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/ptp_classify.h> 32 #include <linux/clk.h> 33 #include <linux/hrtimer.h> 34 #include <linux/ktime.h> 35 #include <linux/regmap.h> 36 #include <uapi/linux/ppp_defs.h> 37 #include <net/ip.h> 38 #include <net/ipv6.h> 39 #include <net/tso.h> 40 #include <linux/bpf_trace.h> 41 42 #include "mvpp2.h" 43 #include "mvpp2_prs.h" 44 #include "mvpp2_cls.h" 45 46 enum mvpp2_bm_pool_log_num { 47 MVPP2_BM_SHORT, 48 MVPP2_BM_LONG, 49 MVPP2_BM_JUMBO, 50 MVPP2_BM_POOLS_NUM 51 }; 52 53 static struct { 54 int pkt_size; 55 int buf_num; 56 } mvpp2_pools[MVPP2_BM_POOLS_NUM]; 57 58 /* The prototype is added here to be used in start_dev when using ACPI. This 59 * will be removed once phylink is used for all modes (dt+ACPI). 60 */ 61 static void mvpp2_acpi_start(struct mvpp2_port *port); 62 63 /* Queue modes */ 64 #define MVPP2_QDIST_SINGLE_MODE 0 65 #define MVPP2_QDIST_MULTI_MODE 1 66 67 static int queue_mode = MVPP2_QDIST_MULTI_MODE; 68 69 module_param(queue_mode, int, 0444); 70 MODULE_PARM_DESC(queue_mode, "Set queue_mode (single=0, multi=1)"); 71 72 /* Utility/helper methods */ 73 74 void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data) 75 { 76 writel(data, priv->swth_base[0] + offset); 77 } 78 79 u32 mvpp2_read(struct mvpp2 *priv, u32 offset) 80 { 81 return readl(priv->swth_base[0] + offset); 82 } 83 84 static u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset) 85 { 86 return readl_relaxed(priv->swth_base[0] + offset); 87 } 88 89 static inline u32 mvpp2_cpu_to_thread(struct mvpp2 *priv, int cpu) 90 { 91 return cpu % priv->nthreads; 92 } 93 94 static void mvpp2_cm3_write(struct mvpp2 *priv, u32 offset, u32 data) 95 { 96 writel(data, priv->cm3_base + offset); 97 } 98 99 static u32 mvpp2_cm3_read(struct mvpp2 *priv, u32 offset) 100 { 101 return readl(priv->cm3_base + offset); 102 } 103 104 static struct page_pool * 105 mvpp2_create_page_pool(struct device *dev, int num, int len, 106 enum dma_data_direction dma_dir) 107 { 108 struct page_pool_params pp_params = { 109 /* internal DMA mapping in page_pool */ 110 .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV, 111 .pool_size = num, 112 .nid = NUMA_NO_NODE, 113 .dev = dev, 114 .dma_dir = dma_dir, 115 .offset = MVPP2_SKB_HEADROOM, 116 .max_len = len, 117 }; 118 119 return page_pool_create(&pp_params); 120 } 121 122 /* These accessors should be used to access: 123 * 124 * - per-thread registers, where each thread has its own copy of the 125 * register. 126 * 127 * MVPP2_BM_VIRT_ALLOC_REG 128 * MVPP2_BM_ADDR_HIGH_ALLOC 129 * MVPP22_BM_ADDR_HIGH_RLS_REG 130 * MVPP2_BM_VIRT_RLS_REG 131 * MVPP2_ISR_RX_TX_CAUSE_REG 132 * MVPP2_ISR_RX_TX_MASK_REG 133 * MVPP2_TXQ_NUM_REG 134 * MVPP2_AGGR_TXQ_UPDATE_REG 135 * MVPP2_TXQ_RSVD_REQ_REG 136 * MVPP2_TXQ_RSVD_RSLT_REG 137 * MVPP2_TXQ_SENT_REG 138 * MVPP2_RXQ_NUM_REG 139 * 140 * - global registers that must be accessed through a specific thread 141 * window, because they are related to an access to a per-thread 142 * register 143 * 144 * MVPP2_BM_PHY_ALLOC_REG (related to MVPP2_BM_VIRT_ALLOC_REG) 145 * MVPP2_BM_PHY_RLS_REG (related to MVPP2_BM_VIRT_RLS_REG) 146 * MVPP2_RXQ_THRESH_REG (related to MVPP2_RXQ_NUM_REG) 147 * MVPP2_RXQ_DESC_ADDR_REG (related to MVPP2_RXQ_NUM_REG) 148 * MVPP2_RXQ_DESC_SIZE_REG (related to MVPP2_RXQ_NUM_REG) 149 * MVPP2_RXQ_INDEX_REG (related to MVPP2_RXQ_NUM_REG) 150 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 151 * MVPP2_TXQ_DESC_ADDR_REG (related to MVPP2_TXQ_NUM_REG) 152 * MVPP2_TXQ_DESC_SIZE_REG (related to MVPP2_TXQ_NUM_REG) 153 * MVPP2_TXQ_INDEX_REG (related to MVPP2_TXQ_NUM_REG) 154 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 155 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 156 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 157 */ 158 static void mvpp2_thread_write(struct mvpp2 *priv, unsigned int thread, 159 u32 offset, u32 data) 160 { 161 writel(data, priv->swth_base[thread] + offset); 162 } 163 164 static u32 mvpp2_thread_read(struct mvpp2 *priv, unsigned int thread, 165 u32 offset) 166 { 167 return readl(priv->swth_base[thread] + offset); 168 } 169 170 static void mvpp2_thread_write_relaxed(struct mvpp2 *priv, unsigned int thread, 171 u32 offset, u32 data) 172 { 173 writel_relaxed(data, priv->swth_base[thread] + offset); 174 } 175 176 static u32 mvpp2_thread_read_relaxed(struct mvpp2 *priv, unsigned int thread, 177 u32 offset) 178 { 179 return readl_relaxed(priv->swth_base[thread] + offset); 180 } 181 182 static dma_addr_t mvpp2_txdesc_dma_addr_get(struct mvpp2_port *port, 183 struct mvpp2_tx_desc *tx_desc) 184 { 185 if (port->priv->hw_version == MVPP21) 186 return le32_to_cpu(tx_desc->pp21.buf_dma_addr); 187 else 188 return le64_to_cpu(tx_desc->pp22.buf_dma_addr_ptp) & 189 MVPP2_DESC_DMA_MASK; 190 } 191 192 static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port, 193 struct mvpp2_tx_desc *tx_desc, 194 dma_addr_t dma_addr) 195 { 196 dma_addr_t addr, offset; 197 198 addr = dma_addr & ~MVPP2_TX_DESC_ALIGN; 199 offset = dma_addr & MVPP2_TX_DESC_ALIGN; 200 201 if (port->priv->hw_version == MVPP21) { 202 tx_desc->pp21.buf_dma_addr = cpu_to_le32(addr); 203 tx_desc->pp21.packet_offset = offset; 204 } else { 205 __le64 val = cpu_to_le64(addr); 206 207 tx_desc->pp22.buf_dma_addr_ptp &= ~cpu_to_le64(MVPP2_DESC_DMA_MASK); 208 tx_desc->pp22.buf_dma_addr_ptp |= val; 209 tx_desc->pp22.packet_offset = offset; 210 } 211 } 212 213 static size_t mvpp2_txdesc_size_get(struct mvpp2_port *port, 214 struct mvpp2_tx_desc *tx_desc) 215 { 216 if (port->priv->hw_version == MVPP21) 217 return le16_to_cpu(tx_desc->pp21.data_size); 218 else 219 return le16_to_cpu(tx_desc->pp22.data_size); 220 } 221 222 static void mvpp2_txdesc_size_set(struct mvpp2_port *port, 223 struct mvpp2_tx_desc *tx_desc, 224 size_t size) 225 { 226 if (port->priv->hw_version == MVPP21) 227 tx_desc->pp21.data_size = cpu_to_le16(size); 228 else 229 tx_desc->pp22.data_size = cpu_to_le16(size); 230 } 231 232 static void mvpp2_txdesc_txq_set(struct mvpp2_port *port, 233 struct mvpp2_tx_desc *tx_desc, 234 unsigned int txq) 235 { 236 if (port->priv->hw_version == MVPP21) 237 tx_desc->pp21.phys_txq = txq; 238 else 239 tx_desc->pp22.phys_txq = txq; 240 } 241 242 static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port, 243 struct mvpp2_tx_desc *tx_desc, 244 unsigned int command) 245 { 246 if (port->priv->hw_version == MVPP21) 247 tx_desc->pp21.command = cpu_to_le32(command); 248 else 249 tx_desc->pp22.command = cpu_to_le32(command); 250 } 251 252 static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port, 253 struct mvpp2_tx_desc *tx_desc) 254 { 255 if (port->priv->hw_version == MVPP21) 256 return tx_desc->pp21.packet_offset; 257 else 258 return tx_desc->pp22.packet_offset; 259 } 260 261 static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port, 262 struct mvpp2_rx_desc *rx_desc) 263 { 264 if (port->priv->hw_version == MVPP21) 265 return le32_to_cpu(rx_desc->pp21.buf_dma_addr); 266 else 267 return le64_to_cpu(rx_desc->pp22.buf_dma_addr_key_hash) & 268 MVPP2_DESC_DMA_MASK; 269 } 270 271 static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port, 272 struct mvpp2_rx_desc *rx_desc) 273 { 274 if (port->priv->hw_version == MVPP21) 275 return le32_to_cpu(rx_desc->pp21.buf_cookie); 276 else 277 return le64_to_cpu(rx_desc->pp22.buf_cookie_misc) & 278 MVPP2_DESC_DMA_MASK; 279 } 280 281 static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port, 282 struct mvpp2_rx_desc *rx_desc) 283 { 284 if (port->priv->hw_version == MVPP21) 285 return le16_to_cpu(rx_desc->pp21.data_size); 286 else 287 return le16_to_cpu(rx_desc->pp22.data_size); 288 } 289 290 static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port, 291 struct mvpp2_rx_desc *rx_desc) 292 { 293 if (port->priv->hw_version == MVPP21) 294 return le32_to_cpu(rx_desc->pp21.status); 295 else 296 return le32_to_cpu(rx_desc->pp22.status); 297 } 298 299 static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu) 300 { 301 txq_pcpu->txq_get_index++; 302 if (txq_pcpu->txq_get_index == txq_pcpu->size) 303 txq_pcpu->txq_get_index = 0; 304 } 305 306 static void mvpp2_txq_inc_put(struct mvpp2_port *port, 307 struct mvpp2_txq_pcpu *txq_pcpu, 308 void *data, 309 struct mvpp2_tx_desc *tx_desc, 310 enum mvpp2_tx_buf_type buf_type) 311 { 312 struct mvpp2_txq_pcpu_buf *tx_buf = 313 txq_pcpu->buffs + txq_pcpu->txq_put_index; 314 tx_buf->type = buf_type; 315 if (buf_type == MVPP2_TYPE_SKB) 316 tx_buf->skb = data; 317 else 318 tx_buf->xdpf = data; 319 tx_buf->size = mvpp2_txdesc_size_get(port, tx_desc); 320 tx_buf->dma = mvpp2_txdesc_dma_addr_get(port, tx_desc) + 321 mvpp2_txdesc_offset_get(port, tx_desc); 322 txq_pcpu->txq_put_index++; 323 if (txq_pcpu->txq_put_index == txq_pcpu->size) 324 txq_pcpu->txq_put_index = 0; 325 } 326 327 /* Get number of maximum RXQ */ 328 static int mvpp2_get_nrxqs(struct mvpp2 *priv) 329 { 330 unsigned int nrxqs; 331 332 if (priv->hw_version >= MVPP22 && queue_mode == MVPP2_QDIST_SINGLE_MODE) 333 return 1; 334 335 /* According to the PPv2.2 datasheet and our experiments on 336 * PPv2.1, RX queues have an allocation granularity of 4 (when 337 * more than a single one on PPv2.2). 338 * Round up to nearest multiple of 4. 339 */ 340 nrxqs = (num_possible_cpus() + 3) & ~0x3; 341 if (nrxqs > MVPP2_PORT_MAX_RXQ) 342 nrxqs = MVPP2_PORT_MAX_RXQ; 343 344 return nrxqs; 345 } 346 347 /* Get number of physical egress port */ 348 static inline int mvpp2_egress_port(struct mvpp2_port *port) 349 { 350 return MVPP2_MAX_TCONT + port->id; 351 } 352 353 /* Get number of physical TXQ */ 354 static inline int mvpp2_txq_phys(int port, int txq) 355 { 356 return (MVPP2_MAX_TCONT + port) * MVPP2_MAX_TXQ + txq; 357 } 358 359 /* Returns a struct page if page_pool is set, otherwise a buffer */ 360 static void *mvpp2_frag_alloc(const struct mvpp2_bm_pool *pool, 361 struct page_pool *page_pool) 362 { 363 if (page_pool) 364 return page_pool_dev_alloc_pages(page_pool); 365 366 if (likely(pool->frag_size <= PAGE_SIZE)) 367 return netdev_alloc_frag(pool->frag_size); 368 369 return kmalloc(pool->frag_size, GFP_ATOMIC); 370 } 371 372 static void mvpp2_frag_free(const struct mvpp2_bm_pool *pool, 373 struct page_pool *page_pool, void *data) 374 { 375 if (page_pool) 376 page_pool_put_full_page(page_pool, virt_to_head_page(data), false); 377 else if (likely(pool->frag_size <= PAGE_SIZE)) 378 skb_free_frag(data); 379 else 380 kfree(data); 381 } 382 383 /* Buffer Manager configuration routines */ 384 385 /* Create pool */ 386 static int mvpp2_bm_pool_create(struct device *dev, struct mvpp2 *priv, 387 struct mvpp2_bm_pool *bm_pool, int size) 388 { 389 u32 val; 390 391 /* Number of buffer pointers must be a multiple of 16, as per 392 * hardware constraints 393 */ 394 if (!IS_ALIGNED(size, 16)) 395 return -EINVAL; 396 397 /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 and PPv2.3 needs 16 398 * bytes per buffer pointer 399 */ 400 if (priv->hw_version == MVPP21) 401 bm_pool->size_bytes = 2 * sizeof(u32) * size; 402 else 403 bm_pool->size_bytes = 2 * sizeof(u64) * size; 404 405 bm_pool->virt_addr = dma_alloc_coherent(dev, bm_pool->size_bytes, 406 &bm_pool->dma_addr, 407 GFP_KERNEL); 408 if (!bm_pool->virt_addr) 409 return -ENOMEM; 410 411 if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr, 412 MVPP2_BM_POOL_PTR_ALIGN)) { 413 dma_free_coherent(dev, bm_pool->size_bytes, 414 bm_pool->virt_addr, bm_pool->dma_addr); 415 dev_err(dev, "BM pool %d is not %d bytes aligned\n", 416 bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN); 417 return -ENOMEM; 418 } 419 420 mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id), 421 lower_32_bits(bm_pool->dma_addr)); 422 mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size); 423 424 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 425 val |= MVPP2_BM_START_MASK; 426 427 val &= ~MVPP2_BM_LOW_THRESH_MASK; 428 val &= ~MVPP2_BM_HIGH_THRESH_MASK; 429 430 /* Set 8 Pools BPPI threshold for MVPP23 */ 431 if (priv->hw_version == MVPP23) { 432 val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP23_BM_BPPI_LOW_THRESH); 433 val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP23_BM_BPPI_HIGH_THRESH); 434 } else { 435 val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP2_BM_BPPI_LOW_THRESH); 436 val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP2_BM_BPPI_HIGH_THRESH); 437 } 438 439 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 440 441 bm_pool->size = size; 442 bm_pool->pkt_size = 0; 443 bm_pool->buf_num = 0; 444 445 return 0; 446 } 447 448 /* Set pool buffer size */ 449 static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv, 450 struct mvpp2_bm_pool *bm_pool, 451 int buf_size) 452 { 453 u32 val; 454 455 bm_pool->buf_size = buf_size; 456 457 val = ALIGN(buf_size, 1 << MVPP2_POOL_BUF_SIZE_OFFSET); 458 mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val); 459 } 460 461 static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv, 462 struct mvpp2_bm_pool *bm_pool, 463 dma_addr_t *dma_addr, 464 phys_addr_t *phys_addr) 465 { 466 unsigned int thread = mvpp2_cpu_to_thread(priv, get_cpu()); 467 468 *dma_addr = mvpp2_thread_read(priv, thread, 469 MVPP2_BM_PHY_ALLOC_REG(bm_pool->id)); 470 *phys_addr = mvpp2_thread_read(priv, thread, MVPP2_BM_VIRT_ALLOC_REG); 471 472 if (priv->hw_version >= MVPP22) { 473 u32 val; 474 u32 dma_addr_highbits, phys_addr_highbits; 475 476 val = mvpp2_thread_read(priv, thread, MVPP22_BM_ADDR_HIGH_ALLOC); 477 dma_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_PHYS_MASK); 478 phys_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_VIRT_MASK) >> 479 MVPP22_BM_ADDR_HIGH_VIRT_SHIFT; 480 481 if (sizeof(dma_addr_t) == 8) 482 *dma_addr |= (u64)dma_addr_highbits << 32; 483 484 if (sizeof(phys_addr_t) == 8) 485 *phys_addr |= (u64)phys_addr_highbits << 32; 486 } 487 488 put_cpu(); 489 } 490 491 /* Free all buffers from the pool */ 492 static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv, 493 struct mvpp2_bm_pool *bm_pool, int buf_num) 494 { 495 struct page_pool *pp = NULL; 496 int i; 497 498 if (buf_num > bm_pool->buf_num) { 499 WARN(1, "Pool does not have so many bufs pool(%d) bufs(%d)\n", 500 bm_pool->id, buf_num); 501 buf_num = bm_pool->buf_num; 502 } 503 504 if (priv->percpu_pools) 505 pp = priv->page_pool[bm_pool->id]; 506 507 for (i = 0; i < buf_num; i++) { 508 dma_addr_t buf_dma_addr; 509 phys_addr_t buf_phys_addr; 510 void *data; 511 512 mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool, 513 &buf_dma_addr, &buf_phys_addr); 514 515 if (!pp) 516 dma_unmap_single(dev, buf_dma_addr, 517 bm_pool->buf_size, DMA_FROM_DEVICE); 518 519 data = (void *)phys_to_virt(buf_phys_addr); 520 if (!data) 521 break; 522 523 mvpp2_frag_free(bm_pool, pp, data); 524 } 525 526 /* Update BM driver with number of buffers removed from pool */ 527 bm_pool->buf_num -= i; 528 } 529 530 /* Check number of buffers in BM pool */ 531 static int mvpp2_check_hw_buf_num(struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool) 532 { 533 int buf_num = 0; 534 535 buf_num += mvpp2_read(priv, MVPP2_BM_POOL_PTRS_NUM_REG(bm_pool->id)) & 536 MVPP22_BM_POOL_PTRS_NUM_MASK; 537 buf_num += mvpp2_read(priv, MVPP2_BM_BPPI_PTRS_NUM_REG(bm_pool->id)) & 538 MVPP2_BM_BPPI_PTR_NUM_MASK; 539 540 /* HW has one buffer ready which is not reflected in the counters */ 541 if (buf_num) 542 buf_num += 1; 543 544 return buf_num; 545 } 546 547 /* Cleanup pool */ 548 static int mvpp2_bm_pool_destroy(struct device *dev, struct mvpp2 *priv, 549 struct mvpp2_bm_pool *bm_pool) 550 { 551 int buf_num; 552 u32 val; 553 554 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 555 mvpp2_bm_bufs_free(dev, priv, bm_pool, buf_num); 556 557 /* Check buffer counters after free */ 558 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 559 if (buf_num) { 560 WARN(1, "cannot free all buffers in pool %d, buf_num left %d\n", 561 bm_pool->id, bm_pool->buf_num); 562 return 0; 563 } 564 565 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 566 val |= MVPP2_BM_STOP_MASK; 567 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 568 569 if (priv->percpu_pools) { 570 page_pool_destroy(priv->page_pool[bm_pool->id]); 571 priv->page_pool[bm_pool->id] = NULL; 572 } 573 574 dma_free_coherent(dev, bm_pool->size_bytes, 575 bm_pool->virt_addr, 576 bm_pool->dma_addr); 577 return 0; 578 } 579 580 static int mvpp2_bm_pools_init(struct device *dev, struct mvpp2 *priv) 581 { 582 int i, err, size, poolnum = MVPP2_BM_POOLS_NUM; 583 struct mvpp2_bm_pool *bm_pool; 584 585 if (priv->percpu_pools) 586 poolnum = mvpp2_get_nrxqs(priv) * 2; 587 588 /* Create all pools with maximum size */ 589 size = MVPP2_BM_POOL_SIZE_MAX; 590 for (i = 0; i < poolnum; i++) { 591 bm_pool = &priv->bm_pools[i]; 592 bm_pool->id = i; 593 err = mvpp2_bm_pool_create(dev, priv, bm_pool, size); 594 if (err) 595 goto err_unroll_pools; 596 mvpp2_bm_pool_bufsize_set(priv, bm_pool, 0); 597 } 598 return 0; 599 600 err_unroll_pools: 601 dev_err(dev, "failed to create BM pool %d, size %d\n", i, size); 602 for (i = i - 1; i >= 0; i--) 603 mvpp2_bm_pool_destroy(dev, priv, &priv->bm_pools[i]); 604 return err; 605 } 606 607 /* Routine enable PPv23 8 pool mode */ 608 static void mvpp23_bm_set_8pool_mode(struct mvpp2 *priv) 609 { 610 int val; 611 612 val = mvpp2_read(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG); 613 val |= MVPP23_BM_8POOL_MODE; 614 mvpp2_write(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG, val); 615 } 616 617 static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv) 618 { 619 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 620 int i, err, poolnum = MVPP2_BM_POOLS_NUM; 621 struct mvpp2_port *port; 622 623 if (priv->percpu_pools) { 624 for (i = 0; i < priv->port_count; i++) { 625 port = priv->port_list[i]; 626 if (port->xdp_prog) { 627 dma_dir = DMA_BIDIRECTIONAL; 628 break; 629 } 630 } 631 632 poolnum = mvpp2_get_nrxqs(priv) * 2; 633 for (i = 0; i < poolnum; i++) { 634 /* the pool in use */ 635 int pn = i / (poolnum / 2); 636 637 priv->page_pool[i] = 638 mvpp2_create_page_pool(dev, 639 mvpp2_pools[pn].buf_num, 640 mvpp2_pools[pn].pkt_size, 641 dma_dir); 642 if (IS_ERR(priv->page_pool[i])) { 643 int j; 644 645 for (j = 0; j < i; j++) { 646 page_pool_destroy(priv->page_pool[j]); 647 priv->page_pool[j] = NULL; 648 } 649 return PTR_ERR(priv->page_pool[i]); 650 } 651 } 652 } 653 654 dev_info(dev, "using %d %s buffers\n", poolnum, 655 priv->percpu_pools ? "per-cpu" : "shared"); 656 657 for (i = 0; i < poolnum; i++) { 658 /* Mask BM all interrupts */ 659 mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0); 660 /* Clear BM cause register */ 661 mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0); 662 } 663 664 /* Allocate and initialize BM pools */ 665 priv->bm_pools = devm_kcalloc(dev, poolnum, 666 sizeof(*priv->bm_pools), GFP_KERNEL); 667 if (!priv->bm_pools) 668 return -ENOMEM; 669 670 if (priv->hw_version == MVPP23) 671 mvpp23_bm_set_8pool_mode(priv); 672 673 err = mvpp2_bm_pools_init(dev, priv); 674 if (err < 0) 675 return err; 676 return 0; 677 } 678 679 static void mvpp2_setup_bm_pool(void) 680 { 681 /* Short pool */ 682 mvpp2_pools[MVPP2_BM_SHORT].buf_num = MVPP2_BM_SHORT_BUF_NUM; 683 mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE; 684 685 /* Long pool */ 686 mvpp2_pools[MVPP2_BM_LONG].buf_num = MVPP2_BM_LONG_BUF_NUM; 687 mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE; 688 689 /* Jumbo pool */ 690 mvpp2_pools[MVPP2_BM_JUMBO].buf_num = MVPP2_BM_JUMBO_BUF_NUM; 691 mvpp2_pools[MVPP2_BM_JUMBO].pkt_size = MVPP2_BM_JUMBO_PKT_SIZE; 692 } 693 694 /* Attach long pool to rxq */ 695 static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port, 696 int lrxq, int long_pool) 697 { 698 u32 val, mask; 699 int prxq; 700 701 /* Get queue physical ID */ 702 prxq = port->rxqs[lrxq]->id; 703 704 if (port->priv->hw_version == MVPP21) 705 mask = MVPP21_RXQ_POOL_LONG_MASK; 706 else 707 mask = MVPP22_RXQ_POOL_LONG_MASK; 708 709 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 710 val &= ~mask; 711 val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask; 712 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 713 } 714 715 /* Attach short pool to rxq */ 716 static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port, 717 int lrxq, int short_pool) 718 { 719 u32 val, mask; 720 int prxq; 721 722 /* Get queue physical ID */ 723 prxq = port->rxqs[lrxq]->id; 724 725 if (port->priv->hw_version == MVPP21) 726 mask = MVPP21_RXQ_POOL_SHORT_MASK; 727 else 728 mask = MVPP22_RXQ_POOL_SHORT_MASK; 729 730 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 731 val &= ~mask; 732 val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask; 733 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 734 } 735 736 static void *mvpp2_buf_alloc(struct mvpp2_port *port, 737 struct mvpp2_bm_pool *bm_pool, 738 struct page_pool *page_pool, 739 dma_addr_t *buf_dma_addr, 740 phys_addr_t *buf_phys_addr, 741 gfp_t gfp_mask) 742 { 743 dma_addr_t dma_addr; 744 struct page *page; 745 void *data; 746 747 data = mvpp2_frag_alloc(bm_pool, page_pool); 748 if (!data) 749 return NULL; 750 751 if (page_pool) { 752 page = (struct page *)data; 753 dma_addr = page_pool_get_dma_addr(page); 754 data = page_to_virt(page); 755 } else { 756 dma_addr = dma_map_single(port->dev->dev.parent, data, 757 MVPP2_RX_BUF_SIZE(bm_pool->pkt_size), 758 DMA_FROM_DEVICE); 759 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 760 mvpp2_frag_free(bm_pool, NULL, data); 761 return NULL; 762 } 763 } 764 *buf_dma_addr = dma_addr; 765 *buf_phys_addr = virt_to_phys(data); 766 767 return data; 768 } 769 770 /* Routine enable flow control for RXQs condition */ 771 static void mvpp2_rxq_enable_fc(struct mvpp2_port *port) 772 { 773 int val, cm3_state, host_id, q; 774 int fq = port->first_rxq; 775 unsigned long flags; 776 777 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 778 779 /* Remove Flow control enable bit to prevent race between FW and Kernel 780 * If Flow control was enabled, it would be re-enabled. 781 */ 782 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 783 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 784 val &= ~FLOW_CONTROL_ENABLE_BIT; 785 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 786 787 /* Set same Flow control for all RXQs */ 788 for (q = 0; q < port->nrxqs; q++) { 789 /* Set stop and start Flow control RXQ thresholds */ 790 val = MSS_THRESHOLD_START; 791 val |= (MSS_THRESHOLD_STOP << MSS_RXQ_TRESH_STOP_OFFS); 792 mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val); 793 794 val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq)); 795 /* Set RXQ port ID */ 796 val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq)); 797 val |= (port->id << MSS_RXQ_ASS_Q_BASE(q, fq)); 798 val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq) 799 + MSS_RXQ_ASS_HOSTID_OFFS)); 800 801 /* Calculate RXQ host ID: 802 * In Single queue mode: Host ID equal to Host ID used for 803 * shared RX interrupt 804 * In Multi queue mode: Host ID equal to number of 805 * RXQ ID / number of CoS queues 806 * In Single resource mode: Host ID always equal to 0 807 */ 808 if (queue_mode == MVPP2_QDIST_SINGLE_MODE) 809 host_id = port->nqvecs; 810 else if (queue_mode == MVPP2_QDIST_MULTI_MODE) 811 host_id = q; 812 else 813 host_id = 0; 814 815 /* Set RXQ host ID */ 816 val |= (host_id << (MSS_RXQ_ASS_Q_BASE(q, fq) 817 + MSS_RXQ_ASS_HOSTID_OFFS)); 818 819 mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val); 820 } 821 822 /* Notify Firmware that Flow control config space ready for update */ 823 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 824 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 825 val |= cm3_state; 826 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 827 828 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 829 } 830 831 /* Routine disable flow control for RXQs condition */ 832 static void mvpp2_rxq_disable_fc(struct mvpp2_port *port) 833 { 834 int val, cm3_state, q; 835 unsigned long flags; 836 int fq = port->first_rxq; 837 838 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 839 840 /* Remove Flow control enable bit to prevent race between FW and Kernel 841 * If Flow control was enabled, it would be re-enabled. 842 */ 843 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 844 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 845 val &= ~FLOW_CONTROL_ENABLE_BIT; 846 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 847 848 /* Disable Flow control for all RXQs */ 849 for (q = 0; q < port->nrxqs; q++) { 850 /* Set threshold 0 to disable Flow control */ 851 val = 0; 852 val |= (0 << MSS_RXQ_TRESH_STOP_OFFS); 853 mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val); 854 855 val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq)); 856 857 val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq)); 858 859 val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq) 860 + MSS_RXQ_ASS_HOSTID_OFFS)); 861 862 mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val); 863 } 864 865 /* Notify Firmware that Flow control config space ready for update */ 866 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 867 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 868 val |= cm3_state; 869 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 870 871 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 872 } 873 874 /* Routine disable/enable flow control for BM pool condition */ 875 static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port, 876 struct mvpp2_bm_pool *pool, 877 bool en) 878 { 879 int val, cm3_state; 880 unsigned long flags; 881 882 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 883 884 /* Remove Flow control enable bit to prevent race between FW and Kernel 885 * If Flow control were enabled, it would be re-enabled. 886 */ 887 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 888 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 889 val &= ~FLOW_CONTROL_ENABLE_BIT; 890 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 891 892 /* Check if BM pool should be enabled/disable */ 893 if (en) { 894 /* Set BM pool start and stop thresholds per port */ 895 val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); 896 val |= MSS_BUF_POOL_PORT_OFFS(port->id); 897 val &= ~MSS_BUF_POOL_START_MASK; 898 val |= (MSS_THRESHOLD_START << MSS_BUF_POOL_START_OFFS); 899 val &= ~MSS_BUF_POOL_STOP_MASK; 900 val |= MSS_THRESHOLD_STOP; 901 mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); 902 } else { 903 /* Remove BM pool from the port */ 904 val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); 905 val &= ~MSS_BUF_POOL_PORT_OFFS(port->id); 906 907 /* Zero BM pool start and stop thresholds to disable pool 908 * flow control if pool empty (not used by any port) 909 */ 910 if (!pool->buf_num) { 911 val &= ~MSS_BUF_POOL_START_MASK; 912 val &= ~MSS_BUF_POOL_STOP_MASK; 913 } 914 915 mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); 916 } 917 918 /* Notify Firmware that Flow control config space ready for update */ 919 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 920 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 921 val |= cm3_state; 922 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 923 924 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 925 } 926 927 /* disable/enable flow control for BM pool on all ports */ 928 static void mvpp2_bm_pool_update_priv_fc(struct mvpp2 *priv, bool en) 929 { 930 struct mvpp2_port *port; 931 int i; 932 933 for (i = 0; i < priv->port_count; i++) { 934 port = priv->port_list[i]; 935 if (port->priv->percpu_pools) { 936 for (i = 0; i < port->nrxqs; i++) 937 mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], 938 port->tx_fc & en); 939 } else { 940 mvpp2_bm_pool_update_fc(port, port->pool_long, port->tx_fc & en); 941 mvpp2_bm_pool_update_fc(port, port->pool_short, port->tx_fc & en); 942 } 943 } 944 } 945 946 static int mvpp2_enable_global_fc(struct mvpp2 *priv) 947 { 948 int val, timeout = 0; 949 950 /* Enable global flow control. In this stage global 951 * flow control enabled, but still disabled per port. 952 */ 953 val = mvpp2_cm3_read(priv, MSS_FC_COM_REG); 954 val |= FLOW_CONTROL_ENABLE_BIT; 955 mvpp2_cm3_write(priv, MSS_FC_COM_REG, val); 956 957 /* Check if Firmware running and disable FC if not*/ 958 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 959 mvpp2_cm3_write(priv, MSS_FC_COM_REG, val); 960 961 while (timeout < MSS_FC_MAX_TIMEOUT) { 962 val = mvpp2_cm3_read(priv, MSS_FC_COM_REG); 963 964 if (!(val & FLOW_CONTROL_UPDATE_COMMAND_BIT)) 965 return 0; 966 usleep_range(10, 20); 967 timeout++; 968 } 969 970 priv->global_tx_fc = false; 971 return -EOPNOTSUPP; 972 } 973 974 /* Release buffer to BM */ 975 static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, 976 dma_addr_t buf_dma_addr, 977 phys_addr_t buf_phys_addr) 978 { 979 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 980 unsigned long flags = 0; 981 982 if (test_bit(thread, &port->priv->lock_map)) 983 spin_lock_irqsave(&port->bm_lock[thread], flags); 984 985 if (port->priv->hw_version >= MVPP22) { 986 u32 val = 0; 987 988 if (sizeof(dma_addr_t) == 8) 989 val |= upper_32_bits(buf_dma_addr) & 990 MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK; 991 992 if (sizeof(phys_addr_t) == 8) 993 val |= (upper_32_bits(buf_phys_addr) 994 << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) & 995 MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK; 996 997 mvpp2_thread_write_relaxed(port->priv, thread, 998 MVPP22_BM_ADDR_HIGH_RLS_REG, val); 999 } 1000 1001 /* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply 1002 * returned in the "cookie" field of the RX 1003 * descriptor. Instead of storing the virtual address, we 1004 * store the physical address 1005 */ 1006 mvpp2_thread_write_relaxed(port->priv, thread, 1007 MVPP2_BM_VIRT_RLS_REG, buf_phys_addr); 1008 mvpp2_thread_write_relaxed(port->priv, thread, 1009 MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr); 1010 1011 if (test_bit(thread, &port->priv->lock_map)) 1012 spin_unlock_irqrestore(&port->bm_lock[thread], flags); 1013 1014 put_cpu(); 1015 } 1016 1017 /* Allocate buffers for the pool */ 1018 static int mvpp2_bm_bufs_add(struct mvpp2_port *port, 1019 struct mvpp2_bm_pool *bm_pool, int buf_num) 1020 { 1021 int i, buf_size, total_size; 1022 dma_addr_t dma_addr; 1023 phys_addr_t phys_addr; 1024 struct page_pool *pp = NULL; 1025 void *buf; 1026 1027 if (port->priv->percpu_pools && 1028 bm_pool->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 1029 netdev_err(port->dev, 1030 "attempted to use jumbo frames with per-cpu pools"); 1031 return 0; 1032 } 1033 1034 buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size); 1035 total_size = MVPP2_RX_TOTAL_SIZE(buf_size); 1036 1037 if (buf_num < 0 || 1038 (buf_num + bm_pool->buf_num > bm_pool->size)) { 1039 netdev_err(port->dev, 1040 "cannot allocate %d buffers for pool %d\n", 1041 buf_num, bm_pool->id); 1042 return 0; 1043 } 1044 1045 if (port->priv->percpu_pools) 1046 pp = port->priv->page_pool[bm_pool->id]; 1047 for (i = 0; i < buf_num; i++) { 1048 buf = mvpp2_buf_alloc(port, bm_pool, pp, &dma_addr, 1049 &phys_addr, GFP_KERNEL); 1050 if (!buf) 1051 break; 1052 1053 mvpp2_bm_pool_put(port, bm_pool->id, dma_addr, 1054 phys_addr); 1055 } 1056 1057 /* Update BM driver with number of buffers added to pool */ 1058 bm_pool->buf_num += i; 1059 1060 netdev_dbg(port->dev, 1061 "pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n", 1062 bm_pool->id, bm_pool->pkt_size, buf_size, total_size); 1063 1064 netdev_dbg(port->dev, 1065 "pool %d: %d of %d buffers added\n", 1066 bm_pool->id, i, buf_num); 1067 return i; 1068 } 1069 1070 /* Notify the driver that BM pool is being used as specific type and return the 1071 * pool pointer on success 1072 */ 1073 static struct mvpp2_bm_pool * 1074 mvpp2_bm_pool_use(struct mvpp2_port *port, unsigned pool, int pkt_size) 1075 { 1076 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 1077 int num; 1078 1079 if ((port->priv->percpu_pools && pool > mvpp2_get_nrxqs(port->priv) * 2) || 1080 (!port->priv->percpu_pools && pool >= MVPP2_BM_POOLS_NUM)) { 1081 netdev_err(port->dev, "Invalid pool %d\n", pool); 1082 return NULL; 1083 } 1084 1085 /* Allocate buffers in case BM pool is used as long pool, but packet 1086 * size doesn't match MTU or BM pool hasn't being used yet 1087 */ 1088 if (new_pool->pkt_size == 0) { 1089 int pkts_num; 1090 1091 /* Set default buffer number or free all the buffers in case 1092 * the pool is not empty 1093 */ 1094 pkts_num = new_pool->buf_num; 1095 if (pkts_num == 0) { 1096 if (port->priv->percpu_pools) { 1097 if (pool < port->nrxqs) 1098 pkts_num = mvpp2_pools[MVPP2_BM_SHORT].buf_num; 1099 else 1100 pkts_num = mvpp2_pools[MVPP2_BM_LONG].buf_num; 1101 } else { 1102 pkts_num = mvpp2_pools[pool].buf_num; 1103 } 1104 } else { 1105 mvpp2_bm_bufs_free(port->dev->dev.parent, 1106 port->priv, new_pool, pkts_num); 1107 } 1108 1109 new_pool->pkt_size = pkt_size; 1110 new_pool->frag_size = 1111 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 1112 MVPP2_SKB_SHINFO_SIZE; 1113 1114 /* Allocate buffers for this pool */ 1115 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 1116 if (num != pkts_num) { 1117 WARN(1, "pool %d: %d of %d allocated\n", 1118 new_pool->id, num, pkts_num); 1119 return NULL; 1120 } 1121 } 1122 1123 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 1124 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 1125 1126 return new_pool; 1127 } 1128 1129 static struct mvpp2_bm_pool * 1130 mvpp2_bm_pool_use_percpu(struct mvpp2_port *port, int type, 1131 unsigned int pool, int pkt_size) 1132 { 1133 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 1134 int num; 1135 1136 if (pool > port->nrxqs * 2) { 1137 netdev_err(port->dev, "Invalid pool %d\n", pool); 1138 return NULL; 1139 } 1140 1141 /* Allocate buffers in case BM pool is used as long pool, but packet 1142 * size doesn't match MTU or BM pool hasn't being used yet 1143 */ 1144 if (new_pool->pkt_size == 0) { 1145 int pkts_num; 1146 1147 /* Set default buffer number or free all the buffers in case 1148 * the pool is not empty 1149 */ 1150 pkts_num = new_pool->buf_num; 1151 if (pkts_num == 0) 1152 pkts_num = mvpp2_pools[type].buf_num; 1153 else 1154 mvpp2_bm_bufs_free(port->dev->dev.parent, 1155 port->priv, new_pool, pkts_num); 1156 1157 new_pool->pkt_size = pkt_size; 1158 new_pool->frag_size = 1159 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 1160 MVPP2_SKB_SHINFO_SIZE; 1161 1162 /* Allocate buffers for this pool */ 1163 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 1164 if (num != pkts_num) { 1165 WARN(1, "pool %d: %d of %d allocated\n", 1166 new_pool->id, num, pkts_num); 1167 return NULL; 1168 } 1169 } 1170 1171 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 1172 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 1173 1174 return new_pool; 1175 } 1176 1177 /* Initialize pools for swf, shared buffers variant */ 1178 static int mvpp2_swf_bm_pool_init_shared(struct mvpp2_port *port) 1179 { 1180 enum mvpp2_bm_pool_log_num long_log_pool, short_log_pool; 1181 int rxq; 1182 1183 /* If port pkt_size is higher than 1518B: 1184 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 1185 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 1186 */ 1187 if (port->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 1188 long_log_pool = MVPP2_BM_JUMBO; 1189 short_log_pool = MVPP2_BM_LONG; 1190 } else { 1191 long_log_pool = MVPP2_BM_LONG; 1192 short_log_pool = MVPP2_BM_SHORT; 1193 } 1194 1195 if (!port->pool_long) { 1196 port->pool_long = 1197 mvpp2_bm_pool_use(port, long_log_pool, 1198 mvpp2_pools[long_log_pool].pkt_size); 1199 if (!port->pool_long) 1200 return -ENOMEM; 1201 1202 port->pool_long->port_map |= BIT(port->id); 1203 1204 for (rxq = 0; rxq < port->nrxqs; rxq++) 1205 mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id); 1206 } 1207 1208 if (!port->pool_short) { 1209 port->pool_short = 1210 mvpp2_bm_pool_use(port, short_log_pool, 1211 mvpp2_pools[short_log_pool].pkt_size); 1212 if (!port->pool_short) 1213 return -ENOMEM; 1214 1215 port->pool_short->port_map |= BIT(port->id); 1216 1217 for (rxq = 0; rxq < port->nrxqs; rxq++) 1218 mvpp2_rxq_short_pool_set(port, rxq, 1219 port->pool_short->id); 1220 } 1221 1222 return 0; 1223 } 1224 1225 /* Initialize pools for swf, percpu buffers variant */ 1226 static int mvpp2_swf_bm_pool_init_percpu(struct mvpp2_port *port) 1227 { 1228 struct mvpp2_bm_pool *bm_pool; 1229 int i; 1230 1231 for (i = 0; i < port->nrxqs; i++) { 1232 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_SHORT, i, 1233 mvpp2_pools[MVPP2_BM_SHORT].pkt_size); 1234 if (!bm_pool) 1235 return -ENOMEM; 1236 1237 bm_pool->port_map |= BIT(port->id); 1238 mvpp2_rxq_short_pool_set(port, i, bm_pool->id); 1239 } 1240 1241 for (i = 0; i < port->nrxqs; i++) { 1242 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_LONG, i + port->nrxqs, 1243 mvpp2_pools[MVPP2_BM_LONG].pkt_size); 1244 if (!bm_pool) 1245 return -ENOMEM; 1246 1247 bm_pool->port_map |= BIT(port->id); 1248 mvpp2_rxq_long_pool_set(port, i, bm_pool->id); 1249 } 1250 1251 port->pool_long = NULL; 1252 port->pool_short = NULL; 1253 1254 return 0; 1255 } 1256 1257 static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port) 1258 { 1259 if (port->priv->percpu_pools) 1260 return mvpp2_swf_bm_pool_init_percpu(port); 1261 else 1262 return mvpp2_swf_bm_pool_init_shared(port); 1263 } 1264 1265 static void mvpp2_set_hw_csum(struct mvpp2_port *port, 1266 enum mvpp2_bm_pool_log_num new_long_pool) 1267 { 1268 const netdev_features_t csums = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1269 1270 /* Update L4 checksum when jumbo enable/disable on port. 1271 * Only port 0 supports hardware checksum offload due to 1272 * the Tx FIFO size limitation. 1273 * Also, don't set NETIF_F_HW_CSUM because L3_offset in TX descriptor 1274 * has 7 bits, so the maximum L3 offset is 128. 1275 */ 1276 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 1277 port->dev->features &= ~csums; 1278 port->dev->hw_features &= ~csums; 1279 } else { 1280 port->dev->features |= csums; 1281 port->dev->hw_features |= csums; 1282 } 1283 } 1284 1285 static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) 1286 { 1287 struct mvpp2_port *port = netdev_priv(dev); 1288 enum mvpp2_bm_pool_log_num new_long_pool; 1289 int pkt_size = MVPP2_RX_PKT_SIZE(mtu); 1290 1291 if (port->priv->percpu_pools) 1292 goto out_set; 1293 1294 /* If port MTU is higher than 1518B: 1295 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 1296 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 1297 */ 1298 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1299 new_long_pool = MVPP2_BM_JUMBO; 1300 else 1301 new_long_pool = MVPP2_BM_LONG; 1302 1303 if (new_long_pool != port->pool_long->id) { 1304 if (port->tx_fc) { 1305 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1306 mvpp2_bm_pool_update_fc(port, 1307 port->pool_short, 1308 false); 1309 else 1310 mvpp2_bm_pool_update_fc(port, port->pool_long, 1311 false); 1312 } 1313 1314 /* Remove port from old short & long pool */ 1315 port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id, 1316 port->pool_long->pkt_size); 1317 port->pool_long->port_map &= ~BIT(port->id); 1318 port->pool_long = NULL; 1319 1320 port->pool_short = mvpp2_bm_pool_use(port, port->pool_short->id, 1321 port->pool_short->pkt_size); 1322 port->pool_short->port_map &= ~BIT(port->id); 1323 port->pool_short = NULL; 1324 1325 port->pkt_size = pkt_size; 1326 1327 /* Add port to new short & long pool */ 1328 mvpp2_swf_bm_pool_init(port); 1329 1330 mvpp2_set_hw_csum(port, new_long_pool); 1331 1332 if (port->tx_fc) { 1333 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1334 mvpp2_bm_pool_update_fc(port, port->pool_long, 1335 true); 1336 else 1337 mvpp2_bm_pool_update_fc(port, port->pool_short, 1338 true); 1339 } 1340 1341 /* Update L4 checksum when jumbo enable/disable on port */ 1342 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 1343 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); 1344 dev->hw_features &= ~(NETIF_F_IP_CSUM | 1345 NETIF_F_IPV6_CSUM); 1346 } else { 1347 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1348 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1349 } 1350 } 1351 1352 out_set: 1353 dev->mtu = mtu; 1354 dev->wanted_features = dev->features; 1355 1356 netdev_update_features(dev); 1357 return 0; 1358 } 1359 1360 static inline void mvpp2_interrupts_enable(struct mvpp2_port *port) 1361 { 1362 int i, sw_thread_mask = 0; 1363 1364 for (i = 0; i < port->nqvecs; i++) 1365 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1366 1367 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1368 MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask)); 1369 } 1370 1371 static inline void mvpp2_interrupts_disable(struct mvpp2_port *port) 1372 { 1373 int i, sw_thread_mask = 0; 1374 1375 for (i = 0; i < port->nqvecs; i++) 1376 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1377 1378 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1379 MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask)); 1380 } 1381 1382 static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec) 1383 { 1384 struct mvpp2_port *port = qvec->port; 1385 1386 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1387 MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask)); 1388 } 1389 1390 static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) 1391 { 1392 struct mvpp2_port *port = qvec->port; 1393 1394 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1395 MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask)); 1396 } 1397 1398 /* Mask the current thread's Rx/Tx interrupts 1399 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1400 * using smp_processor_id() is OK. 1401 */ 1402 static void mvpp2_interrupts_mask(void *arg) 1403 { 1404 struct mvpp2_port *port = arg; 1405 int cpu = smp_processor_id(); 1406 u32 thread; 1407 1408 /* If the thread isn't used, don't do anything */ 1409 if (cpu > port->priv->nthreads) 1410 return; 1411 1412 thread = mvpp2_cpu_to_thread(port->priv, cpu); 1413 1414 mvpp2_thread_write(port->priv, thread, 1415 MVPP2_ISR_RX_TX_MASK_REG(port->id), 0); 1416 mvpp2_thread_write(port->priv, thread, 1417 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 0); 1418 } 1419 1420 /* Unmask the current thread's Rx/Tx interrupts. 1421 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1422 * using smp_processor_id() is OK. 1423 */ 1424 static void mvpp2_interrupts_unmask(void *arg) 1425 { 1426 struct mvpp2_port *port = arg; 1427 int cpu = smp_processor_id(); 1428 u32 val, thread; 1429 1430 /* If the thread isn't used, don't do anything */ 1431 if (cpu >= port->priv->nthreads) 1432 return; 1433 1434 thread = mvpp2_cpu_to_thread(port->priv, cpu); 1435 1436 val = MVPP2_CAUSE_MISC_SUM_MASK | 1437 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 1438 if (port->has_tx_irqs) 1439 val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 1440 1441 mvpp2_thread_write(port->priv, thread, 1442 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1443 mvpp2_thread_write(port->priv, thread, 1444 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 1445 MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); 1446 } 1447 1448 static void 1449 mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask) 1450 { 1451 u32 val; 1452 int i; 1453 1454 if (port->priv->hw_version == MVPP21) 1455 return; 1456 1457 if (mask) 1458 val = 0; 1459 else 1460 val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(MVPP22); 1461 1462 for (i = 0; i < port->nqvecs; i++) { 1463 struct mvpp2_queue_vector *v = port->qvecs + i; 1464 1465 if (v->type != MVPP2_QUEUE_VECTOR_SHARED) 1466 continue; 1467 1468 mvpp2_thread_write(port->priv, v->sw_thread_id, 1469 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1470 mvpp2_thread_write(port->priv, v->sw_thread_id, 1471 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 1472 MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); 1473 } 1474 } 1475 1476 /* Only GOP port 0 has an XLG MAC */ 1477 static bool mvpp2_port_supports_xlg(struct mvpp2_port *port) 1478 { 1479 return port->gop_id == 0; 1480 } 1481 1482 static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port) 1483 { 1484 return !(port->priv->hw_version >= MVPP22 && port->gop_id == 0); 1485 } 1486 1487 /* Port configuration routines */ 1488 static bool mvpp2_is_xlg(phy_interface_t interface) 1489 { 1490 return interface == PHY_INTERFACE_MODE_10GBASER || 1491 interface == PHY_INTERFACE_MODE_XAUI; 1492 } 1493 1494 static void mvpp2_modify(void __iomem *ptr, u32 mask, u32 set) 1495 { 1496 u32 old, val; 1497 1498 old = val = readl(ptr); 1499 val &= ~mask; 1500 val |= set; 1501 if (old != val) 1502 writel(val, ptr); 1503 } 1504 1505 static void mvpp22_gop_init_rgmii(struct mvpp2_port *port) 1506 { 1507 struct mvpp2 *priv = port->priv; 1508 u32 val; 1509 1510 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1511 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT; 1512 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1513 1514 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1515 if (port->gop_id == 2) 1516 val |= GENCONF_CTRL0_PORT2_RGMII; 1517 else if (port->gop_id == 3) 1518 val |= GENCONF_CTRL0_PORT3_RGMII_MII; 1519 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1520 } 1521 1522 static void mvpp22_gop_init_sgmii(struct mvpp2_port *port) 1523 { 1524 struct mvpp2 *priv = port->priv; 1525 u32 val; 1526 1527 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1528 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT | 1529 GENCONF_PORT_CTRL0_RX_DATA_SAMPLE; 1530 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1531 1532 if (port->gop_id > 1) { 1533 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1534 if (port->gop_id == 2) 1535 val &= ~GENCONF_CTRL0_PORT2_RGMII; 1536 else if (port->gop_id == 3) 1537 val &= ~GENCONF_CTRL0_PORT3_RGMII_MII; 1538 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1539 } 1540 } 1541 1542 static void mvpp22_gop_init_10gkr(struct mvpp2_port *port) 1543 { 1544 struct mvpp2 *priv = port->priv; 1545 void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 1546 void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 1547 u32 val; 1548 1549 val = readl(xpcs + MVPP22_XPCS_CFG0); 1550 val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) | 1551 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3)); 1552 val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2); 1553 writel(val, xpcs + MVPP22_XPCS_CFG0); 1554 1555 val = readl(mpcs + MVPP22_MPCS_CTRL); 1556 val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN; 1557 writel(val, mpcs + MVPP22_MPCS_CTRL); 1558 1559 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1560 val &= ~MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7); 1561 val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1); 1562 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1563 } 1564 1565 static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en) 1566 { 1567 struct mvpp2 *priv = port->priv; 1568 void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); 1569 u32 val; 1570 1571 val = readl(fca + MVPP22_FCA_CONTROL_REG); 1572 val &= ~MVPP22_FCA_ENABLE_PERIODIC; 1573 if (en) 1574 val |= MVPP22_FCA_ENABLE_PERIODIC; 1575 writel(val, fca + MVPP22_FCA_CONTROL_REG); 1576 } 1577 1578 static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer) 1579 { 1580 struct mvpp2 *priv = port->priv; 1581 void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); 1582 u32 lsb, msb; 1583 1584 lsb = timer & MVPP22_FCA_REG_MASK; 1585 msb = timer >> MVPP22_FCA_REG_SIZE; 1586 1587 writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG); 1588 writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG); 1589 } 1590 1591 /* Set Flow Control timer x100 faster than pause quanta to ensure that link 1592 * partner won't send traffic if port is in XOFF mode. 1593 */ 1594 static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port) 1595 { 1596 u32 timer; 1597 1598 timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER)) 1599 * FC_QUANTA; 1600 1601 mvpp22_gop_fca_enable_periodic(port, false); 1602 1603 mvpp22_gop_fca_set_timer(port, timer); 1604 1605 mvpp22_gop_fca_enable_periodic(port, true); 1606 } 1607 1608 static int mvpp22_gop_init(struct mvpp2_port *port) 1609 { 1610 struct mvpp2 *priv = port->priv; 1611 u32 val; 1612 1613 if (!priv->sysctrl_base) 1614 return 0; 1615 1616 switch (port->phy_interface) { 1617 case PHY_INTERFACE_MODE_RGMII: 1618 case PHY_INTERFACE_MODE_RGMII_ID: 1619 case PHY_INTERFACE_MODE_RGMII_RXID: 1620 case PHY_INTERFACE_MODE_RGMII_TXID: 1621 if (!mvpp2_port_supports_rgmii(port)) 1622 goto invalid_conf; 1623 mvpp22_gop_init_rgmii(port); 1624 break; 1625 case PHY_INTERFACE_MODE_SGMII: 1626 case PHY_INTERFACE_MODE_1000BASEX: 1627 case PHY_INTERFACE_MODE_2500BASEX: 1628 mvpp22_gop_init_sgmii(port); 1629 break; 1630 case PHY_INTERFACE_MODE_10GBASER: 1631 if (!mvpp2_port_supports_xlg(port)) 1632 goto invalid_conf; 1633 mvpp22_gop_init_10gkr(port); 1634 break; 1635 default: 1636 goto unsupported_conf; 1637 } 1638 1639 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val); 1640 val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) | 1641 GENCONF_PORT_CTRL1_EN(port->gop_id); 1642 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val); 1643 1644 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1645 val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR; 1646 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1647 1648 regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val); 1649 val |= GENCONF_SOFT_RESET1_GOP; 1650 regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val); 1651 1652 mvpp22_gop_fca_set_periodic_timer(port); 1653 1654 unsupported_conf: 1655 return 0; 1656 1657 invalid_conf: 1658 netdev_err(port->dev, "Invalid port configuration\n"); 1659 return -EINVAL; 1660 } 1661 1662 static void mvpp22_gop_unmask_irq(struct mvpp2_port *port) 1663 { 1664 u32 val; 1665 1666 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1667 phy_interface_mode_is_8023z(port->phy_interface) || 1668 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1669 /* Enable the GMAC link status irq for this port */ 1670 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1671 val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1672 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1673 } 1674 1675 if (mvpp2_port_supports_xlg(port)) { 1676 /* Enable the XLG/GIG irqs for this port */ 1677 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1678 if (mvpp2_is_xlg(port->phy_interface)) 1679 val |= MVPP22_XLG_EXT_INT_MASK_XLG; 1680 else 1681 val |= MVPP22_XLG_EXT_INT_MASK_GIG; 1682 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1683 } 1684 } 1685 1686 static void mvpp22_gop_mask_irq(struct mvpp2_port *port) 1687 { 1688 u32 val; 1689 1690 if (mvpp2_port_supports_xlg(port)) { 1691 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1692 val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG | 1693 MVPP22_XLG_EXT_INT_MASK_GIG); 1694 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1695 } 1696 1697 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1698 phy_interface_mode_is_8023z(port->phy_interface) || 1699 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1700 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1701 val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1702 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1703 } 1704 } 1705 1706 static void mvpp22_gop_setup_irq(struct mvpp2_port *port) 1707 { 1708 u32 val; 1709 1710 mvpp2_modify(port->base + MVPP22_GMAC_INT_SUM_MASK, 1711 MVPP22_GMAC_INT_SUM_MASK_PTP, 1712 MVPP22_GMAC_INT_SUM_MASK_PTP); 1713 1714 if (port->phylink || 1715 phy_interface_mode_is_rgmii(port->phy_interface) || 1716 phy_interface_mode_is_8023z(port->phy_interface) || 1717 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1718 val = readl(port->base + MVPP22_GMAC_INT_MASK); 1719 val |= MVPP22_GMAC_INT_MASK_LINK_STAT; 1720 writel(val, port->base + MVPP22_GMAC_INT_MASK); 1721 } 1722 1723 if (mvpp2_port_supports_xlg(port)) { 1724 val = readl(port->base + MVPP22_XLG_INT_MASK); 1725 val |= MVPP22_XLG_INT_MASK_LINK; 1726 writel(val, port->base + MVPP22_XLG_INT_MASK); 1727 1728 mvpp2_modify(port->base + MVPP22_XLG_EXT_INT_MASK, 1729 MVPP22_XLG_EXT_INT_MASK_PTP, 1730 MVPP22_XLG_EXT_INT_MASK_PTP); 1731 } 1732 1733 mvpp22_gop_unmask_irq(port); 1734 } 1735 1736 /* Sets the PHY mode of the COMPHY (which configures the serdes lanes). 1737 * 1738 * The PHY mode used by the PPv2 driver comes from the network subsystem, while 1739 * the one given to the COMPHY comes from the generic PHY subsystem. Hence they 1740 * differ. 1741 * 1742 * The COMPHY configures the serdes lanes regardless of the actual use of the 1743 * lanes by the physical layer. This is why configurations like 1744 * "PPv2 (2500BaseX) - COMPHY (2500SGMII)" are valid. 1745 */ 1746 static int mvpp22_comphy_init(struct mvpp2_port *port) 1747 { 1748 int ret; 1749 1750 if (!port->comphy) 1751 return 0; 1752 1753 ret = phy_set_mode_ext(port->comphy, PHY_MODE_ETHERNET, 1754 port->phy_interface); 1755 if (ret) 1756 return ret; 1757 1758 return phy_power_on(port->comphy); 1759 } 1760 1761 static void mvpp2_port_enable(struct mvpp2_port *port) 1762 { 1763 u32 val; 1764 1765 if (mvpp2_port_supports_xlg(port) && 1766 mvpp2_is_xlg(port->phy_interface)) { 1767 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1768 val |= MVPP22_XLG_CTRL0_PORT_EN; 1769 val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS; 1770 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1771 } else { 1772 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1773 val |= MVPP2_GMAC_PORT_EN_MASK; 1774 val |= MVPP2_GMAC_MIB_CNTR_EN_MASK; 1775 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1776 } 1777 } 1778 1779 static void mvpp2_port_disable(struct mvpp2_port *port) 1780 { 1781 u32 val; 1782 1783 if (mvpp2_port_supports_xlg(port) && 1784 mvpp2_is_xlg(port->phy_interface)) { 1785 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1786 val &= ~MVPP22_XLG_CTRL0_PORT_EN; 1787 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1788 } 1789 1790 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1791 val &= ~(MVPP2_GMAC_PORT_EN_MASK); 1792 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1793 } 1794 1795 /* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */ 1796 static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port) 1797 { 1798 u32 val; 1799 1800 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) & 1801 ~MVPP2_GMAC_PERIODIC_XON_EN_MASK; 1802 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1803 } 1804 1805 /* Configure loopback port */ 1806 static void mvpp2_port_loopback_set(struct mvpp2_port *port, 1807 const struct phylink_link_state *state) 1808 { 1809 u32 val; 1810 1811 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 1812 1813 if (state->speed == 1000) 1814 val |= MVPP2_GMAC_GMII_LB_EN_MASK; 1815 else 1816 val &= ~MVPP2_GMAC_GMII_LB_EN_MASK; 1817 1818 if (phy_interface_mode_is_8023z(state->interface) || 1819 state->interface == PHY_INTERFACE_MODE_SGMII) 1820 val |= MVPP2_GMAC_PCS_LB_EN_MASK; 1821 else 1822 val &= ~MVPP2_GMAC_PCS_LB_EN_MASK; 1823 1824 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1825 } 1826 1827 enum { 1828 ETHTOOL_XDP_REDIRECT, 1829 ETHTOOL_XDP_PASS, 1830 ETHTOOL_XDP_DROP, 1831 ETHTOOL_XDP_TX, 1832 ETHTOOL_XDP_TX_ERR, 1833 ETHTOOL_XDP_XMIT, 1834 ETHTOOL_XDP_XMIT_ERR, 1835 }; 1836 1837 struct mvpp2_ethtool_counter { 1838 unsigned int offset; 1839 const char string[ETH_GSTRING_LEN]; 1840 bool reg_is_64b; 1841 }; 1842 1843 static u64 mvpp2_read_count(struct mvpp2_port *port, 1844 const struct mvpp2_ethtool_counter *counter) 1845 { 1846 u64 val; 1847 1848 val = readl(port->stats_base + counter->offset); 1849 if (counter->reg_is_64b) 1850 val += (u64)readl(port->stats_base + counter->offset + 4) << 32; 1851 1852 return val; 1853 } 1854 1855 /* Some counters are accessed indirectly by first writing an index to 1856 * MVPP2_CTRS_IDX. The index can represent various resources depending on the 1857 * register we access, it can be a hit counter for some classification tables, 1858 * a counter specific to a rxq, a txq or a buffer pool. 1859 */ 1860 static u32 mvpp2_read_index(struct mvpp2 *priv, u32 index, u32 reg) 1861 { 1862 mvpp2_write(priv, MVPP2_CTRS_IDX, index); 1863 return mvpp2_read(priv, reg); 1864 } 1865 1866 /* Due to the fact that software statistics and hardware statistics are, by 1867 * design, incremented at different moments in the chain of packet processing, 1868 * it is very likely that incoming packets could have been dropped after being 1869 * counted by hardware but before reaching software statistics (most probably 1870 * multicast packets), and in the oppposite way, during transmission, FCS bytes 1871 * are added in between as well as TSO skb will be split and header bytes added. 1872 * Hence, statistics gathered from userspace with ifconfig (software) and 1873 * ethtool (hardware) cannot be compared. 1874 */ 1875 static const struct mvpp2_ethtool_counter mvpp2_ethtool_mib_regs[] = { 1876 { MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true }, 1877 { MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" }, 1878 { MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" }, 1879 { MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" }, 1880 { MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" }, 1881 { MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" }, 1882 { MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" }, 1883 { MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" }, 1884 { MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" }, 1885 { MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" }, 1886 { MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" }, 1887 { MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" }, 1888 { MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true }, 1889 { MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" }, 1890 { MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" }, 1891 { MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" }, 1892 { MVPP2_MIB_FC_SENT, "fc_sent" }, 1893 { MVPP2_MIB_FC_RCVD, "fc_received" }, 1894 { MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" }, 1895 { MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" }, 1896 { MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" }, 1897 { MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" }, 1898 { MVPP2_MIB_JABBER_RCVD, "jabber_received" }, 1899 { MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" }, 1900 { MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" }, 1901 { MVPP2_MIB_COLLISION, "collision" }, 1902 { MVPP2_MIB_LATE_COLLISION, "late_collision" }, 1903 }; 1904 1905 static const struct mvpp2_ethtool_counter mvpp2_ethtool_port_regs[] = { 1906 { MVPP2_OVERRUN_ETH_DROP, "rx_fifo_or_parser_overrun_drops" }, 1907 { MVPP2_CLS_ETH_DROP, "rx_classifier_drops" }, 1908 }; 1909 1910 static const struct mvpp2_ethtool_counter mvpp2_ethtool_txq_regs[] = { 1911 { MVPP2_TX_DESC_ENQ_CTR, "txq_%d_desc_enqueue" }, 1912 { MVPP2_TX_DESC_ENQ_TO_DDR_CTR, "txq_%d_desc_enqueue_to_ddr" }, 1913 { MVPP2_TX_BUFF_ENQ_TO_DDR_CTR, "txq_%d_buff_euqueue_to_ddr" }, 1914 { MVPP2_TX_DESC_ENQ_HW_FWD_CTR, "txq_%d_desc_hardware_forwarded" }, 1915 { MVPP2_TX_PKTS_DEQ_CTR, "txq_%d_packets_dequeued" }, 1916 { MVPP2_TX_PKTS_FULL_QUEUE_DROP_CTR, "txq_%d_queue_full_drops" }, 1917 { MVPP2_TX_PKTS_EARLY_DROP_CTR, "txq_%d_packets_early_drops" }, 1918 { MVPP2_TX_PKTS_BM_DROP_CTR, "txq_%d_packets_bm_drops" }, 1919 { MVPP2_TX_PKTS_BM_MC_DROP_CTR, "txq_%d_packets_rep_bm_drops" }, 1920 }; 1921 1922 static const struct mvpp2_ethtool_counter mvpp2_ethtool_rxq_regs[] = { 1923 { MVPP2_RX_DESC_ENQ_CTR, "rxq_%d_desc_enqueue" }, 1924 { MVPP2_RX_PKTS_FULL_QUEUE_DROP_CTR, "rxq_%d_queue_full_drops" }, 1925 { MVPP2_RX_PKTS_EARLY_DROP_CTR, "rxq_%d_packets_early_drops" }, 1926 { MVPP2_RX_PKTS_BM_DROP_CTR, "rxq_%d_packets_bm_drops" }, 1927 }; 1928 1929 static const struct mvpp2_ethtool_counter mvpp2_ethtool_xdp[] = { 1930 { ETHTOOL_XDP_REDIRECT, "rx_xdp_redirect", }, 1931 { ETHTOOL_XDP_PASS, "rx_xdp_pass", }, 1932 { ETHTOOL_XDP_DROP, "rx_xdp_drop", }, 1933 { ETHTOOL_XDP_TX, "rx_xdp_tx", }, 1934 { ETHTOOL_XDP_TX_ERR, "rx_xdp_tx_errors", }, 1935 { ETHTOOL_XDP_XMIT, "tx_xdp_xmit", }, 1936 { ETHTOOL_XDP_XMIT_ERR, "tx_xdp_xmit_errors", }, 1937 }; 1938 1939 #define MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs) (ARRAY_SIZE(mvpp2_ethtool_mib_regs) + \ 1940 ARRAY_SIZE(mvpp2_ethtool_port_regs) + \ 1941 (ARRAY_SIZE(mvpp2_ethtool_txq_regs) * (ntxqs)) + \ 1942 (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)) + \ 1943 ARRAY_SIZE(mvpp2_ethtool_xdp)) 1944 1945 static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset, 1946 u8 *data) 1947 { 1948 struct mvpp2_port *port = netdev_priv(netdev); 1949 int i, q; 1950 1951 if (sset != ETH_SS_STATS) 1952 return; 1953 1954 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) { 1955 strscpy(data, mvpp2_ethtool_mib_regs[i].string, 1956 ETH_GSTRING_LEN); 1957 data += ETH_GSTRING_LEN; 1958 } 1959 1960 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) { 1961 strscpy(data, mvpp2_ethtool_port_regs[i].string, 1962 ETH_GSTRING_LEN); 1963 data += ETH_GSTRING_LEN; 1964 } 1965 1966 for (q = 0; q < port->ntxqs; q++) { 1967 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) { 1968 snprintf(data, ETH_GSTRING_LEN, 1969 mvpp2_ethtool_txq_regs[i].string, q); 1970 data += ETH_GSTRING_LEN; 1971 } 1972 } 1973 1974 for (q = 0; q < port->nrxqs; q++) { 1975 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) { 1976 snprintf(data, ETH_GSTRING_LEN, 1977 mvpp2_ethtool_rxq_regs[i].string, 1978 q); 1979 data += ETH_GSTRING_LEN; 1980 } 1981 } 1982 1983 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_xdp); i++) { 1984 strscpy(data, mvpp2_ethtool_xdp[i].string, 1985 ETH_GSTRING_LEN); 1986 data += ETH_GSTRING_LEN; 1987 } 1988 } 1989 1990 static void 1991 mvpp2_get_xdp_stats(struct mvpp2_port *port, struct mvpp2_pcpu_stats *xdp_stats) 1992 { 1993 unsigned int start; 1994 unsigned int cpu; 1995 1996 /* Gather XDP Statistics */ 1997 for_each_possible_cpu(cpu) { 1998 struct mvpp2_pcpu_stats *cpu_stats; 1999 u64 xdp_redirect; 2000 u64 xdp_pass; 2001 u64 xdp_drop; 2002 u64 xdp_xmit; 2003 u64 xdp_xmit_err; 2004 u64 xdp_tx; 2005 u64 xdp_tx_err; 2006 2007 cpu_stats = per_cpu_ptr(port->stats, cpu); 2008 do { 2009 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 2010 xdp_redirect = cpu_stats->xdp_redirect; 2011 xdp_pass = cpu_stats->xdp_pass; 2012 xdp_drop = cpu_stats->xdp_drop; 2013 xdp_xmit = cpu_stats->xdp_xmit; 2014 xdp_xmit_err = cpu_stats->xdp_xmit_err; 2015 xdp_tx = cpu_stats->xdp_tx; 2016 xdp_tx_err = cpu_stats->xdp_tx_err; 2017 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 2018 2019 xdp_stats->xdp_redirect += xdp_redirect; 2020 xdp_stats->xdp_pass += xdp_pass; 2021 xdp_stats->xdp_drop += xdp_drop; 2022 xdp_stats->xdp_xmit += xdp_xmit; 2023 xdp_stats->xdp_xmit_err += xdp_xmit_err; 2024 xdp_stats->xdp_tx += xdp_tx; 2025 xdp_stats->xdp_tx_err += xdp_tx_err; 2026 } 2027 } 2028 2029 static void mvpp2_read_stats(struct mvpp2_port *port) 2030 { 2031 struct mvpp2_pcpu_stats xdp_stats = {}; 2032 const struct mvpp2_ethtool_counter *s; 2033 u64 *pstats; 2034 int i, q; 2035 2036 pstats = port->ethtool_stats; 2037 2038 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) 2039 *pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_mib_regs[i]); 2040 2041 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) 2042 *pstats++ += mvpp2_read(port->priv, 2043 mvpp2_ethtool_port_regs[i].offset + 2044 4 * port->id); 2045 2046 for (q = 0; q < port->ntxqs; q++) 2047 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) 2048 *pstats++ += mvpp2_read_index(port->priv, 2049 MVPP22_CTRS_TX_CTR(port->id, q), 2050 mvpp2_ethtool_txq_regs[i].offset); 2051 2052 /* Rxqs are numbered from 0 from the user standpoint, but not from the 2053 * driver's. We need to add the port->first_rxq offset. 2054 */ 2055 for (q = 0; q < port->nrxqs; q++) 2056 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) 2057 *pstats++ += mvpp2_read_index(port->priv, 2058 port->first_rxq + q, 2059 mvpp2_ethtool_rxq_regs[i].offset); 2060 2061 /* Gather XDP Statistics */ 2062 mvpp2_get_xdp_stats(port, &xdp_stats); 2063 2064 for (i = 0, s = mvpp2_ethtool_xdp; 2065 s < mvpp2_ethtool_xdp + ARRAY_SIZE(mvpp2_ethtool_xdp); 2066 s++, i++) { 2067 switch (s->offset) { 2068 case ETHTOOL_XDP_REDIRECT: 2069 *pstats++ = xdp_stats.xdp_redirect; 2070 break; 2071 case ETHTOOL_XDP_PASS: 2072 *pstats++ = xdp_stats.xdp_pass; 2073 break; 2074 case ETHTOOL_XDP_DROP: 2075 *pstats++ = xdp_stats.xdp_drop; 2076 break; 2077 case ETHTOOL_XDP_TX: 2078 *pstats++ = xdp_stats.xdp_tx; 2079 break; 2080 case ETHTOOL_XDP_TX_ERR: 2081 *pstats++ = xdp_stats.xdp_tx_err; 2082 break; 2083 case ETHTOOL_XDP_XMIT: 2084 *pstats++ = xdp_stats.xdp_xmit; 2085 break; 2086 case ETHTOOL_XDP_XMIT_ERR: 2087 *pstats++ = xdp_stats.xdp_xmit_err; 2088 break; 2089 } 2090 } 2091 } 2092 2093 static void mvpp2_gather_hw_statistics(struct work_struct *work) 2094 { 2095 struct delayed_work *del_work = to_delayed_work(work); 2096 struct mvpp2_port *port = container_of(del_work, struct mvpp2_port, 2097 stats_work); 2098 2099 mutex_lock(&port->gather_stats_lock); 2100 2101 mvpp2_read_stats(port); 2102 2103 /* No need to read again the counters right after this function if it 2104 * was called asynchronously by the user (ie. use of ethtool). 2105 */ 2106 cancel_delayed_work(&port->stats_work); 2107 queue_delayed_work(port->priv->stats_queue, &port->stats_work, 2108 MVPP2_MIB_COUNTERS_STATS_DELAY); 2109 2110 mutex_unlock(&port->gather_stats_lock); 2111 } 2112 2113 static void mvpp2_ethtool_get_stats(struct net_device *dev, 2114 struct ethtool_stats *stats, u64 *data) 2115 { 2116 struct mvpp2_port *port = netdev_priv(dev); 2117 2118 /* Update statistics for the given port, then take the lock to avoid 2119 * concurrent accesses on the ethtool_stats structure during its copy. 2120 */ 2121 mvpp2_gather_hw_statistics(&port->stats_work.work); 2122 2123 mutex_lock(&port->gather_stats_lock); 2124 memcpy(data, port->ethtool_stats, 2125 sizeof(u64) * MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs)); 2126 mutex_unlock(&port->gather_stats_lock); 2127 } 2128 2129 static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset) 2130 { 2131 struct mvpp2_port *port = netdev_priv(dev); 2132 2133 if (sset == ETH_SS_STATS) 2134 return MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs); 2135 2136 return -EOPNOTSUPP; 2137 } 2138 2139 static void mvpp2_mac_reset_assert(struct mvpp2_port *port) 2140 { 2141 u32 val; 2142 2143 val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) | 2144 MVPP2_GMAC_PORT_RESET_MASK; 2145 writel(val, port->base + MVPP2_GMAC_CTRL_2_REG); 2146 2147 if (port->priv->hw_version >= MVPP22 && port->gop_id == 0) { 2148 val = readl(port->base + MVPP22_XLG_CTRL0_REG) & 2149 ~MVPP22_XLG_CTRL0_MAC_RESET_DIS; 2150 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 2151 } 2152 } 2153 2154 static void mvpp22_pcs_reset_assert(struct mvpp2_port *port) 2155 { 2156 struct mvpp2 *priv = port->priv; 2157 void __iomem *mpcs, *xpcs; 2158 u32 val; 2159 2160 if (port->priv->hw_version == MVPP21 || port->gop_id != 0) 2161 return; 2162 2163 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 2164 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 2165 2166 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 2167 val &= ~(MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX); 2168 val |= MVPP22_MPCS_CLK_RESET_DIV_SET; 2169 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 2170 2171 val = readl(xpcs + MVPP22_XPCS_CFG0); 2172 writel(val & ~MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 2173 } 2174 2175 static void mvpp22_pcs_reset_deassert(struct mvpp2_port *port) 2176 { 2177 struct mvpp2 *priv = port->priv; 2178 void __iomem *mpcs, *xpcs; 2179 u32 val; 2180 2181 if (port->priv->hw_version == MVPP21 || port->gop_id != 0) 2182 return; 2183 2184 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 2185 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 2186 2187 switch (port->phy_interface) { 2188 case PHY_INTERFACE_MODE_10GBASER: 2189 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 2190 val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | 2191 MAC_CLK_RESET_SD_TX; 2192 val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET; 2193 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 2194 break; 2195 case PHY_INTERFACE_MODE_XAUI: 2196 case PHY_INTERFACE_MODE_RXAUI: 2197 val = readl(xpcs + MVPP22_XPCS_CFG0); 2198 writel(val | MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 2199 break; 2200 default: 2201 break; 2202 } 2203 } 2204 2205 /* Change maximum receive size of the port */ 2206 static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port) 2207 { 2208 u32 val; 2209 2210 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 2211 val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK; 2212 val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) << 2213 MVPP2_GMAC_MAX_RX_SIZE_OFFS); 2214 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 2215 } 2216 2217 /* Change maximum receive size of the port */ 2218 static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port) 2219 { 2220 u32 val; 2221 2222 val = readl(port->base + MVPP22_XLG_CTRL1_REG); 2223 val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK; 2224 val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) << 2225 MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS; 2226 writel(val, port->base + MVPP22_XLG_CTRL1_REG); 2227 } 2228 2229 /* Set defaults to the MVPP2 port */ 2230 static void mvpp2_defaults_set(struct mvpp2_port *port) 2231 { 2232 int tx_port_num, val, queue, lrxq; 2233 2234 if (port->priv->hw_version == MVPP21) { 2235 /* Update TX FIFO MIN Threshold */ 2236 val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 2237 val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK; 2238 /* Min. TX threshold must be less than minimal packet length */ 2239 val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2); 2240 writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 2241 } 2242 2243 /* Disable Legacy WRR, Disable EJP, Release from reset */ 2244 tx_port_num = mvpp2_egress_port(port); 2245 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, 2246 tx_port_num); 2247 mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0); 2248 2249 /* Set TXQ scheduling to Round-Robin */ 2250 mvpp2_write(port->priv, MVPP2_TXP_SCHED_FIXED_PRIO_REG, 0); 2251 2252 /* Close bandwidth for all queues */ 2253 for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) 2254 mvpp2_write(port->priv, 2255 MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(queue), 0); 2256 2257 /* Set refill period to 1 usec, refill tokens 2258 * and bucket size to maximum 2259 */ 2260 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG, 2261 port->priv->tclk / USEC_PER_SEC); 2262 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG); 2263 val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK; 2264 val |= MVPP2_TXP_REFILL_PERIOD_MASK(1); 2265 val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK; 2266 mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val); 2267 val = MVPP2_TXP_TOKEN_SIZE_MAX; 2268 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 2269 2270 /* Set MaximumLowLatencyPacketSize value to 256 */ 2271 mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id), 2272 MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK | 2273 MVPP2_RX_LOW_LATENCY_PKT_SIZE(256)); 2274 2275 /* Enable Rx cache snoop */ 2276 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2277 queue = port->rxqs[lrxq]->id; 2278 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2279 val |= MVPP2_SNOOP_PKT_SIZE_MASK | 2280 MVPP2_SNOOP_BUF_HDR_MASK; 2281 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2282 } 2283 2284 /* At default, mask all interrupts to all present cpus */ 2285 mvpp2_interrupts_disable(port); 2286 } 2287 2288 /* Enable/disable receiving packets */ 2289 static void mvpp2_ingress_enable(struct mvpp2_port *port) 2290 { 2291 u32 val; 2292 int lrxq, queue; 2293 2294 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2295 queue = port->rxqs[lrxq]->id; 2296 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2297 val &= ~MVPP2_RXQ_DISABLE_MASK; 2298 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2299 } 2300 } 2301 2302 static void mvpp2_ingress_disable(struct mvpp2_port *port) 2303 { 2304 u32 val; 2305 int lrxq, queue; 2306 2307 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2308 queue = port->rxqs[lrxq]->id; 2309 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2310 val |= MVPP2_RXQ_DISABLE_MASK; 2311 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2312 } 2313 } 2314 2315 /* Enable transmit via physical egress queue 2316 * - HW starts take descriptors from DRAM 2317 */ 2318 static void mvpp2_egress_enable(struct mvpp2_port *port) 2319 { 2320 u32 qmap; 2321 int queue; 2322 int tx_port_num = mvpp2_egress_port(port); 2323 2324 /* Enable all initialized TXs. */ 2325 qmap = 0; 2326 for (queue = 0; queue < port->ntxqs; queue++) { 2327 struct mvpp2_tx_queue *txq = port->txqs[queue]; 2328 2329 if (txq->descs) 2330 qmap |= (1 << queue); 2331 } 2332 2333 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2334 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap); 2335 } 2336 2337 /* Disable transmit via physical egress queue 2338 * - HW doesn't take descriptors from DRAM 2339 */ 2340 static void mvpp2_egress_disable(struct mvpp2_port *port) 2341 { 2342 u32 reg_data; 2343 int delay; 2344 int tx_port_num = mvpp2_egress_port(port); 2345 2346 /* Issue stop command for active channels only */ 2347 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2348 reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) & 2349 MVPP2_TXP_SCHED_ENQ_MASK; 2350 if (reg_data != 0) 2351 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, 2352 (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET)); 2353 2354 /* Wait for all Tx activity to terminate. */ 2355 delay = 0; 2356 do { 2357 if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) { 2358 netdev_warn(port->dev, 2359 "Tx stop timed out, status=0x%08x\n", 2360 reg_data); 2361 break; 2362 } 2363 mdelay(1); 2364 delay++; 2365 2366 /* Check port TX Command register that all 2367 * Tx queues are stopped 2368 */ 2369 reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG); 2370 } while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK); 2371 } 2372 2373 /* Rx descriptors helper methods */ 2374 2375 /* Get number of Rx descriptors occupied by received packets */ 2376 static inline int 2377 mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id) 2378 { 2379 u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id)); 2380 2381 return val & MVPP2_RXQ_OCCUPIED_MASK; 2382 } 2383 2384 /* Update Rx queue status with the number of occupied and available 2385 * Rx descriptor slots. 2386 */ 2387 static inline void 2388 mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id, 2389 int used_count, int free_count) 2390 { 2391 /* Decrement the number of used descriptors and increment count 2392 * increment the number of free descriptors. 2393 */ 2394 u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET); 2395 2396 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val); 2397 } 2398 2399 /* Get pointer to next RX descriptor to be processed by SW */ 2400 static inline struct mvpp2_rx_desc * 2401 mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq) 2402 { 2403 int rx_desc = rxq->next_desc_to_proc; 2404 2405 rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc); 2406 prefetch(rxq->descs + rxq->next_desc_to_proc); 2407 return rxq->descs + rx_desc; 2408 } 2409 2410 /* Set rx queue offset */ 2411 static void mvpp2_rxq_offset_set(struct mvpp2_port *port, 2412 int prxq, int offset) 2413 { 2414 u32 val; 2415 2416 /* Convert offset from bytes to units of 32 bytes */ 2417 offset = offset >> 5; 2418 2419 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 2420 val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK; 2421 2422 /* Offset is in */ 2423 val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) & 2424 MVPP2_RXQ_PACKET_OFFSET_MASK); 2425 2426 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 2427 } 2428 2429 /* Tx descriptors helper methods */ 2430 2431 /* Get pointer to next Tx descriptor to be processed (send) by HW */ 2432 static struct mvpp2_tx_desc * 2433 mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq) 2434 { 2435 int tx_desc = txq->next_desc_to_proc; 2436 2437 txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc); 2438 return txq->descs + tx_desc; 2439 } 2440 2441 /* Update HW with number of aggregated Tx descriptors to be sent 2442 * 2443 * Called only from mvpp2_tx(), so migration is disabled, using 2444 * smp_processor_id() is OK. 2445 */ 2446 static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending) 2447 { 2448 /* aggregated access - relevant TXQ number is written in TX desc */ 2449 mvpp2_thread_write(port->priv, 2450 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2451 MVPP2_AGGR_TXQ_UPDATE_REG, pending); 2452 } 2453 2454 /* Check if there are enough free descriptors in aggregated txq. 2455 * If not, update the number of occupied descriptors and repeat the check. 2456 * 2457 * Called only from mvpp2_tx(), so migration is disabled, using 2458 * smp_processor_id() is OK. 2459 */ 2460 static int mvpp2_aggr_desc_num_check(struct mvpp2_port *port, 2461 struct mvpp2_tx_queue *aggr_txq, int num) 2462 { 2463 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) { 2464 /* Update number of occupied aggregated Tx descriptors */ 2465 unsigned int thread = 2466 mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2467 u32 val = mvpp2_read_relaxed(port->priv, 2468 MVPP2_AGGR_TXQ_STATUS_REG(thread)); 2469 2470 aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK; 2471 2472 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) 2473 return -ENOMEM; 2474 } 2475 return 0; 2476 } 2477 2478 /* Reserved Tx descriptors allocation request 2479 * 2480 * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called 2481 * only by mvpp2_tx(), so migration is disabled, using 2482 * smp_processor_id() is OK. 2483 */ 2484 static int mvpp2_txq_alloc_reserved_desc(struct mvpp2_port *port, 2485 struct mvpp2_tx_queue *txq, int num) 2486 { 2487 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2488 struct mvpp2 *priv = port->priv; 2489 u32 val; 2490 2491 val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num; 2492 mvpp2_thread_write_relaxed(priv, thread, MVPP2_TXQ_RSVD_REQ_REG, val); 2493 2494 val = mvpp2_thread_read_relaxed(priv, thread, MVPP2_TXQ_RSVD_RSLT_REG); 2495 2496 return val & MVPP2_TXQ_RSVD_RSLT_MASK; 2497 } 2498 2499 /* Check if there are enough reserved descriptors for transmission. 2500 * If not, request chunk of reserved descriptors and check again. 2501 */ 2502 static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2_port *port, 2503 struct mvpp2_tx_queue *txq, 2504 struct mvpp2_txq_pcpu *txq_pcpu, 2505 int num) 2506 { 2507 int req, desc_count; 2508 unsigned int thread; 2509 2510 if (txq_pcpu->reserved_num >= num) 2511 return 0; 2512 2513 /* Not enough descriptors reserved! Update the reserved descriptor 2514 * count and check again. 2515 */ 2516 2517 desc_count = 0; 2518 /* Compute total of used descriptors */ 2519 for (thread = 0; thread < port->priv->nthreads; thread++) { 2520 struct mvpp2_txq_pcpu *txq_pcpu_aux; 2521 2522 txq_pcpu_aux = per_cpu_ptr(txq->pcpu, thread); 2523 desc_count += txq_pcpu_aux->count; 2524 desc_count += txq_pcpu_aux->reserved_num; 2525 } 2526 2527 req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num); 2528 desc_count += req; 2529 2530 if (desc_count > 2531 (txq->size - (MVPP2_MAX_THREADS * MVPP2_CPU_DESC_CHUNK))) 2532 return -ENOMEM; 2533 2534 txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(port, txq, req); 2535 2536 /* OK, the descriptor could have been updated: check again. */ 2537 if (txq_pcpu->reserved_num < num) 2538 return -ENOMEM; 2539 return 0; 2540 } 2541 2542 /* Release the last allocated Tx descriptor. Useful to handle DMA 2543 * mapping failures in the Tx path. 2544 */ 2545 static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq) 2546 { 2547 if (txq->next_desc_to_proc == 0) 2548 txq->next_desc_to_proc = txq->last_desc - 1; 2549 else 2550 txq->next_desc_to_proc--; 2551 } 2552 2553 /* Set Tx descriptors fields relevant for CSUM calculation */ 2554 static u32 mvpp2_txq_desc_csum(int l3_offs, __be16 l3_proto, 2555 int ip_hdr_len, int l4_proto) 2556 { 2557 u32 command; 2558 2559 /* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, 2560 * G_L4_chk, L4_type required only for checksum calculation 2561 */ 2562 command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT); 2563 command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT); 2564 command |= MVPP2_TXD_IP_CSUM_DISABLE; 2565 2566 if (l3_proto == htons(ETH_P_IP)) { 2567 command &= ~MVPP2_TXD_IP_CSUM_DISABLE; /* enable IPv4 csum */ 2568 command &= ~MVPP2_TXD_L3_IP6; /* enable IPv4 */ 2569 } else { 2570 command |= MVPP2_TXD_L3_IP6; /* enable IPv6 */ 2571 } 2572 2573 if (l4_proto == IPPROTO_TCP) { 2574 command &= ~MVPP2_TXD_L4_UDP; /* enable TCP */ 2575 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2576 } else if (l4_proto == IPPROTO_UDP) { 2577 command |= MVPP2_TXD_L4_UDP; /* enable UDP */ 2578 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2579 } else { 2580 command |= MVPP2_TXD_L4_CSUM_NOT; 2581 } 2582 2583 return command; 2584 } 2585 2586 /* Get number of sent descriptors and decrement counter. 2587 * The number of sent descriptors is returned. 2588 * Per-thread access 2589 * 2590 * Called only from mvpp2_txq_done(), called from mvpp2_tx() 2591 * (migration disabled) and from the TX completion tasklet (migration 2592 * disabled) so using smp_processor_id() is OK. 2593 */ 2594 static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port, 2595 struct mvpp2_tx_queue *txq) 2596 { 2597 u32 val; 2598 2599 /* Reading status reg resets transmitted descriptor counter */ 2600 val = mvpp2_thread_read_relaxed(port->priv, 2601 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2602 MVPP2_TXQ_SENT_REG(txq->id)); 2603 2604 return (val & MVPP2_TRANSMITTED_COUNT_MASK) >> 2605 MVPP2_TRANSMITTED_COUNT_OFFSET; 2606 } 2607 2608 /* Called through on_each_cpu(), so runs on all CPUs, with migration 2609 * disabled, therefore using smp_processor_id() is OK. 2610 */ 2611 static void mvpp2_txq_sent_counter_clear(void *arg) 2612 { 2613 struct mvpp2_port *port = arg; 2614 int queue; 2615 2616 /* If the thread isn't used, don't do anything */ 2617 if (smp_processor_id() >= port->priv->nthreads) 2618 return; 2619 2620 for (queue = 0; queue < port->ntxqs; queue++) { 2621 int id = port->txqs[queue]->id; 2622 2623 mvpp2_thread_read(port->priv, 2624 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2625 MVPP2_TXQ_SENT_REG(id)); 2626 } 2627 } 2628 2629 /* Set max sizes for Tx queues */ 2630 static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port) 2631 { 2632 u32 val, size, mtu; 2633 int txq, tx_port_num; 2634 2635 mtu = port->pkt_size * 8; 2636 if (mtu > MVPP2_TXP_MTU_MAX) 2637 mtu = MVPP2_TXP_MTU_MAX; 2638 2639 /* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */ 2640 mtu = 3 * mtu; 2641 2642 /* Indirect access to registers */ 2643 tx_port_num = mvpp2_egress_port(port); 2644 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2645 2646 /* Set MTU */ 2647 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG); 2648 val &= ~MVPP2_TXP_MTU_MAX; 2649 val |= mtu; 2650 mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val); 2651 2652 /* TXP token size and all TXQs token size must be larger that MTU */ 2653 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG); 2654 size = val & MVPP2_TXP_TOKEN_SIZE_MAX; 2655 if (size < mtu) { 2656 size = mtu; 2657 val &= ~MVPP2_TXP_TOKEN_SIZE_MAX; 2658 val |= size; 2659 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 2660 } 2661 2662 for (txq = 0; txq < port->ntxqs; txq++) { 2663 val = mvpp2_read(port->priv, 2664 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq)); 2665 size = val & MVPP2_TXQ_TOKEN_SIZE_MAX; 2666 2667 if (size < mtu) { 2668 size = mtu; 2669 val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX; 2670 val |= size; 2671 mvpp2_write(port->priv, 2672 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq), 2673 val); 2674 } 2675 } 2676 } 2677 2678 /* Set the number of non-occupied descriptors threshold */ 2679 static void mvpp2_set_rxq_free_tresh(struct mvpp2_port *port, 2680 struct mvpp2_rx_queue *rxq) 2681 { 2682 u32 val; 2683 2684 mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id); 2685 2686 val = mvpp2_read(port->priv, MVPP2_RXQ_THRESH_REG); 2687 val &= ~MVPP2_RXQ_NON_OCCUPIED_MASK; 2688 val |= MSS_THRESHOLD_STOP << MVPP2_RXQ_NON_OCCUPIED_OFFSET; 2689 mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val); 2690 } 2691 2692 /* Set the number of packets that will be received before Rx interrupt 2693 * will be generated by HW. 2694 */ 2695 static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port, 2696 struct mvpp2_rx_queue *rxq) 2697 { 2698 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2699 2700 if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK) 2701 rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK; 2702 2703 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2704 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_THRESH_REG, 2705 rxq->pkts_coal); 2706 2707 put_cpu(); 2708 } 2709 2710 /* For some reason in the LSP this is done on each CPU. Why ? */ 2711 static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port, 2712 struct mvpp2_tx_queue *txq) 2713 { 2714 unsigned int thread; 2715 u32 val; 2716 2717 if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK) 2718 txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK; 2719 2720 val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET); 2721 /* PKT-coalescing registers are per-queue + per-thread */ 2722 for (thread = 0; thread < MVPP2_MAX_THREADS; thread++) { 2723 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2724 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val); 2725 } 2726 } 2727 2728 static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz) 2729 { 2730 u64 tmp = (u64)clk_hz * usec; 2731 2732 do_div(tmp, USEC_PER_SEC); 2733 2734 return tmp > U32_MAX ? U32_MAX : tmp; 2735 } 2736 2737 static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz) 2738 { 2739 u64 tmp = (u64)cycles * USEC_PER_SEC; 2740 2741 do_div(tmp, clk_hz); 2742 2743 return tmp > U32_MAX ? U32_MAX : tmp; 2744 } 2745 2746 /* Set the time delay in usec before Rx interrupt */ 2747 static void mvpp2_rx_time_coal_set(struct mvpp2_port *port, 2748 struct mvpp2_rx_queue *rxq) 2749 { 2750 unsigned long freq = port->priv->tclk; 2751 u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2752 2753 if (val > MVPP2_MAX_ISR_RX_THRESHOLD) { 2754 rxq->time_coal = 2755 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq); 2756 2757 /* re-evaluate to get actual register value */ 2758 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2759 } 2760 2761 mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val); 2762 } 2763 2764 static void mvpp2_tx_time_coal_set(struct mvpp2_port *port) 2765 { 2766 unsigned long freq = port->priv->tclk; 2767 u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2768 2769 if (val > MVPP2_MAX_ISR_TX_THRESHOLD) { 2770 port->tx_time_coal = 2771 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq); 2772 2773 /* re-evaluate to get actual register value */ 2774 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2775 } 2776 2777 mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), val); 2778 } 2779 2780 /* Free Tx queue skbuffs */ 2781 static void mvpp2_txq_bufs_free(struct mvpp2_port *port, 2782 struct mvpp2_tx_queue *txq, 2783 struct mvpp2_txq_pcpu *txq_pcpu, int num) 2784 { 2785 struct xdp_frame_bulk bq; 2786 int i; 2787 2788 xdp_frame_bulk_init(&bq); 2789 2790 rcu_read_lock(); /* need for xdp_return_frame_bulk */ 2791 2792 for (i = 0; i < num; i++) { 2793 struct mvpp2_txq_pcpu_buf *tx_buf = 2794 txq_pcpu->buffs + txq_pcpu->txq_get_index; 2795 2796 if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma) && 2797 tx_buf->type != MVPP2_TYPE_XDP_TX) 2798 dma_unmap_single(port->dev->dev.parent, tx_buf->dma, 2799 tx_buf->size, DMA_TO_DEVICE); 2800 if (tx_buf->type == MVPP2_TYPE_SKB && tx_buf->skb) 2801 dev_kfree_skb_any(tx_buf->skb); 2802 else if (tx_buf->type == MVPP2_TYPE_XDP_TX || 2803 tx_buf->type == MVPP2_TYPE_XDP_NDO) 2804 xdp_return_frame_bulk(tx_buf->xdpf, &bq); 2805 2806 mvpp2_txq_inc_get(txq_pcpu); 2807 } 2808 xdp_flush_frame_bulk(&bq); 2809 2810 rcu_read_unlock(); 2811 } 2812 2813 static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port, 2814 u32 cause) 2815 { 2816 int queue = fls(cause) - 1; 2817 2818 return port->rxqs[queue]; 2819 } 2820 2821 static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port, 2822 u32 cause) 2823 { 2824 int queue = fls(cause) - 1; 2825 2826 return port->txqs[queue]; 2827 } 2828 2829 /* Handle end of transmission */ 2830 static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 2831 struct mvpp2_txq_pcpu *txq_pcpu) 2832 { 2833 struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id); 2834 int tx_done; 2835 2836 if (txq_pcpu->thread != mvpp2_cpu_to_thread(port->priv, smp_processor_id())) 2837 netdev_err(port->dev, "wrong cpu on the end of Tx processing\n"); 2838 2839 tx_done = mvpp2_txq_sent_desc_proc(port, txq); 2840 if (!tx_done) 2841 return; 2842 mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done); 2843 2844 txq_pcpu->count -= tx_done; 2845 2846 if (netif_tx_queue_stopped(nq)) 2847 if (txq_pcpu->count <= txq_pcpu->wake_threshold) 2848 netif_tx_wake_queue(nq); 2849 } 2850 2851 static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause, 2852 unsigned int thread) 2853 { 2854 struct mvpp2_tx_queue *txq; 2855 struct mvpp2_txq_pcpu *txq_pcpu; 2856 unsigned int tx_todo = 0; 2857 2858 while (cause) { 2859 txq = mvpp2_get_tx_queue(port, cause); 2860 if (!txq) 2861 break; 2862 2863 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2864 2865 if (txq_pcpu->count) { 2866 mvpp2_txq_done(port, txq, txq_pcpu); 2867 tx_todo += txq_pcpu->count; 2868 } 2869 2870 cause &= ~(1 << txq->log_id); 2871 } 2872 return tx_todo; 2873 } 2874 2875 /* Rx/Tx queue initialization/cleanup methods */ 2876 2877 /* Allocate and initialize descriptors for aggr TXQ */ 2878 static int mvpp2_aggr_txq_init(struct platform_device *pdev, 2879 struct mvpp2_tx_queue *aggr_txq, 2880 unsigned int thread, struct mvpp2 *priv) 2881 { 2882 u32 txq_dma; 2883 2884 /* Allocate memory for TX descriptors */ 2885 aggr_txq->descs = dma_alloc_coherent(&pdev->dev, 2886 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 2887 &aggr_txq->descs_dma, GFP_KERNEL); 2888 if (!aggr_txq->descs) 2889 return -ENOMEM; 2890 2891 aggr_txq->last_desc = MVPP2_AGGR_TXQ_SIZE - 1; 2892 2893 /* Aggr TXQ no reset WA */ 2894 aggr_txq->next_desc_to_proc = mvpp2_read(priv, 2895 MVPP2_AGGR_TXQ_INDEX_REG(thread)); 2896 2897 /* Set Tx descriptors queue starting address indirect 2898 * access 2899 */ 2900 if (priv->hw_version == MVPP21) 2901 txq_dma = aggr_txq->descs_dma; 2902 else 2903 txq_dma = aggr_txq->descs_dma >> 2904 MVPP22_AGGR_TXQ_DESC_ADDR_OFFS; 2905 2906 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(thread), txq_dma); 2907 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(thread), 2908 MVPP2_AGGR_TXQ_SIZE); 2909 2910 return 0; 2911 } 2912 2913 /* Create a specified Rx queue */ 2914 static int mvpp2_rxq_init(struct mvpp2_port *port, 2915 struct mvpp2_rx_queue *rxq) 2916 { 2917 struct mvpp2 *priv = port->priv; 2918 unsigned int thread; 2919 u32 rxq_dma; 2920 int err; 2921 2922 rxq->size = port->rx_ring_size; 2923 2924 /* Allocate memory for RX descriptors */ 2925 rxq->descs = dma_alloc_coherent(port->dev->dev.parent, 2926 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2927 &rxq->descs_dma, GFP_KERNEL); 2928 if (!rxq->descs) 2929 return -ENOMEM; 2930 2931 rxq->last_desc = rxq->size - 1; 2932 2933 /* Zero occupied and non-occupied counters - direct access */ 2934 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2935 2936 /* Set Rx descriptors queue starting address - indirect access */ 2937 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2938 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2939 if (port->priv->hw_version == MVPP21) 2940 rxq_dma = rxq->descs_dma; 2941 else 2942 rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS; 2943 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma); 2944 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, rxq->size); 2945 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_INDEX_REG, 0); 2946 put_cpu(); 2947 2948 /* Set Offset */ 2949 mvpp2_rxq_offset_set(port, rxq->id, MVPP2_SKB_HEADROOM); 2950 2951 /* Set coalescing pkts and time */ 2952 mvpp2_rx_pkts_coal_set(port, rxq); 2953 mvpp2_rx_time_coal_set(port, rxq); 2954 2955 /* Set the number of non occupied descriptors threshold */ 2956 mvpp2_set_rxq_free_tresh(port, rxq); 2957 2958 /* Add number of descriptors ready for receiving packets */ 2959 mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size); 2960 2961 if (priv->percpu_pools) { 2962 err = xdp_rxq_info_reg(&rxq->xdp_rxq_short, port->dev, rxq->id, 0); 2963 if (err < 0) 2964 goto err_free_dma; 2965 2966 err = xdp_rxq_info_reg(&rxq->xdp_rxq_long, port->dev, rxq->id, 0); 2967 if (err < 0) 2968 goto err_unregister_rxq_short; 2969 2970 /* Every RXQ has a pool for short and another for long packets */ 2971 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_short, 2972 MEM_TYPE_PAGE_POOL, 2973 priv->page_pool[rxq->logic_rxq]); 2974 if (err < 0) 2975 goto err_unregister_rxq_long; 2976 2977 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_long, 2978 MEM_TYPE_PAGE_POOL, 2979 priv->page_pool[rxq->logic_rxq + 2980 port->nrxqs]); 2981 if (err < 0) 2982 goto err_unregister_mem_rxq_short; 2983 } 2984 2985 return 0; 2986 2987 err_unregister_mem_rxq_short: 2988 xdp_rxq_info_unreg_mem_model(&rxq->xdp_rxq_short); 2989 err_unregister_rxq_long: 2990 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 2991 err_unregister_rxq_short: 2992 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 2993 err_free_dma: 2994 dma_free_coherent(port->dev->dev.parent, 2995 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2996 rxq->descs, rxq->descs_dma); 2997 return err; 2998 } 2999 3000 /* Push packets received by the RXQ to BM pool */ 3001 static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port, 3002 struct mvpp2_rx_queue *rxq) 3003 { 3004 int rx_received, i; 3005 3006 rx_received = mvpp2_rxq_received(port, rxq->id); 3007 if (!rx_received) 3008 return; 3009 3010 for (i = 0; i < rx_received; i++) { 3011 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 3012 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 3013 int pool; 3014 3015 pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >> 3016 MVPP2_RXD_BM_POOL_ID_OFFS; 3017 3018 mvpp2_bm_pool_put(port, pool, 3019 mvpp2_rxdesc_dma_addr_get(port, rx_desc), 3020 mvpp2_rxdesc_cookie_get(port, rx_desc)); 3021 } 3022 mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received); 3023 } 3024 3025 /* Cleanup Rx queue */ 3026 static void mvpp2_rxq_deinit(struct mvpp2_port *port, 3027 struct mvpp2_rx_queue *rxq) 3028 { 3029 unsigned int thread; 3030 3031 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_short)) 3032 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 3033 3034 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_long)) 3035 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 3036 3037 mvpp2_rxq_drop_pkts(port, rxq); 3038 3039 if (rxq->descs) 3040 dma_free_coherent(port->dev->dev.parent, 3041 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 3042 rxq->descs, 3043 rxq->descs_dma); 3044 3045 rxq->descs = NULL; 3046 rxq->last_desc = 0; 3047 rxq->next_desc_to_proc = 0; 3048 rxq->descs_dma = 0; 3049 3050 /* Clear Rx descriptors queue starting address and size; 3051 * free descriptor number 3052 */ 3053 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 3054 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3055 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 3056 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, 0); 3057 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, 0); 3058 put_cpu(); 3059 } 3060 3061 /* Create and initialize a Tx queue */ 3062 static int mvpp2_txq_init(struct mvpp2_port *port, 3063 struct mvpp2_tx_queue *txq) 3064 { 3065 u32 val; 3066 unsigned int thread; 3067 int desc, desc_per_txq, tx_port_num; 3068 struct mvpp2_txq_pcpu *txq_pcpu; 3069 3070 txq->size = port->tx_ring_size; 3071 3072 /* Allocate memory for Tx descriptors */ 3073 txq->descs = dma_alloc_coherent(port->dev->dev.parent, 3074 txq->size * MVPP2_DESC_ALIGNED_SIZE, 3075 &txq->descs_dma, GFP_KERNEL); 3076 if (!txq->descs) 3077 return -ENOMEM; 3078 3079 txq->last_desc = txq->size - 1; 3080 3081 /* Set Tx descriptors queue starting address - indirect access */ 3082 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3083 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3084 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 3085 txq->descs_dma); 3086 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 3087 txq->size & MVPP2_TXQ_DESC_SIZE_MASK); 3088 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_INDEX_REG, 0); 3089 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_RSVD_CLR_REG, 3090 txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET); 3091 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PENDING_REG); 3092 val &= ~MVPP2_TXQ_PENDING_MASK; 3093 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PENDING_REG, val); 3094 3095 /* Calculate base address in prefetch buffer. We reserve 16 descriptors 3096 * for each existing TXQ. 3097 * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT 3098 * GBE ports assumed to be continuous from 0 to MVPP2_MAX_PORTS 3099 */ 3100 desc_per_txq = 16; 3101 desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) + 3102 (txq->log_id * desc_per_txq); 3103 3104 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, 3105 MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 | 3106 MVPP2_PREF_BUF_THRESH(desc_per_txq / 2)); 3107 put_cpu(); 3108 3109 /* WRR / EJP configuration - indirect access */ 3110 tx_port_num = mvpp2_egress_port(port); 3111 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 3112 3113 val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id)); 3114 val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK; 3115 val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1); 3116 val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK; 3117 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val); 3118 3119 val = MVPP2_TXQ_TOKEN_SIZE_MAX; 3120 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id), 3121 val); 3122 3123 for (thread = 0; thread < port->priv->nthreads; thread++) { 3124 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3125 txq_pcpu->size = txq->size; 3126 txq_pcpu->buffs = kmalloc_array(txq_pcpu->size, 3127 sizeof(*txq_pcpu->buffs), 3128 GFP_KERNEL); 3129 if (!txq_pcpu->buffs) 3130 return -ENOMEM; 3131 3132 txq_pcpu->count = 0; 3133 txq_pcpu->reserved_num = 0; 3134 txq_pcpu->txq_put_index = 0; 3135 txq_pcpu->txq_get_index = 0; 3136 txq_pcpu->tso_headers = NULL; 3137 3138 txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS; 3139 txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2; 3140 3141 txq_pcpu->tso_headers = 3142 dma_alloc_coherent(port->dev->dev.parent, 3143 txq_pcpu->size * TSO_HEADER_SIZE, 3144 &txq_pcpu->tso_headers_dma, 3145 GFP_KERNEL); 3146 if (!txq_pcpu->tso_headers) 3147 return -ENOMEM; 3148 } 3149 3150 return 0; 3151 } 3152 3153 /* Free allocated TXQ resources */ 3154 static void mvpp2_txq_deinit(struct mvpp2_port *port, 3155 struct mvpp2_tx_queue *txq) 3156 { 3157 struct mvpp2_txq_pcpu *txq_pcpu; 3158 unsigned int thread; 3159 3160 for (thread = 0; thread < port->priv->nthreads; thread++) { 3161 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3162 kfree(txq_pcpu->buffs); 3163 3164 if (txq_pcpu->tso_headers) 3165 dma_free_coherent(port->dev->dev.parent, 3166 txq_pcpu->size * TSO_HEADER_SIZE, 3167 txq_pcpu->tso_headers, 3168 txq_pcpu->tso_headers_dma); 3169 3170 txq_pcpu->tso_headers = NULL; 3171 } 3172 3173 if (txq->descs) 3174 dma_free_coherent(port->dev->dev.parent, 3175 txq->size * MVPP2_DESC_ALIGNED_SIZE, 3176 txq->descs, txq->descs_dma); 3177 3178 txq->descs = NULL; 3179 txq->last_desc = 0; 3180 txq->next_desc_to_proc = 0; 3181 txq->descs_dma = 0; 3182 3183 /* Set minimum bandwidth for disabled TXQs */ 3184 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->log_id), 0); 3185 3186 /* Set Tx descriptors queue starting address and size */ 3187 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3188 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3189 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 0); 3190 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 0); 3191 put_cpu(); 3192 } 3193 3194 /* Cleanup Tx ports */ 3195 static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq) 3196 { 3197 struct mvpp2_txq_pcpu *txq_pcpu; 3198 int delay, pending; 3199 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3200 u32 val; 3201 3202 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3203 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG); 3204 val |= MVPP2_TXQ_DRAIN_EN_MASK; 3205 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 3206 3207 /* The napi queue has been stopped so wait for all packets 3208 * to be transmitted. 3209 */ 3210 delay = 0; 3211 do { 3212 if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) { 3213 netdev_warn(port->dev, 3214 "port %d: cleaning queue %d timed out\n", 3215 port->id, txq->log_id); 3216 break; 3217 } 3218 mdelay(1); 3219 delay++; 3220 3221 pending = mvpp2_thread_read(port->priv, thread, 3222 MVPP2_TXQ_PENDING_REG); 3223 pending &= MVPP2_TXQ_PENDING_MASK; 3224 } while (pending); 3225 3226 val &= ~MVPP2_TXQ_DRAIN_EN_MASK; 3227 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 3228 put_cpu(); 3229 3230 for (thread = 0; thread < port->priv->nthreads; thread++) { 3231 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3232 3233 /* Release all packets */ 3234 mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count); 3235 3236 /* Reset queue */ 3237 txq_pcpu->count = 0; 3238 txq_pcpu->txq_put_index = 0; 3239 txq_pcpu->txq_get_index = 0; 3240 } 3241 } 3242 3243 /* Cleanup all Tx queues */ 3244 static void mvpp2_cleanup_txqs(struct mvpp2_port *port) 3245 { 3246 struct mvpp2_tx_queue *txq; 3247 int queue; 3248 u32 val; 3249 3250 val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG); 3251 3252 /* Reset Tx ports and delete Tx queues */ 3253 val |= MVPP2_TX_PORT_FLUSH_MASK(port->id); 3254 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 3255 3256 for (queue = 0; queue < port->ntxqs; queue++) { 3257 txq = port->txqs[queue]; 3258 mvpp2_txq_clean(port, txq); 3259 mvpp2_txq_deinit(port, txq); 3260 } 3261 3262 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 3263 3264 val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id); 3265 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 3266 } 3267 3268 /* Cleanup all Rx queues */ 3269 static void mvpp2_cleanup_rxqs(struct mvpp2_port *port) 3270 { 3271 int queue; 3272 3273 for (queue = 0; queue < port->nrxqs; queue++) 3274 mvpp2_rxq_deinit(port, port->rxqs[queue]); 3275 3276 if (port->tx_fc) 3277 mvpp2_rxq_disable_fc(port); 3278 } 3279 3280 /* Init all Rx queues for port */ 3281 static int mvpp2_setup_rxqs(struct mvpp2_port *port) 3282 { 3283 int queue, err; 3284 3285 for (queue = 0; queue < port->nrxqs; queue++) { 3286 err = mvpp2_rxq_init(port, port->rxqs[queue]); 3287 if (err) 3288 goto err_cleanup; 3289 } 3290 3291 if (port->tx_fc) 3292 mvpp2_rxq_enable_fc(port); 3293 3294 return 0; 3295 3296 err_cleanup: 3297 mvpp2_cleanup_rxqs(port); 3298 return err; 3299 } 3300 3301 /* Init all tx queues for port */ 3302 static int mvpp2_setup_txqs(struct mvpp2_port *port) 3303 { 3304 struct mvpp2_tx_queue *txq; 3305 int queue, err; 3306 3307 for (queue = 0; queue < port->ntxqs; queue++) { 3308 txq = port->txqs[queue]; 3309 err = mvpp2_txq_init(port, txq); 3310 if (err) 3311 goto err_cleanup; 3312 3313 /* Assign this queue to a CPU */ 3314 if (queue < num_possible_cpus()) 3315 netif_set_xps_queue(port->dev, cpumask_of(queue), queue); 3316 } 3317 3318 if (port->has_tx_irqs) { 3319 mvpp2_tx_time_coal_set(port); 3320 for (queue = 0; queue < port->ntxqs; queue++) { 3321 txq = port->txqs[queue]; 3322 mvpp2_tx_pkts_coal_set(port, txq); 3323 } 3324 } 3325 3326 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 3327 return 0; 3328 3329 err_cleanup: 3330 mvpp2_cleanup_txqs(port); 3331 return err; 3332 } 3333 3334 /* The callback for per-port interrupt */ 3335 static irqreturn_t mvpp2_isr(int irq, void *dev_id) 3336 { 3337 struct mvpp2_queue_vector *qv = dev_id; 3338 3339 mvpp2_qvec_interrupt_disable(qv); 3340 3341 napi_schedule(&qv->napi); 3342 3343 return IRQ_HANDLED; 3344 } 3345 3346 static void mvpp2_isr_handle_ptp_queue(struct mvpp2_port *port, int nq) 3347 { 3348 struct skb_shared_hwtstamps shhwtstamps; 3349 struct mvpp2_hwtstamp_queue *queue; 3350 struct sk_buff *skb; 3351 void __iomem *ptp_q; 3352 unsigned int id; 3353 u32 r0, r1, r2; 3354 3355 ptp_q = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 3356 if (nq) 3357 ptp_q += MVPP22_PTP_TX_Q1_R0 - MVPP22_PTP_TX_Q0_R0; 3358 3359 queue = &port->tx_hwtstamp_queue[nq]; 3360 3361 while (1) { 3362 r0 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R0) & 0xffff; 3363 if (!r0) 3364 break; 3365 3366 r1 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R1) & 0xffff; 3367 r2 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R2) & 0xffff; 3368 3369 id = (r0 >> 1) & 31; 3370 3371 skb = queue->skb[id]; 3372 queue->skb[id] = NULL; 3373 if (skb) { 3374 u32 ts = r2 << 19 | r1 << 3 | r0 >> 13; 3375 3376 mvpp22_tai_tstamp(port->priv->tai, ts, &shhwtstamps); 3377 skb_tstamp_tx(skb, &shhwtstamps); 3378 dev_kfree_skb_any(skb); 3379 } 3380 } 3381 } 3382 3383 static void mvpp2_isr_handle_ptp(struct mvpp2_port *port) 3384 { 3385 void __iomem *ptp; 3386 u32 val; 3387 3388 ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 3389 val = readl(ptp + MVPP22_PTP_INT_CAUSE); 3390 if (val & MVPP22_PTP_INT_CAUSE_QUEUE0) 3391 mvpp2_isr_handle_ptp_queue(port, 0); 3392 if (val & MVPP22_PTP_INT_CAUSE_QUEUE1) 3393 mvpp2_isr_handle_ptp_queue(port, 1); 3394 } 3395 3396 static void mvpp2_isr_handle_link(struct mvpp2_port *port, bool link) 3397 { 3398 struct net_device *dev = port->dev; 3399 3400 if (port->phylink) { 3401 phylink_mac_change(port->phylink, link); 3402 return; 3403 } 3404 3405 if (!netif_running(dev)) 3406 return; 3407 3408 if (link) { 3409 mvpp2_interrupts_enable(port); 3410 3411 mvpp2_egress_enable(port); 3412 mvpp2_ingress_enable(port); 3413 netif_carrier_on(dev); 3414 netif_tx_wake_all_queues(dev); 3415 } else { 3416 netif_tx_stop_all_queues(dev); 3417 netif_carrier_off(dev); 3418 mvpp2_ingress_disable(port); 3419 mvpp2_egress_disable(port); 3420 3421 mvpp2_interrupts_disable(port); 3422 } 3423 } 3424 3425 static void mvpp2_isr_handle_xlg(struct mvpp2_port *port) 3426 { 3427 bool link; 3428 u32 val; 3429 3430 val = readl(port->base + MVPP22_XLG_INT_STAT); 3431 if (val & MVPP22_XLG_INT_STAT_LINK) { 3432 val = readl(port->base + MVPP22_XLG_STATUS); 3433 link = (val & MVPP22_XLG_STATUS_LINK_UP); 3434 mvpp2_isr_handle_link(port, link); 3435 } 3436 } 3437 3438 static void mvpp2_isr_handle_gmac_internal(struct mvpp2_port *port) 3439 { 3440 bool link; 3441 u32 val; 3442 3443 if (phy_interface_mode_is_rgmii(port->phy_interface) || 3444 phy_interface_mode_is_8023z(port->phy_interface) || 3445 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 3446 val = readl(port->base + MVPP22_GMAC_INT_STAT); 3447 if (val & MVPP22_GMAC_INT_STAT_LINK) { 3448 val = readl(port->base + MVPP2_GMAC_STATUS0); 3449 link = (val & MVPP2_GMAC_STATUS0_LINK_UP); 3450 mvpp2_isr_handle_link(port, link); 3451 } 3452 } 3453 } 3454 3455 /* Per-port interrupt for link status changes */ 3456 static irqreturn_t mvpp2_port_isr(int irq, void *dev_id) 3457 { 3458 struct mvpp2_port *port = (struct mvpp2_port *)dev_id; 3459 u32 val; 3460 3461 mvpp22_gop_mask_irq(port); 3462 3463 if (mvpp2_port_supports_xlg(port) && 3464 mvpp2_is_xlg(port->phy_interface)) { 3465 /* Check the external status register */ 3466 val = readl(port->base + MVPP22_XLG_EXT_INT_STAT); 3467 if (val & MVPP22_XLG_EXT_INT_STAT_XLG) 3468 mvpp2_isr_handle_xlg(port); 3469 if (val & MVPP22_XLG_EXT_INT_STAT_PTP) 3470 mvpp2_isr_handle_ptp(port); 3471 } else { 3472 /* If it's not the XLG, we must be using the GMAC. 3473 * Check the summary status. 3474 */ 3475 val = readl(port->base + MVPP22_GMAC_INT_SUM_STAT); 3476 if (val & MVPP22_GMAC_INT_SUM_STAT_INTERNAL) 3477 mvpp2_isr_handle_gmac_internal(port); 3478 if (val & MVPP22_GMAC_INT_SUM_STAT_PTP) 3479 mvpp2_isr_handle_ptp(port); 3480 } 3481 3482 mvpp22_gop_unmask_irq(port); 3483 return IRQ_HANDLED; 3484 } 3485 3486 static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer) 3487 { 3488 struct net_device *dev; 3489 struct mvpp2_port *port; 3490 struct mvpp2_port_pcpu *port_pcpu; 3491 unsigned int tx_todo, cause; 3492 3493 port_pcpu = container_of(timer, struct mvpp2_port_pcpu, tx_done_timer); 3494 dev = port_pcpu->dev; 3495 3496 if (!netif_running(dev)) 3497 return HRTIMER_NORESTART; 3498 3499 port_pcpu->timer_scheduled = false; 3500 port = netdev_priv(dev); 3501 3502 /* Process all the Tx queues */ 3503 cause = (1 << port->ntxqs) - 1; 3504 tx_todo = mvpp2_tx_done(port, cause, 3505 mvpp2_cpu_to_thread(port->priv, smp_processor_id())); 3506 3507 /* Set the timer in case not all the packets were processed */ 3508 if (tx_todo && !port_pcpu->timer_scheduled) { 3509 port_pcpu->timer_scheduled = true; 3510 hrtimer_forward_now(&port_pcpu->tx_done_timer, 3511 MVPP2_TXDONE_HRTIMER_PERIOD_NS); 3512 3513 return HRTIMER_RESTART; 3514 } 3515 return HRTIMER_NORESTART; 3516 } 3517 3518 /* Main RX/TX processing routines */ 3519 3520 /* Display more error info */ 3521 static void mvpp2_rx_error(struct mvpp2_port *port, 3522 struct mvpp2_rx_desc *rx_desc) 3523 { 3524 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 3525 size_t sz = mvpp2_rxdesc_size_get(port, rx_desc); 3526 char *err_str = NULL; 3527 3528 switch (status & MVPP2_RXD_ERR_CODE_MASK) { 3529 case MVPP2_RXD_ERR_CRC: 3530 err_str = "crc"; 3531 break; 3532 case MVPP2_RXD_ERR_OVERRUN: 3533 err_str = "overrun"; 3534 break; 3535 case MVPP2_RXD_ERR_RESOURCE: 3536 err_str = "resource"; 3537 break; 3538 } 3539 if (err_str && net_ratelimit()) 3540 netdev_err(port->dev, 3541 "bad rx status %08x (%s error), size=%zu\n", 3542 status, err_str, sz); 3543 } 3544 3545 /* Handle RX checksum offload */ 3546 static int mvpp2_rx_csum(struct mvpp2_port *port, u32 status) 3547 { 3548 if (((status & MVPP2_RXD_L3_IP4) && 3549 !(status & MVPP2_RXD_IP4_HEADER_ERR)) || 3550 (status & MVPP2_RXD_L3_IP6)) 3551 if (((status & MVPP2_RXD_L4_UDP) || 3552 (status & MVPP2_RXD_L4_TCP)) && 3553 (status & MVPP2_RXD_L4_CSUM_OK)) 3554 return CHECKSUM_UNNECESSARY; 3555 3556 return CHECKSUM_NONE; 3557 } 3558 3559 /* Allocate a new skb and add it to BM pool */ 3560 static int mvpp2_rx_refill(struct mvpp2_port *port, 3561 struct mvpp2_bm_pool *bm_pool, 3562 struct page_pool *page_pool, int pool) 3563 { 3564 dma_addr_t dma_addr; 3565 phys_addr_t phys_addr; 3566 void *buf; 3567 3568 buf = mvpp2_buf_alloc(port, bm_pool, page_pool, 3569 &dma_addr, &phys_addr, GFP_ATOMIC); 3570 if (!buf) 3571 return -ENOMEM; 3572 3573 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3574 3575 return 0; 3576 } 3577 3578 /* Handle tx checksum */ 3579 static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb) 3580 { 3581 if (skb->ip_summed == CHECKSUM_PARTIAL) { 3582 int ip_hdr_len = 0; 3583 u8 l4_proto; 3584 __be16 l3_proto = vlan_get_protocol(skb); 3585 3586 if (l3_proto == htons(ETH_P_IP)) { 3587 struct iphdr *ip4h = ip_hdr(skb); 3588 3589 /* Calculate IPv4 checksum and L4 checksum */ 3590 ip_hdr_len = ip4h->ihl; 3591 l4_proto = ip4h->protocol; 3592 } else if (l3_proto == htons(ETH_P_IPV6)) { 3593 struct ipv6hdr *ip6h = ipv6_hdr(skb); 3594 3595 /* Read l4_protocol from one of IPv6 extra headers */ 3596 if (skb_network_header_len(skb) > 0) 3597 ip_hdr_len = (skb_network_header_len(skb) >> 2); 3598 l4_proto = ip6h->nexthdr; 3599 } else { 3600 return MVPP2_TXD_L4_CSUM_NOT; 3601 } 3602 3603 return mvpp2_txq_desc_csum(skb_network_offset(skb), 3604 l3_proto, ip_hdr_len, l4_proto); 3605 } 3606 3607 return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE; 3608 } 3609 3610 static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit, int nxmit_byte) 3611 { 3612 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3613 struct mvpp2_tx_queue *aggr_txq; 3614 struct mvpp2_txq_pcpu *txq_pcpu; 3615 struct mvpp2_tx_queue *txq; 3616 struct netdev_queue *nq; 3617 3618 txq = port->txqs[txq_id]; 3619 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3620 nq = netdev_get_tx_queue(port->dev, txq_id); 3621 aggr_txq = &port->priv->aggr_txqs[thread]; 3622 3623 txq_pcpu->reserved_num -= nxmit; 3624 txq_pcpu->count += nxmit; 3625 aggr_txq->count += nxmit; 3626 3627 /* Enable transmit */ 3628 wmb(); 3629 mvpp2_aggr_txq_pend_desc_add(port, nxmit); 3630 3631 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 3632 netif_tx_stop_queue(nq); 3633 3634 /* Finalize TX processing */ 3635 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 3636 mvpp2_txq_done(port, txq, txq_pcpu); 3637 } 3638 3639 static int 3640 mvpp2_xdp_submit_frame(struct mvpp2_port *port, u16 txq_id, 3641 struct xdp_frame *xdpf, bool dma_map) 3642 { 3643 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3644 u32 tx_cmd = MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE | 3645 MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 3646 enum mvpp2_tx_buf_type buf_type; 3647 struct mvpp2_txq_pcpu *txq_pcpu; 3648 struct mvpp2_tx_queue *aggr_txq; 3649 struct mvpp2_tx_desc *tx_desc; 3650 struct mvpp2_tx_queue *txq; 3651 int ret = MVPP2_XDP_TX; 3652 dma_addr_t dma_addr; 3653 3654 txq = port->txqs[txq_id]; 3655 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3656 aggr_txq = &port->priv->aggr_txqs[thread]; 3657 3658 /* Check number of available descriptors */ 3659 if (mvpp2_aggr_desc_num_check(port, aggr_txq, 1) || 3660 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 1)) { 3661 ret = MVPP2_XDP_DROPPED; 3662 goto out; 3663 } 3664 3665 /* Get a descriptor for the first part of the packet */ 3666 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3667 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3668 mvpp2_txdesc_size_set(port, tx_desc, xdpf->len); 3669 3670 if (dma_map) { 3671 /* XDP_REDIRECT or AF_XDP */ 3672 dma_addr = dma_map_single(port->dev->dev.parent, xdpf->data, 3673 xdpf->len, DMA_TO_DEVICE); 3674 3675 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 3676 mvpp2_txq_desc_put(txq); 3677 ret = MVPP2_XDP_DROPPED; 3678 goto out; 3679 } 3680 3681 buf_type = MVPP2_TYPE_XDP_NDO; 3682 } else { 3683 /* XDP_TX */ 3684 struct page *page = virt_to_page(xdpf->data); 3685 3686 dma_addr = page_pool_get_dma_addr(page) + 3687 sizeof(*xdpf) + xdpf->headroom; 3688 dma_sync_single_for_device(port->dev->dev.parent, dma_addr, 3689 xdpf->len, DMA_BIDIRECTIONAL); 3690 3691 buf_type = MVPP2_TYPE_XDP_TX; 3692 } 3693 3694 mvpp2_txdesc_dma_addr_set(port, tx_desc, dma_addr); 3695 3696 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 3697 mvpp2_txq_inc_put(port, txq_pcpu, xdpf, tx_desc, buf_type); 3698 3699 out: 3700 return ret; 3701 } 3702 3703 static int 3704 mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp) 3705 { 3706 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 3707 struct xdp_frame *xdpf; 3708 u16 txq_id; 3709 int ret; 3710 3711 xdpf = xdp_convert_buff_to_frame(xdp); 3712 if (unlikely(!xdpf)) 3713 return MVPP2_XDP_DROPPED; 3714 3715 /* The first of the TX queues are used for XPS, 3716 * the second half for XDP_TX 3717 */ 3718 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3719 3720 ret = mvpp2_xdp_submit_frame(port, txq_id, xdpf, false); 3721 if (ret == MVPP2_XDP_TX) { 3722 u64_stats_update_begin(&stats->syncp); 3723 stats->tx_bytes += xdpf->len; 3724 stats->tx_packets++; 3725 stats->xdp_tx++; 3726 u64_stats_update_end(&stats->syncp); 3727 3728 mvpp2_xdp_finish_tx(port, txq_id, 1, xdpf->len); 3729 } else { 3730 u64_stats_update_begin(&stats->syncp); 3731 stats->xdp_tx_err++; 3732 u64_stats_update_end(&stats->syncp); 3733 } 3734 3735 return ret; 3736 } 3737 3738 static int 3739 mvpp2_xdp_xmit(struct net_device *dev, int num_frame, 3740 struct xdp_frame **frames, u32 flags) 3741 { 3742 struct mvpp2_port *port = netdev_priv(dev); 3743 int i, nxmit_byte = 0, nxmit = 0; 3744 struct mvpp2_pcpu_stats *stats; 3745 u16 txq_id; 3746 u32 ret; 3747 3748 if (unlikely(test_bit(0, &port->state))) 3749 return -ENETDOWN; 3750 3751 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 3752 return -EINVAL; 3753 3754 /* The first of the TX queues are used for XPS, 3755 * the second half for XDP_TX 3756 */ 3757 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3758 3759 for (i = 0; i < num_frame; i++) { 3760 ret = mvpp2_xdp_submit_frame(port, txq_id, frames[i], true); 3761 if (ret != MVPP2_XDP_TX) 3762 break; 3763 3764 nxmit_byte += frames[i]->len; 3765 nxmit++; 3766 } 3767 3768 if (likely(nxmit > 0)) 3769 mvpp2_xdp_finish_tx(port, txq_id, nxmit, nxmit_byte); 3770 3771 stats = this_cpu_ptr(port->stats); 3772 u64_stats_update_begin(&stats->syncp); 3773 stats->tx_bytes += nxmit_byte; 3774 stats->tx_packets += nxmit; 3775 stats->xdp_xmit += nxmit; 3776 stats->xdp_xmit_err += num_frame - nxmit; 3777 u64_stats_update_end(&stats->syncp); 3778 3779 return nxmit; 3780 } 3781 3782 static int 3783 mvpp2_run_xdp(struct mvpp2_port *port, struct bpf_prog *prog, 3784 struct xdp_buff *xdp, struct page_pool *pp, 3785 struct mvpp2_pcpu_stats *stats) 3786 { 3787 unsigned int len, sync, err; 3788 struct page *page; 3789 u32 ret, act; 3790 3791 len = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3792 act = bpf_prog_run_xdp(prog, xdp); 3793 3794 /* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */ 3795 sync = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3796 sync = max(sync, len); 3797 3798 switch (act) { 3799 case XDP_PASS: 3800 stats->xdp_pass++; 3801 ret = MVPP2_XDP_PASS; 3802 break; 3803 case XDP_REDIRECT: 3804 err = xdp_do_redirect(port->dev, xdp, prog); 3805 if (unlikely(err)) { 3806 ret = MVPP2_XDP_DROPPED; 3807 page = virt_to_head_page(xdp->data); 3808 page_pool_put_page(pp, page, sync, true); 3809 } else { 3810 ret = MVPP2_XDP_REDIR; 3811 stats->xdp_redirect++; 3812 } 3813 break; 3814 case XDP_TX: 3815 ret = mvpp2_xdp_xmit_back(port, xdp); 3816 if (ret != MVPP2_XDP_TX) { 3817 page = virt_to_head_page(xdp->data); 3818 page_pool_put_page(pp, page, sync, true); 3819 } 3820 break; 3821 default: 3822 bpf_warn_invalid_xdp_action(act); 3823 fallthrough; 3824 case XDP_ABORTED: 3825 trace_xdp_exception(port->dev, prog, act); 3826 fallthrough; 3827 case XDP_DROP: 3828 page = virt_to_head_page(xdp->data); 3829 page_pool_put_page(pp, page, sync, true); 3830 ret = MVPP2_XDP_DROPPED; 3831 stats->xdp_drop++; 3832 break; 3833 } 3834 3835 return ret; 3836 } 3837 3838 static void mvpp2_buff_hdr_pool_put(struct mvpp2_port *port, struct mvpp2_rx_desc *rx_desc, 3839 int pool, u32 rx_status) 3840 { 3841 phys_addr_t phys_addr, phys_addr_next; 3842 dma_addr_t dma_addr, dma_addr_next; 3843 struct mvpp2_buff_hdr *buff_hdr; 3844 3845 phys_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 3846 dma_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 3847 3848 do { 3849 buff_hdr = (struct mvpp2_buff_hdr *)phys_to_virt(phys_addr); 3850 3851 phys_addr_next = le32_to_cpu(buff_hdr->next_phys_addr); 3852 dma_addr_next = le32_to_cpu(buff_hdr->next_dma_addr); 3853 3854 if (port->priv->hw_version >= MVPP22) { 3855 phys_addr_next |= ((u64)buff_hdr->next_phys_addr_high << 32); 3856 dma_addr_next |= ((u64)buff_hdr->next_dma_addr_high << 32); 3857 } 3858 3859 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3860 3861 phys_addr = phys_addr_next; 3862 dma_addr = dma_addr_next; 3863 3864 } while (!MVPP2_B_HDR_INFO_IS_LAST(le16_to_cpu(buff_hdr->info))); 3865 } 3866 3867 /* Main rx processing */ 3868 static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi, 3869 int rx_todo, struct mvpp2_rx_queue *rxq) 3870 { 3871 struct net_device *dev = port->dev; 3872 struct mvpp2_pcpu_stats ps = {}; 3873 enum dma_data_direction dma_dir; 3874 struct bpf_prog *xdp_prog; 3875 struct xdp_buff xdp; 3876 int rx_received; 3877 int rx_done = 0; 3878 u32 xdp_ret = 0; 3879 3880 rcu_read_lock(); 3881 3882 xdp_prog = READ_ONCE(port->xdp_prog); 3883 3884 /* Get number of received packets and clamp the to-do */ 3885 rx_received = mvpp2_rxq_received(port, rxq->id); 3886 if (rx_todo > rx_received) 3887 rx_todo = rx_received; 3888 3889 while (rx_done < rx_todo) { 3890 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 3891 struct mvpp2_bm_pool *bm_pool; 3892 struct page_pool *pp = NULL; 3893 struct sk_buff *skb; 3894 unsigned int frag_size; 3895 dma_addr_t dma_addr; 3896 phys_addr_t phys_addr; 3897 u32 rx_status, timestamp; 3898 int pool, rx_bytes, err, ret; 3899 struct page *page; 3900 void *data; 3901 3902 phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 3903 data = (void *)phys_to_virt(phys_addr); 3904 page = virt_to_page(data); 3905 prefetch(page); 3906 3907 rx_done++; 3908 rx_status = mvpp2_rxdesc_status_get(port, rx_desc); 3909 rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc); 3910 rx_bytes -= MVPP2_MH_SIZE; 3911 dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 3912 3913 pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >> 3914 MVPP2_RXD_BM_POOL_ID_OFFS; 3915 bm_pool = &port->priv->bm_pools[pool]; 3916 3917 if (port->priv->percpu_pools) { 3918 pp = port->priv->page_pool[pool]; 3919 dma_dir = page_pool_get_dma_dir(pp); 3920 } else { 3921 dma_dir = DMA_FROM_DEVICE; 3922 } 3923 3924 dma_sync_single_for_cpu(dev->dev.parent, dma_addr, 3925 rx_bytes + MVPP2_MH_SIZE, 3926 dma_dir); 3927 3928 /* Buffer header not supported */ 3929 if (rx_status & MVPP2_RXD_BUF_HDR) 3930 goto err_drop_frame; 3931 3932 /* In case of an error, release the requested buffer pointer 3933 * to the Buffer Manager. This request process is controlled 3934 * by the hardware, and the information about the buffer is 3935 * comprised by the RX descriptor. 3936 */ 3937 if (rx_status & MVPP2_RXD_ERR_SUMMARY) 3938 goto err_drop_frame; 3939 3940 /* Prefetch header */ 3941 prefetch(data + MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM); 3942 3943 if (bm_pool->frag_size > PAGE_SIZE) 3944 frag_size = 0; 3945 else 3946 frag_size = bm_pool->frag_size; 3947 3948 if (xdp_prog) { 3949 struct xdp_rxq_info *xdp_rxq; 3950 3951 if (bm_pool->pkt_size == MVPP2_BM_SHORT_PKT_SIZE) 3952 xdp_rxq = &rxq->xdp_rxq_short; 3953 else 3954 xdp_rxq = &rxq->xdp_rxq_long; 3955 3956 xdp_init_buff(&xdp, PAGE_SIZE, xdp_rxq); 3957 xdp_prepare_buff(&xdp, data, 3958 MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM, 3959 rx_bytes, false); 3960 3961 ret = mvpp2_run_xdp(port, xdp_prog, &xdp, pp, &ps); 3962 3963 if (ret) { 3964 xdp_ret |= ret; 3965 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 3966 if (err) { 3967 netdev_err(port->dev, "failed to refill BM pools\n"); 3968 goto err_drop_frame; 3969 } 3970 3971 ps.rx_packets++; 3972 ps.rx_bytes += rx_bytes; 3973 continue; 3974 } 3975 } 3976 3977 skb = build_skb(data, frag_size); 3978 if (!skb) { 3979 netdev_warn(port->dev, "skb build failed\n"); 3980 goto err_drop_frame; 3981 } 3982 3983 /* If we have RX hardware timestamping enabled, grab the 3984 * timestamp from the queue and convert. 3985 */ 3986 if (mvpp22_rx_hwtstamping(port)) { 3987 timestamp = le32_to_cpu(rx_desc->pp22.timestamp); 3988 mvpp22_tai_tstamp(port->priv->tai, timestamp, 3989 skb_hwtstamps(skb)); 3990 } 3991 3992 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 3993 if (err) { 3994 netdev_err(port->dev, "failed to refill BM pools\n"); 3995 dev_kfree_skb_any(skb); 3996 goto err_drop_frame; 3997 } 3998 3999 if (pp) 4000 skb_mark_for_recycle(skb, page, pp); 4001 else 4002 dma_unmap_single_attrs(dev->dev.parent, dma_addr, 4003 bm_pool->buf_size, DMA_FROM_DEVICE, 4004 DMA_ATTR_SKIP_CPU_SYNC); 4005 4006 ps.rx_packets++; 4007 ps.rx_bytes += rx_bytes; 4008 4009 skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM); 4010 skb_put(skb, rx_bytes); 4011 skb->ip_summed = mvpp2_rx_csum(port, rx_status); 4012 skb->protocol = eth_type_trans(skb, dev); 4013 4014 napi_gro_receive(napi, skb); 4015 continue; 4016 4017 err_drop_frame: 4018 dev->stats.rx_errors++; 4019 mvpp2_rx_error(port, rx_desc); 4020 /* Return the buffer to the pool */ 4021 if (rx_status & MVPP2_RXD_BUF_HDR) 4022 mvpp2_buff_hdr_pool_put(port, rx_desc, pool, rx_status); 4023 else 4024 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 4025 } 4026 4027 rcu_read_unlock(); 4028 4029 if (xdp_ret & MVPP2_XDP_REDIR) 4030 xdp_do_flush_map(); 4031 4032 if (ps.rx_packets) { 4033 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 4034 4035 u64_stats_update_begin(&stats->syncp); 4036 stats->rx_packets += ps.rx_packets; 4037 stats->rx_bytes += ps.rx_bytes; 4038 /* xdp */ 4039 stats->xdp_redirect += ps.xdp_redirect; 4040 stats->xdp_pass += ps.xdp_pass; 4041 stats->xdp_drop += ps.xdp_drop; 4042 u64_stats_update_end(&stats->syncp); 4043 } 4044 4045 /* Update Rx queue management counters */ 4046 wmb(); 4047 mvpp2_rxq_status_update(port, rxq->id, rx_done, rx_done); 4048 4049 return rx_todo; 4050 } 4051 4052 static inline void 4053 tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 4054 struct mvpp2_tx_desc *desc) 4055 { 4056 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4057 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4058 4059 dma_addr_t buf_dma_addr = 4060 mvpp2_txdesc_dma_addr_get(port, desc); 4061 size_t buf_sz = 4062 mvpp2_txdesc_size_get(port, desc); 4063 if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr)) 4064 dma_unmap_single(port->dev->dev.parent, buf_dma_addr, 4065 buf_sz, DMA_TO_DEVICE); 4066 mvpp2_txq_desc_put(txq); 4067 } 4068 4069 static void mvpp2_txdesc_clear_ptp(struct mvpp2_port *port, 4070 struct mvpp2_tx_desc *desc) 4071 { 4072 /* We only need to clear the low bits */ 4073 if (port->priv->hw_version >= MVPP22) 4074 desc->pp22.ptp_descriptor &= 4075 cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW); 4076 } 4077 4078 static bool mvpp2_tx_hw_tstamp(struct mvpp2_port *port, 4079 struct mvpp2_tx_desc *tx_desc, 4080 struct sk_buff *skb) 4081 { 4082 struct mvpp2_hwtstamp_queue *queue; 4083 unsigned int mtype, type, i; 4084 struct ptp_header *hdr; 4085 u64 ptpdesc; 4086 4087 if (port->priv->hw_version == MVPP21 || 4088 port->tx_hwtstamp_type == HWTSTAMP_TX_OFF) 4089 return false; 4090 4091 type = ptp_classify_raw(skb); 4092 if (!type) 4093 return false; 4094 4095 hdr = ptp_parse_header(skb, type); 4096 if (!hdr) 4097 return false; 4098 4099 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 4100 4101 ptpdesc = MVPP22_PTP_MACTIMESTAMPINGEN | 4102 MVPP22_PTP_ACTION_CAPTURE; 4103 queue = &port->tx_hwtstamp_queue[0]; 4104 4105 switch (type & PTP_CLASS_VMASK) { 4106 case PTP_CLASS_V1: 4107 ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV1); 4108 break; 4109 4110 case PTP_CLASS_V2: 4111 ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV2); 4112 mtype = hdr->tsmt & 15; 4113 /* Direct PTP Sync messages to queue 1 */ 4114 if (mtype == 0) { 4115 ptpdesc |= MVPP22_PTP_TIMESTAMPQUEUESELECT; 4116 queue = &port->tx_hwtstamp_queue[1]; 4117 } 4118 break; 4119 } 4120 4121 /* Take a reference on the skb and insert into our queue */ 4122 i = queue->next; 4123 queue->next = (i + 1) & 31; 4124 if (queue->skb[i]) 4125 dev_kfree_skb_any(queue->skb[i]); 4126 queue->skb[i] = skb_get(skb); 4127 4128 ptpdesc |= MVPP22_PTP_TIMESTAMPENTRYID(i); 4129 4130 /* 4131 * 3:0 - PTPAction 4132 * 6:4 - PTPPacketFormat 4133 * 7 - PTP_CF_WraparoundCheckEn 4134 * 9:8 - IngressTimestampSeconds[1:0] 4135 * 10 - Reserved 4136 * 11 - MACTimestampingEn 4137 * 17:12 - PTP_TimestampQueueEntryID[5:0] 4138 * 18 - PTPTimestampQueueSelect 4139 * 19 - UDPChecksumUpdateEn 4140 * 27:20 - TimestampOffset 4141 * PTP, NTPTransmit, OWAMP/TWAMP - L3 to PTP header 4142 * NTPTs, Y.1731 - L3 to timestamp entry 4143 * 35:28 - UDP Checksum Offset 4144 * 4145 * stored in tx descriptor bits 75:64 (11:0) and 191:168 (35:12) 4146 */ 4147 tx_desc->pp22.ptp_descriptor &= 4148 cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW); 4149 tx_desc->pp22.ptp_descriptor |= 4150 cpu_to_le32(ptpdesc & MVPP22_PTP_DESC_MASK_LOW); 4151 tx_desc->pp22.buf_dma_addr_ptp &= cpu_to_le64(~0xffffff0000000000ULL); 4152 tx_desc->pp22.buf_dma_addr_ptp |= cpu_to_le64((ptpdesc >> 12) << 40); 4153 4154 return true; 4155 } 4156 4157 /* Handle tx fragmentation processing */ 4158 static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb, 4159 struct mvpp2_tx_queue *aggr_txq, 4160 struct mvpp2_tx_queue *txq) 4161 { 4162 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4163 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4164 struct mvpp2_tx_desc *tx_desc; 4165 int i; 4166 dma_addr_t buf_dma_addr; 4167 4168 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 4169 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 4170 void *addr = skb_frag_address(frag); 4171 4172 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4173 mvpp2_txdesc_clear_ptp(port, tx_desc); 4174 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4175 mvpp2_txdesc_size_set(port, tx_desc, skb_frag_size(frag)); 4176 4177 buf_dma_addr = dma_map_single(port->dev->dev.parent, addr, 4178 skb_frag_size(frag), 4179 DMA_TO_DEVICE); 4180 if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) { 4181 mvpp2_txq_desc_put(txq); 4182 goto cleanup; 4183 } 4184 4185 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4186 4187 if (i == (skb_shinfo(skb)->nr_frags - 1)) { 4188 /* Last descriptor */ 4189 mvpp2_txdesc_cmd_set(port, tx_desc, 4190 MVPP2_TXD_L_DESC); 4191 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4192 } else { 4193 /* Descriptor in the middle: Not First, Not Last */ 4194 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 4195 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4196 } 4197 } 4198 4199 return 0; 4200 cleanup: 4201 /* Release all descriptors that were used to map fragments of 4202 * this packet, as well as the corresponding DMA mappings 4203 */ 4204 for (i = i - 1; i >= 0; i--) { 4205 tx_desc = txq->descs + i; 4206 tx_desc_unmap_put(port, txq, tx_desc); 4207 } 4208 4209 return -ENOMEM; 4210 } 4211 4212 static inline void mvpp2_tso_put_hdr(struct sk_buff *skb, 4213 struct net_device *dev, 4214 struct mvpp2_tx_queue *txq, 4215 struct mvpp2_tx_queue *aggr_txq, 4216 struct mvpp2_txq_pcpu *txq_pcpu, 4217 int hdr_sz) 4218 { 4219 struct mvpp2_port *port = netdev_priv(dev); 4220 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4221 dma_addr_t addr; 4222 4223 mvpp2_txdesc_clear_ptp(port, tx_desc); 4224 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4225 mvpp2_txdesc_size_set(port, tx_desc, hdr_sz); 4226 4227 addr = txq_pcpu->tso_headers_dma + 4228 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 4229 mvpp2_txdesc_dma_addr_set(port, tx_desc, addr); 4230 4231 mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) | 4232 MVPP2_TXD_F_DESC | 4233 MVPP2_TXD_PADDING_DISABLE); 4234 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4235 } 4236 4237 static inline int mvpp2_tso_put_data(struct sk_buff *skb, 4238 struct net_device *dev, struct tso_t *tso, 4239 struct mvpp2_tx_queue *txq, 4240 struct mvpp2_tx_queue *aggr_txq, 4241 struct mvpp2_txq_pcpu *txq_pcpu, 4242 int sz, bool left, bool last) 4243 { 4244 struct mvpp2_port *port = netdev_priv(dev); 4245 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4246 dma_addr_t buf_dma_addr; 4247 4248 mvpp2_txdesc_clear_ptp(port, tx_desc); 4249 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4250 mvpp2_txdesc_size_set(port, tx_desc, sz); 4251 4252 buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz, 4253 DMA_TO_DEVICE); 4254 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 4255 mvpp2_txq_desc_put(txq); 4256 return -ENOMEM; 4257 } 4258 4259 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4260 4261 if (!left) { 4262 mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC); 4263 if (last) { 4264 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4265 return 0; 4266 } 4267 } else { 4268 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 4269 } 4270 4271 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4272 return 0; 4273 } 4274 4275 static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev, 4276 struct mvpp2_tx_queue *txq, 4277 struct mvpp2_tx_queue *aggr_txq, 4278 struct mvpp2_txq_pcpu *txq_pcpu) 4279 { 4280 struct mvpp2_port *port = netdev_priv(dev); 4281 int hdr_sz, i, len, descs = 0; 4282 struct tso_t tso; 4283 4284 /* Check number of available descriptors */ 4285 if (mvpp2_aggr_desc_num_check(port, aggr_txq, tso_count_descs(skb)) || 4286 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 4287 tso_count_descs(skb))) 4288 return 0; 4289 4290 hdr_sz = tso_start(skb, &tso); 4291 4292 len = skb->len - hdr_sz; 4293 while (len > 0) { 4294 int left = min_t(int, skb_shinfo(skb)->gso_size, len); 4295 char *hdr = txq_pcpu->tso_headers + 4296 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 4297 4298 len -= left; 4299 descs++; 4300 4301 tso_build_hdr(skb, hdr, &tso, left, len == 0); 4302 mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz); 4303 4304 while (left > 0) { 4305 int sz = min_t(int, tso.size, left); 4306 left -= sz; 4307 descs++; 4308 4309 if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq, 4310 txq_pcpu, sz, left, len == 0)) 4311 goto release; 4312 tso_build_data(skb, &tso, sz); 4313 } 4314 } 4315 4316 return descs; 4317 4318 release: 4319 for (i = descs - 1; i >= 0; i--) { 4320 struct mvpp2_tx_desc *tx_desc = txq->descs + i; 4321 tx_desc_unmap_put(port, txq, tx_desc); 4322 } 4323 return 0; 4324 } 4325 4326 /* Main tx processing */ 4327 static netdev_tx_t mvpp2_tx(struct sk_buff *skb, struct net_device *dev) 4328 { 4329 struct mvpp2_port *port = netdev_priv(dev); 4330 struct mvpp2_tx_queue *txq, *aggr_txq; 4331 struct mvpp2_txq_pcpu *txq_pcpu; 4332 struct mvpp2_tx_desc *tx_desc; 4333 dma_addr_t buf_dma_addr; 4334 unsigned long flags = 0; 4335 unsigned int thread; 4336 int frags = 0; 4337 u16 txq_id; 4338 u32 tx_cmd; 4339 4340 thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4341 4342 txq_id = skb_get_queue_mapping(skb); 4343 txq = port->txqs[txq_id]; 4344 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4345 aggr_txq = &port->priv->aggr_txqs[thread]; 4346 4347 if (test_bit(thread, &port->priv->lock_map)) 4348 spin_lock_irqsave(&port->tx_lock[thread], flags); 4349 4350 if (skb_is_gso(skb)) { 4351 frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu); 4352 goto out; 4353 } 4354 frags = skb_shinfo(skb)->nr_frags + 1; 4355 4356 /* Check number of available descriptors */ 4357 if (mvpp2_aggr_desc_num_check(port, aggr_txq, frags) || 4358 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, frags)) { 4359 frags = 0; 4360 goto out; 4361 } 4362 4363 /* Get a descriptor for the first part of the packet */ 4364 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4365 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) || 4366 !mvpp2_tx_hw_tstamp(port, tx_desc, skb)) 4367 mvpp2_txdesc_clear_ptp(port, tx_desc); 4368 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4369 mvpp2_txdesc_size_set(port, tx_desc, skb_headlen(skb)); 4370 4371 buf_dma_addr = dma_map_single(dev->dev.parent, skb->data, 4372 skb_headlen(skb), DMA_TO_DEVICE); 4373 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 4374 mvpp2_txq_desc_put(txq); 4375 frags = 0; 4376 goto out; 4377 } 4378 4379 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4380 4381 tx_cmd = mvpp2_skb_tx_csum(port, skb); 4382 4383 if (frags == 1) { 4384 /* First and Last descriptor */ 4385 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 4386 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 4387 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4388 } else { 4389 /* First but not Last */ 4390 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE; 4391 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 4392 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4393 4394 /* Continue with other skb fragments */ 4395 if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) { 4396 tx_desc_unmap_put(port, txq, tx_desc); 4397 frags = 0; 4398 } 4399 } 4400 4401 out: 4402 if (frags > 0) { 4403 struct mvpp2_pcpu_stats *stats = per_cpu_ptr(port->stats, thread); 4404 struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); 4405 4406 txq_pcpu->reserved_num -= frags; 4407 txq_pcpu->count += frags; 4408 aggr_txq->count += frags; 4409 4410 /* Enable transmit */ 4411 wmb(); 4412 mvpp2_aggr_txq_pend_desc_add(port, frags); 4413 4414 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 4415 netif_tx_stop_queue(nq); 4416 4417 u64_stats_update_begin(&stats->syncp); 4418 stats->tx_packets++; 4419 stats->tx_bytes += skb->len; 4420 u64_stats_update_end(&stats->syncp); 4421 } else { 4422 dev->stats.tx_dropped++; 4423 dev_kfree_skb_any(skb); 4424 } 4425 4426 /* Finalize TX processing */ 4427 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 4428 mvpp2_txq_done(port, txq, txq_pcpu); 4429 4430 /* Set the timer in case not all frags were processed */ 4431 if (!port->has_tx_irqs && txq_pcpu->count <= frags && 4432 txq_pcpu->count > 0) { 4433 struct mvpp2_port_pcpu *port_pcpu = per_cpu_ptr(port->pcpu, thread); 4434 4435 if (!port_pcpu->timer_scheduled) { 4436 port_pcpu->timer_scheduled = true; 4437 hrtimer_start(&port_pcpu->tx_done_timer, 4438 MVPP2_TXDONE_HRTIMER_PERIOD_NS, 4439 HRTIMER_MODE_REL_PINNED_SOFT); 4440 } 4441 } 4442 4443 if (test_bit(thread, &port->priv->lock_map)) 4444 spin_unlock_irqrestore(&port->tx_lock[thread], flags); 4445 4446 return NETDEV_TX_OK; 4447 } 4448 4449 static inline void mvpp2_cause_error(struct net_device *dev, int cause) 4450 { 4451 if (cause & MVPP2_CAUSE_FCS_ERR_MASK) 4452 netdev_err(dev, "FCS error\n"); 4453 if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK) 4454 netdev_err(dev, "rx fifo overrun error\n"); 4455 if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK) 4456 netdev_err(dev, "tx fifo underrun error\n"); 4457 } 4458 4459 static int mvpp2_poll(struct napi_struct *napi, int budget) 4460 { 4461 u32 cause_rx_tx, cause_rx, cause_tx, cause_misc; 4462 int rx_done = 0; 4463 struct mvpp2_port *port = netdev_priv(napi->dev); 4464 struct mvpp2_queue_vector *qv; 4465 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4466 4467 qv = container_of(napi, struct mvpp2_queue_vector, napi); 4468 4469 /* Rx/Tx cause register 4470 * 4471 * Bits 0-15: each bit indicates received packets on the Rx queue 4472 * (bit 0 is for Rx queue 0). 4473 * 4474 * Bits 16-23: each bit indicates transmitted packets on the Tx queue 4475 * (bit 16 is for Tx queue 0). 4476 * 4477 * Each CPU has its own Rx/Tx cause register 4478 */ 4479 cause_rx_tx = mvpp2_thread_read_relaxed(port->priv, qv->sw_thread_id, 4480 MVPP2_ISR_RX_TX_CAUSE_REG(port->id)); 4481 4482 cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK; 4483 if (cause_misc) { 4484 mvpp2_cause_error(port->dev, cause_misc); 4485 4486 /* Clear the cause register */ 4487 mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0); 4488 mvpp2_thread_write(port->priv, thread, 4489 MVPP2_ISR_RX_TX_CAUSE_REG(port->id), 4490 cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK); 4491 } 4492 4493 if (port->has_tx_irqs) { 4494 cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 4495 if (cause_tx) { 4496 cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET; 4497 mvpp2_tx_done(port, cause_tx, qv->sw_thread_id); 4498 } 4499 } 4500 4501 /* Process RX packets */ 4502 cause_rx = cause_rx_tx & 4503 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 4504 cause_rx <<= qv->first_rxq; 4505 cause_rx |= qv->pending_cause_rx; 4506 while (cause_rx && budget > 0) { 4507 int count; 4508 struct mvpp2_rx_queue *rxq; 4509 4510 rxq = mvpp2_get_rx_queue(port, cause_rx); 4511 if (!rxq) 4512 break; 4513 4514 count = mvpp2_rx(port, napi, budget, rxq); 4515 rx_done += count; 4516 budget -= count; 4517 if (budget > 0) { 4518 /* Clear the bit associated to this Rx queue 4519 * so that next iteration will continue from 4520 * the next Rx queue. 4521 */ 4522 cause_rx &= ~(1 << rxq->logic_rxq); 4523 } 4524 } 4525 4526 if (budget > 0) { 4527 cause_rx = 0; 4528 napi_complete_done(napi, rx_done); 4529 4530 mvpp2_qvec_interrupt_enable(qv); 4531 } 4532 qv->pending_cause_rx = cause_rx; 4533 return rx_done; 4534 } 4535 4536 static void mvpp22_mode_reconfigure(struct mvpp2_port *port) 4537 { 4538 u32 ctrl3; 4539 4540 /* Set the GMAC & XLG MAC in reset */ 4541 mvpp2_mac_reset_assert(port); 4542 4543 /* Set the MPCS and XPCS in reset */ 4544 mvpp22_pcs_reset_assert(port); 4545 4546 /* comphy reconfiguration */ 4547 mvpp22_comphy_init(port); 4548 4549 /* gop reconfiguration */ 4550 mvpp22_gop_init(port); 4551 4552 mvpp22_pcs_reset_deassert(port); 4553 4554 if (mvpp2_port_supports_xlg(port)) { 4555 ctrl3 = readl(port->base + MVPP22_XLG_CTRL3_REG); 4556 ctrl3 &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 4557 4558 if (mvpp2_is_xlg(port->phy_interface)) 4559 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_10G; 4560 else 4561 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC; 4562 4563 writel(ctrl3, port->base + MVPP22_XLG_CTRL3_REG); 4564 } 4565 4566 if (mvpp2_port_supports_xlg(port) && mvpp2_is_xlg(port->phy_interface)) 4567 mvpp2_xlg_max_rx_size_set(port); 4568 else 4569 mvpp2_gmac_max_rx_size_set(port); 4570 } 4571 4572 /* Set hw internals when starting port */ 4573 static void mvpp2_start_dev(struct mvpp2_port *port) 4574 { 4575 int i; 4576 4577 mvpp2_txp_max_tx_size_set(port); 4578 4579 for (i = 0; i < port->nqvecs; i++) 4580 napi_enable(&port->qvecs[i].napi); 4581 4582 /* Enable interrupts on all threads */ 4583 mvpp2_interrupts_enable(port); 4584 4585 if (port->priv->hw_version >= MVPP22) 4586 mvpp22_mode_reconfigure(port); 4587 4588 if (port->phylink) { 4589 phylink_start(port->phylink); 4590 } else { 4591 mvpp2_acpi_start(port); 4592 } 4593 4594 netif_tx_start_all_queues(port->dev); 4595 4596 clear_bit(0, &port->state); 4597 } 4598 4599 /* Set hw internals when stopping port */ 4600 static void mvpp2_stop_dev(struct mvpp2_port *port) 4601 { 4602 int i; 4603 4604 set_bit(0, &port->state); 4605 4606 /* Disable interrupts on all threads */ 4607 mvpp2_interrupts_disable(port); 4608 4609 for (i = 0; i < port->nqvecs; i++) 4610 napi_disable(&port->qvecs[i].napi); 4611 4612 if (port->phylink) 4613 phylink_stop(port->phylink); 4614 phy_power_off(port->comphy); 4615 } 4616 4617 static int mvpp2_check_ringparam_valid(struct net_device *dev, 4618 struct ethtool_ringparam *ring) 4619 { 4620 u16 new_rx_pending = ring->rx_pending; 4621 u16 new_tx_pending = ring->tx_pending; 4622 4623 if (ring->rx_pending == 0 || ring->tx_pending == 0) 4624 return -EINVAL; 4625 4626 if (ring->rx_pending > MVPP2_MAX_RXD_MAX) 4627 new_rx_pending = MVPP2_MAX_RXD_MAX; 4628 else if (ring->rx_pending < MSS_THRESHOLD_START) 4629 new_rx_pending = MSS_THRESHOLD_START; 4630 else if (!IS_ALIGNED(ring->rx_pending, 16)) 4631 new_rx_pending = ALIGN(ring->rx_pending, 16); 4632 4633 if (ring->tx_pending > MVPP2_MAX_TXD_MAX) 4634 new_tx_pending = MVPP2_MAX_TXD_MAX; 4635 else if (!IS_ALIGNED(ring->tx_pending, 32)) 4636 new_tx_pending = ALIGN(ring->tx_pending, 32); 4637 4638 /* The Tx ring size cannot be smaller than the minimum number of 4639 * descriptors needed for TSO. 4640 */ 4641 if (new_tx_pending < MVPP2_MAX_SKB_DESCS) 4642 new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32); 4643 4644 if (ring->rx_pending != new_rx_pending) { 4645 netdev_info(dev, "illegal Rx ring size value %d, round to %d\n", 4646 ring->rx_pending, new_rx_pending); 4647 ring->rx_pending = new_rx_pending; 4648 } 4649 4650 if (ring->tx_pending != new_tx_pending) { 4651 netdev_info(dev, "illegal Tx ring size value %d, round to %d\n", 4652 ring->tx_pending, new_tx_pending); 4653 ring->tx_pending = new_tx_pending; 4654 } 4655 4656 return 0; 4657 } 4658 4659 static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr) 4660 { 4661 u32 mac_addr_l, mac_addr_m, mac_addr_h; 4662 4663 mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 4664 mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE); 4665 mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH); 4666 addr[0] = (mac_addr_h >> 24) & 0xFF; 4667 addr[1] = (mac_addr_h >> 16) & 0xFF; 4668 addr[2] = (mac_addr_h >> 8) & 0xFF; 4669 addr[3] = mac_addr_h & 0xFF; 4670 addr[4] = mac_addr_m & 0xFF; 4671 addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF; 4672 } 4673 4674 static int mvpp2_irqs_init(struct mvpp2_port *port) 4675 { 4676 int err, i; 4677 4678 for (i = 0; i < port->nqvecs; i++) { 4679 struct mvpp2_queue_vector *qv = port->qvecs + i; 4680 4681 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4682 qv->mask = kzalloc(cpumask_size(), GFP_KERNEL); 4683 if (!qv->mask) { 4684 err = -ENOMEM; 4685 goto err; 4686 } 4687 4688 irq_set_status_flags(qv->irq, IRQ_NO_BALANCING); 4689 } 4690 4691 err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv); 4692 if (err) 4693 goto err; 4694 4695 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4696 unsigned int cpu; 4697 4698 for_each_present_cpu(cpu) { 4699 if (mvpp2_cpu_to_thread(port->priv, cpu) == 4700 qv->sw_thread_id) 4701 cpumask_set_cpu(cpu, qv->mask); 4702 } 4703 4704 irq_set_affinity_hint(qv->irq, qv->mask); 4705 } 4706 } 4707 4708 return 0; 4709 err: 4710 for (i = 0; i < port->nqvecs; i++) { 4711 struct mvpp2_queue_vector *qv = port->qvecs + i; 4712 4713 irq_set_affinity_hint(qv->irq, NULL); 4714 kfree(qv->mask); 4715 qv->mask = NULL; 4716 free_irq(qv->irq, qv); 4717 } 4718 4719 return err; 4720 } 4721 4722 static void mvpp2_irqs_deinit(struct mvpp2_port *port) 4723 { 4724 int i; 4725 4726 for (i = 0; i < port->nqvecs; i++) { 4727 struct mvpp2_queue_vector *qv = port->qvecs + i; 4728 4729 irq_set_affinity_hint(qv->irq, NULL); 4730 kfree(qv->mask); 4731 qv->mask = NULL; 4732 irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING); 4733 free_irq(qv->irq, qv); 4734 } 4735 } 4736 4737 static bool mvpp22_rss_is_supported(struct mvpp2_port *port) 4738 { 4739 return (queue_mode == MVPP2_QDIST_MULTI_MODE) && 4740 !(port->flags & MVPP2_F_LOOPBACK); 4741 } 4742 4743 static int mvpp2_open(struct net_device *dev) 4744 { 4745 struct mvpp2_port *port = netdev_priv(dev); 4746 struct mvpp2 *priv = port->priv; 4747 unsigned char mac_bcast[ETH_ALEN] = { 4748 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 4749 bool valid = false; 4750 int err; 4751 4752 err = mvpp2_prs_mac_da_accept(port, mac_bcast, true); 4753 if (err) { 4754 netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n"); 4755 return err; 4756 } 4757 err = mvpp2_prs_mac_da_accept(port, dev->dev_addr, true); 4758 if (err) { 4759 netdev_err(dev, "mvpp2_prs_mac_da_accept own addr failed\n"); 4760 return err; 4761 } 4762 err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH); 4763 if (err) { 4764 netdev_err(dev, "mvpp2_prs_tag_mode_set failed\n"); 4765 return err; 4766 } 4767 err = mvpp2_prs_def_flow(port); 4768 if (err) { 4769 netdev_err(dev, "mvpp2_prs_def_flow failed\n"); 4770 return err; 4771 } 4772 4773 /* Allocate the Rx/Tx queues */ 4774 err = mvpp2_setup_rxqs(port); 4775 if (err) { 4776 netdev_err(port->dev, "cannot allocate Rx queues\n"); 4777 return err; 4778 } 4779 4780 err = mvpp2_setup_txqs(port); 4781 if (err) { 4782 netdev_err(port->dev, "cannot allocate Tx queues\n"); 4783 goto err_cleanup_rxqs; 4784 } 4785 4786 err = mvpp2_irqs_init(port); 4787 if (err) { 4788 netdev_err(port->dev, "cannot init IRQs\n"); 4789 goto err_cleanup_txqs; 4790 } 4791 4792 if (port->phylink) { 4793 err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0); 4794 if (err) { 4795 netdev_err(port->dev, "could not attach PHY (%d)\n", 4796 err); 4797 goto err_free_irq; 4798 } 4799 4800 valid = true; 4801 } 4802 4803 if (priv->hw_version >= MVPP22 && port->port_irq) { 4804 err = request_irq(port->port_irq, mvpp2_port_isr, 0, 4805 dev->name, port); 4806 if (err) { 4807 netdev_err(port->dev, 4808 "cannot request port link/ptp IRQ %d\n", 4809 port->port_irq); 4810 goto err_free_irq; 4811 } 4812 4813 mvpp22_gop_setup_irq(port); 4814 4815 /* In default link is down */ 4816 netif_carrier_off(port->dev); 4817 4818 valid = true; 4819 } else { 4820 port->port_irq = 0; 4821 } 4822 4823 if (!valid) { 4824 netdev_err(port->dev, 4825 "invalid configuration: no dt or link IRQ"); 4826 err = -ENOENT; 4827 goto err_free_irq; 4828 } 4829 4830 /* Unmask interrupts on all CPUs */ 4831 on_each_cpu(mvpp2_interrupts_unmask, port, 1); 4832 mvpp2_shared_interrupt_mask_unmask(port, false); 4833 4834 mvpp2_start_dev(port); 4835 4836 /* Start hardware statistics gathering */ 4837 queue_delayed_work(priv->stats_queue, &port->stats_work, 4838 MVPP2_MIB_COUNTERS_STATS_DELAY); 4839 4840 return 0; 4841 4842 err_free_irq: 4843 mvpp2_irqs_deinit(port); 4844 err_cleanup_txqs: 4845 mvpp2_cleanup_txqs(port); 4846 err_cleanup_rxqs: 4847 mvpp2_cleanup_rxqs(port); 4848 return err; 4849 } 4850 4851 static int mvpp2_stop(struct net_device *dev) 4852 { 4853 struct mvpp2_port *port = netdev_priv(dev); 4854 struct mvpp2_port_pcpu *port_pcpu; 4855 unsigned int thread; 4856 4857 mvpp2_stop_dev(port); 4858 4859 /* Mask interrupts on all threads */ 4860 on_each_cpu(mvpp2_interrupts_mask, port, 1); 4861 mvpp2_shared_interrupt_mask_unmask(port, true); 4862 4863 if (port->phylink) 4864 phylink_disconnect_phy(port->phylink); 4865 if (port->port_irq) 4866 free_irq(port->port_irq, port); 4867 4868 mvpp2_irqs_deinit(port); 4869 if (!port->has_tx_irqs) { 4870 for (thread = 0; thread < port->priv->nthreads; thread++) { 4871 port_pcpu = per_cpu_ptr(port->pcpu, thread); 4872 4873 hrtimer_cancel(&port_pcpu->tx_done_timer); 4874 port_pcpu->timer_scheduled = false; 4875 } 4876 } 4877 mvpp2_cleanup_rxqs(port); 4878 mvpp2_cleanup_txqs(port); 4879 4880 cancel_delayed_work_sync(&port->stats_work); 4881 4882 mvpp2_mac_reset_assert(port); 4883 mvpp22_pcs_reset_assert(port); 4884 4885 return 0; 4886 } 4887 4888 static int mvpp2_prs_mac_da_accept_list(struct mvpp2_port *port, 4889 struct netdev_hw_addr_list *list) 4890 { 4891 struct netdev_hw_addr *ha; 4892 int ret; 4893 4894 netdev_hw_addr_list_for_each(ha, list) { 4895 ret = mvpp2_prs_mac_da_accept(port, ha->addr, true); 4896 if (ret) 4897 return ret; 4898 } 4899 4900 return 0; 4901 } 4902 4903 static void mvpp2_set_rx_promisc(struct mvpp2_port *port, bool enable) 4904 { 4905 if (!enable && (port->dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 4906 mvpp2_prs_vid_enable_filtering(port); 4907 else 4908 mvpp2_prs_vid_disable_filtering(port); 4909 4910 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4911 MVPP2_PRS_L2_UNI_CAST, enable); 4912 4913 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4914 MVPP2_PRS_L2_MULTI_CAST, enable); 4915 } 4916 4917 static void mvpp2_set_rx_mode(struct net_device *dev) 4918 { 4919 struct mvpp2_port *port = netdev_priv(dev); 4920 4921 /* Clear the whole UC and MC list */ 4922 mvpp2_prs_mac_del_all(port); 4923 4924 if (dev->flags & IFF_PROMISC) { 4925 mvpp2_set_rx_promisc(port, true); 4926 return; 4927 } 4928 4929 mvpp2_set_rx_promisc(port, false); 4930 4931 if (netdev_uc_count(dev) > MVPP2_PRS_MAC_UC_FILT_MAX || 4932 mvpp2_prs_mac_da_accept_list(port, &dev->uc)) 4933 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4934 MVPP2_PRS_L2_UNI_CAST, true); 4935 4936 if (dev->flags & IFF_ALLMULTI) { 4937 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4938 MVPP2_PRS_L2_MULTI_CAST, true); 4939 return; 4940 } 4941 4942 if (netdev_mc_count(dev) > MVPP2_PRS_MAC_MC_FILT_MAX || 4943 mvpp2_prs_mac_da_accept_list(port, &dev->mc)) 4944 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4945 MVPP2_PRS_L2_MULTI_CAST, true); 4946 } 4947 4948 static int mvpp2_set_mac_address(struct net_device *dev, void *p) 4949 { 4950 const struct sockaddr *addr = p; 4951 int err; 4952 4953 if (!is_valid_ether_addr(addr->sa_data)) 4954 return -EADDRNOTAVAIL; 4955 4956 err = mvpp2_prs_update_mac_da(dev, addr->sa_data); 4957 if (err) { 4958 /* Reconfigure parser accept the original MAC address */ 4959 mvpp2_prs_update_mac_da(dev, dev->dev_addr); 4960 netdev_err(dev, "failed to change MAC address\n"); 4961 } 4962 return err; 4963 } 4964 4965 /* Shut down all the ports, reconfigure the pools as percpu or shared, 4966 * then bring up again all ports. 4967 */ 4968 static int mvpp2_bm_switch_buffers(struct mvpp2 *priv, bool percpu) 4969 { 4970 bool change_percpu = (percpu != priv->percpu_pools); 4971 int numbufs = MVPP2_BM_POOLS_NUM, i; 4972 struct mvpp2_port *port = NULL; 4973 bool status[MVPP2_MAX_PORTS]; 4974 4975 for (i = 0; i < priv->port_count; i++) { 4976 port = priv->port_list[i]; 4977 status[i] = netif_running(port->dev); 4978 if (status[i]) 4979 mvpp2_stop(port->dev); 4980 } 4981 4982 /* nrxqs is the same for all ports */ 4983 if (priv->percpu_pools) 4984 numbufs = port->nrxqs * 2; 4985 4986 if (change_percpu) 4987 mvpp2_bm_pool_update_priv_fc(priv, false); 4988 4989 for (i = 0; i < numbufs; i++) 4990 mvpp2_bm_pool_destroy(port->dev->dev.parent, priv, &priv->bm_pools[i]); 4991 4992 devm_kfree(port->dev->dev.parent, priv->bm_pools); 4993 priv->percpu_pools = percpu; 4994 mvpp2_bm_init(port->dev->dev.parent, priv); 4995 4996 for (i = 0; i < priv->port_count; i++) { 4997 port = priv->port_list[i]; 4998 mvpp2_swf_bm_pool_init(port); 4999 if (status[i]) 5000 mvpp2_open(port->dev); 5001 } 5002 5003 if (change_percpu) 5004 mvpp2_bm_pool_update_priv_fc(priv, true); 5005 5006 return 0; 5007 } 5008 5009 static int mvpp2_change_mtu(struct net_device *dev, int mtu) 5010 { 5011 struct mvpp2_port *port = netdev_priv(dev); 5012 bool running = netif_running(dev); 5013 struct mvpp2 *priv = port->priv; 5014 int err; 5015 5016 if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) { 5017 netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu, 5018 ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8)); 5019 mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8); 5020 } 5021 5022 if (MVPP2_RX_PKT_SIZE(mtu) > MVPP2_BM_LONG_PKT_SIZE) { 5023 if (port->xdp_prog) { 5024 netdev_err(dev, "Jumbo frames are not supported with XDP\n"); 5025 return -EINVAL; 5026 } 5027 if (priv->percpu_pools) { 5028 netdev_warn(dev, "mtu %d too high, switching to shared buffers", mtu); 5029 mvpp2_bm_switch_buffers(priv, false); 5030 } 5031 } else { 5032 bool jumbo = false; 5033 int i; 5034 5035 for (i = 0; i < priv->port_count; i++) 5036 if (priv->port_list[i] != port && 5037 MVPP2_RX_PKT_SIZE(priv->port_list[i]->dev->mtu) > 5038 MVPP2_BM_LONG_PKT_SIZE) { 5039 jumbo = true; 5040 break; 5041 } 5042 5043 /* No port is using jumbo frames */ 5044 if (!jumbo) { 5045 dev_info(port->dev->dev.parent, 5046 "all ports have a low MTU, switching to per-cpu buffers"); 5047 mvpp2_bm_switch_buffers(priv, true); 5048 } 5049 } 5050 5051 if (running) 5052 mvpp2_stop_dev(port); 5053 5054 err = mvpp2_bm_update_mtu(dev, mtu); 5055 if (err) { 5056 netdev_err(dev, "failed to change MTU\n"); 5057 /* Reconfigure BM to the original MTU */ 5058 mvpp2_bm_update_mtu(dev, dev->mtu); 5059 } else { 5060 port->pkt_size = MVPP2_RX_PKT_SIZE(mtu); 5061 } 5062 5063 if (running) { 5064 mvpp2_start_dev(port); 5065 mvpp2_egress_enable(port); 5066 mvpp2_ingress_enable(port); 5067 } 5068 5069 return err; 5070 } 5071 5072 static int mvpp2_check_pagepool_dma(struct mvpp2_port *port) 5073 { 5074 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 5075 struct mvpp2 *priv = port->priv; 5076 int err = -1, i; 5077 5078 if (!priv->percpu_pools) 5079 return err; 5080 5081 if (!priv->page_pool[0]) 5082 return -ENOMEM; 5083 5084 for (i = 0; i < priv->port_count; i++) { 5085 port = priv->port_list[i]; 5086 if (port->xdp_prog) { 5087 dma_dir = DMA_BIDIRECTIONAL; 5088 break; 5089 } 5090 } 5091 5092 /* All pools are equal in terms of DMA direction */ 5093 if (priv->page_pool[0]->p.dma_dir != dma_dir) 5094 err = mvpp2_bm_switch_buffers(priv, true); 5095 5096 return err; 5097 } 5098 5099 static void 5100 mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 5101 { 5102 struct mvpp2_port *port = netdev_priv(dev); 5103 unsigned int start; 5104 unsigned int cpu; 5105 5106 for_each_possible_cpu(cpu) { 5107 struct mvpp2_pcpu_stats *cpu_stats; 5108 u64 rx_packets; 5109 u64 rx_bytes; 5110 u64 tx_packets; 5111 u64 tx_bytes; 5112 5113 cpu_stats = per_cpu_ptr(port->stats, cpu); 5114 do { 5115 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 5116 rx_packets = cpu_stats->rx_packets; 5117 rx_bytes = cpu_stats->rx_bytes; 5118 tx_packets = cpu_stats->tx_packets; 5119 tx_bytes = cpu_stats->tx_bytes; 5120 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 5121 5122 stats->rx_packets += rx_packets; 5123 stats->rx_bytes += rx_bytes; 5124 stats->tx_packets += tx_packets; 5125 stats->tx_bytes += tx_bytes; 5126 } 5127 5128 stats->rx_errors = dev->stats.rx_errors; 5129 stats->rx_dropped = dev->stats.rx_dropped; 5130 stats->tx_dropped = dev->stats.tx_dropped; 5131 } 5132 5133 static int mvpp2_set_ts_config(struct mvpp2_port *port, struct ifreq *ifr) 5134 { 5135 struct hwtstamp_config config; 5136 void __iomem *ptp; 5137 u32 gcr, int_mask; 5138 5139 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 5140 return -EFAULT; 5141 5142 if (config.flags) 5143 return -EINVAL; 5144 5145 if (config.tx_type != HWTSTAMP_TX_OFF && 5146 config.tx_type != HWTSTAMP_TX_ON) 5147 return -ERANGE; 5148 5149 ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 5150 5151 int_mask = gcr = 0; 5152 if (config.tx_type != HWTSTAMP_TX_OFF) { 5153 gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_TX_RESET; 5154 int_mask |= MVPP22_PTP_INT_MASK_QUEUE1 | 5155 MVPP22_PTP_INT_MASK_QUEUE0; 5156 } 5157 5158 /* It seems we must also release the TX reset when enabling the TSU */ 5159 if (config.rx_filter != HWTSTAMP_FILTER_NONE) 5160 gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_RX_RESET | 5161 MVPP22_PTP_GCR_TX_RESET; 5162 5163 if (gcr & MVPP22_PTP_GCR_TSU_ENABLE) 5164 mvpp22_tai_start(port->priv->tai); 5165 5166 if (config.rx_filter != HWTSTAMP_FILTER_NONE) { 5167 config.rx_filter = HWTSTAMP_FILTER_ALL; 5168 mvpp2_modify(ptp + MVPP22_PTP_GCR, 5169 MVPP22_PTP_GCR_RX_RESET | 5170 MVPP22_PTP_GCR_TX_RESET | 5171 MVPP22_PTP_GCR_TSU_ENABLE, gcr); 5172 port->rx_hwtstamp = true; 5173 } else { 5174 port->rx_hwtstamp = false; 5175 mvpp2_modify(ptp + MVPP22_PTP_GCR, 5176 MVPP22_PTP_GCR_RX_RESET | 5177 MVPP22_PTP_GCR_TX_RESET | 5178 MVPP22_PTP_GCR_TSU_ENABLE, gcr); 5179 } 5180 5181 mvpp2_modify(ptp + MVPP22_PTP_INT_MASK, 5182 MVPP22_PTP_INT_MASK_QUEUE1 | 5183 MVPP22_PTP_INT_MASK_QUEUE0, int_mask); 5184 5185 if (!(gcr & MVPP22_PTP_GCR_TSU_ENABLE)) 5186 mvpp22_tai_stop(port->priv->tai); 5187 5188 port->tx_hwtstamp_type = config.tx_type; 5189 5190 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 5191 return -EFAULT; 5192 5193 return 0; 5194 } 5195 5196 static int mvpp2_get_ts_config(struct mvpp2_port *port, struct ifreq *ifr) 5197 { 5198 struct hwtstamp_config config; 5199 5200 memset(&config, 0, sizeof(config)); 5201 5202 config.tx_type = port->tx_hwtstamp_type; 5203 config.rx_filter = port->rx_hwtstamp ? 5204 HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE; 5205 5206 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 5207 return -EFAULT; 5208 5209 return 0; 5210 } 5211 5212 static int mvpp2_ethtool_get_ts_info(struct net_device *dev, 5213 struct ethtool_ts_info *info) 5214 { 5215 struct mvpp2_port *port = netdev_priv(dev); 5216 5217 if (!port->hwtstamp) 5218 return -EOPNOTSUPP; 5219 5220 info->phc_index = mvpp22_tai_ptp_clock_index(port->priv->tai); 5221 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | 5222 SOF_TIMESTAMPING_RX_SOFTWARE | 5223 SOF_TIMESTAMPING_SOFTWARE | 5224 SOF_TIMESTAMPING_TX_HARDWARE | 5225 SOF_TIMESTAMPING_RX_HARDWARE | 5226 SOF_TIMESTAMPING_RAW_HARDWARE; 5227 info->tx_types = BIT(HWTSTAMP_TX_OFF) | 5228 BIT(HWTSTAMP_TX_ON); 5229 info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | 5230 BIT(HWTSTAMP_FILTER_ALL); 5231 5232 return 0; 5233 } 5234 5235 static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 5236 { 5237 struct mvpp2_port *port = netdev_priv(dev); 5238 5239 switch (cmd) { 5240 case SIOCSHWTSTAMP: 5241 if (port->hwtstamp) 5242 return mvpp2_set_ts_config(port, ifr); 5243 break; 5244 5245 case SIOCGHWTSTAMP: 5246 if (port->hwtstamp) 5247 return mvpp2_get_ts_config(port, ifr); 5248 break; 5249 } 5250 5251 if (!port->phylink) 5252 return -ENOTSUPP; 5253 5254 return phylink_mii_ioctl(port->phylink, ifr, cmd); 5255 } 5256 5257 static int mvpp2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 5258 { 5259 struct mvpp2_port *port = netdev_priv(dev); 5260 int ret; 5261 5262 ret = mvpp2_prs_vid_entry_add(port, vid); 5263 if (ret) 5264 netdev_err(dev, "rx-vlan-filter offloading cannot accept more than %d VIDs per port\n", 5265 MVPP2_PRS_VLAN_FILT_MAX - 1); 5266 return ret; 5267 } 5268 5269 static int mvpp2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 5270 { 5271 struct mvpp2_port *port = netdev_priv(dev); 5272 5273 mvpp2_prs_vid_entry_remove(port, vid); 5274 return 0; 5275 } 5276 5277 static int mvpp2_set_features(struct net_device *dev, 5278 netdev_features_t features) 5279 { 5280 netdev_features_t changed = dev->features ^ features; 5281 struct mvpp2_port *port = netdev_priv(dev); 5282 5283 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { 5284 if (features & NETIF_F_HW_VLAN_CTAG_FILTER) { 5285 mvpp2_prs_vid_enable_filtering(port); 5286 } else { 5287 /* Invalidate all registered VID filters for this 5288 * port 5289 */ 5290 mvpp2_prs_vid_remove_all(port); 5291 5292 mvpp2_prs_vid_disable_filtering(port); 5293 } 5294 } 5295 5296 if (changed & NETIF_F_RXHASH) { 5297 if (features & NETIF_F_RXHASH) 5298 mvpp22_port_rss_enable(port); 5299 else 5300 mvpp22_port_rss_disable(port); 5301 } 5302 5303 return 0; 5304 } 5305 5306 static int mvpp2_xdp_setup(struct mvpp2_port *port, struct netdev_bpf *bpf) 5307 { 5308 struct bpf_prog *prog = bpf->prog, *old_prog; 5309 bool running = netif_running(port->dev); 5310 bool reset = !prog != !port->xdp_prog; 5311 5312 if (port->dev->mtu > ETH_DATA_LEN) { 5313 NL_SET_ERR_MSG_MOD(bpf->extack, "XDP is not supported with jumbo frames enabled"); 5314 return -EOPNOTSUPP; 5315 } 5316 5317 if (!port->priv->percpu_pools) { 5318 NL_SET_ERR_MSG_MOD(bpf->extack, "Per CPU Pools required for XDP"); 5319 return -EOPNOTSUPP; 5320 } 5321 5322 if (port->ntxqs < num_possible_cpus() * 2) { 5323 NL_SET_ERR_MSG_MOD(bpf->extack, "XDP_TX needs two TX queues per CPU"); 5324 return -EOPNOTSUPP; 5325 } 5326 5327 /* device is up and bpf is added/removed, must setup the RX queues */ 5328 if (running && reset) 5329 mvpp2_stop(port->dev); 5330 5331 old_prog = xchg(&port->xdp_prog, prog); 5332 if (old_prog) 5333 bpf_prog_put(old_prog); 5334 5335 /* bpf is just replaced, RXQ and MTU are already setup */ 5336 if (!reset) 5337 return 0; 5338 5339 /* device was up, restore the link */ 5340 if (running) 5341 mvpp2_open(port->dev); 5342 5343 /* Check Page Pool DMA Direction */ 5344 mvpp2_check_pagepool_dma(port); 5345 5346 return 0; 5347 } 5348 5349 static int mvpp2_xdp(struct net_device *dev, struct netdev_bpf *xdp) 5350 { 5351 struct mvpp2_port *port = netdev_priv(dev); 5352 5353 switch (xdp->command) { 5354 case XDP_SETUP_PROG: 5355 return mvpp2_xdp_setup(port, xdp); 5356 default: 5357 return -EINVAL; 5358 } 5359 } 5360 5361 /* Ethtool methods */ 5362 5363 static int mvpp2_ethtool_nway_reset(struct net_device *dev) 5364 { 5365 struct mvpp2_port *port = netdev_priv(dev); 5366 5367 if (!port->phylink) 5368 return -ENOTSUPP; 5369 5370 return phylink_ethtool_nway_reset(port->phylink); 5371 } 5372 5373 /* Set interrupt coalescing for ethtools */ 5374 static int mvpp2_ethtool_set_coalesce(struct net_device *dev, 5375 struct ethtool_coalesce *c) 5376 { 5377 struct mvpp2_port *port = netdev_priv(dev); 5378 int queue; 5379 5380 for (queue = 0; queue < port->nrxqs; queue++) { 5381 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 5382 5383 rxq->time_coal = c->rx_coalesce_usecs; 5384 rxq->pkts_coal = c->rx_max_coalesced_frames; 5385 mvpp2_rx_pkts_coal_set(port, rxq); 5386 mvpp2_rx_time_coal_set(port, rxq); 5387 } 5388 5389 if (port->has_tx_irqs) { 5390 port->tx_time_coal = c->tx_coalesce_usecs; 5391 mvpp2_tx_time_coal_set(port); 5392 } 5393 5394 for (queue = 0; queue < port->ntxqs; queue++) { 5395 struct mvpp2_tx_queue *txq = port->txqs[queue]; 5396 5397 txq->done_pkts_coal = c->tx_max_coalesced_frames; 5398 5399 if (port->has_tx_irqs) 5400 mvpp2_tx_pkts_coal_set(port, txq); 5401 } 5402 5403 return 0; 5404 } 5405 5406 /* get coalescing for ethtools */ 5407 static int mvpp2_ethtool_get_coalesce(struct net_device *dev, 5408 struct ethtool_coalesce *c) 5409 { 5410 struct mvpp2_port *port = netdev_priv(dev); 5411 5412 c->rx_coalesce_usecs = port->rxqs[0]->time_coal; 5413 c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal; 5414 c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal; 5415 c->tx_coalesce_usecs = port->tx_time_coal; 5416 return 0; 5417 } 5418 5419 static void mvpp2_ethtool_get_drvinfo(struct net_device *dev, 5420 struct ethtool_drvinfo *drvinfo) 5421 { 5422 strlcpy(drvinfo->driver, MVPP2_DRIVER_NAME, 5423 sizeof(drvinfo->driver)); 5424 strlcpy(drvinfo->version, MVPP2_DRIVER_VERSION, 5425 sizeof(drvinfo->version)); 5426 strlcpy(drvinfo->bus_info, dev_name(&dev->dev), 5427 sizeof(drvinfo->bus_info)); 5428 } 5429 5430 static void mvpp2_ethtool_get_ringparam(struct net_device *dev, 5431 struct ethtool_ringparam *ring) 5432 { 5433 struct mvpp2_port *port = netdev_priv(dev); 5434 5435 ring->rx_max_pending = MVPP2_MAX_RXD_MAX; 5436 ring->tx_max_pending = MVPP2_MAX_TXD_MAX; 5437 ring->rx_pending = port->rx_ring_size; 5438 ring->tx_pending = port->tx_ring_size; 5439 } 5440 5441 static int mvpp2_ethtool_set_ringparam(struct net_device *dev, 5442 struct ethtool_ringparam *ring) 5443 { 5444 struct mvpp2_port *port = netdev_priv(dev); 5445 u16 prev_rx_ring_size = port->rx_ring_size; 5446 u16 prev_tx_ring_size = port->tx_ring_size; 5447 int err; 5448 5449 err = mvpp2_check_ringparam_valid(dev, ring); 5450 if (err) 5451 return err; 5452 5453 if (!netif_running(dev)) { 5454 port->rx_ring_size = ring->rx_pending; 5455 port->tx_ring_size = ring->tx_pending; 5456 return 0; 5457 } 5458 5459 /* The interface is running, so we have to force a 5460 * reallocation of the queues 5461 */ 5462 mvpp2_stop_dev(port); 5463 mvpp2_cleanup_rxqs(port); 5464 mvpp2_cleanup_txqs(port); 5465 5466 port->rx_ring_size = ring->rx_pending; 5467 port->tx_ring_size = ring->tx_pending; 5468 5469 err = mvpp2_setup_rxqs(port); 5470 if (err) { 5471 /* Reallocate Rx queues with the original ring size */ 5472 port->rx_ring_size = prev_rx_ring_size; 5473 ring->rx_pending = prev_rx_ring_size; 5474 err = mvpp2_setup_rxqs(port); 5475 if (err) 5476 goto err_out; 5477 } 5478 err = mvpp2_setup_txqs(port); 5479 if (err) { 5480 /* Reallocate Tx queues with the original ring size */ 5481 port->tx_ring_size = prev_tx_ring_size; 5482 ring->tx_pending = prev_tx_ring_size; 5483 err = mvpp2_setup_txqs(port); 5484 if (err) 5485 goto err_clean_rxqs; 5486 } 5487 5488 mvpp2_start_dev(port); 5489 mvpp2_egress_enable(port); 5490 mvpp2_ingress_enable(port); 5491 5492 return 0; 5493 5494 err_clean_rxqs: 5495 mvpp2_cleanup_rxqs(port); 5496 err_out: 5497 netdev_err(dev, "failed to change ring parameters"); 5498 return err; 5499 } 5500 5501 static void mvpp2_ethtool_get_pause_param(struct net_device *dev, 5502 struct ethtool_pauseparam *pause) 5503 { 5504 struct mvpp2_port *port = netdev_priv(dev); 5505 5506 if (!port->phylink) 5507 return; 5508 5509 phylink_ethtool_get_pauseparam(port->phylink, pause); 5510 } 5511 5512 static int mvpp2_ethtool_set_pause_param(struct net_device *dev, 5513 struct ethtool_pauseparam *pause) 5514 { 5515 struct mvpp2_port *port = netdev_priv(dev); 5516 5517 if (!port->phylink) 5518 return -ENOTSUPP; 5519 5520 return phylink_ethtool_set_pauseparam(port->phylink, pause); 5521 } 5522 5523 static int mvpp2_ethtool_get_link_ksettings(struct net_device *dev, 5524 struct ethtool_link_ksettings *cmd) 5525 { 5526 struct mvpp2_port *port = netdev_priv(dev); 5527 5528 if (!port->phylink) 5529 return -ENOTSUPP; 5530 5531 return phylink_ethtool_ksettings_get(port->phylink, cmd); 5532 } 5533 5534 static int mvpp2_ethtool_set_link_ksettings(struct net_device *dev, 5535 const struct ethtool_link_ksettings *cmd) 5536 { 5537 struct mvpp2_port *port = netdev_priv(dev); 5538 5539 if (!port->phylink) 5540 return -ENOTSUPP; 5541 5542 return phylink_ethtool_ksettings_set(port->phylink, cmd); 5543 } 5544 5545 static int mvpp2_ethtool_get_rxnfc(struct net_device *dev, 5546 struct ethtool_rxnfc *info, u32 *rules) 5547 { 5548 struct mvpp2_port *port = netdev_priv(dev); 5549 int ret = 0, i, loc = 0; 5550 5551 if (!mvpp22_rss_is_supported(port)) 5552 return -EOPNOTSUPP; 5553 5554 switch (info->cmd) { 5555 case ETHTOOL_GRXFH: 5556 ret = mvpp2_ethtool_rxfh_get(port, info); 5557 break; 5558 case ETHTOOL_GRXRINGS: 5559 info->data = port->nrxqs; 5560 break; 5561 case ETHTOOL_GRXCLSRLCNT: 5562 info->rule_cnt = port->n_rfs_rules; 5563 break; 5564 case ETHTOOL_GRXCLSRULE: 5565 ret = mvpp2_ethtool_cls_rule_get(port, info); 5566 break; 5567 case ETHTOOL_GRXCLSRLALL: 5568 for (i = 0; i < MVPP2_N_RFS_ENTRIES_PER_FLOW; i++) { 5569 if (port->rfs_rules[i]) 5570 rules[loc++] = i; 5571 } 5572 break; 5573 default: 5574 return -ENOTSUPP; 5575 } 5576 5577 return ret; 5578 } 5579 5580 static int mvpp2_ethtool_set_rxnfc(struct net_device *dev, 5581 struct ethtool_rxnfc *info) 5582 { 5583 struct mvpp2_port *port = netdev_priv(dev); 5584 int ret = 0; 5585 5586 if (!mvpp22_rss_is_supported(port)) 5587 return -EOPNOTSUPP; 5588 5589 switch (info->cmd) { 5590 case ETHTOOL_SRXFH: 5591 ret = mvpp2_ethtool_rxfh_set(port, info); 5592 break; 5593 case ETHTOOL_SRXCLSRLINS: 5594 ret = mvpp2_ethtool_cls_rule_ins(port, info); 5595 break; 5596 case ETHTOOL_SRXCLSRLDEL: 5597 ret = mvpp2_ethtool_cls_rule_del(port, info); 5598 break; 5599 default: 5600 return -EOPNOTSUPP; 5601 } 5602 return ret; 5603 } 5604 5605 static u32 mvpp2_ethtool_get_rxfh_indir_size(struct net_device *dev) 5606 { 5607 struct mvpp2_port *port = netdev_priv(dev); 5608 5609 return mvpp22_rss_is_supported(port) ? MVPP22_RSS_TABLE_ENTRIES : 0; 5610 } 5611 5612 static int mvpp2_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, 5613 u8 *hfunc) 5614 { 5615 struct mvpp2_port *port = netdev_priv(dev); 5616 int ret = 0; 5617 5618 if (!mvpp22_rss_is_supported(port)) 5619 return -EOPNOTSUPP; 5620 5621 if (indir) 5622 ret = mvpp22_port_rss_ctx_indir_get(port, 0, indir); 5623 5624 if (hfunc) 5625 *hfunc = ETH_RSS_HASH_CRC32; 5626 5627 return ret; 5628 } 5629 5630 static int mvpp2_ethtool_set_rxfh(struct net_device *dev, const u32 *indir, 5631 const u8 *key, const u8 hfunc) 5632 { 5633 struct mvpp2_port *port = netdev_priv(dev); 5634 int ret = 0; 5635 5636 if (!mvpp22_rss_is_supported(port)) 5637 return -EOPNOTSUPP; 5638 5639 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32) 5640 return -EOPNOTSUPP; 5641 5642 if (key) 5643 return -EOPNOTSUPP; 5644 5645 if (indir) 5646 ret = mvpp22_port_rss_ctx_indir_set(port, 0, indir); 5647 5648 return ret; 5649 } 5650 5651 static int mvpp2_ethtool_get_rxfh_context(struct net_device *dev, u32 *indir, 5652 u8 *key, u8 *hfunc, u32 rss_context) 5653 { 5654 struct mvpp2_port *port = netdev_priv(dev); 5655 int ret = 0; 5656 5657 if (!mvpp22_rss_is_supported(port)) 5658 return -EOPNOTSUPP; 5659 if (rss_context >= MVPP22_N_RSS_TABLES) 5660 return -EINVAL; 5661 5662 if (hfunc) 5663 *hfunc = ETH_RSS_HASH_CRC32; 5664 5665 if (indir) 5666 ret = mvpp22_port_rss_ctx_indir_get(port, rss_context, indir); 5667 5668 return ret; 5669 } 5670 5671 static int mvpp2_ethtool_set_rxfh_context(struct net_device *dev, 5672 const u32 *indir, const u8 *key, 5673 const u8 hfunc, u32 *rss_context, 5674 bool delete) 5675 { 5676 struct mvpp2_port *port = netdev_priv(dev); 5677 int ret; 5678 5679 if (!mvpp22_rss_is_supported(port)) 5680 return -EOPNOTSUPP; 5681 5682 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32) 5683 return -EOPNOTSUPP; 5684 5685 if (key) 5686 return -EOPNOTSUPP; 5687 5688 if (delete) 5689 return mvpp22_port_rss_ctx_delete(port, *rss_context); 5690 5691 if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) { 5692 ret = mvpp22_port_rss_ctx_create(port, rss_context); 5693 if (ret) 5694 return ret; 5695 } 5696 5697 return mvpp22_port_rss_ctx_indir_set(port, *rss_context, indir); 5698 } 5699 /* Device ops */ 5700 5701 static const struct net_device_ops mvpp2_netdev_ops = { 5702 .ndo_open = mvpp2_open, 5703 .ndo_stop = mvpp2_stop, 5704 .ndo_start_xmit = mvpp2_tx, 5705 .ndo_set_rx_mode = mvpp2_set_rx_mode, 5706 .ndo_set_mac_address = mvpp2_set_mac_address, 5707 .ndo_change_mtu = mvpp2_change_mtu, 5708 .ndo_get_stats64 = mvpp2_get_stats64, 5709 .ndo_do_ioctl = mvpp2_ioctl, 5710 .ndo_vlan_rx_add_vid = mvpp2_vlan_rx_add_vid, 5711 .ndo_vlan_rx_kill_vid = mvpp2_vlan_rx_kill_vid, 5712 .ndo_set_features = mvpp2_set_features, 5713 .ndo_bpf = mvpp2_xdp, 5714 .ndo_xdp_xmit = mvpp2_xdp_xmit, 5715 }; 5716 5717 static const struct ethtool_ops mvpp2_eth_tool_ops = { 5718 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 5719 ETHTOOL_COALESCE_MAX_FRAMES, 5720 .nway_reset = mvpp2_ethtool_nway_reset, 5721 .get_link = ethtool_op_get_link, 5722 .get_ts_info = mvpp2_ethtool_get_ts_info, 5723 .set_coalesce = mvpp2_ethtool_set_coalesce, 5724 .get_coalesce = mvpp2_ethtool_get_coalesce, 5725 .get_drvinfo = mvpp2_ethtool_get_drvinfo, 5726 .get_ringparam = mvpp2_ethtool_get_ringparam, 5727 .set_ringparam = mvpp2_ethtool_set_ringparam, 5728 .get_strings = mvpp2_ethtool_get_strings, 5729 .get_ethtool_stats = mvpp2_ethtool_get_stats, 5730 .get_sset_count = mvpp2_ethtool_get_sset_count, 5731 .get_pauseparam = mvpp2_ethtool_get_pause_param, 5732 .set_pauseparam = mvpp2_ethtool_set_pause_param, 5733 .get_link_ksettings = mvpp2_ethtool_get_link_ksettings, 5734 .set_link_ksettings = mvpp2_ethtool_set_link_ksettings, 5735 .get_rxnfc = mvpp2_ethtool_get_rxnfc, 5736 .set_rxnfc = mvpp2_ethtool_set_rxnfc, 5737 .get_rxfh_indir_size = mvpp2_ethtool_get_rxfh_indir_size, 5738 .get_rxfh = mvpp2_ethtool_get_rxfh, 5739 .set_rxfh = mvpp2_ethtool_set_rxfh, 5740 .get_rxfh_context = mvpp2_ethtool_get_rxfh_context, 5741 .set_rxfh_context = mvpp2_ethtool_set_rxfh_context, 5742 }; 5743 5744 /* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that 5745 * had a single IRQ defined per-port. 5746 */ 5747 static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port, 5748 struct device_node *port_node) 5749 { 5750 struct mvpp2_queue_vector *v = &port->qvecs[0]; 5751 5752 v->first_rxq = 0; 5753 v->nrxqs = port->nrxqs; 5754 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5755 v->sw_thread_id = 0; 5756 v->sw_thread_mask = *cpumask_bits(cpu_online_mask); 5757 v->port = port; 5758 v->irq = irq_of_parse_and_map(port_node, 0); 5759 if (v->irq <= 0) 5760 return -EINVAL; 5761 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 5762 NAPI_POLL_WEIGHT); 5763 5764 port->nqvecs = 1; 5765 5766 return 0; 5767 } 5768 5769 static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port, 5770 struct device_node *port_node) 5771 { 5772 struct mvpp2 *priv = port->priv; 5773 struct mvpp2_queue_vector *v; 5774 int i, ret; 5775 5776 switch (queue_mode) { 5777 case MVPP2_QDIST_SINGLE_MODE: 5778 port->nqvecs = priv->nthreads + 1; 5779 break; 5780 case MVPP2_QDIST_MULTI_MODE: 5781 port->nqvecs = priv->nthreads; 5782 break; 5783 } 5784 5785 for (i = 0; i < port->nqvecs; i++) { 5786 char irqname[16]; 5787 5788 v = port->qvecs + i; 5789 5790 v->port = port; 5791 v->type = MVPP2_QUEUE_VECTOR_PRIVATE; 5792 v->sw_thread_id = i; 5793 v->sw_thread_mask = BIT(i); 5794 5795 if (port->flags & MVPP2_F_DT_COMPAT) 5796 snprintf(irqname, sizeof(irqname), "tx-cpu%d", i); 5797 else 5798 snprintf(irqname, sizeof(irqname), "hif%d", i); 5799 5800 if (queue_mode == MVPP2_QDIST_MULTI_MODE) { 5801 v->first_rxq = i; 5802 v->nrxqs = 1; 5803 } else if (queue_mode == MVPP2_QDIST_SINGLE_MODE && 5804 i == (port->nqvecs - 1)) { 5805 v->first_rxq = 0; 5806 v->nrxqs = port->nrxqs; 5807 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5808 5809 if (port->flags & MVPP2_F_DT_COMPAT) 5810 strncpy(irqname, "rx-shared", sizeof(irqname)); 5811 } 5812 5813 if (port_node) 5814 v->irq = of_irq_get_byname(port_node, irqname); 5815 else 5816 v->irq = fwnode_irq_get(port->fwnode, i); 5817 if (v->irq <= 0) { 5818 ret = -EINVAL; 5819 goto err; 5820 } 5821 5822 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 5823 NAPI_POLL_WEIGHT); 5824 } 5825 5826 return 0; 5827 5828 err: 5829 for (i = 0; i < port->nqvecs; i++) 5830 irq_dispose_mapping(port->qvecs[i].irq); 5831 return ret; 5832 } 5833 5834 static int mvpp2_queue_vectors_init(struct mvpp2_port *port, 5835 struct device_node *port_node) 5836 { 5837 if (port->has_tx_irqs) 5838 return mvpp2_multi_queue_vectors_init(port, port_node); 5839 else 5840 return mvpp2_simple_queue_vectors_init(port, port_node); 5841 } 5842 5843 static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port) 5844 { 5845 int i; 5846 5847 for (i = 0; i < port->nqvecs; i++) 5848 irq_dispose_mapping(port->qvecs[i].irq); 5849 } 5850 5851 /* Configure Rx queue group interrupt for this port */ 5852 static void mvpp2_rx_irqs_setup(struct mvpp2_port *port) 5853 { 5854 struct mvpp2 *priv = port->priv; 5855 u32 val; 5856 int i; 5857 5858 if (priv->hw_version == MVPP21) { 5859 mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id), 5860 port->nrxqs); 5861 return; 5862 } 5863 5864 /* Handle the more complicated PPv2.2 and PPv2.3 case */ 5865 for (i = 0; i < port->nqvecs; i++) { 5866 struct mvpp2_queue_vector *qv = port->qvecs + i; 5867 5868 if (!qv->nrxqs) 5869 continue; 5870 5871 val = qv->sw_thread_id; 5872 val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET; 5873 mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val); 5874 5875 val = qv->first_rxq; 5876 val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET; 5877 mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val); 5878 } 5879 } 5880 5881 /* Initialize port HW */ 5882 static int mvpp2_port_init(struct mvpp2_port *port) 5883 { 5884 struct device *dev = port->dev->dev.parent; 5885 struct mvpp2 *priv = port->priv; 5886 struct mvpp2_txq_pcpu *txq_pcpu; 5887 unsigned int thread; 5888 int queue, err, val; 5889 5890 /* Checks for hardware constraints */ 5891 if (port->first_rxq + port->nrxqs > 5892 MVPP2_MAX_PORTS * priv->max_port_rxqs) 5893 return -EINVAL; 5894 5895 if (port->nrxqs > priv->max_port_rxqs || port->ntxqs > MVPP2_MAX_TXQ) 5896 return -EINVAL; 5897 5898 /* Disable port */ 5899 mvpp2_egress_disable(port); 5900 mvpp2_port_disable(port); 5901 5902 if (mvpp2_is_xlg(port->phy_interface)) { 5903 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 5904 val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 5905 val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN; 5906 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 5907 } else { 5908 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5909 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 5910 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 5911 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5912 } 5913 5914 port->tx_time_coal = MVPP2_TXDONE_COAL_USEC; 5915 5916 port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs), 5917 GFP_KERNEL); 5918 if (!port->txqs) 5919 return -ENOMEM; 5920 5921 /* Associate physical Tx queues to this port and initialize. 5922 * The mapping is predefined. 5923 */ 5924 for (queue = 0; queue < port->ntxqs; queue++) { 5925 int queue_phy_id = mvpp2_txq_phys(port->id, queue); 5926 struct mvpp2_tx_queue *txq; 5927 5928 txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL); 5929 if (!txq) { 5930 err = -ENOMEM; 5931 goto err_free_percpu; 5932 } 5933 5934 txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu); 5935 if (!txq->pcpu) { 5936 err = -ENOMEM; 5937 goto err_free_percpu; 5938 } 5939 5940 txq->id = queue_phy_id; 5941 txq->log_id = queue; 5942 txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH; 5943 for (thread = 0; thread < priv->nthreads; thread++) { 5944 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 5945 txq_pcpu->thread = thread; 5946 } 5947 5948 port->txqs[queue] = txq; 5949 } 5950 5951 port->rxqs = devm_kcalloc(dev, port->nrxqs, sizeof(*port->rxqs), 5952 GFP_KERNEL); 5953 if (!port->rxqs) { 5954 err = -ENOMEM; 5955 goto err_free_percpu; 5956 } 5957 5958 /* Allocate and initialize Rx queue for this port */ 5959 for (queue = 0; queue < port->nrxqs; queue++) { 5960 struct mvpp2_rx_queue *rxq; 5961 5962 /* Map physical Rx queue to port's logical Rx queue */ 5963 rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL); 5964 if (!rxq) { 5965 err = -ENOMEM; 5966 goto err_free_percpu; 5967 } 5968 /* Map this Rx queue to a physical queue */ 5969 rxq->id = port->first_rxq + queue; 5970 rxq->port = port->id; 5971 rxq->logic_rxq = queue; 5972 5973 port->rxqs[queue] = rxq; 5974 } 5975 5976 mvpp2_rx_irqs_setup(port); 5977 5978 /* Create Rx descriptor rings */ 5979 for (queue = 0; queue < port->nrxqs; queue++) { 5980 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 5981 5982 rxq->size = port->rx_ring_size; 5983 rxq->pkts_coal = MVPP2_RX_COAL_PKTS; 5984 rxq->time_coal = MVPP2_RX_COAL_USEC; 5985 } 5986 5987 mvpp2_ingress_disable(port); 5988 5989 /* Port default configuration */ 5990 mvpp2_defaults_set(port); 5991 5992 /* Port's classifier configuration */ 5993 mvpp2_cls_oversize_rxq_set(port); 5994 mvpp2_cls_port_config(port); 5995 5996 if (mvpp22_rss_is_supported(port)) 5997 mvpp22_port_rss_init(port); 5998 5999 /* Provide an initial Rx packet size */ 6000 port->pkt_size = MVPP2_RX_PKT_SIZE(port->dev->mtu); 6001 6002 /* Initialize pools for swf */ 6003 err = mvpp2_swf_bm_pool_init(port); 6004 if (err) 6005 goto err_free_percpu; 6006 6007 /* Clear all port stats */ 6008 mvpp2_read_stats(port); 6009 memset(port->ethtool_stats, 0, 6010 MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs) * sizeof(u64)); 6011 6012 return 0; 6013 6014 err_free_percpu: 6015 for (queue = 0; queue < port->ntxqs; queue++) { 6016 if (!port->txqs[queue]) 6017 continue; 6018 free_percpu(port->txqs[queue]->pcpu); 6019 } 6020 return err; 6021 } 6022 6023 static bool mvpp22_port_has_legacy_tx_irqs(struct device_node *port_node, 6024 unsigned long *flags) 6025 { 6026 char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1", "tx-cpu2", 6027 "tx-cpu3" }; 6028 int i; 6029 6030 for (i = 0; i < 5; i++) 6031 if (of_property_match_string(port_node, "interrupt-names", 6032 irqs[i]) < 0) 6033 return false; 6034 6035 *flags |= MVPP2_F_DT_COMPAT; 6036 return true; 6037 } 6038 6039 /* Checks if the port dt description has the required Tx interrupts: 6040 * - PPv2.1: there are no such interrupts. 6041 * - PPv2.2 and PPv2.3: 6042 * - The old DTs have: "rx-shared", "tx-cpuX" with X in [0...3] 6043 * - The new ones have: "hifX" with X in [0..8] 6044 * 6045 * All those variants are supported to keep the backward compatibility. 6046 */ 6047 static bool mvpp2_port_has_irqs(struct mvpp2 *priv, 6048 struct device_node *port_node, 6049 unsigned long *flags) 6050 { 6051 char name[5]; 6052 int i; 6053 6054 /* ACPI */ 6055 if (!port_node) 6056 return true; 6057 6058 if (priv->hw_version == MVPP21) 6059 return false; 6060 6061 if (mvpp22_port_has_legacy_tx_irqs(port_node, flags)) 6062 return true; 6063 6064 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 6065 snprintf(name, 5, "hif%d", i); 6066 if (of_property_match_string(port_node, "interrupt-names", 6067 name) < 0) 6068 return false; 6069 } 6070 6071 return true; 6072 } 6073 6074 static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv, 6075 struct fwnode_handle *fwnode, 6076 char **mac_from) 6077 { 6078 struct mvpp2_port *port = netdev_priv(dev); 6079 char hw_mac_addr[ETH_ALEN] = {0}; 6080 char fw_mac_addr[ETH_ALEN]; 6081 6082 if (fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) { 6083 *mac_from = "firmware node"; 6084 ether_addr_copy(dev->dev_addr, fw_mac_addr); 6085 return; 6086 } 6087 6088 if (priv->hw_version == MVPP21) { 6089 mvpp21_get_mac_address(port, hw_mac_addr); 6090 if (is_valid_ether_addr(hw_mac_addr)) { 6091 *mac_from = "hardware"; 6092 ether_addr_copy(dev->dev_addr, hw_mac_addr); 6093 return; 6094 } 6095 } 6096 6097 *mac_from = "random"; 6098 eth_hw_addr_random(dev); 6099 } 6100 6101 static struct mvpp2_port *mvpp2_phylink_to_port(struct phylink_config *config) 6102 { 6103 return container_of(config, struct mvpp2_port, phylink_config); 6104 } 6105 6106 static struct mvpp2_port *mvpp2_pcs_to_port(struct phylink_pcs *pcs) 6107 { 6108 return container_of(pcs, struct mvpp2_port, phylink_pcs); 6109 } 6110 6111 static void mvpp2_xlg_pcs_get_state(struct phylink_pcs *pcs, 6112 struct phylink_link_state *state) 6113 { 6114 struct mvpp2_port *port = mvpp2_pcs_to_port(pcs); 6115 u32 val; 6116 6117 state->speed = SPEED_10000; 6118 state->duplex = 1; 6119 state->an_complete = 1; 6120 6121 val = readl(port->base + MVPP22_XLG_STATUS); 6122 state->link = !!(val & MVPP22_XLG_STATUS_LINK_UP); 6123 6124 state->pause = 0; 6125 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6126 if (val & MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN) 6127 state->pause |= MLO_PAUSE_TX; 6128 if (val & MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN) 6129 state->pause |= MLO_PAUSE_RX; 6130 } 6131 6132 static int mvpp2_xlg_pcs_config(struct phylink_pcs *pcs, 6133 unsigned int mode, 6134 phy_interface_t interface, 6135 const unsigned long *advertising, 6136 bool permit_pause_to_mac) 6137 { 6138 return 0; 6139 } 6140 6141 static const struct phylink_pcs_ops mvpp2_phylink_xlg_pcs_ops = { 6142 .pcs_get_state = mvpp2_xlg_pcs_get_state, 6143 .pcs_config = mvpp2_xlg_pcs_config, 6144 }; 6145 6146 static void mvpp2_gmac_pcs_get_state(struct phylink_pcs *pcs, 6147 struct phylink_link_state *state) 6148 { 6149 struct mvpp2_port *port = mvpp2_pcs_to_port(pcs); 6150 u32 val; 6151 6152 val = readl(port->base + MVPP2_GMAC_STATUS0); 6153 6154 state->an_complete = !!(val & MVPP2_GMAC_STATUS0_AN_COMPLETE); 6155 state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP); 6156 state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX); 6157 6158 switch (port->phy_interface) { 6159 case PHY_INTERFACE_MODE_1000BASEX: 6160 state->speed = SPEED_1000; 6161 break; 6162 case PHY_INTERFACE_MODE_2500BASEX: 6163 state->speed = SPEED_2500; 6164 break; 6165 default: 6166 if (val & MVPP2_GMAC_STATUS0_GMII_SPEED) 6167 state->speed = SPEED_1000; 6168 else if (val & MVPP2_GMAC_STATUS0_MII_SPEED) 6169 state->speed = SPEED_100; 6170 else 6171 state->speed = SPEED_10; 6172 } 6173 6174 state->pause = 0; 6175 if (val & MVPP2_GMAC_STATUS0_RX_PAUSE) 6176 state->pause |= MLO_PAUSE_RX; 6177 if (val & MVPP2_GMAC_STATUS0_TX_PAUSE) 6178 state->pause |= MLO_PAUSE_TX; 6179 } 6180 6181 static int mvpp2_gmac_pcs_config(struct phylink_pcs *pcs, unsigned int mode, 6182 phy_interface_t interface, 6183 const unsigned long *advertising, 6184 bool permit_pause_to_mac) 6185 { 6186 struct mvpp2_port *port = mvpp2_pcs_to_port(pcs); 6187 u32 mask, val, an, old_an, changed; 6188 6189 mask = MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS | 6190 MVPP2_GMAC_IN_BAND_AUTONEG | 6191 MVPP2_GMAC_AN_SPEED_EN | 6192 MVPP2_GMAC_FLOW_CTRL_AUTONEG | 6193 MVPP2_GMAC_AN_DUPLEX_EN; 6194 6195 if (phylink_autoneg_inband(mode)) { 6196 mask |= MVPP2_GMAC_CONFIG_MII_SPEED | 6197 MVPP2_GMAC_CONFIG_GMII_SPEED | 6198 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6199 val = MVPP2_GMAC_IN_BAND_AUTONEG; 6200 6201 if (interface == PHY_INTERFACE_MODE_SGMII) { 6202 /* SGMII mode receives the speed and duplex from PHY */ 6203 val |= MVPP2_GMAC_AN_SPEED_EN | 6204 MVPP2_GMAC_AN_DUPLEX_EN; 6205 } else { 6206 /* 802.3z mode has fixed speed and duplex */ 6207 val |= MVPP2_GMAC_CONFIG_GMII_SPEED | 6208 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6209 6210 /* The FLOW_CTRL_AUTONEG bit selects either the hardware 6211 * automatically or the bits in MVPP22_GMAC_CTRL_4_REG 6212 * manually controls the GMAC pause modes. 6213 */ 6214 if (permit_pause_to_mac) 6215 val |= MVPP2_GMAC_FLOW_CTRL_AUTONEG; 6216 6217 /* Configure advertisement bits */ 6218 mask |= MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN; 6219 if (phylink_test(advertising, Pause)) 6220 val |= MVPP2_GMAC_FC_ADV_EN; 6221 if (phylink_test(advertising, Asym_Pause)) 6222 val |= MVPP2_GMAC_FC_ADV_ASM_EN; 6223 } 6224 } else { 6225 val = 0; 6226 } 6227 6228 old_an = an = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6229 an = (an & ~mask) | val; 6230 changed = an ^ old_an; 6231 if (changed) 6232 writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6233 6234 /* We are only interested in the advertisement bits changing */ 6235 return changed & (MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN); 6236 } 6237 6238 static void mvpp2_gmac_pcs_an_restart(struct phylink_pcs *pcs) 6239 { 6240 struct mvpp2_port *port = mvpp2_pcs_to_port(pcs); 6241 u32 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6242 6243 writel(val | MVPP2_GMAC_IN_BAND_RESTART_AN, 6244 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6245 writel(val & ~MVPP2_GMAC_IN_BAND_RESTART_AN, 6246 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6247 } 6248 6249 static const struct phylink_pcs_ops mvpp2_phylink_gmac_pcs_ops = { 6250 .pcs_get_state = mvpp2_gmac_pcs_get_state, 6251 .pcs_config = mvpp2_gmac_pcs_config, 6252 .pcs_an_restart = mvpp2_gmac_pcs_an_restart, 6253 }; 6254 6255 static void mvpp2_phylink_validate(struct phylink_config *config, 6256 unsigned long *supported, 6257 struct phylink_link_state *state) 6258 { 6259 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6260 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 6261 6262 /* Invalid combinations */ 6263 switch (state->interface) { 6264 case PHY_INTERFACE_MODE_10GBASER: 6265 case PHY_INTERFACE_MODE_XAUI: 6266 if (!mvpp2_port_supports_xlg(port)) 6267 goto empty_set; 6268 break; 6269 case PHY_INTERFACE_MODE_RGMII: 6270 case PHY_INTERFACE_MODE_RGMII_ID: 6271 case PHY_INTERFACE_MODE_RGMII_RXID: 6272 case PHY_INTERFACE_MODE_RGMII_TXID: 6273 if (!mvpp2_port_supports_rgmii(port)) 6274 goto empty_set; 6275 break; 6276 default: 6277 break; 6278 } 6279 6280 phylink_set(mask, Autoneg); 6281 phylink_set_port_modes(mask); 6282 6283 if (port->priv->global_tx_fc) { 6284 phylink_set(mask, Pause); 6285 phylink_set(mask, Asym_Pause); 6286 } 6287 6288 switch (state->interface) { 6289 case PHY_INTERFACE_MODE_10GBASER: 6290 case PHY_INTERFACE_MODE_XAUI: 6291 case PHY_INTERFACE_MODE_NA: 6292 if (mvpp2_port_supports_xlg(port)) { 6293 phylink_set(mask, 10000baseT_Full); 6294 phylink_set(mask, 10000baseCR_Full); 6295 phylink_set(mask, 10000baseSR_Full); 6296 phylink_set(mask, 10000baseLR_Full); 6297 phylink_set(mask, 10000baseLRM_Full); 6298 phylink_set(mask, 10000baseER_Full); 6299 phylink_set(mask, 10000baseKR_Full); 6300 } 6301 if (state->interface != PHY_INTERFACE_MODE_NA) 6302 break; 6303 fallthrough; 6304 case PHY_INTERFACE_MODE_RGMII: 6305 case PHY_INTERFACE_MODE_RGMII_ID: 6306 case PHY_INTERFACE_MODE_RGMII_RXID: 6307 case PHY_INTERFACE_MODE_RGMII_TXID: 6308 case PHY_INTERFACE_MODE_SGMII: 6309 phylink_set(mask, 10baseT_Half); 6310 phylink_set(mask, 10baseT_Full); 6311 phylink_set(mask, 100baseT_Half); 6312 phylink_set(mask, 100baseT_Full); 6313 phylink_set(mask, 1000baseT_Full); 6314 phylink_set(mask, 1000baseX_Full); 6315 if (state->interface != PHY_INTERFACE_MODE_NA) 6316 break; 6317 fallthrough; 6318 case PHY_INTERFACE_MODE_1000BASEX: 6319 case PHY_INTERFACE_MODE_2500BASEX: 6320 if (port->comphy || 6321 state->interface != PHY_INTERFACE_MODE_2500BASEX) { 6322 phylink_set(mask, 1000baseT_Full); 6323 phylink_set(mask, 1000baseX_Full); 6324 } 6325 if (port->comphy || 6326 state->interface == PHY_INTERFACE_MODE_2500BASEX) { 6327 phylink_set(mask, 2500baseT_Full); 6328 phylink_set(mask, 2500baseX_Full); 6329 } 6330 break; 6331 default: 6332 goto empty_set; 6333 } 6334 6335 bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS); 6336 bitmap_and(state->advertising, state->advertising, mask, 6337 __ETHTOOL_LINK_MODE_MASK_NBITS); 6338 6339 phylink_helper_basex_speed(state); 6340 return; 6341 6342 empty_set: 6343 bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 6344 } 6345 6346 static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, 6347 const struct phylink_link_state *state) 6348 { 6349 u32 val; 6350 6351 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6352 MVPP22_XLG_CTRL0_MAC_RESET_DIS, 6353 MVPP22_XLG_CTRL0_MAC_RESET_DIS); 6354 mvpp2_modify(port->base + MVPP22_XLG_CTRL4_REG, 6355 MVPP22_XLG_CTRL4_MACMODSELECT_GMAC | 6356 MVPP22_XLG_CTRL4_EN_IDLE_CHECK | 6357 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC, 6358 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC); 6359 6360 /* Wait for reset to deassert */ 6361 do { 6362 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6363 } while (!(val & MVPP22_XLG_CTRL0_MAC_RESET_DIS)); 6364 } 6365 6366 static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode, 6367 const struct phylink_link_state *state) 6368 { 6369 u32 old_ctrl0, ctrl0; 6370 u32 old_ctrl2, ctrl2; 6371 u32 old_ctrl4, ctrl4; 6372 6373 old_ctrl0 = ctrl0 = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 6374 old_ctrl2 = ctrl2 = readl(port->base + MVPP2_GMAC_CTRL_2_REG); 6375 old_ctrl4 = ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG); 6376 6377 ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK; 6378 ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_FLOW_CTRL_MASK); 6379 6380 /* Configure port type */ 6381 if (phy_interface_mode_is_8023z(state->interface)) { 6382 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK; 6383 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 6384 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 6385 MVPP22_CTRL4_DP_CLK_SEL | 6386 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6387 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 6388 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_INBAND_AN_MASK; 6389 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 6390 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 6391 MVPP22_CTRL4_DP_CLK_SEL | 6392 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6393 } else if (phy_interface_mode_is_rgmii(state->interface)) { 6394 ctrl4 &= ~MVPP22_CTRL4_DP_CLK_SEL; 6395 ctrl4 |= MVPP22_CTRL4_EXT_PIN_GMII_SEL | 6396 MVPP22_CTRL4_SYNC_BYPASS_DIS | 6397 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6398 } 6399 6400 /* Configure negotiation style */ 6401 if (!phylink_autoneg_inband(mode)) { 6402 /* Phy or fixed speed - no in-band AN, nothing to do, leave the 6403 * configured speed, duplex and flow control as-is. 6404 */ 6405 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 6406 /* SGMII in-band mode receives the speed and duplex from 6407 * the PHY. Flow control information is not received. */ 6408 } else if (phy_interface_mode_is_8023z(state->interface)) { 6409 /* 1000BaseX and 2500BaseX ports cannot negotiate speed nor can 6410 * they negotiate duplex: they are always operating with a fixed 6411 * speed of 1000/2500Mbps in full duplex, so force 1000/2500 6412 * speed and full duplex here. 6413 */ 6414 ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK; 6415 } 6416 6417 if (old_ctrl0 != ctrl0) 6418 writel(ctrl0, port->base + MVPP2_GMAC_CTRL_0_REG); 6419 if (old_ctrl2 != ctrl2) 6420 writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 6421 if (old_ctrl4 != ctrl4) 6422 writel(ctrl4, port->base + MVPP22_GMAC_CTRL_4_REG); 6423 } 6424 6425 static int mvpp2__mac_prepare(struct phylink_config *config, unsigned int mode, 6426 phy_interface_t interface) 6427 { 6428 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6429 6430 /* Check for invalid configuration */ 6431 if (mvpp2_is_xlg(interface) && port->gop_id != 0) { 6432 netdev_err(port->dev, "Invalid mode on %s\n", port->dev->name); 6433 return -EINVAL; 6434 } 6435 6436 if (port->phy_interface != interface || 6437 phylink_autoneg_inband(mode)) { 6438 /* Force the link down when changing the interface or if in 6439 * in-band mode to ensure we do not change the configuration 6440 * while the hardware is indicating link is up. We force both 6441 * XLG and GMAC down to ensure that they're both in a known 6442 * state. 6443 */ 6444 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6445 MVPP2_GMAC_FORCE_LINK_PASS | 6446 MVPP2_GMAC_FORCE_LINK_DOWN, 6447 MVPP2_GMAC_FORCE_LINK_DOWN); 6448 6449 if (mvpp2_port_supports_xlg(port)) 6450 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6451 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6452 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN, 6453 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN); 6454 } 6455 6456 /* Make sure the port is disabled when reconfiguring the mode */ 6457 mvpp2_port_disable(port); 6458 6459 if (port->phy_interface != interface) { 6460 /* Place GMAC into reset */ 6461 mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG, 6462 MVPP2_GMAC_PORT_RESET_MASK, 6463 MVPP2_GMAC_PORT_RESET_MASK); 6464 6465 if (port->priv->hw_version >= MVPP22) { 6466 mvpp22_gop_mask_irq(port); 6467 6468 phy_power_off(port->comphy); 6469 } 6470 } 6471 6472 /* Select the appropriate PCS operations depending on the 6473 * configured interface mode. We will only switch to a mode 6474 * that the validate() checks have already passed. 6475 */ 6476 if (mvpp2_is_xlg(interface)) 6477 port->phylink_pcs.ops = &mvpp2_phylink_xlg_pcs_ops; 6478 else 6479 port->phylink_pcs.ops = &mvpp2_phylink_gmac_pcs_ops; 6480 6481 return 0; 6482 } 6483 6484 static int mvpp2_mac_prepare(struct phylink_config *config, unsigned int mode, 6485 phy_interface_t interface) 6486 { 6487 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6488 int ret; 6489 6490 ret = mvpp2__mac_prepare(config, mode, interface); 6491 if (ret == 0) 6492 phylink_set_pcs(port->phylink, &port->phylink_pcs); 6493 6494 return ret; 6495 } 6496 6497 static void mvpp2_mac_config(struct phylink_config *config, unsigned int mode, 6498 const struct phylink_link_state *state) 6499 { 6500 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6501 6502 /* mac (re)configuration */ 6503 if (mvpp2_is_xlg(state->interface)) 6504 mvpp2_xlg_config(port, mode, state); 6505 else if (phy_interface_mode_is_rgmii(state->interface) || 6506 phy_interface_mode_is_8023z(state->interface) || 6507 state->interface == PHY_INTERFACE_MODE_SGMII) 6508 mvpp2_gmac_config(port, mode, state); 6509 6510 if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK) 6511 mvpp2_port_loopback_set(port, state); 6512 } 6513 6514 static int mvpp2_mac_finish(struct phylink_config *config, unsigned int mode, 6515 phy_interface_t interface) 6516 { 6517 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6518 6519 if (port->priv->hw_version >= MVPP22 && 6520 port->phy_interface != interface) { 6521 port->phy_interface = interface; 6522 6523 /* Reconfigure the serdes lanes */ 6524 mvpp22_mode_reconfigure(port); 6525 6526 /* Unmask interrupts */ 6527 mvpp22_gop_unmask_irq(port); 6528 } 6529 6530 if (!mvpp2_is_xlg(interface)) { 6531 /* Release GMAC reset and wait */ 6532 mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG, 6533 MVPP2_GMAC_PORT_RESET_MASK, 0); 6534 6535 while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) & 6536 MVPP2_GMAC_PORT_RESET_MASK) 6537 continue; 6538 } 6539 6540 mvpp2_port_enable(port); 6541 6542 /* Allow the link to come up if in in-band mode, otherwise the 6543 * link is forced via mac_link_down()/mac_link_up() 6544 */ 6545 if (phylink_autoneg_inband(mode)) { 6546 if (mvpp2_is_xlg(interface)) 6547 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6548 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6549 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN, 0); 6550 else 6551 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6552 MVPP2_GMAC_FORCE_LINK_PASS | 6553 MVPP2_GMAC_FORCE_LINK_DOWN, 0); 6554 } 6555 6556 return 0; 6557 } 6558 6559 static void mvpp2_mac_link_up(struct phylink_config *config, 6560 struct phy_device *phy, 6561 unsigned int mode, phy_interface_t interface, 6562 int speed, int duplex, 6563 bool tx_pause, bool rx_pause) 6564 { 6565 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6566 u32 val; 6567 int i; 6568 6569 if (mvpp2_is_xlg(interface)) { 6570 if (!phylink_autoneg_inband(mode)) { 6571 val = MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 6572 if (tx_pause) 6573 val |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN; 6574 if (rx_pause) 6575 val |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN; 6576 6577 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6578 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN | 6579 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6580 MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN | 6581 MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN, val); 6582 } 6583 } else { 6584 if (!phylink_autoneg_inband(mode)) { 6585 val = MVPP2_GMAC_FORCE_LINK_PASS; 6586 6587 if (speed == SPEED_1000 || speed == SPEED_2500) 6588 val |= MVPP2_GMAC_CONFIG_GMII_SPEED; 6589 else if (speed == SPEED_100) 6590 val |= MVPP2_GMAC_CONFIG_MII_SPEED; 6591 6592 if (duplex == DUPLEX_FULL) 6593 val |= MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6594 6595 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6596 MVPP2_GMAC_FORCE_LINK_DOWN | 6597 MVPP2_GMAC_FORCE_LINK_PASS | 6598 MVPP2_GMAC_CONFIG_MII_SPEED | 6599 MVPP2_GMAC_CONFIG_GMII_SPEED | 6600 MVPP2_GMAC_CONFIG_FULL_DUPLEX, val); 6601 } 6602 6603 /* We can always update the flow control enable bits; 6604 * these will only be effective if flow control AN 6605 * (MVPP2_GMAC_FLOW_CTRL_AUTONEG) is disabled. 6606 */ 6607 val = 0; 6608 if (tx_pause) 6609 val |= MVPP22_CTRL4_TX_FC_EN; 6610 if (rx_pause) 6611 val |= MVPP22_CTRL4_RX_FC_EN; 6612 6613 mvpp2_modify(port->base + MVPP22_GMAC_CTRL_4_REG, 6614 MVPP22_CTRL4_RX_FC_EN | MVPP22_CTRL4_TX_FC_EN, 6615 val); 6616 } 6617 6618 if (port->priv->global_tx_fc) { 6619 port->tx_fc = tx_pause; 6620 if (tx_pause) 6621 mvpp2_rxq_enable_fc(port); 6622 else 6623 mvpp2_rxq_disable_fc(port); 6624 if (port->priv->percpu_pools) { 6625 for (i = 0; i < port->nrxqs; i++) 6626 mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], tx_pause); 6627 } else { 6628 mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause); 6629 mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause); 6630 } 6631 if (port->priv->hw_version == MVPP23) 6632 mvpp23_rx_fifo_fc_en(port->priv, port->id, tx_pause); 6633 } 6634 6635 mvpp2_port_enable(port); 6636 6637 mvpp2_egress_enable(port); 6638 mvpp2_ingress_enable(port); 6639 netif_tx_wake_all_queues(port->dev); 6640 } 6641 6642 static void mvpp2_mac_link_down(struct phylink_config *config, 6643 unsigned int mode, phy_interface_t interface) 6644 { 6645 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6646 u32 val; 6647 6648 if (!phylink_autoneg_inband(mode)) { 6649 if (mvpp2_is_xlg(interface)) { 6650 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6651 val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 6652 val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN; 6653 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 6654 } else { 6655 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6656 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 6657 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 6658 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6659 } 6660 } 6661 6662 netif_tx_stop_all_queues(port->dev); 6663 mvpp2_egress_disable(port); 6664 mvpp2_ingress_disable(port); 6665 6666 mvpp2_port_disable(port); 6667 } 6668 6669 static const struct phylink_mac_ops mvpp2_phylink_ops = { 6670 .validate = mvpp2_phylink_validate, 6671 .mac_prepare = mvpp2_mac_prepare, 6672 .mac_config = mvpp2_mac_config, 6673 .mac_finish = mvpp2_mac_finish, 6674 .mac_link_up = mvpp2_mac_link_up, 6675 .mac_link_down = mvpp2_mac_link_down, 6676 }; 6677 6678 /* Work-around for ACPI */ 6679 static void mvpp2_acpi_start(struct mvpp2_port *port) 6680 { 6681 /* Phylink isn't used as of now for ACPI, so the MAC has to be 6682 * configured manually when the interface is started. This will 6683 * be removed as soon as the phylink ACPI support lands in. 6684 */ 6685 struct phylink_link_state state = { 6686 .interface = port->phy_interface, 6687 }; 6688 mvpp2__mac_prepare(&port->phylink_config, MLO_AN_INBAND, 6689 port->phy_interface); 6690 mvpp2_mac_config(&port->phylink_config, MLO_AN_INBAND, &state); 6691 port->phylink_pcs.ops->pcs_config(&port->phylink_pcs, MLO_AN_INBAND, 6692 port->phy_interface, 6693 state.advertising, false); 6694 mvpp2_mac_finish(&port->phylink_config, MLO_AN_INBAND, 6695 port->phy_interface); 6696 mvpp2_mac_link_up(&port->phylink_config, NULL, 6697 MLO_AN_INBAND, port->phy_interface, 6698 SPEED_UNKNOWN, DUPLEX_UNKNOWN, false, false); 6699 } 6700 6701 /* In order to ensure backward compatibility for ACPI, check if the port 6702 * firmware node comprises the necessary description allowing to use phylink. 6703 */ 6704 static bool mvpp2_use_acpi_compat_mode(struct fwnode_handle *port_fwnode) 6705 { 6706 if (!is_acpi_node(port_fwnode)) 6707 return false; 6708 6709 return (!fwnode_property_present(port_fwnode, "phy-handle") && 6710 !fwnode_property_present(port_fwnode, "managed") && 6711 !fwnode_get_named_child_node(port_fwnode, "fixed-link")); 6712 } 6713 6714 /* Ports initialization */ 6715 static int mvpp2_port_probe(struct platform_device *pdev, 6716 struct fwnode_handle *port_fwnode, 6717 struct mvpp2 *priv) 6718 { 6719 struct phy *comphy = NULL; 6720 struct mvpp2_port *port; 6721 struct mvpp2_port_pcpu *port_pcpu; 6722 struct device_node *port_node = to_of_node(port_fwnode); 6723 netdev_features_t features; 6724 struct net_device *dev; 6725 struct phylink *phylink; 6726 char *mac_from = ""; 6727 unsigned int ntxqs, nrxqs, thread; 6728 unsigned long flags = 0; 6729 bool has_tx_irqs; 6730 u32 id; 6731 int phy_mode; 6732 int err, i; 6733 6734 has_tx_irqs = mvpp2_port_has_irqs(priv, port_node, &flags); 6735 if (!has_tx_irqs && queue_mode == MVPP2_QDIST_MULTI_MODE) { 6736 dev_err(&pdev->dev, 6737 "not enough IRQs to support multi queue mode\n"); 6738 return -EINVAL; 6739 } 6740 6741 ntxqs = MVPP2_MAX_TXQ; 6742 nrxqs = mvpp2_get_nrxqs(priv); 6743 6744 dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs); 6745 if (!dev) 6746 return -ENOMEM; 6747 6748 phy_mode = fwnode_get_phy_mode(port_fwnode); 6749 if (phy_mode < 0) { 6750 dev_err(&pdev->dev, "incorrect phy mode\n"); 6751 err = phy_mode; 6752 goto err_free_netdev; 6753 } 6754 6755 /* 6756 * Rewrite 10GBASE-KR to 10GBASE-R for compatibility with existing DT. 6757 * Existing usage of 10GBASE-KR is not correct; no backplane 6758 * negotiation is done, and this driver does not actually support 6759 * 10GBASE-KR. 6760 */ 6761 if (phy_mode == PHY_INTERFACE_MODE_10GKR) 6762 phy_mode = PHY_INTERFACE_MODE_10GBASER; 6763 6764 if (port_node) { 6765 comphy = devm_of_phy_get(&pdev->dev, port_node, NULL); 6766 if (IS_ERR(comphy)) { 6767 if (PTR_ERR(comphy) == -EPROBE_DEFER) { 6768 err = -EPROBE_DEFER; 6769 goto err_free_netdev; 6770 } 6771 comphy = NULL; 6772 } 6773 } 6774 6775 if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) { 6776 err = -EINVAL; 6777 dev_err(&pdev->dev, "missing port-id value\n"); 6778 goto err_free_netdev; 6779 } 6780 6781 dev->tx_queue_len = MVPP2_MAX_TXD_MAX; 6782 dev->watchdog_timeo = 5 * HZ; 6783 dev->netdev_ops = &mvpp2_netdev_ops; 6784 dev->ethtool_ops = &mvpp2_eth_tool_ops; 6785 6786 port = netdev_priv(dev); 6787 port->dev = dev; 6788 port->fwnode = port_fwnode; 6789 port->ntxqs = ntxqs; 6790 port->nrxqs = nrxqs; 6791 port->priv = priv; 6792 port->has_tx_irqs = has_tx_irqs; 6793 port->flags = flags; 6794 6795 err = mvpp2_queue_vectors_init(port, port_node); 6796 if (err) 6797 goto err_free_netdev; 6798 6799 if (port_node) 6800 port->port_irq = of_irq_get_byname(port_node, "link"); 6801 else 6802 port->port_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1); 6803 if (port->port_irq == -EPROBE_DEFER) { 6804 err = -EPROBE_DEFER; 6805 goto err_deinit_qvecs; 6806 } 6807 if (port->port_irq <= 0) 6808 /* the link irq is optional */ 6809 port->port_irq = 0; 6810 6811 if (fwnode_property_read_bool(port_fwnode, "marvell,loopback")) 6812 port->flags |= MVPP2_F_LOOPBACK; 6813 6814 port->id = id; 6815 if (priv->hw_version == MVPP21) 6816 port->first_rxq = port->id * port->nrxqs; 6817 else 6818 port->first_rxq = port->id * priv->max_port_rxqs; 6819 6820 port->of_node = port_node; 6821 port->phy_interface = phy_mode; 6822 port->comphy = comphy; 6823 6824 if (priv->hw_version == MVPP21) { 6825 port->base = devm_platform_ioremap_resource(pdev, 2 + id); 6826 if (IS_ERR(port->base)) { 6827 err = PTR_ERR(port->base); 6828 goto err_free_irq; 6829 } 6830 6831 port->stats_base = port->priv->lms_base + 6832 MVPP21_MIB_COUNTERS_OFFSET + 6833 port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ; 6834 } else { 6835 if (fwnode_property_read_u32(port_fwnode, "gop-port-id", 6836 &port->gop_id)) { 6837 err = -EINVAL; 6838 dev_err(&pdev->dev, "missing gop-port-id value\n"); 6839 goto err_deinit_qvecs; 6840 } 6841 6842 port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id); 6843 port->stats_base = port->priv->iface_base + 6844 MVPP22_MIB_COUNTERS_OFFSET + 6845 port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ; 6846 6847 /* We may want a property to describe whether we should use 6848 * MAC hardware timestamping. 6849 */ 6850 if (priv->tai) 6851 port->hwtstamp = true; 6852 } 6853 6854 /* Alloc per-cpu and ethtool stats */ 6855 port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats); 6856 if (!port->stats) { 6857 err = -ENOMEM; 6858 goto err_free_irq; 6859 } 6860 6861 port->ethtool_stats = devm_kcalloc(&pdev->dev, 6862 MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs), 6863 sizeof(u64), GFP_KERNEL); 6864 if (!port->ethtool_stats) { 6865 err = -ENOMEM; 6866 goto err_free_stats; 6867 } 6868 6869 mutex_init(&port->gather_stats_lock); 6870 INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics); 6871 6872 mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from); 6873 6874 port->tx_ring_size = MVPP2_MAX_TXD_DFLT; 6875 port->rx_ring_size = MVPP2_MAX_RXD_DFLT; 6876 SET_NETDEV_DEV(dev, &pdev->dev); 6877 6878 err = mvpp2_port_init(port); 6879 if (err < 0) { 6880 dev_err(&pdev->dev, "failed to init port %d\n", id); 6881 goto err_free_stats; 6882 } 6883 6884 mvpp2_port_periodic_xon_disable(port); 6885 6886 mvpp2_mac_reset_assert(port); 6887 mvpp22_pcs_reset_assert(port); 6888 6889 port->pcpu = alloc_percpu(struct mvpp2_port_pcpu); 6890 if (!port->pcpu) { 6891 err = -ENOMEM; 6892 goto err_free_txq_pcpu; 6893 } 6894 6895 if (!port->has_tx_irqs) { 6896 for (thread = 0; thread < priv->nthreads; thread++) { 6897 port_pcpu = per_cpu_ptr(port->pcpu, thread); 6898 6899 hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC, 6900 HRTIMER_MODE_REL_PINNED_SOFT); 6901 port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb; 6902 port_pcpu->timer_scheduled = false; 6903 port_pcpu->dev = dev; 6904 } 6905 } 6906 6907 features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 6908 NETIF_F_TSO; 6909 dev->features = features | NETIF_F_RXCSUM; 6910 dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO | 6911 NETIF_F_HW_VLAN_CTAG_FILTER; 6912 6913 if (mvpp22_rss_is_supported(port)) { 6914 dev->hw_features |= NETIF_F_RXHASH; 6915 dev->features |= NETIF_F_NTUPLE; 6916 } 6917 6918 if (!port->priv->percpu_pools) 6919 mvpp2_set_hw_csum(port, port->pool_long->id); 6920 6921 dev->vlan_features |= features; 6922 dev->gso_max_segs = MVPP2_MAX_TSO_SEGS; 6923 dev->priv_flags |= IFF_UNICAST_FLT; 6924 6925 /* MTU range: 68 - 9704 */ 6926 dev->min_mtu = ETH_MIN_MTU; 6927 /* 9704 == 9728 - 20 and rounding to 8 */ 6928 dev->max_mtu = MVPP2_BM_JUMBO_PKT_SIZE; 6929 dev->dev.of_node = port_node; 6930 6931 if (!mvpp2_use_acpi_compat_mode(port_fwnode)) { 6932 port->phylink_config.dev = &dev->dev; 6933 port->phylink_config.type = PHYLINK_NETDEV; 6934 6935 phylink = phylink_create(&port->phylink_config, port_fwnode, 6936 phy_mode, &mvpp2_phylink_ops); 6937 if (IS_ERR(phylink)) { 6938 err = PTR_ERR(phylink); 6939 goto err_free_port_pcpu; 6940 } 6941 port->phylink = phylink; 6942 } else { 6943 dev_warn(&pdev->dev, "Use link irqs for port#%d. FW update required\n", port->id); 6944 port->phylink = NULL; 6945 } 6946 6947 /* Cycle the comphy to power it down, saving 270mW per port - 6948 * don't worry about an error powering it up. When the comphy 6949 * driver does this, we can remove this code. 6950 */ 6951 if (port->comphy) { 6952 err = mvpp22_comphy_init(port); 6953 if (err == 0) 6954 phy_power_off(port->comphy); 6955 } 6956 6957 err = register_netdev(dev); 6958 if (err < 0) { 6959 dev_err(&pdev->dev, "failed to register netdev\n"); 6960 goto err_phylink; 6961 } 6962 netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr); 6963 6964 priv->port_list[priv->port_count++] = port; 6965 6966 return 0; 6967 6968 err_phylink: 6969 if (port->phylink) 6970 phylink_destroy(port->phylink); 6971 err_free_port_pcpu: 6972 free_percpu(port->pcpu); 6973 err_free_txq_pcpu: 6974 for (i = 0; i < port->ntxqs; i++) 6975 free_percpu(port->txqs[i]->pcpu); 6976 err_free_stats: 6977 free_percpu(port->stats); 6978 err_free_irq: 6979 if (port->port_irq) 6980 irq_dispose_mapping(port->port_irq); 6981 err_deinit_qvecs: 6982 mvpp2_queue_vectors_deinit(port); 6983 err_free_netdev: 6984 free_netdev(dev); 6985 return err; 6986 } 6987 6988 /* Ports removal routine */ 6989 static void mvpp2_port_remove(struct mvpp2_port *port) 6990 { 6991 int i; 6992 6993 unregister_netdev(port->dev); 6994 if (port->phylink) 6995 phylink_destroy(port->phylink); 6996 free_percpu(port->pcpu); 6997 free_percpu(port->stats); 6998 for (i = 0; i < port->ntxqs; i++) 6999 free_percpu(port->txqs[i]->pcpu); 7000 mvpp2_queue_vectors_deinit(port); 7001 if (port->port_irq) 7002 irq_dispose_mapping(port->port_irq); 7003 free_netdev(port->dev); 7004 } 7005 7006 /* Initialize decoding windows */ 7007 static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram, 7008 struct mvpp2 *priv) 7009 { 7010 u32 win_enable; 7011 int i; 7012 7013 for (i = 0; i < 6; i++) { 7014 mvpp2_write(priv, MVPP2_WIN_BASE(i), 0); 7015 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0); 7016 7017 if (i < 4) 7018 mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0); 7019 } 7020 7021 win_enable = 0; 7022 7023 for (i = 0; i < dram->num_cs; i++) { 7024 const struct mbus_dram_window *cs = dram->cs + i; 7025 7026 mvpp2_write(priv, MVPP2_WIN_BASE(i), 7027 (cs->base & 0xffff0000) | (cs->mbus_attr << 8) | 7028 dram->mbus_dram_target_id); 7029 7030 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 7031 (cs->size - 1) & 0xffff0000); 7032 7033 win_enable |= (1 << i); 7034 } 7035 7036 mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable); 7037 } 7038 7039 /* Initialize Rx FIFO's */ 7040 static void mvpp2_rx_fifo_init(struct mvpp2 *priv) 7041 { 7042 int port; 7043 7044 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 7045 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 7046 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 7047 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 7048 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 7049 } 7050 7051 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 7052 MVPP2_RX_FIFO_PORT_MIN_PKT); 7053 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 7054 } 7055 7056 static void mvpp22_rx_fifo_set_hw(struct mvpp2 *priv, int port, int data_size) 7057 { 7058 int attr_size = MVPP2_RX_FIFO_PORT_ATTR_SIZE(data_size); 7059 7060 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), data_size); 7061 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), attr_size); 7062 } 7063 7064 /* Initialize TX FIFO's: the total FIFO size is 48kB on PPv2.2 and PPv2.3. 7065 * 4kB fixed space must be assigned for the loopback port. 7066 * Redistribute remaining avialable 44kB space among all active ports. 7067 * Guarantee minimum 32kB for 10G port and 8kB for port 1, capable of 2.5G 7068 * SGMII link. 7069 */ 7070 static void mvpp22_rx_fifo_init(struct mvpp2 *priv) 7071 { 7072 int remaining_ports_count; 7073 unsigned long port_map; 7074 int size_remainder; 7075 int port, size; 7076 7077 /* The loopback requires fixed 4kB of the FIFO space assignment. */ 7078 mvpp22_rx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX, 7079 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 7080 port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX); 7081 7082 /* Set RX FIFO size to 0 for inactive ports. */ 7083 for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) 7084 mvpp22_rx_fifo_set_hw(priv, port, 0); 7085 7086 /* Assign remaining RX FIFO space among all active ports. */ 7087 size_remainder = MVPP2_RX_FIFO_PORT_DATA_SIZE_44KB; 7088 remaining_ports_count = hweight_long(port_map); 7089 7090 for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) { 7091 if (remaining_ports_count == 1) 7092 size = size_remainder; 7093 else if (port == 0) 7094 size = max(size_remainder / remaining_ports_count, 7095 MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB); 7096 else if (port == 1) 7097 size = max(size_remainder / remaining_ports_count, 7098 MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB); 7099 else 7100 size = size_remainder / remaining_ports_count; 7101 7102 size_remainder -= size; 7103 remaining_ports_count--; 7104 7105 mvpp22_rx_fifo_set_hw(priv, port, size); 7106 } 7107 7108 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 7109 MVPP2_RX_FIFO_PORT_MIN_PKT); 7110 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 7111 } 7112 7113 /* Configure Rx FIFO Flow control thresholds */ 7114 static void mvpp23_rx_fifo_fc_set_tresh(struct mvpp2 *priv) 7115 { 7116 int port, val; 7117 7118 /* Port 0: maximum speed -10Gb/s port 7119 * required by spec RX FIFO threshold 9KB 7120 * Port 1: maximum speed -5Gb/s port 7121 * required by spec RX FIFO threshold 4KB 7122 * Port 2: maximum speed -1Gb/s port 7123 * required by spec RX FIFO threshold 2KB 7124 */ 7125 7126 /* Without loopback port */ 7127 for (port = 0; port < (MVPP2_MAX_PORTS - 1); port++) { 7128 if (port == 0) { 7129 val = (MVPP23_PORT0_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7130 << MVPP2_RX_FC_TRSH_OFFS; 7131 val &= MVPP2_RX_FC_TRSH_MASK; 7132 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7133 } else if (port == 1) { 7134 val = (MVPP23_PORT1_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7135 << MVPP2_RX_FC_TRSH_OFFS; 7136 val &= MVPP2_RX_FC_TRSH_MASK; 7137 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7138 } else { 7139 val = (MVPP23_PORT2_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7140 << MVPP2_RX_FC_TRSH_OFFS; 7141 val &= MVPP2_RX_FC_TRSH_MASK; 7142 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7143 } 7144 } 7145 } 7146 7147 /* Configure Rx FIFO Flow control thresholds */ 7148 void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en) 7149 { 7150 int val; 7151 7152 val = mvpp2_read(priv, MVPP2_RX_FC_REG(port)); 7153 7154 if (en) 7155 val |= MVPP2_RX_FC_EN; 7156 else 7157 val &= ~MVPP2_RX_FC_EN; 7158 7159 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7160 } 7161 7162 static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size) 7163 { 7164 int threshold = MVPP2_TX_FIFO_THRESHOLD(size); 7165 7166 mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port), size); 7167 mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), threshold); 7168 } 7169 7170 /* Initialize TX FIFO's: the total FIFO size is 19kB on PPv2.2 and PPv2.3. 7171 * 1kB fixed space must be assigned for the loopback port. 7172 * Redistribute remaining avialable 18kB space among all active ports. 7173 * The 10G interface should use 10kB (which is maximum possible size 7174 * per single port). 7175 */ 7176 static void mvpp22_tx_fifo_init(struct mvpp2 *priv) 7177 { 7178 int remaining_ports_count; 7179 unsigned long port_map; 7180 int size_remainder; 7181 int port, size; 7182 7183 /* The loopback requires fixed 1kB of the FIFO space assignment. */ 7184 mvpp22_tx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX, 7185 MVPP22_TX_FIFO_DATA_SIZE_1KB); 7186 port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX); 7187 7188 /* Set TX FIFO size to 0 for inactive ports. */ 7189 for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) 7190 mvpp22_tx_fifo_set_hw(priv, port, 0); 7191 7192 /* Assign remaining TX FIFO space among all active ports. */ 7193 size_remainder = MVPP22_TX_FIFO_DATA_SIZE_18KB; 7194 remaining_ports_count = hweight_long(port_map); 7195 7196 for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) { 7197 if (remaining_ports_count == 1) 7198 size = min(size_remainder, 7199 MVPP22_TX_FIFO_DATA_SIZE_10KB); 7200 else if (port == 0) 7201 size = MVPP22_TX_FIFO_DATA_SIZE_10KB; 7202 else 7203 size = size_remainder / remaining_ports_count; 7204 7205 size_remainder -= size; 7206 remaining_ports_count--; 7207 7208 mvpp22_tx_fifo_set_hw(priv, port, size); 7209 } 7210 } 7211 7212 static void mvpp2_axi_init(struct mvpp2 *priv) 7213 { 7214 u32 val, rdval, wrval; 7215 7216 mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0); 7217 7218 /* AXI Bridge Configuration */ 7219 7220 rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE 7221 << MVPP22_AXI_ATTR_CACHE_OFFS; 7222 rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7223 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 7224 7225 wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE 7226 << MVPP22_AXI_ATTR_CACHE_OFFS; 7227 wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7228 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 7229 7230 /* BM */ 7231 mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval); 7232 mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval); 7233 7234 /* Descriptors */ 7235 mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval); 7236 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval); 7237 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval); 7238 mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval); 7239 7240 /* Buffer Data */ 7241 mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval); 7242 mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval); 7243 7244 val = MVPP22_AXI_CODE_CACHE_NON_CACHE 7245 << MVPP22_AXI_CODE_CACHE_OFFS; 7246 val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM 7247 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7248 mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val); 7249 mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val); 7250 7251 val = MVPP22_AXI_CODE_CACHE_RD_CACHE 7252 << MVPP22_AXI_CODE_CACHE_OFFS; 7253 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7254 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7255 7256 mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val); 7257 7258 val = MVPP22_AXI_CODE_CACHE_WR_CACHE 7259 << MVPP22_AXI_CODE_CACHE_OFFS; 7260 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7261 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7262 7263 mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val); 7264 } 7265 7266 /* Initialize network controller common part HW */ 7267 static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv) 7268 { 7269 const struct mbus_dram_target_info *dram_target_info; 7270 int err, i; 7271 u32 val; 7272 7273 /* MBUS windows configuration */ 7274 dram_target_info = mv_mbus_dram_info(); 7275 if (dram_target_info) 7276 mvpp2_conf_mbus_windows(dram_target_info, priv); 7277 7278 if (priv->hw_version >= MVPP22) 7279 mvpp2_axi_init(priv); 7280 7281 /* Disable HW PHY polling */ 7282 if (priv->hw_version == MVPP21) { 7283 val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 7284 val |= MVPP2_PHY_AN_STOP_SMI0_MASK; 7285 writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 7286 } else { 7287 val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 7288 val &= ~MVPP22_SMI_POLLING_EN; 7289 writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 7290 } 7291 7292 /* Allocate and initialize aggregated TXQs */ 7293 priv->aggr_txqs = devm_kcalloc(&pdev->dev, MVPP2_MAX_THREADS, 7294 sizeof(*priv->aggr_txqs), 7295 GFP_KERNEL); 7296 if (!priv->aggr_txqs) 7297 return -ENOMEM; 7298 7299 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7300 priv->aggr_txqs[i].id = i; 7301 priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE; 7302 err = mvpp2_aggr_txq_init(pdev, &priv->aggr_txqs[i], i, priv); 7303 if (err < 0) 7304 return err; 7305 } 7306 7307 /* Fifo Init */ 7308 if (priv->hw_version == MVPP21) { 7309 mvpp2_rx_fifo_init(priv); 7310 } else { 7311 mvpp22_rx_fifo_init(priv); 7312 mvpp22_tx_fifo_init(priv); 7313 if (priv->hw_version == MVPP23) 7314 mvpp23_rx_fifo_fc_set_tresh(priv); 7315 } 7316 7317 if (priv->hw_version == MVPP21) 7318 writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT, 7319 priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG); 7320 7321 /* Allow cache snoop when transmiting packets */ 7322 mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1); 7323 7324 /* Buffer Manager initialization */ 7325 err = mvpp2_bm_init(&pdev->dev, priv); 7326 if (err < 0) 7327 return err; 7328 7329 /* Parser default initialization */ 7330 err = mvpp2_prs_default_init(pdev, priv); 7331 if (err < 0) 7332 return err; 7333 7334 /* Classifier default initialization */ 7335 mvpp2_cls_init(priv); 7336 7337 return 0; 7338 } 7339 7340 static int mvpp2_get_sram(struct platform_device *pdev, 7341 struct mvpp2 *priv) 7342 { 7343 struct resource *res; 7344 7345 res = platform_get_resource(pdev, IORESOURCE_MEM, 2); 7346 if (!res) { 7347 if (has_acpi_companion(&pdev->dev)) 7348 dev_warn(&pdev->dev, "ACPI is too old, Flow control not supported\n"); 7349 else 7350 dev_warn(&pdev->dev, "DT is too old, Flow control not supported\n"); 7351 return 0; 7352 } 7353 7354 priv->cm3_base = devm_ioremap_resource(&pdev->dev, res); 7355 7356 return PTR_ERR_OR_ZERO(priv->cm3_base); 7357 } 7358 7359 static int mvpp2_probe(struct platform_device *pdev) 7360 { 7361 struct fwnode_handle *fwnode = pdev->dev.fwnode; 7362 struct fwnode_handle *port_fwnode; 7363 struct mvpp2 *priv; 7364 struct resource *res; 7365 void __iomem *base; 7366 int i, shared; 7367 int err; 7368 7369 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 7370 if (!priv) 7371 return -ENOMEM; 7372 7373 priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev); 7374 7375 /* multi queue mode isn't supported on PPV2.1, fallback to single 7376 * mode 7377 */ 7378 if (priv->hw_version == MVPP21) 7379 queue_mode = MVPP2_QDIST_SINGLE_MODE; 7380 7381 base = devm_platform_ioremap_resource(pdev, 0); 7382 if (IS_ERR(base)) 7383 return PTR_ERR(base); 7384 7385 if (priv->hw_version == MVPP21) { 7386 priv->lms_base = devm_platform_ioremap_resource(pdev, 1); 7387 if (IS_ERR(priv->lms_base)) 7388 return PTR_ERR(priv->lms_base); 7389 } else { 7390 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 7391 if (!res) { 7392 dev_err(&pdev->dev, "Invalid resource\n"); 7393 return -EINVAL; 7394 } 7395 if (has_acpi_companion(&pdev->dev)) { 7396 /* In case the MDIO memory region is declared in 7397 * the ACPI, it can already appear as 'in-use' 7398 * in the OS. Because it is overlapped by second 7399 * region of the network controller, make 7400 * sure it is released, before requesting it again. 7401 * The care is taken by mvpp2 driver to avoid 7402 * concurrent access to this memory region. 7403 */ 7404 release_resource(res); 7405 } 7406 priv->iface_base = devm_ioremap_resource(&pdev->dev, res); 7407 if (IS_ERR(priv->iface_base)) 7408 return PTR_ERR(priv->iface_base); 7409 7410 /* Map CM3 SRAM */ 7411 err = mvpp2_get_sram(pdev, priv); 7412 if (err) 7413 dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n"); 7414 7415 /* Enable global Flow Control only if handler to SRAM not NULL */ 7416 if (priv->cm3_base) 7417 priv->global_tx_fc = true; 7418 } 7419 7420 if (priv->hw_version >= MVPP22 && dev_of_node(&pdev->dev)) { 7421 priv->sysctrl_base = 7422 syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 7423 "marvell,system-controller"); 7424 if (IS_ERR(priv->sysctrl_base)) 7425 /* The system controller regmap is optional for dt 7426 * compatibility reasons. When not provided, the 7427 * configuration of the GoP relies on the 7428 * firmware/bootloader. 7429 */ 7430 priv->sysctrl_base = NULL; 7431 } 7432 7433 if (priv->hw_version >= MVPP22 && 7434 mvpp2_get_nrxqs(priv) * 2 <= MVPP2_BM_MAX_POOLS) 7435 priv->percpu_pools = 1; 7436 7437 mvpp2_setup_bm_pool(); 7438 7439 7440 priv->nthreads = min_t(unsigned int, num_present_cpus(), 7441 MVPP2_MAX_THREADS); 7442 7443 shared = num_present_cpus() - priv->nthreads; 7444 if (shared > 0) 7445 bitmap_fill(&priv->lock_map, 7446 min_t(int, shared, MVPP2_MAX_THREADS)); 7447 7448 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7449 u32 addr_space_sz; 7450 7451 addr_space_sz = (priv->hw_version == MVPP21 ? 7452 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ); 7453 priv->swth_base[i] = base + i * addr_space_sz; 7454 } 7455 7456 if (priv->hw_version == MVPP21) 7457 priv->max_port_rxqs = 8; 7458 else 7459 priv->max_port_rxqs = 32; 7460 7461 if (dev_of_node(&pdev->dev)) { 7462 priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk"); 7463 if (IS_ERR(priv->pp_clk)) 7464 return PTR_ERR(priv->pp_clk); 7465 err = clk_prepare_enable(priv->pp_clk); 7466 if (err < 0) 7467 return err; 7468 7469 priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk"); 7470 if (IS_ERR(priv->gop_clk)) { 7471 err = PTR_ERR(priv->gop_clk); 7472 goto err_pp_clk; 7473 } 7474 err = clk_prepare_enable(priv->gop_clk); 7475 if (err < 0) 7476 goto err_pp_clk; 7477 7478 if (priv->hw_version >= MVPP22) { 7479 priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk"); 7480 if (IS_ERR(priv->mg_clk)) { 7481 err = PTR_ERR(priv->mg_clk); 7482 goto err_gop_clk; 7483 } 7484 7485 err = clk_prepare_enable(priv->mg_clk); 7486 if (err < 0) 7487 goto err_gop_clk; 7488 7489 priv->mg_core_clk = devm_clk_get_optional(&pdev->dev, "mg_core_clk"); 7490 if (IS_ERR(priv->mg_core_clk)) { 7491 err = PTR_ERR(priv->mg_core_clk); 7492 goto err_mg_clk; 7493 } 7494 7495 err = clk_prepare_enable(priv->mg_core_clk); 7496 if (err < 0) 7497 goto err_mg_clk; 7498 } 7499 7500 priv->axi_clk = devm_clk_get_optional(&pdev->dev, "axi_clk"); 7501 if (IS_ERR(priv->axi_clk)) { 7502 err = PTR_ERR(priv->axi_clk); 7503 goto err_mg_core_clk; 7504 } 7505 7506 err = clk_prepare_enable(priv->axi_clk); 7507 if (err < 0) 7508 goto err_mg_core_clk; 7509 7510 /* Get system's tclk rate */ 7511 priv->tclk = clk_get_rate(priv->pp_clk); 7512 } else { 7513 err = device_property_read_u32(&pdev->dev, "clock-frequency", &priv->tclk); 7514 if (err) { 7515 dev_err(&pdev->dev, "missing clock-frequency value\n"); 7516 return err; 7517 } 7518 } 7519 7520 if (priv->hw_version >= MVPP22) { 7521 err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK); 7522 if (err) 7523 goto err_axi_clk; 7524 /* Sadly, the BM pools all share the same register to 7525 * store the high 32 bits of their address. So they 7526 * must all have the same high 32 bits, which forces 7527 * us to restrict coherent memory to DMA_BIT_MASK(32). 7528 */ 7529 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 7530 if (err) 7531 goto err_axi_clk; 7532 } 7533 7534 /* Map DTS-active ports. Should be done before FIFO mvpp2_init */ 7535 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 7536 if (!fwnode_property_read_u32(port_fwnode, "port-id", &i)) 7537 priv->port_map |= BIT(i); 7538 } 7539 7540 if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23) 7541 priv->hw_version = MVPP23; 7542 7543 /* Init mss lock */ 7544 spin_lock_init(&priv->mss_spinlock); 7545 7546 /* Initialize network controller */ 7547 err = mvpp2_init(pdev, priv); 7548 if (err < 0) { 7549 dev_err(&pdev->dev, "failed to initialize controller\n"); 7550 goto err_axi_clk; 7551 } 7552 7553 err = mvpp22_tai_probe(&pdev->dev, priv); 7554 if (err < 0) 7555 goto err_axi_clk; 7556 7557 /* Initialize ports */ 7558 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 7559 err = mvpp2_port_probe(pdev, port_fwnode, priv); 7560 if (err < 0) 7561 goto err_port_probe; 7562 } 7563 7564 if (priv->port_count == 0) { 7565 dev_err(&pdev->dev, "no ports enabled\n"); 7566 err = -ENODEV; 7567 goto err_axi_clk; 7568 } 7569 7570 /* Statistics must be gathered regularly because some of them (like 7571 * packets counters) are 32-bit registers and could overflow quite 7572 * quickly. For instance, a 10Gb link used at full bandwidth with the 7573 * smallest packets (64B) will overflow a 32-bit counter in less than 7574 * 30 seconds. Then, use a workqueue to fill 64-bit counters. 7575 */ 7576 snprintf(priv->queue_name, sizeof(priv->queue_name), 7577 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev), 7578 priv->port_count > 1 ? "+" : ""); 7579 priv->stats_queue = create_singlethread_workqueue(priv->queue_name); 7580 if (!priv->stats_queue) { 7581 err = -ENOMEM; 7582 goto err_port_probe; 7583 } 7584 7585 if (priv->global_tx_fc && priv->hw_version >= MVPP22) { 7586 err = mvpp2_enable_global_fc(priv); 7587 if (err) 7588 dev_warn(&pdev->dev, "Minimum of CM3 firmware 18.09 and chip revision B0 required for flow control\n"); 7589 } 7590 7591 mvpp2_dbgfs_init(priv, pdev->name); 7592 7593 platform_set_drvdata(pdev, priv); 7594 return 0; 7595 7596 err_port_probe: 7597 fwnode_handle_put(port_fwnode); 7598 7599 i = 0; 7600 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 7601 if (priv->port_list[i]) 7602 mvpp2_port_remove(priv->port_list[i]); 7603 i++; 7604 } 7605 err_axi_clk: 7606 clk_disable_unprepare(priv->axi_clk); 7607 err_mg_core_clk: 7608 clk_disable_unprepare(priv->mg_core_clk); 7609 err_mg_clk: 7610 clk_disable_unprepare(priv->mg_clk); 7611 err_gop_clk: 7612 clk_disable_unprepare(priv->gop_clk); 7613 err_pp_clk: 7614 clk_disable_unprepare(priv->pp_clk); 7615 return err; 7616 } 7617 7618 static int mvpp2_remove(struct platform_device *pdev) 7619 { 7620 struct mvpp2 *priv = platform_get_drvdata(pdev); 7621 struct fwnode_handle *fwnode = pdev->dev.fwnode; 7622 int i = 0, poolnum = MVPP2_BM_POOLS_NUM; 7623 struct fwnode_handle *port_fwnode; 7624 7625 mvpp2_dbgfs_cleanup(priv); 7626 7627 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 7628 if (priv->port_list[i]) { 7629 mutex_destroy(&priv->port_list[i]->gather_stats_lock); 7630 mvpp2_port_remove(priv->port_list[i]); 7631 } 7632 i++; 7633 } 7634 7635 destroy_workqueue(priv->stats_queue); 7636 7637 if (priv->percpu_pools) 7638 poolnum = mvpp2_get_nrxqs(priv) * 2; 7639 7640 for (i = 0; i < poolnum; i++) { 7641 struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i]; 7642 7643 mvpp2_bm_pool_destroy(&pdev->dev, priv, bm_pool); 7644 } 7645 7646 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7647 struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i]; 7648 7649 dma_free_coherent(&pdev->dev, 7650 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 7651 aggr_txq->descs, 7652 aggr_txq->descs_dma); 7653 } 7654 7655 if (is_acpi_node(port_fwnode)) 7656 return 0; 7657 7658 clk_disable_unprepare(priv->axi_clk); 7659 clk_disable_unprepare(priv->mg_core_clk); 7660 clk_disable_unprepare(priv->mg_clk); 7661 clk_disable_unprepare(priv->pp_clk); 7662 clk_disable_unprepare(priv->gop_clk); 7663 7664 return 0; 7665 } 7666 7667 static const struct of_device_id mvpp2_match[] = { 7668 { 7669 .compatible = "marvell,armada-375-pp2", 7670 .data = (void *)MVPP21, 7671 }, 7672 { 7673 .compatible = "marvell,armada-7k-pp22", 7674 .data = (void *)MVPP22, 7675 }, 7676 { } 7677 }; 7678 MODULE_DEVICE_TABLE(of, mvpp2_match); 7679 7680 #ifdef CONFIG_ACPI 7681 static const struct acpi_device_id mvpp2_acpi_match[] = { 7682 { "MRVL0110", MVPP22 }, 7683 { }, 7684 }; 7685 MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match); 7686 #endif 7687 7688 static struct platform_driver mvpp2_driver = { 7689 .probe = mvpp2_probe, 7690 .remove = mvpp2_remove, 7691 .driver = { 7692 .name = MVPP2_DRIVER_NAME, 7693 .of_match_table = mvpp2_match, 7694 .acpi_match_table = ACPI_PTR(mvpp2_acpi_match), 7695 }, 7696 }; 7697 7698 module_platform_driver(mvpp2_driver); 7699 7700 MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com"); 7701 MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>"); 7702 MODULE_LICENSE("GPL v2"); 7703