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