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/phy.h> 28 #include <linux/phylink.h> 29 #include <linux/phy/phy.h> 30 #include <linux/ptp_classify.h> 31 #include <linux/clk.h> 32 #include <linux/hrtimer.h> 33 #include <linux/ktime.h> 34 #include <linux/regmap.h> 35 #include <uapi/linux/ppp_defs.h> 36 #include <net/ip.h> 37 #include <net/ipv6.h> 38 #include <net/page_pool/helpers.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 /* Cleanup pool before actual initialization in the OS */ 618 static void mvpp2_bm_pool_cleanup(struct mvpp2 *priv, int pool_id) 619 { 620 unsigned int thread = mvpp2_cpu_to_thread(priv, get_cpu()); 621 u32 val; 622 int i; 623 624 /* Drain the BM from all possible residues left by firmware */ 625 for (i = 0; i < MVPP2_BM_POOL_SIZE_MAX; i++) 626 mvpp2_thread_read(priv, thread, MVPP2_BM_PHY_ALLOC_REG(pool_id)); 627 628 put_cpu(); 629 630 /* Stop the BM pool */ 631 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(pool_id)); 632 val |= MVPP2_BM_STOP_MASK; 633 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(pool_id), val); 634 } 635 636 static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv) 637 { 638 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 639 int i, err, poolnum = MVPP2_BM_POOLS_NUM; 640 struct mvpp2_port *port; 641 642 if (priv->percpu_pools) 643 poolnum = mvpp2_get_nrxqs(priv) * 2; 644 645 /* Clean up the pool state in case it contains stale state */ 646 for (i = 0; i < poolnum; i++) 647 mvpp2_bm_pool_cleanup(priv, i); 648 649 if (priv->percpu_pools) { 650 for (i = 0; i < priv->port_count; i++) { 651 port = priv->port_list[i]; 652 if (port->xdp_prog) { 653 dma_dir = DMA_BIDIRECTIONAL; 654 break; 655 } 656 } 657 658 for (i = 0; i < poolnum; i++) { 659 /* the pool in use */ 660 int pn = i / (poolnum / 2); 661 662 priv->page_pool[i] = 663 mvpp2_create_page_pool(dev, 664 mvpp2_pools[pn].buf_num, 665 mvpp2_pools[pn].pkt_size, 666 dma_dir); 667 if (IS_ERR(priv->page_pool[i])) { 668 int j; 669 670 for (j = 0; j < i; j++) { 671 page_pool_destroy(priv->page_pool[j]); 672 priv->page_pool[j] = NULL; 673 } 674 return PTR_ERR(priv->page_pool[i]); 675 } 676 } 677 } 678 679 dev_info(dev, "using %d %s buffers\n", poolnum, 680 priv->percpu_pools ? "per-cpu" : "shared"); 681 682 for (i = 0; i < poolnum; i++) { 683 /* Mask BM all interrupts */ 684 mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0); 685 /* Clear BM cause register */ 686 mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0); 687 } 688 689 /* Allocate and initialize BM pools */ 690 priv->bm_pools = devm_kcalloc(dev, poolnum, 691 sizeof(*priv->bm_pools), GFP_KERNEL); 692 if (!priv->bm_pools) 693 return -ENOMEM; 694 695 if (priv->hw_version == MVPP23) 696 mvpp23_bm_set_8pool_mode(priv); 697 698 err = mvpp2_bm_pools_init(dev, priv); 699 if (err < 0) 700 return err; 701 return 0; 702 } 703 704 static void mvpp2_setup_bm_pool(void) 705 { 706 /* Short pool */ 707 mvpp2_pools[MVPP2_BM_SHORT].buf_num = MVPP2_BM_SHORT_BUF_NUM; 708 mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE; 709 710 /* Long pool */ 711 mvpp2_pools[MVPP2_BM_LONG].buf_num = MVPP2_BM_LONG_BUF_NUM; 712 mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE; 713 714 /* Jumbo pool */ 715 mvpp2_pools[MVPP2_BM_JUMBO].buf_num = MVPP2_BM_JUMBO_BUF_NUM; 716 mvpp2_pools[MVPP2_BM_JUMBO].pkt_size = MVPP2_BM_JUMBO_PKT_SIZE; 717 } 718 719 /* Attach long pool to rxq */ 720 static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port, 721 int lrxq, int long_pool) 722 { 723 u32 val, mask; 724 int prxq; 725 726 /* Get queue physical ID */ 727 prxq = port->rxqs[lrxq]->id; 728 729 if (port->priv->hw_version == MVPP21) 730 mask = MVPP21_RXQ_POOL_LONG_MASK; 731 else 732 mask = MVPP22_RXQ_POOL_LONG_MASK; 733 734 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 735 val &= ~mask; 736 val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask; 737 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 738 } 739 740 /* Attach short pool to rxq */ 741 static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port, 742 int lrxq, int short_pool) 743 { 744 u32 val, mask; 745 int prxq; 746 747 /* Get queue physical ID */ 748 prxq = port->rxqs[lrxq]->id; 749 750 if (port->priv->hw_version == MVPP21) 751 mask = MVPP21_RXQ_POOL_SHORT_MASK; 752 else 753 mask = MVPP22_RXQ_POOL_SHORT_MASK; 754 755 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 756 val &= ~mask; 757 val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask; 758 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 759 } 760 761 static void *mvpp2_buf_alloc(struct mvpp2_port *port, 762 struct mvpp2_bm_pool *bm_pool, 763 struct page_pool *page_pool, 764 dma_addr_t *buf_dma_addr, 765 phys_addr_t *buf_phys_addr, 766 gfp_t gfp_mask) 767 { 768 dma_addr_t dma_addr; 769 struct page *page; 770 void *data; 771 772 data = mvpp2_frag_alloc(bm_pool, page_pool); 773 if (!data) 774 return NULL; 775 776 if (page_pool) { 777 page = (struct page *)data; 778 dma_addr = page_pool_get_dma_addr(page); 779 data = page_to_virt(page); 780 } else { 781 dma_addr = dma_map_single(port->dev->dev.parent, data, 782 MVPP2_RX_BUF_SIZE(bm_pool->pkt_size), 783 DMA_FROM_DEVICE); 784 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 785 mvpp2_frag_free(bm_pool, NULL, data); 786 return NULL; 787 } 788 } 789 *buf_dma_addr = dma_addr; 790 *buf_phys_addr = virt_to_phys(data); 791 792 return data; 793 } 794 795 /* Routine enable flow control for RXQs condition */ 796 static void mvpp2_rxq_enable_fc(struct mvpp2_port *port) 797 { 798 int val, cm3_state, host_id, q; 799 int fq = port->first_rxq; 800 unsigned long flags; 801 802 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 803 804 /* Remove Flow control enable bit to prevent race between FW and Kernel 805 * If Flow control was enabled, it would be re-enabled. 806 */ 807 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 808 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 809 val &= ~FLOW_CONTROL_ENABLE_BIT; 810 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 811 812 /* Set same Flow control for all RXQs */ 813 for (q = 0; q < port->nrxqs; q++) { 814 /* Set stop and start Flow control RXQ thresholds */ 815 val = MSS_THRESHOLD_START; 816 val |= (MSS_THRESHOLD_STOP << MSS_RXQ_TRESH_STOP_OFFS); 817 mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val); 818 819 val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq)); 820 /* Set RXQ port ID */ 821 val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq)); 822 val |= (port->id << MSS_RXQ_ASS_Q_BASE(q, fq)); 823 val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq) 824 + MSS_RXQ_ASS_HOSTID_OFFS)); 825 826 /* Calculate RXQ host ID: 827 * In Single queue mode: Host ID equal to Host ID used for 828 * shared RX interrupt 829 * In Multi queue mode: Host ID equal to number of 830 * RXQ ID / number of CoS queues 831 * In Single resource mode: Host ID always equal to 0 832 */ 833 if (queue_mode == MVPP2_QDIST_SINGLE_MODE) 834 host_id = port->nqvecs; 835 else if (queue_mode == MVPP2_QDIST_MULTI_MODE) 836 host_id = q; 837 else 838 host_id = 0; 839 840 /* Set RXQ host ID */ 841 val |= (host_id << (MSS_RXQ_ASS_Q_BASE(q, fq) 842 + MSS_RXQ_ASS_HOSTID_OFFS)); 843 844 mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val); 845 } 846 847 /* Notify Firmware that Flow control config space ready for update */ 848 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 849 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 850 val |= cm3_state; 851 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 852 853 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 854 } 855 856 /* Routine disable flow control for RXQs condition */ 857 static void mvpp2_rxq_disable_fc(struct mvpp2_port *port) 858 { 859 int val, cm3_state, q; 860 unsigned long flags; 861 int fq = port->first_rxq; 862 863 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 864 865 /* Remove Flow control enable bit to prevent race between FW and Kernel 866 * If Flow control was enabled, it would be re-enabled. 867 */ 868 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 869 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 870 val &= ~FLOW_CONTROL_ENABLE_BIT; 871 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 872 873 /* Disable Flow control for all RXQs */ 874 for (q = 0; q < port->nrxqs; q++) { 875 /* Set threshold 0 to disable Flow control */ 876 val = 0; 877 val |= (0 << MSS_RXQ_TRESH_STOP_OFFS); 878 mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val); 879 880 val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq)); 881 882 val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq)); 883 884 val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq) 885 + MSS_RXQ_ASS_HOSTID_OFFS)); 886 887 mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val); 888 } 889 890 /* Notify Firmware that Flow control config space ready for update */ 891 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 892 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 893 val |= cm3_state; 894 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 895 896 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 897 } 898 899 /* Routine disable/enable flow control for BM pool condition */ 900 static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port, 901 struct mvpp2_bm_pool *pool, 902 bool en) 903 { 904 int val, cm3_state; 905 unsigned long flags; 906 907 spin_lock_irqsave(&port->priv->mss_spinlock, flags); 908 909 /* Remove Flow control enable bit to prevent race between FW and Kernel 910 * If Flow control were enabled, it would be re-enabled. 911 */ 912 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 913 cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); 914 val &= ~FLOW_CONTROL_ENABLE_BIT; 915 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 916 917 /* Check if BM pool should be enabled/disable */ 918 if (en) { 919 /* Set BM pool start and stop thresholds per port */ 920 val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); 921 val |= MSS_BUF_POOL_PORT_OFFS(port->id); 922 val &= ~MSS_BUF_POOL_START_MASK; 923 val |= (MSS_THRESHOLD_START << MSS_BUF_POOL_START_OFFS); 924 val &= ~MSS_BUF_POOL_STOP_MASK; 925 val |= MSS_THRESHOLD_STOP; 926 mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); 927 } else { 928 /* Remove BM pool from the port */ 929 val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); 930 val &= ~MSS_BUF_POOL_PORT_OFFS(port->id); 931 932 /* Zero BM pool start and stop thresholds to disable pool 933 * flow control if pool empty (not used by any port) 934 */ 935 if (!pool->buf_num) { 936 val &= ~MSS_BUF_POOL_START_MASK; 937 val &= ~MSS_BUF_POOL_STOP_MASK; 938 } 939 940 mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); 941 } 942 943 /* Notify Firmware that Flow control config space ready for update */ 944 val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); 945 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 946 val |= cm3_state; 947 mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); 948 949 spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); 950 } 951 952 /* disable/enable flow control for BM pool on all ports */ 953 static void mvpp2_bm_pool_update_priv_fc(struct mvpp2 *priv, bool en) 954 { 955 struct mvpp2_port *port; 956 int i, j; 957 958 for (i = 0; i < priv->port_count; i++) { 959 port = priv->port_list[i]; 960 if (port->priv->percpu_pools) { 961 for (j = 0; j < port->nrxqs; j++) 962 mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[j], 963 port->tx_fc & en); 964 } else { 965 mvpp2_bm_pool_update_fc(port, port->pool_long, port->tx_fc & en); 966 mvpp2_bm_pool_update_fc(port, port->pool_short, port->tx_fc & en); 967 } 968 } 969 } 970 971 static int mvpp2_enable_global_fc(struct mvpp2 *priv) 972 { 973 int val, timeout = 0; 974 975 /* Enable global flow control. In this stage global 976 * flow control enabled, but still disabled per port. 977 */ 978 val = mvpp2_cm3_read(priv, MSS_FC_COM_REG); 979 val |= FLOW_CONTROL_ENABLE_BIT; 980 mvpp2_cm3_write(priv, MSS_FC_COM_REG, val); 981 982 /* Check if Firmware running and disable FC if not*/ 983 val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; 984 mvpp2_cm3_write(priv, MSS_FC_COM_REG, val); 985 986 while (timeout < MSS_FC_MAX_TIMEOUT) { 987 val = mvpp2_cm3_read(priv, MSS_FC_COM_REG); 988 989 if (!(val & FLOW_CONTROL_UPDATE_COMMAND_BIT)) 990 return 0; 991 usleep_range(10, 20); 992 timeout++; 993 } 994 995 priv->global_tx_fc = false; 996 return -EOPNOTSUPP; 997 } 998 999 /* Release buffer to BM */ 1000 static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, 1001 dma_addr_t buf_dma_addr, 1002 phys_addr_t buf_phys_addr) 1003 { 1004 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 1005 unsigned long flags = 0; 1006 1007 if (test_bit(thread, &port->priv->lock_map)) 1008 spin_lock_irqsave(&port->bm_lock[thread], flags); 1009 1010 if (port->priv->hw_version >= MVPP22) { 1011 u32 val = 0; 1012 1013 if (sizeof(dma_addr_t) == 8) 1014 val |= upper_32_bits(buf_dma_addr) & 1015 MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK; 1016 1017 if (sizeof(phys_addr_t) == 8) 1018 val |= (upper_32_bits(buf_phys_addr) 1019 << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) & 1020 MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK; 1021 1022 mvpp2_thread_write_relaxed(port->priv, thread, 1023 MVPP22_BM_ADDR_HIGH_RLS_REG, val); 1024 } 1025 1026 /* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply 1027 * returned in the "cookie" field of the RX 1028 * descriptor. Instead of storing the virtual address, we 1029 * store the physical address 1030 */ 1031 mvpp2_thread_write_relaxed(port->priv, thread, 1032 MVPP2_BM_VIRT_RLS_REG, buf_phys_addr); 1033 mvpp2_thread_write_relaxed(port->priv, thread, 1034 MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr); 1035 1036 if (test_bit(thread, &port->priv->lock_map)) 1037 spin_unlock_irqrestore(&port->bm_lock[thread], flags); 1038 1039 put_cpu(); 1040 } 1041 1042 /* Allocate buffers for the pool */ 1043 static int mvpp2_bm_bufs_add(struct mvpp2_port *port, 1044 struct mvpp2_bm_pool *bm_pool, int buf_num) 1045 { 1046 int i, buf_size, total_size; 1047 dma_addr_t dma_addr; 1048 phys_addr_t phys_addr; 1049 struct page_pool *pp = NULL; 1050 void *buf; 1051 1052 if (port->priv->percpu_pools && 1053 bm_pool->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 1054 netdev_err(port->dev, 1055 "attempted to use jumbo frames with per-cpu pools"); 1056 return 0; 1057 } 1058 1059 buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size); 1060 total_size = MVPP2_RX_TOTAL_SIZE(buf_size); 1061 1062 if (buf_num < 0 || 1063 (buf_num + bm_pool->buf_num > bm_pool->size)) { 1064 netdev_err(port->dev, 1065 "cannot allocate %d buffers for pool %d\n", 1066 buf_num, bm_pool->id); 1067 return 0; 1068 } 1069 1070 if (port->priv->percpu_pools) 1071 pp = port->priv->page_pool[bm_pool->id]; 1072 for (i = 0; i < buf_num; i++) { 1073 buf = mvpp2_buf_alloc(port, bm_pool, pp, &dma_addr, 1074 &phys_addr, GFP_KERNEL); 1075 if (!buf) 1076 break; 1077 1078 mvpp2_bm_pool_put(port, bm_pool->id, dma_addr, 1079 phys_addr); 1080 } 1081 1082 /* Update BM driver with number of buffers added to pool */ 1083 bm_pool->buf_num += i; 1084 1085 netdev_dbg(port->dev, 1086 "pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n", 1087 bm_pool->id, bm_pool->pkt_size, buf_size, total_size); 1088 1089 netdev_dbg(port->dev, 1090 "pool %d: %d of %d buffers added\n", 1091 bm_pool->id, i, buf_num); 1092 return i; 1093 } 1094 1095 /* Notify the driver that BM pool is being used as specific type and return the 1096 * pool pointer on success 1097 */ 1098 static struct mvpp2_bm_pool * 1099 mvpp2_bm_pool_use(struct mvpp2_port *port, unsigned pool, int pkt_size) 1100 { 1101 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 1102 int num; 1103 1104 if ((port->priv->percpu_pools && pool > mvpp2_get_nrxqs(port->priv) * 2) || 1105 (!port->priv->percpu_pools && pool >= MVPP2_BM_POOLS_NUM)) { 1106 netdev_err(port->dev, "Invalid pool %d\n", pool); 1107 return NULL; 1108 } 1109 1110 /* Allocate buffers in case BM pool is used as long pool, but packet 1111 * size doesn't match MTU or BM pool hasn't being used yet 1112 */ 1113 if (new_pool->pkt_size == 0) { 1114 int pkts_num; 1115 1116 /* Set default buffer number or free all the buffers in case 1117 * the pool is not empty 1118 */ 1119 pkts_num = new_pool->buf_num; 1120 if (pkts_num == 0) { 1121 if (port->priv->percpu_pools) { 1122 if (pool < port->nrxqs) 1123 pkts_num = mvpp2_pools[MVPP2_BM_SHORT].buf_num; 1124 else 1125 pkts_num = mvpp2_pools[MVPP2_BM_LONG].buf_num; 1126 } else { 1127 pkts_num = mvpp2_pools[pool].buf_num; 1128 } 1129 } else { 1130 mvpp2_bm_bufs_free(port->dev->dev.parent, 1131 port->priv, new_pool, pkts_num); 1132 } 1133 1134 new_pool->pkt_size = pkt_size; 1135 new_pool->frag_size = 1136 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 1137 MVPP2_SKB_SHINFO_SIZE; 1138 1139 /* Allocate buffers for this pool */ 1140 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 1141 if (num != pkts_num) { 1142 WARN(1, "pool %d: %d of %d allocated\n", 1143 new_pool->id, num, pkts_num); 1144 return NULL; 1145 } 1146 } 1147 1148 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 1149 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 1150 1151 return new_pool; 1152 } 1153 1154 static struct mvpp2_bm_pool * 1155 mvpp2_bm_pool_use_percpu(struct mvpp2_port *port, int type, 1156 unsigned int pool, int pkt_size) 1157 { 1158 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 1159 int num; 1160 1161 if (pool > port->nrxqs * 2) { 1162 netdev_err(port->dev, "Invalid pool %d\n", pool); 1163 return NULL; 1164 } 1165 1166 /* Allocate buffers in case BM pool is used as long pool, but packet 1167 * size doesn't match MTU or BM pool hasn't being used yet 1168 */ 1169 if (new_pool->pkt_size == 0) { 1170 int pkts_num; 1171 1172 /* Set default buffer number or free all the buffers in case 1173 * the pool is not empty 1174 */ 1175 pkts_num = new_pool->buf_num; 1176 if (pkts_num == 0) 1177 pkts_num = mvpp2_pools[type].buf_num; 1178 else 1179 mvpp2_bm_bufs_free(port->dev->dev.parent, 1180 port->priv, new_pool, pkts_num); 1181 1182 new_pool->pkt_size = pkt_size; 1183 new_pool->frag_size = 1184 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 1185 MVPP2_SKB_SHINFO_SIZE; 1186 1187 /* Allocate buffers for this pool */ 1188 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 1189 if (num != pkts_num) { 1190 WARN(1, "pool %d: %d of %d allocated\n", 1191 new_pool->id, num, pkts_num); 1192 return NULL; 1193 } 1194 } 1195 1196 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 1197 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 1198 1199 return new_pool; 1200 } 1201 1202 /* Initialize pools for swf, shared buffers variant */ 1203 static int mvpp2_swf_bm_pool_init_shared(struct mvpp2_port *port) 1204 { 1205 enum mvpp2_bm_pool_log_num long_log_pool, short_log_pool; 1206 int rxq; 1207 1208 /* If port pkt_size is higher than 1518B: 1209 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 1210 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 1211 */ 1212 if (port->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 1213 long_log_pool = MVPP2_BM_JUMBO; 1214 short_log_pool = MVPP2_BM_LONG; 1215 } else { 1216 long_log_pool = MVPP2_BM_LONG; 1217 short_log_pool = MVPP2_BM_SHORT; 1218 } 1219 1220 if (!port->pool_long) { 1221 port->pool_long = 1222 mvpp2_bm_pool_use(port, long_log_pool, 1223 mvpp2_pools[long_log_pool].pkt_size); 1224 if (!port->pool_long) 1225 return -ENOMEM; 1226 1227 port->pool_long->port_map |= BIT(port->id); 1228 1229 for (rxq = 0; rxq < port->nrxqs; rxq++) 1230 mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id); 1231 } 1232 1233 if (!port->pool_short) { 1234 port->pool_short = 1235 mvpp2_bm_pool_use(port, short_log_pool, 1236 mvpp2_pools[short_log_pool].pkt_size); 1237 if (!port->pool_short) 1238 return -ENOMEM; 1239 1240 port->pool_short->port_map |= BIT(port->id); 1241 1242 for (rxq = 0; rxq < port->nrxqs; rxq++) 1243 mvpp2_rxq_short_pool_set(port, rxq, 1244 port->pool_short->id); 1245 } 1246 1247 return 0; 1248 } 1249 1250 /* Initialize pools for swf, percpu buffers variant */ 1251 static int mvpp2_swf_bm_pool_init_percpu(struct mvpp2_port *port) 1252 { 1253 struct mvpp2_bm_pool *bm_pool; 1254 int i; 1255 1256 for (i = 0; i < port->nrxqs; i++) { 1257 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_SHORT, i, 1258 mvpp2_pools[MVPP2_BM_SHORT].pkt_size); 1259 if (!bm_pool) 1260 return -ENOMEM; 1261 1262 bm_pool->port_map |= BIT(port->id); 1263 mvpp2_rxq_short_pool_set(port, i, bm_pool->id); 1264 } 1265 1266 for (i = 0; i < port->nrxqs; i++) { 1267 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_LONG, i + port->nrxqs, 1268 mvpp2_pools[MVPP2_BM_LONG].pkt_size); 1269 if (!bm_pool) 1270 return -ENOMEM; 1271 1272 bm_pool->port_map |= BIT(port->id); 1273 mvpp2_rxq_long_pool_set(port, i, bm_pool->id); 1274 } 1275 1276 port->pool_long = NULL; 1277 port->pool_short = NULL; 1278 1279 return 0; 1280 } 1281 1282 static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port) 1283 { 1284 if (port->priv->percpu_pools) 1285 return mvpp2_swf_bm_pool_init_percpu(port); 1286 else 1287 return mvpp2_swf_bm_pool_init_shared(port); 1288 } 1289 1290 static void mvpp2_set_hw_csum(struct mvpp2_port *port, 1291 enum mvpp2_bm_pool_log_num new_long_pool) 1292 { 1293 const netdev_features_t csums = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1294 1295 /* Update L4 checksum when jumbo enable/disable on port. 1296 * Only port 0 supports hardware checksum offload due to 1297 * the Tx FIFO size limitation. 1298 * Also, don't set NETIF_F_HW_CSUM because L3_offset in TX descriptor 1299 * has 7 bits, so the maximum L3 offset is 128. 1300 */ 1301 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 1302 port->dev->features &= ~csums; 1303 port->dev->hw_features &= ~csums; 1304 } else { 1305 port->dev->features |= csums; 1306 port->dev->hw_features |= csums; 1307 } 1308 } 1309 1310 static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) 1311 { 1312 struct mvpp2_port *port = netdev_priv(dev); 1313 enum mvpp2_bm_pool_log_num new_long_pool; 1314 int pkt_size = MVPP2_RX_PKT_SIZE(mtu); 1315 1316 if (port->priv->percpu_pools) 1317 goto out_set; 1318 1319 /* If port MTU is higher than 1518B: 1320 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 1321 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 1322 */ 1323 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1324 new_long_pool = MVPP2_BM_JUMBO; 1325 else 1326 new_long_pool = MVPP2_BM_LONG; 1327 1328 if (new_long_pool != port->pool_long->id) { 1329 if (port->tx_fc) { 1330 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1331 mvpp2_bm_pool_update_fc(port, 1332 port->pool_short, 1333 false); 1334 else 1335 mvpp2_bm_pool_update_fc(port, port->pool_long, 1336 false); 1337 } 1338 1339 /* Remove port from old short & long pool */ 1340 port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id, 1341 port->pool_long->pkt_size); 1342 port->pool_long->port_map &= ~BIT(port->id); 1343 port->pool_long = NULL; 1344 1345 port->pool_short = mvpp2_bm_pool_use(port, port->pool_short->id, 1346 port->pool_short->pkt_size); 1347 port->pool_short->port_map &= ~BIT(port->id); 1348 port->pool_short = NULL; 1349 1350 port->pkt_size = pkt_size; 1351 1352 /* Add port to new short & long pool */ 1353 mvpp2_swf_bm_pool_init(port); 1354 1355 mvpp2_set_hw_csum(port, new_long_pool); 1356 1357 if (port->tx_fc) { 1358 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1359 mvpp2_bm_pool_update_fc(port, port->pool_long, 1360 true); 1361 else 1362 mvpp2_bm_pool_update_fc(port, port->pool_short, 1363 true); 1364 } 1365 1366 /* Update L4 checksum when jumbo enable/disable on port */ 1367 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 1368 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); 1369 dev->hw_features &= ~(NETIF_F_IP_CSUM | 1370 NETIF_F_IPV6_CSUM); 1371 } else { 1372 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1373 dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1374 } 1375 } 1376 1377 out_set: 1378 WRITE_ONCE(dev->mtu, mtu); 1379 dev->wanted_features = dev->features; 1380 1381 netdev_update_features(dev); 1382 return 0; 1383 } 1384 1385 static inline void mvpp2_interrupts_enable(struct mvpp2_port *port) 1386 { 1387 int i, sw_thread_mask = 0; 1388 1389 for (i = 0; i < port->nqvecs; i++) 1390 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1391 1392 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1393 MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask)); 1394 } 1395 1396 static inline void mvpp2_interrupts_disable(struct mvpp2_port *port) 1397 { 1398 int i, sw_thread_mask = 0; 1399 1400 for (i = 0; i < port->nqvecs; i++) 1401 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1402 1403 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1404 MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask)); 1405 } 1406 1407 static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec) 1408 { 1409 struct mvpp2_port *port = qvec->port; 1410 1411 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1412 MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask)); 1413 } 1414 1415 static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) 1416 { 1417 struct mvpp2_port *port = qvec->port; 1418 1419 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1420 MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask)); 1421 } 1422 1423 /* Mask the current thread's Rx/Tx interrupts 1424 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1425 * using smp_processor_id() is OK. 1426 */ 1427 static void mvpp2_interrupts_mask(void *arg) 1428 { 1429 struct mvpp2_port *port = arg; 1430 int cpu = smp_processor_id(); 1431 u32 thread; 1432 1433 /* If the thread isn't used, don't do anything */ 1434 if (cpu > port->priv->nthreads) 1435 return; 1436 1437 thread = mvpp2_cpu_to_thread(port->priv, cpu); 1438 1439 mvpp2_thread_write(port->priv, thread, 1440 MVPP2_ISR_RX_TX_MASK_REG(port->id), 0); 1441 mvpp2_thread_write(port->priv, thread, 1442 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 0); 1443 } 1444 1445 /* Unmask the current thread's Rx/Tx interrupts. 1446 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1447 * using smp_processor_id() is OK. 1448 */ 1449 static void mvpp2_interrupts_unmask(void *arg) 1450 { 1451 struct mvpp2_port *port = arg; 1452 int cpu = smp_processor_id(); 1453 u32 val, thread; 1454 1455 /* If the thread isn't used, don't do anything */ 1456 if (cpu >= port->priv->nthreads) 1457 return; 1458 1459 thread = mvpp2_cpu_to_thread(port->priv, cpu); 1460 1461 val = MVPP2_CAUSE_MISC_SUM_MASK | 1462 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 1463 if (port->has_tx_irqs) 1464 val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 1465 1466 mvpp2_thread_write(port->priv, thread, 1467 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1468 mvpp2_thread_write(port->priv, thread, 1469 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 1470 MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); 1471 } 1472 1473 static void 1474 mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask) 1475 { 1476 u32 val; 1477 int i; 1478 1479 if (port->priv->hw_version == MVPP21) 1480 return; 1481 1482 if (mask) 1483 val = 0; 1484 else 1485 val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(MVPP22); 1486 1487 for (i = 0; i < port->nqvecs; i++) { 1488 struct mvpp2_queue_vector *v = port->qvecs + i; 1489 1490 if (v->type != MVPP2_QUEUE_VECTOR_SHARED) 1491 continue; 1492 1493 mvpp2_thread_write(port->priv, v->sw_thread_id, 1494 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1495 mvpp2_thread_write(port->priv, v->sw_thread_id, 1496 MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 1497 MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); 1498 } 1499 } 1500 1501 /* Only GOP port 0 has an XLG MAC */ 1502 static bool mvpp2_port_supports_xlg(struct mvpp2_port *port) 1503 { 1504 return port->gop_id == 0; 1505 } 1506 1507 static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port) 1508 { 1509 return !(port->priv->hw_version >= MVPP22 && port->gop_id == 0); 1510 } 1511 1512 /* Port configuration routines */ 1513 static bool mvpp2_is_xlg(phy_interface_t interface) 1514 { 1515 return interface == PHY_INTERFACE_MODE_10GBASER || 1516 interface == PHY_INTERFACE_MODE_5GBASER || 1517 interface == PHY_INTERFACE_MODE_XAUI; 1518 } 1519 1520 static void mvpp2_modify(void __iomem *ptr, u32 mask, u32 set) 1521 { 1522 u32 old, val; 1523 1524 old = val = readl(ptr); 1525 val &= ~mask; 1526 val |= set; 1527 if (old != val) 1528 writel(val, ptr); 1529 } 1530 1531 static void mvpp22_gop_init_rgmii(struct mvpp2_port *port) 1532 { 1533 struct mvpp2 *priv = port->priv; 1534 u32 val; 1535 1536 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1537 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT; 1538 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1539 1540 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1541 if (port->gop_id == 2) { 1542 val |= GENCONF_CTRL0_PORT2_RGMII; 1543 } else if (port->gop_id == 3) { 1544 val |= GENCONF_CTRL0_PORT3_RGMII_MII; 1545 1546 /* According to the specification, GENCONF_CTRL0_PORT3_RGMII 1547 * should be set to 1 for RGMII and 0 for MII. However, tests 1548 * show that it is the other way around. This is also what 1549 * U-Boot does for mvpp2, so it is assumed to be correct. 1550 */ 1551 if (port->phy_interface == PHY_INTERFACE_MODE_MII) 1552 val |= GENCONF_CTRL0_PORT3_RGMII; 1553 else 1554 val &= ~GENCONF_CTRL0_PORT3_RGMII; 1555 } 1556 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1557 } 1558 1559 static void mvpp22_gop_init_sgmii(struct mvpp2_port *port) 1560 { 1561 struct mvpp2 *priv = port->priv; 1562 u32 val; 1563 1564 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1565 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT | 1566 GENCONF_PORT_CTRL0_RX_DATA_SAMPLE; 1567 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1568 1569 if (port->gop_id > 1) { 1570 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1571 if (port->gop_id == 2) 1572 val &= ~GENCONF_CTRL0_PORT2_RGMII; 1573 else if (port->gop_id == 3) 1574 val &= ~GENCONF_CTRL0_PORT3_RGMII_MII; 1575 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1576 } 1577 } 1578 1579 static void mvpp22_gop_init_10gkr(struct mvpp2_port *port) 1580 { 1581 struct mvpp2 *priv = port->priv; 1582 void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 1583 void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 1584 u32 val; 1585 1586 val = readl(xpcs + MVPP22_XPCS_CFG0); 1587 val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) | 1588 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3)); 1589 val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2); 1590 writel(val, xpcs + MVPP22_XPCS_CFG0); 1591 1592 val = readl(mpcs + MVPP22_MPCS_CTRL); 1593 val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN; 1594 writel(val, mpcs + MVPP22_MPCS_CTRL); 1595 1596 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1597 val &= ~MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7); 1598 val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1); 1599 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1600 } 1601 1602 static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en) 1603 { 1604 struct mvpp2 *priv = port->priv; 1605 void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); 1606 u32 val; 1607 1608 val = readl(fca + MVPP22_FCA_CONTROL_REG); 1609 val &= ~MVPP22_FCA_ENABLE_PERIODIC; 1610 if (en) 1611 val |= MVPP22_FCA_ENABLE_PERIODIC; 1612 writel(val, fca + MVPP22_FCA_CONTROL_REG); 1613 } 1614 1615 static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer) 1616 { 1617 struct mvpp2 *priv = port->priv; 1618 void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); 1619 u32 lsb, msb; 1620 1621 lsb = timer & MVPP22_FCA_REG_MASK; 1622 msb = timer >> MVPP22_FCA_REG_SIZE; 1623 1624 writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG); 1625 writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG); 1626 } 1627 1628 /* Set Flow Control timer x100 faster than pause quanta to ensure that link 1629 * partner won't send traffic if port is in XOFF mode. 1630 */ 1631 static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port) 1632 { 1633 u32 timer; 1634 1635 timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER)) 1636 * FC_QUANTA; 1637 1638 mvpp22_gop_fca_enable_periodic(port, false); 1639 1640 mvpp22_gop_fca_set_timer(port, timer); 1641 1642 mvpp22_gop_fca_enable_periodic(port, true); 1643 } 1644 1645 static int mvpp22_gop_init(struct mvpp2_port *port, phy_interface_t interface) 1646 { 1647 struct mvpp2 *priv = port->priv; 1648 u32 val; 1649 1650 if (!priv->sysctrl_base) 1651 return 0; 1652 1653 switch (interface) { 1654 case PHY_INTERFACE_MODE_MII: 1655 case PHY_INTERFACE_MODE_RGMII: 1656 case PHY_INTERFACE_MODE_RGMII_ID: 1657 case PHY_INTERFACE_MODE_RGMII_RXID: 1658 case PHY_INTERFACE_MODE_RGMII_TXID: 1659 if (!mvpp2_port_supports_rgmii(port)) 1660 goto invalid_conf; 1661 mvpp22_gop_init_rgmii(port); 1662 break; 1663 case PHY_INTERFACE_MODE_SGMII: 1664 case PHY_INTERFACE_MODE_1000BASEX: 1665 case PHY_INTERFACE_MODE_2500BASEX: 1666 mvpp22_gop_init_sgmii(port); 1667 break; 1668 case PHY_INTERFACE_MODE_5GBASER: 1669 case PHY_INTERFACE_MODE_10GBASER: 1670 if (!mvpp2_port_supports_xlg(port)) 1671 goto invalid_conf; 1672 mvpp22_gop_init_10gkr(port); 1673 break; 1674 default: 1675 goto unsupported_conf; 1676 } 1677 1678 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val); 1679 val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) | 1680 GENCONF_PORT_CTRL1_EN(port->gop_id); 1681 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val); 1682 1683 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1684 val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR; 1685 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1686 1687 regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val); 1688 val |= GENCONF_SOFT_RESET1_GOP; 1689 regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val); 1690 1691 mvpp22_gop_fca_set_periodic_timer(port); 1692 1693 unsupported_conf: 1694 return 0; 1695 1696 invalid_conf: 1697 netdev_err(port->dev, "Invalid port configuration\n"); 1698 return -EINVAL; 1699 } 1700 1701 static void mvpp22_gop_unmask_irq(struct mvpp2_port *port) 1702 { 1703 u32 val; 1704 1705 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1706 phy_interface_mode_is_8023z(port->phy_interface) || 1707 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1708 /* Enable the GMAC link status irq for this port */ 1709 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1710 val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1711 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1712 } 1713 1714 if (mvpp2_port_supports_xlg(port)) { 1715 /* Enable the XLG/GIG irqs for this port */ 1716 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1717 if (mvpp2_is_xlg(port->phy_interface)) 1718 val |= MVPP22_XLG_EXT_INT_MASK_XLG; 1719 else 1720 val |= MVPP22_XLG_EXT_INT_MASK_GIG; 1721 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1722 } 1723 } 1724 1725 static void mvpp22_gop_mask_irq(struct mvpp2_port *port) 1726 { 1727 u32 val; 1728 1729 if (mvpp2_port_supports_xlg(port)) { 1730 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1731 val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG | 1732 MVPP22_XLG_EXT_INT_MASK_GIG); 1733 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1734 } 1735 1736 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1737 phy_interface_mode_is_8023z(port->phy_interface) || 1738 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1739 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1740 val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1741 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1742 } 1743 } 1744 1745 static void mvpp22_gop_setup_irq(struct mvpp2_port *port) 1746 { 1747 u32 val; 1748 1749 mvpp2_modify(port->base + MVPP22_GMAC_INT_SUM_MASK, 1750 MVPP22_GMAC_INT_SUM_MASK_PTP, 1751 MVPP22_GMAC_INT_SUM_MASK_PTP); 1752 1753 if (port->phylink || 1754 phy_interface_mode_is_rgmii(port->phy_interface) || 1755 phy_interface_mode_is_8023z(port->phy_interface) || 1756 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1757 val = readl(port->base + MVPP22_GMAC_INT_MASK); 1758 val |= MVPP22_GMAC_INT_MASK_LINK_STAT; 1759 writel(val, port->base + MVPP22_GMAC_INT_MASK); 1760 } 1761 1762 if (mvpp2_port_supports_xlg(port)) { 1763 val = readl(port->base + MVPP22_XLG_INT_MASK); 1764 val |= MVPP22_XLG_INT_MASK_LINK; 1765 writel(val, port->base + MVPP22_XLG_INT_MASK); 1766 1767 mvpp2_modify(port->base + MVPP22_XLG_EXT_INT_MASK, 1768 MVPP22_XLG_EXT_INT_MASK_PTP, 1769 MVPP22_XLG_EXT_INT_MASK_PTP); 1770 } 1771 1772 mvpp22_gop_unmask_irq(port); 1773 } 1774 1775 /* Sets the PHY mode of the COMPHY (which configures the serdes lanes). 1776 * 1777 * The PHY mode used by the PPv2 driver comes from the network subsystem, while 1778 * the one given to the COMPHY comes from the generic PHY subsystem. Hence they 1779 * differ. 1780 * 1781 * The COMPHY configures the serdes lanes regardless of the actual use of the 1782 * lanes by the physical layer. This is why configurations like 1783 * "PPv2 (2500BaseX) - COMPHY (2500SGMII)" are valid. 1784 */ 1785 static int mvpp22_comphy_init(struct mvpp2_port *port, 1786 phy_interface_t interface) 1787 { 1788 int ret; 1789 1790 if (!port->comphy) 1791 return 0; 1792 1793 ret = phy_set_mode_ext(port->comphy, PHY_MODE_ETHERNET, interface); 1794 if (ret) 1795 return ret; 1796 1797 return phy_power_on(port->comphy); 1798 } 1799 1800 static void mvpp2_port_enable(struct mvpp2_port *port) 1801 { 1802 u32 val; 1803 1804 if (mvpp2_port_supports_xlg(port) && 1805 mvpp2_is_xlg(port->phy_interface)) { 1806 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1807 val |= MVPP22_XLG_CTRL0_PORT_EN; 1808 val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS; 1809 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1810 } else { 1811 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1812 val |= MVPP2_GMAC_PORT_EN_MASK; 1813 val |= MVPP2_GMAC_MIB_CNTR_EN_MASK; 1814 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1815 } 1816 } 1817 1818 static void mvpp2_port_disable(struct mvpp2_port *port) 1819 { 1820 u32 val; 1821 1822 if (mvpp2_port_supports_xlg(port) && 1823 mvpp2_is_xlg(port->phy_interface)) { 1824 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1825 val &= ~MVPP22_XLG_CTRL0_PORT_EN; 1826 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1827 } 1828 1829 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1830 val &= ~(MVPP2_GMAC_PORT_EN_MASK); 1831 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1832 } 1833 1834 /* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */ 1835 static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port) 1836 { 1837 u32 val; 1838 1839 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) & 1840 ~MVPP2_GMAC_PERIODIC_XON_EN_MASK; 1841 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1842 } 1843 1844 /* Configure loopback port */ 1845 static void mvpp2_port_loopback_set(struct mvpp2_port *port, 1846 const struct phylink_link_state *state) 1847 { 1848 u32 val; 1849 1850 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 1851 1852 if (state->speed == 1000) 1853 val |= MVPP2_GMAC_GMII_LB_EN_MASK; 1854 else 1855 val &= ~MVPP2_GMAC_GMII_LB_EN_MASK; 1856 1857 if (phy_interface_mode_is_8023z(state->interface) || 1858 state->interface == PHY_INTERFACE_MODE_SGMII) 1859 val |= MVPP2_GMAC_PCS_LB_EN_MASK; 1860 else 1861 val &= ~MVPP2_GMAC_PCS_LB_EN_MASK; 1862 1863 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1864 } 1865 1866 enum { 1867 ETHTOOL_XDP_REDIRECT, 1868 ETHTOOL_XDP_PASS, 1869 ETHTOOL_XDP_DROP, 1870 ETHTOOL_XDP_TX, 1871 ETHTOOL_XDP_TX_ERR, 1872 ETHTOOL_XDP_XMIT, 1873 ETHTOOL_XDP_XMIT_ERR, 1874 }; 1875 1876 struct mvpp2_ethtool_counter { 1877 unsigned int offset; 1878 const char string[ETH_GSTRING_LEN]; 1879 bool reg_is_64b; 1880 }; 1881 1882 static u64 mvpp2_read_count(struct mvpp2_port *port, 1883 const struct mvpp2_ethtool_counter *counter) 1884 { 1885 u64 val; 1886 1887 val = readl(port->stats_base + counter->offset); 1888 if (counter->reg_is_64b) 1889 val += (u64)readl(port->stats_base + counter->offset + 4) << 32; 1890 1891 return val; 1892 } 1893 1894 /* Some counters are accessed indirectly by first writing an index to 1895 * MVPP2_CTRS_IDX. The index can represent various resources depending on the 1896 * register we access, it can be a hit counter for some classification tables, 1897 * a counter specific to a rxq, a txq or a buffer pool. 1898 */ 1899 static u32 mvpp2_read_index(struct mvpp2 *priv, u32 index, u32 reg) 1900 { 1901 mvpp2_write(priv, MVPP2_CTRS_IDX, index); 1902 return mvpp2_read(priv, reg); 1903 } 1904 1905 /* Due to the fact that software statistics and hardware statistics are, by 1906 * design, incremented at different moments in the chain of packet processing, 1907 * it is very likely that incoming packets could have been dropped after being 1908 * counted by hardware but before reaching software statistics (most probably 1909 * multicast packets), and in the opposite way, during transmission, FCS bytes 1910 * are added in between as well as TSO skb will be split and header bytes added. 1911 * Hence, statistics gathered from userspace with ifconfig (software) and 1912 * ethtool (hardware) cannot be compared. 1913 */ 1914 static const struct mvpp2_ethtool_counter mvpp2_ethtool_mib_regs[] = { 1915 { MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true }, 1916 { MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" }, 1917 { MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" }, 1918 { MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" }, 1919 { MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" }, 1920 { MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" }, 1921 { MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" }, 1922 { MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" }, 1923 { MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" }, 1924 { MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" }, 1925 { MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" }, 1926 { MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" }, 1927 { MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true }, 1928 { MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" }, 1929 { MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" }, 1930 { MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" }, 1931 { MVPP2_MIB_FC_SENT, "fc_sent" }, 1932 { MVPP2_MIB_FC_RCVD, "fc_received" }, 1933 { MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" }, 1934 { MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" }, 1935 { MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" }, 1936 { MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" }, 1937 { MVPP2_MIB_JABBER_RCVD, "jabber_received" }, 1938 { MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" }, 1939 { MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" }, 1940 { MVPP2_MIB_COLLISION, "collision" }, 1941 { MVPP2_MIB_LATE_COLLISION, "late_collision" }, 1942 }; 1943 1944 static const struct mvpp2_ethtool_counter mvpp2_ethtool_port_regs[] = { 1945 { MVPP2_OVERRUN_ETH_DROP, "rx_fifo_or_parser_overrun_drops" }, 1946 { MVPP2_CLS_ETH_DROP, "rx_classifier_drops" }, 1947 }; 1948 1949 static const struct mvpp2_ethtool_counter mvpp2_ethtool_txq_regs[] = { 1950 { MVPP2_TX_DESC_ENQ_CTR, "txq_%d_desc_enqueue" }, 1951 { MVPP2_TX_DESC_ENQ_TO_DDR_CTR, "txq_%d_desc_enqueue_to_ddr" }, 1952 { MVPP2_TX_BUFF_ENQ_TO_DDR_CTR, "txq_%d_buff_euqueue_to_ddr" }, 1953 { MVPP2_TX_DESC_ENQ_HW_FWD_CTR, "txq_%d_desc_hardware_forwarded" }, 1954 { MVPP2_TX_PKTS_DEQ_CTR, "txq_%d_packets_dequeued" }, 1955 { MVPP2_TX_PKTS_FULL_QUEUE_DROP_CTR, "txq_%d_queue_full_drops" }, 1956 { MVPP2_TX_PKTS_EARLY_DROP_CTR, "txq_%d_packets_early_drops" }, 1957 { MVPP2_TX_PKTS_BM_DROP_CTR, "txq_%d_packets_bm_drops" }, 1958 { MVPP2_TX_PKTS_BM_MC_DROP_CTR, "txq_%d_packets_rep_bm_drops" }, 1959 }; 1960 1961 static const struct mvpp2_ethtool_counter mvpp2_ethtool_rxq_regs[] = { 1962 { MVPP2_RX_DESC_ENQ_CTR, "rxq_%d_desc_enqueue" }, 1963 { MVPP2_RX_PKTS_FULL_QUEUE_DROP_CTR, "rxq_%d_queue_full_drops" }, 1964 { MVPP2_RX_PKTS_EARLY_DROP_CTR, "rxq_%d_packets_early_drops" }, 1965 { MVPP2_RX_PKTS_BM_DROP_CTR, "rxq_%d_packets_bm_drops" }, 1966 }; 1967 1968 static const struct mvpp2_ethtool_counter mvpp2_ethtool_xdp[] = { 1969 { ETHTOOL_XDP_REDIRECT, "rx_xdp_redirect", }, 1970 { ETHTOOL_XDP_PASS, "rx_xdp_pass", }, 1971 { ETHTOOL_XDP_DROP, "rx_xdp_drop", }, 1972 { ETHTOOL_XDP_TX, "rx_xdp_tx", }, 1973 { ETHTOOL_XDP_TX_ERR, "rx_xdp_tx_errors", }, 1974 { ETHTOOL_XDP_XMIT, "tx_xdp_xmit", }, 1975 { ETHTOOL_XDP_XMIT_ERR, "tx_xdp_xmit_errors", }, 1976 }; 1977 1978 #define MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs) (ARRAY_SIZE(mvpp2_ethtool_mib_regs) + \ 1979 ARRAY_SIZE(mvpp2_ethtool_port_regs) + \ 1980 (ARRAY_SIZE(mvpp2_ethtool_txq_regs) * (ntxqs)) + \ 1981 (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)) + \ 1982 ARRAY_SIZE(mvpp2_ethtool_xdp)) 1983 1984 static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset, 1985 u8 *data) 1986 { 1987 struct mvpp2_port *port = netdev_priv(netdev); 1988 int i, q; 1989 1990 if (sset != ETH_SS_STATS) 1991 return; 1992 1993 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) { 1994 strscpy(data, mvpp2_ethtool_mib_regs[i].string, 1995 ETH_GSTRING_LEN); 1996 data += ETH_GSTRING_LEN; 1997 } 1998 1999 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) { 2000 strscpy(data, mvpp2_ethtool_port_regs[i].string, 2001 ETH_GSTRING_LEN); 2002 data += ETH_GSTRING_LEN; 2003 } 2004 2005 for (q = 0; q < port->ntxqs; q++) { 2006 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) { 2007 snprintf(data, ETH_GSTRING_LEN, 2008 mvpp2_ethtool_txq_regs[i].string, q); 2009 data += ETH_GSTRING_LEN; 2010 } 2011 } 2012 2013 for (q = 0; q < port->nrxqs; q++) { 2014 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) { 2015 snprintf(data, ETH_GSTRING_LEN, 2016 mvpp2_ethtool_rxq_regs[i].string, 2017 q); 2018 data += ETH_GSTRING_LEN; 2019 } 2020 } 2021 2022 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_xdp); i++) { 2023 strscpy(data, mvpp2_ethtool_xdp[i].string, 2024 ETH_GSTRING_LEN); 2025 data += ETH_GSTRING_LEN; 2026 } 2027 } 2028 2029 static void 2030 mvpp2_get_xdp_stats(struct mvpp2_port *port, struct mvpp2_pcpu_stats *xdp_stats) 2031 { 2032 unsigned int start; 2033 unsigned int cpu; 2034 2035 /* Gather XDP Statistics */ 2036 for_each_possible_cpu(cpu) { 2037 struct mvpp2_pcpu_stats *cpu_stats; 2038 u64 xdp_redirect; 2039 u64 xdp_pass; 2040 u64 xdp_drop; 2041 u64 xdp_xmit; 2042 u64 xdp_xmit_err; 2043 u64 xdp_tx; 2044 u64 xdp_tx_err; 2045 2046 cpu_stats = per_cpu_ptr(port->stats, cpu); 2047 do { 2048 start = u64_stats_fetch_begin(&cpu_stats->syncp); 2049 xdp_redirect = cpu_stats->xdp_redirect; 2050 xdp_pass = cpu_stats->xdp_pass; 2051 xdp_drop = cpu_stats->xdp_drop; 2052 xdp_xmit = cpu_stats->xdp_xmit; 2053 xdp_xmit_err = cpu_stats->xdp_xmit_err; 2054 xdp_tx = cpu_stats->xdp_tx; 2055 xdp_tx_err = cpu_stats->xdp_tx_err; 2056 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start)); 2057 2058 xdp_stats->xdp_redirect += xdp_redirect; 2059 xdp_stats->xdp_pass += xdp_pass; 2060 xdp_stats->xdp_drop += xdp_drop; 2061 xdp_stats->xdp_xmit += xdp_xmit; 2062 xdp_stats->xdp_xmit_err += xdp_xmit_err; 2063 xdp_stats->xdp_tx += xdp_tx; 2064 xdp_stats->xdp_tx_err += xdp_tx_err; 2065 } 2066 } 2067 2068 static void mvpp2_read_stats(struct mvpp2_port *port) 2069 { 2070 struct mvpp2_pcpu_stats xdp_stats = {}; 2071 const struct mvpp2_ethtool_counter *s; 2072 u64 *pstats; 2073 int i, q; 2074 2075 pstats = port->ethtool_stats; 2076 2077 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) 2078 *pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_mib_regs[i]); 2079 2080 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) 2081 *pstats++ += mvpp2_read(port->priv, 2082 mvpp2_ethtool_port_regs[i].offset + 2083 4 * port->id); 2084 2085 for (q = 0; q < port->ntxqs; q++) 2086 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) 2087 *pstats++ += mvpp2_read_index(port->priv, 2088 MVPP22_CTRS_TX_CTR(port->id, q), 2089 mvpp2_ethtool_txq_regs[i].offset); 2090 2091 /* Rxqs are numbered from 0 from the user standpoint, but not from the 2092 * driver's. We need to add the port->first_rxq offset. 2093 */ 2094 for (q = 0; q < port->nrxqs; q++) 2095 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) 2096 *pstats++ += mvpp2_read_index(port->priv, 2097 port->first_rxq + q, 2098 mvpp2_ethtool_rxq_regs[i].offset); 2099 2100 /* Gather XDP Statistics */ 2101 mvpp2_get_xdp_stats(port, &xdp_stats); 2102 2103 for (i = 0, s = mvpp2_ethtool_xdp; 2104 s < mvpp2_ethtool_xdp + ARRAY_SIZE(mvpp2_ethtool_xdp); 2105 s++, i++) { 2106 switch (s->offset) { 2107 case ETHTOOL_XDP_REDIRECT: 2108 *pstats++ = xdp_stats.xdp_redirect; 2109 break; 2110 case ETHTOOL_XDP_PASS: 2111 *pstats++ = xdp_stats.xdp_pass; 2112 break; 2113 case ETHTOOL_XDP_DROP: 2114 *pstats++ = xdp_stats.xdp_drop; 2115 break; 2116 case ETHTOOL_XDP_TX: 2117 *pstats++ = xdp_stats.xdp_tx; 2118 break; 2119 case ETHTOOL_XDP_TX_ERR: 2120 *pstats++ = xdp_stats.xdp_tx_err; 2121 break; 2122 case ETHTOOL_XDP_XMIT: 2123 *pstats++ = xdp_stats.xdp_xmit; 2124 break; 2125 case ETHTOOL_XDP_XMIT_ERR: 2126 *pstats++ = xdp_stats.xdp_xmit_err; 2127 break; 2128 } 2129 } 2130 } 2131 2132 static void mvpp2_gather_hw_statistics(struct work_struct *work) 2133 { 2134 struct delayed_work *del_work = to_delayed_work(work); 2135 struct mvpp2_port *port = container_of(del_work, struct mvpp2_port, 2136 stats_work); 2137 2138 mutex_lock(&port->gather_stats_lock); 2139 2140 mvpp2_read_stats(port); 2141 2142 /* No need to read again the counters right after this function if it 2143 * was called asynchronously by the user (ie. use of ethtool). 2144 */ 2145 cancel_delayed_work(&port->stats_work); 2146 queue_delayed_work(port->priv->stats_queue, &port->stats_work, 2147 MVPP2_MIB_COUNTERS_STATS_DELAY); 2148 2149 mutex_unlock(&port->gather_stats_lock); 2150 } 2151 2152 static void mvpp2_ethtool_get_stats(struct net_device *dev, 2153 struct ethtool_stats *stats, u64 *data) 2154 { 2155 struct mvpp2_port *port = netdev_priv(dev); 2156 2157 /* Update statistics for the given port, then take the lock to avoid 2158 * concurrent accesses on the ethtool_stats structure during its copy. 2159 */ 2160 mvpp2_gather_hw_statistics(&port->stats_work.work); 2161 2162 mutex_lock(&port->gather_stats_lock); 2163 memcpy(data, port->ethtool_stats, 2164 sizeof(u64) * MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs)); 2165 mutex_unlock(&port->gather_stats_lock); 2166 } 2167 2168 static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset) 2169 { 2170 struct mvpp2_port *port = netdev_priv(dev); 2171 2172 if (sset == ETH_SS_STATS) 2173 return MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs); 2174 2175 return -EOPNOTSUPP; 2176 } 2177 2178 static void mvpp2_mac_reset_assert(struct mvpp2_port *port) 2179 { 2180 u32 val; 2181 2182 val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) | 2183 MVPP2_GMAC_PORT_RESET_MASK; 2184 writel(val, port->base + MVPP2_GMAC_CTRL_2_REG); 2185 2186 if (port->priv->hw_version >= MVPP22 && port->gop_id == 0) { 2187 val = readl(port->base + MVPP22_XLG_CTRL0_REG) & 2188 ~MVPP22_XLG_CTRL0_MAC_RESET_DIS; 2189 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 2190 } 2191 } 2192 2193 static void mvpp22_pcs_reset_assert(struct mvpp2_port *port) 2194 { 2195 struct mvpp2 *priv = port->priv; 2196 void __iomem *mpcs, *xpcs; 2197 u32 val; 2198 2199 if (port->priv->hw_version == MVPP21 || port->gop_id != 0) 2200 return; 2201 2202 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 2203 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 2204 2205 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 2206 val &= ~(MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX); 2207 val |= MVPP22_MPCS_CLK_RESET_DIV_SET; 2208 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 2209 2210 val = readl(xpcs + MVPP22_XPCS_CFG0); 2211 writel(val & ~MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 2212 } 2213 2214 static void mvpp22_pcs_reset_deassert(struct mvpp2_port *port, 2215 phy_interface_t interface) 2216 { 2217 struct mvpp2 *priv = port->priv; 2218 void __iomem *mpcs, *xpcs; 2219 u32 val; 2220 2221 if (port->priv->hw_version == MVPP21 || port->gop_id != 0) 2222 return; 2223 2224 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 2225 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 2226 2227 switch (interface) { 2228 case PHY_INTERFACE_MODE_5GBASER: 2229 case PHY_INTERFACE_MODE_10GBASER: 2230 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 2231 val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | 2232 MAC_CLK_RESET_SD_TX; 2233 val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET; 2234 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 2235 break; 2236 case PHY_INTERFACE_MODE_XAUI: 2237 case PHY_INTERFACE_MODE_RXAUI: 2238 val = readl(xpcs + MVPP22_XPCS_CFG0); 2239 writel(val | MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 2240 break; 2241 default: 2242 break; 2243 } 2244 } 2245 2246 /* Change maximum receive size of the port */ 2247 static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port) 2248 { 2249 u32 val; 2250 2251 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 2252 val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK; 2253 val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) << 2254 MVPP2_GMAC_MAX_RX_SIZE_OFFS); 2255 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 2256 } 2257 2258 /* Change maximum receive size of the port */ 2259 static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port) 2260 { 2261 u32 val; 2262 2263 val = readl(port->base + MVPP22_XLG_CTRL1_REG); 2264 val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK; 2265 val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) << 2266 MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS; 2267 writel(val, port->base + MVPP22_XLG_CTRL1_REG); 2268 } 2269 2270 /* Set defaults to the MVPP2 port */ 2271 static void mvpp2_defaults_set(struct mvpp2_port *port) 2272 { 2273 int tx_port_num, val, queue, lrxq; 2274 2275 if (port->priv->hw_version == MVPP21) { 2276 /* Update TX FIFO MIN Threshold */ 2277 val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 2278 val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK; 2279 /* Min. TX threshold must be less than minimal packet length */ 2280 val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2); 2281 writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 2282 } 2283 2284 /* Disable Legacy WRR, Disable EJP, Release from reset */ 2285 tx_port_num = mvpp2_egress_port(port); 2286 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, 2287 tx_port_num); 2288 mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0); 2289 2290 /* Set TXQ scheduling to Round-Robin */ 2291 mvpp2_write(port->priv, MVPP2_TXP_SCHED_FIXED_PRIO_REG, 0); 2292 2293 /* Close bandwidth for all queues */ 2294 for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) 2295 mvpp2_write(port->priv, 2296 MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(queue), 0); 2297 2298 /* Set refill period to 1 usec, refill tokens 2299 * and bucket size to maximum 2300 */ 2301 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG, 2302 port->priv->tclk / USEC_PER_SEC); 2303 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG); 2304 val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK; 2305 val |= MVPP2_TXP_REFILL_PERIOD_MASK(1); 2306 val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK; 2307 mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val); 2308 val = MVPP2_TXP_TOKEN_SIZE_MAX; 2309 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 2310 2311 /* Set MaximumLowLatencyPacketSize value to 256 */ 2312 mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id), 2313 MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK | 2314 MVPP2_RX_LOW_LATENCY_PKT_SIZE(256)); 2315 2316 /* Enable Rx cache snoop */ 2317 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2318 queue = port->rxqs[lrxq]->id; 2319 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2320 val |= MVPP2_SNOOP_PKT_SIZE_MASK | 2321 MVPP2_SNOOP_BUF_HDR_MASK; 2322 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2323 } 2324 2325 /* At default, mask all interrupts to all present cpus */ 2326 mvpp2_interrupts_disable(port); 2327 } 2328 2329 /* Enable/disable receiving packets */ 2330 static void mvpp2_ingress_enable(struct mvpp2_port *port) 2331 { 2332 u32 val; 2333 int lrxq, queue; 2334 2335 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2336 queue = port->rxqs[lrxq]->id; 2337 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2338 val &= ~MVPP2_RXQ_DISABLE_MASK; 2339 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2340 } 2341 } 2342 2343 static void mvpp2_ingress_disable(struct mvpp2_port *port) 2344 { 2345 u32 val; 2346 int lrxq, queue; 2347 2348 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 2349 queue = port->rxqs[lrxq]->id; 2350 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 2351 val |= MVPP2_RXQ_DISABLE_MASK; 2352 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 2353 } 2354 } 2355 2356 /* Enable transmit via physical egress queue 2357 * - HW starts take descriptors from DRAM 2358 */ 2359 static void mvpp2_egress_enable(struct mvpp2_port *port) 2360 { 2361 u32 qmap; 2362 int queue; 2363 int tx_port_num = mvpp2_egress_port(port); 2364 2365 /* Enable all initialized TXs. */ 2366 qmap = 0; 2367 for (queue = 0; queue < port->ntxqs; queue++) { 2368 struct mvpp2_tx_queue *txq = port->txqs[queue]; 2369 2370 if (txq->descs) 2371 qmap |= (1 << queue); 2372 } 2373 2374 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2375 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap); 2376 } 2377 2378 /* Disable transmit via physical egress queue 2379 * - HW doesn't take descriptors from DRAM 2380 */ 2381 static void mvpp2_egress_disable(struct mvpp2_port *port) 2382 { 2383 u32 reg_data; 2384 int delay; 2385 int tx_port_num = mvpp2_egress_port(port); 2386 2387 /* Issue stop command for active channels only */ 2388 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2389 reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) & 2390 MVPP2_TXP_SCHED_ENQ_MASK; 2391 if (reg_data != 0) 2392 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, 2393 (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET)); 2394 2395 /* Wait for all Tx activity to terminate. */ 2396 delay = 0; 2397 do { 2398 if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) { 2399 netdev_warn(port->dev, 2400 "Tx stop timed out, status=0x%08x\n", 2401 reg_data); 2402 break; 2403 } 2404 mdelay(1); 2405 delay++; 2406 2407 /* Check port TX Command register that all 2408 * Tx queues are stopped 2409 */ 2410 reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG); 2411 } while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK); 2412 } 2413 2414 /* Rx descriptors helper methods */ 2415 2416 /* Get number of Rx descriptors occupied by received packets */ 2417 static inline int 2418 mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id) 2419 { 2420 u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id)); 2421 2422 return val & MVPP2_RXQ_OCCUPIED_MASK; 2423 } 2424 2425 /* Update Rx queue status with the number of occupied and available 2426 * Rx descriptor slots. 2427 */ 2428 static inline void 2429 mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id, 2430 int used_count, int free_count) 2431 { 2432 /* Decrement the number of used descriptors and increment count 2433 * increment the number of free descriptors. 2434 */ 2435 u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET); 2436 2437 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val); 2438 } 2439 2440 /* Get pointer to next RX descriptor to be processed by SW */ 2441 static inline struct mvpp2_rx_desc * 2442 mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq) 2443 { 2444 int rx_desc = rxq->next_desc_to_proc; 2445 2446 rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc); 2447 prefetch(rxq->descs + rxq->next_desc_to_proc); 2448 return rxq->descs + rx_desc; 2449 } 2450 2451 /* Set rx queue offset */ 2452 static void mvpp2_rxq_offset_set(struct mvpp2_port *port, 2453 int prxq, int offset) 2454 { 2455 u32 val; 2456 2457 /* Convert offset from bytes to units of 32 bytes */ 2458 offset = offset >> 5; 2459 2460 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 2461 val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK; 2462 2463 /* Offset is in */ 2464 val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) & 2465 MVPP2_RXQ_PACKET_OFFSET_MASK); 2466 2467 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 2468 } 2469 2470 /* Tx descriptors helper methods */ 2471 2472 /* Get pointer to next Tx descriptor to be processed (send) by HW */ 2473 static struct mvpp2_tx_desc * 2474 mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq) 2475 { 2476 int tx_desc = txq->next_desc_to_proc; 2477 2478 txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc); 2479 return txq->descs + tx_desc; 2480 } 2481 2482 /* Update HW with number of aggregated Tx descriptors to be sent 2483 * 2484 * Called only from mvpp2_tx(), so migration is disabled, using 2485 * smp_processor_id() is OK. 2486 */ 2487 static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending) 2488 { 2489 /* aggregated access - relevant TXQ number is written in TX desc */ 2490 mvpp2_thread_write(port->priv, 2491 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2492 MVPP2_AGGR_TXQ_UPDATE_REG, pending); 2493 } 2494 2495 /* Check if there are enough free descriptors in aggregated txq. 2496 * If not, update the number of occupied descriptors and repeat the check. 2497 * 2498 * Called only from mvpp2_tx(), so migration is disabled, using 2499 * smp_processor_id() is OK. 2500 */ 2501 static int mvpp2_aggr_desc_num_check(struct mvpp2_port *port, 2502 struct mvpp2_tx_queue *aggr_txq, int num) 2503 { 2504 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) { 2505 /* Update number of occupied aggregated Tx descriptors */ 2506 unsigned int thread = 2507 mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2508 u32 val = mvpp2_read_relaxed(port->priv, 2509 MVPP2_AGGR_TXQ_STATUS_REG(thread)); 2510 2511 aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK; 2512 2513 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) 2514 return -ENOMEM; 2515 } 2516 return 0; 2517 } 2518 2519 /* Reserved Tx descriptors allocation request 2520 * 2521 * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called 2522 * only by mvpp2_tx(), so migration is disabled, using 2523 * smp_processor_id() is OK. 2524 */ 2525 static int mvpp2_txq_alloc_reserved_desc(struct mvpp2_port *port, 2526 struct mvpp2_tx_queue *txq, int num) 2527 { 2528 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2529 struct mvpp2 *priv = port->priv; 2530 u32 val; 2531 2532 val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num; 2533 mvpp2_thread_write_relaxed(priv, thread, MVPP2_TXQ_RSVD_REQ_REG, val); 2534 2535 val = mvpp2_thread_read_relaxed(priv, thread, MVPP2_TXQ_RSVD_RSLT_REG); 2536 2537 return val & MVPP2_TXQ_RSVD_RSLT_MASK; 2538 } 2539 2540 /* Check if there are enough reserved descriptors for transmission. 2541 * If not, request chunk of reserved descriptors and check again. 2542 */ 2543 static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2_port *port, 2544 struct mvpp2_tx_queue *txq, 2545 struct mvpp2_txq_pcpu *txq_pcpu, 2546 int num) 2547 { 2548 int req, desc_count; 2549 unsigned int thread; 2550 2551 if (txq_pcpu->reserved_num >= num) 2552 return 0; 2553 2554 /* Not enough descriptors reserved! Update the reserved descriptor 2555 * count and check again. 2556 */ 2557 2558 desc_count = 0; 2559 /* Compute total of used descriptors */ 2560 for (thread = 0; thread < port->priv->nthreads; thread++) { 2561 struct mvpp2_txq_pcpu *txq_pcpu_aux; 2562 2563 txq_pcpu_aux = per_cpu_ptr(txq->pcpu, thread); 2564 desc_count += txq_pcpu_aux->count; 2565 desc_count += txq_pcpu_aux->reserved_num; 2566 } 2567 2568 req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num); 2569 desc_count += req; 2570 2571 if (desc_count > 2572 (txq->size - (MVPP2_MAX_THREADS * MVPP2_CPU_DESC_CHUNK))) 2573 return -ENOMEM; 2574 2575 txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(port, txq, req); 2576 2577 /* OK, the descriptor could have been updated: check again. */ 2578 if (txq_pcpu->reserved_num < num) 2579 return -ENOMEM; 2580 return 0; 2581 } 2582 2583 /* Release the last allocated Tx descriptor. Useful to handle DMA 2584 * mapping failures in the Tx path. 2585 */ 2586 static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq) 2587 { 2588 if (txq->next_desc_to_proc == 0) 2589 txq->next_desc_to_proc = txq->last_desc - 1; 2590 else 2591 txq->next_desc_to_proc--; 2592 } 2593 2594 /* Set Tx descriptors fields relevant for CSUM calculation */ 2595 static u32 mvpp2_txq_desc_csum(int l3_offs, __be16 l3_proto, 2596 int ip_hdr_len, int l4_proto) 2597 { 2598 u32 command; 2599 2600 /* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, 2601 * G_L4_chk, L4_type required only for checksum calculation 2602 */ 2603 command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT); 2604 command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT); 2605 command |= MVPP2_TXD_IP_CSUM_DISABLE; 2606 2607 if (l3_proto == htons(ETH_P_IP)) { 2608 command &= ~MVPP2_TXD_IP_CSUM_DISABLE; /* enable IPv4 csum */ 2609 command &= ~MVPP2_TXD_L3_IP6; /* enable IPv4 */ 2610 } else { 2611 command |= MVPP2_TXD_L3_IP6; /* enable IPv6 */ 2612 } 2613 2614 if (l4_proto == IPPROTO_TCP) { 2615 command &= ~MVPP2_TXD_L4_UDP; /* enable TCP */ 2616 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2617 } else if (l4_proto == IPPROTO_UDP) { 2618 command |= MVPP2_TXD_L4_UDP; /* enable UDP */ 2619 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2620 } else { 2621 command |= MVPP2_TXD_L4_CSUM_NOT; 2622 } 2623 2624 return command; 2625 } 2626 2627 /* Get number of sent descriptors and decrement counter. 2628 * The number of sent descriptors is returned. 2629 * Per-thread access 2630 * 2631 * Called only from mvpp2_txq_done(), called from mvpp2_tx() 2632 * (migration disabled) and from the TX completion tasklet (migration 2633 * disabled) so using smp_processor_id() is OK. 2634 */ 2635 static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port, 2636 struct mvpp2_tx_queue *txq) 2637 { 2638 u32 val; 2639 2640 /* Reading status reg resets transmitted descriptor counter */ 2641 val = mvpp2_thread_read_relaxed(port->priv, 2642 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2643 MVPP2_TXQ_SENT_REG(txq->id)); 2644 2645 return (val & MVPP2_TRANSMITTED_COUNT_MASK) >> 2646 MVPP2_TRANSMITTED_COUNT_OFFSET; 2647 } 2648 2649 /* Called through on_each_cpu(), so runs on all CPUs, with migration 2650 * disabled, therefore using smp_processor_id() is OK. 2651 */ 2652 static void mvpp2_txq_sent_counter_clear(void *arg) 2653 { 2654 struct mvpp2_port *port = arg; 2655 int queue; 2656 2657 /* If the thread isn't used, don't do anything */ 2658 if (smp_processor_id() >= port->priv->nthreads) 2659 return; 2660 2661 for (queue = 0; queue < port->ntxqs; queue++) { 2662 int id = port->txqs[queue]->id; 2663 2664 mvpp2_thread_read(port->priv, 2665 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2666 MVPP2_TXQ_SENT_REG(id)); 2667 } 2668 } 2669 2670 /* Set max sizes for Tx queues */ 2671 static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port) 2672 { 2673 u32 val, size, mtu; 2674 int txq, tx_port_num; 2675 2676 mtu = port->pkt_size * 8; 2677 if (mtu > MVPP2_TXP_MTU_MAX) 2678 mtu = MVPP2_TXP_MTU_MAX; 2679 2680 /* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */ 2681 mtu = 3 * mtu; 2682 2683 /* Indirect access to registers */ 2684 tx_port_num = mvpp2_egress_port(port); 2685 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2686 2687 /* Set MTU */ 2688 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG); 2689 val &= ~MVPP2_TXP_MTU_MAX; 2690 val |= mtu; 2691 mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val); 2692 2693 /* TXP token size and all TXQs token size must be larger that MTU */ 2694 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG); 2695 size = val & MVPP2_TXP_TOKEN_SIZE_MAX; 2696 if (size < mtu) { 2697 size = mtu; 2698 val &= ~MVPP2_TXP_TOKEN_SIZE_MAX; 2699 val |= size; 2700 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 2701 } 2702 2703 for (txq = 0; txq < port->ntxqs; txq++) { 2704 val = mvpp2_read(port->priv, 2705 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq)); 2706 size = val & MVPP2_TXQ_TOKEN_SIZE_MAX; 2707 2708 if (size < mtu) { 2709 size = mtu; 2710 val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX; 2711 val |= size; 2712 mvpp2_write(port->priv, 2713 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq), 2714 val); 2715 } 2716 } 2717 } 2718 2719 /* Set the number of non-occupied descriptors threshold */ 2720 static void mvpp2_set_rxq_free_tresh(struct mvpp2_port *port, 2721 struct mvpp2_rx_queue *rxq) 2722 { 2723 u32 val; 2724 2725 mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id); 2726 2727 val = mvpp2_read(port->priv, MVPP2_RXQ_THRESH_REG); 2728 val &= ~MVPP2_RXQ_NON_OCCUPIED_MASK; 2729 val |= MSS_THRESHOLD_STOP << MVPP2_RXQ_NON_OCCUPIED_OFFSET; 2730 mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val); 2731 } 2732 2733 /* Set the number of packets that will be received before Rx interrupt 2734 * will be generated by HW. 2735 */ 2736 static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port, 2737 struct mvpp2_rx_queue *rxq) 2738 { 2739 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2740 2741 if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK) 2742 rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK; 2743 2744 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2745 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_THRESH_REG, 2746 rxq->pkts_coal); 2747 2748 put_cpu(); 2749 } 2750 2751 /* For some reason in the LSP this is done on each CPU. Why ? */ 2752 static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port, 2753 struct mvpp2_tx_queue *txq) 2754 { 2755 unsigned int thread; 2756 u32 val; 2757 2758 if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK) 2759 txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK; 2760 2761 val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET); 2762 /* PKT-coalescing registers are per-queue + per-thread */ 2763 for (thread = 0; thread < MVPP2_MAX_THREADS; thread++) { 2764 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2765 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val); 2766 } 2767 } 2768 2769 static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz) 2770 { 2771 u64 tmp = (u64)clk_hz * usec; 2772 2773 do_div(tmp, USEC_PER_SEC); 2774 2775 return tmp > U32_MAX ? U32_MAX : tmp; 2776 } 2777 2778 static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz) 2779 { 2780 u64 tmp = (u64)cycles * USEC_PER_SEC; 2781 2782 do_div(tmp, clk_hz); 2783 2784 return tmp > U32_MAX ? U32_MAX : tmp; 2785 } 2786 2787 /* Set the time delay in usec before Rx interrupt */ 2788 static void mvpp2_rx_time_coal_set(struct mvpp2_port *port, 2789 struct mvpp2_rx_queue *rxq) 2790 { 2791 unsigned long freq = port->priv->tclk; 2792 u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2793 2794 if (val > MVPP2_MAX_ISR_RX_THRESHOLD) { 2795 rxq->time_coal = 2796 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq); 2797 2798 /* re-evaluate to get actual register value */ 2799 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2800 } 2801 2802 mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val); 2803 } 2804 2805 static void mvpp2_tx_time_coal_set(struct mvpp2_port *port) 2806 { 2807 unsigned long freq = port->priv->tclk; 2808 u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2809 2810 if (val > MVPP2_MAX_ISR_TX_THRESHOLD) { 2811 port->tx_time_coal = 2812 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq); 2813 2814 /* re-evaluate to get actual register value */ 2815 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2816 } 2817 2818 mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), val); 2819 } 2820 2821 /* Free Tx queue skbuffs */ 2822 static void mvpp2_txq_bufs_free(struct mvpp2_port *port, 2823 struct mvpp2_tx_queue *txq, 2824 struct mvpp2_txq_pcpu *txq_pcpu, int num) 2825 { 2826 struct xdp_frame_bulk bq; 2827 int i; 2828 2829 xdp_frame_bulk_init(&bq); 2830 2831 rcu_read_lock(); /* need for xdp_return_frame_bulk */ 2832 2833 for (i = 0; i < num; i++) { 2834 struct mvpp2_txq_pcpu_buf *tx_buf = 2835 txq_pcpu->buffs + txq_pcpu->txq_get_index; 2836 2837 if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma) && 2838 tx_buf->type != MVPP2_TYPE_XDP_TX) 2839 dma_unmap_single(port->dev->dev.parent, tx_buf->dma, 2840 tx_buf->size, DMA_TO_DEVICE); 2841 if (tx_buf->type == MVPP2_TYPE_SKB && tx_buf->skb) 2842 dev_kfree_skb_any(tx_buf->skb); 2843 else if (tx_buf->type == MVPP2_TYPE_XDP_TX || 2844 tx_buf->type == MVPP2_TYPE_XDP_NDO) 2845 xdp_return_frame_bulk(tx_buf->xdpf, &bq); 2846 2847 mvpp2_txq_inc_get(txq_pcpu); 2848 } 2849 xdp_flush_frame_bulk(&bq); 2850 2851 rcu_read_unlock(); 2852 } 2853 2854 static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port, 2855 u32 cause) 2856 { 2857 int queue = fls(cause) - 1; 2858 2859 return port->rxqs[queue]; 2860 } 2861 2862 static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port, 2863 u32 cause) 2864 { 2865 int queue = fls(cause) - 1; 2866 2867 return port->txqs[queue]; 2868 } 2869 2870 /* Handle end of transmission */ 2871 static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 2872 struct mvpp2_txq_pcpu *txq_pcpu) 2873 { 2874 struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id); 2875 int tx_done; 2876 2877 if (txq_pcpu->thread != mvpp2_cpu_to_thread(port->priv, smp_processor_id())) 2878 netdev_err(port->dev, "wrong cpu on the end of Tx processing\n"); 2879 2880 tx_done = mvpp2_txq_sent_desc_proc(port, txq); 2881 if (!tx_done) 2882 return; 2883 mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done); 2884 2885 txq_pcpu->count -= tx_done; 2886 2887 if (netif_tx_queue_stopped(nq)) 2888 if (txq_pcpu->count <= txq_pcpu->wake_threshold) 2889 netif_tx_wake_queue(nq); 2890 } 2891 2892 static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause, 2893 unsigned int thread) 2894 { 2895 struct mvpp2_tx_queue *txq; 2896 struct mvpp2_txq_pcpu *txq_pcpu; 2897 unsigned int tx_todo = 0; 2898 2899 while (cause) { 2900 txq = mvpp2_get_tx_queue(port, cause); 2901 if (!txq) 2902 break; 2903 2904 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2905 2906 if (txq_pcpu->count) { 2907 mvpp2_txq_done(port, txq, txq_pcpu); 2908 tx_todo += txq_pcpu->count; 2909 } 2910 2911 cause &= ~(1 << txq->log_id); 2912 } 2913 return tx_todo; 2914 } 2915 2916 /* Rx/Tx queue initialization/cleanup methods */ 2917 2918 /* Allocate and initialize descriptors for aggr TXQ */ 2919 static int mvpp2_aggr_txq_init(struct platform_device *pdev, 2920 struct mvpp2_tx_queue *aggr_txq, 2921 unsigned int thread, struct mvpp2 *priv) 2922 { 2923 u32 txq_dma; 2924 2925 /* Allocate memory for TX descriptors */ 2926 aggr_txq->descs = dma_alloc_coherent(&pdev->dev, 2927 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 2928 &aggr_txq->descs_dma, GFP_KERNEL); 2929 if (!aggr_txq->descs) 2930 return -ENOMEM; 2931 2932 aggr_txq->last_desc = MVPP2_AGGR_TXQ_SIZE - 1; 2933 2934 /* Aggr TXQ no reset WA */ 2935 aggr_txq->next_desc_to_proc = mvpp2_read(priv, 2936 MVPP2_AGGR_TXQ_INDEX_REG(thread)); 2937 2938 /* Set Tx descriptors queue starting address indirect 2939 * access 2940 */ 2941 if (priv->hw_version == MVPP21) 2942 txq_dma = aggr_txq->descs_dma; 2943 else 2944 txq_dma = aggr_txq->descs_dma >> 2945 MVPP22_AGGR_TXQ_DESC_ADDR_OFFS; 2946 2947 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(thread), txq_dma); 2948 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(thread), 2949 MVPP2_AGGR_TXQ_SIZE); 2950 2951 return 0; 2952 } 2953 2954 /* Create a specified Rx queue */ 2955 static int mvpp2_rxq_init(struct mvpp2_port *port, 2956 struct mvpp2_rx_queue *rxq) 2957 { 2958 struct mvpp2 *priv = port->priv; 2959 unsigned int thread; 2960 u32 rxq_dma; 2961 int err; 2962 2963 rxq->size = port->rx_ring_size; 2964 2965 /* Allocate memory for RX descriptors */ 2966 rxq->descs = dma_alloc_coherent(port->dev->dev.parent, 2967 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2968 &rxq->descs_dma, GFP_KERNEL); 2969 if (!rxq->descs) 2970 return -ENOMEM; 2971 2972 rxq->last_desc = rxq->size - 1; 2973 2974 /* Zero occupied and non-occupied counters - direct access */ 2975 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2976 2977 /* Set Rx descriptors queue starting address - indirect access */ 2978 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2979 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2980 if (port->priv->hw_version == MVPP21) 2981 rxq_dma = rxq->descs_dma; 2982 else 2983 rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS; 2984 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma); 2985 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, rxq->size); 2986 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_INDEX_REG, 0); 2987 put_cpu(); 2988 2989 /* Set Offset */ 2990 mvpp2_rxq_offset_set(port, rxq->id, MVPP2_SKB_HEADROOM); 2991 2992 /* Set coalescing pkts and time */ 2993 mvpp2_rx_pkts_coal_set(port, rxq); 2994 mvpp2_rx_time_coal_set(port, rxq); 2995 2996 /* Set the number of non occupied descriptors threshold */ 2997 mvpp2_set_rxq_free_tresh(port, rxq); 2998 2999 /* Add number of descriptors ready for receiving packets */ 3000 mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size); 3001 3002 if (priv->percpu_pools) { 3003 err = xdp_rxq_info_reg(&rxq->xdp_rxq_short, port->dev, rxq->logic_rxq, 0); 3004 if (err < 0) 3005 goto err_free_dma; 3006 3007 err = xdp_rxq_info_reg(&rxq->xdp_rxq_long, port->dev, rxq->logic_rxq, 0); 3008 if (err < 0) 3009 goto err_unregister_rxq_short; 3010 3011 /* Every RXQ has a pool for short and another for long packets */ 3012 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_short, 3013 MEM_TYPE_PAGE_POOL, 3014 priv->page_pool[rxq->logic_rxq]); 3015 if (err < 0) 3016 goto err_unregister_rxq_long; 3017 3018 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_long, 3019 MEM_TYPE_PAGE_POOL, 3020 priv->page_pool[rxq->logic_rxq + 3021 port->nrxqs]); 3022 if (err < 0) 3023 goto err_unregister_mem_rxq_short; 3024 } 3025 3026 return 0; 3027 3028 err_unregister_mem_rxq_short: 3029 xdp_rxq_info_unreg_mem_model(&rxq->xdp_rxq_short); 3030 err_unregister_rxq_long: 3031 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 3032 err_unregister_rxq_short: 3033 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 3034 err_free_dma: 3035 dma_free_coherent(port->dev->dev.parent, 3036 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 3037 rxq->descs, rxq->descs_dma); 3038 return err; 3039 } 3040 3041 /* Push packets received by the RXQ to BM pool */ 3042 static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port, 3043 struct mvpp2_rx_queue *rxq) 3044 { 3045 int rx_received, i; 3046 3047 rx_received = mvpp2_rxq_received(port, rxq->id); 3048 if (!rx_received) 3049 return; 3050 3051 for (i = 0; i < rx_received; i++) { 3052 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 3053 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 3054 int pool; 3055 3056 pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >> 3057 MVPP2_RXD_BM_POOL_ID_OFFS; 3058 3059 mvpp2_bm_pool_put(port, pool, 3060 mvpp2_rxdesc_dma_addr_get(port, rx_desc), 3061 mvpp2_rxdesc_cookie_get(port, rx_desc)); 3062 } 3063 mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received); 3064 } 3065 3066 /* Cleanup Rx queue */ 3067 static void mvpp2_rxq_deinit(struct mvpp2_port *port, 3068 struct mvpp2_rx_queue *rxq) 3069 { 3070 unsigned int thread; 3071 3072 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_short)) 3073 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 3074 3075 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_long)) 3076 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 3077 3078 mvpp2_rxq_drop_pkts(port, rxq); 3079 3080 if (rxq->descs) 3081 dma_free_coherent(port->dev->dev.parent, 3082 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 3083 rxq->descs, 3084 rxq->descs_dma); 3085 3086 rxq->descs = NULL; 3087 rxq->last_desc = 0; 3088 rxq->next_desc_to_proc = 0; 3089 rxq->descs_dma = 0; 3090 3091 /* Clear Rx descriptors queue starting address and size; 3092 * free descriptor number 3093 */ 3094 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 3095 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3096 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 3097 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, 0); 3098 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, 0); 3099 put_cpu(); 3100 } 3101 3102 /* Create and initialize a Tx queue */ 3103 static int mvpp2_txq_init(struct mvpp2_port *port, 3104 struct mvpp2_tx_queue *txq) 3105 { 3106 u32 val; 3107 unsigned int thread; 3108 int desc, desc_per_txq, tx_port_num; 3109 struct mvpp2_txq_pcpu *txq_pcpu; 3110 3111 txq->size = port->tx_ring_size; 3112 3113 /* Allocate memory for Tx descriptors */ 3114 txq->descs = dma_alloc_coherent(port->dev->dev.parent, 3115 txq->size * MVPP2_DESC_ALIGNED_SIZE, 3116 &txq->descs_dma, GFP_KERNEL); 3117 if (!txq->descs) 3118 return -ENOMEM; 3119 3120 txq->last_desc = txq->size - 1; 3121 3122 /* Set Tx descriptors queue starting address - indirect access */ 3123 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3124 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3125 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 3126 txq->descs_dma); 3127 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 3128 txq->size & MVPP2_TXQ_DESC_SIZE_MASK); 3129 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_INDEX_REG, 0); 3130 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_RSVD_CLR_REG, 3131 txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET); 3132 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PENDING_REG); 3133 val &= ~MVPP2_TXQ_PENDING_MASK; 3134 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PENDING_REG, val); 3135 3136 /* Calculate base address in prefetch buffer. We reserve 16 descriptors 3137 * for each existing TXQ. 3138 * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT 3139 * GBE ports assumed to be continuous from 0 to MVPP2_MAX_PORTS 3140 */ 3141 desc_per_txq = 16; 3142 desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) + 3143 (txq->log_id * desc_per_txq); 3144 3145 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, 3146 MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 | 3147 MVPP2_PREF_BUF_THRESH(desc_per_txq / 2)); 3148 put_cpu(); 3149 3150 /* WRR / EJP configuration - indirect access */ 3151 tx_port_num = mvpp2_egress_port(port); 3152 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 3153 3154 val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id)); 3155 val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK; 3156 val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1); 3157 val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK; 3158 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val); 3159 3160 val = MVPP2_TXQ_TOKEN_SIZE_MAX; 3161 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id), 3162 val); 3163 3164 for (thread = 0; thread < port->priv->nthreads; thread++) { 3165 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3166 txq_pcpu->size = txq->size; 3167 txq_pcpu->buffs = kmalloc_array(txq_pcpu->size, 3168 sizeof(*txq_pcpu->buffs), 3169 GFP_KERNEL); 3170 if (!txq_pcpu->buffs) 3171 return -ENOMEM; 3172 3173 txq_pcpu->count = 0; 3174 txq_pcpu->reserved_num = 0; 3175 txq_pcpu->txq_put_index = 0; 3176 txq_pcpu->txq_get_index = 0; 3177 txq_pcpu->tso_headers = NULL; 3178 3179 txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS; 3180 txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2; 3181 3182 txq_pcpu->tso_headers = 3183 dma_alloc_coherent(port->dev->dev.parent, 3184 txq_pcpu->size * TSO_HEADER_SIZE, 3185 &txq_pcpu->tso_headers_dma, 3186 GFP_KERNEL); 3187 if (!txq_pcpu->tso_headers) 3188 return -ENOMEM; 3189 } 3190 3191 return 0; 3192 } 3193 3194 /* Free allocated TXQ resources */ 3195 static void mvpp2_txq_deinit(struct mvpp2_port *port, 3196 struct mvpp2_tx_queue *txq) 3197 { 3198 struct mvpp2_txq_pcpu *txq_pcpu; 3199 unsigned int thread; 3200 3201 for (thread = 0; thread < port->priv->nthreads; thread++) { 3202 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3203 kfree(txq_pcpu->buffs); 3204 3205 if (txq_pcpu->tso_headers) 3206 dma_free_coherent(port->dev->dev.parent, 3207 txq_pcpu->size * TSO_HEADER_SIZE, 3208 txq_pcpu->tso_headers, 3209 txq_pcpu->tso_headers_dma); 3210 3211 txq_pcpu->tso_headers = NULL; 3212 } 3213 3214 if (txq->descs) 3215 dma_free_coherent(port->dev->dev.parent, 3216 txq->size * MVPP2_DESC_ALIGNED_SIZE, 3217 txq->descs, txq->descs_dma); 3218 3219 txq->descs = NULL; 3220 txq->last_desc = 0; 3221 txq->next_desc_to_proc = 0; 3222 txq->descs_dma = 0; 3223 3224 /* Set minimum bandwidth for disabled TXQs */ 3225 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->log_id), 0); 3226 3227 /* Set Tx descriptors queue starting address and size */ 3228 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3229 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3230 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 0); 3231 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 0); 3232 put_cpu(); 3233 } 3234 3235 /* Cleanup Tx ports */ 3236 static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq) 3237 { 3238 struct mvpp2_txq_pcpu *txq_pcpu; 3239 int delay, pending; 3240 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 3241 u32 val; 3242 3243 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 3244 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG); 3245 val |= MVPP2_TXQ_DRAIN_EN_MASK; 3246 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 3247 3248 /* The napi queue has been stopped so wait for all packets 3249 * to be transmitted. 3250 */ 3251 delay = 0; 3252 do { 3253 if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) { 3254 netdev_warn(port->dev, 3255 "port %d: cleaning queue %d timed out\n", 3256 port->id, txq->log_id); 3257 break; 3258 } 3259 mdelay(1); 3260 delay++; 3261 3262 pending = mvpp2_thread_read(port->priv, thread, 3263 MVPP2_TXQ_PENDING_REG); 3264 pending &= MVPP2_TXQ_PENDING_MASK; 3265 } while (pending); 3266 3267 val &= ~MVPP2_TXQ_DRAIN_EN_MASK; 3268 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 3269 put_cpu(); 3270 3271 for (thread = 0; thread < port->priv->nthreads; thread++) { 3272 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3273 3274 /* Release all packets */ 3275 mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count); 3276 3277 /* Reset queue */ 3278 txq_pcpu->count = 0; 3279 txq_pcpu->txq_put_index = 0; 3280 txq_pcpu->txq_get_index = 0; 3281 } 3282 } 3283 3284 /* Cleanup all Tx queues */ 3285 static void mvpp2_cleanup_txqs(struct mvpp2_port *port) 3286 { 3287 struct mvpp2_tx_queue *txq; 3288 int queue; 3289 u32 val; 3290 3291 val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG); 3292 3293 /* Reset Tx ports and delete Tx queues */ 3294 val |= MVPP2_TX_PORT_FLUSH_MASK(port->id); 3295 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 3296 3297 for (queue = 0; queue < port->ntxqs; queue++) { 3298 txq = port->txqs[queue]; 3299 mvpp2_txq_clean(port, txq); 3300 mvpp2_txq_deinit(port, txq); 3301 } 3302 3303 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 3304 3305 val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id); 3306 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 3307 } 3308 3309 /* Cleanup all Rx queues */ 3310 static void mvpp2_cleanup_rxqs(struct mvpp2_port *port) 3311 { 3312 int queue; 3313 3314 for (queue = 0; queue < port->nrxqs; queue++) 3315 mvpp2_rxq_deinit(port, port->rxqs[queue]); 3316 3317 if (port->tx_fc) 3318 mvpp2_rxq_disable_fc(port); 3319 } 3320 3321 /* Init all Rx queues for port */ 3322 static int mvpp2_setup_rxqs(struct mvpp2_port *port) 3323 { 3324 int queue, err; 3325 3326 for (queue = 0; queue < port->nrxqs; queue++) { 3327 err = mvpp2_rxq_init(port, port->rxqs[queue]); 3328 if (err) 3329 goto err_cleanup; 3330 } 3331 3332 if (port->tx_fc) 3333 mvpp2_rxq_enable_fc(port); 3334 3335 return 0; 3336 3337 err_cleanup: 3338 mvpp2_cleanup_rxqs(port); 3339 return err; 3340 } 3341 3342 /* Init all tx queues for port */ 3343 static int mvpp2_setup_txqs(struct mvpp2_port *port) 3344 { 3345 struct mvpp2_tx_queue *txq; 3346 int queue, err; 3347 3348 for (queue = 0; queue < port->ntxqs; queue++) { 3349 txq = port->txqs[queue]; 3350 err = mvpp2_txq_init(port, txq); 3351 if (err) 3352 goto err_cleanup; 3353 3354 /* Assign this queue to a CPU */ 3355 if (queue < num_possible_cpus()) 3356 netif_set_xps_queue(port->dev, cpumask_of(queue), queue); 3357 } 3358 3359 if (port->has_tx_irqs) { 3360 mvpp2_tx_time_coal_set(port); 3361 for (queue = 0; queue < port->ntxqs; queue++) { 3362 txq = port->txqs[queue]; 3363 mvpp2_tx_pkts_coal_set(port, txq); 3364 } 3365 } 3366 3367 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 3368 return 0; 3369 3370 err_cleanup: 3371 mvpp2_cleanup_txqs(port); 3372 return err; 3373 } 3374 3375 /* The callback for per-port interrupt */ 3376 static irqreturn_t mvpp2_isr(int irq, void *dev_id) 3377 { 3378 struct mvpp2_queue_vector *qv = dev_id; 3379 3380 mvpp2_qvec_interrupt_disable(qv); 3381 3382 napi_schedule(&qv->napi); 3383 3384 return IRQ_HANDLED; 3385 } 3386 3387 static void mvpp2_isr_handle_ptp_queue(struct mvpp2_port *port, int nq) 3388 { 3389 struct skb_shared_hwtstamps shhwtstamps; 3390 struct mvpp2_hwtstamp_queue *queue; 3391 struct sk_buff *skb; 3392 void __iomem *ptp_q; 3393 unsigned int id; 3394 u32 r0, r1, r2; 3395 3396 ptp_q = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 3397 if (nq) 3398 ptp_q += MVPP22_PTP_TX_Q1_R0 - MVPP22_PTP_TX_Q0_R0; 3399 3400 queue = &port->tx_hwtstamp_queue[nq]; 3401 3402 while (1) { 3403 r0 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R0) & 0xffff; 3404 if (!r0) 3405 break; 3406 3407 r1 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R1) & 0xffff; 3408 r2 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R2) & 0xffff; 3409 3410 id = (r0 >> 1) & 31; 3411 3412 skb = queue->skb[id]; 3413 queue->skb[id] = NULL; 3414 if (skb) { 3415 u32 ts = r2 << 19 | r1 << 3 | r0 >> 13; 3416 3417 mvpp22_tai_tstamp(port->priv->tai, ts, &shhwtstamps); 3418 skb_tstamp_tx(skb, &shhwtstamps); 3419 dev_kfree_skb_any(skb); 3420 } 3421 } 3422 } 3423 3424 static void mvpp2_isr_handle_ptp(struct mvpp2_port *port) 3425 { 3426 void __iomem *ptp; 3427 u32 val; 3428 3429 ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 3430 val = readl(ptp + MVPP22_PTP_INT_CAUSE); 3431 if (val & MVPP22_PTP_INT_CAUSE_QUEUE0) 3432 mvpp2_isr_handle_ptp_queue(port, 0); 3433 if (val & MVPP22_PTP_INT_CAUSE_QUEUE1) 3434 mvpp2_isr_handle_ptp_queue(port, 1); 3435 } 3436 3437 static void mvpp2_isr_handle_link(struct mvpp2_port *port, 3438 struct phylink_pcs *pcs, bool link) 3439 { 3440 struct net_device *dev = port->dev; 3441 3442 if (port->phylink) { 3443 phylink_pcs_change(pcs, link); 3444 return; 3445 } 3446 3447 if (!netif_running(dev)) 3448 return; 3449 3450 if (link) { 3451 mvpp2_interrupts_enable(port); 3452 3453 mvpp2_egress_enable(port); 3454 mvpp2_ingress_enable(port); 3455 netif_carrier_on(dev); 3456 netif_tx_wake_all_queues(dev); 3457 } else { 3458 netif_tx_stop_all_queues(dev); 3459 netif_carrier_off(dev); 3460 mvpp2_ingress_disable(port); 3461 mvpp2_egress_disable(port); 3462 3463 mvpp2_interrupts_disable(port); 3464 } 3465 } 3466 3467 static void mvpp2_isr_handle_xlg(struct mvpp2_port *port) 3468 { 3469 bool link; 3470 u32 val; 3471 3472 val = readl(port->base + MVPP22_XLG_INT_STAT); 3473 if (val & MVPP22_XLG_INT_STAT_LINK) { 3474 val = readl(port->base + MVPP22_XLG_STATUS); 3475 link = (val & MVPP22_XLG_STATUS_LINK_UP); 3476 mvpp2_isr_handle_link(port, &port->pcs_xlg, link); 3477 } 3478 } 3479 3480 static void mvpp2_isr_handle_gmac_internal(struct mvpp2_port *port) 3481 { 3482 bool link; 3483 u32 val; 3484 3485 if (phy_interface_mode_is_rgmii(port->phy_interface) || 3486 phy_interface_mode_is_8023z(port->phy_interface) || 3487 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 3488 val = readl(port->base + MVPP22_GMAC_INT_STAT); 3489 if (val & MVPP22_GMAC_INT_STAT_LINK) { 3490 val = readl(port->base + MVPP2_GMAC_STATUS0); 3491 link = (val & MVPP2_GMAC_STATUS0_LINK_UP); 3492 mvpp2_isr_handle_link(port, &port->pcs_gmac, link); 3493 } 3494 } 3495 } 3496 3497 /* Per-port interrupt for link status changes */ 3498 static irqreturn_t mvpp2_port_isr(int irq, void *dev_id) 3499 { 3500 struct mvpp2_port *port = (struct mvpp2_port *)dev_id; 3501 u32 val; 3502 3503 mvpp22_gop_mask_irq(port); 3504 3505 if (mvpp2_port_supports_xlg(port) && 3506 mvpp2_is_xlg(port->phy_interface)) { 3507 /* Check the external status register */ 3508 val = readl(port->base + MVPP22_XLG_EXT_INT_STAT); 3509 if (val & MVPP22_XLG_EXT_INT_STAT_XLG) 3510 mvpp2_isr_handle_xlg(port); 3511 if (val & MVPP22_XLG_EXT_INT_STAT_PTP) 3512 mvpp2_isr_handle_ptp(port); 3513 } else { 3514 /* If it's not the XLG, we must be using the GMAC. 3515 * Check the summary status. 3516 */ 3517 val = readl(port->base + MVPP22_GMAC_INT_SUM_STAT); 3518 if (val & MVPP22_GMAC_INT_SUM_STAT_INTERNAL) 3519 mvpp2_isr_handle_gmac_internal(port); 3520 if (val & MVPP22_GMAC_INT_SUM_STAT_PTP) 3521 mvpp2_isr_handle_ptp(port); 3522 } 3523 3524 mvpp22_gop_unmask_irq(port); 3525 return IRQ_HANDLED; 3526 } 3527 3528 static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer) 3529 { 3530 struct net_device *dev; 3531 struct mvpp2_port *port; 3532 struct mvpp2_port_pcpu *port_pcpu; 3533 unsigned int tx_todo, cause; 3534 3535 port_pcpu = container_of(timer, struct mvpp2_port_pcpu, tx_done_timer); 3536 dev = port_pcpu->dev; 3537 3538 if (!netif_running(dev)) 3539 return HRTIMER_NORESTART; 3540 3541 port_pcpu->timer_scheduled = false; 3542 port = netdev_priv(dev); 3543 3544 /* Process all the Tx queues */ 3545 cause = (1 << port->ntxqs) - 1; 3546 tx_todo = mvpp2_tx_done(port, cause, 3547 mvpp2_cpu_to_thread(port->priv, smp_processor_id())); 3548 3549 /* Set the timer in case not all the packets were processed */ 3550 if (tx_todo && !port_pcpu->timer_scheduled) { 3551 port_pcpu->timer_scheduled = true; 3552 hrtimer_forward_now(&port_pcpu->tx_done_timer, 3553 MVPP2_TXDONE_HRTIMER_PERIOD_NS); 3554 3555 return HRTIMER_RESTART; 3556 } 3557 return HRTIMER_NORESTART; 3558 } 3559 3560 /* Main RX/TX processing routines */ 3561 3562 /* Display more error info */ 3563 static void mvpp2_rx_error(struct mvpp2_port *port, 3564 struct mvpp2_rx_desc *rx_desc) 3565 { 3566 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 3567 size_t sz = mvpp2_rxdesc_size_get(port, rx_desc); 3568 char *err_str = NULL; 3569 3570 switch (status & MVPP2_RXD_ERR_CODE_MASK) { 3571 case MVPP2_RXD_ERR_CRC: 3572 err_str = "crc"; 3573 break; 3574 case MVPP2_RXD_ERR_OVERRUN: 3575 err_str = "overrun"; 3576 break; 3577 case MVPP2_RXD_ERR_RESOURCE: 3578 err_str = "resource"; 3579 break; 3580 } 3581 if (err_str && net_ratelimit()) 3582 netdev_err(port->dev, 3583 "bad rx status %08x (%s error), size=%zu\n", 3584 status, err_str, sz); 3585 } 3586 3587 /* Handle RX checksum offload */ 3588 static int mvpp2_rx_csum(struct mvpp2_port *port, u32 status) 3589 { 3590 if (((status & MVPP2_RXD_L3_IP4) && 3591 !(status & MVPP2_RXD_IP4_HEADER_ERR)) || 3592 (status & MVPP2_RXD_L3_IP6)) 3593 if (((status & MVPP2_RXD_L4_UDP) || 3594 (status & MVPP2_RXD_L4_TCP)) && 3595 (status & MVPP2_RXD_L4_CSUM_OK)) 3596 return CHECKSUM_UNNECESSARY; 3597 3598 return CHECKSUM_NONE; 3599 } 3600 3601 /* Allocate a new skb and add it to BM pool */ 3602 static int mvpp2_rx_refill(struct mvpp2_port *port, 3603 struct mvpp2_bm_pool *bm_pool, 3604 struct page_pool *page_pool, int pool) 3605 { 3606 dma_addr_t dma_addr; 3607 phys_addr_t phys_addr; 3608 void *buf; 3609 3610 buf = mvpp2_buf_alloc(port, bm_pool, page_pool, 3611 &dma_addr, &phys_addr, GFP_ATOMIC); 3612 if (!buf) 3613 return -ENOMEM; 3614 3615 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3616 3617 return 0; 3618 } 3619 3620 /* Handle tx checksum */ 3621 static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb) 3622 { 3623 if (skb->ip_summed == CHECKSUM_PARTIAL) { 3624 int ip_hdr_len = 0; 3625 u8 l4_proto; 3626 __be16 l3_proto = vlan_get_protocol(skb); 3627 3628 if (l3_proto == htons(ETH_P_IP)) { 3629 struct iphdr *ip4h = ip_hdr(skb); 3630 3631 /* Calculate IPv4 checksum and L4 checksum */ 3632 ip_hdr_len = ip4h->ihl; 3633 l4_proto = ip4h->protocol; 3634 } else if (l3_proto == htons(ETH_P_IPV6)) { 3635 struct ipv6hdr *ip6h = ipv6_hdr(skb); 3636 3637 /* Read l4_protocol from one of IPv6 extra headers */ 3638 if (skb_network_header_len(skb) > 0) 3639 ip_hdr_len = (skb_network_header_len(skb) >> 2); 3640 l4_proto = ip6h->nexthdr; 3641 } else { 3642 return MVPP2_TXD_L4_CSUM_NOT; 3643 } 3644 3645 return mvpp2_txq_desc_csum(skb_network_offset(skb), 3646 l3_proto, ip_hdr_len, l4_proto); 3647 } 3648 3649 return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE; 3650 } 3651 3652 static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit, int nxmit_byte) 3653 { 3654 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3655 struct mvpp2_tx_queue *aggr_txq; 3656 struct mvpp2_txq_pcpu *txq_pcpu; 3657 struct mvpp2_tx_queue *txq; 3658 struct netdev_queue *nq; 3659 3660 txq = port->txqs[txq_id]; 3661 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3662 nq = netdev_get_tx_queue(port->dev, txq_id); 3663 aggr_txq = &port->priv->aggr_txqs[thread]; 3664 3665 txq_pcpu->reserved_num -= nxmit; 3666 txq_pcpu->count += nxmit; 3667 aggr_txq->count += nxmit; 3668 3669 /* Enable transmit */ 3670 wmb(); 3671 mvpp2_aggr_txq_pend_desc_add(port, nxmit); 3672 3673 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 3674 netif_tx_stop_queue(nq); 3675 3676 /* Finalize TX processing */ 3677 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 3678 mvpp2_txq_done(port, txq, txq_pcpu); 3679 } 3680 3681 static int 3682 mvpp2_xdp_submit_frame(struct mvpp2_port *port, u16 txq_id, 3683 struct xdp_frame *xdpf, bool dma_map) 3684 { 3685 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3686 u32 tx_cmd = MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE | 3687 MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 3688 enum mvpp2_tx_buf_type buf_type; 3689 struct mvpp2_txq_pcpu *txq_pcpu; 3690 struct mvpp2_tx_queue *aggr_txq; 3691 struct mvpp2_tx_desc *tx_desc; 3692 struct mvpp2_tx_queue *txq; 3693 int ret = MVPP2_XDP_TX; 3694 dma_addr_t dma_addr; 3695 3696 txq = port->txqs[txq_id]; 3697 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3698 aggr_txq = &port->priv->aggr_txqs[thread]; 3699 3700 /* Check number of available descriptors */ 3701 if (mvpp2_aggr_desc_num_check(port, aggr_txq, 1) || 3702 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 1)) { 3703 ret = MVPP2_XDP_DROPPED; 3704 goto out; 3705 } 3706 3707 /* Get a descriptor for the first part of the packet */ 3708 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3709 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3710 mvpp2_txdesc_size_set(port, tx_desc, xdpf->len); 3711 3712 if (dma_map) { 3713 /* XDP_REDIRECT or AF_XDP */ 3714 dma_addr = dma_map_single(port->dev->dev.parent, xdpf->data, 3715 xdpf->len, DMA_TO_DEVICE); 3716 3717 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 3718 mvpp2_txq_desc_put(txq); 3719 ret = MVPP2_XDP_DROPPED; 3720 goto out; 3721 } 3722 3723 buf_type = MVPP2_TYPE_XDP_NDO; 3724 } else { 3725 /* XDP_TX */ 3726 struct page *page = virt_to_page(xdpf->data); 3727 3728 dma_addr = page_pool_get_dma_addr(page) + 3729 sizeof(*xdpf) + xdpf->headroom; 3730 dma_sync_single_for_device(port->dev->dev.parent, dma_addr, 3731 xdpf->len, DMA_BIDIRECTIONAL); 3732 3733 buf_type = MVPP2_TYPE_XDP_TX; 3734 } 3735 3736 mvpp2_txdesc_dma_addr_set(port, tx_desc, dma_addr); 3737 3738 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 3739 mvpp2_txq_inc_put(port, txq_pcpu, xdpf, tx_desc, buf_type); 3740 3741 out: 3742 return ret; 3743 } 3744 3745 static int 3746 mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp) 3747 { 3748 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 3749 struct xdp_frame *xdpf; 3750 u16 txq_id; 3751 int ret; 3752 3753 xdpf = xdp_convert_buff_to_frame(xdp); 3754 if (unlikely(!xdpf)) 3755 return MVPP2_XDP_DROPPED; 3756 3757 /* The first of the TX queues are used for XPS, 3758 * the second half for XDP_TX 3759 */ 3760 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3761 3762 ret = mvpp2_xdp_submit_frame(port, txq_id, xdpf, false); 3763 if (ret == MVPP2_XDP_TX) { 3764 u64_stats_update_begin(&stats->syncp); 3765 stats->tx_bytes += xdpf->len; 3766 stats->tx_packets++; 3767 stats->xdp_tx++; 3768 u64_stats_update_end(&stats->syncp); 3769 3770 mvpp2_xdp_finish_tx(port, txq_id, 1, xdpf->len); 3771 } else { 3772 u64_stats_update_begin(&stats->syncp); 3773 stats->xdp_tx_err++; 3774 u64_stats_update_end(&stats->syncp); 3775 } 3776 3777 return ret; 3778 } 3779 3780 static int 3781 mvpp2_xdp_xmit(struct net_device *dev, int num_frame, 3782 struct xdp_frame **frames, u32 flags) 3783 { 3784 struct mvpp2_port *port = netdev_priv(dev); 3785 int i, nxmit_byte = 0, nxmit = 0; 3786 struct mvpp2_pcpu_stats *stats; 3787 u16 txq_id; 3788 u32 ret; 3789 3790 if (unlikely(test_bit(0, &port->state))) 3791 return -ENETDOWN; 3792 3793 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 3794 return -EINVAL; 3795 3796 /* The first of the TX queues are used for XPS, 3797 * the second half for XDP_TX 3798 */ 3799 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3800 3801 for (i = 0; i < num_frame; i++) { 3802 ret = mvpp2_xdp_submit_frame(port, txq_id, frames[i], true); 3803 if (ret != MVPP2_XDP_TX) 3804 break; 3805 3806 nxmit_byte += frames[i]->len; 3807 nxmit++; 3808 } 3809 3810 if (likely(nxmit > 0)) 3811 mvpp2_xdp_finish_tx(port, txq_id, nxmit, nxmit_byte); 3812 3813 stats = this_cpu_ptr(port->stats); 3814 u64_stats_update_begin(&stats->syncp); 3815 stats->tx_bytes += nxmit_byte; 3816 stats->tx_packets += nxmit; 3817 stats->xdp_xmit += nxmit; 3818 stats->xdp_xmit_err += num_frame - nxmit; 3819 u64_stats_update_end(&stats->syncp); 3820 3821 return nxmit; 3822 } 3823 3824 static int 3825 mvpp2_run_xdp(struct mvpp2_port *port, struct bpf_prog *prog, 3826 struct xdp_buff *xdp, struct page_pool *pp, 3827 struct mvpp2_pcpu_stats *stats) 3828 { 3829 unsigned int len, sync, err; 3830 struct page *page; 3831 u32 ret, act; 3832 3833 len = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3834 act = bpf_prog_run_xdp(prog, xdp); 3835 3836 /* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */ 3837 sync = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3838 sync = max(sync, len); 3839 3840 switch (act) { 3841 case XDP_PASS: 3842 stats->xdp_pass++; 3843 ret = MVPP2_XDP_PASS; 3844 break; 3845 case XDP_REDIRECT: 3846 err = xdp_do_redirect(port->dev, xdp, prog); 3847 if (unlikely(err)) { 3848 ret = MVPP2_XDP_DROPPED; 3849 page = virt_to_head_page(xdp->data); 3850 page_pool_put_page(pp, page, sync, true); 3851 } else { 3852 ret = MVPP2_XDP_REDIR; 3853 stats->xdp_redirect++; 3854 } 3855 break; 3856 case XDP_TX: 3857 ret = mvpp2_xdp_xmit_back(port, xdp); 3858 if (ret != MVPP2_XDP_TX) { 3859 page = virt_to_head_page(xdp->data); 3860 page_pool_put_page(pp, page, sync, true); 3861 } 3862 break; 3863 default: 3864 bpf_warn_invalid_xdp_action(port->dev, prog, act); 3865 fallthrough; 3866 case XDP_ABORTED: 3867 trace_xdp_exception(port->dev, prog, act); 3868 fallthrough; 3869 case XDP_DROP: 3870 page = virt_to_head_page(xdp->data); 3871 page_pool_put_page(pp, page, sync, true); 3872 ret = MVPP2_XDP_DROPPED; 3873 stats->xdp_drop++; 3874 break; 3875 } 3876 3877 return ret; 3878 } 3879 3880 static void mvpp2_buff_hdr_pool_put(struct mvpp2_port *port, struct mvpp2_rx_desc *rx_desc, 3881 int pool, u32 rx_status) 3882 { 3883 phys_addr_t phys_addr, phys_addr_next; 3884 dma_addr_t dma_addr, dma_addr_next; 3885 struct mvpp2_buff_hdr *buff_hdr; 3886 3887 phys_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 3888 dma_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 3889 3890 do { 3891 buff_hdr = (struct mvpp2_buff_hdr *)phys_to_virt(phys_addr); 3892 3893 phys_addr_next = le32_to_cpu(buff_hdr->next_phys_addr); 3894 dma_addr_next = le32_to_cpu(buff_hdr->next_dma_addr); 3895 3896 if (port->priv->hw_version >= MVPP22) { 3897 phys_addr_next |= ((u64)buff_hdr->next_phys_addr_high << 32); 3898 dma_addr_next |= ((u64)buff_hdr->next_dma_addr_high << 32); 3899 } 3900 3901 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3902 3903 phys_addr = phys_addr_next; 3904 dma_addr = dma_addr_next; 3905 3906 } while (!MVPP2_B_HDR_INFO_IS_LAST(le16_to_cpu(buff_hdr->info))); 3907 } 3908 3909 /* Main rx processing */ 3910 static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi, 3911 int rx_todo, struct mvpp2_rx_queue *rxq) 3912 { 3913 struct net_device *dev = port->dev; 3914 struct mvpp2_pcpu_stats ps = {}; 3915 enum dma_data_direction dma_dir; 3916 struct bpf_prog *xdp_prog; 3917 struct xdp_buff xdp; 3918 int rx_received; 3919 int rx_done = 0; 3920 u32 xdp_ret = 0; 3921 3922 xdp_prog = READ_ONCE(port->xdp_prog); 3923 3924 /* Get number of received packets and clamp the to-do */ 3925 rx_received = mvpp2_rxq_received(port, rxq->id); 3926 if (rx_todo > rx_received) 3927 rx_todo = rx_received; 3928 3929 while (rx_done < rx_todo) { 3930 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 3931 struct mvpp2_bm_pool *bm_pool; 3932 struct page_pool *pp = NULL; 3933 struct sk_buff *skb; 3934 unsigned int frag_size; 3935 dma_addr_t dma_addr; 3936 phys_addr_t phys_addr; 3937 u32 rx_status, timestamp; 3938 int pool, rx_bytes, err, ret; 3939 struct page *page; 3940 void *data; 3941 3942 phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 3943 data = (void *)phys_to_virt(phys_addr); 3944 page = virt_to_page(data); 3945 prefetch(page); 3946 3947 rx_done++; 3948 rx_status = mvpp2_rxdesc_status_get(port, rx_desc); 3949 rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc); 3950 rx_bytes -= MVPP2_MH_SIZE; 3951 dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 3952 3953 pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >> 3954 MVPP2_RXD_BM_POOL_ID_OFFS; 3955 bm_pool = &port->priv->bm_pools[pool]; 3956 3957 if (port->priv->percpu_pools) { 3958 pp = port->priv->page_pool[pool]; 3959 dma_dir = page_pool_get_dma_dir(pp); 3960 } else { 3961 dma_dir = DMA_FROM_DEVICE; 3962 } 3963 3964 dma_sync_single_for_cpu(dev->dev.parent, dma_addr, 3965 rx_bytes + MVPP2_MH_SIZE, 3966 dma_dir); 3967 3968 /* Buffer header not supported */ 3969 if (rx_status & MVPP2_RXD_BUF_HDR) 3970 goto err_drop_frame; 3971 3972 /* In case of an error, release the requested buffer pointer 3973 * to the Buffer Manager. This request process is controlled 3974 * by the hardware, and the information about the buffer is 3975 * comprised by the RX descriptor. 3976 */ 3977 if (rx_status & MVPP2_RXD_ERR_SUMMARY) 3978 goto err_drop_frame; 3979 3980 /* Prefetch header */ 3981 prefetch(data + MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM); 3982 3983 if (bm_pool->frag_size > PAGE_SIZE) 3984 frag_size = 0; 3985 else 3986 frag_size = bm_pool->frag_size; 3987 3988 if (xdp_prog) { 3989 struct xdp_rxq_info *xdp_rxq; 3990 3991 if (bm_pool->pkt_size == MVPP2_BM_SHORT_PKT_SIZE) 3992 xdp_rxq = &rxq->xdp_rxq_short; 3993 else 3994 xdp_rxq = &rxq->xdp_rxq_long; 3995 3996 xdp_init_buff(&xdp, PAGE_SIZE, xdp_rxq); 3997 xdp_prepare_buff(&xdp, data, 3998 MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM, 3999 rx_bytes, false); 4000 4001 ret = mvpp2_run_xdp(port, xdp_prog, &xdp, pp, &ps); 4002 4003 if (ret) { 4004 xdp_ret |= ret; 4005 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 4006 if (err) { 4007 netdev_err(port->dev, "failed to refill BM pools\n"); 4008 goto err_drop_frame; 4009 } 4010 4011 ps.rx_packets++; 4012 ps.rx_bytes += rx_bytes; 4013 continue; 4014 } 4015 } 4016 4017 if (frag_size) 4018 skb = build_skb(data, frag_size); 4019 else 4020 skb = slab_build_skb(data); 4021 if (!skb) { 4022 netdev_warn(port->dev, "skb build failed\n"); 4023 goto err_drop_frame; 4024 } 4025 4026 /* If we have RX hardware timestamping enabled, grab the 4027 * timestamp from the queue and convert. 4028 */ 4029 if (mvpp22_rx_hwtstamping(port)) { 4030 timestamp = le32_to_cpu(rx_desc->pp22.timestamp); 4031 mvpp22_tai_tstamp(port->priv->tai, timestamp, 4032 skb_hwtstamps(skb)); 4033 } 4034 4035 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 4036 if (err) { 4037 netdev_err(port->dev, "failed to refill BM pools\n"); 4038 dev_kfree_skb_any(skb); 4039 goto err_drop_frame; 4040 } 4041 4042 if (pp) 4043 skb_mark_for_recycle(skb); 4044 else 4045 dma_unmap_single_attrs(dev->dev.parent, dma_addr, 4046 bm_pool->buf_size, DMA_FROM_DEVICE, 4047 DMA_ATTR_SKIP_CPU_SYNC); 4048 4049 ps.rx_packets++; 4050 ps.rx_bytes += rx_bytes; 4051 4052 skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM); 4053 skb_put(skb, rx_bytes); 4054 skb->ip_summed = mvpp2_rx_csum(port, rx_status); 4055 skb->protocol = eth_type_trans(skb, dev); 4056 4057 napi_gro_receive(napi, skb); 4058 continue; 4059 4060 err_drop_frame: 4061 dev->stats.rx_errors++; 4062 mvpp2_rx_error(port, rx_desc); 4063 /* Return the buffer to the pool */ 4064 if (rx_status & MVPP2_RXD_BUF_HDR) 4065 mvpp2_buff_hdr_pool_put(port, rx_desc, pool, rx_status); 4066 else 4067 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 4068 } 4069 4070 if (xdp_ret & MVPP2_XDP_REDIR) 4071 xdp_do_flush(); 4072 4073 if (ps.rx_packets) { 4074 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 4075 4076 u64_stats_update_begin(&stats->syncp); 4077 stats->rx_packets += ps.rx_packets; 4078 stats->rx_bytes += ps.rx_bytes; 4079 /* xdp */ 4080 stats->xdp_redirect += ps.xdp_redirect; 4081 stats->xdp_pass += ps.xdp_pass; 4082 stats->xdp_drop += ps.xdp_drop; 4083 u64_stats_update_end(&stats->syncp); 4084 } 4085 4086 /* Update Rx queue management counters */ 4087 wmb(); 4088 mvpp2_rxq_status_update(port, rxq->id, rx_done, rx_done); 4089 4090 return rx_todo; 4091 } 4092 4093 static inline void 4094 tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 4095 struct mvpp2_tx_desc *desc) 4096 { 4097 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4098 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4099 4100 dma_addr_t buf_dma_addr = 4101 mvpp2_txdesc_dma_addr_get(port, desc); 4102 size_t buf_sz = 4103 mvpp2_txdesc_size_get(port, desc); 4104 if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr)) 4105 dma_unmap_single(port->dev->dev.parent, buf_dma_addr, 4106 buf_sz, DMA_TO_DEVICE); 4107 mvpp2_txq_desc_put(txq); 4108 } 4109 4110 static void mvpp2_txdesc_clear_ptp(struct mvpp2_port *port, 4111 struct mvpp2_tx_desc *desc) 4112 { 4113 /* We only need to clear the low bits */ 4114 if (port->priv->hw_version >= MVPP22) 4115 desc->pp22.ptp_descriptor &= 4116 cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW); 4117 } 4118 4119 static bool mvpp2_tx_hw_tstamp(struct mvpp2_port *port, 4120 struct mvpp2_tx_desc *tx_desc, 4121 struct sk_buff *skb) 4122 { 4123 struct mvpp2_hwtstamp_queue *queue; 4124 unsigned int mtype, type, i; 4125 struct ptp_header *hdr; 4126 u64 ptpdesc; 4127 4128 if (port->priv->hw_version == MVPP21 || 4129 port->tx_hwtstamp_type == HWTSTAMP_TX_OFF) 4130 return false; 4131 4132 type = ptp_classify_raw(skb); 4133 if (!type) 4134 return false; 4135 4136 hdr = ptp_parse_header(skb, type); 4137 if (!hdr) 4138 return false; 4139 4140 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 4141 4142 ptpdesc = MVPP22_PTP_MACTIMESTAMPINGEN | 4143 MVPP22_PTP_ACTION_CAPTURE; 4144 queue = &port->tx_hwtstamp_queue[0]; 4145 4146 switch (type & PTP_CLASS_VMASK) { 4147 case PTP_CLASS_V1: 4148 ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV1); 4149 break; 4150 4151 case PTP_CLASS_V2: 4152 ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV2); 4153 mtype = hdr->tsmt & 15; 4154 /* Direct PTP Sync messages to queue 1 */ 4155 if (mtype == 0) { 4156 ptpdesc |= MVPP22_PTP_TIMESTAMPQUEUESELECT; 4157 queue = &port->tx_hwtstamp_queue[1]; 4158 } 4159 break; 4160 } 4161 4162 /* Take a reference on the skb and insert into our queue */ 4163 i = queue->next; 4164 queue->next = (i + 1) & 31; 4165 if (queue->skb[i]) 4166 dev_kfree_skb_any(queue->skb[i]); 4167 queue->skb[i] = skb_get(skb); 4168 4169 ptpdesc |= MVPP22_PTP_TIMESTAMPENTRYID(i); 4170 4171 /* 4172 * 3:0 - PTPAction 4173 * 6:4 - PTPPacketFormat 4174 * 7 - PTP_CF_WraparoundCheckEn 4175 * 9:8 - IngressTimestampSeconds[1:0] 4176 * 10 - Reserved 4177 * 11 - MACTimestampingEn 4178 * 17:12 - PTP_TimestampQueueEntryID[5:0] 4179 * 18 - PTPTimestampQueueSelect 4180 * 19 - UDPChecksumUpdateEn 4181 * 27:20 - TimestampOffset 4182 * PTP, NTPTransmit, OWAMP/TWAMP - L3 to PTP header 4183 * NTPTs, Y.1731 - L3 to timestamp entry 4184 * 35:28 - UDP Checksum Offset 4185 * 4186 * stored in tx descriptor bits 75:64 (11:0) and 191:168 (35:12) 4187 */ 4188 tx_desc->pp22.ptp_descriptor &= 4189 cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW); 4190 tx_desc->pp22.ptp_descriptor |= 4191 cpu_to_le32(ptpdesc & MVPP22_PTP_DESC_MASK_LOW); 4192 tx_desc->pp22.buf_dma_addr_ptp &= cpu_to_le64(~0xffffff0000000000ULL); 4193 tx_desc->pp22.buf_dma_addr_ptp |= cpu_to_le64((ptpdesc >> 12) << 40); 4194 4195 return true; 4196 } 4197 4198 /* Handle tx fragmentation processing */ 4199 static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb, 4200 struct mvpp2_tx_queue *aggr_txq, 4201 struct mvpp2_tx_queue *txq) 4202 { 4203 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4204 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4205 struct mvpp2_tx_desc *tx_desc; 4206 int i; 4207 dma_addr_t buf_dma_addr; 4208 4209 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 4210 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 4211 void *addr = skb_frag_address(frag); 4212 4213 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4214 mvpp2_txdesc_clear_ptp(port, tx_desc); 4215 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4216 mvpp2_txdesc_size_set(port, tx_desc, skb_frag_size(frag)); 4217 4218 buf_dma_addr = dma_map_single(port->dev->dev.parent, addr, 4219 skb_frag_size(frag), 4220 DMA_TO_DEVICE); 4221 if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) { 4222 mvpp2_txq_desc_put(txq); 4223 goto cleanup; 4224 } 4225 4226 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4227 4228 if (i == (skb_shinfo(skb)->nr_frags - 1)) { 4229 /* Last descriptor */ 4230 mvpp2_txdesc_cmd_set(port, tx_desc, 4231 MVPP2_TXD_L_DESC); 4232 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4233 } else { 4234 /* Descriptor in the middle: Not First, Not Last */ 4235 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 4236 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4237 } 4238 } 4239 4240 return 0; 4241 cleanup: 4242 /* Release all descriptors that were used to map fragments of 4243 * this packet, as well as the corresponding DMA mappings 4244 */ 4245 for (i = i - 1; i >= 0; i--) { 4246 tx_desc = txq->descs + i; 4247 tx_desc_unmap_put(port, txq, tx_desc); 4248 } 4249 4250 return -ENOMEM; 4251 } 4252 4253 static inline void mvpp2_tso_put_hdr(struct sk_buff *skb, 4254 struct net_device *dev, 4255 struct mvpp2_tx_queue *txq, 4256 struct mvpp2_tx_queue *aggr_txq, 4257 struct mvpp2_txq_pcpu *txq_pcpu, 4258 int hdr_sz) 4259 { 4260 struct mvpp2_port *port = netdev_priv(dev); 4261 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4262 dma_addr_t addr; 4263 4264 mvpp2_txdesc_clear_ptp(port, tx_desc); 4265 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4266 mvpp2_txdesc_size_set(port, tx_desc, hdr_sz); 4267 4268 addr = txq_pcpu->tso_headers_dma + 4269 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 4270 mvpp2_txdesc_dma_addr_set(port, tx_desc, addr); 4271 4272 mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) | 4273 MVPP2_TXD_F_DESC | 4274 MVPP2_TXD_PADDING_DISABLE); 4275 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4276 } 4277 4278 static inline int mvpp2_tso_put_data(struct sk_buff *skb, 4279 struct net_device *dev, struct tso_t *tso, 4280 struct mvpp2_tx_queue *txq, 4281 struct mvpp2_tx_queue *aggr_txq, 4282 struct mvpp2_txq_pcpu *txq_pcpu, 4283 int sz, bool left, bool last) 4284 { 4285 struct mvpp2_port *port = netdev_priv(dev); 4286 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4287 dma_addr_t buf_dma_addr; 4288 4289 mvpp2_txdesc_clear_ptp(port, tx_desc); 4290 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4291 mvpp2_txdesc_size_set(port, tx_desc, sz); 4292 4293 buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz, 4294 DMA_TO_DEVICE); 4295 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 4296 mvpp2_txq_desc_put(txq); 4297 return -ENOMEM; 4298 } 4299 4300 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4301 4302 if (!left) { 4303 mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC); 4304 if (last) { 4305 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4306 return 0; 4307 } 4308 } else { 4309 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 4310 } 4311 4312 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4313 return 0; 4314 } 4315 4316 static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev, 4317 struct mvpp2_tx_queue *txq, 4318 struct mvpp2_tx_queue *aggr_txq, 4319 struct mvpp2_txq_pcpu *txq_pcpu) 4320 { 4321 struct mvpp2_port *port = netdev_priv(dev); 4322 int hdr_sz, i, len, descs = 0; 4323 struct tso_t tso; 4324 4325 /* Check number of available descriptors */ 4326 if (mvpp2_aggr_desc_num_check(port, aggr_txq, tso_count_descs(skb)) || 4327 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 4328 tso_count_descs(skb))) 4329 return 0; 4330 4331 hdr_sz = tso_start(skb, &tso); 4332 4333 len = skb->len - hdr_sz; 4334 while (len > 0) { 4335 int left = min_t(int, skb_shinfo(skb)->gso_size, len); 4336 char *hdr = txq_pcpu->tso_headers + 4337 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 4338 4339 len -= left; 4340 descs++; 4341 4342 tso_build_hdr(skb, hdr, &tso, left, len == 0); 4343 mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz); 4344 4345 while (left > 0) { 4346 int sz = min_t(int, tso.size, left); 4347 left -= sz; 4348 descs++; 4349 4350 if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq, 4351 txq_pcpu, sz, left, len == 0)) 4352 goto release; 4353 tso_build_data(skb, &tso, sz); 4354 } 4355 } 4356 4357 return descs; 4358 4359 release: 4360 for (i = descs - 1; i >= 0; i--) { 4361 struct mvpp2_tx_desc *tx_desc = txq->descs + i; 4362 tx_desc_unmap_put(port, txq, tx_desc); 4363 } 4364 return 0; 4365 } 4366 4367 /* Main tx processing */ 4368 static netdev_tx_t mvpp2_tx(struct sk_buff *skb, struct net_device *dev) 4369 { 4370 struct mvpp2_port *port = netdev_priv(dev); 4371 struct mvpp2_tx_queue *txq, *aggr_txq; 4372 struct mvpp2_txq_pcpu *txq_pcpu; 4373 struct mvpp2_tx_desc *tx_desc; 4374 dma_addr_t buf_dma_addr; 4375 unsigned long flags = 0; 4376 unsigned int thread; 4377 int frags = 0; 4378 u16 txq_id; 4379 u32 tx_cmd; 4380 4381 thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4382 4383 txq_id = skb_get_queue_mapping(skb); 4384 txq = port->txqs[txq_id]; 4385 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 4386 aggr_txq = &port->priv->aggr_txqs[thread]; 4387 4388 if (test_bit(thread, &port->priv->lock_map)) 4389 spin_lock_irqsave(&port->tx_lock[thread], flags); 4390 4391 if (skb_is_gso(skb)) { 4392 frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu); 4393 goto out; 4394 } 4395 frags = skb_shinfo(skb)->nr_frags + 1; 4396 4397 /* Check number of available descriptors */ 4398 if (mvpp2_aggr_desc_num_check(port, aggr_txq, frags) || 4399 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, frags)) { 4400 frags = 0; 4401 goto out; 4402 } 4403 4404 /* Get a descriptor for the first part of the packet */ 4405 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 4406 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) || 4407 !mvpp2_tx_hw_tstamp(port, tx_desc, skb)) 4408 mvpp2_txdesc_clear_ptp(port, tx_desc); 4409 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 4410 mvpp2_txdesc_size_set(port, tx_desc, skb_headlen(skb)); 4411 4412 buf_dma_addr = dma_map_single(dev->dev.parent, skb->data, 4413 skb_headlen(skb), DMA_TO_DEVICE); 4414 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 4415 mvpp2_txq_desc_put(txq); 4416 frags = 0; 4417 goto out; 4418 } 4419 4420 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 4421 4422 tx_cmd = mvpp2_skb_tx_csum(port, skb); 4423 4424 if (frags == 1) { 4425 /* First and Last descriptor */ 4426 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 4427 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 4428 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 4429 } else { 4430 /* First but not Last */ 4431 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE; 4432 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 4433 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 4434 4435 /* Continue with other skb fragments */ 4436 if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) { 4437 tx_desc_unmap_put(port, txq, tx_desc); 4438 frags = 0; 4439 } 4440 } 4441 4442 out: 4443 if (frags > 0) { 4444 struct mvpp2_pcpu_stats *stats = per_cpu_ptr(port->stats, thread); 4445 struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); 4446 4447 txq_pcpu->reserved_num -= frags; 4448 txq_pcpu->count += frags; 4449 aggr_txq->count += frags; 4450 4451 /* Enable transmit */ 4452 wmb(); 4453 mvpp2_aggr_txq_pend_desc_add(port, frags); 4454 4455 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 4456 netif_tx_stop_queue(nq); 4457 4458 u64_stats_update_begin(&stats->syncp); 4459 stats->tx_packets++; 4460 stats->tx_bytes += skb->len; 4461 u64_stats_update_end(&stats->syncp); 4462 } else { 4463 dev->stats.tx_dropped++; 4464 dev_kfree_skb_any(skb); 4465 } 4466 4467 /* Finalize TX processing */ 4468 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 4469 mvpp2_txq_done(port, txq, txq_pcpu); 4470 4471 /* Set the timer in case not all frags were processed */ 4472 if (!port->has_tx_irqs && txq_pcpu->count <= frags && 4473 txq_pcpu->count > 0) { 4474 struct mvpp2_port_pcpu *port_pcpu = per_cpu_ptr(port->pcpu, thread); 4475 4476 if (!port_pcpu->timer_scheduled) { 4477 port_pcpu->timer_scheduled = true; 4478 hrtimer_start(&port_pcpu->tx_done_timer, 4479 MVPP2_TXDONE_HRTIMER_PERIOD_NS, 4480 HRTIMER_MODE_REL_PINNED_SOFT); 4481 } 4482 } 4483 4484 if (test_bit(thread, &port->priv->lock_map)) 4485 spin_unlock_irqrestore(&port->tx_lock[thread], flags); 4486 4487 return NETDEV_TX_OK; 4488 } 4489 4490 static inline void mvpp2_cause_error(struct net_device *dev, int cause) 4491 { 4492 if (cause & MVPP2_CAUSE_FCS_ERR_MASK) 4493 netdev_err(dev, "FCS error\n"); 4494 if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK) 4495 netdev_err(dev, "rx fifo overrun error\n"); 4496 if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK) 4497 netdev_err(dev, "tx fifo underrun error\n"); 4498 } 4499 4500 static int mvpp2_poll(struct napi_struct *napi, int budget) 4501 { 4502 u32 cause_rx_tx, cause_rx, cause_tx, cause_misc; 4503 int rx_done = 0; 4504 struct mvpp2_port *port = netdev_priv(napi->dev); 4505 struct mvpp2_queue_vector *qv; 4506 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 4507 4508 qv = container_of(napi, struct mvpp2_queue_vector, napi); 4509 4510 /* Rx/Tx cause register 4511 * 4512 * Bits 0-15: each bit indicates received packets on the Rx queue 4513 * (bit 0 is for Rx queue 0). 4514 * 4515 * Bits 16-23: each bit indicates transmitted packets on the Tx queue 4516 * (bit 16 is for Tx queue 0). 4517 * 4518 * Each CPU has its own Rx/Tx cause register 4519 */ 4520 cause_rx_tx = mvpp2_thread_read_relaxed(port->priv, qv->sw_thread_id, 4521 MVPP2_ISR_RX_TX_CAUSE_REG(port->id)); 4522 4523 cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK; 4524 if (cause_misc) { 4525 mvpp2_cause_error(port->dev, cause_misc); 4526 4527 /* Clear the cause register */ 4528 mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0); 4529 mvpp2_thread_write(port->priv, thread, 4530 MVPP2_ISR_RX_TX_CAUSE_REG(port->id), 4531 cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK); 4532 } 4533 4534 if (port->has_tx_irqs) { 4535 cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 4536 if (cause_tx) { 4537 cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET; 4538 mvpp2_tx_done(port, cause_tx, qv->sw_thread_id); 4539 } 4540 } 4541 4542 /* Process RX packets */ 4543 cause_rx = cause_rx_tx & 4544 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 4545 cause_rx <<= qv->first_rxq; 4546 cause_rx |= qv->pending_cause_rx; 4547 while (cause_rx && budget > 0) { 4548 int count; 4549 struct mvpp2_rx_queue *rxq; 4550 4551 rxq = mvpp2_get_rx_queue(port, cause_rx); 4552 if (!rxq) 4553 break; 4554 4555 count = mvpp2_rx(port, napi, budget, rxq); 4556 rx_done += count; 4557 budget -= count; 4558 if (budget > 0) { 4559 /* Clear the bit associated to this Rx queue 4560 * so that next iteration will continue from 4561 * the next Rx queue. 4562 */ 4563 cause_rx &= ~(1 << rxq->logic_rxq); 4564 } 4565 } 4566 4567 if (budget > 0) { 4568 cause_rx = 0; 4569 napi_complete_done(napi, rx_done); 4570 4571 mvpp2_qvec_interrupt_enable(qv); 4572 } 4573 qv->pending_cause_rx = cause_rx; 4574 return rx_done; 4575 } 4576 4577 static void mvpp22_mode_reconfigure(struct mvpp2_port *port, 4578 phy_interface_t interface) 4579 { 4580 u32 ctrl3; 4581 4582 /* Set the GMAC & XLG MAC in reset */ 4583 mvpp2_mac_reset_assert(port); 4584 4585 /* Set the MPCS and XPCS in reset */ 4586 mvpp22_pcs_reset_assert(port); 4587 4588 /* comphy reconfiguration */ 4589 mvpp22_comphy_init(port, interface); 4590 4591 /* gop reconfiguration */ 4592 mvpp22_gop_init(port, interface); 4593 4594 mvpp22_pcs_reset_deassert(port, interface); 4595 4596 if (mvpp2_port_supports_xlg(port)) { 4597 ctrl3 = readl(port->base + MVPP22_XLG_CTRL3_REG); 4598 ctrl3 &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 4599 4600 if (mvpp2_is_xlg(interface)) 4601 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_10G; 4602 else 4603 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC; 4604 4605 writel(ctrl3, port->base + MVPP22_XLG_CTRL3_REG); 4606 } 4607 4608 if (mvpp2_port_supports_xlg(port) && mvpp2_is_xlg(interface)) 4609 mvpp2_xlg_max_rx_size_set(port); 4610 else 4611 mvpp2_gmac_max_rx_size_set(port); 4612 } 4613 4614 /* Set hw internals when starting port */ 4615 static void mvpp2_start_dev(struct mvpp2_port *port) 4616 { 4617 int i; 4618 4619 mvpp2_txp_max_tx_size_set(port); 4620 4621 for (i = 0; i < port->nqvecs; i++) 4622 napi_enable(&port->qvecs[i].napi); 4623 4624 /* Enable interrupts on all threads */ 4625 mvpp2_interrupts_enable(port); 4626 4627 if (port->priv->hw_version >= MVPP22) 4628 mvpp22_mode_reconfigure(port, port->phy_interface); 4629 4630 if (port->phylink) { 4631 phylink_start(port->phylink); 4632 } else { 4633 mvpp2_acpi_start(port); 4634 } 4635 4636 netif_tx_start_all_queues(port->dev); 4637 4638 clear_bit(0, &port->state); 4639 } 4640 4641 /* Set hw internals when stopping port */ 4642 static void mvpp2_stop_dev(struct mvpp2_port *port) 4643 { 4644 int i; 4645 4646 set_bit(0, &port->state); 4647 4648 /* Disable interrupts on all threads */ 4649 mvpp2_interrupts_disable(port); 4650 4651 for (i = 0; i < port->nqvecs; i++) 4652 napi_disable(&port->qvecs[i].napi); 4653 4654 if (port->phylink) 4655 phylink_stop(port->phylink); 4656 phy_power_off(port->comphy); 4657 } 4658 4659 static int mvpp2_check_ringparam_valid(struct net_device *dev, 4660 struct ethtool_ringparam *ring) 4661 { 4662 u16 new_rx_pending = ring->rx_pending; 4663 u16 new_tx_pending = ring->tx_pending; 4664 4665 if (ring->rx_pending == 0 || ring->tx_pending == 0) 4666 return -EINVAL; 4667 4668 if (ring->rx_pending > MVPP2_MAX_RXD_MAX) 4669 new_rx_pending = MVPP2_MAX_RXD_MAX; 4670 else if (ring->rx_pending < MSS_THRESHOLD_START) 4671 new_rx_pending = MSS_THRESHOLD_START; 4672 else if (!IS_ALIGNED(ring->rx_pending, 16)) 4673 new_rx_pending = ALIGN(ring->rx_pending, 16); 4674 4675 if (ring->tx_pending > MVPP2_MAX_TXD_MAX) 4676 new_tx_pending = MVPP2_MAX_TXD_MAX; 4677 else if (!IS_ALIGNED(ring->tx_pending, 32)) 4678 new_tx_pending = ALIGN(ring->tx_pending, 32); 4679 4680 /* The Tx ring size cannot be smaller than the minimum number of 4681 * descriptors needed for TSO. 4682 */ 4683 if (new_tx_pending < MVPP2_MAX_SKB_DESCS) 4684 new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32); 4685 4686 if (ring->rx_pending != new_rx_pending) { 4687 netdev_info(dev, "illegal Rx ring size value %d, round to %d\n", 4688 ring->rx_pending, new_rx_pending); 4689 ring->rx_pending = new_rx_pending; 4690 } 4691 4692 if (ring->tx_pending != new_tx_pending) { 4693 netdev_info(dev, "illegal Tx ring size value %d, round to %d\n", 4694 ring->tx_pending, new_tx_pending); 4695 ring->tx_pending = new_tx_pending; 4696 } 4697 4698 return 0; 4699 } 4700 4701 static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr) 4702 { 4703 u32 mac_addr_l, mac_addr_m, mac_addr_h; 4704 4705 mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 4706 mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE); 4707 mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH); 4708 addr[0] = (mac_addr_h >> 24) & 0xFF; 4709 addr[1] = (mac_addr_h >> 16) & 0xFF; 4710 addr[2] = (mac_addr_h >> 8) & 0xFF; 4711 addr[3] = mac_addr_h & 0xFF; 4712 addr[4] = mac_addr_m & 0xFF; 4713 addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF; 4714 } 4715 4716 static int mvpp2_irqs_init(struct mvpp2_port *port) 4717 { 4718 int err, i; 4719 4720 for (i = 0; i < port->nqvecs; i++) { 4721 struct mvpp2_queue_vector *qv = port->qvecs + i; 4722 4723 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4724 qv->mask = kzalloc(cpumask_size(), GFP_KERNEL); 4725 if (!qv->mask) { 4726 err = -ENOMEM; 4727 goto err; 4728 } 4729 4730 irq_set_status_flags(qv->irq, IRQ_NO_BALANCING); 4731 } 4732 4733 err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv); 4734 if (err) 4735 goto err; 4736 4737 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4738 unsigned int cpu; 4739 4740 for_each_present_cpu(cpu) { 4741 if (mvpp2_cpu_to_thread(port->priv, cpu) == 4742 qv->sw_thread_id) 4743 cpumask_set_cpu(cpu, qv->mask); 4744 } 4745 4746 irq_set_affinity_hint(qv->irq, qv->mask); 4747 } 4748 } 4749 4750 return 0; 4751 err: 4752 for (i = 0; i < port->nqvecs; i++) { 4753 struct mvpp2_queue_vector *qv = port->qvecs + i; 4754 4755 irq_set_affinity_hint(qv->irq, NULL); 4756 kfree(qv->mask); 4757 qv->mask = NULL; 4758 free_irq(qv->irq, qv); 4759 } 4760 4761 return err; 4762 } 4763 4764 static void mvpp2_irqs_deinit(struct mvpp2_port *port) 4765 { 4766 int i; 4767 4768 for (i = 0; i < port->nqvecs; i++) { 4769 struct mvpp2_queue_vector *qv = port->qvecs + i; 4770 4771 irq_set_affinity_hint(qv->irq, NULL); 4772 kfree(qv->mask); 4773 qv->mask = NULL; 4774 irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING); 4775 free_irq(qv->irq, qv); 4776 } 4777 } 4778 4779 static bool mvpp22_rss_is_supported(struct mvpp2_port *port) 4780 { 4781 return (queue_mode == MVPP2_QDIST_MULTI_MODE) && 4782 !(port->flags & MVPP2_F_LOOPBACK); 4783 } 4784 4785 static int mvpp2_open(struct net_device *dev) 4786 { 4787 struct mvpp2_port *port = netdev_priv(dev); 4788 struct mvpp2 *priv = port->priv; 4789 unsigned char mac_bcast[ETH_ALEN] = { 4790 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 4791 bool valid = false; 4792 int err; 4793 4794 err = mvpp2_prs_mac_da_accept(port, mac_bcast, true); 4795 if (err) { 4796 netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n"); 4797 return err; 4798 } 4799 err = mvpp2_prs_mac_da_accept(port, dev->dev_addr, true); 4800 if (err) { 4801 netdev_err(dev, "mvpp2_prs_mac_da_accept own addr failed\n"); 4802 return err; 4803 } 4804 err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH); 4805 if (err) { 4806 netdev_err(dev, "mvpp2_prs_tag_mode_set failed\n"); 4807 return err; 4808 } 4809 err = mvpp2_prs_def_flow(port); 4810 if (err) { 4811 netdev_err(dev, "mvpp2_prs_def_flow failed\n"); 4812 return err; 4813 } 4814 4815 /* Allocate the Rx/Tx queues */ 4816 err = mvpp2_setup_rxqs(port); 4817 if (err) { 4818 netdev_err(port->dev, "cannot allocate Rx queues\n"); 4819 return err; 4820 } 4821 4822 err = mvpp2_setup_txqs(port); 4823 if (err) { 4824 netdev_err(port->dev, "cannot allocate Tx queues\n"); 4825 goto err_cleanup_rxqs; 4826 } 4827 4828 err = mvpp2_irqs_init(port); 4829 if (err) { 4830 netdev_err(port->dev, "cannot init IRQs\n"); 4831 goto err_cleanup_txqs; 4832 } 4833 4834 if (port->phylink) { 4835 err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0); 4836 if (err) { 4837 netdev_err(port->dev, "could not attach PHY (%d)\n", 4838 err); 4839 goto err_free_irq; 4840 } 4841 4842 valid = true; 4843 } 4844 4845 if (priv->hw_version >= MVPP22 && port->port_irq) { 4846 err = request_irq(port->port_irq, mvpp2_port_isr, 0, 4847 dev->name, port); 4848 if (err) { 4849 netdev_err(port->dev, 4850 "cannot request port link/ptp IRQ %d\n", 4851 port->port_irq); 4852 goto err_free_irq; 4853 } 4854 4855 mvpp22_gop_setup_irq(port); 4856 4857 /* In default link is down */ 4858 netif_carrier_off(port->dev); 4859 4860 valid = true; 4861 } else { 4862 port->port_irq = 0; 4863 } 4864 4865 if (!valid) { 4866 netdev_err(port->dev, 4867 "invalid configuration: no dt or link IRQ"); 4868 err = -ENOENT; 4869 goto err_free_irq; 4870 } 4871 4872 /* Unmask interrupts on all CPUs */ 4873 on_each_cpu(mvpp2_interrupts_unmask, port, 1); 4874 mvpp2_shared_interrupt_mask_unmask(port, false); 4875 4876 mvpp2_start_dev(port); 4877 4878 /* Start hardware statistics gathering */ 4879 queue_delayed_work(priv->stats_queue, &port->stats_work, 4880 MVPP2_MIB_COUNTERS_STATS_DELAY); 4881 4882 return 0; 4883 4884 err_free_irq: 4885 mvpp2_irqs_deinit(port); 4886 err_cleanup_txqs: 4887 mvpp2_cleanup_txqs(port); 4888 err_cleanup_rxqs: 4889 mvpp2_cleanup_rxqs(port); 4890 return err; 4891 } 4892 4893 static int mvpp2_stop(struct net_device *dev) 4894 { 4895 struct mvpp2_port *port = netdev_priv(dev); 4896 struct mvpp2_port_pcpu *port_pcpu; 4897 unsigned int thread; 4898 4899 mvpp2_stop_dev(port); 4900 4901 /* Mask interrupts on all threads */ 4902 on_each_cpu(mvpp2_interrupts_mask, port, 1); 4903 mvpp2_shared_interrupt_mask_unmask(port, true); 4904 4905 if (port->phylink) 4906 phylink_disconnect_phy(port->phylink); 4907 if (port->port_irq) 4908 free_irq(port->port_irq, port); 4909 4910 mvpp2_irqs_deinit(port); 4911 if (!port->has_tx_irqs) { 4912 for (thread = 0; thread < port->priv->nthreads; thread++) { 4913 port_pcpu = per_cpu_ptr(port->pcpu, thread); 4914 4915 hrtimer_cancel(&port_pcpu->tx_done_timer); 4916 port_pcpu->timer_scheduled = false; 4917 } 4918 } 4919 mvpp2_cleanup_rxqs(port); 4920 mvpp2_cleanup_txqs(port); 4921 4922 cancel_delayed_work_sync(&port->stats_work); 4923 4924 mvpp2_mac_reset_assert(port); 4925 mvpp22_pcs_reset_assert(port); 4926 4927 return 0; 4928 } 4929 4930 static int mvpp2_prs_mac_da_accept_list(struct mvpp2_port *port, 4931 struct netdev_hw_addr_list *list) 4932 { 4933 struct netdev_hw_addr *ha; 4934 int ret; 4935 4936 netdev_hw_addr_list_for_each(ha, list) { 4937 ret = mvpp2_prs_mac_da_accept(port, ha->addr, true); 4938 if (ret) 4939 return ret; 4940 } 4941 4942 return 0; 4943 } 4944 4945 static void mvpp2_set_rx_promisc(struct mvpp2_port *port, bool enable) 4946 { 4947 if (!enable && (port->dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 4948 mvpp2_prs_vid_enable_filtering(port); 4949 else 4950 mvpp2_prs_vid_disable_filtering(port); 4951 4952 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4953 MVPP2_PRS_L2_UNI_CAST, enable); 4954 4955 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4956 MVPP2_PRS_L2_MULTI_CAST, enable); 4957 } 4958 4959 static void mvpp2_set_rx_mode(struct net_device *dev) 4960 { 4961 struct mvpp2_port *port = netdev_priv(dev); 4962 4963 /* Clear the whole UC and MC list */ 4964 mvpp2_prs_mac_del_all(port); 4965 4966 if (dev->flags & IFF_PROMISC) { 4967 mvpp2_set_rx_promisc(port, true); 4968 return; 4969 } 4970 4971 mvpp2_set_rx_promisc(port, false); 4972 4973 if (netdev_uc_count(dev) > MVPP2_PRS_MAC_UC_FILT_MAX || 4974 mvpp2_prs_mac_da_accept_list(port, &dev->uc)) 4975 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4976 MVPP2_PRS_L2_UNI_CAST, true); 4977 4978 if (dev->flags & IFF_ALLMULTI) { 4979 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4980 MVPP2_PRS_L2_MULTI_CAST, true); 4981 return; 4982 } 4983 4984 if (netdev_mc_count(dev) > MVPP2_PRS_MAC_MC_FILT_MAX || 4985 mvpp2_prs_mac_da_accept_list(port, &dev->mc)) 4986 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4987 MVPP2_PRS_L2_MULTI_CAST, true); 4988 } 4989 4990 static int mvpp2_set_mac_address(struct net_device *dev, void *p) 4991 { 4992 const struct sockaddr *addr = p; 4993 int err; 4994 4995 if (!is_valid_ether_addr(addr->sa_data)) 4996 return -EADDRNOTAVAIL; 4997 4998 err = mvpp2_prs_update_mac_da(dev, addr->sa_data); 4999 if (err) { 5000 /* Reconfigure parser accept the original MAC address */ 5001 mvpp2_prs_update_mac_da(dev, dev->dev_addr); 5002 netdev_err(dev, "failed to change MAC address\n"); 5003 } 5004 return err; 5005 } 5006 5007 /* Shut down all the ports, reconfigure the pools as percpu or shared, 5008 * then bring up again all ports. 5009 */ 5010 static int mvpp2_bm_switch_buffers(struct mvpp2 *priv, bool percpu) 5011 { 5012 bool change_percpu = (percpu != priv->percpu_pools); 5013 int numbufs = MVPP2_BM_POOLS_NUM, i; 5014 struct mvpp2_port *port = NULL; 5015 bool status[MVPP2_MAX_PORTS]; 5016 5017 for (i = 0; i < priv->port_count; i++) { 5018 port = priv->port_list[i]; 5019 status[i] = netif_running(port->dev); 5020 if (status[i]) 5021 mvpp2_stop(port->dev); 5022 } 5023 5024 /* nrxqs is the same for all ports */ 5025 if (priv->percpu_pools) 5026 numbufs = port->nrxqs * 2; 5027 5028 if (change_percpu) 5029 mvpp2_bm_pool_update_priv_fc(priv, false); 5030 5031 for (i = 0; i < numbufs; i++) 5032 mvpp2_bm_pool_destroy(port->dev->dev.parent, priv, &priv->bm_pools[i]); 5033 5034 devm_kfree(port->dev->dev.parent, priv->bm_pools); 5035 priv->percpu_pools = percpu; 5036 mvpp2_bm_init(port->dev->dev.parent, priv); 5037 5038 for (i = 0; i < priv->port_count; i++) { 5039 port = priv->port_list[i]; 5040 if (percpu && port->ntxqs >= num_possible_cpus() * 2) 5041 xdp_set_features_flag(port->dev, 5042 NETDEV_XDP_ACT_BASIC | 5043 NETDEV_XDP_ACT_REDIRECT | 5044 NETDEV_XDP_ACT_NDO_XMIT); 5045 else 5046 xdp_clear_features_flag(port->dev); 5047 5048 mvpp2_swf_bm_pool_init(port); 5049 if (status[i]) 5050 mvpp2_open(port->dev); 5051 } 5052 5053 if (change_percpu) 5054 mvpp2_bm_pool_update_priv_fc(priv, true); 5055 5056 return 0; 5057 } 5058 5059 static int mvpp2_change_mtu(struct net_device *dev, int mtu) 5060 { 5061 struct mvpp2_port *port = netdev_priv(dev); 5062 bool running = netif_running(dev); 5063 struct mvpp2 *priv = port->priv; 5064 int err; 5065 5066 if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) { 5067 netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu, 5068 ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8)); 5069 mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8); 5070 } 5071 5072 if (port->xdp_prog && mtu > MVPP2_MAX_RX_BUF_SIZE) { 5073 netdev_err(dev, "Illegal MTU value %d (> %d) for XDP mode\n", 5074 mtu, (int)MVPP2_MAX_RX_BUF_SIZE); 5075 return -EINVAL; 5076 } 5077 5078 if (MVPP2_RX_PKT_SIZE(mtu) > MVPP2_BM_LONG_PKT_SIZE) { 5079 if (priv->percpu_pools) { 5080 netdev_warn(dev, "mtu %d too high, switching to shared buffers", mtu); 5081 mvpp2_bm_switch_buffers(priv, false); 5082 } 5083 } else { 5084 bool jumbo = false; 5085 int i; 5086 5087 for (i = 0; i < priv->port_count; i++) 5088 if (priv->port_list[i] != port && 5089 MVPP2_RX_PKT_SIZE(priv->port_list[i]->dev->mtu) > 5090 MVPP2_BM_LONG_PKT_SIZE) { 5091 jumbo = true; 5092 break; 5093 } 5094 5095 /* No port is using jumbo frames */ 5096 if (!jumbo) { 5097 dev_info(port->dev->dev.parent, 5098 "all ports have a low MTU, switching to per-cpu buffers"); 5099 mvpp2_bm_switch_buffers(priv, true); 5100 } 5101 } 5102 5103 if (running) 5104 mvpp2_stop_dev(port); 5105 5106 err = mvpp2_bm_update_mtu(dev, mtu); 5107 if (err) { 5108 netdev_err(dev, "failed to change MTU\n"); 5109 /* Reconfigure BM to the original MTU */ 5110 mvpp2_bm_update_mtu(dev, dev->mtu); 5111 } else { 5112 port->pkt_size = MVPP2_RX_PKT_SIZE(mtu); 5113 } 5114 5115 if (running) { 5116 mvpp2_start_dev(port); 5117 mvpp2_egress_enable(port); 5118 mvpp2_ingress_enable(port); 5119 } 5120 5121 return err; 5122 } 5123 5124 static int mvpp2_check_pagepool_dma(struct mvpp2_port *port) 5125 { 5126 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 5127 struct mvpp2 *priv = port->priv; 5128 int err = -1, i; 5129 5130 if (!priv->percpu_pools) 5131 return err; 5132 5133 if (!priv->page_pool[0]) 5134 return -ENOMEM; 5135 5136 for (i = 0; i < priv->port_count; i++) { 5137 port = priv->port_list[i]; 5138 if (port->xdp_prog) { 5139 dma_dir = DMA_BIDIRECTIONAL; 5140 break; 5141 } 5142 } 5143 5144 /* All pools are equal in terms of DMA direction */ 5145 if (priv->page_pool[0]->p.dma_dir != dma_dir) 5146 err = mvpp2_bm_switch_buffers(priv, true); 5147 5148 return err; 5149 } 5150 5151 static void 5152 mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 5153 { 5154 struct mvpp2_port *port = netdev_priv(dev); 5155 unsigned int start; 5156 unsigned int cpu; 5157 5158 for_each_possible_cpu(cpu) { 5159 struct mvpp2_pcpu_stats *cpu_stats; 5160 u64 rx_packets; 5161 u64 rx_bytes; 5162 u64 tx_packets; 5163 u64 tx_bytes; 5164 5165 cpu_stats = per_cpu_ptr(port->stats, cpu); 5166 do { 5167 start = u64_stats_fetch_begin(&cpu_stats->syncp); 5168 rx_packets = cpu_stats->rx_packets; 5169 rx_bytes = cpu_stats->rx_bytes; 5170 tx_packets = cpu_stats->tx_packets; 5171 tx_bytes = cpu_stats->tx_bytes; 5172 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start)); 5173 5174 stats->rx_packets += rx_packets; 5175 stats->rx_bytes += rx_bytes; 5176 stats->tx_packets += tx_packets; 5177 stats->tx_bytes += tx_bytes; 5178 } 5179 5180 stats->rx_errors = dev->stats.rx_errors; 5181 stats->rx_dropped = dev->stats.rx_dropped; 5182 stats->tx_dropped = dev->stats.tx_dropped; 5183 } 5184 5185 static int mvpp2_set_ts_config(struct mvpp2_port *port, struct ifreq *ifr) 5186 { 5187 struct hwtstamp_config config; 5188 void __iomem *ptp; 5189 u32 gcr, int_mask; 5190 5191 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 5192 return -EFAULT; 5193 5194 if (config.tx_type != HWTSTAMP_TX_OFF && 5195 config.tx_type != HWTSTAMP_TX_ON) 5196 return -ERANGE; 5197 5198 ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id); 5199 5200 int_mask = gcr = 0; 5201 if (config.tx_type != HWTSTAMP_TX_OFF) { 5202 gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_TX_RESET; 5203 int_mask |= MVPP22_PTP_INT_MASK_QUEUE1 | 5204 MVPP22_PTP_INT_MASK_QUEUE0; 5205 } 5206 5207 /* It seems we must also release the TX reset when enabling the TSU */ 5208 if (config.rx_filter != HWTSTAMP_FILTER_NONE) 5209 gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_RX_RESET | 5210 MVPP22_PTP_GCR_TX_RESET; 5211 5212 if (gcr & MVPP22_PTP_GCR_TSU_ENABLE) 5213 mvpp22_tai_start(port->priv->tai); 5214 5215 if (config.rx_filter != HWTSTAMP_FILTER_NONE) { 5216 config.rx_filter = HWTSTAMP_FILTER_ALL; 5217 mvpp2_modify(ptp + MVPP22_PTP_GCR, 5218 MVPP22_PTP_GCR_RX_RESET | 5219 MVPP22_PTP_GCR_TX_RESET | 5220 MVPP22_PTP_GCR_TSU_ENABLE, gcr); 5221 port->rx_hwtstamp = true; 5222 } else { 5223 port->rx_hwtstamp = false; 5224 mvpp2_modify(ptp + MVPP22_PTP_GCR, 5225 MVPP22_PTP_GCR_RX_RESET | 5226 MVPP22_PTP_GCR_TX_RESET | 5227 MVPP22_PTP_GCR_TSU_ENABLE, gcr); 5228 } 5229 5230 mvpp2_modify(ptp + MVPP22_PTP_INT_MASK, 5231 MVPP22_PTP_INT_MASK_QUEUE1 | 5232 MVPP22_PTP_INT_MASK_QUEUE0, int_mask); 5233 5234 if (!(gcr & MVPP22_PTP_GCR_TSU_ENABLE)) 5235 mvpp22_tai_stop(port->priv->tai); 5236 5237 port->tx_hwtstamp_type = config.tx_type; 5238 5239 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 5240 return -EFAULT; 5241 5242 return 0; 5243 } 5244 5245 static int mvpp2_get_ts_config(struct mvpp2_port *port, struct ifreq *ifr) 5246 { 5247 struct hwtstamp_config config; 5248 5249 memset(&config, 0, sizeof(config)); 5250 5251 config.tx_type = port->tx_hwtstamp_type; 5252 config.rx_filter = port->rx_hwtstamp ? 5253 HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE; 5254 5255 if (copy_to_user(ifr->ifr_data, &config, sizeof(config))) 5256 return -EFAULT; 5257 5258 return 0; 5259 } 5260 5261 static int mvpp2_ethtool_get_ts_info(struct net_device *dev, 5262 struct kernel_ethtool_ts_info *info) 5263 { 5264 struct mvpp2_port *port = netdev_priv(dev); 5265 5266 if (!port->hwtstamp) 5267 return -EOPNOTSUPP; 5268 5269 info->phc_index = mvpp22_tai_ptp_clock_index(port->priv->tai); 5270 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | 5271 SOF_TIMESTAMPING_TX_HARDWARE | 5272 SOF_TIMESTAMPING_RX_HARDWARE | 5273 SOF_TIMESTAMPING_RAW_HARDWARE; 5274 info->tx_types = BIT(HWTSTAMP_TX_OFF) | 5275 BIT(HWTSTAMP_TX_ON); 5276 info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | 5277 BIT(HWTSTAMP_FILTER_ALL); 5278 5279 return 0; 5280 } 5281 5282 static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 5283 { 5284 struct mvpp2_port *port = netdev_priv(dev); 5285 5286 switch (cmd) { 5287 case SIOCSHWTSTAMP: 5288 if (port->hwtstamp) 5289 return mvpp2_set_ts_config(port, ifr); 5290 break; 5291 5292 case SIOCGHWTSTAMP: 5293 if (port->hwtstamp) 5294 return mvpp2_get_ts_config(port, ifr); 5295 break; 5296 } 5297 5298 if (!port->phylink) 5299 return -ENOTSUPP; 5300 5301 return phylink_mii_ioctl(port->phylink, ifr, cmd); 5302 } 5303 5304 static int mvpp2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 5305 { 5306 struct mvpp2_port *port = netdev_priv(dev); 5307 int ret; 5308 5309 ret = mvpp2_prs_vid_entry_add(port, vid); 5310 if (ret) 5311 netdev_err(dev, "rx-vlan-filter offloading cannot accept more than %d VIDs per port\n", 5312 MVPP2_PRS_VLAN_FILT_MAX - 1); 5313 return ret; 5314 } 5315 5316 static int mvpp2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 5317 { 5318 struct mvpp2_port *port = netdev_priv(dev); 5319 5320 mvpp2_prs_vid_entry_remove(port, vid); 5321 return 0; 5322 } 5323 5324 static int mvpp2_set_features(struct net_device *dev, 5325 netdev_features_t features) 5326 { 5327 netdev_features_t changed = dev->features ^ features; 5328 struct mvpp2_port *port = netdev_priv(dev); 5329 5330 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { 5331 if (features & NETIF_F_HW_VLAN_CTAG_FILTER) { 5332 mvpp2_prs_vid_enable_filtering(port); 5333 } else { 5334 /* Invalidate all registered VID filters for this 5335 * port 5336 */ 5337 mvpp2_prs_vid_remove_all(port); 5338 5339 mvpp2_prs_vid_disable_filtering(port); 5340 } 5341 } 5342 5343 if (changed & NETIF_F_RXHASH) { 5344 if (features & NETIF_F_RXHASH) 5345 mvpp22_port_rss_enable(port); 5346 else 5347 mvpp22_port_rss_disable(port); 5348 } 5349 5350 return 0; 5351 } 5352 5353 static int mvpp2_xdp_setup(struct mvpp2_port *port, struct netdev_bpf *bpf) 5354 { 5355 struct bpf_prog *prog = bpf->prog, *old_prog; 5356 bool running = netif_running(port->dev); 5357 bool reset = !prog != !port->xdp_prog; 5358 5359 if (port->dev->mtu > MVPP2_MAX_RX_BUF_SIZE) { 5360 NL_SET_ERR_MSG_MOD(bpf->extack, "MTU too large for XDP"); 5361 return -EOPNOTSUPP; 5362 } 5363 5364 if (!port->priv->percpu_pools) { 5365 NL_SET_ERR_MSG_MOD(bpf->extack, "Per CPU Pools required for XDP"); 5366 return -EOPNOTSUPP; 5367 } 5368 5369 if (port->ntxqs < num_possible_cpus() * 2) { 5370 NL_SET_ERR_MSG_MOD(bpf->extack, "XDP_TX needs two TX queues per CPU"); 5371 return -EOPNOTSUPP; 5372 } 5373 5374 /* device is up and bpf is added/removed, must setup the RX queues */ 5375 if (running && reset) 5376 mvpp2_stop(port->dev); 5377 5378 old_prog = xchg(&port->xdp_prog, prog); 5379 if (old_prog) 5380 bpf_prog_put(old_prog); 5381 5382 /* bpf is just replaced, RXQ and MTU are already setup */ 5383 if (!reset) 5384 return 0; 5385 5386 /* device was up, restore the link */ 5387 if (running) 5388 mvpp2_open(port->dev); 5389 5390 /* Check Page Pool DMA Direction */ 5391 mvpp2_check_pagepool_dma(port); 5392 5393 return 0; 5394 } 5395 5396 static int mvpp2_xdp(struct net_device *dev, struct netdev_bpf *xdp) 5397 { 5398 struct mvpp2_port *port = netdev_priv(dev); 5399 5400 switch (xdp->command) { 5401 case XDP_SETUP_PROG: 5402 return mvpp2_xdp_setup(port, xdp); 5403 default: 5404 return -EINVAL; 5405 } 5406 } 5407 5408 /* Ethtool methods */ 5409 5410 static int mvpp2_ethtool_nway_reset(struct net_device *dev) 5411 { 5412 struct mvpp2_port *port = netdev_priv(dev); 5413 5414 if (!port->phylink) 5415 return -ENOTSUPP; 5416 5417 return phylink_ethtool_nway_reset(port->phylink); 5418 } 5419 5420 /* Set interrupt coalescing for ethtools */ 5421 static int 5422 mvpp2_ethtool_set_coalesce(struct net_device *dev, 5423 struct ethtool_coalesce *c, 5424 struct kernel_ethtool_coalesce *kernel_coal, 5425 struct netlink_ext_ack *extack) 5426 { 5427 struct mvpp2_port *port = netdev_priv(dev); 5428 int queue; 5429 5430 for (queue = 0; queue < port->nrxqs; queue++) { 5431 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 5432 5433 rxq->time_coal = c->rx_coalesce_usecs; 5434 rxq->pkts_coal = c->rx_max_coalesced_frames; 5435 mvpp2_rx_pkts_coal_set(port, rxq); 5436 mvpp2_rx_time_coal_set(port, rxq); 5437 } 5438 5439 if (port->has_tx_irqs) { 5440 port->tx_time_coal = c->tx_coalesce_usecs; 5441 mvpp2_tx_time_coal_set(port); 5442 } 5443 5444 for (queue = 0; queue < port->ntxqs; queue++) { 5445 struct mvpp2_tx_queue *txq = port->txqs[queue]; 5446 5447 txq->done_pkts_coal = c->tx_max_coalesced_frames; 5448 5449 if (port->has_tx_irqs) 5450 mvpp2_tx_pkts_coal_set(port, txq); 5451 } 5452 5453 return 0; 5454 } 5455 5456 /* get coalescing for ethtools */ 5457 static int 5458 mvpp2_ethtool_get_coalesce(struct net_device *dev, 5459 struct ethtool_coalesce *c, 5460 struct kernel_ethtool_coalesce *kernel_coal, 5461 struct netlink_ext_ack *extack) 5462 { 5463 struct mvpp2_port *port = netdev_priv(dev); 5464 5465 c->rx_coalesce_usecs = port->rxqs[0]->time_coal; 5466 c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal; 5467 c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal; 5468 c->tx_coalesce_usecs = port->tx_time_coal; 5469 return 0; 5470 } 5471 5472 static void mvpp2_ethtool_get_drvinfo(struct net_device *dev, 5473 struct ethtool_drvinfo *drvinfo) 5474 { 5475 strscpy(drvinfo->driver, MVPP2_DRIVER_NAME, 5476 sizeof(drvinfo->driver)); 5477 strscpy(drvinfo->version, MVPP2_DRIVER_VERSION, 5478 sizeof(drvinfo->version)); 5479 strscpy(drvinfo->bus_info, dev_name(&dev->dev), 5480 sizeof(drvinfo->bus_info)); 5481 } 5482 5483 static void 5484 mvpp2_ethtool_get_ringparam(struct net_device *dev, 5485 struct ethtool_ringparam *ring, 5486 struct kernel_ethtool_ringparam *kernel_ring, 5487 struct netlink_ext_ack *extack) 5488 { 5489 struct mvpp2_port *port = netdev_priv(dev); 5490 5491 ring->rx_max_pending = MVPP2_MAX_RXD_MAX; 5492 ring->tx_max_pending = MVPP2_MAX_TXD_MAX; 5493 ring->rx_pending = port->rx_ring_size; 5494 ring->tx_pending = port->tx_ring_size; 5495 } 5496 5497 static int 5498 mvpp2_ethtool_set_ringparam(struct net_device *dev, 5499 struct ethtool_ringparam *ring, 5500 struct kernel_ethtool_ringparam *kernel_ring, 5501 struct netlink_ext_ack *extack) 5502 { 5503 struct mvpp2_port *port = netdev_priv(dev); 5504 u16 prev_rx_ring_size = port->rx_ring_size; 5505 u16 prev_tx_ring_size = port->tx_ring_size; 5506 int err; 5507 5508 err = mvpp2_check_ringparam_valid(dev, ring); 5509 if (err) 5510 return err; 5511 5512 if (!netif_running(dev)) { 5513 port->rx_ring_size = ring->rx_pending; 5514 port->tx_ring_size = ring->tx_pending; 5515 return 0; 5516 } 5517 5518 /* The interface is running, so we have to force a 5519 * reallocation of the queues 5520 */ 5521 mvpp2_stop_dev(port); 5522 mvpp2_cleanup_rxqs(port); 5523 mvpp2_cleanup_txqs(port); 5524 5525 port->rx_ring_size = ring->rx_pending; 5526 port->tx_ring_size = ring->tx_pending; 5527 5528 err = mvpp2_setup_rxqs(port); 5529 if (err) { 5530 /* Reallocate Rx queues with the original ring size */ 5531 port->rx_ring_size = prev_rx_ring_size; 5532 ring->rx_pending = prev_rx_ring_size; 5533 err = mvpp2_setup_rxqs(port); 5534 if (err) 5535 goto err_out; 5536 } 5537 err = mvpp2_setup_txqs(port); 5538 if (err) { 5539 /* Reallocate Tx queues with the original ring size */ 5540 port->tx_ring_size = prev_tx_ring_size; 5541 ring->tx_pending = prev_tx_ring_size; 5542 err = mvpp2_setup_txqs(port); 5543 if (err) 5544 goto err_clean_rxqs; 5545 } 5546 5547 mvpp2_start_dev(port); 5548 mvpp2_egress_enable(port); 5549 mvpp2_ingress_enable(port); 5550 5551 return 0; 5552 5553 err_clean_rxqs: 5554 mvpp2_cleanup_rxqs(port); 5555 err_out: 5556 netdev_err(dev, "failed to change ring parameters"); 5557 return err; 5558 } 5559 5560 static void mvpp2_ethtool_get_pause_param(struct net_device *dev, 5561 struct ethtool_pauseparam *pause) 5562 { 5563 struct mvpp2_port *port = netdev_priv(dev); 5564 5565 if (!port->phylink) 5566 return; 5567 5568 phylink_ethtool_get_pauseparam(port->phylink, pause); 5569 } 5570 5571 static int mvpp2_ethtool_set_pause_param(struct net_device *dev, 5572 struct ethtool_pauseparam *pause) 5573 { 5574 struct mvpp2_port *port = netdev_priv(dev); 5575 5576 if (!port->phylink) 5577 return -ENOTSUPP; 5578 5579 return phylink_ethtool_set_pauseparam(port->phylink, pause); 5580 } 5581 5582 static int mvpp2_ethtool_get_link_ksettings(struct net_device *dev, 5583 struct ethtool_link_ksettings *cmd) 5584 { 5585 struct mvpp2_port *port = netdev_priv(dev); 5586 5587 if (!port->phylink) 5588 return -ENOTSUPP; 5589 5590 return phylink_ethtool_ksettings_get(port->phylink, cmd); 5591 } 5592 5593 static int mvpp2_ethtool_set_link_ksettings(struct net_device *dev, 5594 const struct ethtool_link_ksettings *cmd) 5595 { 5596 struct mvpp2_port *port = netdev_priv(dev); 5597 5598 if (!port->phylink) 5599 return -ENOTSUPP; 5600 5601 return phylink_ethtool_ksettings_set(port->phylink, cmd); 5602 } 5603 5604 static int mvpp2_ethtool_get_rxnfc(struct net_device *dev, 5605 struct ethtool_rxnfc *info, u32 *rules) 5606 { 5607 struct mvpp2_port *port = netdev_priv(dev); 5608 int ret = 0, i, loc = 0; 5609 5610 if (!mvpp22_rss_is_supported(port)) 5611 return -EOPNOTSUPP; 5612 5613 switch (info->cmd) { 5614 case ETHTOOL_GRXFH: 5615 ret = mvpp2_ethtool_rxfh_get(port, info); 5616 break; 5617 case ETHTOOL_GRXRINGS: 5618 info->data = port->nrxqs; 5619 break; 5620 case ETHTOOL_GRXCLSRLCNT: 5621 info->rule_cnt = port->n_rfs_rules; 5622 break; 5623 case ETHTOOL_GRXCLSRULE: 5624 ret = mvpp2_ethtool_cls_rule_get(port, info); 5625 break; 5626 case ETHTOOL_GRXCLSRLALL: 5627 for (i = 0; i < MVPP2_N_RFS_ENTRIES_PER_FLOW; i++) { 5628 if (loc == info->rule_cnt) { 5629 ret = -EMSGSIZE; 5630 break; 5631 } 5632 5633 if (port->rfs_rules[i]) 5634 rules[loc++] = i; 5635 } 5636 break; 5637 default: 5638 return -ENOTSUPP; 5639 } 5640 5641 return ret; 5642 } 5643 5644 static int mvpp2_ethtool_set_rxnfc(struct net_device *dev, 5645 struct ethtool_rxnfc *info) 5646 { 5647 struct mvpp2_port *port = netdev_priv(dev); 5648 int ret = 0; 5649 5650 if (!mvpp22_rss_is_supported(port)) 5651 return -EOPNOTSUPP; 5652 5653 switch (info->cmd) { 5654 case ETHTOOL_SRXFH: 5655 ret = mvpp2_ethtool_rxfh_set(port, info); 5656 break; 5657 case ETHTOOL_SRXCLSRLINS: 5658 ret = mvpp2_ethtool_cls_rule_ins(port, info); 5659 break; 5660 case ETHTOOL_SRXCLSRLDEL: 5661 ret = mvpp2_ethtool_cls_rule_del(port, info); 5662 break; 5663 default: 5664 return -EOPNOTSUPP; 5665 } 5666 return ret; 5667 } 5668 5669 static u32 mvpp2_ethtool_get_rxfh_indir_size(struct net_device *dev) 5670 { 5671 struct mvpp2_port *port = netdev_priv(dev); 5672 5673 return mvpp22_rss_is_supported(port) ? MVPP22_RSS_TABLE_ENTRIES : 0; 5674 } 5675 5676 static int mvpp2_ethtool_get_rxfh(struct net_device *dev, 5677 struct ethtool_rxfh_param *rxfh) 5678 { 5679 struct mvpp2_port *port = netdev_priv(dev); 5680 u32 rss_context = rxfh->rss_context; 5681 int ret = 0; 5682 5683 if (!mvpp22_rss_is_supported(port)) 5684 return -EOPNOTSUPP; 5685 if (rss_context >= MVPP22_N_RSS_TABLES) 5686 return -EINVAL; 5687 5688 rxfh->hfunc = ETH_RSS_HASH_CRC32; 5689 5690 if (rxfh->indir) 5691 ret = mvpp22_port_rss_ctx_indir_get(port, rss_context, 5692 rxfh->indir); 5693 5694 return ret; 5695 } 5696 5697 static bool mvpp2_ethtool_rxfh_okay(struct mvpp2_port *port, 5698 const struct ethtool_rxfh_param *rxfh) 5699 { 5700 if (!mvpp22_rss_is_supported(port)) 5701 return false; 5702 5703 if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE && 5704 rxfh->hfunc != ETH_RSS_HASH_CRC32) 5705 return false; 5706 5707 if (rxfh->key) 5708 return false; 5709 5710 return true; 5711 } 5712 5713 static int mvpp2_create_rxfh_context(struct net_device *dev, 5714 struct ethtool_rxfh_context *ctx, 5715 const struct ethtool_rxfh_param *rxfh, 5716 struct netlink_ext_ack *extack) 5717 { 5718 struct mvpp2_port *port = netdev_priv(dev); 5719 int ret = 0; 5720 5721 if (!mvpp2_ethtool_rxfh_okay(port, rxfh)) 5722 return -EOPNOTSUPP; 5723 5724 ctx->hfunc = ETH_RSS_HASH_CRC32; 5725 5726 ret = mvpp22_port_rss_ctx_create(port, rxfh->rss_context); 5727 if (ret) 5728 return ret; 5729 5730 if (!rxfh->indir) 5731 ret = mvpp22_port_rss_ctx_indir_get(port, rxfh->rss_context, 5732 ethtool_rxfh_context_indir(ctx)); 5733 else 5734 ret = mvpp22_port_rss_ctx_indir_set(port, rxfh->rss_context, 5735 rxfh->indir); 5736 return ret; 5737 } 5738 5739 static int mvpp2_modify_rxfh_context(struct net_device *dev, 5740 struct ethtool_rxfh_context *ctx, 5741 const struct ethtool_rxfh_param *rxfh, 5742 struct netlink_ext_ack *extack) 5743 { 5744 struct mvpp2_port *port = netdev_priv(dev); 5745 int ret = 0; 5746 5747 if (!mvpp2_ethtool_rxfh_okay(port, rxfh)) 5748 return -EOPNOTSUPP; 5749 5750 if (rxfh->indir) 5751 ret = mvpp22_port_rss_ctx_indir_set(port, rxfh->rss_context, 5752 rxfh->indir); 5753 return ret; 5754 } 5755 5756 static int mvpp2_remove_rxfh_context(struct net_device *dev, 5757 struct ethtool_rxfh_context *ctx, 5758 u32 rss_context, 5759 struct netlink_ext_ack *extack) 5760 { 5761 struct mvpp2_port *port = netdev_priv(dev); 5762 5763 return mvpp22_port_rss_ctx_delete(port, rss_context); 5764 } 5765 5766 static int mvpp2_ethtool_set_rxfh(struct net_device *dev, 5767 struct ethtool_rxfh_param *rxfh, 5768 struct netlink_ext_ack *extack) 5769 { 5770 return mvpp2_modify_rxfh_context(dev, NULL, rxfh, extack); 5771 } 5772 5773 /* Device ops */ 5774 5775 static const struct net_device_ops mvpp2_netdev_ops = { 5776 .ndo_open = mvpp2_open, 5777 .ndo_stop = mvpp2_stop, 5778 .ndo_start_xmit = mvpp2_tx, 5779 .ndo_set_rx_mode = mvpp2_set_rx_mode, 5780 .ndo_set_mac_address = mvpp2_set_mac_address, 5781 .ndo_change_mtu = mvpp2_change_mtu, 5782 .ndo_get_stats64 = mvpp2_get_stats64, 5783 .ndo_eth_ioctl = mvpp2_ioctl, 5784 .ndo_vlan_rx_add_vid = mvpp2_vlan_rx_add_vid, 5785 .ndo_vlan_rx_kill_vid = mvpp2_vlan_rx_kill_vid, 5786 .ndo_set_features = mvpp2_set_features, 5787 .ndo_bpf = mvpp2_xdp, 5788 .ndo_xdp_xmit = mvpp2_xdp_xmit, 5789 }; 5790 5791 static const struct ethtool_ops mvpp2_eth_tool_ops = { 5792 .rxfh_max_num_contexts = MVPP22_N_RSS_TABLES, 5793 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 5794 ETHTOOL_COALESCE_MAX_FRAMES, 5795 .nway_reset = mvpp2_ethtool_nway_reset, 5796 .get_link = ethtool_op_get_link, 5797 .get_ts_info = mvpp2_ethtool_get_ts_info, 5798 .set_coalesce = mvpp2_ethtool_set_coalesce, 5799 .get_coalesce = mvpp2_ethtool_get_coalesce, 5800 .get_drvinfo = mvpp2_ethtool_get_drvinfo, 5801 .get_ringparam = mvpp2_ethtool_get_ringparam, 5802 .set_ringparam = mvpp2_ethtool_set_ringparam, 5803 .get_strings = mvpp2_ethtool_get_strings, 5804 .get_ethtool_stats = mvpp2_ethtool_get_stats, 5805 .get_sset_count = mvpp2_ethtool_get_sset_count, 5806 .get_pauseparam = mvpp2_ethtool_get_pause_param, 5807 .set_pauseparam = mvpp2_ethtool_set_pause_param, 5808 .get_link_ksettings = mvpp2_ethtool_get_link_ksettings, 5809 .set_link_ksettings = mvpp2_ethtool_set_link_ksettings, 5810 .get_rxnfc = mvpp2_ethtool_get_rxnfc, 5811 .set_rxnfc = mvpp2_ethtool_set_rxnfc, 5812 .get_rxfh_indir_size = mvpp2_ethtool_get_rxfh_indir_size, 5813 .get_rxfh = mvpp2_ethtool_get_rxfh, 5814 .set_rxfh = mvpp2_ethtool_set_rxfh, 5815 .create_rxfh_context = mvpp2_create_rxfh_context, 5816 .modify_rxfh_context = mvpp2_modify_rxfh_context, 5817 .remove_rxfh_context = mvpp2_remove_rxfh_context, 5818 }; 5819 5820 /* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that 5821 * had a single IRQ defined per-port. 5822 */ 5823 static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port, 5824 struct device_node *port_node) 5825 { 5826 struct mvpp2_queue_vector *v = &port->qvecs[0]; 5827 5828 v->first_rxq = 0; 5829 v->nrxqs = port->nrxqs; 5830 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5831 v->sw_thread_id = 0; 5832 v->sw_thread_mask = *cpumask_bits(cpu_online_mask); 5833 v->port = port; 5834 v->irq = irq_of_parse_and_map(port_node, 0); 5835 if (v->irq <= 0) 5836 return -EINVAL; 5837 netif_napi_add(port->dev, &v->napi, mvpp2_poll); 5838 5839 port->nqvecs = 1; 5840 5841 return 0; 5842 } 5843 5844 static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port, 5845 struct device_node *port_node) 5846 { 5847 struct mvpp2 *priv = port->priv; 5848 struct mvpp2_queue_vector *v; 5849 int i, ret; 5850 5851 switch (queue_mode) { 5852 case MVPP2_QDIST_SINGLE_MODE: 5853 port->nqvecs = priv->nthreads + 1; 5854 break; 5855 case MVPP2_QDIST_MULTI_MODE: 5856 port->nqvecs = priv->nthreads; 5857 break; 5858 } 5859 5860 for (i = 0; i < port->nqvecs; i++) { 5861 char irqname[16]; 5862 5863 v = port->qvecs + i; 5864 5865 v->port = port; 5866 v->type = MVPP2_QUEUE_VECTOR_PRIVATE; 5867 v->sw_thread_id = i; 5868 v->sw_thread_mask = BIT(i); 5869 5870 if (port->flags & MVPP2_F_DT_COMPAT) 5871 snprintf(irqname, sizeof(irqname), "tx-cpu%d", i); 5872 else 5873 snprintf(irqname, sizeof(irqname), "hif%d", i); 5874 5875 if (queue_mode == MVPP2_QDIST_MULTI_MODE) { 5876 v->first_rxq = i; 5877 v->nrxqs = 1; 5878 } else if (queue_mode == MVPP2_QDIST_SINGLE_MODE && 5879 i == (port->nqvecs - 1)) { 5880 v->first_rxq = 0; 5881 v->nrxqs = port->nrxqs; 5882 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5883 5884 if (port->flags & MVPP2_F_DT_COMPAT) 5885 strscpy(irqname, "rx-shared", sizeof(irqname)); 5886 } 5887 5888 if (port_node) 5889 v->irq = of_irq_get_byname(port_node, irqname); 5890 else 5891 v->irq = fwnode_irq_get(port->fwnode, i); 5892 if (v->irq <= 0) { 5893 ret = -EINVAL; 5894 goto err; 5895 } 5896 5897 netif_napi_add(port->dev, &v->napi, mvpp2_poll); 5898 } 5899 5900 return 0; 5901 5902 err: 5903 for (i = 0; i < port->nqvecs; i++) 5904 irq_dispose_mapping(port->qvecs[i].irq); 5905 return ret; 5906 } 5907 5908 static int mvpp2_queue_vectors_init(struct mvpp2_port *port, 5909 struct device_node *port_node) 5910 { 5911 if (port->has_tx_irqs) 5912 return mvpp2_multi_queue_vectors_init(port, port_node); 5913 else 5914 return mvpp2_simple_queue_vectors_init(port, port_node); 5915 } 5916 5917 static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port) 5918 { 5919 int i; 5920 5921 for (i = 0; i < port->nqvecs; i++) 5922 irq_dispose_mapping(port->qvecs[i].irq); 5923 } 5924 5925 /* Configure Rx queue group interrupt for this port */ 5926 static void mvpp2_rx_irqs_setup(struct mvpp2_port *port) 5927 { 5928 struct mvpp2 *priv = port->priv; 5929 u32 val; 5930 int i; 5931 5932 if (priv->hw_version == MVPP21) { 5933 mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id), 5934 port->nrxqs); 5935 return; 5936 } 5937 5938 /* Handle the more complicated PPv2.2 and PPv2.3 case */ 5939 for (i = 0; i < port->nqvecs; i++) { 5940 struct mvpp2_queue_vector *qv = port->qvecs + i; 5941 5942 if (!qv->nrxqs) 5943 continue; 5944 5945 val = qv->sw_thread_id; 5946 val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET; 5947 mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val); 5948 5949 val = qv->first_rxq; 5950 val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET; 5951 mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val); 5952 } 5953 } 5954 5955 /* Initialize port HW */ 5956 static int mvpp2_port_init(struct mvpp2_port *port) 5957 { 5958 struct device *dev = port->dev->dev.parent; 5959 struct mvpp2 *priv = port->priv; 5960 struct mvpp2_txq_pcpu *txq_pcpu; 5961 unsigned int thread; 5962 int queue, err, val; 5963 5964 /* Checks for hardware constraints */ 5965 if (port->first_rxq + port->nrxqs > 5966 MVPP2_MAX_PORTS * priv->max_port_rxqs) 5967 return -EINVAL; 5968 5969 if (port->nrxqs > priv->max_port_rxqs || port->ntxqs > MVPP2_MAX_TXQ) 5970 return -EINVAL; 5971 5972 /* Disable port */ 5973 mvpp2_egress_disable(port); 5974 mvpp2_port_disable(port); 5975 5976 if (mvpp2_is_xlg(port->phy_interface)) { 5977 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 5978 val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 5979 val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN; 5980 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 5981 } else { 5982 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5983 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 5984 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 5985 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5986 } 5987 5988 port->tx_time_coal = MVPP2_TXDONE_COAL_USEC; 5989 5990 port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs), 5991 GFP_KERNEL); 5992 if (!port->txqs) 5993 return -ENOMEM; 5994 5995 /* Associate physical Tx queues to this port and initialize. 5996 * The mapping is predefined. 5997 */ 5998 for (queue = 0; queue < port->ntxqs; queue++) { 5999 int queue_phy_id = mvpp2_txq_phys(port->id, queue); 6000 struct mvpp2_tx_queue *txq; 6001 6002 txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL); 6003 if (!txq) { 6004 err = -ENOMEM; 6005 goto err_free_percpu; 6006 } 6007 6008 txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu); 6009 if (!txq->pcpu) { 6010 err = -ENOMEM; 6011 goto err_free_percpu; 6012 } 6013 6014 txq->id = queue_phy_id; 6015 txq->log_id = queue; 6016 txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH; 6017 for (thread = 0; thread < priv->nthreads; thread++) { 6018 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 6019 txq_pcpu->thread = thread; 6020 } 6021 6022 port->txqs[queue] = txq; 6023 } 6024 6025 port->rxqs = devm_kcalloc(dev, port->nrxqs, sizeof(*port->rxqs), 6026 GFP_KERNEL); 6027 if (!port->rxqs) { 6028 err = -ENOMEM; 6029 goto err_free_percpu; 6030 } 6031 6032 /* Allocate and initialize Rx queue for this port */ 6033 for (queue = 0; queue < port->nrxqs; queue++) { 6034 struct mvpp2_rx_queue *rxq; 6035 6036 /* Map physical Rx queue to port's logical Rx queue */ 6037 rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL); 6038 if (!rxq) { 6039 err = -ENOMEM; 6040 goto err_free_percpu; 6041 } 6042 /* Map this Rx queue to a physical queue */ 6043 rxq->id = port->first_rxq + queue; 6044 rxq->port = port->id; 6045 rxq->logic_rxq = queue; 6046 6047 port->rxqs[queue] = rxq; 6048 } 6049 6050 mvpp2_rx_irqs_setup(port); 6051 6052 /* Create Rx descriptor rings */ 6053 for (queue = 0; queue < port->nrxqs; queue++) { 6054 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 6055 6056 rxq->size = port->rx_ring_size; 6057 rxq->pkts_coal = MVPP2_RX_COAL_PKTS; 6058 rxq->time_coal = MVPP2_RX_COAL_USEC; 6059 } 6060 6061 mvpp2_ingress_disable(port); 6062 6063 /* Port default configuration */ 6064 mvpp2_defaults_set(port); 6065 6066 /* Port's classifier configuration */ 6067 mvpp2_cls_oversize_rxq_set(port); 6068 mvpp2_cls_port_config(port); 6069 6070 if (mvpp22_rss_is_supported(port)) 6071 mvpp22_port_rss_init(port); 6072 6073 /* Provide an initial Rx packet size */ 6074 port->pkt_size = MVPP2_RX_PKT_SIZE(port->dev->mtu); 6075 6076 /* Initialize pools for swf */ 6077 err = mvpp2_swf_bm_pool_init(port); 6078 if (err) 6079 goto err_free_percpu; 6080 6081 /* Clear all port stats */ 6082 mvpp2_read_stats(port); 6083 memset(port->ethtool_stats, 0, 6084 MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs) * sizeof(u64)); 6085 6086 return 0; 6087 6088 err_free_percpu: 6089 for (queue = 0; queue < port->ntxqs; queue++) { 6090 if (!port->txqs[queue]) 6091 continue; 6092 free_percpu(port->txqs[queue]->pcpu); 6093 } 6094 return err; 6095 } 6096 6097 static bool mvpp22_port_has_legacy_tx_irqs(struct device_node *port_node, 6098 unsigned long *flags) 6099 { 6100 char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1", "tx-cpu2", 6101 "tx-cpu3" }; 6102 int i; 6103 6104 for (i = 0; i < 5; i++) 6105 if (of_property_match_string(port_node, "interrupt-names", 6106 irqs[i]) < 0) 6107 return false; 6108 6109 *flags |= MVPP2_F_DT_COMPAT; 6110 return true; 6111 } 6112 6113 /* Checks if the port dt description has the required Tx interrupts: 6114 * - PPv2.1: there are no such interrupts. 6115 * - PPv2.2 and PPv2.3: 6116 * - The old DTs have: "rx-shared", "tx-cpuX" with X in [0...3] 6117 * - The new ones have: "hifX" with X in [0..8] 6118 * 6119 * All those variants are supported to keep the backward compatibility. 6120 */ 6121 static bool mvpp2_port_has_irqs(struct mvpp2 *priv, 6122 struct device_node *port_node, 6123 unsigned long *flags) 6124 { 6125 char name[5]; 6126 int i; 6127 6128 /* ACPI */ 6129 if (!port_node) 6130 return true; 6131 6132 if (priv->hw_version == MVPP21) 6133 return false; 6134 6135 if (mvpp22_port_has_legacy_tx_irqs(port_node, flags)) 6136 return true; 6137 6138 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 6139 snprintf(name, 5, "hif%d", i); 6140 if (of_property_match_string(port_node, "interrupt-names", 6141 name) < 0) 6142 return false; 6143 } 6144 6145 return true; 6146 } 6147 6148 static int mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv, 6149 struct fwnode_handle *fwnode, 6150 char **mac_from) 6151 { 6152 struct mvpp2_port *port = netdev_priv(dev); 6153 char hw_mac_addr[ETH_ALEN] = {0}; 6154 char fw_mac_addr[ETH_ALEN]; 6155 int ret; 6156 6157 if (!fwnode_get_mac_address(fwnode, fw_mac_addr)) { 6158 *mac_from = "firmware node"; 6159 eth_hw_addr_set(dev, fw_mac_addr); 6160 return 0; 6161 } 6162 6163 if (priv->hw_version == MVPP21) { 6164 mvpp21_get_mac_address(port, hw_mac_addr); 6165 if (is_valid_ether_addr(hw_mac_addr)) { 6166 *mac_from = "hardware"; 6167 eth_hw_addr_set(dev, hw_mac_addr); 6168 return 0; 6169 } 6170 } 6171 6172 /* Only valid on OF enabled platforms */ 6173 ret = of_get_mac_address_nvmem(to_of_node(fwnode), fw_mac_addr); 6174 if (ret == -EPROBE_DEFER) 6175 return ret; 6176 if (!ret) { 6177 *mac_from = "nvmem cell"; 6178 eth_hw_addr_set(dev, fw_mac_addr); 6179 return 0; 6180 } 6181 6182 *mac_from = "random"; 6183 eth_hw_addr_random(dev); 6184 6185 return 0; 6186 } 6187 6188 static struct mvpp2_port *mvpp2_phylink_to_port(struct phylink_config *config) 6189 { 6190 return container_of(config, struct mvpp2_port, phylink_config); 6191 } 6192 6193 static struct mvpp2_port *mvpp2_pcs_xlg_to_port(struct phylink_pcs *pcs) 6194 { 6195 return container_of(pcs, struct mvpp2_port, pcs_xlg); 6196 } 6197 6198 static struct mvpp2_port *mvpp2_pcs_gmac_to_port(struct phylink_pcs *pcs) 6199 { 6200 return container_of(pcs, struct mvpp2_port, pcs_gmac); 6201 } 6202 6203 static void mvpp2_xlg_pcs_get_state(struct phylink_pcs *pcs, 6204 struct phylink_link_state *state) 6205 { 6206 struct mvpp2_port *port = mvpp2_pcs_xlg_to_port(pcs); 6207 u32 val; 6208 6209 if (port->phy_interface == PHY_INTERFACE_MODE_5GBASER) 6210 state->speed = SPEED_5000; 6211 else 6212 state->speed = SPEED_10000; 6213 state->duplex = 1; 6214 state->an_complete = 1; 6215 6216 val = readl(port->base + MVPP22_XLG_STATUS); 6217 state->link = !!(val & MVPP22_XLG_STATUS_LINK_UP); 6218 6219 state->pause = 0; 6220 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6221 if (val & MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN) 6222 state->pause |= MLO_PAUSE_TX; 6223 if (val & MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN) 6224 state->pause |= MLO_PAUSE_RX; 6225 } 6226 6227 static int mvpp2_xlg_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 6228 phy_interface_t interface, 6229 const unsigned long *advertising, 6230 bool permit_pause_to_mac) 6231 { 6232 return 0; 6233 } 6234 6235 static const struct phylink_pcs_ops mvpp2_phylink_xlg_pcs_ops = { 6236 .pcs_get_state = mvpp2_xlg_pcs_get_state, 6237 .pcs_config = mvpp2_xlg_pcs_config, 6238 }; 6239 6240 static int mvpp2_gmac_pcs_validate(struct phylink_pcs *pcs, 6241 unsigned long *supported, 6242 const struct phylink_link_state *state) 6243 { 6244 /* When in 802.3z mode, we must have AN enabled: 6245 * Bit 2 Field InBandAnEn In-band Auto-Negotiation enable. ... 6246 * When <PortType> = 1 (1000BASE-X) this field must be set to 1. 6247 */ 6248 if (phy_interface_mode_is_8023z(state->interface) && 6249 !phylink_test(state->advertising, Autoneg)) 6250 return -EINVAL; 6251 6252 return 0; 6253 } 6254 6255 static void mvpp2_gmac_pcs_get_state(struct phylink_pcs *pcs, 6256 struct phylink_link_state *state) 6257 { 6258 struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs); 6259 u32 val; 6260 6261 val = readl(port->base + MVPP2_GMAC_STATUS0); 6262 6263 state->an_complete = !!(val & MVPP2_GMAC_STATUS0_AN_COMPLETE); 6264 state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP); 6265 state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX); 6266 6267 switch (port->phy_interface) { 6268 case PHY_INTERFACE_MODE_1000BASEX: 6269 state->speed = SPEED_1000; 6270 break; 6271 case PHY_INTERFACE_MODE_2500BASEX: 6272 state->speed = SPEED_2500; 6273 break; 6274 default: 6275 if (val & MVPP2_GMAC_STATUS0_GMII_SPEED) 6276 state->speed = SPEED_1000; 6277 else if (val & MVPP2_GMAC_STATUS0_MII_SPEED) 6278 state->speed = SPEED_100; 6279 else 6280 state->speed = SPEED_10; 6281 } 6282 6283 state->pause = 0; 6284 if (val & MVPP2_GMAC_STATUS0_RX_PAUSE) 6285 state->pause |= MLO_PAUSE_RX; 6286 if (val & MVPP2_GMAC_STATUS0_TX_PAUSE) 6287 state->pause |= MLO_PAUSE_TX; 6288 } 6289 6290 static int mvpp2_gmac_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, 6291 phy_interface_t interface, 6292 const unsigned long *advertising, 6293 bool permit_pause_to_mac) 6294 { 6295 struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs); 6296 u32 mask, val, an, old_an, changed; 6297 6298 mask = MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS | 6299 MVPP2_GMAC_IN_BAND_AUTONEG | 6300 MVPP2_GMAC_AN_SPEED_EN | 6301 MVPP2_GMAC_FLOW_CTRL_AUTONEG | 6302 MVPP2_GMAC_AN_DUPLEX_EN; 6303 6304 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) { 6305 mask |= MVPP2_GMAC_CONFIG_MII_SPEED | 6306 MVPP2_GMAC_CONFIG_GMII_SPEED | 6307 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6308 val = MVPP2_GMAC_IN_BAND_AUTONEG; 6309 6310 if (interface == PHY_INTERFACE_MODE_SGMII) { 6311 /* SGMII mode receives the speed and duplex from PHY */ 6312 val |= MVPP2_GMAC_AN_SPEED_EN | 6313 MVPP2_GMAC_AN_DUPLEX_EN; 6314 } else { 6315 /* 802.3z mode has fixed speed and duplex */ 6316 val |= MVPP2_GMAC_CONFIG_GMII_SPEED | 6317 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6318 6319 /* The FLOW_CTRL_AUTONEG bit selects either the hardware 6320 * automatically or the bits in MVPP22_GMAC_CTRL_4_REG 6321 * manually controls the GMAC pause modes. 6322 */ 6323 if (permit_pause_to_mac) 6324 val |= MVPP2_GMAC_FLOW_CTRL_AUTONEG; 6325 6326 /* Configure advertisement bits */ 6327 mask |= MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN; 6328 if (phylink_test(advertising, Pause)) 6329 val |= MVPP2_GMAC_FC_ADV_EN; 6330 if (phylink_test(advertising, Asym_Pause)) 6331 val |= MVPP2_GMAC_FC_ADV_ASM_EN; 6332 } 6333 } else { 6334 val = 0; 6335 } 6336 6337 old_an = an = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6338 an = (an & ~mask) | val; 6339 changed = an ^ old_an; 6340 if (changed) 6341 writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6342 6343 /* We are only interested in the advertisement bits changing */ 6344 return changed & (MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN); 6345 } 6346 6347 static void mvpp2_gmac_pcs_an_restart(struct phylink_pcs *pcs) 6348 { 6349 struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs); 6350 u32 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6351 6352 writel(val | MVPP2_GMAC_IN_BAND_RESTART_AN, 6353 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6354 writel(val & ~MVPP2_GMAC_IN_BAND_RESTART_AN, 6355 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6356 } 6357 6358 static const struct phylink_pcs_ops mvpp2_phylink_gmac_pcs_ops = { 6359 .pcs_validate = mvpp2_gmac_pcs_validate, 6360 .pcs_get_state = mvpp2_gmac_pcs_get_state, 6361 .pcs_config = mvpp2_gmac_pcs_config, 6362 .pcs_an_restart = mvpp2_gmac_pcs_an_restart, 6363 }; 6364 6365 static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, 6366 const struct phylink_link_state *state) 6367 { 6368 u32 val; 6369 6370 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6371 MVPP22_XLG_CTRL0_MAC_RESET_DIS, 6372 MVPP22_XLG_CTRL0_MAC_RESET_DIS); 6373 mvpp2_modify(port->base + MVPP22_XLG_CTRL4_REG, 6374 MVPP22_XLG_CTRL4_MACMODSELECT_GMAC | 6375 MVPP22_XLG_CTRL4_EN_IDLE_CHECK | 6376 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC, 6377 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC); 6378 6379 /* Wait for reset to deassert */ 6380 do { 6381 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6382 } while (!(val & MVPP22_XLG_CTRL0_MAC_RESET_DIS)); 6383 } 6384 6385 static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode, 6386 const struct phylink_link_state *state) 6387 { 6388 u32 old_ctrl0, ctrl0; 6389 u32 old_ctrl2, ctrl2; 6390 u32 old_ctrl4, ctrl4; 6391 6392 old_ctrl0 = ctrl0 = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 6393 old_ctrl2 = ctrl2 = readl(port->base + MVPP2_GMAC_CTRL_2_REG); 6394 old_ctrl4 = ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG); 6395 6396 ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK; 6397 ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_FLOW_CTRL_MASK); 6398 6399 /* Configure port type */ 6400 if (phy_interface_mode_is_8023z(state->interface)) { 6401 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK; 6402 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 6403 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 6404 MVPP22_CTRL4_DP_CLK_SEL | 6405 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6406 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 6407 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_INBAND_AN_MASK; 6408 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 6409 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 6410 MVPP22_CTRL4_DP_CLK_SEL | 6411 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6412 } else if (phy_interface_mode_is_rgmii(state->interface)) { 6413 ctrl4 &= ~MVPP22_CTRL4_DP_CLK_SEL; 6414 ctrl4 |= MVPP22_CTRL4_EXT_PIN_GMII_SEL | 6415 MVPP22_CTRL4_SYNC_BYPASS_DIS | 6416 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 6417 } 6418 6419 /* Configure negotiation style */ 6420 if (!phylink_autoneg_inband(mode)) { 6421 /* Phy or fixed speed - no in-band AN, nothing to do, leave the 6422 * configured speed, duplex and flow control as-is. 6423 */ 6424 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 6425 /* SGMII in-band mode receives the speed and duplex from 6426 * the PHY. Flow control information is not received. */ 6427 } else if (phy_interface_mode_is_8023z(state->interface)) { 6428 /* 1000BaseX and 2500BaseX ports cannot negotiate speed nor can 6429 * they negotiate duplex: they are always operating with a fixed 6430 * speed of 1000/2500Mbps in full duplex, so force 1000/2500 6431 * speed and full duplex here. 6432 */ 6433 ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK; 6434 } 6435 6436 if (old_ctrl0 != ctrl0) 6437 writel(ctrl0, port->base + MVPP2_GMAC_CTRL_0_REG); 6438 if (old_ctrl2 != ctrl2) 6439 writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 6440 if (old_ctrl4 != ctrl4) 6441 writel(ctrl4, port->base + MVPP22_GMAC_CTRL_4_REG); 6442 } 6443 6444 static struct phylink_pcs *mvpp2_select_pcs(struct phylink_config *config, 6445 phy_interface_t interface) 6446 { 6447 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6448 6449 /* Select the appropriate PCS operations depending on the 6450 * configured interface mode. We will only switch to a mode 6451 * that the validate() checks have already passed. 6452 */ 6453 if (mvpp2_is_xlg(interface)) 6454 return &port->pcs_xlg; 6455 else 6456 return &port->pcs_gmac; 6457 } 6458 6459 static int mvpp2_mac_prepare(struct phylink_config *config, unsigned int mode, 6460 phy_interface_t interface) 6461 { 6462 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6463 6464 /* Check for invalid configuration */ 6465 if (mvpp2_is_xlg(interface) && port->gop_id != 0) { 6466 netdev_err(port->dev, "Invalid mode on %s\n", port->dev->name); 6467 return -EINVAL; 6468 } 6469 6470 if (port->phy_interface != interface || 6471 phylink_autoneg_inband(mode)) { 6472 /* Force the link down when changing the interface or if in 6473 * in-band mode to ensure we do not change the configuration 6474 * while the hardware is indicating link is up. We force both 6475 * XLG and GMAC down to ensure that they're both in a known 6476 * state. 6477 */ 6478 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6479 MVPP2_GMAC_FORCE_LINK_PASS | 6480 MVPP2_GMAC_FORCE_LINK_DOWN, 6481 MVPP2_GMAC_FORCE_LINK_DOWN); 6482 6483 if (mvpp2_port_supports_xlg(port)) 6484 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6485 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6486 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN, 6487 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN); 6488 } 6489 6490 /* Make sure the port is disabled when reconfiguring the mode */ 6491 mvpp2_port_disable(port); 6492 6493 if (port->phy_interface != interface) { 6494 /* Place GMAC into reset */ 6495 mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG, 6496 MVPP2_GMAC_PORT_RESET_MASK, 6497 MVPP2_GMAC_PORT_RESET_MASK); 6498 6499 if (port->priv->hw_version >= MVPP22) { 6500 mvpp22_gop_mask_irq(port); 6501 6502 phy_power_off(port->comphy); 6503 6504 /* Reconfigure the serdes lanes */ 6505 mvpp22_mode_reconfigure(port, interface); 6506 } 6507 } 6508 6509 return 0; 6510 } 6511 6512 static void mvpp2_mac_config(struct phylink_config *config, unsigned int mode, 6513 const struct phylink_link_state *state) 6514 { 6515 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6516 6517 /* mac (re)configuration */ 6518 if (mvpp2_is_xlg(state->interface)) 6519 mvpp2_xlg_config(port, mode, state); 6520 else if (phy_interface_mode_is_rgmii(state->interface) || 6521 phy_interface_mode_is_8023z(state->interface) || 6522 state->interface == PHY_INTERFACE_MODE_SGMII) 6523 mvpp2_gmac_config(port, mode, state); 6524 6525 if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK) 6526 mvpp2_port_loopback_set(port, state); 6527 } 6528 6529 static int mvpp2_mac_finish(struct phylink_config *config, unsigned int mode, 6530 phy_interface_t interface) 6531 { 6532 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6533 6534 if (port->priv->hw_version >= MVPP22 && 6535 port->phy_interface != interface) { 6536 port->phy_interface = interface; 6537 6538 /* Unmask interrupts */ 6539 mvpp22_gop_unmask_irq(port); 6540 } 6541 6542 if (!mvpp2_is_xlg(interface)) { 6543 /* Release GMAC reset and wait */ 6544 mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG, 6545 MVPP2_GMAC_PORT_RESET_MASK, 0); 6546 6547 while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) & 6548 MVPP2_GMAC_PORT_RESET_MASK) 6549 continue; 6550 } 6551 6552 mvpp2_port_enable(port); 6553 6554 /* Allow the link to come up if in in-band mode, otherwise the 6555 * link is forced via mac_link_down()/mac_link_up() 6556 */ 6557 if (phylink_autoneg_inband(mode)) { 6558 if (mvpp2_is_xlg(interface)) 6559 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6560 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6561 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN, 0); 6562 else 6563 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6564 MVPP2_GMAC_FORCE_LINK_PASS | 6565 MVPP2_GMAC_FORCE_LINK_DOWN, 0); 6566 } 6567 6568 return 0; 6569 } 6570 6571 static void mvpp2_mac_link_up(struct phylink_config *config, 6572 struct phy_device *phy, 6573 unsigned int mode, phy_interface_t interface, 6574 int speed, int duplex, 6575 bool tx_pause, bool rx_pause) 6576 { 6577 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6578 u32 val; 6579 int i; 6580 6581 if (mvpp2_is_xlg(interface)) { 6582 if (!phylink_autoneg_inband(mode)) { 6583 val = MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 6584 if (tx_pause) 6585 val |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN; 6586 if (rx_pause) 6587 val |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN; 6588 6589 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 6590 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN | 6591 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 6592 MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN | 6593 MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN, val); 6594 } 6595 } else { 6596 if (!phylink_autoneg_inband(mode)) { 6597 val = MVPP2_GMAC_FORCE_LINK_PASS; 6598 6599 if (speed == SPEED_1000 || speed == SPEED_2500) 6600 val |= MVPP2_GMAC_CONFIG_GMII_SPEED; 6601 else if (speed == SPEED_100) 6602 val |= MVPP2_GMAC_CONFIG_MII_SPEED; 6603 6604 if (duplex == DUPLEX_FULL) 6605 val |= MVPP2_GMAC_CONFIG_FULL_DUPLEX; 6606 6607 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 6608 MVPP2_GMAC_FORCE_LINK_DOWN | 6609 MVPP2_GMAC_FORCE_LINK_PASS | 6610 MVPP2_GMAC_CONFIG_MII_SPEED | 6611 MVPP2_GMAC_CONFIG_GMII_SPEED | 6612 MVPP2_GMAC_CONFIG_FULL_DUPLEX, val); 6613 } 6614 6615 /* We can always update the flow control enable bits; 6616 * these will only be effective if flow control AN 6617 * (MVPP2_GMAC_FLOW_CTRL_AUTONEG) is disabled. 6618 */ 6619 val = 0; 6620 if (tx_pause) 6621 val |= MVPP22_CTRL4_TX_FC_EN; 6622 if (rx_pause) 6623 val |= MVPP22_CTRL4_RX_FC_EN; 6624 6625 mvpp2_modify(port->base + MVPP22_GMAC_CTRL_4_REG, 6626 MVPP22_CTRL4_RX_FC_EN | MVPP22_CTRL4_TX_FC_EN, 6627 val); 6628 } 6629 6630 if (port->priv->global_tx_fc) { 6631 port->tx_fc = tx_pause; 6632 if (tx_pause) 6633 mvpp2_rxq_enable_fc(port); 6634 else 6635 mvpp2_rxq_disable_fc(port); 6636 if (port->priv->percpu_pools) { 6637 for (i = 0; i < port->nrxqs; i++) 6638 mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], tx_pause); 6639 } else { 6640 mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause); 6641 mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause); 6642 } 6643 if (port->priv->hw_version == MVPP23) 6644 mvpp23_rx_fifo_fc_en(port->priv, port->id, tx_pause); 6645 } 6646 6647 mvpp2_port_enable(port); 6648 6649 mvpp2_egress_enable(port); 6650 mvpp2_ingress_enable(port); 6651 netif_tx_wake_all_queues(port->dev); 6652 } 6653 6654 static void mvpp2_mac_link_down(struct phylink_config *config, 6655 unsigned int mode, phy_interface_t interface) 6656 { 6657 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 6658 u32 val; 6659 6660 if (!phylink_autoneg_inband(mode)) { 6661 if (mvpp2_is_xlg(interface)) { 6662 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 6663 val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 6664 val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN; 6665 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 6666 } else { 6667 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6668 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 6669 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 6670 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 6671 } 6672 } 6673 6674 netif_tx_stop_all_queues(port->dev); 6675 mvpp2_egress_disable(port); 6676 mvpp2_ingress_disable(port); 6677 6678 mvpp2_port_disable(port); 6679 } 6680 6681 static const struct phylink_mac_ops mvpp2_phylink_ops = { 6682 .mac_select_pcs = mvpp2_select_pcs, 6683 .mac_prepare = mvpp2_mac_prepare, 6684 .mac_config = mvpp2_mac_config, 6685 .mac_finish = mvpp2_mac_finish, 6686 .mac_link_up = mvpp2_mac_link_up, 6687 .mac_link_down = mvpp2_mac_link_down, 6688 }; 6689 6690 /* Work-around for ACPI */ 6691 static void mvpp2_acpi_start(struct mvpp2_port *port) 6692 { 6693 /* Phylink isn't used as of now for ACPI, so the MAC has to be 6694 * configured manually when the interface is started. This will 6695 * be removed as soon as the phylink ACPI support lands in. 6696 */ 6697 struct phylink_link_state state = { 6698 .interface = port->phy_interface, 6699 }; 6700 struct phylink_pcs *pcs; 6701 6702 pcs = mvpp2_select_pcs(&port->phylink_config, port->phy_interface); 6703 6704 mvpp2_mac_prepare(&port->phylink_config, MLO_AN_INBAND, 6705 port->phy_interface); 6706 mvpp2_mac_config(&port->phylink_config, MLO_AN_INBAND, &state); 6707 pcs->ops->pcs_config(pcs, PHYLINK_PCS_NEG_INBAND_ENABLED, 6708 port->phy_interface, state.advertising, 6709 false); 6710 mvpp2_mac_finish(&port->phylink_config, MLO_AN_INBAND, 6711 port->phy_interface); 6712 mvpp2_mac_link_up(&port->phylink_config, NULL, 6713 MLO_AN_INBAND, port->phy_interface, 6714 SPEED_UNKNOWN, DUPLEX_UNKNOWN, false, false); 6715 } 6716 6717 /* In order to ensure backward compatibility for ACPI, check if the port 6718 * firmware node comprises the necessary description allowing to use phylink. 6719 */ 6720 static bool mvpp2_use_acpi_compat_mode(struct fwnode_handle *port_fwnode) 6721 { 6722 if (!is_acpi_node(port_fwnode)) 6723 return false; 6724 6725 return (!fwnode_property_present(port_fwnode, "phy-handle") && 6726 !fwnode_property_present(port_fwnode, "managed") && 6727 !fwnode_get_named_child_node(port_fwnode, "fixed-link")); 6728 } 6729 6730 /* Ports initialization */ 6731 static int mvpp2_port_probe(struct platform_device *pdev, 6732 struct fwnode_handle *port_fwnode, 6733 struct mvpp2 *priv) 6734 { 6735 struct phy *comphy = NULL; 6736 struct mvpp2_port *port; 6737 struct mvpp2_port_pcpu *port_pcpu; 6738 struct device_node *port_node = to_of_node(port_fwnode); 6739 netdev_features_t features; 6740 struct net_device *dev; 6741 struct phylink *phylink; 6742 char *mac_from = ""; 6743 unsigned int ntxqs, nrxqs, thread; 6744 unsigned long flags = 0; 6745 bool has_tx_irqs; 6746 u32 id; 6747 int phy_mode; 6748 int err, i; 6749 6750 has_tx_irqs = mvpp2_port_has_irqs(priv, port_node, &flags); 6751 if (!has_tx_irqs && queue_mode == MVPP2_QDIST_MULTI_MODE) { 6752 dev_err(&pdev->dev, 6753 "not enough IRQs to support multi queue mode\n"); 6754 return -EINVAL; 6755 } 6756 6757 ntxqs = MVPP2_MAX_TXQ; 6758 nrxqs = mvpp2_get_nrxqs(priv); 6759 6760 dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs); 6761 if (!dev) 6762 return -ENOMEM; 6763 6764 phy_mode = fwnode_get_phy_mode(port_fwnode); 6765 if (phy_mode < 0) { 6766 dev_err(&pdev->dev, "incorrect phy mode\n"); 6767 err = phy_mode; 6768 goto err_free_netdev; 6769 } 6770 6771 /* 6772 * Rewrite 10GBASE-KR to 10GBASE-R for compatibility with existing DT. 6773 * Existing usage of 10GBASE-KR is not correct; no backplane 6774 * negotiation is done, and this driver does not actually support 6775 * 10GBASE-KR. 6776 */ 6777 if (phy_mode == PHY_INTERFACE_MODE_10GKR) 6778 phy_mode = PHY_INTERFACE_MODE_10GBASER; 6779 6780 if (port_node) { 6781 comphy = devm_of_phy_get(&pdev->dev, port_node, NULL); 6782 if (IS_ERR(comphy)) { 6783 if (PTR_ERR(comphy) == -EPROBE_DEFER) { 6784 err = -EPROBE_DEFER; 6785 goto err_free_netdev; 6786 } 6787 comphy = NULL; 6788 } 6789 } 6790 6791 if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) { 6792 err = -EINVAL; 6793 dev_err(&pdev->dev, "missing port-id value\n"); 6794 goto err_free_netdev; 6795 } 6796 6797 dev->tx_queue_len = MVPP2_MAX_TXD_MAX; 6798 dev->watchdog_timeo = 5 * HZ; 6799 dev->netdev_ops = &mvpp2_netdev_ops; 6800 dev->ethtool_ops = &mvpp2_eth_tool_ops; 6801 6802 port = netdev_priv(dev); 6803 port->dev = dev; 6804 port->fwnode = port_fwnode; 6805 port->ntxqs = ntxqs; 6806 port->nrxqs = nrxqs; 6807 port->priv = priv; 6808 port->has_tx_irqs = has_tx_irqs; 6809 port->flags = flags; 6810 6811 err = mvpp2_queue_vectors_init(port, port_node); 6812 if (err) 6813 goto err_free_netdev; 6814 6815 if (port_node) 6816 port->port_irq = of_irq_get_byname(port_node, "link"); 6817 else 6818 port->port_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1); 6819 if (port->port_irq == -EPROBE_DEFER) { 6820 err = -EPROBE_DEFER; 6821 goto err_deinit_qvecs; 6822 } 6823 if (port->port_irq <= 0) 6824 /* the link irq is optional */ 6825 port->port_irq = 0; 6826 6827 if (fwnode_property_read_bool(port_fwnode, "marvell,loopback")) 6828 port->flags |= MVPP2_F_LOOPBACK; 6829 6830 port->id = id; 6831 if (priv->hw_version == MVPP21) 6832 port->first_rxq = port->id * port->nrxqs; 6833 else 6834 port->first_rxq = port->id * priv->max_port_rxqs; 6835 6836 port->of_node = port_node; 6837 port->phy_interface = phy_mode; 6838 port->comphy = comphy; 6839 6840 if (priv->hw_version == MVPP21) { 6841 port->base = devm_platform_ioremap_resource(pdev, 2 + id); 6842 if (IS_ERR(port->base)) { 6843 err = PTR_ERR(port->base); 6844 goto err_free_irq; 6845 } 6846 6847 port->stats_base = port->priv->lms_base + 6848 MVPP21_MIB_COUNTERS_OFFSET + 6849 port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ; 6850 } else { 6851 if (fwnode_property_read_u32(port_fwnode, "gop-port-id", 6852 &port->gop_id)) { 6853 err = -EINVAL; 6854 dev_err(&pdev->dev, "missing gop-port-id value\n"); 6855 goto err_deinit_qvecs; 6856 } 6857 6858 port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id); 6859 port->stats_base = port->priv->iface_base + 6860 MVPP22_MIB_COUNTERS_OFFSET + 6861 port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ; 6862 6863 /* We may want a property to describe whether we should use 6864 * MAC hardware timestamping. 6865 */ 6866 if (priv->tai) 6867 port->hwtstamp = true; 6868 } 6869 6870 /* Alloc per-cpu and ethtool stats */ 6871 port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats); 6872 if (!port->stats) { 6873 err = -ENOMEM; 6874 goto err_free_irq; 6875 } 6876 6877 port->ethtool_stats = devm_kcalloc(&pdev->dev, 6878 MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs), 6879 sizeof(u64), GFP_KERNEL); 6880 if (!port->ethtool_stats) { 6881 err = -ENOMEM; 6882 goto err_free_stats; 6883 } 6884 6885 mutex_init(&port->gather_stats_lock); 6886 INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics); 6887 6888 err = mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from); 6889 if (err < 0) 6890 goto err_free_stats; 6891 6892 port->tx_ring_size = MVPP2_MAX_TXD_DFLT; 6893 port->rx_ring_size = MVPP2_MAX_RXD_DFLT; 6894 SET_NETDEV_DEV(dev, &pdev->dev); 6895 6896 err = mvpp2_port_init(port); 6897 if (err < 0) { 6898 dev_err(&pdev->dev, "failed to init port %d\n", id); 6899 goto err_free_stats; 6900 } 6901 6902 mvpp2_port_periodic_xon_disable(port); 6903 6904 mvpp2_mac_reset_assert(port); 6905 mvpp22_pcs_reset_assert(port); 6906 6907 port->pcpu = alloc_percpu(struct mvpp2_port_pcpu); 6908 if (!port->pcpu) { 6909 err = -ENOMEM; 6910 goto err_free_txq_pcpu; 6911 } 6912 6913 if (!port->has_tx_irqs) { 6914 for (thread = 0; thread < priv->nthreads; thread++) { 6915 port_pcpu = per_cpu_ptr(port->pcpu, thread); 6916 6917 hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC, 6918 HRTIMER_MODE_REL_PINNED_SOFT); 6919 port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb; 6920 port_pcpu->timer_scheduled = false; 6921 port_pcpu->dev = dev; 6922 } 6923 } 6924 6925 features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 6926 NETIF_F_TSO; 6927 dev->features = features | NETIF_F_RXCSUM; 6928 dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO | 6929 NETIF_F_HW_VLAN_CTAG_FILTER; 6930 6931 if (mvpp22_rss_is_supported(port)) { 6932 dev->hw_features |= NETIF_F_RXHASH; 6933 dev->features |= NETIF_F_NTUPLE; 6934 } 6935 6936 if (!port->priv->percpu_pools) 6937 mvpp2_set_hw_csum(port, port->pool_long->id); 6938 else if (port->ntxqs >= num_possible_cpus() * 2) 6939 dev->xdp_features = NETDEV_XDP_ACT_BASIC | 6940 NETDEV_XDP_ACT_REDIRECT | 6941 NETDEV_XDP_ACT_NDO_XMIT; 6942 6943 dev->vlan_features |= features; 6944 netif_set_tso_max_segs(dev, MVPP2_MAX_TSO_SEGS); 6945 6946 dev->priv_flags |= IFF_UNICAST_FLT; 6947 6948 /* MTU range: 68 - 9704 */ 6949 dev->min_mtu = ETH_MIN_MTU; 6950 /* 9704 == 9728 - 20 and rounding to 8 */ 6951 dev->max_mtu = MVPP2_BM_JUMBO_PKT_SIZE; 6952 device_set_node(&dev->dev, port_fwnode); 6953 dev->dev_port = port->id; 6954 6955 port->pcs_gmac.ops = &mvpp2_phylink_gmac_pcs_ops; 6956 port->pcs_gmac.neg_mode = true; 6957 port->pcs_xlg.ops = &mvpp2_phylink_xlg_pcs_ops; 6958 port->pcs_xlg.neg_mode = true; 6959 6960 if (!mvpp2_use_acpi_compat_mode(port_fwnode)) { 6961 port->phylink_config.dev = &dev->dev; 6962 port->phylink_config.type = PHYLINK_NETDEV; 6963 port->phylink_config.mac_capabilities = 6964 MAC_2500FD | MAC_1000FD | MAC_100 | MAC_10; 6965 6966 if (port->priv->global_tx_fc) 6967 port->phylink_config.mac_capabilities |= 6968 MAC_SYM_PAUSE | MAC_ASYM_PAUSE; 6969 6970 if (mvpp2_port_supports_xlg(port)) { 6971 /* If a COMPHY is present, we can support any of 6972 * the serdes modes and switch between them. 6973 */ 6974 if (comphy) { 6975 __set_bit(PHY_INTERFACE_MODE_5GBASER, 6976 port->phylink_config.supported_interfaces); 6977 __set_bit(PHY_INTERFACE_MODE_10GBASER, 6978 port->phylink_config.supported_interfaces); 6979 __set_bit(PHY_INTERFACE_MODE_XAUI, 6980 port->phylink_config.supported_interfaces); 6981 } else if (phy_mode == PHY_INTERFACE_MODE_5GBASER) { 6982 __set_bit(PHY_INTERFACE_MODE_5GBASER, 6983 port->phylink_config.supported_interfaces); 6984 } else if (phy_mode == PHY_INTERFACE_MODE_10GBASER) { 6985 __set_bit(PHY_INTERFACE_MODE_10GBASER, 6986 port->phylink_config.supported_interfaces); 6987 } else if (phy_mode == PHY_INTERFACE_MODE_XAUI) { 6988 __set_bit(PHY_INTERFACE_MODE_XAUI, 6989 port->phylink_config.supported_interfaces); 6990 } 6991 6992 if (comphy) 6993 port->phylink_config.mac_capabilities |= 6994 MAC_10000FD | MAC_5000FD; 6995 else if (phy_mode == PHY_INTERFACE_MODE_5GBASER) 6996 port->phylink_config.mac_capabilities |= 6997 MAC_5000FD; 6998 else 6999 port->phylink_config.mac_capabilities |= 7000 MAC_10000FD; 7001 } 7002 7003 if (mvpp2_port_supports_rgmii(port)) { 7004 phy_interface_set_rgmii(port->phylink_config.supported_interfaces); 7005 __set_bit(PHY_INTERFACE_MODE_MII, 7006 port->phylink_config.supported_interfaces); 7007 } 7008 7009 if (comphy) { 7010 /* If a COMPHY is present, we can support any of the 7011 * serdes modes and switch between them. 7012 */ 7013 __set_bit(PHY_INTERFACE_MODE_SGMII, 7014 port->phylink_config.supported_interfaces); 7015 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 7016 port->phylink_config.supported_interfaces); 7017 __set_bit(PHY_INTERFACE_MODE_2500BASEX, 7018 port->phylink_config.supported_interfaces); 7019 } else if (phy_mode == PHY_INTERFACE_MODE_2500BASEX) { 7020 /* No COMPHY, with only 2500BASE-X mode supported */ 7021 __set_bit(PHY_INTERFACE_MODE_2500BASEX, 7022 port->phylink_config.supported_interfaces); 7023 } else if (phy_mode == PHY_INTERFACE_MODE_1000BASEX || 7024 phy_mode == PHY_INTERFACE_MODE_SGMII) { 7025 /* No COMPHY, we can switch between 1000BASE-X and SGMII 7026 */ 7027 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 7028 port->phylink_config.supported_interfaces); 7029 __set_bit(PHY_INTERFACE_MODE_SGMII, 7030 port->phylink_config.supported_interfaces); 7031 } 7032 7033 phylink = phylink_create(&port->phylink_config, port_fwnode, 7034 phy_mode, &mvpp2_phylink_ops); 7035 if (IS_ERR(phylink)) { 7036 err = PTR_ERR(phylink); 7037 goto err_free_port_pcpu; 7038 } 7039 port->phylink = phylink; 7040 } else { 7041 dev_warn(&pdev->dev, "Use link irqs for port#%d. FW update required\n", port->id); 7042 port->phylink = NULL; 7043 } 7044 7045 /* Cycle the comphy to power it down, saving 270mW per port - 7046 * don't worry about an error powering it up. When the comphy 7047 * driver does this, we can remove this code. 7048 */ 7049 if (port->comphy) { 7050 err = mvpp22_comphy_init(port, port->phy_interface); 7051 if (err == 0) 7052 phy_power_off(port->comphy); 7053 } 7054 7055 err = register_netdev(dev); 7056 if (err < 0) { 7057 dev_err(&pdev->dev, "failed to register netdev\n"); 7058 goto err_phylink; 7059 } 7060 netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr); 7061 7062 priv->port_list[priv->port_count++] = port; 7063 7064 return 0; 7065 7066 err_phylink: 7067 if (port->phylink) 7068 phylink_destroy(port->phylink); 7069 err_free_port_pcpu: 7070 free_percpu(port->pcpu); 7071 err_free_txq_pcpu: 7072 for (i = 0; i < port->ntxqs; i++) 7073 free_percpu(port->txqs[i]->pcpu); 7074 err_free_stats: 7075 free_percpu(port->stats); 7076 err_free_irq: 7077 if (port->port_irq) 7078 irq_dispose_mapping(port->port_irq); 7079 err_deinit_qvecs: 7080 mvpp2_queue_vectors_deinit(port); 7081 err_free_netdev: 7082 free_netdev(dev); 7083 return err; 7084 } 7085 7086 /* Ports removal routine */ 7087 static void mvpp2_port_remove(struct mvpp2_port *port) 7088 { 7089 int i; 7090 7091 unregister_netdev(port->dev); 7092 if (port->phylink) 7093 phylink_destroy(port->phylink); 7094 free_percpu(port->pcpu); 7095 free_percpu(port->stats); 7096 for (i = 0; i < port->ntxqs; i++) 7097 free_percpu(port->txqs[i]->pcpu); 7098 mvpp2_queue_vectors_deinit(port); 7099 if (port->port_irq) 7100 irq_dispose_mapping(port->port_irq); 7101 free_netdev(port->dev); 7102 } 7103 7104 /* Initialize decoding windows */ 7105 static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram, 7106 struct mvpp2 *priv) 7107 { 7108 u32 win_enable; 7109 int i; 7110 7111 for (i = 0; i < 6; i++) { 7112 mvpp2_write(priv, MVPP2_WIN_BASE(i), 0); 7113 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0); 7114 7115 if (i < 4) 7116 mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0); 7117 } 7118 7119 win_enable = 0; 7120 7121 for (i = 0; i < dram->num_cs; i++) { 7122 const struct mbus_dram_window *cs = dram->cs + i; 7123 7124 mvpp2_write(priv, MVPP2_WIN_BASE(i), 7125 (cs->base & 0xffff0000) | (cs->mbus_attr << 8) | 7126 dram->mbus_dram_target_id); 7127 7128 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 7129 (cs->size - 1) & 0xffff0000); 7130 7131 win_enable |= (1 << i); 7132 } 7133 7134 mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable); 7135 } 7136 7137 /* Initialize Rx FIFO's */ 7138 static void mvpp2_rx_fifo_init(struct mvpp2 *priv) 7139 { 7140 int port; 7141 7142 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 7143 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 7144 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 7145 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 7146 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 7147 } 7148 7149 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 7150 MVPP2_RX_FIFO_PORT_MIN_PKT); 7151 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 7152 } 7153 7154 static void mvpp22_rx_fifo_set_hw(struct mvpp2 *priv, int port, int data_size) 7155 { 7156 int attr_size = MVPP2_RX_FIFO_PORT_ATTR_SIZE(data_size); 7157 7158 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), data_size); 7159 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), attr_size); 7160 } 7161 7162 /* Initialize TX FIFO's: the total FIFO size is 48kB on PPv2.2 and PPv2.3. 7163 * 4kB fixed space must be assigned for the loopback port. 7164 * Redistribute remaining avialable 44kB space among all active ports. 7165 * Guarantee minimum 32kB for 10G port and 8kB for port 1, capable of 2.5G 7166 * SGMII link. 7167 */ 7168 static void mvpp22_rx_fifo_init(struct mvpp2 *priv) 7169 { 7170 int remaining_ports_count; 7171 unsigned long port_map; 7172 int size_remainder; 7173 int port, size; 7174 7175 /* The loopback requires fixed 4kB of the FIFO space assignment. */ 7176 mvpp22_rx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX, 7177 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 7178 port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX); 7179 7180 /* Set RX FIFO size to 0 for inactive ports. */ 7181 for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) 7182 mvpp22_rx_fifo_set_hw(priv, port, 0); 7183 7184 /* Assign remaining RX FIFO space among all active ports. */ 7185 size_remainder = MVPP2_RX_FIFO_PORT_DATA_SIZE_44KB; 7186 remaining_ports_count = hweight_long(port_map); 7187 7188 for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) { 7189 if (remaining_ports_count == 1) 7190 size = size_remainder; 7191 else if (port == 0) 7192 size = max(size_remainder / remaining_ports_count, 7193 MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB); 7194 else if (port == 1) 7195 size = max(size_remainder / remaining_ports_count, 7196 MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB); 7197 else 7198 size = size_remainder / remaining_ports_count; 7199 7200 size_remainder -= size; 7201 remaining_ports_count--; 7202 7203 mvpp22_rx_fifo_set_hw(priv, port, size); 7204 } 7205 7206 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 7207 MVPP2_RX_FIFO_PORT_MIN_PKT); 7208 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 7209 } 7210 7211 /* Configure Rx FIFO Flow control thresholds */ 7212 static void mvpp23_rx_fifo_fc_set_tresh(struct mvpp2 *priv) 7213 { 7214 int port, val; 7215 7216 /* Port 0: maximum speed -10Gb/s port 7217 * required by spec RX FIFO threshold 9KB 7218 * Port 1: maximum speed -5Gb/s port 7219 * required by spec RX FIFO threshold 4KB 7220 * Port 2: maximum speed -1Gb/s port 7221 * required by spec RX FIFO threshold 2KB 7222 */ 7223 7224 /* Without loopback port */ 7225 for (port = 0; port < (MVPP2_MAX_PORTS - 1); port++) { 7226 if (port == 0) { 7227 val = (MVPP23_PORT0_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7228 << MVPP2_RX_FC_TRSH_OFFS; 7229 val &= MVPP2_RX_FC_TRSH_MASK; 7230 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7231 } else if (port == 1) { 7232 val = (MVPP23_PORT1_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7233 << MVPP2_RX_FC_TRSH_OFFS; 7234 val &= MVPP2_RX_FC_TRSH_MASK; 7235 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7236 } else { 7237 val = (MVPP23_PORT2_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) 7238 << MVPP2_RX_FC_TRSH_OFFS; 7239 val &= MVPP2_RX_FC_TRSH_MASK; 7240 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7241 } 7242 } 7243 } 7244 7245 /* Configure Rx FIFO Flow control thresholds */ 7246 void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en) 7247 { 7248 int val; 7249 7250 val = mvpp2_read(priv, MVPP2_RX_FC_REG(port)); 7251 7252 if (en) 7253 val |= MVPP2_RX_FC_EN; 7254 else 7255 val &= ~MVPP2_RX_FC_EN; 7256 7257 mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); 7258 } 7259 7260 static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size) 7261 { 7262 int threshold = MVPP2_TX_FIFO_THRESHOLD(size); 7263 7264 mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port), size); 7265 mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), threshold); 7266 } 7267 7268 /* Initialize TX FIFO's: the total FIFO size is 19kB on PPv2.2 and PPv2.3. 7269 * 1kB fixed space must be assigned for the loopback port. 7270 * Redistribute remaining avialable 18kB space among all active ports. 7271 * The 10G interface should use 10kB (which is maximum possible size 7272 * per single port). 7273 */ 7274 static void mvpp22_tx_fifo_init(struct mvpp2 *priv) 7275 { 7276 int remaining_ports_count; 7277 unsigned long port_map; 7278 int size_remainder; 7279 int port, size; 7280 7281 /* The loopback requires fixed 1kB of the FIFO space assignment. */ 7282 mvpp22_tx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX, 7283 MVPP22_TX_FIFO_DATA_SIZE_1KB); 7284 port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX); 7285 7286 /* Set TX FIFO size to 0 for inactive ports. */ 7287 for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) 7288 mvpp22_tx_fifo_set_hw(priv, port, 0); 7289 7290 /* Assign remaining TX FIFO space among all active ports. */ 7291 size_remainder = MVPP22_TX_FIFO_DATA_SIZE_18KB; 7292 remaining_ports_count = hweight_long(port_map); 7293 7294 for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) { 7295 if (remaining_ports_count == 1) 7296 size = min(size_remainder, 7297 MVPP22_TX_FIFO_DATA_SIZE_10KB); 7298 else if (port == 0) 7299 size = MVPP22_TX_FIFO_DATA_SIZE_10KB; 7300 else 7301 size = size_remainder / remaining_ports_count; 7302 7303 size_remainder -= size; 7304 remaining_ports_count--; 7305 7306 mvpp22_tx_fifo_set_hw(priv, port, size); 7307 } 7308 } 7309 7310 static void mvpp2_axi_init(struct mvpp2 *priv) 7311 { 7312 u32 val, rdval, wrval; 7313 7314 mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0); 7315 7316 /* AXI Bridge Configuration */ 7317 7318 rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE 7319 << MVPP22_AXI_ATTR_CACHE_OFFS; 7320 rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7321 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 7322 7323 wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE 7324 << MVPP22_AXI_ATTR_CACHE_OFFS; 7325 wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7326 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 7327 7328 /* BM */ 7329 mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval); 7330 mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval); 7331 7332 /* Descriptors */ 7333 mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval); 7334 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval); 7335 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval); 7336 mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval); 7337 7338 /* Buffer Data */ 7339 mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval); 7340 mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval); 7341 7342 val = MVPP22_AXI_CODE_CACHE_NON_CACHE 7343 << MVPP22_AXI_CODE_CACHE_OFFS; 7344 val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM 7345 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7346 mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val); 7347 mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val); 7348 7349 val = MVPP22_AXI_CODE_CACHE_RD_CACHE 7350 << MVPP22_AXI_CODE_CACHE_OFFS; 7351 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7352 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7353 7354 mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val); 7355 7356 val = MVPP22_AXI_CODE_CACHE_WR_CACHE 7357 << MVPP22_AXI_CODE_CACHE_OFFS; 7358 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 7359 << MVPP22_AXI_CODE_DOMAIN_OFFS; 7360 7361 mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val); 7362 } 7363 7364 /* Initialize network controller common part HW */ 7365 static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv) 7366 { 7367 const struct mbus_dram_target_info *dram_target_info; 7368 int err, i; 7369 u32 val; 7370 7371 /* MBUS windows configuration */ 7372 dram_target_info = mv_mbus_dram_info(); 7373 if (dram_target_info) 7374 mvpp2_conf_mbus_windows(dram_target_info, priv); 7375 7376 if (priv->hw_version >= MVPP22) 7377 mvpp2_axi_init(priv); 7378 7379 /* Disable HW PHY polling */ 7380 if (priv->hw_version == MVPP21) { 7381 val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 7382 val |= MVPP2_PHY_AN_STOP_SMI0_MASK; 7383 writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 7384 } else { 7385 val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 7386 val &= ~MVPP22_SMI_POLLING_EN; 7387 writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 7388 } 7389 7390 /* Allocate and initialize aggregated TXQs */ 7391 priv->aggr_txqs = devm_kcalloc(&pdev->dev, MVPP2_MAX_THREADS, 7392 sizeof(*priv->aggr_txqs), 7393 GFP_KERNEL); 7394 if (!priv->aggr_txqs) 7395 return -ENOMEM; 7396 7397 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7398 priv->aggr_txqs[i].id = i; 7399 priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE; 7400 err = mvpp2_aggr_txq_init(pdev, &priv->aggr_txqs[i], i, priv); 7401 if (err < 0) 7402 return err; 7403 } 7404 7405 /* Fifo Init */ 7406 if (priv->hw_version == MVPP21) { 7407 mvpp2_rx_fifo_init(priv); 7408 } else { 7409 mvpp22_rx_fifo_init(priv); 7410 mvpp22_tx_fifo_init(priv); 7411 if (priv->hw_version == MVPP23) 7412 mvpp23_rx_fifo_fc_set_tresh(priv); 7413 } 7414 7415 if (priv->hw_version == MVPP21) 7416 writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT, 7417 priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG); 7418 7419 /* Allow cache snoop when transmiting packets */ 7420 mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1); 7421 7422 /* Buffer Manager initialization */ 7423 err = mvpp2_bm_init(&pdev->dev, priv); 7424 if (err < 0) 7425 return err; 7426 7427 /* Parser default initialization */ 7428 err = mvpp2_prs_default_init(pdev, priv); 7429 if (err < 0) 7430 return err; 7431 7432 /* Classifier default initialization */ 7433 mvpp2_cls_init(priv); 7434 7435 return 0; 7436 } 7437 7438 static int mvpp2_get_sram(struct platform_device *pdev, 7439 struct mvpp2 *priv) 7440 { 7441 struct resource *res; 7442 void __iomem *base; 7443 7444 res = platform_get_resource(pdev, IORESOURCE_MEM, 2); 7445 if (!res) { 7446 if (has_acpi_companion(&pdev->dev)) 7447 dev_warn(&pdev->dev, "ACPI is too old, Flow control not supported\n"); 7448 else 7449 dev_warn(&pdev->dev, "DT is too old, Flow control not supported\n"); 7450 return 0; 7451 } 7452 7453 base = devm_ioremap_resource(&pdev->dev, res); 7454 if (IS_ERR(base)) 7455 return PTR_ERR(base); 7456 7457 priv->cm3_base = base; 7458 return 0; 7459 } 7460 7461 static int mvpp2_probe(struct platform_device *pdev) 7462 { 7463 struct mvpp2 *priv; 7464 struct resource *res; 7465 void __iomem *base; 7466 int i, shared; 7467 int err; 7468 7469 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 7470 if (!priv) 7471 return -ENOMEM; 7472 7473 priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev); 7474 7475 /* multi queue mode isn't supported on PPV2.1, fallback to single 7476 * mode 7477 */ 7478 if (priv->hw_version == MVPP21) 7479 queue_mode = MVPP2_QDIST_SINGLE_MODE; 7480 7481 base = devm_platform_ioremap_resource(pdev, 0); 7482 if (IS_ERR(base)) 7483 return PTR_ERR(base); 7484 7485 if (priv->hw_version == MVPP21) { 7486 priv->lms_base = devm_platform_ioremap_resource(pdev, 1); 7487 if (IS_ERR(priv->lms_base)) 7488 return PTR_ERR(priv->lms_base); 7489 } else { 7490 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 7491 if (!res) { 7492 dev_err(&pdev->dev, "Invalid resource\n"); 7493 return -EINVAL; 7494 } 7495 if (has_acpi_companion(&pdev->dev)) { 7496 /* In case the MDIO memory region is declared in 7497 * the ACPI, it can already appear as 'in-use' 7498 * in the OS. Because it is overlapped by second 7499 * region of the network controller, make 7500 * sure it is released, before requesting it again. 7501 * The care is taken by mvpp2 driver to avoid 7502 * concurrent access to this memory region. 7503 */ 7504 release_resource(res); 7505 } 7506 priv->iface_base = devm_ioremap_resource(&pdev->dev, res); 7507 if (IS_ERR(priv->iface_base)) 7508 return PTR_ERR(priv->iface_base); 7509 7510 /* Map CM3 SRAM */ 7511 err = mvpp2_get_sram(pdev, priv); 7512 if (err) 7513 dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n"); 7514 7515 /* Enable global Flow Control only if handler to SRAM not NULL */ 7516 if (priv->cm3_base) 7517 priv->global_tx_fc = true; 7518 } 7519 7520 if (priv->hw_version >= MVPP22 && dev_of_node(&pdev->dev)) { 7521 priv->sysctrl_base = 7522 syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 7523 "marvell,system-controller"); 7524 if (IS_ERR(priv->sysctrl_base)) 7525 /* The system controller regmap is optional for dt 7526 * compatibility reasons. When not provided, the 7527 * configuration of the GoP relies on the 7528 * firmware/bootloader. 7529 */ 7530 priv->sysctrl_base = NULL; 7531 } 7532 7533 if (priv->hw_version >= MVPP22 && 7534 mvpp2_get_nrxqs(priv) * 2 <= MVPP2_BM_MAX_POOLS) 7535 priv->percpu_pools = 1; 7536 7537 mvpp2_setup_bm_pool(); 7538 7539 7540 priv->nthreads = min_t(unsigned int, num_present_cpus(), 7541 MVPP2_MAX_THREADS); 7542 7543 shared = num_present_cpus() - priv->nthreads; 7544 if (shared > 0) 7545 bitmap_set(&priv->lock_map, 0, 7546 min_t(int, shared, MVPP2_MAX_THREADS)); 7547 7548 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7549 u32 addr_space_sz; 7550 7551 addr_space_sz = (priv->hw_version == MVPP21 ? 7552 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ); 7553 priv->swth_base[i] = base + i * addr_space_sz; 7554 } 7555 7556 if (priv->hw_version == MVPP21) 7557 priv->max_port_rxqs = 8; 7558 else 7559 priv->max_port_rxqs = 32; 7560 7561 if (dev_of_node(&pdev->dev)) { 7562 priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk"); 7563 if (IS_ERR(priv->pp_clk)) 7564 return PTR_ERR(priv->pp_clk); 7565 err = clk_prepare_enable(priv->pp_clk); 7566 if (err < 0) 7567 return err; 7568 7569 priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk"); 7570 if (IS_ERR(priv->gop_clk)) { 7571 err = PTR_ERR(priv->gop_clk); 7572 goto err_pp_clk; 7573 } 7574 err = clk_prepare_enable(priv->gop_clk); 7575 if (err < 0) 7576 goto err_pp_clk; 7577 7578 if (priv->hw_version >= MVPP22) { 7579 priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk"); 7580 if (IS_ERR(priv->mg_clk)) { 7581 err = PTR_ERR(priv->mg_clk); 7582 goto err_gop_clk; 7583 } 7584 7585 err = clk_prepare_enable(priv->mg_clk); 7586 if (err < 0) 7587 goto err_gop_clk; 7588 7589 priv->mg_core_clk = devm_clk_get_optional(&pdev->dev, "mg_core_clk"); 7590 if (IS_ERR(priv->mg_core_clk)) { 7591 err = PTR_ERR(priv->mg_core_clk); 7592 goto err_mg_clk; 7593 } 7594 7595 err = clk_prepare_enable(priv->mg_core_clk); 7596 if (err < 0) 7597 goto err_mg_clk; 7598 } 7599 7600 priv->axi_clk = devm_clk_get_optional(&pdev->dev, "axi_clk"); 7601 if (IS_ERR(priv->axi_clk)) { 7602 err = PTR_ERR(priv->axi_clk); 7603 goto err_mg_core_clk; 7604 } 7605 7606 err = clk_prepare_enable(priv->axi_clk); 7607 if (err < 0) 7608 goto err_mg_core_clk; 7609 7610 /* Get system's tclk rate */ 7611 priv->tclk = clk_get_rate(priv->pp_clk); 7612 } else { 7613 err = device_property_read_u32(&pdev->dev, "clock-frequency", &priv->tclk); 7614 if (err) { 7615 dev_err(&pdev->dev, "missing clock-frequency value\n"); 7616 return err; 7617 } 7618 } 7619 7620 if (priv->hw_version >= MVPP22) { 7621 err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK); 7622 if (err) 7623 goto err_axi_clk; 7624 /* Sadly, the BM pools all share the same register to 7625 * store the high 32 bits of their address. So they 7626 * must all have the same high 32 bits, which forces 7627 * us to restrict coherent memory to DMA_BIT_MASK(32). 7628 */ 7629 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 7630 if (err) 7631 goto err_axi_clk; 7632 } 7633 7634 /* Map DTS-active ports. Should be done before FIFO mvpp2_init */ 7635 device_for_each_child_node_scoped(&pdev->dev, port_fwnode) { 7636 if (!fwnode_property_read_u32(port_fwnode, "port-id", &i)) 7637 priv->port_map |= BIT(i); 7638 } 7639 7640 if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23) 7641 priv->hw_version = MVPP23; 7642 7643 /* Init mss lock */ 7644 spin_lock_init(&priv->mss_spinlock); 7645 7646 /* Initialize network controller */ 7647 err = mvpp2_init(pdev, priv); 7648 if (err < 0) { 7649 dev_err(&pdev->dev, "failed to initialize controller\n"); 7650 goto err_axi_clk; 7651 } 7652 7653 err = mvpp22_tai_probe(&pdev->dev, priv); 7654 if (err < 0) 7655 goto err_axi_clk; 7656 7657 /* Initialize ports */ 7658 device_for_each_child_node_scoped(&pdev->dev, port_fwnode) { 7659 err = mvpp2_port_probe(pdev, port_fwnode, priv); 7660 if (err < 0) 7661 goto err_port_probe; 7662 } 7663 7664 if (priv->port_count == 0) { 7665 dev_err(&pdev->dev, "no ports enabled\n"); 7666 err = -ENODEV; 7667 goto err_axi_clk; 7668 } 7669 7670 /* Statistics must be gathered regularly because some of them (like 7671 * packets counters) are 32-bit registers and could overflow quite 7672 * quickly. For instance, a 10Gb link used at full bandwidth with the 7673 * smallest packets (64B) will overflow a 32-bit counter in less than 7674 * 30 seconds. Then, use a workqueue to fill 64-bit counters. 7675 */ 7676 snprintf(priv->queue_name, sizeof(priv->queue_name), 7677 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev), 7678 priv->port_count > 1 ? "+" : ""); 7679 priv->stats_queue = create_singlethread_workqueue(priv->queue_name); 7680 if (!priv->stats_queue) { 7681 err = -ENOMEM; 7682 goto err_port_probe; 7683 } 7684 7685 if (priv->global_tx_fc && priv->hw_version >= MVPP22) { 7686 err = mvpp2_enable_global_fc(priv); 7687 if (err) 7688 dev_warn(&pdev->dev, "Minimum of CM3 firmware 18.09 and chip revision B0 required for flow control\n"); 7689 } 7690 7691 mvpp2_dbgfs_init(priv, pdev->name); 7692 7693 platform_set_drvdata(pdev, priv); 7694 return 0; 7695 7696 err_port_probe: 7697 for (i = 0; i < priv->port_count; i++) 7698 mvpp2_port_remove(priv->port_list[i]); 7699 err_axi_clk: 7700 clk_disable_unprepare(priv->axi_clk); 7701 err_mg_core_clk: 7702 clk_disable_unprepare(priv->mg_core_clk); 7703 err_mg_clk: 7704 clk_disable_unprepare(priv->mg_clk); 7705 err_gop_clk: 7706 clk_disable_unprepare(priv->gop_clk); 7707 err_pp_clk: 7708 clk_disable_unprepare(priv->pp_clk); 7709 return err; 7710 } 7711 7712 static void mvpp2_remove(struct platform_device *pdev) 7713 { 7714 struct mvpp2 *priv = platform_get_drvdata(pdev); 7715 int i, poolnum = MVPP2_BM_POOLS_NUM; 7716 7717 mvpp2_dbgfs_cleanup(priv); 7718 7719 for (i = 0; i < priv->port_count; i++) { 7720 mutex_destroy(&priv->port_list[i]->gather_stats_lock); 7721 mvpp2_port_remove(priv->port_list[i]); 7722 } 7723 7724 destroy_workqueue(priv->stats_queue); 7725 7726 if (priv->percpu_pools) 7727 poolnum = mvpp2_get_nrxqs(priv) * 2; 7728 7729 for (i = 0; i < poolnum; i++) { 7730 struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i]; 7731 7732 mvpp2_bm_pool_destroy(&pdev->dev, priv, bm_pool); 7733 } 7734 7735 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 7736 struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i]; 7737 7738 dma_free_coherent(&pdev->dev, 7739 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 7740 aggr_txq->descs, 7741 aggr_txq->descs_dma); 7742 } 7743 7744 if (!dev_of_node(&pdev->dev)) 7745 return; 7746 7747 clk_disable_unprepare(priv->axi_clk); 7748 clk_disable_unprepare(priv->mg_core_clk); 7749 clk_disable_unprepare(priv->mg_clk); 7750 clk_disable_unprepare(priv->pp_clk); 7751 clk_disable_unprepare(priv->gop_clk); 7752 } 7753 7754 static const struct of_device_id mvpp2_match[] = { 7755 { 7756 .compatible = "marvell,armada-375-pp2", 7757 .data = (void *)MVPP21, 7758 }, 7759 { 7760 .compatible = "marvell,armada-7k-pp22", 7761 .data = (void *)MVPP22, 7762 }, 7763 { } 7764 }; 7765 MODULE_DEVICE_TABLE(of, mvpp2_match); 7766 7767 #ifdef CONFIG_ACPI 7768 static const struct acpi_device_id mvpp2_acpi_match[] = { 7769 { "MRVL0110", MVPP22 }, 7770 { }, 7771 }; 7772 MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match); 7773 #endif 7774 7775 static struct platform_driver mvpp2_driver = { 7776 .probe = mvpp2_probe, 7777 .remove_new = mvpp2_remove, 7778 .driver = { 7779 .name = MVPP2_DRIVER_NAME, 7780 .of_match_table = mvpp2_match, 7781 .acpi_match_table = ACPI_PTR(mvpp2_acpi_match), 7782 }, 7783 }; 7784 7785 static int __init mvpp2_driver_init(void) 7786 { 7787 return platform_driver_register(&mvpp2_driver); 7788 } 7789 module_init(mvpp2_driver_init); 7790 7791 static void __exit mvpp2_driver_exit(void) 7792 { 7793 platform_driver_unregister(&mvpp2_driver); 7794 mvpp2_dbgfs_exit(); 7795 } 7796 module_exit(mvpp2_driver_exit); 7797 7798 MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com"); 7799 MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>"); 7800 MODULE_LICENSE("GPL v2"); 7801