1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for Marvell PPv2 network controller for Armada 375 SoC. 4 * 5 * Copyright (C) 2014 Marvell 6 * 7 * Marcin Wojtas <mw@semihalf.com> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/kernel.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/platform_device.h> 15 #include <linux/skbuff.h> 16 #include <linux/inetdevice.h> 17 #include <linux/mbus.h> 18 #include <linux/module.h> 19 #include <linux/mfd/syscon.h> 20 #include <linux/interrupt.h> 21 #include <linux/cpumask.h> 22 #include <linux/of.h> 23 #include <linux/of_irq.h> 24 #include <linux/of_mdio.h> 25 #include <linux/of_net.h> 26 #include <linux/of_address.h> 27 #include <linux/of_device.h> 28 #include <linux/phy.h> 29 #include <linux/phylink.h> 30 #include <linux/phy/phy.h> 31 #include <linux/clk.h> 32 #include <linux/hrtimer.h> 33 #include <linux/ktime.h> 34 #include <linux/regmap.h> 35 #include <uapi/linux/ppp_defs.h> 36 #include <net/ip.h> 37 #include <net/ipv6.h> 38 #include <net/tso.h> 39 40 #include "mvpp2.h" 41 #include "mvpp2_prs.h" 42 #include "mvpp2_cls.h" 43 44 enum mvpp2_bm_pool_log_num { 45 MVPP2_BM_SHORT, 46 MVPP2_BM_LONG, 47 MVPP2_BM_JUMBO, 48 MVPP2_BM_POOLS_NUM 49 }; 50 51 static struct { 52 int pkt_size; 53 int buf_num; 54 } mvpp2_pools[MVPP2_BM_POOLS_NUM]; 55 56 /* The prototype is added here to be used in start_dev when using ACPI. This 57 * will be removed once phylink is used for all modes (dt+ACPI). 58 */ 59 static void mvpp2_mac_config(struct net_device *dev, unsigned int mode, 60 const struct phylink_link_state *state); 61 static void mvpp2_mac_link_up(struct net_device *dev, unsigned int mode, 62 phy_interface_t interface, struct phy_device *phy); 63 64 /* Queue modes */ 65 #define MVPP2_QDIST_SINGLE_MODE 0 66 #define MVPP2_QDIST_MULTI_MODE 1 67 68 static int queue_mode = MVPP2_QDIST_MULTI_MODE; 69 70 module_param(queue_mode, int, 0444); 71 MODULE_PARM_DESC(queue_mode, "Set queue_mode (single=0, multi=1)"); 72 73 /* Utility/helper methods */ 74 75 void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data) 76 { 77 writel(data, priv->swth_base[0] + offset); 78 } 79 80 u32 mvpp2_read(struct mvpp2 *priv, u32 offset) 81 { 82 return readl(priv->swth_base[0] + offset); 83 } 84 85 u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset) 86 { 87 return readl_relaxed(priv->swth_base[0] + offset); 88 } 89 /* These accessors should be used to access: 90 * 91 * - per-CPU registers, where each CPU has its own copy of the 92 * register. 93 * 94 * MVPP2_BM_VIRT_ALLOC_REG 95 * MVPP2_BM_ADDR_HIGH_ALLOC 96 * MVPP22_BM_ADDR_HIGH_RLS_REG 97 * MVPP2_BM_VIRT_RLS_REG 98 * MVPP2_ISR_RX_TX_CAUSE_REG 99 * MVPP2_ISR_RX_TX_MASK_REG 100 * MVPP2_TXQ_NUM_REG 101 * MVPP2_AGGR_TXQ_UPDATE_REG 102 * MVPP2_TXQ_RSVD_REQ_REG 103 * MVPP2_TXQ_RSVD_RSLT_REG 104 * MVPP2_TXQ_SENT_REG 105 * MVPP2_RXQ_NUM_REG 106 * 107 * - global registers that must be accessed through a specific CPU 108 * window, because they are related to an access to a per-CPU 109 * register 110 * 111 * MVPP2_BM_PHY_ALLOC_REG (related to MVPP2_BM_VIRT_ALLOC_REG) 112 * MVPP2_BM_PHY_RLS_REG (related to MVPP2_BM_VIRT_RLS_REG) 113 * MVPP2_RXQ_THRESH_REG (related to MVPP2_RXQ_NUM_REG) 114 * MVPP2_RXQ_DESC_ADDR_REG (related to MVPP2_RXQ_NUM_REG) 115 * MVPP2_RXQ_DESC_SIZE_REG (related to MVPP2_RXQ_NUM_REG) 116 * MVPP2_RXQ_INDEX_REG (related to MVPP2_RXQ_NUM_REG) 117 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 118 * MVPP2_TXQ_DESC_ADDR_REG (related to MVPP2_TXQ_NUM_REG) 119 * MVPP2_TXQ_DESC_SIZE_REG (related to MVPP2_TXQ_NUM_REG) 120 * MVPP2_TXQ_INDEX_REG (related to MVPP2_TXQ_NUM_REG) 121 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 122 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 123 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 124 */ 125 void mvpp2_percpu_write(struct mvpp2 *priv, int cpu, 126 u32 offset, u32 data) 127 { 128 writel(data, priv->swth_base[cpu] + offset); 129 } 130 131 u32 mvpp2_percpu_read(struct mvpp2 *priv, int cpu, 132 u32 offset) 133 { 134 return readl(priv->swth_base[cpu] + offset); 135 } 136 137 void mvpp2_percpu_write_relaxed(struct mvpp2 *priv, int cpu, 138 u32 offset, u32 data) 139 { 140 writel_relaxed(data, priv->swth_base[cpu] + offset); 141 } 142 143 static u32 mvpp2_percpu_read_relaxed(struct mvpp2 *priv, int cpu, 144 u32 offset) 145 { 146 return readl_relaxed(priv->swth_base[cpu] + offset); 147 } 148 149 static dma_addr_t mvpp2_txdesc_dma_addr_get(struct mvpp2_port *port, 150 struct mvpp2_tx_desc *tx_desc) 151 { 152 if (port->priv->hw_version == MVPP21) 153 return le32_to_cpu(tx_desc->pp21.buf_dma_addr); 154 else 155 return le64_to_cpu(tx_desc->pp22.buf_dma_addr_ptp) & 156 MVPP2_DESC_DMA_MASK; 157 } 158 159 static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port, 160 struct mvpp2_tx_desc *tx_desc, 161 dma_addr_t dma_addr) 162 { 163 dma_addr_t addr, offset; 164 165 addr = dma_addr & ~MVPP2_TX_DESC_ALIGN; 166 offset = dma_addr & MVPP2_TX_DESC_ALIGN; 167 168 if (port->priv->hw_version == MVPP21) { 169 tx_desc->pp21.buf_dma_addr = cpu_to_le32(addr); 170 tx_desc->pp21.packet_offset = offset; 171 } else { 172 __le64 val = cpu_to_le64(addr); 173 174 tx_desc->pp22.buf_dma_addr_ptp &= ~cpu_to_le64(MVPP2_DESC_DMA_MASK); 175 tx_desc->pp22.buf_dma_addr_ptp |= val; 176 tx_desc->pp22.packet_offset = offset; 177 } 178 } 179 180 static size_t mvpp2_txdesc_size_get(struct mvpp2_port *port, 181 struct mvpp2_tx_desc *tx_desc) 182 { 183 if (port->priv->hw_version == MVPP21) 184 return le16_to_cpu(tx_desc->pp21.data_size); 185 else 186 return le16_to_cpu(tx_desc->pp22.data_size); 187 } 188 189 static void mvpp2_txdesc_size_set(struct mvpp2_port *port, 190 struct mvpp2_tx_desc *tx_desc, 191 size_t size) 192 { 193 if (port->priv->hw_version == MVPP21) 194 tx_desc->pp21.data_size = cpu_to_le16(size); 195 else 196 tx_desc->pp22.data_size = cpu_to_le16(size); 197 } 198 199 static void mvpp2_txdesc_txq_set(struct mvpp2_port *port, 200 struct mvpp2_tx_desc *tx_desc, 201 unsigned int txq) 202 { 203 if (port->priv->hw_version == MVPP21) 204 tx_desc->pp21.phys_txq = txq; 205 else 206 tx_desc->pp22.phys_txq = txq; 207 } 208 209 static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port, 210 struct mvpp2_tx_desc *tx_desc, 211 unsigned int command) 212 { 213 if (port->priv->hw_version == MVPP21) 214 tx_desc->pp21.command = cpu_to_le32(command); 215 else 216 tx_desc->pp22.command = cpu_to_le32(command); 217 } 218 219 static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port, 220 struct mvpp2_tx_desc *tx_desc) 221 { 222 if (port->priv->hw_version == MVPP21) 223 return tx_desc->pp21.packet_offset; 224 else 225 return tx_desc->pp22.packet_offset; 226 } 227 228 static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port, 229 struct mvpp2_rx_desc *rx_desc) 230 { 231 if (port->priv->hw_version == MVPP21) 232 return le32_to_cpu(rx_desc->pp21.buf_dma_addr); 233 else 234 return le64_to_cpu(rx_desc->pp22.buf_dma_addr_key_hash) & 235 MVPP2_DESC_DMA_MASK; 236 } 237 238 static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port, 239 struct mvpp2_rx_desc *rx_desc) 240 { 241 if (port->priv->hw_version == MVPP21) 242 return le32_to_cpu(rx_desc->pp21.buf_cookie); 243 else 244 return le64_to_cpu(rx_desc->pp22.buf_cookie_misc) & 245 MVPP2_DESC_DMA_MASK; 246 } 247 248 static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port, 249 struct mvpp2_rx_desc *rx_desc) 250 { 251 if (port->priv->hw_version == MVPP21) 252 return le16_to_cpu(rx_desc->pp21.data_size); 253 else 254 return le16_to_cpu(rx_desc->pp22.data_size); 255 } 256 257 static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port, 258 struct mvpp2_rx_desc *rx_desc) 259 { 260 if (port->priv->hw_version == MVPP21) 261 return le32_to_cpu(rx_desc->pp21.status); 262 else 263 return le32_to_cpu(rx_desc->pp22.status); 264 } 265 266 static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu) 267 { 268 txq_pcpu->txq_get_index++; 269 if (txq_pcpu->txq_get_index == txq_pcpu->size) 270 txq_pcpu->txq_get_index = 0; 271 } 272 273 static void mvpp2_txq_inc_put(struct mvpp2_port *port, 274 struct mvpp2_txq_pcpu *txq_pcpu, 275 struct sk_buff *skb, 276 struct mvpp2_tx_desc *tx_desc) 277 { 278 struct mvpp2_txq_pcpu_buf *tx_buf = 279 txq_pcpu->buffs + txq_pcpu->txq_put_index; 280 tx_buf->skb = skb; 281 tx_buf->size = mvpp2_txdesc_size_get(port, tx_desc); 282 tx_buf->dma = mvpp2_txdesc_dma_addr_get(port, tx_desc) + 283 mvpp2_txdesc_offset_get(port, tx_desc); 284 txq_pcpu->txq_put_index++; 285 if (txq_pcpu->txq_put_index == txq_pcpu->size) 286 txq_pcpu->txq_put_index = 0; 287 } 288 289 /* Get number of physical egress port */ 290 static inline int mvpp2_egress_port(struct mvpp2_port *port) 291 { 292 return MVPP2_MAX_TCONT + port->id; 293 } 294 295 /* Get number of physical TXQ */ 296 static inline int mvpp2_txq_phys(int port, int txq) 297 { 298 return (MVPP2_MAX_TCONT + port) * MVPP2_MAX_TXQ + txq; 299 } 300 301 static void *mvpp2_frag_alloc(const struct mvpp2_bm_pool *pool) 302 { 303 if (likely(pool->frag_size <= PAGE_SIZE)) 304 return netdev_alloc_frag(pool->frag_size); 305 else 306 return kmalloc(pool->frag_size, GFP_ATOMIC); 307 } 308 309 static void mvpp2_frag_free(const struct mvpp2_bm_pool *pool, void *data) 310 { 311 if (likely(pool->frag_size <= PAGE_SIZE)) 312 skb_free_frag(data); 313 else 314 kfree(data); 315 } 316 317 /* Buffer Manager configuration routines */ 318 319 /* Create pool */ 320 static int mvpp2_bm_pool_create(struct platform_device *pdev, 321 struct mvpp2 *priv, 322 struct mvpp2_bm_pool *bm_pool, int size) 323 { 324 u32 val; 325 326 /* Number of buffer pointers must be a multiple of 16, as per 327 * hardware constraints 328 */ 329 if (!IS_ALIGNED(size, 16)) 330 return -EINVAL; 331 332 /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 needs 16 333 * bytes per buffer pointer 334 */ 335 if (priv->hw_version == MVPP21) 336 bm_pool->size_bytes = 2 * sizeof(u32) * size; 337 else 338 bm_pool->size_bytes = 2 * sizeof(u64) * size; 339 340 bm_pool->virt_addr = dma_alloc_coherent(&pdev->dev, bm_pool->size_bytes, 341 &bm_pool->dma_addr, 342 GFP_KERNEL); 343 if (!bm_pool->virt_addr) 344 return -ENOMEM; 345 346 if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr, 347 MVPP2_BM_POOL_PTR_ALIGN)) { 348 dma_free_coherent(&pdev->dev, bm_pool->size_bytes, 349 bm_pool->virt_addr, bm_pool->dma_addr); 350 dev_err(&pdev->dev, "BM pool %d is not %d bytes aligned\n", 351 bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN); 352 return -ENOMEM; 353 } 354 355 mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id), 356 lower_32_bits(bm_pool->dma_addr)); 357 mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size); 358 359 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 360 val |= MVPP2_BM_START_MASK; 361 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 362 363 bm_pool->size = size; 364 bm_pool->pkt_size = 0; 365 bm_pool->buf_num = 0; 366 367 return 0; 368 } 369 370 /* Set pool buffer size */ 371 static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv, 372 struct mvpp2_bm_pool *bm_pool, 373 int buf_size) 374 { 375 u32 val; 376 377 bm_pool->buf_size = buf_size; 378 379 val = ALIGN(buf_size, 1 << MVPP2_POOL_BUF_SIZE_OFFSET); 380 mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val); 381 } 382 383 static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv, 384 struct mvpp2_bm_pool *bm_pool, 385 dma_addr_t *dma_addr, 386 phys_addr_t *phys_addr) 387 { 388 int cpu = get_cpu(); 389 390 *dma_addr = mvpp2_percpu_read(priv, cpu, 391 MVPP2_BM_PHY_ALLOC_REG(bm_pool->id)); 392 *phys_addr = mvpp2_percpu_read(priv, cpu, MVPP2_BM_VIRT_ALLOC_REG); 393 394 if (priv->hw_version == MVPP22) { 395 u32 val; 396 u32 dma_addr_highbits, phys_addr_highbits; 397 398 val = mvpp2_percpu_read(priv, cpu, MVPP22_BM_ADDR_HIGH_ALLOC); 399 dma_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_PHYS_MASK); 400 phys_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_VIRT_MASK) >> 401 MVPP22_BM_ADDR_HIGH_VIRT_SHIFT; 402 403 if (sizeof(dma_addr_t) == 8) 404 *dma_addr |= (u64)dma_addr_highbits << 32; 405 406 if (sizeof(phys_addr_t) == 8) 407 *phys_addr |= (u64)phys_addr_highbits << 32; 408 } 409 410 put_cpu(); 411 } 412 413 /* Free all buffers from the pool */ 414 static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv, 415 struct mvpp2_bm_pool *bm_pool, int buf_num) 416 { 417 int i; 418 419 if (buf_num > bm_pool->buf_num) { 420 WARN(1, "Pool does not have so many bufs pool(%d) bufs(%d)\n", 421 bm_pool->id, buf_num); 422 buf_num = bm_pool->buf_num; 423 } 424 425 for (i = 0; i < buf_num; i++) { 426 dma_addr_t buf_dma_addr; 427 phys_addr_t buf_phys_addr; 428 void *data; 429 430 mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool, 431 &buf_dma_addr, &buf_phys_addr); 432 433 dma_unmap_single(dev, buf_dma_addr, 434 bm_pool->buf_size, DMA_FROM_DEVICE); 435 436 data = (void *)phys_to_virt(buf_phys_addr); 437 if (!data) 438 break; 439 440 mvpp2_frag_free(bm_pool, data); 441 } 442 443 /* Update BM driver with number of buffers removed from pool */ 444 bm_pool->buf_num -= i; 445 } 446 447 /* Check number of buffers in BM pool */ 448 static int mvpp2_check_hw_buf_num(struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool) 449 { 450 int buf_num = 0; 451 452 buf_num += mvpp2_read(priv, MVPP2_BM_POOL_PTRS_NUM_REG(bm_pool->id)) & 453 MVPP22_BM_POOL_PTRS_NUM_MASK; 454 buf_num += mvpp2_read(priv, MVPP2_BM_BPPI_PTRS_NUM_REG(bm_pool->id)) & 455 MVPP2_BM_BPPI_PTR_NUM_MASK; 456 457 /* HW has one buffer ready which is not reflected in the counters */ 458 if (buf_num) 459 buf_num += 1; 460 461 return buf_num; 462 } 463 464 /* Cleanup pool */ 465 static int mvpp2_bm_pool_destroy(struct platform_device *pdev, 466 struct mvpp2 *priv, 467 struct mvpp2_bm_pool *bm_pool) 468 { 469 int buf_num; 470 u32 val; 471 472 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 473 mvpp2_bm_bufs_free(&pdev->dev, priv, bm_pool, buf_num); 474 475 /* Check buffer counters after free */ 476 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 477 if (buf_num) { 478 WARN(1, "cannot free all buffers in pool %d, buf_num left %d\n", 479 bm_pool->id, bm_pool->buf_num); 480 return 0; 481 } 482 483 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 484 val |= MVPP2_BM_STOP_MASK; 485 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 486 487 dma_free_coherent(&pdev->dev, bm_pool->size_bytes, 488 bm_pool->virt_addr, 489 bm_pool->dma_addr); 490 return 0; 491 } 492 493 static int mvpp2_bm_pools_init(struct platform_device *pdev, 494 struct mvpp2 *priv) 495 { 496 int i, err, size; 497 struct mvpp2_bm_pool *bm_pool; 498 499 /* Create all pools with maximum size */ 500 size = MVPP2_BM_POOL_SIZE_MAX; 501 for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) { 502 bm_pool = &priv->bm_pools[i]; 503 bm_pool->id = i; 504 err = mvpp2_bm_pool_create(pdev, priv, bm_pool, size); 505 if (err) 506 goto err_unroll_pools; 507 mvpp2_bm_pool_bufsize_set(priv, bm_pool, 0); 508 } 509 return 0; 510 511 err_unroll_pools: 512 dev_err(&pdev->dev, "failed to create BM pool %d, size %d\n", i, size); 513 for (i = i - 1; i >= 0; i--) 514 mvpp2_bm_pool_destroy(pdev, priv, &priv->bm_pools[i]); 515 return err; 516 } 517 518 static int mvpp2_bm_init(struct platform_device *pdev, struct mvpp2 *priv) 519 { 520 int i, err; 521 522 for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) { 523 /* Mask BM all interrupts */ 524 mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0); 525 /* Clear BM cause register */ 526 mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0); 527 } 528 529 /* Allocate and initialize BM pools */ 530 priv->bm_pools = devm_kcalloc(&pdev->dev, MVPP2_BM_POOLS_NUM, 531 sizeof(*priv->bm_pools), GFP_KERNEL); 532 if (!priv->bm_pools) 533 return -ENOMEM; 534 535 err = mvpp2_bm_pools_init(pdev, priv); 536 if (err < 0) 537 return err; 538 return 0; 539 } 540 541 static void mvpp2_setup_bm_pool(void) 542 { 543 /* Short pool */ 544 mvpp2_pools[MVPP2_BM_SHORT].buf_num = MVPP2_BM_SHORT_BUF_NUM; 545 mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE; 546 547 /* Long pool */ 548 mvpp2_pools[MVPP2_BM_LONG].buf_num = MVPP2_BM_LONG_BUF_NUM; 549 mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE; 550 551 /* Jumbo pool */ 552 mvpp2_pools[MVPP2_BM_JUMBO].buf_num = MVPP2_BM_JUMBO_BUF_NUM; 553 mvpp2_pools[MVPP2_BM_JUMBO].pkt_size = MVPP2_BM_JUMBO_PKT_SIZE; 554 } 555 556 /* Attach long pool to rxq */ 557 static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port, 558 int lrxq, int long_pool) 559 { 560 u32 val, mask; 561 int prxq; 562 563 /* Get queue physical ID */ 564 prxq = port->rxqs[lrxq]->id; 565 566 if (port->priv->hw_version == MVPP21) 567 mask = MVPP21_RXQ_POOL_LONG_MASK; 568 else 569 mask = MVPP22_RXQ_POOL_LONG_MASK; 570 571 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 572 val &= ~mask; 573 val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask; 574 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 575 } 576 577 /* Attach short pool to rxq */ 578 static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port, 579 int lrxq, int short_pool) 580 { 581 u32 val, mask; 582 int prxq; 583 584 /* Get queue physical ID */ 585 prxq = port->rxqs[lrxq]->id; 586 587 if (port->priv->hw_version == MVPP21) 588 mask = MVPP21_RXQ_POOL_SHORT_MASK; 589 else 590 mask = MVPP22_RXQ_POOL_SHORT_MASK; 591 592 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 593 val &= ~mask; 594 val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask; 595 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 596 } 597 598 static void *mvpp2_buf_alloc(struct mvpp2_port *port, 599 struct mvpp2_bm_pool *bm_pool, 600 dma_addr_t *buf_dma_addr, 601 phys_addr_t *buf_phys_addr, 602 gfp_t gfp_mask) 603 { 604 dma_addr_t dma_addr; 605 void *data; 606 607 data = mvpp2_frag_alloc(bm_pool); 608 if (!data) 609 return NULL; 610 611 dma_addr = dma_map_single(port->dev->dev.parent, data, 612 MVPP2_RX_BUF_SIZE(bm_pool->pkt_size), 613 DMA_FROM_DEVICE); 614 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 615 mvpp2_frag_free(bm_pool, data); 616 return NULL; 617 } 618 *buf_dma_addr = dma_addr; 619 *buf_phys_addr = virt_to_phys(data); 620 621 return data; 622 } 623 624 /* Release buffer to BM */ 625 static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, 626 dma_addr_t buf_dma_addr, 627 phys_addr_t buf_phys_addr) 628 { 629 int cpu = get_cpu(); 630 631 if (port->priv->hw_version == MVPP22) { 632 u32 val = 0; 633 634 if (sizeof(dma_addr_t) == 8) 635 val |= upper_32_bits(buf_dma_addr) & 636 MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK; 637 638 if (sizeof(phys_addr_t) == 8) 639 val |= (upper_32_bits(buf_phys_addr) 640 << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) & 641 MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK; 642 643 mvpp2_percpu_write_relaxed(port->priv, cpu, 644 MVPP22_BM_ADDR_HIGH_RLS_REG, val); 645 } 646 647 /* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply 648 * returned in the "cookie" field of the RX 649 * descriptor. Instead of storing the virtual address, we 650 * store the physical address 651 */ 652 mvpp2_percpu_write_relaxed(port->priv, cpu, 653 MVPP2_BM_VIRT_RLS_REG, buf_phys_addr); 654 mvpp2_percpu_write_relaxed(port->priv, cpu, 655 MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr); 656 657 put_cpu(); 658 } 659 660 /* Allocate buffers for the pool */ 661 static int mvpp2_bm_bufs_add(struct mvpp2_port *port, 662 struct mvpp2_bm_pool *bm_pool, int buf_num) 663 { 664 int i, buf_size, total_size; 665 dma_addr_t dma_addr; 666 phys_addr_t phys_addr; 667 void *buf; 668 669 buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size); 670 total_size = MVPP2_RX_TOTAL_SIZE(buf_size); 671 672 if (buf_num < 0 || 673 (buf_num + bm_pool->buf_num > bm_pool->size)) { 674 netdev_err(port->dev, 675 "cannot allocate %d buffers for pool %d\n", 676 buf_num, bm_pool->id); 677 return 0; 678 } 679 680 for (i = 0; i < buf_num; i++) { 681 buf = mvpp2_buf_alloc(port, bm_pool, &dma_addr, 682 &phys_addr, GFP_KERNEL); 683 if (!buf) 684 break; 685 686 mvpp2_bm_pool_put(port, bm_pool->id, dma_addr, 687 phys_addr); 688 } 689 690 /* Update BM driver with number of buffers added to pool */ 691 bm_pool->buf_num += i; 692 693 netdev_dbg(port->dev, 694 "pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n", 695 bm_pool->id, bm_pool->pkt_size, buf_size, total_size); 696 697 netdev_dbg(port->dev, 698 "pool %d: %d of %d buffers added\n", 699 bm_pool->id, i, buf_num); 700 return i; 701 } 702 703 /* Notify the driver that BM pool is being used as specific type and return the 704 * pool pointer on success 705 */ 706 static struct mvpp2_bm_pool * 707 mvpp2_bm_pool_use(struct mvpp2_port *port, unsigned pool, int pkt_size) 708 { 709 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 710 int num; 711 712 if (pool >= MVPP2_BM_POOLS_NUM) { 713 netdev_err(port->dev, "Invalid pool %d\n", pool); 714 return NULL; 715 } 716 717 /* Allocate buffers in case BM pool is used as long pool, but packet 718 * size doesn't match MTU or BM pool hasn't being used yet 719 */ 720 if (new_pool->pkt_size == 0) { 721 int pkts_num; 722 723 /* Set default buffer number or free all the buffers in case 724 * the pool is not empty 725 */ 726 pkts_num = new_pool->buf_num; 727 if (pkts_num == 0) 728 pkts_num = mvpp2_pools[pool].buf_num; 729 else 730 mvpp2_bm_bufs_free(port->dev->dev.parent, 731 port->priv, new_pool, pkts_num); 732 733 new_pool->pkt_size = pkt_size; 734 new_pool->frag_size = 735 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 736 MVPP2_SKB_SHINFO_SIZE; 737 738 /* Allocate buffers for this pool */ 739 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 740 if (num != pkts_num) { 741 WARN(1, "pool %d: %d of %d allocated\n", 742 new_pool->id, num, pkts_num); 743 return NULL; 744 } 745 } 746 747 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 748 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 749 750 return new_pool; 751 } 752 753 /* Initialize pools for swf */ 754 static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port) 755 { 756 int rxq; 757 enum mvpp2_bm_pool_log_num long_log_pool, short_log_pool; 758 759 /* If port pkt_size is higher than 1518B: 760 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 761 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 762 */ 763 if (port->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 764 long_log_pool = MVPP2_BM_JUMBO; 765 short_log_pool = MVPP2_BM_LONG; 766 } else { 767 long_log_pool = MVPP2_BM_LONG; 768 short_log_pool = MVPP2_BM_SHORT; 769 } 770 771 if (!port->pool_long) { 772 port->pool_long = 773 mvpp2_bm_pool_use(port, long_log_pool, 774 mvpp2_pools[long_log_pool].pkt_size); 775 if (!port->pool_long) 776 return -ENOMEM; 777 778 port->pool_long->port_map |= BIT(port->id); 779 780 for (rxq = 0; rxq < port->nrxqs; rxq++) 781 mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id); 782 } 783 784 if (!port->pool_short) { 785 port->pool_short = 786 mvpp2_bm_pool_use(port, short_log_pool, 787 mvpp2_pools[short_log_pool].pkt_size); 788 if (!port->pool_short) 789 return -ENOMEM; 790 791 port->pool_short->port_map |= BIT(port->id); 792 793 for (rxq = 0; rxq < port->nrxqs; rxq++) 794 mvpp2_rxq_short_pool_set(port, rxq, 795 port->pool_short->id); 796 } 797 798 return 0; 799 } 800 801 static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) 802 { 803 struct mvpp2_port *port = netdev_priv(dev); 804 enum mvpp2_bm_pool_log_num new_long_pool; 805 int pkt_size = MVPP2_RX_PKT_SIZE(mtu); 806 807 /* If port MTU is higher than 1518B: 808 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 809 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 810 */ 811 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 812 new_long_pool = MVPP2_BM_JUMBO; 813 else 814 new_long_pool = MVPP2_BM_LONG; 815 816 if (new_long_pool != port->pool_long->id) { 817 /* Remove port from old short & long pool */ 818 port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id, 819 port->pool_long->pkt_size); 820 port->pool_long->port_map &= ~BIT(port->id); 821 port->pool_long = NULL; 822 823 port->pool_short = mvpp2_bm_pool_use(port, port->pool_short->id, 824 port->pool_short->pkt_size); 825 port->pool_short->port_map &= ~BIT(port->id); 826 port->pool_short = NULL; 827 828 port->pkt_size = pkt_size; 829 830 /* Add port to new short & long pool */ 831 mvpp2_swf_bm_pool_init(port); 832 833 /* Update L4 checksum when jumbo enable/disable on port */ 834 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 835 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); 836 dev->hw_features &= ~(NETIF_F_IP_CSUM | 837 NETIF_F_IPV6_CSUM); 838 } else { 839 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 840 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 841 } 842 } 843 844 dev->mtu = mtu; 845 dev->wanted_features = dev->features; 846 847 netdev_update_features(dev); 848 return 0; 849 } 850 851 static inline void mvpp2_interrupts_enable(struct mvpp2_port *port) 852 { 853 int i, sw_thread_mask = 0; 854 855 for (i = 0; i < port->nqvecs; i++) 856 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 857 858 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 859 MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask)); 860 } 861 862 static inline void mvpp2_interrupts_disable(struct mvpp2_port *port) 863 { 864 int i, sw_thread_mask = 0; 865 866 for (i = 0; i < port->nqvecs; i++) 867 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 868 869 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 870 MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask)); 871 } 872 873 static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec) 874 { 875 struct mvpp2_port *port = qvec->port; 876 877 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 878 MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask)); 879 } 880 881 static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) 882 { 883 struct mvpp2_port *port = qvec->port; 884 885 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 886 MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask)); 887 } 888 889 /* Mask the current CPU's Rx/Tx interrupts 890 * Called by on_each_cpu(), guaranteed to run with migration disabled, 891 * using smp_processor_id() is OK. 892 */ 893 static void mvpp2_interrupts_mask(void *arg) 894 { 895 struct mvpp2_port *port = arg; 896 897 mvpp2_percpu_write(port->priv, smp_processor_id(), 898 MVPP2_ISR_RX_TX_MASK_REG(port->id), 0); 899 } 900 901 /* Unmask the current CPU's Rx/Tx interrupts. 902 * Called by on_each_cpu(), guaranteed to run with migration disabled, 903 * using smp_processor_id() is OK. 904 */ 905 static void mvpp2_interrupts_unmask(void *arg) 906 { 907 struct mvpp2_port *port = arg; 908 u32 val; 909 910 val = MVPP2_CAUSE_MISC_SUM_MASK | 911 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK; 912 if (port->has_tx_irqs) 913 val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 914 915 mvpp2_percpu_write(port->priv, smp_processor_id(), 916 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 917 } 918 919 static void 920 mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask) 921 { 922 u32 val; 923 int i; 924 925 if (port->priv->hw_version != MVPP22) 926 return; 927 928 if (mask) 929 val = 0; 930 else 931 val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK; 932 933 for (i = 0; i < port->nqvecs; i++) { 934 struct mvpp2_queue_vector *v = port->qvecs + i; 935 936 if (v->type != MVPP2_QUEUE_VECTOR_SHARED) 937 continue; 938 939 mvpp2_percpu_write(port->priv, v->sw_thread_id, 940 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 941 } 942 } 943 944 /* Port configuration routines */ 945 946 static void mvpp22_gop_init_rgmii(struct mvpp2_port *port) 947 { 948 struct mvpp2 *priv = port->priv; 949 u32 val; 950 951 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 952 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT; 953 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 954 955 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 956 if (port->gop_id == 2) 957 val |= GENCONF_CTRL0_PORT0_RGMII | GENCONF_CTRL0_PORT1_RGMII; 958 else if (port->gop_id == 3) 959 val |= GENCONF_CTRL0_PORT1_RGMII_MII; 960 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 961 } 962 963 static void mvpp22_gop_init_sgmii(struct mvpp2_port *port) 964 { 965 struct mvpp2 *priv = port->priv; 966 u32 val; 967 968 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 969 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT | 970 GENCONF_PORT_CTRL0_RX_DATA_SAMPLE; 971 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 972 973 if (port->gop_id > 1) { 974 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 975 if (port->gop_id == 2) 976 val &= ~GENCONF_CTRL0_PORT0_RGMII; 977 else if (port->gop_id == 3) 978 val &= ~GENCONF_CTRL0_PORT1_RGMII_MII; 979 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 980 } 981 } 982 983 static void mvpp22_gop_init_10gkr(struct mvpp2_port *port) 984 { 985 struct mvpp2 *priv = port->priv; 986 void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 987 void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 988 u32 val; 989 990 /* XPCS */ 991 val = readl(xpcs + MVPP22_XPCS_CFG0); 992 val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) | 993 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3)); 994 val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2); 995 writel(val, xpcs + MVPP22_XPCS_CFG0); 996 997 /* MPCS */ 998 val = readl(mpcs + MVPP22_MPCS_CTRL); 999 val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN; 1000 writel(val, mpcs + MVPP22_MPCS_CTRL); 1001 1002 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1003 val &= ~(MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7) | MAC_CLK_RESET_MAC | 1004 MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX); 1005 val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1); 1006 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1007 1008 val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET; 1009 val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX; 1010 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1011 } 1012 1013 static int mvpp22_gop_init(struct mvpp2_port *port) 1014 { 1015 struct mvpp2 *priv = port->priv; 1016 u32 val; 1017 1018 if (!priv->sysctrl_base) 1019 return 0; 1020 1021 switch (port->phy_interface) { 1022 case PHY_INTERFACE_MODE_RGMII: 1023 case PHY_INTERFACE_MODE_RGMII_ID: 1024 case PHY_INTERFACE_MODE_RGMII_RXID: 1025 case PHY_INTERFACE_MODE_RGMII_TXID: 1026 if (port->gop_id == 0) 1027 goto invalid_conf; 1028 mvpp22_gop_init_rgmii(port); 1029 break; 1030 case PHY_INTERFACE_MODE_SGMII: 1031 case PHY_INTERFACE_MODE_1000BASEX: 1032 case PHY_INTERFACE_MODE_2500BASEX: 1033 mvpp22_gop_init_sgmii(port); 1034 break; 1035 case PHY_INTERFACE_MODE_10GKR: 1036 if (port->gop_id != 0) 1037 goto invalid_conf; 1038 mvpp22_gop_init_10gkr(port); 1039 break; 1040 default: 1041 goto unsupported_conf; 1042 } 1043 1044 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val); 1045 val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) | 1046 GENCONF_PORT_CTRL1_EN(port->gop_id); 1047 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val); 1048 1049 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1050 val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR; 1051 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1052 1053 regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val); 1054 val |= GENCONF_SOFT_RESET1_GOP; 1055 regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val); 1056 1057 unsupported_conf: 1058 return 0; 1059 1060 invalid_conf: 1061 netdev_err(port->dev, "Invalid port configuration\n"); 1062 return -EINVAL; 1063 } 1064 1065 static void mvpp22_gop_unmask_irq(struct mvpp2_port *port) 1066 { 1067 u32 val; 1068 1069 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1070 port->phy_interface == PHY_INTERFACE_MODE_SGMII || 1071 port->phy_interface == PHY_INTERFACE_MODE_1000BASEX || 1072 port->phy_interface == PHY_INTERFACE_MODE_2500BASEX) { 1073 /* Enable the GMAC link status irq for this port */ 1074 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1075 val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1076 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1077 } 1078 1079 if (port->gop_id == 0) { 1080 /* Enable the XLG/GIG irqs for this port */ 1081 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1082 if (port->phy_interface == PHY_INTERFACE_MODE_10GKR) 1083 val |= MVPP22_XLG_EXT_INT_MASK_XLG; 1084 else 1085 val |= MVPP22_XLG_EXT_INT_MASK_GIG; 1086 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1087 } 1088 } 1089 1090 static void mvpp22_gop_mask_irq(struct mvpp2_port *port) 1091 { 1092 u32 val; 1093 1094 if (port->gop_id == 0) { 1095 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1096 val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG | 1097 MVPP22_XLG_EXT_INT_MASK_GIG); 1098 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1099 } 1100 1101 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1102 port->phy_interface == PHY_INTERFACE_MODE_SGMII || 1103 port->phy_interface == PHY_INTERFACE_MODE_1000BASEX || 1104 port->phy_interface == PHY_INTERFACE_MODE_2500BASEX) { 1105 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1106 val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1107 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1108 } 1109 } 1110 1111 static void mvpp22_gop_setup_irq(struct mvpp2_port *port) 1112 { 1113 u32 val; 1114 1115 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1116 port->phy_interface == PHY_INTERFACE_MODE_SGMII || 1117 port->phy_interface == PHY_INTERFACE_MODE_1000BASEX || 1118 port->phy_interface == PHY_INTERFACE_MODE_2500BASEX) { 1119 val = readl(port->base + MVPP22_GMAC_INT_MASK); 1120 val |= MVPP22_GMAC_INT_MASK_LINK_STAT; 1121 writel(val, port->base + MVPP22_GMAC_INT_MASK); 1122 } 1123 1124 if (port->gop_id == 0) { 1125 val = readl(port->base + MVPP22_XLG_INT_MASK); 1126 val |= MVPP22_XLG_INT_MASK_LINK; 1127 writel(val, port->base + MVPP22_XLG_INT_MASK); 1128 } 1129 1130 mvpp22_gop_unmask_irq(port); 1131 } 1132 1133 /* Sets the PHY mode of the COMPHY (which configures the serdes lanes). 1134 * 1135 * The PHY mode used by the PPv2 driver comes from the network subsystem, while 1136 * the one given to the COMPHY comes from the generic PHY subsystem. Hence they 1137 * differ. 1138 * 1139 * The COMPHY configures the serdes lanes regardless of the actual use of the 1140 * lanes by the physical layer. This is why configurations like 1141 * "PPv2 (2500BaseX) - COMPHY (2500SGMII)" are valid. 1142 */ 1143 static int mvpp22_comphy_init(struct mvpp2_port *port) 1144 { 1145 enum phy_mode mode; 1146 int ret; 1147 1148 if (!port->comphy) 1149 return 0; 1150 1151 switch (port->phy_interface) { 1152 case PHY_INTERFACE_MODE_SGMII: 1153 case PHY_INTERFACE_MODE_1000BASEX: 1154 mode = PHY_MODE_SGMII; 1155 break; 1156 case PHY_INTERFACE_MODE_2500BASEX: 1157 mode = PHY_MODE_2500SGMII; 1158 break; 1159 case PHY_INTERFACE_MODE_10GKR: 1160 mode = PHY_MODE_10GKR; 1161 break; 1162 default: 1163 return -EINVAL; 1164 } 1165 1166 ret = phy_set_mode(port->comphy, mode); 1167 if (ret) 1168 return ret; 1169 1170 return phy_power_on(port->comphy); 1171 } 1172 1173 static void mvpp2_port_enable(struct mvpp2_port *port) 1174 { 1175 u32 val; 1176 1177 /* Only GOP port 0 has an XLG MAC */ 1178 if (port->gop_id == 0 && 1179 (port->phy_interface == PHY_INTERFACE_MODE_XAUI || 1180 port->phy_interface == PHY_INTERFACE_MODE_10GKR)) { 1181 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1182 val |= MVPP22_XLG_CTRL0_PORT_EN | 1183 MVPP22_XLG_CTRL0_MAC_RESET_DIS; 1184 val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS; 1185 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1186 } else { 1187 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1188 val |= MVPP2_GMAC_PORT_EN_MASK; 1189 val |= MVPP2_GMAC_MIB_CNTR_EN_MASK; 1190 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1191 } 1192 } 1193 1194 static void mvpp2_port_disable(struct mvpp2_port *port) 1195 { 1196 u32 val; 1197 1198 /* Only GOP port 0 has an XLG MAC */ 1199 if (port->gop_id == 0 && 1200 (port->phy_interface == PHY_INTERFACE_MODE_XAUI || 1201 port->phy_interface == PHY_INTERFACE_MODE_10GKR)) { 1202 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1203 val &= ~MVPP22_XLG_CTRL0_PORT_EN; 1204 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1205 1206 /* Disable & reset should be done separately */ 1207 val &= ~MVPP22_XLG_CTRL0_MAC_RESET_DIS; 1208 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1209 } else { 1210 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1211 val &= ~(MVPP2_GMAC_PORT_EN_MASK); 1212 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1213 } 1214 } 1215 1216 /* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */ 1217 static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port) 1218 { 1219 u32 val; 1220 1221 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) & 1222 ~MVPP2_GMAC_PERIODIC_XON_EN_MASK; 1223 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1224 } 1225 1226 /* Configure loopback port */ 1227 static void mvpp2_port_loopback_set(struct mvpp2_port *port, 1228 const struct phylink_link_state *state) 1229 { 1230 u32 val; 1231 1232 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 1233 1234 if (state->speed == 1000) 1235 val |= MVPP2_GMAC_GMII_LB_EN_MASK; 1236 else 1237 val &= ~MVPP2_GMAC_GMII_LB_EN_MASK; 1238 1239 if (port->phy_interface == PHY_INTERFACE_MODE_SGMII || 1240 port->phy_interface == PHY_INTERFACE_MODE_1000BASEX || 1241 port->phy_interface == PHY_INTERFACE_MODE_2500BASEX) 1242 val |= MVPP2_GMAC_PCS_LB_EN_MASK; 1243 else 1244 val &= ~MVPP2_GMAC_PCS_LB_EN_MASK; 1245 1246 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1247 } 1248 1249 struct mvpp2_ethtool_counter { 1250 unsigned int offset; 1251 const char string[ETH_GSTRING_LEN]; 1252 bool reg_is_64b; 1253 }; 1254 1255 static u64 mvpp2_read_count(struct mvpp2_port *port, 1256 const struct mvpp2_ethtool_counter *counter) 1257 { 1258 u64 val; 1259 1260 val = readl(port->stats_base + counter->offset); 1261 if (counter->reg_is_64b) 1262 val += (u64)readl(port->stats_base + counter->offset + 4) << 32; 1263 1264 return val; 1265 } 1266 1267 /* Due to the fact that software statistics and hardware statistics are, by 1268 * design, incremented at different moments in the chain of packet processing, 1269 * it is very likely that incoming packets could have been dropped after being 1270 * counted by hardware but before reaching software statistics (most probably 1271 * multicast packets), and in the oppposite way, during transmission, FCS bytes 1272 * are added in between as well as TSO skb will be split and header bytes added. 1273 * Hence, statistics gathered from userspace with ifconfig (software) and 1274 * ethtool (hardware) cannot be compared. 1275 */ 1276 static const struct mvpp2_ethtool_counter mvpp2_ethtool_regs[] = { 1277 { MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true }, 1278 { MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" }, 1279 { MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" }, 1280 { MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" }, 1281 { MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" }, 1282 { MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" }, 1283 { MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" }, 1284 { MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" }, 1285 { MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" }, 1286 { MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" }, 1287 { MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" }, 1288 { MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" }, 1289 { MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true }, 1290 { MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" }, 1291 { MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" }, 1292 { MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" }, 1293 { MVPP2_MIB_FC_SENT, "fc_sent" }, 1294 { MVPP2_MIB_FC_RCVD, "fc_received" }, 1295 { MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" }, 1296 { MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" }, 1297 { MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" }, 1298 { MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" }, 1299 { MVPP2_MIB_JABBER_RCVD, "jabber_received" }, 1300 { MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" }, 1301 { MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" }, 1302 { MVPP2_MIB_COLLISION, "collision" }, 1303 { MVPP2_MIB_LATE_COLLISION, "late_collision" }, 1304 }; 1305 1306 static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset, 1307 u8 *data) 1308 { 1309 if (sset == ETH_SS_STATS) { 1310 int i; 1311 1312 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++) 1313 memcpy(data + i * ETH_GSTRING_LEN, 1314 &mvpp2_ethtool_regs[i].string, ETH_GSTRING_LEN); 1315 } 1316 } 1317 1318 static void mvpp2_gather_hw_statistics(struct work_struct *work) 1319 { 1320 struct delayed_work *del_work = to_delayed_work(work); 1321 struct mvpp2_port *port = container_of(del_work, struct mvpp2_port, 1322 stats_work); 1323 u64 *pstats; 1324 int i; 1325 1326 mutex_lock(&port->gather_stats_lock); 1327 1328 pstats = port->ethtool_stats; 1329 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++) 1330 *pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_regs[i]); 1331 1332 /* No need to read again the counters right after this function if it 1333 * was called asynchronously by the user (ie. use of ethtool). 1334 */ 1335 cancel_delayed_work(&port->stats_work); 1336 queue_delayed_work(port->priv->stats_queue, &port->stats_work, 1337 MVPP2_MIB_COUNTERS_STATS_DELAY); 1338 1339 mutex_unlock(&port->gather_stats_lock); 1340 } 1341 1342 static void mvpp2_ethtool_get_stats(struct net_device *dev, 1343 struct ethtool_stats *stats, u64 *data) 1344 { 1345 struct mvpp2_port *port = netdev_priv(dev); 1346 1347 /* Update statistics for the given port, then take the lock to avoid 1348 * concurrent accesses on the ethtool_stats structure during its copy. 1349 */ 1350 mvpp2_gather_hw_statistics(&port->stats_work.work); 1351 1352 mutex_lock(&port->gather_stats_lock); 1353 memcpy(data, port->ethtool_stats, 1354 sizeof(u64) * ARRAY_SIZE(mvpp2_ethtool_regs)); 1355 mutex_unlock(&port->gather_stats_lock); 1356 } 1357 1358 static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset) 1359 { 1360 if (sset == ETH_SS_STATS) 1361 return ARRAY_SIZE(mvpp2_ethtool_regs); 1362 1363 return -EOPNOTSUPP; 1364 } 1365 1366 static void mvpp2_port_reset(struct mvpp2_port *port) 1367 { 1368 u32 val; 1369 unsigned int i; 1370 1371 /* Read the GOP statistics to reset the hardware counters */ 1372 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++) 1373 mvpp2_read_count(port, &mvpp2_ethtool_regs[i]); 1374 1375 val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) & 1376 ~MVPP2_GMAC_PORT_RESET_MASK; 1377 writel(val, port->base + MVPP2_GMAC_CTRL_2_REG); 1378 1379 while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) & 1380 MVPP2_GMAC_PORT_RESET_MASK) 1381 continue; 1382 } 1383 1384 /* Change maximum receive size of the port */ 1385 static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port) 1386 { 1387 u32 val; 1388 1389 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1390 val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK; 1391 val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) << 1392 MVPP2_GMAC_MAX_RX_SIZE_OFFS); 1393 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1394 } 1395 1396 /* Change maximum receive size of the port */ 1397 static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port) 1398 { 1399 u32 val; 1400 1401 val = readl(port->base + MVPP22_XLG_CTRL1_REG); 1402 val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK; 1403 val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) << 1404 MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS; 1405 writel(val, port->base + MVPP22_XLG_CTRL1_REG); 1406 } 1407 1408 /* Set defaults to the MVPP2 port */ 1409 static void mvpp2_defaults_set(struct mvpp2_port *port) 1410 { 1411 int tx_port_num, val, queue, ptxq, lrxq; 1412 1413 if (port->priv->hw_version == MVPP21) { 1414 /* Update TX FIFO MIN Threshold */ 1415 val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 1416 val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK; 1417 /* Min. TX threshold must be less than minimal packet length */ 1418 val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2); 1419 writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 1420 } 1421 1422 /* Disable Legacy WRR, Disable EJP, Release from reset */ 1423 tx_port_num = mvpp2_egress_port(port); 1424 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, 1425 tx_port_num); 1426 mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0); 1427 1428 /* Close bandwidth for all queues */ 1429 for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) { 1430 ptxq = mvpp2_txq_phys(port->id, queue); 1431 mvpp2_write(port->priv, 1432 MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(ptxq), 0); 1433 } 1434 1435 /* Set refill period to 1 usec, refill tokens 1436 * and bucket size to maximum 1437 */ 1438 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG, 1439 port->priv->tclk / USEC_PER_SEC); 1440 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG); 1441 val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK; 1442 val |= MVPP2_TXP_REFILL_PERIOD_MASK(1); 1443 val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK; 1444 mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val); 1445 val = MVPP2_TXP_TOKEN_SIZE_MAX; 1446 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 1447 1448 /* Set MaximumLowLatencyPacketSize value to 256 */ 1449 mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id), 1450 MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK | 1451 MVPP2_RX_LOW_LATENCY_PKT_SIZE(256)); 1452 1453 /* Enable Rx cache snoop */ 1454 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1455 queue = port->rxqs[lrxq]->id; 1456 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1457 val |= MVPP2_SNOOP_PKT_SIZE_MASK | 1458 MVPP2_SNOOP_BUF_HDR_MASK; 1459 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1460 } 1461 1462 /* At default, mask all interrupts to all present cpus */ 1463 mvpp2_interrupts_disable(port); 1464 } 1465 1466 /* Enable/disable receiving packets */ 1467 static void mvpp2_ingress_enable(struct mvpp2_port *port) 1468 { 1469 u32 val; 1470 int lrxq, queue; 1471 1472 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1473 queue = port->rxqs[lrxq]->id; 1474 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1475 val &= ~MVPP2_RXQ_DISABLE_MASK; 1476 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1477 } 1478 } 1479 1480 static void mvpp2_ingress_disable(struct mvpp2_port *port) 1481 { 1482 u32 val; 1483 int lrxq, queue; 1484 1485 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1486 queue = port->rxqs[lrxq]->id; 1487 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1488 val |= MVPP2_RXQ_DISABLE_MASK; 1489 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1490 } 1491 } 1492 1493 /* Enable transmit via physical egress queue 1494 * - HW starts take descriptors from DRAM 1495 */ 1496 static void mvpp2_egress_enable(struct mvpp2_port *port) 1497 { 1498 u32 qmap; 1499 int queue; 1500 int tx_port_num = mvpp2_egress_port(port); 1501 1502 /* Enable all initialized TXs. */ 1503 qmap = 0; 1504 for (queue = 0; queue < port->ntxqs; queue++) { 1505 struct mvpp2_tx_queue *txq = port->txqs[queue]; 1506 1507 if (txq->descs) 1508 qmap |= (1 << queue); 1509 } 1510 1511 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 1512 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap); 1513 } 1514 1515 /* Disable transmit via physical egress queue 1516 * - HW doesn't take descriptors from DRAM 1517 */ 1518 static void mvpp2_egress_disable(struct mvpp2_port *port) 1519 { 1520 u32 reg_data; 1521 int delay; 1522 int tx_port_num = mvpp2_egress_port(port); 1523 1524 /* Issue stop command for active channels only */ 1525 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 1526 reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) & 1527 MVPP2_TXP_SCHED_ENQ_MASK; 1528 if (reg_data != 0) 1529 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, 1530 (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET)); 1531 1532 /* Wait for all Tx activity to terminate. */ 1533 delay = 0; 1534 do { 1535 if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) { 1536 netdev_warn(port->dev, 1537 "Tx stop timed out, status=0x%08x\n", 1538 reg_data); 1539 break; 1540 } 1541 mdelay(1); 1542 delay++; 1543 1544 /* Check port TX Command register that all 1545 * Tx queues are stopped 1546 */ 1547 reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG); 1548 } while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK); 1549 } 1550 1551 /* Rx descriptors helper methods */ 1552 1553 /* Get number of Rx descriptors occupied by received packets */ 1554 static inline int 1555 mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id) 1556 { 1557 u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id)); 1558 1559 return val & MVPP2_RXQ_OCCUPIED_MASK; 1560 } 1561 1562 /* Update Rx queue status with the number of occupied and available 1563 * Rx descriptor slots. 1564 */ 1565 static inline void 1566 mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id, 1567 int used_count, int free_count) 1568 { 1569 /* Decrement the number of used descriptors and increment count 1570 * increment the number of free descriptors. 1571 */ 1572 u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET); 1573 1574 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val); 1575 } 1576 1577 /* Get pointer to next RX descriptor to be processed by SW */ 1578 static inline struct mvpp2_rx_desc * 1579 mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq) 1580 { 1581 int rx_desc = rxq->next_desc_to_proc; 1582 1583 rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc); 1584 prefetch(rxq->descs + rxq->next_desc_to_proc); 1585 return rxq->descs + rx_desc; 1586 } 1587 1588 /* Set rx queue offset */ 1589 static void mvpp2_rxq_offset_set(struct mvpp2_port *port, 1590 int prxq, int offset) 1591 { 1592 u32 val; 1593 1594 /* Convert offset from bytes to units of 32 bytes */ 1595 offset = offset >> 5; 1596 1597 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 1598 val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK; 1599 1600 /* Offset is in */ 1601 val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) & 1602 MVPP2_RXQ_PACKET_OFFSET_MASK); 1603 1604 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 1605 } 1606 1607 /* Tx descriptors helper methods */ 1608 1609 /* Get pointer to next Tx descriptor to be processed (send) by HW */ 1610 static struct mvpp2_tx_desc * 1611 mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq) 1612 { 1613 int tx_desc = txq->next_desc_to_proc; 1614 1615 txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc); 1616 return txq->descs + tx_desc; 1617 } 1618 1619 /* Update HW with number of aggregated Tx descriptors to be sent 1620 * 1621 * Called only from mvpp2_tx(), so migration is disabled, using 1622 * smp_processor_id() is OK. 1623 */ 1624 static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending) 1625 { 1626 /* aggregated access - relevant TXQ number is written in TX desc */ 1627 mvpp2_percpu_write(port->priv, smp_processor_id(), 1628 MVPP2_AGGR_TXQ_UPDATE_REG, pending); 1629 } 1630 1631 /* Check if there are enough free descriptors in aggregated txq. 1632 * If not, update the number of occupied descriptors and repeat the check. 1633 * 1634 * Called only from mvpp2_tx(), so migration is disabled, using 1635 * smp_processor_id() is OK. 1636 */ 1637 static int mvpp2_aggr_desc_num_check(struct mvpp2 *priv, 1638 struct mvpp2_tx_queue *aggr_txq, int num) 1639 { 1640 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) { 1641 /* Update number of occupied aggregated Tx descriptors */ 1642 int cpu = smp_processor_id(); 1643 u32 val = mvpp2_read_relaxed(priv, 1644 MVPP2_AGGR_TXQ_STATUS_REG(cpu)); 1645 1646 aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK; 1647 1648 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) 1649 return -ENOMEM; 1650 } 1651 return 0; 1652 } 1653 1654 /* Reserved Tx descriptors allocation request 1655 * 1656 * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called 1657 * only by mvpp2_tx(), so migration is disabled, using 1658 * smp_processor_id() is OK. 1659 */ 1660 static int mvpp2_txq_alloc_reserved_desc(struct mvpp2 *priv, 1661 struct mvpp2_tx_queue *txq, int num) 1662 { 1663 u32 val; 1664 int cpu = smp_processor_id(); 1665 1666 val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num; 1667 mvpp2_percpu_write_relaxed(priv, cpu, MVPP2_TXQ_RSVD_REQ_REG, val); 1668 1669 val = mvpp2_percpu_read_relaxed(priv, cpu, MVPP2_TXQ_RSVD_RSLT_REG); 1670 1671 return val & MVPP2_TXQ_RSVD_RSLT_MASK; 1672 } 1673 1674 /* Check if there are enough reserved descriptors for transmission. 1675 * If not, request chunk of reserved descriptors and check again. 1676 */ 1677 static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2 *priv, 1678 struct mvpp2_tx_queue *txq, 1679 struct mvpp2_txq_pcpu *txq_pcpu, 1680 int num) 1681 { 1682 int req, cpu, desc_count; 1683 1684 if (txq_pcpu->reserved_num >= num) 1685 return 0; 1686 1687 /* Not enough descriptors reserved! Update the reserved descriptor 1688 * count and check again. 1689 */ 1690 1691 desc_count = 0; 1692 /* Compute total of used descriptors */ 1693 for_each_present_cpu(cpu) { 1694 struct mvpp2_txq_pcpu *txq_pcpu_aux; 1695 1696 txq_pcpu_aux = per_cpu_ptr(txq->pcpu, cpu); 1697 desc_count += txq_pcpu_aux->count; 1698 desc_count += txq_pcpu_aux->reserved_num; 1699 } 1700 1701 req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num); 1702 desc_count += req; 1703 1704 if (desc_count > 1705 (txq->size - (num_present_cpus() * MVPP2_CPU_DESC_CHUNK))) 1706 return -ENOMEM; 1707 1708 txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(priv, txq, req); 1709 1710 /* OK, the descriptor could have been updated: check again. */ 1711 if (txq_pcpu->reserved_num < num) 1712 return -ENOMEM; 1713 return 0; 1714 } 1715 1716 /* Release the last allocated Tx descriptor. Useful to handle DMA 1717 * mapping failures in the Tx path. 1718 */ 1719 static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq) 1720 { 1721 if (txq->next_desc_to_proc == 0) 1722 txq->next_desc_to_proc = txq->last_desc - 1; 1723 else 1724 txq->next_desc_to_proc--; 1725 } 1726 1727 /* Set Tx descriptors fields relevant for CSUM calculation */ 1728 static u32 mvpp2_txq_desc_csum(int l3_offs, __be16 l3_proto, 1729 int ip_hdr_len, int l4_proto) 1730 { 1731 u32 command; 1732 1733 /* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, 1734 * G_L4_chk, L4_type required only for checksum calculation 1735 */ 1736 command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT); 1737 command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT); 1738 command |= MVPP2_TXD_IP_CSUM_DISABLE; 1739 1740 if (l3_proto == htons(ETH_P_IP)) { 1741 command &= ~MVPP2_TXD_IP_CSUM_DISABLE; /* enable IPv4 csum */ 1742 command &= ~MVPP2_TXD_L3_IP6; /* enable IPv4 */ 1743 } else { 1744 command |= MVPP2_TXD_L3_IP6; /* enable IPv6 */ 1745 } 1746 1747 if (l4_proto == IPPROTO_TCP) { 1748 command &= ~MVPP2_TXD_L4_UDP; /* enable TCP */ 1749 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 1750 } else if (l4_proto == IPPROTO_UDP) { 1751 command |= MVPP2_TXD_L4_UDP; /* enable UDP */ 1752 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 1753 } else { 1754 command |= MVPP2_TXD_L4_CSUM_NOT; 1755 } 1756 1757 return command; 1758 } 1759 1760 /* Get number of sent descriptors and decrement counter. 1761 * The number of sent descriptors is returned. 1762 * Per-CPU access 1763 * 1764 * Called only from mvpp2_txq_done(), called from mvpp2_tx() 1765 * (migration disabled) and from the TX completion tasklet (migration 1766 * disabled) so using smp_processor_id() is OK. 1767 */ 1768 static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port, 1769 struct mvpp2_tx_queue *txq) 1770 { 1771 u32 val; 1772 1773 /* Reading status reg resets transmitted descriptor counter */ 1774 val = mvpp2_percpu_read_relaxed(port->priv, smp_processor_id(), 1775 MVPP2_TXQ_SENT_REG(txq->id)); 1776 1777 return (val & MVPP2_TRANSMITTED_COUNT_MASK) >> 1778 MVPP2_TRANSMITTED_COUNT_OFFSET; 1779 } 1780 1781 /* Called through on_each_cpu(), so runs on all CPUs, with migration 1782 * disabled, therefore using smp_processor_id() is OK. 1783 */ 1784 static void mvpp2_txq_sent_counter_clear(void *arg) 1785 { 1786 struct mvpp2_port *port = arg; 1787 int queue; 1788 1789 for (queue = 0; queue < port->ntxqs; queue++) { 1790 int id = port->txqs[queue]->id; 1791 1792 mvpp2_percpu_read(port->priv, smp_processor_id(), 1793 MVPP2_TXQ_SENT_REG(id)); 1794 } 1795 } 1796 1797 /* Set max sizes for Tx queues */ 1798 static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port) 1799 { 1800 u32 val, size, mtu; 1801 int txq, tx_port_num; 1802 1803 mtu = port->pkt_size * 8; 1804 if (mtu > MVPP2_TXP_MTU_MAX) 1805 mtu = MVPP2_TXP_MTU_MAX; 1806 1807 /* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */ 1808 mtu = 3 * mtu; 1809 1810 /* Indirect access to registers */ 1811 tx_port_num = mvpp2_egress_port(port); 1812 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 1813 1814 /* Set MTU */ 1815 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG); 1816 val &= ~MVPP2_TXP_MTU_MAX; 1817 val |= mtu; 1818 mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val); 1819 1820 /* TXP token size and all TXQs token size must be larger that MTU */ 1821 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG); 1822 size = val & MVPP2_TXP_TOKEN_SIZE_MAX; 1823 if (size < mtu) { 1824 size = mtu; 1825 val &= ~MVPP2_TXP_TOKEN_SIZE_MAX; 1826 val |= size; 1827 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 1828 } 1829 1830 for (txq = 0; txq < port->ntxqs; txq++) { 1831 val = mvpp2_read(port->priv, 1832 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq)); 1833 size = val & MVPP2_TXQ_TOKEN_SIZE_MAX; 1834 1835 if (size < mtu) { 1836 size = mtu; 1837 val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX; 1838 val |= size; 1839 mvpp2_write(port->priv, 1840 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq), 1841 val); 1842 } 1843 } 1844 } 1845 1846 /* Set the number of packets that will be received before Rx interrupt 1847 * will be generated by HW. 1848 */ 1849 static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port, 1850 struct mvpp2_rx_queue *rxq) 1851 { 1852 int cpu = get_cpu(); 1853 1854 if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK) 1855 rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK; 1856 1857 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id); 1858 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_THRESH_REG, 1859 rxq->pkts_coal); 1860 1861 put_cpu(); 1862 } 1863 1864 /* For some reason in the LSP this is done on each CPU. Why ? */ 1865 static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port, 1866 struct mvpp2_tx_queue *txq) 1867 { 1868 int cpu = get_cpu(); 1869 u32 val; 1870 1871 if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK) 1872 txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK; 1873 1874 val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET); 1875 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id); 1876 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_THRESH_REG, val); 1877 1878 put_cpu(); 1879 } 1880 1881 static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz) 1882 { 1883 u64 tmp = (u64)clk_hz * usec; 1884 1885 do_div(tmp, USEC_PER_SEC); 1886 1887 return tmp > U32_MAX ? U32_MAX : tmp; 1888 } 1889 1890 static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz) 1891 { 1892 u64 tmp = (u64)cycles * USEC_PER_SEC; 1893 1894 do_div(tmp, clk_hz); 1895 1896 return tmp > U32_MAX ? U32_MAX : tmp; 1897 } 1898 1899 /* Set the time delay in usec before Rx interrupt */ 1900 static void mvpp2_rx_time_coal_set(struct mvpp2_port *port, 1901 struct mvpp2_rx_queue *rxq) 1902 { 1903 unsigned long freq = port->priv->tclk; 1904 u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 1905 1906 if (val > MVPP2_MAX_ISR_RX_THRESHOLD) { 1907 rxq->time_coal = 1908 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq); 1909 1910 /* re-evaluate to get actual register value */ 1911 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 1912 } 1913 1914 mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val); 1915 } 1916 1917 static void mvpp2_tx_time_coal_set(struct mvpp2_port *port) 1918 { 1919 unsigned long freq = port->priv->tclk; 1920 u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 1921 1922 if (val > MVPP2_MAX_ISR_TX_THRESHOLD) { 1923 port->tx_time_coal = 1924 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq); 1925 1926 /* re-evaluate to get actual register value */ 1927 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 1928 } 1929 1930 mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), val); 1931 } 1932 1933 /* Free Tx queue skbuffs */ 1934 static void mvpp2_txq_bufs_free(struct mvpp2_port *port, 1935 struct mvpp2_tx_queue *txq, 1936 struct mvpp2_txq_pcpu *txq_pcpu, int num) 1937 { 1938 int i; 1939 1940 for (i = 0; i < num; i++) { 1941 struct mvpp2_txq_pcpu_buf *tx_buf = 1942 txq_pcpu->buffs + txq_pcpu->txq_get_index; 1943 1944 if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma)) 1945 dma_unmap_single(port->dev->dev.parent, tx_buf->dma, 1946 tx_buf->size, DMA_TO_DEVICE); 1947 if (tx_buf->skb) 1948 dev_kfree_skb_any(tx_buf->skb); 1949 1950 mvpp2_txq_inc_get(txq_pcpu); 1951 } 1952 } 1953 1954 static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port, 1955 u32 cause) 1956 { 1957 int queue = fls(cause) - 1; 1958 1959 return port->rxqs[queue]; 1960 } 1961 1962 static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port, 1963 u32 cause) 1964 { 1965 int queue = fls(cause) - 1; 1966 1967 return port->txqs[queue]; 1968 } 1969 1970 /* Handle end of transmission */ 1971 static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 1972 struct mvpp2_txq_pcpu *txq_pcpu) 1973 { 1974 struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id); 1975 int tx_done; 1976 1977 if (txq_pcpu->cpu != smp_processor_id()) 1978 netdev_err(port->dev, "wrong cpu on the end of Tx processing\n"); 1979 1980 tx_done = mvpp2_txq_sent_desc_proc(port, txq); 1981 if (!tx_done) 1982 return; 1983 mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done); 1984 1985 txq_pcpu->count -= tx_done; 1986 1987 if (netif_tx_queue_stopped(nq)) 1988 if (txq_pcpu->count <= txq_pcpu->wake_threshold) 1989 netif_tx_wake_queue(nq); 1990 } 1991 1992 static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause, 1993 int cpu) 1994 { 1995 struct mvpp2_tx_queue *txq; 1996 struct mvpp2_txq_pcpu *txq_pcpu; 1997 unsigned int tx_todo = 0; 1998 1999 while (cause) { 2000 txq = mvpp2_get_tx_queue(port, cause); 2001 if (!txq) 2002 break; 2003 2004 txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); 2005 2006 if (txq_pcpu->count) { 2007 mvpp2_txq_done(port, txq, txq_pcpu); 2008 tx_todo += txq_pcpu->count; 2009 } 2010 2011 cause &= ~(1 << txq->log_id); 2012 } 2013 return tx_todo; 2014 } 2015 2016 /* Rx/Tx queue initialization/cleanup methods */ 2017 2018 /* Allocate and initialize descriptors for aggr TXQ */ 2019 static int mvpp2_aggr_txq_init(struct platform_device *pdev, 2020 struct mvpp2_tx_queue *aggr_txq, int cpu, 2021 struct mvpp2 *priv) 2022 { 2023 u32 txq_dma; 2024 2025 /* Allocate memory for TX descriptors */ 2026 aggr_txq->descs = dma_zalloc_coherent(&pdev->dev, 2027 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 2028 &aggr_txq->descs_dma, GFP_KERNEL); 2029 if (!aggr_txq->descs) 2030 return -ENOMEM; 2031 2032 aggr_txq->last_desc = MVPP2_AGGR_TXQ_SIZE - 1; 2033 2034 /* Aggr TXQ no reset WA */ 2035 aggr_txq->next_desc_to_proc = mvpp2_read(priv, 2036 MVPP2_AGGR_TXQ_INDEX_REG(cpu)); 2037 2038 /* Set Tx descriptors queue starting address indirect 2039 * access 2040 */ 2041 if (priv->hw_version == MVPP21) 2042 txq_dma = aggr_txq->descs_dma; 2043 else 2044 txq_dma = aggr_txq->descs_dma >> 2045 MVPP22_AGGR_TXQ_DESC_ADDR_OFFS; 2046 2047 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(cpu), txq_dma); 2048 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(cpu), 2049 MVPP2_AGGR_TXQ_SIZE); 2050 2051 return 0; 2052 } 2053 2054 /* Create a specified Rx queue */ 2055 static int mvpp2_rxq_init(struct mvpp2_port *port, 2056 struct mvpp2_rx_queue *rxq) 2057 2058 { 2059 u32 rxq_dma; 2060 int cpu; 2061 2062 rxq->size = port->rx_ring_size; 2063 2064 /* Allocate memory for RX descriptors */ 2065 rxq->descs = dma_alloc_coherent(port->dev->dev.parent, 2066 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2067 &rxq->descs_dma, GFP_KERNEL); 2068 if (!rxq->descs) 2069 return -ENOMEM; 2070 2071 rxq->last_desc = rxq->size - 1; 2072 2073 /* Zero occupied and non-occupied counters - direct access */ 2074 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2075 2076 /* Set Rx descriptors queue starting address - indirect access */ 2077 cpu = get_cpu(); 2078 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id); 2079 if (port->priv->hw_version == MVPP21) 2080 rxq_dma = rxq->descs_dma; 2081 else 2082 rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS; 2083 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma); 2084 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_SIZE_REG, rxq->size); 2085 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_INDEX_REG, 0); 2086 put_cpu(); 2087 2088 /* Set Offset */ 2089 mvpp2_rxq_offset_set(port, rxq->id, NET_SKB_PAD); 2090 2091 /* Set coalescing pkts and time */ 2092 mvpp2_rx_pkts_coal_set(port, rxq); 2093 mvpp2_rx_time_coal_set(port, rxq); 2094 2095 /* Add number of descriptors ready for receiving packets */ 2096 mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size); 2097 2098 return 0; 2099 } 2100 2101 /* Push packets received by the RXQ to BM pool */ 2102 static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port, 2103 struct mvpp2_rx_queue *rxq) 2104 { 2105 int rx_received, i; 2106 2107 rx_received = mvpp2_rxq_received(port, rxq->id); 2108 if (!rx_received) 2109 return; 2110 2111 for (i = 0; i < rx_received; i++) { 2112 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 2113 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 2114 int pool; 2115 2116 pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >> 2117 MVPP2_RXD_BM_POOL_ID_OFFS; 2118 2119 mvpp2_bm_pool_put(port, pool, 2120 mvpp2_rxdesc_dma_addr_get(port, rx_desc), 2121 mvpp2_rxdesc_cookie_get(port, rx_desc)); 2122 } 2123 mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received); 2124 } 2125 2126 /* Cleanup Rx queue */ 2127 static void mvpp2_rxq_deinit(struct mvpp2_port *port, 2128 struct mvpp2_rx_queue *rxq) 2129 { 2130 int cpu; 2131 2132 mvpp2_rxq_drop_pkts(port, rxq); 2133 2134 if (rxq->descs) 2135 dma_free_coherent(port->dev->dev.parent, 2136 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2137 rxq->descs, 2138 rxq->descs_dma); 2139 2140 rxq->descs = NULL; 2141 rxq->last_desc = 0; 2142 rxq->next_desc_to_proc = 0; 2143 rxq->descs_dma = 0; 2144 2145 /* Clear Rx descriptors queue starting address and size; 2146 * free descriptor number 2147 */ 2148 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2149 cpu = get_cpu(); 2150 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id); 2151 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_ADDR_REG, 0); 2152 mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_SIZE_REG, 0); 2153 put_cpu(); 2154 } 2155 2156 /* Create and initialize a Tx queue */ 2157 static int mvpp2_txq_init(struct mvpp2_port *port, 2158 struct mvpp2_tx_queue *txq) 2159 { 2160 u32 val; 2161 int cpu, desc, desc_per_txq, tx_port_num; 2162 struct mvpp2_txq_pcpu *txq_pcpu; 2163 2164 txq->size = port->tx_ring_size; 2165 2166 /* Allocate memory for Tx descriptors */ 2167 txq->descs = dma_alloc_coherent(port->dev->dev.parent, 2168 txq->size * MVPP2_DESC_ALIGNED_SIZE, 2169 &txq->descs_dma, GFP_KERNEL); 2170 if (!txq->descs) 2171 return -ENOMEM; 2172 2173 txq->last_desc = txq->size - 1; 2174 2175 /* Set Tx descriptors queue starting address - indirect access */ 2176 cpu = get_cpu(); 2177 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id); 2178 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_ADDR_REG, 2179 txq->descs_dma); 2180 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_SIZE_REG, 2181 txq->size & MVPP2_TXQ_DESC_SIZE_MASK); 2182 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_INDEX_REG, 0); 2183 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_RSVD_CLR_REG, 2184 txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET); 2185 val = mvpp2_percpu_read(port->priv, cpu, MVPP2_TXQ_PENDING_REG); 2186 val &= ~MVPP2_TXQ_PENDING_MASK; 2187 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_PENDING_REG, val); 2188 2189 /* Calculate base address in prefetch buffer. We reserve 16 descriptors 2190 * for each existing TXQ. 2191 * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT 2192 * GBE ports assumed to be continuous from 0 to MVPP2_MAX_PORTS 2193 */ 2194 desc_per_txq = 16; 2195 desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) + 2196 (txq->log_id * desc_per_txq); 2197 2198 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG, 2199 MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 | 2200 MVPP2_PREF_BUF_THRESH(desc_per_txq / 2)); 2201 put_cpu(); 2202 2203 /* WRR / EJP configuration - indirect access */ 2204 tx_port_num = mvpp2_egress_port(port); 2205 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2206 2207 val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id)); 2208 val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK; 2209 val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1); 2210 val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK; 2211 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val); 2212 2213 val = MVPP2_TXQ_TOKEN_SIZE_MAX; 2214 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id), 2215 val); 2216 2217 for_each_present_cpu(cpu) { 2218 txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); 2219 txq_pcpu->size = txq->size; 2220 txq_pcpu->buffs = kmalloc_array(txq_pcpu->size, 2221 sizeof(*txq_pcpu->buffs), 2222 GFP_KERNEL); 2223 if (!txq_pcpu->buffs) 2224 return -ENOMEM; 2225 2226 txq_pcpu->count = 0; 2227 txq_pcpu->reserved_num = 0; 2228 txq_pcpu->txq_put_index = 0; 2229 txq_pcpu->txq_get_index = 0; 2230 txq_pcpu->tso_headers = NULL; 2231 2232 txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS; 2233 txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2; 2234 2235 txq_pcpu->tso_headers = 2236 dma_alloc_coherent(port->dev->dev.parent, 2237 txq_pcpu->size * TSO_HEADER_SIZE, 2238 &txq_pcpu->tso_headers_dma, 2239 GFP_KERNEL); 2240 if (!txq_pcpu->tso_headers) 2241 return -ENOMEM; 2242 } 2243 2244 return 0; 2245 } 2246 2247 /* Free allocated TXQ resources */ 2248 static void mvpp2_txq_deinit(struct mvpp2_port *port, 2249 struct mvpp2_tx_queue *txq) 2250 { 2251 struct mvpp2_txq_pcpu *txq_pcpu; 2252 int cpu; 2253 2254 for_each_present_cpu(cpu) { 2255 txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); 2256 kfree(txq_pcpu->buffs); 2257 2258 if (txq_pcpu->tso_headers) 2259 dma_free_coherent(port->dev->dev.parent, 2260 txq_pcpu->size * TSO_HEADER_SIZE, 2261 txq_pcpu->tso_headers, 2262 txq_pcpu->tso_headers_dma); 2263 2264 txq_pcpu->tso_headers = NULL; 2265 } 2266 2267 if (txq->descs) 2268 dma_free_coherent(port->dev->dev.parent, 2269 txq->size * MVPP2_DESC_ALIGNED_SIZE, 2270 txq->descs, txq->descs_dma); 2271 2272 txq->descs = NULL; 2273 txq->last_desc = 0; 2274 txq->next_desc_to_proc = 0; 2275 txq->descs_dma = 0; 2276 2277 /* Set minimum bandwidth for disabled TXQs */ 2278 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->id), 0); 2279 2280 /* Set Tx descriptors queue starting address and size */ 2281 cpu = get_cpu(); 2282 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id); 2283 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_ADDR_REG, 0); 2284 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_SIZE_REG, 0); 2285 put_cpu(); 2286 } 2287 2288 /* Cleanup Tx ports */ 2289 static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq) 2290 { 2291 struct mvpp2_txq_pcpu *txq_pcpu; 2292 int delay, pending, cpu; 2293 u32 val; 2294 2295 cpu = get_cpu(); 2296 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id); 2297 val = mvpp2_percpu_read(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG); 2298 val |= MVPP2_TXQ_DRAIN_EN_MASK; 2299 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG, val); 2300 2301 /* The napi queue has been stopped so wait for all packets 2302 * to be transmitted. 2303 */ 2304 delay = 0; 2305 do { 2306 if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) { 2307 netdev_warn(port->dev, 2308 "port %d: cleaning queue %d timed out\n", 2309 port->id, txq->log_id); 2310 break; 2311 } 2312 mdelay(1); 2313 delay++; 2314 2315 pending = mvpp2_percpu_read(port->priv, cpu, 2316 MVPP2_TXQ_PENDING_REG); 2317 pending &= MVPP2_TXQ_PENDING_MASK; 2318 } while (pending); 2319 2320 val &= ~MVPP2_TXQ_DRAIN_EN_MASK; 2321 mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG, val); 2322 put_cpu(); 2323 2324 for_each_present_cpu(cpu) { 2325 txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); 2326 2327 /* Release all packets */ 2328 mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count); 2329 2330 /* Reset queue */ 2331 txq_pcpu->count = 0; 2332 txq_pcpu->txq_put_index = 0; 2333 txq_pcpu->txq_get_index = 0; 2334 } 2335 } 2336 2337 /* Cleanup all Tx queues */ 2338 static void mvpp2_cleanup_txqs(struct mvpp2_port *port) 2339 { 2340 struct mvpp2_tx_queue *txq; 2341 int queue; 2342 u32 val; 2343 2344 val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG); 2345 2346 /* Reset Tx ports and delete Tx queues */ 2347 val |= MVPP2_TX_PORT_FLUSH_MASK(port->id); 2348 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 2349 2350 for (queue = 0; queue < port->ntxqs; queue++) { 2351 txq = port->txqs[queue]; 2352 mvpp2_txq_clean(port, txq); 2353 mvpp2_txq_deinit(port, txq); 2354 } 2355 2356 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 2357 2358 val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id); 2359 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 2360 } 2361 2362 /* Cleanup all Rx queues */ 2363 static void mvpp2_cleanup_rxqs(struct mvpp2_port *port) 2364 { 2365 int queue; 2366 2367 for (queue = 0; queue < port->nrxqs; queue++) 2368 mvpp2_rxq_deinit(port, port->rxqs[queue]); 2369 } 2370 2371 /* Init all Rx queues for port */ 2372 static int mvpp2_setup_rxqs(struct mvpp2_port *port) 2373 { 2374 int queue, err; 2375 2376 for (queue = 0; queue < port->nrxqs; queue++) { 2377 err = mvpp2_rxq_init(port, port->rxqs[queue]); 2378 if (err) 2379 goto err_cleanup; 2380 } 2381 return 0; 2382 2383 err_cleanup: 2384 mvpp2_cleanup_rxqs(port); 2385 return err; 2386 } 2387 2388 /* Init all tx queues for port */ 2389 static int mvpp2_setup_txqs(struct mvpp2_port *port) 2390 { 2391 struct mvpp2_tx_queue *txq; 2392 int queue, err; 2393 2394 for (queue = 0; queue < port->ntxqs; queue++) { 2395 txq = port->txqs[queue]; 2396 err = mvpp2_txq_init(port, txq); 2397 if (err) 2398 goto err_cleanup; 2399 } 2400 2401 if (port->has_tx_irqs) { 2402 mvpp2_tx_time_coal_set(port); 2403 for (queue = 0; queue < port->ntxqs; queue++) { 2404 txq = port->txqs[queue]; 2405 mvpp2_tx_pkts_coal_set(port, txq); 2406 } 2407 } 2408 2409 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 2410 return 0; 2411 2412 err_cleanup: 2413 mvpp2_cleanup_txqs(port); 2414 return err; 2415 } 2416 2417 /* The callback for per-port interrupt */ 2418 static irqreturn_t mvpp2_isr(int irq, void *dev_id) 2419 { 2420 struct mvpp2_queue_vector *qv = dev_id; 2421 2422 mvpp2_qvec_interrupt_disable(qv); 2423 2424 napi_schedule(&qv->napi); 2425 2426 return IRQ_HANDLED; 2427 } 2428 2429 /* Per-port interrupt for link status changes */ 2430 static irqreturn_t mvpp2_link_status_isr(int irq, void *dev_id) 2431 { 2432 struct mvpp2_port *port = (struct mvpp2_port *)dev_id; 2433 struct net_device *dev = port->dev; 2434 bool event = false, link = false; 2435 u32 val; 2436 2437 mvpp22_gop_mask_irq(port); 2438 2439 if (port->gop_id == 0 && 2440 port->phy_interface == PHY_INTERFACE_MODE_10GKR) { 2441 val = readl(port->base + MVPP22_XLG_INT_STAT); 2442 if (val & MVPP22_XLG_INT_STAT_LINK) { 2443 event = true; 2444 val = readl(port->base + MVPP22_XLG_STATUS); 2445 if (val & MVPP22_XLG_STATUS_LINK_UP) 2446 link = true; 2447 } 2448 } else if (phy_interface_mode_is_rgmii(port->phy_interface) || 2449 port->phy_interface == PHY_INTERFACE_MODE_SGMII || 2450 port->phy_interface == PHY_INTERFACE_MODE_1000BASEX || 2451 port->phy_interface == PHY_INTERFACE_MODE_2500BASEX) { 2452 val = readl(port->base + MVPP22_GMAC_INT_STAT); 2453 if (val & MVPP22_GMAC_INT_STAT_LINK) { 2454 event = true; 2455 val = readl(port->base + MVPP2_GMAC_STATUS0); 2456 if (val & MVPP2_GMAC_STATUS0_LINK_UP) 2457 link = true; 2458 } 2459 } 2460 2461 if (port->phylink) { 2462 phylink_mac_change(port->phylink, link); 2463 goto handled; 2464 } 2465 2466 if (!netif_running(dev) || !event) 2467 goto handled; 2468 2469 if (link) { 2470 mvpp2_interrupts_enable(port); 2471 2472 mvpp2_egress_enable(port); 2473 mvpp2_ingress_enable(port); 2474 netif_carrier_on(dev); 2475 netif_tx_wake_all_queues(dev); 2476 } else { 2477 netif_tx_stop_all_queues(dev); 2478 netif_carrier_off(dev); 2479 mvpp2_ingress_disable(port); 2480 mvpp2_egress_disable(port); 2481 2482 mvpp2_interrupts_disable(port); 2483 } 2484 2485 handled: 2486 mvpp22_gop_unmask_irq(port); 2487 return IRQ_HANDLED; 2488 } 2489 2490 static void mvpp2_timer_set(struct mvpp2_port_pcpu *port_pcpu) 2491 { 2492 ktime_t interval; 2493 2494 if (!port_pcpu->timer_scheduled) { 2495 port_pcpu->timer_scheduled = true; 2496 interval = MVPP2_TXDONE_HRTIMER_PERIOD_NS; 2497 hrtimer_start(&port_pcpu->tx_done_timer, interval, 2498 HRTIMER_MODE_REL_PINNED); 2499 } 2500 } 2501 2502 static void mvpp2_tx_proc_cb(unsigned long data) 2503 { 2504 struct net_device *dev = (struct net_device *)data; 2505 struct mvpp2_port *port = netdev_priv(dev); 2506 struct mvpp2_port_pcpu *port_pcpu = this_cpu_ptr(port->pcpu); 2507 unsigned int tx_todo, cause; 2508 2509 if (!netif_running(dev)) 2510 return; 2511 port_pcpu->timer_scheduled = false; 2512 2513 /* Process all the Tx queues */ 2514 cause = (1 << port->ntxqs) - 1; 2515 tx_todo = mvpp2_tx_done(port, cause, smp_processor_id()); 2516 2517 /* Set the timer in case not all the packets were processed */ 2518 if (tx_todo) 2519 mvpp2_timer_set(port_pcpu); 2520 } 2521 2522 static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer) 2523 { 2524 struct mvpp2_port_pcpu *port_pcpu = container_of(timer, 2525 struct mvpp2_port_pcpu, 2526 tx_done_timer); 2527 2528 tasklet_schedule(&port_pcpu->tx_done_tasklet); 2529 2530 return HRTIMER_NORESTART; 2531 } 2532 2533 /* Main RX/TX processing routines */ 2534 2535 /* Display more error info */ 2536 static void mvpp2_rx_error(struct mvpp2_port *port, 2537 struct mvpp2_rx_desc *rx_desc) 2538 { 2539 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 2540 size_t sz = mvpp2_rxdesc_size_get(port, rx_desc); 2541 char *err_str = NULL; 2542 2543 switch (status & MVPP2_RXD_ERR_CODE_MASK) { 2544 case MVPP2_RXD_ERR_CRC: 2545 err_str = "crc"; 2546 break; 2547 case MVPP2_RXD_ERR_OVERRUN: 2548 err_str = "overrun"; 2549 break; 2550 case MVPP2_RXD_ERR_RESOURCE: 2551 err_str = "resource"; 2552 break; 2553 } 2554 if (err_str && net_ratelimit()) 2555 netdev_err(port->dev, 2556 "bad rx status %08x (%s error), size=%zu\n", 2557 status, err_str, sz); 2558 } 2559 2560 /* Handle RX checksum offload */ 2561 static void mvpp2_rx_csum(struct mvpp2_port *port, u32 status, 2562 struct sk_buff *skb) 2563 { 2564 if (((status & MVPP2_RXD_L3_IP4) && 2565 !(status & MVPP2_RXD_IP4_HEADER_ERR)) || 2566 (status & MVPP2_RXD_L3_IP6)) 2567 if (((status & MVPP2_RXD_L4_UDP) || 2568 (status & MVPP2_RXD_L4_TCP)) && 2569 (status & MVPP2_RXD_L4_CSUM_OK)) { 2570 skb->csum = 0; 2571 skb->ip_summed = CHECKSUM_UNNECESSARY; 2572 return; 2573 } 2574 2575 skb->ip_summed = CHECKSUM_NONE; 2576 } 2577 2578 /* Reuse skb if possible, or allocate a new skb and add it to BM pool */ 2579 static int mvpp2_rx_refill(struct mvpp2_port *port, 2580 struct mvpp2_bm_pool *bm_pool, int pool) 2581 { 2582 dma_addr_t dma_addr; 2583 phys_addr_t phys_addr; 2584 void *buf; 2585 2586 /* No recycle or too many buffers are in use, so allocate a new skb */ 2587 buf = mvpp2_buf_alloc(port, bm_pool, &dma_addr, &phys_addr, 2588 GFP_ATOMIC); 2589 if (!buf) 2590 return -ENOMEM; 2591 2592 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 2593 2594 return 0; 2595 } 2596 2597 /* Handle tx checksum */ 2598 static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb) 2599 { 2600 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2601 int ip_hdr_len = 0; 2602 u8 l4_proto; 2603 __be16 l3_proto = vlan_get_protocol(skb); 2604 2605 if (l3_proto == htons(ETH_P_IP)) { 2606 struct iphdr *ip4h = ip_hdr(skb); 2607 2608 /* Calculate IPv4 checksum and L4 checksum */ 2609 ip_hdr_len = ip4h->ihl; 2610 l4_proto = ip4h->protocol; 2611 } else if (l3_proto == htons(ETH_P_IPV6)) { 2612 struct ipv6hdr *ip6h = ipv6_hdr(skb); 2613 2614 /* Read l4_protocol from one of IPv6 extra headers */ 2615 if (skb_network_header_len(skb) > 0) 2616 ip_hdr_len = (skb_network_header_len(skb) >> 2); 2617 l4_proto = ip6h->nexthdr; 2618 } else { 2619 return MVPP2_TXD_L4_CSUM_NOT; 2620 } 2621 2622 return mvpp2_txq_desc_csum(skb_network_offset(skb), 2623 l3_proto, ip_hdr_len, l4_proto); 2624 } 2625 2626 return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE; 2627 } 2628 2629 /* Main rx processing */ 2630 static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi, 2631 int rx_todo, struct mvpp2_rx_queue *rxq) 2632 { 2633 struct net_device *dev = port->dev; 2634 int rx_received; 2635 int rx_done = 0; 2636 u32 rcvd_pkts = 0; 2637 u32 rcvd_bytes = 0; 2638 2639 /* Get number of received packets and clamp the to-do */ 2640 rx_received = mvpp2_rxq_received(port, rxq->id); 2641 if (rx_todo > rx_received) 2642 rx_todo = rx_received; 2643 2644 while (rx_done < rx_todo) { 2645 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 2646 struct mvpp2_bm_pool *bm_pool; 2647 struct sk_buff *skb; 2648 unsigned int frag_size; 2649 dma_addr_t dma_addr; 2650 phys_addr_t phys_addr; 2651 u32 rx_status; 2652 int pool, rx_bytes, err; 2653 void *data; 2654 2655 rx_done++; 2656 rx_status = mvpp2_rxdesc_status_get(port, rx_desc); 2657 rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc); 2658 rx_bytes -= MVPP2_MH_SIZE; 2659 dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 2660 phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 2661 data = (void *)phys_to_virt(phys_addr); 2662 2663 pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >> 2664 MVPP2_RXD_BM_POOL_ID_OFFS; 2665 bm_pool = &port->priv->bm_pools[pool]; 2666 2667 /* In case of an error, release the requested buffer pointer 2668 * to the Buffer Manager. This request process is controlled 2669 * by the hardware, and the information about the buffer is 2670 * comprised by the RX descriptor. 2671 */ 2672 if (rx_status & MVPP2_RXD_ERR_SUMMARY) { 2673 err_drop_frame: 2674 dev->stats.rx_errors++; 2675 mvpp2_rx_error(port, rx_desc); 2676 /* Return the buffer to the pool */ 2677 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 2678 continue; 2679 } 2680 2681 if (bm_pool->frag_size > PAGE_SIZE) 2682 frag_size = 0; 2683 else 2684 frag_size = bm_pool->frag_size; 2685 2686 skb = build_skb(data, frag_size); 2687 if (!skb) { 2688 netdev_warn(port->dev, "skb build failed\n"); 2689 goto err_drop_frame; 2690 } 2691 2692 err = mvpp2_rx_refill(port, bm_pool, pool); 2693 if (err) { 2694 netdev_err(port->dev, "failed to refill BM pools\n"); 2695 goto err_drop_frame; 2696 } 2697 2698 dma_unmap_single(dev->dev.parent, dma_addr, 2699 bm_pool->buf_size, DMA_FROM_DEVICE); 2700 2701 rcvd_pkts++; 2702 rcvd_bytes += rx_bytes; 2703 2704 skb_reserve(skb, MVPP2_MH_SIZE + NET_SKB_PAD); 2705 skb_put(skb, rx_bytes); 2706 skb->protocol = eth_type_trans(skb, dev); 2707 mvpp2_rx_csum(port, rx_status, skb); 2708 2709 napi_gro_receive(napi, skb); 2710 } 2711 2712 if (rcvd_pkts) { 2713 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 2714 2715 u64_stats_update_begin(&stats->syncp); 2716 stats->rx_packets += rcvd_pkts; 2717 stats->rx_bytes += rcvd_bytes; 2718 u64_stats_update_end(&stats->syncp); 2719 } 2720 2721 /* Update Rx queue management counters */ 2722 wmb(); 2723 mvpp2_rxq_status_update(port, rxq->id, rx_done, rx_done); 2724 2725 return rx_todo; 2726 } 2727 2728 static inline void 2729 tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 2730 struct mvpp2_tx_desc *desc) 2731 { 2732 struct mvpp2_txq_pcpu *txq_pcpu = this_cpu_ptr(txq->pcpu); 2733 2734 dma_addr_t buf_dma_addr = 2735 mvpp2_txdesc_dma_addr_get(port, desc); 2736 size_t buf_sz = 2737 mvpp2_txdesc_size_get(port, desc); 2738 if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr)) 2739 dma_unmap_single(port->dev->dev.parent, buf_dma_addr, 2740 buf_sz, DMA_TO_DEVICE); 2741 mvpp2_txq_desc_put(txq); 2742 } 2743 2744 /* Handle tx fragmentation processing */ 2745 static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb, 2746 struct mvpp2_tx_queue *aggr_txq, 2747 struct mvpp2_tx_queue *txq) 2748 { 2749 struct mvpp2_txq_pcpu *txq_pcpu = this_cpu_ptr(txq->pcpu); 2750 struct mvpp2_tx_desc *tx_desc; 2751 int i; 2752 dma_addr_t buf_dma_addr; 2753 2754 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2755 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2756 void *addr = page_address(frag->page.p) + frag->page_offset; 2757 2758 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 2759 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 2760 mvpp2_txdesc_size_set(port, tx_desc, frag->size); 2761 2762 buf_dma_addr = dma_map_single(port->dev->dev.parent, addr, 2763 frag->size, DMA_TO_DEVICE); 2764 if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) { 2765 mvpp2_txq_desc_put(txq); 2766 goto cleanup; 2767 } 2768 2769 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 2770 2771 if (i == (skb_shinfo(skb)->nr_frags - 1)) { 2772 /* Last descriptor */ 2773 mvpp2_txdesc_cmd_set(port, tx_desc, 2774 MVPP2_TXD_L_DESC); 2775 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc); 2776 } else { 2777 /* Descriptor in the middle: Not First, Not Last */ 2778 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 2779 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc); 2780 } 2781 } 2782 2783 return 0; 2784 cleanup: 2785 /* Release all descriptors that were used to map fragments of 2786 * this packet, as well as the corresponding DMA mappings 2787 */ 2788 for (i = i - 1; i >= 0; i--) { 2789 tx_desc = txq->descs + i; 2790 tx_desc_unmap_put(port, txq, tx_desc); 2791 } 2792 2793 return -ENOMEM; 2794 } 2795 2796 static inline void mvpp2_tso_put_hdr(struct sk_buff *skb, 2797 struct net_device *dev, 2798 struct mvpp2_tx_queue *txq, 2799 struct mvpp2_tx_queue *aggr_txq, 2800 struct mvpp2_txq_pcpu *txq_pcpu, 2801 int hdr_sz) 2802 { 2803 struct mvpp2_port *port = netdev_priv(dev); 2804 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 2805 dma_addr_t addr; 2806 2807 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 2808 mvpp2_txdesc_size_set(port, tx_desc, hdr_sz); 2809 2810 addr = txq_pcpu->tso_headers_dma + 2811 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 2812 mvpp2_txdesc_dma_addr_set(port, tx_desc, addr); 2813 2814 mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) | 2815 MVPP2_TXD_F_DESC | 2816 MVPP2_TXD_PADDING_DISABLE); 2817 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc); 2818 } 2819 2820 static inline int mvpp2_tso_put_data(struct sk_buff *skb, 2821 struct net_device *dev, struct tso_t *tso, 2822 struct mvpp2_tx_queue *txq, 2823 struct mvpp2_tx_queue *aggr_txq, 2824 struct mvpp2_txq_pcpu *txq_pcpu, 2825 int sz, bool left, bool last) 2826 { 2827 struct mvpp2_port *port = netdev_priv(dev); 2828 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 2829 dma_addr_t buf_dma_addr; 2830 2831 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 2832 mvpp2_txdesc_size_set(port, tx_desc, sz); 2833 2834 buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz, 2835 DMA_TO_DEVICE); 2836 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 2837 mvpp2_txq_desc_put(txq); 2838 return -ENOMEM; 2839 } 2840 2841 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 2842 2843 if (!left) { 2844 mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC); 2845 if (last) { 2846 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc); 2847 return 0; 2848 } 2849 } else { 2850 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 2851 } 2852 2853 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc); 2854 return 0; 2855 } 2856 2857 static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev, 2858 struct mvpp2_tx_queue *txq, 2859 struct mvpp2_tx_queue *aggr_txq, 2860 struct mvpp2_txq_pcpu *txq_pcpu) 2861 { 2862 struct mvpp2_port *port = netdev_priv(dev); 2863 struct tso_t tso; 2864 int hdr_sz = skb_transport_offset(skb) + tcp_hdrlen(skb); 2865 int i, len, descs = 0; 2866 2867 /* Check number of available descriptors */ 2868 if (mvpp2_aggr_desc_num_check(port->priv, aggr_txq, 2869 tso_count_descs(skb)) || 2870 mvpp2_txq_reserved_desc_num_proc(port->priv, txq, txq_pcpu, 2871 tso_count_descs(skb))) 2872 return 0; 2873 2874 tso_start(skb, &tso); 2875 len = skb->len - hdr_sz; 2876 while (len > 0) { 2877 int left = min_t(int, skb_shinfo(skb)->gso_size, len); 2878 char *hdr = txq_pcpu->tso_headers + 2879 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 2880 2881 len -= left; 2882 descs++; 2883 2884 tso_build_hdr(skb, hdr, &tso, left, len == 0); 2885 mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz); 2886 2887 while (left > 0) { 2888 int sz = min_t(int, tso.size, left); 2889 left -= sz; 2890 descs++; 2891 2892 if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq, 2893 txq_pcpu, sz, left, len == 0)) 2894 goto release; 2895 tso_build_data(skb, &tso, sz); 2896 } 2897 } 2898 2899 return descs; 2900 2901 release: 2902 for (i = descs - 1; i >= 0; i--) { 2903 struct mvpp2_tx_desc *tx_desc = txq->descs + i; 2904 tx_desc_unmap_put(port, txq, tx_desc); 2905 } 2906 return 0; 2907 } 2908 2909 /* Main tx processing */ 2910 static int mvpp2_tx(struct sk_buff *skb, struct net_device *dev) 2911 { 2912 struct mvpp2_port *port = netdev_priv(dev); 2913 struct mvpp2_tx_queue *txq, *aggr_txq; 2914 struct mvpp2_txq_pcpu *txq_pcpu; 2915 struct mvpp2_tx_desc *tx_desc; 2916 dma_addr_t buf_dma_addr; 2917 int frags = 0; 2918 u16 txq_id; 2919 u32 tx_cmd; 2920 2921 txq_id = skb_get_queue_mapping(skb); 2922 txq = port->txqs[txq_id]; 2923 txq_pcpu = this_cpu_ptr(txq->pcpu); 2924 aggr_txq = &port->priv->aggr_txqs[smp_processor_id()]; 2925 2926 if (skb_is_gso(skb)) { 2927 frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu); 2928 goto out; 2929 } 2930 frags = skb_shinfo(skb)->nr_frags + 1; 2931 2932 /* Check number of available descriptors */ 2933 if (mvpp2_aggr_desc_num_check(port->priv, aggr_txq, frags) || 2934 mvpp2_txq_reserved_desc_num_proc(port->priv, txq, 2935 txq_pcpu, frags)) { 2936 frags = 0; 2937 goto out; 2938 } 2939 2940 /* Get a descriptor for the first part of the packet */ 2941 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 2942 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 2943 mvpp2_txdesc_size_set(port, tx_desc, skb_headlen(skb)); 2944 2945 buf_dma_addr = dma_map_single(dev->dev.parent, skb->data, 2946 skb_headlen(skb), DMA_TO_DEVICE); 2947 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 2948 mvpp2_txq_desc_put(txq); 2949 frags = 0; 2950 goto out; 2951 } 2952 2953 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 2954 2955 tx_cmd = mvpp2_skb_tx_csum(port, skb); 2956 2957 if (frags == 1) { 2958 /* First and Last descriptor */ 2959 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 2960 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 2961 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc); 2962 } else { 2963 /* First but not Last */ 2964 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE; 2965 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 2966 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc); 2967 2968 /* Continue with other skb fragments */ 2969 if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) { 2970 tx_desc_unmap_put(port, txq, tx_desc); 2971 frags = 0; 2972 } 2973 } 2974 2975 out: 2976 if (frags > 0) { 2977 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 2978 struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); 2979 2980 txq_pcpu->reserved_num -= frags; 2981 txq_pcpu->count += frags; 2982 aggr_txq->count += frags; 2983 2984 /* Enable transmit */ 2985 wmb(); 2986 mvpp2_aggr_txq_pend_desc_add(port, frags); 2987 2988 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 2989 netif_tx_stop_queue(nq); 2990 2991 u64_stats_update_begin(&stats->syncp); 2992 stats->tx_packets++; 2993 stats->tx_bytes += skb->len; 2994 u64_stats_update_end(&stats->syncp); 2995 } else { 2996 dev->stats.tx_dropped++; 2997 dev_kfree_skb_any(skb); 2998 } 2999 3000 /* Finalize TX processing */ 3001 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 3002 mvpp2_txq_done(port, txq, txq_pcpu); 3003 3004 /* Set the timer in case not all frags were processed */ 3005 if (!port->has_tx_irqs && txq_pcpu->count <= frags && 3006 txq_pcpu->count > 0) { 3007 struct mvpp2_port_pcpu *port_pcpu = this_cpu_ptr(port->pcpu); 3008 3009 mvpp2_timer_set(port_pcpu); 3010 } 3011 3012 return NETDEV_TX_OK; 3013 } 3014 3015 static inline void mvpp2_cause_error(struct net_device *dev, int cause) 3016 { 3017 if (cause & MVPP2_CAUSE_FCS_ERR_MASK) 3018 netdev_err(dev, "FCS error\n"); 3019 if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK) 3020 netdev_err(dev, "rx fifo overrun error\n"); 3021 if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK) 3022 netdev_err(dev, "tx fifo underrun error\n"); 3023 } 3024 3025 static int mvpp2_poll(struct napi_struct *napi, int budget) 3026 { 3027 u32 cause_rx_tx, cause_rx, cause_tx, cause_misc; 3028 int rx_done = 0; 3029 struct mvpp2_port *port = netdev_priv(napi->dev); 3030 struct mvpp2_queue_vector *qv; 3031 int cpu = smp_processor_id(); 3032 3033 qv = container_of(napi, struct mvpp2_queue_vector, napi); 3034 3035 /* Rx/Tx cause register 3036 * 3037 * Bits 0-15: each bit indicates received packets on the Rx queue 3038 * (bit 0 is for Rx queue 0). 3039 * 3040 * Bits 16-23: each bit indicates transmitted packets on the Tx queue 3041 * (bit 16 is for Tx queue 0). 3042 * 3043 * Each CPU has its own Rx/Tx cause register 3044 */ 3045 cause_rx_tx = mvpp2_percpu_read_relaxed(port->priv, qv->sw_thread_id, 3046 MVPP2_ISR_RX_TX_CAUSE_REG(port->id)); 3047 3048 cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK; 3049 if (cause_misc) { 3050 mvpp2_cause_error(port->dev, cause_misc); 3051 3052 /* Clear the cause register */ 3053 mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0); 3054 mvpp2_percpu_write(port->priv, cpu, 3055 MVPP2_ISR_RX_TX_CAUSE_REG(port->id), 3056 cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK); 3057 } 3058 3059 if (port->has_tx_irqs) { 3060 cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 3061 if (cause_tx) { 3062 cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET; 3063 mvpp2_tx_done(port, cause_tx, qv->sw_thread_id); 3064 } 3065 } 3066 3067 /* Process RX packets */ 3068 cause_rx = cause_rx_tx & MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK; 3069 cause_rx <<= qv->first_rxq; 3070 cause_rx |= qv->pending_cause_rx; 3071 while (cause_rx && budget > 0) { 3072 int count; 3073 struct mvpp2_rx_queue *rxq; 3074 3075 rxq = mvpp2_get_rx_queue(port, cause_rx); 3076 if (!rxq) 3077 break; 3078 3079 count = mvpp2_rx(port, napi, budget, rxq); 3080 rx_done += count; 3081 budget -= count; 3082 if (budget > 0) { 3083 /* Clear the bit associated to this Rx queue 3084 * so that next iteration will continue from 3085 * the next Rx queue. 3086 */ 3087 cause_rx &= ~(1 << rxq->logic_rxq); 3088 } 3089 } 3090 3091 if (budget > 0) { 3092 cause_rx = 0; 3093 napi_complete_done(napi, rx_done); 3094 3095 mvpp2_qvec_interrupt_enable(qv); 3096 } 3097 qv->pending_cause_rx = cause_rx; 3098 return rx_done; 3099 } 3100 3101 static void mvpp22_mode_reconfigure(struct mvpp2_port *port) 3102 { 3103 u32 ctrl3; 3104 3105 /* comphy reconfiguration */ 3106 mvpp22_comphy_init(port); 3107 3108 /* gop reconfiguration */ 3109 mvpp22_gop_init(port); 3110 3111 /* Only GOP port 0 has an XLG MAC */ 3112 if (port->gop_id == 0) { 3113 ctrl3 = readl(port->base + MVPP22_XLG_CTRL3_REG); 3114 ctrl3 &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 3115 3116 if (port->phy_interface == PHY_INTERFACE_MODE_XAUI || 3117 port->phy_interface == PHY_INTERFACE_MODE_10GKR) 3118 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_10G; 3119 else 3120 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC; 3121 3122 writel(ctrl3, port->base + MVPP22_XLG_CTRL3_REG); 3123 } 3124 3125 if (port->gop_id == 0 && 3126 (port->phy_interface == PHY_INTERFACE_MODE_XAUI || 3127 port->phy_interface == PHY_INTERFACE_MODE_10GKR)) 3128 mvpp2_xlg_max_rx_size_set(port); 3129 else 3130 mvpp2_gmac_max_rx_size_set(port); 3131 } 3132 3133 /* Set hw internals when starting port */ 3134 static void mvpp2_start_dev(struct mvpp2_port *port) 3135 { 3136 int i; 3137 3138 mvpp2_txp_max_tx_size_set(port); 3139 3140 for (i = 0; i < port->nqvecs; i++) 3141 napi_enable(&port->qvecs[i].napi); 3142 3143 /* Enable interrupts on all CPUs */ 3144 mvpp2_interrupts_enable(port); 3145 3146 if (port->priv->hw_version == MVPP22) 3147 mvpp22_mode_reconfigure(port); 3148 3149 if (port->phylink) { 3150 netif_carrier_off(port->dev); 3151 phylink_start(port->phylink); 3152 } else { 3153 /* Phylink isn't used as of now for ACPI, so the MAC has to be 3154 * configured manually when the interface is started. This will 3155 * be removed as soon as the phylink ACPI support lands in. 3156 */ 3157 struct phylink_link_state state = { 3158 .interface = port->phy_interface, 3159 }; 3160 mvpp2_mac_config(port->dev, MLO_AN_INBAND, &state); 3161 mvpp2_mac_link_up(port->dev, MLO_AN_INBAND, port->phy_interface, 3162 NULL); 3163 } 3164 3165 netif_tx_start_all_queues(port->dev); 3166 } 3167 3168 /* Set hw internals when stopping port */ 3169 static void mvpp2_stop_dev(struct mvpp2_port *port) 3170 { 3171 int i; 3172 3173 /* Disable interrupts on all CPUs */ 3174 mvpp2_interrupts_disable(port); 3175 3176 for (i = 0; i < port->nqvecs; i++) 3177 napi_disable(&port->qvecs[i].napi); 3178 3179 if (port->phylink) 3180 phylink_stop(port->phylink); 3181 phy_power_off(port->comphy); 3182 } 3183 3184 static int mvpp2_check_ringparam_valid(struct net_device *dev, 3185 struct ethtool_ringparam *ring) 3186 { 3187 u16 new_rx_pending = ring->rx_pending; 3188 u16 new_tx_pending = ring->tx_pending; 3189 3190 if (ring->rx_pending == 0 || ring->tx_pending == 0) 3191 return -EINVAL; 3192 3193 if (ring->rx_pending > MVPP2_MAX_RXD_MAX) 3194 new_rx_pending = MVPP2_MAX_RXD_MAX; 3195 else if (!IS_ALIGNED(ring->rx_pending, 16)) 3196 new_rx_pending = ALIGN(ring->rx_pending, 16); 3197 3198 if (ring->tx_pending > MVPP2_MAX_TXD_MAX) 3199 new_tx_pending = MVPP2_MAX_TXD_MAX; 3200 else if (!IS_ALIGNED(ring->tx_pending, 32)) 3201 new_tx_pending = ALIGN(ring->tx_pending, 32); 3202 3203 /* The Tx ring size cannot be smaller than the minimum number of 3204 * descriptors needed for TSO. 3205 */ 3206 if (new_tx_pending < MVPP2_MAX_SKB_DESCS) 3207 new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32); 3208 3209 if (ring->rx_pending != new_rx_pending) { 3210 netdev_info(dev, "illegal Rx ring size value %d, round to %d\n", 3211 ring->rx_pending, new_rx_pending); 3212 ring->rx_pending = new_rx_pending; 3213 } 3214 3215 if (ring->tx_pending != new_tx_pending) { 3216 netdev_info(dev, "illegal Tx ring size value %d, round to %d\n", 3217 ring->tx_pending, new_tx_pending); 3218 ring->tx_pending = new_tx_pending; 3219 } 3220 3221 return 0; 3222 } 3223 3224 static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr) 3225 { 3226 u32 mac_addr_l, mac_addr_m, mac_addr_h; 3227 3228 mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 3229 mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE); 3230 mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH); 3231 addr[0] = (mac_addr_h >> 24) & 0xFF; 3232 addr[1] = (mac_addr_h >> 16) & 0xFF; 3233 addr[2] = (mac_addr_h >> 8) & 0xFF; 3234 addr[3] = mac_addr_h & 0xFF; 3235 addr[4] = mac_addr_m & 0xFF; 3236 addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF; 3237 } 3238 3239 static int mvpp2_irqs_init(struct mvpp2_port *port) 3240 { 3241 int err, i; 3242 3243 for (i = 0; i < port->nqvecs; i++) { 3244 struct mvpp2_queue_vector *qv = port->qvecs + i; 3245 3246 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) 3247 irq_set_status_flags(qv->irq, IRQ_NO_BALANCING); 3248 3249 err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv); 3250 if (err) 3251 goto err; 3252 3253 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) 3254 irq_set_affinity_hint(qv->irq, 3255 cpumask_of(qv->sw_thread_id)); 3256 } 3257 3258 return 0; 3259 err: 3260 for (i = 0; i < port->nqvecs; i++) { 3261 struct mvpp2_queue_vector *qv = port->qvecs + i; 3262 3263 irq_set_affinity_hint(qv->irq, NULL); 3264 free_irq(qv->irq, qv); 3265 } 3266 3267 return err; 3268 } 3269 3270 static void mvpp2_irqs_deinit(struct mvpp2_port *port) 3271 { 3272 int i; 3273 3274 for (i = 0; i < port->nqvecs; i++) { 3275 struct mvpp2_queue_vector *qv = port->qvecs + i; 3276 3277 irq_set_affinity_hint(qv->irq, NULL); 3278 irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING); 3279 free_irq(qv->irq, qv); 3280 } 3281 } 3282 3283 static bool mvpp22_rss_is_supported(void) 3284 { 3285 return queue_mode == MVPP2_QDIST_MULTI_MODE; 3286 } 3287 3288 static int mvpp2_open(struct net_device *dev) 3289 { 3290 struct mvpp2_port *port = netdev_priv(dev); 3291 struct mvpp2 *priv = port->priv; 3292 unsigned char mac_bcast[ETH_ALEN] = { 3293 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 3294 bool valid = false; 3295 int err; 3296 3297 err = mvpp2_prs_mac_da_accept(port, mac_bcast, true); 3298 if (err) { 3299 netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n"); 3300 return err; 3301 } 3302 err = mvpp2_prs_mac_da_accept(port, dev->dev_addr, true); 3303 if (err) { 3304 netdev_err(dev, "mvpp2_prs_mac_da_accept own addr failed\n"); 3305 return err; 3306 } 3307 err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH); 3308 if (err) { 3309 netdev_err(dev, "mvpp2_prs_tag_mode_set failed\n"); 3310 return err; 3311 } 3312 err = mvpp2_prs_def_flow(port); 3313 if (err) { 3314 netdev_err(dev, "mvpp2_prs_def_flow failed\n"); 3315 return err; 3316 } 3317 3318 /* Allocate the Rx/Tx queues */ 3319 err = mvpp2_setup_rxqs(port); 3320 if (err) { 3321 netdev_err(port->dev, "cannot allocate Rx queues\n"); 3322 return err; 3323 } 3324 3325 err = mvpp2_setup_txqs(port); 3326 if (err) { 3327 netdev_err(port->dev, "cannot allocate Tx queues\n"); 3328 goto err_cleanup_rxqs; 3329 } 3330 3331 err = mvpp2_irqs_init(port); 3332 if (err) { 3333 netdev_err(port->dev, "cannot init IRQs\n"); 3334 goto err_cleanup_txqs; 3335 } 3336 3337 /* Phylink isn't supported yet in ACPI mode */ 3338 if (port->of_node) { 3339 err = phylink_of_phy_connect(port->phylink, port->of_node, 0); 3340 if (err) { 3341 netdev_err(port->dev, "could not attach PHY (%d)\n", 3342 err); 3343 goto err_free_irq; 3344 } 3345 3346 valid = true; 3347 } 3348 3349 if (priv->hw_version == MVPP22 && port->link_irq && !port->phylink) { 3350 err = request_irq(port->link_irq, mvpp2_link_status_isr, 0, 3351 dev->name, port); 3352 if (err) { 3353 netdev_err(port->dev, "cannot request link IRQ %d\n", 3354 port->link_irq); 3355 goto err_free_irq; 3356 } 3357 3358 mvpp22_gop_setup_irq(port); 3359 3360 /* In default link is down */ 3361 netif_carrier_off(port->dev); 3362 3363 valid = true; 3364 } else { 3365 port->link_irq = 0; 3366 } 3367 3368 if (!valid) { 3369 netdev_err(port->dev, 3370 "invalid configuration: no dt or link IRQ"); 3371 goto err_free_irq; 3372 } 3373 3374 /* Unmask interrupts on all CPUs */ 3375 on_each_cpu(mvpp2_interrupts_unmask, port, 1); 3376 mvpp2_shared_interrupt_mask_unmask(port, false); 3377 3378 mvpp2_start_dev(port); 3379 3380 /* Start hardware statistics gathering */ 3381 queue_delayed_work(priv->stats_queue, &port->stats_work, 3382 MVPP2_MIB_COUNTERS_STATS_DELAY); 3383 3384 return 0; 3385 3386 err_free_irq: 3387 mvpp2_irqs_deinit(port); 3388 err_cleanup_txqs: 3389 mvpp2_cleanup_txqs(port); 3390 err_cleanup_rxqs: 3391 mvpp2_cleanup_rxqs(port); 3392 return err; 3393 } 3394 3395 static int mvpp2_stop(struct net_device *dev) 3396 { 3397 struct mvpp2_port *port = netdev_priv(dev); 3398 struct mvpp2_port_pcpu *port_pcpu; 3399 int cpu; 3400 3401 mvpp2_stop_dev(port); 3402 3403 /* Mask interrupts on all CPUs */ 3404 on_each_cpu(mvpp2_interrupts_mask, port, 1); 3405 mvpp2_shared_interrupt_mask_unmask(port, true); 3406 3407 if (port->phylink) 3408 phylink_disconnect_phy(port->phylink); 3409 if (port->link_irq) 3410 free_irq(port->link_irq, port); 3411 3412 mvpp2_irqs_deinit(port); 3413 if (!port->has_tx_irqs) { 3414 for_each_present_cpu(cpu) { 3415 port_pcpu = per_cpu_ptr(port->pcpu, cpu); 3416 3417 hrtimer_cancel(&port_pcpu->tx_done_timer); 3418 port_pcpu->timer_scheduled = false; 3419 tasklet_kill(&port_pcpu->tx_done_tasklet); 3420 } 3421 } 3422 mvpp2_cleanup_rxqs(port); 3423 mvpp2_cleanup_txqs(port); 3424 3425 cancel_delayed_work_sync(&port->stats_work); 3426 3427 return 0; 3428 } 3429 3430 static int mvpp2_prs_mac_da_accept_list(struct mvpp2_port *port, 3431 struct netdev_hw_addr_list *list) 3432 { 3433 struct netdev_hw_addr *ha; 3434 int ret; 3435 3436 netdev_hw_addr_list_for_each(ha, list) { 3437 ret = mvpp2_prs_mac_da_accept(port, ha->addr, true); 3438 if (ret) 3439 return ret; 3440 } 3441 3442 return 0; 3443 } 3444 3445 static void mvpp2_set_rx_promisc(struct mvpp2_port *port, bool enable) 3446 { 3447 if (!enable && (port->dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 3448 mvpp2_prs_vid_enable_filtering(port); 3449 else 3450 mvpp2_prs_vid_disable_filtering(port); 3451 3452 mvpp2_prs_mac_promisc_set(port->priv, port->id, 3453 MVPP2_PRS_L2_UNI_CAST, enable); 3454 3455 mvpp2_prs_mac_promisc_set(port->priv, port->id, 3456 MVPP2_PRS_L2_MULTI_CAST, enable); 3457 } 3458 3459 static void mvpp2_set_rx_mode(struct net_device *dev) 3460 { 3461 struct mvpp2_port *port = netdev_priv(dev); 3462 3463 /* Clear the whole UC and MC list */ 3464 mvpp2_prs_mac_del_all(port); 3465 3466 if (dev->flags & IFF_PROMISC) { 3467 mvpp2_set_rx_promisc(port, true); 3468 return; 3469 } 3470 3471 mvpp2_set_rx_promisc(port, false); 3472 3473 if (netdev_uc_count(dev) > MVPP2_PRS_MAC_UC_FILT_MAX || 3474 mvpp2_prs_mac_da_accept_list(port, &dev->uc)) 3475 mvpp2_prs_mac_promisc_set(port->priv, port->id, 3476 MVPP2_PRS_L2_UNI_CAST, true); 3477 3478 if (dev->flags & IFF_ALLMULTI) { 3479 mvpp2_prs_mac_promisc_set(port->priv, port->id, 3480 MVPP2_PRS_L2_MULTI_CAST, true); 3481 return; 3482 } 3483 3484 if (netdev_mc_count(dev) > MVPP2_PRS_MAC_MC_FILT_MAX || 3485 mvpp2_prs_mac_da_accept_list(port, &dev->mc)) 3486 mvpp2_prs_mac_promisc_set(port->priv, port->id, 3487 MVPP2_PRS_L2_MULTI_CAST, true); 3488 } 3489 3490 static int mvpp2_set_mac_address(struct net_device *dev, void *p) 3491 { 3492 const struct sockaddr *addr = p; 3493 int err; 3494 3495 if (!is_valid_ether_addr(addr->sa_data)) 3496 return -EADDRNOTAVAIL; 3497 3498 err = mvpp2_prs_update_mac_da(dev, addr->sa_data); 3499 if (err) { 3500 /* Reconfigure parser accept the original MAC address */ 3501 mvpp2_prs_update_mac_da(dev, dev->dev_addr); 3502 netdev_err(dev, "failed to change MAC address\n"); 3503 } 3504 return err; 3505 } 3506 3507 static int mvpp2_change_mtu(struct net_device *dev, int mtu) 3508 { 3509 struct mvpp2_port *port = netdev_priv(dev); 3510 int err; 3511 3512 if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) { 3513 netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu, 3514 ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8)); 3515 mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8); 3516 } 3517 3518 if (!netif_running(dev)) { 3519 err = mvpp2_bm_update_mtu(dev, mtu); 3520 if (!err) { 3521 port->pkt_size = MVPP2_RX_PKT_SIZE(mtu); 3522 return 0; 3523 } 3524 3525 /* Reconfigure BM to the original MTU */ 3526 err = mvpp2_bm_update_mtu(dev, dev->mtu); 3527 if (err) 3528 goto log_error; 3529 } 3530 3531 mvpp2_stop_dev(port); 3532 3533 err = mvpp2_bm_update_mtu(dev, mtu); 3534 if (!err) { 3535 port->pkt_size = MVPP2_RX_PKT_SIZE(mtu); 3536 goto out_start; 3537 } 3538 3539 /* Reconfigure BM to the original MTU */ 3540 err = mvpp2_bm_update_mtu(dev, dev->mtu); 3541 if (err) 3542 goto log_error; 3543 3544 out_start: 3545 mvpp2_start_dev(port); 3546 mvpp2_egress_enable(port); 3547 mvpp2_ingress_enable(port); 3548 3549 return 0; 3550 log_error: 3551 netdev_err(dev, "failed to change MTU\n"); 3552 return err; 3553 } 3554 3555 static void 3556 mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 3557 { 3558 struct mvpp2_port *port = netdev_priv(dev); 3559 unsigned int start; 3560 int cpu; 3561 3562 for_each_possible_cpu(cpu) { 3563 struct mvpp2_pcpu_stats *cpu_stats; 3564 u64 rx_packets; 3565 u64 rx_bytes; 3566 u64 tx_packets; 3567 u64 tx_bytes; 3568 3569 cpu_stats = per_cpu_ptr(port->stats, cpu); 3570 do { 3571 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 3572 rx_packets = cpu_stats->rx_packets; 3573 rx_bytes = cpu_stats->rx_bytes; 3574 tx_packets = cpu_stats->tx_packets; 3575 tx_bytes = cpu_stats->tx_bytes; 3576 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 3577 3578 stats->rx_packets += rx_packets; 3579 stats->rx_bytes += rx_bytes; 3580 stats->tx_packets += tx_packets; 3581 stats->tx_bytes += tx_bytes; 3582 } 3583 3584 stats->rx_errors = dev->stats.rx_errors; 3585 stats->rx_dropped = dev->stats.rx_dropped; 3586 stats->tx_dropped = dev->stats.tx_dropped; 3587 } 3588 3589 static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 3590 { 3591 struct mvpp2_port *port = netdev_priv(dev); 3592 3593 if (!port->phylink) 3594 return -ENOTSUPP; 3595 3596 return phylink_mii_ioctl(port->phylink, ifr, cmd); 3597 } 3598 3599 static int mvpp2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 3600 { 3601 struct mvpp2_port *port = netdev_priv(dev); 3602 int ret; 3603 3604 ret = mvpp2_prs_vid_entry_add(port, vid); 3605 if (ret) 3606 netdev_err(dev, "rx-vlan-filter offloading cannot accept more than %d VIDs per port\n", 3607 MVPP2_PRS_VLAN_FILT_MAX - 1); 3608 return ret; 3609 } 3610 3611 static int mvpp2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 3612 { 3613 struct mvpp2_port *port = netdev_priv(dev); 3614 3615 mvpp2_prs_vid_entry_remove(port, vid); 3616 return 0; 3617 } 3618 3619 static int mvpp2_set_features(struct net_device *dev, 3620 netdev_features_t features) 3621 { 3622 netdev_features_t changed = dev->features ^ features; 3623 struct mvpp2_port *port = netdev_priv(dev); 3624 3625 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { 3626 if (features & NETIF_F_HW_VLAN_CTAG_FILTER) { 3627 mvpp2_prs_vid_enable_filtering(port); 3628 } else { 3629 /* Invalidate all registered VID filters for this 3630 * port 3631 */ 3632 mvpp2_prs_vid_remove_all(port); 3633 3634 mvpp2_prs_vid_disable_filtering(port); 3635 } 3636 } 3637 3638 if (changed & NETIF_F_RXHASH) { 3639 if (features & NETIF_F_RXHASH) 3640 mvpp22_rss_enable(port); 3641 else 3642 mvpp22_rss_disable(port); 3643 } 3644 3645 return 0; 3646 } 3647 3648 /* Ethtool methods */ 3649 3650 static int mvpp2_ethtool_nway_reset(struct net_device *dev) 3651 { 3652 struct mvpp2_port *port = netdev_priv(dev); 3653 3654 if (!port->phylink) 3655 return -ENOTSUPP; 3656 3657 return phylink_ethtool_nway_reset(port->phylink); 3658 } 3659 3660 /* Set interrupt coalescing for ethtools */ 3661 static int mvpp2_ethtool_set_coalesce(struct net_device *dev, 3662 struct ethtool_coalesce *c) 3663 { 3664 struct mvpp2_port *port = netdev_priv(dev); 3665 int queue; 3666 3667 for (queue = 0; queue < port->nrxqs; queue++) { 3668 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 3669 3670 rxq->time_coal = c->rx_coalesce_usecs; 3671 rxq->pkts_coal = c->rx_max_coalesced_frames; 3672 mvpp2_rx_pkts_coal_set(port, rxq); 3673 mvpp2_rx_time_coal_set(port, rxq); 3674 } 3675 3676 if (port->has_tx_irqs) { 3677 port->tx_time_coal = c->tx_coalesce_usecs; 3678 mvpp2_tx_time_coal_set(port); 3679 } 3680 3681 for (queue = 0; queue < port->ntxqs; queue++) { 3682 struct mvpp2_tx_queue *txq = port->txqs[queue]; 3683 3684 txq->done_pkts_coal = c->tx_max_coalesced_frames; 3685 3686 if (port->has_tx_irqs) 3687 mvpp2_tx_pkts_coal_set(port, txq); 3688 } 3689 3690 return 0; 3691 } 3692 3693 /* get coalescing for ethtools */ 3694 static int mvpp2_ethtool_get_coalesce(struct net_device *dev, 3695 struct ethtool_coalesce *c) 3696 { 3697 struct mvpp2_port *port = netdev_priv(dev); 3698 3699 c->rx_coalesce_usecs = port->rxqs[0]->time_coal; 3700 c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal; 3701 c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal; 3702 c->tx_coalesce_usecs = port->tx_time_coal; 3703 return 0; 3704 } 3705 3706 static void mvpp2_ethtool_get_drvinfo(struct net_device *dev, 3707 struct ethtool_drvinfo *drvinfo) 3708 { 3709 strlcpy(drvinfo->driver, MVPP2_DRIVER_NAME, 3710 sizeof(drvinfo->driver)); 3711 strlcpy(drvinfo->version, MVPP2_DRIVER_VERSION, 3712 sizeof(drvinfo->version)); 3713 strlcpy(drvinfo->bus_info, dev_name(&dev->dev), 3714 sizeof(drvinfo->bus_info)); 3715 } 3716 3717 static void mvpp2_ethtool_get_ringparam(struct net_device *dev, 3718 struct ethtool_ringparam *ring) 3719 { 3720 struct mvpp2_port *port = netdev_priv(dev); 3721 3722 ring->rx_max_pending = MVPP2_MAX_RXD_MAX; 3723 ring->tx_max_pending = MVPP2_MAX_TXD_MAX; 3724 ring->rx_pending = port->rx_ring_size; 3725 ring->tx_pending = port->tx_ring_size; 3726 } 3727 3728 static int mvpp2_ethtool_set_ringparam(struct net_device *dev, 3729 struct ethtool_ringparam *ring) 3730 { 3731 struct mvpp2_port *port = netdev_priv(dev); 3732 u16 prev_rx_ring_size = port->rx_ring_size; 3733 u16 prev_tx_ring_size = port->tx_ring_size; 3734 int err; 3735 3736 err = mvpp2_check_ringparam_valid(dev, ring); 3737 if (err) 3738 return err; 3739 3740 if (!netif_running(dev)) { 3741 port->rx_ring_size = ring->rx_pending; 3742 port->tx_ring_size = ring->tx_pending; 3743 return 0; 3744 } 3745 3746 /* The interface is running, so we have to force a 3747 * reallocation of the queues 3748 */ 3749 mvpp2_stop_dev(port); 3750 mvpp2_cleanup_rxqs(port); 3751 mvpp2_cleanup_txqs(port); 3752 3753 port->rx_ring_size = ring->rx_pending; 3754 port->tx_ring_size = ring->tx_pending; 3755 3756 err = mvpp2_setup_rxqs(port); 3757 if (err) { 3758 /* Reallocate Rx queues with the original ring size */ 3759 port->rx_ring_size = prev_rx_ring_size; 3760 ring->rx_pending = prev_rx_ring_size; 3761 err = mvpp2_setup_rxqs(port); 3762 if (err) 3763 goto err_out; 3764 } 3765 err = mvpp2_setup_txqs(port); 3766 if (err) { 3767 /* Reallocate Tx queues with the original ring size */ 3768 port->tx_ring_size = prev_tx_ring_size; 3769 ring->tx_pending = prev_tx_ring_size; 3770 err = mvpp2_setup_txqs(port); 3771 if (err) 3772 goto err_clean_rxqs; 3773 } 3774 3775 mvpp2_start_dev(port); 3776 mvpp2_egress_enable(port); 3777 mvpp2_ingress_enable(port); 3778 3779 return 0; 3780 3781 err_clean_rxqs: 3782 mvpp2_cleanup_rxqs(port); 3783 err_out: 3784 netdev_err(dev, "failed to change ring parameters"); 3785 return err; 3786 } 3787 3788 static void mvpp2_ethtool_get_pause_param(struct net_device *dev, 3789 struct ethtool_pauseparam *pause) 3790 { 3791 struct mvpp2_port *port = netdev_priv(dev); 3792 3793 if (!port->phylink) 3794 return; 3795 3796 phylink_ethtool_get_pauseparam(port->phylink, pause); 3797 } 3798 3799 static int mvpp2_ethtool_set_pause_param(struct net_device *dev, 3800 struct ethtool_pauseparam *pause) 3801 { 3802 struct mvpp2_port *port = netdev_priv(dev); 3803 3804 if (!port->phylink) 3805 return -ENOTSUPP; 3806 3807 return phylink_ethtool_set_pauseparam(port->phylink, pause); 3808 } 3809 3810 static int mvpp2_ethtool_get_link_ksettings(struct net_device *dev, 3811 struct ethtool_link_ksettings *cmd) 3812 { 3813 struct mvpp2_port *port = netdev_priv(dev); 3814 3815 if (!port->phylink) 3816 return -ENOTSUPP; 3817 3818 return phylink_ethtool_ksettings_get(port->phylink, cmd); 3819 } 3820 3821 static int mvpp2_ethtool_set_link_ksettings(struct net_device *dev, 3822 const struct ethtool_link_ksettings *cmd) 3823 { 3824 struct mvpp2_port *port = netdev_priv(dev); 3825 3826 if (!port->phylink) 3827 return -ENOTSUPP; 3828 3829 return phylink_ethtool_ksettings_set(port->phylink, cmd); 3830 } 3831 3832 static int mvpp2_ethtool_get_rxnfc(struct net_device *dev, 3833 struct ethtool_rxnfc *info, u32 *rules) 3834 { 3835 struct mvpp2_port *port = netdev_priv(dev); 3836 int ret = 0; 3837 3838 if (!mvpp22_rss_is_supported()) 3839 return -EOPNOTSUPP; 3840 3841 switch (info->cmd) { 3842 case ETHTOOL_GRXFH: 3843 ret = mvpp2_ethtool_rxfh_get(port, info); 3844 break; 3845 case ETHTOOL_GRXRINGS: 3846 info->data = port->nrxqs; 3847 break; 3848 default: 3849 return -ENOTSUPP; 3850 } 3851 3852 return ret; 3853 } 3854 3855 static int mvpp2_ethtool_set_rxnfc(struct net_device *dev, 3856 struct ethtool_rxnfc *info) 3857 { 3858 struct mvpp2_port *port = netdev_priv(dev); 3859 int ret = 0; 3860 3861 if (!mvpp22_rss_is_supported()) 3862 return -EOPNOTSUPP; 3863 3864 switch (info->cmd) { 3865 case ETHTOOL_SRXFH: 3866 ret = mvpp2_ethtool_rxfh_set(port, info); 3867 break; 3868 default: 3869 return -EOPNOTSUPP; 3870 } 3871 return ret; 3872 } 3873 3874 static u32 mvpp2_ethtool_get_rxfh_indir_size(struct net_device *dev) 3875 { 3876 return mvpp22_rss_is_supported() ? MVPP22_RSS_TABLE_ENTRIES : 0; 3877 } 3878 3879 static int mvpp2_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, 3880 u8 *hfunc) 3881 { 3882 struct mvpp2_port *port = netdev_priv(dev); 3883 3884 if (!mvpp22_rss_is_supported()) 3885 return -EOPNOTSUPP; 3886 3887 if (indir) 3888 memcpy(indir, port->indir, 3889 ARRAY_SIZE(port->indir) * sizeof(port->indir[0])); 3890 3891 if (hfunc) 3892 *hfunc = ETH_RSS_HASH_CRC32; 3893 3894 return 0; 3895 } 3896 3897 static int mvpp2_ethtool_set_rxfh(struct net_device *dev, const u32 *indir, 3898 const u8 *key, const u8 hfunc) 3899 { 3900 struct mvpp2_port *port = netdev_priv(dev); 3901 3902 if (!mvpp22_rss_is_supported()) 3903 return -EOPNOTSUPP; 3904 3905 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32) 3906 return -EOPNOTSUPP; 3907 3908 if (key) 3909 return -EOPNOTSUPP; 3910 3911 if (indir) { 3912 memcpy(port->indir, indir, 3913 ARRAY_SIZE(port->indir) * sizeof(port->indir[0])); 3914 mvpp22_rss_fill_table(port, port->id); 3915 } 3916 3917 return 0; 3918 } 3919 3920 /* Device ops */ 3921 3922 static const struct net_device_ops mvpp2_netdev_ops = { 3923 .ndo_open = mvpp2_open, 3924 .ndo_stop = mvpp2_stop, 3925 .ndo_start_xmit = mvpp2_tx, 3926 .ndo_set_rx_mode = mvpp2_set_rx_mode, 3927 .ndo_set_mac_address = mvpp2_set_mac_address, 3928 .ndo_change_mtu = mvpp2_change_mtu, 3929 .ndo_get_stats64 = mvpp2_get_stats64, 3930 .ndo_do_ioctl = mvpp2_ioctl, 3931 .ndo_vlan_rx_add_vid = mvpp2_vlan_rx_add_vid, 3932 .ndo_vlan_rx_kill_vid = mvpp2_vlan_rx_kill_vid, 3933 .ndo_set_features = mvpp2_set_features, 3934 }; 3935 3936 static const struct ethtool_ops mvpp2_eth_tool_ops = { 3937 .nway_reset = mvpp2_ethtool_nway_reset, 3938 .get_link = ethtool_op_get_link, 3939 .set_coalesce = mvpp2_ethtool_set_coalesce, 3940 .get_coalesce = mvpp2_ethtool_get_coalesce, 3941 .get_drvinfo = mvpp2_ethtool_get_drvinfo, 3942 .get_ringparam = mvpp2_ethtool_get_ringparam, 3943 .set_ringparam = mvpp2_ethtool_set_ringparam, 3944 .get_strings = mvpp2_ethtool_get_strings, 3945 .get_ethtool_stats = mvpp2_ethtool_get_stats, 3946 .get_sset_count = mvpp2_ethtool_get_sset_count, 3947 .get_pauseparam = mvpp2_ethtool_get_pause_param, 3948 .set_pauseparam = mvpp2_ethtool_set_pause_param, 3949 .get_link_ksettings = mvpp2_ethtool_get_link_ksettings, 3950 .set_link_ksettings = mvpp2_ethtool_set_link_ksettings, 3951 .get_rxnfc = mvpp2_ethtool_get_rxnfc, 3952 .set_rxnfc = mvpp2_ethtool_set_rxnfc, 3953 .get_rxfh_indir_size = mvpp2_ethtool_get_rxfh_indir_size, 3954 .get_rxfh = mvpp2_ethtool_get_rxfh, 3955 .set_rxfh = mvpp2_ethtool_set_rxfh, 3956 3957 }; 3958 3959 /* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that 3960 * had a single IRQ defined per-port. 3961 */ 3962 static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port, 3963 struct device_node *port_node) 3964 { 3965 struct mvpp2_queue_vector *v = &port->qvecs[0]; 3966 3967 v->first_rxq = 0; 3968 v->nrxqs = port->nrxqs; 3969 v->type = MVPP2_QUEUE_VECTOR_SHARED; 3970 v->sw_thread_id = 0; 3971 v->sw_thread_mask = *cpumask_bits(cpu_online_mask); 3972 v->port = port; 3973 v->irq = irq_of_parse_and_map(port_node, 0); 3974 if (v->irq <= 0) 3975 return -EINVAL; 3976 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 3977 NAPI_POLL_WEIGHT); 3978 3979 port->nqvecs = 1; 3980 3981 return 0; 3982 } 3983 3984 static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port, 3985 struct device_node *port_node) 3986 { 3987 struct mvpp2_queue_vector *v; 3988 int i, ret; 3989 3990 port->nqvecs = num_possible_cpus(); 3991 if (queue_mode == MVPP2_QDIST_SINGLE_MODE) 3992 port->nqvecs += 1; 3993 3994 for (i = 0; i < port->nqvecs; i++) { 3995 char irqname[16]; 3996 3997 v = port->qvecs + i; 3998 3999 v->port = port; 4000 v->type = MVPP2_QUEUE_VECTOR_PRIVATE; 4001 v->sw_thread_id = i; 4002 v->sw_thread_mask = BIT(i); 4003 4004 snprintf(irqname, sizeof(irqname), "tx-cpu%d", i); 4005 4006 if (queue_mode == MVPP2_QDIST_MULTI_MODE) { 4007 v->first_rxq = i * MVPP2_DEFAULT_RXQ; 4008 v->nrxqs = MVPP2_DEFAULT_RXQ; 4009 } else if (queue_mode == MVPP2_QDIST_SINGLE_MODE && 4010 i == (port->nqvecs - 1)) { 4011 v->first_rxq = 0; 4012 v->nrxqs = port->nrxqs; 4013 v->type = MVPP2_QUEUE_VECTOR_SHARED; 4014 strncpy(irqname, "rx-shared", sizeof(irqname)); 4015 } 4016 4017 if (port_node) 4018 v->irq = of_irq_get_byname(port_node, irqname); 4019 else 4020 v->irq = fwnode_irq_get(port->fwnode, i); 4021 if (v->irq <= 0) { 4022 ret = -EINVAL; 4023 goto err; 4024 } 4025 4026 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 4027 NAPI_POLL_WEIGHT); 4028 } 4029 4030 return 0; 4031 4032 err: 4033 for (i = 0; i < port->nqvecs; i++) 4034 irq_dispose_mapping(port->qvecs[i].irq); 4035 return ret; 4036 } 4037 4038 static int mvpp2_queue_vectors_init(struct mvpp2_port *port, 4039 struct device_node *port_node) 4040 { 4041 if (port->has_tx_irqs) 4042 return mvpp2_multi_queue_vectors_init(port, port_node); 4043 else 4044 return mvpp2_simple_queue_vectors_init(port, port_node); 4045 } 4046 4047 static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port) 4048 { 4049 int i; 4050 4051 for (i = 0; i < port->nqvecs; i++) 4052 irq_dispose_mapping(port->qvecs[i].irq); 4053 } 4054 4055 /* Configure Rx queue group interrupt for this port */ 4056 static void mvpp2_rx_irqs_setup(struct mvpp2_port *port) 4057 { 4058 struct mvpp2 *priv = port->priv; 4059 u32 val; 4060 int i; 4061 4062 if (priv->hw_version == MVPP21) { 4063 mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id), 4064 port->nrxqs); 4065 return; 4066 } 4067 4068 /* Handle the more complicated PPv2.2 case */ 4069 for (i = 0; i < port->nqvecs; i++) { 4070 struct mvpp2_queue_vector *qv = port->qvecs + i; 4071 4072 if (!qv->nrxqs) 4073 continue; 4074 4075 val = qv->sw_thread_id; 4076 val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET; 4077 mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val); 4078 4079 val = qv->first_rxq; 4080 val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET; 4081 mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val); 4082 } 4083 } 4084 4085 /* Initialize port HW */ 4086 static int mvpp2_port_init(struct mvpp2_port *port) 4087 { 4088 struct device *dev = port->dev->dev.parent; 4089 struct mvpp2 *priv = port->priv; 4090 struct mvpp2_txq_pcpu *txq_pcpu; 4091 int queue, cpu, err; 4092 4093 /* Checks for hardware constraints */ 4094 if (port->first_rxq + port->nrxqs > 4095 MVPP2_MAX_PORTS * priv->max_port_rxqs) 4096 return -EINVAL; 4097 4098 if (port->nrxqs % MVPP2_DEFAULT_RXQ || 4099 port->nrxqs > priv->max_port_rxqs || port->ntxqs > MVPP2_MAX_TXQ) 4100 return -EINVAL; 4101 4102 /* Disable port */ 4103 mvpp2_egress_disable(port); 4104 mvpp2_port_disable(port); 4105 4106 port->tx_time_coal = MVPP2_TXDONE_COAL_USEC; 4107 4108 port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs), 4109 GFP_KERNEL); 4110 if (!port->txqs) 4111 return -ENOMEM; 4112 4113 /* Associate physical Tx queues to this port and initialize. 4114 * The mapping is predefined. 4115 */ 4116 for (queue = 0; queue < port->ntxqs; queue++) { 4117 int queue_phy_id = mvpp2_txq_phys(port->id, queue); 4118 struct mvpp2_tx_queue *txq; 4119 4120 txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL); 4121 if (!txq) { 4122 err = -ENOMEM; 4123 goto err_free_percpu; 4124 } 4125 4126 txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu); 4127 if (!txq->pcpu) { 4128 err = -ENOMEM; 4129 goto err_free_percpu; 4130 } 4131 4132 txq->id = queue_phy_id; 4133 txq->log_id = queue; 4134 txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH; 4135 for_each_present_cpu(cpu) { 4136 txq_pcpu = per_cpu_ptr(txq->pcpu, cpu); 4137 txq_pcpu->cpu = cpu; 4138 } 4139 4140 port->txqs[queue] = txq; 4141 } 4142 4143 port->rxqs = devm_kcalloc(dev, port->nrxqs, sizeof(*port->rxqs), 4144 GFP_KERNEL); 4145 if (!port->rxqs) { 4146 err = -ENOMEM; 4147 goto err_free_percpu; 4148 } 4149 4150 /* Allocate and initialize Rx queue for this port */ 4151 for (queue = 0; queue < port->nrxqs; queue++) { 4152 struct mvpp2_rx_queue *rxq; 4153 4154 /* Map physical Rx queue to port's logical Rx queue */ 4155 rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL); 4156 if (!rxq) { 4157 err = -ENOMEM; 4158 goto err_free_percpu; 4159 } 4160 /* Map this Rx queue to a physical queue */ 4161 rxq->id = port->first_rxq + queue; 4162 rxq->port = port->id; 4163 rxq->logic_rxq = queue; 4164 4165 port->rxqs[queue] = rxq; 4166 } 4167 4168 mvpp2_rx_irqs_setup(port); 4169 4170 /* Create Rx descriptor rings */ 4171 for (queue = 0; queue < port->nrxqs; queue++) { 4172 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 4173 4174 rxq->size = port->rx_ring_size; 4175 rxq->pkts_coal = MVPP2_RX_COAL_PKTS; 4176 rxq->time_coal = MVPP2_RX_COAL_USEC; 4177 } 4178 4179 mvpp2_ingress_disable(port); 4180 4181 /* Port default configuration */ 4182 mvpp2_defaults_set(port); 4183 4184 /* Port's classifier configuration */ 4185 mvpp2_cls_oversize_rxq_set(port); 4186 mvpp2_cls_port_config(port); 4187 4188 if (mvpp22_rss_is_supported()) 4189 mvpp22_rss_port_init(port); 4190 4191 /* Provide an initial Rx packet size */ 4192 port->pkt_size = MVPP2_RX_PKT_SIZE(port->dev->mtu); 4193 4194 /* Initialize pools for swf */ 4195 err = mvpp2_swf_bm_pool_init(port); 4196 if (err) 4197 goto err_free_percpu; 4198 4199 return 0; 4200 4201 err_free_percpu: 4202 for (queue = 0; queue < port->ntxqs; queue++) { 4203 if (!port->txqs[queue]) 4204 continue; 4205 free_percpu(port->txqs[queue]->pcpu); 4206 } 4207 return err; 4208 } 4209 4210 /* Checks if the port DT description has the TX interrupts 4211 * described. On PPv2.1, there are no such interrupts. On PPv2.2, 4212 * there are available, but we need to keep support for old DTs. 4213 */ 4214 static bool mvpp2_port_has_tx_irqs(struct mvpp2 *priv, 4215 struct device_node *port_node) 4216 { 4217 char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1", 4218 "tx-cpu2", "tx-cpu3" }; 4219 int ret, i; 4220 4221 if (priv->hw_version == MVPP21) 4222 return false; 4223 4224 for (i = 0; i < 5; i++) { 4225 ret = of_property_match_string(port_node, "interrupt-names", 4226 irqs[i]); 4227 if (ret < 0) 4228 return false; 4229 } 4230 4231 return true; 4232 } 4233 4234 static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv, 4235 struct fwnode_handle *fwnode, 4236 char **mac_from) 4237 { 4238 struct mvpp2_port *port = netdev_priv(dev); 4239 char hw_mac_addr[ETH_ALEN] = {0}; 4240 char fw_mac_addr[ETH_ALEN]; 4241 4242 if (fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) { 4243 *mac_from = "firmware node"; 4244 ether_addr_copy(dev->dev_addr, fw_mac_addr); 4245 return; 4246 } 4247 4248 if (priv->hw_version == MVPP21) { 4249 mvpp21_get_mac_address(port, hw_mac_addr); 4250 if (is_valid_ether_addr(hw_mac_addr)) { 4251 *mac_from = "hardware"; 4252 ether_addr_copy(dev->dev_addr, hw_mac_addr); 4253 return; 4254 } 4255 } 4256 4257 *mac_from = "random"; 4258 eth_hw_addr_random(dev); 4259 } 4260 4261 static void mvpp2_phylink_validate(struct net_device *dev, 4262 unsigned long *supported, 4263 struct phylink_link_state *state) 4264 { 4265 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 4266 4267 phylink_set(mask, Autoneg); 4268 phylink_set_port_modes(mask); 4269 phylink_set(mask, Pause); 4270 phylink_set(mask, Asym_Pause); 4271 4272 switch (state->interface) { 4273 case PHY_INTERFACE_MODE_10GKR: 4274 phylink_set(mask, 10000baseCR_Full); 4275 phylink_set(mask, 10000baseSR_Full); 4276 phylink_set(mask, 10000baseLR_Full); 4277 phylink_set(mask, 10000baseLRM_Full); 4278 phylink_set(mask, 10000baseER_Full); 4279 phylink_set(mask, 10000baseKR_Full); 4280 /* Fall-through */ 4281 default: 4282 phylink_set(mask, 10baseT_Half); 4283 phylink_set(mask, 10baseT_Full); 4284 phylink_set(mask, 100baseT_Half); 4285 phylink_set(mask, 100baseT_Full); 4286 phylink_set(mask, 10000baseT_Full); 4287 /* Fall-through */ 4288 case PHY_INTERFACE_MODE_1000BASEX: 4289 case PHY_INTERFACE_MODE_2500BASEX: 4290 phylink_set(mask, 1000baseT_Full); 4291 phylink_set(mask, 1000baseX_Full); 4292 phylink_set(mask, 2500baseX_Full); 4293 } 4294 4295 bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS); 4296 bitmap_and(state->advertising, state->advertising, mask, 4297 __ETHTOOL_LINK_MODE_MASK_NBITS); 4298 } 4299 4300 static void mvpp22_xlg_link_state(struct mvpp2_port *port, 4301 struct phylink_link_state *state) 4302 { 4303 u32 val; 4304 4305 state->speed = SPEED_10000; 4306 state->duplex = 1; 4307 state->an_complete = 1; 4308 4309 val = readl(port->base + MVPP22_XLG_STATUS); 4310 state->link = !!(val & MVPP22_XLG_STATUS_LINK_UP); 4311 4312 state->pause = 0; 4313 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 4314 if (val & MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN) 4315 state->pause |= MLO_PAUSE_TX; 4316 if (val & MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN) 4317 state->pause |= MLO_PAUSE_RX; 4318 } 4319 4320 static void mvpp2_gmac_link_state(struct mvpp2_port *port, 4321 struct phylink_link_state *state) 4322 { 4323 u32 val; 4324 4325 val = readl(port->base + MVPP2_GMAC_STATUS0); 4326 4327 state->an_complete = !!(val & MVPP2_GMAC_STATUS0_AN_COMPLETE); 4328 state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP); 4329 state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX); 4330 4331 switch (port->phy_interface) { 4332 case PHY_INTERFACE_MODE_1000BASEX: 4333 state->speed = SPEED_1000; 4334 break; 4335 case PHY_INTERFACE_MODE_2500BASEX: 4336 state->speed = SPEED_2500; 4337 break; 4338 default: 4339 if (val & MVPP2_GMAC_STATUS0_GMII_SPEED) 4340 state->speed = SPEED_1000; 4341 else if (val & MVPP2_GMAC_STATUS0_MII_SPEED) 4342 state->speed = SPEED_100; 4343 else 4344 state->speed = SPEED_10; 4345 } 4346 4347 state->pause = 0; 4348 if (val & MVPP2_GMAC_STATUS0_RX_PAUSE) 4349 state->pause |= MLO_PAUSE_RX; 4350 if (val & MVPP2_GMAC_STATUS0_TX_PAUSE) 4351 state->pause |= MLO_PAUSE_TX; 4352 } 4353 4354 static int mvpp2_phylink_mac_link_state(struct net_device *dev, 4355 struct phylink_link_state *state) 4356 { 4357 struct mvpp2_port *port = netdev_priv(dev); 4358 4359 if (port->priv->hw_version == MVPP22 && port->gop_id == 0) { 4360 u32 mode = readl(port->base + MVPP22_XLG_CTRL3_REG); 4361 mode &= MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 4362 4363 if (mode == MVPP22_XLG_CTRL3_MACMODESELECT_10G) { 4364 mvpp22_xlg_link_state(port, state); 4365 return 1; 4366 } 4367 } 4368 4369 mvpp2_gmac_link_state(port, state); 4370 return 1; 4371 } 4372 4373 static void mvpp2_mac_an_restart(struct net_device *dev) 4374 { 4375 struct mvpp2_port *port = netdev_priv(dev); 4376 u32 val; 4377 4378 if (port->phy_interface != PHY_INTERFACE_MODE_SGMII) 4379 return; 4380 4381 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4382 /* The RESTART_AN bit is cleared by the h/w after restarting the AN 4383 * process. 4384 */ 4385 val |= MVPP2_GMAC_IN_BAND_RESTART_AN | MVPP2_GMAC_IN_BAND_AUTONEG; 4386 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4387 } 4388 4389 static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, 4390 const struct phylink_link_state *state) 4391 { 4392 u32 ctrl0, ctrl4; 4393 4394 ctrl0 = readl(port->base + MVPP22_XLG_CTRL0_REG); 4395 ctrl4 = readl(port->base + MVPP22_XLG_CTRL4_REG); 4396 4397 if (state->pause & MLO_PAUSE_TX) 4398 ctrl0 |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN; 4399 if (state->pause & MLO_PAUSE_RX) 4400 ctrl0 |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN; 4401 4402 ctrl4 &= ~MVPP22_XLG_CTRL4_MACMODSELECT_GMAC; 4403 ctrl4 |= MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC | 4404 MVPP22_XLG_CTRL4_EN_IDLE_CHECK; 4405 4406 writel(ctrl0, port->base + MVPP22_XLG_CTRL0_REG); 4407 writel(ctrl4, port->base + MVPP22_XLG_CTRL4_REG); 4408 } 4409 4410 static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode, 4411 const struct phylink_link_state *state) 4412 { 4413 u32 an, ctrl0, ctrl2, ctrl4; 4414 4415 an = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4416 ctrl0 = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 4417 ctrl2 = readl(port->base + MVPP2_GMAC_CTRL_2_REG); 4418 ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG); 4419 4420 /* Force link down */ 4421 an &= ~MVPP2_GMAC_FORCE_LINK_PASS; 4422 an |= MVPP2_GMAC_FORCE_LINK_DOWN; 4423 writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4424 4425 /* Set the GMAC in a reset state */ 4426 ctrl2 |= MVPP2_GMAC_PORT_RESET_MASK; 4427 writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 4428 4429 an &= ~(MVPP2_GMAC_CONFIG_MII_SPEED | MVPP2_GMAC_CONFIG_GMII_SPEED | 4430 MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FC_ADV_EN | 4431 MVPP2_GMAC_FC_ADV_ASM_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG | 4432 MVPP2_GMAC_CONFIG_FULL_DUPLEX | MVPP2_GMAC_AN_DUPLEX_EN | 4433 MVPP2_GMAC_FORCE_LINK_DOWN); 4434 ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK; 4435 ctrl2 &= ~(MVPP2_GMAC_PORT_RESET_MASK | MVPP2_GMAC_PCS_ENABLE_MASK); 4436 4437 if (state->interface == PHY_INTERFACE_MODE_1000BASEX || 4438 state->interface == PHY_INTERFACE_MODE_2500BASEX) { 4439 /* 1000BaseX and 2500BaseX ports cannot negotiate speed nor can 4440 * they negotiate duplex: they are always operating with a fixed 4441 * speed of 1000/2500Mbps in full duplex, so force 1000/2500 4442 * speed and full duplex here. 4443 */ 4444 ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK; 4445 an |= MVPP2_GMAC_CONFIG_GMII_SPEED | 4446 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 4447 } else if (!phy_interface_mode_is_rgmii(state->interface)) { 4448 an |= MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG; 4449 } 4450 4451 if (state->duplex) 4452 an |= MVPP2_GMAC_CONFIG_FULL_DUPLEX; 4453 if (phylink_test(state->advertising, Pause)) 4454 an |= MVPP2_GMAC_FC_ADV_EN; 4455 if (phylink_test(state->advertising, Asym_Pause)) 4456 an |= MVPP2_GMAC_FC_ADV_ASM_EN; 4457 4458 if (state->interface == PHY_INTERFACE_MODE_SGMII || 4459 state->interface == PHY_INTERFACE_MODE_1000BASEX || 4460 state->interface == PHY_INTERFACE_MODE_2500BASEX) { 4461 an |= MVPP2_GMAC_IN_BAND_AUTONEG; 4462 ctrl2 |= MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK; 4463 4464 ctrl4 &= ~(MVPP22_CTRL4_EXT_PIN_GMII_SEL | 4465 MVPP22_CTRL4_RX_FC_EN | MVPP22_CTRL4_TX_FC_EN); 4466 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 4467 MVPP22_CTRL4_DP_CLK_SEL | 4468 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 4469 4470 if (state->pause & MLO_PAUSE_TX) 4471 ctrl4 |= MVPP22_CTRL4_TX_FC_EN; 4472 if (state->pause & MLO_PAUSE_RX) 4473 ctrl4 |= MVPP22_CTRL4_RX_FC_EN; 4474 } else if (phy_interface_mode_is_rgmii(state->interface)) { 4475 an |= MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS; 4476 4477 if (state->speed == SPEED_1000) 4478 an |= MVPP2_GMAC_CONFIG_GMII_SPEED; 4479 else if (state->speed == SPEED_100) 4480 an |= MVPP2_GMAC_CONFIG_MII_SPEED; 4481 4482 ctrl4 &= ~MVPP22_CTRL4_DP_CLK_SEL; 4483 ctrl4 |= MVPP22_CTRL4_EXT_PIN_GMII_SEL | 4484 MVPP22_CTRL4_SYNC_BYPASS_DIS | 4485 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 4486 } 4487 4488 writel(ctrl0, port->base + MVPP2_GMAC_CTRL_0_REG); 4489 writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 4490 writel(ctrl4, port->base + MVPP22_GMAC_CTRL_4_REG); 4491 writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4492 } 4493 4494 static void mvpp2_mac_config(struct net_device *dev, unsigned int mode, 4495 const struct phylink_link_state *state) 4496 { 4497 struct mvpp2_port *port = netdev_priv(dev); 4498 4499 /* Check for invalid configuration */ 4500 if (state->interface == PHY_INTERFACE_MODE_10GKR && port->gop_id != 0) { 4501 netdev_err(dev, "Invalid mode on %s\n", dev->name); 4502 return; 4503 } 4504 4505 /* Make sure the port is disabled when reconfiguring the mode */ 4506 mvpp2_port_disable(port); 4507 4508 if (port->priv->hw_version == MVPP22 && 4509 port->phy_interface != state->interface) { 4510 port->phy_interface = state->interface; 4511 4512 /* Reconfigure the serdes lanes */ 4513 phy_power_off(port->comphy); 4514 mvpp22_mode_reconfigure(port); 4515 } 4516 4517 /* mac (re)configuration */ 4518 if (state->interface == PHY_INTERFACE_MODE_10GKR) 4519 mvpp2_xlg_config(port, mode, state); 4520 else if (phy_interface_mode_is_rgmii(state->interface) || 4521 state->interface == PHY_INTERFACE_MODE_SGMII || 4522 state->interface == PHY_INTERFACE_MODE_1000BASEX || 4523 state->interface == PHY_INTERFACE_MODE_2500BASEX) 4524 mvpp2_gmac_config(port, mode, state); 4525 4526 if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK) 4527 mvpp2_port_loopback_set(port, state); 4528 4529 mvpp2_port_enable(port); 4530 } 4531 4532 static void mvpp2_mac_link_up(struct net_device *dev, unsigned int mode, 4533 phy_interface_t interface, struct phy_device *phy) 4534 { 4535 struct mvpp2_port *port = netdev_priv(dev); 4536 u32 val; 4537 4538 if (!phylink_autoneg_inband(mode) && 4539 interface != PHY_INTERFACE_MODE_10GKR) { 4540 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4541 val &= ~MVPP2_GMAC_FORCE_LINK_DOWN; 4542 if (phy_interface_mode_is_rgmii(interface)) 4543 val |= MVPP2_GMAC_FORCE_LINK_PASS; 4544 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4545 } 4546 4547 mvpp2_port_enable(port); 4548 4549 mvpp2_egress_enable(port); 4550 mvpp2_ingress_enable(port); 4551 netif_tx_wake_all_queues(dev); 4552 } 4553 4554 static void mvpp2_mac_link_down(struct net_device *dev, unsigned int mode, 4555 phy_interface_t interface) 4556 { 4557 struct mvpp2_port *port = netdev_priv(dev); 4558 u32 val; 4559 4560 if (!phylink_autoneg_inband(mode) && 4561 interface != PHY_INTERFACE_MODE_10GKR) { 4562 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4563 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 4564 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 4565 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 4566 } 4567 4568 netif_tx_stop_all_queues(dev); 4569 mvpp2_egress_disable(port); 4570 mvpp2_ingress_disable(port); 4571 4572 /* When using link interrupts to notify phylink of a MAC state change, 4573 * we do not want the port to be disabled (we want to receive further 4574 * interrupts, to be notified when the port will have a link later). 4575 */ 4576 if (!port->has_phy) 4577 return; 4578 4579 mvpp2_port_disable(port); 4580 } 4581 4582 static const struct phylink_mac_ops mvpp2_phylink_ops = { 4583 .validate = mvpp2_phylink_validate, 4584 .mac_link_state = mvpp2_phylink_mac_link_state, 4585 .mac_an_restart = mvpp2_mac_an_restart, 4586 .mac_config = mvpp2_mac_config, 4587 .mac_link_up = mvpp2_mac_link_up, 4588 .mac_link_down = mvpp2_mac_link_down, 4589 }; 4590 4591 /* Ports initialization */ 4592 static int mvpp2_port_probe(struct platform_device *pdev, 4593 struct fwnode_handle *port_fwnode, 4594 struct mvpp2 *priv) 4595 { 4596 struct phy *comphy = NULL; 4597 struct mvpp2_port *port; 4598 struct mvpp2_port_pcpu *port_pcpu; 4599 struct device_node *port_node = to_of_node(port_fwnode); 4600 struct net_device *dev; 4601 struct resource *res; 4602 struct phylink *phylink; 4603 char *mac_from = ""; 4604 unsigned int ntxqs, nrxqs; 4605 bool has_tx_irqs; 4606 u32 id; 4607 int features; 4608 int phy_mode; 4609 int err, i, cpu; 4610 4611 if (port_node) { 4612 has_tx_irqs = mvpp2_port_has_tx_irqs(priv, port_node); 4613 } else { 4614 has_tx_irqs = true; 4615 queue_mode = MVPP2_QDIST_MULTI_MODE; 4616 } 4617 4618 if (!has_tx_irqs) 4619 queue_mode = MVPP2_QDIST_SINGLE_MODE; 4620 4621 ntxqs = MVPP2_MAX_TXQ; 4622 if (priv->hw_version == MVPP22 && queue_mode == MVPP2_QDIST_MULTI_MODE) 4623 nrxqs = MVPP2_DEFAULT_RXQ * num_possible_cpus(); 4624 else 4625 nrxqs = MVPP2_DEFAULT_RXQ; 4626 4627 dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs); 4628 if (!dev) 4629 return -ENOMEM; 4630 4631 phy_mode = fwnode_get_phy_mode(port_fwnode); 4632 if (phy_mode < 0) { 4633 dev_err(&pdev->dev, "incorrect phy mode\n"); 4634 err = phy_mode; 4635 goto err_free_netdev; 4636 } 4637 4638 if (port_node) { 4639 comphy = devm_of_phy_get(&pdev->dev, port_node, NULL); 4640 if (IS_ERR(comphy)) { 4641 if (PTR_ERR(comphy) == -EPROBE_DEFER) { 4642 err = -EPROBE_DEFER; 4643 goto err_free_netdev; 4644 } 4645 comphy = NULL; 4646 } 4647 } 4648 4649 if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) { 4650 err = -EINVAL; 4651 dev_err(&pdev->dev, "missing port-id value\n"); 4652 goto err_free_netdev; 4653 } 4654 4655 dev->tx_queue_len = MVPP2_MAX_TXD_MAX; 4656 dev->watchdog_timeo = 5 * HZ; 4657 dev->netdev_ops = &mvpp2_netdev_ops; 4658 dev->ethtool_ops = &mvpp2_eth_tool_ops; 4659 4660 port = netdev_priv(dev); 4661 port->dev = dev; 4662 port->fwnode = port_fwnode; 4663 port->has_phy = !!of_find_property(port_node, "phy", NULL); 4664 port->ntxqs = ntxqs; 4665 port->nrxqs = nrxqs; 4666 port->priv = priv; 4667 port->has_tx_irqs = has_tx_irqs; 4668 4669 err = mvpp2_queue_vectors_init(port, port_node); 4670 if (err) 4671 goto err_free_netdev; 4672 4673 if (port_node) 4674 port->link_irq = of_irq_get_byname(port_node, "link"); 4675 else 4676 port->link_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1); 4677 if (port->link_irq == -EPROBE_DEFER) { 4678 err = -EPROBE_DEFER; 4679 goto err_deinit_qvecs; 4680 } 4681 if (port->link_irq <= 0) 4682 /* the link irq is optional */ 4683 port->link_irq = 0; 4684 4685 if (fwnode_property_read_bool(port_fwnode, "marvell,loopback")) 4686 port->flags |= MVPP2_F_LOOPBACK; 4687 4688 port->id = id; 4689 if (priv->hw_version == MVPP21) 4690 port->first_rxq = port->id * port->nrxqs; 4691 else 4692 port->first_rxq = port->id * priv->max_port_rxqs; 4693 4694 port->of_node = port_node; 4695 port->phy_interface = phy_mode; 4696 port->comphy = comphy; 4697 4698 if (priv->hw_version == MVPP21) { 4699 res = platform_get_resource(pdev, IORESOURCE_MEM, 2 + id); 4700 port->base = devm_ioremap_resource(&pdev->dev, res); 4701 if (IS_ERR(port->base)) { 4702 err = PTR_ERR(port->base); 4703 goto err_free_irq; 4704 } 4705 4706 port->stats_base = port->priv->lms_base + 4707 MVPP21_MIB_COUNTERS_OFFSET + 4708 port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ; 4709 } else { 4710 if (fwnode_property_read_u32(port_fwnode, "gop-port-id", 4711 &port->gop_id)) { 4712 err = -EINVAL; 4713 dev_err(&pdev->dev, "missing gop-port-id value\n"); 4714 goto err_deinit_qvecs; 4715 } 4716 4717 port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id); 4718 port->stats_base = port->priv->iface_base + 4719 MVPP22_MIB_COUNTERS_OFFSET + 4720 port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ; 4721 } 4722 4723 /* Alloc per-cpu and ethtool stats */ 4724 port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats); 4725 if (!port->stats) { 4726 err = -ENOMEM; 4727 goto err_free_irq; 4728 } 4729 4730 port->ethtool_stats = devm_kcalloc(&pdev->dev, 4731 ARRAY_SIZE(mvpp2_ethtool_regs), 4732 sizeof(u64), GFP_KERNEL); 4733 if (!port->ethtool_stats) { 4734 err = -ENOMEM; 4735 goto err_free_stats; 4736 } 4737 4738 mutex_init(&port->gather_stats_lock); 4739 INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics); 4740 4741 mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from); 4742 4743 port->tx_ring_size = MVPP2_MAX_TXD_DFLT; 4744 port->rx_ring_size = MVPP2_MAX_RXD_DFLT; 4745 SET_NETDEV_DEV(dev, &pdev->dev); 4746 4747 err = mvpp2_port_init(port); 4748 if (err < 0) { 4749 dev_err(&pdev->dev, "failed to init port %d\n", id); 4750 goto err_free_stats; 4751 } 4752 4753 mvpp2_port_periodic_xon_disable(port); 4754 4755 mvpp2_port_reset(port); 4756 4757 port->pcpu = alloc_percpu(struct mvpp2_port_pcpu); 4758 if (!port->pcpu) { 4759 err = -ENOMEM; 4760 goto err_free_txq_pcpu; 4761 } 4762 4763 if (!port->has_tx_irqs) { 4764 for_each_present_cpu(cpu) { 4765 port_pcpu = per_cpu_ptr(port->pcpu, cpu); 4766 4767 hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC, 4768 HRTIMER_MODE_REL_PINNED); 4769 port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb; 4770 port_pcpu->timer_scheduled = false; 4771 4772 tasklet_init(&port_pcpu->tx_done_tasklet, 4773 mvpp2_tx_proc_cb, 4774 (unsigned long)dev); 4775 } 4776 } 4777 4778 features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 4779 NETIF_F_TSO; 4780 dev->features = features | NETIF_F_RXCSUM; 4781 dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO | 4782 NETIF_F_HW_VLAN_CTAG_FILTER; 4783 4784 if (mvpp22_rss_is_supported()) 4785 dev->hw_features |= NETIF_F_RXHASH; 4786 4787 if (port->pool_long->id == MVPP2_BM_JUMBO && port->id != 0) { 4788 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); 4789 dev->hw_features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); 4790 } 4791 4792 dev->vlan_features |= features; 4793 dev->gso_max_segs = MVPP2_MAX_TSO_SEGS; 4794 dev->priv_flags |= IFF_UNICAST_FLT; 4795 4796 /* MTU range: 68 - 9704 */ 4797 dev->min_mtu = ETH_MIN_MTU; 4798 /* 9704 == 9728 - 20 and rounding to 8 */ 4799 dev->max_mtu = MVPP2_BM_JUMBO_PKT_SIZE; 4800 dev->dev.of_node = port_node; 4801 4802 /* Phylink isn't used w/ ACPI as of now */ 4803 if (port_node) { 4804 phylink = phylink_create(dev, port_fwnode, phy_mode, 4805 &mvpp2_phylink_ops); 4806 if (IS_ERR(phylink)) { 4807 err = PTR_ERR(phylink); 4808 goto err_free_port_pcpu; 4809 } 4810 port->phylink = phylink; 4811 } else { 4812 port->phylink = NULL; 4813 } 4814 4815 err = register_netdev(dev); 4816 if (err < 0) { 4817 dev_err(&pdev->dev, "failed to register netdev\n"); 4818 goto err_phylink; 4819 } 4820 netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr); 4821 4822 priv->port_list[priv->port_count++] = port; 4823 4824 return 0; 4825 4826 err_phylink: 4827 if (port->phylink) 4828 phylink_destroy(port->phylink); 4829 err_free_port_pcpu: 4830 free_percpu(port->pcpu); 4831 err_free_txq_pcpu: 4832 for (i = 0; i < port->ntxqs; i++) 4833 free_percpu(port->txqs[i]->pcpu); 4834 err_free_stats: 4835 free_percpu(port->stats); 4836 err_free_irq: 4837 if (port->link_irq) 4838 irq_dispose_mapping(port->link_irq); 4839 err_deinit_qvecs: 4840 mvpp2_queue_vectors_deinit(port); 4841 err_free_netdev: 4842 free_netdev(dev); 4843 return err; 4844 } 4845 4846 /* Ports removal routine */ 4847 static void mvpp2_port_remove(struct mvpp2_port *port) 4848 { 4849 int i; 4850 4851 unregister_netdev(port->dev); 4852 if (port->phylink) 4853 phylink_destroy(port->phylink); 4854 free_percpu(port->pcpu); 4855 free_percpu(port->stats); 4856 for (i = 0; i < port->ntxqs; i++) 4857 free_percpu(port->txqs[i]->pcpu); 4858 mvpp2_queue_vectors_deinit(port); 4859 if (port->link_irq) 4860 irq_dispose_mapping(port->link_irq); 4861 free_netdev(port->dev); 4862 } 4863 4864 /* Initialize decoding windows */ 4865 static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram, 4866 struct mvpp2 *priv) 4867 { 4868 u32 win_enable; 4869 int i; 4870 4871 for (i = 0; i < 6; i++) { 4872 mvpp2_write(priv, MVPP2_WIN_BASE(i), 0); 4873 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0); 4874 4875 if (i < 4) 4876 mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0); 4877 } 4878 4879 win_enable = 0; 4880 4881 for (i = 0; i < dram->num_cs; i++) { 4882 const struct mbus_dram_window *cs = dram->cs + i; 4883 4884 mvpp2_write(priv, MVPP2_WIN_BASE(i), 4885 (cs->base & 0xffff0000) | (cs->mbus_attr << 8) | 4886 dram->mbus_dram_target_id); 4887 4888 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 4889 (cs->size - 1) & 0xffff0000); 4890 4891 win_enable |= (1 << i); 4892 } 4893 4894 mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable); 4895 } 4896 4897 /* Initialize Rx FIFO's */ 4898 static void mvpp2_rx_fifo_init(struct mvpp2 *priv) 4899 { 4900 int port; 4901 4902 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 4903 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 4904 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 4905 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 4906 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 4907 } 4908 4909 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 4910 MVPP2_RX_FIFO_PORT_MIN_PKT); 4911 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 4912 } 4913 4914 static void mvpp22_rx_fifo_init(struct mvpp2 *priv) 4915 { 4916 int port; 4917 4918 /* The FIFO size parameters are set depending on the maximum speed a 4919 * given port can handle: 4920 * - Port 0: 10Gbps 4921 * - Port 1: 2.5Gbps 4922 * - Ports 2 and 3: 1Gbps 4923 */ 4924 4925 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(0), 4926 MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB); 4927 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(0), 4928 MVPP2_RX_FIFO_PORT_ATTR_SIZE_32KB); 4929 4930 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(1), 4931 MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB); 4932 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(1), 4933 MVPP2_RX_FIFO_PORT_ATTR_SIZE_8KB); 4934 4935 for (port = 2; port < MVPP2_MAX_PORTS; port++) { 4936 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 4937 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 4938 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 4939 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 4940 } 4941 4942 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 4943 MVPP2_RX_FIFO_PORT_MIN_PKT); 4944 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 4945 } 4946 4947 /* Initialize Tx FIFO's: the total FIFO size is 19kB on PPv2.2 and 10G 4948 * interfaces must have a Tx FIFO size of 10kB. As only port 0 can do 10G, 4949 * configure its Tx FIFO size to 10kB and the others ports Tx FIFO size to 3kB. 4950 */ 4951 static void mvpp22_tx_fifo_init(struct mvpp2 *priv) 4952 { 4953 int port, size, thrs; 4954 4955 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 4956 if (port == 0) { 4957 size = MVPP22_TX_FIFO_DATA_SIZE_10KB; 4958 thrs = MVPP2_TX_FIFO_THRESHOLD_10KB; 4959 } else { 4960 size = MVPP22_TX_FIFO_DATA_SIZE_3KB; 4961 thrs = MVPP2_TX_FIFO_THRESHOLD_3KB; 4962 } 4963 mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port), size); 4964 mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), thrs); 4965 } 4966 } 4967 4968 static void mvpp2_axi_init(struct mvpp2 *priv) 4969 { 4970 u32 val, rdval, wrval; 4971 4972 mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0); 4973 4974 /* AXI Bridge Configuration */ 4975 4976 rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE 4977 << MVPP22_AXI_ATTR_CACHE_OFFS; 4978 rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 4979 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 4980 4981 wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE 4982 << MVPP22_AXI_ATTR_CACHE_OFFS; 4983 wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 4984 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 4985 4986 /* BM */ 4987 mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval); 4988 mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval); 4989 4990 /* Descriptors */ 4991 mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval); 4992 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval); 4993 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval); 4994 mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval); 4995 4996 /* Buffer Data */ 4997 mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval); 4998 mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval); 4999 5000 val = MVPP22_AXI_CODE_CACHE_NON_CACHE 5001 << MVPP22_AXI_CODE_CACHE_OFFS; 5002 val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM 5003 << MVPP22_AXI_CODE_DOMAIN_OFFS; 5004 mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val); 5005 mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val); 5006 5007 val = MVPP22_AXI_CODE_CACHE_RD_CACHE 5008 << MVPP22_AXI_CODE_CACHE_OFFS; 5009 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 5010 << MVPP22_AXI_CODE_DOMAIN_OFFS; 5011 5012 mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val); 5013 5014 val = MVPP22_AXI_CODE_CACHE_WR_CACHE 5015 << MVPP22_AXI_CODE_CACHE_OFFS; 5016 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 5017 << MVPP22_AXI_CODE_DOMAIN_OFFS; 5018 5019 mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val); 5020 } 5021 5022 /* Initialize network controller common part HW */ 5023 static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv) 5024 { 5025 const struct mbus_dram_target_info *dram_target_info; 5026 int err, i; 5027 u32 val; 5028 5029 /* MBUS windows configuration */ 5030 dram_target_info = mv_mbus_dram_info(); 5031 if (dram_target_info) 5032 mvpp2_conf_mbus_windows(dram_target_info, priv); 5033 5034 if (priv->hw_version == MVPP22) 5035 mvpp2_axi_init(priv); 5036 5037 /* Disable HW PHY polling */ 5038 if (priv->hw_version == MVPP21) { 5039 val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 5040 val |= MVPP2_PHY_AN_STOP_SMI0_MASK; 5041 writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 5042 } else { 5043 val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 5044 val &= ~MVPP22_SMI_POLLING_EN; 5045 writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 5046 } 5047 5048 /* Allocate and initialize aggregated TXQs */ 5049 priv->aggr_txqs = devm_kcalloc(&pdev->dev, num_present_cpus(), 5050 sizeof(*priv->aggr_txqs), 5051 GFP_KERNEL); 5052 if (!priv->aggr_txqs) 5053 return -ENOMEM; 5054 5055 for_each_present_cpu(i) { 5056 priv->aggr_txqs[i].id = i; 5057 priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE; 5058 err = mvpp2_aggr_txq_init(pdev, &priv->aggr_txqs[i], i, priv); 5059 if (err < 0) 5060 return err; 5061 } 5062 5063 /* Fifo Init */ 5064 if (priv->hw_version == MVPP21) { 5065 mvpp2_rx_fifo_init(priv); 5066 } else { 5067 mvpp22_rx_fifo_init(priv); 5068 mvpp22_tx_fifo_init(priv); 5069 } 5070 5071 if (priv->hw_version == MVPP21) 5072 writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT, 5073 priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG); 5074 5075 /* Allow cache snoop when transmiting packets */ 5076 mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1); 5077 5078 /* Buffer Manager initialization */ 5079 err = mvpp2_bm_init(pdev, priv); 5080 if (err < 0) 5081 return err; 5082 5083 /* Parser default initialization */ 5084 err = mvpp2_prs_default_init(pdev, priv); 5085 if (err < 0) 5086 return err; 5087 5088 /* Classifier default initialization */ 5089 mvpp2_cls_init(priv); 5090 5091 return 0; 5092 } 5093 5094 static int mvpp2_probe(struct platform_device *pdev) 5095 { 5096 const struct acpi_device_id *acpi_id; 5097 struct fwnode_handle *fwnode = pdev->dev.fwnode; 5098 struct fwnode_handle *port_fwnode; 5099 struct mvpp2 *priv; 5100 struct resource *res; 5101 void __iomem *base; 5102 int i; 5103 int err; 5104 5105 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 5106 if (!priv) 5107 return -ENOMEM; 5108 5109 if (has_acpi_companion(&pdev->dev)) { 5110 acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table, 5111 &pdev->dev); 5112 priv->hw_version = (unsigned long)acpi_id->driver_data; 5113 } else { 5114 priv->hw_version = 5115 (unsigned long)of_device_get_match_data(&pdev->dev); 5116 } 5117 5118 /* multi queue mode isn't supported on PPV2.1, fallback to single 5119 * mode 5120 */ 5121 if (priv->hw_version == MVPP21) 5122 queue_mode = MVPP2_QDIST_SINGLE_MODE; 5123 5124 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 5125 base = devm_ioremap_resource(&pdev->dev, res); 5126 if (IS_ERR(base)) 5127 return PTR_ERR(base); 5128 5129 if (priv->hw_version == MVPP21) { 5130 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 5131 priv->lms_base = devm_ioremap_resource(&pdev->dev, res); 5132 if (IS_ERR(priv->lms_base)) 5133 return PTR_ERR(priv->lms_base); 5134 } else { 5135 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 5136 if (has_acpi_companion(&pdev->dev)) { 5137 /* In case the MDIO memory region is declared in 5138 * the ACPI, it can already appear as 'in-use' 5139 * in the OS. Because it is overlapped by second 5140 * region of the network controller, make 5141 * sure it is released, before requesting it again. 5142 * The care is taken by mvpp2 driver to avoid 5143 * concurrent access to this memory region. 5144 */ 5145 release_resource(res); 5146 } 5147 priv->iface_base = devm_ioremap_resource(&pdev->dev, res); 5148 if (IS_ERR(priv->iface_base)) 5149 return PTR_ERR(priv->iface_base); 5150 } 5151 5152 if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) { 5153 priv->sysctrl_base = 5154 syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 5155 "marvell,system-controller"); 5156 if (IS_ERR(priv->sysctrl_base)) 5157 /* The system controller regmap is optional for dt 5158 * compatibility reasons. When not provided, the 5159 * configuration of the GoP relies on the 5160 * firmware/bootloader. 5161 */ 5162 priv->sysctrl_base = NULL; 5163 } 5164 5165 mvpp2_setup_bm_pool(); 5166 5167 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 5168 u32 addr_space_sz; 5169 5170 addr_space_sz = (priv->hw_version == MVPP21 ? 5171 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ); 5172 priv->swth_base[i] = base + i * addr_space_sz; 5173 } 5174 5175 if (priv->hw_version == MVPP21) 5176 priv->max_port_rxqs = 8; 5177 else 5178 priv->max_port_rxqs = 32; 5179 5180 if (dev_of_node(&pdev->dev)) { 5181 priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk"); 5182 if (IS_ERR(priv->pp_clk)) 5183 return PTR_ERR(priv->pp_clk); 5184 err = clk_prepare_enable(priv->pp_clk); 5185 if (err < 0) 5186 return err; 5187 5188 priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk"); 5189 if (IS_ERR(priv->gop_clk)) { 5190 err = PTR_ERR(priv->gop_clk); 5191 goto err_pp_clk; 5192 } 5193 err = clk_prepare_enable(priv->gop_clk); 5194 if (err < 0) 5195 goto err_pp_clk; 5196 5197 if (priv->hw_version == MVPP22) { 5198 priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk"); 5199 if (IS_ERR(priv->mg_clk)) { 5200 err = PTR_ERR(priv->mg_clk); 5201 goto err_gop_clk; 5202 } 5203 5204 err = clk_prepare_enable(priv->mg_clk); 5205 if (err < 0) 5206 goto err_gop_clk; 5207 5208 priv->mg_core_clk = devm_clk_get(&pdev->dev, "mg_core_clk"); 5209 if (IS_ERR(priv->mg_core_clk)) { 5210 priv->mg_core_clk = NULL; 5211 } else { 5212 err = clk_prepare_enable(priv->mg_core_clk); 5213 if (err < 0) 5214 goto err_mg_clk; 5215 } 5216 } 5217 5218 priv->axi_clk = devm_clk_get(&pdev->dev, "axi_clk"); 5219 if (IS_ERR(priv->axi_clk)) { 5220 err = PTR_ERR(priv->axi_clk); 5221 if (err == -EPROBE_DEFER) 5222 goto err_mg_core_clk; 5223 priv->axi_clk = NULL; 5224 } else { 5225 err = clk_prepare_enable(priv->axi_clk); 5226 if (err < 0) 5227 goto err_mg_core_clk; 5228 } 5229 5230 /* Get system's tclk rate */ 5231 priv->tclk = clk_get_rate(priv->pp_clk); 5232 } else if (device_property_read_u32(&pdev->dev, "clock-frequency", 5233 &priv->tclk)) { 5234 dev_err(&pdev->dev, "missing clock-frequency value\n"); 5235 return -EINVAL; 5236 } 5237 5238 if (priv->hw_version == MVPP22) { 5239 err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK); 5240 if (err) 5241 goto err_axi_clk; 5242 /* Sadly, the BM pools all share the same register to 5243 * store the high 32 bits of their address. So they 5244 * must all have the same high 32 bits, which forces 5245 * us to restrict coherent memory to DMA_BIT_MASK(32). 5246 */ 5247 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 5248 if (err) 5249 goto err_axi_clk; 5250 } 5251 5252 /* Initialize network controller */ 5253 err = mvpp2_init(pdev, priv); 5254 if (err < 0) { 5255 dev_err(&pdev->dev, "failed to initialize controller\n"); 5256 goto err_axi_clk; 5257 } 5258 5259 /* Initialize ports */ 5260 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 5261 err = mvpp2_port_probe(pdev, port_fwnode, priv); 5262 if (err < 0) 5263 goto err_port_probe; 5264 } 5265 5266 if (priv->port_count == 0) { 5267 dev_err(&pdev->dev, "no ports enabled\n"); 5268 err = -ENODEV; 5269 goto err_axi_clk; 5270 } 5271 5272 /* Statistics must be gathered regularly because some of them (like 5273 * packets counters) are 32-bit registers and could overflow quite 5274 * quickly. For instance, a 10Gb link used at full bandwidth with the 5275 * smallest packets (64B) will overflow a 32-bit counter in less than 5276 * 30 seconds. Then, use a workqueue to fill 64-bit counters. 5277 */ 5278 snprintf(priv->queue_name, sizeof(priv->queue_name), 5279 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev), 5280 priv->port_count > 1 ? "+" : ""); 5281 priv->stats_queue = create_singlethread_workqueue(priv->queue_name); 5282 if (!priv->stats_queue) { 5283 err = -ENOMEM; 5284 goto err_port_probe; 5285 } 5286 5287 mvpp2_dbgfs_init(priv, pdev->name); 5288 5289 platform_set_drvdata(pdev, priv); 5290 return 0; 5291 5292 err_port_probe: 5293 i = 0; 5294 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 5295 if (priv->port_list[i]) 5296 mvpp2_port_remove(priv->port_list[i]); 5297 i++; 5298 } 5299 err_axi_clk: 5300 clk_disable_unprepare(priv->axi_clk); 5301 5302 err_mg_core_clk: 5303 if (priv->hw_version == MVPP22) 5304 clk_disable_unprepare(priv->mg_core_clk); 5305 err_mg_clk: 5306 if (priv->hw_version == MVPP22) 5307 clk_disable_unprepare(priv->mg_clk); 5308 err_gop_clk: 5309 clk_disable_unprepare(priv->gop_clk); 5310 err_pp_clk: 5311 clk_disable_unprepare(priv->pp_clk); 5312 return err; 5313 } 5314 5315 static int mvpp2_remove(struct platform_device *pdev) 5316 { 5317 struct mvpp2 *priv = platform_get_drvdata(pdev); 5318 struct fwnode_handle *fwnode = pdev->dev.fwnode; 5319 struct fwnode_handle *port_fwnode; 5320 int i = 0; 5321 5322 mvpp2_dbgfs_cleanup(priv); 5323 5324 flush_workqueue(priv->stats_queue); 5325 destroy_workqueue(priv->stats_queue); 5326 5327 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 5328 if (priv->port_list[i]) { 5329 mutex_destroy(&priv->port_list[i]->gather_stats_lock); 5330 mvpp2_port_remove(priv->port_list[i]); 5331 } 5332 i++; 5333 } 5334 5335 for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) { 5336 struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i]; 5337 5338 mvpp2_bm_pool_destroy(pdev, priv, bm_pool); 5339 } 5340 5341 for_each_present_cpu(i) { 5342 struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i]; 5343 5344 dma_free_coherent(&pdev->dev, 5345 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 5346 aggr_txq->descs, 5347 aggr_txq->descs_dma); 5348 } 5349 5350 if (is_acpi_node(port_fwnode)) 5351 return 0; 5352 5353 clk_disable_unprepare(priv->axi_clk); 5354 clk_disable_unprepare(priv->mg_core_clk); 5355 clk_disable_unprepare(priv->mg_clk); 5356 clk_disable_unprepare(priv->pp_clk); 5357 clk_disable_unprepare(priv->gop_clk); 5358 5359 return 0; 5360 } 5361 5362 static const struct of_device_id mvpp2_match[] = { 5363 { 5364 .compatible = "marvell,armada-375-pp2", 5365 .data = (void *)MVPP21, 5366 }, 5367 { 5368 .compatible = "marvell,armada-7k-pp22", 5369 .data = (void *)MVPP22, 5370 }, 5371 { } 5372 }; 5373 MODULE_DEVICE_TABLE(of, mvpp2_match); 5374 5375 static const struct acpi_device_id mvpp2_acpi_match[] = { 5376 { "MRVL0110", MVPP22 }, 5377 { }, 5378 }; 5379 MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match); 5380 5381 static struct platform_driver mvpp2_driver = { 5382 .probe = mvpp2_probe, 5383 .remove = mvpp2_remove, 5384 .driver = { 5385 .name = MVPP2_DRIVER_NAME, 5386 .of_match_table = mvpp2_match, 5387 .acpi_match_table = ACPI_PTR(mvpp2_acpi_match), 5388 }, 5389 }; 5390 5391 module_platform_driver(mvpp2_driver); 5392 5393 MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com"); 5394 MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>"); 5395 MODULE_LICENSE("GPL v2"); 5396