 slot = &ring->slots[i]; 538 dev_kfree_skb(slot->skb); 539 540 if (!slot->dma_addr) 541 continue; 542 543 if (slot->skb) 544 dma_unmap_single(dma_dev, slot->dma_addr, 545 len, DMA_TO_DEVICE); 546 else 547 dma_unmap_page(dma_dev, slot->dma_addr, 548 len, DMA_TO_DEVICE); 549 } 550 } 551 552 static void bgmac_dma_rx_ring_free(struct bgmac *bgmac, 553 struct bgmac_dma_ring *ring) 554 { 555 struct device *dma_dev = bgmac->dma_dev; 556 struct bgmac_slot_info *slot; 557 int i; 558 559 for (i = 0; i < BGMAC_RX_RING_SLOTS; i++) { 560 slot = &ring->slots[i]; 561 if (!slot->dma_addr) 562 continue; 563 564 dma_unmap_single(dma_dev, slot->dma_addr, 565 BGMAC_RX_BUF_SIZE, 566 DMA_FROM_DEVICE); 567 put_page(virt_to_head_page(slot->buf)); 568 slot->dma_addr = 0; 569 } 570 } 571 572 static void bgmac_dma_ring_desc_free(struct bgmac *bgmac, 573 struct bgmac_dma_ring *ring, 574 int num_slots) 575 { 576 struct device *dma_dev = bgmac->dma_dev; 577 int size; 578 579 if (!ring->cpu_base) 580 return; 581 582 /* Free ring of descriptors */ 583 size = num_slots * sizeof(struct bgmac_dma_desc); 584 dma_free_coherent(dma_dev, size, ring->cpu_base, 585 ring->dma_base); 586 } 587 588 static void bgmac_dma_cleanup(struct bgmac *bgmac) 589 { 590 int i; 591 592 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 593 bgmac_dma_tx_ring_free(bgmac, &bgmac->tx_ring[i]); 594 595 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 596 bgmac_dma_rx_ring_free(bgmac, &bgmac->rx_ring[i]); 597 } 598 599 static void bgmac_dma_free(struct bgmac *bgmac) 600 { 601 int i; 602 603 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 604 bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i], 605 BGMAC_TX_RING_SLOTS); 606 607 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 608 bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i], 609 BGMAC_RX_RING_SLOTS); 610 } 611 612 static int bgmac_dma_alloc(struct bgmac *bgmac) 613 { 614 struct device *dma_dev = bgmac->dma_dev; 615 struct bgmac_dma_ring *ring; 616 static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1, 617 BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, }; 618 int size; /* ring size: different for Tx and Rx */ 619 int i; 620 621 BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base)); 622 BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base)); 623 624 if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) { 625 if (!(bgmac_idm_read(bgmac, BCMA_IOST) & BCMA_IOST_DMA64)) { 626 dev_err(bgmac->dev, "Core does not report 64-bit DMA\n"); 627 return -ENOTSUPP; 628 } 629 } 630 631 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 632 ring = &bgmac->tx_ring[i]; 633 ring->mmio_base = ring_base[i]; 634 635 /* Alloc ring of descriptors */ 636 size = BGMAC_TX_RING_SLOTS * sizeof(struct bgmac_dma_desc); 637 ring->cpu_base = dma_alloc_coherent(dma_dev, size, 638 &ring->dma_base, 639 GFP_KERNEL); 640 if (!ring->cpu_base) { 641 dev_err(bgmac->dev, "Allocation of TX ring 0x%X failed\n", 642 ring->mmio_base); 643 goto err_dma_free; 644 } 645 646 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, 647 BGMAC_DMA_RING_TX); 648 if (ring->unaligned) 649 ring->index_base = lower_32_bits(ring->dma_base); 650 else 651 ring->index_base = 0; 652 653 /* No need to alloc TX slots yet */ 654 } 655 656 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 657 ring = &bgmac->rx_ring[i]; 658 ring->mmio_base = ring_base[i]; 659 660 /* Alloc ring of descriptors */ 661 size = BGMAC_RX_RING_SLOTS * sizeof(struct bgmac_dma_desc); 662 ring->cpu_base = dma_alloc_coherent(dma_dev, size, 663 &ring->dma_base, 664 GFP_KERNEL); 665 if (!ring->cpu_base) { 666 dev_err(bgmac->dev, "Allocation of RX ring 0x%X failed\n", 667 ring->mmio_base); 668 goto err_dma_free; 669 } 670 671 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, 672 BGMAC_DMA_RING_RX); 673 if (ring->unaligned) 674 ring->index_base = lower_32_bits(ring->dma_base); 675 else 676 ring->index_base = 0; 677 } 678 679 return 0; 680 681 err_dma_free: 682 bgmac_dma_free(bgmac); 683 return -ENOMEM; 684 } 685 686 static int bgmac_dma_init(struct bgmac *bgmac) 687 { 688 struct bgmac_dma_ring *ring; 689 int i, err; 690 691 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { 692 ring = &bgmac->tx_ring[i]; 693 694 if (!ring->unaligned) 695 bgmac_dma_tx_enable(bgmac, ring); 696 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO, 697 lower_32_bits(ring->dma_base)); 698 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI, 699 upper_32_bits(ring->dma_base)); 700 if (ring->unaligned) 701 bgmac_dma_tx_enable(bgmac, ring); 702 703 ring->start = 0; 704 ring->end = 0; /* Points the slot that should *not* be read */ 705 } 706 707 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { 708 int j; 709 710 ring = &bgmac->rx_ring[i]; 711 712 if (!ring->unaligned) 713 bgmac_dma_rx_enable(bgmac, ring); 714 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO, 715 lower_32_bits(ring->dma_base)); 716 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI, 717 upper_32_bits(ring->dma_base)); 718 if (ring->unaligned) 719 bgmac_dma_rx_enable(bgmac, ring); 720 721 ring->start = 0; 722 ring->end = 0; 723 for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) { 724 err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]); 725 if (err) 726 goto error; 727 728 bgmac_dma_rx_setup_desc(bgmac, ring, j); 729 } 730 731 bgmac_dma_rx_update_index(bgmac, ring); 732 } 733 734 return 0; 735 736 error: 737 bgmac_dma_cleanup(bgmac); 738 return err; 739 } 740 741 742 /************************************************** 743 * Chip ops 744 **************************************************/ 745 746 /* TODO: can we just drop @force? Can we don't reset MAC at all if there is 747 * nothing to change? Try if after stabilizng driver. 748 */ 749 static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set, 750 bool force) 751 { 752 u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 753 u32 new_val = (cmdcfg & mask) | set; 754 u32 cmdcfg_sr; 755 756 if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4) 757 cmdcfg_sr = BGMAC_CMDCFG_SR_REV4; 758 else 759 cmdcfg_sr = BGMAC_CMDCFG_SR_REV0; 760 761 bgmac_set(bgmac, BGMAC_CMDCFG, cmdcfg_sr); 762 udelay(2); 763 764 if (new_val != cmdcfg || force) 765 bgmac_write(bgmac, BGMAC_CMDCFG, new_val); 766 767 bgmac_mask(bgmac, BGMAC_CMDCFG, ~cmdcfg_sr); 768 udelay(2); 769 } 770 771 static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr) 772 { 773 u32 tmp; 774 775 tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]; 776 bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp); 777 tmp = (addr[4] << 8) | addr[5]; 778 bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp); 779 } 780 781 static void bgmac_set_rx_mode(struct net_device *net_dev) 782 { 783 struct bgmac *bgmac = netdev_priv(net_dev); 784 785 if (net_dev->flags & IFF_PROMISC) 786 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true); 787 else 788 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true); 789 } 790 791 #if 0 /* We don't use that regs yet */ 792 static void bgmac_chip_stats_update(struct bgmac *bgmac) 793 { 794 int i; 795 796 if (!(bgmac->feature_flags & BGMAC_FEAT_NO_CLR_MIB)) { 797 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 798 bgmac->mib_tx_regs[i] = 799 bgmac_read(bgmac, 800 BGMAC_TX_GOOD_OCTETS + (i * 4)); 801 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 802 bgmac->mib_rx_regs[i] = 803 bgmac_read(bgmac, 804 BGMAC_RX_GOOD_OCTETS + (i * 4)); 805 } 806 807 /* TODO: what else? how to handle BCM4706? Specs are needed */ 808 } 809 #endif 810 811 static void bgmac_clear_mib(struct bgmac *bgmac) 812 { 813 int i; 814 815 if (bgmac->feature_flags & BGMAC_FEAT_NO_CLR_MIB) 816 return; 817 818 bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR); 819 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++) 820 bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4)); 821 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++) 822 bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4)); 823 } 824 825 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */ 826 static void bgmac_mac_speed(struct bgmac *bgmac) 827 { 828 u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD); 829 u32 set = 0; 830 831 switch (bgmac->mac_speed) { 832 case SPEED_10: 833 set |= BGMAC_CMDCFG_ES_10; 834 break; 835 case SPEED_100: 836 set |= BGMAC_CMDCFG_ES_100; 837 break; 838 case SPEED_1000: 839 set |= BGMAC_CMDCFG_ES_1000; 840 break; 841 case SPEED_2500: 842 set |= BGMAC_CMDCFG_ES_2500; 843 break; 844 default: 845 dev_err(bgmac->dev, "Unsupported speed: %d\n", 846 bgmac->mac_speed); 847 } 848 849 if (bgmac->mac_duplex == DUPLEX_HALF) 850 set |= BGMAC_CMDCFG_HD; 851 852 bgmac_cmdcfg_maskset(bgmac, mask, set, true); 853 } 854 855 static void bgmac_miiconfig(struct bgmac *bgmac) 856 { 857 if (bgmac->feature_flags & BGMAC_FEAT_FORCE_SPEED_2500) { 858 if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) { 859 bgmac_idm_write(bgmac, BCMA_IOCTL, 860 bgmac_idm_read(bgmac, BCMA_IOCTL) | 861 0x40 | BGMAC_BCMA_IOCTL_SW_CLKEN); 862 } 863 bgmac->mac_speed = SPEED_2500; 864 bgmac->mac_duplex = DUPLEX_FULL; 865 bgmac_mac_speed(bgmac); 866 } else { 867 u8 imode; 868 869 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & 870 BGMAC_DS_MM_MASK) >> BGMAC_DS_MM_SHIFT; 871 if (imode == 0 || imode == 1) { 872 bgmac->mac_speed = SPEED_100; 873 bgmac->mac_duplex = DUPLEX_FULL; 874 bgmac_mac_speed(bgmac); 875 } 876 } 877 } 878 879 static void bgmac_chip_reset_idm_config(struct bgmac *bgmac) 880 { 881 u32 iost; 882 883 iost = bgmac_idm_read(bgmac, BCMA_IOST); 884 if (bgmac->feature_flags & BGMAC_FEAT_IOST_ATTACHED) 885 iost &= ~BGMAC_BCMA_IOST_ATTACHED; 886 887 /* 3GMAC: for BCM4707 & BCM47094, only do core reset at bgmac_probe() */ 888 if (!(bgmac->feature_flags & BGMAC_FEAT_NO_RESET)) { 889 u32 flags = 0; 890 891 if (iost & BGMAC_BCMA_IOST_ATTACHED) { 892 flags = BGMAC_BCMA_IOCTL_SW_CLKEN; 893 if (!bgmac->has_robosw) 894 flags |= BGMAC_BCMA_IOCTL_SW_RESET; 895 } 896 bgmac_clk_enable(bgmac, flags); 897 } 898 899 if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw) 900 bgmac_idm_write(bgmac, BCMA_IOCTL, 901 bgmac_idm_read(bgmac, BCMA_IOCTL) & 902 ~BGMAC_BCMA_IOCTL_SW_RESET); 903 } 904 905 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */ 906 static void bgmac_chip_reset(struct bgmac *bgmac) 907 { 908 u32 cmdcfg_sr; 909 int i; 910 911 if (bgmac_clk_enabled(bgmac)) { 912 if (!bgmac->stats_grabbed) { 913 /* bgmac_chip_stats_update(bgmac); */ 914 bgmac->stats_grabbed = true; 915 } 916 917 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) 918 bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]); 919 920 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); 921 udelay(1); 922 923 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) 924 bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]); 925 926 /* TODO: Clear software multicast filter list */ 927 } 928 929 if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) 930 bgmac_chip_reset_idm_config(bgmac); 931 932 /* Request Misc PLL for corerev > 2 */ 933 if (bgmac->feature_flags & BGMAC_FEAT_MISC_PLL_REQ) { 934 bgmac_set(bgmac, BCMA_CLKCTLST, 935 BGMAC_BCMA_CLKCTLST_MISC_PLL_REQ); 936 bgmac_wait_value(bgmac, BCMA_CLKCTLST, 937 BGMAC_BCMA_CLKCTLST_MISC_PLL_ST, 938 BGMAC_BCMA_CLKCTLST_MISC_PLL_ST, 939 1000); 940 } 941 942 if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_PHY) { 943 u8 et_swtype = 0; 944 u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY | 945 BGMAC_CHIPCTL_1_IF_TYPE_MII; 946 char buf[4]; 947 948 if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) { 949 if (kstrtou8(buf, 0, &et_swtype)) 950 dev_err(bgmac->dev, "Failed to parse et_swtype (%s)\n", 951 buf); 952 et_swtype &= 0x0f; 953 et_swtype <<= 4; 954 sw_type = et_swtype; 955 } else if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_EPHYRMII) { 956 sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RMII | 957 BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII; 958 } else if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_RGMII) { 959 sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII | 960 BGMAC_CHIPCTL_1_SW_TYPE_RGMII; 961 } 962 bgmac_cco_ctl_maskset(bgmac, 1, ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK | 963 BGMAC_CHIPCTL_1_SW_TYPE_MASK), 964 sw_type); 965 } else if (bgmac->feature_flags & BGMAC_FEAT_CC4_IF_SW_TYPE) { 966 u32 sw_type = BGMAC_CHIPCTL_4_IF_TYPE_MII | 967 BGMAC_CHIPCTL_4_SW_TYPE_EPHY; 968 u8 et_swtype = 0; 969 char buf[4]; 970 971 if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) { 972 if (kstrtou8(buf, 0, &et_swtype)) 973 dev_err(bgmac->dev, "Failed to parse et_swtype (%s)\n", 974 buf); 975 sw_type = (et_swtype & 0x0f) << 12; 976 } else if (bgmac->feature_flags & BGMAC_FEAT_CC4_IF_SW_TYPE_RGMII) { 977 sw_type = BGMAC_CHIPCTL_4_IF_TYPE_RGMII | 978 BGMAC_CHIPCTL_4_SW_TYPE_RGMII; 979 } 980 bgmac_cco_ctl_maskset(bgmac, 4, ~(BGMAC_CHIPCTL_4_IF_TYPE_MASK | 981 BGMAC_CHIPCTL_4_SW_TYPE_MASK), 982 sw_type); 983 } else if (bgmac->feature_flags & BGMAC_FEAT_CC7_IF_TYPE_RGMII) { 984 bgmac_cco_ctl_maskset(bgmac, 7, ~BGMAC_CHIPCTL_7_IF_TYPE_MASK, 985 BGMAC_CHIPCTL_7_IF_TYPE_RGMII); 986 } 987 988 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset 989 * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine 990 * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to 991 * be keps until taking MAC out of the reset. 992 */ 993 if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4) 994 cmdcfg_sr = BGMAC_CMDCFG_SR_REV4; 995 else 996 cmdcfg_sr = BGMAC_CMDCFG_SR_REV0; 997 998 bgmac_cmdcfg_maskset(bgmac, 999 ~(BGMAC_CMDCFG_TE | 1000 BGMAC_CMDCFG_RE | 1001 BGMAC_CMDCFG_RPI | 1002 BGMAC_CMDCFG_TAI | 1003 BGMAC_CMDCFG_HD | 1004 BGMAC_CMDCFG_ML | 1005 BGMAC_CMDCFG_CFE | 1006 BGMAC_CMDCFG_RL | 1007 BGMAC_CMDCFG_RED | 1008 BGMAC_CMDCFG_PE | 1009 BGMAC_CMDCFG_TPI | 1010 BGMAC_CMDCFG_PAD_EN | 1011 BGMAC_CMDCFG_PF), 1012 BGMAC_CMDCFG_PROM | 1013 BGMAC_CMDCFG_NLC | 1014 BGMAC_CMDCFG_CFE | 1015 cmdcfg_sr, 1016 false); 1017 bgmac->mac_speed = SPEED_UNKNOWN; 1018 bgmac->mac_duplex = DUPLEX_UNKNOWN; 1019 1020 bgmac_clear_mib(bgmac); 1021 if (bgmac->feature_flags & BGMAC_FEAT_CMN_PHY_CTL) 1022 bgmac_cmn_maskset32(bgmac, BCMA_GMAC_CMN_PHY_CTL, ~0, 1023 BCMA_GMAC_CMN_PC_MTE); 1024 else 1025 bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE); 1026 bgmac_miiconfig(bgmac); 1027 if (bgmac->mii_bus) 1028 bgmac->mii_bus->reset(bgmac->mii_bus); 1029 1030 netdev_reset_queue(bgmac->net_dev); 1031 } 1032 1033 static void bgmac_chip_intrs_on(struct bgmac *bgmac) 1034 { 1035 bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask); 1036 } 1037 1038 static void bgmac_chip_intrs_off(struct bgmac *bgmac) 1039 { 1040 bgmac_write(bgmac, BGMAC_INT_MASK, 0); 1041 bgmac_read(bgmac, BGMAC_INT_MASK); 1042 } 1043 1044 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */ 1045 static void bgmac_enable(struct bgmac *bgmac) 1046 { 1047 u32 cmdcfg_sr; 1048 u32 cmdcfg; 1049 u32 mode; 1050 1051 if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4) 1052 cmdcfg_sr = BGMAC_CMDCFG_SR_REV4; 1053 else 1054 cmdcfg_sr = BGMAC_CMDCFG_SR_REV0; 1055 1056 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG); 1057 bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE), 1058 cmdcfg_sr, true); 1059 udelay(2); 1060 cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE; 1061 bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg); 1062 1063 mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >> 1064 BGMAC_DS_MM_SHIFT; 1065 if (bgmac->feature_flags & BGMAC_FEAT_CLKCTLST || mode != 0) 1066 bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT); 1067 if (!(bgmac->feature_flags & BGMAC_FEAT_CLKCTLST) && mode == 2) 1068 bgmac_cco_ctl_maskset(bgmac, 1, ~0, 1069 BGMAC_CHIPCTL_1_RXC_DLL_BYPASS); 1070 1071 if (bgmac->feature_flags & (BGMAC_FEAT_FLW_CTRL1 | 1072 BGMAC_FEAT_FLW_CTRL2)) { 1073 u32 fl_ctl; 1074 1075 if (bgmac->feature_flags & BGMAC_FEAT_FLW_CTRL1) 1076 fl_ctl = 0x2300e1; 1077 else 1078 fl_ctl = 0x03cb04cb; 1079 1080 bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl); 1081 bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff); 1082 } 1083 1084 if (bgmac->feature_flags & BGMAC_FEAT_SET_RXQ_CLK) { 1085 u32 rxq_ctl; 1086 u16 bp_clk; 1087 u8 mdp; 1088 1089 rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL); 1090 rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK; 1091 bp_clk = bgmac_get_bus_clock(bgmac) / 1000000; 1092 mdp = (bp_clk * 128 / 1000) - 3; 1093 rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT); 1094 bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl); 1095 } 1096 } 1097 1098 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */ 1099 static void bgmac_chip_init(struct bgmac *bgmac) 1100 { 1101 /* Clear any erroneously pending interrupts */ 1102 bgmac_write(bgmac, BGMAC_INT_STATUS, ~0); 1103 1104 /* 1 interrupt per received frame */ 1105 bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT); 1106 1107 /* Enable 802.3x tx flow control (honor received PAUSE frames) */ 1108 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true); 1109 1110 bgmac_set_rx_mode(bgmac->net_dev); 1111 1112 bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr); 1113 1114 if (bgmac->loopback) 1115 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false); 1116 else 1117 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false); 1118 1119 bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN); 1120 1121 bgmac_chip_intrs_on(bgmac); 1122 1123 bgmac_enable(bgmac); 1124 } 1125 1126 static irqreturn_t bgmac_interrupt(int irq, void *dev_id) 1127 { 1128 struct bgmac *bgmac = netdev_priv(dev_id); 1129 1130 u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS); 1131 int_status &= bgmac->int_mask; 1132 1133 if (!int_status) 1134 return IRQ_NONE; 1135 1136 int_status &= ~(BGMAC_IS_TX0 | BGMAC_IS_RX); 1137 if (int_status) 1138 dev_err(bgmac->dev, "Unknown IRQs: 0x%08X\n", int_status); 1139 1140 /* Disable new interrupts until handling existing ones */ 1141 bgmac_chip_intrs_off(bgmac); 1142 1143 napi_schedule(&bgmac->napi); 1144 1145 return IRQ_HANDLED; 1146 } 1147 1148 static int bgmac_poll(struct napi_struct *napi, int weight) 1149 { 1150 struct bgmac *bgmac = container_of(napi, struct bgmac, napi); 1151 int handled = 0; 1152 1153 /* Ack */ 1154 bgmac_write(bgmac, BGMAC_INT_STATUS, ~0); 1155 1156 bgmac_dma_tx_free(bgmac, &bgmac->tx_ring[0]); 1157 handled += bgmac_dma_rx_read(bgmac, &bgmac->rx_ring[0], weight); 1158 1159 /* Poll again if more events arrived in the meantime */ 1160 if (bgmac_read(bgmac, BGMAC_INT_STATUS) & (BGMAC_IS_TX0 | BGMAC_IS_RX)) 1161 return weight; 1162 1163 if (handled < weight) { 1164 napi_complete_done(napi, handled); 1165 bgmac_chip_intrs_on(bgmac); 1166 } 1167 1168 return handled; 1169 } 1170 1171 /************************************************** 1172 * net_device_ops 1173 **************************************************/ 1174 1175 static int bgmac_open(struct net_device *net_dev) 1176 { 1177 struct bgmac *bgmac = netdev_priv(net_dev); 1178 int err = 0; 1179 1180 bgmac_chip_reset(bgmac); 1181 1182 err = bgmac_dma_init(bgmac); 1183 if (err) 1184 return err; 1185 1186 /* Specs say about reclaiming rings here, but we do that in DMA init */ 1187 bgmac_chip_init(bgmac); 1188 1189 err = request_irq(bgmac->irq, bgmac_interrupt, IRQF_SHARED, 1190 net_dev->name, net_dev); 1191 if (err < 0) { 1192 dev_err(bgmac->dev, "IRQ request error: %d!\n", err); 1193 bgmac_dma_cleanup(bgmac); 1194 return err; 1195 } 1196 napi_enable(&bgmac->napi); 1197 1198 phy_start(net_dev->phydev); 1199 1200 netif_start_queue(net_dev); 1201 1202 return 0; 1203 } 1204 1205 static int bgmac_stop(struct net_device *net_dev) 1206 { 1207 struct bgmac *bgmac = netdev_priv(net_dev); 1208 1209 netif_carrier_off(net_dev); 1210 1211 phy_stop(net_dev->phydev); 1212 1213 napi_disable(&bgmac->napi); 1214 bgmac_chip_intrs_off(bgmac); 1215 free_irq(bgmac->irq, net_dev); 1216 1217 bgmac_chip_reset(bgmac); 1218 bgmac_dma_cleanup(bgmac); 1219 1220 return 0; 1221 } 1222 1223 static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb, 1224 struct net_device *net_dev) 1225 { 1226 struct bgmac *bgmac = netdev_priv(net_dev); 1227 struct bgmac_dma_ring *ring; 1228 1229 /* No QOS support yet */ 1230 ring = &bgmac->tx_ring[0]; 1231 return bgmac_dma_tx_add(bgmac, ring, skb); 1232 } 1233 1234 static int bgmac_set_mac_address(struct net_device *net_dev, void *addr) 1235 { 1236 struct bgmac *bgmac = netdev_priv(net_dev); 1237 struct sockaddr *sa = addr; 1238 int ret; 1239 1240 ret = eth_prepare_mac_addr_change(net_dev, addr); 1241 if (ret < 0) 1242 return ret; 1243 1244 ether_addr_copy(net_dev->dev_addr, sa->sa_data); 1245 bgmac_write_mac_address(bgmac, net_dev->dev_addr); 1246 1247 eth_commit_mac_addr_change(net_dev, addr); 1248 return 0; 1249 } 1250 1251 static int bgmac_change_mtu(struct net_device *net_dev, int mtu) 1252 { 1253 struct bgmac *bgmac = netdev_priv(net_dev); 1254 1255 bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + mtu); 1256 return 0; 1257 } 1258 1259 static const struct net_device_ops bgmac_netdev_ops = { 1260 .ndo_open = bgmac_open, 1261 .ndo_stop = bgmac_stop, 1262 .ndo_start_xmit = bgmac_start_xmit, 1263 .ndo_set_rx_mode = bgmac_set_rx_mode, 1264 .ndo_set_mac_address = bgmac_set_mac_address, 1265 .ndo_validate_addr = eth_validate_addr, 1266 .ndo_do_ioctl = phy_do_ioctl_running, 1267 .ndo_change_mtu = bgmac_change_mtu, 1268 }; 1269 1270 /************************************************** 1271 * ethtool_ops 1272 **************************************************/ 1273 1274 struct bgmac_stat { 1275 u8 size; 1276 u32 offset; 1277 const char *name; 1278 }; 1279 1280 static struct bgmac_stat bgmac_get_strings_stats[] = { 1281 { 8, BGMAC_TX_GOOD_OCTETS, "tx_good_octets" }, 1282 { 4, BGMAC_TX_GOOD_PKTS, "tx_good" }, 1283 { 8, BGMAC_TX_OCTETS, "tx_octets" }, 1284 { 4, BGMAC_TX_PKTS, "tx_pkts" }, 1285 { 4, BGMAC_TX_BROADCAST_PKTS, "tx_broadcast" }, 1286 { 4, BGMAC_TX_MULTICAST_PKTS, "tx_multicast" }, 1287 { 4, BGMAC_TX_LEN_64, "tx_64" }, 1288 { 4, BGMAC_TX_LEN_65_TO_127, "tx_65_127" }, 1289 { 4, BGMAC_TX_LEN_128_TO_255, "tx_128_255" }, 1290 { 4, BGMAC_TX_LEN_256_TO_511, "tx_256_511" }, 1291 { 4, BGMAC_TX_LEN_512_TO_1023, "tx_512_1023" }, 1292 { 4, BGMAC_TX_LEN_1024_TO_1522, "tx_1024_1522" }, 1293 { 4, BGMAC_TX_LEN_1523_TO_2047, "tx_1523_2047" }, 1294 { 4, BGMAC_TX_LEN_2048_TO_4095, "tx_2048_4095" }, 1295 { 4, BGMAC_TX_LEN_4096_TO_8191, "tx_4096_8191" }, 1296 { 4, BGMAC_TX_LEN_8192_TO_MAX, "tx_8192_max" }, 1297 { 4, BGMAC_TX_JABBER_PKTS, "tx_jabber" }, 1298 { 4, BGMAC_TX_OVERSIZE_PKTS, "tx_oversize" }, 1299 { 4, BGMAC_TX_FRAGMENT_PKTS, "tx_fragment" }, 1300 { 4, BGMAC_TX_UNDERRUNS, "tx_underruns" }, 1301 { 4, BGMAC_TX_TOTAL_COLS, "tx_total_cols" }, 1302 { 4, BGMAC_TX_SINGLE_COLS, "tx_single_cols" }, 1303 { 4, BGMAC_TX_MULTIPLE_COLS, "tx_multiple_cols" }, 1304 { 4, BGMAC_TX_EXCESSIVE_COLS, "tx_excessive_cols" }, 1305 { 4, BGMAC_TX_LATE_COLS, "tx_late_cols" }, 1306 { 4, BGMAC_TX_DEFERED, "tx_defered" }, 1307 { 4, BGMAC_TX_CARRIER_LOST, "tx_carrier_lost" }, 1308 { 4, BGMAC_TX_PAUSE_PKTS, "tx_pause" }, 1309 { 4, BGMAC_TX_UNI_PKTS, "tx_unicast" }, 1310 { 4, BGMAC_TX_Q0_PKTS, "tx_q0" }, 1311 { 8, BGMAC_TX_Q0_OCTETS, "tx_q0_octets" }, 1312 { 4, BGMAC_TX_Q1_PKTS, "tx_q1" }, 1313 { 8, BGMAC_TX_Q1_OCTETS, "tx_q1_octets" }, 1314 { 4, BGMAC_TX_Q2_PKTS, "tx_q2" }, 1315 { 8, BGMAC_TX_Q2_OCTETS, "tx_q2_octets" }, 1316 { 4, BGMAC_TX_Q3_PKTS, "tx_q3" }, 1317 { 8, BGMAC_TX_Q3_OCTETS, "tx_q3_octets" }, 1318 { 8, BGMAC_RX_GOOD_OCTETS, "rx_good_octets" }, 1319 { 4, BGMAC_RX_GOOD_PKTS, "rx_good" }, 1320 { 8, BGMAC_RX_OCTETS, "rx_octets" }, 1321 { 4, BGMAC_RX_PKTS, "rx_pkts" }, 1322 { 4, BGMAC_RX_BROADCAST_PKTS, "rx_broadcast" }, 1323 { 4, BGMAC_RX_MULTICAST_PKTS, "rx_multicast" }, 1324 { 4, BGMAC_RX_LEN_64, "rx_64" }, 1325 { 4, BGMAC_RX_LEN_65_TO_127, "rx_65_127" }, 1326 { 4, BGMAC_RX_LEN_128_TO_255, "rx_128_255" }, 1327 { 4, BGMAC_RX_LEN_256_TO_511, "rx_256_511" }, 1328 { 4, BGMAC_RX_LEN_512_TO_1023, "rx_512_1023" }, 1329 { 4, BGMAC_RX_LEN_1024_TO_1522, "rx_1024_1522" }, 1330 { 4, BGMAC_RX_LEN_1523_TO_2047, "rx_1523_2047" }, 1331 { 4, BGMAC_RX_LEN_2048_TO_4095, "rx_2048_4095" }, 1332 { 4, BGMAC_RX_LEN_4096_TO_8191, "rx_4096_8191" }, 1333 { 4, BGMAC_RX_LEN_8192_TO_MAX, "rx_8192_max" }, 1334 { 4, BGMAC_RX_JABBER_PKTS, "rx_jabber" }, 1335 { 4, BGMAC_RX_OVERSIZE_PKTS, "rx_oversize" }, 1336 { 4, BGMAC_RX_FRAGMENT_PKTS, "rx_fragment" }, 1337 { 4, BGMAC_RX_MISSED_PKTS, "rx_missed" }, 1338 { 4, BGMAC_RX_CRC_ALIGN_ERRS, "rx_crc_align" }, 1339 { 4, BGMAC_RX_UNDERSIZE, "rx_undersize" }, 1340 { 4, BGMAC_RX_CRC_ERRS, "rx_crc" }, 1341 { 4, BGMAC_RX_ALIGN_ERRS, "rx_align" }, 1342 { 4, BGMAC_RX_SYMBOL_ERRS, "rx_symbol" }, 1343 { 4, BGMAC_RX_PAUSE_PKTS, "rx_pause" }, 1344 { 4, BGMAC_RX_NONPAUSE_PKTS, "rx_nonpause" }, 1345 { 4, BGMAC_RX_SACHANGES, "rx_sa_changes" }, 1346 { 4, BGMAC_RX_UNI_PKTS, "rx_unicast" }, 1347 }; 1348 1349 #define BGMAC_STATS_LEN ARRAY_SIZE(bgmac_get_strings_stats) 1350 1351 static int bgmac_get_sset_count(struct net_device *dev, int string_set) 1352 { 1353 switch (string_set) { 1354 case ETH_SS_STATS: 1355 return BGMAC_STATS_LEN; 1356 } 1357 1358 return -EOPNOTSUPP; 1359 } 1360 1361 static void bgmac_get_strings(struct net_device *dev, u32 stringset, 1362 u8 *data) 1363 { 1364 int i; 1365 1366 if (stringset != ETH_SS_STATS) 1367 return; 1368 1369 for (i = 0; i < BGMAC_STATS_LEN; i++) 1370 strlcpy(data + i * ETH_GSTRING_LEN, 1371 bgmac_get_strings_stats[i].name, ETH_GSTRING_LEN); 1372 } 1373 1374 static void bgmac_get_ethtool_stats(struct net_device *dev, 1375 struct ethtool_stats *ss, uint64_t *data) 1376 { 1377 struct bgmac *bgmac = netdev_priv(dev); 1378 const struct bgmac_stat *s; 1379 unsigned int i; 1380 u64 val; 1381 1382 if (!netif_running(dev)) 1383 return; 1384 1385 for (i = 0; i < BGMAC_STATS_LEN; i++) { 1386 s = &bgmac_get_strings_stats[i]; 1387 val = 0; 1388 if (s->size == 8) 1389 val = (u64)bgmac_read(bgmac, s->offset + 4) << 32; 1390 val |= bgmac_read(bgmac, s->offset); 1391 data[i] = val; 1392 } 1393 } 1394 1395 static void bgmac_get_drvinfo(struct net_device *net_dev, 1396 struct ethtool_drvinfo *info) 1397 { 1398 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 1399 strlcpy(info->bus_info, "AXI", sizeof(info->bus_info)); 1400 } 1401 1402 static const struct ethtool_ops bgmac_ethtool_ops = { 1403 .get_strings = bgmac_get_strings, 1404 .get_sset_count = bgmac_get_sset_count, 1405 .get_ethtool_stats = bgmac_get_ethtool_stats, 1406 .get_drvinfo = bgmac_get_drvinfo, 1407 .get_link_ksettings = phy_ethtool_get_link_ksettings, 1408 .set_link_ksettings = phy_ethtool_set_link_ksettings, 1409 }; 1410 1411 /************************************************** 1412 * MII 1413 **************************************************/ 1414 1415 void bgmac_adjust_link(struct net_device *net_dev) 1416 { 1417 struct bgmac *bgmac = netdev_priv(net_dev); 1418 struct phy_device *phy_dev = net_dev->phydev; 1419 bool update = false; 1420 1421 if (phy_dev->link) { 1422 if (phy_dev->speed != bgmac->mac_speed) { 1423 bgmac->mac_speed = phy_dev->speed; 1424 update = true; 1425 } 1426 1427 if (phy_dev->duplex != bgmac->mac_duplex) { 1428 bgmac->mac_duplex = phy_dev->duplex; 1429 update = true; 1430 } 1431 } 1432 1433 if (update) { 1434 bgmac_mac_speed(bgmac); 1435 phy_print_status(phy_dev); 1436 } 1437 } 1438 EXPORT_SYMBOL_GPL(bgmac_adjust_link); 1439 1440 int bgmac_phy_connect_direct(struct bgmac *bgmac) 1441 { 1442 struct fixed_phy_status fphy_status = { 1443 .link = 1, 1444 .speed = SPEED_1000, 1445 .duplex = DUPLEX_FULL, 1446 }; 1447 struct phy_device *phy_dev; 1448 int err; 1449 1450 phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); 1451 if (!phy_dev || IS_ERR(phy_dev)) { 1452 dev_err(bgmac->dev, "Failed to register fixed PHY device\n"); 1453 return -ENODEV; 1454 } 1455 1456 err = phy_connect_direct(bgmac->net_dev, phy_dev, bgmac_adjust_link, 1457 PHY_INTERFACE_MODE_MII); 1458 if (err) { 1459 dev_err(bgmac->dev, "Connecting PHY failed\n"); 1460 return err; 1461 } 1462 1463 return err; 1464 } 1465 EXPORT_SYMBOL_GPL(bgmac_phy_connect_direct); 1466 1467 struct bgmac *bgmac_alloc(struct device *dev) 1468 { 1469 struct net_device *net_dev; 1470 struct bgmac *bgmac; 1471 1472 /* Allocation and references */ 1473 net_dev = devm_alloc_etherdev(dev, sizeof(*bgmac)); 1474 if (!net_dev) 1475 return NULL; 1476 1477 net_dev->netdev_ops = &bgmac_netdev_ops; 1478 net_dev->ethtool_ops = &bgmac_ethtool_ops; 1479 1480 bgmac = netdev_priv(net_dev); 1481 bgmac->dev = dev; 1482 bgmac->net_dev = net_dev; 1483 1484 return bgmac; 1485 } 1486 EXPORT_SYMBOL_GPL(bgmac_alloc); 1487 1488 int bgmac_enet_probe(struct bgmac *bgmac) 1489 { 1490 struct net_device *net_dev = bgmac->net_dev; 1491 int err; 1492 1493 bgmac_chip_intrs_off(bgmac); 1494 1495 net_dev->irq = bgmac->irq; 1496 SET_NETDEV_DEV(net_dev, bgmac->dev); 1497 dev_set_drvdata(bgmac->dev, bgmac); 1498 1499 if (!is_valid_ether_addr(net_dev->dev_addr)) { 1500 dev_err(bgmac->dev, "Invalid MAC addr: %pM\n", 1501 net_dev->dev_addr); 1502 eth_hw_addr_random(net_dev); 1503 dev_warn(bgmac->dev, "Using random MAC: %pM\n", 1504 net_dev->dev_addr); 1505 } 1506 1507 /* This (reset &) enable is not preset in specs or reference driver but 1508 * Broadcom does it in arch PCI code when enabling fake PCI device. 1509 */ 1510 bgmac_clk_enable(bgmac, 0); 1511 1512 /* This seems to be fixing IRQ by assigning OOB #6 to the core */ 1513 if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) { 1514 if (bgmac->feature_flags & BGMAC_FEAT_IRQ_ID_OOB_6) 1515 bgmac_idm_write(bgmac, BCMA_OOB_SEL_OUT_A30, 0x86); 1516 } 1517 1518 bgmac_chip_reset(bgmac); 1519 1520 err = bgmac_dma_alloc(bgmac); 1521 if (err) { 1522 dev_err(bgmac->dev, "Unable to alloc memory for DMA\n"); 1523 goto err_out; 1524 } 1525 1526 bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK; 1527 if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0) 1528 bgmac->int_mask &= ~BGMAC_IS_TX_MASK; 1529 1530 netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT); 1531 1532 err = bgmac_phy_connect(bgmac); 1533 if (err) { 1534 dev_err(bgmac->dev, "Cannot connect to phy\n"); 1535 goto err_dma_free; 1536 } 1537 1538 net_dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1539 net_dev->hw_features = net_dev->features; 1540 net_dev->vlan_features = net_dev->features; 1541 1542 /* Omit FCS from max MTU size */ 1543 net_dev->max_mtu = BGMAC_RX_MAX_FRAME_SIZE - ETH_FCS_LEN; 1544 1545 err = register_netdev(bgmac->net_dev); 1546 if (err) { 1547 dev_err(bgmac->dev, "Cannot register net device\n"); 1548 goto err_phy_disconnect; 1549 } 1550 1551 netif_carrier_off(net_dev); 1552 1553 return 0; 1554 1555 err_phy_disconnect: 1556 phy_disconnect(net_dev->phydev); 1557 err_dma_free: 1558 bgmac_dma_free(bgmac); 1559 err_out: 1560 1561 return err; 1562 } 1563 EXPORT_SYMBOL_GPL(bgmac_enet_probe); 1564 1565 void bgmac_enet_remove(struct bgmac *bgmac) 1566 { 1567 unregister_netdev(bgmac->net_dev); 1568 phy_disconnect(bgmac->net_dev->phydev); 1569 netif_napi_del(&bgmac->napi); 1570 bgmac_dma_free(bgmac); 1571 free_netdev(bgmac->net_dev); 1572 } 1573 EXPORT_SYMBOL_GPL(bgmac_enet_remove); 1574 1575 int bgmac_enet_suspend(struct bgmac *bgmac) 1576 { 1577 if (!netif_running(bgmac->net_dev)) 1578 return 0; 1579 1580 phy_stop(bgmac->net_dev->phydev); 1581 1582 netif_stop_queue(bgmac->net_dev); 1583 1584 napi_disable(&bgmac->napi); 1585 1586 netif_tx_lock(bgmac->net_dev); 1587 netif_device_detach(bgmac->net_dev); 1588 netif_tx_unlock(bgmac->net_dev); 1589 1590 bgmac_chip_intrs_off(bgmac); 1591 bgmac_chip_reset(bgmac); 1592 bgmac_dma_cleanup(bgmac); 1593 1594 return 0; 1595 } 1596 EXPORT_SYMBOL_GPL(bgmac_enet_suspend); 1597 1598 int bgmac_enet_resume(struct bgmac *bgmac) 1599 { 1600 int rc; 1601 1602 if (!netif_running(bgmac->net_dev)) 1603 return 0; 1604 1605 rc = bgmac_dma_init(bgmac); 1606 if (rc) 1607 return rc; 1608 1609 bgmac_chip_init(bgmac); 1610 1611 napi_enable(&bgmac->napi); 1612 1613 netif_tx_lock(bgmac->net_dev); 1614 netif_device_attach(bgmac->net_dev); 1615 netif_tx_unlock(bgmac->net_dev); 1616 1617 netif_start_queue(bgmac->net_dev); 1618 1619 phy_start(bgmac->net_dev->phydev); 1620 1621 return 0; 1622 } 1623 EXPORT_SYMBOL_GPL(bgmac_enet_resume); 1624 1625 MODULE_AUTHOR("Rafał Miłecki"); 1626 MODULE_LICENSE("GPL"); 1627